diff options
| author | Greg Kroah-Hartman <gregkh@suse.de> | 2011-01-13 12:10:18 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-01-13 12:10:18 -0800 |
| commit | ab4382d27412e7e3e7c936e8d50d8888dfac3df8 (patch) | |
| tree | 51d96dea2431140358784b6b426715f37f74fd53 /drivers/serial | |
| parent | 728674a7e466628df2aeec6d11a2ae1ef968fb67 (diff) | |
tty: move drivers/serial/ to drivers/tty/serial/
The serial drivers are really just tty drivers, so move them to
drivers/tty/ to make things a bit neater overall.
This is part of the tty/serial driver movement proceedure as proposed by
Arnd Bergmann and approved by everyone involved a number of months ago.
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Rogier Wolff <R.E.Wolff@bitwizard.nl>
Cc: Michael H. Warfield <mhw@wittsend.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/serial')
119 files changed, 0 insertions, 97162 deletions
diff --git a/drivers/serial/21285.c b/drivers/serial/21285.c deleted file mode 100644 index d89aa38c5cf0..000000000000 --- a/drivers/serial/21285.c +++ /dev/null @@ -1,513 +0,0 @@ -/* - * linux/drivers/serial/21285.c - * - * Driver for the serial port on the 21285 StrongArm-110 core logic chip. - * - * Based on drivers/char/serial.c - */ -#include <linux/module.h> -#include <linux/tty.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/device.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/serial.h> -#include <linux/io.h> - -#include <asm/irq.h> -#include <asm/mach-types.h> -#include <asm/hardware/dec21285.h> -#include <mach/hardware.h> - -#define BAUD_BASE (mem_fclk_21285/64) - -#define SERIAL_21285_NAME "ttyFB" -#define SERIAL_21285_MAJOR 204 -#define SERIAL_21285_MINOR 4 - -#define RXSTAT_DUMMY_READ 0x80000000 -#define RXSTAT_FRAME (1 << 0) -#define RXSTAT_PARITY (1 << 1) -#define RXSTAT_OVERRUN (1 << 2) -#define RXSTAT_ANYERR (RXSTAT_FRAME|RXSTAT_PARITY|RXSTAT_OVERRUN) - -#define H_UBRLCR_BREAK (1 << 0) -#define H_UBRLCR_PARENB (1 << 1) -#define H_UBRLCR_PAREVN (1 << 2) -#define H_UBRLCR_STOPB (1 << 3) -#define H_UBRLCR_FIFO (1 << 4) - -static const char serial21285_name[] = "Footbridge UART"; - -#define tx_enabled(port) ((port)->unused[0]) -#define rx_enabled(port) ((port)->unused[1]) - -/* - * The documented expression for selecting the divisor is: - * BAUD_BASE / baud - 1 - * However, typically BAUD_BASE is not divisible by baud, so - * we want to select the divisor that gives us the minimum - * error. Therefore, we want: - * int(BAUD_BASE / baud - 0.5) -> - * int(BAUD_BASE / baud - (baud >> 1) / baud) -> - * int((BAUD_BASE - (baud >> 1)) / baud) - */ - -static void serial21285_stop_tx(struct uart_port *port) -{ - if (tx_enabled(port)) { - disable_irq_nosync(IRQ_CONTX); - tx_enabled(port) = 0; - } -} - -static void serial21285_start_tx(struct uart_port *port) -{ - if (!tx_enabled(port)) { - enable_irq(IRQ_CONTX); - tx_enabled(port) = 1; - } -} - -static void serial21285_stop_rx(struct uart_port *port) -{ - if (rx_enabled(port)) { - disable_irq_nosync(IRQ_CONRX); - rx_enabled(port) = 0; - } -} - -static void serial21285_enable_ms(struct uart_port *port) -{ -} - -static irqreturn_t serial21285_rx_chars(int irq, void *dev_id) -{ - struct uart_port *port = dev_id; - struct tty_struct *tty = port->state->port.tty; - unsigned int status, ch, flag, rxs, max_count = 256; - - status = *CSR_UARTFLG; - while (!(status & 0x10) && max_count--) { - ch = *CSR_UARTDR; - flag = TTY_NORMAL; - port->icount.rx++; - - rxs = *CSR_RXSTAT | RXSTAT_DUMMY_READ; - if (unlikely(rxs & RXSTAT_ANYERR)) { - if (rxs & RXSTAT_PARITY) - port->icount.parity++; - else if (rxs & RXSTAT_FRAME) - port->icount.frame++; - if (rxs & RXSTAT_OVERRUN) - port->icount.overrun++; - - rxs &= port->read_status_mask; - - if (rxs & RXSTAT_PARITY) - flag = TTY_PARITY; - else if (rxs & RXSTAT_FRAME) - flag = TTY_FRAME; - } - - uart_insert_char(port, rxs, RXSTAT_OVERRUN, ch, flag); - - status = *CSR_UARTFLG; - } - tty_flip_buffer_push(tty); - - return IRQ_HANDLED; -} - -static irqreturn_t serial21285_tx_chars(int irq, void *dev_id) -{ - struct uart_port *port = dev_id; - struct circ_buf *xmit = &port->state->xmit; - int count = 256; - - if (port->x_char) { - *CSR_UARTDR = port->x_char; - port->icount.tx++; - port->x_char = 0; - goto out; - } - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - serial21285_stop_tx(port); - goto out; - } - - do { - *CSR_UARTDR = xmit->buf[xmit->tail]; - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - if (uart_circ_empty(xmit)) - break; - } while (--count > 0 && !(*CSR_UARTFLG & 0x20)); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (uart_circ_empty(xmit)) - serial21285_stop_tx(port); - - out: - return IRQ_HANDLED; -} - -static unsigned int serial21285_tx_empty(struct uart_port *port) -{ - return (*CSR_UARTFLG & 8) ? 0 : TIOCSER_TEMT; -} - -/* no modem control lines */ -static unsigned int serial21285_get_mctrl(struct uart_port *port) -{ - return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; -} - -static void serial21285_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ -} - -static void serial21285_break_ctl(struct uart_port *port, int break_state) -{ - unsigned long flags; - unsigned int h_lcr; - - spin_lock_irqsave(&port->lock, flags); - h_lcr = *CSR_H_UBRLCR; - if (break_state) - h_lcr |= H_UBRLCR_BREAK; - else - h_lcr &= ~H_UBRLCR_BREAK; - *CSR_H_UBRLCR = h_lcr; - spin_unlock_irqrestore(&port->lock, flags); -} - -static int serial21285_startup(struct uart_port *port) -{ - int ret; - - tx_enabled(port) = 1; - rx_enabled(port) = 1; - - ret = request_irq(IRQ_CONRX, serial21285_rx_chars, 0, - serial21285_name, port); - if (ret == 0) { - ret = request_irq(IRQ_CONTX, serial21285_tx_chars, 0, - serial21285_name, port); - if (ret) - free_irq(IRQ_CONRX, port); - } - - return ret; -} - -static void serial21285_shutdown(struct uart_port *port) -{ - free_irq(IRQ_CONTX, port); - free_irq(IRQ_CONRX, port); -} - -static void -serial21285_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - unsigned long flags; - unsigned int baud, quot, h_lcr, b; - - /* - * We don't support modem control lines. - */ - termios->c_cflag &= ~(HUPCL | CRTSCTS | CMSPAR); - termios->c_cflag |= CLOCAL; - - /* - * We don't support BREAK character recognition. - */ - termios->c_iflag &= ~(IGNBRK | BRKINT); - - /* - * Ask the core to calculate the divisor for us. - */ - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); - quot = uart_get_divisor(port, baud); - b = port->uartclk / (16 * quot); - tty_termios_encode_baud_rate(termios, b, b); - - switch (termios->c_cflag & CSIZE) { - case CS5: - h_lcr = 0x00; - break; - case CS6: - h_lcr = 0x20; - break; - case CS7: - h_lcr = 0x40; - break; - default: /* CS8 */ - h_lcr = 0x60; - break; - } - - if (termios->c_cflag & CSTOPB) - h_lcr |= H_UBRLCR_STOPB; - if (termios->c_cflag & PARENB) { - h_lcr |= H_UBRLCR_PARENB; - if (!(termios->c_cflag & PARODD)) - h_lcr |= H_UBRLCR_PAREVN; - } - - if (port->fifosize) - h_lcr |= H_UBRLCR_FIFO; - - spin_lock_irqsave(&port->lock, flags); - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - /* - * Which character status flags are we interested in? - */ - port->read_status_mask = RXSTAT_OVERRUN; - if (termios->c_iflag & INPCK) - port->read_status_mask |= RXSTAT_FRAME | RXSTAT_PARITY; - - /* - * Which character status flags should we ignore? - */ - port->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= RXSTAT_FRAME | RXSTAT_PARITY; - if (termios->c_iflag & IGNBRK && termios->c_iflag & IGNPAR) - port->ignore_status_mask |= RXSTAT_OVERRUN; - - /* - * Ignore all characters if CREAD is not set. - */ - if ((termios->c_cflag & CREAD) == 0) - port->ignore_status_mask |= RXSTAT_DUMMY_READ; - - quot -= 1; - - *CSR_UARTCON = 0; - *CSR_L_UBRLCR = quot & 0xff; - *CSR_M_UBRLCR = (quot >> 8) & 0x0f; - *CSR_H_UBRLCR = h_lcr; - *CSR_UARTCON = 1; - - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *serial21285_type(struct uart_port *port) -{ - return port->type == PORT_21285 ? "DC21285" : NULL; -} - -static void serial21285_release_port(struct uart_port *port) -{ - release_mem_region(port->mapbase, 32); -} - -static int serial21285_request_port(struct uart_port *port) -{ - return request_mem_region(port->mapbase, 32, serial21285_name) - != NULL ? 0 : -EBUSY; -} - -static void serial21285_config_port(struct uart_port *port, int flags) -{ - if (flags & UART_CONFIG_TYPE && serial21285_request_port(port) == 0) - port->type = PORT_21285; -} - -/* - * verify the new serial_struct (for TIOCSSERIAL). - */ -static int serial21285_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - int ret = 0; - if (ser->type != PORT_UNKNOWN && ser->type != PORT_21285) - ret = -EINVAL; - if (ser->irq != NO_IRQ) - ret = -EINVAL; - if (ser->baud_base != port->uartclk / 16) - ret = -EINVAL; - return ret; -} - -static struct uart_ops serial21285_ops = { - .tx_empty = serial21285_tx_empty, - .get_mctrl = serial21285_get_mctrl, - .set_mctrl = serial21285_set_mctrl, - .stop_tx = serial21285_stop_tx, - .start_tx = serial21285_start_tx, - .stop_rx = serial21285_stop_rx, - .enable_ms = serial21285_enable_ms, - .break_ctl = serial21285_break_ctl, - .startup = serial21285_startup, - .shutdown = serial21285_shutdown, - .set_termios = serial21285_set_termios, - .type = serial21285_type, - .release_port = serial21285_release_port, - .request_port = serial21285_request_port, - .config_port = serial21285_config_port, - .verify_port = serial21285_verify_port, -}; - -static struct uart_port serial21285_port = { - .mapbase = 0x42000160, - .iotype = UPIO_MEM, - .irq = NO_IRQ, - .fifosize = 16, - .ops = &serial21285_ops, - .flags = UPF_BOOT_AUTOCONF, -}; - -static void serial21285_setup_ports(void) -{ - serial21285_port.uartclk = mem_fclk_21285 / 4; -} - -#ifdef CONFIG_SERIAL_21285_CONSOLE -static void serial21285_console_putchar(struct uart_port *port, int ch) -{ - while (*CSR_UARTFLG & 0x20) - barrier(); - *CSR_UARTDR = ch; -} - -static void -serial21285_console_write(struct console *co, const char *s, - unsigned int count) -{ - uart_console_write(&serial21285_port, s, count, serial21285_console_putchar); -} - -static void __init -serial21285_get_options(struct uart_port *port, int *baud, - int *parity, int *bits) -{ - if (*CSR_UARTCON == 1) { - unsigned int tmp; - - tmp = *CSR_H_UBRLCR; - switch (tmp & 0x60) { - case 0x00: - *bits = 5; - break; - case 0x20: - *bits = 6; - break; - case 0x40: - *bits = 7; - break; - default: - case 0x60: - *bits = 8; - break; - } - - if (tmp & H_UBRLCR_PARENB) { - *parity = 'o'; - if (tmp & H_UBRLCR_PAREVN) - *parity = 'e'; - } - - tmp = *CSR_L_UBRLCR | (*CSR_M_UBRLCR << 8); - - *baud = port->uartclk / (16 * (tmp + 1)); - } -} - -static int __init serial21285_console_setup(struct console *co, char *options) -{ - struct uart_port *port = &serial21285_port; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - if (machine_is_personal_server()) - baud = 57600; - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - else - serial21285_get_options(port, &baud, &parity, &bits); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - -static struct uart_driver serial21285_reg; - -static struct console serial21285_console = -{ - .name = SERIAL_21285_NAME, - .write = serial21285_console_write, - .device = uart_console_device, - .setup = serial21285_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &serial21285_reg, -}; - -static int __init rs285_console_init(void) -{ - serial21285_setup_ports(); - register_console(&serial21285_console); - return 0; -} -console_initcall(rs285_console_init); - -#define SERIAL_21285_CONSOLE &serial21285_console -#else -#define SERIAL_21285_CONSOLE NULL -#endif - -static struct uart_driver serial21285_reg = { - .owner = THIS_MODULE, - .driver_name = "ttyFB", - .dev_name = "ttyFB", - .major = SERIAL_21285_MAJOR, - .minor = SERIAL_21285_MINOR, - .nr = 1, - .cons = SERIAL_21285_CONSOLE, -}; - -static int __init serial21285_init(void) -{ - int ret; - - printk(KERN_INFO "Serial: 21285 driver\n"); - - serial21285_setup_ports(); - - ret = uart_register_driver(&serial21285_reg); - if (ret == 0) - uart_add_one_port(&serial21285_reg, &serial21285_port); - - return ret; -} - -static void __exit serial21285_exit(void) -{ - uart_remove_one_port(&serial21285_reg, &serial21285_port); - uart_unregister_driver(&serial21285_reg); -} - -module_init(serial21285_init); -module_exit(serial21285_exit); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Intel Footbridge (21285) serial driver"); -MODULE_ALIAS_CHARDEV(SERIAL_21285_MAJOR, SERIAL_21285_MINOR); diff --git a/drivers/serial/68328serial.c b/drivers/serial/68328serial.c deleted file mode 100644 index be0ebce36e54..000000000000 --- a/drivers/serial/68328serial.c +++ /dev/null @@ -1,1472 +0,0 @@ -/* 68328serial.c: Serial port driver for 68328 microcontroller - * - * Copyright (C) 1995 David S. Miller <davem@caip.rutgers.edu> - * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> - * Copyright (C) 1998, 1999 D. Jeff Dionne <jeff@uclinux.org> - * Copyright (C) 1999 Vladimir Gurevich <vgurevic@cisco.com> - * Copyright (C) 2002-2003 David McCullough <davidm@snapgear.com> - * Copyright (C) 2002 Greg Ungerer <gerg@snapgear.com> - * - * VZ Support/Fixes Evan Stawnyczy <e@lineo.ca> - * Multiple UART support Daniel Potts <danielp@cse.unsw.edu.au> - * Power management support Daniel Potts <danielp@cse.unsw.edu.au> - * VZ Second Serial Port enable Phil Wilshire - * 2.4/2.5 port David McCullough - */ - -#include <asm/dbg.h> -#include <linux/module.h> -#include <linux/errno.h> -#include <linux/signal.h> -#include <linux/sched.h> -#include <linux/timer.h> -#include <linux/interrupt.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/major.h> -#include <linux/string.h> -#include <linux/fcntl.h> -#include <linux/mm.h> -#include <linux/kernel.h> -#include <linux/console.h> -#include <linux/reboot.h> -#include <linux/keyboard.h> -#include <linux/init.h> -#include <linux/pm.h> -#include <linux/bitops.h> -#include <linux/delay.h> -#include <linux/gfp.h> - -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/system.h> -#include <asm/delay.h> -#include <asm/uaccess.h> - -/* (es) */ -/* note: perhaps we can murge these files, so that you can just - * define 1 of them, and they can sort that out for themselves - */ -#if defined(CONFIG_M68EZ328) -#include <asm/MC68EZ328.h> -#else -#if defined(CONFIG_M68VZ328) -#include <asm/MC68VZ328.h> -#else -#include <asm/MC68328.h> -#endif /* CONFIG_M68VZ328 */ -#endif /* CONFIG_M68EZ328 */ - -#include "68328serial.h" - -/* Turn off usage of real serial interrupt code, to "support" Copilot */ -#ifdef CONFIG_XCOPILOT_BUGS -#undef USE_INTS -#else -#define USE_INTS -#endif - -static struct m68k_serial m68k_soft[NR_PORTS]; - -static unsigned int uart_irqs[NR_PORTS] = UART_IRQ_DEFNS; - -/* multiple ports are contiguous in memory */ -m68328_uart *uart_addr = (m68328_uart *)USTCNT_ADDR; - -struct tty_struct m68k_ttys; -struct m68k_serial *m68k_consinfo = 0; - -#define M68K_CLOCK (16667000) /* FIXME: 16MHz is likely wrong */ - -struct tty_driver *serial_driver; - -/* number of characters left in xmit buffer before we ask for more */ -#define WAKEUP_CHARS 256 - -/* Debugging... DEBUG_INTR is bad to use when one of the zs - * lines is your console ;( - */ -#undef SERIAL_DEBUG_INTR -#undef SERIAL_DEBUG_OPEN -#undef SERIAL_DEBUG_FLOW - -#define RS_ISR_PASS_LIMIT 256 - -static void change_speed(struct m68k_serial *info); - -/* - * Setup for console. Argument comes from the boot command line. - */ - -/* note: this is messy, but it works, again, perhaps defined somewhere else?*/ -#ifdef CONFIG_M68VZ328 -#define CONSOLE_BAUD_RATE 19200 -#define DEFAULT_CBAUD B19200 -#endif - - -#ifndef CONSOLE_BAUD_RATE -#define CONSOLE_BAUD_RATE 9600 -#define DEFAULT_CBAUD B9600 -#endif - - -static int m68328_console_initted = 0; -static int m68328_console_baud = CONSOLE_BAUD_RATE; -static int m68328_console_cbaud = DEFAULT_CBAUD; - - -static inline int serial_paranoia_check(struct m68k_serial *info, - char *name, const char *routine) -{ -#ifdef SERIAL_PARANOIA_CHECK - static const char *badmagic = - "Warning: bad magic number for serial struct %s in %s\n"; - static const char *badinfo = - "Warning: null m68k_serial for %s in %s\n"; - - if (!info) { - printk(badinfo, name, routine); - return 1; - } - if (info->magic != SERIAL_MAGIC) { - printk(badmagic, name, routine); - return 1; - } -#endif - return 0; -} - -/* - * This is used to figure out the divisor speeds and the timeouts - */ -static int baud_table[] = { - 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, - 9600, 19200, 38400, 57600, 115200, 0 }; - -/* Sets or clears DTR/RTS on the requested line */ -static inline void m68k_rtsdtr(struct m68k_serial *ss, int set) -{ - if (set) { - /* set the RTS/CTS line */ - } else { - /* clear it */ - } - return; -} - -/* Utility routines */ -static inline int get_baud(struct m68k_serial *ss) -{ - unsigned long result = 115200; - unsigned short int baud = uart_addr[ss->line].ubaud; - if (GET_FIELD(baud, UBAUD_PRESCALER) == 0x38) result = 38400; - result >>= GET_FIELD(baud, UBAUD_DIVIDE); - - return result; -} - -/* - * ------------------------------------------------------------ - * rs_stop() and rs_start() - * - * This routines are called before setting or resetting tty->stopped. - * They enable or disable transmitter interrupts, as necessary. - * ------------------------------------------------------------ - */ -static void rs_stop(struct tty_struct *tty) -{ - struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; - m68328_uart *uart = &uart_addr[info->line]; - unsigned long flags; - - if (serial_paranoia_check(info, tty->name, "rs_stop")) - return; - - local_irq_save(flags); - uart->ustcnt &= ~USTCNT_TXEN; - local_irq_restore(flags); -} - -static int rs_put_char(char ch) -{ - int flags, loops = 0; - - local_irq_save(flags); - - while (!(UTX & UTX_TX_AVAIL) && (loops < 1000)) { - loops++; - udelay(5); - } - - UTX_TXDATA = ch; - udelay(5); - local_irq_restore(flags); - return 1; -} - -static void rs_start(struct tty_struct *tty) -{ - struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; - m68328_uart *uart = &uart_addr[info->line]; - unsigned long flags; - - if (serial_paranoia_check(info, tty->name, "rs_start")) - return; - - local_irq_save(flags); - if (info->xmit_cnt && info->xmit_buf && !(uart->ustcnt & USTCNT_TXEN)) { -#ifdef USE_INTS - uart->ustcnt |= USTCNT_TXEN | USTCNT_TX_INTR_MASK; -#else - uart->ustcnt |= USTCNT_TXEN; -#endif - } - local_irq_restore(flags); -} - -/* Drop into either the boot monitor or kadb upon receiving a break - * from keyboard/console input. - */ -static void batten_down_hatches(void) -{ - /* Drop into the debugger */ -} - -static void status_handle(struct m68k_serial *info, unsigned short status) -{ -#if 0 - if(status & DCD) { - if((info->port.tty->termios->c_cflag & CRTSCTS) && - ((info->curregs[3] & AUTO_ENAB)==0)) { - info->curregs[3] |= AUTO_ENAB; - info->pendregs[3] |= AUTO_ENAB; - write_zsreg(info->m68k_channel, 3, info->curregs[3]); - } - } else { - if((info->curregs[3] & AUTO_ENAB)) { - info->curregs[3] &= ~AUTO_ENAB; - info->pendregs[3] &= ~AUTO_ENAB; - write_zsreg(info->m68k_channel, 3, info->curregs[3]); - } - } -#endif - /* If this is console input and this is a - * 'break asserted' status change interrupt - * see if we can drop into the debugger - */ - if((status & URX_BREAK) && info->break_abort) - batten_down_hatches(); - return; -} - -static void receive_chars(struct m68k_serial *info, unsigned short rx) -{ - struct tty_struct *tty = info->port.tty; - m68328_uart *uart = &uart_addr[info->line]; - unsigned char ch, flag; - - /* - * This do { } while() loop will get ALL chars out of Rx FIFO - */ -#ifndef CONFIG_XCOPILOT_BUGS - do { -#endif - ch = GET_FIELD(rx, URX_RXDATA); - - if(info->is_cons) { - if(URX_BREAK & rx) { /* whee, break received */ - status_handle(info, rx); - return; -#ifdef CONFIG_MAGIC_SYSRQ - } else if (ch == 0x10) { /* ^P */ - show_state(); - show_free_areas(); - show_buffers(); -/* show_net_buffers(); */ - return; - } else if (ch == 0x12) { /* ^R */ - emergency_restart(); - return; -#endif /* CONFIG_MAGIC_SYSRQ */ - } - } - - if(!tty) - goto clear_and_exit; - - flag = TTY_NORMAL; - - if(rx & URX_PARITY_ERROR) { - flag = TTY_PARITY; - status_handle(info, rx); - } else if(rx & URX_OVRUN) { - flag = TTY_OVERRUN; - status_handle(info, rx); - } else if(rx & URX_FRAME_ERROR) { - flag = TTY_FRAME; - status_handle(info, rx); - } - tty_insert_flip_char(tty, ch, flag); -#ifndef CONFIG_XCOPILOT_BUGS - } while((rx = uart->urx.w) & URX_DATA_READY); -#endif - - tty_schedule_flip(tty); - -clear_and_exit: - return; -} - -static void transmit_chars(struct m68k_serial *info) -{ - m68328_uart *uart = &uart_addr[info->line]; - - if (info->x_char) { - /* Send next char */ - uart->utx.b.txdata = info->x_char; - info->x_char = 0; - goto clear_and_return; - } - - if((info->xmit_cnt <= 0) || info->port.tty->stopped) { - /* That's peculiar... TX ints off */ - uart->ustcnt &= ~USTCNT_TX_INTR_MASK; - goto clear_and_return; - } - - /* Send char */ - uart->utx.b.txdata = info->xmit_buf[info->xmit_tail++]; - info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1); - info->xmit_cnt--; - - if (info->xmit_cnt < WAKEUP_CHARS) - schedule_work(&info->tqueue); - - if(info->xmit_cnt <= 0) { - /* All done for now... TX ints off */ - uart->ustcnt &= ~USTCNT_TX_INTR_MASK; - goto clear_and_return; - } - -clear_and_return: - /* Clear interrupt (should be auto)*/ - return; -} - -/* - * This is the serial driver's generic interrupt routine - */ -irqreturn_t rs_interrupt(int irq, void *dev_id) -{ - struct m68k_serial *info = dev_id; - m68328_uart *uart; - unsigned short rx; - unsigned short tx; - - uart = &uart_addr[info->line]; - rx = uart->urx.w; - -#ifdef USE_INTS - tx = uart->utx.w; - - if (rx & URX_DATA_READY) receive_chars(info, rx); - if (tx & UTX_TX_AVAIL) transmit_chars(info); -#else - receive_chars(info, rx); -#endif - return IRQ_HANDLED; -} - -static void do_softint(struct work_struct *work) -{ - struct m68k_serial *info = container_of(work, struct m68k_serial, tqueue); - struct tty_struct *tty; - - tty = info->port.tty; - if (!tty) - return; -#if 0 - if (clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) { - tty_wakeup(tty); - } -#endif -} - -/* - * This routine is called from the scheduler tqueue when the interrupt - * routine has signalled that a hangup has occurred. The path of - * hangup processing is: - * - * serial interrupt routine -> (scheduler tqueue) -> - * do_serial_hangup() -> tty->hangup() -> rs_hangup() - * - */ -static void do_serial_hangup(struct work_struct *work) -{ - struct m68k_serial *info = container_of(work, struct m68k_serial, tqueue_hangup); - struct tty_struct *tty; - - tty = info->port.tty; - if (!tty) - return; - - tty_hangup(tty); -} - - -static int startup(struct m68k_serial * info) -{ - m68328_uart *uart = &uart_addr[info->line]; - unsigned long flags; - - if (info->flags & S_INITIALIZED) - return 0; - - if (!info->xmit_buf) { - info->xmit_buf = (unsigned char *) __get_free_page(GFP_KERNEL); - if (!info->xmit_buf) - return -ENOMEM; - } - - local_irq_save(flags); - - /* - * Clear the FIFO buffers and disable them - * (they will be reenabled in change_speed()) - */ - - uart->ustcnt = USTCNT_UEN; - info->xmit_fifo_size = 1; - uart->ustcnt = USTCNT_UEN | USTCNT_RXEN | USTCNT_TXEN; - (void)uart->urx.w; - - /* - * Finally, enable sequencing and interrupts - */ -#ifdef USE_INTS - uart->ustcnt = USTCNT_UEN | USTCNT_RXEN | - USTCNT_RX_INTR_MASK | USTCNT_TX_INTR_MASK; -#else - uart->ustcnt = USTCNT_UEN | USTCNT_RXEN | USTCNT_RX_INTR_MASK; -#endif - - if (info->port.tty) - clear_bit(TTY_IO_ERROR, &info->port.tty->flags); - info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; - - /* - * and set the speed of the serial port - */ - - change_speed(info); - - info->flags |= S_INITIALIZED; - local_irq_restore(flags); - return 0; -} - -/* - * This routine will shutdown a serial port; interrupts are disabled, and - * DTR is dropped if the hangup on close termio flag is on. - */ -static void shutdown(struct m68k_serial * info) -{ - m68328_uart *uart = &uart_addr[info->line]; - unsigned long flags; - - uart->ustcnt = 0; /* All off! */ - if (!(info->flags & S_INITIALIZED)) - return; - - local_irq_save(flags); - - if (info->xmit_buf) { - free_page((unsigned long) info->xmit_buf); - info->xmit_buf = 0; - } - - if (info->port.tty) - set_bit(TTY_IO_ERROR, &info->port.tty->flags); - - info->flags &= ~S_INITIALIZED; - local_irq_restore(flags); -} - -struct { - int divisor, prescale; -} -#ifndef CONFIG_M68VZ328 - hw_baud_table[18] = { - {0,0}, /* 0 */ - {0,0}, /* 50 */ - {0,0}, /* 75 */ - {0,0}, /* 110 */ - {0,0}, /* 134 */ - {0,0}, /* 150 */ - {0,0}, /* 200 */ - {7,0x26}, /* 300 */ - {6,0x26}, /* 600 */ - {5,0x26}, /* 1200 */ - {0,0}, /* 1800 */ - {4,0x26}, /* 2400 */ - {3,0x26}, /* 4800 */ - {2,0x26}, /* 9600 */ - {1,0x26}, /* 19200 */ - {0,0x26}, /* 38400 */ - {1,0x38}, /* 57600 */ - {0,0x38}, /* 115200 */ -}; -#else - hw_baud_table[18] = { - {0,0}, /* 0 */ - {0,0}, /* 50 */ - {0,0}, /* 75 */ - {0,0}, /* 110 */ - {0,0}, /* 134 */ - {0,0}, /* 150 */ - {0,0}, /* 200 */ - {0,0}, /* 300 */ - {7,0x26}, /* 600 */ - {6,0x26}, /* 1200 */ - {0,0}, /* 1800 */ - {5,0x26}, /* 2400 */ - {4,0x26}, /* 4800 */ - {3,0x26}, /* 9600 */ - {2,0x26}, /* 19200 */ - {1,0x26}, /* 38400 */ - {0,0x26}, /* 57600 */ - {1,0x38}, /* 115200 */ -}; -#endif -/* rate = 1036800 / ((65 - prescale) * (1<<divider)) */ - -/* - * This routine is called to set the UART divisor registers to match - * the specified baud rate for a serial port. - */ -static void change_speed(struct m68k_serial *info) -{ - m68328_uart *uart = &uart_addr[info->line]; - unsigned short port; - unsigned short ustcnt; - unsigned cflag; - int i; - - if (!info->port.tty || !info->port.tty->termios) - return; - cflag = info->port.tty->termios->c_cflag; - if (!(port = info->port)) - return; - - ustcnt = uart->ustcnt; - uart->ustcnt = ustcnt & ~USTCNT_TXEN; - - i = cflag & CBAUD; - if (i & CBAUDEX) { - i = (i & ~CBAUDEX) + B38400; - } - - info->baud = baud_table[i]; - uart->ubaud = PUT_FIELD(UBAUD_DIVIDE, hw_baud_table[i].divisor) | - PUT_FIELD(UBAUD_PRESCALER, hw_baud_table[i].prescale); - - ustcnt &= ~(USTCNT_PARITYEN | USTCNT_ODD_EVEN | USTCNT_STOP | USTCNT_8_7); - - if ((cflag & CSIZE) == CS8) - ustcnt |= USTCNT_8_7; - - if (cflag & CSTOPB) - ustcnt |= USTCNT_STOP; - - if (cflag & PARENB) - ustcnt |= USTCNT_PARITYEN; - if (cflag & PARODD) - ustcnt |= USTCNT_ODD_EVEN; - -#ifdef CONFIG_SERIAL_68328_RTS_CTS - if (cflag & CRTSCTS) { - uart->utx.w &= ~ UTX_NOCTS; - } else { - uart->utx.w |= UTX_NOCTS; - } -#endif - - ustcnt |= USTCNT_TXEN; - - uart->ustcnt = ustcnt; - return; -} - -/* - * Fair output driver allows a process to speak. - */ -static void rs_fair_output(void) -{ - int left; /* Output no more than that */ - unsigned long flags; - struct m68k_serial *info = &m68k_soft[0]; - char c; - - if (info == 0) return; - if (info->xmit_buf == 0) return; - - local_irq_save(flags); - left = info->xmit_cnt; - while (left != 0) { - c = info->xmit_buf[info->xmit_tail]; - info->xmit_tail = (info->xmit_tail+1) & (SERIAL_XMIT_SIZE-1); - info->xmit_cnt--; - local_irq_restore(flags); - - rs_put_char(c); - - local_irq_save(flags); - left = min(info->xmit_cnt, left-1); - } - - /* Last character is being transmitted now (hopefully). */ - udelay(5); - - local_irq_restore(flags); - return; -} - -/* - * m68k_console_print is registered for printk. - */ -void console_print_68328(const char *p) -{ - char c; - - while((c=*(p++)) != 0) { - if(c == '\n') - rs_put_char('\r'); - rs_put_char(c); - } - - /* Comment this if you want to have a strict interrupt-driven output */ - rs_fair_output(); - - return; -} - -static void rs_set_ldisc(struct tty_struct *tty) -{ - struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; - - if (serial_paranoia_check(info, tty->name, "rs_set_ldisc")) - return; - - info->is_cons = (tty->termios->c_line == N_TTY); - - printk("ttyS%d console mode %s\n", info->line, info->is_cons ? "on" : "off"); -} - -static void rs_flush_chars(struct tty_struct *tty) -{ - struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; - m68328_uart *uart = &uart_addr[info->line]; - unsigned long flags; - - if (serial_paranoia_check(info, tty->name, "rs_flush_chars")) - return; -#ifndef USE_INTS - for(;;) { -#endif - - /* Enable transmitter */ - local_irq_save(flags); - - if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || - !info->xmit_buf) { - local_irq_restore(flags); - return; - } - -#ifdef USE_INTS - uart->ustcnt |= USTCNT_TXEN | USTCNT_TX_INTR_MASK; -#else - uart->ustcnt |= USTCNT_TXEN; -#endif - -#ifdef USE_INTS - if (uart->utx.w & UTX_TX_AVAIL) { -#else - if (1) { -#endif - /* Send char */ - uart->utx.b.txdata = info->xmit_buf[info->xmit_tail++]; - info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1); - info->xmit_cnt--; - } - -#ifndef USE_INTS - while (!(uart->utx.w & UTX_TX_AVAIL)) udelay(5); - } -#endif - local_irq_restore(flags); -} - -extern void console_printn(const char * b, int count); - -static int rs_write(struct tty_struct * tty, - const unsigned char *buf, int count) -{ - int c, total = 0; - struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; - m68328_uart *uart = &uart_addr[info->line]; - unsigned long flags; - - if (serial_paranoia_check(info, tty->name, "rs_write")) - return 0; - - if (!tty || !info->xmit_buf) - return 0; - - local_save_flags(flags); - while (1) { - local_irq_disable(); - c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, - SERIAL_XMIT_SIZE - info->xmit_head)); - local_irq_restore(flags); - - if (c <= 0) - break; - - memcpy(info->xmit_buf + info->xmit_head, buf, c); - - local_irq_disable(); - info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1); - info->xmit_cnt += c; - local_irq_restore(flags); - buf += c; - count -= c; - total += c; - } - - if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) { - /* Enable transmitter */ - local_irq_disable(); -#ifndef USE_INTS - while(info->xmit_cnt) { -#endif - - uart->ustcnt |= USTCNT_TXEN; -#ifdef USE_INTS - uart->ustcnt |= USTCNT_TX_INTR_MASK; -#else - while (!(uart->utx.w & UTX_TX_AVAIL)) udelay(5); -#endif - if (uart->utx.w & UTX_TX_AVAIL) { - uart->utx.b.txdata = info->xmit_buf[info->xmit_tail++]; - info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1); - info->xmit_cnt--; - } - -#ifndef USE_INTS - } -#endif - local_irq_restore(flags); - } - - return total; -} - -static int rs_write_room(struct tty_struct *tty) -{ - struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; - int ret; - - if (serial_paranoia_check(info, tty->name, "rs_write_room")) - return 0; - ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; - if (ret < 0) - ret = 0; - return ret; -} - -static int rs_chars_in_buffer(struct tty_struct *tty) -{ - struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; - - if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer")) - return 0; - return info->xmit_cnt; -} - -static void rs_flush_buffer(struct tty_struct *tty) -{ - struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; - unsigned long flags; - - if (serial_paranoia_check(info, tty->name, "rs_flush_buffer")) - return; - local_irq_save(flags); - info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; - local_irq_restore(flags); - tty_wakeup(tty); -} - -/* - * ------------------------------------------------------------ - * rs_throttle() - * - * This routine is called by the upper-layer tty layer to signal that - * incoming characters should be throttled. - * ------------------------------------------------------------ - */ -static void rs_throttle(struct tty_struct * tty) -{ - struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; - - if (serial_paranoia_check(info, tty->name, "rs_throttle")) - return; - - if (I_IXOFF(tty)) - info->x_char = STOP_CHAR(tty); - - /* Turn off RTS line (do this atomic) */ -} - -static void rs_unthrottle(struct tty_struct * tty) -{ - struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; - - if (serial_paranoia_check(info, tty->name, "rs_unthrottle")) - return; - - if (I_IXOFF(tty)) { - if (info->x_char) - info->x_char = 0; - else - info->x_char = START_CHAR(tty); - } - - /* Assert RTS line (do this atomic) */ -} - -/* - * ------------------------------------------------------------ - * rs_ioctl() and friends - * ------------------------------------------------------------ - */ - -static int get_serial_info(struct m68k_serial * info, - struct serial_struct * retinfo) -{ - struct serial_struct tmp; - - if (!retinfo) - return -EFAULT; - memset(&tmp, 0, sizeof(tmp)); - tmp.type = info->type; - tmp.line = info->line; - tmp.port = info->port; - tmp.irq = info->irq; - tmp.flags = info->flags; - tmp.baud_base = info->baud_base; - tmp.close_delay = info->close_delay; - tmp.closing_wait = info->closing_wait; - tmp.custom_divisor = info->custom_divisor; - if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) - return -EFAULT; - - return 0; -} - -static int set_serial_info(struct m68k_serial * info, - struct serial_struct * new_info) -{ - struct serial_struct new_serial; - struct m68k_serial old_info; - int retval = 0; - - if (!new_info) - return -EFAULT; - if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) - return -EFAULT; - old_info = *info; - - if (!capable(CAP_SYS_ADMIN)) { - if ((new_serial.baud_base != info->baud_base) || - (new_serial.type != info->type) || - (new_serial.close_delay != info->close_delay) || - ((new_serial.flags & ~S_USR_MASK) != - (info->flags & ~S_USR_MASK))) - return -EPERM; - info->flags = ((info->flags & ~S_USR_MASK) | - (new_serial.flags & S_USR_MASK)); - info->custom_divisor = new_serial.custom_divisor; - goto check_and_exit; - } - - if (info->count > 1) - return -EBUSY; - - /* - * OK, past this point, all the error checking has been done. - * At this point, we start making changes..... - */ - - info->baud_base = new_serial.baud_base; - info->flags = ((info->flags & ~S_FLAGS) | - (new_serial.flags & S_FLAGS)); - info->type = new_serial.type; - info->close_delay = new_serial.close_delay; - info->closing_wait = new_serial.closing_wait; - -check_and_exit: - retval = startup(info); - return retval; -} - -/* - * get_lsr_info - get line status register info - * - * Purpose: Let user call ioctl() to get info when the UART physically - * is emptied. On bus types like RS485, the transmitter must - * release the bus after transmitting. This must be done when - * the transmit shift register is empty, not be done when the - * transmit holding register is empty. This functionality - * allows an RS485 driver to be written in user space. - */ -static int get_lsr_info(struct m68k_serial * info, unsigned int *value) -{ -#ifdef CONFIG_SERIAL_68328_RTS_CTS - m68328_uart *uart = &uart_addr[info->line]; -#endif - unsigned char status; - unsigned long flags; - - local_irq_save(flags); -#ifdef CONFIG_SERIAL_68328_RTS_CTS - status = (uart->utx.w & UTX_CTS_STAT) ? 1 : 0; -#else - status = 0; -#endif - local_irq_restore(flags); - return put_user(status, value); -} - -/* - * This routine sends a break character out the serial port. - */ -static void send_break(struct m68k_serial * info, unsigned int duration) -{ - m68328_uart *uart = &uart_addr[info->line]; - unsigned long flags; - if (!info->port) - return; - local_irq_save(flags); -#ifdef USE_INTS - uart->utx.w |= UTX_SEND_BREAK; - msleep_interruptible(duration); - uart->utx.w &= ~UTX_SEND_BREAK; -#endif - local_irq_restore(flags); -} - -static int rs_ioctl(struct tty_struct *tty, struct file * file, - unsigned int cmd, unsigned long arg) -{ - int error; - struct m68k_serial * info = (struct m68k_serial *)tty->driver_data; - int retval; - - if (serial_paranoia_check(info, tty->name, "rs_ioctl")) - return -ENODEV; - - if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && - (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) && - (cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT)) { - if (tty->flags & (1 << TTY_IO_ERROR)) - return -EIO; - } - - switch (cmd) { - case TCSBRK: /* SVID version: non-zero arg --> no break */ - retval = tty_check_change(tty); - if (retval) - return retval; - tty_wait_until_sent(tty, 0); - if (!arg) - send_break(info, 250); /* 1/4 second */ - return 0; - case TCSBRKP: /* support for POSIX tcsendbreak() */ - retval = tty_check_change(tty); - if (retval) - return retval; - tty_wait_until_sent(tty, 0); - send_break(info, arg ? arg*(100) : 250); - return 0; - case TIOCGSERIAL: - return get_serial_info(info, - (struct serial_struct *) arg); - case TIOCSSERIAL: - return set_serial_info(info, - (struct serial_struct *) arg); - case TIOCSERGETLSR: /* Get line status register */ - return get_lsr_info(info, (unsigned int *) arg); - case TIOCSERGSTRUCT: - if (copy_to_user((struct m68k_serial *) arg, - info, sizeof(struct m68k_serial))) - return -EFAULT; - return 0; - default: - return -ENOIOCTLCMD; - } - return 0; -} - -static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios) -{ - struct m68k_serial *info = (struct m68k_serial *)tty->driver_data; - - change_speed(info); - - if ((old_termios->c_cflag & CRTSCTS) && - !(tty->termios->c_cflag & CRTSCTS)) { - tty->hw_stopped = 0; - rs_start(tty); - } - -} - -/* - * ------------------------------------------------------------ - * rs_close() - * - * This routine is called when the serial port gets closed. First, we - * wait for the last remaining data to be sent. Then, we unlink its - * S structure from the interrupt chain if necessary, and we free - * that IRQ if nothing is left in the chain. - * ------------------------------------------------------------ - */ -static void rs_close(struct tty_struct *tty, struct file * filp) -{ - struct m68k_serial * info = (struct m68k_serial *)tty->driver_data; - m68328_uart *uart = &uart_addr[info->line]; - unsigned long flags; - - if (!info || serial_paranoia_check(info, tty->name, "rs_close")) - return; - - local_irq_save(flags); - - if (tty_hung_up_p(filp)) { - local_irq_restore(flags); - return; - } - - if ((tty->count == 1) && (info->count != 1)) { - /* - * Uh, oh. tty->count is 1, which means that the tty - * structure will be freed. Info->count should always - * be one in these conditions. If it's greater than - * one, we've got real problems, since it means the - * serial port won't be shutdown. - */ - printk("rs_close: bad serial port count; tty->count is 1, " - "info->count is %d\n", info->count); - info->count = 1; - } - if (--info->count < 0) { - printk("rs_close: bad serial port count for ttyS%d: %d\n", - info->line, info->count); - info->count = 0; - } - if (info->count) { - local_irq_restore(flags); - return; - } - info->flags |= S_CLOSING; - /* - * Now we wait for the transmit buffer to clear; and we notify - * the line discipline to only process XON/XOFF characters. - */ - tty->closing = 1; - if (info->closing_wait != S_CLOSING_WAIT_NONE) - tty_wait_until_sent(tty, info->closing_wait); - /* - * At this point we stop accepting input. To do this, we - * disable the receive line status interrupts, and tell the - * interrupt driver to stop checking the data ready bit in the - * line status register. - */ - - uart->ustcnt &= ~USTCNT_RXEN; - uart->ustcnt &= ~(USTCNT_RXEN | USTCNT_RX_INTR_MASK); - - shutdown(info); - rs_flush_buffer(tty); - - tty_ldisc_flush(tty); - tty->closing = 0; - info->event = 0; - info->port.tty = NULL; -#warning "This is not and has never been valid so fix it" -#if 0 - if (tty->ldisc.num != ldiscs[N_TTY].num) { - if (tty->ldisc.close) - (tty->ldisc.close)(tty); - tty->ldisc = ldiscs[N_TTY]; - tty->termios->c_line = N_TTY; - if (tty->ldisc.open) - (tty->ldisc.open)(tty); - } -#endif - if (info->blocked_open) { - if (info->close_delay) { - msleep_interruptible(jiffies_to_msecs(info->close_delay)); - } - wake_up_interruptible(&info->open_wait); - } - info->flags &= ~(S_NORMAL_ACTIVE|S_CLOSING); - wake_up_interruptible(&info->close_wait); - local_irq_restore(flags); -} - -/* - * rs_hangup() --- called by tty_hangup() when a hangup is signaled. - */ -void rs_hangup(struct tty_struct *tty) -{ - struct m68k_serial * info = (struct m68k_serial *)tty->driver_data; - - if (serial_paranoia_check(info, tty->name, "rs_hangup")) - return; - - rs_flush_buffer(tty); - shutdown(info); - info->event = 0; - info->count = 0; - info->flags &= ~S_NORMAL_ACTIVE; - info->port.tty = NULL; - wake_up_interruptible(&info->open_wait); -} - -/* - * ------------------------------------------------------------ - * rs_open() and friends - * ------------------------------------------------------------ - */ -static int block_til_ready(struct tty_struct *tty, struct file * filp, - struct m68k_serial *info) -{ - DECLARE_WAITQUEUE(wait, current); - int retval; - int do_clocal = 0; - - /* - * If the device is in the middle of being closed, then block - * until it's done, and then try again. - */ - if (info->flags & S_CLOSING) { - interruptible_sleep_on(&info->close_wait); -#ifdef SERIAL_DO_RESTART - if (info->flags & S_HUP_NOTIFY) - return -EAGAIN; - else - return -ERESTARTSYS; -#else - return -EAGAIN; -#endif - } - - /* - * If non-blocking mode is set, or the port is not enabled, - * then make the check up front and then exit. - */ - if ((filp->f_flags & O_NONBLOCK) || - (tty->flags & (1 << TTY_IO_ERROR))) { - info->flags |= S_NORMAL_ACTIVE; - return 0; - } - - if (tty->termios->c_cflag & CLOCAL) - do_clocal = 1; - - /* - * Block waiting for the carrier detect and the line to become - * free (i.e., not in use by the callout). While we are in - * this loop, info->count is dropped by one, so that - * rs_close() knows when to free things. We restore it upon - * exit, either normal or abnormal. - */ - retval = 0; - add_wait_queue(&info->open_wait, &wait); - - info->count--; - info->blocked_open++; - while (1) { - local_irq_disable(); - m68k_rtsdtr(info, 1); - local_irq_enable(); - current->state = TASK_INTERRUPTIBLE; - if (tty_hung_up_p(filp) || - !(info->flags & S_INITIALIZED)) { -#ifdef SERIAL_DO_RESTART - if (info->flags & S_HUP_NOTIFY) - retval = -EAGAIN; - else - retval = -ERESTARTSYS; -#else - retval = -EAGAIN; -#endif - break; - } - if (!(info->flags & S_CLOSING) && do_clocal) - break; - if (signal_pending(current)) { - retval = -ERESTARTSYS; - break; - } - tty_unlock(); - schedule(); - tty_lock(); - } - current->state = TASK_RUNNING; - remove_wait_queue(&info->open_wait, &wait); - if (!tty_hung_up_p(filp)) - info->count++; - info->blocked_open--; - - if (retval) - return retval; - info->flags |= S_NORMAL_ACTIVE; - return 0; -} - -/* - * This routine is called whenever a serial port is opened. It - * enables interrupts for a serial port, linking in its S structure into - * the IRQ chain. It also performs the serial-specific - * initialization for the tty structure. - */ -int rs_open(struct tty_struct *tty, struct file * filp) -{ - struct m68k_serial *info; - int retval, line; - - line = tty->index; - - if (line >= NR_PORTS || line < 0) /* we have exactly one */ - return -ENODEV; - - info = &m68k_soft[line]; - - if (serial_paranoia_check(info, tty->name, "rs_open")) - return -ENODEV; - - info->count++; - tty->driver_data = info; - info->port.tty = tty; - - /* - * Start up serial port - */ - retval = startup(info); - if (retval) - return retval; - - return block_til_ready(tty, filp, info); -} - -/* Finally, routines used to initialize the serial driver. */ - -static void show_serial_version(void) -{ - printk("MC68328 serial driver version 1.00\n"); -} - -static const struct tty_operations rs_ops = { - .open = rs_open, - .close = rs_close, - .write = rs_write, - .flush_chars = rs_flush_chars, - .write_room = rs_write_room, - .chars_in_buffer = rs_chars_in_buffer, - .flush_buffer = rs_flush_buffer, - .ioctl = rs_ioctl, - .throttle = rs_throttle, - .unthrottle = rs_unthrottle, - .set_termios = rs_set_termios, - .stop = rs_stop, - .start = rs_start, - .hangup = rs_hangup, - .set_ldisc = rs_set_ldisc, -}; - -/* rs_init inits the driver */ -static int __init -rs68328_init(void) -{ - int flags, i; - struct m68k_serial *info; - - serial_driver = alloc_tty_driver(NR_PORTS); - if (!serial_driver) - return -ENOMEM; - - show_serial_version(); - - /* Initialize the tty_driver structure */ - /* SPARC: Not all of this is exactly right for us. */ - - serial_driver->name = "ttyS"; - serial_driver->major = TTY_MAJOR; - serial_driver->minor_start = 64; - serial_driver->type = TTY_DRIVER_TYPE_SERIAL; - serial_driver->subtype = SERIAL_TYPE_NORMAL; - serial_driver->init_termios = tty_std_termios; - serial_driver->init_termios.c_cflag = - m68328_console_cbaud | CS8 | CREAD | HUPCL | CLOCAL; - serial_driver->flags = TTY_DRIVER_REAL_RAW; - tty_set_operations(serial_driver, &rs_ops); - - if (tty_register_driver(serial_driver)) { - put_tty_driver(serial_driver); - printk(KERN_ERR "Couldn't register serial driver\n"); - return -ENOMEM; - } - - local_irq_save(flags); - - for(i=0;i<NR_PORTS;i++) { - - info = &m68k_soft[i]; - info->magic = SERIAL_MAGIC; - info->port = (int) &uart_addr[i]; - info->port.tty = NULL; - info->irq = uart_irqs[i]; - info->custom_divisor = 16; - info->close_delay = 50; - info->closing_wait = 3000; - info->x_char = 0; - info->event = 0; - info->count = 0; - info->blocked_open = 0; - INIT_WORK(&info->tqueue, do_softint); - INIT_WORK(&info->tqueue_hangup, do_serial_hangup); - init_waitqueue_head(&info->open_wait); - init_waitqueue_head(&info->close_wait); - info->line = i; - info->is_cons = 1; /* Means shortcuts work */ - - printk("%s%d at 0x%08x (irq = %d)", serial_driver->name, info->line, - info->port, info->irq); - printk(" is a builtin MC68328 UART\n"); - -#ifdef CONFIG_M68VZ328 - if (i > 0 ) - PJSEL &= 0xCF; /* PSW enable second port output */ -#endif - - if (request_irq(uart_irqs[i], - rs_interrupt, - IRQF_DISABLED, - "M68328_UART", info)) - panic("Unable to attach 68328 serial interrupt\n"); - } - local_irq_restore(flags); - return 0; -} - -module_init(rs68328_init); - - - -static void m68328_set_baud(void) -{ - unsigned short ustcnt; - int i; - - ustcnt = USTCNT; - USTCNT = ustcnt & ~USTCNT_TXEN; - -again: - for (i = 0; i < ARRAY_SIZE(baud_table); i++) - if (baud_table[i] == m68328_console_baud) - break; - if (i >= ARRAY_SIZE(baud_table)) { - m68328_console_baud = 9600; - goto again; - } - - UBAUD = PUT_FIELD(UBAUD_DIVIDE, hw_baud_table[i].divisor) | - PUT_FIELD(UBAUD_PRESCALER, hw_baud_table[i].prescale); - ustcnt &= ~(USTCNT_PARITYEN | USTCNT_ODD_EVEN | USTCNT_STOP | USTCNT_8_7); - ustcnt |= USTCNT_8_7; - ustcnt |= USTCNT_TXEN; - USTCNT = ustcnt; - m68328_console_initted = 1; - return; -} - - -int m68328_console_setup(struct console *cp, char *arg) -{ - int i, n = CONSOLE_BAUD_RATE; - - if (!cp) - return(-1); - - if (arg) - n = simple_strtoul(arg,NULL,0); - - for (i = 0; i < ARRAY_SIZE(baud_table); i++) - if (baud_table[i] == n) - break; - if (i < ARRAY_SIZE(baud_table)) { - m68328_console_baud = n; - m68328_console_cbaud = 0; - if (i > 15) { - m68328_console_cbaud |= CBAUDEX; - i -= 15; - } - m68328_console_cbaud |= i; - } - - m68328_set_baud(); /* make sure baud rate changes */ - return(0); -} - - -static struct tty_driver *m68328_console_device(struct console *c, int *index) -{ - *index = c->index; - return serial_driver; -} - - -void m68328_console_write (struct console *co, const char *str, - unsigned int count) -{ - if (!m68328_console_initted) - m68328_set_baud(); - while (count--) { - if (*str == '\n') - rs_put_char('\r'); - rs_put_char( *str++ ); - } -} - - -static struct console m68328_driver = { - .name = "ttyS", - .write = m68328_console_write, - .device = m68328_console_device, - .setup = m68328_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, -}; - - -static int __init m68328_console_init(void) -{ - register_console(&m68328_driver); - return 0; -} - -console_initcall(m68328_console_init); diff --git a/drivers/serial/68328serial.h b/drivers/serial/68328serial.h deleted file mode 100644 index 664ceb0a158c..000000000000 --- a/drivers/serial/68328serial.h +++ /dev/null @@ -1,188 +0,0 @@ -/* 68328serial.h: Definitions for the mc68328 serial driver. - * - * Copyright (C) 1995 David S. Miller <davem@caip.rutgers.edu> - * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> - * Copyright (C) 1998, 1999 D. Jeff Dionne <jeff@uclinux.org> - * Copyright (C) 1999 Vladimir Gurevich <vgurevic@cisco.com> - * - * VZ Support/Fixes Evan Stawnyczy <e@lineo.ca> - */ - -#ifndef _MC683XX_SERIAL_H -#define _MC683XX_SERIAL_H - - -struct serial_struct { - int type; - int line; - int port; - int irq; - int flags; - int xmit_fifo_size; - int custom_divisor; - int baud_base; - unsigned short close_delay; - char reserved_char[2]; - int hub6; /* FIXME: We don't have AT&T Hub6 boards! */ - unsigned short closing_wait; /* time to wait before closing */ - unsigned short closing_wait2; /* no longer used... */ - int reserved[4]; -}; - -/* - * For the close wait times, 0 means wait forever for serial port to - * flush its output. 65535 means don't wait at all. - */ -#define S_CLOSING_WAIT_INF 0 -#define S_CLOSING_WAIT_NONE 65535 - -/* - * Definitions for S_struct (and serial_struct) flags field - */ -#define S_HUP_NOTIFY 0x0001 /* Notify getty on hangups and closes - on the callout port */ -#define S_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */ -#define S_SAK 0x0004 /* Secure Attention Key (Orange book) */ -#define S_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */ - -#define S_SPD_MASK 0x0030 -#define S_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */ - -#define S_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */ -#define S_SPD_CUST 0x0030 /* Use user-specified divisor */ - -#define S_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */ -#define S_AUTO_IRQ 0x0080 /* Do automatic IRQ during autoconfiguration */ -#define S_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */ -#define S_PGRP_LOCKOUT 0x0200 /* Lock out cua opens based on pgrp */ -#define S_CALLOUT_NOHUP 0x0400 /* Don't do hangups for cua device */ - -#define S_FLAGS 0x0FFF /* Possible legal S flags */ -#define S_USR_MASK 0x0430 /* Legal flags that non-privileged - * users can set or reset */ - -/* Internal flags used only by kernel/chr_drv/serial.c */ -#define S_INITIALIZED 0x80000000 /* Serial port was initialized */ -#define S_CALLOUT_ACTIVE 0x40000000 /* Call out device is active */ -#define S_NORMAL_ACTIVE 0x20000000 /* Normal device is active */ -#define S_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */ -#define S_CLOSING 0x08000000 /* Serial port is closing */ -#define S_CTS_FLOW 0x04000000 /* Do CTS flow control */ -#define S_CHECK_CD 0x02000000 /* i.e., CLOCAL */ - -/* Software state per channel */ - -#ifdef __KERNEL__ - -/* - * I believe this is the optimal setting that reduces the number of interrupts. - * At high speeds the output might become a little "bursted" (use USTCNT_TXHE - * if that bothers you), but in most cases it will not, since we try to - * transmit characters every time rs_interrupt is called. Thus, quite often - * you'll see that a receive interrupt occures before the transmit one. - * -- Vladimir Gurevich - */ -#define USTCNT_TX_INTR_MASK (USTCNT_TXEE) - -/* - * 68328 and 68EZ328 UARTS are a little bit different. EZ328 has special - * "Old data interrupt" which occures whenever the data stay in the FIFO - * longer than 30 bits time. This allows us to use FIFO without compromising - * latency. '328 does not have this feature and without the real 328-based - * board I would assume that RXRE is the safest setting. - * - * For EZ328 I use RXHE (Half empty) interrupt to reduce the number of - * interrupts. RXFE (receive queue full) causes the system to lose data - * at least at 115200 baud - * - * If your board is busy doing other stuff, you might consider to use - * RXRE (data ready intrrupt) instead. - * - * The other option is to make these INTR masks run-time configurable, so - * that people can dynamically adapt them according to the current usage. - * -- Vladimir Gurevich - */ - -/* (es) */ -#if defined(CONFIG_M68EZ328) || defined(CONFIG_M68VZ328) -#define USTCNT_RX_INTR_MASK (USTCNT_RXHE | USTCNT_ODEN) -#elif defined(CONFIG_M68328) -#define USTCNT_RX_INTR_MASK (USTCNT_RXRE) -#else -#error Please, define the Rx interrupt events for your CPU -#endif -/* (/es) */ - -/* - * This is our internal structure for each serial port's state. - * - * Many fields are paralleled by the structure used by the serial_struct - * structure. - * - * For definitions of the flags field, see tty.h - */ - -struct m68k_serial { - char soft_carrier; /* Use soft carrier on this channel */ - char break_abort; /* Is serial console in, so process brk/abrt */ - char is_cons; /* Is this our console. */ - - /* We need to know the current clock divisor - * to read the bps rate the chip has currently - * loaded. - */ - unsigned char clk_divisor; /* May be 1, 16, 32, or 64 */ - int baud; - int magic; - int baud_base; - int port; - int irq; - int flags; /* defined in tty.h */ - int type; /* UART type */ - struct tty_struct *tty; - int read_status_mask; - int ignore_status_mask; - int timeout; - int xmit_fifo_size; - int custom_divisor; - int x_char; /* xon/xoff character */ - int close_delay; - unsigned short closing_wait; - unsigned short closing_wait2; - unsigned long event; - unsigned long last_active; - int line; - int count; /* # of fd on device */ - int blocked_open; /* # of blocked opens */ - unsigned char *xmit_buf; - int xmit_head; - int xmit_tail; - int xmit_cnt; - struct work_struct tqueue; - struct work_struct tqueue_hangup; - wait_queue_head_t open_wait; - wait_queue_head_t close_wait; -}; - - -#define SERIAL_MAGIC 0x5301 - -/* - * The size of the serial xmit buffer is 1 page, or 4096 bytes - */ -#define SERIAL_XMIT_SIZE 4096 - -/* - * Events are used to schedule things to happen at timer-interrupt - * time, instead of at rs interrupt time. - */ -#define RS_EVENT_WRITE_WAKEUP 0 - -/* - * Define the number of ports supported and their irqs. - */ -#define NR_PORTS 1 -#define UART_IRQ_DEFNS {UART_IRQ_NUM} - -#endif /* __KERNEL__ */ -#endif /* !(_MC683XX_SERIAL_H) */ diff --git a/drivers/serial/68360serial.c b/drivers/serial/68360serial.c deleted file mode 100644 index 88b13356ec10..000000000000 --- a/drivers/serial/68360serial.c +++ /dev/null @@ -1,2978 +0,0 @@ -/* - * UART driver for 68360 CPM SCC or SMC - * Copyright (c) 2000 D. Jeff Dionne <jeff@uclinux.org>, - * Copyright (c) 2000 Michael Leslie <mleslie@lineo.ca> - * Copyright (c) 1997 Dan Malek <dmalek@jlc.net> - * - * I used the serial.c driver as the framework for this driver. - * Give credit to those guys. - * The original code was written for the MBX860 board. I tried to make - * it generic, but there may be some assumptions in the structures that - * have to be fixed later. - * To save porting time, I did not bother to change any object names - * that are not accessed outside of this file. - * It still needs lots of work........When it was easy, I included code - * to support the SCCs, but this has never been tested, nor is it complete. - * Only the SCCs support modem control, so that is not complete either. - * - * This module exports the following rs232 io functions: - * - * int rs_360_init(void); - */ - -#include <linux/module.h> -#include <linux/errno.h> -#include <linux/signal.h> -#include <linux/sched.h> -#include <linux/timer.h> -#include <linux/interrupt.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial.h> -#include <linux/serialP.h> -#include <linux/major.h> -#include <linux/string.h> -#include <linux/fcntl.h> -#include <linux/ptrace.h> -#include <linux/mm.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <asm/irq.h> -#include <asm/m68360.h> -#include <asm/commproc.h> - - -#ifdef CONFIG_KGDB -extern void breakpoint(void); -extern void set_debug_traps(void); -extern int kgdb_output_string (const char* s, unsigned int count); -#endif - - -/* #ifdef CONFIG_SERIAL_CONSOLE */ /* This seems to be a post 2.0 thing - mles */ -#include <linux/console.h> -#include <linux/jiffies.h> - -/* this defines the index into rs_table for the port to use - */ -#ifndef CONFIG_SERIAL_CONSOLE_PORT -#define CONFIG_SERIAL_CONSOLE_PORT 1 /* ie SMC2 - note USE_SMC2 must be defined */ -#endif -/* #endif */ - -#if 0 -/* SCC2 for console - */ -#undef CONFIG_SERIAL_CONSOLE_PORT -#define CONFIG_SERIAL_CONSOLE_PORT 2 -#endif - - -#define TX_WAKEUP ASYNC_SHARE_IRQ - -static char *serial_name = "CPM UART driver"; -static char *serial_version = "0.03"; - -static struct tty_driver *serial_driver; -int serial_console_setup(struct console *co, char *options); - -/* - * Serial driver configuration section. Here are the various options: - */ -#define SERIAL_PARANOIA_CHECK -#define CONFIG_SERIAL_NOPAUSE_IO -#define SERIAL_DO_RESTART - -/* Set of debugging defines */ - -#undef SERIAL_DEBUG_INTR -#undef SERIAL_DEBUG_OPEN -#undef SERIAL_DEBUG_FLOW -#undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT - -#define _INLINE_ inline - -#define DBG_CNT(s) - -/* We overload some of the items in the data structure to meet our - * needs. For example, the port address is the CPM parameter ram - * offset for the SCC or SMC. The maximum number of ports is 4 SCCs and - * 2 SMCs. The "hub6" field is used to indicate the channel number, with - * a flag indicating SCC or SMC, and the number is used as an index into - * the CPM parameter area for this device. - * The "type" field is currently set to 0, for PORT_UNKNOWN. It is - * not currently used. I should probably use it to indicate the port - * type of SMC or SCC. - * The SMCs do not support any modem control signals. - */ -#define smc_scc_num hub6 -#define NUM_IS_SCC ((int)0x00010000) -#define PORT_NUM(P) ((P) & 0x0000ffff) - - -#if defined (CONFIG_UCQUICC) - -volatile extern void *_periph_base; -/* sipex transceiver - * mode bits for are on pins - * - * SCC2 d16..19 - * SCC3 d20..23 - * SCC4 d24..27 - */ -#define SIPEX_MODE(n,m) ((m & 0x0f)<<(16+4*(n-1))) - -static uint sipex_mode_bits = 0x00000000; - -#endif - -/* There is no `serial_state' defined back here in 2.0. - * Try to get by with serial_struct - */ -/* #define serial_state serial_struct */ - -/* 2.4 -> 2.0 portability problem: async_icount in 2.4 has a few - * extras: */ - -#if 0 -struct async_icount_24 { - __u32 cts, dsr, rng, dcd, tx, rx; - __u32 frame, parity, overrun, brk; - __u32 buf_overrun; -} icount; -#endif - -#if 0 - -struct serial_state { - int magic; - int baud_base; - unsigned long port; - int irq; - int flags; - int hub6; - int type; - int line; - int revision; /* Chip revision (950) */ - int xmit_fifo_size; - int custom_divisor; - int count; - u8 *iomem_base; - u16 iomem_reg_shift; - unsigned short close_delay; - unsigned short closing_wait; /* time to wait before closing */ - struct async_icount_24 icount; - int io_type; - struct async_struct *info; -}; -#endif - -#define SSTATE_MAGIC 0x5302 - - - -/* SMC2 is sometimes used for low performance TDM interfaces. Define - * this as 1 if you want SMC2 as a serial port UART managed by this driver. - * Define this as 0 if you wish to use SMC2 for something else. - */ -#define USE_SMC2 1 - -#if 0 -/* Define SCC to ttySx mapping. */ -#define SCC_NUM_BASE (USE_SMC2 + 1) /* SCC base tty "number" */ - -/* Define which SCC is the first one to use for a serial port. These - * are 0-based numbers, i.e. this assumes the first SCC (SCC1) is used - * for Ethernet, and the first available SCC for serial UART is SCC2. - * NOTE: IF YOU CHANGE THIS, you have to change the PROFF_xxx and - * interrupt vectors in the table below to match. - */ -#define SCC_IDX_BASE 1 /* table index */ -#endif - - -/* Processors other than the 860 only get SMCs configured by default. - * Either they don't have SCCs or they are allocated somewhere else. - * Of course, there are now 860s without some SCCs, so we will need to - * address that someday. - * The Embedded Planet Multimedia I/O cards use TDM interfaces to the - * stereo codec parts, and we use SMC2 to help support that. - */ -static struct serial_state rs_table[] = { -/* type line PORT IRQ FLAGS smc_scc_num (F.K.A. hub6) */ - { 0, 0, PRSLOT_SMC1, CPMVEC_SMC1, 0, 0 } /* SMC1 ttyS0 */ -#if USE_SMC2 - ,{ 0, 0, PRSLOT_SMC2, CPMVEC_SMC2, 0, 1 } /* SMC2 ttyS1 */ -#endif - -#if defined(CONFIG_SERIAL_68360_SCC) - ,{ 0, 0, PRSLOT_SCC2, CPMVEC_SCC2, 0, (NUM_IS_SCC | 1) } /* SCC2 ttyS2 */ - ,{ 0, 0, PRSLOT_SCC3, CPMVEC_SCC3, 0, (NUM_IS_SCC | 2) } /* SCC3 ttyS3 */ - ,{ 0, 0, PRSLOT_SCC4, CPMVEC_SCC4, 0, (NUM_IS_SCC | 3) } /* SCC4 ttyS4 */ -#endif -}; - -#define NR_PORTS (sizeof(rs_table)/sizeof(struct serial_state)) - -/* The number of buffer descriptors and their sizes. - */ -#define RX_NUM_FIFO 4 -#define RX_BUF_SIZE 32 -#define TX_NUM_FIFO 4 -#define TX_BUF_SIZE 32 - -#define CONSOLE_NUM_FIFO 2 -#define CONSOLE_BUF_SIZE 4 - -char *console_fifos[CONSOLE_NUM_FIFO * CONSOLE_BUF_SIZE]; - -/* The async_struct in serial.h does not really give us what we - * need, so define our own here. - */ -typedef struct serial_info { - int magic; - int flags; - - struct serial_state *state; - /* struct serial_struct *state; */ - /* struct async_struct *state; */ - - struct tty_struct *tty; - int read_status_mask; - int ignore_status_mask; - int timeout; - int line; - int x_char; /* xon/xoff character */ - int close_delay; - unsigned short closing_wait; - unsigned short closing_wait2; - unsigned long event; - unsigned long last_active; - int blocked_open; /* # of blocked opens */ - struct work_struct tqueue; - struct work_struct tqueue_hangup; - wait_queue_head_t open_wait; - wait_queue_head_t close_wait; - - -/* CPM Buffer Descriptor pointers. - */ - QUICC_BD *rx_bd_base; - QUICC_BD *rx_cur; - QUICC_BD *tx_bd_base; - QUICC_BD *tx_cur; -} ser_info_t; - - -/* since kmalloc_init() does not get called until much after this initialization: */ -static ser_info_t quicc_ser_info[NR_PORTS]; -static char rx_buf_pool[NR_PORTS * RX_NUM_FIFO * RX_BUF_SIZE]; -static char tx_buf_pool[NR_PORTS * TX_NUM_FIFO * TX_BUF_SIZE]; - -static void change_speed(ser_info_t *info); -static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout); - -static inline int serial_paranoia_check(ser_info_t *info, - char *name, const char *routine) -{ -#ifdef SERIAL_PARANOIA_CHECK - static const char *badmagic = - "Warning: bad magic number for serial struct (%s) in %s\n"; - static const char *badinfo = - "Warning: null async_struct for (%s) in %s\n"; - - if (!info) { - printk(badinfo, name, routine); - return 1; - } - if (info->magic != SERIAL_MAGIC) { - printk(badmagic, name, routine); - return 1; - } -#endif - return 0; -} - -/* - * This is used to figure out the divisor speeds and the timeouts, - * indexed by the termio value. The generic CPM functions are responsible - * for setting and assigning baud rate generators for us. - */ -static int baud_table[] = { - 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, - 9600, 19200, 38400, 57600, 115200, 230400, 460800, 0 }; - -/* This sucks. There is a better way: */ -#if defined(CONFIG_CONSOLE_9600) - #define CONSOLE_BAUDRATE 9600 -#elif defined(CONFIG_CONSOLE_19200) - #define CONSOLE_BAUDRATE 19200 -#elif defined(CONFIG_CONSOLE_115200) - #define CONSOLE_BAUDRATE 115200 -#else - #warning "console baud rate undefined" - #define CONSOLE_BAUDRATE 9600 -#endif - -/* - * ------------------------------------------------------------ - * rs_stop() and rs_start() - * - * This routines are called before setting or resetting tty->stopped. - * They enable or disable transmitter interrupts, as necessary. - * ------------------------------------------------------------ - */ -static void rs_360_stop(struct tty_struct *tty) -{ - ser_info_t *info = (ser_info_t *)tty->driver_data; - int idx; - unsigned long flags; - volatile struct scc_regs *sccp; - volatile struct smc_regs *smcp; - - if (serial_paranoia_check(info, tty->name, "rs_stop")) - return; - - local_irq_save(flags); - idx = PORT_NUM(info->state->smc_scc_num); - if (info->state->smc_scc_num & NUM_IS_SCC) { - sccp = &pquicc->scc_regs[idx]; - sccp->scc_sccm &= ~UART_SCCM_TX; - } else { - /* smcp = &cpmp->cp_smc[idx]; */ - smcp = &pquicc->smc_regs[idx]; - smcp->smc_smcm &= ~SMCM_TX; - } - local_irq_restore(flags); -} - - -static void rs_360_start(struct tty_struct *tty) -{ - ser_info_t *info = (ser_info_t *)tty->driver_data; - int idx; - unsigned long flags; - volatile struct scc_regs *sccp; - volatile struct smc_regs *smcp; - - if (serial_paranoia_check(info, tty->name, "rs_stop")) - return; - - local_irq_save(flags); - idx = PORT_NUM(info->state->smc_scc_num); - if (info->state->smc_scc_num & NUM_IS_SCC) { - sccp = &pquicc->scc_regs[idx]; - sccp->scc_sccm |= UART_SCCM_TX; - } else { - smcp = &pquicc->smc_regs[idx]; - smcp->smc_smcm |= SMCM_TX; - } - local_irq_restore(flags); -} - -/* - * ---------------------------------------------------------------------- - * - * Here starts the interrupt handling routines. All of the following - * subroutines are declared as inline and are folded into - * rs_interrupt(). They were separated out for readability's sake. - * - * Note: rs_interrupt() is a "fast" interrupt, which means that it - * runs with interrupts turned off. People who may want to modify - * rs_interrupt() should try to keep the interrupt handler as fast as - * possible. After you are done making modifications, it is not a bad - * idea to do: - * - * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c - * - * and look at the resulting assemble code in serial.s. - * - * - Ted Ts'o (tytso@mit.edu), 7-Mar-93 - * ----------------------------------------------------------------------- - */ - -static _INLINE_ void receive_chars(ser_info_t *info) -{ - struct tty_struct *tty = info->port.tty; - unsigned char ch, flag, *cp; - /*int ignored = 0;*/ - int i; - ushort status; - struct async_icount *icount; - /* struct async_icount_24 *icount; */ - volatile QUICC_BD *bdp; - - icount = &info->state->icount; - - /* Just loop through the closed BDs and copy the characters into - * the buffer. - */ - bdp = info->rx_cur; - for (;;) { - if (bdp->status & BD_SC_EMPTY) /* If this one is empty */ - break; /* we are all done */ - - /* The read status mask tell us what we should do with - * incoming characters, especially if errors occur. - * One special case is the use of BD_SC_EMPTY. If - * this is not set, we are supposed to be ignoring - * inputs. In this case, just mark the buffer empty and - * continue. - */ - if (!(info->read_status_mask & BD_SC_EMPTY)) { - bdp->status |= BD_SC_EMPTY; - bdp->status &= - ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV); - - if (bdp->status & BD_SC_WRAP) - bdp = info->rx_bd_base; - else - bdp++; - continue; - } - - /* Get the number of characters and the buffer pointer. - */ - i = bdp->length; - /* cp = (unsigned char *)__va(bdp->buf); */ - cp = (char *)bdp->buf; - status = bdp->status; - - while (i-- > 0) { - ch = *cp++; - icount->rx++; - -#ifdef SERIAL_DEBUG_INTR - printk("DR%02x:%02x...", ch, status); -#endif - flag = TTY_NORMAL; - - if (status & (BD_SC_BR | BD_SC_FR | - BD_SC_PR | BD_SC_OV)) { - /* - * For statistics only - */ - if (status & BD_SC_BR) - icount->brk++; - else if (status & BD_SC_PR) - icount->parity++; - else if (status & BD_SC_FR) - icount->frame++; - if (status & BD_SC_OV) - icount->overrun++; - - /* - * Now check to see if character should be - * ignored, and mask off conditions which - * should be ignored. - if (status & info->ignore_status_mask) { - if (++ignored > 100) - break; - continue; - } - */ - status &= info->read_status_mask; - - if (status & (BD_SC_BR)) { -#ifdef SERIAL_DEBUG_INTR - printk("handling break...."); -#endif - *tty->flip.flag_buf_ptr = TTY_BREAK; - if (info->flags & ASYNC_SAK) - do_SAK(tty); - } else if (status & BD_SC_PR) - flag = TTY_PARITY; - else if (status & BD_SC_FR) - flag = TTY_FRAME; - } - tty_insert_flip_char(tty, ch, flag); - if (status & BD_SC_OV) - /* - * Overrun is special, since it's - * reported immediately, and doesn't - * affect the current character - */ - tty_insert_flip_char(tty, 0, TTY_OVERRUN); - } - - /* This BD is ready to be used again. Clear status. - * Get next BD. - */ - bdp->status |= BD_SC_EMPTY; - bdp->status &= ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV); - - if (bdp->status & BD_SC_WRAP) - bdp = info->rx_bd_base; - else - bdp++; - } - - info->rx_cur = (QUICC_BD *)bdp; - - tty_schedule_flip(tty); -} - -static _INLINE_ void receive_break(ser_info_t *info) -{ - struct tty_struct *tty = info->port.tty; - - info->state->icount.brk++; - /* Check to see if there is room in the tty buffer for - * the break. If not, we exit now, losing the break. FIXME - */ - tty_insert_flip_char(tty, 0, TTY_BREAK); - tty_schedule_flip(tty); -} - -static _INLINE_ void transmit_chars(ser_info_t *info) -{ - - if ((info->flags & TX_WAKEUP) || - (info->port.tty->flags & (1 << TTY_DO_WRITE_WAKEUP))) { - schedule_work(&info->tqueue); - } - -#ifdef SERIAL_DEBUG_INTR - printk("THRE..."); -#endif -} - -#ifdef notdef - /* I need to do this for the SCCs, so it is left as a reminder. - */ -static _INLINE_ void check_modem_status(struct async_struct *info) -{ - int status; - /* struct async_icount *icount; */ - struct async_icount_24 *icount; - - status = serial_in(info, UART_MSR); - - if (status & UART_MSR_ANY_DELTA) { - icount = &info->state->icount; - /* update input line counters */ - if (status & UART_MSR_TERI) - icount->rng++; - if (status & UART_MSR_DDSR) - icount->dsr++; - if (status & UART_MSR_DDCD) { - icount->dcd++; -#ifdef CONFIG_HARD_PPS - if ((info->flags & ASYNC_HARDPPS_CD) && - (status & UART_MSR_DCD)) - hardpps(); -#endif - } - if (status & UART_MSR_DCTS) - icount->cts++; - wake_up_interruptible(&info->delta_msr_wait); - } - - if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) { -#if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR)) - printk("ttys%d CD now %s...", info->line, - (status & UART_MSR_DCD) ? "on" : "off"); -#endif - if (status & UART_MSR_DCD) - wake_up_interruptible(&info->open_wait); - else { -#ifdef SERIAL_DEBUG_OPEN - printk("scheduling hangup..."); -#endif - queue_task(&info->tqueue_hangup, - &tq_scheduler); - } - } - if (info->flags & ASYNC_CTS_FLOW) { - if (info->port.tty->hw_stopped) { - if (status & UART_MSR_CTS) { -#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW)) - printk("CTS tx start..."); -#endif - info->port.tty->hw_stopped = 0; - info->IER |= UART_IER_THRI; - serial_out(info, UART_IER, info->IER); - rs_sched_event(info, RS_EVENT_WRITE_WAKEUP); - return; - } - } else { - if (!(status & UART_MSR_CTS)) { -#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW)) - printk("CTS tx stop..."); -#endif - info->port.tty->hw_stopped = 1; - info->IER &= ~UART_IER_THRI; - serial_out(info, UART_IER, info->IER); - } - } - } -} -#endif - -/* - * This is the serial driver's interrupt routine for a single port - */ -/* static void rs_360_interrupt(void *dev_id) */ /* until and if we start servicing irqs here */ -static void rs_360_interrupt(int vec, void *dev_id) -{ - u_char events; - int idx; - ser_info_t *info; - volatile struct smc_regs *smcp; - volatile struct scc_regs *sccp; - - info = dev_id; - - idx = PORT_NUM(info->state->smc_scc_num); - if (info->state->smc_scc_num & NUM_IS_SCC) { - sccp = &pquicc->scc_regs[idx]; - events = sccp->scc_scce; - if (events & SCCM_RX) - receive_chars(info); - if (events & SCCM_TX) - transmit_chars(info); - sccp->scc_scce = events; - } else { - smcp = &pquicc->smc_regs[idx]; - events = smcp->smc_smce; - if (events & SMCM_BRKE) - receive_break(info); - if (events & SMCM_RX) - receive_chars(info); - if (events & SMCM_TX) - transmit_chars(info); - smcp->smc_smce = events; - } - -#ifdef SERIAL_DEBUG_INTR - printk("rs_interrupt_single(%d, %x)...", - info->state->smc_scc_num, events); -#endif -#ifdef modem_control - check_modem_status(info); -#endif - info->last_active = jiffies; -#ifdef SERIAL_DEBUG_INTR - printk("end.\n"); -#endif -} - - -/* - * ------------------------------------------------------------------- - * Here ends the serial interrupt routines. - * ------------------------------------------------------------------- - */ - - -static void do_softint(void *private_) -{ - ser_info_t *info = (ser_info_t *) private_; - struct tty_struct *tty; - - tty = info->port.tty; - if (!tty) - return; - - if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) - tty_wakeup(tty); -} - - -/* - * This routine is called from the scheduler tqueue when the interrupt - * routine has signalled that a hangup has occurred. The path of - * hangup processing is: - * - * serial interrupt routine -> (scheduler tqueue) -> - * do_serial_hangup() -> tty->hangup() -> rs_hangup() - * - */ -static void do_serial_hangup(void *private_) -{ - struct async_struct *info = (struct async_struct *) private_; - struct tty_struct *tty; - - tty = info->port.tty; - if (!tty) - return; - - tty_hangup(tty); -} - - -static int startup(ser_info_t *info) -{ - unsigned long flags; - int retval=0; - int idx; - /*struct serial_state *state = info->state;*/ - volatile struct smc_regs *smcp; - volatile struct scc_regs *sccp; - volatile struct smc_uart_pram *up; - volatile struct uart_pram *scup; - - - local_irq_save(flags); - - if (info->flags & ASYNC_INITIALIZED) { - goto errout; - } - -#ifdef maybe - if (!state->port || !state->type) { - if (info->port.tty) - set_bit(TTY_IO_ERROR, &info->port.tty->flags); - goto errout; - } -#endif - -#ifdef SERIAL_DEBUG_OPEN - printk("starting up ttys%d (irq %d)...", info->line, state->irq); -#endif - - -#ifdef modem_control - info->MCR = 0; - if (info->port.tty->termios->c_cflag & CBAUD) - info->MCR = UART_MCR_DTR | UART_MCR_RTS; -#endif - - if (info->port.tty) - clear_bit(TTY_IO_ERROR, &info->port.tty->flags); - - /* - * and set the speed of the serial port - */ - change_speed(info); - - idx = PORT_NUM(info->state->smc_scc_num); - if (info->state->smc_scc_num & NUM_IS_SCC) { - sccp = &pquicc->scc_regs[idx]; - scup = &pquicc->pram[info->state->port].scc.pscc.u; - - scup->mrblr = RX_BUF_SIZE; - scup->max_idl = RX_BUF_SIZE; - - sccp->scc_sccm |= (UART_SCCM_TX | UART_SCCM_RX); - sccp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT); - - } else { - smcp = &pquicc->smc_regs[idx]; - - /* Enable interrupts and I/O. - */ - smcp->smc_smcm |= (SMCM_RX | SMCM_TX); - smcp->smc_smcmr |= (SMCMR_REN | SMCMR_TEN); - - /* We can tune the buffer length and idle characters - * to take advantage of the entire incoming buffer size. - * If mrblr is something other than 1, maxidl has to be - * non-zero or we never get an interrupt. The maxidl - * is the number of character times we wait after reception - * of the last character before we decide no more characters - * are coming. - */ - /* up = (smc_uart_t *)&pquicc->cp_dparam[state->port]; */ - /* holy unionized structures, Batman: */ - up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u; - - up->mrblr = RX_BUF_SIZE; - up->max_idl = RX_BUF_SIZE; - - up->brkcr = 1; /* number of break chars */ - } - - info->flags |= ASYNC_INITIALIZED; - local_irq_restore(flags); - return 0; - -errout: - local_irq_restore(flags); - return retval; -} - -/* - * This routine will shutdown a serial port; interrupts are disabled, and - * DTR is dropped if the hangup on close termio flag is on. - */ -static void shutdown(ser_info_t *info) -{ - unsigned long flags; - struct serial_state *state; - int idx; - volatile struct smc_regs *smcp; - volatile struct scc_regs *sccp; - - if (!(info->flags & ASYNC_INITIALIZED)) - return; - - state = info->state; - -#ifdef SERIAL_DEBUG_OPEN - printk("Shutting down serial port %d (irq %d)....", info->line, - state->irq); -#endif - - local_irq_save(flags); - - idx = PORT_NUM(state->smc_scc_num); - if (state->smc_scc_num & NUM_IS_SCC) { - sccp = &pquicc->scc_regs[idx]; - sccp->scc_gsmr.w.low &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT); -#ifdef CONFIG_SERIAL_CONSOLE - /* We can't disable the transmitter if this is the - * system console. - */ - if ((state - rs_table) != CONFIG_SERIAL_CONSOLE_PORT) -#endif - sccp->scc_sccm &= ~(UART_SCCM_TX | UART_SCCM_RX); - } else { - smcp = &pquicc->smc_regs[idx]; - - /* Disable interrupts and I/O. - */ - smcp->smc_smcm &= ~(SMCM_RX | SMCM_TX); -#ifdef CONFIG_SERIAL_CONSOLE - /* We can't disable the transmitter if this is the - * system console. - */ - if ((state - rs_table) != CONFIG_SERIAL_CONSOLE_PORT) -#endif - smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN); - } - - if (info->port.tty) - set_bit(TTY_IO_ERROR, &info->port.tty->flags); - - info->flags &= ~ASYNC_INITIALIZED; - local_irq_restore(flags); -} - -/* - * This routine is called to set the UART divisor registers to match - * the specified baud rate for a serial port. - */ -static void change_speed(ser_info_t *info) -{ - int baud_rate; - unsigned cflag, cval, scval, prev_mode; - int i, bits, sbits, idx; - unsigned long flags; - struct serial_state *state; - volatile struct smc_regs *smcp; - volatile struct scc_regs *sccp; - - if (!info->port.tty || !info->port.tty->termios) - return; - cflag = info->port.tty->termios->c_cflag; - - state = info->state; - - /* Character length programmed into the mode register is the - * sum of: 1 start bit, number of data bits, 0 or 1 parity bit, - * 1 or 2 stop bits, minus 1. - * The value 'bits' counts this for us. - */ - cval = 0; - scval = 0; - - /* byte size and parity */ - switch (cflag & CSIZE) { - case CS5: bits = 5; break; - case CS6: bits = 6; break; - case CS7: bits = 7; break; - case CS8: bits = 8; break; - /* Never happens, but GCC is too dumb to figure it out */ - default: bits = 8; break; - } - sbits = bits - 5; - - if (cflag & CSTOPB) { - cval |= SMCMR_SL; /* Two stops */ - scval |= SCU_PMSR_SL; - bits++; - } - if (cflag & PARENB) { - cval |= SMCMR_PEN; - scval |= SCU_PMSR_PEN; - bits++; - } - if (!(cflag & PARODD)) { - cval |= SMCMR_PM_EVEN; - scval |= (SCU_PMSR_REVP | SCU_PMSR_TEVP); - } - - /* Determine divisor based on baud rate */ - i = cflag & CBAUD; - if (i >= (sizeof(baud_table)/sizeof(int))) - baud_rate = 9600; - else - baud_rate = baud_table[i]; - - info->timeout = (TX_BUF_SIZE*HZ*bits); - info->timeout += HZ/50; /* Add .02 seconds of slop */ - -#ifdef modem_control - /* CTS flow control flag and modem status interrupts */ - info->IER &= ~UART_IER_MSI; - if (info->flags & ASYNC_HARDPPS_CD) - info->IER |= UART_IER_MSI; - if (cflag & CRTSCTS) { - info->flags |= ASYNC_CTS_FLOW; - info->IER |= UART_IER_MSI; - } else - info->flags &= ~ASYNC_CTS_FLOW; - if (cflag & CLOCAL) - info->flags &= ~ASYNC_CHECK_CD; - else { - info->flags |= ASYNC_CHECK_CD; - info->IER |= UART_IER_MSI; - } - serial_out(info, UART_IER, info->IER); -#endif - - /* - * Set up parity check flag - */ - info->read_status_mask = (BD_SC_EMPTY | BD_SC_OV); - if (I_INPCK(info->port.tty)) - info->read_status_mask |= BD_SC_FR | BD_SC_PR; - if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty)) - info->read_status_mask |= BD_SC_BR; - - /* - * Characters to ignore - */ - info->ignore_status_mask = 0; - if (I_IGNPAR(info->port.tty)) - info->ignore_status_mask |= BD_SC_PR | BD_SC_FR; - if (I_IGNBRK(info->port.tty)) { - info->ignore_status_mask |= BD_SC_BR; - /* - * If we're ignore parity and break indicators, ignore - * overruns too. (For real raw support). - */ - if (I_IGNPAR(info->port.tty)) - info->ignore_status_mask |= BD_SC_OV; - } - /* - * !!! ignore all characters if CREAD is not set - */ - if ((cflag & CREAD) == 0) - info->read_status_mask &= ~BD_SC_EMPTY; - local_irq_save(flags); - - /* Start bit has not been added (so don't, because we would just - * subtract it later), and we need to add one for the number of - * stops bits (there is always at least one). - */ - bits++; - idx = PORT_NUM(state->smc_scc_num); - if (state->smc_scc_num & NUM_IS_SCC) { - sccp = &pquicc->scc_regs[idx]; - sccp->scc_psmr = (sbits << 12) | scval; - } else { - smcp = &pquicc->smc_regs[idx]; - - /* Set the mode register. We want to keep a copy of the - * enables, because we want to put them back if they were - * present. - */ - prev_mode = smcp->smc_smcmr; - smcp->smc_smcmr = smcr_mk_clen(bits) | cval | SMCMR_SM_UART; - smcp->smc_smcmr |= (prev_mode & (SMCMR_REN | SMCMR_TEN)); - } - - m360_cpm_setbrg((state - rs_table), baud_rate); - - local_irq_restore(flags); -} - -static void rs_360_put_char(struct tty_struct *tty, unsigned char ch) -{ - ser_info_t *info = (ser_info_t *)tty->driver_data; - volatile QUICC_BD *bdp; - - if (serial_paranoia_check(info, tty->name, "rs_put_char")) - return 0; - - if (!tty) - return 0; - - bdp = info->tx_cur; - while (bdp->status & BD_SC_READY); - - /* *((char *)__va(bdp->buf)) = ch; */ - *((char *)bdp->buf) = ch; - bdp->length = 1; - bdp->status |= BD_SC_READY; - - /* Get next BD. - */ - if (bdp->status & BD_SC_WRAP) - bdp = info->tx_bd_base; - else - bdp++; - - info->tx_cur = (QUICC_BD *)bdp; - return 1; - -} - -static int rs_360_write(struct tty_struct * tty, - const unsigned char *buf, int count) -{ - int c, ret = 0; - ser_info_t *info = (ser_info_t *)tty->driver_data; - volatile QUICC_BD *bdp; - -#ifdef CONFIG_KGDB - /* Try to let stub handle output. Returns true if it did. */ - if (kgdb_output_string(buf, count)) - return ret; -#endif - - if (serial_paranoia_check(info, tty->name, "rs_write")) - return 0; - - if (!tty) - return 0; - - bdp = info->tx_cur; - - while (1) { - c = min(count, TX_BUF_SIZE); - - if (c <= 0) - break; - - if (bdp->status & BD_SC_READY) { - info->flags |= TX_WAKEUP; - break; - } - - /* memcpy(__va(bdp->buf), buf, c); */ - memcpy((void *)bdp->buf, buf, c); - - bdp->length = c; - bdp->status |= BD_SC_READY; - - buf += c; - count -= c; - ret += c; - - /* Get next BD. - */ - if (bdp->status & BD_SC_WRAP) - bdp = info->tx_bd_base; - else - bdp++; - info->tx_cur = (QUICC_BD *)bdp; - } - return ret; -} - -static int rs_360_write_room(struct tty_struct *tty) -{ - ser_info_t *info = (ser_info_t *)tty->driver_data; - int ret; - - if (serial_paranoia_check(info, tty->name, "rs_write_room")) - return 0; - - if ((info->tx_cur->status & BD_SC_READY) == 0) { - info->flags &= ~TX_WAKEUP; - ret = TX_BUF_SIZE; - } - else { - info->flags |= TX_WAKEUP; - ret = 0; - } - return ret; -} - -/* I could track this with transmit counters....maybe later. -*/ -static int rs_360_chars_in_buffer(struct tty_struct *tty) -{ - ser_info_t *info = (ser_info_t *)tty->driver_data; - - if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer")) - return 0; - return 0; -} - -static void rs_360_flush_buffer(struct tty_struct *tty) -{ - ser_info_t *info = (ser_info_t *)tty->driver_data; - - if (serial_paranoia_check(info, tty->name, "rs_flush_buffer")) - return; - - /* There is nothing to "flush", whatever we gave the CPM - * is on its way out. - */ - tty_wakeup(tty); - info->flags &= ~TX_WAKEUP; -} - -/* - * This function is used to send a high-priority XON/XOFF character to - * the device - */ -static void rs_360_send_xchar(struct tty_struct *tty, char ch) -{ - volatile QUICC_BD *bdp; - - ser_info_t *info = (ser_info_t *)tty->driver_data; - - if (serial_paranoia_check(info, tty->name, "rs_send_char")) - return; - - bdp = info->tx_cur; - while (bdp->status & BD_SC_READY); - - /* *((char *)__va(bdp->buf)) = ch; */ - *((char *)bdp->buf) = ch; - bdp->length = 1; - bdp->status |= BD_SC_READY; - - /* Get next BD. - */ - if (bdp->status & BD_SC_WRAP) - bdp = info->tx_bd_base; - else - bdp++; - - info->tx_cur = (QUICC_BD *)bdp; -} - -/* - * ------------------------------------------------------------ - * rs_throttle() - * - * This routine is called by the upper-layer tty layer to signal that - * incoming characters should be throttled. - * ------------------------------------------------------------ - */ -static void rs_360_throttle(struct tty_struct * tty) -{ - ser_info_t *info = (ser_info_t *)tty->driver_data; -#ifdef SERIAL_DEBUG_THROTTLE - char buf[64]; - - printk("throttle %s: %d....\n", _tty_name(tty, buf), - tty->ldisc.chars_in_buffer(tty)); -#endif - - if (serial_paranoia_check(info, tty->name, "rs_throttle")) - return; - - if (I_IXOFF(tty)) - rs_360_send_xchar(tty, STOP_CHAR(tty)); - -#ifdef modem_control - if (tty->termios->c_cflag & CRTSCTS) - info->MCR &= ~UART_MCR_RTS; - - local_irq_disable(); - serial_out(info, UART_MCR, info->MCR); - local_irq_enable(); -#endif -} - -static void rs_360_unthrottle(struct tty_struct * tty) -{ - ser_info_t *info = (ser_info_t *)tty->driver_data; -#ifdef SERIAL_DEBUG_THROTTLE - char buf[64]; - - printk("unthrottle %s: %d....\n", _tty_name(tty, buf), - tty->ldisc.chars_in_buffer(tty)); -#endif - - if (serial_paranoia_check(info, tty->name, "rs_unthrottle")) - return; - - if (I_IXOFF(tty)) { - if (info->x_char) - info->x_char = 0; - else - rs_360_send_xchar(tty, START_CHAR(tty)); - } -#ifdef modem_control - if (tty->termios->c_cflag & CRTSCTS) - info->MCR |= UART_MCR_RTS; - local_irq_disable(); - serial_out(info, UART_MCR, info->MCR); - local_irq_enable(); -#endif -} - -/* - * ------------------------------------------------------------ - * rs_ioctl() and friends - * ------------------------------------------------------------ - */ - -#ifdef maybe -/* - * get_lsr_info - get line status register info - * - * Purpose: Let user call ioctl() to get info when the UART physically - * is emptied. On bus types like RS485, the transmitter must - * release the bus after transmitting. This must be done when - * the transmit shift register is empty, not be done when the - * transmit holding register is empty. This functionality - * allows an RS485 driver to be written in user space. - */ -static int get_lsr_info(struct async_struct * info, unsigned int *value) -{ - unsigned char status; - unsigned int result; - - local_irq_disable(); - status = serial_in(info, UART_LSR); - local_irq_enable(); - result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0); - return put_user(result,value); -} -#endif - -static int rs_360_tiocmget(struct tty_struct *tty, struct file *file) -{ - ser_info_t *info = (ser_info_t *)tty->driver_data; - unsigned int result = 0; -#ifdef modem_control - unsigned char control, status; - - if (serial_paranoia_check(info, tty->name, __func__)) - return -ENODEV; - - if (tty->flags & (1 << TTY_IO_ERROR)) - return -EIO; - - control = info->MCR; - local_irq_disable(); - status = serial_in(info, UART_MSR); - local_irq_enable(); - result = ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) - | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) -#ifdef TIOCM_OUT1 - | ((control & UART_MCR_OUT1) ? TIOCM_OUT1 : 0) - | ((control & UART_MCR_OUT2) ? TIOCM_OUT2 : 0) -#endif - | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) - | ((status & UART_MSR_RI) ? TIOCM_RNG : 0) - | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) - | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0); -#endif - return result; -} - -static int rs_360_tiocmset(struct tty_struct *tty, struct file *file, - unsigned int set, unsigned int clear) -{ -#ifdef modem_control - ser_info_t *info = (ser_info_t *)tty->driver_data; - unsigned int arg; - - if (serial_paranoia_check(info, tty->name, __func__)) - return -ENODEV; - - if (tty->flags & (1 << TTY_IO_ERROR)) - return -EIO; - /* FIXME: locking on info->mcr */ - if (set & TIOCM_RTS) - info->mcr |= UART_MCR_RTS; - if (set & TIOCM_DTR) - info->mcr |= UART_MCR_DTR; - if (clear & TIOCM_RTS) - info->MCR &= ~UART_MCR_RTS; - if (clear & TIOCM_DTR) - info->MCR &= ~UART_MCR_DTR; - -#ifdef TIOCM_OUT1 - if (set & TIOCM_OUT1) - info->MCR |= UART_MCR_OUT1; - if (set & TIOCM_OUT2) - info->MCR |= UART_MCR_OUT2; - if (clear & TIOCM_OUT1) - info->MCR &= ~UART_MCR_OUT1; - if (clear & TIOCM_OUT2) - info->MCR &= ~UART_MCR_OUT2; -#endif - - local_irq_disable(); - serial_out(info, UART_MCR, info->MCR); - local_irq_enable(); -#endif - return 0; -} - -/* Sending a break is a two step process on the SMC/SCC. It is accomplished - * by sending a STOP TRANSMIT command followed by a RESTART TRANSMIT - * command. We take advantage of the begin/end functions to make this - * happen. - */ -static ushort smc_chan_map[] = { - CPM_CR_CH_SMC1, - CPM_CR_CH_SMC2 -}; - -static ushort scc_chan_map[] = { - CPM_CR_CH_SCC1, - CPM_CR_CH_SCC2, - CPM_CR_CH_SCC3, - CPM_CR_CH_SCC4 -}; - -static void begin_break(ser_info_t *info) -{ - volatile QUICC *cp; - ushort chan; - int idx; - - cp = pquicc; - - idx = PORT_NUM(info->state->smc_scc_num); - if (info->state->smc_scc_num & NUM_IS_SCC) - chan = scc_chan_map[idx]; - else - chan = smc_chan_map[idx]; - - cp->cp_cr = mk_cr_cmd(chan, CPM_CR_STOP_TX) | CPM_CR_FLG; - while (cp->cp_cr & CPM_CR_FLG); -} - -static void end_break(ser_info_t *info) -{ - volatile QUICC *cp; - ushort chan; - int idx; - - cp = pquicc; - - idx = PORT_NUM(info->state->smc_scc_num); - if (info->state->smc_scc_num & NUM_IS_SCC) - chan = scc_chan_map[idx]; - else - chan = smc_chan_map[idx]; - - cp->cp_cr = mk_cr_cmd(chan, CPM_CR_RESTART_TX) | CPM_CR_FLG; - while (cp->cp_cr & CPM_CR_FLG); -} - -/* - * This routine sends a break character out the serial port. - */ -static void send_break(ser_info_t *info, unsigned int duration) -{ -#ifdef SERIAL_DEBUG_SEND_BREAK - printk("rs_send_break(%d) jiff=%lu...", duration, jiffies); -#endif - begin_break(info); - msleep_interruptible(duration); - end_break(info); -#ifdef SERIAL_DEBUG_SEND_BREAK - printk("done jiffies=%lu\n", jiffies); -#endif -} - - -/* - * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) - * Return: write counters to the user passed counter struct - * NB: both 1->0 and 0->1 transitions are counted except for - * RI where only 0->1 is counted. - */ -static int rs_360_get_icount(struct tty_struct *tty, - struct serial_icounter_struct *icount) -{ - ser_info_t *info = (ser_info_t *)tty->driver_data; - struct async_icount cnow; - - local_irq_disable(); - cnow = info->state->icount; - local_irq_enable(); - - icount->cts = cnow.cts; - icount->dsr = cnow.dsr; - icount->rng = cnow.rng; - icount->dcd = cnow.dcd; - - return 0; -} - -static int rs_360_ioctl(struct tty_struct *tty, struct file * file, - unsigned int cmd, unsigned long arg) -{ - int error; - ser_info_t *info = (ser_info_t *)tty->driver_data; - int retval; - struct async_icount cnow; - /* struct async_icount_24 cnow;*/ /* kernel counter temps */ - struct serial_icounter_struct *p_cuser; /* user space */ - - if (serial_paranoia_check(info, tty->name, "rs_ioctl")) - return -ENODEV; - - if (cmd != TIOCMIWAIT) { - if (tty->flags & (1 << TTY_IO_ERROR)) - return -EIO; - } - - switch (cmd) { - case TCSBRK: /* SVID version: non-zero arg --> no break */ - retval = tty_check_change(tty); - if (retval) - return retval; - tty_wait_until_sent(tty, 0); - if (signal_pending(current)) - return -EINTR; - if (!arg) { - send_break(info, 250); /* 1/4 second */ - if (signal_pending(current)) - return -EINTR; - } - return 0; - case TCSBRKP: /* support for POSIX tcsendbreak() */ - retval = tty_check_change(tty); - if (retval) - return retval; - tty_wait_until_sent(tty, 0); - if (signal_pending(current)) - return -EINTR; - send_break(info, arg ? arg*100 : 250); - if (signal_pending(current)) - return -EINTR; - return 0; - case TIOCSBRK: - retval = tty_check_change(tty); - if (retval) - return retval; - tty_wait_until_sent(tty, 0); - begin_break(info); - return 0; - case TIOCCBRK: - retval = tty_check_change(tty); - if (retval) - return retval; - end_break(info); - return 0; -#ifdef maybe - case TIOCSERGETLSR: /* Get line status register */ - return get_lsr_info(info, (unsigned int *) arg); -#endif - /* - * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change - * - mask passed in arg for lines of interest - * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) - * Caller should use TIOCGICOUNT to see which one it was - */ - case TIOCMIWAIT: -#ifdef modem_control - local_irq_disable(); - /* note the counters on entry */ - cprev = info->state->icount; - local_irq_enable(); - while (1) { - interruptible_sleep_on(&info->delta_msr_wait); - /* see if a signal did it */ - if (signal_pending(current)) - return -ERESTARTSYS; - local_irq_disable(); - cnow = info->state->icount; /* atomic copy */ - local_irq_enable(); - if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && - cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) - return -EIO; /* no change => error */ - if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || - ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || - ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || - ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) { - return 0; - } - cprev = cnow; - } - /* NOTREACHED */ -#else - return 0; -#endif - - - default: - return -ENOIOCTLCMD; - } - return 0; -} - -/* FIX UP modem control here someday...... -*/ -static void rs_360_set_termios(struct tty_struct *tty, struct ktermios *old_termios) -{ - ser_info_t *info = (ser_info_t *)tty->driver_data; - - change_speed(info); - -#ifdef modem_control - /* Handle transition to B0 status */ - if ((old_termios->c_cflag & CBAUD) && - !(tty->termios->c_cflag & CBAUD)) { - info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS); - local_irq_disable(); - serial_out(info, UART_MCR, info->MCR); - local_irq_enable(); - } - - /* Handle transition away from B0 status */ - if (!(old_termios->c_cflag & CBAUD) && - (tty->termios->c_cflag & CBAUD)) { - info->MCR |= UART_MCR_DTR; - if (!tty->hw_stopped || - !(tty->termios->c_cflag & CRTSCTS)) { - info->MCR |= UART_MCR_RTS; - } - local_irq_disable(); - serial_out(info, UART_MCR, info->MCR); - local_irq_enable(); - } - - /* Handle turning off CRTSCTS */ - if ((old_termios->c_cflag & CRTSCTS) && - !(tty->termios->c_cflag & CRTSCTS)) { - tty->hw_stopped = 0; - rs_360_start(tty); - } -#endif - -#if 0 - /* - * No need to wake up processes in open wait, since they - * sample the CLOCAL flag once, and don't recheck it. - * XXX It's not clear whether the current behavior is correct - * or not. Hence, this may change..... - */ - if (!(old_termios->c_cflag & CLOCAL) && - (tty->termios->c_cflag & CLOCAL)) - wake_up_interruptible(&info->open_wait); -#endif -} - -/* - * ------------------------------------------------------------ - * rs_close() - * - * This routine is called when the serial port gets closed. First, we - * wait for the last remaining data to be sent. Then, we unlink its - * async structure from the interrupt chain if necessary, and we free - * that IRQ if nothing is left in the chain. - * ------------------------------------------------------------ - */ -static void rs_360_close(struct tty_struct *tty, struct file * filp) -{ - ser_info_t *info = (ser_info_t *)tty->driver_data; - /* struct async_state *state; */ - struct serial_state *state; - unsigned long flags; - int idx; - volatile struct smc_regs *smcp; - volatile struct scc_regs *sccp; - - if (!info || serial_paranoia_check(info, tty->name, "rs_close")) - return; - - state = info->state; - - local_irq_save(flags); - - if (tty_hung_up_p(filp)) { - DBG_CNT("before DEC-hung"); - local_irq_restore(flags); - return; - } - -#ifdef SERIAL_DEBUG_OPEN - printk("rs_close ttys%d, count = %d\n", info->line, state->count); -#endif - if ((tty->count == 1) && (state->count != 1)) { - /* - * Uh, oh. tty->count is 1, which means that the tty - * structure will be freed. state->count should always - * be one in these conditions. If it's greater than - * one, we've got real problems, since it means the - * serial port won't be shutdown. - */ - printk("rs_close: bad serial port count; tty->count is 1, " - "state->count is %d\n", state->count); - state->count = 1; - } - if (--state->count < 0) { - printk("rs_close: bad serial port count for ttys%d: %d\n", - info->line, state->count); - state->count = 0; - } - if (state->count) { - DBG_CNT("before DEC-2"); - local_irq_restore(flags); - return; - } - info->flags |= ASYNC_CLOSING; - /* - * Now we wait for the transmit buffer to clear; and we notify - * the line discipline to only process XON/XOFF characters. - */ - tty->closing = 1; - if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) - tty_wait_until_sent(tty, info->closing_wait); - /* - * At this point we stop accepting input. To do this, we - * disable the receive line status interrupts, and tell the - * interrupt driver to stop checking the data ready bit in the - * line status register. - */ - info->read_status_mask &= ~BD_SC_EMPTY; - if (info->flags & ASYNC_INITIALIZED) { - - idx = PORT_NUM(info->state->smc_scc_num); - if (info->state->smc_scc_num & NUM_IS_SCC) { - sccp = &pquicc->scc_regs[idx]; - sccp->scc_sccm &= ~UART_SCCM_RX; - sccp->scc_gsmr.w.low &= ~SCC_GSMRL_ENR; - } else { - smcp = &pquicc->smc_regs[idx]; - smcp->smc_smcm &= ~SMCM_RX; - smcp->smc_smcmr &= ~SMCMR_REN; - } - /* - * Before we drop DTR, make sure the UART transmitter - * has completely drained; this is especially - * important if there is a transmit FIFO! - */ - rs_360_wait_until_sent(tty, info->timeout); - } - shutdown(info); - rs_360_flush_buffer(tty); - tty_ldisc_flush(tty); - tty->closing = 0; - info->event = 0; - info->port.tty = NULL; - if (info->blocked_open) { - if (info->close_delay) { - msleep_interruptible(jiffies_to_msecs(info->close_delay)); - } - wake_up_interruptible(&info->open_wait); - } - info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); - wake_up_interruptible(&info->close_wait); - local_irq_restore(flags); -} - -/* - * rs_wait_until_sent() --- wait until the transmitter is empty - */ -static void rs_360_wait_until_sent(struct tty_struct *tty, int timeout) -{ - ser_info_t *info = (ser_info_t *)tty->driver_data; - unsigned long orig_jiffies, char_time; - /*int lsr;*/ - volatile QUICC_BD *bdp; - - if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent")) - return; - -#ifdef maybe - if (info->state->type == PORT_UNKNOWN) - return; -#endif - - orig_jiffies = jiffies; - /* - * Set the check interval to be 1/5 of the estimated time to - * send a single character, and make it at least 1. The check - * interval should also be less than the timeout. - * - * Note: we have to use pretty tight timings here to satisfy - * the NIST-PCTS. - */ - char_time = 1; - if (timeout) - char_time = min(char_time, (unsigned long)timeout); -#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT - printk("In rs_wait_until_sent(%d) check=%lu...", timeout, char_time); - printk("jiff=%lu...", jiffies); -#endif - - /* We go through the loop at least once because we can't tell - * exactly when the last character exits the shifter. There can - * be at least two characters waiting to be sent after the buffers - * are empty. - */ - do { -#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT - printk("lsr = %d (jiff=%lu)...", lsr, jiffies); -#endif -/* current->counter = 0; make us low-priority */ - msleep_interruptible(jiffies_to_msecs(char_time)); - if (signal_pending(current)) - break; - if (timeout && (time_after(jiffies, orig_jiffies + timeout))) - break; - /* The 'tx_cur' is really the next buffer to send. We - * have to back up to the previous BD and wait for it - * to go. This isn't perfect, because all this indicates - * is the buffer is available. There are still characters - * in the CPM FIFO. - */ - bdp = info->tx_cur; - if (bdp == info->tx_bd_base) - bdp += (TX_NUM_FIFO-1); - else - bdp--; - } while (bdp->status & BD_SC_READY); - current->state = TASK_RUNNING; -#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT - printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies); -#endif -} - -/* - * rs_hangup() --- called by tty_hangup() when a hangup is signaled. - */ -static void rs_360_hangup(struct tty_struct *tty) -{ - ser_info_t *info = (ser_info_t *)tty->driver_data; - struct serial_state *state = info->state; - - if (serial_paranoia_check(info, tty->name, "rs_hangup")) - return; - - state = info->state; - - rs_360_flush_buffer(tty); - shutdown(info); - info->event = 0; - state->count = 0; - info->flags &= ~ASYNC_NORMAL_ACTIVE; - info->port.tty = NULL; - wake_up_interruptible(&info->open_wait); -} - -/* - * ------------------------------------------------------------ - * rs_open() and friends - * ------------------------------------------------------------ - */ -static int block_til_ready(struct tty_struct *tty, struct file * filp, - ser_info_t *info) -{ -#ifdef DO_THIS_LATER - DECLARE_WAITQUEUE(wait, current); -#endif - struct serial_state *state = info->state; - int retval; - int do_clocal = 0; - - /* - * If the device is in the middle of being closed, then block - * until it's done, and then try again. - */ - if (tty_hung_up_p(filp) || - (info->flags & ASYNC_CLOSING)) { - if (info->flags & ASYNC_CLOSING) - interruptible_sleep_on(&info->close_wait); -#ifdef SERIAL_DO_RESTART - if (info->flags & ASYNC_HUP_NOTIFY) - return -EAGAIN; - else - return -ERESTARTSYS; -#else - return -EAGAIN; -#endif - } - - /* - * If non-blocking mode is set, or the port is not enabled, - * then make the check up front and then exit. - * If this is an SMC port, we don't have modem control to wait - * for, so just get out here. - */ - if ((filp->f_flags & O_NONBLOCK) || - (tty->flags & (1 << TTY_IO_ERROR)) || - !(info->state->smc_scc_num & NUM_IS_SCC)) { - info->flags |= ASYNC_NORMAL_ACTIVE; - return 0; - } - - if (tty->termios->c_cflag & CLOCAL) - do_clocal = 1; - - /* - * Block waiting for the carrier detect and the line to become - * free (i.e., not in use by the callout). While we are in - * this loop, state->count is dropped by one, so that - * rs_close() knows when to free things. We restore it upon - * exit, either normal or abnormal. - */ - retval = 0; -#ifdef DO_THIS_LATER - add_wait_queue(&info->open_wait, &wait); -#ifdef SERIAL_DEBUG_OPEN - printk("block_til_ready before block: ttys%d, count = %d\n", - state->line, state->count); -#endif - local_irq_disable(); - if (!tty_hung_up_p(filp)) - state->count--; - local_irq_enable(); - info->blocked_open++; - while (1) { - local_irq_disable(); - if (tty->termios->c_cflag & CBAUD) - serial_out(info, UART_MCR, - serial_inp(info, UART_MCR) | - (UART_MCR_DTR | UART_MCR_RTS)); - local_irq_enable(); - set_current_state(TASK_INTERRUPTIBLE); - if (tty_hung_up_p(filp) || - !(info->flags & ASYNC_INITIALIZED)) { -#ifdef SERIAL_DO_RESTART - if (info->flags & ASYNC_HUP_NOTIFY) - retval = -EAGAIN; - else - retval = -ERESTARTSYS; -#else - retval = -EAGAIN; -#endif - break; - } - if (!(info->flags & ASYNC_CLOSING) && - (do_clocal || (serial_in(info, UART_MSR) & - UART_MSR_DCD))) - break; - if (signal_pending(current)) { - retval = -ERESTARTSYS; - break; - } -#ifdef SERIAL_DEBUG_OPEN - printk("block_til_ready blocking: ttys%d, count = %d\n", - info->line, state->count); -#endif - tty_unlock(); - schedule(); - tty_lock(); - } - current->state = TASK_RUNNING; - remove_wait_queue(&info->open_wait, &wait); - if (!tty_hung_up_p(filp)) - state->count++; - info->blocked_open--; -#ifdef SERIAL_DEBUG_OPEN - printk("block_til_ready after blocking: ttys%d, count = %d\n", - info->line, state->count); -#endif -#endif /* DO_THIS_LATER */ - if (retval) - return retval; - info->flags |= ASYNC_NORMAL_ACTIVE; - return 0; -} - -static int get_async_struct(int line, ser_info_t **ret_info) -{ - struct serial_state *sstate; - - sstate = rs_table + line; - if (sstate->info) { - sstate->count++; - *ret_info = (ser_info_t *)sstate->info; - return 0; - } - else { - return -ENOMEM; - } -} - -/* - * This routine is called whenever a serial port is opened. It - * enables interrupts for a serial port, linking in its async structure into - * the IRQ chain. It also performs the serial-specific - * initialization for the tty structure. - */ -static int rs_360_open(struct tty_struct *tty, struct file * filp) -{ - ser_info_t *info; - int retval, line; - - line = tty->index; - if ((line < 0) || (line >= NR_PORTS)) - return -ENODEV; - retval = get_async_struct(line, &info); - if (retval) - return retval; - if (serial_paranoia_check(info, tty->name, "rs_open")) - return -ENODEV; - -#ifdef SERIAL_DEBUG_OPEN - printk("rs_open %s, count = %d\n", tty->name, info->state->count); -#endif - tty->driver_data = info; - info->port.tty = tty; - - /* - * Start up serial port - */ - retval = startup(info); - if (retval) - return retval; - - retval = block_til_ready(tty, filp, info); - if (retval) { -#ifdef SERIAL_DEBUG_OPEN - printk("rs_open returning after block_til_ready with %d\n", - retval); -#endif - return retval; - } - -#ifdef SERIAL_DEBUG_OPEN - printk("rs_open %s successful...", tty->name); -#endif - return 0; -} - -/* - * /proc fs routines.... - */ - -static inline int line_info(char *buf, struct serial_state *state) -{ -#ifdef notdef - struct async_struct *info = state->info, scr_info; - char stat_buf[30], control, status; -#endif - int ret; - - ret = sprintf(buf, "%d: uart:%s port:%X irq:%d", - state->line, - (state->smc_scc_num & NUM_IS_SCC) ? "SCC" : "SMC", - (unsigned int)(state->port), state->irq); - - if (!state->port || (state->type == PORT_UNKNOWN)) { - ret += sprintf(buf+ret, "\n"); - return ret; - } - -#ifdef notdef - /* - * Figure out the current RS-232 lines - */ - if (!info) { - info = &scr_info; /* This is just for serial_{in,out} */ - - info->magic = SERIAL_MAGIC; - info->port = state->port; - info->flags = state->flags; - info->quot = 0; - info->port.tty = NULL; - } - local_irq_disable(); - status = serial_in(info, UART_MSR); - control = info ? info->MCR : serial_in(info, UART_MCR); - local_irq_enable(); - - stat_buf[0] = 0; - stat_buf[1] = 0; - if (control & UART_MCR_RTS) - strcat(stat_buf, "|RTS"); - if (status & UART_MSR_CTS) - strcat(stat_buf, "|CTS"); - if (control & UART_MCR_DTR) - strcat(stat_buf, "|DTR"); - if (status & UART_MSR_DSR) - strcat(stat_buf, "|DSR"); - if (status & UART_MSR_DCD) - strcat(stat_buf, "|CD"); - if (status & UART_MSR_RI) - strcat(stat_buf, "|RI"); - - if (info->quot) { - ret += sprintf(buf+ret, " baud:%d", - state->baud_base / info->quot); - } - - ret += sprintf(buf+ret, " tx:%d rx:%d", - state->icount.tx, state->icount.rx); - - if (state->icount.frame) - ret += sprintf(buf+ret, " fe:%d", state->icount.frame); - - if (state->icount.parity) - ret += sprintf(buf+ret, " pe:%d", state->icount.parity); - - if (state->icount.brk) - ret += sprintf(buf+ret, " brk:%d", state->icount.brk); - - if (state->icount.overrun) - ret += sprintf(buf+ret, " oe:%d", state->icount.overrun); - - /* - * Last thing is the RS-232 status lines - */ - ret += sprintf(buf+ret, " %s\n", stat_buf+1); -#endif - return ret; -} - -int rs_360_read_proc(char *page, char **start, off_t off, int count, - int *eof, void *data) -{ - int i, len = 0; - off_t begin = 0; - - len += sprintf(page, "serinfo:1.0 driver:%s\n", serial_version); - for (i = 0; i < NR_PORTS && len < 4000; i++) { - len += line_info(page + len, &rs_table[i]); - if (len+begin > off+count) - goto done; - if (len+begin < off) { - begin += len; - len = 0; - } - } - *eof = 1; -done: - if (off >= len+begin) - return 0; - *start = page + (begin-off); - return ((count < begin+len-off) ? count : begin+len-off); -} - -/* - * --------------------------------------------------------------------- - * rs_init() and friends - * - * rs_init() is called at boot-time to initialize the serial driver. - * --------------------------------------------------------------------- - */ - -/* - * This routine prints out the appropriate serial driver version - * number, and identifies which options were configured into this - * driver. - */ -static _INLINE_ void show_serial_version(void) -{ - printk(KERN_INFO "%s version %s\n", serial_name, serial_version); -} - - -/* - * The serial console driver used during boot. Note that these names - * clash with those found in "serial.c", so we currently can't support - * the 16xxx uarts and these at the same time. I will fix this to become - * an indirect function call from tty_io.c (or something). - */ - -#ifdef CONFIG_SERIAL_CONSOLE - -/* - * Print a string to the serial port trying not to disturb any possible - * real use of the port... - */ -static void my_console_write(int idx, const char *s, - unsigned count) -{ - struct serial_state *ser; - ser_info_t *info; - unsigned i; - QUICC_BD *bdp, *bdbase; - volatile struct smc_uart_pram *up; - volatile u_char *cp; - - ser = rs_table + idx; - - - /* If the port has been initialized for general use, we have - * to use the buffer descriptors allocated there. Otherwise, - * we simply use the single buffer allocated. - */ - if ((info = (ser_info_t *)ser->info) != NULL) { - bdp = info->tx_cur; - bdbase = info->tx_bd_base; - } - else { - /* Pointer to UART in parameter ram. - */ - /* up = (smc_uart_t *)&cpmp->cp_dparam[ser->port]; */ - up = &pquicc->pram[ser->port].scc.pothers.idma_smc.psmc.u; - - /* Get the address of the host memory buffer. - */ - bdp = bdbase = (QUICC_BD *)((uint)pquicc + (uint)up->tbase); - } - - /* - * We need to gracefully shut down the transmitter, disable - * interrupts, then send our bytes out. - */ - - /* - * Now, do each character. This is not as bad as it looks - * since this is a holding FIFO and not a transmitting FIFO. - * We could add the complexity of filling the entire transmit - * buffer, but we would just wait longer between accesses...... - */ - for (i = 0; i < count; i++, s++) { - /* Wait for transmitter fifo to empty. - * Ready indicates output is ready, and xmt is doing - * that, not that it is ready for us to send. - */ - while (bdp->status & BD_SC_READY); - - /* Send the character out. - */ - cp = bdp->buf; - *cp = *s; - - bdp->length = 1; - bdp->status |= BD_SC_READY; - - if (bdp->status & BD_SC_WRAP) - bdp = bdbase; - else - bdp++; - - /* if a LF, also do CR... */ - if (*s == 10) { - while (bdp->status & BD_SC_READY); - /* cp = __va(bdp->buf); */ - cp = bdp->buf; - *cp = 13; - bdp->length = 1; - bdp->status |= BD_SC_READY; - - if (bdp->status & BD_SC_WRAP) { - bdp = bdbase; - } - else { - bdp++; - } - } - } - - /* - * Finally, Wait for transmitter & holding register to empty - * and restore the IER - */ - while (bdp->status & BD_SC_READY); - - if (info) - info->tx_cur = (QUICC_BD *)bdp; -} - -static void serial_console_write(struct console *c, const char *s, - unsigned count) -{ -#ifdef CONFIG_KGDB - /* Try to let stub handle output. Returns true if it did. */ - if (kgdb_output_string(s, count)) - return; -#endif - my_console_write(c->index, s, count); -} - - - -/*void console_print_68360(const char *p) -{ - const char *cp = p; - int i; - - for (i=0;cp[i]!=0;i++); - - serial_console_write (p, i); - - //Comment this if you want to have a strict interrupt-driven output - //rs_fair_output(); - - return; -}*/ - - - - - - -#ifdef CONFIG_XMON -int -xmon_360_write(const char *s, unsigned count) -{ - my_console_write(0, s, count); - return(count); -} -#endif - -#ifdef CONFIG_KGDB -void -putDebugChar(char ch) -{ - my_console_write(0, &ch, 1); -} -#endif - -/* - * Receive character from the serial port. This only works well - * before the port is initialized for real use. - */ -static int my_console_wait_key(int idx, int xmon, char *obuf) -{ - struct serial_state *ser; - u_char c, *cp; - ser_info_t *info; - QUICC_BD *bdp; - volatile struct smc_uart_pram *up; - int i; - - ser = rs_table + idx; - - /* Get the address of the host memory buffer. - * If the port has been initialized for general use, we must - * use information from the port structure. - */ - if ((info = (ser_info_t *)ser->info)) - bdp = info->rx_cur; - else - /* bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_rbase]; */ - bdp = (QUICC_BD *)((uint)pquicc + (uint)up->tbase); - - /* Pointer to UART in parameter ram. - */ - /* up = (smc_uart_t *)&cpmp->cp_dparam[ser->port]; */ - up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u; - - /* - * We need to gracefully shut down the receiver, disable - * interrupts, then read the input. - * XMON just wants a poll. If no character, return -1, else - * return the character. - */ - if (!xmon) { - while (bdp->status & BD_SC_EMPTY); - } - else { - if (bdp->status & BD_SC_EMPTY) - return -1; - } - - cp = (char *)bdp->buf; - - if (obuf) { - i = c = bdp->length; - while (i-- > 0) - *obuf++ = *cp++; - } - else { - c = *cp; - } - bdp->status |= BD_SC_EMPTY; - - if (info) { - if (bdp->status & BD_SC_WRAP) { - bdp = info->rx_bd_base; - } - else { - bdp++; - } - info->rx_cur = (QUICC_BD *)bdp; - } - - return((int)c); -} - -static int serial_console_wait_key(struct console *co) -{ - return(my_console_wait_key(co->index, 0, NULL)); -} - -#ifdef CONFIG_XMON -int -xmon_360_read_poll(void) -{ - return(my_console_wait_key(0, 1, NULL)); -} - -int -xmon_360_read_char(void) -{ - return(my_console_wait_key(0, 0, NULL)); -} -#endif - -#ifdef CONFIG_KGDB -static char kgdb_buf[RX_BUF_SIZE], *kgdp; -static int kgdb_chars; - -unsigned char -getDebugChar(void) -{ - if (kgdb_chars <= 0) { - kgdb_chars = my_console_wait_key(0, 0, kgdb_buf); - kgdp = kgdb_buf; - } - kgdb_chars--; - - return(*kgdp++); -} - -void kgdb_interruptible(int state) -{ -} -void kgdb_map_scc(void) -{ - struct serial_state *ser; - uint mem_addr; - volatile QUICC_BD *bdp; - volatile smc_uart_t *up; - - cpmp = (cpm360_t *)&(((immap_t *)IMAP_ADDR)->im_cpm); - - /* To avoid data cache CPM DMA coherency problems, allocate a - * buffer in the CPM DPRAM. This will work until the CPM and - * serial ports are initialized. At that time a memory buffer - * will be allocated. - * The port is already initialized from the boot procedure, all - * we do here is give it a different buffer and make it a FIFO. - */ - - ser = rs_table; - - /* Right now, assume we are using SMCs. - */ - up = (smc_uart_t *)&cpmp->cp_dparam[ser->port]; - - /* Allocate space for an input FIFO, plus a few bytes for output. - * Allocate bytes to maintain word alignment. - */ - mem_addr = (uint)(&cpmp->cp_dpmem[0x1000]); - - /* Set the physical address of the host memory buffers in - * the buffer descriptors. - */ - bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_rbase]; - bdp->buf = mem_addr; - - bdp = (QUICC_BD *)&cpmp->cp_dpmem[up->smc_tbase]; - bdp->buf = mem_addr+RX_BUF_SIZE; - - up->smc_mrblr = RX_BUF_SIZE; /* receive buffer length */ - up->smc_maxidl = RX_BUF_SIZE; -} -#endif - -static struct tty_struct *serial_console_device(struct console *c, int *index) -{ - *index = c->index; - return serial_driver; -} - - -struct console sercons = { - .name = "ttyS", - .write = serial_console_write, - .device = serial_console_device, - .wait_key = serial_console_wait_key, - .setup = serial_console_setup, - .flags = CON_PRINTBUFFER, - .index = CONFIG_SERIAL_CONSOLE_PORT, -}; - - - -/* - * Register console. - */ -long console_360_init(long kmem_start, long kmem_end) -{ - register_console(&sercons); - /*register_console (console_print_68360); - 2.0.38 only required a write - function pointer. */ - return kmem_start; -} - -#endif - -/* Index in baud rate table of the default console baud rate. -*/ -static int baud_idx; - -static const struct tty_operations rs_360_ops = { - .owner = THIS_MODULE, - .open = rs_360_open, - .close = rs_360_close, - .write = rs_360_write, - .put_char = rs_360_put_char, - .write_room = rs_360_write_room, - .chars_in_buffer = rs_360_chars_in_buffer, - .flush_buffer = rs_360_flush_buffer, - .ioctl = rs_360_ioctl, - .throttle = rs_360_throttle, - .unthrottle = rs_360_unthrottle, - /* .send_xchar = rs_360_send_xchar, */ - .set_termios = rs_360_set_termios, - .stop = rs_360_stop, - .start = rs_360_start, - .hangup = rs_360_hangup, - /* .wait_until_sent = rs_360_wait_until_sent, */ - /* .read_proc = rs_360_read_proc, */ - .tiocmget = rs_360_tiocmget, - .tiocmset = rs_360_tiocmset, -}; - -static int __init rs_360_init(void) -{ - struct serial_state * state; - ser_info_t *info; - void *mem_addr; - uint dp_addr, iobits; - int i, j, idx; - ushort chan; - QUICC_BD *bdp; - volatile QUICC *cp; - volatile struct smc_regs *sp; - volatile struct smc_uart_pram *up; - volatile struct scc_regs *scp; - volatile struct uart_pram *sup; - /* volatile immap_t *immap; */ - - serial_driver = alloc_tty_driver(NR_PORTS); - if (!serial_driver) - return -1; - - show_serial_version(); - - serial_driver->name = "ttyS"; - serial_driver->major = TTY_MAJOR; - serial_driver->minor_start = 64; - serial_driver->type = TTY_DRIVER_TYPE_SERIAL; - serial_driver->subtype = SERIAL_TYPE_NORMAL; - serial_driver->init_termios = tty_std_termios; - serial_driver->init_termios.c_cflag = - baud_idx | CS8 | CREAD | HUPCL | CLOCAL; - serial_driver->flags = TTY_DRIVER_REAL_RAW; - tty_set_operations(serial_driver, &rs_360_ops); - - if (tty_register_driver(serial_driver)) - panic("Couldn't register serial driver\n"); - - cp = pquicc; /* Get pointer to Communication Processor */ - /* immap = (immap_t *)IMAP_ADDR; */ /* and to internal registers */ - - - /* Configure SCC2, SCC3, and SCC4 instead of port A parallel I/O. - */ - /* The "standard" configuration through the 860. - */ -/* immap->im_ioport.iop_papar |= 0x00fc; */ -/* immap->im_ioport.iop_padir &= ~0x00fc; */ -/* immap->im_ioport.iop_paodr &= ~0x00fc; */ - cp->pio_papar |= 0x00fc; - cp->pio_padir &= ~0x00fc; - /* cp->pio_paodr &= ~0x00fc; */ - - - /* Since we don't yet do modem control, connect the port C pins - * as general purpose I/O. This will assert CTS and CD for the - * SCC ports. - */ - /* FIXME: see 360um p.7-365 and 860um p.34-12 - * I can't make sense of these bits - mleslie*/ -/* immap->im_ioport.iop_pcdir |= 0x03c6; */ -/* immap->im_ioport.iop_pcpar &= ~0x03c6; */ - -/* cp->pio_pcdir |= 0x03c6; */ -/* cp->pio_pcpar &= ~0x03c6; */ - - - - /* Connect SCC2 and SCC3 to NMSI. Connect BRG3 to SCC2 and - * BRG4 to SCC3. - */ - cp->si_sicr &= ~0x00ffff00; - cp->si_sicr |= 0x001b1200; - -#ifdef CONFIG_PP04 - /* Frequentis PP04 forced to RS-232 until we know better. - * Port C 12 and 13 low enables RS-232 on SCC3 and SCC4. - */ - immap->im_ioport.iop_pcdir |= 0x000c; - immap->im_ioport.iop_pcpar &= ~0x000c; - immap->im_ioport.iop_pcdat &= ~0x000c; - - /* This enables the TX driver. - */ - cp->cp_pbpar &= ~0x6000; - cp->cp_pbdat &= ~0x6000; -#endif - - for (i = 0, state = rs_table; i < NR_PORTS; i++,state++) { - state->magic = SSTATE_MAGIC; - state->line = i; - state->type = PORT_UNKNOWN; - state->custom_divisor = 0; - state->close_delay = 5*HZ/10; - state->closing_wait = 30*HZ; - state->icount.cts = state->icount.dsr = - state->icount.rng = state->icount.dcd = 0; - state->icount.rx = state->icount.tx = 0; - state->icount.frame = state->icount.parity = 0; - state->icount.overrun = state->icount.brk = 0; - printk(KERN_INFO "ttyS%d at irq 0x%02x is an %s\n", - i, (unsigned int)(state->irq), - (state->smc_scc_num & NUM_IS_SCC) ? "SCC" : "SMC"); - -#ifdef CONFIG_SERIAL_CONSOLE - /* If we just printed the message on the console port, and - * we are about to initialize it for general use, we have - * to wait a couple of character times for the CR/NL to - * make it out of the transmit buffer. - */ - if (i == CONFIG_SERIAL_CONSOLE_PORT) - mdelay(8); - - -/* idx = PORT_NUM(info->state->smc_scc_num); */ -/* if (info->state->smc_scc_num & NUM_IS_SCC) */ -/* chan = scc_chan_map[idx]; */ -/* else */ -/* chan = smc_chan_map[idx]; */ - -/* cp->cp_cr = mk_cr_cmd(chan, CPM_CR_STOP_TX) | CPM_CR_FLG; */ -/* while (cp->cp_cr & CPM_CR_FLG); */ - -#endif - /* info = kmalloc(sizeof(ser_info_t), GFP_KERNEL); */ - info = &quicc_ser_info[i]; - if (info) { - memset (info, 0, sizeof(ser_info_t)); - info->magic = SERIAL_MAGIC; - info->line = i; - info->flags = state->flags; - INIT_WORK(&info->tqueue, do_softint, info); - INIT_WORK(&info->tqueue_hangup, do_serial_hangup, info); - init_waitqueue_head(&info->open_wait); - init_waitqueue_head(&info->close_wait); - info->state = state; - state->info = (struct async_struct *)info; - - /* We need to allocate a transmit and receive buffer - * descriptors from dual port ram, and a character - * buffer area from host mem. - */ - dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * RX_NUM_FIFO); - - /* Allocate space for FIFOs in the host memory. - * (for now this is from a static array of buffers :( - */ - /* mem_addr = m360_cpm_hostalloc(RX_NUM_FIFO * RX_BUF_SIZE); */ - /* mem_addr = kmalloc (RX_NUM_FIFO * RX_BUF_SIZE, GFP_BUFFER); */ - mem_addr = &rx_buf_pool[i * RX_NUM_FIFO * RX_BUF_SIZE]; - - /* Set the physical address of the host memory - * buffers in the buffer descriptors, and the - * virtual address for us to work with. - */ - bdp = (QUICC_BD *)((uint)pquicc + dp_addr); - info->rx_cur = info->rx_bd_base = bdp; - - /* initialize rx buffer descriptors */ - for (j=0; j<(RX_NUM_FIFO-1); j++) { - bdp->buf = &rx_buf_pool[(i * RX_NUM_FIFO + j ) * RX_BUF_SIZE]; - bdp->status = BD_SC_EMPTY | BD_SC_INTRPT; - mem_addr += RX_BUF_SIZE; - bdp++; - } - bdp->buf = &rx_buf_pool[(i * RX_NUM_FIFO + j ) * RX_BUF_SIZE]; - bdp->status = BD_SC_WRAP | BD_SC_EMPTY | BD_SC_INTRPT; - - - idx = PORT_NUM(info->state->smc_scc_num); - if (info->state->smc_scc_num & NUM_IS_SCC) { - -#if defined (CONFIG_UCQUICC) && 1 - /* set the transceiver mode to RS232 */ - sipex_mode_bits &= ~(uint)SIPEX_MODE(idx,0x0f); /* clear current mode */ - sipex_mode_bits |= (uint)SIPEX_MODE(idx,0x02); - *(uint *)_periph_base = sipex_mode_bits; - /* printk ("sipex bits = 0x%08x\n", sipex_mode_bits); */ -#endif - } - - dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * TX_NUM_FIFO); - - /* Allocate space for FIFOs in the host memory. - */ - /* mem_addr = m360_cpm_hostalloc(TX_NUM_FIFO * TX_BUF_SIZE); */ - /* mem_addr = kmalloc (TX_NUM_FIFO * TX_BUF_SIZE, GFP_BUFFER); */ - mem_addr = &tx_buf_pool[i * TX_NUM_FIFO * TX_BUF_SIZE]; - - /* Set the physical address of the host memory - * buffers in the buffer descriptors, and the - * virtual address for us to work with. - */ - /* bdp = (QUICC_BD *)&cp->cp_dpmem[dp_addr]; */ - bdp = (QUICC_BD *)((uint)pquicc + dp_addr); - info->tx_cur = info->tx_bd_base = (QUICC_BD *)bdp; - - /* initialize tx buffer descriptors */ - for (j=0; j<(TX_NUM_FIFO-1); j++) { - bdp->buf = &tx_buf_pool[(i * TX_NUM_FIFO + j ) * TX_BUF_SIZE]; - bdp->status = BD_SC_INTRPT; - mem_addr += TX_BUF_SIZE; - bdp++; - } - bdp->buf = &tx_buf_pool[(i * TX_NUM_FIFO + j ) * TX_BUF_SIZE]; - bdp->status = (BD_SC_WRAP | BD_SC_INTRPT); - - if (info->state->smc_scc_num & NUM_IS_SCC) { - scp = &pquicc->scc_regs[idx]; - sup = &pquicc->pram[info->state->port].scc.pscc.u; - sup->rbase = dp_addr; - sup->tbase = dp_addr; - - /* Set up the uart parameters in the - * parameter ram. - */ - sup->rfcr = SMC_EB; - sup->tfcr = SMC_EB; - - /* Set this to 1 for now, so we get single - * character interrupts. Using idle character - * time requires some additional tuning. - */ - sup->mrblr = 1; - sup->max_idl = 0; - sup->brkcr = 1; - sup->parec = 0; - sup->frmer = 0; - sup->nosec = 0; - sup->brkec = 0; - sup->uaddr1 = 0; - sup->uaddr2 = 0; - sup->toseq = 0; - { - int i; - for (i=0;i<8;i++) - sup->cc[i] = 0x8000; - } - sup->rccm = 0xc0ff; - - /* Send the CPM an initialize command. - */ - chan = scc_chan_map[idx]; - - /* execute the INIT RX & TX PARAMS command for this channel. */ - cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG; - while (cp->cp_cr & CPM_CR_FLG); - - /* Set UART mode, 8 bit, no parity, one stop. - * Enable receive and transmit. - */ - scp->scc_gsmr.w.high = 0; - scp->scc_gsmr.w.low = - (SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16); - - /* Disable all interrupts and clear all pending - * events. - */ - scp->scc_sccm = 0; - scp->scc_scce = 0xffff; - scp->scc_dsr = 0x7e7e; - scp->scc_psmr = 0x3000; - - /* If the port is the console, enable Rx and Tx. - */ -#ifdef CONFIG_SERIAL_CONSOLE - if (i == CONFIG_SERIAL_CONSOLE_PORT) - scp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT); -#endif - } - else { - /* Configure SMCs Tx/Rx instead of port B - * parallel I/O. - */ - up = &pquicc->pram[info->state->port].scc.pothers.idma_smc.psmc.u; - up->rbase = dp_addr; - - iobits = 0xc0 << (idx * 4); - cp->pip_pbpar |= iobits; - cp->pip_pbdir &= ~iobits; - cp->pip_pbodr &= ~iobits; - - - /* Connect the baud rate generator to the - * SMC based upon index in rs_table. Also - * make sure it is connected to NMSI. - */ - cp->si_simode &= ~(0xffff << (idx * 16)); - cp->si_simode |= (i << ((idx * 16) + 12)); - - up->tbase = dp_addr; - - /* Set up the uart parameters in the - * parameter ram. - */ - up->rfcr = SMC_EB; - up->tfcr = SMC_EB; - - /* Set this to 1 for now, so we get single - * character interrupts. Using idle character - * time requires some additional tuning. - */ - up->mrblr = 1; - up->max_idl = 0; - up->brkcr = 1; - - /* Send the CPM an initialize command. - */ - chan = smc_chan_map[idx]; - - cp->cp_cr = mk_cr_cmd(chan, - CPM_CR_INIT_TRX) | CPM_CR_FLG; -#ifdef CONFIG_SERIAL_CONSOLE - if (i == CONFIG_SERIAL_CONSOLE_PORT) - printk(""); -#endif - while (cp->cp_cr & CPM_CR_FLG); - - /* Set UART mode, 8 bit, no parity, one stop. - * Enable receive and transmit. - */ - sp = &cp->smc_regs[idx]; - sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART; - - /* Disable all interrupts and clear all pending - * events. - */ - sp->smc_smcm = 0; - sp->smc_smce = 0xff; - - /* If the port is the console, enable Rx and Tx. - */ -#ifdef CONFIG_SERIAL_CONSOLE - if (i == CONFIG_SERIAL_CONSOLE_PORT) - sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN; -#endif - } - - /* Install interrupt handler. - */ - /* cpm_install_handler(IRQ_MACHSPEC | state->irq, rs_360_interrupt, info); */ - /*request_irq(IRQ_MACHSPEC | state->irq, rs_360_interrupt, */ - request_irq(state->irq, rs_360_interrupt, - IRQ_FLG_LOCK, "ttyS", (void *)info); - - /* Set up the baud rate generator. - */ - m360_cpm_setbrg(i, baud_table[baud_idx]); - - } - } - - return 0; -} -module_init(rs_360_init); - -/* This must always be called before the rs_360_init() function, otherwise - * it blows away the port control information. - */ -//static int __init serial_console_setup( struct console *co, char *options) -int serial_console_setup( struct console *co, char *options) -{ - struct serial_state *ser; - uint mem_addr, dp_addr, bidx, idx, iobits; - ushort chan; - QUICC_BD *bdp; - volatile QUICC *cp; - volatile struct smc_regs *sp; - volatile struct scc_regs *scp; - volatile struct smc_uart_pram *up; - volatile struct uart_pram *sup; - -/* mleslie TODO: - * add something to the 68k bootloader to store a desired initial console baud rate */ - -/* bd_t *bd; */ /* a board info struct used by EPPC-bug */ -/* bd = (bd_t *)__res; */ - - for (bidx = 0; bidx < (sizeof(baud_table) / sizeof(int)); bidx++) - /* if (bd->bi_baudrate == baud_table[bidx]) */ - if (CONSOLE_BAUDRATE == baud_table[bidx]) - break; - - /* co->cflag = CREAD|CLOCAL|bidx|CS8; */ - baud_idx = bidx; - - ser = rs_table + CONFIG_SERIAL_CONSOLE_PORT; - - cp = pquicc; /* Get pointer to Communication Processor */ - - idx = PORT_NUM(ser->smc_scc_num); - if (ser->smc_scc_num & NUM_IS_SCC) { - - /* TODO: need to set up SCC pin assignment etc. here */ - - } - else { - iobits = 0xc0 << (idx * 4); - cp->pip_pbpar |= iobits; - cp->pip_pbdir &= ~iobits; - cp->pip_pbodr &= ~iobits; - - /* Connect the baud rate generator to the - * SMC based upon index in rs_table. Also - * make sure it is connected to NMSI. - */ - cp->si_simode &= ~(0xffff << (idx * 16)); - cp->si_simode |= (idx << ((idx * 16) + 12)); - } - - /* When we get here, the CPM has been reset, so we need - * to configure the port. - * We need to allocate a transmit and receive buffer descriptor - * from dual port ram, and a character buffer area from host mem. - */ - - /* Allocate space for two buffer descriptors in the DP ram. - */ - dp_addr = m360_cpm_dpalloc(sizeof(QUICC_BD) * CONSOLE_NUM_FIFO); - - /* Allocate space for two 2 byte FIFOs in the host memory. - */ - /* mem_addr = m360_cpm_hostalloc(8); */ - mem_addr = (uint)console_fifos; - - - /* Set the physical address of the host memory buffers in - * the buffer descriptors. - */ - /* bdp = (QUICC_BD *)&cp->cp_dpmem[dp_addr]; */ - bdp = (QUICC_BD *)((uint)pquicc + dp_addr); - bdp->buf = (char *)mem_addr; - (bdp+1)->buf = (char *)(mem_addr+4); - - /* For the receive, set empty and wrap. - * For transmit, set wrap. - */ - bdp->status = BD_SC_EMPTY | BD_SC_WRAP; - (bdp+1)->status = BD_SC_WRAP; - - /* Set up the uart parameters in the parameter ram. - */ - if (ser->smc_scc_num & NUM_IS_SCC) { - scp = &cp->scc_regs[idx]; - /* sup = (scc_uart_t *)&cp->cp_dparam[ser->port]; */ - sup = &pquicc->pram[ser->port].scc.pscc.u; - - sup->rbase = dp_addr; - sup->tbase = dp_addr + sizeof(QUICC_BD); - - /* Set up the uart parameters in the - * parameter ram. - */ - sup->rfcr = SMC_EB; - sup->tfcr = SMC_EB; - - /* Set this to 1 for now, so we get single - * character interrupts. Using idle character - * time requires some additional tuning. - */ - sup->mrblr = 1; - sup->max_idl = 0; - sup->brkcr = 1; - sup->parec = 0; - sup->frmer = 0; - sup->nosec = 0; - sup->brkec = 0; - sup->uaddr1 = 0; - sup->uaddr2 = 0; - sup->toseq = 0; - { - int i; - for (i=0;i<8;i++) - sup->cc[i] = 0x8000; - } - sup->rccm = 0xc0ff; - - /* Send the CPM an initialize command. - */ - chan = scc_chan_map[idx]; - - cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG; - while (cp->cp_cr & CPM_CR_FLG); - - /* Set UART mode, 8 bit, no parity, one stop. - * Enable receive and transmit. - */ - scp->scc_gsmr.w.high = 0; - scp->scc_gsmr.w.low = - (SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16); - - /* Disable all interrupts and clear all pending - * events. - */ - scp->scc_sccm = 0; - scp->scc_scce = 0xffff; - scp->scc_dsr = 0x7e7e; - scp->scc_psmr = 0x3000; - - scp->scc_gsmr.w.low |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT); - - } - else { - /* up = (smc_uart_t *)&cp->cp_dparam[ser->port]; */ - up = &pquicc->pram[ser->port].scc.pothers.idma_smc.psmc.u; - - up->rbase = dp_addr; /* Base of receive buffer desc. */ - up->tbase = dp_addr+sizeof(QUICC_BD); /* Base of xmt buffer desc. */ - up->rfcr = SMC_EB; - up->tfcr = SMC_EB; - - /* Set this to 1 for now, so we get single character interrupts. - */ - up->mrblr = 1; /* receive buffer length */ - up->max_idl = 0; /* wait forever for next char */ - - /* Send the CPM an initialize command. - */ - chan = smc_chan_map[idx]; - cp->cp_cr = mk_cr_cmd(chan, CPM_CR_INIT_TRX) | CPM_CR_FLG; - while (cp->cp_cr & CPM_CR_FLG); - - /* Set UART mode, 8 bit, no parity, one stop. - * Enable receive and transmit. - */ - sp = &cp->smc_regs[idx]; - sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART; - - /* And finally, enable Rx and Tx. - */ - sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN; - } - - /* Set up the baud rate generator. - */ - /* m360_cpm_setbrg((ser - rs_table), bd->bi_baudrate); */ - m360_cpm_setbrg((ser - rs_table), CONSOLE_BAUDRATE); - - return 0; -} - -/* - * Local variables: - * c-indent-level: 4 - * c-basic-offset: 4 - * tab-width: 4 - * End: - */ diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c deleted file mode 100644 index b25e6e490530..000000000000 --- a/drivers/serial/8250.c +++ /dev/null @@ -1,3377 +0,0 @@ -/* - * linux/drivers/char/8250.c - * - * Driver for 8250/16550-type serial ports - * - * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. - * - * Copyright (C) 2001 Russell King. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * A note about mapbase / membase - * - * mapbase is the physical address of the IO port. - * membase is an 'ioremapped' cookie. - */ - -#if defined(CONFIG_SERIAL_8250_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/delay.h> -#include <linux/platform_device.h> -#include <linux/tty.h> -#include <linux/ratelimit.h> -#include <linux/tty_flip.h> -#include <linux/serial_reg.h> -#include <linux/serial_core.h> -#include <linux/serial.h> -#include <linux/serial_8250.h> -#include <linux/nmi.h> -#include <linux/mutex.h> -#include <linux/slab.h> - -#include <asm/io.h> -#include <asm/irq.h> - -#include "8250.h" - -#ifdef CONFIG_SPARC -#include "suncore.h" -#endif - -/* - * Configuration: - * share_irqs - whether we pass IRQF_SHARED to request_irq(). This option - * is unsafe when used on edge-triggered interrupts. - */ -static unsigned int share_irqs = SERIAL8250_SHARE_IRQS; - -static unsigned int nr_uarts = CONFIG_SERIAL_8250_RUNTIME_UARTS; - -static struct uart_driver serial8250_reg; - -static int serial_index(struct uart_port *port) -{ - return (serial8250_reg.minor - 64) + port->line; -} - -static unsigned int skip_txen_test; /* force skip of txen test at init time */ - -/* - * Debugging. - */ -#if 0 -#define DEBUG_AUTOCONF(fmt...) printk(fmt) -#else -#define DEBUG_AUTOCONF(fmt...) do { } while (0) -#endif - -#if 0 -#define DEBUG_INTR(fmt...) printk(fmt) -#else -#define DEBUG_INTR(fmt...) do { } while (0) -#endif - -#define PASS_LIMIT 256 - -#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - - -/* - * We default to IRQ0 for the "no irq" hack. Some - * machine types want others as well - they're free - * to redefine this in their header file. - */ -#define is_real_interrupt(irq) ((irq) != 0) - -#ifdef CONFIG_SERIAL_8250_DETECT_IRQ -#define CONFIG_SERIAL_DETECT_IRQ 1 -#endif -#ifdef CONFIG_SERIAL_8250_MANY_PORTS -#define CONFIG_SERIAL_MANY_PORTS 1 -#endif - -/* - * HUB6 is always on. This will be removed once the header - * files have been cleaned. - */ -#define CONFIG_HUB6 1 - -#include <asm/serial.h> -/* - * SERIAL_PORT_DFNS tells us about built-in ports that have no - * standard enumeration mechanism. Platforms that can find all - * serial ports via mechanisms like ACPI or PCI need not supply it. - */ -#ifndef SERIAL_PORT_DFNS -#define SERIAL_PORT_DFNS -#endif - -static const struct old_serial_port old_serial_port[] = { - SERIAL_PORT_DFNS /* defined in asm/serial.h */ -}; - -#define UART_NR CONFIG_SERIAL_8250_NR_UARTS - -#ifdef CONFIG_SERIAL_8250_RSA - -#define PORT_RSA_MAX 4 -static unsigned long probe_rsa[PORT_RSA_MAX]; -static unsigned int probe_rsa_count; -#endif /* CONFIG_SERIAL_8250_RSA */ - -struct uart_8250_port { - struct uart_port port; - struct timer_list timer; /* "no irq" timer */ - struct list_head list; /* ports on this IRQ */ - unsigned short capabilities; /* port capabilities */ - unsigned short bugs; /* port bugs */ - unsigned int tx_loadsz; /* transmit fifo load size */ - unsigned char acr; - unsigned char ier; - unsigned char lcr; - unsigned char mcr; - unsigned char mcr_mask; /* mask of user bits */ - unsigned char mcr_force; /* mask of forced bits */ - unsigned char cur_iotype; /* Running I/O type */ - - /* - * Some bits in registers are cleared on a read, so they must - * be saved whenever the register is read but the bits will not - * be immediately processed. - */ -#define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS - unsigned char lsr_saved_flags; -#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA - unsigned char msr_saved_flags; -}; - -struct irq_info { - struct hlist_node node; - int irq; - spinlock_t lock; /* Protects list not the hash */ - struct list_head *head; -}; - -#define NR_IRQ_HASH 32 /* Can be adjusted later */ -static struct hlist_head irq_lists[NR_IRQ_HASH]; -static DEFINE_MUTEX(hash_mutex); /* Used to walk the hash */ - -/* - * Here we define the default xmit fifo size used for each type of UART. - */ -static const struct serial8250_config uart_config[] = { - [PORT_UNKNOWN] = { - .name = "unknown", - .fifo_size = 1, - .tx_loadsz = 1, - }, - [PORT_8250] = { - .name = "8250", - .fifo_size = 1, - .tx_loadsz = 1, - }, - [PORT_16450] = { - .name = "16450", - .fifo_size = 1, - .tx_loadsz = 1, - }, - [PORT_16550] = { - .name = "16550", - .fifo_size = 1, - .tx_loadsz = 1, - }, - [PORT_16550A] = { - .name = "16550A", - .fifo_size = 16, - .tx_loadsz = 16, - .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, - .flags = UART_CAP_FIFO, - }, - [PORT_CIRRUS] = { - .name = "Cirrus", - .fifo_size = 1, - .tx_loadsz = 1, - }, - [PORT_16650] = { - .name = "ST16650", - .fifo_size = 1, - .tx_loadsz = 1, - .flags = UART_CAP_FIFO | UART_CAP_EFR | UART_CAP_SLEEP, - }, - [PORT_16650V2] = { - .name = "ST16650V2", - .fifo_size = 32, - .tx_loadsz = 16, - .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_01 | - UART_FCR_T_TRIG_00, - .flags = UART_CAP_FIFO | UART_CAP_EFR | UART_CAP_SLEEP, - }, - [PORT_16750] = { - .name = "TI16750", - .fifo_size = 64, - .tx_loadsz = 64, - .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10 | - UART_FCR7_64BYTE, - .flags = UART_CAP_FIFO | UART_CAP_SLEEP | UART_CAP_AFE, - }, - [PORT_STARTECH] = { - .name = "Startech", - .fifo_size = 1, - .tx_loadsz = 1, - }, - [PORT_16C950] = { - .name = "16C950/954", - .fifo_size = 128, - .tx_loadsz = 128, - .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, - .flags = UART_CAP_FIFO | UART_CAP_EFR | UART_CAP_SLEEP, - }, - [PORT_16654] = { - .name = "ST16654", - .fifo_size = 64, - .tx_loadsz = 32, - .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_01 | - UART_FCR_T_TRIG_10, - .flags = UART_CAP_FIFO | UART_CAP_EFR | UART_CAP_SLEEP, - }, - [PORT_16850] = { - .name = "XR16850", - .fifo_size = 128, - .tx_loadsz = 128, - .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, - .flags = UART_CAP_FIFO | UART_CAP_EFR | UART_CAP_SLEEP, - }, - [PORT_RSA] = { - .name = "RSA", - .fifo_size = 2048, - .tx_loadsz = 2048, - .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_11, - .flags = UART_CAP_FIFO, - }, - [PORT_NS16550A] = { - .name = "NS16550A", - .fifo_size = 16, - .tx_loadsz = 16, - .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, - .flags = UART_CAP_FIFO | UART_NATSEMI, - }, - [PORT_XSCALE] = { - .name = "XScale", - .fifo_size = 32, - .tx_loadsz = 32, - .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, - .flags = UART_CAP_FIFO | UART_CAP_UUE, - }, - [PORT_RM9000] = { - .name = "RM9000", - .fifo_size = 16, - .tx_loadsz = 16, - .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, - .flags = UART_CAP_FIFO, - }, - [PORT_OCTEON] = { - .name = "OCTEON", - .fifo_size = 64, - .tx_loadsz = 64, - .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, - .flags = UART_CAP_FIFO, - }, - [PORT_AR7] = { - .name = "AR7", - .fifo_size = 16, - .tx_loadsz = 16, - .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_00, - .flags = UART_CAP_FIFO | UART_CAP_AFE, - }, - [PORT_U6_16550A] = { - .name = "U6_16550A", - .fifo_size = 64, - .tx_loadsz = 64, - .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, - .flags = UART_CAP_FIFO | UART_CAP_AFE, - }, -}; - -#if defined(CONFIG_MIPS_ALCHEMY) - -/* Au1x00 UART hardware has a weird register layout */ -static const u8 au_io_in_map[] = { - [UART_RX] = 0, - [UART_IER] = 2, - [UART_IIR] = 3, - [UART_LCR] = 5, - [UART_MCR] = 6, - [UART_LSR] = 7, - [UART_MSR] = 8, -}; - -static const u8 au_io_out_map[] = { - [UART_TX] = 1, - [UART_IER] = 2, - [UART_FCR] = 4, - [UART_LCR] = 5, - [UART_MCR] = 6, -}; - -/* sane hardware needs no mapping */ -static inline int map_8250_in_reg(struct uart_port *p, int offset) -{ - if (p->iotype != UPIO_AU) - return offset; - return au_io_in_map[offset]; -} - -static inline int map_8250_out_reg(struct uart_port *p, int offset) -{ - if (p->iotype != UPIO_AU) - return offset; - return au_io_out_map[offset]; -} - -#elif defined(CONFIG_SERIAL_8250_RM9K) - -static const u8 - regmap_in[8] = { - [UART_RX] = 0x00, - [UART_IER] = 0x0c, - [UART_IIR] = 0x14, - [UART_LCR] = 0x1c, - [UART_MCR] = 0x20, - [UART_LSR] = 0x24, - [UART_MSR] = 0x28, - [UART_SCR] = 0x2c - }, - regmap_out[8] = { - [UART_TX] = 0x04, - [UART_IER] = 0x0c, - [UART_FCR] = 0x18, - [UART_LCR] = 0x1c, - [UART_MCR] = 0x20, - [UART_LSR] = 0x24, - [UART_MSR] = 0x28, - [UART_SCR] = 0x2c - }; - -static inline int map_8250_in_reg(struct uart_port *p, int offset) -{ - if (p->iotype != UPIO_RM9000) - return offset; - return regmap_in[offset]; -} - -static inline int map_8250_out_reg(struct uart_port *p, int offset) -{ - if (p->iotype != UPIO_RM9000) - return offset; - return regmap_out[offset]; -} - -#else - -/* sane hardware needs no mapping */ -#define map_8250_in_reg(up, offset) (offset) -#define map_8250_out_reg(up, offset) (offset) - -#endif - -static unsigned int hub6_serial_in(struct uart_port *p, int offset) -{ - offset = map_8250_in_reg(p, offset) << p->regshift; - outb(p->hub6 - 1 + offset, p->iobase); - return inb(p->iobase + 1); -} - -static void hub6_serial_out(struct uart_port *p, int offset, int value) -{ - offset = map_8250_out_reg(p, offset) << p->regshift; - outb(p->hub6 - 1 + offset, p->iobase); - outb(value, p->iobase + 1); -} - -static unsigned int mem_serial_in(struct uart_port *p, int offset) -{ - offset = map_8250_in_reg(p, offset) << p->regshift; - return readb(p->membase + offset); -} - -static void mem_serial_out(struct uart_port *p, int offset, int value) -{ - offset = map_8250_out_reg(p, offset) << p->regshift; - writeb(value, p->membase + offset); -} - -static void mem32_serial_out(struct uart_port *p, int offset, int value) -{ - offset = map_8250_out_reg(p, offset) << p->regshift; - writel(value, p->membase + offset); -} - -static unsigned int mem32_serial_in(struct uart_port *p, int offset) -{ - offset = map_8250_in_reg(p, offset) << p->regshift; - return readl(p->membase + offset); -} - -static unsigned int au_serial_in(struct uart_port *p, int offset) -{ - offset = map_8250_in_reg(p, offset) << p->regshift; - return __raw_readl(p->membase + offset); -} - -static void au_serial_out(struct uart_port *p, int offset, int value) -{ - offset = map_8250_out_reg(p, offset) << p->regshift; - __raw_writel(value, p->membase + offset); -} - -static unsigned int tsi_serial_in(struct uart_port *p, int offset) -{ - unsigned int tmp; - offset = map_8250_in_reg(p, offset) << p->regshift; - if (offset == UART_IIR) { - tmp = readl(p->membase + (UART_IIR & ~3)); - return (tmp >> 16) & 0xff; /* UART_IIR % 4 == 2 */ - } else - return readb(p->membase + offset); -} - -static void tsi_serial_out(struct uart_port *p, int offset, int value) -{ - offset = map_8250_out_reg(p, offset) << p->regshift; - if (!((offset == UART_IER) && (value & UART_IER_UUE))) - writeb(value, p->membase + offset); -} - -/* Save the LCR value so it can be re-written when a Busy Detect IRQ occurs. */ -static inline void dwapb_save_out_value(struct uart_port *p, int offset, - int value) -{ - struct uart_8250_port *up = - container_of(p, struct uart_8250_port, port); - - if (offset == UART_LCR) - up->lcr = value; -} - -/* Read the IER to ensure any interrupt is cleared before returning from ISR. */ -static inline void dwapb_check_clear_ier(struct uart_port *p, int offset) -{ - if (offset == UART_TX || offset == UART_IER) - p->serial_in(p, UART_IER); -} - -static void dwapb_serial_out(struct uart_port *p, int offset, int value) -{ - int save_offset = offset; - offset = map_8250_out_reg(p, offset) << p->regshift; - dwapb_save_out_value(p, save_offset, value); - writeb(value, p->membase + offset); - dwapb_check_clear_ier(p, save_offset); -} - -static void dwapb32_serial_out(struct uart_port *p, int offset, int value) -{ - int save_offset = offset; - offset = map_8250_out_reg(p, offset) << p->regshift; - dwapb_save_out_value(p, save_offset, value); - writel(value, p->membase + offset); - dwapb_check_clear_ier(p, save_offset); -} - -static unsigned int io_serial_in(struct uart_port *p, int offset) -{ - offset = map_8250_in_reg(p, offset) << p->regshift; - return inb(p->iobase + offset); -} - -static void io_serial_out(struct uart_port *p, int offset, int value) -{ - offset = map_8250_out_reg(p, offset) << p->regshift; - outb(value, p->iobase + offset); -} - -static void set_io_from_upio(struct uart_port *p) -{ - struct uart_8250_port *up = - container_of(p, struct uart_8250_port, port); - switch (p->iotype) { - case UPIO_HUB6: - p->serial_in = hub6_serial_in; - p->serial_out = hub6_serial_out; - break; - - case UPIO_MEM: - p->serial_in = mem_serial_in; - p->serial_out = mem_serial_out; - break; - - case UPIO_RM9000: - case UPIO_MEM32: - p->serial_in = mem32_serial_in; - p->serial_out = mem32_serial_out; - break; - - case UPIO_AU: - p->serial_in = au_serial_in; - p->serial_out = au_serial_out; - break; - - case UPIO_TSI: - p->serial_in = tsi_serial_in; - p->serial_out = tsi_serial_out; - break; - - case UPIO_DWAPB: - p->serial_in = mem_serial_in; - p->serial_out = dwapb_serial_out; - break; - - case UPIO_DWAPB32: - p->serial_in = mem32_serial_in; - p->serial_out = dwapb32_serial_out; - break; - - default: - p->serial_in = io_serial_in; - p->serial_out = io_serial_out; - break; - } - /* Remember loaded iotype */ - up->cur_iotype = p->iotype; -} - -static void -serial_out_sync(struct uart_8250_port *up, int offset, int value) -{ - struct uart_port *p = &up->port; - switch (p->iotype) { - case UPIO_MEM: - case UPIO_MEM32: - case UPIO_AU: - case UPIO_DWAPB: - case UPIO_DWAPB32: - p->serial_out(p, offset, value); - p->serial_in(p, UART_LCR); /* safe, no side-effects */ - break; - default: - p->serial_out(p, offset, value); - } -} - -#define serial_in(up, offset) \ - (up->port.serial_in(&(up)->port, (offset))) -#define serial_out(up, offset, value) \ - (up->port.serial_out(&(up)->port, (offset), (value))) -/* - * We used to support using pause I/O for certain machines. We - * haven't supported this for a while, but just in case it's badly - * needed for certain old 386 machines, I've left these #define's - * in.... - */ -#define serial_inp(up, offset) serial_in(up, offset) -#define serial_outp(up, offset, value) serial_out(up, offset, value) - -/* Uart divisor latch read */ -static inline int _serial_dl_read(struct uart_8250_port *up) -{ - return serial_inp(up, UART_DLL) | serial_inp(up, UART_DLM) << 8; -} - -/* Uart divisor latch write */ -static inline void _serial_dl_write(struct uart_8250_port *up, int value) -{ - serial_outp(up, UART_DLL, value & 0xff); - serial_outp(up, UART_DLM, value >> 8 & 0xff); -} - -#if defined(CONFIG_MIPS_ALCHEMY) -/* Au1x00 haven't got a standard divisor latch */ -static int serial_dl_read(struct uart_8250_port *up) -{ - if (up->port.iotype == UPIO_AU) - return __raw_readl(up->port.membase + 0x28); - else - return _serial_dl_read(up); -} - -static void serial_dl_write(struct uart_8250_port *up, int value) -{ - if (up->port.iotype == UPIO_AU) - __raw_writel(value, up->port.membase + 0x28); - else - _serial_dl_write(up, value); -} -#elif defined(CONFIG_SERIAL_8250_RM9K) -static int serial_dl_read(struct uart_8250_port *up) -{ - return (up->port.iotype == UPIO_RM9000) ? - (((__raw_readl(up->port.membase + 0x10) << 8) | - (__raw_readl(up->port.membase + 0x08) & 0xff)) & 0xffff) : - _serial_dl_read(up); -} - -static void serial_dl_write(struct uart_8250_port *up, int value) -{ - if (up->port.iotype == UPIO_RM9000) { - __raw_writel(value, up->port.membase + 0x08); - __raw_writel(value >> 8, up->port.membase + 0x10); - } else { - _serial_dl_write(up, value); - } -} -#else -#define serial_dl_read(up) _serial_dl_read(up) -#define serial_dl_write(up, value) _serial_dl_write(up, value) -#endif - -/* - * For the 16C950 - */ -static void serial_icr_write(struct uart_8250_port *up, int offset, int value) -{ - serial_out(up, UART_SCR, offset); - serial_out(up, UART_ICR, value); -} - -static unsigned int serial_icr_read(struct uart_8250_port *up, int offset) -{ - unsigned int value; - - serial_icr_write(up, UART_ACR, up->acr | UART_ACR_ICRRD); - serial_out(up, UART_SCR, offset); - value = serial_in(up, UART_ICR); - serial_icr_write(up, UART_ACR, up->acr); - - return value; -} - -/* - * FIFO support. - */ -static void serial8250_clear_fifos(struct uart_8250_port *p) -{ - if (p->capabilities & UART_CAP_FIFO) { - serial_outp(p, UART_FCR, UART_FCR_ENABLE_FIFO); - serial_outp(p, UART_FCR, UART_FCR_ENABLE_FIFO | - UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); - serial_outp(p, UART_FCR, 0); - } -} - -/* - * IER sleep support. UARTs which have EFRs need the "extended - * capability" bit enabled. Note that on XR16C850s, we need to - * reset LCR to write to IER. - */ -static void serial8250_set_sleep(struct uart_8250_port *p, int sleep) -{ - if (p->capabilities & UART_CAP_SLEEP) { - if (p->capabilities & UART_CAP_EFR) { - serial_outp(p, UART_LCR, UART_LCR_CONF_MODE_B); - serial_outp(p, UART_EFR, UART_EFR_ECB); - serial_outp(p, UART_LCR, 0); - } - serial_outp(p, UART_IER, sleep ? UART_IERX_SLEEP : 0); - if (p->capabilities & UART_CAP_EFR) { - serial_outp(p, UART_LCR, UART_LCR_CONF_MODE_B); - serial_outp(p, UART_EFR, 0); - serial_outp(p, UART_LCR, 0); - } - } -} - -#ifdef CONFIG_SERIAL_8250_RSA -/* - * Attempts to turn on the RSA FIFO. Returns zero on failure. - * We set the port uart clock rate if we succeed. - */ -static int __enable_rsa(struct uart_8250_port *up) -{ - unsigned char mode; - int result; - - mode = serial_inp(up, UART_RSA_MSR); - result = mode & UART_RSA_MSR_FIFO; - - if (!result) { - serial_outp(up, UART_RSA_MSR, mode | UART_RSA_MSR_FIFO); - mode = serial_inp(up, UART_RSA_MSR); - result = mode & UART_RSA_MSR_FIFO; - } - - if (result) - up->port.uartclk = SERIAL_RSA_BAUD_BASE * 16; - - return result; -} - -static void enable_rsa(struct uart_8250_port *up) -{ - if (up->port.type == PORT_RSA) { - if (up->port.uartclk != SERIAL_RSA_BAUD_BASE * 16) { - spin_lock_irq(&up->port.lock); - __enable_rsa(up); - spin_unlock_irq(&up->port.lock); - } - if (up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) - serial_outp(up, UART_RSA_FRR, 0); - } -} - -/* - * Attempts to turn off the RSA FIFO. Returns zero on failure. - * It is unknown why interrupts were disabled in here. However, - * the caller is expected to preserve this behaviour by grabbing - * the spinlock before calling this function. - */ -static void disable_rsa(struct uart_8250_port *up) -{ - unsigned char mode; - int result; - - if (up->port.type == PORT_RSA && - up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) { - spin_lock_irq(&up->port.lock); - - mode = serial_inp(up, UART_RSA_MSR); - result = !(mode & UART_RSA_MSR_FIFO); - - if (!result) { - serial_outp(up, UART_RSA_MSR, mode & ~UART_RSA_MSR_FIFO); - mode = serial_inp(up, UART_RSA_MSR); - result = !(mode & UART_RSA_MSR_FIFO); - } - - if (result) - up->port.uartclk = SERIAL_RSA_BAUD_BASE_LO * 16; - spin_unlock_irq(&up->port.lock); - } -} -#endif /* CONFIG_SERIAL_8250_RSA */ - -/* - * This is a quickie test to see how big the FIFO is. - * It doesn't work at all the time, more's the pity. - */ -static int size_fifo(struct uart_8250_port *up) -{ - unsigned char old_fcr, old_mcr, old_lcr; - unsigned short old_dl; - int count; - - old_lcr = serial_inp(up, UART_LCR); - serial_outp(up, UART_LCR, 0); - old_fcr = serial_inp(up, UART_FCR); - old_mcr = serial_inp(up, UART_MCR); - serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO | - UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); - serial_outp(up, UART_MCR, UART_MCR_LOOP); - serial_outp(up, UART_LCR, UART_LCR_CONF_MODE_A); - old_dl = serial_dl_read(up); - serial_dl_write(up, 0x0001); - serial_outp(up, UART_LCR, 0x03); - for (count = 0; count < 256; count++) - serial_outp(up, UART_TX, count); - mdelay(20);/* FIXME - schedule_timeout */ - for (count = 0; (serial_inp(up, UART_LSR) & UART_LSR_DR) && - (count < 256); count++) - serial_inp(up, UART_RX); - serial_outp(up, UART_FCR, old_fcr); - serial_outp(up, UART_MCR, old_mcr); - serial_outp(up, UART_LCR, UART_LCR_CONF_MODE_A); - serial_dl_write(up, old_dl); - serial_outp(up, UART_LCR, old_lcr); - - return count; -} - -/* - * Read UART ID using the divisor method - set DLL and DLM to zero - * and the revision will be in DLL and device type in DLM. We - * preserve the device state across this. - */ -static unsigned int autoconfig_read_divisor_id(struct uart_8250_port *p) -{ - unsigned char old_dll, old_dlm, old_lcr; - unsigned int id; - - old_lcr = serial_inp(p, UART_LCR); - serial_outp(p, UART_LCR, UART_LCR_CONF_MODE_A); - - old_dll = serial_inp(p, UART_DLL); - old_dlm = serial_inp(p, UART_DLM); - - serial_outp(p, UART_DLL, 0); - serial_outp(p, UART_DLM, 0); - - id = serial_inp(p, UART_DLL) | serial_inp(p, UART_DLM) << 8; - - serial_outp(p, UART_DLL, old_dll); - serial_outp(p, UART_DLM, old_dlm); - serial_outp(p, UART_LCR, old_lcr); - - return id; -} - -/* - * This is a helper routine to autodetect StarTech/Exar/Oxsemi UART's. - * When this function is called we know it is at least a StarTech - * 16650 V2, but it might be one of several StarTech UARTs, or one of - * its clones. (We treat the broken original StarTech 16650 V1 as a - * 16550, and why not? Startech doesn't seem to even acknowledge its - * existence.) - * - * What evil have men's minds wrought... - */ -static void autoconfig_has_efr(struct uart_8250_port *up) -{ - unsigned int id1, id2, id3, rev; - - /* - * Everything with an EFR has SLEEP - */ - up->capabilities |= UART_CAP_EFR | UART_CAP_SLEEP; - - /* - * First we check to see if it's an Oxford Semiconductor UART. - * - * If we have to do this here because some non-National - * Semiconductor clone chips lock up if you try writing to the - * LSR register (which serial_icr_read does) - */ - - /* - * Check for Oxford Semiconductor 16C950. - * - * EFR [4] must be set else this test fails. - * - * This shouldn't be necessary, but Mike Hudson (Exoray@isys.ca) - * claims that it's needed for 952 dual UART's (which are not - * recommended for new designs). - */ - up->acr = 0; - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); - serial_out(up, UART_EFR, UART_EFR_ECB); - serial_out(up, UART_LCR, 0x00); - id1 = serial_icr_read(up, UART_ID1); - id2 = serial_icr_read(up, UART_ID2); - id3 = serial_icr_read(up, UART_ID3); - rev = serial_icr_read(up, UART_REV); - - DEBUG_AUTOCONF("950id=%02x:%02x:%02x:%02x ", id1, id2, id3, rev); - - if (id1 == 0x16 && id2 == 0xC9 && - (id3 == 0x50 || id3 == 0x52 || id3 == 0x54)) { - up->port.type = PORT_16C950; - - /* - * Enable work around for the Oxford Semiconductor 952 rev B - * chip which causes it to seriously miscalculate baud rates - * when DLL is 0. - */ - if (id3 == 0x52 && rev == 0x01) - up->bugs |= UART_BUG_QUOT; - return; - } - - /* - * We check for a XR16C850 by setting DLL and DLM to 0, and then - * reading back DLL and DLM. The chip type depends on the DLM - * value read back: - * 0x10 - XR16C850 and the DLL contains the chip revision. - * 0x12 - XR16C2850. - * 0x14 - XR16C854. - */ - id1 = autoconfig_read_divisor_id(up); - DEBUG_AUTOCONF("850id=%04x ", id1); - - id2 = id1 >> 8; - if (id2 == 0x10 || id2 == 0x12 || id2 == 0x14) { - up->port.type = PORT_16850; - return; - } - - /* - * It wasn't an XR16C850. - * - * We distinguish between the '654 and the '650 by counting - * how many bytes are in the FIFO. I'm using this for now, - * since that's the technique that was sent to me in the - * serial driver update, but I'm not convinced this works. - * I've had problems doing this in the past. -TYT - */ - if (size_fifo(up) == 64) - up->port.type = PORT_16654; - else - up->port.type = PORT_16650V2; -} - -/* - * We detected a chip without a FIFO. Only two fall into - * this category - the original 8250 and the 16450. The - * 16450 has a scratch register (accessible with LCR=0) - */ -static void autoconfig_8250(struct uart_8250_port *up) -{ - unsigned char scratch, status1, status2; - - up->port.type = PORT_8250; - - scratch = serial_in(up, UART_SCR); - serial_outp(up, UART_SCR, 0xa5); - status1 = serial_in(up, UART_SCR); - serial_outp(up, UART_SCR, 0x5a); - status2 = serial_in(up, UART_SCR); - serial_outp(up, UART_SCR, scratch); - - if (status1 == 0xa5 && status2 == 0x5a) - up->port.type = PORT_16450; -} - -static int broken_efr(struct uart_8250_port *up) -{ - /* - * Exar ST16C2550 "A2" devices incorrectly detect as - * having an EFR, and report an ID of 0x0201. See - * http://linux.derkeiler.com/Mailing-Lists/Kernel/2004-11/4812.html - */ - if (autoconfig_read_divisor_id(up) == 0x0201 && size_fifo(up) == 16) - return 1; - - return 0; -} - -/* - * We know that the chip has FIFOs. Does it have an EFR? The - * EFR is located in the same register position as the IIR and - * we know the top two bits of the IIR are currently set. The - * EFR should contain zero. Try to read the EFR. - */ -static void autoconfig_16550a(struct uart_8250_port *up) -{ - unsigned char status1, status2; - unsigned int iersave; - - up->port.type = PORT_16550A; - up->capabilities |= UART_CAP_FIFO; - - /* - * Check for presence of the EFR when DLAB is set. - * Only ST16C650V1 UARTs pass this test. - */ - serial_outp(up, UART_LCR, UART_LCR_CONF_MODE_A); - if (serial_in(up, UART_EFR) == 0) { - serial_outp(up, UART_EFR, 0xA8); - if (serial_in(up, UART_EFR) != 0) { - DEBUG_AUTOCONF("EFRv1 "); - up->port.type = PORT_16650; - up->capabilities |= UART_CAP_EFR | UART_CAP_SLEEP; - } else { - DEBUG_AUTOCONF("Motorola 8xxx DUART "); - } - serial_outp(up, UART_EFR, 0); - return; - } - - /* - * Maybe it requires 0xbf to be written to the LCR. - * (other ST16C650V2 UARTs, TI16C752A, etc) - */ - serial_outp(up, UART_LCR, UART_LCR_CONF_MODE_B); - if (serial_in(up, UART_EFR) == 0 && !broken_efr(up)) { - DEBUG_AUTOCONF("EFRv2 "); - autoconfig_has_efr(up); - return; - } - - /* - * Check for a National Semiconductor SuperIO chip. - * Attempt to switch to bank 2, read the value of the LOOP bit - * from EXCR1. Switch back to bank 0, change it in MCR. Then - * switch back to bank 2, read it from EXCR1 again and check - * it's changed. If so, set baud_base in EXCR2 to 921600. -- dwmw2 - */ - serial_outp(up, UART_LCR, 0); - status1 = serial_in(up, UART_MCR); - serial_outp(up, UART_LCR, 0xE0); - status2 = serial_in(up, 0x02); /* EXCR1 */ - - if (!((status2 ^ status1) & UART_MCR_LOOP)) { - serial_outp(up, UART_LCR, 0); - serial_outp(up, UART_MCR, status1 ^ UART_MCR_LOOP); - serial_outp(up, UART_LCR, 0xE0); - status2 = serial_in(up, 0x02); /* EXCR1 */ - serial_outp(up, UART_LCR, 0); - serial_outp(up, UART_MCR, status1); - - if ((status2 ^ status1) & UART_MCR_LOOP) { - unsigned short quot; - - serial_outp(up, UART_LCR, 0xE0); - - quot = serial_dl_read(up); - quot <<= 3; - - status1 = serial_in(up, 0x04); /* EXCR2 */ - status1 &= ~0xB0; /* Disable LOCK, mask out PRESL[01] */ - status1 |= 0x10; /* 1.625 divisor for baud_base --> 921600 */ - serial_outp(up, 0x04, status1); - - serial_dl_write(up, quot); - - serial_outp(up, UART_LCR, 0); - - up->port.uartclk = 921600*16; - up->port.type = PORT_NS16550A; - up->capabilities |= UART_NATSEMI; - return; - } - } - - /* - * No EFR. Try to detect a TI16750, which only sets bit 5 of - * the IIR when 64 byte FIFO mode is enabled when DLAB is set. - * Try setting it with and without DLAB set. Cheap clones - * set bit 5 without DLAB set. - */ - serial_outp(up, UART_LCR, 0); - serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); - status1 = serial_in(up, UART_IIR) >> 5; - serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); - serial_outp(up, UART_LCR, UART_LCR_CONF_MODE_A); - serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); - status2 = serial_in(up, UART_IIR) >> 5; - serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); - serial_outp(up, UART_LCR, 0); - - DEBUG_AUTOCONF("iir1=%d iir2=%d ", status1, status2); - - if (status1 == 6 && status2 == 7) { - up->port.type = PORT_16750; - up->capabilities |= UART_CAP_AFE | UART_CAP_SLEEP; - return; - } - - /* - * Try writing and reading the UART_IER_UUE bit (b6). - * If it works, this is probably one of the Xscale platform's - * internal UARTs. - * We're going to explicitly set the UUE bit to 0 before - * trying to write and read a 1 just to make sure it's not - * already a 1 and maybe locked there before we even start start. - */ - iersave = serial_in(up, UART_IER); - serial_outp(up, UART_IER, iersave & ~UART_IER_UUE); - if (!(serial_in(up, UART_IER) & UART_IER_UUE)) { - /* - * OK it's in a known zero state, try writing and reading - * without disturbing the current state of the other bits. - */ - serial_outp(up, UART_IER, iersave | UART_IER_UUE); - if (serial_in(up, UART_IER) & UART_IER_UUE) { - /* - * It's an Xscale. - * We'll leave the UART_IER_UUE bit set to 1 (enabled). - */ - DEBUG_AUTOCONF("Xscale "); - up->port.type = PORT_XSCALE; - up->capabilities |= UART_CAP_UUE; - return; - } - } else { - /* - * If we got here we couldn't force the IER_UUE bit to 0. - * Log it and continue. - */ - DEBUG_AUTOCONF("Couldn't force IER_UUE to 0 "); - } - serial_outp(up, UART_IER, iersave); - - /* - * We distinguish between 16550A and U6 16550A by counting - * how many bytes are in the FIFO. - */ - if (up->port.type == PORT_16550A && size_fifo(up) == 64) { - up->port.type = PORT_U6_16550A; - up->capabilities |= UART_CAP_AFE; - } -} - -/* - * This routine is called by rs_init() to initialize a specific serial - * port. It determines what type of UART chip this serial port is - * using: 8250, 16450, 16550, 16550A. The important question is - * whether or not this UART is a 16550A or not, since this will - * determine whether or not we can use its FIFO features or not. - */ -static void autoconfig(struct uart_8250_port *up, unsigned int probeflags) -{ - unsigned char status1, scratch, scratch2, scratch3; - unsigned char save_lcr, save_mcr; - unsigned long flags; - - if (!up->port.iobase && !up->port.mapbase && !up->port.membase) - return; - - DEBUG_AUTOCONF("ttyS%d: autoconf (0x%04lx, 0x%p): ", - serial_index(&up->port), up->port.iobase, up->port.membase); - - /* - * We really do need global IRQs disabled here - we're going to - * be frobbing the chips IRQ enable register to see if it exists. - */ - spin_lock_irqsave(&up->port.lock, flags); - - up->capabilities = 0; - up->bugs = 0; - - if (!(up->port.flags & UPF_BUGGY_UART)) { - /* - * Do a simple existence test first; if we fail this, - * there's no point trying anything else. - * - * 0x80 is used as a nonsense port to prevent against - * false positives due to ISA bus float. The - * assumption is that 0x80 is a non-existent port; - * which should be safe since include/asm/io.h also - * makes this assumption. - * - * Note: this is safe as long as MCR bit 4 is clear - * and the device is in "PC" mode. - */ - scratch = serial_inp(up, UART_IER); - serial_outp(up, UART_IER, 0); -#ifdef __i386__ - outb(0xff, 0x080); -#endif - /* - * Mask out IER[7:4] bits for test as some UARTs (e.g. TL - * 16C754B) allow only to modify them if an EFR bit is set. - */ - scratch2 = serial_inp(up, UART_IER) & 0x0f; - serial_outp(up, UART_IER, 0x0F); -#ifdef __i386__ - outb(0, 0x080); -#endif - scratch3 = serial_inp(up, UART_IER) & 0x0f; - serial_outp(up, UART_IER, scratch); - if (scratch2 != 0 || scratch3 != 0x0F) { - /* - * We failed; there's nothing here - */ - DEBUG_AUTOCONF("IER test failed (%02x, %02x) ", - scratch2, scratch3); - goto out; - } - } - - save_mcr = serial_in(up, UART_MCR); - save_lcr = serial_in(up, UART_LCR); - - /* - * Check to see if a UART is really there. Certain broken - * internal modems based on the Rockwell chipset fail this - * test, because they apparently don't implement the loopback - * test mode. So this test is skipped on the COM 1 through - * COM 4 ports. This *should* be safe, since no board - * manufacturer would be stupid enough to design a board - * that conflicts with COM 1-4 --- we hope! - */ - if (!(up->port.flags & UPF_SKIP_TEST)) { - serial_outp(up, UART_MCR, UART_MCR_LOOP | 0x0A); - status1 = serial_inp(up, UART_MSR) & 0xF0; - serial_outp(up, UART_MCR, save_mcr); - if (status1 != 0x90) { - DEBUG_AUTOCONF("LOOP test failed (%02x) ", - status1); - goto out; - } - } - - /* - * We're pretty sure there's a port here. Lets find out what - * type of port it is. The IIR top two bits allows us to find - * out if it's 8250 or 16450, 16550, 16550A or later. This - * determines what we test for next. - * - * We also initialise the EFR (if any) to zero for later. The - * EFR occupies the same register location as the FCR and IIR. - */ - serial_outp(up, UART_LCR, UART_LCR_CONF_MODE_B); - serial_outp(up, UART_EFR, 0); - serial_outp(up, UART_LCR, 0); - - serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); - scratch = serial_in(up, UART_IIR) >> 6; - - DEBUG_AUTOCONF("iir=%d ", scratch); - - switch (scratch) { - case 0: - autoconfig_8250(up); - break; - case 1: - up->port.type = PORT_UNKNOWN; - break; - case 2: - up->port.type = PORT_16550; - break; - case 3: - autoconfig_16550a(up); - break; - } - -#ifdef CONFIG_SERIAL_8250_RSA - /* - * Only probe for RSA ports if we got the region. - */ - if (up->port.type == PORT_16550A && probeflags & PROBE_RSA) { - int i; - - for (i = 0 ; i < probe_rsa_count; ++i) { - if (probe_rsa[i] == up->port.iobase && - __enable_rsa(up)) { - up->port.type = PORT_RSA; - break; - } - } - } -#endif - - serial_outp(up, UART_LCR, save_lcr); - - if (up->capabilities != uart_config[up->port.type].flags) { - printk(KERN_WARNING - "ttyS%d: detected caps %08x should be %08x\n", - serial_index(&up->port), up->capabilities, - uart_config[up->port.type].flags); - } - - up->port.fifosize = uart_config[up->port.type].fifo_size; - up->capabilities = uart_config[up->port.type].flags; - up->tx_loadsz = uart_config[up->port.type].tx_loadsz; - - if (up->port.type == PORT_UNKNOWN) - goto out; - - /* - * Reset the UART. - */ -#ifdef CONFIG_SERIAL_8250_RSA - if (up->port.type == PORT_RSA) - serial_outp(up, UART_RSA_FRR, 0); -#endif - serial_outp(up, UART_MCR, save_mcr); - serial8250_clear_fifos(up); - serial_in(up, UART_RX); - if (up->capabilities & UART_CAP_UUE) - serial_outp(up, UART_IER, UART_IER_UUE); - else - serial_outp(up, UART_IER, 0); - - out: - spin_unlock_irqrestore(&up->port.lock, flags); - DEBUG_AUTOCONF("type=%s\n", uart_config[up->port.type].name); -} - -static void autoconfig_irq(struct uart_8250_port *up) -{ - unsigned char save_mcr, save_ier; - unsigned char save_ICP = 0; - unsigned int ICP = 0; - unsigned long irqs; - int irq; - - if (up->port.flags & UPF_FOURPORT) { - ICP = (up->port.iobase & 0xfe0) | 0x1f; - save_ICP = inb_p(ICP); - outb_p(0x80, ICP); - (void) inb_p(ICP); - } - - /* forget possible initially masked and pending IRQ */ - probe_irq_off(probe_irq_on()); - save_mcr = serial_inp(up, UART_MCR); - save_ier = serial_inp(up, UART_IER); - serial_outp(up, UART_MCR, UART_MCR_OUT1 | UART_MCR_OUT2); - - irqs = probe_irq_on(); - serial_outp(up, UART_MCR, 0); - udelay(10); - if (up->port.flags & UPF_FOURPORT) { - serial_outp(up, UART_MCR, - UART_MCR_DTR | UART_MCR_RTS); - } else { - serial_outp(up, UART_MCR, - UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2); - } - serial_outp(up, UART_IER, 0x0f); /* enable all intrs */ - (void)serial_inp(up, UART_LSR); - (void)serial_inp(up, UART_RX); - (void)serial_inp(up, UART_IIR); - (void)serial_inp(up, UART_MSR); - serial_outp(up, UART_TX, 0xFF); - udelay(20); - irq = probe_irq_off(irqs); - - serial_outp(up, UART_MCR, save_mcr); - serial_outp(up, UART_IER, save_ier); - - if (up->port.flags & UPF_FOURPORT) - outb_p(save_ICP, ICP); - - up->port.irq = (irq > 0) ? irq : 0; -} - -static inline void __stop_tx(struct uart_8250_port *p) -{ - if (p->ier & UART_IER_THRI) { - p->ier &= ~UART_IER_THRI; - serial_out(p, UART_IER, p->ier); - } -} - -static void serial8250_stop_tx(struct uart_port *port) -{ - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - - __stop_tx(up); - - /* - * We really want to stop the transmitter from sending. - */ - if (up->port.type == PORT_16C950) { - up->acr |= UART_ACR_TXDIS; - serial_icr_write(up, UART_ACR, up->acr); - } -} - -static void transmit_chars(struct uart_8250_port *up); - -static void serial8250_start_tx(struct uart_port *port) -{ - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - - if (!(up->ier & UART_IER_THRI)) { - up->ier |= UART_IER_THRI; - serial_out(up, UART_IER, up->ier); - - if (up->bugs & UART_BUG_TXEN) { - unsigned char lsr; - lsr = serial_in(up, UART_LSR); - up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS; - if ((up->port.type == PORT_RM9000) ? - (lsr & UART_LSR_THRE) : - (lsr & UART_LSR_TEMT)) - transmit_chars(up); - } - } - - /* - * Re-enable the transmitter if we disabled it. - */ - if (up->port.type == PORT_16C950 && up->acr & UART_ACR_TXDIS) { - up->acr &= ~UART_ACR_TXDIS; - serial_icr_write(up, UART_ACR, up->acr); - } -} - -static void serial8250_stop_rx(struct uart_port *port) -{ - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - - up->ier &= ~UART_IER_RLSI; - up->port.read_status_mask &= ~UART_LSR_DR; - serial_out(up, UART_IER, up->ier); -} - -static void serial8250_enable_ms(struct uart_port *port) -{ - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - - /* no MSR capabilities */ - if (up->bugs & UART_BUG_NOMSR) - return; - - up->ier |= UART_IER_MSI; - serial_out(up, UART_IER, up->ier); -} - -static void -receive_chars(struct uart_8250_port *up, unsigned int *status) -{ - struct tty_struct *tty = up->port.state->port.tty; - unsigned char ch, lsr = *status; - int max_count = 256; - char flag; - - do { - if (likely(lsr & UART_LSR_DR)) - ch = serial_inp(up, UART_RX); - else - /* - * Intel 82571 has a Serial Over Lan device that will - * set UART_LSR_BI without setting UART_LSR_DR when - * it receives a break. To avoid reading from the - * receive buffer without UART_LSR_DR bit set, we - * just force the read character to be 0 - */ - ch = 0; - - flag = TTY_NORMAL; - up->port.icount.rx++; - - lsr |= up->lsr_saved_flags; - up->lsr_saved_flags = 0; - - if (unlikely(lsr & UART_LSR_BRK_ERROR_BITS)) { - /* - * For statistics only - */ - if (lsr & UART_LSR_BI) { - lsr &= ~(UART_LSR_FE | UART_LSR_PE); - up->port.icount.brk++; - /* - * We do the SysRQ and SAK checking - * here because otherwise the break - * may get masked by ignore_status_mask - * or read_status_mask. - */ - if (uart_handle_break(&up->port)) - goto ignore_char; - } else if (lsr & UART_LSR_PE) - up->port.icount.parity++; - else if (lsr & UART_LSR_FE) - up->port.icount.frame++; - if (lsr & UART_LSR_OE) - up->port.icount.overrun++; - - /* - * Mask off conditions which should be ignored. - */ - lsr &= up->port.read_status_mask; - - if (lsr & UART_LSR_BI) { - DEBUG_INTR("handling break...."); - flag = TTY_BREAK; - } else if (lsr & UART_LSR_PE) - flag = TTY_PARITY; - else if (lsr & UART_LSR_FE) - flag = TTY_FRAME; - } - if (uart_handle_sysrq_char(&up->port, ch)) - goto ignore_char; - - uart_insert_char(&up->port, lsr, UART_LSR_OE, ch, flag); - -ignore_char: - lsr = serial_inp(up, UART_LSR); - } while ((lsr & (UART_LSR_DR | UART_LSR_BI)) && (max_count-- > 0)); - spin_unlock(&up->port.lock); - tty_flip_buffer_push(tty); - spin_lock(&up->port.lock); - *status = lsr; -} - -static void transmit_chars(struct uart_8250_port *up) -{ - struct circ_buf *xmit = &up->port.state->xmit; - int count; - - if (up->port.x_char) { - serial_outp(up, UART_TX, up->port.x_char); - up->port.icount.tx++; - up->port.x_char = 0; - return; - } - if (uart_tx_stopped(&up->port)) { - serial8250_stop_tx(&up->port); - return; - } - if (uart_circ_empty(xmit)) { - __stop_tx(up); - return; - } - - count = up->tx_loadsz; - do { - serial_out(up, UART_TX, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - up->port.icount.tx++; - if (uart_circ_empty(xmit)) - break; - } while (--count > 0); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&up->port); - - DEBUG_INTR("THRE..."); - - if (uart_circ_empty(xmit)) - __stop_tx(up); -} - -static unsigned int check_modem_status(struct uart_8250_port *up) -{ - unsigned int status = serial_in(up, UART_MSR); - - status |= up->msr_saved_flags; - up->msr_saved_flags = 0; - if (status & UART_MSR_ANY_DELTA && up->ier & UART_IER_MSI && - up->port.state != NULL) { - if (status & UART_MSR_TERI) - up->port.icount.rng++; - if (status & UART_MSR_DDSR) - up->port.icount.dsr++; - if (status & UART_MSR_DDCD) - uart_handle_dcd_change(&up->port, status & UART_MSR_DCD); - if (status & UART_MSR_DCTS) - uart_handle_cts_change(&up->port, status & UART_MSR_CTS); - - wake_up_interruptible(&up->port.state->port.delta_msr_wait); - } - - return status; -} - -/* - * This handles the interrupt from one port. - */ -static void serial8250_handle_port(struct uart_8250_port *up) -{ - unsigned int status; - unsigned long flags; - - spin_lock_irqsave(&up->port.lock, flags); - - status = serial_inp(up, UART_LSR); - - DEBUG_INTR("status = %x...", status); - - if (status & (UART_LSR_DR | UART_LSR_BI)) - receive_chars(up, &status); - check_modem_status(up); - if (status & UART_LSR_THRE) - transmit_chars(up); - - spin_unlock_irqrestore(&up->port.lock, flags); -} - -/* - * This is the serial driver's interrupt routine. - * - * Arjan thinks the old way was overly complex, so it got simplified. - * Alan disagrees, saying that need the complexity to handle the weird - * nature of ISA shared interrupts. (This is a special exception.) - * - * In order to handle ISA shared interrupts properly, we need to check - * that all ports have been serviced, and therefore the ISA interrupt - * line has been de-asserted. - * - * This means we need to loop through all ports. checking that they - * don't have an interrupt pending. - */ -static irqreturn_t serial8250_interrupt(int irq, void *dev_id) -{ - struct irq_info *i = dev_id; - struct list_head *l, *end = NULL; - int pass_counter = 0, handled = 0; - - DEBUG_INTR("serial8250_interrupt(%d)...", irq); - - spin_lock(&i->lock); - - l = i->head; - do { - struct uart_8250_port *up; - unsigned int iir; - - up = list_entry(l, struct uart_8250_port, list); - - iir = serial_in(up, UART_IIR); - if (!(iir & UART_IIR_NO_INT)) { - serial8250_handle_port(up); - - handled = 1; - - end = NULL; - } else if ((up->port.iotype == UPIO_DWAPB || - up->port.iotype == UPIO_DWAPB32) && - (iir & UART_IIR_BUSY) == UART_IIR_BUSY) { - /* The DesignWare APB UART has an Busy Detect (0x07) - * interrupt meaning an LCR write attempt occured while the - * UART was busy. The interrupt must be cleared by reading - * the UART status register (USR) and the LCR re-written. */ - unsigned int status; - status = *(volatile u32 *)up->port.private_data; - serial_out(up, UART_LCR, up->lcr); - - handled = 1; - - end = NULL; - } else if (end == NULL) - end = l; - - l = l->next; - - if (l == i->head && pass_counter++ > PASS_LIMIT) { - /* If we hit this, we're dead. */ - printk_ratelimited(KERN_ERR - "serial8250: too much work for irq%d\n", irq); - break; - } - } while (l != end); - - spin_unlock(&i->lock); - - DEBUG_INTR("end.\n"); - - return IRQ_RETVAL(handled); -} - -/* - * To support ISA shared interrupts, we need to have one interrupt - * handler that ensures that the IRQ line has been deasserted - * before returning. Failing to do this will result in the IRQ - * line being stuck active, and, since ISA irqs are edge triggered, - * no more IRQs will be seen. - */ -static void serial_do_unlink(struct irq_info *i, struct uart_8250_port *up) -{ - spin_lock_irq(&i->lock); - - if (!list_empty(i->head)) { - if (i->head == &up->list) - i->head = i->head->next; - list_del(&up->list); - } else { - BUG_ON(i->head != &up->list); - i->head = NULL; - } - spin_unlock_irq(&i->lock); - /* List empty so throw away the hash node */ - if (i->head == NULL) { - hlist_del(&i->node); - kfree(i); - } -} - -static int serial_link_irq_chain(struct uart_8250_port *up) -{ - struct hlist_head *h; - struct hlist_node *n; - struct irq_info *i; - int ret, irq_flags = up->port.flags & UPF_SHARE_IRQ ? IRQF_SHARED : 0; - - mutex_lock(&hash_mutex); - - h = &irq_lists[up->port.irq % NR_IRQ_HASH]; - - hlist_for_each(n, h) { - i = hlist_entry(n, struct irq_info, node); - if (i->irq == up->port.irq) - break; - } - - if (n == NULL) { - i = kzalloc(sizeof(struct irq_info), GFP_KERNEL); - if (i == NULL) { - mutex_unlock(&hash_mutex); - return -ENOMEM; - } - spin_lock_init(&i->lock); - i->irq = up->port.irq; - hlist_add_head(&i->node, h); - } - mutex_unlock(&hash_mutex); - - spin_lock_irq(&i->lock); - - if (i->head) { - list_add(&up->list, i->head); - spin_unlock_irq(&i->lock); - - ret = 0; - } else { - INIT_LIST_HEAD(&up->list); - i->head = &up->list; - spin_unlock_irq(&i->lock); - irq_flags |= up->port.irqflags; - ret = request_irq(up->port.irq, serial8250_interrupt, - irq_flags, "serial", i); - if (ret < 0) - serial_do_unlink(i, up); - } - - return ret; -} - -static void serial_unlink_irq_chain(struct uart_8250_port *up) -{ - struct irq_info *i; - struct hlist_node *n; - struct hlist_head *h; - - mutex_lock(&hash_mutex); - - h = &irq_lists[up->port.irq % NR_IRQ_HASH]; - - hlist_for_each(n, h) { - i = hlist_entry(n, struct irq_info, node); - if (i->irq == up->port.irq) - break; - } - - BUG_ON(n == NULL); - BUG_ON(i->head == NULL); - - if (list_empty(i->head)) - free_irq(up->port.irq, i); - - serial_do_unlink(i, up); - mutex_unlock(&hash_mutex); -} - -/* - * This function is used to handle ports that do not have an - * interrupt. This doesn't work very well for 16450's, but gives - * barely passable results for a 16550A. (Although at the expense - * of much CPU overhead). - */ -static void serial8250_timeout(unsigned long data) -{ - struct uart_8250_port *up = (struct uart_8250_port *)data; - unsigned int iir; - - iir = serial_in(up, UART_IIR); - if (!(iir & UART_IIR_NO_INT)) - serial8250_handle_port(up); - mod_timer(&up->timer, jiffies + uart_poll_timeout(&up->port)); -} - -static void serial8250_backup_timeout(unsigned long data) -{ - struct uart_8250_port *up = (struct uart_8250_port *)data; - unsigned int iir, ier = 0, lsr; - unsigned long flags; - - /* - * Must disable interrupts or else we risk racing with the interrupt - * based handler. - */ - if (is_real_interrupt(up->port.irq)) { - ier = serial_in(up, UART_IER); - serial_out(up, UART_IER, 0); - } - - iir = serial_in(up, UART_IIR); - - /* - * This should be a safe test for anyone who doesn't trust the - * IIR bits on their UART, but it's specifically designed for - * the "Diva" UART used on the management processor on many HP - * ia64 and parisc boxes. - */ - spin_lock_irqsave(&up->port.lock, flags); - lsr = serial_in(up, UART_LSR); - up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS; - spin_unlock_irqrestore(&up->port.lock, flags); - if ((iir & UART_IIR_NO_INT) && (up->ier & UART_IER_THRI) && - (!uart_circ_empty(&up->port.state->xmit) || up->port.x_char) && - (lsr & UART_LSR_THRE)) { - iir &= ~(UART_IIR_ID | UART_IIR_NO_INT); - iir |= UART_IIR_THRI; - } - - if (!(iir & UART_IIR_NO_INT)) - serial8250_handle_port(up); - - if (is_real_interrupt(up->port.irq)) - serial_out(up, UART_IER, ier); - - /* Standard timer interval plus 0.2s to keep the port running */ - mod_timer(&up->timer, - jiffies + uart_poll_timeout(&up->port) + HZ / 5); -} - -static unsigned int serial8250_tx_empty(struct uart_port *port) -{ - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - unsigned long flags; - unsigned int lsr; - - spin_lock_irqsave(&up->port.lock, flags); - lsr = serial_in(up, UART_LSR); - up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS; - spin_unlock_irqrestore(&up->port.lock, flags); - - return (lsr & BOTH_EMPTY) == BOTH_EMPTY ? TIOCSER_TEMT : 0; -} - -static unsigned int serial8250_get_mctrl(struct uart_port *port) -{ - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - unsigned int status; - unsigned int ret; - - status = check_modem_status(up); - - ret = 0; - if (status & UART_MSR_DCD) - ret |= TIOCM_CAR; - if (status & UART_MSR_RI) - ret |= TIOCM_RNG; - if (status & UART_MSR_DSR) - ret |= TIOCM_DSR; - if (status & UART_MSR_CTS) - ret |= TIOCM_CTS; - return ret; -} - -static void serial8250_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - unsigned char mcr = 0; - - if (mctrl & TIOCM_RTS) - mcr |= UART_MCR_RTS; - if (mctrl & TIOCM_DTR) - mcr |= UART_MCR_DTR; - if (mctrl & TIOCM_OUT1) - mcr |= UART_MCR_OUT1; - if (mctrl & TIOCM_OUT2) - mcr |= UART_MCR_OUT2; - if (mctrl & TIOCM_LOOP) - mcr |= UART_MCR_LOOP; - - mcr = (mcr & up->mcr_mask) | up->mcr_force | up->mcr; - - serial_out(up, UART_MCR, mcr); -} - -static void serial8250_break_ctl(struct uart_port *port, int break_state) -{ - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - unsigned long flags; - - spin_lock_irqsave(&up->port.lock, flags); - if (break_state == -1) - up->lcr |= UART_LCR_SBC; - else - up->lcr &= ~UART_LCR_SBC; - serial_out(up, UART_LCR, up->lcr); - spin_unlock_irqrestore(&up->port.lock, flags); -} - -/* - * Wait for transmitter & holding register to empty - */ -static void wait_for_xmitr(struct uart_8250_port *up, int bits) -{ - unsigned int status, tmout = 10000; - - /* Wait up to 10ms for the character(s) to be sent. */ - for (;;) { - status = serial_in(up, UART_LSR); - - up->lsr_saved_flags |= status & LSR_SAVE_FLAGS; - - if ((status & bits) == bits) - break; - if (--tmout == 0) - break; - udelay(1); - } - - /* Wait up to 1s for flow control if necessary */ - if (up->port.flags & UPF_CONS_FLOW) { - unsigned int tmout; - for (tmout = 1000000; tmout; tmout--) { - unsigned int msr = serial_in(up, UART_MSR); - up->msr_saved_flags |= msr & MSR_SAVE_FLAGS; - if (msr & UART_MSR_CTS) - break; - udelay(1); - touch_nmi_watchdog(); - } - } -} - -#ifdef CONFIG_CONSOLE_POLL -/* - * Console polling routines for writing and reading from the uart while - * in an interrupt or debug context. - */ - -static int serial8250_get_poll_char(struct uart_port *port) -{ - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - unsigned char lsr = serial_inp(up, UART_LSR); - - if (!(lsr & UART_LSR_DR)) - return NO_POLL_CHAR; - - return serial_inp(up, UART_RX); -} - - -static void serial8250_put_poll_char(struct uart_port *port, - unsigned char c) -{ - unsigned int ier; - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - - /* - * First save the IER then disable the interrupts - */ - ier = serial_in(up, UART_IER); - if (up->capabilities & UART_CAP_UUE) - serial_out(up, UART_IER, UART_IER_UUE); - else - serial_out(up, UART_IER, 0); - - wait_for_xmitr(up, BOTH_EMPTY); - /* - * Send the character out. - * If a LF, also do CR... - */ - serial_out(up, UART_TX, c); - if (c == 10) { - wait_for_xmitr(up, BOTH_EMPTY); - serial_out(up, UART_TX, 13); - } - - /* - * Finally, wait for transmitter to become empty - * and restore the IER - */ - wait_for_xmitr(up, BOTH_EMPTY); - serial_out(up, UART_IER, ier); -} - -#endif /* CONFIG_CONSOLE_POLL */ - -static int serial8250_startup(struct uart_port *port) -{ - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - unsigned long flags; - unsigned char lsr, iir; - int retval; - - up->port.fifosize = uart_config[up->port.type].fifo_size; - up->tx_loadsz = uart_config[up->port.type].tx_loadsz; - up->capabilities = uart_config[up->port.type].flags; - up->mcr = 0; - - if (up->port.iotype != up->cur_iotype) - set_io_from_upio(port); - - if (up->port.type == PORT_16C950) { - /* Wake up and initialize UART */ - up->acr = 0; - serial_outp(up, UART_LCR, UART_LCR_CONF_MODE_B); - serial_outp(up, UART_EFR, UART_EFR_ECB); - serial_outp(up, UART_IER, 0); - serial_outp(up, UART_LCR, 0); - serial_icr_write(up, UART_CSR, 0); /* Reset the UART */ - serial_outp(up, UART_LCR, 0xBF); - serial_outp(up, UART_EFR, UART_EFR_ECB); - serial_outp(up, UART_LCR, 0); - } - -#ifdef CONFIG_SERIAL_8250_RSA - /* - * If this is an RSA port, see if we can kick it up to the - * higher speed clock. - */ - enable_rsa(up); -#endif - - /* - * Clear the FIFO buffers and disable them. - * (they will be reenabled in set_termios()) - */ - serial8250_clear_fifos(up); - - /* - * Clear the interrupt registers. - */ - (void) serial_inp(up, UART_LSR); - (void) serial_inp(up, UART_RX); - (void) serial_inp(up, UART_IIR); - (void) serial_inp(up, UART_MSR); - - /* - * At this point, there's no way the LSR could still be 0xff; - * if it is, then bail out, because there's likely no UART - * here. - */ - if (!(up->port.flags & UPF_BUGGY_UART) && - (serial_inp(up, UART_LSR) == 0xff)) { - printk(KERN_INFO "ttyS%d: LSR safety check engaged!\n", - serial_index(&up->port)); - return -ENODEV; - } - - /* - * For a XR16C850, we need to set the trigger levels - */ - if (up->port.type == PORT_16850) { - unsigned char fctr; - - serial_outp(up, UART_LCR, UART_LCR_CONF_MODE_B); - - fctr = serial_inp(up, UART_FCTR) & ~(UART_FCTR_RX|UART_FCTR_TX); - serial_outp(up, UART_FCTR, fctr | UART_FCTR_TRGD | UART_FCTR_RX); - serial_outp(up, UART_TRG, UART_TRG_96); - serial_outp(up, UART_FCTR, fctr | UART_FCTR_TRGD | UART_FCTR_TX); - serial_outp(up, UART_TRG, UART_TRG_96); - - serial_outp(up, UART_LCR, 0); - } - - if (is_real_interrupt(up->port.irq)) { - unsigned char iir1; - /* - * Test for UARTs that do not reassert THRE when the - * transmitter is idle and the interrupt has already - * been cleared. Real 16550s should always reassert - * this interrupt whenever the transmitter is idle and - * the interrupt is enabled. Delays are necessary to - * allow register changes to become visible. - */ - spin_lock_irqsave(&up->port.lock, flags); - if (up->port.irqflags & IRQF_SHARED) - disable_irq_nosync(up->port.irq); - - wait_for_xmitr(up, UART_LSR_THRE); - serial_out_sync(up, UART_IER, UART_IER_THRI); - udelay(1); /* allow THRE to set */ - iir1 = serial_in(up, UART_IIR); - serial_out(up, UART_IER, 0); - serial_out_sync(up, UART_IER, UART_IER_THRI); - udelay(1); /* allow a working UART time to re-assert THRE */ - iir = serial_in(up, UART_IIR); - serial_out(up, UART_IER, 0); - - if (up->port.irqflags & IRQF_SHARED) - enable_irq(up->port.irq); - spin_unlock_irqrestore(&up->port.lock, flags); - - /* - * If the interrupt is not reasserted, setup a timer to - * kick the UART on a regular basis. - */ - if (!(iir1 & UART_IIR_NO_INT) && (iir & UART_IIR_NO_INT)) { - up->bugs |= UART_BUG_THRE; - pr_debug("ttyS%d - using backup timer\n", - serial_index(port)); - } - } - - /* - * The above check will only give an accurate result the first time - * the port is opened so this value needs to be preserved. - */ - if (up->bugs & UART_BUG_THRE) { - up->timer.function = serial8250_backup_timeout; - up->timer.data = (unsigned long)up; - mod_timer(&up->timer, jiffies + - uart_poll_timeout(port) + HZ / 5); - } - - /* - * If the "interrupt" for this port doesn't correspond with any - * hardware interrupt, we use a timer-based system. The original - * driver used to do this with IRQ0. - */ - if (!is_real_interrupt(up->port.irq)) { - up->timer.data = (unsigned long)up; - mod_timer(&up->timer, jiffies + uart_poll_timeout(port)); - } else { - retval = serial_link_irq_chain(up); - if (retval) - return retval; - } - - /* - * Now, initialize the UART - */ - serial_outp(up, UART_LCR, UART_LCR_WLEN8); - - spin_lock_irqsave(&up->port.lock, flags); - if (up->port.flags & UPF_FOURPORT) { - if (!is_real_interrupt(up->port.irq)) - up->port.mctrl |= TIOCM_OUT1; - } else - /* - * Most PC uarts need OUT2 raised to enable interrupts. - */ - if (is_real_interrupt(up->port.irq)) - up->port.mctrl |= TIOCM_OUT2; - - serial8250_set_mctrl(&up->port, up->port.mctrl); - - /* Serial over Lan (SoL) hack: - Intel 8257x Gigabit ethernet chips have a - 16550 emulation, to be used for Serial Over Lan. - Those chips take a longer time than a normal - serial device to signalize that a transmission - data was queued. Due to that, the above test generally - fails. One solution would be to delay the reading of - iir. However, this is not reliable, since the timeout - is variable. So, let's just don't test if we receive - TX irq. This way, we'll never enable UART_BUG_TXEN. - */ - if (skip_txen_test || up->port.flags & UPF_NO_TXEN_TEST) - goto dont_test_tx_en; - - /* - * Do a quick test to see if we receive an - * interrupt when we enable the TX irq. - */ - serial_outp(up, UART_IER, UART_IER_THRI); - lsr = serial_in(up, UART_LSR); - iir = serial_in(up, UART_IIR); - serial_outp(up, UART_IER, 0); - - if (lsr & UART_LSR_TEMT && iir & UART_IIR_NO_INT) { - if (!(up->bugs & UART_BUG_TXEN)) { - up->bugs |= UART_BUG_TXEN; - pr_debug("ttyS%d - enabling bad tx status workarounds\n", - serial_index(port)); - } - } else { - up->bugs &= ~UART_BUG_TXEN; - } - -dont_test_tx_en: - spin_unlock_irqrestore(&up->port.lock, flags); - - /* - * Clear the interrupt registers again for luck, and clear the - * saved flags to avoid getting false values from polling - * routines or the previous session. - */ - serial_inp(up, UART_LSR); - serial_inp(up, UART_RX); - serial_inp(up, UART_IIR); - serial_inp(up, UART_MSR); - up->lsr_saved_flags = 0; - up->msr_saved_flags = 0; - - /* - * Finally, enable interrupts. Note: Modem status interrupts - * are set via set_termios(), which will be occurring imminently - * anyway, so we don't enable them here. - */ - up->ier = UART_IER_RLSI | UART_IER_RDI; - serial_outp(up, UART_IER, up->ier); - - if (up->port.flags & UPF_FOURPORT) { - unsigned int icp; - /* - * Enable interrupts on the AST Fourport board - */ - icp = (up->port.iobase & 0xfe0) | 0x01f; - outb_p(0x80, icp); - (void) inb_p(icp); - } - - return 0; -} - -static void serial8250_shutdown(struct uart_port *port) -{ - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - unsigned long flags; - - /* - * Disable interrupts from this port - */ - up->ier = 0; - serial_outp(up, UART_IER, 0); - - spin_lock_irqsave(&up->port.lock, flags); - if (up->port.flags & UPF_FOURPORT) { - /* reset interrupts on the AST Fourport board */ - inb((up->port.iobase & 0xfe0) | 0x1f); - up->port.mctrl |= TIOCM_OUT1; - } else - up->port.mctrl &= ~TIOCM_OUT2; - - serial8250_set_mctrl(&up->port, up->port.mctrl); - spin_unlock_irqrestore(&up->port.lock, flags); - - /* - * Disable break condition and FIFOs - */ - serial_out(up, UART_LCR, serial_inp(up, UART_LCR) & ~UART_LCR_SBC); - serial8250_clear_fifos(up); - -#ifdef CONFIG_SERIAL_8250_RSA - /* - * Reset the RSA board back to 115kbps compat mode. - */ - disable_rsa(up); -#endif - - /* - * Read data port to reset things, and then unlink from - * the IRQ chain. - */ - (void) serial_in(up, UART_RX); - - del_timer_sync(&up->timer); - up->timer.function = serial8250_timeout; - if (is_real_interrupt(up->port.irq)) - serial_unlink_irq_chain(up); -} - -static unsigned int serial8250_get_divisor(struct uart_port *port, unsigned int baud) -{ - unsigned int quot; - - /* - * Handle magic divisors for baud rates above baud_base on - * SMSC SuperIO chips. - */ - if ((port->flags & UPF_MAGIC_MULTIPLIER) && - baud == (port->uartclk/4)) - quot = 0x8001; - else if ((port->flags & UPF_MAGIC_MULTIPLIER) && - baud == (port->uartclk/8)) - quot = 0x8002; - else - quot = uart_get_divisor(port, baud); - - return quot; -} - -void -serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - unsigned char cval, fcr = 0; - unsigned long flags; - unsigned int baud, quot; - - switch (termios->c_cflag & CSIZE) { - case CS5: - cval = UART_LCR_WLEN5; - break; - case CS6: - cval = UART_LCR_WLEN6; - break; - case CS7: - cval = UART_LCR_WLEN7; - break; - default: - case CS8: - cval = UART_LCR_WLEN8; - break; - } - - if (termios->c_cflag & CSTOPB) - cval |= UART_LCR_STOP; - if (termios->c_cflag & PARENB) - cval |= UART_LCR_PARITY; - if (!(termios->c_cflag & PARODD)) - cval |= UART_LCR_EPAR; -#ifdef CMSPAR - if (termios->c_cflag & CMSPAR) - cval |= UART_LCR_SPAR; -#endif - - /* - * Ask the core to calculate the divisor for us. - */ - baud = uart_get_baud_rate(port, termios, old, - port->uartclk / 16 / 0xffff, - port->uartclk / 16); - quot = serial8250_get_divisor(port, baud); - - /* - * Oxford Semi 952 rev B workaround - */ - if (up->bugs & UART_BUG_QUOT && (quot & 0xff) == 0) - quot++; - - if (up->capabilities & UART_CAP_FIFO && up->port.fifosize > 1) { - if (baud < 2400) - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1; - else - fcr = uart_config[up->port.type].fcr; - } - - /* - * MCR-based auto flow control. When AFE is enabled, RTS will be - * deasserted when the receive FIFO contains more characters than - * the trigger, or the MCR RTS bit is cleared. In the case where - * the remote UART is not using CTS auto flow control, we must - * have sufficient FIFO entries for the latency of the remote - * UART to respond. IOW, at least 32 bytes of FIFO. - */ - if (up->capabilities & UART_CAP_AFE && up->port.fifosize >= 32) { - up->mcr &= ~UART_MCR_AFE; - if (termios->c_cflag & CRTSCTS) - up->mcr |= UART_MCR_AFE; - } - - /* - * Ok, we're now changing the port state. Do it with - * interrupts disabled. - */ - spin_lock_irqsave(&up->port.lock, flags); - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; - if (termios->c_iflag & INPCK) - up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; - if (termios->c_iflag & (BRKINT | PARMRK)) - up->port.read_status_mask |= UART_LSR_BI; - - /* - * Characteres to ignore - */ - up->port.ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; - if (termios->c_iflag & IGNBRK) { - up->port.ignore_status_mask |= UART_LSR_BI; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - up->port.ignore_status_mask |= UART_LSR_OE; - } - - /* - * ignore all characters if CREAD is not set - */ - if ((termios->c_cflag & CREAD) == 0) - up->port.ignore_status_mask |= UART_LSR_DR; - - /* - * CTS flow control flag and modem status interrupts - */ - up->ier &= ~UART_IER_MSI; - if (!(up->bugs & UART_BUG_NOMSR) && - UART_ENABLE_MS(&up->port, termios->c_cflag)) - up->ier |= UART_IER_MSI; - if (up->capabilities & UART_CAP_UUE) - up->ier |= UART_IER_UUE | UART_IER_RTOIE; - - serial_out(up, UART_IER, up->ier); - - if (up->capabilities & UART_CAP_EFR) { - unsigned char efr = 0; - /* - * TI16C752/Startech hardware flow control. FIXME: - * - TI16C752 requires control thresholds to be set. - * - UART_MCR_RTS is ineffective if auto-RTS mode is enabled. - */ - if (termios->c_cflag & CRTSCTS) - efr |= UART_EFR_CTS; - - serial_outp(up, UART_LCR, UART_LCR_CONF_MODE_B); - serial_outp(up, UART_EFR, efr); - } - -#ifdef CONFIG_ARCH_OMAP - /* Workaround to enable 115200 baud on OMAP1510 internal ports */ - if (cpu_is_omap1510() && is_omap_port(up)) { - if (baud == 115200) { - quot = 1; - serial_out(up, UART_OMAP_OSC_12M_SEL, 1); - } else - serial_out(up, UART_OMAP_OSC_12M_SEL, 0); - } -#endif - - if (up->capabilities & UART_NATSEMI) { - /* Switch to bank 2 not bank 1, to avoid resetting EXCR2 */ - serial_outp(up, UART_LCR, 0xe0); - } else { - serial_outp(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */ - } - - serial_dl_write(up, quot); - - /* - * LCR DLAB must be set to enable 64-byte FIFO mode. If the FCR - * is written without DLAB set, this mode will be disabled. - */ - if (up->port.type == PORT_16750) - serial_outp(up, UART_FCR, fcr); - - serial_outp(up, UART_LCR, cval); /* reset DLAB */ - up->lcr = cval; /* Save LCR */ - if (up->port.type != PORT_16750) { - if (fcr & UART_FCR_ENABLE_FIFO) { - /* emulated UARTs (Lucent Venus 167x) need two steps */ - serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); - } - serial_outp(up, UART_FCR, fcr); /* set fcr */ - } - serial8250_set_mctrl(&up->port, up->port.mctrl); - spin_unlock_irqrestore(&up->port.lock, flags); - /* Don't rewrite B0 */ - if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); -} -EXPORT_SYMBOL(serial8250_do_set_termios); - -static void -serial8250_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - if (port->set_termios) - port->set_termios(port, termios, old); - else - serial8250_do_set_termios(port, termios, old); -} - -static void -serial8250_set_ldisc(struct uart_port *port, int new) -{ - if (new == N_PPS) { - port->flags |= UPF_HARDPPS_CD; - serial8250_enable_ms(port); - } else - port->flags &= ~UPF_HARDPPS_CD; -} - - -void serial8250_do_pm(struct uart_port *port, unsigned int state, - unsigned int oldstate) -{ - struct uart_8250_port *p = - container_of(port, struct uart_8250_port, port); - - serial8250_set_sleep(p, state != 0); -} -EXPORT_SYMBOL(serial8250_do_pm); - -static void -serial8250_pm(struct uart_port *port, unsigned int state, - unsigned int oldstate) -{ - if (port->pm) - port->pm(port, state, oldstate); - else - serial8250_do_pm(port, state, oldstate); -} - -static unsigned int serial8250_port_size(struct uart_8250_port *pt) -{ - if (pt->port.iotype == UPIO_AU) - return 0x1000; -#ifdef CONFIG_ARCH_OMAP - if (is_omap_port(pt)) - return 0x16 << pt->port.regshift; -#endif - return 8 << pt->port.regshift; -} - -/* - * Resource handling. - */ -static int serial8250_request_std_resource(struct uart_8250_port *up) -{ - unsigned int size = serial8250_port_size(up); - int ret = 0; - - switch (up->port.iotype) { - case UPIO_AU: - case UPIO_TSI: - case UPIO_MEM32: - case UPIO_MEM: - case UPIO_DWAPB: - case UPIO_DWAPB32: - if (!up->port.mapbase) - break; - - if (!request_mem_region(up->port.mapbase, size, "serial")) { - ret = -EBUSY; - break; - } - - if (up->port.flags & UPF_IOREMAP) { - up->port.membase = ioremap_nocache(up->port.mapbase, - size); - if (!up->port.membase) { - release_mem_region(up->port.mapbase, size); - ret = -ENOMEM; - } - } - break; - - case UPIO_HUB6: - case UPIO_PORT: - if (!request_region(up->port.iobase, size, "serial")) - ret = -EBUSY; - break; - } - return ret; -} - -static void serial8250_release_std_resource(struct uart_8250_port *up) -{ - unsigned int size = serial8250_port_size(up); - - switch (up->port.iotype) { - case UPIO_AU: - case UPIO_TSI: - case UPIO_MEM32: - case UPIO_MEM: - case UPIO_DWAPB: - case UPIO_DWAPB32: - if (!up->port.mapbase) - break; - - if (up->port.flags & UPF_IOREMAP) { - iounmap(up->port.membase); - up->port.membase = NULL; - } - - release_mem_region(up->port.mapbase, size); - break; - - case UPIO_HUB6: - case UPIO_PORT: - release_region(up->port.iobase, size); - break; - } -} - -static int serial8250_request_rsa_resource(struct uart_8250_port *up) -{ - unsigned long start = UART_RSA_BASE << up->port.regshift; - unsigned int size = 8 << up->port.regshift; - int ret = -EINVAL; - - switch (up->port.iotype) { - case UPIO_HUB6: - case UPIO_PORT: - start += up->port.iobase; - if (request_region(start, size, "serial-rsa")) - ret = 0; - else - ret = -EBUSY; - break; - } - - return ret; -} - -static void serial8250_release_rsa_resource(struct uart_8250_port *up) -{ - unsigned long offset = UART_RSA_BASE << up->port.regshift; - unsigned int size = 8 << up->port.regshift; - - switch (up->port.iotype) { - case UPIO_HUB6: - case UPIO_PORT: - release_region(up->port.iobase + offset, size); - break; - } -} - -static void serial8250_release_port(struct uart_port *port) -{ - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - - serial8250_release_std_resource(up); - if (up->port.type == PORT_RSA) - serial8250_release_rsa_resource(up); -} - -static int serial8250_request_port(struct uart_port *port) -{ - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - int ret = 0; - - ret = serial8250_request_std_resource(up); - if (ret == 0 && up->port.type == PORT_RSA) { - ret = serial8250_request_rsa_resource(up); - if (ret < 0) - serial8250_release_std_resource(up); - } - - return ret; -} - -static void serial8250_config_port(struct uart_port *port, int flags) -{ - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - int probeflags = PROBE_ANY; - int ret; - - /* - * Find the region that we can probe for. This in turn - * tells us whether we can probe for the type of port. - */ - ret = serial8250_request_std_resource(up); - if (ret < 0) - return; - - ret = serial8250_request_rsa_resource(up); - if (ret < 0) - probeflags &= ~PROBE_RSA; - - if (up->port.iotype != up->cur_iotype) - set_io_from_upio(port); - - if (flags & UART_CONFIG_TYPE) - autoconfig(up, probeflags); - - /* if access method is AU, it is a 16550 with a quirk */ - if (up->port.type == PORT_16550A && up->port.iotype == UPIO_AU) - up->bugs |= UART_BUG_NOMSR; - - if (up->port.type != PORT_UNKNOWN && flags & UART_CONFIG_IRQ) - autoconfig_irq(up); - - if (up->port.type != PORT_RSA && probeflags & PROBE_RSA) - serial8250_release_rsa_resource(up); - if (up->port.type == PORT_UNKNOWN) - serial8250_release_std_resource(up); -} - -static int -serial8250_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - if (ser->irq >= nr_irqs || ser->irq < 0 || - ser->baud_base < 9600 || ser->type < PORT_UNKNOWN || - ser->type >= ARRAY_SIZE(uart_config) || ser->type == PORT_CIRRUS || - ser->type == PORT_STARTECH) - return -EINVAL; - return 0; -} - -static const char * -serial8250_type(struct uart_port *port) -{ - int type = port->type; - - if (type >= ARRAY_SIZE(uart_config)) - type = 0; - return uart_config[type].name; -} - -static struct uart_ops serial8250_pops = { - .tx_empty = serial8250_tx_empty, - .set_mctrl = serial8250_set_mctrl, - .get_mctrl = serial8250_get_mctrl, - .stop_tx = serial8250_stop_tx, - .start_tx = serial8250_start_tx, - .stop_rx = serial8250_stop_rx, - .enable_ms = serial8250_enable_ms, - .break_ctl = serial8250_break_ctl, - .startup = serial8250_startup, - .shutdown = serial8250_shutdown, - .set_termios = serial8250_set_termios, - .set_ldisc = serial8250_set_ldisc, - .pm = serial8250_pm, - .type = serial8250_type, - .release_port = serial8250_release_port, - .request_port = serial8250_request_port, - .config_port = serial8250_config_port, - .verify_port = serial8250_verify_port, -#ifdef CONFIG_CONSOLE_POLL - .poll_get_char = serial8250_get_poll_char, - .poll_put_char = serial8250_put_poll_char, -#endif -}; - -static struct uart_8250_port serial8250_ports[UART_NR]; - -static void (*serial8250_isa_config)(int port, struct uart_port *up, - unsigned short *capabilities); - -void serial8250_set_isa_configurator( - void (*v)(int port, struct uart_port *up, unsigned short *capabilities)) -{ - serial8250_isa_config = v; -} -EXPORT_SYMBOL(serial8250_set_isa_configurator); - -static void __init serial8250_isa_init_ports(void) -{ - struct uart_8250_port *up; - static int first = 1; - int i, irqflag = 0; - - if (!first) - return; - first = 0; - - for (i = 0; i < nr_uarts; i++) { - struct uart_8250_port *up = &serial8250_ports[i]; - - up->port.line = i; - spin_lock_init(&up->port.lock); - - init_timer(&up->timer); - up->timer.function = serial8250_timeout; - - /* - * ALPHA_KLUDGE_MCR needs to be killed. - */ - up->mcr_mask = ~ALPHA_KLUDGE_MCR; - up->mcr_force = ALPHA_KLUDGE_MCR; - - up->port.ops = &serial8250_pops; - } - - if (share_irqs) - irqflag = IRQF_SHARED; - - for (i = 0, up = serial8250_ports; - i < ARRAY_SIZE(old_serial_port) && i < nr_uarts; - i++, up++) { - up->port.iobase = old_serial_port[i].port; - up->port.irq = irq_canonicalize(old_serial_port[i].irq); - up->port.irqflags = old_serial_port[i].irqflags; - up->port.uartclk = old_serial_port[i].baud_base * 16; - up->port.flags = old_serial_port[i].flags; - up->port.hub6 = old_serial_port[i].hub6; - up->port.membase = old_serial_port[i].iomem_base; - up->port.iotype = old_serial_port[i].io_type; - up->port.regshift = old_serial_port[i].iomem_reg_shift; - set_io_from_upio(&up->port); - up->port.irqflags |= irqflag; - if (serial8250_isa_config != NULL) - serial8250_isa_config(i, &up->port, &up->capabilities); - - } -} - -static void -serial8250_init_fixed_type_port(struct uart_8250_port *up, unsigned int type) -{ - up->port.type = type; - up->port.fifosize = uart_config[type].fifo_size; - up->capabilities = uart_config[type].flags; - up->tx_loadsz = uart_config[type].tx_loadsz; -} - -static void __init -serial8250_register_ports(struct uart_driver *drv, struct device *dev) -{ - int i; - - for (i = 0; i < nr_uarts; i++) { - struct uart_8250_port *up = &serial8250_ports[i]; - up->cur_iotype = 0xFF; - } - - serial8250_isa_init_ports(); - - for (i = 0; i < nr_uarts; i++) { - struct uart_8250_port *up = &serial8250_ports[i]; - - up->port.dev = dev; - - if (up->port.flags & UPF_FIXED_TYPE) - serial8250_init_fixed_type_port(up, up->port.type); - - uart_add_one_port(drv, &up->port); - } -} - -#ifdef CONFIG_SERIAL_8250_CONSOLE - -static void serial8250_console_putchar(struct uart_port *port, int ch) -{ - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - - wait_for_xmitr(up, UART_LSR_THRE); - serial_out(up, UART_TX, ch); -} - -/* - * Print a string to the serial port trying not to disturb - * any possible real use of the port... - * - * The console_lock must be held when we get here. - */ -static void -serial8250_console_write(struct console *co, const char *s, unsigned int count) -{ - struct uart_8250_port *up = &serial8250_ports[co->index]; - unsigned long flags; - unsigned int ier; - int locked = 1; - - touch_nmi_watchdog(); - - local_irq_save(flags); - if (up->port.sysrq) { - /* serial8250_handle_port() already took the lock */ - locked = 0; - } else if (oops_in_progress) { - locked = spin_trylock(&up->port.lock); - } else - spin_lock(&up->port.lock); - - /* - * First save the IER then disable the interrupts - */ - ier = serial_in(up, UART_IER); - - if (up->capabilities & UART_CAP_UUE) - serial_out(up, UART_IER, UART_IER_UUE); - else - serial_out(up, UART_IER, 0); - - uart_console_write(&up->port, s, count, serial8250_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore the IER - */ - wait_for_xmitr(up, BOTH_EMPTY); - serial_out(up, UART_IER, ier); - - /* - * The receive handling will happen properly because the - * receive ready bit will still be set; it is not cleared - * on read. However, modem control will not, we must - * call it if we have saved something in the saved flags - * while processing with interrupts off. - */ - if (up->msr_saved_flags) - check_modem_status(up); - - if (locked) - spin_unlock(&up->port.lock); - local_irq_restore(flags); -} - -static int __init serial8250_console_setup(struct console *co, char *options) -{ - struct uart_port *port; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - if (co->index >= nr_uarts) - co->index = 0; - port = &serial8250_ports[co->index].port; - if (!port->iobase && !port->membase) - return -ENODEV; - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - -static int serial8250_console_early_setup(void) -{ - return serial8250_find_port_for_earlycon(); -} - -static struct console serial8250_console = { - .name = "ttyS", - .write = serial8250_console_write, - .device = uart_console_device, - .setup = serial8250_console_setup, - .early_setup = serial8250_console_early_setup, - .flags = CON_PRINTBUFFER | CON_ANYTIME, - .index = -1, - .data = &serial8250_reg, -}; - -static int __init serial8250_console_init(void) -{ - if (nr_uarts > UART_NR) - nr_uarts = UART_NR; - - serial8250_isa_init_ports(); - register_console(&serial8250_console); - return 0; -} -console_initcall(serial8250_console_init); - -int serial8250_find_port(struct uart_port *p) -{ - int line; - struct uart_port *port; - - for (line = 0; line < nr_uarts; line++) { - port = &serial8250_ports[line].port; - if (uart_match_port(p, port)) - return line; - } - return -ENODEV; -} - -#define SERIAL8250_CONSOLE &serial8250_console -#else -#define SERIAL8250_CONSOLE NULL -#endif - -static struct uart_driver serial8250_reg = { - .owner = THIS_MODULE, - .driver_name = "serial", - .dev_name = "ttyS", - .major = TTY_MAJOR, - .minor = 64, - .cons = SERIAL8250_CONSOLE, -}; - -/* - * early_serial_setup - early registration for 8250 ports - * - * Setup an 8250 port structure prior to console initialisation. Use - * after console initialisation will cause undefined behaviour. - */ -int __init early_serial_setup(struct uart_port *port) -{ - struct uart_port *p; - - if (port->line >= ARRAY_SIZE(serial8250_ports)) - return -ENODEV; - - serial8250_isa_init_ports(); - p = &serial8250_ports[port->line].port; - p->iobase = port->iobase; - p->membase = port->membase; - p->irq = port->irq; - p->irqflags = port->irqflags; - p->uartclk = port->uartclk; - p->fifosize = port->fifosize; - p->regshift = port->regshift; - p->iotype = port->iotype; - p->flags = port->flags; - p->mapbase = port->mapbase; - p->private_data = port->private_data; - p->type = port->type; - p->line = port->line; - - set_io_from_upio(p); - if (port->serial_in) - p->serial_in = port->serial_in; - if (port->serial_out) - p->serial_out = port->serial_out; - - return 0; -} - -/** - * serial8250_suspend_port - suspend one serial port - * @line: serial line number - * - * Suspend one serial port. - */ -void serial8250_suspend_port(int line) -{ - uart_suspend_port(&serial8250_reg, &serial8250_ports[line].port); -} - -/** - * serial8250_resume_port - resume one serial port - * @line: serial line number - * - * Resume one serial port. - */ -void serial8250_resume_port(int line) -{ - struct uart_8250_port *up = &serial8250_ports[line]; - - if (up->capabilities & UART_NATSEMI) { - unsigned char tmp; - - /* Ensure it's still in high speed mode */ - serial_outp(up, UART_LCR, 0xE0); - - tmp = serial_in(up, 0x04); /* EXCR2 */ - tmp &= ~0xB0; /* Disable LOCK, mask out PRESL[01] */ - tmp |= 0x10; /* 1.625 divisor for baud_base --> 921600 */ - serial_outp(up, 0x04, tmp); - - serial_outp(up, UART_LCR, 0); - } - uart_resume_port(&serial8250_reg, &up->port); -} - -/* - * Register a set of serial devices attached to a platform device. The - * list is terminated with a zero flags entry, which means we expect - * all entries to have at least UPF_BOOT_AUTOCONF set. - */ -static int __devinit serial8250_probe(struct platform_device *dev) -{ - struct plat_serial8250_port *p = dev->dev.platform_data; - struct uart_port port; - int ret, i, irqflag = 0; - - memset(&port, 0, sizeof(struct uart_port)); - - if (share_irqs) - irqflag = IRQF_SHARED; - - for (i = 0; p && p->flags != 0; p++, i++) { - port.iobase = p->iobase; - port.membase = p->membase; - port.irq = p->irq; - port.irqflags = p->irqflags; - port.uartclk = p->uartclk; - port.regshift = p->regshift; - port.iotype = p->iotype; - port.flags = p->flags; - port.mapbase = p->mapbase; - port.hub6 = p->hub6; - port.private_data = p->private_data; - port.type = p->type; - port.serial_in = p->serial_in; - port.serial_out = p->serial_out; - port.set_termios = p->set_termios; - port.pm = p->pm; - port.dev = &dev->dev; - port.irqflags |= irqflag; - ret = serial8250_register_port(&port); - if (ret < 0) { - dev_err(&dev->dev, "unable to register port at index %d " - "(IO%lx MEM%llx IRQ%d): %d\n", i, - p->iobase, (unsigned long long)p->mapbase, - p->irq, ret); - } - } - return 0; -} - -/* - * Remove serial ports registered against a platform device. - */ -static int __devexit serial8250_remove(struct platform_device *dev) -{ - int i; - - for (i = 0; i < nr_uarts; i++) { - struct uart_8250_port *up = &serial8250_ports[i]; - - if (up->port.dev == &dev->dev) - serial8250_unregister_port(i); - } - return 0; -} - -static int serial8250_suspend(struct platform_device *dev, pm_message_t state) -{ - int i; - - for (i = 0; i < UART_NR; i++) { - struct uart_8250_port *up = &serial8250_ports[i]; - - if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev) - uart_suspend_port(&serial8250_reg, &up->port); - } - - return 0; -} - -static int serial8250_resume(struct platform_device *dev) -{ - int i; - - for (i = 0; i < UART_NR; i++) { - struct uart_8250_port *up = &serial8250_ports[i]; - - if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev) - serial8250_resume_port(i); - } - - return 0; -} - -static struct platform_driver serial8250_isa_driver = { - .probe = serial8250_probe, - .remove = __devexit_p(serial8250_remove), - .suspend = serial8250_suspend, - .resume = serial8250_resume, - .driver = { - .name = "serial8250", - .owner = THIS_MODULE, - }, -}; - -/* - * This "device" covers _all_ ISA 8250-compatible serial devices listed - * in the table in include/asm/serial.h - */ -static struct platform_device *serial8250_isa_devs; - -/* - * serial8250_register_port and serial8250_unregister_port allows for - * 16x50 serial ports to be configured at run-time, to support PCMCIA - * modems and PCI multiport cards. - */ -static DEFINE_MUTEX(serial_mutex); - -static struct uart_8250_port *serial8250_find_match_or_unused(struct uart_port *port) -{ - int i; - - /* - * First, find a port entry which matches. - */ - for (i = 0; i < nr_uarts; i++) - if (uart_match_port(&serial8250_ports[i].port, port)) - return &serial8250_ports[i]; - - /* - * We didn't find a matching entry, so look for the first - * free entry. We look for one which hasn't been previously - * used (indicated by zero iobase). - */ - for (i = 0; i < nr_uarts; i++) - if (serial8250_ports[i].port.type == PORT_UNKNOWN && - serial8250_ports[i].port.iobase == 0) - return &serial8250_ports[i]; - - /* - * That also failed. Last resort is to find any entry which - * doesn't have a real port associated with it. - */ - for (i = 0; i < nr_uarts; i++) - if (serial8250_ports[i].port.type == PORT_UNKNOWN) - return &serial8250_ports[i]; - - return NULL; -} - -/** - * serial8250_register_port - register a serial port - * @port: serial port template - * - * Configure the serial port specified by the request. If the - * port exists and is in use, it is hung up and unregistered - * first. - * - * The port is then probed and if necessary the IRQ is autodetected - * If this fails an error is returned. - * - * On success the port is ready to use and the line number is returned. - */ -int serial8250_register_port(struct uart_port *port) -{ - struct uart_8250_port *uart; - int ret = -ENOSPC; - - if (port->uartclk == 0) - return -EINVAL; - - mutex_lock(&serial_mutex); - - uart = serial8250_find_match_or_unused(port); - if (uart) { - uart_remove_one_port(&serial8250_reg, &uart->port); - - uart->port.iobase = port->iobase; - uart->port.membase = port->membase; - uart->port.irq = port->irq; - uart->port.irqflags = port->irqflags; - uart->port.uartclk = port->uartclk; - uart->port.fifosize = port->fifosize; - uart->port.regshift = port->regshift; - uart->port.iotype = port->iotype; - uart->port.flags = port->flags | UPF_BOOT_AUTOCONF; - uart->port.mapbase = port->mapbase; - uart->port.private_data = port->private_data; - if (port->dev) - uart->port.dev = port->dev; - - if (port->flags & UPF_FIXED_TYPE) - serial8250_init_fixed_type_port(uart, port->type); - - set_io_from_upio(&uart->port); - /* Possibly override default I/O functions. */ - if (port->serial_in) - uart->port.serial_in = port->serial_in; - if (port->serial_out) - uart->port.serial_out = port->serial_out; - /* Possibly override set_termios call */ - if (port->set_termios) - uart->port.set_termios = port->set_termios; - if (port->pm) - uart->port.pm = port->pm; - - if (serial8250_isa_config != NULL) - serial8250_isa_config(0, &uart->port, - &uart->capabilities); - - ret = uart_add_one_port(&serial8250_reg, &uart->port); - if (ret == 0) - ret = uart->port.line; - } - mutex_unlock(&serial_mutex); - - return ret; -} -EXPORT_SYMBOL(serial8250_register_port); - -/** - * serial8250_unregister_port - remove a 16x50 serial port at runtime - * @line: serial line number - * - * Remove one serial port. This may not be called from interrupt - * context. We hand the port back to the our control. - */ -void serial8250_unregister_port(int line) -{ - struct uart_8250_port *uart = &serial8250_ports[line]; - - mutex_lock(&serial_mutex); - uart_remove_one_port(&serial8250_reg, &uart->port); - if (serial8250_isa_devs) { - uart->port.flags &= ~UPF_BOOT_AUTOCONF; - uart->port.type = PORT_UNKNOWN; - uart->port.dev = &serial8250_isa_devs->dev; - uart_add_one_port(&serial8250_reg, &uart->port); - } else { - uart->port.dev = NULL; - } - mutex_unlock(&serial_mutex); -} -EXPORT_SYMBOL(serial8250_unregister_port); - -static int __init serial8250_init(void) -{ - int ret; - - if (nr_uarts > UART_NR) - nr_uarts = UART_NR; - - printk(KERN_INFO "Serial: 8250/16550 driver, " - "%d ports, IRQ sharing %sabled\n", nr_uarts, - share_irqs ? "en" : "dis"); - -#ifdef CONFIG_SPARC - ret = sunserial_register_minors(&serial8250_reg, UART_NR); -#else - serial8250_reg.nr = UART_NR; - ret = uart_register_driver(&serial8250_reg); -#endif - if (ret) - goto out; - - serial8250_isa_devs = platform_device_alloc("serial8250", - PLAT8250_DEV_LEGACY); - if (!serial8250_isa_devs) { - ret = -ENOMEM; - goto unreg_uart_drv; - } - - ret = platform_device_add(serial8250_isa_devs); - if (ret) - goto put_dev; - - serial8250_register_ports(&serial8250_reg, &serial8250_isa_devs->dev); - - ret = platform_driver_register(&serial8250_isa_driver); - if (ret == 0) - goto out; - - platform_device_del(serial8250_isa_devs); -put_dev: - platform_device_put(serial8250_isa_devs); -unreg_uart_drv: -#ifdef CONFIG_SPARC - sunserial_unregister_minors(&serial8250_reg, UART_NR); -#else - uart_unregister_driver(&serial8250_reg); -#endif -out: - return ret; -} - -static void __exit serial8250_exit(void) -{ - struct platform_device *isa_dev = serial8250_isa_devs; - - /* - * This tells serial8250_unregister_port() not to re-register - * the ports (thereby making serial8250_isa_driver permanently - * in use.) - */ - serial8250_isa_devs = NULL; - - platform_driver_unregister(&serial8250_isa_driver); - platform_device_unregister(isa_dev); - -#ifdef CONFIG_SPARC - sunserial_unregister_minors(&serial8250_reg, UART_NR); -#else - uart_unregister_driver(&serial8250_reg); -#endif -} - -module_init(serial8250_init); -module_exit(serial8250_exit); - -EXPORT_SYMBOL(serial8250_suspend_port); -EXPORT_SYMBOL(serial8250_resume_port); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Generic 8250/16x50 serial driver"); - -module_param(share_irqs, uint, 0644); -MODULE_PARM_DESC(share_irqs, "Share IRQs with other non-8250/16x50 devices" - " (unsafe)"); - -module_param(nr_uarts, uint, 0644); -MODULE_PARM_DESC(nr_uarts, "Maximum number of UARTs supported. (1-" __MODULE_STRING(CONFIG_SERIAL_8250_NR_UARTS) ")"); - -module_param(skip_txen_test, uint, 0644); -MODULE_PARM_DESC(skip_txen_test, "Skip checking for the TXEN bug at init time"); - -#ifdef CONFIG_SERIAL_8250_RSA -module_param_array(probe_rsa, ulong, &probe_rsa_count, 0444); -MODULE_PARM_DESC(probe_rsa, "Probe I/O ports for RSA"); -#endif -MODULE_ALIAS_CHARDEV_MAJOR(TTY_MAJOR); diff --git a/drivers/serial/8250.h b/drivers/serial/8250.h deleted file mode 100644 index 6e19ea3e48d5..000000000000 --- a/drivers/serial/8250.h +++ /dev/null @@ -1,80 +0,0 @@ -/* - * linux/drivers/char/8250.h - * - * Driver for 8250/16550-type serial ports - * - * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. - * - * Copyright (C) 2001 Russell King. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#include <linux/serial_8250.h> - -struct old_serial_port { - unsigned int uart; - unsigned int baud_base; - unsigned int port; - unsigned int irq; - unsigned int flags; - unsigned char hub6; - unsigned char io_type; - unsigned char *iomem_base; - unsigned short iomem_reg_shift; - unsigned long irqflags; -}; - -/* - * This replaces serial_uart_config in include/linux/serial.h - */ -struct serial8250_config { - const char *name; - unsigned short fifo_size; - unsigned short tx_loadsz; - unsigned char fcr; - unsigned int flags; -}; - -#define UART_CAP_FIFO (1 << 8) /* UART has FIFO */ -#define UART_CAP_EFR (1 << 9) /* UART has EFR */ -#define UART_CAP_SLEEP (1 << 10) /* UART has IER sleep */ -#define UART_CAP_AFE (1 << 11) /* MCR-based hw flow control */ -#define UART_CAP_UUE (1 << 12) /* UART needs IER bit 6 set (Xscale) */ - -#define UART_BUG_QUOT (1 << 0) /* UART has buggy quot LSB */ -#define UART_BUG_TXEN (1 << 1) /* UART has buggy TX IIR status */ -#define UART_BUG_NOMSR (1 << 2) /* UART has buggy MSR status bits (Au1x00) */ -#define UART_BUG_THRE (1 << 3) /* UART has buggy THRE reassertion */ - -#define PROBE_RSA (1 << 0) -#define PROBE_ANY (~0) - -#define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8) - -#ifdef CONFIG_SERIAL_8250_SHARE_IRQ -#define SERIAL8250_SHARE_IRQS 1 -#else -#define SERIAL8250_SHARE_IRQS 0 -#endif - -#if defined(__alpha__) && !defined(CONFIG_PCI) -/* - * Digital did something really horribly wrong with the OUT1 and OUT2 - * lines on at least some ALPHA's. The failure mode is that if either - * is cleared, the machine locks up with endless interrupts. - */ -#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2 | UART_MCR_OUT1) -#elif defined(CONFIG_SBC8560) -/* - * WindRiver did something similarly broken on their SBC8560 board. The - * UART tristates its IRQ output while OUT2 is clear, but they pulled - * the interrupt line _up_ instead of down, so if we register the IRQ - * while the UART is in that state, we die in an IRQ storm. */ -#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2) -#else -#define ALPHA_KLUDGE_MCR 0 -#endif diff --git a/drivers/serial/8250_accent.c b/drivers/serial/8250_accent.c deleted file mode 100644 index 9c10262f2469..000000000000 --- a/drivers/serial/8250_accent.c +++ /dev/null @@ -1,47 +0,0 @@ -/* - * linux/drivers/serial/8250_accent.c - * - * Copyright (C) 2005 Russell King. - * Data taken from include/asm-i386/serial.h - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/module.h> -#include <linux/init.h> -#include <linux/serial_8250.h> - -#define PORT(_base,_irq) \ - { \ - .iobase = _base, \ - .irq = _irq, \ - .uartclk = 1843200, \ - .iotype = UPIO_PORT, \ - .flags = UPF_BOOT_AUTOCONF, \ - } - -static struct plat_serial8250_port accent_data[] = { - PORT(0x330, 4), - PORT(0x338, 4), - { }, -}; - -static struct platform_device accent_device = { - .name = "serial8250", - .id = PLAT8250_DEV_ACCENT, - .dev = { - .platform_data = accent_data, - }, -}; - -static int __init accent_init(void) -{ - return platform_device_register(&accent_device); -} - -module_init(accent_init); - -MODULE_AUTHOR("Russell King"); -MODULE_DESCRIPTION("8250 serial probe module for Accent Async cards"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/8250_acorn.c b/drivers/serial/8250_acorn.c deleted file mode 100644 index b0ce8c56f1a4..000000000000 --- a/drivers/serial/8250_acorn.c +++ /dev/null @@ -1,141 +0,0 @@ -/* - * linux/drivers/serial/acorn.c - * - * Copyright (C) 1996-2003 Russell King. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/module.h> -#include <linux/types.h> -#include <linux/tty.h> -#include <linux/serial_core.h> -#include <linux/errno.h> -#include <linux/ioport.h> -#include <linux/slab.h> -#include <linux/device.h> -#include <linux/init.h> - -#include <asm/io.h> -#include <asm/ecard.h> -#include <asm/string.h> - -#include "8250.h" - -#define MAX_PORTS 3 - -struct serial_card_type { - unsigned int num_ports; - unsigned int uartclk; - unsigned int type; - unsigned int offset[MAX_PORTS]; -}; - -struct serial_card_info { - unsigned int num_ports; - int ports[MAX_PORTS]; - void __iomem *vaddr; -}; - -static int __devinit -serial_card_probe(struct expansion_card *ec, const struct ecard_id *id) -{ - struct serial_card_info *info; - struct serial_card_type *type = id->data; - struct uart_port port; - unsigned long bus_addr; - unsigned int i; - - info = kzalloc(sizeof(struct serial_card_info), GFP_KERNEL); - if (!info) - return -ENOMEM; - - info->num_ports = type->num_ports; - - bus_addr = ecard_resource_start(ec, type->type); - info->vaddr = ecardm_iomap(ec, type->type, 0, 0); - if (!info->vaddr) { - kfree(info); - return -ENOMEM; - } - - ecard_set_drvdata(ec, info); - - memset(&port, 0, sizeof(struct uart_port)); - port.irq = ec->irq; - port.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ; - port.uartclk = type->uartclk; - port.iotype = UPIO_MEM; - port.regshift = 2; - port.dev = &ec->dev; - - for (i = 0; i < info->num_ports; i ++) { - port.membase = info->vaddr + type->offset[i]; - port.mapbase = bus_addr + type->offset[i]; - - info->ports[i] = serial8250_register_port(&port); - } - - return 0; -} - -static void __devexit serial_card_remove(struct expansion_card *ec) -{ - struct serial_card_info *info = ecard_get_drvdata(ec); - int i; - - ecard_set_drvdata(ec, NULL); - - for (i = 0; i < info->num_ports; i++) - if (info->ports[i] > 0) - serial8250_unregister_port(info->ports[i]); - - kfree(info); -} - -static struct serial_card_type atomwide_type = { - .num_ports = 3, - .uartclk = 7372800, - .type = ECARD_RES_IOCSLOW, - .offset = { 0x2800, 0x2400, 0x2000 }, -}; - -static struct serial_card_type serport_type = { - .num_ports = 2, - .uartclk = 3686400, - .type = ECARD_RES_IOCSLOW, - .offset = { 0x2000, 0x2020 }, -}; - -static const struct ecard_id serial_cids[] = { - { MANU_ATOMWIDE, PROD_ATOMWIDE_3PSERIAL, &atomwide_type }, - { MANU_SERPORT, PROD_SERPORT_DSPORT, &serport_type }, - { 0xffff, 0xffff } -}; - -static struct ecard_driver serial_card_driver = { - .probe = serial_card_probe, - .remove = __devexit_p(serial_card_remove), - .id_table = serial_cids, - .drv = { - .name = "8250_acorn", - }, -}; - -static int __init serial_card_init(void) -{ - return ecard_register_driver(&serial_card_driver); -} - -static void __exit serial_card_exit(void) -{ - ecard_remove_driver(&serial_card_driver); -} - -MODULE_AUTHOR("Russell King"); -MODULE_DESCRIPTION("Acorn 8250-compatible serial port expansion card driver"); -MODULE_LICENSE("GPL"); - -module_init(serial_card_init); -module_exit(serial_card_exit); diff --git a/drivers/serial/8250_boca.c b/drivers/serial/8250_boca.c deleted file mode 100644 index 3bfe0f7b26fb..000000000000 --- a/drivers/serial/8250_boca.c +++ /dev/null @@ -1,61 +0,0 @@ -/* - * linux/drivers/serial/8250_boca.c - * - * Copyright (C) 2005 Russell King. - * Data taken from include/asm-i386/serial.h - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/module.h> -#include <linux/init.h> -#include <linux/serial_8250.h> - -#define PORT(_base,_irq) \ - { \ - .iobase = _base, \ - .irq = _irq, \ - .uartclk = 1843200, \ - .iotype = UPIO_PORT, \ - .flags = UPF_BOOT_AUTOCONF, \ - } - -static struct plat_serial8250_port boca_data[] = { - PORT(0x100, 12), - PORT(0x108, 12), - PORT(0x110, 12), - PORT(0x118, 12), - PORT(0x120, 12), - PORT(0x128, 12), - PORT(0x130, 12), - PORT(0x138, 12), - PORT(0x140, 12), - PORT(0x148, 12), - PORT(0x150, 12), - PORT(0x158, 12), - PORT(0x160, 12), - PORT(0x168, 12), - PORT(0x170, 12), - PORT(0x178, 12), - { }, -}; - -static struct platform_device boca_device = { - .name = "serial8250", - .id = PLAT8250_DEV_BOCA, - .dev = { - .platform_data = boca_data, - }, -}; - -static int __init boca_init(void) -{ - return platform_device_register(&boca_device); -} - -module_init(boca_init); - -MODULE_AUTHOR("Russell King"); -MODULE_DESCRIPTION("8250 serial probe module for Boca cards"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/8250_early.c b/drivers/serial/8250_early.c deleted file mode 100644 index eaafb98debed..000000000000 --- a/drivers/serial/8250_early.c +++ /dev/null @@ -1,287 +0,0 @@ -/* - * Early serial console for 8250/16550 devices - * - * (c) Copyright 2004 Hewlett-Packard Development Company, L.P. - * Bjorn Helgaas <bjorn.helgaas@hp.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * Based on the 8250.c serial driver, Copyright (C) 2001 Russell King, - * and on early_printk.c by Andi Kleen. - * - * This is for use before the serial driver has initialized, in - * particular, before the UARTs have been discovered and named. - * Instead of specifying the console device as, e.g., "ttyS0", - * we locate the device directly by its MMIO or I/O port address. - * - * The user can specify the device directly, e.g., - * earlycon=uart8250,io,0x3f8,9600n8 - * earlycon=uart8250,mmio,0xff5e0000,115200n8 - * earlycon=uart8250,mmio32,0xff5e0000,115200n8 - * or - * console=uart8250,io,0x3f8,9600n8 - * console=uart8250,mmio,0xff5e0000,115200n8 - * console=uart8250,mmio32,0xff5e0000,115200n8 - */ - -#include <linux/tty.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/serial_core.h> -#include <linux/serial_reg.h> -#include <linux/serial.h> -#include <linux/serial_8250.h> -#include <asm/io.h> -#include <asm/serial.h> -#ifdef CONFIG_FIX_EARLYCON_MEM -#include <asm/pgtable.h> -#include <asm/fixmap.h> -#endif - -struct early_serial8250_device { - struct uart_port port; - char options[16]; /* e.g., 115200n8 */ - unsigned int baud; -}; - -static struct early_serial8250_device early_device; - -static unsigned int __init serial_in(struct uart_port *port, int offset) -{ - switch (port->iotype) { - case UPIO_MEM: - return readb(port->membase + offset); - case UPIO_MEM32: - return readl(port->membase + (offset << 2)); - case UPIO_PORT: - return inb(port->iobase + offset); - default: - return 0; - } -} - -static void __init serial_out(struct uart_port *port, int offset, int value) -{ - switch (port->iotype) { - case UPIO_MEM: - writeb(value, port->membase + offset); - break; - case UPIO_MEM32: - writel(value, port->membase + (offset << 2)); - break; - case UPIO_PORT: - outb(value, port->iobase + offset); - break; - } -} - -#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - -static void __init wait_for_xmitr(struct uart_port *port) -{ - unsigned int status; - - for (;;) { - status = serial_in(port, UART_LSR); - if ((status & BOTH_EMPTY) == BOTH_EMPTY) - return; - cpu_relax(); - } -} - -static void __init serial_putc(struct uart_port *port, int c) -{ - wait_for_xmitr(port); - serial_out(port, UART_TX, c); -} - -static void __init early_serial8250_write(struct console *console, - const char *s, unsigned int count) -{ - struct uart_port *port = &early_device.port; - unsigned int ier; - - /* Save the IER and disable interrupts */ - ier = serial_in(port, UART_IER); - serial_out(port, UART_IER, 0); - - uart_console_write(port, s, count, serial_putc); - - /* Wait for transmitter to become empty and restore the IER */ - wait_for_xmitr(port); - serial_out(port, UART_IER, ier); -} - -static unsigned int __init probe_baud(struct uart_port *port) -{ - unsigned char lcr, dll, dlm; - unsigned int quot; - - lcr = serial_in(port, UART_LCR); - serial_out(port, UART_LCR, lcr | UART_LCR_DLAB); - dll = serial_in(port, UART_DLL); - dlm = serial_in(port, UART_DLM); - serial_out(port, UART_LCR, lcr); - - quot = (dlm << 8) | dll; - return (port->uartclk / 16) / quot; -} - -static void __init init_port(struct early_serial8250_device *device) -{ - struct uart_port *port = &device->port; - unsigned int divisor; - unsigned char c; - - serial_out(port, UART_LCR, 0x3); /* 8n1 */ - serial_out(port, UART_IER, 0); /* no interrupt */ - serial_out(port, UART_FCR, 0); /* no fifo */ - serial_out(port, UART_MCR, 0x3); /* DTR + RTS */ - - divisor = port->uartclk / (16 * device->baud); - c = serial_in(port, UART_LCR); - serial_out(port, UART_LCR, c | UART_LCR_DLAB); - serial_out(port, UART_DLL, divisor & 0xff); - serial_out(port, UART_DLM, (divisor >> 8) & 0xff); - serial_out(port, UART_LCR, c & ~UART_LCR_DLAB); -} - -static int __init parse_options(struct early_serial8250_device *device, - char *options) -{ - struct uart_port *port = &device->port; - int mmio, mmio32, length; - - if (!options) - return -ENODEV; - - port->uartclk = BASE_BAUD * 16; - - mmio = !strncmp(options, "mmio,", 5); - mmio32 = !strncmp(options, "mmio32,", 7); - if (mmio || mmio32) { - port->iotype = (mmio ? UPIO_MEM : UPIO_MEM32); - port->mapbase = simple_strtoul(options + (mmio ? 5 : 7), - &options, 0); - if (mmio32) - port->regshift = 2; -#ifdef CONFIG_FIX_EARLYCON_MEM - set_fixmap_nocache(FIX_EARLYCON_MEM_BASE, - port->mapbase & PAGE_MASK); - port->membase = - (void __iomem *)__fix_to_virt(FIX_EARLYCON_MEM_BASE); - port->membase += port->mapbase & ~PAGE_MASK; -#else - port->membase = ioremap_nocache(port->mapbase, 64); - if (!port->membase) { - printk(KERN_ERR "%s: Couldn't ioremap 0x%llx\n", - __func__, - (unsigned long long) port->mapbase); - return -ENOMEM; - } -#endif - } else if (!strncmp(options, "io,", 3)) { - port->iotype = UPIO_PORT; - port->iobase = simple_strtoul(options + 3, &options, 0); - mmio = 0; - } else - return -EINVAL; - - options = strchr(options, ','); - if (options) { - options++; - device->baud = simple_strtoul(options, NULL, 0); - length = min(strcspn(options, " "), sizeof(device->options)); - strncpy(device->options, options, length); - } else { - device->baud = probe_baud(port); - snprintf(device->options, sizeof(device->options), "%u", - device->baud); - } - - if (mmio || mmio32) - printk(KERN_INFO - "Early serial console at MMIO%s 0x%llx (options '%s')\n", - mmio32 ? "32" : "", - (unsigned long long)port->mapbase, - device->options); - else - printk(KERN_INFO - "Early serial console at I/O port 0x%lx (options '%s')\n", - port->iobase, - device->options); - - return 0; -} - -static struct console early_serial8250_console __initdata = { - .name = "uart", - .write = early_serial8250_write, - .flags = CON_PRINTBUFFER | CON_BOOT, - .index = -1, -}; - -static int __init early_serial8250_setup(char *options) -{ - struct early_serial8250_device *device = &early_device; - int err; - - if (device->port.membase || device->port.iobase) - return 0; - - err = parse_options(device, options); - if (err < 0) - return err; - - init_port(device); - return 0; -} - -int __init setup_early_serial8250_console(char *cmdline) -{ - char *options; - int err; - - options = strstr(cmdline, "uart8250,"); - if (!options) { - options = strstr(cmdline, "uart,"); - if (!options) - return 0; - } - - options = strchr(cmdline, ',') + 1; - err = early_serial8250_setup(options); - if (err < 0) - return err; - - register_console(&early_serial8250_console); - - return 0; -} - -int serial8250_find_port_for_earlycon(void) -{ - struct early_serial8250_device *device = &early_device; - struct uart_port *port = &device->port; - int line; - int ret; - - if (!device->port.membase && !device->port.iobase) - return -ENODEV; - - line = serial8250_find_port(port); - if (line < 0) - return -ENODEV; - - ret = update_console_cmdline("uart", 8250, - "ttyS", line, device->options); - if (ret < 0) - ret = update_console_cmdline("uart", 0, - "ttyS", line, device->options); - - return ret; -} - -early_param("earlycon", setup_early_serial8250_console); diff --git a/drivers/serial/8250_exar_st16c554.c b/drivers/serial/8250_exar_st16c554.c deleted file mode 100644 index 567143ace159..000000000000 --- a/drivers/serial/8250_exar_st16c554.c +++ /dev/null @@ -1,52 +0,0 @@ -/* - * linux/drivers/serial/8250_exar.c - * - * Written by Paul B Schroeder < pschroeder "at" uplogix "dot" com > - * Based on 8250_boca. - * - * Copyright (C) 2005 Russell King. - * Data taken from include/asm-i386/serial.h - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/module.h> -#include <linux/init.h> -#include <linux/serial_8250.h> - -#define PORT(_base,_irq) \ - { \ - .iobase = _base, \ - .irq = _irq, \ - .uartclk = 1843200, \ - .iotype = UPIO_PORT, \ - .flags = UPF_BOOT_AUTOCONF, \ - } - -static struct plat_serial8250_port exar_data[] = { - PORT(0x100, 5), - PORT(0x108, 5), - PORT(0x110, 5), - PORT(0x118, 5), - { }, -}; - -static struct platform_device exar_device = { - .name = "serial8250", - .id = PLAT8250_DEV_EXAR_ST16C554, - .dev = { - .platform_data = exar_data, - }, -}; - -static int __init exar_init(void) -{ - return platform_device_register(&exar_device); -} - -module_init(exar_init); - -MODULE_AUTHOR("Paul B Schroeder"); -MODULE_DESCRIPTION("8250 serial probe module for Exar cards"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/8250_fourport.c b/drivers/serial/8250_fourport.c deleted file mode 100644 index 6375d68b7913..000000000000 --- a/drivers/serial/8250_fourport.c +++ /dev/null @@ -1,53 +0,0 @@ -/* - * linux/drivers/serial/8250_fourport.c - * - * Copyright (C) 2005 Russell King. - * Data taken from include/asm-i386/serial.h - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/module.h> -#include <linux/init.h> -#include <linux/serial_8250.h> - -#define PORT(_base,_irq) \ - { \ - .iobase = _base, \ - .irq = _irq, \ - .uartclk = 1843200, \ - .iotype = UPIO_PORT, \ - .flags = UPF_BOOT_AUTOCONF | UPF_FOURPORT, \ - } - -static struct plat_serial8250_port fourport_data[] = { - PORT(0x1a0, 9), - PORT(0x1a8, 9), - PORT(0x1b0, 9), - PORT(0x1b8, 9), - PORT(0x2a0, 5), - PORT(0x2a8, 5), - PORT(0x2b0, 5), - PORT(0x2b8, 5), - { }, -}; - -static struct platform_device fourport_device = { - .name = "serial8250", - .id = PLAT8250_DEV_FOURPORT, - .dev = { - .platform_data = fourport_data, - }, -}; - -static int __init fourport_init(void) -{ - return platform_device_register(&fourport_device); -} - -module_init(fourport_init); - -MODULE_AUTHOR("Russell King"); -MODULE_DESCRIPTION("8250 serial probe module for AST Fourport cards"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/8250_gsc.c b/drivers/serial/8250_gsc.c deleted file mode 100644 index d8c0ffbfa6e3..000000000000 --- a/drivers/serial/8250_gsc.c +++ /dev/null @@ -1,122 +0,0 @@ -/* - * Serial Device Initialisation for Lasi/Asp/Wax/Dino - * - * (c) Copyright Matthew Wilcox <willy@debian.org> 2001-2002 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/module.h> -#include <linux/serial_core.h> -#include <linux/signal.h> -#include <linux/types.h> - -#include <asm/hardware.h> -#include <asm/parisc-device.h> -#include <asm/io.h> - -#include "8250.h" - -static int __init serial_init_chip(struct parisc_device *dev) -{ - struct uart_port port; - unsigned long address; - int err; - - if (!dev->irq) { - /* We find some unattached serial ports by walking native - * busses. These should be silently ignored. Otherwise, - * what we have here is a missing parent device, so tell - * the user what they're missing. - */ - if (parisc_parent(dev)->id.hw_type != HPHW_IOA) - printk(KERN_INFO - "Serial: device 0x%llx not configured.\n" - "Enable support for Wax, Lasi, Asp or Dino.\n", - (unsigned long long)dev->hpa.start); - return -ENODEV; - } - - address = dev->hpa.start; - if (dev->id.sversion != 0x8d) - address += 0x800; - - memset(&port, 0, sizeof(port)); - port.iotype = UPIO_MEM; - /* 7.272727MHz on Lasi. Assumed the same for Dino, Wax and Timi. */ - port.uartclk = 7272727; - port.mapbase = address; - port.membase = ioremap_nocache(address, 16); - port.irq = dev->irq; - port.flags = UPF_BOOT_AUTOCONF; - port.dev = &dev->dev; - - err = serial8250_register_port(&port); - if (err < 0) { - printk(KERN_WARNING - "serial8250_register_port returned error %d\n", err); - iounmap(port.membase); - return err; - } - - return 0; -} - -static struct parisc_device_id serial_tbl[] = { - { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00075 }, - { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008c }, - { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008d }, - { 0 } -}; - -/* Hack. Some machines have SERIAL_0 attached to Lasi and SERIAL_1 - * attached to Dino. Unfortunately, Dino appears before Lasi in the device - * tree. To ensure that ttyS0 == SERIAL_0, we register two drivers; one - * which only knows about Lasi and then a second which will find all the - * other serial ports. HPUX ignores this problem. - */ -static struct parisc_device_id lasi_tbl[] = { - { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03B, 0x0008C }, /* C1xx/C1xxL */ - { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03C, 0x0008C }, /* B132L */ - { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03D, 0x0008C }, /* B160L */ - { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03E, 0x0008C }, /* B132L+ */ - { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03F, 0x0008C }, /* B180L+ */ - { HPHW_FIO, HVERSION_REV_ANY_ID, 0x046, 0x0008C }, /* Rocky2 120 */ - { HPHW_FIO, HVERSION_REV_ANY_ID, 0x047, 0x0008C }, /* Rocky2 150 */ - { HPHW_FIO, HVERSION_REV_ANY_ID, 0x04E, 0x0008C }, /* Kiji L2 132 */ - { HPHW_FIO, HVERSION_REV_ANY_ID, 0x056, 0x0008C }, /* Raven+ */ - { 0 } -}; - - -MODULE_DEVICE_TABLE(parisc, serial_tbl); - -static struct parisc_driver lasi_driver = { - .name = "serial_1", - .id_table = lasi_tbl, - .probe = serial_init_chip, -}; - -static struct parisc_driver serial_driver = { - .name = "serial", - .id_table = serial_tbl, - .probe = serial_init_chip, -}; - -static int __init probe_serial_gsc(void) -{ - register_parisc_driver(&lasi_driver); - register_parisc_driver(&serial_driver); - return 0; -} - -module_init(probe_serial_gsc); - -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/8250_hp300.c b/drivers/serial/8250_hp300.c deleted file mode 100644 index c13438c93012..000000000000 --- a/drivers/serial/8250_hp300.c +++ /dev/null @@ -1,327 +0,0 @@ -/* - * Driver for the 98626/98644/internal serial interface on hp300/hp400 - * (based on the National Semiconductor INS8250/NS16550AF/WD16C552 UARTs) - * - * Ported from 2.2 and modified to use the normal 8250 driver - * by Kars de Jong <jongk@linux-m68k.org>, May 2004. - */ -#include <linux/module.h> -#include <linux/init.h> -#include <linux/string.h> -#include <linux/kernel.h> -#include <linux/serial.h> -#include <linux/serial_core.h> -#include <linux/serial_8250.h> -#include <linux/delay.h> -#include <linux/dio.h> -#include <linux/console.h> -#include <linux/slab.h> -#include <asm/io.h> - -#include "8250.h" - -#if !defined(CONFIG_HPDCA) && !defined(CONFIG_HPAPCI) -#warning CONFIG_8250 defined but neither CONFIG_HPDCA nor CONFIG_HPAPCI defined, are you sure? -#endif - -#ifdef CONFIG_HPAPCI -struct hp300_port -{ - struct hp300_port *next; /* next port */ - int line; /* line (tty) number */ -}; - -static struct hp300_port *hp300_ports; -#endif - -#ifdef CONFIG_HPDCA - -static int __devinit hpdca_init_one(struct dio_dev *d, - const struct dio_device_id *ent); -static void __devexit hpdca_remove_one(struct dio_dev *d); - -static struct dio_device_id hpdca_dio_tbl[] = { - { DIO_ID_DCA0 }, - { DIO_ID_DCA0REM }, - { DIO_ID_DCA1 }, - { DIO_ID_DCA1REM }, - { 0 } -}; - -static struct dio_driver hpdca_driver = { - .name = "hpdca", - .id_table = hpdca_dio_tbl, - .probe = hpdca_init_one, - .remove = __devexit_p(hpdca_remove_one), -}; - -#endif - -static unsigned int num_ports; - -extern int hp300_uart_scode; - -/* Offset to UART registers from base of DCA */ -#define UART_OFFSET 17 - -#define DCA_ID 0x01 /* ID (read), reset (write) */ -#define DCA_IC 0x03 /* Interrupt control */ - -/* Interrupt control */ -#define DCA_IC_IE 0x80 /* Master interrupt enable */ - -#define HPDCA_BAUD_BASE 153600 - -/* Base address of the Frodo part */ -#define FRODO_BASE (0x41c000) - -/* - * Where we find the 8250-like APCI ports, and how far apart they are. - */ -#define FRODO_APCIBASE 0x0 -#define FRODO_APCISPACE 0x20 -#define FRODO_APCI_OFFSET(x) (FRODO_APCIBASE + ((x) * FRODO_APCISPACE)) - -#define HPAPCI_BAUD_BASE 500400 - -#ifdef CONFIG_SERIAL_8250_CONSOLE -/* - * Parse the bootinfo to find descriptions for headless console and - * debug serial ports and register them with the 8250 driver. - * This function should be called before serial_console_init() is called - * to make sure the serial console will be available for use. IA-64 kernel - * calls this function from setup_arch() after the EFI and ACPI tables have - * been parsed. - */ -int __init hp300_setup_serial_console(void) -{ - int scode; - struct uart_port port; - - memset(&port, 0, sizeof(port)); - - if (hp300_uart_scode < 0 || hp300_uart_scode > DIO_SCMAX) - return 0; - - if (DIO_SCINHOLE(hp300_uart_scode)) - return 0; - - scode = hp300_uart_scode; - - /* Memory mapped I/O */ - port.iotype = UPIO_MEM; - port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF; - port.type = PORT_UNKNOWN; - - /* Check for APCI console */ - if (scode == 256) { -#ifdef CONFIG_HPAPCI - printk(KERN_INFO "Serial console is HP APCI 1\n"); - - port.uartclk = HPAPCI_BAUD_BASE * 16; - port.mapbase = (FRODO_BASE + FRODO_APCI_OFFSET(1)); - port.membase = (char *)(port.mapbase + DIO_VIRADDRBASE); - port.regshift = 2; - add_preferred_console("ttyS", port.line, "9600n8"); -#else - printk(KERN_WARNING "Serial console is APCI but support is disabled (CONFIG_HPAPCI)!\n"); - return 0; -#endif - } else { -#ifdef CONFIG_HPDCA - unsigned long pa = dio_scodetophysaddr(scode); - if (!pa) - return 0; - - printk(KERN_INFO "Serial console is HP DCA at select code %d\n", scode); - - port.uartclk = HPDCA_BAUD_BASE * 16; - port.mapbase = (pa + UART_OFFSET); - port.membase = (char *)(port.mapbase + DIO_VIRADDRBASE); - port.regshift = 1; - port.irq = DIO_IPL(pa + DIO_VIRADDRBASE); - - /* Enable board-interrupts */ - out_8(pa + DIO_VIRADDRBASE + DCA_IC, DCA_IC_IE); - - if (DIO_ID(pa + DIO_VIRADDRBASE) & 0x80) - add_preferred_console("ttyS", port.line, "9600n8"); -#else - printk(KERN_WARNING "Serial console is DCA but support is disabled (CONFIG_HPDCA)!\n"); - return 0; -#endif - } - - if (early_serial_setup(&port) < 0) - printk(KERN_WARNING "hp300_setup_serial_console(): early_serial_setup() failed.\n"); - return 0; -} -#endif /* CONFIG_SERIAL_8250_CONSOLE */ - -#ifdef CONFIG_HPDCA -static int __devinit hpdca_init_one(struct dio_dev *d, - const struct dio_device_id *ent) -{ - struct uart_port port; - int line; - -#ifdef CONFIG_SERIAL_8250_CONSOLE - if (hp300_uart_scode == d->scode) { - /* Already got it. */ - return 0; - } -#endif - memset(&port, 0, sizeof(struct uart_port)); - - /* Memory mapped I/O */ - port.iotype = UPIO_MEM; - port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF; - port.irq = d->ipl; - port.uartclk = HPDCA_BAUD_BASE * 16; - port.mapbase = (d->resource.start + UART_OFFSET); - port.membase = (char *)(port.mapbase + DIO_VIRADDRBASE); - port.regshift = 1; - port.dev = &d->dev; - line = serial8250_register_port(&port); - - if (line < 0) { - printk(KERN_NOTICE "8250_hp300: register_serial() DCA scode %d" - " irq %d failed\n", d->scode, port.irq); - return -ENOMEM; - } - - /* Enable board-interrupts */ - out_8(d->resource.start + DIO_VIRADDRBASE + DCA_IC, DCA_IC_IE); - dio_set_drvdata(d, (void *)line); - - /* Reset the DCA */ - out_8(d->resource.start + DIO_VIRADDRBASE + DCA_ID, 0xff); - udelay(100); - - num_ports++; - - return 0; -} -#endif - -static int __init hp300_8250_init(void) -{ - static int called; -#ifdef CONFIG_HPAPCI - int line; - unsigned long base; - struct uart_port uport; - struct hp300_port *port; - int i; -#endif - if (called) - return -ENODEV; - called = 1; - - if (!MACH_IS_HP300) - return -ENODEV; - -#ifdef CONFIG_HPDCA - dio_register_driver(&hpdca_driver); -#endif -#ifdef CONFIG_HPAPCI - if (hp300_model < HP_400) { - if (!num_ports) - return -ENODEV; - return 0; - } - /* These models have the Frodo chip. - * Port 0 is reserved for the Apollo Domain keyboard. - * Port 1 is either the console or the DCA. - */ - for (i = 1; i < 4; i++) { - /* Port 1 is the console on a 425e, on other machines it's - * mapped to DCA. - */ -#ifdef CONFIG_SERIAL_8250_CONSOLE - if (i == 1) - continue; -#endif - - /* Create new serial device */ - port = kmalloc(sizeof(struct hp300_port), GFP_KERNEL); - if (!port) - return -ENOMEM; - - memset(&uport, 0, sizeof(struct uart_port)); - - base = (FRODO_BASE + FRODO_APCI_OFFSET(i)); - - /* Memory mapped I/O */ - uport.iotype = UPIO_MEM; - uport.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ \ - | UPF_BOOT_AUTOCONF; - /* XXX - no interrupt support yet */ - uport.irq = 0; - uport.uartclk = HPAPCI_BAUD_BASE * 16; - uport.mapbase = base; - uport.membase = (char *)(base + DIO_VIRADDRBASE); - uport.regshift = 2; - - line = serial8250_register_port(&uport); - - if (line < 0) { - printk(KERN_NOTICE "8250_hp300: register_serial() APCI" - " %d irq %d failed\n", i, uport.irq); - kfree(port); - continue; - } - - port->line = line; - port->next = hp300_ports; - hp300_ports = port; - - num_ports++; - } -#endif - - /* Any boards found? */ - if (!num_ports) - return -ENODEV; - - return 0; -} - -#ifdef CONFIG_HPDCA -static void __devexit hpdca_remove_one(struct dio_dev *d) -{ - int line; - - line = (int) dio_get_drvdata(d); - if (d->resource.start) { - /* Disable board-interrupts */ - out_8(d->resource.start + DIO_VIRADDRBASE + DCA_IC, 0); - } - serial8250_unregister_port(line); -} -#endif - -static void __exit hp300_8250_exit(void) -{ -#ifdef CONFIG_HPAPCI - struct hp300_port *port, *to_free; - - for (port = hp300_ports; port; ) { - serial8250_unregister_port(port->line); - to_free = port; - port = port->next; - kfree(to_free); - } - - hp300_ports = NULL; -#endif -#ifdef CONFIG_HPDCA - dio_unregister_driver(&hpdca_driver); -#endif -} - -module_init(hp300_8250_init); -module_exit(hp300_8250_exit); -MODULE_DESCRIPTION("HP DCA/APCI serial driver"); -MODULE_AUTHOR("Kars de Jong <jongk@linux-m68k.org>"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/8250_hub6.c b/drivers/serial/8250_hub6.c deleted file mode 100644 index 7609150e7d5e..000000000000 --- a/drivers/serial/8250_hub6.c +++ /dev/null @@ -1,58 +0,0 @@ -/* - * linux/drivers/serial/8250_hub6.c - * - * Copyright (C) 2005 Russell King. - * Data taken from include/asm-i386/serial.h - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/module.h> -#include <linux/init.h> -#include <linux/serial_8250.h> - -#define HUB6(card,port) \ - { \ - .iobase = 0x302, \ - .irq = 3, \ - .uartclk = 1843200, \ - .iotype = UPIO_HUB6, \ - .flags = UPF_BOOT_AUTOCONF, \ - .hub6 = (card) << 6 | (port) << 3 | 1, \ - } - -static struct plat_serial8250_port hub6_data[] = { - HUB6(0, 0), - HUB6(0, 1), - HUB6(0, 2), - HUB6(0, 3), - HUB6(0, 4), - HUB6(0, 5), - HUB6(1, 0), - HUB6(1, 1), - HUB6(1, 2), - HUB6(1, 3), - HUB6(1, 4), - HUB6(1, 5), - { }, -}; - -static struct platform_device hub6_device = { - .name = "serial8250", - .id = PLAT8250_DEV_HUB6, - .dev = { - .platform_data = hub6_data, - }, -}; - -static int __init hub6_init(void) -{ - return platform_device_register(&hub6_device); -} - -module_init(hub6_init); - -MODULE_AUTHOR("Russell King"); -MODULE_DESCRIPTION("8250 serial probe module for Hub6 cards"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/8250_mca.c b/drivers/serial/8250_mca.c deleted file mode 100644 index d10be944ad44..000000000000 --- a/drivers/serial/8250_mca.c +++ /dev/null @@ -1,63 +0,0 @@ -/* - * linux/drivers/serial/8250_mca.c - * - * Copyright (C) 2005 Russell King. - * Data taken from include/asm-i386/serial.h - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/module.h> -#include <linux/init.h> -#include <linux/mca.h> -#include <linux/serial_8250.h> - -/* - * FIXME: Should we be doing AUTO_IRQ here? - */ -#ifdef CONFIG_SERIAL_8250_DETECT_IRQ -#define MCA_FLAGS UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ -#else -#define MCA_FLAGS UPF_BOOT_AUTOCONF | UPF_SKIP_TEST -#endif - -#define PORT(_base,_irq) \ - { \ - .iobase = _base, \ - .irq = _irq, \ - .uartclk = 1843200, \ - .iotype = UPIO_PORT, \ - .flags = MCA_FLAGS, \ - } - -static struct plat_serial8250_port mca_data[] = { - PORT(0x3220, 3), - PORT(0x3228, 3), - PORT(0x4220, 3), - PORT(0x4228, 3), - PORT(0x5220, 3), - PORT(0x5228, 3), - { }, -}; - -static struct platform_device mca_device = { - .name = "serial8250", - .id = PLAT8250_DEV_MCA, - .dev = { - .platform_data = mca_data, - }, -}; - -static int __init mca_init(void) -{ - if (!MCA_bus) - return -ENODEV; - return platform_device_register(&mca_device); -} - -module_init(mca_init); - -MODULE_AUTHOR("Russell King"); -MODULE_DESCRIPTION("8250 serial probe module for MCA ports"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/8250_pci.c b/drivers/serial/8250_pci.c deleted file mode 100644 index 8b8930f700b5..000000000000 --- a/drivers/serial/8250_pci.c +++ /dev/null @@ -1,3850 +0,0 @@ -/* - * linux/drivers/char/8250_pci.c - * - * Probe module for 8250/16550-type PCI serial ports. - * - * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. - * - * Copyright (C) 2001 Russell King, All Rights Reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License. - */ -#include <linux/module.h> -#include <linux/init.h> -#include <linux/pci.h> -#include <linux/string.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/tty.h> -#include <linux/serial_core.h> -#include <linux/8250_pci.h> -#include <linux/bitops.h> - -#include <asm/byteorder.h> -#include <asm/io.h> - -#include "8250.h" - -#undef SERIAL_DEBUG_PCI - -/* - * init function returns: - * > 0 - number of ports - * = 0 - use board->num_ports - * < 0 - error - */ -struct pci_serial_quirk { - u32 vendor; - u32 device; - u32 subvendor; - u32 subdevice; - int (*init)(struct pci_dev *dev); - int (*setup)(struct serial_private *, - const struct pciserial_board *, - struct uart_port *, int); - void (*exit)(struct pci_dev *dev); -}; - -#define PCI_NUM_BAR_RESOURCES 6 - -struct serial_private { - struct pci_dev *dev; - unsigned int nr; - void __iomem *remapped_bar[PCI_NUM_BAR_RESOURCES]; - struct pci_serial_quirk *quirk; - int line[0]; -}; - -static void moan_device(const char *str, struct pci_dev *dev) -{ - printk(KERN_WARNING - "%s: %s\n" - "Please send the output of lspci -vv, this\n" - "message (0x%04x,0x%04x,0x%04x,0x%04x), the\n" - "manufacturer and name of serial board or\n" - "modem board to rmk+serial@arm.linux.org.uk.\n", - pci_name(dev), str, dev->vendor, dev->device, - dev->subsystem_vendor, dev->subsystem_device); -} - -static int -setup_port(struct serial_private *priv, struct uart_port *port, - int bar, int offset, int regshift) -{ - struct pci_dev *dev = priv->dev; - unsigned long base, len; - - if (bar >= PCI_NUM_BAR_RESOURCES) - return -EINVAL; - - base = pci_resource_start(dev, bar); - - if (pci_resource_flags(dev, bar) & IORESOURCE_MEM) { - len = pci_resource_len(dev, bar); - - if (!priv->remapped_bar[bar]) - priv->remapped_bar[bar] = ioremap_nocache(base, len); - if (!priv->remapped_bar[bar]) - return -ENOMEM; - - port->iotype = UPIO_MEM; - port->iobase = 0; - port->mapbase = base + offset; - port->membase = priv->remapped_bar[bar] + offset; - port->regshift = regshift; - } else { - port->iotype = UPIO_PORT; - port->iobase = base + offset; - port->mapbase = 0; - port->membase = NULL; - port->regshift = 0; - } - return 0; -} - -/* - * ADDI-DATA GmbH communication cards <info@addi-data.com> - */ -static int addidata_apci7800_setup(struct serial_private *priv, - const struct pciserial_board *board, - struct uart_port *port, int idx) -{ - unsigned int bar = 0, offset = board->first_offset; - bar = FL_GET_BASE(board->flags); - - if (idx < 2) { - offset += idx * board->uart_offset; - } else if ((idx >= 2) && (idx < 4)) { - bar += 1; - offset += ((idx - 2) * board->uart_offset); - } else if ((idx >= 4) && (idx < 6)) { - bar += 2; - offset += ((idx - 4) * board->uart_offset); - } else if (idx >= 6) { - bar += 3; - offset += ((idx - 6) * board->uart_offset); - } - - return setup_port(priv, port, bar, offset, board->reg_shift); -} - -/* - * AFAVLAB uses a different mixture of BARs and offsets - * Not that ugly ;) -- HW - */ -static int -afavlab_setup(struct serial_private *priv, const struct pciserial_board *board, - struct uart_port *port, int idx) -{ - unsigned int bar, offset = board->first_offset; - - bar = FL_GET_BASE(board->flags); - if (idx < 4) - bar += idx; - else { - bar = 4; - offset += (idx - 4) * board->uart_offset; - } - - return setup_port(priv, port, bar, offset, board->reg_shift); -} - -/* - * HP's Remote Management Console. The Diva chip came in several - * different versions. N-class, L2000 and A500 have two Diva chips, each - * with 3 UARTs (the third UART on the second chip is unused). Superdome - * and Keystone have one Diva chip with 3 UARTs. Some later machines have - * one Diva chip, but it has been expanded to 5 UARTs. - */ -static int pci_hp_diva_init(struct pci_dev *dev) -{ - int rc = 0; - - switch (dev->subsystem_device) { - case PCI_DEVICE_ID_HP_DIVA_TOSCA1: - case PCI_DEVICE_ID_HP_DIVA_HALFDOME: - case PCI_DEVICE_ID_HP_DIVA_KEYSTONE: - case PCI_DEVICE_ID_HP_DIVA_EVEREST: - rc = 3; - break; - case PCI_DEVICE_ID_HP_DIVA_TOSCA2: - rc = 2; - break; - case PCI_DEVICE_ID_HP_DIVA_MAESTRO: - rc = 4; - break; - case PCI_DEVICE_ID_HP_DIVA_POWERBAR: - case PCI_DEVICE_ID_HP_DIVA_HURRICANE: - rc = 1; - break; - } - - return rc; -} - -/* - * HP's Diva chip puts the 4th/5th serial port further out, and - * some serial ports are supposed to be hidden on certain models. - */ -static int -pci_hp_diva_setup(struct serial_private *priv, - const struct pciserial_board *board, - struct uart_port *port, int idx) -{ - unsigned int offset = board->first_offset; - unsigned int bar = FL_GET_BASE(board->flags); - - switch (priv->dev->subsystem_device) { - case PCI_DEVICE_ID_HP_DIVA_MAESTRO: - if (idx == 3) - idx++; - break; - case PCI_DEVICE_ID_HP_DIVA_EVEREST: - if (idx > 0) - idx++; - if (idx > 2) - idx++; - break; - } - if (idx > 2) - offset = 0x18; - - offset += idx * board->uart_offset; - - return setup_port(priv, port, bar, offset, board->reg_shift); -} - -/* - * Added for EKF Intel i960 serial boards - */ -static int pci_inteli960ni_init(struct pci_dev *dev) -{ - unsigned long oldval; - - if (!(dev->subsystem_device & 0x1000)) - return -ENODEV; - - /* is firmware started? */ - pci_read_config_dword(dev, 0x44, (void *)&oldval); - if (oldval == 0x00001000L) { /* RESET value */ - printk(KERN_DEBUG "Local i960 firmware missing"); - return -ENODEV; - } - return 0; -} - -/* - * Some PCI serial cards using the PLX 9050 PCI interface chip require - * that the card interrupt be explicitly enabled or disabled. This - * seems to be mainly needed on card using the PLX which also use I/O - * mapped memory. - */ -static int pci_plx9050_init(struct pci_dev *dev) -{ - u8 irq_config; - void __iomem *p; - - if ((pci_resource_flags(dev, 0) & IORESOURCE_MEM) == 0) { - moan_device("no memory in bar 0", dev); - return 0; - } - - irq_config = 0x41; - if (dev->vendor == PCI_VENDOR_ID_PANACOM || - dev->subsystem_vendor == PCI_SUBVENDOR_ID_EXSYS) - irq_config = 0x43; - - if ((dev->vendor == PCI_VENDOR_ID_PLX) && - (dev->device == PCI_DEVICE_ID_PLX_ROMULUS)) - /* - * As the megawolf cards have the int pins active - * high, and have 2 UART chips, both ints must be - * enabled on the 9050. Also, the UARTS are set in - * 16450 mode by default, so we have to enable the - * 16C950 'enhanced' mode so that we can use the - * deep FIFOs - */ - irq_config = 0x5b; - /* - * enable/disable interrupts - */ - p = ioremap_nocache(pci_resource_start(dev, 0), 0x80); - if (p == NULL) - return -ENOMEM; - writel(irq_config, p + 0x4c); - - /* - * Read the register back to ensure that it took effect. - */ - readl(p + 0x4c); - iounmap(p); - - return 0; -} - -static void __devexit pci_plx9050_exit(struct pci_dev *dev) -{ - u8 __iomem *p; - - if ((pci_resource_flags(dev, 0) & IORESOURCE_MEM) == 0) - return; - - /* - * disable interrupts - */ - p = ioremap_nocache(pci_resource_start(dev, 0), 0x80); - if (p != NULL) { - writel(0, p + 0x4c); - - /* - * Read the register back to ensure that it took effect. - */ - readl(p + 0x4c); - iounmap(p); - } -} - -#define NI8420_INT_ENABLE_REG 0x38 -#define NI8420_INT_ENABLE_BIT 0x2000 - -static void __devexit pci_ni8420_exit(struct pci_dev *dev) -{ - void __iomem *p; - unsigned long base, len; - unsigned int bar = 0; - - if ((pci_resource_flags(dev, bar) & IORESOURCE_MEM) == 0) { - moan_device("no memory in bar", dev); - return; - } - - base = pci_resource_start(dev, bar); - len = pci_resource_len(dev, bar); - p = ioremap_nocache(base, len); - if (p == NULL) - return; - - /* Disable the CPU Interrupt */ - writel(readl(p + NI8420_INT_ENABLE_REG) & ~(NI8420_INT_ENABLE_BIT), - p + NI8420_INT_ENABLE_REG); - iounmap(p); -} - - -/* MITE registers */ -#define MITE_IOWBSR1 0xc4 -#define MITE_IOWCR1 0xf4 -#define MITE_LCIMR1 0x08 -#define MITE_LCIMR2 0x10 - -#define MITE_LCIMR2_CLR_CPU_IE (1 << 30) - -static void __devexit pci_ni8430_exit(struct pci_dev *dev) -{ - void __iomem *p; - unsigned long base, len; - unsigned int bar = 0; - - if ((pci_resource_flags(dev, bar) & IORESOURCE_MEM) == 0) { - moan_device("no memory in bar", dev); - return; - } - - base = pci_resource_start(dev, bar); - len = pci_resource_len(dev, bar); - p = ioremap_nocache(base, len); - if (p == NULL) - return; - - /* Disable the CPU Interrupt */ - writel(MITE_LCIMR2_CLR_CPU_IE, p + MITE_LCIMR2); - iounmap(p); -} - -/* SBS Technologies Inc. PMC-OCTPRO and P-OCTAL cards */ -static int -sbs_setup(struct serial_private *priv, const struct pciserial_board *board, - struct uart_port *port, int idx) -{ - unsigned int bar, offset = board->first_offset; - - bar = 0; - - if (idx < 4) { - /* first four channels map to 0, 0x100, 0x200, 0x300 */ - offset += idx * board->uart_offset; - } else if (idx < 8) { - /* last four channels map to 0x1000, 0x1100, 0x1200, 0x1300 */ - offset += idx * board->uart_offset + 0xC00; - } else /* we have only 8 ports on PMC-OCTALPRO */ - return 1; - - return setup_port(priv, port, bar, offset, board->reg_shift); -} - -/* -* This does initialization for PMC OCTALPRO cards: -* maps the device memory, resets the UARTs (needed, bc -* if the module is removed and inserted again, the card -* is in the sleep mode) and enables global interrupt. -*/ - -/* global control register offset for SBS PMC-OctalPro */ -#define OCT_REG_CR_OFF 0x500 - -static int sbs_init(struct pci_dev *dev) -{ - u8 __iomem *p; - - p = pci_ioremap_bar(dev, 0); - - if (p == NULL) - return -ENOMEM; - /* Set bit-4 Control Register (UART RESET) in to reset the uarts */ - writeb(0x10, p + OCT_REG_CR_OFF); - udelay(50); - writeb(0x0, p + OCT_REG_CR_OFF); - - /* Set bit-2 (INTENABLE) of Control Register */ - writeb(0x4, p + OCT_REG_CR_OFF); - iounmap(p); - - return 0; -} - -/* - * Disables the global interrupt of PMC-OctalPro - */ - -static void __devexit sbs_exit(struct pci_dev *dev) -{ - u8 __iomem *p; - - p = pci_ioremap_bar(dev, 0); - /* FIXME: What if resource_len < OCT_REG_CR_OFF */ - if (p != NULL) - writeb(0, p + OCT_REG_CR_OFF); - iounmap(p); -} - -/* - * SIIG serial cards have an PCI interface chip which also controls - * the UART clocking frequency. Each UART can be clocked independently - * (except cards equiped with 4 UARTs) and initial clocking settings - * are stored in the EEPROM chip. It can cause problems because this - * version of serial driver doesn't support differently clocked UART's - * on single PCI card. To prevent this, initialization functions set - * high frequency clocking for all UART's on given card. It is safe (I - * hope) because it doesn't touch EEPROM settings to prevent conflicts - * with other OSes (like M$ DOS). - * - * SIIG support added by Andrey Panin <pazke@donpac.ru>, 10/1999 - * - * There is two family of SIIG serial cards with different PCI - * interface chip and different configuration methods: - * - 10x cards have control registers in IO and/or memory space; - * - 20x cards have control registers in standard PCI configuration space. - * - * Note: all 10x cards have PCI device ids 0x10.. - * all 20x cards have PCI device ids 0x20.. - * - * There are also Quartet Serial cards which use Oxford Semiconductor - * 16954 quad UART PCI chip clocked by 18.432 MHz quartz. - * - * Note: some SIIG cards are probed by the parport_serial object. - */ - -#define PCI_DEVICE_ID_SIIG_1S_10x (PCI_DEVICE_ID_SIIG_1S_10x_550 & 0xfffc) -#define PCI_DEVICE_ID_SIIG_2S_10x (PCI_DEVICE_ID_SIIG_2S_10x_550 & 0xfff8) - -static int pci_siig10x_init(struct pci_dev *dev) -{ - u16 data; - void __iomem *p; - - switch (dev->device & 0xfff8) { - case PCI_DEVICE_ID_SIIG_1S_10x: /* 1S */ - data = 0xffdf; - break; - case PCI_DEVICE_ID_SIIG_2S_10x: /* 2S, 2S1P */ - data = 0xf7ff; - break; - default: /* 1S1P, 4S */ - data = 0xfffb; - break; - } - - p = ioremap_nocache(pci_resource_start(dev, 0), 0x80); - if (p == NULL) - return -ENOMEM; - - writew(readw(p + 0x28) & data, p + 0x28); - readw(p + 0x28); - iounmap(p); - return 0; -} - -#define PCI_DEVICE_ID_SIIG_2S_20x (PCI_DEVICE_ID_SIIG_2S_20x_550 & 0xfffc) -#define PCI_DEVICE_ID_SIIG_2S1P_20x (PCI_DEVICE_ID_SIIG_2S1P_20x_550 & 0xfffc) - -static int pci_siig20x_init(struct pci_dev *dev) -{ - u8 data; - - /* Change clock frequency for the first UART. */ - pci_read_config_byte(dev, 0x6f, &data); - pci_write_config_byte(dev, 0x6f, data & 0xef); - - /* If this card has 2 UART, we have to do the same with second UART. */ - if (((dev->device & 0xfffc) == PCI_DEVICE_ID_SIIG_2S_20x) || - ((dev->device & 0xfffc) == PCI_DEVICE_ID_SIIG_2S1P_20x)) { - pci_read_config_byte(dev, 0x73, &data); - pci_write_config_byte(dev, 0x73, data & 0xef); - } - return 0; -} - -static int pci_siig_init(struct pci_dev *dev) -{ - unsigned int type = dev->device & 0xff00; - - if (type == 0x1000) - return pci_siig10x_init(dev); - else if (type == 0x2000) - return pci_siig20x_init(dev); - - moan_device("Unknown SIIG card", dev); - return -ENODEV; -} - -static int pci_siig_setup(struct serial_private *priv, - const struct pciserial_board *board, - struct uart_port *port, int idx) -{ - unsigned int bar = FL_GET_BASE(board->flags) + idx, offset = 0; - - if (idx > 3) { - bar = 4; - offset = (idx - 4) * 8; - } - - return setup_port(priv, port, bar, offset, 0); -} - -/* - * Timedia has an explosion of boards, and to avoid the PCI table from - * growing *huge*, we use this function to collapse some 70 entries - * in the PCI table into one, for sanity's and compactness's sake. - */ -static const unsigned short timedia_single_port[] = { - 0x4025, 0x4027, 0x4028, 0x5025, 0x5027, 0 -}; - -static const unsigned short timedia_dual_port[] = { - 0x0002, 0x4036, 0x4037, 0x4038, 0x4078, 0x4079, 0x4085, - 0x4088, 0x4089, 0x5037, 0x5078, 0x5079, 0x5085, 0x6079, - 0x7079, 0x8079, 0x8137, 0x8138, 0x8237, 0x8238, 0x9079, - 0x9137, 0x9138, 0x9237, 0x9238, 0xA079, 0xB079, 0xC079, - 0xD079, 0 -}; - -static const unsigned short timedia_quad_port[] = { - 0x4055, 0x4056, 0x4095, 0x4096, 0x5056, 0x8156, 0x8157, - 0x8256, 0x8257, 0x9056, 0x9156, 0x9157, 0x9158, 0x9159, - 0x9256, 0x9257, 0xA056, 0xA157, 0xA158, 0xA159, 0xB056, - 0xB157, 0 -}; - -static const unsigned short timedia_eight_port[] = { - 0x4065, 0x4066, 0x5065, 0x5066, 0x8166, 0x9066, 0x9166, - 0x9167, 0x9168, 0xA066, 0xA167, 0xA168, 0 -}; - -static const struct timedia_struct { - int num; - const unsigned short *ids; -} timedia_data[] = { - { 1, timedia_single_port }, - { 2, timedia_dual_port }, - { 4, timedia_quad_port }, - { 8, timedia_eight_port } -}; - -static int pci_timedia_init(struct pci_dev *dev) -{ - const unsigned short *ids; - int i, j; - - for (i = 0; i < ARRAY_SIZE(timedia_data); i++) { - ids = timedia_data[i].ids; - for (j = 0; ids[j]; j++) - if (dev->subsystem_device == ids[j]) - return timedia_data[i].num; - } - return 0; -} - -/* - * Timedia/SUNIX uses a mixture of BARs and offsets - * Ugh, this is ugly as all hell --- TYT - */ -static int -pci_timedia_setup(struct serial_private *priv, - const struct pciserial_board *board, - struct uart_port *port, int idx) -{ - unsigned int bar = 0, offset = board->first_offset; - - switch (idx) { - case 0: - bar = 0; - break; - case 1: - offset = board->uart_offset; - bar = 0; - break; - case 2: - bar = 1; - break; - case 3: - offset = board->uart_offset; - /* FALLTHROUGH */ - case 4: /* BAR 2 */ - case 5: /* BAR 3 */ - case 6: /* BAR 4 */ - case 7: /* BAR 5 */ - bar = idx - 2; - } - - return setup_port(priv, port, bar, offset, board->reg_shift); -} - -/* - * Some Titan cards are also a little weird - */ -static int -titan_400l_800l_setup(struct serial_private *priv, - const struct pciserial_board *board, - struct uart_port *port, int idx) -{ - unsigned int bar, offset = board->first_offset; - - switch (idx) { - case 0: - bar = 1; - break; - case 1: - bar = 2; - break; - default: - bar = 4; - offset = (idx - 2) * board->uart_offset; - } - - return setup_port(priv, port, bar, offset, board->reg_shift); -} - -static int pci_xircom_init(struct pci_dev *dev) -{ - msleep(100); - return 0; -} - -static int pci_ni8420_init(struct pci_dev *dev) -{ - void __iomem *p; - unsigned long base, len; - unsigned int bar = 0; - - if ((pci_resource_flags(dev, bar) & IORESOURCE_MEM) == 0) { - moan_device("no memory in bar", dev); - return 0; - } - - base = pci_resource_start(dev, bar); - len = pci_resource_len(dev, bar); - p = ioremap_nocache(base, len); - if (p == NULL) - return -ENOMEM; - - /* Enable CPU Interrupt */ - writel(readl(p + NI8420_INT_ENABLE_REG) | NI8420_INT_ENABLE_BIT, - p + NI8420_INT_ENABLE_REG); - - iounmap(p); - return 0; -} - -#define MITE_IOWBSR1_WSIZE 0xa -#define MITE_IOWBSR1_WIN_OFFSET 0x800 -#define MITE_IOWBSR1_WENAB (1 << 7) -#define MITE_LCIMR1_IO_IE_0 (1 << 24) -#define MITE_LCIMR2_SET_CPU_IE (1 << 31) -#define MITE_IOWCR1_RAMSEL_MASK 0xfffffffe - -static int pci_ni8430_init(struct pci_dev *dev) -{ - void __iomem *p; - unsigned long base, len; - u32 device_window; - unsigned int bar = 0; - - if ((pci_resource_flags(dev, bar) & IORESOURCE_MEM) == 0) { - moan_device("no memory in bar", dev); - return 0; - } - - base = pci_resource_start(dev, bar); - len = pci_resource_len(dev, bar); - p = ioremap_nocache(base, len); - if (p == NULL) - return -ENOMEM; - - /* Set device window address and size in BAR0 */ - device_window = ((base + MITE_IOWBSR1_WIN_OFFSET) & 0xffffff00) - | MITE_IOWBSR1_WENAB | MITE_IOWBSR1_WSIZE; - writel(device_window, p + MITE_IOWBSR1); - - /* Set window access to go to RAMSEL IO address space */ - writel((readl(p + MITE_IOWCR1) & MITE_IOWCR1_RAMSEL_MASK), - p + MITE_IOWCR1); - - /* Enable IO Bus Interrupt 0 */ - writel(MITE_LCIMR1_IO_IE_0, p + MITE_LCIMR1); - - /* Enable CPU Interrupt */ - writel(MITE_LCIMR2_SET_CPU_IE, p + MITE_LCIMR2); - - iounmap(p); - return 0; -} - -/* UART Port Control Register */ -#define NI8430_PORTCON 0x0f -#define NI8430_PORTCON_TXVR_ENABLE (1 << 3) - -static int -pci_ni8430_setup(struct serial_private *priv, - const struct pciserial_board *board, - struct uart_port *port, int idx) -{ - void __iomem *p; - unsigned long base, len; - unsigned int bar, offset = board->first_offset; - - if (idx >= board->num_ports) - return 1; - - bar = FL_GET_BASE(board->flags); - offset += idx * board->uart_offset; - - base = pci_resource_start(priv->dev, bar); - len = pci_resource_len(priv->dev, bar); - p = ioremap_nocache(base, len); - - /* enable the transciever */ - writeb(readb(p + offset + NI8430_PORTCON) | NI8430_PORTCON_TXVR_ENABLE, - p + offset + NI8430_PORTCON); - - iounmap(p); - - return setup_port(priv, port, bar, offset, board->reg_shift); -} - - -static int pci_netmos_init(struct pci_dev *dev) -{ - /* subdevice 0x00PS means <P> parallel, <S> serial */ - unsigned int num_serial = dev->subsystem_device & 0xf; - - if ((dev->device == PCI_DEVICE_ID_NETMOS_9901) || - (dev->device == PCI_DEVICE_ID_NETMOS_9865)) - return 0; - if (dev->subsystem_vendor == PCI_VENDOR_ID_IBM && - dev->subsystem_device == 0x0299) - return 0; - - if (num_serial == 0) - return -ENODEV; - return num_serial; -} - -/* - * These chips are available with optionally one parallel port and up to - * two serial ports. Unfortunately they all have the same product id. - * - * Basic configuration is done over a region of 32 I/O ports. The base - * ioport is called INTA or INTC, depending on docs/other drivers. - * - * The region of the 32 I/O ports is configured in POSIO0R... - */ - -/* registers */ -#define ITE_887x_MISCR 0x9c -#define ITE_887x_INTCBAR 0x78 -#define ITE_887x_UARTBAR 0x7c -#define ITE_887x_PS0BAR 0x10 -#define ITE_887x_POSIO0 0x60 - -/* I/O space size */ -#define ITE_887x_IOSIZE 32 -/* I/O space size (bits 26-24; 8 bytes = 011b) */ -#define ITE_887x_POSIO_IOSIZE_8 (3 << 24) -/* I/O space size (bits 26-24; 32 bytes = 101b) */ -#define ITE_887x_POSIO_IOSIZE_32 (5 << 24) -/* Decoding speed (1 = slow, 2 = medium, 3 = fast) */ -#define ITE_887x_POSIO_SPEED (3 << 29) -/* enable IO_Space bit */ -#define ITE_887x_POSIO_ENABLE (1 << 31) - -static int pci_ite887x_init(struct pci_dev *dev) -{ - /* inta_addr are the configuration addresses of the ITE */ - static const short inta_addr[] = { 0x2a0, 0x2c0, 0x220, 0x240, 0x1e0, - 0x200, 0x280, 0 }; - int ret, i, type; - struct resource *iobase = NULL; - u32 miscr, uartbar, ioport; - - /* search for the base-ioport */ - i = 0; - while (inta_addr[i] && iobase == NULL) { - iobase = request_region(inta_addr[i], ITE_887x_IOSIZE, - "ite887x"); - if (iobase != NULL) { - /* write POSIO0R - speed | size | ioport */ - pci_write_config_dword(dev, ITE_887x_POSIO0, - ITE_887x_POSIO_ENABLE | ITE_887x_POSIO_SPEED | - ITE_887x_POSIO_IOSIZE_32 | inta_addr[i]); - /* write INTCBAR - ioport */ - pci_write_config_dword(dev, ITE_887x_INTCBAR, - inta_addr[i]); - ret = inb(inta_addr[i]); - if (ret != 0xff) { - /* ioport connected */ - break; - } - release_region(iobase->start, ITE_887x_IOSIZE); - iobase = NULL; - } - i++; - } - - if (!inta_addr[i]) { - printk(KERN_ERR "ite887x: could not find iobase\n"); - return -ENODEV; - } - - /* start of undocumented type checking (see parport_pc.c) */ - type = inb(iobase->start + 0x18) & 0x0f; - - switch (type) { - case 0x2: /* ITE8871 (1P) */ - case 0xa: /* ITE8875 (1P) */ - ret = 0; - break; - case 0xe: /* ITE8872 (2S1P) */ - ret = 2; - break; - case 0x6: /* ITE8873 (1S) */ - ret = 1; - break; - case 0x8: /* ITE8874 (2S) */ - ret = 2; - break; - default: - moan_device("Unknown ITE887x", dev); - ret = -ENODEV; - } - - /* configure all serial ports */ - for (i = 0; i < ret; i++) { - /* read the I/O port from the device */ - pci_read_config_dword(dev, ITE_887x_PS0BAR + (0x4 * (i + 1)), - &ioport); - ioport &= 0x0000FF00; /* the actual base address */ - pci_write_config_dword(dev, ITE_887x_POSIO0 + (0x4 * (i + 1)), - ITE_887x_POSIO_ENABLE | ITE_887x_POSIO_SPEED | - ITE_887x_POSIO_IOSIZE_8 | ioport); - - /* write the ioport to the UARTBAR */ - pci_read_config_dword(dev, ITE_887x_UARTBAR, &uartbar); - uartbar &= ~(0xffff << (16 * i)); /* clear half the reg */ - uartbar |= (ioport << (16 * i)); /* set the ioport */ - pci_write_config_dword(dev, ITE_887x_UARTBAR, uartbar); - - /* get current config */ - pci_read_config_dword(dev, ITE_887x_MISCR, &miscr); - /* disable interrupts (UARTx_Routing[3:0]) */ - miscr &= ~(0xf << (12 - 4 * i)); - /* activate the UART (UARTx_En) */ - miscr |= 1 << (23 - i); - /* write new config with activated UART */ - pci_write_config_dword(dev, ITE_887x_MISCR, miscr); - } - - if (ret <= 0) { - /* the device has no UARTs if we get here */ - release_region(iobase->start, ITE_887x_IOSIZE); - } - - return ret; -} - -static void __devexit pci_ite887x_exit(struct pci_dev *dev) -{ - u32 ioport; - /* the ioport is bit 0-15 in POSIO0R */ - pci_read_config_dword(dev, ITE_887x_POSIO0, &ioport); - ioport &= 0xffff; - release_region(ioport, ITE_887x_IOSIZE); -} - -/* - * Oxford Semiconductor Inc. - * Check that device is part of the Tornado range of devices, then determine - * the number of ports available on the device. - */ -static int pci_oxsemi_tornado_init(struct pci_dev *dev) -{ - u8 __iomem *p; - unsigned long deviceID; - unsigned int number_uarts = 0; - - /* OxSemi Tornado devices are all 0xCxxx */ - if (dev->vendor == PCI_VENDOR_ID_OXSEMI && - (dev->device & 0xF000) != 0xC000) - return 0; - - p = pci_iomap(dev, 0, 5); - if (p == NULL) - return -ENOMEM; - - deviceID = ioread32(p); - /* Tornado device */ - if (deviceID == 0x07000200) { - number_uarts = ioread8(p + 4); - printk(KERN_DEBUG - "%d ports detected on Oxford PCI Express device\n", - number_uarts); - } - pci_iounmap(dev, p); - return number_uarts; -} - -static int -pci_default_setup(struct serial_private *priv, - const struct pciserial_board *board, - struct uart_port *port, int idx) -{ - unsigned int bar, offset = board->first_offset, maxnr; - - bar = FL_GET_BASE(board->flags); - if (board->flags & FL_BASE_BARS) - bar += idx; - else - offset += idx * board->uart_offset; - - maxnr = (pci_resource_len(priv->dev, bar) - board->first_offset) >> - (board->reg_shift + 3); - - if (board->flags & FL_REGION_SZ_CAP && idx >= maxnr) - return 1; - - return setup_port(priv, port, bar, offset, board->reg_shift); -} - -static int -ce4100_serial_setup(struct serial_private *priv, - const struct pciserial_board *board, - struct uart_port *port, int idx) -{ - int ret; - - ret = setup_port(priv, port, 0, 0, board->reg_shift); - port->iotype = UPIO_MEM32; - port->type = PORT_XSCALE; - port->flags = (port->flags | UPF_FIXED_PORT | UPF_FIXED_TYPE); - port->regshift = 2; - - return ret; -} - -static int skip_tx_en_setup(struct serial_private *priv, - const struct pciserial_board *board, - struct uart_port *port, int idx) -{ - port->flags |= UPF_NO_TXEN_TEST; - printk(KERN_DEBUG "serial8250: skipping TxEn test for device " - "[%04x:%04x] subsystem [%04x:%04x]\n", - priv->dev->vendor, - priv->dev->device, - priv->dev->subsystem_vendor, - priv->dev->subsystem_device); - - return pci_default_setup(priv, board, port, idx); -} - -/* This should be in linux/pci_ids.h */ -#define PCI_VENDOR_ID_SBSMODULARIO 0x124B -#define PCI_SUBVENDOR_ID_SBSMODULARIO 0x124B -#define PCI_DEVICE_ID_OCTPRO 0x0001 -#define PCI_SUBDEVICE_ID_OCTPRO232 0x0108 -#define PCI_SUBDEVICE_ID_OCTPRO422 0x0208 -#define PCI_SUBDEVICE_ID_POCTAL232 0x0308 -#define PCI_SUBDEVICE_ID_POCTAL422 0x0408 -#define PCI_VENDOR_ID_ADVANTECH 0x13fe -#define PCI_DEVICE_ID_INTEL_CE4100_UART 0x2e66 -#define PCI_DEVICE_ID_ADVANTECH_PCI3620 0x3620 -#define PCI_DEVICE_ID_TITAN_200I 0x8028 -#define PCI_DEVICE_ID_TITAN_400I 0x8048 -#define PCI_DEVICE_ID_TITAN_800I 0x8088 -#define PCI_DEVICE_ID_TITAN_800EH 0xA007 -#define PCI_DEVICE_ID_TITAN_800EHB 0xA008 -#define PCI_DEVICE_ID_TITAN_400EH 0xA009 -#define PCI_DEVICE_ID_TITAN_100E 0xA010 -#define PCI_DEVICE_ID_TITAN_200E 0xA012 -#define PCI_DEVICE_ID_TITAN_400E 0xA013 -#define PCI_DEVICE_ID_TITAN_800E 0xA014 -#define PCI_DEVICE_ID_TITAN_200EI 0xA016 -#define PCI_DEVICE_ID_TITAN_200EISI 0xA017 -#define PCI_DEVICE_ID_OXSEMI_16PCI958 0x9538 - -/* Unknown vendors/cards - this should not be in linux/pci_ids.h */ -#define PCI_SUBDEVICE_ID_UNKNOWN_0x1584 0x1584 - -/* - * Master list of serial port init/setup/exit quirks. - * This does not describe the general nature of the port. - * (ie, baud base, number and location of ports, etc) - * - * This list is ordered alphabetically by vendor then device. - * Specific entries must come before more generic entries. - */ -static struct pci_serial_quirk pci_serial_quirks[] __refdata = { - /* - * ADDI-DATA GmbH communication cards <info@addi-data.com> - */ - { - .vendor = PCI_VENDOR_ID_ADDIDATA_OLD, - .device = PCI_DEVICE_ID_ADDIDATA_APCI7800, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .setup = addidata_apci7800_setup, - }, - /* - * AFAVLAB cards - these may be called via parport_serial - * It is not clear whether this applies to all products. - */ - { - .vendor = PCI_VENDOR_ID_AFAVLAB, - .device = PCI_ANY_ID, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .setup = afavlab_setup, - }, - /* - * HP Diva - */ - { - .vendor = PCI_VENDOR_ID_HP, - .device = PCI_DEVICE_ID_HP_DIVA, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_hp_diva_init, - .setup = pci_hp_diva_setup, - }, - /* - * Intel - */ - { - .vendor = PCI_VENDOR_ID_INTEL, - .device = PCI_DEVICE_ID_INTEL_80960_RP, - .subvendor = 0xe4bf, - .subdevice = PCI_ANY_ID, - .init = pci_inteli960ni_init, - .setup = pci_default_setup, - }, - { - .vendor = PCI_VENDOR_ID_INTEL, - .device = PCI_DEVICE_ID_INTEL_8257X_SOL, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .setup = skip_tx_en_setup, - }, - { - .vendor = PCI_VENDOR_ID_INTEL, - .device = PCI_DEVICE_ID_INTEL_82573L_SOL, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .setup = skip_tx_en_setup, - }, - { - .vendor = PCI_VENDOR_ID_INTEL, - .device = PCI_DEVICE_ID_INTEL_82573E_SOL, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .setup = skip_tx_en_setup, - }, - { - .vendor = PCI_VENDOR_ID_INTEL, - .device = PCI_DEVICE_ID_INTEL_CE4100_UART, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .setup = ce4100_serial_setup, - }, - /* - * ITE - */ - { - .vendor = PCI_VENDOR_ID_ITE, - .device = PCI_DEVICE_ID_ITE_8872, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_ite887x_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_ite887x_exit), - }, - /* - * National Instruments - */ - { - .vendor = PCI_VENDOR_ID_NI, - .device = PCI_DEVICE_ID_NI_PCI23216, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_ni8420_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_ni8420_exit), - }, - { - .vendor = PCI_VENDOR_ID_NI, - .device = PCI_DEVICE_ID_NI_PCI2328, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_ni8420_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_ni8420_exit), - }, - { - .vendor = PCI_VENDOR_ID_NI, - .device = PCI_DEVICE_ID_NI_PCI2324, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_ni8420_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_ni8420_exit), - }, - { - .vendor = PCI_VENDOR_ID_NI, - .device = PCI_DEVICE_ID_NI_PCI2322, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_ni8420_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_ni8420_exit), - }, - { - .vendor = PCI_VENDOR_ID_NI, - .device = PCI_DEVICE_ID_NI_PCI2324I, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_ni8420_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_ni8420_exit), - }, - { - .vendor = PCI_VENDOR_ID_NI, - .device = PCI_DEVICE_ID_NI_PCI2322I, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_ni8420_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_ni8420_exit), - }, - { - .vendor = PCI_VENDOR_ID_NI, - .device = PCI_DEVICE_ID_NI_PXI8420_23216, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_ni8420_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_ni8420_exit), - }, - { - .vendor = PCI_VENDOR_ID_NI, - .device = PCI_DEVICE_ID_NI_PXI8420_2328, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_ni8420_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_ni8420_exit), - }, - { - .vendor = PCI_VENDOR_ID_NI, - .device = PCI_DEVICE_ID_NI_PXI8420_2324, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_ni8420_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_ni8420_exit), - }, - { - .vendor = PCI_VENDOR_ID_NI, - .device = PCI_DEVICE_ID_NI_PXI8420_2322, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_ni8420_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_ni8420_exit), - }, - { - .vendor = PCI_VENDOR_ID_NI, - .device = PCI_DEVICE_ID_NI_PXI8422_2324, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_ni8420_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_ni8420_exit), - }, - { - .vendor = PCI_VENDOR_ID_NI, - .device = PCI_DEVICE_ID_NI_PXI8422_2322, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_ni8420_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_ni8420_exit), - }, - { - .vendor = PCI_VENDOR_ID_NI, - .device = PCI_ANY_ID, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_ni8430_init, - .setup = pci_ni8430_setup, - .exit = __devexit_p(pci_ni8430_exit), - }, - /* - * Panacom - */ - { - .vendor = PCI_VENDOR_ID_PANACOM, - .device = PCI_DEVICE_ID_PANACOM_QUADMODEM, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_plx9050_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_plx9050_exit), - }, - { - .vendor = PCI_VENDOR_ID_PANACOM, - .device = PCI_DEVICE_ID_PANACOM_DUALMODEM, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_plx9050_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_plx9050_exit), - }, - /* - * PLX - */ - { - .vendor = PCI_VENDOR_ID_PLX, - .device = PCI_DEVICE_ID_PLX_9030, - .subvendor = PCI_SUBVENDOR_ID_PERLE, - .subdevice = PCI_ANY_ID, - .setup = pci_default_setup, - }, - { - .vendor = PCI_VENDOR_ID_PLX, - .device = PCI_DEVICE_ID_PLX_9050, - .subvendor = PCI_SUBVENDOR_ID_EXSYS, - .subdevice = PCI_SUBDEVICE_ID_EXSYS_4055, - .init = pci_plx9050_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_plx9050_exit), - }, - { - .vendor = PCI_VENDOR_ID_PLX, - .device = PCI_DEVICE_ID_PLX_9050, - .subvendor = PCI_SUBVENDOR_ID_KEYSPAN, - .subdevice = PCI_SUBDEVICE_ID_KEYSPAN_SX2, - .init = pci_plx9050_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_plx9050_exit), - }, - { - .vendor = PCI_VENDOR_ID_PLX, - .device = PCI_DEVICE_ID_PLX_9050, - .subvendor = PCI_VENDOR_ID_PLX, - .subdevice = PCI_SUBDEVICE_ID_UNKNOWN_0x1584, - .init = pci_plx9050_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_plx9050_exit), - }, - { - .vendor = PCI_VENDOR_ID_PLX, - .device = PCI_DEVICE_ID_PLX_ROMULUS, - .subvendor = PCI_VENDOR_ID_PLX, - .subdevice = PCI_DEVICE_ID_PLX_ROMULUS, - .init = pci_plx9050_init, - .setup = pci_default_setup, - .exit = __devexit_p(pci_plx9050_exit), - }, - /* - * SBS Technologies, Inc., PMC-OCTALPRO 232 - */ - { - .vendor = PCI_VENDOR_ID_SBSMODULARIO, - .device = PCI_DEVICE_ID_OCTPRO, - .subvendor = PCI_SUBVENDOR_ID_SBSMODULARIO, - .subdevice = PCI_SUBDEVICE_ID_OCTPRO232, - .init = sbs_init, - .setup = sbs_setup, - .exit = __devexit_p(sbs_exit), - }, - /* - * SBS Technologies, Inc., PMC-OCTALPRO 422 - */ - { - .vendor = PCI_VENDOR_ID_SBSMODULARIO, - .device = PCI_DEVICE_ID_OCTPRO, - .subvendor = PCI_SUBVENDOR_ID_SBSMODULARIO, - .subdevice = PCI_SUBDEVICE_ID_OCTPRO422, - .init = sbs_init, - .setup = sbs_setup, - .exit = __devexit_p(sbs_exit), - }, - /* - * SBS Technologies, Inc., P-Octal 232 - */ - { - .vendor = PCI_VENDOR_ID_SBSMODULARIO, - .device = PCI_DEVICE_ID_OCTPRO, - .subvendor = PCI_SUBVENDOR_ID_SBSMODULARIO, - .subdevice = PCI_SUBDEVICE_ID_POCTAL232, - .init = sbs_init, - .setup = sbs_setup, - .exit = __devexit_p(sbs_exit), - }, - /* - * SBS Technologies, Inc., P-Octal 422 - */ - { - .vendor = PCI_VENDOR_ID_SBSMODULARIO, - .device = PCI_DEVICE_ID_OCTPRO, - .subvendor = PCI_SUBVENDOR_ID_SBSMODULARIO, - .subdevice = PCI_SUBDEVICE_ID_POCTAL422, - .init = sbs_init, - .setup = sbs_setup, - .exit = __devexit_p(sbs_exit), - }, - /* - * SIIG cards - these may be called via parport_serial - */ - { - .vendor = PCI_VENDOR_ID_SIIG, - .device = PCI_ANY_ID, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_siig_init, - .setup = pci_siig_setup, - }, - /* - * Titan cards - */ - { - .vendor = PCI_VENDOR_ID_TITAN, - .device = PCI_DEVICE_ID_TITAN_400L, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .setup = titan_400l_800l_setup, - }, - { - .vendor = PCI_VENDOR_ID_TITAN, - .device = PCI_DEVICE_ID_TITAN_800L, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .setup = titan_400l_800l_setup, - }, - /* - * Timedia cards - */ - { - .vendor = PCI_VENDOR_ID_TIMEDIA, - .device = PCI_DEVICE_ID_TIMEDIA_1889, - .subvendor = PCI_VENDOR_ID_TIMEDIA, - .subdevice = PCI_ANY_ID, - .init = pci_timedia_init, - .setup = pci_timedia_setup, - }, - { - .vendor = PCI_VENDOR_ID_TIMEDIA, - .device = PCI_ANY_ID, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .setup = pci_timedia_setup, - }, - /* - * Xircom cards - */ - { - .vendor = PCI_VENDOR_ID_XIRCOM, - .device = PCI_DEVICE_ID_XIRCOM_X3201_MDM, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_xircom_init, - .setup = pci_default_setup, - }, - /* - * Netmos cards - these may be called via parport_serial - */ - { - .vendor = PCI_VENDOR_ID_NETMOS, - .device = PCI_ANY_ID, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_netmos_init, - .setup = pci_default_setup, - }, - /* - * For Oxford Semiconductor and Mainpine - */ - { - .vendor = PCI_VENDOR_ID_OXSEMI, - .device = PCI_ANY_ID, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_oxsemi_tornado_init, - .setup = pci_default_setup, - }, - { - .vendor = PCI_VENDOR_ID_MAINPINE, - .device = PCI_ANY_ID, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .init = pci_oxsemi_tornado_init, - .setup = pci_default_setup, - }, - /* - * Default "match everything" terminator entry - */ - { - .vendor = PCI_ANY_ID, - .device = PCI_ANY_ID, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .setup = pci_default_setup, - } -}; - -static inline int quirk_id_matches(u32 quirk_id, u32 dev_id) -{ - return quirk_id == PCI_ANY_ID || quirk_id == dev_id; -} - -static struct pci_serial_quirk *find_quirk(struct pci_dev *dev) -{ - struct pci_serial_quirk *quirk; - - for (quirk = pci_serial_quirks; ; quirk++) - if (quirk_id_matches(quirk->vendor, dev->vendor) && - quirk_id_matches(quirk->device, dev->device) && - quirk_id_matches(quirk->subvendor, dev->subsystem_vendor) && - quirk_id_matches(quirk->subdevice, dev->subsystem_device)) - break; - return quirk; -} - -static inline int get_pci_irq(struct pci_dev *dev, - const struct pciserial_board *board) -{ - if (board->flags & FL_NOIRQ) - return 0; - else - return dev->irq; -} - -/* - * This is the configuration table for all of the PCI serial boards - * which we support. It is directly indexed by the pci_board_num_t enum - * value, which is encoded in the pci_device_id PCI probe table's - * driver_data member. - * - * The makeup of these names are: - * pbn_bn{_bt}_n_baud{_offsetinhex} - * - * bn = PCI BAR number - * bt = Index using PCI BARs - * n = number of serial ports - * baud = baud rate - * offsetinhex = offset for each sequential port (in hex) - * - * This table is sorted by (in order): bn, bt, baud, offsetindex, n. - * - * Please note: in theory if n = 1, _bt infix should make no difference. - * ie, pbn_b0_1_115200 is the same as pbn_b0_bt_1_115200 - */ -enum pci_board_num_t { - pbn_default = 0, - - pbn_b0_1_115200, - pbn_b0_2_115200, - pbn_b0_4_115200, - pbn_b0_5_115200, - pbn_b0_8_115200, - - pbn_b0_1_921600, - pbn_b0_2_921600, - pbn_b0_4_921600, - - pbn_b0_2_1130000, - - pbn_b0_4_1152000, - - pbn_b0_2_1843200, - pbn_b0_4_1843200, - - pbn_b0_2_1843200_200, - pbn_b0_4_1843200_200, - pbn_b0_8_1843200_200, - - pbn_b0_1_4000000, - - pbn_b0_bt_1_115200, - pbn_b0_bt_2_115200, - pbn_b0_bt_4_115200, - pbn_b0_bt_8_115200, - - pbn_b0_bt_1_460800, - pbn_b0_bt_2_460800, - pbn_b0_bt_4_460800, - - pbn_b0_bt_1_921600, - pbn_b0_bt_2_921600, - pbn_b0_bt_4_921600, - pbn_b0_bt_8_921600, - - pbn_b1_1_115200, - pbn_b1_2_115200, - pbn_b1_4_115200, - pbn_b1_8_115200, - pbn_b1_16_115200, - - pbn_b1_1_921600, - pbn_b1_2_921600, - pbn_b1_4_921600, - pbn_b1_8_921600, - - pbn_b1_2_1250000, - - pbn_b1_bt_1_115200, - pbn_b1_bt_2_115200, - pbn_b1_bt_4_115200, - - pbn_b1_bt_2_921600, - - pbn_b1_1_1382400, - pbn_b1_2_1382400, - pbn_b1_4_1382400, - pbn_b1_8_1382400, - - pbn_b2_1_115200, - pbn_b2_2_115200, - pbn_b2_4_115200, - pbn_b2_8_115200, - - pbn_b2_1_460800, - pbn_b2_4_460800, - pbn_b2_8_460800, - pbn_b2_16_460800, - - pbn_b2_1_921600, - pbn_b2_4_921600, - pbn_b2_8_921600, - - pbn_b2_8_1152000, - - pbn_b2_bt_1_115200, - pbn_b2_bt_2_115200, - pbn_b2_bt_4_115200, - - pbn_b2_bt_2_921600, - pbn_b2_bt_4_921600, - - pbn_b3_2_115200, - pbn_b3_4_115200, - pbn_b3_8_115200, - - pbn_b4_bt_2_921600, - pbn_b4_bt_4_921600, - pbn_b4_bt_8_921600, - - /* - * Board-specific versions. - */ - pbn_panacom, - pbn_panacom2, - pbn_panacom4, - pbn_exsys_4055, - pbn_plx_romulus, - pbn_oxsemi, - pbn_oxsemi_1_4000000, - pbn_oxsemi_2_4000000, - pbn_oxsemi_4_4000000, - pbn_oxsemi_8_4000000, - pbn_intel_i960, - pbn_sgi_ioc3, - pbn_computone_4, - pbn_computone_6, - pbn_computone_8, - pbn_sbsxrsio, - pbn_exar_XR17C152, - pbn_exar_XR17C154, - pbn_exar_XR17C158, - pbn_exar_ibm_saturn, - pbn_pasemi_1682M, - pbn_ni8430_2, - pbn_ni8430_4, - pbn_ni8430_8, - pbn_ni8430_16, - pbn_ADDIDATA_PCIe_1_3906250, - pbn_ADDIDATA_PCIe_2_3906250, - pbn_ADDIDATA_PCIe_4_3906250, - pbn_ADDIDATA_PCIe_8_3906250, - pbn_ce4100_1_115200, -}; - -/* - * uart_offset - the space between channels - * reg_shift - describes how the UART registers are mapped - * to PCI memory by the card. - * For example IER register on SBS, Inc. PMC-OctPro is located at - * offset 0x10 from the UART base, while UART_IER is defined as 1 - * in include/linux/serial_reg.h, - * see first lines of serial_in() and serial_out() in 8250.c -*/ - -static struct pciserial_board pci_boards[] __devinitdata = { - [pbn_default] = { - .flags = FL_BASE0, - .num_ports = 1, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b0_1_115200] = { - .flags = FL_BASE0, - .num_ports = 1, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b0_2_115200] = { - .flags = FL_BASE0, - .num_ports = 2, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b0_4_115200] = { - .flags = FL_BASE0, - .num_ports = 4, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b0_5_115200] = { - .flags = FL_BASE0, - .num_ports = 5, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b0_8_115200] = { - .flags = FL_BASE0, - .num_ports = 8, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b0_1_921600] = { - .flags = FL_BASE0, - .num_ports = 1, - .base_baud = 921600, - .uart_offset = 8, - }, - [pbn_b0_2_921600] = { - .flags = FL_BASE0, - .num_ports = 2, - .base_baud = 921600, - .uart_offset = 8, - }, - [pbn_b0_4_921600] = { - .flags = FL_BASE0, - .num_ports = 4, - .base_baud = 921600, - .uart_offset = 8, - }, - - [pbn_b0_2_1130000] = { - .flags = FL_BASE0, - .num_ports = 2, - .base_baud = 1130000, - .uart_offset = 8, - }, - - [pbn_b0_4_1152000] = { - .flags = FL_BASE0, - .num_ports = 4, - .base_baud = 1152000, - .uart_offset = 8, - }, - - [pbn_b0_2_1843200] = { - .flags = FL_BASE0, - .num_ports = 2, - .base_baud = 1843200, - .uart_offset = 8, - }, - [pbn_b0_4_1843200] = { - .flags = FL_BASE0, - .num_ports = 4, - .base_baud = 1843200, - .uart_offset = 8, - }, - - [pbn_b0_2_1843200_200] = { - .flags = FL_BASE0, - .num_ports = 2, - .base_baud = 1843200, - .uart_offset = 0x200, - }, - [pbn_b0_4_1843200_200] = { - .flags = FL_BASE0, - .num_ports = 4, - .base_baud = 1843200, - .uart_offset = 0x200, - }, - [pbn_b0_8_1843200_200] = { - .flags = FL_BASE0, - .num_ports = 8, - .base_baud = 1843200, - .uart_offset = 0x200, - }, - [pbn_b0_1_4000000] = { - .flags = FL_BASE0, - .num_ports = 1, - .base_baud = 4000000, - .uart_offset = 8, - }, - - [pbn_b0_bt_1_115200] = { - .flags = FL_BASE0|FL_BASE_BARS, - .num_ports = 1, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b0_bt_2_115200] = { - .flags = FL_BASE0|FL_BASE_BARS, - .num_ports = 2, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b0_bt_4_115200] = { - .flags = FL_BASE0|FL_BASE_BARS, - .num_ports = 4, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b0_bt_8_115200] = { - .flags = FL_BASE0|FL_BASE_BARS, - .num_ports = 8, - .base_baud = 115200, - .uart_offset = 8, - }, - - [pbn_b0_bt_1_460800] = { - .flags = FL_BASE0|FL_BASE_BARS, - .num_ports = 1, - .base_baud = 460800, - .uart_offset = 8, - }, - [pbn_b0_bt_2_460800] = { - .flags = FL_BASE0|FL_BASE_BARS, - .num_ports = 2, - .base_baud = 460800, - .uart_offset = 8, - }, - [pbn_b0_bt_4_460800] = { - .flags = FL_BASE0|FL_BASE_BARS, - .num_ports = 4, - .base_baud = 460800, - .uart_offset = 8, - }, - - [pbn_b0_bt_1_921600] = { - .flags = FL_BASE0|FL_BASE_BARS, - .num_ports = 1, - .base_baud = 921600, - .uart_offset = 8, - }, - [pbn_b0_bt_2_921600] = { - .flags = FL_BASE0|FL_BASE_BARS, - .num_ports = 2, - .base_baud = 921600, - .uart_offset = 8, - }, - [pbn_b0_bt_4_921600] = { - .flags = FL_BASE0|FL_BASE_BARS, - .num_ports = 4, - .base_baud = 921600, - .uart_offset = 8, - }, - [pbn_b0_bt_8_921600] = { - .flags = FL_BASE0|FL_BASE_BARS, - .num_ports = 8, - .base_baud = 921600, - .uart_offset = 8, - }, - - [pbn_b1_1_115200] = { - .flags = FL_BASE1, - .num_ports = 1, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b1_2_115200] = { - .flags = FL_BASE1, - .num_ports = 2, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b1_4_115200] = { - .flags = FL_BASE1, - .num_ports = 4, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b1_8_115200] = { - .flags = FL_BASE1, - .num_ports = 8, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b1_16_115200] = { - .flags = FL_BASE1, - .num_ports = 16, - .base_baud = 115200, - .uart_offset = 8, - }, - - [pbn_b1_1_921600] = { - .flags = FL_BASE1, - .num_ports = 1, - .base_baud = 921600, - .uart_offset = 8, - }, - [pbn_b1_2_921600] = { - .flags = FL_BASE1, - .num_ports = 2, - .base_baud = 921600, - .uart_offset = 8, - }, - [pbn_b1_4_921600] = { - .flags = FL_BASE1, - .num_ports = 4, - .base_baud = 921600, - .uart_offset = 8, - }, - [pbn_b1_8_921600] = { - .flags = FL_BASE1, - .num_ports = 8, - .base_baud = 921600, - .uart_offset = 8, - }, - [pbn_b1_2_1250000] = { - .flags = FL_BASE1, - .num_ports = 2, - .base_baud = 1250000, - .uart_offset = 8, - }, - - [pbn_b1_bt_1_115200] = { - .flags = FL_BASE1|FL_BASE_BARS, - .num_ports = 1, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b1_bt_2_115200] = { - .flags = FL_BASE1|FL_BASE_BARS, - .num_ports = 2, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b1_bt_4_115200] = { - .flags = FL_BASE1|FL_BASE_BARS, - .num_ports = 4, - .base_baud = 115200, - .uart_offset = 8, - }, - - [pbn_b1_bt_2_921600] = { - .flags = FL_BASE1|FL_BASE_BARS, - .num_ports = 2, - .base_baud = 921600, - .uart_offset = 8, - }, - - [pbn_b1_1_1382400] = { - .flags = FL_BASE1, - .num_ports = 1, - .base_baud = 1382400, - .uart_offset = 8, - }, - [pbn_b1_2_1382400] = { - .flags = FL_BASE1, - .num_ports = 2, - .base_baud = 1382400, - .uart_offset = 8, - }, - [pbn_b1_4_1382400] = { - .flags = FL_BASE1, - .num_ports = 4, - .base_baud = 1382400, - .uart_offset = 8, - }, - [pbn_b1_8_1382400] = { - .flags = FL_BASE1, - .num_ports = 8, - .base_baud = 1382400, - .uart_offset = 8, - }, - - [pbn_b2_1_115200] = { - .flags = FL_BASE2, - .num_ports = 1, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b2_2_115200] = { - .flags = FL_BASE2, - .num_ports = 2, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b2_4_115200] = { - .flags = FL_BASE2, - .num_ports = 4, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b2_8_115200] = { - .flags = FL_BASE2, - .num_ports = 8, - .base_baud = 115200, - .uart_offset = 8, - }, - - [pbn_b2_1_460800] = { - .flags = FL_BASE2, - .num_ports = 1, - .base_baud = 460800, - .uart_offset = 8, - }, - [pbn_b2_4_460800] = { - .flags = FL_BASE2, - .num_ports = 4, - .base_baud = 460800, - .uart_offset = 8, - }, - [pbn_b2_8_460800] = { - .flags = FL_BASE2, - .num_ports = 8, - .base_baud = 460800, - .uart_offset = 8, - }, - [pbn_b2_16_460800] = { - .flags = FL_BASE2, - .num_ports = 16, - .base_baud = 460800, - .uart_offset = 8, - }, - - [pbn_b2_1_921600] = { - .flags = FL_BASE2, - .num_ports = 1, - .base_baud = 921600, - .uart_offset = 8, - }, - [pbn_b2_4_921600] = { - .flags = FL_BASE2, - .num_ports = 4, - .base_baud = 921600, - .uart_offset = 8, - }, - [pbn_b2_8_921600] = { - .flags = FL_BASE2, - .num_ports = 8, - .base_baud = 921600, - .uart_offset = 8, - }, - - [pbn_b2_8_1152000] = { - .flags = FL_BASE2, - .num_ports = 8, - .base_baud = 1152000, - .uart_offset = 8, - }, - - [pbn_b2_bt_1_115200] = { - .flags = FL_BASE2|FL_BASE_BARS, - .num_ports = 1, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b2_bt_2_115200] = { - .flags = FL_BASE2|FL_BASE_BARS, - .num_ports = 2, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b2_bt_4_115200] = { - .flags = FL_BASE2|FL_BASE_BARS, - .num_ports = 4, - .base_baud = 115200, - .uart_offset = 8, - }, - - [pbn_b2_bt_2_921600] = { - .flags = FL_BASE2|FL_BASE_BARS, - .num_ports = 2, - .base_baud = 921600, - .uart_offset = 8, - }, - [pbn_b2_bt_4_921600] = { - .flags = FL_BASE2|FL_BASE_BARS, - .num_ports = 4, - .base_baud = 921600, - .uart_offset = 8, - }, - - [pbn_b3_2_115200] = { - .flags = FL_BASE3, - .num_ports = 2, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b3_4_115200] = { - .flags = FL_BASE3, - .num_ports = 4, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_b3_8_115200] = { - .flags = FL_BASE3, - .num_ports = 8, - .base_baud = 115200, - .uart_offset = 8, - }, - - [pbn_b4_bt_2_921600] = { - .flags = FL_BASE4, - .num_ports = 2, - .base_baud = 921600, - .uart_offset = 8, - }, - [pbn_b4_bt_4_921600] = { - .flags = FL_BASE4, - .num_ports = 4, - .base_baud = 921600, - .uart_offset = 8, - }, - [pbn_b4_bt_8_921600] = { - .flags = FL_BASE4, - .num_ports = 8, - .base_baud = 921600, - .uart_offset = 8, - }, - - /* - * Entries following this are board-specific. - */ - - /* - * Panacom - IOMEM - */ - [pbn_panacom] = { - .flags = FL_BASE2, - .num_ports = 2, - .base_baud = 921600, - .uart_offset = 0x400, - .reg_shift = 7, - }, - [pbn_panacom2] = { - .flags = FL_BASE2|FL_BASE_BARS, - .num_ports = 2, - .base_baud = 921600, - .uart_offset = 0x400, - .reg_shift = 7, - }, - [pbn_panacom4] = { - .flags = FL_BASE2|FL_BASE_BARS, - .num_ports = 4, - .base_baud = 921600, - .uart_offset = 0x400, - .reg_shift = 7, - }, - - [pbn_exsys_4055] = { - .flags = FL_BASE2, - .num_ports = 4, - .base_baud = 115200, - .uart_offset = 8, - }, - - /* I think this entry is broken - the first_offset looks wrong --rmk */ - [pbn_plx_romulus] = { - .flags = FL_BASE2, - .num_ports = 4, - .base_baud = 921600, - .uart_offset = 8 << 2, - .reg_shift = 2, - .first_offset = 0x03, - }, - - /* - * This board uses the size of PCI Base region 0 to - * signal now many ports are available - */ - [pbn_oxsemi] = { - .flags = FL_BASE0|FL_REGION_SZ_CAP, - .num_ports = 32, - .base_baud = 115200, - .uart_offset = 8, - }, - [pbn_oxsemi_1_4000000] = { - .flags = FL_BASE0, - .num_ports = 1, - .base_baud = 4000000, - .uart_offset = 0x200, - .first_offset = 0x1000, - }, - [pbn_oxsemi_2_4000000] = { - .flags = FL_BASE0, - .num_ports = 2, - .base_baud = 4000000, - .uart_offset = 0x200, - .first_offset = 0x1000, - }, - [pbn_oxsemi_4_4000000] = { - .flags = FL_BASE0, - .num_ports = 4, - .base_baud = 4000000, - .uart_offset = 0x200, - .first_offset = 0x1000, - }, - [pbn_oxsemi_8_4000000] = { - .flags = FL_BASE0, - .num_ports = 8, - .base_baud = 4000000, - .uart_offset = 0x200, - .first_offset = 0x1000, - }, - - - /* - * EKF addition for i960 Boards form EKF with serial port. - * Max 256 ports. - */ - [pbn_intel_i960] = { - .flags = FL_BASE0, - .num_ports = 32, - .base_baud = 921600, - .uart_offset = 8 << 2, - .reg_shift = 2, - .first_offset = 0x10000, - }, - [pbn_sgi_ioc3] = { - .flags = FL_BASE0|FL_NOIRQ, - .num_ports = 1, - .base_baud = 458333, - .uart_offset = 8, - .reg_shift = 0, - .first_offset = 0x20178, - }, - - /* - * Computone - uses IOMEM. - */ - [pbn_computone_4] = { - .flags = FL_BASE0, - .num_ports = 4, - .base_baud = 921600, - .uart_offset = 0x40, - .reg_shift = 2, - .first_offset = 0x200, - }, - [pbn_computone_6] = { - .flags = FL_BASE0, - .num_ports = 6, - .base_baud = 921600, - .uart_offset = 0x40, - .reg_shift = 2, - .first_offset = 0x200, - }, - [pbn_computone_8] = { - .flags = FL_BASE0, - .num_ports = 8, - .base_baud = 921600, - .uart_offset = 0x40, - .reg_shift = 2, - .first_offset = 0x200, - }, - [pbn_sbsxrsio] = { - .flags = FL_BASE0, - .num_ports = 8, - .base_baud = 460800, - .uart_offset = 256, - .reg_shift = 4, - }, - /* - * Exar Corp. XR17C15[248] Dual/Quad/Octal UART - * Only basic 16550A support. - * XR17C15[24] are not tested, but they should work. - */ - [pbn_exar_XR17C152] = { - .flags = FL_BASE0, - .num_ports = 2, - .base_baud = 921600, - .uart_offset = 0x200, - }, - [pbn_exar_XR17C154] = { - .flags = FL_BASE0, - .num_ports = 4, - .base_baud = 921600, - .uart_offset = 0x200, - }, - [pbn_exar_XR17C158] = { - .flags = FL_BASE0, - .num_ports = 8, - .base_baud = 921600, - .uart_offset = 0x200, - }, - [pbn_exar_ibm_saturn] = { - .flags = FL_BASE0, - .num_ports = 1, - .base_baud = 921600, - .uart_offset = 0x200, - }, - - /* - * PA Semi PWRficient PA6T-1682M on-chip UART - */ - [pbn_pasemi_1682M] = { - .flags = FL_BASE0, - .num_ports = 1, - .base_baud = 8333333, - }, - /* - * National Instruments 843x - */ - [pbn_ni8430_16] = { - .flags = FL_BASE0, - .num_ports = 16, - .base_baud = 3686400, - .uart_offset = 0x10, - .first_offset = 0x800, - }, - [pbn_ni8430_8] = { - .flags = FL_BASE0, - .num_ports = 8, - .base_baud = 3686400, - .uart_offset = 0x10, - .first_offset = 0x800, - }, - [pbn_ni8430_4] = { - .flags = FL_BASE0, - .num_ports = 4, - .base_baud = 3686400, - .uart_offset = 0x10, - .first_offset = 0x800, - }, - [pbn_ni8430_2] = { - .flags = FL_BASE0, - .num_ports = 2, - .base_baud = 3686400, - .uart_offset = 0x10, - .first_offset = 0x800, - }, - /* - * ADDI-DATA GmbH PCI-Express communication cards <info@addi-data.com> - */ - [pbn_ADDIDATA_PCIe_1_3906250] = { - .flags = FL_BASE0, - .num_ports = 1, - .base_baud = 3906250, - .uart_offset = 0x200, - .first_offset = 0x1000, - }, - [pbn_ADDIDATA_PCIe_2_3906250] = { - .flags = FL_BASE0, - .num_ports = 2, - .base_baud = 3906250, - .uart_offset = 0x200, - .first_offset = 0x1000, - }, - [pbn_ADDIDATA_PCIe_4_3906250] = { - .flags = FL_BASE0, - .num_ports = 4, - .base_baud = 3906250, - .uart_offset = 0x200, - .first_offset = 0x1000, - }, - [pbn_ADDIDATA_PCIe_8_3906250] = { - .flags = FL_BASE0, - .num_ports = 8, - .base_baud = 3906250, - .uart_offset = 0x200, - .first_offset = 0x1000, - }, - [pbn_ce4100_1_115200] = { - .flags = FL_BASE0, - .num_ports = 1, - .base_baud = 921600, - .reg_shift = 2, - }, -}; - -static const struct pci_device_id softmodem_blacklist[] = { - { PCI_VDEVICE(AL, 0x5457), }, /* ALi Corporation M5457 AC'97 Modem */ - { PCI_VDEVICE(MOTOROLA, 0x3052), }, /* Motorola Si3052-based modem */ - { PCI_DEVICE(0x1543, 0x3052), }, /* Si3052-based modem, default IDs */ -}; - -/* - * Given a complete unknown PCI device, try to use some heuristics to - * guess what the configuration might be, based on the pitiful PCI - * serial specs. Returns 0 on success, 1 on failure. - */ -static int __devinit -serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board) -{ - const struct pci_device_id *blacklist; - int num_iomem, num_port, first_port = -1, i; - - /* - * If it is not a communications device or the programming - * interface is greater than 6, give up. - * - * (Should we try to make guesses for multiport serial devices - * later?) - */ - if ((((dev->class >> 8) != PCI_CLASS_COMMUNICATION_SERIAL) && - ((dev->class >> 8) != PCI_CLASS_COMMUNICATION_MODEM)) || - (dev->class & 0xff) > 6) - return -ENODEV; - - /* - * Do not access blacklisted devices that are known not to - * feature serial ports. - */ - for (blacklist = softmodem_blacklist; - blacklist < softmodem_blacklist + ARRAY_SIZE(softmodem_blacklist); - blacklist++) { - if (dev->vendor == blacklist->vendor && - dev->device == blacklist->device) - return -ENODEV; - } - - num_iomem = num_port = 0; - for (i = 0; i < PCI_NUM_BAR_RESOURCES; i++) { - if (pci_resource_flags(dev, i) & IORESOURCE_IO) { - num_port++; - if (first_port == -1) - first_port = i; - } - if (pci_resource_flags(dev, i) & IORESOURCE_MEM) - num_iomem++; - } - - /* - * If there is 1 or 0 iomem regions, and exactly one port, - * use it. We guess the number of ports based on the IO - * region size. - */ - if (num_iomem <= 1 && num_port == 1) { - board->flags = first_port; - board->num_ports = pci_resource_len(dev, first_port) / 8; - return 0; - } - - /* - * Now guess if we've got a board which indexes by BARs. - * Each IO BAR should be 8 bytes, and they should follow - * consecutively. - */ - first_port = -1; - num_port = 0; - for (i = 0; i < PCI_NUM_BAR_RESOURCES; i++) { - if (pci_resource_flags(dev, i) & IORESOURCE_IO && - pci_resource_len(dev, i) == 8 && - (first_port == -1 || (first_port + num_port) == i)) { - num_port++; - if (first_port == -1) - first_port = i; - } - } - - if (num_port > 1) { - board->flags = first_port | FL_BASE_BARS; - board->num_ports = num_port; - return 0; - } - - return -ENODEV; -} - -static inline int -serial_pci_matches(const struct pciserial_board *board, - const struct pciserial_board *guessed) -{ - return - board->num_ports == guessed->num_ports && - board->base_baud == guessed->base_baud && - board->uart_offset == guessed->uart_offset && - board->reg_shift == guessed->reg_shift && - board->first_offset == guessed->first_offset; -} - -struct serial_private * -pciserial_init_ports(struct pci_dev *dev, const struct pciserial_board *board) -{ - struct uart_port serial_port; - struct serial_private *priv; - struct pci_serial_quirk *quirk; - int rc, nr_ports, i; - - nr_ports = board->num_ports; - - /* - * Find an init and setup quirks. - */ - quirk = find_quirk(dev); - - /* - * Run the new-style initialization function. - * The initialization function returns: - * <0 - error - * 0 - use board->num_ports - * >0 - number of ports - */ - if (quirk->init) { - rc = quirk->init(dev); - if (rc < 0) { - priv = ERR_PTR(rc); - goto err_out; - } - if (rc) - nr_ports = rc; - } - - priv = kzalloc(sizeof(struct serial_private) + - sizeof(unsigned int) * nr_ports, - GFP_KERNEL); - if (!priv) { - priv = ERR_PTR(-ENOMEM); - goto err_deinit; - } - - priv->dev = dev; - priv->quirk = quirk; - - memset(&serial_port, 0, sizeof(struct uart_port)); - serial_port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ; - serial_port.uartclk = board->base_baud * 16; - serial_port.irq = get_pci_irq(dev, board); - serial_port.dev = &dev->dev; - - for (i = 0; i < nr_ports; i++) { - if (quirk->setup(priv, board, &serial_port, i)) - break; - -#ifdef SERIAL_DEBUG_PCI - printk(KERN_DEBUG "Setup PCI port: port %lx, irq %d, type %d\n", - serial_port.iobase, serial_port.irq, serial_port.iotype); -#endif - - priv->line[i] = serial8250_register_port(&serial_port); - if (priv->line[i] < 0) { - printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), priv->line[i]); - break; - } - } - priv->nr = i; - return priv; - -err_deinit: - if (quirk->exit) - quirk->exit(dev); -err_out: - return priv; -} -EXPORT_SYMBOL_GPL(pciserial_init_ports); - -void pciserial_remove_ports(struct serial_private *priv) -{ - struct pci_serial_quirk *quirk; - int i; - - for (i = 0; i < priv->nr; i++) - serial8250_unregister_port(priv->line[i]); - - for (i = 0; i < PCI_NUM_BAR_RESOURCES; i++) { - if (priv->remapped_bar[i]) - iounmap(priv->remapped_bar[i]); - priv->remapped_bar[i] = NULL; - } - - /* - * Find the exit quirks. - */ - quirk = find_quirk(priv->dev); - if (quirk->exit) - quirk->exit(priv->dev); - - kfree(priv); -} -EXPORT_SYMBOL_GPL(pciserial_remove_ports); - -void pciserial_suspend_ports(struct serial_private *priv) -{ - int i; - - for (i = 0; i < priv->nr; i++) - if (priv->line[i] >= 0) - serial8250_suspend_port(priv->line[i]); -} -EXPORT_SYMBOL_GPL(pciserial_suspend_ports); - -void pciserial_resume_ports(struct serial_private *priv) -{ - int i; - - /* - * Ensure that the board is correctly configured. - */ - if (priv->quirk->init) - priv->quirk->init(priv->dev); - - for (i = 0; i < priv->nr; i++) - if (priv->line[i] >= 0) - serial8250_resume_port(priv->line[i]); -} -EXPORT_SYMBOL_GPL(pciserial_resume_ports); - -/* - * Probe one serial board. Unfortunately, there is no rhyme nor reason - * to the arrangement of serial ports on a PCI card. - */ -static int __devinit -pciserial_init_one(struct pci_dev *dev, const struct pci_device_id *ent) -{ - struct serial_private *priv; - const struct pciserial_board *board; - struct pciserial_board tmp; - int rc; - - if (ent->driver_data >= ARRAY_SIZE(pci_boards)) { - printk(KERN_ERR "pci_init_one: invalid driver_data: %ld\n", - ent->driver_data); - return -EINVAL; - } - - board = &pci_boards[ent->driver_data]; - - rc = pci_enable_device(dev); - if (rc) - return rc; - - if (ent->driver_data == pbn_default) { - /* - * Use a copy of the pci_board entry for this; - * avoid changing entries in the table. - */ - memcpy(&tmp, board, sizeof(struct pciserial_board)); - board = &tmp; - - /* - * We matched one of our class entries. Try to - * determine the parameters of this board. - */ - rc = serial_pci_guess_board(dev, &tmp); - if (rc) - goto disable; - } else { - /* - * We matched an explicit entry. If we are able to - * detect this boards settings with our heuristic, - * then we no longer need this entry. - */ - memcpy(&tmp, &pci_boards[pbn_default], - sizeof(struct pciserial_board)); - rc = serial_pci_guess_board(dev, &tmp); - if (rc == 0 && serial_pci_matches(board, &tmp)) - moan_device("Redundant entry in serial pci_table.", - dev); - } - - priv = pciserial_init_ports(dev, board); - if (!IS_ERR(priv)) { - pci_set_drvdata(dev, priv); - return 0; - } - - rc = PTR_ERR(priv); - - disable: - pci_disable_device(dev); - return rc; -} - -static void __devexit pciserial_remove_one(struct pci_dev *dev) -{ - struct serial_private *priv = pci_get_drvdata(dev); - - pci_set_drvdata(dev, NULL); - - pciserial_remove_ports(priv); - - pci_disable_device(dev); -} - -#ifdef CONFIG_PM -static int pciserial_suspend_one(struct pci_dev *dev, pm_message_t state) -{ - struct serial_private *priv = pci_get_drvdata(dev); - - if (priv) - pciserial_suspend_ports(priv); - - pci_save_state(dev); - pci_set_power_state(dev, pci_choose_state(dev, state)); - return 0; -} - -static int pciserial_resume_one(struct pci_dev *dev) -{ - int err; - struct serial_private *priv = pci_get_drvdata(dev); - - pci_set_power_state(dev, PCI_D0); - pci_restore_state(dev); - - if (priv) { - /* - * The device may have been disabled. Re-enable it. - */ - err = pci_enable_device(dev); - /* FIXME: We cannot simply error out here */ - if (err) - printk(KERN_ERR "pciserial: Unable to re-enable ports, trying to continue.\n"); - pciserial_resume_ports(priv); - } - return 0; -} -#endif - -static struct pci_device_id serial_pci_tbl[] = { - /* Advantech use PCI_DEVICE_ID_ADVANTECH_PCI3620 (0x3620) as 'PCI_SUBVENDOR_ID' */ - { PCI_VENDOR_ID_ADVANTECH, PCI_DEVICE_ID_ADVANTECH_PCI3620, - PCI_DEVICE_ID_ADVANTECH_PCI3620, 0x0001, 0, 0, - pbn_b2_8_921600 }, - { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_BH8_232, 0, 0, - pbn_b1_8_1382400 }, - { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_BH4_232, 0, 0, - pbn_b1_4_1382400 }, - { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_BH2_232, 0, 0, - pbn_b1_2_1382400 }, - { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V351, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_BH8_232, 0, 0, - pbn_b1_8_1382400 }, - { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V351, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_BH4_232, 0, 0, - pbn_b1_4_1382400 }, - { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V351, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_BH2_232, 0, 0, - pbn_b1_2_1382400 }, - { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V351, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_BH8_485, 0, 0, - pbn_b1_8_921600 }, - { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V351, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_BH8_485_4_4, 0, 0, - pbn_b1_8_921600 }, - { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V351, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_BH4_485, 0, 0, - pbn_b1_4_921600 }, - { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V351, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_BH4_485_2_2, 0, 0, - pbn_b1_4_921600 }, - { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V351, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_BH2_485, 0, 0, - pbn_b1_2_921600 }, - { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V351, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_BH8_485_2_6, 0, 0, - pbn_b1_8_921600 }, - { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V351, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_BH081101V1, 0, 0, - pbn_b1_8_921600 }, - { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V351, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_BH041101V1, 0, 0, - pbn_b1_4_921600 }, - { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V351, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_BH2_20MHZ, 0, 0, - pbn_b1_2_1250000 }, - { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_TITAN_2, 0, 0, - pbn_b0_2_1843200 }, - { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_TITAN_4, 0, 0, - pbn_b0_4_1843200 }, - { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954, - PCI_VENDOR_ID_AFAVLAB, - PCI_SUBDEVICE_ID_AFAVLAB_P061, 0, 0, - pbn_b0_4_1152000 }, - { PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17C152, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_2_232, 0, 0, - pbn_b0_2_1843200_200 }, - { PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17C154, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_4_232, 0, 0, - pbn_b0_4_1843200_200 }, - { PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17C158, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_8_232, 0, 0, - pbn_b0_8_1843200_200 }, - { PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17C152, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_1_1, 0, 0, - pbn_b0_2_1843200_200 }, - { PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17C154, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_2_2, 0, 0, - pbn_b0_4_1843200_200 }, - { PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17C158, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_4_4, 0, 0, - pbn_b0_8_1843200_200 }, - { PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17C152, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_2, 0, 0, - pbn_b0_2_1843200_200 }, - { PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17C154, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_4, 0, 0, - pbn_b0_4_1843200_200 }, - { PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17C158, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_8, 0, 0, - pbn_b0_8_1843200_200 }, - { PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17C152, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_2_485, 0, 0, - pbn_b0_2_1843200_200 }, - { PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17C154, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_4_485, 0, 0, - pbn_b0_4_1843200_200 }, - { PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17C158, - PCI_SUBVENDOR_ID_CONNECT_TECH, - PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_8_485, 0, 0, - pbn_b0_8_1843200_200 }, - { PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17C152, - PCI_VENDOR_ID_IBM, PCI_SUBDEVICE_ID_IBM_SATURN_SERIAL_ONE_PORT, - 0, 0, pbn_exar_ibm_saturn }, - - { PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_U530, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_bt_1_115200 }, - { PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_UCOMM2, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_bt_2_115200 }, - { PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_UCOMM422, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_bt_4_115200 }, - { PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_UCOMM232, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_bt_2_115200 }, - { PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_COMM4, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_bt_4_115200 }, - { PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_COMM8, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_8_115200 }, - { PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_7803, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_8_460800 }, - { PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_UCOMM8, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_8_115200 }, - - { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_GTEK_SERIAL2, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_bt_2_115200 }, - { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_SPCOM200, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_bt_2_921600 }, - /* - * VScom SPCOM800, from sl@s.pl - */ - { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_SPCOM800, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_8_921600 }, - { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_1077, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_4_921600 }, - /* Unknown card - subdevice 0x1584 */ - { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050, - PCI_VENDOR_ID_PLX, - PCI_SUBDEVICE_ID_UNKNOWN_0x1584, 0, 0, - pbn_b0_4_115200 }, - { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050, - PCI_SUBVENDOR_ID_KEYSPAN, - PCI_SUBDEVICE_ID_KEYSPAN_SX2, 0, 0, - pbn_panacom }, - { PCI_VENDOR_ID_PANACOM, PCI_DEVICE_ID_PANACOM_QUADMODEM, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_panacom4 }, - { PCI_VENDOR_ID_PANACOM, PCI_DEVICE_ID_PANACOM_DUALMODEM, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_panacom2 }, - { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9030, - PCI_VENDOR_ID_ESDGMBH, - PCI_DEVICE_ID_ESDGMBH_CPCIASIO4, 0, 0, - pbn_b2_4_115200 }, - { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050, - PCI_SUBVENDOR_ID_CHASE_PCIFAST, - PCI_SUBDEVICE_ID_CHASE_PCIFAST4, 0, 0, - pbn_b2_4_460800 }, - { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050, - PCI_SUBVENDOR_ID_CHASE_PCIFAST, - PCI_SUBDEVICE_ID_CHASE_PCIFAST8, 0, 0, - pbn_b2_8_460800 }, - { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050, - PCI_SUBVENDOR_ID_CHASE_PCIFAST, - PCI_SUBDEVICE_ID_CHASE_PCIFAST16, 0, 0, - pbn_b2_16_460800 }, - { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050, - PCI_SUBVENDOR_ID_CHASE_PCIFAST, - PCI_SUBDEVICE_ID_CHASE_PCIFAST16FMC, 0, 0, - pbn_b2_16_460800 }, - { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050, - PCI_SUBVENDOR_ID_CHASE_PCIRAS, - PCI_SUBDEVICE_ID_CHASE_PCIRAS4, 0, 0, - pbn_b2_4_460800 }, - { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050, - PCI_SUBVENDOR_ID_CHASE_PCIRAS, - PCI_SUBDEVICE_ID_CHASE_PCIRAS8, 0, 0, - pbn_b2_8_460800 }, - { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050, - PCI_SUBVENDOR_ID_EXSYS, - PCI_SUBDEVICE_ID_EXSYS_4055, 0, 0, - pbn_exsys_4055 }, - /* - * Megawolf Romulus PCI Serial Card, from Mike Hudson - * (Exoray@isys.ca) - */ - { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_ROMULUS, - 0x10b5, 0x106a, 0, 0, - pbn_plx_romulus }, - { PCI_VENDOR_ID_QUATECH, PCI_DEVICE_ID_QUATECH_QSC100, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_4_115200 }, - { PCI_VENDOR_ID_QUATECH, PCI_DEVICE_ID_QUATECH_DSC100, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_2_115200 }, - { PCI_VENDOR_ID_QUATECH, PCI_DEVICE_ID_QUATECH_ESC100D, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_8_115200 }, - { PCI_VENDOR_ID_QUATECH, PCI_DEVICE_ID_QUATECH_ESC100M, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_8_115200 }, - { PCI_VENDOR_ID_SPECIALIX, PCI_DEVICE_ID_OXSEMI_16PCI954, - PCI_VENDOR_ID_SPECIALIX, PCI_SUBDEVICE_ID_SPECIALIX_SPEED4, - 0, 0, - pbn_b0_4_921600 }, - { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954, - PCI_SUBVENDOR_ID_SIIG, PCI_SUBDEVICE_ID_SIIG_QUARTET_SERIAL, - 0, 0, - pbn_b0_4_1152000 }, - { PCI_VENDOR_ID_OXSEMI, 0x9505, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_2_921600 }, - - /* - * The below card is a little controversial since it is the - * subject of a PCI vendor/device ID clash. (See - * www.ussg.iu.edu/hypermail/linux/kernel/0303.1/0516.html). - * For now just used the hex ID 0x950a. - */ - { PCI_VENDOR_ID_OXSEMI, 0x950a, - PCI_SUBVENDOR_ID_SIIG, PCI_SUBDEVICE_ID_SIIG_DUAL_SERIAL, 0, 0, - pbn_b0_2_115200 }, - { PCI_VENDOR_ID_OXSEMI, 0x950a, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_2_1130000 }, - { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_C950, - PCI_VENDOR_ID_OXSEMI, PCI_SUBDEVICE_ID_OXSEMI_C950, 0, 0, - pbn_b0_1_921600 }, - { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_4_115200 }, - { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI952, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_2_921600 }, - { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI958, - PCI_ANY_ID , PCI_ANY_ID, 0, 0, - pbn_b2_8_1152000 }, - - /* - * Oxford Semiconductor Inc. Tornado PCI express device range. - */ - { PCI_VENDOR_ID_OXSEMI, 0xc101, /* OXPCIe952 1 Legacy UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc105, /* OXPCIe952 1 Legacy UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc11b, /* OXPCIe952 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc11f, /* OXPCIe952 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc120, /* OXPCIe952 1 Legacy UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc124, /* OXPCIe952 1 Legacy UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc138, /* OXPCIe952 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc13d, /* OXPCIe952 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc140, /* OXPCIe952 1 Legacy UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc141, /* OXPCIe952 1 Legacy UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc144, /* OXPCIe952 1 Legacy UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc145, /* OXPCIe952 1 Legacy UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc158, /* OXPCIe952 2 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_2_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc15d, /* OXPCIe952 2 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_2_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc208, /* OXPCIe954 4 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_4_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc20d, /* OXPCIe954 4 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_4_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc308, /* OXPCIe958 8 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_8_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc30d, /* OXPCIe958 8 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_8_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc40b, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc40f, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc41b, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc41f, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc42b, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc42f, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc43b, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc43f, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc44b, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc44f, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc45b, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc45f, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc46b, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc46f, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc47b, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc47f, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc48b, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc48f, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc49b, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc49f, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc4ab, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc4af, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc4bb, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc4bf, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc4cb, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_OXSEMI, 0xc4cf, /* OXPCIe200 1 Native UART */ - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - /* - * Mainpine Inc. IQ Express "Rev3" utilizing OxSemi Tornado - */ - { PCI_VENDOR_ID_MAINPINE, 0x4000, /* IQ Express 1 Port V.34 Super-G3 Fax */ - PCI_VENDOR_ID_MAINPINE, 0x4001, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_MAINPINE, 0x4000, /* IQ Express 2 Port V.34 Super-G3 Fax */ - PCI_VENDOR_ID_MAINPINE, 0x4002, 0, 0, - pbn_oxsemi_2_4000000 }, - { PCI_VENDOR_ID_MAINPINE, 0x4000, /* IQ Express 4 Port V.34 Super-G3 Fax */ - PCI_VENDOR_ID_MAINPINE, 0x4004, 0, 0, - pbn_oxsemi_4_4000000 }, - { PCI_VENDOR_ID_MAINPINE, 0x4000, /* IQ Express 8 Port V.34 Super-G3 Fax */ - PCI_VENDOR_ID_MAINPINE, 0x4008, 0, 0, - pbn_oxsemi_8_4000000 }, - /* - * SBS Technologies, Inc. P-Octal and PMC-OCTPRO cards, - * from skokodyn@yahoo.com - */ - { PCI_VENDOR_ID_SBSMODULARIO, PCI_DEVICE_ID_OCTPRO, - PCI_SUBVENDOR_ID_SBSMODULARIO, PCI_SUBDEVICE_ID_OCTPRO232, 0, 0, - pbn_sbsxrsio }, - { PCI_VENDOR_ID_SBSMODULARIO, PCI_DEVICE_ID_OCTPRO, - PCI_SUBVENDOR_ID_SBSMODULARIO, PCI_SUBDEVICE_ID_OCTPRO422, 0, 0, - pbn_sbsxrsio }, - { PCI_VENDOR_ID_SBSMODULARIO, PCI_DEVICE_ID_OCTPRO, - PCI_SUBVENDOR_ID_SBSMODULARIO, PCI_SUBDEVICE_ID_POCTAL232, 0, 0, - pbn_sbsxrsio }, - { PCI_VENDOR_ID_SBSMODULARIO, PCI_DEVICE_ID_OCTPRO, - PCI_SUBVENDOR_ID_SBSMODULARIO, PCI_SUBDEVICE_ID_POCTAL422, 0, 0, - pbn_sbsxrsio }, - - /* - * Digitan DS560-558, from jimd@esoft.com - */ - { PCI_VENDOR_ID_ATT, PCI_DEVICE_ID_ATT_VENUS_MODEM, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_1_115200 }, - - /* - * Titan Electronic cards - * The 400L and 800L have a custom setup quirk. - */ - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_100, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_1_921600 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_200, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_2_921600 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_400, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_4_921600 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_800B, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_4_921600 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_100L, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_1_921600 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_200L, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_bt_2_921600 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_400L, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_4_921600 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_800L, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_8_921600 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_200I, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b4_bt_2_921600 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_400I, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b4_bt_4_921600 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_800I, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b4_bt_8_921600 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_400EH, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_4_921600 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_800EH, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_4_921600 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_800EHB, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_4_921600 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_100E, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_1_4000000 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_200E, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_2_4000000 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_400E, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_4_4000000 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_800E, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_8_4000000 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_200EI, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_2_4000000 }, - { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_200EISI, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi_2_4000000 }, - - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S_10x_550, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_1_460800 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S_10x_650, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_1_460800 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S_10x_850, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_1_460800 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S_10x_550, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_bt_2_921600 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S_10x_650, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_bt_2_921600 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S_10x_850, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_bt_2_921600 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_4S_10x_550, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_bt_4_921600 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_4S_10x_650, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_bt_4_921600 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_4S_10x_850, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_bt_4_921600 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S_20x_550, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_1_921600 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S_20x_650, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_1_921600 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S_20x_850, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_1_921600 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S_20x_550, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_2_921600 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S_20x_650, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_2_921600 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S_20x_850, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_2_921600 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_4S_20x_550, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_4_921600 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_4S_20x_650, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_4_921600 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_4S_20x_850, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_4_921600 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_8S_20x_550, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_8_921600 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_8S_20x_650, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_8_921600 }, - { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_8S_20x_850, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_8_921600 }, - - /* - * Computone devices submitted by Doug McNash dmcnash@computone.com - */ - { PCI_VENDOR_ID_COMPUTONE, PCI_DEVICE_ID_COMPUTONE_PG, - PCI_SUBVENDOR_ID_COMPUTONE, PCI_SUBDEVICE_ID_COMPUTONE_PG4, - 0, 0, pbn_computone_4 }, - { PCI_VENDOR_ID_COMPUTONE, PCI_DEVICE_ID_COMPUTONE_PG, - PCI_SUBVENDOR_ID_COMPUTONE, PCI_SUBDEVICE_ID_COMPUTONE_PG8, - 0, 0, pbn_computone_8 }, - { PCI_VENDOR_ID_COMPUTONE, PCI_DEVICE_ID_COMPUTONE_PG, - PCI_SUBVENDOR_ID_COMPUTONE, PCI_SUBDEVICE_ID_COMPUTONE_PG6, - 0, 0, pbn_computone_6 }, - - { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI95N, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_oxsemi }, - { PCI_VENDOR_ID_TIMEDIA, PCI_DEVICE_ID_TIMEDIA_1889, - PCI_VENDOR_ID_TIMEDIA, PCI_ANY_ID, 0, 0, - pbn_b0_bt_1_921600 }, - - /* - * AFAVLAB serial card, from Harald Welte <laforge@gnumonks.org> - */ - { PCI_VENDOR_ID_AFAVLAB, PCI_DEVICE_ID_AFAVLAB_P028, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_8_115200 }, - { PCI_VENDOR_ID_AFAVLAB, PCI_DEVICE_ID_AFAVLAB_P030, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_8_115200 }, - - { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DSERIAL, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_2_115200 }, - { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_QUATRO_A, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_2_115200 }, - { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_QUATRO_B, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_2_115200 }, - { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_QUATTRO_A, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_2_115200 }, - { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_QUATTRO_B, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_2_115200 }, - { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_OCTO_A, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_4_460800 }, - { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_OCTO_B, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_4_460800 }, - { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_PORT_PLUS, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_2_460800 }, - { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_QUAD_A, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_2_460800 }, - { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_QUAD_B, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_2_460800 }, - { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_SSERIAL, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_1_115200 }, - { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_PORT_650, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_bt_1_460800 }, - - /* - * Korenix Jetcard F0/F1 cards (JC1204, JC1208, JC1404, JC1408). - * Cards are identified by their subsystem vendor IDs, which - * (in hex) match the model number. - * - * Note that JC140x are RS422/485 cards which require ox950 - * ACR = 0x10, and as such are not currently fully supported. - */ - { PCI_VENDOR_ID_KORENIX, PCI_DEVICE_ID_KORENIX_JETCARDF0, - 0x1204, 0x0004, 0, 0, - pbn_b0_4_921600 }, - { PCI_VENDOR_ID_KORENIX, PCI_DEVICE_ID_KORENIX_JETCARDF0, - 0x1208, 0x0004, 0, 0, - pbn_b0_4_921600 }, -/* { PCI_VENDOR_ID_KORENIX, PCI_DEVICE_ID_KORENIX_JETCARDF0, - 0x1402, 0x0002, 0, 0, - pbn_b0_2_921600 }, */ -/* { PCI_VENDOR_ID_KORENIX, PCI_DEVICE_ID_KORENIX_JETCARDF0, - 0x1404, 0x0004, 0, 0, - pbn_b0_4_921600 }, */ - { PCI_VENDOR_ID_KORENIX, PCI_DEVICE_ID_KORENIX_JETCARDF1, - 0x1208, 0x0004, 0, 0, - pbn_b0_4_921600 }, - - { PCI_VENDOR_ID_KORENIX, PCI_DEVICE_ID_KORENIX_JETCARDF2, - 0x1204, 0x0004, 0, 0, - pbn_b0_4_921600 }, - { PCI_VENDOR_ID_KORENIX, PCI_DEVICE_ID_KORENIX_JETCARDF2, - 0x1208, 0x0004, 0, 0, - pbn_b0_4_921600 }, - { PCI_VENDOR_ID_KORENIX, PCI_DEVICE_ID_KORENIX_JETCARDF3, - 0x1208, 0x0004, 0, 0, - pbn_b0_4_921600 }, - /* - * Dell Remote Access Card 4 - Tim_T_Murphy@Dell.com - */ - { PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_RAC4, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_1_1382400 }, - - /* - * Dell Remote Access Card III - Tim_T_Murphy@Dell.com - */ - { PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_RACIII, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_1_1382400 }, - - /* - * RAStel 2 port modem, gerg@moreton.com.au - */ - { PCI_VENDOR_ID_MORETON, PCI_DEVICE_ID_RASTEL_2PORT, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_bt_2_115200 }, - - /* - * EKF addition for i960 Boards form EKF with serial port - */ - { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_80960_RP, - 0xE4BF, PCI_ANY_ID, 0, 0, - pbn_intel_i960 }, - - /* - * Xircom Cardbus/Ethernet combos - */ - { PCI_VENDOR_ID_XIRCOM, PCI_DEVICE_ID_XIRCOM_X3201_MDM, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_1_115200 }, - /* - * Xircom RBM56G cardbus modem - Dirk Arnold (temp entry) - */ - { PCI_VENDOR_ID_XIRCOM, PCI_DEVICE_ID_XIRCOM_RBM56G, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_1_115200 }, - - /* - * Untested PCI modems, sent in from various folks... - */ - - /* - * Elsa Model 56K PCI Modem, from Andreas Rath <arh@01019freenet.de> - */ - { PCI_VENDOR_ID_ROCKWELL, 0x1004, - 0x1048, 0x1500, 0, 0, - pbn_b1_1_115200 }, - - { PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, - 0xFF00, 0, 0, 0, - pbn_sgi_ioc3 }, - - /* - * HP Diva card - */ - { PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_DIVA, - PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_DIVA_RMP3, 0, 0, - pbn_b1_1_115200 }, - { PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_DIVA, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_5_115200 }, - { PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_DIVA_AUX, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b2_1_115200 }, - - { PCI_VENDOR_ID_DCI, PCI_DEVICE_ID_DCI_PCCOM2, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b3_2_115200 }, - { PCI_VENDOR_ID_DCI, PCI_DEVICE_ID_DCI_PCCOM4, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b3_4_115200 }, - { PCI_VENDOR_ID_DCI, PCI_DEVICE_ID_DCI_PCCOM8, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b3_8_115200 }, - - /* - * Exar Corp. XR17C15[248] Dual/Quad/Octal UART - */ - { PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17C152, - PCI_ANY_ID, PCI_ANY_ID, - 0, - 0, pbn_exar_XR17C152 }, - { PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17C154, - PCI_ANY_ID, PCI_ANY_ID, - 0, - 0, pbn_exar_XR17C154 }, - { PCI_VENDOR_ID_EXAR, PCI_DEVICE_ID_EXAR_XR17C158, - PCI_ANY_ID, PCI_ANY_ID, - 0, - 0, pbn_exar_XR17C158 }, - - /* - * Topic TP560 Data/Fax/Voice 56k modem (reported by Evan Clarke) - */ - { PCI_VENDOR_ID_TOPIC, PCI_DEVICE_ID_TOPIC_TP560, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b0_1_115200 }, - /* - * ITE - */ - { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872, - PCI_ANY_ID, PCI_ANY_ID, - 0, 0, - pbn_b1_bt_1_115200 }, - - /* - * IntaShield IS-200 - */ - { PCI_VENDOR_ID_INTASHIELD, PCI_DEVICE_ID_INTASHIELD_IS200, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, /* 135a.0811 */ - pbn_b2_2_115200 }, - /* - * IntaShield IS-400 - */ - { PCI_VENDOR_ID_INTASHIELD, PCI_DEVICE_ID_INTASHIELD_IS400, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, /* 135a.0dc0 */ - pbn_b2_4_115200 }, - /* - * Perle PCI-RAS cards - */ - { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9030, - PCI_SUBVENDOR_ID_PERLE, PCI_SUBDEVICE_ID_PCI_RAS4, - 0, 0, pbn_b2_4_921600 }, - { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9030, - PCI_SUBVENDOR_ID_PERLE, PCI_SUBDEVICE_ID_PCI_RAS8, - 0, 0, pbn_b2_8_921600 }, - - /* - * Mainpine series cards: Fairly standard layout but fools - * parts of the autodetect in some cases and uses otherwise - * unmatched communications subclasses in the PCI Express case - */ - - { /* RockForceDUO */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x0200, - 0, 0, pbn_b0_2_115200 }, - { /* RockForceQUATRO */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x0300, - 0, 0, pbn_b0_4_115200 }, - { /* RockForceDUO+ */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x0400, - 0, 0, pbn_b0_2_115200 }, - { /* RockForceQUATRO+ */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x0500, - 0, 0, pbn_b0_4_115200 }, - { /* RockForce+ */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x0600, - 0, 0, pbn_b0_2_115200 }, - { /* RockForce+ */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x0700, - 0, 0, pbn_b0_4_115200 }, - { /* RockForceOCTO+ */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x0800, - 0, 0, pbn_b0_8_115200 }, - { /* RockForceDUO+ */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x0C00, - 0, 0, pbn_b0_2_115200 }, - { /* RockForceQUARTRO+ */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x0D00, - 0, 0, pbn_b0_4_115200 }, - { /* RockForceOCTO+ */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x1D00, - 0, 0, pbn_b0_8_115200 }, - { /* RockForceD1 */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x2000, - 0, 0, pbn_b0_1_115200 }, - { /* RockForceF1 */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x2100, - 0, 0, pbn_b0_1_115200 }, - { /* RockForceD2 */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x2200, - 0, 0, pbn_b0_2_115200 }, - { /* RockForceF2 */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x2300, - 0, 0, pbn_b0_2_115200 }, - { /* RockForceD4 */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x2400, - 0, 0, pbn_b0_4_115200 }, - { /* RockForceF4 */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x2500, - 0, 0, pbn_b0_4_115200 }, - { /* RockForceD8 */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x2600, - 0, 0, pbn_b0_8_115200 }, - { /* RockForceF8 */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x2700, - 0, 0, pbn_b0_8_115200 }, - { /* IQ Express D1 */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x3000, - 0, 0, pbn_b0_1_115200 }, - { /* IQ Express F1 */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x3100, - 0, 0, pbn_b0_1_115200 }, - { /* IQ Express D2 */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x3200, - 0, 0, pbn_b0_2_115200 }, - { /* IQ Express F2 */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x3300, - 0, 0, pbn_b0_2_115200 }, - { /* IQ Express D4 */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x3400, - 0, 0, pbn_b0_4_115200 }, - { /* IQ Express F4 */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x3500, - 0, 0, pbn_b0_4_115200 }, - { /* IQ Express D8 */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x3C00, - 0, 0, pbn_b0_8_115200 }, - { /* IQ Express F8 */ - PCI_VENDOR_ID_MAINPINE, PCI_DEVICE_ID_MAINPINE_PBRIDGE, - PCI_VENDOR_ID_MAINPINE, 0x3D00, - 0, 0, pbn_b0_8_115200 }, - - - /* - * PA Semi PA6T-1682M on-chip UART - */ - { PCI_VENDOR_ID_PASEMI, 0xa004, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_pasemi_1682M }, - - /* - * National Instruments - */ - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI23216, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_16_115200 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI2328, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_8_115200 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI2324, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_bt_4_115200 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI2322, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_bt_2_115200 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI2324I, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_bt_4_115200 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI2322I, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_bt_2_115200 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8420_23216, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_16_115200 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8420_2328, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_8_115200 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8420_2324, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_bt_4_115200 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8420_2322, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_bt_2_115200 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8422_2324, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_bt_4_115200 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8422_2322, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_b1_bt_2_115200 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8430_2322, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_ni8430_2 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI8430_2322, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_ni8430_2 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8430_2324, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_ni8430_4 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI8430_2324, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_ni8430_4 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8430_2328, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_ni8430_8 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI8430_2328, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_ni8430_8 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8430_23216, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_ni8430_16 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI8430_23216, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_ni8430_16 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8432_2322, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_ni8430_2 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI8432_2322, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_ni8430_2 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PXI8432_2324, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_ni8430_4 }, - { PCI_VENDOR_ID_NI, PCI_DEVICE_ID_NI_PCI8432_2324, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_ni8430_4 }, - - /* - * ADDI-DATA GmbH communication cards <info@addi-data.com> - */ - { PCI_VENDOR_ID_ADDIDATA, - PCI_DEVICE_ID_ADDIDATA_APCI7500, - PCI_ANY_ID, - PCI_ANY_ID, - 0, - 0, - pbn_b0_4_115200 }, - - { PCI_VENDOR_ID_ADDIDATA, - PCI_DEVICE_ID_ADDIDATA_APCI7420, - PCI_ANY_ID, - PCI_ANY_ID, - 0, - 0, - pbn_b0_2_115200 }, - - { PCI_VENDOR_ID_ADDIDATA, - PCI_DEVICE_ID_ADDIDATA_APCI7300, - PCI_ANY_ID, - PCI_ANY_ID, - 0, - 0, - pbn_b0_1_115200 }, - - { PCI_VENDOR_ID_ADDIDATA_OLD, - PCI_DEVICE_ID_ADDIDATA_APCI7800, - PCI_ANY_ID, - PCI_ANY_ID, - 0, - 0, - pbn_b1_8_115200 }, - - { PCI_VENDOR_ID_ADDIDATA, - PCI_DEVICE_ID_ADDIDATA_APCI7500_2, - PCI_ANY_ID, - PCI_ANY_ID, - 0, - 0, - pbn_b0_4_115200 }, - - { PCI_VENDOR_ID_ADDIDATA, - PCI_DEVICE_ID_ADDIDATA_APCI7420_2, - PCI_ANY_ID, - PCI_ANY_ID, - 0, - 0, - pbn_b0_2_115200 }, - - { PCI_VENDOR_ID_ADDIDATA, - PCI_DEVICE_ID_ADDIDATA_APCI7300_2, - PCI_ANY_ID, - PCI_ANY_ID, - 0, - 0, - pbn_b0_1_115200 }, - - { PCI_VENDOR_ID_ADDIDATA, - PCI_DEVICE_ID_ADDIDATA_APCI7500_3, - PCI_ANY_ID, - PCI_ANY_ID, - 0, - 0, - pbn_b0_4_115200 }, - - { PCI_VENDOR_ID_ADDIDATA, - PCI_DEVICE_ID_ADDIDATA_APCI7420_3, - PCI_ANY_ID, - PCI_ANY_ID, - 0, - 0, - pbn_b0_2_115200 }, - - { PCI_VENDOR_ID_ADDIDATA, - PCI_DEVICE_ID_ADDIDATA_APCI7300_3, - PCI_ANY_ID, - PCI_ANY_ID, - 0, - 0, - pbn_b0_1_115200 }, - - { PCI_VENDOR_ID_ADDIDATA, - PCI_DEVICE_ID_ADDIDATA_APCI7800_3, - PCI_ANY_ID, - PCI_ANY_ID, - 0, - 0, - pbn_b0_8_115200 }, - - { PCI_VENDOR_ID_ADDIDATA, - PCI_DEVICE_ID_ADDIDATA_APCIe7500, - PCI_ANY_ID, - PCI_ANY_ID, - 0, - 0, - pbn_ADDIDATA_PCIe_4_3906250 }, - - { PCI_VENDOR_ID_ADDIDATA, - PCI_DEVICE_ID_ADDIDATA_APCIe7420, - PCI_ANY_ID, - PCI_ANY_ID, - 0, - 0, - pbn_ADDIDATA_PCIe_2_3906250 }, - - { PCI_VENDOR_ID_ADDIDATA, - PCI_DEVICE_ID_ADDIDATA_APCIe7300, - PCI_ANY_ID, - PCI_ANY_ID, - 0, - 0, - pbn_ADDIDATA_PCIe_1_3906250 }, - - { PCI_VENDOR_ID_ADDIDATA, - PCI_DEVICE_ID_ADDIDATA_APCIe7800, - PCI_ANY_ID, - PCI_ANY_ID, - 0, - 0, - pbn_ADDIDATA_PCIe_8_3906250 }, - - { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9835, - PCI_VENDOR_ID_IBM, 0x0299, - 0, 0, pbn_b0_bt_2_115200 }, - - { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9901, - 0xA000, 0x1000, - 0, 0, pbn_b0_1_115200 }, - - /* - * Best Connectivity PCI Multi I/O cards - */ - - { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865, - 0xA000, 0x1000, - 0, 0, pbn_b0_1_115200 }, - - { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865, - 0xA000, 0x3004, - 0, 0, pbn_b0_bt_4_115200 }, - /* Intel CE4100 */ - { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CE4100_UART, - PCI_ANY_ID, PCI_ANY_ID, 0, 0, - pbn_ce4100_1_115200 }, - - - /* - * These entries match devices with class COMMUNICATION_SERIAL, - * COMMUNICATION_MODEM or COMMUNICATION_MULTISERIAL - */ - { PCI_ANY_ID, PCI_ANY_ID, - PCI_ANY_ID, PCI_ANY_ID, - PCI_CLASS_COMMUNICATION_SERIAL << 8, - 0xffff00, pbn_default }, - { PCI_ANY_ID, PCI_ANY_ID, - PCI_ANY_ID, PCI_ANY_ID, - PCI_CLASS_COMMUNICATION_MODEM << 8, - 0xffff00, pbn_default }, - { PCI_ANY_ID, PCI_ANY_ID, - PCI_ANY_ID, PCI_ANY_ID, - PCI_CLASS_COMMUNICATION_MULTISERIAL << 8, - 0xffff00, pbn_default }, - { 0, } -}; - -static struct pci_driver serial_pci_driver = { - .name = "serial", - .probe = pciserial_init_one, - .remove = __devexit_p(pciserial_remove_one), -#ifdef CONFIG_PM - .suspend = pciserial_suspend_one, - .resume = pciserial_resume_one, -#endif - .id_table = serial_pci_tbl, -}; - -static int __init serial8250_pci_init(void) -{ - return pci_register_driver(&serial_pci_driver); -} - -static void __exit serial8250_pci_exit(void) -{ - pci_unregister_driver(&serial_pci_driver); -} - -module_init(serial8250_pci_init); -module_exit(serial8250_pci_exit); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Generic 8250/16x50 PCI serial probe module"); -MODULE_DEVICE_TABLE(pci, serial_pci_tbl); diff --git a/drivers/serial/8250_pnp.c b/drivers/serial/8250_pnp.c deleted file mode 100644 index 4822cb50cd0f..000000000000 --- a/drivers/serial/8250_pnp.c +++ /dev/null @@ -1,523 +0,0 @@ -/* - * linux/drivers/char/8250_pnp.c - * - * Probe module for 8250/16550-type ISAPNP serial ports. - * - * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. - * - * Copyright (C) 2001 Russell King, All Rights Reserved. - * - * Ported to the Linux PnP Layer - (C) Adam Belay. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License. - */ -#include <linux/module.h> -#include <linux/init.h> -#include <linux/pci.h> -#include <linux/pnp.h> -#include <linux/string.h> -#include <linux/kernel.h> -#include <linux/serial_core.h> -#include <linux/bitops.h> - -#include <asm/byteorder.h> - -#include "8250.h" - -#define UNKNOWN_DEV 0x3000 - - -static const struct pnp_device_id pnp_dev_table[] = { - /* Archtek America Corp. */ - /* Archtek SmartLink Modem 3334BT Plug & Play */ - { "AAC000F", 0 }, - /* Anchor Datacomm BV */ - /* SXPro 144 External Data Fax Modem Plug & Play */ - { "ADC0001", 0 }, - /* SXPro 288 External Data Fax Modem Plug & Play */ - { "ADC0002", 0 }, - /* PROLiNK 1456VH ISA PnP K56flex Fax Modem */ - { "AEI0250", 0 }, - /* Actiontec ISA PNP 56K X2 Fax Modem */ - { "AEI1240", 0 }, - /* Rockwell 56K ACF II Fax+Data+Voice Modem */ - { "AKY1021", 0 /*SPCI_FL_NO_SHIRQ*/ }, - /* AZT3005 PnP SOUND DEVICE */ - { "AZT4001", 0 }, - /* Best Data Products Inc. Smart One 336F PnP Modem */ - { "BDP3336", 0 }, - /* Boca Research */ - /* Boca Complete Ofc Communicator 14.4 Data-FAX */ - { "BRI0A49", 0 }, - /* Boca Research 33,600 ACF Modem */ - { "BRI1400", 0 }, - /* Boca 33.6 Kbps Internal FD34FSVD */ - { "BRI3400", 0 }, - /* Boca 33.6 Kbps Internal FD34FSVD */ - { "BRI0A49", 0 }, - /* Best Data Products Inc. Smart One 336F PnP Modem */ - { "BDP3336", 0 }, - /* Computer Peripherals Inc */ - /* EuroViVa CommCenter-33.6 SP PnP */ - { "CPI4050", 0 }, - /* Creative Labs */ - /* Creative Labs Phone Blaster 28.8 DSVD PnP Voice */ - { "CTL3001", 0 }, - /* Creative Labs Modem Blaster 28.8 DSVD PnP Voice */ - { "CTL3011", 0 }, - /* Davicom ISA 33.6K Modem */ - { "DAV0336", 0 }, - /* Creative */ - /* Creative Modem Blaster Flash56 DI5601-1 */ - { "DMB1032", 0 }, - /* Creative Modem Blaster V.90 DI5660 */ - { "DMB2001", 0 }, - /* E-Tech */ - /* E-Tech CyberBULLET PC56RVP */ - { "ETT0002", 0 }, - /* FUJITSU */ - /* Fujitsu 33600 PnP-I2 R Plug & Play */ - { "FUJ0202", 0 }, - /* Fujitsu FMV-FX431 Plug & Play */ - { "FUJ0205", 0 }, - /* Fujitsu 33600 PnP-I4 R Plug & Play */ - { "FUJ0206", 0 }, - /* Fujitsu Fax Voice 33600 PNP-I5 R Plug & Play */ - { "FUJ0209", 0 }, - /* Archtek America Corp. */ - /* Archtek SmartLink Modem 3334BT Plug & Play */ - { "GVC000F", 0 }, - /* Archtek SmartLink Modem 3334BRV 33.6K Data Fax Voice */ - { "GVC0303", 0 }, - /* Hayes */ - /* Hayes Optima 288 V.34-V.FC + FAX + Voice Plug & Play */ - { "HAY0001", 0 }, - /* Hayes Optima 336 V.34 + FAX + Voice PnP */ - { "HAY000C", 0 }, - /* Hayes Optima 336B V.34 + FAX + Voice PnP */ - { "HAY000D", 0 }, - /* Hayes Accura 56K Ext Fax Modem PnP */ - { "HAY5670", 0 }, - /* Hayes Accura 56K Ext Fax Modem PnP */ - { "HAY5674", 0 }, - /* Hayes Accura 56K Fax Modem PnP */ - { "HAY5675", 0 }, - /* Hayes 288, V.34 + FAX */ - { "HAYF000", 0 }, - /* Hayes Optima 288 V.34 + FAX + Voice, Plug & Play */ - { "HAYF001", 0 }, - /* IBM */ - /* IBM Thinkpad 701 Internal Modem Voice */ - { "IBM0033", 0 }, - /* Intertex */ - /* Intertex 28k8 33k6 Voice EXT PnP */ - { "IXDC801", 0 }, - /* Intertex 33k6 56k Voice EXT PnP */ - { "IXDC901", 0 }, - /* Intertex 28k8 33k6 Voice SP EXT PnP */ - { "IXDD801", 0 }, - /* Intertex 33k6 56k Voice SP EXT PnP */ - { "IXDD901", 0 }, - /* Intertex 28k8 33k6 Voice SP INT PnP */ - { "IXDF401", 0 }, - /* Intertex 28k8 33k6 Voice SP EXT PnP */ - { "IXDF801", 0 }, - /* Intertex 33k6 56k Voice SP EXT PnP */ - { "IXDF901", 0 }, - /* Kortex International */ - /* KORTEX 28800 Externe PnP */ - { "KOR4522", 0 }, - /* KXPro 33.6 Vocal ASVD PnP */ - { "KORF661", 0 }, - /* Lasat */ - /* LASAT Internet 33600 PnP */ - { "LAS4040", 0 }, - /* Lasat Safire 560 PnP */ - { "LAS4540", 0 }, - /* Lasat Safire 336 PnP */ - { "LAS5440", 0 }, - /* Microcom, Inc. */ - /* Microcom TravelPorte FAST V.34 Plug & Play */ - { "MNP0281", 0 }, - /* Microcom DeskPorte V.34 FAST or FAST+ Plug & Play */ - { "MNP0336", 0 }, - /* Microcom DeskPorte FAST EP 28.8 Plug & Play */ - { "MNP0339", 0 }, - /* Microcom DeskPorte 28.8P Plug & Play */ - { "MNP0342", 0 }, - /* Microcom DeskPorte FAST ES 28.8 Plug & Play */ - { "MNP0500", 0 }, - /* Microcom DeskPorte FAST ES 28.8 Plug & Play */ - { "MNP0501", 0 }, - /* Microcom DeskPorte 28.8S Internal Plug & Play */ - { "MNP0502", 0 }, - /* Motorola */ - /* Motorola BitSURFR Plug & Play */ - { "MOT1105", 0 }, - /* Motorola TA210 Plug & Play */ - { "MOT1111", 0 }, - /* Motorola HMTA 200 (ISDN) Plug & Play */ - { "MOT1114", 0 }, - /* Motorola BitSURFR Plug & Play */ - { "MOT1115", 0 }, - /* Motorola Lifestyle 28.8 Internal */ - { "MOT1190", 0 }, - /* Motorola V.3400 Plug & Play */ - { "MOT1501", 0 }, - /* Motorola Lifestyle 28.8 V.34 Plug & Play */ - { "MOT1502", 0 }, - /* Motorola Power 28.8 V.34 Plug & Play */ - { "MOT1505", 0 }, - /* Motorola ModemSURFR External 28.8 Plug & Play */ - { "MOT1509", 0 }, - /* Motorola Premier 33.6 Desktop Plug & Play */ - { "MOT150A", 0 }, - /* Motorola VoiceSURFR 56K External PnP */ - { "MOT150F", 0 }, - /* Motorola ModemSURFR 56K External PnP */ - { "MOT1510", 0 }, - /* Motorola ModemSURFR 56K Internal PnP */ - { "MOT1550", 0 }, - /* Motorola ModemSURFR Internal 28.8 Plug & Play */ - { "MOT1560", 0 }, - /* Motorola Premier 33.6 Internal Plug & Play */ - { "MOT1580", 0 }, - /* Motorola OnlineSURFR 28.8 Internal Plug & Play */ - { "MOT15B0", 0 }, - /* Motorola VoiceSURFR 56K Internal PnP */ - { "MOT15F0", 0 }, - /* Com 1 */ - /* Deskline K56 Phone System PnP */ - { "MVX00A1", 0 }, - /* PC Rider K56 Phone System PnP */ - { "MVX00F2", 0 }, - /* NEC 98NOTE SPEAKER PHONE FAX MODEM(33600bps) */ - { "nEC8241", 0 }, - /* Pace 56 Voice Internal Plug & Play Modem */ - { "PMC2430", 0 }, - /* Generic */ - /* Generic standard PC COM port */ - { "PNP0500", 0 }, - /* Generic 16550A-compatible COM port */ - { "PNP0501", 0 }, - /* Compaq 14400 Modem */ - { "PNPC000", 0 }, - /* Compaq 2400/9600 Modem */ - { "PNPC001", 0 }, - /* Dial-Up Networking Serial Cable between 2 PCs */ - { "PNPC031", 0 }, - /* Dial-Up Networking Parallel Cable between 2 PCs */ - { "PNPC032", 0 }, - /* Standard 9600 bps Modem */ - { "PNPC100", 0 }, - /* Standard 14400 bps Modem */ - { "PNPC101", 0 }, - /* Standard 28800 bps Modem*/ - { "PNPC102", 0 }, - /* Standard Modem*/ - { "PNPC103", 0 }, - /* Standard 9600 bps Modem*/ - { "PNPC104", 0 }, - /* Standard 14400 bps Modem*/ - { "PNPC105", 0 }, - /* Standard 28800 bps Modem*/ - { "PNPC106", 0 }, - /* Standard Modem */ - { "PNPC107", 0 }, - /* Standard 9600 bps Modem */ - { "PNPC108", 0 }, - /* Standard 14400 bps Modem */ - { "PNPC109", 0 }, - /* Standard 28800 bps Modem */ - { "PNPC10A", 0 }, - /* Standard Modem */ - { "PNPC10B", 0 }, - /* Standard 9600 bps Modem */ - { "PNPC10C", 0 }, - /* Standard 14400 bps Modem */ - { "PNPC10D", 0 }, - /* Standard 28800 bps Modem */ - { "PNPC10E", 0 }, - /* Standard Modem */ - { "PNPC10F", 0 }, - /* Standard PCMCIA Card Modem */ - { "PNP2000", 0 }, - /* Rockwell */ - /* Modular Technology */ - /* Rockwell 33.6 DPF Internal PnP */ - /* Modular Technology 33.6 Internal PnP */ - { "ROK0030", 0 }, - /* Kortex International */ - /* KORTEX 14400 Externe PnP */ - { "ROK0100", 0 }, - /* Rockwell 28.8 */ - { "ROK4120", 0 }, - /* Viking Components, Inc */ - /* Viking 28.8 INTERNAL Fax+Data+Voice PnP */ - { "ROK4920", 0 }, - /* Rockwell */ - /* British Telecom */ - /* Modular Technology */ - /* Rockwell 33.6 DPF External PnP */ - /* BT Prologue 33.6 External PnP */ - /* Modular Technology 33.6 External PnP */ - { "RSS00A0", 0 }, - /* Viking 56K FAX INT */ - { "RSS0262", 0 }, - /* K56 par,VV,Voice,Speakphone,AudioSpan,PnP */ - { "RSS0250", 0 }, - /* SupraExpress 28.8 Data/Fax PnP modem */ - { "SUP1310", 0 }, - /* SupraExpress 336i PnP Voice Modem */ - { "SUP1381", 0 }, - /* SupraExpress 33.6 Data/Fax PnP modem */ - { "SUP1421", 0 }, - /* SupraExpress 33.6 Data/Fax PnP modem */ - { "SUP1590", 0 }, - /* SupraExpress 336i Sp ASVD */ - { "SUP1620", 0 }, - /* SupraExpress 33.6 Data/Fax PnP modem */ - { "SUP1760", 0 }, - /* SupraExpress 56i Sp Intl */ - { "SUP2171", 0 }, - /* Phoebe Micro */ - /* Phoebe Micro 33.6 Data Fax 1433VQH Plug & Play */ - { "TEX0011", 0 }, - /* Archtek America Corp. */ - /* Archtek SmartLink Modem 3334BT Plug & Play */ - { "UAC000F", 0 }, - /* 3Com Corp. */ - /* Gateway Telepath IIvi 33.6 */ - { "USR0000", 0 }, - /* U.S. Robotics Sporster 33.6K Fax INT PnP */ - { "USR0002", 0 }, - /* Sportster Vi 14.4 PnP FAX Voicemail */ - { "USR0004", 0 }, - /* U.S. Robotics 33.6K Voice INT PnP */ - { "USR0006", 0 }, - /* U.S. Robotics 33.6K Voice EXT PnP */ - { "USR0007", 0 }, - /* U.S. Robotics Courier V.Everything INT PnP */ - { "USR0009", 0 }, - /* U.S. Robotics 33.6K Voice INT PnP */ - { "USR2002", 0 }, - /* U.S. Robotics 56K Voice INT PnP */ - { "USR2070", 0 }, - /* U.S. Robotics 56K Voice EXT PnP */ - { "USR2080", 0 }, - /* U.S. Robotics 56K FAX INT */ - { "USR3031", 0 }, - /* U.S. Robotics 56K FAX INT */ - { "USR3050", 0 }, - /* U.S. Robotics 56K Voice INT PnP */ - { "USR3070", 0 }, - /* U.S. Robotics 56K Voice EXT PnP */ - { "USR3080", 0 }, - /* U.S. Robotics 56K Voice INT PnP */ - { "USR3090", 0 }, - /* U.S. Robotics 56K Message */ - { "USR9100", 0 }, - /* U.S. Robotics 56K FAX EXT PnP*/ - { "USR9160", 0 }, - /* U.S. Robotics 56K FAX INT PnP*/ - { "USR9170", 0 }, - /* U.S. Robotics 56K Voice EXT PnP*/ - { "USR9180", 0 }, - /* U.S. Robotics 56K Voice INT PnP*/ - { "USR9190", 0 }, - /* Wacom tablets */ - { "WACFXXX", 0 }, - /* Compaq touchscreen */ - { "FPI2002", 0 }, - /* Fujitsu Stylistic touchscreens */ - { "FUJ02B2", 0 }, - { "FUJ02B3", 0 }, - /* Fujitsu Stylistic LT touchscreens */ - { "FUJ02B4", 0 }, - /* Passive Fujitsu Stylistic touchscreens */ - { "FUJ02B6", 0 }, - { "FUJ02B7", 0 }, - { "FUJ02B8", 0 }, - { "FUJ02B9", 0 }, - { "FUJ02BC", 0 }, - /* Fujitsu Wacom Tablet PC device */ - { "FUJ02E5", 0 }, - /* Fujitsu P-series tablet PC device */ - { "FUJ02E6", 0 }, - /* Fujitsu Wacom 2FGT Tablet PC device */ - { "FUJ02E7", 0 }, - /* Fujitsu Wacom 1FGT Tablet PC device */ - { "FUJ02E9", 0 }, - /* - * LG C1 EXPRESS DUAL (C1-PB11A3) touch screen (actually a FUJ02E6 in - * disguise) - */ - { "LTS0001", 0 }, - /* Rockwell's (PORALiNK) 33600 INT PNP */ - { "WCI0003", 0 }, - /* Unknown PnP modems */ - { "PNPCXXX", UNKNOWN_DEV }, - /* More unknown PnP modems */ - { "PNPDXXX", UNKNOWN_DEV }, - { "", 0 } -}; - -MODULE_DEVICE_TABLE(pnp, pnp_dev_table); - -static char *modem_names[] __devinitdata = { - "MODEM", "Modem", "modem", "FAX", "Fax", "fax", - "56K", "56k", "K56", "33.6", "28.8", "14.4", - "33,600", "28,800", "14,400", "33.600", "28.800", "14.400", - "33600", "28800", "14400", "V.90", "V.34", "V.32", NULL -}; - -static int __devinit check_name(char *name) -{ - char **tmp; - - for (tmp = modem_names; *tmp; tmp++) - if (strstr(name, *tmp)) - return 1; - - return 0; -} - -static int __devinit check_resources(struct pnp_dev *dev) -{ - resource_size_t base[] = {0x2f8, 0x3f8, 0x2e8, 0x3e8}; - int i; - - for (i = 0; i < ARRAY_SIZE(base); i++) { - if (pnp_possible_config(dev, IORESOURCE_IO, base[i], 8)) - return 1; - } - - return 0; -} - -/* - * Given a complete unknown PnP device, try to use some heuristics to - * detect modems. Currently use such heuristic set: - * - dev->name or dev->bus->name must contain "modem" substring; - * - device must have only one IO region (8 byte long) with base address - * 0x2e8, 0x3e8, 0x2f8 or 0x3f8. - * - * Such detection looks very ugly, but can detect at least some of numerous - * PnP modems, alternatively we must hardcode all modems in pnp_devices[] - * table. - */ -static int __devinit serial_pnp_guess_board(struct pnp_dev *dev, int *flags) -{ - if (!(check_name(pnp_dev_name(dev)) || - (dev->card && check_name(dev->card->name)))) - return -ENODEV; - - if (check_resources(dev)) - return 0; - - return -ENODEV; -} - -static int __devinit -serial_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id) -{ - struct uart_port port; - int ret, line, flags = dev_id->driver_data; - - if (flags & UNKNOWN_DEV) { - ret = serial_pnp_guess_board(dev, &flags); - if (ret < 0) - return ret; - } - - memset(&port, 0, sizeof(struct uart_port)); - if (pnp_irq_valid(dev, 0)) - port.irq = pnp_irq(dev, 0); - if (pnp_port_valid(dev, 0)) { - port.iobase = pnp_port_start(dev, 0); - port.iotype = UPIO_PORT; - } else if (pnp_mem_valid(dev, 0)) { - port.mapbase = pnp_mem_start(dev, 0); - port.iotype = UPIO_MEM; - port.flags = UPF_IOREMAP; - } else - return -ENODEV; - -#ifdef SERIAL_DEBUG_PNP - printk(KERN_DEBUG - "Setup PNP port: port %x, mem 0x%lx, irq %d, type %d\n", - port.iobase, port.mapbase, port.irq, port.iotype); -#endif - - port.flags |= UPF_SKIP_TEST | UPF_BOOT_AUTOCONF; - if (pnp_irq_flags(dev, 0) & IORESOURCE_IRQ_SHAREABLE) - port.flags |= UPF_SHARE_IRQ; - port.uartclk = 1843200; - port.dev = &dev->dev; - - line = serial8250_register_port(&port); - if (line < 0) - return -ENODEV; - - pnp_set_drvdata(dev, (void *)((long)line + 1)); - return 0; -} - -static void __devexit serial_pnp_remove(struct pnp_dev *dev) -{ - long line = (long)pnp_get_drvdata(dev); - if (line) - serial8250_unregister_port(line - 1); -} - -#ifdef CONFIG_PM -static int serial_pnp_suspend(struct pnp_dev *dev, pm_message_t state) -{ - long line = (long)pnp_get_drvdata(dev); - - if (!line) - return -ENODEV; - serial8250_suspend_port(line - 1); - return 0; -} - -static int serial_pnp_resume(struct pnp_dev *dev) -{ - long line = (long)pnp_get_drvdata(dev); - - if (!line) - return -ENODEV; - serial8250_resume_port(line - 1); - return 0; -} -#else -#define serial_pnp_suspend NULL -#define serial_pnp_resume NULL -#endif /* CONFIG_PM */ - -static struct pnp_driver serial_pnp_driver = { - .name = "serial", - .probe = serial_pnp_probe, - .remove = __devexit_p(serial_pnp_remove), - .suspend = serial_pnp_suspend, - .resume = serial_pnp_resume, - .id_table = pnp_dev_table, -}; - -static int __init serial8250_pnp_init(void) -{ - return pnp_register_driver(&serial_pnp_driver); -} - -static void __exit serial8250_pnp_exit(void) -{ - pnp_unregister_driver(&serial_pnp_driver); -} - -module_init(serial8250_pnp_init); -module_exit(serial8250_pnp_exit); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Generic 8250/16x50 PnP serial driver"); diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig deleted file mode 100644 index c1df7676a73d..000000000000 --- a/drivers/serial/Kconfig +++ /dev/null @@ -1,1598 +0,0 @@ -# -# Serial device configuration -# - -menu "Serial drivers" - depends on HAS_IOMEM - -# -# The new 8250/16550 serial drivers -config SERIAL_8250 - tristate "8250/16550 and compatible serial support" - select SERIAL_CORE - ---help--- - This selects whether you want to include the driver for the standard - serial ports. The standard answer is Y. People who might say N - here are those that are setting up dedicated Ethernet WWW/FTP - servers, or users that have one of the various bus mice instead of a - serial mouse and don't intend to use their machine's standard serial - port for anything. (Note that the Cyclades and Stallion multi - serial port drivers do not need this driver built in for them to - work.) - - To compile this driver as a module, choose M here: the - module will be called 8250. - [WARNING: Do not compile this driver as a module if you are using - non-standard serial ports, since the configuration information will - be lost when the driver is unloaded. This limitation may be lifted - in the future.] - - BTW1: If you have a mouseman serial mouse which is not recognized by - the X window system, try running gpm first. - - BTW2: If you intend to use a software modem (also called Winmodem) - under Linux, forget it. These modems are crippled and require - proprietary drivers which are only available under Windows. - - Most people will say Y or M here, so that they can use serial mice, - modems and similar devices connecting to the standard serial ports. - -config SERIAL_8250_CONSOLE - bool "Console on 8250/16550 and compatible serial port" - depends on SERIAL_8250=y - select SERIAL_CORE_CONSOLE - ---help--- - If you say Y here, it will be possible to use a serial port as the - system console (the system console is the device which receives all - kernel messages and warnings and which allows logins in single user - mode). This could be useful if some terminal or printer is connected - to that serial port. - - Even if you say Y here, the currently visible virtual console - (/dev/tty0) will still be used as the system console by default, but - you can alter that using a kernel command line option such as - "console=ttyS1". (Try "man bootparam" or see the documentation of - your boot loader (grub or lilo or loadlin) about how to pass options - to the kernel at boot time.) - - If you don't have a VGA card installed and you say Y here, the - kernel will automatically use the first serial line, /dev/ttyS0, as - system console. - - You can set that using a kernel command line option such as - "console=uart8250,io,0x3f8,9600n8" - "console=uart8250,mmio,0xff5e0000,115200n8". - and it will switch to normal serial console when the corresponding - port is ready. - "earlycon=uart8250,io,0x3f8,9600n8" - "earlycon=uart8250,mmio,0xff5e0000,115200n8". - it will not only setup early console. - - If unsure, say N. - -config FIX_EARLYCON_MEM - bool - depends on X86 - default y - -config SERIAL_8250_GSC - tristate - depends on SERIAL_8250 && GSC - default SERIAL_8250 - -config SERIAL_8250_PCI - tristate "8250/16550 PCI device support" if EMBEDDED - depends on SERIAL_8250 && PCI - default SERIAL_8250 - help - This builds standard PCI serial support. You may be able to - disable this feature if you only need legacy serial support. - Saves about 9K. - -config SERIAL_8250_PNP - tristate "8250/16550 PNP device support" if EMBEDDED - depends on SERIAL_8250 && PNP - default SERIAL_8250 - help - This builds standard PNP serial support. You may be able to - disable this feature if you only need legacy serial support. - -config SERIAL_8250_HP300 - tristate - depends on SERIAL_8250 && HP300 - default SERIAL_8250 - -config SERIAL_8250_CS - tristate "8250/16550 PCMCIA device support" - depends on PCMCIA && SERIAL_8250 - ---help--- - Say Y here to enable support for 16-bit PCMCIA serial devices, - including serial port cards, modems, and the modem functions of - multi-function Ethernet/modem cards. (PCMCIA- or PC-cards are - credit-card size devices often used with laptops.) - - To compile this driver as a module, choose M here: the - module will be called serial_cs. - - If unsure, say N. - -config SERIAL_8250_NR_UARTS - int "Maximum number of 8250/16550 serial ports" - depends on SERIAL_8250 - default "4" - help - Set this to the number of serial ports you want the driver - to support. This includes any ports discovered via ACPI or - PCI enumeration and any ports that may be added at run-time - via hot-plug, or any ISA multi-port serial cards. - -config SERIAL_8250_RUNTIME_UARTS - int "Number of 8250/16550 serial ports to register at runtime" - depends on SERIAL_8250 - range 0 SERIAL_8250_NR_UARTS - default "4" - help - Set this to the maximum number of serial ports you want - the kernel to register at boot time. This can be overridden - with the module parameter "nr_uarts", or boot-time parameter - 8250.nr_uarts - -config SERIAL_8250_EXTENDED - bool "Extended 8250/16550 serial driver options" - depends on SERIAL_8250 - help - If you wish to use any non-standard features of the standard "dumb" - driver, say Y here. This includes HUB6 support, shared serial - interrupts, special multiport support, support for more than the - four COM 1/2/3/4 boards, etc. - - Note that the answer to this question won't directly affect the - kernel: saying N will just cause the configurator to skip all - the questions about serial driver options. If unsure, say N. - -config SERIAL_8250_MANY_PORTS - bool "Support more than 4 legacy serial ports" - depends on SERIAL_8250_EXTENDED && !IA64 - help - Say Y here if you have dumb serial boards other than the four - standard COM 1/2/3/4 ports. This may happen if you have an AST - FourPort, Accent Async, Boca (read the Boca mini-HOWTO, available - from <http://www.tldp.org/docs.html#howto>), or other custom - serial port hardware which acts similar to standard serial port - hardware. If you only use the standard COM 1/2/3/4 ports, you can - say N here to save some memory. You can also say Y if you have an - "intelligent" multiport card such as Cyclades, Digiboards, etc. - -# -# Multi-port serial cards -# - -config SERIAL_8250_FOURPORT - tristate "Support Fourport cards" - depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS - help - Say Y here if you have an AST FourPort serial board. - - To compile this driver as a module, choose M here: the module - will be called 8250_fourport. - -config SERIAL_8250_ACCENT - tristate "Support Accent cards" - depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS - help - Say Y here if you have an Accent Async serial board. - - To compile this driver as a module, choose M here: the module - will be called 8250_accent. - -config SERIAL_8250_BOCA - tristate "Support Boca cards" - depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS - help - Say Y here if you have a Boca serial board. Please read the Boca - mini-HOWTO, available from <http://www.tldp.org/docs.html#howto> - - To compile this driver as a module, choose M here: the module - will be called 8250_boca. - -config SERIAL_8250_EXAR_ST16C554 - tristate "Support Exar ST16C554/554D Quad UART" - depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS - help - The Uplogix Envoy TU301 uses this Exar Quad UART. If you are - tinkering with your Envoy TU301, or have a machine with this UART, - say Y here. - - To compile this driver as a module, choose M here: the module - will be called 8250_exar_st16c554. - -config SERIAL_8250_HUB6 - tristate "Support Hub6 cards" - depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS - help - Say Y here if you have a HUB6 serial board. - - To compile this driver as a module, choose M here: the module - will be called 8250_hub6. - -config SERIAL_8250_SHARE_IRQ - bool "Support for sharing serial interrupts" - depends on SERIAL_8250_EXTENDED - help - Some serial boards have hardware support which allows multiple dumb - serial ports on the same board to share a single IRQ. To enable - support for this in the serial driver, say Y here. - -config SERIAL_8250_DETECT_IRQ - bool "Autodetect IRQ on standard ports (unsafe)" - depends on SERIAL_8250_EXTENDED - help - Say Y here if you want the kernel to try to guess which IRQ - to use for your serial port. - - This is considered unsafe; it is far better to configure the IRQ in - a boot script using the setserial command. - - If unsure, say N. - -config SERIAL_8250_RSA - bool "Support RSA serial ports" - depends on SERIAL_8250_EXTENDED - help - ::: To be written ::: - -config SERIAL_8250_MCA - tristate "Support 8250-type ports on MCA buses" - depends on SERIAL_8250 != n && MCA - help - Say Y here if you have a MCA serial ports. - - To compile this driver as a module, choose M here: the module - will be called 8250_mca. - -config SERIAL_8250_ACORN - tristate "Acorn expansion card serial port support" - depends on ARCH_ACORN && SERIAL_8250 - help - If you have an Atomwide Serial card or Serial Port card for an Acorn - system, say Y to this option. The driver can handle 1, 2, or 3 port - cards. If unsure, say N. - -config SERIAL_8250_RM9K - bool "Support for MIPS RM9xxx integrated serial port" - depends on SERIAL_8250 != n && SERIAL_RM9000 - select SERIAL_8250_SHARE_IRQ - help - Selecting this option will add support for the integrated serial - port hardware found on MIPS RM9122 and similar processors. - If unsure, say N. - -comment "Non-8250 serial port support" - -config SERIAL_AMBA_PL010 - tristate "ARM AMBA PL010 serial port support" - depends on ARM_AMBA && (BROKEN || !ARCH_VERSATILE) - select SERIAL_CORE - help - This selects the ARM(R) AMBA(R) PrimeCell PL010 UART. If you have - an Integrator/AP or Integrator/PP2 platform, or if you have a - Cirrus Logic EP93xx CPU, say Y or M here. - - If unsure, say N. - -config SERIAL_AMBA_PL010_CONSOLE - bool "Support for console on AMBA serial port" - depends on SERIAL_AMBA_PL010=y - select SERIAL_CORE_CONSOLE - ---help--- - Say Y here if you wish to use an AMBA PrimeCell UART as the system - console (the system console is the device which receives all kernel - messages and warnings and which allows logins in single user mode). - - Even if you say Y here, the currently visible framebuffer console - (/dev/tty0) will still be used as the system console by default, but - you can alter that using a kernel command line option such as - "console=ttyAM0". (Try "man bootparam" or see the documentation of - your boot loader (lilo or loadlin) about how to pass options to the - kernel at boot time.) - -config SERIAL_AMBA_PL011 - tristate "ARM AMBA PL011 serial port support" - depends on ARM_AMBA - select SERIAL_CORE - help - This selects the ARM(R) AMBA(R) PrimeCell PL011 UART. If you have - an Integrator/PP2, Integrator/CP or Versatile platform, say Y or M - here. - - If unsure, say N. - -config SERIAL_AMBA_PL011_CONSOLE - bool "Support for console on AMBA serial port" - depends on SERIAL_AMBA_PL011=y - select SERIAL_CORE_CONSOLE - ---help--- - Say Y here if you wish to use an AMBA PrimeCell UART as the system - console (the system console is the device which receives all kernel - messages and warnings and which allows logins in single user mode). - - Even if you say Y here, the currently visible framebuffer console - (/dev/tty0) will still be used as the system console by default, but - you can alter that using a kernel command line option such as - "console=ttyAMA0". (Try "man bootparam" or see the documentation of - your boot loader (lilo or loadlin) about how to pass options to the - kernel at boot time.) - -config SERIAL_SB1250_DUART - tristate "BCM1xxx on-chip DUART serial support" - depends on SIBYTE_SB1xxx_SOC=y - select SERIAL_CORE - default y - ---help--- - Support for the asynchronous serial interface (DUART) included in - the BCM1250 and derived System-On-a-Chip (SOC) devices. Note that - the letter D in DUART stands for "dual", which is how the device - is implemented. Depending on the SOC configuration there may be - one or more DUARTs available of which all are handled. - - If unsure, say Y. To compile this driver as a module, choose M here: - the module will be called sb1250-duart. - -config SERIAL_SB1250_DUART_CONSOLE - bool "Support for console on a BCM1xxx DUART serial port" - depends on SERIAL_SB1250_DUART=y - select SERIAL_CORE_CONSOLE - default y - ---help--- - If you say Y here, it will be possible to use a serial port as the - system console (the system console is the device which receives all - kernel messages and warnings and which allows logins in single user - mode). - - If unsure, say Y. - -config SERIAL_ATMEL - bool "AT91 / AT32 on-chip serial port support" - depends on (ARM && ARCH_AT91) || AVR32 - select SERIAL_CORE - help - This enables the driver for the on-chip UARTs of the Atmel - AT91 and AT32 processors. - -config SERIAL_ATMEL_CONSOLE - bool "Support for console on AT91 / AT32 serial port" - depends on SERIAL_ATMEL=y - select SERIAL_CORE_CONSOLE - help - Say Y here if you wish to use an on-chip UART on a Atmel - AT91 or AT32 processor as the system console (the system - console is the device which receives all kernel messages and - warnings and which allows logins in single user mode). - -config SERIAL_ATMEL_PDC - bool "Support DMA transfers on AT91 / AT32 serial port" - depends on SERIAL_ATMEL - default y - help - Say Y here if you wish to use the PDC to do DMA transfers to - and from the Atmel AT91 / AT32 serial port. In order to - actually use DMA transfers, make sure that the use_dma_tx - and use_dma_rx members in the atmel_uart_data struct is set - appropriately for each port. - - Note that break and error handling currently doesn't work - properly when DMA is enabled. Make sure that ports where - this matters don't use DMA. - -config SERIAL_ATMEL_TTYAT - bool "Install as device ttyATn instead of ttySn" - depends on SERIAL_ATMEL=y - help - Say Y here if you wish to have the internal AT91 / AT32 UARTs - appear as /dev/ttyATn (major 204, minor starting at 154) - instead of the normal /dev/ttySn (major 4, minor starting at - 64). This is necessary if you also want other UARTs, such as - external 8250/16C550 compatible UARTs. - The ttySn nodes are legally reserved for the 8250 serial driver - but are often misused by other serial drivers. - - To use this, you should create suitable ttyATn device nodes in - /dev/, and pass "console=ttyATn" to the kernel. - - Say Y if you have an external 8250/16C550 UART. If unsure, say N. - -config SERIAL_KS8695 - bool "Micrel KS8695 (Centaur) serial port support" - depends on ARCH_KS8695 - select SERIAL_CORE - help - This selects the Micrel Centaur KS8695 UART. Say Y here. - -config SERIAL_KS8695_CONSOLE - bool "Support for console on KS8695 (Centaur) serial port" - depends on SERIAL_KS8695=y - select SERIAL_CORE_CONSOLE - help - Say Y here if you wish to use a KS8695 (Centaur) UART as the - system console (the system console is the device which - receives all kernel messages and warnings and which allows - logins in single user mode). - -config SERIAL_CLPS711X - tristate "CLPS711X serial port support" - depends on ARM && ARCH_CLPS711X - select SERIAL_CORE - help - ::: To be written ::: - -config SERIAL_CLPS711X_CONSOLE - bool "Support for console on CLPS711X serial port" - depends on SERIAL_CLPS711X=y - select SERIAL_CORE_CONSOLE - help - Even if you say Y here, the currently visible virtual console - (/dev/tty0) will still be used as the system console by default, but - you can alter that using a kernel command line option such as - "console=ttyCL1". (Try "man bootparam" or see the documentation of - your boot loader (lilo or loadlin) about how to pass options to the - kernel at boot time.) - -config SERIAL_SAMSUNG - tristate "Samsung SoC serial support" - depends on ARM && PLAT_SAMSUNG - select SERIAL_CORE - help - Support for the on-chip UARTs on the Samsung S3C24XX series CPUs, - providing /dev/ttySAC0, 1 and 2 (note, some machines may not - provide all of these ports, depending on how the serial port - pins are configured. - -config SERIAL_SAMSUNG_UARTS_4 - bool - depends on ARM && PLAT_SAMSUNG - default y if CPU_S3C2443 - help - Internal node for the common case of 4 Samsung compatible UARTs - -config SERIAL_SAMSUNG_UARTS - int - depends on ARM && PLAT_SAMSUNG - default 2 if ARCH_S3C2400 - default 6 if ARCH_S5P6450 - default 4 if SERIAL_SAMSUNG_UARTS_4 - default 3 - help - Select the number of available UART ports for the Samsung S3C - serial driver - -config SERIAL_SAMSUNG_DEBUG - bool "Samsung SoC serial debug" - depends on SERIAL_SAMSUNG && DEBUG_LL - help - Add support for debugging the serial driver. Since this is - generally being used as a console, we use our own output - routines that go via the low-level debug printascii() - function. - -config SERIAL_SAMSUNG_CONSOLE - bool "Support for console on Samsung SoC serial port" - depends on SERIAL_SAMSUNG=y - select SERIAL_CORE_CONSOLE - help - Allow selection of the S3C24XX on-board serial ports for use as - an virtual console. - - Even if you say Y here, the currently visible virtual console - (/dev/tty0) will still be used as the system console by default, but - you can alter that using a kernel command line option such as - "console=ttySACx". (Try "man bootparam" or see the documentation of - your boot loader about how to pass options to the kernel at - boot time.) - -config SERIAL_S3C2400 - tristate "Samsung S3C2410 Serial port support" - depends on ARM && SERIAL_SAMSUNG && CPU_S3C2400 - default y if CPU_S3C2400 - help - Serial port support for the Samsung S3C2400 SoC - -config SERIAL_S3C2410 - tristate "Samsung S3C2410 Serial port support" - depends on SERIAL_SAMSUNG && CPU_S3C2410 - default y if CPU_S3C2410 - help - Serial port support for the Samsung S3C2410 SoC - -config SERIAL_S3C2412 - tristate "Samsung S3C2412/S3C2413 Serial port support" - depends on SERIAL_SAMSUNG && CPU_S3C2412 - default y if CPU_S3C2412 - help - Serial port support for the Samsung S3C2412 and S3C2413 SoC - -config SERIAL_S3C2440 - tristate "Samsung S3C2440/S3C2442/S3C2416 Serial port support" - depends on SERIAL_SAMSUNG && (CPU_S3C2440 || CPU_S3C2442 || CPU_S3C2416) - default y if CPU_S3C2440 - default y if CPU_S3C2442 - select SERIAL_SAMSUNG_UARTS_4 if CPU_S3C2416 - help - Serial port support for the Samsung S3C2440, S3C2416 and S3C2442 SoC - -config SERIAL_S3C24A0 - tristate "Samsung S3C24A0 Serial port support" - depends on SERIAL_SAMSUNG && CPU_S3C24A0 - default y if CPU_S3C24A0 - help - Serial port support for the Samsung S3C24A0 SoC - -config SERIAL_S3C6400 - tristate "Samsung S3C6400/S3C6410/S5P6440/S5P6450/S5PC100 Serial port support" - depends on SERIAL_SAMSUNG && (CPU_S3C6400 || CPU_S3C6410 || CPU_S5P6440 || CPU_S5P6450 || CPU_S5PC100) - select SERIAL_SAMSUNG_UARTS_4 - default y - help - Serial port support for the Samsung S3C6400, S3C6410, S5P6440, S5P6450 - and S5PC100 SoCs - -config SERIAL_S5PV210 - tristate "Samsung S5PV210 Serial port support" - depends on SERIAL_SAMSUNG && (CPU_S5PV210 || CPU_S5P6442 || CPU_S5PV310) - select SERIAL_SAMSUNG_UARTS_4 if (CPU_S5PV210 || CPU_S5PV310) - default y - help - Serial port support for Samsung's S5P Family of SoC's - - -config SERIAL_MAX3100 - tristate "MAX3100 support" - depends on SPI - select SERIAL_CORE - help - MAX3100 chip support - -config SERIAL_MAX3107 - tristate "MAX3107 support" - depends on SPI - select SERIAL_CORE - help - MAX3107 chip support - -config SERIAL_MAX3107_AAVA - tristate "MAX3107 AAVA platform support" - depends on X86_MRST && SERIAL_MAX3107 && GPIOLIB - select SERIAL_CORE - help - Support for the MAX3107 chip configuration found on the AAVA - platform. Includes the extra initialisation and GPIO support - neded for this device. - -config SERIAL_DZ - bool "DECstation DZ serial driver" - depends on MACH_DECSTATION && 32BIT - select SERIAL_CORE - default y - ---help--- - DZ11-family serial controllers for DECstations and VAXstations, - including the DC7085, M7814, and M7819. - -config SERIAL_DZ_CONSOLE - bool "Support console on DECstation DZ serial driver" - depends on SERIAL_DZ=y - select SERIAL_CORE_CONSOLE - default y - ---help--- - If you say Y here, it will be possible to use a serial port as the - system console (the system console is the device which receives all - kernel messages and warnings and which allows logins in single user - mode). - - Note that the firmware uses ttyS3 as the serial console on - DECstations that use this driver. - - If unsure, say Y. - -config SERIAL_ZS - tristate "DECstation Z85C30 serial support" - depends on MACH_DECSTATION - select SERIAL_CORE - default y - ---help--- - Support for the Zilog 85C350 serial communications controller used - for serial ports in newer DECstation systems. These include the - DECsystem 5900 and all models of the DECstation and DECsystem 5000 - systems except from model 200. - - If unsure, say Y. To compile this driver as a module, choose M here: - the module will be called zs. - -config SERIAL_ZS_CONSOLE - bool "Support for console on a DECstation Z85C30 serial port" - depends on SERIAL_ZS=y - select SERIAL_CORE_CONSOLE - default y - ---help--- - If you say Y here, it will be possible to use a serial port as the - system console (the system console is the device which receives all - kernel messages and warnings and which allows logins in single user - mode). - - Note that the firmware uses ttyS1 as the serial console on the - Maxine and ttyS3 on the others using this driver. - - If unsure, say Y. - -config SERIAL_21285 - tristate "DC21285 serial port support" - depends on ARM && FOOTBRIDGE - select SERIAL_CORE - help - If you have a machine based on a 21285 (Footbridge) StrongARM(R)/ - PCI bridge you can enable its onboard serial port by enabling this - option. - -config SERIAL_21285_CONSOLE - bool "Console on DC21285 serial port" - depends on SERIAL_21285=y - select SERIAL_CORE_CONSOLE - help - If you have enabled the serial port on the 21285 footbridge you can - make it the console by answering Y to this option. - - Even if you say Y here, the currently visible virtual console - (/dev/tty0) will still be used as the system console by default, but - you can alter that using a kernel command line option such as - "console=ttyFB". (Try "man bootparam" or see the documentation of - your boot loader (lilo or loadlin) about how to pass options to the - kernel at boot time.) - -config SERIAL_MPSC - bool "Marvell MPSC serial port support" - depends on PPC32 && MV64X60 - select SERIAL_CORE - help - Say Y here if you want to use the Marvell MPSC serial controller. - -config SERIAL_MPSC_CONSOLE - bool "Support for console on Marvell MPSC serial port" - depends on SERIAL_MPSC - select SERIAL_CORE_CONSOLE - help - Say Y here if you want to support a serial console on a Marvell MPSC. - -config SERIAL_PXA - bool "PXA serial port support" - depends on ARCH_PXA || ARCH_MMP - select SERIAL_CORE - help - If you have a machine based on an Intel XScale PXA2xx CPU you - can enable its onboard serial ports by enabling this option. - -config SERIAL_PXA_CONSOLE - bool "Console on PXA serial port" - depends on SERIAL_PXA - select SERIAL_CORE_CONSOLE - help - If you have enabled the serial port on the Intel XScale PXA - CPU you can make it the console by answering Y to this option. - - Even if you say Y here, the currently visible virtual console - (/dev/tty0) will still be used as the system console by default, but - you can alter that using a kernel command line option such as - "console=ttySA0". (Try "man bootparam" or see the documentation of - your boot loader (lilo or loadlin) about how to pass options to the - kernel at boot time.) - -config SERIAL_SA1100 - bool "SA1100 serial port support" - depends on ARM && ARCH_SA1100 - select SERIAL_CORE - help - If you have a machine based on a SA1100/SA1110 StrongARM(R) CPU you - can enable its onboard serial port by enabling this option. - Please read <file:Documentation/arm/SA1100/serial_UART> for further - info. - -config SERIAL_SA1100_CONSOLE - bool "Console on SA1100 serial port" - depends on SERIAL_SA1100 - select SERIAL_CORE_CONSOLE - help - If you have enabled the serial port on the SA1100/SA1110 StrongARM - CPU you can make it the console by answering Y to this option. - - Even if you say Y here, the currently visible virtual console - (/dev/tty0) will still be used as the system console by default, but - you can alter that using a kernel command line option such as - "console=ttySA0". (Try "man bootparam" or see the documentation of - your boot loader (lilo or loadlin) about how to pass options to the - kernel at boot time.) - -config SERIAL_MRST_MAX3110 - tristate "SPI UART driver for Max3110" - depends on SPI_DW_PCI - select SERIAL_CORE - select SERIAL_CORE_CONSOLE - help - This is the UART protocol driver for the MAX3110 device on - the Intel Moorestown platform. On other systems use the max3100 - driver. - -config SERIAL_MFD_HSU - tristate "Medfield High Speed UART support" - depends on PCI - select SERIAL_CORE - -config SERIAL_MFD_HSU_CONSOLE - boolean "Medfile HSU serial console support" - depends on SERIAL_MFD_HSU=y - select SERIAL_CORE_CONSOLE - -config SERIAL_BFIN - tristate "Blackfin serial port support" - depends on BLACKFIN - select SERIAL_CORE - select SERIAL_BFIN_UART0 if (BF531 || BF532 || BF533 || BF561) - help - Add support for the built-in UARTs on the Blackfin. - - To compile this driver as a module, choose M here: the - module will be called bfin_5xx. - -config SERIAL_BFIN_CONSOLE - bool "Console on Blackfin serial port" - depends on SERIAL_BFIN=y - select SERIAL_CORE_CONSOLE - -choice - prompt "UART Mode" - depends on SERIAL_BFIN - default SERIAL_BFIN_DMA - help - This driver supports the built-in serial ports of the Blackfin family - of CPUs - -config SERIAL_BFIN_DMA - bool "DMA mode" - depends on !DMA_UNCACHED_NONE && KGDB_SERIAL_CONSOLE=n - help - This driver works under DMA mode. If this option is selected, the - blackfin simple dma driver is also enabled. - -config SERIAL_BFIN_PIO - bool "PIO mode" - help - This driver works under PIO mode. - -endchoice - -config SERIAL_BFIN_UART0 - bool "Enable UART0" - depends on SERIAL_BFIN - help - Enable UART0 - -config BFIN_UART0_CTSRTS - bool "Enable UART0 hardware flow control" - depends on SERIAL_BFIN_UART0 - help - Enable hardware flow control in the driver. - -config SERIAL_BFIN_UART1 - bool "Enable UART1" - depends on SERIAL_BFIN && (!BF531 && !BF532 && !BF533 && !BF561) - help - Enable UART1 - -config BFIN_UART1_CTSRTS - bool "Enable UART1 hardware flow control" - depends on SERIAL_BFIN_UART1 - help - Enable hardware flow control in the driver. - -config SERIAL_BFIN_UART2 - bool "Enable UART2" - depends on SERIAL_BFIN && (BF54x || BF538 || BF539) - help - Enable UART2 - -config BFIN_UART2_CTSRTS - bool "Enable UART2 hardware flow control" - depends on SERIAL_BFIN_UART2 - help - Enable hardware flow control in the driver. - -config SERIAL_BFIN_UART3 - bool "Enable UART3" - depends on SERIAL_BFIN && (BF54x) - help - Enable UART3 - -config BFIN_UART3_CTSRTS - bool "Enable UART3 hardware flow control" - depends on SERIAL_BFIN_UART3 - help - Enable hardware flow control in the driver. - -config SERIAL_IMX - bool "IMX serial port support" - depends on ARM && (ARCH_IMX || ARCH_MXC) - select SERIAL_CORE - select RATIONAL - help - If you have a machine based on a Motorola IMX CPU you - can enable its onboard serial port by enabling this option. - -config SERIAL_IMX_CONSOLE - bool "Console on IMX serial port" - depends on SERIAL_IMX - select SERIAL_CORE_CONSOLE - help - If you have enabled the serial port on the Motorola IMX - CPU you can make it the console by answering Y to this option. - - Even if you say Y here, the currently visible virtual console - (/dev/tty0) will still be used as the system console by default, but - you can alter that using a kernel command line option such as - "console=ttySA0". (Try "man bootparam" or see the documentation of - your boot loader (lilo or loadlin) about how to pass options to the - kernel at boot time.) - -config SERIAL_UARTLITE - tristate "Xilinx uartlite serial port support" - depends on PPC32 || MICROBLAZE || MFD_TIMBERDALE - select SERIAL_CORE - help - Say Y here if you want to use the Xilinx uartlite serial controller. - - To compile this driver as a module, choose M here: the - module will be called uartlite. - -config SERIAL_UARTLITE_CONSOLE - bool "Support for console on Xilinx uartlite serial port" - depends on SERIAL_UARTLITE=y - select SERIAL_CORE_CONSOLE - help - Say Y here if you wish to use a Xilinx uartlite as the system - console (the system console is the device which receives all kernel - messages and warnings and which allows logins in single user mode). - -config SERIAL_SUNCORE - bool - depends on SPARC - select SERIAL_CORE - select SERIAL_CORE_CONSOLE - default y - -config SERIAL_SUNZILOG - tristate "Sun Zilog8530 serial support" - depends on SPARC - help - This driver supports the Zilog8530 serial ports found on many Sparc - systems. Say Y or M if you want to be able to these serial ports. - -config SERIAL_SUNZILOG_CONSOLE - bool "Console on Sun Zilog8530 serial port" - depends on SERIAL_SUNZILOG=y - help - If you would like to be able to use the Zilog8530 serial port - on your Sparc system as the console, you can do so by answering - Y to this option. - -config SERIAL_SUNSU - tristate "Sun SU serial support" - depends on SPARC && PCI - help - This driver supports the 8250 serial ports that run the keyboard and - mouse on (PCI) UltraSPARC systems. Say Y or M if you want to be able - to these serial ports. - -config SERIAL_SUNSU_CONSOLE - bool "Console on Sun SU serial port" - depends on SERIAL_SUNSU=y - help - If you would like to be able to use the SU serial port - on your Sparc system as the console, you can do so by answering - Y to this option. - -config SERIAL_MUX - tristate "Serial MUX support" - depends on GSC - select SERIAL_CORE - default y - ---help--- - Saying Y here will enable the hardware MUX serial driver for - the Nova, K class systems and D class with a 'remote control card'. - The hardware MUX is not 8250/16550 compatible therefore the - /dev/ttyB0 device is shared between the Serial MUX and the PDC - software console. The following steps need to be completed to use - the Serial MUX: - - 1. create the device entry (mknod /dev/ttyB0 c 11 0) - 2. Edit the /etc/inittab to start a getty listening on /dev/ttyB0 - 3. Add device ttyB0 to /etc/securetty (if you want to log on as - root on this console.) - 4. Change the kernel command console parameter to: console=ttyB0 - -config SERIAL_MUX_CONSOLE - bool "Support for console on serial MUX" - depends on SERIAL_MUX=y - select SERIAL_CORE_CONSOLE - default y - -config PDC_CONSOLE - bool "PDC software console support" - depends on PARISC && !SERIAL_MUX && VT - default n - help - Saying Y here will enable the software based PDC console to be - used as the system console. This is useful for machines in - which the hardware based console has not been written yet. The - following steps must be competed to use the PDC console: - - 1. create the device entry (mknod /dev/ttyB0 c 11 0) - 2. Edit the /etc/inittab to start a getty listening on /dev/ttyB0 - 3. Add device ttyB0 to /etc/securetty (if you want to log on as - root on this console.) - 4. Change the kernel command console parameter to: console=ttyB0 - -config SERIAL_SUNSAB - tristate "Sun Siemens SAB82532 serial support" - depends on SPARC && PCI - help - This driver supports the Siemens SAB82532 DUSCC serial ports on newer - (PCI) UltraSPARC systems. Say Y or M if you want to be able to these - serial ports. - -config SERIAL_SUNSAB_CONSOLE - bool "Console on Sun Siemens SAB82532 serial port" - depends on SERIAL_SUNSAB=y - help - If you would like to be able to use the SAB82532 serial port - on your Sparc system as the console, you can do so by answering - Y to this option. - -config SERIAL_SUNHV - bool "Sun4v Hypervisor Console support" - depends on SPARC64 - help - This driver supports the console device found on SUN4V Sparc - systems. Say Y if you want to be able to use this device. - -config SERIAL_IP22_ZILOG - tristate "SGI Zilog8530 serial support" - depends on SGI_HAS_ZILOG - select SERIAL_CORE - help - This driver supports the Zilog8530 serial ports found on SGI - systems. Say Y or M if you want to be able to these serial ports. - -config SERIAL_IP22_ZILOG_CONSOLE - bool "Console on SGI Zilog8530 serial port" - depends on SERIAL_IP22_ZILOG=y - select SERIAL_CORE_CONSOLE - -config SERIAL_SH_SCI - tristate "SuperH SCI(F) serial port support" - depends on HAVE_CLK && (SUPERH || H8300 || ARCH_SHMOBILE) - select SERIAL_CORE - -config SERIAL_SH_SCI_NR_UARTS - int "Maximum number of SCI(F) serial ports" - depends on SERIAL_SH_SCI - default "2" - -config SERIAL_SH_SCI_CONSOLE - bool "Support for console on SuperH SCI(F)" - depends on SERIAL_SH_SCI=y - select SERIAL_CORE_CONSOLE - -config SERIAL_SH_SCI_DMA - bool "DMA support" - depends on SERIAL_SH_SCI && SH_DMAE && EXPERIMENTAL - -config SERIAL_PNX8XXX - bool "Enable PNX8XXX SoCs' UART Support" - depends on MIPS && (SOC_PNX8550 || SOC_PNX833X) - select SERIAL_CORE - help - If you have a MIPS-based Philips SoC such as PNX8550 or PNX8330 - and you want to use serial ports, say Y. Otherwise, say N. - -config SERIAL_PNX8XXX_CONSOLE - bool "Enable PNX8XX0 serial console" - depends on SERIAL_PNX8XXX - select SERIAL_CORE_CONSOLE - help - If you have a MIPS-based Philips SoC such as PNX8550 or PNX8330 - and you want to use serial console, say Y. Otherwise, say N. - -config SERIAL_CORE - tristate - -config SERIAL_CORE_CONSOLE - bool - -config CONSOLE_POLL - bool - -config SERIAL_68328 - bool "68328 serial support" - depends on M68328 || M68EZ328 || M68VZ328 - help - This driver supports the built-in serial port of the Motorola 68328 - (standard, EZ and VZ varieties). - -config SERIAL_68328_RTS_CTS - bool "Support RTS/CTS on 68328 serial port" - depends on SERIAL_68328 - -config SERIAL_MCF - bool "Coldfire serial support" - depends on COLDFIRE - select SERIAL_CORE - help - This serial driver supports the Freescale Coldfire serial ports. - -config SERIAL_MCF_BAUDRATE - int "Default baudrate for Coldfire serial ports" - depends on SERIAL_MCF - default 19200 - help - This setting lets you define what the default baudrate is for the - ColdFire serial ports. The usual default varies from board to board, - and this setting is a way of catering for that. - -config SERIAL_MCF_CONSOLE - bool "Coldfire serial console support" - depends on SERIAL_MCF - select SERIAL_CORE_CONSOLE - help - Enable a ColdFire internal serial port to be the system console. - -config SERIAL_68360_SMC - bool "68360 SMC uart support" - depends on M68360 - help - This driver supports the SMC serial ports of the Motorola 68360 CPU. - -config SERIAL_68360_SCC - bool "68360 SCC uart support" - depends on M68360 - help - This driver supports the SCC serial ports of the Motorola 68360 CPU. - -config SERIAL_68360 - bool - depends on SERIAL_68360_SMC || SERIAL_68360_SCC - default y - -config SERIAL_PMACZILOG - tristate "Mac or PowerMac z85c30 ESCC support" - depends on (M68K && MAC) || (PPC_OF && PPC_PMAC) - select SERIAL_CORE - help - This driver supports the Zilog z85C30 serial ports found on - (Power)Mac machines. - Say Y or M if you want to be able to these serial ports. - -config SERIAL_PMACZILOG_TTYS - bool "Use ttySn device nodes for Zilog z85c30" - depends on SERIAL_PMACZILOG - help - The pmac_zilog driver for the z85C30 chip on many powermacs - historically used the device numbers for /dev/ttySn. The - 8250 serial port driver also uses these numbers, which means - the two drivers being unable to coexist; you could not use - both z85C30 and 8250 type ports at the same time. - - If this option is not selected, the pmac_zilog driver will - use the device numbers allocated for /dev/ttyPZn. This allows - the pmac_zilog and 8250 drivers to co-exist, but may cause - existing userspace setups to break. Programs that need to - access the built-in serial ports on powermacs will need to - be reconfigured to use /dev/ttyPZn instead of /dev/ttySn. - - If you enable this option, any z85c30 ports in the system will - be registered as ttyS0 onwards as in the past, and you will be - unable to use the 8250 module for PCMCIA or other 16C550-style - UARTs. - - Say N unless you need the z85c30 ports on your (Power)Mac - to appear as /dev/ttySn. - -config SERIAL_PMACZILOG_CONSOLE - bool "Console on Mac or PowerMac z85c30 serial port" - depends on SERIAL_PMACZILOG=y - select SERIAL_CORE_CONSOLE - help - If you would like to be able to use the z85c30 serial port - on your (Power)Mac as the console, you can do so by answering - Y to this option. - -config SERIAL_LH7A40X - tristate "Sharp LH7A40X embedded UART support" - depends on ARM && ARCH_LH7A40X - select SERIAL_CORE - help - This enables support for the three on-board UARTs of the - Sharp LH7A40X series CPUs. Choose Y or M. - -config SERIAL_LH7A40X_CONSOLE - bool "Support for console on Sharp LH7A40X serial port" - depends on SERIAL_LH7A40X=y - select SERIAL_CORE_CONSOLE - help - Say Y here if you wish to use one of the serial ports as the - system console--the system console is the device which - receives all kernel messages and warnings and which allows - logins in single user mode. - - Even if you say Y here, the currently visible framebuffer console - (/dev/tty0) will still be used as the default system console, but - you can alter that using a kernel command line, for example - "console=ttyAM1". - -config SERIAL_CPM - tristate "CPM SCC/SMC serial port support" - depends on CPM2 || 8xx - select SERIAL_CORE - help - This driver supports the SCC and SMC serial ports on Motorola - embedded PowerPC that contain a CPM1 (8xx) or CPM2 (8xxx) - -config SERIAL_CPM_CONSOLE - bool "Support for console on CPM SCC/SMC serial port" - depends on SERIAL_CPM=y - select SERIAL_CORE_CONSOLE - help - Say Y here if you wish to use a SCC or SMC CPM UART as the system - console (the system console is the device which receives all kernel - messages and warnings and which allows logins in single user mode). - - Even if you say Y here, the currently visible framebuffer console - (/dev/tty0) will still be used as the system console by default, but - you can alter that using a kernel command line option such as - "console=ttyCPM0". (Try "man bootparam" or see the documentation of - your boot loader (lilo or loadlin) about how to pass options to the - kernel at boot time.) - -config SERIAL_SGI_L1_CONSOLE - bool "SGI Altix L1 serial console support" - depends on IA64_GENERIC || IA64_SGI_SN2 - select SERIAL_CORE - select SERIAL_CORE_CONSOLE - help - If you have an SGI Altix and you would like to use the system - controller serial port as your console (you want this!), - say Y. Otherwise, say N. - -config SERIAL_MPC52xx - tristate "Freescale MPC52xx/MPC512x family PSC serial support" - depends on PPC_MPC52xx || PPC_MPC512x - select SERIAL_CORE - help - This driver supports MPC52xx and MPC512x PSC serial ports. If you would - like to use them, you must answer Y or M to this option. Note that - for use as console, it must be included in kernel and not as a - module. - -config SERIAL_MPC52xx_CONSOLE - bool "Console on a Freescale MPC52xx/MPC512x family PSC serial port" - depends on SERIAL_MPC52xx=y - select SERIAL_CORE_CONSOLE - help - Select this options if you'd like to use one of the PSC serial port - of the Freescale MPC52xx family as a console. - -config SERIAL_MPC52xx_CONSOLE_BAUD - int "Freescale MPC52xx/MPC512x family PSC serial port baud" - depends on SERIAL_MPC52xx_CONSOLE=y - default "9600" - help - Select the MPC52xx console baud rate. - This value is only used if the bootloader doesn't pass in the - console baudrate - -config SERIAL_ICOM - tristate "IBM Multiport Serial Adapter" - depends on PCI && (PPC_ISERIES || PPC_PSERIES) - select SERIAL_CORE - select FW_LOADER - help - This driver is for a family of multiport serial adapters - including 2 port RVX, 2 port internal modem, 4 port internal - modem and a split 1 port RVX and 1 port internal modem. - - This driver can also be built as a module. If so, the module - will be called icom. - -config SERIAL_M32R_SIO - bool "M32R SIO I/F" - depends on M32R - default y - select SERIAL_CORE - help - Say Y here if you want to use the M32R serial controller. - -config SERIAL_M32R_SIO_CONSOLE - bool "use SIO console" - depends on SERIAL_M32R_SIO=y - select SERIAL_CORE_CONSOLE - help - Say Y here if you want to support a serial console. - - If you use an M3T-M32700UT or an OPSPUT platform, - please say also y for SERIAL_M32R_PLDSIO. - -config SERIAL_M32R_PLDSIO - bool "M32R SIO I/F on a PLD" - depends on SERIAL_M32R_SIO=y && (PLAT_OPSPUT || PLAT_USRV || PLAT_M32700UT) - default n - help - Say Y here if you want to use the M32R serial controller - on a PLD (Programmable Logic Device). - - If you use an M3T-M32700UT or an OPSPUT platform, - please say Y. - -config SERIAL_TXX9 - bool "TMPTX39XX/49XX SIO support" - depends on HAS_TXX9_SERIAL - select SERIAL_CORE - default y - -config HAS_TXX9_SERIAL - bool - -config SERIAL_TXX9_NR_UARTS - int "Maximum number of TMPTX39XX/49XX SIO ports" - depends on SERIAL_TXX9 - default "6" - -config SERIAL_TXX9_CONSOLE - bool "TMPTX39XX/49XX SIO Console support" - depends on SERIAL_TXX9=y - select SERIAL_CORE_CONSOLE - -config SERIAL_TXX9_STDSERIAL - bool "TX39XX/49XX SIO act as standard serial" - depends on !SERIAL_8250 && SERIAL_TXX9 - -config SERIAL_VR41XX - tristate "NEC VR4100 series Serial Interface Unit support" - depends on CPU_VR41XX - select SERIAL_CORE - help - If you have a NEC VR4100 series processor and you want to use - Serial Interface Unit(SIU) or Debug Serial Interface Unit(DSIU) - (not include VR4111/VR4121 DSIU), say Y. Otherwise, say N. - -config SERIAL_VR41XX_CONSOLE - bool "Enable NEC VR4100 series Serial Interface Unit console" - depends on SERIAL_VR41XX=y - select SERIAL_CORE_CONSOLE - help - If you have a NEC VR4100 series processor and you want to use - a console on a serial port, say Y. Otherwise, say N. - -config SERIAL_JSM - tristate "Digi International NEO PCI Support" - depends on PCI - select SERIAL_CORE - help - This is a driver for Digi International's Neo series - of cards which provide multiple serial ports. You would need - something like this to connect more than two modems to your Linux - box, for instance in order to become a dial-in server. This driver - supports PCI boards only. - - If you have a card like this, say Y here, otherwise say N. - - To compile this driver as a module, choose M here: the - module will be called jsm. - -config SERIAL_SGI_IOC4 - tristate "SGI IOC4 controller serial support" - depends on (IA64_GENERIC || IA64_SGI_SN2) && SGI_IOC4 - select SERIAL_CORE - help - If you have an SGI Altix with an IOC4 based Base IO card - and wish to use the serial ports on this card, say Y. - Otherwise, say N. - -config SERIAL_SGI_IOC3 - tristate "SGI Altix IOC3 serial support" - depends on (IA64_GENERIC || IA64_SGI_SN2) && SGI_IOC3 - select SERIAL_CORE - help - If you have an SGI Altix with an IOC3 serial card, - say Y or M. Otherwise, say N. - -config SERIAL_MSM - bool "MSM on-chip serial port support" - depends on ARM && ARCH_MSM - select SERIAL_CORE - -config SERIAL_MSM_CONSOLE - bool "MSM serial console support" - depends on SERIAL_MSM=y - select SERIAL_CORE_CONSOLE - -config SERIAL_VT8500 - bool "VIA VT8500 on-chip serial port support" - depends on ARM && ARCH_VT8500 - select SERIAL_CORE - -config SERIAL_VT8500_CONSOLE - bool "VIA VT8500 serial console support" - depends on SERIAL_VT8500=y - select SERIAL_CORE_CONSOLE - -config SERIAL_NETX - tristate "NetX serial port support" - depends on ARM && ARCH_NETX - select SERIAL_CORE - help - If you have a machine based on a Hilscher NetX SoC you - can enable its onboard serial port by enabling this option. - - To compile this driver as a module, choose M here: the - module will be called netx-serial. - -config SERIAL_NETX_CONSOLE - bool "Console on NetX serial port" - depends on SERIAL_NETX=y - select SERIAL_CORE_CONSOLE - help - If you have enabled the serial port on the Hilscher NetX SoC - you can make it the console by answering Y to this option. - -config SERIAL_OF_PLATFORM - tristate "Serial port on Open Firmware platform bus" - depends on OF - depends on SERIAL_8250 || SERIAL_OF_PLATFORM_NWPSERIAL - help - If you have a PowerPC based system that has serial ports - on a platform specific bus, you should enable this option. - Currently, only 8250 compatible ports are supported, but - others can easily be added. - -config SERIAL_OMAP - tristate "OMAP serial port support" - depends on ARCH_OMAP2 || ARCH_OMAP3 || ARCH_OMAP4 - select SERIAL_CORE - help - If you have a machine based on an Texas Instruments OMAP CPU you - can enable its onboard serial ports by enabling this option. - - By enabling this option you take advantage of dma feature available - with the omap-serial driver. DMA support can be enabled from platform - data. - -config SERIAL_OMAP_CONSOLE - bool "Console on OMAP serial port" - depends on SERIAL_OMAP - select SERIAL_CORE_CONSOLE - help - Select this option if you would like to use omap serial port as - console. - - Even if you say Y here, the currently visible virtual console - (/dev/tty0) will still be used as the system console by default, but - you can alter that using a kernel command line option such as - "console=ttyOx". (Try "man bootparam" or see the documentation of - your boot loader about how to pass options to the kernel at - boot time.) - -config SERIAL_OF_PLATFORM_NWPSERIAL - tristate "NWP serial port driver" - depends on PPC_OF && PPC_DCR - select SERIAL_OF_PLATFORM - select SERIAL_CORE_CONSOLE - select SERIAL_CORE - help - This driver supports the cell network processor nwp serial - device. - -config SERIAL_OF_PLATFORM_NWPSERIAL_CONSOLE - bool "Console on NWP serial port" - depends on SERIAL_OF_PLATFORM_NWPSERIAL=y - select SERIAL_CORE_CONSOLE - help - Support for Console on the NWP serial ports. - -config SERIAL_QE - tristate "Freescale QUICC Engine serial port support" - depends on QUICC_ENGINE - select SERIAL_CORE - select FW_LOADER - default n - help - This driver supports the QE serial ports on Freescale embedded - PowerPC that contain a QUICC Engine. - -config SERIAL_SC26XX - tristate "SC2681/SC2692 serial port support" - depends on SNI_RM - select SERIAL_CORE - help - This is a driver for the onboard serial ports of - older RM400 machines. - -config SERIAL_SC26XX_CONSOLE - bool "Console on SC2681/SC2692 serial port" - depends on SERIAL_SC26XX - select SERIAL_CORE_CONSOLE - help - Support for Console on SC2681/SC2692 serial ports. - -config SERIAL_BFIN_SPORT - tristate "Blackfin SPORT emulate UART" - depends on BLACKFIN - select SERIAL_CORE - help - Enable SPORT emulate UART on Blackfin series. - - To compile this driver as a module, choose M here: the - module will be called bfin_sport_uart. - -config SERIAL_BFIN_SPORT_CONSOLE - bool "Console on Blackfin sport emulated uart" - depends on SERIAL_BFIN_SPORT=y - select SERIAL_CORE_CONSOLE - -config SERIAL_BFIN_SPORT0_UART - bool "Enable UART over SPORT0" - depends on SERIAL_BFIN_SPORT && !(BF542 || BF544) - help - Enable UART over SPORT0 - -config SERIAL_BFIN_SPORT0_UART_CTSRTS - bool "Enable UART over SPORT0 hardware flow control" - depends on SERIAL_BFIN_SPORT0_UART - help - Enable hardware flow control in the driver. - -config SERIAL_BFIN_SPORT1_UART - bool "Enable UART over SPORT1" - depends on SERIAL_BFIN_SPORT - help - Enable UART over SPORT1 - -config SERIAL_BFIN_SPORT1_UART_CTSRTS - bool "Enable UART over SPORT1 hardware flow control" - depends on SERIAL_BFIN_SPORT1_UART - help - Enable hardware flow control in the driver. - -config SERIAL_BFIN_SPORT2_UART - bool "Enable UART over SPORT2" - depends on SERIAL_BFIN_SPORT && (BF54x || BF538 || BF539) - help - Enable UART over SPORT2 - -config SERIAL_BFIN_SPORT2_UART_CTSRTS - bool "Enable UART over SPORT2 hardware flow control" - depends on SERIAL_BFIN_SPORT2_UART - help - Enable hardware flow control in the driver. - -config SERIAL_BFIN_SPORT3_UART - bool "Enable UART over SPORT3" - depends on SERIAL_BFIN_SPORT && (BF54x || BF538 || BF539) - help - Enable UART over SPORT3 - -config SERIAL_BFIN_SPORT3_UART_CTSRTS - bool "Enable UART over SPORT3 hardware flow control" - depends on SERIAL_BFIN_SPORT3_UART - help - Enable hardware flow control in the driver. - -config SERIAL_TIMBERDALE - tristate "Support for timberdale UART" - select SERIAL_CORE - ---help--- - Add support for UART controller on timberdale. - -config SERIAL_BCM63XX - tristate "bcm63xx serial port support" - select SERIAL_CORE - depends on BCM63XX - help - If you have a bcm63xx CPU, you can enable its onboard - serial port by enabling this options. - - To compile this driver as a module, choose M here: the - module will be called bcm963xx_uart. - -config SERIAL_BCM63XX_CONSOLE - bool "Console on bcm63xx serial port" - depends on SERIAL_BCM63XX=y - select SERIAL_CORE_CONSOLE - help - If you have enabled the serial port on the bcm63xx CPU - you can make it the console by answering Y to this option. - -config SERIAL_GRLIB_GAISLER_APBUART - tristate "GRLIB APBUART serial support" - depends on OF - ---help--- - Add support for the GRLIB APBUART serial port. - -config SERIAL_GRLIB_GAISLER_APBUART_CONSOLE - bool "Console on GRLIB APBUART serial port" - depends on SERIAL_GRLIB_GAISLER_APBUART=y - select SERIAL_CORE_CONSOLE - help - Support for running a console on the GRLIB APBUART - -config SERIAL_ALTERA_JTAGUART - tristate "Altera JTAG UART support" - select SERIAL_CORE - help - This driver supports the Altera JTAG UART port. - -config SERIAL_ALTERA_JTAGUART_CONSOLE - bool "Altera JTAG UART console support" - depends on SERIAL_ALTERA_JTAGUART=y - select SERIAL_CORE_CONSOLE - help - Enable a Altera JTAG UART port to be the system console. - -config SERIAL_ALTERA_JTAGUART_CONSOLE_BYPASS - bool "Bypass output when no connection" - depends on SERIAL_ALTERA_JTAGUART_CONSOLE - select SERIAL_CORE_CONSOLE - help - Bypass console output and keep going even if there is no - JTAG terminal connection with the host. - -config SERIAL_ALTERA_UART - tristate "Altera UART support" - select SERIAL_CORE - help - This driver supports the Altera softcore UART port. - -config SERIAL_ALTERA_UART_MAXPORTS - int "Maximum number of Altera UART ports" - depends on SERIAL_ALTERA_UART - default 4 - help - This setting lets you define the maximum number of the Altera - UART ports. The usual default varies from board to board, and - this setting is a way of catering for that. - -config SERIAL_ALTERA_UART_BAUDRATE - int "Default baudrate for Altera UART ports" - depends on SERIAL_ALTERA_UART - default 115200 - help - This setting lets you define what the default baudrate is for the - Altera UART ports. The usual default varies from board to board, - and this setting is a way of catering for that. - -config SERIAL_ALTERA_UART_CONSOLE - bool "Altera UART console support" - depends on SERIAL_ALTERA_UART=y - select SERIAL_CORE_CONSOLE - help - Enable a Altera UART port to be the system console. - -config SERIAL_IFX6X60 - tristate "SPI protocol driver for Infineon 6x60 modem (EXPERIMENTAL)" - depends on GPIOLIB && SPI && EXPERIMENTAL - help - Support for the IFX6x60 modem devices on Intel MID platforms. - -config SERIAL_PCH_UART - tristate "Intel EG20T PCH UART" - depends on PCI && DMADEVICES - select SERIAL_CORE - select PCH_DMA - help - This driver is for PCH(Platform controller Hub) UART of Intel EG20T - which is an IOH(Input/Output Hub) for x86 embedded processor. - Enabling PCH_DMA, this PCH UART works as DMA mode. -endmenu diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile deleted file mode 100644 index 8ea92e9c73b0..000000000000 --- a/drivers/serial/Makefile +++ /dev/null @@ -1,94 +0,0 @@ -# -# Makefile for the kernel serial device drivers. -# - -obj-$(CONFIG_SERIAL_CORE) += serial_core.o -obj-$(CONFIG_SERIAL_21285) += 21285.o - -# These Sparc drivers have to appear before others such as 8250 -# which share ttySx minor node space. Otherwise console device -# names change and other unplesantries. -obj-$(CONFIG_SERIAL_SUNCORE) += suncore.o -obj-$(CONFIG_SERIAL_SUNHV) += sunhv.o -obj-$(CONFIG_SERIAL_SUNZILOG) += sunzilog.o -obj-$(CONFIG_SERIAL_SUNSU) += sunsu.o -obj-$(CONFIG_SERIAL_SUNSAB) += sunsab.o - -obj-$(CONFIG_SERIAL_8250) += 8250.o -obj-$(CONFIG_SERIAL_8250_PNP) += 8250_pnp.o -obj-$(CONFIG_SERIAL_8250_GSC) += 8250_gsc.o -obj-$(CONFIG_SERIAL_8250_PCI) += 8250_pci.o -obj-$(CONFIG_SERIAL_8250_HP300) += 8250_hp300.o -obj-$(CONFIG_SERIAL_8250_CS) += serial_cs.o -obj-$(CONFIG_SERIAL_8250_ACORN) += 8250_acorn.o -obj-$(CONFIG_SERIAL_8250_CONSOLE) += 8250_early.o -obj-$(CONFIG_SERIAL_8250_FOURPORT) += 8250_fourport.o -obj-$(CONFIG_SERIAL_8250_ACCENT) += 8250_accent.o -obj-$(CONFIG_SERIAL_8250_BOCA) += 8250_boca.o -obj-$(CONFIG_SERIAL_8250_EXAR_ST16C554) += 8250_exar_st16c554.o -obj-$(CONFIG_SERIAL_8250_HUB6) += 8250_hub6.o -obj-$(CONFIG_SERIAL_8250_MCA) += 8250_mca.o -obj-$(CONFIG_SERIAL_AMBA_PL010) += amba-pl010.o -obj-$(CONFIG_SERIAL_AMBA_PL011) += amba-pl011.o -obj-$(CONFIG_SERIAL_CLPS711X) += clps711x.o -obj-$(CONFIG_SERIAL_PXA) += pxa.o -obj-$(CONFIG_SERIAL_PNX8XXX) += pnx8xxx_uart.o -obj-$(CONFIG_SERIAL_SA1100) += sa1100.o -obj-$(CONFIG_SERIAL_BCM63XX) += bcm63xx_uart.o -obj-$(CONFIG_SERIAL_BFIN) += bfin_5xx.o -obj-$(CONFIG_SERIAL_BFIN_SPORT) += bfin_sport_uart.o -obj-$(CONFIG_SERIAL_SAMSUNG) += samsung.o -obj-$(CONFIG_SERIAL_S3C2400) += s3c2400.o -obj-$(CONFIG_SERIAL_S3C2410) += s3c2410.o -obj-$(CONFIG_SERIAL_S3C2412) += s3c2412.o -obj-$(CONFIG_SERIAL_S3C2440) += s3c2440.o -obj-$(CONFIG_SERIAL_S3C24A0) += s3c24a0.o -obj-$(CONFIG_SERIAL_S3C6400) += s3c6400.o -obj-$(CONFIG_SERIAL_S5PV210) += s5pv210.o -obj-$(CONFIG_SERIAL_MAX3100) += max3100.o -obj-$(CONFIG_SERIAL_MAX3107) += max3107.o -obj-$(CONFIG_SERIAL_MAX3107_AAVA) += max3107-aava.o -obj-$(CONFIG_SERIAL_IP22_ZILOG) += ip22zilog.o -obj-$(CONFIG_SERIAL_MUX) += mux.o -obj-$(CONFIG_SERIAL_68328) += 68328serial.o -obj-$(CONFIG_SERIAL_68360) += 68360serial.o -obj-$(CONFIG_SERIAL_MCF) += mcf.o -obj-$(CONFIG_SERIAL_PMACZILOG) += pmac_zilog.o -obj-$(CONFIG_SERIAL_LH7A40X) += serial_lh7a40x.o -obj-$(CONFIG_SERIAL_DZ) += dz.o -obj-$(CONFIG_SERIAL_ZS) += zs.o -obj-$(CONFIG_SERIAL_SH_SCI) += sh-sci.o -obj-$(CONFIG_SERIAL_SGI_L1_CONSOLE) += sn_console.o -obj-$(CONFIG_SERIAL_CPM) += cpm_uart/ -obj-$(CONFIG_SERIAL_IMX) += imx.o -obj-$(CONFIG_SERIAL_MPC52xx) += mpc52xx_uart.o -obj-$(CONFIG_SERIAL_ICOM) += icom.o -obj-$(CONFIG_SERIAL_M32R_SIO) += m32r_sio.o -obj-$(CONFIG_SERIAL_MPSC) += mpsc.o -obj-$(CONFIG_SERIAL_SB1250_DUART) += sb1250-duart.o -obj-$(CONFIG_ETRAX_SERIAL) += crisv10.o -obj-$(CONFIG_SERIAL_SC26XX) += sc26xx.o -obj-$(CONFIG_SERIAL_JSM) += jsm/ -obj-$(CONFIG_SERIAL_TXX9) += serial_txx9.o -obj-$(CONFIG_SERIAL_VR41XX) += vr41xx_siu.o -obj-$(CONFIG_SERIAL_SGI_IOC4) += ioc4_serial.o -obj-$(CONFIG_SERIAL_SGI_IOC3) += ioc3_serial.o -obj-$(CONFIG_SERIAL_ATMEL) += atmel_serial.o -obj-$(CONFIG_SERIAL_UARTLITE) += uartlite.o -obj-$(CONFIG_SERIAL_MSM) += msm_serial.o -obj-$(CONFIG_SERIAL_NETX) += netx-serial.o -obj-$(CONFIG_SERIAL_OF_PLATFORM) += of_serial.o -obj-$(CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL) += nwpserial.o -obj-$(CONFIG_SERIAL_KS8695) += serial_ks8695.o -obj-$(CONFIG_SERIAL_OMAP) += omap-serial.o -obj-$(CONFIG_KGDB_SERIAL_CONSOLE) += kgdboc.o -obj-$(CONFIG_SERIAL_QE) += ucc_uart.o -obj-$(CONFIG_SERIAL_TIMBERDALE) += timbuart.o -obj-$(CONFIG_SERIAL_GRLIB_GAISLER_APBUART) += apbuart.o -obj-$(CONFIG_SERIAL_ALTERA_JTAGUART) += altera_jtaguart.o -obj-$(CONFIG_SERIAL_ALTERA_UART) += altera_uart.o -obj-$(CONFIG_SERIAL_VT8500) += vt8500_serial.o -obj-$(CONFIG_SERIAL_MRST_MAX3110) += mrst_max3110.o -obj-$(CONFIG_SERIAL_MFD_HSU) += mfd.o -obj-$(CONFIG_SERIAL_IFX6X60) += ifx6x60.o -obj-$(CONFIG_SERIAL_PCH_UART) += pch_uart.o diff --git a/drivers/serial/altera_jtaguart.c b/drivers/serial/altera_jtaguart.c deleted file mode 100644 index f9b49b5ff5e1..000000000000 --- a/drivers/serial/altera_jtaguart.c +++ /dev/null @@ -1,504 +0,0 @@ -/* - * altera_jtaguart.c -- Altera JTAG UART driver - * - * Based on mcf.c -- Freescale ColdFire UART driver - * - * (C) Copyright 2003-2007, Greg Ungerer <gerg@snapgear.com> - * (C) Copyright 2008, Thomas Chou <thomas@wytron.com.tw> - * (C) Copyright 2010, Tobias Klauser <tklauser@distanz.ch> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/module.h> -#include <linux/console.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial.h> -#include <linux/serial_core.h> -#include <linux/platform_device.h> -#include <linux/io.h> -#include <linux/altera_jtaguart.h> - -#define DRV_NAME "altera_jtaguart" - -/* - * Altera JTAG UART register definitions according to the Altera JTAG UART - * datasheet: http://www.altera.com/literature/hb/nios2/n2cpu_nii51009.pdf - */ - -#define ALTERA_JTAGUART_SIZE 8 - -#define ALTERA_JTAGUART_DATA_REG 0 - -#define ALTERA_JTAGUART_DATA_DATA_MSK 0x000000FF -#define ALTERA_JTAGUART_DATA_RVALID_MSK 0x00008000 -#define ALTERA_JTAGUART_DATA_RAVAIL_MSK 0xFFFF0000 -#define ALTERA_JTAGUART_DATA_RAVAIL_OFF 16 - -#define ALTERA_JTAGUART_CONTROL_REG 4 - -#define ALTERA_JTAGUART_CONTROL_RE_MSK 0x00000001 -#define ALTERA_JTAGUART_CONTROL_WE_MSK 0x00000002 -#define ALTERA_JTAGUART_CONTROL_RI_MSK 0x00000100 -#define ALTERA_JTAGUART_CONTROL_RI_OFF 8 -#define ALTERA_JTAGUART_CONTROL_WI_MSK 0x00000200 -#define ALTERA_JTAGUART_CONTROL_AC_MSK 0x00000400 -#define ALTERA_JTAGUART_CONTROL_WSPACE_MSK 0xFFFF0000 -#define ALTERA_JTAGUART_CONTROL_WSPACE_OFF 16 - -/* - * Local per-uart structure. - */ -struct altera_jtaguart { - struct uart_port port; - unsigned int sigs; /* Local copy of line sigs */ - unsigned long imr; /* Local IMR mirror */ -}; - -static unsigned int altera_jtaguart_tx_empty(struct uart_port *port) -{ - return (readl(port->membase + ALTERA_JTAGUART_CONTROL_REG) & - ALTERA_JTAGUART_CONTROL_WSPACE_MSK) ? TIOCSER_TEMT : 0; -} - -static unsigned int altera_jtaguart_get_mctrl(struct uart_port *port) -{ - return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; -} - -static void altera_jtaguart_set_mctrl(struct uart_port *port, unsigned int sigs) -{ -} - -static void altera_jtaguart_start_tx(struct uart_port *port) -{ - struct altera_jtaguart *pp = - container_of(port, struct altera_jtaguart, port); - - pp->imr |= ALTERA_JTAGUART_CONTROL_WE_MSK; - writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); -} - -static void altera_jtaguart_stop_tx(struct uart_port *port) -{ - struct altera_jtaguart *pp = - container_of(port, struct altera_jtaguart, port); - - pp->imr &= ~ALTERA_JTAGUART_CONTROL_WE_MSK; - writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); -} - -static void altera_jtaguart_stop_rx(struct uart_port *port) -{ - struct altera_jtaguart *pp = - container_of(port, struct altera_jtaguart, port); - - pp->imr &= ~ALTERA_JTAGUART_CONTROL_RE_MSK; - writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); -} - -static void altera_jtaguart_break_ctl(struct uart_port *port, int break_state) -{ -} - -static void altera_jtaguart_enable_ms(struct uart_port *port) -{ -} - -static void altera_jtaguart_set_termios(struct uart_port *port, - struct ktermios *termios, - struct ktermios *old) -{ - /* Just copy the old termios settings back */ - if (old) - tty_termios_copy_hw(termios, old); -} - -static void altera_jtaguart_rx_chars(struct altera_jtaguart *pp) -{ - struct uart_port *port = &pp->port; - unsigned char ch, flag; - unsigned long status; - - while ((status = readl(port->membase + ALTERA_JTAGUART_DATA_REG)) & - ALTERA_JTAGUART_DATA_RVALID_MSK) { - ch = status & ALTERA_JTAGUART_DATA_DATA_MSK; - flag = TTY_NORMAL; - port->icount.rx++; - - if (uart_handle_sysrq_char(port, ch)) - continue; - uart_insert_char(port, 0, 0, ch, flag); - } - - tty_flip_buffer_push(port->state->port.tty); -} - -static void altera_jtaguart_tx_chars(struct altera_jtaguart *pp) -{ - struct uart_port *port = &pp->port; - struct circ_buf *xmit = &port->state->xmit; - unsigned int pending, count; - - if (port->x_char) { - /* Send special char - probably flow control */ - writel(port->x_char, port->membase + ALTERA_JTAGUART_DATA_REG); - port->x_char = 0; - port->icount.tx++; - return; - } - - pending = uart_circ_chars_pending(xmit); - if (pending > 0) { - count = (readl(port->membase + ALTERA_JTAGUART_CONTROL_REG) & - ALTERA_JTAGUART_CONTROL_WSPACE_MSK) >> - ALTERA_JTAGUART_CONTROL_WSPACE_OFF; - if (count > pending) - count = pending; - if (count > 0) { - pending -= count; - while (count--) { - writel(xmit->buf[xmit->tail], - port->membase + ALTERA_JTAGUART_DATA_REG); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - } - if (pending < WAKEUP_CHARS) - uart_write_wakeup(port); - } - } - - if (pending == 0) { - pp->imr &= ~ALTERA_JTAGUART_CONTROL_WE_MSK; - writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); - } -} - -static irqreturn_t altera_jtaguart_interrupt(int irq, void *data) -{ - struct uart_port *port = data; - struct altera_jtaguart *pp = - container_of(port, struct altera_jtaguart, port); - unsigned int isr; - - isr = (readl(port->membase + ALTERA_JTAGUART_CONTROL_REG) >> - ALTERA_JTAGUART_CONTROL_RI_OFF) & pp->imr; - - spin_lock(&port->lock); - - if (isr & ALTERA_JTAGUART_CONTROL_RE_MSK) - altera_jtaguart_rx_chars(pp); - if (isr & ALTERA_JTAGUART_CONTROL_WE_MSK) - altera_jtaguart_tx_chars(pp); - - spin_unlock(&port->lock); - - return IRQ_RETVAL(isr); -} - -static void altera_jtaguart_config_port(struct uart_port *port, int flags) -{ - port->type = PORT_ALTERA_JTAGUART; - - /* Clear mask, so no surprise interrupts. */ - writel(0, port->membase + ALTERA_JTAGUART_CONTROL_REG); -} - -static int altera_jtaguart_startup(struct uart_port *port) -{ - struct altera_jtaguart *pp = - container_of(port, struct altera_jtaguart, port); - unsigned long flags; - int ret; - - ret = request_irq(port->irq, altera_jtaguart_interrupt, IRQF_DISABLED, - DRV_NAME, port); - if (ret) { - pr_err(DRV_NAME ": unable to attach Altera JTAG UART %d " - "interrupt vector=%d\n", port->line, port->irq); - return ret; - } - - spin_lock_irqsave(&port->lock, flags); - - /* Enable RX interrupts now */ - pp->imr = ALTERA_JTAGUART_CONTROL_RE_MSK; - writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); - - spin_unlock_irqrestore(&port->lock, flags); - - return 0; -} - -static void altera_jtaguart_shutdown(struct uart_port *port) -{ - struct altera_jtaguart *pp = - container_of(port, struct altera_jtaguart, port); - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - - /* Disable all interrupts now */ - pp->imr = 0; - writel(pp->imr, port->membase + ALTERA_JTAGUART_CONTROL_REG); - - spin_unlock_irqrestore(&port->lock, flags); - - free_irq(port->irq, port); -} - -static const char *altera_jtaguart_type(struct uart_port *port) -{ - return (port->type == PORT_ALTERA_JTAGUART) ? "Altera JTAG UART" : NULL; -} - -static int altera_jtaguart_request_port(struct uart_port *port) -{ - /* UARTs always present */ - return 0; -} - -static void altera_jtaguart_release_port(struct uart_port *port) -{ - /* Nothing to release... */ -} - -static int altera_jtaguart_verify_port(struct uart_port *port, - struct serial_struct *ser) -{ - if (ser->type != PORT_UNKNOWN && ser->type != PORT_ALTERA_JTAGUART) - return -EINVAL; - return 0; -} - -/* - * Define the basic serial functions we support. - */ -static struct uart_ops altera_jtaguart_ops = { - .tx_empty = altera_jtaguart_tx_empty, - .get_mctrl = altera_jtaguart_get_mctrl, - .set_mctrl = altera_jtaguart_set_mctrl, - .start_tx = altera_jtaguart_start_tx, - .stop_tx = altera_jtaguart_stop_tx, - .stop_rx = altera_jtaguart_stop_rx, - .enable_ms = altera_jtaguart_enable_ms, - .break_ctl = altera_jtaguart_break_ctl, - .startup = altera_jtaguart_startup, - .shutdown = altera_jtaguart_shutdown, - .set_termios = altera_jtaguart_set_termios, - .type = altera_jtaguart_type, - .request_port = altera_jtaguart_request_port, - .release_port = altera_jtaguart_release_port, - .config_port = altera_jtaguart_config_port, - .verify_port = altera_jtaguart_verify_port, -}; - -#define ALTERA_JTAGUART_MAXPORTS 1 -static struct altera_jtaguart altera_jtaguart_ports[ALTERA_JTAGUART_MAXPORTS]; - -#if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE) - -int __init early_altera_jtaguart_setup(struct altera_jtaguart_platform_uart - *platp) -{ - struct uart_port *port; - int i; - - for (i = 0; i < ALTERA_JTAGUART_MAXPORTS && platp[i].mapbase; i++) { - port = &altera_jtaguart_ports[i].port; - - port->line = i; - port->type = PORT_ALTERA_JTAGUART; - port->mapbase = platp[i].mapbase; - port->membase = ioremap(port->mapbase, ALTERA_JTAGUART_SIZE); - port->iotype = SERIAL_IO_MEM; - port->irq = platp[i].irq; - port->flags = ASYNC_BOOT_AUTOCONF; - port->ops = &altera_jtaguart_ops; - } - - return 0; -} - -#if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE_BYPASS) -static void altera_jtaguart_console_putc(struct console *co, const char c) -{ - struct uart_port *port = &(altera_jtaguart_ports + co->index)->port; - unsigned long status; - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - while (((status = readl(port->membase + ALTERA_JTAGUART_CONTROL_REG)) & - ALTERA_JTAGUART_CONTROL_WSPACE_MSK) == 0) { - if ((status & ALTERA_JTAGUART_CONTROL_AC_MSK) == 0) { - spin_unlock_irqrestore(&port->lock, flags); - return; /* no connection activity */ - } - spin_unlock_irqrestore(&port->lock, flags); - cpu_relax(); - spin_lock_irqsave(&port->lock, flags); - } - writel(c, port->membase + ALTERA_JTAGUART_DATA_REG); - spin_unlock_irqrestore(&port->lock, flags); -} -#else -static void altera_jtaguart_console_putc(struct console *co, const char c) -{ - struct uart_port *port = &(altera_jtaguart_ports + co->index)->port; - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - while ((readl(port->membase + ALTERA_JTAGUART_CONTROL_REG) & - ALTERA_JTAGUART_CONTROL_WSPACE_MSK) == 0) { - spin_unlock_irqrestore(&port->lock, flags); - cpu_relax(); - spin_lock_irqsave(&port->lock, flags); - } - writel(c, port->membase + ALTERA_JTAGUART_DATA_REG); - spin_unlock_irqrestore(&port->lock, flags); -} -#endif - -static void altera_jtaguart_console_write(struct console *co, const char *s, - unsigned int count) -{ - for (; count; count--, s++) { - altera_jtaguart_console_putc(co, *s); - if (*s == '\n') - altera_jtaguart_console_putc(co, '\r'); - } -} - -static int __init altera_jtaguart_console_setup(struct console *co, - char *options) -{ - struct uart_port *port; - - if (co->index < 0 || co->index >= ALTERA_JTAGUART_MAXPORTS) - return -EINVAL; - port = &altera_jtaguart_ports[co->index].port; - if (port->membase == 0) - return -ENODEV; - return 0; -} - -static struct uart_driver altera_jtaguart_driver; - -static struct console altera_jtaguart_console = { - .name = "ttyJ", - .write = altera_jtaguart_console_write, - .device = uart_console_device, - .setup = altera_jtaguart_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &altera_jtaguart_driver, -}; - -static int __init altera_jtaguart_console_init(void) -{ - register_console(&altera_jtaguart_console); - return 0; -} - -console_initcall(altera_jtaguart_console_init); - -#define ALTERA_JTAGUART_CONSOLE (&altera_jtaguart_console) - -#else - -#define ALTERA_JTAGUART_CONSOLE NULL - -#endif /* CONFIG_ALTERA_JTAGUART_CONSOLE */ - -static struct uart_driver altera_jtaguart_driver = { - .owner = THIS_MODULE, - .driver_name = "altera_jtaguart", - .dev_name = "ttyJ", - .major = ALTERA_JTAGUART_MAJOR, - .minor = ALTERA_JTAGUART_MINOR, - .nr = ALTERA_JTAGUART_MAXPORTS, - .cons = ALTERA_JTAGUART_CONSOLE, -}; - -static int __devinit altera_jtaguart_probe(struct platform_device *pdev) -{ - struct altera_jtaguart_platform_uart *platp = pdev->dev.platform_data; - struct uart_port *port; - int i; - - for (i = 0; i < ALTERA_JTAGUART_MAXPORTS && platp[i].mapbase; i++) { - port = &altera_jtaguart_ports[i].port; - - port->line = i; - port->type = PORT_ALTERA_JTAGUART; - port->mapbase = platp[i].mapbase; - port->membase = ioremap(port->mapbase, ALTERA_JTAGUART_SIZE); - port->iotype = SERIAL_IO_MEM; - port->irq = platp[i].irq; - port->ops = &altera_jtaguart_ops; - port->flags = ASYNC_BOOT_AUTOCONF; - - uart_add_one_port(&altera_jtaguart_driver, port); - } - - return 0; -} - -static int __devexit altera_jtaguart_remove(struct platform_device *pdev) -{ - struct uart_port *port; - int i; - - for (i = 0; i < ALTERA_JTAGUART_MAXPORTS; i++) { - port = &altera_jtaguart_ports[i].port; - if (port) - uart_remove_one_port(&altera_jtaguart_driver, port); - } - - return 0; -} - -static struct platform_driver altera_jtaguart_platform_driver = { - .probe = altera_jtaguart_probe, - .remove = __devexit_p(altera_jtaguart_remove), - .driver = { - .name = DRV_NAME, - .owner = THIS_MODULE, - }, -}; - -static int __init altera_jtaguart_init(void) -{ - int rc; - - rc = uart_register_driver(&altera_jtaguart_driver); - if (rc) - return rc; - rc = platform_driver_register(&altera_jtaguart_platform_driver); - if (rc) { - uart_unregister_driver(&altera_jtaguart_driver); - return rc; - } - return 0; -} - -static void __exit altera_jtaguart_exit(void) -{ - platform_driver_unregister(&altera_jtaguart_platform_driver); - uart_unregister_driver(&altera_jtaguart_driver); -} - -module_init(altera_jtaguart_init); -module_exit(altera_jtaguart_exit); - -MODULE_DESCRIPTION("Altera JTAG UART driver"); -MODULE_AUTHOR("Thomas Chou <thomas@wytron.com.tw>"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:" DRV_NAME); diff --git a/drivers/serial/altera_uart.c b/drivers/serial/altera_uart.c deleted file mode 100644 index 721216292a50..000000000000 --- a/drivers/serial/altera_uart.c +++ /dev/null @@ -1,608 +0,0 @@ -/* - * altera_uart.c -- Altera UART driver - * - * Based on mcf.c -- Freescale ColdFire UART driver - * - * (C) Copyright 2003-2007, Greg Ungerer <gerg@snapgear.com> - * (C) Copyright 2008, Thomas Chou <thomas@wytron.com.tw> - * (C) Copyright 2010, Tobias Klauser <tklauser@distanz.ch> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/timer.h> -#include <linux/interrupt.h> -#include <linux/module.h> -#include <linux/console.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial.h> -#include <linux/serial_core.h> -#include <linux/platform_device.h> -#include <linux/io.h> -#include <linux/altera_uart.h> - -#define DRV_NAME "altera_uart" -#define SERIAL_ALTERA_MAJOR 204 -#define SERIAL_ALTERA_MINOR 213 - -/* - * Altera UART register definitions according to the Nios UART datasheet: - * http://www.altera.com/literature/ds/ds_nios_uart.pdf - */ - -#define ALTERA_UART_SIZE 32 - -#define ALTERA_UART_RXDATA_REG 0 -#define ALTERA_UART_TXDATA_REG 4 -#define ALTERA_UART_STATUS_REG 8 -#define ALTERA_UART_CONTROL_REG 12 -#define ALTERA_UART_DIVISOR_REG 16 -#define ALTERA_UART_EOP_REG 20 - -#define ALTERA_UART_STATUS_PE_MSK 0x0001 /* parity error */ -#define ALTERA_UART_STATUS_FE_MSK 0x0002 /* framing error */ -#define ALTERA_UART_STATUS_BRK_MSK 0x0004 /* break */ -#define ALTERA_UART_STATUS_ROE_MSK 0x0008 /* RX overrun error */ -#define ALTERA_UART_STATUS_TOE_MSK 0x0010 /* TX overrun error */ -#define ALTERA_UART_STATUS_TMT_MSK 0x0020 /* TX shift register state */ -#define ALTERA_UART_STATUS_TRDY_MSK 0x0040 /* TX ready */ -#define ALTERA_UART_STATUS_RRDY_MSK 0x0080 /* RX ready */ -#define ALTERA_UART_STATUS_E_MSK 0x0100 /* exception condition */ -#define ALTERA_UART_STATUS_DCTS_MSK 0x0400 /* CTS logic-level change */ -#define ALTERA_UART_STATUS_CTS_MSK 0x0800 /* CTS logic state */ -#define ALTERA_UART_STATUS_EOP_MSK 0x1000 /* EOP written/read */ - - /* Enable interrupt on... */ -#define ALTERA_UART_CONTROL_PE_MSK 0x0001 /* ...parity error */ -#define ALTERA_UART_CONTROL_FE_MSK 0x0002 /* ...framing error */ -#define ALTERA_UART_CONTROL_BRK_MSK 0x0004 /* ...break */ -#define ALTERA_UART_CONTROL_ROE_MSK 0x0008 /* ...RX overrun */ -#define ALTERA_UART_CONTROL_TOE_MSK 0x0010 /* ...TX overrun */ -#define ALTERA_UART_CONTROL_TMT_MSK 0x0020 /* ...TX shift register empty */ -#define ALTERA_UART_CONTROL_TRDY_MSK 0x0040 /* ...TX ready */ -#define ALTERA_UART_CONTROL_RRDY_MSK 0x0080 /* ...RX ready */ -#define ALTERA_UART_CONTROL_E_MSK 0x0100 /* ...exception*/ - -#define ALTERA_UART_CONTROL_TRBK_MSK 0x0200 /* TX break */ -#define ALTERA_UART_CONTROL_DCTS_MSK 0x0400 /* Interrupt on CTS change */ -#define ALTERA_UART_CONTROL_RTS_MSK 0x0800 /* RTS signal */ -#define ALTERA_UART_CONTROL_EOP_MSK 0x1000 /* Interrupt on EOP */ - -/* - * Local per-uart structure. - */ -struct altera_uart { - struct uart_port port; - struct timer_list tmr; - unsigned int sigs; /* Local copy of line sigs */ - unsigned short imr; /* Local IMR mirror */ -}; - -static u32 altera_uart_readl(struct uart_port *port, int reg) -{ - struct altera_uart_platform_uart *platp = port->private_data; - - return readl(port->membase + (reg << platp->bus_shift)); -} - -static void altera_uart_writel(struct uart_port *port, u32 dat, int reg) -{ - struct altera_uart_platform_uart *platp = port->private_data; - - writel(dat, port->membase + (reg << platp->bus_shift)); -} - -static unsigned int altera_uart_tx_empty(struct uart_port *port) -{ - return (altera_uart_readl(port, ALTERA_UART_STATUS_REG) & - ALTERA_UART_STATUS_TMT_MSK) ? TIOCSER_TEMT : 0; -} - -static unsigned int altera_uart_get_mctrl(struct uart_port *port) -{ - struct altera_uart *pp = container_of(port, struct altera_uart, port); - unsigned int sigs; - - sigs = (altera_uart_readl(port, ALTERA_UART_STATUS_REG) & - ALTERA_UART_STATUS_CTS_MSK) ? TIOCM_CTS : 0; - sigs |= (pp->sigs & TIOCM_RTS); - - return sigs; -} - -static void altera_uart_set_mctrl(struct uart_port *port, unsigned int sigs) -{ - struct altera_uart *pp = container_of(port, struct altera_uart, port); - - pp->sigs = sigs; - if (sigs & TIOCM_RTS) - pp->imr |= ALTERA_UART_CONTROL_RTS_MSK; - else - pp->imr &= ~ALTERA_UART_CONTROL_RTS_MSK; - altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG); -} - -static void altera_uart_start_tx(struct uart_port *port) -{ - struct altera_uart *pp = container_of(port, struct altera_uart, port); - - pp->imr |= ALTERA_UART_CONTROL_TRDY_MSK; - altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG); -} - -static void altera_uart_stop_tx(struct uart_port *port) -{ - struct altera_uart *pp = container_of(port, struct altera_uart, port); - - pp->imr &= ~ALTERA_UART_CONTROL_TRDY_MSK; - altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG); -} - -static void altera_uart_stop_rx(struct uart_port *port) -{ - struct altera_uart *pp = container_of(port, struct altera_uart, port); - - pp->imr &= ~ALTERA_UART_CONTROL_RRDY_MSK; - altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG); -} - -static void altera_uart_break_ctl(struct uart_port *port, int break_state) -{ - struct altera_uart *pp = container_of(port, struct altera_uart, port); - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - if (break_state == -1) - pp->imr |= ALTERA_UART_CONTROL_TRBK_MSK; - else - pp->imr &= ~ALTERA_UART_CONTROL_TRBK_MSK; - altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG); - spin_unlock_irqrestore(&port->lock, flags); -} - -static void altera_uart_enable_ms(struct uart_port *port) -{ -} - -static void altera_uart_set_termios(struct uart_port *port, - struct ktermios *termios, - struct ktermios *old) -{ - unsigned long flags; - unsigned int baud, baudclk; - - baud = uart_get_baud_rate(port, termios, old, 0, 4000000); - baudclk = port->uartclk / baud; - - if (old) - tty_termios_copy_hw(termios, old); - tty_termios_encode_baud_rate(termios, baud, baud); - - spin_lock_irqsave(&port->lock, flags); - uart_update_timeout(port, termios->c_cflag, baud); - altera_uart_writel(port, baudclk, ALTERA_UART_DIVISOR_REG); - spin_unlock_irqrestore(&port->lock, flags); -} - -static void altera_uart_rx_chars(struct altera_uart *pp) -{ - struct uart_port *port = &pp->port; - unsigned char ch, flag; - unsigned short status; - - while ((status = altera_uart_readl(port, ALTERA_UART_STATUS_REG)) & - ALTERA_UART_STATUS_RRDY_MSK) { - ch = altera_uart_readl(port, ALTERA_UART_RXDATA_REG); - flag = TTY_NORMAL; - port->icount.rx++; - - if (status & ALTERA_UART_STATUS_E_MSK) { - altera_uart_writel(port, status, - ALTERA_UART_STATUS_REG); - - if (status & ALTERA_UART_STATUS_BRK_MSK) { - port->icount.brk++; - if (uart_handle_break(port)) - continue; - } else if (status & ALTERA_UART_STATUS_PE_MSK) { - port->icount.parity++; - } else if (status & ALTERA_UART_STATUS_ROE_MSK) { - port->icount.overrun++; - } else if (status & ALTERA_UART_STATUS_FE_MSK) { - port->icount.frame++; - } - - status &= port->read_status_mask; - - if (status & ALTERA_UART_STATUS_BRK_MSK) - flag = TTY_BREAK; - else if (status & ALTERA_UART_STATUS_PE_MSK) - flag = TTY_PARITY; - else if (status & ALTERA_UART_STATUS_FE_MSK) - flag = TTY_FRAME; - } - - if (uart_handle_sysrq_char(port, ch)) - continue; - uart_insert_char(port, status, ALTERA_UART_STATUS_ROE_MSK, ch, - flag); - } - - tty_flip_buffer_push(port->state->port.tty); -} - -static void altera_uart_tx_chars(struct altera_uart *pp) -{ - struct uart_port *port = &pp->port; - struct circ_buf *xmit = &port->state->xmit; - - if (port->x_char) { - /* Send special char - probably flow control */ - altera_uart_writel(port, port->x_char, ALTERA_UART_TXDATA_REG); - port->x_char = 0; - port->icount.tx++; - return; - } - - while (altera_uart_readl(port, ALTERA_UART_STATUS_REG) & - ALTERA_UART_STATUS_TRDY_MSK) { - if (xmit->head == xmit->tail) - break; - altera_uart_writel(port, xmit->buf[xmit->tail], - ALTERA_UART_TXDATA_REG); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (xmit->head == xmit->tail) { - pp->imr &= ~ALTERA_UART_CONTROL_TRDY_MSK; - altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG); - } -} - -static irqreturn_t altera_uart_interrupt(int irq, void *data) -{ - struct uart_port *port = data; - struct altera_uart *pp = container_of(port, struct altera_uart, port); - unsigned int isr; - - isr = altera_uart_readl(port, ALTERA_UART_STATUS_REG) & pp->imr; - - spin_lock(&port->lock); - if (isr & ALTERA_UART_STATUS_RRDY_MSK) - altera_uart_rx_chars(pp); - if (isr & ALTERA_UART_STATUS_TRDY_MSK) - altera_uart_tx_chars(pp); - spin_unlock(&port->lock); - - return IRQ_RETVAL(isr); -} - -static void altera_uart_timer(unsigned long data) -{ - struct uart_port *port = (void *)data; - struct altera_uart *pp = container_of(port, struct altera_uart, port); - - altera_uart_interrupt(0, port); - mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port)); -} - -static void altera_uart_config_port(struct uart_port *port, int flags) -{ - port->type = PORT_ALTERA_UART; - - /* Clear mask, so no surprise interrupts. */ - altera_uart_writel(port, 0, ALTERA_UART_CONTROL_REG); - /* Clear status register */ - altera_uart_writel(port, 0, ALTERA_UART_STATUS_REG); -} - -static int altera_uart_startup(struct uart_port *port) -{ - struct altera_uart *pp = container_of(port, struct altera_uart, port); - unsigned long flags; - int ret; - - if (!port->irq) { - setup_timer(&pp->tmr, altera_uart_timer, (unsigned long)port); - mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port)); - return 0; - } - - ret = request_irq(port->irq, altera_uart_interrupt, IRQF_DISABLED, - DRV_NAME, port); - if (ret) { - pr_err(DRV_NAME ": unable to attach Altera UART %d " - "interrupt vector=%d\n", port->line, port->irq); - return ret; - } - - spin_lock_irqsave(&port->lock, flags); - - /* Enable RX interrupts now */ - pp->imr = ALTERA_UART_CONTROL_RRDY_MSK; - writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG); - - spin_unlock_irqrestore(&port->lock, flags); - - return 0; -} - -static void altera_uart_shutdown(struct uart_port *port) -{ - struct altera_uart *pp = container_of(port, struct altera_uart, port); - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - - /* Disable all interrupts now */ - pp->imr = 0; - writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG); - - spin_unlock_irqrestore(&port->lock, flags); - - if (port->irq) - free_irq(port->irq, port); - else - del_timer_sync(&pp->tmr); -} - -static const char *altera_uart_type(struct uart_port *port) -{ - return (port->type == PORT_ALTERA_UART) ? "Altera UART" : NULL; -} - -static int altera_uart_request_port(struct uart_port *port) -{ - /* UARTs always present */ - return 0; -} - -static void altera_uart_release_port(struct uart_port *port) -{ - /* Nothing to release... */ -} - -static int altera_uart_verify_port(struct uart_port *port, - struct serial_struct *ser) -{ - if ((ser->type != PORT_UNKNOWN) && (ser->type != PORT_ALTERA_UART)) - return -EINVAL; - return 0; -} - -/* - * Define the basic serial functions we support. - */ -static struct uart_ops altera_uart_ops = { - .tx_empty = altera_uart_tx_empty, - .get_mctrl = altera_uart_get_mctrl, - .set_mctrl = altera_uart_set_mctrl, - .start_tx = altera_uart_start_tx, - .stop_tx = altera_uart_stop_tx, - .stop_rx = altera_uart_stop_rx, - .enable_ms = altera_uart_enable_ms, - .break_ctl = altera_uart_break_ctl, - .startup = altera_uart_startup, - .shutdown = altera_uart_shutdown, - .set_termios = altera_uart_set_termios, - .type = altera_uart_type, - .request_port = altera_uart_request_port, - .release_port = altera_uart_release_port, - .config_port = altera_uart_config_port, - .verify_port = altera_uart_verify_port, -}; - -static struct altera_uart altera_uart_ports[CONFIG_SERIAL_ALTERA_UART_MAXPORTS]; - -#if defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE) - -int __init early_altera_uart_setup(struct altera_uart_platform_uart *platp) -{ - struct uart_port *port; - int i; - - for (i = 0; i < CONFIG_SERIAL_ALTERA_UART_MAXPORTS && platp[i].mapbase; i++) { - port = &altera_uart_ports[i].port; - - port->line = i; - port->type = PORT_ALTERA_UART; - port->mapbase = platp[i].mapbase; - port->membase = ioremap(port->mapbase, ALTERA_UART_SIZE); - port->iotype = SERIAL_IO_MEM; - port->irq = platp[i].irq; - port->uartclk = platp[i].uartclk; - port->flags = UPF_BOOT_AUTOCONF; - port->ops = &altera_uart_ops; - port->private_data = platp; - } - - return 0; -} - -static void altera_uart_console_putc(struct uart_port *port, const char c) -{ - while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) & - ALTERA_UART_STATUS_TRDY_MSK)) - cpu_relax(); - - writel(c, port->membase + ALTERA_UART_TXDATA_REG); -} - -static void altera_uart_console_write(struct console *co, const char *s, - unsigned int count) -{ - struct uart_port *port = &(altera_uart_ports + co->index)->port; - - for (; count; count--, s++) { - altera_uart_console_putc(port, *s); - if (*s == '\n') - altera_uart_console_putc(port, '\r'); - } -} - -static int __init altera_uart_console_setup(struct console *co, char *options) -{ - struct uart_port *port; - int baud = CONFIG_SERIAL_ALTERA_UART_BAUDRATE; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - if (co->index < 0 || co->index >= CONFIG_SERIAL_ALTERA_UART_MAXPORTS) - return -EINVAL; - port = &altera_uart_ports[co->index].port; - if (!port->membase) - return -ENODEV; - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - -static struct uart_driver altera_uart_driver; - -static struct console altera_uart_console = { - .name = "ttyAL", - .write = altera_uart_console_write, - .device = uart_console_device, - .setup = altera_uart_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &altera_uart_driver, -}; - -static int __init altera_uart_console_init(void) -{ - register_console(&altera_uart_console); - return 0; -} - -console_initcall(altera_uart_console_init); - -#define ALTERA_UART_CONSOLE (&altera_uart_console) - -#else - -#define ALTERA_UART_CONSOLE NULL - -#endif /* CONFIG_ALTERA_UART_CONSOLE */ - -/* - * Define the altera_uart UART driver structure. - */ -static struct uart_driver altera_uart_driver = { - .owner = THIS_MODULE, - .driver_name = DRV_NAME, - .dev_name = "ttyAL", - .major = SERIAL_ALTERA_MAJOR, - .minor = SERIAL_ALTERA_MINOR, - .nr = CONFIG_SERIAL_ALTERA_UART_MAXPORTS, - .cons = ALTERA_UART_CONSOLE, -}; - -static int __devinit altera_uart_probe(struct platform_device *pdev) -{ - struct altera_uart_platform_uart *platp = pdev->dev.platform_data; - struct uart_port *port; - struct resource *res_mem; - struct resource *res_irq; - int i = pdev->id; - - /* -1 emphasizes that the platform must have one port, no .N suffix */ - if (i == -1) - i = 0; - - if (i >= CONFIG_SERIAL_ALTERA_UART_MAXPORTS) - return -EINVAL; - - port = &altera_uart_ports[i].port; - - res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res_mem) - port->mapbase = res_mem->start; - else if (platp->mapbase) - port->mapbase = platp->mapbase; - else - return -EINVAL; - - res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (res_irq) - port->irq = res_irq->start; - else if (platp->irq) - port->irq = platp->irq; - - port->membase = ioremap(port->mapbase, ALTERA_UART_SIZE); - if (!port->membase) - return -ENOMEM; - - port->line = i; - port->type = PORT_ALTERA_UART; - port->iotype = SERIAL_IO_MEM; - port->uartclk = platp->uartclk; - port->ops = &altera_uart_ops; - port->flags = UPF_BOOT_AUTOCONF; - port->private_data = platp; - - uart_add_one_port(&altera_uart_driver, port); - - return 0; -} - -static int __devexit altera_uart_remove(struct platform_device *pdev) -{ - struct uart_port *port = &altera_uart_ports[pdev->id].port; - - uart_remove_one_port(&altera_uart_driver, port); - return 0; -} - -static struct platform_driver altera_uart_platform_driver = { - .probe = altera_uart_probe, - .remove = __devexit_p(altera_uart_remove), - .driver = { - .name = DRV_NAME, - .owner = THIS_MODULE, - .pm = NULL, - }, -}; - -static int __init altera_uart_init(void) -{ - int rc; - - rc = uart_register_driver(&altera_uart_driver); - if (rc) - return rc; - rc = platform_driver_register(&altera_uart_platform_driver); - if (rc) { - uart_unregister_driver(&altera_uart_driver); - return rc; - } - return 0; -} - -static void __exit altera_uart_exit(void) -{ - platform_driver_unregister(&altera_uart_platform_driver); - uart_unregister_driver(&altera_uart_driver); -} - -module_init(altera_uart_init); -module_exit(altera_uart_exit); - -MODULE_DESCRIPTION("Altera UART driver"); -MODULE_AUTHOR("Thomas Chou <thomas@wytron.com.tw>"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:" DRV_NAME); -MODULE_ALIAS_CHARDEV_MAJOR(SERIAL_ALTERA_MAJOR); diff --git a/drivers/serial/amba-pl010.c b/drivers/serial/amba-pl010.c deleted file mode 100644 index 2904aa044126..000000000000 --- a/drivers/serial/amba-pl010.c +++ /dev/null @@ -1,825 +0,0 @@ -/* - * linux/drivers/char/amba.c - * - * Driver for AMBA serial ports - * - * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. - * - * Copyright 1999 ARM Limited - * Copyright (C) 2000 Deep Blue Solutions Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * This is a generic driver for ARM AMBA-type serial ports. They - * have a lot of 16550-like features, but are not register compatible. - * Note that although they do have CTS, DCD and DSR inputs, they do - * not have an RI input, nor do they have DTR or RTS outputs. If - * required, these have to be supplied via some other means (eg, GPIO) - * and hooked into this driver. - */ - -#if defined(CONFIG_SERIAL_AMBA_PL010_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/device.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/serial.h> -#include <linux/amba/bus.h> -#include <linux/amba/serial.h> -#include <linux/clk.h> -#include <linux/slab.h> - -#include <asm/io.h> - -#define UART_NR 8 - -#define SERIAL_AMBA_MAJOR 204 -#define SERIAL_AMBA_MINOR 16 -#define SERIAL_AMBA_NR UART_NR - -#define AMBA_ISR_PASS_LIMIT 256 - -#define UART_RX_DATA(s) (((s) & UART01x_FR_RXFE) == 0) -#define UART_TX_READY(s) (((s) & UART01x_FR_TXFF) == 0) - -#define UART_DUMMY_RSR_RX 256 -#define UART_PORT_SIZE 64 - -/* - * We wrap our port structure around the generic uart_port. - */ -struct uart_amba_port { - struct uart_port port; - struct clk *clk; - struct amba_device *dev; - struct amba_pl010_data *data; - unsigned int old_status; -}; - -static void pl010_stop_tx(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned int cr; - - cr = readb(uap->port.membase + UART010_CR); - cr &= ~UART010_CR_TIE; - writel(cr, uap->port.membase + UART010_CR); -} - -static void pl010_start_tx(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned int cr; - - cr = readb(uap->port.membase + UART010_CR); - cr |= UART010_CR_TIE; - writel(cr, uap->port.membase + UART010_CR); -} - -static void pl010_stop_rx(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned int cr; - - cr = readb(uap->port.membase + UART010_CR); - cr &= ~(UART010_CR_RIE | UART010_CR_RTIE); - writel(cr, uap->port.membase + UART010_CR); -} - -static void pl010_enable_ms(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned int cr; - - cr = readb(uap->port.membase + UART010_CR); - cr |= UART010_CR_MSIE; - writel(cr, uap->port.membase + UART010_CR); -} - -static void pl010_rx_chars(struct uart_amba_port *uap) -{ - struct tty_struct *tty = uap->port.state->port.tty; - unsigned int status, ch, flag, rsr, max_count = 256; - - status = readb(uap->port.membase + UART01x_FR); - while (UART_RX_DATA(status) && max_count--) { - ch = readb(uap->port.membase + UART01x_DR); - flag = TTY_NORMAL; - - uap->port.icount.rx++; - - /* - * Note that the error handling code is - * out of the main execution path - */ - rsr = readb(uap->port.membase + UART01x_RSR) | UART_DUMMY_RSR_RX; - if (unlikely(rsr & UART01x_RSR_ANY)) { - writel(0, uap->port.membase + UART01x_ECR); - - if (rsr & UART01x_RSR_BE) { - rsr &= ~(UART01x_RSR_FE | UART01x_RSR_PE); - uap->port.icount.brk++; - if (uart_handle_break(&uap->port)) - goto ignore_char; - } else if (rsr & UART01x_RSR_PE) - uap->port.icount.parity++; - else if (rsr & UART01x_RSR_FE) - uap->port.icount.frame++; - if (rsr & UART01x_RSR_OE) - uap->port.icount.overrun++; - - rsr &= uap->port.read_status_mask; - - if (rsr & UART01x_RSR_BE) - flag = TTY_BREAK; - else if (rsr & UART01x_RSR_PE) - flag = TTY_PARITY; - else if (rsr & UART01x_RSR_FE) - flag = TTY_FRAME; - } - - if (uart_handle_sysrq_char(&uap->port, ch)) - goto ignore_char; - - uart_insert_char(&uap->port, rsr, UART01x_RSR_OE, ch, flag); - - ignore_char: - status = readb(uap->port.membase + UART01x_FR); - } - spin_unlock(&uap->port.lock); - tty_flip_buffer_push(tty); - spin_lock(&uap->port.lock); -} - -static void pl010_tx_chars(struct uart_amba_port *uap) -{ - struct circ_buf *xmit = &uap->port.state->xmit; - int count; - - if (uap->port.x_char) { - writel(uap->port.x_char, uap->port.membase + UART01x_DR); - uap->port.icount.tx++; - uap->port.x_char = 0; - return; - } - if (uart_circ_empty(xmit) || uart_tx_stopped(&uap->port)) { - pl010_stop_tx(&uap->port); - return; - } - - count = uap->port.fifosize >> 1; - do { - writel(xmit->buf[xmit->tail], uap->port.membase + UART01x_DR); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - uap->port.icount.tx++; - if (uart_circ_empty(xmit)) - break; - } while (--count > 0); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&uap->port); - - if (uart_circ_empty(xmit)) - pl010_stop_tx(&uap->port); -} - -static void pl010_modem_status(struct uart_amba_port *uap) -{ - unsigned int status, delta; - - writel(0, uap->port.membase + UART010_ICR); - - status = readb(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY; - - delta = status ^ uap->old_status; - uap->old_status = status; - - if (!delta) - return; - - if (delta & UART01x_FR_DCD) - uart_handle_dcd_change(&uap->port, status & UART01x_FR_DCD); - - if (delta & UART01x_FR_DSR) - uap->port.icount.dsr++; - - if (delta & UART01x_FR_CTS) - uart_handle_cts_change(&uap->port, status & UART01x_FR_CTS); - - wake_up_interruptible(&uap->port.state->port.delta_msr_wait); -} - -static irqreturn_t pl010_int(int irq, void *dev_id) -{ - struct uart_amba_port *uap = dev_id; - unsigned int status, pass_counter = AMBA_ISR_PASS_LIMIT; - int handled = 0; - - spin_lock(&uap->port.lock); - - status = readb(uap->port.membase + UART010_IIR); - if (status) { - do { - if (status & (UART010_IIR_RTIS | UART010_IIR_RIS)) - pl010_rx_chars(uap); - if (status & UART010_IIR_MIS) - pl010_modem_status(uap); - if (status & UART010_IIR_TIS) - pl010_tx_chars(uap); - - if (pass_counter-- == 0) - break; - - status = readb(uap->port.membase + UART010_IIR); - } while (status & (UART010_IIR_RTIS | UART010_IIR_RIS | - UART010_IIR_TIS)); - handled = 1; - } - - spin_unlock(&uap->port.lock); - - return IRQ_RETVAL(handled); -} - -static unsigned int pl010_tx_empty(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned int status = readb(uap->port.membase + UART01x_FR); - return status & UART01x_FR_BUSY ? 0 : TIOCSER_TEMT; -} - -static unsigned int pl010_get_mctrl(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned int result = 0; - unsigned int status; - - status = readb(uap->port.membase + UART01x_FR); - if (status & UART01x_FR_DCD) - result |= TIOCM_CAR; - if (status & UART01x_FR_DSR) - result |= TIOCM_DSR; - if (status & UART01x_FR_CTS) - result |= TIOCM_CTS; - - return result; -} - -static void pl010_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - - if (uap->data) - uap->data->set_mctrl(uap->dev, uap->port.membase, mctrl); -} - -static void pl010_break_ctl(struct uart_port *port, int break_state) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned long flags; - unsigned int lcr_h; - - spin_lock_irqsave(&uap->port.lock, flags); - lcr_h = readb(uap->port.membase + UART010_LCRH); - if (break_state == -1) - lcr_h |= UART01x_LCRH_BRK; - else - lcr_h &= ~UART01x_LCRH_BRK; - writel(lcr_h, uap->port.membase + UART010_LCRH); - spin_unlock_irqrestore(&uap->port.lock, flags); -} - -static int pl010_startup(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - int retval; - - /* - * Try to enable the clock producer. - */ - retval = clk_enable(uap->clk); - if (retval) - goto out; - - uap->port.uartclk = clk_get_rate(uap->clk); - - /* - * Allocate the IRQ - */ - retval = request_irq(uap->port.irq, pl010_int, 0, "uart-pl010", uap); - if (retval) - goto clk_dis; - - /* - * initialise the old status of the modem signals - */ - uap->old_status = readb(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY; - - /* - * Finally, enable interrupts - */ - writel(UART01x_CR_UARTEN | UART010_CR_RIE | UART010_CR_RTIE, - uap->port.membase + UART010_CR); - - return 0; - - clk_dis: - clk_disable(uap->clk); - out: - return retval; -} - -static void pl010_shutdown(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - - /* - * Free the interrupt - */ - free_irq(uap->port.irq, uap); - - /* - * disable all interrupts, disable the port - */ - writel(0, uap->port.membase + UART010_CR); - - /* disable break condition and fifos */ - writel(readb(uap->port.membase + UART010_LCRH) & - ~(UART01x_LCRH_BRK | UART01x_LCRH_FEN), - uap->port.membase + UART010_LCRH); - - /* - * Shut down the clock producer - */ - clk_disable(uap->clk); -} - -static void -pl010_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned int lcr_h, old_cr; - unsigned long flags; - unsigned int baud, quot; - - /* - * Ask the core to calculate the divisor for us. - */ - baud = uart_get_baud_rate(port, termios, old, 0, uap->port.uartclk/16); - quot = uart_get_divisor(port, baud); - - switch (termios->c_cflag & CSIZE) { - case CS5: - lcr_h = UART01x_LCRH_WLEN_5; - break; - case CS6: - lcr_h = UART01x_LCRH_WLEN_6; - break; - case CS7: - lcr_h = UART01x_LCRH_WLEN_7; - break; - default: // CS8 - lcr_h = UART01x_LCRH_WLEN_8; - break; - } - if (termios->c_cflag & CSTOPB) - lcr_h |= UART01x_LCRH_STP2; - if (termios->c_cflag & PARENB) { - lcr_h |= UART01x_LCRH_PEN; - if (!(termios->c_cflag & PARODD)) - lcr_h |= UART01x_LCRH_EPS; - } - if (uap->port.fifosize > 1) - lcr_h |= UART01x_LCRH_FEN; - - spin_lock_irqsave(&uap->port.lock, flags); - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - uap->port.read_status_mask = UART01x_RSR_OE; - if (termios->c_iflag & INPCK) - uap->port.read_status_mask |= UART01x_RSR_FE | UART01x_RSR_PE; - if (termios->c_iflag & (BRKINT | PARMRK)) - uap->port.read_status_mask |= UART01x_RSR_BE; - - /* - * Characters to ignore - */ - uap->port.ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - uap->port.ignore_status_mask |= UART01x_RSR_FE | UART01x_RSR_PE; - if (termios->c_iflag & IGNBRK) { - uap->port.ignore_status_mask |= UART01x_RSR_BE; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - uap->port.ignore_status_mask |= UART01x_RSR_OE; - } - - /* - * Ignore all characters if CREAD is not set. - */ - if ((termios->c_cflag & CREAD) == 0) - uap->port.ignore_status_mask |= UART_DUMMY_RSR_RX; - - /* first, disable everything */ - old_cr = readb(uap->port.membase + UART010_CR) & ~UART010_CR_MSIE; - - if (UART_ENABLE_MS(port, termios->c_cflag)) - old_cr |= UART010_CR_MSIE; - - writel(0, uap->port.membase + UART010_CR); - - /* Set baud rate */ - quot -= 1; - writel((quot & 0xf00) >> 8, uap->port.membase + UART010_LCRM); - writel(quot & 0xff, uap->port.membase + UART010_LCRL); - - /* - * ----------v----------v----------v----------v----- - * NOTE: MUST BE WRITTEN AFTER UARTLCR_M & UARTLCR_L - * ----------^----------^----------^----------^----- - */ - writel(lcr_h, uap->port.membase + UART010_LCRH); - writel(old_cr, uap->port.membase + UART010_CR); - - spin_unlock_irqrestore(&uap->port.lock, flags); -} - -static void pl010_set_ldisc(struct uart_port *port, int new) -{ - if (new == N_PPS) { - port->flags |= UPF_HARDPPS_CD; - pl010_enable_ms(port); - } else - port->flags &= ~UPF_HARDPPS_CD; -} - -static const char *pl010_type(struct uart_port *port) -{ - return port->type == PORT_AMBA ? "AMBA" : NULL; -} - -/* - * Release the memory region(s) being used by 'port' - */ -static void pl010_release_port(struct uart_port *port) -{ - release_mem_region(port->mapbase, UART_PORT_SIZE); -} - -/* - * Request the memory region(s) being used by 'port' - */ -static int pl010_request_port(struct uart_port *port) -{ - return request_mem_region(port->mapbase, UART_PORT_SIZE, "uart-pl010") - != NULL ? 0 : -EBUSY; -} - -/* - * Configure/autoconfigure the port. - */ -static void pl010_config_port(struct uart_port *port, int flags) -{ - if (flags & UART_CONFIG_TYPE) { - port->type = PORT_AMBA; - pl010_request_port(port); - } -} - -/* - * verify the new serial_struct (for TIOCSSERIAL). - */ -static int pl010_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - int ret = 0; - if (ser->type != PORT_UNKNOWN && ser->type != PORT_AMBA) - ret = -EINVAL; - if (ser->irq < 0 || ser->irq >= nr_irqs) - ret = -EINVAL; - if (ser->baud_base < 9600) - ret = -EINVAL; - return ret; -} - -static struct uart_ops amba_pl010_pops = { - .tx_empty = pl010_tx_empty, - .set_mctrl = pl010_set_mctrl, - .get_mctrl = pl010_get_mctrl, - .stop_tx = pl010_stop_tx, - .start_tx = pl010_start_tx, - .stop_rx = pl010_stop_rx, - .enable_ms = pl010_enable_ms, - .break_ctl = pl010_break_ctl, - .startup = pl010_startup, - .shutdown = pl010_shutdown, - .set_termios = pl010_set_termios, - .set_ldisc = pl010_set_ldisc, - .type = pl010_type, - .release_port = pl010_release_port, - .request_port = pl010_request_port, - .config_port = pl010_config_port, - .verify_port = pl010_verify_port, -}; - -static struct uart_amba_port *amba_ports[UART_NR]; - -#ifdef CONFIG_SERIAL_AMBA_PL010_CONSOLE - -static void pl010_console_putchar(struct uart_port *port, int ch) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned int status; - - do { - status = readb(uap->port.membase + UART01x_FR); - barrier(); - } while (!UART_TX_READY(status)); - writel(ch, uap->port.membase + UART01x_DR); -} - -static void -pl010_console_write(struct console *co, const char *s, unsigned int count) -{ - struct uart_amba_port *uap = amba_ports[co->index]; - unsigned int status, old_cr; - - clk_enable(uap->clk); - - /* - * First save the CR then disable the interrupts - */ - old_cr = readb(uap->port.membase + UART010_CR); - writel(UART01x_CR_UARTEN, uap->port.membase + UART010_CR); - - uart_console_write(&uap->port, s, count, pl010_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore the TCR - */ - do { - status = readb(uap->port.membase + UART01x_FR); - barrier(); - } while (status & UART01x_FR_BUSY); - writel(old_cr, uap->port.membase + UART010_CR); - - clk_disable(uap->clk); -} - -static void __init -pl010_console_get_options(struct uart_amba_port *uap, int *baud, - int *parity, int *bits) -{ - if (readb(uap->port.membase + UART010_CR) & UART01x_CR_UARTEN) { - unsigned int lcr_h, quot; - lcr_h = readb(uap->port.membase + UART010_LCRH); - - *parity = 'n'; - if (lcr_h & UART01x_LCRH_PEN) { - if (lcr_h & UART01x_LCRH_EPS) - *parity = 'e'; - else - *parity = 'o'; - } - - if ((lcr_h & 0x60) == UART01x_LCRH_WLEN_7) - *bits = 7; - else - *bits = 8; - - quot = readb(uap->port.membase + UART010_LCRL) | - readb(uap->port.membase + UART010_LCRM) << 8; - *baud = uap->port.uartclk / (16 * (quot + 1)); - } -} - -static int __init pl010_console_setup(struct console *co, char *options) -{ - struct uart_amba_port *uap; - int baud = 38400; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - if (co->index >= UART_NR) - co->index = 0; - uap = amba_ports[co->index]; - if (!uap) - return -ENODEV; - - uap->port.uartclk = clk_get_rate(uap->clk); - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - else - pl010_console_get_options(uap, &baud, &parity, &bits); - - return uart_set_options(&uap->port, co, baud, parity, bits, flow); -} - -static struct uart_driver amba_reg; -static struct console amba_console = { - .name = "ttyAM", - .write = pl010_console_write, - .device = uart_console_device, - .setup = pl010_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &amba_reg, -}; - -#define AMBA_CONSOLE &amba_console -#else -#define AMBA_CONSOLE NULL -#endif - -static struct uart_driver amba_reg = { - .owner = THIS_MODULE, - .driver_name = "ttyAM", - .dev_name = "ttyAM", - .major = SERIAL_AMBA_MAJOR, - .minor = SERIAL_AMBA_MINOR, - .nr = UART_NR, - .cons = AMBA_CONSOLE, -}; - -static int pl010_probe(struct amba_device *dev, struct amba_id *id) -{ - struct uart_amba_port *uap; - void __iomem *base; - int i, ret; - - for (i = 0; i < ARRAY_SIZE(amba_ports); i++) - if (amba_ports[i] == NULL) - break; - - if (i == ARRAY_SIZE(amba_ports)) { - ret = -EBUSY; - goto out; - } - - uap = kzalloc(sizeof(struct uart_amba_port), GFP_KERNEL); - if (!uap) { - ret = -ENOMEM; - goto out; - } - - base = ioremap(dev->res.start, resource_size(&dev->res)); - if (!base) { - ret = -ENOMEM; - goto free; - } - - uap->clk = clk_get(&dev->dev, NULL); - if (IS_ERR(uap->clk)) { - ret = PTR_ERR(uap->clk); - goto unmap; - } - - uap->port.dev = &dev->dev; - uap->port.mapbase = dev->res.start; - uap->port.membase = base; - uap->port.iotype = UPIO_MEM; - uap->port.irq = dev->irq[0]; - uap->port.fifosize = 16; - uap->port.ops = &amba_pl010_pops; - uap->port.flags = UPF_BOOT_AUTOCONF; - uap->port.line = i; - uap->dev = dev; - uap->data = dev->dev.platform_data; - - amba_ports[i] = uap; - - amba_set_drvdata(dev, uap); - ret = uart_add_one_port(&amba_reg, &uap->port); - if (ret) { - amba_set_drvdata(dev, NULL); - amba_ports[i] = NULL; - clk_put(uap->clk); - unmap: - iounmap(base); - free: - kfree(uap); - } - out: - return ret; -} - -static int pl010_remove(struct amba_device *dev) -{ - struct uart_amba_port *uap = amba_get_drvdata(dev); - int i; - - amba_set_drvdata(dev, NULL); - - uart_remove_one_port(&amba_reg, &uap->port); - - for (i = 0; i < ARRAY_SIZE(amba_ports); i++) - if (amba_ports[i] == uap) - amba_ports[i] = NULL; - - iounmap(uap->port.membase); - clk_put(uap->clk); - kfree(uap); - return 0; -} - -static int pl010_suspend(struct amba_device *dev, pm_message_t state) -{ - struct uart_amba_port *uap = amba_get_drvdata(dev); - - if (uap) - uart_suspend_port(&amba_reg, &uap->port); - - return 0; -} - -static int pl010_resume(struct amba_device *dev) -{ - struct uart_amba_port *uap = amba_get_drvdata(dev); - - if (uap) - uart_resume_port(&amba_reg, &uap->port); - - return 0; -} - -static struct amba_id pl010_ids[] = { - { - .id = 0x00041010, - .mask = 0x000fffff, - }, - { 0, 0 }, -}; - -static struct amba_driver pl010_driver = { - .drv = { - .name = "uart-pl010", - }, - .id_table = pl010_ids, - .probe = pl010_probe, - .remove = pl010_remove, - .suspend = pl010_suspend, - .resume = pl010_resume, -}; - -static int __init pl010_init(void) -{ - int ret; - - printk(KERN_INFO "Serial: AMBA driver\n"); - - ret = uart_register_driver(&amba_reg); - if (ret == 0) { - ret = amba_driver_register(&pl010_driver); - if (ret) - uart_unregister_driver(&amba_reg); - } - return ret; -} - -static void __exit pl010_exit(void) -{ - amba_driver_unregister(&pl010_driver); - uart_unregister_driver(&amba_reg); -} - -module_init(pl010_init); -module_exit(pl010_exit); - -MODULE_AUTHOR("ARM Ltd/Deep Blue Solutions Ltd"); -MODULE_DESCRIPTION("ARM AMBA serial port driver"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/amba-pl011.c b/drivers/serial/amba-pl011.c deleted file mode 100644 index e76d7d000128..000000000000 --- a/drivers/serial/amba-pl011.c +++ /dev/null @@ -1,1519 +0,0 @@ -/* - * linux/drivers/char/amba.c - * - * Driver for AMBA serial ports - * - * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. - * - * Copyright 1999 ARM Limited - * Copyright (C) 2000 Deep Blue Solutions Ltd. - * Copyright (C) 2010 ST-Ericsson SA - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * This is a generic driver for ARM AMBA-type serial ports. They - * have a lot of 16550-like features, but are not register compatible. - * Note that although they do have CTS, DCD and DSR inputs, they do - * not have an RI input, nor do they have DTR or RTS outputs. If - * required, these have to be supplied via some other means (eg, GPIO) - * and hooked into this driver. - */ - -#if defined(CONFIG_SERIAL_AMBA_PL011_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/device.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/serial.h> -#include <linux/amba/bus.h> -#include <linux/amba/serial.h> -#include <linux/clk.h> -#include <linux/slab.h> -#include <linux/dmaengine.h> -#include <linux/dma-mapping.h> -#include <linux/scatterlist.h> - -#include <asm/io.h> -#include <asm/sizes.h> - -#define UART_NR 14 - -#define SERIAL_AMBA_MAJOR 204 -#define SERIAL_AMBA_MINOR 64 -#define SERIAL_AMBA_NR UART_NR - -#define AMBA_ISR_PASS_LIMIT 256 - -#define UART_DR_ERROR (UART011_DR_OE|UART011_DR_BE|UART011_DR_PE|UART011_DR_FE) -#define UART_DUMMY_DR_RX (1 << 16) - -/* There is by now at least one vendor with differing details, so handle it */ -struct vendor_data { - unsigned int ifls; - unsigned int fifosize; - unsigned int lcrh_tx; - unsigned int lcrh_rx; - bool oversampling; - bool dma_threshold; -}; - -static struct vendor_data vendor_arm = { - .ifls = UART011_IFLS_RX4_8|UART011_IFLS_TX4_8, - .fifosize = 16, - .lcrh_tx = UART011_LCRH, - .lcrh_rx = UART011_LCRH, - .oversampling = false, - .dma_threshold = false, -}; - -static struct vendor_data vendor_st = { - .ifls = UART011_IFLS_RX_HALF|UART011_IFLS_TX_HALF, - .fifosize = 64, - .lcrh_tx = ST_UART011_LCRH_TX, - .lcrh_rx = ST_UART011_LCRH_RX, - .oversampling = true, - .dma_threshold = true, -}; - -/* Deals with DMA transactions */ -struct pl011_dmatx_data { - struct dma_chan *chan; - struct scatterlist sg; - char *buf; - bool queued; -}; - -/* - * We wrap our port structure around the generic uart_port. - */ -struct uart_amba_port { - struct uart_port port; - struct clk *clk; - const struct vendor_data *vendor; - unsigned int dmacr; /* dma control reg */ - unsigned int im; /* interrupt mask */ - unsigned int old_status; - unsigned int fifosize; /* vendor-specific */ - unsigned int lcrh_tx; /* vendor-specific */ - unsigned int lcrh_rx; /* vendor-specific */ - bool autorts; - char type[12]; -#ifdef CONFIG_DMA_ENGINE - /* DMA stuff */ - bool using_dma; - struct pl011_dmatx_data dmatx; -#endif -}; - -/* - * All the DMA operation mode stuff goes inside this ifdef. - * This assumes that you have a generic DMA device interface, - * no custom DMA interfaces are supported. - */ -#ifdef CONFIG_DMA_ENGINE - -#define PL011_DMA_BUFFER_SIZE PAGE_SIZE - -static void pl011_dma_probe_initcall(struct uart_amba_port *uap) -{ - /* DMA is the sole user of the platform data right now */ - struct amba_pl011_data *plat = uap->port.dev->platform_data; - struct dma_slave_config tx_conf = { - .dst_addr = uap->port.mapbase + UART01x_DR, - .dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE, - .direction = DMA_TO_DEVICE, - .dst_maxburst = uap->fifosize >> 1, - }; - struct dma_chan *chan; - dma_cap_mask_t mask; - - /* We need platform data */ - if (!plat || !plat->dma_filter) { - dev_info(uap->port.dev, "no DMA platform data\n"); - return; - } - - /* Try to acquire a generic DMA engine slave channel */ - dma_cap_zero(mask); - dma_cap_set(DMA_SLAVE, mask); - - chan = dma_request_channel(mask, plat->dma_filter, plat->dma_tx_param); - if (!chan) { - dev_err(uap->port.dev, "no TX DMA channel!\n"); - return; - } - - dmaengine_slave_config(chan, &tx_conf); - uap->dmatx.chan = chan; - - dev_info(uap->port.dev, "DMA channel TX %s\n", - dma_chan_name(uap->dmatx.chan)); -} - -#ifndef MODULE -/* - * Stack up the UARTs and let the above initcall be done at device - * initcall time, because the serial driver is called as an arch - * initcall, and at this time the DMA subsystem is not yet registered. - * At this point the driver will switch over to using DMA where desired. - */ -struct dma_uap { - struct list_head node; - struct uart_amba_port *uap; -}; - -static LIST_HEAD(pl011_dma_uarts); - -static int __init pl011_dma_initcall(void) -{ - struct list_head *node, *tmp; - - list_for_each_safe(node, tmp, &pl011_dma_uarts) { - struct dma_uap *dmau = list_entry(node, struct dma_uap, node); - pl011_dma_probe_initcall(dmau->uap); - list_del(node); - kfree(dmau); - } - return 0; -} - -device_initcall(pl011_dma_initcall); - -static void pl011_dma_probe(struct uart_amba_port *uap) -{ - struct dma_uap *dmau = kzalloc(sizeof(struct dma_uap), GFP_KERNEL); - if (dmau) { - dmau->uap = uap; - list_add_tail(&dmau->node, &pl011_dma_uarts); - } -} -#else -static void pl011_dma_probe(struct uart_amba_port *uap) -{ - pl011_dma_probe_initcall(uap); -} -#endif - -static void pl011_dma_remove(struct uart_amba_port *uap) -{ - /* TODO: remove the initcall if it has not yet executed */ - if (uap->dmatx.chan) - dma_release_channel(uap->dmatx.chan); -} - - -/* Forward declare this for the refill routine */ -static int pl011_dma_tx_refill(struct uart_amba_port *uap); - -/* - * The current DMA TX buffer has been sent. - * Try to queue up another DMA buffer. - */ -static void pl011_dma_tx_callback(void *data) -{ - struct uart_amba_port *uap = data; - struct pl011_dmatx_data *dmatx = &uap->dmatx; - unsigned long flags; - u16 dmacr; - - spin_lock_irqsave(&uap->port.lock, flags); - if (uap->dmatx.queued) - dma_unmap_sg(dmatx->chan->device->dev, &dmatx->sg, 1, - DMA_TO_DEVICE); - - dmacr = uap->dmacr; - uap->dmacr = dmacr & ~UART011_TXDMAE; - writew(uap->dmacr, uap->port.membase + UART011_DMACR); - - /* - * If TX DMA was disabled, it means that we've stopped the DMA for - * some reason (eg, XOFF received, or we want to send an X-char.) - * - * Note: we need to be careful here of a potential race between DMA - * and the rest of the driver - if the driver disables TX DMA while - * a TX buffer completing, we must update the tx queued status to - * get further refills (hence we check dmacr). - */ - if (!(dmacr & UART011_TXDMAE) || uart_tx_stopped(&uap->port) || - uart_circ_empty(&uap->port.state->xmit)) { - uap->dmatx.queued = false; - spin_unlock_irqrestore(&uap->port.lock, flags); - return; - } - - if (pl011_dma_tx_refill(uap) <= 0) { - /* - * We didn't queue a DMA buffer for some reason, but we - * have data pending to be sent. Re-enable the TX IRQ. - */ - uap->im |= UART011_TXIM; - writew(uap->im, uap->port.membase + UART011_IMSC); - } - spin_unlock_irqrestore(&uap->port.lock, flags); -} - -/* - * Try to refill the TX DMA buffer. - * Locking: called with port lock held and IRQs disabled. - * Returns: - * 1 if we queued up a TX DMA buffer. - * 0 if we didn't want to handle this by DMA - * <0 on error - */ -static int pl011_dma_tx_refill(struct uart_amba_port *uap) -{ - struct pl011_dmatx_data *dmatx = &uap->dmatx; - struct dma_chan *chan = dmatx->chan; - struct dma_device *dma_dev = chan->device; - struct dma_async_tx_descriptor *desc; - struct circ_buf *xmit = &uap->port.state->xmit; - unsigned int count; - - /* - * Try to avoid the overhead involved in using DMA if the - * transaction fits in the first half of the FIFO, by using - * the standard interrupt handling. This ensures that we - * issue a uart_write_wakeup() at the appropriate time. - */ - count = uart_circ_chars_pending(xmit); - if (count < (uap->fifosize >> 1)) { - uap->dmatx.queued = false; - return 0; - } - - /* - * Bodge: don't send the last character by DMA, as this - * will prevent XON from notifying us to restart DMA. - */ - count -= 1; - - /* Else proceed to copy the TX chars to the DMA buffer and fire DMA */ - if (count > PL011_DMA_BUFFER_SIZE) - count = PL011_DMA_BUFFER_SIZE; - - if (xmit->tail < xmit->head) - memcpy(&dmatx->buf[0], &xmit->buf[xmit->tail], count); - else { - size_t first = UART_XMIT_SIZE - xmit->tail; - size_t second = xmit->head; - - memcpy(&dmatx->buf[0], &xmit->buf[xmit->tail], first); - if (second) - memcpy(&dmatx->buf[first], &xmit->buf[0], second); - } - - dmatx->sg.length = count; - - if (dma_map_sg(dma_dev->dev, &dmatx->sg, 1, DMA_TO_DEVICE) != 1) { - uap->dmatx.queued = false; - dev_dbg(uap->port.dev, "unable to map TX DMA\n"); - return -EBUSY; - } - - desc = dma_dev->device_prep_slave_sg(chan, &dmatx->sg, 1, DMA_TO_DEVICE, - DMA_PREP_INTERRUPT | DMA_CTRL_ACK); - if (!desc) { - dma_unmap_sg(dma_dev->dev, &dmatx->sg, 1, DMA_TO_DEVICE); - uap->dmatx.queued = false; - /* - * If DMA cannot be used right now, we complete this - * transaction via IRQ and let the TTY layer retry. - */ - dev_dbg(uap->port.dev, "TX DMA busy\n"); - return -EBUSY; - } - - /* Some data to go along to the callback */ - desc->callback = pl011_dma_tx_callback; - desc->callback_param = uap; - - /* All errors should happen at prepare time */ - dmaengine_submit(desc); - - /* Fire the DMA transaction */ - dma_dev->device_issue_pending(chan); - - uap->dmacr |= UART011_TXDMAE; - writew(uap->dmacr, uap->port.membase + UART011_DMACR); - uap->dmatx.queued = true; - - /* - * Now we know that DMA will fire, so advance the ring buffer - * with the stuff we just dispatched. - */ - xmit->tail = (xmit->tail + count) & (UART_XMIT_SIZE - 1); - uap->port.icount.tx += count; - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&uap->port); - - return 1; -} - -/* - * We received a transmit interrupt without a pending X-char but with - * pending characters. - * Locking: called with port lock held and IRQs disabled. - * Returns: - * false if we want to use PIO to transmit - * true if we queued a DMA buffer - */ -static bool pl011_dma_tx_irq(struct uart_amba_port *uap) -{ - if (!uap->using_dma) - return false; - - /* - * If we already have a TX buffer queued, but received a - * TX interrupt, it will be because we've just sent an X-char. - * Ensure the TX DMA is enabled and the TX IRQ is disabled. - */ - if (uap->dmatx.queued) { - uap->dmacr |= UART011_TXDMAE; - writew(uap->dmacr, uap->port.membase + UART011_DMACR); - uap->im &= ~UART011_TXIM; - writew(uap->im, uap->port.membase + UART011_IMSC); - return true; - } - - /* - * We don't have a TX buffer queued, so try to queue one. - * If we succesfully queued a buffer, mask the TX IRQ. - */ - if (pl011_dma_tx_refill(uap) > 0) { - uap->im &= ~UART011_TXIM; - writew(uap->im, uap->port.membase + UART011_IMSC); - return true; - } - return false; -} - -/* - * Stop the DMA transmit (eg, due to received XOFF). - * Locking: called with port lock held and IRQs disabled. - */ -static inline void pl011_dma_tx_stop(struct uart_amba_port *uap) -{ - if (uap->dmatx.queued) { - uap->dmacr &= ~UART011_TXDMAE; - writew(uap->dmacr, uap->port.membase + UART011_DMACR); - } -} - -/* - * Try to start a DMA transmit, or in the case of an XON/OFF - * character queued for send, try to get that character out ASAP. - * Locking: called with port lock held and IRQs disabled. - * Returns: - * false if we want the TX IRQ to be enabled - * true if we have a buffer queued - */ -static inline bool pl011_dma_tx_start(struct uart_amba_port *uap) -{ - u16 dmacr; - - if (!uap->using_dma) - return false; - - if (!uap->port.x_char) { - /* no X-char, try to push chars out in DMA mode */ - bool ret = true; - - if (!uap->dmatx.queued) { - if (pl011_dma_tx_refill(uap) > 0) { - uap->im &= ~UART011_TXIM; - ret = true; - } else { - uap->im |= UART011_TXIM; - ret = false; - } - writew(uap->im, uap->port.membase + UART011_IMSC); - } else if (!(uap->dmacr & UART011_TXDMAE)) { - uap->dmacr |= UART011_TXDMAE; - writew(uap->dmacr, - uap->port.membase + UART011_DMACR); - } - return ret; - } - - /* - * We have an X-char to send. Disable DMA to prevent it loading - * the TX fifo, and then see if we can stuff it into the FIFO. - */ - dmacr = uap->dmacr; - uap->dmacr &= ~UART011_TXDMAE; - writew(uap->dmacr, uap->port.membase + UART011_DMACR); - - if (readw(uap->port.membase + UART01x_FR) & UART01x_FR_TXFF) { - /* - * No space in the FIFO, so enable the transmit interrupt - * so we know when there is space. Note that once we've - * loaded the character, we should just re-enable DMA. - */ - return false; - } - - writew(uap->port.x_char, uap->port.membase + UART01x_DR); - uap->port.icount.tx++; - uap->port.x_char = 0; - - /* Success - restore the DMA state */ - uap->dmacr = dmacr; - writew(dmacr, uap->port.membase + UART011_DMACR); - - return true; -} - -/* - * Flush the transmit buffer. - * Locking: called with port lock held and IRQs disabled. - */ -static void pl011_dma_flush_buffer(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - - if (!uap->using_dma) - return; - - /* Avoid deadlock with the DMA engine callback */ - spin_unlock(&uap->port.lock); - dmaengine_terminate_all(uap->dmatx.chan); - spin_lock(&uap->port.lock); - if (uap->dmatx.queued) { - dma_unmap_sg(uap->dmatx.chan->device->dev, &uap->dmatx.sg, 1, - DMA_TO_DEVICE); - uap->dmatx.queued = false; - uap->dmacr &= ~UART011_TXDMAE; - writew(uap->dmacr, uap->port.membase + UART011_DMACR); - } -} - - -static void pl011_dma_startup(struct uart_amba_port *uap) -{ - if (!uap->dmatx.chan) - return; - - uap->dmatx.buf = kmalloc(PL011_DMA_BUFFER_SIZE, GFP_KERNEL); - if (!uap->dmatx.buf) { - dev_err(uap->port.dev, "no memory for DMA TX buffer\n"); - uap->port.fifosize = uap->fifosize; - return; - } - - sg_init_one(&uap->dmatx.sg, uap->dmatx.buf, PL011_DMA_BUFFER_SIZE); - - /* The DMA buffer is now the FIFO the TTY subsystem can use */ - uap->port.fifosize = PL011_DMA_BUFFER_SIZE; - uap->using_dma = true; - - /* Turn on DMA error (RX/TX will be enabled on demand) */ - uap->dmacr |= UART011_DMAONERR; - writew(uap->dmacr, uap->port.membase + UART011_DMACR); - - /* - * ST Micro variants has some specific dma burst threshold - * compensation. Set this to 16 bytes, so burst will only - * be issued above/below 16 bytes. - */ - if (uap->vendor->dma_threshold) - writew(ST_UART011_DMAWM_RX_16 | ST_UART011_DMAWM_TX_16, - uap->port.membase + ST_UART011_DMAWM); -} - -static void pl011_dma_shutdown(struct uart_amba_port *uap) -{ - if (!uap->using_dma) - return; - - /* Disable RX and TX DMA */ - while (readw(uap->port.membase + UART01x_FR) & UART01x_FR_BUSY) - barrier(); - - spin_lock_irq(&uap->port.lock); - uap->dmacr &= ~(UART011_DMAONERR | UART011_RXDMAE | UART011_TXDMAE); - writew(uap->dmacr, uap->port.membase + UART011_DMACR); - spin_unlock_irq(&uap->port.lock); - - /* In theory, this should already be done by pl011_dma_flush_buffer */ - dmaengine_terminate_all(uap->dmatx.chan); - if (uap->dmatx.queued) { - dma_unmap_sg(uap->dmatx.chan->device->dev, &uap->dmatx.sg, 1, - DMA_TO_DEVICE); - uap->dmatx.queued = false; - } - - kfree(uap->dmatx.buf); - - uap->using_dma = false; -} - -#else -/* Blank functions if the DMA engine is not available */ -static inline void pl011_dma_probe(struct uart_amba_port *uap) -{ -} - -static inline void pl011_dma_remove(struct uart_amba_port *uap) -{ -} - -static inline void pl011_dma_startup(struct uart_amba_port *uap) -{ -} - -static inline void pl011_dma_shutdown(struct uart_amba_port *uap) -{ -} - -static inline bool pl011_dma_tx_irq(struct uart_amba_port *uap) -{ - return false; -} - -static inline void pl011_dma_tx_stop(struct uart_amba_port *uap) -{ -} - -static inline bool pl011_dma_tx_start(struct uart_amba_port *uap) -{ - return false; -} - -#define pl011_dma_flush_buffer NULL -#endif - - -static void pl011_stop_tx(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - - uap->im &= ~UART011_TXIM; - writew(uap->im, uap->port.membase + UART011_IMSC); - pl011_dma_tx_stop(uap); -} - -static void pl011_start_tx(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - - if (!pl011_dma_tx_start(uap)) { - uap->im |= UART011_TXIM; - writew(uap->im, uap->port.membase + UART011_IMSC); - } -} - -static void pl011_stop_rx(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - - uap->im &= ~(UART011_RXIM|UART011_RTIM|UART011_FEIM| - UART011_PEIM|UART011_BEIM|UART011_OEIM); - writew(uap->im, uap->port.membase + UART011_IMSC); -} - -static void pl011_enable_ms(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - - uap->im |= UART011_RIMIM|UART011_CTSMIM|UART011_DCDMIM|UART011_DSRMIM; - writew(uap->im, uap->port.membase + UART011_IMSC); -} - -static void pl011_rx_chars(struct uart_amba_port *uap) -{ - struct tty_struct *tty = uap->port.state->port.tty; - unsigned int status, ch, flag, max_count = 256; - - status = readw(uap->port.membase + UART01x_FR); - while ((status & UART01x_FR_RXFE) == 0 && max_count--) { - ch = readw(uap->port.membase + UART01x_DR) | UART_DUMMY_DR_RX; - flag = TTY_NORMAL; - uap->port.icount.rx++; - - /* - * Note that the error handling code is - * out of the main execution path - */ - if (unlikely(ch & UART_DR_ERROR)) { - if (ch & UART011_DR_BE) { - ch &= ~(UART011_DR_FE | UART011_DR_PE); - uap->port.icount.brk++; - if (uart_handle_break(&uap->port)) - goto ignore_char; - } else if (ch & UART011_DR_PE) - uap->port.icount.parity++; - else if (ch & UART011_DR_FE) - uap->port.icount.frame++; - if (ch & UART011_DR_OE) - uap->port.icount.overrun++; - - ch &= uap->port.read_status_mask; - - if (ch & UART011_DR_BE) - flag = TTY_BREAK; - else if (ch & UART011_DR_PE) - flag = TTY_PARITY; - else if (ch & UART011_DR_FE) - flag = TTY_FRAME; - } - - if (uart_handle_sysrq_char(&uap->port, ch & 255)) - goto ignore_char; - - uart_insert_char(&uap->port, ch, UART011_DR_OE, ch, flag); - - ignore_char: - status = readw(uap->port.membase + UART01x_FR); - } - spin_unlock(&uap->port.lock); - tty_flip_buffer_push(tty); - spin_lock(&uap->port.lock); -} - -static void pl011_tx_chars(struct uart_amba_port *uap) -{ - struct circ_buf *xmit = &uap->port.state->xmit; - int count; - - if (uap->port.x_char) { - writew(uap->port.x_char, uap->port.membase + UART01x_DR); - uap->port.icount.tx++; - uap->port.x_char = 0; - return; - } - if (uart_circ_empty(xmit) || uart_tx_stopped(&uap->port)) { - pl011_stop_tx(&uap->port); - return; - } - - /* If we are using DMA mode, try to send some characters. */ - if (pl011_dma_tx_irq(uap)) - return; - - count = uap->fifosize >> 1; - do { - writew(xmit->buf[xmit->tail], uap->port.membase + UART01x_DR); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - uap->port.icount.tx++; - if (uart_circ_empty(xmit)) - break; - } while (--count > 0); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&uap->port); - - if (uart_circ_empty(xmit)) - pl011_stop_tx(&uap->port); -} - -static void pl011_modem_status(struct uart_amba_port *uap) -{ - unsigned int status, delta; - - status = readw(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY; - - delta = status ^ uap->old_status; - uap->old_status = status; - - if (!delta) - return; - - if (delta & UART01x_FR_DCD) - uart_handle_dcd_change(&uap->port, status & UART01x_FR_DCD); - - if (delta & UART01x_FR_DSR) - uap->port.icount.dsr++; - - if (delta & UART01x_FR_CTS) - uart_handle_cts_change(&uap->port, status & UART01x_FR_CTS); - - wake_up_interruptible(&uap->port.state->port.delta_msr_wait); -} - -static irqreturn_t pl011_int(int irq, void *dev_id) -{ - struct uart_amba_port *uap = dev_id; - unsigned long flags; - unsigned int status, pass_counter = AMBA_ISR_PASS_LIMIT; - int handled = 0; - - spin_lock_irqsave(&uap->port.lock, flags); - - status = readw(uap->port.membase + UART011_MIS); - if (status) { - do { - writew(status & ~(UART011_TXIS|UART011_RTIS| - UART011_RXIS), - uap->port.membase + UART011_ICR); - - if (status & (UART011_RTIS|UART011_RXIS)) - pl011_rx_chars(uap); - if (status & (UART011_DSRMIS|UART011_DCDMIS| - UART011_CTSMIS|UART011_RIMIS)) - pl011_modem_status(uap); - if (status & UART011_TXIS) - pl011_tx_chars(uap); - - if (pass_counter-- == 0) - break; - - status = readw(uap->port.membase + UART011_MIS); - } while (status != 0); - handled = 1; - } - - spin_unlock_irqrestore(&uap->port.lock, flags); - - return IRQ_RETVAL(handled); -} - -static unsigned int pl01x_tx_empty(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned int status = readw(uap->port.membase + UART01x_FR); - return status & (UART01x_FR_BUSY|UART01x_FR_TXFF) ? 0 : TIOCSER_TEMT; -} - -static unsigned int pl01x_get_mctrl(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned int result = 0; - unsigned int status = readw(uap->port.membase + UART01x_FR); - -#define TIOCMBIT(uartbit, tiocmbit) \ - if (status & uartbit) \ - result |= tiocmbit - - TIOCMBIT(UART01x_FR_DCD, TIOCM_CAR); - TIOCMBIT(UART01x_FR_DSR, TIOCM_DSR); - TIOCMBIT(UART01x_FR_CTS, TIOCM_CTS); - TIOCMBIT(UART011_FR_RI, TIOCM_RNG); -#undef TIOCMBIT - return result; -} - -static void pl011_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned int cr; - - cr = readw(uap->port.membase + UART011_CR); - -#define TIOCMBIT(tiocmbit, uartbit) \ - if (mctrl & tiocmbit) \ - cr |= uartbit; \ - else \ - cr &= ~uartbit - - TIOCMBIT(TIOCM_RTS, UART011_CR_RTS); - TIOCMBIT(TIOCM_DTR, UART011_CR_DTR); - TIOCMBIT(TIOCM_OUT1, UART011_CR_OUT1); - TIOCMBIT(TIOCM_OUT2, UART011_CR_OUT2); - TIOCMBIT(TIOCM_LOOP, UART011_CR_LBE); - - if (uap->autorts) { - /* We need to disable auto-RTS if we want to turn RTS off */ - TIOCMBIT(TIOCM_RTS, UART011_CR_RTSEN); - } -#undef TIOCMBIT - - writew(cr, uap->port.membase + UART011_CR); -} - -static void pl011_break_ctl(struct uart_port *port, int break_state) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned long flags; - unsigned int lcr_h; - - spin_lock_irqsave(&uap->port.lock, flags); - lcr_h = readw(uap->port.membase + uap->lcrh_tx); - if (break_state == -1) - lcr_h |= UART01x_LCRH_BRK; - else - lcr_h &= ~UART01x_LCRH_BRK; - writew(lcr_h, uap->port.membase + uap->lcrh_tx); - spin_unlock_irqrestore(&uap->port.lock, flags); -} - -#ifdef CONFIG_CONSOLE_POLL -static int pl010_get_poll_char(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned int status; - - status = readw(uap->port.membase + UART01x_FR); - if (status & UART01x_FR_RXFE) - return NO_POLL_CHAR; - - return readw(uap->port.membase + UART01x_DR); -} - -static void pl010_put_poll_char(struct uart_port *port, - unsigned char ch) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - - while (readw(uap->port.membase + UART01x_FR) & UART01x_FR_TXFF) - barrier(); - - writew(ch, uap->port.membase + UART01x_DR); -} - -#endif /* CONFIG_CONSOLE_POLL */ - -static int pl011_startup(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned int cr; - int retval; - - /* - * Try to enable the clock producer. - */ - retval = clk_enable(uap->clk); - if (retval) - goto out; - - uap->port.uartclk = clk_get_rate(uap->clk); - - /* - * Allocate the IRQ - */ - retval = request_irq(uap->port.irq, pl011_int, 0, "uart-pl011", uap); - if (retval) - goto clk_dis; - - writew(uap->vendor->ifls, uap->port.membase + UART011_IFLS); - - /* - * Provoke TX FIFO interrupt into asserting. - */ - cr = UART01x_CR_UARTEN | UART011_CR_TXE | UART011_CR_LBE; - writew(cr, uap->port.membase + UART011_CR); - writew(0, uap->port.membase + UART011_FBRD); - writew(1, uap->port.membase + UART011_IBRD); - writew(0, uap->port.membase + uap->lcrh_rx); - if (uap->lcrh_tx != uap->lcrh_rx) { - int i; - /* - * Wait 10 PCLKs before writing LCRH_TX register, - * to get this delay write read only register 10 times - */ - for (i = 0; i < 10; ++i) - writew(0xff, uap->port.membase + UART011_MIS); - writew(0, uap->port.membase + uap->lcrh_tx); - } - writew(0, uap->port.membase + UART01x_DR); - while (readw(uap->port.membase + UART01x_FR) & UART01x_FR_BUSY) - barrier(); - - cr = UART01x_CR_UARTEN | UART011_CR_RXE | UART011_CR_TXE; - writew(cr, uap->port.membase + UART011_CR); - - /* Clear pending error interrupts */ - writew(UART011_OEIS | UART011_BEIS | UART011_PEIS | UART011_FEIS, - uap->port.membase + UART011_ICR); - - /* - * initialise the old status of the modem signals - */ - uap->old_status = readw(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY; - - /* Startup DMA */ - pl011_dma_startup(uap); - - /* - * Finally, enable interrupts - */ - spin_lock_irq(&uap->port.lock); - uap->im = UART011_RXIM | UART011_RTIM; - writew(uap->im, uap->port.membase + UART011_IMSC); - spin_unlock_irq(&uap->port.lock); - - return 0; - - clk_dis: - clk_disable(uap->clk); - out: - return retval; -} - -static void pl011_shutdown_channel(struct uart_amba_port *uap, - unsigned int lcrh) -{ - unsigned long val; - - val = readw(uap->port.membase + lcrh); - val &= ~(UART01x_LCRH_BRK | UART01x_LCRH_FEN); - writew(val, uap->port.membase + lcrh); -} - -static void pl011_shutdown(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - - /* - * disable all interrupts - */ - spin_lock_irq(&uap->port.lock); - uap->im = 0; - writew(uap->im, uap->port.membase + UART011_IMSC); - writew(0xffff, uap->port.membase + UART011_ICR); - spin_unlock_irq(&uap->port.lock); - - pl011_dma_shutdown(uap); - - /* - * Free the interrupt - */ - free_irq(uap->port.irq, uap); - - /* - * disable the port - */ - uap->autorts = false; - writew(UART01x_CR_UARTEN | UART011_CR_TXE, uap->port.membase + UART011_CR); - - /* - * disable break condition and fifos - */ - pl011_shutdown_channel(uap, uap->lcrh_rx); - if (uap->lcrh_rx != uap->lcrh_tx) - pl011_shutdown_channel(uap, uap->lcrh_tx); - - /* - * Shut down the clock producer - */ - clk_disable(uap->clk); -} - -static void -pl011_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned int lcr_h, old_cr; - unsigned long flags; - unsigned int baud, quot, clkdiv; - - if (uap->vendor->oversampling) - clkdiv = 8; - else - clkdiv = 16; - - /* - * Ask the core to calculate the divisor for us. - */ - baud = uart_get_baud_rate(port, termios, old, 0, - port->uartclk / clkdiv); - - if (baud > port->uartclk/16) - quot = DIV_ROUND_CLOSEST(port->uartclk * 8, baud); - else - quot = DIV_ROUND_CLOSEST(port->uartclk * 4, baud); - - switch (termios->c_cflag & CSIZE) { - case CS5: - lcr_h = UART01x_LCRH_WLEN_5; - break; - case CS6: - lcr_h = UART01x_LCRH_WLEN_6; - break; - case CS7: - lcr_h = UART01x_LCRH_WLEN_7; - break; - default: // CS8 - lcr_h = UART01x_LCRH_WLEN_8; - break; - } - if (termios->c_cflag & CSTOPB) - lcr_h |= UART01x_LCRH_STP2; - if (termios->c_cflag & PARENB) { - lcr_h |= UART01x_LCRH_PEN; - if (!(termios->c_cflag & PARODD)) - lcr_h |= UART01x_LCRH_EPS; - } - if (uap->fifosize > 1) - lcr_h |= UART01x_LCRH_FEN; - - spin_lock_irqsave(&port->lock, flags); - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - port->read_status_mask = UART011_DR_OE | 255; - if (termios->c_iflag & INPCK) - port->read_status_mask |= UART011_DR_FE | UART011_DR_PE; - if (termios->c_iflag & (BRKINT | PARMRK)) - port->read_status_mask |= UART011_DR_BE; - - /* - * Characters to ignore - */ - port->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= UART011_DR_FE | UART011_DR_PE; - if (termios->c_iflag & IGNBRK) { - port->ignore_status_mask |= UART011_DR_BE; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= UART011_DR_OE; - } - - /* - * Ignore all characters if CREAD is not set. - */ - if ((termios->c_cflag & CREAD) == 0) - port->ignore_status_mask |= UART_DUMMY_DR_RX; - - if (UART_ENABLE_MS(port, termios->c_cflag)) - pl011_enable_ms(port); - - /* first, disable everything */ - old_cr = readw(port->membase + UART011_CR); - writew(0, port->membase + UART011_CR); - - if (termios->c_cflag & CRTSCTS) { - if (old_cr & UART011_CR_RTS) - old_cr |= UART011_CR_RTSEN; - - old_cr |= UART011_CR_CTSEN; - uap->autorts = true; - } else { - old_cr &= ~(UART011_CR_CTSEN | UART011_CR_RTSEN); - uap->autorts = false; - } - - if (uap->vendor->oversampling) { - if (baud > port->uartclk / 16) - old_cr |= ST_UART011_CR_OVSFACT; - else - old_cr &= ~ST_UART011_CR_OVSFACT; - } - - /* Set baud rate */ - writew(quot & 0x3f, port->membase + UART011_FBRD); - writew(quot >> 6, port->membase + UART011_IBRD); - - /* - * ----------v----------v----------v----------v----- - * NOTE: MUST BE WRITTEN AFTER UARTLCR_M & UARTLCR_L - * ----------^----------^----------^----------^----- - */ - writew(lcr_h, port->membase + uap->lcrh_rx); - if (uap->lcrh_rx != uap->lcrh_tx) { - int i; - /* - * Wait 10 PCLKs before writing LCRH_TX register, - * to get this delay write read only register 10 times - */ - for (i = 0; i < 10; ++i) - writew(0xff, uap->port.membase + UART011_MIS); - writew(lcr_h, port->membase + uap->lcrh_tx); - } - writew(old_cr, port->membase + UART011_CR); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *pl011_type(struct uart_port *port) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - return uap->port.type == PORT_AMBA ? uap->type : NULL; -} - -/* - * Release the memory region(s) being used by 'port' - */ -static void pl010_release_port(struct uart_port *port) -{ - release_mem_region(port->mapbase, SZ_4K); -} - -/* - * Request the memory region(s) being used by 'port' - */ -static int pl010_request_port(struct uart_port *port) -{ - return request_mem_region(port->mapbase, SZ_4K, "uart-pl011") - != NULL ? 0 : -EBUSY; -} - -/* - * Configure/autoconfigure the port. - */ -static void pl010_config_port(struct uart_port *port, int flags) -{ - if (flags & UART_CONFIG_TYPE) { - port->type = PORT_AMBA; - pl010_request_port(port); - } -} - -/* - * verify the new serial_struct (for TIOCSSERIAL). - */ -static int pl010_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - int ret = 0; - if (ser->type != PORT_UNKNOWN && ser->type != PORT_AMBA) - ret = -EINVAL; - if (ser->irq < 0 || ser->irq >= nr_irqs) - ret = -EINVAL; - if (ser->baud_base < 9600) - ret = -EINVAL; - return ret; -} - -static struct uart_ops amba_pl011_pops = { - .tx_empty = pl01x_tx_empty, - .set_mctrl = pl011_set_mctrl, - .get_mctrl = pl01x_get_mctrl, - .stop_tx = pl011_stop_tx, - .start_tx = pl011_start_tx, - .stop_rx = pl011_stop_rx, - .enable_ms = pl011_enable_ms, - .break_ctl = pl011_break_ctl, - .startup = pl011_startup, - .shutdown = pl011_shutdown, - .flush_buffer = pl011_dma_flush_buffer, - .set_termios = pl011_set_termios, - .type = pl011_type, - .release_port = pl010_release_port, - .request_port = pl010_request_port, - .config_port = pl010_config_port, - .verify_port = pl010_verify_port, -#ifdef CONFIG_CONSOLE_POLL - .poll_get_char = pl010_get_poll_char, - .poll_put_char = pl010_put_poll_char, -#endif -}; - -static struct uart_amba_port *amba_ports[UART_NR]; - -#ifdef CONFIG_SERIAL_AMBA_PL011_CONSOLE - -static void pl011_console_putchar(struct uart_port *port, int ch) -{ - struct uart_amba_port *uap = (struct uart_amba_port *)port; - - while (readw(uap->port.membase + UART01x_FR) & UART01x_FR_TXFF) - barrier(); - writew(ch, uap->port.membase + UART01x_DR); -} - -static void -pl011_console_write(struct console *co, const char *s, unsigned int count) -{ - struct uart_amba_port *uap = amba_ports[co->index]; - unsigned int status, old_cr, new_cr; - - clk_enable(uap->clk); - - /* - * First save the CR then disable the interrupts - */ - old_cr = readw(uap->port.membase + UART011_CR); - new_cr = old_cr & ~UART011_CR_CTSEN; - new_cr |= UART01x_CR_UARTEN | UART011_CR_TXE; - writew(new_cr, uap->port.membase + UART011_CR); - - uart_console_write(&uap->port, s, count, pl011_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore the TCR - */ - do { - status = readw(uap->port.membase + UART01x_FR); - } while (status & UART01x_FR_BUSY); - writew(old_cr, uap->port.membase + UART011_CR); - - clk_disable(uap->clk); -} - -static void __init -pl011_console_get_options(struct uart_amba_port *uap, int *baud, - int *parity, int *bits) -{ - if (readw(uap->port.membase + UART011_CR) & UART01x_CR_UARTEN) { - unsigned int lcr_h, ibrd, fbrd; - - lcr_h = readw(uap->port.membase + uap->lcrh_tx); - - *parity = 'n'; - if (lcr_h & UART01x_LCRH_PEN) { - if (lcr_h & UART01x_LCRH_EPS) - *parity = 'e'; - else - *parity = 'o'; - } - - if ((lcr_h & 0x60) == UART01x_LCRH_WLEN_7) - *bits = 7; - else - *bits = 8; - - ibrd = readw(uap->port.membase + UART011_IBRD); - fbrd = readw(uap->port.membase + UART011_FBRD); - - *baud = uap->port.uartclk * 4 / (64 * ibrd + fbrd); - - if (uap->vendor->oversampling) { - if (readw(uap->port.membase + UART011_CR) - & ST_UART011_CR_OVSFACT) - *baud *= 2; - } - } -} - -static int __init pl011_console_setup(struct console *co, char *options) -{ - struct uart_amba_port *uap; - int baud = 38400; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - if (co->index >= UART_NR) - co->index = 0; - uap = amba_ports[co->index]; - if (!uap) - return -ENODEV; - - uap->port.uartclk = clk_get_rate(uap->clk); - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - else - pl011_console_get_options(uap, &baud, &parity, &bits); - - return uart_set_options(&uap->port, co, baud, parity, bits, flow); -} - -static struct uart_driver amba_reg; -static struct console amba_console = { - .name = "ttyAMA", - .write = pl011_console_write, - .device = uart_console_device, - .setup = pl011_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &amba_reg, -}; - -#define AMBA_CONSOLE (&amba_console) -#else -#define AMBA_CONSOLE NULL -#endif - -static struct uart_driver amba_reg = { - .owner = THIS_MODULE, - .driver_name = "ttyAMA", - .dev_name = "ttyAMA", - .major = SERIAL_AMBA_MAJOR, - .minor = SERIAL_AMBA_MINOR, - .nr = UART_NR, - .cons = AMBA_CONSOLE, -}; - -static int pl011_probe(struct amba_device *dev, struct amba_id *id) -{ - struct uart_amba_port *uap; - struct vendor_data *vendor = id->data; - void __iomem *base; - int i, ret; - - for (i = 0; i < ARRAY_SIZE(amba_ports); i++) - if (amba_ports[i] == NULL) - break; - - if (i == ARRAY_SIZE(amba_ports)) { - ret = -EBUSY; - goto out; - } - - uap = kzalloc(sizeof(struct uart_amba_port), GFP_KERNEL); - if (uap == NULL) { - ret = -ENOMEM; - goto out; - } - - base = ioremap(dev->res.start, resource_size(&dev->res)); - if (!base) { - ret = -ENOMEM; - goto free; - } - - uap->clk = clk_get(&dev->dev, NULL); - if (IS_ERR(uap->clk)) { - ret = PTR_ERR(uap->clk); - goto unmap; - } - - uap->vendor = vendor; - uap->lcrh_rx = vendor->lcrh_rx; - uap->lcrh_tx = vendor->lcrh_tx; - uap->fifosize = vendor->fifosize; - uap->port.dev = &dev->dev; - uap->port.mapbase = dev->res.start; - uap->port.membase = base; - uap->port.iotype = UPIO_MEM; - uap->port.irq = dev->irq[0]; - uap->port.fifosize = uap->fifosize; - uap->port.ops = &amba_pl011_pops; - uap->port.flags = UPF_BOOT_AUTOCONF; - uap->port.line = i; - pl011_dma_probe(uap); - - snprintf(uap->type, sizeof(uap->type), "PL011 rev%u", amba_rev(dev)); - - amba_ports[i] = uap; - - amba_set_drvdata(dev, uap); - ret = uart_add_one_port(&amba_reg, &uap->port); - if (ret) { - amba_set_drvdata(dev, NULL); - amba_ports[i] = NULL; - pl011_dma_remove(uap); - clk_put(uap->clk); - unmap: - iounmap(base); - free: - kfree(uap); - } - out: - return ret; -} - -static int pl011_remove(struct amba_device *dev) -{ - struct uart_amba_port *uap = amba_get_drvdata(dev); - int i; - - amba_set_drvdata(dev, NULL); - - uart_remove_one_port(&amba_reg, &uap->port); - - for (i = 0; i < ARRAY_SIZE(amba_ports); i++) - if (amba_ports[i] == uap) - amba_ports[i] = NULL; - - pl011_dma_remove(uap); - iounmap(uap->port.membase); - clk_put(uap->clk); - kfree(uap); - return 0; -} - -#ifdef CONFIG_PM -static int pl011_suspend(struct amba_device *dev, pm_message_t state) -{ - struct uart_amba_port *uap = amba_get_drvdata(dev); - - if (!uap) - return -EINVAL; - - return uart_suspend_port(&amba_reg, &uap->port); -} - -static int pl011_resume(struct amba_device *dev) -{ - struct uart_amba_port *uap = amba_get_drvdata(dev); - - if (!uap) - return -EINVAL; - - return uart_resume_port(&amba_reg, &uap->port); -} -#endif - -static struct amba_id pl011_ids[] = { - { - .id = 0x00041011, - .mask = 0x000fffff, - .data = &vendor_arm, - }, - { - .id = 0x00380802, - .mask = 0x00ffffff, - .data = &vendor_st, - }, - { 0, 0 }, -}; - -static struct amba_driver pl011_driver = { - .drv = { - .name = "uart-pl011", - }, - .id_table = pl011_ids, - .probe = pl011_probe, - .remove = pl011_remove, -#ifdef CONFIG_PM - .suspend = pl011_suspend, - .resume = pl011_resume, -#endif -}; - -static int __init pl011_init(void) -{ - int ret; - printk(KERN_INFO "Serial: AMBA PL011 UART driver\n"); - - ret = uart_register_driver(&amba_reg); - if (ret == 0) { - ret = amba_driver_register(&pl011_driver); - if (ret) - uart_unregister_driver(&amba_reg); - } - return ret; -} - -static void __exit pl011_exit(void) -{ - amba_driver_unregister(&pl011_driver); - uart_unregister_driver(&amba_reg); -} - -/* - * While this can be a module, if builtin it's most likely the console - * So let's leave module_exit but move module_init to an earlier place - */ -arch_initcall(pl011_init); -module_exit(pl011_exit); - -MODULE_AUTHOR("ARM Ltd/Deep Blue Solutions Ltd"); -MODULE_DESCRIPTION("ARM AMBA serial port driver"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/apbuart.c b/drivers/serial/apbuart.c deleted file mode 100644 index 095a5d562618..000000000000 --- a/drivers/serial/apbuart.c +++ /dev/null @@ -1,709 +0,0 @@ -/* - * Driver for GRLIB serial ports (APBUART) - * - * Based on linux/drivers/serial/amba.c - * - * Copyright (C) 2000 Deep Blue Solutions Ltd. - * Copyright (C) 2003 Konrad Eisele <eiselekd@web.de> - * Copyright (C) 2006 Daniel Hellstrom <daniel@gaisler.com>, Aeroflex Gaisler AB - * Copyright (C) 2008 Gilead Kutnick <kutnickg@zin-tech.com> - * Copyright (C) 2009 Kristoffer Glembo <kristoffer@gaisler.com>, Aeroflex Gaisler AB - */ - -#if defined(CONFIG_SERIAL_GRLIB_GAISLER_APBUART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/module.h> -#include <linux/tty.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/serial.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/kthread.h> -#include <linux/device.h> -#include <linux/of.h> -#include <linux/of_device.h> -#include <linux/of_platform.h> -#include <linux/of_irq.h> -#include <linux/platform_device.h> -#include <linux/io.h> -#include <linux/serial_core.h> -#include <asm/irq.h> - -#include "apbuart.h" - -#define SERIAL_APBUART_MAJOR TTY_MAJOR -#define SERIAL_APBUART_MINOR 64 -#define UART_DUMMY_RSR_RX 0x8000 /* for ignore all read */ - -static void apbuart_tx_chars(struct uart_port *port); - -static void apbuart_stop_tx(struct uart_port *port) -{ - unsigned int cr; - - cr = UART_GET_CTRL(port); - cr &= ~UART_CTRL_TI; - UART_PUT_CTRL(port, cr); -} - -static void apbuart_start_tx(struct uart_port *port) -{ - unsigned int cr; - - cr = UART_GET_CTRL(port); - cr |= UART_CTRL_TI; - UART_PUT_CTRL(port, cr); - - if (UART_GET_STATUS(port) & UART_STATUS_THE) - apbuart_tx_chars(port); -} - -static void apbuart_stop_rx(struct uart_port *port) -{ - unsigned int cr; - - cr = UART_GET_CTRL(port); - cr &= ~(UART_CTRL_RI); - UART_PUT_CTRL(port, cr); -} - -static void apbuart_enable_ms(struct uart_port *port) -{ - /* No modem status change interrupts for APBUART */ -} - -static void apbuart_rx_chars(struct uart_port *port) -{ - struct tty_struct *tty = port->state->port.tty; - unsigned int status, ch, rsr, flag; - unsigned int max_chars = port->fifosize; - - status = UART_GET_STATUS(port); - - while (UART_RX_DATA(status) && (max_chars--)) { - - ch = UART_GET_CHAR(port); - flag = TTY_NORMAL; - - port->icount.rx++; - - rsr = UART_GET_STATUS(port) | UART_DUMMY_RSR_RX; - UART_PUT_STATUS(port, 0); - if (rsr & UART_STATUS_ERR) { - - if (rsr & UART_STATUS_BR) { - rsr &= ~(UART_STATUS_FE | UART_STATUS_PE); - port->icount.brk++; - if (uart_handle_break(port)) - goto ignore_char; - } else if (rsr & UART_STATUS_PE) { - port->icount.parity++; - } else if (rsr & UART_STATUS_FE) { - port->icount.frame++; - } - if (rsr & UART_STATUS_OE) - port->icount.overrun++; - - rsr &= port->read_status_mask; - - if (rsr & UART_STATUS_PE) - flag = TTY_PARITY; - else if (rsr & UART_STATUS_FE) - flag = TTY_FRAME; - } - - if (uart_handle_sysrq_char(port, ch)) - goto ignore_char; - - uart_insert_char(port, rsr, UART_STATUS_OE, ch, flag); - - - ignore_char: - status = UART_GET_STATUS(port); - } - - tty_flip_buffer_push(tty); -} - -static void apbuart_tx_chars(struct uart_port *port) -{ - struct circ_buf *xmit = &port->state->xmit; - int count; - - if (port->x_char) { - UART_PUT_CHAR(port, port->x_char); - port->icount.tx++; - port->x_char = 0; - return; - } - - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - apbuart_stop_tx(port); - return; - } - - /* amba: fill FIFO */ - count = port->fifosize >> 1; - do { - UART_PUT_CHAR(port, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - if (uart_circ_empty(xmit)) - break; - } while (--count > 0); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (uart_circ_empty(xmit)) - apbuart_stop_tx(port); -} - -static irqreturn_t apbuart_int(int irq, void *dev_id) -{ - struct uart_port *port = dev_id; - unsigned int status; - - spin_lock(&port->lock); - - status = UART_GET_STATUS(port); - if (status & UART_STATUS_DR) - apbuart_rx_chars(port); - if (status & UART_STATUS_THE) - apbuart_tx_chars(port); - - spin_unlock(&port->lock); - - return IRQ_HANDLED; -} - -static unsigned int apbuart_tx_empty(struct uart_port *port) -{ - unsigned int status = UART_GET_STATUS(port); - return status & UART_STATUS_THE ? TIOCSER_TEMT : 0; -} - -static unsigned int apbuart_get_mctrl(struct uart_port *port) -{ - /* The GRLIB APBUART handles flow control in hardware */ - return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; -} - -static void apbuart_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - /* The GRLIB APBUART handles flow control in hardware */ -} - -static void apbuart_break_ctl(struct uart_port *port, int break_state) -{ - /* We don't support sending break */ -} - -static int apbuart_startup(struct uart_port *port) -{ - int retval; - unsigned int cr; - - /* Allocate the IRQ */ - retval = request_irq(port->irq, apbuart_int, 0, "apbuart", port); - if (retval) - return retval; - - /* Finally, enable interrupts */ - cr = UART_GET_CTRL(port); - UART_PUT_CTRL(port, - cr | UART_CTRL_RE | UART_CTRL_TE | - UART_CTRL_RI | UART_CTRL_TI); - - return 0; -} - -static void apbuart_shutdown(struct uart_port *port) -{ - unsigned int cr; - - /* disable all interrupts, disable the port */ - cr = UART_GET_CTRL(port); - UART_PUT_CTRL(port, - cr & ~(UART_CTRL_RE | UART_CTRL_TE | - UART_CTRL_RI | UART_CTRL_TI)); - - /* Free the interrupt */ - free_irq(port->irq, port); -} - -static void apbuart_set_termios(struct uart_port *port, - struct ktermios *termios, struct ktermios *old) -{ - unsigned int cr; - unsigned long flags; - unsigned int baud, quot; - - /* Ask the core to calculate the divisor for us. */ - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16); - if (baud == 0) - panic("invalid baudrate %i\n", port->uartclk / 16); - - /* uart_get_divisor calc a *16 uart freq, apbuart is *8 */ - quot = (uart_get_divisor(port, baud)) * 2; - cr = UART_GET_CTRL(port); - cr &= ~(UART_CTRL_PE | UART_CTRL_PS); - - if (termios->c_cflag & PARENB) { - cr |= UART_CTRL_PE; - if ((termios->c_cflag & PARODD)) - cr |= UART_CTRL_PS; - } - - /* Enable flow control. */ - if (termios->c_cflag & CRTSCTS) - cr |= UART_CTRL_FL; - - spin_lock_irqsave(&port->lock, flags); - - /* Update the per-port timeout. */ - uart_update_timeout(port, termios->c_cflag, baud); - - port->read_status_mask = UART_STATUS_OE; - if (termios->c_iflag & INPCK) - port->read_status_mask |= UART_STATUS_FE | UART_STATUS_PE; - - /* Characters to ignore */ - port->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= UART_STATUS_FE | UART_STATUS_PE; - - /* Ignore all characters if CREAD is not set. */ - if ((termios->c_cflag & CREAD) == 0) - port->ignore_status_mask |= UART_DUMMY_RSR_RX; - - /* Set baud rate */ - quot -= 1; - UART_PUT_SCAL(port, quot); - UART_PUT_CTRL(port, cr); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *apbuart_type(struct uart_port *port) -{ - return port->type == PORT_APBUART ? "GRLIB/APBUART" : NULL; -} - -static void apbuart_release_port(struct uart_port *port) -{ - release_mem_region(port->mapbase, 0x100); -} - -static int apbuart_request_port(struct uart_port *port) -{ - return request_mem_region(port->mapbase, 0x100, "grlib-apbuart") - != NULL ? 0 : -EBUSY; - return 0; -} - -/* Configure/autoconfigure the port */ -static void apbuart_config_port(struct uart_port *port, int flags) -{ - if (flags & UART_CONFIG_TYPE) { - port->type = PORT_APBUART; - apbuart_request_port(port); - } -} - -/* Verify the new serial_struct (for TIOCSSERIAL) */ -static int apbuart_verify_port(struct uart_port *port, - struct serial_struct *ser) -{ - int ret = 0; - if (ser->type != PORT_UNKNOWN && ser->type != PORT_APBUART) - ret = -EINVAL; - if (ser->irq < 0 || ser->irq >= NR_IRQS) - ret = -EINVAL; - if (ser->baud_base < 9600) - ret = -EINVAL; - return ret; -} - -static struct uart_ops grlib_apbuart_ops = { - .tx_empty = apbuart_tx_empty, - .set_mctrl = apbuart_set_mctrl, - .get_mctrl = apbuart_get_mctrl, - .stop_tx = apbuart_stop_tx, - .start_tx = apbuart_start_tx, - .stop_rx = apbuart_stop_rx, - .enable_ms = apbuart_enable_ms, - .break_ctl = apbuart_break_ctl, - .startup = apbuart_startup, - .shutdown = apbuart_shutdown, - .set_termios = apbuart_set_termios, - .type = apbuart_type, - .release_port = apbuart_release_port, - .request_port = apbuart_request_port, - .config_port = apbuart_config_port, - .verify_port = apbuart_verify_port, -}; - -static struct uart_port grlib_apbuart_ports[UART_NR]; -static struct device_node *grlib_apbuart_nodes[UART_NR]; - -static int apbuart_scan_fifo_size(struct uart_port *port, int portnumber) -{ - int ctrl, loop = 0; - int status; - int fifosize; - unsigned long flags; - - ctrl = UART_GET_CTRL(port); - - /* - * Enable the transceiver and wait for it to be ready to send data. - * Clear interrupts so that this process will not be externally - * interrupted in the middle (which can cause the transceiver to - * drain prematurely). - */ - - local_irq_save(flags); - - UART_PUT_CTRL(port, ctrl | UART_CTRL_TE); - - while (!UART_TX_READY(UART_GET_STATUS(port))) - loop++; - - /* - * Disable the transceiver so data isn't actually sent during the - * actual test. - */ - - UART_PUT_CTRL(port, ctrl & ~(UART_CTRL_TE)); - - fifosize = 1; - UART_PUT_CHAR(port, 0); - - /* - * So long as transmitting a character increments the tranceivier FIFO - * length the FIFO must be at least that big. These bytes will - * automatically drain off of the FIFO. - */ - - status = UART_GET_STATUS(port); - while (((status >> 20) & 0x3F) == fifosize) { - fifosize++; - UART_PUT_CHAR(port, 0); - status = UART_GET_STATUS(port); - } - - fifosize--; - - UART_PUT_CTRL(port, ctrl); - local_irq_restore(flags); - - if (fifosize == 0) - fifosize = 1; - - return fifosize; -} - -static void apbuart_flush_fifo(struct uart_port *port) -{ - int i; - - for (i = 0; i < port->fifosize; i++) - UART_GET_CHAR(port); -} - - -/* ======================================================================== */ -/* Console driver, if enabled */ -/* ======================================================================== */ - -#ifdef CONFIG_SERIAL_GRLIB_GAISLER_APBUART_CONSOLE - -static void apbuart_console_putchar(struct uart_port *port, int ch) -{ - unsigned int status; - do { - status = UART_GET_STATUS(port); - } while (!UART_TX_READY(status)); - UART_PUT_CHAR(port, ch); -} - -static void -apbuart_console_write(struct console *co, const char *s, unsigned int count) -{ - struct uart_port *port = &grlib_apbuart_ports[co->index]; - unsigned int status, old_cr, new_cr; - - /* First save the CR then disable the interrupts */ - old_cr = UART_GET_CTRL(port); - new_cr = old_cr & ~(UART_CTRL_RI | UART_CTRL_TI); - UART_PUT_CTRL(port, new_cr); - - uart_console_write(port, s, count, apbuart_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore the TCR - */ - do { - status = UART_GET_STATUS(port); - } while (!UART_TX_READY(status)); - UART_PUT_CTRL(port, old_cr); -} - -static void __init -apbuart_console_get_options(struct uart_port *port, int *baud, - int *parity, int *bits) -{ - if (UART_GET_CTRL(port) & (UART_CTRL_RE | UART_CTRL_TE)) { - - unsigned int quot, status; - status = UART_GET_STATUS(port); - - *parity = 'n'; - if (status & UART_CTRL_PE) { - if ((status & UART_CTRL_PS) == 0) - *parity = 'e'; - else - *parity = 'o'; - } - - *bits = 8; - quot = UART_GET_SCAL(port) / 8; - *baud = port->uartclk / (16 * (quot + 1)); - } -} - -static int __init apbuart_console_setup(struct console *co, char *options) -{ - struct uart_port *port; - int baud = 38400; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - pr_debug("apbuart_console_setup co=%p, co->index=%i, options=%s\n", - co, co->index, options); - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - if (co->index >= grlib_apbuart_port_nr) - co->index = 0; - - port = &grlib_apbuart_ports[co->index]; - - spin_lock_init(&port->lock); - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - else - apbuart_console_get_options(port, &baud, &parity, &bits); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - -static struct uart_driver grlib_apbuart_driver; - -static struct console grlib_apbuart_console = { - .name = "ttyS", - .write = apbuart_console_write, - .device = uart_console_device, - .setup = apbuart_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &grlib_apbuart_driver, -}; - - -static int grlib_apbuart_configure(void); - -static int __init apbuart_console_init(void) -{ - if (grlib_apbuart_configure()) - return -ENODEV; - register_console(&grlib_apbuart_console); - return 0; -} - -console_initcall(apbuart_console_init); - -#define APBUART_CONSOLE (&grlib_apbuart_console) -#else -#define APBUART_CONSOLE NULL -#endif - -static struct uart_driver grlib_apbuart_driver = { - .owner = THIS_MODULE, - .driver_name = "serial", - .dev_name = "ttyS", - .major = SERIAL_APBUART_MAJOR, - .minor = SERIAL_APBUART_MINOR, - .nr = UART_NR, - .cons = APBUART_CONSOLE, -}; - - -/* ======================================================================== */ -/* OF Platform Driver */ -/* ======================================================================== */ - -static int __devinit apbuart_probe(struct platform_device *op, - const struct of_device_id *match) -{ - int i = -1; - struct uart_port *port = NULL; - - i = 0; - for (i = 0; i < grlib_apbuart_port_nr; i++) { - if (op->dev.of_node == grlib_apbuart_nodes[i]) - break; - } - - port = &grlib_apbuart_ports[i]; - port->dev = &op->dev; - - uart_add_one_port(&grlib_apbuart_driver, (struct uart_port *) port); - - apbuart_flush_fifo((struct uart_port *) port); - - printk(KERN_INFO "grlib-apbuart at 0x%llx, irq %d\n", - (unsigned long long) port->mapbase, port->irq); - return 0; -} - -static struct of_device_id __initdata apbuart_match[] = { - { - .name = "GAISLER_APBUART", - }, - { - .name = "01_00c", - }, - {}, -}; - -static struct of_platform_driver grlib_apbuart_of_driver = { - .probe = apbuart_probe, - .driver = { - .owner = THIS_MODULE, - .name = "grlib-apbuart", - .of_match_table = apbuart_match, - }, -}; - - -static int grlib_apbuart_configure(void) -{ - struct device_node *np, *rp; - const u32 *prop; - int freq_khz, line = 0; - - /* Get bus frequency */ - rp = of_find_node_by_path("/"); - if (!rp) - return -ENODEV; - rp = of_get_next_child(rp, NULL); - if (!rp) - return -ENODEV; - prop = of_get_property(rp, "clock-frequency", NULL); - if (!prop) - return -ENODEV; - freq_khz = *prop; - - for_each_matching_node(np, apbuart_match) { - const int *irqs, *ampopts; - const struct amba_prom_registers *regs; - struct uart_port *port; - unsigned long addr; - - ampopts = of_get_property(np, "ampopts", NULL); - if (ampopts && (*ampopts == 0)) - continue; /* Ignore if used by another OS instance */ - - irqs = of_get_property(np, "interrupts", NULL); - regs = of_get_property(np, "reg", NULL); - - if (!irqs || !regs) - continue; - - grlib_apbuart_nodes[line] = np; - - addr = regs->phys_addr; - - port = &grlib_apbuart_ports[line]; - - port->mapbase = addr; - port->membase = ioremap(addr, sizeof(struct grlib_apbuart_regs_map)); - port->irq = *irqs; - port->iotype = UPIO_MEM; - port->ops = &grlib_apbuart_ops; - port->flags = UPF_BOOT_AUTOCONF; - port->line = line; - port->uartclk = freq_khz * 1000; - port->fifosize = apbuart_scan_fifo_size((struct uart_port *) port, line); - line++; - - /* We support maximum UART_NR uarts ... */ - if (line == UART_NR) - break; - } - - grlib_apbuart_driver.nr = grlib_apbuart_port_nr = line; - return line ? 0 : -ENODEV; -} - -static int __init grlib_apbuart_init(void) -{ - int ret; - - /* Find all APBUARTS in device the tree and initialize their ports */ - ret = grlib_apbuart_configure(); - if (ret) - return ret; - - printk(KERN_INFO "Serial: GRLIB APBUART driver\n"); - - ret = uart_register_driver(&grlib_apbuart_driver); - - if (ret) { - printk(KERN_ERR "%s: uart_register_driver failed (%i)\n", - __FILE__, ret); - return ret; - } - - ret = of_register_platform_driver(&grlib_apbuart_of_driver); - if (ret) { - printk(KERN_ERR - "%s: of_register_platform_driver failed (%i)\n", - __FILE__, ret); - uart_unregister_driver(&grlib_apbuart_driver); - return ret; - } - - return ret; -} - -static void __exit grlib_apbuart_exit(void) -{ - int i; - - for (i = 0; i < grlib_apbuart_port_nr; i++) - uart_remove_one_port(&grlib_apbuart_driver, - &grlib_apbuart_ports[i]); - - uart_unregister_driver(&grlib_apbuart_driver); - of_unregister_platform_driver(&grlib_apbuart_of_driver); -} - -module_init(grlib_apbuart_init); -module_exit(grlib_apbuart_exit); - -MODULE_AUTHOR("Aeroflex Gaisler AB"); -MODULE_DESCRIPTION("GRLIB APBUART serial driver"); -MODULE_VERSION("2.1"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/apbuart.h b/drivers/serial/apbuart.h deleted file mode 100644 index 5faf87c8d2bc..000000000000 --- a/drivers/serial/apbuart.h +++ /dev/null @@ -1,64 +0,0 @@ -#ifndef __GRLIB_APBUART_H__ -#define __GRLIB_APBUART_H__ - -#include <asm/io.h> - -#define UART_NR 8 -static int grlib_apbuart_port_nr; - -struct grlib_apbuart_regs_map { - u32 data; - u32 status; - u32 ctrl; - u32 scaler; -}; - -struct amba_prom_registers { - unsigned int phys_addr; - unsigned int reg_size; -}; - -/* - * The following defines the bits in the APBUART Status Registers. - */ -#define UART_STATUS_DR 0x00000001 /* Data Ready */ -#define UART_STATUS_TSE 0x00000002 /* TX Send Register Empty */ -#define UART_STATUS_THE 0x00000004 /* TX Hold Register Empty */ -#define UART_STATUS_BR 0x00000008 /* Break Error */ -#define UART_STATUS_OE 0x00000010 /* RX Overrun Error */ -#define UART_STATUS_PE 0x00000020 /* RX Parity Error */ -#define UART_STATUS_FE 0x00000040 /* RX Framing Error */ -#define UART_STATUS_ERR 0x00000078 /* Error Mask */ - -/* - * The following defines the bits in the APBUART Ctrl Registers. - */ -#define UART_CTRL_RE 0x00000001 /* Receiver enable */ -#define UART_CTRL_TE 0x00000002 /* Transmitter enable */ -#define UART_CTRL_RI 0x00000004 /* Receiver interrupt enable */ -#define UART_CTRL_TI 0x00000008 /* Transmitter irq */ -#define UART_CTRL_PS 0x00000010 /* Parity select */ -#define UART_CTRL_PE 0x00000020 /* Parity enable */ -#define UART_CTRL_FL 0x00000040 /* Flow control enable */ -#define UART_CTRL_LB 0x00000080 /* Loopback enable */ - -#define APBBASE(port) ((struct grlib_apbuart_regs_map *)((port)->membase)) - -#define APBBASE_DATA_P(port) (&(APBBASE(port)->data)) -#define APBBASE_STATUS_P(port) (&(APBBASE(port)->status)) -#define APBBASE_CTRL_P(port) (&(APBBASE(port)->ctrl)) -#define APBBASE_SCALAR_P(port) (&(APBBASE(port)->scaler)) - -#define UART_GET_CHAR(port) (__raw_readl(APBBASE_DATA_P(port))) -#define UART_PUT_CHAR(port, v) (__raw_writel(v, APBBASE_DATA_P(port))) -#define UART_GET_STATUS(port) (__raw_readl(APBBASE_STATUS_P(port))) -#define UART_PUT_STATUS(port, v)(__raw_writel(v, APBBASE_STATUS_P(port))) -#define UART_GET_CTRL(port) (__raw_readl(APBBASE_CTRL_P(port))) -#define UART_PUT_CTRL(port, v) (__raw_writel(v, APBBASE_CTRL_P(port))) -#define UART_GET_SCAL(port) (__raw_readl(APBBASE_SCALAR_P(port))) -#define UART_PUT_SCAL(port, v) (__raw_writel(v, APBBASE_SCALAR_P(port))) - -#define UART_RX_DATA(s) (((s) & UART_STATUS_DR) != 0) -#define UART_TX_READY(s) (((s) & UART_STATUS_THE) != 0) - -#endif /* __GRLIB_APBUART_H__ */ diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c deleted file mode 100644 index 3892666b5fbd..000000000000 --- a/drivers/serial/atmel_serial.c +++ /dev/null @@ -1,1808 +0,0 @@ -/* - * linux/drivers/char/atmel_serial.c - * - * Driver for Atmel AT91 / AT32 Serial ports - * Copyright (C) 2003 Rick Bronson - * - * Based on drivers/char/serial_sa1100.c, by Deep Blue Solutions Ltd. - * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. - * - * DMA support added by Chip Coldwell. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ -#include <linux/module.h> -#include <linux/tty.h> -#include <linux/ioport.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/serial.h> -#include <linux/clk.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/tty_flip.h> -#include <linux/platform_device.h> -#include <linux/dma-mapping.h> -#include <linux/atmel_pdc.h> -#include <linux/atmel_serial.h> -#include <linux/uaccess.h> - -#include <asm/io.h> -#include <asm/ioctls.h> - -#include <asm/mach/serial_at91.h> -#include <mach/board.h> - -#ifdef CONFIG_ARM -#include <mach/cpu.h> -#include <mach/gpio.h> -#endif - -#define PDC_BUFFER_SIZE 512 -/* Revisit: We should calculate this based on the actual port settings */ -#define PDC_RX_TIMEOUT (3 * 10) /* 3 bytes */ - -#if defined(CONFIG_SERIAL_ATMEL_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/serial_core.h> - -static void atmel_start_rx(struct uart_port *port); -static void atmel_stop_rx(struct uart_port *port); - -#ifdef CONFIG_SERIAL_ATMEL_TTYAT - -/* Use device name ttyAT, major 204 and minor 154-169. This is necessary if we - * should coexist with the 8250 driver, such as if we have an external 16C550 - * UART. */ -#define SERIAL_ATMEL_MAJOR 204 -#define MINOR_START 154 -#define ATMEL_DEVICENAME "ttyAT" - -#else - -/* Use device name ttyS, major 4, minor 64-68. This is the usual serial port - * name, but it is legally reserved for the 8250 driver. */ -#define SERIAL_ATMEL_MAJOR TTY_MAJOR -#define MINOR_START 64 -#define ATMEL_DEVICENAME "ttyS" - -#endif - -#define ATMEL_ISR_PASS_LIMIT 256 - -/* UART registers. CR is write-only, hence no GET macro */ -#define UART_PUT_CR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_CR) -#define UART_GET_MR(port) __raw_readl((port)->membase + ATMEL_US_MR) -#define UART_PUT_MR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_MR) -#define UART_PUT_IER(port,v) __raw_writel(v, (port)->membase + ATMEL_US_IER) -#define UART_PUT_IDR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_IDR) -#define UART_GET_IMR(port) __raw_readl((port)->membase + ATMEL_US_IMR) -#define UART_GET_CSR(port) __raw_readl((port)->membase + ATMEL_US_CSR) -#define UART_GET_CHAR(port) __raw_readl((port)->membase + ATMEL_US_RHR) -#define UART_PUT_CHAR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_THR) -#define UART_GET_BRGR(port) __raw_readl((port)->membase + ATMEL_US_BRGR) -#define UART_PUT_BRGR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_BRGR) -#define UART_PUT_RTOR(port,v) __raw_writel(v, (port)->membase + ATMEL_US_RTOR) -#define UART_PUT_TTGR(port, v) __raw_writel(v, (port)->membase + ATMEL_US_TTGR) - - /* PDC registers */ -#define UART_PUT_PTCR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_PTCR) -#define UART_GET_PTSR(port) __raw_readl((port)->membase + ATMEL_PDC_PTSR) - -#define UART_PUT_RPR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_RPR) -#define UART_GET_RPR(port) __raw_readl((port)->membase + ATMEL_PDC_RPR) -#define UART_PUT_RCR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_RCR) -#define UART_PUT_RNPR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_RNPR) -#define UART_PUT_RNCR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_RNCR) - -#define UART_PUT_TPR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_TPR) -#define UART_PUT_TCR(port,v) __raw_writel(v, (port)->membase + ATMEL_PDC_TCR) -#define UART_GET_TCR(port) __raw_readl((port)->membase + ATMEL_PDC_TCR) - -static int (*atmel_open_hook)(struct uart_port *); -static void (*atmel_close_hook)(struct uart_port *); - -struct atmel_dma_buffer { - unsigned char *buf; - dma_addr_t dma_addr; - unsigned int dma_size; - unsigned int ofs; -}; - -struct atmel_uart_char { - u16 status; - u16 ch; -}; - -#define ATMEL_SERIAL_RINGSIZE 1024 - -/* - * We wrap our port structure around the generic uart_port. - */ -struct atmel_uart_port { - struct uart_port uart; /* uart */ - struct clk *clk; /* uart clock */ - int may_wakeup; /* cached value of device_may_wakeup for times we need to disable it */ - u32 backup_imr; /* IMR saved during suspend */ - int break_active; /* break being received */ - - short use_dma_rx; /* enable PDC receiver */ - short pdc_rx_idx; /* current PDC RX buffer */ - struct atmel_dma_buffer pdc_rx[2]; /* PDC receier */ - - short use_dma_tx; /* enable PDC transmitter */ - struct atmel_dma_buffer pdc_tx; /* PDC transmitter */ - - struct tasklet_struct tasklet; - unsigned int irq_status; - unsigned int irq_status_prev; - - struct circ_buf rx_ring; - - struct serial_rs485 rs485; /* rs485 settings */ - unsigned int tx_done_mask; -}; - -static struct atmel_uart_port atmel_ports[ATMEL_MAX_UART]; - -#ifdef SUPPORT_SYSRQ -static struct console atmel_console; -#endif - -static inline struct atmel_uart_port * -to_atmel_uart_port(struct uart_port *uart) -{ - return container_of(uart, struct atmel_uart_port, uart); -} - -#ifdef CONFIG_SERIAL_ATMEL_PDC -static bool atmel_use_dma_rx(struct uart_port *port) -{ - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - - return atmel_port->use_dma_rx; -} - -static bool atmel_use_dma_tx(struct uart_port *port) -{ - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - - return atmel_port->use_dma_tx; -} -#else -static bool atmel_use_dma_rx(struct uart_port *port) -{ - return false; -} - -static bool atmel_use_dma_tx(struct uart_port *port) -{ - return false; -} -#endif - -/* Enable or disable the rs485 support */ -void atmel_config_rs485(struct uart_port *port, struct serial_rs485 *rs485conf) -{ - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - unsigned int mode; - - spin_lock(&port->lock); - - /* Disable interrupts */ - UART_PUT_IDR(port, atmel_port->tx_done_mask); - - mode = UART_GET_MR(port); - - /* Resetting serial mode to RS232 (0x0) */ - mode &= ~ATMEL_US_USMODE; - - atmel_port->rs485 = *rs485conf; - - if (rs485conf->flags & SER_RS485_ENABLED) { - dev_dbg(port->dev, "Setting UART to RS485\n"); - atmel_port->tx_done_mask = ATMEL_US_TXEMPTY; - if (rs485conf->flags & SER_RS485_RTS_AFTER_SEND) - UART_PUT_TTGR(port, rs485conf->delay_rts_after_send); - mode |= ATMEL_US_USMODE_RS485; - } else { - dev_dbg(port->dev, "Setting UART to RS232\n"); - if (atmel_use_dma_tx(port)) - atmel_port->tx_done_mask = ATMEL_US_ENDTX | - ATMEL_US_TXBUFE; - else - atmel_port->tx_done_mask = ATMEL_US_TXRDY; - } - UART_PUT_MR(port, mode); - - /* Enable interrupts */ - UART_PUT_IER(port, atmel_port->tx_done_mask); - - spin_unlock(&port->lock); - -} - -/* - * Return TIOCSER_TEMT when transmitter FIFO and Shift register is empty. - */ -static u_int atmel_tx_empty(struct uart_port *port) -{ - return (UART_GET_CSR(port) & ATMEL_US_TXEMPTY) ? TIOCSER_TEMT : 0; -} - -/* - * Set state of the modem control output lines - */ -static void atmel_set_mctrl(struct uart_port *port, u_int mctrl) -{ - unsigned int control = 0; - unsigned int mode; - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - -#ifdef CONFIG_ARCH_AT91RM9200 - if (cpu_is_at91rm9200()) { - /* - * AT91RM9200 Errata #39: RTS0 is not internally connected - * to PA21. We need to drive the pin manually. - */ - if (port->mapbase == AT91RM9200_BASE_US0) { - if (mctrl & TIOCM_RTS) - at91_set_gpio_value(AT91_PIN_PA21, 0); - else - at91_set_gpio_value(AT91_PIN_PA21, 1); - } - } -#endif - - if (mctrl & TIOCM_RTS) - control |= ATMEL_US_RTSEN; - else - control |= ATMEL_US_RTSDIS; - - if (mctrl & TIOCM_DTR) - control |= ATMEL_US_DTREN; - else - control |= ATMEL_US_DTRDIS; - - UART_PUT_CR(port, control); - - /* Local loopback mode? */ - mode = UART_GET_MR(port) & ~ATMEL_US_CHMODE; - if (mctrl & TIOCM_LOOP) - mode |= ATMEL_US_CHMODE_LOC_LOOP; - else - mode |= ATMEL_US_CHMODE_NORMAL; - - /* Resetting serial mode to RS232 (0x0) */ - mode &= ~ATMEL_US_USMODE; - - if (atmel_port->rs485.flags & SER_RS485_ENABLED) { - dev_dbg(port->dev, "Setting UART to RS485\n"); - if (atmel_port->rs485.flags & SER_RS485_RTS_AFTER_SEND) - UART_PUT_TTGR(port, - atmel_port->rs485.delay_rts_after_send); - mode |= ATMEL_US_USMODE_RS485; - } else { - dev_dbg(port->dev, "Setting UART to RS232\n"); - } - UART_PUT_MR(port, mode); -} - -/* - * Get state of the modem control input lines - */ -static u_int atmel_get_mctrl(struct uart_port *port) -{ - unsigned int status, ret = 0; - - status = UART_GET_CSR(port); - - /* - * The control signals are active low. - */ - if (!(status & ATMEL_US_DCD)) - ret |= TIOCM_CD; - if (!(status & ATMEL_US_CTS)) - ret |= TIOCM_CTS; - if (!(status & ATMEL_US_DSR)) - ret |= TIOCM_DSR; - if (!(status & ATMEL_US_RI)) - ret |= TIOCM_RI; - - return ret; -} - -/* - * Stop transmitting. - */ -static void atmel_stop_tx(struct uart_port *port) -{ - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - - if (atmel_use_dma_tx(port)) { - /* disable PDC transmit */ - UART_PUT_PTCR(port, ATMEL_PDC_TXTDIS); - } - /* Disable interrupts */ - UART_PUT_IDR(port, atmel_port->tx_done_mask); - - if (atmel_port->rs485.flags & SER_RS485_ENABLED) - atmel_start_rx(port); -} - -/* - * Start transmitting. - */ -static void atmel_start_tx(struct uart_port *port) -{ - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - - if (atmel_use_dma_tx(port)) { - if (UART_GET_PTSR(port) & ATMEL_PDC_TXTEN) - /* The transmitter is already running. Yes, we - really need this.*/ - return; - - if (atmel_port->rs485.flags & SER_RS485_ENABLED) - atmel_stop_rx(port); - - /* re-enable PDC transmit */ - UART_PUT_PTCR(port, ATMEL_PDC_TXTEN); - } - /* Enable interrupts */ - UART_PUT_IER(port, atmel_port->tx_done_mask); -} - -/* - * start receiving - port is in process of being opened. - */ -static void atmel_start_rx(struct uart_port *port) -{ - UART_PUT_CR(port, ATMEL_US_RSTSTA); /* reset status and receiver */ - - if (atmel_use_dma_rx(port)) { - /* enable PDC controller */ - UART_PUT_IER(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT | - port->read_status_mask); - UART_PUT_PTCR(port, ATMEL_PDC_RXTEN); - } else { - UART_PUT_IER(port, ATMEL_US_RXRDY); - } -} - -/* - * Stop receiving - port is in process of being closed. - */ -static void atmel_stop_rx(struct uart_port *port) -{ - if (atmel_use_dma_rx(port)) { - /* disable PDC receive */ - UART_PUT_PTCR(port, ATMEL_PDC_RXTDIS); - UART_PUT_IDR(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT | - port->read_status_mask); - } else { - UART_PUT_IDR(port, ATMEL_US_RXRDY); - } -} - -/* - * Enable modem status interrupts - */ -static void atmel_enable_ms(struct uart_port *port) -{ - UART_PUT_IER(port, ATMEL_US_RIIC | ATMEL_US_DSRIC - | ATMEL_US_DCDIC | ATMEL_US_CTSIC); -} - -/* - * Control the transmission of a break signal - */ -static void atmel_break_ctl(struct uart_port *port, int break_state) -{ - if (break_state != 0) - UART_PUT_CR(port, ATMEL_US_STTBRK); /* start break */ - else - UART_PUT_CR(port, ATMEL_US_STPBRK); /* stop break */ -} - -/* - * Stores the incoming character in the ring buffer - */ -static void -atmel_buffer_rx_char(struct uart_port *port, unsigned int status, - unsigned int ch) -{ - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - struct circ_buf *ring = &atmel_port->rx_ring; - struct atmel_uart_char *c; - - if (!CIRC_SPACE(ring->head, ring->tail, ATMEL_SERIAL_RINGSIZE)) - /* Buffer overflow, ignore char */ - return; - - c = &((struct atmel_uart_char *)ring->buf)[ring->head]; - c->status = status; - c->ch = ch; - - /* Make sure the character is stored before we update head. */ - smp_wmb(); - - ring->head = (ring->head + 1) & (ATMEL_SERIAL_RINGSIZE - 1); -} - -/* - * Deal with parity, framing and overrun errors. - */ -static void atmel_pdc_rxerr(struct uart_port *port, unsigned int status) -{ - /* clear error */ - UART_PUT_CR(port, ATMEL_US_RSTSTA); - - if (status & ATMEL_US_RXBRK) { - /* ignore side-effect */ - status &= ~(ATMEL_US_PARE | ATMEL_US_FRAME); - port->icount.brk++; - } - if (status & ATMEL_US_PARE) - port->icount.parity++; - if (status & ATMEL_US_FRAME) - port->icount.frame++; - if (status & ATMEL_US_OVRE) - port->icount.overrun++; -} - -/* - * Characters received (called from interrupt handler) - */ -static void atmel_rx_chars(struct uart_port *port) -{ - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - unsigned int status, ch; - - status = UART_GET_CSR(port); - while (status & ATMEL_US_RXRDY) { - ch = UART_GET_CHAR(port); - - /* - * note that the error handling code is - * out of the main execution path - */ - if (unlikely(status & (ATMEL_US_PARE | ATMEL_US_FRAME - | ATMEL_US_OVRE | ATMEL_US_RXBRK) - || atmel_port->break_active)) { - - /* clear error */ - UART_PUT_CR(port, ATMEL_US_RSTSTA); - - if (status & ATMEL_US_RXBRK - && !atmel_port->break_active) { - atmel_port->break_active = 1; - UART_PUT_IER(port, ATMEL_US_RXBRK); - } else { - /* - * This is either the end-of-break - * condition or we've received at - * least one character without RXBRK - * being set. In both cases, the next - * RXBRK will indicate start-of-break. - */ - UART_PUT_IDR(port, ATMEL_US_RXBRK); - status &= ~ATMEL_US_RXBRK; - atmel_port->break_active = 0; - } - } - - atmel_buffer_rx_char(port, status, ch); - status = UART_GET_CSR(port); - } - - tasklet_schedule(&atmel_port->tasklet); -} - -/* - * Transmit characters (called from tasklet with TXRDY interrupt - * disabled) - */ -static void atmel_tx_chars(struct uart_port *port) -{ - struct circ_buf *xmit = &port->state->xmit; - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - - if (port->x_char && UART_GET_CSR(port) & atmel_port->tx_done_mask) { - UART_PUT_CHAR(port, port->x_char); - port->icount.tx++; - port->x_char = 0; - } - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) - return; - - while (UART_GET_CSR(port) & atmel_port->tx_done_mask) { - UART_PUT_CHAR(port, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - if (uart_circ_empty(xmit)) - break; - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (!uart_circ_empty(xmit)) - /* Enable interrupts */ - UART_PUT_IER(port, atmel_port->tx_done_mask); -} - -/* - * receive interrupt handler. - */ -static void -atmel_handle_receive(struct uart_port *port, unsigned int pending) -{ - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - - if (atmel_use_dma_rx(port)) { - /* - * PDC receive. Just schedule the tasklet and let it - * figure out the details. - * - * TODO: We're not handling error flags correctly at - * the moment. - */ - if (pending & (ATMEL_US_ENDRX | ATMEL_US_TIMEOUT)) { - UART_PUT_IDR(port, (ATMEL_US_ENDRX - | ATMEL_US_TIMEOUT)); - tasklet_schedule(&atmel_port->tasklet); - } - - if (pending & (ATMEL_US_RXBRK | ATMEL_US_OVRE | - ATMEL_US_FRAME | ATMEL_US_PARE)) - atmel_pdc_rxerr(port, pending); - } - - /* Interrupt receive */ - if (pending & ATMEL_US_RXRDY) - atmel_rx_chars(port); - else if (pending & ATMEL_US_RXBRK) { - /* - * End of break detected. If it came along with a - * character, atmel_rx_chars will handle it. - */ - UART_PUT_CR(port, ATMEL_US_RSTSTA); - UART_PUT_IDR(port, ATMEL_US_RXBRK); - atmel_port->break_active = 0; - } -} - -/* - * transmit interrupt handler. (Transmit is IRQF_NODELAY safe) - */ -static void -atmel_handle_transmit(struct uart_port *port, unsigned int pending) -{ - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - - if (pending & atmel_port->tx_done_mask) { - /* Either PDC or interrupt transmission */ - UART_PUT_IDR(port, atmel_port->tx_done_mask); - tasklet_schedule(&atmel_port->tasklet); - } -} - -/* - * status flags interrupt handler. - */ -static void -atmel_handle_status(struct uart_port *port, unsigned int pending, - unsigned int status) -{ - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - - if (pending & (ATMEL_US_RIIC | ATMEL_US_DSRIC | ATMEL_US_DCDIC - | ATMEL_US_CTSIC)) { - atmel_port->irq_status = status; - tasklet_schedule(&atmel_port->tasklet); - } -} - -/* - * Interrupt handler - */ -static irqreturn_t atmel_interrupt(int irq, void *dev_id) -{ - struct uart_port *port = dev_id; - unsigned int status, pending, pass_counter = 0; - - do { - status = UART_GET_CSR(port); - pending = status & UART_GET_IMR(port); - if (!pending) - break; - - atmel_handle_receive(port, pending); - atmel_handle_status(port, pending, status); - atmel_handle_transmit(port, pending); - } while (pass_counter++ < ATMEL_ISR_PASS_LIMIT); - - return pass_counter ? IRQ_HANDLED : IRQ_NONE; -} - -/* - * Called from tasklet with ENDTX and TXBUFE interrupts disabled. - */ -static void atmel_tx_dma(struct uart_port *port) -{ - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - struct circ_buf *xmit = &port->state->xmit; - struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx; - int count; - - /* nothing left to transmit? */ - if (UART_GET_TCR(port)) - return; - - xmit->tail += pdc->ofs; - xmit->tail &= UART_XMIT_SIZE - 1; - - port->icount.tx += pdc->ofs; - pdc->ofs = 0; - - /* more to transmit - setup next transfer */ - - /* disable PDC transmit */ - UART_PUT_PTCR(port, ATMEL_PDC_TXTDIS); - - if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) { - dma_sync_single_for_device(port->dev, - pdc->dma_addr, - pdc->dma_size, - DMA_TO_DEVICE); - - count = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE); - pdc->ofs = count; - - UART_PUT_TPR(port, pdc->dma_addr + xmit->tail); - UART_PUT_TCR(port, count); - /* re-enable PDC transmit */ - UART_PUT_PTCR(port, ATMEL_PDC_TXTEN); - /* Enable interrupts */ - UART_PUT_IER(port, atmel_port->tx_done_mask); - } else { - if (atmel_port->rs485.flags & SER_RS485_ENABLED) { - /* DMA done, stop TX, start RX for RS485 */ - atmel_start_rx(port); - } - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); -} - -static void atmel_rx_from_ring(struct uart_port *port) -{ - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - struct circ_buf *ring = &atmel_port->rx_ring; - unsigned int flg; - unsigned int status; - - while (ring->head != ring->tail) { - struct atmel_uart_char c; - - /* Make sure c is loaded after head. */ - smp_rmb(); - - c = ((struct atmel_uart_char *)ring->buf)[ring->tail]; - - ring->tail = (ring->tail + 1) & (ATMEL_SERIAL_RINGSIZE - 1); - - port->icount.rx++; - status = c.status; - flg = TTY_NORMAL; - - /* - * note that the error handling code is - * out of the main execution path - */ - if (unlikely(status & (ATMEL_US_PARE | ATMEL_US_FRAME - | ATMEL_US_OVRE | ATMEL_US_RXBRK))) { - if (status & ATMEL_US_RXBRK) { - /* ignore side-effect */ - status &= ~(ATMEL_US_PARE | ATMEL_US_FRAME); - - port->icount.brk++; - if (uart_handle_break(port)) - continue; - } - if (status & ATMEL_US_PARE) - port->icount.parity++; - if (status & ATMEL_US_FRAME) - port->icount.frame++; - if (status & ATMEL_US_OVRE) - port->icount.overrun++; - - status &= port->read_status_mask; - - if (status & ATMEL_US_RXBRK) - flg = TTY_BREAK; - else if (status & ATMEL_US_PARE) - flg = TTY_PARITY; - else if (status & ATMEL_US_FRAME) - flg = TTY_FRAME; - } - - - if (uart_handle_sysrq_char(port, c.ch)) - continue; - - uart_insert_char(port, status, ATMEL_US_OVRE, c.ch, flg); - } - - /* - * Drop the lock here since it might end up calling - * uart_start(), which takes the lock. - */ - spin_unlock(&port->lock); - tty_flip_buffer_push(port->state->port.tty); - spin_lock(&port->lock); -} - -static void atmel_rx_from_dma(struct uart_port *port) -{ - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - struct tty_struct *tty = port->state->port.tty; - struct atmel_dma_buffer *pdc; - int rx_idx = atmel_port->pdc_rx_idx; - unsigned int head; - unsigned int tail; - unsigned int count; - - do { - /* Reset the UART timeout early so that we don't miss one */ - UART_PUT_CR(port, ATMEL_US_STTTO); - - pdc = &atmel_port->pdc_rx[rx_idx]; - head = UART_GET_RPR(port) - pdc->dma_addr; - tail = pdc->ofs; - - /* If the PDC has switched buffers, RPR won't contain - * any address within the current buffer. Since head - * is unsigned, we just need a one-way comparison to - * find out. - * - * In this case, we just need to consume the entire - * buffer and resubmit it for DMA. This will clear the - * ENDRX bit as well, so that we can safely re-enable - * all interrupts below. - */ - head = min(head, pdc->dma_size); - - if (likely(head != tail)) { - dma_sync_single_for_cpu(port->dev, pdc->dma_addr, - pdc->dma_size, DMA_FROM_DEVICE); - - /* - * head will only wrap around when we recycle - * the DMA buffer, and when that happens, we - * explicitly set tail to 0. So head will - * always be greater than tail. - */ - count = head - tail; - - tty_insert_flip_string(tty, pdc->buf + pdc->ofs, count); - - dma_sync_single_for_device(port->dev, pdc->dma_addr, - pdc->dma_size, DMA_FROM_DEVICE); - - port->icount.rx += count; - pdc->ofs = head; - } - - /* - * If the current buffer is full, we need to check if - * the next one contains any additional data. - */ - if (head >= pdc->dma_size) { - pdc->ofs = 0; - UART_PUT_RNPR(port, pdc->dma_addr); - UART_PUT_RNCR(port, pdc->dma_size); - - rx_idx = !rx_idx; - atmel_port->pdc_rx_idx = rx_idx; - } - } while (head >= pdc->dma_size); - - /* - * Drop the lock here since it might end up calling - * uart_start(), which takes the lock. - */ - spin_unlock(&port->lock); - tty_flip_buffer_push(tty); - spin_lock(&port->lock); - - UART_PUT_IER(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT); -} - -/* - * tasklet handling tty stuff outside the interrupt handler. - */ -static void atmel_tasklet_func(unsigned long data) -{ - struct uart_port *port = (struct uart_port *)data; - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - unsigned int status; - unsigned int status_change; - - /* The interrupt handler does not take the lock */ - spin_lock(&port->lock); - - if (atmel_use_dma_tx(port)) - atmel_tx_dma(port); - else - atmel_tx_chars(port); - - status = atmel_port->irq_status; - status_change = status ^ atmel_port->irq_status_prev; - - if (status_change & (ATMEL_US_RI | ATMEL_US_DSR - | ATMEL_US_DCD | ATMEL_US_CTS)) { - /* TODO: All reads to CSR will clear these interrupts! */ - if (status_change & ATMEL_US_RI) - port->icount.rng++; - if (status_change & ATMEL_US_DSR) - port->icount.dsr++; - if (status_change & ATMEL_US_DCD) - uart_handle_dcd_change(port, !(status & ATMEL_US_DCD)); - if (status_change & ATMEL_US_CTS) - uart_handle_cts_change(port, !(status & ATMEL_US_CTS)); - - wake_up_interruptible(&port->state->port.delta_msr_wait); - - atmel_port->irq_status_prev = status; - } - - if (atmel_use_dma_rx(port)) - atmel_rx_from_dma(port); - else - atmel_rx_from_ring(port); - - spin_unlock(&port->lock); -} - -/* - * Perform initialization and enable port for reception - */ -static int atmel_startup(struct uart_port *port) -{ - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - struct tty_struct *tty = port->state->port.tty; - int retval; - - /* - * Ensure that no interrupts are enabled otherwise when - * request_irq() is called we could get stuck trying to - * handle an unexpected interrupt - */ - UART_PUT_IDR(port, -1); - - /* - * Allocate the IRQ - */ - retval = request_irq(port->irq, atmel_interrupt, IRQF_SHARED, - tty ? tty->name : "atmel_serial", port); - if (retval) { - printk("atmel_serial: atmel_startup - Can't get irq\n"); - return retval; - } - - /* - * Initialize DMA (if necessary) - */ - if (atmel_use_dma_rx(port)) { - int i; - - for (i = 0; i < 2; i++) { - struct atmel_dma_buffer *pdc = &atmel_port->pdc_rx[i]; - - pdc->buf = kmalloc(PDC_BUFFER_SIZE, GFP_KERNEL); - if (pdc->buf == NULL) { - if (i != 0) { - dma_unmap_single(port->dev, - atmel_port->pdc_rx[0].dma_addr, - PDC_BUFFER_SIZE, - DMA_FROM_DEVICE); - kfree(atmel_port->pdc_rx[0].buf); - } - free_irq(port->irq, port); - return -ENOMEM; - } - pdc->dma_addr = dma_map_single(port->dev, - pdc->buf, - PDC_BUFFER_SIZE, - DMA_FROM_DEVICE); - pdc->dma_size = PDC_BUFFER_SIZE; - pdc->ofs = 0; - } - - atmel_port->pdc_rx_idx = 0; - - UART_PUT_RPR(port, atmel_port->pdc_rx[0].dma_addr); - UART_PUT_RCR(port, PDC_BUFFER_SIZE); - - UART_PUT_RNPR(port, atmel_port->pdc_rx[1].dma_addr); - UART_PUT_RNCR(port, PDC_BUFFER_SIZE); - } - if (atmel_use_dma_tx(port)) { - struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx; - struct circ_buf *xmit = &port->state->xmit; - - pdc->buf = xmit->buf; - pdc->dma_addr = dma_map_single(port->dev, - pdc->buf, - UART_XMIT_SIZE, - DMA_TO_DEVICE); - pdc->dma_size = UART_XMIT_SIZE; - pdc->ofs = 0; - } - - /* - * If there is a specific "open" function (to register - * control line interrupts) - */ - if (atmel_open_hook) { - retval = atmel_open_hook(port); - if (retval) { - free_irq(port->irq, port); - return retval; - } - } - - /* Save current CSR for comparison in atmel_tasklet_func() */ - atmel_port->irq_status_prev = UART_GET_CSR(port); - atmel_port->irq_status = atmel_port->irq_status_prev; - - /* - * Finally, enable the serial port - */ - UART_PUT_CR(port, ATMEL_US_RSTSTA | ATMEL_US_RSTRX); - /* enable xmit & rcvr */ - UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN); - - if (atmel_use_dma_rx(port)) { - /* set UART timeout */ - UART_PUT_RTOR(port, PDC_RX_TIMEOUT); - UART_PUT_CR(port, ATMEL_US_STTTO); - - UART_PUT_IER(port, ATMEL_US_ENDRX | ATMEL_US_TIMEOUT); - /* enable PDC controller */ - UART_PUT_PTCR(port, ATMEL_PDC_RXTEN); - } else { - /* enable receive only */ - UART_PUT_IER(port, ATMEL_US_RXRDY); - } - - return 0; -} - -/* - * Disable the port - */ -static void atmel_shutdown(struct uart_port *port) -{ - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - /* - * Ensure everything is stopped. - */ - atmel_stop_rx(port); - atmel_stop_tx(port); - - /* - * Shut-down the DMA. - */ - if (atmel_use_dma_rx(port)) { - int i; - - for (i = 0; i < 2; i++) { - struct atmel_dma_buffer *pdc = &atmel_port->pdc_rx[i]; - - dma_unmap_single(port->dev, - pdc->dma_addr, - pdc->dma_size, - DMA_FROM_DEVICE); - kfree(pdc->buf); - } - } - if (atmel_use_dma_tx(port)) { - struct atmel_dma_buffer *pdc = &atmel_port->pdc_tx; - - dma_unmap_single(port->dev, - pdc->dma_addr, - pdc->dma_size, - DMA_TO_DEVICE); - } - - /* - * Disable all interrupts, port and break condition. - */ - UART_PUT_CR(port, ATMEL_US_RSTSTA); - UART_PUT_IDR(port, -1); - - /* - * Free the interrupt - */ - free_irq(port->irq, port); - - /* - * If there is a specific "close" function (to unregister - * control line interrupts) - */ - if (atmel_close_hook) - atmel_close_hook(port); -} - -/* - * Flush any TX data submitted for DMA. Called when the TX circular - * buffer is reset. - */ -static void atmel_flush_buffer(struct uart_port *port) -{ - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - - if (atmel_use_dma_tx(port)) { - UART_PUT_TCR(port, 0); - atmel_port->pdc_tx.ofs = 0; - } -} - -/* - * Power / Clock management. - */ -static void atmel_serial_pm(struct uart_port *port, unsigned int state, - unsigned int oldstate) -{ - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - - switch (state) { - case 0: - /* - * Enable the peripheral clock for this serial port. - * This is called on uart_open() or a resume event. - */ - clk_enable(atmel_port->clk); - - /* re-enable interrupts if we disabled some on suspend */ - UART_PUT_IER(port, atmel_port->backup_imr); - break; - case 3: - /* Back up the interrupt mask and disable all interrupts */ - atmel_port->backup_imr = UART_GET_IMR(port); - UART_PUT_IDR(port, -1); - - /* - * Disable the peripheral clock for this serial port. - * This is called on uart_close() or a suspend event. - */ - clk_disable(atmel_port->clk); - break; - default: - printk(KERN_ERR "atmel_serial: unknown pm %d\n", state); - } -} - -/* - * Change the port parameters - */ -static void atmel_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - unsigned long flags; - unsigned int mode, imr, quot, baud; - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - - /* Get current mode register */ - mode = UART_GET_MR(port) & ~(ATMEL_US_USCLKS | ATMEL_US_CHRL - | ATMEL_US_NBSTOP | ATMEL_US_PAR - | ATMEL_US_USMODE); - - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16); - quot = uart_get_divisor(port, baud); - - if (quot > 65535) { /* BRGR is 16-bit, so switch to slower clock */ - quot /= 8; - mode |= ATMEL_US_USCLKS_MCK_DIV8; - } - - /* byte size */ - switch (termios->c_cflag & CSIZE) { - case CS5: - mode |= ATMEL_US_CHRL_5; - break; - case CS6: - mode |= ATMEL_US_CHRL_6; - break; - case CS7: - mode |= ATMEL_US_CHRL_7; - break; - default: - mode |= ATMEL_US_CHRL_8; - break; - } - - /* stop bits */ - if (termios->c_cflag & CSTOPB) - mode |= ATMEL_US_NBSTOP_2; - - /* parity */ - if (termios->c_cflag & PARENB) { - /* Mark or Space parity */ - if (termios->c_cflag & CMSPAR) { - if (termios->c_cflag & PARODD) - mode |= ATMEL_US_PAR_MARK; - else - mode |= ATMEL_US_PAR_SPACE; - } else if (termios->c_cflag & PARODD) - mode |= ATMEL_US_PAR_ODD; - else - mode |= ATMEL_US_PAR_EVEN; - } else - mode |= ATMEL_US_PAR_NONE; - - /* hardware handshake (RTS/CTS) */ - if (termios->c_cflag & CRTSCTS) - mode |= ATMEL_US_USMODE_HWHS; - else - mode |= ATMEL_US_USMODE_NORMAL; - - spin_lock_irqsave(&port->lock, flags); - - port->read_status_mask = ATMEL_US_OVRE; - if (termios->c_iflag & INPCK) - port->read_status_mask |= (ATMEL_US_FRAME | ATMEL_US_PARE); - if (termios->c_iflag & (BRKINT | PARMRK)) - port->read_status_mask |= ATMEL_US_RXBRK; - - if (atmel_use_dma_rx(port)) - /* need to enable error interrupts */ - UART_PUT_IER(port, port->read_status_mask); - - /* - * Characters to ignore - */ - port->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= (ATMEL_US_FRAME | ATMEL_US_PARE); - if (termios->c_iflag & IGNBRK) { - port->ignore_status_mask |= ATMEL_US_RXBRK; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= ATMEL_US_OVRE; - } - /* TODO: Ignore all characters if CREAD is set.*/ - - /* update the per-port timeout */ - uart_update_timeout(port, termios->c_cflag, baud); - - /* - * save/disable interrupts. The tty layer will ensure that the - * transmitter is empty if requested by the caller, so there's - * no need to wait for it here. - */ - imr = UART_GET_IMR(port); - UART_PUT_IDR(port, -1); - - /* disable receiver and transmitter */ - UART_PUT_CR(port, ATMEL_US_TXDIS | ATMEL_US_RXDIS); - - /* Resetting serial mode to RS232 (0x0) */ - mode &= ~ATMEL_US_USMODE; - - if (atmel_port->rs485.flags & SER_RS485_ENABLED) { - dev_dbg(port->dev, "Setting UART to RS485\n"); - if (atmel_port->rs485.flags & SER_RS485_RTS_AFTER_SEND) - UART_PUT_TTGR(port, - atmel_port->rs485.delay_rts_after_send); - mode |= ATMEL_US_USMODE_RS485; - } else { - dev_dbg(port->dev, "Setting UART to RS232\n"); - } - - /* set the parity, stop bits and data size */ - UART_PUT_MR(port, mode); - - /* set the baud rate */ - UART_PUT_BRGR(port, quot); - UART_PUT_CR(port, ATMEL_US_RSTSTA | ATMEL_US_RSTRX); - UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN); - - /* restore interrupts */ - UART_PUT_IER(port, imr); - - /* CTS flow-control and modem-status interrupts */ - if (UART_ENABLE_MS(port, termios->c_cflag)) - port->ops->enable_ms(port); - - spin_unlock_irqrestore(&port->lock, flags); -} - -/* - * Return string describing the specified port - */ -static const char *atmel_type(struct uart_port *port) -{ - return (port->type == PORT_ATMEL) ? "ATMEL_SERIAL" : NULL; -} - -/* - * Release the memory region(s) being used by 'port'. - */ -static void atmel_release_port(struct uart_port *port) -{ - struct platform_device *pdev = to_platform_device(port->dev); - int size = pdev->resource[0].end - pdev->resource[0].start + 1; - - release_mem_region(port->mapbase, size); - - if (port->flags & UPF_IOREMAP) { - iounmap(port->membase); - port->membase = NULL; - } -} - -/* - * Request the memory region(s) being used by 'port'. - */ -static int atmel_request_port(struct uart_port *port) -{ - struct platform_device *pdev = to_platform_device(port->dev); - int size = pdev->resource[0].end - pdev->resource[0].start + 1; - - if (!request_mem_region(port->mapbase, size, "atmel_serial")) - return -EBUSY; - - if (port->flags & UPF_IOREMAP) { - port->membase = ioremap(port->mapbase, size); - if (port->membase == NULL) { - release_mem_region(port->mapbase, size); - return -ENOMEM; - } - } - - return 0; -} - -/* - * Configure/autoconfigure the port. - */ -static void atmel_config_port(struct uart_port *port, int flags) -{ - if (flags & UART_CONFIG_TYPE) { - port->type = PORT_ATMEL; - atmel_request_port(port); - } -} - -/* - * Verify the new serial_struct (for TIOCSSERIAL). - */ -static int atmel_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - int ret = 0; - if (ser->type != PORT_UNKNOWN && ser->type != PORT_ATMEL) - ret = -EINVAL; - if (port->irq != ser->irq) - ret = -EINVAL; - if (ser->io_type != SERIAL_IO_MEM) - ret = -EINVAL; - if (port->uartclk / 16 != ser->baud_base) - ret = -EINVAL; - if ((void *)port->mapbase != ser->iomem_base) - ret = -EINVAL; - if (port->iobase != ser->port) - ret = -EINVAL; - if (ser->hub6 != 0) - ret = -EINVAL; - return ret; -} - -#ifdef CONFIG_CONSOLE_POLL -static int atmel_poll_get_char(struct uart_port *port) -{ - while (!(UART_GET_CSR(port) & ATMEL_US_RXRDY)) - cpu_relax(); - - return UART_GET_CHAR(port); -} - -static void atmel_poll_put_char(struct uart_port *port, unsigned char ch) -{ - while (!(UART_GET_CSR(port) & ATMEL_US_TXRDY)) - cpu_relax(); - - UART_PUT_CHAR(port, ch); -} -#endif - -static int -atmel_ioctl(struct uart_port *port, unsigned int cmd, unsigned long arg) -{ - struct serial_rs485 rs485conf; - - switch (cmd) { - case TIOCSRS485: - if (copy_from_user(&rs485conf, (struct serial_rs485 *) arg, - sizeof(rs485conf))) - return -EFAULT; - - atmel_config_rs485(port, &rs485conf); - break; - - case TIOCGRS485: - if (copy_to_user((struct serial_rs485 *) arg, - &(to_atmel_uart_port(port)->rs485), - sizeof(rs485conf))) - return -EFAULT; - break; - - default: - return -ENOIOCTLCMD; - } - return 0; -} - - - -static struct uart_ops atmel_pops = { - .tx_empty = atmel_tx_empty, - .set_mctrl = atmel_set_mctrl, - .get_mctrl = atmel_get_mctrl, - .stop_tx = atmel_stop_tx, - .start_tx = atmel_start_tx, - .stop_rx = atmel_stop_rx, - .enable_ms = atmel_enable_ms, - .break_ctl = atmel_break_ctl, - .startup = atmel_startup, - .shutdown = atmel_shutdown, - .flush_buffer = atmel_flush_buffer, - .set_termios = atmel_set_termios, - .type = atmel_type, - .release_port = atmel_release_port, - .request_port = atmel_request_port, - .config_port = atmel_config_port, - .verify_port = atmel_verify_port, - .pm = atmel_serial_pm, - .ioctl = atmel_ioctl, -#ifdef CONFIG_CONSOLE_POLL - .poll_get_char = atmel_poll_get_char, - .poll_put_char = atmel_poll_put_char, -#endif -}; - -/* - * Configure the port from the platform device resource info. - */ -static void __devinit atmel_init_port(struct atmel_uart_port *atmel_port, - struct platform_device *pdev) -{ - struct uart_port *port = &atmel_port->uart; - struct atmel_uart_data *data = pdev->dev.platform_data; - - port->iotype = UPIO_MEM; - port->flags = UPF_BOOT_AUTOCONF; - port->ops = &atmel_pops; - port->fifosize = 1; - port->line = pdev->id; - port->dev = &pdev->dev; - port->mapbase = pdev->resource[0].start; - port->irq = pdev->resource[1].start; - - tasklet_init(&atmel_port->tasklet, atmel_tasklet_func, - (unsigned long)port); - - memset(&atmel_port->rx_ring, 0, sizeof(atmel_port->rx_ring)); - - if (data->regs) - /* Already mapped by setup code */ - port->membase = data->regs; - else { - port->flags |= UPF_IOREMAP; - port->membase = NULL; - } - - /* for console, the clock could already be configured */ - if (!atmel_port->clk) { - atmel_port->clk = clk_get(&pdev->dev, "usart"); - clk_enable(atmel_port->clk); - port->uartclk = clk_get_rate(atmel_port->clk); - clk_disable(atmel_port->clk); - /* only enable clock when USART is in use */ - } - - atmel_port->use_dma_rx = data->use_dma_rx; - atmel_port->use_dma_tx = data->use_dma_tx; - atmel_port->rs485 = data->rs485; - /* Use TXEMPTY for interrupt when rs485 else TXRDY or ENDTX|TXBUFE */ - if (atmel_port->rs485.flags & SER_RS485_ENABLED) - atmel_port->tx_done_mask = ATMEL_US_TXEMPTY; - else if (atmel_use_dma_tx(port)) { - port->fifosize = PDC_BUFFER_SIZE; - atmel_port->tx_done_mask = ATMEL_US_ENDTX | ATMEL_US_TXBUFE; - } else { - atmel_port->tx_done_mask = ATMEL_US_TXRDY; - } -} - -/* - * Register board-specific modem-control line handlers. - */ -void __init atmel_register_uart_fns(struct atmel_port_fns *fns) -{ - if (fns->enable_ms) - atmel_pops.enable_ms = fns->enable_ms; - if (fns->get_mctrl) - atmel_pops.get_mctrl = fns->get_mctrl; - if (fns->set_mctrl) - atmel_pops.set_mctrl = fns->set_mctrl; - atmel_open_hook = fns->open; - atmel_close_hook = fns->close; - atmel_pops.pm = fns->pm; - atmel_pops.set_wake = fns->set_wake; -} - -#ifdef CONFIG_SERIAL_ATMEL_CONSOLE -static void atmel_console_putchar(struct uart_port *port, int ch) -{ - while (!(UART_GET_CSR(port) & ATMEL_US_TXRDY)) - cpu_relax(); - UART_PUT_CHAR(port, ch); -} - -/* - * Interrupts are disabled on entering - */ -static void atmel_console_write(struct console *co, const char *s, u_int count) -{ - struct uart_port *port = &atmel_ports[co->index].uart; - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - unsigned int status, imr; - unsigned int pdc_tx; - - /* - * First, save IMR and then disable interrupts - */ - imr = UART_GET_IMR(port); - UART_PUT_IDR(port, ATMEL_US_RXRDY | atmel_port->tx_done_mask); - - /* Store PDC transmit status and disable it */ - pdc_tx = UART_GET_PTSR(port) & ATMEL_PDC_TXTEN; - UART_PUT_PTCR(port, ATMEL_PDC_TXTDIS); - - uart_console_write(port, s, count, atmel_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore IMR - */ - do { - status = UART_GET_CSR(port); - } while (!(status & ATMEL_US_TXRDY)); - - /* Restore PDC transmit status */ - if (pdc_tx) - UART_PUT_PTCR(port, ATMEL_PDC_TXTEN); - - /* set interrupts back the way they were */ - UART_PUT_IER(port, imr); -} - -/* - * If the port was already initialised (eg, by a boot loader), - * try to determine the current setup. - */ -static void __init atmel_console_get_options(struct uart_port *port, int *baud, - int *parity, int *bits) -{ - unsigned int mr, quot; - - /* - * If the baud rate generator isn't running, the port wasn't - * initialized by the boot loader. - */ - quot = UART_GET_BRGR(port) & ATMEL_US_CD; - if (!quot) - return; - - mr = UART_GET_MR(port) & ATMEL_US_CHRL; - if (mr == ATMEL_US_CHRL_8) - *bits = 8; - else - *bits = 7; - - mr = UART_GET_MR(port) & ATMEL_US_PAR; - if (mr == ATMEL_US_PAR_EVEN) - *parity = 'e'; - else if (mr == ATMEL_US_PAR_ODD) - *parity = 'o'; - - /* - * The serial core only rounds down when matching this to a - * supported baud rate. Make sure we don't end up slightly - * lower than one of those, as it would make us fall through - * to a much lower baud rate than we really want. - */ - *baud = port->uartclk / (16 * (quot - 1)); -} - -static int __init atmel_console_setup(struct console *co, char *options) -{ - struct uart_port *port = &atmel_ports[co->index].uart; - int baud = 115200; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - if (port->membase == NULL) { - /* Port not initialized yet - delay setup */ - return -ENODEV; - } - - clk_enable(atmel_ports[co->index].clk); - - UART_PUT_IDR(port, -1); - UART_PUT_CR(port, ATMEL_US_RSTSTA | ATMEL_US_RSTRX); - UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN); - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - else - atmel_console_get_options(port, &baud, &parity, &bits); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - -static struct uart_driver atmel_uart; - -static struct console atmel_console = { - .name = ATMEL_DEVICENAME, - .write = atmel_console_write, - .device = uart_console_device, - .setup = atmel_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &atmel_uart, -}; - -#define ATMEL_CONSOLE_DEVICE (&atmel_console) - -/* - * Early console initialization (before VM subsystem initialized). - */ -static int __init atmel_console_init(void) -{ - if (atmel_default_console_device) { - add_preferred_console(ATMEL_DEVICENAME, - atmel_default_console_device->id, NULL); - atmel_init_port(&atmel_ports[atmel_default_console_device->id], - atmel_default_console_device); - register_console(&atmel_console); - } - - return 0; -} - -console_initcall(atmel_console_init); - -/* - * Late console initialization. - */ -static int __init atmel_late_console_init(void) -{ - if (atmel_default_console_device - && !(atmel_console.flags & CON_ENABLED)) - register_console(&atmel_console); - - return 0; -} - -core_initcall(atmel_late_console_init); - -static inline bool atmel_is_console_port(struct uart_port *port) -{ - return port->cons && port->cons->index == port->line; -} - -#else -#define ATMEL_CONSOLE_DEVICE NULL - -static inline bool atmel_is_console_port(struct uart_port *port) -{ - return false; -} -#endif - -static struct uart_driver atmel_uart = { - .owner = THIS_MODULE, - .driver_name = "atmel_serial", - .dev_name = ATMEL_DEVICENAME, - .major = SERIAL_ATMEL_MAJOR, - .minor = MINOR_START, - .nr = ATMEL_MAX_UART, - .cons = ATMEL_CONSOLE_DEVICE, -}; - -#ifdef CONFIG_PM -static bool atmel_serial_clk_will_stop(void) -{ -#ifdef CONFIG_ARCH_AT91 - return at91_suspend_entering_slow_clock(); -#else - return false; -#endif -} - -static int atmel_serial_suspend(struct platform_device *pdev, - pm_message_t state) -{ - struct uart_port *port = platform_get_drvdata(pdev); - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - - if (atmel_is_console_port(port) && console_suspend_enabled) { - /* Drain the TX shifter */ - while (!(UART_GET_CSR(port) & ATMEL_US_TXEMPTY)) - cpu_relax(); - } - - /* we can not wake up if we're running on slow clock */ - atmel_port->may_wakeup = device_may_wakeup(&pdev->dev); - if (atmel_serial_clk_will_stop()) - device_set_wakeup_enable(&pdev->dev, 0); - - uart_suspend_port(&atmel_uart, port); - - return 0; -} - -static int atmel_serial_resume(struct platform_device *pdev) -{ - struct uart_port *port = platform_get_drvdata(pdev); - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - - uart_resume_port(&atmel_uart, port); - device_set_wakeup_enable(&pdev->dev, atmel_port->may_wakeup); - - return 0; -} -#else -#define atmel_serial_suspend NULL -#define atmel_serial_resume NULL -#endif - -static int __devinit atmel_serial_probe(struct platform_device *pdev) -{ - struct atmel_uart_port *port; - void *data; - int ret; - - BUILD_BUG_ON(ATMEL_SERIAL_RINGSIZE & (ATMEL_SERIAL_RINGSIZE - 1)); - - port = &atmel_ports[pdev->id]; - port->backup_imr = 0; - - atmel_init_port(port, pdev); - - if (!atmel_use_dma_rx(&port->uart)) { - ret = -ENOMEM; - data = kmalloc(sizeof(struct atmel_uart_char) - * ATMEL_SERIAL_RINGSIZE, GFP_KERNEL); - if (!data) - goto err_alloc_ring; - port->rx_ring.buf = data; - } - - ret = uart_add_one_port(&atmel_uart, &port->uart); - if (ret) - goto err_add_port; - -#ifdef CONFIG_SERIAL_ATMEL_CONSOLE - if (atmel_is_console_port(&port->uart) - && ATMEL_CONSOLE_DEVICE->flags & CON_ENABLED) { - /* - * The serial core enabled the clock for us, so undo - * the clk_enable() in atmel_console_setup() - */ - clk_disable(port->clk); - } -#endif - - device_init_wakeup(&pdev->dev, 1); - platform_set_drvdata(pdev, port); - - return 0; - -err_add_port: - kfree(port->rx_ring.buf); - port->rx_ring.buf = NULL; -err_alloc_ring: - if (!atmel_is_console_port(&port->uart)) { - clk_put(port->clk); - port->clk = NULL; - } - - return ret; -} - -static int __devexit atmel_serial_remove(struct platform_device *pdev) -{ - struct uart_port *port = platform_get_drvdata(pdev); - struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - int ret = 0; - - device_init_wakeup(&pdev->dev, 0); - platform_set_drvdata(pdev, NULL); - - ret = uart_remove_one_port(&atmel_uart, port); - - tasklet_kill(&atmel_port->tasklet); - kfree(atmel_port->rx_ring.buf); - - /* "port" is allocated statically, so we shouldn't free it */ - - clk_put(atmel_port->clk); - - return ret; -} - -static struct platform_driver atmel_serial_driver = { - .probe = atmel_serial_probe, - .remove = __devexit_p(atmel_serial_remove), - .suspend = atmel_serial_suspend, - .resume = atmel_serial_resume, - .driver = { - .name = "atmel_usart", - .owner = THIS_MODULE, - }, -}; - -static int __init atmel_serial_init(void) -{ - int ret; - - ret = uart_register_driver(&atmel_uart); - if (ret) - return ret; - - ret = platform_driver_register(&atmel_serial_driver); - if (ret) - uart_unregister_driver(&atmel_uart); - - return ret; -} - -static void __exit atmel_serial_exit(void) -{ - platform_driver_unregister(&atmel_serial_driver); - uart_unregister_driver(&atmel_uart); -} - -module_init(atmel_serial_init); -module_exit(atmel_serial_exit); - -MODULE_AUTHOR("Rick Bronson"); -MODULE_DESCRIPTION("Atmel AT91 / AT32 serial port driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:atmel_usart"); diff --git a/drivers/serial/bcm63xx_uart.c b/drivers/serial/bcm63xx_uart.c deleted file mode 100644 index a1a0e55d0807..000000000000 --- a/drivers/serial/bcm63xx_uart.c +++ /dev/null @@ -1,891 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Derived from many drivers using generic_serial interface. - * - * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr> - * - * Serial driver for BCM63xx integrated UART. - * - * Hardware flow control was _not_ tested since I only have RX/TX on - * my board. - */ - -#if defined(CONFIG_SERIAL_BCM63XX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/kernel.h> -#include <linux/platform_device.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/module.h> -#include <linux/console.h> -#include <linux/clk.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/sysrq.h> -#include <linux/serial.h> -#include <linux/serial_core.h> - -#include <bcm63xx_clk.h> -#include <bcm63xx_irq.h> -#include <bcm63xx_regs.h> -#include <bcm63xx_io.h> - -#define BCM63XX_NR_UARTS 2 - -static struct uart_port ports[BCM63XX_NR_UARTS]; - -/* - * rx interrupt mask / stat - * - * mask: - * - rx fifo full - * - rx fifo above threshold - * - rx fifo not empty for too long - */ -#define UART_RX_INT_MASK (UART_IR_MASK(UART_IR_RXOVER) | \ - UART_IR_MASK(UART_IR_RXTHRESH) | \ - UART_IR_MASK(UART_IR_RXTIMEOUT)) - -#define UART_RX_INT_STAT (UART_IR_STAT(UART_IR_RXOVER) | \ - UART_IR_STAT(UART_IR_RXTHRESH) | \ - UART_IR_STAT(UART_IR_RXTIMEOUT)) - -/* - * tx interrupt mask / stat - * - * mask: - * - tx fifo empty - * - tx fifo below threshold - */ -#define UART_TX_INT_MASK (UART_IR_MASK(UART_IR_TXEMPTY) | \ - UART_IR_MASK(UART_IR_TXTRESH)) - -#define UART_TX_INT_STAT (UART_IR_STAT(UART_IR_TXEMPTY) | \ - UART_IR_STAT(UART_IR_TXTRESH)) - -/* - * external input interrupt - * - * mask: any edge on CTS, DCD - */ -#define UART_EXTINP_INT_MASK (UART_EXTINP_IRMASK(UART_EXTINP_IR_CTS) | \ - UART_EXTINP_IRMASK(UART_EXTINP_IR_DCD)) - -/* - * handy uart register accessor - */ -static inline unsigned int bcm_uart_readl(struct uart_port *port, - unsigned int offset) -{ - return bcm_readl(port->membase + offset); -} - -static inline void bcm_uart_writel(struct uart_port *port, - unsigned int value, unsigned int offset) -{ - bcm_writel(value, port->membase + offset); -} - -/* - * serial core request to check if uart tx fifo is empty - */ -static unsigned int bcm_uart_tx_empty(struct uart_port *port) -{ - unsigned int val; - - val = bcm_uart_readl(port, UART_IR_REG); - return (val & UART_IR_STAT(UART_IR_TXEMPTY)) ? 1 : 0; -} - -/* - * serial core request to set RTS and DTR pin state and loopback mode - */ -static void bcm_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - unsigned int val; - - val = bcm_uart_readl(port, UART_MCTL_REG); - val &= ~(UART_MCTL_DTR_MASK | UART_MCTL_RTS_MASK); - /* invert of written value is reflected on the pin */ - if (!(mctrl & TIOCM_DTR)) - val |= UART_MCTL_DTR_MASK; - if (!(mctrl & TIOCM_RTS)) - val |= UART_MCTL_RTS_MASK; - bcm_uart_writel(port, val, UART_MCTL_REG); - - val = bcm_uart_readl(port, UART_CTL_REG); - if (mctrl & TIOCM_LOOP) - val |= UART_CTL_LOOPBACK_MASK; - else - val &= ~UART_CTL_LOOPBACK_MASK; - bcm_uart_writel(port, val, UART_CTL_REG); -} - -/* - * serial core request to return RI, CTS, DCD and DSR pin state - */ -static unsigned int bcm_uart_get_mctrl(struct uart_port *port) -{ - unsigned int val, mctrl; - - mctrl = 0; - val = bcm_uart_readl(port, UART_EXTINP_REG); - if (val & UART_EXTINP_RI_MASK) - mctrl |= TIOCM_RI; - if (val & UART_EXTINP_CTS_MASK) - mctrl |= TIOCM_CTS; - if (val & UART_EXTINP_DCD_MASK) - mctrl |= TIOCM_CD; - if (val & UART_EXTINP_DSR_MASK) - mctrl |= TIOCM_DSR; - return mctrl; -} - -/* - * serial core request to disable tx ASAP (used for flow control) - */ -static void bcm_uart_stop_tx(struct uart_port *port) -{ - unsigned int val; - - val = bcm_uart_readl(port, UART_CTL_REG); - val &= ~(UART_CTL_TXEN_MASK); - bcm_uart_writel(port, val, UART_CTL_REG); - - val = bcm_uart_readl(port, UART_IR_REG); - val &= ~UART_TX_INT_MASK; - bcm_uart_writel(port, val, UART_IR_REG); -} - -/* - * serial core request to (re)enable tx - */ -static void bcm_uart_start_tx(struct uart_port *port) -{ - unsigned int val; - - val = bcm_uart_readl(port, UART_IR_REG); - val |= UART_TX_INT_MASK; - bcm_uart_writel(port, val, UART_IR_REG); - - val = bcm_uart_readl(port, UART_CTL_REG); - val |= UART_CTL_TXEN_MASK; - bcm_uart_writel(port, val, UART_CTL_REG); -} - -/* - * serial core request to stop rx, called before port shutdown - */ -static void bcm_uart_stop_rx(struct uart_port *port) -{ - unsigned int val; - - val = bcm_uart_readl(port, UART_IR_REG); - val &= ~UART_RX_INT_MASK; - bcm_uart_writel(port, val, UART_IR_REG); -} - -/* - * serial core request to enable modem status interrupt reporting - */ -static void bcm_uart_enable_ms(struct uart_port *port) -{ - unsigned int val; - - val = bcm_uart_readl(port, UART_IR_REG); - val |= UART_IR_MASK(UART_IR_EXTIP); - bcm_uart_writel(port, val, UART_IR_REG); -} - -/* - * serial core request to start/stop emitting break char - */ -static void bcm_uart_break_ctl(struct uart_port *port, int ctl) -{ - unsigned long flags; - unsigned int val; - - spin_lock_irqsave(&port->lock, flags); - - val = bcm_uart_readl(port, UART_CTL_REG); - if (ctl) - val |= UART_CTL_XMITBRK_MASK; - else - val &= ~UART_CTL_XMITBRK_MASK; - bcm_uart_writel(port, val, UART_CTL_REG); - - spin_unlock_irqrestore(&port->lock, flags); -} - -/* - * return port type in string format - */ -static const char *bcm_uart_type(struct uart_port *port) -{ - return (port->type == PORT_BCM63XX) ? "bcm63xx_uart" : NULL; -} - -/* - * read all chars in rx fifo and send them to core - */ -static void bcm_uart_do_rx(struct uart_port *port) -{ - struct tty_struct *tty; - unsigned int max_count; - - /* limit number of char read in interrupt, should not be - * higher than fifo size anyway since we're much faster than - * serial port */ - max_count = 32; - tty = port->state->port.tty; - do { - unsigned int iestat, c, cstat; - char flag; - - /* get overrun/fifo empty information from ier - * register */ - iestat = bcm_uart_readl(port, UART_IR_REG); - if (!(iestat & UART_IR_STAT(UART_IR_RXNOTEMPTY))) - break; - - cstat = c = bcm_uart_readl(port, UART_FIFO_REG); - port->icount.rx++; - flag = TTY_NORMAL; - c &= 0xff; - - if (unlikely((cstat & UART_FIFO_ANYERR_MASK))) { - /* do stats first */ - if (cstat & UART_FIFO_BRKDET_MASK) { - port->icount.brk++; - if (uart_handle_break(port)) - continue; - } - - if (cstat & UART_FIFO_PARERR_MASK) - port->icount.parity++; - if (cstat & UART_FIFO_FRAMEERR_MASK) - port->icount.frame++; - - /* update flag wrt read_status_mask */ - cstat &= port->read_status_mask; - if (cstat & UART_FIFO_BRKDET_MASK) - flag = TTY_BREAK; - if (cstat & UART_FIFO_FRAMEERR_MASK) - flag = TTY_FRAME; - if (cstat & UART_FIFO_PARERR_MASK) - flag = TTY_PARITY; - } - - if (uart_handle_sysrq_char(port, c)) - continue; - - if (unlikely(iestat & UART_IR_STAT(UART_IR_RXOVER))) { - port->icount.overrun++; - tty_insert_flip_char(tty, 0, TTY_OVERRUN); - } - - if ((cstat & port->ignore_status_mask) == 0) - tty_insert_flip_char(tty, c, flag); - - } while (--max_count); - - tty_flip_buffer_push(tty); -} - -/* - * fill tx fifo with chars to send, stop when fifo is about to be full - * or when all chars have been sent. - */ -static void bcm_uart_do_tx(struct uart_port *port) -{ - struct circ_buf *xmit; - unsigned int val, max_count; - - if (port->x_char) { - bcm_uart_writel(port, port->x_char, UART_FIFO_REG); - port->icount.tx++; - port->x_char = 0; - return; - } - - if (uart_tx_stopped(port)) { - bcm_uart_stop_tx(port); - return; - } - - xmit = &port->state->xmit; - if (uart_circ_empty(xmit)) - goto txq_empty; - - val = bcm_uart_readl(port, UART_MCTL_REG); - val = (val & UART_MCTL_TXFIFOFILL_MASK) >> UART_MCTL_TXFIFOFILL_SHIFT; - max_count = port->fifosize - val; - - while (max_count--) { - unsigned int c; - - c = xmit->buf[xmit->tail]; - bcm_uart_writel(port, c, UART_FIFO_REG); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - if (uart_circ_empty(xmit)) - break; - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (uart_circ_empty(xmit)) - goto txq_empty; - return; - -txq_empty: - /* nothing to send, disable transmit interrupt */ - val = bcm_uart_readl(port, UART_IR_REG); - val &= ~UART_TX_INT_MASK; - bcm_uart_writel(port, val, UART_IR_REG); - return; -} - -/* - * process uart interrupt - */ -static irqreturn_t bcm_uart_interrupt(int irq, void *dev_id) -{ - struct uart_port *port; - unsigned int irqstat; - - port = dev_id; - spin_lock(&port->lock); - - irqstat = bcm_uart_readl(port, UART_IR_REG); - if (irqstat & UART_RX_INT_STAT) - bcm_uart_do_rx(port); - - if (irqstat & UART_TX_INT_STAT) - bcm_uart_do_tx(port); - - if (irqstat & UART_IR_MASK(UART_IR_EXTIP)) { - unsigned int estat; - - estat = bcm_uart_readl(port, UART_EXTINP_REG); - if (estat & UART_EXTINP_IRSTAT(UART_EXTINP_IR_CTS)) - uart_handle_cts_change(port, - estat & UART_EXTINP_CTS_MASK); - if (estat & UART_EXTINP_IRSTAT(UART_EXTINP_IR_DCD)) - uart_handle_dcd_change(port, - estat & UART_EXTINP_DCD_MASK); - } - - spin_unlock(&port->lock); - return IRQ_HANDLED; -} - -/* - * enable rx & tx operation on uart - */ -static void bcm_uart_enable(struct uart_port *port) -{ - unsigned int val; - - val = bcm_uart_readl(port, UART_CTL_REG); - val |= (UART_CTL_BRGEN_MASK | UART_CTL_TXEN_MASK | UART_CTL_RXEN_MASK); - bcm_uart_writel(port, val, UART_CTL_REG); -} - -/* - * disable rx & tx operation on uart - */ -static void bcm_uart_disable(struct uart_port *port) -{ - unsigned int val; - - val = bcm_uart_readl(port, UART_CTL_REG); - val &= ~(UART_CTL_BRGEN_MASK | UART_CTL_TXEN_MASK | - UART_CTL_RXEN_MASK); - bcm_uart_writel(port, val, UART_CTL_REG); -} - -/* - * clear all unread data in rx fifo and unsent data in tx fifo - */ -static void bcm_uart_flush(struct uart_port *port) -{ - unsigned int val; - - /* empty rx and tx fifo */ - val = bcm_uart_readl(port, UART_CTL_REG); - val |= UART_CTL_RSTRXFIFO_MASK | UART_CTL_RSTTXFIFO_MASK; - bcm_uart_writel(port, val, UART_CTL_REG); - - /* read any pending char to make sure all irq status are - * cleared */ - (void)bcm_uart_readl(port, UART_FIFO_REG); -} - -/* - * serial core request to initialize uart and start rx operation - */ -static int bcm_uart_startup(struct uart_port *port) -{ - unsigned int val; - int ret; - - /* mask all irq and flush port */ - bcm_uart_disable(port); - bcm_uart_writel(port, 0, UART_IR_REG); - bcm_uart_flush(port); - - /* clear any pending external input interrupt */ - (void)bcm_uart_readl(port, UART_EXTINP_REG); - - /* set rx/tx fifo thresh to fifo half size */ - val = bcm_uart_readl(port, UART_MCTL_REG); - val &= ~(UART_MCTL_RXFIFOTHRESH_MASK | UART_MCTL_TXFIFOTHRESH_MASK); - val |= (port->fifosize / 2) << UART_MCTL_RXFIFOTHRESH_SHIFT; - val |= (port->fifosize / 2) << UART_MCTL_TXFIFOTHRESH_SHIFT; - bcm_uart_writel(port, val, UART_MCTL_REG); - - /* set rx fifo timeout to 1 char time */ - val = bcm_uart_readl(port, UART_CTL_REG); - val &= ~UART_CTL_RXTMOUTCNT_MASK; - val |= 1 << UART_CTL_RXTMOUTCNT_SHIFT; - bcm_uart_writel(port, val, UART_CTL_REG); - - /* report any edge on dcd and cts */ - val = UART_EXTINP_INT_MASK; - val |= UART_EXTINP_DCD_NOSENSE_MASK; - val |= UART_EXTINP_CTS_NOSENSE_MASK; - bcm_uart_writel(port, val, UART_EXTINP_REG); - - /* register irq and enable rx interrupts */ - ret = request_irq(port->irq, bcm_uart_interrupt, 0, - bcm_uart_type(port), port); - if (ret) - return ret; - bcm_uart_writel(port, UART_RX_INT_MASK, UART_IR_REG); - bcm_uart_enable(port); - return 0; -} - -/* - * serial core request to flush & disable uart - */ -static void bcm_uart_shutdown(struct uart_port *port) -{ - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - bcm_uart_writel(port, 0, UART_IR_REG); - spin_unlock_irqrestore(&port->lock, flags); - - bcm_uart_disable(port); - bcm_uart_flush(port); - free_irq(port->irq, port); -} - -/* - * serial core request to change current uart setting - */ -static void bcm_uart_set_termios(struct uart_port *port, - struct ktermios *new, - struct ktermios *old) -{ - unsigned int ctl, baud, quot, ier; - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - - /* disable uart while changing speed */ - bcm_uart_disable(port); - bcm_uart_flush(port); - - /* update Control register */ - ctl = bcm_uart_readl(port, UART_CTL_REG); - ctl &= ~UART_CTL_BITSPERSYM_MASK; - - switch (new->c_cflag & CSIZE) { - case CS5: - ctl |= (0 << UART_CTL_BITSPERSYM_SHIFT); - break; - case CS6: - ctl |= (1 << UART_CTL_BITSPERSYM_SHIFT); - break; - case CS7: - ctl |= (2 << UART_CTL_BITSPERSYM_SHIFT); - break; - default: - ctl |= (3 << UART_CTL_BITSPERSYM_SHIFT); - break; - } - - ctl &= ~UART_CTL_STOPBITS_MASK; - if (new->c_cflag & CSTOPB) - ctl |= UART_CTL_STOPBITS_2; - else - ctl |= UART_CTL_STOPBITS_1; - - ctl &= ~(UART_CTL_RXPAREN_MASK | UART_CTL_TXPAREN_MASK); - if (new->c_cflag & PARENB) - ctl |= (UART_CTL_RXPAREN_MASK | UART_CTL_TXPAREN_MASK); - ctl &= ~(UART_CTL_RXPAREVEN_MASK | UART_CTL_TXPAREVEN_MASK); - if (new->c_cflag & PARODD) - ctl |= (UART_CTL_RXPAREVEN_MASK | UART_CTL_TXPAREVEN_MASK); - bcm_uart_writel(port, ctl, UART_CTL_REG); - - /* update Baudword register */ - baud = uart_get_baud_rate(port, new, old, 0, port->uartclk / 16); - quot = uart_get_divisor(port, baud) - 1; - bcm_uart_writel(port, quot, UART_BAUD_REG); - - /* update Interrupt register */ - ier = bcm_uart_readl(port, UART_IR_REG); - - ier &= ~UART_IR_MASK(UART_IR_EXTIP); - if (UART_ENABLE_MS(port, new->c_cflag)) - ier |= UART_IR_MASK(UART_IR_EXTIP); - - bcm_uart_writel(port, ier, UART_IR_REG); - - /* update read/ignore mask */ - port->read_status_mask = UART_FIFO_VALID_MASK; - if (new->c_iflag & INPCK) { - port->read_status_mask |= UART_FIFO_FRAMEERR_MASK; - port->read_status_mask |= UART_FIFO_PARERR_MASK; - } - if (new->c_iflag & (BRKINT)) - port->read_status_mask |= UART_FIFO_BRKDET_MASK; - - port->ignore_status_mask = 0; - if (new->c_iflag & IGNPAR) - port->ignore_status_mask |= UART_FIFO_PARERR_MASK; - if (new->c_iflag & IGNBRK) - port->ignore_status_mask |= UART_FIFO_BRKDET_MASK; - if (!(new->c_cflag & CREAD)) - port->ignore_status_mask |= UART_FIFO_VALID_MASK; - - uart_update_timeout(port, new->c_cflag, baud); - bcm_uart_enable(port); - spin_unlock_irqrestore(&port->lock, flags); -} - -/* - * serial core request to claim uart iomem - */ -static int bcm_uart_request_port(struct uart_port *port) -{ - unsigned int size; - - size = RSET_UART_SIZE; - if (!request_mem_region(port->mapbase, size, "bcm63xx")) { - dev_err(port->dev, "Memory region busy\n"); - return -EBUSY; - } - - port->membase = ioremap(port->mapbase, size); - if (!port->membase) { - dev_err(port->dev, "Unable to map registers\n"); - release_mem_region(port->mapbase, size); - return -EBUSY; - } - return 0; -} - -/* - * serial core request to release uart iomem - */ -static void bcm_uart_release_port(struct uart_port *port) -{ - release_mem_region(port->mapbase, RSET_UART_SIZE); - iounmap(port->membase); -} - -/* - * serial core request to do any port required autoconfiguration - */ -static void bcm_uart_config_port(struct uart_port *port, int flags) -{ - if (flags & UART_CONFIG_TYPE) { - if (bcm_uart_request_port(port)) - return; - port->type = PORT_BCM63XX; - } -} - -/* - * serial core request to check that port information in serinfo are - * suitable - */ -static int bcm_uart_verify_port(struct uart_port *port, - struct serial_struct *serinfo) -{ - if (port->type != PORT_BCM63XX) - return -EINVAL; - if (port->irq != serinfo->irq) - return -EINVAL; - if (port->iotype != serinfo->io_type) - return -EINVAL; - if (port->mapbase != (unsigned long)serinfo->iomem_base) - return -EINVAL; - return 0; -} - -/* serial core callbacks */ -static struct uart_ops bcm_uart_ops = { - .tx_empty = bcm_uart_tx_empty, - .get_mctrl = bcm_uart_get_mctrl, - .set_mctrl = bcm_uart_set_mctrl, - .start_tx = bcm_uart_start_tx, - .stop_tx = bcm_uart_stop_tx, - .stop_rx = bcm_uart_stop_rx, - .enable_ms = bcm_uart_enable_ms, - .break_ctl = bcm_uart_break_ctl, - .startup = bcm_uart_startup, - .shutdown = bcm_uart_shutdown, - .set_termios = bcm_uart_set_termios, - .type = bcm_uart_type, - .release_port = bcm_uart_release_port, - .request_port = bcm_uart_request_port, - .config_port = bcm_uart_config_port, - .verify_port = bcm_uart_verify_port, -}; - - - -#ifdef CONFIG_SERIAL_BCM63XX_CONSOLE -static inline void wait_for_xmitr(struct uart_port *port) -{ - unsigned int tmout; - - /* Wait up to 10ms for the character(s) to be sent. */ - tmout = 10000; - while (--tmout) { - unsigned int val; - - val = bcm_uart_readl(port, UART_IR_REG); - if (val & UART_IR_STAT(UART_IR_TXEMPTY)) - break; - udelay(1); - } - - /* Wait up to 1s for flow control if necessary */ - if (port->flags & UPF_CONS_FLOW) { - tmout = 1000000; - while (--tmout) { - unsigned int val; - - val = bcm_uart_readl(port, UART_EXTINP_REG); - if (val & UART_EXTINP_CTS_MASK) - break; - udelay(1); - } - } -} - -/* - * output given char - */ -static void bcm_console_putchar(struct uart_port *port, int ch) -{ - wait_for_xmitr(port); - bcm_uart_writel(port, ch, UART_FIFO_REG); -} - -/* - * console core request to output given string - */ -static void bcm_console_write(struct console *co, const char *s, - unsigned int count) -{ - struct uart_port *port; - unsigned long flags; - int locked; - - port = &ports[co->index]; - - local_irq_save(flags); - if (port->sysrq) { - /* bcm_uart_interrupt() already took the lock */ - locked = 0; - } else if (oops_in_progress) { - locked = spin_trylock(&port->lock); - } else { - spin_lock(&port->lock); - locked = 1; - } - - /* call helper to deal with \r\n */ - uart_console_write(port, s, count, bcm_console_putchar); - - /* and wait for char to be transmitted */ - wait_for_xmitr(port); - - if (locked) - spin_unlock(&port->lock); - local_irq_restore(flags); -} - -/* - * console core request to setup given console, find matching uart - * port and setup it. - */ -static int bcm_console_setup(struct console *co, char *options) -{ - struct uart_port *port; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - if (co->index < 0 || co->index >= BCM63XX_NR_UARTS) - return -EINVAL; - port = &ports[co->index]; - if (!port->membase) - return -ENODEV; - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - -static struct uart_driver bcm_uart_driver; - -static struct console bcm63xx_console = { - .name = "ttyS", - .write = bcm_console_write, - .device = uart_console_device, - .setup = bcm_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &bcm_uart_driver, -}; - -static int __init bcm63xx_console_init(void) -{ - register_console(&bcm63xx_console); - return 0; -} - -console_initcall(bcm63xx_console_init); - -#define BCM63XX_CONSOLE (&bcm63xx_console) -#else -#define BCM63XX_CONSOLE NULL -#endif /* CONFIG_SERIAL_BCM63XX_CONSOLE */ - -static struct uart_driver bcm_uart_driver = { - .owner = THIS_MODULE, - .driver_name = "bcm63xx_uart", - .dev_name = "ttyS", - .major = TTY_MAJOR, - .minor = 64, - .nr = BCM63XX_NR_UARTS, - .cons = BCM63XX_CONSOLE, -}; - -/* - * platform driver probe/remove callback - */ -static int __devinit bcm_uart_probe(struct platform_device *pdev) -{ - struct resource *res_mem, *res_irq; - struct uart_port *port; - struct clk *clk; - int ret; - - if (pdev->id < 0 || pdev->id >= BCM63XX_NR_UARTS) - return -EINVAL; - - if (ports[pdev->id].membase) - return -EBUSY; - - res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res_mem) - return -ENODEV; - - res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!res_irq) - return -ENODEV; - - clk = clk_get(&pdev->dev, "periph"); - if (IS_ERR(clk)) - return -ENODEV; - - port = &ports[pdev->id]; - memset(port, 0, sizeof(*port)); - port->iotype = UPIO_MEM; - port->mapbase = res_mem->start; - port->irq = res_irq->start; - port->ops = &bcm_uart_ops; - port->flags = UPF_BOOT_AUTOCONF; - port->dev = &pdev->dev; - port->fifosize = 16; - port->uartclk = clk_get_rate(clk) / 2; - port->line = pdev->id; - clk_put(clk); - - ret = uart_add_one_port(&bcm_uart_driver, port); - if (ret) { - ports[pdev->id].membase = 0; - return ret; - } - platform_set_drvdata(pdev, port); - return 0; -} - -static int __devexit bcm_uart_remove(struct platform_device *pdev) -{ - struct uart_port *port; - - port = platform_get_drvdata(pdev); - uart_remove_one_port(&bcm_uart_driver, port); - platform_set_drvdata(pdev, NULL); - /* mark port as free */ - ports[pdev->id].membase = 0; - return 0; -} - -/* - * platform driver stuff - */ -static struct platform_driver bcm_uart_platform_driver = { - .probe = bcm_uart_probe, - .remove = __devexit_p(bcm_uart_remove), - .driver = { - .owner = THIS_MODULE, - .name = "bcm63xx_uart", - }, -}; - -static int __init bcm_uart_init(void) -{ - int ret; - - ret = uart_register_driver(&bcm_uart_driver); - if (ret) - return ret; - - ret = platform_driver_register(&bcm_uart_platform_driver); - if (ret) - uart_unregister_driver(&bcm_uart_driver); - - return ret; -} - -static void __exit bcm_uart_exit(void) -{ - platform_driver_unregister(&bcm_uart_platform_driver); - uart_unregister_driver(&bcm_uart_driver); -} - -module_init(bcm_uart_init); -module_exit(bcm_uart_exit); - -MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>"); -MODULE_DESCRIPTION("Broadcom 63<xx integrated uart driver"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c deleted file mode 100644 index e381b895b04d..000000000000 --- a/drivers/serial/bfin_5xx.c +++ /dev/null @@ -1,1600 +0,0 @@ -/* - * Blackfin On-Chip Serial Driver - * - * Copyright 2006-2010 Analog Devices Inc. - * - * Enter bugs at http://blackfin.uclinux.org/ - * - * Licensed under the GPL-2 or later. - */ - -#if defined(CONFIG_SERIAL_BFIN_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#define DRIVER_NAME "bfin-uart" -#define pr_fmt(fmt) DRIVER_NAME ": " fmt - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/gfp.h> -#include <linux/io.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/platform_device.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/gpio.h> -#include <linux/irq.h> -#include <linux/kgdb.h> -#include <linux/slab.h> -#include <linux/dma-mapping.h> - -#include <asm/portmux.h> -#include <asm/cacheflush.h> -#include <asm/dma.h> - -#define port_membase(uart) (((struct bfin_serial_port *)(uart))->port.membase) -#define get_lsr_cache(uart) (((struct bfin_serial_port *)(uart))->lsr) -#define put_lsr_cache(uart, v) (((struct bfin_serial_port *)(uart))->lsr = (v)) -#include <asm/bfin_serial.h> - -#ifdef CONFIG_SERIAL_BFIN_MODULE -# undef CONFIG_EARLY_PRINTK -#endif - -#ifdef CONFIG_SERIAL_BFIN_MODULE -# undef CONFIG_EARLY_PRINTK -#endif - -/* UART name and device definitions */ -#define BFIN_SERIAL_DEV_NAME "ttyBF" -#define BFIN_SERIAL_MAJOR 204 -#define BFIN_SERIAL_MINOR 64 - -static struct bfin_serial_port *bfin_serial_ports[BFIN_UART_NR_PORTS]; - -#if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \ - defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE) - -# ifndef CONFIG_SERIAL_BFIN_PIO -# error KGDB only support UART in PIO mode. -# endif - -static int kgdboc_port_line; -static int kgdboc_break_enabled; -#endif -/* - * Setup for console. Argument comes from the menuconfig - */ -#define DMA_RX_XCOUNT 512 -#define DMA_RX_YCOUNT (PAGE_SIZE / DMA_RX_XCOUNT) - -#define DMA_RX_FLUSH_JIFFIES (HZ / 50) - -#ifdef CONFIG_SERIAL_BFIN_DMA -static void bfin_serial_dma_tx_chars(struct bfin_serial_port *uart); -#else -static void bfin_serial_tx_chars(struct bfin_serial_port *uart); -#endif - -static void bfin_serial_reset_irda(struct uart_port *port); - -#if defined(CONFIG_SERIAL_BFIN_CTSRTS) || \ - defined(CONFIG_SERIAL_BFIN_HARD_CTSRTS) -static unsigned int bfin_serial_get_mctrl(struct uart_port *port) -{ - struct bfin_serial_port *uart = (struct bfin_serial_port *)port; - if (uart->cts_pin < 0) - return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; - - /* CTS PIN is negative assertive. */ - if (UART_GET_CTS(uart)) - return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; - else - return TIOCM_DSR | TIOCM_CAR; -} - -static void bfin_serial_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct bfin_serial_port *uart = (struct bfin_serial_port *)port; - if (uart->rts_pin < 0) - return; - - /* RTS PIN is negative assertive. */ - if (mctrl & TIOCM_RTS) - UART_ENABLE_RTS(uart); - else - UART_DISABLE_RTS(uart); -} - -/* - * Handle any change of modem status signal. - */ -static irqreturn_t bfin_serial_mctrl_cts_int(int irq, void *dev_id) -{ - struct bfin_serial_port *uart = dev_id; - unsigned int status; - - status = bfin_serial_get_mctrl(&uart->port); - uart_handle_cts_change(&uart->port, status & TIOCM_CTS); -#ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS - uart->scts = 1; - UART_CLEAR_SCTS(uart); - UART_CLEAR_IER(uart, EDSSI); -#endif - - return IRQ_HANDLED; -} -#else -static unsigned int bfin_serial_get_mctrl(struct uart_port *port) -{ - return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; -} - -static void bfin_serial_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ -} -#endif - -/* - * interrupts are disabled on entry - */ -static void bfin_serial_stop_tx(struct uart_port *port) -{ - struct bfin_serial_port *uart = (struct bfin_serial_port *)port; -#ifdef CONFIG_SERIAL_BFIN_DMA - struct circ_buf *xmit = &uart->port.state->xmit; -#endif - - while (!(UART_GET_LSR(uart) & TEMT)) - cpu_relax(); - -#ifdef CONFIG_SERIAL_BFIN_DMA - disable_dma(uart->tx_dma_channel); - xmit->tail = (xmit->tail + uart->tx_count) & (UART_XMIT_SIZE - 1); - uart->port.icount.tx += uart->tx_count; - uart->tx_count = 0; - uart->tx_done = 1; -#else -#ifdef CONFIG_BF54x - /* Clear TFI bit */ - UART_PUT_LSR(uart, TFI); -#endif - UART_CLEAR_IER(uart, ETBEI); -#endif -} - -/* - * port is locked and interrupts are disabled - */ -static void bfin_serial_start_tx(struct uart_port *port) -{ - struct bfin_serial_port *uart = (struct bfin_serial_port *)port; - struct tty_struct *tty = uart->port.state->port.tty; - -#ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS - if (uart->scts && !(bfin_serial_get_mctrl(&uart->port) & TIOCM_CTS)) { - uart->scts = 0; - uart_handle_cts_change(&uart->port, uart->scts); - } -#endif - - /* - * To avoid losting RX interrupt, we reset IR function - * before sending data. - */ - if (tty->termios->c_line == N_IRDA) - bfin_serial_reset_irda(port); - -#ifdef CONFIG_SERIAL_BFIN_DMA - if (uart->tx_done) - bfin_serial_dma_tx_chars(uart); -#else - UART_SET_IER(uart, ETBEI); - bfin_serial_tx_chars(uart); -#endif -} - -/* - * Interrupts are enabled - */ -static void bfin_serial_stop_rx(struct uart_port *port) -{ - struct bfin_serial_port *uart = (struct bfin_serial_port *)port; - - UART_CLEAR_IER(uart, ERBFI); -} - -/* - * Set the modem control timer to fire immediately. - */ -static void bfin_serial_enable_ms(struct uart_port *port) -{ -} - - -#if ANOMALY_05000363 && defined(CONFIG_SERIAL_BFIN_PIO) -# define UART_GET_ANOMALY_THRESHOLD(uart) ((uart)->anomaly_threshold) -# define UART_SET_ANOMALY_THRESHOLD(uart, v) ((uart)->anomaly_threshold = (v)) -#else -# define UART_GET_ANOMALY_THRESHOLD(uart) 0 -# define UART_SET_ANOMALY_THRESHOLD(uart, v) -#endif - -#ifdef CONFIG_SERIAL_BFIN_PIO -static void bfin_serial_rx_chars(struct bfin_serial_port *uart) -{ - struct tty_struct *tty = NULL; - unsigned int status, ch, flg; - static struct timeval anomaly_start = { .tv_sec = 0 }; - - status = UART_GET_LSR(uart); - UART_CLEAR_LSR(uart); - - ch = UART_GET_CHAR(uart); - uart->port.icount.rx++; - -#if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \ - defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE) - if (kgdb_connected && kgdboc_port_line == uart->port.line - && kgdboc_break_enabled) - if (ch == 0x3) {/* Ctrl + C */ - kgdb_breakpoint(); - return; - } - - if (!uart->port.state || !uart->port.state->port.tty) - return; -#endif - tty = uart->port.state->port.tty; - - if (ANOMALY_05000363) { - /* The BF533 (and BF561) family of processors have a nice anomaly - * where they continuously generate characters for a "single" break. - * We have to basically ignore this flood until the "next" valid - * character comes across. Due to the nature of the flood, it is - * not possible to reliably catch bytes that are sent too quickly - * after this break. So application code talking to the Blackfin - * which sends a break signal must allow at least 1.5 character - * times after the end of the break for things to stabilize. This - * timeout was picked as it must absolutely be larger than 1 - * character time +/- some percent. So 1.5 sounds good. All other - * Blackfin families operate properly. Woo. - */ - if (anomaly_start.tv_sec) { - struct timeval curr; - suseconds_t usecs; - - if ((~ch & (~ch + 1)) & 0xff) - goto known_good_char; - - do_gettimeofday(&curr); - if (curr.tv_sec - anomaly_start.tv_sec > 1) - goto known_good_char; - - usecs = 0; - if (curr.tv_sec != anomaly_start.tv_sec) - usecs += USEC_PER_SEC; - usecs += curr.tv_usec - anomaly_start.tv_usec; - - if (usecs > UART_GET_ANOMALY_THRESHOLD(uart)) - goto known_good_char; - - if (ch) - anomaly_start.tv_sec = 0; - else - anomaly_start = curr; - - return; - - known_good_char: - status &= ~BI; - anomaly_start.tv_sec = 0; - } - } - - if (status & BI) { - if (ANOMALY_05000363) - if (bfin_revid() < 5) - do_gettimeofday(&anomaly_start); - uart->port.icount.brk++; - if (uart_handle_break(&uart->port)) - goto ignore_char; - status &= ~(PE | FE); - } - if (status & PE) - uart->port.icount.parity++; - if (status & OE) - uart->port.icount.overrun++; - if (status & FE) - uart->port.icount.frame++; - - status &= uart->port.read_status_mask; - - if (status & BI) - flg = TTY_BREAK; - else if (status & PE) - flg = TTY_PARITY; - else if (status & FE) - flg = TTY_FRAME; - else - flg = TTY_NORMAL; - - if (uart_handle_sysrq_char(&uart->port, ch)) - goto ignore_char; - - uart_insert_char(&uart->port, status, OE, ch, flg); - - ignore_char: - tty_flip_buffer_push(tty); -} - -static void bfin_serial_tx_chars(struct bfin_serial_port *uart) -{ - struct circ_buf *xmit = &uart->port.state->xmit; - - if (uart_circ_empty(xmit) || uart_tx_stopped(&uart->port)) { -#ifdef CONFIG_BF54x - /* Clear TFI bit */ - UART_PUT_LSR(uart, TFI); -#endif - /* Anomaly notes: - * 05000215 - we always clear ETBEI within last UART TX - * interrupt to end a string. It is always set - * when start a new tx. - */ - UART_CLEAR_IER(uart, ETBEI); - return; - } - - if (uart->port.x_char) { - UART_PUT_CHAR(uart, uart->port.x_char); - uart->port.icount.tx++; - uart->port.x_char = 0; - } - - while ((UART_GET_LSR(uart) & THRE) && xmit->tail != xmit->head) { - UART_PUT_CHAR(uart, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - uart->port.icount.tx++; - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&uart->port); -} - -static irqreturn_t bfin_serial_rx_int(int irq, void *dev_id) -{ - struct bfin_serial_port *uart = dev_id; - - spin_lock(&uart->port.lock); - while (UART_GET_LSR(uart) & DR) - bfin_serial_rx_chars(uart); - spin_unlock(&uart->port.lock); - - return IRQ_HANDLED; -} - -static irqreturn_t bfin_serial_tx_int(int irq, void *dev_id) -{ - struct bfin_serial_port *uart = dev_id; - -#ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS - if (uart->scts && !(bfin_serial_get_mctrl(&uart->port) & TIOCM_CTS)) { - uart->scts = 0; - uart_handle_cts_change(&uart->port, uart->scts); - } -#endif - spin_lock(&uart->port.lock); - if (UART_GET_LSR(uart) & THRE) - bfin_serial_tx_chars(uart); - spin_unlock(&uart->port.lock); - - return IRQ_HANDLED; -} -#endif - -#ifdef CONFIG_SERIAL_BFIN_DMA -static void bfin_serial_dma_tx_chars(struct bfin_serial_port *uart) -{ - struct circ_buf *xmit = &uart->port.state->xmit; - - uart->tx_done = 0; - - if (uart_circ_empty(xmit) || uart_tx_stopped(&uart->port)) { - uart->tx_count = 0; - uart->tx_done = 1; - return; - } - - if (uart->port.x_char) { - UART_PUT_CHAR(uart, uart->port.x_char); - uart->port.icount.tx++; - uart->port.x_char = 0; - } - - uart->tx_count = CIRC_CNT(xmit->head, xmit->tail, UART_XMIT_SIZE); - if (uart->tx_count > (UART_XMIT_SIZE - xmit->tail)) - uart->tx_count = UART_XMIT_SIZE - xmit->tail; - blackfin_dcache_flush_range((unsigned long)(xmit->buf+xmit->tail), - (unsigned long)(xmit->buf+xmit->tail+uart->tx_count)); - set_dma_config(uart->tx_dma_channel, - set_bfin_dma_config(DIR_READ, DMA_FLOW_STOP, - INTR_ON_BUF, - DIMENSION_LINEAR, - DATA_SIZE_8, - DMA_SYNC_RESTART)); - set_dma_start_addr(uart->tx_dma_channel, (unsigned long)(xmit->buf+xmit->tail)); - set_dma_x_count(uart->tx_dma_channel, uart->tx_count); - set_dma_x_modify(uart->tx_dma_channel, 1); - SSYNC(); - enable_dma(uart->tx_dma_channel); - - UART_SET_IER(uart, ETBEI); -} - -static void bfin_serial_dma_rx_chars(struct bfin_serial_port *uart) -{ - struct tty_struct *tty = uart->port.state->port.tty; - int i, flg, status; - - status = UART_GET_LSR(uart); - UART_CLEAR_LSR(uart); - - uart->port.icount.rx += - CIRC_CNT(uart->rx_dma_buf.head, uart->rx_dma_buf.tail, - UART_XMIT_SIZE); - - if (status & BI) { - uart->port.icount.brk++; - if (uart_handle_break(&uart->port)) - goto dma_ignore_char; - status &= ~(PE | FE); - } - if (status & PE) - uart->port.icount.parity++; - if (status & OE) - uart->port.icount.overrun++; - if (status & FE) - uart->port.icount.frame++; - - status &= uart->port.read_status_mask; - - if (status & BI) - flg = TTY_BREAK; - else if (status & PE) - flg = TTY_PARITY; - else if (status & FE) - flg = TTY_FRAME; - else - flg = TTY_NORMAL; - - for (i = uart->rx_dma_buf.tail; ; i++) { - if (i >= UART_XMIT_SIZE) - i = 0; - if (i == uart->rx_dma_buf.head) - break; - if (!uart_handle_sysrq_char(&uart->port, uart->rx_dma_buf.buf[i])) - uart_insert_char(&uart->port, status, OE, - uart->rx_dma_buf.buf[i], flg); - } - - dma_ignore_char: - tty_flip_buffer_push(tty); -} - -void bfin_serial_rx_dma_timeout(struct bfin_serial_port *uart) -{ - int x_pos, pos; - - dma_disable_irq(uart->tx_dma_channel); - dma_disable_irq(uart->rx_dma_channel); - spin_lock_bh(&uart->port.lock); - - /* 2D DMA RX buffer ring is used. Because curr_y_count and - * curr_x_count can't be read as an atomic operation, - * curr_y_count should be read before curr_x_count. When - * curr_x_count is read, curr_y_count may already indicate - * next buffer line. But, the position calculated here is - * still indicate the old line. The wrong position data may - * be smaller than current buffer tail, which cause garbages - * are received if it is not prohibit. - */ - uart->rx_dma_nrows = get_dma_curr_ycount(uart->rx_dma_channel); - x_pos = get_dma_curr_xcount(uart->rx_dma_channel); - uart->rx_dma_nrows = DMA_RX_YCOUNT - uart->rx_dma_nrows; - if (uart->rx_dma_nrows == DMA_RX_YCOUNT || x_pos == 0) - uart->rx_dma_nrows = 0; - x_pos = DMA_RX_XCOUNT - x_pos; - if (x_pos == DMA_RX_XCOUNT) - x_pos = 0; - - pos = uart->rx_dma_nrows * DMA_RX_XCOUNT + x_pos; - /* Ignore receiving data if new position is in the same line of - * current buffer tail and small. - */ - if (pos > uart->rx_dma_buf.tail || - uart->rx_dma_nrows < (uart->rx_dma_buf.tail/DMA_RX_XCOUNT)) { - uart->rx_dma_buf.head = pos; - bfin_serial_dma_rx_chars(uart); - uart->rx_dma_buf.tail = uart->rx_dma_buf.head; - } - - spin_unlock_bh(&uart->port.lock); - dma_enable_irq(uart->tx_dma_channel); - dma_enable_irq(uart->rx_dma_channel); - - mod_timer(&(uart->rx_dma_timer), jiffies + DMA_RX_FLUSH_JIFFIES); -} - -static irqreturn_t bfin_serial_dma_tx_int(int irq, void *dev_id) -{ - struct bfin_serial_port *uart = dev_id; - struct circ_buf *xmit = &uart->port.state->xmit; - -#ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS - if (uart->scts && !(bfin_serial_get_mctrl(&uart->port)&TIOCM_CTS)) { - uart->scts = 0; - uart_handle_cts_change(&uart->port, uart->scts); - } -#endif - - spin_lock(&uart->port.lock); - if (!(get_dma_curr_irqstat(uart->tx_dma_channel)&DMA_RUN)) { - disable_dma(uart->tx_dma_channel); - clear_dma_irqstat(uart->tx_dma_channel); - /* Anomaly notes: - * 05000215 - we always clear ETBEI within last UART TX - * interrupt to end a string. It is always set - * when start a new tx. - */ - UART_CLEAR_IER(uart, ETBEI); - xmit->tail = (xmit->tail + uart->tx_count) & (UART_XMIT_SIZE - 1); - uart->port.icount.tx += uart->tx_count; - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&uart->port); - - bfin_serial_dma_tx_chars(uart); - } - - spin_unlock(&uart->port.lock); - return IRQ_HANDLED; -} - -static irqreturn_t bfin_serial_dma_rx_int(int irq, void *dev_id) -{ - struct bfin_serial_port *uart = dev_id; - unsigned short irqstat; - int x_pos, pos; - - spin_lock(&uart->port.lock); - irqstat = get_dma_curr_irqstat(uart->rx_dma_channel); - clear_dma_irqstat(uart->rx_dma_channel); - - uart->rx_dma_nrows = get_dma_curr_ycount(uart->rx_dma_channel); - x_pos = get_dma_curr_xcount(uart->rx_dma_channel); - uart->rx_dma_nrows = DMA_RX_YCOUNT - uart->rx_dma_nrows; - if (uart->rx_dma_nrows == DMA_RX_YCOUNT || x_pos == 0) - uart->rx_dma_nrows = 0; - - pos = uart->rx_dma_nrows * DMA_RX_XCOUNT; - if (pos > uart->rx_dma_buf.tail || - uart->rx_dma_nrows < (uart->rx_dma_buf.tail/DMA_RX_XCOUNT)) { - uart->rx_dma_buf.head = pos; - bfin_serial_dma_rx_chars(uart); - uart->rx_dma_buf.tail = uart->rx_dma_buf.head; - } - - spin_unlock(&uart->port.lock); - - return IRQ_HANDLED; -} -#endif - -/* - * Return TIOCSER_TEMT when transmitter is not busy. - */ -static unsigned int bfin_serial_tx_empty(struct uart_port *port) -{ - struct bfin_serial_port *uart = (struct bfin_serial_port *)port; - unsigned short lsr; - - lsr = UART_GET_LSR(uart); - if (lsr & TEMT) - return TIOCSER_TEMT; - else - return 0; -} - -static void bfin_serial_break_ctl(struct uart_port *port, int break_state) -{ - struct bfin_serial_port *uart = (struct bfin_serial_port *)port; - u16 lcr = UART_GET_LCR(uart); - if (break_state) - lcr |= SB; - else - lcr &= ~SB; - UART_PUT_LCR(uart, lcr); - SSYNC(); -} - -static int bfin_serial_startup(struct uart_port *port) -{ - struct bfin_serial_port *uart = (struct bfin_serial_port *)port; - -#ifdef CONFIG_SERIAL_BFIN_DMA - dma_addr_t dma_handle; - - if (request_dma(uart->rx_dma_channel, "BFIN_UART_RX") < 0) { - printk(KERN_NOTICE "Unable to attach Blackfin UART RX DMA channel\n"); - return -EBUSY; - } - - if (request_dma(uart->tx_dma_channel, "BFIN_UART_TX") < 0) { - printk(KERN_NOTICE "Unable to attach Blackfin UART TX DMA channel\n"); - free_dma(uart->rx_dma_channel); - return -EBUSY; - } - - set_dma_callback(uart->rx_dma_channel, bfin_serial_dma_rx_int, uart); - set_dma_callback(uart->tx_dma_channel, bfin_serial_dma_tx_int, uart); - - uart->rx_dma_buf.buf = (unsigned char *)dma_alloc_coherent(NULL, PAGE_SIZE, &dma_handle, GFP_DMA); - uart->rx_dma_buf.head = 0; - uart->rx_dma_buf.tail = 0; - uart->rx_dma_nrows = 0; - - set_dma_config(uart->rx_dma_channel, - set_bfin_dma_config(DIR_WRITE, DMA_FLOW_AUTO, - INTR_ON_ROW, DIMENSION_2D, - DATA_SIZE_8, - DMA_SYNC_RESTART)); - set_dma_x_count(uart->rx_dma_channel, DMA_RX_XCOUNT); - set_dma_x_modify(uart->rx_dma_channel, 1); - set_dma_y_count(uart->rx_dma_channel, DMA_RX_YCOUNT); - set_dma_y_modify(uart->rx_dma_channel, 1); - set_dma_start_addr(uart->rx_dma_channel, (unsigned long)uart->rx_dma_buf.buf); - enable_dma(uart->rx_dma_channel); - - uart->rx_dma_timer.data = (unsigned long)(uart); - uart->rx_dma_timer.function = (void *)bfin_serial_rx_dma_timeout; - uart->rx_dma_timer.expires = jiffies + DMA_RX_FLUSH_JIFFIES; - add_timer(&(uart->rx_dma_timer)); -#else -# if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \ - defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE) - if (kgdboc_port_line == uart->port.line && kgdboc_break_enabled) - kgdboc_break_enabled = 0; - else { -# endif - if (request_irq(uart->port.irq, bfin_serial_rx_int, IRQF_DISABLED, - "BFIN_UART_RX", uart)) { - printk(KERN_NOTICE "Unable to attach BlackFin UART RX interrupt\n"); - return -EBUSY; - } - - if (request_irq - (uart->port.irq+1, bfin_serial_tx_int, IRQF_DISABLED, - "BFIN_UART_TX", uart)) { - printk(KERN_NOTICE "Unable to attach BlackFin UART TX interrupt\n"); - free_irq(uart->port.irq, uart); - return -EBUSY; - } - -# ifdef CONFIG_BF54x - { - /* - * UART2 and UART3 on BF548 share interrupt PINs and DMA - * controllers with SPORT2 and SPORT3. UART rx and tx - * interrupts are generated in PIO mode only when configure - * their peripheral mapping registers properly, which means - * request corresponding DMA channels in PIO mode as well. - */ - unsigned uart_dma_ch_rx, uart_dma_ch_tx; - - switch (uart->port.irq) { - case IRQ_UART3_RX: - uart_dma_ch_rx = CH_UART3_RX; - uart_dma_ch_tx = CH_UART3_TX; - break; - case IRQ_UART2_RX: - uart_dma_ch_rx = CH_UART2_RX; - uart_dma_ch_tx = CH_UART2_TX; - break; - default: - uart_dma_ch_rx = uart_dma_ch_tx = 0; - break; - }; - - if (uart_dma_ch_rx && - request_dma(uart_dma_ch_rx, "BFIN_UART_RX") < 0) { - printk(KERN_NOTICE"Fail to attach UART interrupt\n"); - free_irq(uart->port.irq, uart); - free_irq(uart->port.irq + 1, uart); - return -EBUSY; - } - if (uart_dma_ch_tx && - request_dma(uart_dma_ch_tx, "BFIN_UART_TX") < 0) { - printk(KERN_NOTICE "Fail to attach UART interrupt\n"); - free_dma(uart_dma_ch_rx); - free_irq(uart->port.irq, uart); - free_irq(uart->port.irq + 1, uart); - return -EBUSY; - } - } -# endif -# if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \ - defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE) - } -# endif -#endif - -#ifdef CONFIG_SERIAL_BFIN_CTSRTS - if (uart->cts_pin >= 0) { - if (request_irq(gpio_to_irq(uart->cts_pin), - bfin_serial_mctrl_cts_int, - IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | - IRQF_DISABLED, "BFIN_UART_CTS", uart)) { - uart->cts_pin = -1; - pr_info("Unable to attach BlackFin UART CTS interrupt. So, disable it.\n"); - } - } - if (uart->rts_pin >= 0) { - gpio_direction_output(uart->rts_pin, 0); - } -#endif -#ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS - if (uart->cts_pin >= 0 && request_irq(uart->status_irq, - bfin_serial_mctrl_cts_int, - IRQF_DISABLED, "BFIN_UART_MODEM_STATUS", uart)) { - uart->cts_pin = -1; - pr_info("Unable to attach BlackFin UART Modem Status interrupt.\n"); - } - - /* CTS RTS PINs are negative assertive. */ - UART_PUT_MCR(uart, ACTS); - UART_SET_IER(uart, EDSSI); -#endif - - UART_SET_IER(uart, ERBFI); - return 0; -} - -static void bfin_serial_shutdown(struct uart_port *port) -{ - struct bfin_serial_port *uart = (struct bfin_serial_port *)port; - -#ifdef CONFIG_SERIAL_BFIN_DMA - disable_dma(uart->tx_dma_channel); - free_dma(uart->tx_dma_channel); - disable_dma(uart->rx_dma_channel); - free_dma(uart->rx_dma_channel); - del_timer(&(uart->rx_dma_timer)); - dma_free_coherent(NULL, PAGE_SIZE, uart->rx_dma_buf.buf, 0); -#else -#ifdef CONFIG_BF54x - switch (uart->port.irq) { - case IRQ_UART3_RX: - free_dma(CH_UART3_RX); - free_dma(CH_UART3_TX); - break; - case IRQ_UART2_RX: - free_dma(CH_UART2_RX); - free_dma(CH_UART2_TX); - break; - default: - break; - }; -#endif - free_irq(uart->port.irq, uart); - free_irq(uart->port.irq+1, uart); -#endif - -#ifdef CONFIG_SERIAL_BFIN_CTSRTS - if (uart->cts_pin >= 0) - free_irq(gpio_to_irq(uart->cts_pin), uart); -#endif -#ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS - if (uart->cts_pin >= 0) - free_irq(uart->status_irq, uart); -#endif -} - -static void -bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct bfin_serial_port *uart = (struct bfin_serial_port *)port; - unsigned long flags; - unsigned int baud, quot; - unsigned short val, ier, lcr = 0; - - switch (termios->c_cflag & CSIZE) { - case CS8: - lcr = WLS(8); - break; - case CS7: - lcr = WLS(7); - break; - case CS6: - lcr = WLS(6); - break; - case CS5: - lcr = WLS(5); - break; - default: - printk(KERN_ERR "%s: word lengh not supported\n", - __func__); - } - - /* Anomaly notes: - * 05000231 - STOP bit is always set to 1 whatever the user is set. - */ - if (termios->c_cflag & CSTOPB) { - if (ANOMALY_05000231) - printk(KERN_WARNING "STOP bits other than 1 is not " - "supported in case of anomaly 05000231.\n"); - else - lcr |= STB; - } - if (termios->c_cflag & PARENB) - lcr |= PEN; - if (!(termios->c_cflag & PARODD)) - lcr |= EPS; - if (termios->c_cflag & CMSPAR) - lcr |= STP; - - spin_lock_irqsave(&uart->port.lock, flags); - - port->read_status_mask = OE; - if (termios->c_iflag & INPCK) - port->read_status_mask |= (FE | PE); - if (termios->c_iflag & (BRKINT | PARMRK)) - port->read_status_mask |= BI; - - /* - * Characters to ignore - */ - port->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= FE | PE; - if (termios->c_iflag & IGNBRK) { - port->ignore_status_mask |= BI; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= OE; - } - - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); - quot = uart_get_divisor(port, baud); - - /* If discipline is not IRDA, apply ANOMALY_05000230 */ - if (termios->c_line != N_IRDA) - quot -= ANOMALY_05000230; - - UART_SET_ANOMALY_THRESHOLD(uart, USEC_PER_SEC / baud * 15); - - /* Disable UART */ - ier = UART_GET_IER(uart); - UART_DISABLE_INTS(uart); - - /* Set DLAB in LCR to Access DLL and DLH */ - UART_SET_DLAB(uart); - - UART_PUT_DLL(uart, quot & 0xFF); - UART_PUT_DLH(uart, (quot >> 8) & 0xFF); - SSYNC(); - - /* Clear DLAB in LCR to Access THR RBR IER */ - UART_CLEAR_DLAB(uart); - - UART_PUT_LCR(uart, lcr); - - /* Enable UART */ - UART_ENABLE_INTS(uart, ier); - - val = UART_GET_GCTL(uart); - val |= UCEN; - UART_PUT_GCTL(uart, val); - - /* Port speed changed, update the per-port timeout. */ - uart_update_timeout(port, termios->c_cflag, baud); - - spin_unlock_irqrestore(&uart->port.lock, flags); -} - -static const char *bfin_serial_type(struct uart_port *port) -{ - struct bfin_serial_port *uart = (struct bfin_serial_port *)port; - - return uart->port.type == PORT_BFIN ? "BFIN-UART" : NULL; -} - -/* - * Release the memory region(s) being used by 'port'. - */ -static void bfin_serial_release_port(struct uart_port *port) -{ -} - -/* - * Request the memory region(s) being used by 'port'. - */ -static int bfin_serial_request_port(struct uart_port *port) -{ - return 0; -} - -/* - * Configure/autoconfigure the port. - */ -static void bfin_serial_config_port(struct uart_port *port, int flags) -{ - struct bfin_serial_port *uart = (struct bfin_serial_port *)port; - - if (flags & UART_CONFIG_TYPE && - bfin_serial_request_port(&uart->port) == 0) - uart->port.type = PORT_BFIN; -} - -/* - * Verify the new serial_struct (for TIOCSSERIAL). - * The only change we allow are to the flags and type, and - * even then only between PORT_BFIN and PORT_UNKNOWN - */ -static int -bfin_serial_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - return 0; -} - -/* - * Enable the IrDA function if tty->ldisc.num is N_IRDA. - * In other cases, disable IrDA function. - */ -static void bfin_serial_set_ldisc(struct uart_port *port, int ld) -{ - struct bfin_serial_port *uart = (struct bfin_serial_port *)port; - unsigned short val; - - switch (ld) { - case N_IRDA: - val = UART_GET_GCTL(uart); - val |= (IREN | RPOLC); - UART_PUT_GCTL(uart, val); - break; - default: - val = UART_GET_GCTL(uart); - val &= ~(IREN | RPOLC); - UART_PUT_GCTL(uart, val); - } -} - -static void bfin_serial_reset_irda(struct uart_port *port) -{ - struct bfin_serial_port *uart = (struct bfin_serial_port *)port; - unsigned short val; - - val = UART_GET_GCTL(uart); - val &= ~(IREN | RPOLC); - UART_PUT_GCTL(uart, val); - SSYNC(); - val |= (IREN | RPOLC); - UART_PUT_GCTL(uart, val); - SSYNC(); -} - -#ifdef CONFIG_CONSOLE_POLL -/* Anomaly notes: - * 05000099 - Because we only use THRE in poll_put and DR in poll_get, - * losing other bits of UART_LSR is not a problem here. - */ -static void bfin_serial_poll_put_char(struct uart_port *port, unsigned char chr) -{ - struct bfin_serial_port *uart = (struct bfin_serial_port *)port; - - while (!(UART_GET_LSR(uart) & THRE)) - cpu_relax(); - - UART_CLEAR_DLAB(uart); - UART_PUT_CHAR(uart, (unsigned char)chr); -} - -static int bfin_serial_poll_get_char(struct uart_port *port) -{ - struct bfin_serial_port *uart = (struct bfin_serial_port *)port; - unsigned char chr; - - while (!(UART_GET_LSR(uart) & DR)) - cpu_relax(); - - UART_CLEAR_DLAB(uart); - chr = UART_GET_CHAR(uart); - - return chr; -} -#endif - -#if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \ - defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE) -static void bfin_kgdboc_port_shutdown(struct uart_port *port) -{ - if (kgdboc_break_enabled) { - kgdboc_break_enabled = 0; - bfin_serial_shutdown(port); - } -} - -static int bfin_kgdboc_port_startup(struct uart_port *port) -{ - kgdboc_port_line = port->line; - kgdboc_break_enabled = !bfin_serial_startup(port); - return 0; -} -#endif - -static struct uart_ops bfin_serial_pops = { - .tx_empty = bfin_serial_tx_empty, - .set_mctrl = bfin_serial_set_mctrl, - .get_mctrl = bfin_serial_get_mctrl, - .stop_tx = bfin_serial_stop_tx, - .start_tx = bfin_serial_start_tx, - .stop_rx = bfin_serial_stop_rx, - .enable_ms = bfin_serial_enable_ms, - .break_ctl = bfin_serial_break_ctl, - .startup = bfin_serial_startup, - .shutdown = bfin_serial_shutdown, - .set_termios = bfin_serial_set_termios, - .set_ldisc = bfin_serial_set_ldisc, - .type = bfin_serial_type, - .release_port = bfin_serial_release_port, - .request_port = bfin_serial_request_port, - .config_port = bfin_serial_config_port, - .verify_port = bfin_serial_verify_port, -#if defined(CONFIG_KGDB_SERIAL_CONSOLE) || \ - defined(CONFIG_KGDB_SERIAL_CONSOLE_MODULE) - .kgdboc_port_startup = bfin_kgdboc_port_startup, - .kgdboc_port_shutdown = bfin_kgdboc_port_shutdown, -#endif -#ifdef CONFIG_CONSOLE_POLL - .poll_put_char = bfin_serial_poll_put_char, - .poll_get_char = bfin_serial_poll_get_char, -#endif -}; - -#if defined(CONFIG_SERIAL_BFIN_CONSOLE) || defined(CONFIG_EARLY_PRINTK) -/* - * If the port was already initialised (eg, by a boot loader), - * try to determine the current setup. - */ -static void __init -bfin_serial_console_get_options(struct bfin_serial_port *uart, int *baud, - int *parity, int *bits) -{ - unsigned short status; - - status = UART_GET_IER(uart) & (ERBFI | ETBEI); - if (status == (ERBFI | ETBEI)) { - /* ok, the port was enabled */ - u16 lcr, dlh, dll; - - lcr = UART_GET_LCR(uart); - - *parity = 'n'; - if (lcr & PEN) { - if (lcr & EPS) - *parity = 'e'; - else - *parity = 'o'; - } - switch (lcr & 0x03) { - case 0: *bits = 5; break; - case 1: *bits = 6; break; - case 2: *bits = 7; break; - case 3: *bits = 8; break; - } - /* Set DLAB in LCR to Access DLL and DLH */ - UART_SET_DLAB(uart); - - dll = UART_GET_DLL(uart); - dlh = UART_GET_DLH(uart); - - /* Clear DLAB in LCR to Access THR RBR IER */ - UART_CLEAR_DLAB(uart); - - *baud = get_sclk() / (16*(dll | dlh << 8)); - } - pr_debug("%s:baud = %d, parity = %c, bits= %d\n", __func__, *baud, *parity, *bits); -} - -static struct uart_driver bfin_serial_reg; - -static void bfin_serial_console_putchar(struct uart_port *port, int ch) -{ - struct bfin_serial_port *uart = (struct bfin_serial_port *)port; - while (!(UART_GET_LSR(uart) & THRE)) - barrier(); - UART_PUT_CHAR(uart, ch); -} - -#endif /* defined (CONFIG_SERIAL_BFIN_CONSOLE) || - defined (CONFIG_EARLY_PRINTK) */ - -#ifdef CONFIG_SERIAL_BFIN_CONSOLE -#define CLASS_BFIN_CONSOLE "bfin-console" -/* - * Interrupts are disabled on entering - */ -static void -bfin_serial_console_write(struct console *co, const char *s, unsigned int count) -{ - struct bfin_serial_port *uart = bfin_serial_ports[co->index]; - unsigned long flags; - - spin_lock_irqsave(&uart->port.lock, flags); - uart_console_write(&uart->port, s, count, bfin_serial_console_putchar); - spin_unlock_irqrestore(&uart->port.lock, flags); - -} - -static int __init -bfin_serial_console_setup(struct console *co, char *options) -{ - struct bfin_serial_port *uart; - int baud = 57600; - int bits = 8; - int parity = 'n'; -# if defined(CONFIG_SERIAL_BFIN_CTSRTS) || \ - defined(CONFIG_SERIAL_BFIN_HARD_CTSRTS) - int flow = 'r'; -# else - int flow = 'n'; -# endif - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - if (co->index < 0 || co->index >= BFIN_UART_NR_PORTS) - return -ENODEV; - - uart = bfin_serial_ports[co->index]; - if (!uart) - return -ENODEV; - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - else - bfin_serial_console_get_options(uart, &baud, &parity, &bits); - - return uart_set_options(&uart->port, co, baud, parity, bits, flow); -} - -static struct console bfin_serial_console = { - .name = BFIN_SERIAL_DEV_NAME, - .write = bfin_serial_console_write, - .device = uart_console_device, - .setup = bfin_serial_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &bfin_serial_reg, -}; -#define BFIN_SERIAL_CONSOLE &bfin_serial_console -#else -#define BFIN_SERIAL_CONSOLE NULL -#endif /* CONFIG_SERIAL_BFIN_CONSOLE */ - -#ifdef CONFIG_EARLY_PRINTK -static struct bfin_serial_port bfin_earlyprintk_port; -#define CLASS_BFIN_EARLYPRINTK "bfin-earlyprintk" - -/* - * Interrupts are disabled on entering - */ -static void -bfin_earlyprintk_console_write(struct console *co, const char *s, unsigned int count) -{ - unsigned long flags; - - if (bfin_earlyprintk_port.port.line != co->index) - return; - - spin_lock_irqsave(&bfin_earlyprintk_port.port.lock, flags); - uart_console_write(&bfin_earlyprintk_port.port, s, count, - bfin_serial_console_putchar); - spin_unlock_irqrestore(&bfin_earlyprintk_port.port.lock, flags); -} - -/* - * This should have a .setup or .early_setup in it, but then things get called - * without the command line options, and the baud rate gets messed up - so - * don't let the common infrastructure play with things. (see calls to setup - * & earlysetup in ./kernel/printk.c:register_console() - */ -static struct __initdata console bfin_early_serial_console = { - .name = "early_BFuart", - .write = bfin_earlyprintk_console_write, - .device = uart_console_device, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &bfin_serial_reg, -}; -#endif - -static struct uart_driver bfin_serial_reg = { - .owner = THIS_MODULE, - .driver_name = DRIVER_NAME, - .dev_name = BFIN_SERIAL_DEV_NAME, - .major = BFIN_SERIAL_MAJOR, - .minor = BFIN_SERIAL_MINOR, - .nr = BFIN_UART_NR_PORTS, - .cons = BFIN_SERIAL_CONSOLE, -}; - -static int bfin_serial_suspend(struct platform_device *pdev, pm_message_t state) -{ - struct bfin_serial_port *uart = platform_get_drvdata(pdev); - - return uart_suspend_port(&bfin_serial_reg, &uart->port); -} - -static int bfin_serial_resume(struct platform_device *pdev) -{ - struct bfin_serial_port *uart = platform_get_drvdata(pdev); - - return uart_resume_port(&bfin_serial_reg, &uart->port); -} - -static int bfin_serial_probe(struct platform_device *pdev) -{ - struct resource *res; - struct bfin_serial_port *uart = NULL; - int ret = 0; - - if (pdev->id < 0 || pdev->id >= BFIN_UART_NR_PORTS) { - dev_err(&pdev->dev, "Wrong bfin uart platform device id.\n"); - return -ENOENT; - } - - if (bfin_serial_ports[pdev->id] == NULL) { - - uart = kzalloc(sizeof(*uart), GFP_KERNEL); - if (!uart) { - dev_err(&pdev->dev, - "fail to malloc bfin_serial_port\n"); - return -ENOMEM; - } - bfin_serial_ports[pdev->id] = uart; - -#ifdef CONFIG_EARLY_PRINTK - if (!(bfin_earlyprintk_port.port.membase - && bfin_earlyprintk_port.port.line == pdev->id)) { - /* - * If the peripheral PINs of current port is allocated - * in earlyprintk probe stage, don't do it again. - */ -#endif - ret = peripheral_request_list( - (unsigned short *)pdev->dev.platform_data, DRIVER_NAME); - if (ret) { - dev_err(&pdev->dev, - "fail to request bfin serial peripherals\n"); - goto out_error_free_mem; - } -#ifdef CONFIG_EARLY_PRINTK - } -#endif - - spin_lock_init(&uart->port.lock); - uart->port.uartclk = get_sclk(); - uart->port.fifosize = BFIN_UART_TX_FIFO_SIZE; - uart->port.ops = &bfin_serial_pops; - uart->port.line = pdev->id; - uart->port.iotype = UPIO_MEM; - uart->port.flags = UPF_BOOT_AUTOCONF; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res == NULL) { - dev_err(&pdev->dev, "Cannot get IORESOURCE_MEM\n"); - ret = -ENOENT; - goto out_error_free_peripherals; - } - - uart->port.membase = ioremap(res->start, - res->end - res->start); - if (!uart->port.membase) { - dev_err(&pdev->dev, "Cannot map uart IO\n"); - ret = -ENXIO; - goto out_error_free_peripherals; - } - uart->port.mapbase = res->start; - - uart->port.irq = platform_get_irq(pdev, 0); - if (uart->port.irq < 0) { - dev_err(&pdev->dev, "No uart RX/TX IRQ specified\n"); - ret = -ENOENT; - goto out_error_unmap; - } - - uart->status_irq = platform_get_irq(pdev, 1); - if (uart->status_irq < 0) { - dev_err(&pdev->dev, "No uart status IRQ specified\n"); - ret = -ENOENT; - goto out_error_unmap; - } - -#ifdef CONFIG_SERIAL_BFIN_DMA - uart->tx_done = 1; - uart->tx_count = 0; - - res = platform_get_resource(pdev, IORESOURCE_DMA, 0); - if (res == NULL) { - dev_err(&pdev->dev, "No uart TX DMA channel specified\n"); - ret = -ENOENT; - goto out_error_unmap; - } - uart->tx_dma_channel = res->start; - - res = platform_get_resource(pdev, IORESOURCE_DMA, 1); - if (res == NULL) { - dev_err(&pdev->dev, "No uart RX DMA channel specified\n"); - ret = -ENOENT; - goto out_error_unmap; - } - uart->rx_dma_channel = res->start; - - init_timer(&(uart->rx_dma_timer)); -#endif - -#if defined(CONFIG_SERIAL_BFIN_CTSRTS) || \ - defined(CONFIG_SERIAL_BFIN_HARD_CTSRTS) - res = platform_get_resource(pdev, IORESOURCE_IO, 0); - if (res == NULL) - uart->cts_pin = -1; - else - uart->cts_pin = res->start; - - res = platform_get_resource(pdev, IORESOURCE_IO, 1); - if (res == NULL) - uart->rts_pin = -1; - else - uart->rts_pin = res->start; -# if defined(CONFIG_SERIAL_BFIN_CTSRTS) - if (uart->rts_pin >= 0) - gpio_request(uart->rts_pin, DRIVER_NAME); -# endif -#endif - } - -#ifdef CONFIG_SERIAL_BFIN_CONSOLE - if (!is_early_platform_device(pdev)) { -#endif - uart = bfin_serial_ports[pdev->id]; - uart->port.dev = &pdev->dev; - dev_set_drvdata(&pdev->dev, uart); - ret = uart_add_one_port(&bfin_serial_reg, &uart->port); -#ifdef CONFIG_SERIAL_BFIN_CONSOLE - } -#endif - - if (!ret) - return 0; - - if (uart) { -out_error_unmap: - iounmap(uart->port.membase); -out_error_free_peripherals: - peripheral_free_list( - (unsigned short *)pdev->dev.platform_data); -out_error_free_mem: - kfree(uart); - bfin_serial_ports[pdev->id] = NULL; - } - - return ret; -} - -static int __devexit bfin_serial_remove(struct platform_device *pdev) -{ - struct bfin_serial_port *uart = platform_get_drvdata(pdev); - - dev_set_drvdata(&pdev->dev, NULL); - - if (uart) { - uart_remove_one_port(&bfin_serial_reg, &uart->port); -#ifdef CONFIG_SERIAL_BFIN_CTSRTS - if (uart->rts_pin >= 0) - gpio_free(uart->rts_pin); -#endif - iounmap(uart->port.membase); - peripheral_free_list( - (unsigned short *)pdev->dev.platform_data); - kfree(uart); - bfin_serial_ports[pdev->id] = NULL; - } - - return 0; -} - -static struct platform_driver bfin_serial_driver = { - .probe = bfin_serial_probe, - .remove = __devexit_p(bfin_serial_remove), - .suspend = bfin_serial_suspend, - .resume = bfin_serial_resume, - .driver = { - .name = DRIVER_NAME, - .owner = THIS_MODULE, - }, -}; - -#if defined(CONFIG_SERIAL_BFIN_CONSOLE) -static __initdata struct early_platform_driver early_bfin_serial_driver = { - .class_str = CLASS_BFIN_CONSOLE, - .pdrv = &bfin_serial_driver, - .requested_id = EARLY_PLATFORM_ID_UNSET, -}; - -static int __init bfin_serial_rs_console_init(void) -{ - early_platform_driver_register(&early_bfin_serial_driver, DRIVER_NAME); - - early_platform_driver_probe(CLASS_BFIN_CONSOLE, BFIN_UART_NR_PORTS, 0); - - register_console(&bfin_serial_console); - - return 0; -} -console_initcall(bfin_serial_rs_console_init); -#endif - -#ifdef CONFIG_EARLY_PRINTK -/* - * Memory can't be allocated dynamically during earlyprink init stage. - * So, do individual probe for earlyprink with a static uart port variable. - */ -static int bfin_earlyprintk_probe(struct platform_device *pdev) -{ - struct resource *res; - int ret; - - if (pdev->id < 0 || pdev->id >= BFIN_UART_NR_PORTS) { - dev_err(&pdev->dev, "Wrong earlyprintk platform device id.\n"); - return -ENOENT; - } - - ret = peripheral_request_list( - (unsigned short *)pdev->dev.platform_data, DRIVER_NAME); - if (ret) { - dev_err(&pdev->dev, - "fail to request bfin serial peripherals\n"); - return ret; - } - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res == NULL) { - dev_err(&pdev->dev, "Cannot get IORESOURCE_MEM\n"); - ret = -ENOENT; - goto out_error_free_peripherals; - } - - bfin_earlyprintk_port.port.membase = ioremap(res->start, - res->end - res->start); - if (!bfin_earlyprintk_port.port.membase) { - dev_err(&pdev->dev, "Cannot map uart IO\n"); - ret = -ENXIO; - goto out_error_free_peripherals; - } - bfin_earlyprintk_port.port.mapbase = res->start; - bfin_earlyprintk_port.port.line = pdev->id; - bfin_earlyprintk_port.port.uartclk = get_sclk(); - bfin_earlyprintk_port.port.fifosize = BFIN_UART_TX_FIFO_SIZE; - spin_lock_init(&bfin_earlyprintk_port.port.lock); - - return 0; - -out_error_free_peripherals: - peripheral_free_list( - (unsigned short *)pdev->dev.platform_data); - - return ret; -} - -static struct platform_driver bfin_earlyprintk_driver = { - .probe = bfin_earlyprintk_probe, - .driver = { - .name = DRIVER_NAME, - .owner = THIS_MODULE, - }, -}; - -static __initdata struct early_platform_driver early_bfin_earlyprintk_driver = { - .class_str = CLASS_BFIN_EARLYPRINTK, - .pdrv = &bfin_earlyprintk_driver, - .requested_id = EARLY_PLATFORM_ID_UNSET, -}; - -struct console __init *bfin_earlyserial_init(unsigned int port, - unsigned int cflag) -{ - struct ktermios t; - char port_name[20]; - - if (port < 0 || port >= BFIN_UART_NR_PORTS) - return NULL; - - /* - * Only probe resource of the given port in earlyprintk boot arg. - * The expected port id should be indicated in port name string. - */ - snprintf(port_name, 20, DRIVER_NAME ".%d", port); - early_platform_driver_register(&early_bfin_earlyprintk_driver, - port_name); - early_platform_driver_probe(CLASS_BFIN_EARLYPRINTK, 1, 0); - - if (!bfin_earlyprintk_port.port.membase) - return NULL; - -#ifdef CONFIG_SERIAL_BFIN_CONSOLE - /* - * If we are using early serial, don't let the normal console rewind - * log buffer, since that causes things to be printed multiple times - */ - bfin_serial_console.flags &= ~CON_PRINTBUFFER; -#endif - - bfin_early_serial_console.index = port; - t.c_cflag = cflag; - t.c_iflag = 0; - t.c_oflag = 0; - t.c_lflag = ICANON; - t.c_line = port; - bfin_serial_set_termios(&bfin_earlyprintk_port.port, &t, &t); - - return &bfin_early_serial_console; -} -#endif /* CONFIG_EARLY_PRINTK */ - -static int __init bfin_serial_init(void) -{ - int ret; - - pr_info("Blackfin serial driver\n"); - - ret = uart_register_driver(&bfin_serial_reg); - if (ret) { - pr_err("failed to register %s:%d\n", - bfin_serial_reg.driver_name, ret); - } - - ret = platform_driver_register(&bfin_serial_driver); - if (ret) { - pr_err("fail to register bfin uart\n"); - uart_unregister_driver(&bfin_serial_reg); - } - - return ret; -} - -static void __exit bfin_serial_exit(void) -{ - platform_driver_unregister(&bfin_serial_driver); - uart_unregister_driver(&bfin_serial_reg); -} - - -module_init(bfin_serial_init); -module_exit(bfin_serial_exit); - -MODULE_AUTHOR("Sonic Zhang, Aubrey Li"); -MODULE_DESCRIPTION("Blackfin generic serial port driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_CHARDEV_MAJOR(BFIN_SERIAL_MAJOR); -MODULE_ALIAS("platform:bfin-uart"); diff --git a/drivers/serial/bfin_sport_uart.c b/drivers/serial/bfin_sport_uart.c deleted file mode 100644 index e95c524d9d18..000000000000 --- a/drivers/serial/bfin_sport_uart.c +++ /dev/null @@ -1,935 +0,0 @@ -/* - * Blackfin On-Chip Sport Emulated UART Driver - * - * Copyright 2006-2009 Analog Devices Inc. - * - * Enter bugs at http://blackfin.uclinux.org/ - * - * Licensed under the GPL-2 or later. - */ - -/* - * This driver and the hardware supported are in term of EE-191 of ADI. - * http://www.analog.com/static/imported-files/application_notes/EE191.pdf - * This application note describe how to implement a UART on a Sharc DSP, - * but this driver is implemented on Blackfin Processor. - * Transmit Frame Sync is not used by this driver to transfer data out. - */ - -/* #define DEBUG */ - -#define DRV_NAME "bfin-sport-uart" -#define DEVICE_NAME "ttySS" -#define pr_fmt(fmt) DRV_NAME ": " fmt - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/io.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/slab.h> -#include <linux/platform_device.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> - -#include <asm/bfin_sport.h> -#include <asm/delay.h> -#include <asm/portmux.h> - -#include "bfin_sport_uart.h" - -struct sport_uart_port { - struct uart_port port; - int err_irq; - unsigned short csize; - unsigned short rxmask; - unsigned short txmask1; - unsigned short txmask2; - unsigned char stopb; -/* unsigned char parib; */ -#ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS - int cts_pin; - int rts_pin; -#endif -}; - -static int sport_uart_tx_chars(struct sport_uart_port *up); -static void sport_stop_tx(struct uart_port *port); - -static inline void tx_one_byte(struct sport_uart_port *up, unsigned int value) -{ - pr_debug("%s value:%x, mask1=0x%x, mask2=0x%x\n", __func__, value, - up->txmask1, up->txmask2); - - /* Place Start and Stop bits */ - __asm__ __volatile__ ( - "%[val] <<= 1;" - "%[val] = %[val] & %[mask1];" - "%[val] = %[val] | %[mask2];" - : [val]"+d"(value) - : [mask1]"d"(up->txmask1), [mask2]"d"(up->txmask2) - : "ASTAT" - ); - pr_debug("%s value:%x\n", __func__, value); - - SPORT_PUT_TX(up, value); -} - -static inline unsigned char rx_one_byte(struct sport_uart_port *up) -{ - unsigned int value; - unsigned char extract; - u32 tmp_mask1, tmp_mask2, tmp_shift, tmp; - - if ((up->csize + up->stopb) > 7) - value = SPORT_GET_RX32(up); - else - value = SPORT_GET_RX(up); - - pr_debug("%s value:%x, cs=%d, mask=0x%x\n", __func__, value, - up->csize, up->rxmask); - - /* Extract data */ - __asm__ __volatile__ ( - "%[extr] = 0;" - "%[mask1] = %[rxmask];" - "%[mask2] = 0x0200(Z);" - "%[shift] = 0;" - "LSETUP(.Lloop_s, .Lloop_e) LC0 = %[lc];" - ".Lloop_s:" - "%[tmp] = extract(%[val], %[mask1].L)(Z);" - "%[tmp] <<= %[shift];" - "%[extr] = %[extr] | %[tmp];" - "%[mask1] = %[mask1] - %[mask2];" - ".Lloop_e:" - "%[shift] += 1;" - : [extr]"=&d"(extract), [shift]"=&d"(tmp_shift), [tmp]"=&d"(tmp), - [mask1]"=&d"(tmp_mask1), [mask2]"=&d"(tmp_mask2) - : [val]"d"(value), [rxmask]"d"(up->rxmask), [lc]"a"(up->csize) - : "ASTAT", "LB0", "LC0", "LT0" - ); - - pr_debug(" extract:%x\n", extract); - return extract; -} - -static int sport_uart_setup(struct sport_uart_port *up, int size, int baud_rate) -{ - int tclkdiv, rclkdiv; - unsigned int sclk = get_sclk(); - - /* Set TCR1 and TCR2, TFSR is not enabled for uart */ - SPORT_PUT_TCR1(up, (LATFS | ITFS | TFSR | TLSBIT | ITCLK)); - SPORT_PUT_TCR2(up, size + 1); - pr_debug("%s TCR1:%x, TCR2:%x\n", __func__, SPORT_GET_TCR1(up), SPORT_GET_TCR2(up)); - - /* Set RCR1 and RCR2 */ - SPORT_PUT_RCR1(up, (RCKFE | LARFS | LRFS | RFSR | IRCLK)); - SPORT_PUT_RCR2(up, (size + 1) * 2 - 1); - pr_debug("%s RCR1:%x, RCR2:%x\n", __func__, SPORT_GET_RCR1(up), SPORT_GET_RCR2(up)); - - tclkdiv = sclk / (2 * baud_rate) - 1; - /* The actual uart baud rate of devices vary between +/-2%. The sport - * RX sample rate should be faster than the double of the worst case, - * otherwise, wrong data are received. So, set sport RX clock to be - * 3% faster. - */ - rclkdiv = sclk / (2 * baud_rate * 2 * 97 / 100) - 1; - SPORT_PUT_TCLKDIV(up, tclkdiv); - SPORT_PUT_RCLKDIV(up, rclkdiv); - SSYNC(); - pr_debug("%s sclk:%d, baud_rate:%d, tclkdiv:%d, rclkdiv:%d\n", - __func__, sclk, baud_rate, tclkdiv, rclkdiv); - - return 0; -} - -static irqreturn_t sport_uart_rx_irq(int irq, void *dev_id) -{ - struct sport_uart_port *up = dev_id; - struct tty_struct *tty = up->port.state->port.tty; - unsigned int ch; - - spin_lock(&up->port.lock); - - while (SPORT_GET_STAT(up) & RXNE) { - ch = rx_one_byte(up); - up->port.icount.rx++; - - if (!uart_handle_sysrq_char(&up->port, ch)) - tty_insert_flip_char(tty, ch, TTY_NORMAL); - } - tty_flip_buffer_push(tty); - - spin_unlock(&up->port.lock); - - return IRQ_HANDLED; -} - -static irqreturn_t sport_uart_tx_irq(int irq, void *dev_id) -{ - struct sport_uart_port *up = dev_id; - - spin_lock(&up->port.lock); - sport_uart_tx_chars(up); - spin_unlock(&up->port.lock); - - return IRQ_HANDLED; -} - -static irqreturn_t sport_uart_err_irq(int irq, void *dev_id) -{ - struct sport_uart_port *up = dev_id; - struct tty_struct *tty = up->port.state->port.tty; - unsigned int stat = SPORT_GET_STAT(up); - - spin_lock(&up->port.lock); - - /* Overflow in RX FIFO */ - if (stat & ROVF) { - up->port.icount.overrun++; - tty_insert_flip_char(tty, 0, TTY_OVERRUN); - SPORT_PUT_STAT(up, ROVF); /* Clear ROVF bit */ - } - /* These should not happen */ - if (stat & (TOVF | TUVF | RUVF)) { - pr_err("SPORT Error:%s %s %s\n", - (stat & TOVF) ? "TX overflow" : "", - (stat & TUVF) ? "TX underflow" : "", - (stat & RUVF) ? "RX underflow" : ""); - SPORT_PUT_TCR1(up, SPORT_GET_TCR1(up) & ~TSPEN); - SPORT_PUT_RCR1(up, SPORT_GET_RCR1(up) & ~RSPEN); - } - SSYNC(); - - spin_unlock(&up->port.lock); - return IRQ_HANDLED; -} - -#ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS -static unsigned int sport_get_mctrl(struct uart_port *port) -{ - struct sport_uart_port *up = (struct sport_uart_port *)port; - if (up->cts_pin < 0) - return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; - - /* CTS PIN is negative assertive. */ - if (SPORT_UART_GET_CTS(up)) - return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; - else - return TIOCM_DSR | TIOCM_CAR; -} - -static void sport_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct sport_uart_port *up = (struct sport_uart_port *)port; - if (up->rts_pin < 0) - return; - - /* RTS PIN is negative assertive. */ - if (mctrl & TIOCM_RTS) - SPORT_UART_ENABLE_RTS(up); - else - SPORT_UART_DISABLE_RTS(up); -} - -/* - * Handle any change of modem status signal. - */ -static irqreturn_t sport_mctrl_cts_int(int irq, void *dev_id) -{ - struct sport_uart_port *up = (struct sport_uart_port *)dev_id; - unsigned int status; - - status = sport_get_mctrl(&up->port); - uart_handle_cts_change(&up->port, status & TIOCM_CTS); - - return IRQ_HANDLED; -} -#else -static unsigned int sport_get_mctrl(struct uart_port *port) -{ - pr_debug("%s enter\n", __func__); - return TIOCM_CTS | TIOCM_CD | TIOCM_DSR; -} - -static void sport_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - pr_debug("%s enter\n", __func__); -} -#endif - -/* Reqeust IRQ, Setup clock */ -static int sport_startup(struct uart_port *port) -{ - struct sport_uart_port *up = (struct sport_uart_port *)port; - int ret; - - pr_debug("%s enter\n", __func__); - ret = request_irq(up->port.irq, sport_uart_rx_irq, 0, - "SPORT_UART_RX", up); - if (ret) { - dev_err(port->dev, "unable to request SPORT RX interrupt\n"); - return ret; - } - - ret = request_irq(up->port.irq+1, sport_uart_tx_irq, 0, - "SPORT_UART_TX", up); - if (ret) { - dev_err(port->dev, "unable to request SPORT TX interrupt\n"); - goto fail1; - } - - ret = request_irq(up->err_irq, sport_uart_err_irq, 0, - "SPORT_UART_STATUS", up); - if (ret) { - dev_err(port->dev, "unable to request SPORT status interrupt\n"); - goto fail2; - } - -#ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS - if (up->cts_pin >= 0) { - if (request_irq(gpio_to_irq(up->cts_pin), - sport_mctrl_cts_int, - IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | - IRQF_DISABLED, "BFIN_SPORT_UART_CTS", up)) { - up->cts_pin = -1; - dev_info(port->dev, "Unable to attach BlackFin UART \ - over SPORT CTS interrupt. So, disable it.\n"); - } - } - if (up->rts_pin >= 0) - gpio_direction_output(up->rts_pin, 0); -#endif - - return 0; - fail2: - free_irq(up->port.irq+1, up); - fail1: - free_irq(up->port.irq, up); - - return ret; -} - -/* - * sport_uart_tx_chars - * - * ret 1 means need to enable sport. - * ret 0 means do nothing. - */ -static int sport_uart_tx_chars(struct sport_uart_port *up) -{ - struct circ_buf *xmit = &up->port.state->xmit; - - if (SPORT_GET_STAT(up) & TXF) - return 0; - - if (up->port.x_char) { - tx_one_byte(up, up->port.x_char); - up->port.icount.tx++; - up->port.x_char = 0; - return 1; - } - - if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) { - /* The waiting loop to stop SPORT TX from TX interrupt is - * too long. This may block SPORT RX interrupts and cause - * RX FIFO overflow. So, do stop sport TX only after the last - * char in TX FIFO is moved into the shift register. - */ - if (SPORT_GET_STAT(up) & TXHRE) - sport_stop_tx(&up->port); - return 0; - } - - while(!(SPORT_GET_STAT(up) & TXF) && !uart_circ_empty(xmit)) { - tx_one_byte(up, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE -1); - up->port.icount.tx++; - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&up->port); - - return 1; -} - -static unsigned int sport_tx_empty(struct uart_port *port) -{ - struct sport_uart_port *up = (struct sport_uart_port *)port; - unsigned int stat; - - stat = SPORT_GET_STAT(up); - pr_debug("%s stat:%04x\n", __func__, stat); - if (stat & TXHRE) { - return TIOCSER_TEMT; - } else - return 0; -} - -static void sport_stop_tx(struct uart_port *port) -{ - struct sport_uart_port *up = (struct sport_uart_port *)port; - - pr_debug("%s enter\n", __func__); - - if (!(SPORT_GET_TCR1(up) & TSPEN)) - return; - - /* Although the hold register is empty, last byte is still in shift - * register and not sent out yet. So, put a dummy data into TX FIFO. - * Then, sport tx stops when last byte is shift out and the dummy - * data is moved into the shift register. - */ - SPORT_PUT_TX(up, 0xffff); - while (!(SPORT_GET_STAT(up) & TXHRE)) - cpu_relax(); - - SPORT_PUT_TCR1(up, (SPORT_GET_TCR1(up) & ~TSPEN)); - SSYNC(); - - return; -} - -static void sport_start_tx(struct uart_port *port) -{ - struct sport_uart_port *up = (struct sport_uart_port *)port; - - pr_debug("%s enter\n", __func__); - - /* Write data into SPORT FIFO before enable SPROT to transmit */ - if (sport_uart_tx_chars(up)) { - /* Enable transmit, then an interrupt will generated */ - SPORT_PUT_TCR1(up, (SPORT_GET_TCR1(up) | TSPEN)); - SSYNC(); - } - - pr_debug("%s exit\n", __func__); -} - -static void sport_stop_rx(struct uart_port *port) -{ - struct sport_uart_port *up = (struct sport_uart_port *)port; - - pr_debug("%s enter\n", __func__); - /* Disable sport to stop rx */ - SPORT_PUT_RCR1(up, (SPORT_GET_RCR1(up) & ~RSPEN)); - SSYNC(); -} - -static void sport_enable_ms(struct uart_port *port) -{ - pr_debug("%s enter\n", __func__); -} - -static void sport_break_ctl(struct uart_port *port, int break_state) -{ - pr_debug("%s enter\n", __func__); -} - -static void sport_shutdown(struct uart_port *port) -{ - struct sport_uart_port *up = (struct sport_uart_port *)port; - - dev_dbg(port->dev, "%s enter\n", __func__); - - /* Disable sport */ - SPORT_PUT_TCR1(up, (SPORT_GET_TCR1(up) & ~TSPEN)); - SPORT_PUT_RCR1(up, (SPORT_GET_RCR1(up) & ~RSPEN)); - SSYNC(); - - free_irq(up->port.irq, up); - free_irq(up->port.irq+1, up); - free_irq(up->err_irq, up); -#ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS - if (up->cts_pin >= 0) - free_irq(gpio_to_irq(up->cts_pin), up); -#endif -} - -static const char *sport_type(struct uart_port *port) -{ - struct sport_uart_port *up = (struct sport_uart_port *)port; - - pr_debug("%s enter\n", __func__); - return up->port.type == PORT_BFIN_SPORT ? "BFIN-SPORT-UART" : NULL; -} - -static void sport_release_port(struct uart_port *port) -{ - pr_debug("%s enter\n", __func__); -} - -static int sport_request_port(struct uart_port *port) -{ - pr_debug("%s enter\n", __func__); - return 0; -} - -static void sport_config_port(struct uart_port *port, int flags) -{ - struct sport_uart_port *up = (struct sport_uart_port *)port; - - pr_debug("%s enter\n", __func__); - up->port.type = PORT_BFIN_SPORT; -} - -static int sport_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - pr_debug("%s enter\n", __func__); - return 0; -} - -static void sport_set_termios(struct uart_port *port, - struct ktermios *termios, struct ktermios *old) -{ - struct sport_uart_port *up = (struct sport_uart_port *)port; - unsigned long flags; - int i; - - pr_debug("%s enter, c_cflag:%08x\n", __func__, termios->c_cflag); - - switch (termios->c_cflag & CSIZE) { - case CS8: - up->csize = 8; - break; - case CS7: - up->csize = 7; - break; - case CS6: - up->csize = 6; - break; - case CS5: - up->csize = 5; - break; - default: - pr_warning("requested word length not supported\n"); - } - - if (termios->c_cflag & CSTOPB) { - up->stopb = 1; - } - if (termios->c_cflag & PARENB) { - pr_warning("PAREN bits is not supported yet\n"); - /* up->parib = 1; */ - } - - spin_lock_irqsave(&up->port.lock, flags); - - port->read_status_mask = 0; - - /* - * Characters to ignore - */ - port->ignore_status_mask = 0; - - /* RX extract mask */ - up->rxmask = 0x01 | (((up->csize + up->stopb) * 2 - 1) << 0x8); - /* TX masks, 8 bit data and 1 bit stop for example: - * mask1 = b#0111111110 - * mask2 = b#1000000000 - */ - for (i = 0, up->txmask1 = 0; i < up->csize; i++) - up->txmask1 |= (1<<i); - up->txmask2 = (1<<i); - if (up->stopb) { - ++i; - up->txmask2 |= (1<<i); - } - up->txmask1 <<= 1; - up->txmask2 <<= 1; - /* uart baud rate */ - port->uartclk = uart_get_baud_rate(port, termios, old, 0, get_sclk()/16); - - /* Disable UART */ - SPORT_PUT_TCR1(up, SPORT_GET_TCR1(up) & ~TSPEN); - SPORT_PUT_RCR1(up, SPORT_GET_RCR1(up) & ~RSPEN); - - sport_uart_setup(up, up->csize + up->stopb, port->uartclk); - - /* driver TX line high after config, one dummy data is - * necessary to stop sport after shift one byte - */ - SPORT_PUT_TX(up, 0xffff); - SPORT_PUT_TX(up, 0xffff); - SPORT_PUT_TCR1(up, (SPORT_GET_TCR1(up) | TSPEN)); - SSYNC(); - while (!(SPORT_GET_STAT(up) & TXHRE)) - cpu_relax(); - SPORT_PUT_TCR1(up, SPORT_GET_TCR1(up) & ~TSPEN); - SSYNC(); - - /* Port speed changed, update the per-port timeout. */ - uart_update_timeout(port, termios->c_cflag, port->uartclk); - - /* Enable sport rx */ - SPORT_PUT_RCR1(up, SPORT_GET_RCR1(up) | RSPEN); - SSYNC(); - - spin_unlock_irqrestore(&up->port.lock, flags); -} - -struct uart_ops sport_uart_ops = { - .tx_empty = sport_tx_empty, - .set_mctrl = sport_set_mctrl, - .get_mctrl = sport_get_mctrl, - .stop_tx = sport_stop_tx, - .start_tx = sport_start_tx, - .stop_rx = sport_stop_rx, - .enable_ms = sport_enable_ms, - .break_ctl = sport_break_ctl, - .startup = sport_startup, - .shutdown = sport_shutdown, - .set_termios = sport_set_termios, - .type = sport_type, - .release_port = sport_release_port, - .request_port = sport_request_port, - .config_port = sport_config_port, - .verify_port = sport_verify_port, -}; - -#define BFIN_SPORT_UART_MAX_PORTS 4 - -static struct sport_uart_port *bfin_sport_uart_ports[BFIN_SPORT_UART_MAX_PORTS]; - -#ifdef CONFIG_SERIAL_BFIN_SPORT_CONSOLE -#define CLASS_BFIN_SPORT_CONSOLE "bfin-sport-console" - -static int __init -sport_uart_console_setup(struct console *co, char *options) -{ - struct sport_uart_port *up; - int baud = 57600; - int bits = 8; - int parity = 'n'; -# ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS - int flow = 'r'; -# else - int flow = 'n'; -# endif - - /* Check whether an invalid uart number has been specified */ - if (co->index < 0 || co->index >= BFIN_SPORT_UART_MAX_PORTS) - return -ENODEV; - - up = bfin_sport_uart_ports[co->index]; - if (!up) - return -ENODEV; - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(&up->port, co, baud, parity, bits, flow); -} - -static void sport_uart_console_putchar(struct uart_port *port, int ch) -{ - struct sport_uart_port *up = (struct sport_uart_port *)port; - - while (SPORT_GET_STAT(up) & TXF) - barrier(); - - tx_one_byte(up, ch); -} - -/* - * Interrupts are disabled on entering - */ -static void -sport_uart_console_write(struct console *co, const char *s, unsigned int count) -{ - struct sport_uart_port *up = bfin_sport_uart_ports[co->index]; - unsigned long flags; - - spin_lock_irqsave(&up->port.lock, flags); - - if (SPORT_GET_TCR1(up) & TSPEN) - uart_console_write(&up->port, s, count, sport_uart_console_putchar); - else { - /* dummy data to start sport */ - while (SPORT_GET_STAT(up) & TXF) - barrier(); - SPORT_PUT_TX(up, 0xffff); - /* Enable transmit, then an interrupt will generated */ - SPORT_PUT_TCR1(up, (SPORT_GET_TCR1(up) | TSPEN)); - SSYNC(); - - uart_console_write(&up->port, s, count, sport_uart_console_putchar); - - /* Although the hold register is empty, last byte is still in shift - * register and not sent out yet. So, put a dummy data into TX FIFO. - * Then, sport tx stops when last byte is shift out and the dummy - * data is moved into the shift register. - */ - while (SPORT_GET_STAT(up) & TXF) - barrier(); - SPORT_PUT_TX(up, 0xffff); - while (!(SPORT_GET_STAT(up) & TXHRE)) - barrier(); - - /* Stop sport tx transfer */ - SPORT_PUT_TCR1(up, (SPORT_GET_TCR1(up) & ~TSPEN)); - SSYNC(); - } - - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static struct uart_driver sport_uart_reg; - -static struct console sport_uart_console = { - .name = DEVICE_NAME, - .write = sport_uart_console_write, - .device = uart_console_device, - .setup = sport_uart_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &sport_uart_reg, -}; - -#define SPORT_UART_CONSOLE (&sport_uart_console) -#else -#define SPORT_UART_CONSOLE NULL -#endif /* CONFIG_SERIAL_BFIN_SPORT_CONSOLE */ - - -static struct uart_driver sport_uart_reg = { - .owner = THIS_MODULE, - .driver_name = DRV_NAME, - .dev_name = DEVICE_NAME, - .major = 204, - .minor = 84, - .nr = BFIN_SPORT_UART_MAX_PORTS, - .cons = SPORT_UART_CONSOLE, -}; - -#ifdef CONFIG_PM -static int sport_uart_suspend(struct device *dev) -{ - struct sport_uart_port *sport = dev_get_drvdata(dev); - - dev_dbg(dev, "%s enter\n", __func__); - if (sport) - uart_suspend_port(&sport_uart_reg, &sport->port); - - return 0; -} - -static int sport_uart_resume(struct device *dev) -{ - struct sport_uart_port *sport = dev_get_drvdata(dev); - - dev_dbg(dev, "%s enter\n", __func__); - if (sport) - uart_resume_port(&sport_uart_reg, &sport->port); - - return 0; -} - -static struct dev_pm_ops bfin_sport_uart_dev_pm_ops = { - .suspend = sport_uart_suspend, - .resume = sport_uart_resume, -}; -#endif - -static int __devinit sport_uart_probe(struct platform_device *pdev) -{ - struct resource *res; - struct sport_uart_port *sport; - int ret = 0; - - dev_dbg(&pdev->dev, "%s enter\n", __func__); - - if (pdev->id < 0 || pdev->id >= BFIN_SPORT_UART_MAX_PORTS) { - dev_err(&pdev->dev, "Wrong sport uart platform device id.\n"); - return -ENOENT; - } - - if (bfin_sport_uart_ports[pdev->id] == NULL) { - bfin_sport_uart_ports[pdev->id] = - kzalloc(sizeof(struct sport_uart_port), GFP_KERNEL); - sport = bfin_sport_uart_ports[pdev->id]; - if (!sport) { - dev_err(&pdev->dev, - "Fail to malloc sport_uart_port\n"); - return -ENOMEM; - } - - ret = peripheral_request_list( - (unsigned short *)pdev->dev.platform_data, DRV_NAME); - if (ret) { - dev_err(&pdev->dev, - "Fail to request SPORT peripherals\n"); - goto out_error_free_mem; - } - - spin_lock_init(&sport->port.lock); - sport->port.fifosize = SPORT_TX_FIFO_SIZE, - sport->port.ops = &sport_uart_ops; - sport->port.line = pdev->id; - sport->port.iotype = UPIO_MEM; - sport->port.flags = UPF_BOOT_AUTOCONF; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res == NULL) { - dev_err(&pdev->dev, "Cannot get IORESOURCE_MEM\n"); - ret = -ENOENT; - goto out_error_free_peripherals; - } - - sport->port.membase = ioremap(res->start, resource_size(res)); - if (!sport->port.membase) { - dev_err(&pdev->dev, "Cannot map sport IO\n"); - ret = -ENXIO; - goto out_error_free_peripherals; - } - sport->port.mapbase = res->start; - - sport->port.irq = platform_get_irq(pdev, 0); - if (sport->port.irq < 0) { - dev_err(&pdev->dev, "No sport RX/TX IRQ specified\n"); - ret = -ENOENT; - goto out_error_unmap; - } - - sport->err_irq = platform_get_irq(pdev, 1); - if (sport->err_irq < 0) { - dev_err(&pdev->dev, "No sport status IRQ specified\n"); - ret = -ENOENT; - goto out_error_unmap; - } -#ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS - res = platform_get_resource(pdev, IORESOURCE_IO, 0); - if (res == NULL) - sport->cts_pin = -1; - else - sport->cts_pin = res->start; - - res = platform_get_resource(pdev, IORESOURCE_IO, 1); - if (res == NULL) - sport->rts_pin = -1; - else - sport->rts_pin = res->start; - - if (sport->rts_pin >= 0) - gpio_request(sport->rts_pin, DRV_NAME); -#endif - } - -#ifdef CONFIG_SERIAL_BFIN_SPORT_CONSOLE - if (!is_early_platform_device(pdev)) { -#endif - sport = bfin_sport_uart_ports[pdev->id]; - sport->port.dev = &pdev->dev; - dev_set_drvdata(&pdev->dev, sport); - ret = uart_add_one_port(&sport_uart_reg, &sport->port); -#ifdef CONFIG_SERIAL_BFIN_SPORT_CONSOLE - } -#endif - if (!ret) - return 0; - - if (sport) { -out_error_unmap: - iounmap(sport->port.membase); -out_error_free_peripherals: - peripheral_free_list( - (unsigned short *)pdev->dev.platform_data); -out_error_free_mem: - kfree(sport); - bfin_sport_uart_ports[pdev->id] = NULL; - } - - return ret; -} - -static int __devexit sport_uart_remove(struct platform_device *pdev) -{ - struct sport_uart_port *sport = platform_get_drvdata(pdev); - - dev_dbg(&pdev->dev, "%s enter\n", __func__); - dev_set_drvdata(&pdev->dev, NULL); - - if (sport) { - uart_remove_one_port(&sport_uart_reg, &sport->port); -#ifdef CONFIG_SERIAL_BFIN_CTSRTS - if (sport->rts_pin >= 0) - gpio_free(sport->rts_pin); -#endif - iounmap(sport->port.membase); - peripheral_free_list( - (unsigned short *)pdev->dev.platform_data); - kfree(sport); - bfin_sport_uart_ports[pdev->id] = NULL; - } - - return 0; -} - -static struct platform_driver sport_uart_driver = { - .probe = sport_uart_probe, - .remove = __devexit_p(sport_uart_remove), - .driver = { - .name = DRV_NAME, -#ifdef CONFIG_PM - .pm = &bfin_sport_uart_dev_pm_ops, -#endif - }, -}; - -#ifdef CONFIG_SERIAL_BFIN_SPORT_CONSOLE -static __initdata struct early_platform_driver early_sport_uart_driver = { - .class_str = CLASS_BFIN_SPORT_CONSOLE, - .pdrv = &sport_uart_driver, - .requested_id = EARLY_PLATFORM_ID_UNSET, -}; - -static int __init sport_uart_rs_console_init(void) -{ - early_platform_driver_register(&early_sport_uart_driver, DRV_NAME); - - early_platform_driver_probe(CLASS_BFIN_SPORT_CONSOLE, - BFIN_SPORT_UART_MAX_PORTS, 0); - - register_console(&sport_uart_console); - - return 0; -} -console_initcall(sport_uart_rs_console_init); -#endif - -static int __init sport_uart_init(void) -{ - int ret; - - pr_info("Blackfin uart over sport driver\n"); - - ret = uart_register_driver(&sport_uart_reg); - if (ret) { - pr_err("failed to register %s:%d\n", - sport_uart_reg.driver_name, ret); - return ret; - } - - ret = platform_driver_register(&sport_uart_driver); - if (ret) { - pr_err("failed to register sport uart driver:%d\n", ret); - uart_unregister_driver(&sport_uart_reg); - } - - return ret; -} -module_init(sport_uart_init); - -static void __exit sport_uart_exit(void) -{ - platform_driver_unregister(&sport_uart_driver); - uart_unregister_driver(&sport_uart_reg); -} -module_exit(sport_uart_exit); - -MODULE_AUTHOR("Sonic Zhang, Roy Huang"); -MODULE_DESCRIPTION("Blackfin serial over SPORT driver"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/bfin_sport_uart.h b/drivers/serial/bfin_sport_uart.h deleted file mode 100644 index 6d06ce1d5675..000000000000 --- a/drivers/serial/bfin_sport_uart.h +++ /dev/null @@ -1,86 +0,0 @@ -/* - * Blackfin On-Chip Sport Emulated UART Driver - * - * Copyright 2006-2008 Analog Devices Inc. - * - * Enter bugs at http://blackfin.uclinux.org/ - * - * Licensed under the GPL-2 or later. - */ - -/* - * This driver and the hardware supported are in term of EE-191 of ADI. - * http://www.analog.com/static/imported-files/application_notes/EE191.pdf - * This application note describe how to implement a UART on a Sharc DSP, - * but this driver is implemented on Blackfin Processor. - * Transmit Frame Sync is not used by this driver to transfer data out. - */ - -#ifndef _BFIN_SPORT_UART_H -#define _BFIN_SPORT_UART_H - -#define OFFSET_TCR1 0x00 /* Transmit Configuration 1 Register */ -#define OFFSET_TCR2 0x04 /* Transmit Configuration 2 Register */ -#define OFFSET_TCLKDIV 0x08 /* Transmit Serial Clock Divider Register */ -#define OFFSET_TFSDIV 0x0C /* Transmit Frame Sync Divider Register */ -#define OFFSET_TX 0x10 /* Transmit Data Register */ -#define OFFSET_RX 0x18 /* Receive Data Register */ -#define OFFSET_RCR1 0x20 /* Receive Configuration 1 Register */ -#define OFFSET_RCR2 0x24 /* Receive Configuration 2 Register */ -#define OFFSET_RCLKDIV 0x28 /* Receive Serial Clock Divider Register */ -#define OFFSET_RFSDIV 0x2c /* Receive Frame Sync Divider Register */ -#define OFFSET_STAT 0x30 /* Status Register */ - -#define SPORT_GET_TCR1(sport) bfin_read16(((sport)->port.membase + OFFSET_TCR1)) -#define SPORT_GET_TCR2(sport) bfin_read16(((sport)->port.membase + OFFSET_TCR2)) -#define SPORT_GET_TCLKDIV(sport) bfin_read16(((sport)->port.membase + OFFSET_TCLKDIV)) -#define SPORT_GET_TFSDIV(sport) bfin_read16(((sport)->port.membase + OFFSET_TFSDIV)) -#define SPORT_GET_TX(sport) bfin_read16(((sport)->port.membase + OFFSET_TX)) -#define SPORT_GET_RX(sport) bfin_read16(((sport)->port.membase + OFFSET_RX)) -/* - * If another interrupt fires while doing a 32-bit read from RX FIFO, - * a fake RX underflow error will be generated. So disable interrupts - * to prevent interruption while reading the FIFO. - */ -#define SPORT_GET_RX32(sport) \ -({ \ - unsigned int __ret; \ - if (ANOMALY_05000473) \ - local_irq_disable(); \ - __ret = bfin_read32((sport)->port.membase + OFFSET_RX); \ - if (ANOMALY_05000473) \ - local_irq_enable(); \ - __ret; \ -}) -#define SPORT_GET_RCR1(sport) bfin_read16(((sport)->port.membase + OFFSET_RCR1)) -#define SPORT_GET_RCR2(sport) bfin_read16(((sport)->port.membase + OFFSET_RCR2)) -#define SPORT_GET_RCLKDIV(sport) bfin_read16(((sport)->port.membase + OFFSET_RCLKDIV)) -#define SPORT_GET_RFSDIV(sport) bfin_read16(((sport)->port.membase + OFFSET_RFSDIV)) -#define SPORT_GET_STAT(sport) bfin_read16(((sport)->port.membase + OFFSET_STAT)) - -#define SPORT_PUT_TCR1(sport, v) bfin_write16(((sport)->port.membase + OFFSET_TCR1), v) -#define SPORT_PUT_TCR2(sport, v) bfin_write16(((sport)->port.membase + OFFSET_TCR2), v) -#define SPORT_PUT_TCLKDIV(sport, v) bfin_write16(((sport)->port.membase + OFFSET_TCLKDIV), v) -#define SPORT_PUT_TFSDIV(sport, v) bfin_write16(((sport)->port.membase + OFFSET_TFSDIV), v) -#define SPORT_PUT_TX(sport, v) bfin_write16(((sport)->port.membase + OFFSET_TX), v) -#define SPORT_PUT_RX(sport, v) bfin_write16(((sport)->port.membase + OFFSET_RX), v) -#define SPORT_PUT_RCR1(sport, v) bfin_write16(((sport)->port.membase + OFFSET_RCR1), v) -#define SPORT_PUT_RCR2(sport, v) bfin_write16(((sport)->port.membase + OFFSET_RCR2), v) -#define SPORT_PUT_RCLKDIV(sport, v) bfin_write16(((sport)->port.membase + OFFSET_RCLKDIV), v) -#define SPORT_PUT_RFSDIV(sport, v) bfin_write16(((sport)->port.membase + OFFSET_RFSDIV), v) -#define SPORT_PUT_STAT(sport, v) bfin_write16(((sport)->port.membase + OFFSET_STAT), v) - -#define SPORT_TX_FIFO_SIZE 8 - -#define SPORT_UART_GET_CTS(x) gpio_get_value(x->cts_pin) -#define SPORT_UART_DISABLE_RTS(x) gpio_set_value(x->rts_pin, 1) -#define SPORT_UART_ENABLE_RTS(x) gpio_set_value(x->rts_pin, 0) - -#if defined(CONFIG_SERIAL_BFIN_SPORT0_UART_CTSRTS) \ - || defined(CONFIG_SERIAL_BFIN_SPORT1_UART_CTSRTS) \ - || defined(CONFIG_SERIAL_BFIN_SPORT2_UART_CTSRTS) \ - || defined(CONFIG_SERIAL_BFIN_SPORT3_UART_CTSRTS) -# define CONFIG_SERIAL_BFIN_SPORT_CTSRTS -#endif - -#endif /* _BFIN_SPORT_UART_H */ diff --git a/drivers/serial/clps711x.c b/drivers/serial/clps711x.c deleted file mode 100644 index b6acd19b458e..000000000000 --- a/drivers/serial/clps711x.c +++ /dev/null @@ -1,579 +0,0 @@ -/* - * linux/drivers/char/clps711x.c - * - * Driver for CLPS711x serial ports - * - * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. - * - * Copyright 1999 ARM Limited - * Copyright (C) 2000 Deep Blue Solutions Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#if defined(CONFIG_SERIAL_CLPS711X_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/spinlock.h> -#include <linux/device.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/serial.h> -#include <linux/io.h> - -#include <mach/hardware.h> -#include <asm/irq.h> -#include <asm/hardware/clps7111.h> - -#define UART_NR 2 - -#define SERIAL_CLPS711X_MAJOR 204 -#define SERIAL_CLPS711X_MINOR 40 -#define SERIAL_CLPS711X_NR UART_NR - -/* - * We use the relevant SYSCON register as a base address for these ports. - */ -#define UBRLCR(port) ((port)->iobase + UBRLCR1 - SYSCON1) -#define UARTDR(port) ((port)->iobase + UARTDR1 - SYSCON1) -#define SYSFLG(port) ((port)->iobase + SYSFLG1 - SYSCON1) -#define SYSCON(port) ((port)->iobase + SYSCON1 - SYSCON1) - -#define TX_IRQ(port) ((port)->irq) -#define RX_IRQ(port) ((port)->irq + 1) - -#define UART_ANY_ERR (UARTDR_FRMERR | UARTDR_PARERR | UARTDR_OVERR) - -#define tx_enabled(port) ((port)->unused[0]) - -static void clps711xuart_stop_tx(struct uart_port *port) -{ - if (tx_enabled(port)) { - disable_irq(TX_IRQ(port)); - tx_enabled(port) = 0; - } -} - -static void clps711xuart_start_tx(struct uart_port *port) -{ - if (!tx_enabled(port)) { - enable_irq(TX_IRQ(port)); - tx_enabled(port) = 1; - } -} - -static void clps711xuart_stop_rx(struct uart_port *port) -{ - disable_irq(RX_IRQ(port)); -} - -static void clps711xuart_enable_ms(struct uart_port *port) -{ -} - -static irqreturn_t clps711xuart_int_rx(int irq, void *dev_id) -{ - struct uart_port *port = dev_id; - struct tty_struct *tty = port->state->port.tty; - unsigned int status, ch, flg; - - status = clps_readl(SYSFLG(port)); - while (!(status & SYSFLG_URXFE)) { - ch = clps_readl(UARTDR(port)); - - port->icount.rx++; - - flg = TTY_NORMAL; - - /* - * Note that the error handling code is - * out of the main execution path - */ - if (unlikely(ch & UART_ANY_ERR)) { - if (ch & UARTDR_PARERR) - port->icount.parity++; - else if (ch & UARTDR_FRMERR) - port->icount.frame++; - if (ch & UARTDR_OVERR) - port->icount.overrun++; - - ch &= port->read_status_mask; - - if (ch & UARTDR_PARERR) - flg = TTY_PARITY; - else if (ch & UARTDR_FRMERR) - flg = TTY_FRAME; - -#ifdef SUPPORT_SYSRQ - port->sysrq = 0; -#endif - } - - if (uart_handle_sysrq_char(port, ch)) - goto ignore_char; - - /* - * CHECK: does overrun affect the current character? - * ASSUMPTION: it does not. - */ - uart_insert_char(port, ch, UARTDR_OVERR, ch, flg); - - ignore_char: - status = clps_readl(SYSFLG(port)); - } - tty_flip_buffer_push(tty); - return IRQ_HANDLED; -} - -static irqreturn_t clps711xuart_int_tx(int irq, void *dev_id) -{ - struct uart_port *port = dev_id; - struct circ_buf *xmit = &port->state->xmit; - int count; - - if (port->x_char) { - clps_writel(port->x_char, UARTDR(port)); - port->icount.tx++; - port->x_char = 0; - return IRQ_HANDLED; - } - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - clps711xuart_stop_tx(port); - return IRQ_HANDLED; - } - - count = port->fifosize >> 1; - do { - clps_writel(xmit->buf[xmit->tail], UARTDR(port)); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - if (uart_circ_empty(xmit)) - break; - } while (--count > 0); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (uart_circ_empty(xmit)) - clps711xuart_stop_tx(port); - - return IRQ_HANDLED; -} - -static unsigned int clps711xuart_tx_empty(struct uart_port *port) -{ - unsigned int status = clps_readl(SYSFLG(port)); - return status & SYSFLG_UBUSY ? 0 : TIOCSER_TEMT; -} - -static unsigned int clps711xuart_get_mctrl(struct uart_port *port) -{ - unsigned int port_addr; - unsigned int result = 0; - unsigned int status; - - port_addr = SYSFLG(port); - if (port_addr == SYSFLG1) { - status = clps_readl(SYSFLG1); - if (status & SYSFLG1_DCD) - result |= TIOCM_CAR; - if (status & SYSFLG1_DSR) - result |= TIOCM_DSR; - if (status & SYSFLG1_CTS) - result |= TIOCM_CTS; - } - - return result; -} - -static void -clps711xuart_set_mctrl_null(struct uart_port *port, unsigned int mctrl) -{ -} - -static void clps711xuart_break_ctl(struct uart_port *port, int break_state) -{ - unsigned long flags; - unsigned int ubrlcr; - - spin_lock_irqsave(&port->lock, flags); - ubrlcr = clps_readl(UBRLCR(port)); - if (break_state == -1) - ubrlcr |= UBRLCR_BREAK; - else - ubrlcr &= ~UBRLCR_BREAK; - clps_writel(ubrlcr, UBRLCR(port)); - spin_unlock_irqrestore(&port->lock, flags); -} - -static int clps711xuart_startup(struct uart_port *port) -{ - unsigned int syscon; - int retval; - - tx_enabled(port) = 1; - - /* - * Allocate the IRQs - */ - retval = request_irq(TX_IRQ(port), clps711xuart_int_tx, 0, - "clps711xuart_tx", port); - if (retval) - return retval; - - retval = request_irq(RX_IRQ(port), clps711xuart_int_rx, 0, - "clps711xuart_rx", port); - if (retval) { - free_irq(TX_IRQ(port), port); - return retval; - } - - /* - * enable the port - */ - syscon = clps_readl(SYSCON(port)); - syscon |= SYSCON_UARTEN; - clps_writel(syscon, SYSCON(port)); - - return 0; -} - -static void clps711xuart_shutdown(struct uart_port *port) -{ - unsigned int ubrlcr, syscon; - - /* - * Free the interrupt - */ - free_irq(TX_IRQ(port), port); /* TX interrupt */ - free_irq(RX_IRQ(port), port); /* RX interrupt */ - - /* - * disable the port - */ - syscon = clps_readl(SYSCON(port)); - syscon &= ~SYSCON_UARTEN; - clps_writel(syscon, SYSCON(port)); - - /* - * disable break condition and fifos - */ - ubrlcr = clps_readl(UBRLCR(port)); - ubrlcr &= ~(UBRLCR_FIFOEN | UBRLCR_BREAK); - clps_writel(ubrlcr, UBRLCR(port)); -} - -static void -clps711xuart_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - unsigned int ubrlcr, baud, quot; - unsigned long flags; - - /* - * We don't implement CREAD. - */ - termios->c_cflag |= CREAD; - - /* - * Ask the core to calculate the divisor for us. - */ - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); - quot = uart_get_divisor(port, baud); - - switch (termios->c_cflag & CSIZE) { - case CS5: - ubrlcr = UBRLCR_WRDLEN5; - break; - case CS6: - ubrlcr = UBRLCR_WRDLEN6; - break; - case CS7: - ubrlcr = UBRLCR_WRDLEN7; - break; - default: // CS8 - ubrlcr = UBRLCR_WRDLEN8; - break; - } - if (termios->c_cflag & CSTOPB) - ubrlcr |= UBRLCR_XSTOP; - if (termios->c_cflag & PARENB) { - ubrlcr |= UBRLCR_PRTEN; - if (!(termios->c_cflag & PARODD)) - ubrlcr |= UBRLCR_EVENPRT; - } - if (port->fifosize > 1) - ubrlcr |= UBRLCR_FIFOEN; - - spin_lock_irqsave(&port->lock, flags); - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - port->read_status_mask = UARTDR_OVERR; - if (termios->c_iflag & INPCK) - port->read_status_mask |= UARTDR_PARERR | UARTDR_FRMERR; - - /* - * Characters to ignore - */ - port->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= UARTDR_FRMERR | UARTDR_PARERR; - if (termios->c_iflag & IGNBRK) { - /* - * If we're ignoring parity and break indicators, - * ignore overruns to (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= UARTDR_OVERR; - } - - quot -= 1; - - clps_writel(ubrlcr | quot, UBRLCR(port)); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *clps711xuart_type(struct uart_port *port) -{ - return port->type == PORT_CLPS711X ? "CLPS711x" : NULL; -} - -/* - * Configure/autoconfigure the port. - */ -static void clps711xuart_config_port(struct uart_port *port, int flags) -{ - if (flags & UART_CONFIG_TYPE) - port->type = PORT_CLPS711X; -} - -static void clps711xuart_release_port(struct uart_port *port) -{ -} - -static int clps711xuart_request_port(struct uart_port *port) -{ - return 0; -} - -static struct uart_ops clps711x_pops = { - .tx_empty = clps711xuart_tx_empty, - .set_mctrl = clps711xuart_set_mctrl_null, - .get_mctrl = clps711xuart_get_mctrl, - .stop_tx = clps711xuart_stop_tx, - .start_tx = clps711xuart_start_tx, - .stop_rx = clps711xuart_stop_rx, - .enable_ms = clps711xuart_enable_ms, - .break_ctl = clps711xuart_break_ctl, - .startup = clps711xuart_startup, - .shutdown = clps711xuart_shutdown, - .set_termios = clps711xuart_set_termios, - .type = clps711xuart_type, - .config_port = clps711xuart_config_port, - .release_port = clps711xuart_release_port, - .request_port = clps711xuart_request_port, -}; - -static struct uart_port clps711x_ports[UART_NR] = { - { - .iobase = SYSCON1, - .irq = IRQ_UTXINT1, /* IRQ_URXINT1, IRQ_UMSINT */ - .uartclk = 3686400, - .fifosize = 16, - .ops = &clps711x_pops, - .line = 0, - .flags = UPF_BOOT_AUTOCONF, - }, - { - .iobase = SYSCON2, - .irq = IRQ_UTXINT2, /* IRQ_URXINT2 */ - .uartclk = 3686400, - .fifosize = 16, - .ops = &clps711x_pops, - .line = 1, - .flags = UPF_BOOT_AUTOCONF, - } -}; - -#ifdef CONFIG_SERIAL_CLPS711X_CONSOLE -static void clps711xuart_console_putchar(struct uart_port *port, int ch) -{ - while (clps_readl(SYSFLG(port)) & SYSFLG_UTXFF) - barrier(); - clps_writel(ch, UARTDR(port)); -} - -/* - * Print a string to the serial port trying not to disturb - * any possible real use of the port... - * - * The console_lock must be held when we get here. - * - * Note that this is called with interrupts already disabled - */ -static void -clps711xuart_console_write(struct console *co, const char *s, - unsigned int count) -{ - struct uart_port *port = clps711x_ports + co->index; - unsigned int status, syscon; - - /* - * Ensure that the port is enabled. - */ - syscon = clps_readl(SYSCON(port)); - clps_writel(syscon | SYSCON_UARTEN, SYSCON(port)); - - uart_console_write(port, s, count, clps711xuart_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore the uart state. - */ - do { - status = clps_readl(SYSFLG(port)); - } while (status & SYSFLG_UBUSY); - - clps_writel(syscon, SYSCON(port)); -} - -static void __init -clps711xuart_console_get_options(struct uart_port *port, int *baud, - int *parity, int *bits) -{ - if (clps_readl(SYSCON(port)) & SYSCON_UARTEN) { - unsigned int ubrlcr, quot; - - ubrlcr = clps_readl(UBRLCR(port)); - - *parity = 'n'; - if (ubrlcr & UBRLCR_PRTEN) { - if (ubrlcr & UBRLCR_EVENPRT) - *parity = 'e'; - else - *parity = 'o'; - } - - if ((ubrlcr & UBRLCR_WRDLEN_MASK) == UBRLCR_WRDLEN7) - *bits = 7; - else - *bits = 8; - - quot = ubrlcr & UBRLCR_BAUD_MASK; - *baud = port->uartclk / (16 * (quot + 1)); - } -} - -static int __init clps711xuart_console_setup(struct console *co, char *options) -{ - struct uart_port *port; - int baud = 38400; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - port = uart_get_console(clps711x_ports, UART_NR, co); - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - else - clps711xuart_console_get_options(port, &baud, &parity, &bits); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - -static struct uart_driver clps711x_reg; -static struct console clps711x_console = { - .name = "ttyCL", - .write = clps711xuart_console_write, - .device = uart_console_device, - .setup = clps711xuart_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &clps711x_reg, -}; - -static int __init clps711xuart_console_init(void) -{ - register_console(&clps711x_console); - return 0; -} -console_initcall(clps711xuart_console_init); - -#define CLPS711X_CONSOLE &clps711x_console -#else -#define CLPS711X_CONSOLE NULL -#endif - -static struct uart_driver clps711x_reg = { - .driver_name = "ttyCL", - .dev_name = "ttyCL", - .major = SERIAL_CLPS711X_MAJOR, - .minor = SERIAL_CLPS711X_MINOR, - .nr = UART_NR, - - .cons = CLPS711X_CONSOLE, -}; - -static int __init clps711xuart_init(void) -{ - int ret, i; - - printk(KERN_INFO "Serial: CLPS711x driver\n"); - - ret = uart_register_driver(&clps711x_reg); - if (ret) - return ret; - - for (i = 0; i < UART_NR; i++) - uart_add_one_port(&clps711x_reg, &clps711x_ports[i]); - - return 0; -} - -static void __exit clps711xuart_exit(void) -{ - int i; - - for (i = 0; i < UART_NR; i++) - uart_remove_one_port(&clps711x_reg, &clps711x_ports[i]); - - uart_unregister_driver(&clps711x_reg); -} - -module_init(clps711xuart_init); -module_exit(clps711xuart_exit); - -MODULE_AUTHOR("Deep Blue Solutions Ltd"); -MODULE_DESCRIPTION("CLPS-711x generic serial driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_CHARDEV(SERIAL_CLPS711X_MAJOR, SERIAL_CLPS711X_MINOR); diff --git a/drivers/serial/cpm_uart/Makefile b/drivers/serial/cpm_uart/Makefile deleted file mode 100644 index e072724ea754..000000000000 --- a/drivers/serial/cpm_uart/Makefile +++ /dev/null @@ -1,11 +0,0 @@ -# -# Makefile for the Motorola 8xx FEC ethernet controller -# - -obj-$(CONFIG_SERIAL_CPM) += cpm_uart.o - -# Select the correct platform objects. -cpm_uart-objs-$(CONFIG_CPM2) += cpm_uart_cpm2.o -cpm_uart-objs-$(CONFIG_8xx) += cpm_uart_cpm1.o - -cpm_uart-objs := cpm_uart_core.o $(cpm_uart-objs-y) diff --git a/drivers/serial/cpm_uart/cpm_uart.h b/drivers/serial/cpm_uart/cpm_uart.h deleted file mode 100644 index b754dcf0fda5..000000000000 --- a/drivers/serial/cpm_uart/cpm_uart.h +++ /dev/null @@ -1,147 +0,0 @@ -/* - * linux/drivers/serial/cpm_uart.h - * - * Driver for CPM (SCC/SMC) serial ports - * - * Copyright (C) 2004 Freescale Semiconductor, Inc. - * - * 2006 (c) MontaVista Software, Inc. - * Vitaly Bordug <vbordug@ru.mvista.com> - * - * This file is licensed under the terms of the GNU General Public License - * version 2. This program is licensed "as is" without any warranty of any - * kind, whether express or implied. - * - */ -#ifndef CPM_UART_H -#define CPM_UART_H - -#include <linux/platform_device.h> -#include <linux/fs_uart_pd.h> - -#if defined(CONFIG_CPM2) -#include "cpm_uart_cpm2.h" -#elif defined(CONFIG_8xx) -#include "cpm_uart_cpm1.h" -#endif - -#define SERIAL_CPM_MAJOR 204 -#define SERIAL_CPM_MINOR 46 - -#define IS_SMC(pinfo) (pinfo->flags & FLAG_SMC) -#define IS_DISCARDING(pinfo) (pinfo->flags & FLAG_DISCARDING) -#define FLAG_DISCARDING 0x00000004 /* when set, don't discard */ -#define FLAG_SMC 0x00000002 -#define FLAG_CONSOLE 0x00000001 - -#define UART_SMC1 fsid_smc1_uart -#define UART_SMC2 fsid_smc2_uart -#define UART_SCC1 fsid_scc1_uart -#define UART_SCC2 fsid_scc2_uart -#define UART_SCC3 fsid_scc3_uart -#define UART_SCC4 fsid_scc4_uart - -#define UART_NR fs_uart_nr - -#define RX_NUM_FIFO 4 -#define RX_BUF_SIZE 32 -#define TX_NUM_FIFO 4 -#define TX_BUF_SIZE 32 - -#define SCC_WAIT_CLOSING 100 - -#define GPIO_CTS 0 -#define GPIO_RTS 1 -#define GPIO_DCD 2 -#define GPIO_DSR 3 -#define GPIO_DTR 4 -#define GPIO_RI 5 - -#define NUM_GPIOS (GPIO_RI+1) - -struct uart_cpm_port { - struct uart_port port; - u16 rx_nrfifos; - u16 rx_fifosize; - u16 tx_nrfifos; - u16 tx_fifosize; - smc_t __iomem *smcp; - smc_uart_t __iomem *smcup; - scc_t __iomem *sccp; - scc_uart_t __iomem *sccup; - cbd_t __iomem *rx_bd_base; - cbd_t __iomem *rx_cur; - cbd_t __iomem *tx_bd_base; - cbd_t __iomem *tx_cur; - unsigned char *tx_buf; - unsigned char *rx_buf; - u32 flags; - struct clk *clk; - u8 brg; - uint dp_addr; - void *mem_addr; - dma_addr_t dma_addr; - u32 mem_size; - /* wait on close if needed */ - int wait_closing; - /* value to combine with opcode to form cpm command */ - u32 command; - int gpios[NUM_GPIOS]; -}; - -extern int cpm_uart_nr; -extern struct uart_cpm_port cpm_uart_ports[UART_NR]; - -/* these are located in their respective files */ -void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd); -void __iomem *cpm_uart_map_pram(struct uart_cpm_port *port, - struct device_node *np); -void cpm_uart_unmap_pram(struct uart_cpm_port *port, void __iomem *pram); -int cpm_uart_init_portdesc(void); -int cpm_uart_allocbuf(struct uart_cpm_port *pinfo, unsigned int is_con); -void cpm_uart_freebuf(struct uart_cpm_port *pinfo); - -void smc1_lineif(struct uart_cpm_port *pinfo); -void smc2_lineif(struct uart_cpm_port *pinfo); -void scc1_lineif(struct uart_cpm_port *pinfo); -void scc2_lineif(struct uart_cpm_port *pinfo); -void scc3_lineif(struct uart_cpm_port *pinfo); -void scc4_lineif(struct uart_cpm_port *pinfo); - -/* - virtual to phys transtalion -*/ -static inline unsigned long cpu2cpm_addr(void *addr, - struct uart_cpm_port *pinfo) -{ - int offset; - u32 val = (u32)addr; - u32 mem = (u32)pinfo->mem_addr; - /* sane check */ - if (likely(val >= mem && val < mem + pinfo->mem_size)) { - offset = val - mem; - return pinfo->dma_addr + offset; - } - /* something nasty happened */ - BUG(); - return 0; -} - -static inline void *cpm2cpu_addr(unsigned long addr, - struct uart_cpm_port *pinfo) -{ - int offset; - u32 val = addr; - u32 dma = (u32)pinfo->dma_addr; - /* sane check */ - if (likely(val >= dma && val < dma + pinfo->mem_size)) { - offset = val - dma; - return pinfo->mem_addr + offset; - } - /* something nasty happened */ - BUG(); - return NULL; -} - - -#endif /* CPM_UART_H */ diff --git a/drivers/serial/cpm_uart/cpm_uart_core.c b/drivers/serial/cpm_uart/cpm_uart_core.c deleted file mode 100644 index 8692ff98fc07..000000000000 --- a/drivers/serial/cpm_uart/cpm_uart_core.c +++ /dev/null @@ -1,1443 +0,0 @@ -/* - * linux/drivers/serial/cpm_uart.c - * - * Driver for CPM (SCC/SMC) serial ports; core driver - * - * Based on arch/ppc/cpm2_io/uart.c by Dan Malek - * Based on ppc8xx.c by Thomas Gleixner - * Based on drivers/serial/amba.c by Russell King - * - * Maintainer: Kumar Gala (galak@kernel.crashing.org) (CPM2) - * Pantelis Antoniou (panto@intracom.gr) (CPM1) - * - * Copyright (C) 2004, 2007 Freescale Semiconductor, Inc. - * (C) 2004 Intracom, S.A. - * (C) 2005-2006 MontaVista Software, Inc. - * Vitaly Bordug <vbordug@ru.mvista.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ - -#include <linux/module.h> -#include <linux/tty.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/serial.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/device.h> -#include <linux/bootmem.h> -#include <linux/dma-mapping.h> -#include <linux/fs_uart_pd.h> -#include <linux/of_platform.h> -#include <linux/gpio.h> -#include <linux/of_gpio.h> -#include <linux/clk.h> - -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/delay.h> -#include <asm/fs_pd.h> -#include <asm/udbg.h> - -#if defined(CONFIG_SERIAL_CPM_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/serial_core.h> -#include <linux/kernel.h> - -#include "cpm_uart.h" - - -/**************************************************************/ - -static int cpm_uart_tx_pump(struct uart_port *port); -static void cpm_uart_init_smc(struct uart_cpm_port *pinfo); -static void cpm_uart_init_scc(struct uart_cpm_port *pinfo); -static void cpm_uart_initbd(struct uart_cpm_port *pinfo); - -/**************************************************************/ - -#define HW_BUF_SPD_THRESHOLD 9600 - -/* - * Check, if transmit buffers are processed -*/ -static unsigned int cpm_uart_tx_empty(struct uart_port *port) -{ - struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; - cbd_t __iomem *bdp = pinfo->tx_bd_base; - int ret = 0; - - while (1) { - if (in_be16(&bdp->cbd_sc) & BD_SC_READY) - break; - - if (in_be16(&bdp->cbd_sc) & BD_SC_WRAP) { - ret = TIOCSER_TEMT; - break; - } - bdp++; - } - - pr_debug("CPM uart[%d]:tx_empty: %d\n", port->line, ret); - - return ret; -} - -static void cpm_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; - - if (pinfo->gpios[GPIO_RTS] >= 0) - gpio_set_value(pinfo->gpios[GPIO_RTS], !(mctrl & TIOCM_RTS)); - - if (pinfo->gpios[GPIO_DTR] >= 0) - gpio_set_value(pinfo->gpios[GPIO_DTR], !(mctrl & TIOCM_DTR)); -} - -static unsigned int cpm_uart_get_mctrl(struct uart_port *port) -{ - struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; - unsigned int mctrl = TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; - - if (pinfo->gpios[GPIO_CTS] >= 0) { - if (gpio_get_value(pinfo->gpios[GPIO_CTS])) - mctrl &= ~TIOCM_CTS; - } - - if (pinfo->gpios[GPIO_DSR] >= 0) { - if (gpio_get_value(pinfo->gpios[GPIO_DSR])) - mctrl &= ~TIOCM_DSR; - } - - if (pinfo->gpios[GPIO_DCD] >= 0) { - if (gpio_get_value(pinfo->gpios[GPIO_DCD])) - mctrl &= ~TIOCM_CAR; - } - - if (pinfo->gpios[GPIO_RI] >= 0) { - if (!gpio_get_value(pinfo->gpios[GPIO_RI])) - mctrl |= TIOCM_RNG; - } - - return mctrl; -} - -/* - * Stop transmitter - */ -static void cpm_uart_stop_tx(struct uart_port *port) -{ - struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; - smc_t __iomem *smcp = pinfo->smcp; - scc_t __iomem *sccp = pinfo->sccp; - - pr_debug("CPM uart[%d]:stop tx\n", port->line); - - if (IS_SMC(pinfo)) - clrbits8(&smcp->smc_smcm, SMCM_TX); - else - clrbits16(&sccp->scc_sccm, UART_SCCM_TX); -} - -/* - * Start transmitter - */ -static void cpm_uart_start_tx(struct uart_port *port) -{ - struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; - smc_t __iomem *smcp = pinfo->smcp; - scc_t __iomem *sccp = pinfo->sccp; - - pr_debug("CPM uart[%d]:start tx\n", port->line); - - if (IS_SMC(pinfo)) { - if (in_8(&smcp->smc_smcm) & SMCM_TX) - return; - } else { - if (in_be16(&sccp->scc_sccm) & UART_SCCM_TX) - return; - } - - if (cpm_uart_tx_pump(port) != 0) { - if (IS_SMC(pinfo)) { - setbits8(&smcp->smc_smcm, SMCM_TX); - } else { - setbits16(&sccp->scc_sccm, UART_SCCM_TX); - } - } -} - -/* - * Stop receiver - */ -static void cpm_uart_stop_rx(struct uart_port *port) -{ - struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; - smc_t __iomem *smcp = pinfo->smcp; - scc_t __iomem *sccp = pinfo->sccp; - - pr_debug("CPM uart[%d]:stop rx\n", port->line); - - if (IS_SMC(pinfo)) - clrbits8(&smcp->smc_smcm, SMCM_RX); - else - clrbits16(&sccp->scc_sccm, UART_SCCM_RX); -} - -/* - * Enable Modem status interrupts - */ -static void cpm_uart_enable_ms(struct uart_port *port) -{ - pr_debug("CPM uart[%d]:enable ms\n", port->line); -} - -/* - * Generate a break. - */ -static void cpm_uart_break_ctl(struct uart_port *port, int break_state) -{ - struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; - - pr_debug("CPM uart[%d]:break ctrl, break_state: %d\n", port->line, - break_state); - - if (break_state) - cpm_line_cr_cmd(pinfo, CPM_CR_STOP_TX); - else - cpm_line_cr_cmd(pinfo, CPM_CR_RESTART_TX); -} - -/* - * Transmit characters, refill buffer descriptor, if possible - */ -static void cpm_uart_int_tx(struct uart_port *port) -{ - pr_debug("CPM uart[%d]:TX INT\n", port->line); - - cpm_uart_tx_pump(port); -} - -#ifdef CONFIG_CONSOLE_POLL -static int serial_polled; -#endif - -/* - * Receive characters - */ -static void cpm_uart_int_rx(struct uart_port *port) -{ - int i; - unsigned char ch; - u8 *cp; - struct tty_struct *tty = port->state->port.tty; - struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; - cbd_t __iomem *bdp; - u16 status; - unsigned int flg; - - pr_debug("CPM uart[%d]:RX INT\n", port->line); - - /* Just loop through the closed BDs and copy the characters into - * the buffer. - */ - bdp = pinfo->rx_cur; - for (;;) { -#ifdef CONFIG_CONSOLE_POLL - if (unlikely(serial_polled)) { - serial_polled = 0; - return; - } -#endif - /* get status */ - status = in_be16(&bdp->cbd_sc); - /* If this one is empty, return happy */ - if (status & BD_SC_EMPTY) - break; - - /* get number of characters, and check spce in flip-buffer */ - i = in_be16(&bdp->cbd_datlen); - - /* If we have not enough room in tty flip buffer, then we try - * later, which will be the next rx-interrupt or a timeout - */ - if(tty_buffer_request_room(tty, i) < i) { - printk(KERN_WARNING "No room in flip buffer\n"); - return; - } - - /* get pointer */ - cp = cpm2cpu_addr(in_be32(&bdp->cbd_bufaddr), pinfo); - - /* loop through the buffer */ - while (i-- > 0) { - ch = *cp++; - port->icount.rx++; - flg = TTY_NORMAL; - - if (status & - (BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV)) - goto handle_error; - if (uart_handle_sysrq_char(port, ch)) - continue; -#ifdef CONFIG_CONSOLE_POLL - if (unlikely(serial_polled)) { - serial_polled = 0; - return; - } -#endif - error_return: - tty_insert_flip_char(tty, ch, flg); - - } /* End while (i--) */ - - /* This BD is ready to be used again. Clear status. get next */ - clrbits16(&bdp->cbd_sc, BD_SC_BR | BD_SC_FR | BD_SC_PR | - BD_SC_OV | BD_SC_ID); - setbits16(&bdp->cbd_sc, BD_SC_EMPTY); - - if (in_be16(&bdp->cbd_sc) & BD_SC_WRAP) - bdp = pinfo->rx_bd_base; - else - bdp++; - - } /* End for (;;) */ - - /* Write back buffer pointer */ - pinfo->rx_cur = bdp; - - /* activate BH processing */ - tty_flip_buffer_push(tty); - - return; - - /* Error processing */ - - handle_error: - /* Statistics */ - if (status & BD_SC_BR) - port->icount.brk++; - if (status & BD_SC_PR) - port->icount.parity++; - if (status & BD_SC_FR) - port->icount.frame++; - if (status & BD_SC_OV) - port->icount.overrun++; - - /* Mask out ignored conditions */ - status &= port->read_status_mask; - - /* Handle the remaining ones */ - if (status & BD_SC_BR) - flg = TTY_BREAK; - else if (status & BD_SC_PR) - flg = TTY_PARITY; - else if (status & BD_SC_FR) - flg = TTY_FRAME; - - /* overrun does not affect the current character ! */ - if (status & BD_SC_OV) { - ch = 0; - flg = TTY_OVERRUN; - /* We skip this buffer */ - /* CHECK: Is really nothing senseful there */ - /* ASSUMPTION: it contains nothing valid */ - i = 0; - } -#ifdef SUPPORT_SYSRQ - port->sysrq = 0; -#endif - goto error_return; -} - -/* - * Asynchron mode interrupt handler - */ -static irqreturn_t cpm_uart_int(int irq, void *data) -{ - u8 events; - struct uart_port *port = data; - struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; - smc_t __iomem *smcp = pinfo->smcp; - scc_t __iomem *sccp = pinfo->sccp; - - pr_debug("CPM uart[%d]:IRQ\n", port->line); - - if (IS_SMC(pinfo)) { - events = in_8(&smcp->smc_smce); - out_8(&smcp->smc_smce, events); - if (events & SMCM_BRKE) - uart_handle_break(port); - if (events & SMCM_RX) - cpm_uart_int_rx(port); - if (events & SMCM_TX) - cpm_uart_int_tx(port); - } else { - events = in_be16(&sccp->scc_scce); - out_be16(&sccp->scc_scce, events); - if (events & UART_SCCM_BRKE) - uart_handle_break(port); - if (events & UART_SCCM_RX) - cpm_uart_int_rx(port); - if (events & UART_SCCM_TX) - cpm_uart_int_tx(port); - } - return (events) ? IRQ_HANDLED : IRQ_NONE; -} - -static int cpm_uart_startup(struct uart_port *port) -{ - int retval; - struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; - - pr_debug("CPM uart[%d]:startup\n", port->line); - - /* If the port is not the console, make sure rx is disabled. */ - if (!(pinfo->flags & FLAG_CONSOLE)) { - /* Disable UART rx */ - if (IS_SMC(pinfo)) { - clrbits16(&pinfo->smcp->smc_smcmr, SMCMR_REN); - clrbits8(&pinfo->smcp->smc_smcm, SMCM_RX); - } else { - clrbits32(&pinfo->sccp->scc_gsmrl, SCC_GSMRL_ENR); - clrbits16(&pinfo->sccp->scc_sccm, UART_SCCM_RX); - } - cpm_line_cr_cmd(pinfo, CPM_CR_INIT_TRX); - } - /* Install interrupt handler. */ - retval = request_irq(port->irq, cpm_uart_int, 0, "cpm_uart", port); - if (retval) - return retval; - - /* Startup rx-int */ - if (IS_SMC(pinfo)) { - setbits8(&pinfo->smcp->smc_smcm, SMCM_RX); - setbits16(&pinfo->smcp->smc_smcmr, (SMCMR_REN | SMCMR_TEN)); - } else { - setbits16(&pinfo->sccp->scc_sccm, UART_SCCM_RX); - setbits32(&pinfo->sccp->scc_gsmrl, (SCC_GSMRL_ENR | SCC_GSMRL_ENT)); - } - - return 0; -} - -inline void cpm_uart_wait_until_send(struct uart_cpm_port *pinfo) -{ - set_current_state(TASK_UNINTERRUPTIBLE); - schedule_timeout(pinfo->wait_closing); -} - -/* - * Shutdown the uart - */ -static void cpm_uart_shutdown(struct uart_port *port) -{ - struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; - - pr_debug("CPM uart[%d]:shutdown\n", port->line); - - /* free interrupt handler */ - free_irq(port->irq, port); - - /* If the port is not the console, disable Rx and Tx. */ - if (!(pinfo->flags & FLAG_CONSOLE)) { - /* Wait for all the BDs marked sent */ - while(!cpm_uart_tx_empty(port)) { - set_current_state(TASK_UNINTERRUPTIBLE); - schedule_timeout(2); - } - - if (pinfo->wait_closing) - cpm_uart_wait_until_send(pinfo); - - /* Stop uarts */ - if (IS_SMC(pinfo)) { - smc_t __iomem *smcp = pinfo->smcp; - clrbits16(&smcp->smc_smcmr, SMCMR_REN | SMCMR_TEN); - clrbits8(&smcp->smc_smcm, SMCM_RX | SMCM_TX); - } else { - scc_t __iomem *sccp = pinfo->sccp; - clrbits32(&sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT); - clrbits16(&sccp->scc_sccm, UART_SCCM_TX | UART_SCCM_RX); - } - - /* Shut them really down and reinit buffer descriptors */ - if (IS_SMC(pinfo)) { - out_be16(&pinfo->smcup->smc_brkcr, 0); - cpm_line_cr_cmd(pinfo, CPM_CR_STOP_TX); - } else { - out_be16(&pinfo->sccup->scc_brkcr, 0); - cpm_line_cr_cmd(pinfo, CPM_CR_GRA_STOP_TX); - } - - cpm_uart_initbd(pinfo); - } -} - -static void cpm_uart_set_termios(struct uart_port *port, - struct ktermios *termios, - struct ktermios *old) -{ - int baud; - unsigned long flags; - u16 cval, scval, prev_mode; - int bits, sbits; - struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; - smc_t __iomem *smcp = pinfo->smcp; - scc_t __iomem *sccp = pinfo->sccp; - - pr_debug("CPM uart[%d]:set_termios\n", port->line); - - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16); - if (baud <= HW_BUF_SPD_THRESHOLD || - (pinfo->port.state && pinfo->port.state->port.tty->low_latency)) - pinfo->rx_fifosize = 1; - else - pinfo->rx_fifosize = RX_BUF_SIZE; - - /* Character length programmed into the mode register is the - * sum of: 1 start bit, number of data bits, 0 or 1 parity bit, - * 1 or 2 stop bits, minus 1. - * The value 'bits' counts this for us. - */ - cval = 0; - scval = 0; - - /* byte size */ - switch (termios->c_cflag & CSIZE) { - case CS5: - bits = 5; - break; - case CS6: - bits = 6; - break; - case CS7: - bits = 7; - break; - case CS8: - bits = 8; - break; - /* Never happens, but GCC is too dumb to figure it out */ - default: - bits = 8; - break; - } - sbits = bits - 5; - - if (termios->c_cflag & CSTOPB) { - cval |= SMCMR_SL; /* Two stops */ - scval |= SCU_PSMR_SL; - bits++; - } - - if (termios->c_cflag & PARENB) { - cval |= SMCMR_PEN; - scval |= SCU_PSMR_PEN; - bits++; - if (!(termios->c_cflag & PARODD)) { - cval |= SMCMR_PM_EVEN; - scval |= (SCU_PSMR_REVP | SCU_PSMR_TEVP); - } - } - - /* - * Update the timeout - */ - uart_update_timeout(port, termios->c_cflag, baud); - - /* - * Set up parity check flag - */ -#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) - - port->read_status_mask = (BD_SC_EMPTY | BD_SC_OV); - if (termios->c_iflag & INPCK) - port->read_status_mask |= BD_SC_FR | BD_SC_PR; - if ((termios->c_iflag & BRKINT) || (termios->c_iflag & PARMRK)) - port->read_status_mask |= BD_SC_BR; - - /* - * Characters to ignore - */ - port->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= BD_SC_PR | BD_SC_FR; - if (termios->c_iflag & IGNBRK) { - port->ignore_status_mask |= BD_SC_BR; - /* - * If we're ignore parity and break indicators, ignore - * overruns too. (For real raw support). - */ - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= BD_SC_OV; - } - /* - * !!! ignore all characters if CREAD is not set - */ - if ((termios->c_cflag & CREAD) == 0) - port->read_status_mask &= ~BD_SC_EMPTY; - - spin_lock_irqsave(&port->lock, flags); - - /* Start bit has not been added (so don't, because we would just - * subtract it later), and we need to add one for the number of - * stops bits (there is always at least one). - */ - bits++; - if (IS_SMC(pinfo)) { - /* - * MRBLR can be changed while an SMC/SCC is operating only - * if it is done in a single bus cycle with one 16-bit move - * (not two 8-bit bus cycles back-to-back). This occurs when - * the cp shifts control to the next RxBD, so the change does - * not take effect immediately. To guarantee the exact RxBD - * on which the change occurs, change MRBLR only while the - * SMC/SCC receiver is disabled. - */ - out_be16(&pinfo->smcup->smc_mrblr, pinfo->rx_fifosize); - - /* Set the mode register. We want to keep a copy of the - * enables, because we want to put them back if they were - * present. - */ - prev_mode = in_be16(&smcp->smc_smcmr) & (SMCMR_REN | SMCMR_TEN); - /* Output in *one* operation, so we don't interrupt RX/TX if they - * were already enabled. */ - out_be16(&smcp->smc_smcmr, smcr_mk_clen(bits) | cval | - SMCMR_SM_UART | prev_mode); - } else { - out_be16(&pinfo->sccup->scc_genscc.scc_mrblr, pinfo->rx_fifosize); - out_be16(&sccp->scc_psmr, (sbits << 12) | scval); - } - - if (pinfo->clk) - clk_set_rate(pinfo->clk, baud); - else - cpm_set_brg(pinfo->brg - 1, baud); - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *cpm_uart_type(struct uart_port *port) -{ - pr_debug("CPM uart[%d]:uart_type\n", port->line); - - return port->type == PORT_CPM ? "CPM UART" : NULL; -} - -/* - * verify the new serial_struct (for TIOCSSERIAL). - */ -static int cpm_uart_verify_port(struct uart_port *port, - struct serial_struct *ser) -{ - int ret = 0; - - pr_debug("CPM uart[%d]:verify_port\n", port->line); - - if (ser->type != PORT_UNKNOWN && ser->type != PORT_CPM) - ret = -EINVAL; - if (ser->irq < 0 || ser->irq >= nr_irqs) - ret = -EINVAL; - if (ser->baud_base < 9600) - ret = -EINVAL; - return ret; -} - -/* - * Transmit characters, refill buffer descriptor, if possible - */ -static int cpm_uart_tx_pump(struct uart_port *port) -{ - cbd_t __iomem *bdp; - u8 *p; - int count; - struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; - struct circ_buf *xmit = &port->state->xmit; - - /* Handle xon/xoff */ - if (port->x_char) { - /* Pick next descriptor and fill from buffer */ - bdp = pinfo->tx_cur; - - p = cpm2cpu_addr(in_be32(&bdp->cbd_bufaddr), pinfo); - - *p++ = port->x_char; - - out_be16(&bdp->cbd_datlen, 1); - setbits16(&bdp->cbd_sc, BD_SC_READY); - /* Get next BD. */ - if (in_be16(&bdp->cbd_sc) & BD_SC_WRAP) - bdp = pinfo->tx_bd_base; - else - bdp++; - pinfo->tx_cur = bdp; - - port->icount.tx++; - port->x_char = 0; - return 1; - } - - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - cpm_uart_stop_tx(port); - return 0; - } - - /* Pick next descriptor and fill from buffer */ - bdp = pinfo->tx_cur; - - while (!(in_be16(&bdp->cbd_sc) & BD_SC_READY) && - xmit->tail != xmit->head) { - count = 0; - p = cpm2cpu_addr(in_be32(&bdp->cbd_bufaddr), pinfo); - while (count < pinfo->tx_fifosize) { - *p++ = xmit->buf[xmit->tail]; - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - count++; - if (xmit->head == xmit->tail) - break; - } - out_be16(&bdp->cbd_datlen, count); - setbits16(&bdp->cbd_sc, BD_SC_READY); - /* Get next BD. */ - if (in_be16(&bdp->cbd_sc) & BD_SC_WRAP) - bdp = pinfo->tx_bd_base; - else - bdp++; - } - pinfo->tx_cur = bdp; - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (uart_circ_empty(xmit)) { - cpm_uart_stop_tx(port); - return 0; - } - - return 1; -} - -/* - * init buffer descriptors - */ -static void cpm_uart_initbd(struct uart_cpm_port *pinfo) -{ - int i; - u8 *mem_addr; - cbd_t __iomem *bdp; - - pr_debug("CPM uart[%d]:initbd\n", pinfo->port.line); - - /* Set the physical address of the host memory - * buffers in the buffer descriptors, and the - * virtual address for us to work with. - */ - mem_addr = pinfo->mem_addr; - bdp = pinfo->rx_cur = pinfo->rx_bd_base; - for (i = 0; i < (pinfo->rx_nrfifos - 1); i++, bdp++) { - out_be32(&bdp->cbd_bufaddr, cpu2cpm_addr(mem_addr, pinfo)); - out_be16(&bdp->cbd_sc, BD_SC_EMPTY | BD_SC_INTRPT); - mem_addr += pinfo->rx_fifosize; - } - - out_be32(&bdp->cbd_bufaddr, cpu2cpm_addr(mem_addr, pinfo)); - out_be16(&bdp->cbd_sc, BD_SC_WRAP | BD_SC_EMPTY | BD_SC_INTRPT); - - /* Set the physical address of the host memory - * buffers in the buffer descriptors, and the - * virtual address for us to work with. - */ - mem_addr = pinfo->mem_addr + L1_CACHE_ALIGN(pinfo->rx_nrfifos * pinfo->rx_fifosize); - bdp = pinfo->tx_cur = pinfo->tx_bd_base; - for (i = 0; i < (pinfo->tx_nrfifos - 1); i++, bdp++) { - out_be32(&bdp->cbd_bufaddr, cpu2cpm_addr(mem_addr, pinfo)); - out_be16(&bdp->cbd_sc, BD_SC_INTRPT); - mem_addr += pinfo->tx_fifosize; - } - - out_be32(&bdp->cbd_bufaddr, cpu2cpm_addr(mem_addr, pinfo)); - out_be16(&bdp->cbd_sc, BD_SC_WRAP | BD_SC_INTRPT); -} - -static void cpm_uart_init_scc(struct uart_cpm_port *pinfo) -{ - scc_t __iomem *scp; - scc_uart_t __iomem *sup; - - pr_debug("CPM uart[%d]:init_scc\n", pinfo->port.line); - - scp = pinfo->sccp; - sup = pinfo->sccup; - - /* Store address */ - out_be16(&pinfo->sccup->scc_genscc.scc_rbase, - (u8 __iomem *)pinfo->rx_bd_base - DPRAM_BASE); - out_be16(&pinfo->sccup->scc_genscc.scc_tbase, - (u8 __iomem *)pinfo->tx_bd_base - DPRAM_BASE); - - /* Set up the uart parameters in the - * parameter ram. - */ - - cpm_set_scc_fcr(sup); - - out_be16(&sup->scc_genscc.scc_mrblr, pinfo->rx_fifosize); - out_be16(&sup->scc_maxidl, pinfo->rx_fifosize); - out_be16(&sup->scc_brkcr, 1); - out_be16(&sup->scc_parec, 0); - out_be16(&sup->scc_frmec, 0); - out_be16(&sup->scc_nosec, 0); - out_be16(&sup->scc_brkec, 0); - out_be16(&sup->scc_uaddr1, 0); - out_be16(&sup->scc_uaddr2, 0); - out_be16(&sup->scc_toseq, 0); - out_be16(&sup->scc_char1, 0x8000); - out_be16(&sup->scc_char2, 0x8000); - out_be16(&sup->scc_char3, 0x8000); - out_be16(&sup->scc_char4, 0x8000); - out_be16(&sup->scc_char5, 0x8000); - out_be16(&sup->scc_char6, 0x8000); - out_be16(&sup->scc_char7, 0x8000); - out_be16(&sup->scc_char8, 0x8000); - out_be16(&sup->scc_rccm, 0xc0ff); - - /* Send the CPM an initialize command. - */ - cpm_line_cr_cmd(pinfo, CPM_CR_INIT_TRX); - - /* Set UART mode, 8 bit, no parity, one stop. - * Enable receive and transmit. - */ - out_be32(&scp->scc_gsmrh, 0); - out_be32(&scp->scc_gsmrl, - SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16); - - /* Enable rx interrupts and clear all pending events. */ - out_be16(&scp->scc_sccm, 0); - out_be16(&scp->scc_scce, 0xffff); - out_be16(&scp->scc_dsr, 0x7e7e); - out_be16(&scp->scc_psmr, 0x3000); - - setbits32(&scp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT); -} - -static void cpm_uart_init_smc(struct uart_cpm_port *pinfo) -{ - smc_t __iomem *sp; - smc_uart_t __iomem *up; - - pr_debug("CPM uart[%d]:init_smc\n", pinfo->port.line); - - sp = pinfo->smcp; - up = pinfo->smcup; - - /* Store address */ - out_be16(&pinfo->smcup->smc_rbase, - (u8 __iomem *)pinfo->rx_bd_base - DPRAM_BASE); - out_be16(&pinfo->smcup->smc_tbase, - (u8 __iomem *)pinfo->tx_bd_base - DPRAM_BASE); - -/* - * In case SMC1 is being relocated... - */ -#if defined (CONFIG_I2C_SPI_SMC1_UCODE_PATCH) - out_be16(&up->smc_rbptr, in_be16(&pinfo->smcup->smc_rbase)); - out_be16(&up->smc_tbptr, in_be16(&pinfo->smcup->smc_tbase)); - out_be32(&up->smc_rstate, 0); - out_be32(&up->smc_tstate, 0); - out_be16(&up->smc_brkcr, 1); /* number of break chars */ - out_be16(&up->smc_brkec, 0); -#endif - - /* Set up the uart parameters in the - * parameter ram. - */ - cpm_set_smc_fcr(up); - - /* Using idle character time requires some additional tuning. */ - out_be16(&up->smc_mrblr, pinfo->rx_fifosize); - out_be16(&up->smc_maxidl, pinfo->rx_fifosize); - out_be16(&up->smc_brklen, 0); - out_be16(&up->smc_brkec, 0); - out_be16(&up->smc_brkcr, 1); - - cpm_line_cr_cmd(pinfo, CPM_CR_INIT_TRX); - - /* Set UART mode, 8 bit, no parity, one stop. - * Enable receive and transmit. - */ - out_be16(&sp->smc_smcmr, smcr_mk_clen(9) | SMCMR_SM_UART); - - /* Enable only rx interrupts clear all pending events. */ - out_8(&sp->smc_smcm, 0); - out_8(&sp->smc_smce, 0xff); - - setbits16(&sp->smc_smcmr, SMCMR_REN | SMCMR_TEN); -} - -/* - * Initialize port. This is called from early_console stuff - * so we have to be careful here ! - */ -static int cpm_uart_request_port(struct uart_port *port) -{ - struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; - int ret; - - pr_debug("CPM uart[%d]:request port\n", port->line); - - if (pinfo->flags & FLAG_CONSOLE) - return 0; - - if (IS_SMC(pinfo)) { - clrbits8(&pinfo->smcp->smc_smcm, SMCM_RX | SMCM_TX); - clrbits16(&pinfo->smcp->smc_smcmr, SMCMR_REN | SMCMR_TEN); - } else { - clrbits16(&pinfo->sccp->scc_sccm, UART_SCCM_TX | UART_SCCM_RX); - clrbits32(&pinfo->sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT); - } - - ret = cpm_uart_allocbuf(pinfo, 0); - - if (ret) - return ret; - - cpm_uart_initbd(pinfo); - if (IS_SMC(pinfo)) - cpm_uart_init_smc(pinfo); - else - cpm_uart_init_scc(pinfo); - - return 0; -} - -static void cpm_uart_release_port(struct uart_port *port) -{ - struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; - - if (!(pinfo->flags & FLAG_CONSOLE)) - cpm_uart_freebuf(pinfo); -} - -/* - * Configure/autoconfigure the port. - */ -static void cpm_uart_config_port(struct uart_port *port, int flags) -{ - pr_debug("CPM uart[%d]:config_port\n", port->line); - - if (flags & UART_CONFIG_TYPE) { - port->type = PORT_CPM; - cpm_uart_request_port(port); - } -} - -#if defined(CONFIG_CONSOLE_POLL) || defined(CONFIG_SERIAL_CPM_CONSOLE) -/* - * Write a string to the serial port - * Note that this is called with interrupts already disabled - */ -static void cpm_uart_early_write(struct uart_cpm_port *pinfo, - const char *string, u_int count) -{ - unsigned int i; - cbd_t __iomem *bdp, *bdbase; - unsigned char *cpm_outp_addr; - - /* Get the address of the host memory buffer. - */ - bdp = pinfo->tx_cur; - bdbase = pinfo->tx_bd_base; - - /* - * Now, do each character. This is not as bad as it looks - * since this is a holding FIFO and not a transmitting FIFO. - * We could add the complexity of filling the entire transmit - * buffer, but we would just wait longer between accesses...... - */ - for (i = 0; i < count; i++, string++) { - /* Wait for transmitter fifo to empty. - * Ready indicates output is ready, and xmt is doing - * that, not that it is ready for us to send. - */ - while ((in_be16(&bdp->cbd_sc) & BD_SC_READY) != 0) - ; - - /* Send the character out. - * If the buffer address is in the CPM DPRAM, don't - * convert it. - */ - cpm_outp_addr = cpm2cpu_addr(in_be32(&bdp->cbd_bufaddr), - pinfo); - *cpm_outp_addr = *string; - - out_be16(&bdp->cbd_datlen, 1); - setbits16(&bdp->cbd_sc, BD_SC_READY); - - if (in_be16(&bdp->cbd_sc) & BD_SC_WRAP) - bdp = bdbase; - else - bdp++; - - /* if a LF, also do CR... */ - if (*string == 10) { - while ((in_be16(&bdp->cbd_sc) & BD_SC_READY) != 0) - ; - - cpm_outp_addr = cpm2cpu_addr(in_be32(&bdp->cbd_bufaddr), - pinfo); - *cpm_outp_addr = 13; - - out_be16(&bdp->cbd_datlen, 1); - setbits16(&bdp->cbd_sc, BD_SC_READY); - - if (in_be16(&bdp->cbd_sc) & BD_SC_WRAP) - bdp = bdbase; - else - bdp++; - } - } - - /* - * Finally, Wait for transmitter & holding register to empty - * and restore the IER - */ - while ((in_be16(&bdp->cbd_sc) & BD_SC_READY) != 0) - ; - - pinfo->tx_cur = bdp; -} -#endif - -#ifdef CONFIG_CONSOLE_POLL -/* Serial polling routines for writing and reading from the uart while - * in an interrupt or debug context. - */ - -#define GDB_BUF_SIZE 512 /* power of 2, please */ - -static char poll_buf[GDB_BUF_SIZE]; -static char *pollp; -static int poll_chars; - -static int poll_wait_key(char *obuf, struct uart_cpm_port *pinfo) -{ - u_char c, *cp; - volatile cbd_t *bdp; - int i; - - /* Get the address of the host memory buffer. - */ - bdp = pinfo->rx_cur; - while (bdp->cbd_sc & BD_SC_EMPTY) - ; - - /* If the buffer address is in the CPM DPRAM, don't - * convert it. - */ - cp = cpm2cpu_addr(bdp->cbd_bufaddr, pinfo); - - if (obuf) { - i = c = bdp->cbd_datlen; - while (i-- > 0) - *obuf++ = *cp++; - } else - c = *cp; - bdp->cbd_sc &= ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV | BD_SC_ID); - bdp->cbd_sc |= BD_SC_EMPTY; - - if (bdp->cbd_sc & BD_SC_WRAP) - bdp = pinfo->rx_bd_base; - else - bdp++; - pinfo->rx_cur = (cbd_t *)bdp; - - return (int)c; -} - -static int cpm_get_poll_char(struct uart_port *port) -{ - struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; - - if (!serial_polled) { - serial_polled = 1; - poll_chars = 0; - } - if (poll_chars <= 0) { - poll_chars = poll_wait_key(poll_buf, pinfo); - pollp = poll_buf; - } - poll_chars--; - return *pollp++; -} - -static void cpm_put_poll_char(struct uart_port *port, - unsigned char c) -{ - struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; - static char ch[2]; - - ch[0] = (char)c; - cpm_uart_early_write(pinfo, ch, 1); -} -#endif /* CONFIG_CONSOLE_POLL */ - -static struct uart_ops cpm_uart_pops = { - .tx_empty = cpm_uart_tx_empty, - .set_mctrl = cpm_uart_set_mctrl, - .get_mctrl = cpm_uart_get_mctrl, - .stop_tx = cpm_uart_stop_tx, - .start_tx = cpm_uart_start_tx, - .stop_rx = cpm_uart_stop_rx, - .enable_ms = cpm_uart_enable_ms, - .break_ctl = cpm_uart_break_ctl, - .startup = cpm_uart_startup, - .shutdown = cpm_uart_shutdown, - .set_termios = cpm_uart_set_termios, - .type = cpm_uart_type, - .release_port = cpm_uart_release_port, - .request_port = cpm_uart_request_port, - .config_port = cpm_uart_config_port, - .verify_port = cpm_uart_verify_port, -#ifdef CONFIG_CONSOLE_POLL - .poll_get_char = cpm_get_poll_char, - .poll_put_char = cpm_put_poll_char, -#endif -}; - -struct uart_cpm_port cpm_uart_ports[UART_NR]; - -static int cpm_uart_init_port(struct device_node *np, - struct uart_cpm_port *pinfo) -{ - const u32 *data; - void __iomem *mem, *pram; - int len; - int ret; - int i; - - data = of_get_property(np, "clock", NULL); - if (data) { - struct clk *clk = clk_get(NULL, (const char*)data); - if (!IS_ERR(clk)) - pinfo->clk = clk; - } - if (!pinfo->clk) { - data = of_get_property(np, "fsl,cpm-brg", &len); - if (!data || len != 4) { - printk(KERN_ERR "CPM UART %s has no/invalid " - "fsl,cpm-brg property.\n", np->name); - return -EINVAL; - } - pinfo->brg = *data; - } - - data = of_get_property(np, "fsl,cpm-command", &len); - if (!data || len != 4) { - printk(KERN_ERR "CPM UART %s has no/invalid " - "fsl,cpm-command property.\n", np->name); - return -EINVAL; - } - pinfo->command = *data; - - mem = of_iomap(np, 0); - if (!mem) - return -ENOMEM; - - if (of_device_is_compatible(np, "fsl,cpm1-scc-uart") || - of_device_is_compatible(np, "fsl,cpm2-scc-uart")) { - pinfo->sccp = mem; - pinfo->sccup = pram = cpm_uart_map_pram(pinfo, np); - } else if (of_device_is_compatible(np, "fsl,cpm1-smc-uart") || - of_device_is_compatible(np, "fsl,cpm2-smc-uart")) { - pinfo->flags |= FLAG_SMC; - pinfo->smcp = mem; - pinfo->smcup = pram = cpm_uart_map_pram(pinfo, np); - } else { - ret = -ENODEV; - goto out_mem; - } - - if (!pram) { - ret = -ENOMEM; - goto out_mem; - } - - pinfo->tx_nrfifos = TX_NUM_FIFO; - pinfo->tx_fifosize = TX_BUF_SIZE; - pinfo->rx_nrfifos = RX_NUM_FIFO; - pinfo->rx_fifosize = RX_BUF_SIZE; - - pinfo->port.uartclk = ppc_proc_freq; - pinfo->port.mapbase = (unsigned long)mem; - pinfo->port.type = PORT_CPM; - pinfo->port.ops = &cpm_uart_pops, - pinfo->port.iotype = UPIO_MEM; - pinfo->port.fifosize = pinfo->tx_nrfifos * pinfo->tx_fifosize; - spin_lock_init(&pinfo->port.lock); - - pinfo->port.irq = of_irq_to_resource(np, 0, NULL); - if (pinfo->port.irq == NO_IRQ) { - ret = -EINVAL; - goto out_pram; - } - - for (i = 0; i < NUM_GPIOS; i++) - pinfo->gpios[i] = of_get_gpio(np, i); - -#ifdef CONFIG_PPC_EARLY_DEBUG_CPM - udbg_putc = NULL; -#endif - - return cpm_uart_request_port(&pinfo->port); - -out_pram: - cpm_uart_unmap_pram(pinfo, pram); -out_mem: - iounmap(mem); - return ret; -} - -#ifdef CONFIG_SERIAL_CPM_CONSOLE -/* - * Print a string to the serial port trying not to disturb - * any possible real use of the port... - * - * Note that this is called with interrupts already disabled - */ -static void cpm_uart_console_write(struct console *co, const char *s, - u_int count) -{ - struct uart_cpm_port *pinfo = &cpm_uart_ports[co->index]; - unsigned long flags; - int nolock = oops_in_progress; - - if (unlikely(nolock)) { - local_irq_save(flags); - } else { - spin_lock_irqsave(&pinfo->port.lock, flags); - } - - cpm_uart_early_write(pinfo, s, count); - - if (unlikely(nolock)) { - local_irq_restore(flags); - } else { - spin_unlock_irqrestore(&pinfo->port.lock, flags); - } -} - - -static int __init cpm_uart_console_setup(struct console *co, char *options) -{ - int baud = 38400; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - int ret; - struct uart_cpm_port *pinfo; - struct uart_port *port; - - struct device_node *np = NULL; - int i = 0; - - if (co->index >= UART_NR) { - printk(KERN_ERR "cpm_uart: console index %d too high\n", - co->index); - return -ENODEV; - } - - do { - np = of_find_node_by_type(np, "serial"); - if (!np) - return -ENODEV; - - if (!of_device_is_compatible(np, "fsl,cpm1-smc-uart") && - !of_device_is_compatible(np, "fsl,cpm1-scc-uart") && - !of_device_is_compatible(np, "fsl,cpm2-smc-uart") && - !of_device_is_compatible(np, "fsl,cpm2-scc-uart")) - i--; - } while (i++ != co->index); - - pinfo = &cpm_uart_ports[co->index]; - - pinfo->flags |= FLAG_CONSOLE; - port = &pinfo->port; - - ret = cpm_uart_init_port(np, pinfo); - of_node_put(np); - if (ret) - return ret; - - if (options) { - uart_parse_options(options, &baud, &parity, &bits, &flow); - } else { - if ((baud = uart_baudrate()) == -1) - baud = 9600; - } - - if (IS_SMC(pinfo)) { - out_be16(&pinfo->smcup->smc_brkcr, 0); - cpm_line_cr_cmd(pinfo, CPM_CR_STOP_TX); - clrbits8(&pinfo->smcp->smc_smcm, SMCM_RX | SMCM_TX); - clrbits16(&pinfo->smcp->smc_smcmr, SMCMR_REN | SMCMR_TEN); - } else { - out_be16(&pinfo->sccup->scc_brkcr, 0); - cpm_line_cr_cmd(pinfo, CPM_CR_GRA_STOP_TX); - clrbits16(&pinfo->sccp->scc_sccm, UART_SCCM_TX | UART_SCCM_RX); - clrbits32(&pinfo->sccp->scc_gsmrl, SCC_GSMRL_ENR | SCC_GSMRL_ENT); - } - - ret = cpm_uart_allocbuf(pinfo, 1); - - if (ret) - return ret; - - cpm_uart_initbd(pinfo); - - if (IS_SMC(pinfo)) - cpm_uart_init_smc(pinfo); - else - cpm_uart_init_scc(pinfo); - - uart_set_options(port, co, baud, parity, bits, flow); - cpm_line_cr_cmd(pinfo, CPM_CR_RESTART_TX); - - return 0; -} - -static struct uart_driver cpm_reg; -static struct console cpm_scc_uart_console = { - .name = "ttyCPM", - .write = cpm_uart_console_write, - .device = uart_console_device, - .setup = cpm_uart_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &cpm_reg, -}; - -static int __init cpm_uart_console_init(void) -{ - register_console(&cpm_scc_uart_console); - return 0; -} - -console_initcall(cpm_uart_console_init); - -#define CPM_UART_CONSOLE &cpm_scc_uart_console -#else -#define CPM_UART_CONSOLE NULL -#endif - -static struct uart_driver cpm_reg = { - .owner = THIS_MODULE, - .driver_name = "ttyCPM", - .dev_name = "ttyCPM", - .major = SERIAL_CPM_MAJOR, - .minor = SERIAL_CPM_MINOR, - .cons = CPM_UART_CONSOLE, - .nr = UART_NR, -}; - -static int probe_index; - -static int __devinit cpm_uart_probe(struct platform_device *ofdev, - const struct of_device_id *match) -{ - int index = probe_index++; - struct uart_cpm_port *pinfo = &cpm_uart_ports[index]; - int ret; - - pinfo->port.line = index; - - if (index >= UART_NR) - return -ENODEV; - - dev_set_drvdata(&ofdev->dev, pinfo); - - /* initialize the device pointer for the port */ - pinfo->port.dev = &ofdev->dev; - - ret = cpm_uart_init_port(ofdev->dev.of_node, pinfo); - if (ret) - return ret; - - return uart_add_one_port(&cpm_reg, &pinfo->port); -} - -static int __devexit cpm_uart_remove(struct platform_device *ofdev) -{ - struct uart_cpm_port *pinfo = dev_get_drvdata(&ofdev->dev); - return uart_remove_one_port(&cpm_reg, &pinfo->port); -} - -static struct of_device_id cpm_uart_match[] = { - { - .compatible = "fsl,cpm1-smc-uart", - }, - { - .compatible = "fsl,cpm1-scc-uart", - }, - { - .compatible = "fsl,cpm2-smc-uart", - }, - { - .compatible = "fsl,cpm2-scc-uart", - }, - {} -}; - -static struct of_platform_driver cpm_uart_driver = { - .driver = { - .name = "cpm_uart", - .owner = THIS_MODULE, - .of_match_table = cpm_uart_match, - }, - .probe = cpm_uart_probe, - .remove = cpm_uart_remove, - }; - -static int __init cpm_uart_init(void) -{ - int ret = uart_register_driver(&cpm_reg); - if (ret) - return ret; - - ret = of_register_platform_driver(&cpm_uart_driver); - if (ret) - uart_unregister_driver(&cpm_reg); - - return ret; -} - -static void __exit cpm_uart_exit(void) -{ - of_unregister_platform_driver(&cpm_uart_driver); - uart_unregister_driver(&cpm_reg); -} - -module_init(cpm_uart_init); -module_exit(cpm_uart_exit); - -MODULE_AUTHOR("Kumar Gala/Antoniou Pantelis"); -MODULE_DESCRIPTION("CPM SCC/SMC port driver $Revision: 0.01 $"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_CHARDEV(SERIAL_CPM_MAJOR, SERIAL_CPM_MINOR); diff --git a/drivers/serial/cpm_uart/cpm_uart_cpm1.c b/drivers/serial/cpm_uart/cpm_uart_cpm1.c deleted file mode 100644 index 3fc1d66e32c6..000000000000 --- a/drivers/serial/cpm_uart/cpm_uart_cpm1.c +++ /dev/null @@ -1,138 +0,0 @@ -/* - * linux/drivers/serial/cpm_uart.c - * - * Driver for CPM (SCC/SMC) serial ports; CPM1 definitions - * - * Maintainer: Kumar Gala (galak@kernel.crashing.org) (CPM2) - * Pantelis Antoniou (panto@intracom.gr) (CPM1) - * - * Copyright (C) 2004 Freescale Semiconductor, Inc. - * (C) 2004 Intracom, S.A. - * (C) 2006 MontaVista Software, Inc. - * Vitaly Bordug <vbordug@ru.mvista.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ - -#include <linux/module.h> -#include <linux/tty.h> -#include <linux/gfp.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/serial.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/device.h> -#include <linux/bootmem.h> -#include <linux/dma-mapping.h> - -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/fs_pd.h> - -#include <linux/serial_core.h> -#include <linux/kernel.h> - -#include <linux/of.h> - -#include "cpm_uart.h" - -/**************************************************************/ - -void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd) -{ - cpm_command(port->command, cmd); -} - -void __iomem *cpm_uart_map_pram(struct uart_cpm_port *port, - struct device_node *np) -{ - return of_iomap(np, 1); -} - -void cpm_uart_unmap_pram(struct uart_cpm_port *port, void __iomem *pram) -{ - iounmap(pram); -} - -/* - * Allocate DP-Ram and memory buffers. We need to allocate a transmit and - * receive buffer descriptors from dual port ram, and a character - * buffer area from host mem. If we are allocating for the console we need - * to do it from bootmem - */ -int cpm_uart_allocbuf(struct uart_cpm_port *pinfo, unsigned int is_con) -{ - int dpmemsz, memsz; - u8 *dp_mem; - unsigned long dp_offset; - u8 *mem_addr; - dma_addr_t dma_addr = 0; - - pr_debug("CPM uart[%d]:allocbuf\n", pinfo->port.line); - - dpmemsz = sizeof(cbd_t) * (pinfo->rx_nrfifos + pinfo->tx_nrfifos); - dp_offset = cpm_dpalloc(dpmemsz, 8); - if (IS_ERR_VALUE(dp_offset)) { - printk(KERN_ERR - "cpm_uart_cpm1.c: could not allocate buffer descriptors\n"); - return -ENOMEM; - } - dp_mem = cpm_dpram_addr(dp_offset); - - memsz = L1_CACHE_ALIGN(pinfo->rx_nrfifos * pinfo->rx_fifosize) + - L1_CACHE_ALIGN(pinfo->tx_nrfifos * pinfo->tx_fifosize); - if (is_con) { - /* was hostalloc but changed cause it blows away the */ - /* large tlb mapping when pinning the kernel area */ - mem_addr = (u8 *) cpm_dpram_addr(cpm_dpalloc(memsz, 8)); - dma_addr = (u32)cpm_dpram_phys(mem_addr); - } else - mem_addr = dma_alloc_coherent(pinfo->port.dev, memsz, &dma_addr, - GFP_KERNEL); - - if (mem_addr == NULL) { - cpm_dpfree(dp_offset); - printk(KERN_ERR - "cpm_uart_cpm1.c: could not allocate coherent memory\n"); - return -ENOMEM; - } - - pinfo->dp_addr = dp_offset; - pinfo->mem_addr = mem_addr; /* virtual address*/ - pinfo->dma_addr = dma_addr; /* physical address*/ - pinfo->mem_size = memsz; - - pinfo->rx_buf = mem_addr; - pinfo->tx_buf = pinfo->rx_buf + L1_CACHE_ALIGN(pinfo->rx_nrfifos - * pinfo->rx_fifosize); - - pinfo->rx_bd_base = (cbd_t __iomem __force *)dp_mem; - pinfo->tx_bd_base = pinfo->rx_bd_base + pinfo->rx_nrfifos; - - return 0; -} - -void cpm_uart_freebuf(struct uart_cpm_port *pinfo) -{ - dma_free_coherent(pinfo->port.dev, L1_CACHE_ALIGN(pinfo->rx_nrfifos * - pinfo->rx_fifosize) + - L1_CACHE_ALIGN(pinfo->tx_nrfifos * - pinfo->tx_fifosize), pinfo->mem_addr, - pinfo->dma_addr); - - cpm_dpfree(pinfo->dp_addr); -} diff --git a/drivers/serial/cpm_uart/cpm_uart_cpm1.h b/drivers/serial/cpm_uart/cpm_uart_cpm1.h deleted file mode 100644 index 10eecd6af6d4..000000000000 --- a/drivers/serial/cpm_uart/cpm_uart_cpm1.h +++ /dev/null @@ -1,34 +0,0 @@ -/* - * linux/drivers/serial/cpm_uart/cpm_uart_cpm1.h - * - * Driver for CPM (SCC/SMC) serial ports - * - * definitions for cpm1 - * - */ - -#ifndef CPM_UART_CPM1_H -#define CPM_UART_CPM1_H - -#include <asm/cpm1.h> - -static inline void cpm_set_brg(int brg, int baud) -{ - cpm_setbrg(brg, baud); -} - -static inline void cpm_set_scc_fcr(scc_uart_t __iomem * sup) -{ - out_8(&sup->scc_genscc.scc_rfcr, SMC_EB); - out_8(&sup->scc_genscc.scc_tfcr, SMC_EB); -} - -static inline void cpm_set_smc_fcr(smc_uart_t __iomem * up) -{ - out_8(&up->smc_rfcr, SMC_EB); - out_8(&up->smc_tfcr, SMC_EB); -} - -#define DPRAM_BASE ((u8 __iomem __force *)cpm_dpram_addr(0)) - -#endif diff --git a/drivers/serial/cpm_uart/cpm_uart_cpm2.c b/drivers/serial/cpm_uart/cpm_uart_cpm2.c deleted file mode 100644 index 814ac006393f..000000000000 --- a/drivers/serial/cpm_uart/cpm_uart_cpm2.c +++ /dev/null @@ -1,174 +0,0 @@ -/* - * linux/drivers/serial/cpm_uart_cpm2.c - * - * Driver for CPM (SCC/SMC) serial ports; CPM2 definitions - * - * Maintainer: Kumar Gala (galak@kernel.crashing.org) (CPM2) - * Pantelis Antoniou (panto@intracom.gr) (CPM1) - * - * Copyright (C) 2004 Freescale Semiconductor, Inc. - * (C) 2004 Intracom, S.A. - * (C) 2006 MontaVista Software, Inc. - * Vitaly Bordug <vbordug@ru.mvista.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ - -#include <linux/module.h> -#include <linux/tty.h> -#include <linux/ioport.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/serial.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/device.h> -#include <linux/bootmem.h> -#include <linux/dma-mapping.h> - -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/fs_pd.h> -#include <asm/prom.h> - -#include <linux/serial_core.h> -#include <linux/kernel.h> - -#include "cpm_uart.h" - -/**************************************************************/ - -void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd) -{ - cpm_command(port->command, cmd); -} - -void __iomem *cpm_uart_map_pram(struct uart_cpm_port *port, - struct device_node *np) -{ - void __iomem *pram; - unsigned long offset; - struct resource res; - resource_size_t len; - - /* Don't remap parameter RAM if it has already been initialized - * during console setup. - */ - if (IS_SMC(port) && port->smcup) - return port->smcup; - else if (!IS_SMC(port) && port->sccup) - return port->sccup; - - if (of_address_to_resource(np, 1, &res)) - return NULL; - - len = resource_size(&res); - pram = ioremap(res.start, len); - if (!pram) - return NULL; - - if (!IS_SMC(port)) - return pram; - - if (len != 2) { - printk(KERN_WARNING "cpm_uart[%d]: device tree references " - "SMC pram, using boot loader/wrapper pram mapping. " - "Please fix your device tree to reference the pram " - "base register instead.\n", - port->port.line); - return pram; - } - - offset = cpm_dpalloc(PROFF_SMC_SIZE, 64); - out_be16(pram, offset); - iounmap(pram); - return cpm_muram_addr(offset); -} - -void cpm_uart_unmap_pram(struct uart_cpm_port *port, void __iomem *pram) -{ - if (!IS_SMC(port)) - iounmap(pram); -} - -/* - * Allocate DP-Ram and memory buffers. We need to allocate a transmit and - * receive buffer descriptors from dual port ram, and a character - * buffer area from host mem. If we are allocating for the console we need - * to do it from bootmem - */ -int cpm_uart_allocbuf(struct uart_cpm_port *pinfo, unsigned int is_con) -{ - int dpmemsz, memsz; - u8 __iomem *dp_mem; - unsigned long dp_offset; - u8 *mem_addr; - dma_addr_t dma_addr = 0; - - pr_debug("CPM uart[%d]:allocbuf\n", pinfo->port.line); - - dpmemsz = sizeof(cbd_t) * (pinfo->rx_nrfifos + pinfo->tx_nrfifos); - dp_offset = cpm_dpalloc(dpmemsz, 8); - if (IS_ERR_VALUE(dp_offset)) { - printk(KERN_ERR - "cpm_uart_cpm.c: could not allocate buffer descriptors\n"); - return -ENOMEM; - } - - dp_mem = cpm_dpram_addr(dp_offset); - - memsz = L1_CACHE_ALIGN(pinfo->rx_nrfifos * pinfo->rx_fifosize) + - L1_CACHE_ALIGN(pinfo->tx_nrfifos * pinfo->tx_fifosize); - if (is_con) { - mem_addr = kzalloc(memsz, GFP_NOWAIT); - dma_addr = virt_to_bus(mem_addr); - } - else - mem_addr = dma_alloc_coherent(pinfo->port.dev, memsz, &dma_addr, - GFP_KERNEL); - - if (mem_addr == NULL) { - cpm_dpfree(dp_offset); - printk(KERN_ERR - "cpm_uart_cpm.c: could not allocate coherent memory\n"); - return -ENOMEM; - } - - pinfo->dp_addr = dp_offset; - pinfo->mem_addr = mem_addr; - pinfo->dma_addr = dma_addr; - pinfo->mem_size = memsz; - - pinfo->rx_buf = mem_addr; - pinfo->tx_buf = pinfo->rx_buf + L1_CACHE_ALIGN(pinfo->rx_nrfifos - * pinfo->rx_fifosize); - - pinfo->rx_bd_base = (cbd_t __iomem *)dp_mem; - pinfo->tx_bd_base = pinfo->rx_bd_base + pinfo->rx_nrfifos; - - return 0; -} - -void cpm_uart_freebuf(struct uart_cpm_port *pinfo) -{ - dma_free_coherent(pinfo->port.dev, L1_CACHE_ALIGN(pinfo->rx_nrfifos * - pinfo->rx_fifosize) + - L1_CACHE_ALIGN(pinfo->tx_nrfifos * - pinfo->tx_fifosize), (void __force *)pinfo->mem_addr, - pinfo->dma_addr); - - cpm_dpfree(pinfo->dp_addr); -} diff --git a/drivers/serial/cpm_uart/cpm_uart_cpm2.h b/drivers/serial/cpm_uart/cpm_uart_cpm2.h deleted file mode 100644 index 7194c63dcf5f..000000000000 --- a/drivers/serial/cpm_uart/cpm_uart_cpm2.h +++ /dev/null @@ -1,34 +0,0 @@ -/* - * linux/drivers/serial/cpm_uart/cpm_uart_cpm2.h - * - * Driver for CPM (SCC/SMC) serial ports - * - * definitions for cpm2 - * - */ - -#ifndef CPM_UART_CPM2_H -#define CPM_UART_CPM2_H - -#include <asm/cpm2.h> - -static inline void cpm_set_brg(int brg, int baud) -{ - cpm_setbrg(brg, baud); -} - -static inline void cpm_set_scc_fcr(scc_uart_t __iomem *sup) -{ - out_8(&sup->scc_genscc.scc_rfcr, CPMFCR_GBL | CPMFCR_EB); - out_8(&sup->scc_genscc.scc_tfcr, CPMFCR_GBL | CPMFCR_EB); -} - -static inline void cpm_set_smc_fcr(smc_uart_t __iomem *up) -{ - out_8(&up->smc_rfcr, CPMFCR_GBL | CPMFCR_EB); - out_8(&up->smc_tfcr, CPMFCR_GBL | CPMFCR_EB); -} - -#define DPRAM_BASE ((u8 __iomem __force *)cpm_dpram_addr(0)) - -#endif diff --git a/drivers/serial/crisv10.c b/drivers/serial/crisv10.c deleted file mode 100644 index bcc31f2140ac..000000000000 --- a/drivers/serial/crisv10.c +++ /dev/null @@ -1,4573 +0,0 @@ -/* - * Serial port driver for the ETRAX 100LX chip - * - * Copyright (C) 1998-2007 Axis Communications AB - * - * Many, many authors. Based once upon a time on serial.c for 16x50. - * - */ - -static char *serial_version = "$Revision: 1.25 $"; - -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/signal.h> -#include <linux/sched.h> -#include <linux/timer.h> -#include <linux/interrupt.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/major.h> -#include <linux/string.h> -#include <linux/fcntl.h> -#include <linux/mm.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/mutex.h> -#include <linux/bitops.h> -#include <linux/seq_file.h> -#include <linux/delay.h> -#include <linux/module.h> -#include <linux/uaccess.h> -#include <linux/io.h> - -#include <asm/irq.h> -#include <asm/dma.h> -#include <asm/system.h> - -#include <arch/svinto.h> - -/* non-arch dependent serial structures are in linux/serial.h */ -#include <linux/serial.h> -/* while we keep our own stuff (struct e100_serial) in a local .h file */ -#include "crisv10.h" -#include <asm/fasttimer.h> -#include <arch/io_interface_mux.h> - -#ifdef CONFIG_ETRAX_SERIAL_FAST_TIMER -#ifndef CONFIG_ETRAX_FAST_TIMER -#error "Enable FAST_TIMER to use SERIAL_FAST_TIMER" -#endif -#endif - -#if defined(CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS) && \ - (CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS == 0) -#error "RX_TIMEOUT_TICKS == 0 not allowed, use 1" -#endif - -#if defined(CONFIG_ETRAX_RS485_ON_PA) && defined(CONFIG_ETRAX_RS485_ON_PORT_G) -#error "Disable either CONFIG_ETRAX_RS485_ON_PA or CONFIG_ETRAX_RS485_ON_PORT_G" -#endif - -/* - * All of the compatibilty code so we can compile serial.c against - * older kernels is hidden in serial_compat.h - */ -#if defined(LOCAL_HEADERS) -#include "serial_compat.h" -#endif - -struct tty_driver *serial_driver; - -/* number of characters left in xmit buffer before we ask for more */ -#define WAKEUP_CHARS 256 - -//#define SERIAL_DEBUG_INTR -//#define SERIAL_DEBUG_OPEN -//#define SERIAL_DEBUG_FLOW -//#define SERIAL_DEBUG_DATA -//#define SERIAL_DEBUG_THROTTLE -//#define SERIAL_DEBUG_IO /* Debug for Extra control and status pins */ -//#define SERIAL_DEBUG_LINE 0 /* What serport we want to debug */ - -/* Enable this to use serial interrupts to handle when you - expect the first received event on the serial port to - be an error, break or similar. Used to be able to flash IRMA - from eLinux */ -#define SERIAL_HANDLE_EARLY_ERRORS - -/* Currently 16 descriptors x 128 bytes = 2048 bytes */ -#define SERIAL_DESCR_BUF_SIZE 256 - -#define SERIAL_PRESCALE_BASE 3125000 /* 3.125MHz */ -#define DEF_BAUD_BASE SERIAL_PRESCALE_BASE - -/* We don't want to load the system with massive fast timer interrupt - * on high baudrates so limit it to 250 us (4kHz) */ -#define MIN_FLUSH_TIME_USEC 250 - -/* Add an x here to log a lot of timer stuff */ -#define TIMERD(x) -/* Debug details of interrupt handling */ -#define DINTR1(x) /* irq on/off, errors */ -#define DINTR2(x) /* tx and rx */ -/* Debug flip buffer stuff */ -#define DFLIP(x) -/* Debug flow control and overview of data flow */ -#define DFLOW(x) -#define DBAUD(x) -#define DLOG_INT_TRIG(x) - -//#define DEBUG_LOG_INCLUDED -#ifndef DEBUG_LOG_INCLUDED -#define DEBUG_LOG(line, string, value) -#else -struct debug_log_info -{ - unsigned long time; - unsigned long timer_data; -// int line; - const char *string; - int value; -}; -#define DEBUG_LOG_SIZE 4096 - -struct debug_log_info debug_log[DEBUG_LOG_SIZE]; -int debug_log_pos = 0; - -#define DEBUG_LOG(_line, _string, _value) do { \ - if ((_line) == SERIAL_DEBUG_LINE) {\ - debug_log_func(_line, _string, _value); \ - }\ -}while(0) - -void debug_log_func(int line, const char *string, int value) -{ - if (debug_log_pos < DEBUG_LOG_SIZE) { - debug_log[debug_log_pos].time = jiffies; - debug_log[debug_log_pos].timer_data = *R_TIMER_DATA; -// debug_log[debug_log_pos].line = line; - debug_log[debug_log_pos].string = string; - debug_log[debug_log_pos].value = value; - debug_log_pos++; - } - /*printk(string, value);*/ -} -#endif - -#ifndef CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS -/* Default number of timer ticks before flushing rx fifo - * When using "little data, low latency applications: use 0 - * When using "much data applications (PPP)" use ~5 - */ -#define CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS 5 -#endif - -unsigned long timer_data_to_ns(unsigned long timer_data); - -static void change_speed(struct e100_serial *info); -static void rs_throttle(struct tty_struct * tty); -static void rs_wait_until_sent(struct tty_struct *tty, int timeout); -static int rs_write(struct tty_struct *tty, - const unsigned char *buf, int count); -#ifdef CONFIG_ETRAX_RS485 -static int e100_write_rs485(struct tty_struct *tty, - const unsigned char *buf, int count); -#endif -static int get_lsr_info(struct e100_serial *info, unsigned int *value); - - -#define DEF_BAUD 115200 /* 115.2 kbit/s */ -#define STD_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST) -#define DEF_RX 0x20 /* or SERIAL_CTRL_W >> 8 */ -/* Default value of tx_ctrl register: has txd(bit 7)=1 (idle) as default */ -#define DEF_TX 0x80 /* or SERIAL_CTRL_B */ - -/* offsets from R_SERIALx_CTRL */ - -#define REG_DATA 0 -#define REG_DATA_STATUS32 0 /* this is the 32 bit register R_SERIALx_READ */ -#define REG_TR_DATA 0 -#define REG_STATUS 1 -#define REG_TR_CTRL 1 -#define REG_REC_CTRL 2 -#define REG_BAUD 3 -#define REG_XOFF 4 /* this is a 32 bit register */ - -/* The bitfields are the same for all serial ports */ -#define SER_RXD_MASK IO_MASK(R_SERIAL0_STATUS, rxd) -#define SER_DATA_AVAIL_MASK IO_MASK(R_SERIAL0_STATUS, data_avail) -#define SER_FRAMING_ERR_MASK IO_MASK(R_SERIAL0_STATUS, framing_err) -#define SER_PAR_ERR_MASK IO_MASK(R_SERIAL0_STATUS, par_err) -#define SER_OVERRUN_MASK IO_MASK(R_SERIAL0_STATUS, overrun) - -#define SER_ERROR_MASK (SER_OVERRUN_MASK | SER_PAR_ERR_MASK | SER_FRAMING_ERR_MASK) - -/* Values for info->errorcode */ -#define ERRCODE_SET_BREAK (TTY_BREAK) -#define ERRCODE_INSERT 0x100 -#define ERRCODE_INSERT_BREAK (ERRCODE_INSERT | TTY_BREAK) - -#define FORCE_EOP(info) *R_SET_EOP = 1U << info->iseteop; - -/* - * General note regarding the use of IO_* macros in this file: - * - * We will use the bits defined for DMA channel 6 when using various - * IO_* macros (e.g. IO_STATE, IO_MASK, IO_EXTRACT) and _assume_ they are - * the same for all channels (which of course they are). - * - * We will also use the bits defined for serial port 0 when writing commands - * to the different ports, as these bits too are the same for all ports. - */ - - -/* Mask for the irqs possibly enabled in R_IRQ_MASK1_RD etc. */ -static const unsigned long e100_ser_int_mask = 0 -#ifdef CONFIG_ETRAX_SERIAL_PORT0 -| IO_MASK(R_IRQ_MASK1_RD, ser0_data) | IO_MASK(R_IRQ_MASK1_RD, ser0_ready) -#endif -#ifdef CONFIG_ETRAX_SERIAL_PORT1 -| IO_MASK(R_IRQ_MASK1_RD, ser1_data) | IO_MASK(R_IRQ_MASK1_RD, ser1_ready) -#endif -#ifdef CONFIG_ETRAX_SERIAL_PORT2 -| IO_MASK(R_IRQ_MASK1_RD, ser2_data) | IO_MASK(R_IRQ_MASK1_RD, ser2_ready) -#endif -#ifdef CONFIG_ETRAX_SERIAL_PORT3 -| IO_MASK(R_IRQ_MASK1_RD, ser3_data) | IO_MASK(R_IRQ_MASK1_RD, ser3_ready) -#endif -; -unsigned long r_alt_ser_baudrate_shadow = 0; - -/* this is the data for the four serial ports in the etrax100 */ -/* DMA2(ser2), DMA4(ser3), DMA6(ser0) or DMA8(ser1) */ -/* R_DMA_CHx_CLR_INTR, R_DMA_CHx_FIRST, R_DMA_CHx_CMD */ - -static struct e100_serial rs_table[] = { - { .baud = DEF_BAUD, - .ioport = (unsigned char *)R_SERIAL0_CTRL, - .irq = 1U << 12, /* uses DMA 6 and 7 */ - .oclrintradr = R_DMA_CH6_CLR_INTR, - .ofirstadr = R_DMA_CH6_FIRST, - .ocmdadr = R_DMA_CH6_CMD, - .ostatusadr = R_DMA_CH6_STATUS, - .iclrintradr = R_DMA_CH7_CLR_INTR, - .ifirstadr = R_DMA_CH7_FIRST, - .icmdadr = R_DMA_CH7_CMD, - .idescradr = R_DMA_CH7_DESCR, - .flags = STD_FLAGS, - .rx_ctrl = DEF_RX, - .tx_ctrl = DEF_TX, - .iseteop = 2, - .dma_owner = dma_ser0, - .io_if = if_serial_0, -#ifdef CONFIG_ETRAX_SERIAL_PORT0 - .enabled = 1, -#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA6_OUT - .dma_out_enabled = 1, - .dma_out_nbr = SER0_TX_DMA_NBR, - .dma_out_irq_nbr = SER0_DMA_TX_IRQ_NBR, - .dma_out_irq_flags = IRQF_DISABLED, - .dma_out_irq_description = "serial 0 dma tr", -#else - .dma_out_enabled = 0, - .dma_out_nbr = UINT_MAX, - .dma_out_irq_nbr = 0, - .dma_out_irq_flags = 0, - .dma_out_irq_description = NULL, -#endif -#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA7_IN - .dma_in_enabled = 1, - .dma_in_nbr = SER0_RX_DMA_NBR, - .dma_in_irq_nbr = SER0_DMA_RX_IRQ_NBR, - .dma_in_irq_flags = IRQF_DISABLED, - .dma_in_irq_description = "serial 0 dma rec", -#else - .dma_in_enabled = 0, - .dma_in_nbr = UINT_MAX, - .dma_in_irq_nbr = 0, - .dma_in_irq_flags = 0, - .dma_in_irq_description = NULL, -#endif -#else - .enabled = 0, - .io_if_description = NULL, - .dma_out_enabled = 0, - .dma_in_enabled = 0 -#endif - -}, /* ttyS0 */ -#ifndef CONFIG_SVINTO_SIM - { .baud = DEF_BAUD, - .ioport = (unsigned char *)R_SERIAL1_CTRL, - .irq = 1U << 16, /* uses DMA 8 and 9 */ - .oclrintradr = R_DMA_CH8_CLR_INTR, - .ofirstadr = R_DMA_CH8_FIRST, - .ocmdadr = R_DMA_CH8_CMD, - .ostatusadr = R_DMA_CH8_STATUS, - .iclrintradr = R_DMA_CH9_CLR_INTR, - .ifirstadr = R_DMA_CH9_FIRST, - .icmdadr = R_DMA_CH9_CMD, - .idescradr = R_DMA_CH9_DESCR, - .flags = STD_FLAGS, - .rx_ctrl = DEF_RX, - .tx_ctrl = DEF_TX, - .iseteop = 3, - .dma_owner = dma_ser1, - .io_if = if_serial_1, -#ifdef CONFIG_ETRAX_SERIAL_PORT1 - .enabled = 1, - .io_if_description = "ser1", -#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA8_OUT - .dma_out_enabled = 1, - .dma_out_nbr = SER1_TX_DMA_NBR, - .dma_out_irq_nbr = SER1_DMA_TX_IRQ_NBR, - .dma_out_irq_flags = IRQF_DISABLED, - .dma_out_irq_description = "serial 1 dma tr", -#else - .dma_out_enabled = 0, - .dma_out_nbr = UINT_MAX, - .dma_out_irq_nbr = 0, - .dma_out_irq_flags = 0, - .dma_out_irq_description = NULL, -#endif -#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA9_IN - .dma_in_enabled = 1, - .dma_in_nbr = SER1_RX_DMA_NBR, - .dma_in_irq_nbr = SER1_DMA_RX_IRQ_NBR, - .dma_in_irq_flags = IRQF_DISABLED, - .dma_in_irq_description = "serial 1 dma rec", -#else - .dma_in_enabled = 0, - .dma_in_enabled = 0, - .dma_in_nbr = UINT_MAX, - .dma_in_irq_nbr = 0, - .dma_in_irq_flags = 0, - .dma_in_irq_description = NULL, -#endif -#else - .enabled = 0, - .io_if_description = NULL, - .dma_in_irq_nbr = 0, - .dma_out_enabled = 0, - .dma_in_enabled = 0 -#endif -}, /* ttyS1 */ - - { .baud = DEF_BAUD, - .ioport = (unsigned char *)R_SERIAL2_CTRL, - .irq = 1U << 4, /* uses DMA 2 and 3 */ - .oclrintradr = R_DMA_CH2_CLR_INTR, - .ofirstadr = R_DMA_CH2_FIRST, - .ocmdadr = R_DMA_CH2_CMD, - .ostatusadr = R_DMA_CH2_STATUS, - .iclrintradr = R_DMA_CH3_CLR_INTR, - .ifirstadr = R_DMA_CH3_FIRST, - .icmdadr = R_DMA_CH3_CMD, - .idescradr = R_DMA_CH3_DESCR, - .flags = STD_FLAGS, - .rx_ctrl = DEF_RX, - .tx_ctrl = DEF_TX, - .iseteop = 0, - .dma_owner = dma_ser2, - .io_if = if_serial_2, -#ifdef CONFIG_ETRAX_SERIAL_PORT2 - .enabled = 1, - .io_if_description = "ser2", -#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA2_OUT - .dma_out_enabled = 1, - .dma_out_nbr = SER2_TX_DMA_NBR, - .dma_out_irq_nbr = SER2_DMA_TX_IRQ_NBR, - .dma_out_irq_flags = IRQF_DISABLED, - .dma_out_irq_description = "serial 2 dma tr", -#else - .dma_out_enabled = 0, - .dma_out_nbr = UINT_MAX, - .dma_out_irq_nbr = 0, - .dma_out_irq_flags = 0, - .dma_out_irq_description = NULL, -#endif -#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA3_IN - .dma_in_enabled = 1, - .dma_in_nbr = SER2_RX_DMA_NBR, - .dma_in_irq_nbr = SER2_DMA_RX_IRQ_NBR, - .dma_in_irq_flags = IRQF_DISABLED, - .dma_in_irq_description = "serial 2 dma rec", -#else - .dma_in_enabled = 0, - .dma_in_nbr = UINT_MAX, - .dma_in_irq_nbr = 0, - .dma_in_irq_flags = 0, - .dma_in_irq_description = NULL, -#endif -#else - .enabled = 0, - .io_if_description = NULL, - .dma_out_enabled = 0, - .dma_in_enabled = 0 -#endif - }, /* ttyS2 */ - - { .baud = DEF_BAUD, - .ioport = (unsigned char *)R_SERIAL3_CTRL, - .irq = 1U << 8, /* uses DMA 4 and 5 */ - .oclrintradr = R_DMA_CH4_CLR_INTR, - .ofirstadr = R_DMA_CH4_FIRST, - .ocmdadr = R_DMA_CH4_CMD, - .ostatusadr = R_DMA_CH4_STATUS, - .iclrintradr = R_DMA_CH5_CLR_INTR, - .ifirstadr = R_DMA_CH5_FIRST, - .icmdadr = R_DMA_CH5_CMD, - .idescradr = R_DMA_CH5_DESCR, - .flags = STD_FLAGS, - .rx_ctrl = DEF_RX, - .tx_ctrl = DEF_TX, - .iseteop = 1, - .dma_owner = dma_ser3, - .io_if = if_serial_3, -#ifdef CONFIG_ETRAX_SERIAL_PORT3 - .enabled = 1, - .io_if_description = "ser3", -#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA4_OUT - .dma_out_enabled = 1, - .dma_out_nbr = SER3_TX_DMA_NBR, - .dma_out_irq_nbr = SER3_DMA_TX_IRQ_NBR, - .dma_out_irq_flags = IRQF_DISABLED, - .dma_out_irq_description = "serial 3 dma tr", -#else - .dma_out_enabled = 0, - .dma_out_nbr = UINT_MAX, - .dma_out_irq_nbr = 0, - .dma_out_irq_flags = 0, - .dma_out_irq_description = NULL, -#endif -#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA5_IN - .dma_in_enabled = 1, - .dma_in_nbr = SER3_RX_DMA_NBR, - .dma_in_irq_nbr = SER3_DMA_RX_IRQ_NBR, - .dma_in_irq_flags = IRQF_DISABLED, - .dma_in_irq_description = "serial 3 dma rec", -#else - .dma_in_enabled = 0, - .dma_in_nbr = UINT_MAX, - .dma_in_irq_nbr = 0, - .dma_in_irq_flags = 0, - .dma_in_irq_description = NULL -#endif -#else - .enabled = 0, - .io_if_description = NULL, - .dma_out_enabled = 0, - .dma_in_enabled = 0 -#endif - } /* ttyS3 */ -#endif -}; - - -#define NR_PORTS (sizeof(rs_table)/sizeof(struct e100_serial)) - -#ifdef CONFIG_ETRAX_SERIAL_FAST_TIMER -static struct fast_timer fast_timers[NR_PORTS]; -#endif - -#ifdef CONFIG_ETRAX_SERIAL_PROC_ENTRY -#define PROCSTAT(x) x -struct ser_statistics_type { - int overrun_cnt; - int early_errors_cnt; - int ser_ints_ok_cnt; - int errors_cnt; - unsigned long int processing_flip; - unsigned long processing_flip_still_room; - unsigned long int timeout_flush_cnt; - int rx_dma_ints; - int tx_dma_ints; - int rx_tot; - int tx_tot; -}; - -static struct ser_statistics_type ser_stat[NR_PORTS]; - -#else - -#define PROCSTAT(x) - -#endif /* CONFIG_ETRAX_SERIAL_PROC_ENTRY */ - -/* RS-485 */ -#if defined(CONFIG_ETRAX_RS485) -#ifdef CONFIG_ETRAX_FAST_TIMER -static struct fast_timer fast_timers_rs485[NR_PORTS]; -#endif -#if defined(CONFIG_ETRAX_RS485_ON_PA) -static int rs485_pa_bit = CONFIG_ETRAX_RS485_ON_PA_BIT; -#endif -#if defined(CONFIG_ETRAX_RS485_ON_PORT_G) -static int rs485_port_g_bit = CONFIG_ETRAX_RS485_ON_PORT_G_BIT; -#endif -#endif - -/* Info and macros needed for each ports extra control/status signals. */ -#define E100_STRUCT_PORT(line, pinname) \ - ((CONFIG_ETRAX_SER##line##_##pinname##_ON_PA_BIT >= 0)? \ - (R_PORT_PA_DATA): ( \ - (CONFIG_ETRAX_SER##line##_##pinname##_ON_PB_BIT >= 0)? \ - (R_PORT_PB_DATA):&dummy_ser[line])) - -#define E100_STRUCT_SHADOW(line, pinname) \ - ((CONFIG_ETRAX_SER##line##_##pinname##_ON_PA_BIT >= 0)? \ - (&port_pa_data_shadow): ( \ - (CONFIG_ETRAX_SER##line##_##pinname##_ON_PB_BIT >= 0)? \ - (&port_pb_data_shadow):&dummy_ser[line])) -#define E100_STRUCT_MASK(line, pinname) \ - ((CONFIG_ETRAX_SER##line##_##pinname##_ON_PA_BIT >= 0)? \ - (1<<CONFIG_ETRAX_SER##line##_##pinname##_ON_PA_BIT): ( \ - (CONFIG_ETRAX_SER##line##_##pinname##_ON_PB_BIT >= 0)? \ - (1<<CONFIG_ETRAX_SER##line##_##pinname##_ON_PB_BIT):DUMMY_##pinname##_MASK)) - -#define DUMMY_DTR_MASK 1 -#define DUMMY_RI_MASK 2 -#define DUMMY_DSR_MASK 4 -#define DUMMY_CD_MASK 8 -static unsigned char dummy_ser[NR_PORTS] = {0xFF, 0xFF, 0xFF,0xFF}; - -/* If not all status pins are used or disabled, use mixed mode */ -#ifdef CONFIG_ETRAX_SERIAL_PORT0 - -#define SER0_PA_BITSUM (CONFIG_ETRAX_SER0_DTR_ON_PA_BIT+CONFIG_ETRAX_SER0_RI_ON_PA_BIT+CONFIG_ETRAX_SER0_DSR_ON_PA_BIT+CONFIG_ETRAX_SER0_CD_ON_PA_BIT) - -#if SER0_PA_BITSUM != -4 -# if CONFIG_ETRAX_SER0_DTR_ON_PA_BIT == -1 -# ifndef CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER0_RI_ON_PA_BIT == -1 -# ifndef CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER0_DSR_ON_PA_BIT == -1 -# ifndef CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER0_CD_ON_PA_BIT == -1 -# ifndef CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -#endif - -#define SER0_PB_BITSUM (CONFIG_ETRAX_SER0_DTR_ON_PB_BIT+CONFIG_ETRAX_SER0_RI_ON_PB_BIT+CONFIG_ETRAX_SER0_DSR_ON_PB_BIT+CONFIG_ETRAX_SER0_CD_ON_PB_BIT) - -#if SER0_PB_BITSUM != -4 -# if CONFIG_ETRAX_SER0_DTR_ON_PB_BIT == -1 -# ifndef CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER0_RI_ON_PB_BIT == -1 -# ifndef CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER0_DSR_ON_PB_BIT == -1 -# ifndef CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER0_CD_ON_PB_BIT == -1 -# ifndef CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -#endif - -#endif /* PORT0 */ - - -#ifdef CONFIG_ETRAX_SERIAL_PORT1 - -#define SER1_PA_BITSUM (CONFIG_ETRAX_SER1_DTR_ON_PA_BIT+CONFIG_ETRAX_SER1_RI_ON_PA_BIT+CONFIG_ETRAX_SER1_DSR_ON_PA_BIT+CONFIG_ETRAX_SER1_CD_ON_PA_BIT) - -#if SER1_PA_BITSUM != -4 -# if CONFIG_ETRAX_SER1_DTR_ON_PA_BIT == -1 -# ifndef CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER1_RI_ON_PA_BIT == -1 -# ifndef CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER1_DSR_ON_PA_BIT == -1 -# ifndef CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER1_CD_ON_PA_BIT == -1 -# ifndef CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -#endif - -#define SER1_PB_BITSUM (CONFIG_ETRAX_SER1_DTR_ON_PB_BIT+CONFIG_ETRAX_SER1_RI_ON_PB_BIT+CONFIG_ETRAX_SER1_DSR_ON_PB_BIT+CONFIG_ETRAX_SER1_CD_ON_PB_BIT) - -#if SER1_PB_BITSUM != -4 -# if CONFIG_ETRAX_SER1_DTR_ON_PB_BIT == -1 -# ifndef CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER1_RI_ON_PB_BIT == -1 -# ifndef CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER1_DSR_ON_PB_BIT == -1 -# ifndef CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER1_CD_ON_PB_BIT == -1 -# ifndef CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -#endif - -#endif /* PORT1 */ - -#ifdef CONFIG_ETRAX_SERIAL_PORT2 - -#define SER2_PA_BITSUM (CONFIG_ETRAX_SER2_DTR_ON_PA_BIT+CONFIG_ETRAX_SER2_RI_ON_PA_BIT+CONFIG_ETRAX_SER2_DSR_ON_PA_BIT+CONFIG_ETRAX_SER2_CD_ON_PA_BIT) - -#if SER2_PA_BITSUM != -4 -# if CONFIG_ETRAX_SER2_DTR_ON_PA_BIT == -1 -# ifndef CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER2_RI_ON_PA_BIT == -1 -# ifndef CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER2_DSR_ON_PA_BIT == -1 -# ifndef CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER2_CD_ON_PA_BIT == -1 -# ifndef CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -#endif - -#define SER2_PB_BITSUM (CONFIG_ETRAX_SER2_DTR_ON_PB_BIT+CONFIG_ETRAX_SER2_RI_ON_PB_BIT+CONFIG_ETRAX_SER2_DSR_ON_PB_BIT+CONFIG_ETRAX_SER2_CD_ON_PB_BIT) - -#if SER2_PB_BITSUM != -4 -# if CONFIG_ETRAX_SER2_DTR_ON_PB_BIT == -1 -# ifndef CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER2_RI_ON_PB_BIT == -1 -# ifndef CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER2_DSR_ON_PB_BIT == -1 -# ifndef CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER2_CD_ON_PB_BIT == -1 -# ifndef CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -#endif - -#endif /* PORT2 */ - -#ifdef CONFIG_ETRAX_SERIAL_PORT3 - -#define SER3_PA_BITSUM (CONFIG_ETRAX_SER3_DTR_ON_PA_BIT+CONFIG_ETRAX_SER3_RI_ON_PA_BIT+CONFIG_ETRAX_SER3_DSR_ON_PA_BIT+CONFIG_ETRAX_SER3_CD_ON_PA_BIT) - -#if SER3_PA_BITSUM != -4 -# if CONFIG_ETRAX_SER3_DTR_ON_PA_BIT == -1 -# ifndef CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER3_RI_ON_PA_BIT == -1 -# ifndef CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER3_DSR_ON_PA_BIT == -1 -# ifndef CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER3_CD_ON_PA_BIT == -1 -# ifndef CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -#endif - -#define SER3_PB_BITSUM (CONFIG_ETRAX_SER3_DTR_ON_PB_BIT+CONFIG_ETRAX_SER3_RI_ON_PB_BIT+CONFIG_ETRAX_SER3_DSR_ON_PB_BIT+CONFIG_ETRAX_SER3_CD_ON_PB_BIT) - -#if SER3_PB_BITSUM != -4 -# if CONFIG_ETRAX_SER3_DTR_ON_PB_BIT == -1 -# ifndef CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER3_RI_ON_PB_BIT == -1 -# ifndef CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER3_DSR_ON_PB_BIT == -1 -# ifndef CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -# if CONFIG_ETRAX_SER3_CD_ON_PB_BIT == -1 -# ifndef CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED -# define CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED 1 -# endif -# endif -#endif - -#endif /* PORT3 */ - - -#if defined(CONFIG_ETRAX_SER0_DTR_RI_DSR_CD_MIXED) || \ - defined(CONFIG_ETRAX_SER1_DTR_RI_DSR_CD_MIXED) || \ - defined(CONFIG_ETRAX_SER2_DTR_RI_DSR_CD_MIXED) || \ - defined(CONFIG_ETRAX_SER3_DTR_RI_DSR_CD_MIXED) -#define CONFIG_ETRAX_SERX_DTR_RI_DSR_CD_MIXED -#endif - -#ifdef CONFIG_ETRAX_SERX_DTR_RI_DSR_CD_MIXED -/* The pins can be mixed on PA and PB */ -#define CONTROL_PINS_PORT_NOT_USED(line) \ - &dummy_ser[line], &dummy_ser[line], \ - &dummy_ser[line], &dummy_ser[line], \ - &dummy_ser[line], &dummy_ser[line], \ - &dummy_ser[line], &dummy_ser[line], \ - DUMMY_DTR_MASK, DUMMY_RI_MASK, DUMMY_DSR_MASK, DUMMY_CD_MASK - - -struct control_pins -{ - volatile unsigned char *dtr_port; - unsigned char *dtr_shadow; - volatile unsigned char *ri_port; - unsigned char *ri_shadow; - volatile unsigned char *dsr_port; - unsigned char *dsr_shadow; - volatile unsigned char *cd_port; - unsigned char *cd_shadow; - - unsigned char dtr_mask; - unsigned char ri_mask; - unsigned char dsr_mask; - unsigned char cd_mask; -}; - -static const struct control_pins e100_modem_pins[NR_PORTS] = -{ - /* Ser 0 */ - { -#ifdef CONFIG_ETRAX_SERIAL_PORT0 - E100_STRUCT_PORT(0,DTR), E100_STRUCT_SHADOW(0,DTR), - E100_STRUCT_PORT(0,RI), E100_STRUCT_SHADOW(0,RI), - E100_STRUCT_PORT(0,DSR), E100_STRUCT_SHADOW(0,DSR), - E100_STRUCT_PORT(0,CD), E100_STRUCT_SHADOW(0,CD), - E100_STRUCT_MASK(0,DTR), - E100_STRUCT_MASK(0,RI), - E100_STRUCT_MASK(0,DSR), - E100_STRUCT_MASK(0,CD) -#else - CONTROL_PINS_PORT_NOT_USED(0) -#endif - }, - - /* Ser 1 */ - { -#ifdef CONFIG_ETRAX_SERIAL_PORT1 - E100_STRUCT_PORT(1,DTR), E100_STRUCT_SHADOW(1,DTR), - E100_STRUCT_PORT(1,RI), E100_STRUCT_SHADOW(1,RI), - E100_STRUCT_PORT(1,DSR), E100_STRUCT_SHADOW(1,DSR), - E100_STRUCT_PORT(1,CD), E100_STRUCT_SHADOW(1,CD), - E100_STRUCT_MASK(1,DTR), - E100_STRUCT_MASK(1,RI), - E100_STRUCT_MASK(1,DSR), - E100_STRUCT_MASK(1,CD) -#else - CONTROL_PINS_PORT_NOT_USED(1) -#endif - }, - - /* Ser 2 */ - { -#ifdef CONFIG_ETRAX_SERIAL_PORT2 - E100_STRUCT_PORT(2,DTR), E100_STRUCT_SHADOW(2,DTR), - E100_STRUCT_PORT(2,RI), E100_STRUCT_SHADOW(2,RI), - E100_STRUCT_PORT(2,DSR), E100_STRUCT_SHADOW(2,DSR), - E100_STRUCT_PORT(2,CD), E100_STRUCT_SHADOW(2,CD), - E100_STRUCT_MASK(2,DTR), - E100_STRUCT_MASK(2,RI), - E100_STRUCT_MASK(2,DSR), - E100_STRUCT_MASK(2,CD) -#else - CONTROL_PINS_PORT_NOT_USED(2) -#endif - }, - - /* Ser 3 */ - { -#ifdef CONFIG_ETRAX_SERIAL_PORT3 - E100_STRUCT_PORT(3,DTR), E100_STRUCT_SHADOW(3,DTR), - E100_STRUCT_PORT(3,RI), E100_STRUCT_SHADOW(3,RI), - E100_STRUCT_PORT(3,DSR), E100_STRUCT_SHADOW(3,DSR), - E100_STRUCT_PORT(3,CD), E100_STRUCT_SHADOW(3,CD), - E100_STRUCT_MASK(3,DTR), - E100_STRUCT_MASK(3,RI), - E100_STRUCT_MASK(3,DSR), - E100_STRUCT_MASK(3,CD) -#else - CONTROL_PINS_PORT_NOT_USED(3) -#endif - } -}; -#else /* CONFIG_ETRAX_SERX_DTR_RI_DSR_CD_MIXED */ - -/* All pins are on either PA or PB for each serial port */ -#define CONTROL_PINS_PORT_NOT_USED(line) \ - &dummy_ser[line], &dummy_ser[line], \ - DUMMY_DTR_MASK, DUMMY_RI_MASK, DUMMY_DSR_MASK, DUMMY_CD_MASK - - -struct control_pins -{ - volatile unsigned char *port; - unsigned char *shadow; - - unsigned char dtr_mask; - unsigned char ri_mask; - unsigned char dsr_mask; - unsigned char cd_mask; -}; - -#define dtr_port port -#define dtr_shadow shadow -#define ri_port port -#define ri_shadow shadow -#define dsr_port port -#define dsr_shadow shadow -#define cd_port port -#define cd_shadow shadow - -static const struct control_pins e100_modem_pins[NR_PORTS] = -{ - /* Ser 0 */ - { -#ifdef CONFIG_ETRAX_SERIAL_PORT0 - E100_STRUCT_PORT(0,DTR), E100_STRUCT_SHADOW(0,DTR), - E100_STRUCT_MASK(0,DTR), - E100_STRUCT_MASK(0,RI), - E100_STRUCT_MASK(0,DSR), - E100_STRUCT_MASK(0,CD) -#else - CONTROL_PINS_PORT_NOT_USED(0) -#endif - }, - - /* Ser 1 */ - { -#ifdef CONFIG_ETRAX_SERIAL_PORT1 - E100_STRUCT_PORT(1,DTR), E100_STRUCT_SHADOW(1,DTR), - E100_STRUCT_MASK(1,DTR), - E100_STRUCT_MASK(1,RI), - E100_STRUCT_MASK(1,DSR), - E100_STRUCT_MASK(1,CD) -#else - CONTROL_PINS_PORT_NOT_USED(1) -#endif - }, - - /* Ser 2 */ - { -#ifdef CONFIG_ETRAX_SERIAL_PORT2 - E100_STRUCT_PORT(2,DTR), E100_STRUCT_SHADOW(2,DTR), - E100_STRUCT_MASK(2,DTR), - E100_STRUCT_MASK(2,RI), - E100_STRUCT_MASK(2,DSR), - E100_STRUCT_MASK(2,CD) -#else - CONTROL_PINS_PORT_NOT_USED(2) -#endif - }, - - /* Ser 3 */ - { -#ifdef CONFIG_ETRAX_SERIAL_PORT3 - E100_STRUCT_PORT(3,DTR), E100_STRUCT_SHADOW(3,DTR), - E100_STRUCT_MASK(3,DTR), - E100_STRUCT_MASK(3,RI), - E100_STRUCT_MASK(3,DSR), - E100_STRUCT_MASK(3,CD) -#else - CONTROL_PINS_PORT_NOT_USED(3) -#endif - } -}; -#endif /* !CONFIG_ETRAX_SERX_DTR_RI_DSR_CD_MIXED */ - -#define E100_RTS_MASK 0x20 -#define E100_CTS_MASK 0x40 - -/* All serial port signals are active low: - * active = 0 -> 3.3V to RS-232 driver -> -12V on RS-232 level - * inactive = 1 -> 0V to RS-232 driver -> +12V on RS-232 level - * - * These macros returns the pin value: 0=0V, >=1 = 3.3V on ETRAX chip - */ - -/* Output */ -#define E100_RTS_GET(info) ((info)->rx_ctrl & E100_RTS_MASK) -/* Input */ -#define E100_CTS_GET(info) ((info)->ioport[REG_STATUS] & E100_CTS_MASK) - -/* These are typically PA or PB and 0 means 0V, 1 means 3.3V */ -/* Is an output */ -#define E100_DTR_GET(info) ((*e100_modem_pins[(info)->line].dtr_shadow) & e100_modem_pins[(info)->line].dtr_mask) - -/* Normally inputs */ -#define E100_RI_GET(info) ((*e100_modem_pins[(info)->line].ri_port) & e100_modem_pins[(info)->line].ri_mask) -#define E100_CD_GET(info) ((*e100_modem_pins[(info)->line].cd_port) & e100_modem_pins[(info)->line].cd_mask) - -/* Input */ -#define E100_DSR_GET(info) ((*e100_modem_pins[(info)->line].dsr_port) & e100_modem_pins[(info)->line].dsr_mask) - - -/* - * tmp_buf is used as a temporary buffer by serial_write. We need to - * lock it in case the memcpy_fromfs blocks while swapping in a page, - * and some other program tries to do a serial write at the same time. - * Since the lock will only come under contention when the system is - * swapping and available memory is low, it makes sense to share one - * buffer across all the serial ports, since it significantly saves - * memory if large numbers of serial ports are open. - */ -static unsigned char *tmp_buf; -static DEFINE_MUTEX(tmp_buf_mutex); - -/* Calculate the chartime depending on baudrate, numbor of bits etc. */ -static void update_char_time(struct e100_serial * info) -{ - tcflag_t cflags = info->port.tty->termios->c_cflag; - int bits; - - /* calc. number of bits / data byte */ - /* databits + startbit and 1 stopbit */ - if ((cflags & CSIZE) == CS7) - bits = 9; - else - bits = 10; - - if (cflags & CSTOPB) /* 2 stopbits ? */ - bits++; - - if (cflags & PARENB) /* parity bit ? */ - bits++; - - /* calc timeout */ - info->char_time_usec = ((bits * 1000000) / info->baud) + 1; - info->flush_time_usec = 4*info->char_time_usec; - if (info->flush_time_usec < MIN_FLUSH_TIME_USEC) - info->flush_time_usec = MIN_FLUSH_TIME_USEC; - -} - -/* - * This function maps from the Bxxxx defines in asm/termbits.h into real - * baud rates. - */ - -static int -cflag_to_baud(unsigned int cflag) -{ - static int baud_table[] = { - 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, - 4800, 9600, 19200, 38400 }; - - static int ext_baud_table[] = { - 0, 57600, 115200, 230400, 460800, 921600, 1843200, 6250000, - 0, 0, 0, 0, 0, 0, 0, 0 }; - - if (cflag & CBAUDEX) - return ext_baud_table[(cflag & CBAUD) & ~CBAUDEX]; - else - return baud_table[cflag & CBAUD]; -} - -/* and this maps to an etrax100 hardware baud constant */ - -static unsigned char -cflag_to_etrax_baud(unsigned int cflag) -{ - char retval; - - static char baud_table[] = { - -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, -1, 3, 4, 5, 6, 7 }; - - static char ext_baud_table[] = { - -1, 8, 9, 10, 11, 12, 13, 14, -1, -1, -1, -1, -1, -1, -1, -1 }; - - if (cflag & CBAUDEX) - retval = ext_baud_table[(cflag & CBAUD) & ~CBAUDEX]; - else - retval = baud_table[cflag & CBAUD]; - - if (retval < 0) { - printk(KERN_WARNING "serdriver tried setting invalid baud rate, flags %x.\n", cflag); - retval = 5; /* choose default 9600 instead */ - } - - return retval | (retval << 4); /* choose same for both TX and RX */ -} - - -/* Various static support functions */ - -/* Functions to set or clear DTR/RTS on the requested line */ -/* It is complicated by the fact that RTS is a serial port register, while - * DTR might not be implemented in the HW at all, and if it is, it can be on - * any general port. - */ - - -static inline void -e100_dtr(struct e100_serial *info, int set) -{ -#ifndef CONFIG_SVINTO_SIM - unsigned char mask = e100_modem_pins[info->line].dtr_mask; - -#ifdef SERIAL_DEBUG_IO - printk("ser%i dtr %i mask: 0x%02X\n", info->line, set, mask); - printk("ser%i shadow before 0x%02X get: %i\n", - info->line, *e100_modem_pins[info->line].dtr_shadow, - E100_DTR_GET(info)); -#endif - /* DTR is active low */ - { - unsigned long flags; - - local_irq_save(flags); - *e100_modem_pins[info->line].dtr_shadow &= ~mask; - *e100_modem_pins[info->line].dtr_shadow |= (set ? 0 : mask); - *e100_modem_pins[info->line].dtr_port = *e100_modem_pins[info->line].dtr_shadow; - local_irq_restore(flags); - } - -#ifdef SERIAL_DEBUG_IO - printk("ser%i shadow after 0x%02X get: %i\n", - info->line, *e100_modem_pins[info->line].dtr_shadow, - E100_DTR_GET(info)); -#endif -#endif -} - -/* set = 0 means 3.3V on the pin, bitvalue: 0=active, 1=inactive - * 0=0V , 1=3.3V - */ -static inline void -e100_rts(struct e100_serial *info, int set) -{ -#ifndef CONFIG_SVINTO_SIM - unsigned long flags; - local_irq_save(flags); - info->rx_ctrl &= ~E100_RTS_MASK; - info->rx_ctrl |= (set ? 0 : E100_RTS_MASK); /* RTS is active low */ - info->ioport[REG_REC_CTRL] = info->rx_ctrl; - local_irq_restore(flags); -#ifdef SERIAL_DEBUG_IO - printk("ser%i rts %i\n", info->line, set); -#endif -#endif -} - - -/* If this behaves as a modem, RI and CD is an output */ -static inline void -e100_ri_out(struct e100_serial *info, int set) -{ -#ifndef CONFIG_SVINTO_SIM - /* RI is active low */ - { - unsigned char mask = e100_modem_pins[info->line].ri_mask; - unsigned long flags; - - local_irq_save(flags); - *e100_modem_pins[info->line].ri_shadow &= ~mask; - *e100_modem_pins[info->line].ri_shadow |= (set ? 0 : mask); - *e100_modem_pins[info->line].ri_port = *e100_modem_pins[info->line].ri_shadow; - local_irq_restore(flags); - } -#endif -} -static inline void -e100_cd_out(struct e100_serial *info, int set) -{ -#ifndef CONFIG_SVINTO_SIM - /* CD is active low */ - { - unsigned char mask = e100_modem_pins[info->line].cd_mask; - unsigned long flags; - - local_irq_save(flags); - *e100_modem_pins[info->line].cd_shadow &= ~mask; - *e100_modem_pins[info->line].cd_shadow |= (set ? 0 : mask); - *e100_modem_pins[info->line].cd_port = *e100_modem_pins[info->line].cd_shadow; - local_irq_restore(flags); - } -#endif -} - -static inline void -e100_disable_rx(struct e100_serial *info) -{ -#ifndef CONFIG_SVINTO_SIM - /* disable the receiver */ - info->ioport[REG_REC_CTRL] = - (info->rx_ctrl &= ~IO_MASK(R_SERIAL0_REC_CTRL, rec_enable)); -#endif -} - -static inline void -e100_enable_rx(struct e100_serial *info) -{ -#ifndef CONFIG_SVINTO_SIM - /* enable the receiver */ - info->ioport[REG_REC_CTRL] = - (info->rx_ctrl |= IO_MASK(R_SERIAL0_REC_CTRL, rec_enable)); -#endif -} - -/* the rx DMA uses both the dma_descr and the dma_eop interrupts */ - -static inline void -e100_disable_rxdma_irq(struct e100_serial *info) -{ -#ifdef SERIAL_DEBUG_INTR - printk("rxdma_irq(%d): 0\n",info->line); -#endif - DINTR1(DEBUG_LOG(info->line,"IRQ disable_rxdma_irq %i\n", info->line)); - *R_IRQ_MASK2_CLR = (info->irq << 2) | (info->irq << 3); -} - -static inline void -e100_enable_rxdma_irq(struct e100_serial *info) -{ -#ifdef SERIAL_DEBUG_INTR - printk("rxdma_irq(%d): 1\n",info->line); -#endif - DINTR1(DEBUG_LOG(info->line,"IRQ enable_rxdma_irq %i\n", info->line)); - *R_IRQ_MASK2_SET = (info->irq << 2) | (info->irq << 3); -} - -/* the tx DMA uses only dma_descr interrupt */ - -static void e100_disable_txdma_irq(struct e100_serial *info) -{ -#ifdef SERIAL_DEBUG_INTR - printk("txdma_irq(%d): 0\n",info->line); -#endif - DINTR1(DEBUG_LOG(info->line,"IRQ disable_txdma_irq %i\n", info->line)); - *R_IRQ_MASK2_CLR = info->irq; -} - -static void e100_enable_txdma_irq(struct e100_serial *info) -{ -#ifdef SERIAL_DEBUG_INTR - printk("txdma_irq(%d): 1\n",info->line); -#endif - DINTR1(DEBUG_LOG(info->line,"IRQ enable_txdma_irq %i\n", info->line)); - *R_IRQ_MASK2_SET = info->irq; -} - -static void e100_disable_txdma_channel(struct e100_serial *info) -{ - unsigned long flags; - - /* Disable output DMA channel for the serial port in question - * ( set to something other than serialX) - */ - local_irq_save(flags); - DFLOW(DEBUG_LOG(info->line, "disable_txdma_channel %i\n", info->line)); - if (info->line == 0) { - if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma6)) == - IO_STATE(R_GEN_CONFIG, dma6, serial0)) { - genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma6); - genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma6, unused); - } - } else if (info->line == 1) { - if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma8)) == - IO_STATE(R_GEN_CONFIG, dma8, serial1)) { - genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma8); - genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma8, usb); - } - } else if (info->line == 2) { - if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma2)) == - IO_STATE(R_GEN_CONFIG, dma2, serial2)) { - genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma2); - genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma2, par0); - } - } else if (info->line == 3) { - if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma4)) == - IO_STATE(R_GEN_CONFIG, dma4, serial3)) { - genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma4); - genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma4, par1); - } - } - *R_GEN_CONFIG = genconfig_shadow; - local_irq_restore(flags); -} - - -static void e100_enable_txdma_channel(struct e100_serial *info) -{ - unsigned long flags; - - local_irq_save(flags); - DFLOW(DEBUG_LOG(info->line, "enable_txdma_channel %i\n", info->line)); - /* Enable output DMA channel for the serial port in question */ - if (info->line == 0) { - genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma6); - genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma6, serial0); - } else if (info->line == 1) { - genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma8); - genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma8, serial1); - } else if (info->line == 2) { - genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma2); - genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma2, serial2); - } else if (info->line == 3) { - genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma4); - genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma4, serial3); - } - *R_GEN_CONFIG = genconfig_shadow; - local_irq_restore(flags); -} - -static void e100_disable_rxdma_channel(struct e100_serial *info) -{ - unsigned long flags; - - /* Disable input DMA channel for the serial port in question - * ( set to something other than serialX) - */ - local_irq_save(flags); - if (info->line == 0) { - if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma7)) == - IO_STATE(R_GEN_CONFIG, dma7, serial0)) { - genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma7); - genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma7, unused); - } - } else if (info->line == 1) { - if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma9)) == - IO_STATE(R_GEN_CONFIG, dma9, serial1)) { - genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma9); - genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma9, usb); - } - } else if (info->line == 2) { - if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma3)) == - IO_STATE(R_GEN_CONFIG, dma3, serial2)) { - genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma3); - genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma3, par0); - } - } else if (info->line == 3) { - if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma5)) == - IO_STATE(R_GEN_CONFIG, dma5, serial3)) { - genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma5); - genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma5, par1); - } - } - *R_GEN_CONFIG = genconfig_shadow; - local_irq_restore(flags); -} - - -static void e100_enable_rxdma_channel(struct e100_serial *info) -{ - unsigned long flags; - - local_irq_save(flags); - /* Enable input DMA channel for the serial port in question */ - if (info->line == 0) { - genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma7); - genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma7, serial0); - } else if (info->line == 1) { - genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma9); - genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma9, serial1); - } else if (info->line == 2) { - genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma3); - genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma3, serial2); - } else if (info->line == 3) { - genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma5); - genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma5, serial3); - } - *R_GEN_CONFIG = genconfig_shadow; - local_irq_restore(flags); -} - -#ifdef SERIAL_HANDLE_EARLY_ERRORS -/* in order to detect and fix errors on the first byte - we have to use the serial interrupts as well. */ - -static inline void -e100_disable_serial_data_irq(struct e100_serial *info) -{ -#ifdef SERIAL_DEBUG_INTR - printk("ser_irq(%d): 0\n",info->line); -#endif - DINTR1(DEBUG_LOG(info->line,"IRQ disable data_irq %i\n", info->line)); - *R_IRQ_MASK1_CLR = (1U << (8+2*info->line)); -} - -static inline void -e100_enable_serial_data_irq(struct e100_serial *info) -{ -#ifdef SERIAL_DEBUG_INTR - printk("ser_irq(%d): 1\n",info->line); - printk("**** %d = %d\n", - (8+2*info->line), - (1U << (8+2*info->line))); -#endif - DINTR1(DEBUG_LOG(info->line,"IRQ enable data_irq %i\n", info->line)); - *R_IRQ_MASK1_SET = (1U << (8+2*info->line)); -} -#endif - -static inline void -e100_disable_serial_tx_ready_irq(struct e100_serial *info) -{ -#ifdef SERIAL_DEBUG_INTR - printk("ser_tx_irq(%d): 0\n",info->line); -#endif - DINTR1(DEBUG_LOG(info->line,"IRQ disable ready_irq %i\n", info->line)); - *R_IRQ_MASK1_CLR = (1U << (8+1+2*info->line)); -} - -static inline void -e100_enable_serial_tx_ready_irq(struct e100_serial *info) -{ -#ifdef SERIAL_DEBUG_INTR - printk("ser_tx_irq(%d): 1\n",info->line); - printk("**** %d = %d\n", - (8+1+2*info->line), - (1U << (8+1+2*info->line))); -#endif - DINTR2(DEBUG_LOG(info->line,"IRQ enable ready_irq %i\n", info->line)); - *R_IRQ_MASK1_SET = (1U << (8+1+2*info->line)); -} - -static inline void e100_enable_rx_irq(struct e100_serial *info) -{ - if (info->uses_dma_in) - e100_enable_rxdma_irq(info); - else - e100_enable_serial_data_irq(info); -} -static inline void e100_disable_rx_irq(struct e100_serial *info) -{ - if (info->uses_dma_in) - e100_disable_rxdma_irq(info); - else - e100_disable_serial_data_irq(info); -} - -#if defined(CONFIG_ETRAX_RS485) -/* Enable RS-485 mode on selected port. This is UGLY. */ -static int -e100_enable_rs485(struct tty_struct *tty, struct serial_rs485 *r) -{ - struct e100_serial * info = (struct e100_serial *)tty->driver_data; - -#if defined(CONFIG_ETRAX_RS485_ON_PA) - *R_PORT_PA_DATA = port_pa_data_shadow |= (1 << rs485_pa_bit); -#endif -#if defined(CONFIG_ETRAX_RS485_ON_PORT_G) - REG_SHADOW_SET(R_PORT_G_DATA, port_g_data_shadow, - rs485_port_g_bit, 1); -#endif -#if defined(CONFIG_ETRAX_RS485_LTC1387) - REG_SHADOW_SET(R_PORT_G_DATA, port_g_data_shadow, - CONFIG_ETRAX_RS485_LTC1387_DXEN_PORT_G_BIT, 1); - REG_SHADOW_SET(R_PORT_G_DATA, port_g_data_shadow, - CONFIG_ETRAX_RS485_LTC1387_RXEN_PORT_G_BIT, 1); -#endif - - info->rs485 = *r; - - /* Maximum delay before RTS equal to 1000 */ - if (info->rs485.delay_rts_before_send >= 1000) - info->rs485.delay_rts_before_send = 1000; - -/* printk("rts: on send = %i, after = %i, enabled = %i", - info->rs485.rts_on_send, - info->rs485.rts_after_sent, - info->rs485.enabled - ); -*/ - return 0; -} - -static int -e100_write_rs485(struct tty_struct *tty, - const unsigned char *buf, int count) -{ - struct e100_serial * info = (struct e100_serial *)tty->driver_data; - int old_value = (info->rs485.flags) & SER_RS485_ENABLED; - - /* rs485 is always implicitly enabled if we're using the ioctl() - * but it doesn't have to be set in the serial_rs485 - * (to be backward compatible with old apps) - * So we store, set and restore it. - */ - info->rs485.flags |= SER_RS485_ENABLED; - /* rs_write now deals with RS485 if enabled */ - count = rs_write(tty, buf, count); - if (!old_value) - info->rs485.flags &= ~(SER_RS485_ENABLED); - return count; -} - -#ifdef CONFIG_ETRAX_FAST_TIMER -/* Timer function to toggle RTS when using FAST_TIMER */ -static void rs485_toggle_rts_timer_function(unsigned long data) -{ - struct e100_serial *info = (struct e100_serial *)data; - - fast_timers_rs485[info->line].function = NULL; - e100_rts(info, (info->rs485.flags & SER_RS485_RTS_AFTER_SEND)); -#if defined(CONFIG_ETRAX_RS485_DISABLE_RECEIVER) - e100_enable_rx(info); - e100_enable_rx_irq(info); -#endif -} -#endif -#endif /* CONFIG_ETRAX_RS485 */ - -/* - * ------------------------------------------------------------ - * rs_stop() and rs_start() - * - * This routines are called before setting or resetting tty->stopped. - * They enable or disable transmitter using the XOFF registers, as necessary. - * ------------------------------------------------------------ - */ - -static void -rs_stop(struct tty_struct *tty) -{ - struct e100_serial *info = (struct e100_serial *)tty->driver_data; - if (info) { - unsigned long flags; - unsigned long xoff; - - local_irq_save(flags); - DFLOW(DEBUG_LOG(info->line, "XOFF rs_stop xmit %i\n", - CIRC_CNT(info->xmit.head, - info->xmit.tail,SERIAL_XMIT_SIZE))); - - xoff = IO_FIELD(R_SERIAL0_XOFF, xoff_char, - STOP_CHAR(info->port.tty)); - xoff |= IO_STATE(R_SERIAL0_XOFF, tx_stop, stop); - if (tty->termios->c_iflag & IXON ) { - xoff |= IO_STATE(R_SERIAL0_XOFF, auto_xoff, enable); - } - - *((unsigned long *)&info->ioport[REG_XOFF]) = xoff; - local_irq_restore(flags); - } -} - -static void -rs_start(struct tty_struct *tty) -{ - struct e100_serial *info = (struct e100_serial *)tty->driver_data; - if (info) { - unsigned long flags; - unsigned long xoff; - - local_irq_save(flags); - DFLOW(DEBUG_LOG(info->line, "XOFF rs_start xmit %i\n", - CIRC_CNT(info->xmit.head, - info->xmit.tail,SERIAL_XMIT_SIZE))); - xoff = IO_FIELD(R_SERIAL0_XOFF, xoff_char, STOP_CHAR(tty)); - xoff |= IO_STATE(R_SERIAL0_XOFF, tx_stop, enable); - if (tty->termios->c_iflag & IXON ) { - xoff |= IO_STATE(R_SERIAL0_XOFF, auto_xoff, enable); - } - - *((unsigned long *)&info->ioport[REG_XOFF]) = xoff; - if (!info->uses_dma_out && - info->xmit.head != info->xmit.tail && info->xmit.buf) - e100_enable_serial_tx_ready_irq(info); - - local_irq_restore(flags); - } -} - -/* - * ---------------------------------------------------------------------- - * - * Here starts the interrupt handling routines. All of the following - * subroutines are declared as inline and are folded into - * rs_interrupt(). They were separated out for readability's sake. - * - * Note: rs_interrupt() is a "fast" interrupt, which means that it - * runs with interrupts turned off. People who may want to modify - * rs_interrupt() should try to keep the interrupt handler as fast as - * possible. After you are done making modifications, it is not a bad - * idea to do: - * - * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c - * - * and look at the resulting assemble code in serial.s. - * - * - Ted Ts'o (tytso@mit.edu), 7-Mar-93 - * ----------------------------------------------------------------------- - */ - -/* - * This routine is used by the interrupt handler to schedule - * processing in the software interrupt portion of the driver. - */ -static void rs_sched_event(struct e100_serial *info, int event) -{ - if (info->event & (1 << event)) - return; - info->event |= 1 << event; - schedule_work(&info->work); -} - -/* The output DMA channel is free - use it to send as many chars as possible - * NOTES: - * We don't pay attention to info->x_char, which means if the TTY wants to - * use XON/XOFF it will set info->x_char but we won't send any X char! - * - * To implement this, we'd just start a DMA send of 1 byte pointing at a - * buffer containing the X char, and skip updating xmit. We'd also have to - * check if the last sent char was the X char when we enter this function - * the next time, to avoid updating xmit with the sent X value. - */ - -static void -transmit_chars_dma(struct e100_serial *info) -{ - unsigned int c, sentl; - struct etrax_dma_descr *descr; - -#ifdef CONFIG_SVINTO_SIM - /* This will output too little if tail is not 0 always since - * we don't reloop to send the other part. Anyway this SHOULD be a - * no-op - transmit_chars_dma would never really be called during sim - * since rs_write does not write into the xmit buffer then. - */ - if (info->xmit.tail) - printk("Error in serial.c:transmit_chars-dma(), tail!=0\n"); - if (info->xmit.head != info->xmit.tail) { - SIMCOUT(info->xmit.buf + info->xmit.tail, - CIRC_CNT(info->xmit.head, - info->xmit.tail, - SERIAL_XMIT_SIZE)); - info->xmit.head = info->xmit.tail; /* move back head */ - info->tr_running = 0; - } - return; -#endif - /* acknowledge both dma_descr and dma_eop irq in R_DMA_CHx_CLR_INTR */ - *info->oclrintradr = - IO_STATE(R_DMA_CH6_CLR_INTR, clr_descr, do) | - IO_STATE(R_DMA_CH6_CLR_INTR, clr_eop, do); - -#ifdef SERIAL_DEBUG_INTR - if (info->line == SERIAL_DEBUG_LINE) - printk("tc\n"); -#endif - if (!info->tr_running) { - /* weirdo... we shouldn't get here! */ - printk(KERN_WARNING "Achtung: transmit_chars_dma with !tr_running\n"); - return; - } - - descr = &info->tr_descr; - - /* first get the amount of bytes sent during the last DMA transfer, - and update xmit accordingly */ - - /* if the stop bit was not set, all data has been sent */ - if (!(descr->status & d_stop)) { - sentl = descr->sw_len; - } else - /* otherwise we find the amount of data sent here */ - sentl = descr->hw_len; - - DFLOW(DEBUG_LOG(info->line, "TX %i done\n", sentl)); - - /* update stats */ - info->icount.tx += sentl; - - /* update xmit buffer */ - info->xmit.tail = (info->xmit.tail + sentl) & (SERIAL_XMIT_SIZE - 1); - - /* if there is only a few chars left in the buf, wake up the blocked - write if any */ - if (CIRC_CNT(info->xmit.head, - info->xmit.tail, - SERIAL_XMIT_SIZE) < WAKEUP_CHARS) - rs_sched_event(info, RS_EVENT_WRITE_WAKEUP); - - /* find out the largest amount of consecutive bytes we want to send now */ - - c = CIRC_CNT_TO_END(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE); - - /* Don't send all in one DMA transfer - divide it so we wake up - * application before all is sent - */ - - if (c >= 4*WAKEUP_CHARS) - c = c/2; - - if (c <= 0) { - /* our job here is done, don't schedule any new DMA transfer */ - info->tr_running = 0; - -#if defined(CONFIG_ETRAX_RS485) && defined(CONFIG_ETRAX_FAST_TIMER) - if (info->rs485.flags & SER_RS485_ENABLED) { - /* Set a short timer to toggle RTS */ - start_one_shot_timer(&fast_timers_rs485[info->line], - rs485_toggle_rts_timer_function, - (unsigned long)info, - info->char_time_usec*2, - "RS-485"); - } -#endif /* RS485 */ - return; - } - - /* ok we can schedule a dma send of c chars starting at info->xmit.tail */ - /* set up the descriptor correctly for output */ - DFLOW(DEBUG_LOG(info->line, "TX %i\n", c)); - descr->ctrl = d_int | d_eol | d_wait; /* Wait needed for tty_wait_until_sent() */ - descr->sw_len = c; - descr->buf = virt_to_phys(info->xmit.buf + info->xmit.tail); - descr->status = 0; - - *info->ofirstadr = virt_to_phys(descr); /* write to R_DMAx_FIRST */ - *info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, start); - - /* DMA is now running (hopefully) */ -} /* transmit_chars_dma */ - -static void -start_transmit(struct e100_serial *info) -{ -#if 0 - if (info->line == SERIAL_DEBUG_LINE) - printk("x\n"); -#endif - - info->tr_descr.sw_len = 0; - info->tr_descr.hw_len = 0; - info->tr_descr.status = 0; - info->tr_running = 1; - if (info->uses_dma_out) - transmit_chars_dma(info); - else - e100_enable_serial_tx_ready_irq(info); -} /* start_transmit */ - -#ifdef CONFIG_ETRAX_SERIAL_FAST_TIMER -static int serial_fast_timer_started = 0; -static int serial_fast_timer_expired = 0; -static void flush_timeout_function(unsigned long data); -#define START_FLUSH_FAST_TIMER_TIME(info, string, usec) {\ - unsigned long timer_flags; \ - local_irq_save(timer_flags); \ - if (fast_timers[info->line].function == NULL) { \ - serial_fast_timer_started++; \ - TIMERD(DEBUG_LOG(info->line, "start_timer %i ", info->line)); \ - TIMERD(DEBUG_LOG(info->line, "num started: %i\n", serial_fast_timer_started)); \ - start_one_shot_timer(&fast_timers[info->line], \ - flush_timeout_function, \ - (unsigned long)info, \ - (usec), \ - string); \ - } \ - else { \ - TIMERD(DEBUG_LOG(info->line, "timer %i already running\n", info->line)); \ - } \ - local_irq_restore(timer_flags); \ -} -#define START_FLUSH_FAST_TIMER(info, string) START_FLUSH_FAST_TIMER_TIME(info, string, info->flush_time_usec) - -#else -#define START_FLUSH_FAST_TIMER_TIME(info, string, usec) -#define START_FLUSH_FAST_TIMER(info, string) -#endif - -static struct etrax_recv_buffer * -alloc_recv_buffer(unsigned int size) -{ - struct etrax_recv_buffer *buffer; - - if (!(buffer = kmalloc(sizeof *buffer + size, GFP_ATOMIC))) - return NULL; - - buffer->next = NULL; - buffer->length = 0; - buffer->error = TTY_NORMAL; - - return buffer; -} - -static void -append_recv_buffer(struct e100_serial *info, struct etrax_recv_buffer *buffer) -{ - unsigned long flags; - - local_irq_save(flags); - - if (!info->first_recv_buffer) - info->first_recv_buffer = buffer; - else - info->last_recv_buffer->next = buffer; - - info->last_recv_buffer = buffer; - - info->recv_cnt += buffer->length; - if (info->recv_cnt > info->max_recv_cnt) - info->max_recv_cnt = info->recv_cnt; - - local_irq_restore(flags); -} - -static int -add_char_and_flag(struct e100_serial *info, unsigned char data, unsigned char flag) -{ - struct etrax_recv_buffer *buffer; - if (info->uses_dma_in) { - if (!(buffer = alloc_recv_buffer(4))) - return 0; - - buffer->length = 1; - buffer->error = flag; - buffer->buffer[0] = data; - - append_recv_buffer(info, buffer); - - info->icount.rx++; - } else { - struct tty_struct *tty = info->port.tty; - tty_insert_flip_char(tty, data, flag); - info->icount.rx++; - } - - return 1; -} - -static unsigned int handle_descr_data(struct e100_serial *info, - struct etrax_dma_descr *descr, - unsigned int recvl) -{ - struct etrax_recv_buffer *buffer = phys_to_virt(descr->buf) - sizeof *buffer; - - if (info->recv_cnt + recvl > 65536) { - printk(KERN_CRIT - "%s: Too much pending incoming serial data! Dropping %u bytes.\n", __func__, recvl); - return 0; - } - - buffer->length = recvl; - - if (info->errorcode == ERRCODE_SET_BREAK) - buffer->error = TTY_BREAK; - info->errorcode = 0; - - append_recv_buffer(info, buffer); - - if (!(buffer = alloc_recv_buffer(SERIAL_DESCR_BUF_SIZE))) - panic("%s: Failed to allocate memory for receive buffer!\n", __func__); - - descr->buf = virt_to_phys(buffer->buffer); - - return recvl; -} - -static unsigned int handle_all_descr_data(struct e100_serial *info) -{ - struct etrax_dma_descr *descr; - unsigned int recvl; - unsigned int ret = 0; - - while (1) - { - descr = &info->rec_descr[info->cur_rec_descr]; - - if (descr == phys_to_virt(*info->idescradr)) - break; - - if (++info->cur_rec_descr == SERIAL_RECV_DESCRIPTORS) - info->cur_rec_descr = 0; - - /* find out how many bytes were read */ - - /* if the eop bit was not set, all data has been received */ - if (!(descr->status & d_eop)) { - recvl = descr->sw_len; - } else { - /* otherwise we find the amount of data received here */ - recvl = descr->hw_len; - } - - /* Reset the status information */ - descr->status = 0; - - DFLOW( DEBUG_LOG(info->line, "RX %lu\n", recvl); - if (info->port.tty->stopped) { - unsigned char *buf = phys_to_virt(descr->buf); - DEBUG_LOG(info->line, "rx 0x%02X\n", buf[0]); - DEBUG_LOG(info->line, "rx 0x%02X\n", buf[1]); - DEBUG_LOG(info->line, "rx 0x%02X\n", buf[2]); - } - ); - - /* update stats */ - info->icount.rx += recvl; - - ret += handle_descr_data(info, descr, recvl); - } - - return ret; -} - -static void receive_chars_dma(struct e100_serial *info) -{ - struct tty_struct *tty; - unsigned char rstat; - -#ifdef CONFIG_SVINTO_SIM - /* No receive in the simulator. Will probably be when the rest of - * the serial interface works, and this piece will just be removed. - */ - return; -#endif - - /* Acknowledge both dma_descr and dma_eop irq in R_DMA_CHx_CLR_INTR */ - *info->iclrintradr = - IO_STATE(R_DMA_CH6_CLR_INTR, clr_descr, do) | - IO_STATE(R_DMA_CH6_CLR_INTR, clr_eop, do); - - tty = info->port.tty; - if (!tty) /* Something wrong... */ - return; - -#ifdef SERIAL_HANDLE_EARLY_ERRORS - if (info->uses_dma_in) - e100_enable_serial_data_irq(info); -#endif - - if (info->errorcode == ERRCODE_INSERT_BREAK) - add_char_and_flag(info, '\0', TTY_BREAK); - - handle_all_descr_data(info); - - /* Read the status register to detect errors */ - rstat = info->ioport[REG_STATUS]; - if (rstat & IO_MASK(R_SERIAL0_STATUS, xoff_detect) ) { - DFLOW(DEBUG_LOG(info->line, "XOFF detect stat %x\n", rstat)); - } - - if (rstat & SER_ERROR_MASK) { - /* If we got an error, we must reset it by reading the - * data_in field - */ - unsigned char data = info->ioport[REG_DATA]; - - PROCSTAT(ser_stat[info->line].errors_cnt++); - DEBUG_LOG(info->line, "#dERR: s d 0x%04X\n", - ((rstat & SER_ERROR_MASK) << 8) | data); - - if (rstat & SER_PAR_ERR_MASK) - add_char_and_flag(info, data, TTY_PARITY); - else if (rstat & SER_OVERRUN_MASK) - add_char_and_flag(info, data, TTY_OVERRUN); - else if (rstat & SER_FRAMING_ERR_MASK) - add_char_and_flag(info, data, TTY_FRAME); - } - - START_FLUSH_FAST_TIMER(info, "receive_chars"); - - /* Restart the receiving DMA */ - *info->icmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, restart); -} - -static int start_recv_dma(struct e100_serial *info) -{ - struct etrax_dma_descr *descr = info->rec_descr; - struct etrax_recv_buffer *buffer; - int i; - - /* Set up the receiving descriptors */ - for (i = 0; i < SERIAL_RECV_DESCRIPTORS; i++) { - if (!(buffer = alloc_recv_buffer(SERIAL_DESCR_BUF_SIZE))) - panic("%s: Failed to allocate memory for receive buffer!\n", __func__); - - descr[i].ctrl = d_int; - descr[i].buf = virt_to_phys(buffer->buffer); - descr[i].sw_len = SERIAL_DESCR_BUF_SIZE; - descr[i].hw_len = 0; - descr[i].status = 0; - descr[i].next = virt_to_phys(&descr[i+1]); - } - - /* Link the last descriptor to the first */ - descr[i-1].next = virt_to_phys(&descr[0]); - - /* Start with the first descriptor in the list */ - info->cur_rec_descr = 0; - - /* Start the DMA */ - *info->ifirstadr = virt_to_phys(&descr[info->cur_rec_descr]); - *info->icmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, start); - - /* Input DMA should be running now */ - return 1; -} - -static void -start_receive(struct e100_serial *info) -{ -#ifdef CONFIG_SVINTO_SIM - /* No receive in the simulator. Will probably be when the rest of - * the serial interface works, and this piece will just be removed. - */ - return; -#endif - if (info->uses_dma_in) { - /* reset the input dma channel to be sure it works */ - - *info->icmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, reset); - while (IO_EXTRACT(R_DMA_CH6_CMD, cmd, *info->icmdadr) == - IO_STATE_VALUE(R_DMA_CH6_CMD, cmd, reset)); - - start_recv_dma(info); - } -} - - -/* the bits in the MASK2 register are laid out like this: - DMAI_EOP DMAI_DESCR DMAO_EOP DMAO_DESCR - where I is the input channel and O is the output channel for the port. - info->irq is the bit number for the DMAO_DESCR so to check the others we - shift info->irq to the left. -*/ - -/* dma output channel interrupt handler - this interrupt is called from DMA2(ser2), DMA4(ser3), DMA6(ser0) or - DMA8(ser1) when they have finished a descriptor with the intr flag set. -*/ - -static irqreturn_t -tr_interrupt(int irq, void *dev_id) -{ - struct e100_serial *info; - unsigned long ireg; - int i; - int handled = 0; - -#ifdef CONFIG_SVINTO_SIM - /* No receive in the simulator. Will probably be when the rest of - * the serial interface works, and this piece will just be removed. - */ - { - const char *s = "What? tr_interrupt in simulator??\n"; - SIMCOUT(s,strlen(s)); - } - return IRQ_HANDLED; -#endif - - /* find out the line that caused this irq and get it from rs_table */ - - ireg = *R_IRQ_MASK2_RD; /* get the active irq bits for the dma channels */ - - for (i = 0; i < NR_PORTS; i++) { - info = rs_table + i; - if (!info->enabled || !info->uses_dma_out) - continue; - /* check for dma_descr (don't need to check for dma_eop in output dma for serial */ - if (ireg & info->irq) { - handled = 1; - /* we can send a new dma bunch. make it so. */ - DINTR2(DEBUG_LOG(info->line, "tr_interrupt %i\n", i)); - /* Read jiffies_usec first, - * we want this time to be as late as possible - */ - PROCSTAT(ser_stat[info->line].tx_dma_ints++); - info->last_tx_active_usec = GET_JIFFIES_USEC(); - info->last_tx_active = jiffies; - transmit_chars_dma(info); - } - - /* FIXME: here we should really check for a change in the - status lines and if so call status_handle(info) */ - } - return IRQ_RETVAL(handled); -} /* tr_interrupt */ - -/* dma input channel interrupt handler */ - -static irqreturn_t -rec_interrupt(int irq, void *dev_id) -{ - struct e100_serial *info; - unsigned long ireg; - int i; - int handled = 0; - -#ifdef CONFIG_SVINTO_SIM - /* No receive in the simulator. Will probably be when the rest of - * the serial interface works, and this piece will just be removed. - */ - { - const char *s = "What? rec_interrupt in simulator??\n"; - SIMCOUT(s,strlen(s)); - } - return IRQ_HANDLED; -#endif - - /* find out the line that caused this irq and get it from rs_table */ - - ireg = *R_IRQ_MASK2_RD; /* get the active irq bits for the dma channels */ - - for (i = 0; i < NR_PORTS; i++) { - info = rs_table + i; - if (!info->enabled || !info->uses_dma_in) - continue; - /* check for both dma_eop and dma_descr for the input dma channel */ - if (ireg & ((info->irq << 2) | (info->irq << 3))) { - handled = 1; - /* we have received something */ - receive_chars_dma(info); - } - - /* FIXME: here we should really check for a change in the - status lines and if so call status_handle(info) */ - } - return IRQ_RETVAL(handled); -} /* rec_interrupt */ - -static int force_eop_if_needed(struct e100_serial *info) -{ - /* We check data_avail bit to determine if data has - * arrived since last time - */ - unsigned char rstat = info->ioport[REG_STATUS]; - - /* error or datavail? */ - if (rstat & SER_ERROR_MASK) { - /* Some error has occurred. If there has been valid data, an - * EOP interrupt will be made automatically. If no data, the - * normal ser_interrupt should be enabled and handle it. - * So do nothing! - */ - DEBUG_LOG(info->line, "timeout err: rstat 0x%03X\n", - rstat | (info->line << 8)); - return 0; - } - - if (rstat & SER_DATA_AVAIL_MASK) { - /* Ok data, no error, count it */ - TIMERD(DEBUG_LOG(info->line, "timeout: rstat 0x%03X\n", - rstat | (info->line << 8))); - /* Read data to clear status flags */ - (void)info->ioport[REG_DATA]; - - info->forced_eop = 0; - START_FLUSH_FAST_TIMER(info, "magic"); - return 0; - } - - /* hit the timeout, force an EOP for the input - * dma channel if we haven't already - */ - if (!info->forced_eop) { - info->forced_eop = 1; - PROCSTAT(ser_stat[info->line].timeout_flush_cnt++); - TIMERD(DEBUG_LOG(info->line, "timeout EOP %i\n", info->line)); - FORCE_EOP(info); - } - - return 1; -} - -static void flush_to_flip_buffer(struct e100_serial *info) -{ - struct tty_struct *tty; - struct etrax_recv_buffer *buffer; - unsigned long flags; - - local_irq_save(flags); - tty = info->port.tty; - - if (!tty) { - local_irq_restore(flags); - return; - } - - while ((buffer = info->first_recv_buffer) != NULL) { - unsigned int count = buffer->length; - - tty_insert_flip_string(tty, buffer->buffer, count); - info->recv_cnt -= count; - - if (count == buffer->length) { - info->first_recv_buffer = buffer->next; - kfree(buffer); - } else { - buffer->length -= count; - memmove(buffer->buffer, buffer->buffer + count, buffer->length); - buffer->error = TTY_NORMAL; - } - } - - if (!info->first_recv_buffer) - info->last_recv_buffer = NULL; - - local_irq_restore(flags); - - /* This includes a check for low-latency */ - tty_flip_buffer_push(tty); -} - -static void check_flush_timeout(struct e100_serial *info) -{ - /* Flip what we've got (if we can) */ - flush_to_flip_buffer(info); - - /* We might need to flip later, but not to fast - * since the system is busy processing input... */ - if (info->first_recv_buffer) - START_FLUSH_FAST_TIMER_TIME(info, "flip", 2000); - - /* Force eop last, since data might have come while we're processing - * and if we started the slow timer above, we won't start a fast - * below. - */ - force_eop_if_needed(info); -} - -#ifdef CONFIG_ETRAX_SERIAL_FAST_TIMER -static void flush_timeout_function(unsigned long data) -{ - struct e100_serial *info = (struct e100_serial *)data; - - fast_timers[info->line].function = NULL; - serial_fast_timer_expired++; - TIMERD(DEBUG_LOG(info->line, "flush_timout %i ", info->line)); - TIMERD(DEBUG_LOG(info->line, "num expired: %i\n", serial_fast_timer_expired)); - check_flush_timeout(info); -} - -#else - -/* dma fifo/buffer timeout handler - forces an end-of-packet for the dma input channel if no chars - have been received for CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS/100 s. -*/ - -static struct timer_list flush_timer; - -static void -timed_flush_handler(unsigned long ptr) -{ - struct e100_serial *info; - int i; - -#ifdef CONFIG_SVINTO_SIM - return; -#endif - - for (i = 0; i < NR_PORTS; i++) { - info = rs_table + i; - if (info->uses_dma_in) - check_flush_timeout(info); - } - - /* restart flush timer */ - mod_timer(&flush_timer, jiffies + CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS); -} -#endif - -#ifdef SERIAL_HANDLE_EARLY_ERRORS - -/* If there is an error (ie break) when the DMA is running and - * there are no bytes in the fifo the DMA is stopped and we get no - * eop interrupt. Thus we have to monitor the first bytes on a DMA - * transfer, and if it is without error we can turn the serial - * interrupts off. - */ - -/* -BREAK handling on ETRAX 100: -ETRAX will generate interrupt although there is no stop bit between the -characters. - -Depending on how long the break sequence is, the end of the breaksequence -will look differently: -| indicates start/end of a character. - -B= Break character (0x00) with framing error. -E= Error byte with parity error received after B characters. -F= "Faked" valid byte received immediately after B characters. -V= Valid byte - -1. - B BL ___________________________ V -.._|__________|__________| |valid data | - -Multiple frame errors with data == 0x00 (B), -the timing matches up "perfectly" so no extra ending char is detected. -The RXD pin is 1 in the last interrupt, in that case -we set info->errorcode = ERRCODE_INSERT_BREAK, but we can't really -know if another byte will come and this really is case 2. below -(e.g F=0xFF or 0xFE) -If RXD pin is 0 we can expect another character (see 2. below). - - -2. - - B B E or F__________________..__ V -.._|__________|__________|______ | |valid data - "valid" or - parity error - -Multiple frame errors with data == 0x00 (B), -but the part of the break trigs is interpreted as a start bit (and possibly -some 0 bits followed by a number of 1 bits and a stop bit). -Depending on parity settings etc. this last character can be either -a fake "valid" char (F) or have a parity error (E). - -If the character is valid it will be put in the buffer, -we set info->errorcode = ERRCODE_SET_BREAK so the receive interrupt -will set the flags so the tty will handle it, -if it's an error byte it will not be put in the buffer -and we set info->errorcode = ERRCODE_INSERT_BREAK. - -To distinguish a V byte in 1. from an F byte in 2. we keep a timestamp -of the last faulty char (B) and compares it with the current time: -If the time elapsed time is less then 2*char_time_usec we will assume -it's a faked F char and not a Valid char and set -info->errorcode = ERRCODE_SET_BREAK. - -Flaws in the above solution: -~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -We use the timer to distinguish a F character from a V character, -if a V character is to close after the break we might make the wrong decision. - -TODO: The break will be delayed until an F or V character is received. - -*/ - -static -struct e100_serial * handle_ser_rx_interrupt_no_dma(struct e100_serial *info) -{ - unsigned long data_read; - struct tty_struct *tty = info->port.tty; - - if (!tty) { - printk("!NO TTY!\n"); - return info; - } - - /* Read data and status at the same time */ - data_read = *((unsigned long *)&info->ioport[REG_DATA_STATUS32]); -more_data: - if (data_read & IO_MASK(R_SERIAL0_READ, xoff_detect) ) { - DFLOW(DEBUG_LOG(info->line, "XOFF detect\n", 0)); - } - DINTR2(DEBUG_LOG(info->line, "ser_rx %c\n", IO_EXTRACT(R_SERIAL0_READ, data_in, data_read))); - - if (data_read & ( IO_MASK(R_SERIAL0_READ, framing_err) | - IO_MASK(R_SERIAL0_READ, par_err) | - IO_MASK(R_SERIAL0_READ, overrun) )) { - /* An error */ - info->last_rx_active_usec = GET_JIFFIES_USEC(); - info->last_rx_active = jiffies; - DINTR1(DEBUG_LOG(info->line, "ser_rx err stat_data %04X\n", data_read)); - DLOG_INT_TRIG( - if (!log_int_trig1_pos) { - log_int_trig1_pos = log_int_pos; - log_int(rdpc(), 0, 0); - } - ); - - - if ( ((data_read & IO_MASK(R_SERIAL0_READ, data_in)) == 0) && - (data_read & IO_MASK(R_SERIAL0_READ, framing_err)) ) { - /* Most likely a break, but we get interrupts over and - * over again. - */ - - if (!info->break_detected_cnt) { - DEBUG_LOG(info->line, "#BRK start\n", 0); - } - if (data_read & IO_MASK(R_SERIAL0_READ, rxd)) { - /* The RX pin is high now, so the break - * must be over, but.... - * we can't really know if we will get another - * last byte ending the break or not. - * And we don't know if the byte (if any) will - * have an error or look valid. - */ - DEBUG_LOG(info->line, "# BL BRK\n", 0); - info->errorcode = ERRCODE_INSERT_BREAK; - } - info->break_detected_cnt++; - } else { - /* The error does not look like a break, but could be - * the end of one - */ - if (info->break_detected_cnt) { - DEBUG_LOG(info->line, "EBRK %i\n", info->break_detected_cnt); - info->errorcode = ERRCODE_INSERT_BREAK; - } else { - unsigned char data = IO_EXTRACT(R_SERIAL0_READ, - data_in, data_read); - char flag = TTY_NORMAL; - if (info->errorcode == ERRCODE_INSERT_BREAK) { - struct tty_struct *tty = info->port.tty; - tty_insert_flip_char(tty, 0, flag); - info->icount.rx++; - } - - if (data_read & IO_MASK(R_SERIAL0_READ, par_err)) { - info->icount.parity++; - flag = TTY_PARITY; - } else if (data_read & IO_MASK(R_SERIAL0_READ, overrun)) { - info->icount.overrun++; - flag = TTY_OVERRUN; - } else if (data_read & IO_MASK(R_SERIAL0_READ, framing_err)) { - info->icount.frame++; - flag = TTY_FRAME; - } - tty_insert_flip_char(tty, data, flag); - info->errorcode = 0; - } - info->break_detected_cnt = 0; - } - } else if (data_read & IO_MASK(R_SERIAL0_READ, data_avail)) { - /* No error */ - DLOG_INT_TRIG( - if (!log_int_trig1_pos) { - if (log_int_pos >= log_int_size) { - log_int_pos = 0; - } - log_int_trig0_pos = log_int_pos; - log_int(rdpc(), 0, 0); - } - ); - tty_insert_flip_char(tty, - IO_EXTRACT(R_SERIAL0_READ, data_in, data_read), - TTY_NORMAL); - } else { - DEBUG_LOG(info->line, "ser_rx int but no data_avail %08lX\n", data_read); - } - - - info->icount.rx++; - data_read = *((unsigned long *)&info->ioport[REG_DATA_STATUS32]); - if (data_read & IO_MASK(R_SERIAL0_READ, data_avail)) { - DEBUG_LOG(info->line, "ser_rx %c in loop\n", IO_EXTRACT(R_SERIAL0_READ, data_in, data_read)); - goto more_data; - } - - tty_flip_buffer_push(info->port.tty); - return info; -} - -static struct e100_serial* handle_ser_rx_interrupt(struct e100_serial *info) -{ - unsigned char rstat; - -#ifdef SERIAL_DEBUG_INTR - printk("Interrupt from serport %d\n", i); -#endif -/* DEBUG_LOG(info->line, "ser_interrupt stat %03X\n", rstat | (i << 8)); */ - if (!info->uses_dma_in) { - return handle_ser_rx_interrupt_no_dma(info); - } - /* DMA is used */ - rstat = info->ioport[REG_STATUS]; - if (rstat & IO_MASK(R_SERIAL0_STATUS, xoff_detect) ) { - DFLOW(DEBUG_LOG(info->line, "XOFF detect\n", 0)); - } - - if (rstat & SER_ERROR_MASK) { - unsigned char data; - - info->last_rx_active_usec = GET_JIFFIES_USEC(); - info->last_rx_active = jiffies; - /* If we got an error, we must reset it by reading the - * data_in field - */ - data = info->ioport[REG_DATA]; - DINTR1(DEBUG_LOG(info->line, "ser_rx! %c\n", data)); - DINTR1(DEBUG_LOG(info->line, "ser_rx err stat %02X\n", rstat)); - if (!data && (rstat & SER_FRAMING_ERR_MASK)) { - /* Most likely a break, but we get interrupts over and - * over again. - */ - - if (!info->break_detected_cnt) { - DEBUG_LOG(info->line, "#BRK start\n", 0); - } - if (rstat & SER_RXD_MASK) { - /* The RX pin is high now, so the break - * must be over, but.... - * we can't really know if we will get another - * last byte ending the break or not. - * And we don't know if the byte (if any) will - * have an error or look valid. - */ - DEBUG_LOG(info->line, "# BL BRK\n", 0); - info->errorcode = ERRCODE_INSERT_BREAK; - } - info->break_detected_cnt++; - } else { - /* The error does not look like a break, but could be - * the end of one - */ - if (info->break_detected_cnt) { - DEBUG_LOG(info->line, "EBRK %i\n", info->break_detected_cnt); - info->errorcode = ERRCODE_INSERT_BREAK; - } else { - if (info->errorcode == ERRCODE_INSERT_BREAK) { - info->icount.brk++; - add_char_and_flag(info, '\0', TTY_BREAK); - } - - if (rstat & SER_PAR_ERR_MASK) { - info->icount.parity++; - add_char_and_flag(info, data, TTY_PARITY); - } else if (rstat & SER_OVERRUN_MASK) { - info->icount.overrun++; - add_char_and_flag(info, data, TTY_OVERRUN); - } else if (rstat & SER_FRAMING_ERR_MASK) { - info->icount.frame++; - add_char_and_flag(info, data, TTY_FRAME); - } - - info->errorcode = 0; - } - info->break_detected_cnt = 0; - DEBUG_LOG(info->line, "#iERR s d %04X\n", - ((rstat & SER_ERROR_MASK) << 8) | data); - } - PROCSTAT(ser_stat[info->line].early_errors_cnt++); - } else { /* It was a valid byte, now let the DMA do the rest */ - unsigned long curr_time_u = GET_JIFFIES_USEC(); - unsigned long curr_time = jiffies; - - if (info->break_detected_cnt) { - /* Detect if this character is a new valid char or the - * last char in a break sequence: If LSBits are 0 and - * MSBits are high AND the time is close to the - * previous interrupt we should discard it. - */ - long elapsed_usec = - (curr_time - info->last_rx_active) * (1000000/HZ) + - curr_time_u - info->last_rx_active_usec; - if (elapsed_usec < 2*info->char_time_usec) { - DEBUG_LOG(info->line, "FBRK %i\n", info->line); - /* Report as BREAK (error) and let - * receive_chars_dma() handle it - */ - info->errorcode = ERRCODE_SET_BREAK; - } else { - DEBUG_LOG(info->line, "Not end of BRK (V)%i\n", info->line); - } - DEBUG_LOG(info->line, "num brk %i\n", info->break_detected_cnt); - } - -#ifdef SERIAL_DEBUG_INTR - printk("** OK, disabling ser_interrupts\n"); -#endif - e100_disable_serial_data_irq(info); - DINTR2(DEBUG_LOG(info->line, "ser_rx OK %d\n", info->line)); - info->break_detected_cnt = 0; - - PROCSTAT(ser_stat[info->line].ser_ints_ok_cnt++); - } - /* Restarting the DMA never hurts */ - *info->icmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, restart); - START_FLUSH_FAST_TIMER(info, "ser_int"); - return info; -} /* handle_ser_rx_interrupt */ - -static void handle_ser_tx_interrupt(struct e100_serial *info) -{ - unsigned long flags; - - if (info->x_char) { - unsigned char rstat; - DFLOW(DEBUG_LOG(info->line, "tx_int: xchar 0x%02X\n", info->x_char)); - local_irq_save(flags); - rstat = info->ioport[REG_STATUS]; - DFLOW(DEBUG_LOG(info->line, "stat %x\n", rstat)); - - info->ioport[REG_TR_DATA] = info->x_char; - info->icount.tx++; - info->x_char = 0; - /* We must enable since it is disabled in ser_interrupt */ - e100_enable_serial_tx_ready_irq(info); - local_irq_restore(flags); - return; - } - if (info->uses_dma_out) { - unsigned char rstat; - int i; - /* We only use normal tx interrupt when sending x_char */ - DFLOW(DEBUG_LOG(info->line, "tx_int: xchar sent\n", 0)); - local_irq_save(flags); - rstat = info->ioport[REG_STATUS]; - DFLOW(DEBUG_LOG(info->line, "stat %x\n", rstat)); - e100_disable_serial_tx_ready_irq(info); - if (info->port.tty->stopped) - rs_stop(info->port.tty); - /* Enable the DMA channel and tell it to continue */ - e100_enable_txdma_channel(info); - /* Wait 12 cycles before doing the DMA command */ - for(i = 6; i > 0; i--) - nop(); - - *info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, continue); - local_irq_restore(flags); - return; - } - /* Normal char-by-char interrupt */ - if (info->xmit.head == info->xmit.tail - || info->port.tty->stopped - || info->port.tty->hw_stopped) { - DFLOW(DEBUG_LOG(info->line, "tx_int: stopped %i\n", - info->port.tty->stopped)); - e100_disable_serial_tx_ready_irq(info); - info->tr_running = 0; - return; - } - DINTR2(DEBUG_LOG(info->line, "tx_int %c\n", info->xmit.buf[info->xmit.tail])); - /* Send a byte, rs485 timing is critical so turn of ints */ - local_irq_save(flags); - info->ioport[REG_TR_DATA] = info->xmit.buf[info->xmit.tail]; - info->xmit.tail = (info->xmit.tail + 1) & (SERIAL_XMIT_SIZE-1); - info->icount.tx++; - if (info->xmit.head == info->xmit.tail) { -#if defined(CONFIG_ETRAX_RS485) && defined(CONFIG_ETRAX_FAST_TIMER) - if (info->rs485.flags & SER_RS485_ENABLED) { - /* Set a short timer to toggle RTS */ - start_one_shot_timer(&fast_timers_rs485[info->line], - rs485_toggle_rts_timer_function, - (unsigned long)info, - info->char_time_usec*2, - "RS-485"); - } -#endif /* RS485 */ - info->last_tx_active_usec = GET_JIFFIES_USEC(); - info->last_tx_active = jiffies; - e100_disable_serial_tx_ready_irq(info); - info->tr_running = 0; - DFLOW(DEBUG_LOG(info->line, "tx_int: stop2\n", 0)); - } else { - /* We must enable since it is disabled in ser_interrupt */ - e100_enable_serial_tx_ready_irq(info); - } - local_irq_restore(flags); - - if (CIRC_CNT(info->xmit.head, - info->xmit.tail, - SERIAL_XMIT_SIZE) < WAKEUP_CHARS) - rs_sched_event(info, RS_EVENT_WRITE_WAKEUP); - -} /* handle_ser_tx_interrupt */ - -/* result of time measurements: - * RX duration 54-60 us when doing something, otherwise 6-9 us - * ser_int duration: just sending: 8-15 us normally, up to 73 us - */ -static irqreturn_t -ser_interrupt(int irq, void *dev_id) -{ - static volatile int tx_started = 0; - struct e100_serial *info; - int i; - unsigned long flags; - unsigned long irq_mask1_rd; - unsigned long data_mask = (1 << (8+2*0)); /* ser0 data_avail */ - int handled = 0; - static volatile unsigned long reentered_ready_mask = 0; - - local_irq_save(flags); - irq_mask1_rd = *R_IRQ_MASK1_RD; - /* First handle all rx interrupts with ints disabled */ - info = rs_table; - irq_mask1_rd &= e100_ser_int_mask; - for (i = 0; i < NR_PORTS; i++) { - /* Which line caused the data irq? */ - if (irq_mask1_rd & data_mask) { - handled = 1; - handle_ser_rx_interrupt(info); - } - info += 1; - data_mask <<= 2; - } - /* Handle tx interrupts with interrupts enabled so we - * can take care of new data interrupts while transmitting - * We protect the tx part with the tx_started flag. - * We disable the tr_ready interrupts we are about to handle and - * unblock the serial interrupt so new serial interrupts may come. - * - * If we get a new interrupt: - * - it migth be due to synchronous serial ports. - * - serial irq will be blocked by general irq handler. - * - async data will be handled above (sync will be ignored). - * - tx_started flag will prevent us from trying to send again and - * we will exit fast - no need to unblock serial irq. - * - Next (sync) serial interrupt handler will be runned with - * disabled interrupt due to restore_flags() at end of function, - * so sync handler will not be preempted or reentered. - */ - if (!tx_started) { - unsigned long ready_mask; - unsigned long - tx_started = 1; - /* Only the tr_ready interrupts left */ - irq_mask1_rd &= (IO_MASK(R_IRQ_MASK1_RD, ser0_ready) | - IO_MASK(R_IRQ_MASK1_RD, ser1_ready) | - IO_MASK(R_IRQ_MASK1_RD, ser2_ready) | - IO_MASK(R_IRQ_MASK1_RD, ser3_ready)); - while (irq_mask1_rd) { - /* Disable those we are about to handle */ - *R_IRQ_MASK1_CLR = irq_mask1_rd; - /* Unblock the serial interrupt */ - *R_VECT_MASK_SET = IO_STATE(R_VECT_MASK_SET, serial, set); - - local_irq_enable(); - ready_mask = (1 << (8+1+2*0)); /* ser0 tr_ready */ - info = rs_table; - for (i = 0; i < NR_PORTS; i++) { - /* Which line caused the ready irq? */ - if (irq_mask1_rd & ready_mask) { - handled = 1; - handle_ser_tx_interrupt(info); - } - info += 1; - ready_mask <<= 2; - } - /* handle_ser_tx_interrupt enables tr_ready interrupts */ - local_irq_disable(); - /* Handle reentered TX interrupt */ - irq_mask1_rd = reentered_ready_mask; - } - local_irq_disable(); - tx_started = 0; - } else { - unsigned long ready_mask; - ready_mask = irq_mask1_rd & (IO_MASK(R_IRQ_MASK1_RD, ser0_ready) | - IO_MASK(R_IRQ_MASK1_RD, ser1_ready) | - IO_MASK(R_IRQ_MASK1_RD, ser2_ready) | - IO_MASK(R_IRQ_MASK1_RD, ser3_ready)); - if (ready_mask) { - reentered_ready_mask |= ready_mask; - /* Disable those we are about to handle */ - *R_IRQ_MASK1_CLR = ready_mask; - DFLOW(DEBUG_LOG(SERIAL_DEBUG_LINE, "ser_int reentered with TX %X\n", ready_mask)); - } - } - - local_irq_restore(flags); - return IRQ_RETVAL(handled); -} /* ser_interrupt */ -#endif - -/* - * ------------------------------------------------------------------- - * Here ends the serial interrupt routines. - * ------------------------------------------------------------------- - */ - -/* - * This routine is used to handle the "bottom half" processing for the - * serial driver, known also the "software interrupt" processing. - * This processing is done at the kernel interrupt level, after the - * rs_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This - * is where time-consuming activities which can not be done in the - * interrupt driver proper are done; the interrupt driver schedules - * them using rs_sched_event(), and they get done here. - */ -static void -do_softint(struct work_struct *work) -{ - struct e100_serial *info; - struct tty_struct *tty; - - info = container_of(work, struct e100_serial, work); - - tty = info->port.tty; - if (!tty) - return; - - if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) - tty_wakeup(tty); -} - -static int -startup(struct e100_serial * info) -{ - unsigned long flags; - unsigned long xmit_page; - int i; - - xmit_page = get_zeroed_page(GFP_KERNEL); - if (!xmit_page) - return -ENOMEM; - - local_irq_save(flags); - - /* if it was already initialized, skip this */ - - if (info->flags & ASYNC_INITIALIZED) { - local_irq_restore(flags); - free_page(xmit_page); - return 0; - } - - if (info->xmit.buf) - free_page(xmit_page); - else - info->xmit.buf = (unsigned char *) xmit_page; - -#ifdef SERIAL_DEBUG_OPEN - printk("starting up ttyS%d (xmit_buf 0x%p)...\n", info->line, info->xmit.buf); -#endif - -#ifdef CONFIG_SVINTO_SIM - /* Bits and pieces collected from below. Better to have them - in one ifdef:ed clause than to mix in a lot of ifdefs, - right? */ - if (info->port.tty) - clear_bit(TTY_IO_ERROR, &info->port.tty->flags); - - info->xmit.head = info->xmit.tail = 0; - info->first_recv_buffer = info->last_recv_buffer = NULL; - info->recv_cnt = info->max_recv_cnt = 0; - - for (i = 0; i < SERIAL_RECV_DESCRIPTORS; i++) - info->rec_descr[i].buf = NULL; - - /* No real action in the simulator, but may set info important - to ioctl. */ - change_speed(info); -#else - - /* - * Clear the FIFO buffers and disable them - * (they will be reenabled in change_speed()) - */ - - /* - * Reset the DMA channels and make sure their interrupts are cleared - */ - - if (info->dma_in_enabled) { - info->uses_dma_in = 1; - e100_enable_rxdma_channel(info); - - *info->icmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, reset); - - /* Wait until reset cycle is complete */ - while (IO_EXTRACT(R_DMA_CH6_CMD, cmd, *info->icmdadr) == - IO_STATE_VALUE(R_DMA_CH6_CMD, cmd, reset)); - - /* Make sure the irqs are cleared */ - *info->iclrintradr = - IO_STATE(R_DMA_CH6_CLR_INTR, clr_descr, do) | - IO_STATE(R_DMA_CH6_CLR_INTR, clr_eop, do); - } else { - e100_disable_rxdma_channel(info); - } - - if (info->dma_out_enabled) { - info->uses_dma_out = 1; - e100_enable_txdma_channel(info); - *info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, reset); - - while (IO_EXTRACT(R_DMA_CH6_CMD, cmd, *info->ocmdadr) == - IO_STATE_VALUE(R_DMA_CH6_CMD, cmd, reset)); - - /* Make sure the irqs are cleared */ - *info->oclrintradr = - IO_STATE(R_DMA_CH6_CLR_INTR, clr_descr, do) | - IO_STATE(R_DMA_CH6_CLR_INTR, clr_eop, do); - } else { - e100_disable_txdma_channel(info); - } - - if (info->port.tty) - clear_bit(TTY_IO_ERROR, &info->port.tty->flags); - - info->xmit.head = info->xmit.tail = 0; - info->first_recv_buffer = info->last_recv_buffer = NULL; - info->recv_cnt = info->max_recv_cnt = 0; - - for (i = 0; i < SERIAL_RECV_DESCRIPTORS; i++) - info->rec_descr[i].buf = 0; - - /* - * and set the speed and other flags of the serial port - * this will start the rx/tx as well - */ -#ifdef SERIAL_HANDLE_EARLY_ERRORS - e100_enable_serial_data_irq(info); -#endif - change_speed(info); - - /* dummy read to reset any serial errors */ - - (void)info->ioport[REG_DATA]; - - /* enable the interrupts */ - if (info->uses_dma_out) - e100_enable_txdma_irq(info); - - e100_enable_rx_irq(info); - - info->tr_running = 0; /* to be sure we don't lock up the transmitter */ - - /* setup the dma input descriptor and start dma */ - - start_receive(info); - - /* for safety, make sure the descriptors last result is 0 bytes written */ - - info->tr_descr.sw_len = 0; - info->tr_descr.hw_len = 0; - info->tr_descr.status = 0; - - /* enable RTS/DTR last */ - - e100_rts(info, 1); - e100_dtr(info, 1); - -#endif /* CONFIG_SVINTO_SIM */ - - info->flags |= ASYNC_INITIALIZED; - - local_irq_restore(flags); - return 0; -} - -/* - * This routine will shutdown a serial port; interrupts are disabled, and - * DTR is dropped if the hangup on close termio flag is on. - */ -static void -shutdown(struct e100_serial * info) -{ - unsigned long flags; - struct etrax_dma_descr *descr = info->rec_descr; - struct etrax_recv_buffer *buffer; - int i; - -#ifndef CONFIG_SVINTO_SIM - /* shut down the transmitter and receiver */ - DFLOW(DEBUG_LOG(info->line, "shutdown %i\n", info->line)); - e100_disable_rx(info); - info->ioport[REG_TR_CTRL] = (info->tx_ctrl &= ~0x40); - - /* disable interrupts, reset dma channels */ - if (info->uses_dma_in) { - e100_disable_rxdma_irq(info); - *info->icmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, reset); - info->uses_dma_in = 0; - } else { - e100_disable_serial_data_irq(info); - } - - if (info->uses_dma_out) { - e100_disable_txdma_irq(info); - info->tr_running = 0; - *info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, reset); - info->uses_dma_out = 0; - } else { - e100_disable_serial_tx_ready_irq(info); - info->tr_running = 0; - } - -#endif /* CONFIG_SVINTO_SIM */ - - if (!(info->flags & ASYNC_INITIALIZED)) - return; - -#ifdef SERIAL_DEBUG_OPEN - printk("Shutting down serial port %d (irq %d)....\n", info->line, - info->irq); -#endif - - local_irq_save(flags); - - if (info->xmit.buf) { - free_page((unsigned long)info->xmit.buf); - info->xmit.buf = NULL; - } - - for (i = 0; i < SERIAL_RECV_DESCRIPTORS; i++) - if (descr[i].buf) { - buffer = phys_to_virt(descr[i].buf) - sizeof *buffer; - kfree(buffer); - descr[i].buf = 0; - } - - if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) { - /* hang up DTR and RTS if HUPCL is enabled */ - e100_dtr(info, 0); - e100_rts(info, 0); /* could check CRTSCTS before doing this */ - } - - if (info->port.tty) - set_bit(TTY_IO_ERROR, &info->port.tty->flags); - - info->flags &= ~ASYNC_INITIALIZED; - local_irq_restore(flags); -} - - -/* change baud rate and other assorted parameters */ - -static void -change_speed(struct e100_serial *info) -{ - unsigned int cflag; - unsigned long xoff; - unsigned long flags; - /* first some safety checks */ - - if (!info->port.tty || !info->port.tty->termios) - return; - if (!info->ioport) - return; - - cflag = info->port.tty->termios->c_cflag; - - /* possibly, the tx/rx should be disabled first to do this safely */ - - /* change baud-rate and write it to the hardware */ - if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) { - /* Special baudrate */ - u32 mask = 0xFF << (info->line*8); /* Each port has 8 bits */ - unsigned long alt_source = - IO_STATE(R_ALT_SER_BAUDRATE, ser0_rec, normal) | - IO_STATE(R_ALT_SER_BAUDRATE, ser0_tr, normal); - /* R_ALT_SER_BAUDRATE selects the source */ - DBAUD(printk("Custom baudrate: baud_base/divisor %lu/%i\n", - (unsigned long)info->baud_base, info->custom_divisor)); - if (info->baud_base == SERIAL_PRESCALE_BASE) { - /* 0, 2-65535 (0=65536) */ - u16 divisor = info->custom_divisor; - /* R_SERIAL_PRESCALE (upper 16 bits of R_CLOCK_PRESCALE) */ - /* baudrate is 3.125MHz/custom_divisor */ - alt_source = - IO_STATE(R_ALT_SER_BAUDRATE, ser0_rec, prescale) | - IO_STATE(R_ALT_SER_BAUDRATE, ser0_tr, prescale); - alt_source = 0x11; - DBAUD(printk("Writing SERIAL_PRESCALE: divisor %i\n", divisor)); - *R_SERIAL_PRESCALE = divisor; - info->baud = SERIAL_PRESCALE_BASE/divisor; - } -#ifdef CONFIG_ETRAX_EXTERN_PB6CLK_ENABLED - else if ((info->baud_base==CONFIG_ETRAX_EXTERN_PB6CLK_FREQ/8 && - info->custom_divisor == 1) || - (info->baud_base==CONFIG_ETRAX_EXTERN_PB6CLK_FREQ && - info->custom_divisor == 8)) { - /* ext_clk selected */ - alt_source = - IO_STATE(R_ALT_SER_BAUDRATE, ser0_rec, extern) | - IO_STATE(R_ALT_SER_BAUDRATE, ser0_tr, extern); - DBAUD(printk("using external baudrate: %lu\n", CONFIG_ETRAX_EXTERN_PB6CLK_FREQ/8)); - info->baud = CONFIG_ETRAX_EXTERN_PB6CLK_FREQ/8; - } -#endif - else - { - /* Bad baudbase, we don't support using timer0 - * for baudrate. - */ - printk(KERN_WARNING "Bad baud_base/custom_divisor: %lu/%i\n", - (unsigned long)info->baud_base, info->custom_divisor); - } - r_alt_ser_baudrate_shadow &= ~mask; - r_alt_ser_baudrate_shadow |= (alt_source << (info->line*8)); - *R_ALT_SER_BAUDRATE = r_alt_ser_baudrate_shadow; - } else { - /* Normal baudrate */ - /* Make sure we use normal baudrate */ - u32 mask = 0xFF << (info->line*8); /* Each port has 8 bits */ - unsigned long alt_source = - IO_STATE(R_ALT_SER_BAUDRATE, ser0_rec, normal) | - IO_STATE(R_ALT_SER_BAUDRATE, ser0_tr, normal); - r_alt_ser_baudrate_shadow &= ~mask; - r_alt_ser_baudrate_shadow |= (alt_source << (info->line*8)); -#ifndef CONFIG_SVINTO_SIM - *R_ALT_SER_BAUDRATE = r_alt_ser_baudrate_shadow; -#endif /* CONFIG_SVINTO_SIM */ - - info->baud = cflag_to_baud(cflag); -#ifndef CONFIG_SVINTO_SIM - info->ioport[REG_BAUD] = cflag_to_etrax_baud(cflag); -#endif /* CONFIG_SVINTO_SIM */ - } - -#ifndef CONFIG_SVINTO_SIM - /* start with default settings and then fill in changes */ - local_irq_save(flags); - /* 8 bit, no/even parity */ - info->rx_ctrl &= ~(IO_MASK(R_SERIAL0_REC_CTRL, rec_bitnr) | - IO_MASK(R_SERIAL0_REC_CTRL, rec_par_en) | - IO_MASK(R_SERIAL0_REC_CTRL, rec_par)); - - /* 8 bit, no/even parity, 1 stop bit, no cts */ - info->tx_ctrl &= ~(IO_MASK(R_SERIAL0_TR_CTRL, tr_bitnr) | - IO_MASK(R_SERIAL0_TR_CTRL, tr_par_en) | - IO_MASK(R_SERIAL0_TR_CTRL, tr_par) | - IO_MASK(R_SERIAL0_TR_CTRL, stop_bits) | - IO_MASK(R_SERIAL0_TR_CTRL, auto_cts)); - - if ((cflag & CSIZE) == CS7) { - /* set 7 bit mode */ - info->tx_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, tr_bitnr, tr_7bit); - info->rx_ctrl |= IO_STATE(R_SERIAL0_REC_CTRL, rec_bitnr, rec_7bit); - } - - if (cflag & CSTOPB) { - /* set 2 stop bit mode */ - info->tx_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, stop_bits, two_bits); - } - - if (cflag & PARENB) { - /* enable parity */ - info->tx_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, tr_par_en, enable); - info->rx_ctrl |= IO_STATE(R_SERIAL0_REC_CTRL, rec_par_en, enable); - } - - if (cflag & CMSPAR) { - /* enable stick parity, PARODD mean Mark which matches ETRAX */ - info->tx_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, tr_stick_par, stick); - info->rx_ctrl |= IO_STATE(R_SERIAL0_REC_CTRL, rec_stick_par, stick); - } - if (cflag & PARODD) { - /* set odd parity (or Mark if CMSPAR) */ - info->tx_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, tr_par, odd); - info->rx_ctrl |= IO_STATE(R_SERIAL0_REC_CTRL, rec_par, odd); - } - - if (cflag & CRTSCTS) { - /* enable automatic CTS handling */ - DFLOW(DEBUG_LOG(info->line, "FLOW auto_cts enabled\n", 0)); - info->tx_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, auto_cts, active); - } - - /* make sure the tx and rx are enabled */ - - info->tx_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, tr_enable, enable); - info->rx_ctrl |= IO_STATE(R_SERIAL0_REC_CTRL, rec_enable, enable); - - /* actually write the control regs to the hardware */ - - info->ioport[REG_TR_CTRL] = info->tx_ctrl; - info->ioport[REG_REC_CTRL] = info->rx_ctrl; - xoff = IO_FIELD(R_SERIAL0_XOFF, xoff_char, STOP_CHAR(info->port.tty)); - xoff |= IO_STATE(R_SERIAL0_XOFF, tx_stop, enable); - if (info->port.tty->termios->c_iflag & IXON ) { - DFLOW(DEBUG_LOG(info->line, "FLOW XOFF enabled 0x%02X\n", - STOP_CHAR(info->port.tty))); - xoff |= IO_STATE(R_SERIAL0_XOFF, auto_xoff, enable); - } - - *((unsigned long *)&info->ioport[REG_XOFF]) = xoff; - local_irq_restore(flags); -#endif /* !CONFIG_SVINTO_SIM */ - - update_char_time(info); - -} /* change_speed */ - -/* start transmitting chars NOW */ - -static void -rs_flush_chars(struct tty_struct *tty) -{ - struct e100_serial *info = (struct e100_serial *)tty->driver_data; - unsigned long flags; - - if (info->tr_running || - info->xmit.head == info->xmit.tail || - tty->stopped || - tty->hw_stopped || - !info->xmit.buf) - return; - -#ifdef SERIAL_DEBUG_FLOW - printk("rs_flush_chars\n"); -#endif - - /* this protection might not exactly be necessary here */ - - local_irq_save(flags); - start_transmit(info); - local_irq_restore(flags); -} - -static int rs_raw_write(struct tty_struct *tty, - const unsigned char *buf, int count) -{ - int c, ret = 0; - struct e100_serial *info = (struct e100_serial *)tty->driver_data; - unsigned long flags; - - /* first some sanity checks */ - - if (!tty || !info->xmit.buf || !tmp_buf) - return 0; - -#ifdef SERIAL_DEBUG_DATA - if (info->line == SERIAL_DEBUG_LINE) - printk("rs_raw_write (%d), status %d\n", - count, info->ioport[REG_STATUS]); -#endif - -#ifdef CONFIG_SVINTO_SIM - /* Really simple. The output is here and now. */ - SIMCOUT(buf, count); - return count; -#endif - local_save_flags(flags); - DFLOW(DEBUG_LOG(info->line, "write count %i ", count)); - DFLOW(DEBUG_LOG(info->line, "ldisc %i\n", tty->ldisc.chars_in_buffer(tty))); - - - /* The local_irq_disable/restore_flags pairs below are needed - * because the DMA interrupt handler moves the info->xmit values. - * the memcpy needs to be in the critical region unfortunately, - * because we need to read xmit values, memcpy, write xmit values - * in one atomic operation... this could perhaps be avoided by - * more clever design. - */ - local_irq_disable(); - while (count) { - c = CIRC_SPACE_TO_END(info->xmit.head, - info->xmit.tail, - SERIAL_XMIT_SIZE); - - if (count < c) - c = count; - if (c <= 0) - break; - - memcpy(info->xmit.buf + info->xmit.head, buf, c); - info->xmit.head = (info->xmit.head + c) & - (SERIAL_XMIT_SIZE-1); - buf += c; - count -= c; - ret += c; - } - local_irq_restore(flags); - - /* enable transmitter if not running, unless the tty is stopped - * this does not need IRQ protection since if tr_running == 0 - * the IRQ's are not running anyway for this port. - */ - DFLOW(DEBUG_LOG(info->line, "write ret %i\n", ret)); - - if (info->xmit.head != info->xmit.tail && - !tty->stopped && - !tty->hw_stopped && - !info->tr_running) { - start_transmit(info); - } - - return ret; -} /* raw_raw_write() */ - -static int -rs_write(struct tty_struct *tty, - const unsigned char *buf, int count) -{ -#if defined(CONFIG_ETRAX_RS485) - struct e100_serial *info = (struct e100_serial *)tty->driver_data; - - if (info->rs485.flags & SER_RS485_ENABLED) - { - /* If we are in RS-485 mode, we need to toggle RTS and disable - * the receiver before initiating a DMA transfer - */ -#ifdef CONFIG_ETRAX_FAST_TIMER - /* Abort any started timer */ - fast_timers_rs485[info->line].function = NULL; - del_fast_timer(&fast_timers_rs485[info->line]); -#endif - e100_rts(info, (info->rs485.flags & SER_RS485_RTS_ON_SEND)); -#if defined(CONFIG_ETRAX_RS485_DISABLE_RECEIVER) - e100_disable_rx(info); - e100_enable_rx_irq(info); -#endif - if ((info->rs485.flags & SER_RS485_RTS_BEFORE_SEND) && - (info->rs485.delay_rts_before_send > 0)) - msleep(info->rs485.delay_rts_before_send); - } -#endif /* CONFIG_ETRAX_RS485 */ - - count = rs_raw_write(tty, buf, count); - -#if defined(CONFIG_ETRAX_RS485) - if (info->rs485.flags & SER_RS485_ENABLED) - { - unsigned int val; - /* If we are in RS-485 mode the following has to be done: - * wait until DMA is ready - * wait on transmit shift register - * toggle RTS - * enable the receiver - */ - - /* Sleep until all sent */ - tty_wait_until_sent(tty, 0); -#ifdef CONFIG_ETRAX_FAST_TIMER - /* Now sleep a little more so that shift register is empty */ - schedule_usleep(info->char_time_usec * 2); -#endif - /* wait on transmit shift register */ - do{ - get_lsr_info(info, &val); - }while (!(val & TIOCSER_TEMT)); - - e100_rts(info, (info->rs485.flags & SER_RS485_RTS_AFTER_SEND)); - -#if defined(CONFIG_ETRAX_RS485_DISABLE_RECEIVER) - e100_enable_rx(info); - e100_enable_rxdma_irq(info); -#endif - } -#endif /* CONFIG_ETRAX_RS485 */ - - return count; -} /* rs_write */ - - -/* how much space is available in the xmit buffer? */ - -static int -rs_write_room(struct tty_struct *tty) -{ - struct e100_serial *info = (struct e100_serial *)tty->driver_data; - - return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE); -} - -/* How many chars are in the xmit buffer? - * This does not include any chars in the transmitter FIFO. - * Use wait_until_sent for waiting for FIFO drain. - */ - -static int -rs_chars_in_buffer(struct tty_struct *tty) -{ - struct e100_serial *info = (struct e100_serial *)tty->driver_data; - - return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE); -} - -/* discard everything in the xmit buffer */ - -static void -rs_flush_buffer(struct tty_struct *tty) -{ - struct e100_serial *info = (struct e100_serial *)tty->driver_data; - unsigned long flags; - - local_irq_save(flags); - info->xmit.head = info->xmit.tail = 0; - local_irq_restore(flags); - - tty_wakeup(tty); -} - -/* - * This function is used to send a high-priority XON/XOFF character to - * the device - * - * Since we use DMA we don't check for info->x_char in transmit_chars_dma(), - * but we do it in handle_ser_tx_interrupt(). - * We disable DMA channel and enable tx ready interrupt and write the - * character when possible. - */ -static void rs_send_xchar(struct tty_struct *tty, char ch) -{ - struct e100_serial *info = (struct e100_serial *)tty->driver_data; - unsigned long flags; - local_irq_save(flags); - if (info->uses_dma_out) { - /* Put the DMA on hold and disable the channel */ - *info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, hold); - while (IO_EXTRACT(R_DMA_CH6_CMD, cmd, *info->ocmdadr) != - IO_STATE_VALUE(R_DMA_CH6_CMD, cmd, hold)); - e100_disable_txdma_channel(info); - } - - /* Must make sure transmitter is not stopped before we can transmit */ - if (tty->stopped) - rs_start(tty); - - /* Enable manual transmit interrupt and send from there */ - DFLOW(DEBUG_LOG(info->line, "rs_send_xchar 0x%02X\n", ch)); - info->x_char = ch; - e100_enable_serial_tx_ready_irq(info); - local_irq_restore(flags); -} - -/* - * ------------------------------------------------------------ - * rs_throttle() - * - * This routine is called by the upper-layer tty layer to signal that - * incoming characters should be throttled. - * ------------------------------------------------------------ - */ -static void -rs_throttle(struct tty_struct * tty) -{ - struct e100_serial *info = (struct e100_serial *)tty->driver_data; -#ifdef SERIAL_DEBUG_THROTTLE - char buf[64]; - - printk("throttle %s: %lu....\n", tty_name(tty, buf), - (unsigned long)tty->ldisc.chars_in_buffer(tty)); -#endif - DFLOW(DEBUG_LOG(info->line,"rs_throttle %lu\n", tty->ldisc.chars_in_buffer(tty))); - - /* Do RTS before XOFF since XOFF might take some time */ - if (tty->termios->c_cflag & CRTSCTS) { - /* Turn off RTS line */ - e100_rts(info, 0); - } - if (I_IXOFF(tty)) - rs_send_xchar(tty, STOP_CHAR(tty)); - -} - -static void -rs_unthrottle(struct tty_struct * tty) -{ - struct e100_serial *info = (struct e100_serial *)tty->driver_data; -#ifdef SERIAL_DEBUG_THROTTLE - char buf[64]; - - printk("unthrottle %s: %lu....\n", tty_name(tty, buf), - (unsigned long)tty->ldisc.chars_in_buffer(tty)); -#endif - DFLOW(DEBUG_LOG(info->line,"rs_unthrottle ldisc %d\n", tty->ldisc.chars_in_buffer(tty))); - DFLOW(DEBUG_LOG(info->line,"rs_unthrottle flip.count: %i\n", tty->flip.count)); - /* Do RTS before XOFF since XOFF might take some time */ - if (tty->termios->c_cflag & CRTSCTS) { - /* Assert RTS line */ - e100_rts(info, 1); - } - - if (I_IXOFF(tty)) { - if (info->x_char) - info->x_char = 0; - else - rs_send_xchar(tty, START_CHAR(tty)); - } - -} - -/* - * ------------------------------------------------------------ - * rs_ioctl() and friends - * ------------------------------------------------------------ - */ - -static int -get_serial_info(struct e100_serial * info, - struct serial_struct * retinfo) -{ - struct serial_struct tmp; - - /* this is all probably wrong, there are a lot of fields - * here that we don't have in e100_serial and maybe we - * should set them to something else than 0. - */ - - if (!retinfo) - return -EFAULT; - memset(&tmp, 0, sizeof(tmp)); - tmp.type = info->type; - tmp.line = info->line; - tmp.port = (int)info->ioport; - tmp.irq = info->irq; - tmp.flags = info->flags; - tmp.baud_base = info->baud_base; - tmp.close_delay = info->close_delay; - tmp.closing_wait = info->closing_wait; - tmp.custom_divisor = info->custom_divisor; - if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) - return -EFAULT; - return 0; -} - -static int -set_serial_info(struct e100_serial *info, - struct serial_struct *new_info) -{ - struct serial_struct new_serial; - struct e100_serial old_info; - int retval = 0; - - if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) - return -EFAULT; - - old_info = *info; - - if (!capable(CAP_SYS_ADMIN)) { - if ((new_serial.type != info->type) || - (new_serial.close_delay != info->close_delay) || - ((new_serial.flags & ~ASYNC_USR_MASK) != - (info->flags & ~ASYNC_USR_MASK))) - return -EPERM; - info->flags = ((info->flags & ~ASYNC_USR_MASK) | - (new_serial.flags & ASYNC_USR_MASK)); - goto check_and_exit; - } - - if (info->count > 1) - return -EBUSY; - - /* - * OK, past this point, all the error checking has been done. - * At this point, we start making changes..... - */ - - info->baud_base = new_serial.baud_base; - info->flags = ((info->flags & ~ASYNC_FLAGS) | - (new_serial.flags & ASYNC_FLAGS)); - info->custom_divisor = new_serial.custom_divisor; - info->type = new_serial.type; - info->close_delay = new_serial.close_delay; - info->closing_wait = new_serial.closing_wait; - info->port.tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; - - check_and_exit: - if (info->flags & ASYNC_INITIALIZED) { - change_speed(info); - } else - retval = startup(info); - return retval; -} - -/* - * get_lsr_info - get line status register info - * - * Purpose: Let user call ioctl() to get info when the UART physically - * is emptied. On bus types like RS485, the transmitter must - * release the bus after transmitting. This must be done when - * the transmit shift register is empty, not be done when the - * transmit holding register is empty. This functionality - * allows an RS485 driver to be written in user space. - */ -static int -get_lsr_info(struct e100_serial * info, unsigned int *value) -{ - unsigned int result = TIOCSER_TEMT; -#ifndef CONFIG_SVINTO_SIM - unsigned long curr_time = jiffies; - unsigned long curr_time_usec = GET_JIFFIES_USEC(); - unsigned long elapsed_usec = - (curr_time - info->last_tx_active) * 1000000/HZ + - curr_time_usec - info->last_tx_active_usec; - - if (info->xmit.head != info->xmit.tail || - elapsed_usec < 2*info->char_time_usec) { - result = 0; - } -#endif - - if (copy_to_user(value, &result, sizeof(int))) - return -EFAULT; - return 0; -} - -#ifdef SERIAL_DEBUG_IO -struct state_str -{ - int state; - const char *str; -}; - -const struct state_str control_state_str[] = { - {TIOCM_DTR, "DTR" }, - {TIOCM_RTS, "RTS"}, - {TIOCM_ST, "ST?" }, - {TIOCM_SR, "SR?" }, - {TIOCM_CTS, "CTS" }, - {TIOCM_CD, "CD" }, - {TIOCM_RI, "RI" }, - {TIOCM_DSR, "DSR" }, - {0, NULL } -}; - -char *get_control_state_str(int MLines, char *s) -{ - int i = 0; - - s[0]='\0'; - while (control_state_str[i].str != NULL) { - if (MLines & control_state_str[i].state) { - if (s[0] != '\0') { - strcat(s, ", "); - } - strcat(s, control_state_str[i].str); - } - i++; - } - return s; -} -#endif - -static int -rs_break(struct tty_struct *tty, int break_state) -{ - struct e100_serial *info = (struct e100_serial *)tty->driver_data; - unsigned long flags; - - if (!info->ioport) - return -EIO; - - local_irq_save(flags); - if (break_state == -1) { - /* Go to manual mode and set the txd pin to 0 */ - /* Clear bit 7 (txd) and 6 (tr_enable) */ - info->tx_ctrl &= 0x3F; - } else { - /* Set bit 7 (txd) and 6 (tr_enable) */ - info->tx_ctrl |= (0x80 | 0x40); - } - info->ioport[REG_TR_CTRL] = info->tx_ctrl; - local_irq_restore(flags); - return 0; -} - -static int -rs_tiocmset(struct tty_struct *tty, struct file *file, - unsigned int set, unsigned int clear) -{ - struct e100_serial *info = (struct e100_serial *)tty->driver_data; - unsigned long flags; - - local_irq_save(flags); - - if (clear & TIOCM_RTS) - e100_rts(info, 0); - if (clear & TIOCM_DTR) - e100_dtr(info, 0); - /* Handle FEMALE behaviour */ - if (clear & TIOCM_RI) - e100_ri_out(info, 0); - if (clear & TIOCM_CD) - e100_cd_out(info, 0); - - if (set & TIOCM_RTS) - e100_rts(info, 1); - if (set & TIOCM_DTR) - e100_dtr(info, 1); - /* Handle FEMALE behaviour */ - if (set & TIOCM_RI) - e100_ri_out(info, 1); - if (set & TIOCM_CD) - e100_cd_out(info, 1); - - local_irq_restore(flags); - return 0; -} - -static int -rs_tiocmget(struct tty_struct *tty, struct file *file) -{ - struct e100_serial *info = (struct e100_serial *)tty->driver_data; - unsigned int result; - unsigned long flags; - - local_irq_save(flags); - - result = - (!E100_RTS_GET(info) ? TIOCM_RTS : 0) - | (!E100_DTR_GET(info) ? TIOCM_DTR : 0) - | (!E100_RI_GET(info) ? TIOCM_RNG : 0) - | (!E100_DSR_GET(info) ? TIOCM_DSR : 0) - | (!E100_CD_GET(info) ? TIOCM_CAR : 0) - | (!E100_CTS_GET(info) ? TIOCM_CTS : 0); - - local_irq_restore(flags); - -#ifdef SERIAL_DEBUG_IO - printk(KERN_DEBUG "ser%i: modem state: %i 0x%08X\n", - info->line, result, result); - { - char s[100]; - - get_control_state_str(result, s); - printk(KERN_DEBUG "state: %s\n", s); - } -#endif - return result; - -} - - -static int -rs_ioctl(struct tty_struct *tty, struct file * file, - unsigned int cmd, unsigned long arg) -{ - struct e100_serial * info = (struct e100_serial *)tty->driver_data; - - if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && - (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) && - (cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT)) { - if (tty->flags & (1 << TTY_IO_ERROR)) - return -EIO; - } - - switch (cmd) { - case TIOCGSERIAL: - return get_serial_info(info, - (struct serial_struct *) arg); - case TIOCSSERIAL: - return set_serial_info(info, - (struct serial_struct *) arg); - case TIOCSERGETLSR: /* Get line status register */ - return get_lsr_info(info, (unsigned int *) arg); - - case TIOCSERGSTRUCT: - if (copy_to_user((struct e100_serial *) arg, - info, sizeof(struct e100_serial))) - return -EFAULT; - return 0; - -#if defined(CONFIG_ETRAX_RS485) - case TIOCSERSETRS485: - { - /* In this ioctl we still use the old structure - * rs485_control for backward compatibility - * (if we use serial_rs485, then old user-level code - * wouldn't work anymore...). - * The use of this ioctl is deprecated: use TIOCSRS485 - * instead.*/ - struct rs485_control rs485ctrl; - struct serial_rs485 rs485data; - printk(KERN_DEBUG "The use of this ioctl is deprecated. Use TIOCSRS485 instead\n"); - if (copy_from_user(&rs485ctrl, (struct rs485_control *)arg, - sizeof(rs485ctrl))) - return -EFAULT; - - rs485data.delay_rts_before_send = rs485ctrl.delay_rts_before_send; - rs485data.flags = 0; - if (rs485data.delay_rts_before_send != 0) - rs485data.flags |= SER_RS485_RTS_BEFORE_SEND; - else - rs485data.flags &= ~(SER_RS485_RTS_BEFORE_SEND); - - if (rs485ctrl.enabled) - rs485data.flags |= SER_RS485_ENABLED; - else - rs485data.flags &= ~(SER_RS485_ENABLED); - - if (rs485ctrl.rts_on_send) - rs485data.flags |= SER_RS485_RTS_ON_SEND; - else - rs485data.flags &= ~(SER_RS485_RTS_ON_SEND); - - if (rs485ctrl.rts_after_sent) - rs485data.flags |= SER_RS485_RTS_AFTER_SEND; - else - rs485data.flags &= ~(SER_RS485_RTS_AFTER_SEND); - - return e100_enable_rs485(tty, &rs485data); - } - - case TIOCSRS485: - { - /* This is the new version of TIOCSRS485, with new - * data structure serial_rs485 */ - struct serial_rs485 rs485data; - if (copy_from_user(&rs485data, (struct rs485_control *)arg, - sizeof(rs485data))) - return -EFAULT; - - return e100_enable_rs485(tty, &rs485data); - } - - case TIOCGRS485: - { - struct serial_rs485 *rs485data = - &(((struct e100_serial *)tty->driver_data)->rs485); - /* This is the ioctl to get RS485 data from user-space */ - if (copy_to_user((struct serial_rs485 *) arg, - rs485data, - sizeof(struct serial_rs485))) - return -EFAULT; - break; - } - - case TIOCSERWRRS485: - { - struct rs485_write rs485wr; - if (copy_from_user(&rs485wr, (struct rs485_write *)arg, - sizeof(rs485wr))) - return -EFAULT; - - return e100_write_rs485(tty, rs485wr.outc, rs485wr.outc_size); - } -#endif - - default: - return -ENOIOCTLCMD; - } - return 0; -} - -static void -rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios) -{ - struct e100_serial *info = (struct e100_serial *)tty->driver_data; - - change_speed(info); - - /* Handle turning off CRTSCTS */ - if ((old_termios->c_cflag & CRTSCTS) && - !(tty->termios->c_cflag & CRTSCTS)) { - tty->hw_stopped = 0; - rs_start(tty); - } - -} - -/* - * ------------------------------------------------------------ - * rs_close() - * - * This routine is called when the serial port gets closed. First, we - * wait for the last remaining data to be sent. Then, we unlink its - * S structure from the interrupt chain if necessary, and we free - * that IRQ if nothing is left in the chain. - * ------------------------------------------------------------ - */ -static void -rs_close(struct tty_struct *tty, struct file * filp) -{ - struct e100_serial * info = (struct e100_serial *)tty->driver_data; - unsigned long flags; - - if (!info) - return; - - /* interrupts are disabled for this entire function */ - - local_irq_save(flags); - - if (tty_hung_up_p(filp)) { - local_irq_restore(flags); - return; - } - -#ifdef SERIAL_DEBUG_OPEN - printk("[%d] rs_close ttyS%d, count = %d\n", current->pid, - info->line, info->count); -#endif - if ((tty->count == 1) && (info->count != 1)) { - /* - * Uh, oh. tty->count is 1, which means that the tty - * structure will be freed. Info->count should always - * be one in these conditions. If it's greater than - * one, we've got real problems, since it means the - * serial port won't be shutdown. - */ - printk(KERN_CRIT - "rs_close: bad serial port count; tty->count is 1, " - "info->count is %d\n", info->count); - info->count = 1; - } - if (--info->count < 0) { - printk(KERN_CRIT "rs_close: bad serial port count for ttyS%d: %d\n", - info->line, info->count); - info->count = 0; - } - if (info->count) { - local_irq_restore(flags); - return; - } - info->flags |= ASYNC_CLOSING; - /* - * Save the termios structure, since this port may have - * separate termios for callout and dialin. - */ - if (info->flags & ASYNC_NORMAL_ACTIVE) - info->normal_termios = *tty->termios; - /* - * Now we wait for the transmit buffer to clear; and we notify - * the line discipline to only process XON/XOFF characters. - */ - tty->closing = 1; - if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) - tty_wait_until_sent(tty, info->closing_wait); - /* - * At this point we stop accepting input. To do this, we - * disable the serial receiver and the DMA receive interrupt. - */ -#ifdef SERIAL_HANDLE_EARLY_ERRORS - e100_disable_serial_data_irq(info); -#endif - -#ifndef CONFIG_SVINTO_SIM - e100_disable_rx(info); - e100_disable_rx_irq(info); - - if (info->flags & ASYNC_INITIALIZED) { - /* - * Before we drop DTR, make sure the UART transmitter - * has completely drained; this is especially - * important as we have a transmit FIFO! - */ - rs_wait_until_sent(tty, HZ); - } -#endif - - shutdown(info); - rs_flush_buffer(tty); - tty_ldisc_flush(tty); - tty->closing = 0; - info->event = 0; - info->port.tty = NULL; - if (info->blocked_open) { - if (info->close_delay) - schedule_timeout_interruptible(info->close_delay); - wake_up_interruptible(&info->open_wait); - } - info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); - wake_up_interruptible(&info->close_wait); - local_irq_restore(flags); - - /* port closed */ - -#if defined(CONFIG_ETRAX_RS485) - if (info->rs485.flags & SER_RS485_ENABLED) { - info->rs485.flags &= ~(SER_RS485_ENABLED); -#if defined(CONFIG_ETRAX_RS485_ON_PA) - *R_PORT_PA_DATA = port_pa_data_shadow &= ~(1 << rs485_pa_bit); -#endif -#if defined(CONFIG_ETRAX_RS485_ON_PORT_G) - REG_SHADOW_SET(R_PORT_G_DATA, port_g_data_shadow, - rs485_port_g_bit, 0); -#endif -#if defined(CONFIG_ETRAX_RS485_LTC1387) - REG_SHADOW_SET(R_PORT_G_DATA, port_g_data_shadow, - CONFIG_ETRAX_RS485_LTC1387_DXEN_PORT_G_BIT, 0); - REG_SHADOW_SET(R_PORT_G_DATA, port_g_data_shadow, - CONFIG_ETRAX_RS485_LTC1387_RXEN_PORT_G_BIT, 0); -#endif - } -#endif - - /* - * Release any allocated DMA irq's. - */ - if (info->dma_in_enabled) { - free_irq(info->dma_in_irq_nbr, info); - cris_free_dma(info->dma_in_nbr, info->dma_in_irq_description); - info->uses_dma_in = 0; -#ifdef SERIAL_DEBUG_OPEN - printk(KERN_DEBUG "DMA irq '%s' freed\n", - info->dma_in_irq_description); -#endif - } - if (info->dma_out_enabled) { - free_irq(info->dma_out_irq_nbr, info); - cris_free_dma(info->dma_out_nbr, info->dma_out_irq_description); - info->uses_dma_out = 0; -#ifdef SERIAL_DEBUG_OPEN - printk(KERN_DEBUG "DMA irq '%s' freed\n", - info->dma_out_irq_description); -#endif - } -} - -/* - * rs_wait_until_sent() --- wait until the transmitter is empty - */ -static void rs_wait_until_sent(struct tty_struct *tty, int timeout) -{ - unsigned long orig_jiffies; - struct e100_serial *info = (struct e100_serial *)tty->driver_data; - unsigned long curr_time = jiffies; - unsigned long curr_time_usec = GET_JIFFIES_USEC(); - long elapsed_usec = - (curr_time - info->last_tx_active) * (1000000/HZ) + - curr_time_usec - info->last_tx_active_usec; - - /* - * Check R_DMA_CHx_STATUS bit 0-6=number of available bytes in FIFO - * R_DMA_CHx_HWSW bit 31-16=nbr of bytes left in DMA buffer (0=64k) - */ - orig_jiffies = jiffies; - while (info->xmit.head != info->xmit.tail || /* More in send queue */ - (*info->ostatusadr & 0x007f) || /* more in FIFO */ - (elapsed_usec < 2*info->char_time_usec)) { - schedule_timeout_interruptible(1); - if (signal_pending(current)) - break; - if (timeout && time_after(jiffies, orig_jiffies + timeout)) - break; - curr_time = jiffies; - curr_time_usec = GET_JIFFIES_USEC(); - elapsed_usec = - (curr_time - info->last_tx_active) * (1000000/HZ) + - curr_time_usec - info->last_tx_active_usec; - } - set_current_state(TASK_RUNNING); -} - -/* - * rs_hangup() --- called by tty_hangup() when a hangup is signaled. - */ -void -rs_hangup(struct tty_struct *tty) -{ - struct e100_serial * info = (struct e100_serial *)tty->driver_data; - - rs_flush_buffer(tty); - shutdown(info); - info->event = 0; - info->count = 0; - info->flags &= ~ASYNC_NORMAL_ACTIVE; - info->port.tty = NULL; - wake_up_interruptible(&info->open_wait); -} - -/* - * ------------------------------------------------------------ - * rs_open() and friends - * ------------------------------------------------------------ - */ -static int -block_til_ready(struct tty_struct *tty, struct file * filp, - struct e100_serial *info) -{ - DECLARE_WAITQUEUE(wait, current); - unsigned long flags; - int retval; - int do_clocal = 0, extra_count = 0; - - /* - * If the device is in the middle of being closed, then block - * until it's done, and then try again. - */ - if (tty_hung_up_p(filp) || - (info->flags & ASYNC_CLOSING)) { - wait_event_interruptible_tty(info->close_wait, - !(info->flags & ASYNC_CLOSING)); -#ifdef SERIAL_DO_RESTART - if (info->flags & ASYNC_HUP_NOTIFY) - return -EAGAIN; - else - return -ERESTARTSYS; -#else - return -EAGAIN; -#endif - } - - /* - * If non-blocking mode is set, or the port is not enabled, - * then make the check up front and then exit. - */ - if ((filp->f_flags & O_NONBLOCK) || - (tty->flags & (1 << TTY_IO_ERROR))) { - info->flags |= ASYNC_NORMAL_ACTIVE; - return 0; - } - - if (tty->termios->c_cflag & CLOCAL) { - do_clocal = 1; - } - - /* - * Block waiting for the carrier detect and the line to become - * free (i.e., not in use by the callout). While we are in - * this loop, info->count is dropped by one, so that - * rs_close() knows when to free things. We restore it upon - * exit, either normal or abnormal. - */ - retval = 0; - add_wait_queue(&info->open_wait, &wait); -#ifdef SERIAL_DEBUG_OPEN - printk("block_til_ready before block: ttyS%d, count = %d\n", - info->line, info->count); -#endif - local_irq_save(flags); - if (!tty_hung_up_p(filp)) { - extra_count++; - info->count--; - } - local_irq_restore(flags); - info->blocked_open++; - while (1) { - local_irq_save(flags); - /* assert RTS and DTR */ - e100_rts(info, 1); - e100_dtr(info, 1); - local_irq_restore(flags); - set_current_state(TASK_INTERRUPTIBLE); - if (tty_hung_up_p(filp) || - !(info->flags & ASYNC_INITIALIZED)) { -#ifdef SERIAL_DO_RESTART - if (info->flags & ASYNC_HUP_NOTIFY) - retval = -EAGAIN; - else - retval = -ERESTARTSYS; -#else - retval = -EAGAIN; -#endif - break; - } - if (!(info->flags & ASYNC_CLOSING) && do_clocal) - /* && (do_clocal || DCD_IS_ASSERTED) */ - break; - if (signal_pending(current)) { - retval = -ERESTARTSYS; - break; - } -#ifdef SERIAL_DEBUG_OPEN - printk("block_til_ready blocking: ttyS%d, count = %d\n", - info->line, info->count); -#endif - tty_unlock(); - schedule(); - tty_lock(); - } - set_current_state(TASK_RUNNING); - remove_wait_queue(&info->open_wait, &wait); - if (extra_count) - info->count++; - info->blocked_open--; -#ifdef SERIAL_DEBUG_OPEN - printk("block_til_ready after blocking: ttyS%d, count = %d\n", - info->line, info->count); -#endif - if (retval) - return retval; - info->flags |= ASYNC_NORMAL_ACTIVE; - return 0; -} - -static void -deinit_port(struct e100_serial *info) -{ - if (info->dma_out_enabled) { - cris_free_dma(info->dma_out_nbr, info->dma_out_irq_description); - free_irq(info->dma_out_irq_nbr, info); - } - if (info->dma_in_enabled) { - cris_free_dma(info->dma_in_nbr, info->dma_in_irq_description); - free_irq(info->dma_in_irq_nbr, info); - } -} - -/* - * This routine is called whenever a serial port is opened. - * It performs the serial-specific initialization for the tty structure. - */ -static int -rs_open(struct tty_struct *tty, struct file * filp) -{ - struct e100_serial *info; - int retval, line; - unsigned long page; - int allocated_resources = 0; - - /* find which port we want to open */ - line = tty->index; - - if (line < 0 || line >= NR_PORTS) - return -ENODEV; - - /* find the corresponding e100_serial struct in the table */ - info = rs_table + line; - - /* don't allow the opening of ports that are not enabled in the HW config */ - if (!info->enabled) - return -ENODEV; - -#ifdef SERIAL_DEBUG_OPEN - printk("[%d] rs_open %s, count = %d\n", current->pid, tty->name, - info->count); -#endif - - info->count++; - tty->driver_data = info; - info->port.tty = tty; - - info->port.tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; - - if (!tmp_buf) { - page = get_zeroed_page(GFP_KERNEL); - if (!page) { - return -ENOMEM; - } - if (tmp_buf) - free_page(page); - else - tmp_buf = (unsigned char *) page; - } - - /* - * If the port is in the middle of closing, bail out now - */ - if (tty_hung_up_p(filp) || - (info->flags & ASYNC_CLOSING)) { - wait_event_interruptible_tty(info->close_wait, - !(info->flags & ASYNC_CLOSING)); -#ifdef SERIAL_DO_RESTART - return ((info->flags & ASYNC_HUP_NOTIFY) ? - -EAGAIN : -ERESTARTSYS); -#else - return -EAGAIN; -#endif - } - - /* - * If DMA is enabled try to allocate the irq's. - */ - if (info->count == 1) { - allocated_resources = 1; - if (info->dma_in_enabled) { - if (request_irq(info->dma_in_irq_nbr, - rec_interrupt, - info->dma_in_irq_flags, - info->dma_in_irq_description, - info)) { - printk(KERN_WARNING "DMA irq '%s' busy; " - "falling back to non-DMA mode\n", - info->dma_in_irq_description); - /* Make sure we never try to use DMA in */ - /* for the port again. */ - info->dma_in_enabled = 0; - } else if (cris_request_dma(info->dma_in_nbr, - info->dma_in_irq_description, - DMA_VERBOSE_ON_ERROR, - info->dma_owner)) { - free_irq(info->dma_in_irq_nbr, info); - printk(KERN_WARNING "DMA '%s' busy; " - "falling back to non-DMA mode\n", - info->dma_in_irq_description); - /* Make sure we never try to use DMA in */ - /* for the port again. */ - info->dma_in_enabled = 0; - } -#ifdef SERIAL_DEBUG_OPEN - else - printk(KERN_DEBUG "DMA irq '%s' allocated\n", - info->dma_in_irq_description); -#endif - } - if (info->dma_out_enabled) { - if (request_irq(info->dma_out_irq_nbr, - tr_interrupt, - info->dma_out_irq_flags, - info->dma_out_irq_description, - info)) { - printk(KERN_WARNING "DMA irq '%s' busy; " - "falling back to non-DMA mode\n", - info->dma_out_irq_description); - /* Make sure we never try to use DMA out */ - /* for the port again. */ - info->dma_out_enabled = 0; - } else if (cris_request_dma(info->dma_out_nbr, - info->dma_out_irq_description, - DMA_VERBOSE_ON_ERROR, - info->dma_owner)) { - free_irq(info->dma_out_irq_nbr, info); - printk(KERN_WARNING "DMA '%s' busy; " - "falling back to non-DMA mode\n", - info->dma_out_irq_description); - /* Make sure we never try to use DMA out */ - /* for the port again. */ - info->dma_out_enabled = 0; - } -#ifdef SERIAL_DEBUG_OPEN - else - printk(KERN_DEBUG "DMA irq '%s' allocated\n", - info->dma_out_irq_description); -#endif - } - } - - /* - * Start up the serial port - */ - - retval = startup(info); - if (retval) { - if (allocated_resources) - deinit_port(info); - - /* FIXME Decrease count info->count here too? */ - return retval; - } - - - retval = block_til_ready(tty, filp, info); - if (retval) { -#ifdef SERIAL_DEBUG_OPEN - printk("rs_open returning after block_til_ready with %d\n", - retval); -#endif - if (allocated_resources) - deinit_port(info); - - return retval; - } - - if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) { - *tty->termios = info->normal_termios; - change_speed(info); - } - -#ifdef SERIAL_DEBUG_OPEN - printk("rs_open ttyS%d successful...\n", info->line); -#endif - DLOG_INT_TRIG( log_int_pos = 0); - - DFLIP( if (info->line == SERIAL_DEBUG_LINE) { - info->icount.rx = 0; - } ); - - return 0; -} - -#ifdef CONFIG_PROC_FS -/* - * /proc fs routines.... - */ - -static void seq_line_info(struct seq_file *m, struct e100_serial *info) -{ - unsigned long tmp; - - seq_printf(m, "%d: uart:E100 port:%lX irq:%d", - info->line, (unsigned long)info->ioport, info->irq); - - if (!info->ioport || (info->type == PORT_UNKNOWN)) { - seq_printf(m, "\n"); - return; - } - - seq_printf(m, " baud:%d", info->baud); - seq_printf(m, " tx:%lu rx:%lu", - (unsigned long)info->icount.tx, - (unsigned long)info->icount.rx); - tmp = CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE); - if (tmp) - seq_printf(m, " tx_pend:%lu/%lu", - (unsigned long)tmp, - (unsigned long)SERIAL_XMIT_SIZE); - - seq_printf(m, " rx_pend:%lu/%lu", - (unsigned long)info->recv_cnt, - (unsigned long)info->max_recv_cnt); - -#if 1 - if (info->port.tty) { - if (info->port.tty->stopped) - seq_printf(m, " stopped:%i", - (int)info->port.tty->stopped); - if (info->port.tty->hw_stopped) - seq_printf(m, " hw_stopped:%i", - (int)info->port.tty->hw_stopped); - } - - { - unsigned char rstat = info->ioport[REG_STATUS]; - if (rstat & IO_MASK(R_SERIAL0_STATUS, xoff_detect)) - seq_printf(m, " xoff_detect:1"); - } - -#endif - - if (info->icount.frame) - seq_printf(m, " fe:%lu", (unsigned long)info->icount.frame); - - if (info->icount.parity) - seq_printf(m, " pe:%lu", (unsigned long)info->icount.parity); - - if (info->icount.brk) - seq_printf(m, " brk:%lu", (unsigned long)info->icount.brk); - - if (info->icount.overrun) - seq_printf(m, " oe:%lu", (unsigned long)info->icount.overrun); - - /* - * Last thing is the RS-232 status lines - */ - if (!E100_RTS_GET(info)) - seq_puts(m, "|RTS"); - if (!E100_CTS_GET(info)) - seq_puts(m, "|CTS"); - if (!E100_DTR_GET(info)) - seq_puts(m, "|DTR"); - if (!E100_DSR_GET(info)) - seq_puts(m, "|DSR"); - if (!E100_CD_GET(info)) - seq_puts(m, "|CD"); - if (!E100_RI_GET(info)) - seq_puts(m, "|RI"); - seq_puts(m, "\n"); -} - - -static int crisv10_proc_show(struct seq_file *m, void *v) -{ - int i; - - seq_printf(m, "serinfo:1.0 driver:%s\n", serial_version); - - for (i = 0; i < NR_PORTS; i++) { - if (!rs_table[i].enabled) - continue; - seq_line_info(m, &rs_table[i]); - } -#ifdef DEBUG_LOG_INCLUDED - for (i = 0; i < debug_log_pos; i++) { - seq_printf(m, "%-4i %lu.%lu ", - i, debug_log[i].time, - timer_data_to_ns(debug_log[i].timer_data)); - seq_printf(m, debug_log[i].string, debug_log[i].value); - } - seq_printf(m, "debug_log %i/%i\n", i, DEBUG_LOG_SIZE); - debug_log_pos = 0; -#endif - return 0; -} - -static int crisv10_proc_open(struct inode *inode, struct file *file) -{ - return single_open(file, crisv10_proc_show, NULL); -} - -static const struct file_operations crisv10_proc_fops = { - .owner = THIS_MODULE, - .open = crisv10_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; -#endif - - -/* Finally, routines used to initialize the serial driver. */ - -static void show_serial_version(void) -{ - printk(KERN_INFO - "ETRAX 100LX serial-driver %s, " - "(c) 2000-2004 Axis Communications AB\r\n", - &serial_version[11]); /* "$Revision: x.yy" */ -} - -/* rs_init inits the driver at boot (using the module_init chain) */ - -static const struct tty_operations rs_ops = { - .open = rs_open, - .close = rs_close, - .write = rs_write, - .flush_chars = rs_flush_chars, - .write_room = rs_write_room, - .chars_in_buffer = rs_chars_in_buffer, - .flush_buffer = rs_flush_buffer, - .ioctl = rs_ioctl, - .throttle = rs_throttle, - .unthrottle = rs_unthrottle, - .set_termios = rs_set_termios, - .stop = rs_stop, - .start = rs_start, - .hangup = rs_hangup, - .break_ctl = rs_break, - .send_xchar = rs_send_xchar, - .wait_until_sent = rs_wait_until_sent, - .tiocmget = rs_tiocmget, - .tiocmset = rs_tiocmset, -#ifdef CONFIG_PROC_FS - .proc_fops = &crisv10_proc_fops, -#endif -}; - -static int __init rs_init(void) -{ - int i; - struct e100_serial *info; - struct tty_driver *driver = alloc_tty_driver(NR_PORTS); - - if (!driver) - return -ENOMEM; - - show_serial_version(); - - /* Setup the timed flush handler system */ - -#if !defined(CONFIG_ETRAX_SERIAL_FAST_TIMER) - setup_timer(&flush_timer, timed_flush_handler, 0); - mod_timer(&flush_timer, jiffies + 5); -#endif - -#if defined(CONFIG_ETRAX_RS485) -#if defined(CONFIG_ETRAX_RS485_ON_PA) - if (cris_io_interface_allocate_pins(if_ser0, 'a', rs485_pa_bit, - rs485_pa_bit)) { - printk(KERN_CRIT "ETRAX100LX serial: Could not allocate " - "RS485 pin\n"); - put_tty_driver(driver); - return -EBUSY; - } -#endif -#if defined(CONFIG_ETRAX_RS485_ON_PORT_G) - if (cris_io_interface_allocate_pins(if_ser0, 'g', rs485_pa_bit, - rs485_port_g_bit)) { - printk(KERN_CRIT "ETRAX100LX serial: Could not allocate " - "RS485 pin\n"); - put_tty_driver(driver); - return -EBUSY; - } -#endif -#endif - - /* Initialize the tty_driver structure */ - - driver->driver_name = "serial"; - driver->name = "ttyS"; - driver->major = TTY_MAJOR; - driver->minor_start = 64; - driver->type = TTY_DRIVER_TYPE_SERIAL; - driver->subtype = SERIAL_TYPE_NORMAL; - driver->init_termios = tty_std_termios; - driver->init_termios.c_cflag = - B115200 | CS8 | CREAD | HUPCL | CLOCAL; /* is normally B9600 default... */ - driver->init_termios.c_ispeed = 115200; - driver->init_termios.c_ospeed = 115200; - driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; - - tty_set_operations(driver, &rs_ops); - serial_driver = driver; - if (tty_register_driver(driver)) - panic("Couldn't register serial driver\n"); - /* do some initializing for the separate ports */ - - for (i = 0, info = rs_table; i < NR_PORTS; i++,info++) { - if (info->enabled) { - if (cris_request_io_interface(info->io_if, - info->io_if_description)) { - printk(KERN_CRIT "ETRAX100LX async serial: " - "Could not allocate IO pins for " - "%s, port %d\n", - info->io_if_description, i); - info->enabled = 0; - } - } - info->uses_dma_in = 0; - info->uses_dma_out = 0; - info->line = i; - info->port.tty = NULL; - info->type = PORT_ETRAX; - info->tr_running = 0; - info->forced_eop = 0; - info->baud_base = DEF_BAUD_BASE; - info->custom_divisor = 0; - info->flags = 0; - info->close_delay = 5*HZ/10; - info->closing_wait = 30*HZ; - info->x_char = 0; - info->event = 0; - info->count = 0; - info->blocked_open = 0; - info->normal_termios = driver->init_termios; - init_waitqueue_head(&info->open_wait); - init_waitqueue_head(&info->close_wait); - info->xmit.buf = NULL; - info->xmit.tail = info->xmit.head = 0; - info->first_recv_buffer = info->last_recv_buffer = NULL; - info->recv_cnt = info->max_recv_cnt = 0; - info->last_tx_active_usec = 0; - info->last_tx_active = 0; - -#if defined(CONFIG_ETRAX_RS485) - /* Set sane defaults */ - info->rs485.flags &= ~(SER_RS485_RTS_ON_SEND); - info->rs485.flags |= SER_RS485_RTS_AFTER_SEND; - info->rs485.flags &= ~(SER_RS485_RTS_BEFORE_SEND); - info->rs485.delay_rts_before_send = 0; - info->rs485.flags &= ~(SER_RS485_ENABLED); -#endif - INIT_WORK(&info->work, do_softint); - - if (info->enabled) { - printk(KERN_INFO "%s%d at %p is a builtin UART with DMA\n", - serial_driver->name, info->line, info->ioport); - } - } -#ifdef CONFIG_ETRAX_FAST_TIMER -#ifdef CONFIG_ETRAX_SERIAL_FAST_TIMER - memset(fast_timers, 0, sizeof(fast_timers)); -#endif -#ifdef CONFIG_ETRAX_RS485 - memset(fast_timers_rs485, 0, sizeof(fast_timers_rs485)); -#endif - fast_timer_init(); -#endif - -#ifndef CONFIG_SVINTO_SIM -#ifndef CONFIG_ETRAX_KGDB - /* Not needed in simulator. May only complicate stuff. */ - /* hook the irq's for DMA channel 6 and 7, serial output and input, and some more... */ - - if (request_irq(SERIAL_IRQ_NBR, ser_interrupt, - IRQF_SHARED | IRQF_DISABLED, "serial ", driver)) - panic("%s: Failed to request irq8", __func__); - -#endif -#endif /* CONFIG_SVINTO_SIM */ - - return 0; -} - -/* this makes sure that rs_init is called during kernel boot */ - -module_init(rs_init); diff --git a/drivers/serial/crisv10.h b/drivers/serial/crisv10.h deleted file mode 100644 index ea0beb46a10d..000000000000 --- a/drivers/serial/crisv10.h +++ /dev/null @@ -1,147 +0,0 @@ -/* - * serial.h: Arch-dep definitions for the Etrax100 serial driver. - * - * Copyright (C) 1998-2007 Axis Communications AB - */ - -#ifndef _ETRAX_SERIAL_H -#define _ETRAX_SERIAL_H - -#include <linux/circ_buf.h> -#include <asm/termios.h> -#include <asm/dma.h> -#include <arch/io_interface_mux.h> - -/* Software state per channel */ - -#ifdef __KERNEL__ -/* - * This is our internal structure for each serial port's state. - * - * Many fields are paralleled by the structure used by the serial_struct - * structure. - * - * For definitions of the flags field, see tty.h - */ - -#define SERIAL_RECV_DESCRIPTORS 8 - -struct etrax_recv_buffer { - struct etrax_recv_buffer *next; - unsigned short length; - unsigned char error; - unsigned char pad; - - unsigned char buffer[0]; -}; - -struct e100_serial { - struct tty_port port; - int baud; - volatile u8 *ioport; /* R_SERIALx_CTRL */ - u32 irq; /* bitnr in R_IRQ_MASK2 for dmaX_descr */ - - /* Output registers */ - volatile u8 *oclrintradr; /* adr to R_DMA_CHx_CLR_INTR */ - volatile u32 *ofirstadr; /* adr to R_DMA_CHx_FIRST */ - volatile u8 *ocmdadr; /* adr to R_DMA_CHx_CMD */ - const volatile u8 *ostatusadr; /* adr to R_DMA_CHx_STATUS */ - - /* Input registers */ - volatile u8 *iclrintradr; /* adr to R_DMA_CHx_CLR_INTR */ - volatile u32 *ifirstadr; /* adr to R_DMA_CHx_FIRST */ - volatile u8 *icmdadr; /* adr to R_DMA_CHx_CMD */ - volatile u32 *idescradr; /* adr to R_DMA_CHx_DESCR */ - - int flags; /* defined in tty.h */ - - u8 rx_ctrl; /* shadow for R_SERIALx_REC_CTRL */ - u8 tx_ctrl; /* shadow for R_SERIALx_TR_CTRL */ - u8 iseteop; /* bit number for R_SET_EOP for the input dma */ - int enabled; /* Set to 1 if the port is enabled in HW config */ - - u8 dma_out_enabled; /* Set to 1 if DMA should be used */ - u8 dma_in_enabled; /* Set to 1 if DMA should be used */ - - /* end of fields defined in rs_table[] in .c-file */ - int dma_owner; - unsigned int dma_in_nbr; - unsigned int dma_out_nbr; - unsigned int dma_in_irq_nbr; - unsigned int dma_out_irq_nbr; - unsigned long dma_in_irq_flags; - unsigned long dma_out_irq_flags; - char *dma_in_irq_description; - char *dma_out_irq_description; - - enum cris_io_interface io_if; - char *io_if_description; - - u8 uses_dma_in; /* Set to 1 if DMA is used */ - u8 uses_dma_out; /* Set to 1 if DMA is used */ - u8 forced_eop; /* a fifo eop has been forced */ - int baud_base; /* For special baudrates */ - int custom_divisor; /* For special baudrates */ - struct etrax_dma_descr tr_descr; - struct etrax_dma_descr rec_descr[SERIAL_RECV_DESCRIPTORS]; - int cur_rec_descr; - - volatile int tr_running; /* 1 if output is running */ - - struct tty_struct *tty; - int read_status_mask; - int ignore_status_mask; - int x_char; /* xon/xoff character */ - int close_delay; - unsigned short closing_wait; - unsigned short closing_wait2; - unsigned long event; - unsigned long last_active; - int line; - int type; /* PORT_ETRAX */ - int count; /* # of fd on device */ - int blocked_open; /* # of blocked opens */ - struct circ_buf xmit; - struct etrax_recv_buffer *first_recv_buffer; - struct etrax_recv_buffer *last_recv_buffer; - unsigned int recv_cnt; - unsigned int max_recv_cnt; - - struct work_struct work; - struct async_icount icount; /* error-statistics etc.*/ - struct ktermios normal_termios; - struct ktermios callout_termios; - wait_queue_head_t open_wait; - wait_queue_head_t close_wait; - - unsigned long char_time_usec; /* The time for 1 char, in usecs */ - unsigned long flush_time_usec; /* How often we should flush */ - unsigned long last_tx_active_usec; /* Last tx usec in the jiffies */ - unsigned long last_tx_active; /* Last tx time in jiffies */ - unsigned long last_rx_active_usec; /* Last rx usec in the jiffies */ - unsigned long last_rx_active; /* Last rx time in jiffies */ - - int break_detected_cnt; - int errorcode; - -#ifdef CONFIG_ETRAX_RS485 - struct serial_rs485 rs485; /* RS-485 support */ -#endif -}; - -/* this PORT is not in the standard serial.h. it's not actually used for - * anything since we only have one type of async serial-port anyway in this - * system. - */ - -#define PORT_ETRAX 1 - -/* - * Events are used to schedule things to happen at timer-interrupt - * time, instead of at rs interrupt time. - */ -#define RS_EVENT_WRITE_WAKEUP 0 - -#endif /* __KERNEL__ */ - -#endif /* !_ETRAX_SERIAL_H */ diff --git a/drivers/serial/dz.c b/drivers/serial/dz.c deleted file mode 100644 index 57421d776329..000000000000 --- a/drivers/serial/dz.c +++ /dev/null @@ -1,955 +0,0 @@ -/* - * dz.c: Serial port driver for DECstations equipped - * with the DZ chipset. - * - * Copyright (C) 1998 Olivier A. D. Lebaillif - * - * Email: olivier.lebaillif@ifrsys.com - * - * Copyright (C) 2004, 2006, 2007 Maciej W. Rozycki - * - * [31-AUG-98] triemer - * Changed IRQ to use Harald's dec internals interrupts.h - * removed base_addr code - moving address assignment to setup.c - * Changed name of dz_init to rs_init to be consistent with tc code - * [13-NOV-98] triemer fixed code to receive characters - * after patches by harald to irq code. - * [09-JAN-99] triemer minor fix for schedule - due to removal of timeout - * field from "current" - somewhere between 2.1.121 and 2.1.131 - Qua Jun 27 15:02:26 BRT 2001 - * [27-JUN-2001] Arnaldo Carvalho de Melo <acme@conectiva.com.br> - cleanups - * - * Parts (C) 1999 David Airlie, airlied@linux.ie - * [07-SEP-99] Bugfixes - * - * [06-Jan-2002] Russell King <rmk@arm.linux.org.uk> - * Converted to new serial core - */ - -#undef DEBUG_DZ - -#if defined(CONFIG_SERIAL_DZ_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/bitops.h> -#include <linux/compiler.h> -#include <linux/console.h> -#include <linux/delay.h> -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/kernel.h> -#include <linux/major.h> -#include <linux/module.h> -#include <linux/serial.h> -#include <linux/serial_core.h> -#include <linux/sysrq.h> -#include <linux/tty.h> - -#include <asm/atomic.h> -#include <asm/bootinfo.h> -#include <asm/io.h> -#include <asm/system.h> - -#include <asm/dec/interrupts.h> -#include <asm/dec/kn01.h> -#include <asm/dec/kn02.h> -#include <asm/dec/machtype.h> -#include <asm/dec/prom.h> -#include <asm/dec/system.h> - -#include "dz.h" - - -MODULE_DESCRIPTION("DECstation DZ serial driver"); -MODULE_LICENSE("GPL"); - - -static char dz_name[] __initdata = "DECstation DZ serial driver version "; -static char dz_version[] __initdata = "1.04"; - -struct dz_port { - struct dz_mux *mux; - struct uart_port port; - unsigned int cflag; -}; - -struct dz_mux { - struct dz_port dport[DZ_NB_PORT]; - atomic_t map_guard; - atomic_t irq_guard; - int initialised; -}; - -static struct dz_mux dz_mux; - -static inline struct dz_port *to_dport(struct uart_port *uport) -{ - return container_of(uport, struct dz_port, port); -} - -/* - * ------------------------------------------------------------ - * dz_in () and dz_out () - * - * These routines are used to access the registers of the DZ - * chip, hiding relocation differences between implementation. - * ------------------------------------------------------------ - */ - -static u16 dz_in(struct dz_port *dport, unsigned offset) -{ - void __iomem *addr = dport->port.membase + offset; - - return readw(addr); -} - -static void dz_out(struct dz_port *dport, unsigned offset, u16 value) -{ - void __iomem *addr = dport->port.membase + offset; - - writew(value, addr); -} - -/* - * ------------------------------------------------------------ - * rs_stop () and rs_start () - * - * These routines are called before setting or resetting - * tty->stopped. They enable or disable transmitter interrupts, - * as necessary. - * ------------------------------------------------------------ - */ - -static void dz_stop_tx(struct uart_port *uport) -{ - struct dz_port *dport = to_dport(uport); - u16 tmp, mask = 1 << dport->port.line; - - tmp = dz_in(dport, DZ_TCR); /* read the TX flag */ - tmp &= ~mask; /* clear the TX flag */ - dz_out(dport, DZ_TCR, tmp); -} - -static void dz_start_tx(struct uart_port *uport) -{ - struct dz_port *dport = to_dport(uport); - u16 tmp, mask = 1 << dport->port.line; - - tmp = dz_in(dport, DZ_TCR); /* read the TX flag */ - tmp |= mask; /* set the TX flag */ - dz_out(dport, DZ_TCR, tmp); -} - -static void dz_stop_rx(struct uart_port *uport) -{ - struct dz_port *dport = to_dport(uport); - - dport->cflag &= ~DZ_RXENAB; - dz_out(dport, DZ_LPR, dport->cflag); -} - -static void dz_enable_ms(struct uart_port *uport) -{ - /* nothing to do */ -} - -/* - * ------------------------------------------------------------ - * - * Here start the interrupt handling routines. All of the following - * subroutines are declared as inline and are folded into - * dz_interrupt. They were separated out for readability's sake. - * - * Note: dz_interrupt() is a "fast" interrupt, which means that it - * runs with interrupts turned off. People who may want to modify - * dz_interrupt() should try to keep the interrupt handler as fast as - * possible. After you are done making modifications, it is not a bad - * idea to do: - * - * make drivers/serial/dz.s - * - * and look at the resulting assemble code in dz.s. - * - * ------------------------------------------------------------ - */ - -/* - * ------------------------------------------------------------ - * receive_char () - * - * This routine deals with inputs from any lines. - * ------------------------------------------------------------ - */ -static inline void dz_receive_chars(struct dz_mux *mux) -{ - struct uart_port *uport; - struct dz_port *dport = &mux->dport[0]; - struct tty_struct *tty = NULL; - struct uart_icount *icount; - int lines_rx[DZ_NB_PORT] = { [0 ... DZ_NB_PORT - 1] = 0 }; - unsigned char ch, flag; - u16 status; - int i; - - while ((status = dz_in(dport, DZ_RBUF)) & DZ_DVAL) { - dport = &mux->dport[LINE(status)]; - uport = &dport->port; - tty = uport->state->port.tty; /* point to the proper dev */ - - ch = UCHAR(status); /* grab the char */ - flag = TTY_NORMAL; - - icount = &uport->icount; - icount->rx++; - - if (unlikely(status & (DZ_OERR | DZ_FERR | DZ_PERR))) { - - /* - * There is no separate BREAK status bit, so treat - * null characters with framing errors as BREAKs; - * normally, otherwise. For this move the Framing - * Error bit to a simulated BREAK bit. - */ - if (!ch) { - status |= (status & DZ_FERR) >> - (ffs(DZ_FERR) - ffs(DZ_BREAK)); - status &= ~DZ_FERR; - } - - /* Handle SysRq/SAK & keep track of the statistics. */ - if (status & DZ_BREAK) { - icount->brk++; - if (uart_handle_break(uport)) - continue; - } else if (status & DZ_FERR) - icount->frame++; - else if (status & DZ_PERR) - icount->parity++; - if (status & DZ_OERR) - icount->overrun++; - - status &= uport->read_status_mask; - if (status & DZ_BREAK) - flag = TTY_BREAK; - else if (status & DZ_FERR) - flag = TTY_FRAME; - else if (status & DZ_PERR) - flag = TTY_PARITY; - - } - - if (uart_handle_sysrq_char(uport, ch)) - continue; - - uart_insert_char(uport, status, DZ_OERR, ch, flag); - lines_rx[LINE(status)] = 1; - } - for (i = 0; i < DZ_NB_PORT; i++) - if (lines_rx[i]) - tty_flip_buffer_push(mux->dport[i].port.state->port.tty); -} - -/* - * ------------------------------------------------------------ - * transmit_char () - * - * This routine deals with outputs to any lines. - * ------------------------------------------------------------ - */ -static inline void dz_transmit_chars(struct dz_mux *mux) -{ - struct dz_port *dport = &mux->dport[0]; - struct circ_buf *xmit; - unsigned char tmp; - u16 status; - - status = dz_in(dport, DZ_CSR); - dport = &mux->dport[LINE(status)]; - xmit = &dport->port.state->xmit; - - if (dport->port.x_char) { /* XON/XOFF chars */ - dz_out(dport, DZ_TDR, dport->port.x_char); - dport->port.icount.tx++; - dport->port.x_char = 0; - return; - } - /* If nothing to do or stopped or hardware stopped. */ - if (uart_circ_empty(xmit) || uart_tx_stopped(&dport->port)) { - spin_lock(&dport->port.lock); - dz_stop_tx(&dport->port); - spin_unlock(&dport->port.lock); - return; - } - - /* - * If something to do... (remember the dz has no output fifo, - * so we go one char at a time) :-< - */ - tmp = xmit->buf[xmit->tail]; - xmit->tail = (xmit->tail + 1) & (DZ_XMIT_SIZE - 1); - dz_out(dport, DZ_TDR, tmp); - dport->port.icount.tx++; - - if (uart_circ_chars_pending(xmit) < DZ_WAKEUP_CHARS) - uart_write_wakeup(&dport->port); - - /* Are we are done. */ - if (uart_circ_empty(xmit)) { - spin_lock(&dport->port.lock); - dz_stop_tx(&dport->port); - spin_unlock(&dport->port.lock); - } -} - -/* - * ------------------------------------------------------------ - * check_modem_status() - * - * DS 3100 & 5100: Only valid for the MODEM line, duh! - * DS 5000/200: Valid for the MODEM and PRINTER line. - * ------------------------------------------------------------ - */ -static inline void check_modem_status(struct dz_port *dport) -{ - /* - * FIXME: - * 1. No status change interrupt; use a timer. - * 2. Handle the 3100/5000 as appropriate. --macro - */ - u16 status; - - /* If not the modem line just return. */ - if (dport->port.line != DZ_MODEM) - return; - - status = dz_in(dport, DZ_MSR); - - /* it's easy, since DSR2 is the only bit in the register */ - if (status) - dport->port.icount.dsr++; -} - -/* - * ------------------------------------------------------------ - * dz_interrupt () - * - * this is the main interrupt routine for the DZ chip. - * It deals with the multiple ports. - * ------------------------------------------------------------ - */ -static irqreturn_t dz_interrupt(int irq, void *dev_id) -{ - struct dz_mux *mux = dev_id; - struct dz_port *dport = &mux->dport[0]; - u16 status; - - /* get the reason why we just got an irq */ - status = dz_in(dport, DZ_CSR); - - if ((status & (DZ_RDONE | DZ_RIE)) == (DZ_RDONE | DZ_RIE)) - dz_receive_chars(mux); - - if ((status & (DZ_TRDY | DZ_TIE)) == (DZ_TRDY | DZ_TIE)) - dz_transmit_chars(mux); - - return IRQ_HANDLED; -} - -/* - * ------------------------------------------------------------------- - * Here ends the DZ interrupt routines. - * ------------------------------------------------------------------- - */ - -static unsigned int dz_get_mctrl(struct uart_port *uport) -{ - /* - * FIXME: Handle the 3100/5000 as appropriate. --macro - */ - struct dz_port *dport = to_dport(uport); - unsigned int mctrl = TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; - - if (dport->port.line == DZ_MODEM) { - if (dz_in(dport, DZ_MSR) & DZ_MODEM_DSR) - mctrl &= ~TIOCM_DSR; - } - - return mctrl; -} - -static void dz_set_mctrl(struct uart_port *uport, unsigned int mctrl) -{ - /* - * FIXME: Handle the 3100/5000 as appropriate. --macro - */ - struct dz_port *dport = to_dport(uport); - u16 tmp; - - if (dport->port.line == DZ_MODEM) { - tmp = dz_in(dport, DZ_TCR); - if (mctrl & TIOCM_DTR) - tmp &= ~DZ_MODEM_DTR; - else - tmp |= DZ_MODEM_DTR; - dz_out(dport, DZ_TCR, tmp); - } -} - -/* - * ------------------------------------------------------------------- - * startup () - * - * various initialization tasks - * ------------------------------------------------------------------- - */ -static int dz_startup(struct uart_port *uport) -{ - struct dz_port *dport = to_dport(uport); - struct dz_mux *mux = dport->mux; - unsigned long flags; - int irq_guard; - int ret; - u16 tmp; - - irq_guard = atomic_add_return(1, &mux->irq_guard); - if (irq_guard != 1) - return 0; - - ret = request_irq(dport->port.irq, dz_interrupt, - IRQF_SHARED, "dz", mux); - if (ret) { - atomic_add(-1, &mux->irq_guard); - printk(KERN_ERR "dz: Cannot get IRQ %d!\n", dport->port.irq); - return ret; - } - - spin_lock_irqsave(&dport->port.lock, flags); - - /* Enable interrupts. */ - tmp = dz_in(dport, DZ_CSR); - tmp |= DZ_RIE | DZ_TIE; - dz_out(dport, DZ_CSR, tmp); - - spin_unlock_irqrestore(&dport->port.lock, flags); - - return 0; -} - -/* - * ------------------------------------------------------------------- - * shutdown () - * - * This routine will shutdown a serial port; interrupts are disabled, and - * DTR is dropped if the hangup on close termio flag is on. - * ------------------------------------------------------------------- - */ -static void dz_shutdown(struct uart_port *uport) -{ - struct dz_port *dport = to_dport(uport); - struct dz_mux *mux = dport->mux; - unsigned long flags; - int irq_guard; - u16 tmp; - - spin_lock_irqsave(&dport->port.lock, flags); - dz_stop_tx(&dport->port); - spin_unlock_irqrestore(&dport->port.lock, flags); - - irq_guard = atomic_add_return(-1, &mux->irq_guard); - if (!irq_guard) { - /* Disable interrupts. */ - tmp = dz_in(dport, DZ_CSR); - tmp &= ~(DZ_RIE | DZ_TIE); - dz_out(dport, DZ_CSR, tmp); - - free_irq(dport->port.irq, mux); - } -} - -/* - * ------------------------------------------------------------------- - * dz_tx_empty() -- get the transmitter empty status - * - * Purpose: Let user call ioctl() to get info when the UART physically - * is emptied. On bus types like RS485, the transmitter must - * release the bus after transmitting. This must be done when - * the transmit shift register is empty, not be done when the - * transmit holding register is empty. This functionality - * allows an RS485 driver to be written in user space. - * ------------------------------------------------------------------- - */ -static unsigned int dz_tx_empty(struct uart_port *uport) -{ - struct dz_port *dport = to_dport(uport); - unsigned short tmp, mask = 1 << dport->port.line; - - tmp = dz_in(dport, DZ_TCR); - tmp &= mask; - - return tmp ? 0 : TIOCSER_TEMT; -} - -static void dz_break_ctl(struct uart_port *uport, int break_state) -{ - /* - * FIXME: Can't access BREAK bits in TDR easily; - * reuse the code for polled TX. --macro - */ - struct dz_port *dport = to_dport(uport); - unsigned long flags; - unsigned short tmp, mask = 1 << dport->port.line; - - spin_lock_irqsave(&uport->lock, flags); - tmp = dz_in(dport, DZ_TCR); - if (break_state) - tmp |= mask; - else - tmp &= ~mask; - dz_out(dport, DZ_TCR, tmp); - spin_unlock_irqrestore(&uport->lock, flags); -} - -static int dz_encode_baud_rate(unsigned int baud) -{ - switch (baud) { - case 50: - return DZ_B50; - case 75: - return DZ_B75; - case 110: - return DZ_B110; - case 134: - return DZ_B134; - case 150: - return DZ_B150; - case 300: - return DZ_B300; - case 600: - return DZ_B600; - case 1200: - return DZ_B1200; - case 1800: - return DZ_B1800; - case 2000: - return DZ_B2000; - case 2400: - return DZ_B2400; - case 3600: - return DZ_B3600; - case 4800: - return DZ_B4800; - case 7200: - return DZ_B7200; - case 9600: - return DZ_B9600; - default: - return -1; - } -} - - -static void dz_reset(struct dz_port *dport) -{ - struct dz_mux *mux = dport->mux; - - if (mux->initialised) - return; - - dz_out(dport, DZ_CSR, DZ_CLR); - while (dz_in(dport, DZ_CSR) & DZ_CLR); - iob(); - - /* Enable scanning. */ - dz_out(dport, DZ_CSR, DZ_MSE); - - mux->initialised = 1; -} - -static void dz_set_termios(struct uart_port *uport, struct ktermios *termios, - struct ktermios *old_termios) -{ - struct dz_port *dport = to_dport(uport); - unsigned long flags; - unsigned int cflag, baud; - int bflag; - - cflag = dport->port.line; - - switch (termios->c_cflag & CSIZE) { - case CS5: - cflag |= DZ_CS5; - break; - case CS6: - cflag |= DZ_CS6; - break; - case CS7: - cflag |= DZ_CS7; - break; - case CS8: - default: - cflag |= DZ_CS8; - } - - if (termios->c_cflag & CSTOPB) - cflag |= DZ_CSTOPB; - if (termios->c_cflag & PARENB) - cflag |= DZ_PARENB; - if (termios->c_cflag & PARODD) - cflag |= DZ_PARODD; - - baud = uart_get_baud_rate(uport, termios, old_termios, 50, 9600); - bflag = dz_encode_baud_rate(baud); - if (bflag < 0) { /* Try to keep unchanged. */ - baud = uart_get_baud_rate(uport, old_termios, NULL, 50, 9600); - bflag = dz_encode_baud_rate(baud); - if (bflag < 0) { /* Resort to 9600. */ - baud = 9600; - bflag = DZ_B9600; - } - tty_termios_encode_baud_rate(termios, baud, baud); - } - cflag |= bflag; - - if (termios->c_cflag & CREAD) - cflag |= DZ_RXENAB; - - spin_lock_irqsave(&dport->port.lock, flags); - - uart_update_timeout(uport, termios->c_cflag, baud); - - dz_out(dport, DZ_LPR, cflag); - dport->cflag = cflag; - - /* setup accept flag */ - dport->port.read_status_mask = DZ_OERR; - if (termios->c_iflag & INPCK) - dport->port.read_status_mask |= DZ_FERR | DZ_PERR; - if (termios->c_iflag & (BRKINT | PARMRK)) - dport->port.read_status_mask |= DZ_BREAK; - - /* characters to ignore */ - uport->ignore_status_mask = 0; - if ((termios->c_iflag & (IGNPAR | IGNBRK)) == (IGNPAR | IGNBRK)) - dport->port.ignore_status_mask |= DZ_OERR; - if (termios->c_iflag & IGNPAR) - dport->port.ignore_status_mask |= DZ_FERR | DZ_PERR; - if (termios->c_iflag & IGNBRK) - dport->port.ignore_status_mask |= DZ_BREAK; - - spin_unlock_irqrestore(&dport->port.lock, flags); -} - -/* - * Hack alert! - * Required solely so that the initial PROM-based console - * works undisturbed in parallel with this one. - */ -static void dz_pm(struct uart_port *uport, unsigned int state, - unsigned int oldstate) -{ - struct dz_port *dport = to_dport(uport); - unsigned long flags; - - spin_lock_irqsave(&dport->port.lock, flags); - if (state < 3) - dz_start_tx(&dport->port); - else - dz_stop_tx(&dport->port); - spin_unlock_irqrestore(&dport->port.lock, flags); -} - - -static const char *dz_type(struct uart_port *uport) -{ - return "DZ"; -} - -static void dz_release_port(struct uart_port *uport) -{ - struct dz_mux *mux = to_dport(uport)->mux; - int map_guard; - - iounmap(uport->membase); - uport->membase = NULL; - - map_guard = atomic_add_return(-1, &mux->map_guard); - if (!map_guard) - release_mem_region(uport->mapbase, dec_kn_slot_size); -} - -static int dz_map_port(struct uart_port *uport) -{ - if (!uport->membase) - uport->membase = ioremap_nocache(uport->mapbase, - dec_kn_slot_size); - if (!uport->membase) { - printk(KERN_ERR "dz: Cannot map MMIO\n"); - return -ENOMEM; - } - return 0; -} - -static int dz_request_port(struct uart_port *uport) -{ - struct dz_mux *mux = to_dport(uport)->mux; - int map_guard; - int ret; - - map_guard = atomic_add_return(1, &mux->map_guard); - if (map_guard == 1) { - if (!request_mem_region(uport->mapbase, dec_kn_slot_size, - "dz")) { - atomic_add(-1, &mux->map_guard); - printk(KERN_ERR - "dz: Unable to reserve MMIO resource\n"); - return -EBUSY; - } - } - ret = dz_map_port(uport); - if (ret) { - map_guard = atomic_add_return(-1, &mux->map_guard); - if (!map_guard) - release_mem_region(uport->mapbase, dec_kn_slot_size); - return ret; - } - return 0; -} - -static void dz_config_port(struct uart_port *uport, int flags) -{ - struct dz_port *dport = to_dport(uport); - - if (flags & UART_CONFIG_TYPE) { - if (dz_request_port(uport)) - return; - - uport->type = PORT_DZ; - - dz_reset(dport); - } -} - -/* - * Verify the new serial_struct (for TIOCSSERIAL). - */ -static int dz_verify_port(struct uart_port *uport, struct serial_struct *ser) -{ - int ret = 0; - - if (ser->type != PORT_UNKNOWN && ser->type != PORT_DZ) - ret = -EINVAL; - if (ser->irq != uport->irq) - ret = -EINVAL; - return ret; -} - -static struct uart_ops dz_ops = { - .tx_empty = dz_tx_empty, - .get_mctrl = dz_get_mctrl, - .set_mctrl = dz_set_mctrl, - .stop_tx = dz_stop_tx, - .start_tx = dz_start_tx, - .stop_rx = dz_stop_rx, - .enable_ms = dz_enable_ms, - .break_ctl = dz_break_ctl, - .startup = dz_startup, - .shutdown = dz_shutdown, - .set_termios = dz_set_termios, - .pm = dz_pm, - .type = dz_type, - .release_port = dz_release_port, - .request_port = dz_request_port, - .config_port = dz_config_port, - .verify_port = dz_verify_port, -}; - -static void __init dz_init_ports(void) -{ - static int first = 1; - unsigned long base; - int line; - - if (!first) - return; - first = 0; - - if (mips_machtype == MACH_DS23100 || mips_machtype == MACH_DS5100) - base = dec_kn_slot_base + KN01_DZ11; - else - base = dec_kn_slot_base + KN02_DZ11; - - for (line = 0; line < DZ_NB_PORT; line++) { - struct dz_port *dport = &dz_mux.dport[line]; - struct uart_port *uport = &dport->port; - - dport->mux = &dz_mux; - - uport->irq = dec_interrupt[DEC_IRQ_DZ11]; - uport->fifosize = 1; - uport->iotype = UPIO_MEM; - uport->flags = UPF_BOOT_AUTOCONF; - uport->ops = &dz_ops; - uport->line = line; - uport->mapbase = base; - } -} - -#ifdef CONFIG_SERIAL_DZ_CONSOLE -/* - * ------------------------------------------------------------------- - * dz_console_putchar() -- transmit a character - * - * Polled transmission. This is tricky. We need to mask transmit - * interrupts so that they do not interfere, enable the transmitter - * for the line requested and then wait till the transmit scanner - * requests data for this line. But it may request data for another - * line first, in which case we have to disable its transmitter and - * repeat waiting till our line pops up. Only then the character may - * be transmitted. Finally, the state of the transmitter mask is - * restored. Welcome to the world of PDP-11! - * ------------------------------------------------------------------- - */ -static void dz_console_putchar(struct uart_port *uport, int ch) -{ - struct dz_port *dport = to_dport(uport); - unsigned long flags; - unsigned short csr, tcr, trdy, mask; - int loops = 10000; - - spin_lock_irqsave(&dport->port.lock, flags); - csr = dz_in(dport, DZ_CSR); - dz_out(dport, DZ_CSR, csr & ~DZ_TIE); - tcr = dz_in(dport, DZ_TCR); - tcr |= 1 << dport->port.line; - mask = tcr; - dz_out(dport, DZ_TCR, mask); - iob(); - spin_unlock_irqrestore(&dport->port.lock, flags); - - do { - trdy = dz_in(dport, DZ_CSR); - if (!(trdy & DZ_TRDY)) - continue; - trdy = (trdy & DZ_TLINE) >> 8; - if (trdy == dport->port.line) - break; - mask &= ~(1 << trdy); - dz_out(dport, DZ_TCR, mask); - iob(); - udelay(2); - } while (--loops); - - if (loops) /* Cannot send otherwise. */ - dz_out(dport, DZ_TDR, ch); - - dz_out(dport, DZ_TCR, tcr); - dz_out(dport, DZ_CSR, csr); -} - -/* - * ------------------------------------------------------------------- - * dz_console_print () - * - * dz_console_print is registered for printk. - * The console must be locked when we get here. - * ------------------------------------------------------------------- - */ -static void dz_console_print(struct console *co, - const char *str, - unsigned int count) -{ - struct dz_port *dport = &dz_mux.dport[co->index]; -#ifdef DEBUG_DZ - prom_printf((char *) str); -#endif - uart_console_write(&dport->port, str, count, dz_console_putchar); -} - -static int __init dz_console_setup(struct console *co, char *options) -{ - struct dz_port *dport = &dz_mux.dport[co->index]; - struct uart_port *uport = &dport->port; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - int ret; - - ret = dz_map_port(uport); - if (ret) - return ret; - - spin_lock_init(&dport->port.lock); /* For dz_pm(). */ - - dz_reset(dport); - dz_pm(uport, 0, -1); - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(&dport->port, co, baud, parity, bits, flow); -} - -static struct uart_driver dz_reg; -static struct console dz_console = { - .name = "ttyS", - .write = dz_console_print, - .device = uart_console_device, - .setup = dz_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &dz_reg, -}; - -static int __init dz_serial_console_init(void) -{ - if (!IOASIC) { - dz_init_ports(); - register_console(&dz_console); - return 0; - } else - return -ENXIO; -} - -console_initcall(dz_serial_console_init); - -#define SERIAL_DZ_CONSOLE &dz_console -#else -#define SERIAL_DZ_CONSOLE NULL -#endif /* CONFIG_SERIAL_DZ_CONSOLE */ - -static struct uart_driver dz_reg = { - .owner = THIS_MODULE, - .driver_name = "serial", - .dev_name = "ttyS", - .major = TTY_MAJOR, - .minor = 64, - .nr = DZ_NB_PORT, - .cons = SERIAL_DZ_CONSOLE, -}; - -static int __init dz_init(void) -{ - int ret, i; - - if (IOASIC) - return -ENXIO; - - printk("%s%s\n", dz_name, dz_version); - - dz_init_ports(); - - ret = uart_register_driver(&dz_reg); - if (ret) - return ret; - - for (i = 0; i < DZ_NB_PORT; i++) - uart_add_one_port(&dz_reg, &dz_mux.dport[i].port); - - return 0; -} - -module_init(dz_init); diff --git a/drivers/serial/dz.h b/drivers/serial/dz.h deleted file mode 100644 index faf169ed27b3..000000000000 --- a/drivers/serial/dz.h +++ /dev/null @@ -1,129 +0,0 @@ -/* - * dz.h: Serial port driver for DECstations equipped - * with the DZ chipset. - * - * Copyright (C) 1998 Olivier A. D. Lebaillif - * - * Email: olivier.lebaillif@ifrsys.com - * - * Copyright (C) 2004, 2006 Maciej W. Rozycki - */ -#ifndef DZ_SERIAL_H -#define DZ_SERIAL_H - -/* - * Definitions for the Control and Status Register. - */ -#define DZ_TRDY 0x8000 /* Transmitter empty */ -#define DZ_TIE 0x4000 /* Transmitter Interrupt Enbl */ -#define DZ_TLINE 0x0300 /* Transmitter Line Number */ -#define DZ_RDONE 0x0080 /* Receiver data ready */ -#define DZ_RIE 0x0040 /* Receive Interrupt Enable */ -#define DZ_MSE 0x0020 /* Master Scan Enable */ -#define DZ_CLR 0x0010 /* Master reset */ -#define DZ_MAINT 0x0008 /* Loop Back Mode */ - -/* - * Definitions for the Receiver Buffer Register. - */ -#define DZ_RBUF_MASK 0x00FF /* Data Mask */ -#define DZ_LINE_MASK 0x0300 /* Line Mask */ -#define DZ_DVAL 0x8000 /* Valid Data indicator */ -#define DZ_OERR 0x4000 /* Overrun error indicator */ -#define DZ_FERR 0x2000 /* Frame error indicator */ -#define DZ_PERR 0x1000 /* Parity error indicator */ - -#define DZ_BREAK 0x0800 /* BREAK event software flag */ - -#define LINE(x) ((x & DZ_LINE_MASK) >> 8) /* Get the line number - from the input buffer */ -#define UCHAR(x) ((unsigned char)(x & DZ_RBUF_MASK)) - -/* - * Definitions for the Transmit Control Register. - */ -#define DZ_LINE_KEYBOARD 0x0001 -#define DZ_LINE_MOUSE 0x0002 -#define DZ_LINE_MODEM 0x0004 -#define DZ_LINE_PRINTER 0x0008 - -#define DZ_MODEM_RTS 0x0800 /* RTS for the modem line (2) */ -#define DZ_MODEM_DTR 0x0400 /* DTR for the modem line (2) */ -#define DZ_PRINT_RTS 0x0200 /* RTS for the prntr line (3) */ -#define DZ_PRINT_DTR 0x0100 /* DTR for the prntr line (3) */ -#define DZ_LNENB 0x000f /* Transmitter Line Enable */ - -/* - * Definitions for the Modem Status Register. - */ -#define DZ_MODEM_RI 0x0800 /* RI for the modem line (2) */ -#define DZ_MODEM_CD 0x0400 /* CD for the modem line (2) */ -#define DZ_MODEM_DSR 0x0200 /* DSR for the modem line (2) */ -#define DZ_MODEM_CTS 0x0100 /* CTS for the modem line (2) */ -#define DZ_PRINT_RI 0x0008 /* RI for the printer line (3) */ -#define DZ_PRINT_CD 0x0004 /* CD for the printer line (3) */ -#define DZ_PRINT_DSR 0x0002 /* DSR for the prntr line (3) */ -#define DZ_PRINT_CTS 0x0001 /* CTS for the prntr line (3) */ - -/* - * Definitions for the Transmit Data Register. - */ -#define DZ_BRK0 0x0100 /* Break assertion for line 0 */ -#define DZ_BRK1 0x0200 /* Break assertion for line 1 */ -#define DZ_BRK2 0x0400 /* Break assertion for line 2 */ -#define DZ_BRK3 0x0800 /* Break assertion for line 3 */ - -/* - * Definitions for the Line Parameter Register. - */ -#define DZ_KEYBOARD 0x0000 /* line 0 = keyboard */ -#define DZ_MOUSE 0x0001 /* line 1 = mouse */ -#define DZ_MODEM 0x0002 /* line 2 = modem */ -#define DZ_PRINTER 0x0003 /* line 3 = printer */ - -#define DZ_CSIZE 0x0018 /* Number of bits per byte (mask) */ -#define DZ_CS5 0x0000 /* 5 bits per byte */ -#define DZ_CS6 0x0008 /* 6 bits per byte */ -#define DZ_CS7 0x0010 /* 7 bits per byte */ -#define DZ_CS8 0x0018 /* 8 bits per byte */ - -#define DZ_CSTOPB 0x0020 /* 2 stop bits instead of one */ - -#define DZ_PARENB 0x0040 /* Parity enable */ -#define DZ_PARODD 0x0080 /* Odd parity instead of even */ - -#define DZ_CBAUD 0x0E00 /* Baud Rate (mask) */ -#define DZ_B50 0x0000 -#define DZ_B75 0x0100 -#define DZ_B110 0x0200 -#define DZ_B134 0x0300 -#define DZ_B150 0x0400 -#define DZ_B300 0x0500 -#define DZ_B600 0x0600 -#define DZ_B1200 0x0700 -#define DZ_B1800 0x0800 -#define DZ_B2000 0x0900 -#define DZ_B2400 0x0A00 -#define DZ_B3600 0x0B00 -#define DZ_B4800 0x0C00 -#define DZ_B7200 0x0D00 -#define DZ_B9600 0x0E00 - -#define DZ_RXENAB 0x1000 /* Receiver Enable */ - -/* - * Addresses for the DZ registers - */ -#define DZ_CSR 0x00 /* Control and Status Register */ -#define DZ_RBUF 0x08 /* Receive Buffer */ -#define DZ_LPR 0x08 /* Line Parameters Register */ -#define DZ_TCR 0x10 /* Transmitter Control Register */ -#define DZ_MSR 0x18 /* Modem Status Register */ -#define DZ_TDR 0x18 /* Transmit Data Register */ - -#define DZ_NB_PORT 4 - -#define DZ_XMIT_SIZE 4096 /* buffer size */ -#define DZ_WAKEUP_CHARS DZ_XMIT_SIZE/4 - -#endif /* DZ_SERIAL_H */ diff --git a/drivers/serial/icom.c b/drivers/serial/icom.c deleted file mode 100644 index 53a468227056..000000000000 --- a/drivers/serial/icom.c +++ /dev/null @@ -1,1658 +0,0 @@ -/* - * icom.c - * - * Copyright (C) 2001 IBM Corporation. All rights reserved. - * - * Serial device driver. - * - * Based on code from serial.c - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ -#define SERIAL_DO_RESTART -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/signal.h> -#include <linux/timer.h> -#include <linux/interrupt.h> -#include <linux/tty.h> -#include <linux/termios.h> -#include <linux/fs.h> -#include <linux/tty_flip.h> -#include <linux/serial.h> -#include <linux/serial_reg.h> -#include <linux/major.h> -#include <linux/string.h> -#include <linux/fcntl.h> -#include <linux/ptrace.h> -#include <linux/ioport.h> -#include <linux/mm.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/pci.h> -#include <linux/vmalloc.h> -#include <linux/smp.h> -#include <linux/spinlock.h> -#include <linux/kref.h> -#include <linux/firmware.h> -#include <linux/bitops.h> - -#include <asm/system.h> -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/uaccess.h> - -#include "icom.h" - -/*#define ICOM_TRACE enable port trace capabilities */ - -#define ICOM_DRIVER_NAME "icom" -#define ICOM_VERSION_STR "1.3.1" -#define NR_PORTS 128 -#define ICOM_PORT ((struct icom_port *)port) -#define to_icom_adapter(d) container_of(d, struct icom_adapter, kref) - -static const struct pci_device_id icom_pci_table[] = { - { - .vendor = PCI_VENDOR_ID_IBM, - .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_1, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - .driver_data = ADAPTER_V1, - }, - { - .vendor = PCI_VENDOR_ID_IBM, - .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2, - .subvendor = PCI_VENDOR_ID_IBM, - .subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_TWO_PORTS_RVX, - .driver_data = ADAPTER_V2, - }, - { - .vendor = PCI_VENDOR_ID_IBM, - .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2, - .subvendor = PCI_VENDOR_ID_IBM, - .subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM, - .driver_data = ADAPTER_V2, - }, - { - .vendor = PCI_VENDOR_ID_IBM, - .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2, - .subvendor = PCI_VENDOR_ID_IBM, - .subdevice = PCI_DEVICE_ID_IBM_ICOM_FOUR_PORT_MODEL, - .driver_data = ADAPTER_V2, - }, - { - .vendor = PCI_VENDOR_ID_IBM, - .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2, - .subvendor = PCI_VENDOR_ID_IBM, - .subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM_PCIE, - .driver_data = ADAPTER_V2, - }, - {} -}; - -struct lookup_proc_table start_proc[4] = { - {NULL, ICOM_CONTROL_START_A}, - {NULL, ICOM_CONTROL_START_B}, - {NULL, ICOM_CONTROL_START_C}, - {NULL, ICOM_CONTROL_START_D} -}; - - -struct lookup_proc_table stop_proc[4] = { - {NULL, ICOM_CONTROL_STOP_A}, - {NULL, ICOM_CONTROL_STOP_B}, - {NULL, ICOM_CONTROL_STOP_C}, - {NULL, ICOM_CONTROL_STOP_D} -}; - -struct lookup_int_table int_mask_tbl[4] = { - {NULL, ICOM_INT_MASK_PRC_A}, - {NULL, ICOM_INT_MASK_PRC_B}, - {NULL, ICOM_INT_MASK_PRC_C}, - {NULL, ICOM_INT_MASK_PRC_D}, -}; - - -MODULE_DEVICE_TABLE(pci, icom_pci_table); - -static LIST_HEAD(icom_adapter_head); - -/* spinlock for adapter initialization and changing adapter operations */ -static spinlock_t icom_lock; - -#ifdef ICOM_TRACE -static inline void trace(struct icom_port *icom_port, char *trace_pt, - unsigned long trace_data) -{ - dev_info(&icom_port->adapter->pci_dev->dev, ":%d:%s - %lx\n", - icom_port->port, trace_pt, trace_data); -} -#else -static inline void trace(struct icom_port *icom_port, char *trace_pt, unsigned long trace_data) {}; -#endif -static void icom_kref_release(struct kref *kref); - -static void free_port_memory(struct icom_port *icom_port) -{ - struct pci_dev *dev = icom_port->adapter->pci_dev; - - trace(icom_port, "RET_PORT_MEM", 0); - if (icom_port->recv_buf) { - pci_free_consistent(dev, 4096, icom_port->recv_buf, - icom_port->recv_buf_pci); - icom_port->recv_buf = NULL; - } - if (icom_port->xmit_buf) { - pci_free_consistent(dev, 4096, icom_port->xmit_buf, - icom_port->xmit_buf_pci); - icom_port->xmit_buf = NULL; - } - if (icom_port->statStg) { - pci_free_consistent(dev, 4096, icom_port->statStg, - icom_port->statStg_pci); - icom_port->statStg = NULL; - } - - if (icom_port->xmitRestart) { - pci_free_consistent(dev, 4096, icom_port->xmitRestart, - icom_port->xmitRestart_pci); - icom_port->xmitRestart = NULL; - } -} - -static int __devinit get_port_memory(struct icom_port *icom_port) -{ - int index; - unsigned long stgAddr; - unsigned long startStgAddr; - unsigned long offset; - struct pci_dev *dev = icom_port->adapter->pci_dev; - - icom_port->xmit_buf = - pci_alloc_consistent(dev, 4096, &icom_port->xmit_buf_pci); - if (!icom_port->xmit_buf) { - dev_err(&dev->dev, "Can not allocate Transmit buffer\n"); - return -ENOMEM; - } - - trace(icom_port, "GET_PORT_MEM", - (unsigned long) icom_port->xmit_buf); - - icom_port->recv_buf = - pci_alloc_consistent(dev, 4096, &icom_port->recv_buf_pci); - if (!icom_port->recv_buf) { - dev_err(&dev->dev, "Can not allocate Receive buffer\n"); - free_port_memory(icom_port); - return -ENOMEM; - } - trace(icom_port, "GET_PORT_MEM", - (unsigned long) icom_port->recv_buf); - - icom_port->statStg = - pci_alloc_consistent(dev, 4096, &icom_port->statStg_pci); - if (!icom_port->statStg) { - dev_err(&dev->dev, "Can not allocate Status buffer\n"); - free_port_memory(icom_port); - return -ENOMEM; - } - trace(icom_port, "GET_PORT_MEM", - (unsigned long) icom_port->statStg); - - icom_port->xmitRestart = - pci_alloc_consistent(dev, 4096, &icom_port->xmitRestart_pci); - if (!icom_port->xmitRestart) { - dev_err(&dev->dev, - "Can not allocate xmit Restart buffer\n"); - free_port_memory(icom_port); - return -ENOMEM; - } - - memset(icom_port->statStg, 0, 4096); - - /* FODs: Frame Out Descriptor Queue, this is a FIFO queue that - indicates that frames are to be transmitted - */ - - stgAddr = (unsigned long) icom_port->statStg; - for (index = 0; index < NUM_XBUFFS; index++) { - trace(icom_port, "FOD_ADDR", stgAddr); - stgAddr = stgAddr + sizeof(icom_port->statStg->xmit[0]); - if (index < (NUM_XBUFFS - 1)) { - memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area)); - icom_port->statStg->xmit[index].leLengthASD = - (unsigned short int) cpu_to_le16(XMIT_BUFF_SZ); - trace(icom_port, "FOD_ADDR", stgAddr); - trace(icom_port, "FOD_XBUFF", - (unsigned long) icom_port->xmit_buf); - icom_port->statStg->xmit[index].leBuffer = - cpu_to_le32(icom_port->xmit_buf_pci); - } else if (index == (NUM_XBUFFS - 1)) { - memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area)); - icom_port->statStg->xmit[index].leLengthASD = - (unsigned short int) cpu_to_le16(XMIT_BUFF_SZ); - trace(icom_port, "FOD_XBUFF", - (unsigned long) icom_port->xmit_buf); - icom_port->statStg->xmit[index].leBuffer = - cpu_to_le32(icom_port->xmit_buf_pci); - } else { - memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area)); - } - } - /* FIDs */ - startStgAddr = stgAddr; - - /* fill in every entry, even if no buffer */ - for (index = 0; index < NUM_RBUFFS; index++) { - trace(icom_port, "FID_ADDR", stgAddr); - stgAddr = stgAddr + sizeof(icom_port->statStg->rcv[0]); - icom_port->statStg->rcv[index].leLength = 0; - icom_port->statStg->rcv[index].WorkingLength = - (unsigned short int) cpu_to_le16(RCV_BUFF_SZ); - if (index < (NUM_RBUFFS - 1) ) { - offset = stgAddr - (unsigned long) icom_port->statStg; - icom_port->statStg->rcv[index].leNext = - cpu_to_le32(icom_port-> statStg_pci + offset); - trace(icom_port, "FID_RBUFF", - (unsigned long) icom_port->recv_buf); - icom_port->statStg->rcv[index].leBuffer = - cpu_to_le32(icom_port->recv_buf_pci); - } else if (index == (NUM_RBUFFS -1) ) { - offset = startStgAddr - (unsigned long) icom_port->statStg; - icom_port->statStg->rcv[index].leNext = - cpu_to_le32(icom_port-> statStg_pci + offset); - trace(icom_port, "FID_RBUFF", - (unsigned long) icom_port->recv_buf + 2048); - icom_port->statStg->rcv[index].leBuffer = - cpu_to_le32(icom_port->recv_buf_pci + 2048); - } else { - icom_port->statStg->rcv[index].leNext = 0; - icom_port->statStg->rcv[index].leBuffer = 0; - } - } - - return 0; -} - -static void stop_processor(struct icom_port *icom_port) -{ - unsigned long temp; - unsigned long flags; - int port; - - spin_lock_irqsave(&icom_lock, flags); - - port = icom_port->port; - if (port == 0 || port == 1) - stop_proc[port].global_control_reg = &icom_port->global_reg->control; - else - stop_proc[port].global_control_reg = &icom_port->global_reg->control_2; - - - if (port < 4) { - temp = readl(stop_proc[port].global_control_reg); - temp = - (temp & ~start_proc[port].processor_id) | stop_proc[port].processor_id; - writel(temp, stop_proc[port].global_control_reg); - - /* write flush */ - readl(stop_proc[port].global_control_reg); - } else { - dev_err(&icom_port->adapter->pci_dev->dev, - "Invalid port assignment\n"); - } - - spin_unlock_irqrestore(&icom_lock, flags); -} - -static void start_processor(struct icom_port *icom_port) -{ - unsigned long temp; - unsigned long flags; - int port; - - spin_lock_irqsave(&icom_lock, flags); - - port = icom_port->port; - if (port == 0 || port == 1) - start_proc[port].global_control_reg = &icom_port->global_reg->control; - else - start_proc[port].global_control_reg = &icom_port->global_reg->control_2; - if (port < 4) { - temp = readl(start_proc[port].global_control_reg); - temp = - (temp & ~stop_proc[port].processor_id) | start_proc[port].processor_id; - writel(temp, start_proc[port].global_control_reg); - - /* write flush */ - readl(start_proc[port].global_control_reg); - } else { - dev_err(&icom_port->adapter->pci_dev->dev, - "Invalid port assignment\n"); - } - - spin_unlock_irqrestore(&icom_lock, flags); -} - -static void load_code(struct icom_port *icom_port) -{ - const struct firmware *fw; - char __iomem *iram_ptr; - int index; - int status = 0; - void __iomem *dram_ptr = icom_port->dram; - dma_addr_t temp_pci; - unsigned char *new_page = NULL; - unsigned char cable_id = NO_CABLE; - struct pci_dev *dev = icom_port->adapter->pci_dev; - - /* Clear out any pending interrupts */ - writew(0x3FFF, icom_port->int_reg); - - trace(icom_port, "CLEAR_INTERRUPTS", 0); - - /* Stop processor */ - stop_processor(icom_port); - - /* Zero out DRAM */ - memset_io(dram_ptr, 0, 512); - - /* Load Call Setup into Adapter */ - if (request_firmware(&fw, "icom_call_setup.bin", &dev->dev) < 0) { - dev_err(&dev->dev,"Unable to load icom_call_setup.bin firmware image\n"); - status = -1; - goto load_code_exit; - } - - if (fw->size > ICOM_DCE_IRAM_OFFSET) { - dev_err(&dev->dev, "Invalid firmware image for icom_call_setup.bin found.\n"); - release_firmware(fw); - status = -1; - goto load_code_exit; - } - - iram_ptr = (char __iomem *)icom_port->dram + ICOM_IRAM_OFFSET; - for (index = 0; index < fw->size; index++) - writeb(fw->data[index], &iram_ptr[index]); - - release_firmware(fw); - - /* Load Resident DCE portion of Adapter */ - if (request_firmware(&fw, "icom_res_dce.bin", &dev->dev) < 0) { - dev_err(&dev->dev,"Unable to load icom_res_dce.bin firmware image\n"); - status = -1; - goto load_code_exit; - } - - if (fw->size > ICOM_IRAM_SIZE) { - dev_err(&dev->dev, "Invalid firmware image for icom_res_dce.bin found.\n"); - release_firmware(fw); - status = -1; - goto load_code_exit; - } - - iram_ptr = (char __iomem *) icom_port->dram + ICOM_IRAM_OFFSET; - for (index = ICOM_DCE_IRAM_OFFSET; index < fw->size; index++) - writeb(fw->data[index], &iram_ptr[index]); - - release_firmware(fw); - - /* Set Hardware level */ - if (icom_port->adapter->version == ADAPTER_V2) - writeb(V2_HARDWARE, &(icom_port->dram->misc_flags)); - - /* Start the processor in Adapter */ - start_processor(icom_port); - - writeb((HDLC_PPP_PURE_ASYNC | HDLC_FF_FILL), - &(icom_port->dram->HDLCConfigReg)); - writeb(0x04, &(icom_port->dram->FlagFillIdleTimer)); /* 0.5 seconds */ - writeb(0x00, &(icom_port->dram->CmdReg)); - writeb(0x10, &(icom_port->dram->async_config3)); - writeb((ICOM_ACFG_DRIVE1 | ICOM_ACFG_NO_PARITY | ICOM_ACFG_8BPC | - ICOM_ACFG_1STOP_BIT), &(icom_port->dram->async_config2)); - - /*Set up data in icom DRAM to indicate where personality - *code is located and its length. - */ - new_page = pci_alloc_consistent(dev, 4096, &temp_pci); - - if (!new_page) { - dev_err(&dev->dev, "Can not allocate DMA buffer\n"); - status = -1; - goto load_code_exit; - } - - if (request_firmware(&fw, "icom_asc.bin", &dev->dev) < 0) { - dev_err(&dev->dev,"Unable to load icom_asc.bin firmware image\n"); - status = -1; - goto load_code_exit; - } - - if (fw->size > ICOM_DCE_IRAM_OFFSET) { - dev_err(&dev->dev, "Invalid firmware image for icom_asc.bin found.\n"); - release_firmware(fw); - status = -1; - goto load_code_exit; - } - - for (index = 0; index < fw->size; index++) - new_page[index] = fw->data[index]; - - release_firmware(fw); - - writeb((char) ((fw->size + 16)/16), &icom_port->dram->mac_length); - writel(temp_pci, &icom_port->dram->mac_load_addr); - - /*Setting the syncReg to 0x80 causes adapter to start downloading - the personality code into adapter instruction RAM. - Once code is loaded, it will begin executing and, based on - information provided above, will start DMAing data from - shared memory to adapter DRAM. - */ - /* the wait loop below verifies this write operation has been done - and processed - */ - writeb(START_DOWNLOAD, &icom_port->dram->sync); - - /* Wait max 1 Sec for data download and processor to start */ - for (index = 0; index < 10; index++) { - msleep(100); - if (readb(&icom_port->dram->misc_flags) & ICOM_HDW_ACTIVE) - break; - } - - if (index == 10) - status = -1; - - /* - * check Cable ID - */ - cable_id = readb(&icom_port->dram->cable_id); - - if (cable_id & ICOM_CABLE_ID_VALID) { - /* Get cable ID into the lower 4 bits (standard form) */ - cable_id = (cable_id & ICOM_CABLE_ID_MASK) >> 4; - icom_port->cable_id = cable_id; - } else { - dev_err(&dev->dev,"Invalid or no cable attached\n"); - icom_port->cable_id = NO_CABLE; - } - - load_code_exit: - - if (status != 0) { - /* Clear out any pending interrupts */ - writew(0x3FFF, icom_port->int_reg); - - /* Turn off port */ - writeb(ICOM_DISABLE, &(icom_port->dram->disable)); - - /* Stop processor */ - stop_processor(icom_port); - - dev_err(&icom_port->adapter->pci_dev->dev,"Port not opertional\n"); - } - - if (new_page != NULL) - pci_free_consistent(dev, 4096, new_page, temp_pci); -} - -static int startup(struct icom_port *icom_port) -{ - unsigned long temp; - unsigned char cable_id, raw_cable_id; - unsigned long flags; - int port; - - trace(icom_port, "STARTUP", 0); - - if (!icom_port->dram) { - /* should NEVER be NULL */ - dev_err(&icom_port->adapter->pci_dev->dev, - "Unusable Port, port configuration missing\n"); - return -ENODEV; - } - - /* - * check Cable ID - */ - raw_cable_id = readb(&icom_port->dram->cable_id); - trace(icom_port, "CABLE_ID", raw_cable_id); - - /* Get cable ID into the lower 4 bits (standard form) */ - cable_id = (raw_cable_id & ICOM_CABLE_ID_MASK) >> 4; - - /* Check for valid Cable ID */ - if (!(raw_cable_id & ICOM_CABLE_ID_VALID) || - (cable_id != icom_port->cable_id)) { - - /* reload adapter code, pick up any potential changes in cable id */ - load_code(icom_port); - - /* still no sign of cable, error out */ - raw_cable_id = readb(&icom_port->dram->cable_id); - cable_id = (raw_cable_id & ICOM_CABLE_ID_MASK) >> 4; - if (!(raw_cable_id & ICOM_CABLE_ID_VALID) || - (icom_port->cable_id == NO_CABLE)) - return -EIO; - } - - /* - * Finally, clear and enable interrupts - */ - spin_lock_irqsave(&icom_lock, flags); - port = icom_port->port; - if (port == 0 || port == 1) - int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask; - else - int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask_2; - - if (port == 0 || port == 2) - writew(0x00FF, icom_port->int_reg); - else - writew(0x3F00, icom_port->int_reg); - if (port < 4) { - temp = readl(int_mask_tbl[port].global_int_mask); - writel(temp & ~int_mask_tbl[port].processor_id, int_mask_tbl[port].global_int_mask); - - /* write flush */ - readl(int_mask_tbl[port].global_int_mask); - } else { - dev_err(&icom_port->adapter->pci_dev->dev, - "Invalid port assignment\n"); - } - - spin_unlock_irqrestore(&icom_lock, flags); - return 0; -} - -static void shutdown(struct icom_port *icom_port) -{ - unsigned long temp; - unsigned char cmdReg; - unsigned long flags; - int port; - - spin_lock_irqsave(&icom_lock, flags); - trace(icom_port, "SHUTDOWN", 0); - - /* - * disable all interrupts - */ - port = icom_port->port; - if (port == 0 || port == 1) - int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask; - else - int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask_2; - - if (port < 4) { - temp = readl(int_mask_tbl[port].global_int_mask); - writel(temp | int_mask_tbl[port].processor_id, int_mask_tbl[port].global_int_mask); - - /* write flush */ - readl(int_mask_tbl[port].global_int_mask); - } else { - dev_err(&icom_port->adapter->pci_dev->dev, - "Invalid port assignment\n"); - } - spin_unlock_irqrestore(&icom_lock, flags); - - /* - * disable break condition - */ - cmdReg = readb(&icom_port->dram->CmdReg); - if (cmdReg & CMD_SND_BREAK) { - writeb(cmdReg & ~CMD_SND_BREAK, &icom_port->dram->CmdReg); - } -} - -static int icom_write(struct uart_port *port) -{ - unsigned long data_count; - unsigned char cmdReg; - unsigned long offset; - int temp_tail = port->state->xmit.tail; - - trace(ICOM_PORT, "WRITE", 0); - - if (cpu_to_le16(ICOM_PORT->statStg->xmit[0].flags) & - SA_FLAGS_READY_TO_XMIT) { - trace(ICOM_PORT, "WRITE_FULL", 0); - return 0; - } - - data_count = 0; - while ((port->state->xmit.head != temp_tail) && - (data_count <= XMIT_BUFF_SZ)) { - - ICOM_PORT->xmit_buf[data_count++] = - port->state->xmit.buf[temp_tail]; - - temp_tail++; - temp_tail &= (UART_XMIT_SIZE - 1); - } - - if (data_count) { - ICOM_PORT->statStg->xmit[0].flags = - cpu_to_le16(SA_FLAGS_READY_TO_XMIT); - ICOM_PORT->statStg->xmit[0].leLength = - cpu_to_le16(data_count); - offset = - (unsigned long) &ICOM_PORT->statStg->xmit[0] - - (unsigned long) ICOM_PORT->statStg; - *ICOM_PORT->xmitRestart = - cpu_to_le32(ICOM_PORT->statStg_pci + offset); - cmdReg = readb(&ICOM_PORT->dram->CmdReg); - writeb(cmdReg | CMD_XMIT_RCV_ENABLE, - &ICOM_PORT->dram->CmdReg); - writeb(START_XMIT, &ICOM_PORT->dram->StartXmitCmd); - trace(ICOM_PORT, "WRITE_START", data_count); - /* write flush */ - readb(&ICOM_PORT->dram->StartXmitCmd); - } - - return data_count; -} - -static inline void check_modem_status(struct icom_port *icom_port) -{ - static char old_status = 0; - char delta_status; - unsigned char status; - - spin_lock(&icom_port->uart_port.lock); - - /*modem input register */ - status = readb(&icom_port->dram->isr); - trace(icom_port, "CHECK_MODEM", status); - delta_status = status ^ old_status; - if (delta_status) { - if (delta_status & ICOM_RI) - icom_port->uart_port.icount.rng++; - if (delta_status & ICOM_DSR) - icom_port->uart_port.icount.dsr++; - if (delta_status & ICOM_DCD) - uart_handle_dcd_change(&icom_port->uart_port, - delta_status & ICOM_DCD); - if (delta_status & ICOM_CTS) - uart_handle_cts_change(&icom_port->uart_port, - delta_status & ICOM_CTS); - - wake_up_interruptible(&icom_port->uart_port.state-> - port.delta_msr_wait); - old_status = status; - } - spin_unlock(&icom_port->uart_port.lock); -} - -static void xmit_interrupt(u16 port_int_reg, struct icom_port *icom_port) -{ - unsigned short int count; - int i; - - if (port_int_reg & (INT_XMIT_COMPLETED)) { - trace(icom_port, "XMIT_COMPLETE", 0); - - /* clear buffer in use bit */ - icom_port->statStg->xmit[0].flags &= - cpu_to_le16(~SA_FLAGS_READY_TO_XMIT); - - count = (unsigned short int) - cpu_to_le16(icom_port->statStg->xmit[0].leLength); - icom_port->uart_port.icount.tx += count; - - for (i=0; i<count && - !uart_circ_empty(&icom_port->uart_port.state->xmit); i++) { - - icom_port->uart_port.state->xmit.tail++; - icom_port->uart_port.state->xmit.tail &= - (UART_XMIT_SIZE - 1); - } - - if (!icom_write(&icom_port->uart_port)) - /* activate write queue */ - uart_write_wakeup(&icom_port->uart_port); - } else - trace(icom_port, "XMIT_DISABLED", 0); -} - -static void recv_interrupt(u16 port_int_reg, struct icom_port *icom_port) -{ - short int count, rcv_buff; - struct tty_struct *tty = icom_port->uart_port.state->port.tty; - unsigned short int status; - struct uart_icount *icount; - unsigned long offset; - unsigned char flag; - - trace(icom_port, "RCV_COMPLETE", 0); - rcv_buff = icom_port->next_rcv; - - status = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].flags); - while (status & SA_FL_RCV_DONE) { - int first = -1; - - trace(icom_port, "FID_STATUS", status); - count = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].leLength); - - trace(icom_port, "RCV_COUNT", count); - - trace(icom_port, "REAL_COUNT", count); - - offset = - cpu_to_le32(icom_port->statStg->rcv[rcv_buff].leBuffer) - - icom_port->recv_buf_pci; - - /* Block copy all but the last byte as this may have status */ - if (count > 0) { - first = icom_port->recv_buf[offset]; - tty_insert_flip_string(tty, icom_port->recv_buf + offset, count - 1); - } - - icount = &icom_port->uart_port.icount; - icount->rx += count; - - /* Break detect logic */ - if ((status & SA_FLAGS_FRAME_ERROR) - && first == 0) { - status &= ~SA_FLAGS_FRAME_ERROR; - status |= SA_FLAGS_BREAK_DET; - trace(icom_port, "BREAK_DET", 0); - } - - flag = TTY_NORMAL; - - if (status & - (SA_FLAGS_BREAK_DET | SA_FLAGS_PARITY_ERROR | - SA_FLAGS_FRAME_ERROR | SA_FLAGS_OVERRUN)) { - - if (status & SA_FLAGS_BREAK_DET) - icount->brk++; - if (status & SA_FLAGS_PARITY_ERROR) - icount->parity++; - if (status & SA_FLAGS_FRAME_ERROR) - icount->frame++; - if (status & SA_FLAGS_OVERRUN) - icount->overrun++; - - /* - * Now check to see if character should be - * ignored, and mask off conditions which - * should be ignored. - */ - if (status & icom_port->ignore_status_mask) { - trace(icom_port, "IGNORE_CHAR", 0); - goto ignore_char; - } - - status &= icom_port->read_status_mask; - - if (status & SA_FLAGS_BREAK_DET) { - flag = TTY_BREAK; - } else if (status & SA_FLAGS_PARITY_ERROR) { - trace(icom_port, "PARITY_ERROR", 0); - flag = TTY_PARITY; - } else if (status & SA_FLAGS_FRAME_ERROR) - flag = TTY_FRAME; - - } - - tty_insert_flip_char(tty, *(icom_port->recv_buf + offset + count - 1), flag); - - if (status & SA_FLAGS_OVERRUN) - /* - * Overrun is special, since it's - * reported immediately, and doesn't - * affect the current character - */ - tty_insert_flip_char(tty, 0, TTY_OVERRUN); -ignore_char: - icom_port->statStg->rcv[rcv_buff].flags = 0; - icom_port->statStg->rcv[rcv_buff].leLength = 0; - icom_port->statStg->rcv[rcv_buff].WorkingLength = - (unsigned short int) cpu_to_le16(RCV_BUFF_SZ); - - rcv_buff++; - if (rcv_buff == NUM_RBUFFS) - rcv_buff = 0; - - status = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].flags); - } - icom_port->next_rcv = rcv_buff; - tty_flip_buffer_push(tty); -} - -static void process_interrupt(u16 port_int_reg, - struct icom_port *icom_port) -{ - - spin_lock(&icom_port->uart_port.lock); - trace(icom_port, "INTERRUPT", port_int_reg); - - if (port_int_reg & (INT_XMIT_COMPLETED | INT_XMIT_DISABLED)) - xmit_interrupt(port_int_reg, icom_port); - - if (port_int_reg & INT_RCV_COMPLETED) - recv_interrupt(port_int_reg, icom_port); - - spin_unlock(&icom_port->uart_port.lock); -} - -static irqreturn_t icom_interrupt(int irq, void *dev_id) -{ - void __iomem * int_reg; - u32 adapter_interrupts; - u16 port_int_reg; - struct icom_adapter *icom_adapter; - struct icom_port *icom_port; - - /* find icom_port for this interrupt */ - icom_adapter = (struct icom_adapter *) dev_id; - - if (icom_adapter->version == ADAPTER_V2) { - int_reg = icom_adapter->base_addr + 0x8024; - - adapter_interrupts = readl(int_reg); - - if (adapter_interrupts & 0x00003FFF) { - /* port 2 interrupt, NOTE: for all ADAPTER_V2, port 2 will be active */ - icom_port = &icom_adapter->port_info[2]; - port_int_reg = (u16) adapter_interrupts; - process_interrupt(port_int_reg, icom_port); - check_modem_status(icom_port); - } - if (adapter_interrupts & 0x3FFF0000) { - /* port 3 interrupt */ - icom_port = &icom_adapter->port_info[3]; - if (icom_port->status == ICOM_PORT_ACTIVE) { - port_int_reg = - (u16) (adapter_interrupts >> 16); - process_interrupt(port_int_reg, icom_port); - check_modem_status(icom_port); - } - } - - /* Clear out any pending interrupts */ - writel(adapter_interrupts, int_reg); - - int_reg = icom_adapter->base_addr + 0x8004; - } else { - int_reg = icom_adapter->base_addr + 0x4004; - } - - adapter_interrupts = readl(int_reg); - - if (adapter_interrupts & 0x00003FFF) { - /* port 0 interrupt, NOTE: for all adapters, port 0 will be active */ - icom_port = &icom_adapter->port_info[0]; - port_int_reg = (u16) adapter_interrupts; - process_interrupt(port_int_reg, icom_port); - check_modem_status(icom_port); - } - if (adapter_interrupts & 0x3FFF0000) { - /* port 1 interrupt */ - icom_port = &icom_adapter->port_info[1]; - if (icom_port->status == ICOM_PORT_ACTIVE) { - port_int_reg = (u16) (adapter_interrupts >> 16); - process_interrupt(port_int_reg, icom_port); - check_modem_status(icom_port); - } - } - - /* Clear out any pending interrupts */ - writel(adapter_interrupts, int_reg); - - /* flush the write */ - adapter_interrupts = readl(int_reg); - - return IRQ_HANDLED; -} - -/* - * ------------------------------------------------------------------ - * Begin serial-core API - * ------------------------------------------------------------------ - */ -static unsigned int icom_tx_empty(struct uart_port *port) -{ - int ret; - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - if (cpu_to_le16(ICOM_PORT->statStg->xmit[0].flags) & - SA_FLAGS_READY_TO_XMIT) - ret = TIOCSER_TEMT; - else - ret = 0; - - spin_unlock_irqrestore(&port->lock, flags); - return ret; -} - -static void icom_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - unsigned char local_osr; - - trace(ICOM_PORT, "SET_MODEM", 0); - local_osr = readb(&ICOM_PORT->dram->osr); - - if (mctrl & TIOCM_RTS) { - trace(ICOM_PORT, "RAISE_RTS", 0); - local_osr |= ICOM_RTS; - } else { - trace(ICOM_PORT, "LOWER_RTS", 0); - local_osr &= ~ICOM_RTS; - } - - if (mctrl & TIOCM_DTR) { - trace(ICOM_PORT, "RAISE_DTR", 0); - local_osr |= ICOM_DTR; - } else { - trace(ICOM_PORT, "LOWER_DTR", 0); - local_osr &= ~ICOM_DTR; - } - - writeb(local_osr, &ICOM_PORT->dram->osr); -} - -static unsigned int icom_get_mctrl(struct uart_port *port) -{ - unsigned char status; - unsigned int result; - - trace(ICOM_PORT, "GET_MODEM", 0); - - status = readb(&ICOM_PORT->dram->isr); - - result = ((status & ICOM_DCD) ? TIOCM_CAR : 0) - | ((status & ICOM_RI) ? TIOCM_RNG : 0) - | ((status & ICOM_DSR) ? TIOCM_DSR : 0) - | ((status & ICOM_CTS) ? TIOCM_CTS : 0); - return result; -} - -static void icom_stop_tx(struct uart_port *port) -{ - unsigned char cmdReg; - - trace(ICOM_PORT, "STOP", 0); - cmdReg = readb(&ICOM_PORT->dram->CmdReg); - writeb(cmdReg | CMD_HOLD_XMIT, &ICOM_PORT->dram->CmdReg); -} - -static void icom_start_tx(struct uart_port *port) -{ - unsigned char cmdReg; - - trace(ICOM_PORT, "START", 0); - cmdReg = readb(&ICOM_PORT->dram->CmdReg); - if ((cmdReg & CMD_HOLD_XMIT) == CMD_HOLD_XMIT) - writeb(cmdReg & ~CMD_HOLD_XMIT, - &ICOM_PORT->dram->CmdReg); - - icom_write(port); -} - -static void icom_send_xchar(struct uart_port *port, char ch) -{ - unsigned char xdata; - int index; - unsigned long flags; - - trace(ICOM_PORT, "SEND_XCHAR", ch); - - /* wait .1 sec to send char */ - for (index = 0; index < 10; index++) { - spin_lock_irqsave(&port->lock, flags); - xdata = readb(&ICOM_PORT->dram->xchar); - if (xdata == 0x00) { - trace(ICOM_PORT, "QUICK_WRITE", 0); - writeb(ch, &ICOM_PORT->dram->xchar); - - /* flush write operation */ - xdata = readb(&ICOM_PORT->dram->xchar); - spin_unlock_irqrestore(&port->lock, flags); - break; - } - spin_unlock_irqrestore(&port->lock, flags); - msleep(10); - } -} - -static void icom_stop_rx(struct uart_port *port) -{ - unsigned char cmdReg; - - cmdReg = readb(&ICOM_PORT->dram->CmdReg); - writeb(cmdReg & ~CMD_RCV_ENABLE, &ICOM_PORT->dram->CmdReg); -} - -static void icom_enable_ms(struct uart_port *port) -{ - /* no-op */ -} - -static void icom_break(struct uart_port *port, int break_state) -{ - unsigned char cmdReg; - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - trace(ICOM_PORT, "BREAK", 0); - cmdReg = readb(&ICOM_PORT->dram->CmdReg); - if (break_state == -1) { - writeb(cmdReg | CMD_SND_BREAK, &ICOM_PORT->dram->CmdReg); - } else { - writeb(cmdReg & ~CMD_SND_BREAK, &ICOM_PORT->dram->CmdReg); - } - spin_unlock_irqrestore(&port->lock, flags); -} - -static int icom_open(struct uart_port *port) -{ - int retval; - - kref_get(&ICOM_PORT->adapter->kref); - retval = startup(ICOM_PORT); - - if (retval) { - kref_put(&ICOM_PORT->adapter->kref, icom_kref_release); - trace(ICOM_PORT, "STARTUP_ERROR", 0); - return retval; - } - - return 0; -} - -static void icom_close(struct uart_port *port) -{ - unsigned char cmdReg; - - trace(ICOM_PORT, "CLOSE", 0); - - /* stop receiver */ - cmdReg = readb(&ICOM_PORT->dram->CmdReg); - writeb(cmdReg & (unsigned char) ~CMD_RCV_ENABLE, - &ICOM_PORT->dram->CmdReg); - - shutdown(ICOM_PORT); - - kref_put(&ICOM_PORT->adapter->kref, icom_kref_release); -} - -static void icom_set_termios(struct uart_port *port, - struct ktermios *termios, - struct ktermios *old_termios) -{ - int baud; - unsigned cflag, iflag; - char new_config2; - char new_config3 = 0; - char tmp_byte; - int index; - int rcv_buff, xmit_buff; - unsigned long offset; - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - trace(ICOM_PORT, "CHANGE_SPEED", 0); - - cflag = termios->c_cflag; - iflag = termios->c_iflag; - - new_config2 = ICOM_ACFG_DRIVE1; - - /* byte size and parity */ - switch (cflag & CSIZE) { - case CS5: /* 5 bits/char */ - new_config2 |= ICOM_ACFG_5BPC; - break; - case CS6: /* 6 bits/char */ - new_config2 |= ICOM_ACFG_6BPC; - break; - case CS7: /* 7 bits/char */ - new_config2 |= ICOM_ACFG_7BPC; - break; - case CS8: /* 8 bits/char */ - new_config2 |= ICOM_ACFG_8BPC; - break; - default: - break; - } - if (cflag & CSTOPB) { - /* 2 stop bits */ - new_config2 |= ICOM_ACFG_2STOP_BIT; - } - if (cflag & PARENB) { - /* parity bit enabled */ - new_config2 |= ICOM_ACFG_PARITY_ENAB; - trace(ICOM_PORT, "PARENB", 0); - } - if (cflag & PARODD) { - /* odd parity */ - new_config2 |= ICOM_ACFG_PARITY_ODD; - trace(ICOM_PORT, "PARODD", 0); - } - - /* Determine divisor based on baud rate */ - baud = uart_get_baud_rate(port, termios, old_termios, - icom_acfg_baud[0], - icom_acfg_baud[BAUD_TABLE_LIMIT]); - if (!baud) - baud = 9600; /* B0 transition handled in rs_set_termios */ - - for (index = 0; index < BAUD_TABLE_LIMIT; index++) { - if (icom_acfg_baud[index] == baud) { - new_config3 = index; - break; - } - } - - uart_update_timeout(port, cflag, baud); - - /* CTS flow control flag and modem status interrupts */ - tmp_byte = readb(&(ICOM_PORT->dram->HDLCConfigReg)); - if (cflag & CRTSCTS) - tmp_byte |= HDLC_HDW_FLOW; - else - tmp_byte &= ~HDLC_HDW_FLOW; - writeb(tmp_byte, &(ICOM_PORT->dram->HDLCConfigReg)); - - /* - * Set up parity check flag - */ - ICOM_PORT->read_status_mask = SA_FLAGS_OVERRUN | SA_FL_RCV_DONE; - if (iflag & INPCK) - ICOM_PORT->read_status_mask |= - SA_FLAGS_FRAME_ERROR | SA_FLAGS_PARITY_ERROR; - - if ((iflag & BRKINT) || (iflag & PARMRK)) - ICOM_PORT->read_status_mask |= SA_FLAGS_BREAK_DET; - - /* - * Characters to ignore - */ - ICOM_PORT->ignore_status_mask = 0; - if (iflag & IGNPAR) - ICOM_PORT->ignore_status_mask |= - SA_FLAGS_PARITY_ERROR | SA_FLAGS_FRAME_ERROR; - if (iflag & IGNBRK) { - ICOM_PORT->ignore_status_mask |= SA_FLAGS_BREAK_DET; - /* - * If we're ignore parity and break indicators, ignore - * overruns too. (For real raw support). - */ - if (iflag & IGNPAR) - ICOM_PORT->ignore_status_mask |= SA_FLAGS_OVERRUN; - } - - /* - * !!! ignore all characters if CREAD is not set - */ - if ((cflag & CREAD) == 0) - ICOM_PORT->ignore_status_mask |= SA_FL_RCV_DONE; - - /* Turn off Receiver to prepare for reset */ - writeb(CMD_RCV_DISABLE, &ICOM_PORT->dram->CmdReg); - - for (index = 0; index < 10; index++) { - if (readb(&ICOM_PORT->dram->PrevCmdReg) == 0x00) { - break; - } - } - - /* clear all current buffers of data */ - for (rcv_buff = 0; rcv_buff < NUM_RBUFFS; rcv_buff++) { - ICOM_PORT->statStg->rcv[rcv_buff].flags = 0; - ICOM_PORT->statStg->rcv[rcv_buff].leLength = 0; - ICOM_PORT->statStg->rcv[rcv_buff].WorkingLength = - (unsigned short int) cpu_to_le16(RCV_BUFF_SZ); - } - - for (xmit_buff = 0; xmit_buff < NUM_XBUFFS; xmit_buff++) { - ICOM_PORT->statStg->xmit[xmit_buff].flags = 0; - } - - /* activate changes and start xmit and receiver here */ - /* Enable the receiver */ - writeb(new_config3, &(ICOM_PORT->dram->async_config3)); - writeb(new_config2, &(ICOM_PORT->dram->async_config2)); - tmp_byte = readb(&(ICOM_PORT->dram->HDLCConfigReg)); - tmp_byte |= HDLC_PPP_PURE_ASYNC | HDLC_FF_FILL; - writeb(tmp_byte, &(ICOM_PORT->dram->HDLCConfigReg)); - writeb(0x04, &(ICOM_PORT->dram->FlagFillIdleTimer)); /* 0.5 seconds */ - writeb(0xFF, &(ICOM_PORT->dram->ier)); /* enable modem signal interrupts */ - - /* reset processor */ - writeb(CMD_RESTART, &ICOM_PORT->dram->CmdReg); - - for (index = 0; index < 10; index++) { - if (readb(&ICOM_PORT->dram->CmdReg) == 0x00) { - break; - } - } - - /* Enable Transmitter and Reciever */ - offset = - (unsigned long) &ICOM_PORT->statStg->rcv[0] - - (unsigned long) ICOM_PORT->statStg; - writel(ICOM_PORT->statStg_pci + offset, - &ICOM_PORT->dram->RcvStatusAddr); - ICOM_PORT->next_rcv = 0; - ICOM_PORT->put_length = 0; - *ICOM_PORT->xmitRestart = 0; - writel(ICOM_PORT->xmitRestart_pci, - &ICOM_PORT->dram->XmitStatusAddr); - trace(ICOM_PORT, "XR_ENAB", 0); - writeb(CMD_XMIT_RCV_ENABLE, &ICOM_PORT->dram->CmdReg); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *icom_type(struct uart_port *port) -{ - return "icom"; -} - -static void icom_release_port(struct uart_port *port) -{ -} - -static int icom_request_port(struct uart_port *port) -{ - return 0; -} - -static void icom_config_port(struct uart_port *port, int flags) -{ - port->type = PORT_ICOM; -} - -static struct uart_ops icom_ops = { - .tx_empty = icom_tx_empty, - .set_mctrl = icom_set_mctrl, - .get_mctrl = icom_get_mctrl, - .stop_tx = icom_stop_tx, - .start_tx = icom_start_tx, - .send_xchar = icom_send_xchar, - .stop_rx = icom_stop_rx, - .enable_ms = icom_enable_ms, - .break_ctl = icom_break, - .startup = icom_open, - .shutdown = icom_close, - .set_termios = icom_set_termios, - .type = icom_type, - .release_port = icom_release_port, - .request_port = icom_request_port, - .config_port = icom_config_port, -}; - -#define ICOM_CONSOLE NULL - -static struct uart_driver icom_uart_driver = { - .owner = THIS_MODULE, - .driver_name = ICOM_DRIVER_NAME, - .dev_name = "ttyA", - .major = ICOM_MAJOR, - .minor = ICOM_MINOR_START, - .nr = NR_PORTS, - .cons = ICOM_CONSOLE, -}; - -static int __devinit icom_init_ports(struct icom_adapter *icom_adapter) -{ - u32 subsystem_id = icom_adapter->subsystem_id; - int i; - struct icom_port *icom_port; - - if (icom_adapter->version == ADAPTER_V1) { - icom_adapter->numb_ports = 2; - - for (i = 0; i < 2; i++) { - icom_port = &icom_adapter->port_info[i]; - icom_port->port = i; - icom_port->status = ICOM_PORT_ACTIVE; - icom_port->imbed_modem = ICOM_UNKNOWN; - } - } else { - if (subsystem_id == PCI_DEVICE_ID_IBM_ICOM_FOUR_PORT_MODEL) { - icom_adapter->numb_ports = 4; - - for (i = 0; i < 4; i++) { - icom_port = &icom_adapter->port_info[i]; - - icom_port->port = i; - icom_port->status = ICOM_PORT_ACTIVE; - icom_port->imbed_modem = ICOM_IMBED_MODEM; - } - } else { - icom_adapter->numb_ports = 4; - - icom_adapter->port_info[0].port = 0; - icom_adapter->port_info[0].status = ICOM_PORT_ACTIVE; - - if (subsystem_id == - PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM) { - icom_adapter->port_info[0].imbed_modem = ICOM_IMBED_MODEM; - } else { - icom_adapter->port_info[0].imbed_modem = ICOM_RVX; - } - - icom_adapter->port_info[1].status = ICOM_PORT_OFF; - - icom_adapter->port_info[2].port = 2; - icom_adapter->port_info[2].status = ICOM_PORT_ACTIVE; - icom_adapter->port_info[2].imbed_modem = ICOM_RVX; - icom_adapter->port_info[3].status = ICOM_PORT_OFF; - } - } - - return 0; -} - -static void icom_port_active(struct icom_port *icom_port, struct icom_adapter *icom_adapter, int port_num) -{ - if (icom_adapter->version == ADAPTER_V1) { - icom_port->global_reg = icom_adapter->base_addr + 0x4000; - icom_port->int_reg = icom_adapter->base_addr + - 0x4004 + 2 - 2 * port_num; - } else { - icom_port->global_reg = icom_adapter->base_addr + 0x8000; - if (icom_port->port < 2) - icom_port->int_reg = icom_adapter->base_addr + - 0x8004 + 2 - 2 * icom_port->port; - else - icom_port->int_reg = icom_adapter->base_addr + - 0x8024 + 2 - 2 * (icom_port->port - 2); - } -} -static int __devinit icom_load_ports(struct icom_adapter *icom_adapter) -{ - struct icom_port *icom_port; - int port_num; - - for (port_num = 0; port_num < icom_adapter->numb_ports; port_num++) { - - icom_port = &icom_adapter->port_info[port_num]; - - if (icom_port->status == ICOM_PORT_ACTIVE) { - icom_port_active(icom_port, icom_adapter, port_num); - icom_port->dram = icom_adapter->base_addr + - 0x2000 * icom_port->port; - - icom_port->adapter = icom_adapter; - - /* get port memory */ - if (get_port_memory(icom_port) != 0) { - dev_err(&icom_port->adapter->pci_dev->dev, - "Memory allocation for port FAILED\n"); - } - } - } - return 0; -} - -static int __devinit icom_alloc_adapter(struct icom_adapter - **icom_adapter_ref) -{ - int adapter_count = 0; - struct icom_adapter *icom_adapter; - struct icom_adapter *cur_adapter_entry; - struct list_head *tmp; - - icom_adapter = (struct icom_adapter *) - kzalloc(sizeof(struct icom_adapter), GFP_KERNEL); - - if (!icom_adapter) { - return -ENOMEM; - } - - list_for_each(tmp, &icom_adapter_head) { - cur_adapter_entry = - list_entry(tmp, struct icom_adapter, - icom_adapter_entry); - if (cur_adapter_entry->index != adapter_count) { - break; - } - adapter_count++; - } - - icom_adapter->index = adapter_count; - list_add_tail(&icom_adapter->icom_adapter_entry, tmp); - - *icom_adapter_ref = icom_adapter; - return 0; -} - -static void icom_free_adapter(struct icom_adapter *icom_adapter) -{ - list_del(&icom_adapter->icom_adapter_entry); - kfree(icom_adapter); -} - -static void icom_remove_adapter(struct icom_adapter *icom_adapter) -{ - struct icom_port *icom_port; - int index; - - for (index = 0; index < icom_adapter->numb_ports; index++) { - icom_port = &icom_adapter->port_info[index]; - - if (icom_port->status == ICOM_PORT_ACTIVE) { - dev_info(&icom_adapter->pci_dev->dev, - "Device removed\n"); - - uart_remove_one_port(&icom_uart_driver, - &icom_port->uart_port); - - /* be sure that DTR and RTS are dropped */ - writeb(0x00, &icom_port->dram->osr); - - /* Wait 0.1 Sec for simple Init to complete */ - msleep(100); - - /* Stop proccessor */ - stop_processor(icom_port); - - free_port_memory(icom_port); - } - } - - free_irq(icom_adapter->pci_dev->irq, (void *) icom_adapter); - iounmap(icom_adapter->base_addr); - pci_release_regions(icom_adapter->pci_dev); - icom_free_adapter(icom_adapter); -} - -static void icom_kref_release(struct kref *kref) -{ - struct icom_adapter *icom_adapter; - - icom_adapter = to_icom_adapter(kref); - icom_remove_adapter(icom_adapter); -} - -static int __devinit icom_probe(struct pci_dev *dev, - const struct pci_device_id *ent) -{ - int index; - unsigned int command_reg; - int retval; - struct icom_adapter *icom_adapter; - struct icom_port *icom_port; - - retval = pci_enable_device(dev); - if (retval) { - dev_err(&dev->dev, "Device enable FAILED\n"); - return retval; - } - - if ( (retval = pci_request_regions(dev, "icom"))) { - dev_err(&dev->dev, "pci_request_regions FAILED\n"); - pci_disable_device(dev); - return retval; - } - - pci_set_master(dev); - - if ( (retval = pci_read_config_dword(dev, PCI_COMMAND, &command_reg))) { - dev_err(&dev->dev, "PCI Config read FAILED\n"); - return retval; - } - - pci_write_config_dword(dev, PCI_COMMAND, - command_reg | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER - | PCI_COMMAND_PARITY | PCI_COMMAND_SERR); - - if (ent->driver_data == ADAPTER_V1) { - pci_write_config_dword(dev, 0x44, 0x8300830A); - } else { - pci_write_config_dword(dev, 0x44, 0x42004200); - pci_write_config_dword(dev, 0x48, 0x42004200); - } - - - retval = icom_alloc_adapter(&icom_adapter); - if (retval) { - dev_err(&dev->dev, "icom_alloc_adapter FAILED\n"); - retval = -EIO; - goto probe_exit0; - } - - icom_adapter->base_addr_pci = pci_resource_start(dev, 0); - icom_adapter->pci_dev = dev; - icom_adapter->version = ent->driver_data; - icom_adapter->subsystem_id = ent->subdevice; - - - retval = icom_init_ports(icom_adapter); - if (retval) { - dev_err(&dev->dev, "Port configuration failed\n"); - goto probe_exit1; - } - - icom_adapter->base_addr = pci_ioremap_bar(dev, 0); - - if (!icom_adapter->base_addr) - goto probe_exit1; - - /* save off irq and request irq line */ - if ( (retval = request_irq(dev->irq, icom_interrupt, - IRQF_DISABLED | IRQF_SHARED, ICOM_DRIVER_NAME, - (void *) icom_adapter))) { - goto probe_exit2; - } - - retval = icom_load_ports(icom_adapter); - - for (index = 0; index < icom_adapter->numb_ports; index++) { - icom_port = &icom_adapter->port_info[index]; - - if (icom_port->status == ICOM_PORT_ACTIVE) { - icom_port->uart_port.irq = icom_port->adapter->pci_dev->irq; - icom_port->uart_port.type = PORT_ICOM; - icom_port->uart_port.iotype = UPIO_MEM; - icom_port->uart_port.membase = - (char *) icom_adapter->base_addr_pci; - icom_port->uart_port.fifosize = 16; - icom_port->uart_port.ops = &icom_ops; - icom_port->uart_port.line = - icom_port->port + icom_adapter->index * 4; - if (uart_add_one_port (&icom_uart_driver, &icom_port->uart_port)) { - icom_port->status = ICOM_PORT_OFF; - dev_err(&dev->dev, "Device add failed\n"); - } else - dev_info(&dev->dev, "Device added\n"); - } - } - - kref_init(&icom_adapter->kref); - return 0; - -probe_exit2: - iounmap(icom_adapter->base_addr); -probe_exit1: - icom_free_adapter(icom_adapter); - -probe_exit0: - pci_release_regions(dev); - pci_disable_device(dev); - - return retval; -} - -static void __devexit icom_remove(struct pci_dev *dev) -{ - struct icom_adapter *icom_adapter; - struct list_head *tmp; - - list_for_each(tmp, &icom_adapter_head) { - icom_adapter = list_entry(tmp, struct icom_adapter, - icom_adapter_entry); - if (icom_adapter->pci_dev == dev) { - kref_put(&icom_adapter->kref, icom_kref_release); - return; - } - } - - dev_err(&dev->dev, "Unable to find device to remove\n"); -} - -static struct pci_driver icom_pci_driver = { - .name = ICOM_DRIVER_NAME, - .id_table = icom_pci_table, - .probe = icom_probe, - .remove = __devexit_p(icom_remove), -}; - -static int __init icom_init(void) -{ - int ret; - - spin_lock_init(&icom_lock); - - ret = uart_register_driver(&icom_uart_driver); - if (ret) - return ret; - - ret = pci_register_driver(&icom_pci_driver); - - if (ret < 0) - uart_unregister_driver(&icom_uart_driver); - - return ret; -} - -static void __exit icom_exit(void) -{ - pci_unregister_driver(&icom_pci_driver); - uart_unregister_driver(&icom_uart_driver); -} - -module_init(icom_init); -module_exit(icom_exit); - -MODULE_AUTHOR("Michael Anderson <mjanders@us.ibm.com>"); -MODULE_DESCRIPTION("IBM iSeries Serial IOA driver"); -MODULE_SUPPORTED_DEVICE - ("IBM iSeries 2745, 2771, 2772, 2742, 2793 and 2805 Communications adapters"); -MODULE_LICENSE("GPL"); -MODULE_FIRMWARE("icom_call_setup.bin"); -MODULE_FIRMWARE("icom_res_dce.bin"); -MODULE_FIRMWARE("icom_asc.bin"); diff --git a/drivers/serial/icom.h b/drivers/serial/icom.h deleted file mode 100644 index c8029e0025c9..000000000000 --- a/drivers/serial/icom.h +++ /dev/null @@ -1,287 +0,0 @@ -/* - * icom.h - * - * Copyright (C) 2001 Michael Anderson, IBM Corporation - * - * Serial device driver include file. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include <linux/serial_core.h> - -#define BAUD_TABLE_LIMIT ((sizeof(icom_acfg_baud)/sizeof(int)) - 1) -static int icom_acfg_baud[] = { - 300, - 600, - 900, - 1200, - 1800, - 2400, - 3600, - 4800, - 7200, - 9600, - 14400, - 19200, - 28800, - 38400, - 57600, - 76800, - 115200, - 153600, - 230400, - 307200, - 460800, -}; - -struct icom_regs { - u32 control; /* Adapter Control Register */ - u32 interrupt; /* Adapter Interrupt Register */ - u32 int_mask; /* Adapter Interrupt Mask Reg */ - u32 int_pri; /* Adapter Interrupt Priority r */ - u32 int_reg_b; /* Adapter non-masked Interrupt */ - u32 resvd01; - u32 resvd02; - u32 resvd03; - u32 control_2; /* Adapter Control Register 2 */ - u32 interrupt_2; /* Adapter Interrupt Register 2 */ - u32 int_mask_2; /* Adapter Interrupt Mask 2 */ - u32 int_pri_2; /* Adapter Interrupt Prior 2 */ - u32 int_reg_2b; /* Adapter non-masked 2 */ -}; - -struct func_dram { - u32 reserved[108]; /* 0-1B0 reserved by personality code */ - u32 RcvStatusAddr; /* 1B0-1B3 Status Address for Next rcv */ - u8 RcvStnAddr; /* 1B4 Receive Station Addr */ - u8 IdleState; /* 1B5 Idle State */ - u8 IdleMonitor; /* 1B6 Idle Monitor */ - u8 FlagFillIdleTimer; /* 1B7 Flag Fill Idle Timer */ - u32 XmitStatusAddr; /* 1B8-1BB Transmit Status Address */ - u8 StartXmitCmd; /* 1BC Start Xmit Command */ - u8 HDLCConfigReg; /* 1BD Reserved */ - u8 CauseCode; /* 1BE Cause code for fatal error */ - u8 xchar; /* 1BF High priority send */ - u32 reserved3; /* 1C0-1C3 Reserved */ - u8 PrevCmdReg; /* 1C4 Reserved */ - u8 CmdReg; /* 1C5 Command Register */ - u8 async_config2; /* 1C6 Async Config Byte 2 */ - u8 async_config3; /* 1C7 Async Config Byte 3 */ - u8 dce_resvd[20]; /* 1C8-1DB DCE Rsvd */ - u8 dce_resvd21; /* 1DC DCE Rsvd (21st byte */ - u8 misc_flags; /* 1DD misc flags */ -#define V2_HARDWARE 0x40 -#define ICOM_HDW_ACTIVE 0x01 - u8 call_length; /* 1DE Phone #/CFI buff ln */ - u8 call_length2; /* 1DF Upper byte (unused) */ - u32 call_addr; /* 1E0-1E3 Phn #/CFI buff addr */ - u16 timer_value; /* 1E4-1E5 general timer value */ - u8 timer_command; /* 1E6 general timer cmd */ - u8 dce_command; /* 1E7 dce command reg */ - u8 dce_cmd_status; /* 1E8 dce command stat */ - u8 x21_r1_ioff; /* 1E9 dce ready counter */ - u8 x21_r0_ioff; /* 1EA dce not ready ctr */ - u8 x21_ralt_ioff; /* 1EB dce CNR counter */ - u8 x21_r1_ion; /* 1EC dce ready I on ctr */ - u8 rsvd_ier; /* 1ED Rsvd for IER (if ne */ - u8 ier; /* 1EE Interrupt Enable */ - u8 isr; /* 1EF Input Signal Reg */ - u8 osr; /* 1F0 Output Signal Reg */ - u8 reset; /* 1F1 Reset/Reload Reg */ - u8 disable; /* 1F2 Disable Reg */ - u8 sync; /* 1F3 Sync Reg */ - u8 error_stat; /* 1F4 Error Status */ - u8 cable_id; /* 1F5 Cable ID */ - u8 cs_length; /* 1F6 CS Load Length */ - u8 mac_length; /* 1F7 Mac Load Length */ - u32 cs_load_addr; /* 1F8-1FB Call Load PCI Addr */ - u32 mac_load_addr; /* 1FC-1FF Mac Load PCI Addr */ -}; - -/* - * adapter defines and structures - */ -#define ICOM_CONTROL_START_A 0x00000008 -#define ICOM_CONTROL_STOP_A 0x00000004 -#define ICOM_CONTROL_START_B 0x00000002 -#define ICOM_CONTROL_STOP_B 0x00000001 -#define ICOM_CONTROL_START_C 0x00000008 -#define ICOM_CONTROL_STOP_C 0x00000004 -#define ICOM_CONTROL_START_D 0x00000002 -#define ICOM_CONTROL_STOP_D 0x00000001 -#define ICOM_IRAM_OFFSET 0x1000 -#define ICOM_IRAM_SIZE 0x0C00 -#define ICOM_DCE_IRAM_OFFSET 0x0A00 -#define ICOM_CABLE_ID_VALID 0x01 -#define ICOM_CABLE_ID_MASK 0xF0 -#define ICOM_DISABLE 0x80 -#define CMD_XMIT_RCV_ENABLE 0xC0 -#define CMD_XMIT_ENABLE 0x40 -#define CMD_RCV_DISABLE 0x00 -#define CMD_RCV_ENABLE 0x80 -#define CMD_RESTART 0x01 -#define CMD_HOLD_XMIT 0x02 -#define CMD_SND_BREAK 0x04 -#define RS232_CABLE 0x06 -#define V24_CABLE 0x0E -#define V35_CABLE 0x0C -#define V36_CABLE 0x02 -#define NO_CABLE 0x00 -#define START_DOWNLOAD 0x80 -#define ICOM_INT_MASK_PRC_A 0x00003FFF -#define ICOM_INT_MASK_PRC_B 0x3FFF0000 -#define ICOM_INT_MASK_PRC_C 0x00003FFF -#define ICOM_INT_MASK_PRC_D 0x3FFF0000 -#define INT_RCV_COMPLETED 0x1000 -#define INT_XMIT_COMPLETED 0x2000 -#define INT_IDLE_DETECT 0x0800 -#define INT_RCV_DISABLED 0x0400 -#define INT_XMIT_DISABLED 0x0200 -#define INT_RCV_XMIT_SHUTDOWN 0x0100 -#define INT_FATAL_ERROR 0x0080 -#define INT_CABLE_PULL 0x0020 -#define INT_SIGNAL_CHANGE 0x0010 -#define HDLC_PPP_PURE_ASYNC 0x02 -#define HDLC_FF_FILL 0x00 -#define HDLC_HDW_FLOW 0x01 -#define START_XMIT 0x80 -#define ICOM_ACFG_DRIVE1 0x20 -#define ICOM_ACFG_NO_PARITY 0x00 -#define ICOM_ACFG_PARITY_ENAB 0x02 -#define ICOM_ACFG_PARITY_ODD 0x01 -#define ICOM_ACFG_8BPC 0x00 -#define ICOM_ACFG_7BPC 0x04 -#define ICOM_ACFG_6BPC 0x08 -#define ICOM_ACFG_5BPC 0x0C -#define ICOM_ACFG_1STOP_BIT 0x00 -#define ICOM_ACFG_2STOP_BIT 0x10 -#define ICOM_DTR 0x80 -#define ICOM_RTS 0x40 -#define ICOM_RI 0x08 -#define ICOM_DSR 0x80 -#define ICOM_DCD 0x20 -#define ICOM_CTS 0x40 - -#define NUM_XBUFFS 1 -#define NUM_RBUFFS 2 -#define RCV_BUFF_SZ 0x0200 -#define XMIT_BUFF_SZ 0x1000 -struct statusArea { - /**********************************************/ - /* Transmit Status Area */ - /**********************************************/ - struct xmit_status_area{ - u32 leNext; /* Next entry in Little Endian on Adapter */ - u32 leNextASD; - u32 leBuffer; /* Buffer for entry in LE for Adapter */ - u16 leLengthASD; - u16 leOffsetASD; - u16 leLength; /* Length of data in segment */ - u16 flags; -#define SA_FLAGS_DONE 0x0080 /* Done with Segment */ -#define SA_FLAGS_CONTINUED 0x8000 /* More Segments */ -#define SA_FLAGS_IDLE 0x4000 /* Mark IDLE after frm */ -#define SA_FLAGS_READY_TO_XMIT 0x0800 -#define SA_FLAGS_STAT_MASK 0x007F - } xmit[NUM_XBUFFS]; - - /**********************************************/ - /* Receive Status Area */ - /**********************************************/ - struct { - u32 leNext; /* Next entry in Little Endian on Adapter */ - u32 leNextASD; - u32 leBuffer; /* Buffer for entry in LE for Adapter */ - u16 WorkingLength; /* size of segment */ - u16 reserv01; - u16 leLength; /* Length of data in segment */ - u16 flags; -#define SA_FL_RCV_DONE 0x0010 /* Data ready */ -#define SA_FLAGS_OVERRUN 0x0040 -#define SA_FLAGS_PARITY_ERROR 0x0080 -#define SA_FLAGS_FRAME_ERROR 0x0001 -#define SA_FLAGS_FRAME_TRUNC 0x0002 -#define SA_FLAGS_BREAK_DET 0x0004 /* set conditionally by device driver, not hardware */ -#define SA_FLAGS_RCV_MASK 0xFFE6 - } rcv[NUM_RBUFFS]; -}; - -struct icom_adapter; - - -#define ICOM_MAJOR 243 -#define ICOM_MINOR_START 0 - -struct icom_port { - struct uart_port uart_port; - u8 imbed_modem; -#define ICOM_UNKNOWN 1 -#define ICOM_RVX 2 -#define ICOM_IMBED_MODEM 3 - unsigned char cable_id; - unsigned char read_status_mask; - unsigned char ignore_status_mask; - void __iomem * int_reg; - struct icom_regs __iomem *global_reg; - struct func_dram __iomem *dram; - int port; - struct statusArea *statStg; - dma_addr_t statStg_pci; - u32 *xmitRestart; - dma_addr_t xmitRestart_pci; - unsigned char *xmit_buf; - dma_addr_t xmit_buf_pci; - unsigned char *recv_buf; - dma_addr_t recv_buf_pci; - int next_rcv; - int put_length; - int status; -#define ICOM_PORT_ACTIVE 1 /* Port exists. */ -#define ICOM_PORT_OFF 0 /* Port does not exist. */ - int load_in_progress; - struct icom_adapter *adapter; -}; - -struct icom_adapter { - void __iomem * base_addr; - unsigned long base_addr_pci; - struct pci_dev *pci_dev; - struct icom_port port_info[4]; - int index; - int version; -#define ADAPTER_V1 0x0001 -#define ADAPTER_V2 0x0002 - u32 subsystem_id; -#define FOUR_PORT_MODEL 0x0252 -#define V2_TWO_PORTS_RVX 0x021A -#define V2_ONE_PORT_RVX_ONE_PORT_IMBED_MDM 0x0251 - int numb_ports; - struct list_head icom_adapter_entry; - struct kref kref; -}; - -/* prototype */ -extern void iCom_sercons_init(void); - -struct lookup_proc_table { - u32 __iomem *global_control_reg; - unsigned long processor_id; -}; - -struct lookup_int_table { - u32 __iomem *global_int_mask; - unsigned long processor_id; -}; diff --git a/drivers/serial/ifx6x60.c b/drivers/serial/ifx6x60.c deleted file mode 100644 index ab93763862d5..000000000000 --- a/drivers/serial/ifx6x60.c +++ /dev/null @@ -1,1406 +0,0 @@ -/**************************************************************************** - * - * Driver for the IFX 6x60 spi modem. - * - * Copyright (C) 2008 Option International - * Copyright (C) 2008 Filip Aben <f.aben@option.com> - * Denis Joseph Barrow <d.barow@option.com> - * Jan Dumon <j.dumon@option.com> - * - * Copyright (C) 2009, 2010 Intel Corp - * Russ Gorby <richardx.r.gorby@intel.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, - * USA - * - * Driver modified by Intel from Option gtm501l_spi.c - * - * Notes - * o The driver currently assumes a single device only. If you need to - * change this then look for saved_ifx_dev and add a device lookup - * o The driver is intended to be big-endian safe but has never been - * tested that way (no suitable hardware). There are a couple of FIXME - * notes by areas that may need addressing - * o Some of the GPIO naming/setup assumptions may need revisiting if - * you need to use this driver for another platform. - * - *****************************************************************************/ -#include <linux/module.h> -#include <linux/termios.h> -#include <linux/tty.h> -#include <linux/device.h> -#include <linux/spi/spi.h> -#include <linux/tty.h> -#include <linux/kfifo.h> -#include <linux/tty_flip.h> -#include <linux/timer.h> -#include <linux/serial.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/rfkill.h> -#include <linux/fs.h> -#include <linux/ip.h> -#include <linux/dmapool.h> -#include <linux/gpio.h> -#include <linux/sched.h> -#include <linux/time.h> -#include <linux/wait.h> -#include <linux/tty.h> -#include <linux/pm.h> -#include <linux/pm_runtime.h> -#include <linux/spi/ifx_modem.h> -#include <linux/delay.h> - -#include "ifx6x60.h" - -#define IFX_SPI_MORE_MASK 0x10 -#define IFX_SPI_MORE_BIT 12 /* bit position in u16 */ -#define IFX_SPI_CTS_BIT 13 /* bit position in u16 */ -#define IFX_SPI_TTY_ID 0 -#define IFX_SPI_TIMEOUT_SEC 2 -#define IFX_SPI_HEADER_0 (-1) -#define IFX_SPI_HEADER_F (-2) - -/* forward reference */ -static void ifx_spi_handle_srdy(struct ifx_spi_device *ifx_dev); - -/* local variables */ -static int spi_b16 = 1; /* 8 or 16 bit word length */ -static struct tty_driver *tty_drv; -static struct ifx_spi_device *saved_ifx_dev; -static struct lock_class_key ifx_spi_key; - -/* GPIO/GPE settings */ - -/** - * mrdy_set_high - set MRDY GPIO - * @ifx: device we are controlling - * - */ -static inline void mrdy_set_high(struct ifx_spi_device *ifx) -{ - gpio_set_value(ifx->gpio.mrdy, 1); -} - -/** - * mrdy_set_low - clear MRDY GPIO - * @ifx: device we are controlling - * - */ -static inline void mrdy_set_low(struct ifx_spi_device *ifx) -{ - gpio_set_value(ifx->gpio.mrdy, 0); -} - -/** - * ifx_spi_power_state_set - * @ifx_dev: our SPI device - * @val: bits to set - * - * Set bit in power status and signal power system if status becomes non-0 - */ -static void -ifx_spi_power_state_set(struct ifx_spi_device *ifx_dev, unsigned char val) -{ - unsigned long flags; - - spin_lock_irqsave(&ifx_dev->power_lock, flags); - - /* - * if power status is already non-0, just update, else - * tell power system - */ - if (!ifx_dev->power_status) - pm_runtime_get(&ifx_dev->spi_dev->dev); - ifx_dev->power_status |= val; - - spin_unlock_irqrestore(&ifx_dev->power_lock, flags); -} - -/** - * ifx_spi_power_state_clear - clear power bit - * @ifx_dev: our SPI device - * @val: bits to clear - * - * clear bit in power status and signal power system if status becomes 0 - */ -static void -ifx_spi_power_state_clear(struct ifx_spi_device *ifx_dev, unsigned char val) -{ - unsigned long flags; - - spin_lock_irqsave(&ifx_dev->power_lock, flags); - - if (ifx_dev->power_status) { - ifx_dev->power_status &= ~val; - if (!ifx_dev->power_status) - pm_runtime_put(&ifx_dev->spi_dev->dev); - } - - spin_unlock_irqrestore(&ifx_dev->power_lock, flags); -} - -/** - * swap_buf - * @buf: our buffer - * @len : number of bytes (not words) in the buffer - * @end: end of buffer - * - * Swap the contents of a buffer into big endian format - */ -static inline void swap_buf(u16 *buf, int len, void *end) -{ - int n; - - len = ((len + 1) >> 1); - if ((void *)&buf[len] > end) { - pr_err("swap_buf: swap exceeds boundary (%p > %p)!", - &buf[len], end); - return; - } - for (n = 0; n < len; n++) { - *buf = cpu_to_be16(*buf); - buf++; - } -} - -/** - * mrdy_assert - assert MRDY line - * @ifx_dev: our SPI device - * - * Assert mrdy and set timer to wait for SRDY interrupt, if SRDY is low - * now. - * - * FIXME: Can SRDY even go high as we are running this code ? - */ -static void mrdy_assert(struct ifx_spi_device *ifx_dev) -{ - int val = gpio_get_value(ifx_dev->gpio.srdy); - if (!val) { - if (!test_and_set_bit(IFX_SPI_STATE_TIMER_PENDING, - &ifx_dev->flags)) { - ifx_dev->spi_timer.expires = - jiffies + IFX_SPI_TIMEOUT_SEC*HZ; - add_timer(&ifx_dev->spi_timer); - - } - } - ifx_spi_power_state_set(ifx_dev, IFX_SPI_POWER_DATA_PENDING); - mrdy_set_high(ifx_dev); -} - -/** - * ifx_spi_hangup - hang up an IFX device - * @ifx_dev: our SPI device - * - * Hang up the tty attached to the IFX device if one is currently - * open. If not take no action - */ -static void ifx_spi_ttyhangup(struct ifx_spi_device *ifx_dev) -{ - struct tty_port *pport = &ifx_dev->tty_port; - struct tty_struct *tty = tty_port_tty_get(pport); - if (tty) { - tty_hangup(tty); - tty_kref_put(tty); - } -} - -/** - * ifx_spi_timeout - SPI timeout - * @arg: our SPI device - * - * The SPI has timed out: hang up the tty. Users will then see a hangup - * and error events. - */ -static void ifx_spi_timeout(unsigned long arg) -{ - struct ifx_spi_device *ifx_dev = (struct ifx_spi_device *)arg; - - dev_warn(&ifx_dev->spi_dev->dev, "*** SPI Timeout ***"); - ifx_spi_ttyhangup(ifx_dev); - mrdy_set_low(ifx_dev); - clear_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags); -} - -/* char/tty operations */ - -/** - * ifx_spi_tiocmget - get modem lines - * @tty: our tty device - * @filp: file handle issuing the request - * - * Map the signal state into Linux modem flags and report the value - * in Linux terms - */ -static int ifx_spi_tiocmget(struct tty_struct *tty, struct file *filp) -{ - unsigned int value; - struct ifx_spi_device *ifx_dev = tty->driver_data; - - value = - (test_bit(IFX_SPI_RTS, &ifx_dev->signal_state) ? TIOCM_RTS : 0) | - (test_bit(IFX_SPI_DTR, &ifx_dev->signal_state) ? TIOCM_DTR : 0) | - (test_bit(IFX_SPI_CTS, &ifx_dev->signal_state) ? TIOCM_CTS : 0) | - (test_bit(IFX_SPI_DSR, &ifx_dev->signal_state) ? TIOCM_DSR : 0) | - (test_bit(IFX_SPI_DCD, &ifx_dev->signal_state) ? TIOCM_CAR : 0) | - (test_bit(IFX_SPI_RI, &ifx_dev->signal_state) ? TIOCM_RNG : 0); - return value; -} - -/** - * ifx_spi_tiocmset - set modem bits - * @tty: the tty structure - * @filp: file handle issuing the request - * @set: bits to set - * @clear: bits to clear - * - * The IFX6x60 only supports DTR and RTS. Set them accordingly - * and flag that an update to the modem is needed. - * - * FIXME: do we need to kick the tranfers when we do this ? - */ -static int ifx_spi_tiocmset(struct tty_struct *tty, struct file *filp, - unsigned int set, unsigned int clear) -{ - struct ifx_spi_device *ifx_dev = tty->driver_data; - - if (set & TIOCM_RTS) - set_bit(IFX_SPI_RTS, &ifx_dev->signal_state); - if (set & TIOCM_DTR) - set_bit(IFX_SPI_DTR, &ifx_dev->signal_state); - if (clear & TIOCM_RTS) - clear_bit(IFX_SPI_RTS, &ifx_dev->signal_state); - if (clear & TIOCM_DTR) - clear_bit(IFX_SPI_DTR, &ifx_dev->signal_state); - - set_bit(IFX_SPI_UPDATE, &ifx_dev->signal_state); - return 0; -} - -/** - * ifx_spi_open - called on tty open - * @tty: our tty device - * @filp: file handle being associated with the tty - * - * Open the tty interface. We let the tty_port layer do all the work - * for us. - * - * FIXME: Remove single device assumption and saved_ifx_dev - */ -static int ifx_spi_open(struct tty_struct *tty, struct file *filp) -{ - return tty_port_open(&saved_ifx_dev->tty_port, tty, filp); -} - -/** - * ifx_spi_close - called when our tty closes - * @tty: the tty being closed - * @filp: the file handle being closed - * - * Perform the close of the tty. We use the tty_port layer to do all - * our hard work. - */ -static void ifx_spi_close(struct tty_struct *tty, struct file *filp) -{ - struct ifx_spi_device *ifx_dev = tty->driver_data; - tty_port_close(&ifx_dev->tty_port, tty, filp); - /* FIXME: should we do an ifx_spi_reset here ? */ -} - -/** - * ifx_decode_spi_header - decode received header - * @buffer: the received data - * @length: decoded length - * @more: decoded more flag - * @received_cts: status of cts we received - * - * Note how received_cts is handled -- if header is all F it is left - * the same as it was, if header is all 0 it is set to 0 otherwise it is - * taken from the incoming header. - * - * FIXME: endianness - */ -static int ifx_spi_decode_spi_header(unsigned char *buffer, int *length, - unsigned char *more, unsigned char *received_cts) -{ - u16 h1; - u16 h2; - u16 *in_buffer = (u16 *)buffer; - - h1 = *in_buffer; - h2 = *(in_buffer+1); - - if (h1 == 0 && h2 == 0) { - *received_cts = 0; - return IFX_SPI_HEADER_0; - } else if (h1 == 0xffff && h2 == 0xffff) { - /* spi_slave_cts remains as it was */ - return IFX_SPI_HEADER_F; - } - - *length = h1 & 0xfff; /* upper bits of byte are flags */ - *more = (buffer[1] >> IFX_SPI_MORE_BIT) & 1; - *received_cts = (buffer[3] >> IFX_SPI_CTS_BIT) & 1; - return 0; -} - -/** - * ifx_setup_spi_header - set header fields - * @txbuffer: pointer to start of SPI buffer - * @tx_count: bytes - * @more: indicate if more to follow - * - * Format up an SPI header for a transfer - * - * FIXME: endianness? - */ -static void ifx_spi_setup_spi_header(unsigned char *txbuffer, int tx_count, - unsigned char more) -{ - *(u16 *)(txbuffer) = tx_count; - *(u16 *)(txbuffer+2) = IFX_SPI_PAYLOAD_SIZE; - txbuffer[1] |= (more << IFX_SPI_MORE_BIT) & IFX_SPI_MORE_MASK; -} - -/** - * ifx_spi_wakeup_serial - SPI space made - * @port_data: our SPI device - * - * We have emptied the FIFO enough that we want to get more data - * queued into it. Poke the line discipline via tty_wakeup so that - * it will feed us more bits - */ -static void ifx_spi_wakeup_serial(struct ifx_spi_device *ifx_dev) -{ - struct tty_struct *tty; - - tty = tty_port_tty_get(&ifx_dev->tty_port); - if (!tty) - return; - tty_wakeup(tty); - tty_kref_put(tty); -} - -/** - * ifx_spi_prepare_tx_buffer - prepare transmit frame - * @ifx_dev: our SPI device - * - * The transmit buffr needs a header and various other bits of - * information followed by as much data as we can pull from the FIFO - * and transfer. This function formats up a suitable buffer in the - * ifx_dev->tx_buffer - * - * FIXME: performance - should we wake the tty when the queue is half - * empty ? - */ -static int ifx_spi_prepare_tx_buffer(struct ifx_spi_device *ifx_dev) -{ - int temp_count; - int queue_length; - int tx_count; - unsigned char *tx_buffer; - - tx_buffer = ifx_dev->tx_buffer; - memset(tx_buffer, 0, IFX_SPI_TRANSFER_SIZE); - - /* make room for required SPI header */ - tx_buffer += IFX_SPI_HEADER_OVERHEAD; - tx_count = IFX_SPI_HEADER_OVERHEAD; - - /* clear to signal no more data if this turns out to be the - * last buffer sent in a sequence */ - ifx_dev->spi_more = 0; - - /* if modem cts is set, just send empty buffer */ - if (!ifx_dev->spi_slave_cts) { - /* see if there's tx data */ - queue_length = kfifo_len(&ifx_dev->tx_fifo); - if (queue_length != 0) { - /* data to mux -- see if there's room for it */ - temp_count = min(queue_length, IFX_SPI_PAYLOAD_SIZE); - temp_count = kfifo_out_locked(&ifx_dev->tx_fifo, - tx_buffer, temp_count, - &ifx_dev->fifo_lock); - - /* update buffer pointer and data count in message */ - tx_buffer += temp_count; - tx_count += temp_count; - if (temp_count == queue_length) - /* poke port to get more data */ - ifx_spi_wakeup_serial(ifx_dev); - else /* more data in port, use next SPI message */ - ifx_dev->spi_more = 1; - } - } - /* have data and info for header -- set up SPI header in buffer */ - /* spi header needs payload size, not entire buffer size */ - ifx_spi_setup_spi_header(ifx_dev->tx_buffer, - tx_count-IFX_SPI_HEADER_OVERHEAD, - ifx_dev->spi_more); - /* swap actual data in the buffer */ - swap_buf((u16 *)(ifx_dev->tx_buffer), tx_count, - &ifx_dev->tx_buffer[IFX_SPI_TRANSFER_SIZE]); - return tx_count; -} - -/** - * ifx_spi_write - line discipline write - * @tty: our tty device - * @buf: pointer to buffer to write (kernel space) - * @count: size of buffer - * - * Write the characters we have been given into the FIFO. If the device - * is not active then activate it, when the SRDY line is asserted back - * this will commence I/O - */ -static int ifx_spi_write(struct tty_struct *tty, const unsigned char *buf, - int count) -{ - struct ifx_spi_device *ifx_dev = tty->driver_data; - unsigned char *tmp_buf = (unsigned char *)buf; - int tx_count = kfifo_in_locked(&ifx_dev->tx_fifo, tmp_buf, count, - &ifx_dev->fifo_lock); - mrdy_assert(ifx_dev); - return tx_count; -} - -/** - * ifx_spi_chars_in_buffer - line discipline helper - * @tty: our tty device - * - * Report how much data we can accept before we drop bytes. As we use - * a simple FIFO this is nice and easy. - */ -static int ifx_spi_write_room(struct tty_struct *tty) -{ - struct ifx_spi_device *ifx_dev = tty->driver_data; - return IFX_SPI_FIFO_SIZE - kfifo_len(&ifx_dev->tx_fifo); -} - -/** - * ifx_spi_chars_in_buffer - line discipline helper - * @tty: our tty device - * - * Report how many characters we have buffered. In our case this is the - * number of bytes sitting in our transmit FIFO. - */ -static int ifx_spi_chars_in_buffer(struct tty_struct *tty) -{ - struct ifx_spi_device *ifx_dev = tty->driver_data; - return kfifo_len(&ifx_dev->tx_fifo); -} - -/** - * ifx_port_hangup - * @port: our tty port - * - * tty port hang up. Called when tty_hangup processing is invoked either - * by loss of carrier, or by software (eg vhangup). Serialized against - * activate/shutdown by the tty layer. - */ -static void ifx_spi_hangup(struct tty_struct *tty) -{ - struct ifx_spi_device *ifx_dev = tty->driver_data; - tty_port_hangup(&ifx_dev->tty_port); -} - -/** - * ifx_port_activate - * @port: our tty port - * - * tty port activate method - called for first open. Serialized - * with hangup and shutdown by the tty layer. - */ -static int ifx_port_activate(struct tty_port *port, struct tty_struct *tty) -{ - struct ifx_spi_device *ifx_dev = - container_of(port, struct ifx_spi_device, tty_port); - - /* clear any old data; can't do this in 'close' */ - kfifo_reset(&ifx_dev->tx_fifo); - - /* put port data into this tty */ - tty->driver_data = ifx_dev; - - /* allows flip string push from int context */ - tty->low_latency = 1; - - return 0; -} - -/** - * ifx_port_shutdown - * @port: our tty port - * - * tty port shutdown method - called for last port close. Serialized - * with hangup and activate by the tty layer. - */ -static void ifx_port_shutdown(struct tty_port *port) -{ - struct ifx_spi_device *ifx_dev = - container_of(port, struct ifx_spi_device, tty_port); - - mrdy_set_low(ifx_dev); - clear_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags); - tasklet_kill(&ifx_dev->io_work_tasklet); -} - -static const struct tty_port_operations ifx_tty_port_ops = { - .activate = ifx_port_activate, - .shutdown = ifx_port_shutdown, -}; - -static const struct tty_operations ifx_spi_serial_ops = { - .open = ifx_spi_open, - .close = ifx_spi_close, - .write = ifx_spi_write, - .hangup = ifx_spi_hangup, - .write_room = ifx_spi_write_room, - .chars_in_buffer = ifx_spi_chars_in_buffer, - .tiocmget = ifx_spi_tiocmget, - .tiocmset = ifx_spi_tiocmset, -}; - -/** - * ifx_spi_insert_fip_string - queue received data - * @ifx_ser: our SPI device - * @chars: buffer we have received - * @size: number of chars reeived - * - * Queue bytes to the tty assuming the tty side is currently open. If - * not the discard the data. - */ -static void ifx_spi_insert_flip_string(struct ifx_spi_device *ifx_dev, - unsigned char *chars, size_t size) -{ - struct tty_struct *tty = tty_port_tty_get(&ifx_dev->tty_port); - if (!tty) - return; - tty_insert_flip_string(tty, chars, size); - tty_flip_buffer_push(tty); - tty_kref_put(tty); -} - -/** - * ifx_spi_complete - SPI transfer completed - * @ctx: our SPI device - * - * An SPI transfer has completed. Process any received data and kick off - * any further transmits we can commence. - */ -static void ifx_spi_complete(void *ctx) -{ - struct ifx_spi_device *ifx_dev = ctx; - struct tty_struct *tty; - struct tty_ldisc *ldisc = NULL; - int length; - int actual_length; - unsigned char more; - unsigned char cts; - int local_write_pending = 0; - int queue_length; - int srdy; - int decode_result; - - mrdy_set_low(ifx_dev); - - if (!ifx_dev->spi_msg.status) { - /* check header validity, get comm flags */ - swap_buf((u16 *)ifx_dev->rx_buffer, IFX_SPI_HEADER_OVERHEAD, - &ifx_dev->rx_buffer[IFX_SPI_HEADER_OVERHEAD]); - decode_result = ifx_spi_decode_spi_header(ifx_dev->rx_buffer, - &length, &more, &cts); - if (decode_result == IFX_SPI_HEADER_0) { - dev_dbg(&ifx_dev->spi_dev->dev, - "ignore input: invalid header 0"); - ifx_dev->spi_slave_cts = 0; - goto complete_exit; - } else if (decode_result == IFX_SPI_HEADER_F) { - dev_dbg(&ifx_dev->spi_dev->dev, - "ignore input: invalid header F"); - goto complete_exit; - } - - ifx_dev->spi_slave_cts = cts; - - actual_length = min((unsigned int)length, - ifx_dev->spi_msg.actual_length); - swap_buf((u16 *)(ifx_dev->rx_buffer + IFX_SPI_HEADER_OVERHEAD), - actual_length, - &ifx_dev->rx_buffer[IFX_SPI_TRANSFER_SIZE]); - ifx_spi_insert_flip_string( - ifx_dev, - ifx_dev->rx_buffer + IFX_SPI_HEADER_OVERHEAD, - (size_t)actual_length); - } else { - dev_dbg(&ifx_dev->spi_dev->dev, "SPI transfer error %d", - ifx_dev->spi_msg.status); - } - -complete_exit: - if (ifx_dev->write_pending) { - ifx_dev->write_pending = 0; - local_write_pending = 1; - } - - clear_bit(IFX_SPI_STATE_IO_IN_PROGRESS, &(ifx_dev->flags)); - - queue_length = kfifo_len(&ifx_dev->tx_fifo); - srdy = gpio_get_value(ifx_dev->gpio.srdy); - if (!srdy) - ifx_spi_power_state_clear(ifx_dev, IFX_SPI_POWER_SRDY); - - /* schedule output if there is more to do */ - if (test_and_clear_bit(IFX_SPI_STATE_IO_READY, &ifx_dev->flags)) - tasklet_schedule(&ifx_dev->io_work_tasklet); - else { - if (more || ifx_dev->spi_more || queue_length > 0 || - local_write_pending) { - if (ifx_dev->spi_slave_cts) { - if (more) - mrdy_assert(ifx_dev); - } else - mrdy_assert(ifx_dev); - } else { - /* - * poke line discipline driver if any for more data - * may or may not get more data to write - * for now, say not busy - */ - ifx_spi_power_state_clear(ifx_dev, - IFX_SPI_POWER_DATA_PENDING); - tty = tty_port_tty_get(&ifx_dev->tty_port); - if (tty) { - ldisc = tty_ldisc_ref(tty); - if (ldisc) { - ldisc->ops->write_wakeup(tty); - tty_ldisc_deref(ldisc); - } - tty_kref_put(tty); - } - } - } -} - -/** - * ifx_spio_io - I/O tasklet - * @data: our SPI device - * - * Queue data for transmission if possible and then kick off the - * transfer. - */ -static void ifx_spi_io(unsigned long data) -{ - int retval; - struct ifx_spi_device *ifx_dev = (struct ifx_spi_device *) data; - - if (!test_and_set_bit(IFX_SPI_STATE_IO_IN_PROGRESS, &ifx_dev->flags)) { - if (ifx_dev->gpio.unack_srdy_int_nb > 0) - ifx_dev->gpio.unack_srdy_int_nb--; - - ifx_spi_prepare_tx_buffer(ifx_dev); - - spi_message_init(&ifx_dev->spi_msg); - INIT_LIST_HEAD(&ifx_dev->spi_msg.queue); - - ifx_dev->spi_msg.context = ifx_dev; - ifx_dev->spi_msg.complete = ifx_spi_complete; - - /* set up our spi transfer */ - /* note len is BYTES, not transfers */ - ifx_dev->spi_xfer.len = IFX_SPI_TRANSFER_SIZE; - ifx_dev->spi_xfer.cs_change = 0; - ifx_dev->spi_xfer.speed_hz = 12500000; - /* ifx_dev->spi_xfer.speed_hz = 390625; */ - ifx_dev->spi_xfer.bits_per_word = spi_b16 ? 16 : 8; - - ifx_dev->spi_xfer.tx_buf = ifx_dev->tx_buffer; - ifx_dev->spi_xfer.rx_buf = ifx_dev->rx_buffer; - - /* - * setup dma pointers - */ - if (ifx_dev->is_6160) { - ifx_dev->spi_msg.is_dma_mapped = 1; - ifx_dev->tx_dma = ifx_dev->tx_bus; - ifx_dev->rx_dma = ifx_dev->rx_bus; - ifx_dev->spi_xfer.tx_dma = ifx_dev->tx_dma; - ifx_dev->spi_xfer.rx_dma = ifx_dev->rx_dma; - } else { - ifx_dev->spi_msg.is_dma_mapped = 0; - ifx_dev->tx_dma = (dma_addr_t)0; - ifx_dev->rx_dma = (dma_addr_t)0; - ifx_dev->spi_xfer.tx_dma = (dma_addr_t)0; - ifx_dev->spi_xfer.rx_dma = (dma_addr_t)0; - } - - spi_message_add_tail(&ifx_dev->spi_xfer, &ifx_dev->spi_msg); - - /* Assert MRDY. This may have already been done by the write - * routine. - */ - mrdy_assert(ifx_dev); - - retval = spi_async(ifx_dev->spi_dev, &ifx_dev->spi_msg); - if (retval) { - clear_bit(IFX_SPI_STATE_IO_IN_PROGRESS, - &ifx_dev->flags); - tasklet_schedule(&ifx_dev->io_work_tasklet); - return; - } - } else - ifx_dev->write_pending = 1; -} - -/** - * ifx_spi_free_port - free up the tty side - * @ifx_dev: IFX device going away - * - * Unregister and free up a port when the device goes away - */ -static void ifx_spi_free_port(struct ifx_spi_device *ifx_dev) -{ - if (ifx_dev->tty_dev) - tty_unregister_device(tty_drv, ifx_dev->minor); - kfifo_free(&ifx_dev->tx_fifo); -} - -/** - * ifx_spi_create_port - create a new port - * @ifx_dev: our spi device - * - * Allocate and initialise the tty port that goes with this interface - * and add it to the tty layer so that it can be opened. - */ -static int ifx_spi_create_port(struct ifx_spi_device *ifx_dev) -{ - int ret = 0; - struct tty_port *pport = &ifx_dev->tty_port; - - spin_lock_init(&ifx_dev->fifo_lock); - lockdep_set_class_and_subclass(&ifx_dev->fifo_lock, - &ifx_spi_key, 0); - - if (kfifo_alloc(&ifx_dev->tx_fifo, IFX_SPI_FIFO_SIZE, GFP_KERNEL)) { - ret = -ENOMEM; - goto error_ret; - } - - pport->ops = &ifx_tty_port_ops; - tty_port_init(pport); - ifx_dev->minor = IFX_SPI_TTY_ID; - ifx_dev->tty_dev = tty_register_device(tty_drv, ifx_dev->minor, - &ifx_dev->spi_dev->dev); - if (IS_ERR(ifx_dev->tty_dev)) { - dev_dbg(&ifx_dev->spi_dev->dev, - "%s: registering tty device failed", __func__); - ret = PTR_ERR(ifx_dev->tty_dev); - goto error_ret; - } - return 0; - -error_ret: - ifx_spi_free_port(ifx_dev); - return ret; -} - -/** - * ifx_spi_handle_srdy - handle SRDY - * @ifx_dev: device asserting SRDY - * - * Check our device state and see what we need to kick off when SRDY - * is asserted. This usually means killing the timer and firing off the - * I/O processing. - */ -static void ifx_spi_handle_srdy(struct ifx_spi_device *ifx_dev) -{ - if (test_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags)) { - del_timer_sync(&ifx_dev->spi_timer); - clear_bit(IFX_SPI_STATE_TIMER_PENDING, &ifx_dev->flags); - } - - ifx_spi_power_state_set(ifx_dev, IFX_SPI_POWER_SRDY); - - if (!test_bit(IFX_SPI_STATE_IO_IN_PROGRESS, &ifx_dev->flags)) - tasklet_schedule(&ifx_dev->io_work_tasklet); - else - set_bit(IFX_SPI_STATE_IO_READY, &ifx_dev->flags); -} - -/** - * ifx_spi_srdy_interrupt - SRDY asserted - * @irq: our IRQ number - * @dev: our ifx device - * - * The modem asserted SRDY. Handle the srdy event - */ -static irqreturn_t ifx_spi_srdy_interrupt(int irq, void *dev) -{ - struct ifx_spi_device *ifx_dev = dev; - ifx_dev->gpio.unack_srdy_int_nb++; - ifx_spi_handle_srdy(ifx_dev); - return IRQ_HANDLED; -} - -/** - * ifx_spi_reset_interrupt - Modem has changed reset state - * @irq: interrupt number - * @dev: our device pointer - * - * The modem has either entered or left reset state. Check the GPIO - * line to see which. - * - * FIXME: review locking on MR_INPROGRESS versus - * parallel unsolicited reset/solicited reset - */ -static irqreturn_t ifx_spi_reset_interrupt(int irq, void *dev) -{ - struct ifx_spi_device *ifx_dev = dev; - int val = gpio_get_value(ifx_dev->gpio.reset_out); - int solreset = test_bit(MR_START, &ifx_dev->mdm_reset_state); - - if (val == 0) { - /* entered reset */ - set_bit(MR_INPROGRESS, &ifx_dev->mdm_reset_state); - if (!solreset) { - /* unsolicited reset */ - ifx_spi_ttyhangup(ifx_dev); - } - } else { - /* exited reset */ - clear_bit(MR_INPROGRESS, &ifx_dev->mdm_reset_state); - if (solreset) { - set_bit(MR_COMPLETE, &ifx_dev->mdm_reset_state); - wake_up(&ifx_dev->mdm_reset_wait); - } - } - return IRQ_HANDLED; -} - -/** - * ifx_spi_free_device - free device - * @ifx_dev: device to free - * - * Free the IFX device - */ -static void ifx_spi_free_device(struct ifx_spi_device *ifx_dev) -{ - ifx_spi_free_port(ifx_dev); - dma_free_coherent(&ifx_dev->spi_dev->dev, - IFX_SPI_TRANSFER_SIZE, - ifx_dev->tx_buffer, - ifx_dev->tx_bus); - dma_free_coherent(&ifx_dev->spi_dev->dev, - IFX_SPI_TRANSFER_SIZE, - ifx_dev->rx_buffer, - ifx_dev->rx_bus); -} - -/** - * ifx_spi_reset - reset modem - * @ifx_dev: modem to reset - * - * Perform a reset on the modem - */ -static int ifx_spi_reset(struct ifx_spi_device *ifx_dev) -{ - int ret; - /* - * set up modem power, reset - * - * delays are required on some platforms for the modem - * to reset properly - */ - set_bit(MR_START, &ifx_dev->mdm_reset_state); - gpio_set_value(ifx_dev->gpio.po, 0); - gpio_set_value(ifx_dev->gpio.reset, 0); - msleep(25); - gpio_set_value(ifx_dev->gpio.reset, 1); - msleep(1); - gpio_set_value(ifx_dev->gpio.po, 1); - msleep(1); - gpio_set_value(ifx_dev->gpio.po, 0); - ret = wait_event_timeout(ifx_dev->mdm_reset_wait, - test_bit(MR_COMPLETE, - &ifx_dev->mdm_reset_state), - IFX_RESET_TIMEOUT); - if (!ret) - dev_warn(&ifx_dev->spi_dev->dev, "Modem reset timeout: (state:%lx)", - ifx_dev->mdm_reset_state); - - ifx_dev->mdm_reset_state = 0; - return ret; -} - -/** - * ifx_spi_spi_probe - probe callback - * @spi: our possible matching SPI device - * - * Probe for a 6x60 modem on SPI bus. Perform any needed device and - * GPIO setup. - * - * FIXME: - * - Support for multiple devices - * - Split out MID specific GPIO handling eventually - */ - -static int ifx_spi_spi_probe(struct spi_device *spi) -{ - int ret; - int srdy; - struct ifx_modem_platform_data *pl_data = NULL; - struct ifx_spi_device *ifx_dev; - - if (saved_ifx_dev) { - dev_dbg(&spi->dev, "ignoring subsequent detection"); - return -ENODEV; - } - - /* initialize structure to hold our device variables */ - ifx_dev = kzalloc(sizeof(struct ifx_spi_device), GFP_KERNEL); - if (!ifx_dev) { - dev_err(&spi->dev, "spi device allocation failed"); - return -ENOMEM; - } - saved_ifx_dev = ifx_dev; - ifx_dev->spi_dev = spi; - clear_bit(IFX_SPI_STATE_IO_IN_PROGRESS, &ifx_dev->flags); - spin_lock_init(&ifx_dev->write_lock); - spin_lock_init(&ifx_dev->power_lock); - ifx_dev->power_status = 0; - init_timer(&ifx_dev->spi_timer); - ifx_dev->spi_timer.function = ifx_spi_timeout; - ifx_dev->spi_timer.data = (unsigned long)ifx_dev; - ifx_dev->is_6160 = pl_data->is_6160; - - /* ensure SPI protocol flags are initialized to enable transfer */ - ifx_dev->spi_more = 0; - ifx_dev->spi_slave_cts = 0; - - /*initialize transfer and dma buffers */ - ifx_dev->tx_buffer = dma_alloc_coherent(&ifx_dev->spi_dev->dev, - IFX_SPI_TRANSFER_SIZE, - &ifx_dev->tx_bus, - GFP_KERNEL); - if (!ifx_dev->tx_buffer) { - dev_err(&spi->dev, "DMA-TX buffer allocation failed"); - ret = -ENOMEM; - goto error_ret; - } - ifx_dev->rx_buffer = dma_alloc_coherent(&ifx_dev->spi_dev->dev, - IFX_SPI_TRANSFER_SIZE, - &ifx_dev->rx_bus, - GFP_KERNEL); - if (!ifx_dev->rx_buffer) { - dev_err(&spi->dev, "DMA-RX buffer allocation failed"); - ret = -ENOMEM; - goto error_ret; - } - - /* initialize waitq for modem reset */ - init_waitqueue_head(&ifx_dev->mdm_reset_wait); - - spi_set_drvdata(spi, ifx_dev); - tasklet_init(&ifx_dev->io_work_tasklet, ifx_spi_io, - (unsigned long)ifx_dev); - - set_bit(IFX_SPI_STATE_PRESENT, &ifx_dev->flags); - - /* create our tty port */ - ret = ifx_spi_create_port(ifx_dev); - if (ret != 0) { - dev_err(&spi->dev, "create default tty port failed"); - goto error_ret; - } - - pl_data = (struct ifx_modem_platform_data *)spi->dev.platform_data; - if (pl_data) { - ifx_dev->gpio.reset = pl_data->rst_pmu; - ifx_dev->gpio.po = pl_data->pwr_on; - ifx_dev->gpio.mrdy = pl_data->mrdy; - ifx_dev->gpio.srdy = pl_data->srdy; - ifx_dev->gpio.reset_out = pl_data->rst_out; - } else { - dev_err(&spi->dev, "missing platform data!"); - ret = -ENODEV; - goto error_ret; - } - - dev_info(&spi->dev, "gpios %d, %d, %d, %d, %d", - ifx_dev->gpio.reset, ifx_dev->gpio.po, ifx_dev->gpio.mrdy, - ifx_dev->gpio.srdy, ifx_dev->gpio.reset_out); - - /* Configure gpios */ - ret = gpio_request(ifx_dev->gpio.reset, "ifxModem"); - if (ret < 0) { - dev_err(&spi->dev, "Unable to allocate GPIO%d (RESET)", - ifx_dev->gpio.reset); - goto error_ret; - } - ret += gpio_direction_output(ifx_dev->gpio.reset, 0); - ret += gpio_export(ifx_dev->gpio.reset, 1); - if (ret) { - dev_err(&spi->dev, "Unable to configure GPIO%d (RESET)", - ifx_dev->gpio.reset); - ret = -EBUSY; - goto error_ret2; - } - - ret = gpio_request(ifx_dev->gpio.po, "ifxModem"); - ret += gpio_direction_output(ifx_dev->gpio.po, 0); - ret += gpio_export(ifx_dev->gpio.po, 1); - if (ret) { - dev_err(&spi->dev, "Unable to configure GPIO%d (ON)", - ifx_dev->gpio.po); - ret = -EBUSY; - goto error_ret3; - } - - ret = gpio_request(ifx_dev->gpio.mrdy, "ifxModem"); - if (ret < 0) { - dev_err(&spi->dev, "Unable to allocate GPIO%d (MRDY)", - ifx_dev->gpio.mrdy); - goto error_ret3; - } - ret += gpio_export(ifx_dev->gpio.mrdy, 1); - ret += gpio_direction_output(ifx_dev->gpio.mrdy, 0); - if (ret) { - dev_err(&spi->dev, "Unable to configure GPIO%d (MRDY)", - ifx_dev->gpio.mrdy); - ret = -EBUSY; - goto error_ret4; - } - - ret = gpio_request(ifx_dev->gpio.srdy, "ifxModem"); - if (ret < 0) { - dev_err(&spi->dev, "Unable to allocate GPIO%d (SRDY)", - ifx_dev->gpio.srdy); - ret = -EBUSY; - goto error_ret4; - } - ret += gpio_export(ifx_dev->gpio.srdy, 1); - ret += gpio_direction_input(ifx_dev->gpio.srdy); - if (ret) { - dev_err(&spi->dev, "Unable to configure GPIO%d (SRDY)", - ifx_dev->gpio.srdy); - ret = -EBUSY; - goto error_ret5; - } - - ret = gpio_request(ifx_dev->gpio.reset_out, "ifxModem"); - if (ret < 0) { - dev_err(&spi->dev, "Unable to allocate GPIO%d (RESET_OUT)", - ifx_dev->gpio.reset_out); - goto error_ret5; - } - ret += gpio_export(ifx_dev->gpio.reset_out, 1); - ret += gpio_direction_input(ifx_dev->gpio.reset_out); - if (ret) { - dev_err(&spi->dev, "Unable to configure GPIO%d (RESET_OUT)", - ifx_dev->gpio.reset_out); - ret = -EBUSY; - goto error_ret6; - } - - ret = request_irq(gpio_to_irq(ifx_dev->gpio.reset_out), - ifx_spi_reset_interrupt, - IRQF_TRIGGER_RISING|IRQF_TRIGGER_FALLING, DRVNAME, - (void *)ifx_dev); - if (ret) { - dev_err(&spi->dev, "Unable to get irq %x\n", - gpio_to_irq(ifx_dev->gpio.reset_out)); - goto error_ret6; - } - - ret = ifx_spi_reset(ifx_dev); - - ret = request_irq(gpio_to_irq(ifx_dev->gpio.srdy), - ifx_spi_srdy_interrupt, - IRQF_TRIGGER_RISING, DRVNAME, - (void *)ifx_dev); - if (ret) { - dev_err(&spi->dev, "Unable to get irq %x", - gpio_to_irq(ifx_dev->gpio.srdy)); - goto error_ret7; - } - - /* set pm runtime power state and register with power system */ - pm_runtime_set_active(&spi->dev); - pm_runtime_enable(&spi->dev); - - /* handle case that modem is already signaling SRDY */ - /* no outgoing tty open at this point, this just satisfies the - * modem's read and should reset communication properly - */ - srdy = gpio_get_value(ifx_dev->gpio.srdy); - - if (srdy) { - mrdy_assert(ifx_dev); - ifx_spi_handle_srdy(ifx_dev); - } else - mrdy_set_low(ifx_dev); - return 0; - -error_ret7: - free_irq(gpio_to_irq(ifx_dev->gpio.reset_out), (void *)ifx_dev); -error_ret6: - gpio_free(ifx_dev->gpio.srdy); -error_ret5: - gpio_free(ifx_dev->gpio.mrdy); -error_ret4: - gpio_free(ifx_dev->gpio.reset); -error_ret3: - gpio_free(ifx_dev->gpio.po); -error_ret2: - gpio_free(ifx_dev->gpio.reset_out); -error_ret: - ifx_spi_free_device(ifx_dev); - saved_ifx_dev = NULL; - return ret; -} - -/** - * ifx_spi_spi_remove - SPI device was removed - * @spi: SPI device - * - * FIXME: We should be shutting the device down here not in - * the module unload path. - */ - -static int ifx_spi_spi_remove(struct spi_device *spi) -{ - struct ifx_spi_device *ifx_dev = spi_get_drvdata(spi); - /* stop activity */ - tasklet_kill(&ifx_dev->io_work_tasklet); - /* free irq */ - free_irq(gpio_to_irq(ifx_dev->gpio.reset_out), (void *)ifx_dev); - free_irq(gpio_to_irq(ifx_dev->gpio.srdy), (void *)ifx_dev); - - gpio_free(ifx_dev->gpio.srdy); - gpio_free(ifx_dev->gpio.mrdy); - gpio_free(ifx_dev->gpio.reset); - gpio_free(ifx_dev->gpio.po); - gpio_free(ifx_dev->gpio.reset_out); - - /* free allocations */ - ifx_spi_free_device(ifx_dev); - - saved_ifx_dev = NULL; - return 0; -} - -/** - * ifx_spi_spi_shutdown - called on SPI shutdown - * @spi: SPI device - * - * No action needs to be taken here - */ - -static void ifx_spi_spi_shutdown(struct spi_device *spi) -{ -} - -/* - * various suspends and resumes have nothing to do - * no hardware to save state for - */ - -/** - * ifx_spi_spi_suspend - suspend SPI on system suspend - * @dev: device being suspended - * - * Suspend the SPI side. No action needed on Intel MID platforms, may - * need extending for other systems. - */ -static int ifx_spi_spi_suspend(struct spi_device *spi, pm_message_t msg) -{ - return 0; -} - -/** - * ifx_spi_spi_resume - resume SPI side on system resume - * @dev: device being suspended - * - * Suspend the SPI side. No action needed on Intel MID platforms, may - * need extending for other systems. - */ -static int ifx_spi_spi_resume(struct spi_device *spi) -{ - return 0; -} - -/** - * ifx_spi_pm_suspend - suspend modem on system suspend - * @dev: device being suspended - * - * Suspend the modem. No action needed on Intel MID platforms, may - * need extending for other systems. - */ -static int ifx_spi_pm_suspend(struct device *dev) -{ - return 0; -} - -/** - * ifx_spi_pm_resume - resume modem on system resume - * @dev: device being suspended - * - * Allow the modem to resume. No action needed. - * - * FIXME: do we need to reset anything here ? - */ -static int ifx_spi_pm_resume(struct device *dev) -{ - return 0; -} - -/** - * ifx_spi_pm_runtime_resume - suspend modem - * @dev: device being suspended - * - * Allow the modem to resume. No action needed. - */ -static int ifx_spi_pm_runtime_resume(struct device *dev) -{ - return 0; -} - -/** - * ifx_spi_pm_runtime_suspend - suspend modem - * @dev: device being suspended - * - * Allow the modem to suspend and thus suspend to continue up the - * device tree. - */ -static int ifx_spi_pm_runtime_suspend(struct device *dev) -{ - return 0; -} - -/** - * ifx_spi_pm_runtime_idle - check if modem idle - * @dev: our device - * - * Check conditions and queue runtime suspend if idle. - */ -static int ifx_spi_pm_runtime_idle(struct device *dev) -{ - struct spi_device *spi = to_spi_device(dev); - struct ifx_spi_device *ifx_dev = spi_get_drvdata(spi); - - if (!ifx_dev->power_status) - pm_runtime_suspend(dev); - - return 0; -} - -static const struct dev_pm_ops ifx_spi_pm = { - .resume = ifx_spi_pm_resume, - .suspend = ifx_spi_pm_suspend, - .runtime_resume = ifx_spi_pm_runtime_resume, - .runtime_suspend = ifx_spi_pm_runtime_suspend, - .runtime_idle = ifx_spi_pm_runtime_idle -}; - -static const struct spi_device_id ifx_id_table[] = { - {"ifx6160", 0}, - {"ifx6260", 0}, - { } -}; -MODULE_DEVICE_TABLE(spi, ifx_id_table); - -/* spi operations */ -static const struct spi_driver ifx_spi_driver_6160 = { - .driver = { - .name = "ifx6160", - .bus = &spi_bus_type, - .pm = &ifx_spi_pm, - .owner = THIS_MODULE}, - .probe = ifx_spi_spi_probe, - .shutdown = ifx_spi_spi_shutdown, - .remove = __devexit_p(ifx_spi_spi_remove), - .suspend = ifx_spi_spi_suspend, - .resume = ifx_spi_spi_resume, - .id_table = ifx_id_table -}; - -/** - * ifx_spi_exit - module exit - * - * Unload the module. - */ - -static void __exit ifx_spi_exit(void) -{ - /* unregister */ - tty_unregister_driver(tty_drv); - spi_unregister_driver((void *)&ifx_spi_driver_6160); -} - -/** - * ifx_spi_init - module entry point - * - * Initialise the SPI and tty interfaces for the IFX SPI driver - * We need to initialize upper-edge spi driver after the tty - * driver because otherwise the spi probe will race - */ - -static int __init ifx_spi_init(void) -{ - int result; - - tty_drv = alloc_tty_driver(1); - if (!tty_drv) { - pr_err("%s: alloc_tty_driver failed", DRVNAME); - return -ENOMEM; - } - - tty_drv->magic = TTY_DRIVER_MAGIC; - tty_drv->owner = THIS_MODULE; - tty_drv->driver_name = DRVNAME; - tty_drv->name = TTYNAME; - tty_drv->minor_start = IFX_SPI_TTY_ID; - tty_drv->num = 1; - tty_drv->type = TTY_DRIVER_TYPE_SERIAL; - tty_drv->subtype = SERIAL_TYPE_NORMAL; - tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; - tty_drv->init_termios = tty_std_termios; - - tty_set_operations(tty_drv, &ifx_spi_serial_ops); - - result = tty_register_driver(tty_drv); - if (result) { - pr_err("%s: tty_register_driver failed(%d)", - DRVNAME, result); - put_tty_driver(tty_drv); - return result; - } - - result = spi_register_driver((void *)&ifx_spi_driver_6160); - if (result) { - pr_err("%s: spi_register_driver failed(%d)", - DRVNAME, result); - tty_unregister_driver(tty_drv); - } - return result; -} - -module_init(ifx_spi_init); -module_exit(ifx_spi_exit); - -MODULE_AUTHOR("Intel"); -MODULE_DESCRIPTION("IFX6x60 spi driver"); -MODULE_LICENSE("GPL"); -MODULE_INFO(Version, "0.1-IFX6x60"); diff --git a/drivers/serial/ifx6x60.h b/drivers/serial/ifx6x60.h deleted file mode 100644 index deb7b8d977dc..000000000000 --- a/drivers/serial/ifx6x60.h +++ /dev/null @@ -1,129 +0,0 @@ -/**************************************************************************** - * - * Driver for the IFX spi modem. - * - * Copyright (C) 2009, 2010 Intel Corp - * Jim Stanley <jim.stanley@intel.com> - * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, - * USA - * - * - * - *****************************************************************************/ -#ifndef _IFX6X60_H -#define _IFX6X60_H - -#define DRVNAME "ifx6x60" -#define TTYNAME "ttyIFX" - -/* #define IFX_THROTTLE_CODE */ - -#define IFX_SPI_MAX_MINORS 1 -#define IFX_SPI_TRANSFER_SIZE 2048 -#define IFX_SPI_FIFO_SIZE 4096 - -#define IFX_SPI_HEADER_OVERHEAD 4 -#define IFX_RESET_TIMEOUT msecs_to_jiffies(50) - -/* device flags bitfield definitions */ -#define IFX_SPI_STATE_PRESENT 0 -#define IFX_SPI_STATE_IO_IN_PROGRESS 1 -#define IFX_SPI_STATE_IO_READY 2 -#define IFX_SPI_STATE_TIMER_PENDING 3 - -/* flow control bitfields */ -#define IFX_SPI_DCD 0 -#define IFX_SPI_CTS 1 -#define IFX_SPI_DSR 2 -#define IFX_SPI_RI 3 -#define IFX_SPI_DTR 4 -#define IFX_SPI_RTS 5 -#define IFX_SPI_TX_FC 6 -#define IFX_SPI_RX_FC 7 -#define IFX_SPI_UPDATE 8 - -#define IFX_SPI_PAYLOAD_SIZE (IFX_SPI_TRANSFER_SIZE - \ - IFX_SPI_HEADER_OVERHEAD) - -#define IFX_SPI_IRQ_TYPE DETECT_EDGE_RISING -#define IFX_SPI_GPIO_TARGET 0 -#define IFX_SPI_GPIO0 0x105 - -#define IFX_SPI_STATUS_TIMEOUT (2000*HZ) - -/* values for bits in power status byte */ -#define IFX_SPI_POWER_DATA_PENDING 1 -#define IFX_SPI_POWER_SRDY 2 - -struct ifx_spi_device { - /* Our SPI device */ - struct spi_device *spi_dev; - - /* Port specific data */ - struct kfifo tx_fifo; - spinlock_t fifo_lock; - unsigned long signal_state; - - /* TTY Layer logic */ - struct tty_port tty_port; - struct device *tty_dev; - int minor; - - /* Low level I/O work */ - struct tasklet_struct io_work_tasklet; - unsigned long flags; - dma_addr_t rx_dma; - dma_addr_t tx_dma; - - int is_6160; /* Modem type */ - - spinlock_t write_lock; - int write_pending; - spinlock_t power_lock; - unsigned char power_status; - - unsigned char *rx_buffer; - unsigned char *tx_buffer; - dma_addr_t rx_bus; - dma_addr_t tx_bus; - unsigned char spi_more; - unsigned char spi_slave_cts; - - struct timer_list spi_timer; - - struct spi_message spi_msg; - struct spi_transfer spi_xfer; - - struct { - /* gpio lines */ - unsigned short srdy; /* slave-ready gpio */ - unsigned short mrdy; /* master-ready gpio */ - unsigned short reset; /* modem-reset gpio */ - unsigned short po; /* modem-on gpio */ - unsigned short reset_out; /* modem-in-reset gpio */ - /* state/stats */ - int unack_srdy_int_nb; - } gpio; - - /* modem reset */ - unsigned long mdm_reset_state; -#define MR_START 0 -#define MR_INPROGRESS 1 -#define MR_COMPLETE 2 - wait_queue_head_t mdm_reset_wait; -}; - -#endif /* _IFX6X60_H */ diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c deleted file mode 100644 index dfcf4b1878aa..000000000000 --- a/drivers/serial/imx.c +++ /dev/null @@ -1,1380 +0,0 @@ -/* - * linux/drivers/serial/imx.c - * - * Driver for Motorola IMX serial ports - * - * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. - * - * Author: Sascha Hauer <sascha@saschahauer.de> - * Copyright (C) 2004 Pengutronix - * - * Copyright (C) 2009 emlix GmbH - * Author: Fabian Godehardt (added IrDA support for iMX) - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * [29-Mar-2005] Mike Lee - * Added hardware handshake - */ - -#if defined(CONFIG_SERIAL_IMX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/platform_device.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/serial.h> -#include <linux/clk.h> -#include <linux/delay.h> -#include <linux/rational.h> -#include <linux/slab.h> - -#include <asm/io.h> -#include <asm/irq.h> -#include <mach/hardware.h> -#include <mach/imx-uart.h> - -/* Register definitions */ -#define URXD0 0x0 /* Receiver Register */ -#define URTX0 0x40 /* Transmitter Register */ -#define UCR1 0x80 /* Control Register 1 */ -#define UCR2 0x84 /* Control Register 2 */ -#define UCR3 0x88 /* Control Register 3 */ -#define UCR4 0x8c /* Control Register 4 */ -#define UFCR 0x90 /* FIFO Control Register */ -#define USR1 0x94 /* Status Register 1 */ -#define USR2 0x98 /* Status Register 2 */ -#define UESC 0x9c /* Escape Character Register */ -#define UTIM 0xa0 /* Escape Timer Register */ -#define UBIR 0xa4 /* BRM Incremental Register */ -#define UBMR 0xa8 /* BRM Modulator Register */ -#define UBRC 0xac /* Baud Rate Count Register */ -#define MX2_ONEMS 0xb0 /* One Millisecond register */ -#define UTS (cpu_is_mx1() ? 0xd0 : 0xb4) /* UART Test Register */ - -/* UART Control Register Bit Fields.*/ -#define URXD_CHARRDY (1<<15) -#define URXD_ERR (1<<14) -#define URXD_OVRRUN (1<<13) -#define URXD_FRMERR (1<<12) -#define URXD_BRK (1<<11) -#define URXD_PRERR (1<<10) -#define UCR1_ADEN (1<<15) /* Auto dectect interrupt */ -#define UCR1_ADBR (1<<14) /* Auto detect baud rate */ -#define UCR1_TRDYEN (1<<13) /* Transmitter ready interrupt enable */ -#define UCR1_IDEN (1<<12) /* Idle condition interrupt */ -#define UCR1_RRDYEN (1<<9) /* Recv ready interrupt enable */ -#define UCR1_RDMAEN (1<<8) /* Recv ready DMA enable */ -#define UCR1_IREN (1<<7) /* Infrared interface enable */ -#define UCR1_TXMPTYEN (1<<6) /* Transimitter empty interrupt enable */ -#define UCR1_RTSDEN (1<<5) /* RTS delta interrupt enable */ -#define UCR1_SNDBRK (1<<4) /* Send break */ -#define UCR1_TDMAEN (1<<3) /* Transmitter ready DMA enable */ -#define MX1_UCR1_UARTCLKEN (1<<2) /* UART clock enabled, mx1 only */ -#define UCR1_DOZE (1<<1) /* Doze */ -#define UCR1_UARTEN (1<<0) /* UART enabled */ -#define UCR2_ESCI (1<<15) /* Escape seq interrupt enable */ -#define UCR2_IRTS (1<<14) /* Ignore RTS pin */ -#define UCR2_CTSC (1<<13) /* CTS pin control */ -#define UCR2_CTS (1<<12) /* Clear to send */ -#define UCR2_ESCEN (1<<11) /* Escape enable */ -#define UCR2_PREN (1<<8) /* Parity enable */ -#define UCR2_PROE (1<<7) /* Parity odd/even */ -#define UCR2_STPB (1<<6) /* Stop */ -#define UCR2_WS (1<<5) /* Word size */ -#define UCR2_RTSEN (1<<4) /* Request to send interrupt enable */ -#define UCR2_TXEN (1<<2) /* Transmitter enabled */ -#define UCR2_RXEN (1<<1) /* Receiver enabled */ -#define UCR2_SRST (1<<0) /* SW reset */ -#define UCR3_DTREN (1<<13) /* DTR interrupt enable */ -#define UCR3_PARERREN (1<<12) /* Parity enable */ -#define UCR3_FRAERREN (1<<11) /* Frame error interrupt enable */ -#define UCR3_DSR (1<<10) /* Data set ready */ -#define UCR3_DCD (1<<9) /* Data carrier detect */ -#define UCR3_RI (1<<8) /* Ring indicator */ -#define UCR3_TIMEOUTEN (1<<7) /* Timeout interrupt enable */ -#define UCR3_RXDSEN (1<<6) /* Receive status interrupt enable */ -#define UCR3_AIRINTEN (1<<5) /* Async IR wake interrupt enable */ -#define UCR3_AWAKEN (1<<4) /* Async wake interrupt enable */ -#define MX1_UCR3_REF25 (1<<3) /* Ref freq 25 MHz, only on mx1 */ -#define MX1_UCR3_REF30 (1<<2) /* Ref Freq 30 MHz, only on mx1 */ -#define MX2_UCR3_RXDMUXSEL (1<<2) /* RXD Muxed Input Select, on mx2/mx3 */ -#define UCR3_INVT (1<<1) /* Inverted Infrared transmission */ -#define UCR3_BPEN (1<<0) /* Preset registers enable */ -#define UCR4_CTSTL_SHF 10 /* CTS trigger level shift */ -#define UCR4_CTSTL_MASK 0x3F /* CTS trigger is 6 bits wide */ -#define UCR4_INVR (1<<9) /* Inverted infrared reception */ -#define UCR4_ENIRI (1<<8) /* Serial infrared interrupt enable */ -#define UCR4_WKEN (1<<7) /* Wake interrupt enable */ -#define UCR4_REF16 (1<<6) /* Ref freq 16 MHz */ -#define UCR4_IRSC (1<<5) /* IR special case */ -#define UCR4_TCEN (1<<3) /* Transmit complete interrupt enable */ -#define UCR4_BKEN (1<<2) /* Break condition interrupt enable */ -#define UCR4_OREN (1<<1) /* Receiver overrun interrupt enable */ -#define UCR4_DREN (1<<0) /* Recv data ready interrupt enable */ -#define UFCR_RXTL_SHF 0 /* Receiver trigger level shift */ -#define UFCR_RFDIV (7<<7) /* Reference freq divider mask */ -#define UFCR_RFDIV_REG(x) (((x) < 7 ? 6 - (x) : 6) << 7) -#define UFCR_TXTL_SHF 10 /* Transmitter trigger level shift */ -#define USR1_PARITYERR (1<<15) /* Parity error interrupt flag */ -#define USR1_RTSS (1<<14) /* RTS pin status */ -#define USR1_TRDY (1<<13) /* Transmitter ready interrupt/dma flag */ -#define USR1_RTSD (1<<12) /* RTS delta */ -#define USR1_ESCF (1<<11) /* Escape seq interrupt flag */ -#define USR1_FRAMERR (1<<10) /* Frame error interrupt flag */ -#define USR1_RRDY (1<<9) /* Receiver ready interrupt/dma flag */ -#define USR1_TIMEOUT (1<<7) /* Receive timeout interrupt status */ -#define USR1_RXDS (1<<6) /* Receiver idle interrupt flag */ -#define USR1_AIRINT (1<<5) /* Async IR wake interrupt flag */ -#define USR1_AWAKE (1<<4) /* Aysnc wake interrupt flag */ -#define USR2_ADET (1<<15) /* Auto baud rate detect complete */ -#define USR2_TXFE (1<<14) /* Transmit buffer FIFO empty */ -#define USR2_DTRF (1<<13) /* DTR edge interrupt flag */ -#define USR2_IDLE (1<<12) /* Idle condition */ -#define USR2_IRINT (1<<8) /* Serial infrared interrupt flag */ -#define USR2_WAKE (1<<7) /* Wake */ -#define USR2_RTSF (1<<4) /* RTS edge interrupt flag */ -#define USR2_TXDC (1<<3) /* Transmitter complete */ -#define USR2_BRCD (1<<2) /* Break condition */ -#define USR2_ORE (1<<1) /* Overrun error */ -#define USR2_RDR (1<<0) /* Recv data ready */ -#define UTS_FRCPERR (1<<13) /* Force parity error */ -#define UTS_LOOP (1<<12) /* Loop tx and rx */ -#define UTS_TXEMPTY (1<<6) /* TxFIFO empty */ -#define UTS_RXEMPTY (1<<5) /* RxFIFO empty */ -#define UTS_TXFULL (1<<4) /* TxFIFO full */ -#define UTS_RXFULL (1<<3) /* RxFIFO full */ -#define UTS_SOFTRST (1<<0) /* Software reset */ - -/* We've been assigned a range on the "Low-density serial ports" major */ -#define SERIAL_IMX_MAJOR 207 -#define MINOR_START 16 -#define DEV_NAME "ttymxc" -#define MAX_INTERNAL_IRQ MXC_INTERNAL_IRQS - -/* - * This determines how often we check the modem status signals - * for any change. They generally aren't connected to an IRQ - * so we have to poll them. We also check immediately before - * filling the TX fifo incase CTS has been dropped. - */ -#define MCTRL_TIMEOUT (250*HZ/1000) - -#define DRIVER_NAME "IMX-uart" - -#define UART_NR 8 - -struct imx_port { - struct uart_port port; - struct timer_list timer; - unsigned int old_status; - int txirq,rxirq,rtsirq; - unsigned int have_rtscts:1; - unsigned int use_irda:1; - unsigned int irda_inv_rx:1; - unsigned int irda_inv_tx:1; - unsigned short trcv_delay; /* transceiver delay */ - struct clk *clk; -}; - -#ifdef CONFIG_IRDA -#define USE_IRDA(sport) ((sport)->use_irda) -#else -#define USE_IRDA(sport) (0) -#endif - -/* - * Handle any change of modem status signal since we were last called. - */ -static void imx_mctrl_check(struct imx_port *sport) -{ - unsigned int status, changed; - - status = sport->port.ops->get_mctrl(&sport->port); - changed = status ^ sport->old_status; - - if (changed == 0) - return; - - sport->old_status = status; - - if (changed & TIOCM_RI) - sport->port.icount.rng++; - if (changed & TIOCM_DSR) - sport->port.icount.dsr++; - if (changed & TIOCM_CAR) - uart_handle_dcd_change(&sport->port, status & TIOCM_CAR); - if (changed & TIOCM_CTS) - uart_handle_cts_change(&sport->port, status & TIOCM_CTS); - - wake_up_interruptible(&sport->port.state->port.delta_msr_wait); -} - -/* - * This is our per-port timeout handler, for checking the - * modem status signals. - */ -static void imx_timeout(unsigned long data) -{ - struct imx_port *sport = (struct imx_port *)data; - unsigned long flags; - - if (sport->port.state) { - spin_lock_irqsave(&sport->port.lock, flags); - imx_mctrl_check(sport); - spin_unlock_irqrestore(&sport->port.lock, flags); - - mod_timer(&sport->timer, jiffies + MCTRL_TIMEOUT); - } -} - -/* - * interrupts disabled on entry - */ -static void imx_stop_tx(struct uart_port *port) -{ - struct imx_port *sport = (struct imx_port *)port; - unsigned long temp; - - if (USE_IRDA(sport)) { - /* half duplex - wait for end of transmission */ - int n = 256; - while ((--n > 0) && - !(readl(sport->port.membase + USR2) & USR2_TXDC)) { - udelay(5); - barrier(); - } - /* - * irda transceiver - wait a bit more to avoid - * cutoff, hardware dependent - */ - udelay(sport->trcv_delay); - - /* - * half duplex - reactivate receive mode, - * flush receive pipe echo crap - */ - if (readl(sport->port.membase + USR2) & USR2_TXDC) { - temp = readl(sport->port.membase + UCR1); - temp &= ~(UCR1_TXMPTYEN | UCR1_TRDYEN); - writel(temp, sport->port.membase + UCR1); - - temp = readl(sport->port.membase + UCR4); - temp &= ~(UCR4_TCEN); - writel(temp, sport->port.membase + UCR4); - - while (readl(sport->port.membase + URXD0) & - URXD_CHARRDY) - barrier(); - - temp = readl(sport->port.membase + UCR1); - temp |= UCR1_RRDYEN; - writel(temp, sport->port.membase + UCR1); - - temp = readl(sport->port.membase + UCR4); - temp |= UCR4_DREN; - writel(temp, sport->port.membase + UCR4); - } - return; - } - - temp = readl(sport->port.membase + UCR1); - writel(temp & ~UCR1_TXMPTYEN, sport->port.membase + UCR1); -} - -/* - * interrupts disabled on entry - */ -static void imx_stop_rx(struct uart_port *port) -{ - struct imx_port *sport = (struct imx_port *)port; - unsigned long temp; - - temp = readl(sport->port.membase + UCR2); - writel(temp &~ UCR2_RXEN, sport->port.membase + UCR2); -} - -/* - * Set the modem control timer to fire immediately. - */ -static void imx_enable_ms(struct uart_port *port) -{ - struct imx_port *sport = (struct imx_port *)port; - - mod_timer(&sport->timer, jiffies); -} - -static inline void imx_transmit_buffer(struct imx_port *sport) -{ - struct circ_buf *xmit = &sport->port.state->xmit; - - while (!uart_circ_empty(xmit) && - !(readl(sport->port.membase + UTS) & UTS_TXFULL)) { - /* send xmit->buf[xmit->tail] - * out the port here */ - writel(xmit->buf[xmit->tail], sport->port.membase + URTX0); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - sport->port.icount.tx++; - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&sport->port); - - if (uart_circ_empty(xmit)) - imx_stop_tx(&sport->port); -} - -/* - * interrupts disabled on entry - */ -static void imx_start_tx(struct uart_port *port) -{ - struct imx_port *sport = (struct imx_port *)port; - unsigned long temp; - - if (USE_IRDA(sport)) { - /* half duplex in IrDA mode; have to disable receive mode */ - temp = readl(sport->port.membase + UCR4); - temp &= ~(UCR4_DREN); - writel(temp, sport->port.membase + UCR4); - - temp = readl(sport->port.membase + UCR1); - temp &= ~(UCR1_RRDYEN); - writel(temp, sport->port.membase + UCR1); - } - - temp = readl(sport->port.membase + UCR1); - writel(temp | UCR1_TXMPTYEN, sport->port.membase + UCR1); - - if (USE_IRDA(sport)) { - temp = readl(sport->port.membase + UCR1); - temp |= UCR1_TRDYEN; - writel(temp, sport->port.membase + UCR1); - - temp = readl(sport->port.membase + UCR4); - temp |= UCR4_TCEN; - writel(temp, sport->port.membase + UCR4); - } - - if (readl(sport->port.membase + UTS) & UTS_TXEMPTY) - imx_transmit_buffer(sport); -} - -static irqreturn_t imx_rtsint(int irq, void *dev_id) -{ - struct imx_port *sport = dev_id; - unsigned int val = readl(sport->port.membase + USR1) & USR1_RTSS; - unsigned long flags; - - spin_lock_irqsave(&sport->port.lock, flags); - - writel(USR1_RTSD, sport->port.membase + USR1); - uart_handle_cts_change(&sport->port, !!val); - wake_up_interruptible(&sport->port.state->port.delta_msr_wait); - - spin_unlock_irqrestore(&sport->port.lock, flags); - return IRQ_HANDLED; -} - -static irqreturn_t imx_txint(int irq, void *dev_id) -{ - struct imx_port *sport = dev_id; - struct circ_buf *xmit = &sport->port.state->xmit; - unsigned long flags; - - spin_lock_irqsave(&sport->port.lock,flags); - if (sport->port.x_char) - { - /* Send next char */ - writel(sport->port.x_char, sport->port.membase + URTX0); - goto out; - } - - if (uart_circ_empty(xmit) || uart_tx_stopped(&sport->port)) { - imx_stop_tx(&sport->port); - goto out; - } - - imx_transmit_buffer(sport); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&sport->port); - -out: - spin_unlock_irqrestore(&sport->port.lock,flags); - return IRQ_HANDLED; -} - -static irqreturn_t imx_rxint(int irq, void *dev_id) -{ - struct imx_port *sport = dev_id; - unsigned int rx,flg,ignored = 0; - struct tty_struct *tty = sport->port.state->port.tty; - unsigned long flags, temp; - - spin_lock_irqsave(&sport->port.lock,flags); - - while (readl(sport->port.membase + USR2) & USR2_RDR) { - flg = TTY_NORMAL; - sport->port.icount.rx++; - - rx = readl(sport->port.membase + URXD0); - - temp = readl(sport->port.membase + USR2); - if (temp & USR2_BRCD) { - writel(USR2_BRCD, sport->port.membase + USR2); - if (uart_handle_break(&sport->port)) - continue; - } - - if (uart_handle_sysrq_char(&sport->port, (unsigned char)rx)) - continue; - - if (rx & (URXD_PRERR | URXD_OVRRUN | URXD_FRMERR) ) { - if (rx & URXD_PRERR) - sport->port.icount.parity++; - else if (rx & URXD_FRMERR) - sport->port.icount.frame++; - if (rx & URXD_OVRRUN) - sport->port.icount.overrun++; - - if (rx & sport->port.ignore_status_mask) { - if (++ignored > 100) - goto out; - continue; - } - - rx &= sport->port.read_status_mask; - - if (rx & URXD_PRERR) - flg = TTY_PARITY; - else if (rx & URXD_FRMERR) - flg = TTY_FRAME; - if (rx & URXD_OVRRUN) - flg = TTY_OVERRUN; - -#ifdef SUPPORT_SYSRQ - sport->port.sysrq = 0; -#endif - } - - tty_insert_flip_char(tty, rx, flg); - } - -out: - spin_unlock_irqrestore(&sport->port.lock,flags); - tty_flip_buffer_push(tty); - return IRQ_HANDLED; -} - -static irqreturn_t imx_int(int irq, void *dev_id) -{ - struct imx_port *sport = dev_id; - unsigned int sts; - - sts = readl(sport->port.membase + USR1); - - if (sts & USR1_RRDY) - imx_rxint(irq, dev_id); - - if (sts & USR1_TRDY && - readl(sport->port.membase + UCR1) & UCR1_TXMPTYEN) - imx_txint(irq, dev_id); - - if (sts & USR1_RTSD) - imx_rtsint(irq, dev_id); - - return IRQ_HANDLED; -} - -/* - * Return TIOCSER_TEMT when transmitter is not busy. - */ -static unsigned int imx_tx_empty(struct uart_port *port) -{ - struct imx_port *sport = (struct imx_port *)port; - - return (readl(sport->port.membase + USR2) & USR2_TXDC) ? TIOCSER_TEMT : 0; -} - -/* - * We have a modem side uart, so the meanings of RTS and CTS are inverted. - */ -static unsigned int imx_get_mctrl(struct uart_port *port) -{ - struct imx_port *sport = (struct imx_port *)port; - unsigned int tmp = TIOCM_DSR | TIOCM_CAR; - - if (readl(sport->port.membase + USR1) & USR1_RTSS) - tmp |= TIOCM_CTS; - - if (readl(sport->port.membase + UCR2) & UCR2_CTS) - tmp |= TIOCM_RTS; - - return tmp; -} - -static void imx_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct imx_port *sport = (struct imx_port *)port; - unsigned long temp; - - temp = readl(sport->port.membase + UCR2) & ~UCR2_CTS; - - if (mctrl & TIOCM_RTS) - temp |= UCR2_CTS; - - writel(temp, sport->port.membase + UCR2); -} - -/* - * Interrupts always disabled. - */ -static void imx_break_ctl(struct uart_port *port, int break_state) -{ - struct imx_port *sport = (struct imx_port *)port; - unsigned long flags, temp; - - spin_lock_irqsave(&sport->port.lock, flags); - - temp = readl(sport->port.membase + UCR1) & ~UCR1_SNDBRK; - - if ( break_state != 0 ) - temp |= UCR1_SNDBRK; - - writel(temp, sport->port.membase + UCR1); - - spin_unlock_irqrestore(&sport->port.lock, flags); -} - -#define TXTL 2 /* reset default */ -#define RXTL 1 /* reset default */ - -static int imx_setup_ufcr(struct imx_port *sport, unsigned int mode) -{ - unsigned int val; - unsigned int ufcr_rfdiv; - - /* set receiver / transmitter trigger level. - * RFDIV is set such way to satisfy requested uartclk value - */ - val = TXTL << 10 | RXTL; - ufcr_rfdiv = (clk_get_rate(sport->clk) + sport->port.uartclk / 2) - / sport->port.uartclk; - - if(!ufcr_rfdiv) - ufcr_rfdiv = 1; - - val |= UFCR_RFDIV_REG(ufcr_rfdiv); - - writel(val, sport->port.membase + UFCR); - - return 0; -} - -/* half the RX buffer size */ -#define CTSTL 16 - -static int imx_startup(struct uart_port *port) -{ - struct imx_port *sport = (struct imx_port *)port; - int retval; - unsigned long flags, temp; - - imx_setup_ufcr(sport, 0); - - /* disable the DREN bit (Data Ready interrupt enable) before - * requesting IRQs - */ - temp = readl(sport->port.membase + UCR4); - - if (USE_IRDA(sport)) - temp |= UCR4_IRSC; - - /* set the trigger level for CTS */ - temp &= ~(UCR4_CTSTL_MASK<< UCR4_CTSTL_SHF); - temp |= CTSTL<< UCR4_CTSTL_SHF; - - writel(temp & ~UCR4_DREN, sport->port.membase + UCR4); - - if (USE_IRDA(sport)) { - /* reset fifo's and state machines */ - int i = 100; - temp = readl(sport->port.membase + UCR2); - temp &= ~UCR2_SRST; - writel(temp, sport->port.membase + UCR2); - while (!(readl(sport->port.membase + UCR2) & UCR2_SRST) && - (--i > 0)) { - udelay(1); - } - } - - /* - * Allocate the IRQ(s) i.MX1 has three interrupts whereas later - * chips only have one interrupt. - */ - if (sport->txirq > 0) { - retval = request_irq(sport->rxirq, imx_rxint, 0, - DRIVER_NAME, sport); - if (retval) - goto error_out1; - - retval = request_irq(sport->txirq, imx_txint, 0, - DRIVER_NAME, sport); - if (retval) - goto error_out2; - - /* do not use RTS IRQ on IrDA */ - if (!USE_IRDA(sport)) { - retval = request_irq(sport->rtsirq, imx_rtsint, - (sport->rtsirq < MAX_INTERNAL_IRQ) ? 0 : - IRQF_TRIGGER_FALLING | - IRQF_TRIGGER_RISING, - DRIVER_NAME, sport); - if (retval) - goto error_out3; - } - } else { - retval = request_irq(sport->port.irq, imx_int, 0, - DRIVER_NAME, sport); - if (retval) { - free_irq(sport->port.irq, sport); - goto error_out1; - } - } - - /* - * Finally, clear and enable interrupts - */ - writel(USR1_RTSD, sport->port.membase + USR1); - - temp = readl(sport->port.membase + UCR1); - temp |= UCR1_RRDYEN | UCR1_RTSDEN | UCR1_UARTEN; - - if (USE_IRDA(sport)) { - temp |= UCR1_IREN; - temp &= ~(UCR1_RTSDEN); - } - - writel(temp, sport->port.membase + UCR1); - - temp = readl(sport->port.membase + UCR2); - temp |= (UCR2_RXEN | UCR2_TXEN); - writel(temp, sport->port.membase + UCR2); - - if (USE_IRDA(sport)) { - /* clear RX-FIFO */ - int i = 64; - while ((--i > 0) && - (readl(sport->port.membase + URXD0) & URXD_CHARRDY)) { - barrier(); - } - } - - if (!cpu_is_mx1()) { - temp = readl(sport->port.membase + UCR3); - temp |= MX2_UCR3_RXDMUXSEL; - writel(temp, sport->port.membase + UCR3); - } - - if (USE_IRDA(sport)) { - temp = readl(sport->port.membase + UCR4); - if (sport->irda_inv_rx) - temp |= UCR4_INVR; - else - temp &= ~(UCR4_INVR); - writel(temp | UCR4_DREN, sport->port.membase + UCR4); - - temp = readl(sport->port.membase + UCR3); - if (sport->irda_inv_tx) - temp |= UCR3_INVT; - else - temp &= ~(UCR3_INVT); - writel(temp, sport->port.membase + UCR3); - } - - /* - * Enable modem status interrupts - */ - spin_lock_irqsave(&sport->port.lock,flags); - imx_enable_ms(&sport->port); - spin_unlock_irqrestore(&sport->port.lock,flags); - - if (USE_IRDA(sport)) { - struct imxuart_platform_data *pdata; - pdata = sport->port.dev->platform_data; - sport->irda_inv_rx = pdata->irda_inv_rx; - sport->irda_inv_tx = pdata->irda_inv_tx; - sport->trcv_delay = pdata->transceiver_delay; - if (pdata->irda_enable) - pdata->irda_enable(1); - } - - return 0; - -error_out3: - if (sport->txirq) - free_irq(sport->txirq, sport); -error_out2: - if (sport->rxirq) - free_irq(sport->rxirq, sport); -error_out1: - return retval; -} - -static void imx_shutdown(struct uart_port *port) -{ - struct imx_port *sport = (struct imx_port *)port; - unsigned long temp; - - temp = readl(sport->port.membase + UCR2); - temp &= ~(UCR2_TXEN); - writel(temp, sport->port.membase + UCR2); - - if (USE_IRDA(sport)) { - struct imxuart_platform_data *pdata; - pdata = sport->port.dev->platform_data; - if (pdata->irda_enable) - pdata->irda_enable(0); - } - - /* - * Stop our timer. - */ - del_timer_sync(&sport->timer); - - /* - * Free the interrupts - */ - if (sport->txirq > 0) { - if (!USE_IRDA(sport)) - free_irq(sport->rtsirq, sport); - free_irq(sport->txirq, sport); - free_irq(sport->rxirq, sport); - } else - free_irq(sport->port.irq, sport); - - /* - * Disable all interrupts, port and break condition. - */ - - temp = readl(sport->port.membase + UCR1); - temp &= ~(UCR1_TXMPTYEN | UCR1_RRDYEN | UCR1_RTSDEN | UCR1_UARTEN); - if (USE_IRDA(sport)) - temp &= ~(UCR1_IREN); - - writel(temp, sport->port.membase + UCR1); -} - -static void -imx_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct imx_port *sport = (struct imx_port *)port; - unsigned long flags; - unsigned int ucr2, old_ucr1, old_txrxen, baud, quot; - unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8; - unsigned int div, ufcr; - unsigned long num, denom; - uint64_t tdiv64; - - /* - * If we don't support modem control lines, don't allow - * these to be set. - */ - if (0) { - termios->c_cflag &= ~(HUPCL | CRTSCTS | CMSPAR); - termios->c_cflag |= CLOCAL; - } - - /* - * We only support CS7 and CS8. - */ - while ((termios->c_cflag & CSIZE) != CS7 && - (termios->c_cflag & CSIZE) != CS8) { - termios->c_cflag &= ~CSIZE; - termios->c_cflag |= old_csize; - old_csize = CS8; - } - - if ((termios->c_cflag & CSIZE) == CS8) - ucr2 = UCR2_WS | UCR2_SRST | UCR2_IRTS; - else - ucr2 = UCR2_SRST | UCR2_IRTS; - - if (termios->c_cflag & CRTSCTS) { - if( sport->have_rtscts ) { - ucr2 &= ~UCR2_IRTS; - ucr2 |= UCR2_CTSC; - } else { - termios->c_cflag &= ~CRTSCTS; - } - } - - if (termios->c_cflag & CSTOPB) - ucr2 |= UCR2_STPB; - if (termios->c_cflag & PARENB) { - ucr2 |= UCR2_PREN; - if (termios->c_cflag & PARODD) - ucr2 |= UCR2_PROE; - } - - /* - * Ask the core to calculate the divisor for us. - */ - baud = uart_get_baud_rate(port, termios, old, 50, port->uartclk / 16); - quot = uart_get_divisor(port, baud); - - spin_lock_irqsave(&sport->port.lock, flags); - - sport->port.read_status_mask = 0; - if (termios->c_iflag & INPCK) - sport->port.read_status_mask |= (URXD_FRMERR | URXD_PRERR); - if (termios->c_iflag & (BRKINT | PARMRK)) - sport->port.read_status_mask |= URXD_BRK; - - /* - * Characters to ignore - */ - sport->port.ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - sport->port.ignore_status_mask |= URXD_PRERR; - if (termios->c_iflag & IGNBRK) { - sport->port.ignore_status_mask |= URXD_BRK; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - sport->port.ignore_status_mask |= URXD_OVRRUN; - } - - del_timer_sync(&sport->timer); - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - /* - * disable interrupts and drain transmitter - */ - old_ucr1 = readl(sport->port.membase + UCR1); - writel(old_ucr1 & ~(UCR1_TXMPTYEN | UCR1_RRDYEN | UCR1_RTSDEN), - sport->port.membase + UCR1); - - while ( !(readl(sport->port.membase + USR2) & USR2_TXDC)) - barrier(); - - /* then, disable everything */ - old_txrxen = readl(sport->port.membase + UCR2); - writel(old_txrxen & ~( UCR2_TXEN | UCR2_RXEN), - sport->port.membase + UCR2); - old_txrxen &= (UCR2_TXEN | UCR2_RXEN); - - if (USE_IRDA(sport)) { - /* - * use maximum available submodule frequency to - * avoid missing short pulses due to low sampling rate - */ - div = 1; - } else { - div = sport->port.uartclk / (baud * 16); - if (div > 7) - div = 7; - if (!div) - div = 1; - } - - rational_best_approximation(16 * div * baud, sport->port.uartclk, - 1 << 16, 1 << 16, &num, &denom); - - tdiv64 = sport->port.uartclk; - tdiv64 *= num; - do_div(tdiv64, denom * 16 * div); - tty_termios_encode_baud_rate(termios, - (speed_t)tdiv64, (speed_t)tdiv64); - - num -= 1; - denom -= 1; - - ufcr = readl(sport->port.membase + UFCR); - ufcr = (ufcr & (~UFCR_RFDIV)) | UFCR_RFDIV_REG(div); - writel(ufcr, sport->port.membase + UFCR); - - writel(num, sport->port.membase + UBIR); - writel(denom, sport->port.membase + UBMR); - - if (!cpu_is_mx1()) - writel(sport->port.uartclk / div / 1000, - sport->port.membase + MX2_ONEMS); - - writel(old_ucr1, sport->port.membase + UCR1); - - /* set the parity, stop bits and data size */ - writel(ucr2 | old_txrxen, sport->port.membase + UCR2); - - if (UART_ENABLE_MS(&sport->port, termios->c_cflag)) - imx_enable_ms(&sport->port); - - spin_unlock_irqrestore(&sport->port.lock, flags); -} - -static const char *imx_type(struct uart_port *port) -{ - struct imx_port *sport = (struct imx_port *)port; - - return sport->port.type == PORT_IMX ? "IMX" : NULL; -} - -/* - * Release the memory region(s) being used by 'port'. - */ -static void imx_release_port(struct uart_port *port) -{ - struct platform_device *pdev = to_platform_device(port->dev); - struct resource *mmres; - - mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0); - release_mem_region(mmres->start, mmres->end - mmres->start + 1); -} - -/* - * Request the memory region(s) being used by 'port'. - */ -static int imx_request_port(struct uart_port *port) -{ - struct platform_device *pdev = to_platform_device(port->dev); - struct resource *mmres; - void *ret; - - mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!mmres) - return -ENODEV; - - ret = request_mem_region(mmres->start, mmres->end - mmres->start + 1, - "imx-uart"); - - return ret ? 0 : -EBUSY; -} - -/* - * Configure/autoconfigure the port. - */ -static void imx_config_port(struct uart_port *port, int flags) -{ - struct imx_port *sport = (struct imx_port *)port; - - if (flags & UART_CONFIG_TYPE && - imx_request_port(&sport->port) == 0) - sport->port.type = PORT_IMX; -} - -/* - * Verify the new serial_struct (for TIOCSSERIAL). - * The only change we allow are to the flags and type, and - * even then only between PORT_IMX and PORT_UNKNOWN - */ -static int -imx_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - struct imx_port *sport = (struct imx_port *)port; - int ret = 0; - - if (ser->type != PORT_UNKNOWN && ser->type != PORT_IMX) - ret = -EINVAL; - if (sport->port.irq != ser->irq) - ret = -EINVAL; - if (ser->io_type != UPIO_MEM) - ret = -EINVAL; - if (sport->port.uartclk / 16 != ser->baud_base) - ret = -EINVAL; - if ((void *)sport->port.mapbase != ser->iomem_base) - ret = -EINVAL; - if (sport->port.iobase != ser->port) - ret = -EINVAL; - if (ser->hub6 != 0) - ret = -EINVAL; - return ret; -} - -static struct uart_ops imx_pops = { - .tx_empty = imx_tx_empty, - .set_mctrl = imx_set_mctrl, - .get_mctrl = imx_get_mctrl, - .stop_tx = imx_stop_tx, - .start_tx = imx_start_tx, - .stop_rx = imx_stop_rx, - .enable_ms = imx_enable_ms, - .break_ctl = imx_break_ctl, - .startup = imx_startup, - .shutdown = imx_shutdown, - .set_termios = imx_set_termios, - .type = imx_type, - .release_port = imx_release_port, - .request_port = imx_request_port, - .config_port = imx_config_port, - .verify_port = imx_verify_port, -}; - -static struct imx_port *imx_ports[UART_NR]; - -#ifdef CONFIG_SERIAL_IMX_CONSOLE -static void imx_console_putchar(struct uart_port *port, int ch) -{ - struct imx_port *sport = (struct imx_port *)port; - - while (readl(sport->port.membase + UTS) & UTS_TXFULL) - barrier(); - - writel(ch, sport->port.membase + URTX0); -} - -/* - * Interrupts are disabled on entering - */ -static void -imx_console_write(struct console *co, const char *s, unsigned int count) -{ - struct imx_port *sport = imx_ports[co->index]; - unsigned int old_ucr1, old_ucr2, ucr1; - - /* - * First, save UCR1/2 and then disable interrupts - */ - ucr1 = old_ucr1 = readl(sport->port.membase + UCR1); - old_ucr2 = readl(sport->port.membase + UCR2); - - if (cpu_is_mx1()) - ucr1 |= MX1_UCR1_UARTCLKEN; - ucr1 |= UCR1_UARTEN; - ucr1 &= ~(UCR1_TXMPTYEN | UCR1_RRDYEN | UCR1_RTSDEN); - - writel(ucr1, sport->port.membase + UCR1); - - writel(old_ucr2 | UCR2_TXEN, sport->port.membase + UCR2); - - uart_console_write(&sport->port, s, count, imx_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore UCR1/2 - */ - while (!(readl(sport->port.membase + USR2) & USR2_TXDC)); - - writel(old_ucr1, sport->port.membase + UCR1); - writel(old_ucr2, sport->port.membase + UCR2); -} - -/* - * If the port was already initialised (eg, by a boot loader), - * try to determine the current setup. - */ -static void __init -imx_console_get_options(struct imx_port *sport, int *baud, - int *parity, int *bits) -{ - - if (readl(sport->port.membase + UCR1) & UCR1_UARTEN) { - /* ok, the port was enabled */ - unsigned int ucr2, ubir,ubmr, uartclk; - unsigned int baud_raw; - unsigned int ucfr_rfdiv; - - ucr2 = readl(sport->port.membase + UCR2); - - *parity = 'n'; - if (ucr2 & UCR2_PREN) { - if (ucr2 & UCR2_PROE) - *parity = 'o'; - else - *parity = 'e'; - } - - if (ucr2 & UCR2_WS) - *bits = 8; - else - *bits = 7; - - ubir = readl(sport->port.membase + UBIR) & 0xffff; - ubmr = readl(sport->port.membase + UBMR) & 0xffff; - - ucfr_rfdiv = (readl(sport->port.membase + UFCR) & UFCR_RFDIV) >> 7; - if (ucfr_rfdiv == 6) - ucfr_rfdiv = 7; - else - ucfr_rfdiv = 6 - ucfr_rfdiv; - - uartclk = clk_get_rate(sport->clk); - uartclk /= ucfr_rfdiv; - - { /* - * The next code provides exact computation of - * baud_raw = round(((uartclk/16) * (ubir + 1)) / (ubmr + 1)) - * without need of float support or long long division, - * which would be required to prevent 32bit arithmetic overflow - */ - unsigned int mul = ubir + 1; - unsigned int div = 16 * (ubmr + 1); - unsigned int rem = uartclk % div; - - baud_raw = (uartclk / div) * mul; - baud_raw += (rem * mul + div / 2) / div; - *baud = (baud_raw + 50) / 100 * 100; - } - - if(*baud != baud_raw) - printk(KERN_INFO "Serial: Console IMX rounded baud rate from %d to %d\n", - baud_raw, *baud); - } -} - -static int __init -imx_console_setup(struct console *co, char *options) -{ - struct imx_port *sport; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - if (co->index == -1 || co->index >= ARRAY_SIZE(imx_ports)) - co->index = 0; - sport = imx_ports[co->index]; - if(sport == NULL) - return -ENODEV; - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - else - imx_console_get_options(sport, &baud, &parity, &bits); - - imx_setup_ufcr(sport, 0); - - return uart_set_options(&sport->port, co, baud, parity, bits, flow); -} - -static struct uart_driver imx_reg; -static struct console imx_console = { - .name = DEV_NAME, - .write = imx_console_write, - .device = uart_console_device, - .setup = imx_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &imx_reg, -}; - -#define IMX_CONSOLE &imx_console -#else -#define IMX_CONSOLE NULL -#endif - -static struct uart_driver imx_reg = { - .owner = THIS_MODULE, - .driver_name = DRIVER_NAME, - .dev_name = DEV_NAME, - .major = SERIAL_IMX_MAJOR, - .minor = MINOR_START, - .nr = ARRAY_SIZE(imx_ports), - .cons = IMX_CONSOLE, -}; - -static int serial_imx_suspend(struct platform_device *dev, pm_message_t state) -{ - struct imx_port *sport = platform_get_drvdata(dev); - - if (sport) - uart_suspend_port(&imx_reg, &sport->port); - - return 0; -} - -static int serial_imx_resume(struct platform_device *dev) -{ - struct imx_port *sport = platform_get_drvdata(dev); - - if (sport) - uart_resume_port(&imx_reg, &sport->port); - - return 0; -} - -static int serial_imx_probe(struct platform_device *pdev) -{ - struct imx_port *sport; - struct imxuart_platform_data *pdata; - void __iomem *base; - int ret = 0; - struct resource *res; - - sport = kzalloc(sizeof(*sport), GFP_KERNEL); - if (!sport) - return -ENOMEM; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - ret = -ENODEV; - goto free; - } - - base = ioremap(res->start, PAGE_SIZE); - if (!base) { - ret = -ENOMEM; - goto free; - } - - sport->port.dev = &pdev->dev; - sport->port.mapbase = res->start; - sport->port.membase = base; - sport->port.type = PORT_IMX, - sport->port.iotype = UPIO_MEM; - sport->port.irq = platform_get_irq(pdev, 0); - sport->rxirq = platform_get_irq(pdev, 0); - sport->txirq = platform_get_irq(pdev, 1); - sport->rtsirq = platform_get_irq(pdev, 2); - sport->port.fifosize = 32; - sport->port.ops = &imx_pops; - sport->port.flags = UPF_BOOT_AUTOCONF; - sport->port.line = pdev->id; - init_timer(&sport->timer); - sport->timer.function = imx_timeout; - sport->timer.data = (unsigned long)sport; - - sport->clk = clk_get(&pdev->dev, "uart"); - if (IS_ERR(sport->clk)) { - ret = PTR_ERR(sport->clk); - goto unmap; - } - clk_enable(sport->clk); - - sport->port.uartclk = clk_get_rate(sport->clk); - - imx_ports[pdev->id] = sport; - - pdata = pdev->dev.platform_data; - if (pdata && (pdata->flags & IMXUART_HAVE_RTSCTS)) - sport->have_rtscts = 1; - -#ifdef CONFIG_IRDA - if (pdata && (pdata->flags & IMXUART_IRDA)) - sport->use_irda = 1; -#endif - - if (pdata && pdata->init) { - ret = pdata->init(pdev); - if (ret) - goto clkput; - } - - ret = uart_add_one_port(&imx_reg, &sport->port); - if (ret) - goto deinit; - platform_set_drvdata(pdev, &sport->port); - - return 0; -deinit: - if (pdata && pdata->exit) - pdata->exit(pdev); -clkput: - clk_put(sport->clk); - clk_disable(sport->clk); -unmap: - iounmap(sport->port.membase); -free: - kfree(sport); - - return ret; -} - -static int serial_imx_remove(struct platform_device *pdev) -{ - struct imxuart_platform_data *pdata; - struct imx_port *sport = platform_get_drvdata(pdev); - - pdata = pdev->dev.platform_data; - - platform_set_drvdata(pdev, NULL); - - if (sport) { - uart_remove_one_port(&imx_reg, &sport->port); - clk_put(sport->clk); - } - - clk_disable(sport->clk); - - if (pdata && pdata->exit) - pdata->exit(pdev); - - iounmap(sport->port.membase); - kfree(sport); - - return 0; -} - -static struct platform_driver serial_imx_driver = { - .probe = serial_imx_probe, - .remove = serial_imx_remove, - - .suspend = serial_imx_suspend, - .resume = serial_imx_resume, - .driver = { - .name = "imx-uart", - .owner = THIS_MODULE, - }, -}; - -static int __init imx_serial_init(void) -{ - int ret; - - printk(KERN_INFO "Serial: IMX driver\n"); - - ret = uart_register_driver(&imx_reg); - if (ret) - return ret; - - ret = platform_driver_register(&serial_imx_driver); - if (ret != 0) - uart_unregister_driver(&imx_reg); - - return 0; -} - -static void __exit imx_serial_exit(void) -{ - platform_driver_unregister(&serial_imx_driver); - uart_unregister_driver(&imx_reg); -} - -module_init(imx_serial_init); -module_exit(imx_serial_exit); - -MODULE_AUTHOR("Sascha Hauer"); -MODULE_DESCRIPTION("IMX generic serial port driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:imx-uart"); diff --git a/drivers/serial/ioc3_serial.c b/drivers/serial/ioc3_serial.c deleted file mode 100644 index ee43efc7bdcc..000000000000 --- a/drivers/serial/ioc3_serial.c +++ /dev/null @@ -1,2199 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2005 Silicon Graphics, Inc. All Rights Reserved. - */ - -/* - * This file contains a module version of the ioc3 serial driver. This - * includes all the support functions needed (support functions, etc.) - * and the serial driver itself. - */ -#include <linux/errno.h> -#include <linux/tty.h> -#include <linux/serial.h> -#include <linux/circ_buf.h> -#include <linux/serial_reg.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/serial_core.h> -#include <linux/ioc3.h> -#include <linux/slab.h> - -/* - * Interesting things about the ioc3 - */ - -#define LOGICAL_PORTS 2 /* rs232(0) and rs422(1) */ -#define PORTS_PER_CARD 2 -#define LOGICAL_PORTS_PER_CARD (PORTS_PER_CARD * LOGICAL_PORTS) -#define MAX_CARDS 8 -#define MAX_LOGICAL_PORTS (LOGICAL_PORTS_PER_CARD * MAX_CARDS) - -/* determine given the sio_ir what port it applies to */ -#define GET_PORT_FROM_SIO_IR(_x) (_x & SIO_IR_SA) ? 0 : 1 - - -/* - * we have 2 logical ports (rs232, rs422) for each physical port - * evens are rs232, odds are rs422 - */ -#define GET_PHYSICAL_PORT(_x) ((_x) >> 1) -#define GET_LOGICAL_PORT(_x) ((_x) & 1) -#define IS_PHYSICAL_PORT(_x) !((_x) & 1) -#define IS_RS232(_x) !((_x) & 1) - -static unsigned int Num_of_ioc3_cards; -static unsigned int Submodule_slot; - -/* defining this will get you LOTS of great debug info */ -//#define DEBUG_INTERRUPTS -#define DPRINT_CONFIG(_x...) ; -//#define DPRINT_CONFIG(_x...) printk _x -#define NOT_PROGRESS() ; -//#define NOT_PROGRESS() printk("%s : fails %d\n", __func__, __LINE__) - -/* number of characters we want to transmit to the lower level at a time */ -#define MAX_CHARS 256 -#define FIFO_SIZE (MAX_CHARS-1) /* it's a uchar */ - -/* Device name we're using */ -#define DEVICE_NAME "ttySIOC" -#define DEVICE_MAJOR 204 -#define DEVICE_MINOR 116 - -/* flags for next_char_state */ -#define NCS_BREAK 0x1 -#define NCS_PARITY 0x2 -#define NCS_FRAMING 0x4 -#define NCS_OVERRUN 0x8 - -/* cause we need SOME parameters ... */ -#define MIN_BAUD_SUPPORTED 1200 -#define MAX_BAUD_SUPPORTED 115200 - -/* protocol types supported */ -#define PROTO_RS232 0 -#define PROTO_RS422 1 - -/* Notification types */ -#define N_DATA_READY 0x01 -#define N_OUTPUT_LOWAT 0x02 -#define N_BREAK 0x04 -#define N_PARITY_ERROR 0x08 -#define N_FRAMING_ERROR 0x10 -#define N_OVERRUN_ERROR 0x20 -#define N_DDCD 0x40 -#define N_DCTS 0x80 - -#define N_ALL_INPUT (N_DATA_READY | N_BREAK \ - | N_PARITY_ERROR | N_FRAMING_ERROR \ - | N_OVERRUN_ERROR | N_DDCD | N_DCTS) - -#define N_ALL_OUTPUT N_OUTPUT_LOWAT - -#define N_ALL_ERRORS (N_PARITY_ERROR | N_FRAMING_ERROR \ - | N_OVERRUN_ERROR) - -#define N_ALL (N_DATA_READY | N_OUTPUT_LOWAT | N_BREAK \ - | N_PARITY_ERROR | N_FRAMING_ERROR \ - | N_OVERRUN_ERROR | N_DDCD | N_DCTS) - -#define SER_CLK_SPEED(prediv) ((22000000 << 1) / prediv) -#define SER_DIVISOR(x, clk) (((clk) + (x) * 8) / ((x) * 16)) -#define DIVISOR_TO_BAUD(div, clk) ((clk) / 16 / (div)) - -/* Some masks */ -#define LCR_MASK_BITS_CHAR (UART_LCR_WLEN5 | UART_LCR_WLEN6 \ - | UART_LCR_WLEN7 | UART_LCR_WLEN8) -#define LCR_MASK_STOP_BITS (UART_LCR_STOP) - -#define PENDING(_a, _p) (readl(&(_p)->vma->sio_ir) & (_a)->ic_enable) - -#define RING_BUF_SIZE 4096 -#define BUF_SIZE_BIT SBBR_L_SIZE -#define PROD_CONS_MASK PROD_CONS_PTR_4K - -#define TOTAL_RING_BUF_SIZE (RING_BUF_SIZE * 4) - -/* driver specific - one per card */ -struct ioc3_card { - struct { - /* uart ports are allocated here */ - struct uart_port icp_uart_port[LOGICAL_PORTS]; - /* the ioc3_port used for this port */ - struct ioc3_port *icp_port; - } ic_port[PORTS_PER_CARD]; - /* currently enabled interrupts */ - uint32_t ic_enable; -}; - -/* Local port info for each IOC3 serial port */ -struct ioc3_port { - /* handy reference material */ - struct uart_port *ip_port; - struct ioc3_card *ip_card; - struct ioc3_driver_data *ip_idd; - struct ioc3_submodule *ip_is; - - /* pci mem addresses for this port */ - struct ioc3_serialregs __iomem *ip_serial_regs; - struct ioc3_uartregs __iomem *ip_uart_regs; - - /* Ring buffer page for this port */ - dma_addr_t ip_dma_ringbuf; - /* vaddr of ring buffer */ - struct ring_buffer *ip_cpu_ringbuf; - - /* Rings for this port */ - struct ring *ip_inring; - struct ring *ip_outring; - - /* Hook to port specific values */ - struct port_hooks *ip_hooks; - - spinlock_t ip_lock; - - /* Various rx/tx parameters */ - int ip_baud; - int ip_tx_lowat; - int ip_rx_timeout; - - /* Copy of notification bits */ - int ip_notify; - - /* Shadow copies of various registers so we don't need to PIO - * read them constantly - */ - uint32_t ip_sscr; - uint32_t ip_tx_prod; - uint32_t ip_rx_cons; - unsigned char ip_flags; -}; - -/* tx low water mark. We need to notify the driver whenever tx is getting - * close to empty so it can refill the tx buffer and keep things going. - * Let's assume that if we interrupt 1 ms before the tx goes idle, we'll - * have no trouble getting in more chars in time (I certainly hope so). - */ -#define TX_LOWAT_LATENCY 1000 -#define TX_LOWAT_HZ (1000000 / TX_LOWAT_LATENCY) -#define TX_LOWAT_CHARS(baud) (baud / 10 / TX_LOWAT_HZ) - -/* Flags per port */ -#define INPUT_HIGH 0x01 - /* used to signify that we have turned off the rx_high - * temporarily - we need to drain the fifo and don't - * want to get blasted with interrupts. - */ -#define DCD_ON 0x02 - /* DCD state is on */ -#define LOWAT_WRITTEN 0x04 -#define READ_ABORTED 0x08 - /* the read was aborted - used to avaoid infinate looping - * in the interrupt handler - */ -#define INPUT_ENABLE 0x10 - -/* Since each port has different register offsets and bitmasks - * for everything, we'll store those that we need in tables so we - * don't have to be constantly checking the port we are dealing with. - */ -struct port_hooks { - uint32_t intr_delta_dcd; - uint32_t intr_delta_cts; - uint32_t intr_tx_mt; - uint32_t intr_rx_timer; - uint32_t intr_rx_high; - uint32_t intr_tx_explicit; - uint32_t intr_clear; - uint32_t intr_all; - char rs422_select_pin; -}; - -static struct port_hooks hooks_array[PORTS_PER_CARD] = { - /* values for port A */ - { - .intr_delta_dcd = SIO_IR_SA_DELTA_DCD, - .intr_delta_cts = SIO_IR_SA_DELTA_CTS, - .intr_tx_mt = SIO_IR_SA_TX_MT, - .intr_rx_timer = SIO_IR_SA_RX_TIMER, - .intr_rx_high = SIO_IR_SA_RX_HIGH, - .intr_tx_explicit = SIO_IR_SA_TX_EXPLICIT, - .intr_clear = (SIO_IR_SA_TX_MT | SIO_IR_SA_RX_FULL - | SIO_IR_SA_RX_HIGH - | SIO_IR_SA_RX_TIMER - | SIO_IR_SA_DELTA_DCD - | SIO_IR_SA_DELTA_CTS - | SIO_IR_SA_INT - | SIO_IR_SA_TX_EXPLICIT - | SIO_IR_SA_MEMERR), - .intr_all = SIO_IR_SA, - .rs422_select_pin = GPPR_UARTA_MODESEL_PIN, - }, - - /* values for port B */ - { - .intr_delta_dcd = SIO_IR_SB_DELTA_DCD, - .intr_delta_cts = SIO_IR_SB_DELTA_CTS, - .intr_tx_mt = SIO_IR_SB_TX_MT, - .intr_rx_timer = SIO_IR_SB_RX_TIMER, - .intr_rx_high = SIO_IR_SB_RX_HIGH, - .intr_tx_explicit = SIO_IR_SB_TX_EXPLICIT, - .intr_clear = (SIO_IR_SB_TX_MT | SIO_IR_SB_RX_FULL - | SIO_IR_SB_RX_HIGH - | SIO_IR_SB_RX_TIMER - | SIO_IR_SB_DELTA_DCD - | SIO_IR_SB_DELTA_CTS - | SIO_IR_SB_INT - | SIO_IR_SB_TX_EXPLICIT - | SIO_IR_SB_MEMERR), - .intr_all = SIO_IR_SB, - .rs422_select_pin = GPPR_UARTB_MODESEL_PIN, - } -}; - -struct ring_entry { - union { - struct { - uint32_t alldata; - uint32_t allsc; - } all; - struct { - char data[4]; /* data bytes */ - char sc[4]; /* status/control */ - } s; - } u; -}; - -/* Test the valid bits in any of the 4 sc chars using "allsc" member */ -#define RING_ANY_VALID \ - ((uint32_t)(RXSB_MODEM_VALID | RXSB_DATA_VALID) * 0x01010101) - -#define ring_sc u.s.sc -#define ring_data u.s.data -#define ring_allsc u.all.allsc - -/* Number of entries per ring buffer. */ -#define ENTRIES_PER_RING (RING_BUF_SIZE / (int) sizeof(struct ring_entry)) - -/* An individual ring */ -struct ring { - struct ring_entry entries[ENTRIES_PER_RING]; -}; - -/* The whole enchilada */ -struct ring_buffer { - struct ring TX_A; - struct ring RX_A; - struct ring TX_B; - struct ring RX_B; -}; - -/* Get a ring from a port struct */ -#define RING(_p, _wh) &(((struct ring_buffer *)((_p)->ip_cpu_ringbuf))->_wh) - -/* for Infinite loop detection */ -#define MAXITER 10000000 - - -/** - * set_baud - Baud rate setting code - * @port: port to set - * @baud: baud rate to use - */ -static int set_baud(struct ioc3_port *port, int baud) -{ - int divisor; - int actual_baud; - int diff; - int lcr, prediv; - struct ioc3_uartregs __iomem *uart; - - for (prediv = 6; prediv < 64; prediv++) { - divisor = SER_DIVISOR(baud, SER_CLK_SPEED(prediv)); - if (!divisor) - continue; /* invalid divisor */ - actual_baud = DIVISOR_TO_BAUD(divisor, SER_CLK_SPEED(prediv)); - - diff = actual_baud - baud; - if (diff < 0) - diff = -diff; - - /* if we're within 1% we've found a match */ - if (diff * 100 <= actual_baud) - break; - } - - /* if the above loop completed, we didn't match - * the baud rate. give up. - */ - if (prediv == 64) { - NOT_PROGRESS(); - return 1; - } - - uart = port->ip_uart_regs; - lcr = readb(&uart->iu_lcr); - - writeb(lcr | UART_LCR_DLAB, &uart->iu_lcr); - writeb((unsigned char)divisor, &uart->iu_dll); - writeb((unsigned char)(divisor >> 8), &uart->iu_dlm); - writeb((unsigned char)prediv, &uart->iu_scr); - writeb((unsigned char)lcr, &uart->iu_lcr); - - return 0; -} - -/** - * get_ioc3_port - given a uart port, return the control structure - * @the_port: uart port to find - */ -static struct ioc3_port *get_ioc3_port(struct uart_port *the_port) -{ - struct ioc3_driver_data *idd = dev_get_drvdata(the_port->dev); - struct ioc3_card *card_ptr = idd->data[Submodule_slot]; - int ii, jj; - - if (!card_ptr) { - NOT_PROGRESS(); - return NULL; - } - for (ii = 0; ii < PORTS_PER_CARD; ii++) { - for (jj = 0; jj < LOGICAL_PORTS; jj++) { - if (the_port == &card_ptr->ic_port[ii].icp_uart_port[jj]) - return card_ptr->ic_port[ii].icp_port; - } - } - NOT_PROGRESS(); - return NULL; -} - -/** - * port_init - Initialize the sio and ioc3 hardware for a given port - * called per port from attach... - * @port: port to initialize - */ -static int inline port_init(struct ioc3_port *port) -{ - uint32_t sio_cr; - struct port_hooks *hooks = port->ip_hooks; - struct ioc3_uartregs __iomem *uart; - int reset_loop_counter = 0xfffff; - struct ioc3_driver_data *idd = port->ip_idd; - - /* Idle the IOC3 serial interface */ - writel(SSCR_RESET, &port->ip_serial_regs->sscr); - - /* Wait until any pending bus activity for this port has ceased */ - do { - sio_cr = readl(&idd->vma->sio_cr); - if (reset_loop_counter-- <= 0) { - printk(KERN_WARNING - "IOC3 unable to come out of reset" - " scr 0x%x\n", sio_cr); - return -1; - } - } while (!(sio_cr & SIO_CR_ARB_DIAG_IDLE) && - (((sio_cr &= SIO_CR_ARB_DIAG) == SIO_CR_ARB_DIAG_TXA) - || sio_cr == SIO_CR_ARB_DIAG_TXB - || sio_cr == SIO_CR_ARB_DIAG_RXA - || sio_cr == SIO_CR_ARB_DIAG_RXB)); - - /* Finish reset sequence */ - writel(0, &port->ip_serial_regs->sscr); - - /* Once RESET is done, reload cached tx_prod and rx_cons values - * and set rings to empty by making prod == cons - */ - port->ip_tx_prod = readl(&port->ip_serial_regs->stcir) & PROD_CONS_MASK; - writel(port->ip_tx_prod, &port->ip_serial_regs->stpir); - port->ip_rx_cons = readl(&port->ip_serial_regs->srpir) & PROD_CONS_MASK; - writel(port->ip_rx_cons | SRCIR_ARM, &port->ip_serial_regs->srcir); - - /* Disable interrupts for this 16550 */ - uart = port->ip_uart_regs; - writeb(0, &uart->iu_lcr); - writeb(0, &uart->iu_ier); - - /* Set the default baud */ - set_baud(port, port->ip_baud); - - /* Set line control to 8 bits no parity */ - writeb(UART_LCR_WLEN8 | 0, &uart->iu_lcr); - /* UART_LCR_STOP == 1 stop */ - - /* Enable the FIFOs */ - writeb(UART_FCR_ENABLE_FIFO, &uart->iu_fcr); - /* then reset 16550 FIFOs */ - writeb(UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT, - &uart->iu_fcr); - - /* Clear modem control register */ - writeb(0, &uart->iu_mcr); - - /* Clear deltas in modem status register */ - writel(0, &port->ip_serial_regs->shadow); - - /* Only do this once per port pair */ - if (port->ip_hooks == &hooks_array[0]) { - unsigned long ring_pci_addr; - uint32_t __iomem *sbbr_l, *sbbr_h; - - sbbr_l = &idd->vma->sbbr_l; - sbbr_h = &idd->vma->sbbr_h; - ring_pci_addr = (unsigned long __iomem)port->ip_dma_ringbuf; - DPRINT_CONFIG(("%s: ring_pci_addr 0x%p\n", - __func__, (void *)ring_pci_addr)); - - writel((unsigned int)((uint64_t) ring_pci_addr >> 32), sbbr_h); - writel((unsigned int)ring_pci_addr | BUF_SIZE_BIT, sbbr_l); - } - - /* Set the receive timeout value to 10 msec */ - writel(SRTR_HZ / 100, &port->ip_serial_regs->srtr); - - /* Set rx threshold, enable DMA */ - /* Set high water mark at 3/4 of full ring */ - port->ip_sscr = (ENTRIES_PER_RING * 3 / 4); - - /* uart experiences pauses at high baud rate reducing actual - * throughput by 10% or so unless we enable high speed polling - * XXX when this hardware bug is resolved we should revert to - * normal polling speed - */ - port->ip_sscr |= SSCR_HIGH_SPD; - - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - - /* Disable and clear all serial related interrupt bits */ - port->ip_card->ic_enable &= ~hooks->intr_clear; - ioc3_disable(port->ip_is, idd, hooks->intr_clear); - ioc3_ack(port->ip_is, idd, hooks->intr_clear); - return 0; -} - -/** - * enable_intrs - enable interrupts - * @port: port to enable - * @mask: mask to use - */ -static void enable_intrs(struct ioc3_port *port, uint32_t mask) -{ - if ((port->ip_card->ic_enable & mask) != mask) { - port->ip_card->ic_enable |= mask; - ioc3_enable(port->ip_is, port->ip_idd, mask); - } -} - -/** - * local_open - local open a port - * @port: port to open - */ -static inline int local_open(struct ioc3_port *port) -{ - int spiniter = 0; - - port->ip_flags = INPUT_ENABLE; - - /* Pause the DMA interface if necessary */ - if (port->ip_sscr & SSCR_DMA_EN) { - writel(port->ip_sscr | SSCR_DMA_PAUSE, - &port->ip_serial_regs->sscr); - while ((readl(&port->ip_serial_regs->sscr) - & SSCR_PAUSE_STATE) == 0) { - spiniter++; - if (spiniter > MAXITER) { - NOT_PROGRESS(); - return -1; - } - } - } - - /* Reset the input fifo. If the uart received chars while the port - * was closed and DMA is not enabled, the uart may have a bunch of - * chars hanging around in its rx fifo which will not be discarded - * by rclr in the upper layer. We must get rid of them here. - */ - writeb(UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR, - &port->ip_uart_regs->iu_fcr); - - writeb(UART_LCR_WLEN8, &port->ip_uart_regs->iu_lcr); - /* UART_LCR_STOP == 1 stop */ - - /* Re-enable DMA, set default threshold to intr whenever there is - * data available. - */ - port->ip_sscr &= ~SSCR_RX_THRESHOLD; - port->ip_sscr |= 1; /* default threshold */ - - /* Plug in the new sscr. This implicitly clears the DMA_PAUSE - * flag if it was set above - */ - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - port->ip_tx_lowat = 1; - return 0; -} - -/** - * set_rx_timeout - Set rx timeout and threshold values. - * @port: port to use - * @timeout: timeout value in ticks - */ -static inline int set_rx_timeout(struct ioc3_port *port, int timeout) -{ - int threshold; - - port->ip_rx_timeout = timeout; - - /* Timeout is in ticks. Let's figure out how many chars we - * can receive at the current baud rate in that interval - * and set the rx threshold to that amount. There are 4 chars - * per ring entry, so we'll divide the number of chars that will - * arrive in timeout by 4. - * So .... timeout * baud / 10 / HZ / 4, with HZ = 100. - */ - threshold = timeout * port->ip_baud / 4000; - if (threshold == 0) - threshold = 1; /* otherwise we'll intr all the time! */ - - if ((unsigned)threshold > (unsigned)SSCR_RX_THRESHOLD) - return 1; - - port->ip_sscr &= ~SSCR_RX_THRESHOLD; - port->ip_sscr |= threshold; - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - - /* Now set the rx timeout to the given value - * again timeout * SRTR_HZ / HZ - */ - timeout = timeout * SRTR_HZ / 100; - if (timeout > SRTR_CNT) - timeout = SRTR_CNT; - writel(timeout, &port->ip_serial_regs->srtr); - return 0; -} - -/** - * config_port - config the hardware - * @port: port to config - * @baud: baud rate for the port - * @byte_size: data size - * @stop_bits: number of stop bits - * @parenb: parity enable ? - * @parodd: odd parity ? - */ -static inline int -config_port(struct ioc3_port *port, - int baud, int byte_size, int stop_bits, int parenb, int parodd) -{ - char lcr, sizebits; - int spiniter = 0; - - DPRINT_CONFIG(("%s: line %d baud %d byte_size %d stop %d parenb %d " - "parodd %d\n", - __func__, ((struct uart_port *)port->ip_port)->line, - baud, byte_size, stop_bits, parenb, parodd)); - - if (set_baud(port, baud)) - return 1; - - switch (byte_size) { - case 5: - sizebits = UART_LCR_WLEN5; - break; - case 6: - sizebits = UART_LCR_WLEN6; - break; - case 7: - sizebits = UART_LCR_WLEN7; - break; - case 8: - sizebits = UART_LCR_WLEN8; - break; - default: - return 1; - } - - /* Pause the DMA interface if necessary */ - if (port->ip_sscr & SSCR_DMA_EN) { - writel(port->ip_sscr | SSCR_DMA_PAUSE, - &port->ip_serial_regs->sscr); - while ((readl(&port->ip_serial_regs->sscr) - & SSCR_PAUSE_STATE) == 0) { - spiniter++; - if (spiniter > MAXITER) - return -1; - } - } - - /* Clear relevant fields in lcr */ - lcr = readb(&port->ip_uart_regs->iu_lcr); - lcr &= ~(LCR_MASK_BITS_CHAR | UART_LCR_EPAR | - UART_LCR_PARITY | LCR_MASK_STOP_BITS); - - /* Set byte size in lcr */ - lcr |= sizebits; - - /* Set parity */ - if (parenb) { - lcr |= UART_LCR_PARITY; - if (!parodd) - lcr |= UART_LCR_EPAR; - } - - /* Set stop bits */ - if (stop_bits) - lcr |= UART_LCR_STOP /* 2 stop bits */ ; - - writeb(lcr, &port->ip_uart_regs->iu_lcr); - - /* Re-enable the DMA interface if necessary */ - if (port->ip_sscr & SSCR_DMA_EN) { - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - } - port->ip_baud = baud; - - /* When we get within this number of ring entries of filling the - * entire ring on tx, place an EXPLICIT intr to generate a lowat - * notification when output has drained. - */ - port->ip_tx_lowat = (TX_LOWAT_CHARS(baud) + 3) / 4; - if (port->ip_tx_lowat == 0) - port->ip_tx_lowat = 1; - - set_rx_timeout(port, 2); - return 0; -} - -/** - * do_write - Write bytes to the port. Returns the number of bytes - * actually written. Called from transmit_chars - * @port: port to use - * @buf: the stuff to write - * @len: how many bytes in 'buf' - */ -static inline int do_write(struct ioc3_port *port, char *buf, int len) -{ - int prod_ptr, cons_ptr, total = 0; - struct ring *outring; - struct ring_entry *entry; - struct port_hooks *hooks = port->ip_hooks; - - BUG_ON(!(len >= 0)); - - prod_ptr = port->ip_tx_prod; - cons_ptr = readl(&port->ip_serial_regs->stcir) & PROD_CONS_MASK; - outring = port->ip_outring; - - /* Maintain a 1-entry red-zone. The ring buffer is full when - * (cons - prod) % ring_size is 1. Rather than do this subtraction - * in the body of the loop, I'll do it now. - */ - cons_ptr = (cons_ptr - (int)sizeof(struct ring_entry)) & PROD_CONS_MASK; - - /* Stuff the bytes into the output */ - while ((prod_ptr != cons_ptr) && (len > 0)) { - int xx; - - /* Get 4 bytes (one ring entry) at a time */ - entry = (struct ring_entry *)((caddr_t) outring + prod_ptr); - - /* Invalidate all entries */ - entry->ring_allsc = 0; - - /* Copy in some bytes */ - for (xx = 0; (xx < 4) && (len > 0); xx++) { - entry->ring_data[xx] = *buf++; - entry->ring_sc[xx] = TXCB_VALID; - len--; - total++; - } - - /* If we are within some small threshold of filling up the - * entire ring buffer, we must place an EXPLICIT intr here - * to generate a lowat interrupt in case we subsequently - * really do fill up the ring and the caller goes to sleep. - * No need to place more than one though. - */ - if (!(port->ip_flags & LOWAT_WRITTEN) && - ((cons_ptr - prod_ptr) & PROD_CONS_MASK) - <= port->ip_tx_lowat * (int)sizeof(struct ring_entry)) { - port->ip_flags |= LOWAT_WRITTEN; - entry->ring_sc[0] |= TXCB_INT_WHEN_DONE; - } - - /* Go on to next entry */ - prod_ptr += sizeof(struct ring_entry); - prod_ptr &= PROD_CONS_MASK; - } - - /* If we sent something, start DMA if necessary */ - if (total > 0 && !(port->ip_sscr & SSCR_DMA_EN)) { - port->ip_sscr |= SSCR_DMA_EN; - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - } - - /* Store the new producer pointer. If tx is disabled, we stuff the - * data into the ring buffer, but we don't actually start tx. - */ - if (!uart_tx_stopped(port->ip_port)) { - writel(prod_ptr, &port->ip_serial_regs->stpir); - - /* If we are now transmitting, enable tx_mt interrupt so we - * can disable DMA if necessary when the tx finishes. - */ - if (total > 0) - enable_intrs(port, hooks->intr_tx_mt); - } - port->ip_tx_prod = prod_ptr; - - return total; -} - -/** - * disable_intrs - disable interrupts - * @port: port to enable - * @mask: mask to use - */ -static inline void disable_intrs(struct ioc3_port *port, uint32_t mask) -{ - if (port->ip_card->ic_enable & mask) { - ioc3_disable(port->ip_is, port->ip_idd, mask); - port->ip_card->ic_enable &= ~mask; - } -} - -/** - * set_notification - Modify event notification - * @port: port to use - * @mask: events mask - * @set_on: set ? - */ -static int set_notification(struct ioc3_port *port, int mask, int set_on) -{ - struct port_hooks *hooks = port->ip_hooks; - uint32_t intrbits, sscrbits; - - BUG_ON(!mask); - - intrbits = sscrbits = 0; - - if (mask & N_DATA_READY) - intrbits |= (hooks->intr_rx_timer | hooks->intr_rx_high); - if (mask & N_OUTPUT_LOWAT) - intrbits |= hooks->intr_tx_explicit; - if (mask & N_DDCD) { - intrbits |= hooks->intr_delta_dcd; - sscrbits |= SSCR_RX_RING_DCD; - } - if (mask & N_DCTS) - intrbits |= hooks->intr_delta_cts; - - if (set_on) { - enable_intrs(port, intrbits); - port->ip_notify |= mask; - port->ip_sscr |= sscrbits; - } else { - disable_intrs(port, intrbits); - port->ip_notify &= ~mask; - port->ip_sscr &= ~sscrbits; - } - - /* We require DMA if either DATA_READY or DDCD notification is - * currently requested. If neither of these is requested and - * there is currently no tx in progress, DMA may be disabled. - */ - if (port->ip_notify & (N_DATA_READY | N_DDCD)) - port->ip_sscr |= SSCR_DMA_EN; - else if (!(port->ip_card->ic_enable & hooks->intr_tx_mt)) - port->ip_sscr &= ~SSCR_DMA_EN; - - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - return 0; -} - -/** - * set_mcr - set the master control reg - * @the_port: port to use - * @mask1: mcr mask - * @mask2: shadow mask - */ -static inline int set_mcr(struct uart_port *the_port, - int mask1, int mask2) -{ - struct ioc3_port *port = get_ioc3_port(the_port); - uint32_t shadow; - int spiniter = 0; - char mcr; - - if (!port) - return -1; - - /* Pause the DMA interface if necessary */ - if (port->ip_sscr & SSCR_DMA_EN) { - writel(port->ip_sscr | SSCR_DMA_PAUSE, - &port->ip_serial_regs->sscr); - while ((readl(&port->ip_serial_regs->sscr) - & SSCR_PAUSE_STATE) == 0) { - spiniter++; - if (spiniter > MAXITER) - return -1; - } - } - shadow = readl(&port->ip_serial_regs->shadow); - mcr = (shadow & 0xff000000) >> 24; - - /* Set new value */ - mcr |= mask1; - shadow |= mask2; - writeb(mcr, &port->ip_uart_regs->iu_mcr); - writel(shadow, &port->ip_serial_regs->shadow); - - /* Re-enable the DMA interface if necessary */ - if (port->ip_sscr & SSCR_DMA_EN) { - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - } - return 0; -} - -/** - * ioc3_set_proto - set the protocol for the port - * @port: port to use - * @proto: protocol to use - */ -static int ioc3_set_proto(struct ioc3_port *port, int proto) -{ - struct port_hooks *hooks = port->ip_hooks; - - switch (proto) { - default: - case PROTO_RS232: - /* Clear the appropriate GIO pin */ - DPRINT_CONFIG(("%s: rs232\n", __func__)); - writel(0, (&port->ip_idd->vma->gppr[0] - + hooks->rs422_select_pin)); - break; - - case PROTO_RS422: - /* Set the appropriate GIO pin */ - DPRINT_CONFIG(("%s: rs422\n", __func__)); - writel(1, (&port->ip_idd->vma->gppr[0] - + hooks->rs422_select_pin)); - break; - } - return 0; -} - -/** - * transmit_chars - upper level write, called with the_port->lock - * @the_port: port to write - */ -static void transmit_chars(struct uart_port *the_port) -{ - int xmit_count, tail, head; - int result; - char *start; - struct tty_struct *tty; - struct ioc3_port *port = get_ioc3_port(the_port); - struct uart_state *state; - - if (!the_port) - return; - if (!port) - return; - - state = the_port->state; - tty = state->port.tty; - - if (uart_circ_empty(&state->xmit) || uart_tx_stopped(the_port)) { - /* Nothing to do or hw stopped */ - set_notification(port, N_ALL_OUTPUT, 0); - return; - } - - head = state->xmit.head; - tail = state->xmit.tail; - start = (char *)&state->xmit.buf[tail]; - - /* write out all the data or until the end of the buffer */ - xmit_count = (head < tail) ? (UART_XMIT_SIZE - tail) : (head - tail); - if (xmit_count > 0) { - result = do_write(port, start, xmit_count); - if (result > 0) { - /* booking */ - xmit_count -= result; - the_port->icount.tx += result; - /* advance the pointers */ - tail += result; - tail &= UART_XMIT_SIZE - 1; - state->xmit.tail = tail; - start = (char *)&state->xmit.buf[tail]; - } - } - if (uart_circ_chars_pending(&state->xmit) < WAKEUP_CHARS) - uart_write_wakeup(the_port); - - if (uart_circ_empty(&state->xmit)) { - set_notification(port, N_OUTPUT_LOWAT, 0); - } else { - set_notification(port, N_OUTPUT_LOWAT, 1); - } -} - -/** - * ioc3_change_speed - change the speed of the port - * @the_port: port to change - * @new_termios: new termios settings - * @old_termios: old termios settings - */ -static void -ioc3_change_speed(struct uart_port *the_port, - struct ktermios *new_termios, struct ktermios *old_termios) -{ - struct ioc3_port *port = get_ioc3_port(the_port); - unsigned int cflag, iflag; - int baud; - int new_parity = 0, new_parity_enable = 0, new_stop = 0, new_data = 8; - struct uart_state *state = the_port->state; - - cflag = new_termios->c_cflag; - iflag = new_termios->c_iflag; - - switch (cflag & CSIZE) { - case CS5: - new_data = 5; - break; - case CS6: - new_data = 6; - break; - case CS7: - new_data = 7; - break; - case CS8: - new_data = 8; - break; - default: - /* cuz we always need a default ... */ - new_data = 5; - break; - } - if (cflag & CSTOPB) { - new_stop = 1; - } - if (cflag & PARENB) { - new_parity_enable = 1; - if (cflag & PARODD) - new_parity = 1; - } - baud = uart_get_baud_rate(the_port, new_termios, old_termios, - MIN_BAUD_SUPPORTED, MAX_BAUD_SUPPORTED); - DPRINT_CONFIG(("%s: returned baud %d for line %d\n", __func__, baud, - the_port->line)); - - if (!the_port->fifosize) - the_port->fifosize = FIFO_SIZE; - uart_update_timeout(the_port, cflag, baud); - - the_port->ignore_status_mask = N_ALL_INPUT; - - state->port.tty->low_latency = 1; - - if (iflag & IGNPAR) - the_port->ignore_status_mask &= ~(N_PARITY_ERROR - | N_FRAMING_ERROR); - if (iflag & IGNBRK) { - the_port->ignore_status_mask &= ~N_BREAK; - if (iflag & IGNPAR) - the_port->ignore_status_mask &= ~N_OVERRUN_ERROR; - } - if (!(cflag & CREAD)) { - /* ignore everything */ - the_port->ignore_status_mask &= ~N_DATA_READY; - } - - if (cflag & CRTSCTS) { - /* enable hardware flow control */ - port->ip_sscr |= SSCR_HFC_EN; - } - else { - /* disable hardware flow control */ - port->ip_sscr &= ~SSCR_HFC_EN; - } - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - - /* Set the configuration and proper notification call */ - DPRINT_CONFIG(("%s : port 0x%p line %d cflag 0%o " - "config_port(baud %d data %d stop %d penable %d " - " parity %d), notification 0x%x\n", - __func__, (void *)port, the_port->line, cflag, baud, - new_data, new_stop, new_parity_enable, new_parity, - the_port->ignore_status_mask)); - - if ((config_port(port, baud, /* baud */ - new_data, /* byte size */ - new_stop, /* stop bits */ - new_parity_enable, /* set parity */ - new_parity)) >= 0) { /* parity 1==odd */ - set_notification(port, the_port->ignore_status_mask, 1); - } -} - -/** - * ic3_startup_local - Start up the serial port - returns >= 0 if no errors - * @the_port: Port to operate on - */ -static inline int ic3_startup_local(struct uart_port *the_port) -{ - struct ioc3_port *port; - - if (!the_port) { - NOT_PROGRESS(); - return -1; - } - - port = get_ioc3_port(the_port); - if (!port) { - NOT_PROGRESS(); - return -1; - } - - local_open(port); - - /* set the protocol */ - ioc3_set_proto(port, IS_RS232(the_port->line) ? PROTO_RS232 : - PROTO_RS422); - return 0; -} - -/* - * ioc3_cb_output_lowat - called when the output low water mark is hit - * @port: port to output - */ -static void ioc3_cb_output_lowat(struct ioc3_port *port) -{ - unsigned long pflags; - - /* the_port->lock is set on the call here */ - if (port->ip_port) { - spin_lock_irqsave(&port->ip_port->lock, pflags); - transmit_chars(port->ip_port); - spin_unlock_irqrestore(&port->ip_port->lock, pflags); - } -} - -/* - * ioc3_cb_post_ncs - called for some basic errors - * @port: port to use - * @ncs: event - */ -static void ioc3_cb_post_ncs(struct uart_port *the_port, int ncs) -{ - struct uart_icount *icount; - - icount = &the_port->icount; - - if (ncs & NCS_BREAK) - icount->brk++; - if (ncs & NCS_FRAMING) - icount->frame++; - if (ncs & NCS_OVERRUN) - icount->overrun++; - if (ncs & NCS_PARITY) - icount->parity++; -} - -/** - * do_read - Read in bytes from the port. Return the number of bytes - * actually read. - * @the_port: port to use - * @buf: place to put the stuff we read - * @len: how big 'buf' is - */ - -static inline int do_read(struct uart_port *the_port, char *buf, int len) -{ - int prod_ptr, cons_ptr, total; - struct ioc3_port *port = get_ioc3_port(the_port); - struct ring *inring; - struct ring_entry *entry; - struct port_hooks *hooks = port->ip_hooks; - int byte_num; - char *sc; - int loop_counter; - - BUG_ON(!(len >= 0)); - BUG_ON(!port); - - /* There is a nasty timing issue in the IOC3. When the rx_timer - * expires or the rx_high condition arises, we take an interrupt. - * At some point while servicing the interrupt, we read bytes from - * the ring buffer and re-arm the rx_timer. However the rx_timer is - * not started until the first byte is received *after* it is armed, - * and any bytes pending in the rx construction buffers are not drained - * to memory until either there are 4 bytes available or the rx_timer - * expires. This leads to a potential situation where data is left - * in the construction buffers forever - 1 to 3 bytes were received - * after the interrupt was generated but before the rx_timer was - * re-armed. At that point as long as no subsequent bytes are received - * the timer will never be started and the bytes will remain in the - * construction buffer forever. The solution is to execute a DRAIN - * command after rearming the timer. This way any bytes received before - * the DRAIN will be drained to memory, and any bytes received after - * the DRAIN will start the TIMER and be drained when it expires. - * Luckily, this only needs to be done when the DMA buffer is empty - * since there is no requirement that this function return all - * available data as long as it returns some. - */ - /* Re-arm the timer */ - - writel(port->ip_rx_cons | SRCIR_ARM, &port->ip_serial_regs->srcir); - - prod_ptr = readl(&port->ip_serial_regs->srpir) & PROD_CONS_MASK; - cons_ptr = port->ip_rx_cons; - - if (prod_ptr == cons_ptr) { - int reset_dma = 0; - - /* Input buffer appears empty, do a flush. */ - - /* DMA must be enabled for this to work. */ - if (!(port->ip_sscr & SSCR_DMA_EN)) { - port->ip_sscr |= SSCR_DMA_EN; - reset_dma = 1; - } - - /* Potential race condition: we must reload the srpir after - * issuing the drain command, otherwise we could think the rx - * buffer is empty, then take a very long interrupt, and when - * we come back it's full and we wait forever for the drain to - * complete. - */ - writel(port->ip_sscr | SSCR_RX_DRAIN, - &port->ip_serial_regs->sscr); - prod_ptr = readl(&port->ip_serial_regs->srpir) & PROD_CONS_MASK; - - /* We must not wait for the DRAIN to complete unless there are - * at least 8 bytes (2 ring entries) available to receive the - * data otherwise the DRAIN will never complete and we'll - * deadlock here. - * In fact, to make things easier, I'll just ignore the flush if - * there is any data at all now available. - */ - if (prod_ptr == cons_ptr) { - loop_counter = 0; - while (readl(&port->ip_serial_regs->sscr) & - SSCR_RX_DRAIN) { - loop_counter++; - if (loop_counter > MAXITER) - return -1; - } - - /* SIGH. We have to reload the prod_ptr *again* since - * the drain may have caused it to change - */ - prod_ptr = readl(&port->ip_serial_regs->srpir) - & PROD_CONS_MASK; - } - if (reset_dma) { - port->ip_sscr &= ~SSCR_DMA_EN; - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - } - } - inring = port->ip_inring; - port->ip_flags &= ~READ_ABORTED; - - total = 0; - loop_counter = 0xfffff; /* to avoid hangs */ - - /* Grab bytes from the hardware */ - while ((prod_ptr != cons_ptr) && (len > 0)) { - entry = (struct ring_entry *)((caddr_t) inring + cons_ptr); - - if (loop_counter-- <= 0) { - printk(KERN_WARNING "IOC3 serial: " - "possible hang condition/" - "port stuck on read (line %d).\n", - the_port->line); - break; - } - - /* According to the producer pointer, this ring entry - * must contain some data. But if the PIO happened faster - * than the DMA, the data may not be available yet, so let's - * wait until it arrives. - */ - if ((entry->ring_allsc & RING_ANY_VALID) == 0) { - /* Indicate the read is aborted so we don't disable - * the interrupt thinking that the consumer is - * congested. - */ - port->ip_flags |= READ_ABORTED; - len = 0; - break; - } - - /* Load the bytes/status out of the ring entry */ - for (byte_num = 0; byte_num < 4 && len > 0; byte_num++) { - sc = &(entry->ring_sc[byte_num]); - - /* Check for change in modem state or overrun */ - if ((*sc & RXSB_MODEM_VALID) - && (port->ip_notify & N_DDCD)) { - /* Notify upper layer if DCD dropped */ - if ((port->ip_flags & DCD_ON) - && !(*sc & RXSB_DCD)) { - /* If we have already copied some data, - * return it. We'll pick up the carrier - * drop on the next pass. That way we - * don't throw away the data that has - * already been copied back to - * the caller's buffer. - */ - if (total > 0) { - len = 0; - break; - } - port->ip_flags &= ~DCD_ON; - - /* Turn off this notification so the - * carrier drop protocol won't see it - * again when it does a read. - */ - *sc &= ~RXSB_MODEM_VALID; - - /* To keep things consistent, we need - * to update the consumer pointer so - * the next reader won't come in and - * try to read the same ring entries - * again. This must be done here before - * the dcd change. - */ - - if ((entry->ring_allsc & RING_ANY_VALID) - == 0) { - cons_ptr += (int)sizeof - (struct ring_entry); - cons_ptr &= PROD_CONS_MASK; - } - writel(cons_ptr, - &port->ip_serial_regs->srcir); - port->ip_rx_cons = cons_ptr; - - /* Notify upper layer of carrier drop */ - if ((port->ip_notify & N_DDCD) - && port->ip_port) { - uart_handle_dcd_change - (port->ip_port, 0); - wake_up_interruptible - (&the_port->state-> - port.delta_msr_wait); - } - - /* If we had any data to return, we - * would have returned it above. - */ - return 0; - } - } - if (*sc & RXSB_MODEM_VALID) { - /* Notify that an input overrun occurred */ - if ((*sc & RXSB_OVERRUN) - && (port->ip_notify & N_OVERRUN_ERROR)) { - ioc3_cb_post_ncs(the_port, NCS_OVERRUN); - } - /* Don't look at this byte again */ - *sc &= ~RXSB_MODEM_VALID; - } - - /* Check for valid data or RX errors */ - if ((*sc & RXSB_DATA_VALID) && - ((*sc & (RXSB_PAR_ERR - | RXSB_FRAME_ERR | RXSB_BREAK)) - && (port->ip_notify & (N_PARITY_ERROR - | N_FRAMING_ERROR - | N_BREAK)))) { - /* There is an error condition on the next byte. - * If we have already transferred some bytes, - * we'll stop here. Otherwise if this is the - * first byte to be read, we'll just transfer - * it alone after notifying the - * upper layer of its status. - */ - if (total > 0) { - len = 0; - break; - } else { - if ((*sc & RXSB_PAR_ERR) && - (port-> - ip_notify & N_PARITY_ERROR)) { - ioc3_cb_post_ncs(the_port, - NCS_PARITY); - } - if ((*sc & RXSB_FRAME_ERR) && - (port-> - ip_notify & N_FRAMING_ERROR)) { - ioc3_cb_post_ncs(the_port, - NCS_FRAMING); - } - if ((*sc & RXSB_BREAK) - && (port->ip_notify & N_BREAK)) { - ioc3_cb_post_ncs - (the_port, NCS_BREAK); - } - len = 1; - } - } - if (*sc & RXSB_DATA_VALID) { - *sc &= ~RXSB_DATA_VALID; - *buf = entry->ring_data[byte_num]; - buf++; - len--; - total++; - } - } - - /* If we used up this entry entirely, go on to the next one, - * otherwise we must have run out of buffer space, so - * leave the consumer pointer here for the next read in case - * there are still unread bytes in this entry. - */ - if ((entry->ring_allsc & RING_ANY_VALID) == 0) { - cons_ptr += (int)sizeof(struct ring_entry); - cons_ptr &= PROD_CONS_MASK; - } - } - - /* Update consumer pointer and re-arm rx timer interrupt */ - writel(cons_ptr, &port->ip_serial_regs->srcir); - port->ip_rx_cons = cons_ptr; - - /* If we have now dipped below the rx high water mark and we have - * rx_high interrupt turned off, we can now turn it back on again. - */ - if ((port->ip_flags & INPUT_HIGH) && (((prod_ptr - cons_ptr) - & PROD_CONS_MASK) < - ((port-> - ip_sscr & - SSCR_RX_THRESHOLD) - << PROD_CONS_PTR_OFF))) { - port->ip_flags &= ~INPUT_HIGH; - enable_intrs(port, hooks->intr_rx_high); - } - return total; -} - -/** - * receive_chars - upper level read. - * @the_port: port to read from - */ -static int receive_chars(struct uart_port *the_port) -{ - struct tty_struct *tty; - unsigned char ch[MAX_CHARS]; - int read_count = 0, read_room, flip = 0; - struct uart_state *state = the_port->state; - struct ioc3_port *port = get_ioc3_port(the_port); - unsigned long pflags; - - /* Make sure all the pointers are "good" ones */ - if (!state) - return 0; - if (!state->port.tty) - return 0; - - if (!(port->ip_flags & INPUT_ENABLE)) - return 0; - - spin_lock_irqsave(&the_port->lock, pflags); - tty = state->port.tty; - - read_count = do_read(the_port, ch, MAX_CHARS); - if (read_count > 0) { - flip = 1; - read_room = tty_insert_flip_string(tty, ch, read_count); - the_port->icount.rx += read_count; - } - spin_unlock_irqrestore(&the_port->lock, pflags); - - if (flip) - tty_flip_buffer_push(tty); - - return read_count; -} - -/** - * ioc3uart_intr_one - lowest level (per port) interrupt handler. - * @is : submodule - * @idd: driver data - * @pending: interrupts to handle - */ - -static int inline -ioc3uart_intr_one(struct ioc3_submodule *is, - struct ioc3_driver_data *idd, - unsigned int pending) -{ - int port_num = GET_PORT_FROM_SIO_IR(pending); - struct port_hooks *hooks; - unsigned int rx_high_rd_aborted = 0; - unsigned long flags; - struct uart_port *the_port; - struct ioc3_port *port; - int loop_counter; - struct ioc3_card *card_ptr; - unsigned int sio_ir; - - card_ptr = idd->data[is->id]; - port = card_ptr->ic_port[port_num].icp_port; - hooks = port->ip_hooks; - - /* Possible race condition here: The tx_mt interrupt bit may be - * cleared without the intervention of the interrupt handler, - * e.g. by a write. If the top level interrupt handler reads a - * tx_mt, then some other processor does a write, starting up - * output, then we come in here, see the tx_mt and stop DMA, the - * output started by the other processor will hang. Thus we can - * only rely on tx_mt being legitimate if it is read while the - * port lock is held. Therefore this bit must be ignored in the - * passed in interrupt mask which was read by the top level - * interrupt handler since the port lock was not held at the time - * it was read. We can only rely on this bit being accurate if it - * is read while the port lock is held. So we'll clear it for now, - * and reload it later once we have the port lock. - */ - - sio_ir = pending & ~(hooks->intr_tx_mt); - spin_lock_irqsave(&port->ip_lock, flags); - - loop_counter = MAXITER; /* to avoid hangs */ - - do { - uint32_t shadow; - - if (loop_counter-- <= 0) { - printk(KERN_WARNING "IOC3 serial: " - "possible hang condition/" - "port stuck on interrupt (line %d).\n", - ((struct uart_port *)port->ip_port)->line); - break; - } - /* Handle a DCD change */ - if (sio_ir & hooks->intr_delta_dcd) { - ioc3_ack(is, idd, hooks->intr_delta_dcd); - shadow = readl(&port->ip_serial_regs->shadow); - - if ((port->ip_notify & N_DDCD) - && (shadow & SHADOW_DCD) - && (port->ip_port)) { - the_port = port->ip_port; - uart_handle_dcd_change(the_port, - shadow & SHADOW_DCD); - wake_up_interruptible - (&the_port->state->port.delta_msr_wait); - } else if ((port->ip_notify & N_DDCD) - && !(shadow & SHADOW_DCD)) { - /* Flag delta DCD/no DCD */ - uart_handle_dcd_change(port->ip_port, - shadow & SHADOW_DCD); - port->ip_flags |= DCD_ON; - } - } - - /* Handle a CTS change */ - if (sio_ir & hooks->intr_delta_cts) { - ioc3_ack(is, idd, hooks->intr_delta_cts); - shadow = readl(&port->ip_serial_regs->shadow); - - if ((port->ip_notify & N_DCTS) && (port->ip_port)) { - the_port = port->ip_port; - uart_handle_cts_change(the_port, shadow - & SHADOW_CTS); - wake_up_interruptible - (&the_port->state->port.delta_msr_wait); - } - } - - /* rx timeout interrupt. Must be some data available. Put this - * before the check for rx_high since servicing this condition - * may cause that condition to clear. - */ - if (sio_ir & hooks->intr_rx_timer) { - ioc3_ack(is, idd, hooks->intr_rx_timer); - if ((port->ip_notify & N_DATA_READY) - && (port->ip_port)) { - receive_chars(port->ip_port); - } - } - - /* rx high interrupt. Must be after rx_timer. */ - else if (sio_ir & hooks->intr_rx_high) { - /* Data available, notify upper layer */ - if ((port->ip_notify & N_DATA_READY) && port->ip_port) { - receive_chars(port->ip_port); - } - - /* We can't ACK this interrupt. If receive_chars didn't - * cause the condition to clear, we'll have to disable - * the interrupt until the data is drained. - * If the read was aborted, don't disable the interrupt - * as this may cause us to hang indefinitely. An - * aborted read generally means that this interrupt - * hasn't been delivered to the cpu yet anyway, even - * though we see it as asserted when we read the sio_ir. - */ - if ((sio_ir = PENDING(card_ptr, idd)) - & hooks->intr_rx_high) { - if (port->ip_flags & READ_ABORTED) { - rx_high_rd_aborted++; - } - else { - card_ptr->ic_enable &= ~hooks->intr_rx_high; - port->ip_flags |= INPUT_HIGH; - } - } - } - - /* We got a low water interrupt: notify upper layer to - * send more data. Must come before tx_mt since servicing - * this condition may cause that condition to clear. - */ - if (sio_ir & hooks->intr_tx_explicit) { - port->ip_flags &= ~LOWAT_WRITTEN; - ioc3_ack(is, idd, hooks->intr_tx_explicit); - if (port->ip_notify & N_OUTPUT_LOWAT) - ioc3_cb_output_lowat(port); - } - - /* Handle tx_mt. Must come after tx_explicit. */ - else if (sio_ir & hooks->intr_tx_mt) { - /* If we are expecting a lowat notification - * and we get to this point it probably means that for - * some reason the tx_explicit didn't work as expected - * (that can legitimately happen if the output buffer is - * filled up in just the right way). - * So send the notification now. - */ - if (port->ip_notify & N_OUTPUT_LOWAT) { - ioc3_cb_output_lowat(port); - - /* We need to reload the sio_ir since the lowat - * call may have caused another write to occur, - * clearing the tx_mt condition. - */ - sio_ir = PENDING(card_ptr, idd); - } - - /* If the tx_mt condition still persists even after the - * lowat call, we've got some work to do. - */ - if (sio_ir & hooks->intr_tx_mt) { - /* If we are not currently expecting DMA input, - * and the transmitter has just gone idle, - * there is no longer any reason for DMA, so - * disable it. - */ - if (!(port->ip_notify - & (N_DATA_READY | N_DDCD))) { - BUG_ON(!(port->ip_sscr - & SSCR_DMA_EN)); - port->ip_sscr &= ~SSCR_DMA_EN; - writel(port->ip_sscr, - &port->ip_serial_regs->sscr); - } - /* Prevent infinite tx_mt interrupt */ - card_ptr->ic_enable &= ~hooks->intr_tx_mt; - } - } - sio_ir = PENDING(card_ptr, idd); - - /* if the read was aborted and only hooks->intr_rx_high, - * clear hooks->intr_rx_high, so we do not loop forever. - */ - - if (rx_high_rd_aborted && (sio_ir == hooks->intr_rx_high)) { - sio_ir &= ~hooks->intr_rx_high; - } - } while (sio_ir & hooks->intr_all); - - spin_unlock_irqrestore(&port->ip_lock, flags); - ioc3_enable(is, idd, card_ptr->ic_enable); - return 0; -} - -/** - * ioc3uart_intr - field all serial interrupts - * @is : submodule - * @idd: driver data - * @pending: interrupts to handle - * - */ - -static int ioc3uart_intr(struct ioc3_submodule *is, - struct ioc3_driver_data *idd, - unsigned int pending) -{ - int ret = 0; - - /* - * The upper level interrupt handler sends interrupts for both ports - * here. So we need to call for each port with its interrupts. - */ - - if (pending & SIO_IR_SA) - ret |= ioc3uart_intr_one(is, idd, pending & SIO_IR_SA); - if (pending & SIO_IR_SB) - ret |= ioc3uart_intr_one(is, idd, pending & SIO_IR_SB); - - return ret; -} - -/** - * ic3_type - * @port: Port to operate with (we ignore since we only have one port) - * - */ -static const char *ic3_type(struct uart_port *the_port) -{ - if (IS_RS232(the_port->line)) - return "SGI IOC3 Serial [rs232]"; - else - return "SGI IOC3 Serial [rs422]"; -} - -/** - * ic3_tx_empty - Is the transmitter empty? - * @port: Port to operate on - * - */ -static unsigned int ic3_tx_empty(struct uart_port *the_port) -{ - unsigned int ret = 0; - struct ioc3_port *port = get_ioc3_port(the_port); - - if (readl(&port->ip_serial_regs->shadow) & SHADOW_TEMT) - ret = TIOCSER_TEMT; - return ret; -} - -/** - * ic3_stop_tx - stop the transmitter - * @port: Port to operate on - * - */ -static void ic3_stop_tx(struct uart_port *the_port) -{ - struct ioc3_port *port = get_ioc3_port(the_port); - - if (port) - set_notification(port, N_OUTPUT_LOWAT, 0); -} - -/** - * ic3_stop_rx - stop the receiver - * @port: Port to operate on - * - */ -static void ic3_stop_rx(struct uart_port *the_port) -{ - struct ioc3_port *port = get_ioc3_port(the_port); - - if (port) - port->ip_flags &= ~INPUT_ENABLE; -} - -/** - * null_void_function - * @port: Port to operate on - * - */ -static void null_void_function(struct uart_port *the_port) -{ -} - -/** - * ic3_shutdown - shut down the port - free irq and disable - * @port: port to shut down - * - */ -static void ic3_shutdown(struct uart_port *the_port) -{ - unsigned long port_flags; - struct ioc3_port *port; - struct uart_state *state; - - port = get_ioc3_port(the_port); - if (!port) - return; - - state = the_port->state; - wake_up_interruptible(&state->port.delta_msr_wait); - - spin_lock_irqsave(&the_port->lock, port_flags); - set_notification(port, N_ALL, 0); - spin_unlock_irqrestore(&the_port->lock, port_flags); -} - -/** - * ic3_set_mctrl - set control lines (dtr, rts, etc) - * @port: Port to operate on - * @mctrl: Lines to set/unset - * - */ -static void ic3_set_mctrl(struct uart_port *the_port, unsigned int mctrl) -{ - unsigned char mcr = 0; - - if (mctrl & TIOCM_RTS) - mcr |= UART_MCR_RTS; - if (mctrl & TIOCM_DTR) - mcr |= UART_MCR_DTR; - if (mctrl & TIOCM_OUT1) - mcr |= UART_MCR_OUT1; - if (mctrl & TIOCM_OUT2) - mcr |= UART_MCR_OUT2; - if (mctrl & TIOCM_LOOP) - mcr |= UART_MCR_LOOP; - - set_mcr(the_port, mcr, SHADOW_DTR); -} - -/** - * ic3_get_mctrl - get control line info - * @port: port to operate on - * - */ -static unsigned int ic3_get_mctrl(struct uart_port *the_port) -{ - struct ioc3_port *port = get_ioc3_port(the_port); - uint32_t shadow; - unsigned int ret = 0; - - if (!port) - return 0; - - shadow = readl(&port->ip_serial_regs->shadow); - if (shadow & SHADOW_DCD) - ret |= TIOCM_CD; - if (shadow & SHADOW_DR) - ret |= TIOCM_DSR; - if (shadow & SHADOW_CTS) - ret |= TIOCM_CTS; - return ret; -} - -/** - * ic3_start_tx - Start transmitter. Called with the_port->lock - * @port: Port to operate on - * - */ -static void ic3_start_tx(struct uart_port *the_port) -{ - struct ioc3_port *port = get_ioc3_port(the_port); - - if (port) { - set_notification(port, N_OUTPUT_LOWAT, 1); - enable_intrs(port, port->ip_hooks->intr_tx_mt); - } -} - -/** - * ic3_break_ctl - handle breaks - * @port: Port to operate on - * @break_state: Break state - * - */ -static void ic3_break_ctl(struct uart_port *the_port, int break_state) -{ -} - -/** - * ic3_startup - Start up the serial port - always return 0 (We're always on) - * @port: Port to operate on - * - */ -static int ic3_startup(struct uart_port *the_port) -{ - int retval; - struct ioc3_port *port; - struct ioc3_card *card_ptr; - unsigned long port_flags; - - if (!the_port) { - NOT_PROGRESS(); - return -ENODEV; - } - port = get_ioc3_port(the_port); - if (!port) { - NOT_PROGRESS(); - return -ENODEV; - } - card_ptr = port->ip_card; - port->ip_port = the_port; - - if (!card_ptr) { - NOT_PROGRESS(); - return -ENODEV; - } - - /* Start up the serial port */ - spin_lock_irqsave(&the_port->lock, port_flags); - retval = ic3_startup_local(the_port); - spin_unlock_irqrestore(&the_port->lock, port_flags); - return retval; -} - -/** - * ic3_set_termios - set termios stuff - * @port: port to operate on - * @termios: New settings - * @termios: Old - * - */ -static void -ic3_set_termios(struct uart_port *the_port, - struct ktermios *termios, struct ktermios *old_termios) -{ - unsigned long port_flags; - - spin_lock_irqsave(&the_port->lock, port_flags); - ioc3_change_speed(the_port, termios, old_termios); - spin_unlock_irqrestore(&the_port->lock, port_flags); -} - -/** - * ic3_request_port - allocate resources for port - no op.... - * @port: port to operate on - * - */ -static int ic3_request_port(struct uart_port *port) -{ - return 0; -} - -/* Associate the uart functions above - given to serial core */ -static struct uart_ops ioc3_ops = { - .tx_empty = ic3_tx_empty, - .set_mctrl = ic3_set_mctrl, - .get_mctrl = ic3_get_mctrl, - .stop_tx = ic3_stop_tx, - .start_tx = ic3_start_tx, - .stop_rx = ic3_stop_rx, - .enable_ms = null_void_function, - .break_ctl = ic3_break_ctl, - .startup = ic3_startup, - .shutdown = ic3_shutdown, - .set_termios = ic3_set_termios, - .type = ic3_type, - .release_port = null_void_function, - .request_port = ic3_request_port, -}; - -/* - * Boot-time initialization code - */ - -static struct uart_driver ioc3_uart = { - .owner = THIS_MODULE, - .driver_name = "ioc3_serial", - .dev_name = DEVICE_NAME, - .major = DEVICE_MAJOR, - .minor = DEVICE_MINOR, - .nr = MAX_LOGICAL_PORTS -}; - -/** - * ioc3_serial_core_attach - register with serial core - * This is done during pci probing - * @is: submodule struct for this - * @idd: handle for this card - */ -static inline int ioc3_serial_core_attach( struct ioc3_submodule *is, - struct ioc3_driver_data *idd) -{ - struct ioc3_port *port; - struct uart_port *the_port; - struct ioc3_card *card_ptr = idd->data[is->id]; - int ii, phys_port; - struct pci_dev *pdev = idd->pdev; - - DPRINT_CONFIG(("%s: attach pdev 0x%p - card_ptr 0x%p\n", - __func__, pdev, (void *)card_ptr)); - - if (!card_ptr) - return -ENODEV; - - /* once around for each logical port on this card */ - for (ii = 0; ii < LOGICAL_PORTS_PER_CARD; ii++) { - phys_port = GET_PHYSICAL_PORT(ii); - the_port = &card_ptr->ic_port[phys_port]. - icp_uart_port[GET_LOGICAL_PORT(ii)]; - port = card_ptr->ic_port[phys_port].icp_port; - port->ip_port = the_port; - - DPRINT_CONFIG(("%s: attach the_port 0x%p / port 0x%p [%d/%d]\n", - __func__, (void *)the_port, (void *)port, - phys_port, ii)); - - /* membase, iobase and mapbase just need to be non-0 */ - the_port->membase = (unsigned char __iomem *)1; - the_port->iobase = (pdev->bus->number << 16) | ii; - the_port->line = (Num_of_ioc3_cards << 2) | ii; - the_port->mapbase = 1; - the_port->type = PORT_16550A; - the_port->fifosize = FIFO_SIZE; - the_port->ops = &ioc3_ops; - the_port->irq = idd->irq_io; - the_port->dev = &pdev->dev; - - if (uart_add_one_port(&ioc3_uart, the_port) < 0) { - printk(KERN_WARNING - "%s: unable to add port %d bus %d\n", - __func__, the_port->line, pdev->bus->number); - } else { - DPRINT_CONFIG(("IOC3 serial port %d irq %d bus %d\n", - the_port->line, the_port->irq, pdev->bus->number)); - } - - /* all ports are rs232 for now */ - if (IS_PHYSICAL_PORT(ii)) - ioc3_set_proto(port, PROTO_RS232); - } - return 0; -} - -/** - * ioc3uart_remove - register detach function - * @is: submodule struct for this submodule - * @idd: ioc3 driver data for this submodule - */ - -static int ioc3uart_remove(struct ioc3_submodule *is, - struct ioc3_driver_data *idd) -{ - struct ioc3_card *card_ptr = idd->data[is->id]; - struct uart_port *the_port; - struct ioc3_port *port; - int ii; - - if (card_ptr) { - for (ii = 0; ii < LOGICAL_PORTS_PER_CARD; ii++) { - the_port = &card_ptr->ic_port[GET_PHYSICAL_PORT(ii)]. - icp_uart_port[GET_LOGICAL_PORT(ii)]; - if (the_port) - uart_remove_one_port(&ioc3_uart, the_port); - port = card_ptr->ic_port[GET_PHYSICAL_PORT(ii)].icp_port; - if (port && IS_PHYSICAL_PORT(ii) - && (GET_PHYSICAL_PORT(ii) == 0)) { - pci_free_consistent(port->ip_idd->pdev, - TOTAL_RING_BUF_SIZE, - (void *)port->ip_cpu_ringbuf, - port->ip_dma_ringbuf); - kfree(port); - card_ptr->ic_port[GET_PHYSICAL_PORT(ii)]. - icp_port = NULL; - } - } - kfree(card_ptr); - idd->data[is->id] = NULL; - } - return 0; -} - -/** - * ioc3uart_probe - card probe function called from shim driver - * @is: submodule struct for this submodule - * @idd: ioc3 driver data for this card - */ - -static int __devinit -ioc3uart_probe(struct ioc3_submodule *is, struct ioc3_driver_data *idd) -{ - struct pci_dev *pdev = idd->pdev; - struct ioc3_card *card_ptr; - int ret = 0; - struct ioc3_port *port; - struct ioc3_port *ports[PORTS_PER_CARD]; - int phys_port; - int cnt; - - DPRINT_CONFIG(("%s (0x%p, 0x%p)\n", __func__, is, idd)); - - card_ptr = kzalloc(sizeof(struct ioc3_card), GFP_KERNEL); - if (!card_ptr) { - printk(KERN_WARNING "ioc3_attach_one" - ": unable to get memory for the IOC3\n"); - return -ENOMEM; - } - idd->data[is->id] = card_ptr; - Submodule_slot = is->id; - - writel(((UARTA_BASE >> 3) << SIO_CR_SER_A_BASE_SHIFT) | - ((UARTB_BASE >> 3) << SIO_CR_SER_B_BASE_SHIFT) | - (0xf << SIO_CR_CMD_PULSE_SHIFT), &idd->vma->sio_cr); - - pci_write_config_dword(pdev, PCI_LAT, 0xff00); - - /* Enable serial port mode select generic PIO pins as outputs */ - ioc3_gpcr_set(idd, GPCR_UARTA_MODESEL | GPCR_UARTB_MODESEL); - - /* Create port structures for each port */ - for (phys_port = 0; phys_port < PORTS_PER_CARD; phys_port++) { - port = kzalloc(sizeof(struct ioc3_port), GFP_KERNEL); - if (!port) { - printk(KERN_WARNING - "IOC3 serial memory not available for port\n"); - ret = -ENOMEM; - goto out4; - } - spin_lock_init(&port->ip_lock); - - /* we need to remember the previous ones, to point back to - * them farther down - setting up the ring buffers. - */ - ports[phys_port] = port; - - /* init to something useful */ - card_ptr->ic_port[phys_port].icp_port = port; - port->ip_is = is; - port->ip_idd = idd; - port->ip_baud = 9600; - port->ip_card = card_ptr; - port->ip_hooks = &hooks_array[phys_port]; - - /* Setup each port */ - if (phys_port == 0) { - port->ip_serial_regs = &idd->vma->port_a; - port->ip_uart_regs = &idd->vma->sregs.uarta; - - DPRINT_CONFIG(("%s : Port A ip_serial_regs 0x%p " - "ip_uart_regs 0x%p\n", - __func__, - (void *)port->ip_serial_regs, - (void *)port->ip_uart_regs)); - - /* setup ring buffers */ - port->ip_cpu_ringbuf = pci_alloc_consistent(pdev, - TOTAL_RING_BUF_SIZE, &port->ip_dma_ringbuf); - - BUG_ON(!((((int64_t) port->ip_dma_ringbuf) & - (TOTAL_RING_BUF_SIZE - 1)) == 0)); - port->ip_inring = RING(port, RX_A); - port->ip_outring = RING(port, TX_A); - DPRINT_CONFIG(("%s : Port A ip_cpu_ringbuf 0x%p " - "ip_dma_ringbuf 0x%p, ip_inring 0x%p " - "ip_outring 0x%p\n", - __func__, - (void *)port->ip_cpu_ringbuf, - (void *)port->ip_dma_ringbuf, - (void *)port->ip_inring, - (void *)port->ip_outring)); - } - else { - port->ip_serial_regs = &idd->vma->port_b; - port->ip_uart_regs = &idd->vma->sregs.uartb; - - DPRINT_CONFIG(("%s : Port B ip_serial_regs 0x%p " - "ip_uart_regs 0x%p\n", - __func__, - (void *)port->ip_serial_regs, - (void *)port->ip_uart_regs)); - - /* share the ring buffers */ - port->ip_dma_ringbuf = - ports[phys_port - 1]->ip_dma_ringbuf; - port->ip_cpu_ringbuf = - ports[phys_port - 1]->ip_cpu_ringbuf; - port->ip_inring = RING(port, RX_B); - port->ip_outring = RING(port, TX_B); - DPRINT_CONFIG(("%s : Port B ip_cpu_ringbuf 0x%p " - "ip_dma_ringbuf 0x%p, ip_inring 0x%p " - "ip_outring 0x%p\n", - __func__, - (void *)port->ip_cpu_ringbuf, - (void *)port->ip_dma_ringbuf, - (void *)port->ip_inring, - (void *)port->ip_outring)); - } - - DPRINT_CONFIG(("%s : port %d [addr 0x%p] card_ptr 0x%p", - __func__, - phys_port, (void *)port, (void *)card_ptr)); - DPRINT_CONFIG((" ip_serial_regs 0x%p ip_uart_regs 0x%p\n", - (void *)port->ip_serial_regs, - (void *)port->ip_uart_regs)); - - /* Initialize the hardware for IOC3 */ - port_init(port); - - DPRINT_CONFIG(("%s: phys_port %d port 0x%p inring 0x%p " - "outring 0x%p\n", - __func__, - phys_port, (void *)port, - (void *)port->ip_inring, - (void *)port->ip_outring)); - - } - - /* register port with the serial core */ - - if ((ret = ioc3_serial_core_attach(is, idd))) - goto out4; - - Num_of_ioc3_cards++; - - return ret; - - /* error exits that give back resources */ -out4: - for (cnt = 0; cnt < phys_port; cnt++) - kfree(ports[cnt]); - - kfree(card_ptr); - return ret; -} - -static struct ioc3_submodule ioc3uart_ops = { - .name = "IOC3uart", - .probe = ioc3uart_probe, - .remove = ioc3uart_remove, - /* call .intr for both ports initially */ - .irq_mask = SIO_IR_SA | SIO_IR_SB, - .intr = ioc3uart_intr, - .owner = THIS_MODULE, -}; - -/** - * ioc3_detect - module init called, - */ -static int __init ioc3uart_init(void) -{ - int ret; - - /* register with serial core */ - if ((ret = uart_register_driver(&ioc3_uart)) < 0) { - printk(KERN_WARNING - "%s: Couldn't register IOC3 uart serial driver\n", - __func__); - return ret; - } - ret = ioc3_register_submodule(&ioc3uart_ops); - if (ret) - uart_unregister_driver(&ioc3_uart); - return ret; -} - -static void __exit ioc3uart_exit(void) -{ - ioc3_unregister_submodule(&ioc3uart_ops); - uart_unregister_driver(&ioc3_uart); -} - -module_init(ioc3uart_init); -module_exit(ioc3uart_exit); - -MODULE_AUTHOR("Pat Gefre - Silicon Graphics Inc. (SGI) <pfg@sgi.com>"); -MODULE_DESCRIPTION("Serial PCI driver module for SGI IOC3 card"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/ioc4_serial.c b/drivers/serial/ioc4_serial.c deleted file mode 100644 index fcfe82653ac8..000000000000 --- a/drivers/serial/ioc4_serial.c +++ /dev/null @@ -1,2953 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2003-2006 Silicon Graphics, Inc. All Rights Reserved. - */ - - -/* - * This file contains a module version of the ioc4 serial driver. This - * includes all the support functions needed (support functions, etc.) - * and the serial driver itself. - */ -#include <linux/errno.h> -#include <linux/tty.h> -#include <linux/serial.h> -#include <linux/serialP.h> -#include <linux/circ_buf.h> -#include <linux/serial_reg.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/ioc4.h> -#include <linux/serial_core.h> -#include <linux/slab.h> - -/* - * interesting things about the ioc4 - */ - -#define IOC4_NUM_SERIAL_PORTS 4 /* max ports per card */ -#define IOC4_NUM_CARDS 8 /* max cards per partition */ - -#define GET_SIO_IR(_n) (_n == 0) ? (IOC4_SIO_IR_S0) : \ - (_n == 1) ? (IOC4_SIO_IR_S1) : \ - (_n == 2) ? (IOC4_SIO_IR_S2) : \ - (IOC4_SIO_IR_S3) - -#define GET_OTHER_IR(_n) (_n == 0) ? (IOC4_OTHER_IR_S0_MEMERR) : \ - (_n == 1) ? (IOC4_OTHER_IR_S1_MEMERR) : \ - (_n == 2) ? (IOC4_OTHER_IR_S2_MEMERR) : \ - (IOC4_OTHER_IR_S3_MEMERR) - - -/* - * All IOC4 registers are 32 bits wide. - */ - -/* - * PCI Memory Space Map - */ -#define IOC4_PCI_ERR_ADDR_L 0x000 /* Low Error Address */ -#define IOC4_PCI_ERR_ADDR_VLD (0x1 << 0) -#define IOC4_PCI_ERR_ADDR_MST_ID_MSK (0xf << 1) -#define IOC4_PCI_ERR_ADDR_MST_NUM_MSK (0xe << 1) -#define IOC4_PCI_ERR_ADDR_MST_TYP_MSK (0x1 << 1) -#define IOC4_PCI_ERR_ADDR_MUL_ERR (0x1 << 5) -#define IOC4_PCI_ERR_ADDR_ADDR_MSK (0x3ffffff << 6) - -/* Interrupt types */ -#define IOC4_SIO_INTR_TYPE 0 -#define IOC4_OTHER_INTR_TYPE 1 -#define IOC4_NUM_INTR_TYPES 2 - -/* Bitmasks for IOC4_SIO_IR, IOC4_SIO_IEC, and IOC4_SIO_IES */ -#define IOC4_SIO_IR_S0_TX_MT 0x00000001 /* Serial port 0 TX empty */ -#define IOC4_SIO_IR_S0_RX_FULL 0x00000002 /* Port 0 RX buf full */ -#define IOC4_SIO_IR_S0_RX_HIGH 0x00000004 /* Port 0 RX hiwat */ -#define IOC4_SIO_IR_S0_RX_TIMER 0x00000008 /* Port 0 RX timeout */ -#define IOC4_SIO_IR_S0_DELTA_DCD 0x00000010 /* Port 0 delta DCD */ -#define IOC4_SIO_IR_S0_DELTA_CTS 0x00000020 /* Port 0 delta CTS */ -#define IOC4_SIO_IR_S0_INT 0x00000040 /* Port 0 pass-thru intr */ -#define IOC4_SIO_IR_S0_TX_EXPLICIT 0x00000080 /* Port 0 explicit TX thru */ -#define IOC4_SIO_IR_S1_TX_MT 0x00000100 /* Serial port 1 */ -#define IOC4_SIO_IR_S1_RX_FULL 0x00000200 /* */ -#define IOC4_SIO_IR_S1_RX_HIGH 0x00000400 /* */ -#define IOC4_SIO_IR_S1_RX_TIMER 0x00000800 /* */ -#define IOC4_SIO_IR_S1_DELTA_DCD 0x00001000 /* */ -#define IOC4_SIO_IR_S1_DELTA_CTS 0x00002000 /* */ -#define IOC4_SIO_IR_S1_INT 0x00004000 /* */ -#define IOC4_SIO_IR_S1_TX_EXPLICIT 0x00008000 /* */ -#define IOC4_SIO_IR_S2_TX_MT 0x00010000 /* Serial port 2 */ -#define IOC4_SIO_IR_S2_RX_FULL 0x00020000 /* */ -#define IOC4_SIO_IR_S2_RX_HIGH 0x00040000 /* */ -#define IOC4_SIO_IR_S2_RX_TIMER 0x00080000 /* */ -#define IOC4_SIO_IR_S2_DELTA_DCD 0x00100000 /* */ -#define IOC4_SIO_IR_S2_DELTA_CTS 0x00200000 /* */ -#define IOC4_SIO_IR_S2_INT 0x00400000 /* */ -#define IOC4_SIO_IR_S2_TX_EXPLICIT 0x00800000 /* */ -#define IOC4_SIO_IR_S3_TX_MT 0x01000000 /* Serial port 3 */ -#define IOC4_SIO_IR_S3_RX_FULL 0x02000000 /* */ -#define IOC4_SIO_IR_S3_RX_HIGH 0x04000000 /* */ -#define IOC4_SIO_IR_S3_RX_TIMER 0x08000000 /* */ -#define IOC4_SIO_IR_S3_DELTA_DCD 0x10000000 /* */ -#define IOC4_SIO_IR_S3_DELTA_CTS 0x20000000 /* */ -#define IOC4_SIO_IR_S3_INT 0x40000000 /* */ -#define IOC4_SIO_IR_S3_TX_EXPLICIT 0x80000000 /* */ - -/* Per device interrupt masks */ -#define IOC4_SIO_IR_S0 (IOC4_SIO_IR_S0_TX_MT | \ - IOC4_SIO_IR_S0_RX_FULL | \ - IOC4_SIO_IR_S0_RX_HIGH | \ - IOC4_SIO_IR_S0_RX_TIMER | \ - IOC4_SIO_IR_S0_DELTA_DCD | \ - IOC4_SIO_IR_S0_DELTA_CTS | \ - IOC4_SIO_IR_S0_INT | \ - IOC4_SIO_IR_S0_TX_EXPLICIT) -#define IOC4_SIO_IR_S1 (IOC4_SIO_IR_S1_TX_MT | \ - IOC4_SIO_IR_S1_RX_FULL | \ - IOC4_SIO_IR_S1_RX_HIGH | \ - IOC4_SIO_IR_S1_RX_TIMER | \ - IOC4_SIO_IR_S1_DELTA_DCD | \ - IOC4_SIO_IR_S1_DELTA_CTS | \ - IOC4_SIO_IR_S1_INT | \ - IOC4_SIO_IR_S1_TX_EXPLICIT) -#define IOC4_SIO_IR_S2 (IOC4_SIO_IR_S2_TX_MT | \ - IOC4_SIO_IR_S2_RX_FULL | \ - IOC4_SIO_IR_S2_RX_HIGH | \ - IOC4_SIO_IR_S2_RX_TIMER | \ - IOC4_SIO_IR_S2_DELTA_DCD | \ - IOC4_SIO_IR_S2_DELTA_CTS | \ - IOC4_SIO_IR_S2_INT | \ - IOC4_SIO_IR_S2_TX_EXPLICIT) -#define IOC4_SIO_IR_S3 (IOC4_SIO_IR_S3_TX_MT | \ - IOC4_SIO_IR_S3_RX_FULL | \ - IOC4_SIO_IR_S3_RX_HIGH | \ - IOC4_SIO_IR_S3_RX_TIMER | \ - IOC4_SIO_IR_S3_DELTA_DCD | \ - IOC4_SIO_IR_S3_DELTA_CTS | \ - IOC4_SIO_IR_S3_INT | \ - IOC4_SIO_IR_S3_TX_EXPLICIT) - -/* Bitmasks for IOC4_OTHER_IR, IOC4_OTHER_IEC, and IOC4_OTHER_IES */ -#define IOC4_OTHER_IR_ATA_INT 0x00000001 /* ATAPI intr pass-thru */ -#define IOC4_OTHER_IR_ATA_MEMERR 0x00000002 /* ATAPI DMA PCI error */ -#define IOC4_OTHER_IR_S0_MEMERR 0x00000004 /* Port 0 PCI error */ -#define IOC4_OTHER_IR_S1_MEMERR 0x00000008 /* Port 1 PCI error */ -#define IOC4_OTHER_IR_S2_MEMERR 0x00000010 /* Port 2 PCI error */ -#define IOC4_OTHER_IR_S3_MEMERR 0x00000020 /* Port 3 PCI error */ -#define IOC4_OTHER_IR_KBD_INT 0x00000040 /* Keyboard/mouse */ -#define IOC4_OTHER_IR_RESERVED 0x007fff80 /* Reserved */ -#define IOC4_OTHER_IR_RT_INT 0x00800000 /* INT_OUT section output */ -#define IOC4_OTHER_IR_GEN_INT 0xff000000 /* Generic pins */ - -#define IOC4_OTHER_IR_SER_MEMERR (IOC4_OTHER_IR_S0_MEMERR | IOC4_OTHER_IR_S1_MEMERR | \ - IOC4_OTHER_IR_S2_MEMERR | IOC4_OTHER_IR_S3_MEMERR) - -/* Bitmasks for IOC4_SIO_CR */ -#define IOC4_SIO_CR_CMD_PULSE_SHIFT 0 /* byte bus strobe shift */ -#define IOC4_SIO_CR_ARB_DIAG_TX0 0x00000000 -#define IOC4_SIO_CR_ARB_DIAG_RX0 0x00000010 -#define IOC4_SIO_CR_ARB_DIAG_TX1 0x00000020 -#define IOC4_SIO_CR_ARB_DIAG_RX1 0x00000030 -#define IOC4_SIO_CR_ARB_DIAG_TX2 0x00000040 -#define IOC4_SIO_CR_ARB_DIAG_RX2 0x00000050 -#define IOC4_SIO_CR_ARB_DIAG_TX3 0x00000060 -#define IOC4_SIO_CR_ARB_DIAG_RX3 0x00000070 -#define IOC4_SIO_CR_SIO_DIAG_IDLE 0x00000080 /* 0 -> active request among - serial ports (ro) */ -/* Defs for some of the generic I/O pins */ -#define IOC4_GPCR_UART0_MODESEL 0x10 /* Pin is output to port 0 - mode sel */ -#define IOC4_GPCR_UART1_MODESEL 0x20 /* Pin is output to port 1 - mode sel */ -#define IOC4_GPCR_UART2_MODESEL 0x40 /* Pin is output to port 2 - mode sel */ -#define IOC4_GPCR_UART3_MODESEL 0x80 /* Pin is output to port 3 - mode sel */ - -#define IOC4_GPPR_UART0_MODESEL_PIN 4 /* GIO pin controlling - uart 0 mode select */ -#define IOC4_GPPR_UART1_MODESEL_PIN 5 /* GIO pin controlling - uart 1 mode select */ -#define IOC4_GPPR_UART2_MODESEL_PIN 6 /* GIO pin controlling - uart 2 mode select */ -#define IOC4_GPPR_UART3_MODESEL_PIN 7 /* GIO pin controlling - uart 3 mode select */ - -/* Bitmasks for serial RX status byte */ -#define IOC4_RXSB_OVERRUN 0x01 /* Char(s) lost */ -#define IOC4_RXSB_PAR_ERR 0x02 /* Parity error */ -#define IOC4_RXSB_FRAME_ERR 0x04 /* Framing error */ -#define IOC4_RXSB_BREAK 0x08 /* Break character */ -#define IOC4_RXSB_CTS 0x10 /* State of CTS */ -#define IOC4_RXSB_DCD 0x20 /* State of DCD */ -#define IOC4_RXSB_MODEM_VALID 0x40 /* DCD, CTS, and OVERRUN are valid */ -#define IOC4_RXSB_DATA_VALID 0x80 /* Data byte, FRAME_ERR PAR_ERR - * & BREAK valid */ - -/* Bitmasks for serial TX control byte */ -#define IOC4_TXCB_INT_WHEN_DONE 0x20 /* Interrupt after this byte is sent */ -#define IOC4_TXCB_INVALID 0x00 /* Byte is invalid */ -#define IOC4_TXCB_VALID 0x40 /* Byte is valid */ -#define IOC4_TXCB_MCR 0x80 /* Data<7:0> to modem control reg */ -#define IOC4_TXCB_DELAY 0xc0 /* Delay data<7:0> mSec */ - -/* Bitmasks for IOC4_SBBR_L */ -#define IOC4_SBBR_L_SIZE 0x00000001 /* 0 == 1KB rings, 1 == 4KB rings */ - -/* Bitmasks for IOC4_SSCR_<3:0> */ -#define IOC4_SSCR_RX_THRESHOLD 0x000001ff /* Hiwater mark */ -#define IOC4_SSCR_TX_TIMER_BUSY 0x00010000 /* TX timer in progress */ -#define IOC4_SSCR_HFC_EN 0x00020000 /* Hardware flow control enabled */ -#define IOC4_SSCR_RX_RING_DCD 0x00040000 /* Post RX record on delta-DCD */ -#define IOC4_SSCR_RX_RING_CTS 0x00080000 /* Post RX record on delta-CTS */ -#define IOC4_SSCR_DIAG 0x00200000 /* Bypass clock divider for sim */ -#define IOC4_SSCR_RX_DRAIN 0x08000000 /* Drain RX buffer to memory */ -#define IOC4_SSCR_DMA_EN 0x10000000 /* Enable ring buffer DMA */ -#define IOC4_SSCR_DMA_PAUSE 0x20000000 /* Pause DMA */ -#define IOC4_SSCR_PAUSE_STATE 0x40000000 /* Sets when PAUSE takes effect */ -#define IOC4_SSCR_RESET 0x80000000 /* Reset DMA channels */ - -/* All producer/comsumer pointers are the same bitfield */ -#define IOC4_PROD_CONS_PTR_4K 0x00000ff8 /* For 4K buffers */ -#define IOC4_PROD_CONS_PTR_1K 0x000003f8 /* For 1K buffers */ -#define IOC4_PROD_CONS_PTR_OFF 3 - -/* Bitmasks for IOC4_SRCIR_<3:0> */ -#define IOC4_SRCIR_ARM 0x80000000 /* Arm RX timer */ - -/* Bitmasks for IOC4_SHADOW_<3:0> */ -#define IOC4_SHADOW_DR 0x00000001 /* Data ready */ -#define IOC4_SHADOW_OE 0x00000002 /* Overrun error */ -#define IOC4_SHADOW_PE 0x00000004 /* Parity error */ -#define IOC4_SHADOW_FE 0x00000008 /* Framing error */ -#define IOC4_SHADOW_BI 0x00000010 /* Break interrupt */ -#define IOC4_SHADOW_THRE 0x00000020 /* Xmit holding register empty */ -#define IOC4_SHADOW_TEMT 0x00000040 /* Xmit shift register empty */ -#define IOC4_SHADOW_RFCE 0x00000080 /* Char in RX fifo has an error */ -#define IOC4_SHADOW_DCTS 0x00010000 /* Delta clear to send */ -#define IOC4_SHADOW_DDCD 0x00080000 /* Delta data carrier detect */ -#define IOC4_SHADOW_CTS 0x00100000 /* Clear to send */ -#define IOC4_SHADOW_DCD 0x00800000 /* Data carrier detect */ -#define IOC4_SHADOW_DTR 0x01000000 /* Data terminal ready */ -#define IOC4_SHADOW_RTS 0x02000000 /* Request to send */ -#define IOC4_SHADOW_OUT1 0x04000000 /* 16550 OUT1 bit */ -#define IOC4_SHADOW_OUT2 0x08000000 /* 16550 OUT2 bit */ -#define IOC4_SHADOW_LOOP 0x10000000 /* Loopback enabled */ - -/* Bitmasks for IOC4_SRTR_<3:0> */ -#define IOC4_SRTR_CNT 0x00000fff /* Reload value for RX timer */ -#define IOC4_SRTR_CNT_VAL 0x0fff0000 /* Current value of RX timer */ -#define IOC4_SRTR_CNT_VAL_SHIFT 16 -#define IOC4_SRTR_HZ 16000 /* SRTR clock frequency */ - -/* Serial port register map used for DMA and PIO serial I/O */ -struct ioc4_serialregs { - uint32_t sscr; - uint32_t stpir; - uint32_t stcir; - uint32_t srpir; - uint32_t srcir; - uint32_t srtr; - uint32_t shadow; -}; - -/* IOC4 UART register map */ -struct ioc4_uartregs { - char i4u_lcr; - union { - char iir; /* read only */ - char fcr; /* write only */ - } u3; - union { - char ier; /* DLAB == 0 */ - char dlm; /* DLAB == 1 */ - } u2; - union { - char rbr; /* read only, DLAB == 0 */ - char thr; /* write only, DLAB == 0 */ - char dll; /* DLAB == 1 */ - } u1; - char i4u_scr; - char i4u_msr; - char i4u_lsr; - char i4u_mcr; -}; - -/* short names */ -#define i4u_dll u1.dll -#define i4u_ier u2.ier -#define i4u_dlm u2.dlm -#define i4u_fcr u3.fcr - -/* Serial port registers used for DMA serial I/O */ -struct ioc4_serial { - uint32_t sbbr01_l; - uint32_t sbbr01_h; - uint32_t sbbr23_l; - uint32_t sbbr23_h; - - struct ioc4_serialregs port_0; - struct ioc4_serialregs port_1; - struct ioc4_serialregs port_2; - struct ioc4_serialregs port_3; - struct ioc4_uartregs uart_0; - struct ioc4_uartregs uart_1; - struct ioc4_uartregs uart_2; - struct ioc4_uartregs uart_3; -} ioc4_serial; - -/* UART clock speed */ -#define IOC4_SER_XIN_CLK_66 66666667 -#define IOC4_SER_XIN_CLK_33 33333333 - -#define IOC4_W_IES 0 -#define IOC4_W_IEC 1 - -typedef void ioc4_intr_func_f(void *, uint32_t); -typedef ioc4_intr_func_f *ioc4_intr_func_t; - -static unsigned int Num_of_ioc4_cards; - -/* defining this will get you LOTS of great debug info */ -//#define DEBUG_INTERRUPTS -#define DPRINT_CONFIG(_x...) ; -//#define DPRINT_CONFIG(_x...) printk _x - -/* number of characters left in xmit buffer before we ask for more */ -#define WAKEUP_CHARS 256 - -/* number of characters we want to transmit to the lower level at a time */ -#define IOC4_MAX_CHARS 256 -#define IOC4_FIFO_CHARS 255 - -/* Device name we're using */ -#define DEVICE_NAME_RS232 "ttyIOC" -#define DEVICE_NAME_RS422 "ttyAIOC" -#define DEVICE_MAJOR 204 -#define DEVICE_MINOR_RS232 50 -#define DEVICE_MINOR_RS422 84 - - -/* register offsets */ -#define IOC4_SERIAL_OFFSET 0x300 - -/* flags for next_char_state */ -#define NCS_BREAK 0x1 -#define NCS_PARITY 0x2 -#define NCS_FRAMING 0x4 -#define NCS_OVERRUN 0x8 - -/* cause we need SOME parameters ... */ -#define MIN_BAUD_SUPPORTED 1200 -#define MAX_BAUD_SUPPORTED 115200 - -/* protocol types supported */ -#define PROTO_RS232 3 -#define PROTO_RS422 7 - -/* Notification types */ -#define N_DATA_READY 0x01 -#define N_OUTPUT_LOWAT 0x02 -#define N_BREAK 0x04 -#define N_PARITY_ERROR 0x08 -#define N_FRAMING_ERROR 0x10 -#define N_OVERRUN_ERROR 0x20 -#define N_DDCD 0x40 -#define N_DCTS 0x80 - -#define N_ALL_INPUT (N_DATA_READY | N_BREAK | \ - N_PARITY_ERROR | N_FRAMING_ERROR | \ - N_OVERRUN_ERROR | N_DDCD | N_DCTS) - -#define N_ALL_OUTPUT N_OUTPUT_LOWAT - -#define N_ALL_ERRORS (N_PARITY_ERROR | N_FRAMING_ERROR | N_OVERRUN_ERROR) - -#define N_ALL (N_DATA_READY | N_OUTPUT_LOWAT | N_BREAK | \ - N_PARITY_ERROR | N_FRAMING_ERROR | \ - N_OVERRUN_ERROR | N_DDCD | N_DCTS) - -#define SER_DIVISOR(_x, clk) (((clk) + (_x) * 8) / ((_x) * 16)) -#define DIVISOR_TO_BAUD(div, clk) ((clk) / 16 / (div)) - -/* Some masks */ -#define LCR_MASK_BITS_CHAR (UART_LCR_WLEN5 | UART_LCR_WLEN6 \ - | UART_LCR_WLEN7 | UART_LCR_WLEN8) -#define LCR_MASK_STOP_BITS (UART_LCR_STOP) - -#define PENDING(_p) (readl(&(_p)->ip_mem->sio_ir.raw) & _p->ip_ienb) -#define READ_SIO_IR(_p) readl(&(_p)->ip_mem->sio_ir.raw) - -/* Default to 4k buffers */ -#ifdef IOC4_1K_BUFFERS -#define RING_BUF_SIZE 1024 -#define IOC4_BUF_SIZE_BIT 0 -#define PROD_CONS_MASK IOC4_PROD_CONS_PTR_1K -#else -#define RING_BUF_SIZE 4096 -#define IOC4_BUF_SIZE_BIT IOC4_SBBR_L_SIZE -#define PROD_CONS_MASK IOC4_PROD_CONS_PTR_4K -#endif - -#define TOTAL_RING_BUF_SIZE (RING_BUF_SIZE * 4) - -/* - * This is the entry saved by the driver - one per card - */ - -#define UART_PORT_MIN 0 -#define UART_PORT_RS232 UART_PORT_MIN -#define UART_PORT_RS422 1 -#define UART_PORT_COUNT 2 /* one for each mode */ - -struct ioc4_control { - int ic_irq; - struct { - /* uart ports are allocated here - 1 for rs232, 1 for rs422 */ - struct uart_port icp_uart_port[UART_PORT_COUNT]; - /* Handy reference material */ - struct ioc4_port *icp_port; - } ic_port[IOC4_NUM_SERIAL_PORTS]; - struct ioc4_soft *ic_soft; -}; - -/* - * per-IOC4 data structure - */ -#define MAX_IOC4_INTR_ENTS (8 * sizeof(uint32_t)) -struct ioc4_soft { - struct ioc4_misc_regs __iomem *is_ioc4_misc_addr; - struct ioc4_serial __iomem *is_ioc4_serial_addr; - - /* Each interrupt type has an entry in the array */ - struct ioc4_intr_type { - - /* - * Each in-use entry in this array contains at least - * one nonzero bit in sd_bits; no two entries in this - * array have overlapping sd_bits values. - */ - struct ioc4_intr_info { - uint32_t sd_bits; - ioc4_intr_func_f *sd_intr; - void *sd_info; - } is_intr_info[MAX_IOC4_INTR_ENTS]; - - /* Number of entries active in the above array */ - atomic_t is_num_intrs; - } is_intr_type[IOC4_NUM_INTR_TYPES]; - - /* is_ir_lock must be held while - * modifying sio_ie values, so - * we can be sure that sio_ie is - * not changing when we read it - * along with sio_ir. - */ - spinlock_t is_ir_lock; /* SIO_IE[SC] mod lock */ -}; - -/* Local port info for each IOC4 serial ports */ -struct ioc4_port { - struct uart_port *ip_port; /* current active port ptr */ - /* Ptrs for all ports */ - struct uart_port *ip_all_ports[UART_PORT_COUNT]; - /* Back ptrs for this port */ - struct ioc4_control *ip_control; - struct pci_dev *ip_pdev; - struct ioc4_soft *ip_ioc4_soft; - - /* pci mem addresses */ - struct ioc4_misc_regs __iomem *ip_mem; - struct ioc4_serial __iomem *ip_serial; - struct ioc4_serialregs __iomem *ip_serial_regs; - struct ioc4_uartregs __iomem *ip_uart_regs; - - /* Ring buffer page for this port */ - dma_addr_t ip_dma_ringbuf; - /* vaddr of ring buffer */ - struct ring_buffer *ip_cpu_ringbuf; - - /* Rings for this port */ - struct ring *ip_inring; - struct ring *ip_outring; - - /* Hook to port specific values */ - struct hooks *ip_hooks; - - spinlock_t ip_lock; - - /* Various rx/tx parameters */ - int ip_baud; - int ip_tx_lowat; - int ip_rx_timeout; - - /* Copy of notification bits */ - int ip_notify; - - /* Shadow copies of various registers so we don't need to PIO - * read them constantly - */ - uint32_t ip_ienb; /* Enabled interrupts */ - uint32_t ip_sscr; - uint32_t ip_tx_prod; - uint32_t ip_rx_cons; - int ip_pci_bus_speed; - unsigned char ip_flags; -}; - -/* tx low water mark. We need to notify the driver whenever tx is getting - * close to empty so it can refill the tx buffer and keep things going. - * Let's assume that if we interrupt 1 ms before the tx goes idle, we'll - * have no trouble getting in more chars in time (I certainly hope so). - */ -#define TX_LOWAT_LATENCY 1000 -#define TX_LOWAT_HZ (1000000 / TX_LOWAT_LATENCY) -#define TX_LOWAT_CHARS(baud) (baud / 10 / TX_LOWAT_HZ) - -/* Flags per port */ -#define INPUT_HIGH 0x01 -#define DCD_ON 0x02 -#define LOWAT_WRITTEN 0x04 -#define READ_ABORTED 0x08 -#define PORT_ACTIVE 0x10 -#define PORT_INACTIVE 0 /* This is the value when "off" */ - - -/* Since each port has different register offsets and bitmasks - * for everything, we'll store those that we need in tables so we - * don't have to be constantly checking the port we are dealing with. - */ -struct hooks { - uint32_t intr_delta_dcd; - uint32_t intr_delta_cts; - uint32_t intr_tx_mt; - uint32_t intr_rx_timer; - uint32_t intr_rx_high; - uint32_t intr_tx_explicit; - uint32_t intr_dma_error; - uint32_t intr_clear; - uint32_t intr_all; - int rs422_select_pin; -}; - -static struct hooks hooks_array[IOC4_NUM_SERIAL_PORTS] = { - /* Values for port 0 */ - { - IOC4_SIO_IR_S0_DELTA_DCD, IOC4_SIO_IR_S0_DELTA_CTS, - IOC4_SIO_IR_S0_TX_MT, IOC4_SIO_IR_S0_RX_TIMER, - IOC4_SIO_IR_S0_RX_HIGH, IOC4_SIO_IR_S0_TX_EXPLICIT, - IOC4_OTHER_IR_S0_MEMERR, - (IOC4_SIO_IR_S0_TX_MT | IOC4_SIO_IR_S0_RX_FULL | - IOC4_SIO_IR_S0_RX_HIGH | IOC4_SIO_IR_S0_RX_TIMER | - IOC4_SIO_IR_S0_DELTA_DCD | IOC4_SIO_IR_S0_DELTA_CTS | - IOC4_SIO_IR_S0_INT | IOC4_SIO_IR_S0_TX_EXPLICIT), - IOC4_SIO_IR_S0, IOC4_GPPR_UART0_MODESEL_PIN, - }, - - /* Values for port 1 */ - { - IOC4_SIO_IR_S1_DELTA_DCD, IOC4_SIO_IR_S1_DELTA_CTS, - IOC4_SIO_IR_S1_TX_MT, IOC4_SIO_IR_S1_RX_TIMER, - IOC4_SIO_IR_S1_RX_HIGH, IOC4_SIO_IR_S1_TX_EXPLICIT, - IOC4_OTHER_IR_S1_MEMERR, - (IOC4_SIO_IR_S1_TX_MT | IOC4_SIO_IR_S1_RX_FULL | - IOC4_SIO_IR_S1_RX_HIGH | IOC4_SIO_IR_S1_RX_TIMER | - IOC4_SIO_IR_S1_DELTA_DCD | IOC4_SIO_IR_S1_DELTA_CTS | - IOC4_SIO_IR_S1_INT | IOC4_SIO_IR_S1_TX_EXPLICIT), - IOC4_SIO_IR_S1, IOC4_GPPR_UART1_MODESEL_PIN, - }, - - /* Values for port 2 */ - { - IOC4_SIO_IR_S2_DELTA_DCD, IOC4_SIO_IR_S2_DELTA_CTS, - IOC4_SIO_IR_S2_TX_MT, IOC4_SIO_IR_S2_RX_TIMER, - IOC4_SIO_IR_S2_RX_HIGH, IOC4_SIO_IR_S2_TX_EXPLICIT, - IOC4_OTHER_IR_S2_MEMERR, - (IOC4_SIO_IR_S2_TX_MT | IOC4_SIO_IR_S2_RX_FULL | - IOC4_SIO_IR_S2_RX_HIGH | IOC4_SIO_IR_S2_RX_TIMER | - IOC4_SIO_IR_S2_DELTA_DCD | IOC4_SIO_IR_S2_DELTA_CTS | - IOC4_SIO_IR_S2_INT | IOC4_SIO_IR_S2_TX_EXPLICIT), - IOC4_SIO_IR_S2, IOC4_GPPR_UART2_MODESEL_PIN, - }, - - /* Values for port 3 */ - { - IOC4_SIO_IR_S3_DELTA_DCD, IOC4_SIO_IR_S3_DELTA_CTS, - IOC4_SIO_IR_S3_TX_MT, IOC4_SIO_IR_S3_RX_TIMER, - IOC4_SIO_IR_S3_RX_HIGH, IOC4_SIO_IR_S3_TX_EXPLICIT, - IOC4_OTHER_IR_S3_MEMERR, - (IOC4_SIO_IR_S3_TX_MT | IOC4_SIO_IR_S3_RX_FULL | - IOC4_SIO_IR_S3_RX_HIGH | IOC4_SIO_IR_S3_RX_TIMER | - IOC4_SIO_IR_S3_DELTA_DCD | IOC4_SIO_IR_S3_DELTA_CTS | - IOC4_SIO_IR_S3_INT | IOC4_SIO_IR_S3_TX_EXPLICIT), - IOC4_SIO_IR_S3, IOC4_GPPR_UART3_MODESEL_PIN, - } -}; - -/* A ring buffer entry */ -struct ring_entry { - union { - struct { - uint32_t alldata; - uint32_t allsc; - } all; - struct { - char data[4]; /* data bytes */ - char sc[4]; /* status/control */ - } s; - } u; -}; - -/* Test the valid bits in any of the 4 sc chars using "allsc" member */ -#define RING_ANY_VALID \ - ((uint32_t)(IOC4_RXSB_MODEM_VALID | IOC4_RXSB_DATA_VALID) * 0x01010101) - -#define ring_sc u.s.sc -#define ring_data u.s.data -#define ring_allsc u.all.allsc - -/* Number of entries per ring buffer. */ -#define ENTRIES_PER_RING (RING_BUF_SIZE / (int) sizeof(struct ring_entry)) - -/* An individual ring */ -struct ring { - struct ring_entry entries[ENTRIES_PER_RING]; -}; - -/* The whole enchilada */ -struct ring_buffer { - struct ring TX_0_OR_2; - struct ring RX_0_OR_2; - struct ring TX_1_OR_3; - struct ring RX_1_OR_3; -}; - -/* Get a ring from a port struct */ -#define RING(_p, _wh) &(((struct ring_buffer *)((_p)->ip_cpu_ringbuf))->_wh) - -/* Infinite loop detection. - */ -#define MAXITER 10000000 - -/* Prototypes */ -static void receive_chars(struct uart_port *); -static void handle_intr(void *arg, uint32_t sio_ir); - -/* - * port_is_active - determines if this port is currently active - * @port: ptr to soft struct for this port - * @uart_port: uart port to test for - */ -static inline int port_is_active(struct ioc4_port *port, - struct uart_port *uart_port) -{ - if (port) { - if ((port->ip_flags & PORT_ACTIVE) - && (port->ip_port == uart_port)) - return 1; - } - return 0; -} - - -/** - * write_ireg - write the interrupt regs - * @ioc4_soft: ptr to soft struct for this port - * @val: value to write - * @which: which register - * @type: which ireg set - */ -static inline void -write_ireg(struct ioc4_soft *ioc4_soft, uint32_t val, int which, int type) -{ - struct ioc4_misc_regs __iomem *mem = ioc4_soft->is_ioc4_misc_addr; - unsigned long flags; - - spin_lock_irqsave(&ioc4_soft->is_ir_lock, flags); - - switch (type) { - case IOC4_SIO_INTR_TYPE: - switch (which) { - case IOC4_W_IES: - writel(val, &mem->sio_ies.raw); - break; - - case IOC4_W_IEC: - writel(val, &mem->sio_iec.raw); - break; - } - break; - - case IOC4_OTHER_INTR_TYPE: - switch (which) { - case IOC4_W_IES: - writel(val, &mem->other_ies.raw); - break; - - case IOC4_W_IEC: - writel(val, &mem->other_iec.raw); - break; - } - break; - - default: - break; - } - spin_unlock_irqrestore(&ioc4_soft->is_ir_lock, flags); -} - -/** - * set_baud - Baud rate setting code - * @port: port to set - * @baud: baud rate to use - */ -static int set_baud(struct ioc4_port *port, int baud) -{ - int actual_baud; - int diff; - int lcr; - unsigned short divisor; - struct ioc4_uartregs __iomem *uart; - - divisor = SER_DIVISOR(baud, port->ip_pci_bus_speed); - if (!divisor) - return 1; - actual_baud = DIVISOR_TO_BAUD(divisor, port->ip_pci_bus_speed); - - diff = actual_baud - baud; - if (diff < 0) - diff = -diff; - - /* If we're within 1%, we've found a match */ - if (diff * 100 > actual_baud) - return 1; - - uart = port->ip_uart_regs; - lcr = readb(&uart->i4u_lcr); - writeb(lcr | UART_LCR_DLAB, &uart->i4u_lcr); - writeb((unsigned char)divisor, &uart->i4u_dll); - writeb((unsigned char)(divisor >> 8), &uart->i4u_dlm); - writeb(lcr, &uart->i4u_lcr); - return 0; -} - - -/** - * get_ioc4_port - given a uart port, return the control structure - * @port: uart port - * @set: set this port as current - */ -static struct ioc4_port *get_ioc4_port(struct uart_port *the_port, int set) -{ - struct ioc4_driver_data *idd = dev_get_drvdata(the_port->dev); - struct ioc4_control *control = idd->idd_serial_data; - struct ioc4_port *port; - int port_num, port_type; - - if (control) { - for ( port_num = 0; port_num < IOC4_NUM_SERIAL_PORTS; - port_num++ ) { - port = control->ic_port[port_num].icp_port; - if (!port) - continue; - for (port_type = UART_PORT_MIN; - port_type < UART_PORT_COUNT; - port_type++) { - if (the_port == port->ip_all_ports - [port_type]) { - /* set local copy */ - if (set) { - port->ip_port = the_port; - } - return port; - } - } - } - } - return NULL; -} - -/* The IOC4 hardware provides no atomic way to determine if interrupts - * are pending since two reads are required to do so. The handler must - * read the SIO_IR and the SIO_IES, and take the logical and of the - * two. When this value is zero, all interrupts have been serviced and - * the handler may return. - * - * This has the unfortunate "hole" that, if some other CPU or - * some other thread or some higher level interrupt manages to - * modify SIO_IE between our reads of SIO_IR and SIO_IE, we may - * think we have observed SIO_IR&SIO_IE==0 when in fact this - * condition never really occurred. - * - * To solve this, we use a simple spinlock that must be held - * whenever modifying SIO_IE; holding this lock while observing - * both SIO_IR and SIO_IE guarantees that we do not falsely - * conclude that no enabled interrupts are pending. - */ - -static inline uint32_t -pending_intrs(struct ioc4_soft *soft, int type) -{ - struct ioc4_misc_regs __iomem *mem = soft->is_ioc4_misc_addr; - unsigned long flag; - uint32_t intrs = 0; - - BUG_ON(!((type == IOC4_SIO_INTR_TYPE) - || (type == IOC4_OTHER_INTR_TYPE))); - - spin_lock_irqsave(&soft->is_ir_lock, flag); - - switch (type) { - case IOC4_SIO_INTR_TYPE: - intrs = readl(&mem->sio_ir.raw) & readl(&mem->sio_ies.raw); - break; - - case IOC4_OTHER_INTR_TYPE: - intrs = readl(&mem->other_ir.raw) & readl(&mem->other_ies.raw); - - /* Don't process any ATA interrupte */ - intrs &= ~(IOC4_OTHER_IR_ATA_INT | IOC4_OTHER_IR_ATA_MEMERR); - break; - - default: - break; - } - spin_unlock_irqrestore(&soft->is_ir_lock, flag); - return intrs; -} - -/** - * port_init - Initialize the sio and ioc4 hardware for a given port - * called per port from attach... - * @port: port to initialize - */ -static int inline port_init(struct ioc4_port *port) -{ - uint32_t sio_cr; - struct hooks *hooks = port->ip_hooks; - struct ioc4_uartregs __iomem *uart; - - /* Idle the IOC4 serial interface */ - writel(IOC4_SSCR_RESET, &port->ip_serial_regs->sscr); - - /* Wait until any pending bus activity for this port has ceased */ - do - sio_cr = readl(&port->ip_mem->sio_cr.raw); - while (!(sio_cr & IOC4_SIO_CR_SIO_DIAG_IDLE)); - - /* Finish reset sequence */ - writel(0, &port->ip_serial_regs->sscr); - - /* Once RESET is done, reload cached tx_prod and rx_cons values - * and set rings to empty by making prod == cons - */ - port->ip_tx_prod = readl(&port->ip_serial_regs->stcir) & PROD_CONS_MASK; - writel(port->ip_tx_prod, &port->ip_serial_regs->stpir); - port->ip_rx_cons = readl(&port->ip_serial_regs->srpir) & PROD_CONS_MASK; - writel(port->ip_rx_cons | IOC4_SRCIR_ARM, &port->ip_serial_regs->srcir); - - /* Disable interrupts for this 16550 */ - uart = port->ip_uart_regs; - writeb(0, &uart->i4u_lcr); - writeb(0, &uart->i4u_ier); - - /* Set the default baud */ - set_baud(port, port->ip_baud); - - /* Set line control to 8 bits no parity */ - writeb(UART_LCR_WLEN8 | 0, &uart->i4u_lcr); - /* UART_LCR_STOP == 1 stop */ - - /* Enable the FIFOs */ - writeb(UART_FCR_ENABLE_FIFO, &uart->i4u_fcr); - /* then reset 16550 FIFOs */ - writeb(UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT, - &uart->i4u_fcr); - - /* Clear modem control register */ - writeb(0, &uart->i4u_mcr); - - /* Clear deltas in modem status register */ - readb(&uart->i4u_msr); - - /* Only do this once per port pair */ - if (port->ip_hooks == &hooks_array[0] - || port->ip_hooks == &hooks_array[2]) { - unsigned long ring_pci_addr; - uint32_t __iomem *sbbr_l; - uint32_t __iomem *sbbr_h; - - if (port->ip_hooks == &hooks_array[0]) { - sbbr_l = &port->ip_serial->sbbr01_l; - sbbr_h = &port->ip_serial->sbbr01_h; - } else { - sbbr_l = &port->ip_serial->sbbr23_l; - sbbr_h = &port->ip_serial->sbbr23_h; - } - - ring_pci_addr = (unsigned long __iomem)port->ip_dma_ringbuf; - DPRINT_CONFIG(("%s: ring_pci_addr 0x%lx\n", - __func__, ring_pci_addr)); - - writel((unsigned int)((uint64_t)ring_pci_addr >> 32), sbbr_h); - writel((unsigned int)ring_pci_addr | IOC4_BUF_SIZE_BIT, sbbr_l); - } - - /* Set the receive timeout value to 10 msec */ - writel(IOC4_SRTR_HZ / 100, &port->ip_serial_regs->srtr); - - /* Set rx threshold, enable DMA */ - /* Set high water mark at 3/4 of full ring */ - port->ip_sscr = (ENTRIES_PER_RING * 3 / 4); - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - - /* Disable and clear all serial related interrupt bits */ - write_ireg(port->ip_ioc4_soft, hooks->intr_clear, - IOC4_W_IEC, IOC4_SIO_INTR_TYPE); - port->ip_ienb &= ~hooks->intr_clear; - writel(hooks->intr_clear, &port->ip_mem->sio_ir.raw); - return 0; -} - -/** - * handle_dma_error_intr - service any pending DMA error interrupts for the - * given port - 2nd level called via sd_intr - * @arg: handler arg - * @other_ir: ioc4regs - */ -static void handle_dma_error_intr(void *arg, uint32_t other_ir) -{ - struct ioc4_port *port = (struct ioc4_port *)arg; - struct hooks *hooks = port->ip_hooks; - unsigned long flags; - - spin_lock_irqsave(&port->ip_lock, flags); - - /* ACK the interrupt */ - writel(hooks->intr_dma_error, &port->ip_mem->other_ir.raw); - - if (readl(&port->ip_mem->pci_err_addr_l.raw) & IOC4_PCI_ERR_ADDR_VLD) { - printk(KERN_ERR - "PCI error address is 0x%llx, " - "master is serial port %c %s\n", - (((uint64_t)readl(&port->ip_mem->pci_err_addr_h) - << 32) - | readl(&port->ip_mem->pci_err_addr_l.raw)) - & IOC4_PCI_ERR_ADDR_ADDR_MSK, '1' + - ((char)(readl(&port->ip_mem->pci_err_addr_l.raw) & - IOC4_PCI_ERR_ADDR_MST_NUM_MSK) >> 1), - (readl(&port->ip_mem->pci_err_addr_l.raw) - & IOC4_PCI_ERR_ADDR_MST_TYP_MSK) - ? "RX" : "TX"); - - if (readl(&port->ip_mem->pci_err_addr_l.raw) - & IOC4_PCI_ERR_ADDR_MUL_ERR) { - printk(KERN_ERR - "Multiple errors occurred\n"); - } - } - spin_unlock_irqrestore(&port->ip_lock, flags); - - /* Re-enable DMA error interrupts */ - write_ireg(port->ip_ioc4_soft, hooks->intr_dma_error, IOC4_W_IES, - IOC4_OTHER_INTR_TYPE); -} - -/** - * intr_connect - interrupt connect function - * @soft: soft struct for this card - * @type: interrupt type - * @intrbits: bit pattern to set - * @intr: handler function - * @info: handler arg - */ -static void -intr_connect(struct ioc4_soft *soft, int type, - uint32_t intrbits, ioc4_intr_func_f * intr, void *info) -{ - int i; - struct ioc4_intr_info *intr_ptr; - - BUG_ON(!((type == IOC4_SIO_INTR_TYPE) - || (type == IOC4_OTHER_INTR_TYPE))); - - i = atomic_inc(&soft-> is_intr_type[type].is_num_intrs) - 1; - BUG_ON(!(i < MAX_IOC4_INTR_ENTS || (printk("i %d\n", i), 0))); - - /* Save off the lower level interrupt handler */ - intr_ptr = &soft->is_intr_type[type].is_intr_info[i]; - intr_ptr->sd_bits = intrbits; - intr_ptr->sd_intr = intr; - intr_ptr->sd_info = info; -} - -/** - * ioc4_intr - Top level IOC4 interrupt handler. - * @irq: irq value - * @arg: handler arg - */ - -static irqreturn_t ioc4_intr(int irq, void *arg) -{ - struct ioc4_soft *soft; - uint32_t this_ir, this_mir; - int xx, num_intrs = 0; - int intr_type; - int handled = 0; - struct ioc4_intr_info *intr_info; - - soft = arg; - for (intr_type = 0; intr_type < IOC4_NUM_INTR_TYPES; intr_type++) { - num_intrs = (int)atomic_read( - &soft->is_intr_type[intr_type].is_num_intrs); - - this_mir = this_ir = pending_intrs(soft, intr_type); - - /* Farm out the interrupt to the various drivers depending on - * which interrupt bits are set. - */ - for (xx = 0; xx < num_intrs; xx++) { - intr_info = &soft->is_intr_type[intr_type].is_intr_info[xx]; - if ((this_mir = this_ir & intr_info->sd_bits)) { - /* Disable owned interrupts, call handler */ - handled++; - write_ireg(soft, intr_info->sd_bits, IOC4_W_IEC, - intr_type); - intr_info->sd_intr(intr_info->sd_info, this_mir); - this_ir &= ~this_mir; - } - } - } -#ifdef DEBUG_INTERRUPTS - { - struct ioc4_misc_regs __iomem *mem = soft->is_ioc4_misc_addr; - unsigned long flag; - - spin_lock_irqsave(&soft->is_ir_lock, flag); - printk ("%s : %d : mem 0x%p sio_ir 0x%x sio_ies 0x%x " - "other_ir 0x%x other_ies 0x%x mask 0x%x\n", - __func__, __LINE__, - (void *)mem, readl(&mem->sio_ir.raw), - readl(&mem->sio_ies.raw), - readl(&mem->other_ir.raw), - readl(&mem->other_ies.raw), - IOC4_OTHER_IR_ATA_INT | IOC4_OTHER_IR_ATA_MEMERR); - spin_unlock_irqrestore(&soft->is_ir_lock, flag); - } -#endif - return handled ? IRQ_HANDLED : IRQ_NONE; -} - -/** - * ioc4_attach_local - Device initialization. - * Called at *_attach() time for each - * IOC4 with serial ports in the system. - * @idd: Master module data for this IOC4 - */ -static int inline ioc4_attach_local(struct ioc4_driver_data *idd) -{ - struct ioc4_port *port; - struct ioc4_port *ports[IOC4_NUM_SERIAL_PORTS]; - int port_number; - uint16_t ioc4_revid_min = 62; - uint16_t ioc4_revid; - struct pci_dev *pdev = idd->idd_pdev; - struct ioc4_control* control = idd->idd_serial_data; - struct ioc4_soft *soft = control->ic_soft; - void __iomem *ioc4_misc = idd->idd_misc_regs; - void __iomem *ioc4_serial = soft->is_ioc4_serial_addr; - - /* IOC4 firmware must be at least rev 62 */ - pci_read_config_word(pdev, PCI_COMMAND_SPECIAL, &ioc4_revid); - - printk(KERN_INFO "IOC4 firmware revision %d\n", ioc4_revid); - if (ioc4_revid < ioc4_revid_min) { - printk(KERN_WARNING - "IOC4 serial not supported on firmware rev %d, " - "please upgrade to rev %d or higher\n", - ioc4_revid, ioc4_revid_min); - return -EPERM; - } - BUG_ON(ioc4_misc == NULL); - BUG_ON(ioc4_serial == NULL); - - /* Create port structures for each port */ - for (port_number = 0; port_number < IOC4_NUM_SERIAL_PORTS; - port_number++) { - port = kzalloc(sizeof(struct ioc4_port), GFP_KERNEL); - if (!port) { - printk(KERN_WARNING - "IOC4 serial memory not available for port\n"); - return -ENOMEM; - } - spin_lock_init(&port->ip_lock); - - /* we need to remember the previous ones, to point back to - * them farther down - setting up the ring buffers. - */ - ports[port_number] = port; - - /* Allocate buffers and jumpstart the hardware. */ - control->ic_port[port_number].icp_port = port; - port->ip_ioc4_soft = soft; - port->ip_pdev = pdev; - port->ip_ienb = 0; - /* Use baud rate calculations based on detected PCI - * bus speed. Simply test whether the PCI clock is - * running closer to 66MHz or 33MHz. - */ - if (idd->count_period/IOC4_EXTINT_COUNT_DIVISOR < 20) { - port->ip_pci_bus_speed = IOC4_SER_XIN_CLK_66; - } else { - port->ip_pci_bus_speed = IOC4_SER_XIN_CLK_33; - } - port->ip_baud = 9600; - port->ip_control = control; - port->ip_mem = ioc4_misc; - port->ip_serial = ioc4_serial; - - /* point to the right hook */ - port->ip_hooks = &hooks_array[port_number]; - - /* Get direct hooks to the serial regs and uart regs - * for this port - */ - switch (port_number) { - case 0: - port->ip_serial_regs = &(port->ip_serial->port_0); - port->ip_uart_regs = &(port->ip_serial->uart_0); - break; - case 1: - port->ip_serial_regs = &(port->ip_serial->port_1); - port->ip_uart_regs = &(port->ip_serial->uart_1); - break; - case 2: - port->ip_serial_regs = &(port->ip_serial->port_2); - port->ip_uart_regs = &(port->ip_serial->uart_2); - break; - default: - case 3: - port->ip_serial_regs = &(port->ip_serial->port_3); - port->ip_uart_regs = &(port->ip_serial->uart_3); - break; - } - - /* ring buffers are 1 to a pair of ports */ - if (port_number && (port_number & 1)) { - /* odd use the evens buffer */ - port->ip_dma_ringbuf = - ports[port_number - 1]->ip_dma_ringbuf; - port->ip_cpu_ringbuf = - ports[port_number - 1]->ip_cpu_ringbuf; - port->ip_inring = RING(port, RX_1_OR_3); - port->ip_outring = RING(port, TX_1_OR_3); - - } else { - if (port->ip_dma_ringbuf == 0) { - port->ip_cpu_ringbuf = pci_alloc_consistent - (pdev, TOTAL_RING_BUF_SIZE, - &port->ip_dma_ringbuf); - - } - BUG_ON(!((((int64_t)port->ip_dma_ringbuf) & - (TOTAL_RING_BUF_SIZE - 1)) == 0)); - DPRINT_CONFIG(("%s : ip_cpu_ringbuf 0x%p " - "ip_dma_ringbuf 0x%p\n", - __func__, - (void *)port->ip_cpu_ringbuf, - (void *)port->ip_dma_ringbuf)); - port->ip_inring = RING(port, RX_0_OR_2); - port->ip_outring = RING(port, TX_0_OR_2); - } - DPRINT_CONFIG(("%s : port %d [addr 0x%p] control 0x%p", - __func__, - port_number, (void *)port, (void *)control)); - DPRINT_CONFIG((" ip_serial_regs 0x%p ip_uart_regs 0x%p\n", - (void *)port->ip_serial_regs, - (void *)port->ip_uart_regs)); - - /* Initialize the hardware for IOC4 */ - port_init(port); - - DPRINT_CONFIG(("%s: port_number %d port 0x%p inring 0x%p " - "outring 0x%p\n", - __func__, - port_number, (void *)port, - (void *)port->ip_inring, - (void *)port->ip_outring)); - - /* Attach interrupt handlers */ - intr_connect(soft, IOC4_SIO_INTR_TYPE, - GET_SIO_IR(port_number), - handle_intr, port); - - intr_connect(soft, IOC4_OTHER_INTR_TYPE, - GET_OTHER_IR(port_number), - handle_dma_error_intr, port); - } - return 0; -} - -/** - * enable_intrs - enable interrupts - * @port: port to enable - * @mask: mask to use - */ -static void enable_intrs(struct ioc4_port *port, uint32_t mask) -{ - struct hooks *hooks = port->ip_hooks; - - if ((port->ip_ienb & mask) != mask) { - write_ireg(port->ip_ioc4_soft, mask, IOC4_W_IES, - IOC4_SIO_INTR_TYPE); - port->ip_ienb |= mask; - } - - if (port->ip_ienb) - write_ireg(port->ip_ioc4_soft, hooks->intr_dma_error, - IOC4_W_IES, IOC4_OTHER_INTR_TYPE); -} - -/** - * local_open - local open a port - * @port: port to open - */ -static inline int local_open(struct ioc4_port *port) -{ - int spiniter = 0; - - port->ip_flags = PORT_ACTIVE; - - /* Pause the DMA interface if necessary */ - if (port->ip_sscr & IOC4_SSCR_DMA_EN) { - writel(port->ip_sscr | IOC4_SSCR_DMA_PAUSE, - &port->ip_serial_regs->sscr); - while((readl(&port->ip_serial_regs-> sscr) - & IOC4_SSCR_PAUSE_STATE) == 0) { - spiniter++; - if (spiniter > MAXITER) { - port->ip_flags = PORT_INACTIVE; - return -1; - } - } - } - - /* Reset the input fifo. If the uart received chars while the port - * was closed and DMA is not enabled, the uart may have a bunch of - * chars hanging around in its rx fifo which will not be discarded - * by rclr in the upper layer. We must get rid of them here. - */ - writeb(UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR, - &port->ip_uart_regs->i4u_fcr); - - writeb(UART_LCR_WLEN8, &port->ip_uart_regs->i4u_lcr); - /* UART_LCR_STOP == 1 stop */ - - /* Re-enable DMA, set default threshold to intr whenever there is - * data available. - */ - port->ip_sscr &= ~IOC4_SSCR_RX_THRESHOLD; - port->ip_sscr |= 1; /* default threshold */ - - /* Plug in the new sscr. This implicitly clears the DMA_PAUSE - * flag if it was set above - */ - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - port->ip_tx_lowat = 1; - return 0; -} - -/** - * set_rx_timeout - Set rx timeout and threshold values. - * @port: port to use - * @timeout: timeout value in ticks - */ -static inline int set_rx_timeout(struct ioc4_port *port, int timeout) -{ - int threshold; - - port->ip_rx_timeout = timeout; - - /* Timeout is in ticks. Let's figure out how many chars we - * can receive at the current baud rate in that interval - * and set the rx threshold to that amount. There are 4 chars - * per ring entry, so we'll divide the number of chars that will - * arrive in timeout by 4. - * So .... timeout * baud / 10 / HZ / 4, with HZ = 100. - */ - threshold = timeout * port->ip_baud / 4000; - if (threshold == 0) - threshold = 1; /* otherwise we'll intr all the time! */ - - if ((unsigned)threshold > (unsigned)IOC4_SSCR_RX_THRESHOLD) - return 1; - - port->ip_sscr &= ~IOC4_SSCR_RX_THRESHOLD; - port->ip_sscr |= threshold; - - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - - /* Now set the rx timeout to the given value - * again timeout * IOC4_SRTR_HZ / HZ - */ - timeout = timeout * IOC4_SRTR_HZ / 100; - if (timeout > IOC4_SRTR_CNT) - timeout = IOC4_SRTR_CNT; - - writel(timeout, &port->ip_serial_regs->srtr); - return 0; -} - -/** - * config_port - config the hardware - * @port: port to config - * @baud: baud rate for the port - * @byte_size: data size - * @stop_bits: number of stop bits - * @parenb: parity enable ? - * @parodd: odd parity ? - */ -static inline int -config_port(struct ioc4_port *port, - int baud, int byte_size, int stop_bits, int parenb, int parodd) -{ - char lcr, sizebits; - int spiniter = 0; - - DPRINT_CONFIG(("%s: baud %d byte_size %d stop %d parenb %d parodd %d\n", - __func__, baud, byte_size, stop_bits, parenb, parodd)); - - if (set_baud(port, baud)) - return 1; - - switch (byte_size) { - case 5: - sizebits = UART_LCR_WLEN5; - break; - case 6: - sizebits = UART_LCR_WLEN6; - break; - case 7: - sizebits = UART_LCR_WLEN7; - break; - case 8: - sizebits = UART_LCR_WLEN8; - break; - default: - return 1; - } - - /* Pause the DMA interface if necessary */ - if (port->ip_sscr & IOC4_SSCR_DMA_EN) { - writel(port->ip_sscr | IOC4_SSCR_DMA_PAUSE, - &port->ip_serial_regs->sscr); - while((readl(&port->ip_serial_regs->sscr) - & IOC4_SSCR_PAUSE_STATE) == 0) { - spiniter++; - if (spiniter > MAXITER) - return -1; - } - } - - /* Clear relevant fields in lcr */ - lcr = readb(&port->ip_uart_regs->i4u_lcr); - lcr &= ~(LCR_MASK_BITS_CHAR | UART_LCR_EPAR | - UART_LCR_PARITY | LCR_MASK_STOP_BITS); - - /* Set byte size in lcr */ - lcr |= sizebits; - - /* Set parity */ - if (parenb) { - lcr |= UART_LCR_PARITY; - if (!parodd) - lcr |= UART_LCR_EPAR; - } - - /* Set stop bits */ - if (stop_bits) - lcr |= UART_LCR_STOP /* 2 stop bits */ ; - - writeb(lcr, &port->ip_uart_regs->i4u_lcr); - - /* Re-enable the DMA interface if necessary */ - if (port->ip_sscr & IOC4_SSCR_DMA_EN) { - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - } - port->ip_baud = baud; - - /* When we get within this number of ring entries of filling the - * entire ring on tx, place an EXPLICIT intr to generate a lowat - * notification when output has drained. - */ - port->ip_tx_lowat = (TX_LOWAT_CHARS(baud) + 3) / 4; - if (port->ip_tx_lowat == 0) - port->ip_tx_lowat = 1; - - set_rx_timeout(port, 2); - - return 0; -} - -/** - * do_write - Write bytes to the port. Returns the number of bytes - * actually written. Called from transmit_chars - * @port: port to use - * @buf: the stuff to write - * @len: how many bytes in 'buf' - */ -static inline int do_write(struct ioc4_port *port, char *buf, int len) -{ - int prod_ptr, cons_ptr, total = 0; - struct ring *outring; - struct ring_entry *entry; - struct hooks *hooks = port->ip_hooks; - - BUG_ON(!(len >= 0)); - - prod_ptr = port->ip_tx_prod; - cons_ptr = readl(&port->ip_serial_regs->stcir) & PROD_CONS_MASK; - outring = port->ip_outring; - - /* Maintain a 1-entry red-zone. The ring buffer is full when - * (cons - prod) % ring_size is 1. Rather than do this subtraction - * in the body of the loop, I'll do it now. - */ - cons_ptr = (cons_ptr - (int)sizeof(struct ring_entry)) & PROD_CONS_MASK; - - /* Stuff the bytes into the output */ - while ((prod_ptr != cons_ptr) && (len > 0)) { - int xx; - - /* Get 4 bytes (one ring entry) at a time */ - entry = (struct ring_entry *)((caddr_t) outring + prod_ptr); - - /* Invalidate all entries */ - entry->ring_allsc = 0; - - /* Copy in some bytes */ - for (xx = 0; (xx < 4) && (len > 0); xx++) { - entry->ring_data[xx] = *buf++; - entry->ring_sc[xx] = IOC4_TXCB_VALID; - len--; - total++; - } - - /* If we are within some small threshold of filling up the - * entire ring buffer, we must place an EXPLICIT intr here - * to generate a lowat interrupt in case we subsequently - * really do fill up the ring and the caller goes to sleep. - * No need to place more than one though. - */ - if (!(port->ip_flags & LOWAT_WRITTEN) && - ((cons_ptr - prod_ptr) & PROD_CONS_MASK) - <= port->ip_tx_lowat - * (int)sizeof(struct ring_entry)) { - port->ip_flags |= LOWAT_WRITTEN; - entry->ring_sc[0] |= IOC4_TXCB_INT_WHEN_DONE; - } - - /* Go on to next entry */ - prod_ptr += sizeof(struct ring_entry); - prod_ptr &= PROD_CONS_MASK; - } - - /* If we sent something, start DMA if necessary */ - if (total > 0 && !(port->ip_sscr & IOC4_SSCR_DMA_EN)) { - port->ip_sscr |= IOC4_SSCR_DMA_EN; - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - } - - /* Store the new producer pointer. If tx is disabled, we stuff the - * data into the ring buffer, but we don't actually start tx. - */ - if (!uart_tx_stopped(port->ip_port)) { - writel(prod_ptr, &port->ip_serial_regs->stpir); - - /* If we are now transmitting, enable tx_mt interrupt so we - * can disable DMA if necessary when the tx finishes. - */ - if (total > 0) - enable_intrs(port, hooks->intr_tx_mt); - } - port->ip_tx_prod = prod_ptr; - return total; -} - -/** - * disable_intrs - disable interrupts - * @port: port to enable - * @mask: mask to use - */ -static void disable_intrs(struct ioc4_port *port, uint32_t mask) -{ - struct hooks *hooks = port->ip_hooks; - - if (port->ip_ienb & mask) { - write_ireg(port->ip_ioc4_soft, mask, IOC4_W_IEC, - IOC4_SIO_INTR_TYPE); - port->ip_ienb &= ~mask; - } - - if (!port->ip_ienb) - write_ireg(port->ip_ioc4_soft, hooks->intr_dma_error, - IOC4_W_IEC, IOC4_OTHER_INTR_TYPE); -} - -/** - * set_notification - Modify event notification - * @port: port to use - * @mask: events mask - * @set_on: set ? - */ -static int set_notification(struct ioc4_port *port, int mask, int set_on) -{ - struct hooks *hooks = port->ip_hooks; - uint32_t intrbits, sscrbits; - - BUG_ON(!mask); - - intrbits = sscrbits = 0; - - if (mask & N_DATA_READY) - intrbits |= (hooks->intr_rx_timer | hooks->intr_rx_high); - if (mask & N_OUTPUT_LOWAT) - intrbits |= hooks->intr_tx_explicit; - if (mask & N_DDCD) { - intrbits |= hooks->intr_delta_dcd; - sscrbits |= IOC4_SSCR_RX_RING_DCD; - } - if (mask & N_DCTS) - intrbits |= hooks->intr_delta_cts; - - if (set_on) { - enable_intrs(port, intrbits); - port->ip_notify |= mask; - port->ip_sscr |= sscrbits; - } else { - disable_intrs(port, intrbits); - port->ip_notify &= ~mask; - port->ip_sscr &= ~sscrbits; - } - - /* We require DMA if either DATA_READY or DDCD notification is - * currently requested. If neither of these is requested and - * there is currently no tx in progress, DMA may be disabled. - */ - if (port->ip_notify & (N_DATA_READY | N_DDCD)) - port->ip_sscr |= IOC4_SSCR_DMA_EN; - else if (!(port->ip_ienb & hooks->intr_tx_mt)) - port->ip_sscr &= ~IOC4_SSCR_DMA_EN; - - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - return 0; -} - -/** - * set_mcr - set the master control reg - * @the_port: port to use - * @mask1: mcr mask - * @mask2: shadow mask - */ -static inline int set_mcr(struct uart_port *the_port, - int mask1, int mask2) -{ - struct ioc4_port *port = get_ioc4_port(the_port, 0); - uint32_t shadow; - int spiniter = 0; - char mcr; - - if (!port) - return -1; - - /* Pause the DMA interface if necessary */ - if (port->ip_sscr & IOC4_SSCR_DMA_EN) { - writel(port->ip_sscr | IOC4_SSCR_DMA_PAUSE, - &port->ip_serial_regs->sscr); - while ((readl(&port->ip_serial_regs->sscr) - & IOC4_SSCR_PAUSE_STATE) == 0) { - spiniter++; - if (spiniter > MAXITER) - return -1; - } - } - shadow = readl(&port->ip_serial_regs->shadow); - mcr = (shadow & 0xff000000) >> 24; - - /* Set new value */ - mcr |= mask1; - shadow |= mask2; - - writeb(mcr, &port->ip_uart_regs->i4u_mcr); - writel(shadow, &port->ip_serial_regs->shadow); - - /* Re-enable the DMA interface if necessary */ - if (port->ip_sscr & IOC4_SSCR_DMA_EN) { - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - } - return 0; -} - -/** - * ioc4_set_proto - set the protocol for the port - * @port: port to use - * @proto: protocol to use - */ -static int ioc4_set_proto(struct ioc4_port *port, int proto) -{ - struct hooks *hooks = port->ip_hooks; - - switch (proto) { - case PROTO_RS232: - /* Clear the appropriate GIO pin */ - writel(0, (&port->ip_mem->gppr[hooks->rs422_select_pin].raw)); - break; - - case PROTO_RS422: - /* Set the appropriate GIO pin */ - writel(1, (&port->ip_mem->gppr[hooks->rs422_select_pin].raw)); - break; - - default: - return 1; - } - return 0; -} - -/** - * transmit_chars - upper level write, called with ip_lock - * @the_port: port to write - */ -static void transmit_chars(struct uart_port *the_port) -{ - int xmit_count, tail, head; - int result; - char *start; - struct tty_struct *tty; - struct ioc4_port *port = get_ioc4_port(the_port, 0); - struct uart_state *state; - - if (!the_port) - return; - if (!port) - return; - - state = the_port->state; - tty = state->port.tty; - - if (uart_circ_empty(&state->xmit) || uart_tx_stopped(the_port)) { - /* Nothing to do or hw stopped */ - set_notification(port, N_ALL_OUTPUT, 0); - return; - } - - head = state->xmit.head; - tail = state->xmit.tail; - start = (char *)&state->xmit.buf[tail]; - - /* write out all the data or until the end of the buffer */ - xmit_count = (head < tail) ? (UART_XMIT_SIZE - tail) : (head - tail); - if (xmit_count > 0) { - result = do_write(port, start, xmit_count); - if (result > 0) { - /* booking */ - xmit_count -= result; - the_port->icount.tx += result; - /* advance the pointers */ - tail += result; - tail &= UART_XMIT_SIZE - 1; - state->xmit.tail = tail; - start = (char *)&state->xmit.buf[tail]; - } - } - if (uart_circ_chars_pending(&state->xmit) < WAKEUP_CHARS) - uart_write_wakeup(the_port); - - if (uart_circ_empty(&state->xmit)) { - set_notification(port, N_OUTPUT_LOWAT, 0); - } else { - set_notification(port, N_OUTPUT_LOWAT, 1); - } -} - -/** - * ioc4_change_speed - change the speed of the port - * @the_port: port to change - * @new_termios: new termios settings - * @old_termios: old termios settings - */ -static void -ioc4_change_speed(struct uart_port *the_port, - struct ktermios *new_termios, struct ktermios *old_termios) -{ - struct ioc4_port *port = get_ioc4_port(the_port, 0); - int baud, bits; - unsigned cflag, iflag; - int new_parity = 0, new_parity_enable = 0, new_stop = 0, new_data = 8; - struct uart_state *state = the_port->state; - - cflag = new_termios->c_cflag; - iflag = new_termios->c_iflag; - - switch (cflag & CSIZE) { - case CS5: - new_data = 5; - bits = 7; - break; - case CS6: - new_data = 6; - bits = 8; - break; - case CS7: - new_data = 7; - bits = 9; - break; - case CS8: - new_data = 8; - bits = 10; - break; - default: - /* cuz we always need a default ... */ - new_data = 5; - bits = 7; - break; - } - if (cflag & CSTOPB) { - bits++; - new_stop = 1; - } - if (cflag & PARENB) { - bits++; - new_parity_enable = 1; - if (cflag & PARODD) - new_parity = 1; - } - baud = uart_get_baud_rate(the_port, new_termios, old_termios, - MIN_BAUD_SUPPORTED, MAX_BAUD_SUPPORTED); - DPRINT_CONFIG(("%s: returned baud %d\n", __func__, baud)); - - /* default is 9600 */ - if (!baud) - baud = 9600; - - if (!the_port->fifosize) - the_port->fifosize = IOC4_FIFO_CHARS; - the_port->timeout = ((the_port->fifosize * HZ * bits) / (baud / 10)); - the_port->timeout += HZ / 50; /* Add .02 seconds of slop */ - - the_port->ignore_status_mask = N_ALL_INPUT; - - state->port.tty->low_latency = 1; - - if (iflag & IGNPAR) - the_port->ignore_status_mask &= ~(N_PARITY_ERROR - | N_FRAMING_ERROR); - if (iflag & IGNBRK) { - the_port->ignore_status_mask &= ~N_BREAK; - if (iflag & IGNPAR) - the_port->ignore_status_mask &= ~N_OVERRUN_ERROR; - } - if (!(cflag & CREAD)) { - /* ignore everything */ - the_port->ignore_status_mask &= ~N_DATA_READY; - } - - if (cflag & CRTSCTS) { - port->ip_sscr |= IOC4_SSCR_HFC_EN; - } - else { - port->ip_sscr &= ~IOC4_SSCR_HFC_EN; - } - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - - /* Set the configuration and proper notification call */ - DPRINT_CONFIG(("%s : port 0x%p cflag 0%o " - "config_port(baud %d data %d stop %d p enable %d parity %d)," - " notification 0x%x\n", - __func__, (void *)port, cflag, baud, new_data, new_stop, - new_parity_enable, new_parity, the_port->ignore_status_mask)); - - if ((config_port(port, baud, /* baud */ - new_data, /* byte size */ - new_stop, /* stop bits */ - new_parity_enable, /* set parity */ - new_parity)) >= 0) { /* parity 1==odd */ - set_notification(port, the_port->ignore_status_mask, 1); - } -} - -/** - * ic4_startup_local - Start up the serial port - returns >= 0 if no errors - * @the_port: Port to operate on - */ -static inline int ic4_startup_local(struct uart_port *the_port) -{ - struct ioc4_port *port; - struct uart_state *state; - - if (!the_port) - return -1; - - port = get_ioc4_port(the_port, 0); - if (!port) - return -1; - - state = the_port->state; - - local_open(port); - - /* set the protocol - mapbase has the port type */ - ioc4_set_proto(port, the_port->mapbase); - - /* set the speed of the serial port */ - ioc4_change_speed(the_port, state->port.tty->termios, - (struct ktermios *)0); - - return 0; -} - -/* - * ioc4_cb_output_lowat - called when the output low water mark is hit - * @the_port: port to output - */ -static void ioc4_cb_output_lowat(struct uart_port *the_port) -{ - unsigned long pflags; - - /* ip_lock is set on the call here */ - if (the_port) { - spin_lock_irqsave(&the_port->lock, pflags); - transmit_chars(the_port); - spin_unlock_irqrestore(&the_port->lock, pflags); - } -} - -/** - * handle_intr - service any interrupts for the given port - 2nd level - * called via sd_intr - * @arg: handler arg - * @sio_ir: ioc4regs - */ -static void handle_intr(void *arg, uint32_t sio_ir) -{ - struct ioc4_port *port = (struct ioc4_port *)arg; - struct hooks *hooks = port->ip_hooks; - unsigned int rx_high_rd_aborted = 0; - unsigned long flags; - struct uart_port *the_port; - int loop_counter; - - /* Possible race condition here: The tx_mt interrupt bit may be - * cleared without the intervention of the interrupt handler, - * e.g. by a write. If the top level interrupt handler reads a - * tx_mt, then some other processor does a write, starting up - * output, then we come in here, see the tx_mt and stop DMA, the - * output started by the other processor will hang. Thus we can - * only rely on tx_mt being legitimate if it is read while the - * port lock is held. Therefore this bit must be ignored in the - * passed in interrupt mask which was read by the top level - * interrupt handler since the port lock was not held at the time - * it was read. We can only rely on this bit being accurate if it - * is read while the port lock is held. So we'll clear it for now, - * and reload it later once we have the port lock. - */ - sio_ir &= ~(hooks->intr_tx_mt); - - spin_lock_irqsave(&port->ip_lock, flags); - - loop_counter = MAXITER; /* to avoid hangs */ - - do { - uint32_t shadow; - - if ( loop_counter-- <= 0 ) { - printk(KERN_WARNING "IOC4 serial: " - "possible hang condition/" - "port stuck on interrupt.\n"); - break; - } - - /* Handle a DCD change */ - if (sio_ir & hooks->intr_delta_dcd) { - /* ACK the interrupt */ - writel(hooks->intr_delta_dcd, - &port->ip_mem->sio_ir.raw); - - shadow = readl(&port->ip_serial_regs->shadow); - - if ((port->ip_notify & N_DDCD) - && (shadow & IOC4_SHADOW_DCD) - && (port->ip_port)) { - the_port = port->ip_port; - the_port->icount.dcd = 1; - wake_up_interruptible - (&the_port->state->port.delta_msr_wait); - } else if ((port->ip_notify & N_DDCD) - && !(shadow & IOC4_SHADOW_DCD)) { - /* Flag delta DCD/no DCD */ - port->ip_flags |= DCD_ON; - } - } - - /* Handle a CTS change */ - if (sio_ir & hooks->intr_delta_cts) { - /* ACK the interrupt */ - writel(hooks->intr_delta_cts, - &port->ip_mem->sio_ir.raw); - - shadow = readl(&port->ip_serial_regs->shadow); - - if ((port->ip_notify & N_DCTS) - && (port->ip_port)) { - the_port = port->ip_port; - the_port->icount.cts = - (shadow & IOC4_SHADOW_CTS) ? 1 : 0; - wake_up_interruptible - (&the_port->state->port.delta_msr_wait); - } - } - - /* rx timeout interrupt. Must be some data available. Put this - * before the check for rx_high since servicing this condition - * may cause that condition to clear. - */ - if (sio_ir & hooks->intr_rx_timer) { - /* ACK the interrupt */ - writel(hooks->intr_rx_timer, - &port->ip_mem->sio_ir.raw); - - if ((port->ip_notify & N_DATA_READY) - && (port->ip_port)) { - /* ip_lock is set on call here */ - receive_chars(port->ip_port); - } - } - - /* rx high interrupt. Must be after rx_timer. */ - else if (sio_ir & hooks->intr_rx_high) { - /* Data available, notify upper layer */ - if ((port->ip_notify & N_DATA_READY) - && port->ip_port) { - /* ip_lock is set on call here */ - receive_chars(port->ip_port); - } - - /* We can't ACK this interrupt. If receive_chars didn't - * cause the condition to clear, we'll have to disable - * the interrupt until the data is drained. - * If the read was aborted, don't disable the interrupt - * as this may cause us to hang indefinitely. An - * aborted read generally means that this interrupt - * hasn't been delivered to the cpu yet anyway, even - * though we see it as asserted when we read the sio_ir. - */ - if ((sio_ir = PENDING(port)) & hooks->intr_rx_high) { - if ((port->ip_flags & READ_ABORTED) == 0) { - port->ip_ienb &= ~hooks->intr_rx_high; - port->ip_flags |= INPUT_HIGH; - } else { - rx_high_rd_aborted++; - } - } - } - - /* We got a low water interrupt: notify upper layer to - * send more data. Must come before tx_mt since servicing - * this condition may cause that condition to clear. - */ - if (sio_ir & hooks->intr_tx_explicit) { - port->ip_flags &= ~LOWAT_WRITTEN; - - /* ACK the interrupt */ - writel(hooks->intr_tx_explicit, - &port->ip_mem->sio_ir.raw); - - if (port->ip_notify & N_OUTPUT_LOWAT) - ioc4_cb_output_lowat(port->ip_port); - } - - /* Handle tx_mt. Must come after tx_explicit. */ - else if (sio_ir & hooks->intr_tx_mt) { - /* If we are expecting a lowat notification - * and we get to this point it probably means that for - * some reason the tx_explicit didn't work as expected - * (that can legitimately happen if the output buffer is - * filled up in just the right way). - * So send the notification now. - */ - if (port->ip_notify & N_OUTPUT_LOWAT) { - ioc4_cb_output_lowat(port->ip_port); - - /* We need to reload the sio_ir since the lowat - * call may have caused another write to occur, - * clearing the tx_mt condition. - */ - sio_ir = PENDING(port); - } - - /* If the tx_mt condition still persists even after the - * lowat call, we've got some work to do. - */ - if (sio_ir & hooks->intr_tx_mt) { - - /* If we are not currently expecting DMA input, - * and the transmitter has just gone idle, - * there is no longer any reason for DMA, so - * disable it. - */ - if (!(port->ip_notify - & (N_DATA_READY | N_DDCD))) { - BUG_ON(!(port->ip_sscr - & IOC4_SSCR_DMA_EN)); - port->ip_sscr &= ~IOC4_SSCR_DMA_EN; - writel(port->ip_sscr, - &port->ip_serial_regs->sscr); - } - - /* Prevent infinite tx_mt interrupt */ - port->ip_ienb &= ~hooks->intr_tx_mt; - } - } - sio_ir = PENDING(port); - - /* if the read was aborted and only hooks->intr_rx_high, - * clear hooks->intr_rx_high, so we do not loop forever. - */ - - if (rx_high_rd_aborted && (sio_ir == hooks->intr_rx_high)) { - sio_ir &= ~hooks->intr_rx_high; - } - } while (sio_ir & hooks->intr_all); - - spin_unlock_irqrestore(&port->ip_lock, flags); - - /* Re-enable interrupts before returning from interrupt handler. - * Getting interrupted here is okay. It'll just v() our semaphore, and - * we'll come through the loop again. - */ - - write_ireg(port->ip_ioc4_soft, port->ip_ienb, IOC4_W_IES, - IOC4_SIO_INTR_TYPE); -} - -/* - * ioc4_cb_post_ncs - called for some basic errors - * @port: port to use - * @ncs: event - */ -static void ioc4_cb_post_ncs(struct uart_port *the_port, int ncs) -{ - struct uart_icount *icount; - - icount = &the_port->icount; - - if (ncs & NCS_BREAK) - icount->brk++; - if (ncs & NCS_FRAMING) - icount->frame++; - if (ncs & NCS_OVERRUN) - icount->overrun++; - if (ncs & NCS_PARITY) - icount->parity++; -} - -/** - * do_read - Read in bytes from the port. Return the number of bytes - * actually read. - * @the_port: port to use - * @buf: place to put the stuff we read - * @len: how big 'buf' is - */ - -static inline int do_read(struct uart_port *the_port, unsigned char *buf, - int len) -{ - int prod_ptr, cons_ptr, total; - struct ioc4_port *port = get_ioc4_port(the_port, 0); - struct ring *inring; - struct ring_entry *entry; - struct hooks *hooks = port->ip_hooks; - int byte_num; - char *sc; - int loop_counter; - - BUG_ON(!(len >= 0)); - BUG_ON(!port); - - /* There is a nasty timing issue in the IOC4. When the rx_timer - * expires or the rx_high condition arises, we take an interrupt. - * At some point while servicing the interrupt, we read bytes from - * the ring buffer and re-arm the rx_timer. However the rx_timer is - * not started until the first byte is received *after* it is armed, - * and any bytes pending in the rx construction buffers are not drained - * to memory until either there are 4 bytes available or the rx_timer - * expires. This leads to a potential situation where data is left - * in the construction buffers forever - 1 to 3 bytes were received - * after the interrupt was generated but before the rx_timer was - * re-armed. At that point as long as no subsequent bytes are received - * the timer will never be started and the bytes will remain in the - * construction buffer forever. The solution is to execute a DRAIN - * command after rearming the timer. This way any bytes received before - * the DRAIN will be drained to memory, and any bytes received after - * the DRAIN will start the TIMER and be drained when it expires. - * Luckily, this only needs to be done when the DMA buffer is empty - * since there is no requirement that this function return all - * available data as long as it returns some. - */ - /* Re-arm the timer */ - writel(port->ip_rx_cons | IOC4_SRCIR_ARM, &port->ip_serial_regs->srcir); - - prod_ptr = readl(&port->ip_serial_regs->srpir) & PROD_CONS_MASK; - cons_ptr = port->ip_rx_cons; - - if (prod_ptr == cons_ptr) { - int reset_dma = 0; - - /* Input buffer appears empty, do a flush. */ - - /* DMA must be enabled for this to work. */ - if (!(port->ip_sscr & IOC4_SSCR_DMA_EN)) { - port->ip_sscr |= IOC4_SSCR_DMA_EN; - reset_dma = 1; - } - - /* Potential race condition: we must reload the srpir after - * issuing the drain command, otherwise we could think the rx - * buffer is empty, then take a very long interrupt, and when - * we come back it's full and we wait forever for the drain to - * complete. - */ - writel(port->ip_sscr | IOC4_SSCR_RX_DRAIN, - &port->ip_serial_regs->sscr); - prod_ptr = readl(&port->ip_serial_regs->srpir) - & PROD_CONS_MASK; - - /* We must not wait for the DRAIN to complete unless there are - * at least 8 bytes (2 ring entries) available to receive the - * data otherwise the DRAIN will never complete and we'll - * deadlock here. - * In fact, to make things easier, I'll just ignore the flush if - * there is any data at all now available. - */ - if (prod_ptr == cons_ptr) { - loop_counter = 0; - while (readl(&port->ip_serial_regs->sscr) & - IOC4_SSCR_RX_DRAIN) { - loop_counter++; - if (loop_counter > MAXITER) - return -1; - } - - /* SIGH. We have to reload the prod_ptr *again* since - * the drain may have caused it to change - */ - prod_ptr = readl(&port->ip_serial_regs->srpir) - & PROD_CONS_MASK; - } - if (reset_dma) { - port->ip_sscr &= ~IOC4_SSCR_DMA_EN; - writel(port->ip_sscr, &port->ip_serial_regs->sscr); - } - } - inring = port->ip_inring; - port->ip_flags &= ~READ_ABORTED; - - total = 0; - loop_counter = 0xfffff; /* to avoid hangs */ - - /* Grab bytes from the hardware */ - while ((prod_ptr != cons_ptr) && (len > 0)) { - entry = (struct ring_entry *)((caddr_t)inring + cons_ptr); - - if ( loop_counter-- <= 0 ) { - printk(KERN_WARNING "IOC4 serial: " - "possible hang condition/" - "port stuck on read.\n"); - break; - } - - /* According to the producer pointer, this ring entry - * must contain some data. But if the PIO happened faster - * than the DMA, the data may not be available yet, so let's - * wait until it arrives. - */ - if ((entry->ring_allsc & RING_ANY_VALID) == 0) { - /* Indicate the read is aborted so we don't disable - * the interrupt thinking that the consumer is - * congested. - */ - port->ip_flags |= READ_ABORTED; - len = 0; - break; - } - - /* Load the bytes/status out of the ring entry */ - for (byte_num = 0; byte_num < 4 && len > 0; byte_num++) { - sc = &(entry->ring_sc[byte_num]); - - /* Check for change in modem state or overrun */ - if ((*sc & IOC4_RXSB_MODEM_VALID) - && (port->ip_notify & N_DDCD)) { - /* Notify upper layer if DCD dropped */ - - if ((port->ip_flags & DCD_ON) - && !(*sc & IOC4_RXSB_DCD)) { - - /* If we have already copied some data, - * return it. We'll pick up the carrier - * drop on the next pass. That way we - * don't throw away the data that has - * already been copied back to - * the caller's buffer. - */ - if (total > 0) { - len = 0; - break; - } - port->ip_flags &= ~DCD_ON; - - /* Turn off this notification so the - * carrier drop protocol won't see it - * again when it does a read. - */ - *sc &= ~IOC4_RXSB_MODEM_VALID; - - /* To keep things consistent, we need - * to update the consumer pointer so - * the next reader won't come in and - * try to read the same ring entries - * again. This must be done here before - * the dcd change. - */ - - if ((entry->ring_allsc & RING_ANY_VALID) - == 0) { - cons_ptr += (int)sizeof - (struct ring_entry); - cons_ptr &= PROD_CONS_MASK; - } - writel(cons_ptr, - &port->ip_serial_regs->srcir); - port->ip_rx_cons = cons_ptr; - - /* Notify upper layer of carrier drop */ - if ((port->ip_notify & N_DDCD) - && port->ip_port) { - the_port->icount.dcd = 0; - wake_up_interruptible - (&the_port->state-> - port.delta_msr_wait); - } - - /* If we had any data to return, we - * would have returned it above. - */ - return 0; - } - } - if (*sc & IOC4_RXSB_MODEM_VALID) { - /* Notify that an input overrun occurred */ - if ((*sc & IOC4_RXSB_OVERRUN) - && (port->ip_notify & N_OVERRUN_ERROR)) { - ioc4_cb_post_ncs(the_port, NCS_OVERRUN); - } - /* Don't look at this byte again */ - *sc &= ~IOC4_RXSB_MODEM_VALID; - } - - /* Check for valid data or RX errors */ - if ((*sc & IOC4_RXSB_DATA_VALID) && - ((*sc & (IOC4_RXSB_PAR_ERR - | IOC4_RXSB_FRAME_ERR - | IOC4_RXSB_BREAK)) - && (port->ip_notify & (N_PARITY_ERROR - | N_FRAMING_ERROR - | N_BREAK)))) { - /* There is an error condition on the next byte. - * If we have already transferred some bytes, - * we'll stop here. Otherwise if this is the - * first byte to be read, we'll just transfer - * it alone after notifying the - * upper layer of its status. - */ - if (total > 0) { - len = 0; - break; - } else { - if ((*sc & IOC4_RXSB_PAR_ERR) && - (port->ip_notify & N_PARITY_ERROR)) { - ioc4_cb_post_ncs(the_port, - NCS_PARITY); - } - if ((*sc & IOC4_RXSB_FRAME_ERR) && - (port->ip_notify & N_FRAMING_ERROR)){ - ioc4_cb_post_ncs(the_port, - NCS_FRAMING); - } - if ((*sc & IOC4_RXSB_BREAK) - && (port->ip_notify & N_BREAK)) { - ioc4_cb_post_ncs - (the_port, - NCS_BREAK); - } - len = 1; - } - } - if (*sc & IOC4_RXSB_DATA_VALID) { - *sc &= ~IOC4_RXSB_DATA_VALID; - *buf = entry->ring_data[byte_num]; - buf++; - len--; - total++; - } - } - - /* If we used up this entry entirely, go on to the next one, - * otherwise we must have run out of buffer space, so - * leave the consumer pointer here for the next read in case - * there are still unread bytes in this entry. - */ - if ((entry->ring_allsc & RING_ANY_VALID) == 0) { - cons_ptr += (int)sizeof(struct ring_entry); - cons_ptr &= PROD_CONS_MASK; - } - } - - /* Update consumer pointer and re-arm rx timer interrupt */ - writel(cons_ptr, &port->ip_serial_regs->srcir); - port->ip_rx_cons = cons_ptr; - - /* If we have now dipped below the rx high water mark and we have - * rx_high interrupt turned off, we can now turn it back on again. - */ - if ((port->ip_flags & INPUT_HIGH) && (((prod_ptr - cons_ptr) - & PROD_CONS_MASK) < ((port->ip_sscr & - IOC4_SSCR_RX_THRESHOLD) - << IOC4_PROD_CONS_PTR_OFF))) { - port->ip_flags &= ~INPUT_HIGH; - enable_intrs(port, hooks->intr_rx_high); - } - return total; -} - -/** - * receive_chars - upper level read. Called with ip_lock. - * @the_port: port to read from - */ -static void receive_chars(struct uart_port *the_port) -{ - struct tty_struct *tty; - unsigned char ch[IOC4_MAX_CHARS]; - int read_count, request_count = IOC4_MAX_CHARS; - struct uart_icount *icount; - struct uart_state *state = the_port->state; - unsigned long pflags; - - /* Make sure all the pointers are "good" ones */ - if (!state) - return; - if (!state->port.tty) - return; - - spin_lock_irqsave(&the_port->lock, pflags); - tty = state->port.tty; - - request_count = tty_buffer_request_room(tty, IOC4_MAX_CHARS); - - if (request_count > 0) { - icount = &the_port->icount; - read_count = do_read(the_port, ch, request_count); - if (read_count > 0) { - tty_insert_flip_string(tty, ch, read_count); - icount->rx += read_count; - } - } - - spin_unlock_irqrestore(&the_port->lock, pflags); - - tty_flip_buffer_push(tty); -} - -/** - * ic4_type - What type of console are we? - * @port: Port to operate with (we ignore since we only have one port) - * - */ -static const char *ic4_type(struct uart_port *the_port) -{ - if (the_port->mapbase == PROTO_RS232) - return "SGI IOC4 Serial [rs232]"; - else - return "SGI IOC4 Serial [rs422]"; -} - -/** - * ic4_tx_empty - Is the transmitter empty? - * @port: Port to operate on - * - */ -static unsigned int ic4_tx_empty(struct uart_port *the_port) -{ - struct ioc4_port *port = get_ioc4_port(the_port, 0); - unsigned int ret = 0; - - if (port_is_active(port, the_port)) { - if (readl(&port->ip_serial_regs->shadow) & IOC4_SHADOW_TEMT) - ret = TIOCSER_TEMT; - } - return ret; -} - -/** - * ic4_stop_tx - stop the transmitter - * @port: Port to operate on - * - */ -static void ic4_stop_tx(struct uart_port *the_port) -{ - struct ioc4_port *port = get_ioc4_port(the_port, 0); - - if (port_is_active(port, the_port)) - set_notification(port, N_OUTPUT_LOWAT, 0); -} - -/** - * null_void_function - - * @port: Port to operate on - * - */ -static void null_void_function(struct uart_port *the_port) -{ -} - -/** - * ic4_shutdown - shut down the port - free irq and disable - * @port: Port to shut down - * - */ -static void ic4_shutdown(struct uart_port *the_port) -{ - unsigned long port_flags; - struct ioc4_port *port; - struct uart_state *state; - - port = get_ioc4_port(the_port, 0); - if (!port) - return; - - state = the_port->state; - port->ip_port = NULL; - - wake_up_interruptible(&state->port.delta_msr_wait); - - if (state->port.tty) - set_bit(TTY_IO_ERROR, &state->port.tty->flags); - - spin_lock_irqsave(&the_port->lock, port_flags); - set_notification(port, N_ALL, 0); - port->ip_flags = PORT_INACTIVE; - spin_unlock_irqrestore(&the_port->lock, port_flags); -} - -/** - * ic4_set_mctrl - set control lines (dtr, rts, etc) - * @port: Port to operate on - * @mctrl: Lines to set/unset - * - */ -static void ic4_set_mctrl(struct uart_port *the_port, unsigned int mctrl) -{ - unsigned char mcr = 0; - struct ioc4_port *port; - - port = get_ioc4_port(the_port, 0); - if (!port_is_active(port, the_port)) - return; - - if (mctrl & TIOCM_RTS) - mcr |= UART_MCR_RTS; - if (mctrl & TIOCM_DTR) - mcr |= UART_MCR_DTR; - if (mctrl & TIOCM_OUT1) - mcr |= UART_MCR_OUT1; - if (mctrl & TIOCM_OUT2) - mcr |= UART_MCR_OUT2; - if (mctrl & TIOCM_LOOP) - mcr |= UART_MCR_LOOP; - - set_mcr(the_port, mcr, IOC4_SHADOW_DTR); -} - -/** - * ic4_get_mctrl - get control line info - * @port: port to operate on - * - */ -static unsigned int ic4_get_mctrl(struct uart_port *the_port) -{ - struct ioc4_port *port = get_ioc4_port(the_port, 0); - uint32_t shadow; - unsigned int ret = 0; - - if (!port_is_active(port, the_port)) - return 0; - - shadow = readl(&port->ip_serial_regs->shadow); - if (shadow & IOC4_SHADOW_DCD) - ret |= TIOCM_CAR; - if (shadow & IOC4_SHADOW_DR) - ret |= TIOCM_DSR; - if (shadow & IOC4_SHADOW_CTS) - ret |= TIOCM_CTS; - return ret; -} - -/** - * ic4_start_tx - Start transmitter, flush any output - * @port: Port to operate on - * - */ -static void ic4_start_tx(struct uart_port *the_port) -{ - struct ioc4_port *port = get_ioc4_port(the_port, 0); - - if (port_is_active(port, the_port)) { - set_notification(port, N_OUTPUT_LOWAT, 1); - enable_intrs(port, port->ip_hooks->intr_tx_mt); - } -} - -/** - * ic4_break_ctl - handle breaks - * @port: Port to operate on - * @break_state: Break state - * - */ -static void ic4_break_ctl(struct uart_port *the_port, int break_state) -{ -} - -/** - * ic4_startup - Start up the serial port - * @port: Port to operate on - * - */ -static int ic4_startup(struct uart_port *the_port) -{ - int retval; - struct ioc4_port *port; - struct ioc4_control *control; - struct uart_state *state; - unsigned long port_flags; - - if (!the_port) - return -ENODEV; - port = get_ioc4_port(the_port, 1); - if (!port) - return -ENODEV; - state = the_port->state; - - control = port->ip_control; - if (!control) { - port->ip_port = NULL; - return -ENODEV; - } - - /* Start up the serial port */ - spin_lock_irqsave(&the_port->lock, port_flags); - retval = ic4_startup_local(the_port); - spin_unlock_irqrestore(&the_port->lock, port_flags); - return retval; -} - -/** - * ic4_set_termios - set termios stuff - * @port: port to operate on - * @termios: New settings - * @termios: Old - * - */ -static void -ic4_set_termios(struct uart_port *the_port, - struct ktermios *termios, struct ktermios *old_termios) -{ - unsigned long port_flags; - - spin_lock_irqsave(&the_port->lock, port_flags); - ioc4_change_speed(the_port, termios, old_termios); - spin_unlock_irqrestore(&the_port->lock, port_flags); -} - -/** - * ic4_request_port - allocate resources for port - no op.... - * @port: port to operate on - * - */ -static int ic4_request_port(struct uart_port *port) -{ - return 0; -} - -/* Associate the uart functions above - given to serial core */ - -static struct uart_ops ioc4_ops = { - .tx_empty = ic4_tx_empty, - .set_mctrl = ic4_set_mctrl, - .get_mctrl = ic4_get_mctrl, - .stop_tx = ic4_stop_tx, - .start_tx = ic4_start_tx, - .stop_rx = null_void_function, - .enable_ms = null_void_function, - .break_ctl = ic4_break_ctl, - .startup = ic4_startup, - .shutdown = ic4_shutdown, - .set_termios = ic4_set_termios, - .type = ic4_type, - .release_port = null_void_function, - .request_port = ic4_request_port, -}; - -/* - * Boot-time initialization code - */ - -static struct uart_driver ioc4_uart_rs232 = { - .owner = THIS_MODULE, - .driver_name = "ioc4_serial_rs232", - .dev_name = DEVICE_NAME_RS232, - .major = DEVICE_MAJOR, - .minor = DEVICE_MINOR_RS232, - .nr = IOC4_NUM_CARDS * IOC4_NUM_SERIAL_PORTS, -}; - -static struct uart_driver ioc4_uart_rs422 = { - .owner = THIS_MODULE, - .driver_name = "ioc4_serial_rs422", - .dev_name = DEVICE_NAME_RS422, - .major = DEVICE_MAJOR, - .minor = DEVICE_MINOR_RS422, - .nr = IOC4_NUM_CARDS * IOC4_NUM_SERIAL_PORTS, -}; - - -/** - * ioc4_serial_remove_one - detach function - * - * @idd: IOC4 master module data for this IOC4 - */ - -static int ioc4_serial_remove_one(struct ioc4_driver_data *idd) -{ - int port_num, port_type; - struct ioc4_control *control; - struct uart_port *the_port; - struct ioc4_port *port; - struct ioc4_soft *soft; - - /* If serial driver did not attach, don't try to detach */ - control = idd->idd_serial_data; - if (!control) - return 0; - - for (port_num = 0; port_num < IOC4_NUM_SERIAL_PORTS; port_num++) { - for (port_type = UART_PORT_MIN; - port_type < UART_PORT_COUNT; - port_type++) { - the_port = &control->ic_port[port_num].icp_uart_port - [port_type]; - if (the_port) { - switch (port_type) { - case UART_PORT_RS422: - uart_remove_one_port(&ioc4_uart_rs422, - the_port); - break; - default: - case UART_PORT_RS232: - uart_remove_one_port(&ioc4_uart_rs232, - the_port); - break; - } - } - } - port = control->ic_port[port_num].icp_port; - /* we allocate in pairs */ - if (!(port_num & 1) && port) { - pci_free_consistent(port->ip_pdev, - TOTAL_RING_BUF_SIZE, - port->ip_cpu_ringbuf, - port->ip_dma_ringbuf); - kfree(port); - } - } - soft = control->ic_soft; - if (soft) { - free_irq(control->ic_irq, soft); - if (soft->is_ioc4_serial_addr) { - iounmap(soft->is_ioc4_serial_addr); - release_mem_region((unsigned long) - soft->is_ioc4_serial_addr, - sizeof(struct ioc4_serial)); - } - kfree(soft); - } - kfree(control); - idd->idd_serial_data = NULL; - - return 0; -} - - -/** - * ioc4_serial_core_attach_rs232 - register with serial core - * This is done during pci probing - * @pdev: handle for this card - */ -static inline int -ioc4_serial_core_attach(struct pci_dev *pdev, int port_type) -{ - struct ioc4_port *port; - struct uart_port *the_port; - struct ioc4_driver_data *idd = pci_get_drvdata(pdev); - struct ioc4_control *control = idd->idd_serial_data; - int port_num; - int port_type_idx; - struct uart_driver *u_driver; - - - DPRINT_CONFIG(("%s: attach pdev 0x%p - control 0x%p\n", - __func__, pdev, (void *)control)); - - if (!control) - return -ENODEV; - - port_type_idx = (port_type == PROTO_RS232) ? UART_PORT_RS232 - : UART_PORT_RS422; - - u_driver = (port_type == PROTO_RS232) ? &ioc4_uart_rs232 - : &ioc4_uart_rs422; - - /* once around for each port on this card */ - for (port_num = 0; port_num < IOC4_NUM_SERIAL_PORTS; port_num++) { - the_port = &control->ic_port[port_num].icp_uart_port - [port_type_idx]; - port = control->ic_port[port_num].icp_port; - port->ip_all_ports[port_type_idx] = the_port; - - DPRINT_CONFIG(("%s: attach the_port 0x%p / port 0x%p : type %s\n", - __func__, (void *)the_port, - (void *)port, - port_type == PROTO_RS232 ? "rs232" : "rs422")); - - /* membase, iobase and mapbase just need to be non-0 */ - the_port->membase = (unsigned char __iomem *)1; - the_port->iobase = (pdev->bus->number << 16) | port_num; - the_port->line = (Num_of_ioc4_cards << 2) | port_num; - the_port->mapbase = port_type; - the_port->type = PORT_16550A; - the_port->fifosize = IOC4_FIFO_CHARS; - the_port->ops = &ioc4_ops; - the_port->irq = control->ic_irq; - the_port->dev = &pdev->dev; - spin_lock_init(&the_port->lock); - if (uart_add_one_port(u_driver, the_port) < 0) { - printk(KERN_WARNING - "%s: unable to add port %d bus %d\n", - __func__, the_port->line, pdev->bus->number); - } else { - DPRINT_CONFIG( - ("IOC4 serial port %d irq = %d, bus %d\n", - the_port->line, the_port->irq, pdev->bus->number)); - } - } - return 0; -} - -/** - * ioc4_serial_attach_one - register attach function - * called per card found from IOC4 master module. - * @idd: Master module data for this IOC4 - */ -int -ioc4_serial_attach_one(struct ioc4_driver_data *idd) -{ - unsigned long tmp_addr1; - struct ioc4_serial __iomem *serial; - struct ioc4_soft *soft; - struct ioc4_control *control; - int ret = 0; - - - DPRINT_CONFIG(("%s (0x%p, 0x%p)\n", __func__, idd->idd_pdev, - idd->idd_pci_id)); - - /* PCI-RT does not bring out serial connections. - * Do not attach to this particular IOC4. - */ - if (idd->idd_variant == IOC4_VARIANT_PCI_RT) - return 0; - - /* request serial registers */ - tmp_addr1 = idd->idd_bar0 + IOC4_SERIAL_OFFSET; - - if (!request_mem_region(tmp_addr1, sizeof(struct ioc4_serial), - "sioc4_uart")) { - printk(KERN_WARNING - "ioc4 (%p): unable to get request region for " - "uart space\n", (void *)idd->idd_pdev); - ret = -ENODEV; - goto out1; - } - serial = ioremap(tmp_addr1, sizeof(struct ioc4_serial)); - if (!serial) { - printk(KERN_WARNING - "ioc4 (%p) : unable to remap ioc4 serial register\n", - (void *)idd->idd_pdev); - ret = -ENODEV; - goto out2; - } - DPRINT_CONFIG(("%s : mem 0x%p, serial 0x%p\n", - __func__, (void *)idd->idd_misc_regs, - (void *)serial)); - - /* Get memory for the new card */ - control = kzalloc(sizeof(struct ioc4_control), GFP_KERNEL); - - if (!control) { - printk(KERN_WARNING "ioc4_attach_one" - ": unable to get memory for the IOC4\n"); - ret = -ENOMEM; - goto out2; - } - idd->idd_serial_data = control; - - /* Allocate the soft structure */ - soft = kzalloc(sizeof(struct ioc4_soft), GFP_KERNEL); - if (!soft) { - printk(KERN_WARNING - "ioc4 (%p): unable to get memory for the soft struct\n", - (void *)idd->idd_pdev); - ret = -ENOMEM; - goto out3; - } - - spin_lock_init(&soft->is_ir_lock); - soft->is_ioc4_misc_addr = idd->idd_misc_regs; - soft->is_ioc4_serial_addr = serial; - - /* Init the IOC4 */ - writel(0xf << IOC4_SIO_CR_CMD_PULSE_SHIFT, - &idd->idd_misc_regs->sio_cr.raw); - - /* Enable serial port mode select generic PIO pins as outputs */ - writel(IOC4_GPCR_UART0_MODESEL | IOC4_GPCR_UART1_MODESEL - | IOC4_GPCR_UART2_MODESEL | IOC4_GPCR_UART3_MODESEL, - &idd->idd_misc_regs->gpcr_s.raw); - - /* Clear and disable all serial interrupts */ - write_ireg(soft, ~0, IOC4_W_IEC, IOC4_SIO_INTR_TYPE); - writel(~0, &idd->idd_misc_regs->sio_ir.raw); - write_ireg(soft, IOC4_OTHER_IR_SER_MEMERR, IOC4_W_IEC, - IOC4_OTHER_INTR_TYPE); - writel(IOC4_OTHER_IR_SER_MEMERR, &idd->idd_misc_regs->other_ir.raw); - control->ic_soft = soft; - - /* Hook up interrupt handler */ - if (!request_irq(idd->idd_pdev->irq, ioc4_intr, IRQF_SHARED, - "sgi-ioc4serial", soft)) { - control->ic_irq = idd->idd_pdev->irq; - } else { - printk(KERN_WARNING - "%s : request_irq fails for IRQ 0x%x\n ", - __func__, idd->idd_pdev->irq); - } - ret = ioc4_attach_local(idd); - if (ret) - goto out4; - - /* register port with the serial core - 1 rs232, 1 rs422 */ - - if ((ret = ioc4_serial_core_attach(idd->idd_pdev, PROTO_RS232))) - goto out4; - - if ((ret = ioc4_serial_core_attach(idd->idd_pdev, PROTO_RS422))) - goto out5; - - Num_of_ioc4_cards++; - - return ret; - - /* error exits that give back resources */ -out5: - ioc4_serial_remove_one(idd); -out4: - kfree(soft); -out3: - kfree(control); -out2: - if (serial) - iounmap(serial); - release_mem_region(tmp_addr1, sizeof(struct ioc4_serial)); -out1: - - return ret; -} - - -static struct ioc4_submodule ioc4_serial_submodule = { - .is_name = "IOC4_serial", - .is_owner = THIS_MODULE, - .is_probe = ioc4_serial_attach_one, - .is_remove = ioc4_serial_remove_one, -}; - -/** - * ioc4_serial_init - module init - */ -static int __init ioc4_serial_init(void) -{ - int ret; - - /* register with serial core */ - if ((ret = uart_register_driver(&ioc4_uart_rs232)) < 0) { - printk(KERN_WARNING - "%s: Couldn't register rs232 IOC4 serial driver\n", - __func__); - goto out; - } - if ((ret = uart_register_driver(&ioc4_uart_rs422)) < 0) { - printk(KERN_WARNING - "%s: Couldn't register rs422 IOC4 serial driver\n", - __func__); - goto out_uart_rs232; - } - - /* register with IOC4 main module */ - ret = ioc4_register_submodule(&ioc4_serial_submodule); - if (ret) - goto out_uart_rs422; - return 0; - -out_uart_rs422: - uart_unregister_driver(&ioc4_uart_rs422); -out_uart_rs232: - uart_unregister_driver(&ioc4_uart_rs232); -out: - return ret; -} - -static void __exit ioc4_serial_exit(void) -{ - ioc4_unregister_submodule(&ioc4_serial_submodule); - uart_unregister_driver(&ioc4_uart_rs232); - uart_unregister_driver(&ioc4_uart_rs422); -} - -late_initcall(ioc4_serial_init); /* Call only after tty init is done */ -module_exit(ioc4_serial_exit); - -MODULE_AUTHOR("Pat Gefre - Silicon Graphics Inc. (SGI) <pfg@sgi.com>"); -MODULE_DESCRIPTION("Serial PCI driver module for SGI IOC4 Base-IO Card"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/ip22zilog.c b/drivers/serial/ip22zilog.c deleted file mode 100644 index ebff4a1d4bcc..000000000000 --- a/drivers/serial/ip22zilog.c +++ /dev/null @@ -1,1221 +0,0 @@ -/* - * Driver for Zilog serial chips found on SGI workstations and - * servers. This driver could actually be made more generic. - * - * This is based on the drivers/serial/sunzilog.c code as of 2.6.0-test7 and the - * old drivers/sgi/char/sgiserial.c code which itself is based of the original - * drivers/sbus/char/zs.c code. A lot of code has been simply moved over - * directly from there but much has been rewritten. Credits therefore go out - * to David S. Miller, Eddie C. Dost, Pete Zaitcev, Ted Ts'o and Alex Buell - * for their work there. - * - * Copyright (C) 2002 Ralf Baechle (ralf@linux-mips.org) - * Copyright (C) 2002 David S. Miller (davem@redhat.com) - */ -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/delay.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/major.h> -#include <linux/string.h> -#include <linux/ptrace.h> -#include <linux/ioport.h> -#include <linux/slab.h> -#include <linux/circ_buf.h> -#include <linux/serial.h> -#include <linux/sysrq.h> -#include <linux/console.h> -#include <linux/spinlock.h> -#include <linux/init.h> - -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/sgialib.h> -#include <asm/sgi/ioc.h> -#include <asm/sgi/hpc3.h> -#include <asm/sgi/ip22.h> - -#if defined(CONFIG_SERIAL_IP22_ZILOG_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/serial_core.h> - -#include "ip22zilog.h" - -/* - * On IP22 we need to delay after register accesses but we do not need to - * flush writes. - */ -#define ZSDELAY() udelay(5) -#define ZSDELAY_LONG() udelay(20) -#define ZS_WSYNC(channel) do { } while (0) - -#define NUM_IP22ZILOG 1 -#define NUM_CHANNELS (NUM_IP22ZILOG * 2) - -#define ZS_CLOCK 3672000 /* Zilog input clock rate. */ -#define ZS_CLOCK_DIVISOR 16 /* Divisor this driver uses. */ - -/* - * We wrap our port structure around the generic uart_port. - */ -struct uart_ip22zilog_port { - struct uart_port port; - - /* IRQ servicing chain. */ - struct uart_ip22zilog_port *next; - - /* Current values of Zilog write registers. */ - unsigned char curregs[NUM_ZSREGS]; - - unsigned int flags; -#define IP22ZILOG_FLAG_IS_CONS 0x00000004 -#define IP22ZILOG_FLAG_IS_KGDB 0x00000008 -#define IP22ZILOG_FLAG_MODEM_STATUS 0x00000010 -#define IP22ZILOG_FLAG_IS_CHANNEL_A 0x00000020 -#define IP22ZILOG_FLAG_REGS_HELD 0x00000040 -#define IP22ZILOG_FLAG_TX_STOPPED 0x00000080 -#define IP22ZILOG_FLAG_TX_ACTIVE 0x00000100 -#define IP22ZILOG_FLAG_RESET_DONE 0x00000200 - - unsigned int tty_break; - - unsigned char parity_mask; - unsigned char prev_status; -}; - -#define ZILOG_CHANNEL_FROM_PORT(PORT) ((struct zilog_channel *)((PORT)->membase)) -#define UART_ZILOG(PORT) ((struct uart_ip22zilog_port *)(PORT)) -#define IP22ZILOG_GET_CURR_REG(PORT, REGNUM) \ - (UART_ZILOG(PORT)->curregs[REGNUM]) -#define IP22ZILOG_SET_CURR_REG(PORT, REGNUM, REGVAL) \ - ((UART_ZILOG(PORT)->curregs[REGNUM]) = (REGVAL)) -#define ZS_IS_CONS(UP) ((UP)->flags & IP22ZILOG_FLAG_IS_CONS) -#define ZS_IS_KGDB(UP) ((UP)->flags & IP22ZILOG_FLAG_IS_KGDB) -#define ZS_WANTS_MODEM_STATUS(UP) ((UP)->flags & IP22ZILOG_FLAG_MODEM_STATUS) -#define ZS_IS_CHANNEL_A(UP) ((UP)->flags & IP22ZILOG_FLAG_IS_CHANNEL_A) -#define ZS_REGS_HELD(UP) ((UP)->flags & IP22ZILOG_FLAG_REGS_HELD) -#define ZS_TX_STOPPED(UP) ((UP)->flags & IP22ZILOG_FLAG_TX_STOPPED) -#define ZS_TX_ACTIVE(UP) ((UP)->flags & IP22ZILOG_FLAG_TX_ACTIVE) - -/* Reading and writing Zilog8530 registers. The delays are to make this - * driver work on the IP22 which needs a settling delay after each chip - * register access, other machines handle this in hardware via auxiliary - * flip-flops which implement the settle time we do in software. - * - * The port lock must be held and local IRQs must be disabled - * when {read,write}_zsreg is invoked. - */ -static unsigned char read_zsreg(struct zilog_channel *channel, - unsigned char reg) -{ - unsigned char retval; - - writeb(reg, &channel->control); - ZSDELAY(); - retval = readb(&channel->control); - ZSDELAY(); - - return retval; -} - -static void write_zsreg(struct zilog_channel *channel, - unsigned char reg, unsigned char value) -{ - writeb(reg, &channel->control); - ZSDELAY(); - writeb(value, &channel->control); - ZSDELAY(); -} - -static void ip22zilog_clear_fifo(struct zilog_channel *channel) -{ - int i; - - for (i = 0; i < 32; i++) { - unsigned char regval; - - regval = readb(&channel->control); - ZSDELAY(); - if (regval & Rx_CH_AV) - break; - - regval = read_zsreg(channel, R1); - readb(&channel->data); - ZSDELAY(); - - if (regval & (PAR_ERR | Rx_OVR | CRC_ERR)) { - writeb(ERR_RES, &channel->control); - ZSDELAY(); - ZS_WSYNC(channel); - } - } -} - -/* This function must only be called when the TX is not busy. The UART - * port lock must be held and local interrupts disabled. - */ -static void __load_zsregs(struct zilog_channel *channel, unsigned char *regs) -{ - int i; - - /* Let pending transmits finish. */ - for (i = 0; i < 1000; i++) { - unsigned char stat = read_zsreg(channel, R1); - if (stat & ALL_SNT) - break; - udelay(100); - } - - writeb(ERR_RES, &channel->control); - ZSDELAY(); - ZS_WSYNC(channel); - - ip22zilog_clear_fifo(channel); - - /* Disable all interrupts. */ - write_zsreg(channel, R1, - regs[R1] & ~(RxINT_MASK | TxINT_ENAB | EXT_INT_ENAB)); - - /* Set parity, sync config, stop bits, and clock divisor. */ - write_zsreg(channel, R4, regs[R4]); - - /* Set misc. TX/RX control bits. */ - write_zsreg(channel, R10, regs[R10]); - - /* Set TX/RX controls sans the enable bits. */ - write_zsreg(channel, R3, regs[R3] & ~RxENAB); - write_zsreg(channel, R5, regs[R5] & ~TxENAB); - - /* Synchronous mode config. */ - write_zsreg(channel, R6, regs[R6]); - write_zsreg(channel, R7, regs[R7]); - - /* Don't mess with the interrupt vector (R2, unused by us) and - * master interrupt control (R9). We make sure this is setup - * properly at probe time then never touch it again. - */ - - /* Disable baud generator. */ - write_zsreg(channel, R14, regs[R14] & ~BRENAB); - - /* Clock mode control. */ - write_zsreg(channel, R11, regs[R11]); - - /* Lower and upper byte of baud rate generator divisor. */ - write_zsreg(channel, R12, regs[R12]); - write_zsreg(channel, R13, regs[R13]); - - /* Now rewrite R14, with BRENAB (if set). */ - write_zsreg(channel, R14, regs[R14]); - - /* External status interrupt control. */ - write_zsreg(channel, R15, regs[R15]); - - /* Reset external status interrupts. */ - write_zsreg(channel, R0, RES_EXT_INT); - write_zsreg(channel, R0, RES_EXT_INT); - - /* Rewrite R3/R5, this time without enables masked. */ - write_zsreg(channel, R3, regs[R3]); - write_zsreg(channel, R5, regs[R5]); - - /* Rewrite R1, this time without IRQ enabled masked. */ - write_zsreg(channel, R1, regs[R1]); -} - -/* Reprogram the Zilog channel HW registers with the copies found in the - * software state struct. If the transmitter is busy, we defer this update - * until the next TX complete interrupt. Else, we do it right now. - * - * The UART port lock must be held and local interrupts disabled. - */ -static void ip22zilog_maybe_update_regs(struct uart_ip22zilog_port *up, - struct zilog_channel *channel) -{ - if (!ZS_REGS_HELD(up)) { - if (ZS_TX_ACTIVE(up)) { - up->flags |= IP22ZILOG_FLAG_REGS_HELD; - } else { - __load_zsregs(channel, up->curregs); - } - } -} - -#define Rx_BRK 0x0100 /* BREAK event software flag. */ -#define Rx_SYS 0x0200 /* SysRq event software flag. */ - -static struct tty_struct *ip22zilog_receive_chars(struct uart_ip22zilog_port *up, - struct zilog_channel *channel) -{ - struct tty_struct *tty; - unsigned char ch, flag; - unsigned int r1; - - tty = NULL; - if (up->port.state != NULL && - up->port.state->port.tty != NULL) - tty = up->port.state->port.tty; - - for (;;) { - ch = readb(&channel->control); - ZSDELAY(); - if (!(ch & Rx_CH_AV)) - break; - - r1 = read_zsreg(channel, R1); - if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR)) { - writeb(ERR_RES, &channel->control); - ZSDELAY(); - ZS_WSYNC(channel); - } - - ch = readb(&channel->data); - ZSDELAY(); - - ch &= up->parity_mask; - - /* Handle the null char got when BREAK is removed. */ - if (!ch) - r1 |= up->tty_break; - - /* A real serial line, record the character and status. */ - flag = TTY_NORMAL; - up->port.icount.rx++; - if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR | Rx_SYS | Rx_BRK)) { - up->tty_break = 0; - - if (r1 & (Rx_SYS | Rx_BRK)) { - up->port.icount.brk++; - if (r1 & Rx_SYS) - continue; - r1 &= ~(PAR_ERR | CRC_ERR); - } - else if (r1 & PAR_ERR) - up->port.icount.parity++; - else if (r1 & CRC_ERR) - up->port.icount.frame++; - if (r1 & Rx_OVR) - up->port.icount.overrun++; - r1 &= up->port.read_status_mask; - if (r1 & Rx_BRK) - flag = TTY_BREAK; - else if (r1 & PAR_ERR) - flag = TTY_PARITY; - else if (r1 & CRC_ERR) - flag = TTY_FRAME; - } - - if (uart_handle_sysrq_char(&up->port, ch)) - continue; - - if (tty) - uart_insert_char(&up->port, r1, Rx_OVR, ch, flag); - } - return tty; -} - -static void ip22zilog_status_handle(struct uart_ip22zilog_port *up, - struct zilog_channel *channel) -{ - unsigned char status; - - status = readb(&channel->control); - ZSDELAY(); - - writeb(RES_EXT_INT, &channel->control); - ZSDELAY(); - ZS_WSYNC(channel); - - if (up->curregs[R15] & BRKIE) { - if ((status & BRK_ABRT) && !(up->prev_status & BRK_ABRT)) { - if (uart_handle_break(&up->port)) - up->tty_break = Rx_SYS; - else - up->tty_break = Rx_BRK; - } - } - - if (ZS_WANTS_MODEM_STATUS(up)) { - if (status & SYNC) - up->port.icount.dsr++; - - /* The Zilog just gives us an interrupt when DCD/CTS/etc. change. - * But it does not tell us which bit has changed, we have to keep - * track of this ourselves. - */ - if ((status ^ up->prev_status) ^ DCD) - uart_handle_dcd_change(&up->port, - (status & DCD)); - if ((status ^ up->prev_status) ^ CTS) - uart_handle_cts_change(&up->port, - (status & CTS)); - - wake_up_interruptible(&up->port.state->port.delta_msr_wait); - } - - up->prev_status = status; -} - -static void ip22zilog_transmit_chars(struct uart_ip22zilog_port *up, - struct zilog_channel *channel) -{ - struct circ_buf *xmit; - - if (ZS_IS_CONS(up)) { - unsigned char status = readb(&channel->control); - ZSDELAY(); - - /* TX still busy? Just wait for the next TX done interrupt. - * - * It can occur because of how we do serial console writes. It would - * be nice to transmit console writes just like we normally would for - * a TTY line. (ie. buffered and TX interrupt driven). That is not - * easy because console writes cannot sleep. One solution might be - * to poll on enough port->xmit space becomming free. -DaveM - */ - if (!(status & Tx_BUF_EMP)) - return; - } - - up->flags &= ~IP22ZILOG_FLAG_TX_ACTIVE; - - if (ZS_REGS_HELD(up)) { - __load_zsregs(channel, up->curregs); - up->flags &= ~IP22ZILOG_FLAG_REGS_HELD; - } - - if (ZS_TX_STOPPED(up)) { - up->flags &= ~IP22ZILOG_FLAG_TX_STOPPED; - goto ack_tx_int; - } - - if (up->port.x_char) { - up->flags |= IP22ZILOG_FLAG_TX_ACTIVE; - writeb(up->port.x_char, &channel->data); - ZSDELAY(); - ZS_WSYNC(channel); - - up->port.icount.tx++; - up->port.x_char = 0; - return; - } - - if (up->port.state == NULL) - goto ack_tx_int; - xmit = &up->port.state->xmit; - if (uart_circ_empty(xmit)) - goto ack_tx_int; - if (uart_tx_stopped(&up->port)) - goto ack_tx_int; - - up->flags |= IP22ZILOG_FLAG_TX_ACTIVE; - writeb(xmit->buf[xmit->tail], &channel->data); - ZSDELAY(); - ZS_WSYNC(channel); - - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - up->port.icount.tx++; - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&up->port); - - return; - -ack_tx_int: - writeb(RES_Tx_P, &channel->control); - ZSDELAY(); - ZS_WSYNC(channel); -} - -static irqreturn_t ip22zilog_interrupt(int irq, void *dev_id) -{ - struct uart_ip22zilog_port *up = dev_id; - - while (up) { - struct zilog_channel *channel - = ZILOG_CHANNEL_FROM_PORT(&up->port); - struct tty_struct *tty; - unsigned char r3; - - spin_lock(&up->port.lock); - r3 = read_zsreg(channel, R3); - - /* Channel A */ - tty = NULL; - if (r3 & (CHAEXT | CHATxIP | CHARxIP)) { - writeb(RES_H_IUS, &channel->control); - ZSDELAY(); - ZS_WSYNC(channel); - - if (r3 & CHARxIP) - tty = ip22zilog_receive_chars(up, channel); - if (r3 & CHAEXT) - ip22zilog_status_handle(up, channel); - if (r3 & CHATxIP) - ip22zilog_transmit_chars(up, channel); - } - spin_unlock(&up->port.lock); - - if (tty) - tty_flip_buffer_push(tty); - - /* Channel B */ - up = up->next; - channel = ZILOG_CHANNEL_FROM_PORT(&up->port); - - spin_lock(&up->port.lock); - tty = NULL; - if (r3 & (CHBEXT | CHBTxIP | CHBRxIP)) { - writeb(RES_H_IUS, &channel->control); - ZSDELAY(); - ZS_WSYNC(channel); - - if (r3 & CHBRxIP) - tty = ip22zilog_receive_chars(up, channel); - if (r3 & CHBEXT) - ip22zilog_status_handle(up, channel); - if (r3 & CHBTxIP) - ip22zilog_transmit_chars(up, channel); - } - spin_unlock(&up->port.lock); - - if (tty) - tty_flip_buffer_push(tty); - - up = up->next; - } - - return IRQ_HANDLED; -} - -/* A convenient way to quickly get R0 status. The caller must _not_ hold the - * port lock, it is acquired here. - */ -static __inline__ unsigned char ip22zilog_read_channel_status(struct uart_port *port) -{ - struct zilog_channel *channel; - unsigned char status; - - channel = ZILOG_CHANNEL_FROM_PORT(port); - status = readb(&channel->control); - ZSDELAY(); - - return status; -} - -/* The port lock is not held. */ -static unsigned int ip22zilog_tx_empty(struct uart_port *port) -{ - unsigned long flags; - unsigned char status; - unsigned int ret; - - spin_lock_irqsave(&port->lock, flags); - - status = ip22zilog_read_channel_status(port); - - spin_unlock_irqrestore(&port->lock, flags); - - if (status & Tx_BUF_EMP) - ret = TIOCSER_TEMT; - else - ret = 0; - - return ret; -} - -/* The port lock is held and interrupts are disabled. */ -static unsigned int ip22zilog_get_mctrl(struct uart_port *port) -{ - unsigned char status; - unsigned int ret; - - status = ip22zilog_read_channel_status(port); - - ret = 0; - if (status & DCD) - ret |= TIOCM_CAR; - if (status & SYNC) - ret |= TIOCM_DSR; - if (status & CTS) - ret |= TIOCM_CTS; - - return ret; -} - -/* The port lock is held and interrupts are disabled. */ -static void ip22zilog_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct uart_ip22zilog_port *up = (struct uart_ip22zilog_port *) port; - struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(port); - unsigned char set_bits, clear_bits; - - set_bits = clear_bits = 0; - - if (mctrl & TIOCM_RTS) - set_bits |= RTS; - else - clear_bits |= RTS; - if (mctrl & TIOCM_DTR) - set_bits |= DTR; - else - clear_bits |= DTR; - - /* NOTE: Not subject to 'transmitter active' rule. */ - up->curregs[R5] |= set_bits; - up->curregs[R5] &= ~clear_bits; - write_zsreg(channel, R5, up->curregs[R5]); -} - -/* The port lock is held and interrupts are disabled. */ -static void ip22zilog_stop_tx(struct uart_port *port) -{ - struct uart_ip22zilog_port *up = (struct uart_ip22zilog_port *) port; - - up->flags |= IP22ZILOG_FLAG_TX_STOPPED; -} - -/* The port lock is held and interrupts are disabled. */ -static void ip22zilog_start_tx(struct uart_port *port) -{ - struct uart_ip22zilog_port *up = (struct uart_ip22zilog_port *) port; - struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(port); - unsigned char status; - - up->flags |= IP22ZILOG_FLAG_TX_ACTIVE; - up->flags &= ~IP22ZILOG_FLAG_TX_STOPPED; - - status = readb(&channel->control); - ZSDELAY(); - - /* TX busy? Just wait for the TX done interrupt. */ - if (!(status & Tx_BUF_EMP)) - return; - - /* Send the first character to jump-start the TX done - * IRQ sending engine. - */ - if (port->x_char) { - writeb(port->x_char, &channel->data); - ZSDELAY(); - ZS_WSYNC(channel); - - port->icount.tx++; - port->x_char = 0; - } else { - struct circ_buf *xmit = &port->state->xmit; - - writeb(xmit->buf[xmit->tail], &channel->data); - ZSDELAY(); - ZS_WSYNC(channel); - - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&up->port); - } -} - -/* The port lock is held and interrupts are disabled. */ -static void ip22zilog_stop_rx(struct uart_port *port) -{ - struct uart_ip22zilog_port *up = UART_ZILOG(port); - struct zilog_channel *channel; - - if (ZS_IS_CONS(up)) - return; - - channel = ZILOG_CHANNEL_FROM_PORT(port); - - /* Disable all RX interrupts. */ - up->curregs[R1] &= ~RxINT_MASK; - ip22zilog_maybe_update_regs(up, channel); -} - -/* The port lock is held. */ -static void ip22zilog_enable_ms(struct uart_port *port) -{ - struct uart_ip22zilog_port *up = (struct uart_ip22zilog_port *) port; - struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(port); - unsigned char new_reg; - - new_reg = up->curregs[R15] | (DCDIE | SYNCIE | CTSIE); - if (new_reg != up->curregs[R15]) { - up->curregs[R15] = new_reg; - - /* NOTE: Not subject to 'transmitter active' rule. */ - write_zsreg(channel, R15, up->curregs[R15]); - } -} - -/* The port lock is not held. */ -static void ip22zilog_break_ctl(struct uart_port *port, int break_state) -{ - struct uart_ip22zilog_port *up = (struct uart_ip22zilog_port *) port; - struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(port); - unsigned char set_bits, clear_bits, new_reg; - unsigned long flags; - - set_bits = clear_bits = 0; - - if (break_state) - set_bits |= SND_BRK; - else - clear_bits |= SND_BRK; - - spin_lock_irqsave(&port->lock, flags); - - new_reg = (up->curregs[R5] | set_bits) & ~clear_bits; - if (new_reg != up->curregs[R5]) { - up->curregs[R5] = new_reg; - - /* NOTE: Not subject to 'transmitter active' rule. */ - write_zsreg(channel, R5, up->curregs[R5]); - } - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void __ip22zilog_reset(struct uart_ip22zilog_port *up) -{ - struct zilog_channel *channel; - int i; - - if (up->flags & IP22ZILOG_FLAG_RESET_DONE) - return; - - /* Let pending transmits finish. */ - channel = ZILOG_CHANNEL_FROM_PORT(&up->port); - for (i = 0; i < 1000; i++) { - unsigned char stat = read_zsreg(channel, R1); - if (stat & ALL_SNT) - break; - udelay(100); - } - - if (!ZS_IS_CHANNEL_A(up)) { - up++; - channel = ZILOG_CHANNEL_FROM_PORT(&up->port); - } - write_zsreg(channel, R9, FHWRES); - ZSDELAY_LONG(); - (void) read_zsreg(channel, R0); - - up->flags |= IP22ZILOG_FLAG_RESET_DONE; - up->next->flags |= IP22ZILOG_FLAG_RESET_DONE; -} - -static void __ip22zilog_startup(struct uart_ip22zilog_port *up) -{ - struct zilog_channel *channel; - - channel = ZILOG_CHANNEL_FROM_PORT(&up->port); - - __ip22zilog_reset(up); - - __load_zsregs(channel, up->curregs); - /* set master interrupt enable */ - write_zsreg(channel, R9, up->curregs[R9]); - up->prev_status = readb(&channel->control); - - /* Enable receiver and transmitter. */ - up->curregs[R3] |= RxENAB; - up->curregs[R5] |= TxENAB; - - up->curregs[R1] |= EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; - ip22zilog_maybe_update_regs(up, channel); -} - -static int ip22zilog_startup(struct uart_port *port) -{ - struct uart_ip22zilog_port *up = UART_ZILOG(port); - unsigned long flags; - - if (ZS_IS_CONS(up)) - return 0; - - spin_lock_irqsave(&port->lock, flags); - __ip22zilog_startup(up); - spin_unlock_irqrestore(&port->lock, flags); - return 0; -} - -/* - * The test for ZS_IS_CONS is explained by the following e-mail: - ***** - * From: Russell King <rmk@arm.linux.org.uk> - * Date: Sun, 8 Dec 2002 10:18:38 +0000 - * - * On Sun, Dec 08, 2002 at 02:43:36AM -0500, Pete Zaitcev wrote: - * > I boot my 2.5 boxes using "console=ttyS0,9600" argument, - * > and I noticed that something is not right with reference - * > counting in this case. It seems that when the console - * > is open by kernel initially, this is not accounted - * > as an open, and uart_startup is not called. - * - * That is correct. We are unable to call uart_startup when the serial - * console is initialised because it may need to allocate memory (as - * request_irq does) and the memory allocators may not have been - * initialised. - * - * 1. initialise the port into a state where it can send characters in the - * console write method. - * - * 2. don't do the actual hardware shutdown in your shutdown() method (but - * do the normal software shutdown - ie, free irqs etc) - ***** - */ -static void ip22zilog_shutdown(struct uart_port *port) -{ - struct uart_ip22zilog_port *up = UART_ZILOG(port); - struct zilog_channel *channel; - unsigned long flags; - - if (ZS_IS_CONS(up)) - return; - - spin_lock_irqsave(&port->lock, flags); - - channel = ZILOG_CHANNEL_FROM_PORT(port); - - /* Disable receiver and transmitter. */ - up->curregs[R3] &= ~RxENAB; - up->curregs[R5] &= ~TxENAB; - - /* Disable all interrupts and BRK assertion. */ - up->curregs[R1] &= ~(EXT_INT_ENAB | TxINT_ENAB | RxINT_MASK); - up->curregs[R5] &= ~SND_BRK; - ip22zilog_maybe_update_regs(up, channel); - - spin_unlock_irqrestore(&port->lock, flags); -} - -/* Shared by TTY driver and serial console setup. The port lock is held - * and local interrupts are disabled. - */ -static void -ip22zilog_convert_to_zs(struct uart_ip22zilog_port *up, unsigned int cflag, - unsigned int iflag, int brg) -{ - - up->curregs[R10] = NRZ; - up->curregs[R11] = TCBR | RCBR; - - /* Program BAUD and clock source. */ - up->curregs[R4] &= ~XCLK_MASK; - up->curregs[R4] |= X16CLK; - up->curregs[R12] = brg & 0xff; - up->curregs[R13] = (brg >> 8) & 0xff; - up->curregs[R14] = BRENAB; - - /* Character size, stop bits, and parity. */ - up->curregs[3] &= ~RxN_MASK; - up->curregs[5] &= ~TxN_MASK; - switch (cflag & CSIZE) { - case CS5: - up->curregs[3] |= Rx5; - up->curregs[5] |= Tx5; - up->parity_mask = 0x1f; - break; - case CS6: - up->curregs[3] |= Rx6; - up->curregs[5] |= Tx6; - up->parity_mask = 0x3f; - break; - case CS7: - up->curregs[3] |= Rx7; - up->curregs[5] |= Tx7; - up->parity_mask = 0x7f; - break; - case CS8: - default: - up->curregs[3] |= Rx8; - up->curregs[5] |= Tx8; - up->parity_mask = 0xff; - break; - }; - up->curregs[4] &= ~0x0c; - if (cflag & CSTOPB) - up->curregs[4] |= SB2; - else - up->curregs[4] |= SB1; - if (cflag & PARENB) - up->curregs[4] |= PAR_ENAB; - else - up->curregs[4] &= ~PAR_ENAB; - if (!(cflag & PARODD)) - up->curregs[4] |= PAR_EVEN; - else - up->curregs[4] &= ~PAR_EVEN; - - up->port.read_status_mask = Rx_OVR; - if (iflag & INPCK) - up->port.read_status_mask |= CRC_ERR | PAR_ERR; - if (iflag & (BRKINT | PARMRK)) - up->port.read_status_mask |= BRK_ABRT; - - up->port.ignore_status_mask = 0; - if (iflag & IGNPAR) - up->port.ignore_status_mask |= CRC_ERR | PAR_ERR; - if (iflag & IGNBRK) { - up->port.ignore_status_mask |= BRK_ABRT; - if (iflag & IGNPAR) - up->port.ignore_status_mask |= Rx_OVR; - } - - if ((cflag & CREAD) == 0) - up->port.ignore_status_mask = 0xff; -} - -/* The port lock is not held. */ -static void -ip22zilog_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct uart_ip22zilog_port *up = (struct uart_ip22zilog_port *) port; - unsigned long flags; - int baud, brg; - - baud = uart_get_baud_rate(port, termios, old, 1200, 76800); - - spin_lock_irqsave(&up->port.lock, flags); - - brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); - - ip22zilog_convert_to_zs(up, termios->c_cflag, termios->c_iflag, brg); - - if (UART_ENABLE_MS(&up->port, termios->c_cflag)) - up->flags |= IP22ZILOG_FLAG_MODEM_STATUS; - else - up->flags &= ~IP22ZILOG_FLAG_MODEM_STATUS; - - ip22zilog_maybe_update_regs(up, ZILOG_CHANNEL_FROM_PORT(port)); - uart_update_timeout(port, termios->c_cflag, baud); - - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static const char *ip22zilog_type(struct uart_port *port) -{ - return "IP22-Zilog"; -} - -/* We do not request/release mappings of the registers here, this - * happens at early serial probe time. - */ -static void ip22zilog_release_port(struct uart_port *port) -{ -} - -static int ip22zilog_request_port(struct uart_port *port) -{ - return 0; -} - -/* These do not need to do anything interesting either. */ -static void ip22zilog_config_port(struct uart_port *port, int flags) -{ -} - -/* We do not support letting the user mess with the divisor, IRQ, etc. */ -static int ip22zilog_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - return -EINVAL; -} - -static struct uart_ops ip22zilog_pops = { - .tx_empty = ip22zilog_tx_empty, - .set_mctrl = ip22zilog_set_mctrl, - .get_mctrl = ip22zilog_get_mctrl, - .stop_tx = ip22zilog_stop_tx, - .start_tx = ip22zilog_start_tx, - .stop_rx = ip22zilog_stop_rx, - .enable_ms = ip22zilog_enable_ms, - .break_ctl = ip22zilog_break_ctl, - .startup = ip22zilog_startup, - .shutdown = ip22zilog_shutdown, - .set_termios = ip22zilog_set_termios, - .type = ip22zilog_type, - .release_port = ip22zilog_release_port, - .request_port = ip22zilog_request_port, - .config_port = ip22zilog_config_port, - .verify_port = ip22zilog_verify_port, -}; - -static struct uart_ip22zilog_port *ip22zilog_port_table; -static struct zilog_layout **ip22zilog_chip_regs; - -static struct uart_ip22zilog_port *ip22zilog_irq_chain; -static int zilog_irq = -1; - -static void * __init alloc_one_table(unsigned long size) -{ - return kzalloc(size, GFP_KERNEL); -} - -static void __init ip22zilog_alloc_tables(void) -{ - ip22zilog_port_table = (struct uart_ip22zilog_port *) - alloc_one_table(NUM_CHANNELS * sizeof(struct uart_ip22zilog_port)); - ip22zilog_chip_regs = (struct zilog_layout **) - alloc_one_table(NUM_IP22ZILOG * sizeof(struct zilog_layout *)); - - if (ip22zilog_port_table == NULL || ip22zilog_chip_regs == NULL) { - panic("IP22-Zilog: Cannot allocate IP22-Zilog tables."); - } -} - -/* Get the address of the registers for IP22-Zilog instance CHIP. */ -static struct zilog_layout * __init get_zs(int chip) -{ - unsigned long base; - - if (chip < 0 || chip >= NUM_IP22ZILOG) { - panic("IP22-Zilog: Illegal chip number %d in get_zs.", chip); - } - - /* Not probe-able, hard code it. */ - base = (unsigned long) &sgioc->uart; - - zilog_irq = SGI_SERIAL_IRQ; - request_mem_region(base, 8, "IP22-Zilog"); - - return (struct zilog_layout *) base; -} - -#define ZS_PUT_CHAR_MAX_DELAY 2000 /* 10 ms */ - -#ifdef CONFIG_SERIAL_IP22_ZILOG_CONSOLE -static void ip22zilog_put_char(struct uart_port *port, int ch) -{ - struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(port); - int loops = ZS_PUT_CHAR_MAX_DELAY; - - /* This is a timed polling loop so do not switch the explicit - * udelay with ZSDELAY as that is a NOP on some platforms. -DaveM - */ - do { - unsigned char val = readb(&channel->control); - if (val & Tx_BUF_EMP) { - ZSDELAY(); - break; - } - udelay(5); - } while (--loops); - - writeb(ch, &channel->data); - ZSDELAY(); - ZS_WSYNC(channel); -} - -static void -ip22zilog_console_write(struct console *con, const char *s, unsigned int count) -{ - struct uart_ip22zilog_port *up = &ip22zilog_port_table[con->index]; - unsigned long flags; - - spin_lock_irqsave(&up->port.lock, flags); - uart_console_write(&up->port, s, count, ip22zilog_put_char); - udelay(2); - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static int __init ip22zilog_console_setup(struct console *con, char *options) -{ - struct uart_ip22zilog_port *up = &ip22zilog_port_table[con->index]; - unsigned long flags; - int baud = 9600, bits = 8; - int parity = 'n'; - int flow = 'n'; - - up->flags |= IP22ZILOG_FLAG_IS_CONS; - - printk(KERN_INFO "Console: ttyS%d (IP22-Zilog)\n", con->index); - - spin_lock_irqsave(&up->port.lock, flags); - - up->curregs[R15] |= BRKIE; - - __ip22zilog_startup(up); - - spin_unlock_irqrestore(&up->port.lock, flags); - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - return uart_set_options(&up->port, con, baud, parity, bits, flow); -} - -static struct uart_driver ip22zilog_reg; - -static struct console ip22zilog_console = { - .name = "ttyS", - .write = ip22zilog_console_write, - .device = uart_console_device, - .setup = ip22zilog_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &ip22zilog_reg, -}; -#endif /* CONFIG_SERIAL_IP22_ZILOG_CONSOLE */ - -static struct uart_driver ip22zilog_reg = { - .owner = THIS_MODULE, - .driver_name = "serial", - .dev_name = "ttyS", - .major = TTY_MAJOR, - .minor = 64, - .nr = NUM_CHANNELS, -#ifdef CONFIG_SERIAL_IP22_ZILOG_CONSOLE - .cons = &ip22zilog_console, -#endif -}; - -static void __init ip22zilog_prepare(void) -{ - struct uart_ip22zilog_port *up; - struct zilog_layout *rp; - int channel, chip; - - /* - * Temporary fix. - */ - for (channel = 0; channel < NUM_CHANNELS; channel++) - spin_lock_init(&ip22zilog_port_table[channel].port.lock); - - ip22zilog_irq_chain = &ip22zilog_port_table[NUM_CHANNELS - 1]; - up = &ip22zilog_port_table[0]; - for (channel = NUM_CHANNELS - 1 ; channel > 0; channel--) - up[channel].next = &up[channel - 1]; - up[channel].next = NULL; - - for (chip = 0; chip < NUM_IP22ZILOG; chip++) { - if (!ip22zilog_chip_regs[chip]) { - ip22zilog_chip_regs[chip] = rp = get_zs(chip); - - up[(chip * 2) + 0].port.membase = (char *) &rp->channelB; - up[(chip * 2) + 1].port.membase = (char *) &rp->channelA; - - /* In theory mapbase is the physical address ... */ - up[(chip * 2) + 0].port.mapbase = - (unsigned long) ioremap((unsigned long) &rp->channelB, 8); - up[(chip * 2) + 1].port.mapbase = - (unsigned long) ioremap((unsigned long) &rp->channelA, 8); - } - - /* Channel A */ - up[(chip * 2) + 0].port.iotype = UPIO_MEM; - up[(chip * 2) + 0].port.irq = zilog_irq; - up[(chip * 2) + 0].port.uartclk = ZS_CLOCK; - up[(chip * 2) + 0].port.fifosize = 1; - up[(chip * 2) + 0].port.ops = &ip22zilog_pops; - up[(chip * 2) + 0].port.type = PORT_IP22ZILOG; - up[(chip * 2) + 0].port.flags = 0; - up[(chip * 2) + 0].port.line = (chip * 2) + 0; - up[(chip * 2) + 0].flags = 0; - - /* Channel B */ - up[(chip * 2) + 1].port.iotype = UPIO_MEM; - up[(chip * 2) + 1].port.irq = zilog_irq; - up[(chip * 2) + 1].port.uartclk = ZS_CLOCK; - up[(chip * 2) + 1].port.fifosize = 1; - up[(chip * 2) + 1].port.ops = &ip22zilog_pops; - up[(chip * 2) + 1].port.type = PORT_IP22ZILOG; - up[(chip * 2) + 1].port.line = (chip * 2) + 1; - up[(chip * 2) + 1].flags |= IP22ZILOG_FLAG_IS_CHANNEL_A; - } - - for (channel = 0; channel < NUM_CHANNELS; channel++) { - struct uart_ip22zilog_port *up = &ip22zilog_port_table[channel]; - int brg; - - /* Normal serial TTY. */ - up->parity_mask = 0xff; - up->curregs[R1] = EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; - up->curregs[R4] = PAR_EVEN | X16CLK | SB1; - up->curregs[R3] = RxENAB | Rx8; - up->curregs[R5] = TxENAB | Tx8; - up->curregs[R9] = NV | MIE; - up->curregs[R10] = NRZ; - up->curregs[R11] = TCBR | RCBR; - brg = BPS_TO_BRG(9600, ZS_CLOCK / ZS_CLOCK_DIVISOR); - up->curregs[R12] = (brg & 0xff); - up->curregs[R13] = (brg >> 8) & 0xff; - up->curregs[R14] = BRENAB; - } -} - -static int __init ip22zilog_ports_init(void) -{ - int ret; - - printk(KERN_INFO "Serial: IP22 Zilog driver (%d chips).\n", NUM_IP22ZILOG); - - ip22zilog_prepare(); - - if (request_irq(zilog_irq, ip22zilog_interrupt, 0, - "IP22-Zilog", ip22zilog_irq_chain)) { - panic("IP22-Zilog: Unable to register zs interrupt handler.\n"); - } - - ret = uart_register_driver(&ip22zilog_reg); - if (ret == 0) { - int i; - - for (i = 0; i < NUM_CHANNELS; i++) { - struct uart_ip22zilog_port *up = &ip22zilog_port_table[i]; - - uart_add_one_port(&ip22zilog_reg, &up->port); - } - } - - return ret; -} - -static int __init ip22zilog_init(void) -{ - /* IP22 Zilog setup is hard coded, no probing to do. */ - ip22zilog_alloc_tables(); - ip22zilog_ports_init(); - - return 0; -} - -static void __exit ip22zilog_exit(void) -{ - int i; - struct uart_ip22zilog_port *up; - - for (i = 0; i < NUM_CHANNELS; i++) { - up = &ip22zilog_port_table[i]; - - uart_remove_one_port(&ip22zilog_reg, &up->port); - } - - /* Free IO mem */ - up = &ip22zilog_port_table[0]; - for (i = 0; i < NUM_IP22ZILOG; i++) { - if (up[(i * 2) + 0].port.mapbase) { - iounmap((void*)up[(i * 2) + 0].port.mapbase); - up[(i * 2) + 0].port.mapbase = 0; - } - if (up[(i * 2) + 1].port.mapbase) { - iounmap((void*)up[(i * 2) + 1].port.mapbase); - up[(i * 2) + 1].port.mapbase = 0; - } - } - - uart_unregister_driver(&ip22zilog_reg); -} - -module_init(ip22zilog_init); -module_exit(ip22zilog_exit); - -/* David wrote it but I'm to blame for the bugs ... */ -MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>"); -MODULE_DESCRIPTION("SGI Zilog serial port driver"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/ip22zilog.h b/drivers/serial/ip22zilog.h deleted file mode 100644 index a59a9a8341d2..000000000000 --- a/drivers/serial/ip22zilog.h +++ /dev/null @@ -1,281 +0,0 @@ -#ifndef _IP22_ZILOG_H -#define _IP22_ZILOG_H - -#include <asm/byteorder.h> - -struct zilog_channel { -#ifdef __BIG_ENDIAN - volatile unsigned char unused0[3]; - volatile unsigned char control; - volatile unsigned char unused1[3]; - volatile unsigned char data; -#else /* __LITTLE_ENDIAN */ - volatile unsigned char control; - volatile unsigned char unused0[3]; - volatile unsigned char data; - volatile unsigned char unused1[3]; -#endif -}; - -struct zilog_layout { - struct zilog_channel channelB; - struct zilog_channel channelA; -}; - -#define NUM_ZSREGS 16 - -/* Conversion routines to/from brg time constants from/to bits - * per second. - */ -#define BRG_TO_BPS(brg, freq) ((freq) / 2 / ((brg) + 2)) -#define BPS_TO_BRG(bps, freq) ((((freq) + (bps)) / (2 * (bps))) - 2) - -/* The Zilog register set */ - -#define FLAG 0x7e - -/* Write Register 0 */ -#define R0 0 /* Register selects */ -#define R1 1 -#define R2 2 -#define R3 3 -#define R4 4 -#define R5 5 -#define R6 6 -#define R7 7 -#define R8 8 -#define R9 9 -#define R10 10 -#define R11 11 -#define R12 12 -#define R13 13 -#define R14 14 -#define R15 15 - -#define NULLCODE 0 /* Null Code */ -#define POINT_HIGH 0x8 /* Select upper half of registers */ -#define RES_EXT_INT 0x10 /* Reset Ext. Status Interrupts */ -#define SEND_ABORT 0x18 /* HDLC Abort */ -#define RES_RxINT_FC 0x20 /* Reset RxINT on First Character */ -#define RES_Tx_P 0x28 /* Reset TxINT Pending */ -#define ERR_RES 0x30 /* Error Reset */ -#define RES_H_IUS 0x38 /* Reset highest IUS */ - -#define RES_Rx_CRC 0x40 /* Reset Rx CRC Checker */ -#define RES_Tx_CRC 0x80 /* Reset Tx CRC Checker */ -#define RES_EOM_L 0xC0 /* Reset EOM latch */ - -/* Write Register 1 */ - -#define EXT_INT_ENAB 0x1 /* Ext Int Enable */ -#define TxINT_ENAB 0x2 /* Tx Int Enable */ -#define PAR_SPEC 0x4 /* Parity is special condition */ - -#define RxINT_DISAB 0 /* Rx Int Disable */ -#define RxINT_FCERR 0x8 /* Rx Int on First Character Only or Error */ -#define INT_ALL_Rx 0x10 /* Int on all Rx Characters or error */ -#define INT_ERR_Rx 0x18 /* Int on error only */ -#define RxINT_MASK 0x18 - -#define WT_RDY_RT 0x20 /* Wait/Ready on R/T */ -#define WT_FN_RDYFN 0x40 /* Wait/FN/Ready FN */ -#define WT_RDY_ENAB 0x80 /* Wait/Ready Enable */ - -/* Write Register #2 (Interrupt Vector) */ - -/* Write Register 3 */ - -#define RxENAB 0x1 /* Rx Enable */ -#define SYNC_L_INH 0x2 /* Sync Character Load Inhibit */ -#define ADD_SM 0x4 /* Address Search Mode (SDLC) */ -#define RxCRC_ENAB 0x8 /* Rx CRC Enable */ -#define ENT_HM 0x10 /* Enter Hunt Mode */ -#define AUTO_ENAB 0x20 /* Auto Enables */ -#define Rx5 0x0 /* Rx 5 Bits/Character */ -#define Rx7 0x40 /* Rx 7 Bits/Character */ -#define Rx6 0x80 /* Rx 6 Bits/Character */ -#define Rx8 0xc0 /* Rx 8 Bits/Character */ -#define RxN_MASK 0xc0 - -/* Write Register 4 */ - -#define PAR_ENAB 0x1 /* Parity Enable */ -#define PAR_EVEN 0x2 /* Parity Even/Odd* */ - -#define SYNC_ENAB 0 /* Sync Modes Enable */ -#define SB1 0x4 /* 1 stop bit/char */ -#define SB15 0x8 /* 1.5 stop bits/char */ -#define SB2 0xc /* 2 stop bits/char */ - -#define MONSYNC 0 /* 8 Bit Sync character */ -#define BISYNC 0x10 /* 16 bit sync character */ -#define SDLC 0x20 /* SDLC Mode (01111110 Sync Flag) */ -#define EXTSYNC 0x30 /* External Sync Mode */ - -#define X1CLK 0x0 /* x1 clock mode */ -#define X16CLK 0x40 /* x16 clock mode */ -#define X32CLK 0x80 /* x32 clock mode */ -#define X64CLK 0xC0 /* x64 clock mode */ -#define XCLK_MASK 0xC0 - -/* Write Register 5 */ - -#define TxCRC_ENAB 0x1 /* Tx CRC Enable */ -#define RTS 0x2 /* RTS */ -#define SDLC_CRC 0x4 /* SDLC/CRC-16 */ -#define TxENAB 0x8 /* Tx Enable */ -#define SND_BRK 0x10 /* Send Break */ -#define Tx5 0x0 /* Tx 5 bits (or less)/character */ -#define Tx7 0x20 /* Tx 7 bits/character */ -#define Tx6 0x40 /* Tx 6 bits/character */ -#define Tx8 0x60 /* Tx 8 bits/character */ -#define TxN_MASK 0x60 -#define DTR 0x80 /* DTR */ - -/* Write Register 6 (Sync bits 0-7/SDLC Address Field) */ - -/* Write Register 7 (Sync bits 8-15/SDLC 01111110) */ - -/* Write Register 8 (transmit buffer) */ - -/* Write Register 9 (Master interrupt control) */ -#define VIS 1 /* Vector Includes Status */ -#define NV 2 /* No Vector */ -#define DLC 4 /* Disable Lower Chain */ -#define MIE 8 /* Master Interrupt Enable */ -#define STATHI 0x10 /* Status high */ -#define NORESET 0 /* No reset on write to R9 */ -#define CHRB 0x40 /* Reset channel B */ -#define CHRA 0x80 /* Reset channel A */ -#define FHWRES 0xc0 /* Force hardware reset */ - -/* Write Register 10 (misc control bits) */ -#define BIT6 1 /* 6 bit/8bit sync */ -#define LOOPMODE 2 /* SDLC Loop mode */ -#define ABUNDER 4 /* Abort/flag on SDLC xmit underrun */ -#define MARKIDLE 8 /* Mark/flag on idle */ -#define GAOP 0x10 /* Go active on poll */ -#define NRZ 0 /* NRZ mode */ -#define NRZI 0x20 /* NRZI mode */ -#define FM1 0x40 /* FM1 (transition = 1) */ -#define FM0 0x60 /* FM0 (transition = 0) */ -#define CRCPS 0x80 /* CRC Preset I/O */ - -/* Write Register 11 (Clock Mode control) */ -#define TRxCXT 0 /* TRxC = Xtal output */ -#define TRxCTC 1 /* TRxC = Transmit clock */ -#define TRxCBR 2 /* TRxC = BR Generator Output */ -#define TRxCDP 3 /* TRxC = DPLL output */ -#define TRxCOI 4 /* TRxC O/I */ -#define TCRTxCP 0 /* Transmit clock = RTxC pin */ -#define TCTRxCP 8 /* Transmit clock = TRxC pin */ -#define TCBR 0x10 /* Transmit clock = BR Generator output */ -#define TCDPLL 0x18 /* Transmit clock = DPLL output */ -#define RCRTxCP 0 /* Receive clock = RTxC pin */ -#define RCTRxCP 0x20 /* Receive clock = TRxC pin */ -#define RCBR 0x40 /* Receive clock = BR Generator output */ -#define RCDPLL 0x60 /* Receive clock = DPLL output */ -#define RTxCX 0x80 /* RTxC Xtal/No Xtal */ - -/* Write Register 12 (lower byte of baud rate generator time constant) */ - -/* Write Register 13 (upper byte of baud rate generator time constant) */ - -/* Write Register 14 (Misc control bits) */ -#define BRENAB 1 /* Baud rate generator enable */ -#define BRSRC 2 /* Baud rate generator source */ -#define DTRREQ 4 /* DTR/Request function */ -#define AUTOECHO 8 /* Auto Echo */ -#define LOOPBAK 0x10 /* Local loopback */ -#define SEARCH 0x20 /* Enter search mode */ -#define RMC 0x40 /* Reset missing clock */ -#define DISDPLL 0x60 /* Disable DPLL */ -#define SSBR 0x80 /* Set DPLL source = BR generator */ -#define SSRTxC 0xa0 /* Set DPLL source = RTxC */ -#define SFMM 0xc0 /* Set FM mode */ -#define SNRZI 0xe0 /* Set NRZI mode */ - -/* Write Register 15 (external/status interrupt control) */ -#define ZCIE 2 /* Zero count IE */ -#define DCDIE 8 /* DCD IE */ -#define SYNCIE 0x10 /* Sync/hunt IE */ -#define CTSIE 0x20 /* CTS IE */ -#define TxUIE 0x40 /* Tx Underrun/EOM IE */ -#define BRKIE 0x80 /* Break/Abort IE */ - - -/* Read Register 0 */ -#define Rx_CH_AV 0x1 /* Rx Character Available */ -#define ZCOUNT 0x2 /* Zero count */ -#define Tx_BUF_EMP 0x4 /* Tx Buffer empty */ -#define DCD 0x8 /* DCD */ -#define SYNC 0x10 /* Sync/hunt */ -#define CTS 0x20 /* CTS */ -#define TxEOM 0x40 /* Tx underrun */ -#define BRK_ABRT 0x80 /* Break/Abort */ - -/* Read Register 1 */ -#define ALL_SNT 0x1 /* All sent */ -/* Residue Data for 8 Rx bits/char programmed */ -#define RES3 0x8 /* 0/3 */ -#define RES4 0x4 /* 0/4 */ -#define RES5 0xc /* 0/5 */ -#define RES6 0x2 /* 0/6 */ -#define RES7 0xa /* 0/7 */ -#define RES8 0x6 /* 0/8 */ -#define RES18 0xe /* 1/8 */ -#define RES28 0x0 /* 2/8 */ -/* Special Rx Condition Interrupts */ -#define PAR_ERR 0x10 /* Parity error */ -#define Rx_OVR 0x20 /* Rx Overrun Error */ -#define CRC_ERR 0x40 /* CRC/Framing Error */ -#define END_FR 0x80 /* End of Frame (SDLC) */ - -/* Read Register 2 (channel b only) - Interrupt vector */ -#define CHB_Tx_EMPTY 0x00 -#define CHB_EXT_STAT 0x02 -#define CHB_Rx_AVAIL 0x04 -#define CHB_SPECIAL 0x06 -#define CHA_Tx_EMPTY 0x08 -#define CHA_EXT_STAT 0x0a -#define CHA_Rx_AVAIL 0x0c -#define CHA_SPECIAL 0x0e -#define STATUS_MASK 0x0e - -/* Read Register 3 (interrupt pending register) ch a only */ -#define CHBEXT 0x1 /* Channel B Ext/Stat IP */ -#define CHBTxIP 0x2 /* Channel B Tx IP */ -#define CHBRxIP 0x4 /* Channel B Rx IP */ -#define CHAEXT 0x8 /* Channel A Ext/Stat IP */ -#define CHATxIP 0x10 /* Channel A Tx IP */ -#define CHARxIP 0x20 /* Channel A Rx IP */ - -/* Read Register 8 (receive data register) */ - -/* Read Register 10 (misc status bits) */ -#define ONLOOP 2 /* On loop */ -#define LOOPSEND 0x10 /* Loop sending */ -#define CLK2MIS 0x40 /* Two clocks missing */ -#define CLK1MIS 0x80 /* One clock missing */ - -/* Read Register 12 (lower byte of baud rate generator constant) */ - -/* Read Register 13 (upper byte of baud rate generator constant) */ - -/* Read Register 15 (value of WR 15) */ - -/* Misc macros */ -#define ZS_CLEARERR(channel) do { writeb(ERR_RES, &channel->control); \ - udelay(5); } while(0) - -#define ZS_CLEARSTAT(channel) do { writeb(RES_EXT_INT, &channel->control); \ - udelay(5); } while(0) - -#define ZS_CLEARFIFO(channel) do { readb(&channel->data); \ - udelay(2); \ - readb(&channel->data); \ - udelay(2); \ - readb(&channel->data); \ - udelay(2); } while(0) - -#endif /* _IP22_ZILOG_H */ diff --git a/drivers/serial/jsm/Makefile b/drivers/serial/jsm/Makefile deleted file mode 100644 index e46b6e0f8b18..000000000000 --- a/drivers/serial/jsm/Makefile +++ /dev/null @@ -1,8 +0,0 @@ -# -# Makefile for Jasmine adapter -# - -obj-$(CONFIG_SERIAL_JSM) += jsm.o - -jsm-objs := jsm_driver.o jsm_neo.o jsm_tty.o - diff --git a/drivers/serial/jsm/jsm.h b/drivers/serial/jsm/jsm.h deleted file mode 100644 index 38a509c684cd..000000000000 --- a/drivers/serial/jsm/jsm.h +++ /dev/null @@ -1,388 +0,0 @@ -/************************************************************************ - * Copyright 2003 Digi International (www.digi.com) - * - * Copyright (C) 2004 IBM Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the - * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR - * PURPOSE. See the GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 * Temple Place - Suite 330, Boston, - * MA 02111-1307, USA. - * - * Contact Information: - * Scott H Kilau <Scott_Kilau@digi.com> - * Wendy Xiong <wendyx@us.ibm.com> - * - ***********************************************************************/ - -#ifndef __JSM_DRIVER_H -#define __JSM_DRIVER_H - -#include <linux/kernel.h> -#include <linux/types.h> /* To pick up the varions Linux types */ -#include <linux/tty.h> -#include <linux/serial_core.h> -#include <linux/device.h> - -/* - * Debugging levels can be set using debug insmod variable - * They can also be compiled out completely. - */ -enum { - DBG_INIT = 0x01, - DBG_BASIC = 0x02, - DBG_CORE = 0x04, - DBG_OPEN = 0x08, - DBG_CLOSE = 0x10, - DBG_READ = 0x20, - DBG_WRITE = 0x40, - DBG_IOCTL = 0x80, - DBG_PROC = 0x100, - DBG_PARAM = 0x200, - DBG_PSCAN = 0x400, - DBG_EVENT = 0x800, - DBG_DRAIN = 0x1000, - DBG_MSIGS = 0x2000, - DBG_MGMT = 0x4000, - DBG_INTR = 0x8000, - DBG_CARR = 0x10000, -}; - -#define jsm_printk(nlevel, klevel, pdev, fmt, args...) \ - if ((DBG_##nlevel & jsm_debug)) \ - dev_printk(KERN_##klevel, pdev->dev, fmt, ## args) - -#define MAXLINES 256 -#define MAXPORTS 8 -#define MAX_STOPS_SENT 5 - -/* Board type definitions */ - -#define T_NEO 0000 -#define T_CLASSIC 0001 -#define T_PCIBUS 0400 - -/* Board State Definitions */ - -#define BD_RUNNING 0x0 -#define BD_REASON 0x7f -#define BD_NOTFOUND 0x1 -#define BD_NOIOPORT 0x2 -#define BD_NOMEM 0x3 -#define BD_NOBIOS 0x4 -#define BD_NOFEP 0x5 -#define BD_FAILED 0x6 -#define BD_ALLOCATED 0x7 -#define BD_TRIBOOT 0x8 -#define BD_BADKME 0x80 - - -/* 4 extra for alignment play space */ -#define WRITEBUFLEN ((4096) + 4) -#define MYFLIPLEN N_TTY_BUF_SIZE - -#define JSM_VERSION "jsm: 1.2-1-INKERNEL" -#define JSM_PARTNUM "40002438_A-INKERNEL" - -struct jsm_board; -struct jsm_channel; - -/************************************************************************ - * Per board operations structure * - ************************************************************************/ -struct board_ops { - irq_handler_t intr; - void (*uart_init) (struct jsm_channel *ch); - void (*uart_off) (struct jsm_channel *ch); - void (*param) (struct jsm_channel *ch); - void (*assert_modem_signals) (struct jsm_channel *ch); - void (*flush_uart_write) (struct jsm_channel *ch); - void (*flush_uart_read) (struct jsm_channel *ch); - void (*disable_receiver) (struct jsm_channel *ch); - void (*enable_receiver) (struct jsm_channel *ch); - void (*send_break) (struct jsm_channel *ch); - void (*clear_break) (struct jsm_channel *ch, int); - void (*send_start_character) (struct jsm_channel *ch); - void (*send_stop_character) (struct jsm_channel *ch); - void (*copy_data_from_queue_to_uart) (struct jsm_channel *ch); - u32 (*get_uart_bytes_left) (struct jsm_channel *ch); - void (*send_immediate_char) (struct jsm_channel *ch, unsigned char); -}; - - -/* - * Per-board information - */ -struct jsm_board -{ - int boardnum; /* Board number: 0-32 */ - - int type; /* Type of board */ - u8 rev; /* PCI revision ID */ - struct pci_dev *pci_dev; - u32 maxports; /* MAX ports this board can handle */ - - spinlock_t bd_intr_lock; /* Used to protect the poller tasklet and - * the interrupt routine from each other. - */ - - u32 nasync; /* Number of ports on card */ - - u32 irq; /* Interrupt request number */ - - u64 membase; /* Start of base memory of the card */ - u64 membase_end; /* End of base memory of the card */ - - u8 __iomem *re_map_membase;/* Remapped memory of the card */ - - u64 iobase; /* Start of io base of the card */ - u64 iobase_end; /* End of io base of the card */ - - u32 bd_uart_offset; /* Space between each UART */ - - struct jsm_channel *channels[MAXPORTS]; /* array of pointers to our channels. */ - char *flipbuf; /* Our flip buffer, alloced if board is found */ - - u32 bd_dividend; /* Board/UARTs specific dividend */ - - struct board_ops *bd_ops; - - struct list_head jsm_board_entry; -}; - -/************************************************************************ - * Device flag definitions for ch_flags. - ************************************************************************/ -#define CH_PRON 0x0001 /* Printer on string */ -#define CH_STOP 0x0002 /* Output is stopped */ -#define CH_STOPI 0x0004 /* Input is stopped */ -#define CH_CD 0x0008 /* Carrier is present */ -#define CH_FCAR 0x0010 /* Carrier forced on */ -#define CH_HANGUP 0x0020 /* Hangup received */ - -#define CH_RECEIVER_OFF 0x0040 /* Receiver is off */ -#define CH_OPENING 0x0080 /* Port in fragile open state */ -#define CH_CLOSING 0x0100 /* Port in fragile close state */ -#define CH_FIFO_ENABLED 0x0200 /* Port has FIFOs enabled */ -#define CH_TX_FIFO_EMPTY 0x0400 /* TX Fifo is completely empty */ -#define CH_TX_FIFO_LWM 0x0800 /* TX Fifo is below Low Water */ -#define CH_BREAK_SENDING 0x1000 /* Break is being sent */ -#define CH_LOOPBACK 0x2000 /* Channel is in lookback mode */ -#define CH_FLIPBUF_IN_USE 0x4000 /* Channel's flipbuf is in use */ -#define CH_BAUD0 0x08000 /* Used for checking B0 transitions */ - -/* Our Read/Error/Write queue sizes */ -#define RQUEUEMASK 0x1FFF /* 8 K - 1 */ -#define EQUEUEMASK 0x1FFF /* 8 K - 1 */ -#define WQUEUEMASK 0x0FFF /* 4 K - 1 */ -#define RQUEUESIZE (RQUEUEMASK + 1) -#define EQUEUESIZE RQUEUESIZE -#define WQUEUESIZE (WQUEUEMASK + 1) - - -/************************************************************************ - * Channel information structure. - ************************************************************************/ -struct jsm_channel { - struct uart_port uart_port; - struct jsm_board *ch_bd; /* Board structure pointer */ - - spinlock_t ch_lock; /* provide for serialization */ - wait_queue_head_t ch_flags_wait; - - u32 ch_portnum; /* Port number, 0 offset. */ - u32 ch_open_count; /* open count */ - u32 ch_flags; /* Channel flags */ - - u64 ch_close_delay; /* How long we should drop RTS/DTR for */ - - tcflag_t ch_c_iflag; /* channel iflags */ - tcflag_t ch_c_cflag; /* channel cflags */ - tcflag_t ch_c_oflag; /* channel oflags */ - tcflag_t ch_c_lflag; /* channel lflags */ - u8 ch_stopc; /* Stop character */ - u8 ch_startc; /* Start character */ - - u8 ch_mostat; /* FEP output modem status */ - u8 ch_mistat; /* FEP input modem status */ - - struct neo_uart_struct __iomem *ch_neo_uart; /* Pointer to the "mapped" UART struct */ - u8 ch_cached_lsr; /* Cached value of the LSR register */ - - u8 *ch_rqueue; /* Our read queue buffer - malloc'ed */ - u16 ch_r_head; /* Head location of the read queue */ - u16 ch_r_tail; /* Tail location of the read queue */ - - u8 *ch_equeue; /* Our error queue buffer - malloc'ed */ - u16 ch_e_head; /* Head location of the error queue */ - u16 ch_e_tail; /* Tail location of the error queue */ - - u8 *ch_wqueue; /* Our write queue buffer - malloc'ed */ - u16 ch_w_head; /* Head location of the write queue */ - u16 ch_w_tail; /* Tail location of the write queue */ - - u64 ch_rxcount; /* total of data received so far */ - u64 ch_txcount; /* total of data transmitted so far */ - - u8 ch_r_tlevel; /* Receive Trigger level */ - u8 ch_t_tlevel; /* Transmit Trigger level */ - - u8 ch_r_watermark; /* Receive Watermark */ - - - u32 ch_stops_sent; /* How many times I have sent a stop character - * to try to stop the other guy sending. - */ - u64 ch_err_parity; /* Count of parity errors on channel */ - u64 ch_err_frame; /* Count of framing errors on channel */ - u64 ch_err_break; /* Count of breaks on channel */ - u64 ch_err_overrun; /* Count of overruns on channel */ - - u64 ch_xon_sends; /* Count of xons transmitted */ - u64 ch_xoff_sends; /* Count of xoffs transmitted */ -}; - - -/************************************************************************ - * Per channel/port NEO UART structure * - ************************************************************************ - * Base Structure Entries Usage Meanings to Host * - * * - * W = read write R = read only * - * U = Unused. * - ************************************************************************/ - -struct neo_uart_struct { - u8 txrx; /* WR RHR/THR - Holding Reg */ - u8 ier; /* WR IER - Interrupt Enable Reg */ - u8 isr_fcr; /* WR ISR/FCR - Interrupt Status Reg/Fifo Control Reg */ - u8 lcr; /* WR LCR - Line Control Reg */ - u8 mcr; /* WR MCR - Modem Control Reg */ - u8 lsr; /* WR LSR - Line Status Reg */ - u8 msr; /* WR MSR - Modem Status Reg */ - u8 spr; /* WR SPR - Scratch Pad Reg */ - u8 fctr; /* WR FCTR - Feature Control Reg */ - u8 efr; /* WR EFR - Enhanced Function Reg */ - u8 tfifo; /* WR TXCNT/TXTRG - Transmit FIFO Reg */ - u8 rfifo; /* WR RXCNT/RXTRG - Recieve FIFO Reg */ - u8 xoffchar1; /* WR XOFF 1 - XOff Character 1 Reg */ - u8 xoffchar2; /* WR XOFF 2 - XOff Character 2 Reg */ - u8 xonchar1; /* WR XON 1 - Xon Character 1 Reg */ - u8 xonchar2; /* WR XON 2 - XOn Character 2 Reg */ - - u8 reserved1[0x2ff - 0x200]; /* U Reserved by Exar */ - u8 txrxburst[64]; /* RW 64 bytes of RX/TX FIFO Data */ - u8 reserved2[0x37f - 0x340]; /* U Reserved by Exar */ - u8 rxburst_with_errors[64]; /* R 64 bytes of RX FIFO Data + LSR */ -}; - -/* Where to read the extended interrupt register (32bits instead of 8bits) */ -#define UART_17158_POLL_ADDR_OFFSET 0x80 - -/* - * These are the redefinitions for the FCTR on the XR17C158, since - * Exar made them different than their earlier design. (XR16C854) - */ - -/* These are only applicable when table D is selected */ -#define UART_17158_FCTR_RTS_NODELAY 0x00 -#define UART_17158_FCTR_RTS_4DELAY 0x01 -#define UART_17158_FCTR_RTS_6DELAY 0x02 -#define UART_17158_FCTR_RTS_8DELAY 0x03 -#define UART_17158_FCTR_RTS_12DELAY 0x12 -#define UART_17158_FCTR_RTS_16DELAY 0x05 -#define UART_17158_FCTR_RTS_20DELAY 0x13 -#define UART_17158_FCTR_RTS_24DELAY 0x06 -#define UART_17158_FCTR_RTS_28DELAY 0x14 -#define UART_17158_FCTR_RTS_32DELAY 0x07 -#define UART_17158_FCTR_RTS_36DELAY 0x16 -#define UART_17158_FCTR_RTS_40DELAY 0x08 -#define UART_17158_FCTR_RTS_44DELAY 0x09 -#define UART_17158_FCTR_RTS_48DELAY 0x10 -#define UART_17158_FCTR_RTS_52DELAY 0x11 - -#define UART_17158_FCTR_RTS_IRDA 0x10 -#define UART_17158_FCTR_RS485 0x20 -#define UART_17158_FCTR_TRGA 0x00 -#define UART_17158_FCTR_TRGB 0x40 -#define UART_17158_FCTR_TRGC 0x80 -#define UART_17158_FCTR_TRGD 0xC0 - -/* 17158 trigger table selects.. */ -#define UART_17158_FCTR_BIT6 0x40 -#define UART_17158_FCTR_BIT7 0x80 - -/* 17158 TX/RX memmapped buffer offsets */ -#define UART_17158_RX_FIFOSIZE 64 -#define UART_17158_TX_FIFOSIZE 64 - -/* 17158 Extended IIR's */ -#define UART_17158_IIR_RDI_TIMEOUT 0x0C /* Receiver data TIMEOUT */ -#define UART_17158_IIR_XONXOFF 0x10 /* Received an XON/XOFF char */ -#define UART_17158_IIR_HWFLOW_STATE_CHANGE 0x20 /* CTS/DSR or RTS/DTR state change */ -#define UART_17158_IIR_FIFO_ENABLED 0xC0 /* 16550 FIFOs are Enabled */ - -/* - * These are the extended interrupts that get sent - * back to us from the UART's 32bit interrupt register - */ -#define UART_17158_RX_LINE_STATUS 0x1 /* RX Ready */ -#define UART_17158_RXRDY_TIMEOUT 0x2 /* RX Ready Timeout */ -#define UART_17158_TXRDY 0x3 /* TX Ready */ -#define UART_17158_MSR 0x4 /* Modem State Change */ -#define UART_17158_TX_AND_FIFO_CLR 0x40 /* Transmitter Holding Reg Empty */ -#define UART_17158_RX_FIFO_DATA_ERROR 0x80 /* UART detected an RX FIFO Data error */ - -/* - * These are the EXTENDED definitions for the 17C158's Interrupt - * Enable Register. - */ -#define UART_17158_EFR_ECB 0x10 /* Enhanced control bit */ -#define UART_17158_EFR_IXON 0x2 /* Receiver compares Xon1/Xoff1 */ -#define UART_17158_EFR_IXOFF 0x8 /* Transmit Xon1/Xoff1 */ -#define UART_17158_EFR_RTSDTR 0x40 /* Auto RTS/DTR Flow Control Enable */ -#define UART_17158_EFR_CTSDSR 0x80 /* Auto CTS/DSR Flow COntrol Enable */ - -#define UART_17158_XOFF_DETECT 0x1 /* Indicates whether chip saw an incoming XOFF char */ -#define UART_17158_XON_DETECT 0x2 /* Indicates whether chip saw an incoming XON char */ - -#define UART_17158_IER_RSVD1 0x10 /* Reserved by Exar */ -#define UART_17158_IER_XOFF 0x20 /* Xoff Interrupt Enable */ -#define UART_17158_IER_RTSDTR 0x40 /* Output Interrupt Enable */ -#define UART_17158_IER_CTSDSR 0x80 /* Input Interrupt Enable */ - -#define PCI_DEVICE_NEO_2DB9_PCI_NAME "Neo 2 - DB9 Universal PCI" -#define PCI_DEVICE_NEO_2DB9PRI_PCI_NAME "Neo 2 - DB9 Universal PCI - Powered Ring Indicator" -#define PCI_DEVICE_NEO_2RJ45_PCI_NAME "Neo 2 - RJ45 Universal PCI" -#define PCI_DEVICE_NEO_2RJ45PRI_PCI_NAME "Neo 2 - RJ45 Universal PCI - Powered Ring Indicator" -#define PCIE_DEVICE_NEO_IBM_PCI_NAME "Neo 4 - PCI Express - IBM" - -/* - * Our Global Variables. - */ -extern struct uart_driver jsm_uart_driver; -extern struct board_ops jsm_neo_ops; -extern int jsm_debug; - -/************************************************************************* - * - * Prototypes for non-static functions used in more than one module - * - *************************************************************************/ -int jsm_tty_write(struct uart_port *port); -int jsm_tty_init(struct jsm_board *); -int jsm_uart_port_init(struct jsm_board *); -int jsm_remove_uart_port(struct jsm_board *); -void jsm_input(struct jsm_channel *ch); -void jsm_check_queue_flow_control(struct jsm_channel *ch); - -#endif diff --git a/drivers/serial/jsm/jsm_driver.c b/drivers/serial/jsm/jsm_driver.c deleted file mode 100644 index 18f548449c63..000000000000 --- a/drivers/serial/jsm/jsm_driver.c +++ /dev/null @@ -1,297 +0,0 @@ -/************************************************************************ - * Copyright 2003 Digi International (www.digi.com) - * - * Copyright (C) 2004 IBM Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the - * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR - * PURPOSE. See the GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 * Temple Place - Suite 330, Boston, - * MA 02111-1307, USA. - * - * Contact Information: - * Scott H Kilau <Scott_Kilau@digi.com> - * Wendy Xiong <wendyx@us.ibm.com> - * - * - ***********************************************************************/ -#include <linux/moduleparam.h> -#include <linux/pci.h> -#include <linux/slab.h> - -#include "jsm.h" - -MODULE_AUTHOR("Digi International, http://www.digi.com"); -MODULE_DESCRIPTION("Driver for the Digi International " - "Neo PCI based product line"); -MODULE_LICENSE("GPL"); -MODULE_SUPPORTED_DEVICE("jsm"); - -#define JSM_DRIVER_NAME "jsm" -#define NR_PORTS 32 -#define JSM_MINOR_START 0 - -struct uart_driver jsm_uart_driver = { - .owner = THIS_MODULE, - .driver_name = JSM_DRIVER_NAME, - .dev_name = "ttyn", - .major = 0, - .minor = JSM_MINOR_START, - .nr = NR_PORTS, -}; - -static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev, - pci_channel_state_t state); -static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev); -static void jsm_io_resume(struct pci_dev *pdev); - -static struct pci_error_handlers jsm_err_handler = { - .error_detected = jsm_io_error_detected, - .slot_reset = jsm_io_slot_reset, - .resume = jsm_io_resume, -}; - -int jsm_debug; -module_param(jsm_debug, int, 0); -MODULE_PARM_DESC(jsm_debug, "Driver debugging level"); - -static int __devinit jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent) -{ - int rc = 0; - struct jsm_board *brd; - static int adapter_count = 0; - - rc = pci_enable_device(pdev); - if (rc) { - dev_err(&pdev->dev, "Device enable FAILED\n"); - goto out; - } - - rc = pci_request_regions(pdev, "jsm"); - if (rc) { - dev_err(&pdev->dev, "pci_request_region FAILED\n"); - goto out_disable_device; - } - - brd = kzalloc(sizeof(struct jsm_board), GFP_KERNEL); - if (!brd) { - dev_err(&pdev->dev, - "memory allocation for board structure failed\n"); - rc = -ENOMEM; - goto out_release_regions; - } - - /* store the info for the board we've found */ - brd->boardnum = adapter_count++; - brd->pci_dev = pdev; - if (pdev->device == PCIE_DEVICE_ID_NEO_4_IBM) - brd->maxports = 4; - else if (pdev->device == PCI_DEVICE_ID_DIGI_NEO_8) - brd->maxports = 8; - else - brd->maxports = 2; - - spin_lock_init(&brd->bd_intr_lock); - - /* store which revision we have */ - brd->rev = pdev->revision; - - brd->irq = pdev->irq; - - jsm_printk(INIT, INFO, &brd->pci_dev, - "jsm_found_board - NEO adapter\n"); - - /* get the PCI Base Address Registers */ - brd->membase = pci_resource_start(pdev, 0); - brd->membase_end = pci_resource_end(pdev, 0); - - if (brd->membase & 1) - brd->membase &= ~3; - else - brd->membase &= ~15; - - /* Assign the board_ops struct */ - brd->bd_ops = &jsm_neo_ops; - - brd->bd_uart_offset = 0x200; - brd->bd_dividend = 921600; - - brd->re_map_membase = ioremap(brd->membase, 0x1000); - if (!brd->re_map_membase) { - dev_err(&pdev->dev, - "card has no PCI Memory resources, " - "failing board.\n"); - rc = -ENOMEM; - goto out_kfree_brd; - } - - rc = request_irq(brd->irq, brd->bd_ops->intr, - IRQF_SHARED, "JSM", brd); - if (rc) { - printk(KERN_WARNING "Failed to hook IRQ %d\n",brd->irq); - goto out_iounmap; - } - - rc = jsm_tty_init(brd); - if (rc < 0) { - dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc); - rc = -ENXIO; - goto out_free_irq; - } - - rc = jsm_uart_port_init(brd); - if (rc < 0) { - /* XXX: leaking all resources from jsm_tty_init here! */ - dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc); - rc = -ENXIO; - goto out_free_irq; - } - - /* Log the information about the board */ - dev_info(&pdev->dev, "board %d: Digi Neo (rev %d), irq %d\n", - adapter_count, brd->rev, brd->irq); - - /* - * allocate flip buffer for board. - * - * Okay to malloc with GFP_KERNEL, we are not at interrupt - * context, and there are no locks held. - */ - brd->flipbuf = kzalloc(MYFLIPLEN, GFP_KERNEL); - if (!brd->flipbuf) { - /* XXX: leaking all resources from jsm_tty_init and - jsm_uart_port_init here! */ - dev_err(&pdev->dev, "memory allocation for flipbuf failed\n"); - rc = -ENOMEM; - goto out_free_uart; - } - - pci_set_drvdata(pdev, brd); - pci_save_state(pdev); - - return 0; - out_free_uart: - jsm_remove_uart_port(brd); - out_free_irq: - jsm_remove_uart_port(brd); - free_irq(brd->irq, brd); - out_iounmap: - iounmap(brd->re_map_membase); - out_kfree_brd: - kfree(brd); - out_release_regions: - pci_release_regions(pdev); - out_disable_device: - pci_disable_device(pdev); - out: - return rc; -} - -static void __devexit jsm_remove_one(struct pci_dev *pdev) -{ - struct jsm_board *brd = pci_get_drvdata(pdev); - int i = 0; - - jsm_remove_uart_port(brd); - - free_irq(brd->irq, brd); - iounmap(brd->re_map_membase); - - /* Free all allocated channels structs */ - for (i = 0; i < brd->maxports; i++) { - if (brd->channels[i]) { - kfree(brd->channels[i]->ch_rqueue); - kfree(brd->channels[i]->ch_equeue); - kfree(brd->channels[i]->ch_wqueue); - kfree(brd->channels[i]); - } - } - - pci_release_regions(pdev); - pci_disable_device(pdev); - kfree(brd->flipbuf); - kfree(brd); -} - -static struct pci_device_id jsm_pci_tbl[] = { - { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 }, - { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 }, - { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 }, - { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 }, - { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4_IBM), 0, 0, 4 }, - { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_DIGI_NEO_8), 0, 0, 5 }, - { 0, } -}; -MODULE_DEVICE_TABLE(pci, jsm_pci_tbl); - -static struct pci_driver jsm_driver = { - .name = "jsm", - .id_table = jsm_pci_tbl, - .probe = jsm_probe_one, - .remove = __devexit_p(jsm_remove_one), - .err_handler = &jsm_err_handler, -}; - -static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev, - pci_channel_state_t state) -{ - struct jsm_board *brd = pci_get_drvdata(pdev); - - jsm_remove_uart_port(brd); - - return PCI_ERS_RESULT_NEED_RESET; -} - -static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev) -{ - int rc; - - rc = pci_enable_device(pdev); - - if (rc) - return PCI_ERS_RESULT_DISCONNECT; - - pci_set_master(pdev); - - return PCI_ERS_RESULT_RECOVERED; -} - -static void jsm_io_resume(struct pci_dev *pdev) -{ - struct jsm_board *brd = pci_get_drvdata(pdev); - - pci_restore_state(pdev); - - jsm_uart_port_init(brd); -} - -static int __init jsm_init_module(void) -{ - int rc; - - rc = uart_register_driver(&jsm_uart_driver); - if (!rc) { - rc = pci_register_driver(&jsm_driver); - if (rc) - uart_unregister_driver(&jsm_uart_driver); - } - return rc; -} - -static void __exit jsm_exit_module(void) -{ - pci_unregister_driver(&jsm_driver); - uart_unregister_driver(&jsm_uart_driver); -} - -module_init(jsm_init_module); -module_exit(jsm_exit_module); diff --git a/drivers/serial/jsm/jsm_neo.c b/drivers/serial/jsm/jsm_neo.c deleted file mode 100644 index 7960d9633c15..000000000000 --- a/drivers/serial/jsm/jsm_neo.c +++ /dev/null @@ -1,1412 +0,0 @@ -/************************************************************************ - * Copyright 2003 Digi International (www.digi.com) - * - * Copyright (C) 2004 IBM Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the - * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR - * PURPOSE. See the GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 * Temple Place - Suite 330, Boston, - * MA 02111-1307, USA. - * - * Contact Information: - * Scott H Kilau <Scott_Kilau@digi.com> - * Wendy Xiong <wendyx@us.ibm.com> - * - ***********************************************************************/ -#include <linux/delay.h> /* For udelay */ -#include <linux/serial_reg.h> /* For the various UART offsets */ -#include <linux/tty.h> -#include <linux/pci.h> -#include <asm/io.h> - -#include "jsm.h" /* Driver main header file */ - -static u32 jsm_offset_table[8] = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 }; - -/* - * This function allows calls to ensure that all outstanding - * PCI writes have been completed, by doing a PCI read against - * a non-destructive, read-only location on the Neo card. - * - * In this case, we are reading the DVID (Read-only Device Identification) - * value of the Neo card. - */ -static inline void neo_pci_posting_flush(struct jsm_board *bd) -{ - readb(bd->re_map_membase + 0x8D); -} - -static void neo_set_cts_flow_control(struct jsm_channel *ch) -{ - u8 ier, efr; - ier = readb(&ch->ch_neo_uart->ier); - efr = readb(&ch->ch_neo_uart->efr); - - jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Setting CTSFLOW\n"); - - /* Turn on auto CTS flow control */ - ier |= (UART_17158_IER_CTSDSR); - efr |= (UART_17158_EFR_ECB | UART_17158_EFR_CTSDSR); - - /* Turn off auto Xon flow control */ - efr &= ~(UART_17158_EFR_IXON); - - /* Why? Becuz Exar's spec says we have to zero it out before setting it */ - writeb(0, &ch->ch_neo_uart->efr); - - /* Turn on UART enhanced bits */ - writeb(efr, &ch->ch_neo_uart->efr); - - /* Turn on table D, with 8 char hi/low watermarks */ - writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_4DELAY), &ch->ch_neo_uart->fctr); - - /* Feed the UART our trigger levels */ - writeb(8, &ch->ch_neo_uart->tfifo); - ch->ch_t_tlevel = 8; - - writeb(ier, &ch->ch_neo_uart->ier); -} - -static void neo_set_rts_flow_control(struct jsm_channel *ch) -{ - u8 ier, efr; - ier = readb(&ch->ch_neo_uart->ier); - efr = readb(&ch->ch_neo_uart->efr); - - jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Setting RTSFLOW\n"); - - /* Turn on auto RTS flow control */ - ier |= (UART_17158_IER_RTSDTR); - efr |= (UART_17158_EFR_ECB | UART_17158_EFR_RTSDTR); - - /* Turn off auto Xoff flow control */ - ier &= ~(UART_17158_IER_XOFF); - efr &= ~(UART_17158_EFR_IXOFF); - - /* Why? Becuz Exar's spec says we have to zero it out before setting it */ - writeb(0, &ch->ch_neo_uart->efr); - - /* Turn on UART enhanced bits */ - writeb(efr, &ch->ch_neo_uart->efr); - - writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_4DELAY), &ch->ch_neo_uart->fctr); - ch->ch_r_watermark = 4; - - writeb(56, &ch->ch_neo_uart->rfifo); - ch->ch_r_tlevel = 56; - - writeb(ier, &ch->ch_neo_uart->ier); - - /* - * From the Neo UART spec sheet: - * The auto RTS/DTR function must be started by asserting - * RTS/DTR# output pin (MCR bit-0 or 1 to logic 1 after - * it is enabled. - */ - ch->ch_mostat |= (UART_MCR_RTS); -} - - -static void neo_set_ixon_flow_control(struct jsm_channel *ch) -{ - u8 ier, efr; - ier = readb(&ch->ch_neo_uart->ier); - efr = readb(&ch->ch_neo_uart->efr); - - jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Setting IXON FLOW\n"); - - /* Turn off auto CTS flow control */ - ier &= ~(UART_17158_IER_CTSDSR); - efr &= ~(UART_17158_EFR_CTSDSR); - - /* Turn on auto Xon flow control */ - efr |= (UART_17158_EFR_ECB | UART_17158_EFR_IXON); - - /* Why? Becuz Exar's spec says we have to zero it out before setting it */ - writeb(0, &ch->ch_neo_uart->efr); - - /* Turn on UART enhanced bits */ - writeb(efr, &ch->ch_neo_uart->efr); - - writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_8DELAY), &ch->ch_neo_uart->fctr); - ch->ch_r_watermark = 4; - - writeb(32, &ch->ch_neo_uart->rfifo); - ch->ch_r_tlevel = 32; - - /* Tell UART what start/stop chars it should be looking for */ - writeb(ch->ch_startc, &ch->ch_neo_uart->xonchar1); - writeb(0, &ch->ch_neo_uart->xonchar2); - - writeb(ch->ch_stopc, &ch->ch_neo_uart->xoffchar1); - writeb(0, &ch->ch_neo_uart->xoffchar2); - - writeb(ier, &ch->ch_neo_uart->ier); -} - -static void neo_set_ixoff_flow_control(struct jsm_channel *ch) -{ - u8 ier, efr; - ier = readb(&ch->ch_neo_uart->ier); - efr = readb(&ch->ch_neo_uart->efr); - - jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Setting IXOFF FLOW\n"); - - /* Turn off auto RTS flow control */ - ier &= ~(UART_17158_IER_RTSDTR); - efr &= ~(UART_17158_EFR_RTSDTR); - - /* Turn on auto Xoff flow control */ - ier |= (UART_17158_IER_XOFF); - efr |= (UART_17158_EFR_ECB | UART_17158_EFR_IXOFF); - - /* Why? Becuz Exar's spec says we have to zero it out before setting it */ - writeb(0, &ch->ch_neo_uart->efr); - - /* Turn on UART enhanced bits */ - writeb(efr, &ch->ch_neo_uart->efr); - - /* Turn on table D, with 8 char hi/low watermarks */ - writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_8DELAY), &ch->ch_neo_uart->fctr); - - writeb(8, &ch->ch_neo_uart->tfifo); - ch->ch_t_tlevel = 8; - - /* Tell UART what start/stop chars it should be looking for */ - writeb(ch->ch_startc, &ch->ch_neo_uart->xonchar1); - writeb(0, &ch->ch_neo_uart->xonchar2); - - writeb(ch->ch_stopc, &ch->ch_neo_uart->xoffchar1); - writeb(0, &ch->ch_neo_uart->xoffchar2); - - writeb(ier, &ch->ch_neo_uart->ier); -} - -static void neo_set_no_input_flow_control(struct jsm_channel *ch) -{ - u8 ier, efr; - ier = readb(&ch->ch_neo_uart->ier); - efr = readb(&ch->ch_neo_uart->efr); - - jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Unsetting Input FLOW\n"); - - /* Turn off auto RTS flow control */ - ier &= ~(UART_17158_IER_RTSDTR); - efr &= ~(UART_17158_EFR_RTSDTR); - - /* Turn off auto Xoff flow control */ - ier &= ~(UART_17158_IER_XOFF); - if (ch->ch_c_iflag & IXON) - efr &= ~(UART_17158_EFR_IXOFF); - else - efr &= ~(UART_17158_EFR_ECB | UART_17158_EFR_IXOFF); - - /* Why? Becuz Exar's spec says we have to zero it out before setting it */ - writeb(0, &ch->ch_neo_uart->efr); - - /* Turn on UART enhanced bits */ - writeb(efr, &ch->ch_neo_uart->efr); - - /* Turn on table D, with 8 char hi/low watermarks */ - writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_8DELAY), &ch->ch_neo_uart->fctr); - - ch->ch_r_watermark = 0; - - writeb(16, &ch->ch_neo_uart->tfifo); - ch->ch_t_tlevel = 16; - - writeb(16, &ch->ch_neo_uart->rfifo); - ch->ch_r_tlevel = 16; - - writeb(ier, &ch->ch_neo_uart->ier); -} - -static void neo_set_no_output_flow_control(struct jsm_channel *ch) -{ - u8 ier, efr; - ier = readb(&ch->ch_neo_uart->ier); - efr = readb(&ch->ch_neo_uart->efr); - - jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "Unsetting Output FLOW\n"); - - /* Turn off auto CTS flow control */ - ier &= ~(UART_17158_IER_CTSDSR); - efr &= ~(UART_17158_EFR_CTSDSR); - - /* Turn off auto Xon flow control */ - if (ch->ch_c_iflag & IXOFF) - efr &= ~(UART_17158_EFR_IXON); - else - efr &= ~(UART_17158_EFR_ECB | UART_17158_EFR_IXON); - - /* Why? Becuz Exar's spec says we have to zero it out before setting it */ - writeb(0, &ch->ch_neo_uart->efr); - - /* Turn on UART enhanced bits */ - writeb(efr, &ch->ch_neo_uart->efr); - - /* Turn on table D, with 8 char hi/low watermarks */ - writeb((UART_17158_FCTR_TRGD | UART_17158_FCTR_RTS_8DELAY), &ch->ch_neo_uart->fctr); - - ch->ch_r_watermark = 0; - - writeb(16, &ch->ch_neo_uart->tfifo); - ch->ch_t_tlevel = 16; - - writeb(16, &ch->ch_neo_uart->rfifo); - ch->ch_r_tlevel = 16; - - writeb(ier, &ch->ch_neo_uart->ier); -} - -static inline void neo_set_new_start_stop_chars(struct jsm_channel *ch) -{ - - /* if hardware flow control is set, then skip this whole thing */ - if (ch->ch_c_cflag & CRTSCTS) - return; - - jsm_printk(PARAM, INFO, &ch->ch_bd->pci_dev, "start\n"); - - /* Tell UART what start/stop chars it should be looking for */ - writeb(ch->ch_startc, &ch->ch_neo_uart->xonchar1); - writeb(0, &ch->ch_neo_uart->xonchar2); - - writeb(ch->ch_stopc, &ch->ch_neo_uart->xoffchar1); - writeb(0, &ch->ch_neo_uart->xoffchar2); -} - -static void neo_copy_data_from_uart_to_queue(struct jsm_channel *ch) -{ - int qleft = 0; - u8 linestatus = 0; - u8 error_mask = 0; - int n = 0; - int total = 0; - u16 head; - u16 tail; - - if (!ch) - return; - - /* cache head and tail of queue */ - head = ch->ch_r_head & RQUEUEMASK; - tail = ch->ch_r_tail & RQUEUEMASK; - - /* Get our cached LSR */ - linestatus = ch->ch_cached_lsr; - ch->ch_cached_lsr = 0; - - /* Store how much space we have left in the queue */ - if ((qleft = tail - head - 1) < 0) - qleft += RQUEUEMASK + 1; - - /* - * If the UART is not in FIFO mode, force the FIFO copy to - * NOT be run, by setting total to 0. - * - * On the other hand, if the UART IS in FIFO mode, then ask - * the UART to give us an approximation of data it has RX'ed. - */ - if (!(ch->ch_flags & CH_FIFO_ENABLED)) - total = 0; - else { - total = readb(&ch->ch_neo_uart->rfifo); - - /* - * EXAR chip bug - RX FIFO COUNT - Fudge factor. - * - * This resolves a problem/bug with the Exar chip that sometimes - * returns a bogus value in the rfifo register. - * The count can be any where from 0-3 bytes "off". - * Bizarre, but true. - */ - total -= 3; - } - - /* - * Finally, bound the copy to make sure we don't overflow - * our own queue... - * The byte by byte copy loop below this loop this will - * deal with the queue overflow possibility. - */ - total = min(total, qleft); - - while (total > 0) { - /* - * Grab the linestatus register, we need to check - * to see if there are any errors in the FIFO. - */ - linestatus = readb(&ch->ch_neo_uart->lsr); - - /* - * Break out if there is a FIFO error somewhere. - * This will allow us to go byte by byte down below, - * finding the exact location of the error. - */ - if (linestatus & UART_17158_RX_FIFO_DATA_ERROR) - break; - - /* Make sure we don't go over the end of our queue */ - n = min(((u32) total), (RQUEUESIZE - (u32) head)); - - /* - * Cut down n even further if needed, this is to fix - * a problem with memcpy_fromio() with the Neo on the - * IBM pSeries platform. - * 15 bytes max appears to be the magic number. - */ - n = min((u32) n, (u32) 12); - - /* - * Since we are grabbing the linestatus register, which - * will reset some bits after our read, we need to ensure - * we don't miss our TX FIFO emptys. - */ - if (linestatus & (UART_LSR_THRE | UART_17158_TX_AND_FIFO_CLR)) - ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); - - linestatus = 0; - - /* Copy data from uart to the queue */ - memcpy_fromio(ch->ch_rqueue + head, &ch->ch_neo_uart->txrxburst, n); - /* - * Since RX_FIFO_DATA_ERROR was 0, we are guarenteed - * that all the data currently in the FIFO is free of - * breaks and parity/frame/orun errors. - */ - memset(ch->ch_equeue + head, 0, n); - - /* Add to and flip head if needed */ - head = (head + n) & RQUEUEMASK; - total -= n; - qleft -= n; - ch->ch_rxcount += n; - } - - /* - * Create a mask to determine whether we should - * insert the character (if any) into our queue. - */ - if (ch->ch_c_iflag & IGNBRK) - error_mask |= UART_LSR_BI; - - /* - * Now cleanup any leftover bytes still in the UART. - * Also deal with any possible queue overflow here as well. - */ - while (1) { - - /* - * Its possible we have a linestatus from the loop above - * this, so we "OR" on any extra bits. - */ - linestatus |= readb(&ch->ch_neo_uart->lsr); - - /* - * If the chip tells us there is no more data pending to - * be read, we can then leave. - * But before we do, cache the linestatus, just in case. - */ - if (!(linestatus & UART_LSR_DR)) { - ch->ch_cached_lsr = linestatus; - break; - } - - /* No need to store this bit */ - linestatus &= ~UART_LSR_DR; - - /* - * Since we are grabbing the linestatus register, which - * will reset some bits after our read, we need to ensure - * we don't miss our TX FIFO emptys. - */ - if (linestatus & (UART_LSR_THRE | UART_17158_TX_AND_FIFO_CLR)) { - linestatus &= ~(UART_LSR_THRE | UART_17158_TX_AND_FIFO_CLR); - ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); - } - - /* - * Discard character if we are ignoring the error mask. - */ - if (linestatus & error_mask) { - u8 discard; - linestatus = 0; - memcpy_fromio(&discard, &ch->ch_neo_uart->txrxburst, 1); - continue; - } - - /* - * If our queue is full, we have no choice but to drop some data. - * The assumption is that HWFLOW or SWFLOW should have stopped - * things way way before we got to this point. - * - * I decided that I wanted to ditch the oldest data first, - * I hope thats okay with everyone? Yes? Good. - */ - while (qleft < 1) { - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, - "Queue full, dropping DATA:%x LSR:%x\n", - ch->ch_rqueue[tail], ch->ch_equeue[tail]); - - ch->ch_r_tail = tail = (tail + 1) & RQUEUEMASK; - ch->ch_err_overrun++; - qleft++; - } - - memcpy_fromio(ch->ch_rqueue + head, &ch->ch_neo_uart->txrxburst, 1); - ch->ch_equeue[head] = (u8) linestatus; - - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, - "DATA/LSR pair: %x %x\n", ch->ch_rqueue[head], ch->ch_equeue[head]); - - /* Ditch any remaining linestatus value. */ - linestatus = 0; - - /* Add to and flip head if needed */ - head = (head + 1) & RQUEUEMASK; - - qleft--; - ch->ch_rxcount++; - } - - /* - * Write new final heads to channel structure. - */ - ch->ch_r_head = head & RQUEUEMASK; - ch->ch_e_head = head & EQUEUEMASK; - jsm_input(ch); -} - -static void neo_copy_data_from_queue_to_uart(struct jsm_channel *ch) -{ - u16 head; - u16 tail; - int n; - int s; - int qlen; - u32 len_written = 0; - - if (!ch) - return; - - /* No data to write to the UART */ - if (ch->ch_w_tail == ch->ch_w_head) - return; - - /* If port is "stopped", don't send any data to the UART */ - if ((ch->ch_flags & CH_STOP) || (ch->ch_flags & CH_BREAK_SENDING)) - return; - /* - * If FIFOs are disabled. Send data directly to txrx register - */ - if (!(ch->ch_flags & CH_FIFO_ENABLED)) { - u8 lsrbits = readb(&ch->ch_neo_uart->lsr); - - ch->ch_cached_lsr |= lsrbits; - if (ch->ch_cached_lsr & UART_LSR_THRE) { - ch->ch_cached_lsr &= ~(UART_LSR_THRE); - - writeb(ch->ch_wqueue[ch->ch_w_tail], &ch->ch_neo_uart->txrx); - jsm_printk(WRITE, INFO, &ch->ch_bd->pci_dev, - "Tx data: %x\n", ch->ch_wqueue[ch->ch_w_head]); - ch->ch_w_tail++; - ch->ch_w_tail &= WQUEUEMASK; - ch->ch_txcount++; - } - return; - } - - /* - * We have to do it this way, because of the EXAR TXFIFO count bug. - */ - if (!(ch->ch_flags & (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM))) - return; - - n = UART_17158_TX_FIFOSIZE - ch->ch_t_tlevel; - - /* cache head and tail of queue */ - head = ch->ch_w_head & WQUEUEMASK; - tail = ch->ch_w_tail & WQUEUEMASK; - qlen = (head - tail) & WQUEUEMASK; - - /* Find minimum of the FIFO space, versus queue length */ - n = min(n, qlen); - - while (n > 0) { - - s = ((head >= tail) ? head : WQUEUESIZE) - tail; - s = min(s, n); - - if (s <= 0) - break; - - memcpy_toio(&ch->ch_neo_uart->txrxburst, ch->ch_wqueue + tail, s); - /* Add and flip queue if needed */ - tail = (tail + s) & WQUEUEMASK; - n -= s; - ch->ch_txcount += s; - len_written += s; - } - - /* Update the final tail */ - ch->ch_w_tail = tail & WQUEUEMASK; - - if (len_written >= ch->ch_t_tlevel) - ch->ch_flags &= ~(CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); - - if (!jsm_tty_write(&ch->uart_port)) - uart_write_wakeup(&ch->uart_port); -} - -static void neo_parse_modem(struct jsm_channel *ch, u8 signals) -{ - u8 msignals = signals; - - jsm_printk(MSIGS, INFO, &ch->ch_bd->pci_dev, - "neo_parse_modem: port: %d msignals: %x\n", ch->ch_portnum, msignals); - - /* Scrub off lower bits. They signify delta's, which I don't care about */ - /* Keep DDCD and DDSR though */ - msignals &= 0xf8; - - if (msignals & UART_MSR_DDCD) - uart_handle_dcd_change(&ch->uart_port, msignals & UART_MSR_DCD); - if (msignals & UART_MSR_DDSR) - uart_handle_cts_change(&ch->uart_port, msignals & UART_MSR_CTS); - if (msignals & UART_MSR_DCD) - ch->ch_mistat |= UART_MSR_DCD; - else - ch->ch_mistat &= ~UART_MSR_DCD; - - if (msignals & UART_MSR_DSR) - ch->ch_mistat |= UART_MSR_DSR; - else - ch->ch_mistat &= ~UART_MSR_DSR; - - if (msignals & UART_MSR_RI) - ch->ch_mistat |= UART_MSR_RI; - else - ch->ch_mistat &= ~UART_MSR_RI; - - if (msignals & UART_MSR_CTS) - ch->ch_mistat |= UART_MSR_CTS; - else - ch->ch_mistat &= ~UART_MSR_CTS; - - jsm_printk(MSIGS, INFO, &ch->ch_bd->pci_dev, - "Port: %d DTR: %d RTS: %d CTS: %d DSR: %d " "RI: %d CD: %d\n", - ch->ch_portnum, - !!((ch->ch_mistat | ch->ch_mostat) & UART_MCR_DTR), - !!((ch->ch_mistat | ch->ch_mostat) & UART_MCR_RTS), - !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_CTS), - !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_DSR), - !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_RI), - !!((ch->ch_mistat | ch->ch_mostat) & UART_MSR_DCD)); -} - -/* Make the UART raise any of the output signals we want up */ -static void neo_assert_modem_signals(struct jsm_channel *ch) -{ - if (!ch) - return; - - writeb(ch->ch_mostat, &ch->ch_neo_uart->mcr); - - /* flush write operation */ - neo_pci_posting_flush(ch->ch_bd); -} - -/* - * Flush the WRITE FIFO on the Neo. - * - * NOTE: Channel lock MUST be held before calling this function! - */ -static void neo_flush_uart_write(struct jsm_channel *ch) -{ - u8 tmp = 0; - int i = 0; - - if (!ch) - return; - - writeb((UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_XMIT), &ch->ch_neo_uart->isr_fcr); - - for (i = 0; i < 10; i++) { - - /* Check to see if the UART feels it completely flushed the FIFO. */ - tmp = readb(&ch->ch_neo_uart->isr_fcr); - if (tmp & 4) { - jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, - "Still flushing TX UART... i: %d\n", i); - udelay(10); - } - else - break; - } - - ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); -} - - -/* - * Flush the READ FIFO on the Neo. - * - * NOTE: Channel lock MUST be held before calling this function! - */ -static void neo_flush_uart_read(struct jsm_channel *ch) -{ - u8 tmp = 0; - int i = 0; - - if (!ch) - return; - - writeb((UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR), &ch->ch_neo_uart->isr_fcr); - - for (i = 0; i < 10; i++) { - - /* Check to see if the UART feels it completely flushed the FIFO. */ - tmp = readb(&ch->ch_neo_uart->isr_fcr); - if (tmp & 2) { - jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, - "Still flushing RX UART... i: %d\n", i); - udelay(10); - } - else - break; - } -} - -/* - * No locks are assumed to be held when calling this function. - */ -static void neo_clear_break(struct jsm_channel *ch, int force) -{ - unsigned long lock_flags; - - spin_lock_irqsave(&ch->ch_lock, lock_flags); - - /* Turn break off, and unset some variables */ - if (ch->ch_flags & CH_BREAK_SENDING) { - u8 temp = readb(&ch->ch_neo_uart->lcr); - writeb((temp & ~UART_LCR_SBC), &ch->ch_neo_uart->lcr); - - ch->ch_flags &= ~(CH_BREAK_SENDING); - jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, - "clear break Finishing UART_LCR_SBC! finished: %lx\n", jiffies); - - /* flush write operation */ - neo_pci_posting_flush(ch->ch_bd); - } - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); -} - -/* - * Parse the ISR register. - */ -static inline void neo_parse_isr(struct jsm_board *brd, u32 port) -{ - struct jsm_channel *ch; - u8 isr; - u8 cause; - unsigned long lock_flags; - - if (!brd) - return; - - if (port > brd->maxports) - return; - - ch = brd->channels[port]; - if (!ch) - return; - - /* Here we try to figure out what caused the interrupt to happen */ - while (1) { - - isr = readb(&ch->ch_neo_uart->isr_fcr); - - /* Bail if no pending interrupt */ - if (isr & UART_IIR_NO_INT) - break; - - /* - * Yank off the upper 2 bits, which just show that the FIFO's are enabled. - */ - isr &= ~(UART_17158_IIR_FIFO_ENABLED); - - jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev, - "%s:%d isr: %x\n", __FILE__, __LINE__, isr); - - if (isr & (UART_17158_IIR_RDI_TIMEOUT | UART_IIR_RDI)) { - /* Read data from uart -> queue */ - neo_copy_data_from_uart_to_queue(ch); - - /* Call our tty layer to enforce queue flow control if needed. */ - spin_lock_irqsave(&ch->ch_lock, lock_flags); - jsm_check_queue_flow_control(ch); - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - } - - if (isr & UART_IIR_THRI) { - /* Transfer data (if any) from Write Queue -> UART. */ - spin_lock_irqsave(&ch->ch_lock, lock_flags); - ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - neo_copy_data_from_queue_to_uart(ch); - } - - if (isr & UART_17158_IIR_XONXOFF) { - cause = readb(&ch->ch_neo_uart->xoffchar1); - - jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev, - "Port %d. Got ISR_XONXOFF: cause:%x\n", port, cause); - - /* - * Since the UART detected either an XON or - * XOFF match, we need to figure out which - * one it was, so we can suspend or resume data flow. - */ - spin_lock_irqsave(&ch->ch_lock, lock_flags); - if (cause == UART_17158_XON_DETECT) { - /* Is output stopped right now, if so, resume it */ - if (brd->channels[port]->ch_flags & CH_STOP) { - ch->ch_flags &= ~(CH_STOP); - } - jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev, - "Port %d. XON detected in incoming data\n", port); - } - else if (cause == UART_17158_XOFF_DETECT) { - if (!(brd->channels[port]->ch_flags & CH_STOP)) { - ch->ch_flags |= CH_STOP; - jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev, - "Setting CH_STOP\n"); - } - jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev, - "Port: %d. XOFF detected in incoming data\n", port); - } - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - } - - if (isr & UART_17158_IIR_HWFLOW_STATE_CHANGE) { - /* - * If we get here, this means the hardware is doing auto flow control. - * Check to see whether RTS/DTR or CTS/DSR caused this interrupt. - */ - cause = readb(&ch->ch_neo_uart->mcr); - - /* Which pin is doing auto flow? RTS or DTR? */ - spin_lock_irqsave(&ch->ch_lock, lock_flags); - if ((cause & 0x4) == 0) { - if (cause & UART_MCR_RTS) - ch->ch_mostat |= UART_MCR_RTS; - else - ch->ch_mostat &= ~(UART_MCR_RTS); - } else { - if (cause & UART_MCR_DTR) - ch->ch_mostat |= UART_MCR_DTR; - else - ch->ch_mostat &= ~(UART_MCR_DTR); - } - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - } - - /* Parse any modem signal changes */ - jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev, - "MOD_STAT: sending to parse_modem_sigs\n"); - neo_parse_modem(ch, readb(&ch->ch_neo_uart->msr)); - } -} - -static inline void neo_parse_lsr(struct jsm_board *brd, u32 port) -{ - struct jsm_channel *ch; - int linestatus; - unsigned long lock_flags; - - if (!brd) - return; - - if (port > brd->maxports) - return; - - ch = brd->channels[port]; - if (!ch) - return; - - linestatus = readb(&ch->ch_neo_uart->lsr); - - jsm_printk(INTR, INFO, &ch->ch_bd->pci_dev, - "%s:%d port: %d linestatus: %x\n", __FILE__, __LINE__, port, linestatus); - - ch->ch_cached_lsr |= linestatus; - - if (ch->ch_cached_lsr & UART_LSR_DR) { - /* Read data from uart -> queue */ - neo_copy_data_from_uart_to_queue(ch); - spin_lock_irqsave(&ch->ch_lock, lock_flags); - jsm_check_queue_flow_control(ch); - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - } - - /* - * This is a special flag. It indicates that at least 1 - * RX error (parity, framing, or break) has happened. - * Mark this in our struct, which will tell me that I have - *to do the special RX+LSR read for this FIFO load. - */ - if (linestatus & UART_17158_RX_FIFO_DATA_ERROR) - jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev, - "%s:%d Port: %d Got an RX error, need to parse LSR\n", - __FILE__, __LINE__, port); - - /* - * The next 3 tests should *NOT* happen, as the above test - * should encapsulate all 3... At least, thats what Exar says. - */ - - if (linestatus & UART_LSR_PE) { - ch->ch_err_parity++; - jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev, - "%s:%d Port: %d. PAR ERR!\n", __FILE__, __LINE__, port); - } - - if (linestatus & UART_LSR_FE) { - ch->ch_err_frame++; - jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev, - "%s:%d Port: %d. FRM ERR!\n", __FILE__, __LINE__, port); - } - - if (linestatus & UART_LSR_BI) { - ch->ch_err_break++; - jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev, - "%s:%d Port: %d. BRK INTR!\n", __FILE__, __LINE__, port); - } - - if (linestatus & UART_LSR_OE) { - /* - * Rx Oruns. Exar says that an orun will NOT corrupt - * the FIFO. It will just replace the holding register - * with this new data byte. So basically just ignore this. - * Probably we should eventually have an orun stat in our driver... - */ - ch->ch_err_overrun++; - jsm_printk(INTR, DEBUG, &ch->ch_bd->pci_dev, - "%s:%d Port: %d. Rx Overrun!\n", __FILE__, __LINE__, port); - } - - if (linestatus & UART_LSR_THRE) { - spin_lock_irqsave(&ch->ch_lock, lock_flags); - ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - - /* Transfer data (if any) from Write Queue -> UART. */ - neo_copy_data_from_queue_to_uart(ch); - } - else if (linestatus & UART_17158_TX_AND_FIFO_CLR) { - spin_lock_irqsave(&ch->ch_lock, lock_flags); - ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - - /* Transfer data (if any) from Write Queue -> UART. */ - neo_copy_data_from_queue_to_uart(ch); - } -} - -/* - * neo_param() - * Send any/all changes to the line to the UART. - */ -static void neo_param(struct jsm_channel *ch) -{ - u8 lcr = 0; - u8 uart_lcr, ier; - u32 baud; - int quot; - struct jsm_board *bd; - - bd = ch->ch_bd; - if (!bd) - return; - - /* - * If baud rate is zero, flush queues, and set mval to drop DTR. - */ - if ((ch->ch_c_cflag & (CBAUD)) == 0) { - ch->ch_r_head = ch->ch_r_tail = 0; - ch->ch_e_head = ch->ch_e_tail = 0; - ch->ch_w_head = ch->ch_w_tail = 0; - - neo_flush_uart_write(ch); - neo_flush_uart_read(ch); - - ch->ch_flags |= (CH_BAUD0); - ch->ch_mostat &= ~(UART_MCR_RTS | UART_MCR_DTR); - neo_assert_modem_signals(ch); - return; - - } else { - int i; - unsigned int cflag; - static struct { - unsigned int rate; - unsigned int cflag; - } baud_rates[] = { - { 921600, B921600 }, - { 460800, B460800 }, - { 230400, B230400 }, - { 115200, B115200 }, - { 57600, B57600 }, - { 38400, B38400 }, - { 19200, B19200 }, - { 9600, B9600 }, - { 4800, B4800 }, - { 2400, B2400 }, - { 1200, B1200 }, - { 600, B600 }, - { 300, B300 }, - { 200, B200 }, - { 150, B150 }, - { 134, B134 }, - { 110, B110 }, - { 75, B75 }, - { 50, B50 }, - }; - - cflag = C_BAUD(ch->uart_port.state->port.tty); - baud = 9600; - for (i = 0; i < ARRAY_SIZE(baud_rates); i++) { - if (baud_rates[i].cflag == cflag) { - baud = baud_rates[i].rate; - break; - } - } - - if (ch->ch_flags & CH_BAUD0) - ch->ch_flags &= ~(CH_BAUD0); - } - - if (ch->ch_c_cflag & PARENB) - lcr |= UART_LCR_PARITY; - - if (!(ch->ch_c_cflag & PARODD)) - lcr |= UART_LCR_EPAR; - - /* - * Not all platforms support mark/space parity, - * so this will hide behind an ifdef. - */ -#ifdef CMSPAR - if (ch->ch_c_cflag & CMSPAR) - lcr |= UART_LCR_SPAR; -#endif - - if (ch->ch_c_cflag & CSTOPB) - lcr |= UART_LCR_STOP; - - switch (ch->ch_c_cflag & CSIZE) { - case CS5: - lcr |= UART_LCR_WLEN5; - break; - case CS6: - lcr |= UART_LCR_WLEN6; - break; - case CS7: - lcr |= UART_LCR_WLEN7; - break; - case CS8: - default: - lcr |= UART_LCR_WLEN8; - break; - } - - ier = readb(&ch->ch_neo_uart->ier); - uart_lcr = readb(&ch->ch_neo_uart->lcr); - - if (baud == 0) - baud = 9600; - - quot = ch->ch_bd->bd_dividend / baud; - - if (quot != 0) { - writeb(UART_LCR_DLAB, &ch->ch_neo_uart->lcr); - writeb((quot & 0xff), &ch->ch_neo_uart->txrx); - writeb((quot >> 8), &ch->ch_neo_uart->ier); - writeb(lcr, &ch->ch_neo_uart->lcr); - } - - if (uart_lcr != lcr) - writeb(lcr, &ch->ch_neo_uart->lcr); - - if (ch->ch_c_cflag & CREAD) - ier |= (UART_IER_RDI | UART_IER_RLSI); - - ier |= (UART_IER_THRI | UART_IER_MSI); - - writeb(ier, &ch->ch_neo_uart->ier); - - /* Set new start/stop chars */ - neo_set_new_start_stop_chars(ch); - - if (ch->ch_c_cflag & CRTSCTS) - neo_set_cts_flow_control(ch); - else if (ch->ch_c_iflag & IXON) { - /* If start/stop is set to disable, then we should disable flow control */ - if ((ch->ch_startc == __DISABLED_CHAR) || (ch->ch_stopc == __DISABLED_CHAR)) - neo_set_no_output_flow_control(ch); - else - neo_set_ixon_flow_control(ch); - } - else - neo_set_no_output_flow_control(ch); - - if (ch->ch_c_cflag & CRTSCTS) - neo_set_rts_flow_control(ch); - else if (ch->ch_c_iflag & IXOFF) { - /* If start/stop is set to disable, then we should disable flow control */ - if ((ch->ch_startc == __DISABLED_CHAR) || (ch->ch_stopc == __DISABLED_CHAR)) - neo_set_no_input_flow_control(ch); - else - neo_set_ixoff_flow_control(ch); - } - else - neo_set_no_input_flow_control(ch); - /* - * Adjust the RX FIFO Trigger level if baud is less than 9600. - * Not exactly elegant, but this is needed because of the Exar chip's - * delay on firing off the RX FIFO interrupt on slower baud rates. - */ - if (baud < 9600) { - writeb(1, &ch->ch_neo_uart->rfifo); - ch->ch_r_tlevel = 1; - } - - neo_assert_modem_signals(ch); - - /* Get current status of the modem signals now */ - neo_parse_modem(ch, readb(&ch->ch_neo_uart->msr)); - return; -} - -/* - * jsm_neo_intr() - * - * Neo specific interrupt handler. - */ -static irqreturn_t neo_intr(int irq, void *voidbrd) -{ - struct jsm_board *brd = voidbrd; - struct jsm_channel *ch; - int port = 0; - int type = 0; - int current_port; - u32 tmp; - u32 uart_poll; - unsigned long lock_flags; - unsigned long lock_flags2; - int outofloop_count = 0; - - /* Lock out the slow poller from running on this board. */ - spin_lock_irqsave(&brd->bd_intr_lock, lock_flags); - - /* - * Read in "extended" IRQ information from the 32bit Neo register. - * Bits 0-7: What port triggered the interrupt. - * Bits 8-31: Each 3bits indicate what type of interrupt occurred. - */ - uart_poll = readl(brd->re_map_membase + UART_17158_POLL_ADDR_OFFSET); - - jsm_printk(INTR, INFO, &brd->pci_dev, - "%s:%d uart_poll: %x\n", __FILE__, __LINE__, uart_poll); - - if (!uart_poll) { - jsm_printk(INTR, INFO, &brd->pci_dev, - "Kernel interrupted to me, but no pending interrupts...\n"); - spin_unlock_irqrestore(&brd->bd_intr_lock, lock_flags); - return IRQ_NONE; - } - - /* At this point, we have at least SOMETHING to service, dig further... */ - - current_port = 0; - - /* Loop on each port */ - while (((uart_poll & 0xff) != 0) && (outofloop_count < 0xff)){ - - tmp = uart_poll; - outofloop_count++; - - /* Check current port to see if it has interrupt pending */ - if ((tmp & jsm_offset_table[current_port]) != 0) { - port = current_port; - type = tmp >> (8 + (port * 3)); - type &= 0x7; - } else { - current_port++; - continue; - } - - jsm_printk(INTR, INFO, &brd->pci_dev, - "%s:%d port: %x type: %x\n", __FILE__, __LINE__, port, type); - - /* Remove this port + type from uart_poll */ - uart_poll &= ~(jsm_offset_table[port]); - - if (!type) { - /* If no type, just ignore it, and move onto next port */ - jsm_printk(INTR, ERR, &brd->pci_dev, - "Interrupt with no type! port: %d\n", port); - continue; - } - - /* Switch on type of interrupt we have */ - switch (type) { - - case UART_17158_RXRDY_TIMEOUT: - /* - * RXRDY Time-out is cleared by reading data in the - * RX FIFO until it falls below the trigger level. - */ - - /* Verify the port is in range. */ - if (port > brd->nasync) - continue; - - ch = brd->channels[port]; - neo_copy_data_from_uart_to_queue(ch); - - /* Call our tty layer to enforce queue flow control if needed. */ - spin_lock_irqsave(&ch->ch_lock, lock_flags2); - jsm_check_queue_flow_control(ch); - spin_unlock_irqrestore(&ch->ch_lock, lock_flags2); - - continue; - - case UART_17158_RX_LINE_STATUS: - /* - * RXRDY and RX LINE Status (logic OR of LSR[4:1]) - */ - neo_parse_lsr(brd, port); - continue; - - case UART_17158_TXRDY: - /* - * TXRDY interrupt clears after reading ISR register for the UART channel. - */ - - /* - * Yes, this is odd... - * Why would I check EVERY possibility of type of - * interrupt, when we know its TXRDY??? - * Becuz for some reason, even tho we got triggered for TXRDY, - * it seems to be occassionally wrong. Instead of TX, which - * it should be, I was getting things like RXDY too. Weird. - */ - neo_parse_isr(brd, port); - continue; - - case UART_17158_MSR: - /* - * MSR or flow control was seen. - */ - neo_parse_isr(brd, port); - continue; - - default: - /* - * The UART triggered us with a bogus interrupt type. - * It appears the Exar chip, when REALLY bogged down, will throw - * these once and awhile. - * Its harmless, just ignore it and move on. - */ - jsm_printk(INTR, ERR, &brd->pci_dev, - "%s:%d Unknown Interrupt type: %x\n", __FILE__, __LINE__, type); - continue; - } - } - - spin_unlock_irqrestore(&brd->bd_intr_lock, lock_flags); - - jsm_printk(INTR, INFO, &brd->pci_dev, "finish.\n"); - return IRQ_HANDLED; -} - -/* - * Neo specific way of turning off the receiver. - * Used as a way to enforce queue flow control when in - * hardware flow control mode. - */ -static void neo_disable_receiver(struct jsm_channel *ch) -{ - u8 tmp = readb(&ch->ch_neo_uart->ier); - tmp &= ~(UART_IER_RDI); - writeb(tmp, &ch->ch_neo_uart->ier); - - /* flush write operation */ - neo_pci_posting_flush(ch->ch_bd); -} - - -/* - * Neo specific way of turning on the receiver. - * Used as a way to un-enforce queue flow control when in - * hardware flow control mode. - */ -static void neo_enable_receiver(struct jsm_channel *ch) -{ - u8 tmp = readb(&ch->ch_neo_uart->ier); - tmp |= (UART_IER_RDI); - writeb(tmp, &ch->ch_neo_uart->ier); - - /* flush write operation */ - neo_pci_posting_flush(ch->ch_bd); -} - -static void neo_send_start_character(struct jsm_channel *ch) -{ - if (!ch) - return; - - if (ch->ch_startc != __DISABLED_CHAR) { - ch->ch_xon_sends++; - writeb(ch->ch_startc, &ch->ch_neo_uart->txrx); - - /* flush write operation */ - neo_pci_posting_flush(ch->ch_bd); - } -} - -static void neo_send_stop_character(struct jsm_channel *ch) -{ - if (!ch) - return; - - if (ch->ch_stopc != __DISABLED_CHAR) { - ch->ch_xoff_sends++; - writeb(ch->ch_stopc, &ch->ch_neo_uart->txrx); - - /* flush write operation */ - neo_pci_posting_flush(ch->ch_bd); - } -} - -/* - * neo_uart_init - */ -static void neo_uart_init(struct jsm_channel *ch) -{ - writeb(0, &ch->ch_neo_uart->ier); - writeb(0, &ch->ch_neo_uart->efr); - writeb(UART_EFR_ECB, &ch->ch_neo_uart->efr); - - /* Clear out UART and FIFO */ - readb(&ch->ch_neo_uart->txrx); - writeb((UART_FCR_ENABLE_FIFO|UART_FCR_CLEAR_RCVR|UART_FCR_CLEAR_XMIT), &ch->ch_neo_uart->isr_fcr); - readb(&ch->ch_neo_uart->lsr); - readb(&ch->ch_neo_uart->msr); - - ch->ch_flags |= CH_FIFO_ENABLED; - - /* Assert any signals we want up */ - writeb(ch->ch_mostat, &ch->ch_neo_uart->mcr); -} - -/* - * Make the UART completely turn off. - */ -static void neo_uart_off(struct jsm_channel *ch) -{ - /* Turn off UART enhanced bits */ - writeb(0, &ch->ch_neo_uart->efr); - - /* Stop all interrupts from occurring. */ - writeb(0, &ch->ch_neo_uart->ier); -} - -static u32 neo_get_uart_bytes_left(struct jsm_channel *ch) -{ - u8 left = 0; - u8 lsr = readb(&ch->ch_neo_uart->lsr); - - /* We must cache the LSR as some of the bits get reset once read... */ - ch->ch_cached_lsr |= lsr; - - /* Determine whether the Transmitter is empty or not */ - if (!(lsr & UART_LSR_TEMT)) - left = 1; - else { - ch->ch_flags |= (CH_TX_FIFO_EMPTY | CH_TX_FIFO_LWM); - left = 0; - } - - return left; -} - -/* Channel lock MUST be held by the calling function! */ -static void neo_send_break(struct jsm_channel *ch) -{ - /* - * Set the time we should stop sending the break. - * If we are already sending a break, toss away the existing - * time to stop, and use this new value instead. - */ - - /* Tell the UART to start sending the break */ - if (!(ch->ch_flags & CH_BREAK_SENDING)) { - u8 temp = readb(&ch->ch_neo_uart->lcr); - writeb((temp | UART_LCR_SBC), &ch->ch_neo_uart->lcr); - ch->ch_flags |= (CH_BREAK_SENDING); - - /* flush write operation */ - neo_pci_posting_flush(ch->ch_bd); - } -} - -/* - * neo_send_immediate_char. - * - * Sends a specific character as soon as possible to the UART, - * jumping over any bytes that might be in the write queue. - * - * The channel lock MUST be held by the calling function. - */ -static void neo_send_immediate_char(struct jsm_channel *ch, unsigned char c) -{ - if (!ch) - return; - - writeb(c, &ch->ch_neo_uart->txrx); - - /* flush write operation */ - neo_pci_posting_flush(ch->ch_bd); -} - -struct board_ops jsm_neo_ops = { - .intr = neo_intr, - .uart_init = neo_uart_init, - .uart_off = neo_uart_off, - .param = neo_param, - .assert_modem_signals = neo_assert_modem_signals, - .flush_uart_write = neo_flush_uart_write, - .flush_uart_read = neo_flush_uart_read, - .disable_receiver = neo_disable_receiver, - .enable_receiver = neo_enable_receiver, - .send_break = neo_send_break, - .clear_break = neo_clear_break, - .send_start_character = neo_send_start_character, - .send_stop_character = neo_send_stop_character, - .copy_data_from_queue_to_uart = neo_copy_data_from_queue_to_uart, - .get_uart_bytes_left = neo_get_uart_bytes_left, - .send_immediate_char = neo_send_immediate_char -}; diff --git a/drivers/serial/jsm/jsm_tty.c b/drivers/serial/jsm/jsm_tty.c deleted file mode 100644 index 7a4a914ecff0..000000000000 --- a/drivers/serial/jsm/jsm_tty.c +++ /dev/null @@ -1,910 +0,0 @@ -/************************************************************************ - * Copyright 2003 Digi International (www.digi.com) - * - * Copyright (C) 2004 IBM Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the - * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR - * PURPOSE. See the GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 * Temple Place - Suite 330, Boston, - * MA 02111-1307, USA. - * - * Contact Information: - * Scott H Kilau <Scott_Kilau@digi.com> - * Ananda Venkatarman <mansarov@us.ibm.com> - * Modifications: - * 01/19/06: changed jsm_input routine to use the dynamically allocated - * tty_buffer changes. Contributors: Scott Kilau and Ananda V. - ***********************************************************************/ -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_reg.h> -#include <linux/delay.h> /* For udelay */ -#include <linux/pci.h> -#include <linux/slab.h> - -#include "jsm.h" - -static DECLARE_BITMAP(linemap, MAXLINES); - -static void jsm_carrier(struct jsm_channel *ch); - -static inline int jsm_get_mstat(struct jsm_channel *ch) -{ - unsigned char mstat; - unsigned result; - - jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, "start\n"); - - mstat = (ch->ch_mostat | ch->ch_mistat); - - result = 0; - - if (mstat & UART_MCR_DTR) - result |= TIOCM_DTR; - if (mstat & UART_MCR_RTS) - result |= TIOCM_RTS; - if (mstat & UART_MSR_CTS) - result |= TIOCM_CTS; - if (mstat & UART_MSR_DSR) - result |= TIOCM_DSR; - if (mstat & UART_MSR_RI) - result |= TIOCM_RI; - if (mstat & UART_MSR_DCD) - result |= TIOCM_CD; - - jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, "finish\n"); - return result; -} - -static unsigned int jsm_tty_tx_empty(struct uart_port *port) -{ - return TIOCSER_TEMT; -} - -/* - * Return modem signals to ld. - */ -static unsigned int jsm_tty_get_mctrl(struct uart_port *port) -{ - int result; - struct jsm_channel *channel = (struct jsm_channel *)port; - - jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n"); - - result = jsm_get_mstat(channel); - - if (result < 0) - return -ENXIO; - - jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n"); - - return result; -} - -/* - * jsm_set_modem_info() - * - * Set modem signals, called by ld. - */ -static void jsm_tty_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct jsm_channel *channel = (struct jsm_channel *)port; - - jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n"); - - if (mctrl & TIOCM_RTS) - channel->ch_mostat |= UART_MCR_RTS; - else - channel->ch_mostat &= ~UART_MCR_RTS; - - if (mctrl & TIOCM_DTR) - channel->ch_mostat |= UART_MCR_DTR; - else - channel->ch_mostat &= ~UART_MCR_DTR; - - channel->ch_bd->bd_ops->assert_modem_signals(channel); - - jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n"); - udelay(10); -} - -static void jsm_tty_start_tx(struct uart_port *port) -{ - struct jsm_channel *channel = (struct jsm_channel *)port; - - jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n"); - - channel->ch_flags &= ~(CH_STOP); - jsm_tty_write(port); - - jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n"); -} - -static void jsm_tty_stop_tx(struct uart_port *port) -{ - struct jsm_channel *channel = (struct jsm_channel *)port; - - jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "start\n"); - - channel->ch_flags |= (CH_STOP); - - jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n"); -} - -static void jsm_tty_send_xchar(struct uart_port *port, char ch) -{ - unsigned long lock_flags; - struct jsm_channel *channel = (struct jsm_channel *)port; - struct ktermios *termios; - - spin_lock_irqsave(&port->lock, lock_flags); - termios = port->state->port.tty->termios; - if (ch == termios->c_cc[VSTART]) - channel->ch_bd->bd_ops->send_start_character(channel); - - if (ch == termios->c_cc[VSTOP]) - channel->ch_bd->bd_ops->send_stop_character(channel); - spin_unlock_irqrestore(&port->lock, lock_flags); -} - -static void jsm_tty_stop_rx(struct uart_port *port) -{ - struct jsm_channel *channel = (struct jsm_channel *)port; - - channel->ch_bd->bd_ops->disable_receiver(channel); -} - -static void jsm_tty_enable_ms(struct uart_port *port) -{ - /* Nothing needed */ -} - -static void jsm_tty_break(struct uart_port *port, int break_state) -{ - unsigned long lock_flags; - struct jsm_channel *channel = (struct jsm_channel *)port; - - spin_lock_irqsave(&port->lock, lock_flags); - if (break_state == -1) - channel->ch_bd->bd_ops->send_break(channel); - else - channel->ch_bd->bd_ops->clear_break(channel, 0); - - spin_unlock_irqrestore(&port->lock, lock_flags); -} - -static int jsm_tty_open(struct uart_port *port) -{ - struct jsm_board *brd; - struct jsm_channel *channel = (struct jsm_channel *)port; - struct ktermios *termios; - - /* Get board pointer from our array of majors we have allocated */ - brd = channel->ch_bd; - - /* - * Allocate channel buffers for read/write/error. - * Set flag, so we don't get trounced on. - */ - channel->ch_flags |= (CH_OPENING); - - /* Drop locks, as malloc with GFP_KERNEL can sleep */ - - if (!channel->ch_rqueue) { - channel->ch_rqueue = kzalloc(RQUEUESIZE, GFP_KERNEL); - if (!channel->ch_rqueue) { - jsm_printk(INIT, ERR, &channel->ch_bd->pci_dev, - "unable to allocate read queue buf"); - return -ENOMEM; - } - } - if (!channel->ch_equeue) { - channel->ch_equeue = kzalloc(EQUEUESIZE, GFP_KERNEL); - if (!channel->ch_equeue) { - jsm_printk(INIT, ERR, &channel->ch_bd->pci_dev, - "unable to allocate error queue buf"); - return -ENOMEM; - } - } - if (!channel->ch_wqueue) { - channel->ch_wqueue = kzalloc(WQUEUESIZE, GFP_KERNEL); - if (!channel->ch_wqueue) { - jsm_printk(INIT, ERR, &channel->ch_bd->pci_dev, - "unable to allocate write queue buf"); - return -ENOMEM; - } - } - - channel->ch_flags &= ~(CH_OPENING); - /* - * Initialize if neither terminal is open. - */ - jsm_printk(OPEN, INFO, &channel->ch_bd->pci_dev, - "jsm_open: initializing channel in open...\n"); - - /* - * Flush input queues. - */ - channel->ch_r_head = channel->ch_r_tail = 0; - channel->ch_e_head = channel->ch_e_tail = 0; - channel->ch_w_head = channel->ch_w_tail = 0; - - brd->bd_ops->flush_uart_write(channel); - brd->bd_ops->flush_uart_read(channel); - - channel->ch_flags = 0; - channel->ch_cached_lsr = 0; - channel->ch_stops_sent = 0; - - termios = port->state->port.tty->termios; - channel->ch_c_cflag = termios->c_cflag; - channel->ch_c_iflag = termios->c_iflag; - channel->ch_c_oflag = termios->c_oflag; - channel->ch_c_lflag = termios->c_lflag; - channel->ch_startc = termios->c_cc[VSTART]; - channel->ch_stopc = termios->c_cc[VSTOP]; - - /* Tell UART to init itself */ - brd->bd_ops->uart_init(channel); - - /* - * Run param in case we changed anything - */ - brd->bd_ops->param(channel); - - jsm_carrier(channel); - - channel->ch_open_count++; - - jsm_printk(OPEN, INFO, &channel->ch_bd->pci_dev, "finish\n"); - return 0; -} - -static void jsm_tty_close(struct uart_port *port) -{ - struct jsm_board *bd; - struct ktermios *ts; - struct jsm_channel *channel = (struct jsm_channel *)port; - - jsm_printk(CLOSE, INFO, &channel->ch_bd->pci_dev, "start\n"); - - bd = channel->ch_bd; - ts = port->state->port.tty->termios; - - channel->ch_flags &= ~(CH_STOPI); - - channel->ch_open_count--; - - /* - * If we have HUPCL set, lower DTR and RTS - */ - if (channel->ch_c_cflag & HUPCL) { - jsm_printk(CLOSE, INFO, &channel->ch_bd->pci_dev, - "Close. HUPCL set, dropping DTR/RTS\n"); - - /* Drop RTS/DTR */ - channel->ch_mostat &= ~(UART_MCR_DTR | UART_MCR_RTS); - bd->bd_ops->assert_modem_signals(channel); - } - - /* Turn off UART interrupts for this port */ - channel->ch_bd->bd_ops->uart_off(channel); - - jsm_printk(CLOSE, INFO, &channel->ch_bd->pci_dev, "finish\n"); -} - -static void jsm_tty_set_termios(struct uart_port *port, - struct ktermios *termios, - struct ktermios *old_termios) -{ - unsigned long lock_flags; - struct jsm_channel *channel = (struct jsm_channel *)port; - - spin_lock_irqsave(&port->lock, lock_flags); - channel->ch_c_cflag = termios->c_cflag; - channel->ch_c_iflag = termios->c_iflag; - channel->ch_c_oflag = termios->c_oflag; - channel->ch_c_lflag = termios->c_lflag; - channel->ch_startc = termios->c_cc[VSTART]; - channel->ch_stopc = termios->c_cc[VSTOP]; - - channel->ch_bd->bd_ops->param(channel); - jsm_carrier(channel); - spin_unlock_irqrestore(&port->lock, lock_flags); -} - -static const char *jsm_tty_type(struct uart_port *port) -{ - return "jsm"; -} - -static void jsm_tty_release_port(struct uart_port *port) -{ -} - -static int jsm_tty_request_port(struct uart_port *port) -{ - return 0; -} - -static void jsm_config_port(struct uart_port *port, int flags) -{ - port->type = PORT_JSM; -} - -static struct uart_ops jsm_ops = { - .tx_empty = jsm_tty_tx_empty, - .set_mctrl = jsm_tty_set_mctrl, - .get_mctrl = jsm_tty_get_mctrl, - .stop_tx = jsm_tty_stop_tx, - .start_tx = jsm_tty_start_tx, - .send_xchar = jsm_tty_send_xchar, - .stop_rx = jsm_tty_stop_rx, - .enable_ms = jsm_tty_enable_ms, - .break_ctl = jsm_tty_break, - .startup = jsm_tty_open, - .shutdown = jsm_tty_close, - .set_termios = jsm_tty_set_termios, - .type = jsm_tty_type, - .release_port = jsm_tty_release_port, - .request_port = jsm_tty_request_port, - .config_port = jsm_config_port, -}; - -/* - * jsm_tty_init() - * - * Init the tty subsystem. Called once per board after board has been - * downloaded and init'ed. - */ -int __devinit jsm_tty_init(struct jsm_board *brd) -{ - int i; - void __iomem *vaddr; - struct jsm_channel *ch; - - if (!brd) - return -ENXIO; - - jsm_printk(INIT, INFO, &brd->pci_dev, "start\n"); - - /* - * Initialize board structure elements. - */ - - brd->nasync = brd->maxports; - - /* - * Allocate channel memory that might not have been allocated - * when the driver was first loaded. - */ - for (i = 0; i < brd->nasync; i++) { - if (!brd->channels[i]) { - - /* - * Okay to malloc with GFP_KERNEL, we are not at - * interrupt context, and there are no locks held. - */ - brd->channels[i] = kzalloc(sizeof(struct jsm_channel), GFP_KERNEL); - if (!brd->channels[i]) { - jsm_printk(CORE, ERR, &brd->pci_dev, - "%s:%d Unable to allocate memory for channel struct\n", - __FILE__, __LINE__); - } - } - } - - ch = brd->channels[0]; - vaddr = brd->re_map_membase; - - /* Set up channel variables */ - for (i = 0; i < brd->nasync; i++, ch = brd->channels[i]) { - - if (!brd->channels[i]) - continue; - - spin_lock_init(&ch->ch_lock); - - if (brd->bd_uart_offset == 0x200) - ch->ch_neo_uart = vaddr + (brd->bd_uart_offset * i); - - ch->ch_bd = brd; - ch->ch_portnum = i; - - /* .25 second delay */ - ch->ch_close_delay = 250; - - init_waitqueue_head(&ch->ch_flags_wait); - } - - jsm_printk(INIT, INFO, &brd->pci_dev, "finish\n"); - return 0; -} - -int jsm_uart_port_init(struct jsm_board *brd) -{ - int i, rc; - unsigned int line; - struct jsm_channel *ch; - - if (!brd) - return -ENXIO; - - jsm_printk(INIT, INFO, &brd->pci_dev, "start\n"); - - /* - * Initialize board structure elements. - */ - - brd->nasync = brd->maxports; - - /* Set up channel variables */ - for (i = 0; i < brd->nasync; i++, ch = brd->channels[i]) { - - if (!brd->channels[i]) - continue; - - brd->channels[i]->uart_port.irq = brd->irq; - brd->channels[i]->uart_port.uartclk = 14745600; - brd->channels[i]->uart_port.type = PORT_JSM; - brd->channels[i]->uart_port.iotype = UPIO_MEM; - brd->channels[i]->uart_port.membase = brd->re_map_membase; - brd->channels[i]->uart_port.fifosize = 16; - brd->channels[i]->uart_port.ops = &jsm_ops; - line = find_first_zero_bit(linemap, MAXLINES); - if (line >= MAXLINES) { - printk(KERN_INFO "jsm: linemap is full, added device failed\n"); - continue; - } else - set_bit(line, linemap); - brd->channels[i]->uart_port.line = line; - rc = uart_add_one_port (&jsm_uart_driver, &brd->channels[i]->uart_port); - if (rc){ - printk(KERN_INFO "jsm: Port %d failed. Aborting...\n", i); - return rc; - } - else - printk(KERN_INFO "jsm: Port %d added\n", i); - } - - jsm_printk(INIT, INFO, &brd->pci_dev, "finish\n"); - return 0; -} - -int jsm_remove_uart_port(struct jsm_board *brd) -{ - int i; - struct jsm_channel *ch; - - if (!brd) - return -ENXIO; - - jsm_printk(INIT, INFO, &brd->pci_dev, "start\n"); - - /* - * Initialize board structure elements. - */ - - brd->nasync = brd->maxports; - - /* Set up channel variables */ - for (i = 0; i < brd->nasync; i++) { - - if (!brd->channels[i]) - continue; - - ch = brd->channels[i]; - - clear_bit(ch->uart_port.line, linemap); - uart_remove_one_port(&jsm_uart_driver, &brd->channels[i]->uart_port); - } - - jsm_printk(INIT, INFO, &brd->pci_dev, "finish\n"); - return 0; -} - -void jsm_input(struct jsm_channel *ch) -{ - struct jsm_board *bd; - struct tty_struct *tp; - u32 rmask; - u16 head; - u16 tail; - int data_len; - unsigned long lock_flags; - int len = 0; - int n = 0; - int s = 0; - int i = 0; - - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "start\n"); - - if (!ch) - return; - - tp = ch->uart_port.state->port.tty; - - bd = ch->ch_bd; - if(!bd) - return; - - spin_lock_irqsave(&ch->ch_lock, lock_flags); - - /* - *Figure the number of characters in the buffer. - *Exit immediately if none. - */ - - rmask = RQUEUEMASK; - - head = ch->ch_r_head & rmask; - tail = ch->ch_r_tail & rmask; - - data_len = (head - tail) & rmask; - if (data_len == 0) { - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - return; - } - - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "start\n"); - - /* - *If the device is not open, or CREAD is off, flush - *input data and return immediately. - */ - if (!tp || - !(tp->termios->c_cflag & CREAD) ) { - - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, - "input. dropping %d bytes on port %d...\n", data_len, ch->ch_portnum); - ch->ch_r_head = tail; - - /* Force queue flow control to be released, if needed */ - jsm_check_queue_flow_control(ch); - - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - return; - } - - /* - * If we are throttled, simply don't read any data. - */ - if (ch->ch_flags & CH_STOPI) { - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, - "Port %d throttled, not reading any data. head: %x tail: %x\n", - ch->ch_portnum, head, tail); - return; - } - - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "start 2\n"); - - if (data_len <= 0) { - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "jsm_input 1\n"); - return; - } - - len = tty_buffer_request_room(tp, data_len); - n = len; - - /* - * n now contains the most amount of data we can copy, - * bounded either by the flip buffer size or the amount - * of data the card actually has pending... - */ - while (n) { - s = ((head >= tail) ? head : RQUEUESIZE) - tail; - s = min(s, n); - - if (s <= 0) - break; - - /* - * If conditions are such that ld needs to see all - * UART errors, we will have to walk each character - * and error byte and send them to the buffer one at - * a time. - */ - - if (I_PARMRK(tp) || I_BRKINT(tp) || I_INPCK(tp)) { - for (i = 0; i < s; i++) { - /* - * Give the Linux ld the flags in the - * format it likes. - */ - if (*(ch->ch_equeue +tail +i) & UART_LSR_BI) - tty_insert_flip_char(tp, *(ch->ch_rqueue +tail +i), TTY_BREAK); - else if (*(ch->ch_equeue +tail +i) & UART_LSR_PE) - tty_insert_flip_char(tp, *(ch->ch_rqueue +tail +i), TTY_PARITY); - else if (*(ch->ch_equeue +tail +i) & UART_LSR_FE) - tty_insert_flip_char(tp, *(ch->ch_rqueue +tail +i), TTY_FRAME); - else - tty_insert_flip_char(tp, *(ch->ch_rqueue +tail +i), TTY_NORMAL); - } - } else { - tty_insert_flip_string(tp, ch->ch_rqueue + tail, s) ; - } - tail += s; - n -= s; - /* Flip queue if needed */ - tail &= rmask; - } - - ch->ch_r_tail = tail & rmask; - ch->ch_e_tail = tail & rmask; - jsm_check_queue_flow_control(ch); - spin_unlock_irqrestore(&ch->ch_lock, lock_flags); - - /* Tell the tty layer its okay to "eat" the data now */ - tty_flip_buffer_push(tp); - - jsm_printk(IOCTL, INFO, &ch->ch_bd->pci_dev, "finish\n"); -} - -static void jsm_carrier(struct jsm_channel *ch) -{ - struct jsm_board *bd; - - int virt_carrier = 0; - int phys_carrier = 0; - - jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev, "start\n"); - if (!ch) - return; - - bd = ch->ch_bd; - - if (!bd) - return; - - if (ch->ch_mistat & UART_MSR_DCD) { - jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev, - "mistat: %x D_CD: %x\n", ch->ch_mistat, ch->ch_mistat & UART_MSR_DCD); - phys_carrier = 1; - } - - if (ch->ch_c_cflag & CLOCAL) - virt_carrier = 1; - - jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev, - "DCD: physical: %d virt: %d\n", phys_carrier, virt_carrier); - - /* - * Test for a VIRTUAL carrier transition to HIGH. - */ - if (((ch->ch_flags & CH_FCAR) == 0) && (virt_carrier == 1)) { - - /* - * When carrier rises, wake any threads waiting - * for carrier in the open routine. - */ - - jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev, - "carrier: virt DCD rose\n"); - - if (waitqueue_active(&(ch->ch_flags_wait))) - wake_up_interruptible(&ch->ch_flags_wait); - } - - /* - * Test for a PHYSICAL carrier transition to HIGH. - */ - if (((ch->ch_flags & CH_CD) == 0) && (phys_carrier == 1)) { - - /* - * When carrier rises, wake any threads waiting - * for carrier in the open routine. - */ - - jsm_printk(CARR, INFO, &ch->ch_bd->pci_dev, - "carrier: physical DCD rose\n"); - - if (waitqueue_active(&(ch->ch_flags_wait))) - wake_up_interruptible(&ch->ch_flags_wait); - } - - /* - * Test for a PHYSICAL transition to low, so long as we aren't - * currently ignoring physical transitions (which is what "virtual - * carrier" indicates). - * - * The transition of the virtual carrier to low really doesn't - * matter... it really only means "ignore carrier state", not - * "make pretend that carrier is there". - */ - if ((virt_carrier == 0) && ((ch->ch_flags & CH_CD) != 0) - && (phys_carrier == 0)) { - /* - * When carrier drops: - * - * Drop carrier on all open units. - * - * Flush queues, waking up any task waiting in the - * line discipline. - * - * Send a hangup to the control terminal. - * - * Enable all select calls. - */ - if (waitqueue_active(&(ch->ch_flags_wait))) - wake_up_interruptible(&ch->ch_flags_wait); - } - - /* - * Make sure that our cached values reflect the current reality. - */ - if (virt_carrier == 1) - ch->ch_flags |= CH_FCAR; - else - ch->ch_flags &= ~CH_FCAR; - - if (phys_carrier == 1) - ch->ch_flags |= CH_CD; - else - ch->ch_flags &= ~CH_CD; -} - - -void jsm_check_queue_flow_control(struct jsm_channel *ch) -{ - struct board_ops *bd_ops = ch->ch_bd->bd_ops; - int qleft; - - /* Store how much space we have left in the queue */ - if ((qleft = ch->ch_r_tail - ch->ch_r_head - 1) < 0) - qleft += RQUEUEMASK + 1; - - /* - * Check to see if we should enforce flow control on our queue because - * the ld (or user) isn't reading data out of our queue fast enuf. - * - * NOTE: This is done based on what the current flow control of the - * port is set for. - * - * 1) HWFLOW (RTS) - Turn off the UART's Receive interrupt. - * This will cause the UART's FIFO to back up, and force - * the RTS signal to be dropped. - * 2) SWFLOW (IXOFF) - Keep trying to send a stop character to - * the other side, in hopes it will stop sending data to us. - * 3) NONE - Nothing we can do. We will simply drop any extra data - * that gets sent into us when the queue fills up. - */ - if (qleft < 256) { - /* HWFLOW */ - if (ch->ch_c_cflag & CRTSCTS) { - if(!(ch->ch_flags & CH_RECEIVER_OFF)) { - bd_ops->disable_receiver(ch); - ch->ch_flags |= (CH_RECEIVER_OFF); - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, - "Internal queue hit hilevel mark (%d)! Turning off interrupts.\n", - qleft); - } - } - /* SWFLOW */ - else if (ch->ch_c_iflag & IXOFF) { - if (ch->ch_stops_sent <= MAX_STOPS_SENT) { - bd_ops->send_stop_character(ch); - ch->ch_stops_sent++; - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, - "Sending stop char! Times sent: %x\n", ch->ch_stops_sent); - } - } - } - - /* - * Check to see if we should unenforce flow control because - * ld (or user) finally read enuf data out of our queue. - * - * NOTE: This is done based on what the current flow control of the - * port is set for. - * - * 1) HWFLOW (RTS) - Turn back on the UART's Receive interrupt. - * This will cause the UART's FIFO to raise RTS back up, - * which will allow the other side to start sending data again. - * 2) SWFLOW (IXOFF) - Send a start character to - * the other side, so it will start sending data to us again. - * 3) NONE - Do nothing. Since we didn't do anything to turn off the - * other side, we don't need to do anything now. - */ - if (qleft > (RQUEUESIZE / 2)) { - /* HWFLOW */ - if (ch->ch_c_cflag & CRTSCTS) { - if (ch->ch_flags & CH_RECEIVER_OFF) { - bd_ops->enable_receiver(ch); - ch->ch_flags &= ~(CH_RECEIVER_OFF); - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, - "Internal queue hit lowlevel mark (%d)! Turning on interrupts.\n", - qleft); - } - } - /* SWFLOW */ - else if (ch->ch_c_iflag & IXOFF && ch->ch_stops_sent) { - ch->ch_stops_sent = 0; - bd_ops->send_start_character(ch); - jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "Sending start char!\n"); - } - } -} - -/* - * jsm_tty_write() - * - * Take data from the user or kernel and send it out to the FEP. - * In here exists all the Transparent Print magic as well. - */ -int jsm_tty_write(struct uart_port *port) -{ - int bufcount; - int data_count = 0,data_count1 =0; - u16 head; - u16 tail; - u16 tmask; - u32 remain; - int temp_tail = port->state->xmit.tail; - struct jsm_channel *channel = (struct jsm_channel *)port; - - tmask = WQUEUEMASK; - head = (channel->ch_w_head) & tmask; - tail = (channel->ch_w_tail) & tmask; - - if ((bufcount = tail - head - 1) < 0) - bufcount += WQUEUESIZE; - - bufcount = min(bufcount, 56); - remain = WQUEUESIZE - head; - - data_count = 0; - if (bufcount >= remain) { - bufcount -= remain; - while ((port->state->xmit.head != temp_tail) && - (data_count < remain)) { - channel->ch_wqueue[head++] = - port->state->xmit.buf[temp_tail]; - - temp_tail++; - temp_tail &= (UART_XMIT_SIZE - 1); - data_count++; - } - if (data_count == remain) head = 0; - } - - data_count1 = 0; - if (bufcount > 0) { - remain = bufcount; - while ((port->state->xmit.head != temp_tail) && - (data_count1 < remain)) { - channel->ch_wqueue[head++] = - port->state->xmit.buf[temp_tail]; - - temp_tail++; - temp_tail &= (UART_XMIT_SIZE - 1); - data_count1++; - - } - } - - port->state->xmit.tail = temp_tail; - - data_count += data_count1; - if (data_count) { - head &= tmask; - channel->ch_w_head = head; - } - - if (data_count) { - channel->ch_bd->bd_ops->copy_data_from_queue_to_uart(channel); - } - - return data_count; -} diff --git a/drivers/serial/kgdboc.c b/drivers/serial/kgdboc.c deleted file mode 100644 index 25a8bc565f40..000000000000 --- a/drivers/serial/kgdboc.c +++ /dev/null @@ -1,328 +0,0 @@ -/* - * Based on the same principle as kgdboe using the NETPOLL api, this - * driver uses a console polling api to implement a gdb serial inteface - * which is multiplexed on a console port. - * - * Maintainer: Jason Wessel <jason.wessel@windriver.com> - * - * 2007-2008 (c) Jason Wessel - Wind River Systems, Inc. - * - * This file is licensed under the terms of the GNU General Public - * License version 2. This program is licensed "as is" without any - * warranty of any kind, whether express or implied. - */ -#include <linux/kernel.h> -#include <linux/ctype.h> -#include <linux/kgdb.h> -#include <linux/kdb.h> -#include <linux/tty.h> -#include <linux/console.h> -#include <linux/vt_kern.h> -#include <linux/input.h> - -#define MAX_CONFIG_LEN 40 - -static struct kgdb_io kgdboc_io_ops; - -/* -1 = init not run yet, 0 = unconfigured, 1 = configured. */ -static int configured = -1; - -static char config[MAX_CONFIG_LEN]; -static struct kparam_string kps = { - .string = config, - .maxlen = MAX_CONFIG_LEN, -}; - -static int kgdboc_use_kms; /* 1 if we use kernel mode switching */ -static struct tty_driver *kgdb_tty_driver; -static int kgdb_tty_line; - -#ifdef CONFIG_KDB_KEYBOARD -static int kgdboc_reset_connect(struct input_handler *handler, - struct input_dev *dev, - const struct input_device_id *id) -{ - input_reset_device(dev); - - /* Retrun an error - we do not want to bind, just to reset */ - return -ENODEV; -} - -static void kgdboc_reset_disconnect(struct input_handle *handle) -{ - /* We do not expect anyone to actually bind to us */ - BUG(); -} - -static const struct input_device_id kgdboc_reset_ids[] = { - { - .flags = INPUT_DEVICE_ID_MATCH_EVBIT, - .evbit = { BIT_MASK(EV_KEY) }, - }, - { } -}; - -static struct input_handler kgdboc_reset_handler = { - .connect = kgdboc_reset_connect, - .disconnect = kgdboc_reset_disconnect, - .name = "kgdboc_reset", - .id_table = kgdboc_reset_ids, -}; - -static DEFINE_MUTEX(kgdboc_reset_mutex); - -static void kgdboc_restore_input_helper(struct work_struct *dummy) -{ - /* - * We need to take a mutex to prevent several instances of - * this work running on different CPUs so they don't try - * to register again already registered handler. - */ - mutex_lock(&kgdboc_reset_mutex); - - if (input_register_handler(&kgdboc_reset_handler) == 0) - input_unregister_handler(&kgdboc_reset_handler); - - mutex_unlock(&kgdboc_reset_mutex); -} - -static DECLARE_WORK(kgdboc_restore_input_work, kgdboc_restore_input_helper); - -static void kgdboc_restore_input(void) -{ - if (likely(system_state == SYSTEM_RUNNING)) - schedule_work(&kgdboc_restore_input_work); -} - -static int kgdboc_register_kbd(char **cptr) -{ - if (strncmp(*cptr, "kbd", 3) == 0) { - if (kdb_poll_idx < KDB_POLL_FUNC_MAX) { - kdb_poll_funcs[kdb_poll_idx] = kdb_get_kbd_char; - kdb_poll_idx++; - if (cptr[0][3] == ',') - *cptr += 4; - else - return 1; - } - } - return 0; -} - -static void kgdboc_unregister_kbd(void) -{ - int i; - - for (i = 0; i < kdb_poll_idx; i++) { - if (kdb_poll_funcs[i] == kdb_get_kbd_char) { - kdb_poll_idx--; - kdb_poll_funcs[i] = kdb_poll_funcs[kdb_poll_idx]; - kdb_poll_funcs[kdb_poll_idx] = NULL; - i--; - } - } - flush_work_sync(&kgdboc_restore_input_work); -} -#else /* ! CONFIG_KDB_KEYBOARD */ -#define kgdboc_register_kbd(x) 0 -#define kgdboc_unregister_kbd() -#define kgdboc_restore_input() -#endif /* ! CONFIG_KDB_KEYBOARD */ - -static int kgdboc_option_setup(char *opt) -{ - if (strlen(opt) > MAX_CONFIG_LEN) { - printk(KERN_ERR "kgdboc: config string too long\n"); - return -ENOSPC; - } - strcpy(config, opt); - - return 0; -} - -__setup("kgdboc=", kgdboc_option_setup); - -static void cleanup_kgdboc(void) -{ - kgdboc_unregister_kbd(); - if (configured == 1) - kgdb_unregister_io_module(&kgdboc_io_ops); -} - -static int configure_kgdboc(void) -{ - struct tty_driver *p; - int tty_line = 0; - int err; - char *cptr = config; - struct console *cons; - - err = kgdboc_option_setup(config); - if (err || !strlen(config) || isspace(config[0])) - goto noconfig; - - err = -ENODEV; - kgdboc_io_ops.is_console = 0; - kgdb_tty_driver = NULL; - - kgdboc_use_kms = 0; - if (strncmp(cptr, "kms,", 4) == 0) { - cptr += 4; - kgdboc_use_kms = 1; - } - - if (kgdboc_register_kbd(&cptr)) - goto do_register; - - p = tty_find_polling_driver(cptr, &tty_line); - if (!p) - goto noconfig; - - cons = console_drivers; - while (cons) { - int idx; - if (cons->device && cons->device(cons, &idx) == p && - idx == tty_line) { - kgdboc_io_ops.is_console = 1; - break; - } - cons = cons->next; - } - - kgdb_tty_driver = p; - kgdb_tty_line = tty_line; - -do_register: - err = kgdb_register_io_module(&kgdboc_io_ops); - if (err) - goto noconfig; - - configured = 1; - - return 0; - -noconfig: - config[0] = 0; - configured = 0; - cleanup_kgdboc(); - - return err; -} - -static int __init init_kgdboc(void) -{ - /* Already configured? */ - if (configured == 1) - return 0; - - return configure_kgdboc(); -} - -static int kgdboc_get_char(void) -{ - if (!kgdb_tty_driver) - return -1; - return kgdb_tty_driver->ops->poll_get_char(kgdb_tty_driver, - kgdb_tty_line); -} - -static void kgdboc_put_char(u8 chr) -{ - if (!kgdb_tty_driver) - return; - kgdb_tty_driver->ops->poll_put_char(kgdb_tty_driver, - kgdb_tty_line, chr); -} - -static int param_set_kgdboc_var(const char *kmessage, struct kernel_param *kp) -{ - int len = strlen(kmessage); - - if (len >= MAX_CONFIG_LEN) { - printk(KERN_ERR "kgdboc: config string too long\n"); - return -ENOSPC; - } - - /* Only copy in the string if the init function has not run yet */ - if (configured < 0) { - strcpy(config, kmessage); - return 0; - } - - if (kgdb_connected) { - printk(KERN_ERR - "kgdboc: Cannot reconfigure while KGDB is connected.\n"); - - return -EBUSY; - } - - strcpy(config, kmessage); - /* Chop out \n char as a result of echo */ - if (config[len - 1] == '\n') - config[len - 1] = '\0'; - - if (configured == 1) - cleanup_kgdboc(); - - /* Go and configure with the new params. */ - return configure_kgdboc(); -} - -static int dbg_restore_graphics; - -static void kgdboc_pre_exp_handler(void) -{ - if (!dbg_restore_graphics && kgdboc_use_kms) { - dbg_restore_graphics = 1; - con_debug_enter(vc_cons[fg_console].d); - } - /* Increment the module count when the debugger is active */ - if (!kgdb_connected) - try_module_get(THIS_MODULE); -} - -static void kgdboc_post_exp_handler(void) -{ - /* decrement the module count when the debugger detaches */ - if (!kgdb_connected) - module_put(THIS_MODULE); - if (kgdboc_use_kms && dbg_restore_graphics) { - dbg_restore_graphics = 0; - con_debug_leave(); - } - kgdboc_restore_input(); -} - -static struct kgdb_io kgdboc_io_ops = { - .name = "kgdboc", - .read_char = kgdboc_get_char, - .write_char = kgdboc_put_char, - .pre_exception = kgdboc_pre_exp_handler, - .post_exception = kgdboc_post_exp_handler, -}; - -#ifdef CONFIG_KGDB_SERIAL_CONSOLE -/* This is only available if kgdboc is a built in for early debugging */ -static int __init kgdboc_early_init(char *opt) -{ - /* save the first character of the config string because the - * init routine can destroy it. - */ - char save_ch; - - kgdboc_option_setup(opt); - save_ch = config[0]; - init_kgdboc(); - config[0] = save_ch; - return 0; -} - -early_param("ekgdboc", kgdboc_early_init); -#endif /* CONFIG_KGDB_SERIAL_CONSOLE */ - -module_init(init_kgdboc); -module_exit(cleanup_kgdboc); -module_param_call(kgdboc, param_set_kgdboc_var, param_get_string, &kps, 0644); -MODULE_PARM_DESC(kgdboc, "<serial_device>[,baud]"); -MODULE_DESCRIPTION("KGDB Console TTY Driver"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/m32r_sio.c b/drivers/serial/m32r_sio.c deleted file mode 100644 index bea5c215460c..000000000000 --- a/drivers/serial/m32r_sio.c +++ /dev/null @@ -1,1192 +0,0 @@ -/* - * m32r_sio.c - * - * Driver for M32R serial ports - * - * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. - * Based on drivers/serial/8250.c. - * - * Copyright (C) 2001 Russell King. - * Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -/* - * A note about mapbase / membase - * - * mapbase is the physical address of the IO port. Currently, we don't - * support this very well, and it may well be dropped from this driver - * in future. As such, mapbase should be NULL. - * - * membase is an 'ioremapped' cookie. This is compatible with the old - * serial.c driver, and is currently the preferred form. - */ - -#if defined(CONFIG_SERIAL_M32R_SIO_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/module.h> -#include <linux/tty.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/serial.h> -#include <linux/serialP.h> -#include <linux/delay.h> - -#include <asm/m32r.h> -#include <asm/io.h> -#include <asm/irq.h> - -#define PORT_M32R_BASE PORT_M32R_SIO -#define PORT_INDEX(x) (x - PORT_M32R_BASE + 1) -#define BAUD_RATE 115200 - -#include <linux/serial_core.h> -#include "m32r_sio.h" -#include "m32r_sio_reg.h" - -/* - * Debugging. - */ -#if 0 -#define DEBUG_AUTOCONF(fmt...) printk(fmt) -#else -#define DEBUG_AUTOCONF(fmt...) do { } while (0) -#endif - -#if 0 -#define DEBUG_INTR(fmt...) printk(fmt) -#else -#define DEBUG_INTR(fmt...) do { } while (0) -#endif - -#define PASS_LIMIT 256 - -/* - * We default to IRQ0 for the "no irq" hack. Some - * machine types want others as well - they're free - * to redefine this in their header file. - */ -#define is_real_interrupt(irq) ((irq) != 0) - -#define BASE_BAUD 115200 - -/* Standard COM flags */ -#define STD_COM_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST) - -/* - * SERIAL_PORT_DFNS tells us about built-in ports that have no - * standard enumeration mechanism. Platforms that can find all - * serial ports via mechanisms like ACPI or PCI need not supply it. - */ -#if defined(CONFIG_PLAT_USRV) - -#define SERIAL_PORT_DFNS \ - /* UART CLK PORT IRQ FLAGS */ \ - { 0, BASE_BAUD, 0x3F8, PLD_IRQ_UART0, STD_COM_FLAGS }, /* ttyS0 */ \ - { 0, BASE_BAUD, 0x2F8, PLD_IRQ_UART1, STD_COM_FLAGS }, /* ttyS1 */ - -#else /* !CONFIG_PLAT_USRV */ - -#if defined(CONFIG_SERIAL_M32R_PLDSIO) -#define SERIAL_PORT_DFNS \ - { 0, BASE_BAUD, ((unsigned long)PLD_ESIO0CR), PLD_IRQ_SIO0_RCV, \ - STD_COM_FLAGS }, /* ttyS0 */ -#else -#define SERIAL_PORT_DFNS \ - { 0, BASE_BAUD, M32R_SIO_OFFSET, M32R_IRQ_SIO0_R, \ - STD_COM_FLAGS }, /* ttyS0 */ -#endif - -#endif /* !CONFIG_PLAT_USRV */ - -static struct old_serial_port old_serial_port[] = { - SERIAL_PORT_DFNS -}; - -#define UART_NR ARRAY_SIZE(old_serial_port) - -struct uart_sio_port { - struct uart_port port; - struct timer_list timer; /* "no irq" timer */ - struct list_head list; /* ports on this IRQ */ - unsigned short rev; - unsigned char acr; - unsigned char ier; - unsigned char lcr; - unsigned char mcr_mask; /* mask of user bits */ - unsigned char mcr_force; /* mask of forced bits */ - unsigned char lsr_break_flag; - - /* - * We provide a per-port pm hook. - */ - void (*pm)(struct uart_port *port, - unsigned int state, unsigned int old); -}; - -struct irq_info { - spinlock_t lock; - struct list_head *head; -}; - -static struct irq_info irq_lists[NR_IRQS]; - -/* - * Here we define the default xmit fifo size used for each type of UART. - */ -static const struct serial_uart_config uart_config[] = { - [PORT_UNKNOWN] = { - .name = "unknown", - .dfl_xmit_fifo_size = 1, - .flags = 0, - }, - [PORT_INDEX(PORT_M32R_SIO)] = { - .name = "M32RSIO", - .dfl_xmit_fifo_size = 1, - .flags = 0, - }, -}; - -#ifdef CONFIG_SERIAL_M32R_PLDSIO - -#define __sio_in(x) inw((unsigned long)(x)) -#define __sio_out(v,x) outw((v),(unsigned long)(x)) - -static inline void sio_set_baud_rate(unsigned long baud) -{ - unsigned short sbaud; - sbaud = (boot_cpu_data.bus_clock / (baud * 4))-1; - __sio_out(sbaud, PLD_ESIO0BAUR); -} - -static void sio_reset(void) -{ - unsigned short tmp; - - tmp = __sio_in(PLD_ESIO0RXB); - tmp = __sio_in(PLD_ESIO0RXB); - tmp = __sio_in(PLD_ESIO0CR); - sio_set_baud_rate(BAUD_RATE); - __sio_out(0x0300, PLD_ESIO0CR); - __sio_out(0x0003, PLD_ESIO0CR); -} - -static void sio_init(void) -{ - unsigned short tmp; - - tmp = __sio_in(PLD_ESIO0RXB); - tmp = __sio_in(PLD_ESIO0RXB); - tmp = __sio_in(PLD_ESIO0CR); - __sio_out(0x0300, PLD_ESIO0CR); - __sio_out(0x0003, PLD_ESIO0CR); -} - -static void sio_error(int *status) -{ - printk("SIO0 error[%04x]\n", *status); - do { - sio_init(); - } while ((*status = __sio_in(PLD_ESIO0CR)) != 3); -} - -#else /* not CONFIG_SERIAL_M32R_PLDSIO */ - -#define __sio_in(x) inl(x) -#define __sio_out(v,x) outl((v),(x)) - -static inline void sio_set_baud_rate(unsigned long baud) -{ - unsigned long i, j; - - i = boot_cpu_data.bus_clock / (baud * 16); - j = (boot_cpu_data.bus_clock - (i * baud * 16)) / baud; - i -= 1; - j = (j + 1) >> 1; - - __sio_out(i, M32R_SIO0_BAUR_PORTL); - __sio_out(j, M32R_SIO0_RBAUR_PORTL); -} - -static void sio_reset(void) -{ - __sio_out(0x00000300, M32R_SIO0_CR_PORTL); /* init status */ - __sio_out(0x00000800, M32R_SIO0_MOD1_PORTL); /* 8bit */ - __sio_out(0x00000080, M32R_SIO0_MOD0_PORTL); /* 1stop non */ - sio_set_baud_rate(BAUD_RATE); - __sio_out(0x00000000, M32R_SIO0_TRCR_PORTL); - __sio_out(0x00000003, M32R_SIO0_CR_PORTL); /* RXCEN */ -} - -static void sio_init(void) -{ - unsigned int tmp; - - tmp = __sio_in(M32R_SIO0_RXB_PORTL); - tmp = __sio_in(M32R_SIO0_RXB_PORTL); - tmp = __sio_in(M32R_SIO0_STS_PORTL); - __sio_out(0x00000003, M32R_SIO0_CR_PORTL); -} - -static void sio_error(int *status) -{ - printk("SIO0 error[%04x]\n", *status); - do { - sio_init(); - } while ((*status = __sio_in(M32R_SIO0_CR_PORTL)) != 3); -} - -#endif /* CONFIG_SERIAL_M32R_PLDSIO */ - -static unsigned int sio_in(struct uart_sio_port *up, int offset) -{ - return __sio_in(up->port.iobase + offset); -} - -static void sio_out(struct uart_sio_port *up, int offset, int value) -{ - __sio_out(value, up->port.iobase + offset); -} - -static unsigned int serial_in(struct uart_sio_port *up, int offset) -{ - if (!offset) - return 0; - - return __sio_in(offset); -} - -static void serial_out(struct uart_sio_port *up, int offset, int value) -{ - if (!offset) - return; - - __sio_out(value, offset); -} - -static void m32r_sio_stop_tx(struct uart_port *port) -{ - struct uart_sio_port *up = (struct uart_sio_port *)port; - - if (up->ier & UART_IER_THRI) { - up->ier &= ~UART_IER_THRI; - serial_out(up, UART_IER, up->ier); - } -} - -static void m32r_sio_start_tx(struct uart_port *port) -{ -#ifdef CONFIG_SERIAL_M32R_PLDSIO - struct uart_sio_port *up = (struct uart_sio_port *)port; - struct circ_buf *xmit = &up->port.state->xmit; - - if (!(up->ier & UART_IER_THRI)) { - up->ier |= UART_IER_THRI; - serial_out(up, UART_IER, up->ier); - serial_out(up, UART_TX, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - up->port.icount.tx++; - } - while((serial_in(up, UART_LSR) & UART_EMPTY) != UART_EMPTY); -#else - struct uart_sio_port *up = (struct uart_sio_port *)port; - - if (!(up->ier & UART_IER_THRI)) { - up->ier |= UART_IER_THRI; - serial_out(up, UART_IER, up->ier); - } -#endif -} - -static void m32r_sio_stop_rx(struct uart_port *port) -{ - struct uart_sio_port *up = (struct uart_sio_port *)port; - - up->ier &= ~UART_IER_RLSI; - up->port.read_status_mask &= ~UART_LSR_DR; - serial_out(up, UART_IER, up->ier); -} - -static void m32r_sio_enable_ms(struct uart_port *port) -{ - struct uart_sio_port *up = (struct uart_sio_port *)port; - - up->ier |= UART_IER_MSI; - serial_out(up, UART_IER, up->ier); -} - -static void receive_chars(struct uart_sio_port *up, int *status) -{ - struct tty_struct *tty = up->port.state->port.tty; - unsigned char ch; - unsigned char flag; - int max_count = 256; - - do { - ch = sio_in(up, SIORXB); - flag = TTY_NORMAL; - up->port.icount.rx++; - - if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE | - UART_LSR_FE | UART_LSR_OE))) { - /* - * For statistics only - */ - if (*status & UART_LSR_BI) { - *status &= ~(UART_LSR_FE | UART_LSR_PE); - up->port.icount.brk++; - /* - * We do the SysRQ and SAK checking - * here because otherwise the break - * may get masked by ignore_status_mask - * or read_status_mask. - */ - if (uart_handle_break(&up->port)) - goto ignore_char; - } else if (*status & UART_LSR_PE) - up->port.icount.parity++; - else if (*status & UART_LSR_FE) - up->port.icount.frame++; - if (*status & UART_LSR_OE) - up->port.icount.overrun++; - - /* - * Mask off conditions which should be ingored. - */ - *status &= up->port.read_status_mask; - - if (up->port.line == up->port.cons->index) { - /* Recover the break flag from console xmit */ - *status |= up->lsr_break_flag; - up->lsr_break_flag = 0; - } - - if (*status & UART_LSR_BI) { - DEBUG_INTR("handling break...."); - flag = TTY_BREAK; - } else if (*status & UART_LSR_PE) - flag = TTY_PARITY; - else if (*status & UART_LSR_FE) - flag = TTY_FRAME; - } - if (uart_handle_sysrq_char(&up->port, ch)) - goto ignore_char; - if ((*status & up->port.ignore_status_mask) == 0) - tty_insert_flip_char(tty, ch, flag); - - if (*status & UART_LSR_OE) { - /* - * Overrun is special, since it's reported - * immediately, and doesn't affect the current - * character. - */ - tty_insert_flip_char(tty, 0, TTY_OVERRUN); - } - ignore_char: - *status = serial_in(up, UART_LSR); - } while ((*status & UART_LSR_DR) && (max_count-- > 0)); - tty_flip_buffer_push(tty); -} - -static void transmit_chars(struct uart_sio_port *up) -{ - struct circ_buf *xmit = &up->port.state->xmit; - int count; - - if (up->port.x_char) { -#ifndef CONFIG_SERIAL_M32R_PLDSIO /* XXX */ - serial_out(up, UART_TX, up->port.x_char); -#endif - up->port.icount.tx++; - up->port.x_char = 0; - return; - } - if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) { - m32r_sio_stop_tx(&up->port); - return; - } - - count = up->port.fifosize; - do { - serial_out(up, UART_TX, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - up->port.icount.tx++; - if (uart_circ_empty(xmit)) - break; - while (!(serial_in(up, UART_LSR) & UART_LSR_THRE)); - - } while (--count > 0); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&up->port); - - DEBUG_INTR("THRE..."); - - if (uart_circ_empty(xmit)) - m32r_sio_stop_tx(&up->port); -} - -/* - * This handles the interrupt from one port. - */ -static inline void m32r_sio_handle_port(struct uart_sio_port *up, - unsigned int status) -{ - DEBUG_INTR("status = %x...", status); - - if (status & 0x04) - receive_chars(up, &status); - if (status & 0x01) - transmit_chars(up); -} - -/* - * This is the serial driver's interrupt routine. - * - * Arjan thinks the old way was overly complex, so it got simplified. - * Alan disagrees, saying that need the complexity to handle the weird - * nature of ISA shared interrupts. (This is a special exception.) - * - * In order to handle ISA shared interrupts properly, we need to check - * that all ports have been serviced, and therefore the ISA interrupt - * line has been de-asserted. - * - * This means we need to loop through all ports. checking that they - * don't have an interrupt pending. - */ -static irqreturn_t m32r_sio_interrupt(int irq, void *dev_id) -{ - struct irq_info *i = dev_id; - struct list_head *l, *end = NULL; - int pass_counter = 0; - - DEBUG_INTR("m32r_sio_interrupt(%d)...", irq); - -#ifdef CONFIG_SERIAL_M32R_PLDSIO -// if (irq == PLD_IRQ_SIO0_SND) -// irq = PLD_IRQ_SIO0_RCV; -#else - if (irq == M32R_IRQ_SIO0_S) - irq = M32R_IRQ_SIO0_R; -#endif - - spin_lock(&i->lock); - - l = i->head; - do { - struct uart_sio_port *up; - unsigned int sts; - - up = list_entry(l, struct uart_sio_port, list); - - sts = sio_in(up, SIOSTS); - if (sts & 0x5) { - spin_lock(&up->port.lock); - m32r_sio_handle_port(up, sts); - spin_unlock(&up->port.lock); - - end = NULL; - } else if (end == NULL) - end = l; - - l = l->next; - - if (l == i->head && pass_counter++ > PASS_LIMIT) { - if (sts & 0xe0) - sio_error(&sts); - break; - } - } while (l != end); - - spin_unlock(&i->lock); - - DEBUG_INTR("end.\n"); - - return IRQ_HANDLED; -} - -/* - * To support ISA shared interrupts, we need to have one interrupt - * handler that ensures that the IRQ line has been deasserted - * before returning. Failing to do this will result in the IRQ - * line being stuck active, and, since ISA irqs are edge triggered, - * no more IRQs will be seen. - */ -static void serial_do_unlink(struct irq_info *i, struct uart_sio_port *up) -{ - spin_lock_irq(&i->lock); - - if (!list_empty(i->head)) { - if (i->head == &up->list) - i->head = i->head->next; - list_del(&up->list); - } else { - BUG_ON(i->head != &up->list); - i->head = NULL; - } - - spin_unlock_irq(&i->lock); -} - -static int serial_link_irq_chain(struct uart_sio_port *up) -{ - struct irq_info *i = irq_lists + up->port.irq; - int ret, irq_flags = 0; - - spin_lock_irq(&i->lock); - - if (i->head) { - list_add(&up->list, i->head); - spin_unlock_irq(&i->lock); - - ret = 0; - } else { - INIT_LIST_HEAD(&up->list); - i->head = &up->list; - spin_unlock_irq(&i->lock); - - ret = request_irq(up->port.irq, m32r_sio_interrupt, - irq_flags, "SIO0-RX", i); - ret |= request_irq(up->port.irq + 1, m32r_sio_interrupt, - irq_flags, "SIO0-TX", i); - if (ret < 0) - serial_do_unlink(i, up); - } - - return ret; -} - -static void serial_unlink_irq_chain(struct uart_sio_port *up) -{ - struct irq_info *i = irq_lists + up->port.irq; - - BUG_ON(i->head == NULL); - - if (list_empty(i->head)) { - free_irq(up->port.irq, i); - free_irq(up->port.irq + 1, i); - } - - serial_do_unlink(i, up); -} - -/* - * This function is used to handle ports that do not have an interrupt. - */ -static void m32r_sio_timeout(unsigned long data) -{ - struct uart_sio_port *up = (struct uart_sio_port *)data; - unsigned int timeout; - unsigned int sts; - - sts = sio_in(up, SIOSTS); - if (sts & 0x5) { - spin_lock(&up->port.lock); - m32r_sio_handle_port(up, sts); - spin_unlock(&up->port.lock); - } - - timeout = up->port.timeout; - timeout = timeout > 6 ? (timeout / 2 - 2) : 1; - mod_timer(&up->timer, jiffies + timeout); -} - -static unsigned int m32r_sio_tx_empty(struct uart_port *port) -{ - struct uart_sio_port *up = (struct uart_sio_port *)port; - unsigned long flags; - unsigned int ret; - - spin_lock_irqsave(&up->port.lock, flags); - ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0; - spin_unlock_irqrestore(&up->port.lock, flags); - - return ret; -} - -static unsigned int m32r_sio_get_mctrl(struct uart_port *port) -{ - return 0; -} - -static void m32r_sio_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - -} - -static void m32r_sio_break_ctl(struct uart_port *port, int break_state) -{ - -} - -static int m32r_sio_startup(struct uart_port *port) -{ - struct uart_sio_port *up = (struct uart_sio_port *)port; - int retval; - - sio_init(); - - /* - * If the "interrupt" for this port doesn't correspond with any - * hardware interrupt, we use a timer-based system. The original - * driver used to do this with IRQ0. - */ - if (!is_real_interrupt(up->port.irq)) { - unsigned int timeout = up->port.timeout; - - timeout = timeout > 6 ? (timeout / 2 - 2) : 1; - - up->timer.data = (unsigned long)up; - mod_timer(&up->timer, jiffies + timeout); - } else { - retval = serial_link_irq_chain(up); - if (retval) - return retval; - } - - /* - * Finally, enable interrupts. Note: Modem status interrupts - * are set via set_termios(), which will be occurring imminently - * anyway, so we don't enable them here. - * - M32R_SIO: 0x0c - * - M32R_PLDSIO: 0x04 - */ - up->ier = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI; - sio_out(up, SIOTRCR, up->ier); - - /* - * And clear the interrupt registers again for luck. - */ - sio_reset(); - - return 0; -} - -static void m32r_sio_shutdown(struct uart_port *port) -{ - struct uart_sio_port *up = (struct uart_sio_port *)port; - - /* - * Disable interrupts from this port - */ - up->ier = 0; - sio_out(up, SIOTRCR, 0); - - /* - * Disable break condition and FIFOs - */ - - sio_init(); - - if (!is_real_interrupt(up->port.irq)) - del_timer_sync(&up->timer); - else - serial_unlink_irq_chain(up); -} - -static unsigned int m32r_sio_get_divisor(struct uart_port *port, - unsigned int baud) -{ - return uart_get_divisor(port, baud); -} - -static void m32r_sio_set_termios(struct uart_port *port, - struct ktermios *termios, struct ktermios *old) -{ - struct uart_sio_port *up = (struct uart_sio_port *)port; - unsigned char cval = 0; - unsigned long flags; - unsigned int baud, quot; - - switch (termios->c_cflag & CSIZE) { - case CS5: - cval = UART_LCR_WLEN5; - break; - case CS6: - cval = UART_LCR_WLEN6; - break; - case CS7: - cval = UART_LCR_WLEN7; - break; - default: - case CS8: - cval = UART_LCR_WLEN8; - break; - } - - if (termios->c_cflag & CSTOPB) - cval |= UART_LCR_STOP; - if (termios->c_cflag & PARENB) - cval |= UART_LCR_PARITY; - if (!(termios->c_cflag & PARODD)) - cval |= UART_LCR_EPAR; -#ifdef CMSPAR - if (termios->c_cflag & CMSPAR) - cval |= UART_LCR_SPAR; -#endif - - /* - * Ask the core to calculate the divisor for us. - */ -#ifdef CONFIG_SERIAL_M32R_PLDSIO - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/4); -#else - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); -#endif - quot = m32r_sio_get_divisor(port, baud); - - /* - * Ok, we're now changing the port state. Do it with - * interrupts disabled. - */ - spin_lock_irqsave(&up->port.lock, flags); - - sio_set_baud_rate(baud); - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; - if (termios->c_iflag & INPCK) - up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; - if (termios->c_iflag & (BRKINT | PARMRK)) - up->port.read_status_mask |= UART_LSR_BI; - - /* - * Characteres to ignore - */ - up->port.ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; - if (termios->c_iflag & IGNBRK) { - up->port.ignore_status_mask |= UART_LSR_BI; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - up->port.ignore_status_mask |= UART_LSR_OE; - } - - /* - * ignore all characters if CREAD is not set - */ - if ((termios->c_cflag & CREAD) == 0) - up->port.ignore_status_mask |= UART_LSR_DR; - - /* - * CTS flow control flag and modem status interrupts - */ - up->ier &= ~UART_IER_MSI; - if (UART_ENABLE_MS(&up->port, termios->c_cflag)) - up->ier |= UART_IER_MSI; - - serial_out(up, UART_IER, up->ier); - - up->lcr = cval; /* Save LCR */ - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static void m32r_sio_pm(struct uart_port *port, unsigned int state, - unsigned int oldstate) -{ - struct uart_sio_port *up = (struct uart_sio_port *)port; - - if (up->pm) - up->pm(port, state, oldstate); -} - -/* - * Resource handling. This is complicated by the fact that resources - * depend on the port type. Maybe we should be claiming the standard - * 8250 ports, and then trying to get other resources as necessary? - */ -static int -m32r_sio_request_std_resource(struct uart_sio_port *up, struct resource **res) -{ - unsigned int size = 8 << up->port.regshift; -#ifndef CONFIG_SERIAL_M32R_PLDSIO - unsigned long start; -#endif - int ret = 0; - - switch (up->port.iotype) { - case UPIO_MEM: - if (up->port.mapbase) { -#ifdef CONFIG_SERIAL_M32R_PLDSIO - *res = request_mem_region(up->port.mapbase, size, "serial"); -#else - start = up->port.mapbase; - *res = request_mem_region(start, size, "serial"); -#endif - if (!*res) - ret = -EBUSY; - } - break; - - case UPIO_PORT: - *res = request_region(up->port.iobase, size, "serial"); - if (!*res) - ret = -EBUSY; - break; - } - return ret; -} - -static void m32r_sio_release_port(struct uart_port *port) -{ - struct uart_sio_port *up = (struct uart_sio_port *)port; - unsigned long start, offset = 0, size = 0; - - size <<= up->port.regshift; - - switch (up->port.iotype) { - case UPIO_MEM: - if (up->port.mapbase) { - /* - * Unmap the area. - */ - iounmap(up->port.membase); - up->port.membase = NULL; - - start = up->port.mapbase; - - if (size) - release_mem_region(start + offset, size); - release_mem_region(start, 8 << up->port.regshift); - } - break; - - case UPIO_PORT: - start = up->port.iobase; - - if (size) - release_region(start + offset, size); - release_region(start + offset, 8 << up->port.regshift); - break; - - default: - break; - } -} - -static int m32r_sio_request_port(struct uart_port *port) -{ - struct uart_sio_port *up = (struct uart_sio_port *)port; - struct resource *res = NULL; - int ret = 0; - - ret = m32r_sio_request_std_resource(up, &res); - - /* - * If we have a mapbase, then request that as well. - */ - if (ret == 0 && up->port.flags & UPF_IOREMAP) { - int size = res->end - res->start + 1; - - up->port.membase = ioremap(up->port.mapbase, size); - if (!up->port.membase) - ret = -ENOMEM; - } - - if (ret < 0) { - if (res) - release_resource(res); - } - - return ret; -} - -static void m32r_sio_config_port(struct uart_port *port, int flags) -{ - struct uart_sio_port *up = (struct uart_sio_port *)port; - - spin_lock_irqsave(&up->port.lock, flags); - - up->port.type = (PORT_M32R_SIO - PORT_M32R_BASE + 1); - up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size; - - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static int -m32r_sio_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - if (ser->irq >= nr_irqs || ser->irq < 0 || - ser->baud_base < 9600 || ser->type < PORT_UNKNOWN || - ser->type >= ARRAY_SIZE(uart_config)) - return -EINVAL; - return 0; -} - -static const char * -m32r_sio_type(struct uart_port *port) -{ - int type = port->type; - - if (type >= ARRAY_SIZE(uart_config)) - type = 0; - return uart_config[type].name; -} - -static struct uart_ops m32r_sio_pops = { - .tx_empty = m32r_sio_tx_empty, - .set_mctrl = m32r_sio_set_mctrl, - .get_mctrl = m32r_sio_get_mctrl, - .stop_tx = m32r_sio_stop_tx, - .start_tx = m32r_sio_start_tx, - .stop_rx = m32r_sio_stop_rx, - .enable_ms = m32r_sio_enable_ms, - .break_ctl = m32r_sio_break_ctl, - .startup = m32r_sio_startup, - .shutdown = m32r_sio_shutdown, - .set_termios = m32r_sio_set_termios, - .pm = m32r_sio_pm, - .type = m32r_sio_type, - .release_port = m32r_sio_release_port, - .request_port = m32r_sio_request_port, - .config_port = m32r_sio_config_port, - .verify_port = m32r_sio_verify_port, -}; - -static struct uart_sio_port m32r_sio_ports[UART_NR]; - -static void __init m32r_sio_init_ports(void) -{ - struct uart_sio_port *up; - static int first = 1; - int i; - - if (!first) - return; - first = 0; - - for (i = 0, up = m32r_sio_ports; i < ARRAY_SIZE(old_serial_port); - i++, up++) { - up->port.iobase = old_serial_port[i].port; - up->port.irq = irq_canonicalize(old_serial_port[i].irq); - up->port.uartclk = old_serial_port[i].baud_base * 16; - up->port.flags = old_serial_port[i].flags; - up->port.membase = old_serial_port[i].iomem_base; - up->port.iotype = old_serial_port[i].io_type; - up->port.regshift = old_serial_port[i].iomem_reg_shift; - up->port.ops = &m32r_sio_pops; - } -} - -static void __init m32r_sio_register_ports(struct uart_driver *drv) -{ - int i; - - m32r_sio_init_ports(); - - for (i = 0; i < UART_NR; i++) { - struct uart_sio_port *up = &m32r_sio_ports[i]; - - up->port.line = i; - up->port.ops = &m32r_sio_pops; - init_timer(&up->timer); - up->timer.function = m32r_sio_timeout; - - /* - * ALPHA_KLUDGE_MCR needs to be killed. - */ - up->mcr_mask = ~ALPHA_KLUDGE_MCR; - up->mcr_force = ALPHA_KLUDGE_MCR; - - uart_add_one_port(drv, &up->port); - } -} - -#ifdef CONFIG_SERIAL_M32R_SIO_CONSOLE - -/* - * Wait for transmitter & holding register to empty - */ -static inline void wait_for_xmitr(struct uart_sio_port *up) -{ - unsigned int status, tmout = 10000; - - /* Wait up to 10ms for the character(s) to be sent. */ - do { - status = sio_in(up, SIOSTS); - - if (--tmout == 0) - break; - udelay(1); - } while ((status & UART_EMPTY) != UART_EMPTY); - - /* Wait up to 1s for flow control if necessary */ - if (up->port.flags & UPF_CONS_FLOW) { - tmout = 1000000; - while (--tmout) - udelay(1); - } -} - -static void m32r_sio_console_putchar(struct uart_port *port, int ch) -{ - struct uart_sio_port *up = (struct uart_sio_port *)port; - - wait_for_xmitr(up); - sio_out(up, SIOTXB, ch); -} - -/* - * Print a string to the serial port trying not to disturb - * any possible real use of the port... - * - * The console_lock must be held when we get here. - */ -static void m32r_sio_console_write(struct console *co, const char *s, - unsigned int count) -{ - struct uart_sio_port *up = &m32r_sio_ports[co->index]; - unsigned int ier; - - /* - * First save the UER then disable the interrupts - */ - ier = sio_in(up, SIOTRCR); - sio_out(up, SIOTRCR, 0); - - uart_console_write(&up->port, s, count, m32r_sio_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore the IER - */ - wait_for_xmitr(up); - sio_out(up, SIOTRCR, ier); -} - -static int __init m32r_sio_console_setup(struct console *co, char *options) -{ - struct uart_port *port; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - if (co->index >= UART_NR) - co->index = 0; - port = &m32r_sio_ports[co->index].port; - - /* - * Temporary fix. - */ - spin_lock_init(&port->lock); - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - -static struct uart_driver m32r_sio_reg; -static struct console m32r_sio_console = { - .name = "ttyS", - .write = m32r_sio_console_write, - .device = uart_console_device, - .setup = m32r_sio_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &m32r_sio_reg, -}; - -static int __init m32r_sio_console_init(void) -{ - sio_reset(); - sio_init(); - m32r_sio_init_ports(); - register_console(&m32r_sio_console); - return 0; -} -console_initcall(m32r_sio_console_init); - -#define M32R_SIO_CONSOLE &m32r_sio_console -#else -#define M32R_SIO_CONSOLE NULL -#endif - -static struct uart_driver m32r_sio_reg = { - .owner = THIS_MODULE, - .driver_name = "sio", - .dev_name = "ttyS", - .major = TTY_MAJOR, - .minor = 64, - .nr = UART_NR, - .cons = M32R_SIO_CONSOLE, -}; - -/** - * m32r_sio_suspend_port - suspend one serial port - * @line: serial line number - * - * Suspend one serial port. - */ -void m32r_sio_suspend_port(int line) -{ - uart_suspend_port(&m32r_sio_reg, &m32r_sio_ports[line].port); -} - -/** - * m32r_sio_resume_port - resume one serial port - * @line: serial line number - * - * Resume one serial port. - */ -void m32r_sio_resume_port(int line) -{ - uart_resume_port(&m32r_sio_reg, &m32r_sio_ports[line].port); -} - -static int __init m32r_sio_init(void) -{ - int ret, i; - - printk(KERN_INFO "Serial: M32R SIO driver\n"); - - for (i = 0; i < nr_irqs; i++) - spin_lock_init(&irq_lists[i].lock); - - ret = uart_register_driver(&m32r_sio_reg); - if (ret >= 0) - m32r_sio_register_ports(&m32r_sio_reg); - - return ret; -} - -static void __exit m32r_sio_exit(void) -{ - int i; - - for (i = 0; i < UART_NR; i++) - uart_remove_one_port(&m32r_sio_reg, &m32r_sio_ports[i].port); - - uart_unregister_driver(&m32r_sio_reg); -} - -module_init(m32r_sio_init); -module_exit(m32r_sio_exit); - -EXPORT_SYMBOL(m32r_sio_suspend_port); -EXPORT_SYMBOL(m32r_sio_resume_port); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Generic M32R SIO serial driver"); diff --git a/drivers/serial/m32r_sio.h b/drivers/serial/m32r_sio.h deleted file mode 100644 index e9b7e11793b1..000000000000 --- a/drivers/serial/m32r_sio.h +++ /dev/null @@ -1,48 +0,0 @@ -/* - * m32r_sio.h - * - * Driver for M32R serial ports - * - * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. - * Based on drivers/serial/8250.h. - * - * Copyright (C) 2001 Russell King. - * Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - - -struct m32r_sio_probe { - struct module *owner; - int (*pci_init_one)(struct pci_dev *dev); - void (*pci_remove_one)(struct pci_dev *dev); - void (*pnp_init)(void); -}; - -int m32r_sio_register_probe(struct m32r_sio_probe *probe); -void m32r_sio_unregister_probe(struct m32r_sio_probe *probe); -void m32r_sio_get_irq_map(unsigned int *map); -void m32r_sio_suspend_port(int line); -void m32r_sio_resume_port(int line); - -struct old_serial_port { - unsigned int uart; - unsigned int baud_base; - unsigned int port; - unsigned int irq; - unsigned int flags; - unsigned char io_type; - unsigned char __iomem *iomem_base; - unsigned short iomem_reg_shift; -}; - -#define _INLINE_ inline - -#define PROBE_RSA (1 << 0) -#define PROBE_ANY (~0) - -#define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8) diff --git a/drivers/serial/m32r_sio_reg.h b/drivers/serial/m32r_sio_reg.h deleted file mode 100644 index 4671473793e3..000000000000 --- a/drivers/serial/m32r_sio_reg.h +++ /dev/null @@ -1,152 +0,0 @@ -/* - * m32r_sio_reg.h - * - * Copyright (C) 1992, 1994 by Theodore Ts'o. - * Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org> - * - * Redistribution of this file is permitted under the terms of the GNU - * Public License (GPL) - * - * These are the UART port assignments, expressed as offsets from the base - * register. These assignments should hold for any serial port based on - * a 8250, 16450, or 16550(A). - */ - -#ifndef _M32R_SIO_REG_H -#define _M32R_SIO_REG_H - - -#ifdef CONFIG_SERIAL_M32R_PLDSIO - -#define SIOCR 0x000 -#define SIOMOD0 0x002 -#define SIOMOD1 0x004 -#define SIOSTS 0x006 -#define SIOTRCR 0x008 -#define SIOBAUR 0x00a -// #define SIORBAUR 0x018 -#define SIOTXB 0x00c -#define SIORXB 0x00e - -#define UART_RX ((unsigned long) PLD_ESIO0RXB) - /* In: Receive buffer (DLAB=0) */ -#define UART_TX ((unsigned long) PLD_ESIO0TXB) - /* Out: Transmit buffer (DLAB=0) */ -#define UART_DLL 0 /* Out: Divisor Latch Low (DLAB=1) */ -#define UART_TRG 0 /* (LCR=BF) FCTR bit 7 selects Rx or Tx - * In: Fifo count - * Out: Fifo custom trigger levels - * XR16C85x only */ - -#define UART_DLM 0 /* Out: Divisor Latch High (DLAB=1) */ -#define UART_IER ((unsigned long) PLD_ESIO0INTCR) - /* Out: Interrupt Enable Register */ -#define UART_FCTR 0 /* (LCR=BF) Feature Control Register - * XR16C85x only */ - -#define UART_IIR 0 /* In: Interrupt ID Register */ -#define UART_FCR 0 /* Out: FIFO Control Register */ -#define UART_EFR 0 /* I/O: Extended Features Register */ - /* (DLAB=1, 16C660 only) */ - -#define UART_LCR 0 /* Out: Line Control Register */ -#define UART_MCR 0 /* Out: Modem Control Register */ -#define UART_LSR ((unsigned long) PLD_ESIO0STS) - /* In: Line Status Register */ -#define UART_MSR 0 /* In: Modem Status Register */ -#define UART_SCR 0 /* I/O: Scratch Register */ -#define UART_EMSR 0 /* (LCR=BF) Extended Mode Select Register - * FCTR bit 6 selects SCR or EMSR - * XR16c85x only */ - -#else /* not CONFIG_SERIAL_M32R_PLDSIO */ - -#define SIOCR 0x000 -#define SIOMOD0 0x004 -#define SIOMOD1 0x008 -#define SIOSTS 0x00c -#define SIOTRCR 0x010 -#define SIOBAUR 0x014 -#define SIORBAUR 0x018 -#define SIOTXB 0x01c -#define SIORXB 0x020 - -#define UART_RX M32R_SIO0_RXB_PORTL /* In: Receive buffer (DLAB=0) */ -#define UART_TX M32R_SIO0_TXB_PORTL /* Out: Transmit buffer (DLAB=0) */ -#define UART_DLL 0 /* Out: Divisor Latch Low (DLAB=1) */ -#define UART_TRG 0 /* (LCR=BF) FCTR bit 7 selects Rx or Tx - * In: Fifo count - * Out: Fifo custom trigger levels - * XR16C85x only */ - -#define UART_DLM 0 /* Out: Divisor Latch High (DLAB=1) */ -#define UART_IER M32R_SIO0_TRCR_PORTL /* Out: Interrupt Enable Register */ -#define UART_FCTR 0 /* (LCR=BF) Feature Control Register - * XR16C85x only */ - -#define UART_IIR 0 /* In: Interrupt ID Register */ -#define UART_FCR 0 /* Out: FIFO Control Register */ -#define UART_EFR 0 /* I/O: Extended Features Register */ - /* (DLAB=1, 16C660 only) */ - -#define UART_LCR 0 /* Out: Line Control Register */ -#define UART_MCR 0 /* Out: Modem Control Register */ -#define UART_LSR M32R_SIO0_STS_PORTL /* In: Line Status Register */ -#define UART_MSR 0 /* In: Modem Status Register */ -#define UART_SCR 0 /* I/O: Scratch Register */ -#define UART_EMSR 0 /* (LCR=BF) Extended Mode Select Register - * FCTR bit 6 selects SCR or EMSR - * XR16c85x only */ - -#endif /* CONFIG_SERIAL_M32R_PLDSIO */ - -#define UART_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - -/* - * These are the definitions for the Line Control Register - * - * Note: if the word length is 5 bits (UART_LCR_WLEN5), then setting - * UART_LCR_STOP will select 1.5 stop bits, not 2 stop bits. - */ -#define UART_LCR_DLAB 0x80 /* Divisor latch access bit */ -#define UART_LCR_SBC 0x40 /* Set break control */ -#define UART_LCR_SPAR 0x20 /* Stick parity (?) */ -#define UART_LCR_EPAR 0x10 /* Even parity select */ -#define UART_LCR_PARITY 0x08 /* Parity Enable */ -#define UART_LCR_STOP 0x04 /* Stop bits: 0=1 stop bit, 1= 2 stop bits */ -#define UART_LCR_WLEN5 0x00 /* Wordlength: 5 bits */ -#define UART_LCR_WLEN6 0x01 /* Wordlength: 6 bits */ -#define UART_LCR_WLEN7 0x02 /* Wordlength: 7 bits */ -#define UART_LCR_WLEN8 0x03 /* Wordlength: 8 bits */ - -/* - * These are the definitions for the Line Status Register - */ -#define UART_LSR_TEMT 0x02 /* Transmitter empty */ -#define UART_LSR_THRE 0x01 /* Transmit-hold-register empty */ -#define UART_LSR_BI 0x00 /* Break interrupt indicator */ -#define UART_LSR_FE 0x80 /* Frame error indicator */ -#define UART_LSR_PE 0x40 /* Parity error indicator */ -#define UART_LSR_OE 0x20 /* Overrun error indicator */ -#define UART_LSR_DR 0x04 /* Receiver data ready */ - -/* - * These are the definitions for the Interrupt Identification Register - */ -#define UART_IIR_NO_INT 0x01 /* No interrupts pending */ -#define UART_IIR_ID 0x06 /* Mask for the interrupt ID */ - -#define UART_IIR_MSI 0x00 /* Modem status interrupt */ -#define UART_IIR_THRI 0x02 /* Transmitter holding register empty */ -#define UART_IIR_RDI 0x04 /* Receiver data interrupt */ -#define UART_IIR_RLSI 0x06 /* Receiver line status interrupt */ - -/* - * These are the definitions for the Interrupt Enable Register - */ -#define UART_IER_MSI 0x00 /* Enable Modem status interrupt */ -#define UART_IER_RLSI 0x08 /* Enable receiver line status interrupt */ -#define UART_IER_THRI 0x03 /* Enable Transmitter holding register int. */ -#define UART_IER_RDI 0x04 /* Enable receiver data interrupt */ - -#endif /* _M32R_SIO_REG_H */ diff --git a/drivers/serial/max3100.c b/drivers/serial/max3100.c deleted file mode 100644 index beb1afa27d8d..000000000000 --- a/drivers/serial/max3100.c +++ /dev/null @@ -1,926 +0,0 @@ -/* - * - * Copyright (C) 2008 Christian Pellegrin <chripell@evolware.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * - * Notes: the MAX3100 doesn't provide an interrupt on CTS so we have - * to use polling for flow control. TX empty IRQ is unusable, since - * writing conf clears FIFO buffer and we cannot have this interrupt - * always asking us for attention. - * - * Example platform data: - - static struct plat_max3100 max3100_plat_data = { - .loopback = 0, - .crystal = 0, - .poll_time = 100, - }; - - static struct spi_board_info spi_board_info[] = { - { - .modalias = "max3100", - .platform_data = &max3100_plat_data, - .irq = IRQ_EINT12, - .max_speed_hz = 5*1000*1000, - .chip_select = 0, - }, - }; - - * The initial minor number is 209 in the low-density serial port: - * mknod /dev/ttyMAX0 c 204 209 - */ - -#define MAX3100_MAJOR 204 -#define MAX3100_MINOR 209 -/* 4 MAX3100s should be enough for everyone */ -#define MAX_MAX3100 4 - -#include <linux/delay.h> -#include <linux/slab.h> -#include <linux/device.h> -#include <linux/serial_core.h> -#include <linux/serial.h> -#include <linux/spi/spi.h> -#include <linux/freezer.h> - -#include <linux/serial_max3100.h> - -#define MAX3100_C (1<<14) -#define MAX3100_D (0<<14) -#define MAX3100_W (1<<15) -#define MAX3100_RX (0<<15) - -#define MAX3100_WC (MAX3100_W | MAX3100_C) -#define MAX3100_RC (MAX3100_RX | MAX3100_C) -#define MAX3100_WD (MAX3100_W | MAX3100_D) -#define MAX3100_RD (MAX3100_RX | MAX3100_D) -#define MAX3100_CMD (3 << 14) - -#define MAX3100_T (1<<14) -#define MAX3100_R (1<<15) - -#define MAX3100_FEN (1<<13) -#define MAX3100_SHDN (1<<12) -#define MAX3100_TM (1<<11) -#define MAX3100_RM (1<<10) -#define MAX3100_PM (1<<9) -#define MAX3100_RAM (1<<8) -#define MAX3100_IR (1<<7) -#define MAX3100_ST (1<<6) -#define MAX3100_PE (1<<5) -#define MAX3100_L (1<<4) -#define MAX3100_BAUD (0xf) - -#define MAX3100_TE (1<<10) -#define MAX3100_RAFE (1<<10) -#define MAX3100_RTS (1<<9) -#define MAX3100_CTS (1<<9) -#define MAX3100_PT (1<<8) -#define MAX3100_DATA (0xff) - -#define MAX3100_RT (MAX3100_R | MAX3100_T) -#define MAX3100_RTC (MAX3100_RT | MAX3100_CTS | MAX3100_RAFE) - -/* the following simulate a status reg for ignore_status_mask */ -#define MAX3100_STATUS_PE 1 -#define MAX3100_STATUS_FE 2 -#define MAX3100_STATUS_OE 4 - -struct max3100_port { - struct uart_port port; - struct spi_device *spi; - - int cts; /* last CTS received for flow ctrl */ - int tx_empty; /* last TX empty bit */ - - spinlock_t conf_lock; /* shared data */ - int conf_commit; /* need to make changes */ - int conf; /* configuration for the MAX31000 - * (bits 0-7, bits 8-11 are irqs) */ - int rts_commit; /* need to change rts */ - int rts; /* rts status */ - int baud; /* current baud rate */ - - int parity; /* keeps track if we should send parity */ -#define MAX3100_PARITY_ON 1 -#define MAX3100_PARITY_ODD 2 -#define MAX3100_7BIT 4 - int rx_enabled; /* if we should rx chars */ - - int irq; /* irq assigned to the max3100 */ - - int minor; /* minor number */ - int crystal; /* 1 if 3.6864Mhz crystal 0 for 1.8432 */ - int loopback; /* 1 if we are in loopback mode */ - - /* for handling irqs: need workqueue since we do spi_sync */ - struct workqueue_struct *workqueue; - struct work_struct work; - /* set to 1 to make the workhandler exit as soon as possible */ - int force_end_work; - /* need to know we are suspending to avoid deadlock on workqueue */ - int suspending; - - /* hook for suspending MAX3100 via dedicated pin */ - void (*max3100_hw_suspend) (int suspend); - - /* poll time (in ms) for ctrl lines */ - int poll_time; - /* and its timer */ - struct timer_list timer; -}; - -static struct max3100_port *max3100s[MAX_MAX3100]; /* the chips */ -static DEFINE_MUTEX(max3100s_lock); /* race on probe */ - -static int max3100_do_parity(struct max3100_port *s, u16 c) -{ - int parity; - - if (s->parity & MAX3100_PARITY_ODD) - parity = 1; - else - parity = 0; - - if (s->parity & MAX3100_7BIT) - c &= 0x7f; - else - c &= 0xff; - - parity = parity ^ (hweight8(c) & 1); - return parity; -} - -static int max3100_check_parity(struct max3100_port *s, u16 c) -{ - return max3100_do_parity(s, c) == ((c >> 8) & 1); -} - -static void max3100_calc_parity(struct max3100_port *s, u16 *c) -{ - if (s->parity & MAX3100_7BIT) - *c &= 0x7f; - else - *c &= 0xff; - - if (s->parity & MAX3100_PARITY_ON) - *c |= max3100_do_parity(s, *c) << 8; -} - -static void max3100_work(struct work_struct *w); - -static void max3100_dowork(struct max3100_port *s) -{ - if (!s->force_end_work && !work_pending(&s->work) && - !freezing(current) && !s->suspending) - queue_work(s->workqueue, &s->work); -} - -static void max3100_timeout(unsigned long data) -{ - struct max3100_port *s = (struct max3100_port *)data; - - if (s->port.state) { - max3100_dowork(s); - mod_timer(&s->timer, jiffies + s->poll_time); - } -} - -static int max3100_sr(struct max3100_port *s, u16 tx, u16 *rx) -{ - struct spi_message message; - u16 etx, erx; - int status; - struct spi_transfer tran = { - .tx_buf = &etx, - .rx_buf = &erx, - .len = 2, - }; - - etx = cpu_to_be16(tx); - spi_message_init(&message); - spi_message_add_tail(&tran, &message); - status = spi_sync(s->spi, &message); - if (status) { - dev_warn(&s->spi->dev, "error while calling spi_sync\n"); - return -EIO; - } - *rx = be16_to_cpu(erx); - s->tx_empty = (*rx & MAX3100_T) > 0; - dev_dbg(&s->spi->dev, "%04x - %04x\n", tx, *rx); - return 0; -} - -static int max3100_handlerx(struct max3100_port *s, u16 rx) -{ - unsigned int ch, flg, status = 0; - int ret = 0, cts; - - if (rx & MAX3100_R && s->rx_enabled) { - dev_dbg(&s->spi->dev, "%s\n", __func__); - ch = rx & (s->parity & MAX3100_7BIT ? 0x7f : 0xff); - if (rx & MAX3100_RAFE) { - s->port.icount.frame++; - flg = TTY_FRAME; - status |= MAX3100_STATUS_FE; - } else { - if (s->parity & MAX3100_PARITY_ON) { - if (max3100_check_parity(s, rx)) { - s->port.icount.rx++; - flg = TTY_NORMAL; - } else { - s->port.icount.parity++; - flg = TTY_PARITY; - status |= MAX3100_STATUS_PE; - } - } else { - s->port.icount.rx++; - flg = TTY_NORMAL; - } - } - uart_insert_char(&s->port, status, MAX3100_STATUS_OE, ch, flg); - ret = 1; - } - - cts = (rx & MAX3100_CTS) > 0; - if (s->cts != cts) { - s->cts = cts; - uart_handle_cts_change(&s->port, cts ? TIOCM_CTS : 0); - } - - return ret; -} - -static void max3100_work(struct work_struct *w) -{ - struct max3100_port *s = container_of(w, struct max3100_port, work); - int rxchars; - u16 tx, rx; - int conf, cconf, rts, crts; - struct circ_buf *xmit = &s->port.state->xmit; - - dev_dbg(&s->spi->dev, "%s\n", __func__); - - rxchars = 0; - do { - spin_lock(&s->conf_lock); - conf = s->conf; - cconf = s->conf_commit; - s->conf_commit = 0; - rts = s->rts; - crts = s->rts_commit; - s->rts_commit = 0; - spin_unlock(&s->conf_lock); - if (cconf) - max3100_sr(s, MAX3100_WC | conf, &rx); - if (crts) { - max3100_sr(s, MAX3100_WD | MAX3100_TE | - (s->rts ? MAX3100_RTS : 0), &rx); - rxchars += max3100_handlerx(s, rx); - } - - max3100_sr(s, MAX3100_RD, &rx); - rxchars += max3100_handlerx(s, rx); - - if (rx & MAX3100_T) { - tx = 0xffff; - if (s->port.x_char) { - tx = s->port.x_char; - s->port.icount.tx++; - s->port.x_char = 0; - } else if (!uart_circ_empty(xmit) && - !uart_tx_stopped(&s->port)) { - tx = xmit->buf[xmit->tail]; - xmit->tail = (xmit->tail + 1) & - (UART_XMIT_SIZE - 1); - s->port.icount.tx++; - } - if (tx != 0xffff) { - max3100_calc_parity(s, &tx); - tx |= MAX3100_WD | (s->rts ? MAX3100_RTS : 0); - max3100_sr(s, tx, &rx); - rxchars += max3100_handlerx(s, rx); - } - } - - if (rxchars > 16 && s->port.state->port.tty != NULL) { - tty_flip_buffer_push(s->port.state->port.tty); - rxchars = 0; - } - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&s->port); - - } while (!s->force_end_work && - !freezing(current) && - ((rx & MAX3100_R) || - (!uart_circ_empty(xmit) && - !uart_tx_stopped(&s->port)))); - - if (rxchars > 0 && s->port.state->port.tty != NULL) - tty_flip_buffer_push(s->port.state->port.tty); -} - -static irqreturn_t max3100_irq(int irqno, void *dev_id) -{ - struct max3100_port *s = dev_id; - - dev_dbg(&s->spi->dev, "%s\n", __func__); - - max3100_dowork(s); - return IRQ_HANDLED; -} - -static void max3100_enable_ms(struct uart_port *port) -{ - struct max3100_port *s = container_of(port, - struct max3100_port, - port); - - if (s->poll_time > 0) - mod_timer(&s->timer, jiffies); - dev_dbg(&s->spi->dev, "%s\n", __func__); -} - -static void max3100_start_tx(struct uart_port *port) -{ - struct max3100_port *s = container_of(port, - struct max3100_port, - port); - - dev_dbg(&s->spi->dev, "%s\n", __func__); - - max3100_dowork(s); -} - -static void max3100_stop_rx(struct uart_port *port) -{ - struct max3100_port *s = container_of(port, - struct max3100_port, - port); - - dev_dbg(&s->spi->dev, "%s\n", __func__); - - s->rx_enabled = 0; - spin_lock(&s->conf_lock); - s->conf &= ~MAX3100_RM; - s->conf_commit = 1; - spin_unlock(&s->conf_lock); - max3100_dowork(s); -} - -static unsigned int max3100_tx_empty(struct uart_port *port) -{ - struct max3100_port *s = container_of(port, - struct max3100_port, - port); - - dev_dbg(&s->spi->dev, "%s\n", __func__); - - /* may not be truly up-to-date */ - max3100_dowork(s); - return s->tx_empty; -} - -static unsigned int max3100_get_mctrl(struct uart_port *port) -{ - struct max3100_port *s = container_of(port, - struct max3100_port, - port); - - dev_dbg(&s->spi->dev, "%s\n", __func__); - - /* may not be truly up-to-date */ - max3100_dowork(s); - /* always assert DCD and DSR since these lines are not wired */ - return (s->cts ? TIOCM_CTS : 0) | TIOCM_DSR | TIOCM_CAR; -} - -static void max3100_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct max3100_port *s = container_of(port, - struct max3100_port, - port); - int rts; - - dev_dbg(&s->spi->dev, "%s\n", __func__); - - rts = (mctrl & TIOCM_RTS) > 0; - - spin_lock(&s->conf_lock); - if (s->rts != rts) { - s->rts = rts; - s->rts_commit = 1; - max3100_dowork(s); - } - spin_unlock(&s->conf_lock); -} - -static void -max3100_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct max3100_port *s = container_of(port, - struct max3100_port, - port); - int baud = 0; - unsigned cflag; - u32 param_new, param_mask, parity = 0; - - dev_dbg(&s->spi->dev, "%s\n", __func__); - - cflag = termios->c_cflag; - param_new = 0; - param_mask = 0; - - baud = tty_termios_baud_rate(termios); - param_new = s->conf & MAX3100_BAUD; - switch (baud) { - case 300: - if (s->crystal) - baud = s->baud; - else - param_new = 15; - break; - case 600: - param_new = 14 + s->crystal; - break; - case 1200: - param_new = 13 + s->crystal; - break; - case 2400: - param_new = 12 + s->crystal; - break; - case 4800: - param_new = 11 + s->crystal; - break; - case 9600: - param_new = 10 + s->crystal; - break; - case 19200: - param_new = 9 + s->crystal; - break; - case 38400: - param_new = 8 + s->crystal; - break; - case 57600: - param_new = 1 + s->crystal; - break; - case 115200: - param_new = 0 + s->crystal; - break; - case 230400: - if (s->crystal) - param_new = 0; - else - baud = s->baud; - break; - default: - baud = s->baud; - } - tty_termios_encode_baud_rate(termios, baud, baud); - s->baud = baud; - param_mask |= MAX3100_BAUD; - - if ((cflag & CSIZE) == CS8) { - param_new &= ~MAX3100_L; - parity &= ~MAX3100_7BIT; - } else { - param_new |= MAX3100_L; - parity |= MAX3100_7BIT; - cflag = (cflag & ~CSIZE) | CS7; - } - param_mask |= MAX3100_L; - - if (cflag & CSTOPB) - param_new |= MAX3100_ST; - else - param_new &= ~MAX3100_ST; - param_mask |= MAX3100_ST; - - if (cflag & PARENB) { - param_new |= MAX3100_PE; - parity |= MAX3100_PARITY_ON; - } else { - param_new &= ~MAX3100_PE; - parity &= ~MAX3100_PARITY_ON; - } - param_mask |= MAX3100_PE; - - if (cflag & PARODD) - parity |= MAX3100_PARITY_ODD; - else - parity &= ~MAX3100_PARITY_ODD; - - /* mask termios capabilities we don't support */ - cflag &= ~CMSPAR; - termios->c_cflag = cflag; - - s->port.ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - s->port.ignore_status_mask |= - MAX3100_STATUS_PE | MAX3100_STATUS_FE | - MAX3100_STATUS_OE; - - /* we are sending char from a workqueue so enable */ - s->port.state->port.tty->low_latency = 1; - - if (s->poll_time > 0) - del_timer_sync(&s->timer); - - uart_update_timeout(port, termios->c_cflag, baud); - - spin_lock(&s->conf_lock); - s->conf = (s->conf & ~param_mask) | (param_new & param_mask); - s->conf_commit = 1; - s->parity = parity; - spin_unlock(&s->conf_lock); - max3100_dowork(s); - - if (UART_ENABLE_MS(&s->port, termios->c_cflag)) - max3100_enable_ms(&s->port); -} - -static void max3100_shutdown(struct uart_port *port) -{ - struct max3100_port *s = container_of(port, - struct max3100_port, - port); - - dev_dbg(&s->spi->dev, "%s\n", __func__); - - if (s->suspending) - return; - - s->force_end_work = 1; - - if (s->poll_time > 0) - del_timer_sync(&s->timer); - - if (s->workqueue) { - flush_workqueue(s->workqueue); - destroy_workqueue(s->workqueue); - s->workqueue = NULL; - } - if (s->irq) - free_irq(s->irq, s); - - /* set shutdown mode to save power */ - if (s->max3100_hw_suspend) - s->max3100_hw_suspend(1); - else { - u16 tx, rx; - - tx = MAX3100_WC | MAX3100_SHDN; - max3100_sr(s, tx, &rx); - } -} - -static int max3100_startup(struct uart_port *port) -{ - struct max3100_port *s = container_of(port, - struct max3100_port, - port); - char b[12]; - - dev_dbg(&s->spi->dev, "%s\n", __func__); - - s->conf = MAX3100_RM; - s->baud = s->crystal ? 230400 : 115200; - s->rx_enabled = 1; - - if (s->suspending) - return 0; - - s->force_end_work = 0; - s->parity = 0; - s->rts = 0; - - sprintf(b, "max3100-%d", s->minor); - s->workqueue = create_freezeable_workqueue(b); - if (!s->workqueue) { - dev_warn(&s->spi->dev, "cannot create workqueue\n"); - return -EBUSY; - } - INIT_WORK(&s->work, max3100_work); - - if (request_irq(s->irq, max3100_irq, - IRQF_TRIGGER_FALLING, "max3100", s) < 0) { - dev_warn(&s->spi->dev, "cannot allocate irq %d\n", s->irq); - s->irq = 0; - destroy_workqueue(s->workqueue); - s->workqueue = NULL; - return -EBUSY; - } - - if (s->loopback) { - u16 tx, rx; - tx = 0x4001; - max3100_sr(s, tx, &rx); - } - - if (s->max3100_hw_suspend) - s->max3100_hw_suspend(0); - s->conf_commit = 1; - max3100_dowork(s); - /* wait for clock to settle */ - msleep(50); - - max3100_enable_ms(&s->port); - - return 0; -} - -static const char *max3100_type(struct uart_port *port) -{ - struct max3100_port *s = container_of(port, - struct max3100_port, - port); - - dev_dbg(&s->spi->dev, "%s\n", __func__); - - return s->port.type == PORT_MAX3100 ? "MAX3100" : NULL; -} - -static void max3100_release_port(struct uart_port *port) -{ - struct max3100_port *s = container_of(port, - struct max3100_port, - port); - - dev_dbg(&s->spi->dev, "%s\n", __func__); -} - -static void max3100_config_port(struct uart_port *port, int flags) -{ - struct max3100_port *s = container_of(port, - struct max3100_port, - port); - - dev_dbg(&s->spi->dev, "%s\n", __func__); - - if (flags & UART_CONFIG_TYPE) - s->port.type = PORT_MAX3100; -} - -static int max3100_verify_port(struct uart_port *port, - struct serial_struct *ser) -{ - struct max3100_port *s = container_of(port, - struct max3100_port, - port); - int ret = -EINVAL; - - dev_dbg(&s->spi->dev, "%s\n", __func__); - - if (ser->type == PORT_UNKNOWN || ser->type == PORT_MAX3100) - ret = 0; - return ret; -} - -static void max3100_stop_tx(struct uart_port *port) -{ - struct max3100_port *s = container_of(port, - struct max3100_port, - port); - - dev_dbg(&s->spi->dev, "%s\n", __func__); -} - -static int max3100_request_port(struct uart_port *port) -{ - struct max3100_port *s = container_of(port, - struct max3100_port, - port); - - dev_dbg(&s->spi->dev, "%s\n", __func__); - return 0; -} - -static void max3100_break_ctl(struct uart_port *port, int break_state) -{ - struct max3100_port *s = container_of(port, - struct max3100_port, - port); - - dev_dbg(&s->spi->dev, "%s\n", __func__); -} - -static struct uart_ops max3100_ops = { - .tx_empty = max3100_tx_empty, - .set_mctrl = max3100_set_mctrl, - .get_mctrl = max3100_get_mctrl, - .stop_tx = max3100_stop_tx, - .start_tx = max3100_start_tx, - .stop_rx = max3100_stop_rx, - .enable_ms = max3100_enable_ms, - .break_ctl = max3100_break_ctl, - .startup = max3100_startup, - .shutdown = max3100_shutdown, - .set_termios = max3100_set_termios, - .type = max3100_type, - .release_port = max3100_release_port, - .request_port = max3100_request_port, - .config_port = max3100_config_port, - .verify_port = max3100_verify_port, -}; - -static struct uart_driver max3100_uart_driver = { - .owner = THIS_MODULE, - .driver_name = "ttyMAX", - .dev_name = "ttyMAX", - .major = MAX3100_MAJOR, - .minor = MAX3100_MINOR, - .nr = MAX_MAX3100, -}; -static int uart_driver_registered; - -static int __devinit max3100_probe(struct spi_device *spi) -{ - int i, retval; - struct plat_max3100 *pdata; - u16 tx, rx; - - mutex_lock(&max3100s_lock); - - if (!uart_driver_registered) { - uart_driver_registered = 1; - retval = uart_register_driver(&max3100_uart_driver); - if (retval) { - printk(KERN_ERR "Couldn't register max3100 uart driver\n"); - mutex_unlock(&max3100s_lock); - return retval; - } - } - - for (i = 0; i < MAX_MAX3100; i++) - if (!max3100s[i]) - break; - if (i == MAX_MAX3100) { - dev_warn(&spi->dev, "too many MAX3100 chips\n"); - mutex_unlock(&max3100s_lock); - return -ENOMEM; - } - - max3100s[i] = kzalloc(sizeof(struct max3100_port), GFP_KERNEL); - if (!max3100s[i]) { - dev_warn(&spi->dev, - "kmalloc for max3100 structure %d failed!\n", i); - mutex_unlock(&max3100s_lock); - return -ENOMEM; - } - max3100s[i]->spi = spi; - max3100s[i]->irq = spi->irq; - spin_lock_init(&max3100s[i]->conf_lock); - dev_set_drvdata(&spi->dev, max3100s[i]); - pdata = spi->dev.platform_data; - max3100s[i]->crystal = pdata->crystal; - max3100s[i]->loopback = pdata->loopback; - max3100s[i]->poll_time = pdata->poll_time * HZ / 1000; - if (pdata->poll_time > 0 && max3100s[i]->poll_time == 0) - max3100s[i]->poll_time = 1; - max3100s[i]->max3100_hw_suspend = pdata->max3100_hw_suspend; - max3100s[i]->minor = i; - init_timer(&max3100s[i]->timer); - max3100s[i]->timer.function = max3100_timeout; - max3100s[i]->timer.data = (unsigned long) max3100s[i]; - - dev_dbg(&spi->dev, "%s: adding port %d\n", __func__, i); - max3100s[i]->port.irq = max3100s[i]->irq; - max3100s[i]->port.uartclk = max3100s[i]->crystal ? 3686400 : 1843200; - max3100s[i]->port.fifosize = 16; - max3100s[i]->port.ops = &max3100_ops; - max3100s[i]->port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF; - max3100s[i]->port.line = i; - max3100s[i]->port.type = PORT_MAX3100; - max3100s[i]->port.dev = &spi->dev; - retval = uart_add_one_port(&max3100_uart_driver, &max3100s[i]->port); - if (retval < 0) - dev_warn(&spi->dev, - "uart_add_one_port failed for line %d with error %d\n", - i, retval); - - /* set shutdown mode to save power. Will be woken-up on open */ - if (max3100s[i]->max3100_hw_suspend) - max3100s[i]->max3100_hw_suspend(1); - else { - tx = MAX3100_WC | MAX3100_SHDN; - max3100_sr(max3100s[i], tx, &rx); - } - mutex_unlock(&max3100s_lock); - return 0; -} - -static int __devexit max3100_remove(struct spi_device *spi) -{ - struct max3100_port *s = dev_get_drvdata(&spi->dev); - int i; - - mutex_lock(&max3100s_lock); - - /* find out the index for the chip we are removing */ - for (i = 0; i < MAX_MAX3100; i++) - if (max3100s[i] == s) - break; - - dev_dbg(&spi->dev, "%s: removing port %d\n", __func__, i); - uart_remove_one_port(&max3100_uart_driver, &max3100s[i]->port); - kfree(max3100s[i]); - max3100s[i] = NULL; - - /* check if this is the last chip we have */ - for (i = 0; i < MAX_MAX3100; i++) - if (max3100s[i]) { - mutex_unlock(&max3100s_lock); - return 0; - } - pr_debug("removing max3100 driver\n"); - uart_unregister_driver(&max3100_uart_driver); - - mutex_unlock(&max3100s_lock); - return 0; -} - -#ifdef CONFIG_PM - -static int max3100_suspend(struct spi_device *spi, pm_message_t state) -{ - struct max3100_port *s = dev_get_drvdata(&spi->dev); - - dev_dbg(&s->spi->dev, "%s\n", __func__); - - disable_irq(s->irq); - - s->suspending = 1; - uart_suspend_port(&max3100_uart_driver, &s->port); - - if (s->max3100_hw_suspend) - s->max3100_hw_suspend(1); - else { - /* no HW suspend, so do SW one */ - u16 tx, rx; - - tx = MAX3100_WC | MAX3100_SHDN; - max3100_sr(s, tx, &rx); - } - return 0; -} - -static int max3100_resume(struct spi_device *spi) -{ - struct max3100_port *s = dev_get_drvdata(&spi->dev); - - dev_dbg(&s->spi->dev, "%s\n", __func__); - - if (s->max3100_hw_suspend) - s->max3100_hw_suspend(0); - uart_resume_port(&max3100_uart_driver, &s->port); - s->suspending = 0; - - enable_irq(s->irq); - - s->conf_commit = 1; - if (s->workqueue) - max3100_dowork(s); - - return 0; -} - -#else -#define max3100_suspend NULL -#define max3100_resume NULL -#endif - -static struct spi_driver max3100_driver = { - .driver = { - .name = "max3100", - .bus = &spi_bus_type, - .owner = THIS_MODULE, - }, - - .probe = max3100_probe, - .remove = __devexit_p(max3100_remove), - .suspend = max3100_suspend, - .resume = max3100_resume, -}; - -static int __init max3100_init(void) -{ - return spi_register_driver(&max3100_driver); -} -module_init(max3100_init); - -static void __exit max3100_exit(void) -{ - spi_unregister_driver(&max3100_driver); -} -module_exit(max3100_exit); - -MODULE_DESCRIPTION("MAX3100 driver"); -MODULE_AUTHOR("Christian Pellegrin <chripell@evolware.org>"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("spi:max3100"); diff --git a/drivers/serial/max3107-aava.c b/drivers/serial/max3107-aava.c deleted file mode 100644 index a1fe304f2f52..000000000000 --- a/drivers/serial/max3107-aava.c +++ /dev/null @@ -1,344 +0,0 @@ -/* - * max3107.c - spi uart protocol driver for Maxim 3107 - * Based on max3100.c - * by Christian Pellegrin <chripell@evolware.org> - * and max3110.c - * by Feng Tang <feng.tang@intel.com> - * - * Copyright (C) Aavamobile 2009 - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - */ - -#include <linux/delay.h> -#include <linux/device.h> -#include <linux/serial_core.h> -#include <linux/serial.h> -#include <linux/spi/spi.h> -#include <linux/freezer.h> -#include <linux/platform_device.h> -#include <linux/gpio.h> -#include <linux/sfi.h> -#include <asm/mrst.h> -#include "max3107.h" - -/* GPIO direction to input function */ -static int max3107_gpio_direction_in(struct gpio_chip *chip, unsigned offset) -{ - struct max3107_port *s = container_of(chip, struct max3107_port, chip); - u16 buf[1]; /* Buffer for SPI transfer */ - - if (offset >= MAX3107_GPIO_COUNT) { - dev_err(&s->spi->dev, "Invalid GPIO\n"); - return -EINVAL; - } - - /* Read current GPIO configuration register */ - buf[0] = MAX3107_GPIOCFG_REG; - /* Perform SPI transfer */ - if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 2)) { - dev_err(&s->spi->dev, "SPI transfer GPIO read failed\n"); - return -EIO; - } - buf[0] &= MAX3107_SPI_RX_DATA_MASK; - - /* Set GPIO to input */ - buf[0] &= ~(0x0001 << offset); - - /* Write new GPIO configuration register value */ - buf[0] |= (MAX3107_WRITE_BIT | MAX3107_GPIOCFG_REG); - /* Perform SPI transfer */ - if (max3107_rw(s, (u8 *)buf, NULL, 2)) { - dev_err(&s->spi->dev, "SPI transfer GPIO write failed\n"); - return -EIO; - } - return 0; -} - -/* GPIO direction to output function */ -static int max3107_gpio_direction_out(struct gpio_chip *chip, unsigned offset, - int value) -{ - struct max3107_port *s = container_of(chip, struct max3107_port, chip); - u16 buf[2]; /* Buffer for SPI transfers */ - - if (offset >= MAX3107_GPIO_COUNT) { - dev_err(&s->spi->dev, "Invalid GPIO\n"); - return -EINVAL; - } - - /* Read current GPIO configuration and data registers */ - buf[0] = MAX3107_GPIOCFG_REG; - buf[1] = MAX3107_GPIODATA_REG; - /* Perform SPI transfer */ - if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 4)) { - dev_err(&s->spi->dev, "SPI transfer gpio failed\n"); - return -EIO; - } - buf[0] &= MAX3107_SPI_RX_DATA_MASK; - buf[1] &= MAX3107_SPI_RX_DATA_MASK; - - /* Set GPIO to output */ - buf[0] |= (0x0001 << offset); - /* Set value */ - if (value) - buf[1] |= (0x0001 << offset); - else - buf[1] &= ~(0x0001 << offset); - - /* Write new GPIO configuration and data register values */ - buf[0] |= (MAX3107_WRITE_BIT | MAX3107_GPIOCFG_REG); - buf[1] |= (MAX3107_WRITE_BIT | MAX3107_GPIODATA_REG); - /* Perform SPI transfer */ - if (max3107_rw(s, (u8 *)buf, NULL, 4)) { - dev_err(&s->spi->dev, - "SPI transfer for GPIO conf data w failed\n"); - return -EIO; - } - return 0; -} - -/* GPIO value query function */ -static int max3107_gpio_get(struct gpio_chip *chip, unsigned offset) -{ - struct max3107_port *s = container_of(chip, struct max3107_port, chip); - u16 buf[1]; /* Buffer for SPI transfer */ - - if (offset >= MAX3107_GPIO_COUNT) { - dev_err(&s->spi->dev, "Invalid GPIO\n"); - return -EINVAL; - } - - /* Read current GPIO data register */ - buf[0] = MAX3107_GPIODATA_REG; - /* Perform SPI transfer */ - if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 2)) { - dev_err(&s->spi->dev, "SPI transfer GPIO data r failed\n"); - return -EIO; - } - buf[0] &= MAX3107_SPI_RX_DATA_MASK; - - /* Return value */ - return buf[0] & (0x0001 << offset); -} - -/* GPIO value set function */ -static void max3107_gpio_set(struct gpio_chip *chip, unsigned offset, int value) -{ - struct max3107_port *s = container_of(chip, struct max3107_port, chip); - u16 buf[2]; /* Buffer for SPI transfers */ - - if (offset >= MAX3107_GPIO_COUNT) { - dev_err(&s->spi->dev, "Invalid GPIO\n"); - return; - } - - /* Read current GPIO configuration registers*/ - buf[0] = MAX3107_GPIODATA_REG; - buf[1] = MAX3107_GPIOCFG_REG; - /* Perform SPI transfer */ - if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 4)) { - dev_err(&s->spi->dev, - "SPI transfer for GPIO data and config read failed\n"); - return; - } - buf[0] &= MAX3107_SPI_RX_DATA_MASK; - buf[1] &= MAX3107_SPI_RX_DATA_MASK; - - if (!(buf[1] & (0x0001 << offset))) { - /* Configured as input, can't set value */ - dev_warn(&s->spi->dev, - "Trying to set value for input GPIO\n"); - return; - } - - /* Set value */ - if (value) - buf[0] |= (0x0001 << offset); - else - buf[0] &= ~(0x0001 << offset); - - /* Write new GPIO data register value */ - buf[0] |= (MAX3107_WRITE_BIT | MAX3107_GPIODATA_REG); - /* Perform SPI transfer */ - if (max3107_rw(s, (u8 *)buf, NULL, 2)) - dev_err(&s->spi->dev, "SPI transfer GPIO data w failed\n"); -} - -/* GPIO chip data */ -static struct gpio_chip max3107_gpio_chip = { - .owner = THIS_MODULE, - .direction_input = max3107_gpio_direction_in, - .direction_output = max3107_gpio_direction_out, - .get = max3107_gpio_get, - .set = max3107_gpio_set, - .can_sleep = 1, - .base = MAX3107_GPIO_BASE, - .ngpio = MAX3107_GPIO_COUNT, -}; - -/** - * max3107_aava_reset - reset on AAVA systems - * @spi: The SPI device we are probing - * - * Reset the device ready for probing. - */ - -static int max3107_aava_reset(struct spi_device *spi) -{ - /* Reset the chip */ - if (gpio_request(MAX3107_RESET_GPIO, "max3107")) { - pr_err("Requesting RESET GPIO failed\n"); - return -EIO; - } - if (gpio_direction_output(MAX3107_RESET_GPIO, 0)) { - pr_err("Setting RESET GPIO to 0 failed\n"); - gpio_free(MAX3107_RESET_GPIO); - return -EIO; - } - msleep(MAX3107_RESET_DELAY); - if (gpio_direction_output(MAX3107_RESET_GPIO, 1)) { - pr_err("Setting RESET GPIO to 1 failed\n"); - gpio_free(MAX3107_RESET_GPIO); - return -EIO; - } - gpio_free(MAX3107_RESET_GPIO); - msleep(MAX3107_WAKEUP_DELAY); - return 0; -} - -static int max3107_aava_configure(struct max3107_port *s) -{ - int retval; - - /* Initialize GPIO chip data */ - s->chip = max3107_gpio_chip; - s->chip.label = s->spi->modalias; - s->chip.dev = &s->spi->dev; - - /* Add GPIO chip */ - retval = gpiochip_add(&s->chip); - if (retval) { - dev_err(&s->spi->dev, "Adding GPIO chip failed\n"); - return retval; - } - - /* Temporary fix for EV2 boot problems, set modem reset to 0 */ - max3107_gpio_direction_out(&s->chip, 3, 0); - return 0; -} - -#if 0 -/* This will get enabled once we have the board stuff merged for this - specific case */ - -static const struct baud_table brg13_ext[] = { - { 300, MAX3107_BRG13_B300 }, - { 600, MAX3107_BRG13_B600 }, - { 1200, MAX3107_BRG13_B1200 }, - { 2400, MAX3107_BRG13_B2400 }, - { 4800, MAX3107_BRG13_B4800 }, - { 9600, MAX3107_BRG13_B9600 }, - { 19200, MAX3107_BRG13_B19200 }, - { 57600, MAX3107_BRG13_B57600 }, - { 115200, MAX3107_BRG13_B115200 }, - { 230400, MAX3107_BRG13_B230400 }, - { 460800, MAX3107_BRG13_B460800 }, - { 921600, MAX3107_BRG13_B921600 }, - { 0, 0 } -}; - -static void max3107_aava_init(struct max3107_port *s) -{ - /*override for AAVA SC specific*/ - if (mrst_platform_id() == MRST_PLATFORM_AAVA_SC) { - if (get_koski_build_id() <= KOSKI_EV2) - if (s->ext_clk) { - s->brg_cfg = MAX3107_BRG13_B9600; - s->baud_tbl = (struct baud_table *)brg13_ext; - } - } -} -#endif - -static int __devexit max3107_aava_remove(struct spi_device *spi) -{ - struct max3107_port *s = dev_get_drvdata(&spi->dev); - - /* Remove GPIO chip */ - if (gpiochip_remove(&s->chip)) - dev_warn(&spi->dev, "Removing GPIO chip failed\n"); - - /* Then do the default remove */ - return max3107_remove(spi); -} - -/* Platform data */ -static struct max3107_plat aava_plat_data = { - .loopback = 0, - .ext_clk = 1, -/* .init = max3107_aava_init, */ - .configure = max3107_aava_configure, - .hw_suspend = max3107_hw_susp, - .polled_mode = 0, - .poll_time = 0, -}; - - -static int __devinit max3107_probe_aava(struct spi_device *spi) -{ - int err = max3107_aava_reset(spi); - if (err < 0) - return err; - return max3107_probe(spi, &aava_plat_data); -} - -/* Spi driver data */ -static struct spi_driver max3107_driver = { - .driver = { - .name = "aava-max3107", - .bus = &spi_bus_type, - .owner = THIS_MODULE, - }, - .probe = max3107_probe_aava, - .remove = __devexit_p(max3107_aava_remove), - .suspend = max3107_suspend, - .resume = max3107_resume, -}; - -/* Driver init function */ -static int __init max3107_init(void) -{ - return spi_register_driver(&max3107_driver); -} - -/* Driver exit function */ -static void __exit max3107_exit(void) -{ - spi_unregister_driver(&max3107_driver); -} - -module_init(max3107_init); -module_exit(max3107_exit); - -MODULE_DESCRIPTION("MAX3107 driver"); -MODULE_AUTHOR("Aavamobile"); -MODULE_ALIAS("aava-max3107-spi"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/serial/max3107.c b/drivers/serial/max3107.c deleted file mode 100644 index 910870edf708..000000000000 --- a/drivers/serial/max3107.c +++ /dev/null @@ -1,1213 +0,0 @@ -/* - * max3107.c - spi uart protocol driver for Maxim 3107 - * Based on max3100.c - * by Christian Pellegrin <chripell@evolware.org> - * and max3110.c - * by Feng Tang <feng.tang@intel.com> - * - * Copyright (C) Aavamobile 2009 - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - */ - -#include <linux/delay.h> -#include <linux/device.h> -#include <linux/serial_core.h> -#include <linux/serial.h> -#include <linux/gpio.h> -#include <linux/spi/spi.h> -#include <linux/freezer.h> -#include "max3107.h" - -static const struct baud_table brg26_ext[] = { - { 300, MAX3107_BRG26_B300 }, - { 600, MAX3107_BRG26_B600 }, - { 1200, MAX3107_BRG26_B1200 }, - { 2400, MAX3107_BRG26_B2400 }, - { 4800, MAX3107_BRG26_B4800 }, - { 9600, MAX3107_BRG26_B9600 }, - { 19200, MAX3107_BRG26_B19200 }, - { 57600, MAX3107_BRG26_B57600 }, - { 115200, MAX3107_BRG26_B115200 }, - { 230400, MAX3107_BRG26_B230400 }, - { 460800, MAX3107_BRG26_B460800 }, - { 921600, MAX3107_BRG26_B921600 }, - { 0, 0 } -}; - -static const struct baud_table brg13_int[] = { - { 300, MAX3107_BRG13_IB300 }, - { 600, MAX3107_BRG13_IB600 }, - { 1200, MAX3107_BRG13_IB1200 }, - { 2400, MAX3107_BRG13_IB2400 }, - { 4800, MAX3107_BRG13_IB4800 }, - { 9600, MAX3107_BRG13_IB9600 }, - { 19200, MAX3107_BRG13_IB19200 }, - { 57600, MAX3107_BRG13_IB57600 }, - { 115200, MAX3107_BRG13_IB115200 }, - { 230400, MAX3107_BRG13_IB230400 }, - { 460800, MAX3107_BRG13_IB460800 }, - { 921600, MAX3107_BRG13_IB921600 }, - { 0, 0 } -}; - -static u32 get_new_brg(int baud, struct max3107_port *s) -{ - int i; - const struct baud_table *baud_tbl = s->baud_tbl; - - for (i = 0; i < 13; i++) { - if (baud == baud_tbl[i].baud) - return baud_tbl[i].new_brg; - } - - return 0; -} - -/* Perform SPI transfer for write/read of device register(s) */ -int max3107_rw(struct max3107_port *s, u8 *tx, u8 *rx, int len) -{ - struct spi_message spi_msg; - struct spi_transfer spi_xfer; - - /* Initialize SPI ,message */ - spi_message_init(&spi_msg); - - /* Initialize SPI transfer */ - memset(&spi_xfer, 0, sizeof spi_xfer); - spi_xfer.len = len; - spi_xfer.tx_buf = tx; - spi_xfer.rx_buf = rx; - spi_xfer.speed_hz = MAX3107_SPI_SPEED; - - /* Add SPI transfer to SPI message */ - spi_message_add_tail(&spi_xfer, &spi_msg); - -#ifdef DBG_TRACE_SPI_DATA - { - int i; - pr_info("tx len %d:\n", spi_xfer.len); - for (i = 0 ; i < spi_xfer.len && i < 32 ; i++) - pr_info(" %x", ((u8 *)spi_xfer.tx_buf)[i]); - pr_info("\n"); - } -#endif - - /* Perform synchronous SPI transfer */ - if (spi_sync(s->spi, &spi_msg)) { - dev_err(&s->spi->dev, "spi_sync failure\n"); - return -EIO; - } - -#ifdef DBG_TRACE_SPI_DATA - if (spi_xfer.rx_buf) { - int i; - pr_info("rx len %d:\n", spi_xfer.len); - for (i = 0 ; i < spi_xfer.len && i < 32 ; i++) - pr_info(" %x", ((u8 *)spi_xfer.rx_buf)[i]); - pr_info("\n"); - } -#endif - return 0; -} -EXPORT_SYMBOL_GPL(max3107_rw); - -/* Puts received data to circular buffer */ -static void put_data_to_circ_buf(struct max3107_port *s, unsigned char *data, - int len) -{ - struct uart_port *port = &s->port; - struct tty_struct *tty; - - if (!port->state) - return; - - tty = port->state->port.tty; - if (!tty) - return; - - /* Insert received data */ - tty_insert_flip_string(tty, data, len); - /* Update RX counter */ - port->icount.rx += len; -} - -/* Handle data receiving */ -static void max3107_handlerx(struct max3107_port *s, u16 rxlvl) -{ - int i; - int j; - int len; /* SPI transfer buffer length */ - u16 *buf; - u8 *valid_str; - - if (!s->rx_enabled) - /* RX is disabled */ - return; - - if (rxlvl == 0) { - /* RX fifo is empty */ - return; - } else if (rxlvl >= MAX3107_RX_FIFO_SIZE) { - dev_warn(&s->spi->dev, "Possible RX FIFO overrun %d\n", rxlvl); - /* Ensure sanity of RX level */ - rxlvl = MAX3107_RX_FIFO_SIZE; - } - if ((s->rxbuf == 0) || (s->rxstr == 0)) { - dev_warn(&s->spi->dev, "Rx buffer/str isn't ready\n"); - return; - } - buf = s->rxbuf; - valid_str = s->rxstr; - while (rxlvl) { - pr_debug("rxlvl %d\n", rxlvl); - /* Clear buffer */ - memset(buf, 0, sizeof(u16) * (MAX3107_RX_FIFO_SIZE + 2)); - len = 0; - if (s->irqen_reg & MAX3107_IRQ_RXFIFO_BIT) { - /* First disable RX FIFO interrupt */ - pr_debug("Disabling RX INT\n"); - buf[0] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG); - s->irqen_reg &= ~MAX3107_IRQ_RXFIFO_BIT; - buf[0] |= s->irqen_reg; - len++; - } - /* Just increase the length by amount of words in FIFO since - * buffer was zeroed and SPI transfer of 0x0000 means reading - * from RX FIFO - */ - len += rxlvl; - /* Append RX level query */ - buf[len] = MAX3107_RXFIFOLVL_REG; - len++; - - /* Perform the SPI transfer */ - if (max3107_rw(s, (u8 *)buf, (u8 *)buf, len * 2)) { - dev_err(&s->spi->dev, "SPI transfer for RX h failed\n"); - return; - } - - /* Skip RX FIFO interrupt disabling word if it was added */ - j = ((len - 1) - rxlvl); - /* Read received words */ - for (i = 0; i < rxlvl; i++, j++) - valid_str[i] = (u8)buf[j]; - put_data_to_circ_buf(s, valid_str, rxlvl); - /* Get new RX level */ - rxlvl = (buf[len - 1] & MAX3107_SPI_RX_DATA_MASK); - } - - if (s->rx_enabled) { - /* RX still enabled, re-enable RX FIFO interrupt */ - pr_debug("Enabling RX INT\n"); - buf[0] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG); - s->irqen_reg |= MAX3107_IRQ_RXFIFO_BIT; - buf[0] |= s->irqen_reg; - if (max3107_rw(s, (u8 *)buf, NULL, 2)) - dev_err(&s->spi->dev, "RX FIFO INT enabling failed\n"); - } - - /* Push the received data to receivers */ - if (s->port.state->port.tty) - tty_flip_buffer_push(s->port.state->port.tty); -} - - -/* Handle data sending */ -static void max3107_handletx(struct max3107_port *s) -{ - struct circ_buf *xmit = &s->port.state->xmit; - int i; - unsigned long flags; - int len; /* SPI transfer buffer length */ - u16 *buf; - - if (!s->tx_fifo_empty) - /* Don't send more data before previous data is sent */ - return; - - if (uart_circ_empty(xmit) || uart_tx_stopped(&s->port)) - /* No data to send or TX is stopped */ - return; - - if (!s->txbuf) { - dev_warn(&s->spi->dev, "Txbuf isn't ready\n"); - return; - } - buf = s->txbuf; - /* Get length of data pending in circular buffer */ - len = uart_circ_chars_pending(xmit); - if (len) { - /* Limit to size of TX FIFO */ - if (len > MAX3107_TX_FIFO_SIZE) - len = MAX3107_TX_FIFO_SIZE; - - pr_debug("txlen %d\n", len); - - /* Update TX counter */ - s->port.icount.tx += len; - - /* TX FIFO will no longer be empty */ - s->tx_fifo_empty = 0; - - i = 0; - if (s->irqen_reg & MAX3107_IRQ_TXEMPTY_BIT) { - /* First disable TX empty interrupt */ - pr_debug("Disabling TE INT\n"); - buf[i] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG); - s->irqen_reg &= ~MAX3107_IRQ_TXEMPTY_BIT; - buf[i] |= s->irqen_reg; - i++; - len++; - } - /* Add data to send */ - spin_lock_irqsave(&s->port.lock, flags); - for ( ; i < len ; i++) { - buf[i] = (MAX3107_WRITE_BIT | MAX3107_THR_REG); - buf[i] |= ((u16)xmit->buf[xmit->tail] & - MAX3107_SPI_TX_DATA_MASK); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - } - spin_unlock_irqrestore(&s->port.lock, flags); - if (!(s->irqen_reg & MAX3107_IRQ_TXEMPTY_BIT)) { - /* Enable TX empty interrupt */ - pr_debug("Enabling TE INT\n"); - buf[i] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG); - s->irqen_reg |= MAX3107_IRQ_TXEMPTY_BIT; - buf[i] |= s->irqen_reg; - i++; - len++; - } - if (!s->tx_enabled) { - /* Enable TX */ - pr_debug("Enable TX\n"); - buf[i] = (MAX3107_WRITE_BIT | MAX3107_MODE1_REG); - spin_lock_irqsave(&s->data_lock, flags); - s->mode1_reg &= ~MAX3107_MODE1_TXDIS_BIT; - buf[i] |= s->mode1_reg; - spin_unlock_irqrestore(&s->data_lock, flags); - s->tx_enabled = 1; - i++; - len++; - } - - /* Perform the SPI transfer */ - if (max3107_rw(s, (u8 *)buf, NULL, len*2)) { - dev_err(&s->spi->dev, - "SPI transfer TX handling failed\n"); - return; - } - } - - /* Indicate wake up if circular buffer is getting low on data */ - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&s->port); - -} - -/* Handle interrupts - * Also reads and returns current RX FIFO level - */ -static u16 handle_interrupt(struct max3107_port *s) -{ - u16 buf[4]; /* Buffer for SPI transfers */ - u8 irq_status; - u16 rx_level; - unsigned long flags; - - /* Read IRQ status register */ - buf[0] = MAX3107_IRQSTS_REG; - /* Read status IRQ status register */ - buf[1] = MAX3107_STS_IRQSTS_REG; - /* Read LSR IRQ status register */ - buf[2] = MAX3107_LSR_IRQSTS_REG; - /* Query RX level */ - buf[3] = MAX3107_RXFIFOLVL_REG; - - if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 8)) { - dev_err(&s->spi->dev, - "SPI transfer for INTR handling failed\n"); - return 0; - } - - irq_status = (u8)buf[0]; - pr_debug("IRQSTS %x\n", irq_status); - rx_level = (buf[3] & MAX3107_SPI_RX_DATA_MASK); - - if (irq_status & MAX3107_IRQ_LSR_BIT) { - /* LSR interrupt */ - if (buf[2] & MAX3107_LSR_RXTO_BIT) - /* RX timeout interrupt, - * handled by normal RX handling - */ - pr_debug("RX TO INT\n"); - } - - if (irq_status & MAX3107_IRQ_TXEMPTY_BIT) { - /* Tx empty interrupt, - * disable TX and set tx_fifo_empty flag - */ - pr_debug("TE INT, disabling TX\n"); - buf[0] = (MAX3107_WRITE_BIT | MAX3107_MODE1_REG); - spin_lock_irqsave(&s->data_lock, flags); - s->mode1_reg |= MAX3107_MODE1_TXDIS_BIT; - buf[0] |= s->mode1_reg; - spin_unlock_irqrestore(&s->data_lock, flags); - if (max3107_rw(s, (u8 *)buf, NULL, 2)) - dev_err(&s->spi->dev, "SPI transfer TX dis failed\n"); - s->tx_enabled = 0; - s->tx_fifo_empty = 1; - } - - if (irq_status & MAX3107_IRQ_RXFIFO_BIT) - /* RX FIFO interrupt, - * handled by normal RX handling - */ - pr_debug("RFIFO INT\n"); - - /* Return RX level */ - return rx_level; -} - -/* Trigger work thread*/ -static void max3107_dowork(struct max3107_port *s) -{ - if (!work_pending(&s->work) && !freezing(current) && !s->suspended) - queue_work(s->workqueue, &s->work); - else - dev_warn(&s->spi->dev, "interrup isn't serviced normally!\n"); -} - -/* Work thread */ -static void max3107_work(struct work_struct *w) -{ - struct max3107_port *s = container_of(w, struct max3107_port, work); - u16 rxlvl = 0; - int len; /* SPI transfer buffer length */ - u16 buf[5]; /* Buffer for SPI transfers */ - unsigned long flags; - - /* Start by reading current RX FIFO level */ - buf[0] = MAX3107_RXFIFOLVL_REG; - if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 2)) { - dev_err(&s->spi->dev, "SPI transfer RX lev failed\n"); - rxlvl = 0; - } else { - rxlvl = (buf[0] & MAX3107_SPI_RX_DATA_MASK); - } - - do { - pr_debug("rxlvl %d\n", rxlvl); - - /* Handle RX */ - max3107_handlerx(s, rxlvl); - rxlvl = 0; - - if (s->handle_irq) { - /* Handle pending interrupts - * We also get new RX FIFO level since new data may - * have been received while pushing received data to - * receivers - */ - s->handle_irq = 0; - rxlvl = handle_interrupt(s); - } - - /* Handle TX */ - max3107_handletx(s); - - /* Handle configuration changes */ - len = 0; - spin_lock_irqsave(&s->data_lock, flags); - if (s->mode1_commit) { - pr_debug("mode1_commit\n"); - buf[len] = (MAX3107_WRITE_BIT | MAX3107_MODE1_REG); - buf[len++] |= s->mode1_reg; - s->mode1_commit = 0; - } - if (s->lcr_commit) { - pr_debug("lcr_commit\n"); - buf[len] = (MAX3107_WRITE_BIT | MAX3107_LCR_REG); - buf[len++] |= s->lcr_reg; - s->lcr_commit = 0; - } - if (s->brg_commit) { - pr_debug("brg_commit\n"); - buf[len] = (MAX3107_WRITE_BIT | MAX3107_BRGDIVMSB_REG); - buf[len++] |= ((s->brg_cfg >> 16) & - MAX3107_SPI_TX_DATA_MASK); - buf[len] = (MAX3107_WRITE_BIT | MAX3107_BRGDIVLSB_REG); - buf[len++] |= ((s->brg_cfg >> 8) & - MAX3107_SPI_TX_DATA_MASK); - buf[len] = (MAX3107_WRITE_BIT | MAX3107_BRGCFG_REG); - buf[len++] |= ((s->brg_cfg) & 0xff); - s->brg_commit = 0; - } - spin_unlock_irqrestore(&s->data_lock, flags); - - if (len > 0) { - if (max3107_rw(s, (u8 *)buf, NULL, len * 2)) - dev_err(&s->spi->dev, - "SPI transfer config failed\n"); - } - - /* Reloop if interrupt handling indicated data in RX FIFO */ - } while (rxlvl); - -} - -/* Set sleep mode */ -static void max3107_set_sleep(struct max3107_port *s, int mode) -{ - u16 buf[1]; /* Buffer for SPI transfer */ - unsigned long flags; - pr_debug("enter, mode %d\n", mode); - - buf[0] = (MAX3107_WRITE_BIT | MAX3107_MODE1_REG); - spin_lock_irqsave(&s->data_lock, flags); - switch (mode) { - case MAX3107_DISABLE_FORCED_SLEEP: - s->mode1_reg &= ~MAX3107_MODE1_FORCESLEEP_BIT; - break; - case MAX3107_ENABLE_FORCED_SLEEP: - s->mode1_reg |= MAX3107_MODE1_FORCESLEEP_BIT; - break; - case MAX3107_DISABLE_AUTOSLEEP: - s->mode1_reg &= ~MAX3107_MODE1_AUTOSLEEP_BIT; - break; - case MAX3107_ENABLE_AUTOSLEEP: - s->mode1_reg |= MAX3107_MODE1_AUTOSLEEP_BIT; - break; - default: - spin_unlock_irqrestore(&s->data_lock, flags); - dev_warn(&s->spi->dev, "invalid sleep mode\n"); - return; - } - buf[0] |= s->mode1_reg; - spin_unlock_irqrestore(&s->data_lock, flags); - - if (max3107_rw(s, (u8 *)buf, NULL, 2)) - dev_err(&s->spi->dev, "SPI transfer sleep mode failed\n"); - - if (mode == MAX3107_DISABLE_AUTOSLEEP || - mode == MAX3107_DISABLE_FORCED_SLEEP) - msleep(MAX3107_WAKEUP_DELAY); -} - -/* Perform full register initialization */ -static void max3107_register_init(struct max3107_port *s) -{ - u16 buf[11]; /* Buffer for SPI transfers */ - - /* 1. Configure baud rate, 9600 as default */ - s->baud = 9600; - /* the below is default*/ - if (s->ext_clk) { - s->brg_cfg = MAX3107_BRG26_B9600; - s->baud_tbl = (struct baud_table *)brg26_ext; - } else { - s->brg_cfg = MAX3107_BRG13_IB9600; - s->baud_tbl = (struct baud_table *)brg13_int; - } - - if (s->pdata->init) - s->pdata->init(s); - - buf[0] = (MAX3107_WRITE_BIT | MAX3107_BRGDIVMSB_REG) - | ((s->brg_cfg >> 16) & MAX3107_SPI_TX_DATA_MASK); - buf[1] = (MAX3107_WRITE_BIT | MAX3107_BRGDIVLSB_REG) - | ((s->brg_cfg >> 8) & MAX3107_SPI_TX_DATA_MASK); - buf[2] = (MAX3107_WRITE_BIT | MAX3107_BRGCFG_REG) - | ((s->brg_cfg) & 0xff); - - /* 2. Configure LCR register, 8N1 mode by default */ - s->lcr_reg = MAX3107_LCR_WORD_LEN_8; - buf[3] = (MAX3107_WRITE_BIT | MAX3107_LCR_REG) - | s->lcr_reg; - - /* 3. Configure MODE 1 register */ - s->mode1_reg = 0; - /* Enable IRQ pin */ - s->mode1_reg |= MAX3107_MODE1_IRQSEL_BIT; - /* Disable TX */ - s->mode1_reg |= MAX3107_MODE1_TXDIS_BIT; - s->tx_enabled = 0; - /* RX is enabled */ - s->rx_enabled = 1; - buf[4] = (MAX3107_WRITE_BIT | MAX3107_MODE1_REG) - | s->mode1_reg; - - /* 4. Configure MODE 2 register */ - buf[5] = (MAX3107_WRITE_BIT | MAX3107_MODE2_REG); - if (s->loopback) { - /* Enable loopback */ - buf[5] |= MAX3107_MODE2_LOOPBACK_BIT; - } - /* Reset FIFOs */ - buf[5] |= MAX3107_MODE2_FIFORST_BIT; - s->tx_fifo_empty = 1; - - /* 5. Configure FIFO trigger level register */ - buf[6] = (MAX3107_WRITE_BIT | MAX3107_FIFOTRIGLVL_REG); - /* RX FIFO trigger for 16 words, TX FIFO trigger not used */ - buf[6] |= (MAX3107_FIFOTRIGLVL_RX(16) | MAX3107_FIFOTRIGLVL_TX(0)); - - /* 6. Configure flow control levels */ - buf[7] = (MAX3107_WRITE_BIT | MAX3107_FLOWLVL_REG); - /* Flow control halt level 96, resume level 48 */ - buf[7] |= (MAX3107_FLOWLVL_RES(48) | MAX3107_FLOWLVL_HALT(96)); - - /* 7. Configure flow control */ - buf[8] = (MAX3107_WRITE_BIT | MAX3107_FLOWCTRL_REG); - /* Enable auto CTS and auto RTS flow control */ - buf[8] |= (MAX3107_FLOWCTRL_AUTOCTS_BIT | MAX3107_FLOWCTRL_AUTORTS_BIT); - - /* 8. Configure RX timeout register */ - buf[9] = (MAX3107_WRITE_BIT | MAX3107_RXTO_REG); - /* Timeout after 48 character intervals */ - buf[9] |= 0x0030; - - /* 9. Configure LSR interrupt enable register */ - buf[10] = (MAX3107_WRITE_BIT | MAX3107_LSR_IRQEN_REG); - /* Enable RX timeout interrupt */ - buf[10] |= MAX3107_LSR_RXTO_BIT; - - /* Perform SPI transfer */ - if (max3107_rw(s, (u8 *)buf, NULL, 22)) - dev_err(&s->spi->dev, "SPI transfer for init failed\n"); - - /* 10. Clear IRQ status register by reading it */ - buf[0] = MAX3107_IRQSTS_REG; - - /* 11. Configure interrupt enable register */ - /* Enable LSR interrupt */ - s->irqen_reg = MAX3107_IRQ_LSR_BIT; - /* Enable RX FIFO interrupt */ - s->irqen_reg |= MAX3107_IRQ_RXFIFO_BIT; - buf[1] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG) - | s->irqen_reg; - - /* 12. Clear FIFO reset that was set in step 6 */ - buf[2] = (MAX3107_WRITE_BIT | MAX3107_MODE2_REG); - if (s->loopback) { - /* Keep loopback enabled */ - buf[2] |= MAX3107_MODE2_LOOPBACK_BIT; - } - - /* Perform SPI transfer */ - if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 6)) - dev_err(&s->spi->dev, "SPI transfer for init failed\n"); - -} - -/* IRQ handler */ -static irqreturn_t max3107_irq(int irqno, void *dev_id) -{ - struct max3107_port *s = dev_id; - - if (irqno != s->spi->irq) { - /* Unexpected IRQ */ - return IRQ_NONE; - } - - /* Indicate irq */ - s->handle_irq = 1; - - /* Trigger work thread */ - max3107_dowork(s); - - return IRQ_HANDLED; -} - -/* HW suspension function - * - * Currently autosleep is used to decrease current consumption, alternative - * approach would be to set the chip to reset mode if UART is not being - * used but that would mess the GPIOs - * - */ -void max3107_hw_susp(struct max3107_port *s, int suspend) -{ - pr_debug("enter, suspend %d\n", suspend); - - if (suspend) { - /* Suspend requested, - * enable autosleep to decrease current consumption - */ - s->suspended = 1; - max3107_set_sleep(s, MAX3107_ENABLE_AUTOSLEEP); - } else { - /* Resume requested, - * disable autosleep - */ - s->suspended = 0; - max3107_set_sleep(s, MAX3107_DISABLE_AUTOSLEEP); - } -} -EXPORT_SYMBOL_GPL(max3107_hw_susp); - -/* Modem status IRQ enabling */ -static void max3107_enable_ms(struct uart_port *port) -{ - /* Modem status not supported */ -} - -/* Data send function */ -static void max3107_start_tx(struct uart_port *port) -{ - struct max3107_port *s = container_of(port, struct max3107_port, port); - - /* Trigger work thread for sending data */ - max3107_dowork(s); -} - -/* Function for checking that there is no pending transfers */ -static unsigned int max3107_tx_empty(struct uart_port *port) -{ - struct max3107_port *s = container_of(port, struct max3107_port, port); - - pr_debug("returning %d\n", - (s->tx_fifo_empty && uart_circ_empty(&s->port.state->xmit))); - return s->tx_fifo_empty && uart_circ_empty(&s->port.state->xmit); -} - -/* Function for stopping RX */ -static void max3107_stop_rx(struct uart_port *port) -{ - struct max3107_port *s = container_of(port, struct max3107_port, port); - unsigned long flags; - - /* Set RX disabled in MODE 1 register */ - spin_lock_irqsave(&s->data_lock, flags); - s->mode1_reg |= MAX3107_MODE1_RXDIS_BIT; - s->mode1_commit = 1; - spin_unlock_irqrestore(&s->data_lock, flags); - /* Set RX disabled */ - s->rx_enabled = 0; - /* Trigger work thread for doing the actual configuration change */ - max3107_dowork(s); -} - -/* Function for returning control pin states */ -static unsigned int max3107_get_mctrl(struct uart_port *port) -{ - /* DCD and DSR are not wired and CTS/RTS is handled automatically - * so just indicate DSR and CAR asserted - */ - return TIOCM_DSR | TIOCM_CAR; -} - -/* Function for setting control pin states */ -static void max3107_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - /* DCD and DSR are not wired and CTS/RTS is hadnled automatically - * so do nothing - */ -} - -/* Function for configuring UART parameters */ -static void max3107_set_termios(struct uart_port *port, - struct ktermios *termios, - struct ktermios *old) -{ - struct max3107_port *s = container_of(port, struct max3107_port, port); - struct tty_struct *tty; - int baud; - u16 new_lcr = 0; - u32 new_brg = 0; - unsigned long flags; - - if (!port->state) - return; - - tty = port->state->port.tty; - if (!tty) - return; - - /* Get new LCR register values */ - /* Word size */ - if ((termios->c_cflag & CSIZE) == CS7) - new_lcr |= MAX3107_LCR_WORD_LEN_7; - else - new_lcr |= MAX3107_LCR_WORD_LEN_8; - - /* Parity */ - if (termios->c_cflag & PARENB) { - new_lcr |= MAX3107_LCR_PARITY_BIT; - if (!(termios->c_cflag & PARODD)) - new_lcr |= MAX3107_LCR_EVENPARITY_BIT; - } - - /* Stop bits */ - if (termios->c_cflag & CSTOPB) { - /* 2 stop bits */ - new_lcr |= MAX3107_LCR_STOPLEN_BIT; - } - - /* Mask termios capabilities we don't support */ - termios->c_cflag &= ~CMSPAR; - - /* Set status ignore mask */ - s->port.ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - s->port.ignore_status_mask |= MAX3107_ALL_ERRORS; - - /* Set low latency to immediately handle pushed data */ - s->port.state->port.tty->low_latency = 1; - - /* Get new baud rate generator configuration */ - baud = tty_get_baud_rate(tty); - - spin_lock_irqsave(&s->data_lock, flags); - new_brg = get_new_brg(baud, s); - /* if can't find the corrent config, use previous */ - if (!new_brg) { - baud = s->baud; - new_brg = s->brg_cfg; - } - spin_unlock_irqrestore(&s->data_lock, flags); - tty_termios_encode_baud_rate(termios, baud, baud); - s->baud = baud; - - /* Update timeout according to new baud rate */ - uart_update_timeout(port, termios->c_cflag, baud); - - spin_lock_irqsave(&s->data_lock, flags); - if (s->lcr_reg != new_lcr) { - s->lcr_reg = new_lcr; - s->lcr_commit = 1; - } - if (s->brg_cfg != new_brg) { - s->brg_cfg = new_brg; - s->brg_commit = 1; - } - spin_unlock_irqrestore(&s->data_lock, flags); - - /* Trigger work thread for doing the actual configuration change */ - max3107_dowork(s); -} - -/* Port shutdown function */ -static void max3107_shutdown(struct uart_port *port) -{ - struct max3107_port *s = container_of(port, struct max3107_port, port); - - if (s->suspended && s->pdata->hw_suspend) - s->pdata->hw_suspend(s, 0); - - /* Free the interrupt */ - free_irq(s->spi->irq, s); - - if (s->workqueue) { - /* Flush and destroy work queue */ - flush_workqueue(s->workqueue); - destroy_workqueue(s->workqueue); - s->workqueue = NULL; - } - - /* Suspend HW */ - if (s->pdata->hw_suspend) - s->pdata->hw_suspend(s, 1); -} - -/* Port startup function */ -static int max3107_startup(struct uart_port *port) -{ - struct max3107_port *s = container_of(port, struct max3107_port, port); - - /* Initialize work queue */ - s->workqueue = create_freezeable_workqueue("max3107"); - if (!s->workqueue) { - dev_err(&s->spi->dev, "Workqueue creation failed\n"); - return -EBUSY; - } - INIT_WORK(&s->work, max3107_work); - - /* Setup IRQ */ - if (request_irq(s->spi->irq, max3107_irq, IRQF_TRIGGER_FALLING, - "max3107", s)) { - dev_err(&s->spi->dev, "IRQ reguest failed\n"); - destroy_workqueue(s->workqueue); - s->workqueue = NULL; - return -EBUSY; - } - - /* Resume HW */ - if (s->pdata->hw_suspend) - s->pdata->hw_suspend(s, 0); - - /* Init registers */ - max3107_register_init(s); - - return 0; -} - -/* Port type function */ -static const char *max3107_type(struct uart_port *port) -{ - struct max3107_port *s = container_of(port, struct max3107_port, port); - return s->spi->modalias; -} - -/* Port release function */ -static void max3107_release_port(struct uart_port *port) -{ - /* Do nothing */ -} - -/* Port request function */ -static int max3107_request_port(struct uart_port *port) -{ - /* Do nothing */ - return 0; -} - -/* Port config function */ -static void max3107_config_port(struct uart_port *port, int flags) -{ - struct max3107_port *s = container_of(port, struct max3107_port, port); - s->port.type = PORT_MAX3107; -} - -/* Port verify function */ -static int max3107_verify_port(struct uart_port *port, - struct serial_struct *ser) -{ - if (ser->type == PORT_UNKNOWN || ser->type == PORT_MAX3107) - return 0; - - return -EINVAL; -} - -/* Port stop TX function */ -static void max3107_stop_tx(struct uart_port *port) -{ - /* Do nothing */ -} - -/* Port break control function */ -static void max3107_break_ctl(struct uart_port *port, int break_state) -{ - /* We don't support break control, do nothing */ -} - - -/* Port functions */ -static struct uart_ops max3107_ops = { - .tx_empty = max3107_tx_empty, - .set_mctrl = max3107_set_mctrl, - .get_mctrl = max3107_get_mctrl, - .stop_tx = max3107_stop_tx, - .start_tx = max3107_start_tx, - .stop_rx = max3107_stop_rx, - .enable_ms = max3107_enable_ms, - .break_ctl = max3107_break_ctl, - .startup = max3107_startup, - .shutdown = max3107_shutdown, - .set_termios = max3107_set_termios, - .type = max3107_type, - .release_port = max3107_release_port, - .request_port = max3107_request_port, - .config_port = max3107_config_port, - .verify_port = max3107_verify_port, -}; - -/* UART driver data */ -static struct uart_driver max3107_uart_driver = { - .owner = THIS_MODULE, - .driver_name = "ttyMAX", - .dev_name = "ttyMAX", - .nr = 1, -}; - -static int driver_registered = 0; - - - -/* 'Generic' platform data */ -static struct max3107_plat generic_plat_data = { - .loopback = 0, - .ext_clk = 1, - .hw_suspend = max3107_hw_susp, - .polled_mode = 0, - .poll_time = 0, -}; - - -/*******************************************************************/ - -/** - * max3107_probe - SPI bus probe entry point - * @spi: the spi device - * - * SPI wants us to probe this device and if appropriate claim it. - * Perform any platform specific requirements and then initialise - * the device. - */ - -int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata) -{ - struct max3107_port *s; - u16 buf[2]; /* Buffer for SPI transfers */ - int retval; - - pr_info("enter max3107 probe\n"); - - /* Allocate port structure */ - s = kzalloc(sizeof(*s), GFP_KERNEL); - if (!s) { - pr_err("Allocating port structure failed\n"); - return -ENOMEM; - } - - s->pdata = pdata; - - /* SPI Rx buffer - * +2 for RX FIFO interrupt - * disabling and RX level query - */ - s->rxbuf = kzalloc(sizeof(u16) * (MAX3107_RX_FIFO_SIZE+2), GFP_KERNEL); - if (!s->rxbuf) { - pr_err("Allocating RX buffer failed\n"); - retval = -ENOMEM; - goto err_free4; - } - s->rxstr = kzalloc(sizeof(u8) * MAX3107_RX_FIFO_SIZE, GFP_KERNEL); - if (!s->rxstr) { - pr_err("Allocating RX buffer failed\n"); - retval = -ENOMEM; - goto err_free3; - } - /* SPI Tx buffer - * SPI transfer buffer - * +3 for TX FIFO empty - * interrupt disabling and - * enabling and TX enabling - */ - s->txbuf = kzalloc(sizeof(u16) * MAX3107_TX_FIFO_SIZE + 3, GFP_KERNEL); - if (!s->txbuf) { - pr_err("Allocating TX buffer failed\n"); - retval = -ENOMEM; - goto err_free2; - } - /* Initialize shared data lock */ - spin_lock_init(&s->data_lock); - - /* SPI intializations */ - dev_set_drvdata(&spi->dev, s); - spi->mode = SPI_MODE_0; - spi->dev.platform_data = pdata; - spi->bits_per_word = 16; - s->ext_clk = pdata->ext_clk; - s->loopback = pdata->loopback; - spi_setup(spi); - s->spi = spi; - - /* Check REV ID to ensure we are talking to what we expect */ - buf[0] = MAX3107_REVID_REG; - if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 2)) { - dev_err(&s->spi->dev, "SPI transfer for REVID read failed\n"); - retval = -EIO; - goto err_free1; - } - if ((buf[0] & MAX3107_SPI_RX_DATA_MASK) != MAX3107_REVID1 && - (buf[0] & MAX3107_SPI_RX_DATA_MASK) != MAX3107_REVID2) { - dev_err(&s->spi->dev, "REVID %x does not match\n", - (buf[0] & MAX3107_SPI_RX_DATA_MASK)); - retval = -ENODEV; - goto err_free1; - } - - /* Disable all interrupts */ - buf[0] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG | 0x0000); - buf[0] |= 0x0000; - - /* Configure clock source */ - buf[1] = (MAX3107_WRITE_BIT | MAX3107_CLKSRC_REG); - if (s->ext_clk) { - /* External clock */ - buf[1] |= MAX3107_CLKSRC_EXTCLK_BIT; - } - - /* PLL bypass ON */ - buf[1] |= MAX3107_CLKSRC_PLLBYP_BIT; - - /* Perform SPI transfer */ - if (max3107_rw(s, (u8 *)buf, NULL, 4)) { - dev_err(&s->spi->dev, "SPI transfer for init failed\n"); - retval = -EIO; - goto err_free1; - } - - /* Register UART driver */ - if (!driver_registered) { - retval = uart_register_driver(&max3107_uart_driver); - if (retval) { - dev_err(&s->spi->dev, "Registering UART driver failed\n"); - goto err_free1; - } - driver_registered = 1; - } - - /* Initialize UART port data */ - s->port.fifosize = 128; - s->port.ops = &max3107_ops; - s->port.line = 0; - s->port.dev = &spi->dev; - s->port.uartclk = 9600; - s->port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF; - s->port.irq = s->spi->irq; - s->port.type = PORT_MAX3107; - - /* Add UART port */ - retval = uart_add_one_port(&max3107_uart_driver, &s->port); - if (retval < 0) { - dev_err(&s->spi->dev, "Adding UART port failed\n"); - goto err_free1; - } - - if (pdata->configure) { - retval = pdata->configure(s); - if (retval < 0) - goto err_free1; - } - - /* Go to suspend mode */ - if (pdata->hw_suspend) - pdata->hw_suspend(s, 1); - - return 0; - -err_free1: - kfree(s->txbuf); -err_free2: - kfree(s->rxstr); -err_free3: - kfree(s->rxbuf); -err_free4: - kfree(s); - return retval; -} -EXPORT_SYMBOL_GPL(max3107_probe); - -/* Driver remove function */ -int max3107_remove(struct spi_device *spi) -{ - struct max3107_port *s = dev_get_drvdata(&spi->dev); - - pr_info("enter max3107 remove\n"); - - /* Remove port */ - if (uart_remove_one_port(&max3107_uart_driver, &s->port)) - dev_warn(&s->spi->dev, "Removing UART port failed\n"); - - - /* Free TxRx buffer */ - kfree(s->rxbuf); - kfree(s->rxstr); - kfree(s->txbuf); - - /* Free port structure */ - kfree(s); - - return 0; -} -EXPORT_SYMBOL_GPL(max3107_remove); - -/* Driver suspend function */ -int max3107_suspend(struct spi_device *spi, pm_message_t state) -{ -#ifdef CONFIG_PM - struct max3107_port *s = dev_get_drvdata(&spi->dev); - - pr_debug("enter suspend\n"); - - /* Suspend UART port */ - uart_suspend_port(&max3107_uart_driver, &s->port); - - /* Go to suspend mode */ - if (s->pdata->hw_suspend) - s->pdata->hw_suspend(s, 1); -#endif /* CONFIG_PM */ - return 0; -} -EXPORT_SYMBOL_GPL(max3107_suspend); - -/* Driver resume function */ -int max3107_resume(struct spi_device *spi) -{ -#ifdef CONFIG_PM - struct max3107_port *s = dev_get_drvdata(&spi->dev); - - pr_debug("enter resume\n"); - - /* Resume from suspend */ - if (s->pdata->hw_suspend) - s->pdata->hw_suspend(s, 0); - - /* Resume UART port */ - uart_resume_port(&max3107_uart_driver, &s->port); -#endif /* CONFIG_PM */ - return 0; -} -EXPORT_SYMBOL_GPL(max3107_resume); - -static int max3107_probe_generic(struct spi_device *spi) -{ - return max3107_probe(spi, &generic_plat_data); -} - -/* Spi driver data */ -static struct spi_driver max3107_driver = { - .driver = { - .name = "max3107", - .bus = &spi_bus_type, - .owner = THIS_MODULE, - }, - .probe = max3107_probe_generic, - .remove = __devexit_p(max3107_remove), - .suspend = max3107_suspend, - .resume = max3107_resume, -}; - -/* Driver init function */ -static int __init max3107_init(void) -{ - pr_info("enter max3107 init\n"); - return spi_register_driver(&max3107_driver); -} - -/* Driver exit function */ -static void __exit max3107_exit(void) -{ - pr_info("enter max3107 exit\n"); - /* Unregister UART driver */ - if (driver_registered) - uart_unregister_driver(&max3107_uart_driver); - spi_unregister_driver(&max3107_driver); -} - -module_init(max3107_init); -module_exit(max3107_exit); - -MODULE_DESCRIPTION("MAX3107 driver"); -MODULE_AUTHOR("Aavamobile"); -MODULE_ALIAS("max3107-spi"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/serial/max3107.h b/drivers/serial/max3107.h deleted file mode 100644 index 7ab632392502..000000000000 --- a/drivers/serial/max3107.h +++ /dev/null @@ -1,441 +0,0 @@ -/* - * max3107.h - spi uart protocol driver header for Maxim 3107 - * - * Copyright (C) Aavamobile 2009 - * Based on serial_max3100.h by Christian Pellegrin - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#ifndef _MAX3107_H -#define _MAX3107_H - -/* Serial error status definitions */ -#define MAX3107_PARITY_ERROR 1 -#define MAX3107_FRAME_ERROR 2 -#define MAX3107_OVERRUN_ERROR 4 -#define MAX3107_ALL_ERRORS (MAX3107_PARITY_ERROR | \ - MAX3107_FRAME_ERROR | \ - MAX3107_OVERRUN_ERROR) - -/* GPIO definitions */ -#define MAX3107_GPIO_BASE 88 -#define MAX3107_GPIO_COUNT 4 - - -/* GPIO connected to chip's reset pin */ -#define MAX3107_RESET_GPIO 87 - - -/* Chip reset delay */ -#define MAX3107_RESET_DELAY 10 - -/* Chip wakeup delay */ -#define MAX3107_WAKEUP_DELAY 50 - - -/* Sleep mode definitions */ -#define MAX3107_DISABLE_FORCED_SLEEP 0 -#define MAX3107_ENABLE_FORCED_SLEEP 1 -#define MAX3107_DISABLE_AUTOSLEEP 2 -#define MAX3107_ENABLE_AUTOSLEEP 3 - - -/* Definitions for register access with SPI transfers - * - * SPI transfer format: - * - * Master to slave bits xzzzzzzzyyyyyyyy - * Slave to master bits aaaaaaaabbbbbbbb - * - * where: - * x = 0 for reads, 1 for writes - * z = register address - * y = new register value if write, 0 if read - * a = unspecified - * b = register value if read, unspecified if write - */ - -/* SPI speed */ -#define MAX3107_SPI_SPEED (3125000 * 2) - -/* Write bit */ -#define MAX3107_WRITE_BIT (1 << 15) - -/* SPI TX data mask */ -#define MAX3107_SPI_RX_DATA_MASK (0x00ff) - -/* SPI RX data mask */ -#define MAX3107_SPI_TX_DATA_MASK (0x00ff) - -/* Register access masks */ -#define MAX3107_RHR_REG (0x0000) /* RX FIFO */ -#define MAX3107_THR_REG (0x0000) /* TX FIFO */ -#define MAX3107_IRQEN_REG (0x0100) /* IRQ enable */ -#define MAX3107_IRQSTS_REG (0x0200) /* IRQ status */ -#define MAX3107_LSR_IRQEN_REG (0x0300) /* LSR IRQ enable */ -#define MAX3107_LSR_IRQSTS_REG (0x0400) /* LSR IRQ status */ -#define MAX3107_SPCHR_IRQEN_REG (0x0500) /* Special char IRQ enable */ -#define MAX3107_SPCHR_IRQSTS_REG (0x0600) /* Special char IRQ status */ -#define MAX3107_STS_IRQEN_REG (0x0700) /* Status IRQ enable */ -#define MAX3107_STS_IRQSTS_REG (0x0800) /* Status IRQ status */ -#define MAX3107_MODE1_REG (0x0900) /* MODE1 */ -#define MAX3107_MODE2_REG (0x0a00) /* MODE2 */ -#define MAX3107_LCR_REG (0x0b00) /* LCR */ -#define MAX3107_RXTO_REG (0x0c00) /* RX timeout */ -#define MAX3107_HDPIXDELAY_REG (0x0d00) /* Auto transceiver delays */ -#define MAX3107_IRDA_REG (0x0e00) /* IRDA settings */ -#define MAX3107_FLOWLVL_REG (0x0f00) /* Flow control levels */ -#define MAX3107_FIFOTRIGLVL_REG (0x1000) /* FIFO IRQ trigger levels */ -#define MAX3107_TXFIFOLVL_REG (0x1100) /* TX FIFO level */ -#define MAX3107_RXFIFOLVL_REG (0x1200) /* RX FIFO level */ -#define MAX3107_FLOWCTRL_REG (0x1300) /* Flow control */ -#define MAX3107_XON1_REG (0x1400) /* XON1 character */ -#define MAX3107_XON2_REG (0x1500) /* XON2 character */ -#define MAX3107_XOFF1_REG (0x1600) /* XOFF1 character */ -#define MAX3107_XOFF2_REG (0x1700) /* XOFF2 character */ -#define MAX3107_GPIOCFG_REG (0x1800) /* GPIO config */ -#define MAX3107_GPIODATA_REG (0x1900) /* GPIO data */ -#define MAX3107_PLLCFG_REG (0x1a00) /* PLL config */ -#define MAX3107_BRGCFG_REG (0x1b00) /* Baud rate generator conf */ -#define MAX3107_BRGDIVLSB_REG (0x1c00) /* Baud rate divisor LSB */ -#define MAX3107_BRGDIVMSB_REG (0x1d00) /* Baud rate divisor MSB */ -#define MAX3107_CLKSRC_REG (0x1e00) /* Clock source */ -#define MAX3107_REVID_REG (0x1f00) /* Revision identification */ - -/* IRQ register bits */ -#define MAX3107_IRQ_LSR_BIT (1 << 0) /* LSR interrupt */ -#define MAX3107_IRQ_SPCHR_BIT (1 << 1) /* Special char interrupt */ -#define MAX3107_IRQ_STS_BIT (1 << 2) /* Status interrupt */ -#define MAX3107_IRQ_RXFIFO_BIT (1 << 3) /* RX FIFO interrupt */ -#define MAX3107_IRQ_TXFIFO_BIT (1 << 4) /* TX FIFO interrupt */ -#define MAX3107_IRQ_TXEMPTY_BIT (1 << 5) /* TX FIFO empty interrupt */ -#define MAX3107_IRQ_RXEMPTY_BIT (1 << 6) /* RX FIFO empty interrupt */ -#define MAX3107_IRQ_CTS_BIT (1 << 7) /* CTS interrupt */ - -/* LSR register bits */ -#define MAX3107_LSR_RXTO_BIT (1 << 0) /* RX timeout */ -#define MAX3107_LSR_RXOVR_BIT (1 << 1) /* RX overrun */ -#define MAX3107_LSR_RXPAR_BIT (1 << 2) /* RX parity error */ -#define MAX3107_LSR_FRERR_BIT (1 << 3) /* Frame error */ -#define MAX3107_LSR_RXBRK_BIT (1 << 4) /* RX break */ -#define MAX3107_LSR_RXNOISE_BIT (1 << 5) /* RX noise */ -#define MAX3107_LSR_UNDEF6_BIT (1 << 6) /* Undefined/not used */ -#define MAX3107_LSR_CTS_BIT (1 << 7) /* CTS pin state */ - -/* Special character register bits */ -#define MAX3107_SPCHR_XON1_BIT (1 << 0) /* XON1 character */ -#define MAX3107_SPCHR_XON2_BIT (1 << 1) /* XON2 character */ -#define MAX3107_SPCHR_XOFF1_BIT (1 << 2) /* XOFF1 character */ -#define MAX3107_SPCHR_XOFF2_BIT (1 << 3) /* XOFF2 character */ -#define MAX3107_SPCHR_BREAK_BIT (1 << 4) /* RX break */ -#define MAX3107_SPCHR_MULTIDROP_BIT (1 << 5) /* 9-bit multidrop addr char */ -#define MAX3107_SPCHR_UNDEF6_BIT (1 << 6) /* Undefined/not used */ -#define MAX3107_SPCHR_UNDEF7_BIT (1 << 7) /* Undefined/not used */ - -/* Status register bits */ -#define MAX3107_STS_GPIO0_BIT (1 << 0) /* GPIO 0 interrupt */ -#define MAX3107_STS_GPIO1_BIT (1 << 1) /* GPIO 1 interrupt */ -#define MAX3107_STS_GPIO2_BIT (1 << 2) /* GPIO 2 interrupt */ -#define MAX3107_STS_GPIO3_BIT (1 << 3) /* GPIO 3 interrupt */ -#define MAX3107_STS_UNDEF4_BIT (1 << 4) /* Undefined/not used */ -#define MAX3107_STS_CLKREADY_BIT (1 << 5) /* Clock ready */ -#define MAX3107_STS_SLEEP_BIT (1 << 6) /* Sleep interrupt */ -#define MAX3107_STS_UNDEF7_BIT (1 << 7) /* Undefined/not used */ - -/* MODE1 register bits */ -#define MAX3107_MODE1_RXDIS_BIT (1 << 0) /* RX disable */ -#define MAX3107_MODE1_TXDIS_BIT (1 << 1) /* TX disable */ -#define MAX3107_MODE1_TXHIZ_BIT (1 << 2) /* TX pin three-state */ -#define MAX3107_MODE1_RTSHIZ_BIT (1 << 3) /* RTS pin three-state */ -#define MAX3107_MODE1_TRNSCVCTRL_BIT (1 << 4) /* Transceiver ctrl enable */ -#define MAX3107_MODE1_FORCESLEEP_BIT (1 << 5) /* Force sleep mode */ -#define MAX3107_MODE1_AUTOSLEEP_BIT (1 << 6) /* Auto sleep enable */ -#define MAX3107_MODE1_IRQSEL_BIT (1 << 7) /* IRQ pin enable */ - -/* MODE2 register bits */ -#define MAX3107_MODE2_RST_BIT (1 << 0) /* Chip reset */ -#define MAX3107_MODE2_FIFORST_BIT (1 << 1) /* FIFO reset */ -#define MAX3107_MODE2_RXTRIGINV_BIT (1 << 2) /* RX FIFO INT invert */ -#define MAX3107_MODE2_RXEMPTINV_BIT (1 << 3) /* RX FIFO empty INT invert */ -#define MAX3107_MODE2_SPCHR_BIT (1 << 4) /* Special chr detect enable */ -#define MAX3107_MODE2_LOOPBACK_BIT (1 << 5) /* Internal loopback enable */ -#define MAX3107_MODE2_MULTIDROP_BIT (1 << 6) /* 9-bit multidrop enable */ -#define MAX3107_MODE2_ECHOSUPR_BIT (1 << 7) /* ECHO suppression enable */ - -/* LCR register bits */ -#define MAX3107_LCR_LENGTH0_BIT (1 << 0) /* Word length bit 0 */ -#define MAX3107_LCR_LENGTH1_BIT (1 << 1) /* Word length bit 1 - * - * Word length bits table: - * 00 -> 5 bit words - * 01 -> 6 bit words - * 10 -> 7 bit words - * 11 -> 8 bit words - */ -#define MAX3107_LCR_STOPLEN_BIT (1 << 2) /* STOP length bit - * - * STOP length bit table: - * 0 -> 1 stop bit - * 1 -> 1-1.5 stop bits if - * word length is 5, - * 2 stop bits otherwise - */ -#define MAX3107_LCR_PARITY_BIT (1 << 3) /* Parity bit enable */ -#define MAX3107_LCR_EVENPARITY_BIT (1 << 4) /* Even parity bit enable */ -#define MAX3107_LCR_FORCEPARITY_BIT (1 << 5) /* 9-bit multidrop parity */ -#define MAX3107_LCR_TXBREAK_BIT (1 << 6) /* TX break enable */ -#define MAX3107_LCR_RTS_BIT (1 << 7) /* RTS pin control */ -#define MAX3107_LCR_WORD_LEN_5 (0x0000) -#define MAX3107_LCR_WORD_LEN_6 (0x0001) -#define MAX3107_LCR_WORD_LEN_7 (0x0002) -#define MAX3107_LCR_WORD_LEN_8 (0x0003) - - -/* IRDA register bits */ -#define MAX3107_IRDA_IRDAEN_BIT (1 << 0) /* IRDA mode enable */ -#define MAX3107_IRDA_SIR_BIT (1 << 1) /* SIR mode enable */ -#define MAX3107_IRDA_SHORTIR_BIT (1 << 2) /* Short SIR mode enable */ -#define MAX3107_IRDA_MIR_BIT (1 << 3) /* MIR mode enable */ -#define MAX3107_IRDA_RXINV_BIT (1 << 4) /* RX logic inversion enable */ -#define MAX3107_IRDA_TXINV_BIT (1 << 5) /* TX logic inversion enable */ -#define MAX3107_IRDA_UNDEF6_BIT (1 << 6) /* Undefined/not used */ -#define MAX3107_IRDA_UNDEF7_BIT (1 << 7) /* Undefined/not used */ - -/* Flow control trigger level register masks */ -#define MAX3107_FLOWLVL_HALT_MASK (0x000f) /* Flow control halt level */ -#define MAX3107_FLOWLVL_RES_MASK (0x00f0) /* Flow control resume level */ -#define MAX3107_FLOWLVL_HALT(words) ((words/8) & 0x000f) -#define MAX3107_FLOWLVL_RES(words) (((words/8) & 0x000f) << 4) - -/* FIFO interrupt trigger level register masks */ -#define MAX3107_FIFOTRIGLVL_TX_MASK (0x000f) /* TX FIFO trigger level */ -#define MAX3107_FIFOTRIGLVL_RX_MASK (0x00f0) /* RX FIFO trigger level */ -#define MAX3107_FIFOTRIGLVL_TX(words) ((words/8) & 0x000f) -#define MAX3107_FIFOTRIGLVL_RX(words) (((words/8) & 0x000f) << 4) - -/* Flow control register bits */ -#define MAX3107_FLOWCTRL_AUTORTS_BIT (1 << 0) /* Auto RTS flow ctrl enable */ -#define MAX3107_FLOWCTRL_AUTOCTS_BIT (1 << 1) /* Auto CTS flow ctrl enable */ -#define MAX3107_FLOWCTRL_GPIADDR_BIT (1 << 2) /* Enables that GPIO inputs - * are used in conjunction with - * XOFF2 for definition of - * special character */ -#define MAX3107_FLOWCTRL_SWFLOWEN_BIT (1 << 3) /* Auto SW flow ctrl enable */ -#define MAX3107_FLOWCTRL_SWFLOW0_BIT (1 << 4) /* SWFLOW bit 0 */ -#define MAX3107_FLOWCTRL_SWFLOW1_BIT (1 << 5) /* SWFLOW bit 1 - * - * SWFLOW bits 1 & 0 table: - * 00 -> no transmitter flow - * control - * 01 -> receiver compares - * XON2 and XOFF2 - * and controls - * transmitter - * 10 -> receiver compares - * XON1 and XOFF1 - * and controls - * transmitter - * 11 -> receiver compares - * XON1, XON2, XOFF1 and - * XOFF2 and controls - * transmitter - */ -#define MAX3107_FLOWCTRL_SWFLOW2_BIT (1 << 6) /* SWFLOW bit 2 */ -#define MAX3107_FLOWCTRL_SWFLOW3_BIT (1 << 7) /* SWFLOW bit 3 - * - * SWFLOW bits 3 & 2 table: - * 00 -> no received flow - * control - * 01 -> transmitter generates - * XON2 and XOFF2 - * 10 -> transmitter generates - * XON1 and XOFF1 - * 11 -> transmitter generates - * XON1, XON2, XOFF1 and - * XOFF2 - */ - -/* GPIO configuration register bits */ -#define MAX3107_GPIOCFG_GP0OUT_BIT (1 << 0) /* GPIO 0 output enable */ -#define MAX3107_GPIOCFG_GP1OUT_BIT (1 << 1) /* GPIO 1 output enable */ -#define MAX3107_GPIOCFG_GP2OUT_BIT (1 << 2) /* GPIO 2 output enable */ -#define MAX3107_GPIOCFG_GP3OUT_BIT (1 << 3) /* GPIO 3 output enable */ -#define MAX3107_GPIOCFG_GP0OD_BIT (1 << 4) /* GPIO 0 open-drain enable */ -#define MAX3107_GPIOCFG_GP1OD_BIT (1 << 5) /* GPIO 1 open-drain enable */ -#define MAX3107_GPIOCFG_GP2OD_BIT (1 << 6) /* GPIO 2 open-drain enable */ -#define MAX3107_GPIOCFG_GP3OD_BIT (1 << 7) /* GPIO 3 open-drain enable */ - -/* GPIO DATA register bits */ -#define MAX3107_GPIODATA_GP0OUT_BIT (1 << 0) /* GPIO 0 output value */ -#define MAX3107_GPIODATA_GP1OUT_BIT (1 << 1) /* GPIO 1 output value */ -#define MAX3107_GPIODATA_GP2OUT_BIT (1 << 2) /* GPIO 2 output value */ -#define MAX3107_GPIODATA_GP3OUT_BIT (1 << 3) /* GPIO 3 output value */ -#define MAX3107_GPIODATA_GP0IN_BIT (1 << 4) /* GPIO 0 input value */ -#define MAX3107_GPIODATA_GP1IN_BIT (1 << 5) /* GPIO 1 input value */ -#define MAX3107_GPIODATA_GP2IN_BIT (1 << 6) /* GPIO 2 input value */ -#define MAX3107_GPIODATA_GP3IN_BIT (1 << 7) /* GPIO 3 input value */ - -/* PLL configuration register masks */ -#define MAX3107_PLLCFG_PREDIV_MASK (0x003f) /* PLL predivision value */ -#define MAX3107_PLLCFG_PLLFACTOR_MASK (0x00c0) /* PLL multiplication factor */ - -/* Baud rate generator configuration register masks and bits */ -#define MAX3107_BRGCFG_FRACT_MASK (0x000f) /* Fractional portion of - * Baud rate generator divisor - */ -#define MAX3107_BRGCFG_2XMODE_BIT (1 << 4) /* Double baud rate */ -#define MAX3107_BRGCFG_4XMODE_BIT (1 << 5) /* Quadruple baud rate */ -#define MAX3107_BRGCFG_UNDEF6_BIT (1 << 6) /* Undefined/not used */ -#define MAX3107_BRGCFG_UNDEF7_BIT (1 << 7) /* Undefined/not used */ - -/* Clock source register bits */ -#define MAX3107_CLKSRC_INTOSC_BIT (1 << 0) /* Internal osc enable */ -#define MAX3107_CLKSRC_CRYST_BIT (1 << 1) /* Crystal osc enable */ -#define MAX3107_CLKSRC_PLL_BIT (1 << 2) /* PLL enable */ -#define MAX3107_CLKSRC_PLLBYP_BIT (1 << 3) /* PLL bypass */ -#define MAX3107_CLKSRC_EXTCLK_BIT (1 << 4) /* External clock enable */ -#define MAX3107_CLKSRC_UNDEF5_BIT (1 << 5) /* Undefined/not used */ -#define MAX3107_CLKSRC_UNDEF6_BIT (1 << 6) /* Undefined/not used */ -#define MAX3107_CLKSRC_CLK2RTS_BIT (1 << 7) /* Baud clk to RTS pin */ - - -/* HW definitions */ -#define MAX3107_RX_FIFO_SIZE 128 -#define MAX3107_TX_FIFO_SIZE 128 -#define MAX3107_REVID1 0x00a0 -#define MAX3107_REVID2 0x00a1 - - -/* Baud rate generator configuration values for external clock 13MHz */ -#define MAX3107_BRG13_B300 (0x0A9400 | 0x05) -#define MAX3107_BRG13_B600 (0x054A00 | 0x03) -#define MAX3107_BRG13_B1200 (0x02A500 | 0x01) -#define MAX3107_BRG13_B2400 (0x015200 | 0x09) -#define MAX3107_BRG13_B4800 (0x00A900 | 0x04) -#define MAX3107_BRG13_B9600 (0x005400 | 0x0A) -#define MAX3107_BRG13_B19200 (0x002A00 | 0x05) -#define MAX3107_BRG13_B38400 (0x001500 | 0x03) -#define MAX3107_BRG13_B57600 (0x000E00 | 0x02) -#define MAX3107_BRG13_B115200 (0x000700 | 0x01) -#define MAX3107_BRG13_B230400 (0x000300 | 0x08) -#define MAX3107_BRG13_B460800 (0x000100 | 0x0c) -#define MAX3107_BRG13_B921600 (0x000100 | 0x1c) - -/* Baud rate generator configuration values for external clock 26MHz */ -#define MAX3107_BRG26_B300 (0x152800 | 0x0A) -#define MAX3107_BRG26_B600 (0x0A9400 | 0x05) -#define MAX3107_BRG26_B1200 (0x054A00 | 0x03) -#define MAX3107_BRG26_B2400 (0x02A500 | 0x01) -#define MAX3107_BRG26_B4800 (0x015200 | 0x09) -#define MAX3107_BRG26_B9600 (0x00A900 | 0x04) -#define MAX3107_BRG26_B19200 (0x005400 | 0x0A) -#define MAX3107_BRG26_B38400 (0x002A00 | 0x05) -#define MAX3107_BRG26_B57600 (0x001C00 | 0x03) -#define MAX3107_BRG26_B115200 (0x000E00 | 0x02) -#define MAX3107_BRG26_B230400 (0x000700 | 0x01) -#define MAX3107_BRG26_B460800 (0x000300 | 0x08) -#define MAX3107_BRG26_B921600 (0x000100 | 0x0C) - -/* Baud rate generator configuration values for internal clock */ -#define MAX3107_BRG13_IB300 (0x008000 | 0x00) -#define MAX3107_BRG13_IB600 (0x004000 | 0x00) -#define MAX3107_BRG13_IB1200 (0x002000 | 0x00) -#define MAX3107_BRG13_IB2400 (0x001000 | 0x00) -#define MAX3107_BRG13_IB4800 (0x000800 | 0x00) -#define MAX3107_BRG13_IB9600 (0x000400 | 0x00) -#define MAX3107_BRG13_IB19200 (0x000200 | 0x00) -#define MAX3107_BRG13_IB38400 (0x000100 | 0x00) -#define MAX3107_BRG13_IB57600 (0x000000 | 0x0B) -#define MAX3107_BRG13_IB115200 (0x000000 | 0x05) -#define MAX3107_BRG13_IB230400 (0x000000 | 0x03) -#define MAX3107_BRG13_IB460800 (0x000000 | 0x00) -#define MAX3107_BRG13_IB921600 (0x000000 | 0x00) - - -struct baud_table { - int baud; - u32 new_brg; -}; - -struct max3107_port { - /* UART port structure */ - struct uart_port port; - - /* SPI device structure */ - struct spi_device *spi; - -#if defined(CONFIG_GPIOLIB) - /* GPIO chip stucture */ - struct gpio_chip chip; -#endif - - /* Workqueue that does all the magic */ - struct workqueue_struct *workqueue; - struct work_struct work; - - /* Lock for shared data */ - spinlock_t data_lock; - - /* Device configuration */ - int ext_clk; /* 1 if external clock used */ - int loopback; /* Current loopback mode state */ - int baud; /* Current baud rate */ - - /* State flags */ - int suspended; /* Indicates suspend mode */ - int tx_fifo_empty; /* Flag for TX FIFO state */ - int rx_enabled; /* Flag for receiver state */ - int tx_enabled; /* Flag for transmitter state */ - - u16 irqen_reg; /* Current IRQ enable register value */ - /* Shared data */ - u16 mode1_reg; /* Current mode1 register value*/ - int mode1_commit; /* Flag for setting new mode1 register value */ - u16 lcr_reg; /* Current LCR register value */ - int lcr_commit; /* Flag for setting new LCR register value */ - u32 brg_cfg; /* Current Baud rate generator config */ - int brg_commit; /* Flag for setting new baud rate generator - * config - */ - struct baud_table *baud_tbl; - int handle_irq; /* Indicates that IRQ should be handled */ - - /* Rx buffer and str*/ - u16 *rxbuf; - u8 *rxstr; - /* Tx buffer*/ - u16 *txbuf; - - struct max3107_plat *pdata; /* Platform data */ -}; - -/* Platform data structure */ -struct max3107_plat { - /* Loopback mode enable */ - int loopback; - /* External clock enable */ - int ext_clk; - /* Called during the register initialisation */ - void (*init)(struct max3107_port *s); - /* Called when the port is found and configured */ - int (*configure)(struct max3107_port *s); - /* HW suspend function */ - void (*hw_suspend) (struct max3107_port *s, int suspend); - /* Polling mode enable */ - int polled_mode; - /* Polling period if polling mode enabled */ - int poll_time; -}; - -extern int max3107_rw(struct max3107_port *s, u8 *tx, u8 *rx, int len); -extern void max3107_hw_susp(struct max3107_port *s, int suspend); -extern int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata); -extern int max3107_remove(struct spi_device *spi); -extern int max3107_suspend(struct spi_device *spi, pm_message_t state); -extern int max3107_resume(struct spi_device *spi); - -#endif /* _LINUX_SERIAL_MAX3107_H */ diff --git a/drivers/serial/mcf.c b/drivers/serial/mcf.c deleted file mode 100644 index 3394b7cc1722..000000000000 --- a/drivers/serial/mcf.c +++ /dev/null @@ -1,662 +0,0 @@ -/****************************************************************************/ - -/* - * mcf.c -- Freescale ColdFire UART driver - * - * (C) Copyright 2003-2007, Greg Ungerer <gerg@snapgear.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -/****************************************************************************/ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/module.h> -#include <linux/console.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial.h> -#include <linux/serial_core.h> -#include <linux/io.h> -#include <asm/coldfire.h> -#include <asm/mcfsim.h> -#include <asm/mcfuart.h> -#include <asm/nettel.h> - -/****************************************************************************/ - -/* - * Some boards implement the DTR/DCD lines using GPIO lines, most - * don't. Dummy out the access macros for those that don't. Those - * that do should define these macros somewhere in there board - * specific inlude files. - */ -#if !defined(mcf_getppdcd) -#define mcf_getppdcd(p) (1) -#endif -#if !defined(mcf_getppdtr) -#define mcf_getppdtr(p) (1) -#endif -#if !defined(mcf_setppdtr) -#define mcf_setppdtr(p, v) do { } while (0) -#endif - -/****************************************************************************/ - -/* - * Local per-uart structure. - */ -struct mcf_uart { - struct uart_port port; - unsigned int sigs; /* Local copy of line sigs */ - unsigned char imr; /* Local IMR mirror */ -}; - -/****************************************************************************/ - -static unsigned int mcf_tx_empty(struct uart_port *port) -{ - return (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXEMPTY) ? - TIOCSER_TEMT : 0; -} - -/****************************************************************************/ - -static unsigned int mcf_get_mctrl(struct uart_port *port) -{ - struct mcf_uart *pp = container_of(port, struct mcf_uart, port); - unsigned int sigs; - - sigs = (readb(port->membase + MCFUART_UIPR) & MCFUART_UIPR_CTS) ? - 0 : TIOCM_CTS; - sigs |= (pp->sigs & TIOCM_RTS); - sigs |= (mcf_getppdcd(port->line) ? TIOCM_CD : 0); - sigs |= (mcf_getppdtr(port->line) ? TIOCM_DTR : 0); - - return sigs; -} - -/****************************************************************************/ - -static void mcf_set_mctrl(struct uart_port *port, unsigned int sigs) -{ - struct mcf_uart *pp = container_of(port, struct mcf_uart, port); - - pp->sigs = sigs; - mcf_setppdtr(port->line, (sigs & TIOCM_DTR)); - if (sigs & TIOCM_RTS) - writeb(MCFUART_UOP_RTS, port->membase + MCFUART_UOP1); - else - writeb(MCFUART_UOP_RTS, port->membase + MCFUART_UOP0); -} - -/****************************************************************************/ - -static void mcf_start_tx(struct uart_port *port) -{ - struct mcf_uart *pp = container_of(port, struct mcf_uart, port); - - pp->imr |= MCFUART_UIR_TXREADY; - writeb(pp->imr, port->membase + MCFUART_UIMR); -} - -/****************************************************************************/ - -static void mcf_stop_tx(struct uart_port *port) -{ - struct mcf_uart *pp = container_of(port, struct mcf_uart, port); - - pp->imr &= ~MCFUART_UIR_TXREADY; - writeb(pp->imr, port->membase + MCFUART_UIMR); -} - -/****************************************************************************/ - -static void mcf_stop_rx(struct uart_port *port) -{ - struct mcf_uart *pp = container_of(port, struct mcf_uart, port); - - pp->imr &= ~MCFUART_UIR_RXREADY; - writeb(pp->imr, port->membase + MCFUART_UIMR); -} - -/****************************************************************************/ - -static void mcf_break_ctl(struct uart_port *port, int break_state) -{ - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - if (break_state == -1) - writeb(MCFUART_UCR_CMDBREAKSTART, port->membase + MCFUART_UCR); - else - writeb(MCFUART_UCR_CMDBREAKSTOP, port->membase + MCFUART_UCR); - spin_unlock_irqrestore(&port->lock, flags); -} - -/****************************************************************************/ - -static void mcf_enable_ms(struct uart_port *port) -{ -} - -/****************************************************************************/ - -static int mcf_startup(struct uart_port *port) -{ - struct mcf_uart *pp = container_of(port, struct mcf_uart, port); - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - - /* Reset UART, get it into known state... */ - writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR); - writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR); - - /* Enable the UART transmitter and receiver */ - writeb(MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE, - port->membase + MCFUART_UCR); - - /* Enable RX interrupts now */ - pp->imr = MCFUART_UIR_RXREADY; - writeb(pp->imr, port->membase + MCFUART_UIMR); - - spin_unlock_irqrestore(&port->lock, flags); - - return 0; -} - -/****************************************************************************/ - -static void mcf_shutdown(struct uart_port *port) -{ - struct mcf_uart *pp = container_of(port, struct mcf_uart, port); - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - - /* Disable all interrupts now */ - pp->imr = 0; - writeb(pp->imr, port->membase + MCFUART_UIMR); - - /* Disable UART transmitter and receiver */ - writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR); - writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR); - - spin_unlock_irqrestore(&port->lock, flags); -} - -/****************************************************************************/ - -static void mcf_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - unsigned long flags; - unsigned int baud, baudclk; -#if defined(CONFIG_M5272) - unsigned int baudfr; -#endif - unsigned char mr1, mr2; - - baud = uart_get_baud_rate(port, termios, old, 0, 230400); -#if defined(CONFIG_M5272) - baudclk = (MCF_BUSCLK / baud) / 32; - baudfr = (((MCF_BUSCLK / baud) + 1) / 2) % 16; -#else - baudclk = ((MCF_BUSCLK / baud) + 16) / 32; -#endif - - mr1 = MCFUART_MR1_RXIRQRDY | MCFUART_MR1_RXERRCHAR; - mr2 = 0; - - switch (termios->c_cflag & CSIZE) { - case CS5: mr1 |= MCFUART_MR1_CS5; break; - case CS6: mr1 |= MCFUART_MR1_CS6; break; - case CS7: mr1 |= MCFUART_MR1_CS7; break; - case CS8: - default: mr1 |= MCFUART_MR1_CS8; break; - } - - if (termios->c_cflag & PARENB) { - if (termios->c_cflag & CMSPAR) { - if (termios->c_cflag & PARODD) - mr1 |= MCFUART_MR1_PARITYMARK; - else - mr1 |= MCFUART_MR1_PARITYSPACE; - } else { - if (termios->c_cflag & PARODD) - mr1 |= MCFUART_MR1_PARITYODD; - else - mr1 |= MCFUART_MR1_PARITYEVEN; - } - } else { - mr1 |= MCFUART_MR1_PARITYNONE; - } - - if (termios->c_cflag & CSTOPB) - mr2 |= MCFUART_MR2_STOP2; - else - mr2 |= MCFUART_MR2_STOP1; - - if (termios->c_cflag & CRTSCTS) { - mr1 |= MCFUART_MR1_RXRTS; - mr2 |= MCFUART_MR2_TXCTS; - } - - spin_lock_irqsave(&port->lock, flags); - uart_update_timeout(port, termios->c_cflag, baud); - writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR); - writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR); - writeb(MCFUART_UCR_CMDRESETMRPTR, port->membase + MCFUART_UCR); - writeb(mr1, port->membase + MCFUART_UMR); - writeb(mr2, port->membase + MCFUART_UMR); - writeb((baudclk & 0xff00) >> 8, port->membase + MCFUART_UBG1); - writeb((baudclk & 0xff), port->membase + MCFUART_UBG2); -#if defined(CONFIG_M5272) - writeb((baudfr & 0x0f), port->membase + MCFUART_UFPD); -#endif - writeb(MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER, - port->membase + MCFUART_UCSR); - writeb(MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE, - port->membase + MCFUART_UCR); - spin_unlock_irqrestore(&port->lock, flags); -} - -/****************************************************************************/ - -static void mcf_rx_chars(struct mcf_uart *pp) -{ - struct uart_port *port = &pp->port; - unsigned char status, ch, flag; - - while ((status = readb(port->membase + MCFUART_USR)) & MCFUART_USR_RXREADY) { - ch = readb(port->membase + MCFUART_URB); - flag = TTY_NORMAL; - port->icount.rx++; - - if (status & MCFUART_USR_RXERR) { - writeb(MCFUART_UCR_CMDRESETERR, - port->membase + MCFUART_UCR); - - if (status & MCFUART_USR_RXBREAK) { - port->icount.brk++; - if (uart_handle_break(port)) - continue; - } else if (status & MCFUART_USR_RXPARITY) { - port->icount.parity++; - } else if (status & MCFUART_USR_RXOVERRUN) { - port->icount.overrun++; - } else if (status & MCFUART_USR_RXFRAMING) { - port->icount.frame++; - } - - status &= port->read_status_mask; - - if (status & MCFUART_USR_RXBREAK) - flag = TTY_BREAK; - else if (status & MCFUART_USR_RXPARITY) - flag = TTY_PARITY; - else if (status & MCFUART_USR_RXFRAMING) - flag = TTY_FRAME; - } - - if (uart_handle_sysrq_char(port, ch)) - continue; - uart_insert_char(port, status, MCFUART_USR_RXOVERRUN, ch, flag); - } - - tty_flip_buffer_push(port->state->port.tty); -} - -/****************************************************************************/ - -static void mcf_tx_chars(struct mcf_uart *pp) -{ - struct uart_port *port = &pp->port; - struct circ_buf *xmit = &port->state->xmit; - - if (port->x_char) { - /* Send special char - probably flow control */ - writeb(port->x_char, port->membase + MCFUART_UTB); - port->x_char = 0; - port->icount.tx++; - return; - } - - while (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXREADY) { - if (xmit->head == xmit->tail) - break; - writeb(xmit->buf[xmit->tail], port->membase + MCFUART_UTB); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE -1); - port->icount.tx++; - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (xmit->head == xmit->tail) { - pp->imr &= ~MCFUART_UIR_TXREADY; - writeb(pp->imr, port->membase + MCFUART_UIMR); - } -} - -/****************************************************************************/ - -static irqreturn_t mcf_interrupt(int irq, void *data) -{ - struct uart_port *port = data; - struct mcf_uart *pp = container_of(port, struct mcf_uart, port); - unsigned int isr; - irqreturn_t ret = IRQ_NONE; - - isr = readb(port->membase + MCFUART_UISR) & pp->imr; - - spin_lock(&port->lock); - if (isr & MCFUART_UIR_RXREADY) { - mcf_rx_chars(pp); - ret = IRQ_HANDLED; - } - if (isr & MCFUART_UIR_TXREADY) { - mcf_tx_chars(pp); - ret = IRQ_HANDLED; - } - spin_unlock(&port->lock); - - return ret; -} - -/****************************************************************************/ - -static void mcf_config_port(struct uart_port *port, int flags) -{ - port->type = PORT_MCF; - port->fifosize = MCFUART_TXFIFOSIZE; - - /* Clear mask, so no surprise interrupts. */ - writeb(0, port->membase + MCFUART_UIMR); - - if (request_irq(port->irq, mcf_interrupt, IRQF_DISABLED, "UART", port)) - printk(KERN_ERR "MCF: unable to attach ColdFire UART %d " - "interrupt vector=%d\n", port->line, port->irq); -} - -/****************************************************************************/ - -static const char *mcf_type(struct uart_port *port) -{ - return (port->type == PORT_MCF) ? "ColdFire UART" : NULL; -} - -/****************************************************************************/ - -static int mcf_request_port(struct uart_port *port) -{ - /* UARTs always present */ - return 0; -} - -/****************************************************************************/ - -static void mcf_release_port(struct uart_port *port) -{ - /* Nothing to release... */ -} - -/****************************************************************************/ - -static int mcf_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - if ((ser->type != PORT_UNKNOWN) && (ser->type != PORT_MCF)) - return -EINVAL; - return 0; -} - -/****************************************************************************/ - -/* - * Define the basic serial functions we support. - */ -static const struct uart_ops mcf_uart_ops = { - .tx_empty = mcf_tx_empty, - .get_mctrl = mcf_get_mctrl, - .set_mctrl = mcf_set_mctrl, - .start_tx = mcf_start_tx, - .stop_tx = mcf_stop_tx, - .stop_rx = mcf_stop_rx, - .enable_ms = mcf_enable_ms, - .break_ctl = mcf_break_ctl, - .startup = mcf_startup, - .shutdown = mcf_shutdown, - .set_termios = mcf_set_termios, - .type = mcf_type, - .request_port = mcf_request_port, - .release_port = mcf_release_port, - .config_port = mcf_config_port, - .verify_port = mcf_verify_port, -}; - -static struct mcf_uart mcf_ports[4]; - -#define MCF_MAXPORTS ARRAY_SIZE(mcf_ports) - -/****************************************************************************/ -#if defined(CONFIG_SERIAL_MCF_CONSOLE) -/****************************************************************************/ - -int __init early_mcf_setup(struct mcf_platform_uart *platp) -{ - struct uart_port *port; - int i; - - for (i = 0; ((i < MCF_MAXPORTS) && (platp[i].mapbase)); i++) { - port = &mcf_ports[i].port; - - port->line = i; - port->type = PORT_MCF; - port->mapbase = platp[i].mapbase; - port->membase = (platp[i].membase) ? platp[i].membase : - (unsigned char __iomem *) port->mapbase; - port->iotype = SERIAL_IO_MEM; - port->irq = platp[i].irq; - port->uartclk = MCF_BUSCLK; - port->flags = ASYNC_BOOT_AUTOCONF; - port->ops = &mcf_uart_ops; - } - - return 0; -} - -/****************************************************************************/ - -static void mcf_console_putc(struct console *co, const char c) -{ - struct uart_port *port = &(mcf_ports + co->index)->port; - int i; - - for (i = 0; (i < 0x10000); i++) { - if (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXREADY) - break; - } - writeb(c, port->membase + MCFUART_UTB); - for (i = 0; (i < 0x10000); i++) { - if (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXREADY) - break; - } -} - -/****************************************************************************/ - -static void mcf_console_write(struct console *co, const char *s, unsigned int count) -{ - for (; (count); count--, s++) { - mcf_console_putc(co, *s); - if (*s == '\n') - mcf_console_putc(co, '\r'); - } -} - -/****************************************************************************/ - -static int __init mcf_console_setup(struct console *co, char *options) -{ - struct uart_port *port; - int baud = CONFIG_SERIAL_MCF_BAUDRATE; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - if ((co->index < 0) || (co->index >= MCF_MAXPORTS)) - co->index = 0; - port = &mcf_ports[co->index].port; - if (port->membase == 0) - return -ENODEV; - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - -/****************************************************************************/ - -static struct uart_driver mcf_driver; - -static struct console mcf_console = { - .name = "ttyS", - .write = mcf_console_write, - .device = uart_console_device, - .setup = mcf_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &mcf_driver, -}; - -static int __init mcf_console_init(void) -{ - register_console(&mcf_console); - return 0; -} - -console_initcall(mcf_console_init); - -#define MCF_CONSOLE &mcf_console - -/****************************************************************************/ -#else -/****************************************************************************/ - -#define MCF_CONSOLE NULL - -/****************************************************************************/ -#endif /* CONFIG_MCF_CONSOLE */ -/****************************************************************************/ - -/* - * Define the mcf UART driver structure. - */ -static struct uart_driver mcf_driver = { - .owner = THIS_MODULE, - .driver_name = "mcf", - .dev_name = "ttyS", - .major = TTY_MAJOR, - .minor = 64, - .nr = MCF_MAXPORTS, - .cons = MCF_CONSOLE, -}; - -/****************************************************************************/ - -static int __devinit mcf_probe(struct platform_device *pdev) -{ - struct mcf_platform_uart *platp = pdev->dev.platform_data; - struct uart_port *port; - int i; - - for (i = 0; ((i < MCF_MAXPORTS) && (platp[i].mapbase)); i++) { - port = &mcf_ports[i].port; - - port->line = i; - port->type = PORT_MCF; - port->mapbase = platp[i].mapbase; - port->membase = (platp[i].membase) ? platp[i].membase : - (unsigned char __iomem *) platp[i].mapbase; - port->iotype = SERIAL_IO_MEM; - port->irq = platp[i].irq; - port->uartclk = MCF_BUSCLK; - port->ops = &mcf_uart_ops; - port->flags = ASYNC_BOOT_AUTOCONF; - - uart_add_one_port(&mcf_driver, port); - } - - return 0; -} - -/****************************************************************************/ - -static int __devexit mcf_remove(struct platform_device *pdev) -{ - struct uart_port *port; - int i; - - for (i = 0; (i < MCF_MAXPORTS); i++) { - port = &mcf_ports[i].port; - if (port) - uart_remove_one_port(&mcf_driver, port); - } - - return 0; -} - -/****************************************************************************/ - -static struct platform_driver mcf_platform_driver = { - .probe = mcf_probe, - .remove = __devexit_p(mcf_remove), - .driver = { - .name = "mcfuart", - .owner = THIS_MODULE, - }, -}; - -/****************************************************************************/ - -static int __init mcf_init(void) -{ - int rc; - - printk("ColdFire internal UART serial driver\n"); - - rc = uart_register_driver(&mcf_driver); - if (rc) - return rc; - rc = platform_driver_register(&mcf_platform_driver); - if (rc) - return rc; - return 0; -} - -/****************************************************************************/ - -static void __exit mcf_exit(void) -{ - platform_driver_unregister(&mcf_platform_driver); - uart_unregister_driver(&mcf_driver); -} - -/****************************************************************************/ - -module_init(mcf_init); -module_exit(mcf_exit); - -MODULE_AUTHOR("Greg Ungerer <gerg@snapgear.com>"); -MODULE_DESCRIPTION("Freescale ColdFire UART driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:mcfuart"); - -/****************************************************************************/ diff --git a/drivers/serial/mfd.c b/drivers/serial/mfd.c deleted file mode 100644 index d40010a22ecd..000000000000 --- a/drivers/serial/mfd.c +++ /dev/null @@ -1,1513 +0,0 @@ -/* - * mfd.c: driver for High Speed UART device of Intel Medfield platform - * - * Refer pxa.c, 8250.c and some other drivers in drivers/serial/ - * - * (C) Copyright 2010 Intel Corporation - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; version 2 - * of the License. - */ - -/* Notes: - * 1. DMA channel allocation: 0/1 channel are assigned to port 0, - * 2/3 chan to port 1, 4/5 chan to port 3. Even number chans - * are used for RX, odd chans for TX - * - * 2. In A0 stepping, UART will not support TX half empty flag - * - * 3. The RI/DSR/DCD/DTR are not pinned out, DCD & DSR are always - * asserted, only when the HW is reset the DDCD and DDSR will - * be triggered - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/slab.h> -#include <linux/serial_reg.h> -#include <linux/circ_buf.h> -#include <linux/delay.h> -#include <linux/interrupt.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/serial_mfd.h> -#include <linux/dma-mapping.h> -#include <linux/pci.h> -#include <linux/io.h> -#include <linux/debugfs.h> - -#define MFD_HSU_A0_STEPPING 1 - -#define HSU_DMA_BUF_SIZE 2048 - -#define chan_readl(chan, offset) readl(chan->reg + offset) -#define chan_writel(chan, offset, val) writel(val, chan->reg + offset) - -#define mfd_readl(obj, offset) readl(obj->reg + offset) -#define mfd_writel(obj, offset, val) writel(val, obj->reg + offset) - -#define HSU_DMA_TIMEOUT_CHECK_FREQ (HZ/10) - -struct hsu_dma_buffer { - u8 *buf; - dma_addr_t dma_addr; - u32 dma_size; - u32 ofs; -}; - -struct hsu_dma_chan { - u32 id; - enum dma_data_direction dirt; - struct uart_hsu_port *uport; - void __iomem *reg; - struct timer_list rx_timer; /* only needed by RX channel */ -}; - -struct uart_hsu_port { - struct uart_port port; - unsigned char ier; - unsigned char lcr; - unsigned char mcr; - unsigned int lsr_break_flag; - char name[12]; - int index; - struct device *dev; - - struct hsu_dma_chan *txc; - struct hsu_dma_chan *rxc; - struct hsu_dma_buffer txbuf; - struct hsu_dma_buffer rxbuf; - int use_dma; /* flag for DMA/PIO */ - int running; - int dma_tx_on; -}; - -/* Top level data structure of HSU */ -struct hsu_port { - void __iomem *reg; - unsigned long paddr; - unsigned long iolen; - u32 irq; - - struct uart_hsu_port port[3]; - struct hsu_dma_chan chans[10]; - - struct dentry *debugfs; -}; - -static inline unsigned int serial_in(struct uart_hsu_port *up, int offset) -{ - unsigned int val; - - if (offset > UART_MSR) { - offset <<= 2; - val = readl(up->port.membase + offset); - } else - val = (unsigned int)readb(up->port.membase + offset); - - return val; -} - -static inline void serial_out(struct uart_hsu_port *up, int offset, int value) -{ - if (offset > UART_MSR) { - offset <<= 2; - writel(value, up->port.membase + offset); - } else { - unsigned char val = value & 0xff; - writeb(val, up->port.membase + offset); - } -} - -#ifdef CONFIG_DEBUG_FS - -#define HSU_REGS_BUFSIZE 1024 - -static int hsu_show_regs_open(struct inode *inode, struct file *file) -{ - file->private_data = inode->i_private; - return 0; -} - -static ssize_t port_show_regs(struct file *file, char __user *user_buf, - size_t count, loff_t *ppos) -{ - struct uart_hsu_port *up = file->private_data; - char *buf; - u32 len = 0; - ssize_t ret; - - buf = kzalloc(HSU_REGS_BUFSIZE, GFP_KERNEL); - if (!buf) - return 0; - - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "MFD HSU port[%d] regs:\n", up->index); - - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "=================================\n"); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "IER: \t\t0x%08x\n", serial_in(up, UART_IER)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "IIR: \t\t0x%08x\n", serial_in(up, UART_IIR)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "LCR: \t\t0x%08x\n", serial_in(up, UART_LCR)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "MCR: \t\t0x%08x\n", serial_in(up, UART_MCR)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "LSR: \t\t0x%08x\n", serial_in(up, UART_LSR)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "MSR: \t\t0x%08x\n", serial_in(up, UART_MSR)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "FOR: \t\t0x%08x\n", serial_in(up, UART_FOR)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "PS: \t\t0x%08x\n", serial_in(up, UART_PS)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "MUL: \t\t0x%08x\n", serial_in(up, UART_MUL)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "DIV: \t\t0x%08x\n", serial_in(up, UART_DIV)); - - if (len > HSU_REGS_BUFSIZE) - len = HSU_REGS_BUFSIZE; - - ret = simple_read_from_buffer(user_buf, count, ppos, buf, len); - kfree(buf); - return ret; -} - -static ssize_t dma_show_regs(struct file *file, char __user *user_buf, - size_t count, loff_t *ppos) -{ - struct hsu_dma_chan *chan = file->private_data; - char *buf; - u32 len = 0; - ssize_t ret; - - buf = kzalloc(HSU_REGS_BUFSIZE, GFP_KERNEL); - if (!buf) - return 0; - - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "MFD HSU DMA channel [%d] regs:\n", chan->id); - - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "=================================\n"); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "CR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_CR)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "DCR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_DCR)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "BSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_BSR)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "MOTSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_MOTSR)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "D0SAR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D0SAR)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "D0TSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D0TSR)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "D0SAR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D1SAR)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "D0TSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D1TSR)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "D0SAR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D2SAR)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "D0TSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D2TSR)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "D0SAR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D3SAR)); - len += snprintf(buf + len, HSU_REGS_BUFSIZE - len, - "D0TSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D3TSR)); - - if (len > HSU_REGS_BUFSIZE) - len = HSU_REGS_BUFSIZE; - - ret = simple_read_from_buffer(user_buf, count, ppos, buf, len); - kfree(buf); - return ret; -} - -static const struct file_operations port_regs_ops = { - .owner = THIS_MODULE, - .open = hsu_show_regs_open, - .read = port_show_regs, - .llseek = default_llseek, -}; - -static const struct file_operations dma_regs_ops = { - .owner = THIS_MODULE, - .open = hsu_show_regs_open, - .read = dma_show_regs, - .llseek = default_llseek, -}; - -static int hsu_debugfs_init(struct hsu_port *hsu) -{ - int i; - char name[32]; - - hsu->debugfs = debugfs_create_dir("hsu", NULL); - if (!hsu->debugfs) - return -ENOMEM; - - for (i = 0; i < 3; i++) { - snprintf(name, sizeof(name), "port_%d_regs", i); - debugfs_create_file(name, S_IFREG | S_IRUGO, - hsu->debugfs, (void *)(&hsu->port[i]), &port_regs_ops); - } - - for (i = 0; i < 6; i++) { - snprintf(name, sizeof(name), "dma_chan_%d_regs", i); - debugfs_create_file(name, S_IFREG | S_IRUGO, - hsu->debugfs, (void *)&hsu->chans[i], &dma_regs_ops); - } - - return 0; -} - -static void hsu_debugfs_remove(struct hsu_port *hsu) -{ - if (hsu->debugfs) - debugfs_remove_recursive(hsu->debugfs); -} - -#else -static inline int hsu_debugfs_init(struct hsu_port *hsu) -{ - return 0; -} - -static inline void hsu_debugfs_remove(struct hsu_port *hsu) -{ -} -#endif /* CONFIG_DEBUG_FS */ - -static void serial_hsu_enable_ms(struct uart_port *port) -{ - struct uart_hsu_port *up = - container_of(port, struct uart_hsu_port, port); - - up->ier |= UART_IER_MSI; - serial_out(up, UART_IER, up->ier); -} - -void hsu_dma_tx(struct uart_hsu_port *up) -{ - struct circ_buf *xmit = &up->port.state->xmit; - struct hsu_dma_buffer *dbuf = &up->txbuf; - int count; - - /* test_and_set_bit may be better, but anyway it's in lock protected mode */ - if (up->dma_tx_on) - return; - - /* Update the circ buf info */ - xmit->tail += dbuf->ofs; - xmit->tail &= UART_XMIT_SIZE - 1; - - up->port.icount.tx += dbuf->ofs; - dbuf->ofs = 0; - - /* Disable the channel */ - chan_writel(up->txc, HSU_CH_CR, 0x0); - - if (!uart_circ_empty(xmit) && !uart_tx_stopped(&up->port)) { - dma_sync_single_for_device(up->port.dev, - dbuf->dma_addr, - dbuf->dma_size, - DMA_TO_DEVICE); - - count = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE); - dbuf->ofs = count; - - /* Reprogram the channel */ - chan_writel(up->txc, HSU_CH_D0SAR, dbuf->dma_addr + xmit->tail); - chan_writel(up->txc, HSU_CH_D0TSR, count); - - /* Reenable the channel */ - chan_writel(up->txc, HSU_CH_DCR, 0x1 - | (0x1 << 8) - | (0x1 << 16) - | (0x1 << 24)); - up->dma_tx_on = 1; - chan_writel(up->txc, HSU_CH_CR, 0x1); - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&up->port); -} - -/* The buffer is already cache coherent */ -void hsu_dma_start_rx_chan(struct hsu_dma_chan *rxc, struct hsu_dma_buffer *dbuf) -{ - dbuf->ofs = 0; - - chan_writel(rxc, HSU_CH_BSR, 32); - chan_writel(rxc, HSU_CH_MOTSR, 4); - - chan_writel(rxc, HSU_CH_D0SAR, dbuf->dma_addr); - chan_writel(rxc, HSU_CH_D0TSR, dbuf->dma_size); - chan_writel(rxc, HSU_CH_DCR, 0x1 | (0x1 << 8) - | (0x1 << 16) - | (0x1 << 24) /* timeout bit, see HSU Errata 1 */ - ); - chan_writel(rxc, HSU_CH_CR, 0x3); - - mod_timer(&rxc->rx_timer, jiffies + HSU_DMA_TIMEOUT_CHECK_FREQ); -} - -/* Protected by spin_lock_irqsave(port->lock) */ -static void serial_hsu_start_tx(struct uart_port *port) -{ - struct uart_hsu_port *up = - container_of(port, struct uart_hsu_port, port); - - if (up->use_dma) { - hsu_dma_tx(up); - } else if (!(up->ier & UART_IER_THRI)) { - up->ier |= UART_IER_THRI; - serial_out(up, UART_IER, up->ier); - } -} - -static void serial_hsu_stop_tx(struct uart_port *port) -{ - struct uart_hsu_port *up = - container_of(port, struct uart_hsu_port, port); - struct hsu_dma_chan *txc = up->txc; - - if (up->use_dma) - chan_writel(txc, HSU_CH_CR, 0x0); - else if (up->ier & UART_IER_THRI) { - up->ier &= ~UART_IER_THRI; - serial_out(up, UART_IER, up->ier); - } -} - -/* This is always called in spinlock protected mode, so - * modify timeout timer is safe here */ -void hsu_dma_rx(struct uart_hsu_port *up, u32 int_sts) -{ - struct hsu_dma_buffer *dbuf = &up->rxbuf; - struct hsu_dma_chan *chan = up->rxc; - struct uart_port *port = &up->port; - struct tty_struct *tty = port->state->port.tty; - int count; - - if (!tty) - return; - - /* - * First need to know how many is already transferred, - * then check if its a timeout DMA irq, and return - * the trail bytes out, push them up and reenable the - * channel - */ - - /* Timeout IRQ, need wait some time, see Errata 2 */ - if (int_sts & 0xf00) - udelay(2); - - /* Stop the channel */ - chan_writel(chan, HSU_CH_CR, 0x0); - - count = chan_readl(chan, HSU_CH_D0SAR) - dbuf->dma_addr; - if (!count) { - /* Restart the channel before we leave */ - chan_writel(chan, HSU_CH_CR, 0x3); - return; - } - del_timer(&chan->rx_timer); - - dma_sync_single_for_cpu(port->dev, dbuf->dma_addr, - dbuf->dma_size, DMA_FROM_DEVICE); - - /* - * Head will only wrap around when we recycle - * the DMA buffer, and when that happens, we - * explicitly set tail to 0. So head will - * always be greater than tail. - */ - tty_insert_flip_string(tty, dbuf->buf, count); - port->icount.rx += count; - - dma_sync_single_for_device(up->port.dev, dbuf->dma_addr, - dbuf->dma_size, DMA_FROM_DEVICE); - - /* Reprogram the channel */ - chan_writel(chan, HSU_CH_D0SAR, dbuf->dma_addr); - chan_writel(chan, HSU_CH_D0TSR, dbuf->dma_size); - chan_writel(chan, HSU_CH_DCR, 0x1 - | (0x1 << 8) - | (0x1 << 16) - | (0x1 << 24) /* timeout bit, see HSU Errata 1 */ - ); - tty_flip_buffer_push(tty); - - chan_writel(chan, HSU_CH_CR, 0x3); - chan->rx_timer.expires = jiffies + HSU_DMA_TIMEOUT_CHECK_FREQ; - add_timer(&chan->rx_timer); - -} - -static void serial_hsu_stop_rx(struct uart_port *port) -{ - struct uart_hsu_port *up = - container_of(port, struct uart_hsu_port, port); - struct hsu_dma_chan *chan = up->rxc; - - if (up->use_dma) - chan_writel(chan, HSU_CH_CR, 0x2); - else { - up->ier &= ~UART_IER_RLSI; - up->port.read_status_mask &= ~UART_LSR_DR; - serial_out(up, UART_IER, up->ier); - } -} - -static inline void receive_chars(struct uart_hsu_port *up, int *status) -{ - struct tty_struct *tty = up->port.state->port.tty; - unsigned int ch, flag; - unsigned int max_count = 256; - - if (!tty) - return; - - do { - ch = serial_in(up, UART_RX); - flag = TTY_NORMAL; - up->port.icount.rx++; - - if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE | - UART_LSR_FE | UART_LSR_OE))) { - - dev_warn(up->dev, "We really rush into ERR/BI case" - "status = 0x%02x", *status); - /* For statistics only */ - if (*status & UART_LSR_BI) { - *status &= ~(UART_LSR_FE | UART_LSR_PE); - up->port.icount.brk++; - /* - * We do the SysRQ and SAK checking - * here because otherwise the break - * may get masked by ignore_status_mask - * or read_status_mask. - */ - if (uart_handle_break(&up->port)) - goto ignore_char; - } else if (*status & UART_LSR_PE) - up->port.icount.parity++; - else if (*status & UART_LSR_FE) - up->port.icount.frame++; - if (*status & UART_LSR_OE) - up->port.icount.overrun++; - - /* Mask off conditions which should be ignored. */ - *status &= up->port.read_status_mask; - -#ifdef CONFIG_SERIAL_MFD_HSU_CONSOLE - if (up->port.cons && - up->port.cons->index == up->port.line) { - /* Recover the break flag from console xmit */ - *status |= up->lsr_break_flag; - up->lsr_break_flag = 0; - } -#endif - if (*status & UART_LSR_BI) { - flag = TTY_BREAK; - } else if (*status & UART_LSR_PE) - flag = TTY_PARITY; - else if (*status & UART_LSR_FE) - flag = TTY_FRAME; - } - - if (uart_handle_sysrq_char(&up->port, ch)) - goto ignore_char; - - uart_insert_char(&up->port, *status, UART_LSR_OE, ch, flag); - ignore_char: - *status = serial_in(up, UART_LSR); - } while ((*status & UART_LSR_DR) && max_count--); - tty_flip_buffer_push(tty); -} - -static void transmit_chars(struct uart_hsu_port *up) -{ - struct circ_buf *xmit = &up->port.state->xmit; - int count; - - if (up->port.x_char) { - serial_out(up, UART_TX, up->port.x_char); - up->port.icount.tx++; - up->port.x_char = 0; - return; - } - if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) { - serial_hsu_stop_tx(&up->port); - return; - } - -#ifndef MFD_HSU_A0_STEPPING - count = up->port.fifosize / 2; -#else - /* - * A0 only supports fully empty IRQ, and the first char written - * into it won't clear the EMPT bit, so we may need be cautious - * by useing a shorter buffer - */ - count = up->port.fifosize - 4; -#endif - do { - serial_out(up, UART_TX, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - - up->port.icount.tx++; - if (uart_circ_empty(xmit)) - break; - } while (--count > 0); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&up->port); - - if (uart_circ_empty(xmit)) - serial_hsu_stop_tx(&up->port); -} - -static inline void check_modem_status(struct uart_hsu_port *up) -{ - int status; - - status = serial_in(up, UART_MSR); - - if ((status & UART_MSR_ANY_DELTA) == 0) - return; - - if (status & UART_MSR_TERI) - up->port.icount.rng++; - if (status & UART_MSR_DDSR) - up->port.icount.dsr++; - /* We may only get DDCD when HW init and reset */ - if (status & UART_MSR_DDCD) - uart_handle_dcd_change(&up->port, status & UART_MSR_DCD); - /* Will start/stop_tx accordingly */ - if (status & UART_MSR_DCTS) - uart_handle_cts_change(&up->port, status & UART_MSR_CTS); - - wake_up_interruptible(&up->port.state->port.delta_msr_wait); -} - -/* - * This handles the interrupt from one port. - */ -static irqreturn_t port_irq(int irq, void *dev_id) -{ - struct uart_hsu_port *up = dev_id; - unsigned int iir, lsr; - unsigned long flags; - - if (unlikely(!up->running)) - return IRQ_NONE; - - spin_lock_irqsave(&up->port.lock, flags); - if (up->use_dma) { - lsr = serial_in(up, UART_LSR); - if (unlikely(lsr & (UART_LSR_BI | UART_LSR_PE | - UART_LSR_FE | UART_LSR_OE))) - dev_warn(up->dev, - "Got lsr irq while using DMA, lsr = 0x%2x\n", - lsr); - check_modem_status(up); - spin_unlock_irqrestore(&up->port.lock, flags); - return IRQ_HANDLED; - } - - iir = serial_in(up, UART_IIR); - if (iir & UART_IIR_NO_INT) { - spin_unlock_irqrestore(&up->port.lock, flags); - return IRQ_NONE; - } - - lsr = serial_in(up, UART_LSR); - if (lsr & UART_LSR_DR) - receive_chars(up, &lsr); - check_modem_status(up); - - /* lsr will be renewed during the receive_chars */ - if (lsr & UART_LSR_THRE) - transmit_chars(up); - - spin_unlock_irqrestore(&up->port.lock, flags); - return IRQ_HANDLED; -} - -static inline void dma_chan_irq(struct hsu_dma_chan *chan) -{ - struct uart_hsu_port *up = chan->uport; - unsigned long flags; - u32 int_sts; - - spin_lock_irqsave(&up->port.lock, flags); - - if (!up->use_dma || !up->running) - goto exit; - - /* - * No matter what situation, need read clear the IRQ status - * There is a bug, see Errata 5, HSD 2900918 - */ - int_sts = chan_readl(chan, HSU_CH_SR); - - /* Rx channel */ - if (chan->dirt == DMA_FROM_DEVICE) - hsu_dma_rx(up, int_sts); - - /* Tx channel */ - if (chan->dirt == DMA_TO_DEVICE) { - chan_writel(chan, HSU_CH_CR, 0x0); - up->dma_tx_on = 0; - hsu_dma_tx(up); - } - -exit: - spin_unlock_irqrestore(&up->port.lock, flags); - return; -} - -static irqreturn_t dma_irq(int irq, void *dev_id) -{ - struct hsu_port *hsu = dev_id; - u32 int_sts, i; - - int_sts = mfd_readl(hsu, HSU_GBL_DMAISR); - - /* Currently we only have 6 channels may be used */ - for (i = 0; i < 6; i++) { - if (int_sts & 0x1) - dma_chan_irq(&hsu->chans[i]); - int_sts >>= 1; - } - - return IRQ_HANDLED; -} - -static unsigned int serial_hsu_tx_empty(struct uart_port *port) -{ - struct uart_hsu_port *up = - container_of(port, struct uart_hsu_port, port); - unsigned long flags; - unsigned int ret; - - spin_lock_irqsave(&up->port.lock, flags); - ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0; - spin_unlock_irqrestore(&up->port.lock, flags); - - return ret; -} - -static unsigned int serial_hsu_get_mctrl(struct uart_port *port) -{ - struct uart_hsu_port *up = - container_of(port, struct uart_hsu_port, port); - unsigned char status; - unsigned int ret; - - status = serial_in(up, UART_MSR); - - ret = 0; - if (status & UART_MSR_DCD) - ret |= TIOCM_CAR; - if (status & UART_MSR_RI) - ret |= TIOCM_RNG; - if (status & UART_MSR_DSR) - ret |= TIOCM_DSR; - if (status & UART_MSR_CTS) - ret |= TIOCM_CTS; - return ret; -} - -static void serial_hsu_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct uart_hsu_port *up = - container_of(port, struct uart_hsu_port, port); - unsigned char mcr = 0; - - if (mctrl & TIOCM_RTS) - mcr |= UART_MCR_RTS; - if (mctrl & TIOCM_DTR) - mcr |= UART_MCR_DTR; - if (mctrl & TIOCM_OUT1) - mcr |= UART_MCR_OUT1; - if (mctrl & TIOCM_OUT2) - mcr |= UART_MCR_OUT2; - if (mctrl & TIOCM_LOOP) - mcr |= UART_MCR_LOOP; - - mcr |= up->mcr; - - serial_out(up, UART_MCR, mcr); -} - -static void serial_hsu_break_ctl(struct uart_port *port, int break_state) -{ - struct uart_hsu_port *up = - container_of(port, struct uart_hsu_port, port); - unsigned long flags; - - spin_lock_irqsave(&up->port.lock, flags); - if (break_state == -1) - up->lcr |= UART_LCR_SBC; - else - up->lcr &= ~UART_LCR_SBC; - serial_out(up, UART_LCR, up->lcr); - spin_unlock_irqrestore(&up->port.lock, flags); -} - -/* - * What special to do: - * 1. chose the 64B fifo mode - * 2. make sure not to select half empty mode for A0 stepping - * 3. start dma or pio depends on configuration - * 4. we only allocate dma memory when needed - */ -static int serial_hsu_startup(struct uart_port *port) -{ - struct uart_hsu_port *up = - container_of(port, struct uart_hsu_port, port); - unsigned long flags; - - /* - * Clear the FIFO buffers and disable them. - * (they will be reenabled in set_termios()) - */ - serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); - serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | - UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); - serial_out(up, UART_FCR, 0); - - /* Clear the interrupt registers. */ - (void) serial_in(up, UART_LSR); - (void) serial_in(up, UART_RX); - (void) serial_in(up, UART_IIR); - (void) serial_in(up, UART_MSR); - - /* Now, initialize the UART, default is 8n1 */ - serial_out(up, UART_LCR, UART_LCR_WLEN8); - - spin_lock_irqsave(&up->port.lock, flags); - - up->port.mctrl |= TIOCM_OUT2; - serial_hsu_set_mctrl(&up->port, up->port.mctrl); - - /* - * Finally, enable interrupts. Note: Modem status interrupts - * are set via set_termios(), which will be occurring imminently - * anyway, so we don't enable them here. - */ - if (!up->use_dma) - up->ier = UART_IER_RLSI | UART_IER_RDI | UART_IER_RTOIE; - else - up->ier = 0; - serial_out(up, UART_IER, up->ier); - - spin_unlock_irqrestore(&up->port.lock, flags); - - /* DMA init */ - if (up->use_dma) { - struct hsu_dma_buffer *dbuf; - struct circ_buf *xmit = &port->state->xmit; - - up->dma_tx_on = 0; - - /* First allocate the RX buffer */ - dbuf = &up->rxbuf; - dbuf->buf = kzalloc(HSU_DMA_BUF_SIZE, GFP_KERNEL); - if (!dbuf->buf) { - up->use_dma = 0; - goto exit; - } - dbuf->dma_addr = dma_map_single(port->dev, - dbuf->buf, - HSU_DMA_BUF_SIZE, - DMA_FROM_DEVICE); - dbuf->dma_size = HSU_DMA_BUF_SIZE; - - /* Start the RX channel right now */ - hsu_dma_start_rx_chan(up->rxc, dbuf); - - /* Next init the TX DMA */ - dbuf = &up->txbuf; - dbuf->buf = xmit->buf; - dbuf->dma_addr = dma_map_single(port->dev, - dbuf->buf, - UART_XMIT_SIZE, - DMA_TO_DEVICE); - dbuf->dma_size = UART_XMIT_SIZE; - - /* This should not be changed all around */ - chan_writel(up->txc, HSU_CH_BSR, 32); - chan_writel(up->txc, HSU_CH_MOTSR, 4); - dbuf->ofs = 0; - } - -exit: - /* And clear the interrupt registers again for luck. */ - (void) serial_in(up, UART_LSR); - (void) serial_in(up, UART_RX); - (void) serial_in(up, UART_IIR); - (void) serial_in(up, UART_MSR); - - up->running = 1; - return 0; -} - -static void serial_hsu_shutdown(struct uart_port *port) -{ - struct uart_hsu_port *up = - container_of(port, struct uart_hsu_port, port); - unsigned long flags; - - del_timer_sync(&up->rxc->rx_timer); - - /* Disable interrupts from this port */ - up->ier = 0; - serial_out(up, UART_IER, 0); - up->running = 0; - - spin_lock_irqsave(&up->port.lock, flags); - up->port.mctrl &= ~TIOCM_OUT2; - serial_hsu_set_mctrl(&up->port, up->port.mctrl); - spin_unlock_irqrestore(&up->port.lock, flags); - - /* Disable break condition and FIFOs */ - serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC); - serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | - UART_FCR_CLEAR_RCVR | - UART_FCR_CLEAR_XMIT); - serial_out(up, UART_FCR, 0); -} - -static void -serial_hsu_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct uart_hsu_port *up = - container_of(port, struct uart_hsu_port, port); - struct tty_struct *tty = port->state->port.tty; - unsigned char cval, fcr = 0; - unsigned long flags; - unsigned int baud, quot; - u32 ps, mul; - - switch (termios->c_cflag & CSIZE) { - case CS5: - cval = UART_LCR_WLEN5; - break; - case CS6: - cval = UART_LCR_WLEN6; - break; - case CS7: - cval = UART_LCR_WLEN7; - break; - default: - case CS8: - cval = UART_LCR_WLEN8; - break; - } - - /* CMSPAR isn't supported by this driver */ - if (tty) - tty->termios->c_cflag &= ~CMSPAR; - - if (termios->c_cflag & CSTOPB) - cval |= UART_LCR_STOP; - if (termios->c_cflag & PARENB) - cval |= UART_LCR_PARITY; - if (!(termios->c_cflag & PARODD)) - cval |= UART_LCR_EPAR; - - /* - * The base clk is 50Mhz, and the baud rate come from: - * baud = 50M * MUL / (DIV * PS * DLAB) - * - * For those basic low baud rate we can get the direct - * scalar from 2746800, like 115200 = 2746800/24. For those - * higher baud rate, we handle them case by case, mainly by - * adjusting the MUL/PS registers, and DIV register is kept - * as default value 0x3d09 to make things simple - */ - baud = uart_get_baud_rate(port, termios, old, 0, 4000000); - - quot = 1; - ps = 0x10; - mul = 0x3600; - switch (baud) { - case 3500000: - mul = 0x3345; - ps = 0xC; - break; - case 1843200: - mul = 0x2400; - break; - case 3000000: - case 2500000: - case 2000000: - case 1500000: - case 1000000: - case 500000: - /* mul/ps/quot = 0x9C4/0x10/0x1 will make a 500000 bps */ - mul = baud / 500000 * 0x9C4; - break; - default: - /* Use uart_get_divisor to get quot for other baud rates */ - quot = 0; - } - - if (!quot) - quot = uart_get_divisor(port, baud); - - if ((up->port.uartclk / quot) < (2400 * 16)) - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_HSU_64_1B; - else if ((up->port.uartclk / quot) < (230400 * 16)) - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_HSU_64_16B; - else - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_HSU_64_32B; - - fcr |= UART_FCR_HSU_64B_FIFO; -#ifdef MFD_HSU_A0_STEPPING - /* A0 doesn't support half empty IRQ */ - fcr |= UART_FCR_FULL_EMPT_TXI; -#endif - - /* - * Ok, we're now changing the port state. Do it with - * interrupts disabled. - */ - spin_lock_irqsave(&up->port.lock, flags); - - /* Update the per-port timeout */ - uart_update_timeout(port, termios->c_cflag, baud); - - up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; - if (termios->c_iflag & INPCK) - up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; - if (termios->c_iflag & (BRKINT | PARMRK)) - up->port.read_status_mask |= UART_LSR_BI; - - /* Characters to ignore */ - up->port.ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; - if (termios->c_iflag & IGNBRK) { - up->port.ignore_status_mask |= UART_LSR_BI; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - up->port.ignore_status_mask |= UART_LSR_OE; - } - - /* Ignore all characters if CREAD is not set */ - if ((termios->c_cflag & CREAD) == 0) - up->port.ignore_status_mask |= UART_LSR_DR; - - /* - * CTS flow control flag and modem status interrupts, disable - * MSI by default - */ - up->ier &= ~UART_IER_MSI; - if (UART_ENABLE_MS(&up->port, termios->c_cflag)) - up->ier |= UART_IER_MSI; - - serial_out(up, UART_IER, up->ier); - - if (termios->c_cflag & CRTSCTS) - up->mcr |= UART_MCR_AFE | UART_MCR_RTS; - else - up->mcr &= ~UART_MCR_AFE; - - serial_out(up, UART_LCR, cval | UART_LCR_DLAB); /* set DLAB */ - serial_out(up, UART_DLL, quot & 0xff); /* LS of divisor */ - serial_out(up, UART_DLM, quot >> 8); /* MS of divisor */ - serial_out(up, UART_LCR, cval); /* reset DLAB */ - serial_out(up, UART_MUL, mul); /* set MUL */ - serial_out(up, UART_PS, ps); /* set PS */ - up->lcr = cval; /* Save LCR */ - serial_hsu_set_mctrl(&up->port, up->port.mctrl); - serial_out(up, UART_FCR, fcr); - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static void -serial_hsu_pm(struct uart_port *port, unsigned int state, - unsigned int oldstate) -{ -} - -static void serial_hsu_release_port(struct uart_port *port) -{ -} - -static int serial_hsu_request_port(struct uart_port *port) -{ - return 0; -} - -static void serial_hsu_config_port(struct uart_port *port, int flags) -{ - struct uart_hsu_port *up = - container_of(port, struct uart_hsu_port, port); - up->port.type = PORT_MFD; -} - -static int -serial_hsu_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - /* We don't want the core code to modify any port params */ - return -EINVAL; -} - -static const char * -serial_hsu_type(struct uart_port *port) -{ - struct uart_hsu_port *up = - container_of(port, struct uart_hsu_port, port); - return up->name; -} - -/* Mainly for uart console use */ -static struct uart_hsu_port *serial_hsu_ports[3]; -static struct uart_driver serial_hsu_reg; - -#ifdef CONFIG_SERIAL_MFD_HSU_CONSOLE - -#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - -/* Wait for transmitter & holding register to empty */ -static inline void wait_for_xmitr(struct uart_hsu_port *up) -{ - unsigned int status, tmout = 1000; - - /* Wait up to 1ms for the character to be sent. */ - do { - status = serial_in(up, UART_LSR); - - if (status & UART_LSR_BI) - up->lsr_break_flag = UART_LSR_BI; - - if (--tmout == 0) - break; - udelay(1); - } while (!(status & BOTH_EMPTY)); - - /* Wait up to 1s for flow control if necessary */ - if (up->port.flags & UPF_CONS_FLOW) { - tmout = 1000000; - while (--tmout && - ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0)) - udelay(1); - } -} - -static void serial_hsu_console_putchar(struct uart_port *port, int ch) -{ - struct uart_hsu_port *up = - container_of(port, struct uart_hsu_port, port); - - wait_for_xmitr(up); - serial_out(up, UART_TX, ch); -} - -/* - * Print a string to the serial port trying not to disturb - * any possible real use of the port... - * - * The console_lock must be held when we get here. - */ -static void -serial_hsu_console_write(struct console *co, const char *s, unsigned int count) -{ - struct uart_hsu_port *up = serial_hsu_ports[co->index]; - unsigned long flags; - unsigned int ier; - int locked = 1; - - local_irq_save(flags); - if (up->port.sysrq) - locked = 0; - else if (oops_in_progress) { - locked = spin_trylock(&up->port.lock); - } else - spin_lock(&up->port.lock); - - /* First save the IER then disable the interrupts */ - ier = serial_in(up, UART_IER); - serial_out(up, UART_IER, 0); - - uart_console_write(&up->port, s, count, serial_hsu_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore the IER - */ - wait_for_xmitr(up); - serial_out(up, UART_IER, ier); - - if (locked) - spin_unlock(&up->port.lock); - local_irq_restore(flags); -} - -static struct console serial_hsu_console; - -static int __init -serial_hsu_console_setup(struct console *co, char *options) -{ - struct uart_hsu_port *up; - int baud = 115200; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - int ret; - - if (co->index == -1 || co->index >= serial_hsu_reg.nr) - co->index = 0; - up = serial_hsu_ports[co->index]; - if (!up) - return -ENODEV; - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - ret = uart_set_options(&up->port, co, baud, parity, bits, flow); - - return ret; -} - -static struct console serial_hsu_console = { - .name = "ttyMFD", - .write = serial_hsu_console_write, - .device = uart_console_device, - .setup = serial_hsu_console_setup, - .flags = CON_PRINTBUFFER, - .index = 2, - .data = &serial_hsu_reg, -}; -#endif - -struct uart_ops serial_hsu_pops = { - .tx_empty = serial_hsu_tx_empty, - .set_mctrl = serial_hsu_set_mctrl, - .get_mctrl = serial_hsu_get_mctrl, - .stop_tx = serial_hsu_stop_tx, - .start_tx = serial_hsu_start_tx, - .stop_rx = serial_hsu_stop_rx, - .enable_ms = serial_hsu_enable_ms, - .break_ctl = serial_hsu_break_ctl, - .startup = serial_hsu_startup, - .shutdown = serial_hsu_shutdown, - .set_termios = serial_hsu_set_termios, - .pm = serial_hsu_pm, - .type = serial_hsu_type, - .release_port = serial_hsu_release_port, - .request_port = serial_hsu_request_port, - .config_port = serial_hsu_config_port, - .verify_port = serial_hsu_verify_port, -}; - -static struct uart_driver serial_hsu_reg = { - .owner = THIS_MODULE, - .driver_name = "MFD serial", - .dev_name = "ttyMFD", - .major = TTY_MAJOR, - .minor = 128, - .nr = 3, -}; - -#ifdef CONFIG_PM -static int serial_hsu_suspend(struct pci_dev *pdev, pm_message_t state) -{ - void *priv = pci_get_drvdata(pdev); - struct uart_hsu_port *up; - - /* Make sure this is not the internal dma controller */ - if (priv && (pdev->device != 0x081E)) { - up = priv; - uart_suspend_port(&serial_hsu_reg, &up->port); - } - - pci_save_state(pdev); - pci_set_power_state(pdev, pci_choose_state(pdev, state)); - return 0; -} - -static int serial_hsu_resume(struct pci_dev *pdev) -{ - void *priv = pci_get_drvdata(pdev); - struct uart_hsu_port *up; - int ret; - - pci_set_power_state(pdev, PCI_D0); - pci_restore_state(pdev); - - ret = pci_enable_device(pdev); - if (ret) - dev_warn(&pdev->dev, - "HSU: can't re-enable device, try to continue\n"); - - if (priv && (pdev->device != 0x081E)) { - up = priv; - uart_resume_port(&serial_hsu_reg, &up->port); - } - return 0; -} -#else -#define serial_hsu_suspend NULL -#define serial_hsu_resume NULL -#endif - -/* temp global pointer before we settle down on using one or four PCI dev */ -static struct hsu_port *phsu; - -static int serial_hsu_probe(struct pci_dev *pdev, - const struct pci_device_id *ent) -{ - struct uart_hsu_port *uport; - int index, ret; - - printk(KERN_INFO "HSU: found PCI Serial controller(ID: %04x:%04x)\n", - pdev->vendor, pdev->device); - - switch (pdev->device) { - case 0x081B: - index = 0; - break; - case 0x081C: - index = 1; - break; - case 0x081D: - index = 2; - break; - case 0x081E: - /* internal DMA controller */ - index = 3; - break; - default: - dev_err(&pdev->dev, "HSU: out of index!"); - return -ENODEV; - } - - ret = pci_enable_device(pdev); - if (ret) - return ret; - - if (index == 3) { - /* DMA controller */ - ret = request_irq(pdev->irq, dma_irq, 0, "hsu_dma", phsu); - if (ret) { - dev_err(&pdev->dev, "can not get IRQ\n"); - goto err_disable; - } - pci_set_drvdata(pdev, phsu); - } else { - /* UART port 0~2 */ - uport = &phsu->port[index]; - uport->port.irq = pdev->irq; - uport->port.dev = &pdev->dev; - uport->dev = &pdev->dev; - - ret = request_irq(pdev->irq, port_irq, 0, uport->name, uport); - if (ret) { - dev_err(&pdev->dev, "can not get IRQ\n"); - goto err_disable; - } - uart_add_one_port(&serial_hsu_reg, &uport->port); - -#ifdef CONFIG_SERIAL_MFD_HSU_CONSOLE - if (index == 2) { - register_console(&serial_hsu_console); - uport->port.cons = &serial_hsu_console; - } -#endif - pci_set_drvdata(pdev, uport); - } - - return 0; - -err_disable: - pci_disable_device(pdev); - return ret; -} - -static void hsu_dma_rx_timeout(unsigned long data) -{ - struct hsu_dma_chan *chan = (void *)data; - struct uart_hsu_port *up = chan->uport; - struct hsu_dma_buffer *dbuf = &up->rxbuf; - int count = 0; - unsigned long flags; - - spin_lock_irqsave(&up->port.lock, flags); - - count = chan_readl(chan, HSU_CH_D0SAR) - dbuf->dma_addr; - - if (!count) { - mod_timer(&chan->rx_timer, jiffies + HSU_DMA_TIMEOUT_CHECK_FREQ); - goto exit; - } - - hsu_dma_rx(up, 0); -exit: - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static void hsu_global_init(void) -{ - struct hsu_port *hsu; - struct uart_hsu_port *uport; - struct hsu_dma_chan *dchan; - int i, ret; - - hsu = kzalloc(sizeof(struct hsu_port), GFP_KERNEL); - if (!hsu) - return; - - /* Get basic io resource and map it */ - hsu->paddr = 0xffa28000; - hsu->iolen = 0x1000; - - if (!(request_mem_region(hsu->paddr, hsu->iolen, "HSU global"))) - pr_warning("HSU: error in request mem region\n"); - - hsu->reg = ioremap_nocache((unsigned long)hsu->paddr, hsu->iolen); - if (!hsu->reg) { - pr_err("HSU: error in ioremap\n"); - ret = -ENOMEM; - goto err_free_region; - } - - /* Initialise the 3 UART ports */ - uport = hsu->port; - for (i = 0; i < 3; i++) { - uport->port.type = PORT_MFD; - uport->port.iotype = UPIO_MEM; - uport->port.mapbase = (resource_size_t)hsu->paddr - + HSU_PORT_REG_OFFSET - + i * HSU_PORT_REG_LENGTH; - uport->port.membase = hsu->reg + HSU_PORT_REG_OFFSET - + i * HSU_PORT_REG_LENGTH; - - sprintf(uport->name, "hsu_port%d", i); - uport->port.fifosize = 64; - uport->port.ops = &serial_hsu_pops; - uport->port.line = i; - uport->port.flags = UPF_IOREMAP; - /* set the scalable maxim support rate to 2746800 bps */ - uport->port.uartclk = 115200 * 24 * 16; - - uport->running = 0; - uport->txc = &hsu->chans[i * 2]; - uport->rxc = &hsu->chans[i * 2 + 1]; - - serial_hsu_ports[i] = uport; - uport->index = i; - uport++; - } - - /* Initialise 6 dma channels */ - dchan = hsu->chans; - for (i = 0; i < 6; i++) { - dchan->id = i; - dchan->dirt = (i & 0x1) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; - dchan->uport = &hsu->port[i/2]; - dchan->reg = hsu->reg + HSU_DMA_CHANS_REG_OFFSET + - i * HSU_DMA_CHANS_REG_LENGTH; - - /* Work around for RX */ - if (dchan->dirt == DMA_FROM_DEVICE) { - init_timer(&dchan->rx_timer); - dchan->rx_timer.function = hsu_dma_rx_timeout; - dchan->rx_timer.data = (unsigned long)dchan; - } - dchan++; - } - - phsu = hsu; - hsu_debugfs_init(hsu); - return; - -err_free_region: - release_mem_region(hsu->paddr, hsu->iolen); - kfree(hsu); - return; -} - -static void serial_hsu_remove(struct pci_dev *pdev) -{ - void *priv = pci_get_drvdata(pdev); - struct uart_hsu_port *up; - - if (!priv) - return; - - /* For port 0/1/2, priv is the address of uart_hsu_port */ - if (pdev->device != 0x081E) { - up = priv; - uart_remove_one_port(&serial_hsu_reg, &up->port); - } - - pci_set_drvdata(pdev, NULL); - free_irq(pdev->irq, priv); - pci_disable_device(pdev); -} - -/* First 3 are UART ports, and the 4th is the DMA */ -static const struct pci_device_id pci_ids[] __devinitdata = { - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081B) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081C) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081D) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081E) }, - {}, -}; - -static struct pci_driver hsu_pci_driver = { - .name = "HSU serial", - .id_table = pci_ids, - .probe = serial_hsu_probe, - .remove = __devexit_p(serial_hsu_remove), - .suspend = serial_hsu_suspend, - .resume = serial_hsu_resume, -}; - -static int __init hsu_pci_init(void) -{ - int ret; - - hsu_global_init(); - - ret = uart_register_driver(&serial_hsu_reg); - if (ret) - return ret; - - return pci_register_driver(&hsu_pci_driver); -} - -static void __exit hsu_pci_exit(void) -{ - pci_unregister_driver(&hsu_pci_driver); - uart_unregister_driver(&serial_hsu_reg); - - hsu_debugfs_remove(phsu); - - kfree(phsu); -} - -module_init(hsu_pci_init); -module_exit(hsu_pci_exit); - -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:medfield-hsu"); diff --git a/drivers/serial/mpc52xx_uart.c b/drivers/serial/mpc52xx_uart.c deleted file mode 100644 index 126ec7f568ec..000000000000 --- a/drivers/serial/mpc52xx_uart.c +++ /dev/null @@ -1,1527 +0,0 @@ -/* - * Driver for the PSC of the Freescale MPC52xx PSCs configured as UARTs. - * - * FIXME According to the usermanual the status bits in the status register - * are only updated when the peripherals access the FIFO and not when the - * CPU access them. So since we use this bits to know when we stop writing - * and reading, they may not be updated in-time and a race condition may - * exists. But I haven't be able to prove this and I don't care. But if - * any problem arises, it might worth checking. The TX/RX FIFO Stats - * registers should be used in addition. - * Update: Actually, they seem updated ... At least the bits we use. - * - * - * Maintainer : Sylvain Munaut <tnt@246tNt.com> - * - * Some of the code has been inspired/copied from the 2.4 code written - * by Dale Farnsworth <dfarnsworth@mvista.com>. - * - * Copyright (C) 2008 Freescale Semiconductor Inc. - * John Rigby <jrigby@gmail.com> - * Added support for MPC5121 - * Copyright (C) 2006 Secret Lab Technologies Ltd. - * Grant Likely <grant.likely@secretlab.ca> - * Copyright (C) 2004-2006 Sylvain Munaut <tnt@246tNt.com> - * Copyright (C) 2003 MontaVista, Software, Inc. - * - * This file is licensed under the terms of the GNU General Public License - * version 2. This program is licensed "as is" without any warranty of any - * kind, whether express or implied. - */ - -#undef DEBUG - -#include <linux/device.h> -#include <linux/module.h> -#include <linux/tty.h> -#include <linux/serial.h> -#include <linux/sysrq.h> -#include <linux/console.h> -#include <linux/delay.h> -#include <linux/io.h> -#include <linux/of.h> -#include <linux/of_platform.h> -#include <linux/clk.h> - -#include <asm/mpc52xx.h> -#include <asm/mpc52xx_psc.h> - -#if defined(CONFIG_SERIAL_MPC52xx_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/serial_core.h> - - -/* We've been assigned a range on the "Low-density serial ports" major */ -#define SERIAL_PSC_MAJOR 204 -#define SERIAL_PSC_MINOR 148 - - -#define ISR_PASS_LIMIT 256 /* Max number of iteration in the interrupt */ - - -static struct uart_port mpc52xx_uart_ports[MPC52xx_PSC_MAXNUM]; - /* Rem: - We use the read_status_mask as a shadow of - * psc->mpc52xx_psc_imr - * - It's important that is array is all zero on start as we - * use it to know if it's initialized or not ! If it's not sure - * it's cleared, then a memset(...,0,...) should be added to - * the console_init - */ - -/* lookup table for matching device nodes to index numbers */ -static struct device_node *mpc52xx_uart_nodes[MPC52xx_PSC_MAXNUM]; - -static void mpc52xx_uart_of_enumerate(void); - - -#define PSC(port) ((struct mpc52xx_psc __iomem *)((port)->membase)) - - -/* Forward declaration of the interruption handling routine */ -static irqreturn_t mpc52xx_uart_int(int irq, void *dev_id); -static irqreturn_t mpc5xxx_uart_process_int(struct uart_port *port); - - -/* Simple macro to test if a port is console or not. This one is taken - * for serial_core.c and maybe should be moved to serial_core.h ? */ -#ifdef CONFIG_SERIAL_CORE_CONSOLE -#define uart_console(port) \ - ((port)->cons && (port)->cons->index == (port)->line) -#else -#define uart_console(port) (0) -#endif - -/* ======================================================================== */ -/* PSC fifo operations for isolating differences between 52xx and 512x */ -/* ======================================================================== */ - -struct psc_ops { - void (*fifo_init)(struct uart_port *port); - int (*raw_rx_rdy)(struct uart_port *port); - int (*raw_tx_rdy)(struct uart_port *port); - int (*rx_rdy)(struct uart_port *port); - int (*tx_rdy)(struct uart_port *port); - int (*tx_empty)(struct uart_port *port); - void (*stop_rx)(struct uart_port *port); - void (*start_tx)(struct uart_port *port); - void (*stop_tx)(struct uart_port *port); - void (*rx_clr_irq)(struct uart_port *port); - void (*tx_clr_irq)(struct uart_port *port); - void (*write_char)(struct uart_port *port, unsigned char c); - unsigned char (*read_char)(struct uart_port *port); - void (*cw_disable_ints)(struct uart_port *port); - void (*cw_restore_ints)(struct uart_port *port); - unsigned int (*set_baudrate)(struct uart_port *port, - struct ktermios *new, - struct ktermios *old); - int (*clock)(struct uart_port *port, int enable); - int (*fifoc_init)(void); - void (*fifoc_uninit)(void); - void (*get_irq)(struct uart_port *, struct device_node *); - irqreturn_t (*handle_irq)(struct uart_port *port); -}; - -/* setting the prescaler and divisor reg is common for all chips */ -static inline void mpc52xx_set_divisor(struct mpc52xx_psc __iomem *psc, - u16 prescaler, unsigned int divisor) -{ - /* select prescaler */ - out_be16(&psc->mpc52xx_psc_clock_select, prescaler); - out_8(&psc->ctur, divisor >> 8); - out_8(&psc->ctlr, divisor & 0xff); -} - -#ifdef CONFIG_PPC_MPC52xx -#define FIFO_52xx(port) ((struct mpc52xx_psc_fifo __iomem *)(PSC(port)+1)) -static void mpc52xx_psc_fifo_init(struct uart_port *port) -{ - struct mpc52xx_psc __iomem *psc = PSC(port); - struct mpc52xx_psc_fifo __iomem *fifo = FIFO_52xx(port); - - out_8(&fifo->rfcntl, 0x00); - out_be16(&fifo->rfalarm, 0x1ff); - out_8(&fifo->tfcntl, 0x07); - out_be16(&fifo->tfalarm, 0x80); - - port->read_status_mask |= MPC52xx_PSC_IMR_RXRDY | MPC52xx_PSC_IMR_TXRDY; - out_be16(&psc->mpc52xx_psc_imr, port->read_status_mask); -} - -static int mpc52xx_psc_raw_rx_rdy(struct uart_port *port) -{ - return in_be16(&PSC(port)->mpc52xx_psc_status) - & MPC52xx_PSC_SR_RXRDY; -} - -static int mpc52xx_psc_raw_tx_rdy(struct uart_port *port) -{ - return in_be16(&PSC(port)->mpc52xx_psc_status) - & MPC52xx_PSC_SR_TXRDY; -} - - -static int mpc52xx_psc_rx_rdy(struct uart_port *port) -{ - return in_be16(&PSC(port)->mpc52xx_psc_isr) - & port->read_status_mask - & MPC52xx_PSC_IMR_RXRDY; -} - -static int mpc52xx_psc_tx_rdy(struct uart_port *port) -{ - return in_be16(&PSC(port)->mpc52xx_psc_isr) - & port->read_status_mask - & MPC52xx_PSC_IMR_TXRDY; -} - -static int mpc52xx_psc_tx_empty(struct uart_port *port) -{ - return in_be16(&PSC(port)->mpc52xx_psc_status) - & MPC52xx_PSC_SR_TXEMP; -} - -static void mpc52xx_psc_start_tx(struct uart_port *port) -{ - port->read_status_mask |= MPC52xx_PSC_IMR_TXRDY; - out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask); -} - -static void mpc52xx_psc_stop_tx(struct uart_port *port) -{ - port->read_status_mask &= ~MPC52xx_PSC_IMR_TXRDY; - out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask); -} - -static void mpc52xx_psc_stop_rx(struct uart_port *port) -{ - port->read_status_mask &= ~MPC52xx_PSC_IMR_RXRDY; - out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask); -} - -static void mpc52xx_psc_rx_clr_irq(struct uart_port *port) -{ -} - -static void mpc52xx_psc_tx_clr_irq(struct uart_port *port) -{ -} - -static void mpc52xx_psc_write_char(struct uart_port *port, unsigned char c) -{ - out_8(&PSC(port)->mpc52xx_psc_buffer_8, c); -} - -static unsigned char mpc52xx_psc_read_char(struct uart_port *port) -{ - return in_8(&PSC(port)->mpc52xx_psc_buffer_8); -} - -static void mpc52xx_psc_cw_disable_ints(struct uart_port *port) -{ - out_be16(&PSC(port)->mpc52xx_psc_imr, 0); -} - -static void mpc52xx_psc_cw_restore_ints(struct uart_port *port) -{ - out_be16(&PSC(port)->mpc52xx_psc_imr, port->read_status_mask); -} - -static unsigned int mpc5200_psc_set_baudrate(struct uart_port *port, - struct ktermios *new, - struct ktermios *old) -{ - unsigned int baud; - unsigned int divisor; - - /* The 5200 has a fixed /32 prescaler, uartclk contains the ipb freq */ - baud = uart_get_baud_rate(port, new, old, - port->uartclk / (32 * 0xffff) + 1, - port->uartclk / 32); - divisor = (port->uartclk + 16 * baud) / (32 * baud); - - /* enable the /32 prescaler and set the divisor */ - mpc52xx_set_divisor(PSC(port), 0xdd00, divisor); - return baud; -} - -static unsigned int mpc5200b_psc_set_baudrate(struct uart_port *port, - struct ktermios *new, - struct ktermios *old) -{ - unsigned int baud; - unsigned int divisor; - u16 prescaler; - - /* The 5200B has a selectable /4 or /32 prescaler, uartclk contains the - * ipb freq */ - baud = uart_get_baud_rate(port, new, old, - port->uartclk / (32 * 0xffff) + 1, - port->uartclk / 4); - divisor = (port->uartclk + 2 * baud) / (4 * baud); - - /* select the proper prescaler and set the divisor */ - if (divisor > 0xffff) { - divisor = (divisor + 4) / 8; - prescaler = 0xdd00; /* /32 */ - } else - prescaler = 0xff00; /* /4 */ - mpc52xx_set_divisor(PSC(port), prescaler, divisor); - return baud; -} - -static void mpc52xx_psc_get_irq(struct uart_port *port, struct device_node *np) -{ - port->irqflags = IRQF_DISABLED; - port->irq = irq_of_parse_and_map(np, 0); -} - -/* 52xx specific interrupt handler. The caller holds the port lock */ -static irqreturn_t mpc52xx_psc_handle_irq(struct uart_port *port) -{ - return mpc5xxx_uart_process_int(port); -} - -static struct psc_ops mpc52xx_psc_ops = { - .fifo_init = mpc52xx_psc_fifo_init, - .raw_rx_rdy = mpc52xx_psc_raw_rx_rdy, - .raw_tx_rdy = mpc52xx_psc_raw_tx_rdy, - .rx_rdy = mpc52xx_psc_rx_rdy, - .tx_rdy = mpc52xx_psc_tx_rdy, - .tx_empty = mpc52xx_psc_tx_empty, - .stop_rx = mpc52xx_psc_stop_rx, - .start_tx = mpc52xx_psc_start_tx, - .stop_tx = mpc52xx_psc_stop_tx, - .rx_clr_irq = mpc52xx_psc_rx_clr_irq, - .tx_clr_irq = mpc52xx_psc_tx_clr_irq, - .write_char = mpc52xx_psc_write_char, - .read_char = mpc52xx_psc_read_char, - .cw_disable_ints = mpc52xx_psc_cw_disable_ints, - .cw_restore_ints = mpc52xx_psc_cw_restore_ints, - .set_baudrate = mpc5200_psc_set_baudrate, - .get_irq = mpc52xx_psc_get_irq, - .handle_irq = mpc52xx_psc_handle_irq, -}; - -static struct psc_ops mpc5200b_psc_ops = { - .fifo_init = mpc52xx_psc_fifo_init, - .raw_rx_rdy = mpc52xx_psc_raw_rx_rdy, - .raw_tx_rdy = mpc52xx_psc_raw_tx_rdy, - .rx_rdy = mpc52xx_psc_rx_rdy, - .tx_rdy = mpc52xx_psc_tx_rdy, - .tx_empty = mpc52xx_psc_tx_empty, - .stop_rx = mpc52xx_psc_stop_rx, - .start_tx = mpc52xx_psc_start_tx, - .stop_tx = mpc52xx_psc_stop_tx, - .rx_clr_irq = mpc52xx_psc_rx_clr_irq, - .tx_clr_irq = mpc52xx_psc_tx_clr_irq, - .write_char = mpc52xx_psc_write_char, - .read_char = mpc52xx_psc_read_char, - .cw_disable_ints = mpc52xx_psc_cw_disable_ints, - .cw_restore_ints = mpc52xx_psc_cw_restore_ints, - .set_baudrate = mpc5200b_psc_set_baudrate, - .get_irq = mpc52xx_psc_get_irq, - .handle_irq = mpc52xx_psc_handle_irq, -}; - -#endif /* CONFIG_MPC52xx */ - -#ifdef CONFIG_PPC_MPC512x -#define FIFO_512x(port) ((struct mpc512x_psc_fifo __iomem *)(PSC(port)+1)) - -/* PSC FIFO Controller for mpc512x */ -struct psc_fifoc { - u32 fifoc_cmd; - u32 fifoc_int; - u32 fifoc_dma; - u32 fifoc_axe; - u32 fifoc_debug; -}; - -static struct psc_fifoc __iomem *psc_fifoc; -static unsigned int psc_fifoc_irq; - -static void mpc512x_psc_fifo_init(struct uart_port *port) -{ - /* /32 prescaler */ - out_be16(&PSC(port)->mpc52xx_psc_clock_select, 0xdd00); - - out_be32(&FIFO_512x(port)->txcmd, MPC512x_PSC_FIFO_RESET_SLICE); - out_be32(&FIFO_512x(port)->txcmd, MPC512x_PSC_FIFO_ENABLE_SLICE); - out_be32(&FIFO_512x(port)->txalarm, 1); - out_be32(&FIFO_512x(port)->tximr, 0); - - out_be32(&FIFO_512x(port)->rxcmd, MPC512x_PSC_FIFO_RESET_SLICE); - out_be32(&FIFO_512x(port)->rxcmd, MPC512x_PSC_FIFO_ENABLE_SLICE); - out_be32(&FIFO_512x(port)->rxalarm, 1); - out_be32(&FIFO_512x(port)->rximr, 0); - - out_be32(&FIFO_512x(port)->tximr, MPC512x_PSC_FIFO_ALARM); - out_be32(&FIFO_512x(port)->rximr, MPC512x_PSC_FIFO_ALARM); -} - -static int mpc512x_psc_raw_rx_rdy(struct uart_port *port) -{ - return !(in_be32(&FIFO_512x(port)->rxsr) & MPC512x_PSC_FIFO_EMPTY); -} - -static int mpc512x_psc_raw_tx_rdy(struct uart_port *port) -{ - return !(in_be32(&FIFO_512x(port)->txsr) & MPC512x_PSC_FIFO_FULL); -} - -static int mpc512x_psc_rx_rdy(struct uart_port *port) -{ - return in_be32(&FIFO_512x(port)->rxsr) - & in_be32(&FIFO_512x(port)->rximr) - & MPC512x_PSC_FIFO_ALARM; -} - -static int mpc512x_psc_tx_rdy(struct uart_port *port) -{ - return in_be32(&FIFO_512x(port)->txsr) - & in_be32(&FIFO_512x(port)->tximr) - & MPC512x_PSC_FIFO_ALARM; -} - -static int mpc512x_psc_tx_empty(struct uart_port *port) -{ - return in_be32(&FIFO_512x(port)->txsr) - & MPC512x_PSC_FIFO_EMPTY; -} - -static void mpc512x_psc_stop_rx(struct uart_port *port) -{ - unsigned long rx_fifo_imr; - - rx_fifo_imr = in_be32(&FIFO_512x(port)->rximr); - rx_fifo_imr &= ~MPC512x_PSC_FIFO_ALARM; - out_be32(&FIFO_512x(port)->rximr, rx_fifo_imr); -} - -static void mpc512x_psc_start_tx(struct uart_port *port) -{ - unsigned long tx_fifo_imr; - - tx_fifo_imr = in_be32(&FIFO_512x(port)->tximr); - tx_fifo_imr |= MPC512x_PSC_FIFO_ALARM; - out_be32(&FIFO_512x(port)->tximr, tx_fifo_imr); -} - -static void mpc512x_psc_stop_tx(struct uart_port *port) -{ - unsigned long tx_fifo_imr; - - tx_fifo_imr = in_be32(&FIFO_512x(port)->tximr); - tx_fifo_imr &= ~MPC512x_PSC_FIFO_ALARM; - out_be32(&FIFO_512x(port)->tximr, tx_fifo_imr); -} - -static void mpc512x_psc_rx_clr_irq(struct uart_port *port) -{ - out_be32(&FIFO_512x(port)->rxisr, in_be32(&FIFO_512x(port)->rxisr)); -} - -static void mpc512x_psc_tx_clr_irq(struct uart_port *port) -{ - out_be32(&FIFO_512x(port)->txisr, in_be32(&FIFO_512x(port)->txisr)); -} - -static void mpc512x_psc_write_char(struct uart_port *port, unsigned char c) -{ - out_8(&FIFO_512x(port)->txdata_8, c); -} - -static unsigned char mpc512x_psc_read_char(struct uart_port *port) -{ - return in_8(&FIFO_512x(port)->rxdata_8); -} - -static void mpc512x_psc_cw_disable_ints(struct uart_port *port) -{ - port->read_status_mask = - in_be32(&FIFO_512x(port)->tximr) << 16 | - in_be32(&FIFO_512x(port)->rximr); - out_be32(&FIFO_512x(port)->tximr, 0); - out_be32(&FIFO_512x(port)->rximr, 0); -} - -static void mpc512x_psc_cw_restore_ints(struct uart_port *port) -{ - out_be32(&FIFO_512x(port)->tximr, - (port->read_status_mask >> 16) & 0x7f); - out_be32(&FIFO_512x(port)->rximr, port->read_status_mask & 0x7f); -} - -static unsigned int mpc512x_psc_set_baudrate(struct uart_port *port, - struct ktermios *new, - struct ktermios *old) -{ - unsigned int baud; - unsigned int divisor; - - /* - * The "MPC5121e Microcontroller Reference Manual, Rev. 3" says on - * pg. 30-10 that the chip supports a /32 and a /10 prescaler. - * Furthermore, it states that "After reset, the prescaler by 10 - * for the UART mode is selected", but the reset register value is - * 0x0000 which means a /32 prescaler. This is wrong. - * - * In reality using /32 prescaler doesn't work, as it is not supported! - * Use /16 or /10 prescaler, see "MPC5121e Hardware Design Guide", - * Chapter 4.1 PSC in UART Mode. - * Calculate with a /16 prescaler here. - */ - - /* uartclk contains the ips freq */ - baud = uart_get_baud_rate(port, new, old, - port->uartclk / (16 * 0xffff) + 1, - port->uartclk / 16); - divisor = (port->uartclk + 8 * baud) / (16 * baud); - - /* enable the /16 prescaler and set the divisor */ - mpc52xx_set_divisor(PSC(port), 0xdd00, divisor); - return baud; -} - -/* Init PSC FIFO Controller */ -static int __init mpc512x_psc_fifoc_init(void) -{ - struct device_node *np; - - np = of_find_compatible_node(NULL, NULL, - "fsl,mpc5121-psc-fifo"); - if (!np) { - pr_err("%s: Can't find FIFOC node\n", __func__); - return -ENODEV; - } - - psc_fifoc = of_iomap(np, 0); - if (!psc_fifoc) { - pr_err("%s: Can't map FIFOC\n", __func__); - of_node_put(np); - return -ENODEV; - } - - psc_fifoc_irq = irq_of_parse_and_map(np, 0); - of_node_put(np); - if (psc_fifoc_irq == NO_IRQ) { - pr_err("%s: Can't get FIFOC irq\n", __func__); - iounmap(psc_fifoc); - return -ENODEV; - } - - return 0; -} - -static void __exit mpc512x_psc_fifoc_uninit(void) -{ - iounmap(psc_fifoc); -} - -/* 512x specific interrupt handler. The caller holds the port lock */ -static irqreturn_t mpc512x_psc_handle_irq(struct uart_port *port) -{ - unsigned long fifoc_int; - int psc_num; - - /* Read pending PSC FIFOC interrupts */ - fifoc_int = in_be32(&psc_fifoc->fifoc_int); - - /* Check if it is an interrupt for this port */ - psc_num = (port->mapbase & 0xf00) >> 8; - if (test_bit(psc_num, &fifoc_int) || - test_bit(psc_num + 16, &fifoc_int)) - return mpc5xxx_uart_process_int(port); - - return IRQ_NONE; -} - -static int mpc512x_psc_clock(struct uart_port *port, int enable) -{ - struct clk *psc_clk; - int psc_num; - char clk_name[10]; - - if (uart_console(port)) - return 0; - - psc_num = (port->mapbase & 0xf00) >> 8; - snprintf(clk_name, sizeof(clk_name), "psc%d_clk", psc_num); - psc_clk = clk_get(port->dev, clk_name); - if (IS_ERR(psc_clk)) { - dev_err(port->dev, "Failed to get PSC clock entry!\n"); - return -ENODEV; - } - - dev_dbg(port->dev, "%s %sable\n", clk_name, enable ? "en" : "dis"); - - if (enable) - clk_enable(psc_clk); - else - clk_disable(psc_clk); - - return 0; -} - -static void mpc512x_psc_get_irq(struct uart_port *port, struct device_node *np) -{ - port->irqflags = IRQF_SHARED; - port->irq = psc_fifoc_irq; -} - -static struct psc_ops mpc512x_psc_ops = { - .fifo_init = mpc512x_psc_fifo_init, - .raw_rx_rdy = mpc512x_psc_raw_rx_rdy, - .raw_tx_rdy = mpc512x_psc_raw_tx_rdy, - .rx_rdy = mpc512x_psc_rx_rdy, - .tx_rdy = mpc512x_psc_tx_rdy, - .tx_empty = mpc512x_psc_tx_empty, - .stop_rx = mpc512x_psc_stop_rx, - .start_tx = mpc512x_psc_start_tx, - .stop_tx = mpc512x_psc_stop_tx, - .rx_clr_irq = mpc512x_psc_rx_clr_irq, - .tx_clr_irq = mpc512x_psc_tx_clr_irq, - .write_char = mpc512x_psc_write_char, - .read_char = mpc512x_psc_read_char, - .cw_disable_ints = mpc512x_psc_cw_disable_ints, - .cw_restore_ints = mpc512x_psc_cw_restore_ints, - .set_baudrate = mpc512x_psc_set_baudrate, - .clock = mpc512x_psc_clock, - .fifoc_init = mpc512x_psc_fifoc_init, - .fifoc_uninit = mpc512x_psc_fifoc_uninit, - .get_irq = mpc512x_psc_get_irq, - .handle_irq = mpc512x_psc_handle_irq, -}; -#endif - -static struct psc_ops *psc_ops; - -/* ======================================================================== */ -/* UART operations */ -/* ======================================================================== */ - -static unsigned int -mpc52xx_uart_tx_empty(struct uart_port *port) -{ - return psc_ops->tx_empty(port) ? TIOCSER_TEMT : 0; -} - -static void -mpc52xx_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - if (mctrl & TIOCM_RTS) - out_8(&PSC(port)->op1, MPC52xx_PSC_OP_RTS); - else - out_8(&PSC(port)->op0, MPC52xx_PSC_OP_RTS); -} - -static unsigned int -mpc52xx_uart_get_mctrl(struct uart_port *port) -{ - unsigned int ret = TIOCM_DSR; - u8 status = in_8(&PSC(port)->mpc52xx_psc_ipcr); - - if (!(status & MPC52xx_PSC_CTS)) - ret |= TIOCM_CTS; - if (!(status & MPC52xx_PSC_DCD)) - ret |= TIOCM_CAR; - - return ret; -} - -static void -mpc52xx_uart_stop_tx(struct uart_port *port) -{ - /* port->lock taken by caller */ - psc_ops->stop_tx(port); -} - -static void -mpc52xx_uart_start_tx(struct uart_port *port) -{ - /* port->lock taken by caller */ - psc_ops->start_tx(port); -} - -static void -mpc52xx_uart_send_xchar(struct uart_port *port, char ch) -{ - unsigned long flags; - spin_lock_irqsave(&port->lock, flags); - - port->x_char = ch; - if (ch) { - /* Make sure tx interrupts are on */ - /* Truly necessary ??? They should be anyway */ - psc_ops->start_tx(port); - } - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void -mpc52xx_uart_stop_rx(struct uart_port *port) -{ - /* port->lock taken by caller */ - psc_ops->stop_rx(port); -} - -static void -mpc52xx_uart_enable_ms(struct uart_port *port) -{ - struct mpc52xx_psc __iomem *psc = PSC(port); - - /* clear D_*-bits by reading them */ - in_8(&psc->mpc52xx_psc_ipcr); - /* enable CTS and DCD as IPC interrupts */ - out_8(&psc->mpc52xx_psc_acr, MPC52xx_PSC_IEC_CTS | MPC52xx_PSC_IEC_DCD); - - port->read_status_mask |= MPC52xx_PSC_IMR_IPC; - out_be16(&psc->mpc52xx_psc_imr, port->read_status_mask); -} - -static void -mpc52xx_uart_break_ctl(struct uart_port *port, int ctl) -{ - unsigned long flags; - spin_lock_irqsave(&port->lock, flags); - - if (ctl == -1) - out_8(&PSC(port)->command, MPC52xx_PSC_START_BRK); - else - out_8(&PSC(port)->command, MPC52xx_PSC_STOP_BRK); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static int -mpc52xx_uart_startup(struct uart_port *port) -{ - struct mpc52xx_psc __iomem *psc = PSC(port); - int ret; - - if (psc_ops->clock) { - ret = psc_ops->clock(port, 1); - if (ret) - return ret; - } - - /* Request IRQ */ - ret = request_irq(port->irq, mpc52xx_uart_int, - port->irqflags, "mpc52xx_psc_uart", port); - if (ret) - return ret; - - /* Reset/activate the port, clear and enable interrupts */ - out_8(&psc->command, MPC52xx_PSC_RST_RX); - out_8(&psc->command, MPC52xx_PSC_RST_TX); - - out_be32(&psc->sicr, 0); /* UART mode DCD ignored */ - - psc_ops->fifo_init(port); - - out_8(&psc->command, MPC52xx_PSC_TX_ENABLE); - out_8(&psc->command, MPC52xx_PSC_RX_ENABLE); - - return 0; -} - -static void -mpc52xx_uart_shutdown(struct uart_port *port) -{ - struct mpc52xx_psc __iomem *psc = PSC(port); - - /* Shut down the port. Leave TX active if on a console port */ - out_8(&psc->command, MPC52xx_PSC_RST_RX); - if (!uart_console(port)) - out_8(&psc->command, MPC52xx_PSC_RST_TX); - - port->read_status_mask = 0; - out_be16(&psc->mpc52xx_psc_imr, port->read_status_mask); - - if (psc_ops->clock) - psc_ops->clock(port, 0); - - /* Release interrupt */ - free_irq(port->irq, port); -} - -static void -mpc52xx_uart_set_termios(struct uart_port *port, struct ktermios *new, - struct ktermios *old) -{ - struct mpc52xx_psc __iomem *psc = PSC(port); - unsigned long flags; - unsigned char mr1, mr2; - unsigned int j; - unsigned int baud; - - /* Prepare what we're gonna write */ - mr1 = 0; - - switch (new->c_cflag & CSIZE) { - case CS5: mr1 |= MPC52xx_PSC_MODE_5_BITS; - break; - case CS6: mr1 |= MPC52xx_PSC_MODE_6_BITS; - break; - case CS7: mr1 |= MPC52xx_PSC_MODE_7_BITS; - break; - case CS8: - default: mr1 |= MPC52xx_PSC_MODE_8_BITS; - } - - if (new->c_cflag & PARENB) { - mr1 |= (new->c_cflag & PARODD) ? - MPC52xx_PSC_MODE_PARODD : MPC52xx_PSC_MODE_PAREVEN; - } else - mr1 |= MPC52xx_PSC_MODE_PARNONE; - - - mr2 = 0; - - if (new->c_cflag & CSTOPB) - mr2 |= MPC52xx_PSC_MODE_TWO_STOP; - else - mr2 |= ((new->c_cflag & CSIZE) == CS5) ? - MPC52xx_PSC_MODE_ONE_STOP_5_BITS : - MPC52xx_PSC_MODE_ONE_STOP; - - if (new->c_cflag & CRTSCTS) { - mr1 |= MPC52xx_PSC_MODE_RXRTS; - mr2 |= MPC52xx_PSC_MODE_TXCTS; - } - - /* Get the lock */ - spin_lock_irqsave(&port->lock, flags); - - /* Do our best to flush TX & RX, so we don't lose anything */ - /* But we don't wait indefinitely ! */ - j = 5000000; /* Maximum wait */ - /* FIXME Can't receive chars since set_termios might be called at early - * boot for the console, all stuff is not yet ready to receive at that - * time and that just makes the kernel oops */ - /* while (j-- && mpc52xx_uart_int_rx_chars(port)); */ - while (!mpc52xx_uart_tx_empty(port) && --j) - udelay(1); - - if (!j) - printk(KERN_ERR "mpc52xx_uart.c: " - "Unable to flush RX & TX fifos in-time in set_termios." - "Some chars may have been lost.\n"); - - /* Reset the TX & RX */ - out_8(&psc->command, MPC52xx_PSC_RST_RX); - out_8(&psc->command, MPC52xx_PSC_RST_TX); - - /* Send new mode settings */ - out_8(&psc->command, MPC52xx_PSC_SEL_MODE_REG_1); - out_8(&psc->mode, mr1); - out_8(&psc->mode, mr2); - baud = psc_ops->set_baudrate(port, new, old); - - /* Update the per-port timeout */ - uart_update_timeout(port, new->c_cflag, baud); - - if (UART_ENABLE_MS(port, new->c_cflag)) - mpc52xx_uart_enable_ms(port); - - /* Reenable TX & RX */ - out_8(&psc->command, MPC52xx_PSC_TX_ENABLE); - out_8(&psc->command, MPC52xx_PSC_RX_ENABLE); - - /* We're all set, release the lock */ - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char * -mpc52xx_uart_type(struct uart_port *port) -{ - /* - * We keep using PORT_MPC52xx for historic reasons although it applies - * for MPC512x, too, but print "MPC5xxx" to not irritate users - */ - return port->type == PORT_MPC52xx ? "MPC5xxx PSC" : NULL; -} - -static void -mpc52xx_uart_release_port(struct uart_port *port) -{ - /* remapped by us ? */ - if (port->flags & UPF_IOREMAP) { - iounmap(port->membase); - port->membase = NULL; - } - - release_mem_region(port->mapbase, sizeof(struct mpc52xx_psc)); -} - -static int -mpc52xx_uart_request_port(struct uart_port *port) -{ - int err; - - if (port->flags & UPF_IOREMAP) /* Need to remap ? */ - port->membase = ioremap(port->mapbase, - sizeof(struct mpc52xx_psc)); - - if (!port->membase) - return -EINVAL; - - err = request_mem_region(port->mapbase, sizeof(struct mpc52xx_psc), - "mpc52xx_psc_uart") != NULL ? 0 : -EBUSY; - - if (err && (port->flags & UPF_IOREMAP)) { - iounmap(port->membase); - port->membase = NULL; - } - - return err; -} - -static void -mpc52xx_uart_config_port(struct uart_port *port, int flags) -{ - if ((flags & UART_CONFIG_TYPE) - && (mpc52xx_uart_request_port(port) == 0)) - port->type = PORT_MPC52xx; -} - -static int -mpc52xx_uart_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - if (ser->type != PORT_UNKNOWN && ser->type != PORT_MPC52xx) - return -EINVAL; - - if ((ser->irq != port->irq) || - (ser->io_type != UPIO_MEM) || - (ser->baud_base != port->uartclk) || - (ser->iomem_base != (void *)port->mapbase) || - (ser->hub6 != 0)) - return -EINVAL; - - return 0; -} - - -static struct uart_ops mpc52xx_uart_ops = { - .tx_empty = mpc52xx_uart_tx_empty, - .set_mctrl = mpc52xx_uart_set_mctrl, - .get_mctrl = mpc52xx_uart_get_mctrl, - .stop_tx = mpc52xx_uart_stop_tx, - .start_tx = mpc52xx_uart_start_tx, - .send_xchar = mpc52xx_uart_send_xchar, - .stop_rx = mpc52xx_uart_stop_rx, - .enable_ms = mpc52xx_uart_enable_ms, - .break_ctl = mpc52xx_uart_break_ctl, - .startup = mpc52xx_uart_startup, - .shutdown = mpc52xx_uart_shutdown, - .set_termios = mpc52xx_uart_set_termios, -/* .pm = mpc52xx_uart_pm, Not supported yet */ -/* .set_wake = mpc52xx_uart_set_wake, Not supported yet */ - .type = mpc52xx_uart_type, - .release_port = mpc52xx_uart_release_port, - .request_port = mpc52xx_uart_request_port, - .config_port = mpc52xx_uart_config_port, - .verify_port = mpc52xx_uart_verify_port -}; - - -/* ======================================================================== */ -/* Interrupt handling */ -/* ======================================================================== */ - -static inline int -mpc52xx_uart_int_rx_chars(struct uart_port *port) -{ - struct tty_struct *tty = port->state->port.tty; - unsigned char ch, flag; - unsigned short status; - - /* While we can read, do so ! */ - while (psc_ops->raw_rx_rdy(port)) { - /* Get the char */ - ch = psc_ops->read_char(port); - - /* Handle sysreq char */ -#ifdef SUPPORT_SYSRQ - if (uart_handle_sysrq_char(port, ch)) { - port->sysrq = 0; - continue; - } -#endif - - /* Store it */ - - flag = TTY_NORMAL; - port->icount.rx++; - - status = in_be16(&PSC(port)->mpc52xx_psc_status); - - if (status & (MPC52xx_PSC_SR_PE | - MPC52xx_PSC_SR_FE | - MPC52xx_PSC_SR_RB)) { - - if (status & MPC52xx_PSC_SR_RB) { - flag = TTY_BREAK; - uart_handle_break(port); - port->icount.brk++; - } else if (status & MPC52xx_PSC_SR_PE) { - flag = TTY_PARITY; - port->icount.parity++; - } - else if (status & MPC52xx_PSC_SR_FE) { - flag = TTY_FRAME; - port->icount.frame++; - } - - /* Clear error condition */ - out_8(&PSC(port)->command, MPC52xx_PSC_RST_ERR_STAT); - - } - tty_insert_flip_char(tty, ch, flag); - if (status & MPC52xx_PSC_SR_OE) { - /* - * Overrun is special, since it's - * reported immediately, and doesn't - * affect the current character - */ - tty_insert_flip_char(tty, 0, TTY_OVERRUN); - port->icount.overrun++; - } - } - - spin_unlock(&port->lock); - tty_flip_buffer_push(tty); - spin_lock(&port->lock); - - return psc_ops->raw_rx_rdy(port); -} - -static inline int -mpc52xx_uart_int_tx_chars(struct uart_port *port) -{ - struct circ_buf *xmit = &port->state->xmit; - - /* Process out of band chars */ - if (port->x_char) { - psc_ops->write_char(port, port->x_char); - port->icount.tx++; - port->x_char = 0; - return 1; - } - - /* Nothing to do ? */ - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - mpc52xx_uart_stop_tx(port); - return 0; - } - - /* Send chars */ - while (psc_ops->raw_tx_rdy(port)) { - psc_ops->write_char(port, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - if (uart_circ_empty(xmit)) - break; - } - - /* Wake up */ - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - /* Maybe we're done after all */ - if (uart_circ_empty(xmit)) { - mpc52xx_uart_stop_tx(port); - return 0; - } - - return 1; -} - -static irqreturn_t -mpc5xxx_uart_process_int(struct uart_port *port) -{ - unsigned long pass = ISR_PASS_LIMIT; - unsigned int keepgoing; - u8 status; - - /* While we have stuff to do, we continue */ - do { - /* If we don't find anything to do, we stop */ - keepgoing = 0; - - psc_ops->rx_clr_irq(port); - if (psc_ops->rx_rdy(port)) - keepgoing |= mpc52xx_uart_int_rx_chars(port); - - psc_ops->tx_clr_irq(port); - if (psc_ops->tx_rdy(port)) - keepgoing |= mpc52xx_uart_int_tx_chars(port); - - status = in_8(&PSC(port)->mpc52xx_psc_ipcr); - if (status & MPC52xx_PSC_D_DCD) - uart_handle_dcd_change(port, !(status & MPC52xx_PSC_DCD)); - - if (status & MPC52xx_PSC_D_CTS) - uart_handle_cts_change(port, !(status & MPC52xx_PSC_CTS)); - - /* Limit number of iteration */ - if (!(--pass)) - keepgoing = 0; - - } while (keepgoing); - - return IRQ_HANDLED; -} - -static irqreturn_t -mpc52xx_uart_int(int irq, void *dev_id) -{ - struct uart_port *port = dev_id; - irqreturn_t ret; - - spin_lock(&port->lock); - - ret = psc_ops->handle_irq(port); - - spin_unlock(&port->lock); - - return ret; -} - -/* ======================================================================== */ -/* Console ( if applicable ) */ -/* ======================================================================== */ - -#ifdef CONFIG_SERIAL_MPC52xx_CONSOLE - -static void __init -mpc52xx_console_get_options(struct uart_port *port, - int *baud, int *parity, int *bits, int *flow) -{ - struct mpc52xx_psc __iomem *psc = PSC(port); - unsigned char mr1; - - pr_debug("mpc52xx_console_get_options(port=%p)\n", port); - - /* Read the mode registers */ - out_8(&psc->command, MPC52xx_PSC_SEL_MODE_REG_1); - mr1 = in_8(&psc->mode); - - /* CT{U,L}R are write-only ! */ - *baud = CONFIG_SERIAL_MPC52xx_CONSOLE_BAUD; - - /* Parse them */ - switch (mr1 & MPC52xx_PSC_MODE_BITS_MASK) { - case MPC52xx_PSC_MODE_5_BITS: - *bits = 5; - break; - case MPC52xx_PSC_MODE_6_BITS: - *bits = 6; - break; - case MPC52xx_PSC_MODE_7_BITS: - *bits = 7; - break; - case MPC52xx_PSC_MODE_8_BITS: - default: - *bits = 8; - } - - if (mr1 & MPC52xx_PSC_MODE_PARNONE) - *parity = 'n'; - else - *parity = mr1 & MPC52xx_PSC_MODE_PARODD ? 'o' : 'e'; -} - -static void -mpc52xx_console_write(struct console *co, const char *s, unsigned int count) -{ - struct uart_port *port = &mpc52xx_uart_ports[co->index]; - unsigned int i, j; - - /* Disable interrupts */ - psc_ops->cw_disable_ints(port); - - /* Wait the TX buffer to be empty */ - j = 5000000; /* Maximum wait */ - while (!mpc52xx_uart_tx_empty(port) && --j) - udelay(1); - - /* Write all the chars */ - for (i = 0; i < count; i++, s++) { - /* Line return handling */ - if (*s == '\n') - psc_ops->write_char(port, '\r'); - - /* Send the char */ - psc_ops->write_char(port, *s); - - /* Wait the TX buffer to be empty */ - j = 20000; /* Maximum wait */ - while (!mpc52xx_uart_tx_empty(port) && --j) - udelay(1); - } - - /* Restore interrupt state */ - psc_ops->cw_restore_ints(port); -} - - -static int __init -mpc52xx_console_setup(struct console *co, char *options) -{ - struct uart_port *port = &mpc52xx_uart_ports[co->index]; - struct device_node *np = mpc52xx_uart_nodes[co->index]; - unsigned int uartclk; - struct resource res; - int ret; - - int baud = CONFIG_SERIAL_MPC52xx_CONSOLE_BAUD; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - pr_debug("mpc52xx_console_setup co=%p, co->index=%i, options=%s\n", - co, co->index, options); - - if ((co->index < 0) || (co->index >= MPC52xx_PSC_MAXNUM)) { - pr_debug("PSC%x out of range\n", co->index); - return -EINVAL; - } - - if (!np) { - pr_debug("PSC%x not found in device tree\n", co->index); - return -EINVAL; - } - - pr_debug("Console on ttyPSC%x is %s\n", - co->index, mpc52xx_uart_nodes[co->index]->full_name); - - /* Fetch register locations */ - ret = of_address_to_resource(np, 0, &res); - if (ret) { - pr_debug("Could not get resources for PSC%x\n", co->index); - return ret; - } - - uartclk = mpc5xxx_get_bus_frequency(np); - if (uartclk == 0) { - pr_debug("Could not find uart clock frequency!\n"); - return -EINVAL; - } - - /* Basic port init. Needed since we use some uart_??? func before - * real init for early access */ - spin_lock_init(&port->lock); - port->uartclk = uartclk; - port->ops = &mpc52xx_uart_ops; - port->mapbase = res.start; - port->membase = ioremap(res.start, sizeof(struct mpc52xx_psc)); - port->irq = irq_of_parse_and_map(np, 0); - - if (port->membase == NULL) - return -EINVAL; - - pr_debug("mpc52xx-psc uart at %p, mapped to %p, irq=%x, freq=%i\n", - (void *)port->mapbase, port->membase, - port->irq, port->uartclk); - - /* Setup the port parameters accoding to options */ - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - else - mpc52xx_console_get_options(port, &baud, &parity, &bits, &flow); - - pr_debug("Setting console parameters: %i %i%c1 flow=%c\n", - baud, bits, parity, flow); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - - -static struct uart_driver mpc52xx_uart_driver; - -static struct console mpc52xx_console = { - .name = "ttyPSC", - .write = mpc52xx_console_write, - .device = uart_console_device, - .setup = mpc52xx_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, /* Specified on the cmdline (e.g. console=ttyPSC0) */ - .data = &mpc52xx_uart_driver, -}; - - -static int __init -mpc52xx_console_init(void) -{ - mpc52xx_uart_of_enumerate(); - register_console(&mpc52xx_console); - return 0; -} - -console_initcall(mpc52xx_console_init); - -#define MPC52xx_PSC_CONSOLE &mpc52xx_console -#else -#define MPC52xx_PSC_CONSOLE NULL -#endif - - -/* ======================================================================== */ -/* UART Driver */ -/* ======================================================================== */ - -static struct uart_driver mpc52xx_uart_driver = { - .driver_name = "mpc52xx_psc_uart", - .dev_name = "ttyPSC", - .major = SERIAL_PSC_MAJOR, - .minor = SERIAL_PSC_MINOR, - .nr = MPC52xx_PSC_MAXNUM, - .cons = MPC52xx_PSC_CONSOLE, -}; - -/* ======================================================================== */ -/* OF Platform Driver */ -/* ======================================================================== */ - -static struct of_device_id mpc52xx_uart_of_match[] = { -#ifdef CONFIG_PPC_MPC52xx - { .compatible = "fsl,mpc5200b-psc-uart", .data = &mpc5200b_psc_ops, }, - { .compatible = "fsl,mpc5200-psc-uart", .data = &mpc52xx_psc_ops, }, - /* binding used by old lite5200 device trees: */ - { .compatible = "mpc5200-psc-uart", .data = &mpc52xx_psc_ops, }, - /* binding used by efika: */ - { .compatible = "mpc5200-serial", .data = &mpc52xx_psc_ops, }, -#endif -#ifdef CONFIG_PPC_MPC512x - { .compatible = "fsl,mpc5121-psc-uart", .data = &mpc512x_psc_ops, }, -#endif - {}, -}; - -static int __devinit -mpc52xx_uart_of_probe(struct platform_device *op, const struct of_device_id *match) -{ - int idx = -1; - unsigned int uartclk; - struct uart_port *port = NULL; - struct resource res; - int ret; - - dev_dbg(&op->dev, "mpc52xx_uart_probe(op=%p, match=%p)\n", op, match); - - /* Check validity & presence */ - for (idx = 0; idx < MPC52xx_PSC_MAXNUM; idx++) - if (mpc52xx_uart_nodes[idx] == op->dev.of_node) - break; - if (idx >= MPC52xx_PSC_MAXNUM) - return -EINVAL; - pr_debug("Found %s assigned to ttyPSC%x\n", - mpc52xx_uart_nodes[idx]->full_name, idx); - - /* set the uart clock to the input clock of the psc, the different - * prescalers are taken into account in the set_baudrate() methods - * of the respective chip */ - uartclk = mpc5xxx_get_bus_frequency(op->dev.of_node); - if (uartclk == 0) { - dev_dbg(&op->dev, "Could not find uart clock frequency!\n"); - return -EINVAL; - } - - /* Init the port structure */ - port = &mpc52xx_uart_ports[idx]; - - spin_lock_init(&port->lock); - port->uartclk = uartclk; - port->fifosize = 512; - port->iotype = UPIO_MEM; - port->flags = UPF_BOOT_AUTOCONF | - (uart_console(port) ? 0 : UPF_IOREMAP); - port->line = idx; - port->ops = &mpc52xx_uart_ops; - port->dev = &op->dev; - - /* Search for IRQ and mapbase */ - ret = of_address_to_resource(op->dev.of_node, 0, &res); - if (ret) - return ret; - - port->mapbase = res.start; - if (!port->mapbase) { - dev_dbg(&op->dev, "Could not allocate resources for PSC\n"); - return -EINVAL; - } - - psc_ops->get_irq(port, op->dev.of_node); - if (port->irq == NO_IRQ) { - dev_dbg(&op->dev, "Could not get irq\n"); - return -EINVAL; - } - - dev_dbg(&op->dev, "mpc52xx-psc uart at %p, irq=%x, freq=%i\n", - (void *)port->mapbase, port->irq, port->uartclk); - - /* Add the port to the uart sub-system */ - ret = uart_add_one_port(&mpc52xx_uart_driver, port); - if (ret) - return ret; - - dev_set_drvdata(&op->dev, (void *)port); - return 0; -} - -static int -mpc52xx_uart_of_remove(struct platform_device *op) -{ - struct uart_port *port = dev_get_drvdata(&op->dev); - dev_set_drvdata(&op->dev, NULL); - - if (port) - uart_remove_one_port(&mpc52xx_uart_driver, port); - - return 0; -} - -#ifdef CONFIG_PM -static int -mpc52xx_uart_of_suspend(struct platform_device *op, pm_message_t state) -{ - struct uart_port *port = (struct uart_port *) dev_get_drvdata(&op->dev); - - if (port) - uart_suspend_port(&mpc52xx_uart_driver, port); - - return 0; -} - -static int -mpc52xx_uart_of_resume(struct platform_device *op) -{ - struct uart_port *port = (struct uart_port *) dev_get_drvdata(&op->dev); - - if (port) - uart_resume_port(&mpc52xx_uart_driver, port); - - return 0; -} -#endif - -static void -mpc52xx_uart_of_assign(struct device_node *np) -{ - int i; - - /* Find the first free PSC number */ - for (i = 0; i < MPC52xx_PSC_MAXNUM; i++) { - if (mpc52xx_uart_nodes[i] == NULL) { - of_node_get(np); - mpc52xx_uart_nodes[i] = np; - return; - } - } -} - -static void -mpc52xx_uart_of_enumerate(void) -{ - static int enum_done; - struct device_node *np; - const struct of_device_id *match; - int i; - - if (enum_done) - return; - - /* Assign index to each PSC in device tree */ - for_each_matching_node(np, mpc52xx_uart_of_match) { - match = of_match_node(mpc52xx_uart_of_match, np); - psc_ops = match->data; - mpc52xx_uart_of_assign(np); - } - - enum_done = 1; - - for (i = 0; i < MPC52xx_PSC_MAXNUM; i++) { - if (mpc52xx_uart_nodes[i]) - pr_debug("%s assigned to ttyPSC%x\n", - mpc52xx_uart_nodes[i]->full_name, i); - } -} - -MODULE_DEVICE_TABLE(of, mpc52xx_uart_of_match); - -static struct of_platform_driver mpc52xx_uart_of_driver = { - .probe = mpc52xx_uart_of_probe, - .remove = mpc52xx_uart_of_remove, -#ifdef CONFIG_PM - .suspend = mpc52xx_uart_of_suspend, - .resume = mpc52xx_uart_of_resume, -#endif - .driver = { - .name = "mpc52xx-psc-uart", - .owner = THIS_MODULE, - .of_match_table = mpc52xx_uart_of_match, - }, -}; - - -/* ======================================================================== */ -/* Module */ -/* ======================================================================== */ - -static int __init -mpc52xx_uart_init(void) -{ - int ret; - - printk(KERN_INFO "Serial: MPC52xx PSC UART driver\n"); - - ret = uart_register_driver(&mpc52xx_uart_driver); - if (ret) { - printk(KERN_ERR "%s: uart_register_driver failed (%i)\n", - __FILE__, ret); - return ret; - } - - mpc52xx_uart_of_enumerate(); - - /* - * Map the PSC FIFO Controller and init if on MPC512x. - */ - if (psc_ops && psc_ops->fifoc_init) { - ret = psc_ops->fifoc_init(); - if (ret) - return ret; - } - - ret = of_register_platform_driver(&mpc52xx_uart_of_driver); - if (ret) { - printk(KERN_ERR "%s: of_register_platform_driver failed (%i)\n", - __FILE__, ret); - uart_unregister_driver(&mpc52xx_uart_driver); - return ret; - } - - return 0; -} - -static void __exit -mpc52xx_uart_exit(void) -{ - if (psc_ops->fifoc_uninit) - psc_ops->fifoc_uninit(); - - of_unregister_platform_driver(&mpc52xx_uart_of_driver); - uart_unregister_driver(&mpc52xx_uart_driver); -} - - -module_init(mpc52xx_uart_init); -module_exit(mpc52xx_uart_exit); - -MODULE_AUTHOR("Sylvain Munaut <tnt@246tNt.com>"); -MODULE_DESCRIPTION("Freescale MPC52xx PSC UART"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/mpsc.c b/drivers/serial/mpsc.c deleted file mode 100644 index 6a9c6605666a..000000000000 --- a/drivers/serial/mpsc.c +++ /dev/null @@ -1,2159 +0,0 @@ -/* - * Generic driver for the MPSC (UART mode) on Marvell parts (e.g., GT64240, - * GT64260, MV64340, MV64360, GT96100, ... ). - * - * Author: Mark A. Greer <mgreer@mvista.com> - * - * Based on an old MPSC driver that was in the linuxppc tree. It appears to - * have been created by Chris Zankel (formerly of MontaVista) but there - * is no proper Copyright so I'm not sure. Apparently, parts were also - * taken from PPCBoot (now U-Boot). Also based on drivers/serial/8250.c - * by Russell King. - * - * 2004 (c) MontaVista, Software, Inc. This file is licensed under - * the terms of the GNU General Public License version 2. This program - * is licensed "as is" without any warranty of any kind, whether express - * or implied. - */ -/* - * The MPSC interface is much like a typical network controller's interface. - * That is, you set up separate rings of descriptors for transmitting and - * receiving data. There is also a pool of buffers with (one buffer per - * descriptor) that incoming data are dma'd into or outgoing data are dma'd - * out of. - * - * The MPSC requires two other controllers to be able to work. The Baud Rate - * Generator (BRG) provides a clock at programmable frequencies which determines - * the baud rate. The Serial DMA Controller (SDMA) takes incoming data from the - * MPSC and DMA's it into memory or DMA's outgoing data and passes it to the - * MPSC. It is actually the SDMA interrupt that the driver uses to keep the - * transmit and receive "engines" going (i.e., indicate data has been - * transmitted or received). - * - * NOTES: - * - * 1) Some chips have an erratum where several regs cannot be - * read. To work around that, we keep a local copy of those regs in - * 'mpsc_port_info'. - * - * 2) Some chips have an erratum where the ctlr will hang when the SDMA ctlr - * accesses system mem with coherency enabled. For that reason, the driver - * assumes that coherency for that ctlr has been disabled. This means - * that when in a cache coherent system, the driver has to manually manage - * the data cache on the areas that it touches because the dma_* macro are - * basically no-ops. - * - * 3) There is an erratum (on PPC) where you can't use the instruction to do - * a DMA_TO_DEVICE/cache clean so DMA_BIDIRECTIONAL/flushes are used in places - * where a DMA_TO_DEVICE/clean would have [otherwise] sufficed. - * - * 4) AFAICT, hardware flow control isn't supported by the controller --MAG. - */ - - -#if defined(CONFIG_SERIAL_MPSC_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/serial.h> -#include <linux/serial_core.h> -#include <linux/delay.h> -#include <linux/device.h> -#include <linux/dma-mapping.h> -#include <linux/mv643xx.h> -#include <linux/platform_device.h> -#include <linux/gfp.h> - -#include <asm/io.h> -#include <asm/irq.h> - -#define MPSC_NUM_CTLRS 2 - -/* - * Descriptors and buffers must be cache line aligned. - * Buffers lengths must be multiple of cache line size. - * Number of Tx & Rx descriptors must be powers of 2. - */ -#define MPSC_RXR_ENTRIES 32 -#define MPSC_RXRE_SIZE dma_get_cache_alignment() -#define MPSC_RXR_SIZE (MPSC_RXR_ENTRIES * MPSC_RXRE_SIZE) -#define MPSC_RXBE_SIZE dma_get_cache_alignment() -#define MPSC_RXB_SIZE (MPSC_RXR_ENTRIES * MPSC_RXBE_SIZE) - -#define MPSC_TXR_ENTRIES 32 -#define MPSC_TXRE_SIZE dma_get_cache_alignment() -#define MPSC_TXR_SIZE (MPSC_TXR_ENTRIES * MPSC_TXRE_SIZE) -#define MPSC_TXBE_SIZE dma_get_cache_alignment() -#define MPSC_TXB_SIZE (MPSC_TXR_ENTRIES * MPSC_TXBE_SIZE) - -#define MPSC_DMA_ALLOC_SIZE (MPSC_RXR_SIZE + MPSC_RXB_SIZE + MPSC_TXR_SIZE \ - + MPSC_TXB_SIZE + dma_get_cache_alignment() /* for alignment */) - -/* Rx and Tx Ring entry descriptors -- assume entry size is <= cacheline size */ -struct mpsc_rx_desc { - u16 bufsize; - u16 bytecnt; - u32 cmdstat; - u32 link; - u32 buf_ptr; -} __attribute((packed)); - -struct mpsc_tx_desc { - u16 bytecnt; - u16 shadow; - u32 cmdstat; - u32 link; - u32 buf_ptr; -} __attribute((packed)); - -/* - * Some regs that have the erratum that you can't read them are are shared - * between the two MPSC controllers. This struct contains those shared regs. - */ -struct mpsc_shared_regs { - phys_addr_t mpsc_routing_base_p; - phys_addr_t sdma_intr_base_p; - - void __iomem *mpsc_routing_base; - void __iomem *sdma_intr_base; - - u32 MPSC_MRR_m; - u32 MPSC_RCRR_m; - u32 MPSC_TCRR_m; - u32 SDMA_INTR_CAUSE_m; - u32 SDMA_INTR_MASK_m; -}; - -/* The main driver data structure */ -struct mpsc_port_info { - struct uart_port port; /* Overlay uart_port structure */ - - /* Internal driver state for this ctlr */ - u8 ready; - u8 rcv_data; - tcflag_t c_iflag; /* save termios->c_iflag */ - tcflag_t c_cflag; /* save termios->c_cflag */ - - /* Info passed in from platform */ - u8 mirror_regs; /* Need to mirror regs? */ - u8 cache_mgmt; /* Need manual cache mgmt? */ - u8 brg_can_tune; /* BRG has baud tuning? */ - u32 brg_clk_src; - u16 mpsc_max_idle; - int default_baud; - int default_bits; - int default_parity; - int default_flow; - - /* Physical addresses of various blocks of registers (from platform) */ - phys_addr_t mpsc_base_p; - phys_addr_t sdma_base_p; - phys_addr_t brg_base_p; - - /* Virtual addresses of various blocks of registers (from platform) */ - void __iomem *mpsc_base; - void __iomem *sdma_base; - void __iomem *brg_base; - - /* Descriptor ring and buffer allocations */ - void *dma_region; - dma_addr_t dma_region_p; - - dma_addr_t rxr; /* Rx descriptor ring */ - dma_addr_t rxr_p; /* Phys addr of rxr */ - u8 *rxb; /* Rx Ring I/O buf */ - u8 *rxb_p; /* Phys addr of rxb */ - u32 rxr_posn; /* First desc w/ Rx data */ - - dma_addr_t txr; /* Tx descriptor ring */ - dma_addr_t txr_p; /* Phys addr of txr */ - u8 *txb; /* Tx Ring I/O buf */ - u8 *txb_p; /* Phys addr of txb */ - int txr_head; /* Where new data goes */ - int txr_tail; /* Where sent data comes off */ - spinlock_t tx_lock; /* transmit lock */ - - /* Mirrored values of regs we can't read (if 'mirror_regs' set) */ - u32 MPSC_MPCR_m; - u32 MPSC_CHR_1_m; - u32 MPSC_CHR_2_m; - u32 MPSC_CHR_10_m; - u32 BRG_BCR_m; - struct mpsc_shared_regs *shared_regs; -}; - -/* Hooks to platform-specific code */ -int mpsc_platform_register_driver(void); -void mpsc_platform_unregister_driver(void); - -/* Hooks back in to mpsc common to be called by platform-specific code */ -struct mpsc_port_info *mpsc_device_probe(int index); -struct mpsc_port_info *mpsc_device_remove(int index); - -/* Main MPSC Configuration Register Offsets */ -#define MPSC_MMCRL 0x0000 -#define MPSC_MMCRH 0x0004 -#define MPSC_MPCR 0x0008 -#define MPSC_CHR_1 0x000c -#define MPSC_CHR_2 0x0010 -#define MPSC_CHR_3 0x0014 -#define MPSC_CHR_4 0x0018 -#define MPSC_CHR_5 0x001c -#define MPSC_CHR_6 0x0020 -#define MPSC_CHR_7 0x0024 -#define MPSC_CHR_8 0x0028 -#define MPSC_CHR_9 0x002c -#define MPSC_CHR_10 0x0030 -#define MPSC_CHR_11 0x0034 - -#define MPSC_MPCR_FRZ (1 << 9) -#define MPSC_MPCR_CL_5 0 -#define MPSC_MPCR_CL_6 1 -#define MPSC_MPCR_CL_7 2 -#define MPSC_MPCR_CL_8 3 -#define MPSC_MPCR_SBL_1 0 -#define MPSC_MPCR_SBL_2 1 - -#define MPSC_CHR_2_TEV (1<<1) -#define MPSC_CHR_2_TA (1<<7) -#define MPSC_CHR_2_TTCS (1<<9) -#define MPSC_CHR_2_REV (1<<17) -#define MPSC_CHR_2_RA (1<<23) -#define MPSC_CHR_2_CRD (1<<25) -#define MPSC_CHR_2_EH (1<<31) -#define MPSC_CHR_2_PAR_ODD 0 -#define MPSC_CHR_2_PAR_SPACE 1 -#define MPSC_CHR_2_PAR_EVEN 2 -#define MPSC_CHR_2_PAR_MARK 3 - -/* MPSC Signal Routing */ -#define MPSC_MRR 0x0000 -#define MPSC_RCRR 0x0004 -#define MPSC_TCRR 0x0008 - -/* Serial DMA Controller Interface Registers */ -#define SDMA_SDC 0x0000 -#define SDMA_SDCM 0x0008 -#define SDMA_RX_DESC 0x0800 -#define SDMA_RX_BUF_PTR 0x0808 -#define SDMA_SCRDP 0x0810 -#define SDMA_TX_DESC 0x0c00 -#define SDMA_SCTDP 0x0c10 -#define SDMA_SFTDP 0x0c14 - -#define SDMA_DESC_CMDSTAT_PE (1<<0) -#define SDMA_DESC_CMDSTAT_CDL (1<<1) -#define SDMA_DESC_CMDSTAT_FR (1<<3) -#define SDMA_DESC_CMDSTAT_OR (1<<6) -#define SDMA_DESC_CMDSTAT_BR (1<<9) -#define SDMA_DESC_CMDSTAT_MI (1<<10) -#define SDMA_DESC_CMDSTAT_A (1<<11) -#define SDMA_DESC_CMDSTAT_AM (1<<12) -#define SDMA_DESC_CMDSTAT_CT (1<<13) -#define SDMA_DESC_CMDSTAT_C (1<<14) -#define SDMA_DESC_CMDSTAT_ES (1<<15) -#define SDMA_DESC_CMDSTAT_L (1<<16) -#define SDMA_DESC_CMDSTAT_F (1<<17) -#define SDMA_DESC_CMDSTAT_P (1<<18) -#define SDMA_DESC_CMDSTAT_EI (1<<23) -#define SDMA_DESC_CMDSTAT_O (1<<31) - -#define SDMA_DESC_DFLT (SDMA_DESC_CMDSTAT_O \ - | SDMA_DESC_CMDSTAT_EI) - -#define SDMA_SDC_RFT (1<<0) -#define SDMA_SDC_SFM (1<<1) -#define SDMA_SDC_BLMR (1<<6) -#define SDMA_SDC_BLMT (1<<7) -#define SDMA_SDC_POVR (1<<8) -#define SDMA_SDC_RIFB (1<<9) - -#define SDMA_SDCM_ERD (1<<7) -#define SDMA_SDCM_AR (1<<15) -#define SDMA_SDCM_STD (1<<16) -#define SDMA_SDCM_TXD (1<<23) -#define SDMA_SDCM_AT (1<<31) - -#define SDMA_0_CAUSE_RXBUF (1<<0) -#define SDMA_0_CAUSE_RXERR (1<<1) -#define SDMA_0_CAUSE_TXBUF (1<<2) -#define SDMA_0_CAUSE_TXEND (1<<3) -#define SDMA_1_CAUSE_RXBUF (1<<8) -#define SDMA_1_CAUSE_RXERR (1<<9) -#define SDMA_1_CAUSE_TXBUF (1<<10) -#define SDMA_1_CAUSE_TXEND (1<<11) - -#define SDMA_CAUSE_RX_MASK (SDMA_0_CAUSE_RXBUF | SDMA_0_CAUSE_RXERR \ - | SDMA_1_CAUSE_RXBUF | SDMA_1_CAUSE_RXERR) -#define SDMA_CAUSE_TX_MASK (SDMA_0_CAUSE_TXBUF | SDMA_0_CAUSE_TXEND \ - | SDMA_1_CAUSE_TXBUF | SDMA_1_CAUSE_TXEND) - -/* SDMA Interrupt registers */ -#define SDMA_INTR_CAUSE 0x0000 -#define SDMA_INTR_MASK 0x0080 - -/* Baud Rate Generator Interface Registers */ -#define BRG_BCR 0x0000 -#define BRG_BTR 0x0004 - -/* - * Define how this driver is known to the outside (we've been assigned a - * range on the "Low-density serial ports" major). - */ -#define MPSC_MAJOR 204 -#define MPSC_MINOR_START 44 -#define MPSC_DRIVER_NAME "MPSC" -#define MPSC_DEV_NAME "ttyMM" -#define MPSC_VERSION "1.00" - -static struct mpsc_port_info mpsc_ports[MPSC_NUM_CTLRS]; -static struct mpsc_shared_regs mpsc_shared_regs; -static struct uart_driver mpsc_reg; - -static void mpsc_start_rx(struct mpsc_port_info *pi); -static void mpsc_free_ring_mem(struct mpsc_port_info *pi); -static void mpsc_release_port(struct uart_port *port); -/* - ****************************************************************************** - * - * Baud Rate Generator Routines (BRG) - * - ****************************************************************************** - */ -static void mpsc_brg_init(struct mpsc_port_info *pi, u32 clk_src) -{ - u32 v; - - v = (pi->mirror_regs) ? pi->BRG_BCR_m : readl(pi->brg_base + BRG_BCR); - v = (v & ~(0xf << 18)) | ((clk_src & 0xf) << 18); - - if (pi->brg_can_tune) - v &= ~(1 << 25); - - if (pi->mirror_regs) - pi->BRG_BCR_m = v; - writel(v, pi->brg_base + BRG_BCR); - - writel(readl(pi->brg_base + BRG_BTR) & 0xffff0000, - pi->brg_base + BRG_BTR); -} - -static void mpsc_brg_enable(struct mpsc_port_info *pi) -{ - u32 v; - - v = (pi->mirror_regs) ? pi->BRG_BCR_m : readl(pi->brg_base + BRG_BCR); - v |= (1 << 16); - - if (pi->mirror_regs) - pi->BRG_BCR_m = v; - writel(v, pi->brg_base + BRG_BCR); -} - -static void mpsc_brg_disable(struct mpsc_port_info *pi) -{ - u32 v; - - v = (pi->mirror_regs) ? pi->BRG_BCR_m : readl(pi->brg_base + BRG_BCR); - v &= ~(1 << 16); - - if (pi->mirror_regs) - pi->BRG_BCR_m = v; - writel(v, pi->brg_base + BRG_BCR); -} - -/* - * To set the baud, we adjust the CDV field in the BRG_BCR reg. - * From manual: Baud = clk / ((CDV+1)*2) ==> CDV = (clk / (baud*2)) - 1. - * However, the input clock is divided by 16 in the MPSC b/c of how - * 'MPSC_MMCRH' was set up so we have to divide the 'clk' used in our - * calculation by 16 to account for that. So the real calculation - * that accounts for the way the mpsc is set up is: - * CDV = (clk / (baud*2*16)) - 1 ==> CDV = (clk / (baud << 5)) - 1. - */ -static void mpsc_set_baudrate(struct mpsc_port_info *pi, u32 baud) -{ - u32 cdv = (pi->port.uartclk / (baud << 5)) - 1; - u32 v; - - mpsc_brg_disable(pi); - v = (pi->mirror_regs) ? pi->BRG_BCR_m : readl(pi->brg_base + BRG_BCR); - v = (v & 0xffff0000) | (cdv & 0xffff); - - if (pi->mirror_regs) - pi->BRG_BCR_m = v; - writel(v, pi->brg_base + BRG_BCR); - mpsc_brg_enable(pi); -} - -/* - ****************************************************************************** - * - * Serial DMA Routines (SDMA) - * - ****************************************************************************** - */ - -static void mpsc_sdma_burstsize(struct mpsc_port_info *pi, u32 burst_size) -{ - u32 v; - - pr_debug("mpsc_sdma_burstsize[%d]: burst_size: %d\n", - pi->port.line, burst_size); - - burst_size >>= 3; /* Divide by 8 b/c reg values are 8-byte chunks */ - - if (burst_size < 2) - v = 0x0; /* 1 64-bit word */ - else if (burst_size < 4) - v = 0x1; /* 2 64-bit words */ - else if (burst_size < 8) - v = 0x2; /* 4 64-bit words */ - else - v = 0x3; /* 8 64-bit words */ - - writel((readl(pi->sdma_base + SDMA_SDC) & (0x3 << 12)) | (v << 12), - pi->sdma_base + SDMA_SDC); -} - -static void mpsc_sdma_init(struct mpsc_port_info *pi, u32 burst_size) -{ - pr_debug("mpsc_sdma_init[%d]: burst_size: %d\n", pi->port.line, - burst_size); - - writel((readl(pi->sdma_base + SDMA_SDC) & 0x3ff) | 0x03f, - pi->sdma_base + SDMA_SDC); - mpsc_sdma_burstsize(pi, burst_size); -} - -static u32 mpsc_sdma_intr_mask(struct mpsc_port_info *pi, u32 mask) -{ - u32 old, v; - - pr_debug("mpsc_sdma_intr_mask[%d]: mask: 0x%x\n", pi->port.line, mask); - - old = v = (pi->mirror_regs) ? pi->shared_regs->SDMA_INTR_MASK_m : - readl(pi->shared_regs->sdma_intr_base + SDMA_INTR_MASK); - - mask &= 0xf; - if (pi->port.line) - mask <<= 8; - v &= ~mask; - - if (pi->mirror_regs) - pi->shared_regs->SDMA_INTR_MASK_m = v; - writel(v, pi->shared_regs->sdma_intr_base + SDMA_INTR_MASK); - - if (pi->port.line) - old >>= 8; - return old & 0xf; -} - -static void mpsc_sdma_intr_unmask(struct mpsc_port_info *pi, u32 mask) -{ - u32 v; - - pr_debug("mpsc_sdma_intr_unmask[%d]: mask: 0x%x\n", pi->port.line,mask); - - v = (pi->mirror_regs) ? pi->shared_regs->SDMA_INTR_MASK_m - : readl(pi->shared_regs->sdma_intr_base + SDMA_INTR_MASK); - - mask &= 0xf; - if (pi->port.line) - mask <<= 8; - v |= mask; - - if (pi->mirror_regs) - pi->shared_regs->SDMA_INTR_MASK_m = v; - writel(v, pi->shared_regs->sdma_intr_base + SDMA_INTR_MASK); -} - -static void mpsc_sdma_intr_ack(struct mpsc_port_info *pi) -{ - pr_debug("mpsc_sdma_intr_ack[%d]: Acknowledging IRQ\n", pi->port.line); - - if (pi->mirror_regs) - pi->shared_regs->SDMA_INTR_CAUSE_m = 0; - writeb(0x00, pi->shared_regs->sdma_intr_base + SDMA_INTR_CAUSE - + pi->port.line); -} - -static void mpsc_sdma_set_rx_ring(struct mpsc_port_info *pi, - struct mpsc_rx_desc *rxre_p) -{ - pr_debug("mpsc_sdma_set_rx_ring[%d]: rxre_p: 0x%x\n", - pi->port.line, (u32)rxre_p); - - writel((u32)rxre_p, pi->sdma_base + SDMA_SCRDP); -} - -static void mpsc_sdma_set_tx_ring(struct mpsc_port_info *pi, - struct mpsc_tx_desc *txre_p) -{ - writel((u32)txre_p, pi->sdma_base + SDMA_SFTDP); - writel((u32)txre_p, pi->sdma_base + SDMA_SCTDP); -} - -static void mpsc_sdma_cmd(struct mpsc_port_info *pi, u32 val) -{ - u32 v; - - v = readl(pi->sdma_base + SDMA_SDCM); - if (val) - v |= val; - else - v = 0; - wmb(); - writel(v, pi->sdma_base + SDMA_SDCM); - wmb(); -} - -static uint mpsc_sdma_tx_active(struct mpsc_port_info *pi) -{ - return readl(pi->sdma_base + SDMA_SDCM) & SDMA_SDCM_TXD; -} - -static void mpsc_sdma_start_tx(struct mpsc_port_info *pi) -{ - struct mpsc_tx_desc *txre, *txre_p; - - /* If tx isn't running & there's a desc ready to go, start it */ - if (!mpsc_sdma_tx_active(pi)) { - txre = (struct mpsc_tx_desc *)(pi->txr - + (pi->txr_tail * MPSC_TXRE_SIZE)); - dma_cache_sync(pi->port.dev, (void *)txre, MPSC_TXRE_SIZE, - DMA_FROM_DEVICE); -#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) - if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ - invalidate_dcache_range((ulong)txre, - (ulong)txre + MPSC_TXRE_SIZE); -#endif - - if (be32_to_cpu(txre->cmdstat) & SDMA_DESC_CMDSTAT_O) { - txre_p = (struct mpsc_tx_desc *) - (pi->txr_p + (pi->txr_tail * MPSC_TXRE_SIZE)); - - mpsc_sdma_set_tx_ring(pi, txre_p); - mpsc_sdma_cmd(pi, SDMA_SDCM_STD | SDMA_SDCM_TXD); - } - } -} - -static void mpsc_sdma_stop(struct mpsc_port_info *pi) -{ - pr_debug("mpsc_sdma_stop[%d]: Stopping SDMA\n", pi->port.line); - - /* Abort any SDMA transfers */ - mpsc_sdma_cmd(pi, 0); - mpsc_sdma_cmd(pi, SDMA_SDCM_AR | SDMA_SDCM_AT); - - /* Clear the SDMA current and first TX and RX pointers */ - mpsc_sdma_set_tx_ring(pi, NULL); - mpsc_sdma_set_rx_ring(pi, NULL); - - /* Disable interrupts */ - mpsc_sdma_intr_mask(pi, 0xf); - mpsc_sdma_intr_ack(pi); -} - -/* - ****************************************************************************** - * - * Multi-Protocol Serial Controller Routines (MPSC) - * - ****************************************************************************** - */ - -static void mpsc_hw_init(struct mpsc_port_info *pi) -{ - u32 v; - - pr_debug("mpsc_hw_init[%d]: Initializing hardware\n", pi->port.line); - - /* Set up clock routing */ - if (pi->mirror_regs) { - v = pi->shared_regs->MPSC_MRR_m; - v &= ~0x1c7; - pi->shared_regs->MPSC_MRR_m = v; - writel(v, pi->shared_regs->mpsc_routing_base + MPSC_MRR); - - v = pi->shared_regs->MPSC_RCRR_m; - v = (v & ~0xf0f) | 0x100; - pi->shared_regs->MPSC_RCRR_m = v; - writel(v, pi->shared_regs->mpsc_routing_base + MPSC_RCRR); - - v = pi->shared_regs->MPSC_TCRR_m; - v = (v & ~0xf0f) | 0x100; - pi->shared_regs->MPSC_TCRR_m = v; - writel(v, pi->shared_regs->mpsc_routing_base + MPSC_TCRR); - } else { - v = readl(pi->shared_regs->mpsc_routing_base + MPSC_MRR); - v &= ~0x1c7; - writel(v, pi->shared_regs->mpsc_routing_base + MPSC_MRR); - - v = readl(pi->shared_regs->mpsc_routing_base + MPSC_RCRR); - v = (v & ~0xf0f) | 0x100; - writel(v, pi->shared_regs->mpsc_routing_base + MPSC_RCRR); - - v = readl(pi->shared_regs->mpsc_routing_base + MPSC_TCRR); - v = (v & ~0xf0f) | 0x100; - writel(v, pi->shared_regs->mpsc_routing_base + MPSC_TCRR); - } - - /* Put MPSC in UART mode & enabel Tx/Rx egines */ - writel(0x000004c4, pi->mpsc_base + MPSC_MMCRL); - - /* No preamble, 16x divider, low-latency, */ - writel(0x04400400, pi->mpsc_base + MPSC_MMCRH); - mpsc_set_baudrate(pi, pi->default_baud); - - if (pi->mirror_regs) { - pi->MPSC_CHR_1_m = 0; - pi->MPSC_CHR_2_m = 0; - } - writel(0, pi->mpsc_base + MPSC_CHR_1); - writel(0, pi->mpsc_base + MPSC_CHR_2); - writel(pi->mpsc_max_idle, pi->mpsc_base + MPSC_CHR_3); - writel(0, pi->mpsc_base + MPSC_CHR_4); - writel(0, pi->mpsc_base + MPSC_CHR_5); - writel(0, pi->mpsc_base + MPSC_CHR_6); - writel(0, pi->mpsc_base + MPSC_CHR_7); - writel(0, pi->mpsc_base + MPSC_CHR_8); - writel(0, pi->mpsc_base + MPSC_CHR_9); - writel(0, pi->mpsc_base + MPSC_CHR_10); -} - -static void mpsc_enter_hunt(struct mpsc_port_info *pi) -{ - pr_debug("mpsc_enter_hunt[%d]: Hunting...\n", pi->port.line); - - if (pi->mirror_regs) { - writel(pi->MPSC_CHR_2_m | MPSC_CHR_2_EH, - pi->mpsc_base + MPSC_CHR_2); - /* Erratum prevents reading CHR_2 so just delay for a while */ - udelay(100); - } else { - writel(readl(pi->mpsc_base + MPSC_CHR_2) | MPSC_CHR_2_EH, - pi->mpsc_base + MPSC_CHR_2); - - while (readl(pi->mpsc_base + MPSC_CHR_2) & MPSC_CHR_2_EH) - udelay(10); - } -} - -static void mpsc_freeze(struct mpsc_port_info *pi) -{ - u32 v; - - pr_debug("mpsc_freeze[%d]: Freezing\n", pi->port.line); - - v = (pi->mirror_regs) ? pi->MPSC_MPCR_m : - readl(pi->mpsc_base + MPSC_MPCR); - v |= MPSC_MPCR_FRZ; - - if (pi->mirror_regs) - pi->MPSC_MPCR_m = v; - writel(v, pi->mpsc_base + MPSC_MPCR); -} - -static void mpsc_unfreeze(struct mpsc_port_info *pi) -{ - u32 v; - - v = (pi->mirror_regs) ? pi->MPSC_MPCR_m : - readl(pi->mpsc_base + MPSC_MPCR); - v &= ~MPSC_MPCR_FRZ; - - if (pi->mirror_regs) - pi->MPSC_MPCR_m = v; - writel(v, pi->mpsc_base + MPSC_MPCR); - - pr_debug("mpsc_unfreeze[%d]: Unfrozen\n", pi->port.line); -} - -static void mpsc_set_char_length(struct mpsc_port_info *pi, u32 len) -{ - u32 v; - - pr_debug("mpsc_set_char_length[%d]: char len: %d\n", pi->port.line,len); - - v = (pi->mirror_regs) ? pi->MPSC_MPCR_m : - readl(pi->mpsc_base + MPSC_MPCR); - v = (v & ~(0x3 << 12)) | ((len & 0x3) << 12); - - if (pi->mirror_regs) - pi->MPSC_MPCR_m = v; - writel(v, pi->mpsc_base + MPSC_MPCR); -} - -static void mpsc_set_stop_bit_length(struct mpsc_port_info *pi, u32 len) -{ - u32 v; - - pr_debug("mpsc_set_stop_bit_length[%d]: stop bits: %d\n", - pi->port.line, len); - - v = (pi->mirror_regs) ? pi->MPSC_MPCR_m : - readl(pi->mpsc_base + MPSC_MPCR); - - v = (v & ~(1 << 14)) | ((len & 0x1) << 14); - - if (pi->mirror_regs) - pi->MPSC_MPCR_m = v; - writel(v, pi->mpsc_base + MPSC_MPCR); -} - -static void mpsc_set_parity(struct mpsc_port_info *pi, u32 p) -{ - u32 v; - - pr_debug("mpsc_set_parity[%d]: parity bits: 0x%x\n", pi->port.line, p); - - v = (pi->mirror_regs) ? pi->MPSC_CHR_2_m : - readl(pi->mpsc_base + MPSC_CHR_2); - - p &= 0x3; - v = (v & ~0xc000c) | (p << 18) | (p << 2); - - if (pi->mirror_regs) - pi->MPSC_CHR_2_m = v; - writel(v, pi->mpsc_base + MPSC_CHR_2); -} - -/* - ****************************************************************************** - * - * Driver Init Routines - * - ****************************************************************************** - */ - -static void mpsc_init_hw(struct mpsc_port_info *pi) -{ - pr_debug("mpsc_init_hw[%d]: Initializing\n", pi->port.line); - - mpsc_brg_init(pi, pi->brg_clk_src); - mpsc_brg_enable(pi); - mpsc_sdma_init(pi, dma_get_cache_alignment()); /* burst a cacheline */ - mpsc_sdma_stop(pi); - mpsc_hw_init(pi); -} - -static int mpsc_alloc_ring_mem(struct mpsc_port_info *pi) -{ - int rc = 0; - - pr_debug("mpsc_alloc_ring_mem[%d]: Allocating ring mem\n", - pi->port.line); - - if (!pi->dma_region) { - if (!dma_supported(pi->port.dev, 0xffffffff)) { - printk(KERN_ERR "MPSC: Inadequate DMA support\n"); - rc = -ENXIO; - } else if ((pi->dma_region = dma_alloc_noncoherent(pi->port.dev, - MPSC_DMA_ALLOC_SIZE, - &pi->dma_region_p, GFP_KERNEL)) - == NULL) { - printk(KERN_ERR "MPSC: Can't alloc Desc region\n"); - rc = -ENOMEM; - } - } - - return rc; -} - -static void mpsc_free_ring_mem(struct mpsc_port_info *pi) -{ - pr_debug("mpsc_free_ring_mem[%d]: Freeing ring mem\n", pi->port.line); - - if (pi->dma_region) { - dma_free_noncoherent(pi->port.dev, MPSC_DMA_ALLOC_SIZE, - pi->dma_region, pi->dma_region_p); - pi->dma_region = NULL; - pi->dma_region_p = (dma_addr_t)NULL; - } -} - -static void mpsc_init_rings(struct mpsc_port_info *pi) -{ - struct mpsc_rx_desc *rxre; - struct mpsc_tx_desc *txre; - dma_addr_t dp, dp_p; - u8 *bp, *bp_p; - int i; - - pr_debug("mpsc_init_rings[%d]: Initializing rings\n", pi->port.line); - - BUG_ON(pi->dma_region == NULL); - - memset(pi->dma_region, 0, MPSC_DMA_ALLOC_SIZE); - - /* - * Descriptors & buffers are multiples of cacheline size and must be - * cacheline aligned. - */ - dp = ALIGN((u32)pi->dma_region, dma_get_cache_alignment()); - dp_p = ALIGN((u32)pi->dma_region_p, dma_get_cache_alignment()); - - /* - * Partition dma region into rx ring descriptor, rx buffers, - * tx ring descriptors, and tx buffers. - */ - pi->rxr = dp; - pi->rxr_p = dp_p; - dp += MPSC_RXR_SIZE; - dp_p += MPSC_RXR_SIZE; - - pi->rxb = (u8 *)dp; - pi->rxb_p = (u8 *)dp_p; - dp += MPSC_RXB_SIZE; - dp_p += MPSC_RXB_SIZE; - - pi->rxr_posn = 0; - - pi->txr = dp; - pi->txr_p = dp_p; - dp += MPSC_TXR_SIZE; - dp_p += MPSC_TXR_SIZE; - - pi->txb = (u8 *)dp; - pi->txb_p = (u8 *)dp_p; - - pi->txr_head = 0; - pi->txr_tail = 0; - - /* Init rx ring descriptors */ - dp = pi->rxr; - dp_p = pi->rxr_p; - bp = pi->rxb; - bp_p = pi->rxb_p; - - for (i = 0; i < MPSC_RXR_ENTRIES; i++) { - rxre = (struct mpsc_rx_desc *)dp; - - rxre->bufsize = cpu_to_be16(MPSC_RXBE_SIZE); - rxre->bytecnt = cpu_to_be16(0); - rxre->cmdstat = cpu_to_be32(SDMA_DESC_CMDSTAT_O - | SDMA_DESC_CMDSTAT_EI | SDMA_DESC_CMDSTAT_F - | SDMA_DESC_CMDSTAT_L); - rxre->link = cpu_to_be32(dp_p + MPSC_RXRE_SIZE); - rxre->buf_ptr = cpu_to_be32(bp_p); - - dp += MPSC_RXRE_SIZE; - dp_p += MPSC_RXRE_SIZE; - bp += MPSC_RXBE_SIZE; - bp_p += MPSC_RXBE_SIZE; - } - rxre->link = cpu_to_be32(pi->rxr_p); /* Wrap last back to first */ - - /* Init tx ring descriptors */ - dp = pi->txr; - dp_p = pi->txr_p; - bp = pi->txb; - bp_p = pi->txb_p; - - for (i = 0; i < MPSC_TXR_ENTRIES; i++) { - txre = (struct mpsc_tx_desc *)dp; - - txre->link = cpu_to_be32(dp_p + MPSC_TXRE_SIZE); - txre->buf_ptr = cpu_to_be32(bp_p); - - dp += MPSC_TXRE_SIZE; - dp_p += MPSC_TXRE_SIZE; - bp += MPSC_TXBE_SIZE; - bp_p += MPSC_TXBE_SIZE; - } - txre->link = cpu_to_be32(pi->txr_p); /* Wrap last back to first */ - - dma_cache_sync(pi->port.dev, (void *)pi->dma_region, - MPSC_DMA_ALLOC_SIZE, DMA_BIDIRECTIONAL); -#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) - if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ - flush_dcache_range((ulong)pi->dma_region, - (ulong)pi->dma_region - + MPSC_DMA_ALLOC_SIZE); -#endif - - return; -} - -static void mpsc_uninit_rings(struct mpsc_port_info *pi) -{ - pr_debug("mpsc_uninit_rings[%d]: Uninitializing rings\n",pi->port.line); - - BUG_ON(pi->dma_region == NULL); - - pi->rxr = 0; - pi->rxr_p = 0; - pi->rxb = NULL; - pi->rxb_p = NULL; - pi->rxr_posn = 0; - - pi->txr = 0; - pi->txr_p = 0; - pi->txb = NULL; - pi->txb_p = NULL; - pi->txr_head = 0; - pi->txr_tail = 0; -} - -static int mpsc_make_ready(struct mpsc_port_info *pi) -{ - int rc; - - pr_debug("mpsc_make_ready[%d]: Making cltr ready\n", pi->port.line); - - if (!pi->ready) { - mpsc_init_hw(pi); - if ((rc = mpsc_alloc_ring_mem(pi))) - return rc; - mpsc_init_rings(pi); - pi->ready = 1; - } - - return 0; -} - -#ifdef CONFIG_CONSOLE_POLL -static int serial_polled; -#endif - -/* - ****************************************************************************** - * - * Interrupt Handling Routines - * - ****************************************************************************** - */ - -static int mpsc_rx_intr(struct mpsc_port_info *pi) -{ - struct mpsc_rx_desc *rxre; - struct tty_struct *tty = pi->port.state->port.tty; - u32 cmdstat, bytes_in, i; - int rc = 0; - u8 *bp; - char flag = TTY_NORMAL; - - pr_debug("mpsc_rx_intr[%d]: Handling Rx intr\n", pi->port.line); - - rxre = (struct mpsc_rx_desc *)(pi->rxr + (pi->rxr_posn*MPSC_RXRE_SIZE)); - - dma_cache_sync(pi->port.dev, (void *)rxre, MPSC_RXRE_SIZE, - DMA_FROM_DEVICE); -#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) - if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ - invalidate_dcache_range((ulong)rxre, - (ulong)rxre + MPSC_RXRE_SIZE); -#endif - - /* - * Loop through Rx descriptors handling ones that have been completed. - */ - while (!((cmdstat = be32_to_cpu(rxre->cmdstat)) - & SDMA_DESC_CMDSTAT_O)) { - bytes_in = be16_to_cpu(rxre->bytecnt); -#ifdef CONFIG_CONSOLE_POLL - if (unlikely(serial_polled)) { - serial_polled = 0; - return 0; - } -#endif - /* Following use of tty struct directly is deprecated */ - if (unlikely(tty_buffer_request_room(tty, bytes_in) - < bytes_in)) { - if (tty->low_latency) - tty_flip_buffer_push(tty); - /* - * If this failed then we will throw away the bytes - * but must do so to clear interrupts. - */ - } - - bp = pi->rxb + (pi->rxr_posn * MPSC_RXBE_SIZE); - dma_cache_sync(pi->port.dev, (void *)bp, MPSC_RXBE_SIZE, - DMA_FROM_DEVICE); -#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) - if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ - invalidate_dcache_range((ulong)bp, - (ulong)bp + MPSC_RXBE_SIZE); -#endif - - /* - * Other than for parity error, the manual provides little - * info on what data will be in a frame flagged by any of - * these errors. For parity error, it is the last byte in - * the buffer that had the error. As for the rest, I guess - * we'll assume there is no data in the buffer. - * If there is...it gets lost. - */ - if (unlikely(cmdstat & (SDMA_DESC_CMDSTAT_BR - | SDMA_DESC_CMDSTAT_FR - | SDMA_DESC_CMDSTAT_OR))) { - - pi->port.icount.rx++; - - if (cmdstat & SDMA_DESC_CMDSTAT_BR) { /* Break */ - pi->port.icount.brk++; - - if (uart_handle_break(&pi->port)) - goto next_frame; - } else if (cmdstat & SDMA_DESC_CMDSTAT_FR) { - pi->port.icount.frame++; - } else if (cmdstat & SDMA_DESC_CMDSTAT_OR) { - pi->port.icount.overrun++; - } - - cmdstat &= pi->port.read_status_mask; - - if (cmdstat & SDMA_DESC_CMDSTAT_BR) - flag = TTY_BREAK; - else if (cmdstat & SDMA_DESC_CMDSTAT_FR) - flag = TTY_FRAME; - else if (cmdstat & SDMA_DESC_CMDSTAT_OR) - flag = TTY_OVERRUN; - else if (cmdstat & SDMA_DESC_CMDSTAT_PE) - flag = TTY_PARITY; - } - - if (uart_handle_sysrq_char(&pi->port, *bp)) { - bp++; - bytes_in--; -#ifdef CONFIG_CONSOLE_POLL - if (unlikely(serial_polled)) { - serial_polled = 0; - return 0; - } -#endif - goto next_frame; - } - - if ((unlikely(cmdstat & (SDMA_DESC_CMDSTAT_BR - | SDMA_DESC_CMDSTAT_FR - | SDMA_DESC_CMDSTAT_OR))) - && !(cmdstat & pi->port.ignore_status_mask)) { - tty_insert_flip_char(tty, *bp, flag); - } else { - for (i=0; i<bytes_in; i++) - tty_insert_flip_char(tty, *bp++, TTY_NORMAL); - - pi->port.icount.rx += bytes_in; - } - -next_frame: - rxre->bytecnt = cpu_to_be16(0); - wmb(); - rxre->cmdstat = cpu_to_be32(SDMA_DESC_CMDSTAT_O - | SDMA_DESC_CMDSTAT_EI | SDMA_DESC_CMDSTAT_F - | SDMA_DESC_CMDSTAT_L); - wmb(); - dma_cache_sync(pi->port.dev, (void *)rxre, MPSC_RXRE_SIZE, - DMA_BIDIRECTIONAL); -#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) - if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ - flush_dcache_range((ulong)rxre, - (ulong)rxre + MPSC_RXRE_SIZE); -#endif - - /* Advance to next descriptor */ - pi->rxr_posn = (pi->rxr_posn + 1) & (MPSC_RXR_ENTRIES - 1); - rxre = (struct mpsc_rx_desc *) - (pi->rxr + (pi->rxr_posn * MPSC_RXRE_SIZE)); - dma_cache_sync(pi->port.dev, (void *)rxre, MPSC_RXRE_SIZE, - DMA_FROM_DEVICE); -#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) - if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ - invalidate_dcache_range((ulong)rxre, - (ulong)rxre + MPSC_RXRE_SIZE); -#endif - rc = 1; - } - - /* Restart rx engine, if its stopped */ - if ((readl(pi->sdma_base + SDMA_SDCM) & SDMA_SDCM_ERD) == 0) - mpsc_start_rx(pi); - - tty_flip_buffer_push(tty); - return rc; -} - -static void mpsc_setup_tx_desc(struct mpsc_port_info *pi, u32 count, u32 intr) -{ - struct mpsc_tx_desc *txre; - - txre = (struct mpsc_tx_desc *)(pi->txr - + (pi->txr_head * MPSC_TXRE_SIZE)); - - txre->bytecnt = cpu_to_be16(count); - txre->shadow = txre->bytecnt; - wmb(); /* ensure cmdstat is last field updated */ - txre->cmdstat = cpu_to_be32(SDMA_DESC_CMDSTAT_O | SDMA_DESC_CMDSTAT_F - | SDMA_DESC_CMDSTAT_L - | ((intr) ? SDMA_DESC_CMDSTAT_EI : 0)); - wmb(); - dma_cache_sync(pi->port.dev, (void *)txre, MPSC_TXRE_SIZE, - DMA_BIDIRECTIONAL); -#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) - if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ - flush_dcache_range((ulong)txre, - (ulong)txre + MPSC_TXRE_SIZE); -#endif -} - -static void mpsc_copy_tx_data(struct mpsc_port_info *pi) -{ - struct circ_buf *xmit = &pi->port.state->xmit; - u8 *bp; - u32 i; - - /* Make sure the desc ring isn't full */ - while (CIRC_CNT(pi->txr_head, pi->txr_tail, MPSC_TXR_ENTRIES) - < (MPSC_TXR_ENTRIES - 1)) { - if (pi->port.x_char) { - /* - * Ideally, we should use the TCS field in - * CHR_1 to put the x_char out immediately but - * errata prevents us from being able to read - * CHR_2 to know that its safe to write to - * CHR_1. Instead, just put it in-band with - * all the other Tx data. - */ - bp = pi->txb + (pi->txr_head * MPSC_TXBE_SIZE); - *bp = pi->port.x_char; - pi->port.x_char = 0; - i = 1; - } else if (!uart_circ_empty(xmit) - && !uart_tx_stopped(&pi->port)) { - i = min((u32)MPSC_TXBE_SIZE, - (u32)uart_circ_chars_pending(xmit)); - i = min(i, (u32)CIRC_CNT_TO_END(xmit->head, xmit->tail, - UART_XMIT_SIZE)); - bp = pi->txb + (pi->txr_head * MPSC_TXBE_SIZE); - memcpy(bp, &xmit->buf[xmit->tail], i); - xmit->tail = (xmit->tail + i) & (UART_XMIT_SIZE - 1); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&pi->port); - } else { /* All tx data copied into ring bufs */ - return; - } - - dma_cache_sync(pi->port.dev, (void *)bp, MPSC_TXBE_SIZE, - DMA_BIDIRECTIONAL); -#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) - if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ - flush_dcache_range((ulong)bp, - (ulong)bp + MPSC_TXBE_SIZE); -#endif - mpsc_setup_tx_desc(pi, i, 1); - - /* Advance to next descriptor */ - pi->txr_head = (pi->txr_head + 1) & (MPSC_TXR_ENTRIES - 1); - } -} - -static int mpsc_tx_intr(struct mpsc_port_info *pi) -{ - struct mpsc_tx_desc *txre; - int rc = 0; - unsigned long iflags; - - spin_lock_irqsave(&pi->tx_lock, iflags); - - if (!mpsc_sdma_tx_active(pi)) { - txre = (struct mpsc_tx_desc *)(pi->txr - + (pi->txr_tail * MPSC_TXRE_SIZE)); - - dma_cache_sync(pi->port.dev, (void *)txre, MPSC_TXRE_SIZE, - DMA_FROM_DEVICE); -#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) - if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ - invalidate_dcache_range((ulong)txre, - (ulong)txre + MPSC_TXRE_SIZE); -#endif - - while (!(be32_to_cpu(txre->cmdstat) & SDMA_DESC_CMDSTAT_O)) { - rc = 1; - pi->port.icount.tx += be16_to_cpu(txre->bytecnt); - pi->txr_tail = (pi->txr_tail+1) & (MPSC_TXR_ENTRIES-1); - - /* If no more data to tx, fall out of loop */ - if (pi->txr_head == pi->txr_tail) - break; - - txre = (struct mpsc_tx_desc *)(pi->txr - + (pi->txr_tail * MPSC_TXRE_SIZE)); - dma_cache_sync(pi->port.dev, (void *)txre, - MPSC_TXRE_SIZE, DMA_FROM_DEVICE); -#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) - if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ - invalidate_dcache_range((ulong)txre, - (ulong)txre + MPSC_TXRE_SIZE); -#endif - } - - mpsc_copy_tx_data(pi); - mpsc_sdma_start_tx(pi); /* start next desc if ready */ - } - - spin_unlock_irqrestore(&pi->tx_lock, iflags); - return rc; -} - -/* - * This is the driver's interrupt handler. To avoid a race, we first clear - * the interrupt, then handle any completed Rx/Tx descriptors. When done - * handling those descriptors, we restart the Rx/Tx engines if they're stopped. - */ -static irqreturn_t mpsc_sdma_intr(int irq, void *dev_id) -{ - struct mpsc_port_info *pi = dev_id; - ulong iflags; - int rc = IRQ_NONE; - - pr_debug("mpsc_sdma_intr[%d]: SDMA Interrupt Received\n",pi->port.line); - - spin_lock_irqsave(&pi->port.lock, iflags); - mpsc_sdma_intr_ack(pi); - if (mpsc_rx_intr(pi)) - rc = IRQ_HANDLED; - if (mpsc_tx_intr(pi)) - rc = IRQ_HANDLED; - spin_unlock_irqrestore(&pi->port.lock, iflags); - - pr_debug("mpsc_sdma_intr[%d]: SDMA Interrupt Handled\n", pi->port.line); - return rc; -} - -/* - ****************************************************************************** - * - * serial_core.c Interface routines - * - ****************************************************************************** - */ -static uint mpsc_tx_empty(struct uart_port *port) -{ - struct mpsc_port_info *pi = (struct mpsc_port_info *)port; - ulong iflags; - uint rc; - - spin_lock_irqsave(&pi->port.lock, iflags); - rc = mpsc_sdma_tx_active(pi) ? 0 : TIOCSER_TEMT; - spin_unlock_irqrestore(&pi->port.lock, iflags); - - return rc; -} - -static void mpsc_set_mctrl(struct uart_port *port, uint mctrl) -{ - /* Have no way to set modem control lines AFAICT */ -} - -static uint mpsc_get_mctrl(struct uart_port *port) -{ - struct mpsc_port_info *pi = (struct mpsc_port_info *)port; - u32 mflags, status; - - status = (pi->mirror_regs) ? pi->MPSC_CHR_10_m - : readl(pi->mpsc_base + MPSC_CHR_10); - - mflags = 0; - if (status & 0x1) - mflags |= TIOCM_CTS; - if (status & 0x2) - mflags |= TIOCM_CAR; - - return mflags | TIOCM_DSR; /* No way to tell if DSR asserted */ -} - -static void mpsc_stop_tx(struct uart_port *port) -{ - struct mpsc_port_info *pi = (struct mpsc_port_info *)port; - - pr_debug("mpsc_stop_tx[%d]\n", port->line); - - mpsc_freeze(pi); -} - -static void mpsc_start_tx(struct uart_port *port) -{ - struct mpsc_port_info *pi = (struct mpsc_port_info *)port; - unsigned long iflags; - - spin_lock_irqsave(&pi->tx_lock, iflags); - - mpsc_unfreeze(pi); - mpsc_copy_tx_data(pi); - mpsc_sdma_start_tx(pi); - - spin_unlock_irqrestore(&pi->tx_lock, iflags); - - pr_debug("mpsc_start_tx[%d]\n", port->line); -} - -static void mpsc_start_rx(struct mpsc_port_info *pi) -{ - pr_debug("mpsc_start_rx[%d]: Starting...\n", pi->port.line); - - if (pi->rcv_data) { - mpsc_enter_hunt(pi); - mpsc_sdma_cmd(pi, SDMA_SDCM_ERD); - } -} - -static void mpsc_stop_rx(struct uart_port *port) -{ - struct mpsc_port_info *pi = (struct mpsc_port_info *)port; - - pr_debug("mpsc_stop_rx[%d]: Stopping...\n", port->line); - - if (pi->mirror_regs) { - writel(pi->MPSC_CHR_2_m | MPSC_CHR_2_RA, - pi->mpsc_base + MPSC_CHR_2); - /* Erratum prevents reading CHR_2 so just delay for a while */ - udelay(100); - } else { - writel(readl(pi->mpsc_base + MPSC_CHR_2) | MPSC_CHR_2_RA, - pi->mpsc_base + MPSC_CHR_2); - - while (readl(pi->mpsc_base + MPSC_CHR_2) & MPSC_CHR_2_RA) - udelay(10); - } - - mpsc_sdma_cmd(pi, SDMA_SDCM_AR); -} - -static void mpsc_enable_ms(struct uart_port *port) -{ -} - -static void mpsc_break_ctl(struct uart_port *port, int ctl) -{ - struct mpsc_port_info *pi = (struct mpsc_port_info *)port; - ulong flags; - u32 v; - - v = ctl ? 0x00ff0000 : 0; - - spin_lock_irqsave(&pi->port.lock, flags); - if (pi->mirror_regs) - pi->MPSC_CHR_1_m = v; - writel(v, pi->mpsc_base + MPSC_CHR_1); - spin_unlock_irqrestore(&pi->port.lock, flags); -} - -static int mpsc_startup(struct uart_port *port) -{ - struct mpsc_port_info *pi = (struct mpsc_port_info *)port; - u32 flag = 0; - int rc; - - pr_debug("mpsc_startup[%d]: Starting up MPSC, irq: %d\n", - port->line, pi->port.irq); - - if ((rc = mpsc_make_ready(pi)) == 0) { - /* Setup IRQ handler */ - mpsc_sdma_intr_ack(pi); - - /* If irq's are shared, need to set flag */ - if (mpsc_ports[0].port.irq == mpsc_ports[1].port.irq) - flag = IRQF_SHARED; - - if (request_irq(pi->port.irq, mpsc_sdma_intr, flag, - "mpsc-sdma", pi)) - printk(KERN_ERR "MPSC: Can't get SDMA IRQ %d\n", - pi->port.irq); - - mpsc_sdma_intr_unmask(pi, 0xf); - mpsc_sdma_set_rx_ring(pi, (struct mpsc_rx_desc *)(pi->rxr_p - + (pi->rxr_posn * MPSC_RXRE_SIZE))); - } - - return rc; -} - -static void mpsc_shutdown(struct uart_port *port) -{ - struct mpsc_port_info *pi = (struct mpsc_port_info *)port; - - pr_debug("mpsc_shutdown[%d]: Shutting down MPSC\n", port->line); - - mpsc_sdma_stop(pi); - free_irq(pi->port.irq, pi); -} - -static void mpsc_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct mpsc_port_info *pi = (struct mpsc_port_info *)port; - u32 baud; - ulong flags; - u32 chr_bits, stop_bits, par; - - pi->c_iflag = termios->c_iflag; - pi->c_cflag = termios->c_cflag; - - switch (termios->c_cflag & CSIZE) { - case CS5: - chr_bits = MPSC_MPCR_CL_5; - break; - case CS6: - chr_bits = MPSC_MPCR_CL_6; - break; - case CS7: - chr_bits = MPSC_MPCR_CL_7; - break; - case CS8: - default: - chr_bits = MPSC_MPCR_CL_8; - break; - } - - if (termios->c_cflag & CSTOPB) - stop_bits = MPSC_MPCR_SBL_2; - else - stop_bits = MPSC_MPCR_SBL_1; - - par = MPSC_CHR_2_PAR_EVEN; - if (termios->c_cflag & PARENB) - if (termios->c_cflag & PARODD) - par = MPSC_CHR_2_PAR_ODD; -#ifdef CMSPAR - if (termios->c_cflag & CMSPAR) { - if (termios->c_cflag & PARODD) - par = MPSC_CHR_2_PAR_MARK; - else - par = MPSC_CHR_2_PAR_SPACE; - } -#endif - - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk); - - spin_lock_irqsave(&pi->port.lock, flags); - - uart_update_timeout(port, termios->c_cflag, baud); - - mpsc_set_char_length(pi, chr_bits); - mpsc_set_stop_bit_length(pi, stop_bits); - mpsc_set_parity(pi, par); - mpsc_set_baudrate(pi, baud); - - /* Characters/events to read */ - pi->port.read_status_mask = SDMA_DESC_CMDSTAT_OR; - - if (termios->c_iflag & INPCK) - pi->port.read_status_mask |= SDMA_DESC_CMDSTAT_PE - | SDMA_DESC_CMDSTAT_FR; - - if (termios->c_iflag & (BRKINT | PARMRK)) - pi->port.read_status_mask |= SDMA_DESC_CMDSTAT_BR; - - /* Characters/events to ignore */ - pi->port.ignore_status_mask = 0; - - if (termios->c_iflag & IGNPAR) - pi->port.ignore_status_mask |= SDMA_DESC_CMDSTAT_PE - | SDMA_DESC_CMDSTAT_FR; - - if (termios->c_iflag & IGNBRK) { - pi->port.ignore_status_mask |= SDMA_DESC_CMDSTAT_BR; - - if (termios->c_iflag & IGNPAR) - pi->port.ignore_status_mask |= SDMA_DESC_CMDSTAT_OR; - } - - if ((termios->c_cflag & CREAD)) { - if (!pi->rcv_data) { - pi->rcv_data = 1; - mpsc_start_rx(pi); - } - } else if (pi->rcv_data) { - mpsc_stop_rx(port); - pi->rcv_data = 0; - } - - spin_unlock_irqrestore(&pi->port.lock, flags); -} - -static const char *mpsc_type(struct uart_port *port) -{ - pr_debug("mpsc_type[%d]: port type: %s\n", port->line,MPSC_DRIVER_NAME); - return MPSC_DRIVER_NAME; -} - -static int mpsc_request_port(struct uart_port *port) -{ - /* Should make chip/platform specific call */ - return 0; -} - -static void mpsc_release_port(struct uart_port *port) -{ - struct mpsc_port_info *pi = (struct mpsc_port_info *)port; - - if (pi->ready) { - mpsc_uninit_rings(pi); - mpsc_free_ring_mem(pi); - pi->ready = 0; - } -} - -static void mpsc_config_port(struct uart_port *port, int flags) -{ -} - -static int mpsc_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - struct mpsc_port_info *pi = (struct mpsc_port_info *)port; - int rc = 0; - - pr_debug("mpsc_verify_port[%d]: Verifying port data\n", pi->port.line); - - if (ser->type != PORT_UNKNOWN && ser->type != PORT_MPSC) - rc = -EINVAL; - else if (pi->port.irq != ser->irq) - rc = -EINVAL; - else if (ser->io_type != SERIAL_IO_MEM) - rc = -EINVAL; - else if (pi->port.uartclk / 16 != ser->baud_base) /* Not sure */ - rc = -EINVAL; - else if ((void *)pi->port.mapbase != ser->iomem_base) - rc = -EINVAL; - else if (pi->port.iobase != ser->port) - rc = -EINVAL; - else if (ser->hub6 != 0) - rc = -EINVAL; - - return rc; -} -#ifdef CONFIG_CONSOLE_POLL -/* Serial polling routines for writing and reading from the uart while - * in an interrupt or debug context. - */ - -static char poll_buf[2048]; -static int poll_ptr; -static int poll_cnt; -static void mpsc_put_poll_char(struct uart_port *port, - unsigned char c); - -static int mpsc_get_poll_char(struct uart_port *port) -{ - struct mpsc_port_info *pi = (struct mpsc_port_info *)port; - struct mpsc_rx_desc *rxre; - u32 cmdstat, bytes_in, i; - u8 *bp; - - if (!serial_polled) - serial_polled = 1; - - pr_debug("mpsc_rx_intr[%d]: Handling Rx intr\n", pi->port.line); - - if (poll_cnt) { - poll_cnt--; - return poll_buf[poll_ptr++]; - } - poll_ptr = 0; - poll_cnt = 0; - - while (poll_cnt == 0) { - rxre = (struct mpsc_rx_desc *)(pi->rxr + - (pi->rxr_posn*MPSC_RXRE_SIZE)); - dma_cache_sync(pi->port.dev, (void *)rxre, - MPSC_RXRE_SIZE, DMA_FROM_DEVICE); -#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) - if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ - invalidate_dcache_range((ulong)rxre, - (ulong)rxre + MPSC_RXRE_SIZE); -#endif - /* - * Loop through Rx descriptors handling ones that have - * been completed. - */ - while (poll_cnt == 0 && - !((cmdstat = be32_to_cpu(rxre->cmdstat)) & - SDMA_DESC_CMDSTAT_O)){ - bytes_in = be16_to_cpu(rxre->bytecnt); - bp = pi->rxb + (pi->rxr_posn * MPSC_RXBE_SIZE); - dma_cache_sync(pi->port.dev, (void *) bp, - MPSC_RXBE_SIZE, DMA_FROM_DEVICE); -#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) - if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ - invalidate_dcache_range((ulong)bp, - (ulong)bp + MPSC_RXBE_SIZE); -#endif - if ((unlikely(cmdstat & (SDMA_DESC_CMDSTAT_BR | - SDMA_DESC_CMDSTAT_FR | SDMA_DESC_CMDSTAT_OR))) && - !(cmdstat & pi->port.ignore_status_mask)) { - poll_buf[poll_cnt] = *bp; - poll_cnt++; - } else { - for (i = 0; i < bytes_in; i++) { - poll_buf[poll_cnt] = *bp++; - poll_cnt++; - } - pi->port.icount.rx += bytes_in; - } - rxre->bytecnt = cpu_to_be16(0); - wmb(); - rxre->cmdstat = cpu_to_be32(SDMA_DESC_CMDSTAT_O | - SDMA_DESC_CMDSTAT_EI | - SDMA_DESC_CMDSTAT_F | - SDMA_DESC_CMDSTAT_L); - wmb(); - dma_cache_sync(pi->port.dev, (void *)rxre, - MPSC_RXRE_SIZE, DMA_BIDIRECTIONAL); -#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) - if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ - flush_dcache_range((ulong)rxre, - (ulong)rxre + MPSC_RXRE_SIZE); -#endif - - /* Advance to next descriptor */ - pi->rxr_posn = (pi->rxr_posn + 1) & - (MPSC_RXR_ENTRIES - 1); - rxre = (struct mpsc_rx_desc *)(pi->rxr + - (pi->rxr_posn * MPSC_RXRE_SIZE)); - dma_cache_sync(pi->port.dev, (void *)rxre, - MPSC_RXRE_SIZE, DMA_FROM_DEVICE); -#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) - if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ - invalidate_dcache_range((ulong)rxre, - (ulong)rxre + MPSC_RXRE_SIZE); -#endif - } - - /* Restart rx engine, if its stopped */ - if ((readl(pi->sdma_base + SDMA_SDCM) & SDMA_SDCM_ERD) == 0) - mpsc_start_rx(pi); - } - if (poll_cnt) { - poll_cnt--; - return poll_buf[poll_ptr++]; - } - - return 0; -} - - -static void mpsc_put_poll_char(struct uart_port *port, - unsigned char c) -{ - struct mpsc_port_info *pi = (struct mpsc_port_info *)port; - u32 data; - - data = readl(pi->mpsc_base + MPSC_MPCR); - writeb(c, pi->mpsc_base + MPSC_CHR_1); - mb(); - data = readl(pi->mpsc_base + MPSC_CHR_2); - data |= MPSC_CHR_2_TTCS; - writel(data, pi->mpsc_base + MPSC_CHR_2); - mb(); - - while (readl(pi->mpsc_base + MPSC_CHR_2) & MPSC_CHR_2_TTCS); -} -#endif - -static struct uart_ops mpsc_pops = { - .tx_empty = mpsc_tx_empty, - .set_mctrl = mpsc_set_mctrl, - .get_mctrl = mpsc_get_mctrl, - .stop_tx = mpsc_stop_tx, - .start_tx = mpsc_start_tx, - .stop_rx = mpsc_stop_rx, - .enable_ms = mpsc_enable_ms, - .break_ctl = mpsc_break_ctl, - .startup = mpsc_startup, - .shutdown = mpsc_shutdown, - .set_termios = mpsc_set_termios, - .type = mpsc_type, - .release_port = mpsc_release_port, - .request_port = mpsc_request_port, - .config_port = mpsc_config_port, - .verify_port = mpsc_verify_port, -#ifdef CONFIG_CONSOLE_POLL - .poll_get_char = mpsc_get_poll_char, - .poll_put_char = mpsc_put_poll_char, -#endif -}; - -/* - ****************************************************************************** - * - * Console Interface Routines - * - ****************************************************************************** - */ - -#ifdef CONFIG_SERIAL_MPSC_CONSOLE -static void mpsc_console_write(struct console *co, const char *s, uint count) -{ - struct mpsc_port_info *pi = &mpsc_ports[co->index]; - u8 *bp, *dp, add_cr = 0; - int i; - unsigned long iflags; - - spin_lock_irqsave(&pi->tx_lock, iflags); - - while (pi->txr_head != pi->txr_tail) { - while (mpsc_sdma_tx_active(pi)) - udelay(100); - mpsc_sdma_intr_ack(pi); - mpsc_tx_intr(pi); - } - - while (mpsc_sdma_tx_active(pi)) - udelay(100); - - while (count > 0) { - bp = dp = pi->txb + (pi->txr_head * MPSC_TXBE_SIZE); - - for (i = 0; i < MPSC_TXBE_SIZE; i++) { - if (count == 0) - break; - - if (add_cr) { - *(dp++) = '\r'; - add_cr = 0; - } else { - *(dp++) = *s; - - if (*(s++) == '\n') { /* add '\r' after '\n' */ - add_cr = 1; - count++; - } - } - - count--; - } - - dma_cache_sync(pi->port.dev, (void *)bp, MPSC_TXBE_SIZE, - DMA_BIDIRECTIONAL); -#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) - if (pi->cache_mgmt) /* GT642[46]0 Res #COMM-2 */ - flush_dcache_range((ulong)bp, - (ulong)bp + MPSC_TXBE_SIZE); -#endif - mpsc_setup_tx_desc(pi, i, 0); - pi->txr_head = (pi->txr_head + 1) & (MPSC_TXR_ENTRIES - 1); - mpsc_sdma_start_tx(pi); - - while (mpsc_sdma_tx_active(pi)) - udelay(100); - - pi->txr_tail = (pi->txr_tail + 1) & (MPSC_TXR_ENTRIES - 1); - } - - spin_unlock_irqrestore(&pi->tx_lock, iflags); -} - -static int __init mpsc_console_setup(struct console *co, char *options) -{ - struct mpsc_port_info *pi; - int baud, bits, parity, flow; - - pr_debug("mpsc_console_setup[%d]: options: %s\n", co->index, options); - - if (co->index >= MPSC_NUM_CTLRS) - co->index = 0; - - pi = &mpsc_ports[co->index]; - - baud = pi->default_baud; - bits = pi->default_bits; - parity = pi->default_parity; - flow = pi->default_flow; - - if (!pi->port.ops) - return -ENODEV; - - spin_lock_init(&pi->port.lock); /* Temporary fix--copied from 8250.c */ - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(&pi->port, co, baud, parity, bits, flow); -} - -static struct console mpsc_console = { - .name = MPSC_DEV_NAME, - .write = mpsc_console_write, - .device = uart_console_device, - .setup = mpsc_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &mpsc_reg, -}; - -static int __init mpsc_late_console_init(void) -{ - pr_debug("mpsc_late_console_init: Enter\n"); - - if (!(mpsc_console.flags & CON_ENABLED)) - register_console(&mpsc_console); - return 0; -} - -late_initcall(mpsc_late_console_init); - -#define MPSC_CONSOLE &mpsc_console -#else -#define MPSC_CONSOLE NULL -#endif -/* - ****************************************************************************** - * - * Dummy Platform Driver to extract & map shared register regions - * - ****************************************************************************** - */ -static void mpsc_resource_err(char *s) -{ - printk(KERN_WARNING "MPSC: Platform device resource error in %s\n", s); -} - -static int mpsc_shared_map_regs(struct platform_device *pd) -{ - struct resource *r; - - if ((r = platform_get_resource(pd, IORESOURCE_MEM, - MPSC_ROUTING_BASE_ORDER)) - && request_mem_region(r->start, - MPSC_ROUTING_REG_BLOCK_SIZE, - "mpsc_routing_regs")) { - mpsc_shared_regs.mpsc_routing_base = ioremap(r->start, - MPSC_ROUTING_REG_BLOCK_SIZE); - mpsc_shared_regs.mpsc_routing_base_p = r->start; - } else { - mpsc_resource_err("MPSC routing base"); - return -ENOMEM; - } - - if ((r = platform_get_resource(pd, IORESOURCE_MEM, - MPSC_SDMA_INTR_BASE_ORDER)) - && request_mem_region(r->start, - MPSC_SDMA_INTR_REG_BLOCK_SIZE, - "sdma_intr_regs")) { - mpsc_shared_regs.sdma_intr_base = ioremap(r->start, - MPSC_SDMA_INTR_REG_BLOCK_SIZE); - mpsc_shared_regs.sdma_intr_base_p = r->start; - } else { - iounmap(mpsc_shared_regs.mpsc_routing_base); - release_mem_region(mpsc_shared_regs.mpsc_routing_base_p, - MPSC_ROUTING_REG_BLOCK_SIZE); - mpsc_resource_err("SDMA intr base"); - return -ENOMEM; - } - - return 0; -} - -static void mpsc_shared_unmap_regs(void) -{ - if (!mpsc_shared_regs.mpsc_routing_base) { - iounmap(mpsc_shared_regs.mpsc_routing_base); - release_mem_region(mpsc_shared_regs.mpsc_routing_base_p, - MPSC_ROUTING_REG_BLOCK_SIZE); - } - if (!mpsc_shared_regs.sdma_intr_base) { - iounmap(mpsc_shared_regs.sdma_intr_base); - release_mem_region(mpsc_shared_regs.sdma_intr_base_p, - MPSC_SDMA_INTR_REG_BLOCK_SIZE); - } - - mpsc_shared_regs.mpsc_routing_base = NULL; - mpsc_shared_regs.sdma_intr_base = NULL; - - mpsc_shared_regs.mpsc_routing_base_p = 0; - mpsc_shared_regs.sdma_intr_base_p = 0; -} - -static int mpsc_shared_drv_probe(struct platform_device *dev) -{ - struct mpsc_shared_pdata *pdata; - int rc = -ENODEV; - - if (dev->id == 0) { - if (!(rc = mpsc_shared_map_regs(dev))) { - pdata = (struct mpsc_shared_pdata *) - dev->dev.platform_data; - - mpsc_shared_regs.MPSC_MRR_m = pdata->mrr_val; - mpsc_shared_regs.MPSC_RCRR_m= pdata->rcrr_val; - mpsc_shared_regs.MPSC_TCRR_m= pdata->tcrr_val; - mpsc_shared_regs.SDMA_INTR_CAUSE_m = - pdata->intr_cause_val; - mpsc_shared_regs.SDMA_INTR_MASK_m = - pdata->intr_mask_val; - - rc = 0; - } - } - - return rc; -} - -static int mpsc_shared_drv_remove(struct platform_device *dev) -{ - int rc = -ENODEV; - - if (dev->id == 0) { - mpsc_shared_unmap_regs(); - mpsc_shared_regs.MPSC_MRR_m = 0; - mpsc_shared_regs.MPSC_RCRR_m = 0; - mpsc_shared_regs.MPSC_TCRR_m = 0; - mpsc_shared_regs.SDMA_INTR_CAUSE_m = 0; - mpsc_shared_regs.SDMA_INTR_MASK_m = 0; - rc = 0; - } - - return rc; -} - -static struct platform_driver mpsc_shared_driver = { - .probe = mpsc_shared_drv_probe, - .remove = mpsc_shared_drv_remove, - .driver = { - .name = MPSC_SHARED_NAME, - }, -}; - -/* - ****************************************************************************** - * - * Driver Interface Routines - * - ****************************************************************************** - */ -static struct uart_driver mpsc_reg = { - .owner = THIS_MODULE, - .driver_name = MPSC_DRIVER_NAME, - .dev_name = MPSC_DEV_NAME, - .major = MPSC_MAJOR, - .minor = MPSC_MINOR_START, - .nr = MPSC_NUM_CTLRS, - .cons = MPSC_CONSOLE, -}; - -static int mpsc_drv_map_regs(struct mpsc_port_info *pi, - struct platform_device *pd) -{ - struct resource *r; - - if ((r = platform_get_resource(pd, IORESOURCE_MEM, MPSC_BASE_ORDER)) - && request_mem_region(r->start, MPSC_REG_BLOCK_SIZE, - "mpsc_regs")) { - pi->mpsc_base = ioremap(r->start, MPSC_REG_BLOCK_SIZE); - pi->mpsc_base_p = r->start; - } else { - mpsc_resource_err("MPSC base"); - goto err; - } - - if ((r = platform_get_resource(pd, IORESOURCE_MEM, - MPSC_SDMA_BASE_ORDER)) - && request_mem_region(r->start, - MPSC_SDMA_REG_BLOCK_SIZE, "sdma_regs")) { - pi->sdma_base = ioremap(r->start,MPSC_SDMA_REG_BLOCK_SIZE); - pi->sdma_base_p = r->start; - } else { - mpsc_resource_err("SDMA base"); - if (pi->mpsc_base) { - iounmap(pi->mpsc_base); - pi->mpsc_base = NULL; - } - goto err; - } - - if ((r = platform_get_resource(pd,IORESOURCE_MEM,MPSC_BRG_BASE_ORDER)) - && request_mem_region(r->start, - MPSC_BRG_REG_BLOCK_SIZE, "brg_regs")) { - pi->brg_base = ioremap(r->start, MPSC_BRG_REG_BLOCK_SIZE); - pi->brg_base_p = r->start; - } else { - mpsc_resource_err("BRG base"); - if (pi->mpsc_base) { - iounmap(pi->mpsc_base); - pi->mpsc_base = NULL; - } - if (pi->sdma_base) { - iounmap(pi->sdma_base); - pi->sdma_base = NULL; - } - goto err; - } - return 0; - -err: - return -ENOMEM; -} - -static void mpsc_drv_unmap_regs(struct mpsc_port_info *pi) -{ - if (!pi->mpsc_base) { - iounmap(pi->mpsc_base); - release_mem_region(pi->mpsc_base_p, MPSC_REG_BLOCK_SIZE); - } - if (!pi->sdma_base) { - iounmap(pi->sdma_base); - release_mem_region(pi->sdma_base_p, MPSC_SDMA_REG_BLOCK_SIZE); - } - if (!pi->brg_base) { - iounmap(pi->brg_base); - release_mem_region(pi->brg_base_p, MPSC_BRG_REG_BLOCK_SIZE); - } - - pi->mpsc_base = NULL; - pi->sdma_base = NULL; - pi->brg_base = NULL; - - pi->mpsc_base_p = 0; - pi->sdma_base_p = 0; - pi->brg_base_p = 0; -} - -static void mpsc_drv_get_platform_data(struct mpsc_port_info *pi, - struct platform_device *pd, int num) -{ - struct mpsc_pdata *pdata; - - pdata = (struct mpsc_pdata *)pd->dev.platform_data; - - pi->port.uartclk = pdata->brg_clk_freq; - pi->port.iotype = UPIO_MEM; - pi->port.line = num; - pi->port.type = PORT_MPSC; - pi->port.fifosize = MPSC_TXBE_SIZE; - pi->port.membase = pi->mpsc_base; - pi->port.mapbase = (ulong)pi->mpsc_base; - pi->port.ops = &mpsc_pops; - - pi->mirror_regs = pdata->mirror_regs; - pi->cache_mgmt = pdata->cache_mgmt; - pi->brg_can_tune = pdata->brg_can_tune; - pi->brg_clk_src = pdata->brg_clk_src; - pi->mpsc_max_idle = pdata->max_idle; - pi->default_baud = pdata->default_baud; - pi->default_bits = pdata->default_bits; - pi->default_parity = pdata->default_parity; - pi->default_flow = pdata->default_flow; - - /* Initial values of mirrored regs */ - pi->MPSC_CHR_1_m = pdata->chr_1_val; - pi->MPSC_CHR_2_m = pdata->chr_2_val; - pi->MPSC_CHR_10_m = pdata->chr_10_val; - pi->MPSC_MPCR_m = pdata->mpcr_val; - pi->BRG_BCR_m = pdata->bcr_val; - - pi->shared_regs = &mpsc_shared_regs; - - pi->port.irq = platform_get_irq(pd, 0); -} - -static int mpsc_drv_probe(struct platform_device *dev) -{ - struct mpsc_port_info *pi; - int rc = -ENODEV; - - pr_debug("mpsc_drv_probe: Adding MPSC %d\n", dev->id); - - if (dev->id < MPSC_NUM_CTLRS) { - pi = &mpsc_ports[dev->id]; - - if (!(rc = mpsc_drv_map_regs(pi, dev))) { - mpsc_drv_get_platform_data(pi, dev, dev->id); - pi->port.dev = &dev->dev; - - if (!(rc = mpsc_make_ready(pi))) { - spin_lock_init(&pi->tx_lock); - if (!(rc = uart_add_one_port(&mpsc_reg, - &pi->port))) { - rc = 0; - } else { - mpsc_release_port((struct uart_port *) - pi); - mpsc_drv_unmap_regs(pi); - } - } else { - mpsc_drv_unmap_regs(pi); - } - } - } - - return rc; -} - -static int mpsc_drv_remove(struct platform_device *dev) -{ - pr_debug("mpsc_drv_exit: Removing MPSC %d\n", dev->id); - - if (dev->id < MPSC_NUM_CTLRS) { - uart_remove_one_port(&mpsc_reg, &mpsc_ports[dev->id].port); - mpsc_release_port((struct uart_port *) - &mpsc_ports[dev->id].port); - mpsc_drv_unmap_regs(&mpsc_ports[dev->id]); - return 0; - } else { - return -ENODEV; - } -} - -static struct platform_driver mpsc_driver = { - .probe = mpsc_drv_probe, - .remove = mpsc_drv_remove, - .driver = { - .name = MPSC_CTLR_NAME, - .owner = THIS_MODULE, - }, -}; - -static int __init mpsc_drv_init(void) -{ - int rc; - - printk(KERN_INFO "Serial: MPSC driver\n"); - - memset(mpsc_ports, 0, sizeof(mpsc_ports)); - memset(&mpsc_shared_regs, 0, sizeof(mpsc_shared_regs)); - - if (!(rc = uart_register_driver(&mpsc_reg))) { - if (!(rc = platform_driver_register(&mpsc_shared_driver))) { - if ((rc = platform_driver_register(&mpsc_driver))) { - platform_driver_unregister(&mpsc_shared_driver); - uart_unregister_driver(&mpsc_reg); - } - } else { - uart_unregister_driver(&mpsc_reg); - } - } - - return rc; -} - -static void __exit mpsc_drv_exit(void) -{ - platform_driver_unregister(&mpsc_driver); - platform_driver_unregister(&mpsc_shared_driver); - uart_unregister_driver(&mpsc_reg); - memset(mpsc_ports, 0, sizeof(mpsc_ports)); - memset(&mpsc_shared_regs, 0, sizeof(mpsc_shared_regs)); -} - -module_init(mpsc_drv_init); -module_exit(mpsc_drv_exit); - -MODULE_AUTHOR("Mark A. Greer <mgreer@mvista.com>"); -MODULE_DESCRIPTION("Generic Marvell MPSC serial/UART driver"); -MODULE_VERSION(MPSC_VERSION); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_CHARDEV_MAJOR(MPSC_MAJOR); -MODULE_ALIAS("platform:" MPSC_CTLR_NAME); diff --git a/drivers/serial/mrst_max3110.c b/drivers/serial/mrst_max3110.c deleted file mode 100644 index b62857bf2fdb..000000000000 --- a/drivers/serial/mrst_max3110.c +++ /dev/null @@ -1,919 +0,0 @@ -/* - * mrst_max3110.c - spi uart protocol driver for Maxim 3110 - * - * Copyright (c) 2008-2010, Intel Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. - */ - -/* - * Note: - * 1. From Max3110 spec, the Rx FIFO has 8 words, while the Tx FIFO only has - * 1 word. If SPI master controller doesn't support sclk frequency change, - * then the char need be sent out one by one with some delay - * - * 2. Currently only RX availabe interrrupt is used, no need for waiting TXE - * interrupt for a low speed UART device - */ - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/irq.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/serial_reg.h> - -#include <linux/kthread.h> -#include <linux/spi/spi.h> - -#include "mrst_max3110.h" - -#define PR_FMT "mrst_max3110: " - -#define UART_TX_NEEDED 1 -#define CON_TX_NEEDED 2 -#define BIT_IRQ_PENDING 3 - -struct uart_max3110 { - struct uart_port port; - struct spi_device *spi; - char name[24]; - - wait_queue_head_t wq; - struct task_struct *main_thread; - struct task_struct *read_thread; - struct mutex thread_mutex;; - - u32 baud; - u16 cur_conf; - u8 clock; - u8 parity, word_7bits; - u16 irq; - - unsigned long uart_flags; - - /* console related */ - struct circ_buf con_xmit; -}; - -/* global data structure, may need be removed */ -static struct uart_max3110 *pmax; - -static void receive_chars(struct uart_max3110 *max, - unsigned char *str, int len); -static int max3110_read_multi(struct uart_max3110 *max, u8 *buf); -static void max3110_con_receive(struct uart_max3110 *max); - -static int max3110_write_then_read(struct uart_max3110 *max, - const void *txbuf, void *rxbuf, unsigned len, int always_fast) -{ - struct spi_device *spi = max->spi; - struct spi_message message; - struct spi_transfer x; - int ret; - - spi_message_init(&message); - memset(&x, 0, sizeof x); - x.len = len; - x.tx_buf = txbuf; - x.rx_buf = rxbuf; - spi_message_add_tail(&x, &message); - - if (always_fast) - x.speed_hz = spi->max_speed_hz; - else if (max->baud) - x.speed_hz = max->baud; - - /* Do the i/o */ - ret = spi_sync(spi, &message); - return ret; -} - -/* Write a 16b word to the device */ -static int max3110_out(struct uart_max3110 *max, const u16 out) -{ - void *buf; - u16 *obuf, *ibuf; - u8 ch; - int ret; - - buf = kzalloc(8, GFP_KERNEL | GFP_DMA); - if (!buf) - return -ENOMEM; - - obuf = buf; - ibuf = buf + 4; - *obuf = out; - ret = max3110_write_then_read(max, obuf, ibuf, 2, 1); - if (ret) { - pr_warning(PR_FMT "%s(): get err msg %d when sending 0x%x\n", - __func__, ret, out); - goto exit; - } - - /* If some valid data is read back */ - if (*ibuf & MAX3110_READ_DATA_AVAILABLE) { - ch = *ibuf & 0xff; - receive_chars(max, &ch, 1); - } - -exit: - kfree(buf); - return ret; -} - -/* - * This is usually used to read data from SPIC RX FIFO, which doesn't - * need any delay like flushing character out. - * - * Return how many valide bytes are read back - */ -static int max3110_read_multi(struct uart_max3110 *max, u8 *rxbuf) -{ - void *buf; - u16 *obuf, *ibuf; - u8 *pbuf, valid_str[M3110_RX_FIFO_DEPTH]; - int i, j, blen; - - blen = M3110_RX_FIFO_DEPTH * sizeof(u16); - buf = kzalloc(blen * 2, GFP_KERNEL | GFP_DMA); - if (!buf) { - pr_warning(PR_FMT "%s(): fail to alloc dma buffer\n", __func__); - return 0; - } - - /* tx/rx always have the same length */ - obuf = buf; - ibuf = buf + blen; - - if (max3110_write_then_read(max, obuf, ibuf, blen, 1)) { - kfree(buf); - return 0; - } - - /* If caller doesn't provide a buffer, then handle received char */ - pbuf = rxbuf ? rxbuf : valid_str; - - for (i = 0, j = 0; i < M3110_RX_FIFO_DEPTH; i++) { - if (ibuf[i] & MAX3110_READ_DATA_AVAILABLE) - pbuf[j++] = ibuf[i] & 0xff; - } - - if (j && (pbuf == valid_str)) - receive_chars(max, valid_str, j); - - kfree(buf); - return j; -} - -static void serial_m3110_con_putchar(struct uart_port *port, int ch) -{ - struct uart_max3110 *max = - container_of(port, struct uart_max3110, port); - struct circ_buf *xmit = &max->con_xmit; - - if (uart_circ_chars_free(xmit)) { - xmit->buf[xmit->head] = (char)ch; - xmit->head = (xmit->head + 1) & (PAGE_SIZE - 1); - } -} - -/* - * Print a string to the serial port trying not to disturb - * any possible real use of the port... - * - * The console_lock must be held when we get here. - */ -static void serial_m3110_con_write(struct console *co, - const char *s, unsigned int count) -{ - if (!pmax) - return; - - uart_console_write(&pmax->port, s, count, serial_m3110_con_putchar); - - if (!test_and_set_bit(CON_TX_NEEDED, &pmax->uart_flags)) - wake_up_process(pmax->main_thread); -} - -static int __init -serial_m3110_con_setup(struct console *co, char *options) -{ - struct uart_max3110 *max = pmax; - int baud = 115200; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - pr_info(PR_FMT "setting up console\n"); - - if (co->index == -1) - co->index = 0; - - if (!max) { - pr_err(PR_FMT "pmax is NULL, return"); - return -ENODEV; - } - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(&max->port, co, baud, parity, bits, flow); -} - -static struct tty_driver *serial_m3110_con_device(struct console *co, - int *index) -{ - struct uart_driver *p = co->data; - *index = co->index; - return p->tty_driver; -} - -static struct uart_driver serial_m3110_reg; -static struct console serial_m3110_console = { - .name = "ttyS", - .write = serial_m3110_con_write, - .device = serial_m3110_con_device, - .setup = serial_m3110_con_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &serial_m3110_reg, -}; - -static unsigned int serial_m3110_tx_empty(struct uart_port *port) -{ - return 1; -} - -static void serial_m3110_stop_tx(struct uart_port *port) -{ - return; -} - -/* stop_rx will be called in spin_lock env */ -static void serial_m3110_stop_rx(struct uart_port *port) -{ - return; -} - -#define WORDS_PER_XFER 128 -static void send_circ_buf(struct uart_max3110 *max, - struct circ_buf *xmit) -{ - void *buf; - u16 *obuf, *ibuf; - u8 valid_str[WORDS_PER_XFER]; - int i, j, len, blen, dma_size, left, ret = 0; - - - dma_size = WORDS_PER_XFER * sizeof(u16) * 2; - buf = kzalloc(dma_size, GFP_KERNEL | GFP_DMA); - if (!buf) - return; - obuf = buf; - ibuf = buf + dma_size/2; - - while (!uart_circ_empty(xmit)) { - left = uart_circ_chars_pending(xmit); - while (left) { - len = min(left, WORDS_PER_XFER); - blen = len * sizeof(u16); - memset(ibuf, 0, blen); - - for (i = 0; i < len; i++) { - obuf[i] = (u8)xmit->buf[xmit->tail] | WD_TAG; - xmit->tail = (xmit->tail + 1) & - (UART_XMIT_SIZE - 1); - } - - /* Fail to send msg to console is not very critical */ - ret = max3110_write_then_read(max, obuf, ibuf, blen, 0); - if (ret) - pr_warning(PR_FMT "%s(): get err msg %d\n", - __func__, ret); - - for (i = 0, j = 0; i < len; i++) { - if (ibuf[i] & MAX3110_READ_DATA_AVAILABLE) - valid_str[j++] = ibuf[i] & 0xff; - } - - if (j) - receive_chars(max, valid_str, j); - - max->port.icount.tx += len; - left -= len; - } - } - - kfree(buf); -} - -static void transmit_char(struct uart_max3110 *max) -{ - struct uart_port *port = &max->port; - struct circ_buf *xmit = &port->state->xmit; - - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) - return; - - send_circ_buf(max, xmit); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (uart_circ_empty(xmit)) - serial_m3110_stop_tx(port); -} - -/* - * This will be called by uart_write() and tty_write, can't - * go to sleep - */ -static void serial_m3110_start_tx(struct uart_port *port) -{ - struct uart_max3110 *max = - container_of(port, struct uart_max3110, port); - - if (!test_and_set_bit(UART_TX_NEEDED, &max->uart_flags)) - wake_up_process(max->main_thread); -} - -static void receive_chars(struct uart_max3110 *max, unsigned char *str, int len) -{ - struct uart_port *port = &max->port; - struct tty_struct *tty; - int usable; - - /* If uart is not opened, just return */ - if (!port->state) - return; - - tty = port->state->port.tty; - if (!tty) - return; - - while (len) { - usable = tty_buffer_request_room(tty, len); - if (usable) { - tty_insert_flip_string(tty, str, usable); - str += usable; - port->icount.rx += usable; - } - len -= usable; - } - tty_flip_buffer_push(tty); -} - -/* - * This routine will be used in read_thread or RX IRQ handling, - * it will first do one round buffer read(8 words), if there is some - * valid RX data, will try to read 5 more rounds till all data - * is read out. - * - * Use stack space as data buffer to save some system load, and chose - * 504 Btyes as a threadhold to do a bulk push to upper tty layer when - * receiving bulk data, a much bigger buffer may cause stack overflow - */ -static void max3110_con_receive(struct uart_max3110 *max) -{ - int loop = 1, num, total = 0; - u8 recv_buf[512], *pbuf; - - pbuf = recv_buf; - do { - num = max3110_read_multi(max, pbuf); - - if (num) { - loop = 5; - pbuf += num; - total += num; - - if (total >= 504) { - receive_chars(max, recv_buf, total); - pbuf = recv_buf; - total = 0; - } - } - } while (--loop); - - if (total) - receive_chars(max, recv_buf, total); -} - -static int max3110_main_thread(void *_max) -{ - struct uart_max3110 *max = _max; - wait_queue_head_t *wq = &max->wq; - int ret = 0; - struct circ_buf *xmit = &max->con_xmit; - - init_waitqueue_head(wq); - pr_info(PR_FMT "start main thread\n"); - - do { - wait_event_interruptible(*wq, max->uart_flags || kthread_should_stop()); - - mutex_lock(&max->thread_mutex); - - if (test_and_clear_bit(BIT_IRQ_PENDING, &max->uart_flags)) - max3110_con_receive(max); - - /* first handle console output */ - if (test_and_clear_bit(CON_TX_NEEDED, &max->uart_flags)) - send_circ_buf(max, xmit); - - /* handle uart output */ - if (test_and_clear_bit(UART_TX_NEEDED, &max->uart_flags)) - transmit_char(max); - - mutex_unlock(&max->thread_mutex); - - } while (!kthread_should_stop()); - - return ret; -} - -static irqreturn_t serial_m3110_irq(int irq, void *dev_id) -{ - struct uart_max3110 *max = dev_id; - - /* max3110's irq is a falling edge, not level triggered, - * so no need to disable the irq */ - if (!test_and_set_bit(BIT_IRQ_PENDING, &max->uart_flags)) - wake_up_process(max->main_thread); - - return IRQ_HANDLED; -} - -/* if don't use RX IRQ, then need a thread to polling read */ -static int max3110_read_thread(void *_max) -{ - struct uart_max3110 *max = _max; - - pr_info(PR_FMT "start read thread\n"); - do { - /* - * If can't acquire the mutex, it means the main thread - * is running which will also perform the rx job - */ - if (mutex_trylock(&max->thread_mutex)) { - max3110_con_receive(max); - mutex_unlock(&max->thread_mutex); - } - - set_current_state(TASK_INTERRUPTIBLE); - schedule_timeout(HZ / 20); - } while (!kthread_should_stop()); - - return 0; -} - -static int serial_m3110_startup(struct uart_port *port) -{ - struct uart_max3110 *max = - container_of(port, struct uart_max3110, port); - u16 config = 0; - int ret = 0; - - if (port->line != 0) { - pr_err(PR_FMT "uart port startup failed\n"); - return -1; - } - - /* Disable all IRQ and config it to 115200, 8n1 */ - config = WC_TAG | WC_FIFO_ENABLE - | WC_1_STOPBITS - | WC_8BIT_WORD - | WC_BAUD_DR2; - - /* as we use thread to handle tx/rx, need set low latency */ - port->state->port.tty->low_latency = 1; - - if (max->irq) { - max->read_thread = NULL; - ret = request_irq(max->irq, serial_m3110_irq, - IRQ_TYPE_EDGE_FALLING, "max3110", max); - if (ret) { - max->irq = 0; - pr_err(PR_FMT "unable to allocate IRQ, polling\n"); - } else { - /* Enable RX IRQ only */ - config |= WC_RXA_IRQ_ENABLE; - } - } - - if (max->irq == 0) { - /* If IRQ is disabled, start a read thread for input data */ - max->read_thread = - kthread_run(max3110_read_thread, max, "max3110_read"); - if (IS_ERR(max->read_thread)) { - ret = PTR_ERR(max->read_thread); - max->read_thread = NULL; - pr_err(PR_FMT "Can't create read thread!\n"); - return ret; - } - } - - ret = max3110_out(max, config); - if (ret) { - if (max->irq) - free_irq(max->irq, max); - if (max->read_thread) - kthread_stop(max->read_thread); - max->read_thread = NULL; - return ret; - } - - max->cur_conf = config; - return 0; -} - -static void serial_m3110_shutdown(struct uart_port *port) -{ - struct uart_max3110 *max = - container_of(port, struct uart_max3110, port); - u16 config; - - if (max->read_thread) { - kthread_stop(max->read_thread); - max->read_thread = NULL; - } - - if (max->irq) - free_irq(max->irq, max); - - /* Disable interrupts from this port */ - config = WC_TAG | WC_SW_SHDI; - max3110_out(max, config); -} - -static void serial_m3110_release_port(struct uart_port *port) -{ -} - -static int serial_m3110_request_port(struct uart_port *port) -{ - return 0; -} - -static void serial_m3110_config_port(struct uart_port *port, int flags) -{ - port->type = PORT_MAX3100; -} - -static int -serial_m3110_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - /* we don't want the core code to modify any port params */ - return -EINVAL; -} - - -static const char *serial_m3110_type(struct uart_port *port) -{ - struct uart_max3110 *max = - container_of(port, struct uart_max3110, port); - return max->name; -} - -static void -serial_m3110_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct uart_max3110 *max = - container_of(port, struct uart_max3110, port); - unsigned char cval; - unsigned int baud, parity = 0; - int clk_div = -1; - u16 new_conf = max->cur_conf; - - switch (termios->c_cflag & CSIZE) { - case CS7: - cval = UART_LCR_WLEN7; - new_conf |= WC_7BIT_WORD; - break; - default: - /* We only support CS7 & CS8 */ - termios->c_cflag &= ~CSIZE; - termios->c_cflag |= CS8; - case CS8: - cval = UART_LCR_WLEN8; - new_conf |= WC_8BIT_WORD; - break; - } - - baud = uart_get_baud_rate(port, termios, old, 0, 230400); - - /* First calc the div for 1.8MHZ clock case */ - switch (baud) { - case 300: - clk_div = WC_BAUD_DR384; - break; - case 600: - clk_div = WC_BAUD_DR192; - break; - case 1200: - clk_div = WC_BAUD_DR96; - break; - case 2400: - clk_div = WC_BAUD_DR48; - break; - case 4800: - clk_div = WC_BAUD_DR24; - break; - case 9600: - clk_div = WC_BAUD_DR12; - break; - case 19200: - clk_div = WC_BAUD_DR6; - break; - case 38400: - clk_div = WC_BAUD_DR3; - break; - case 57600: - clk_div = WC_BAUD_DR2; - break; - case 115200: - clk_div = WC_BAUD_DR1; - break; - case 230400: - if (max->clock & MAX3110_HIGH_CLK) - break; - default: - /* Pick the previous baud rate */ - baud = max->baud; - clk_div = max->cur_conf & WC_BAUD_DIV_MASK; - tty_termios_encode_baud_rate(termios, baud, baud); - } - - if (max->clock & MAX3110_HIGH_CLK) { - clk_div += 1; - /* High clk version max3110 doesn't support B300 */ - if (baud == 300) { - baud = 600; - clk_div = WC_BAUD_DR384; - } - if (baud == 230400) - clk_div = WC_BAUD_DR1; - tty_termios_encode_baud_rate(termios, baud, baud); - } - - new_conf = (new_conf & ~WC_BAUD_DIV_MASK) | clk_div; - - if (unlikely(termios->c_cflag & CMSPAR)) - termios->c_cflag &= ~CMSPAR; - - if (termios->c_cflag & CSTOPB) - new_conf |= WC_2_STOPBITS; - else - new_conf &= ~WC_2_STOPBITS; - - if (termios->c_cflag & PARENB) { - new_conf |= WC_PARITY_ENABLE; - parity |= UART_LCR_PARITY; - } else - new_conf &= ~WC_PARITY_ENABLE; - - if (!(termios->c_cflag & PARODD)) - parity |= UART_LCR_EPAR; - max->parity = parity; - - uart_update_timeout(port, termios->c_cflag, baud); - - new_conf |= WC_TAG; - if (new_conf != max->cur_conf) { - if (!max3110_out(max, new_conf)) { - max->cur_conf = new_conf; - max->baud = baud; - } - } -} - -/* Don't handle hw handshaking */ -static unsigned int serial_m3110_get_mctrl(struct uart_port *port) -{ - return TIOCM_DSR | TIOCM_CAR | TIOCM_DSR; -} - -static void serial_m3110_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ -} - -static void serial_m3110_break_ctl(struct uart_port *port, int break_state) -{ -} - -static void serial_m3110_pm(struct uart_port *port, unsigned int state, - unsigned int oldstate) -{ -} - -static void serial_m3110_enable_ms(struct uart_port *port) -{ -} - -struct uart_ops serial_m3110_ops = { - .tx_empty = serial_m3110_tx_empty, - .set_mctrl = serial_m3110_set_mctrl, - .get_mctrl = serial_m3110_get_mctrl, - .stop_tx = serial_m3110_stop_tx, - .start_tx = serial_m3110_start_tx, - .stop_rx = serial_m3110_stop_rx, - .enable_ms = serial_m3110_enable_ms, - .break_ctl = serial_m3110_break_ctl, - .startup = serial_m3110_startup, - .shutdown = serial_m3110_shutdown, - .set_termios = serial_m3110_set_termios, - .pm = serial_m3110_pm, - .type = serial_m3110_type, - .release_port = serial_m3110_release_port, - .request_port = serial_m3110_request_port, - .config_port = serial_m3110_config_port, - .verify_port = serial_m3110_verify_port, -}; - -static struct uart_driver serial_m3110_reg = { - .owner = THIS_MODULE, - .driver_name = "MRST serial", - .dev_name = "ttyS", - .major = TTY_MAJOR, - .minor = 64, - .nr = 1, - .cons = &serial_m3110_console, -}; - -#ifdef CONFIG_PM -static int serial_m3110_suspend(struct spi_device *spi, pm_message_t state) -{ - struct uart_max3110 *max = spi_get_drvdata(spi); - - disable_irq(max->irq); - uart_suspend_port(&serial_m3110_reg, &max->port); - max3110_out(max, max->cur_conf | WC_SW_SHDI); - return 0; -} - -static int serial_m3110_resume(struct spi_device *spi) -{ - struct uart_max3110 *max = spi_get_drvdata(spi); - - max3110_out(max, max->cur_conf); - uart_resume_port(&serial_m3110_reg, &max->port); - enable_irq(max->irq); - return 0; -} -#else -#define serial_m3110_suspend NULL -#define serial_m3110_resume NULL -#endif - -static int __devinit serial_m3110_probe(struct spi_device *spi) -{ - struct uart_max3110 *max; - void *buffer; - u16 res; - int ret = 0; - - max = kzalloc(sizeof(*max), GFP_KERNEL); - if (!max) - return -ENOMEM; - - /* Set spi info */ - spi->bits_per_word = 16; - max->clock = MAX3110_HIGH_CLK; - - spi_setup(spi); - - max->port.type = PORT_MAX3100; - max->port.fifosize = 2; /* Only have 16b buffer */ - max->port.ops = &serial_m3110_ops; - max->port.line = 0; - max->port.dev = &spi->dev; - max->port.uartclk = 115200; - - max->spi = spi; - strcpy(max->name, spi->modalias); - max->irq = (u16)spi->irq; - - mutex_init(&max->thread_mutex); - - max->word_7bits = 0; - max->parity = 0; - max->baud = 0; - - max->cur_conf = 0; - max->uart_flags = 0; - - /* Check if reading configuration register returns something sane */ - - res = RC_TAG; - ret = max3110_write_then_read(max, (u8 *)&res, (u8 *)&res, 2, 0); - if (ret < 0 || res == 0 || res == 0xffff) { - printk(KERN_ERR "MAX3111 deemed not present (conf reg %04x)", - res); - ret = -ENODEV; - goto err_get_page; - } - - buffer = (void *)__get_free_page(GFP_KERNEL); - if (!buffer) { - ret = -ENOMEM; - goto err_get_page; - } - max->con_xmit.buf = buffer; - max->con_xmit.head = 0; - max->con_xmit.tail = 0; - - max->main_thread = kthread_run(max3110_main_thread, - max, "max3110_main"); - if (IS_ERR(max->main_thread)) { - ret = PTR_ERR(max->main_thread); - goto err_kthread; - } - - spi_set_drvdata(spi, max); - pmax = max; - - /* Give membase a psudo value to pass serial_core's check */ - max->port.membase = (void *)0xff110000; - uart_add_one_port(&serial_m3110_reg, &max->port); - - return 0; - -err_kthread: - free_page((unsigned long)buffer); -err_get_page: - kfree(max); - return ret; -} - -static int __devexit serial_m3110_remove(struct spi_device *dev) -{ - struct uart_max3110 *max = spi_get_drvdata(dev); - - if (!max) - return 0; - - uart_remove_one_port(&serial_m3110_reg, &max->port); - - free_page((unsigned long)max->con_xmit.buf); - - if (max->main_thread) - kthread_stop(max->main_thread); - - kfree(max); - return 0; -} - -static struct spi_driver uart_max3110_driver = { - .driver = { - .name = "spi_max3111", - .bus = &spi_bus_type, - .owner = THIS_MODULE, - }, - .probe = serial_m3110_probe, - .remove = __devexit_p(serial_m3110_remove), - .suspend = serial_m3110_suspend, - .resume = serial_m3110_resume, -}; - -static int __init serial_m3110_init(void) -{ - int ret = 0; - - ret = uart_register_driver(&serial_m3110_reg); - if (ret) - return ret; - - ret = spi_register_driver(&uart_max3110_driver); - if (ret) - uart_unregister_driver(&serial_m3110_reg); - - return ret; -} - -static void __exit serial_m3110_exit(void) -{ - spi_unregister_driver(&uart_max3110_driver); - uart_unregister_driver(&serial_m3110_reg); -} - -module_init(serial_m3110_init); -module_exit(serial_m3110_exit); - -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("max3110-uart"); diff --git a/drivers/serial/mrst_max3110.h b/drivers/serial/mrst_max3110.h deleted file mode 100644 index d1ef43af397c..000000000000 --- a/drivers/serial/mrst_max3110.h +++ /dev/null @@ -1,60 +0,0 @@ -#ifndef _MRST_MAX3110_H -#define _MRST_MAX3110_H - -#define MAX3110_HIGH_CLK 0x1 /* 3.6864 MHZ */ -#define MAX3110_LOW_CLK 0x0 /* 1.8432 MHZ */ - -/* status bits for all 4 MAX3110 operate modes */ -#define MAX3110_READ_DATA_AVAILABLE (1 << 15) -#define MAX3110_WRITE_BUF_EMPTY (1 << 14) - -#define WC_TAG (3 << 14) -#define RC_TAG (1 << 14) -#define WD_TAG (2 << 14) -#define RD_TAG (0 << 14) - -/* bits def for write configuration */ -#define WC_FIFO_ENABLE_MASK (1 << 13) -#define WC_FIFO_ENABLE (0 << 13) - -#define WC_SW_SHDI (1 << 12) - -#define WC_IRQ_MASK (0xF << 8) -#define WC_TXE_IRQ_ENABLE (1 << 11) /* TX empty irq */ -#define WC_RXA_IRQ_ENABLE (1 << 10) /* RX availabe irq */ -#define WC_PAR_HIGH_IRQ_ENABLE (1 << 9) -#define WC_REC_ACT_IRQ_ENABLE (1 << 8) - -#define WC_IRDA_ENABLE (1 << 7) - -#define WC_STOPBITS_MASK (1 << 6) -#define WC_2_STOPBITS (1 << 6) -#define WC_1_STOPBITS (0 << 6) - -#define WC_PARITY_ENABLE_MASK (1 << 5) -#define WC_PARITY_ENABLE (1 << 5) - -#define WC_WORDLEN_MASK (1 << 4) -#define WC_7BIT_WORD (1 << 4) -#define WC_8BIT_WORD (0 << 4) - -#define WC_BAUD_DIV_MASK (0xF) -#define WC_BAUD_DR1 (0x0) -#define WC_BAUD_DR2 (0x1) -#define WC_BAUD_DR4 (0x2) -#define WC_BAUD_DR8 (0x3) -#define WC_BAUD_DR16 (0x4) -#define WC_BAUD_DR32 (0x5) -#define WC_BAUD_DR64 (0x6) -#define WC_BAUD_DR128 (0x7) -#define WC_BAUD_DR3 (0x8) -#define WC_BAUD_DR6 (0x9) -#define WC_BAUD_DR12 (0xA) -#define WC_BAUD_DR24 (0xB) -#define WC_BAUD_DR48 (0xC) -#define WC_BAUD_DR96 (0xD) -#define WC_BAUD_DR192 (0xE) -#define WC_BAUD_DR384 (0xF) - -#define M3110_RX_FIFO_DEPTH 8 -#endif diff --git a/drivers/serial/msm_serial.c b/drivers/serial/msm_serial.c deleted file mode 100644 index 8e43a7b69e64..000000000000 --- a/drivers/serial/msm_serial.c +++ /dev/null @@ -1,758 +0,0 @@ -/* - * drivers/serial/msm_serial.c - driver for msm7k serial device and console - * - * Copyright (C) 2007 Google, Inc. - * Author: Robert Love <rlove@google.com> - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#if defined(CONFIG_SERIAL_MSM_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -# define SUPPORT_SYSRQ -#endif - -#include <linux/hrtimer.h> -#include <linux/module.h> -#include <linux/io.h> -#include <linux/ioport.h> -#include <linux/irq.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/serial.h> -#include <linux/clk.h> -#include <linux/platform_device.h> - -#include "msm_serial.h" - -struct msm_port { - struct uart_port uart; - char name[16]; - struct clk *clk; - unsigned int imr; -}; - -static void msm_stop_tx(struct uart_port *port) -{ - struct msm_port *msm_port = UART_TO_MSM(port); - - msm_port->imr &= ~UART_IMR_TXLEV; - msm_write(port, msm_port->imr, UART_IMR); -} - -static void msm_start_tx(struct uart_port *port) -{ - struct msm_port *msm_port = UART_TO_MSM(port); - - msm_port->imr |= UART_IMR_TXLEV; - msm_write(port, msm_port->imr, UART_IMR); -} - -static void msm_stop_rx(struct uart_port *port) -{ - struct msm_port *msm_port = UART_TO_MSM(port); - - msm_port->imr &= ~(UART_IMR_RXLEV | UART_IMR_RXSTALE); - msm_write(port, msm_port->imr, UART_IMR); -} - -static void msm_enable_ms(struct uart_port *port) -{ - struct msm_port *msm_port = UART_TO_MSM(port); - - msm_port->imr |= UART_IMR_DELTA_CTS; - msm_write(port, msm_port->imr, UART_IMR); -} - -static void handle_rx(struct uart_port *port) -{ - struct tty_struct *tty = port->state->port.tty; - unsigned int sr; - - /* - * Handle overrun. My understanding of the hardware is that overrun - * is not tied to the RX buffer, so we handle the case out of band. - */ - if ((msm_read(port, UART_SR) & UART_SR_OVERRUN)) { - port->icount.overrun++; - tty_insert_flip_char(tty, 0, TTY_OVERRUN); - msm_write(port, UART_CR_CMD_RESET_ERR, UART_CR); - } - - /* and now the main RX loop */ - while ((sr = msm_read(port, UART_SR)) & UART_SR_RX_READY) { - unsigned int c; - char flag = TTY_NORMAL; - - c = msm_read(port, UART_RF); - - if (sr & UART_SR_RX_BREAK) { - port->icount.brk++; - if (uart_handle_break(port)) - continue; - } else if (sr & UART_SR_PAR_FRAME_ERR) { - port->icount.frame++; - } else { - port->icount.rx++; - } - - /* Mask conditions we're ignorning. */ - sr &= port->read_status_mask; - - if (sr & UART_SR_RX_BREAK) { - flag = TTY_BREAK; - } else if (sr & UART_SR_PAR_FRAME_ERR) { - flag = TTY_FRAME; - } - - if (!uart_handle_sysrq_char(port, c)) - tty_insert_flip_char(tty, c, flag); - } - - tty_flip_buffer_push(tty); -} - -static void handle_tx(struct uart_port *port) -{ - struct circ_buf *xmit = &port->state->xmit; - struct msm_port *msm_port = UART_TO_MSM(port); - int sent_tx; - - if (port->x_char) { - msm_write(port, port->x_char, UART_TF); - port->icount.tx++; - port->x_char = 0; - } - - while (msm_read(port, UART_SR) & UART_SR_TX_READY) { - if (uart_circ_empty(xmit)) { - /* disable tx interrupts */ - msm_port->imr &= ~UART_IMR_TXLEV; - msm_write(port, msm_port->imr, UART_IMR); - break; - } - - msm_write(port, xmit->buf[xmit->tail], UART_TF); - - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - sent_tx = 1; - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); -} - -static void handle_delta_cts(struct uart_port *port) -{ - msm_write(port, UART_CR_CMD_RESET_CTS, UART_CR); - port->icount.cts++; - wake_up_interruptible(&port->state->port.delta_msr_wait); -} - -static irqreturn_t msm_irq(int irq, void *dev_id) -{ - struct uart_port *port = dev_id; - struct msm_port *msm_port = UART_TO_MSM(port); - unsigned int misr; - - spin_lock(&port->lock); - misr = msm_read(port, UART_MISR); - msm_write(port, 0, UART_IMR); /* disable interrupt */ - - if (misr & (UART_IMR_RXLEV | UART_IMR_RXSTALE)) - handle_rx(port); - if (misr & UART_IMR_TXLEV) - handle_tx(port); - if (misr & UART_IMR_DELTA_CTS) - handle_delta_cts(port); - - msm_write(port, msm_port->imr, UART_IMR); /* restore interrupt */ - spin_unlock(&port->lock); - - return IRQ_HANDLED; -} - -static unsigned int msm_tx_empty(struct uart_port *port) -{ - return (msm_read(port, UART_SR) & UART_SR_TX_EMPTY) ? TIOCSER_TEMT : 0; -} - -static unsigned int msm_get_mctrl(struct uart_port *port) -{ - return TIOCM_CAR | TIOCM_CTS | TIOCM_DSR | TIOCM_RTS; -} - -static void msm_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - unsigned int mr; - - mr = msm_read(port, UART_MR1); - - if (!(mctrl & TIOCM_RTS)) { - mr &= ~UART_MR1_RX_RDY_CTL; - msm_write(port, mr, UART_MR1); - msm_write(port, UART_CR_CMD_RESET_RFR, UART_CR); - } else { - mr |= UART_MR1_RX_RDY_CTL; - msm_write(port, mr, UART_MR1); - } -} - -static void msm_break_ctl(struct uart_port *port, int break_ctl) -{ - if (break_ctl) - msm_write(port, UART_CR_CMD_START_BREAK, UART_CR); - else - msm_write(port, UART_CR_CMD_STOP_BREAK, UART_CR); -} - -static int msm_set_baud_rate(struct uart_port *port, unsigned int baud) -{ - unsigned int baud_code, rxstale, watermark; - - switch (baud) { - case 300: - baud_code = UART_CSR_300; - rxstale = 1; - break; - case 600: - baud_code = UART_CSR_600; - rxstale = 1; - break; - case 1200: - baud_code = UART_CSR_1200; - rxstale = 1; - break; - case 2400: - baud_code = UART_CSR_2400; - rxstale = 1; - break; - case 4800: - baud_code = UART_CSR_4800; - rxstale = 1; - break; - case 9600: - baud_code = UART_CSR_9600; - rxstale = 2; - break; - case 14400: - baud_code = UART_CSR_14400; - rxstale = 3; - break; - case 19200: - baud_code = UART_CSR_19200; - rxstale = 4; - break; - case 28800: - baud_code = UART_CSR_28800; - rxstale = 6; - break; - case 38400: - baud_code = UART_CSR_38400; - rxstale = 8; - break; - case 57600: - baud_code = UART_CSR_57600; - rxstale = 16; - break; - case 115200: - default: - baud_code = UART_CSR_115200; - baud = 115200; - rxstale = 31; - break; - } - - msm_write(port, baud_code, UART_CSR); - - /* RX stale watermark */ - watermark = UART_IPR_STALE_LSB & rxstale; - watermark |= UART_IPR_RXSTALE_LAST; - watermark |= UART_IPR_STALE_TIMEOUT_MSB & (rxstale << 2); - msm_write(port, watermark, UART_IPR); - - /* set RX watermark */ - watermark = (port->fifosize * 3) / 4; - msm_write(port, watermark, UART_RFWR); - - /* set TX watermark */ - msm_write(port, 10, UART_TFWR); - - return baud; -} - -static void msm_reset(struct uart_port *port) -{ - /* reset everything */ - msm_write(port, UART_CR_CMD_RESET_RX, UART_CR); - msm_write(port, UART_CR_CMD_RESET_TX, UART_CR); - msm_write(port, UART_CR_CMD_RESET_ERR, UART_CR); - msm_write(port, UART_CR_CMD_RESET_BREAK_INT, UART_CR); - msm_write(port, UART_CR_CMD_RESET_CTS, UART_CR); - msm_write(port, UART_CR_CMD_SET_RFR, UART_CR); -} - -static void msm_init_clock(struct uart_port *port) -{ - struct msm_port *msm_port = UART_TO_MSM(port); - - clk_enable(msm_port->clk); - msm_serial_set_mnd_regs(port); -} - -static int msm_startup(struct uart_port *port) -{ - struct msm_port *msm_port = UART_TO_MSM(port); - unsigned int data, rfr_level; - int ret; - - snprintf(msm_port->name, sizeof(msm_port->name), - "msm_serial%d", port->line); - - ret = request_irq(port->irq, msm_irq, IRQF_TRIGGER_HIGH, - msm_port->name, port); - if (unlikely(ret)) - return ret; - - msm_init_clock(port); - - if (likely(port->fifosize > 12)) - rfr_level = port->fifosize - 12; - else - rfr_level = port->fifosize; - - /* set automatic RFR level */ - data = msm_read(port, UART_MR1); - data &= ~UART_MR1_AUTO_RFR_LEVEL1; - data &= ~UART_MR1_AUTO_RFR_LEVEL0; - data |= UART_MR1_AUTO_RFR_LEVEL1 & (rfr_level << 2); - data |= UART_MR1_AUTO_RFR_LEVEL0 & rfr_level; - msm_write(port, data, UART_MR1); - - /* make sure that RXSTALE count is non-zero */ - data = msm_read(port, UART_IPR); - if (unlikely(!data)) { - data |= UART_IPR_RXSTALE_LAST; - data |= UART_IPR_STALE_LSB; - msm_write(port, data, UART_IPR); - } - - msm_reset(port); - - msm_write(port, 0x05, UART_CR); /* enable TX & RX */ - - /* turn on RX and CTS interrupts */ - msm_port->imr = UART_IMR_RXLEV | UART_IMR_RXSTALE | - UART_IMR_CURRENT_CTS; - msm_write(port, msm_port->imr, UART_IMR); - - return 0; -} - -static void msm_shutdown(struct uart_port *port) -{ - struct msm_port *msm_port = UART_TO_MSM(port); - - msm_port->imr = 0; - msm_write(port, 0, UART_IMR); /* disable interrupts */ - - clk_disable(msm_port->clk); - - free_irq(port->irq, port); -} - -static void msm_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - unsigned long flags; - unsigned int baud, mr; - - spin_lock_irqsave(&port->lock, flags); - - /* calculate and set baud rate */ - baud = uart_get_baud_rate(port, termios, old, 300, 115200); - baud = msm_set_baud_rate(port, baud); - if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); - - /* calculate parity */ - mr = msm_read(port, UART_MR2); - mr &= ~UART_MR2_PARITY_MODE; - if (termios->c_cflag & PARENB) { - if (termios->c_cflag & PARODD) - mr |= UART_MR2_PARITY_MODE_ODD; - else if (termios->c_cflag & CMSPAR) - mr |= UART_MR2_PARITY_MODE_SPACE; - else - mr |= UART_MR2_PARITY_MODE_EVEN; - } - - /* calculate bits per char */ - mr &= ~UART_MR2_BITS_PER_CHAR; - switch (termios->c_cflag & CSIZE) { - case CS5: - mr |= UART_MR2_BITS_PER_CHAR_5; - break; - case CS6: - mr |= UART_MR2_BITS_PER_CHAR_6; - break; - case CS7: - mr |= UART_MR2_BITS_PER_CHAR_7; - break; - case CS8: - default: - mr |= UART_MR2_BITS_PER_CHAR_8; - break; - } - - /* calculate stop bits */ - mr &= ~(UART_MR2_STOP_BIT_LEN_ONE | UART_MR2_STOP_BIT_LEN_TWO); - if (termios->c_cflag & CSTOPB) - mr |= UART_MR2_STOP_BIT_LEN_TWO; - else - mr |= UART_MR2_STOP_BIT_LEN_ONE; - - /* set parity, bits per char, and stop bit */ - msm_write(port, mr, UART_MR2); - - /* calculate and set hardware flow control */ - mr = msm_read(port, UART_MR1); - mr &= ~(UART_MR1_CTS_CTL | UART_MR1_RX_RDY_CTL); - if (termios->c_cflag & CRTSCTS) { - mr |= UART_MR1_CTS_CTL; - mr |= UART_MR1_RX_RDY_CTL; - } - msm_write(port, mr, UART_MR1); - - /* Configure status bits to ignore based on termio flags. */ - port->read_status_mask = 0; - if (termios->c_iflag & INPCK) - port->read_status_mask |= UART_SR_PAR_FRAME_ERR; - if (termios->c_iflag & (BRKINT | PARMRK)) - port->read_status_mask |= UART_SR_RX_BREAK; - - uart_update_timeout(port, termios->c_cflag, baud); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *msm_type(struct uart_port *port) -{ - return "MSM"; -} - -static void msm_release_port(struct uart_port *port) -{ - struct platform_device *pdev = to_platform_device(port->dev); - struct resource *resource; - resource_size_t size; - - resource = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (unlikely(!resource)) - return; - size = resource->end - resource->start + 1; - - release_mem_region(port->mapbase, size); - iounmap(port->membase); - port->membase = NULL; -} - -static int msm_request_port(struct uart_port *port) -{ - struct platform_device *pdev = to_platform_device(port->dev); - struct resource *resource; - resource_size_t size; - - resource = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (unlikely(!resource)) - return -ENXIO; - size = resource->end - resource->start + 1; - - if (unlikely(!request_mem_region(port->mapbase, size, "msm_serial"))) - return -EBUSY; - - port->membase = ioremap(port->mapbase, size); - if (!port->membase) { - release_mem_region(port->mapbase, size); - return -EBUSY; - } - - return 0; -} - -static void msm_config_port(struct uart_port *port, int flags) -{ - if (flags & UART_CONFIG_TYPE) { - port->type = PORT_MSM; - msm_request_port(port); - } -} - -static int msm_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - if (unlikely(ser->type != PORT_UNKNOWN && ser->type != PORT_MSM)) - return -EINVAL; - if (unlikely(port->irq != ser->irq)) - return -EINVAL; - return 0; -} - -static void msm_power(struct uart_port *port, unsigned int state, - unsigned int oldstate) -{ - struct msm_port *msm_port = UART_TO_MSM(port); - - switch (state) { - case 0: - clk_enable(msm_port->clk); - break; - case 3: - clk_disable(msm_port->clk); - break; - default: - printk(KERN_ERR "msm_serial: Unknown PM state %d\n", state); - } -} - -static struct uart_ops msm_uart_pops = { - .tx_empty = msm_tx_empty, - .set_mctrl = msm_set_mctrl, - .get_mctrl = msm_get_mctrl, - .stop_tx = msm_stop_tx, - .start_tx = msm_start_tx, - .stop_rx = msm_stop_rx, - .enable_ms = msm_enable_ms, - .break_ctl = msm_break_ctl, - .startup = msm_startup, - .shutdown = msm_shutdown, - .set_termios = msm_set_termios, - .type = msm_type, - .release_port = msm_release_port, - .request_port = msm_request_port, - .config_port = msm_config_port, - .verify_port = msm_verify_port, - .pm = msm_power, -}; - -static struct msm_port msm_uart_ports[] = { - { - .uart = { - .iotype = UPIO_MEM, - .ops = &msm_uart_pops, - .flags = UPF_BOOT_AUTOCONF, - .fifosize = 512, - .line = 0, - }, - }, - { - .uart = { - .iotype = UPIO_MEM, - .ops = &msm_uart_pops, - .flags = UPF_BOOT_AUTOCONF, - .fifosize = 512, - .line = 1, - }, - }, - { - .uart = { - .iotype = UPIO_MEM, - .ops = &msm_uart_pops, - .flags = UPF_BOOT_AUTOCONF, - .fifosize = 64, - .line = 2, - }, - }, -}; - -#define UART_NR ARRAY_SIZE(msm_uart_ports) - -static inline struct uart_port *get_port_from_line(unsigned int line) -{ - return &msm_uart_ports[line].uart; -} - -#ifdef CONFIG_SERIAL_MSM_CONSOLE - -static void msm_console_putchar(struct uart_port *port, int c) -{ - while (!(msm_read(port, UART_SR) & UART_SR_TX_READY)) - ; - msm_write(port, c, UART_TF); -} - -static void msm_console_write(struct console *co, const char *s, - unsigned int count) -{ - struct uart_port *port; - struct msm_port *msm_port; - - BUG_ON(co->index < 0 || co->index >= UART_NR); - - port = get_port_from_line(co->index); - msm_port = UART_TO_MSM(port); - - spin_lock(&port->lock); - uart_console_write(port, s, count, msm_console_putchar); - spin_unlock(&port->lock); -} - -static int __init msm_console_setup(struct console *co, char *options) -{ - struct uart_port *port; - int baud, flow, bits, parity; - - if (unlikely(co->index >= UART_NR || co->index < 0)) - return -ENXIO; - - port = get_port_from_line(co->index); - - if (unlikely(!port->membase)) - return -ENXIO; - - port->cons = co; - - msm_init_clock(port); - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - bits = 8; - parity = 'n'; - flow = 'n'; - msm_write(port, UART_MR2_BITS_PER_CHAR_8 | UART_MR2_STOP_BIT_LEN_ONE, - UART_MR2); /* 8N1 */ - - if (baud < 300 || baud > 115200) - baud = 115200; - msm_set_baud_rate(port, baud); - - msm_reset(port); - - printk(KERN_INFO "msm_serial: console setup on port #%d\n", port->line); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - -static struct uart_driver msm_uart_driver; - -static struct console msm_console = { - .name = "ttyMSM", - .write = msm_console_write, - .device = uart_console_device, - .setup = msm_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &msm_uart_driver, -}; - -#define MSM_CONSOLE (&msm_console) - -#else -#define MSM_CONSOLE NULL -#endif - -static struct uart_driver msm_uart_driver = { - .owner = THIS_MODULE, - .driver_name = "msm_serial", - .dev_name = "ttyMSM", - .nr = UART_NR, - .cons = MSM_CONSOLE, -}; - -static int __init msm_serial_probe(struct platform_device *pdev) -{ - struct msm_port *msm_port; - struct resource *resource; - struct uart_port *port; - int irq; - - if (unlikely(pdev->id < 0 || pdev->id >= UART_NR)) - return -ENXIO; - - printk(KERN_INFO "msm_serial: detected port #%d\n", pdev->id); - - port = get_port_from_line(pdev->id); - port->dev = &pdev->dev; - msm_port = UART_TO_MSM(port); - - msm_port->clk = clk_get(&pdev->dev, "uart_clk"); - if (IS_ERR(msm_port->clk)) - return PTR_ERR(msm_port->clk); - port->uartclk = clk_get_rate(msm_port->clk); - printk(KERN_INFO "uartclk = %d\n", port->uartclk); - - - resource = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (unlikely(!resource)) - return -ENXIO; - port->mapbase = resource->start; - - irq = platform_get_irq(pdev, 0); - if (unlikely(irq < 0)) - return -ENXIO; - port->irq = irq; - - platform_set_drvdata(pdev, port); - - return uart_add_one_port(&msm_uart_driver, port); -} - -static int __devexit msm_serial_remove(struct platform_device *pdev) -{ - struct msm_port *msm_port = platform_get_drvdata(pdev); - - clk_put(msm_port->clk); - - return 0; -} - -static struct platform_driver msm_platform_driver = { - .remove = msm_serial_remove, - .driver = { - .name = "msm_serial", - .owner = THIS_MODULE, - }, -}; - -static int __init msm_serial_init(void) -{ - int ret; - - ret = uart_register_driver(&msm_uart_driver); - if (unlikely(ret)) - return ret; - - ret = platform_driver_probe(&msm_platform_driver, msm_serial_probe); - if (unlikely(ret)) - uart_unregister_driver(&msm_uart_driver); - - printk(KERN_INFO "msm_serial: driver initialized\n"); - - return ret; -} - -static void __exit msm_serial_exit(void) -{ -#ifdef CONFIG_SERIAL_MSM_CONSOLE - unregister_console(&msm_console); -#endif - platform_driver_unregister(&msm_platform_driver); - uart_unregister_driver(&msm_uart_driver); -} - -module_init(msm_serial_init); -module_exit(msm_serial_exit); - -MODULE_AUTHOR("Robert Love <rlove@google.com>"); -MODULE_DESCRIPTION("Driver for msm7x serial device"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/msm_serial.h b/drivers/serial/msm_serial.h deleted file mode 100644 index f6ca9ca79e98..000000000000 --- a/drivers/serial/msm_serial.h +++ /dev/null @@ -1,173 +0,0 @@ -/* - * drivers/serial/msm_serial.h - * - * Copyright (C) 2007 Google, Inc. - * Author: Robert Love <rlove@google.com> - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#ifndef __DRIVERS_SERIAL_MSM_SERIAL_H -#define __DRIVERS_SERIAL_MSM_SERIAL_H - -#define UART_MR1 0x0000 - -#define UART_MR1_AUTO_RFR_LEVEL0 0x3F -#define UART_MR1_AUTO_RFR_LEVEL1 0x3FF00 -#define UART_MR1_RX_RDY_CTL (1 << 7) -#define UART_MR1_CTS_CTL (1 << 6) - -#define UART_MR2 0x0004 -#define UART_MR2_ERROR_MODE (1 << 6) -#define UART_MR2_BITS_PER_CHAR 0x30 -#define UART_MR2_BITS_PER_CHAR_5 (0x0 << 4) -#define UART_MR2_BITS_PER_CHAR_6 (0x1 << 4) -#define UART_MR2_BITS_PER_CHAR_7 (0x2 << 4) -#define UART_MR2_BITS_PER_CHAR_8 (0x3 << 4) -#define UART_MR2_STOP_BIT_LEN_ONE (0x1 << 2) -#define UART_MR2_STOP_BIT_LEN_TWO (0x3 << 2) -#define UART_MR2_PARITY_MODE_NONE 0x0 -#define UART_MR2_PARITY_MODE_ODD 0x1 -#define UART_MR2_PARITY_MODE_EVEN 0x2 -#define UART_MR2_PARITY_MODE_SPACE 0x3 -#define UART_MR2_PARITY_MODE 0x3 - -#define UART_CSR 0x0008 -#define UART_CSR_115200 0xFF -#define UART_CSR_57600 0xEE -#define UART_CSR_38400 0xDD -#define UART_CSR_28800 0xCC -#define UART_CSR_19200 0xBB -#define UART_CSR_14400 0xAA -#define UART_CSR_9600 0x99 -#define UART_CSR_4800 0x77 -#define UART_CSR_2400 0x55 -#define UART_CSR_1200 0x44 -#define UART_CSR_600 0x33 -#define UART_CSR_300 0x22 - -#define UART_TF 0x000C - -#define UART_CR 0x0010 -#define UART_CR_CMD_NULL (0 << 4) -#define UART_CR_CMD_RESET_RX (1 << 4) -#define UART_CR_CMD_RESET_TX (2 << 4) -#define UART_CR_CMD_RESET_ERR (3 << 4) -#define UART_CR_CMD_RESET_BREAK_INT (4 << 4) -#define UART_CR_CMD_START_BREAK (5 << 4) -#define UART_CR_CMD_STOP_BREAK (6 << 4) -#define UART_CR_CMD_RESET_CTS (7 << 4) -#define UART_CR_CMD_PACKET_MODE (9 << 4) -#define UART_CR_CMD_MODE_RESET (12 << 4) -#define UART_CR_CMD_SET_RFR (13 << 4) -#define UART_CR_CMD_RESET_RFR (14 << 4) -#define UART_CR_TX_DISABLE (1 << 3) -#define UART_CR_TX_ENABLE (1 << 3) -#define UART_CR_RX_DISABLE (1 << 3) -#define UART_CR_RX_ENABLE (1 << 3) - -#define UART_IMR 0x0014 -#define UART_IMR_TXLEV (1 << 0) -#define UART_IMR_RXSTALE (1 << 3) -#define UART_IMR_RXLEV (1 << 4) -#define UART_IMR_DELTA_CTS (1 << 5) -#define UART_IMR_CURRENT_CTS (1 << 6) - -#define UART_IPR_RXSTALE_LAST 0x20 -#define UART_IPR_STALE_LSB 0x1F -#define UART_IPR_STALE_TIMEOUT_MSB 0x3FF80 - -#define UART_IPR 0x0018 -#define UART_TFWR 0x001C -#define UART_RFWR 0x0020 -#define UART_HCR 0x0024 - -#define UART_MREG 0x0028 -#define UART_NREG 0x002C -#define UART_DREG 0x0030 -#define UART_MNDREG 0x0034 -#define UART_IRDA 0x0038 -#define UART_MISR_MODE 0x0040 -#define UART_MISR_RESET 0x0044 -#define UART_MISR_EXPORT 0x0048 -#define UART_MISR_VAL 0x004C -#define UART_TEST_CTRL 0x0050 - -#define UART_SR 0x0008 -#define UART_SR_HUNT_CHAR (1 << 7) -#define UART_SR_RX_BREAK (1 << 6) -#define UART_SR_PAR_FRAME_ERR (1 << 5) -#define UART_SR_OVERRUN (1 << 4) -#define UART_SR_TX_EMPTY (1 << 3) -#define UART_SR_TX_READY (1 << 2) -#define UART_SR_RX_FULL (1 << 1) -#define UART_SR_RX_READY (1 << 0) - -#define UART_RF 0x000C -#define UART_MISR 0x0010 -#define UART_ISR 0x0014 - -#define UART_TO_MSM(uart_port) ((struct msm_port *) uart_port) - -static inline -void msm_write(struct uart_port *port, unsigned int val, unsigned int off) -{ - __raw_writel(val, port->membase + off); -} - -static inline -unsigned int msm_read(struct uart_port *port, unsigned int off) -{ - return __raw_readl(port->membase + off); -} - -/* - * Setup the MND registers to use the TCXO clock. - */ -static inline void msm_serial_set_mnd_regs_tcxo(struct uart_port *port) -{ - msm_write(port, 0x06, UART_MREG); - msm_write(port, 0xF1, UART_NREG); - msm_write(port, 0x0F, UART_DREG); - msm_write(port, 0x1A, UART_MNDREG); -} - -/* - * Setup the MND registers to use the TCXO clock divided by 4. - */ -static inline void msm_serial_set_mnd_regs_tcxoby4(struct uart_port *port) -{ - msm_write(port, 0x18, UART_MREG); - msm_write(port, 0xF6, UART_NREG); - msm_write(port, 0x0F, UART_DREG); - msm_write(port, 0x0A, UART_MNDREG); -} - -static inline -void msm_serial_set_mnd_regs_from_uartclk(struct uart_port *port) -{ - if (port->uartclk == 19200000) - msm_serial_set_mnd_regs_tcxo(port); - else - msm_serial_set_mnd_regs_tcxoby4(port); -} - -/* - * TROUT has a specific defect that makes it report it's uartclk - * as 19.2Mhz (TCXO) when it's actually 4.8Mhz (TCXO/4). This special - * cases TROUT to use the right clock. - */ -#ifdef CONFIG_MACH_TROUT -#define msm_serial_set_mnd_regs msm_serial_set_mnd_regs_tcxoby4 -#else -#define msm_serial_set_mnd_regs msm_serial_set_mnd_regs_from_uartclk -#endif - -#endif /* __DRIVERS_SERIAL_MSM_SERIAL_H */ diff --git a/drivers/serial/mux.c b/drivers/serial/mux.c deleted file mode 100644 index 9711e06a8374..000000000000 --- a/drivers/serial/mux.c +++ /dev/null @@ -1,633 +0,0 @@ -/* -** mux.c: -** serial driver for the Mux console found in some PA-RISC servers. -** -** (c) Copyright 2002 Ryan Bradetich -** (c) Copyright 2002 Hewlett-Packard Company -** -** This program is free software; you can redistribute it and/or modify -** it under the terms of the GNU General Public License as published by -** the Free Software Foundation; either version 2 of the License, or -** (at your option) any later version. -** -** This Driver currently only supports the console (port 0) on the MUX. -** Additional work will be needed on this driver to enable the full -** functionality of the MUX. -** -*/ - -#include <linux/module.h> -#include <linux/tty.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/serial.h> -#include <linux/console.h> -#include <linux/delay.h> /* for udelay */ -#include <linux/device.h> -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/parisc-device.h> - -#ifdef CONFIG_MAGIC_SYSRQ -#include <linux/sysrq.h> -#define SUPPORT_SYSRQ -#endif - -#include <linux/serial_core.h> - -#define MUX_OFFSET 0x800 -#define MUX_LINE_OFFSET 0x80 - -#define MUX_FIFO_SIZE 255 -#define MUX_POLL_DELAY (30 * HZ / 1000) - -#define IO_DATA_REG_OFFSET 0x3c -#define IO_DCOUNT_REG_OFFSET 0x40 - -#define MUX_EOFIFO(status) ((status & 0xF000) == 0xF000) -#define MUX_STATUS(status) ((status & 0xF000) == 0x8000) -#define MUX_BREAK(status) ((status & 0xF000) == 0x2000) - -#define MUX_NR 256 -static unsigned int port_cnt __read_mostly; -struct mux_port { - struct uart_port port; - int enabled; -}; -static struct mux_port mux_ports[MUX_NR]; - -static struct uart_driver mux_driver = { - .owner = THIS_MODULE, - .driver_name = "ttyB", - .dev_name = "ttyB", - .major = MUX_MAJOR, - .minor = 0, - .nr = MUX_NR, -}; - -static struct timer_list mux_timer; - -#define UART_PUT_CHAR(p, c) __raw_writel((c), (p)->membase + IO_DATA_REG_OFFSET) -#define UART_GET_FIFO_CNT(p) __raw_readl((p)->membase + IO_DCOUNT_REG_OFFSET) - -/** - * get_mux_port_count - Get the number of available ports on the Mux. - * @dev: The parisc device. - * - * This function is used to determine the number of ports the Mux - * supports. The IODC data reports the number of ports the Mux - * can support, but there are cases where not all the Mux ports - * are connected. This function can override the IODC and - * return the true port count. - */ -static int __init get_mux_port_count(struct parisc_device *dev) -{ - int status; - u8 iodc_data[32]; - unsigned long bytecnt; - - /* If this is the built-in Mux for the K-Class (Eole CAP/MUX), - * we only need to allocate resources for 1 port since the - * other 7 ports are not connected. - */ - if(dev->id.hversion == 0x15) - return 1; - - status = pdc_iodc_read(&bytecnt, dev->hpa.start, 0, iodc_data, 32); - BUG_ON(status != PDC_OK); - - /* Return the number of ports specified in the iodc data. */ - return ((((iodc_data)[4] & 0xf0) >> 4) * 8) + 8; -} - -/** - * mux_tx_empty - Check if the transmitter fifo is empty. - * @port: Ptr to the uart_port. - * - * This function test if the transmitter fifo for the port - * described by 'port' is empty. If it is empty, this function - * should return TIOCSER_TEMT, otherwise return 0. - */ -static unsigned int mux_tx_empty(struct uart_port *port) -{ - return UART_GET_FIFO_CNT(port) ? 0 : TIOCSER_TEMT; -} - -/** - * mux_set_mctrl - Set the current state of the modem control inputs. - * @ports: Ptr to the uart_port. - * @mctrl: Modem control bits. - * - * The Serial MUX does not support CTS, DCD or DSR so this function - * is ignored. - */ -static void mux_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ -} - -/** - * mux_get_mctrl - Returns the current state of modem control inputs. - * @port: Ptr to the uart_port. - * - * The Serial MUX does not support CTS, DCD or DSR so these lines are - * treated as permanently active. - */ -static unsigned int mux_get_mctrl(struct uart_port *port) -{ - return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; -} - -/** - * mux_stop_tx - Stop transmitting characters. - * @port: Ptr to the uart_port. - * - * The Serial MUX does not support this function. - */ -static void mux_stop_tx(struct uart_port *port) -{ -} - -/** - * mux_start_tx - Start transmitting characters. - * @port: Ptr to the uart_port. - * - * The Serial Mux does not support this function. - */ -static void mux_start_tx(struct uart_port *port) -{ -} - -/** - * mux_stop_rx - Stop receiving characters. - * @port: Ptr to the uart_port. - * - * The Serial Mux does not support this function. - */ -static void mux_stop_rx(struct uart_port *port) -{ -} - -/** - * mux_enable_ms - Enable modum status interrupts. - * @port: Ptr to the uart_port. - * - * The Serial Mux does not support this function. - */ -static void mux_enable_ms(struct uart_port *port) -{ -} - -/** - * mux_break_ctl - Control the transmitssion of a break signal. - * @port: Ptr to the uart_port. - * @break_state: Raise/Lower the break signal. - * - * The Serial Mux does not support this function. - */ -static void mux_break_ctl(struct uart_port *port, int break_state) -{ -} - -/** - * mux_write - Write chars to the mux fifo. - * @port: Ptr to the uart_port. - * - * This function writes all the data from the uart buffer to - * the mux fifo. - */ -static void mux_write(struct uart_port *port) -{ - int count; - struct circ_buf *xmit = &port->state->xmit; - - if(port->x_char) { - UART_PUT_CHAR(port, port->x_char); - port->icount.tx++; - port->x_char = 0; - return; - } - - if(uart_circ_empty(xmit) || uart_tx_stopped(port)) { - mux_stop_tx(port); - return; - } - - count = (port->fifosize) - UART_GET_FIFO_CNT(port); - do { - UART_PUT_CHAR(port, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - if(uart_circ_empty(xmit)) - break; - - } while(--count > 0); - - while(UART_GET_FIFO_CNT(port)) - udelay(1); - - if(uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (uart_circ_empty(xmit)) - mux_stop_tx(port); -} - -/** - * mux_read - Read chars from the mux fifo. - * @port: Ptr to the uart_port. - * - * This reads all available data from the mux's fifo and pushes - * the data to the tty layer. - */ -static void mux_read(struct uart_port *port) -{ - int data; - struct tty_struct *tty = port->state->port.tty; - __u32 start_count = port->icount.rx; - - while(1) { - data = __raw_readl(port->membase + IO_DATA_REG_OFFSET); - - if (MUX_STATUS(data)) - continue; - - if (MUX_EOFIFO(data)) - break; - - port->icount.rx++; - - if (MUX_BREAK(data)) { - port->icount.brk++; - if(uart_handle_break(port)) - continue; - } - - if (uart_handle_sysrq_char(port, data & 0xffu)) - continue; - - tty_insert_flip_char(tty, data & 0xFF, TTY_NORMAL); - } - - if (start_count != port->icount.rx) { - tty_flip_buffer_push(tty); - } -} - -/** - * mux_startup - Initialize the port. - * @port: Ptr to the uart_port. - * - * Grab any resources needed for this port and start the - * mux timer. - */ -static int mux_startup(struct uart_port *port) -{ - mux_ports[port->line].enabled = 1; - return 0; -} - -/** - * mux_shutdown - Disable the port. - * @port: Ptr to the uart_port. - * - * Release any resources needed for the port. - */ -static void mux_shutdown(struct uart_port *port) -{ - mux_ports[port->line].enabled = 0; -} - -/** - * mux_set_termios - Chane port parameters. - * @port: Ptr to the uart_port. - * @termios: new termios settings. - * @old: old termios settings. - * - * The Serial Mux does not support this function. - */ -static void -mux_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ -} - -/** - * mux_type - Describe the port. - * @port: Ptr to the uart_port. - * - * Return a pointer to a string constant describing the - * specified port. - */ -static const char *mux_type(struct uart_port *port) -{ - return "Mux"; -} - -/** - * mux_release_port - Release memory and IO regions. - * @port: Ptr to the uart_port. - * - * Release any memory and IO region resources currently in use by - * the port. - */ -static void mux_release_port(struct uart_port *port) -{ -} - -/** - * mux_request_port - Request memory and IO regions. - * @port: Ptr to the uart_port. - * - * Request any memory and IO region resources required by the port. - * If any fail, no resources should be registered when this function - * returns, and it should return -EBUSY on failure. - */ -static int mux_request_port(struct uart_port *port) -{ - return 0; -} - -/** - * mux_config_port - Perform port autoconfiguration. - * @port: Ptr to the uart_port. - * @type: Bitmask of required configurations. - * - * Perform any autoconfiguration steps for the port. This function is - * called if the UPF_BOOT_AUTOCONF flag is specified for the port. - * [Note: This is required for now because of a bug in the Serial core. - * rmk has already submitted a patch to linus, should be available for - * 2.5.47.] - */ -static void mux_config_port(struct uart_port *port, int type) -{ - port->type = PORT_MUX; -} - -/** - * mux_verify_port - Verify the port information. - * @port: Ptr to the uart_port. - * @ser: Ptr to the serial information. - * - * Verify the new serial port information contained within serinfo is - * suitable for this port type. - */ -static int mux_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - if(port->membase == NULL) - return -EINVAL; - - return 0; -} - -/** - * mux_drv_poll - Mux poll function. - * @unused: Unused variable - * - * This function periodically polls the Serial MUX to check for new data. - */ -static void mux_poll(unsigned long unused) -{ - int i; - - for(i = 0; i < port_cnt; ++i) { - if(!mux_ports[i].enabled) - continue; - - mux_read(&mux_ports[i].port); - mux_write(&mux_ports[i].port); - } - - mod_timer(&mux_timer, jiffies + MUX_POLL_DELAY); -} - - -#ifdef CONFIG_SERIAL_MUX_CONSOLE -static void mux_console_write(struct console *co, const char *s, unsigned count) -{ - /* Wait until the FIFO drains. */ - while(UART_GET_FIFO_CNT(&mux_ports[0].port)) - udelay(1); - - while(count--) { - if(*s == '\n') { - UART_PUT_CHAR(&mux_ports[0].port, '\r'); - } - UART_PUT_CHAR(&mux_ports[0].port, *s++); - } - -} - -static int mux_console_setup(struct console *co, char *options) -{ - return 0; -} - -struct tty_driver *mux_console_device(struct console *co, int *index) -{ - *index = co->index; - return mux_driver.tty_driver; -} - -static struct console mux_console = { - .name = "ttyB", - .write = mux_console_write, - .device = mux_console_device, - .setup = mux_console_setup, - .flags = CON_ENABLED | CON_PRINTBUFFER, - .index = 0, -}; - -#define MUX_CONSOLE &mux_console -#else -#define MUX_CONSOLE NULL -#endif - -static struct uart_ops mux_pops = { - .tx_empty = mux_tx_empty, - .set_mctrl = mux_set_mctrl, - .get_mctrl = mux_get_mctrl, - .stop_tx = mux_stop_tx, - .start_tx = mux_start_tx, - .stop_rx = mux_stop_rx, - .enable_ms = mux_enable_ms, - .break_ctl = mux_break_ctl, - .startup = mux_startup, - .shutdown = mux_shutdown, - .set_termios = mux_set_termios, - .type = mux_type, - .release_port = mux_release_port, - .request_port = mux_request_port, - .config_port = mux_config_port, - .verify_port = mux_verify_port, -}; - -/** - * mux_probe - Determine if the Serial Mux should claim this device. - * @dev: The parisc device. - * - * Deterimine if the Serial Mux should claim this chip (return 0) - * or not (return 1). - */ -static int __init mux_probe(struct parisc_device *dev) -{ - int i, status; - - int port_count = get_mux_port_count(dev); - printk(KERN_INFO "Serial mux driver (%d ports) Revision: 0.6\n", port_count); - - dev_set_drvdata(&dev->dev, (void *)(long)port_count); - request_mem_region(dev->hpa.start + MUX_OFFSET, - port_count * MUX_LINE_OFFSET, "Mux"); - - if(!port_cnt) { - mux_driver.cons = MUX_CONSOLE; - - status = uart_register_driver(&mux_driver); - if(status) { - printk(KERN_ERR "Serial mux: Unable to register driver.\n"); - return 1; - } - } - - for(i = 0; i < port_count; ++i, ++port_cnt) { - struct uart_port *port = &mux_ports[port_cnt].port; - port->iobase = 0; - port->mapbase = dev->hpa.start + MUX_OFFSET + - (i * MUX_LINE_OFFSET); - port->membase = ioremap_nocache(port->mapbase, MUX_LINE_OFFSET); - port->iotype = UPIO_MEM; - port->type = PORT_MUX; - port->irq = NO_IRQ; - port->uartclk = 0; - port->fifosize = MUX_FIFO_SIZE; - port->ops = &mux_pops; - port->flags = UPF_BOOT_AUTOCONF; - port->line = port_cnt; - - /* The port->timeout needs to match what is present in - * uart_wait_until_sent in serial_core.c. Otherwise - * the time spent in msleep_interruptable will be very - * long, causing the appearance of a console hang. - */ - port->timeout = HZ / 50; - spin_lock_init(&port->lock); - - status = uart_add_one_port(&mux_driver, port); - BUG_ON(status); - } - - return 0; -} - -static int __devexit mux_remove(struct parisc_device *dev) -{ - int i, j; - int port_count = (long)dev_get_drvdata(&dev->dev); - - /* Find Port 0 for this card in the mux_ports list. */ - for(i = 0; i < port_cnt; ++i) { - if(mux_ports[i].port.mapbase == dev->hpa.start + MUX_OFFSET) - break; - } - BUG_ON(i + port_count > port_cnt); - - /* Release the resources associated with each port on the device. */ - for(j = 0; j < port_count; ++j, ++i) { - struct uart_port *port = &mux_ports[i].port; - - uart_remove_one_port(&mux_driver, port); - if(port->membase) - iounmap(port->membase); - } - - release_mem_region(dev->hpa.start + MUX_OFFSET, port_count * MUX_LINE_OFFSET); - return 0; -} - -/* Hack. This idea was taken from the 8250_gsc.c on how to properly order - * the serial port detection in the proper order. The idea is we always - * want the builtin mux to be detected before addin mux cards, so we - * specifically probe for the builtin mux cards first. - * - * This table only contains the parisc_device_id of known builtin mux - * devices. All other mux cards will be detected by the generic mux_tbl. - */ -static struct parisc_device_id builtin_mux_tbl[] = { - { HPHW_A_DIRECT, HVERSION_REV_ANY_ID, 0x15, 0x0000D }, /* All K-class */ - { HPHW_A_DIRECT, HVERSION_REV_ANY_ID, 0x44, 0x0000D }, /* E35, E45, and E55 */ - { 0, } -}; - -static struct parisc_device_id mux_tbl[] = { - { HPHW_A_DIRECT, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0000D }, - { 0, } -}; - -MODULE_DEVICE_TABLE(parisc, builtin_mux_tbl); -MODULE_DEVICE_TABLE(parisc, mux_tbl); - -static struct parisc_driver builtin_serial_mux_driver = { - .name = "builtin_serial_mux", - .id_table = builtin_mux_tbl, - .probe = mux_probe, - .remove = __devexit_p(mux_remove), -}; - -static struct parisc_driver serial_mux_driver = { - .name = "serial_mux", - .id_table = mux_tbl, - .probe = mux_probe, - .remove = __devexit_p(mux_remove), -}; - -/** - * mux_init - Serial MUX initialization procedure. - * - * Register the Serial MUX driver. - */ -static int __init mux_init(void) -{ - register_parisc_driver(&builtin_serial_mux_driver); - register_parisc_driver(&serial_mux_driver); - - if(port_cnt > 0) { - /* Start the Mux timer */ - init_timer(&mux_timer); - mux_timer.function = mux_poll; - mod_timer(&mux_timer, jiffies + MUX_POLL_DELAY); - -#ifdef CONFIG_SERIAL_MUX_CONSOLE - register_console(&mux_console); -#endif - } - - return 0; -} - -/** - * mux_exit - Serial MUX cleanup procedure. - * - * Unregister the Serial MUX driver from the tty layer. - */ -static void __exit mux_exit(void) -{ - /* Delete the Mux timer. */ - if(port_cnt > 0) { - del_timer(&mux_timer); -#ifdef CONFIG_SERIAL_MUX_CONSOLE - unregister_console(&mux_console); -#endif - } - - unregister_parisc_driver(&builtin_serial_mux_driver); - unregister_parisc_driver(&serial_mux_driver); - uart_unregister_driver(&mux_driver); -} - -module_init(mux_init); -module_exit(mux_exit); - -MODULE_AUTHOR("Ryan Bradetich"); -MODULE_DESCRIPTION("Serial MUX driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_CHARDEV_MAJOR(MUX_MAJOR); diff --git a/drivers/serial/netx-serial.c b/drivers/serial/netx-serial.c deleted file mode 100644 index 7735c9f35fa0..000000000000 --- a/drivers/serial/netx-serial.c +++ /dev/null @@ -1,750 +0,0 @@ -/* - * drivers/serial/netx-serial.c - * - * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#if defined(CONFIG_SERIAL_NETX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/device.h> -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/platform_device.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/serial.h> - -#include <asm/io.h> -#include <asm/irq.h> -#include <mach/hardware.h> -#include <mach/netx-regs.h> - -/* We've been assigned a range on the "Low-density serial ports" major */ -#define SERIAL_NX_MAJOR 204 -#define MINOR_START 170 - -enum uart_regs { - UART_DR = 0x00, - UART_SR = 0x04, - UART_LINE_CR = 0x08, - UART_BAUDDIV_MSB = 0x0c, - UART_BAUDDIV_LSB = 0x10, - UART_CR = 0x14, - UART_FR = 0x18, - UART_IIR = 0x1c, - UART_ILPR = 0x20, - UART_RTS_CR = 0x24, - UART_RTS_LEAD = 0x28, - UART_RTS_TRAIL = 0x2c, - UART_DRV_ENABLE = 0x30, - UART_BRM_CR = 0x34, - UART_RXFIFO_IRQLEVEL = 0x38, - UART_TXFIFO_IRQLEVEL = 0x3c, -}; - -#define SR_FE (1<<0) -#define SR_PE (1<<1) -#define SR_BE (1<<2) -#define SR_OE (1<<3) - -#define LINE_CR_BRK (1<<0) -#define LINE_CR_PEN (1<<1) -#define LINE_CR_EPS (1<<2) -#define LINE_CR_STP2 (1<<3) -#define LINE_CR_FEN (1<<4) -#define LINE_CR_5BIT (0<<5) -#define LINE_CR_6BIT (1<<5) -#define LINE_CR_7BIT (2<<5) -#define LINE_CR_8BIT (3<<5) -#define LINE_CR_BITS_MASK (3<<5) - -#define CR_UART_EN (1<<0) -#define CR_SIREN (1<<1) -#define CR_SIRLP (1<<2) -#define CR_MSIE (1<<3) -#define CR_RIE (1<<4) -#define CR_TIE (1<<5) -#define CR_RTIE (1<<6) -#define CR_LBE (1<<7) - -#define FR_CTS (1<<0) -#define FR_DSR (1<<1) -#define FR_DCD (1<<2) -#define FR_BUSY (1<<3) -#define FR_RXFE (1<<4) -#define FR_TXFF (1<<5) -#define FR_RXFF (1<<6) -#define FR_TXFE (1<<7) - -#define IIR_MIS (1<<0) -#define IIR_RIS (1<<1) -#define IIR_TIS (1<<2) -#define IIR_RTIS (1<<3) -#define IIR_MASK 0xf - -#define RTS_CR_AUTO (1<<0) -#define RTS_CR_RTS (1<<1) -#define RTS_CR_COUNT (1<<2) -#define RTS_CR_MOD2 (1<<3) -#define RTS_CR_RTS_POL (1<<4) -#define RTS_CR_CTS_CTR (1<<5) -#define RTS_CR_CTS_POL (1<<6) -#define RTS_CR_STICK (1<<7) - -#define UART_PORT_SIZE 0x40 -#define DRIVER_NAME "netx-uart" - -struct netx_port { - struct uart_port port; -}; - -static void netx_stop_tx(struct uart_port *port) -{ - unsigned int val; - val = readl(port->membase + UART_CR); - writel(val & ~CR_TIE, port->membase + UART_CR); -} - -static void netx_stop_rx(struct uart_port *port) -{ - unsigned int val; - val = readl(port->membase + UART_CR); - writel(val & ~CR_RIE, port->membase + UART_CR); -} - -static void netx_enable_ms(struct uart_port *port) -{ - unsigned int val; - val = readl(port->membase + UART_CR); - writel(val | CR_MSIE, port->membase + UART_CR); -} - -static inline void netx_transmit_buffer(struct uart_port *port) -{ - struct circ_buf *xmit = &port->state->xmit; - - if (port->x_char) { - writel(port->x_char, port->membase + UART_DR); - port->icount.tx++; - port->x_char = 0; - return; - } - - if (uart_tx_stopped(port) || uart_circ_empty(xmit)) { - netx_stop_tx(port); - return; - } - - do { - /* send xmit->buf[xmit->tail] - * out the port here */ - writel(xmit->buf[xmit->tail], port->membase + UART_DR); - xmit->tail = (xmit->tail + 1) & - (UART_XMIT_SIZE - 1); - port->icount.tx++; - if (uart_circ_empty(xmit)) - break; - } while (!(readl(port->membase + UART_FR) & FR_TXFF)); - - if (uart_circ_empty(xmit)) - netx_stop_tx(port); -} - -static void netx_start_tx(struct uart_port *port) -{ - writel( - readl(port->membase + UART_CR) | CR_TIE, port->membase + UART_CR); - - if (!(readl(port->membase + UART_FR) & FR_TXFF)) - netx_transmit_buffer(port); -} - -static unsigned int netx_tx_empty(struct uart_port *port) -{ - return readl(port->membase + UART_FR) & FR_BUSY ? 0 : TIOCSER_TEMT; -} - -static void netx_txint(struct uart_port *port) -{ - struct circ_buf *xmit = &port->state->xmit; - - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - netx_stop_tx(port); - return; - } - - netx_transmit_buffer(port); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); -} - -static void netx_rxint(struct uart_port *port) -{ - unsigned char rx, flg, status; - struct tty_struct *tty = port->state->port.tty; - - while (!(readl(port->membase + UART_FR) & FR_RXFE)) { - rx = readl(port->membase + UART_DR); - flg = TTY_NORMAL; - port->icount.rx++; - status = readl(port->membase + UART_SR); - if (status & SR_BE) { - writel(0, port->membase + UART_SR); - if (uart_handle_break(port)) - continue; - } - - if (unlikely(status & (SR_FE | SR_PE | SR_OE))) { - - if (status & SR_PE) - port->icount.parity++; - else if (status & SR_FE) - port->icount.frame++; - if (status & SR_OE) - port->icount.overrun++; - - status &= port->read_status_mask; - - if (status & SR_BE) - flg = TTY_BREAK; - else if (status & SR_PE) - flg = TTY_PARITY; - else if (status & SR_FE) - flg = TTY_FRAME; - } - - if (uart_handle_sysrq_char(port, rx)) - continue; - - uart_insert_char(port, status, SR_OE, rx, flg); - } - - tty_flip_buffer_push(tty); - return; -} - -static irqreturn_t netx_int(int irq, void *dev_id) -{ - struct uart_port *port = dev_id; - unsigned long flags; - unsigned char status; - - spin_lock_irqsave(&port->lock,flags); - - status = readl(port->membase + UART_IIR) & IIR_MASK; - while (status) { - if (status & IIR_RIS) - netx_rxint(port); - if (status & IIR_TIS) - netx_txint(port); - if (status & IIR_MIS) { - if (readl(port->membase + UART_FR) & FR_CTS) - uart_handle_cts_change(port, 1); - else - uart_handle_cts_change(port, 0); - } - writel(0, port->membase + UART_IIR); - status = readl(port->membase + UART_IIR) & IIR_MASK; - } - - spin_unlock_irqrestore(&port->lock,flags); - return IRQ_HANDLED; -} - -static unsigned int netx_get_mctrl(struct uart_port *port) -{ - unsigned int ret = TIOCM_DSR | TIOCM_CAR; - - if (readl(port->membase + UART_FR) & FR_CTS) - ret |= TIOCM_CTS; - - return ret; -} - -static void netx_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - unsigned int val; - - /* FIXME: Locking needed ? */ - if (mctrl & TIOCM_RTS) { - val = readl(port->membase + UART_RTS_CR); - writel(val | RTS_CR_RTS, port->membase + UART_RTS_CR); - } -} - -static void netx_break_ctl(struct uart_port *port, int break_state) -{ - unsigned int line_cr; - spin_lock_irq(&port->lock); - - line_cr = readl(port->membase + UART_LINE_CR); - if (break_state != 0) - line_cr |= LINE_CR_BRK; - else - line_cr &= ~LINE_CR_BRK; - writel(line_cr, port->membase + UART_LINE_CR); - - spin_unlock_irq(&port->lock); -} - -static int netx_startup(struct uart_port *port) -{ - int ret; - - ret = request_irq(port->irq, netx_int, 0, - DRIVER_NAME, port); - if (ret) { - dev_err(port->dev, "unable to grab irq%d\n",port->irq); - goto exit; - } - - writel(readl(port->membase + UART_LINE_CR) | LINE_CR_FEN, - port->membase + UART_LINE_CR); - - writel(CR_MSIE | CR_RIE | CR_TIE | CR_RTIE | CR_UART_EN, - port->membase + UART_CR); - -exit: - return ret; -} - -static void netx_shutdown(struct uart_port *port) -{ - writel(0, port->membase + UART_CR) ; - - free_irq(port->irq, port); -} - -static void -netx_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - unsigned int baud, quot; - unsigned char old_cr; - unsigned char line_cr = LINE_CR_FEN; - unsigned char rts_cr = 0; - - switch (termios->c_cflag & CSIZE) { - case CS5: - line_cr |= LINE_CR_5BIT; - break; - case CS6: - line_cr |= LINE_CR_6BIT; - break; - case CS7: - line_cr |= LINE_CR_7BIT; - break; - case CS8: - line_cr |= LINE_CR_8BIT; - break; - } - - if (termios->c_cflag & CSTOPB) - line_cr |= LINE_CR_STP2; - - if (termios->c_cflag & PARENB) { - line_cr |= LINE_CR_PEN; - if (!(termios->c_cflag & PARODD)) - line_cr |= LINE_CR_EPS; - } - - if (termios->c_cflag & CRTSCTS) - rts_cr = RTS_CR_AUTO | RTS_CR_CTS_CTR | RTS_CR_RTS_POL; - - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); - quot = baud * 4096; - quot /= 1000; - quot *= 256; - quot /= 100000; - - spin_lock_irq(&port->lock); - - uart_update_timeout(port, termios->c_cflag, baud); - - old_cr = readl(port->membase + UART_CR); - - /* disable interrupts */ - writel(old_cr & ~(CR_MSIE | CR_RIE | CR_TIE | CR_RTIE), - port->membase + UART_CR); - - /* drain transmitter */ - while (readl(port->membase + UART_FR) & FR_BUSY); - - /* disable UART */ - writel(old_cr & ~CR_UART_EN, port->membase + UART_CR); - - /* modem status interrupts */ - old_cr &= ~CR_MSIE; - if (UART_ENABLE_MS(port, termios->c_cflag)) - old_cr |= CR_MSIE; - - writel((quot>>8) & 0xff, port->membase + UART_BAUDDIV_MSB); - writel(quot & 0xff, port->membase + UART_BAUDDIV_LSB); - writel(line_cr, port->membase + UART_LINE_CR); - - writel(rts_cr, port->membase + UART_RTS_CR); - - /* - * Characters to ignore - */ - port->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= SR_PE; - if (termios->c_iflag & IGNBRK) { - port->ignore_status_mask |= SR_BE; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= SR_PE; - } - - port->read_status_mask = 0; - if (termios->c_iflag & (BRKINT | PARMRK)) - port->read_status_mask |= SR_BE; - if (termios->c_iflag & INPCK) - port->read_status_mask |= SR_PE | SR_FE; - - writel(old_cr, port->membase + UART_CR); - - spin_unlock_irq(&port->lock); -} - -static const char *netx_type(struct uart_port *port) -{ - return port->type == PORT_NETX ? "NETX" : NULL; -} - -static void netx_release_port(struct uart_port *port) -{ - release_mem_region(port->mapbase, UART_PORT_SIZE); -} - -static int netx_request_port(struct uart_port *port) -{ - return request_mem_region(port->mapbase, UART_PORT_SIZE, - DRIVER_NAME) != NULL ? 0 : -EBUSY; -} - -static void netx_config_port(struct uart_port *port, int flags) -{ - if (flags & UART_CONFIG_TYPE && netx_request_port(port) == 0) - port->type = PORT_NETX; -} - -static int -netx_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - int ret = 0; - - if (ser->type != PORT_UNKNOWN && ser->type != PORT_NETX) - ret = -EINVAL; - - return ret; -} - -static struct uart_ops netx_pops = { - .tx_empty = netx_tx_empty, - .set_mctrl = netx_set_mctrl, - .get_mctrl = netx_get_mctrl, - .stop_tx = netx_stop_tx, - .start_tx = netx_start_tx, - .stop_rx = netx_stop_rx, - .enable_ms = netx_enable_ms, - .break_ctl = netx_break_ctl, - .startup = netx_startup, - .shutdown = netx_shutdown, - .set_termios = netx_set_termios, - .type = netx_type, - .release_port = netx_release_port, - .request_port = netx_request_port, - .config_port = netx_config_port, - .verify_port = netx_verify_port, -}; - -static struct netx_port netx_ports[] = { - { - .port = { - .type = PORT_NETX, - .iotype = UPIO_MEM, - .membase = (char __iomem *)io_p2v(NETX_PA_UART0), - .mapbase = NETX_PA_UART0, - .irq = NETX_IRQ_UART0, - .uartclk = 100000000, - .fifosize = 16, - .flags = UPF_BOOT_AUTOCONF, - .ops = &netx_pops, - .line = 0, - }, - }, { - .port = { - .type = PORT_NETX, - .iotype = UPIO_MEM, - .membase = (char __iomem *)io_p2v(NETX_PA_UART1), - .mapbase = NETX_PA_UART1, - .irq = NETX_IRQ_UART1, - .uartclk = 100000000, - .fifosize = 16, - .flags = UPF_BOOT_AUTOCONF, - .ops = &netx_pops, - .line = 1, - }, - }, { - .port = { - .type = PORT_NETX, - .iotype = UPIO_MEM, - .membase = (char __iomem *)io_p2v(NETX_PA_UART2), - .mapbase = NETX_PA_UART2, - .irq = NETX_IRQ_UART2, - .uartclk = 100000000, - .fifosize = 16, - .flags = UPF_BOOT_AUTOCONF, - .ops = &netx_pops, - .line = 2, - }, - } -}; - -#ifdef CONFIG_SERIAL_NETX_CONSOLE - -static void netx_console_putchar(struct uart_port *port, int ch) -{ - while (readl(port->membase + UART_FR) & FR_BUSY); - writel(ch, port->membase + UART_DR); -} - -static void -netx_console_write(struct console *co, const char *s, unsigned int count) -{ - struct uart_port *port = &netx_ports[co->index].port; - unsigned char cr_save; - - cr_save = readl(port->membase + UART_CR); - writel(cr_save | CR_UART_EN, port->membase + UART_CR); - - uart_console_write(port, s, count, netx_console_putchar); - - while (readl(port->membase + UART_FR) & FR_BUSY); - writel(cr_save, port->membase + UART_CR); -} - -static void __init -netx_console_get_options(struct uart_port *port, int *baud, - int *parity, int *bits, int *flow) -{ - unsigned char line_cr; - - *baud = (readl(port->membase + UART_BAUDDIV_MSB) << 8) | - readl(port->membase + UART_BAUDDIV_LSB); - *baud *= 1000; - *baud /= 4096; - *baud *= 1000; - *baud /= 256; - *baud *= 100; - - line_cr = readl(port->membase + UART_LINE_CR); - *parity = 'n'; - if (line_cr & LINE_CR_PEN) { - if (line_cr & LINE_CR_EPS) - *parity = 'e'; - else - *parity = 'o'; - } - - switch (line_cr & LINE_CR_BITS_MASK) { - case LINE_CR_8BIT: - *bits = 8; - break; - case LINE_CR_7BIT: - *bits = 7; - break; - case LINE_CR_6BIT: - *bits = 6; - break; - case LINE_CR_5BIT: - *bits = 5; - break; - } - - if (readl(port->membase + UART_RTS_CR) & RTS_CR_AUTO) - *flow = 'r'; -} - -static int __init -netx_console_setup(struct console *co, char *options) -{ - struct netx_port *sport; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - if (co->index == -1 || co->index >= ARRAY_SIZE(netx_ports)) - co->index = 0; - sport = &netx_ports[co->index]; - - if (options) { - uart_parse_options(options, &baud, &parity, &bits, &flow); - } else { - /* if the UART is enabled, assume it has been correctly setup - * by the bootloader and get the options - */ - if (readl(sport->port.membase + UART_CR) & CR_UART_EN) { - netx_console_get_options(&sport->port, &baud, - &parity, &bits, &flow); - } - - } - - return uart_set_options(&sport->port, co, baud, parity, bits, flow); -} - -static struct uart_driver netx_reg; -static struct console netx_console = { - .name = "ttyNX", - .write = netx_console_write, - .device = uart_console_device, - .setup = netx_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &netx_reg, -}; - -static int __init netx_console_init(void) -{ - register_console(&netx_console); - return 0; -} -console_initcall(netx_console_init); - -#define NETX_CONSOLE &netx_console -#else -#define NETX_CONSOLE NULL -#endif - -static struct uart_driver netx_reg = { - .owner = THIS_MODULE, - .driver_name = DRIVER_NAME, - .dev_name = "ttyNX", - .major = SERIAL_NX_MAJOR, - .minor = MINOR_START, - .nr = ARRAY_SIZE(netx_ports), - .cons = NETX_CONSOLE, -}; - -static int serial_netx_suspend(struct platform_device *pdev, pm_message_t state) -{ - struct netx_port *sport = platform_get_drvdata(pdev); - - if (sport) - uart_suspend_port(&netx_reg, &sport->port); - - return 0; -} - -static int serial_netx_resume(struct platform_device *pdev) -{ - struct netx_port *sport = platform_get_drvdata(pdev); - - if (sport) - uart_resume_port(&netx_reg, &sport->port); - - return 0; -} - -static int serial_netx_probe(struct platform_device *pdev) -{ - struct uart_port *port = &netx_ports[pdev->id].port; - - dev_info(&pdev->dev, "initialising\n"); - - port->dev = &pdev->dev; - - writel(1, port->membase + UART_RXFIFO_IRQLEVEL); - uart_add_one_port(&netx_reg, &netx_ports[pdev->id].port); - platform_set_drvdata(pdev, &netx_ports[pdev->id]); - - return 0; -} - -static int serial_netx_remove(struct platform_device *pdev) -{ - struct netx_port *sport = platform_get_drvdata(pdev); - - platform_set_drvdata(pdev, NULL); - - if (sport) - uart_remove_one_port(&netx_reg, &sport->port); - - return 0; -} - -static struct platform_driver serial_netx_driver = { - .probe = serial_netx_probe, - .remove = serial_netx_remove, - - .suspend = serial_netx_suspend, - .resume = serial_netx_resume, - - .driver = { - .name = DRIVER_NAME, - .owner = THIS_MODULE, - }, -}; - -static int __init netx_serial_init(void) -{ - int ret; - - printk(KERN_INFO "Serial: NetX driver\n"); - - ret = uart_register_driver(&netx_reg); - if (ret) - return ret; - - ret = platform_driver_register(&serial_netx_driver); - if (ret != 0) - uart_unregister_driver(&netx_reg); - - return 0; -} - -static void __exit netx_serial_exit(void) -{ - platform_driver_unregister(&serial_netx_driver); - uart_unregister_driver(&netx_reg); -} - -module_init(netx_serial_init); -module_exit(netx_serial_exit); - -MODULE_AUTHOR("Sascha Hauer"); -MODULE_DESCRIPTION("NetX serial port driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:" DRIVER_NAME); diff --git a/drivers/serial/nwpserial.c b/drivers/serial/nwpserial.c deleted file mode 100644 index de173671e3d0..000000000000 --- a/drivers/serial/nwpserial.c +++ /dev/null @@ -1,477 +0,0 @@ -/* - * Serial Port driver for a NWP uart device - * - * Copyright (C) 2008 IBM Corp., Benjamin Krill <ben@codiert.org> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - */ -#include <linux/init.h> -#include <linux/console.h> -#include <linux/serial.h> -#include <linux/serial_reg.h> -#include <linux/serial_core.h> -#include <linux/tty.h> -#include <linux/irqreturn.h> -#include <linux/mutex.h> -#include <linux/of_platform.h> -#include <linux/of_device.h> -#include <linux/nwpserial.h> -#include <asm/prom.h> -#include <asm/dcr.h> - -#define NWPSERIAL_NR 2 - -#define NWPSERIAL_STATUS_RXVALID 0x1 -#define NWPSERIAL_STATUS_TXFULL 0x2 - -struct nwpserial_port { - struct uart_port port; - dcr_host_t dcr_host; - unsigned int ier; - unsigned int mcr; -}; - -static DEFINE_MUTEX(nwpserial_mutex); -static struct nwpserial_port nwpserial_ports[NWPSERIAL_NR]; - -static void wait_for_bits(struct nwpserial_port *up, int bits) -{ - unsigned int status, tmout = 10000; - - /* Wait up to 10ms for the character(s) to be sent. */ - do { - status = dcr_read(up->dcr_host, UART_LSR); - - if (--tmout == 0) - break; - udelay(1); - } while ((status & bits) != bits); -} - -#ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL_CONSOLE -static void nwpserial_console_putchar(struct uart_port *port, int c) -{ - struct nwpserial_port *up; - up = container_of(port, struct nwpserial_port, port); - /* check if tx buffer is full */ - wait_for_bits(up, UART_LSR_THRE); - dcr_write(up->dcr_host, UART_TX, c); - up->port.icount.tx++; -} - -static void -nwpserial_console_write(struct console *co, const char *s, unsigned int count) -{ - struct nwpserial_port *up = &nwpserial_ports[co->index]; - unsigned long flags; - int locked = 1; - - if (oops_in_progress) - locked = spin_trylock_irqsave(&up->port.lock, flags); - else - spin_lock_irqsave(&up->port.lock, flags); - - /* save and disable interrupt */ - up->ier = dcr_read(up->dcr_host, UART_IER); - dcr_write(up->dcr_host, UART_IER, up->ier & ~UART_IER_RDI); - - uart_console_write(&up->port, s, count, nwpserial_console_putchar); - - /* wait for transmitter to become empty */ - while ((dcr_read(up->dcr_host, UART_LSR) & UART_LSR_THRE) == 0) - cpu_relax(); - - /* restore interrupt state */ - dcr_write(up->dcr_host, UART_IER, up->ier); - - if (locked) - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static struct uart_driver nwpserial_reg; -static struct console nwpserial_console = { - .name = "ttySQ", - .write = nwpserial_console_write, - .device = uart_console_device, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &nwpserial_reg, -}; -#define NWPSERIAL_CONSOLE (&nwpserial_console) -#else -#define NWPSERIAL_CONSOLE NULL -#endif /* CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL_CONSOLE */ - -/**************************************************************************/ - -static int nwpserial_request_port(struct uart_port *port) -{ - return 0; -} - -static void nwpserial_release_port(struct uart_port *port) -{ - /* N/A */ -} - -static void nwpserial_config_port(struct uart_port *port, int flags) -{ - port->type = PORT_NWPSERIAL; -} - -static irqreturn_t nwpserial_interrupt(int irq, void *dev_id) -{ - struct nwpserial_port *up = dev_id; - struct tty_struct *tty = up->port.state->port.tty; - irqreturn_t ret; - unsigned int iir; - unsigned char ch; - - spin_lock(&up->port.lock); - - /* check if the uart was the interrupt source. */ - iir = dcr_read(up->dcr_host, UART_IIR); - if (!iir) { - ret = IRQ_NONE; - goto out; - } - - do { - up->port.icount.rx++; - ch = dcr_read(up->dcr_host, UART_RX); - if (up->port.ignore_status_mask != NWPSERIAL_STATUS_RXVALID) - tty_insert_flip_char(tty, ch, TTY_NORMAL); - } while (dcr_read(up->dcr_host, UART_LSR) & UART_LSR_DR); - - tty_flip_buffer_push(tty); - ret = IRQ_HANDLED; - - /* clear interrupt */ - dcr_write(up->dcr_host, UART_IIR, 1); -out: - spin_unlock(&up->port.lock); - return ret; -} - -static int nwpserial_startup(struct uart_port *port) -{ - struct nwpserial_port *up; - int err; - - up = container_of(port, struct nwpserial_port, port); - - /* disable flow control by default */ - up->mcr = dcr_read(up->dcr_host, UART_MCR) & ~UART_MCR_AFE; - dcr_write(up->dcr_host, UART_MCR, up->mcr); - - /* register interrupt handler */ - err = request_irq(up->port.irq, nwpserial_interrupt, - IRQF_SHARED, "nwpserial", up); - if (err) - return err; - - /* enable interrupts */ - up->ier = UART_IER_RDI; - dcr_write(up->dcr_host, UART_IER, up->ier); - - /* enable receiving */ - up->port.ignore_status_mask &= ~NWPSERIAL_STATUS_RXVALID; - - return 0; -} - -static void nwpserial_shutdown(struct uart_port *port) -{ - struct nwpserial_port *up; - up = container_of(port, struct nwpserial_port, port); - - /* disable receiving */ - up->port.ignore_status_mask |= NWPSERIAL_STATUS_RXVALID; - - /* disable interrupts from this port */ - up->ier = 0; - dcr_write(up->dcr_host, UART_IER, up->ier); - - /* free irq */ - free_irq(up->port.irq, port); -} - -static int nwpserial_verify_port(struct uart_port *port, - struct serial_struct *ser) -{ - return -EINVAL; -} - -static const char *nwpserial_type(struct uart_port *port) -{ - return port->type == PORT_NWPSERIAL ? "nwpserial" : NULL; -} - -static void nwpserial_set_termios(struct uart_port *port, - struct ktermios *termios, struct ktermios *old) -{ - struct nwpserial_port *up; - up = container_of(port, struct nwpserial_port, port); - - up->port.read_status_mask = NWPSERIAL_STATUS_RXVALID - | NWPSERIAL_STATUS_TXFULL; - - up->port.ignore_status_mask = 0; - /* ignore all characters if CREAD is not set */ - if ((termios->c_cflag & CREAD) == 0) - up->port.ignore_status_mask |= NWPSERIAL_STATUS_RXVALID; - - /* Copy back the old hardware settings */ - if (old) - tty_termios_copy_hw(termios, old); -} - -static void nwpserial_break_ctl(struct uart_port *port, int ctl) -{ - /* N/A */ -} - -static void nwpserial_enable_ms(struct uart_port *port) -{ - /* N/A */ -} - -static void nwpserial_stop_rx(struct uart_port *port) -{ - struct nwpserial_port *up; - up = container_of(port, struct nwpserial_port, port); - /* don't forward any more data (like !CREAD) */ - up->port.ignore_status_mask = NWPSERIAL_STATUS_RXVALID; -} - -static void nwpserial_putchar(struct nwpserial_port *up, unsigned char c) -{ - /* check if tx buffer is full */ - wait_for_bits(up, UART_LSR_THRE); - dcr_write(up->dcr_host, UART_TX, c); - up->port.icount.tx++; -} - -static void nwpserial_start_tx(struct uart_port *port) -{ - struct nwpserial_port *up; - struct circ_buf *xmit; - up = container_of(port, struct nwpserial_port, port); - xmit = &up->port.state->xmit; - - if (port->x_char) { - nwpserial_putchar(up, up->port.x_char); - port->x_char = 0; - } - - while (!(uart_circ_empty(xmit) || uart_tx_stopped(&up->port))) { - nwpserial_putchar(up, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE-1); - } -} - -static unsigned int nwpserial_get_mctrl(struct uart_port *port) -{ - return 0; -} - -static void nwpserial_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - /* N/A */ -} - -static void nwpserial_stop_tx(struct uart_port *port) -{ - /* N/A */ -} - -static unsigned int nwpserial_tx_empty(struct uart_port *port) -{ - struct nwpserial_port *up; - unsigned long flags; - int ret; - up = container_of(port, struct nwpserial_port, port); - - spin_lock_irqsave(&up->port.lock, flags); - ret = dcr_read(up->dcr_host, UART_LSR); - spin_unlock_irqrestore(&up->port.lock, flags); - - return ret & UART_LSR_TEMT ? TIOCSER_TEMT : 0; -} - -static struct uart_ops nwpserial_pops = { - .tx_empty = nwpserial_tx_empty, - .set_mctrl = nwpserial_set_mctrl, - .get_mctrl = nwpserial_get_mctrl, - .stop_tx = nwpserial_stop_tx, - .start_tx = nwpserial_start_tx, - .stop_rx = nwpserial_stop_rx, - .enable_ms = nwpserial_enable_ms, - .break_ctl = nwpserial_break_ctl, - .startup = nwpserial_startup, - .shutdown = nwpserial_shutdown, - .set_termios = nwpserial_set_termios, - .type = nwpserial_type, - .release_port = nwpserial_release_port, - .request_port = nwpserial_request_port, - .config_port = nwpserial_config_port, - .verify_port = nwpserial_verify_port, -}; - -static struct uart_driver nwpserial_reg = { - .owner = THIS_MODULE, - .driver_name = "nwpserial", - .dev_name = "ttySQ", - .major = TTY_MAJOR, - .minor = 68, - .nr = NWPSERIAL_NR, - .cons = NWPSERIAL_CONSOLE, -}; - -int nwpserial_register_port(struct uart_port *port) -{ - struct nwpserial_port *up = NULL; - int ret = -1; - int i; - static int first = 1; - int dcr_len; - int dcr_base; - struct device_node *dn; - - mutex_lock(&nwpserial_mutex); - - dn = port->dev->of_node; - if (dn == NULL) - goto out; - - /* get dcr base. */ - dcr_base = dcr_resource_start(dn, 0); - - /* find matching entry */ - for (i = 0; i < NWPSERIAL_NR; i++) - if (nwpserial_ports[i].port.iobase == dcr_base) { - up = &nwpserial_ports[i]; - break; - } - - /* we didn't find a mtching entry, search for a free port */ - if (up == NULL) - for (i = 0; i < NWPSERIAL_NR; i++) - if (nwpserial_ports[i].port.type == PORT_UNKNOWN && - nwpserial_ports[i].port.iobase == 0) { - up = &nwpserial_ports[i]; - break; - } - - if (up == NULL) { - ret = -EBUSY; - goto out; - } - - if (first) - uart_register_driver(&nwpserial_reg); - first = 0; - - up->port.membase = port->membase; - up->port.irq = port->irq; - up->port.uartclk = port->uartclk; - up->port.fifosize = port->fifosize; - up->port.regshift = port->regshift; - up->port.iotype = port->iotype; - up->port.flags = port->flags; - up->port.mapbase = port->mapbase; - up->port.private_data = port->private_data; - - if (port->dev) - up->port.dev = port->dev; - - if (up->port.iobase != dcr_base) { - up->port.ops = &nwpserial_pops; - up->port.fifosize = 16; - - spin_lock_init(&up->port.lock); - - up->port.iobase = dcr_base; - dcr_len = dcr_resource_len(dn, 0); - - up->dcr_host = dcr_map(dn, dcr_base, dcr_len); - if (!DCR_MAP_OK(up->dcr_host)) { - printk(KERN_ERR "Cannot map DCR resources for NWPSERIAL"); - goto out; - } - } - - ret = uart_add_one_port(&nwpserial_reg, &up->port); - if (ret == 0) - ret = up->port.line; - -out: - mutex_unlock(&nwpserial_mutex); - - return ret; -} -EXPORT_SYMBOL(nwpserial_register_port); - -void nwpserial_unregister_port(int line) -{ - struct nwpserial_port *up = &nwpserial_ports[line]; - mutex_lock(&nwpserial_mutex); - uart_remove_one_port(&nwpserial_reg, &up->port); - - up->port.type = PORT_UNKNOWN; - - mutex_unlock(&nwpserial_mutex); -} -EXPORT_SYMBOL(nwpserial_unregister_port); - -#ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL_CONSOLE -static int __init nwpserial_console_init(void) -{ - struct nwpserial_port *up = NULL; - struct device_node *dn; - const char *name; - int dcr_base; - int dcr_len; - int i; - - /* search for a free port */ - for (i = 0; i < NWPSERIAL_NR; i++) - if (nwpserial_ports[i].port.type == PORT_UNKNOWN) { - up = &nwpserial_ports[i]; - break; - } - - if (up == NULL) - return -1; - - name = of_get_property(of_chosen, "linux,stdout-path", NULL); - if (name == NULL) - return -1; - - dn = of_find_node_by_path(name); - if (!dn) - return -1; - - spin_lock_init(&up->port.lock); - up->port.ops = &nwpserial_pops; - up->port.type = PORT_NWPSERIAL; - up->port.fifosize = 16; - - dcr_base = dcr_resource_start(dn, 0); - dcr_len = dcr_resource_len(dn, 0); - up->port.iobase = dcr_base; - - up->dcr_host = dcr_map(dn, dcr_base, dcr_len); - if (!DCR_MAP_OK(up->dcr_host)) { - printk("Cannot map DCR resources for SERIAL"); - return -1; - } - register_console(&nwpserial_console); - return 0; -} -console_initcall(nwpserial_console_init); -#endif /* CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL_CONSOLE */ diff --git a/drivers/serial/of_serial.c b/drivers/serial/of_serial.c deleted file mode 100644 index 5c7abe4c94dd..000000000000 --- a/drivers/serial/of_serial.c +++ /dev/null @@ -1,201 +0,0 @@ -/* - * Serial Port driver for Open Firmware platform devices - * - * Copyright (C) 2006 Arnd Bergmann <arnd@arndb.de>, IBM Corp. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - */ -#include <linux/init.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/serial_core.h> -#include <linux/serial_8250.h> -#include <linux/of_address.h> -#include <linux/of_irq.h> -#include <linux/of_platform.h> -#include <linux/nwpserial.h> - -struct of_serial_info { - int type; - int line; -}; - -/* - * Fill a struct uart_port for a given device node - */ -static int __devinit of_platform_serial_setup(struct platform_device *ofdev, - int type, struct uart_port *port) -{ - struct resource resource; - struct device_node *np = ofdev->dev.of_node; - const __be32 *clk, *spd; - const __be32 *prop; - int ret, prop_size; - - memset(port, 0, sizeof *port); - spd = of_get_property(np, "current-speed", NULL); - clk = of_get_property(np, "clock-frequency", NULL); - if (!clk) { - dev_warn(&ofdev->dev, "no clock-frequency property set\n"); - return -ENODEV; - } - - ret = of_address_to_resource(np, 0, &resource); - if (ret) { - dev_warn(&ofdev->dev, "invalid address\n"); - return ret; - } - - spin_lock_init(&port->lock); - port->mapbase = resource.start; - - /* Check for shifted address mapping */ - prop = of_get_property(np, "reg-offset", &prop_size); - if (prop && (prop_size == sizeof(u32))) - port->mapbase += be32_to_cpup(prop); - - /* Check for registers offset within the devices address range */ - prop = of_get_property(np, "reg-shift", &prop_size); - if (prop && (prop_size == sizeof(u32))) - port->regshift = be32_to_cpup(prop); - - port->irq = irq_of_parse_and_map(np, 0); - port->iotype = UPIO_MEM; - port->type = type; - port->uartclk = be32_to_cpup(clk); - port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP - | UPF_FIXED_PORT | UPF_FIXED_TYPE; - port->dev = &ofdev->dev; - /* If current-speed was set, then try not to change it. */ - if (spd) - port->custom_divisor = be32_to_cpup(clk) / (16 * (be32_to_cpup(spd))); - - return 0; -} - -/* - * Try to register a serial port - */ -static int __devinit of_platform_serial_probe(struct platform_device *ofdev, - const struct of_device_id *id) -{ - struct of_serial_info *info; - struct uart_port port; - int port_type; - int ret; - - if (of_find_property(ofdev->dev.of_node, "used-by-rtas", NULL)) - return -EBUSY; - - info = kmalloc(sizeof(*info), GFP_KERNEL); - if (info == NULL) - return -ENOMEM; - - port_type = (unsigned long)id->data; - ret = of_platform_serial_setup(ofdev, port_type, &port); - if (ret) - goto out; - - switch (port_type) { -#ifdef CONFIG_SERIAL_8250 - case PORT_8250 ... PORT_MAX_8250: - ret = serial8250_register_port(&port); - break; -#endif -#ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL - case PORT_NWPSERIAL: - ret = nwpserial_register_port(&port); - break; -#endif - default: - /* need to add code for these */ - case PORT_UNKNOWN: - dev_info(&ofdev->dev, "Unknown serial port found, ignored\n"); - ret = -ENODEV; - break; - } - if (ret < 0) - goto out; - - info->type = port_type; - info->line = ret; - dev_set_drvdata(&ofdev->dev, info); - return 0; -out: - kfree(info); - irq_dispose_mapping(port.irq); - return ret; -} - -/* - * Release a line - */ -static int of_platform_serial_remove(struct platform_device *ofdev) -{ - struct of_serial_info *info = dev_get_drvdata(&ofdev->dev); - switch (info->type) { -#ifdef CONFIG_SERIAL_8250 - case PORT_8250 ... PORT_MAX_8250: - serial8250_unregister_port(info->line); - break; -#endif -#ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL - case PORT_NWPSERIAL: - nwpserial_unregister_port(info->line); - break; -#endif - default: - /* need to add code for these */ - break; - } - kfree(info); - return 0; -} - -/* - * A few common types, add more as needed. - */ -static struct of_device_id __devinitdata of_platform_serial_table[] = { - { .type = "serial", .compatible = "ns8250", .data = (void *)PORT_8250, }, - { .type = "serial", .compatible = "ns16450", .data = (void *)PORT_16450, }, - { .type = "serial", .compatible = "ns16550a", .data = (void *)PORT_16550A, }, - { .type = "serial", .compatible = "ns16550", .data = (void *)PORT_16550, }, - { .type = "serial", .compatible = "ns16750", .data = (void *)PORT_16750, }, - { .type = "serial", .compatible = "ns16850", .data = (void *)PORT_16850, }, -#ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL - { .type = "serial", .compatible = "ibm,qpace-nwp-serial", - .data = (void *)PORT_NWPSERIAL, }, -#endif - { .type = "serial", .data = (void *)PORT_UNKNOWN, }, - { /* end of list */ }, -}; - -static struct of_platform_driver of_platform_serial_driver = { - .driver = { - .name = "of_serial", - .owner = THIS_MODULE, - .of_match_table = of_platform_serial_table, - }, - .probe = of_platform_serial_probe, - .remove = of_platform_serial_remove, -}; - -static int __init of_platform_serial_init(void) -{ - return of_register_platform_driver(&of_platform_serial_driver); -} -module_init(of_platform_serial_init); - -static void __exit of_platform_serial_exit(void) -{ - return of_unregister_platform_driver(&of_platform_serial_driver); -}; -module_exit(of_platform_serial_exit); - -MODULE_AUTHOR("Arnd Bergmann <arnd@arndb.de>"); -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Serial Port driver for Open Firmware platform devices"); diff --git a/drivers/serial/omap-serial.c b/drivers/serial/omap-serial.c deleted file mode 100644 index 7f2f01058789..000000000000 --- a/drivers/serial/omap-serial.c +++ /dev/null @@ -1,1359 +0,0 @@ -/* - * Driver for OMAP-UART controller. - * Based on drivers/serial/8250.c - * - * Copyright (C) 2010 Texas Instruments. - * - * Authors: - * Govindraj R <govindraj.raja@ti.com> - * Thara Gopinath <thara@ti.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * Note: This driver is made seperate from 8250 driver as we cannot - * over load 8250 driver with omap platform specific configuration for - * features like DMA, it makes easier to implement features like DMA and - * hardware flow control and software flow control configuration with - * this driver as required for the omap-platform. - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/serial_reg.h> -#include <linux/delay.h> -#include <linux/slab.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/io.h> -#include <linux/dma-mapping.h> -#include <linux/clk.h> -#include <linux/serial_core.h> -#include <linux/irq.h> - -#include <plat/dma.h> -#include <plat/dmtimer.h> -#include <plat/omap-serial.h> - -static struct uart_omap_port *ui[OMAP_MAX_HSUART_PORTS]; - -/* Forward declaration of functions */ -static void uart_tx_dma_callback(int lch, u16 ch_status, void *data); -static void serial_omap_rx_timeout(unsigned long uart_no); -static int serial_omap_start_rxdma(struct uart_omap_port *up); - -static inline unsigned int serial_in(struct uart_omap_port *up, int offset) -{ - offset <<= up->port.regshift; - return readw(up->port.membase + offset); -} - -static inline void serial_out(struct uart_omap_port *up, int offset, int value) -{ - offset <<= up->port.regshift; - writew(value, up->port.membase + offset); -} - -static inline void serial_omap_clear_fifos(struct uart_omap_port *up) -{ - serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); - serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | - UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); - serial_out(up, UART_FCR, 0); -} - -/* - * serial_omap_get_divisor - calculate divisor value - * @port: uart port info - * @baud: baudrate for which divisor needs to be calculated. - * - * We have written our own function to get the divisor so as to support - * 13x mode. 3Mbps Baudrate as an different divisor. - * Reference OMAP TRM Chapter 17: - * Table 17-1. UART Mode Baud Rates, Divisor Values, and Error Rates - * referring to oversampling - divisor value - * baudrate 460,800 to 3,686,400 all have divisor 13 - * except 3,000,000 which has divisor value 16 - */ -static unsigned int -serial_omap_get_divisor(struct uart_port *port, unsigned int baud) -{ - unsigned int divisor; - - if (baud > OMAP_MODE13X_SPEED && baud != 3000000) - divisor = 13; - else - divisor = 16; - return port->uartclk/(baud * divisor); -} - -static void serial_omap_stop_rxdma(struct uart_omap_port *up) -{ - if (up->uart_dma.rx_dma_used) { - del_timer(&up->uart_dma.rx_timer); - omap_stop_dma(up->uart_dma.rx_dma_channel); - omap_free_dma(up->uart_dma.rx_dma_channel); - up->uart_dma.rx_dma_channel = OMAP_UART_DMA_CH_FREE; - up->uart_dma.rx_dma_used = false; - } -} - -static void serial_omap_enable_ms(struct uart_port *port) -{ - struct uart_omap_port *up = (struct uart_omap_port *)port; - - dev_dbg(up->port.dev, "serial_omap_enable_ms+%d\n", up->pdev->id); - up->ier |= UART_IER_MSI; - serial_out(up, UART_IER, up->ier); -} - -static void serial_omap_stop_tx(struct uart_port *port) -{ - struct uart_omap_port *up = (struct uart_omap_port *)port; - - if (up->use_dma && - up->uart_dma.tx_dma_channel != OMAP_UART_DMA_CH_FREE) { - /* - * Check if dma is still active. If yes do nothing, - * return. Else stop dma - */ - if (omap_get_dma_active_status(up->uart_dma.tx_dma_channel)) - return; - omap_stop_dma(up->uart_dma.tx_dma_channel); - omap_free_dma(up->uart_dma.tx_dma_channel); - up->uart_dma.tx_dma_channel = OMAP_UART_DMA_CH_FREE; - } - - if (up->ier & UART_IER_THRI) { - up->ier &= ~UART_IER_THRI; - serial_out(up, UART_IER, up->ier); - } -} - -static void serial_omap_stop_rx(struct uart_port *port) -{ - struct uart_omap_port *up = (struct uart_omap_port *)port; - - if (up->use_dma) - serial_omap_stop_rxdma(up); - up->ier &= ~UART_IER_RLSI; - up->port.read_status_mask &= ~UART_LSR_DR; - serial_out(up, UART_IER, up->ier); -} - -static inline void receive_chars(struct uart_omap_port *up, int *status) -{ - struct tty_struct *tty = up->port.state->port.tty; - unsigned int flag; - unsigned char ch, lsr = *status; - int max_count = 256; - - do { - if (likely(lsr & UART_LSR_DR)) - ch = serial_in(up, UART_RX); - flag = TTY_NORMAL; - up->port.icount.rx++; - - if (unlikely(lsr & UART_LSR_BRK_ERROR_BITS)) { - /* - * For statistics only - */ - if (lsr & UART_LSR_BI) { - lsr &= ~(UART_LSR_FE | UART_LSR_PE); - up->port.icount.brk++; - /* - * We do the SysRQ and SAK checking - * here because otherwise the break - * may get masked by ignore_status_mask - * or read_status_mask. - */ - if (uart_handle_break(&up->port)) - goto ignore_char; - } else if (lsr & UART_LSR_PE) { - up->port.icount.parity++; - } else if (lsr & UART_LSR_FE) { - up->port.icount.frame++; - } - - if (lsr & UART_LSR_OE) - up->port.icount.overrun++; - - /* - * Mask off conditions which should be ignored. - */ - lsr &= up->port.read_status_mask; - -#ifdef CONFIG_SERIAL_OMAP_CONSOLE - if (up->port.line == up->port.cons->index) { - /* Recover the break flag from console xmit */ - lsr |= up->lsr_break_flag; - up->lsr_break_flag = 0; - } -#endif - if (lsr & UART_LSR_BI) - flag = TTY_BREAK; - else if (lsr & UART_LSR_PE) - flag = TTY_PARITY; - else if (lsr & UART_LSR_FE) - flag = TTY_FRAME; - } - - if (uart_handle_sysrq_char(&up->port, ch)) - goto ignore_char; - uart_insert_char(&up->port, lsr, UART_LSR_OE, ch, flag); -ignore_char: - lsr = serial_in(up, UART_LSR); - } while ((lsr & (UART_LSR_DR | UART_LSR_BI)) && (max_count-- > 0)); - spin_unlock(&up->port.lock); - tty_flip_buffer_push(tty); - spin_lock(&up->port.lock); -} - -static void transmit_chars(struct uart_omap_port *up) -{ - struct circ_buf *xmit = &up->port.state->xmit; - int count; - - if (up->port.x_char) { - serial_out(up, UART_TX, up->port.x_char); - up->port.icount.tx++; - up->port.x_char = 0; - return; - } - if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) { - serial_omap_stop_tx(&up->port); - return; - } - count = up->port.fifosize / 4; - do { - serial_out(up, UART_TX, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - up->port.icount.tx++; - if (uart_circ_empty(xmit)) - break; - } while (--count > 0); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&up->port); - - if (uart_circ_empty(xmit)) - serial_omap_stop_tx(&up->port); -} - -static inline void serial_omap_enable_ier_thri(struct uart_omap_port *up) -{ - if (!(up->ier & UART_IER_THRI)) { - up->ier |= UART_IER_THRI; - serial_out(up, UART_IER, up->ier); - } -} - -static void serial_omap_start_tx(struct uart_port *port) -{ - struct uart_omap_port *up = (struct uart_omap_port *)port; - struct circ_buf *xmit; - unsigned int start; - int ret = 0; - - if (!up->use_dma) { - serial_omap_enable_ier_thri(up); - return; - } - - if (up->uart_dma.tx_dma_used) - return; - - xmit = &up->port.state->xmit; - - if (up->uart_dma.tx_dma_channel == OMAP_UART_DMA_CH_FREE) { - ret = omap_request_dma(up->uart_dma.uart_dma_tx, - "UART Tx DMA", - (void *)uart_tx_dma_callback, up, - &(up->uart_dma.tx_dma_channel)); - - if (ret < 0) { - serial_omap_enable_ier_thri(up); - return; - } - } - spin_lock(&(up->uart_dma.tx_lock)); - up->uart_dma.tx_dma_used = true; - spin_unlock(&(up->uart_dma.tx_lock)); - - start = up->uart_dma.tx_buf_dma_phys + - (xmit->tail & (UART_XMIT_SIZE - 1)); - - up->uart_dma.tx_buf_size = uart_circ_chars_pending(xmit); - /* - * It is a circular buffer. See if the buffer has wounded back. - * If yes it will have to be transferred in two separate dma - * transfers - */ - if (start + up->uart_dma.tx_buf_size >= - up->uart_dma.tx_buf_dma_phys + UART_XMIT_SIZE) - up->uart_dma.tx_buf_size = - (up->uart_dma.tx_buf_dma_phys + - UART_XMIT_SIZE) - start; - - omap_set_dma_dest_params(up->uart_dma.tx_dma_channel, 0, - OMAP_DMA_AMODE_CONSTANT, - up->uart_dma.uart_base, 0, 0); - omap_set_dma_src_params(up->uart_dma.tx_dma_channel, 0, - OMAP_DMA_AMODE_POST_INC, start, 0, 0); - omap_set_dma_transfer_params(up->uart_dma.tx_dma_channel, - OMAP_DMA_DATA_TYPE_S8, - up->uart_dma.tx_buf_size, 1, - OMAP_DMA_SYNC_ELEMENT, - up->uart_dma.uart_dma_tx, 0); - /* FIXME: Cache maintenance needed here? */ - omap_start_dma(up->uart_dma.tx_dma_channel); -} - -static unsigned int check_modem_status(struct uart_omap_port *up) -{ - unsigned int status; - - status = serial_in(up, UART_MSR); - status |= up->msr_saved_flags; - up->msr_saved_flags = 0; - if ((status & UART_MSR_ANY_DELTA) == 0) - return status; - - if (status & UART_MSR_ANY_DELTA && up->ier & UART_IER_MSI && - up->port.state != NULL) { - if (status & UART_MSR_TERI) - up->port.icount.rng++; - if (status & UART_MSR_DDSR) - up->port.icount.dsr++; - if (status & UART_MSR_DDCD) - uart_handle_dcd_change - (&up->port, status & UART_MSR_DCD); - if (status & UART_MSR_DCTS) - uart_handle_cts_change - (&up->port, status & UART_MSR_CTS); - wake_up_interruptible(&up->port.state->port.delta_msr_wait); - } - - return status; -} - -/** - * serial_omap_irq() - This handles the interrupt from one port - * @irq: uart port irq number - * @dev_id: uart port info - */ -static inline irqreturn_t serial_omap_irq(int irq, void *dev_id) -{ - struct uart_omap_port *up = dev_id; - unsigned int iir, lsr; - unsigned long flags; - - iir = serial_in(up, UART_IIR); - if (iir & UART_IIR_NO_INT) - return IRQ_NONE; - - spin_lock_irqsave(&up->port.lock, flags); - lsr = serial_in(up, UART_LSR); - if (iir & UART_IIR_RLSI) { - if (!up->use_dma) { - if (lsr & UART_LSR_DR) - receive_chars(up, &lsr); - } else { - up->ier &= ~(UART_IER_RDI | UART_IER_RLSI); - serial_out(up, UART_IER, up->ier); - if ((serial_omap_start_rxdma(up) != 0) && - (lsr & UART_LSR_DR)) - receive_chars(up, &lsr); - } - } - - check_modem_status(up); - if ((lsr & UART_LSR_THRE) && (iir & UART_IIR_THRI)) - transmit_chars(up); - - spin_unlock_irqrestore(&up->port.lock, flags); - up->port_activity = jiffies; - return IRQ_HANDLED; -} - -static unsigned int serial_omap_tx_empty(struct uart_port *port) -{ - struct uart_omap_port *up = (struct uart_omap_port *)port; - unsigned long flags = 0; - unsigned int ret = 0; - - dev_dbg(up->port.dev, "serial_omap_tx_empty+%d\n", up->pdev->id); - spin_lock_irqsave(&up->port.lock, flags); - ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0; - spin_unlock_irqrestore(&up->port.lock, flags); - - return ret; -} - -static unsigned int serial_omap_get_mctrl(struct uart_port *port) -{ - struct uart_omap_port *up = (struct uart_omap_port *)port; - unsigned char status; - unsigned int ret = 0; - - status = check_modem_status(up); - dev_dbg(up->port.dev, "serial_omap_get_mctrl+%d\n", up->pdev->id); - - if (status & UART_MSR_DCD) - ret |= TIOCM_CAR; - if (status & UART_MSR_RI) - ret |= TIOCM_RNG; - if (status & UART_MSR_DSR) - ret |= TIOCM_DSR; - if (status & UART_MSR_CTS) - ret |= TIOCM_CTS; - return ret; -} - -static void serial_omap_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct uart_omap_port *up = (struct uart_omap_port *)port; - unsigned char mcr = 0; - - dev_dbg(up->port.dev, "serial_omap_set_mctrl+%d\n", up->pdev->id); - if (mctrl & TIOCM_RTS) - mcr |= UART_MCR_RTS; - if (mctrl & TIOCM_DTR) - mcr |= UART_MCR_DTR; - if (mctrl & TIOCM_OUT1) - mcr |= UART_MCR_OUT1; - if (mctrl & TIOCM_OUT2) - mcr |= UART_MCR_OUT2; - if (mctrl & TIOCM_LOOP) - mcr |= UART_MCR_LOOP; - - mcr |= up->mcr; - serial_out(up, UART_MCR, mcr); -} - -static void serial_omap_break_ctl(struct uart_port *port, int break_state) -{ - struct uart_omap_port *up = (struct uart_omap_port *)port; - unsigned long flags = 0; - - dev_dbg(up->port.dev, "serial_omap_break_ctl+%d\n", up->pdev->id); - spin_lock_irqsave(&up->port.lock, flags); - if (break_state == -1) - up->lcr |= UART_LCR_SBC; - else - up->lcr &= ~UART_LCR_SBC; - serial_out(up, UART_LCR, up->lcr); - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static int serial_omap_startup(struct uart_port *port) -{ - struct uart_omap_port *up = (struct uart_omap_port *)port; - unsigned long flags = 0; - int retval; - - /* - * Allocate the IRQ - */ - retval = request_irq(up->port.irq, serial_omap_irq, up->port.irqflags, - up->name, up); - if (retval) - return retval; - - dev_dbg(up->port.dev, "serial_omap_startup+%d\n", up->pdev->id); - - /* - * Clear the FIFO buffers and disable them. - * (they will be reenabled in set_termios()) - */ - serial_omap_clear_fifos(up); - /* For Hardware flow control */ - serial_out(up, UART_MCR, UART_MCR_RTS); - - /* - * Clear the interrupt registers. - */ - (void) serial_in(up, UART_LSR); - if (serial_in(up, UART_LSR) & UART_LSR_DR) - (void) serial_in(up, UART_RX); - (void) serial_in(up, UART_IIR); - (void) serial_in(up, UART_MSR); - - /* - * Now, initialize the UART - */ - serial_out(up, UART_LCR, UART_LCR_WLEN8); - spin_lock_irqsave(&up->port.lock, flags); - /* - * Most PC uarts need OUT2 raised to enable interrupts. - */ - up->port.mctrl |= TIOCM_OUT2; - serial_omap_set_mctrl(&up->port, up->port.mctrl); - spin_unlock_irqrestore(&up->port.lock, flags); - - up->msr_saved_flags = 0; - if (up->use_dma) { - free_page((unsigned long)up->port.state->xmit.buf); - up->port.state->xmit.buf = dma_alloc_coherent(NULL, - UART_XMIT_SIZE, - (dma_addr_t *)&(up->uart_dma.tx_buf_dma_phys), - 0); - init_timer(&(up->uart_dma.rx_timer)); - up->uart_dma.rx_timer.function = serial_omap_rx_timeout; - up->uart_dma.rx_timer.data = up->pdev->id; - /* Currently the buffer size is 4KB. Can increase it */ - up->uart_dma.rx_buf = dma_alloc_coherent(NULL, - up->uart_dma.rx_buf_size, - (dma_addr_t *)&(up->uart_dma.rx_buf_dma_phys), 0); - } - /* - * Finally, enable interrupts. Note: Modem status interrupts - * are set via set_termios(), which will be occurring imminently - * anyway, so we don't enable them here. - */ - up->ier = UART_IER_RLSI | UART_IER_RDI; - serial_out(up, UART_IER, up->ier); - - up->port_activity = jiffies; - return 0; -} - -static void serial_omap_shutdown(struct uart_port *port) -{ - struct uart_omap_port *up = (struct uart_omap_port *)port; - unsigned long flags = 0; - - dev_dbg(up->port.dev, "serial_omap_shutdown+%d\n", up->pdev->id); - /* - * Disable interrupts from this port - */ - up->ier = 0; - serial_out(up, UART_IER, 0); - - spin_lock_irqsave(&up->port.lock, flags); - up->port.mctrl &= ~TIOCM_OUT2; - serial_omap_set_mctrl(&up->port, up->port.mctrl); - spin_unlock_irqrestore(&up->port.lock, flags); - - /* - * Disable break condition and FIFOs - */ - serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC); - serial_omap_clear_fifos(up); - - /* - * Read data port to reset things, and then free the irq - */ - if (serial_in(up, UART_LSR) & UART_LSR_DR) - (void) serial_in(up, UART_RX); - if (up->use_dma) { - dma_free_coherent(up->port.dev, - UART_XMIT_SIZE, up->port.state->xmit.buf, - up->uart_dma.tx_buf_dma_phys); - up->port.state->xmit.buf = NULL; - serial_omap_stop_rx(port); - dma_free_coherent(up->port.dev, - up->uart_dma.rx_buf_size, up->uart_dma.rx_buf, - up->uart_dma.rx_buf_dma_phys); - up->uart_dma.rx_buf = NULL; - } - free_irq(up->port.irq, up); -} - -static inline void -serial_omap_configure_xonxoff - (struct uart_omap_port *up, struct ktermios *termios) -{ - unsigned char efr = 0; - - up->lcr = serial_in(up, UART_LCR); - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); - up->efr = serial_in(up, UART_EFR); - serial_out(up, UART_EFR, up->efr & ~UART_EFR_ECB); - - serial_out(up, UART_XON1, termios->c_cc[VSTART]); - serial_out(up, UART_XOFF1, termios->c_cc[VSTOP]); - - /* clear SW control mode bits */ - efr = up->efr; - efr &= OMAP_UART_SW_CLR; - - /* - * IXON Flag: - * Enable XON/XOFF flow control on output. - * Transmit XON1, XOFF1 - */ - if (termios->c_iflag & IXON) - efr |= OMAP_UART_SW_TX; - - /* - * IXOFF Flag: - * Enable XON/XOFF flow control on input. - * Receiver compares XON1, XOFF1. - */ - if (termios->c_iflag & IXOFF) - efr |= OMAP_UART_SW_RX; - - serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); - - up->mcr = serial_in(up, UART_MCR); - - /* - * IXANY Flag: - * Enable any character to restart output. - * Operation resumes after receiving any - * character after recognition of the XOFF character - */ - if (termios->c_iflag & IXANY) - up->mcr |= UART_MCR_XONANY; - - serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR); - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); - serial_out(up, UART_TI752_TCR, OMAP_UART_TCR_TRIG); - /* Enable special char function UARTi.EFR_REG[5] and - * load the new software flow control mode IXON or IXOFF - * and restore the UARTi.EFR_REG[4] ENHANCED_EN value. - */ - serial_out(up, UART_EFR, efr | UART_EFR_SCD); - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); - - serial_out(up, UART_MCR, up->mcr & ~UART_MCR_TCRTLR); - serial_out(up, UART_LCR, up->lcr); -} - -static void -serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct uart_omap_port *up = (struct uart_omap_port *)port; - unsigned char cval = 0; - unsigned char efr = 0; - unsigned long flags = 0; - unsigned int baud, quot; - - switch (termios->c_cflag & CSIZE) { - case CS5: - cval = UART_LCR_WLEN5; - break; - case CS6: - cval = UART_LCR_WLEN6; - break; - case CS7: - cval = UART_LCR_WLEN7; - break; - default: - case CS8: - cval = UART_LCR_WLEN8; - break; - } - - if (termios->c_cflag & CSTOPB) - cval |= UART_LCR_STOP; - if (termios->c_cflag & PARENB) - cval |= UART_LCR_PARITY; - if (!(termios->c_cflag & PARODD)) - cval |= UART_LCR_EPAR; - - /* - * Ask the core to calculate the divisor for us. - */ - - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/13); - quot = serial_omap_get_divisor(port, baud); - - up->fcr = UART_FCR_R_TRIG_01 | UART_FCR_T_TRIG_01 | - UART_FCR_ENABLE_FIFO; - if (up->use_dma) - up->fcr |= UART_FCR_DMA_SELECT; - - /* - * Ok, we're now changing the port state. Do it with - * interrupts disabled. - */ - spin_lock_irqsave(&up->port.lock, flags); - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; - if (termios->c_iflag & INPCK) - up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; - if (termios->c_iflag & (BRKINT | PARMRK)) - up->port.read_status_mask |= UART_LSR_BI; - - /* - * Characters to ignore - */ - up->port.ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; - if (termios->c_iflag & IGNBRK) { - up->port.ignore_status_mask |= UART_LSR_BI; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - up->port.ignore_status_mask |= UART_LSR_OE; - } - - /* - * ignore all characters if CREAD is not set - */ - if ((termios->c_cflag & CREAD) == 0) - up->port.ignore_status_mask |= UART_LSR_DR; - - /* - * Modem status interrupts - */ - up->ier &= ~UART_IER_MSI; - if (UART_ENABLE_MS(&up->port, termios->c_cflag)) - up->ier |= UART_IER_MSI; - serial_out(up, UART_IER, up->ier); - serial_out(up, UART_LCR, cval); /* reset DLAB */ - - /* FIFOs and DMA Settings */ - - /* FCR can be changed only when the - * baud clock is not running - * DLL_REG and DLH_REG set to 0. - */ - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); - serial_out(up, UART_DLL, 0); - serial_out(up, UART_DLM, 0); - serial_out(up, UART_LCR, 0); - - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); - - up->efr = serial_in(up, UART_EFR); - serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); - - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); - up->mcr = serial_in(up, UART_MCR); - serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR); - /* FIFO ENABLE, DMA MODE */ - serial_out(up, UART_FCR, up->fcr); - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); - - if (up->use_dma) { - serial_out(up, UART_TI752_TLR, 0); - serial_out(up, UART_OMAP_SCR, - (UART_FCR_TRIGGER_4 | UART_FCR_TRIGGER_8)); - } - - serial_out(up, UART_EFR, up->efr); - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); - serial_out(up, UART_MCR, up->mcr); - - /* Protocol, Baud Rate, and Interrupt Settings */ - - serial_out(up, UART_OMAP_MDR1, UART_OMAP_MDR1_DISABLE); - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); - - up->efr = serial_in(up, UART_EFR); - serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); - - serial_out(up, UART_LCR, 0); - serial_out(up, UART_IER, 0); - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); - - serial_out(up, UART_DLL, quot & 0xff); /* LS of divisor */ - serial_out(up, UART_DLM, quot >> 8); /* MS of divisor */ - - serial_out(up, UART_LCR, 0); - serial_out(up, UART_IER, up->ier); - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); - - serial_out(up, UART_EFR, up->efr); - serial_out(up, UART_LCR, cval); - - if (baud > 230400 && baud != 3000000) - serial_out(up, UART_OMAP_MDR1, UART_OMAP_MDR1_13X_MODE); - else - serial_out(up, UART_OMAP_MDR1, UART_OMAP_MDR1_16X_MODE); - - /* Hardware Flow Control Configuration */ - - if (termios->c_cflag & CRTSCTS) { - efr |= (UART_EFR_CTS | UART_EFR_RTS); - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); - - up->mcr = serial_in(up, UART_MCR); - serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR); - - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); - up->efr = serial_in(up, UART_EFR); - serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); - - serial_out(up, UART_TI752_TCR, OMAP_UART_TCR_TRIG); - serial_out(up, UART_EFR, efr); /* Enable AUTORTS and AUTOCTS */ - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); - serial_out(up, UART_MCR, up->mcr | UART_MCR_RTS); - serial_out(up, UART_LCR, cval); - } - - serial_omap_set_mctrl(&up->port, up->port.mctrl); - /* Software Flow Control Configuration */ - if (termios->c_iflag & (IXON | IXOFF)) - serial_omap_configure_xonxoff(up, termios); - - spin_unlock_irqrestore(&up->port.lock, flags); - dev_dbg(up->port.dev, "serial_omap_set_termios+%d\n", up->pdev->id); -} - -static void -serial_omap_pm(struct uart_port *port, unsigned int state, - unsigned int oldstate) -{ - struct uart_omap_port *up = (struct uart_omap_port *)port; - unsigned char efr; - - dev_dbg(up->port.dev, "serial_omap_pm+%d\n", up->pdev->id); - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); - efr = serial_in(up, UART_EFR); - serial_out(up, UART_EFR, efr | UART_EFR_ECB); - serial_out(up, UART_LCR, 0); - - serial_out(up, UART_IER, (state != 0) ? UART_IERX_SLEEP : 0); - serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); - serial_out(up, UART_EFR, efr); - serial_out(up, UART_LCR, 0); - /* Enable module level wake up */ - serial_out(up, UART_OMAP_WER, - (state != 0) ? OMAP_UART_WER_MOD_WKUP : 0); -} - -static void serial_omap_release_port(struct uart_port *port) -{ - dev_dbg(port->dev, "serial_omap_release_port+\n"); -} - -static int serial_omap_request_port(struct uart_port *port) -{ - dev_dbg(port->dev, "serial_omap_request_port+\n"); - return 0; -} - -static void serial_omap_config_port(struct uart_port *port, int flags) -{ - struct uart_omap_port *up = (struct uart_omap_port *)port; - - dev_dbg(up->port.dev, "serial_omap_config_port+%d\n", - up->pdev->id); - up->port.type = PORT_OMAP; -} - -static int -serial_omap_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - /* we don't want the core code to modify any port params */ - dev_dbg(port->dev, "serial_omap_verify_port+\n"); - return -EINVAL; -} - -static const char * -serial_omap_type(struct uart_port *port) -{ - struct uart_omap_port *up = (struct uart_omap_port *)port; - - dev_dbg(up->port.dev, "serial_omap_type+%d\n", up->pdev->id); - return up->name; -} - -#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - -static inline void wait_for_xmitr(struct uart_omap_port *up) -{ - unsigned int status, tmout = 10000; - - /* Wait up to 10ms for the character(s) to be sent. */ - do { - status = serial_in(up, UART_LSR); - - if (status & UART_LSR_BI) - up->lsr_break_flag = UART_LSR_BI; - - if (--tmout == 0) - break; - udelay(1); - } while ((status & BOTH_EMPTY) != BOTH_EMPTY); - - /* Wait up to 1s for flow control if necessary */ - if (up->port.flags & UPF_CONS_FLOW) { - tmout = 1000000; - for (tmout = 1000000; tmout; tmout--) { - unsigned int msr = serial_in(up, UART_MSR); - - up->msr_saved_flags |= msr & MSR_SAVE_FLAGS; - if (msr & UART_MSR_CTS) - break; - - udelay(1); - } - } -} - -#ifdef CONFIG_CONSOLE_POLL - -static void serial_omap_poll_put_char(struct uart_port *port, unsigned char ch) -{ - struct uart_omap_port *up = (struct uart_omap_port *)port; - wait_for_xmitr(up); - serial_out(up, UART_TX, ch); -} - -static int serial_omap_poll_get_char(struct uart_port *port) -{ - struct uart_omap_port *up = (struct uart_omap_port *)port; - unsigned int status = serial_in(up, UART_LSR); - - if (!(status & UART_LSR_DR)) - return NO_POLL_CHAR; - - return serial_in(up, UART_RX); -} - -#endif /* CONFIG_CONSOLE_POLL */ - -#ifdef CONFIG_SERIAL_OMAP_CONSOLE - -static struct uart_omap_port *serial_omap_console_ports[4]; - -static struct uart_driver serial_omap_reg; - -static void serial_omap_console_putchar(struct uart_port *port, int ch) -{ - struct uart_omap_port *up = (struct uart_omap_port *)port; - - wait_for_xmitr(up); - serial_out(up, UART_TX, ch); -} - -static void -serial_omap_console_write(struct console *co, const char *s, - unsigned int count) -{ - struct uart_omap_port *up = serial_omap_console_ports[co->index]; - unsigned long flags; - unsigned int ier; - int locked = 1; - - local_irq_save(flags); - if (up->port.sysrq) - locked = 0; - else if (oops_in_progress) - locked = spin_trylock(&up->port.lock); - else - spin_lock(&up->port.lock); - - /* - * First save the IER then disable the interrupts - */ - ier = serial_in(up, UART_IER); - serial_out(up, UART_IER, 0); - - uart_console_write(&up->port, s, count, serial_omap_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore the IER - */ - wait_for_xmitr(up); - serial_out(up, UART_IER, ier); - /* - * The receive handling will happen properly because the - * receive ready bit will still be set; it is not cleared - * on read. However, modem control will not, we must - * call it if we have saved something in the saved flags - * while processing with interrupts off. - */ - if (up->msr_saved_flags) - check_modem_status(up); - - if (locked) - spin_unlock(&up->port.lock); - local_irq_restore(flags); -} - -static int __init -serial_omap_console_setup(struct console *co, char *options) -{ - struct uart_omap_port *up; - int baud = 115200; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - if (serial_omap_console_ports[co->index] == NULL) - return -ENODEV; - up = serial_omap_console_ports[co->index]; - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(&up->port, co, baud, parity, bits, flow); -} - -static struct console serial_omap_console = { - .name = OMAP_SERIAL_NAME, - .write = serial_omap_console_write, - .device = uart_console_device, - .setup = serial_omap_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &serial_omap_reg, -}; - -static void serial_omap_add_console_port(struct uart_omap_port *up) -{ - serial_omap_console_ports[up->pdev->id] = up; -} - -#define OMAP_CONSOLE (&serial_omap_console) - -#else - -#define OMAP_CONSOLE NULL - -static inline void serial_omap_add_console_port(struct uart_omap_port *up) -{} - -#endif - -static struct uart_ops serial_omap_pops = { - .tx_empty = serial_omap_tx_empty, - .set_mctrl = serial_omap_set_mctrl, - .get_mctrl = serial_omap_get_mctrl, - .stop_tx = serial_omap_stop_tx, - .start_tx = serial_omap_start_tx, - .stop_rx = serial_omap_stop_rx, - .enable_ms = serial_omap_enable_ms, - .break_ctl = serial_omap_break_ctl, - .startup = serial_omap_startup, - .shutdown = serial_omap_shutdown, - .set_termios = serial_omap_set_termios, - .pm = serial_omap_pm, - .type = serial_omap_type, - .release_port = serial_omap_release_port, - .request_port = serial_omap_request_port, - .config_port = serial_omap_config_port, - .verify_port = serial_omap_verify_port, -#ifdef CONFIG_CONSOLE_POLL - .poll_put_char = serial_omap_poll_put_char, - .poll_get_char = serial_omap_poll_get_char, -#endif -}; - -static struct uart_driver serial_omap_reg = { - .owner = THIS_MODULE, - .driver_name = "OMAP-SERIAL", - .dev_name = OMAP_SERIAL_NAME, - .nr = OMAP_MAX_HSUART_PORTS, - .cons = OMAP_CONSOLE, -}; - -static int -serial_omap_suspend(struct platform_device *pdev, pm_message_t state) -{ - struct uart_omap_port *up = platform_get_drvdata(pdev); - - if (up) - uart_suspend_port(&serial_omap_reg, &up->port); - return 0; -} - -static int serial_omap_resume(struct platform_device *dev) -{ - struct uart_omap_port *up = platform_get_drvdata(dev); - - if (up) - uart_resume_port(&serial_omap_reg, &up->port); - return 0; -} - -static void serial_omap_rx_timeout(unsigned long uart_no) -{ - struct uart_omap_port *up = ui[uart_no]; - unsigned int curr_dma_pos, curr_transmitted_size; - int ret = 0; - - curr_dma_pos = omap_get_dma_dst_pos(up->uart_dma.rx_dma_channel); - if ((curr_dma_pos == up->uart_dma.prev_rx_dma_pos) || - (curr_dma_pos == 0)) { - if (jiffies_to_msecs(jiffies - up->port_activity) < - RX_TIMEOUT) { - mod_timer(&up->uart_dma.rx_timer, jiffies + - usecs_to_jiffies(up->uart_dma.rx_timeout)); - } else { - serial_omap_stop_rxdma(up); - up->ier |= (UART_IER_RDI | UART_IER_RLSI); - serial_out(up, UART_IER, up->ier); - } - return; - } - - curr_transmitted_size = curr_dma_pos - - up->uart_dma.prev_rx_dma_pos; - up->port.icount.rx += curr_transmitted_size; - tty_insert_flip_string(up->port.state->port.tty, - up->uart_dma.rx_buf + - (up->uart_dma.prev_rx_dma_pos - - up->uart_dma.rx_buf_dma_phys), - curr_transmitted_size); - tty_flip_buffer_push(up->port.state->port.tty); - up->uart_dma.prev_rx_dma_pos = curr_dma_pos; - if (up->uart_dma.rx_buf_size + - up->uart_dma.rx_buf_dma_phys == curr_dma_pos) { - ret = serial_omap_start_rxdma(up); - if (ret < 0) { - serial_omap_stop_rxdma(up); - up->ier |= (UART_IER_RDI | UART_IER_RLSI); - serial_out(up, UART_IER, up->ier); - } - } else { - mod_timer(&up->uart_dma.rx_timer, jiffies + - usecs_to_jiffies(up->uart_dma.rx_timeout)); - } - up->port_activity = jiffies; -} - -static void uart_rx_dma_callback(int lch, u16 ch_status, void *data) -{ - return; -} - -static int serial_omap_start_rxdma(struct uart_omap_port *up) -{ - int ret = 0; - - if (up->uart_dma.rx_dma_channel == -1) { - ret = omap_request_dma(up->uart_dma.uart_dma_rx, - "UART Rx DMA", - (void *)uart_rx_dma_callback, up, - &(up->uart_dma.rx_dma_channel)); - if (ret < 0) - return ret; - - omap_set_dma_src_params(up->uart_dma.rx_dma_channel, 0, - OMAP_DMA_AMODE_CONSTANT, - up->uart_dma.uart_base, 0, 0); - omap_set_dma_dest_params(up->uart_dma.rx_dma_channel, 0, - OMAP_DMA_AMODE_POST_INC, - up->uart_dma.rx_buf_dma_phys, 0, 0); - omap_set_dma_transfer_params(up->uart_dma.rx_dma_channel, - OMAP_DMA_DATA_TYPE_S8, - up->uart_dma.rx_buf_size, 1, - OMAP_DMA_SYNC_ELEMENT, - up->uart_dma.uart_dma_rx, 0); - } - up->uart_dma.prev_rx_dma_pos = up->uart_dma.rx_buf_dma_phys; - /* FIXME: Cache maintenance needed here? */ - omap_start_dma(up->uart_dma.rx_dma_channel); - mod_timer(&up->uart_dma.rx_timer, jiffies + - usecs_to_jiffies(up->uart_dma.rx_timeout)); - up->uart_dma.rx_dma_used = true; - return ret; -} - -static void serial_omap_continue_tx(struct uart_omap_port *up) -{ - struct circ_buf *xmit = &up->port.state->xmit; - unsigned int start = up->uart_dma.tx_buf_dma_phys - + (xmit->tail & (UART_XMIT_SIZE - 1)); - - if (uart_circ_empty(xmit)) - return; - - up->uart_dma.tx_buf_size = uart_circ_chars_pending(xmit); - /* - * It is a circular buffer. See if the buffer has wounded back. - * If yes it will have to be transferred in two separate dma - * transfers - */ - if (start + up->uart_dma.tx_buf_size >= - up->uart_dma.tx_buf_dma_phys + UART_XMIT_SIZE) - up->uart_dma.tx_buf_size = - (up->uart_dma.tx_buf_dma_phys + UART_XMIT_SIZE) - start; - omap_set_dma_dest_params(up->uart_dma.tx_dma_channel, 0, - OMAP_DMA_AMODE_CONSTANT, - up->uart_dma.uart_base, 0, 0); - omap_set_dma_src_params(up->uart_dma.tx_dma_channel, 0, - OMAP_DMA_AMODE_POST_INC, start, 0, 0); - omap_set_dma_transfer_params(up->uart_dma.tx_dma_channel, - OMAP_DMA_DATA_TYPE_S8, - up->uart_dma.tx_buf_size, 1, - OMAP_DMA_SYNC_ELEMENT, - up->uart_dma.uart_dma_tx, 0); - /* FIXME: Cache maintenance needed here? */ - omap_start_dma(up->uart_dma.tx_dma_channel); -} - -static void uart_tx_dma_callback(int lch, u16 ch_status, void *data) -{ - struct uart_omap_port *up = (struct uart_omap_port *)data; - struct circ_buf *xmit = &up->port.state->xmit; - - xmit->tail = (xmit->tail + up->uart_dma.tx_buf_size) & \ - (UART_XMIT_SIZE - 1); - up->port.icount.tx += up->uart_dma.tx_buf_size; - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&up->port); - - if (uart_circ_empty(xmit)) { - spin_lock(&(up->uart_dma.tx_lock)); - serial_omap_stop_tx(&up->port); - up->uart_dma.tx_dma_used = false; - spin_unlock(&(up->uart_dma.tx_lock)); - } else { - omap_stop_dma(up->uart_dma.tx_dma_channel); - serial_omap_continue_tx(up); - } - up->port_activity = jiffies; - return; -} - -static int serial_omap_probe(struct platform_device *pdev) -{ - struct uart_omap_port *up; - struct resource *mem, *irq, *dma_tx, *dma_rx; - struct omap_uart_port_info *omap_up_info = pdev->dev.platform_data; - int ret = -ENOSPC; - - mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!mem) { - dev_err(&pdev->dev, "no mem resource?\n"); - return -ENODEV; - } - - irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!irq) { - dev_err(&pdev->dev, "no irq resource?\n"); - return -ENODEV; - } - - if (!request_mem_region(mem->start, (mem->end - mem->start) + 1, - pdev->dev.driver->name)) { - dev_err(&pdev->dev, "memory region already claimed\n"); - return -EBUSY; - } - - dma_rx = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx"); - if (!dma_rx) { - ret = -EINVAL; - goto err; - } - - dma_tx = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx"); - if (!dma_tx) { - ret = -EINVAL; - goto err; - } - - up = kzalloc(sizeof(*up), GFP_KERNEL); - if (up == NULL) { - ret = -ENOMEM; - goto do_release_region; - } - sprintf(up->name, "OMAP UART%d", pdev->id); - up->pdev = pdev; - up->port.dev = &pdev->dev; - up->port.type = PORT_OMAP; - up->port.iotype = UPIO_MEM; - up->port.irq = irq->start; - - up->port.regshift = 2; - up->port.fifosize = 64; - up->port.ops = &serial_omap_pops; - up->port.line = pdev->id; - - up->port.membase = omap_up_info->membase; - up->port.mapbase = omap_up_info->mapbase; - up->port.flags = omap_up_info->flags; - up->port.irqflags = omap_up_info->irqflags; - up->port.uartclk = omap_up_info->uartclk; - up->uart_dma.uart_base = mem->start; - - if (omap_up_info->dma_enabled) { - up->uart_dma.uart_dma_tx = dma_tx->start; - up->uart_dma.uart_dma_rx = dma_rx->start; - up->use_dma = 1; - up->uart_dma.rx_buf_size = 4096; - up->uart_dma.rx_timeout = 2; - spin_lock_init(&(up->uart_dma.tx_lock)); - spin_lock_init(&(up->uart_dma.rx_lock)); - up->uart_dma.tx_dma_channel = OMAP_UART_DMA_CH_FREE; - up->uart_dma.rx_dma_channel = OMAP_UART_DMA_CH_FREE; - } - - ui[pdev->id] = up; - serial_omap_add_console_port(up); - - ret = uart_add_one_port(&serial_omap_reg, &up->port); - if (ret != 0) - goto do_release_region; - - platform_set_drvdata(pdev, up); - return 0; -err: - dev_err(&pdev->dev, "[UART%d]: failure [%s]: %d\n", - pdev->id, __func__, ret); -do_release_region: - release_mem_region(mem->start, (mem->end - mem->start) + 1); - return ret; -} - -static int serial_omap_remove(struct platform_device *dev) -{ - struct uart_omap_port *up = platform_get_drvdata(dev); - - platform_set_drvdata(dev, NULL); - if (up) { - uart_remove_one_port(&serial_omap_reg, &up->port); - kfree(up); - } - return 0; -} - -static struct platform_driver serial_omap_driver = { - .probe = serial_omap_probe, - .remove = serial_omap_remove, - - .suspend = serial_omap_suspend, - .resume = serial_omap_resume, - .driver = { - .name = DRIVER_NAME, - }, -}; - -static int __init serial_omap_init(void) -{ - int ret; - - ret = uart_register_driver(&serial_omap_reg); - if (ret != 0) - return ret; - ret = platform_driver_register(&serial_omap_driver); - if (ret != 0) - uart_unregister_driver(&serial_omap_reg); - return ret; -} - -static void __exit serial_omap_exit(void) -{ - platform_driver_unregister(&serial_omap_driver); - uart_unregister_driver(&serial_omap_reg); -} - -module_init(serial_omap_init); -module_exit(serial_omap_exit); - -MODULE_DESCRIPTION("OMAP High Speed UART driver"); -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Texas Instruments Inc"); diff --git a/drivers/serial/pch_uart.c b/drivers/serial/pch_uart.c deleted file mode 100644 index 70a61458ec42..000000000000 --- a/drivers/serial/pch_uart.c +++ /dev/null @@ -1,1451 +0,0 @@ -/* - *Copyright (C) 2010 OKI SEMICONDUCTOR CO., LTD. - * - *This program is free software; you can redistribute it and/or modify - *it under the terms of the GNU General Public License as published by - *the Free Software Foundation; version 2 of the License. - * - *This program is distributed in the hope that it will be useful, - *but WITHOUT ANY WARRANTY; without even the implied warranty of - *MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - *GNU General Public License for more details. - * - *You should have received a copy of the GNU General Public License - *along with this program; if not, write to the Free Software - *Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. - */ -#include <linux/serial_reg.h> -#include <linux/pci.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/serial_core.h> -#include <linux/interrupt.h> -#include <linux/io.h> - -#include <linux/dmaengine.h> -#include <linux/pch_dma.h> - -enum { - PCH_UART_HANDLED_RX_INT_SHIFT, - PCH_UART_HANDLED_TX_INT_SHIFT, - PCH_UART_HANDLED_RX_ERR_INT_SHIFT, - PCH_UART_HANDLED_RX_TRG_INT_SHIFT, - PCH_UART_HANDLED_MS_INT_SHIFT, -}; - -enum { - PCH_UART_8LINE, - PCH_UART_2LINE, -}; - -#define PCH_UART_DRIVER_DEVICE "ttyPCH" - -#define PCH_UART_NR_GE_256FIFO 1 -#define PCH_UART_NR_GE_64FIFO 3 -#define PCH_UART_NR_GE (PCH_UART_NR_GE_256FIFO+PCH_UART_NR_GE_64FIFO) -#define PCH_UART_NR PCH_UART_NR_GE - -#define PCH_UART_HANDLED_RX_INT (1<<((PCH_UART_HANDLED_RX_INT_SHIFT)<<1)) -#define PCH_UART_HANDLED_TX_INT (1<<((PCH_UART_HANDLED_TX_INT_SHIFT)<<1)) -#define PCH_UART_HANDLED_RX_ERR_INT (1<<((\ - PCH_UART_HANDLED_RX_ERR_INT_SHIFT)<<1)) -#define PCH_UART_HANDLED_RX_TRG_INT (1<<((\ - PCH_UART_HANDLED_RX_TRG_INT_SHIFT)<<1)) -#define PCH_UART_HANDLED_MS_INT (1<<((PCH_UART_HANDLED_MS_INT_SHIFT)<<1)) - -#define PCH_UART_RBR 0x00 -#define PCH_UART_THR 0x00 - -#define PCH_UART_IER_MASK (PCH_UART_IER_ERBFI|PCH_UART_IER_ETBEI|\ - PCH_UART_IER_ELSI|PCH_UART_IER_EDSSI) -#define PCH_UART_IER_ERBFI 0x00000001 -#define PCH_UART_IER_ETBEI 0x00000002 -#define PCH_UART_IER_ELSI 0x00000004 -#define PCH_UART_IER_EDSSI 0x00000008 - -#define PCH_UART_IIR_IP 0x00000001 -#define PCH_UART_IIR_IID 0x00000006 -#define PCH_UART_IIR_MSI 0x00000000 -#define PCH_UART_IIR_TRI 0x00000002 -#define PCH_UART_IIR_RRI 0x00000004 -#define PCH_UART_IIR_REI 0x00000006 -#define PCH_UART_IIR_TOI 0x00000008 -#define PCH_UART_IIR_FIFO256 0x00000020 -#define PCH_UART_IIR_FIFO64 PCH_UART_IIR_FIFO256 -#define PCH_UART_IIR_FE 0x000000C0 - -#define PCH_UART_FCR_FIFOE 0x00000001 -#define PCH_UART_FCR_RFR 0x00000002 -#define PCH_UART_FCR_TFR 0x00000004 -#define PCH_UART_FCR_DMS 0x00000008 -#define PCH_UART_FCR_FIFO256 0x00000020 -#define PCH_UART_FCR_RFTL 0x000000C0 - -#define PCH_UART_FCR_RFTL1 0x00000000 -#define PCH_UART_FCR_RFTL64 0x00000040 -#define PCH_UART_FCR_RFTL128 0x00000080 -#define PCH_UART_FCR_RFTL224 0x000000C0 -#define PCH_UART_FCR_RFTL16 PCH_UART_FCR_RFTL64 -#define PCH_UART_FCR_RFTL32 PCH_UART_FCR_RFTL128 -#define PCH_UART_FCR_RFTL56 PCH_UART_FCR_RFTL224 -#define PCH_UART_FCR_RFTL4 PCH_UART_FCR_RFTL64 -#define PCH_UART_FCR_RFTL8 PCH_UART_FCR_RFTL128 -#define PCH_UART_FCR_RFTL14 PCH_UART_FCR_RFTL224 -#define PCH_UART_FCR_RFTL_SHIFT 6 - -#define PCH_UART_LCR_WLS 0x00000003 -#define PCH_UART_LCR_STB 0x00000004 -#define PCH_UART_LCR_PEN 0x00000008 -#define PCH_UART_LCR_EPS 0x00000010 -#define PCH_UART_LCR_SP 0x00000020 -#define PCH_UART_LCR_SB 0x00000040 -#define PCH_UART_LCR_DLAB 0x00000080 -#define PCH_UART_LCR_NP 0x00000000 -#define PCH_UART_LCR_OP PCH_UART_LCR_PEN -#define PCH_UART_LCR_EP (PCH_UART_LCR_PEN | PCH_UART_LCR_EPS) -#define PCH_UART_LCR_1P (PCH_UART_LCR_PEN | PCH_UART_LCR_SP) -#define PCH_UART_LCR_0P (PCH_UART_LCR_PEN | PCH_UART_LCR_EPS |\ - PCH_UART_LCR_SP) - -#define PCH_UART_LCR_5BIT 0x00000000 -#define PCH_UART_LCR_6BIT 0x00000001 -#define PCH_UART_LCR_7BIT 0x00000002 -#define PCH_UART_LCR_8BIT 0x00000003 - -#define PCH_UART_MCR_DTR 0x00000001 -#define PCH_UART_MCR_RTS 0x00000002 -#define PCH_UART_MCR_OUT 0x0000000C -#define PCH_UART_MCR_LOOP 0x00000010 -#define PCH_UART_MCR_AFE 0x00000020 - -#define PCH_UART_LSR_DR 0x00000001 -#define PCH_UART_LSR_ERR (1<<7) - -#define PCH_UART_MSR_DCTS 0x00000001 -#define PCH_UART_MSR_DDSR 0x00000002 -#define PCH_UART_MSR_TERI 0x00000004 -#define PCH_UART_MSR_DDCD 0x00000008 -#define PCH_UART_MSR_CTS 0x00000010 -#define PCH_UART_MSR_DSR 0x00000020 -#define PCH_UART_MSR_RI 0x00000040 -#define PCH_UART_MSR_DCD 0x00000080 -#define PCH_UART_MSR_DELTA (PCH_UART_MSR_DCTS | PCH_UART_MSR_DDSR |\ - PCH_UART_MSR_TERI | PCH_UART_MSR_DDCD) - -#define PCH_UART_DLL 0x00 -#define PCH_UART_DLM 0x01 - -#define DIV_ROUND(a, b) (((a) + ((b)/2)) / (b)) - -#define PCH_UART_IID_RLS (PCH_UART_IIR_REI) -#define PCH_UART_IID_RDR (PCH_UART_IIR_RRI) -#define PCH_UART_IID_RDR_TO (PCH_UART_IIR_RRI | PCH_UART_IIR_TOI) -#define PCH_UART_IID_THRE (PCH_UART_IIR_TRI) -#define PCH_UART_IID_MS (PCH_UART_IIR_MSI) - -#define PCH_UART_HAL_PARITY_NONE (PCH_UART_LCR_NP) -#define PCH_UART_HAL_PARITY_ODD (PCH_UART_LCR_OP) -#define PCH_UART_HAL_PARITY_EVEN (PCH_UART_LCR_EP) -#define PCH_UART_HAL_PARITY_FIX1 (PCH_UART_LCR_1P) -#define PCH_UART_HAL_PARITY_FIX0 (PCH_UART_LCR_0P) -#define PCH_UART_HAL_5BIT (PCH_UART_LCR_5BIT) -#define PCH_UART_HAL_6BIT (PCH_UART_LCR_6BIT) -#define PCH_UART_HAL_7BIT (PCH_UART_LCR_7BIT) -#define PCH_UART_HAL_8BIT (PCH_UART_LCR_8BIT) -#define PCH_UART_HAL_STB1 0 -#define PCH_UART_HAL_STB2 (PCH_UART_LCR_STB) - -#define PCH_UART_HAL_CLR_TX_FIFO (PCH_UART_FCR_TFR) -#define PCH_UART_HAL_CLR_RX_FIFO (PCH_UART_FCR_RFR) -#define PCH_UART_HAL_CLR_ALL_FIFO (PCH_UART_HAL_CLR_TX_FIFO | \ - PCH_UART_HAL_CLR_RX_FIFO) - -#define PCH_UART_HAL_DMA_MODE0 0 -#define PCH_UART_HAL_FIFO_DIS 0 -#define PCH_UART_HAL_FIFO16 (PCH_UART_FCR_FIFOE) -#define PCH_UART_HAL_FIFO256 (PCH_UART_FCR_FIFOE | \ - PCH_UART_FCR_FIFO256) -#define PCH_UART_HAL_FIFO64 (PCH_UART_HAL_FIFO256) -#define PCH_UART_HAL_TRIGGER1 (PCH_UART_FCR_RFTL1) -#define PCH_UART_HAL_TRIGGER64 (PCH_UART_FCR_RFTL64) -#define PCH_UART_HAL_TRIGGER128 (PCH_UART_FCR_RFTL128) -#define PCH_UART_HAL_TRIGGER224 (PCH_UART_FCR_RFTL224) -#define PCH_UART_HAL_TRIGGER16 (PCH_UART_FCR_RFTL16) -#define PCH_UART_HAL_TRIGGER32 (PCH_UART_FCR_RFTL32) -#define PCH_UART_HAL_TRIGGER56 (PCH_UART_FCR_RFTL56) -#define PCH_UART_HAL_TRIGGER4 (PCH_UART_FCR_RFTL4) -#define PCH_UART_HAL_TRIGGER8 (PCH_UART_FCR_RFTL8) -#define PCH_UART_HAL_TRIGGER14 (PCH_UART_FCR_RFTL14) -#define PCH_UART_HAL_TRIGGER_L (PCH_UART_FCR_RFTL64) -#define PCH_UART_HAL_TRIGGER_M (PCH_UART_FCR_RFTL128) -#define PCH_UART_HAL_TRIGGER_H (PCH_UART_FCR_RFTL224) - -#define PCH_UART_HAL_RX_INT (PCH_UART_IER_ERBFI) -#define PCH_UART_HAL_TX_INT (PCH_UART_IER_ETBEI) -#define PCH_UART_HAL_RX_ERR_INT (PCH_UART_IER_ELSI) -#define PCH_UART_HAL_MS_INT (PCH_UART_IER_EDSSI) -#define PCH_UART_HAL_ALL_INT (PCH_UART_IER_MASK) - -#define PCH_UART_HAL_DTR (PCH_UART_MCR_DTR) -#define PCH_UART_HAL_RTS (PCH_UART_MCR_RTS) -#define PCH_UART_HAL_OUT (PCH_UART_MCR_OUT) -#define PCH_UART_HAL_LOOP (PCH_UART_MCR_LOOP) -#define PCH_UART_HAL_AFE (PCH_UART_MCR_AFE) - -struct pch_uart_buffer { - unsigned char *buf; - int size; -}; - -struct eg20t_port { - struct uart_port port; - int port_type; - void __iomem *membase; - resource_size_t mapbase; - unsigned int iobase; - struct pci_dev *pdev; - int fifo_size; - int base_baud; - int start_tx; - int start_rx; - int tx_empty; - int int_dis_flag; - int trigger; - int trigger_level; - struct pch_uart_buffer rxbuf; - unsigned int dmsr; - unsigned int fcr; - unsigned int use_dma; - unsigned int use_dma_flag; - struct dma_async_tx_descriptor *desc_tx; - struct dma_async_tx_descriptor *desc_rx; - struct pch_dma_slave param_tx; - struct pch_dma_slave param_rx; - struct dma_chan *chan_tx; - struct dma_chan *chan_rx; - struct scatterlist sg_tx; - struct scatterlist sg_rx; - int tx_dma_use; - void *rx_buf_virt; - dma_addr_t rx_buf_dma; -}; - -static unsigned int default_baud = 9600; -static const int trigger_level_256[4] = { 1, 64, 128, 224 }; -static const int trigger_level_64[4] = { 1, 16, 32, 56 }; -static const int trigger_level_16[4] = { 1, 4, 8, 14 }; -static const int trigger_level_1[4] = { 1, 1, 1, 1 }; - -static void pch_uart_hal_request(struct pci_dev *pdev, int fifosize, - int base_baud) -{ - struct eg20t_port *priv = pci_get_drvdata(pdev); - - priv->trigger_level = 1; - priv->fcr = 0; -} - -static unsigned int get_msr(struct eg20t_port *priv, void __iomem *base) -{ - unsigned int msr = ioread8(base + UART_MSR); - priv->dmsr |= msr & PCH_UART_MSR_DELTA; - - return msr; -} - -static void pch_uart_hal_enable_interrupt(struct eg20t_port *priv, - unsigned int flag) -{ - u8 ier = ioread8(priv->membase + UART_IER); - ier |= flag & PCH_UART_IER_MASK; - iowrite8(ier, priv->membase + UART_IER); -} - -static void pch_uart_hal_disable_interrupt(struct eg20t_port *priv, - unsigned int flag) -{ - u8 ier = ioread8(priv->membase + UART_IER); - ier &= ~(flag & PCH_UART_IER_MASK); - iowrite8(ier, priv->membase + UART_IER); -} - -static int pch_uart_hal_set_line(struct eg20t_port *priv, int baud, - unsigned int parity, unsigned int bits, - unsigned int stb) -{ - unsigned int dll, dlm, lcr; - int div; - - div = DIV_ROUND(priv->base_baud / 16, baud); - if (div < 0 || USHRT_MAX <= div) { - pr_err("Invalid Baud(div=0x%x)\n", div); - return -EINVAL; - } - - dll = (unsigned int)div & 0x00FFU; - dlm = ((unsigned int)div >> 8) & 0x00FFU; - - if (parity & ~(PCH_UART_LCR_PEN | PCH_UART_LCR_EPS | PCH_UART_LCR_SP)) { - pr_err("Invalid parity(0x%x)\n", parity); - return -EINVAL; - } - - if (bits & ~PCH_UART_LCR_WLS) { - pr_err("Invalid bits(0x%x)\n", bits); - return -EINVAL; - } - - if (stb & ~PCH_UART_LCR_STB) { - pr_err("Invalid STB(0x%x)\n", stb); - return -EINVAL; - } - - lcr = parity; - lcr |= bits; - lcr |= stb; - - pr_debug("%s:baud = %d, div = %04x, lcr = %02x (%lu)\n", - __func__, baud, div, lcr, jiffies); - iowrite8(PCH_UART_LCR_DLAB, priv->membase + UART_LCR); - iowrite8(dll, priv->membase + PCH_UART_DLL); - iowrite8(dlm, priv->membase + PCH_UART_DLM); - iowrite8(lcr, priv->membase + UART_LCR); - - return 0; -} - -static int pch_uart_hal_fifo_reset(struct eg20t_port *priv, - unsigned int flag) -{ - if (flag & ~(PCH_UART_FCR_TFR | PCH_UART_FCR_RFR)) { - pr_err("%s:Invalid flag(0x%x)\n", __func__, flag); - return -EINVAL; - } - - iowrite8(PCH_UART_FCR_FIFOE | priv->fcr, priv->membase + UART_FCR); - iowrite8(PCH_UART_FCR_FIFOE | priv->fcr | flag, - priv->membase + UART_FCR); - iowrite8(priv->fcr, priv->membase + UART_FCR); - - return 0; -} - -static int pch_uart_hal_set_fifo(struct eg20t_port *priv, - unsigned int dmamode, - unsigned int fifo_size, unsigned int trigger) -{ - u8 fcr; - - if (dmamode & ~PCH_UART_FCR_DMS) { - pr_err("%s:Invalid DMA Mode(0x%x)\n", __func__, dmamode); - return -EINVAL; - } - - if (fifo_size & ~(PCH_UART_FCR_FIFOE | PCH_UART_FCR_FIFO256)) { - pr_err("%s:Invalid FIFO SIZE(0x%x)\n", __func__, fifo_size); - return -EINVAL; - } - - if (trigger & ~PCH_UART_FCR_RFTL) { - pr_err("%s:Invalid TRIGGER(0x%x)\n", __func__, trigger); - return -EINVAL; - } - - switch (priv->fifo_size) { - case 256: - priv->trigger_level = - trigger_level_256[trigger >> PCH_UART_FCR_RFTL_SHIFT]; - break; - case 64: - priv->trigger_level = - trigger_level_64[trigger >> PCH_UART_FCR_RFTL_SHIFT]; - break; - case 16: - priv->trigger_level = - trigger_level_16[trigger >> PCH_UART_FCR_RFTL_SHIFT]; - break; - default: - priv->trigger_level = - trigger_level_1[trigger >> PCH_UART_FCR_RFTL_SHIFT]; - break; - } - fcr = - dmamode | fifo_size | trigger | PCH_UART_FCR_RFR | PCH_UART_FCR_TFR; - iowrite8(PCH_UART_FCR_FIFOE, priv->membase + UART_FCR); - iowrite8(PCH_UART_FCR_FIFOE | PCH_UART_FCR_RFR | PCH_UART_FCR_TFR, - priv->membase + UART_FCR); - iowrite8(fcr, priv->membase + UART_FCR); - priv->fcr = fcr; - - return 0; -} - -static u8 pch_uart_hal_get_modem(struct eg20t_port *priv) -{ - priv->dmsr = 0; - return get_msr(priv, priv->membase); -} - -static int pch_uart_hal_write(struct eg20t_port *priv, - const unsigned char *buf, int tx_size) -{ - int i; - unsigned int thr; - - for (i = 0; i < tx_size;) { - thr = buf[i++]; - iowrite8(thr, priv->membase + PCH_UART_THR); - } - return i; -} - -static int pch_uart_hal_read(struct eg20t_port *priv, unsigned char *buf, - int rx_size) -{ - int i; - u8 rbr, lsr; - - lsr = ioread8(priv->membase + UART_LSR); - for (i = 0, lsr = ioread8(priv->membase + UART_LSR); - i < rx_size && lsr & UART_LSR_DR; - lsr = ioread8(priv->membase + UART_LSR)) { - rbr = ioread8(priv->membase + PCH_UART_RBR); - buf[i++] = rbr; - } - return i; -} - -static unsigned int pch_uart_hal_get_iid(struct eg20t_port *priv) -{ - unsigned int iir; - int ret; - - iir = ioread8(priv->membase + UART_IIR); - ret = (iir & (PCH_UART_IIR_IID | PCH_UART_IIR_TOI | PCH_UART_IIR_IP)); - return ret; -} - -static u8 pch_uart_hal_get_line_status(struct eg20t_port *priv) -{ - return ioread8(priv->membase + UART_LSR); -} - -static void pch_uart_hal_set_break(struct eg20t_port *priv, int on) -{ - unsigned int lcr; - - lcr = ioread8(priv->membase + UART_LCR); - if (on) - lcr |= PCH_UART_LCR_SB; - else - lcr &= ~PCH_UART_LCR_SB; - - iowrite8(lcr, priv->membase + UART_LCR); -} - -static int push_rx(struct eg20t_port *priv, const unsigned char *buf, - int size) -{ - struct uart_port *port; - struct tty_struct *tty; - - port = &priv->port; - tty = tty_port_tty_get(&port->state->port); - if (!tty) { - pr_debug("%s:tty is busy now", __func__); - return -EBUSY; - } - - tty_insert_flip_string(tty, buf, size); - tty_flip_buffer_push(tty); - tty_kref_put(tty); - - return 0; -} - -static int pop_tx_x(struct eg20t_port *priv, unsigned char *buf) -{ - int ret; - struct uart_port *port = &priv->port; - - if (port->x_char) { - pr_debug("%s:X character send %02x (%lu)\n", __func__, - port->x_char, jiffies); - buf[0] = port->x_char; - port->x_char = 0; - ret = 1; - } else { - ret = 0; - } - - return ret; -} - -static int dma_push_rx(struct eg20t_port *priv, int size) -{ - struct tty_struct *tty; - int room; - struct uart_port *port = &priv->port; - - port = &priv->port; - tty = tty_port_tty_get(&port->state->port); - if (!tty) { - pr_debug("%s:tty is busy now", __func__); - return 0; - } - - room = tty_buffer_request_room(tty, size); - - if (room < size) - dev_warn(port->dev, "Rx overrun: dropping %u bytes\n", - size - room); - if (!room) - return room; - - tty_insert_flip_string(tty, sg_virt(&priv->sg_rx), size); - - port->icount.rx += room; - tty_kref_put(tty); - - return room; -} - -static void pch_free_dma(struct uart_port *port) -{ - struct eg20t_port *priv; - priv = container_of(port, struct eg20t_port, port); - - if (priv->chan_tx) { - dma_release_channel(priv->chan_tx); - priv->chan_tx = NULL; - } - if (priv->chan_rx) { - dma_release_channel(priv->chan_rx); - priv->chan_rx = NULL; - } - if (sg_dma_address(&priv->sg_rx)) - dma_free_coherent(port->dev, port->fifosize, - sg_virt(&priv->sg_rx), - sg_dma_address(&priv->sg_rx)); - - return; -} - -static bool filter(struct dma_chan *chan, void *slave) -{ - struct pch_dma_slave *param = slave; - - if ((chan->chan_id == param->chan_id) && (param->dma_dev == - chan->device->dev)) { - chan->private = param; - return true; - } else { - return false; - } -} - -static void pch_request_dma(struct uart_port *port) -{ - dma_cap_mask_t mask; - struct dma_chan *chan; - struct pci_dev *dma_dev; - struct pch_dma_slave *param; - struct eg20t_port *priv = - container_of(port, struct eg20t_port, port); - dma_cap_zero(mask); - dma_cap_set(DMA_SLAVE, mask); - - dma_dev = pci_get_bus_and_slot(2, PCI_DEVFN(0xa, 0)); /* Get DMA's dev - information */ - /* Set Tx DMA */ - param = &priv->param_tx; - param->dma_dev = &dma_dev->dev; - param->chan_id = priv->port.line; - param->tx_reg = port->mapbase + UART_TX; - chan = dma_request_channel(mask, filter, param); - if (!chan) { - pr_err("%s:dma_request_channel FAILS(Tx)\n", __func__); - return; - } - priv->chan_tx = chan; - - /* Set Rx DMA */ - param = &priv->param_rx; - param->dma_dev = &dma_dev->dev; - param->chan_id = priv->port.line + 1; /* Rx = Tx + 1 */ - param->rx_reg = port->mapbase + UART_RX; - chan = dma_request_channel(mask, filter, param); - if (!chan) { - pr_err("%s:dma_request_channel FAILS(Rx)\n", __func__); - dma_release_channel(priv->chan_tx); - return; - } - - /* Get Consistent memory for DMA */ - priv->rx_buf_virt = dma_alloc_coherent(port->dev, port->fifosize, - &priv->rx_buf_dma, GFP_KERNEL); - priv->chan_rx = chan; -} - -static void pch_dma_rx_complete(void *arg) -{ - struct eg20t_port *priv = arg; - struct uart_port *port = &priv->port; - struct tty_struct *tty = tty_port_tty_get(&port->state->port); - - if (!tty) { - pr_debug("%s:tty is busy now", __func__); - return; - } - - if (dma_push_rx(priv, priv->trigger_level)) - tty_flip_buffer_push(tty); - - tty_kref_put(tty); -} - -static void pch_dma_tx_complete(void *arg) -{ - struct eg20t_port *priv = arg; - struct uart_port *port = &priv->port; - struct circ_buf *xmit = &port->state->xmit; - - xmit->tail += sg_dma_len(&priv->sg_tx); - xmit->tail &= UART_XMIT_SIZE - 1; - port->icount.tx += sg_dma_len(&priv->sg_tx); - - async_tx_ack(priv->desc_tx); - priv->tx_dma_use = 0; -} - -static int pop_tx(struct eg20t_port *priv, unsigned char *buf, int size) -{ - int count = 0; - struct uart_port *port = &priv->port; - struct circ_buf *xmit = &port->state->xmit; - - if (uart_tx_stopped(port) || uart_circ_empty(xmit) || count >= size) - goto pop_tx_end; - - do { - int cnt_to_end = - CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE); - int sz = min(size - count, cnt_to_end); - memcpy(&buf[count], &xmit->buf[xmit->tail], sz); - xmit->tail = (xmit->tail + sz) & (UART_XMIT_SIZE - 1); - count += sz; - } while (!uart_circ_empty(xmit) && count < size); - -pop_tx_end: - pr_debug("%d characters. Remained %d characters. (%lu)\n", - count, size - count, jiffies); - - return count; -} - -static int handle_rx_to(struct eg20t_port *priv) -{ - struct pch_uart_buffer *buf; - int rx_size; - int ret; - if (!priv->start_rx) { - pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_RX_INT); - return 0; - } - buf = &priv->rxbuf; - do { - rx_size = pch_uart_hal_read(priv, buf->buf, buf->size); - ret = push_rx(priv, buf->buf, rx_size); - if (ret) - return 0; - } while (rx_size == buf->size); - - return PCH_UART_HANDLED_RX_INT; -} - -static int handle_rx(struct eg20t_port *priv) -{ - return handle_rx_to(priv); -} - -static int dma_handle_rx(struct eg20t_port *priv) -{ - struct uart_port *port = &priv->port; - struct dma_async_tx_descriptor *desc; - struct scatterlist *sg; - - priv = container_of(port, struct eg20t_port, port); - sg = &priv->sg_rx; - - sg_init_table(&priv->sg_rx, 1); /* Initialize SG table */ - - sg_dma_len(sg) = priv->fifo_size; - - sg_set_page(&priv->sg_rx, virt_to_page(priv->rx_buf_virt), - sg_dma_len(sg), (unsigned long)priv->rx_buf_virt & - ~PAGE_MASK); - - sg_dma_address(sg) = priv->rx_buf_dma; - - desc = priv->chan_rx->device->device_prep_slave_sg(priv->chan_rx, - sg, 1, DMA_FROM_DEVICE, - DMA_PREP_INTERRUPT); - if (!desc) - return 0; - - priv->desc_rx = desc; - desc->callback = pch_dma_rx_complete; - desc->callback_param = priv; - desc->tx_submit(desc); - dma_async_issue_pending(priv->chan_rx); - - return PCH_UART_HANDLED_RX_INT; -} - -static unsigned int handle_tx(struct eg20t_port *priv) -{ - struct uart_port *port = &priv->port; - struct circ_buf *xmit = &port->state->xmit; - int ret; - int fifo_size; - int tx_size; - int size; - int tx_empty; - - if (!priv->start_tx) { - pr_info("%s:Tx isn't started. (%lu)\n", __func__, jiffies); - pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_TX_INT); - priv->tx_empty = 1; - return 0; - } - - fifo_size = max(priv->fifo_size, 1); - tx_empty = 1; - if (pop_tx_x(priv, xmit->buf)) { - pch_uart_hal_write(priv, xmit->buf, 1); - port->icount.tx++; - tx_empty = 0; - fifo_size--; - } - size = min(xmit->head - xmit->tail, fifo_size); - tx_size = pop_tx(priv, xmit->buf, size); - if (tx_size > 0) { - ret = pch_uart_hal_write(priv, xmit->buf, tx_size); - port->icount.tx += ret; - tx_empty = 0; - } - - priv->tx_empty = tx_empty; - - if (tx_empty) - pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_TX_INT); - - return PCH_UART_HANDLED_TX_INT; -} - -static unsigned int dma_handle_tx(struct eg20t_port *priv) -{ - struct uart_port *port = &priv->port; - struct circ_buf *xmit = &port->state->xmit; - struct scatterlist *sg = &priv->sg_tx; - int nent; - int fifo_size; - int tx_empty; - struct dma_async_tx_descriptor *desc; - - if (!priv->start_tx) { - pr_info("%s:Tx isn't started. (%lu)\n", __func__, jiffies); - pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_TX_INT); - priv->tx_empty = 1; - return 0; - } - - fifo_size = max(priv->fifo_size, 1); - tx_empty = 1; - if (pop_tx_x(priv, xmit->buf)) { - pch_uart_hal_write(priv, xmit->buf, 1); - port->icount.tx++; - tx_empty = 0; - fifo_size--; - } - - pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_TX_INT); - - priv->tx_dma_use = 1; - - sg_init_table(&priv->sg_tx, 1); /* Initialize SG table */ - - sg_set_page(&priv->sg_tx, virt_to_page(xmit->buf), - UART_XMIT_SIZE, (int)xmit->buf & ~PAGE_MASK); - - nent = dma_map_sg(port->dev, &priv->sg_tx, 1, DMA_TO_DEVICE); - if (!nent) { - pr_err("%s:dma_map_sg Failed\n", __func__); - return 0; - } - - sg->offset = xmit->tail & (UART_XMIT_SIZE - 1); - sg_dma_address(sg) = (sg_dma_address(sg) & ~(UART_XMIT_SIZE - 1)) + - sg->offset; - sg_dma_len(sg) = min((int)CIRC_CNT(xmit->head, xmit->tail, - UART_XMIT_SIZE), CIRC_CNT_TO_END(xmit->head, - xmit->tail, UART_XMIT_SIZE)); - - desc = priv->chan_tx->device->device_prep_slave_sg(priv->chan_tx, - sg, nent, DMA_TO_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); - if (!desc) { - pr_err("%s:device_prep_slave_sg Failed\n", __func__); - return 0; - } - - dma_sync_sg_for_device(port->dev, sg, 1, DMA_TO_DEVICE); - - priv->desc_tx = desc; - desc->callback = pch_dma_tx_complete; - desc->callback_param = priv; - - desc->tx_submit(desc); - - dma_async_issue_pending(priv->chan_tx); - - return PCH_UART_HANDLED_TX_INT; -} - -static void pch_uart_err_ir(struct eg20t_port *priv, unsigned int lsr) -{ - u8 fcr = ioread8(priv->membase + UART_FCR); - - /* Reset FIFO */ - fcr |= UART_FCR_CLEAR_RCVR; - iowrite8(fcr, priv->membase + UART_FCR); - - if (lsr & PCH_UART_LSR_ERR) - dev_err(&priv->pdev->dev, "Error data in FIFO\n"); - - if (lsr & UART_LSR_FE) - dev_err(&priv->pdev->dev, "Framing Error\n"); - - if (lsr & UART_LSR_PE) - dev_err(&priv->pdev->dev, "Parity Error\n"); - - if (lsr & UART_LSR_OE) - dev_err(&priv->pdev->dev, "Overrun Error\n"); -} - -static irqreturn_t pch_uart_interrupt(int irq, void *dev_id) -{ - struct eg20t_port *priv = dev_id; - unsigned int handled; - u8 lsr; - int ret = 0; - unsigned int iid; - unsigned long flags; - - spin_lock_irqsave(&priv->port.lock, flags); - handled = 0; - while ((iid = pch_uart_hal_get_iid(priv)) > 1) { - switch (iid) { - case PCH_UART_IID_RLS: /* Receiver Line Status */ - lsr = pch_uart_hal_get_line_status(priv); - if (lsr & (PCH_UART_LSR_ERR | UART_LSR_FE | - UART_LSR_PE | UART_LSR_OE)) { - pch_uart_err_ir(priv, lsr); - ret = PCH_UART_HANDLED_RX_ERR_INT; - } - break; - case PCH_UART_IID_RDR: /* Received Data Ready */ - if (priv->use_dma) - ret = dma_handle_rx(priv); - else - ret = handle_rx(priv); - break; - case PCH_UART_IID_RDR_TO: /* Received Data Ready - (FIFO Timeout) */ - ret = handle_rx_to(priv); - break; - case PCH_UART_IID_THRE: /* Transmitter Holding Register - Empty */ - if (priv->use_dma) - ret = dma_handle_tx(priv); - else - ret = handle_tx(priv); - break; - case PCH_UART_IID_MS: /* Modem Status */ - ret = PCH_UART_HANDLED_MS_INT; - break; - default: /* Never junp to this label */ - pr_err("%s:iid=%d (%lu)\n", __func__, iid, jiffies); - ret = -1; - break; - } - handled |= (unsigned int)ret; - } - if (handled == 0 && iid <= 1) { - if (priv->int_dis_flag) - priv->int_dis_flag = 0; - } - - spin_unlock_irqrestore(&priv->port.lock, flags); - return IRQ_RETVAL(handled); -} - -/* This function tests whether the transmitter fifo and shifter for the port - described by 'port' is empty. */ -static unsigned int pch_uart_tx_empty(struct uart_port *port) -{ - struct eg20t_port *priv; - int ret; - priv = container_of(port, struct eg20t_port, port); - if (priv->tx_empty) - ret = TIOCSER_TEMT; - else - ret = 0; - - return ret; -} - -/* Returns the current state of modem control inputs. */ -static unsigned int pch_uart_get_mctrl(struct uart_port *port) -{ - struct eg20t_port *priv; - u8 modem; - unsigned int ret = 0; - - priv = container_of(port, struct eg20t_port, port); - modem = pch_uart_hal_get_modem(priv); - - if (modem & UART_MSR_DCD) - ret |= TIOCM_CAR; - - if (modem & UART_MSR_RI) - ret |= TIOCM_RNG; - - if (modem & UART_MSR_DSR) - ret |= TIOCM_DSR; - - if (modem & UART_MSR_CTS) - ret |= TIOCM_CTS; - - return ret; -} - -static void pch_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - u32 mcr = 0; - unsigned int dat; - struct eg20t_port *priv = container_of(port, struct eg20t_port, port); - - if (mctrl & TIOCM_DTR) - mcr |= UART_MCR_DTR; - if (mctrl & TIOCM_RTS) - mcr |= UART_MCR_RTS; - if (mctrl & TIOCM_LOOP) - mcr |= UART_MCR_LOOP; - - if (mctrl) { - dat = pch_uart_get_mctrl(port); - dat |= mcr; - iowrite8(dat, priv->membase + UART_MCR); - } -} - -static void pch_uart_stop_tx(struct uart_port *port) -{ - struct eg20t_port *priv; - priv = container_of(port, struct eg20t_port, port); - priv->start_tx = 0; - priv->tx_dma_use = 0; -} - -static void pch_uart_start_tx(struct uart_port *port) -{ - struct eg20t_port *priv; - - priv = container_of(port, struct eg20t_port, port); - - if (priv->use_dma) - if (priv->tx_dma_use) - return; - - priv->start_tx = 1; - pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_TX_INT); -} - -static void pch_uart_stop_rx(struct uart_port *port) -{ - struct eg20t_port *priv; - priv = container_of(port, struct eg20t_port, port); - priv->start_rx = 0; - pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_RX_INT); - priv->int_dis_flag = 1; -} - -/* Enable the modem status interrupts. */ -static void pch_uart_enable_ms(struct uart_port *port) -{ - struct eg20t_port *priv; - priv = container_of(port, struct eg20t_port, port); - pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_MS_INT); -} - -/* Control the transmission of a break signal. */ -static void pch_uart_break_ctl(struct uart_port *port, int ctl) -{ - struct eg20t_port *priv; - unsigned long flags; - - priv = container_of(port, struct eg20t_port, port); - spin_lock_irqsave(&port->lock, flags); - pch_uart_hal_set_break(priv, ctl); - spin_unlock_irqrestore(&port->lock, flags); -} - -/* Grab any interrupt resources and initialise any low level driver state. */ -static int pch_uart_startup(struct uart_port *port) -{ - struct eg20t_port *priv; - int ret; - int fifo_size; - int trigger_level; - - priv = container_of(port, struct eg20t_port, port); - priv->tx_empty = 1; - port->uartclk = priv->base_baud; - pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_ALL_INT); - ret = pch_uart_hal_set_line(priv, default_baud, - PCH_UART_HAL_PARITY_NONE, PCH_UART_HAL_8BIT, - PCH_UART_HAL_STB1); - if (ret) - return ret; - - switch (priv->fifo_size) { - case 256: - fifo_size = PCH_UART_HAL_FIFO256; - break; - case 64: - fifo_size = PCH_UART_HAL_FIFO64; - break; - case 16: - fifo_size = PCH_UART_HAL_FIFO16; - case 1: - default: - fifo_size = PCH_UART_HAL_FIFO_DIS; - break; - } - - switch (priv->trigger) { - case PCH_UART_HAL_TRIGGER1: - trigger_level = 1; - break; - case PCH_UART_HAL_TRIGGER_L: - trigger_level = priv->fifo_size / 4; - break; - case PCH_UART_HAL_TRIGGER_M: - trigger_level = priv->fifo_size / 2; - break; - case PCH_UART_HAL_TRIGGER_H: - default: - trigger_level = priv->fifo_size - (priv->fifo_size / 8); - break; - } - - priv->trigger_level = trigger_level; - ret = pch_uart_hal_set_fifo(priv, PCH_UART_HAL_DMA_MODE0, - fifo_size, priv->trigger); - if (ret < 0) - return ret; - - ret = request_irq(priv->port.irq, pch_uart_interrupt, IRQF_SHARED, - KBUILD_MODNAME, priv); - if (ret < 0) - return ret; - - if (priv->use_dma) - pch_request_dma(port); - - priv->start_rx = 1; - pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_RX_INT); - uart_update_timeout(port, CS8, default_baud); - - return 0; -} - -static void pch_uart_shutdown(struct uart_port *port) -{ - struct eg20t_port *priv; - int ret; - - priv = container_of(port, struct eg20t_port, port); - pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_ALL_INT); - pch_uart_hal_fifo_reset(priv, PCH_UART_HAL_CLR_ALL_FIFO); - ret = pch_uart_hal_set_fifo(priv, PCH_UART_HAL_DMA_MODE0, - PCH_UART_HAL_FIFO_DIS, PCH_UART_HAL_TRIGGER1); - if (ret) - pr_err("pch_uart_hal_set_fifo Failed(ret=%d)\n", ret); - - if (priv->use_dma_flag) - pch_free_dma(port); - - free_irq(priv->port.irq, priv); -} - -/* Change the port parameters, including word length, parity, stop - *bits. Update read_status_mask and ignore_status_mask to indicate - *the types of events we are interested in receiving. */ -static void pch_uart_set_termios(struct uart_port *port, - struct ktermios *termios, struct ktermios *old) -{ - int baud; - int rtn; - unsigned int parity, bits, stb; - struct eg20t_port *priv; - unsigned long flags; - - priv = container_of(port, struct eg20t_port, port); - switch (termios->c_cflag & CSIZE) { - case CS5: - bits = PCH_UART_HAL_5BIT; - break; - case CS6: - bits = PCH_UART_HAL_6BIT; - break; - case CS7: - bits = PCH_UART_HAL_7BIT; - break; - default: /* CS8 */ - bits = PCH_UART_HAL_8BIT; - break; - } - if (termios->c_cflag & CSTOPB) - stb = PCH_UART_HAL_STB2; - else - stb = PCH_UART_HAL_STB1; - - if (termios->c_cflag & PARENB) { - if (!(termios->c_cflag & PARODD)) - parity = PCH_UART_HAL_PARITY_ODD; - else - parity = PCH_UART_HAL_PARITY_EVEN; - - } else { - parity = PCH_UART_HAL_PARITY_NONE; - } - termios->c_cflag &= ~CMSPAR; /* Mark/Space parity is not supported */ - - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16); - - spin_lock_irqsave(&port->lock, flags); - - uart_update_timeout(port, termios->c_cflag, baud); - rtn = pch_uart_hal_set_line(priv, baud, parity, bits, stb); - if (rtn) - goto out; - - /* Don't rewrite B0 */ - if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); - -out: - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *pch_uart_type(struct uart_port *port) -{ - return KBUILD_MODNAME; -} - -static void pch_uart_release_port(struct uart_port *port) -{ - struct eg20t_port *priv; - - priv = container_of(port, struct eg20t_port, port); - pci_iounmap(priv->pdev, priv->membase); - pci_release_regions(priv->pdev); -} - -static int pch_uart_request_port(struct uart_port *port) -{ - struct eg20t_port *priv; - int ret; - void __iomem *membase; - - priv = container_of(port, struct eg20t_port, port); - ret = pci_request_regions(priv->pdev, KBUILD_MODNAME); - if (ret < 0) - return -EBUSY; - - membase = pci_iomap(priv->pdev, 1, 0); - if (!membase) { - pci_release_regions(priv->pdev); - return -EBUSY; - } - priv->membase = port->membase = membase; - - return 0; -} - -static void pch_uart_config_port(struct uart_port *port, int type) -{ - struct eg20t_port *priv; - - priv = container_of(port, struct eg20t_port, port); - if (type & UART_CONFIG_TYPE) { - port->type = priv->port_type; - pch_uart_request_port(port); - } -} - -static int pch_uart_verify_port(struct uart_port *port, - struct serial_struct *serinfo) -{ - struct eg20t_port *priv; - - priv = container_of(port, struct eg20t_port, port); - if (serinfo->flags & UPF_LOW_LATENCY) { - pr_info("PCH UART : Use PIO Mode (without DMA)\n"); - priv->use_dma = 0; - serinfo->flags &= ~UPF_LOW_LATENCY; - } else { -#ifndef CONFIG_PCH_DMA - pr_err("%s : PCH DMA is not Loaded.\n", __func__); - return -EOPNOTSUPP; -#endif - priv->use_dma = 1; - priv->use_dma_flag = 1; - pr_info("PCH UART : Use DMA Mode\n"); - } - - return 0; -} - -static struct uart_ops pch_uart_ops = { - .tx_empty = pch_uart_tx_empty, - .set_mctrl = pch_uart_set_mctrl, - .get_mctrl = pch_uart_get_mctrl, - .stop_tx = pch_uart_stop_tx, - .start_tx = pch_uart_start_tx, - .stop_rx = pch_uart_stop_rx, - .enable_ms = pch_uart_enable_ms, - .break_ctl = pch_uart_break_ctl, - .startup = pch_uart_startup, - .shutdown = pch_uart_shutdown, - .set_termios = pch_uart_set_termios, -/* .pm = pch_uart_pm, Not supported yet */ -/* .set_wake = pch_uart_set_wake, Not supported yet */ - .type = pch_uart_type, - .release_port = pch_uart_release_port, - .request_port = pch_uart_request_port, - .config_port = pch_uart_config_port, - .verify_port = pch_uart_verify_port -}; - -static struct uart_driver pch_uart_driver = { - .owner = THIS_MODULE, - .driver_name = KBUILD_MODNAME, - .dev_name = PCH_UART_DRIVER_DEVICE, - .major = 0, - .minor = 0, - .nr = PCH_UART_NR, -}; - -static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev, - int port_type) -{ - struct eg20t_port *priv; - int ret; - unsigned int iobase; - unsigned int mapbase; - unsigned char *rxbuf; - int fifosize, base_baud; - static int num; - - priv = kzalloc(sizeof(struct eg20t_port), GFP_KERNEL); - if (priv == NULL) - goto init_port_alloc_err; - - rxbuf = (unsigned char *)__get_free_page(GFP_KERNEL); - if (!rxbuf) - goto init_port_free_txbuf; - - switch (port_type) { - case PORT_UNKNOWN: - fifosize = 256; /* UART0 */ - base_baud = 1843200; /* 1.8432MHz */ - break; - case PORT_8250: - fifosize = 64; /* UART1~3 */ - base_baud = 1843200; /* 1.8432MHz */ - break; - default: - dev_err(&pdev->dev, "Invalid Port Type(=%d)\n", port_type); - goto init_port_hal_free; - } - - iobase = pci_resource_start(pdev, 0); - mapbase = pci_resource_start(pdev, 1); - priv->mapbase = mapbase; - priv->iobase = iobase; - priv->pdev = pdev; - priv->tx_empty = 1; - priv->rxbuf.buf = rxbuf; - priv->rxbuf.size = PAGE_SIZE; - - priv->fifo_size = fifosize; - priv->base_baud = base_baud; - priv->port_type = PORT_MAX_8250 + port_type + 1; - priv->port.dev = &pdev->dev; - priv->port.iobase = iobase; - priv->port.membase = NULL; - priv->port.mapbase = mapbase; - priv->port.irq = pdev->irq; - priv->port.iotype = UPIO_PORT; - priv->port.ops = &pch_uart_ops; - priv->port.flags = UPF_BOOT_AUTOCONF; - priv->port.fifosize = fifosize; - priv->port.line = num++; - priv->trigger = PCH_UART_HAL_TRIGGER_M; - - pci_set_drvdata(pdev, priv); - pch_uart_hal_request(pdev, fifosize, base_baud); - ret = uart_add_one_port(&pch_uart_driver, &priv->port); - if (ret < 0) - goto init_port_hal_free; - - return priv; - -init_port_hal_free: - free_page((unsigned long)rxbuf); -init_port_free_txbuf: - kfree(priv); -init_port_alloc_err: - - return NULL; -} - -static void pch_uart_exit_port(struct eg20t_port *priv) -{ - uart_remove_one_port(&pch_uart_driver, &priv->port); - pci_set_drvdata(priv->pdev, NULL); - free_page((unsigned long)priv->rxbuf.buf); -} - -static void pch_uart_pci_remove(struct pci_dev *pdev) -{ - struct eg20t_port *priv; - - priv = (struct eg20t_port *)pci_get_drvdata(pdev); - pch_uart_exit_port(priv); - pci_disable_device(pdev); - kfree(priv); - return; -} -#ifdef CONFIG_PM -static int pch_uart_pci_suspend(struct pci_dev *pdev, pm_message_t state) -{ - struct eg20t_port *priv = pci_get_drvdata(pdev); - - uart_suspend_port(&pch_uart_driver, &priv->port); - - pci_save_state(pdev); - pci_set_power_state(pdev, pci_choose_state(pdev, state)); - return 0; -} - -static int pch_uart_pci_resume(struct pci_dev *pdev) -{ - struct eg20t_port *priv = pci_get_drvdata(pdev); - int ret; - - pci_set_power_state(pdev, PCI_D0); - pci_restore_state(pdev); - - ret = pci_enable_device(pdev); - if (ret) { - dev_err(&pdev->dev, - "%s-pci_enable_device failed(ret=%d) ", __func__, ret); - return ret; - } - - uart_resume_port(&pch_uart_driver, &priv->port); - - return 0; -} -#else -#define pch_uart_pci_suspend NULL -#define pch_uart_pci_resume NULL -#endif - -static DEFINE_PCI_DEVICE_TABLE(pch_uart_pci_id) = { - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8811), - .driver_data = PCH_UART_8LINE}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8812), - .driver_data = PCH_UART_2LINE}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8813), - .driver_data = PCH_UART_2LINE}, - {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8814), - .driver_data = PCH_UART_2LINE}, - {0,}, -}; - -static int __devinit pch_uart_pci_probe(struct pci_dev *pdev, - const struct pci_device_id *id) -{ - int ret; - struct eg20t_port *priv; - - ret = pci_enable_device(pdev); - if (ret < 0) - goto probe_error; - - priv = pch_uart_init_port(pdev, id->driver_data); - if (!priv) { - ret = -EBUSY; - goto probe_disable_device; - } - pci_set_drvdata(pdev, priv); - - return ret; - -probe_disable_device: - pci_disable_device(pdev); -probe_error: - return ret; -} - -static struct pci_driver pch_uart_pci_driver = { - .name = "pch_uart", - .id_table = pch_uart_pci_id, - .probe = pch_uart_pci_probe, - .remove = __devexit_p(pch_uart_pci_remove), - .suspend = pch_uart_pci_suspend, - .resume = pch_uart_pci_resume, -}; - -static int __init pch_uart_module_init(void) -{ - int ret; - - /* register as UART driver */ - ret = uart_register_driver(&pch_uart_driver); - if (ret < 0) - return ret; - - /* register as PCI driver */ - ret = pci_register_driver(&pch_uart_pci_driver); - if (ret < 0) - uart_unregister_driver(&pch_uart_driver); - - return ret; -} -module_init(pch_uart_module_init); - -static void __exit pch_uart_module_exit(void) -{ - pci_unregister_driver(&pch_uart_pci_driver); - uart_unregister_driver(&pch_uart_driver); -} -module_exit(pch_uart_module_exit); - -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("Intel EG20T PCH UART PCI Driver"); -module_param(default_baud, uint, S_IRUGO); diff --git a/drivers/serial/pmac_zilog.c b/drivers/serial/pmac_zilog.c deleted file mode 100644 index 5b9cde79e4ea..000000000000 --- a/drivers/serial/pmac_zilog.c +++ /dev/null @@ -1,2208 +0,0 @@ -/* - * linux/drivers/serial/pmac_zilog.c - * - * Driver for PowerMac Z85c30 based ESCC cell found in the - * "macio" ASICs of various PowerMac models - * - * Copyright (C) 2003 Ben. Herrenschmidt (benh@kernel.crashing.org) - * - * Derived from drivers/macintosh/macserial.c by Paul Mackerras - * and drivers/serial/sunzilog.c by David S. Miller - * - * Hrm... actually, I ripped most of sunzilog (Thanks David !) and - * adapted special tweaks needed for us. I don't think it's worth - * merging back those though. The DMA code still has to get in - * and once done, I expect that driver to remain fairly stable in - * the long term, unless we change the driver model again... - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * 2004-08-06 Harald Welte <laforge@gnumonks.org> - * - Enable BREAK interrupt - * - Add support for sysreq - * - * TODO: - Add DMA support - * - Defer port shutdown to a few seconds after close - * - maybe put something right into uap->clk_divisor - */ - -#undef DEBUG -#undef DEBUG_HARD -#undef USE_CTRL_O_SYSRQ - -#include <linux/module.h> -#include <linux/tty.h> - -#include <linux/tty_flip.h> -#include <linux/major.h> -#include <linux/string.h> -#include <linux/fcntl.h> -#include <linux/mm.h> -#include <linux/kernel.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/adb.h> -#include <linux/pmu.h> -#include <linux/bitops.h> -#include <linux/sysrq.h> -#include <linux/mutex.h> -#include <asm/sections.h> -#include <asm/io.h> -#include <asm/irq.h> - -#ifdef CONFIG_PPC_PMAC -#include <asm/prom.h> -#include <asm/machdep.h> -#include <asm/pmac_feature.h> -#include <asm/dbdma.h> -#include <asm/macio.h> -#else -#include <linux/platform_device.h> -#define of_machine_is_compatible(x) (0) -#endif - -#if defined (CONFIG_SERIAL_PMACZILOG_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/serial.h> -#include <linux/serial_core.h> - -#include "pmac_zilog.h" - -/* Not yet implemented */ -#undef HAS_DBDMA - -static char version[] __initdata = "pmac_zilog: 0.6 (Benjamin Herrenschmidt <benh@kernel.crashing.org>)"; -MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>"); -MODULE_DESCRIPTION("Driver for the Mac and PowerMac serial ports."); -MODULE_LICENSE("GPL"); - -#ifdef CONFIG_SERIAL_PMACZILOG_TTYS -#define PMACZILOG_MAJOR TTY_MAJOR -#define PMACZILOG_MINOR 64 -#define PMACZILOG_NAME "ttyS" -#else -#define PMACZILOG_MAJOR 204 -#define PMACZILOG_MINOR 192 -#define PMACZILOG_NAME "ttyPZ" -#endif - - -/* - * For the sake of early serial console, we can do a pre-probe - * (optional) of the ports at rather early boot time. - */ -static struct uart_pmac_port pmz_ports[MAX_ZS_PORTS]; -static int pmz_ports_count; -static DEFINE_MUTEX(pmz_irq_mutex); - -static struct uart_driver pmz_uart_reg = { - .owner = THIS_MODULE, - .driver_name = PMACZILOG_NAME, - .dev_name = PMACZILOG_NAME, - .major = PMACZILOG_MAJOR, - .minor = PMACZILOG_MINOR, -}; - - -/* - * Load all registers to reprogram the port - * This function must only be called when the TX is not busy. The UART - * port lock must be held and local interrupts disabled. - */ -static void pmz_load_zsregs(struct uart_pmac_port *uap, u8 *regs) -{ - int i; - - if (ZS_IS_ASLEEP(uap)) - return; - - /* Let pending transmits finish. */ - for (i = 0; i < 1000; i++) { - unsigned char stat = read_zsreg(uap, R1); - if (stat & ALL_SNT) - break; - udelay(100); - } - - ZS_CLEARERR(uap); - zssync(uap); - ZS_CLEARFIFO(uap); - zssync(uap); - ZS_CLEARERR(uap); - - /* Disable all interrupts. */ - write_zsreg(uap, R1, - regs[R1] & ~(RxINT_MASK | TxINT_ENAB | EXT_INT_ENAB)); - - /* Set parity, sync config, stop bits, and clock divisor. */ - write_zsreg(uap, R4, regs[R4]); - - /* Set misc. TX/RX control bits. */ - write_zsreg(uap, R10, regs[R10]); - - /* Set TX/RX controls sans the enable bits. */ - write_zsreg(uap, R3, regs[R3] & ~RxENABLE); - write_zsreg(uap, R5, regs[R5] & ~TxENABLE); - - /* now set R7 "prime" on ESCC */ - write_zsreg(uap, R15, regs[R15] | EN85C30); - write_zsreg(uap, R7, regs[R7P]); - - /* make sure we use R7 "non-prime" on ESCC */ - write_zsreg(uap, R15, regs[R15] & ~EN85C30); - - /* Synchronous mode config. */ - write_zsreg(uap, R6, regs[R6]); - write_zsreg(uap, R7, regs[R7]); - - /* Disable baud generator. */ - write_zsreg(uap, R14, regs[R14] & ~BRENAB); - - /* Clock mode control. */ - write_zsreg(uap, R11, regs[R11]); - - /* Lower and upper byte of baud rate generator divisor. */ - write_zsreg(uap, R12, regs[R12]); - write_zsreg(uap, R13, regs[R13]); - - /* Now rewrite R14, with BRENAB (if set). */ - write_zsreg(uap, R14, regs[R14]); - - /* Reset external status interrupts. */ - write_zsreg(uap, R0, RES_EXT_INT); - write_zsreg(uap, R0, RES_EXT_INT); - - /* Rewrite R3/R5, this time without enables masked. */ - write_zsreg(uap, R3, regs[R3]); - write_zsreg(uap, R5, regs[R5]); - - /* Rewrite R1, this time without IRQ enabled masked. */ - write_zsreg(uap, R1, regs[R1]); - - /* Enable interrupts */ - write_zsreg(uap, R9, regs[R9]); -} - -/* - * We do like sunzilog to avoid disrupting pending Tx - * Reprogram the Zilog channel HW registers with the copies found in the - * software state struct. If the transmitter is busy, we defer this update - * until the next TX complete interrupt. Else, we do it right now. - * - * The UART port lock must be held and local interrupts disabled. - */ -static void pmz_maybe_update_regs(struct uart_pmac_port *uap) -{ - if (!ZS_REGS_HELD(uap)) { - if (ZS_TX_ACTIVE(uap)) { - uap->flags |= PMACZILOG_FLAG_REGS_HELD; - } else { - pmz_debug("pmz: maybe_update_regs: updating\n"); - pmz_load_zsregs(uap, uap->curregs); - } - } -} - -static struct tty_struct *pmz_receive_chars(struct uart_pmac_port *uap) -{ - struct tty_struct *tty = NULL; - unsigned char ch, r1, drop, error, flag; - int loops = 0; - - /* The interrupt can be enabled when the port isn't open, typically - * that happens when using one port is open and the other closed (stale - * interrupt) or when one port is used as a console. - */ - if (!ZS_IS_OPEN(uap)) { - pmz_debug("pmz: draining input\n"); - /* Port is closed, drain input data */ - for (;;) { - if ((++loops) > 1000) - goto flood; - (void)read_zsreg(uap, R1); - write_zsreg(uap, R0, ERR_RES); - (void)read_zsdata(uap); - ch = read_zsreg(uap, R0); - if (!(ch & Rx_CH_AV)) - break; - } - return NULL; - } - - /* Sanity check, make sure the old bug is no longer happening */ - if (uap->port.state == NULL || uap->port.state->port.tty == NULL) { - WARN_ON(1); - (void)read_zsdata(uap); - return NULL; - } - tty = uap->port.state->port.tty; - - while (1) { - error = 0; - drop = 0; - - r1 = read_zsreg(uap, R1); - ch = read_zsdata(uap); - - if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR)) { - write_zsreg(uap, R0, ERR_RES); - zssync(uap); - } - - ch &= uap->parity_mask; - if (ch == 0 && uap->flags & PMACZILOG_FLAG_BREAK) { - uap->flags &= ~PMACZILOG_FLAG_BREAK; - } - -#if defined(CONFIG_MAGIC_SYSRQ) && defined(CONFIG_SERIAL_CORE_CONSOLE) -#ifdef USE_CTRL_O_SYSRQ - /* Handle the SysRq ^O Hack */ - if (ch == '\x0f') { - uap->port.sysrq = jiffies + HZ*5; - goto next_char; - } -#endif /* USE_CTRL_O_SYSRQ */ - if (uap->port.sysrq) { - int swallow; - spin_unlock(&uap->port.lock); - swallow = uart_handle_sysrq_char(&uap->port, ch); - spin_lock(&uap->port.lock); - if (swallow) - goto next_char; - } -#endif /* CONFIG_MAGIC_SYSRQ && CONFIG_SERIAL_CORE_CONSOLE */ - - /* A real serial line, record the character and status. */ - if (drop) - goto next_char; - - flag = TTY_NORMAL; - uap->port.icount.rx++; - - if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR | BRK_ABRT)) { - error = 1; - if (r1 & BRK_ABRT) { - pmz_debug("pmz: got break !\n"); - r1 &= ~(PAR_ERR | CRC_ERR); - uap->port.icount.brk++; - if (uart_handle_break(&uap->port)) - goto next_char; - } - else if (r1 & PAR_ERR) - uap->port.icount.parity++; - else if (r1 & CRC_ERR) - uap->port.icount.frame++; - if (r1 & Rx_OVR) - uap->port.icount.overrun++; - r1 &= uap->port.read_status_mask; - if (r1 & BRK_ABRT) - flag = TTY_BREAK; - else if (r1 & PAR_ERR) - flag = TTY_PARITY; - else if (r1 & CRC_ERR) - flag = TTY_FRAME; - } - - if (uap->port.ignore_status_mask == 0xff || - (r1 & uap->port.ignore_status_mask) == 0) { - tty_insert_flip_char(tty, ch, flag); - } - if (r1 & Rx_OVR) - tty_insert_flip_char(tty, 0, TTY_OVERRUN); - next_char: - /* We can get stuck in an infinite loop getting char 0 when the - * line is in a wrong HW state, we break that here. - * When that happens, I disable the receive side of the driver. - * Note that what I've been experiencing is a real irq loop where - * I'm getting flooded regardless of the actual port speed. - * Something stange is going on with the HW - */ - if ((++loops) > 1000) - goto flood; - ch = read_zsreg(uap, R0); - if (!(ch & Rx_CH_AV)) - break; - } - - return tty; - flood: - uap->curregs[R1] &= ~(EXT_INT_ENAB | TxINT_ENAB | RxINT_MASK); - write_zsreg(uap, R1, uap->curregs[R1]); - zssync(uap); - pmz_error("pmz: rx irq flood !\n"); - return tty; -} - -static void pmz_status_handle(struct uart_pmac_port *uap) -{ - unsigned char status; - - status = read_zsreg(uap, R0); - write_zsreg(uap, R0, RES_EXT_INT); - zssync(uap); - - if (ZS_IS_OPEN(uap) && ZS_WANTS_MODEM_STATUS(uap)) { - if (status & SYNC_HUNT) - uap->port.icount.dsr++; - - /* The Zilog just gives us an interrupt when DCD/CTS/etc. change. - * But it does not tell us which bit has changed, we have to keep - * track of this ourselves. - * The CTS input is inverted for some reason. -- paulus - */ - if ((status ^ uap->prev_status) & DCD) - uart_handle_dcd_change(&uap->port, - (status & DCD)); - if ((status ^ uap->prev_status) & CTS) - uart_handle_cts_change(&uap->port, - !(status & CTS)); - - wake_up_interruptible(&uap->port.state->port.delta_msr_wait); - } - - if (status & BRK_ABRT) - uap->flags |= PMACZILOG_FLAG_BREAK; - - uap->prev_status = status; -} - -static void pmz_transmit_chars(struct uart_pmac_port *uap) -{ - struct circ_buf *xmit; - - if (ZS_IS_ASLEEP(uap)) - return; - if (ZS_IS_CONS(uap)) { - unsigned char status = read_zsreg(uap, R0); - - /* TX still busy? Just wait for the next TX done interrupt. - * - * It can occur because of how we do serial console writes. It would - * be nice to transmit console writes just like we normally would for - * a TTY line. (ie. buffered and TX interrupt driven). That is not - * easy because console writes cannot sleep. One solution might be - * to poll on enough port->xmit space becomming free. -DaveM - */ - if (!(status & Tx_BUF_EMP)) - return; - } - - uap->flags &= ~PMACZILOG_FLAG_TX_ACTIVE; - - if (ZS_REGS_HELD(uap)) { - pmz_load_zsregs(uap, uap->curregs); - uap->flags &= ~PMACZILOG_FLAG_REGS_HELD; - } - - if (ZS_TX_STOPPED(uap)) { - uap->flags &= ~PMACZILOG_FLAG_TX_STOPPED; - goto ack_tx_int; - } - - /* Under some circumstances, we see interrupts reported for - * a closed channel. The interrupt mask in R1 is clear, but - * R3 still signals the interrupts and we see them when taking - * an interrupt for the other channel (this could be a qemu - * bug but since the ESCC doc doesn't specify precsiely whether - * R3 interrup status bits are masked by R1 interrupt enable - * bits, better safe than sorry). --BenH. - */ - if (!ZS_IS_OPEN(uap)) - goto ack_tx_int; - - if (uap->port.x_char) { - uap->flags |= PMACZILOG_FLAG_TX_ACTIVE; - write_zsdata(uap, uap->port.x_char); - zssync(uap); - uap->port.icount.tx++; - uap->port.x_char = 0; - return; - } - - if (uap->port.state == NULL) - goto ack_tx_int; - xmit = &uap->port.state->xmit; - if (uart_circ_empty(xmit)) { - uart_write_wakeup(&uap->port); - goto ack_tx_int; - } - if (uart_tx_stopped(&uap->port)) - goto ack_tx_int; - - uap->flags |= PMACZILOG_FLAG_TX_ACTIVE; - write_zsdata(uap, xmit->buf[xmit->tail]); - zssync(uap); - - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - uap->port.icount.tx++; - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&uap->port); - - return; - -ack_tx_int: - write_zsreg(uap, R0, RES_Tx_P); - zssync(uap); -} - -/* Hrm... we register that twice, fixme later.... */ -static irqreturn_t pmz_interrupt(int irq, void *dev_id) -{ - struct uart_pmac_port *uap = dev_id; - struct uart_pmac_port *uap_a; - struct uart_pmac_port *uap_b; - int rc = IRQ_NONE; - struct tty_struct *tty; - u8 r3; - - uap_a = pmz_get_port_A(uap); - uap_b = uap_a->mate; - - spin_lock(&uap_a->port.lock); - r3 = read_zsreg(uap_a, R3); - -#ifdef DEBUG_HARD - pmz_debug("irq, r3: %x\n", r3); -#endif - /* Channel A */ - tty = NULL; - if (r3 & (CHAEXT | CHATxIP | CHARxIP)) { - write_zsreg(uap_a, R0, RES_H_IUS); - zssync(uap_a); - if (r3 & CHAEXT) - pmz_status_handle(uap_a); - if (r3 & CHARxIP) - tty = pmz_receive_chars(uap_a); - if (r3 & CHATxIP) - pmz_transmit_chars(uap_a); - rc = IRQ_HANDLED; - } - spin_unlock(&uap_a->port.lock); - if (tty != NULL) - tty_flip_buffer_push(tty); - - if (uap_b->node == NULL) - goto out; - - spin_lock(&uap_b->port.lock); - tty = NULL; - if (r3 & (CHBEXT | CHBTxIP | CHBRxIP)) { - write_zsreg(uap_b, R0, RES_H_IUS); - zssync(uap_b); - if (r3 & CHBEXT) - pmz_status_handle(uap_b); - if (r3 & CHBRxIP) - tty = pmz_receive_chars(uap_b); - if (r3 & CHBTxIP) - pmz_transmit_chars(uap_b); - rc = IRQ_HANDLED; - } - spin_unlock(&uap_b->port.lock); - if (tty != NULL) - tty_flip_buffer_push(tty); - - out: -#ifdef DEBUG_HARD - pmz_debug("irq done.\n"); -#endif - return rc; -} - -/* - * Peek the status register, lock not held by caller - */ -static inline u8 pmz_peek_status(struct uart_pmac_port *uap) -{ - unsigned long flags; - u8 status; - - spin_lock_irqsave(&uap->port.lock, flags); - status = read_zsreg(uap, R0); - spin_unlock_irqrestore(&uap->port.lock, flags); - - return status; -} - -/* - * Check if transmitter is empty - * The port lock is not held. - */ -static unsigned int pmz_tx_empty(struct uart_port *port) -{ - struct uart_pmac_port *uap = to_pmz(port); - unsigned char status; - - if (ZS_IS_ASLEEP(uap) || uap->node == NULL) - return TIOCSER_TEMT; - - status = pmz_peek_status(to_pmz(port)); - if (status & Tx_BUF_EMP) - return TIOCSER_TEMT; - return 0; -} - -/* - * Set Modem Control (RTS & DTR) bits - * The port lock is held and interrupts are disabled. - * Note: Shall we really filter out RTS on external ports or - * should that be dealt at higher level only ? - */ -static void pmz_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct uart_pmac_port *uap = to_pmz(port); - unsigned char set_bits, clear_bits; - - /* Do nothing for irda for now... */ - if (ZS_IS_IRDA(uap)) - return; - /* We get called during boot with a port not up yet */ - if (ZS_IS_ASLEEP(uap) || - !(ZS_IS_OPEN(uap) || ZS_IS_CONS(uap))) - return; - - set_bits = clear_bits = 0; - - if (ZS_IS_INTMODEM(uap)) { - if (mctrl & TIOCM_RTS) - set_bits |= RTS; - else - clear_bits |= RTS; - } - if (mctrl & TIOCM_DTR) - set_bits |= DTR; - else - clear_bits |= DTR; - - /* NOTE: Not subject to 'transmitter active' rule. */ - uap->curregs[R5] |= set_bits; - uap->curregs[R5] &= ~clear_bits; - if (ZS_IS_ASLEEP(uap)) - return; - write_zsreg(uap, R5, uap->curregs[R5]); - pmz_debug("pmz_set_mctrl: set bits: %x, clear bits: %x -> %x\n", - set_bits, clear_bits, uap->curregs[R5]); - zssync(uap); -} - -/* - * Get Modem Control bits (only the input ones, the core will - * or that with a cached value of the control ones) - * The port lock is held and interrupts are disabled. - */ -static unsigned int pmz_get_mctrl(struct uart_port *port) -{ - struct uart_pmac_port *uap = to_pmz(port); - unsigned char status; - unsigned int ret; - - if (ZS_IS_ASLEEP(uap) || uap->node == NULL) - return 0; - - status = read_zsreg(uap, R0); - - ret = 0; - if (status & DCD) - ret |= TIOCM_CAR; - if (status & SYNC_HUNT) - ret |= TIOCM_DSR; - if (!(status & CTS)) - ret |= TIOCM_CTS; - - return ret; -} - -/* - * Stop TX side. Dealt like sunzilog at next Tx interrupt, - * though for DMA, we will have to do a bit more. - * The port lock is held and interrupts are disabled. - */ -static void pmz_stop_tx(struct uart_port *port) -{ - to_pmz(port)->flags |= PMACZILOG_FLAG_TX_STOPPED; -} - -/* - * Kick the Tx side. - * The port lock is held and interrupts are disabled. - */ -static void pmz_start_tx(struct uart_port *port) -{ - struct uart_pmac_port *uap = to_pmz(port); - unsigned char status; - - pmz_debug("pmz: start_tx()\n"); - - uap->flags |= PMACZILOG_FLAG_TX_ACTIVE; - uap->flags &= ~PMACZILOG_FLAG_TX_STOPPED; - - if (ZS_IS_ASLEEP(uap) || uap->node == NULL) - return; - - status = read_zsreg(uap, R0); - - /* TX busy? Just wait for the TX done interrupt. */ - if (!(status & Tx_BUF_EMP)) - return; - - /* Send the first character to jump-start the TX done - * IRQ sending engine. - */ - if (port->x_char) { - write_zsdata(uap, port->x_char); - zssync(uap); - port->icount.tx++; - port->x_char = 0; - } else { - struct circ_buf *xmit = &port->state->xmit; - - write_zsdata(uap, xmit->buf[xmit->tail]); - zssync(uap); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&uap->port); - } - pmz_debug("pmz: start_tx() done.\n"); -} - -/* - * Stop Rx side, basically disable emitting of - * Rx interrupts on the port. We don't disable the rx - * side of the chip proper though - * The port lock is held. - */ -static void pmz_stop_rx(struct uart_port *port) -{ - struct uart_pmac_port *uap = to_pmz(port); - - if (ZS_IS_ASLEEP(uap) || uap->node == NULL) - return; - - pmz_debug("pmz: stop_rx()()\n"); - - /* Disable all RX interrupts. */ - uap->curregs[R1] &= ~RxINT_MASK; - pmz_maybe_update_regs(uap); - - pmz_debug("pmz: stop_rx() done.\n"); -} - -/* - * Enable modem status change interrupts - * The port lock is held. - */ -static void pmz_enable_ms(struct uart_port *port) -{ - struct uart_pmac_port *uap = to_pmz(port); - unsigned char new_reg; - - if (ZS_IS_IRDA(uap) || uap->node == NULL) - return; - new_reg = uap->curregs[R15] | (DCDIE | SYNCIE | CTSIE); - if (new_reg != uap->curregs[R15]) { - uap->curregs[R15] = new_reg; - - if (ZS_IS_ASLEEP(uap)) - return; - /* NOTE: Not subject to 'transmitter active' rule. */ - write_zsreg(uap, R15, uap->curregs[R15]); - } -} - -/* - * Control break state emission - * The port lock is not held. - */ -static void pmz_break_ctl(struct uart_port *port, int break_state) -{ - struct uart_pmac_port *uap = to_pmz(port); - unsigned char set_bits, clear_bits, new_reg; - unsigned long flags; - - if (uap->node == NULL) - return; - set_bits = clear_bits = 0; - - if (break_state) - set_bits |= SND_BRK; - else - clear_bits |= SND_BRK; - - spin_lock_irqsave(&port->lock, flags); - - new_reg = (uap->curregs[R5] | set_bits) & ~clear_bits; - if (new_reg != uap->curregs[R5]) { - uap->curregs[R5] = new_reg; - - /* NOTE: Not subject to 'transmitter active' rule. */ - if (ZS_IS_ASLEEP(uap)) { - spin_unlock_irqrestore(&port->lock, flags); - return; - } - write_zsreg(uap, R5, uap->curregs[R5]); - } - - spin_unlock_irqrestore(&port->lock, flags); -} - -#ifdef CONFIG_PPC_PMAC - -/* - * Turn power on or off to the SCC and associated stuff - * (port drivers, modem, IR port, etc.) - * Returns the number of milliseconds we should wait before - * trying to use the port. - */ -static int pmz_set_scc_power(struct uart_pmac_port *uap, int state) -{ - int delay = 0; - int rc; - - if (state) { - rc = pmac_call_feature( - PMAC_FTR_SCC_ENABLE, uap->node, uap->port_type, 1); - pmz_debug("port power on result: %d\n", rc); - if (ZS_IS_INTMODEM(uap)) { - rc = pmac_call_feature( - PMAC_FTR_MODEM_ENABLE, uap->node, 0, 1); - delay = 2500; /* wait for 2.5s before using */ - pmz_debug("modem power result: %d\n", rc); - } - } else { - /* TODO: Make that depend on a timer, don't power down - * immediately - */ - if (ZS_IS_INTMODEM(uap)) { - rc = pmac_call_feature( - PMAC_FTR_MODEM_ENABLE, uap->node, 0, 0); - pmz_debug("port power off result: %d\n", rc); - } - pmac_call_feature(PMAC_FTR_SCC_ENABLE, uap->node, uap->port_type, 0); - } - return delay; -} - -#else - -static int pmz_set_scc_power(struct uart_pmac_port *uap, int state) -{ - return 0; -} - -#endif /* !CONFIG_PPC_PMAC */ - -/* - * FixZeroBug....Works around a bug in the SCC receving channel. - * Inspired from Darwin code, 15 Sept. 2000 -DanM - * - * The following sequence prevents a problem that is seen with O'Hare ASICs - * (most versions -- also with some Heathrow and Hydra ASICs) where a zero - * at the input to the receiver becomes 'stuck' and locks up the receiver. - * This problem can occur as a result of a zero bit at the receiver input - * coincident with any of the following events: - * - * The SCC is initialized (hardware or software). - * A framing error is detected. - * The clocking option changes from synchronous or X1 asynchronous - * clocking to X16, X32, or X64 asynchronous clocking. - * The decoding mode is changed among NRZ, NRZI, FM0, or FM1. - * - * This workaround attempts to recover from the lockup condition by placing - * the SCC in synchronous loopback mode with a fast clock before programming - * any of the asynchronous modes. - */ -static void pmz_fix_zero_bug_scc(struct uart_pmac_port *uap) -{ - write_zsreg(uap, 9, ZS_IS_CHANNEL_A(uap) ? CHRA : CHRB); - zssync(uap); - udelay(10); - write_zsreg(uap, 9, (ZS_IS_CHANNEL_A(uap) ? CHRA : CHRB) | NV); - zssync(uap); - - write_zsreg(uap, 4, X1CLK | MONSYNC); - write_zsreg(uap, 3, Rx8); - write_zsreg(uap, 5, Tx8 | RTS); - write_zsreg(uap, 9, NV); /* Didn't we already do this? */ - write_zsreg(uap, 11, RCBR | TCBR); - write_zsreg(uap, 12, 0); - write_zsreg(uap, 13, 0); - write_zsreg(uap, 14, (LOOPBAK | BRSRC)); - write_zsreg(uap, 14, (LOOPBAK | BRSRC | BRENAB)); - write_zsreg(uap, 3, Rx8 | RxENABLE); - write_zsreg(uap, 0, RES_EXT_INT); - write_zsreg(uap, 0, RES_EXT_INT); - write_zsreg(uap, 0, RES_EXT_INT); /* to kill some time */ - - /* The channel should be OK now, but it is probably receiving - * loopback garbage. - * Switch to asynchronous mode, disable the receiver, - * and discard everything in the receive buffer. - */ - write_zsreg(uap, 9, NV); - write_zsreg(uap, 4, X16CLK | SB_MASK); - write_zsreg(uap, 3, Rx8); - - while (read_zsreg(uap, 0) & Rx_CH_AV) { - (void)read_zsreg(uap, 8); - write_zsreg(uap, 0, RES_EXT_INT); - write_zsreg(uap, 0, ERR_RES); - } -} - -/* - * Real startup routine, powers up the hardware and sets up - * the SCC. Returns a delay in ms where you need to wait before - * actually using the port, this is typically the internal modem - * powerup delay. This routine expect the lock to be taken. - */ -static int __pmz_startup(struct uart_pmac_port *uap) -{ - int pwr_delay = 0; - - memset(&uap->curregs, 0, sizeof(uap->curregs)); - - /* Power up the SCC & underlying hardware (modem/irda) */ - pwr_delay = pmz_set_scc_power(uap, 1); - - /* Nice buggy HW ... */ - pmz_fix_zero_bug_scc(uap); - - /* Reset the channel */ - uap->curregs[R9] = 0; - write_zsreg(uap, 9, ZS_IS_CHANNEL_A(uap) ? CHRA : CHRB); - zssync(uap); - udelay(10); - write_zsreg(uap, 9, 0); - zssync(uap); - - /* Clear the interrupt registers */ - write_zsreg(uap, R1, 0); - write_zsreg(uap, R0, ERR_RES); - write_zsreg(uap, R0, ERR_RES); - write_zsreg(uap, R0, RES_H_IUS); - write_zsreg(uap, R0, RES_H_IUS); - - /* Setup some valid baud rate */ - uap->curregs[R4] = X16CLK | SB1; - uap->curregs[R3] = Rx8; - uap->curregs[R5] = Tx8 | RTS; - if (!ZS_IS_IRDA(uap)) - uap->curregs[R5] |= DTR; - uap->curregs[R12] = 0; - uap->curregs[R13] = 0; - uap->curregs[R14] = BRENAB; - - /* Clear handshaking, enable BREAK interrupts */ - uap->curregs[R15] = BRKIE; - - /* Master interrupt enable */ - uap->curregs[R9] |= NV | MIE; - - pmz_load_zsregs(uap, uap->curregs); - - /* Enable receiver and transmitter. */ - write_zsreg(uap, R3, uap->curregs[R3] |= RxENABLE); - write_zsreg(uap, R5, uap->curregs[R5] |= TxENABLE); - - /* Remember status for DCD/CTS changes */ - uap->prev_status = read_zsreg(uap, R0); - - return pwr_delay; -} - -static void pmz_irda_reset(struct uart_pmac_port *uap) -{ - uap->curregs[R5] |= DTR; - write_zsreg(uap, R5, uap->curregs[R5]); - zssync(uap); - mdelay(110); - uap->curregs[R5] &= ~DTR; - write_zsreg(uap, R5, uap->curregs[R5]); - zssync(uap); - mdelay(10); -} - -/* - * This is the "normal" startup routine, using the above one - * wrapped with the lock and doing a schedule delay - */ -static int pmz_startup(struct uart_port *port) -{ - struct uart_pmac_port *uap = to_pmz(port); - unsigned long flags; - int pwr_delay = 0; - - pmz_debug("pmz: startup()\n"); - - if (ZS_IS_ASLEEP(uap)) - return -EAGAIN; - if (uap->node == NULL) - return -ENODEV; - - mutex_lock(&pmz_irq_mutex); - - uap->flags |= PMACZILOG_FLAG_IS_OPEN; - - /* A console is never powered down. Else, power up and - * initialize the chip - */ - if (!ZS_IS_CONS(uap)) { - spin_lock_irqsave(&port->lock, flags); - pwr_delay = __pmz_startup(uap); - spin_unlock_irqrestore(&port->lock, flags); - } - - pmz_get_port_A(uap)->flags |= PMACZILOG_FLAG_IS_IRQ_ON; - if (request_irq(uap->port.irq, pmz_interrupt, IRQF_SHARED, - "SCC", uap)) { - pmz_error("Unable to register zs interrupt handler.\n"); - pmz_set_scc_power(uap, 0); - mutex_unlock(&pmz_irq_mutex); - return -ENXIO; - } - - mutex_unlock(&pmz_irq_mutex); - - /* Right now, we deal with delay by blocking here, I'll be - * smarter later on - */ - if (pwr_delay != 0) { - pmz_debug("pmz: delaying %d ms\n", pwr_delay); - msleep(pwr_delay); - } - - /* IrDA reset is done now */ - if (ZS_IS_IRDA(uap)) - pmz_irda_reset(uap); - - /* Enable interrupts emission from the chip */ - spin_lock_irqsave(&port->lock, flags); - uap->curregs[R1] |= INT_ALL_Rx | TxINT_ENAB; - if (!ZS_IS_EXTCLK(uap)) - uap->curregs[R1] |= EXT_INT_ENAB; - write_zsreg(uap, R1, uap->curregs[R1]); - spin_unlock_irqrestore(&port->lock, flags); - - pmz_debug("pmz: startup() done.\n"); - - return 0; -} - -static void pmz_shutdown(struct uart_port *port) -{ - struct uart_pmac_port *uap = to_pmz(port); - unsigned long flags; - - pmz_debug("pmz: shutdown()\n"); - - if (uap->node == NULL) - return; - - mutex_lock(&pmz_irq_mutex); - - /* Release interrupt handler */ - free_irq(uap->port.irq, uap); - - spin_lock_irqsave(&port->lock, flags); - - uap->flags &= ~PMACZILOG_FLAG_IS_OPEN; - - if (!ZS_IS_OPEN(uap->mate)) - pmz_get_port_A(uap)->flags &= ~PMACZILOG_FLAG_IS_IRQ_ON; - - /* Disable interrupts */ - if (!ZS_IS_ASLEEP(uap)) { - uap->curregs[R1] &= ~(EXT_INT_ENAB | TxINT_ENAB | RxINT_MASK); - write_zsreg(uap, R1, uap->curregs[R1]); - zssync(uap); - } - - if (ZS_IS_CONS(uap) || ZS_IS_ASLEEP(uap)) { - spin_unlock_irqrestore(&port->lock, flags); - mutex_unlock(&pmz_irq_mutex); - return; - } - - /* Disable receiver and transmitter. */ - uap->curregs[R3] &= ~RxENABLE; - uap->curregs[R5] &= ~TxENABLE; - - /* Disable all interrupts and BRK assertion. */ - uap->curregs[R5] &= ~SND_BRK; - pmz_maybe_update_regs(uap); - - /* Shut the chip down */ - pmz_set_scc_power(uap, 0); - - spin_unlock_irqrestore(&port->lock, flags); - - mutex_unlock(&pmz_irq_mutex); - - pmz_debug("pmz: shutdown() done.\n"); -} - -/* Shared by TTY driver and serial console setup. The port lock is held - * and local interrupts are disabled. - */ -static void pmz_convert_to_zs(struct uart_pmac_port *uap, unsigned int cflag, - unsigned int iflag, unsigned long baud) -{ - int brg; - - /* Switch to external clocking for IrDA high clock rates. That - * code could be re-used for Midi interfaces with different - * multipliers - */ - if (baud >= 115200 && ZS_IS_IRDA(uap)) { - uap->curregs[R4] = X1CLK; - uap->curregs[R11] = RCTRxCP | TCTRxCP; - uap->curregs[R14] = 0; /* BRG off */ - uap->curregs[R12] = 0; - uap->curregs[R13] = 0; - uap->flags |= PMACZILOG_FLAG_IS_EXTCLK; - } else { - switch (baud) { - case ZS_CLOCK/16: /* 230400 */ - uap->curregs[R4] = X16CLK; - uap->curregs[R11] = 0; - uap->curregs[R14] = 0; - break; - case ZS_CLOCK/32: /* 115200 */ - uap->curregs[R4] = X32CLK; - uap->curregs[R11] = 0; - uap->curregs[R14] = 0; - break; - default: - uap->curregs[R4] = X16CLK; - uap->curregs[R11] = TCBR | RCBR; - brg = BPS_TO_BRG(baud, ZS_CLOCK / 16); - uap->curregs[R12] = (brg & 255); - uap->curregs[R13] = ((brg >> 8) & 255); - uap->curregs[R14] = BRENAB; - } - uap->flags &= ~PMACZILOG_FLAG_IS_EXTCLK; - } - - /* Character size, stop bits, and parity. */ - uap->curregs[3] &= ~RxN_MASK; - uap->curregs[5] &= ~TxN_MASK; - - switch (cflag & CSIZE) { - case CS5: - uap->curregs[3] |= Rx5; - uap->curregs[5] |= Tx5; - uap->parity_mask = 0x1f; - break; - case CS6: - uap->curregs[3] |= Rx6; - uap->curregs[5] |= Tx6; - uap->parity_mask = 0x3f; - break; - case CS7: - uap->curregs[3] |= Rx7; - uap->curregs[5] |= Tx7; - uap->parity_mask = 0x7f; - break; - case CS8: - default: - uap->curregs[3] |= Rx8; - uap->curregs[5] |= Tx8; - uap->parity_mask = 0xff; - break; - }; - uap->curregs[4] &= ~(SB_MASK); - if (cflag & CSTOPB) - uap->curregs[4] |= SB2; - else - uap->curregs[4] |= SB1; - if (cflag & PARENB) - uap->curregs[4] |= PAR_ENAB; - else - uap->curregs[4] &= ~PAR_ENAB; - if (!(cflag & PARODD)) - uap->curregs[4] |= PAR_EVEN; - else - uap->curregs[4] &= ~PAR_EVEN; - - uap->port.read_status_mask = Rx_OVR; - if (iflag & INPCK) - uap->port.read_status_mask |= CRC_ERR | PAR_ERR; - if (iflag & (BRKINT | PARMRK)) - uap->port.read_status_mask |= BRK_ABRT; - - uap->port.ignore_status_mask = 0; - if (iflag & IGNPAR) - uap->port.ignore_status_mask |= CRC_ERR | PAR_ERR; - if (iflag & IGNBRK) { - uap->port.ignore_status_mask |= BRK_ABRT; - if (iflag & IGNPAR) - uap->port.ignore_status_mask |= Rx_OVR; - } - - if ((cflag & CREAD) == 0) - uap->port.ignore_status_mask = 0xff; -} - - -/* - * Set the irda codec on the imac to the specified baud rate. - */ -static void pmz_irda_setup(struct uart_pmac_port *uap, unsigned long *baud) -{ - u8 cmdbyte; - int t, version; - - switch (*baud) { - /* SIR modes */ - case 2400: - cmdbyte = 0x53; - break; - case 4800: - cmdbyte = 0x52; - break; - case 9600: - cmdbyte = 0x51; - break; - case 19200: - cmdbyte = 0x50; - break; - case 38400: - cmdbyte = 0x4f; - break; - case 57600: - cmdbyte = 0x4e; - break; - case 115200: - cmdbyte = 0x4d; - break; - /* The FIR modes aren't really supported at this point, how - * do we select the speed ? via the FCR on KeyLargo ? - */ - case 1152000: - cmdbyte = 0; - break; - case 4000000: - cmdbyte = 0; - break; - default: /* 9600 */ - cmdbyte = 0x51; - *baud = 9600; - break; - } - - /* Wait for transmitter to drain */ - t = 10000; - while ((read_zsreg(uap, R0) & Tx_BUF_EMP) == 0 - || (read_zsreg(uap, R1) & ALL_SNT) == 0) { - if (--t <= 0) { - pmz_error("transmitter didn't drain\n"); - return; - } - udelay(10); - } - - /* Drain the receiver too */ - t = 100; - (void)read_zsdata(uap); - (void)read_zsdata(uap); - (void)read_zsdata(uap); - mdelay(10); - while (read_zsreg(uap, R0) & Rx_CH_AV) { - read_zsdata(uap); - mdelay(10); - if (--t <= 0) { - pmz_error("receiver didn't drain\n"); - return; - } - } - - /* Switch to command mode */ - uap->curregs[R5] |= DTR; - write_zsreg(uap, R5, uap->curregs[R5]); - zssync(uap); - mdelay(1); - - /* Switch SCC to 19200 */ - pmz_convert_to_zs(uap, CS8, 0, 19200); - pmz_load_zsregs(uap, uap->curregs); - mdelay(1); - - /* Write get_version command byte */ - write_zsdata(uap, 1); - t = 5000; - while ((read_zsreg(uap, R0) & Rx_CH_AV) == 0) { - if (--t <= 0) { - pmz_error("irda_setup timed out on get_version byte\n"); - goto out; - } - udelay(10); - } - version = read_zsdata(uap); - - if (version < 4) { - pmz_info("IrDA: dongle version %d not supported\n", version); - goto out; - } - - /* Send speed mode */ - write_zsdata(uap, cmdbyte); - t = 5000; - while ((read_zsreg(uap, R0) & Rx_CH_AV) == 0) { - if (--t <= 0) { - pmz_error("irda_setup timed out on speed mode byte\n"); - goto out; - } - udelay(10); - } - t = read_zsdata(uap); - if (t != cmdbyte) - pmz_error("irda_setup speed mode byte = %x (%x)\n", t, cmdbyte); - - pmz_info("IrDA setup for %ld bps, dongle version: %d\n", - *baud, version); - - (void)read_zsdata(uap); - (void)read_zsdata(uap); - (void)read_zsdata(uap); - - out: - /* Switch back to data mode */ - uap->curregs[R5] &= ~DTR; - write_zsreg(uap, R5, uap->curregs[R5]); - zssync(uap); - - (void)read_zsdata(uap); - (void)read_zsdata(uap); - (void)read_zsdata(uap); -} - - -static void __pmz_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct uart_pmac_port *uap = to_pmz(port); - unsigned long baud; - - pmz_debug("pmz: set_termios()\n"); - - if (ZS_IS_ASLEEP(uap)) - return; - - memcpy(&uap->termios_cache, termios, sizeof(struct ktermios)); - - /* XXX Check which revs of machines actually allow 1 and 4Mb speeds - * on the IR dongle. Note that the IRTTY driver currently doesn't know - * about the FIR mode and high speed modes. So these are unused. For - * implementing proper support for these, we should probably add some - * DMA as well, at least on the Rx side, which isn't a simple thing - * at this point. - */ - if (ZS_IS_IRDA(uap)) { - /* Calc baud rate */ - baud = uart_get_baud_rate(port, termios, old, 1200, 4000000); - pmz_debug("pmz: switch IRDA to %ld bauds\n", baud); - /* Cet the irda codec to the right rate */ - pmz_irda_setup(uap, &baud); - /* Set final baud rate */ - pmz_convert_to_zs(uap, termios->c_cflag, termios->c_iflag, baud); - pmz_load_zsregs(uap, uap->curregs); - zssync(uap); - } else { - baud = uart_get_baud_rate(port, termios, old, 1200, 230400); - pmz_convert_to_zs(uap, termios->c_cflag, termios->c_iflag, baud); - /* Make sure modem status interrupts are correctly configured */ - if (UART_ENABLE_MS(&uap->port, termios->c_cflag)) { - uap->curregs[R15] |= DCDIE | SYNCIE | CTSIE; - uap->flags |= PMACZILOG_FLAG_MODEM_STATUS; - } else { - uap->curregs[R15] &= ~(DCDIE | SYNCIE | CTSIE); - uap->flags &= ~PMACZILOG_FLAG_MODEM_STATUS; - } - - /* Load registers to the chip */ - pmz_maybe_update_regs(uap); - } - uart_update_timeout(port, termios->c_cflag, baud); - - pmz_debug("pmz: set_termios() done.\n"); -} - -/* The port lock is not held. */ -static void pmz_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct uart_pmac_port *uap = to_pmz(port); - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - - /* Disable IRQs on the port */ - uap->curregs[R1] &= ~(EXT_INT_ENAB | TxINT_ENAB | RxINT_MASK); - write_zsreg(uap, R1, uap->curregs[R1]); - - /* Setup new port configuration */ - __pmz_set_termios(port, termios, old); - - /* Re-enable IRQs on the port */ - if (ZS_IS_OPEN(uap)) { - uap->curregs[R1] |= INT_ALL_Rx | TxINT_ENAB; - if (!ZS_IS_EXTCLK(uap)) - uap->curregs[R1] |= EXT_INT_ENAB; - write_zsreg(uap, R1, uap->curregs[R1]); - } - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *pmz_type(struct uart_port *port) -{ - struct uart_pmac_port *uap = to_pmz(port); - - if (ZS_IS_IRDA(uap)) - return "Z85c30 ESCC - Infrared port"; - else if (ZS_IS_INTMODEM(uap)) - return "Z85c30 ESCC - Internal modem"; - return "Z85c30 ESCC - Serial port"; -} - -/* We do not request/release mappings of the registers here, this - * happens at early serial probe time. - */ -static void pmz_release_port(struct uart_port *port) -{ -} - -static int pmz_request_port(struct uart_port *port) -{ - return 0; -} - -/* These do not need to do anything interesting either. */ -static void pmz_config_port(struct uart_port *port, int flags) -{ -} - -/* We do not support letting the user mess with the divisor, IRQ, etc. */ -static int pmz_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - return -EINVAL; -} - -#ifdef CONFIG_CONSOLE_POLL - -static int pmz_poll_get_char(struct uart_port *port) -{ - struct uart_pmac_port *uap = (struct uart_pmac_port *)port; - - while ((read_zsreg(uap, R0) & Rx_CH_AV) == 0) - udelay(5); - return read_zsdata(uap); -} - -static void pmz_poll_put_char(struct uart_port *port, unsigned char c) -{ - struct uart_pmac_port *uap = (struct uart_pmac_port *)port; - - /* Wait for the transmit buffer to empty. */ - while ((read_zsreg(uap, R0) & Tx_BUF_EMP) == 0) - udelay(5); - write_zsdata(uap, c); -} - -#endif /* CONFIG_CONSOLE_POLL */ - -static struct uart_ops pmz_pops = { - .tx_empty = pmz_tx_empty, - .set_mctrl = pmz_set_mctrl, - .get_mctrl = pmz_get_mctrl, - .stop_tx = pmz_stop_tx, - .start_tx = pmz_start_tx, - .stop_rx = pmz_stop_rx, - .enable_ms = pmz_enable_ms, - .break_ctl = pmz_break_ctl, - .startup = pmz_startup, - .shutdown = pmz_shutdown, - .set_termios = pmz_set_termios, - .type = pmz_type, - .release_port = pmz_release_port, - .request_port = pmz_request_port, - .config_port = pmz_config_port, - .verify_port = pmz_verify_port, -#ifdef CONFIG_CONSOLE_POLL - .poll_get_char = pmz_poll_get_char, - .poll_put_char = pmz_poll_put_char, -#endif -}; - -#ifdef CONFIG_PPC_PMAC - -/* - * Setup one port structure after probing, HW is down at this point, - * Unlike sunzilog, we don't need to pre-init the spinlock as we don't - * register our console before uart_add_one_port() is called - */ -static int __init pmz_init_port(struct uart_pmac_port *uap) -{ - struct device_node *np = uap->node; - const char *conn; - const struct slot_names_prop { - int count; - char name[1]; - } *slots; - int len; - struct resource r_ports, r_rxdma, r_txdma; - - /* - * Request & map chip registers - */ - if (of_address_to_resource(np, 0, &r_ports)) - return -ENODEV; - uap->port.mapbase = r_ports.start; - uap->port.membase = ioremap(uap->port.mapbase, 0x1000); - - uap->control_reg = uap->port.membase; - uap->data_reg = uap->control_reg + 0x10; - - /* - * Request & map DBDMA registers - */ -#ifdef HAS_DBDMA - if (of_address_to_resource(np, 1, &r_txdma) == 0 && - of_address_to_resource(np, 2, &r_rxdma) == 0) - uap->flags |= PMACZILOG_FLAG_HAS_DMA; -#else - memset(&r_txdma, 0, sizeof(struct resource)); - memset(&r_rxdma, 0, sizeof(struct resource)); -#endif - if (ZS_HAS_DMA(uap)) { - uap->tx_dma_regs = ioremap(r_txdma.start, 0x100); - if (uap->tx_dma_regs == NULL) { - uap->flags &= ~PMACZILOG_FLAG_HAS_DMA; - goto no_dma; - } - uap->rx_dma_regs = ioremap(r_rxdma.start, 0x100); - if (uap->rx_dma_regs == NULL) { - iounmap(uap->tx_dma_regs); - uap->tx_dma_regs = NULL; - uap->flags &= ~PMACZILOG_FLAG_HAS_DMA; - goto no_dma; - } - uap->tx_dma_irq = irq_of_parse_and_map(np, 1); - uap->rx_dma_irq = irq_of_parse_and_map(np, 2); - } -no_dma: - - /* - * Detect port type - */ - if (of_device_is_compatible(np, "cobalt")) - uap->flags |= PMACZILOG_FLAG_IS_INTMODEM; - conn = of_get_property(np, "AAPL,connector", &len); - if (conn && (strcmp(conn, "infrared") == 0)) - uap->flags |= PMACZILOG_FLAG_IS_IRDA; - uap->port_type = PMAC_SCC_ASYNC; - /* 1999 Powerbook G3 has slot-names property instead */ - slots = of_get_property(np, "slot-names", &len); - if (slots && slots->count > 0) { - if (strcmp(slots->name, "IrDA") == 0) - uap->flags |= PMACZILOG_FLAG_IS_IRDA; - else if (strcmp(slots->name, "Modem") == 0) - uap->flags |= PMACZILOG_FLAG_IS_INTMODEM; - } - if (ZS_IS_IRDA(uap)) - uap->port_type = PMAC_SCC_IRDA; - if (ZS_IS_INTMODEM(uap)) { - struct device_node* i2c_modem = - of_find_node_by_name(NULL, "i2c-modem"); - if (i2c_modem) { - const char* mid = - of_get_property(i2c_modem, "modem-id", NULL); - if (mid) switch(*mid) { - case 0x04 : - case 0x05 : - case 0x07 : - case 0x08 : - case 0x0b : - case 0x0c : - uap->port_type = PMAC_SCC_I2S1; - } - printk(KERN_INFO "pmac_zilog: i2c-modem detected, id: %d\n", - mid ? (*mid) : 0); - of_node_put(i2c_modem); - } else { - printk(KERN_INFO "pmac_zilog: serial modem detected\n"); - } - } - - /* - * Init remaining bits of "port" structure - */ - uap->port.iotype = UPIO_MEM; - uap->port.irq = irq_of_parse_and_map(np, 0); - uap->port.uartclk = ZS_CLOCK; - uap->port.fifosize = 1; - uap->port.ops = &pmz_pops; - uap->port.type = PORT_PMAC_ZILOG; - uap->port.flags = 0; - - /* - * Fixup for the port on Gatwick for which the device-tree has - * missing interrupts. Normally, the macio_dev would contain - * fixed up interrupt info, but we use the device-tree directly - * here due to early probing so we need the fixup too. - */ - if (uap->port.irq == NO_IRQ && - np->parent && np->parent->parent && - of_device_is_compatible(np->parent->parent, "gatwick")) { - /* IRQs on gatwick are offset by 64 */ - uap->port.irq = irq_create_mapping(NULL, 64 + 15); - uap->tx_dma_irq = irq_create_mapping(NULL, 64 + 4); - uap->rx_dma_irq = irq_create_mapping(NULL, 64 + 5); - } - - /* Setup some valid baud rate information in the register - * shadows so we don't write crap there before baud rate is - * first initialized. - */ - pmz_convert_to_zs(uap, CS8, 0, 9600); - - return 0; -} - -/* - * Get rid of a port on module removal - */ -static void pmz_dispose_port(struct uart_pmac_port *uap) -{ - struct device_node *np; - - np = uap->node; - iounmap(uap->rx_dma_regs); - iounmap(uap->tx_dma_regs); - iounmap(uap->control_reg); - uap->node = NULL; - of_node_put(np); - memset(uap, 0, sizeof(struct uart_pmac_port)); -} - -/* - * Called upon match with an escc node in the device-tree. - */ -static int pmz_attach(struct macio_dev *mdev, const struct of_device_id *match) -{ - int i; - - /* Iterate the pmz_ports array to find a matching entry - */ - for (i = 0; i < MAX_ZS_PORTS; i++) - if (pmz_ports[i].node == mdev->ofdev.dev.of_node) { - struct uart_pmac_port *uap = &pmz_ports[i]; - - uap->dev = mdev; - dev_set_drvdata(&mdev->ofdev.dev, uap); - if (macio_request_resources(uap->dev, "pmac_zilog")) - printk(KERN_WARNING "%s: Failed to request resource" - ", port still active\n", - uap->node->name); - else - uap->flags |= PMACZILOG_FLAG_RSRC_REQUESTED; - return 0; - } - return -ENODEV; -} - -/* - * That one should not be called, macio isn't really a hotswap device, - * we don't expect one of those serial ports to go away... - */ -static int pmz_detach(struct macio_dev *mdev) -{ - struct uart_pmac_port *uap = dev_get_drvdata(&mdev->ofdev.dev); - - if (!uap) - return -ENODEV; - - if (uap->flags & PMACZILOG_FLAG_RSRC_REQUESTED) { - macio_release_resources(uap->dev); - uap->flags &= ~PMACZILOG_FLAG_RSRC_REQUESTED; - } - dev_set_drvdata(&mdev->ofdev.dev, NULL); - uap->dev = NULL; - - return 0; -} - - -static int pmz_suspend(struct macio_dev *mdev, pm_message_t pm_state) -{ - struct uart_pmac_port *uap = dev_get_drvdata(&mdev->ofdev.dev); - struct uart_state *state; - unsigned long flags; - - if (uap == NULL) { - printk("HRM... pmz_suspend with NULL uap\n"); - return 0; - } - - if (pm_state.event == mdev->ofdev.dev.power.power_state.event) - return 0; - - pmz_debug("suspend, switching to state %d\n", pm_state.event); - - state = pmz_uart_reg.state + uap->port.line; - - mutex_lock(&pmz_irq_mutex); - mutex_lock(&state->port.mutex); - - spin_lock_irqsave(&uap->port.lock, flags); - - if (ZS_IS_OPEN(uap) || ZS_IS_CONS(uap)) { - /* Disable receiver and transmitter. */ - uap->curregs[R3] &= ~RxENABLE; - uap->curregs[R5] &= ~TxENABLE; - - /* Disable all interrupts and BRK assertion. */ - uap->curregs[R1] &= ~(EXT_INT_ENAB | TxINT_ENAB | RxINT_MASK); - uap->curregs[R5] &= ~SND_BRK; - pmz_load_zsregs(uap, uap->curregs); - uap->flags |= PMACZILOG_FLAG_IS_ASLEEP; - mb(); - } - - spin_unlock_irqrestore(&uap->port.lock, flags); - - if (ZS_IS_OPEN(uap) || ZS_IS_OPEN(uap->mate)) - if (ZS_IS_ASLEEP(uap->mate) && ZS_IS_IRQ_ON(pmz_get_port_A(uap))) { - pmz_get_port_A(uap)->flags &= ~PMACZILOG_FLAG_IS_IRQ_ON; - disable_irq(uap->port.irq); - } - - if (ZS_IS_CONS(uap)) - uap->port.cons->flags &= ~CON_ENABLED; - - /* Shut the chip down */ - pmz_set_scc_power(uap, 0); - - mutex_unlock(&state->port.mutex); - mutex_unlock(&pmz_irq_mutex); - - pmz_debug("suspend, switching complete\n"); - - mdev->ofdev.dev.power.power_state = pm_state; - - return 0; -} - - -static int pmz_resume(struct macio_dev *mdev) -{ - struct uart_pmac_port *uap = dev_get_drvdata(&mdev->ofdev.dev); - struct uart_state *state; - unsigned long flags; - int pwr_delay = 0; - - if (uap == NULL) - return 0; - - if (mdev->ofdev.dev.power.power_state.event == PM_EVENT_ON) - return 0; - - pmz_debug("resume, switching to state 0\n"); - - state = pmz_uart_reg.state + uap->port.line; - - mutex_lock(&pmz_irq_mutex); - mutex_lock(&state->port.mutex); - - spin_lock_irqsave(&uap->port.lock, flags); - if (!ZS_IS_OPEN(uap) && !ZS_IS_CONS(uap)) { - spin_unlock_irqrestore(&uap->port.lock, flags); - goto bail; - } - pwr_delay = __pmz_startup(uap); - - /* Take care of config that may have changed while asleep */ - __pmz_set_termios(&uap->port, &uap->termios_cache, NULL); - - if (ZS_IS_OPEN(uap)) { - /* Enable interrupts */ - uap->curregs[R1] |= INT_ALL_Rx | TxINT_ENAB; - if (!ZS_IS_EXTCLK(uap)) - uap->curregs[R1] |= EXT_INT_ENAB; - write_zsreg(uap, R1, uap->curregs[R1]); - } - - spin_unlock_irqrestore(&uap->port.lock, flags); - - if (ZS_IS_CONS(uap)) - uap->port.cons->flags |= CON_ENABLED; - - /* Re-enable IRQ on the controller */ - if (ZS_IS_OPEN(uap) && !ZS_IS_IRQ_ON(pmz_get_port_A(uap))) { - pmz_get_port_A(uap)->flags |= PMACZILOG_FLAG_IS_IRQ_ON; - enable_irq(uap->port.irq); - } - - bail: - mutex_unlock(&state->port.mutex); - mutex_unlock(&pmz_irq_mutex); - - /* Right now, we deal with delay by blocking here, I'll be - * smarter later on - */ - if (pwr_delay != 0) { - pmz_debug("pmz: delaying %d ms\n", pwr_delay); - msleep(pwr_delay); - } - - pmz_debug("resume, switching complete\n"); - - mdev->ofdev.dev.power.power_state.event = PM_EVENT_ON; - - return 0; -} - -/* - * Probe all ports in the system and build the ports array, we register - * with the serial layer at this point, the macio-type probing is only - * used later to "attach" to the sysfs tree so we get power management - * events - */ -static int __init pmz_probe(void) -{ - struct device_node *node_p, *node_a, *node_b, *np; - int count = 0; - int rc; - - /* - * Find all escc chips in the system - */ - node_p = of_find_node_by_name(NULL, "escc"); - while (node_p) { - /* - * First get channel A/B node pointers - * - * TODO: Add routines with proper locking to do that... - */ - node_a = node_b = NULL; - for (np = NULL; (np = of_get_next_child(node_p, np)) != NULL;) { - if (strncmp(np->name, "ch-a", 4) == 0) - node_a = of_node_get(np); - else if (strncmp(np->name, "ch-b", 4) == 0) - node_b = of_node_get(np); - } - if (!node_a && !node_b) { - of_node_put(node_a); - of_node_put(node_b); - printk(KERN_ERR "pmac_zilog: missing node %c for escc %s\n", - (!node_a) ? 'a' : 'b', node_p->full_name); - goto next; - } - - /* - * Fill basic fields in the port structures - */ - pmz_ports[count].mate = &pmz_ports[count+1]; - pmz_ports[count+1].mate = &pmz_ports[count]; - pmz_ports[count].flags = PMACZILOG_FLAG_IS_CHANNEL_A; - pmz_ports[count].node = node_a; - pmz_ports[count+1].node = node_b; - pmz_ports[count].port.line = count; - pmz_ports[count+1].port.line = count+1; - - /* - * Setup the ports for real - */ - rc = pmz_init_port(&pmz_ports[count]); - if (rc == 0 && node_b != NULL) - rc = pmz_init_port(&pmz_ports[count+1]); - if (rc != 0) { - of_node_put(node_a); - of_node_put(node_b); - memset(&pmz_ports[count], 0, sizeof(struct uart_pmac_port)); - memset(&pmz_ports[count+1], 0, sizeof(struct uart_pmac_port)); - goto next; - } - count += 2; -next: - node_p = of_find_node_by_name(node_p, "escc"); - } - pmz_ports_count = count; - - return 0; -} - -#else - -extern struct platform_device scc_a_pdev, scc_b_pdev; - -static int __init pmz_init_port(struct uart_pmac_port *uap) -{ - struct resource *r_ports; - int irq; - - r_ports = platform_get_resource(uap->node, IORESOURCE_MEM, 0); - irq = platform_get_irq(uap->node, 0); - if (!r_ports || !irq) - return -ENODEV; - - uap->port.mapbase = r_ports->start; - uap->port.membase = (unsigned char __iomem *) r_ports->start; - uap->port.iotype = UPIO_MEM; - uap->port.irq = irq; - uap->port.uartclk = ZS_CLOCK; - uap->port.fifosize = 1; - uap->port.ops = &pmz_pops; - uap->port.type = PORT_PMAC_ZILOG; - uap->port.flags = 0; - - uap->control_reg = uap->port.membase; - uap->data_reg = uap->control_reg + 4; - uap->port_type = 0; - - pmz_convert_to_zs(uap, CS8, 0, 9600); - - return 0; -} - -static int __init pmz_probe(void) -{ - int err; - - pmz_ports_count = 0; - - pmz_ports[0].mate = &pmz_ports[1]; - pmz_ports[0].port.line = 0; - pmz_ports[0].flags = PMACZILOG_FLAG_IS_CHANNEL_A; - pmz_ports[0].node = &scc_a_pdev; - err = pmz_init_port(&pmz_ports[0]); - if (err) - return err; - pmz_ports_count++; - - pmz_ports[1].mate = &pmz_ports[0]; - pmz_ports[1].port.line = 1; - pmz_ports[1].flags = 0; - pmz_ports[1].node = &scc_b_pdev; - err = pmz_init_port(&pmz_ports[1]); - if (err) - return err; - pmz_ports_count++; - - return 0; -} - -static void pmz_dispose_port(struct uart_pmac_port *uap) -{ - memset(uap, 0, sizeof(struct uart_pmac_port)); -} - -static int __init pmz_attach(struct platform_device *pdev) -{ - int i; - - for (i = 0; i < pmz_ports_count; i++) - if (pmz_ports[i].node == pdev) - return 0; - return -ENODEV; -} - -static int __exit pmz_detach(struct platform_device *pdev) -{ - return 0; -} - -#endif /* !CONFIG_PPC_PMAC */ - -#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE - -static void pmz_console_write(struct console *con, const char *s, unsigned int count); -static int __init pmz_console_setup(struct console *co, char *options); - -static struct console pmz_console = { - .name = PMACZILOG_NAME, - .write = pmz_console_write, - .device = uart_console_device, - .setup = pmz_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &pmz_uart_reg, -}; - -#define PMACZILOG_CONSOLE &pmz_console -#else /* CONFIG_SERIAL_PMACZILOG_CONSOLE */ -#define PMACZILOG_CONSOLE (NULL) -#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */ - -/* - * Register the driver, console driver and ports with the serial - * core - */ -static int __init pmz_register(void) -{ - int i, rc; - - pmz_uart_reg.nr = pmz_ports_count; - pmz_uart_reg.cons = PMACZILOG_CONSOLE; - - /* - * Register this driver with the serial core - */ - rc = uart_register_driver(&pmz_uart_reg); - if (rc) - return rc; - - /* - * Register each port with the serial core - */ - for (i = 0; i < pmz_ports_count; i++) { - struct uart_pmac_port *uport = &pmz_ports[i]; - /* NULL node may happen on wallstreet */ - if (uport->node != NULL) - rc = uart_add_one_port(&pmz_uart_reg, &uport->port); - if (rc) - goto err_out; - } - - return 0; -err_out: - while (i-- > 0) { - struct uart_pmac_port *uport = &pmz_ports[i]; - uart_remove_one_port(&pmz_uart_reg, &uport->port); - } - uart_unregister_driver(&pmz_uart_reg); - return rc; -} - -#ifdef CONFIG_PPC_PMAC - -static struct of_device_id pmz_match[] = -{ - { - .name = "ch-a", - }, - { - .name = "ch-b", - }, - {}, -}; -MODULE_DEVICE_TABLE (of, pmz_match); - -static struct macio_driver pmz_driver = { - .driver = { - .name = "pmac_zilog", - .owner = THIS_MODULE, - .of_match_table = pmz_match, - }, - .probe = pmz_attach, - .remove = pmz_detach, - .suspend = pmz_suspend, - .resume = pmz_resume, -}; - -#else - -static struct platform_driver pmz_driver = { - .remove = __exit_p(pmz_detach), - .driver = { - .name = "scc", - .owner = THIS_MODULE, - }, -}; - -#endif /* !CONFIG_PPC_PMAC */ - -static int __init init_pmz(void) -{ - int rc, i; - printk(KERN_INFO "%s\n", version); - - /* - * First, we need to do a direct OF-based probe pass. We - * do that because we want serial console up before the - * macio stuffs calls us back, and since that makes it - * easier to pass the proper number of channels to - * uart_register_driver() - */ - if (pmz_ports_count == 0) - pmz_probe(); - - /* - * Bail early if no port found - */ - if (pmz_ports_count == 0) - return -ENODEV; - - /* - * Now we register with the serial layer - */ - rc = pmz_register(); - if (rc) { - printk(KERN_ERR - "pmac_zilog: Error registering serial device, disabling pmac_zilog.\n" - "pmac_zilog: Did another serial driver already claim the minors?\n"); - /* effectively "pmz_unprobe()" */ - for (i=0; i < pmz_ports_count; i++) - pmz_dispose_port(&pmz_ports[i]); - return rc; - } - - /* - * Then we register the macio driver itself - */ -#ifdef CONFIG_PPC_PMAC - return macio_register_driver(&pmz_driver); -#else - return platform_driver_probe(&pmz_driver, pmz_attach); -#endif -} - -static void __exit exit_pmz(void) -{ - int i; - -#ifdef CONFIG_PPC_PMAC - /* Get rid of macio-driver (detach from macio) */ - macio_unregister_driver(&pmz_driver); -#else - platform_driver_unregister(&pmz_driver); -#endif - - for (i = 0; i < pmz_ports_count; i++) { - struct uart_pmac_port *uport = &pmz_ports[i]; - if (uport->node != NULL) { - uart_remove_one_port(&pmz_uart_reg, &uport->port); - pmz_dispose_port(uport); - } - } - /* Unregister UART driver */ - uart_unregister_driver(&pmz_uart_reg); -} - -#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE - -static void pmz_console_putchar(struct uart_port *port, int ch) -{ - struct uart_pmac_port *uap = (struct uart_pmac_port *)port; - - /* Wait for the transmit buffer to empty. */ - while ((read_zsreg(uap, R0) & Tx_BUF_EMP) == 0) - udelay(5); - write_zsdata(uap, ch); -} - -/* - * Print a string to the serial port trying not to disturb - * any possible real use of the port... - */ -static void pmz_console_write(struct console *con, const char *s, unsigned int count) -{ - struct uart_pmac_port *uap = &pmz_ports[con->index]; - unsigned long flags; - - if (ZS_IS_ASLEEP(uap)) - return; - spin_lock_irqsave(&uap->port.lock, flags); - - /* Turn of interrupts and enable the transmitter. */ - write_zsreg(uap, R1, uap->curregs[1] & ~TxINT_ENAB); - write_zsreg(uap, R5, uap->curregs[5] | TxENABLE | RTS | DTR); - - uart_console_write(&uap->port, s, count, pmz_console_putchar); - - /* Restore the values in the registers. */ - write_zsreg(uap, R1, uap->curregs[1]); - /* Don't disable the transmitter. */ - - spin_unlock_irqrestore(&uap->port.lock, flags); -} - -/* - * Setup the serial console - */ -static int __init pmz_console_setup(struct console *co, char *options) -{ - struct uart_pmac_port *uap; - struct uart_port *port; - int baud = 38400; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - unsigned long pwr_delay; - - /* - * XServe's default to 57600 bps - */ - if (of_machine_is_compatible("RackMac1,1") - || of_machine_is_compatible("RackMac1,2") - || of_machine_is_compatible("MacRISC4")) - baud = 57600; - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - if (co->index >= pmz_ports_count) - co->index = 0; - uap = &pmz_ports[co->index]; - if (uap->node == NULL) - return -ENODEV; - port = &uap->port; - - /* - * Mark port as beeing a console - */ - uap->flags |= PMACZILOG_FLAG_IS_CONS; - - /* - * Temporary fix for uart layer who didn't setup the spinlock yet - */ - spin_lock_init(&port->lock); - - /* - * Enable the hardware - */ - pwr_delay = __pmz_startup(uap); - if (pwr_delay) - mdelay(pwr_delay); - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - -static int __init pmz_console_init(void) -{ - /* Probe ports */ - pmz_probe(); - - /* TODO: Autoprobe console based on OF */ - /* pmz_console.index = i; */ - register_console(&pmz_console); - - return 0; - -} -console_initcall(pmz_console_init); -#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */ - -module_init(init_pmz); -module_exit(exit_pmz); diff --git a/drivers/serial/pmac_zilog.h b/drivers/serial/pmac_zilog.h deleted file mode 100644 index cbc34fbb1b20..000000000000 --- a/drivers/serial/pmac_zilog.h +++ /dev/null @@ -1,396 +0,0 @@ -#ifndef __PMAC_ZILOG_H__ -#define __PMAC_ZILOG_H__ - -#ifdef CONFIG_PPC_PMAC -#define pmz_debug(fmt, arg...) dev_dbg(&uap->dev->ofdev.dev, fmt, ## arg) -#define pmz_error(fmt, arg...) dev_err(&uap->dev->ofdev.dev, fmt, ## arg) -#define pmz_info(fmt, arg...) dev_info(&uap->dev->ofdev.dev, fmt, ## arg) -#else -#define pmz_debug(fmt, arg...) dev_dbg(&uap->node->dev, fmt, ## arg) -#define pmz_error(fmt, arg...) dev_err(&uap->node->dev, fmt, ## arg) -#define pmz_info(fmt, arg...) dev_info(&uap->node->dev, fmt, ## arg) -#endif - -/* - * At most 2 ESCCs with 2 ports each - */ -#define MAX_ZS_PORTS 4 - -/* - * We wrap our port structure around the generic uart_port. - */ -#define NUM_ZSREGS 17 - -struct uart_pmac_port { - struct uart_port port; - struct uart_pmac_port *mate; - -#ifdef CONFIG_PPC_PMAC - /* macio_dev for the escc holding this port (maybe be null on - * early inited port) - */ - struct macio_dev *dev; - /* device node to this port, this points to one of 2 childs - * of "escc" node (ie. ch-a or ch-b) - */ - struct device_node *node; -#else - struct platform_device *node; -#endif - - /* Port type as obtained from device tree (IRDA, modem, ...) */ - int port_type; - u8 curregs[NUM_ZSREGS]; - - unsigned int flags; -#define PMACZILOG_FLAG_IS_CONS 0x00000001 -#define PMACZILOG_FLAG_IS_KGDB 0x00000002 -#define PMACZILOG_FLAG_MODEM_STATUS 0x00000004 -#define PMACZILOG_FLAG_IS_CHANNEL_A 0x00000008 -#define PMACZILOG_FLAG_REGS_HELD 0x00000010 -#define PMACZILOG_FLAG_TX_STOPPED 0x00000020 -#define PMACZILOG_FLAG_TX_ACTIVE 0x00000040 -#define PMACZILOG_FLAG_ENABLED 0x00000080 -#define PMACZILOG_FLAG_IS_IRDA 0x00000100 -#define PMACZILOG_FLAG_IS_INTMODEM 0x00000200 -#define PMACZILOG_FLAG_HAS_DMA 0x00000400 -#define PMACZILOG_FLAG_RSRC_REQUESTED 0x00000800 -#define PMACZILOG_FLAG_IS_ASLEEP 0x00001000 -#define PMACZILOG_FLAG_IS_OPEN 0x00002000 -#define PMACZILOG_FLAG_IS_IRQ_ON 0x00004000 -#define PMACZILOG_FLAG_IS_EXTCLK 0x00008000 -#define PMACZILOG_FLAG_BREAK 0x00010000 - - unsigned char parity_mask; - unsigned char prev_status; - - volatile u8 __iomem *control_reg; - volatile u8 __iomem *data_reg; - -#ifdef CONFIG_PPC_PMAC - unsigned int tx_dma_irq; - unsigned int rx_dma_irq; - volatile struct dbdma_regs __iomem *tx_dma_regs; - volatile struct dbdma_regs __iomem *rx_dma_regs; -#endif - - struct ktermios termios_cache; -}; - -#define to_pmz(p) ((struct uart_pmac_port *)(p)) - -static inline struct uart_pmac_port *pmz_get_port_A(struct uart_pmac_port *uap) -{ - if (uap->flags & PMACZILOG_FLAG_IS_CHANNEL_A) - return uap; - return uap->mate; -} - -/* - * Register accessors. Note that we don't need to enforce a recovery - * delay on PCI PowerMac hardware, it's dealt in HW by the MacIO chip, - * though if we try to use this driver on older machines, we might have - * to add it back - */ -static inline u8 read_zsreg(struct uart_pmac_port *port, u8 reg) -{ - if (reg != 0) - writeb(reg, port->control_reg); - return readb(port->control_reg); -} - -static inline void write_zsreg(struct uart_pmac_port *port, u8 reg, u8 value) -{ - if (reg != 0) - writeb(reg, port->control_reg); - writeb(value, port->control_reg); -} - -static inline u8 read_zsdata(struct uart_pmac_port *port) -{ - return readb(port->data_reg); -} - -static inline void write_zsdata(struct uart_pmac_port *port, u8 data) -{ - writeb(data, port->data_reg); -} - -static inline void zssync(struct uart_pmac_port *port) -{ - (void)readb(port->control_reg); -} - -/* Conversion routines to/from brg time constants from/to bits - * per second. - */ -#define BRG_TO_BPS(brg, freq) ((freq) / 2 / ((brg) + 2)) -#define BPS_TO_BRG(bps, freq) ((((freq) + (bps)) / (2 * (bps))) - 2) - -#define ZS_CLOCK 3686400 /* Z8530 RTxC input clock rate */ - -/* The Zilog register set */ - -#define FLAG 0x7e - -/* Write Register 0 */ -#define R0 0 /* Register selects */ -#define R1 1 -#define R2 2 -#define R3 3 -#define R4 4 -#define R5 5 -#define R6 6 -#define R7 7 -#define R8 8 -#define R9 9 -#define R10 10 -#define R11 11 -#define R12 12 -#define R13 13 -#define R14 14 -#define R15 15 -#define R7P 16 - -#define NULLCODE 0 /* Null Code */ -#define POINT_HIGH 0x8 /* Select upper half of registers */ -#define RES_EXT_INT 0x10 /* Reset Ext. Status Interrupts */ -#define SEND_ABORT 0x18 /* HDLC Abort */ -#define RES_RxINT_FC 0x20 /* Reset RxINT on First Character */ -#define RES_Tx_P 0x28 /* Reset TxINT Pending */ -#define ERR_RES 0x30 /* Error Reset */ -#define RES_H_IUS 0x38 /* Reset highest IUS */ - -#define RES_Rx_CRC 0x40 /* Reset Rx CRC Checker */ -#define RES_Tx_CRC 0x80 /* Reset Tx CRC Checker */ -#define RES_EOM_L 0xC0 /* Reset EOM latch */ - -/* Write Register 1 */ - -#define EXT_INT_ENAB 0x1 /* Ext Int Enable */ -#define TxINT_ENAB 0x2 /* Tx Int Enable */ -#define PAR_SPEC 0x4 /* Parity is special condition */ - -#define RxINT_DISAB 0 /* Rx Int Disable */ -#define RxINT_FCERR 0x8 /* Rx Int on First Character Only or Error */ -#define INT_ALL_Rx 0x10 /* Int on all Rx Characters or error */ -#define INT_ERR_Rx 0x18 /* Int on error only */ -#define RxINT_MASK 0x18 - -#define WT_RDY_RT 0x20 /* W/Req reflects recv if 1, xmit if 0 */ -#define WT_FN_RDYFN 0x40 /* W/Req pin is DMA request if 1, wait if 0 */ -#define WT_RDY_ENAB 0x80 /* Enable W/Req pin */ - -/* Write Register #2 (Interrupt Vector) */ - -/* Write Register 3 */ - -#define RxENABLE 0x1 /* Rx Enable */ -#define SYNC_L_INH 0x2 /* Sync Character Load Inhibit */ -#define ADD_SM 0x4 /* Address Search Mode (SDLC) */ -#define RxCRC_ENAB 0x8 /* Rx CRC Enable */ -#define ENT_HM 0x10 /* Enter Hunt Mode */ -#define AUTO_ENAB 0x20 /* Auto Enables */ -#define Rx5 0x0 /* Rx 5 Bits/Character */ -#define Rx7 0x40 /* Rx 7 Bits/Character */ -#define Rx6 0x80 /* Rx 6 Bits/Character */ -#define Rx8 0xc0 /* Rx 8 Bits/Character */ -#define RxN_MASK 0xc0 - -/* Write Register 4 */ - -#define PAR_ENAB 0x1 /* Parity Enable */ -#define PAR_EVEN 0x2 /* Parity Even/Odd* */ - -#define SYNC_ENAB 0 /* Sync Modes Enable */ -#define SB1 0x4 /* 1 stop bit/char */ -#define SB15 0x8 /* 1.5 stop bits/char */ -#define SB2 0xc /* 2 stop bits/char */ -#define SB_MASK 0xc - -#define MONSYNC 0 /* 8 Bit Sync character */ -#define BISYNC 0x10 /* 16 bit sync character */ -#define SDLC 0x20 /* SDLC Mode (01111110 Sync Flag) */ -#define EXTSYNC 0x30 /* External Sync Mode */ - -#define X1CLK 0x0 /* x1 clock mode */ -#define X16CLK 0x40 /* x16 clock mode */ -#define X32CLK 0x80 /* x32 clock mode */ -#define X64CLK 0xC0 /* x64 clock mode */ -#define XCLK_MASK 0xC0 - -/* Write Register 5 */ - -#define TxCRC_ENAB 0x1 /* Tx CRC Enable */ -#define RTS 0x2 /* RTS */ -#define SDLC_CRC 0x4 /* SDLC/CRC-16 */ -#define TxENABLE 0x8 /* Tx Enable */ -#define SND_BRK 0x10 /* Send Break */ -#define Tx5 0x0 /* Tx 5 bits (or less)/character */ -#define Tx7 0x20 /* Tx 7 bits/character */ -#define Tx6 0x40 /* Tx 6 bits/character */ -#define Tx8 0x60 /* Tx 8 bits/character */ -#define TxN_MASK 0x60 -#define DTR 0x80 /* DTR */ - -/* Write Register 6 (Sync bits 0-7/SDLC Address Field) */ - -/* Write Register 7 (Sync bits 8-15/SDLC 01111110) */ - -/* Write Register 7' (Some enhanced feature control) */ -#define ENEXREAD 0x40 /* Enable read of some write registers */ - -/* Write Register 8 (transmit buffer) */ - -/* Write Register 9 (Master interrupt control) */ -#define VIS 1 /* Vector Includes Status */ -#define NV 2 /* No Vector */ -#define DLC 4 /* Disable Lower Chain */ -#define MIE 8 /* Master Interrupt Enable */ -#define STATHI 0x10 /* Status high */ -#define NORESET 0 /* No reset on write to R9 */ -#define CHRB 0x40 /* Reset channel B */ -#define CHRA 0x80 /* Reset channel A */ -#define FHWRES 0xc0 /* Force hardware reset */ - -/* Write Register 10 (misc control bits) */ -#define BIT6 1 /* 6 bit/8bit sync */ -#define LOOPMODE 2 /* SDLC Loop mode */ -#define ABUNDER 4 /* Abort/flag on SDLC xmit underrun */ -#define MARKIDLE 8 /* Mark/flag on idle */ -#define GAOP 0x10 /* Go active on poll */ -#define NRZ 0 /* NRZ mode */ -#define NRZI 0x20 /* NRZI mode */ -#define FM1 0x40 /* FM1 (transition = 1) */ -#define FM0 0x60 /* FM0 (transition = 0) */ -#define CRCPS 0x80 /* CRC Preset I/O */ - -/* Write Register 11 (Clock Mode control) */ -#define TRxCXT 0 /* TRxC = Xtal output */ -#define TRxCTC 1 /* TRxC = Transmit clock */ -#define TRxCBR 2 /* TRxC = BR Generator Output */ -#define TRxCDP 3 /* TRxC = DPLL output */ -#define TRxCOI 4 /* TRxC O/I */ -#define TCRTxCP 0 /* Transmit clock = RTxC pin */ -#define TCTRxCP 8 /* Transmit clock = TRxC pin */ -#define TCBR 0x10 /* Transmit clock = BR Generator output */ -#define TCDPLL 0x18 /* Transmit clock = DPLL output */ -#define RCRTxCP 0 /* Receive clock = RTxC pin */ -#define RCTRxCP 0x20 /* Receive clock = TRxC pin */ -#define RCBR 0x40 /* Receive clock = BR Generator output */ -#define RCDPLL 0x60 /* Receive clock = DPLL output */ -#define RTxCX 0x80 /* RTxC Xtal/No Xtal */ - -/* Write Register 12 (lower byte of baud rate generator time constant) */ - -/* Write Register 13 (upper byte of baud rate generator time constant) */ - -/* Write Register 14 (Misc control bits) */ -#define BRENAB 1 /* Baud rate generator enable */ -#define BRSRC 2 /* Baud rate generator source */ -#define DTRREQ 4 /* DTR/Request function */ -#define AUTOECHO 8 /* Auto Echo */ -#define LOOPBAK 0x10 /* Local loopback */ -#define SEARCH 0x20 /* Enter search mode */ -#define RMC 0x40 /* Reset missing clock */ -#define DISDPLL 0x60 /* Disable DPLL */ -#define SSBR 0x80 /* Set DPLL source = BR generator */ -#define SSRTxC 0xa0 /* Set DPLL source = RTxC */ -#define SFMM 0xc0 /* Set FM mode */ -#define SNRZI 0xe0 /* Set NRZI mode */ - -/* Write Register 15 (external/status interrupt control) */ -#define EN85C30 1 /* Enable some 85c30-enhanced registers */ -#define ZCIE 2 /* Zero count IE */ -#define ENSTFIFO 4 /* Enable status FIFO (SDLC) */ -#define DCDIE 8 /* DCD IE */ -#define SYNCIE 0x10 /* Sync/hunt IE */ -#define CTSIE 0x20 /* CTS IE */ -#define TxUIE 0x40 /* Tx Underrun/EOM IE */ -#define BRKIE 0x80 /* Break/Abort IE */ - - -/* Read Register 0 */ -#define Rx_CH_AV 0x1 /* Rx Character Available */ -#define ZCOUNT 0x2 /* Zero count */ -#define Tx_BUF_EMP 0x4 /* Tx Buffer empty */ -#define DCD 0x8 /* DCD */ -#define SYNC_HUNT 0x10 /* Sync/hunt */ -#define CTS 0x20 /* CTS */ -#define TxEOM 0x40 /* Tx underrun */ -#define BRK_ABRT 0x80 /* Break/Abort */ - -/* Read Register 1 */ -#define ALL_SNT 0x1 /* All sent */ -/* Residue Data for 8 Rx bits/char programmed */ -#define RES3 0x8 /* 0/3 */ -#define RES4 0x4 /* 0/4 */ -#define RES5 0xc /* 0/5 */ -#define RES6 0x2 /* 0/6 */ -#define RES7 0xa /* 0/7 */ -#define RES8 0x6 /* 0/8 */ -#define RES18 0xe /* 1/8 */ -#define RES28 0x0 /* 2/8 */ -/* Special Rx Condition Interrupts */ -#define PAR_ERR 0x10 /* Parity error */ -#define Rx_OVR 0x20 /* Rx Overrun Error */ -#define CRC_ERR 0x40 /* CRC/Framing Error */ -#define END_FR 0x80 /* End of Frame (SDLC) */ - -/* Read Register 2 (channel b only) - Interrupt vector */ -#define CHB_Tx_EMPTY 0x00 -#define CHB_EXT_STAT 0x02 -#define CHB_Rx_AVAIL 0x04 -#define CHB_SPECIAL 0x06 -#define CHA_Tx_EMPTY 0x08 -#define CHA_EXT_STAT 0x0a -#define CHA_Rx_AVAIL 0x0c -#define CHA_SPECIAL 0x0e -#define STATUS_MASK 0x06 - -/* Read Register 3 (interrupt pending register) ch a only */ -#define CHBEXT 0x1 /* Channel B Ext/Stat IP */ -#define CHBTxIP 0x2 /* Channel B Tx IP */ -#define CHBRxIP 0x4 /* Channel B Rx IP */ -#define CHAEXT 0x8 /* Channel A Ext/Stat IP */ -#define CHATxIP 0x10 /* Channel A Tx IP */ -#define CHARxIP 0x20 /* Channel A Rx IP */ - -/* Read Register 8 (receive data register) */ - -/* Read Register 10 (misc status bits) */ -#define ONLOOP 2 /* On loop */ -#define LOOPSEND 0x10 /* Loop sending */ -#define CLK2MIS 0x40 /* Two clocks missing */ -#define CLK1MIS 0x80 /* One clock missing */ - -/* Read Register 12 (lower byte of baud rate generator constant) */ - -/* Read Register 13 (upper byte of baud rate generator constant) */ - -/* Read Register 15 (value of WR 15) */ - -/* Misc macros */ -#define ZS_CLEARERR(port) (write_zsreg(port, 0, ERR_RES)) -#define ZS_CLEARFIFO(port) do { volatile unsigned char garbage; \ - garbage = read_zsdata(port); \ - garbage = read_zsdata(port); \ - garbage = read_zsdata(port); \ - } while(0) - -#define ZS_IS_CONS(UP) ((UP)->flags & PMACZILOG_FLAG_IS_CONS) -#define ZS_IS_KGDB(UP) ((UP)->flags & PMACZILOG_FLAG_IS_KGDB) -#define ZS_IS_CHANNEL_A(UP) ((UP)->flags & PMACZILOG_FLAG_IS_CHANNEL_A) -#define ZS_REGS_HELD(UP) ((UP)->flags & PMACZILOG_FLAG_REGS_HELD) -#define ZS_TX_STOPPED(UP) ((UP)->flags & PMACZILOG_FLAG_TX_STOPPED) -#define ZS_TX_ACTIVE(UP) ((UP)->flags & PMACZILOG_FLAG_TX_ACTIVE) -#define ZS_WANTS_MODEM_STATUS(UP) ((UP)->flags & PMACZILOG_FLAG_MODEM_STATUS) -#define ZS_IS_IRDA(UP) ((UP)->flags & PMACZILOG_FLAG_IS_IRDA) -#define ZS_IS_INTMODEM(UP) ((UP)->flags & PMACZILOG_FLAG_IS_INTMODEM) -#define ZS_HAS_DMA(UP) ((UP)->flags & PMACZILOG_FLAG_HAS_DMA) -#define ZS_IS_ASLEEP(UP) ((UP)->flags & PMACZILOG_FLAG_IS_ASLEEP) -#define ZS_IS_OPEN(UP) ((UP)->flags & PMACZILOG_FLAG_IS_OPEN) -#define ZS_IS_IRQ_ON(UP) ((UP)->flags & PMACZILOG_FLAG_IS_IRQ_ON) -#define ZS_IS_EXTCLK(UP) ((UP)->flags & PMACZILOG_FLAG_IS_EXTCLK) - -#endif /* __PMAC_ZILOG_H__ */ diff --git a/drivers/serial/pnx8xxx_uart.c b/drivers/serial/pnx8xxx_uart.c deleted file mode 100644 index 0aa75a97531c..000000000000 --- a/drivers/serial/pnx8xxx_uart.c +++ /dev/null @@ -1,854 +0,0 @@ -/* - * UART driver for PNX8XXX SoCs - * - * Author: Per Hallsmark per.hallsmark@mvista.com - * Ported to 2.6 kernel by EmbeddedAlley - * Reworked by Vitaly Wool <vitalywool@gmail.com> - * - * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. - * Copyright (C) 2000 Deep Blue Solutions Ltd. - * - * This file is licensed under the terms of the GNU General Public License - * version 2. This program is licensed "as is" without any warranty of - * any kind, whether express or implied. - * - */ - -#if defined(CONFIG_SERIAL_PNX8XXX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/device.h> -#include <linux/platform_device.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/serial.h> -#include <linux/serial_pnx8xxx.h> - -#include <asm/io.h> -#include <asm/irq.h> - -/* We'll be using StrongARM sa1100 serial port major/minor */ -#define SERIAL_PNX8XXX_MAJOR 204 -#define MINOR_START 5 - -#define NR_PORTS 2 - -#define PNX8XXX_ISR_PASS_LIMIT 256 - -/* - * Convert from ignore_status_mask or read_status_mask to FIFO - * and interrupt status bits - */ -#define SM_TO_FIFO(x) ((x) >> 10) -#define SM_TO_ISTAT(x) ((x) & 0x000001ff) -#define FIFO_TO_SM(x) ((x) << 10) -#define ISTAT_TO_SM(x) ((x) & 0x000001ff) - -/* - * This is the size of our serial port register set. - */ -#define UART_PORT_SIZE 0x1000 - -/* - * This determines how often we check the modem status signals - * for any change. They generally aren't connected to an IRQ - * so we have to poll them. We also check immediately before - * filling the TX fifo incase CTS has been dropped. - */ -#define MCTRL_TIMEOUT (250*HZ/1000) - -extern struct pnx8xxx_port pnx8xxx_ports[]; - -static inline int serial_in(struct pnx8xxx_port *sport, int offset) -{ - return (__raw_readl(sport->port.membase + offset)); -} - -static inline void serial_out(struct pnx8xxx_port *sport, int offset, int value) -{ - __raw_writel(value, sport->port.membase + offset); -} - -/* - * Handle any change of modem status signal since we were last called. - */ -static void pnx8xxx_mctrl_check(struct pnx8xxx_port *sport) -{ - unsigned int status, changed; - - status = sport->port.ops->get_mctrl(&sport->port); - changed = status ^ sport->old_status; - - if (changed == 0) - return; - - sport->old_status = status; - - if (changed & TIOCM_RI) - sport->port.icount.rng++; - if (changed & TIOCM_DSR) - sport->port.icount.dsr++; - if (changed & TIOCM_CAR) - uart_handle_dcd_change(&sport->port, status & TIOCM_CAR); - if (changed & TIOCM_CTS) - uart_handle_cts_change(&sport->port, status & TIOCM_CTS); - - wake_up_interruptible(&sport->port.state->port.delta_msr_wait); -} - -/* - * This is our per-port timeout handler, for checking the - * modem status signals. - */ -static void pnx8xxx_timeout(unsigned long data) -{ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)data; - unsigned long flags; - - if (sport->port.state) { - spin_lock_irqsave(&sport->port.lock, flags); - pnx8xxx_mctrl_check(sport); - spin_unlock_irqrestore(&sport->port.lock, flags); - - mod_timer(&sport->timer, jiffies + MCTRL_TIMEOUT); - } -} - -/* - * interrupts disabled on entry - */ -static void pnx8xxx_stop_tx(struct uart_port *port) -{ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port; - u32 ien; - - /* Disable TX intr */ - ien = serial_in(sport, PNX8XXX_IEN); - serial_out(sport, PNX8XXX_IEN, ien & ~PNX8XXX_UART_INT_ALLTX); - - /* Clear all pending TX intr */ - serial_out(sport, PNX8XXX_ICLR, PNX8XXX_UART_INT_ALLTX); -} - -/* - * interrupts may not be disabled on entry - */ -static void pnx8xxx_start_tx(struct uart_port *port) -{ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port; - u32 ien; - - /* Clear all pending TX intr */ - serial_out(sport, PNX8XXX_ICLR, PNX8XXX_UART_INT_ALLTX); - - /* Enable TX intr */ - ien = serial_in(sport, PNX8XXX_IEN); - serial_out(sport, PNX8XXX_IEN, ien | PNX8XXX_UART_INT_ALLTX); -} - -/* - * Interrupts enabled - */ -static void pnx8xxx_stop_rx(struct uart_port *port) -{ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port; - u32 ien; - - /* Disable RX intr */ - ien = serial_in(sport, PNX8XXX_IEN); - serial_out(sport, PNX8XXX_IEN, ien & ~PNX8XXX_UART_INT_ALLRX); - - /* Clear all pending RX intr */ - serial_out(sport, PNX8XXX_ICLR, PNX8XXX_UART_INT_ALLRX); -} - -/* - * Set the modem control timer to fire immediately. - */ -static void pnx8xxx_enable_ms(struct uart_port *port) -{ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port; - - mod_timer(&sport->timer, jiffies); -} - -static void pnx8xxx_rx_chars(struct pnx8xxx_port *sport) -{ - struct tty_struct *tty = sport->port.state->port.tty; - unsigned int status, ch, flg; - - status = FIFO_TO_SM(serial_in(sport, PNX8XXX_FIFO)) | - ISTAT_TO_SM(serial_in(sport, PNX8XXX_ISTAT)); - while (status & FIFO_TO_SM(PNX8XXX_UART_FIFO_RXFIFO)) { - ch = serial_in(sport, PNX8XXX_FIFO) & 0xff; - - sport->port.icount.rx++; - - flg = TTY_NORMAL; - - /* - * note that the error handling code is - * out of the main execution path - */ - if (status & (FIFO_TO_SM(PNX8XXX_UART_FIFO_RXFE | - PNX8XXX_UART_FIFO_RXPAR | - PNX8XXX_UART_FIFO_RXBRK) | - ISTAT_TO_SM(PNX8XXX_UART_INT_RXOVRN))) { - if (status & FIFO_TO_SM(PNX8XXX_UART_FIFO_RXBRK)) { - status &= ~(FIFO_TO_SM(PNX8XXX_UART_FIFO_RXFE) | - FIFO_TO_SM(PNX8XXX_UART_FIFO_RXPAR)); - sport->port.icount.brk++; - if (uart_handle_break(&sport->port)) - goto ignore_char; - } else if (status & FIFO_TO_SM(PNX8XXX_UART_FIFO_RXPAR)) - sport->port.icount.parity++; - else if (status & FIFO_TO_SM(PNX8XXX_UART_FIFO_RXFE)) - sport->port.icount.frame++; - if (status & ISTAT_TO_SM(PNX8XXX_UART_INT_RXOVRN)) - sport->port.icount.overrun++; - - status &= sport->port.read_status_mask; - - if (status & FIFO_TO_SM(PNX8XXX_UART_FIFO_RXPAR)) - flg = TTY_PARITY; - else if (status & FIFO_TO_SM(PNX8XXX_UART_FIFO_RXFE)) - flg = TTY_FRAME; - -#ifdef SUPPORT_SYSRQ - sport->port.sysrq = 0; -#endif - } - - if (uart_handle_sysrq_char(&sport->port, ch)) - goto ignore_char; - - uart_insert_char(&sport->port, status, - ISTAT_TO_SM(PNX8XXX_UART_INT_RXOVRN), ch, flg); - - ignore_char: - serial_out(sport, PNX8XXX_LCR, serial_in(sport, PNX8XXX_LCR) | - PNX8XXX_UART_LCR_RX_NEXT); - status = FIFO_TO_SM(serial_in(sport, PNX8XXX_FIFO)) | - ISTAT_TO_SM(serial_in(sport, PNX8XXX_ISTAT)); - } - tty_flip_buffer_push(tty); -} - -static void pnx8xxx_tx_chars(struct pnx8xxx_port *sport) -{ - struct circ_buf *xmit = &sport->port.state->xmit; - - if (sport->port.x_char) { - serial_out(sport, PNX8XXX_FIFO, sport->port.x_char); - sport->port.icount.tx++; - sport->port.x_char = 0; - return; - } - - /* - * Check the modem control lines before - * transmitting anything. - */ - pnx8xxx_mctrl_check(sport); - - if (uart_circ_empty(xmit) || uart_tx_stopped(&sport->port)) { - pnx8xxx_stop_tx(&sport->port); - return; - } - - /* - * TX while bytes available - */ - while (((serial_in(sport, PNX8XXX_FIFO) & - PNX8XXX_UART_FIFO_TXFIFO) >> 16) < 16) { - serial_out(sport, PNX8XXX_FIFO, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - sport->port.icount.tx++; - if (uart_circ_empty(xmit)) - break; - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&sport->port); - - if (uart_circ_empty(xmit)) - pnx8xxx_stop_tx(&sport->port); -} - -static irqreturn_t pnx8xxx_int(int irq, void *dev_id) -{ - struct pnx8xxx_port *sport = dev_id; - unsigned int status; - - spin_lock(&sport->port.lock); - /* Get the interrupts */ - status = serial_in(sport, PNX8XXX_ISTAT) & serial_in(sport, PNX8XXX_IEN); - - /* Byte or break signal received */ - if (status & (PNX8XXX_UART_INT_RX | PNX8XXX_UART_INT_BREAK)) - pnx8xxx_rx_chars(sport); - - /* TX holding register empty - transmit a byte */ - if (status & PNX8XXX_UART_INT_TX) - pnx8xxx_tx_chars(sport); - - /* Clear the ISTAT register */ - serial_out(sport, PNX8XXX_ICLR, status); - - spin_unlock(&sport->port.lock); - return IRQ_HANDLED; -} - -/* - * Return TIOCSER_TEMT when transmitter is not busy. - */ -static unsigned int pnx8xxx_tx_empty(struct uart_port *port) -{ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port; - - return serial_in(sport, PNX8XXX_FIFO) & PNX8XXX_UART_FIFO_TXFIFO_STA ? 0 : TIOCSER_TEMT; -} - -static unsigned int pnx8xxx_get_mctrl(struct uart_port *port) -{ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port; - unsigned int mctrl = TIOCM_DSR; - unsigned int msr; - - /* REVISIT */ - - msr = serial_in(sport, PNX8XXX_MCR); - - mctrl |= msr & PNX8XXX_UART_MCR_CTS ? TIOCM_CTS : 0; - mctrl |= msr & PNX8XXX_UART_MCR_DCD ? TIOCM_CAR : 0; - - return mctrl; -} - -static void pnx8xxx_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ -#if 0 /* FIXME */ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port; - unsigned int msr; -#endif -} - -/* - * Interrupts always disabled. - */ -static void pnx8xxx_break_ctl(struct uart_port *port, int break_state) -{ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port; - unsigned long flags; - unsigned int lcr; - - spin_lock_irqsave(&sport->port.lock, flags); - lcr = serial_in(sport, PNX8XXX_LCR); - if (break_state == -1) - lcr |= PNX8XXX_UART_LCR_TXBREAK; - else - lcr &= ~PNX8XXX_UART_LCR_TXBREAK; - serial_out(sport, PNX8XXX_LCR, lcr); - spin_unlock_irqrestore(&sport->port.lock, flags); -} - -static int pnx8xxx_startup(struct uart_port *port) -{ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port; - int retval; - - /* - * Allocate the IRQ - */ - retval = request_irq(sport->port.irq, pnx8xxx_int, 0, - "pnx8xxx-uart", sport); - if (retval) - return retval; - - /* - * Finally, clear and enable interrupts - */ - - serial_out(sport, PNX8XXX_ICLR, PNX8XXX_UART_INT_ALLRX | - PNX8XXX_UART_INT_ALLTX); - - serial_out(sport, PNX8XXX_IEN, serial_in(sport, PNX8XXX_IEN) | - PNX8XXX_UART_INT_ALLRX | - PNX8XXX_UART_INT_ALLTX); - - /* - * Enable modem status interrupts - */ - spin_lock_irq(&sport->port.lock); - pnx8xxx_enable_ms(&sport->port); - spin_unlock_irq(&sport->port.lock); - - return 0; -} - -static void pnx8xxx_shutdown(struct uart_port *port) -{ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port; - int lcr; - - /* - * Stop our timer. - */ - del_timer_sync(&sport->timer); - - /* - * Disable all interrupts - */ - serial_out(sport, PNX8XXX_IEN, 0); - - /* - * Reset the Tx and Rx FIFOS, disable the break condition - */ - lcr = serial_in(sport, PNX8XXX_LCR); - lcr &= ~PNX8XXX_UART_LCR_TXBREAK; - lcr |= PNX8XXX_UART_LCR_TX_RST | PNX8XXX_UART_LCR_RX_RST; - serial_out(sport, PNX8XXX_LCR, lcr); - - /* - * Clear all interrupts - */ - serial_out(sport, PNX8XXX_ICLR, PNX8XXX_UART_INT_ALLRX | - PNX8XXX_UART_INT_ALLTX); - - /* - * Free the interrupt - */ - free_irq(sport->port.irq, sport); -} - -static void -pnx8xxx_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port; - unsigned long flags; - unsigned int lcr_fcr, old_ien, baud, quot; - unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8; - - /* - * We only support CS7 and CS8. - */ - while ((termios->c_cflag & CSIZE) != CS7 && - (termios->c_cflag & CSIZE) != CS8) { - termios->c_cflag &= ~CSIZE; - termios->c_cflag |= old_csize; - old_csize = CS8; - } - - if ((termios->c_cflag & CSIZE) == CS8) - lcr_fcr = PNX8XXX_UART_LCR_8BIT; - else - lcr_fcr = 0; - - if (termios->c_cflag & CSTOPB) - lcr_fcr |= PNX8XXX_UART_LCR_2STOPB; - if (termios->c_cflag & PARENB) { - lcr_fcr |= PNX8XXX_UART_LCR_PAREN; - if (!(termios->c_cflag & PARODD)) - lcr_fcr |= PNX8XXX_UART_LCR_PAREVN; - } - - /* - * Ask the core to calculate the divisor for us. - */ - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); - quot = uart_get_divisor(port, baud); - - spin_lock_irqsave(&sport->port.lock, flags); - - sport->port.read_status_mask = ISTAT_TO_SM(PNX8XXX_UART_INT_RXOVRN) | - ISTAT_TO_SM(PNX8XXX_UART_INT_EMPTY) | - ISTAT_TO_SM(PNX8XXX_UART_INT_RX); - if (termios->c_iflag & INPCK) - sport->port.read_status_mask |= - FIFO_TO_SM(PNX8XXX_UART_FIFO_RXFE) | - FIFO_TO_SM(PNX8XXX_UART_FIFO_RXPAR); - if (termios->c_iflag & (BRKINT | PARMRK)) - sport->port.read_status_mask |= - ISTAT_TO_SM(PNX8XXX_UART_INT_BREAK); - - /* - * Characters to ignore - */ - sport->port.ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - sport->port.ignore_status_mask |= - FIFO_TO_SM(PNX8XXX_UART_FIFO_RXFE) | - FIFO_TO_SM(PNX8XXX_UART_FIFO_RXPAR); - if (termios->c_iflag & IGNBRK) { - sport->port.ignore_status_mask |= - ISTAT_TO_SM(PNX8XXX_UART_INT_BREAK); - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - sport->port.ignore_status_mask |= - ISTAT_TO_SM(PNX8XXX_UART_INT_RXOVRN); - } - - /* - * ignore all characters if CREAD is not set - */ - if ((termios->c_cflag & CREAD) == 0) - sport->port.ignore_status_mask |= - ISTAT_TO_SM(PNX8XXX_UART_INT_RX); - - del_timer_sync(&sport->timer); - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - /* - * disable interrupts and drain transmitter - */ - old_ien = serial_in(sport, PNX8XXX_IEN); - serial_out(sport, PNX8XXX_IEN, old_ien & ~(PNX8XXX_UART_INT_ALLTX | - PNX8XXX_UART_INT_ALLRX)); - - while (serial_in(sport, PNX8XXX_FIFO) & PNX8XXX_UART_FIFO_TXFIFO_STA) - barrier(); - - /* then, disable everything */ - serial_out(sport, PNX8XXX_IEN, 0); - - /* Reset the Rx and Tx FIFOs too */ - lcr_fcr |= PNX8XXX_UART_LCR_TX_RST; - lcr_fcr |= PNX8XXX_UART_LCR_RX_RST; - - /* set the parity, stop bits and data size */ - serial_out(sport, PNX8XXX_LCR, lcr_fcr); - - /* set the baud rate */ - quot -= 1; - serial_out(sport, PNX8XXX_BAUD, quot); - - serial_out(sport, PNX8XXX_ICLR, -1); - - serial_out(sport, PNX8XXX_IEN, old_ien); - - if (UART_ENABLE_MS(&sport->port, termios->c_cflag)) - pnx8xxx_enable_ms(&sport->port); - - spin_unlock_irqrestore(&sport->port.lock, flags); -} - -static const char *pnx8xxx_type(struct uart_port *port) -{ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port; - - return sport->port.type == PORT_PNX8XXX ? "PNX8XXX" : NULL; -} - -/* - * Release the memory region(s) being used by 'port'. - */ -static void pnx8xxx_release_port(struct uart_port *port) -{ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port; - - release_mem_region(sport->port.mapbase, UART_PORT_SIZE); -} - -/* - * Request the memory region(s) being used by 'port'. - */ -static int pnx8xxx_request_port(struct uart_port *port) -{ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port; - return request_mem_region(sport->port.mapbase, UART_PORT_SIZE, - "pnx8xxx-uart") != NULL ? 0 : -EBUSY; -} - -/* - * Configure/autoconfigure the port. - */ -static void pnx8xxx_config_port(struct uart_port *port, int flags) -{ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port; - - if (flags & UART_CONFIG_TYPE && - pnx8xxx_request_port(&sport->port) == 0) - sport->port.type = PORT_PNX8XXX; -} - -/* - * Verify the new serial_struct (for TIOCSSERIAL). - * The only change we allow are to the flags and type, and - * even then only between PORT_PNX8XXX and PORT_UNKNOWN - */ -static int -pnx8xxx_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port; - int ret = 0; - - if (ser->type != PORT_UNKNOWN && ser->type != PORT_PNX8XXX) - ret = -EINVAL; - if (sport->port.irq != ser->irq) - ret = -EINVAL; - if (ser->io_type != SERIAL_IO_MEM) - ret = -EINVAL; - if (sport->port.uartclk / 16 != ser->baud_base) - ret = -EINVAL; - if ((void *)sport->port.mapbase != ser->iomem_base) - ret = -EINVAL; - if (sport->port.iobase != ser->port) - ret = -EINVAL; - if (ser->hub6 != 0) - ret = -EINVAL; - return ret; -} - -static struct uart_ops pnx8xxx_pops = { - .tx_empty = pnx8xxx_tx_empty, - .set_mctrl = pnx8xxx_set_mctrl, - .get_mctrl = pnx8xxx_get_mctrl, - .stop_tx = pnx8xxx_stop_tx, - .start_tx = pnx8xxx_start_tx, - .stop_rx = pnx8xxx_stop_rx, - .enable_ms = pnx8xxx_enable_ms, - .break_ctl = pnx8xxx_break_ctl, - .startup = pnx8xxx_startup, - .shutdown = pnx8xxx_shutdown, - .set_termios = pnx8xxx_set_termios, - .type = pnx8xxx_type, - .release_port = pnx8xxx_release_port, - .request_port = pnx8xxx_request_port, - .config_port = pnx8xxx_config_port, - .verify_port = pnx8xxx_verify_port, -}; - - -/* - * Setup the PNX8XXX serial ports. - * - * Note also that we support "console=ttySx" where "x" is either 0 or 1. - */ -static void __init pnx8xxx_init_ports(void) -{ - static int first = 1; - int i; - - if (!first) - return; - first = 0; - - for (i = 0; i < NR_PORTS; i++) { - init_timer(&pnx8xxx_ports[i].timer); - pnx8xxx_ports[i].timer.function = pnx8xxx_timeout; - pnx8xxx_ports[i].timer.data = (unsigned long)&pnx8xxx_ports[i]; - pnx8xxx_ports[i].port.ops = &pnx8xxx_pops; - } -} - -#ifdef CONFIG_SERIAL_PNX8XXX_CONSOLE - -static void pnx8xxx_console_putchar(struct uart_port *port, int ch) -{ - struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port; - int status; - - do { - /* Wait for UART_TX register to empty */ - status = serial_in(sport, PNX8XXX_FIFO); - } while (status & PNX8XXX_UART_FIFO_TXFIFO); - serial_out(sport, PNX8XXX_FIFO, ch); -} - -/* - * Interrupts are disabled on entering - */static void -pnx8xxx_console_write(struct console *co, const char *s, unsigned int count) -{ - struct pnx8xxx_port *sport = &pnx8xxx_ports[co->index]; - unsigned int old_ien, status; - - /* - * First, save IEN and then disable interrupts - */ - old_ien = serial_in(sport, PNX8XXX_IEN); - serial_out(sport, PNX8XXX_IEN, old_ien & ~(PNX8XXX_UART_INT_ALLTX | - PNX8XXX_UART_INT_ALLRX)); - - uart_console_write(&sport->port, s, count, pnx8xxx_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore IEN - */ - do { - /* Wait for UART_TX register to empty */ - status = serial_in(sport, PNX8XXX_FIFO); - } while (status & PNX8XXX_UART_FIFO_TXFIFO); - - /* Clear TX and EMPTY interrupt */ - serial_out(sport, PNX8XXX_ICLR, PNX8XXX_UART_INT_TX | - PNX8XXX_UART_INT_EMPTY); - - serial_out(sport, PNX8XXX_IEN, old_ien); -} - -static int __init -pnx8xxx_console_setup(struct console *co, char *options) -{ - struct pnx8xxx_port *sport; - int baud = 38400; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - if (co->index == -1 || co->index >= NR_PORTS) - co->index = 0; - sport = &pnx8xxx_ports[co->index]; - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(&sport->port, co, baud, parity, bits, flow); -} - -static struct uart_driver pnx8xxx_reg; -static struct console pnx8xxx_console = { - .name = "ttyS", - .write = pnx8xxx_console_write, - .device = uart_console_device, - .setup = pnx8xxx_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &pnx8xxx_reg, -}; - -static int __init pnx8xxx_rs_console_init(void) -{ - pnx8xxx_init_ports(); - register_console(&pnx8xxx_console); - return 0; -} -console_initcall(pnx8xxx_rs_console_init); - -#define PNX8XXX_CONSOLE &pnx8xxx_console -#else -#define PNX8XXX_CONSOLE NULL -#endif - -static struct uart_driver pnx8xxx_reg = { - .owner = THIS_MODULE, - .driver_name = "ttyS", - .dev_name = "ttyS", - .major = SERIAL_PNX8XXX_MAJOR, - .minor = MINOR_START, - .nr = NR_PORTS, - .cons = PNX8XXX_CONSOLE, -}; - -static int pnx8xxx_serial_suspend(struct platform_device *pdev, pm_message_t state) -{ - struct pnx8xxx_port *sport = platform_get_drvdata(pdev); - - return uart_suspend_port(&pnx8xxx_reg, &sport->port); -} - -static int pnx8xxx_serial_resume(struct platform_device *pdev) -{ - struct pnx8xxx_port *sport = platform_get_drvdata(pdev); - - return uart_resume_port(&pnx8xxx_reg, &sport->port); -} - -static int pnx8xxx_serial_probe(struct platform_device *pdev) -{ - struct resource *res = pdev->resource; - int i; - - for (i = 0; i < pdev->num_resources; i++, res++) { - if (!(res->flags & IORESOURCE_MEM)) - continue; - - for (i = 0; i < NR_PORTS; i++) { - if (pnx8xxx_ports[i].port.mapbase != res->start) - continue; - - pnx8xxx_ports[i].port.dev = &pdev->dev; - uart_add_one_port(&pnx8xxx_reg, &pnx8xxx_ports[i].port); - platform_set_drvdata(pdev, &pnx8xxx_ports[i]); - break; - } - } - - return 0; -} - -static int pnx8xxx_serial_remove(struct platform_device *pdev) -{ - struct pnx8xxx_port *sport = platform_get_drvdata(pdev); - - platform_set_drvdata(pdev, NULL); - - if (sport) - uart_remove_one_port(&pnx8xxx_reg, &sport->port); - - return 0; -} - -static struct platform_driver pnx8xxx_serial_driver = { - .driver = { - .name = "pnx8xxx-uart", - .owner = THIS_MODULE, - }, - .probe = pnx8xxx_serial_probe, - .remove = pnx8xxx_serial_remove, - .suspend = pnx8xxx_serial_suspend, - .resume = pnx8xxx_serial_resume, -}; - -static int __init pnx8xxx_serial_init(void) -{ - int ret; - - printk(KERN_INFO "Serial: PNX8XXX driver\n"); - - pnx8xxx_init_ports(); - - ret = uart_register_driver(&pnx8xxx_reg); - if (ret == 0) { - ret = platform_driver_register(&pnx8xxx_serial_driver); - if (ret) - uart_unregister_driver(&pnx8xxx_reg); - } - return ret; -} - -static void __exit pnx8xxx_serial_exit(void) -{ - platform_driver_unregister(&pnx8xxx_serial_driver); - uart_unregister_driver(&pnx8xxx_reg); -} - -module_init(pnx8xxx_serial_init); -module_exit(pnx8xxx_serial_exit); - -MODULE_AUTHOR("Embedded Alley Solutions, Inc."); -MODULE_DESCRIPTION("PNX8XXX SoCs serial port driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_CHARDEV_MAJOR(SERIAL_PNX8XXX_MAJOR); -MODULE_ALIAS("platform:pnx8xxx-uart"); diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c deleted file mode 100644 index 1102a39b44f5..000000000000 --- a/drivers/serial/pxa.c +++ /dev/null @@ -1,879 +0,0 @@ -/* - * linux/drivers/serial/pxa.c - * - * Based on drivers/serial/8250.c by Russell King. - * - * Author: Nicolas Pitre - * Created: Feb 20, 2003 - * Copyright: (C) 2003 Monta Vista Software, Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * Note 1: This driver is made separate from the already too overloaded - * 8250.c because it needs some kirks of its own and that'll make it - * easier to add DMA support. - * - * Note 2: I'm too sick of device allocation policies for serial ports. - * If someone else wants to request an "official" allocation of major/minor - * for this driver please be my guest. And don't forget that new hardware - * to come from Intel might have more than 3 or 4 of those UARTs. Let's - * hope for a better port registration and dynamic device allocation scheme - * with the serial core maintainer satisfaction to appear soon. - */ - - -#if defined(CONFIG_SERIAL_PXA_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/serial_reg.h> -#include <linux/circ_buf.h> -#include <linux/delay.h> -#include <linux/interrupt.h> -#include <linux/platform_device.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/clk.h> -#include <linux/io.h> -#include <linux/slab.h> - -struct uart_pxa_port { - struct uart_port port; - unsigned char ier; - unsigned char lcr; - unsigned char mcr; - unsigned int lsr_break_flag; - struct clk *clk; - char *name; -}; - -static inline unsigned int serial_in(struct uart_pxa_port *up, int offset) -{ - offset <<= 2; - return readl(up->port.membase + offset); -} - -static inline void serial_out(struct uart_pxa_port *up, int offset, int value) -{ - offset <<= 2; - writel(value, up->port.membase + offset); -} - -static void serial_pxa_enable_ms(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - - up->ier |= UART_IER_MSI; - serial_out(up, UART_IER, up->ier); -} - -static void serial_pxa_stop_tx(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - - if (up->ier & UART_IER_THRI) { - up->ier &= ~UART_IER_THRI; - serial_out(up, UART_IER, up->ier); - } -} - -static void serial_pxa_stop_rx(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - - up->ier &= ~UART_IER_RLSI; - up->port.read_status_mask &= ~UART_LSR_DR; - serial_out(up, UART_IER, up->ier); -} - -static inline void receive_chars(struct uart_pxa_port *up, int *status) -{ - struct tty_struct *tty = up->port.state->port.tty; - unsigned int ch, flag; - int max_count = 256; - - do { - ch = serial_in(up, UART_RX); - flag = TTY_NORMAL; - up->port.icount.rx++; - - if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE | - UART_LSR_FE | UART_LSR_OE))) { - /* - * For statistics only - */ - if (*status & UART_LSR_BI) { - *status &= ~(UART_LSR_FE | UART_LSR_PE); - up->port.icount.brk++; - /* - * We do the SysRQ and SAK checking - * here because otherwise the break - * may get masked by ignore_status_mask - * or read_status_mask. - */ - if (uart_handle_break(&up->port)) - goto ignore_char; - } else if (*status & UART_LSR_PE) - up->port.icount.parity++; - else if (*status & UART_LSR_FE) - up->port.icount.frame++; - if (*status & UART_LSR_OE) - up->port.icount.overrun++; - - /* - * Mask off conditions which should be ignored. - */ - *status &= up->port.read_status_mask; - -#ifdef CONFIG_SERIAL_PXA_CONSOLE - if (up->port.line == up->port.cons->index) { - /* Recover the break flag from console xmit */ - *status |= up->lsr_break_flag; - up->lsr_break_flag = 0; - } -#endif - if (*status & UART_LSR_BI) { - flag = TTY_BREAK; - } else if (*status & UART_LSR_PE) - flag = TTY_PARITY; - else if (*status & UART_LSR_FE) - flag = TTY_FRAME; - } - - if (uart_handle_sysrq_char(&up->port, ch)) - goto ignore_char; - - uart_insert_char(&up->port, *status, UART_LSR_OE, ch, flag); - - ignore_char: - *status = serial_in(up, UART_LSR); - } while ((*status & UART_LSR_DR) && (max_count-- > 0)); - tty_flip_buffer_push(tty); -} - -static void transmit_chars(struct uart_pxa_port *up) -{ - struct circ_buf *xmit = &up->port.state->xmit; - int count; - - if (up->port.x_char) { - serial_out(up, UART_TX, up->port.x_char); - up->port.icount.tx++; - up->port.x_char = 0; - return; - } - if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) { - serial_pxa_stop_tx(&up->port); - return; - } - - count = up->port.fifosize / 2; - do { - serial_out(up, UART_TX, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - up->port.icount.tx++; - if (uart_circ_empty(xmit)) - break; - } while (--count > 0); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&up->port); - - - if (uart_circ_empty(xmit)) - serial_pxa_stop_tx(&up->port); -} - -static void serial_pxa_start_tx(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - - if (!(up->ier & UART_IER_THRI)) { - up->ier |= UART_IER_THRI; - serial_out(up, UART_IER, up->ier); - } -} - -static inline void check_modem_status(struct uart_pxa_port *up) -{ - int status; - - status = serial_in(up, UART_MSR); - - if ((status & UART_MSR_ANY_DELTA) == 0) - return; - - if (status & UART_MSR_TERI) - up->port.icount.rng++; - if (status & UART_MSR_DDSR) - up->port.icount.dsr++; - if (status & UART_MSR_DDCD) - uart_handle_dcd_change(&up->port, status & UART_MSR_DCD); - if (status & UART_MSR_DCTS) - uart_handle_cts_change(&up->port, status & UART_MSR_CTS); - - wake_up_interruptible(&up->port.state->port.delta_msr_wait); -} - -/* - * This handles the interrupt from one port. - */ -static inline irqreturn_t serial_pxa_irq(int irq, void *dev_id) -{ - struct uart_pxa_port *up = dev_id; - unsigned int iir, lsr; - - iir = serial_in(up, UART_IIR); - if (iir & UART_IIR_NO_INT) - return IRQ_NONE; - lsr = serial_in(up, UART_LSR); - if (lsr & UART_LSR_DR) - receive_chars(up, &lsr); - check_modem_status(up); - if (lsr & UART_LSR_THRE) - transmit_chars(up); - return IRQ_HANDLED; -} - -static unsigned int serial_pxa_tx_empty(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - unsigned long flags; - unsigned int ret; - - spin_lock_irqsave(&up->port.lock, flags); - ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0; - spin_unlock_irqrestore(&up->port.lock, flags); - - return ret; -} - -static unsigned int serial_pxa_get_mctrl(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - unsigned char status; - unsigned int ret; - - status = serial_in(up, UART_MSR); - - ret = 0; - if (status & UART_MSR_DCD) - ret |= TIOCM_CAR; - if (status & UART_MSR_RI) - ret |= TIOCM_RNG; - if (status & UART_MSR_DSR) - ret |= TIOCM_DSR; - if (status & UART_MSR_CTS) - ret |= TIOCM_CTS; - return ret; -} - -static void serial_pxa_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - unsigned char mcr = 0; - - if (mctrl & TIOCM_RTS) - mcr |= UART_MCR_RTS; - if (mctrl & TIOCM_DTR) - mcr |= UART_MCR_DTR; - if (mctrl & TIOCM_OUT1) - mcr |= UART_MCR_OUT1; - if (mctrl & TIOCM_OUT2) - mcr |= UART_MCR_OUT2; - if (mctrl & TIOCM_LOOP) - mcr |= UART_MCR_LOOP; - - mcr |= up->mcr; - - serial_out(up, UART_MCR, mcr); -} - -static void serial_pxa_break_ctl(struct uart_port *port, int break_state) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - unsigned long flags; - - spin_lock_irqsave(&up->port.lock, flags); - if (break_state == -1) - up->lcr |= UART_LCR_SBC; - else - up->lcr &= ~UART_LCR_SBC; - serial_out(up, UART_LCR, up->lcr); - spin_unlock_irqrestore(&up->port.lock, flags); -} - -#if 0 -static void serial_pxa_dma_init(struct pxa_uart *up) -{ - up->rxdma = - pxa_request_dma(up->name, DMA_PRIO_LOW, pxa_receive_dma, up); - if (up->rxdma < 0) - goto out; - up->txdma = - pxa_request_dma(up->name, DMA_PRIO_LOW, pxa_transmit_dma, up); - if (up->txdma < 0) - goto err_txdma; - up->dmadesc = kmalloc(4 * sizeof(pxa_dma_desc), GFP_KERNEL); - if (!up->dmadesc) - goto err_alloc; - - /* ... */ -err_alloc: - pxa_free_dma(up->txdma); -err_rxdma: - pxa_free_dma(up->rxdma); -out: - return; -} -#endif - -static int serial_pxa_startup(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - unsigned long flags; - int retval; - - if (port->line == 3) /* HWUART */ - up->mcr |= UART_MCR_AFE; - else - up->mcr = 0; - - up->port.uartclk = clk_get_rate(up->clk); - - /* - * Allocate the IRQ - */ - retval = request_irq(up->port.irq, serial_pxa_irq, 0, up->name, up); - if (retval) - return retval; - - /* - * Clear the FIFO buffers and disable them. - * (they will be reenabled in set_termios()) - */ - serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); - serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | - UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); - serial_out(up, UART_FCR, 0); - - /* - * Clear the interrupt registers. - */ - (void) serial_in(up, UART_LSR); - (void) serial_in(up, UART_RX); - (void) serial_in(up, UART_IIR); - (void) serial_in(up, UART_MSR); - - /* - * Now, initialize the UART - */ - serial_out(up, UART_LCR, UART_LCR_WLEN8); - - spin_lock_irqsave(&up->port.lock, flags); - up->port.mctrl |= TIOCM_OUT2; - serial_pxa_set_mctrl(&up->port, up->port.mctrl); - spin_unlock_irqrestore(&up->port.lock, flags); - - /* - * Finally, enable interrupts. Note: Modem status interrupts - * are set via set_termios(), which will be occurring imminently - * anyway, so we don't enable them here. - */ - up->ier = UART_IER_RLSI | UART_IER_RDI | UART_IER_RTOIE | UART_IER_UUE; - serial_out(up, UART_IER, up->ier); - - /* - * And clear the interrupt registers again for luck. - */ - (void) serial_in(up, UART_LSR); - (void) serial_in(up, UART_RX); - (void) serial_in(up, UART_IIR); - (void) serial_in(up, UART_MSR); - - return 0; -} - -static void serial_pxa_shutdown(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - unsigned long flags; - - free_irq(up->port.irq, up); - - /* - * Disable interrupts from this port - */ - up->ier = 0; - serial_out(up, UART_IER, 0); - - spin_lock_irqsave(&up->port.lock, flags); - up->port.mctrl &= ~TIOCM_OUT2; - serial_pxa_set_mctrl(&up->port, up->port.mctrl); - spin_unlock_irqrestore(&up->port.lock, flags); - - /* - * Disable break condition and FIFOs - */ - serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC); - serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | - UART_FCR_CLEAR_RCVR | - UART_FCR_CLEAR_XMIT); - serial_out(up, UART_FCR, 0); -} - -static void -serial_pxa_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - unsigned char cval, fcr = 0; - unsigned long flags; - unsigned int baud, quot; - unsigned int dll; - - switch (termios->c_cflag & CSIZE) { - case CS5: - cval = UART_LCR_WLEN5; - break; - case CS6: - cval = UART_LCR_WLEN6; - break; - case CS7: - cval = UART_LCR_WLEN7; - break; - default: - case CS8: - cval = UART_LCR_WLEN8; - break; - } - - if (termios->c_cflag & CSTOPB) - cval |= UART_LCR_STOP; - if (termios->c_cflag & PARENB) - cval |= UART_LCR_PARITY; - if (!(termios->c_cflag & PARODD)) - cval |= UART_LCR_EPAR; - - /* - * Ask the core to calculate the divisor for us. - */ - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); - quot = uart_get_divisor(port, baud); - - if ((up->port.uartclk / quot) < (2400 * 16)) - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR1; - else if ((up->port.uartclk / quot) < (230400 * 16)) - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR8; - else - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR32; - - /* - * Ok, we're now changing the port state. Do it with - * interrupts disabled. - */ - spin_lock_irqsave(&up->port.lock, flags); - - /* - * Ensure the port will be enabled. - * This is required especially for serial console. - */ - up->ier |= UART_IER_UUE; - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; - if (termios->c_iflag & INPCK) - up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; - if (termios->c_iflag & (BRKINT | PARMRK)) - up->port.read_status_mask |= UART_LSR_BI; - - /* - * Characters to ignore - */ - up->port.ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; - if (termios->c_iflag & IGNBRK) { - up->port.ignore_status_mask |= UART_LSR_BI; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - up->port.ignore_status_mask |= UART_LSR_OE; - } - - /* - * ignore all characters if CREAD is not set - */ - if ((termios->c_cflag & CREAD) == 0) - up->port.ignore_status_mask |= UART_LSR_DR; - - /* - * CTS flow control flag and modem status interrupts - */ - up->ier &= ~UART_IER_MSI; - if (UART_ENABLE_MS(&up->port, termios->c_cflag)) - up->ier |= UART_IER_MSI; - - serial_out(up, UART_IER, up->ier); - - if (termios->c_cflag & CRTSCTS) - up->mcr |= UART_MCR_AFE; - else - up->mcr &= ~UART_MCR_AFE; - - serial_out(up, UART_LCR, cval | UART_LCR_DLAB); /* set DLAB */ - serial_out(up, UART_DLL, quot & 0xff); /* LS of divisor */ - - /* - * work around Errata #75 according to Intel(R) PXA27x Processor Family - * Specification Update (Nov 2005) - */ - dll = serial_in(up, UART_DLL); - WARN_ON(dll != (quot & 0xff)); - - serial_out(up, UART_DLM, quot >> 8); /* MS of divisor */ - serial_out(up, UART_LCR, cval); /* reset DLAB */ - up->lcr = cval; /* Save LCR */ - serial_pxa_set_mctrl(&up->port, up->port.mctrl); - serial_out(up, UART_FCR, fcr); - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static void -serial_pxa_pm(struct uart_port *port, unsigned int state, - unsigned int oldstate) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - - if (!state) - clk_enable(up->clk); - else - clk_disable(up->clk); -} - -static void serial_pxa_release_port(struct uart_port *port) -{ -} - -static int serial_pxa_request_port(struct uart_port *port) -{ - return 0; -} - -static void serial_pxa_config_port(struct uart_port *port, int flags) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - up->port.type = PORT_PXA; -} - -static int -serial_pxa_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - /* we don't want the core code to modify any port params */ - return -EINVAL; -} - -static const char * -serial_pxa_type(struct uart_port *port) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - return up->name; -} - -static struct uart_pxa_port *serial_pxa_ports[4]; -static struct uart_driver serial_pxa_reg; - -#ifdef CONFIG_SERIAL_PXA_CONSOLE - -#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - -/* - * Wait for transmitter & holding register to empty - */ -static inline void wait_for_xmitr(struct uart_pxa_port *up) -{ - unsigned int status, tmout = 10000; - - /* Wait up to 10ms for the character(s) to be sent. */ - do { - status = serial_in(up, UART_LSR); - - if (status & UART_LSR_BI) - up->lsr_break_flag = UART_LSR_BI; - - if (--tmout == 0) - break; - udelay(1); - } while ((status & BOTH_EMPTY) != BOTH_EMPTY); - - /* Wait up to 1s for flow control if necessary */ - if (up->port.flags & UPF_CONS_FLOW) { - tmout = 1000000; - while (--tmout && - ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0)) - udelay(1); - } -} - -static void serial_pxa_console_putchar(struct uart_port *port, int ch) -{ - struct uart_pxa_port *up = (struct uart_pxa_port *)port; - - wait_for_xmitr(up); - serial_out(up, UART_TX, ch); -} - -/* - * Print a string to the serial port trying not to disturb - * any possible real use of the port... - * - * The console_lock must be held when we get here. - */ -static void -serial_pxa_console_write(struct console *co, const char *s, unsigned int count) -{ - struct uart_pxa_port *up = serial_pxa_ports[co->index]; - unsigned int ier; - - clk_enable(up->clk); - - /* - * First save the IER then disable the interrupts - */ - ier = serial_in(up, UART_IER); - serial_out(up, UART_IER, UART_IER_UUE); - - uart_console_write(&up->port, s, count, serial_pxa_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore the IER - */ - wait_for_xmitr(up); - serial_out(up, UART_IER, ier); - - clk_disable(up->clk); -} - -static int __init -serial_pxa_console_setup(struct console *co, char *options) -{ - struct uart_pxa_port *up; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - if (co->index == -1 || co->index >= serial_pxa_reg.nr) - co->index = 0; - up = serial_pxa_ports[co->index]; - if (!up) - return -ENODEV; - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(&up->port, co, baud, parity, bits, flow); -} - -static struct console serial_pxa_console = { - .name = "ttyS", - .write = serial_pxa_console_write, - .device = uart_console_device, - .setup = serial_pxa_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &serial_pxa_reg, -}; - -#define PXA_CONSOLE &serial_pxa_console -#else -#define PXA_CONSOLE NULL -#endif - -struct uart_ops serial_pxa_pops = { - .tx_empty = serial_pxa_tx_empty, - .set_mctrl = serial_pxa_set_mctrl, - .get_mctrl = serial_pxa_get_mctrl, - .stop_tx = serial_pxa_stop_tx, - .start_tx = serial_pxa_start_tx, - .stop_rx = serial_pxa_stop_rx, - .enable_ms = serial_pxa_enable_ms, - .break_ctl = serial_pxa_break_ctl, - .startup = serial_pxa_startup, - .shutdown = serial_pxa_shutdown, - .set_termios = serial_pxa_set_termios, - .pm = serial_pxa_pm, - .type = serial_pxa_type, - .release_port = serial_pxa_release_port, - .request_port = serial_pxa_request_port, - .config_port = serial_pxa_config_port, - .verify_port = serial_pxa_verify_port, -}; - -static struct uart_driver serial_pxa_reg = { - .owner = THIS_MODULE, - .driver_name = "PXA serial", - .dev_name = "ttyS", - .major = TTY_MAJOR, - .minor = 64, - .nr = 4, - .cons = PXA_CONSOLE, -}; - -#ifdef CONFIG_PM -static int serial_pxa_suspend(struct device *dev) -{ - struct uart_pxa_port *sport = dev_get_drvdata(dev); - - if (sport) - uart_suspend_port(&serial_pxa_reg, &sport->port); - - return 0; -} - -static int serial_pxa_resume(struct device *dev) -{ - struct uart_pxa_port *sport = dev_get_drvdata(dev); - - if (sport) - uart_resume_port(&serial_pxa_reg, &sport->port); - - return 0; -} - -static const struct dev_pm_ops serial_pxa_pm_ops = { - .suspend = serial_pxa_suspend, - .resume = serial_pxa_resume, -}; -#endif - -static int serial_pxa_probe(struct platform_device *dev) -{ - struct uart_pxa_port *sport; - struct resource *mmres, *irqres; - int ret; - - mmres = platform_get_resource(dev, IORESOURCE_MEM, 0); - irqres = platform_get_resource(dev, IORESOURCE_IRQ, 0); - if (!mmres || !irqres) - return -ENODEV; - - sport = kzalloc(sizeof(struct uart_pxa_port), GFP_KERNEL); - if (!sport) - return -ENOMEM; - - sport->clk = clk_get(&dev->dev, NULL); - if (IS_ERR(sport->clk)) { - ret = PTR_ERR(sport->clk); - goto err_free; - } - - sport->port.type = PORT_PXA; - sport->port.iotype = UPIO_MEM; - sport->port.mapbase = mmres->start; - sport->port.irq = irqres->start; - sport->port.fifosize = 64; - sport->port.ops = &serial_pxa_pops; - sport->port.line = dev->id; - sport->port.dev = &dev->dev; - sport->port.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF; - sport->port.uartclk = clk_get_rate(sport->clk); - - switch (dev->id) { - case 0: sport->name = "FFUART"; break; - case 1: sport->name = "BTUART"; break; - case 2: sport->name = "STUART"; break; - case 3: sport->name = "HWUART"; break; - default: - sport->name = "???"; - break; - } - - sport->port.membase = ioremap(mmres->start, mmres->end - mmres->start + 1); - if (!sport->port.membase) { - ret = -ENOMEM; - goto err_clk; - } - - serial_pxa_ports[dev->id] = sport; - - uart_add_one_port(&serial_pxa_reg, &sport->port); - platform_set_drvdata(dev, sport); - - return 0; - - err_clk: - clk_put(sport->clk); - err_free: - kfree(sport); - return ret; -} - -static int serial_pxa_remove(struct platform_device *dev) -{ - struct uart_pxa_port *sport = platform_get_drvdata(dev); - - platform_set_drvdata(dev, NULL); - - uart_remove_one_port(&serial_pxa_reg, &sport->port); - clk_put(sport->clk); - kfree(sport); - - return 0; -} - -static struct platform_driver serial_pxa_driver = { - .probe = serial_pxa_probe, - .remove = serial_pxa_remove, - - .driver = { - .name = "pxa2xx-uart", - .owner = THIS_MODULE, -#ifdef CONFIG_PM - .pm = &serial_pxa_pm_ops, -#endif - }, -}; - -int __init serial_pxa_init(void) -{ - int ret; - - ret = uart_register_driver(&serial_pxa_reg); - if (ret != 0) - return ret; - - ret = platform_driver_register(&serial_pxa_driver); - if (ret != 0) - uart_unregister_driver(&serial_pxa_reg); - - return ret; -} - -void __exit serial_pxa_exit(void) -{ - platform_driver_unregister(&serial_pxa_driver); - uart_unregister_driver(&serial_pxa_reg); -} - -module_init(serial_pxa_init); -module_exit(serial_pxa_exit); - -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:pxa2xx-uart"); diff --git a/drivers/serial/s3c2400.c b/drivers/serial/s3c2400.c deleted file mode 100644 index fed1a9a1ffb4..000000000000 --- a/drivers/serial/s3c2400.c +++ /dev/null @@ -1,106 +0,0 @@ -/* linux/drivers/serial/s3c240.c - * - * Driver for Samsung SoC onboard UARTs. - * - * Ben Dooks, Copyright (c) 2003-2005 Simtec Electronics - * http://armlinux.simtec.co.uk/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. -*/ - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/io.h> -#include <linux/platform_device.h> - -#include <asm/irq.h> - -#include <mach/hardware.h> - -#include <plat/regs-serial.h> -#include <mach/regs-gpio.h> - -#include "samsung.h" - -static int s3c2400_serial_getsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - clk->divisor = 1; - clk->name = "pclk"; - - return 0; -} - -static int s3c2400_serial_setsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - return 0; -} - -static int s3c2400_serial_resetport(struct uart_port *port, - struct s3c2410_uartcfg *cfg) -{ - dbg("s3c2400_serial_resetport: port=%p (%08lx), cfg=%p\n", - port, port->mapbase, cfg); - - wr_regl(port, S3C2410_UCON, cfg->ucon); - wr_regl(port, S3C2410_ULCON, cfg->ulcon); - - /* reset both fifos */ - - wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH); - wr_regl(port, S3C2410_UFCON, cfg->ufcon); - - return 0; -} - -static struct s3c24xx_uart_info s3c2400_uart_inf = { - .name = "Samsung S3C2400 UART", - .type = PORT_S3C2400, - .fifosize = 16, - .rx_fifomask = S3C2410_UFSTAT_RXMASK, - .rx_fifoshift = S3C2410_UFSTAT_RXSHIFT, - .rx_fifofull = S3C2410_UFSTAT_RXFULL, - .tx_fifofull = S3C2410_UFSTAT_TXFULL, - .tx_fifomask = S3C2410_UFSTAT_TXMASK, - .tx_fifoshift = S3C2410_UFSTAT_TXSHIFT, - .get_clksrc = s3c2400_serial_getsource, - .set_clksrc = s3c2400_serial_setsource, - .reset_port = s3c2400_serial_resetport, -}; - -static int s3c2400_serial_probe(struct platform_device *dev) -{ - return s3c24xx_serial_probe(dev, &s3c2400_uart_inf); -} - -static struct platform_driver s3c2400_serial_driver = { - .probe = s3c2400_serial_probe, - .remove = __devexit_p(s3c24xx_serial_remove), - .driver = { - .name = "s3c2400-uart", - .owner = THIS_MODULE, - }, -}; - -s3c24xx_console_init(&s3c2400_serial_driver, &s3c2400_uart_inf); - -static inline int s3c2400_serial_init(void) -{ - return s3c24xx_serial_init(&s3c2400_serial_driver, &s3c2400_uart_inf); -} - -static inline void s3c2400_serial_exit(void) -{ - platform_driver_unregister(&s3c2400_serial_driver); -} - -module_init(s3c2400_serial_init); -module_exit(s3c2400_serial_exit); - -MODULE_LICENSE("GPL v2"); -MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); -MODULE_DESCRIPTION("Samsung S3C2400 SoC Serial port driver"); -MODULE_ALIAS("platform:s3c2400-uart"); diff --git a/drivers/serial/s3c2410.c b/drivers/serial/s3c2410.c deleted file mode 100644 index 73f089d3efd6..000000000000 --- a/drivers/serial/s3c2410.c +++ /dev/null @@ -1,118 +0,0 @@ -/* linux/drivers/serial/s3c2410.c - * - * Driver for Samsung S3C2410 SoC onboard UARTs. - * - * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics - * http://armlinux.simtec.co.uk/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. -*/ - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/io.h> -#include <linux/platform_device.h> -#include <linux/init.h> -#include <linux/serial_core.h> -#include <linux/serial.h> - -#include <asm/irq.h> -#include <mach/hardware.h> - -#include <plat/regs-serial.h> -#include <mach/regs-gpio.h> - -#include "samsung.h" - -static int s3c2410_serial_setsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - if (strcmp(clk->name, "uclk") == 0) - ucon |= S3C2410_UCON_UCLK; - else - ucon &= ~S3C2410_UCON_UCLK; - - wr_regl(port, S3C2410_UCON, ucon); - return 0; -} - -static int s3c2410_serial_getsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - clk->divisor = 1; - clk->name = (ucon & S3C2410_UCON_UCLK) ? "uclk" : "pclk"; - - return 0; -} - -static int s3c2410_serial_resetport(struct uart_port *port, - struct s3c2410_uartcfg *cfg) -{ - dbg("s3c2410_serial_resetport: port=%p (%08lx), cfg=%p\n", - port, port->mapbase, cfg); - - wr_regl(port, S3C2410_UCON, cfg->ucon); - wr_regl(port, S3C2410_ULCON, cfg->ulcon); - - /* reset both fifos */ - - wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH); - wr_regl(port, S3C2410_UFCON, cfg->ufcon); - - return 0; -} - -static struct s3c24xx_uart_info s3c2410_uart_inf = { - .name = "Samsung S3C2410 UART", - .type = PORT_S3C2410, - .fifosize = 16, - .rx_fifomask = S3C2410_UFSTAT_RXMASK, - .rx_fifoshift = S3C2410_UFSTAT_RXSHIFT, - .rx_fifofull = S3C2410_UFSTAT_RXFULL, - .tx_fifofull = S3C2410_UFSTAT_TXFULL, - .tx_fifomask = S3C2410_UFSTAT_TXMASK, - .tx_fifoshift = S3C2410_UFSTAT_TXSHIFT, - .get_clksrc = s3c2410_serial_getsource, - .set_clksrc = s3c2410_serial_setsource, - .reset_port = s3c2410_serial_resetport, -}; - -static int s3c2410_serial_probe(struct platform_device *dev) -{ - return s3c24xx_serial_probe(dev, &s3c2410_uart_inf); -} - -static struct platform_driver s3c2410_serial_driver = { - .probe = s3c2410_serial_probe, - .remove = __devexit_p(s3c24xx_serial_remove), - .driver = { - .name = "s3c2410-uart", - .owner = THIS_MODULE, - }, -}; - -s3c24xx_console_init(&s3c2410_serial_driver, &s3c2410_uart_inf); - -static int __init s3c2410_serial_init(void) -{ - return s3c24xx_serial_init(&s3c2410_serial_driver, &s3c2410_uart_inf); -} - -static void __exit s3c2410_serial_exit(void) -{ - platform_driver_unregister(&s3c2410_serial_driver); -} - -module_init(s3c2410_serial_init); -module_exit(s3c2410_serial_exit); - -MODULE_LICENSE("GPL v2"); -MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); -MODULE_DESCRIPTION("Samsung S3C2410 SoC Serial port driver"); -MODULE_ALIAS("platform:s3c2410-uart"); diff --git a/drivers/serial/s3c2412.c b/drivers/serial/s3c2412.c deleted file mode 100644 index 1700b1a2fb7e..000000000000 --- a/drivers/serial/s3c2412.c +++ /dev/null @@ -1,152 +0,0 @@ -/* linux/drivers/serial/s3c2412.c - * - * Driver for Samsung S3C2412 and S3C2413 SoC onboard UARTs. - * - * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics - * http://armlinux.simtec.co.uk/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. -*/ - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/io.h> -#include <linux/platform_device.h> -#include <linux/init.h> -#include <linux/serial_core.h> -#include <linux/serial.h> - -#include <asm/irq.h> -#include <mach/hardware.h> - -#include <plat/regs-serial.h> -#include <mach/regs-gpio.h> - -#include "samsung.h" - -static int s3c2412_serial_setsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - ucon &= ~S3C2412_UCON_CLKMASK; - - if (strcmp(clk->name, "uclk") == 0) - ucon |= S3C2440_UCON_UCLK; - else if (strcmp(clk->name, "pclk") == 0) - ucon |= S3C2440_UCON_PCLK; - else if (strcmp(clk->name, "usysclk") == 0) - ucon |= S3C2412_UCON_USYSCLK; - else { - printk(KERN_ERR "unknown clock source %s\n", clk->name); - return -EINVAL; - } - - wr_regl(port, S3C2410_UCON, ucon); - return 0; -} - - -static int s3c2412_serial_getsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - switch (ucon & S3C2412_UCON_CLKMASK) { - case S3C2412_UCON_UCLK: - clk->divisor = 1; - clk->name = "uclk"; - break; - - case S3C2412_UCON_PCLK: - case S3C2412_UCON_PCLK2: - clk->divisor = 1; - clk->name = "pclk"; - break; - - case S3C2412_UCON_USYSCLK: - clk->divisor = 1; - clk->name = "usysclk"; - break; - } - - return 0; -} - -static int s3c2412_serial_resetport(struct uart_port *port, - struct s3c2410_uartcfg *cfg) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - dbg("%s: port=%p (%08lx), cfg=%p\n", - __func__, port, port->mapbase, cfg); - - /* ensure we don't change the clock settings... */ - - ucon &= S3C2412_UCON_CLKMASK; - - wr_regl(port, S3C2410_UCON, ucon | cfg->ucon); - wr_regl(port, S3C2410_ULCON, cfg->ulcon); - - /* reset both fifos */ - - wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH); - wr_regl(port, S3C2410_UFCON, cfg->ufcon); - - return 0; -} - -static struct s3c24xx_uart_info s3c2412_uart_inf = { - .name = "Samsung S3C2412 UART", - .type = PORT_S3C2412, - .fifosize = 64, - .has_divslot = 1, - .rx_fifomask = S3C2440_UFSTAT_RXMASK, - .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT, - .rx_fifofull = S3C2440_UFSTAT_RXFULL, - .tx_fifofull = S3C2440_UFSTAT_TXFULL, - .tx_fifomask = S3C2440_UFSTAT_TXMASK, - .tx_fifoshift = S3C2440_UFSTAT_TXSHIFT, - .get_clksrc = s3c2412_serial_getsource, - .set_clksrc = s3c2412_serial_setsource, - .reset_port = s3c2412_serial_resetport, -}; - -/* device management */ - -static int s3c2412_serial_probe(struct platform_device *dev) -{ - dbg("s3c2440_serial_probe: dev=%p\n", dev); - return s3c24xx_serial_probe(dev, &s3c2412_uart_inf); -} - -static struct platform_driver s3c2412_serial_driver = { - .probe = s3c2412_serial_probe, - .remove = __devexit_p(s3c24xx_serial_remove), - .driver = { - .name = "s3c2412-uart", - .owner = THIS_MODULE, - }, -}; - -s3c24xx_console_init(&s3c2412_serial_driver, &s3c2412_uart_inf); - -static inline int s3c2412_serial_init(void) -{ - return s3c24xx_serial_init(&s3c2412_serial_driver, &s3c2412_uart_inf); -} - -static inline void s3c2412_serial_exit(void) -{ - platform_driver_unregister(&s3c2412_serial_driver); -} - -module_init(s3c2412_serial_init); -module_exit(s3c2412_serial_exit); - -MODULE_DESCRIPTION("Samsung S3C2412,S3C2413 SoC Serial port driver"); -MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:s3c2412-uart"); diff --git a/drivers/serial/s3c2440.c b/drivers/serial/s3c2440.c deleted file mode 100644 index 094cc3904b13..000000000000 --- a/drivers/serial/s3c2440.c +++ /dev/null @@ -1,181 +0,0 @@ -/* linux/drivers/serial/s3c2440.c - * - * Driver for Samsung S3C2440 and S3C2442 SoC onboard UARTs. - * - * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics - * http://armlinux.simtec.co.uk/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. -*/ - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/io.h> -#include <linux/platform_device.h> -#include <linux/init.h> -#include <linux/serial_core.h> -#include <linux/serial.h> - -#include <asm/irq.h> -#include <mach/hardware.h> - -#include <plat/regs-serial.h> -#include <mach/regs-gpio.h> - -#include "samsung.h" - - -static int s3c2440_serial_setsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - /* todo - proper fclk<>nonfclk switch. */ - - ucon &= ~S3C2440_UCON_CLKMASK; - - if (strcmp(clk->name, "uclk") == 0) - ucon |= S3C2440_UCON_UCLK; - else if (strcmp(clk->name, "pclk") == 0) - ucon |= S3C2440_UCON_PCLK; - else if (strcmp(clk->name, "fclk") == 0) - ucon |= S3C2440_UCON_FCLK; - else { - printk(KERN_ERR "unknown clock source %s\n", clk->name); - return -EINVAL; - } - - wr_regl(port, S3C2410_UCON, ucon); - return 0; -} - - -static int s3c2440_serial_getsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - unsigned long ucon0, ucon1, ucon2; - - switch (ucon & S3C2440_UCON_CLKMASK) { - case S3C2440_UCON_UCLK: - clk->divisor = 1; - clk->name = "uclk"; - break; - - case S3C2440_UCON_PCLK: - case S3C2440_UCON_PCLK2: - clk->divisor = 1; - clk->name = "pclk"; - break; - - case S3C2440_UCON_FCLK: - /* the fun of calculating the uart divisors on - * the s3c2440 */ - - ucon0 = __raw_readl(S3C24XX_VA_UART0 + S3C2410_UCON); - ucon1 = __raw_readl(S3C24XX_VA_UART1 + S3C2410_UCON); - ucon2 = __raw_readl(S3C24XX_VA_UART2 + S3C2410_UCON); - - printk("ucons: %08lx, %08lx, %08lx\n", ucon0, ucon1, ucon2); - - ucon0 &= S3C2440_UCON0_DIVMASK; - ucon1 &= S3C2440_UCON1_DIVMASK; - ucon2 &= S3C2440_UCON2_DIVMASK; - - if (ucon0 != 0) { - clk->divisor = ucon0 >> S3C2440_UCON_DIVSHIFT; - clk->divisor += 6; - } else if (ucon1 != 0) { - clk->divisor = ucon1 >> S3C2440_UCON_DIVSHIFT; - clk->divisor += 21; - } else if (ucon2 != 0) { - clk->divisor = ucon2 >> S3C2440_UCON_DIVSHIFT; - clk->divisor += 36; - } else { - /* manual calims 44, seems to be 9 */ - clk->divisor = 9; - } - - clk->name = "fclk"; - break; - } - - return 0; -} - -static int s3c2440_serial_resetport(struct uart_port *port, - struct s3c2410_uartcfg *cfg) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - dbg("s3c2440_serial_resetport: port=%p (%08lx), cfg=%p\n", - port, port->mapbase, cfg); - - /* ensure we don't change the clock settings... */ - - ucon &= (S3C2440_UCON0_DIVMASK | (3<<10)); - - wr_regl(port, S3C2410_UCON, ucon | cfg->ucon); - wr_regl(port, S3C2410_ULCON, cfg->ulcon); - - /* reset both fifos */ - - wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH); - wr_regl(port, S3C2410_UFCON, cfg->ufcon); - - return 0; -} - -static struct s3c24xx_uart_info s3c2440_uart_inf = { - .name = "Samsung S3C2440 UART", - .type = PORT_S3C2440, - .fifosize = 64, - .rx_fifomask = S3C2440_UFSTAT_RXMASK, - .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT, - .rx_fifofull = S3C2440_UFSTAT_RXFULL, - .tx_fifofull = S3C2440_UFSTAT_TXFULL, - .tx_fifomask = S3C2440_UFSTAT_TXMASK, - .tx_fifoshift = S3C2440_UFSTAT_TXSHIFT, - .get_clksrc = s3c2440_serial_getsource, - .set_clksrc = s3c2440_serial_setsource, - .reset_port = s3c2440_serial_resetport, -}; - -/* device management */ - -static int s3c2440_serial_probe(struct platform_device *dev) -{ - dbg("s3c2440_serial_probe: dev=%p\n", dev); - return s3c24xx_serial_probe(dev, &s3c2440_uart_inf); -} - -static struct platform_driver s3c2440_serial_driver = { - .probe = s3c2440_serial_probe, - .remove = __devexit_p(s3c24xx_serial_remove), - .driver = { - .name = "s3c2440-uart", - .owner = THIS_MODULE, - }, -}; - -s3c24xx_console_init(&s3c2440_serial_driver, &s3c2440_uart_inf); - -static int __init s3c2440_serial_init(void) -{ - return s3c24xx_serial_init(&s3c2440_serial_driver, &s3c2440_uart_inf); -} - -static void __exit s3c2440_serial_exit(void) -{ - platform_driver_unregister(&s3c2440_serial_driver); -} - -module_init(s3c2440_serial_init); -module_exit(s3c2440_serial_exit); - -MODULE_DESCRIPTION("Samsung S3C2440,S3C2442 SoC Serial port driver"); -MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:s3c2440-uart"); diff --git a/drivers/serial/s3c24a0.c b/drivers/serial/s3c24a0.c deleted file mode 100644 index fad6083ca427..000000000000 --- a/drivers/serial/s3c24a0.c +++ /dev/null @@ -1,118 +0,0 @@ -/* linux/drivers/serial/s3c24a0.c - * - * Driver for Samsung S3C24A0 SoC onboard UARTs. - * - * Based on drivers/serial/s3c2410.c - * - * Author: Sandeep Patil <sandeep.patil@azingo.com> - * - * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics - * http://armlinux.simtec.co.uk/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. -*/ - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/platform_device.h> -#include <linux/init.h> -#include <linux/serial_core.h> -#include <linux/serial.h> -#include <linux/io.h> -#include <linux/irq.h> - -#include <mach/hardware.h> - -#include <plat/regs-serial.h> -#include <mach/regs-gpio.h> - -#include "samsung.h" - -static int s3c24a0_serial_setsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - if (strcmp(clk->name, "uclk") == 0) - ucon |= S3C2410_UCON_UCLK; - else - ucon &= ~S3C2410_UCON_UCLK; - - wr_regl(port, S3C2410_UCON, ucon); - return 0; -} - -static int s3c24a0_serial_getsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - clk->divisor = 1; - clk->name = (ucon & S3C2410_UCON_UCLK) ? "uclk" : "pclk"; - - return 0; -} - -static int s3c24a0_serial_resetport(struct uart_port *port, - struct s3c2410_uartcfg *cfg) -{ - dbg("s3c24a0_serial_resetport: port=%p (%08lx), cfg=%p\n", - port, port->mapbase, cfg); - - wr_regl(port, S3C2410_UCON, cfg->ucon); - wr_regl(port, S3C2410_ULCON, cfg->ulcon); - - /* reset both fifos */ - - wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH); - wr_regl(port, S3C2410_UFCON, cfg->ufcon); - - return 0; -} - -static struct s3c24xx_uart_info s3c24a0_uart_inf = { - .name = "Samsung S3C24A0 UART", - .type = PORT_S3C2410, - .fifosize = 16, - .rx_fifomask = S3C24A0_UFSTAT_RXMASK, - .rx_fifoshift = S3C24A0_UFSTAT_RXSHIFT, - .rx_fifofull = S3C24A0_UFSTAT_RXFULL, - .tx_fifofull = S3C24A0_UFSTAT_TXFULL, - .tx_fifomask = S3C24A0_UFSTAT_TXMASK, - .tx_fifoshift = S3C24A0_UFSTAT_TXSHIFT, - .get_clksrc = s3c24a0_serial_getsource, - .set_clksrc = s3c24a0_serial_setsource, - .reset_port = s3c24a0_serial_resetport, -}; - -static int s3c24a0_serial_probe(struct platform_device *dev) -{ - return s3c24xx_serial_probe(dev, &s3c24a0_uart_inf); -} - -static struct platform_driver s3c24a0_serial_driver = { - .probe = s3c24a0_serial_probe, - .remove = __devexit_p(s3c24xx_serial_remove), - .driver = { - .name = "s3c24a0-uart", - .owner = THIS_MODULE, - }, -}; - -s3c24xx_console_init(&s3c24a0_serial_driver, &s3c24a0_uart_inf); - -static int __init s3c24a0_serial_init(void) -{ - return s3c24xx_serial_init(&s3c24a0_serial_driver, &s3c24a0_uart_inf); -} - -static void __exit s3c24a0_serial_exit(void) -{ - platform_driver_unregister(&s3c24a0_serial_driver); -} - -module_init(s3c24a0_serial_init); -module_exit(s3c24a0_serial_exit); - diff --git a/drivers/serial/s3c6400.c b/drivers/serial/s3c6400.c deleted file mode 100644 index 4be92ab50058..000000000000 --- a/drivers/serial/s3c6400.c +++ /dev/null @@ -1,152 +0,0 @@ -/* linux/drivers/serial/s3c6400.c - * - * Driver for Samsung S3C6400 and S3C6410 SoC onboard UARTs. - * - * Copyright 2008 Openmoko, Inc. - * Copyright 2008 Simtec Electronics - * Ben Dooks <ben@simtec.co.uk> - * http://armlinux.simtec.co.uk/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. -*/ - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/io.h> -#include <linux/platform_device.h> -#include <linux/init.h> -#include <linux/serial_core.h> -#include <linux/serial.h> - -#include <asm/irq.h> -#include <mach/hardware.h> - -#include <plat/regs-serial.h> - -#include "samsung.h" - -static int s3c6400_serial_setsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - if (strcmp(clk->name, "uclk0") == 0) { - ucon &= ~S3C6400_UCON_CLKMASK; - ucon |= S3C6400_UCON_UCLK0; - } else if (strcmp(clk->name, "uclk1") == 0) - ucon |= S3C6400_UCON_UCLK1; - else if (strcmp(clk->name, "pclk") == 0) { - /* See notes about transitioning from UCLK to PCLK */ - ucon &= ~S3C6400_UCON_UCLK0; - } else { - printk(KERN_ERR "unknown clock source %s\n", clk->name); - return -EINVAL; - } - - wr_regl(port, S3C2410_UCON, ucon); - return 0; -} - - -static int s3c6400_serial_getsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - u32 ucon = rd_regl(port, S3C2410_UCON); - - clk->divisor = 1; - - switch (ucon & S3C6400_UCON_CLKMASK) { - case S3C6400_UCON_UCLK0: - clk->name = "uclk0"; - break; - - case S3C6400_UCON_UCLK1: - clk->name = "uclk1"; - break; - - case S3C6400_UCON_PCLK: - case S3C6400_UCON_PCLK2: - clk->name = "pclk"; - break; - } - - return 0; -} - -static int s3c6400_serial_resetport(struct uart_port *port, - struct s3c2410_uartcfg *cfg) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - dbg("s3c6400_serial_resetport: port=%p (%08lx), cfg=%p\n", - port, port->mapbase, cfg); - - /* ensure we don't change the clock settings... */ - - ucon &= S3C6400_UCON_CLKMASK; - - wr_regl(port, S3C2410_UCON, ucon | cfg->ucon); - wr_regl(port, S3C2410_ULCON, cfg->ulcon); - - /* reset both fifos */ - - wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH); - wr_regl(port, S3C2410_UFCON, cfg->ufcon); - - return 0; -} - -static struct s3c24xx_uart_info s3c6400_uart_inf = { - .name = "Samsung S3C6400 UART", - .type = PORT_S3C6400, - .fifosize = 64, - .has_divslot = 1, - .rx_fifomask = S3C2440_UFSTAT_RXMASK, - .rx_fifoshift = S3C2440_UFSTAT_RXSHIFT, - .rx_fifofull = S3C2440_UFSTAT_RXFULL, - .tx_fifofull = S3C2440_UFSTAT_TXFULL, - .tx_fifomask = S3C2440_UFSTAT_TXMASK, - .tx_fifoshift = S3C2440_UFSTAT_TXSHIFT, - .get_clksrc = s3c6400_serial_getsource, - .set_clksrc = s3c6400_serial_setsource, - .reset_port = s3c6400_serial_resetport, -}; - -/* device management */ - -static int s3c6400_serial_probe(struct platform_device *dev) -{ - dbg("s3c6400_serial_probe: dev=%p\n", dev); - return s3c24xx_serial_probe(dev, &s3c6400_uart_inf); -} - -static struct platform_driver s3c6400_serial_driver = { - .probe = s3c6400_serial_probe, - .remove = __devexit_p(s3c24xx_serial_remove), - .driver = { - .name = "s3c6400-uart", - .owner = THIS_MODULE, - }, -}; - -s3c24xx_console_init(&s3c6400_serial_driver, &s3c6400_uart_inf); - -static int __init s3c6400_serial_init(void) -{ - return s3c24xx_serial_init(&s3c6400_serial_driver, &s3c6400_uart_inf); -} - -static void __exit s3c6400_serial_exit(void) -{ - platform_driver_unregister(&s3c6400_serial_driver); -} - -module_init(s3c6400_serial_init); -module_exit(s3c6400_serial_exit); - -MODULE_DESCRIPTION("Samsung S3C6400,S3C6410 SoC Serial port driver"); -MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:s3c6400-uart"); diff --git a/drivers/serial/s5pv210.c b/drivers/serial/s5pv210.c deleted file mode 100644 index 6ebccd70a707..000000000000 --- a/drivers/serial/s5pv210.c +++ /dev/null @@ -1,162 +0,0 @@ -/* linux/drivers/serial/s5pv210.c - * - * Copyright (c) 2010 Samsung Electronics Co., Ltd. - * http://www.samsung.com/ - * - * Based on drivers/serial/s3c6400.c - * - * Driver for Samsung S5PV210 SoC UARTs. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. -*/ - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/io.h> -#include <linux/platform_device.h> -#include <linux/init.h> -#include <linux/serial_core.h> -#include <linux/serial.h> - -#include <asm/irq.h> -#include <mach/hardware.h> -#include <plat/regs-serial.h> -#include "samsung.h" - -static int s5pv210_serial_setsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - struct s3c2410_uartcfg *cfg = port->dev->platform_data; - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - if ((cfg->clocks_size) == 1) - return 0; - - if (strcmp(clk->name, "pclk") == 0) - ucon &= ~S5PV210_UCON_CLKMASK; - else if (strcmp(clk->name, "uclk1") == 0) - ucon |= S5PV210_UCON_CLKMASK; - else { - printk(KERN_ERR "unknown clock source %s\n", clk->name); - return -EINVAL; - } - - wr_regl(port, S3C2410_UCON, ucon); - return 0; -} - - -static int s5pv210_serial_getsource(struct uart_port *port, - struct s3c24xx_uart_clksrc *clk) -{ - struct s3c2410_uartcfg *cfg = port->dev->platform_data; - u32 ucon = rd_regl(port, S3C2410_UCON); - - clk->divisor = 1; - - if ((cfg->clocks_size) == 1) - return 0; - - switch (ucon & S5PV210_UCON_CLKMASK) { - case S5PV210_UCON_PCLK: - clk->name = "pclk"; - break; - case S5PV210_UCON_UCLK: - clk->name = "uclk1"; - break; - } - - return 0; -} - -static int s5pv210_serial_resetport(struct uart_port *port, - struct s3c2410_uartcfg *cfg) -{ - unsigned long ucon = rd_regl(port, S3C2410_UCON); - - ucon &= S5PV210_UCON_CLKMASK; - wr_regl(port, S3C2410_UCON, ucon | cfg->ucon); - wr_regl(port, S3C2410_ULCON, cfg->ulcon); - - /* reset both fifos */ - wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH); - wr_regl(port, S3C2410_UFCON, cfg->ufcon); - - return 0; -} - -#define S5PV210_UART_DEFAULT_INFO(fifo_size) \ - .name = "Samsung S5PV210 UART0", \ - .type = PORT_S3C6400, \ - .fifosize = fifo_size, \ - .has_divslot = 1, \ - .rx_fifomask = S5PV210_UFSTAT_RXMASK, \ - .rx_fifoshift = S5PV210_UFSTAT_RXSHIFT, \ - .rx_fifofull = S5PV210_UFSTAT_RXFULL, \ - .tx_fifofull = S5PV210_UFSTAT_TXFULL, \ - .tx_fifomask = S5PV210_UFSTAT_TXMASK, \ - .tx_fifoshift = S5PV210_UFSTAT_TXSHIFT, \ - .get_clksrc = s5pv210_serial_getsource, \ - .set_clksrc = s5pv210_serial_setsource, \ - .reset_port = s5pv210_serial_resetport - -static struct s3c24xx_uart_info s5p_port_fifo256 = { - S5PV210_UART_DEFAULT_INFO(256), -}; - -static struct s3c24xx_uart_info s5p_port_fifo64 = { - S5PV210_UART_DEFAULT_INFO(64), -}; - -static struct s3c24xx_uart_info s5p_port_fifo16 = { - S5PV210_UART_DEFAULT_INFO(16), -}; - -static struct s3c24xx_uart_info *s5p_uart_inf[] = { - [0] = &s5p_port_fifo256, - [1] = &s5p_port_fifo64, - [2] = &s5p_port_fifo16, - [3] = &s5p_port_fifo16, -}; - -/* device management */ -static int s5p_serial_probe(struct platform_device *pdev) -{ - return s3c24xx_serial_probe(pdev, s5p_uart_inf[pdev->id]); -} - -static struct platform_driver s5p_serial_driver = { - .probe = s5p_serial_probe, - .remove = __devexit_p(s3c24xx_serial_remove), - .driver = { - .name = "s5pv210-uart", - .owner = THIS_MODULE, - }, -}; - -static int __init s5pv210_serial_console_init(void) -{ - return s3c24xx_serial_initconsole(&s5p_serial_driver, s5p_uart_inf); -} - -console_initcall(s5pv210_serial_console_init); - -static int __init s5p_serial_init(void) -{ - return s3c24xx_serial_init(&s5p_serial_driver, *s5p_uart_inf); -} - -static void __exit s5p_serial_exit(void) -{ - platform_driver_unregister(&s5p_serial_driver); -} - -module_init(s5p_serial_init); -module_exit(s5p_serial_exit); - -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:s5pv210-uart"); -MODULE_DESCRIPTION("Samsung S5PV210 UART Driver support"); -MODULE_AUTHOR("Thomas Abraham <thomas.ab@samsung.com>"); diff --git a/drivers/serial/sa1100.c b/drivers/serial/sa1100.c deleted file mode 100644 index 2199d819a987..000000000000 --- a/drivers/serial/sa1100.c +++ /dev/null @@ -1,918 +0,0 @@ -/* - * linux/drivers/char/sa1100.c - * - * Driver for SA11x0 serial ports - * - * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. - * - * Copyright (C) 2000 Deep Blue Solutions Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#if defined(CONFIG_SERIAL_SA1100_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/platform_device.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/serial.h> -#include <linux/io.h> - -#include <asm/irq.h> -#include <mach/hardware.h> -#include <asm/mach/serial_sa1100.h> - -/* We've been assigned a range on the "Low-density serial ports" major */ -#define SERIAL_SA1100_MAJOR 204 -#define MINOR_START 5 - -#define NR_PORTS 3 - -#define SA1100_ISR_PASS_LIMIT 256 - -/* - * Convert from ignore_status_mask or read_status_mask to UTSR[01] - */ -#define SM_TO_UTSR0(x) ((x) & 0xff) -#define SM_TO_UTSR1(x) ((x) >> 8) -#define UTSR0_TO_SM(x) ((x)) -#define UTSR1_TO_SM(x) ((x) << 8) - -#define UART_GET_UTCR0(sport) __raw_readl((sport)->port.membase + UTCR0) -#define UART_GET_UTCR1(sport) __raw_readl((sport)->port.membase + UTCR1) -#define UART_GET_UTCR2(sport) __raw_readl((sport)->port.membase + UTCR2) -#define UART_GET_UTCR3(sport) __raw_readl((sport)->port.membase + UTCR3) -#define UART_GET_UTSR0(sport) __raw_readl((sport)->port.membase + UTSR0) -#define UART_GET_UTSR1(sport) __raw_readl((sport)->port.membase + UTSR1) -#define UART_GET_CHAR(sport) __raw_readl((sport)->port.membase + UTDR) - -#define UART_PUT_UTCR0(sport,v) __raw_writel((v),(sport)->port.membase + UTCR0) -#define UART_PUT_UTCR1(sport,v) __raw_writel((v),(sport)->port.membase + UTCR1) -#define UART_PUT_UTCR2(sport,v) __raw_writel((v),(sport)->port.membase + UTCR2) -#define UART_PUT_UTCR3(sport,v) __raw_writel((v),(sport)->port.membase + UTCR3) -#define UART_PUT_UTSR0(sport,v) __raw_writel((v),(sport)->port.membase + UTSR0) -#define UART_PUT_UTSR1(sport,v) __raw_writel((v),(sport)->port.membase + UTSR1) -#define UART_PUT_CHAR(sport,v) __raw_writel((v),(sport)->port.membase + UTDR) - -/* - * This is the size of our serial port register set. - */ -#define UART_PORT_SIZE 0x24 - -/* - * This determines how often we check the modem status signals - * for any change. They generally aren't connected to an IRQ - * so we have to poll them. We also check immediately before - * filling the TX fifo incase CTS has been dropped. - */ -#define MCTRL_TIMEOUT (250*HZ/1000) - -struct sa1100_port { - struct uart_port port; - struct timer_list timer; - unsigned int old_status; -}; - -/* - * Handle any change of modem status signal since we were last called. - */ -static void sa1100_mctrl_check(struct sa1100_port *sport) -{ - unsigned int status, changed; - - status = sport->port.ops->get_mctrl(&sport->port); - changed = status ^ sport->old_status; - - if (changed == 0) - return; - - sport->old_status = status; - - if (changed & TIOCM_RI) - sport->port.icount.rng++; - if (changed & TIOCM_DSR) - sport->port.icount.dsr++; - if (changed & TIOCM_CAR) - uart_handle_dcd_change(&sport->port, status & TIOCM_CAR); - if (changed & TIOCM_CTS) - uart_handle_cts_change(&sport->port, status & TIOCM_CTS); - - wake_up_interruptible(&sport->port.state->port.delta_msr_wait); -} - -/* - * This is our per-port timeout handler, for checking the - * modem status signals. - */ -static void sa1100_timeout(unsigned long data) -{ - struct sa1100_port *sport = (struct sa1100_port *)data; - unsigned long flags; - - if (sport->port.state) { - spin_lock_irqsave(&sport->port.lock, flags); - sa1100_mctrl_check(sport); - spin_unlock_irqrestore(&sport->port.lock, flags); - - mod_timer(&sport->timer, jiffies + MCTRL_TIMEOUT); - } -} - -/* - * interrupts disabled on entry - */ -static void sa1100_stop_tx(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - u32 utcr3; - - utcr3 = UART_GET_UTCR3(sport); - UART_PUT_UTCR3(sport, utcr3 & ~UTCR3_TIE); - sport->port.read_status_mask &= ~UTSR0_TO_SM(UTSR0_TFS); -} - -/* - * port locked and interrupts disabled - */ -static void sa1100_start_tx(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - u32 utcr3; - - utcr3 = UART_GET_UTCR3(sport); - sport->port.read_status_mask |= UTSR0_TO_SM(UTSR0_TFS); - UART_PUT_UTCR3(sport, utcr3 | UTCR3_TIE); -} - -/* - * Interrupts enabled - */ -static void sa1100_stop_rx(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - u32 utcr3; - - utcr3 = UART_GET_UTCR3(sport); - UART_PUT_UTCR3(sport, utcr3 & ~UTCR3_RIE); -} - -/* - * Set the modem control timer to fire immediately. - */ -static void sa1100_enable_ms(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - - mod_timer(&sport->timer, jiffies); -} - -static void -sa1100_rx_chars(struct sa1100_port *sport) -{ - struct tty_struct *tty = sport->port.state->port.tty; - unsigned int status, ch, flg; - - status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) | - UTSR0_TO_SM(UART_GET_UTSR0(sport)); - while (status & UTSR1_TO_SM(UTSR1_RNE)) { - ch = UART_GET_CHAR(sport); - - sport->port.icount.rx++; - - flg = TTY_NORMAL; - - /* - * note that the error handling code is - * out of the main execution path - */ - if (status & UTSR1_TO_SM(UTSR1_PRE | UTSR1_FRE | UTSR1_ROR)) { - if (status & UTSR1_TO_SM(UTSR1_PRE)) - sport->port.icount.parity++; - else if (status & UTSR1_TO_SM(UTSR1_FRE)) - sport->port.icount.frame++; - if (status & UTSR1_TO_SM(UTSR1_ROR)) - sport->port.icount.overrun++; - - status &= sport->port.read_status_mask; - - if (status & UTSR1_TO_SM(UTSR1_PRE)) - flg = TTY_PARITY; - else if (status & UTSR1_TO_SM(UTSR1_FRE)) - flg = TTY_FRAME; - -#ifdef SUPPORT_SYSRQ - sport->port.sysrq = 0; -#endif - } - - if (uart_handle_sysrq_char(&sport->port, ch)) - goto ignore_char; - - uart_insert_char(&sport->port, status, UTSR1_TO_SM(UTSR1_ROR), ch, flg); - - ignore_char: - status = UTSR1_TO_SM(UART_GET_UTSR1(sport)) | - UTSR0_TO_SM(UART_GET_UTSR0(sport)); - } - tty_flip_buffer_push(tty); -} - -static void sa1100_tx_chars(struct sa1100_port *sport) -{ - struct circ_buf *xmit = &sport->port.state->xmit; - - if (sport->port.x_char) { - UART_PUT_CHAR(sport, sport->port.x_char); - sport->port.icount.tx++; - sport->port.x_char = 0; - return; - } - - /* - * Check the modem control lines before - * transmitting anything. - */ - sa1100_mctrl_check(sport); - - if (uart_circ_empty(xmit) || uart_tx_stopped(&sport->port)) { - sa1100_stop_tx(&sport->port); - return; - } - - /* - * Tried using FIFO (not checking TNF) for fifo fill: - * still had the '4 bytes repeated' problem. - */ - while (UART_GET_UTSR1(sport) & UTSR1_TNF) { - UART_PUT_CHAR(sport, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - sport->port.icount.tx++; - if (uart_circ_empty(xmit)) - break; - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&sport->port); - - if (uart_circ_empty(xmit)) - sa1100_stop_tx(&sport->port); -} - -static irqreturn_t sa1100_int(int irq, void *dev_id) -{ - struct sa1100_port *sport = dev_id; - unsigned int status, pass_counter = 0; - - spin_lock(&sport->port.lock); - status = UART_GET_UTSR0(sport); - status &= SM_TO_UTSR0(sport->port.read_status_mask) | ~UTSR0_TFS; - do { - if (status & (UTSR0_RFS | UTSR0_RID)) { - /* Clear the receiver idle bit, if set */ - if (status & UTSR0_RID) - UART_PUT_UTSR0(sport, UTSR0_RID); - sa1100_rx_chars(sport); - } - - /* Clear the relevant break bits */ - if (status & (UTSR0_RBB | UTSR0_REB)) - UART_PUT_UTSR0(sport, status & (UTSR0_RBB | UTSR0_REB)); - - if (status & UTSR0_RBB) - sport->port.icount.brk++; - - if (status & UTSR0_REB) - uart_handle_break(&sport->port); - - if (status & UTSR0_TFS) - sa1100_tx_chars(sport); - if (pass_counter++ > SA1100_ISR_PASS_LIMIT) - break; - status = UART_GET_UTSR0(sport); - status &= SM_TO_UTSR0(sport->port.read_status_mask) | - ~UTSR0_TFS; - } while (status & (UTSR0_TFS | UTSR0_RFS | UTSR0_RID)); - spin_unlock(&sport->port.lock); - - return IRQ_HANDLED; -} - -/* - * Return TIOCSER_TEMT when transmitter is not busy. - */ -static unsigned int sa1100_tx_empty(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - - return UART_GET_UTSR1(sport) & UTSR1_TBY ? 0 : TIOCSER_TEMT; -} - -static unsigned int sa1100_get_mctrl(struct uart_port *port) -{ - return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; -} - -static void sa1100_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ -} - -/* - * Interrupts always disabled. - */ -static void sa1100_break_ctl(struct uart_port *port, int break_state) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - unsigned long flags; - unsigned int utcr3; - - spin_lock_irqsave(&sport->port.lock, flags); - utcr3 = UART_GET_UTCR3(sport); - if (break_state == -1) - utcr3 |= UTCR3_BRK; - else - utcr3 &= ~UTCR3_BRK; - UART_PUT_UTCR3(sport, utcr3); - spin_unlock_irqrestore(&sport->port.lock, flags); -} - -static int sa1100_startup(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - int retval; - - /* - * Allocate the IRQ - */ - retval = request_irq(sport->port.irq, sa1100_int, 0, - "sa11x0-uart", sport); - if (retval) - return retval; - - /* - * Finally, clear and enable interrupts - */ - UART_PUT_UTSR0(sport, -1); - UART_PUT_UTCR3(sport, UTCR3_RXE | UTCR3_TXE | UTCR3_RIE); - - /* - * Enable modem status interrupts - */ - spin_lock_irq(&sport->port.lock); - sa1100_enable_ms(&sport->port); - spin_unlock_irq(&sport->port.lock); - - return 0; -} - -static void sa1100_shutdown(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - - /* - * Stop our timer. - */ - del_timer_sync(&sport->timer); - - /* - * Free the interrupt - */ - free_irq(sport->port.irq, sport); - - /* - * Disable all interrupts, port and break condition. - */ - UART_PUT_UTCR3(sport, 0); -} - -static void -sa1100_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - unsigned long flags; - unsigned int utcr0, old_utcr3, baud, quot; - unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8; - - /* - * We only support CS7 and CS8. - */ - while ((termios->c_cflag & CSIZE) != CS7 && - (termios->c_cflag & CSIZE) != CS8) { - termios->c_cflag &= ~CSIZE; - termios->c_cflag |= old_csize; - old_csize = CS8; - } - - if ((termios->c_cflag & CSIZE) == CS8) - utcr0 = UTCR0_DSS; - else - utcr0 = 0; - - if (termios->c_cflag & CSTOPB) - utcr0 |= UTCR0_SBS; - if (termios->c_cflag & PARENB) { - utcr0 |= UTCR0_PE; - if (!(termios->c_cflag & PARODD)) - utcr0 |= UTCR0_OES; - } - - /* - * Ask the core to calculate the divisor for us. - */ - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); - quot = uart_get_divisor(port, baud); - - spin_lock_irqsave(&sport->port.lock, flags); - - sport->port.read_status_mask &= UTSR0_TO_SM(UTSR0_TFS); - sport->port.read_status_mask |= UTSR1_TO_SM(UTSR1_ROR); - if (termios->c_iflag & INPCK) - sport->port.read_status_mask |= - UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE); - if (termios->c_iflag & (BRKINT | PARMRK)) - sport->port.read_status_mask |= - UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB); - - /* - * Characters to ignore - */ - sport->port.ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - sport->port.ignore_status_mask |= - UTSR1_TO_SM(UTSR1_FRE | UTSR1_PRE); - if (termios->c_iflag & IGNBRK) { - sport->port.ignore_status_mask |= - UTSR0_TO_SM(UTSR0_RBB | UTSR0_REB); - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - sport->port.ignore_status_mask |= - UTSR1_TO_SM(UTSR1_ROR); - } - - del_timer_sync(&sport->timer); - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - /* - * disable interrupts and drain transmitter - */ - old_utcr3 = UART_GET_UTCR3(sport); - UART_PUT_UTCR3(sport, old_utcr3 & ~(UTCR3_RIE | UTCR3_TIE)); - - while (UART_GET_UTSR1(sport) & UTSR1_TBY) - barrier(); - - /* then, disable everything */ - UART_PUT_UTCR3(sport, 0); - - /* set the parity, stop bits and data size */ - UART_PUT_UTCR0(sport, utcr0); - - /* set the baud rate */ - quot -= 1; - UART_PUT_UTCR1(sport, ((quot & 0xf00) >> 8)); - UART_PUT_UTCR2(sport, (quot & 0xff)); - - UART_PUT_UTSR0(sport, -1); - - UART_PUT_UTCR3(sport, old_utcr3); - - if (UART_ENABLE_MS(&sport->port, termios->c_cflag)) - sa1100_enable_ms(&sport->port); - - spin_unlock_irqrestore(&sport->port.lock, flags); -} - -static const char *sa1100_type(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - - return sport->port.type == PORT_SA1100 ? "SA1100" : NULL; -} - -/* - * Release the memory region(s) being used by 'port'. - */ -static void sa1100_release_port(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - - release_mem_region(sport->port.mapbase, UART_PORT_SIZE); -} - -/* - * Request the memory region(s) being used by 'port'. - */ -static int sa1100_request_port(struct uart_port *port) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - - return request_mem_region(sport->port.mapbase, UART_PORT_SIZE, - "sa11x0-uart") != NULL ? 0 : -EBUSY; -} - -/* - * Configure/autoconfigure the port. - */ -static void sa1100_config_port(struct uart_port *port, int flags) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - - if (flags & UART_CONFIG_TYPE && - sa1100_request_port(&sport->port) == 0) - sport->port.type = PORT_SA1100; -} - -/* - * Verify the new serial_struct (for TIOCSSERIAL). - * The only change we allow are to the flags and type, and - * even then only between PORT_SA1100 and PORT_UNKNOWN - */ -static int -sa1100_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - int ret = 0; - - if (ser->type != PORT_UNKNOWN && ser->type != PORT_SA1100) - ret = -EINVAL; - if (sport->port.irq != ser->irq) - ret = -EINVAL; - if (ser->io_type != SERIAL_IO_MEM) - ret = -EINVAL; - if (sport->port.uartclk / 16 != ser->baud_base) - ret = -EINVAL; - if ((void *)sport->port.mapbase != ser->iomem_base) - ret = -EINVAL; - if (sport->port.iobase != ser->port) - ret = -EINVAL; - if (ser->hub6 != 0) - ret = -EINVAL; - return ret; -} - -static struct uart_ops sa1100_pops = { - .tx_empty = sa1100_tx_empty, - .set_mctrl = sa1100_set_mctrl, - .get_mctrl = sa1100_get_mctrl, - .stop_tx = sa1100_stop_tx, - .start_tx = sa1100_start_tx, - .stop_rx = sa1100_stop_rx, - .enable_ms = sa1100_enable_ms, - .break_ctl = sa1100_break_ctl, - .startup = sa1100_startup, - .shutdown = sa1100_shutdown, - .set_termios = sa1100_set_termios, - .type = sa1100_type, - .release_port = sa1100_release_port, - .request_port = sa1100_request_port, - .config_port = sa1100_config_port, - .verify_port = sa1100_verify_port, -}; - -static struct sa1100_port sa1100_ports[NR_PORTS]; - -/* - * Setup the SA1100 serial ports. Note that we don't include the IrDA - * port here since we have our own SIR/FIR driver (see drivers/net/irda) - * - * Note also that we support "console=ttySAx" where "x" is either 0 or 1. - * Which serial port this ends up being depends on the machine you're - * running this kernel on. I'm not convinced that this is a good idea, - * but that's the way it traditionally works. - * - * Note that NanoEngine UART3 becomes UART2, and UART2 is no longer - * used here. - */ -static void __init sa1100_init_ports(void) -{ - static int first = 1; - int i; - - if (!first) - return; - first = 0; - - for (i = 0; i < NR_PORTS; i++) { - sa1100_ports[i].port.uartclk = 3686400; - sa1100_ports[i].port.ops = &sa1100_pops; - sa1100_ports[i].port.fifosize = 8; - sa1100_ports[i].port.line = i; - sa1100_ports[i].port.iotype = UPIO_MEM; - init_timer(&sa1100_ports[i].timer); - sa1100_ports[i].timer.function = sa1100_timeout; - sa1100_ports[i].timer.data = (unsigned long)&sa1100_ports[i]; - } - - /* - * make transmit lines outputs, so that when the port - * is closed, the output is in the MARK state. - */ - PPDR |= PPC_TXD1 | PPC_TXD3; - PPSR |= PPC_TXD1 | PPC_TXD3; -} - -void __devinit sa1100_register_uart_fns(struct sa1100_port_fns *fns) -{ - if (fns->get_mctrl) - sa1100_pops.get_mctrl = fns->get_mctrl; - if (fns->set_mctrl) - sa1100_pops.set_mctrl = fns->set_mctrl; - - sa1100_pops.pm = fns->pm; - sa1100_pops.set_wake = fns->set_wake; -} - -void __init sa1100_register_uart(int idx, int port) -{ - if (idx >= NR_PORTS) { - printk(KERN_ERR "%s: bad index number %d\n", __func__, idx); - return; - } - - switch (port) { - case 1: - sa1100_ports[idx].port.membase = (void __iomem *)&Ser1UTCR0; - sa1100_ports[idx].port.mapbase = _Ser1UTCR0; - sa1100_ports[idx].port.irq = IRQ_Ser1UART; - sa1100_ports[idx].port.flags = UPF_BOOT_AUTOCONF; - break; - - case 2: - sa1100_ports[idx].port.membase = (void __iomem *)&Ser2UTCR0; - sa1100_ports[idx].port.mapbase = _Ser2UTCR0; - sa1100_ports[idx].port.irq = IRQ_Ser2ICP; - sa1100_ports[idx].port.flags = UPF_BOOT_AUTOCONF; - break; - - case 3: - sa1100_ports[idx].port.membase = (void __iomem *)&Ser3UTCR0; - sa1100_ports[idx].port.mapbase = _Ser3UTCR0; - sa1100_ports[idx].port.irq = IRQ_Ser3UART; - sa1100_ports[idx].port.flags = UPF_BOOT_AUTOCONF; - break; - - default: - printk(KERN_ERR "%s: bad port number %d\n", __func__, port); - } -} - - -#ifdef CONFIG_SERIAL_SA1100_CONSOLE -static void sa1100_console_putchar(struct uart_port *port, int ch) -{ - struct sa1100_port *sport = (struct sa1100_port *)port; - - while (!(UART_GET_UTSR1(sport) & UTSR1_TNF)) - barrier(); - UART_PUT_CHAR(sport, ch); -} - -/* - * Interrupts are disabled on entering - */ -static void -sa1100_console_write(struct console *co, const char *s, unsigned int count) -{ - struct sa1100_port *sport = &sa1100_ports[co->index]; - unsigned int old_utcr3, status; - - /* - * First, save UTCR3 and then disable interrupts - */ - old_utcr3 = UART_GET_UTCR3(sport); - UART_PUT_UTCR3(sport, (old_utcr3 & ~(UTCR3_RIE | UTCR3_TIE)) | - UTCR3_TXE); - - uart_console_write(&sport->port, s, count, sa1100_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore UTCR3 - */ - do { - status = UART_GET_UTSR1(sport); - } while (status & UTSR1_TBY); - UART_PUT_UTCR3(sport, old_utcr3); -} - -/* - * If the port was already initialised (eg, by a boot loader), - * try to determine the current setup. - */ -static void __init -sa1100_console_get_options(struct sa1100_port *sport, int *baud, - int *parity, int *bits) -{ - unsigned int utcr3; - - utcr3 = UART_GET_UTCR3(sport) & (UTCR3_RXE | UTCR3_TXE); - if (utcr3 == (UTCR3_RXE | UTCR3_TXE)) { - /* ok, the port was enabled */ - unsigned int utcr0, quot; - - utcr0 = UART_GET_UTCR0(sport); - - *parity = 'n'; - if (utcr0 & UTCR0_PE) { - if (utcr0 & UTCR0_OES) - *parity = 'e'; - else - *parity = 'o'; - } - - if (utcr0 & UTCR0_DSS) - *bits = 8; - else - *bits = 7; - - quot = UART_GET_UTCR2(sport) | UART_GET_UTCR1(sport) << 8; - quot &= 0xfff; - *baud = sport->port.uartclk / (16 * (quot + 1)); - } -} - -static int __init -sa1100_console_setup(struct console *co, char *options) -{ - struct sa1100_port *sport; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - if (co->index == -1 || co->index >= NR_PORTS) - co->index = 0; - sport = &sa1100_ports[co->index]; - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - else - sa1100_console_get_options(sport, &baud, &parity, &bits); - - return uart_set_options(&sport->port, co, baud, parity, bits, flow); -} - -static struct uart_driver sa1100_reg; -static struct console sa1100_console = { - .name = "ttySA", - .write = sa1100_console_write, - .device = uart_console_device, - .setup = sa1100_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &sa1100_reg, -}; - -static int __init sa1100_rs_console_init(void) -{ - sa1100_init_ports(); - register_console(&sa1100_console); - return 0; -} -console_initcall(sa1100_rs_console_init); - -#define SA1100_CONSOLE &sa1100_console -#else -#define SA1100_CONSOLE NULL -#endif - -static struct uart_driver sa1100_reg = { - .owner = THIS_MODULE, - .driver_name = "ttySA", - .dev_name = "ttySA", - .major = SERIAL_SA1100_MAJOR, - .minor = MINOR_START, - .nr = NR_PORTS, - .cons = SA1100_CONSOLE, -}; - -static int sa1100_serial_suspend(struct platform_device *dev, pm_message_t state) -{ - struct sa1100_port *sport = platform_get_drvdata(dev); - - if (sport) - uart_suspend_port(&sa1100_reg, &sport->port); - - return 0; -} - -static int sa1100_serial_resume(struct platform_device *dev) -{ - struct sa1100_port *sport = platform_get_drvdata(dev); - - if (sport) - uart_resume_port(&sa1100_reg, &sport->port); - - return 0; -} - -static int sa1100_serial_probe(struct platform_device *dev) -{ - struct resource *res = dev->resource; - int i; - - for (i = 0; i < dev->num_resources; i++, res++) - if (res->flags & IORESOURCE_MEM) - break; - - if (i < dev->num_resources) { - for (i = 0; i < NR_PORTS; i++) { - if (sa1100_ports[i].port.mapbase != res->start) - continue; - - sa1100_ports[i].port.dev = &dev->dev; - uart_add_one_port(&sa1100_reg, &sa1100_ports[i].port); - platform_set_drvdata(dev, &sa1100_ports[i]); - break; - } - } - - return 0; -} - -static int sa1100_serial_remove(struct platform_device *pdev) -{ - struct sa1100_port *sport = platform_get_drvdata(pdev); - - platform_set_drvdata(pdev, NULL); - - if (sport) - uart_remove_one_port(&sa1100_reg, &sport->port); - - return 0; -} - -static struct platform_driver sa11x0_serial_driver = { - .probe = sa1100_serial_probe, - .remove = sa1100_serial_remove, - .suspend = sa1100_serial_suspend, - .resume = sa1100_serial_resume, - .driver = { - .name = "sa11x0-uart", - .owner = THIS_MODULE, - }, -}; - -static int __init sa1100_serial_init(void) -{ - int ret; - - printk(KERN_INFO "Serial: SA11x0 driver\n"); - - sa1100_init_ports(); - - ret = uart_register_driver(&sa1100_reg); - if (ret == 0) { - ret = platform_driver_register(&sa11x0_serial_driver); - if (ret) - uart_unregister_driver(&sa1100_reg); - } - return ret; -} - -static void __exit sa1100_serial_exit(void) -{ - platform_driver_unregister(&sa11x0_serial_driver); - uart_unregister_driver(&sa1100_reg); -} - -module_init(sa1100_serial_init); -module_exit(sa1100_serial_exit); - -MODULE_AUTHOR("Deep Blue Solutions Ltd"); -MODULE_DESCRIPTION("SA1100 generic serial port driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_CHARDEV_MAJOR(SERIAL_SA1100_MAJOR); -MODULE_ALIAS("platform:sa11x0-uart"); diff --git a/drivers/serial/samsung.c b/drivers/serial/samsung.c deleted file mode 100644 index 7ac2bf5167cd..000000000000 --- a/drivers/serial/samsung.c +++ /dev/null @@ -1,1487 +0,0 @@ -/* linux/drivers/serial/samsuing.c - * - * Driver core for Samsung SoC onboard UARTs. - * - * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics - * http://armlinux.simtec.co.uk/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. -*/ - -/* Hote on 2410 error handling - * - * The s3c2410 manual has a love/hate affair with the contents of the - * UERSTAT register in the UART blocks, and keeps marking some of the - * error bits as reserved. Having checked with the s3c2410x01, - * it copes with BREAKs properly, so I am happy to ignore the RESERVED - * feature from the latter versions of the manual. - * - * If it becomes aparrent that latter versions of the 2410 remove these - * bits, then action will have to be taken to differentiate the versions - * and change the policy on BREAK - * - * BJD, 04-Nov-2004 -*/ - -#if defined(CONFIG_SERIAL_SAMSUNG_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/io.h> -#include <linux/platform_device.h> -#include <linux/init.h> -#include <linux/sysrq.h> -#include <linux/console.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/serial.h> -#include <linux/delay.h> -#include <linux/clk.h> -#include <linux/cpufreq.h> - -#include <asm/irq.h> - -#include <mach/hardware.h> -#include <mach/map.h> - -#include <plat/regs-serial.h> - -#include "samsung.h" - -/* UART name and device definitions */ - -#define S3C24XX_SERIAL_NAME "ttySAC" -#define S3C24XX_SERIAL_MAJOR 204 -#define S3C24XX_SERIAL_MINOR 64 - -/* macros to change one thing to another */ - -#define tx_enabled(port) ((port)->unused[0]) -#define rx_enabled(port) ((port)->unused[1]) - -/* flag to ignore all characters comming in */ -#define RXSTAT_DUMMY_READ (0x10000000) - -static inline struct s3c24xx_uart_port *to_ourport(struct uart_port *port) -{ - return container_of(port, struct s3c24xx_uart_port, port); -} - -/* translate a port to the device name */ - -static inline const char *s3c24xx_serial_portname(struct uart_port *port) -{ - return to_platform_device(port->dev)->name; -} - -static int s3c24xx_serial_txempty_nofifo(struct uart_port *port) -{ - return (rd_regl(port, S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE); -} - -static void s3c24xx_serial_rx_enable(struct uart_port *port) -{ - unsigned long flags; - unsigned int ucon, ufcon; - int count = 10000; - - spin_lock_irqsave(&port->lock, flags); - - while (--count && !s3c24xx_serial_txempty_nofifo(port)) - udelay(100); - - ufcon = rd_regl(port, S3C2410_UFCON); - ufcon |= S3C2410_UFCON_RESETRX; - wr_regl(port, S3C2410_UFCON, ufcon); - - ucon = rd_regl(port, S3C2410_UCON); - ucon |= S3C2410_UCON_RXIRQMODE; - wr_regl(port, S3C2410_UCON, ucon); - - rx_enabled(port) = 1; - spin_unlock_irqrestore(&port->lock, flags); -} - -static void s3c24xx_serial_rx_disable(struct uart_port *port) -{ - unsigned long flags; - unsigned int ucon; - - spin_lock_irqsave(&port->lock, flags); - - ucon = rd_regl(port, S3C2410_UCON); - ucon &= ~S3C2410_UCON_RXIRQMODE; - wr_regl(port, S3C2410_UCON, ucon); - - rx_enabled(port) = 0; - spin_unlock_irqrestore(&port->lock, flags); -} - -static void s3c24xx_serial_stop_tx(struct uart_port *port) -{ - struct s3c24xx_uart_port *ourport = to_ourport(port); - - if (tx_enabled(port)) { - disable_irq_nosync(ourport->tx_irq); - tx_enabled(port) = 0; - if (port->flags & UPF_CONS_FLOW) - s3c24xx_serial_rx_enable(port); - } -} - -static void s3c24xx_serial_start_tx(struct uart_port *port) -{ - struct s3c24xx_uart_port *ourport = to_ourport(port); - - if (!tx_enabled(port)) { - if (port->flags & UPF_CONS_FLOW) - s3c24xx_serial_rx_disable(port); - - enable_irq(ourport->tx_irq); - tx_enabled(port) = 1; - } -} - - -static void s3c24xx_serial_stop_rx(struct uart_port *port) -{ - struct s3c24xx_uart_port *ourport = to_ourport(port); - - if (rx_enabled(port)) { - dbg("s3c24xx_serial_stop_rx: port=%p\n", port); - disable_irq_nosync(ourport->rx_irq); - rx_enabled(port) = 0; - } -} - -static void s3c24xx_serial_enable_ms(struct uart_port *port) -{ -} - -static inline struct s3c24xx_uart_info *s3c24xx_port_to_info(struct uart_port *port) -{ - return to_ourport(port)->info; -} - -static inline struct s3c2410_uartcfg *s3c24xx_port_to_cfg(struct uart_port *port) -{ - if (port->dev == NULL) - return NULL; - - return (struct s3c2410_uartcfg *)port->dev->platform_data; -} - -static int s3c24xx_serial_rx_fifocnt(struct s3c24xx_uart_port *ourport, - unsigned long ufstat) -{ - struct s3c24xx_uart_info *info = ourport->info; - - if (ufstat & info->rx_fifofull) - return info->fifosize; - - return (ufstat & info->rx_fifomask) >> info->rx_fifoshift; -} - - -/* ? - where has parity gone?? */ -#define S3C2410_UERSTAT_PARITY (0x1000) - -static irqreturn_t -s3c24xx_serial_rx_chars(int irq, void *dev_id) -{ - struct s3c24xx_uart_port *ourport = dev_id; - struct uart_port *port = &ourport->port; - struct tty_struct *tty = port->state->port.tty; - unsigned int ufcon, ch, flag, ufstat, uerstat; - int max_count = 64; - - while (max_count-- > 0) { - ufcon = rd_regl(port, S3C2410_UFCON); - ufstat = rd_regl(port, S3C2410_UFSTAT); - - if (s3c24xx_serial_rx_fifocnt(ourport, ufstat) == 0) - break; - - uerstat = rd_regl(port, S3C2410_UERSTAT); - ch = rd_regb(port, S3C2410_URXH); - - if (port->flags & UPF_CONS_FLOW) { - int txe = s3c24xx_serial_txempty_nofifo(port); - - if (rx_enabled(port)) { - if (!txe) { - rx_enabled(port) = 0; - continue; - } - } else { - if (txe) { - ufcon |= S3C2410_UFCON_RESETRX; - wr_regl(port, S3C2410_UFCON, ufcon); - rx_enabled(port) = 1; - goto out; - } - continue; - } - } - - /* insert the character into the buffer */ - - flag = TTY_NORMAL; - port->icount.rx++; - - if (unlikely(uerstat & S3C2410_UERSTAT_ANY)) { - dbg("rxerr: port ch=0x%02x, rxs=0x%08x\n", - ch, uerstat); - - /* check for break */ - if (uerstat & S3C2410_UERSTAT_BREAK) { - dbg("break!\n"); - port->icount.brk++; - if (uart_handle_break(port)) - goto ignore_char; - } - - if (uerstat & S3C2410_UERSTAT_FRAME) - port->icount.frame++; - if (uerstat & S3C2410_UERSTAT_OVERRUN) - port->icount.overrun++; - - uerstat &= port->read_status_mask; - - if (uerstat & S3C2410_UERSTAT_BREAK) - flag = TTY_BREAK; - else if (uerstat & S3C2410_UERSTAT_PARITY) - flag = TTY_PARITY; - else if (uerstat & (S3C2410_UERSTAT_FRAME | - S3C2410_UERSTAT_OVERRUN)) - flag = TTY_FRAME; - } - - if (uart_handle_sysrq_char(port, ch)) - goto ignore_char; - - uart_insert_char(port, uerstat, S3C2410_UERSTAT_OVERRUN, - ch, flag); - - ignore_char: - continue; - } - tty_flip_buffer_push(tty); - - out: - return IRQ_HANDLED; -} - -static irqreturn_t s3c24xx_serial_tx_chars(int irq, void *id) -{ - struct s3c24xx_uart_port *ourport = id; - struct uart_port *port = &ourport->port; - struct circ_buf *xmit = &port->state->xmit; - int count = 256; - - if (port->x_char) { - wr_regb(port, S3C2410_UTXH, port->x_char); - port->icount.tx++; - port->x_char = 0; - goto out; - } - - /* if there isnt anything more to transmit, or the uart is now - * stopped, disable the uart and exit - */ - - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - s3c24xx_serial_stop_tx(port); - goto out; - } - - /* try and drain the buffer... */ - - while (!uart_circ_empty(xmit) && count-- > 0) { - if (rd_regl(port, S3C2410_UFSTAT) & ourport->info->tx_fifofull) - break; - - wr_regb(port, S3C2410_UTXH, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (uart_circ_empty(xmit)) - s3c24xx_serial_stop_tx(port); - - out: - return IRQ_HANDLED; -} - -static unsigned int s3c24xx_serial_tx_empty(struct uart_port *port) -{ - struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - unsigned long ufstat = rd_regl(port, S3C2410_UFSTAT); - unsigned long ufcon = rd_regl(port, S3C2410_UFCON); - - if (ufcon & S3C2410_UFCON_FIFOMODE) { - if ((ufstat & info->tx_fifomask) != 0 || - (ufstat & info->tx_fifofull)) - return 0; - - return 1; - } - - return s3c24xx_serial_txempty_nofifo(port); -} - -/* no modem control lines */ -static unsigned int s3c24xx_serial_get_mctrl(struct uart_port *port) -{ - unsigned int umstat = rd_regb(port, S3C2410_UMSTAT); - - if (umstat & S3C2410_UMSTAT_CTS) - return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; - else - return TIOCM_CAR | TIOCM_DSR; -} - -static void s3c24xx_serial_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - /* todo - possibly remove AFC and do manual CTS */ -} - -static void s3c24xx_serial_break_ctl(struct uart_port *port, int break_state) -{ - unsigned long flags; - unsigned int ucon; - - spin_lock_irqsave(&port->lock, flags); - - ucon = rd_regl(port, S3C2410_UCON); - - if (break_state) - ucon |= S3C2410_UCON_SBREAK; - else - ucon &= ~S3C2410_UCON_SBREAK; - - wr_regl(port, S3C2410_UCON, ucon); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void s3c24xx_serial_shutdown(struct uart_port *port) -{ - struct s3c24xx_uart_port *ourport = to_ourport(port); - - if (ourport->tx_claimed) { - free_irq(ourport->tx_irq, ourport); - tx_enabled(port) = 0; - ourport->tx_claimed = 0; - } - - if (ourport->rx_claimed) { - free_irq(ourport->rx_irq, ourport); - ourport->rx_claimed = 0; - rx_enabled(port) = 0; - } -} - - -static int s3c24xx_serial_startup(struct uart_port *port) -{ - struct s3c24xx_uart_port *ourport = to_ourport(port); - int ret; - - dbg("s3c24xx_serial_startup: port=%p (%08lx,%p)\n", - port->mapbase, port->membase); - - rx_enabled(port) = 1; - - ret = request_irq(ourport->rx_irq, s3c24xx_serial_rx_chars, 0, - s3c24xx_serial_portname(port), ourport); - - if (ret != 0) { - printk(KERN_ERR "cannot get irq %d\n", ourport->rx_irq); - return ret; - } - - ourport->rx_claimed = 1; - - dbg("requesting tx irq...\n"); - - tx_enabled(port) = 1; - - ret = request_irq(ourport->tx_irq, s3c24xx_serial_tx_chars, 0, - s3c24xx_serial_portname(port), ourport); - - if (ret) { - printk(KERN_ERR "cannot get irq %d\n", ourport->tx_irq); - goto err; - } - - ourport->tx_claimed = 1; - - dbg("s3c24xx_serial_startup ok\n"); - - /* the port reset code should have done the correct - * register setup for the port controls */ - - return ret; - - err: - s3c24xx_serial_shutdown(port); - return ret; -} - -/* power power management control */ - -static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level, - unsigned int old) -{ - struct s3c24xx_uart_port *ourport = to_ourport(port); - - ourport->pm_level = level; - - switch (level) { - case 3: - if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL) - clk_disable(ourport->baudclk); - - clk_disable(ourport->clk); - break; - - case 0: - clk_enable(ourport->clk); - - if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL) - clk_enable(ourport->baudclk); - - break; - default: - printk(KERN_ERR "s3c24xx_serial: unknown pm %d\n", level); - } -} - -/* baud rate calculation - * - * The UARTs on the S3C2410/S3C2440 can take their clocks from a number - * of different sources, including the peripheral clock ("pclk") and an - * external clock ("uclk"). The S3C2440 also adds the core clock ("fclk") - * with a programmable extra divisor. - * - * The following code goes through the clock sources, and calculates the - * baud clocks (and the resultant actual baud rates) and then tries to - * pick the closest one and select that. - * -*/ - - -#define MAX_CLKS (8) - -static struct s3c24xx_uart_clksrc tmp_clksrc = { - .name = "pclk", - .min_baud = 0, - .max_baud = 0, - .divisor = 1, -}; - -static inline int -s3c24xx_serial_getsource(struct uart_port *port, struct s3c24xx_uart_clksrc *c) -{ - struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - - return (info->get_clksrc)(port, c); -} - -static inline int -s3c24xx_serial_setsource(struct uart_port *port, struct s3c24xx_uart_clksrc *c) -{ - struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - - return (info->set_clksrc)(port, c); -} - -struct baud_calc { - struct s3c24xx_uart_clksrc *clksrc; - unsigned int calc; - unsigned int divslot; - unsigned int quot; - struct clk *src; -}; - -static int s3c24xx_serial_calcbaud(struct baud_calc *calc, - struct uart_port *port, - struct s3c24xx_uart_clksrc *clksrc, - unsigned int baud) -{ - struct s3c24xx_uart_port *ourport = to_ourport(port); - unsigned long rate; - - calc->src = clk_get(port->dev, clksrc->name); - if (calc->src == NULL || IS_ERR(calc->src)) - return 0; - - rate = clk_get_rate(calc->src); - rate /= clksrc->divisor; - - calc->clksrc = clksrc; - - if (ourport->info->has_divslot) { - unsigned long div = rate / baud; - - /* The UDIVSLOT register on the newer UARTs allows us to - * get a divisor adjustment of 1/16th on the baud clock. - * - * We don't keep the UDIVSLOT value (the 16ths we calculated - * by not multiplying the baud by 16) as it is easy enough - * to recalculate. - */ - - calc->quot = div / 16; - calc->calc = rate / div; - } else { - calc->quot = (rate + (8 * baud)) / (16 * baud); - calc->calc = (rate / (calc->quot * 16)); - } - - calc->quot--; - return 1; -} - -static unsigned int s3c24xx_serial_getclk(struct uart_port *port, - struct s3c24xx_uart_clksrc **clksrc, - struct clk **clk, - unsigned int baud) -{ - struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port); - struct s3c24xx_uart_clksrc *clkp; - struct baud_calc res[MAX_CLKS]; - struct baud_calc *resptr, *best, *sptr; - int i; - - clkp = cfg->clocks; - best = NULL; - - if (cfg->clocks_size < 2) { - if (cfg->clocks_size == 0) - clkp = &tmp_clksrc; - - /* check to see if we're sourcing fclk, and if so we're - * going to have to update the clock source - */ - - if (strcmp(clkp->name, "fclk") == 0) { - struct s3c24xx_uart_clksrc src; - - s3c24xx_serial_getsource(port, &src); - - /* check that the port already using fclk, and if - * not, then re-select fclk - */ - - if (strcmp(src.name, clkp->name) == 0) { - s3c24xx_serial_setsource(port, clkp); - s3c24xx_serial_getsource(port, &src); - } - - clkp->divisor = src.divisor; - } - - s3c24xx_serial_calcbaud(res, port, clkp, baud); - best = res; - resptr = best + 1; - } else { - resptr = res; - - for (i = 0; i < cfg->clocks_size; i++, clkp++) { - if (s3c24xx_serial_calcbaud(resptr, port, clkp, baud)) - resptr++; - } - } - - /* ok, we now need to select the best clock we found */ - - if (!best) { - unsigned int deviation = (1<<30)|((1<<30)-1); - int calc_deviation; - - for (sptr = res; sptr < resptr; sptr++) { - calc_deviation = baud - sptr->calc; - if (calc_deviation < 0) - calc_deviation = -calc_deviation; - - if (calc_deviation < deviation) { - best = sptr; - deviation = calc_deviation; - } - } - } - - /* store results to pass back */ - - *clksrc = best->clksrc; - *clk = best->src; - - return best->quot; -} - -/* udivslot_table[] - * - * This table takes the fractional value of the baud divisor and gives - * the recommended setting for the UDIVSLOT register. - */ -static u16 udivslot_table[16] = { - [0] = 0x0000, - [1] = 0x0080, - [2] = 0x0808, - [3] = 0x0888, - [4] = 0x2222, - [5] = 0x4924, - [6] = 0x4A52, - [7] = 0x54AA, - [8] = 0x5555, - [9] = 0xD555, - [10] = 0xD5D5, - [11] = 0xDDD5, - [12] = 0xDDDD, - [13] = 0xDFDD, - [14] = 0xDFDF, - [15] = 0xFFDF, -}; - -static void s3c24xx_serial_set_termios(struct uart_port *port, - struct ktermios *termios, - struct ktermios *old) -{ - struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port); - struct s3c24xx_uart_port *ourport = to_ourport(port); - struct s3c24xx_uart_clksrc *clksrc = NULL; - struct clk *clk = NULL; - unsigned long flags; - unsigned int baud, quot; - unsigned int ulcon; - unsigned int umcon; - unsigned int udivslot = 0; - - /* - * We don't support modem control lines. - */ - termios->c_cflag &= ~(HUPCL | CMSPAR); - termios->c_cflag |= CLOCAL; - - /* - * Ask the core to calculate the divisor for us. - */ - - baud = uart_get_baud_rate(port, termios, old, 0, 115200*8); - - if (baud == 38400 && (port->flags & UPF_SPD_MASK) == UPF_SPD_CUST) - quot = port->custom_divisor; - else - quot = s3c24xx_serial_getclk(port, &clksrc, &clk, baud); - - /* check to see if we need to change clock source */ - - if (ourport->clksrc != clksrc || ourport->baudclk != clk) { - dbg("selecting clock %p\n", clk); - s3c24xx_serial_setsource(port, clksrc); - - if (ourport->baudclk != NULL && !IS_ERR(ourport->baudclk)) { - clk_disable(ourport->baudclk); - ourport->baudclk = NULL; - } - - clk_enable(clk); - - ourport->clksrc = clksrc; - ourport->baudclk = clk; - ourport->baudclk_rate = clk ? clk_get_rate(clk) : 0; - } - - if (ourport->info->has_divslot) { - unsigned int div = ourport->baudclk_rate / baud; - - if (cfg->has_fracval) { - udivslot = (div & 15); - dbg("fracval = %04x\n", udivslot); - } else { - udivslot = udivslot_table[div & 15]; - dbg("udivslot = %04x (div %d)\n", udivslot, div & 15); - } - } - - switch (termios->c_cflag & CSIZE) { - case CS5: - dbg("config: 5bits/char\n"); - ulcon = S3C2410_LCON_CS5; - break; - case CS6: - dbg("config: 6bits/char\n"); - ulcon = S3C2410_LCON_CS6; - break; - case CS7: - dbg("config: 7bits/char\n"); - ulcon = S3C2410_LCON_CS7; - break; - case CS8: - default: - dbg("config: 8bits/char\n"); - ulcon = S3C2410_LCON_CS8; - break; - } - - /* preserve original lcon IR settings */ - ulcon |= (cfg->ulcon & S3C2410_LCON_IRM); - - if (termios->c_cflag & CSTOPB) - ulcon |= S3C2410_LCON_STOPB; - - umcon = (termios->c_cflag & CRTSCTS) ? S3C2410_UMCOM_AFC : 0; - - if (termios->c_cflag & PARENB) { - if (termios->c_cflag & PARODD) - ulcon |= S3C2410_LCON_PODD; - else - ulcon |= S3C2410_LCON_PEVEN; - } else { - ulcon |= S3C2410_LCON_PNONE; - } - - spin_lock_irqsave(&port->lock, flags); - - dbg("setting ulcon to %08x, brddiv to %d, udivslot %08x\n", - ulcon, quot, udivslot); - - wr_regl(port, S3C2410_ULCON, ulcon); - wr_regl(port, S3C2410_UBRDIV, quot); - wr_regl(port, S3C2410_UMCON, umcon); - - if (ourport->info->has_divslot) - wr_regl(port, S3C2443_DIVSLOT, udivslot); - - dbg("uart: ulcon = 0x%08x, ucon = 0x%08x, ufcon = 0x%08x\n", - rd_regl(port, S3C2410_ULCON), - rd_regl(port, S3C2410_UCON), - rd_regl(port, S3C2410_UFCON)); - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - /* - * Which character status flags are we interested in? - */ - port->read_status_mask = S3C2410_UERSTAT_OVERRUN; - if (termios->c_iflag & INPCK) - port->read_status_mask |= S3C2410_UERSTAT_FRAME | S3C2410_UERSTAT_PARITY; - - /* - * Which character status flags should we ignore? - */ - port->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= S3C2410_UERSTAT_OVERRUN; - if (termios->c_iflag & IGNBRK && termios->c_iflag & IGNPAR) - port->ignore_status_mask |= S3C2410_UERSTAT_FRAME; - - /* - * Ignore all characters if CREAD is not set. - */ - if ((termios->c_cflag & CREAD) == 0) - port->ignore_status_mask |= RXSTAT_DUMMY_READ; - - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *s3c24xx_serial_type(struct uart_port *port) -{ - switch (port->type) { - case PORT_S3C2410: - return "S3C2410"; - case PORT_S3C2440: - return "S3C2440"; - case PORT_S3C2412: - return "S3C2412"; - case PORT_S3C6400: - return "S3C6400/10"; - default: - return NULL; - } -} - -#define MAP_SIZE (0x100) - -static void s3c24xx_serial_release_port(struct uart_port *port) -{ - release_mem_region(port->mapbase, MAP_SIZE); -} - -static int s3c24xx_serial_request_port(struct uart_port *port) -{ - const char *name = s3c24xx_serial_portname(port); - return request_mem_region(port->mapbase, MAP_SIZE, name) ? 0 : -EBUSY; -} - -static void s3c24xx_serial_config_port(struct uart_port *port, int flags) -{ - struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - - if (flags & UART_CONFIG_TYPE && - s3c24xx_serial_request_port(port) == 0) - port->type = info->type; -} - -/* - * verify the new serial_struct (for TIOCSSERIAL). - */ -static int -s3c24xx_serial_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - - if (ser->type != PORT_UNKNOWN && ser->type != info->type) - return -EINVAL; - - return 0; -} - - -#ifdef CONFIG_SERIAL_SAMSUNG_CONSOLE - -static struct console s3c24xx_serial_console; - -#define S3C24XX_SERIAL_CONSOLE &s3c24xx_serial_console -#else -#define S3C24XX_SERIAL_CONSOLE NULL -#endif - -static struct uart_ops s3c24xx_serial_ops = { - .pm = s3c24xx_serial_pm, - .tx_empty = s3c24xx_serial_tx_empty, - .get_mctrl = s3c24xx_serial_get_mctrl, - .set_mctrl = s3c24xx_serial_set_mctrl, - .stop_tx = s3c24xx_serial_stop_tx, - .start_tx = s3c24xx_serial_start_tx, - .stop_rx = s3c24xx_serial_stop_rx, - .enable_ms = s3c24xx_serial_enable_ms, - .break_ctl = s3c24xx_serial_break_ctl, - .startup = s3c24xx_serial_startup, - .shutdown = s3c24xx_serial_shutdown, - .set_termios = s3c24xx_serial_set_termios, - .type = s3c24xx_serial_type, - .release_port = s3c24xx_serial_release_port, - .request_port = s3c24xx_serial_request_port, - .config_port = s3c24xx_serial_config_port, - .verify_port = s3c24xx_serial_verify_port, -}; - - -static struct uart_driver s3c24xx_uart_drv = { - .owner = THIS_MODULE, - .dev_name = "s3c2410_serial", - .nr = CONFIG_SERIAL_SAMSUNG_UARTS, - .cons = S3C24XX_SERIAL_CONSOLE, - .driver_name = S3C24XX_SERIAL_NAME, - .major = S3C24XX_SERIAL_MAJOR, - .minor = S3C24XX_SERIAL_MINOR, -}; - -static struct s3c24xx_uart_port s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS] = { - [0] = { - .port = { - .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[0].port.lock), - .iotype = UPIO_MEM, - .irq = IRQ_S3CUART_RX0, - .uartclk = 0, - .fifosize = 16, - .ops = &s3c24xx_serial_ops, - .flags = UPF_BOOT_AUTOCONF, - .line = 0, - } - }, - [1] = { - .port = { - .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[1].port.lock), - .iotype = UPIO_MEM, - .irq = IRQ_S3CUART_RX1, - .uartclk = 0, - .fifosize = 16, - .ops = &s3c24xx_serial_ops, - .flags = UPF_BOOT_AUTOCONF, - .line = 1, - } - }, -#if CONFIG_SERIAL_SAMSUNG_UARTS > 2 - - [2] = { - .port = { - .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[2].port.lock), - .iotype = UPIO_MEM, - .irq = IRQ_S3CUART_RX2, - .uartclk = 0, - .fifosize = 16, - .ops = &s3c24xx_serial_ops, - .flags = UPF_BOOT_AUTOCONF, - .line = 2, - } - }, -#endif -#if CONFIG_SERIAL_SAMSUNG_UARTS > 3 - [3] = { - .port = { - .lock = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[3].port.lock), - .iotype = UPIO_MEM, - .irq = IRQ_S3CUART_RX3, - .uartclk = 0, - .fifosize = 16, - .ops = &s3c24xx_serial_ops, - .flags = UPF_BOOT_AUTOCONF, - .line = 3, - } - } -#endif -}; - -/* s3c24xx_serial_resetport - * - * wrapper to call the specific reset for this port (reset the fifos - * and the settings) -*/ - -static inline int s3c24xx_serial_resetport(struct uart_port *port, - struct s3c2410_uartcfg *cfg) -{ - struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - - return (info->reset_port)(port, cfg); -} - - -#ifdef CONFIG_CPU_FREQ - -static int s3c24xx_serial_cpufreq_transition(struct notifier_block *nb, - unsigned long val, void *data) -{ - struct s3c24xx_uart_port *port; - struct uart_port *uport; - - port = container_of(nb, struct s3c24xx_uart_port, freq_transition); - uport = &port->port; - - /* check to see if port is enabled */ - - if (port->pm_level != 0) - return 0; - - /* try and work out if the baudrate is changing, we can detect - * a change in rate, but we do not have support for detecting - * a disturbance in the clock-rate over the change. - */ - - if (IS_ERR(port->clk)) - goto exit; - - if (port->baudclk_rate == clk_get_rate(port->clk)) - goto exit; - - if (val == CPUFREQ_PRECHANGE) { - /* we should really shut the port down whilst the - * frequency change is in progress. */ - - } else if (val == CPUFREQ_POSTCHANGE) { - struct ktermios *termios; - struct tty_struct *tty; - - if (uport->state == NULL) - goto exit; - - tty = uport->state->port.tty; - - if (tty == NULL) - goto exit; - - termios = tty->termios; - - if (termios == NULL) { - printk(KERN_WARNING "%s: no termios?\n", __func__); - goto exit; - } - - s3c24xx_serial_set_termios(uport, termios, NULL); - } - - exit: - return 0; -} - -static inline int s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port) -{ - port->freq_transition.notifier_call = s3c24xx_serial_cpufreq_transition; - - return cpufreq_register_notifier(&port->freq_transition, - CPUFREQ_TRANSITION_NOTIFIER); -} - -static inline void s3c24xx_serial_cpufreq_deregister(struct s3c24xx_uart_port *port) -{ - cpufreq_unregister_notifier(&port->freq_transition, - CPUFREQ_TRANSITION_NOTIFIER); -} - -#else -static inline int s3c24xx_serial_cpufreq_register(struct s3c24xx_uart_port *port) -{ - return 0; -} - -static inline void s3c24xx_serial_cpufreq_deregister(struct s3c24xx_uart_port *port) -{ -} -#endif - -/* s3c24xx_serial_init_port - * - * initialise a single serial port from the platform device given - */ - -static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, - struct s3c24xx_uart_info *info, - struct platform_device *platdev) -{ - struct uart_port *port = &ourport->port; - struct s3c2410_uartcfg *cfg; - struct resource *res; - int ret; - - dbg("s3c24xx_serial_init_port: port=%p, platdev=%p\n", port, platdev); - - if (platdev == NULL) - return -ENODEV; - - cfg = s3c24xx_dev_to_cfg(&platdev->dev); - - if (port->mapbase != 0) - return 0; - - if (cfg->hwport > CONFIG_SERIAL_SAMSUNG_UARTS) { - printk(KERN_ERR "%s: port %d bigger than %d\n", __func__, - cfg->hwport, CONFIG_SERIAL_SAMSUNG_UARTS); - return -ERANGE; - } - - /* setup info for port */ - port->dev = &platdev->dev; - ourport->info = info; - - /* copy the info in from provided structure */ - ourport->port.fifosize = info->fifosize; - - dbg("s3c24xx_serial_init_port: %p (hw %d)...\n", port, cfg->hwport); - - port->uartclk = 1; - - if (cfg->uart_flags & UPF_CONS_FLOW) { - dbg("s3c24xx_serial_init_port: enabling flow control\n"); - port->flags |= UPF_CONS_FLOW; - } - - /* sort our the physical and virtual addresses for each UART */ - - res = platform_get_resource(platdev, IORESOURCE_MEM, 0); - if (res == NULL) { - printk(KERN_ERR "failed to find memory resource for uart\n"); - return -EINVAL; - } - - dbg("resource %p (%lx..%lx)\n", res, res->start, res->end); - - port->mapbase = res->start; - port->membase = S3C_VA_UART + (res->start & 0xfffff); - ret = platform_get_irq(platdev, 0); - if (ret < 0) - port->irq = 0; - else { - port->irq = ret; - ourport->rx_irq = ret; - ourport->tx_irq = ret + 1; - } - - ret = platform_get_irq(platdev, 1); - if (ret > 0) - ourport->tx_irq = ret; - - ourport->clk = clk_get(&platdev->dev, "uart"); - - dbg("port: map=%08x, mem=%08x, irq=%d (%d,%d), clock=%ld\n", - port->mapbase, port->membase, port->irq, - ourport->rx_irq, ourport->tx_irq, port->uartclk); - - /* reset the fifos (and setup the uart) */ - s3c24xx_serial_resetport(port, cfg); - return 0; -} - -static ssize_t s3c24xx_serial_show_clksrc(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct uart_port *port = s3c24xx_dev_to_port(dev); - struct s3c24xx_uart_port *ourport = to_ourport(port); - - return snprintf(buf, PAGE_SIZE, "* %s\n", ourport->clksrc->name); -} - -static DEVICE_ATTR(clock_source, S_IRUGO, s3c24xx_serial_show_clksrc, NULL); - -/* Device driver serial port probe */ - -static int probe_index; - -int s3c24xx_serial_probe(struct platform_device *dev, - struct s3c24xx_uart_info *info) -{ - struct s3c24xx_uart_port *ourport; - int ret; - - dbg("s3c24xx_serial_probe(%p, %p) %d\n", dev, info, probe_index); - - ourport = &s3c24xx_serial_ports[probe_index]; - probe_index++; - - dbg("%s: initialising port %p...\n", __func__, ourport); - - ret = s3c24xx_serial_init_port(ourport, info, dev); - if (ret < 0) - goto probe_err; - - dbg("%s: adding port\n", __func__); - uart_add_one_port(&s3c24xx_uart_drv, &ourport->port); - platform_set_drvdata(dev, &ourport->port); - - ret = device_create_file(&dev->dev, &dev_attr_clock_source); - if (ret < 0) - printk(KERN_ERR "%s: failed to add clksrc attr.\n", __func__); - - ret = s3c24xx_serial_cpufreq_register(ourport); - if (ret < 0) - dev_err(&dev->dev, "failed to add cpufreq notifier\n"); - - return 0; - - probe_err: - return ret; -} - -EXPORT_SYMBOL_GPL(s3c24xx_serial_probe); - -int __devexit s3c24xx_serial_remove(struct platform_device *dev) -{ - struct uart_port *port = s3c24xx_dev_to_port(&dev->dev); - - if (port) { - s3c24xx_serial_cpufreq_deregister(to_ourport(port)); - device_remove_file(&dev->dev, &dev_attr_clock_source); - uart_remove_one_port(&s3c24xx_uart_drv, port); - } - - return 0; -} - -EXPORT_SYMBOL_GPL(s3c24xx_serial_remove); - -/* UART power management code */ - -#ifdef CONFIG_PM - -static int s3c24xx_serial_suspend(struct platform_device *dev, pm_message_t state) -{ - struct uart_port *port = s3c24xx_dev_to_port(&dev->dev); - - if (port) - uart_suspend_port(&s3c24xx_uart_drv, port); - - return 0; -} - -static int s3c24xx_serial_resume(struct platform_device *dev) -{ - struct uart_port *port = s3c24xx_dev_to_port(&dev->dev); - struct s3c24xx_uart_port *ourport = to_ourport(port); - - if (port) { - clk_enable(ourport->clk); - s3c24xx_serial_resetport(port, s3c24xx_port_to_cfg(port)); - clk_disable(ourport->clk); - - uart_resume_port(&s3c24xx_uart_drv, port); - } - - return 0; -} -#endif - -int s3c24xx_serial_init(struct platform_driver *drv, - struct s3c24xx_uart_info *info) -{ - dbg("s3c24xx_serial_init(%p,%p)\n", drv, info); - -#ifdef CONFIG_PM - drv->suspend = s3c24xx_serial_suspend; - drv->resume = s3c24xx_serial_resume; -#endif - - return platform_driver_register(drv); -} - -EXPORT_SYMBOL_GPL(s3c24xx_serial_init); - -/* module initialisation code */ - -static int __init s3c24xx_serial_modinit(void) -{ - int ret; - - ret = uart_register_driver(&s3c24xx_uart_drv); - if (ret < 0) { - printk(KERN_ERR "failed to register UART driver\n"); - return -1; - } - - return 0; -} - -static void __exit s3c24xx_serial_modexit(void) -{ - uart_unregister_driver(&s3c24xx_uart_drv); -} - -module_init(s3c24xx_serial_modinit); -module_exit(s3c24xx_serial_modexit); - -/* Console code */ - -#ifdef CONFIG_SERIAL_SAMSUNG_CONSOLE - -static struct uart_port *cons_uart; - -static int -s3c24xx_serial_console_txrdy(struct uart_port *port, unsigned int ufcon) -{ - struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port); - unsigned long ufstat, utrstat; - - if (ufcon & S3C2410_UFCON_FIFOMODE) { - /* fifo mode - check amount of data in fifo registers... */ - - ufstat = rd_regl(port, S3C2410_UFSTAT); - return (ufstat & info->tx_fifofull) ? 0 : 1; - } - - /* in non-fifo mode, we go and use the tx buffer empty */ - - utrstat = rd_regl(port, S3C2410_UTRSTAT); - return (utrstat & S3C2410_UTRSTAT_TXE) ? 1 : 0; -} - -static void -s3c24xx_serial_console_putchar(struct uart_port *port, int ch) -{ - unsigned int ufcon = rd_regl(cons_uart, S3C2410_UFCON); - while (!s3c24xx_serial_console_txrdy(port, ufcon)) - barrier(); - wr_regb(cons_uart, S3C2410_UTXH, ch); -} - -static void -s3c24xx_serial_console_write(struct console *co, const char *s, - unsigned int count) -{ - uart_console_write(cons_uart, s, count, s3c24xx_serial_console_putchar); -} - -static void __init -s3c24xx_serial_get_options(struct uart_port *port, int *baud, - int *parity, int *bits) -{ - struct s3c24xx_uart_clksrc clksrc; - struct clk *clk; - unsigned int ulcon; - unsigned int ucon; - unsigned int ubrdiv; - unsigned long rate; - - ulcon = rd_regl(port, S3C2410_ULCON); - ucon = rd_regl(port, S3C2410_UCON); - ubrdiv = rd_regl(port, S3C2410_UBRDIV); - - dbg("s3c24xx_serial_get_options: port=%p\n" - "registers: ulcon=%08x, ucon=%08x, ubdriv=%08x\n", - port, ulcon, ucon, ubrdiv); - - if ((ucon & 0xf) != 0) { - /* consider the serial port configured if the tx/rx mode set */ - - switch (ulcon & S3C2410_LCON_CSMASK) { - case S3C2410_LCON_CS5: - *bits = 5; - break; - case S3C2410_LCON_CS6: - *bits = 6; - break; - case S3C2410_LCON_CS7: - *bits = 7; - break; - default: - case S3C2410_LCON_CS8: - *bits = 8; - break; - } - - switch (ulcon & S3C2410_LCON_PMASK) { - case S3C2410_LCON_PEVEN: - *parity = 'e'; - break; - - case S3C2410_LCON_PODD: - *parity = 'o'; - break; - - case S3C2410_LCON_PNONE: - default: - *parity = 'n'; - } - - /* now calculate the baud rate */ - - s3c24xx_serial_getsource(port, &clksrc); - - clk = clk_get(port->dev, clksrc.name); - if (!IS_ERR(clk) && clk != NULL) - rate = clk_get_rate(clk) / clksrc.divisor; - else - rate = 1; - - - *baud = rate / (16 * (ubrdiv + 1)); - dbg("calculated baud %d\n", *baud); - } - -} - -/* s3c24xx_serial_init_ports - * - * initialise the serial ports from the machine provided initialisation - * data. -*/ - -static int s3c24xx_serial_init_ports(struct s3c24xx_uart_info **info) -{ - struct s3c24xx_uart_port *ptr = s3c24xx_serial_ports; - struct platform_device **platdev_ptr; - int i; - - dbg("s3c24xx_serial_init_ports: initialising ports...\n"); - - platdev_ptr = s3c24xx_uart_devs; - - for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++, ptr++, platdev_ptr++) { - s3c24xx_serial_init_port(ptr, info[i], *platdev_ptr); - } - - return 0; -} - -static int __init -s3c24xx_serial_console_setup(struct console *co, char *options) -{ - struct uart_port *port; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - dbg("s3c24xx_serial_console_setup: co=%p (%d), %s\n", - co, co->index, options); - - /* is this a valid port */ - - if (co->index == -1 || co->index >= CONFIG_SERIAL_SAMSUNG_UARTS) - co->index = 0; - - port = &s3c24xx_serial_ports[co->index].port; - - /* is the port configured? */ - - if (port->mapbase == 0x0) { - co->index = 0; - port = &s3c24xx_serial_ports[co->index].port; - } - - cons_uart = port; - - dbg("s3c24xx_serial_console_setup: port=%p (%d)\n", port, co->index); - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - else - s3c24xx_serial_get_options(port, &baud, &parity, &bits); - - dbg("s3c24xx_serial_console_setup: baud %d\n", baud); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - -/* s3c24xx_serial_initconsole - * - * initialise the console from one of the uart drivers -*/ - -static struct console s3c24xx_serial_console = { - .name = S3C24XX_SERIAL_NAME, - .device = uart_console_device, - .flags = CON_PRINTBUFFER, - .index = -1, - .write = s3c24xx_serial_console_write, - .setup = s3c24xx_serial_console_setup -}; - -int s3c24xx_serial_initconsole(struct platform_driver *drv, - struct s3c24xx_uart_info **info) - -{ - struct platform_device *dev = s3c24xx_uart_devs[0]; - - dbg("s3c24xx_serial_initconsole\n"); - - /* select driver based on the cpu */ - - if (dev == NULL) { - printk(KERN_ERR "s3c24xx: no devices for console init\n"); - return 0; - } - - if (strcmp(dev->name, drv->driver.name) != 0) - return 0; - - s3c24xx_serial_console.data = &s3c24xx_uart_drv; - s3c24xx_serial_init_ports(info); - - register_console(&s3c24xx_serial_console); - return 0; -} - -#endif /* CONFIG_SERIAL_SAMSUNG_CONSOLE */ - -MODULE_DESCRIPTION("Samsung SoC Serial port driver"); -MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/serial/samsung.h b/drivers/serial/samsung.h deleted file mode 100644 index 0ac06a07d25f..000000000000 --- a/drivers/serial/samsung.h +++ /dev/null @@ -1,120 +0,0 @@ -/* linux/drivers/serial/samsung.h - * - * Driver for Samsung SoC onboard UARTs. - * - * Ben Dooks, Copyright (c) 2003-2008 Simtec Electronics - * http://armlinux.simtec.co.uk/ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. -*/ - -struct s3c24xx_uart_info { - char *name; - unsigned int type; - unsigned int fifosize; - unsigned long rx_fifomask; - unsigned long rx_fifoshift; - unsigned long rx_fifofull; - unsigned long tx_fifomask; - unsigned long tx_fifoshift; - unsigned long tx_fifofull; - - /* uart port features */ - - unsigned int has_divslot:1; - - /* clock source control */ - - int (*get_clksrc)(struct uart_port *, struct s3c24xx_uart_clksrc *clk); - int (*set_clksrc)(struct uart_port *, struct s3c24xx_uart_clksrc *clk); - - /* uart controls */ - int (*reset_port)(struct uart_port *, struct s3c2410_uartcfg *); -}; - -struct s3c24xx_uart_port { - unsigned char rx_claimed; - unsigned char tx_claimed; - unsigned int pm_level; - unsigned long baudclk_rate; - - unsigned int rx_irq; - unsigned int tx_irq; - - struct s3c24xx_uart_info *info; - struct s3c24xx_uart_clksrc *clksrc; - struct clk *clk; - struct clk *baudclk; - struct uart_port port; - -#ifdef CONFIG_CPU_FREQ - struct notifier_block freq_transition; -#endif -}; - -/* conversion functions */ - -#define s3c24xx_dev_to_port(__dev) (struct uart_port *)dev_get_drvdata(__dev) -#define s3c24xx_dev_to_cfg(__dev) (struct s3c2410_uartcfg *)((__dev)->platform_data) - -/* register access controls */ - -#define portaddr(port, reg) ((port)->membase + (reg)) - -#define rd_regb(port, reg) (__raw_readb(portaddr(port, reg))) -#define rd_regl(port, reg) (__raw_readl(portaddr(port, reg))) - -#define wr_regb(port, reg, val) __raw_writeb(val, portaddr(port, reg)) -#define wr_regl(port, reg, val) __raw_writel(val, portaddr(port, reg)) - -extern int s3c24xx_serial_probe(struct platform_device *dev, - struct s3c24xx_uart_info *uart); - -extern int __devexit s3c24xx_serial_remove(struct platform_device *dev); - -extern int s3c24xx_serial_initconsole(struct platform_driver *drv, - struct s3c24xx_uart_info **uart); - -extern int s3c24xx_serial_init(struct platform_driver *drv, - struct s3c24xx_uart_info *info); - -#ifdef CONFIG_SERIAL_SAMSUNG_CONSOLE - -#define s3c24xx_console_init(__drv, __inf) \ -static int __init s3c_serial_console_init(void) \ -{ \ - struct s3c24xx_uart_info *uinfo[CONFIG_SERIAL_SAMSUNG_UARTS]; \ - int i; \ - \ - for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++) \ - uinfo[i] = __inf; \ - return s3c24xx_serial_initconsole(__drv, uinfo); \ -} \ - \ -console_initcall(s3c_serial_console_init) - -#else -#define s3c24xx_console_init(drv, inf) extern void no_console(void) -#endif - -#ifdef CONFIG_SERIAL_SAMSUNG_DEBUG - -extern void printascii(const char *); - -static void dbg(const char *fmt, ...) -{ - va_list va; - char buff[256]; - - va_start(va, fmt); - vsprintf(buff, fmt, va); - va_end(va); - - printascii(buff); -} - -#else -#define dbg(x...) do { } while (0) -#endif diff --git a/drivers/serial/sb1250-duart.c b/drivers/serial/sb1250-duart.c deleted file mode 100644 index a2f2b3254499..000000000000 --- a/drivers/serial/sb1250-duart.c +++ /dev/null @@ -1,976 +0,0 @@ -/* - * drivers/serial/sb1250-duart.c - * - * Support for the asynchronous serial interface (DUART) included - * in the BCM1250 and derived System-On-a-Chip (SOC) devices. - * - * Copyright (c) 2007 Maciej W. Rozycki - * - * Derived from drivers/char/sb1250_duart.c for which the following - * copyright applies: - * - * Copyright (c) 2000, 2001, 2002, 2003, 2004 Broadcom Corporation - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - * References: - * - * "BCM1250/BCM1125/BCM1125H User Manual", Broadcom Corporation - */ - -#if defined(CONFIG_SERIAL_SB1250_DUART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/compiler.h> -#include <linux/console.h> -#include <linux/delay.h> -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/kernel.h> -#include <linux/major.h> -#include <linux/serial.h> -#include <linux/serial_core.h> -#include <linux/spinlock.h> -#include <linux/sysrq.h> -#include <linux/tty.h> -#include <linux/types.h> - -#include <asm/atomic.h> -#include <asm/io.h> -#include <asm/war.h> - -#include <asm/sibyte/sb1250.h> -#include <asm/sibyte/sb1250_uart.h> -#include <asm/sibyte/swarm.h> - - -#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80) -#include <asm/sibyte/bcm1480_regs.h> -#include <asm/sibyte/bcm1480_int.h> - -#define SBD_CHANREGS(line) A_BCM1480_DUART_CHANREG((line), 0) -#define SBD_CTRLREGS(line) A_BCM1480_DUART_CTRLREG((line), 0) -#define SBD_INT(line) (K_BCM1480_INT_UART_0 + (line)) - -#define DUART_CHANREG_SPACING BCM1480_DUART_CHANREG_SPACING - -#define R_DUART_IMRREG(line) R_BCM1480_DUART_IMRREG(line) -#define R_DUART_INCHREG(line) R_BCM1480_DUART_INCHREG(line) -#define R_DUART_ISRREG(line) R_BCM1480_DUART_ISRREG(line) - -#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X) -#include <asm/sibyte/sb1250_regs.h> -#include <asm/sibyte/sb1250_int.h> - -#define SBD_CHANREGS(line) A_DUART_CHANREG((line), 0) -#define SBD_CTRLREGS(line) A_DUART_CTRLREG(0) -#define SBD_INT(line) (K_INT_UART_0 + (line)) - -#else -#error invalid SB1250 UART configuration - -#endif - - -MODULE_AUTHOR("Maciej W. Rozycki <macro@linux-mips.org>"); -MODULE_DESCRIPTION("BCM1xxx on-chip DUART serial driver"); -MODULE_LICENSE("GPL"); - - -#define DUART_MAX_CHIP 2 -#define DUART_MAX_SIDE 2 - -/* - * Per-port state. - */ -struct sbd_port { - struct sbd_duart *duart; - struct uart_port port; - unsigned char __iomem *memctrl; - int tx_stopped; - int initialised; -}; - -/* - * Per-DUART state for the shared register space. - */ -struct sbd_duart { - struct sbd_port sport[2]; - unsigned long mapctrl; - atomic_t map_guard; -}; - -#define to_sport(uport) container_of(uport, struct sbd_port, port) - -static struct sbd_duart sbd_duarts[DUART_MAX_CHIP]; - - -/* - * Reading and writing SB1250 DUART registers. - * - * There are three register spaces: two per-channel ones and - * a shared one. We have to define accessors appropriately. - * All registers are 64-bit and all but the Baud Rate Clock - * registers only define 8 least significant bits. There is - * also a workaround to take into account. Raw accessors use - * the full register width, but cooked ones truncate it - * intentionally so that the rest of the driver does not care. - */ -static u64 __read_sbdchn(struct sbd_port *sport, int reg) -{ - void __iomem *csr = sport->port.membase + reg; - - return __raw_readq(csr); -} - -static u64 __read_sbdshr(struct sbd_port *sport, int reg) -{ - void __iomem *csr = sport->memctrl + reg; - - return __raw_readq(csr); -} - -static void __write_sbdchn(struct sbd_port *sport, int reg, u64 value) -{ - void __iomem *csr = sport->port.membase + reg; - - __raw_writeq(value, csr); -} - -static void __write_sbdshr(struct sbd_port *sport, int reg, u64 value) -{ - void __iomem *csr = sport->memctrl + reg; - - __raw_writeq(value, csr); -} - -/* - * In bug 1956, we get glitches that can mess up uart registers. This - * "read-mode-reg after any register access" is an accepted workaround. - */ -static void __war_sbd1956(struct sbd_port *sport) -{ - __read_sbdchn(sport, R_DUART_MODE_REG_1); - __read_sbdchn(sport, R_DUART_MODE_REG_2); -} - -static unsigned char read_sbdchn(struct sbd_port *sport, int reg) -{ - unsigned char retval; - - retval = __read_sbdchn(sport, reg); - if (SIBYTE_1956_WAR) - __war_sbd1956(sport); - return retval; -} - -static unsigned char read_sbdshr(struct sbd_port *sport, int reg) -{ - unsigned char retval; - - retval = __read_sbdshr(sport, reg); - if (SIBYTE_1956_WAR) - __war_sbd1956(sport); - return retval; -} - -static void write_sbdchn(struct sbd_port *sport, int reg, unsigned int value) -{ - __write_sbdchn(sport, reg, value); - if (SIBYTE_1956_WAR) - __war_sbd1956(sport); -} - -static void write_sbdshr(struct sbd_port *sport, int reg, unsigned int value) -{ - __write_sbdshr(sport, reg, value); - if (SIBYTE_1956_WAR) - __war_sbd1956(sport); -} - - -static int sbd_receive_ready(struct sbd_port *sport) -{ - return read_sbdchn(sport, R_DUART_STATUS) & M_DUART_RX_RDY; -} - -static int sbd_receive_drain(struct sbd_port *sport) -{ - int loops = 10000; - - while (sbd_receive_ready(sport) && --loops) - read_sbdchn(sport, R_DUART_RX_HOLD); - return loops; -} - -static int __maybe_unused sbd_transmit_ready(struct sbd_port *sport) -{ - return read_sbdchn(sport, R_DUART_STATUS) & M_DUART_TX_RDY; -} - -static int __maybe_unused sbd_transmit_drain(struct sbd_port *sport) -{ - int loops = 10000; - - while (!sbd_transmit_ready(sport) && --loops) - udelay(2); - return loops; -} - -static int sbd_transmit_empty(struct sbd_port *sport) -{ - return read_sbdchn(sport, R_DUART_STATUS) & M_DUART_TX_EMT; -} - -static int sbd_line_drain(struct sbd_port *sport) -{ - int loops = 10000; - - while (!sbd_transmit_empty(sport) && --loops) - udelay(2); - return loops; -} - - -static unsigned int sbd_tx_empty(struct uart_port *uport) -{ - struct sbd_port *sport = to_sport(uport); - - return sbd_transmit_empty(sport) ? TIOCSER_TEMT : 0; -} - -static unsigned int sbd_get_mctrl(struct uart_port *uport) -{ - struct sbd_port *sport = to_sport(uport); - unsigned int mctrl, status; - - status = read_sbdshr(sport, R_DUART_IN_PORT); - status >>= (uport->line) % 2; - mctrl = (!(status & M_DUART_IN_PIN0_VAL) ? TIOCM_CTS : 0) | - (!(status & M_DUART_IN_PIN4_VAL) ? TIOCM_CAR : 0) | - (!(status & M_DUART_RIN0_PIN) ? TIOCM_RNG : 0) | - (!(status & M_DUART_IN_PIN2_VAL) ? TIOCM_DSR : 0); - return mctrl; -} - -static void sbd_set_mctrl(struct uart_port *uport, unsigned int mctrl) -{ - struct sbd_port *sport = to_sport(uport); - unsigned int clr = 0, set = 0, mode2; - - if (mctrl & TIOCM_DTR) - set |= M_DUART_SET_OPR2; - else - clr |= M_DUART_CLR_OPR2; - if (mctrl & TIOCM_RTS) - set |= M_DUART_SET_OPR0; - else - clr |= M_DUART_CLR_OPR0; - clr <<= (uport->line) % 2; - set <<= (uport->line) % 2; - - mode2 = read_sbdchn(sport, R_DUART_MODE_REG_2); - mode2 &= ~M_DUART_CHAN_MODE; - if (mctrl & TIOCM_LOOP) - mode2 |= V_DUART_CHAN_MODE_LCL_LOOP; - else - mode2 |= V_DUART_CHAN_MODE_NORMAL; - - write_sbdshr(sport, R_DUART_CLEAR_OPR, clr); - write_sbdshr(sport, R_DUART_SET_OPR, set); - write_sbdchn(sport, R_DUART_MODE_REG_2, mode2); -} - -static void sbd_stop_tx(struct uart_port *uport) -{ - struct sbd_port *sport = to_sport(uport); - - write_sbdchn(sport, R_DUART_CMD, M_DUART_TX_DIS); - sport->tx_stopped = 1; -}; - -static void sbd_start_tx(struct uart_port *uport) -{ - struct sbd_port *sport = to_sport(uport); - unsigned int mask; - - /* Enable tx interrupts. */ - mask = read_sbdshr(sport, R_DUART_IMRREG((uport->line) % 2)); - mask |= M_DUART_IMR_TX; - write_sbdshr(sport, R_DUART_IMRREG((uport->line) % 2), mask); - - /* Go!, go!, go!... */ - write_sbdchn(sport, R_DUART_CMD, M_DUART_TX_EN); - sport->tx_stopped = 0; -}; - -static void sbd_stop_rx(struct uart_port *uport) -{ - struct sbd_port *sport = to_sport(uport); - - write_sbdshr(sport, R_DUART_IMRREG((uport->line) % 2), 0); -}; - -static void sbd_enable_ms(struct uart_port *uport) -{ - struct sbd_port *sport = to_sport(uport); - - write_sbdchn(sport, R_DUART_AUXCTL_X, - M_DUART_CIN_CHNG_ENA | M_DUART_CTS_CHNG_ENA); -} - -static void sbd_break_ctl(struct uart_port *uport, int break_state) -{ - struct sbd_port *sport = to_sport(uport); - - if (break_state == -1) - write_sbdchn(sport, R_DUART_CMD, V_DUART_MISC_CMD_START_BREAK); - else - write_sbdchn(sport, R_DUART_CMD, V_DUART_MISC_CMD_STOP_BREAK); -} - - -static void sbd_receive_chars(struct sbd_port *sport) -{ - struct uart_port *uport = &sport->port; - struct uart_icount *icount; - unsigned int status, ch, flag; - int count; - - for (count = 16; count; count--) { - status = read_sbdchn(sport, R_DUART_STATUS); - if (!(status & M_DUART_RX_RDY)) - break; - - ch = read_sbdchn(sport, R_DUART_RX_HOLD); - - flag = TTY_NORMAL; - - icount = &uport->icount; - icount->rx++; - - if (unlikely(status & - (M_DUART_RCVD_BRK | M_DUART_FRM_ERR | - M_DUART_PARITY_ERR | M_DUART_OVRUN_ERR))) { - if (status & M_DUART_RCVD_BRK) { - icount->brk++; - if (uart_handle_break(uport)) - continue; - } else if (status & M_DUART_FRM_ERR) - icount->frame++; - else if (status & M_DUART_PARITY_ERR) - icount->parity++; - if (status & M_DUART_OVRUN_ERR) - icount->overrun++; - - status &= uport->read_status_mask; - if (status & M_DUART_RCVD_BRK) - flag = TTY_BREAK; - else if (status & M_DUART_FRM_ERR) - flag = TTY_FRAME; - else if (status & M_DUART_PARITY_ERR) - flag = TTY_PARITY; - } - - if (uart_handle_sysrq_char(uport, ch)) - continue; - - uart_insert_char(uport, status, M_DUART_OVRUN_ERR, ch, flag); - } - - tty_flip_buffer_push(uport->state->port.tty); -} - -static void sbd_transmit_chars(struct sbd_port *sport) -{ - struct uart_port *uport = &sport->port; - struct circ_buf *xmit = &sport->port.state->xmit; - unsigned int mask; - int stop_tx; - - /* XON/XOFF chars. */ - if (sport->port.x_char) { - write_sbdchn(sport, R_DUART_TX_HOLD, sport->port.x_char); - sport->port.icount.tx++; - sport->port.x_char = 0; - return; - } - - /* If nothing to do or stopped or hardware stopped. */ - stop_tx = (uart_circ_empty(xmit) || uart_tx_stopped(&sport->port)); - - /* Send char. */ - if (!stop_tx) { - write_sbdchn(sport, R_DUART_TX_HOLD, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - sport->port.icount.tx++; - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&sport->port); - } - - /* Are we are done? */ - if (stop_tx || uart_circ_empty(xmit)) { - /* Disable tx interrupts. */ - mask = read_sbdshr(sport, R_DUART_IMRREG((uport->line) % 2)); - mask &= ~M_DUART_IMR_TX; - write_sbdshr(sport, R_DUART_IMRREG((uport->line) % 2), mask); - } -} - -static void sbd_status_handle(struct sbd_port *sport) -{ - struct uart_port *uport = &sport->port; - unsigned int delta; - - delta = read_sbdshr(sport, R_DUART_INCHREG((uport->line) % 2)); - delta >>= (uport->line) % 2; - - if (delta & (M_DUART_IN_PIN0_VAL << S_DUART_IN_PIN_CHNG)) - uart_handle_cts_change(uport, !(delta & M_DUART_IN_PIN0_VAL)); - - if (delta & (M_DUART_IN_PIN2_VAL << S_DUART_IN_PIN_CHNG)) - uport->icount.dsr++; - - if (delta & ((M_DUART_IN_PIN2_VAL | M_DUART_IN_PIN0_VAL) << - S_DUART_IN_PIN_CHNG)) - wake_up_interruptible(&uport->state->port.delta_msr_wait); -} - -static irqreturn_t sbd_interrupt(int irq, void *dev_id) -{ - struct sbd_port *sport = dev_id; - struct uart_port *uport = &sport->port; - irqreturn_t status = IRQ_NONE; - unsigned int intstat; - int count; - - for (count = 16; count; count--) { - intstat = read_sbdshr(sport, - R_DUART_ISRREG((uport->line) % 2)); - intstat &= read_sbdshr(sport, - R_DUART_IMRREG((uport->line) % 2)); - intstat &= M_DUART_ISR_ALL; - if (!intstat) - break; - - if (intstat & M_DUART_ISR_RX) - sbd_receive_chars(sport); - if (intstat & M_DUART_ISR_IN) - sbd_status_handle(sport); - if (intstat & M_DUART_ISR_TX) - sbd_transmit_chars(sport); - - status = IRQ_HANDLED; - } - - return status; -} - - -static int sbd_startup(struct uart_port *uport) -{ - struct sbd_port *sport = to_sport(uport); - unsigned int mode1; - int ret; - - ret = request_irq(sport->port.irq, sbd_interrupt, - IRQF_SHARED, "sb1250-duart", sport); - if (ret) - return ret; - - /* Clear the receive FIFO. */ - sbd_receive_drain(sport); - - /* Clear the interrupt registers. */ - write_sbdchn(sport, R_DUART_CMD, V_DUART_MISC_CMD_RESET_BREAK_INT); - read_sbdshr(sport, R_DUART_INCHREG((uport->line) % 2)); - - /* Set rx/tx interrupt to FIFO available. */ - mode1 = read_sbdchn(sport, R_DUART_MODE_REG_1); - mode1 &= ~(M_DUART_RX_IRQ_SEL_RXFULL | M_DUART_TX_IRQ_SEL_TXEMPT); - write_sbdchn(sport, R_DUART_MODE_REG_1, mode1); - - /* Disable tx, enable rx. */ - write_sbdchn(sport, R_DUART_CMD, M_DUART_TX_DIS | M_DUART_RX_EN); - sport->tx_stopped = 1; - - /* Enable interrupts. */ - write_sbdshr(sport, R_DUART_IMRREG((uport->line) % 2), - M_DUART_IMR_IN | M_DUART_IMR_RX); - - return 0; -} - -static void sbd_shutdown(struct uart_port *uport) -{ - struct sbd_port *sport = to_sport(uport); - - write_sbdchn(sport, R_DUART_CMD, M_DUART_TX_DIS | M_DUART_RX_DIS); - sport->tx_stopped = 1; - free_irq(sport->port.irq, sport); -} - - -static void sbd_init_port(struct sbd_port *sport) -{ - struct uart_port *uport = &sport->port; - - if (sport->initialised) - return; - - /* There is no DUART reset feature, so just set some sane defaults. */ - write_sbdchn(sport, R_DUART_CMD, V_DUART_MISC_CMD_RESET_TX); - write_sbdchn(sport, R_DUART_CMD, V_DUART_MISC_CMD_RESET_RX); - write_sbdchn(sport, R_DUART_MODE_REG_1, V_DUART_BITS_PER_CHAR_8); - write_sbdchn(sport, R_DUART_MODE_REG_2, 0); - write_sbdchn(sport, R_DUART_FULL_CTL, - V_DUART_INT_TIME(0) | V_DUART_SIG_FULL(15)); - write_sbdchn(sport, R_DUART_OPCR_X, 0); - write_sbdchn(sport, R_DUART_AUXCTL_X, 0); - write_sbdshr(sport, R_DUART_IMRREG((uport->line) % 2), 0); - - sport->initialised = 1; -} - -static void sbd_set_termios(struct uart_port *uport, struct ktermios *termios, - struct ktermios *old_termios) -{ - struct sbd_port *sport = to_sport(uport); - unsigned int mode1 = 0, mode2 = 0, aux = 0; - unsigned int mode1mask = 0, mode2mask = 0, auxmask = 0; - unsigned int oldmode1, oldmode2, oldaux; - unsigned int baud, brg; - unsigned int command; - - mode1mask |= ~(M_DUART_PARITY_MODE | M_DUART_PARITY_TYPE_ODD | - M_DUART_BITS_PER_CHAR); - mode2mask |= ~M_DUART_STOP_BIT_LEN_2; - auxmask |= ~M_DUART_CTS_CHNG_ENA; - - /* Byte size. */ - switch (termios->c_cflag & CSIZE) { - case CS5: - case CS6: - /* Unsupported, leave unchanged. */ - mode1mask |= M_DUART_PARITY_MODE; - break; - case CS7: - mode1 |= V_DUART_BITS_PER_CHAR_7; - break; - case CS8: - default: - mode1 |= V_DUART_BITS_PER_CHAR_8; - break; - } - - /* Parity and stop bits. */ - if (termios->c_cflag & CSTOPB) - mode2 |= M_DUART_STOP_BIT_LEN_2; - else - mode2 |= M_DUART_STOP_BIT_LEN_1; - if (termios->c_cflag & PARENB) - mode1 |= V_DUART_PARITY_MODE_ADD; - else - mode1 |= V_DUART_PARITY_MODE_NONE; - if (termios->c_cflag & PARODD) - mode1 |= M_DUART_PARITY_TYPE_ODD; - else - mode1 |= M_DUART_PARITY_TYPE_EVEN; - - baud = uart_get_baud_rate(uport, termios, old_termios, 1200, 5000000); - brg = V_DUART_BAUD_RATE(baud); - /* The actual lower bound is 1221bps, so compensate. */ - if (brg > M_DUART_CLK_COUNTER) - brg = M_DUART_CLK_COUNTER; - - uart_update_timeout(uport, termios->c_cflag, baud); - - uport->read_status_mask = M_DUART_OVRUN_ERR; - if (termios->c_iflag & INPCK) - uport->read_status_mask |= M_DUART_FRM_ERR | - M_DUART_PARITY_ERR; - if (termios->c_iflag & (BRKINT | PARMRK)) - uport->read_status_mask |= M_DUART_RCVD_BRK; - - uport->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - uport->ignore_status_mask |= M_DUART_FRM_ERR | - M_DUART_PARITY_ERR; - if (termios->c_iflag & IGNBRK) { - uport->ignore_status_mask |= M_DUART_RCVD_BRK; - if (termios->c_iflag & IGNPAR) - uport->ignore_status_mask |= M_DUART_OVRUN_ERR; - } - - if (termios->c_cflag & CREAD) - command = M_DUART_RX_EN; - else - command = M_DUART_RX_DIS; - - if (termios->c_cflag & CRTSCTS) - aux |= M_DUART_CTS_CHNG_ENA; - else - aux &= ~M_DUART_CTS_CHNG_ENA; - - spin_lock(&uport->lock); - - if (sport->tx_stopped) - command |= M_DUART_TX_DIS; - else - command |= M_DUART_TX_EN; - - oldmode1 = read_sbdchn(sport, R_DUART_MODE_REG_1) & mode1mask; - oldmode2 = read_sbdchn(sport, R_DUART_MODE_REG_2) & mode2mask; - oldaux = read_sbdchn(sport, R_DUART_AUXCTL_X) & auxmask; - - if (!sport->tx_stopped) - sbd_line_drain(sport); - write_sbdchn(sport, R_DUART_CMD, M_DUART_TX_DIS | M_DUART_RX_DIS); - - write_sbdchn(sport, R_DUART_MODE_REG_1, mode1 | oldmode1); - write_sbdchn(sport, R_DUART_MODE_REG_2, mode2 | oldmode2); - write_sbdchn(sport, R_DUART_CLK_SEL, brg); - write_sbdchn(sport, R_DUART_AUXCTL_X, aux | oldaux); - - write_sbdchn(sport, R_DUART_CMD, command); - - spin_unlock(&uport->lock); -} - - -static const char *sbd_type(struct uart_port *uport) -{ - return "SB1250 DUART"; -} - -static void sbd_release_port(struct uart_port *uport) -{ - struct sbd_port *sport = to_sport(uport); - struct sbd_duart *duart = sport->duart; - int map_guard; - - iounmap(sport->memctrl); - sport->memctrl = NULL; - iounmap(uport->membase); - uport->membase = NULL; - - map_guard = atomic_add_return(-1, &duart->map_guard); - if (!map_guard) - release_mem_region(duart->mapctrl, DUART_CHANREG_SPACING); - release_mem_region(uport->mapbase, DUART_CHANREG_SPACING); -} - -static int sbd_map_port(struct uart_port *uport) -{ - const char *err = KERN_ERR "sbd: Cannot map MMIO\n"; - struct sbd_port *sport = to_sport(uport); - struct sbd_duart *duart = sport->duart; - - if (!uport->membase) - uport->membase = ioremap_nocache(uport->mapbase, - DUART_CHANREG_SPACING); - if (!uport->membase) { - printk(err); - return -ENOMEM; - } - - if (!sport->memctrl) - sport->memctrl = ioremap_nocache(duart->mapctrl, - DUART_CHANREG_SPACING); - if (!sport->memctrl) { - printk(err); - iounmap(uport->membase); - uport->membase = NULL; - return -ENOMEM; - } - - return 0; -} - -static int sbd_request_port(struct uart_port *uport) -{ - const char *err = KERN_ERR "sbd: Unable to reserve MMIO resource\n"; - struct sbd_duart *duart = to_sport(uport)->duart; - int map_guard; - int ret = 0; - - if (!request_mem_region(uport->mapbase, DUART_CHANREG_SPACING, - "sb1250-duart")) { - printk(err); - return -EBUSY; - } - map_guard = atomic_add_return(1, &duart->map_guard); - if (map_guard == 1) { - if (!request_mem_region(duart->mapctrl, DUART_CHANREG_SPACING, - "sb1250-duart")) { - atomic_add(-1, &duart->map_guard); - printk(err); - ret = -EBUSY; - } - } - if (!ret) { - ret = sbd_map_port(uport); - if (ret) { - map_guard = atomic_add_return(-1, &duart->map_guard); - if (!map_guard) - release_mem_region(duart->mapctrl, - DUART_CHANREG_SPACING); - } - } - if (ret) { - release_mem_region(uport->mapbase, DUART_CHANREG_SPACING); - return ret; - } - return 0; -} - -static void sbd_config_port(struct uart_port *uport, int flags) -{ - struct sbd_port *sport = to_sport(uport); - - if (flags & UART_CONFIG_TYPE) { - if (sbd_request_port(uport)) - return; - - uport->type = PORT_SB1250_DUART; - - sbd_init_port(sport); - } -} - -static int sbd_verify_port(struct uart_port *uport, struct serial_struct *ser) -{ - int ret = 0; - - if (ser->type != PORT_UNKNOWN && ser->type != PORT_SB1250_DUART) - ret = -EINVAL; - if (ser->irq != uport->irq) - ret = -EINVAL; - if (ser->baud_base != uport->uartclk / 16) - ret = -EINVAL; - return ret; -} - - -static const struct uart_ops sbd_ops = { - .tx_empty = sbd_tx_empty, - .set_mctrl = sbd_set_mctrl, - .get_mctrl = sbd_get_mctrl, - .stop_tx = sbd_stop_tx, - .start_tx = sbd_start_tx, - .stop_rx = sbd_stop_rx, - .enable_ms = sbd_enable_ms, - .break_ctl = sbd_break_ctl, - .startup = sbd_startup, - .shutdown = sbd_shutdown, - .set_termios = sbd_set_termios, - .type = sbd_type, - .release_port = sbd_release_port, - .request_port = sbd_request_port, - .config_port = sbd_config_port, - .verify_port = sbd_verify_port, -}; - -/* Initialize SB1250 DUART port structures. */ -static void __init sbd_probe_duarts(void) -{ - static int probed; - int chip, side; - int max_lines, line; - - if (probed) - return; - - /* Set the number of available units based on the SOC type. */ - switch (soc_type) { - case K_SYS_SOC_TYPE_BCM1x55: - case K_SYS_SOC_TYPE_BCM1x80: - max_lines = 4; - break; - default: - /* Assume at least two serial ports at the normal address. */ - max_lines = 2; - break; - } - - probed = 1; - - for (chip = 0, line = 0; chip < DUART_MAX_CHIP && line < max_lines; - chip++) { - sbd_duarts[chip].mapctrl = SBD_CTRLREGS(line); - - for (side = 0; side < DUART_MAX_SIDE && line < max_lines; - side++, line++) { - struct sbd_port *sport = &sbd_duarts[chip].sport[side]; - struct uart_port *uport = &sport->port; - - sport->duart = &sbd_duarts[chip]; - - uport->irq = SBD_INT(line); - uport->uartclk = 100000000 / 20 * 16; - uport->fifosize = 16; - uport->iotype = UPIO_MEM; - uport->flags = UPF_BOOT_AUTOCONF; - uport->ops = &sbd_ops; - uport->line = line; - uport->mapbase = SBD_CHANREGS(line); - } - } -} - - -#ifdef CONFIG_SERIAL_SB1250_DUART_CONSOLE -/* - * Serial console stuff. Very basic, polling driver for doing serial - * console output. The console_sem is held by the caller, so we - * shouldn't be interrupted for more console activity. - */ -static void sbd_console_putchar(struct uart_port *uport, int ch) -{ - struct sbd_port *sport = to_sport(uport); - - sbd_transmit_drain(sport); - write_sbdchn(sport, R_DUART_TX_HOLD, ch); -} - -static void sbd_console_write(struct console *co, const char *s, - unsigned int count) -{ - int chip = co->index / DUART_MAX_SIDE; - int side = co->index % DUART_MAX_SIDE; - struct sbd_port *sport = &sbd_duarts[chip].sport[side]; - struct uart_port *uport = &sport->port; - unsigned long flags; - unsigned int mask; - - /* Disable transmit interrupts and enable the transmitter. */ - spin_lock_irqsave(&uport->lock, flags); - mask = read_sbdshr(sport, R_DUART_IMRREG((uport->line) % 2)); - write_sbdshr(sport, R_DUART_IMRREG((uport->line) % 2), - mask & ~M_DUART_IMR_TX); - write_sbdchn(sport, R_DUART_CMD, M_DUART_TX_EN); - spin_unlock_irqrestore(&uport->lock, flags); - - uart_console_write(&sport->port, s, count, sbd_console_putchar); - - /* Restore transmit interrupts and the transmitter enable. */ - spin_lock_irqsave(&uport->lock, flags); - sbd_line_drain(sport); - if (sport->tx_stopped) - write_sbdchn(sport, R_DUART_CMD, M_DUART_TX_DIS); - write_sbdshr(sport, R_DUART_IMRREG((uport->line) % 2), mask); - spin_unlock_irqrestore(&uport->lock, flags); -} - -static int __init sbd_console_setup(struct console *co, char *options) -{ - int chip = co->index / DUART_MAX_SIDE; - int side = co->index % DUART_MAX_SIDE; - struct sbd_port *sport = &sbd_duarts[chip].sport[side]; - struct uart_port *uport = &sport->port; - int baud = 115200; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - int ret; - - if (!sport->duart) - return -ENXIO; - - ret = sbd_map_port(uport); - if (ret) - return ret; - - sbd_init_port(sport); - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - return uart_set_options(uport, co, baud, parity, bits, flow); -} - -static struct uart_driver sbd_reg; -static struct console sbd_console = { - .name = "duart", - .write = sbd_console_write, - .device = uart_console_device, - .setup = sbd_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &sbd_reg -}; - -static int __init sbd_serial_console_init(void) -{ - sbd_probe_duarts(); - register_console(&sbd_console); - - return 0; -} - -console_initcall(sbd_serial_console_init); - -#define SERIAL_SB1250_DUART_CONSOLE &sbd_console -#else -#define SERIAL_SB1250_DUART_CONSOLE NULL -#endif /* CONFIG_SERIAL_SB1250_DUART_CONSOLE */ - - -static struct uart_driver sbd_reg = { - .owner = THIS_MODULE, - .driver_name = "sb1250_duart", - .dev_name = "duart", - .major = TTY_MAJOR, - .minor = SB1250_DUART_MINOR_BASE, - .nr = DUART_MAX_CHIP * DUART_MAX_SIDE, - .cons = SERIAL_SB1250_DUART_CONSOLE, -}; - -/* Set up the driver and register it. */ -static int __init sbd_init(void) -{ - int i, ret; - - sbd_probe_duarts(); - - ret = uart_register_driver(&sbd_reg); - if (ret) - return ret; - - for (i = 0; i < DUART_MAX_CHIP * DUART_MAX_SIDE; i++) { - struct sbd_duart *duart = &sbd_duarts[i / DUART_MAX_SIDE]; - struct sbd_port *sport = &duart->sport[i % DUART_MAX_SIDE]; - struct uart_port *uport = &sport->port; - - if (sport->duart) - uart_add_one_port(&sbd_reg, uport); - } - - return 0; -} - -/* Unload the driver. Unregister stuff, get ready to go away. */ -static void __exit sbd_exit(void) -{ - int i; - - for (i = DUART_MAX_CHIP * DUART_MAX_SIDE - 1; i >= 0; i--) { - struct sbd_duart *duart = &sbd_duarts[i / DUART_MAX_SIDE]; - struct sbd_port *sport = &duart->sport[i % DUART_MAX_SIDE]; - struct uart_port *uport = &sport->port; - - if (sport->duart) - uart_remove_one_port(&sbd_reg, uport); - } - - uart_unregister_driver(&sbd_reg); -} - -module_init(sbd_init); -module_exit(sbd_exit); diff --git a/drivers/serial/sc26xx.c b/drivers/serial/sc26xx.c deleted file mode 100644 index 75038ad2b242..000000000000 --- a/drivers/serial/sc26xx.c +++ /dev/null @@ -1,757 +0,0 @@ -/* - * SC268xx.c: Serial driver for Philiphs SC2681/SC2692 devices. - * - * Copyright (C) 2006,2007 Thomas Bogendörfer (tsbogend@alpha.franken.de) - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/major.h> -#include <linux/circ_buf.h> -#include <linux/serial.h> -#include <linux/sysrq.h> -#include <linux/console.h> -#include <linux/spinlock.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/platform_device.h> -#include <linux/irq.h> - -#if defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/serial_core.h> - -#define SC26XX_MAJOR 204 -#define SC26XX_MINOR_START 205 -#define SC26XX_NR 2 - -struct uart_sc26xx_port { - struct uart_port port[2]; - u8 dsr_mask[2]; - u8 cts_mask[2]; - u8 dcd_mask[2]; - u8 ri_mask[2]; - u8 dtr_mask[2]; - u8 rts_mask[2]; - u8 imr; -}; - -/* register common to both ports */ -#define RD_ISR 0x14 -#define RD_IPR 0x34 - -#define WR_ACR 0x10 -#define WR_IMR 0x14 -#define WR_OPCR 0x34 -#define WR_OPR_SET 0x38 -#define WR_OPR_CLR 0x3C - -/* access common register */ -#define READ_SC(p, r) readb((p)->membase + RD_##r) -#define WRITE_SC(p, r, v) writeb((v), (p)->membase + WR_##r) - -/* register per port */ -#define RD_PORT_MRx 0x00 -#define RD_PORT_SR 0x04 -#define RD_PORT_RHR 0x0c - -#define WR_PORT_MRx 0x00 -#define WR_PORT_CSR 0x04 -#define WR_PORT_CR 0x08 -#define WR_PORT_THR 0x0c - -/* SR bits */ -#define SR_BREAK (1 << 7) -#define SR_FRAME (1 << 6) -#define SR_PARITY (1 << 5) -#define SR_OVERRUN (1 << 4) -#define SR_TXRDY (1 << 2) -#define SR_RXRDY (1 << 0) - -#define CR_RES_MR (1 << 4) -#define CR_RES_RX (2 << 4) -#define CR_RES_TX (3 << 4) -#define CR_STRT_BRK (6 << 4) -#define CR_STOP_BRK (7 << 4) -#define CR_DIS_TX (1 << 3) -#define CR_ENA_TX (1 << 2) -#define CR_DIS_RX (1 << 1) -#define CR_ENA_RX (1 << 0) - -/* ISR bits */ -#define ISR_RXRDYB (1 << 5) -#define ISR_TXRDYB (1 << 4) -#define ISR_RXRDYA (1 << 1) -#define ISR_TXRDYA (1 << 0) - -/* IMR bits */ -#define IMR_RXRDY (1 << 1) -#define IMR_TXRDY (1 << 0) - -/* access port register */ -static inline u8 read_sc_port(struct uart_port *p, u8 reg) -{ - return readb(p->membase + p->line * 0x20 + reg); -} - -static inline void write_sc_port(struct uart_port *p, u8 reg, u8 val) -{ - writeb(val, p->membase + p->line * 0x20 + reg); -} - -#define READ_SC_PORT(p, r) read_sc_port(p, RD_PORT_##r) -#define WRITE_SC_PORT(p, r, v) write_sc_port(p, WR_PORT_##r, v) - -static void sc26xx_enable_irq(struct uart_port *port, int mask) -{ - struct uart_sc26xx_port *up; - int line = port->line; - - port -= line; - up = container_of(port, struct uart_sc26xx_port, port[0]); - - up->imr |= mask << (line * 4); - WRITE_SC(port, IMR, up->imr); -} - -static void sc26xx_disable_irq(struct uart_port *port, int mask) -{ - struct uart_sc26xx_port *up; - int line = port->line; - - port -= line; - up = container_of(port, struct uart_sc26xx_port, port[0]); - - up->imr &= ~(mask << (line * 4)); - WRITE_SC(port, IMR, up->imr); -} - -static struct tty_struct *receive_chars(struct uart_port *port) -{ - struct tty_struct *tty = NULL; - int limit = 10000; - unsigned char ch; - char flag; - u8 status; - - if (port->state != NULL) /* Unopened serial console */ - tty = port->state->port.tty; - - while (limit-- > 0) { - status = READ_SC_PORT(port, SR); - if (!(status & SR_RXRDY)) - break; - ch = READ_SC_PORT(port, RHR); - - flag = TTY_NORMAL; - port->icount.rx++; - - if (unlikely(status & (SR_BREAK | SR_FRAME | - SR_PARITY | SR_OVERRUN))) { - if (status & SR_BREAK) { - status &= ~(SR_PARITY | SR_FRAME); - port->icount.brk++; - if (uart_handle_break(port)) - continue; - } else if (status & SR_PARITY) - port->icount.parity++; - else if (status & SR_FRAME) - port->icount.frame++; - if (status & SR_OVERRUN) - port->icount.overrun++; - - status &= port->read_status_mask; - if (status & SR_BREAK) - flag = TTY_BREAK; - else if (status & SR_PARITY) - flag = TTY_PARITY; - else if (status & SR_FRAME) - flag = TTY_FRAME; - } - - if (uart_handle_sysrq_char(port, ch)) - continue; - - if (status & port->ignore_status_mask) - continue; - - tty_insert_flip_char(tty, ch, flag); - } - return tty; -} - -static void transmit_chars(struct uart_port *port) -{ - struct circ_buf *xmit; - - if (!port->state) - return; - - xmit = &port->state->xmit; - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - sc26xx_disable_irq(port, IMR_TXRDY); - return; - } - while (!uart_circ_empty(xmit)) { - if (!(READ_SC_PORT(port, SR) & SR_TXRDY)) - break; - - WRITE_SC_PORT(port, THR, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - } - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); -} - -static irqreturn_t sc26xx_interrupt(int irq, void *dev_id) -{ - struct uart_sc26xx_port *up = dev_id; - struct tty_struct *tty; - unsigned long flags; - u8 isr; - - spin_lock_irqsave(&up->port[0].lock, flags); - - tty = NULL; - isr = READ_SC(&up->port[0], ISR); - if (isr & ISR_TXRDYA) - transmit_chars(&up->port[0]); - if (isr & ISR_RXRDYA) - tty = receive_chars(&up->port[0]); - - spin_unlock(&up->port[0].lock); - - if (tty) - tty_flip_buffer_push(tty); - - spin_lock(&up->port[1].lock); - - tty = NULL; - if (isr & ISR_TXRDYB) - transmit_chars(&up->port[1]); - if (isr & ISR_RXRDYB) - tty = receive_chars(&up->port[1]); - - spin_unlock_irqrestore(&up->port[1].lock, flags); - - if (tty) - tty_flip_buffer_push(tty); - - return IRQ_HANDLED; -} - -/* port->lock is not held. */ -static unsigned int sc26xx_tx_empty(struct uart_port *port) -{ - return (READ_SC_PORT(port, SR) & SR_TXRDY) ? TIOCSER_TEMT : 0; -} - -/* port->lock held by caller. */ -static void sc26xx_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct uart_sc26xx_port *up; - int line = port->line; - - port -= line; - up = container_of(port, struct uart_sc26xx_port, port[0]); - - if (up->dtr_mask[line]) { - if (mctrl & TIOCM_DTR) - WRITE_SC(port, OPR_SET, up->dtr_mask[line]); - else - WRITE_SC(port, OPR_CLR, up->dtr_mask[line]); - } - if (up->rts_mask[line]) { - if (mctrl & TIOCM_RTS) - WRITE_SC(port, OPR_SET, up->rts_mask[line]); - else - WRITE_SC(port, OPR_CLR, up->rts_mask[line]); - } -} - -/* port->lock is held by caller and interrupts are disabled. */ -static unsigned int sc26xx_get_mctrl(struct uart_port *port) -{ - struct uart_sc26xx_port *up; - int line = port->line; - unsigned int mctrl = TIOCM_DSR | TIOCM_CTS | TIOCM_CAR; - u8 ipr; - - port -= line; - up = container_of(port, struct uart_sc26xx_port, port[0]); - ipr = READ_SC(port, IPR) ^ 0xff; - - if (up->dsr_mask[line]) { - mctrl &= ~TIOCM_DSR; - mctrl |= ipr & up->dsr_mask[line] ? TIOCM_DSR : 0; - } - if (up->cts_mask[line]) { - mctrl &= ~TIOCM_CTS; - mctrl |= ipr & up->cts_mask[line] ? TIOCM_CTS : 0; - } - if (up->dcd_mask[line]) { - mctrl &= ~TIOCM_CAR; - mctrl |= ipr & up->dcd_mask[line] ? TIOCM_CAR : 0; - } - if (up->ri_mask[line]) { - mctrl &= ~TIOCM_RNG; - mctrl |= ipr & up->ri_mask[line] ? TIOCM_RNG : 0; - } - return mctrl; -} - -/* port->lock held by caller. */ -static void sc26xx_stop_tx(struct uart_port *port) -{ - return; -} - -/* port->lock held by caller. */ -static void sc26xx_start_tx(struct uart_port *port) -{ - struct circ_buf *xmit = &port->state->xmit; - - while (!uart_circ_empty(xmit)) { - if (!(READ_SC_PORT(port, SR) & SR_TXRDY)) { - sc26xx_enable_irq(port, IMR_TXRDY); - break; - } - WRITE_SC_PORT(port, THR, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - } -} - -/* port->lock held by caller. */ -static void sc26xx_stop_rx(struct uart_port *port) -{ -} - -/* port->lock held by caller. */ -static void sc26xx_enable_ms(struct uart_port *port) -{ -} - -/* port->lock is not held. */ -static void sc26xx_break_ctl(struct uart_port *port, int break_state) -{ - if (break_state == -1) - WRITE_SC_PORT(port, CR, CR_STRT_BRK); - else - WRITE_SC_PORT(port, CR, CR_STOP_BRK); -} - -/* port->lock is not held. */ -static int sc26xx_startup(struct uart_port *port) -{ - sc26xx_disable_irq(port, IMR_TXRDY | IMR_RXRDY); - WRITE_SC(port, OPCR, 0); - - /* reset tx and rx */ - WRITE_SC_PORT(port, CR, CR_RES_RX); - WRITE_SC_PORT(port, CR, CR_RES_TX); - - /* start rx/tx */ - WRITE_SC_PORT(port, CR, CR_ENA_TX | CR_ENA_RX); - - /* enable irqs */ - sc26xx_enable_irq(port, IMR_RXRDY); - return 0; -} - -/* port->lock is not held. */ -static void sc26xx_shutdown(struct uart_port *port) -{ - /* disable interrupst */ - sc26xx_disable_irq(port, IMR_TXRDY | IMR_RXRDY); - - /* stop tx/rx */ - WRITE_SC_PORT(port, CR, CR_DIS_TX | CR_DIS_RX); -} - -/* port->lock is not held. */ -static void sc26xx_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - unsigned int baud = uart_get_baud_rate(port, termios, old, 0, 4000000); - unsigned int quot = uart_get_divisor(port, baud); - unsigned int iflag, cflag; - unsigned long flags; - u8 mr1, mr2, csr; - - spin_lock_irqsave(&port->lock, flags); - - while ((READ_SC_PORT(port, SR) & ((1 << 3) | (1 << 2))) != 0xc) - udelay(2); - - WRITE_SC_PORT(port, CR, CR_DIS_TX | CR_DIS_RX); - - iflag = termios->c_iflag; - cflag = termios->c_cflag; - - port->read_status_mask = SR_OVERRUN; - if (iflag & INPCK) - port->read_status_mask |= SR_PARITY | SR_FRAME; - if (iflag & (BRKINT | PARMRK)) - port->read_status_mask |= SR_BREAK; - - port->ignore_status_mask = 0; - if (iflag & IGNBRK) - port->ignore_status_mask |= SR_BREAK; - if ((cflag & CREAD) == 0) - port->ignore_status_mask |= SR_BREAK | SR_FRAME | - SR_PARITY | SR_OVERRUN; - - switch (cflag & CSIZE) { - case CS5: - mr1 = 0x00; - break; - case CS6: - mr1 = 0x01; - break; - case CS7: - mr1 = 0x02; - break; - default: - case CS8: - mr1 = 0x03; - break; - } - mr2 = 0x07; - if (cflag & CSTOPB) - mr2 = 0x0f; - if (cflag & PARENB) { - if (cflag & PARODD) - mr1 |= (1 << 2); - } else - mr1 |= (2 << 3); - - switch (baud) { - case 50: - csr = 0x00; - break; - case 110: - csr = 0x11; - break; - case 134: - csr = 0x22; - break; - case 200: - csr = 0x33; - break; - case 300: - csr = 0x44; - break; - case 600: - csr = 0x55; - break; - case 1200: - csr = 0x66; - break; - case 2400: - csr = 0x88; - break; - case 4800: - csr = 0x99; - break; - default: - case 9600: - csr = 0xbb; - break; - case 19200: - csr = 0xcc; - break; - } - - WRITE_SC_PORT(port, CR, CR_RES_MR); - WRITE_SC_PORT(port, MRx, mr1); - WRITE_SC_PORT(port, MRx, mr2); - - WRITE_SC(port, ACR, 0x80); - WRITE_SC_PORT(port, CSR, csr); - - /* reset tx and rx */ - WRITE_SC_PORT(port, CR, CR_RES_RX); - WRITE_SC_PORT(port, CR, CR_RES_TX); - - WRITE_SC_PORT(port, CR, CR_ENA_TX | CR_ENA_RX); - while ((READ_SC_PORT(port, SR) & ((1 << 3) | (1 << 2))) != 0xc) - udelay(2); - - /* XXX */ - uart_update_timeout(port, cflag, - (port->uartclk / (16 * quot))); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *sc26xx_type(struct uart_port *port) -{ - return "SC26XX"; -} - -static void sc26xx_release_port(struct uart_port *port) -{ -} - -static int sc26xx_request_port(struct uart_port *port) -{ - return 0; -} - -static void sc26xx_config_port(struct uart_port *port, int flags) -{ -} - -static int sc26xx_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - return -EINVAL; -} - -static struct uart_ops sc26xx_ops = { - .tx_empty = sc26xx_tx_empty, - .set_mctrl = sc26xx_set_mctrl, - .get_mctrl = sc26xx_get_mctrl, - .stop_tx = sc26xx_stop_tx, - .start_tx = sc26xx_start_tx, - .stop_rx = sc26xx_stop_rx, - .enable_ms = sc26xx_enable_ms, - .break_ctl = sc26xx_break_ctl, - .startup = sc26xx_startup, - .shutdown = sc26xx_shutdown, - .set_termios = sc26xx_set_termios, - .type = sc26xx_type, - .release_port = sc26xx_release_port, - .request_port = sc26xx_request_port, - .config_port = sc26xx_config_port, - .verify_port = sc26xx_verify_port, -}; - -static struct uart_port *sc26xx_port; - -#ifdef CONFIG_SERIAL_SC26XX_CONSOLE -static void sc26xx_console_putchar(struct uart_port *port, char c) -{ - unsigned long flags; - int limit = 1000000; - - spin_lock_irqsave(&port->lock, flags); - - while (limit-- > 0) { - if (READ_SC_PORT(port, SR) & SR_TXRDY) { - WRITE_SC_PORT(port, THR, c); - break; - } - udelay(2); - } - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void sc26xx_console_write(struct console *con, const char *s, unsigned n) -{ - struct uart_port *port = sc26xx_port; - int i; - - for (i = 0; i < n; i++) { - if (*s == '\n') - sc26xx_console_putchar(port, '\r'); - sc26xx_console_putchar(port, *s++); - } -} - -static int __init sc26xx_console_setup(struct console *con, char *options) -{ - struct uart_port *port = sc26xx_port; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - if (port->type != PORT_SC26XX) - return -1; - - printk(KERN_INFO "Console: ttySC%d (SC26XX)\n", con->index); - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(port, con, baud, parity, bits, flow); -} - -static struct uart_driver sc26xx_reg; -static struct console sc26xx_console = { - .name = "ttySC", - .write = sc26xx_console_write, - .device = uart_console_device, - .setup = sc26xx_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &sc26xx_reg, -}; -#define SC26XX_CONSOLE &sc26xx_console -#else -#define SC26XX_CONSOLE NULL -#endif - -static struct uart_driver sc26xx_reg = { - .owner = THIS_MODULE, - .driver_name = "SC26xx", - .dev_name = "ttySC", - .major = SC26XX_MAJOR, - .minor = SC26XX_MINOR_START, - .nr = SC26XX_NR, - .cons = SC26XX_CONSOLE, -}; - -static u8 sc26xx_flags2mask(unsigned int flags, unsigned int bitpos) -{ - unsigned int bit = (flags >> bitpos) & 15; - - return bit ? (1 << (bit - 1)) : 0; -} - -static void __devinit sc26xx_init_masks(struct uart_sc26xx_port *up, - int line, unsigned int data) -{ - up->dtr_mask[line] = sc26xx_flags2mask(data, 0); - up->rts_mask[line] = sc26xx_flags2mask(data, 4); - up->dsr_mask[line] = sc26xx_flags2mask(data, 8); - up->cts_mask[line] = sc26xx_flags2mask(data, 12); - up->dcd_mask[line] = sc26xx_flags2mask(data, 16); - up->ri_mask[line] = sc26xx_flags2mask(data, 20); -} - -static int __devinit sc26xx_probe(struct platform_device *dev) -{ - struct resource *res; - struct uart_sc26xx_port *up; - unsigned int *sc26xx_data = dev->dev.platform_data; - int err; - - res = platform_get_resource(dev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; - - up = kzalloc(sizeof *up, GFP_KERNEL); - if (unlikely(!up)) - return -ENOMEM; - - up->port[0].line = 0; - up->port[0].ops = &sc26xx_ops; - up->port[0].type = PORT_SC26XX; - up->port[0].uartclk = (29491200 / 16); /* arbitrary */ - - up->port[0].mapbase = res->start; - up->port[0].membase = ioremap_nocache(up->port[0].mapbase, 0x40); - up->port[0].iotype = UPIO_MEM; - up->port[0].irq = platform_get_irq(dev, 0); - - up->port[0].dev = &dev->dev; - - sc26xx_init_masks(up, 0, sc26xx_data[0]); - - sc26xx_port = &up->port[0]; - - up->port[1].line = 1; - up->port[1].ops = &sc26xx_ops; - up->port[1].type = PORT_SC26XX; - up->port[1].uartclk = (29491200 / 16); /* arbitrary */ - - up->port[1].mapbase = up->port[0].mapbase; - up->port[1].membase = up->port[0].membase; - up->port[1].iotype = UPIO_MEM; - up->port[1].irq = up->port[0].irq; - - up->port[1].dev = &dev->dev; - - sc26xx_init_masks(up, 1, sc26xx_data[1]); - - err = uart_register_driver(&sc26xx_reg); - if (err) - goto out_free_port; - - sc26xx_reg.tty_driver->name_base = sc26xx_reg.minor; - - err = uart_add_one_port(&sc26xx_reg, &up->port[0]); - if (err) - goto out_unregister_driver; - - err = uart_add_one_port(&sc26xx_reg, &up->port[1]); - if (err) - goto out_remove_port0; - - err = request_irq(up->port[0].irq, sc26xx_interrupt, 0, "sc26xx", up); - if (err) - goto out_remove_ports; - - dev_set_drvdata(&dev->dev, up); - return 0; - -out_remove_ports: - uart_remove_one_port(&sc26xx_reg, &up->port[1]); -out_remove_port0: - uart_remove_one_port(&sc26xx_reg, &up->port[0]); - -out_unregister_driver: - uart_unregister_driver(&sc26xx_reg); - -out_free_port: - kfree(up); - sc26xx_port = NULL; - return err; -} - - -static int __exit sc26xx_driver_remove(struct platform_device *dev) -{ - struct uart_sc26xx_port *up = dev_get_drvdata(&dev->dev); - - free_irq(up->port[0].irq, up); - - uart_remove_one_port(&sc26xx_reg, &up->port[0]); - uart_remove_one_port(&sc26xx_reg, &up->port[1]); - - uart_unregister_driver(&sc26xx_reg); - - kfree(up); - sc26xx_port = NULL; - - dev_set_drvdata(&dev->dev, NULL); - return 0; -} - -static struct platform_driver sc26xx_driver = { - .probe = sc26xx_probe, - .remove = __devexit_p(sc26xx_driver_remove), - .driver = { - .name = "SC26xx", - .owner = THIS_MODULE, - }, -}; - -static int __init sc26xx_init(void) -{ - return platform_driver_register(&sc26xx_driver); -} - -static void __exit sc26xx_exit(void) -{ - platform_driver_unregister(&sc26xx_driver); -} - -module_init(sc26xx_init); -module_exit(sc26xx_exit); - - -MODULE_AUTHOR("Thomas Bogendörfer"); -MODULE_DESCRIPTION("SC681/SC2692 serial driver"); -MODULE_VERSION("1.0"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:SC26xx"); diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c deleted file mode 100644 index 460a72d91bb7..000000000000 --- a/drivers/serial/serial_core.c +++ /dev/null @@ -1,2578 +0,0 @@ -/* - * linux/drivers/char/core.c - * - * Driver core for serial ports - * - * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. - * - * Copyright 1999 ARM Limited - * Copyright (C) 2000-2001 Deep Blue Solutions Ltd. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ -#include <linux/module.h> -#include <linux/tty.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/proc_fs.h> -#include <linux/seq_file.h> -#include <linux/device.h> -#include <linux/serial.h> /* for serial_state and serial_icounter_struct */ -#include <linux/serial_core.h> -#include <linux/delay.h> -#include <linux/mutex.h> - -#include <asm/irq.h> -#include <asm/uaccess.h> - -/* - * This is used to lock changes in serial line configuration. - */ -static DEFINE_MUTEX(port_mutex); - -/* - * lockdep: port->lock is initialized in two places, but we - * want only one lock-class: - */ -static struct lock_class_key port_lock_key; - -#define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8) - -#ifdef CONFIG_SERIAL_CORE_CONSOLE -#define uart_console(port) ((port)->cons && (port)->cons->index == (port)->line) -#else -#define uart_console(port) (0) -#endif - -static void uart_change_speed(struct tty_struct *tty, struct uart_state *state, - struct ktermios *old_termios); -static void __uart_wait_until_sent(struct uart_port *port, int timeout); -static void uart_change_pm(struct uart_state *state, int pm_state); - -/* - * This routine is used by the interrupt handler to schedule processing in - * the software interrupt portion of the driver. - */ -void uart_write_wakeup(struct uart_port *port) -{ - struct uart_state *state = port->state; - /* - * This means you called this function _after_ the port was - * closed. No cookie for you. - */ - BUG_ON(!state); - tasklet_schedule(&state->tlet); -} - -static void uart_stop(struct tty_struct *tty) -{ - struct uart_state *state = tty->driver_data; - struct uart_port *port = state->uart_port; - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - port->ops->stop_tx(port); - spin_unlock_irqrestore(&port->lock, flags); -} - -static void __uart_start(struct tty_struct *tty) -{ - struct uart_state *state = tty->driver_data; - struct uart_port *port = state->uart_port; - - if (!uart_circ_empty(&state->xmit) && state->xmit.buf && - !tty->stopped && !tty->hw_stopped) - port->ops->start_tx(port); -} - -static void uart_start(struct tty_struct *tty) -{ - struct uart_state *state = tty->driver_data; - struct uart_port *port = state->uart_port; - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - __uart_start(tty); - spin_unlock_irqrestore(&port->lock, flags); -} - -static void uart_tasklet_action(unsigned long data) -{ - struct uart_state *state = (struct uart_state *)data; - tty_wakeup(state->port.tty); -} - -static inline void -uart_update_mctrl(struct uart_port *port, unsigned int set, unsigned int clear) -{ - unsigned long flags; - unsigned int old; - - spin_lock_irqsave(&port->lock, flags); - old = port->mctrl; - port->mctrl = (old & ~clear) | set; - if (old != port->mctrl) - port->ops->set_mctrl(port, port->mctrl); - spin_unlock_irqrestore(&port->lock, flags); -} - -#define uart_set_mctrl(port, set) uart_update_mctrl(port, set, 0) -#define uart_clear_mctrl(port, clear) uart_update_mctrl(port, 0, clear) - -/* - * Startup the port. This will be called once per open. All calls - * will be serialised by the per-port mutex. - */ -static int uart_startup(struct tty_struct *tty, struct uart_state *state, int init_hw) -{ - struct uart_port *uport = state->uart_port; - struct tty_port *port = &state->port; - unsigned long page; - int retval = 0; - - if (port->flags & ASYNC_INITIALIZED) - return 0; - - /* - * Set the TTY IO error marker - we will only clear this - * once we have successfully opened the port. Also set - * up the tty->alt_speed kludge - */ - set_bit(TTY_IO_ERROR, &tty->flags); - - if (uport->type == PORT_UNKNOWN) - return 0; - - /* - * Initialise and allocate the transmit and temporary - * buffer. - */ - if (!state->xmit.buf) { - /* This is protected by the per port mutex */ - page = get_zeroed_page(GFP_KERNEL); - if (!page) - return -ENOMEM; - - state->xmit.buf = (unsigned char *) page; - uart_circ_clear(&state->xmit); - } - - retval = uport->ops->startup(uport); - if (retval == 0) { - if (init_hw) { - /* - * Initialise the hardware port settings. - */ - uart_change_speed(tty, state, NULL); - - /* - * Setup the RTS and DTR signals once the - * port is open and ready to respond. - */ - if (tty->termios->c_cflag & CBAUD) - uart_set_mctrl(uport, TIOCM_RTS | TIOCM_DTR); - } - - if (port->flags & ASYNC_CTS_FLOW) { - spin_lock_irq(&uport->lock); - if (!(uport->ops->get_mctrl(uport) & TIOCM_CTS)) - tty->hw_stopped = 1; - spin_unlock_irq(&uport->lock); - } - - set_bit(ASYNCB_INITIALIZED, &port->flags); - - clear_bit(TTY_IO_ERROR, &tty->flags); - } - - if (retval && capable(CAP_SYS_ADMIN)) - retval = 0; - - return retval; -} - -/* - * This routine will shutdown a serial port; interrupts are disabled, and - * DTR is dropped if the hangup on close termio flag is on. Calls to - * uart_shutdown are serialised by the per-port semaphore. - */ -static void uart_shutdown(struct tty_struct *tty, struct uart_state *state) -{ - struct uart_port *uport = state->uart_port; - struct tty_port *port = &state->port; - - /* - * Set the TTY IO error marker - */ - if (tty) - set_bit(TTY_IO_ERROR, &tty->flags); - - if (test_and_clear_bit(ASYNCB_INITIALIZED, &port->flags)) { - /* - * Turn off DTR and RTS early. - */ - if (!tty || (tty->termios->c_cflag & HUPCL)) - uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS); - - /* - * clear delta_msr_wait queue to avoid mem leaks: we may free - * the irq here so the queue might never be woken up. Note - * that we won't end up waiting on delta_msr_wait again since - * any outstanding file descriptors should be pointing at - * hung_up_tty_fops now. - */ - wake_up_interruptible(&port->delta_msr_wait); - - /* - * Free the IRQ and disable the port. - */ - uport->ops->shutdown(uport); - - /* - * Ensure that the IRQ handler isn't running on another CPU. - */ - synchronize_irq(uport->irq); - } - - /* - * kill off our tasklet - */ - tasklet_kill(&state->tlet); - - /* - * Free the transmit buffer page. - */ - if (state->xmit.buf) { - free_page((unsigned long)state->xmit.buf); - state->xmit.buf = NULL; - } -} - -/** - * uart_update_timeout - update per-port FIFO timeout. - * @port: uart_port structure describing the port - * @cflag: termios cflag value - * @baud: speed of the port - * - * Set the port FIFO timeout value. The @cflag value should - * reflect the actual hardware settings. - */ -void -uart_update_timeout(struct uart_port *port, unsigned int cflag, - unsigned int baud) -{ - unsigned int bits; - - /* byte size and parity */ - switch (cflag & CSIZE) { - case CS5: - bits = 7; - break; - case CS6: - bits = 8; - break; - case CS7: - bits = 9; - break; - default: - bits = 10; - break; /* CS8 */ - } - - if (cflag & CSTOPB) - bits++; - if (cflag & PARENB) - bits++; - - /* - * The total number of bits to be transmitted in the fifo. - */ - bits = bits * port->fifosize; - - /* - * Figure the timeout to send the above number of bits. - * Add .02 seconds of slop - */ - port->timeout = (HZ * bits) / baud + HZ/50; -} - -EXPORT_SYMBOL(uart_update_timeout); - -/** - * uart_get_baud_rate - return baud rate for a particular port - * @port: uart_port structure describing the port in question. - * @termios: desired termios settings. - * @old: old termios (or NULL) - * @min: minimum acceptable baud rate - * @max: maximum acceptable baud rate - * - * Decode the termios structure into a numeric baud rate, - * taking account of the magic 38400 baud rate (with spd_* - * flags), and mapping the %B0 rate to 9600 baud. - * - * If the new baud rate is invalid, try the old termios setting. - * If it's still invalid, we try 9600 baud. - * - * Update the @termios structure to reflect the baud rate - * we're actually going to be using. Don't do this for the case - * where B0 is requested ("hang up"). - */ -unsigned int -uart_get_baud_rate(struct uart_port *port, struct ktermios *termios, - struct ktermios *old, unsigned int min, unsigned int max) -{ - unsigned int try, baud, altbaud = 38400; - int hung_up = 0; - upf_t flags = port->flags & UPF_SPD_MASK; - - if (flags == UPF_SPD_HI) - altbaud = 57600; - else if (flags == UPF_SPD_VHI) - altbaud = 115200; - else if (flags == UPF_SPD_SHI) - altbaud = 230400; - else if (flags == UPF_SPD_WARP) - altbaud = 460800; - - for (try = 0; try < 2; try++) { - baud = tty_termios_baud_rate(termios); - - /* - * The spd_hi, spd_vhi, spd_shi, spd_warp kludge... - * Die! Die! Die! - */ - if (baud == 38400) - baud = altbaud; - - /* - * Special case: B0 rate. - */ - if (baud == 0) { - hung_up = 1; - baud = 9600; - } - - if (baud >= min && baud <= max) - return baud; - - /* - * Oops, the quotient was zero. Try again with - * the old baud rate if possible. - */ - termios->c_cflag &= ~CBAUD; - if (old) { - baud = tty_termios_baud_rate(old); - if (!hung_up) - tty_termios_encode_baud_rate(termios, - baud, baud); - old = NULL; - continue; - } - - /* - * As a last resort, if the range cannot be met then clip to - * the nearest chip supported rate. - */ - if (!hung_up) { - if (baud <= min) - tty_termios_encode_baud_rate(termios, - min + 1, min + 1); - else - tty_termios_encode_baud_rate(termios, - max - 1, max - 1); - } - } - /* Should never happen */ - WARN_ON(1); - return 0; -} - -EXPORT_SYMBOL(uart_get_baud_rate); - -/** - * uart_get_divisor - return uart clock divisor - * @port: uart_port structure describing the port. - * @baud: desired baud rate - * - * Calculate the uart clock divisor for the port. - */ -unsigned int -uart_get_divisor(struct uart_port *port, unsigned int baud) -{ - unsigned int quot; - - /* - * Old custom speed handling. - */ - if (baud == 38400 && (port->flags & UPF_SPD_MASK) == UPF_SPD_CUST) - quot = port->custom_divisor; - else - quot = (port->uartclk + (8 * baud)) / (16 * baud); - - return quot; -} - -EXPORT_SYMBOL(uart_get_divisor); - -/* FIXME: Consistent locking policy */ -static void uart_change_speed(struct tty_struct *tty, struct uart_state *state, - struct ktermios *old_termios) -{ - struct tty_port *port = &state->port; - struct uart_port *uport = state->uart_port; - struct ktermios *termios; - - /* - * If we have no tty, termios, or the port does not exist, - * then we can't set the parameters for this port. - */ - if (!tty || !tty->termios || uport->type == PORT_UNKNOWN) - return; - - termios = tty->termios; - - /* - * Set flags based on termios cflag - */ - if (termios->c_cflag & CRTSCTS) - set_bit(ASYNCB_CTS_FLOW, &port->flags); - else - clear_bit(ASYNCB_CTS_FLOW, &port->flags); - - if (termios->c_cflag & CLOCAL) - clear_bit(ASYNCB_CHECK_CD, &port->flags); - else - set_bit(ASYNCB_CHECK_CD, &port->flags); - - uport->ops->set_termios(uport, termios, old_termios); -} - -static inline int __uart_put_char(struct uart_port *port, - struct circ_buf *circ, unsigned char c) -{ - unsigned long flags; - int ret = 0; - - if (!circ->buf) - return 0; - - spin_lock_irqsave(&port->lock, flags); - if (uart_circ_chars_free(circ) != 0) { - circ->buf[circ->head] = c; - circ->head = (circ->head + 1) & (UART_XMIT_SIZE - 1); - ret = 1; - } - spin_unlock_irqrestore(&port->lock, flags); - return ret; -} - -static int uart_put_char(struct tty_struct *tty, unsigned char ch) -{ - struct uart_state *state = tty->driver_data; - - return __uart_put_char(state->uart_port, &state->xmit, ch); -} - -static void uart_flush_chars(struct tty_struct *tty) -{ - uart_start(tty); -} - -static int uart_write(struct tty_struct *tty, - const unsigned char *buf, int count) -{ - struct uart_state *state = tty->driver_data; - struct uart_port *port; - struct circ_buf *circ; - unsigned long flags; - int c, ret = 0; - - /* - * This means you called this function _after_ the port was - * closed. No cookie for you. - */ - if (!state) { - WARN_ON(1); - return -EL3HLT; - } - - port = state->uart_port; - circ = &state->xmit; - - if (!circ->buf) - return 0; - - spin_lock_irqsave(&port->lock, flags); - while (1) { - c = CIRC_SPACE_TO_END(circ->head, circ->tail, UART_XMIT_SIZE); - if (count < c) - c = count; - if (c <= 0) - break; - memcpy(circ->buf + circ->head, buf, c); - circ->head = (circ->head + c) & (UART_XMIT_SIZE - 1); - buf += c; - count -= c; - ret += c; - } - spin_unlock_irqrestore(&port->lock, flags); - - uart_start(tty); - return ret; -} - -static int uart_write_room(struct tty_struct *tty) -{ - struct uart_state *state = tty->driver_data; - unsigned long flags; - int ret; - - spin_lock_irqsave(&state->uart_port->lock, flags); - ret = uart_circ_chars_free(&state->xmit); - spin_unlock_irqrestore(&state->uart_port->lock, flags); - return ret; -} - -static int uart_chars_in_buffer(struct tty_struct *tty) -{ - struct uart_state *state = tty->driver_data; - unsigned long flags; - int ret; - - spin_lock_irqsave(&state->uart_port->lock, flags); - ret = uart_circ_chars_pending(&state->xmit); - spin_unlock_irqrestore(&state->uart_port->lock, flags); - return ret; -} - -static void uart_flush_buffer(struct tty_struct *tty) -{ - struct uart_state *state = tty->driver_data; - struct uart_port *port; - unsigned long flags; - - /* - * This means you called this function _after_ the port was - * closed. No cookie for you. - */ - if (!state) { - WARN_ON(1); - return; - } - - port = state->uart_port; - pr_debug("uart_flush_buffer(%d) called\n", tty->index); - - spin_lock_irqsave(&port->lock, flags); - uart_circ_clear(&state->xmit); - if (port->ops->flush_buffer) - port->ops->flush_buffer(port); - spin_unlock_irqrestore(&port->lock, flags); - tty_wakeup(tty); -} - -/* - * This function is used to send a high-priority XON/XOFF character to - * the device - */ -static void uart_send_xchar(struct tty_struct *tty, char ch) -{ - struct uart_state *state = tty->driver_data; - struct uart_port *port = state->uart_port; - unsigned long flags; - - if (port->ops->send_xchar) - port->ops->send_xchar(port, ch); - else { - port->x_char = ch; - if (ch) { - spin_lock_irqsave(&port->lock, flags); - port->ops->start_tx(port); - spin_unlock_irqrestore(&port->lock, flags); - } - } -} - -static void uart_throttle(struct tty_struct *tty) -{ - struct uart_state *state = tty->driver_data; - - if (I_IXOFF(tty)) - uart_send_xchar(tty, STOP_CHAR(tty)); - - if (tty->termios->c_cflag & CRTSCTS) - uart_clear_mctrl(state->uart_port, TIOCM_RTS); -} - -static void uart_unthrottle(struct tty_struct *tty) -{ - struct uart_state *state = tty->driver_data; - struct uart_port *port = state->uart_port; - - if (I_IXOFF(tty)) { - if (port->x_char) - port->x_char = 0; - else - uart_send_xchar(tty, START_CHAR(tty)); - } - - if (tty->termios->c_cflag & CRTSCTS) - uart_set_mctrl(port, TIOCM_RTS); -} - -static int uart_get_info(struct uart_state *state, - struct serial_struct __user *retinfo) -{ - struct uart_port *uport = state->uart_port; - struct tty_port *port = &state->port; - struct serial_struct tmp; - - memset(&tmp, 0, sizeof(tmp)); - - /* Ensure the state we copy is consistent and no hardware changes - occur as we go */ - mutex_lock(&port->mutex); - - tmp.type = uport->type; - tmp.line = uport->line; - tmp.port = uport->iobase; - if (HIGH_BITS_OFFSET) - tmp.port_high = (long) uport->iobase >> HIGH_BITS_OFFSET; - tmp.irq = uport->irq; - tmp.flags = uport->flags; - tmp.xmit_fifo_size = uport->fifosize; - tmp.baud_base = uport->uartclk / 16; - tmp.close_delay = port->close_delay / 10; - tmp.closing_wait = port->closing_wait == ASYNC_CLOSING_WAIT_NONE ? - ASYNC_CLOSING_WAIT_NONE : - port->closing_wait / 10; - tmp.custom_divisor = uport->custom_divisor; - tmp.hub6 = uport->hub6; - tmp.io_type = uport->iotype; - tmp.iomem_reg_shift = uport->regshift; - tmp.iomem_base = (void *)(unsigned long)uport->mapbase; - - mutex_unlock(&port->mutex); - - if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) - return -EFAULT; - return 0; -} - -static int uart_set_info(struct tty_struct *tty, struct uart_state *state, - struct serial_struct __user *newinfo) -{ - struct serial_struct new_serial; - struct uart_port *uport = state->uart_port; - struct tty_port *port = &state->port; - unsigned long new_port; - unsigned int change_irq, change_port, closing_wait; - unsigned int old_custom_divisor, close_delay; - upf_t old_flags, new_flags; - int retval = 0; - - if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) - return -EFAULT; - - new_port = new_serial.port; - if (HIGH_BITS_OFFSET) - new_port += (unsigned long) new_serial.port_high << HIGH_BITS_OFFSET; - - new_serial.irq = irq_canonicalize(new_serial.irq); - close_delay = new_serial.close_delay * 10; - closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? - ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10; - - /* - * This semaphore protects port->count. It is also - * very useful to prevent opens. Also, take the - * port configuration semaphore to make sure that a - * module insertion/removal doesn't change anything - * under us. - */ - mutex_lock(&port->mutex); - - change_irq = !(uport->flags & UPF_FIXED_PORT) - && new_serial.irq != uport->irq; - - /* - * Since changing the 'type' of the port changes its resource - * allocations, we should treat type changes the same as - * IO port changes. - */ - change_port = !(uport->flags & UPF_FIXED_PORT) - && (new_port != uport->iobase || - (unsigned long)new_serial.iomem_base != uport->mapbase || - new_serial.hub6 != uport->hub6 || - new_serial.io_type != uport->iotype || - new_serial.iomem_reg_shift != uport->regshift || - new_serial.type != uport->type); - - old_flags = uport->flags; - new_flags = new_serial.flags; - old_custom_divisor = uport->custom_divisor; - - if (!capable(CAP_SYS_ADMIN)) { - retval = -EPERM; - if (change_irq || change_port || - (new_serial.baud_base != uport->uartclk / 16) || - (close_delay != port->close_delay) || - (closing_wait != port->closing_wait) || - (new_serial.xmit_fifo_size && - new_serial.xmit_fifo_size != uport->fifosize) || - (((new_flags ^ old_flags) & ~UPF_USR_MASK) != 0)) - goto exit; - uport->flags = ((uport->flags & ~UPF_USR_MASK) | - (new_flags & UPF_USR_MASK)); - uport->custom_divisor = new_serial.custom_divisor; - goto check_and_exit; - } - - /* - * Ask the low level driver to verify the settings. - */ - if (uport->ops->verify_port) - retval = uport->ops->verify_port(uport, &new_serial); - - if ((new_serial.irq >= nr_irqs) || (new_serial.irq < 0) || - (new_serial.baud_base < 9600)) - retval = -EINVAL; - - if (retval) - goto exit; - - if (change_port || change_irq) { - retval = -EBUSY; - - /* - * Make sure that we are the sole user of this port. - */ - if (tty_port_users(port) > 1) - goto exit; - - /* - * We need to shutdown the serial port at the old - * port/type/irq combination. - */ - uart_shutdown(tty, state); - } - - if (change_port) { - unsigned long old_iobase, old_mapbase; - unsigned int old_type, old_iotype, old_hub6, old_shift; - - old_iobase = uport->iobase; - old_mapbase = uport->mapbase; - old_type = uport->type; - old_hub6 = uport->hub6; - old_iotype = uport->iotype; - old_shift = uport->regshift; - - /* - * Free and release old regions - */ - if (old_type != PORT_UNKNOWN) - uport->ops->release_port(uport); - - uport->iobase = new_port; - uport->type = new_serial.type; - uport->hub6 = new_serial.hub6; - uport->iotype = new_serial.io_type; - uport->regshift = new_serial.iomem_reg_shift; - uport->mapbase = (unsigned long)new_serial.iomem_base; - - /* - * Claim and map the new regions - */ - if (uport->type != PORT_UNKNOWN) { - retval = uport->ops->request_port(uport); - } else { - /* Always success - Jean II */ - retval = 0; - } - - /* - * If we fail to request resources for the - * new port, try to restore the old settings. - */ - if (retval && old_type != PORT_UNKNOWN) { - uport->iobase = old_iobase; - uport->type = old_type; - uport->hub6 = old_hub6; - uport->iotype = old_iotype; - uport->regshift = old_shift; - uport->mapbase = old_mapbase; - retval = uport->ops->request_port(uport); - /* - * If we failed to restore the old settings, - * we fail like this. - */ - if (retval) - uport->type = PORT_UNKNOWN; - - /* - * We failed anyway. - */ - retval = -EBUSY; - /* Added to return the correct error -Ram Gupta */ - goto exit; - } - } - - if (change_irq) - uport->irq = new_serial.irq; - if (!(uport->flags & UPF_FIXED_PORT)) - uport->uartclk = new_serial.baud_base * 16; - uport->flags = (uport->flags & ~UPF_CHANGE_MASK) | - (new_flags & UPF_CHANGE_MASK); - uport->custom_divisor = new_serial.custom_divisor; - port->close_delay = close_delay; - port->closing_wait = closing_wait; - if (new_serial.xmit_fifo_size) - uport->fifosize = new_serial.xmit_fifo_size; - if (port->tty) - port->tty->low_latency = - (uport->flags & UPF_LOW_LATENCY) ? 1 : 0; - - check_and_exit: - retval = 0; - if (uport->type == PORT_UNKNOWN) - goto exit; - if (port->flags & ASYNC_INITIALIZED) { - if (((old_flags ^ uport->flags) & UPF_SPD_MASK) || - old_custom_divisor != uport->custom_divisor) { - /* - * If they're setting up a custom divisor or speed, - * instead of clearing it, then bitch about it. No - * need to rate-limit; it's CAP_SYS_ADMIN only. - */ - if (uport->flags & UPF_SPD_MASK) { - char buf[64]; - printk(KERN_NOTICE - "%s sets custom speed on %s. This " - "is deprecated.\n", current->comm, - tty_name(port->tty, buf)); - } - uart_change_speed(tty, state, NULL); - } - } else - retval = uart_startup(tty, state, 1); - exit: - mutex_unlock(&port->mutex); - return retval; -} - -/** - * uart_get_lsr_info - get line status register info - * @tty: tty associated with the UART - * @state: UART being queried - * @value: returned modem value - * - * Note: uart_ioctl protects us against hangups. - */ -static int uart_get_lsr_info(struct tty_struct *tty, - struct uart_state *state, unsigned int __user *value) -{ - struct uart_port *uport = state->uart_port; - unsigned int result; - - result = uport->ops->tx_empty(uport); - - /* - * If we're about to load something into the transmit - * register, we'll pretend the transmitter isn't empty to - * avoid a race condition (depending on when the transmit - * interrupt happens). - */ - if (uport->x_char || - ((uart_circ_chars_pending(&state->xmit) > 0) && - !tty->stopped && !tty->hw_stopped)) - result &= ~TIOCSER_TEMT; - - return put_user(result, value); -} - -static int uart_tiocmget(struct tty_struct *tty, struct file *file) -{ - struct uart_state *state = tty->driver_data; - struct tty_port *port = &state->port; - struct uart_port *uport = state->uart_port; - int result = -EIO; - - mutex_lock(&port->mutex); - if ((!file || !tty_hung_up_p(file)) && - !(tty->flags & (1 << TTY_IO_ERROR))) { - result = uport->mctrl; - - spin_lock_irq(&uport->lock); - result |= uport->ops->get_mctrl(uport); - spin_unlock_irq(&uport->lock); - } - mutex_unlock(&port->mutex); - - return result; -} - -static int -uart_tiocmset(struct tty_struct *tty, struct file *file, - unsigned int set, unsigned int clear) -{ - struct uart_state *state = tty->driver_data; - struct uart_port *uport = state->uart_port; - struct tty_port *port = &state->port; - int ret = -EIO; - - mutex_lock(&port->mutex); - if ((!file || !tty_hung_up_p(file)) && - !(tty->flags & (1 << TTY_IO_ERROR))) { - uart_update_mctrl(uport, set, clear); - ret = 0; - } - mutex_unlock(&port->mutex); - return ret; -} - -static int uart_break_ctl(struct tty_struct *tty, int break_state) -{ - struct uart_state *state = tty->driver_data; - struct tty_port *port = &state->port; - struct uart_port *uport = state->uart_port; - - mutex_lock(&port->mutex); - - if (uport->type != PORT_UNKNOWN) - uport->ops->break_ctl(uport, break_state); - - mutex_unlock(&port->mutex); - return 0; -} - -static int uart_do_autoconfig(struct tty_struct *tty,struct uart_state *state) -{ - struct uart_port *uport = state->uart_port; - struct tty_port *port = &state->port; - int flags, ret; - - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - - /* - * Take the per-port semaphore. This prevents count from - * changing, and hence any extra opens of the port while - * we're auto-configuring. - */ - if (mutex_lock_interruptible(&port->mutex)) - return -ERESTARTSYS; - - ret = -EBUSY; - if (tty_port_users(port) == 1) { - uart_shutdown(tty, state); - - /* - * If we already have a port type configured, - * we must release its resources. - */ - if (uport->type != PORT_UNKNOWN) - uport->ops->release_port(uport); - - flags = UART_CONFIG_TYPE; - if (uport->flags & UPF_AUTO_IRQ) - flags |= UART_CONFIG_IRQ; - - /* - * This will claim the ports resources if - * a port is found. - */ - uport->ops->config_port(uport, flags); - - ret = uart_startup(tty, state, 1); - } - mutex_unlock(&port->mutex); - return ret; -} - -/* - * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change - * - mask passed in arg for lines of interest - * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) - * Caller should use TIOCGICOUNT to see which one it was - * - * FIXME: This wants extracting into a common all driver implementation - * of TIOCMWAIT using tty_port. - */ -static int -uart_wait_modem_status(struct uart_state *state, unsigned long arg) -{ - struct uart_port *uport = state->uart_port; - struct tty_port *port = &state->port; - DECLARE_WAITQUEUE(wait, current); - struct uart_icount cprev, cnow; - int ret; - - /* - * note the counters on entry - */ - spin_lock_irq(&uport->lock); - memcpy(&cprev, &uport->icount, sizeof(struct uart_icount)); - - /* - * Force modem status interrupts on - */ - uport->ops->enable_ms(uport); - spin_unlock_irq(&uport->lock); - - add_wait_queue(&port->delta_msr_wait, &wait); - for (;;) { - spin_lock_irq(&uport->lock); - memcpy(&cnow, &uport->icount, sizeof(struct uart_icount)); - spin_unlock_irq(&uport->lock); - - set_current_state(TASK_INTERRUPTIBLE); - - if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || - ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || - ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || - ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { - ret = 0; - break; - } - - schedule(); - - /* see if a signal did it */ - if (signal_pending(current)) { - ret = -ERESTARTSYS; - break; - } - - cprev = cnow; - } - - current->state = TASK_RUNNING; - remove_wait_queue(&port->delta_msr_wait, &wait); - - return ret; -} - -/* - * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) - * Return: write counters to the user passed counter struct - * NB: both 1->0 and 0->1 transitions are counted except for - * RI where only 0->1 is counted. - */ -static int uart_get_icount(struct tty_struct *tty, - struct serial_icounter_struct *icount) -{ - struct uart_state *state = tty->driver_data; - struct uart_icount cnow; - struct uart_port *uport = state->uart_port; - - spin_lock_irq(&uport->lock); - memcpy(&cnow, &uport->icount, sizeof(struct uart_icount)); - spin_unlock_irq(&uport->lock); - - icount->cts = cnow.cts; - icount->dsr = cnow.dsr; - icount->rng = cnow.rng; - icount->dcd = cnow.dcd; - icount->rx = cnow.rx; - icount->tx = cnow.tx; - icount->frame = cnow.frame; - icount->overrun = cnow.overrun; - icount->parity = cnow.parity; - icount->brk = cnow.brk; - icount->buf_overrun = cnow.buf_overrun; - - return 0; -} - -/* - * Called via sys_ioctl. We can use spin_lock_irq() here. - */ -static int -uart_ioctl(struct tty_struct *tty, struct file *filp, unsigned int cmd, - unsigned long arg) -{ - struct uart_state *state = tty->driver_data; - struct tty_port *port = &state->port; - void __user *uarg = (void __user *)arg; - int ret = -ENOIOCTLCMD; - - - /* - * These ioctls don't rely on the hardware to be present. - */ - switch (cmd) { - case TIOCGSERIAL: - ret = uart_get_info(state, uarg); - break; - - case TIOCSSERIAL: - ret = uart_set_info(tty, state, uarg); - break; - - case TIOCSERCONFIG: - ret = uart_do_autoconfig(tty, state); - break; - - case TIOCSERGWILD: /* obsolete */ - case TIOCSERSWILD: /* obsolete */ - ret = 0; - break; - } - - if (ret != -ENOIOCTLCMD) - goto out; - - if (tty->flags & (1 << TTY_IO_ERROR)) { - ret = -EIO; - goto out; - } - - /* - * The following should only be used when hardware is present. - */ - switch (cmd) { - case TIOCMIWAIT: - ret = uart_wait_modem_status(state, arg); - break; - } - - if (ret != -ENOIOCTLCMD) - goto out; - - mutex_lock(&port->mutex); - - if (tty_hung_up_p(filp)) { - ret = -EIO; - goto out_up; - } - - /* - * All these rely on hardware being present and need to be - * protected against the tty being hung up. - */ - switch (cmd) { - case TIOCSERGETLSR: /* Get line status register */ - ret = uart_get_lsr_info(tty, state, uarg); - break; - - default: { - struct uart_port *uport = state->uart_port; - if (uport->ops->ioctl) - ret = uport->ops->ioctl(uport, cmd, arg); - break; - } - } -out_up: - mutex_unlock(&port->mutex); -out: - return ret; -} - -static void uart_set_ldisc(struct tty_struct *tty) -{ - struct uart_state *state = tty->driver_data; - struct uart_port *uport = state->uart_port; - - if (uport->ops->set_ldisc) - uport->ops->set_ldisc(uport, tty->termios->c_line); -} - -static void uart_set_termios(struct tty_struct *tty, - struct ktermios *old_termios) -{ - struct uart_state *state = tty->driver_data; - unsigned long flags; - unsigned int cflag = tty->termios->c_cflag; - - - /* - * These are the bits that are used to setup various - * flags in the low level driver. We can ignore the Bfoo - * bits in c_cflag; c_[io]speed will always be set - * appropriately by set_termios() in tty_ioctl.c - */ -#define RELEVANT_IFLAG(iflag) ((iflag) & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) - if ((cflag ^ old_termios->c_cflag) == 0 && - tty->termios->c_ospeed == old_termios->c_ospeed && - tty->termios->c_ispeed == old_termios->c_ispeed && - RELEVANT_IFLAG(tty->termios->c_iflag ^ old_termios->c_iflag) == 0) { - return; - } - - uart_change_speed(tty, state, old_termios); - - /* Handle transition to B0 status */ - if ((old_termios->c_cflag & CBAUD) && !(cflag & CBAUD)) - uart_clear_mctrl(state->uart_port, TIOCM_RTS | TIOCM_DTR); - /* Handle transition away from B0 status */ - else if (!(old_termios->c_cflag & CBAUD) && (cflag & CBAUD)) { - unsigned int mask = TIOCM_DTR; - if (!(cflag & CRTSCTS) || - !test_bit(TTY_THROTTLED, &tty->flags)) - mask |= TIOCM_RTS; - uart_set_mctrl(state->uart_port, mask); - } - - /* Handle turning off CRTSCTS */ - if ((old_termios->c_cflag & CRTSCTS) && !(cflag & CRTSCTS)) { - spin_lock_irqsave(&state->uart_port->lock, flags); - tty->hw_stopped = 0; - __uart_start(tty); - spin_unlock_irqrestore(&state->uart_port->lock, flags); - } - /* Handle turning on CRTSCTS */ - else if (!(old_termios->c_cflag & CRTSCTS) && (cflag & CRTSCTS)) { - spin_lock_irqsave(&state->uart_port->lock, flags); - if (!(state->uart_port->ops->get_mctrl(state->uart_port) & TIOCM_CTS)) { - tty->hw_stopped = 1; - state->uart_port->ops->stop_tx(state->uart_port); - } - spin_unlock_irqrestore(&state->uart_port->lock, flags); - } -#if 0 - /* - * No need to wake up processes in open wait, since they - * sample the CLOCAL flag once, and don't recheck it. - * XXX It's not clear whether the current behavior is correct - * or not. Hence, this may change..... - */ - if (!(old_termios->c_cflag & CLOCAL) && - (tty->termios->c_cflag & CLOCAL)) - wake_up_interruptible(&state->uart_port.open_wait); -#endif -} - -/* - * In 2.4.5, calls to this will be serialized via the BKL in - * linux/drivers/char/tty_io.c:tty_release() - * linux/drivers/char/tty_io.c:do_tty_handup() - */ -static void uart_close(struct tty_struct *tty, struct file *filp) -{ - struct uart_state *state = tty->driver_data; - struct tty_port *port; - struct uart_port *uport; - unsigned long flags; - - BUG_ON(!tty_locked()); - - if (!state) - return; - - uport = state->uart_port; - port = &state->port; - - pr_debug("uart_close(%d) called\n", uport->line); - - mutex_lock(&port->mutex); - spin_lock_irqsave(&port->lock, flags); - - if (tty_hung_up_p(filp)) { - spin_unlock_irqrestore(&port->lock, flags); - goto done; - } - - if ((tty->count == 1) && (port->count != 1)) { - /* - * Uh, oh. tty->count is 1, which means that the tty - * structure will be freed. port->count should always - * be one in these conditions. If it's greater than - * one, we've got real problems, since it means the - * serial port won't be shutdown. - */ - printk(KERN_ERR "uart_close: bad serial port count; tty->count is 1, " - "port->count is %d\n", port->count); - port->count = 1; - } - if (--port->count < 0) { - printk(KERN_ERR "uart_close: bad serial port count for %s: %d\n", - tty->name, port->count); - port->count = 0; - } - if (port->count) { - spin_unlock_irqrestore(&port->lock, flags); - goto done; - } - - /* - * Now we wait for the transmit buffer to clear; and we notify - * the line discipline to only process XON/XOFF characters by - * setting tty->closing. - */ - tty->closing = 1; - spin_unlock_irqrestore(&port->lock, flags); - - if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) { - /* - * hack: open-coded tty_wait_until_sent to avoid - * recursive tty_lock - */ - long timeout = msecs_to_jiffies(port->closing_wait); - if (wait_event_interruptible_timeout(tty->write_wait, - !tty_chars_in_buffer(tty), timeout) >= 0) - __uart_wait_until_sent(uport, timeout); - } - - /* - * At this point, we stop accepting input. To do this, we - * disable the receive line status interrupts. - */ - if (port->flags & ASYNC_INITIALIZED) { - unsigned long flags; - spin_lock_irqsave(&uport->lock, flags); - uport->ops->stop_rx(uport); - spin_unlock_irqrestore(&uport->lock, flags); - /* - * Before we drop DTR, make sure the UART transmitter - * has completely drained; this is especially - * important if there is a transmit FIFO! - */ - __uart_wait_until_sent(uport, uport->timeout); - } - - uart_shutdown(tty, state); - uart_flush_buffer(tty); - - tty_ldisc_flush(tty); - - tty_port_tty_set(port, NULL); - spin_lock_irqsave(&port->lock, flags); - tty->closing = 0; - - if (port->blocked_open) { - spin_unlock_irqrestore(&port->lock, flags); - if (port->close_delay) - msleep_interruptible(port->close_delay); - spin_lock_irqsave(&port->lock, flags); - } else if (!uart_console(uport)) { - spin_unlock_irqrestore(&port->lock, flags); - uart_change_pm(state, 3); - spin_lock_irqsave(&port->lock, flags); - } - - /* - * Wake up anyone trying to open this port. - */ - clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags); - spin_unlock_irqrestore(&port->lock, flags); - wake_up_interruptible(&port->open_wait); - -done: - mutex_unlock(&port->mutex); -} - -static void __uart_wait_until_sent(struct uart_port *port, int timeout) -{ - unsigned long char_time, expire; - - if (port->type == PORT_UNKNOWN || port->fifosize == 0) - return; - - /* - * Set the check interval to be 1/5 of the estimated time to - * send a single character, and make it at least 1. The check - * interval should also be less than the timeout. - * - * Note: we have to use pretty tight timings here to satisfy - * the NIST-PCTS. - */ - char_time = (port->timeout - HZ/50) / port->fifosize; - char_time = char_time / 5; - if (char_time == 0) - char_time = 1; - if (timeout && timeout < char_time) - char_time = timeout; - - /* - * If the transmitter hasn't cleared in twice the approximate - * amount of time to send the entire FIFO, it probably won't - * ever clear. This assumes the UART isn't doing flow - * control, which is currently the case. Hence, if it ever - * takes longer than port->timeout, this is probably due to a - * UART bug of some kind. So, we clamp the timeout parameter at - * 2*port->timeout. - */ - if (timeout == 0 || timeout > 2 * port->timeout) - timeout = 2 * port->timeout; - - expire = jiffies + timeout; - - pr_debug("uart_wait_until_sent(%d), jiffies=%lu, expire=%lu...\n", - port->line, jiffies, expire); - - /* - * Check whether the transmitter is empty every 'char_time'. - * 'timeout' / 'expire' give us the maximum amount of time - * we wait. - */ - while (!port->ops->tx_empty(port)) { - msleep_interruptible(jiffies_to_msecs(char_time)); - if (signal_pending(current)) - break; - if (time_after(jiffies, expire)) - break; - } - set_current_state(TASK_RUNNING); /* might not be needed */ -} - -static void uart_wait_until_sent(struct tty_struct *tty, int timeout) -{ - struct uart_state *state = tty->driver_data; - struct uart_port *port = state->uart_port; - - tty_lock(); - __uart_wait_until_sent(port, timeout); - tty_unlock(); -} - -/* - * This is called with the BKL held in - * linux/drivers/char/tty_io.c:do_tty_hangup() - * We're called from the eventd thread, so we can sleep for - * a _short_ time only. - */ -static void uart_hangup(struct tty_struct *tty) -{ - struct uart_state *state = tty->driver_data; - struct tty_port *port = &state->port; - unsigned long flags; - - BUG_ON(!tty_locked()); - pr_debug("uart_hangup(%d)\n", state->uart_port->line); - - mutex_lock(&port->mutex); - if (port->flags & ASYNC_NORMAL_ACTIVE) { - uart_flush_buffer(tty); - uart_shutdown(tty, state); - spin_lock_irqsave(&port->lock, flags); - port->count = 0; - clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags); - spin_unlock_irqrestore(&port->lock, flags); - tty_port_tty_set(port, NULL); - wake_up_interruptible(&port->open_wait); - wake_up_interruptible(&port->delta_msr_wait); - } - mutex_unlock(&port->mutex); -} - -/** - * uart_update_termios - update the terminal hw settings - * @tty: tty associated with UART - * @state: UART to update - * - * Copy across the serial console cflag setting into the termios settings - * for the initial open of the port. This allows continuity between the - * kernel settings, and the settings init adopts when it opens the port - * for the first time. - */ -static void uart_update_termios(struct tty_struct *tty, - struct uart_state *state) -{ - struct uart_port *port = state->uart_port; - - if (uart_console(port) && port->cons->cflag) { - tty->termios->c_cflag = port->cons->cflag; - port->cons->cflag = 0; - } - - /* - * If the device failed to grab its irq resources, - * or some other error occurred, don't try to talk - * to the port hardware. - */ - if (!(tty->flags & (1 << TTY_IO_ERROR))) { - /* - * Make termios settings take effect. - */ - uart_change_speed(tty, state, NULL); - - /* - * And finally enable the RTS and DTR signals. - */ - if (tty->termios->c_cflag & CBAUD) - uart_set_mctrl(port, TIOCM_DTR | TIOCM_RTS); - } -} - -static int uart_carrier_raised(struct tty_port *port) -{ - struct uart_state *state = container_of(port, struct uart_state, port); - struct uart_port *uport = state->uart_port; - int mctrl; - spin_lock_irq(&uport->lock); - uport->ops->enable_ms(uport); - mctrl = uport->ops->get_mctrl(uport); - spin_unlock_irq(&uport->lock); - if (mctrl & TIOCM_CAR) - return 1; - return 0; -} - -static void uart_dtr_rts(struct tty_port *port, int onoff) -{ - struct uart_state *state = container_of(port, struct uart_state, port); - struct uart_port *uport = state->uart_port; - - if (onoff) { - uart_set_mctrl(uport, TIOCM_DTR | TIOCM_RTS); - - /* - * If this is the first open to succeed, - * adjust things to suit. - */ - if (!test_and_set_bit(ASYNCB_NORMAL_ACTIVE, &port->flags)) - uart_update_termios(port->tty, state); - } - else - uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS); -} - -static struct uart_state *uart_get(struct uart_driver *drv, int line) -{ - struct uart_state *state; - struct tty_port *port; - int ret = 0; - - state = drv->state + line; - port = &state->port; - if (mutex_lock_interruptible(&port->mutex)) { - ret = -ERESTARTSYS; - goto err; - } - - port->count++; - if (!state->uart_port || state->uart_port->flags & UPF_DEAD) { - ret = -ENXIO; - goto err_unlock; - } - return state; - - err_unlock: - port->count--; - mutex_unlock(&port->mutex); - err: - return ERR_PTR(ret); -} - -/* - * calls to uart_open are serialised by the BKL in - * fs/char_dev.c:chrdev_open() - * Note that if this fails, then uart_close() _will_ be called. - * - * In time, we want to scrap the "opening nonpresent ports" - * behaviour and implement an alternative way for setserial - * to set base addresses/ports/types. This will allow us to - * get rid of a certain amount of extra tests. - */ -static int uart_open(struct tty_struct *tty, struct file *filp) -{ - struct uart_driver *drv = (struct uart_driver *)tty->driver->driver_state; - struct uart_state *state; - struct tty_port *port; - int retval, line = tty->index; - - BUG_ON(!tty_locked()); - pr_debug("uart_open(%d) called\n", line); - - /* - * tty->driver->num won't change, so we won't fail here with - * tty->driver_data set to something non-NULL (and therefore - * we won't get caught by uart_close()). - */ - retval = -ENODEV; - if (line >= tty->driver->num) - goto fail; - - /* - * We take the semaphore inside uart_get to guarantee that we won't - * be re-entered while allocating the state structure, or while we - * request any IRQs that the driver may need. This also has the nice - * side-effect that it delays the action of uart_hangup, so we can - * guarantee that state->port.tty will always contain something - * reasonable. - */ - state = uart_get(drv, line); - if (IS_ERR(state)) { - retval = PTR_ERR(state); - goto fail; - } - port = &state->port; - - /* - * Once we set tty->driver_data here, we are guaranteed that - * uart_close() will decrement the driver module use count. - * Any failures from here onwards should not touch the count. - */ - tty->driver_data = state; - state->uart_port->state = state; - tty->low_latency = (state->uart_port->flags & UPF_LOW_LATENCY) ? 1 : 0; - tty->alt_speed = 0; - tty_port_tty_set(port, tty); - - /* - * If the port is in the middle of closing, bail out now. - */ - if (tty_hung_up_p(filp)) { - retval = -EAGAIN; - port->count--; - mutex_unlock(&port->mutex); - goto fail; - } - - /* - * Make sure the device is in D0 state. - */ - if (port->count == 1) - uart_change_pm(state, 0); - - /* - * Start up the serial port. - */ - retval = uart_startup(tty, state, 0); - - /* - * If we succeeded, wait until the port is ready. - */ - mutex_unlock(&port->mutex); - if (retval == 0) - retval = tty_port_block_til_ready(port, tty, filp); - -fail: - return retval; -} - -static const char *uart_type(struct uart_port *port) -{ - const char *str = NULL; - - if (port->ops->type) - str = port->ops->type(port); - - if (!str) - str = "unknown"; - - return str; -} - -#ifdef CONFIG_PROC_FS - -static void uart_line_info(struct seq_file *m, struct uart_driver *drv, int i) -{ - struct uart_state *state = drv->state + i; - struct tty_port *port = &state->port; - int pm_state; - struct uart_port *uport = state->uart_port; - char stat_buf[32]; - unsigned int status; - int mmio; - - if (!uport) - return; - - mmio = uport->iotype >= UPIO_MEM; - seq_printf(m, "%d: uart:%s %s%08llX irq:%d", - uport->line, uart_type(uport), - mmio ? "mmio:0x" : "port:", - mmio ? (unsigned long long)uport->mapbase - : (unsigned long long)uport->iobase, - uport->irq); - - if (uport->type == PORT_UNKNOWN) { - seq_putc(m, '\n'); - return; - } - - if (capable(CAP_SYS_ADMIN)) { - mutex_lock(&port->mutex); - pm_state = state->pm_state; - if (pm_state) - uart_change_pm(state, 0); - spin_lock_irq(&uport->lock); - status = uport->ops->get_mctrl(uport); - spin_unlock_irq(&uport->lock); - if (pm_state) - uart_change_pm(state, pm_state); - mutex_unlock(&port->mutex); - - seq_printf(m, " tx:%d rx:%d", - uport->icount.tx, uport->icount.rx); - if (uport->icount.frame) - seq_printf(m, " fe:%d", - uport->icount.frame); - if (uport->icount.parity) - seq_printf(m, " pe:%d", - uport->icount.parity); - if (uport->icount.brk) - seq_printf(m, " brk:%d", - uport->icount.brk); - if (uport->icount.overrun) - seq_printf(m, " oe:%d", - uport->icount.overrun); - -#define INFOBIT(bit, str) \ - if (uport->mctrl & (bit)) \ - strncat(stat_buf, (str), sizeof(stat_buf) - \ - strlen(stat_buf) - 2) -#define STATBIT(bit, str) \ - if (status & (bit)) \ - strncat(stat_buf, (str), sizeof(stat_buf) - \ - strlen(stat_buf) - 2) - - stat_buf[0] = '\0'; - stat_buf[1] = '\0'; - INFOBIT(TIOCM_RTS, "|RTS"); - STATBIT(TIOCM_CTS, "|CTS"); - INFOBIT(TIOCM_DTR, "|DTR"); - STATBIT(TIOCM_DSR, "|DSR"); - STATBIT(TIOCM_CAR, "|CD"); - STATBIT(TIOCM_RNG, "|RI"); - if (stat_buf[0]) - stat_buf[0] = ' '; - - seq_puts(m, stat_buf); - } - seq_putc(m, '\n'); -#undef STATBIT -#undef INFOBIT -} - -static int uart_proc_show(struct seq_file *m, void *v) -{ - struct tty_driver *ttydrv = m->private; - struct uart_driver *drv = ttydrv->driver_state; - int i; - - seq_printf(m, "serinfo:1.0 driver%s%s revision:%s\n", - "", "", ""); - for (i = 0; i < drv->nr; i++) - uart_line_info(m, drv, i); - return 0; -} - -static int uart_proc_open(struct inode *inode, struct file *file) -{ - return single_open(file, uart_proc_show, PDE(inode)->data); -} - -static const struct file_operations uart_proc_fops = { - .owner = THIS_MODULE, - .open = uart_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; -#endif - -#if defined(CONFIG_SERIAL_CORE_CONSOLE) || defined(CONFIG_CONSOLE_POLL) -/* - * uart_console_write - write a console message to a serial port - * @port: the port to write the message - * @s: array of characters - * @count: number of characters in string to write - * @write: function to write character to port - */ -void uart_console_write(struct uart_port *port, const char *s, - unsigned int count, - void (*putchar)(struct uart_port *, int)) -{ - unsigned int i; - - for (i = 0; i < count; i++, s++) { - if (*s == '\n') - putchar(port, '\r'); - putchar(port, *s); - } -} -EXPORT_SYMBOL_GPL(uart_console_write); - -/* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ -struct uart_port * __init -uart_get_console(struct uart_port *ports, int nr, struct console *co) -{ - int idx = co->index; - - if (idx < 0 || idx >= nr || (ports[idx].iobase == 0 && - ports[idx].membase == NULL)) - for (idx = 0; idx < nr; idx++) - if (ports[idx].iobase != 0 || - ports[idx].membase != NULL) - break; - - co->index = idx; - - return ports + idx; -} - -/** - * uart_parse_options - Parse serial port baud/parity/bits/flow contro. - * @options: pointer to option string - * @baud: pointer to an 'int' variable for the baud rate. - * @parity: pointer to an 'int' variable for the parity. - * @bits: pointer to an 'int' variable for the number of data bits. - * @flow: pointer to an 'int' variable for the flow control character. - * - * uart_parse_options decodes a string containing the serial console - * options. The format of the string is <baud><parity><bits><flow>, - * eg: 115200n8r - */ -void -uart_parse_options(char *options, int *baud, int *parity, int *bits, int *flow) -{ - char *s = options; - - *baud = simple_strtoul(s, NULL, 10); - while (*s >= '0' && *s <= '9') - s++; - if (*s) - *parity = *s++; - if (*s) - *bits = *s++ - '0'; - if (*s) - *flow = *s; -} -EXPORT_SYMBOL_GPL(uart_parse_options); - -struct baud_rates { - unsigned int rate; - unsigned int cflag; -}; - -static const struct baud_rates baud_rates[] = { - { 921600, B921600 }, - { 460800, B460800 }, - { 230400, B230400 }, - { 115200, B115200 }, - { 57600, B57600 }, - { 38400, B38400 }, - { 19200, B19200 }, - { 9600, B9600 }, - { 4800, B4800 }, - { 2400, B2400 }, - { 1200, B1200 }, - { 0, B38400 } -}; - -/** - * uart_set_options - setup the serial console parameters - * @port: pointer to the serial ports uart_port structure - * @co: console pointer - * @baud: baud rate - * @parity: parity character - 'n' (none), 'o' (odd), 'e' (even) - * @bits: number of data bits - * @flow: flow control character - 'r' (rts) - */ -int -uart_set_options(struct uart_port *port, struct console *co, - int baud, int parity, int bits, int flow) -{ - struct ktermios termios; - static struct ktermios dummy; - int i; - - /* - * Ensure that the serial console lock is initialised - * early. - */ - spin_lock_init(&port->lock); - lockdep_set_class(&port->lock, &port_lock_key); - - memset(&termios, 0, sizeof(struct ktermios)); - - termios.c_cflag = CREAD | HUPCL | CLOCAL; - - /* - * Construct a cflag setting. - */ - for (i = 0; baud_rates[i].rate; i++) - if (baud_rates[i].rate <= baud) - break; - - termios.c_cflag |= baud_rates[i].cflag; - - if (bits == 7) - termios.c_cflag |= CS7; - else - termios.c_cflag |= CS8; - - switch (parity) { - case 'o': case 'O': - termios.c_cflag |= PARODD; - /*fall through*/ - case 'e': case 'E': - termios.c_cflag |= PARENB; - break; - } - - if (flow == 'r') - termios.c_cflag |= CRTSCTS; - - /* - * some uarts on other side don't support no flow control. - * So we set * DTR in host uart to make them happy - */ - port->mctrl |= TIOCM_DTR; - - port->ops->set_termios(port, &termios, &dummy); - /* - * Allow the setting of the UART parameters with a NULL console - * too: - */ - if (co) - co->cflag = termios.c_cflag; - - return 0; -} -EXPORT_SYMBOL_GPL(uart_set_options); -#endif /* CONFIG_SERIAL_CORE_CONSOLE */ - -static void uart_change_pm(struct uart_state *state, int pm_state) -{ - struct uart_port *port = state->uart_port; - - if (state->pm_state != pm_state) { - if (port->ops->pm) - port->ops->pm(port, pm_state, state->pm_state); - state->pm_state = pm_state; - } -} - -struct uart_match { - struct uart_port *port; - struct uart_driver *driver; -}; - -static int serial_match_port(struct device *dev, void *data) -{ - struct uart_match *match = data; - struct tty_driver *tty_drv = match->driver->tty_driver; - dev_t devt = MKDEV(tty_drv->major, tty_drv->minor_start) + - match->port->line; - - return dev->devt == devt; /* Actually, only one tty per port */ -} - -int uart_suspend_port(struct uart_driver *drv, struct uart_port *uport) -{ - struct uart_state *state = drv->state + uport->line; - struct tty_port *port = &state->port; - struct device *tty_dev; - struct uart_match match = {uport, drv}; - struct tty_struct *tty; - - mutex_lock(&port->mutex); - - /* Must be inside the mutex lock until we convert to tty_port */ - tty = port->tty; - - tty_dev = device_find_child(uport->dev, &match, serial_match_port); - if (device_may_wakeup(tty_dev)) { - if (!enable_irq_wake(uport->irq)) - uport->irq_wake = 1; - put_device(tty_dev); - mutex_unlock(&port->mutex); - return 0; - } - if (console_suspend_enabled || !uart_console(uport)) - uport->suspended = 1; - - if (port->flags & ASYNC_INITIALIZED) { - const struct uart_ops *ops = uport->ops; - int tries; - - if (console_suspend_enabled || !uart_console(uport)) { - set_bit(ASYNCB_SUSPENDED, &port->flags); - clear_bit(ASYNCB_INITIALIZED, &port->flags); - - spin_lock_irq(&uport->lock); - ops->stop_tx(uport); - ops->set_mctrl(uport, 0); - ops->stop_rx(uport); - spin_unlock_irq(&uport->lock); - } - - /* - * Wait for the transmitter to empty. - */ - for (tries = 3; !ops->tx_empty(uport) && tries; tries--) - msleep(10); - if (!tries) - printk(KERN_ERR "%s%s%s%d: Unable to drain " - "transmitter\n", - uport->dev ? dev_name(uport->dev) : "", - uport->dev ? ": " : "", - drv->dev_name, - drv->tty_driver->name_base + uport->line); - - if (console_suspend_enabled || !uart_console(uport)) - ops->shutdown(uport); - } - - /* - * Disable the console device before suspending. - */ - if (console_suspend_enabled && uart_console(uport)) - console_stop(uport->cons); - - if (console_suspend_enabled || !uart_console(uport)) - uart_change_pm(state, 3); - - mutex_unlock(&port->mutex); - - return 0; -} - -int uart_resume_port(struct uart_driver *drv, struct uart_port *uport) -{ - struct uart_state *state = drv->state + uport->line; - struct tty_port *port = &state->port; - struct device *tty_dev; - struct uart_match match = {uport, drv}; - struct ktermios termios; - - mutex_lock(&port->mutex); - - tty_dev = device_find_child(uport->dev, &match, serial_match_port); - if (!uport->suspended && device_may_wakeup(tty_dev)) { - if (uport->irq_wake) { - disable_irq_wake(uport->irq); - uport->irq_wake = 0; - } - mutex_unlock(&port->mutex); - return 0; - } - uport->suspended = 0; - - /* - * Re-enable the console device after suspending. - */ - if (console_suspend_enabled && uart_console(uport)) { - /* - * First try to use the console cflag setting. - */ - memset(&termios, 0, sizeof(struct ktermios)); - termios.c_cflag = uport->cons->cflag; - - /* - * If that's unset, use the tty termios setting. - */ - if (port->tty && port->tty->termios && termios.c_cflag == 0) - termios = *(port->tty->termios); - - uart_change_pm(state, 0); - uport->ops->set_termios(uport, &termios, NULL); - console_start(uport->cons); - } - - if (port->flags & ASYNC_SUSPENDED) { - const struct uart_ops *ops = uport->ops; - int ret; - - uart_change_pm(state, 0); - spin_lock_irq(&uport->lock); - ops->set_mctrl(uport, 0); - spin_unlock_irq(&uport->lock); - if (console_suspend_enabled || !uart_console(uport)) { - /* Protected by port mutex for now */ - struct tty_struct *tty = port->tty; - ret = ops->startup(uport); - if (ret == 0) { - if (tty) - uart_change_speed(tty, state, NULL); - spin_lock_irq(&uport->lock); - ops->set_mctrl(uport, uport->mctrl); - ops->start_tx(uport); - spin_unlock_irq(&uport->lock); - set_bit(ASYNCB_INITIALIZED, &port->flags); - } else { - /* - * Failed to resume - maybe hardware went away? - * Clear the "initialized" flag so we won't try - * to call the low level drivers shutdown method. - */ - uart_shutdown(tty, state); - } - } - - clear_bit(ASYNCB_SUSPENDED, &port->flags); - } - - mutex_unlock(&port->mutex); - - return 0; -} - -static inline void -uart_report_port(struct uart_driver *drv, struct uart_port *port) -{ - char address[64]; - - switch (port->iotype) { - case UPIO_PORT: - snprintf(address, sizeof(address), "I/O 0x%lx", port->iobase); - break; - case UPIO_HUB6: - snprintf(address, sizeof(address), - "I/O 0x%lx offset 0x%x", port->iobase, port->hub6); - break; - case UPIO_MEM: - case UPIO_MEM32: - case UPIO_AU: - case UPIO_TSI: - case UPIO_DWAPB: - case UPIO_DWAPB32: - snprintf(address, sizeof(address), - "MMIO 0x%llx", (unsigned long long)port->mapbase); - break; - default: - strlcpy(address, "*unknown*", sizeof(address)); - break; - } - - printk(KERN_INFO "%s%s%s%d at %s (irq = %d) is a %s\n", - port->dev ? dev_name(port->dev) : "", - port->dev ? ": " : "", - drv->dev_name, - drv->tty_driver->name_base + port->line, - address, port->irq, uart_type(port)); -} - -static void -uart_configure_port(struct uart_driver *drv, struct uart_state *state, - struct uart_port *port) -{ - unsigned int flags; - - /* - * If there isn't a port here, don't do anything further. - */ - if (!port->iobase && !port->mapbase && !port->membase) - return; - - /* - * Now do the auto configuration stuff. Note that config_port - * is expected to claim the resources and map the port for us. - */ - flags = 0; - if (port->flags & UPF_AUTO_IRQ) - flags |= UART_CONFIG_IRQ; - if (port->flags & UPF_BOOT_AUTOCONF) { - if (!(port->flags & UPF_FIXED_TYPE)) { - port->type = PORT_UNKNOWN; - flags |= UART_CONFIG_TYPE; - } - port->ops->config_port(port, flags); - } - - if (port->type != PORT_UNKNOWN) { - unsigned long flags; - - uart_report_port(drv, port); - - /* Power up port for set_mctrl() */ - uart_change_pm(state, 0); - - /* - * Ensure that the modem control lines are de-activated. - * keep the DTR setting that is set in uart_set_options() - * We probably don't need a spinlock around this, but - */ - spin_lock_irqsave(&port->lock, flags); - port->ops->set_mctrl(port, port->mctrl & TIOCM_DTR); - spin_unlock_irqrestore(&port->lock, flags); - - /* - * If this driver supports console, and it hasn't been - * successfully registered yet, try to re-register it. - * It may be that the port was not available. - */ - if (port->cons && !(port->cons->flags & CON_ENABLED)) - register_console(port->cons); - - /* - * Power down all ports by default, except the - * console if we have one. - */ - if (!uart_console(port)) - uart_change_pm(state, 3); - } -} - -#ifdef CONFIG_CONSOLE_POLL - -static int uart_poll_init(struct tty_driver *driver, int line, char *options) -{ - struct uart_driver *drv = driver->driver_state; - struct uart_state *state = drv->state + line; - struct uart_port *port; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - if (!state || !state->uart_port) - return -1; - - port = state->uart_port; - if (!(port->ops->poll_get_char && port->ops->poll_put_char)) - return -1; - - if (options) { - uart_parse_options(options, &baud, &parity, &bits, &flow); - return uart_set_options(port, NULL, baud, parity, bits, flow); - } - - return 0; -} - -static int uart_poll_get_char(struct tty_driver *driver, int line) -{ - struct uart_driver *drv = driver->driver_state; - struct uart_state *state = drv->state + line; - struct uart_port *port; - - if (!state || !state->uart_port) - return -1; - - port = state->uart_port; - return port->ops->poll_get_char(port); -} - -static void uart_poll_put_char(struct tty_driver *driver, int line, char ch) -{ - struct uart_driver *drv = driver->driver_state; - struct uart_state *state = drv->state + line; - struct uart_port *port; - - if (!state || !state->uart_port) - return; - - port = state->uart_port; - port->ops->poll_put_char(port, ch); -} -#endif - -static const struct tty_operations uart_ops = { - .open = uart_open, - .close = uart_close, - .write = uart_write, - .put_char = uart_put_char, - .flush_chars = uart_flush_chars, - .write_room = uart_write_room, - .chars_in_buffer= uart_chars_in_buffer, - .flush_buffer = uart_flush_buffer, - .ioctl = uart_ioctl, - .throttle = uart_throttle, - .unthrottle = uart_unthrottle, - .send_xchar = uart_send_xchar, - .set_termios = uart_set_termios, - .set_ldisc = uart_set_ldisc, - .stop = uart_stop, - .start = uart_start, - .hangup = uart_hangup, - .break_ctl = uart_break_ctl, - .wait_until_sent= uart_wait_until_sent, -#ifdef CONFIG_PROC_FS - .proc_fops = &uart_proc_fops, -#endif - .tiocmget = uart_tiocmget, - .tiocmset = uart_tiocmset, - .get_icount = uart_get_icount, -#ifdef CONFIG_CONSOLE_POLL - .poll_init = uart_poll_init, - .poll_get_char = uart_poll_get_char, - .poll_put_char = uart_poll_put_char, -#endif -}; - -static const struct tty_port_operations uart_port_ops = { - .carrier_raised = uart_carrier_raised, - .dtr_rts = uart_dtr_rts, -}; - -/** - * uart_register_driver - register a driver with the uart core layer - * @drv: low level driver structure - * - * Register a uart driver with the core driver. We in turn register - * with the tty layer, and initialise the core driver per-port state. - * - * We have a proc file in /proc/tty/driver which is named after the - * normal driver. - * - * drv->port should be NULL, and the per-port structures should be - * registered using uart_add_one_port after this call has succeeded. - */ -int uart_register_driver(struct uart_driver *drv) -{ - struct tty_driver *normal; - int i, retval; - - BUG_ON(drv->state); - - /* - * Maybe we should be using a slab cache for this, especially if - * we have a large number of ports to handle. - */ - drv->state = kzalloc(sizeof(struct uart_state) * drv->nr, GFP_KERNEL); - if (!drv->state) - goto out; - - normal = alloc_tty_driver(drv->nr); - if (!normal) - goto out_kfree; - - drv->tty_driver = normal; - - normal->owner = drv->owner; - normal->driver_name = drv->driver_name; - normal->name = drv->dev_name; - normal->major = drv->major; - normal->minor_start = drv->minor; - normal->type = TTY_DRIVER_TYPE_SERIAL; - normal->subtype = SERIAL_TYPE_NORMAL; - normal->init_termios = tty_std_termios; - normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; - normal->init_termios.c_ispeed = normal->init_termios.c_ospeed = 9600; - normal->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; - normal->driver_state = drv; - tty_set_operations(normal, &uart_ops); - - /* - * Initialise the UART state(s). - */ - for (i = 0; i < drv->nr; i++) { - struct uart_state *state = drv->state + i; - struct tty_port *port = &state->port; - - tty_port_init(port); - port->ops = &uart_port_ops; - port->close_delay = 500; /* .5 seconds */ - port->closing_wait = 30000; /* 30 seconds */ - tasklet_init(&state->tlet, uart_tasklet_action, - (unsigned long)state); - } - - retval = tty_register_driver(normal); - if (retval >= 0) - return retval; - - put_tty_driver(normal); -out_kfree: - kfree(drv->state); -out: - return -ENOMEM; -} - -/** - * uart_unregister_driver - remove a driver from the uart core layer - * @drv: low level driver structure - * - * Remove all references to a driver from the core driver. The low - * level driver must have removed all its ports via the - * uart_remove_one_port() if it registered them with uart_add_one_port(). - * (ie, drv->port == NULL) - */ -void uart_unregister_driver(struct uart_driver *drv) -{ - struct tty_driver *p = drv->tty_driver; - tty_unregister_driver(p); - put_tty_driver(p); - kfree(drv->state); - drv->tty_driver = NULL; -} - -struct tty_driver *uart_console_device(struct console *co, int *index) -{ - struct uart_driver *p = co->data; - *index = co->index; - return p->tty_driver; -} - -/** - * uart_add_one_port - attach a driver-defined port structure - * @drv: pointer to the uart low level driver structure for this port - * @uport: uart port structure to use for this port. - * - * This allows the driver to register its own uart_port structure - * with the core driver. The main purpose is to allow the low - * level uart drivers to expand uart_port, rather than having yet - * more levels of structures. - */ -int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport) -{ - struct uart_state *state; - struct tty_port *port; - int ret = 0; - struct device *tty_dev; - - BUG_ON(in_interrupt()); - - if (uport->line >= drv->nr) - return -EINVAL; - - state = drv->state + uport->line; - port = &state->port; - - mutex_lock(&port_mutex); - mutex_lock(&port->mutex); - if (state->uart_port) { - ret = -EINVAL; - goto out; - } - - state->uart_port = uport; - state->pm_state = -1; - - uport->cons = drv->cons; - uport->state = state; - - /* - * If this port is a console, then the spinlock is already - * initialised. - */ - if (!(uart_console(uport) && (uport->cons->flags & CON_ENABLED))) { - spin_lock_init(&uport->lock); - lockdep_set_class(&uport->lock, &port_lock_key); - } - - uart_configure_port(drv, state, uport); - - /* - * Register the port whether it's detected or not. This allows - * setserial to be used to alter this ports parameters. - */ - tty_dev = tty_register_device(drv->tty_driver, uport->line, uport->dev); - if (likely(!IS_ERR(tty_dev))) { - device_init_wakeup(tty_dev, 1); - device_set_wakeup_enable(tty_dev, 0); - } else - printk(KERN_ERR "Cannot register tty device on line %d\n", - uport->line); - - /* - * Ensure UPF_DEAD is not set. - */ - uport->flags &= ~UPF_DEAD; - - out: - mutex_unlock(&port->mutex); - mutex_unlock(&port_mutex); - - return ret; -} - -/** - * uart_remove_one_port - detach a driver defined port structure - * @drv: pointer to the uart low level driver structure for this port - * @uport: uart port structure for this port - * - * This unhooks (and hangs up) the specified port structure from the - * core driver. No further calls will be made to the low-level code - * for this port. - */ -int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport) -{ - struct uart_state *state = drv->state + uport->line; - struct tty_port *port = &state->port; - - BUG_ON(in_interrupt()); - - if (state->uart_port != uport) - printk(KERN_ALERT "Removing wrong port: %p != %p\n", - state->uart_port, uport); - - mutex_lock(&port_mutex); - - /* - * Mark the port "dead" - this prevents any opens from - * succeeding while we shut down the port. - */ - mutex_lock(&port->mutex); - uport->flags |= UPF_DEAD; - mutex_unlock(&port->mutex); - - /* - * Remove the devices from the tty layer - */ - tty_unregister_device(drv->tty_driver, uport->line); - - if (port->tty) - tty_vhangup(port->tty); - - /* - * Free the port IO and memory resources, if any. - */ - if (uport->type != PORT_UNKNOWN) - uport->ops->release_port(uport); - - /* - * Indicate that there isn't a port here anymore. - */ - uport->type = PORT_UNKNOWN; - - /* - * Kill the tasklet, and free resources. - */ - tasklet_kill(&state->tlet); - - state->uart_port = NULL; - mutex_unlock(&port_mutex); - - return 0; -} - -/* - * Are the two ports equivalent? - */ -int uart_match_port(struct uart_port *port1, struct uart_port *port2) -{ - if (port1->iotype != port2->iotype) - return 0; - - switch (port1->iotype) { - case UPIO_PORT: - return (port1->iobase == port2->iobase); - case UPIO_HUB6: - return (port1->iobase == port2->iobase) && - (port1->hub6 == port2->hub6); - case UPIO_MEM: - case UPIO_MEM32: - case UPIO_AU: - case UPIO_TSI: - case UPIO_DWAPB: - case UPIO_DWAPB32: - return (port1->mapbase == port2->mapbase); - } - return 0; -} -EXPORT_SYMBOL(uart_match_port); - -EXPORT_SYMBOL(uart_write_wakeup); -EXPORT_SYMBOL(uart_register_driver); -EXPORT_SYMBOL(uart_unregister_driver); -EXPORT_SYMBOL(uart_suspend_port); -EXPORT_SYMBOL(uart_resume_port); -EXPORT_SYMBOL(uart_add_one_port); -EXPORT_SYMBOL(uart_remove_one_port); - -MODULE_DESCRIPTION("Serial driver core"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/serial_cs.c b/drivers/serial/serial_cs.c deleted file mode 100644 index 93760b2ea172..000000000000 --- a/drivers/serial/serial_cs.c +++ /dev/null @@ -1,869 +0,0 @@ -/*====================================================================== - - A driver for PCMCIA serial devices - - serial_cs.c 1.134 2002/05/04 05:48:53 - - The contents of this file are subject to the Mozilla Public - License Version 1.1 (the "License"); you may not use this file - except in compliance with the License. You may obtain a copy of - the License at http://www.mozilla.org/MPL/ - - Software distributed under the License is distributed on an "AS - IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or - implied. See the License for the specific language governing - rights and limitations under the License. - - The initial developer of the original code is David A. Hinds - <dahinds@users.sourceforge.net>. Portions created by David A. Hinds - are Copyright (C) 1999 David A. Hinds. All Rights Reserved. - - Alternatively, the contents of this file may be used under the - terms of the GNU General Public License version 2 (the "GPL"), in which - case the provisions of the GPL are applicable instead of the - above. If you wish to allow the use of your version of this file - only under the terms of the GPL and not to allow others to use - your version of this file under the MPL, indicate your decision - by deleting the provisions above and replace them with the notice - and other provisions required by the GPL. If you do not delete - the provisions above, a recipient may use your version of this - file under either the MPL or the GPL. - -======================================================================*/ - -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/ptrace.h> -#include <linux/slab.h> -#include <linux/string.h> -#include <linux/timer.h> -#include <linux/serial_core.h> -#include <linux/delay.h> -#include <linux/major.h> -#include <asm/io.h> -#include <asm/system.h> - -#include <pcmcia/cistpl.h> -#include <pcmcia/ciscode.h> -#include <pcmcia/ds.h> -#include <pcmcia/cisreg.h> - -#include "8250.h" - - -/*====================================================================*/ - -/* Parameters that can be set with 'insmod' */ - -/* Enable the speaker? */ -static int do_sound = 1; -/* Skip strict UART tests? */ -static int buggy_uart; - -module_param(do_sound, int, 0444); -module_param(buggy_uart, int, 0444); - -/*====================================================================*/ - -/* Table of multi-port card ID's */ - -struct serial_quirk { - unsigned int manfid; - unsigned int prodid; - int multi; /* 1 = multifunction, > 1 = # ports */ - void (*config)(struct pcmcia_device *); - void (*setup)(struct pcmcia_device *, struct uart_port *); - void (*wakeup)(struct pcmcia_device *); - int (*post)(struct pcmcia_device *); -}; - -struct serial_info { - struct pcmcia_device *p_dev; - int ndev; - int multi; - int slave; - int manfid; - int prodid; - int c950ctrl; - int line[4]; - const struct serial_quirk *quirk; -}; - -struct serial_cfg_mem { - tuple_t tuple; - cisparse_t parse; - u_char buf[256]; -}; - -/* - * vers_1 5.0, "Brain Boxes", "2-Port RS232 card", "r6" - * manfid 0x0160, 0x0104 - * This card appears to have a 14.7456MHz clock. - */ -/* Generic Modem: MD55x (GPRS/EDGE) have - * Elan VPU16551 UART with 14.7456MHz oscillator - * manfid 0x015D, 0x4C45 - */ -static void quirk_setup_brainboxes_0104(struct pcmcia_device *link, struct uart_port *port) -{ - port->uartclk = 14745600; -} - -static int quirk_post_ibm(struct pcmcia_device *link) -{ - u8 val; - int ret; - - ret = pcmcia_read_config_byte(link, 0x800, &val); - if (ret) - goto failed; - - ret = pcmcia_write_config_byte(link, 0x800, val | 1); - if (ret) - goto failed; - return 0; - - failed: - return -ENODEV; -} - -/* - * Nokia cards are not really multiport cards. Shouldn't this - * be handled by setting the quirk entry .multi = 0 | 1 ? - */ -static void quirk_config_nokia(struct pcmcia_device *link) -{ - struct serial_info *info = link->priv; - - if (info->multi > 1) - info->multi = 1; -} - -static void quirk_wakeup_oxsemi(struct pcmcia_device *link) -{ - struct serial_info *info = link->priv; - - if (info->c950ctrl) - outb(12, info->c950ctrl + 1); -} - -/* request_region? oxsemi branch does no request_region too... */ -/* - * This sequence is needed to properly initialize MC45 attached to OXCF950. - * I tried decreasing these msleep()s, but it worked properly (survived - * 1000 stop/start operations) with these timeouts (or bigger). - */ -static void quirk_wakeup_possio_gcc(struct pcmcia_device *link) -{ - struct serial_info *info = link->priv; - unsigned int ctrl = info->c950ctrl; - - outb(0xA, ctrl + 1); - msleep(100); - outb(0xE, ctrl + 1); - msleep(300); - outb(0xC, ctrl + 1); - msleep(100); - outb(0xE, ctrl + 1); - msleep(200); - outb(0xF, ctrl + 1); - msleep(100); - outb(0xE, ctrl + 1); - msleep(100); - outb(0xC, ctrl + 1); -} - -/* - * Socket Dual IO: this enables irq's for second port - */ -static void quirk_config_socket(struct pcmcia_device *link) -{ - struct serial_info *info = link->priv; - - if (info->multi) - link->config_flags |= CONF_ENABLE_ESR; -} - -static const struct serial_quirk quirks[] = { - { - .manfid = 0x0160, - .prodid = 0x0104, - .multi = -1, - .setup = quirk_setup_brainboxes_0104, - }, { - .manfid = 0x015D, - .prodid = 0x4C45, - .multi = -1, - .setup = quirk_setup_brainboxes_0104, - }, { - .manfid = MANFID_IBM, - .prodid = ~0, - .multi = -1, - .post = quirk_post_ibm, - }, { - .manfid = MANFID_INTEL, - .prodid = PRODID_INTEL_DUAL_RS232, - .multi = 2, - }, { - .manfid = MANFID_NATINST, - .prodid = PRODID_NATINST_QUAD_RS232, - .multi = 4, - }, { - .manfid = MANFID_NOKIA, - .prodid = ~0, - .multi = -1, - .config = quirk_config_nokia, - }, { - .manfid = MANFID_OMEGA, - .prodid = PRODID_OMEGA_QSP_100, - .multi = 4, - }, { - .manfid = MANFID_OXSEMI, - .prodid = ~0, - .multi = -1, - .wakeup = quirk_wakeup_oxsemi, - }, { - .manfid = MANFID_POSSIO, - .prodid = PRODID_POSSIO_GCC, - .multi = -1, - .wakeup = quirk_wakeup_possio_gcc, - }, { - .manfid = MANFID_QUATECH, - .prodid = PRODID_QUATECH_DUAL_RS232, - .multi = 2, - }, { - .manfid = MANFID_QUATECH, - .prodid = PRODID_QUATECH_DUAL_RS232_D1, - .multi = 2, - }, { - .manfid = MANFID_QUATECH, - .prodid = PRODID_QUATECH_DUAL_RS232_G, - .multi = 2, - }, { - .manfid = MANFID_QUATECH, - .prodid = PRODID_QUATECH_QUAD_RS232, - .multi = 4, - }, { - .manfid = MANFID_SOCKET, - .prodid = PRODID_SOCKET_DUAL_RS232, - .multi = 2, - .config = quirk_config_socket, - }, { - .manfid = MANFID_SOCKET, - .prodid = ~0, - .multi = -1, - .config = quirk_config_socket, - } -}; - - -static int serial_config(struct pcmcia_device * link); - - -static void serial_remove(struct pcmcia_device *link) -{ - struct serial_info *info = link->priv; - int i; - - dev_dbg(&link->dev, "serial_release\n"); - - /* - * Recheck to see if the device is still configured. - */ - for (i = 0; i < info->ndev; i++) - serial8250_unregister_port(info->line[i]); - - if (!info->slave) - pcmcia_disable_device(link); -} - -static int serial_suspend(struct pcmcia_device *link) -{ - struct serial_info *info = link->priv; - int i; - - for (i = 0; i < info->ndev; i++) - serial8250_suspend_port(info->line[i]); - - return 0; -} - -static int serial_resume(struct pcmcia_device *link) -{ - struct serial_info *info = link->priv; - int i; - - for (i = 0; i < info->ndev; i++) - serial8250_resume_port(info->line[i]); - - if (info->quirk && info->quirk->wakeup) - info->quirk->wakeup(link); - - return 0; -} - -static int serial_probe(struct pcmcia_device *link) -{ - struct serial_info *info; - - dev_dbg(&link->dev, "serial_attach()\n"); - - /* Create new serial device */ - info = kzalloc(sizeof (*info), GFP_KERNEL); - if (!info) - return -ENOMEM; - info->p_dev = link; - link->priv = info; - - link->config_flags |= CONF_ENABLE_IRQ; - if (do_sound) - link->config_flags |= CONF_ENABLE_SPKR; - - return serial_config(link); -} - -static void serial_detach(struct pcmcia_device *link) -{ - struct serial_info *info = link->priv; - - dev_dbg(&link->dev, "serial_detach\n"); - - /* - * Ensure that the ports have been released. - */ - serial_remove(link); - - /* free bits */ - kfree(info); -} - -/*====================================================================*/ - -static int setup_serial(struct pcmcia_device *handle, struct serial_info * info, - unsigned int iobase, int irq) -{ - struct uart_port port; - int line; - - memset(&port, 0, sizeof (struct uart_port)); - port.iobase = iobase; - port.irq = irq; - port.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_SHARE_IRQ; - port.uartclk = 1843200; - port.dev = &handle->dev; - if (buggy_uart) - port.flags |= UPF_BUGGY_UART; - - if (info->quirk && info->quirk->setup) - info->quirk->setup(handle, &port); - - line = serial8250_register_port(&port); - if (line < 0) { - printk(KERN_NOTICE "serial_cs: serial8250_register_port() at " - "0x%04lx, irq %d failed\n", (u_long)iobase, irq); - return -EINVAL; - } - - info->line[info->ndev] = line; - info->ndev++; - - return 0; -} - -/*====================================================================*/ - -static int pfc_config(struct pcmcia_device *p_dev) -{ - unsigned int port = 0; - struct serial_info *info = p_dev->priv; - - if ((p_dev->resource[1]->end != 0) && - (resource_size(p_dev->resource[1]) == 8)) { - port = p_dev->resource[1]->start; - info->slave = 1; - } else if ((info->manfid == MANFID_OSITECH) && - (resource_size(p_dev->resource[0]) == 0x40)) { - port = p_dev->resource[0]->start + 0x28; - info->slave = 1; - } - if (info->slave) - return setup_serial(p_dev, info, port, p_dev->irq); - - dev_warn(&p_dev->dev, "no usable port range found, giving up\n"); - return -ENODEV; -} - -static int simple_config_check(struct pcmcia_device *p_dev, void *priv_data) -{ - static const int size_table[2] = { 8, 16 }; - int *try = priv_data; - - if (p_dev->resource[0]->start == 0) - return -ENODEV; - - if ((*try & 0x1) == 0) - p_dev->io_lines = 16; - - if (p_dev->resource[0]->end != size_table[(*try >> 1)]) - return -ENODEV; - - p_dev->resource[0]->end = 8; - p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; - p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; - - return pcmcia_request_io(p_dev); -} - -static int simple_config_check_notpicky(struct pcmcia_device *p_dev, - void *priv_data) -{ - static const unsigned int base[5] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, 0x0 }; - int j; - - if (p_dev->io_lines > 3) - return -ENODEV; - - p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; - p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; - p_dev->resource[0]->end = 8; - - for (j = 0; j < 5; j++) { - p_dev->resource[0]->start = base[j]; - p_dev->io_lines = base[j] ? 16 : 3; - if (!pcmcia_request_io(p_dev)) - return 0; - } - return -ENODEV; -} - -static int simple_config(struct pcmcia_device *link) -{ - struct serial_info *info = link->priv; - int i = -ENODEV, try; - - /* First pass: look for a config entry that looks normal. - * Two tries: without IO aliases, then with aliases */ - link->config_flags |= CONF_AUTO_SET_VPP | CONF_AUTO_SET_IO; - for (try = 0; try < 4; try++) - if (!pcmcia_loop_config(link, simple_config_check, &try)) - goto found_port; - - /* Second pass: try to find an entry that isn't picky about - its base address, then try to grab any standard serial port - address, and finally try to get any free port. */ - if (!pcmcia_loop_config(link, simple_config_check_notpicky, NULL)) - goto found_port; - - dev_warn(&link->dev, "no usable port range found, giving up\n"); - return -1; - -found_port: - if (info->multi && (info->manfid == MANFID_3COM)) - link->config_index &= ~(0x08); - - /* - * Apply any configuration quirks. - */ - if (info->quirk && info->quirk->config) - info->quirk->config(link); - - i = pcmcia_enable_device(link); - if (i != 0) - return -1; - return setup_serial(link, info, link->resource[0]->start, link->irq); -} - -static int multi_config_check(struct pcmcia_device *p_dev, void *priv_data) -{ - int *multi = priv_data; - - if (p_dev->resource[1]->end) - return -EINVAL; - - /* The quad port cards have bad CIS's, so just look for a - window larger than 8 ports and assume it will be right */ - if (p_dev->resource[0]->end <= 8) - return -EINVAL; - - p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; - p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; - p_dev->resource[0]->end = *multi * 8; - - if (pcmcia_request_io(p_dev)) - return -ENODEV; - return 0; -} - -static int multi_config_check_notpicky(struct pcmcia_device *p_dev, - void *priv_data) -{ - int *base2 = priv_data; - - if (!p_dev->resource[0]->end || !p_dev->resource[1]->end) - return -ENODEV; - - p_dev->resource[0]->end = p_dev->resource[1]->end = 8; - p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; - p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; - - if (pcmcia_request_io(p_dev)) - return -ENODEV; - - *base2 = p_dev->resource[0]->start + 8; - return 0; -} - -static int multi_config(struct pcmcia_device *link) -{ - struct serial_info *info = link->priv; - int i, base2 = 0; - - link->config_flags |= CONF_AUTO_SET_IO; - /* First, look for a generic full-sized window */ - if (!pcmcia_loop_config(link, multi_config_check, &info->multi)) - base2 = link->resource[0]->start + 8; - else { - /* If that didn't work, look for two windows */ - info->multi = 2; - if (pcmcia_loop_config(link, multi_config_check_notpicky, - &base2)) { - dev_warn(&link->dev, "no usable port range " - "found, giving up\n"); - return -ENODEV; - } - } - - if (!link->irq) - dev_warn(&link->dev, "no usable IRQ found, continuing...\n"); - - /* - * Apply any configuration quirks. - */ - if (info->quirk && info->quirk->config) - info->quirk->config(link); - - i = pcmcia_enable_device(link); - if (i != 0) - return -ENODEV; - - /* The Oxford Semiconductor OXCF950 cards are in fact single-port: - * 8 registers are for the UART, the others are extra registers. - * Siemen's MC45 PCMCIA (Possio's GCC) is OXCF950 based too. - */ - if (info->manfid == MANFID_OXSEMI || (info->manfid == MANFID_POSSIO && - info->prodid == PRODID_POSSIO_GCC)) { - int err; - - if (link->config_index == 1 || - link->config_index == 3) { - err = setup_serial(link, info, base2, - link->irq); - base2 = link->resource[0]->start; - } else { - err = setup_serial(link, info, link->resource[0]->start, - link->irq); - } - info->c950ctrl = base2; - - /* - * FIXME: We really should wake up the port prior to - * handing it over to the serial layer. - */ - if (info->quirk && info->quirk->wakeup) - info->quirk->wakeup(link); - - return 0; - } - - setup_serial(link, info, link->resource[0]->start, link->irq); - for (i = 0; i < info->multi - 1; i++) - setup_serial(link, info, base2 + (8 * i), - link->irq); - return 0; -} - -static int serial_check_for_multi(struct pcmcia_device *p_dev, void *priv_data) -{ - struct serial_info *info = p_dev->priv; - - if (!p_dev->resource[0]->end) - return -EINVAL; - - if ((!p_dev->resource[1]->end) && (p_dev->resource[0]->end % 8 == 0)) - info->multi = p_dev->resource[0]->end >> 3; - - if ((p_dev->resource[1]->end) && (p_dev->resource[0]->end == 8) - && (p_dev->resource[1]->end == 8)) - info->multi = 2; - - return 0; /* break */ -} - - -static int serial_config(struct pcmcia_device * link) -{ - struct serial_info *info = link->priv; - int i; - - dev_dbg(&link->dev, "serial_config\n"); - - /* Is this a compliant multifunction card? */ - info->multi = (link->socket->functions > 1); - - /* Is this a multiport card? */ - info->manfid = link->manf_id; - info->prodid = link->card_id; - - for (i = 0; i < ARRAY_SIZE(quirks); i++) - if ((quirks[i].manfid == ~0 || - quirks[i].manfid == info->manfid) && - (quirks[i].prodid == ~0 || - quirks[i].prodid == info->prodid)) { - info->quirk = &quirks[i]; - break; - } - - /* Another check for dual-serial cards: look for either serial or - multifunction cards that ask for appropriate IO port ranges */ - if ((info->multi == 0) && - (link->has_func_id) && - (link->socket->pcmcia_pfc == 0) && - ((link->func_id == CISTPL_FUNCID_MULTI) || - (link->func_id == CISTPL_FUNCID_SERIAL))) - pcmcia_loop_config(link, serial_check_for_multi, info); - - /* - * Apply any multi-port quirk. - */ - if (info->quirk && info->quirk->multi != -1) - info->multi = info->quirk->multi; - - dev_info(&link->dev, - "trying to set up [0x%04x:0x%04x] (pfc: %d, multi: %d, quirk: %p)\n", - link->manf_id, link->card_id, - link->socket->pcmcia_pfc, info->multi, info->quirk); - if (link->socket->pcmcia_pfc) - i = pfc_config(link); - else if (info->multi > 1) - i = multi_config(link); - else - i = simple_config(link); - - if (i || info->ndev == 0) - goto failed; - - /* - * Apply any post-init quirk. FIXME: This should really happen - * before we register the port, since it might already be in use. - */ - if (info->quirk && info->quirk->post) - if (info->quirk->post(link)) - goto failed; - - return 0; - -failed: - dev_warn(&link->dev, "failed to initialize\n"); - serial_remove(link); - return -ENODEV; -} - -static struct pcmcia_device_id serial_ids[] = { - PCMCIA_PFC_DEVICE_MANF_CARD(1, 0x0057, 0x0021), - PCMCIA_PFC_DEVICE_MANF_CARD(1, 0x0089, 0x110a), - PCMCIA_PFC_DEVICE_MANF_CARD(1, 0x0104, 0x000a), - PCMCIA_PFC_DEVICE_MANF_CARD(1, 0x0105, 0x0d0a), - PCMCIA_PFC_DEVICE_MANF_CARD(1, 0x0105, 0x0e0a), - PCMCIA_PFC_DEVICE_MANF_CARD(1, 0x0105, 0xea15), - PCMCIA_PFC_DEVICE_MANF_CARD(1, 0x0109, 0x0501), - PCMCIA_PFC_DEVICE_MANF_CARD(1, 0x0138, 0x110a), - PCMCIA_PFC_DEVICE_MANF_CARD(1, 0x0140, 0x000a), - PCMCIA_PFC_DEVICE_MANF_CARD(1, 0x0143, 0x3341), - PCMCIA_PFC_DEVICE_MANF_CARD(1, 0x0143, 0xc0ab), - PCMCIA_PFC_DEVICE_MANF_CARD(1, 0x016c, 0x0081), - PCMCIA_PFC_DEVICE_MANF_CARD(1, 0x021b, 0x0101), - PCMCIA_PFC_DEVICE_MANF_CARD(1, 0x08a1, 0xc0ab), - PCMCIA_PFC_DEVICE_PROD_ID123(1, "MEGAHERTZ", "CC/XJEM3288", "DATA/FAX/CELL ETHERNET MODEM", 0xf510db04, 0x04cd2988, 0x46a52d63), - PCMCIA_PFC_DEVICE_PROD_ID123(1, "MEGAHERTZ", "CC/XJEM3336", "DATA/FAX/CELL ETHERNET MODEM", 0xf510db04, 0x0143b773, 0x46a52d63), - PCMCIA_PFC_DEVICE_PROD_ID123(1, "MEGAHERTZ", "EM1144T", "PCMCIA MODEM", 0xf510db04, 0x856d66c8, 0xbd6c43ef), - PCMCIA_PFC_DEVICE_PROD_ID123(1, "MEGAHERTZ", "XJEM1144/CCEM1144", "PCMCIA MODEM", 0xf510db04, 0x52d21e1e, 0xbd6c43ef), - PCMCIA_PFC_DEVICE_PROD_ID13(1, "Xircom", "CEM28", 0x2e3ee845, 0x0ea978ea), - PCMCIA_PFC_DEVICE_PROD_ID13(1, "Xircom", "CEM33", 0x2e3ee845, 0x80609023), - PCMCIA_PFC_DEVICE_PROD_ID13(1, "Xircom", "CEM56", 0x2e3ee845, 0xa650c32a), - PCMCIA_PFC_DEVICE_PROD_ID13(1, "Xircom", "REM10", 0x2e3ee845, 0x76df1d29), - PCMCIA_PFC_DEVICE_PROD_ID13(1, "Xircom", "XEM5600", 0x2e3ee845, 0xf1403719), - PCMCIA_PFC_DEVICE_PROD_ID12(1, "AnyCom", "Fast Ethernet + 56K COMBO", 0x578ba6e7, 0xb0ac62c4), - PCMCIA_PFC_DEVICE_PROD_ID12(1, "ATKK", "LM33-PCM-T", 0xba9eb7e2, 0x077c174e), - PCMCIA_PFC_DEVICE_PROD_ID12(1, "D-Link", "DME336T", 0x1a424a1c, 0xb23897ff), - PCMCIA_PFC_DEVICE_PROD_ID12(1, "Gateway 2000", "XJEM3336", 0xdd9989be, 0x662c394c), - PCMCIA_PFC_DEVICE_PROD_ID12(1, "Grey Cell", "GCS3000", 0x2a151fac, 0x48b932ae), - PCMCIA_PFC_DEVICE_PROD_ID12(1, "Linksys", "EtherFast 10&100 + 56K PC Card (PCMLM56)", 0x0733cc81, 0xb3765033), - PCMCIA_PFC_DEVICE_PROD_ID12(1, "LINKSYS", "PCMLM336", 0xf7cb0b07, 0x7a821b58), - PCMCIA_PFC_DEVICE_PROD_ID12(1, "MEGAHERTZ", "XJEM1144/CCEM1144", 0xf510db04, 0x52d21e1e), - PCMCIA_PFC_DEVICE_PROD_ID12(1, "MICRO RESEARCH", "COMBO-L/M-336", 0xb2ced065, 0x3ced0555), - PCMCIA_PFC_DEVICE_PROD_ID12(1, "NEC", "PK-UG-J001" ,0x18df0ba0 ,0x831b1064), - PCMCIA_PFC_DEVICE_PROD_ID12(1, "Ositech", "Trumpcard:Jack of Diamonds Modem+Ethernet", 0xc2f80cd, 0x656947b9), - PCMCIA_PFC_DEVICE_PROD_ID12(1, "Ositech", "Trumpcard:Jack of Hearts Modem+Ethernet", 0xc2f80cd, 0xdc9ba5ed), - PCMCIA_PFC_DEVICE_PROD_ID12(1, "PCMCIAs", "ComboCard", 0xdcfe12d3, 0xcd8906cc), - PCMCIA_PFC_DEVICE_PROD_ID12(1, "PCMCIAs", "LanModem", 0xdcfe12d3, 0xc67c648f), - PCMCIA_PFC_DEVICE_PROD_ID12(1, "TDK", "GlobalNetworker 3410/3412", 0x1eae9475, 0xd9a93bed), - PCMCIA_PFC_DEVICE_PROD_ID12(1, "Xircom", "CreditCard Ethernet+Modem II", 0x2e3ee845, 0xeca401bf), - PCMCIA_PFC_DEVICE_MANF_CARD(1, 0x0032, 0x0e01), - PCMCIA_PFC_DEVICE_MANF_CARD(1, 0x0032, 0x0a05), - PCMCIA_PFC_DEVICE_MANF_CARD(1, 0x0032, 0x1101), - PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0104, 0x0070), - PCMCIA_MFC_DEVICE_MANF_CARD(1, 0x0101, 0x0562), - PCMCIA_MFC_DEVICE_MANF_CARD(1, 0x0104, 0x0070), - PCMCIA_MFC_DEVICE_MANF_CARD(1, 0x016c, 0x0020), - PCMCIA_MFC_DEVICE_PROD_ID123(1, "APEX DATA", "MULTICARD", "ETHERNET-MODEM", 0x11c2da09, 0x7289dc5d, 0xaad95e1f), - PCMCIA_MFC_DEVICE_PROD_ID12(1, "IBM", "Home and Away 28.8 PC Card ", 0xb569a6e5, 0x5bd4ff2c), - PCMCIA_MFC_DEVICE_PROD_ID12(1, "IBM", "Home and Away Credit Card Adapter", 0xb569a6e5, 0x4bdf15c3), - PCMCIA_MFC_DEVICE_PROD_ID12(1, "IBM", "w95 Home and Away Credit Card ", 0xb569a6e5, 0xae911c15), - PCMCIA_MFC_DEVICE_PROD_ID1(1, "Motorola MARQUIS", 0xf03e4e77), - PCMCIA_MFC_DEVICE_PROD_ID2(1, "FAX/Modem/Ethernet Combo Card ", 0x1ed59302), - PCMCIA_DEVICE_MANF_CARD(0x0089, 0x0301), - PCMCIA_DEVICE_MANF_CARD(0x00a4, 0x0276), - PCMCIA_DEVICE_MANF_CARD(0x0101, 0x0039), - PCMCIA_DEVICE_MANF_CARD(0x0104, 0x0006), - PCMCIA_DEVICE_MANF_CARD(0x0105, 0x0101), /* TDK DF2814 */ - PCMCIA_DEVICE_MANF_CARD(0x0105, 0x100a), /* Xircom CM-56G */ - PCMCIA_DEVICE_MANF_CARD(0x0105, 0x3e0a), /* TDK DF5660 */ - PCMCIA_DEVICE_MANF_CARD(0x0105, 0x410a), - PCMCIA_DEVICE_MANF_CARD(0x0107, 0x0002), /* USRobotics 14,400 */ - PCMCIA_DEVICE_MANF_CARD(0x010b, 0x0d50), - PCMCIA_DEVICE_MANF_CARD(0x010b, 0x0d51), - PCMCIA_DEVICE_MANF_CARD(0x010b, 0x0d52), - PCMCIA_DEVICE_MANF_CARD(0x010b, 0x0d53), - PCMCIA_DEVICE_MANF_CARD(0x010b, 0xd180), - PCMCIA_DEVICE_MANF_CARD(0x0115, 0x3330), /* USRobotics/SUN 14,400 */ - PCMCIA_DEVICE_MANF_CARD(0x0124, 0x0100), /* Nokia DTP-2 ver II */ - PCMCIA_DEVICE_MANF_CARD(0x0134, 0x5600), /* LASAT COMMUNICATIONS A/S */ - PCMCIA_DEVICE_MANF_CARD(0x0137, 0x000e), - PCMCIA_DEVICE_MANF_CARD(0x0137, 0x001b), - PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0025), - PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0045), - PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0052), - PCMCIA_DEVICE_MANF_CARD(0x016c, 0x0006), /* Psion 56K+Fax */ - PCMCIA_DEVICE_MANF_CARD(0x0200, 0x0001), /* MultiMobile */ - PCMCIA_DEVICE_PROD_ID134("ADV", "TECH", "COMpad-32/85", 0x67459937, 0x916d02ba, 0x8fbe92ae), - PCMCIA_DEVICE_PROD_ID124("GATEWAY2000", "CC3144", "PCMCIA MODEM", 0x506bccae, 0xcb3685f1, 0xbd6c43ef), - PCMCIA_DEVICE_PROD_ID14("MEGAHERTZ", "PCMCIA MODEM", 0xf510db04, 0xbd6c43ef), - PCMCIA_DEVICE_PROD_ID124("TOSHIBA", "T144PF", "PCMCIA MODEM", 0xb4585a1a, 0x7271409c, 0xbd6c43ef), - PCMCIA_DEVICE_PROD_ID123("FUJITSU", "FC14F ", "MBH10213", 0x6ee5a3d8, 0x30ead12b, 0xb00f05a0), - PCMCIA_DEVICE_PROD_ID123("Novatel Wireless", "Merlin UMTS Modem", "U630", 0x32607776, 0xd9e73b13, 0xe87332e), - PCMCIA_DEVICE_PROD_ID13("MEGAHERTZ", "V.34 PCMCIA MODEM", 0xf510db04, 0xbb2cce4a), - PCMCIA_DEVICE_PROD_ID12("Brain Boxes", "Bluetooth PC Card", 0xee138382, 0xd4ce9b02), - PCMCIA_DEVICE_PROD_ID12("CIRRUS LOGIC", "FAX MODEM", 0xe625f451, 0xcecd6dfa), - PCMCIA_DEVICE_PROD_ID12("COMPAQ", "PCMCIA 28800 FAX/DATA MODEM", 0xa3a3062c, 0x8cbd7c76), - PCMCIA_DEVICE_PROD_ID12("COMPAQ", "PCMCIA 33600 FAX/DATA MODEM", 0xa3a3062c, 0x5a00ce95), - PCMCIA_DEVICE_PROD_ID12("Computerboards, Inc.", "PCM-COM422", 0xd0b78f51, 0x7e2d49ed), - PCMCIA_DEVICE_PROD_ID12("Dr. Neuhaus", "FURY CARD 14K4", 0x76942813, 0x8b96ce65), - PCMCIA_DEVICE_PROD_ID12("IBM", "ISDN/56K/GSM", 0xb569a6e5, 0xfee5297b), - PCMCIA_DEVICE_PROD_ID12("Intelligent", "ANGIA FAX/MODEM", 0xb496e65e, 0xf31602a6), - PCMCIA_DEVICE_PROD_ID12("Intel", "MODEM 2400+", 0x816cc815, 0x412729fb), - PCMCIA_DEVICE_PROD_ID12("Intertex", "IX34-PCMCIA", 0xf8a097e3, 0x97880447), - PCMCIA_DEVICE_PROD_ID12("IOTech Inc ", "PCMCIA Dual RS-232 Serial Port Card", 0x3bd2d898, 0x92abc92f), - PCMCIA_DEVICE_PROD_ID12("MACRONIX", "FAX/MODEM", 0x668388b3, 0x3f9bdf2f), - PCMCIA_DEVICE_PROD_ID12("Multi-Tech", "MT1432LT", 0x5f73be51, 0x0b3e2383), - PCMCIA_DEVICE_PROD_ID12("Multi-Tech", "MT2834LT", 0x5f73be51, 0x4cd7c09e), - PCMCIA_DEVICE_PROD_ID12("OEM ", "C288MX ", 0xb572d360, 0xd2385b7a), - PCMCIA_DEVICE_PROD_ID12("Option International", "V34bis GSM/PSTN Data/Fax Modem", 0x9d7cd6f5, 0x5cb8bf41), - PCMCIA_DEVICE_PROD_ID12("PCMCIA ", "C336MX ", 0x99bcafe9, 0xaa25bcab), - PCMCIA_DEVICE_PROD_ID12("Quatech Inc", "PCMCIA Dual RS-232 Serial Port Card", 0xc4420b35, 0x92abc92f), - PCMCIA_DEVICE_PROD_ID12("Quatech Inc", "Dual RS-232 Serial Port PC Card", 0xc4420b35, 0x031a380d), - PCMCIA_DEVICE_PROD_ID12("Telia", "SurfinBird 560P/A+", 0xe2cdd5e, 0xc9314b38), - PCMCIA_DEVICE_PROD_ID1("Smart Serial Port", 0x2d8ce292), - PCMCIA_PFC_DEVICE_CIS_PROD_ID12(1, "PCMCIA", "EN2218-LAN/MODEM", 0x281f1c5d, 0x570f348e, "cis/PCMLM28.cis"), - PCMCIA_PFC_DEVICE_CIS_PROD_ID12(1, "PCMCIA", "UE2218-LAN/MODEM", 0x281f1c5d, 0x6fdcacee, "cis/PCMLM28.cis"), - PCMCIA_PFC_DEVICE_CIS_PROD_ID12(1, "Psion Dacom", "Gold Card V34 Ethernet", 0xf5f025c2, 0x338e8155, "cis/PCMLM28.cis"), - PCMCIA_PFC_DEVICE_CIS_PROD_ID12(1, "Psion Dacom", "Gold Card V34 Ethernet GSM", 0xf5f025c2, 0x4ae85d35, "cis/PCMLM28.cis"), - PCMCIA_PFC_DEVICE_CIS_PROD_ID12(1, "LINKSYS", "PCMLM28", 0xf7cb0b07, 0x66881874, "cis/PCMLM28.cis"), - PCMCIA_PFC_DEVICE_CIS_PROD_ID12(1, "TOSHIBA", "Modem/LAN Card", 0xb4585a1a, 0x53f922f8, "cis/PCMLM28.cis"), - PCMCIA_MFC_DEVICE_CIS_PROD_ID12(1, "DAYNA COMMUNICATIONS", "LAN AND MODEM MULTIFUNCTION", 0x8fdf8f89, 0xdd5ed9e8, "cis/DP83903.cis"), - PCMCIA_MFC_DEVICE_CIS_PROD_ID4(1, "NSC MF LAN/Modem", 0x58fc6056, "cis/DP83903.cis"), - PCMCIA_MFC_DEVICE_CIS_MANF_CARD(1, 0x0101, 0x0556, "cis/3CCFEM556.cis"), - PCMCIA_MFC_DEVICE_CIS_MANF_CARD(1, 0x0175, 0x0000, "cis/DP83903.cis"), - PCMCIA_MFC_DEVICE_CIS_MANF_CARD(1, 0x0101, 0x0035, "cis/3CXEM556.cis"), - PCMCIA_MFC_DEVICE_CIS_MANF_CARD(1, 0x0101, 0x003d, "cis/3CXEM556.cis"), - PCMCIA_DEVICE_CIS_PROD_ID12("Sierra Wireless", "AC850", 0xd85f6206, 0x42a2c018, "cis/SW_8xx_SER.cis"), /* Sierra Wireless AC850 3G Network Adapter R1 */ - PCMCIA_DEVICE_CIS_PROD_ID12("Sierra Wireless", "AC860", 0xd85f6206, 0x698f93db, "cis/SW_8xx_SER.cis"), /* Sierra Wireless AC860 3G Network Adapter R1 */ - PCMCIA_DEVICE_CIS_PROD_ID12("Sierra Wireless", "AC710/AC750", 0xd85f6206, 0x761b11e0, "cis/SW_7xx_SER.cis"), /* Sierra Wireless AC710/AC750 GPRS Network Adapter R1 */ - PCMCIA_DEVICE_CIS_MANF_CARD(0x0192, 0xa555, "cis/SW_555_SER.cis"), /* Sierra Aircard 555 CDMA 1xrtt Modem -- pre update */ - PCMCIA_DEVICE_CIS_MANF_CARD(0x013f, 0xa555, "cis/SW_555_SER.cis"), /* Sierra Aircard 555 CDMA 1xrtt Modem -- post update */ - PCMCIA_DEVICE_CIS_PROD_ID12("MultiTech", "PCMCIA 56K DataFax", 0x842047ee, 0xc2efcf03, "cis/MT5634ZLX.cis"), - PCMCIA_DEVICE_CIS_PROD_ID12("ADVANTECH", "COMpad-32/85B-2", 0x96913a85, 0x27ab5437, "cis/COMpad2.cis"), - PCMCIA_DEVICE_CIS_PROD_ID12("ADVANTECH", "COMpad-32/85B-4", 0x96913a85, 0xcec8f102, "cis/COMpad4.cis"), - PCMCIA_DEVICE_CIS_PROD_ID123("ADVANTECH", "COMpad-32/85", "1.0", 0x96913a85, 0x8fbe92ae, 0x0877b627, "cis/COMpad2.cis"), - PCMCIA_DEVICE_CIS_PROD_ID2("RS-COM 2P", 0xad20b156, "cis/RS-COM-2P.cis"), - PCMCIA_DEVICE_CIS_MANF_CARD(0x0013, 0x0000, "cis/GLOBETROTTER.cis"), - PCMCIA_DEVICE_PROD_ID12("ELAN DIGITAL SYSTEMS LTD, c1997.","SERIAL CARD: SL100 1.00.",0x19ca78af,0xf964f42b), - PCMCIA_DEVICE_PROD_ID12("ELAN DIGITAL SYSTEMS LTD, c1997.","SERIAL CARD: SL100",0x19ca78af,0x71d98e83), - PCMCIA_DEVICE_PROD_ID12("ELAN DIGITAL SYSTEMS LTD, c1997.","SERIAL CARD: SL232 1.00.",0x19ca78af,0x69fb7490), - PCMCIA_DEVICE_PROD_ID12("ELAN DIGITAL SYSTEMS LTD, c1997.","SERIAL CARD: SL232",0x19ca78af,0xb6bc0235), - PCMCIA_DEVICE_PROD_ID12("ELAN DIGITAL SYSTEMS LTD, c2000.","SERIAL CARD: CF232",0x63f2e0bd,0xb9e175d3), - PCMCIA_DEVICE_PROD_ID12("ELAN DIGITAL SYSTEMS LTD, c2000.","SERIAL CARD: CF232-5",0x63f2e0bd,0xfce33442), - PCMCIA_DEVICE_PROD_ID12("Elan","Serial Port: CF232",0x3beb8cf2,0x171e7190), - PCMCIA_DEVICE_PROD_ID12("Elan","Serial Port: CF232-5",0x3beb8cf2,0x20da4262), - PCMCIA_DEVICE_PROD_ID12("Elan","Serial Port: CF428",0x3beb8cf2,0xea5dd57d), - PCMCIA_DEVICE_PROD_ID12("Elan","Serial Port: CF500",0x3beb8cf2,0xd77255fa), - PCMCIA_DEVICE_PROD_ID12("Elan","Serial Port: IC232",0x3beb8cf2,0x6a709903), - PCMCIA_DEVICE_PROD_ID12("Elan","Serial Port: SL232",0x3beb8cf2,0x18430676), - PCMCIA_DEVICE_PROD_ID12("Elan","Serial Port: XL232",0x3beb8cf2,0x6f933767), - PCMCIA_MFC_DEVICE_PROD_ID12(0,"Elan","Serial Port: CF332",0x3beb8cf2,0x16dc1ba7), - PCMCIA_MFC_DEVICE_PROD_ID12(0,"Elan","Serial Port: SL332",0x3beb8cf2,0x19816c41), - PCMCIA_MFC_DEVICE_PROD_ID12(0,"Elan","Serial Port: SL385",0x3beb8cf2,0x64112029), - PCMCIA_MFC_DEVICE_PROD_ID12(0,"Elan","Serial Port: SL432",0x3beb8cf2,0x1cce7ac4), - PCMCIA_MFC_DEVICE_PROD_ID12(0,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc), - PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial Port: CF332",0x3beb8cf2,0x16dc1ba7), - PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial Port: SL332",0x3beb8cf2,0x19816c41), - PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial Port: SL385",0x3beb8cf2,0x64112029), - PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial Port: SL432",0x3beb8cf2,0x1cce7ac4), - PCMCIA_MFC_DEVICE_PROD_ID12(2,"Elan","Serial Port: SL432",0x3beb8cf2,0x1cce7ac4), - PCMCIA_MFC_DEVICE_PROD_ID12(3,"Elan","Serial Port: SL432",0x3beb8cf2,0x1cce7ac4), - PCMCIA_DEVICE_MANF_CARD(0x0279, 0x950b), - /* too generic */ - /* PCMCIA_MFC_DEVICE_MANF_CARD(0, 0x0160, 0x0002), */ - /* PCMCIA_MFC_DEVICE_MANF_CARD(1, 0x0160, 0x0002), */ - PCMCIA_DEVICE_FUNC_ID(2), - PCMCIA_DEVICE_NULL, -}; -MODULE_DEVICE_TABLE(pcmcia, serial_ids); - -MODULE_FIRMWARE("cis/PCMLM28.cis"); -MODULE_FIRMWARE("cis/DP83903.cis"); -MODULE_FIRMWARE("cis/3CCFEM556.cis"); -MODULE_FIRMWARE("cis/3CXEM556.cis"); -MODULE_FIRMWARE("cis/SW_8xx_SER.cis"); -MODULE_FIRMWARE("cis/SW_7xx_SER.cis"); -MODULE_FIRMWARE("cis/SW_555_SER.cis"); -MODULE_FIRMWARE("cis/MT5634ZLX.cis"); -MODULE_FIRMWARE("cis/COMpad2.cis"); -MODULE_FIRMWARE("cis/COMpad4.cis"); -MODULE_FIRMWARE("cis/RS-COM-2P.cis"); - -static struct pcmcia_driver serial_cs_driver = { - .owner = THIS_MODULE, - .name = "serial_cs", - .probe = serial_probe, - .remove = serial_detach, - .id_table = serial_ids, - .suspend = serial_suspend, - .resume = serial_resume, -}; - -static int __init init_serial_cs(void) -{ - return pcmcia_register_driver(&serial_cs_driver); -} - -static void __exit exit_serial_cs(void) -{ - pcmcia_unregister_driver(&serial_cs_driver); -} - -module_init(init_serial_cs); -module_exit(exit_serial_cs); - -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/serial_ks8695.c b/drivers/serial/serial_ks8695.c deleted file mode 100644 index b1962025b1aa..000000000000 --- a/drivers/serial/serial_ks8695.c +++ /dev/null @@ -1,705 +0,0 @@ -/* - * drivers/serial/serial_ks8695.c - * - * Driver for KS8695 serial ports - * - * Based on drivers/serial/serial_amba.c, by Kam Lee. - * - * Copyright 2002-2005 Micrel Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - */ -#include <linux/module.h> -#include <linux/tty.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/serial.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/device.h> - -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/mach/irq.h> - -#include <mach/regs-uart.h> -#include <mach/regs-irq.h> - -#if defined(CONFIG_SERIAL_KS8695_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/serial_core.h> - - -#define SERIAL_KS8695_MAJOR 204 -#define SERIAL_KS8695_MINOR 16 -#define SERIAL_KS8695_DEVNAME "ttyAM" - -#define SERIAL_KS8695_NR 1 - -/* - * Access macros for the KS8695 UART - */ -#define UART_GET_CHAR(p) (__raw_readl((p)->membase + KS8695_URRB) & 0xFF) -#define UART_PUT_CHAR(p, c) __raw_writel((c), (p)->membase + KS8695_URTH) -#define UART_GET_FCR(p) __raw_readl((p)->membase + KS8695_URFC) -#define UART_PUT_FCR(p, c) __raw_writel((c), (p)->membase + KS8695_URFC) -#define UART_GET_MSR(p) __raw_readl((p)->membase + KS8695_URMS) -#define UART_GET_LSR(p) __raw_readl((p)->membase + KS8695_URLS) -#define UART_GET_LCR(p) __raw_readl((p)->membase + KS8695_URLC) -#define UART_PUT_LCR(p, c) __raw_writel((c), (p)->membase + KS8695_URLC) -#define UART_GET_MCR(p) __raw_readl((p)->membase + KS8695_URMC) -#define UART_PUT_MCR(p, c) __raw_writel((c), (p)->membase + KS8695_URMC) -#define UART_GET_BRDR(p) __raw_readl((p)->membase + KS8695_URBD) -#define UART_PUT_BRDR(p, c) __raw_writel((c), (p)->membase + KS8695_URBD) - -#define KS8695_CLR_TX_INT() __raw_writel(1 << KS8695_IRQ_UART_TX, KS8695_IRQ_VA + KS8695_INTST) - -#define UART_DUMMY_LSR_RX 0x100 -#define UART_PORT_SIZE (KS8695_USR - KS8695_URRB + 4) - -static inline int tx_enabled(struct uart_port *port) -{ - return port->unused[0] & 1; -} - -static inline int rx_enabled(struct uart_port *port) -{ - return port->unused[0] & 2; -} - -static inline int ms_enabled(struct uart_port *port) -{ - return port->unused[0] & 4; -} - -static inline void ms_enable(struct uart_port *port, int enabled) -{ - if(enabled) - port->unused[0] |= 4; - else - port->unused[0] &= ~4; -} - -static inline void rx_enable(struct uart_port *port, int enabled) -{ - if(enabled) - port->unused[0] |= 2; - else - port->unused[0] &= ~2; -} - -static inline void tx_enable(struct uart_port *port, int enabled) -{ - if(enabled) - port->unused[0] |= 1; - else - port->unused[0] &= ~1; -} - - -#ifdef SUPPORT_SYSRQ -static struct console ks8695_console; -#endif - -static void ks8695uart_stop_tx(struct uart_port *port) -{ - if (tx_enabled(port)) { - /* use disable_irq_nosync() and not disable_irq() to avoid self - * imposed deadlock by not waiting for irq handler to end, - * since this ks8695uart_stop_tx() is called from interrupt context. - */ - disable_irq_nosync(KS8695_IRQ_UART_TX); - tx_enable(port, 0); - } -} - -static void ks8695uart_start_tx(struct uart_port *port) -{ - if (!tx_enabled(port)) { - enable_irq(KS8695_IRQ_UART_TX); - tx_enable(port, 1); - } -} - -static void ks8695uart_stop_rx(struct uart_port *port) -{ - if (rx_enabled(port)) { - disable_irq(KS8695_IRQ_UART_RX); - rx_enable(port, 0); - } -} - -static void ks8695uart_enable_ms(struct uart_port *port) -{ - if (!ms_enabled(port)) { - enable_irq(KS8695_IRQ_UART_MODEM_STATUS); - ms_enable(port,1); - } -} - -static void ks8695uart_disable_ms(struct uart_port *port) -{ - if (ms_enabled(port)) { - disable_irq(KS8695_IRQ_UART_MODEM_STATUS); - ms_enable(port,0); - } -} - -static irqreturn_t ks8695uart_rx_chars(int irq, void *dev_id) -{ - struct uart_port *port = dev_id; - struct tty_struct *tty = port->state->port.tty; - unsigned int status, ch, lsr, flg, max_count = 256; - - status = UART_GET_LSR(port); /* clears pending LSR interrupts */ - while ((status & URLS_URDR) && max_count--) { - ch = UART_GET_CHAR(port); - flg = TTY_NORMAL; - - port->icount.rx++; - - /* - * Note that the error handling code is - * out of the main execution path - */ - lsr = UART_GET_LSR(port) | UART_DUMMY_LSR_RX; - if (unlikely(lsr & (URLS_URBI | URLS_URPE | URLS_URFE | URLS_URROE))) { - if (lsr & URLS_URBI) { - lsr &= ~(URLS_URFE | URLS_URPE); - port->icount.brk++; - if (uart_handle_break(port)) - goto ignore_char; - } - if (lsr & URLS_URPE) - port->icount.parity++; - if (lsr & URLS_URFE) - port->icount.frame++; - if (lsr & URLS_URROE) - port->icount.overrun++; - - lsr &= port->read_status_mask; - - if (lsr & URLS_URBI) - flg = TTY_BREAK; - else if (lsr & URLS_URPE) - flg = TTY_PARITY; - else if (lsr & URLS_URFE) - flg = TTY_FRAME; - } - - if (uart_handle_sysrq_char(port, ch)) - goto ignore_char; - - uart_insert_char(port, lsr, URLS_URROE, ch, flg); - -ignore_char: - status = UART_GET_LSR(port); - } - tty_flip_buffer_push(tty); - - return IRQ_HANDLED; -} - - -static irqreturn_t ks8695uart_tx_chars(int irq, void *dev_id) -{ - struct uart_port *port = dev_id; - struct circ_buf *xmit = &port->state->xmit; - unsigned int count; - - if (port->x_char) { - KS8695_CLR_TX_INT(); - UART_PUT_CHAR(port, port->x_char); - port->icount.tx++; - port->x_char = 0; - return IRQ_HANDLED; - } - - if (uart_tx_stopped(port) || uart_circ_empty(xmit)) { - ks8695uart_stop_tx(port); - return IRQ_HANDLED; - } - - count = 16; /* fifo size */ - while (!uart_circ_empty(xmit) && (count-- > 0)) { - KS8695_CLR_TX_INT(); - UART_PUT_CHAR(port, xmit->buf[xmit->tail]); - - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (uart_circ_empty(xmit)) - ks8695uart_stop_tx(port); - - return IRQ_HANDLED; -} - -static irqreturn_t ks8695uart_modem_status(int irq, void *dev_id) -{ - struct uart_port *port = dev_id; - unsigned int status; - - /* - * clear modem interrupt by reading MSR - */ - status = UART_GET_MSR(port); - - if (status & URMS_URDDCD) - uart_handle_dcd_change(port, status & URMS_URDDCD); - - if (status & URMS_URDDST) - port->icount.dsr++; - - if (status & URMS_URDCTS) - uart_handle_cts_change(port, status & URMS_URDCTS); - - if (status & URMS_URTERI) - port->icount.rng++; - - wake_up_interruptible(&port->state->port.delta_msr_wait); - - return IRQ_HANDLED; -} - -static unsigned int ks8695uart_tx_empty(struct uart_port *port) -{ - return (UART_GET_LSR(port) & URLS_URTE) ? TIOCSER_TEMT : 0; -} - -static unsigned int ks8695uart_get_mctrl(struct uart_port *port) -{ - unsigned int result = 0; - unsigned int status; - - status = UART_GET_MSR(port); - if (status & URMS_URDCD) - result |= TIOCM_CAR; - if (status & URMS_URDSR) - result |= TIOCM_DSR; - if (status & URMS_URCTS) - result |= TIOCM_CTS; - if (status & URMS_URRI) - result |= TIOCM_RI; - - return result; -} - -static void ks8695uart_set_mctrl(struct uart_port *port, u_int mctrl) -{ - unsigned int mcr; - - mcr = UART_GET_MCR(port); - if (mctrl & TIOCM_RTS) - mcr |= URMC_URRTS; - else - mcr &= ~URMC_URRTS; - - if (mctrl & TIOCM_DTR) - mcr |= URMC_URDTR; - else - mcr &= ~URMC_URDTR; - - UART_PUT_MCR(port, mcr); -} - -static void ks8695uart_break_ctl(struct uart_port *port, int break_state) -{ - unsigned int lcr; - - lcr = UART_GET_LCR(port); - - if (break_state == -1) - lcr |= URLC_URSBC; - else - lcr &= ~URLC_URSBC; - - UART_PUT_LCR(port, lcr); -} - -static int ks8695uart_startup(struct uart_port *port) -{ - int retval; - - set_irq_flags(KS8695_IRQ_UART_TX, IRQF_VALID | IRQF_NOAUTOEN); - tx_enable(port, 0); - rx_enable(port, 1); - ms_enable(port, 1); - - /* - * Allocate the IRQ - */ - retval = request_irq(KS8695_IRQ_UART_TX, ks8695uart_tx_chars, IRQF_DISABLED, "UART TX", port); - if (retval) - goto err_tx; - - retval = request_irq(KS8695_IRQ_UART_RX, ks8695uart_rx_chars, IRQF_DISABLED, "UART RX", port); - if (retval) - goto err_rx; - - retval = request_irq(KS8695_IRQ_UART_LINE_STATUS, ks8695uart_rx_chars, IRQF_DISABLED, "UART LineStatus", port); - if (retval) - goto err_ls; - - retval = request_irq(KS8695_IRQ_UART_MODEM_STATUS, ks8695uart_modem_status, IRQF_DISABLED, "UART ModemStatus", port); - if (retval) - goto err_ms; - - return 0; - -err_ms: - free_irq(KS8695_IRQ_UART_LINE_STATUS, port); -err_ls: - free_irq(KS8695_IRQ_UART_RX, port); -err_rx: - free_irq(KS8695_IRQ_UART_TX, port); -err_tx: - return retval; -} - -static void ks8695uart_shutdown(struct uart_port *port) -{ - /* - * Free the interrupt - */ - free_irq(KS8695_IRQ_UART_RX, port); - free_irq(KS8695_IRQ_UART_TX, port); - free_irq(KS8695_IRQ_UART_MODEM_STATUS, port); - free_irq(KS8695_IRQ_UART_LINE_STATUS, port); - - /* disable break condition and fifos */ - UART_PUT_LCR(port, UART_GET_LCR(port) & ~URLC_URSBC); - UART_PUT_FCR(port, UART_GET_FCR(port) & ~URFC_URFE); -} - -static void ks8695uart_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) -{ - unsigned int lcr, fcr = 0; - unsigned long flags; - unsigned int baud, quot; - - /* - * Ask the core to calculate the divisor for us. - */ - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); - quot = uart_get_divisor(port, baud); - - switch (termios->c_cflag & CSIZE) { - case CS5: - lcr = URCL_5; - break; - case CS6: - lcr = URCL_6; - break; - case CS7: - lcr = URCL_7; - break; - default: - lcr = URCL_8; - break; - } - - /* stop bits */ - if (termios->c_cflag & CSTOPB) - lcr |= URLC_URSB; - - /* parity */ - if (termios->c_cflag & PARENB) { - if (termios->c_cflag & CMSPAR) { /* Mark or Space parity */ - if (termios->c_cflag & PARODD) - lcr |= URPE_MARK; - else - lcr |= URPE_SPACE; - } - else if (termios->c_cflag & PARODD) - lcr |= URPE_ODD; - else - lcr |= URPE_EVEN; - } - - if (port->fifosize > 1) - fcr = URFC_URFRT_8 | URFC_URTFR | URFC_URRFR | URFC_URFE; - - spin_lock_irqsave(&port->lock, flags); - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - port->read_status_mask = URLS_URROE; - if (termios->c_iflag & INPCK) - port->read_status_mask |= (URLS_URFE | URLS_URPE); - if (termios->c_iflag & (BRKINT | PARMRK)) - port->read_status_mask |= URLS_URBI; - - /* - * Characters to ignore - */ - port->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= (URLS_URFE | URLS_URPE); - if (termios->c_iflag & IGNBRK) { - port->ignore_status_mask |= URLS_URBI; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= URLS_URROE; - } - - /* - * Ignore all characters if CREAD is not set. - */ - if ((termios->c_cflag & CREAD) == 0) - port->ignore_status_mask |= UART_DUMMY_LSR_RX; - - /* first, disable everything */ - if (UART_ENABLE_MS(port, termios->c_cflag)) - ks8695uart_enable_ms(port); - else - ks8695uart_disable_ms(port); - - /* Set baud rate */ - UART_PUT_BRDR(port, quot); - - UART_PUT_LCR(port, lcr); - UART_PUT_FCR(port, fcr); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *ks8695uart_type(struct uart_port *port) -{ - return port->type == PORT_KS8695 ? "KS8695" : NULL; -} - -/* - * Release the memory region(s) being used by 'port' - */ -static void ks8695uart_release_port(struct uart_port *port) -{ - release_mem_region(port->mapbase, UART_PORT_SIZE); -} - -/* - * Request the memory region(s) being used by 'port' - */ -static int ks8695uart_request_port(struct uart_port *port) -{ - return request_mem_region(port->mapbase, UART_PORT_SIZE, - "serial_ks8695") != NULL ? 0 : -EBUSY; -} - -/* - * Configure/autoconfigure the port. - */ -static void ks8695uart_config_port(struct uart_port *port, int flags) -{ - if (flags & UART_CONFIG_TYPE) { - port->type = PORT_KS8695; - ks8695uart_request_port(port); - } -} - -/* - * verify the new serial_struct (for TIOCSSERIAL). - */ -static int ks8695uart_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - int ret = 0; - - if (ser->type != PORT_UNKNOWN && ser->type != PORT_KS8695) - ret = -EINVAL; - if (ser->irq != port->irq) - ret = -EINVAL; - if (ser->baud_base < 9600) - ret = -EINVAL; - return ret; -} - -static struct uart_ops ks8695uart_pops = { - .tx_empty = ks8695uart_tx_empty, - .set_mctrl = ks8695uart_set_mctrl, - .get_mctrl = ks8695uart_get_mctrl, - .stop_tx = ks8695uart_stop_tx, - .start_tx = ks8695uart_start_tx, - .stop_rx = ks8695uart_stop_rx, - .enable_ms = ks8695uart_enable_ms, - .break_ctl = ks8695uart_break_ctl, - .startup = ks8695uart_startup, - .shutdown = ks8695uart_shutdown, - .set_termios = ks8695uart_set_termios, - .type = ks8695uart_type, - .release_port = ks8695uart_release_port, - .request_port = ks8695uart_request_port, - .config_port = ks8695uart_config_port, - .verify_port = ks8695uart_verify_port, -}; - -static struct uart_port ks8695uart_ports[SERIAL_KS8695_NR] = { - { - .membase = (void *) KS8695_UART_VA, - .mapbase = KS8695_UART_VA, - .iotype = SERIAL_IO_MEM, - .irq = KS8695_IRQ_UART_TX, - .uartclk = KS8695_CLOCK_RATE * 16, - .fifosize = 16, - .ops = &ks8695uart_pops, - .flags = ASYNC_BOOT_AUTOCONF, - .line = 0, - } -}; - -#ifdef CONFIG_SERIAL_KS8695_CONSOLE -static void ks8695_console_putchar(struct uart_port *port, int ch) -{ - while (!(UART_GET_LSR(port) & URLS_URTHRE)) - barrier(); - - UART_PUT_CHAR(port, ch); -} - -static void ks8695_console_write(struct console *co, const char *s, u_int count) -{ - struct uart_port *port = ks8695uart_ports + co->index; - - uart_console_write(port, s, count, ks8695_console_putchar); -} - -static void __init ks8695_console_get_options(struct uart_port *port, int *baud, int *parity, int *bits) -{ - unsigned int lcr; - - lcr = UART_GET_LCR(port); - - switch (lcr & URLC_PARITY) { - case URPE_ODD: - *parity = 'o'; - break; - case URPE_EVEN: - *parity = 'e'; - break; - default: - *parity = 'n'; - } - - switch (lcr & URLC_URCL) { - case URCL_5: - *bits = 5; - break; - case URCL_6: - *bits = 6; - break; - case URCL_7: - *bits = 7; - break; - default: - *bits = 8; - } - - *baud = port->uartclk / (UART_GET_BRDR(port) & 0x0FFF); - *baud /= 16; - *baud &= 0xFFFFFFF0; -} - -static int __init ks8695_console_setup(struct console *co, char *options) -{ - struct uart_port *port; - int baud = 115200; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - port = uart_get_console(ks8695uart_ports, SERIAL_KS8695_NR, co); - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - else - ks8695_console_get_options(port, &baud, &parity, &bits); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - -static struct uart_driver ks8695_reg; - -static struct console ks8695_console = { - .name = SERIAL_KS8695_DEVNAME, - .write = ks8695_console_write, - .device = uart_console_device, - .setup = ks8695_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &ks8695_reg, -}; - -static int __init ks8695_console_init(void) -{ - add_preferred_console(SERIAL_KS8695_DEVNAME, 0, NULL); - register_console(&ks8695_console); - return 0; -} - -console_initcall(ks8695_console_init); - -#define KS8695_CONSOLE &ks8695_console -#else -#define KS8695_CONSOLE NULL -#endif - -static struct uart_driver ks8695_reg = { - .owner = THIS_MODULE, - .driver_name = "serial_ks8695", - .dev_name = SERIAL_KS8695_DEVNAME, - .major = SERIAL_KS8695_MAJOR, - .minor = SERIAL_KS8695_MINOR, - .nr = SERIAL_KS8695_NR, - .cons = KS8695_CONSOLE, -}; - -static int __init ks8695uart_init(void) -{ - int i, ret; - - printk(KERN_INFO "Serial: Micrel KS8695 UART driver\n"); - - ret = uart_register_driver(&ks8695_reg); - if (ret) - return ret; - - for (i = 0; i < SERIAL_KS8695_NR; i++) - uart_add_one_port(&ks8695_reg, &ks8695uart_ports[0]); - - return 0; -} - -static void __exit ks8695uart_exit(void) -{ - int i; - - for (i = 0; i < SERIAL_KS8695_NR; i++) - uart_remove_one_port(&ks8695_reg, &ks8695uart_ports[0]); - uart_unregister_driver(&ks8695_reg); -} - -module_init(ks8695uart_init); -module_exit(ks8695uart_exit); - -MODULE_DESCRIPTION("KS8695 serial port driver"); -MODULE_AUTHOR("Micrel Inc."); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/serial_lh7a40x.c b/drivers/serial/serial_lh7a40x.c deleted file mode 100644 index ea744707c4d6..000000000000 --- a/drivers/serial/serial_lh7a40x.c +++ /dev/null @@ -1,682 +0,0 @@ -/* drivers/serial/serial_lh7a40x.c - * - * Copyright (C) 2004 Coastal Environmental Systems - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * version 2 as published by the Free Software Foundation. - * - */ - -/* Driver for Sharp LH7A40X embedded serial ports - * - * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. - * Based on drivers/serial/amba.c, by Deep Blue Solutions Ltd. - * - * --- - * - * This driver supports the embedded UARTs of the Sharp LH7A40X series - * CPUs. While similar to the 16550 and other UART chips, there is - * nothing close to register compatibility. Moreover, some of the - * modem control lines are not available, either in the chip or they - * are lacking in the board-level implementation. - * - * - Use of SIRDIS - * For simplicity, we disable the IR functions of any UART whenever - * we enable it. - * - */ - - -#if defined(CONFIG_SERIAL_LH7A40X_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/sysrq.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/serial.h> -#include <linux/io.h> - -#include <asm/irq.h> -#include <mach/hardware.h> - -#define DEV_MAJOR 204 -#define DEV_MINOR 16 -#define DEV_NR 3 - -#define ISR_LOOP_LIMIT 256 - -#define UR(p,o) _UR ((p)->membase, o) -#define _UR(b,o) (*((volatile unsigned int*)(((unsigned char*) b) + (o)))) -#define BIT_CLR(p,o,m) UR(p,o) = UR(p,o) & (~(unsigned int)m) -#define BIT_SET(p,o,m) UR(p,o) = UR(p,o) | ( (unsigned int)m) - -#define UART_REG_SIZE 32 - -#define UART_R_DATA (0x00) -#define UART_R_FCON (0x04) -#define UART_R_BRCON (0x08) -#define UART_R_CON (0x0c) -#define UART_R_STATUS (0x10) -#define UART_R_RAWISR (0x14) -#define UART_R_INTEN (0x18) -#define UART_R_ISR (0x1c) - -#define UARTEN (0x01) /* UART enable */ -#define SIRDIS (0x02) /* Serial IR disable (UART1 only) */ - -#define RxEmpty (0x10) -#define TxEmpty (0x80) -#define TxFull (0x20) -#define nRxRdy RxEmpty -#define nTxRdy TxFull -#define TxBusy (0x08) - -#define RxBreak (0x0800) -#define RxOverrunError (0x0400) -#define RxParityError (0x0200) -#define RxFramingError (0x0100) -#define RxError (RxBreak | RxOverrunError | RxParityError | RxFramingError) - -#define DCD (0x04) -#define DSR (0x02) -#define CTS (0x01) - -#define RxInt (0x01) -#define TxInt (0x02) -#define ModemInt (0x04) -#define RxTimeoutInt (0x08) - -#define MSEOI (0x10) - -#define WLEN_8 (0x60) -#define WLEN_7 (0x40) -#define WLEN_6 (0x20) -#define WLEN_5 (0x00) -#define WLEN (0x60) /* Mask for all word-length bits */ -#define STP2 (0x08) -#define PEN (0x02) /* Parity Enable */ -#define EPS (0x04) /* Even Parity Set */ -#define FEN (0x10) /* FIFO Enable */ -#define BRK (0x01) /* Send Break */ - - -struct uart_port_lh7a40x { - struct uart_port port; - unsigned int statusPrev; /* Most recently read modem status */ -}; - -static void lh7a40xuart_stop_tx (struct uart_port* port) -{ - BIT_CLR (port, UART_R_INTEN, TxInt); -} - -static void lh7a40xuart_start_tx (struct uart_port* port) -{ - BIT_SET (port, UART_R_INTEN, TxInt); - - /* *** FIXME: do I need to check for startup of the - transmitter? The old driver did, but AMBA - doesn't . */ -} - -static void lh7a40xuart_stop_rx (struct uart_port* port) -{ - BIT_SET (port, UART_R_INTEN, RxTimeoutInt | RxInt); -} - -static void lh7a40xuart_enable_ms (struct uart_port* port) -{ - BIT_SET (port, UART_R_INTEN, ModemInt); -} - -static void lh7a40xuart_rx_chars (struct uart_port* port) -{ - struct tty_struct* tty = port->state->port.tty; - int cbRxMax = 256; /* (Gross) limit on receive */ - unsigned int data; /* Received data and status */ - unsigned int flag; - - while (!(UR (port, UART_R_STATUS) & nRxRdy) && --cbRxMax) { - data = UR (port, UART_R_DATA); - flag = TTY_NORMAL; - ++port->icount.rx; - - if (unlikely(data & RxError)) { - if (data & RxBreak) { - data &= ~(RxFramingError | RxParityError); - ++port->icount.brk; - if (uart_handle_break (port)) - continue; - } - else if (data & RxParityError) - ++port->icount.parity; - else if (data & RxFramingError) - ++port->icount.frame; - if (data & RxOverrunError) - ++port->icount.overrun; - - /* Mask by termios, leave Rx'd byte */ - data &= port->read_status_mask | 0xff; - - if (data & RxBreak) - flag = TTY_BREAK; - else if (data & RxParityError) - flag = TTY_PARITY; - else if (data & RxFramingError) - flag = TTY_FRAME; - } - - if (uart_handle_sysrq_char (port, (unsigned char) data)) - continue; - - uart_insert_char(port, data, RxOverrunError, data, flag); - } - tty_flip_buffer_push (tty); - return; -} - -static void lh7a40xuart_tx_chars (struct uart_port* port) -{ - struct circ_buf* xmit = &port->state->xmit; - int cbTxMax = port->fifosize; - - if (port->x_char) { - UR (port, UART_R_DATA) = port->x_char; - ++port->icount.tx; - port->x_char = 0; - return; - } - if (uart_circ_empty (xmit) || uart_tx_stopped (port)) { - lh7a40xuart_stop_tx (port); - return; - } - - /* Unlike the AMBA UART, the lh7a40x UART does not guarantee - that at least half of the FIFO is empty. Instead, we check - status for every character. Using the AMBA method causes - the transmitter to drop characters. */ - - do { - UR (port, UART_R_DATA) = xmit->buf[xmit->tail]; - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - ++port->icount.tx; - if (uart_circ_empty(xmit)) - break; - } while (!(UR (port, UART_R_STATUS) & nTxRdy) - && cbTxMax--); - - if (uart_circ_chars_pending (xmit) < WAKEUP_CHARS) - uart_write_wakeup (port); - - if (uart_circ_empty (xmit)) - lh7a40xuart_stop_tx (port); -} - -static void lh7a40xuart_modem_status (struct uart_port* port) -{ - unsigned int status = UR (port, UART_R_STATUS); - unsigned int delta - = status ^ ((struct uart_port_lh7a40x*) port)->statusPrev; - - BIT_SET (port, UART_R_RAWISR, MSEOI); /* Clear modem status intr */ - - if (!delta) /* Only happens if we missed 2 transitions */ - return; - - ((struct uart_port_lh7a40x*) port)->statusPrev = status; - - if (delta & DCD) - uart_handle_dcd_change (port, status & DCD); - - if (delta & DSR) - ++port->icount.dsr; - - if (delta & CTS) - uart_handle_cts_change (port, status & CTS); - - wake_up_interruptible (&port->state->port.delta_msr_wait); -} - -static irqreturn_t lh7a40xuart_int (int irq, void* dev_id) -{ - struct uart_port* port = dev_id; - unsigned int cLoopLimit = ISR_LOOP_LIMIT; - unsigned int isr = UR (port, UART_R_ISR); - - - do { - if (isr & (RxInt | RxTimeoutInt)) - lh7a40xuart_rx_chars(port); - if (isr & ModemInt) - lh7a40xuart_modem_status (port); - if (isr & TxInt) - lh7a40xuart_tx_chars (port); - - if (--cLoopLimit == 0) - break; - - isr = UR (port, UART_R_ISR); - } while (isr & (RxInt | TxInt | RxTimeoutInt)); - - return IRQ_HANDLED; -} - -static unsigned int lh7a40xuart_tx_empty (struct uart_port* port) -{ - return (UR (port, UART_R_STATUS) & TxEmpty) ? TIOCSER_TEMT : 0; -} - -static unsigned int lh7a40xuart_get_mctrl (struct uart_port* port) -{ - unsigned int result = 0; - unsigned int status = UR (port, UART_R_STATUS); - - if (status & DCD) - result |= TIOCM_CAR; - if (status & DSR) - result |= TIOCM_DSR; - if (status & CTS) - result |= TIOCM_CTS; - - return result; -} - -static void lh7a40xuart_set_mctrl (struct uart_port* port, unsigned int mctrl) -{ - /* None of the ports supports DTR. UART1 supports RTS through GPIO. */ - /* Note, kernel appears to be setting DTR and RTS on console. */ - - /* *** FIXME: this deserves more work. There's some work in - tracing all of the IO pins. */ -#if 0 - if( port->mapbase == UART1_PHYS) { - gpioRegs_t *gpio = (gpioRegs_t *)IO_ADDRESS(GPIO_PHYS); - - if (mctrl & TIOCM_RTS) - gpio->pbdr &= ~GPIOB_UART1_RTS; - else - gpio->pbdr |= GPIOB_UART1_RTS; - } -#endif -} - -static void lh7a40xuart_break_ctl (struct uart_port* port, int break_state) -{ - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - if (break_state == -1) - BIT_SET (port, UART_R_FCON, BRK); /* Assert break */ - else - BIT_CLR (port, UART_R_FCON, BRK); /* Deassert break */ - spin_unlock_irqrestore(&port->lock, flags); -} - -static int lh7a40xuart_startup (struct uart_port* port) -{ - int retval; - - retval = request_irq (port->irq, lh7a40xuart_int, 0, - "serial_lh7a40x", port); - if (retval) - return retval; - - /* Initial modem control-line settings */ - ((struct uart_port_lh7a40x*) port)->statusPrev - = UR (port, UART_R_STATUS); - - /* There is presently no configuration option to enable IR. - Thus, we always disable it. */ - - BIT_SET (port, UART_R_CON, UARTEN | SIRDIS); - BIT_SET (port, UART_R_INTEN, RxTimeoutInt | RxInt); - - return 0; -} - -static void lh7a40xuart_shutdown (struct uart_port* port) -{ - free_irq (port->irq, port); - BIT_CLR (port, UART_R_FCON, BRK | FEN); - BIT_CLR (port, UART_R_CON, UARTEN); -} - -static void lh7a40xuart_set_termios (struct uart_port* port, - struct ktermios* termios, - struct ktermios* old) -{ - unsigned int con; - unsigned int inten; - unsigned int fcon; - unsigned long flags; - unsigned int baud; - unsigned int quot; - - baud = uart_get_baud_rate (port, termios, old, 8, port->uartclk/16); - quot = uart_get_divisor (port, baud); /* -1 performed elsewhere */ - - switch (termios->c_cflag & CSIZE) { - case CS5: - fcon = WLEN_5; - break; - case CS6: - fcon = WLEN_6; - break; - case CS7: - fcon = WLEN_7; - break; - case CS8: - default: - fcon = WLEN_8; - break; - } - if (termios->c_cflag & CSTOPB) - fcon |= STP2; - if (termios->c_cflag & PARENB) { - fcon |= PEN; - if (!(termios->c_cflag & PARODD)) - fcon |= EPS; - } - if (port->fifosize > 1) - fcon |= FEN; - - spin_lock_irqsave (&port->lock, flags); - - uart_update_timeout (port, termios->c_cflag, baud); - - port->read_status_mask = RxOverrunError; - if (termios->c_iflag & INPCK) - port->read_status_mask |= RxFramingError | RxParityError; - if (termios->c_iflag & (BRKINT | PARMRK)) - port->read_status_mask |= RxBreak; - - /* Figure mask for status we ignore */ - port->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= RxFramingError | RxParityError; - if (termios->c_iflag & IGNBRK) { - port->ignore_status_mask |= RxBreak; - /* Ignore overrun when ignorning parity */ - /* *** FIXME: is this in the right place? */ - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= RxOverrunError; - } - - /* Ignore all receive errors when receive disabled */ - if ((termios->c_cflag & CREAD) == 0) - port->ignore_status_mask |= RxError; - - con = UR (port, UART_R_CON); - inten = (UR (port, UART_R_INTEN) & ~ModemInt); - - if (UART_ENABLE_MS (port, termios->c_cflag)) - inten |= ModemInt; - - BIT_CLR (port, UART_R_CON, UARTEN); /* Disable UART */ - UR (port, UART_R_INTEN) = 0; /* Disable interrupts */ - UR (port, UART_R_BRCON) = quot - 1; /* Set baud rate divisor */ - UR (port, UART_R_FCON) = fcon; /* Set FIFO and frame ctrl */ - UR (port, UART_R_INTEN) = inten; /* Enable interrupts */ - UR (port, UART_R_CON) = con; /* Restore UART mode */ - - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char* lh7a40xuart_type (struct uart_port* port) -{ - return port->type == PORT_LH7A40X ? "LH7A40X" : NULL; -} - -static void lh7a40xuart_release_port (struct uart_port* port) -{ - release_mem_region (port->mapbase, UART_REG_SIZE); -} - -static int lh7a40xuart_request_port (struct uart_port* port) -{ - return request_mem_region (port->mapbase, UART_REG_SIZE, - "serial_lh7a40x") != NULL - ? 0 : -EBUSY; -} - -static void lh7a40xuart_config_port (struct uart_port* port, int flags) -{ - if (flags & UART_CONFIG_TYPE) { - port->type = PORT_LH7A40X; - lh7a40xuart_request_port (port); - } -} - -static int lh7a40xuart_verify_port (struct uart_port* port, - struct serial_struct* ser) -{ - int ret = 0; - - if (ser->type != PORT_UNKNOWN && ser->type != PORT_LH7A40X) - ret = -EINVAL; - if (ser->irq < 0 || ser->irq >= nr_irqs) - ret = -EINVAL; - if (ser->baud_base < 9600) /* *** FIXME: is this true? */ - ret = -EINVAL; - return ret; -} - -static struct uart_ops lh7a40x_uart_ops = { - .tx_empty = lh7a40xuart_tx_empty, - .set_mctrl = lh7a40xuart_set_mctrl, - .get_mctrl = lh7a40xuart_get_mctrl, - .stop_tx = lh7a40xuart_stop_tx, - .start_tx = lh7a40xuart_start_tx, - .stop_rx = lh7a40xuart_stop_rx, - .enable_ms = lh7a40xuart_enable_ms, - .break_ctl = lh7a40xuart_break_ctl, - .startup = lh7a40xuart_startup, - .shutdown = lh7a40xuart_shutdown, - .set_termios = lh7a40xuart_set_termios, - .type = lh7a40xuart_type, - .release_port = lh7a40xuart_release_port, - .request_port = lh7a40xuart_request_port, - .config_port = lh7a40xuart_config_port, - .verify_port = lh7a40xuart_verify_port, -}; - -static struct uart_port_lh7a40x lh7a40x_ports[DEV_NR] = { - { - .port = { - .membase = (void*) io_p2v (UART1_PHYS), - .mapbase = UART1_PHYS, - .iotype = UPIO_MEM, - .irq = IRQ_UART1INTR, - .uartclk = 14745600/2, - .fifosize = 16, - .ops = &lh7a40x_uart_ops, - .flags = UPF_BOOT_AUTOCONF, - .line = 0, - }, - }, - { - .port = { - .membase = (void*) io_p2v (UART2_PHYS), - .mapbase = UART2_PHYS, - .iotype = UPIO_MEM, - .irq = IRQ_UART2INTR, - .uartclk = 14745600/2, - .fifosize = 16, - .ops = &lh7a40x_uart_ops, - .flags = UPF_BOOT_AUTOCONF, - .line = 1, - }, - }, - { - .port = { - .membase = (void*) io_p2v (UART3_PHYS), - .mapbase = UART3_PHYS, - .iotype = UPIO_MEM, - .irq = IRQ_UART3INTR, - .uartclk = 14745600/2, - .fifosize = 16, - .ops = &lh7a40x_uart_ops, - .flags = UPF_BOOT_AUTOCONF, - .line = 2, - }, - }, -}; - -#ifndef CONFIG_SERIAL_LH7A40X_CONSOLE -# define LH7A40X_CONSOLE NULL -#else -# define LH7A40X_CONSOLE &lh7a40x_console - -static void lh7a40xuart_console_putchar(struct uart_port *port, int ch) -{ - while (UR(port, UART_R_STATUS) & nTxRdy) - ; - UR(port, UART_R_DATA) = ch; -} - -static void lh7a40xuart_console_write (struct console* co, - const char* s, - unsigned int count) -{ - struct uart_port* port = &lh7a40x_ports[co->index].port; - unsigned int con = UR (port, UART_R_CON); - unsigned int inten = UR (port, UART_R_INTEN); - - - UR (port, UART_R_INTEN) = 0; /* Disable all interrupts */ - BIT_SET (port, UART_R_CON, UARTEN | SIRDIS); /* Enable UART */ - - uart_console_write(port, s, count, lh7a40xuart_console_putchar); - - /* Wait until all characters are sent */ - while (UR (port, UART_R_STATUS) & TxBusy) - ; - - /* Restore control and interrupt mask */ - UR (port, UART_R_CON) = con; - UR (port, UART_R_INTEN) = inten; -} - -static void __init lh7a40xuart_console_get_options (struct uart_port* port, - int* baud, - int* parity, - int* bits) -{ - if (UR (port, UART_R_CON) & UARTEN) { - unsigned int fcon = UR (port, UART_R_FCON); - unsigned int quot = UR (port, UART_R_BRCON) + 1; - - switch (fcon & (PEN | EPS)) { - default: *parity = 'n'; break; - case PEN: *parity = 'o'; break; - case PEN | EPS: *parity = 'e'; break; - } - - switch (fcon & WLEN) { - default: - case WLEN_8: *bits = 8; break; - case WLEN_7: *bits = 7; break; - case WLEN_6: *bits = 6; break; - case WLEN_5: *bits = 5; break; - } - - *baud = port->uartclk/(16*quot); - } -} - -static int __init lh7a40xuart_console_setup (struct console* co, char* options) -{ - struct uart_port* port; - int baud = 38400; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - if (co->index >= DEV_NR) /* Bounds check on device number */ - co->index = 0; - port = &lh7a40x_ports[co->index].port; - - if (options) - uart_parse_options (options, &baud, &parity, &bits, &flow); - else - lh7a40xuart_console_get_options (port, &baud, &parity, &bits); - - return uart_set_options (port, co, baud, parity, bits, flow); -} - -static struct uart_driver lh7a40x_reg; -static struct console lh7a40x_console = { - .name = "ttyAM", - .write = lh7a40xuart_console_write, - .device = uart_console_device, - .setup = lh7a40xuart_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &lh7a40x_reg, -}; - -static int __init lh7a40xuart_console_init(void) -{ - register_console (&lh7a40x_console); - return 0; -} - -console_initcall (lh7a40xuart_console_init); - -#endif - -static struct uart_driver lh7a40x_reg = { - .owner = THIS_MODULE, - .driver_name = "ttyAM", - .dev_name = "ttyAM", - .major = DEV_MAJOR, - .minor = DEV_MINOR, - .nr = DEV_NR, - .cons = LH7A40X_CONSOLE, -}; - -static int __init lh7a40xuart_init(void) -{ - int ret; - - printk (KERN_INFO "serial: LH7A40X serial driver\n"); - - ret = uart_register_driver (&lh7a40x_reg); - - if (ret == 0) { - int i; - - for (i = 0; i < DEV_NR; i++) { - /* UART3, when used, requires GPIO pin reallocation */ - if (lh7a40x_ports[i].port.mapbase == UART3_PHYS) - GPIO_PINMUX |= 1<<3; - uart_add_one_port (&lh7a40x_reg, - &lh7a40x_ports[i].port); - } - } - return ret; -} - -static void __exit lh7a40xuart_exit(void) -{ - int i; - - for (i = 0; i < DEV_NR; i++) - uart_remove_one_port (&lh7a40x_reg, &lh7a40x_ports[i].port); - - uart_unregister_driver (&lh7a40x_reg); -} - -module_init (lh7a40xuart_init); -module_exit (lh7a40xuart_exit); - -MODULE_AUTHOR ("Marc Singer"); -MODULE_DESCRIPTION ("Sharp LH7A40X serial port driver"); -MODULE_LICENSE ("GPL"); diff --git a/drivers/serial/serial_txx9.c b/drivers/serial/serial_txx9.c deleted file mode 100644 index c50e9fbbf743..000000000000 --- a/drivers/serial/serial_txx9.c +++ /dev/null @@ -1,1344 +0,0 @@ -/* - * drivers/serial/serial_txx9.c - * - * Derived from many drivers using generic_serial interface, - * especially serial_tx3912.c by Steven J. Hill and r39xx_serial.c - * (was in Linux/VR tree) by Jim Pick. - * - * Copyright (C) 1999 Harald Koerfgen - * Copyright (C) 2000 Jim Pick <jim@jimpick.com> - * Copyright (C) 2001 Steven J. Hill (sjhill@realitydiluted.com) - * Copyright (C) 2000-2002 Toshiba Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * Serial driver for TX3927/TX4927/TX4925/TX4938 internal SIO controller - */ - -#if defined(CONFIG_SERIAL_TXX9_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/module.h> -#include <linux/ioport.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/delay.h> -#include <linux/platform_device.h> -#include <linux/pci.h> -#include <linux/serial_core.h> -#include <linux/serial.h> - -#include <asm/io.h> - -static char *serial_version = "1.11"; -static char *serial_name = "TX39/49 Serial driver"; - -#define PASS_LIMIT 256 - -#if !defined(CONFIG_SERIAL_TXX9_STDSERIAL) -/* "ttyS" is used for standard serial driver */ -#define TXX9_TTY_NAME "ttyTX" -#define TXX9_TTY_MINOR_START 196 -#define TXX9_TTY_MAJOR 204 -#else -/* acts like standard serial driver */ -#define TXX9_TTY_NAME "ttyS" -#define TXX9_TTY_MINOR_START 64 -#define TXX9_TTY_MAJOR TTY_MAJOR -#endif - -/* flag aliases */ -#define UPF_TXX9_HAVE_CTS_LINE UPF_BUGGY_UART -#define UPF_TXX9_USE_SCLK UPF_MAGIC_MULTIPLIER - -#ifdef CONFIG_PCI -/* support for Toshiba TC86C001 SIO */ -#define ENABLE_SERIAL_TXX9_PCI -#endif - -/* - * Number of serial ports - */ -#define UART_NR CONFIG_SERIAL_TXX9_NR_UARTS - -struct uart_txx9_port { - struct uart_port port; - /* No additional info for now */ -}; - -#define TXX9_REGION_SIZE 0x24 - -/* TXX9 Serial Registers */ -#define TXX9_SILCR 0x00 -#define TXX9_SIDICR 0x04 -#define TXX9_SIDISR 0x08 -#define TXX9_SICISR 0x0c -#define TXX9_SIFCR 0x10 -#define TXX9_SIFLCR 0x14 -#define TXX9_SIBGR 0x18 -#define TXX9_SITFIFO 0x1c -#define TXX9_SIRFIFO 0x20 - -/* SILCR : Line Control */ -#define TXX9_SILCR_SCS_MASK 0x00000060 -#define TXX9_SILCR_SCS_IMCLK 0x00000000 -#define TXX9_SILCR_SCS_IMCLK_BG 0x00000020 -#define TXX9_SILCR_SCS_SCLK 0x00000040 -#define TXX9_SILCR_SCS_SCLK_BG 0x00000060 -#define TXX9_SILCR_UEPS 0x00000010 -#define TXX9_SILCR_UPEN 0x00000008 -#define TXX9_SILCR_USBL_MASK 0x00000004 -#define TXX9_SILCR_USBL_1BIT 0x00000000 -#define TXX9_SILCR_USBL_2BIT 0x00000004 -#define TXX9_SILCR_UMODE_MASK 0x00000003 -#define TXX9_SILCR_UMODE_8BIT 0x00000000 -#define TXX9_SILCR_UMODE_7BIT 0x00000001 - -/* SIDICR : DMA/Int. Control */ -#define TXX9_SIDICR_TDE 0x00008000 -#define TXX9_SIDICR_RDE 0x00004000 -#define TXX9_SIDICR_TIE 0x00002000 -#define TXX9_SIDICR_RIE 0x00001000 -#define TXX9_SIDICR_SPIE 0x00000800 -#define TXX9_SIDICR_CTSAC 0x00000600 -#define TXX9_SIDICR_STIE_MASK 0x0000003f -#define TXX9_SIDICR_STIE_OERS 0x00000020 -#define TXX9_SIDICR_STIE_CTSS 0x00000010 -#define TXX9_SIDICR_STIE_RBRKD 0x00000008 -#define TXX9_SIDICR_STIE_TRDY 0x00000004 -#define TXX9_SIDICR_STIE_TXALS 0x00000002 -#define TXX9_SIDICR_STIE_UBRKD 0x00000001 - -/* SIDISR : DMA/Int. Status */ -#define TXX9_SIDISR_UBRK 0x00008000 -#define TXX9_SIDISR_UVALID 0x00004000 -#define TXX9_SIDISR_UFER 0x00002000 -#define TXX9_SIDISR_UPER 0x00001000 -#define TXX9_SIDISR_UOER 0x00000800 -#define TXX9_SIDISR_ERI 0x00000400 -#define TXX9_SIDISR_TOUT 0x00000200 -#define TXX9_SIDISR_TDIS 0x00000100 -#define TXX9_SIDISR_RDIS 0x00000080 -#define TXX9_SIDISR_STIS 0x00000040 -#define TXX9_SIDISR_RFDN_MASK 0x0000001f - -/* SICISR : Change Int. Status */ -#define TXX9_SICISR_OERS 0x00000020 -#define TXX9_SICISR_CTSS 0x00000010 -#define TXX9_SICISR_RBRKD 0x00000008 -#define TXX9_SICISR_TRDY 0x00000004 -#define TXX9_SICISR_TXALS 0x00000002 -#define TXX9_SICISR_UBRKD 0x00000001 - -/* SIFCR : FIFO Control */ -#define TXX9_SIFCR_SWRST 0x00008000 -#define TXX9_SIFCR_RDIL_MASK 0x00000180 -#define TXX9_SIFCR_RDIL_1 0x00000000 -#define TXX9_SIFCR_RDIL_4 0x00000080 -#define TXX9_SIFCR_RDIL_8 0x00000100 -#define TXX9_SIFCR_RDIL_12 0x00000180 -#define TXX9_SIFCR_RDIL_MAX 0x00000180 -#define TXX9_SIFCR_TDIL_MASK 0x00000018 -#define TXX9_SIFCR_TDIL_MASK 0x00000018 -#define TXX9_SIFCR_TDIL_1 0x00000000 -#define TXX9_SIFCR_TDIL_4 0x00000001 -#define TXX9_SIFCR_TDIL_8 0x00000010 -#define TXX9_SIFCR_TDIL_MAX 0x00000010 -#define TXX9_SIFCR_TFRST 0x00000004 -#define TXX9_SIFCR_RFRST 0x00000002 -#define TXX9_SIFCR_FRSTE 0x00000001 -#define TXX9_SIO_TX_FIFO 8 -#define TXX9_SIO_RX_FIFO 16 - -/* SIFLCR : Flow Control */ -#define TXX9_SIFLCR_RCS 0x00001000 -#define TXX9_SIFLCR_TES 0x00000800 -#define TXX9_SIFLCR_RTSSC 0x00000200 -#define TXX9_SIFLCR_RSDE 0x00000100 -#define TXX9_SIFLCR_TSDE 0x00000080 -#define TXX9_SIFLCR_RTSTL_MASK 0x0000001e -#define TXX9_SIFLCR_RTSTL_MAX 0x0000001e -#define TXX9_SIFLCR_TBRK 0x00000001 - -/* SIBGR : Baudrate Control */ -#define TXX9_SIBGR_BCLK_MASK 0x00000300 -#define TXX9_SIBGR_BCLK_T0 0x00000000 -#define TXX9_SIBGR_BCLK_T2 0x00000100 -#define TXX9_SIBGR_BCLK_T4 0x00000200 -#define TXX9_SIBGR_BCLK_T6 0x00000300 -#define TXX9_SIBGR_BRD_MASK 0x000000ff - -static inline unsigned int sio_in(struct uart_txx9_port *up, int offset) -{ - switch (up->port.iotype) { - default: - return __raw_readl(up->port.membase + offset); - case UPIO_PORT: - return inl(up->port.iobase + offset); - } -} - -static inline void -sio_out(struct uart_txx9_port *up, int offset, int value) -{ - switch (up->port.iotype) { - default: - __raw_writel(value, up->port.membase + offset); - break; - case UPIO_PORT: - outl(value, up->port.iobase + offset); - break; - } -} - -static inline void -sio_mask(struct uart_txx9_port *up, int offset, unsigned int value) -{ - sio_out(up, offset, sio_in(up, offset) & ~value); -} -static inline void -sio_set(struct uart_txx9_port *up, int offset, unsigned int value) -{ - sio_out(up, offset, sio_in(up, offset) | value); -} - -static inline void -sio_quot_set(struct uart_txx9_port *up, int quot) -{ - quot >>= 1; - if (quot < 256) - sio_out(up, TXX9_SIBGR, quot | TXX9_SIBGR_BCLK_T0); - else if (quot < (256 << 2)) - sio_out(up, TXX9_SIBGR, (quot >> 2) | TXX9_SIBGR_BCLK_T2); - else if (quot < (256 << 4)) - sio_out(up, TXX9_SIBGR, (quot >> 4) | TXX9_SIBGR_BCLK_T4); - else if (quot < (256 << 6)) - sio_out(up, TXX9_SIBGR, (quot >> 6) | TXX9_SIBGR_BCLK_T6); - else - sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6); -} - -static struct uart_txx9_port *to_uart_txx9_port(struct uart_port *port) -{ - return container_of(port, struct uart_txx9_port, port); -} - -static void serial_txx9_stop_tx(struct uart_port *port) -{ - struct uart_txx9_port *up = to_uart_txx9_port(port); - sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_TIE); -} - -static void serial_txx9_start_tx(struct uart_port *port) -{ - struct uart_txx9_port *up = to_uart_txx9_port(port); - sio_set(up, TXX9_SIDICR, TXX9_SIDICR_TIE); -} - -static void serial_txx9_stop_rx(struct uart_port *port) -{ - struct uart_txx9_port *up = to_uart_txx9_port(port); - up->port.read_status_mask &= ~TXX9_SIDISR_RDIS; -} - -static void serial_txx9_enable_ms(struct uart_port *port) -{ - /* TXX9-SIO can not control DTR... */ -} - -static void serial_txx9_initialize(struct uart_port *port) -{ - struct uart_txx9_port *up = to_uart_txx9_port(port); - unsigned int tmout = 10000; - - sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST); - /* TX4925 BUG WORKAROUND. Accessing SIOC register - * immediately after soft reset causes bus error. */ - mmiowb(); - udelay(1); - while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout) - udelay(1); - /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */ - sio_set(up, TXX9_SIFCR, - TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1); - /* initial settings */ - sio_out(up, TXX9_SILCR, - TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT | - ((up->port.flags & UPF_TXX9_USE_SCLK) ? - TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG)); - sio_quot_set(up, uart_get_divisor(port, 9600)); - sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */); - sio_out(up, TXX9_SIDICR, 0); -} - -static inline void -receive_chars(struct uart_txx9_port *up, unsigned int *status) -{ - struct tty_struct *tty = up->port.state->port.tty; - unsigned char ch; - unsigned int disr = *status; - int max_count = 256; - char flag; - unsigned int next_ignore_status_mask; - - do { - ch = sio_in(up, TXX9_SIRFIFO); - flag = TTY_NORMAL; - up->port.icount.rx++; - - /* mask out RFDN_MASK bit added by previous overrun */ - next_ignore_status_mask = - up->port.ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK; - if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER | - TXX9_SIDISR_UFER | TXX9_SIDISR_UOER))) { - /* - * For statistics only - */ - if (disr & TXX9_SIDISR_UBRK) { - disr &= ~(TXX9_SIDISR_UFER | TXX9_SIDISR_UPER); - up->port.icount.brk++; - /* - * We do the SysRQ and SAK checking - * here because otherwise the break - * may get masked by ignore_status_mask - * or read_status_mask. - */ - if (uart_handle_break(&up->port)) - goto ignore_char; - } else if (disr & TXX9_SIDISR_UPER) - up->port.icount.parity++; - else if (disr & TXX9_SIDISR_UFER) - up->port.icount.frame++; - if (disr & TXX9_SIDISR_UOER) { - up->port.icount.overrun++; - /* - * The receiver read buffer still hold - * a char which caused overrun. - * Ignore next char by adding RFDN_MASK - * to ignore_status_mask temporarily. - */ - next_ignore_status_mask |= - TXX9_SIDISR_RFDN_MASK; - } - - /* - * Mask off conditions which should be ingored. - */ - disr &= up->port.read_status_mask; - - if (disr & TXX9_SIDISR_UBRK) { - flag = TTY_BREAK; - } else if (disr & TXX9_SIDISR_UPER) - flag = TTY_PARITY; - else if (disr & TXX9_SIDISR_UFER) - flag = TTY_FRAME; - } - if (uart_handle_sysrq_char(&up->port, ch)) - goto ignore_char; - - uart_insert_char(&up->port, disr, TXX9_SIDISR_UOER, ch, flag); - - ignore_char: - up->port.ignore_status_mask = next_ignore_status_mask; - disr = sio_in(up, TXX9_SIDISR); - } while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0)); - spin_unlock(&up->port.lock); - tty_flip_buffer_push(tty); - spin_lock(&up->port.lock); - *status = disr; -} - -static inline void transmit_chars(struct uart_txx9_port *up) -{ - struct circ_buf *xmit = &up->port.state->xmit; - int count; - - if (up->port.x_char) { - sio_out(up, TXX9_SITFIFO, up->port.x_char); - up->port.icount.tx++; - up->port.x_char = 0; - return; - } - if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) { - serial_txx9_stop_tx(&up->port); - return; - } - - count = TXX9_SIO_TX_FIFO; - do { - sio_out(up, TXX9_SITFIFO, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - up->port.icount.tx++; - if (uart_circ_empty(xmit)) - break; - } while (--count > 0); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&up->port); - - if (uart_circ_empty(xmit)) - serial_txx9_stop_tx(&up->port); -} - -static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id) -{ - int pass_counter = 0; - struct uart_txx9_port *up = dev_id; - unsigned int status; - - while (1) { - spin_lock(&up->port.lock); - status = sio_in(up, TXX9_SIDISR); - if (!(sio_in(up, TXX9_SIDICR) & TXX9_SIDICR_TIE)) - status &= ~TXX9_SIDISR_TDIS; - if (!(status & (TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS | - TXX9_SIDISR_TOUT))) { - spin_unlock(&up->port.lock); - break; - } - - if (status & TXX9_SIDISR_RDIS) - receive_chars(up, &status); - if (status & TXX9_SIDISR_TDIS) - transmit_chars(up); - /* Clear TX/RX Int. Status */ - sio_mask(up, TXX9_SIDISR, - TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS | - TXX9_SIDISR_TOUT); - spin_unlock(&up->port.lock); - - if (pass_counter++ > PASS_LIMIT) - break; - } - - return pass_counter ? IRQ_HANDLED : IRQ_NONE; -} - -static unsigned int serial_txx9_tx_empty(struct uart_port *port) -{ - struct uart_txx9_port *up = to_uart_txx9_port(port); - unsigned long flags; - unsigned int ret; - - spin_lock_irqsave(&up->port.lock, flags); - ret = (sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS) ? TIOCSER_TEMT : 0; - spin_unlock_irqrestore(&up->port.lock, flags); - - return ret; -} - -static unsigned int serial_txx9_get_mctrl(struct uart_port *port) -{ - struct uart_txx9_port *up = to_uart_txx9_port(port); - unsigned int ret; - - /* no modem control lines */ - ret = TIOCM_CAR | TIOCM_DSR; - ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS; - ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS; - - return ret; -} - -static void serial_txx9_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct uart_txx9_port *up = to_uart_txx9_port(port); - - if (mctrl & TIOCM_RTS) - sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC); - else - sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC); -} - -static void serial_txx9_break_ctl(struct uart_port *port, int break_state) -{ - struct uart_txx9_port *up = to_uart_txx9_port(port); - unsigned long flags; - - spin_lock_irqsave(&up->port.lock, flags); - if (break_state == -1) - sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK); - else - sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK); - spin_unlock_irqrestore(&up->port.lock, flags); -} - -#if defined(CONFIG_SERIAL_TXX9_CONSOLE) || (CONFIG_CONSOLE_POLL) -/* - * Wait for transmitter & holding register to empty - */ -static void wait_for_xmitr(struct uart_txx9_port *up) -{ - unsigned int tmout = 10000; - - /* Wait up to 10ms for the character(s) to be sent. */ - while (--tmout && - !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS)) - udelay(1); - - /* Wait up to 1s for flow control if necessary */ - if (up->port.flags & UPF_CONS_FLOW) { - tmout = 1000000; - while (--tmout && - (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS)) - udelay(1); - } -} -#endif - -#ifdef CONFIG_CONSOLE_POLL -/* - * Console polling routines for writing and reading from the uart while - * in an interrupt or debug context. - */ - -static int serial_txx9_get_poll_char(struct uart_port *port) -{ - unsigned int ier; - unsigned char c; - struct uart_txx9_port *up = to_uart_txx9_port(port); - - /* - * First save the IER then disable the interrupts - */ - ier = sio_in(up, TXX9_SIDICR); - sio_out(up, TXX9_SIDICR, 0); - - while (sio_in(up, TXX9_SIDISR) & TXX9_SIDISR_UVALID) - ; - - c = sio_in(up, TXX9_SIRFIFO); - - /* - * Finally, clear RX interrupt status - * and restore the IER - */ - sio_mask(up, TXX9_SIDISR, TXX9_SIDISR_RDIS); - sio_out(up, TXX9_SIDICR, ier); - return c; -} - - -static void serial_txx9_put_poll_char(struct uart_port *port, unsigned char c) -{ - unsigned int ier; - struct uart_txx9_port *up = to_uart_txx9_port(port); - - /* - * First save the IER then disable the interrupts - */ - ier = sio_in(up, TXX9_SIDICR); - sio_out(up, TXX9_SIDICR, 0); - - wait_for_xmitr(up); - /* - * Send the character out. - * If a LF, also do CR... - */ - sio_out(up, TXX9_SITFIFO, c); - if (c == 10) { - wait_for_xmitr(up); - sio_out(up, TXX9_SITFIFO, 13); - } - - /* - * Finally, wait for transmitter to become empty - * and restore the IER - */ - wait_for_xmitr(up); - sio_out(up, TXX9_SIDICR, ier); -} - -#endif /* CONFIG_CONSOLE_POLL */ - -static int serial_txx9_startup(struct uart_port *port) -{ - struct uart_txx9_port *up = to_uart_txx9_port(port); - unsigned long flags; - int retval; - - /* - * Clear the FIFO buffers and disable them. - * (they will be reenabled in set_termios()) - */ - sio_set(up, TXX9_SIFCR, - TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); - /* clear reset */ - sio_mask(up, TXX9_SIFCR, - TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); - sio_out(up, TXX9_SIDICR, 0); - - /* - * Clear the interrupt registers. - */ - sio_out(up, TXX9_SIDISR, 0); - - retval = request_irq(up->port.irq, serial_txx9_interrupt, - IRQF_SHARED, "serial_txx9", up); - if (retval) - return retval; - - /* - * Now, initialize the UART - */ - spin_lock_irqsave(&up->port.lock, flags); - serial_txx9_set_mctrl(&up->port, up->port.mctrl); - spin_unlock_irqrestore(&up->port.lock, flags); - - /* Enable RX/TX */ - sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE); - - /* - * Finally, enable interrupts. - */ - sio_set(up, TXX9_SIDICR, TXX9_SIDICR_RIE); - - return 0; -} - -static void serial_txx9_shutdown(struct uart_port *port) -{ - struct uart_txx9_port *up = to_uart_txx9_port(port); - unsigned long flags; - - /* - * Disable interrupts from this port - */ - sio_out(up, TXX9_SIDICR, 0); /* disable all intrs */ - - spin_lock_irqsave(&up->port.lock, flags); - serial_txx9_set_mctrl(&up->port, up->port.mctrl); - spin_unlock_irqrestore(&up->port.lock, flags); - - /* - * Disable break condition - */ - sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK); - -#ifdef CONFIG_SERIAL_TXX9_CONSOLE - if (up->port.cons && up->port.line == up->port.cons->index) { - free_irq(up->port.irq, up); - return; - } -#endif - /* reset FIFOs */ - sio_set(up, TXX9_SIFCR, - TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); - /* clear reset */ - sio_mask(up, TXX9_SIFCR, - TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); - - /* Disable RX/TX */ - sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE); - - free_irq(up->port.irq, up); -} - -static void -serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct uart_txx9_port *up = to_uart_txx9_port(port); - unsigned int cval, fcr = 0; - unsigned long flags; - unsigned int baud, quot; - - /* - * We don't support modem control lines. - */ - termios->c_cflag &= ~(HUPCL | CMSPAR); - termios->c_cflag |= CLOCAL; - - cval = sio_in(up, TXX9_SILCR); - /* byte size and parity */ - cval &= ~TXX9_SILCR_UMODE_MASK; - switch (termios->c_cflag & CSIZE) { - case CS7: - cval |= TXX9_SILCR_UMODE_7BIT; - break; - default: - case CS5: /* not supported */ - case CS6: /* not supported */ - case CS8: - cval |= TXX9_SILCR_UMODE_8BIT; - break; - } - - cval &= ~TXX9_SILCR_USBL_MASK; - if (termios->c_cflag & CSTOPB) - cval |= TXX9_SILCR_USBL_2BIT; - else - cval |= TXX9_SILCR_USBL_1BIT; - cval &= ~(TXX9_SILCR_UPEN | TXX9_SILCR_UEPS); - if (termios->c_cflag & PARENB) - cval |= TXX9_SILCR_UPEN; - if (!(termios->c_cflag & PARODD)) - cval |= TXX9_SILCR_UEPS; - - /* - * Ask the core to calculate the divisor for us. - */ - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16/2); - quot = uart_get_divisor(port, baud); - - /* Set up FIFOs */ - /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */ - fcr = TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1; - - /* - * Ok, we're now changing the port state. Do it with - * interrupts disabled. - */ - spin_lock_irqsave(&up->port.lock, flags); - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, termios->c_cflag, baud); - - up->port.read_status_mask = TXX9_SIDISR_UOER | - TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS; - if (termios->c_iflag & INPCK) - up->port.read_status_mask |= TXX9_SIDISR_UFER | TXX9_SIDISR_UPER; - if (termios->c_iflag & (BRKINT | PARMRK)) - up->port.read_status_mask |= TXX9_SIDISR_UBRK; - - /* - * Characteres to ignore - */ - up->port.ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - up->port.ignore_status_mask |= TXX9_SIDISR_UPER | TXX9_SIDISR_UFER; - if (termios->c_iflag & IGNBRK) { - up->port.ignore_status_mask |= TXX9_SIDISR_UBRK; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (termios->c_iflag & IGNPAR) - up->port.ignore_status_mask |= TXX9_SIDISR_UOER; - } - - /* - * ignore all characters if CREAD is not set - */ - if ((termios->c_cflag & CREAD) == 0) - up->port.ignore_status_mask |= TXX9_SIDISR_RDIS; - - /* CTS flow control flag */ - if ((termios->c_cflag & CRTSCTS) && - (up->port.flags & UPF_TXX9_HAVE_CTS_LINE)) { - sio_set(up, TXX9_SIFLCR, - TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES); - } else { - sio_mask(up, TXX9_SIFLCR, - TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES); - } - - sio_out(up, TXX9_SILCR, cval); - sio_quot_set(up, quot); - sio_out(up, TXX9_SIFCR, fcr); - - serial_txx9_set_mctrl(&up->port, up->port.mctrl); - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static void -serial_txx9_pm(struct uart_port *port, unsigned int state, - unsigned int oldstate) -{ - /* - * If oldstate was -1 this is called from - * uart_configure_port(). In this case do not initialize the - * port now, because the port was already initialized (for - * non-console port) or should not be initialized here (for - * console port). If we initialized the port here we lose - * serial console settings. - */ - if (state == 0 && oldstate != -1) - serial_txx9_initialize(port); -} - -static int serial_txx9_request_resource(struct uart_txx9_port *up) -{ - unsigned int size = TXX9_REGION_SIZE; - int ret = 0; - - switch (up->port.iotype) { - default: - if (!up->port.mapbase) - break; - - if (!request_mem_region(up->port.mapbase, size, "serial_txx9")) { - ret = -EBUSY; - break; - } - - if (up->port.flags & UPF_IOREMAP) { - up->port.membase = ioremap(up->port.mapbase, size); - if (!up->port.membase) { - release_mem_region(up->port.mapbase, size); - ret = -ENOMEM; - } - } - break; - - case UPIO_PORT: - if (!request_region(up->port.iobase, size, "serial_txx9")) - ret = -EBUSY; - break; - } - return ret; -} - -static void serial_txx9_release_resource(struct uart_txx9_port *up) -{ - unsigned int size = TXX9_REGION_SIZE; - - switch (up->port.iotype) { - default: - if (!up->port.mapbase) - break; - - if (up->port.flags & UPF_IOREMAP) { - iounmap(up->port.membase); - up->port.membase = NULL; - } - - release_mem_region(up->port.mapbase, size); - break; - - case UPIO_PORT: - release_region(up->port.iobase, size); - break; - } -} - -static void serial_txx9_release_port(struct uart_port *port) -{ - struct uart_txx9_port *up = to_uart_txx9_port(port); - serial_txx9_release_resource(up); -} - -static int serial_txx9_request_port(struct uart_port *port) -{ - struct uart_txx9_port *up = to_uart_txx9_port(port); - return serial_txx9_request_resource(up); -} - -static void serial_txx9_config_port(struct uart_port *port, int uflags) -{ - struct uart_txx9_port *up = to_uart_txx9_port(port); - int ret; - - /* - * Find the region that we can probe for. This in turn - * tells us whether we can probe for the type of port. - */ - ret = serial_txx9_request_resource(up); - if (ret < 0) - return; - port->type = PORT_TXX9; - up->port.fifosize = TXX9_SIO_TX_FIFO; - -#ifdef CONFIG_SERIAL_TXX9_CONSOLE - if (up->port.line == up->port.cons->index) - return; -#endif - serial_txx9_initialize(port); -} - -static const char * -serial_txx9_type(struct uart_port *port) -{ - return "txx9"; -} - -static struct uart_ops serial_txx9_pops = { - .tx_empty = serial_txx9_tx_empty, - .set_mctrl = serial_txx9_set_mctrl, - .get_mctrl = serial_txx9_get_mctrl, - .stop_tx = serial_txx9_stop_tx, - .start_tx = serial_txx9_start_tx, - .stop_rx = serial_txx9_stop_rx, - .enable_ms = serial_txx9_enable_ms, - .break_ctl = serial_txx9_break_ctl, - .startup = serial_txx9_startup, - .shutdown = serial_txx9_shutdown, - .set_termios = serial_txx9_set_termios, - .pm = serial_txx9_pm, - .type = serial_txx9_type, - .release_port = serial_txx9_release_port, - .request_port = serial_txx9_request_port, - .config_port = serial_txx9_config_port, -#ifdef CONFIG_CONSOLE_POLL - .poll_get_char = serial_txx9_get_poll_char, - .poll_put_char = serial_txx9_put_poll_char, -#endif -}; - -static struct uart_txx9_port serial_txx9_ports[UART_NR]; - -static void __init serial_txx9_register_ports(struct uart_driver *drv, - struct device *dev) -{ - int i; - - for (i = 0; i < UART_NR; i++) { - struct uart_txx9_port *up = &serial_txx9_ports[i]; - - up->port.line = i; - up->port.ops = &serial_txx9_pops; - up->port.dev = dev; - if (up->port.iobase || up->port.mapbase) - uart_add_one_port(drv, &up->port); - } -} - -#ifdef CONFIG_SERIAL_TXX9_CONSOLE - -static void serial_txx9_console_putchar(struct uart_port *port, int ch) -{ - struct uart_txx9_port *up = to_uart_txx9_port(port); - - wait_for_xmitr(up); - sio_out(up, TXX9_SITFIFO, ch); -} - -/* - * Print a string to the serial port trying not to disturb - * any possible real use of the port... - * - * The console_lock must be held when we get here. - */ -static void -serial_txx9_console_write(struct console *co, const char *s, unsigned int count) -{ - struct uart_txx9_port *up = &serial_txx9_ports[co->index]; - unsigned int ier, flcr; - - /* - * First save the UER then disable the interrupts - */ - ier = sio_in(up, TXX9_SIDICR); - sio_out(up, TXX9_SIDICR, 0); - /* - * Disable flow-control if enabled (and unnecessary) - */ - flcr = sio_in(up, TXX9_SIFLCR); - if (!(up->port.flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES)) - sio_out(up, TXX9_SIFLCR, flcr & ~TXX9_SIFLCR_TES); - - uart_console_write(&up->port, s, count, serial_txx9_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore the IER - */ - wait_for_xmitr(up); - sio_out(up, TXX9_SIFLCR, flcr); - sio_out(up, TXX9_SIDICR, ier); -} - -static int __init serial_txx9_console_setup(struct console *co, char *options) -{ - struct uart_port *port; - struct uart_txx9_port *up; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - if (co->index >= UART_NR) - co->index = 0; - up = &serial_txx9_ports[co->index]; - port = &up->port; - if (!port->ops) - return -ENODEV; - - serial_txx9_initialize(&up->port); - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - -static struct uart_driver serial_txx9_reg; -static struct console serial_txx9_console = { - .name = TXX9_TTY_NAME, - .write = serial_txx9_console_write, - .device = uart_console_device, - .setup = serial_txx9_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &serial_txx9_reg, -}; - -static int __init serial_txx9_console_init(void) -{ - register_console(&serial_txx9_console); - return 0; -} -console_initcall(serial_txx9_console_init); - -#define SERIAL_TXX9_CONSOLE &serial_txx9_console -#else -#define SERIAL_TXX9_CONSOLE NULL -#endif - -static struct uart_driver serial_txx9_reg = { - .owner = THIS_MODULE, - .driver_name = "serial_txx9", - .dev_name = TXX9_TTY_NAME, - .major = TXX9_TTY_MAJOR, - .minor = TXX9_TTY_MINOR_START, - .nr = UART_NR, - .cons = SERIAL_TXX9_CONSOLE, -}; - -int __init early_serial_txx9_setup(struct uart_port *port) -{ - if (port->line >= ARRAY_SIZE(serial_txx9_ports)) - return -ENODEV; - - serial_txx9_ports[port->line].port = *port; - serial_txx9_ports[port->line].port.ops = &serial_txx9_pops; - serial_txx9_ports[port->line].port.flags |= - UPF_BOOT_AUTOCONF | UPF_FIXED_PORT; - return 0; -} - -static DEFINE_MUTEX(serial_txx9_mutex); - -/** - * serial_txx9_register_port - register a serial port - * @port: serial port template - * - * Configure the serial port specified by the request. - * - * The port is then probed and if necessary the IRQ is autodetected - * If this fails an error is returned. - * - * On success the port is ready to use and the line number is returned. - */ -static int __devinit serial_txx9_register_port(struct uart_port *port) -{ - int i; - struct uart_txx9_port *uart; - int ret = -ENOSPC; - - mutex_lock(&serial_txx9_mutex); - for (i = 0; i < UART_NR; i++) { - uart = &serial_txx9_ports[i]; - if (uart_match_port(&uart->port, port)) { - uart_remove_one_port(&serial_txx9_reg, &uart->port); - break; - } - } - if (i == UART_NR) { - /* Find unused port */ - for (i = 0; i < UART_NR; i++) { - uart = &serial_txx9_ports[i]; - if (!(uart->port.iobase || uart->port.mapbase)) - break; - } - } - if (i < UART_NR) { - uart->port.iobase = port->iobase; - uart->port.membase = port->membase; - uart->port.irq = port->irq; - uart->port.uartclk = port->uartclk; - uart->port.iotype = port->iotype; - uart->port.flags = port->flags - | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT; - uart->port.mapbase = port->mapbase; - if (port->dev) - uart->port.dev = port->dev; - ret = uart_add_one_port(&serial_txx9_reg, &uart->port); - if (ret == 0) - ret = uart->port.line; - } - mutex_unlock(&serial_txx9_mutex); - return ret; -} - -/** - * serial_txx9_unregister_port - remove a txx9 serial port at runtime - * @line: serial line number - * - * Remove one serial port. This may not be called from interrupt - * context. We hand the port back to the our control. - */ -static void __devexit serial_txx9_unregister_port(int line) -{ - struct uart_txx9_port *uart = &serial_txx9_ports[line]; - - mutex_lock(&serial_txx9_mutex); - uart_remove_one_port(&serial_txx9_reg, &uart->port); - uart->port.flags = 0; - uart->port.type = PORT_UNKNOWN; - uart->port.iobase = 0; - uart->port.mapbase = 0; - uart->port.membase = NULL; - uart->port.dev = NULL; - mutex_unlock(&serial_txx9_mutex); -} - -/* - * Register a set of serial devices attached to a platform device. - */ -static int __devinit serial_txx9_probe(struct platform_device *dev) -{ - struct uart_port *p = dev->dev.platform_data; - struct uart_port port; - int ret, i; - - memset(&port, 0, sizeof(struct uart_port)); - for (i = 0; p && p->uartclk != 0; p++, i++) { - port.iobase = p->iobase; - port.membase = p->membase; - port.irq = p->irq; - port.uartclk = p->uartclk; - port.iotype = p->iotype; - port.flags = p->flags; - port.mapbase = p->mapbase; - port.dev = &dev->dev; - ret = serial_txx9_register_port(&port); - if (ret < 0) { - dev_err(&dev->dev, "unable to register port at index %d " - "(IO%lx MEM%llx IRQ%d): %d\n", i, - p->iobase, (unsigned long long)p->mapbase, - p->irq, ret); - } - } - return 0; -} - -/* - * Remove serial ports registered against a platform device. - */ -static int __devexit serial_txx9_remove(struct platform_device *dev) -{ - int i; - - for (i = 0; i < UART_NR; i++) { - struct uart_txx9_port *up = &serial_txx9_ports[i]; - - if (up->port.dev == &dev->dev) - serial_txx9_unregister_port(i); - } - return 0; -} - -#ifdef CONFIG_PM -static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state) -{ - int i; - - for (i = 0; i < UART_NR; i++) { - struct uart_txx9_port *up = &serial_txx9_ports[i]; - - if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev) - uart_suspend_port(&serial_txx9_reg, &up->port); - } - - return 0; -} - -static int serial_txx9_resume(struct platform_device *dev) -{ - int i; - - for (i = 0; i < UART_NR; i++) { - struct uart_txx9_port *up = &serial_txx9_ports[i]; - - if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev) - uart_resume_port(&serial_txx9_reg, &up->port); - } - - return 0; -} -#endif - -static struct platform_driver serial_txx9_plat_driver = { - .probe = serial_txx9_probe, - .remove = __devexit_p(serial_txx9_remove), -#ifdef CONFIG_PM - .suspend = serial_txx9_suspend, - .resume = serial_txx9_resume, -#endif - .driver = { - .name = "serial_txx9", - .owner = THIS_MODULE, - }, -}; - -#ifdef ENABLE_SERIAL_TXX9_PCI -/* - * Probe one serial board. Unfortunately, there is no rhyme nor reason - * to the arrangement of serial ports on a PCI card. - */ -static int __devinit -pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent) -{ - struct uart_port port; - int line; - int rc; - - rc = pci_enable_device(dev); - if (rc) - return rc; - - memset(&port, 0, sizeof(port)); - port.ops = &serial_txx9_pops; - port.flags |= UPF_TXX9_HAVE_CTS_LINE; - port.uartclk = 66670000; - port.irq = dev->irq; - port.iotype = UPIO_PORT; - port.iobase = pci_resource_start(dev, 1); - port.dev = &dev->dev; - line = serial_txx9_register_port(&port); - if (line < 0) { - printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line); - pci_disable_device(dev); - return line; - } - pci_set_drvdata(dev, &serial_txx9_ports[line]); - - return 0; -} - -static void __devexit pciserial_txx9_remove_one(struct pci_dev *dev) -{ - struct uart_txx9_port *up = pci_get_drvdata(dev); - - pci_set_drvdata(dev, NULL); - - if (up) { - serial_txx9_unregister_port(up->port.line); - pci_disable_device(dev); - } -} - -#ifdef CONFIG_PM -static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state) -{ - struct uart_txx9_port *up = pci_get_drvdata(dev); - - if (up) - uart_suspend_port(&serial_txx9_reg, &up->port); - pci_save_state(dev); - pci_set_power_state(dev, pci_choose_state(dev, state)); - return 0; -} - -static int pciserial_txx9_resume_one(struct pci_dev *dev) -{ - struct uart_txx9_port *up = pci_get_drvdata(dev); - - pci_set_power_state(dev, PCI_D0); - pci_restore_state(dev); - if (up) - uart_resume_port(&serial_txx9_reg, &up->port); - return 0; -} -#endif - -static const struct pci_device_id serial_txx9_pci_tbl[] = { - { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC) }, - { 0, } -}; - -static struct pci_driver serial_txx9_pci_driver = { - .name = "serial_txx9", - .probe = pciserial_txx9_init_one, - .remove = __devexit_p(pciserial_txx9_remove_one), -#ifdef CONFIG_PM - .suspend = pciserial_txx9_suspend_one, - .resume = pciserial_txx9_resume_one, -#endif - .id_table = serial_txx9_pci_tbl, -}; - -MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl); -#endif /* ENABLE_SERIAL_TXX9_PCI */ - -static struct platform_device *serial_txx9_plat_devs; - -static int __init serial_txx9_init(void) -{ - int ret; - - printk(KERN_INFO "%s version %s\n", serial_name, serial_version); - - ret = uart_register_driver(&serial_txx9_reg); - if (ret) - goto out; - - serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1); - if (!serial_txx9_plat_devs) { - ret = -ENOMEM; - goto unreg_uart_drv; - } - - ret = platform_device_add(serial_txx9_plat_devs); - if (ret) - goto put_dev; - - serial_txx9_register_ports(&serial_txx9_reg, - &serial_txx9_plat_devs->dev); - - ret = platform_driver_register(&serial_txx9_plat_driver); - if (ret) - goto del_dev; - -#ifdef ENABLE_SERIAL_TXX9_PCI - ret = pci_register_driver(&serial_txx9_pci_driver); -#endif - if (ret == 0) - goto out; - - del_dev: - platform_device_del(serial_txx9_plat_devs); - put_dev: - platform_device_put(serial_txx9_plat_devs); - unreg_uart_drv: - uart_unregister_driver(&serial_txx9_reg); - out: - return ret; -} - -static void __exit serial_txx9_exit(void) -{ - int i; - -#ifdef ENABLE_SERIAL_TXX9_PCI - pci_unregister_driver(&serial_txx9_pci_driver); -#endif - platform_driver_unregister(&serial_txx9_plat_driver); - platform_device_unregister(serial_txx9_plat_devs); - for (i = 0; i < UART_NR; i++) { - struct uart_txx9_port *up = &serial_txx9_ports[i]; - if (up->port.iobase || up->port.mapbase) - uart_remove_one_port(&serial_txx9_reg, &up->port); - } - - uart_unregister_driver(&serial_txx9_reg); -} - -module_init(serial_txx9_init); -module_exit(serial_txx9_exit); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("TX39/49 serial driver"); - -MODULE_ALIAS_CHARDEV_MAJOR(TXX9_TTY_MAJOR); diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c deleted file mode 100644 index c291b3add1d2..000000000000 --- a/drivers/serial/sh-sci.c +++ /dev/null @@ -1,2027 +0,0 @@ -/* - * drivers/serial/sh-sci.c - * - * SuperH on-chip serial module support. (SCI with no FIFO / with FIFO) - * - * Copyright (C) 2002 - 2008 Paul Mundt - * Modified to support SH7720 SCIF. Markus Brunner, Mark Jonas (Jul 2007). - * - * based off of the old drivers/char/sh-sci.c by: - * - * Copyright (C) 1999, 2000 Niibe Yutaka - * Copyright (C) 2000 Sugioka Toshinobu - * Modified to support multiple serial ports. Stuart Menefy (May 2000). - * Modified to support SecureEdge. David McCullough (2002) - * Modified to support SH7300 SCIF. Takashi Kusuda (Jun 2003). - * Removed SH7300 support (Jul 2007). - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ -#if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#undef DEBUG - -#include <linux/module.h> -#include <linux/errno.h> -#include <linux/timer.h> -#include <linux/interrupt.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial.h> -#include <linux/major.h> -#include <linux/string.h> -#include <linux/sysrq.h> -#include <linux/ioport.h> -#include <linux/mm.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/console.h> -#include <linux/platform_device.h> -#include <linux/serial_sci.h> -#include <linux/notifier.h> -#include <linux/cpufreq.h> -#include <linux/clk.h> -#include <linux/ctype.h> -#include <linux/err.h> -#include <linux/list.h> -#include <linux/dmaengine.h> -#include <linux/scatterlist.h> -#include <linux/slab.h> - -#ifdef CONFIG_SUPERH -#include <asm/sh_bios.h> -#endif - -#ifdef CONFIG_H8300 -#include <asm/gpio.h> -#endif - -#include "sh-sci.h" - -struct sci_port { - struct uart_port port; - - /* Port type */ - unsigned int type; - - /* Port IRQs: ERI, RXI, TXI, BRI (optional) */ - unsigned int irqs[SCIx_NR_IRQS]; - - /* Port enable callback */ - void (*enable)(struct uart_port *port); - - /* Port disable callback */ - void (*disable)(struct uart_port *port); - - /* Break timer */ - struct timer_list break_timer; - int break_flag; - - /* Interface clock */ - struct clk *iclk; - /* Function clock */ - struct clk *fclk; - - struct list_head node; - struct dma_chan *chan_tx; - struct dma_chan *chan_rx; -#ifdef CONFIG_SERIAL_SH_SCI_DMA - struct device *dma_dev; - unsigned int slave_tx; - unsigned int slave_rx; - struct dma_async_tx_descriptor *desc_tx; - struct dma_async_tx_descriptor *desc_rx[2]; - dma_cookie_t cookie_tx; - dma_cookie_t cookie_rx[2]; - dma_cookie_t active_rx; - struct scatterlist sg_tx; - unsigned int sg_len_tx; - struct scatterlist sg_rx[2]; - size_t buf_len_rx; - struct sh_dmae_slave param_tx; - struct sh_dmae_slave param_rx; - struct work_struct work_tx; - struct work_struct work_rx; - struct timer_list rx_timer; - unsigned int rx_timeout; -#endif -}; - -struct sh_sci_priv { - spinlock_t lock; - struct list_head ports; - struct notifier_block clk_nb; -}; - -/* Function prototypes */ -static void sci_stop_tx(struct uart_port *port); - -#define SCI_NPORTS CONFIG_SERIAL_SH_SCI_NR_UARTS - -static struct sci_port sci_ports[SCI_NPORTS]; -static struct uart_driver sci_uart_driver; - -static inline struct sci_port * -to_sci_port(struct uart_port *uart) -{ - return container_of(uart, struct sci_port, port); -} - -#if defined(CONFIG_CONSOLE_POLL) || defined(CONFIG_SERIAL_SH_SCI_CONSOLE) - -#ifdef CONFIG_CONSOLE_POLL -static inline void handle_error(struct uart_port *port) -{ - /* Clear error flags */ - sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port)); -} - -static int sci_poll_get_char(struct uart_port *port) -{ - unsigned short status; - int c; - - do { - status = sci_in(port, SCxSR); - if (status & SCxSR_ERRORS(port)) { - handle_error(port); - continue; - } - break; - } while (1); - - if (!(status & SCxSR_RDxF(port))) - return NO_POLL_CHAR; - - c = sci_in(port, SCxRDR); - - /* Dummy read */ - sci_in(port, SCxSR); - sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); - - return c; -} -#endif - -static void sci_poll_put_char(struct uart_port *port, unsigned char c) -{ - unsigned short status; - - do { - status = sci_in(port, SCxSR); - } while (!(status & SCxSR_TDxE(port))); - - sci_out(port, SCxTDR, c); - sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port) & ~SCxSR_TEND(port)); -} -#endif /* CONFIG_CONSOLE_POLL || CONFIG_SERIAL_SH_SCI_CONSOLE */ - -#if defined(__H8300H__) || defined(__H8300S__) -static void sci_init_pins(struct uart_port *port, unsigned int cflag) -{ - int ch = (port->mapbase - SMR0) >> 3; - - /* set DDR regs */ - H8300_GPIO_DDR(h8300_sci_pins[ch].port, - h8300_sci_pins[ch].rx, - H8300_GPIO_INPUT); - H8300_GPIO_DDR(h8300_sci_pins[ch].port, - h8300_sci_pins[ch].tx, - H8300_GPIO_OUTPUT); - - /* tx mark output*/ - H8300_SCI_DR(ch) |= h8300_sci_pins[ch].tx; -} -#elif defined(CONFIG_CPU_SUBTYPE_SH7710) || defined(CONFIG_CPU_SUBTYPE_SH7712) -static inline void sci_init_pins(struct uart_port *port, unsigned int cflag) -{ - if (port->mapbase == 0xA4400000) { - __raw_writew(__raw_readw(PACR) & 0xffc0, PACR); - __raw_writew(__raw_readw(PBCR) & 0x0fff, PBCR); - } else if (port->mapbase == 0xA4410000) - __raw_writew(__raw_readw(PBCR) & 0xf003, PBCR); -} -#elif defined(CONFIG_CPU_SUBTYPE_SH7720) || defined(CONFIG_CPU_SUBTYPE_SH7721) -static inline void sci_init_pins(struct uart_port *port, unsigned int cflag) -{ - unsigned short data; - - if (cflag & CRTSCTS) { - /* enable RTS/CTS */ - if (port->mapbase == 0xa4430000) { /* SCIF0 */ - /* Clear PTCR bit 9-2; enable all scif pins but sck */ - data = __raw_readw(PORT_PTCR); - __raw_writew((data & 0xfc03), PORT_PTCR); - } else if (port->mapbase == 0xa4438000) { /* SCIF1 */ - /* Clear PVCR bit 9-2 */ - data = __raw_readw(PORT_PVCR); - __raw_writew((data & 0xfc03), PORT_PVCR); - } - } else { - if (port->mapbase == 0xa4430000) { /* SCIF0 */ - /* Clear PTCR bit 5-2; enable only tx and rx */ - data = __raw_readw(PORT_PTCR); - __raw_writew((data & 0xffc3), PORT_PTCR); - } else if (port->mapbase == 0xa4438000) { /* SCIF1 */ - /* Clear PVCR bit 5-2 */ - data = __raw_readw(PORT_PVCR); - __raw_writew((data & 0xffc3), PORT_PVCR); - } - } -} -#elif defined(CONFIG_CPU_SH3) -/* For SH7705, SH7706, SH7707, SH7709, SH7709A, SH7729 */ -static inline void sci_init_pins(struct uart_port *port, unsigned int cflag) -{ - unsigned short data; - - /* We need to set SCPCR to enable RTS/CTS */ - data = __raw_readw(SCPCR); - /* Clear out SCP7MD1,0, SCP6MD1,0, SCP4MD1,0*/ - __raw_writew(data & 0x0fcf, SCPCR); - - if (!(cflag & CRTSCTS)) { - /* We need to set SCPCR to enable RTS/CTS */ - data = __raw_readw(SCPCR); - /* Clear out SCP7MD1,0, SCP4MD1,0, - Set SCP6MD1,0 = {01} (output) */ - __raw_writew((data & 0x0fcf) | 0x1000, SCPCR); - - data = __raw_readb(SCPDR); - /* Set /RTS2 (bit6) = 0 */ - __raw_writeb(data & 0xbf, SCPDR); - } -} -#elif defined(CONFIG_CPU_SUBTYPE_SH7722) -static inline void sci_init_pins(struct uart_port *port, unsigned int cflag) -{ - unsigned short data; - - if (port->mapbase == 0xffe00000) { - data = __raw_readw(PSCR); - data &= ~0x03cf; - if (!(cflag & CRTSCTS)) - data |= 0x0340; - - __raw_writew(data, PSCR); - } -} -#elif defined(CONFIG_CPU_SUBTYPE_SH7757) || \ - defined(CONFIG_CPU_SUBTYPE_SH7763) || \ - defined(CONFIG_CPU_SUBTYPE_SH7780) || \ - defined(CONFIG_CPU_SUBTYPE_SH7785) || \ - defined(CONFIG_CPU_SUBTYPE_SH7786) || \ - defined(CONFIG_CPU_SUBTYPE_SHX3) -static inline void sci_init_pins(struct uart_port *port, unsigned int cflag) -{ - if (!(cflag & CRTSCTS)) - __raw_writew(0x0080, SCSPTR0); /* Set RTS = 1 */ -} -#elif defined(CONFIG_CPU_SH4) && !defined(CONFIG_CPU_SH4A) -static inline void sci_init_pins(struct uart_port *port, unsigned int cflag) -{ - if (!(cflag & CRTSCTS)) - __raw_writew(0x0080, SCSPTR2); /* Set RTS = 1 */ -} -#else -static inline void sci_init_pins(struct uart_port *port, unsigned int cflag) -{ - /* Nothing to do */ -} -#endif - -#if defined(CONFIG_CPU_SUBTYPE_SH7760) || \ - defined(CONFIG_CPU_SUBTYPE_SH7780) || \ - defined(CONFIG_CPU_SUBTYPE_SH7785) || \ - defined(CONFIG_CPU_SUBTYPE_SH7786) -static int scif_txfill(struct uart_port *port) -{ - return sci_in(port, SCTFDR) & 0xff; -} - -static int scif_txroom(struct uart_port *port) -{ - return SCIF_TXROOM_MAX - scif_txfill(port); -} - -static int scif_rxfill(struct uart_port *port) -{ - return sci_in(port, SCRFDR) & 0xff; -} -#elif defined(CONFIG_CPU_SUBTYPE_SH7763) -static int scif_txfill(struct uart_port *port) -{ - if (port->mapbase == 0xffe00000 || - port->mapbase == 0xffe08000) - /* SCIF0/1*/ - return sci_in(port, SCTFDR) & 0xff; - else - /* SCIF2 */ - return sci_in(port, SCFDR) >> 8; -} - -static int scif_txroom(struct uart_port *port) -{ - if (port->mapbase == 0xffe00000 || - port->mapbase == 0xffe08000) - /* SCIF0/1*/ - return SCIF_TXROOM_MAX - scif_txfill(port); - else - /* SCIF2 */ - return SCIF2_TXROOM_MAX - scif_txfill(port); -} - -static int scif_rxfill(struct uart_port *port) -{ - if ((port->mapbase == 0xffe00000) || - (port->mapbase == 0xffe08000)) { - /* SCIF0/1*/ - return sci_in(port, SCRFDR) & 0xff; - } else { - /* SCIF2 */ - return sci_in(port, SCFDR) & SCIF2_RFDC_MASK; - } -} -#elif defined(CONFIG_ARCH_SH7372) -static int scif_txfill(struct uart_port *port) -{ - if (port->type == PORT_SCIFA) - return sci_in(port, SCFDR) >> 8; - else - return sci_in(port, SCTFDR); -} - -static int scif_txroom(struct uart_port *port) -{ - return port->fifosize - scif_txfill(port); -} - -static int scif_rxfill(struct uart_port *port) -{ - if (port->type == PORT_SCIFA) - return sci_in(port, SCFDR) & SCIF_RFDC_MASK; - else - return sci_in(port, SCRFDR); -} -#else -static int scif_txfill(struct uart_port *port) -{ - return sci_in(port, SCFDR) >> 8; -} - -static int scif_txroom(struct uart_port *port) -{ - return SCIF_TXROOM_MAX - scif_txfill(port); -} - -static int scif_rxfill(struct uart_port *port) -{ - return sci_in(port, SCFDR) & SCIF_RFDC_MASK; -} -#endif - -static int sci_txfill(struct uart_port *port) -{ - return !(sci_in(port, SCxSR) & SCI_TDRE); -} - -static int sci_txroom(struct uart_port *port) -{ - return !sci_txfill(port); -} - -static int sci_rxfill(struct uart_port *port) -{ - return (sci_in(port, SCxSR) & SCxSR_RDxF(port)) != 0; -} - -/* ********************************************************************** * - * the interrupt related routines * - * ********************************************************************** */ - -static void sci_transmit_chars(struct uart_port *port) -{ - struct circ_buf *xmit = &port->state->xmit; - unsigned int stopped = uart_tx_stopped(port); - unsigned short status; - unsigned short ctrl; - int count; - - status = sci_in(port, SCxSR); - if (!(status & SCxSR_TDxE(port))) { - ctrl = sci_in(port, SCSCR); - if (uart_circ_empty(xmit)) - ctrl &= ~SCI_CTRL_FLAGS_TIE; - else - ctrl |= SCI_CTRL_FLAGS_TIE; - sci_out(port, SCSCR, ctrl); - return; - } - - if (port->type == PORT_SCI) - count = sci_txroom(port); - else - count = scif_txroom(port); - - do { - unsigned char c; - - if (port->x_char) { - c = port->x_char; - port->x_char = 0; - } else if (!uart_circ_empty(xmit) && !stopped) { - c = xmit->buf[xmit->tail]; - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - } else { - break; - } - - sci_out(port, SCxTDR, c); - - port->icount.tx++; - } while (--count > 0); - - sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port)); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - if (uart_circ_empty(xmit)) { - sci_stop_tx(port); - } else { - ctrl = sci_in(port, SCSCR); - - if (port->type != PORT_SCI) { - sci_in(port, SCxSR); /* Dummy read */ - sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port)); - } - - ctrl |= SCI_CTRL_FLAGS_TIE; - sci_out(port, SCSCR, ctrl); - } -} - -/* On SH3, SCIF may read end-of-break as a space->mark char */ -#define STEPFN(c) ({int __c = (c); (((__c-1)|(__c)) == -1); }) - -static inline void sci_receive_chars(struct uart_port *port) -{ - struct sci_port *sci_port = to_sci_port(port); - struct tty_struct *tty = port->state->port.tty; - int i, count, copied = 0; - unsigned short status; - unsigned char flag; - - status = sci_in(port, SCxSR); - if (!(status & SCxSR_RDxF(port))) - return; - - while (1) { - if (port->type == PORT_SCI) - count = sci_rxfill(port); - else - count = scif_rxfill(port); - - /* Don't copy more bytes than there is room for in the buffer */ - count = tty_buffer_request_room(tty, count); - - /* If for any reason we can't copy more data, we're done! */ - if (count == 0) - break; - - if (port->type == PORT_SCI) { - char c = sci_in(port, SCxRDR); - if (uart_handle_sysrq_char(port, c) || - sci_port->break_flag) - count = 0; - else - tty_insert_flip_char(tty, c, TTY_NORMAL); - } else { - for (i = 0; i < count; i++) { - char c = sci_in(port, SCxRDR); - status = sci_in(port, SCxSR); -#if defined(CONFIG_CPU_SH3) - /* Skip "chars" during break */ - if (sci_port->break_flag) { - if ((c == 0) && - (status & SCxSR_FER(port))) { - count--; i--; - continue; - } - - /* Nonzero => end-of-break */ - dev_dbg(port->dev, "debounce<%02x>\n", c); - sci_port->break_flag = 0; - - if (STEPFN(c)) { - count--; i--; - continue; - } - } -#endif /* CONFIG_CPU_SH3 */ - if (uart_handle_sysrq_char(port, c)) { - count--; i--; - continue; - } - - /* Store data and status */ - if (status & SCxSR_FER(port)) { - flag = TTY_FRAME; - dev_notice(port->dev, "frame error\n"); - } else if (status & SCxSR_PER(port)) { - flag = TTY_PARITY; - dev_notice(port->dev, "parity error\n"); - } else - flag = TTY_NORMAL; - - tty_insert_flip_char(tty, c, flag); - } - } - - sci_in(port, SCxSR); /* dummy read */ - sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); - - copied += count; - port->icount.rx += count; - } - - if (copied) { - /* Tell the rest of the system the news. New characters! */ - tty_flip_buffer_push(tty); - } else { - sci_in(port, SCxSR); /* dummy read */ - sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); - } -} - -#define SCI_BREAK_JIFFIES (HZ/20) -/* The sci generates interrupts during the break, - * 1 per millisecond or so during the break period, for 9600 baud. - * So dont bother disabling interrupts. - * But dont want more than 1 break event. - * Use a kernel timer to periodically poll the rx line until - * the break is finished. - */ -static void sci_schedule_break_timer(struct sci_port *port) -{ - port->break_timer.expires = jiffies + SCI_BREAK_JIFFIES; - add_timer(&port->break_timer); -} -/* Ensure that two consecutive samples find the break over. */ -static void sci_break_timer(unsigned long data) -{ - struct sci_port *port = (struct sci_port *)data; - - if (sci_rxd_in(&port->port) == 0) { - port->break_flag = 1; - sci_schedule_break_timer(port); - } else if (port->break_flag == 1) { - /* break is over. */ - port->break_flag = 2; - sci_schedule_break_timer(port); - } else - port->break_flag = 0; -} - -static inline int sci_handle_errors(struct uart_port *port) -{ - int copied = 0; - unsigned short status = sci_in(port, SCxSR); - struct tty_struct *tty = port->state->port.tty; - - if (status & SCxSR_ORER(port)) { - /* overrun error */ - if (tty_insert_flip_char(tty, 0, TTY_OVERRUN)) - copied++; - - dev_notice(port->dev, "overrun error"); - } - - if (status & SCxSR_FER(port)) { - if (sci_rxd_in(port) == 0) { - /* Notify of BREAK */ - struct sci_port *sci_port = to_sci_port(port); - - if (!sci_port->break_flag) { - sci_port->break_flag = 1; - sci_schedule_break_timer(sci_port); - - /* Do sysrq handling. */ - if (uart_handle_break(port)) - return 0; - - dev_dbg(port->dev, "BREAK detected\n"); - - if (tty_insert_flip_char(tty, 0, TTY_BREAK)) - copied++; - } - - } else { - /* frame error */ - if (tty_insert_flip_char(tty, 0, TTY_FRAME)) - copied++; - - dev_notice(port->dev, "frame error\n"); - } - } - - if (status & SCxSR_PER(port)) { - /* parity error */ - if (tty_insert_flip_char(tty, 0, TTY_PARITY)) - copied++; - - dev_notice(port->dev, "parity error"); - } - - if (copied) - tty_flip_buffer_push(tty); - - return copied; -} - -static inline int sci_handle_fifo_overrun(struct uart_port *port) -{ - struct tty_struct *tty = port->state->port.tty; - int copied = 0; - - if (port->type != PORT_SCIF) - return 0; - - if ((sci_in(port, SCLSR) & SCIF_ORER) != 0) { - sci_out(port, SCLSR, 0); - - tty_insert_flip_char(tty, 0, TTY_OVERRUN); - tty_flip_buffer_push(tty); - - dev_notice(port->dev, "overrun error\n"); - copied++; - } - - return copied; -} - -static inline int sci_handle_breaks(struct uart_port *port) -{ - int copied = 0; - unsigned short status = sci_in(port, SCxSR); - struct tty_struct *tty = port->state->port.tty; - struct sci_port *s = to_sci_port(port); - - if (uart_handle_break(port)) - return 0; - - if (!s->break_flag && status & SCxSR_BRK(port)) { -#if defined(CONFIG_CPU_SH3) - /* Debounce break */ - s->break_flag = 1; -#endif - /* Notify of BREAK */ - if (tty_insert_flip_char(tty, 0, TTY_BREAK)) - copied++; - - dev_dbg(port->dev, "BREAK detected\n"); - } - - if (copied) - tty_flip_buffer_push(tty); - - copied += sci_handle_fifo_overrun(port); - - return copied; -} - -static irqreturn_t sci_rx_interrupt(int irq, void *ptr) -{ -#ifdef CONFIG_SERIAL_SH_SCI_DMA - struct uart_port *port = ptr; - struct sci_port *s = to_sci_port(port); - - if (s->chan_rx) { - u16 scr = sci_in(port, SCSCR); - u16 ssr = sci_in(port, SCxSR); - - /* Disable future Rx interrupts */ - if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) { - disable_irq_nosync(irq); - scr |= 0x4000; - } else { - scr &= ~SCI_CTRL_FLAGS_RIE; - } - sci_out(port, SCSCR, scr); - /* Clear current interrupt */ - sci_out(port, SCxSR, ssr & ~(1 | SCxSR_RDxF(port))); - dev_dbg(port->dev, "Rx IRQ %lu: setup t-out in %u jiffies\n", - jiffies, s->rx_timeout); - mod_timer(&s->rx_timer, jiffies + s->rx_timeout); - - return IRQ_HANDLED; - } -#endif - - /* I think sci_receive_chars has to be called irrespective - * of whether the I_IXOFF is set, otherwise, how is the interrupt - * to be disabled? - */ - sci_receive_chars(ptr); - - return IRQ_HANDLED; -} - -static irqreturn_t sci_tx_interrupt(int irq, void *ptr) -{ - struct uart_port *port = ptr; - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - sci_transmit_chars(port); - spin_unlock_irqrestore(&port->lock, flags); - - return IRQ_HANDLED; -} - -static irqreturn_t sci_er_interrupt(int irq, void *ptr) -{ - struct uart_port *port = ptr; - - /* Handle errors */ - if (port->type == PORT_SCI) { - if (sci_handle_errors(port)) { - /* discard character in rx buffer */ - sci_in(port, SCxSR); - sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port)); - } - } else { - sci_handle_fifo_overrun(port); - sci_rx_interrupt(irq, ptr); - } - - sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port)); - - /* Kick the transmission */ - sci_tx_interrupt(irq, ptr); - - return IRQ_HANDLED; -} - -static irqreturn_t sci_br_interrupt(int irq, void *ptr) -{ - struct uart_port *port = ptr; - - /* Handle BREAKs */ - sci_handle_breaks(port); - sci_out(port, SCxSR, SCxSR_BREAK_CLEAR(port)); - - return IRQ_HANDLED; -} - -static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr) -{ - unsigned short ssr_status, scr_status, err_enabled; - struct uart_port *port = ptr; - struct sci_port *s = to_sci_port(port); - irqreturn_t ret = IRQ_NONE; - - ssr_status = sci_in(port, SCxSR); - scr_status = sci_in(port, SCSCR); - err_enabled = scr_status & (SCI_CTRL_FLAGS_REIE | SCI_CTRL_FLAGS_RIE); - - /* Tx Interrupt */ - if ((ssr_status & SCxSR_TDxE(port)) && (scr_status & SCI_CTRL_FLAGS_TIE) && - !s->chan_tx) - ret = sci_tx_interrupt(irq, ptr); - /* - * Rx Interrupt: if we're using DMA, the DMA controller clears RDF / - * DR flags - */ - if (((ssr_status & SCxSR_RDxF(port)) || s->chan_rx) && - (scr_status & SCI_CTRL_FLAGS_RIE)) - ret = sci_rx_interrupt(irq, ptr); - /* Error Interrupt */ - if ((ssr_status & SCxSR_ERRORS(port)) && err_enabled) - ret = sci_er_interrupt(irq, ptr); - /* Break Interrupt */ - if ((ssr_status & SCxSR_BRK(port)) && err_enabled) - ret = sci_br_interrupt(irq, ptr); - - return ret; -} - -/* - * Here we define a transistion notifier so that we can update all of our - * ports' baud rate when the peripheral clock changes. - */ -static int sci_notifier(struct notifier_block *self, - unsigned long phase, void *p) -{ - struct sh_sci_priv *priv = container_of(self, - struct sh_sci_priv, clk_nb); - struct sci_port *sci_port; - unsigned long flags; - - if ((phase == CPUFREQ_POSTCHANGE) || - (phase == CPUFREQ_RESUMECHANGE)) { - spin_lock_irqsave(&priv->lock, flags); - list_for_each_entry(sci_port, &priv->ports, node) - sci_port->port.uartclk = clk_get_rate(sci_port->iclk); - spin_unlock_irqrestore(&priv->lock, flags); - } - - return NOTIFY_OK; -} - -static void sci_clk_enable(struct uart_port *port) -{ - struct sci_port *sci_port = to_sci_port(port); - - clk_enable(sci_port->iclk); - sci_port->port.uartclk = clk_get_rate(sci_port->iclk); - clk_enable(sci_port->fclk); -} - -static void sci_clk_disable(struct uart_port *port) -{ - struct sci_port *sci_port = to_sci_port(port); - - clk_disable(sci_port->fclk); - clk_disable(sci_port->iclk); -} - -static int sci_request_irq(struct sci_port *port) -{ - int i; - irqreturn_t (*handlers[4])(int irq, void *ptr) = { - sci_er_interrupt, sci_rx_interrupt, sci_tx_interrupt, - sci_br_interrupt, - }; - const char *desc[] = { "SCI Receive Error", "SCI Receive Data Full", - "SCI Transmit Data Empty", "SCI Break" }; - - if (port->irqs[0] == port->irqs[1]) { - if (unlikely(!port->irqs[0])) - return -ENODEV; - - if (request_irq(port->irqs[0], sci_mpxed_interrupt, - IRQF_DISABLED, "sci", port)) { - dev_err(port->port.dev, "Can't allocate IRQ\n"); - return -ENODEV; - } - } else { - for (i = 0; i < ARRAY_SIZE(handlers); i++) { - if (unlikely(!port->irqs[i])) - continue; - - if (request_irq(port->irqs[i], handlers[i], - IRQF_DISABLED, desc[i], port)) { - dev_err(port->port.dev, "Can't allocate IRQ\n"); - return -ENODEV; - } - } - } - - return 0; -} - -static void sci_free_irq(struct sci_port *port) -{ - int i; - - if (port->irqs[0] == port->irqs[1]) - free_irq(port->irqs[0], port); - else { - for (i = 0; i < ARRAY_SIZE(port->irqs); i++) { - if (!port->irqs[i]) - continue; - - free_irq(port->irqs[i], port); - } - } -} - -static unsigned int sci_tx_empty(struct uart_port *port) -{ - unsigned short status = sci_in(port, SCxSR); - unsigned short in_tx_fifo = scif_txfill(port); - - return (status & SCxSR_TEND(port)) && !in_tx_fifo ? TIOCSER_TEMT : 0; -} - -static void sci_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - /* This routine is used for seting signals of: DTR, DCD, CTS/RTS */ - /* We use SCIF's hardware for CTS/RTS, so don't need any for that. */ - /* If you have signals for DTR and DCD, please implement here. */ -} - -static unsigned int sci_get_mctrl(struct uart_port *port) -{ - /* This routine is used for getting signals of: DTR, DCD, DSR, RI, - and CTS/RTS */ - - return TIOCM_DTR | TIOCM_RTS | TIOCM_DSR; -} - -#ifdef CONFIG_SERIAL_SH_SCI_DMA -static void sci_dma_tx_complete(void *arg) -{ - struct sci_port *s = arg; - struct uart_port *port = &s->port; - struct circ_buf *xmit = &port->state->xmit; - unsigned long flags; - - dev_dbg(port->dev, "%s(%d)\n", __func__, port->line); - - spin_lock_irqsave(&port->lock, flags); - - xmit->tail += sg_dma_len(&s->sg_tx); - xmit->tail &= UART_XMIT_SIZE - 1; - - port->icount.tx += sg_dma_len(&s->sg_tx); - - async_tx_ack(s->desc_tx); - s->cookie_tx = -EINVAL; - s->desc_tx = NULL; - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (!uart_circ_empty(xmit)) { - schedule_work(&s->work_tx); - } else if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) { - u16 ctrl = sci_in(port, SCSCR); - sci_out(port, SCSCR, ctrl & ~SCI_CTRL_FLAGS_TIE); - } - - spin_unlock_irqrestore(&port->lock, flags); -} - -/* Locking: called with port lock held */ -static int sci_dma_rx_push(struct sci_port *s, struct tty_struct *tty, - size_t count) -{ - struct uart_port *port = &s->port; - int i, active, room; - - room = tty_buffer_request_room(tty, count); - - if (s->active_rx == s->cookie_rx[0]) { - active = 0; - } else if (s->active_rx == s->cookie_rx[1]) { - active = 1; - } else { - dev_err(port->dev, "cookie %d not found!\n", s->active_rx); - return 0; - } - - if (room < count) - dev_warn(port->dev, "Rx overrun: dropping %u bytes\n", - count - room); - if (!room) - return room; - - for (i = 0; i < room; i++) - tty_insert_flip_char(tty, ((u8 *)sg_virt(&s->sg_rx[active]))[i], - TTY_NORMAL); - - port->icount.rx += room; - - return room; -} - -static void sci_dma_rx_complete(void *arg) -{ - struct sci_port *s = arg; - struct uart_port *port = &s->port; - struct tty_struct *tty = port->state->port.tty; - unsigned long flags; - int count; - - dev_dbg(port->dev, "%s(%d) active #%d\n", __func__, port->line, s->active_rx); - - spin_lock_irqsave(&port->lock, flags); - - count = sci_dma_rx_push(s, tty, s->buf_len_rx); - - mod_timer(&s->rx_timer, jiffies + s->rx_timeout); - - spin_unlock_irqrestore(&port->lock, flags); - - if (count) - tty_flip_buffer_push(tty); - - schedule_work(&s->work_rx); -} - -static void sci_start_rx(struct uart_port *port); -static void sci_start_tx(struct uart_port *port); - -static void sci_rx_dma_release(struct sci_port *s, bool enable_pio) -{ - struct dma_chan *chan = s->chan_rx; - struct uart_port *port = &s->port; - - s->chan_rx = NULL; - s->cookie_rx[0] = s->cookie_rx[1] = -EINVAL; - dma_release_channel(chan); - if (sg_dma_address(&s->sg_rx[0])) - dma_free_coherent(port->dev, s->buf_len_rx * 2, - sg_virt(&s->sg_rx[0]), sg_dma_address(&s->sg_rx[0])); - if (enable_pio) - sci_start_rx(port); -} - -static void sci_tx_dma_release(struct sci_port *s, bool enable_pio) -{ - struct dma_chan *chan = s->chan_tx; - struct uart_port *port = &s->port; - - s->chan_tx = NULL; - s->cookie_tx = -EINVAL; - dma_release_channel(chan); - if (enable_pio) - sci_start_tx(port); -} - -static void sci_submit_rx(struct sci_port *s) -{ - struct dma_chan *chan = s->chan_rx; - int i; - - for (i = 0; i < 2; i++) { - struct scatterlist *sg = &s->sg_rx[i]; - struct dma_async_tx_descriptor *desc; - - desc = chan->device->device_prep_slave_sg(chan, - sg, 1, DMA_FROM_DEVICE, DMA_PREP_INTERRUPT); - - if (desc) { - s->desc_rx[i] = desc; - desc->callback = sci_dma_rx_complete; - desc->callback_param = s; - s->cookie_rx[i] = desc->tx_submit(desc); - } - - if (!desc || s->cookie_rx[i] < 0) { - if (i) { - async_tx_ack(s->desc_rx[0]); - s->cookie_rx[0] = -EINVAL; - } - if (desc) { - async_tx_ack(desc); - s->cookie_rx[i] = -EINVAL; - } - dev_warn(s->port.dev, - "failed to re-start DMA, using PIO\n"); - sci_rx_dma_release(s, true); - return; - } - dev_dbg(s->port.dev, "%s(): cookie %d to #%d\n", __func__, - s->cookie_rx[i], i); - } - - s->active_rx = s->cookie_rx[0]; - - dma_async_issue_pending(chan); -} - -static void work_fn_rx(struct work_struct *work) -{ - struct sci_port *s = container_of(work, struct sci_port, work_rx); - struct uart_port *port = &s->port; - struct dma_async_tx_descriptor *desc; - int new; - - if (s->active_rx == s->cookie_rx[0]) { - new = 0; - } else if (s->active_rx == s->cookie_rx[1]) { - new = 1; - } else { - dev_err(port->dev, "cookie %d not found!\n", s->active_rx); - return; - } - desc = s->desc_rx[new]; - - if (dma_async_is_tx_complete(s->chan_rx, s->active_rx, NULL, NULL) != - DMA_SUCCESS) { - /* Handle incomplete DMA receive */ - struct tty_struct *tty = port->state->port.tty; - struct dma_chan *chan = s->chan_rx; - struct sh_desc *sh_desc = container_of(desc, struct sh_desc, - async_tx); - unsigned long flags; - int count; - - chan->device->device_control(chan, DMA_TERMINATE_ALL, 0); - dev_dbg(port->dev, "Read %u bytes with cookie %d\n", - sh_desc->partial, sh_desc->cookie); - - spin_lock_irqsave(&port->lock, flags); - count = sci_dma_rx_push(s, tty, sh_desc->partial); - spin_unlock_irqrestore(&port->lock, flags); - - if (count) - tty_flip_buffer_push(tty); - - sci_submit_rx(s); - - return; - } - - s->cookie_rx[new] = desc->tx_submit(desc); - if (s->cookie_rx[new] < 0) { - dev_warn(port->dev, "Failed submitting Rx DMA descriptor\n"); - sci_rx_dma_release(s, true); - return; - } - - s->active_rx = s->cookie_rx[!new]; - - dev_dbg(port->dev, "%s: cookie %d #%d, new active #%d\n", __func__, - s->cookie_rx[new], new, s->active_rx); -} - -static void work_fn_tx(struct work_struct *work) -{ - struct sci_port *s = container_of(work, struct sci_port, work_tx); - struct dma_async_tx_descriptor *desc; - struct dma_chan *chan = s->chan_tx; - struct uart_port *port = &s->port; - struct circ_buf *xmit = &port->state->xmit; - struct scatterlist *sg = &s->sg_tx; - - /* - * DMA is idle now. - * Port xmit buffer is already mapped, and it is one page... Just adjust - * offsets and lengths. Since it is a circular buffer, we have to - * transmit till the end, and then the rest. Take the port lock to get a - * consistent xmit buffer state. - */ - spin_lock_irq(&port->lock); - sg->offset = xmit->tail & (UART_XMIT_SIZE - 1); - sg_dma_address(sg) = (sg_dma_address(sg) & ~(UART_XMIT_SIZE - 1)) + - sg->offset; - sg_dma_len(sg) = min((int)CIRC_CNT(xmit->head, xmit->tail, UART_XMIT_SIZE), - CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE)); - spin_unlock_irq(&port->lock); - - BUG_ON(!sg_dma_len(sg)); - - desc = chan->device->device_prep_slave_sg(chan, - sg, s->sg_len_tx, DMA_TO_DEVICE, - DMA_PREP_INTERRUPT | DMA_CTRL_ACK); - if (!desc) { - /* switch to PIO */ - sci_tx_dma_release(s, true); - return; - } - - dma_sync_sg_for_device(port->dev, sg, 1, DMA_TO_DEVICE); - - spin_lock_irq(&port->lock); - s->desc_tx = desc; - desc->callback = sci_dma_tx_complete; - desc->callback_param = s; - spin_unlock_irq(&port->lock); - s->cookie_tx = desc->tx_submit(desc); - if (s->cookie_tx < 0) { - dev_warn(port->dev, "Failed submitting Tx DMA descriptor\n"); - /* switch to PIO */ - sci_tx_dma_release(s, true); - return; - } - - dev_dbg(port->dev, "%s: %p: %d...%d, cookie %d\n", __func__, - xmit->buf, xmit->tail, xmit->head, s->cookie_tx); - - dma_async_issue_pending(chan); -} -#endif - -static void sci_start_tx(struct uart_port *port) -{ - struct sci_port *s = to_sci_port(port); - unsigned short ctrl; - -#ifdef CONFIG_SERIAL_SH_SCI_DMA - if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) { - u16 new, scr = sci_in(port, SCSCR); - if (s->chan_tx) - new = scr | 0x8000; - else - new = scr & ~0x8000; - if (new != scr) - sci_out(port, SCSCR, new); - } - if (s->chan_tx && !uart_circ_empty(&s->port.state->xmit) && - s->cookie_tx < 0) - schedule_work(&s->work_tx); -#endif - if (!s->chan_tx || port->type == PORT_SCIFA || port->type == PORT_SCIFB) { - /* Set TIE (Transmit Interrupt Enable) bit in SCSCR */ - ctrl = sci_in(port, SCSCR); - sci_out(port, SCSCR, ctrl | SCI_CTRL_FLAGS_TIE); - } -} - -static void sci_stop_tx(struct uart_port *port) -{ - unsigned short ctrl; - - /* Clear TIE (Transmit Interrupt Enable) bit in SCSCR */ - ctrl = sci_in(port, SCSCR); - if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) - ctrl &= ~0x8000; - ctrl &= ~SCI_CTRL_FLAGS_TIE; - sci_out(port, SCSCR, ctrl); -} - -static void sci_start_rx(struct uart_port *port) -{ - unsigned short ctrl = SCI_CTRL_FLAGS_RIE | SCI_CTRL_FLAGS_REIE; - - /* Set RIE (Receive Interrupt Enable) bit in SCSCR */ - ctrl |= sci_in(port, SCSCR); - if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) - ctrl &= ~0x4000; - sci_out(port, SCSCR, ctrl); -} - -static void sci_stop_rx(struct uart_port *port) -{ - unsigned short ctrl; - - /* Clear RIE (Receive Interrupt Enable) bit in SCSCR */ - ctrl = sci_in(port, SCSCR); - if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) - ctrl &= ~0x4000; - ctrl &= ~(SCI_CTRL_FLAGS_RIE | SCI_CTRL_FLAGS_REIE); - sci_out(port, SCSCR, ctrl); -} - -static void sci_enable_ms(struct uart_port *port) -{ - /* Nothing here yet .. */ -} - -static void sci_break_ctl(struct uart_port *port, int break_state) -{ - /* Nothing here yet .. */ -} - -#ifdef CONFIG_SERIAL_SH_SCI_DMA -static bool filter(struct dma_chan *chan, void *slave) -{ - struct sh_dmae_slave *param = slave; - - dev_dbg(chan->device->dev, "%s: slave ID %d\n", __func__, - param->slave_id); - - if (param->dma_dev == chan->device->dev) { - chan->private = param; - return true; - } else { - return false; - } -} - -static void rx_timer_fn(unsigned long arg) -{ - struct sci_port *s = (struct sci_port *)arg; - struct uart_port *port = &s->port; - u16 scr = sci_in(port, SCSCR); - - if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) { - scr &= ~0x4000; - enable_irq(s->irqs[1]); - } - sci_out(port, SCSCR, scr | SCI_CTRL_FLAGS_RIE); - dev_dbg(port->dev, "DMA Rx timed out\n"); - schedule_work(&s->work_rx); -} - -static void sci_request_dma(struct uart_port *port) -{ - struct sci_port *s = to_sci_port(port); - struct sh_dmae_slave *param; - struct dma_chan *chan; - dma_cap_mask_t mask; - int nent; - - dev_dbg(port->dev, "%s: port %d DMA %p\n", __func__, - port->line, s->dma_dev); - - if (!s->dma_dev) - return; - - dma_cap_zero(mask); - dma_cap_set(DMA_SLAVE, mask); - - param = &s->param_tx; - - /* Slave ID, e.g., SHDMA_SLAVE_SCIF0_TX */ - param->slave_id = s->slave_tx; - param->dma_dev = s->dma_dev; - - s->cookie_tx = -EINVAL; - chan = dma_request_channel(mask, filter, param); - dev_dbg(port->dev, "%s: TX: got channel %p\n", __func__, chan); - if (chan) { - s->chan_tx = chan; - sg_init_table(&s->sg_tx, 1); - /* UART circular tx buffer is an aligned page. */ - BUG_ON((int)port->state->xmit.buf & ~PAGE_MASK); - sg_set_page(&s->sg_tx, virt_to_page(port->state->xmit.buf), - UART_XMIT_SIZE, (int)port->state->xmit.buf & ~PAGE_MASK); - nent = dma_map_sg(port->dev, &s->sg_tx, 1, DMA_TO_DEVICE); - if (!nent) - sci_tx_dma_release(s, false); - else - dev_dbg(port->dev, "%s: mapped %d@%p to %x\n", __func__, - sg_dma_len(&s->sg_tx), - port->state->xmit.buf, sg_dma_address(&s->sg_tx)); - - s->sg_len_tx = nent; - - INIT_WORK(&s->work_tx, work_fn_tx); - } - - param = &s->param_rx; - - /* Slave ID, e.g., SHDMA_SLAVE_SCIF0_RX */ - param->slave_id = s->slave_rx; - param->dma_dev = s->dma_dev; - - chan = dma_request_channel(mask, filter, param); - dev_dbg(port->dev, "%s: RX: got channel %p\n", __func__, chan); - if (chan) { - dma_addr_t dma[2]; - void *buf[2]; - int i; - - s->chan_rx = chan; - - s->buf_len_rx = 2 * max(16, (int)port->fifosize); - buf[0] = dma_alloc_coherent(port->dev, s->buf_len_rx * 2, - &dma[0], GFP_KERNEL); - - if (!buf[0]) { - dev_warn(port->dev, - "failed to allocate dma buffer, using PIO\n"); - sci_rx_dma_release(s, true); - return; - } - - buf[1] = buf[0] + s->buf_len_rx; - dma[1] = dma[0] + s->buf_len_rx; - - for (i = 0; i < 2; i++) { - struct scatterlist *sg = &s->sg_rx[i]; - - sg_init_table(sg, 1); - sg_set_page(sg, virt_to_page(buf[i]), s->buf_len_rx, - (int)buf[i] & ~PAGE_MASK); - sg_dma_address(sg) = dma[i]; - } - - INIT_WORK(&s->work_rx, work_fn_rx); - setup_timer(&s->rx_timer, rx_timer_fn, (unsigned long)s); - - sci_submit_rx(s); - } -} - -static void sci_free_dma(struct uart_port *port) -{ - struct sci_port *s = to_sci_port(port); - - if (!s->dma_dev) - return; - - if (s->chan_tx) - sci_tx_dma_release(s, false); - if (s->chan_rx) - sci_rx_dma_release(s, false); -} -#endif - -static int sci_startup(struct uart_port *port) -{ - struct sci_port *s = to_sci_port(port); - - dev_dbg(port->dev, "%s(%d)\n", __func__, port->line); - - if (s->enable) - s->enable(port); - - sci_request_irq(s); -#ifdef CONFIG_SERIAL_SH_SCI_DMA - sci_request_dma(port); -#endif - sci_start_tx(port); - sci_start_rx(port); - - return 0; -} - -static void sci_shutdown(struct uart_port *port) -{ - struct sci_port *s = to_sci_port(port); - - dev_dbg(port->dev, "%s(%d)\n", __func__, port->line); - - sci_stop_rx(port); - sci_stop_tx(port); -#ifdef CONFIG_SERIAL_SH_SCI_DMA - sci_free_dma(port); -#endif - sci_free_irq(s); - - if (s->disable) - s->disable(port); -} - -static void sci_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ -#ifdef CONFIG_SERIAL_SH_SCI_DMA - struct sci_port *s = to_sci_port(port); -#endif - unsigned int status, baud, smr_val, max_baud; - int t = -1; - u16 scfcr = 0; - - /* - * earlyprintk comes here early on with port->uartclk set to zero. - * the clock framework is not up and running at this point so here - * we assume that 115200 is the maximum baud rate. please note that - * the baud rate is not programmed during earlyprintk - it is assumed - * that the previous boot loader has enabled required clocks and - * setup the baud rate generator hardware for us already. - */ - max_baud = port->uartclk ? port->uartclk / 16 : 115200; - - baud = uart_get_baud_rate(port, termios, old, 0, max_baud); - if (likely(baud && port->uartclk)) - t = SCBRR_VALUE(baud, port->uartclk); - - do { - status = sci_in(port, SCxSR); - } while (!(status & SCxSR_TEND(port))); - - sci_out(port, SCSCR, 0x00); /* TE=0, RE=0, CKE1=0 */ - - if (port->type != PORT_SCI) - sci_out(port, SCFCR, scfcr | SCFCR_RFRST | SCFCR_TFRST); - - smr_val = sci_in(port, SCSMR) & 3; - if ((termios->c_cflag & CSIZE) == CS7) - smr_val |= 0x40; - if (termios->c_cflag & PARENB) - smr_val |= 0x20; - if (termios->c_cflag & PARODD) - smr_val |= 0x30; - if (termios->c_cflag & CSTOPB) - smr_val |= 0x08; - - uart_update_timeout(port, termios->c_cflag, baud); - - sci_out(port, SCSMR, smr_val); - - dev_dbg(port->dev, "%s: SMR %x, t %x, SCSCR %x\n", __func__, smr_val, t, - SCSCR_INIT(port)); - - if (t > 0) { - if (t >= 256) { - sci_out(port, SCSMR, (sci_in(port, SCSMR) & ~3) | 1); - t >>= 2; - } else - sci_out(port, SCSMR, sci_in(port, SCSMR) & ~3); - - sci_out(port, SCBRR, t); - udelay((1000000+(baud-1)) / baud); /* Wait one bit interval */ - } - - sci_init_pins(port, termios->c_cflag); - sci_out(port, SCFCR, scfcr | ((termios->c_cflag & CRTSCTS) ? SCFCR_MCE : 0)); - - sci_out(port, SCSCR, SCSCR_INIT(port)); - -#ifdef CONFIG_SERIAL_SH_SCI_DMA - /* - * Calculate delay for 1.5 DMA buffers: see - * drivers/serial/serial_core.c::uart_update_timeout(). With 10 bits - * (CS8), 250Hz, 115200 baud and 64 bytes FIFO, the above function - * calculates 1 jiffie for the data plus 5 jiffies for the "slop(e)." - * Then below we calculate 3 jiffies (12ms) for 1.5 DMA buffers (3 FIFO - * sizes), but it has been found out experimentally, that this is not - * enough: the driver too often needlessly runs on a DMA timeout. 20ms - * as a minimum seem to work perfectly. - */ - if (s->chan_rx) { - s->rx_timeout = (port->timeout - HZ / 50) * s->buf_len_rx * 3 / - port->fifosize / 2; - dev_dbg(port->dev, - "DMA Rx t-out %ums, tty t-out %u jiffies\n", - s->rx_timeout * 1000 / HZ, port->timeout); - if (s->rx_timeout < msecs_to_jiffies(20)) - s->rx_timeout = msecs_to_jiffies(20); - } -#endif - - if ((termios->c_cflag & CREAD) != 0) - sci_start_rx(port); -} - -static const char *sci_type(struct uart_port *port) -{ - switch (port->type) { - case PORT_IRDA: - return "irda"; - case PORT_SCI: - return "sci"; - case PORT_SCIF: - return "scif"; - case PORT_SCIFA: - return "scifa"; - case PORT_SCIFB: - return "scifb"; - } - - return NULL; -} - -static void sci_release_port(struct uart_port *port) -{ - /* Nothing here yet .. */ -} - -static int sci_request_port(struct uart_port *port) -{ - /* Nothing here yet .. */ - return 0; -} - -static void sci_config_port(struct uart_port *port, int flags) -{ - struct sci_port *s = to_sci_port(port); - - port->type = s->type; - - if (port->membase) - return; - - if (port->flags & UPF_IOREMAP) { - port->membase = ioremap_nocache(port->mapbase, 0x40); - - if (IS_ERR(port->membase)) - dev_err(port->dev, "can't remap port#%d\n", port->line); - } else { - /* - * For the simple (and majority of) cases where we don't - * need to do any remapping, just cast the cookie - * directly. - */ - port->membase = (void __iomem *)port->mapbase; - } -} - -static int sci_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - struct sci_port *s = to_sci_port(port); - - if (ser->irq != s->irqs[SCIx_TXI_IRQ] || ser->irq > nr_irqs) - return -EINVAL; - if (ser->baud_base < 2400) - /* No paper tape reader for Mitch.. */ - return -EINVAL; - - return 0; -} - -static struct uart_ops sci_uart_ops = { - .tx_empty = sci_tx_empty, - .set_mctrl = sci_set_mctrl, - .get_mctrl = sci_get_mctrl, - .start_tx = sci_start_tx, - .stop_tx = sci_stop_tx, - .stop_rx = sci_stop_rx, - .enable_ms = sci_enable_ms, - .break_ctl = sci_break_ctl, - .startup = sci_startup, - .shutdown = sci_shutdown, - .set_termios = sci_set_termios, - .type = sci_type, - .release_port = sci_release_port, - .request_port = sci_request_port, - .config_port = sci_config_port, - .verify_port = sci_verify_port, -#ifdef CONFIG_CONSOLE_POLL - .poll_get_char = sci_poll_get_char, - .poll_put_char = sci_poll_put_char, -#endif -}; - -static int __devinit sci_init_single(struct platform_device *dev, - struct sci_port *sci_port, - unsigned int index, - struct plat_sci_port *p) -{ - struct uart_port *port = &sci_port->port; - - port->ops = &sci_uart_ops; - port->iotype = UPIO_MEM; - port->line = index; - - switch (p->type) { - case PORT_SCIFB: - port->fifosize = 256; - break; - case PORT_SCIFA: - port->fifosize = 64; - break; - case PORT_SCIF: - port->fifosize = 16; - break; - default: - port->fifosize = 1; - break; - } - - if (dev) { - sci_port->iclk = clk_get(&dev->dev, "sci_ick"); - if (IS_ERR(sci_port->iclk)) { - sci_port->iclk = clk_get(&dev->dev, "peripheral_clk"); - if (IS_ERR(sci_port->iclk)) { - dev_err(&dev->dev, "can't get iclk\n"); - return PTR_ERR(sci_port->iclk); - } - } - - /* - * The function clock is optional, ignore it if we can't - * find it. - */ - sci_port->fclk = clk_get(&dev->dev, "sci_fck"); - if (IS_ERR(sci_port->fclk)) - sci_port->fclk = NULL; - - sci_port->enable = sci_clk_enable; - sci_port->disable = sci_clk_disable; - port->dev = &dev->dev; - } - - sci_port->break_timer.data = (unsigned long)sci_port; - sci_port->break_timer.function = sci_break_timer; - init_timer(&sci_port->break_timer); - - port->mapbase = p->mapbase; - port->membase = p->membase; - - port->irq = p->irqs[SCIx_TXI_IRQ]; - port->flags = p->flags; - sci_port->type = port->type = p->type; - -#ifdef CONFIG_SERIAL_SH_SCI_DMA - sci_port->dma_dev = p->dma_dev; - sci_port->slave_tx = p->dma_slave_tx; - sci_port->slave_rx = p->dma_slave_rx; - - dev_dbg(port->dev, "%s: DMA device %p, tx %d, rx %d\n", __func__, - p->dma_dev, p->dma_slave_tx, p->dma_slave_rx); -#endif - - memcpy(&sci_port->irqs, &p->irqs, sizeof(p->irqs)); - return 0; -} - -#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE -static struct tty_driver *serial_console_device(struct console *co, int *index) -{ - struct uart_driver *p = &sci_uart_driver; - *index = co->index; - return p->tty_driver; -} - -static void serial_console_putchar(struct uart_port *port, int ch) -{ - sci_poll_put_char(port, ch); -} - -/* - * Print a string to the serial port trying not to disturb - * any possible real use of the port... - */ -static void serial_console_write(struct console *co, const char *s, - unsigned count) -{ - struct uart_port *port = co->data; - struct sci_port *sci_port = to_sci_port(port); - unsigned short bits; - - if (sci_port->enable) - sci_port->enable(port); - - uart_console_write(port, s, count, serial_console_putchar); - - /* wait until fifo is empty and last bit has been transmitted */ - bits = SCxSR_TDxE(port) | SCxSR_TEND(port); - while ((sci_in(port, SCxSR) & bits) != bits) - cpu_relax(); - - if (sci_port->disable) - sci_port->disable(port); -} - -static int __devinit serial_console_setup(struct console *co, char *options) -{ - struct sci_port *sci_port; - struct uart_port *port; - int baud = 115200; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - int ret; - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - if (co->index >= SCI_NPORTS) - co->index = 0; - - if (co->data) { - port = co->data; - sci_port = to_sci_port(port); - } else { - sci_port = &sci_ports[co->index]; - port = &sci_port->port; - co->data = port; - } - - /* - * Also need to check port->type, we don't actually have any - * UPIO_PORT ports, but uart_report_port() handily misreports - * it anyways if we don't have a port available by the time this is - * called. - */ - if (!port->type) - return -ENODEV; - - sci_config_port(port, 0); - - if (sci_port->enable) - sci_port->enable(port); - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - ret = uart_set_options(port, co, baud, parity, bits, flow); -#if defined(__H8300H__) || defined(__H8300S__) - /* disable rx interrupt */ - if (ret == 0) - sci_stop_rx(port); -#endif - /* TODO: disable clock */ - return ret; -} - -static struct console serial_console = { - .name = "ttySC", - .device = serial_console_device, - .write = serial_console_write, - .setup = serial_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, -}; - -static int __init sci_console_init(void) -{ - register_console(&serial_console); - return 0; -} -console_initcall(sci_console_init); - -static struct sci_port early_serial_port; -static struct console early_serial_console = { - .name = "early_ttySC", - .write = serial_console_write, - .flags = CON_PRINTBUFFER, -}; -static char early_serial_buf[32]; - -#endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */ - -#if defined(CONFIG_SERIAL_SH_SCI_CONSOLE) -#define SCI_CONSOLE (&serial_console) -#else -#define SCI_CONSOLE 0 -#endif - -static char banner[] __initdata = - KERN_INFO "SuperH SCI(F) driver initialized\n"; - -static struct uart_driver sci_uart_driver = { - .owner = THIS_MODULE, - .driver_name = "sci", - .dev_name = "ttySC", - .major = SCI_MAJOR, - .minor = SCI_MINOR_START, - .nr = SCI_NPORTS, - .cons = SCI_CONSOLE, -}; - - -static int sci_remove(struct platform_device *dev) -{ - struct sh_sci_priv *priv = platform_get_drvdata(dev); - struct sci_port *p; - unsigned long flags; - - cpufreq_unregister_notifier(&priv->clk_nb, CPUFREQ_TRANSITION_NOTIFIER); - - spin_lock_irqsave(&priv->lock, flags); - list_for_each_entry(p, &priv->ports, node) { - uart_remove_one_port(&sci_uart_driver, &p->port); - clk_put(p->iclk); - clk_put(p->fclk); - } - spin_unlock_irqrestore(&priv->lock, flags); - - kfree(priv); - return 0; -} - -static int __devinit sci_probe_single(struct platform_device *dev, - unsigned int index, - struct plat_sci_port *p, - struct sci_port *sciport) -{ - struct sh_sci_priv *priv = platform_get_drvdata(dev); - unsigned long flags; - int ret; - - /* Sanity check */ - if (unlikely(index >= SCI_NPORTS)) { - dev_notice(&dev->dev, "Attempting to register port " - "%d when only %d are available.\n", - index+1, SCI_NPORTS); - dev_notice(&dev->dev, "Consider bumping " - "CONFIG_SERIAL_SH_SCI_NR_UARTS!\n"); - return 0; - } - - ret = sci_init_single(dev, sciport, index, p); - if (ret) - return ret; - - ret = uart_add_one_port(&sci_uart_driver, &sciport->port); - if (ret) - return ret; - - INIT_LIST_HEAD(&sciport->node); - - spin_lock_irqsave(&priv->lock, flags); - list_add(&sciport->node, &priv->ports); - spin_unlock_irqrestore(&priv->lock, flags); - - return 0; -} - -/* - * Register a set of serial devices attached to a platform device. The - * list is terminated with a zero flags entry, which means we expect - * all entries to have at least UPF_BOOT_AUTOCONF set. Platforms that need - * remapping (such as sh64) should also set UPF_IOREMAP. - */ -static int __devinit sci_probe(struct platform_device *dev) -{ - struct plat_sci_port *p = dev->dev.platform_data; - struct sh_sci_priv *priv; - int i, ret = -EINVAL; - -#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE - if (is_early_platform_device(dev)) { - if (dev->id == -1) - return -ENOTSUPP; - early_serial_console.index = dev->id; - early_serial_console.data = &early_serial_port.port; - sci_init_single(NULL, &early_serial_port, dev->id, p); - serial_console_setup(&early_serial_console, early_serial_buf); - if (!strstr(early_serial_buf, "keep")) - early_serial_console.flags |= CON_BOOT; - register_console(&early_serial_console); - return 0; - } -#endif - - priv = kzalloc(sizeof(*priv), GFP_KERNEL); - if (!priv) - return -ENOMEM; - - INIT_LIST_HEAD(&priv->ports); - spin_lock_init(&priv->lock); - platform_set_drvdata(dev, priv); - - priv->clk_nb.notifier_call = sci_notifier; - cpufreq_register_notifier(&priv->clk_nb, CPUFREQ_TRANSITION_NOTIFIER); - - if (dev->id != -1) { - ret = sci_probe_single(dev, dev->id, p, &sci_ports[dev->id]); - if (ret) - goto err_unreg; - } else { - for (i = 0; p && p->flags != 0; p++, i++) { - ret = sci_probe_single(dev, i, p, &sci_ports[i]); - if (ret) - goto err_unreg; - } - } - -#ifdef CONFIG_SH_STANDARD_BIOS - sh_bios_gdb_detach(); -#endif - - return 0; - -err_unreg: - sci_remove(dev); - return ret; -} - -static int sci_suspend(struct device *dev) -{ - struct sh_sci_priv *priv = dev_get_drvdata(dev); - struct sci_port *p; - unsigned long flags; - - spin_lock_irqsave(&priv->lock, flags); - list_for_each_entry(p, &priv->ports, node) - uart_suspend_port(&sci_uart_driver, &p->port); - spin_unlock_irqrestore(&priv->lock, flags); - - return 0; -} - -static int sci_resume(struct device *dev) -{ - struct sh_sci_priv *priv = dev_get_drvdata(dev); - struct sci_port *p; - unsigned long flags; - - spin_lock_irqsave(&priv->lock, flags); - list_for_each_entry(p, &priv->ports, node) - uart_resume_port(&sci_uart_driver, &p->port); - spin_unlock_irqrestore(&priv->lock, flags); - - return 0; -} - -static const struct dev_pm_ops sci_dev_pm_ops = { - .suspend = sci_suspend, - .resume = sci_resume, -}; - -static struct platform_driver sci_driver = { - .probe = sci_probe, - .remove = sci_remove, - .driver = { - .name = "sh-sci", - .owner = THIS_MODULE, - .pm = &sci_dev_pm_ops, - }, -}; - -static int __init sci_init(void) -{ - int ret; - - printk(banner); - - ret = uart_register_driver(&sci_uart_driver); - if (likely(ret == 0)) { - ret = platform_driver_register(&sci_driver); - if (unlikely(ret)) - uart_unregister_driver(&sci_uart_driver); - } - - return ret; -} - -static void __exit sci_exit(void) -{ - platform_driver_unregister(&sci_driver); - uart_unregister_driver(&sci_uart_driver); -} - -#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE -early_platform_init_buffer("earlyprintk", &sci_driver, - early_serial_buf, ARRAY_SIZE(early_serial_buf)); -#endif -module_init(sci_init); -module_exit(sci_exit); - -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:sh-sci"); diff --git a/drivers/serial/sh-sci.h b/drivers/serial/sh-sci.h deleted file mode 100644 index 4bc614e4221c..000000000000 --- a/drivers/serial/sh-sci.h +++ /dev/null @@ -1,660 +0,0 @@ -#include <linux/serial_core.h> -#include <linux/io.h> -#include <linux/gpio.h> - -#if defined(CONFIG_H83007) || defined(CONFIG_H83068) -#include <asm/regs306x.h> -#endif -#if defined(CONFIG_H8S2678) -#include <asm/regs267x.h> -#endif - -#if defined(CONFIG_CPU_SUBTYPE_SH7706) || \ - defined(CONFIG_CPU_SUBTYPE_SH7707) || \ - defined(CONFIG_CPU_SUBTYPE_SH7708) || \ - defined(CONFIG_CPU_SUBTYPE_SH7709) -# define SCPCR 0xA4000116 /* 16 bit SCI and SCIF */ -# define SCPDR 0xA4000136 /* 8 bit SCI and SCIF */ -# define SCSCR_INIT(port) 0x30 /* TIE=0,RIE=0,TE=1,RE=1 */ -#elif defined(CONFIG_CPU_SUBTYPE_SH7705) -# define SCIF0 0xA4400000 -# define SCIF2 0xA4410000 -# define SCSMR_Ir 0xA44A0000 -# define IRDA_SCIF SCIF0 -# define SCPCR 0xA4000116 -# define SCPDR 0xA4000136 - -/* Set the clock source, - * SCIF2 (0xA4410000) -> External clock, SCK pin used as clock input - * SCIF0 (0xA4400000) -> Internal clock, SCK pin as serial clock output - */ -# define SCSCR_INIT(port) (port->mapbase == SCIF2) ? 0xF3 : 0xF0 -#elif defined(CONFIG_CPU_SUBTYPE_SH7720) || \ - defined(CONFIG_CPU_SUBTYPE_SH7721) || \ - defined(CONFIG_ARCH_SH73A0) || \ - defined(CONFIG_ARCH_SH7367) || \ - defined(CONFIG_ARCH_SH7377) || \ - defined(CONFIG_ARCH_SH7372) -# define SCSCR_INIT(port) 0x0030 /* TIE=0,RIE=0,TE=1,RE=1 */ -# define PORT_PTCR 0xA405011EUL -# define PORT_PVCR 0xA4050122UL -# define SCIF_ORER 0x0200 /* overrun error bit */ -#elif defined(CONFIG_SH_RTS7751R2D) -# define SCSPTR1 0xFFE0001C /* 8 bit SCIF */ -# define SCSPTR2 0xFFE80020 /* 16 bit SCIF */ -# define SCIF_ORER 0x0001 /* overrun error bit */ -# define SCSCR_INIT(port) 0x3a /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */ -#elif defined(CONFIG_CPU_SUBTYPE_SH7750) || \ - defined(CONFIG_CPU_SUBTYPE_SH7750R) || \ - defined(CONFIG_CPU_SUBTYPE_SH7750S) || \ - defined(CONFIG_CPU_SUBTYPE_SH7091) || \ - defined(CONFIG_CPU_SUBTYPE_SH7751) || \ - defined(CONFIG_CPU_SUBTYPE_SH7751R) -# define SCSPTR1 0xffe0001c /* 8 bit SCI */ -# define SCSPTR2 0xFFE80020 /* 16 bit SCIF */ -# define SCIF_ORER 0x0001 /* overrun error bit */ -# define SCSCR_INIT(port) (((port)->type == PORT_SCI) ? \ - 0x30 /* TIE=0,RIE=0,TE=1,RE=1 */ : \ - 0x38 /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */ ) -#elif defined(CONFIG_CPU_SUBTYPE_SH7760) -# define SCSPTR0 0xfe600024 /* 16 bit SCIF */ -# define SCSPTR1 0xfe610024 /* 16 bit SCIF */ -# define SCSPTR2 0xfe620024 /* 16 bit SCIF */ -# define SCIF_ORER 0x0001 /* overrun error bit */ -# define SCSCR_INIT(port) 0x38 /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */ -#elif defined(CONFIG_CPU_SUBTYPE_SH7710) || defined(CONFIG_CPU_SUBTYPE_SH7712) -# define SCSPTR0 0xA4400000 /* 16 bit SCIF */ -# define SCIF_ORER 0x0001 /* overrun error bit */ -# define PACR 0xa4050100 -# define PBCR 0xa4050102 -# define SCSCR_INIT(port) 0x3B -#elif defined(CONFIG_CPU_SUBTYPE_SH7343) -# define SCSPTR0 0xffe00010 /* 16 bit SCIF */ -# define SCSPTR1 0xffe10010 /* 16 bit SCIF */ -# define SCSPTR2 0xffe20010 /* 16 bit SCIF */ -# define SCSPTR3 0xffe30010 /* 16 bit SCIF */ -# define SCSCR_INIT(port) 0x32 /* TIE=0,RIE=0,TE=1,RE=1,REIE=0,CKE=1 */ -#elif defined(CONFIG_CPU_SUBTYPE_SH7722) -# define PADR 0xA4050120 -# define PSDR 0xA405013e -# define PWDR 0xA4050166 -# define PSCR 0xA405011E -# define SCIF_ORER 0x0001 /* overrun error bit */ -# define SCSCR_INIT(port) 0x0038 /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */ -#elif defined(CONFIG_CPU_SUBTYPE_SH7366) -# define SCPDR0 0xA405013E /* 16 bit SCIF0 PSDR */ -# define SCSPTR0 SCPDR0 -# define SCIF_ORER 0x0001 /* overrun error bit */ -# define SCSCR_INIT(port) 0x0038 /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */ -#elif defined(CONFIG_CPU_SUBTYPE_SH7723) -# define SCSPTR0 0xa4050160 -# define SCSPTR1 0xa405013e -# define SCSPTR2 0xa4050160 -# define SCSPTR3 0xa405013e -# define SCSPTR4 0xa4050128 -# define SCSPTR5 0xa4050128 -# define SCIF_ORER 0x0001 /* overrun error bit */ -# define SCSCR_INIT(port) 0x0038 /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */ -#elif defined(CONFIG_CPU_SUBTYPE_SH7724) -# define SCIF_ORER 0x0001 /* overrun error bit */ -# define SCSCR_INIT(port) ((port)->type == PORT_SCIFA ? \ - 0x30 /* TIE=0,RIE=0,TE=1,RE=1 */ : \ - 0x38 /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */ ) -#elif defined(CONFIG_CPU_SUBTYPE_SH4_202) -# define SCSPTR2 0xffe80020 /* 16 bit SCIF */ -# define SCIF_ORER 0x0001 /* overrun error bit */ -# define SCSCR_INIT(port) 0x38 /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */ -#elif defined(CONFIG_CPU_SUBTYPE_SH5_101) || defined(CONFIG_CPU_SUBTYPE_SH5_103) -# define SCIF_BASE_ADDR 0x01030000 -# define SCIF_ADDR_SH5 PHYS_PERIPHERAL_BLOCK+SCIF_BASE_ADDR -# define SCIF_PTR2_OFFS 0x0000020 -# define SCIF_LSR2_OFFS 0x0000024 -# define SCSPTR2 ((port->mapbase)+SCIF_PTR2_OFFS) /* 16 bit SCIF */ -# define SCLSR2 ((port->mapbase)+SCIF_LSR2_OFFS) /* 16 bit SCIF */ -# define SCSCR_INIT(port) 0x38 /* TIE=0,RIE=0, TE=1,RE=1,REIE=1 */ -#elif defined(CONFIG_H83007) || defined(CONFIG_H83068) -# define SCSCR_INIT(port) 0x30 /* TIE=0,RIE=0,TE=1,RE=1 */ -# define H8300_SCI_DR(ch) *(volatile char *)(P1DR + h8300_sci_pins[ch].port) -#elif defined(CONFIG_H8S2678) -# define SCSCR_INIT(port) 0x30 /* TIE=0,RIE=0,TE=1,RE=1 */ -# define H8300_SCI_DR(ch) *(volatile char *)(P1DR + h8300_sci_pins[ch].port) -#elif defined(CONFIG_CPU_SUBTYPE_SH7757) -# define SCSPTR0 0xfe4b0020 -# define SCSPTR1 0xfe4b0020 -# define SCSPTR2 0xfe4b0020 -# define SCIF_ORER 0x0001 -# define SCSCR_INIT(port) 0x38 -# define SCIF_ONLY -#elif defined(CONFIG_CPU_SUBTYPE_SH7763) -# define SCSPTR0 0xffe00024 /* 16 bit SCIF */ -# define SCSPTR1 0xffe08024 /* 16 bit SCIF */ -# define SCSPTR2 0xffe10020 /* 16 bit SCIF/IRDA */ -# define SCIF_ORER 0x0001 /* overrun error bit */ -# define SCSCR_INIT(port) 0x38 /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */ -#elif defined(CONFIG_CPU_SUBTYPE_SH7770) -# define SCSPTR0 0xff923020 /* 16 bit SCIF */ -# define SCSPTR1 0xff924020 /* 16 bit SCIF */ -# define SCSPTR2 0xff925020 /* 16 bit SCIF */ -# define SCIF_ORER 0x0001 /* overrun error bit */ -# define SCSCR_INIT(port) 0x3c /* TIE=0,RIE=0,TE=1,RE=1,REIE=1,cke=2 */ -#elif defined(CONFIG_CPU_SUBTYPE_SH7780) -# define SCSPTR0 0xffe00024 /* 16 bit SCIF */ -# define SCSPTR1 0xffe10024 /* 16 bit SCIF */ -# define SCIF_ORER 0x0001 /* Overrun error bit */ - -#if defined(CONFIG_SH_SH2007) -/* TIE=0,RIE=0,TE=1,RE=1,REIE=1,CKE1=0 */ -# define SCSCR_INIT(port) 0x38 -#else -/* TIE=0,RIE=0,TE=1,RE=1,REIE=1,CKE1=1 */ -# define SCSCR_INIT(port) 0x3a -#endif - -#elif defined(CONFIG_CPU_SUBTYPE_SH7785) || \ - defined(CONFIG_CPU_SUBTYPE_SH7786) -# define SCSPTR0 0xffea0024 /* 16 bit SCIF */ -# define SCSPTR1 0xffeb0024 /* 16 bit SCIF */ -# define SCSPTR2 0xffec0024 /* 16 bit SCIF */ -# define SCSPTR3 0xffed0024 /* 16 bit SCIF */ -# define SCSPTR4 0xffee0024 /* 16 bit SCIF */ -# define SCSPTR5 0xffef0024 /* 16 bit SCIF */ -# define SCIF_ORER 0x0001 /* Overrun error bit */ -# define SCSCR_INIT(port) 0x3a /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */ -#elif defined(CONFIG_CPU_SUBTYPE_SH7201) || \ - defined(CONFIG_CPU_SUBTYPE_SH7203) || \ - defined(CONFIG_CPU_SUBTYPE_SH7206) || \ - defined(CONFIG_CPU_SUBTYPE_SH7263) -# define SCSPTR0 0xfffe8020 /* 16 bit SCIF */ -# define SCSPTR1 0xfffe8820 /* 16 bit SCIF */ -# define SCSPTR2 0xfffe9020 /* 16 bit SCIF */ -# define SCSPTR3 0xfffe9820 /* 16 bit SCIF */ -# if defined(CONFIG_CPU_SUBTYPE_SH7201) -# define SCSPTR4 0xfffeA020 /* 16 bit SCIF */ -# define SCSPTR5 0xfffeA820 /* 16 bit SCIF */ -# define SCSPTR6 0xfffeB020 /* 16 bit SCIF */ -# define SCSPTR7 0xfffeB820 /* 16 bit SCIF */ -# endif -# define SCSCR_INIT(port) 0x38 /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */ -#elif defined(CONFIG_CPU_SUBTYPE_SH7619) -# define SCSPTR0 0xf8400020 /* 16 bit SCIF */ -# define SCSPTR1 0xf8410020 /* 16 bit SCIF */ -# define SCSPTR2 0xf8420020 /* 16 bit SCIF */ -# define SCIF_ORER 0x0001 /* overrun error bit */ -# define SCSCR_INIT(port) 0x38 /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */ -#elif defined(CONFIG_CPU_SUBTYPE_SHX3) -# define SCSPTR0 0xffc30020 /* 16 bit SCIF */ -# define SCSPTR1 0xffc40020 /* 16 bit SCIF */ -# define SCSPTR2 0xffc50020 /* 16 bit SCIF */ -# define SCSPTR3 0xffc60020 /* 16 bit SCIF */ -# define SCIF_ORER 0x0001 /* Overrun error bit */ -# define SCSCR_INIT(port) 0x38 /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */ -#else -# error CPU subtype not defined -#endif - -/* SCSCR */ -#define SCI_CTRL_FLAGS_TIE 0x80 /* all */ -#define SCI_CTRL_FLAGS_RIE 0x40 /* all */ -#define SCI_CTRL_FLAGS_TE 0x20 /* all */ -#define SCI_CTRL_FLAGS_RE 0x10 /* all */ -#if defined(CONFIG_CPU_SUBTYPE_SH7750) || \ - defined(CONFIG_CPU_SUBTYPE_SH7091) || \ - defined(CONFIG_CPU_SUBTYPE_SH7750R) || \ - defined(CONFIG_CPU_SUBTYPE_SH7722) || \ - defined(CONFIG_CPU_SUBTYPE_SH7750S) || \ - defined(CONFIG_CPU_SUBTYPE_SH7751) || \ - defined(CONFIG_CPU_SUBTYPE_SH7751R) || \ - defined(CONFIG_CPU_SUBTYPE_SH7763) || \ - defined(CONFIG_CPU_SUBTYPE_SH7780) || \ - defined(CONFIG_CPU_SUBTYPE_SH7785) || \ - defined(CONFIG_CPU_SUBTYPE_SH7786) || \ - defined(CONFIG_CPU_SUBTYPE_SHX3) -#define SCI_CTRL_FLAGS_REIE 0x08 /* 7750 SCIF */ -#elif defined(CONFIG_CPU_SUBTYPE_SH7724) -#define SCI_CTRL_FLAGS_REIE ((port)->type == PORT_SCIFA ? 0 : 8) -#else -#define SCI_CTRL_FLAGS_REIE 0 -#endif -/* SCI_CTRL_FLAGS_MPIE 0x08 * 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */ -/* SCI_CTRL_FLAGS_TEIE 0x04 * 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */ -/* SCI_CTRL_FLAGS_CKE1 0x02 * all */ -/* SCI_CTRL_FLAGS_CKE0 0x01 * 7707 SCI/SCIF, 7708 SCI, 7709 SCI/SCIF, 7750 SCI */ - -/* SCxSR SCI */ -#define SCI_TDRE 0x80 /* 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */ -#define SCI_RDRF 0x40 /* 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */ -#define SCI_ORER 0x20 /* 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */ -#define SCI_FER 0x10 /* 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */ -#define SCI_PER 0x08 /* 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */ -#define SCI_TEND 0x04 /* 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */ -/* SCI_MPB 0x02 * 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */ -/* SCI_MPBT 0x01 * 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */ - -#define SCI_ERRORS ( SCI_PER | SCI_FER | SCI_ORER) - -/* SCxSR SCIF */ -#define SCIF_ER 0x0080 /* 7705 SCIF, 7707 SCIF, 7709 SCIF, 7750 SCIF */ -#define SCIF_TEND 0x0040 /* 7705 SCIF, 7707 SCIF, 7709 SCIF, 7750 SCIF */ -#define SCIF_TDFE 0x0020 /* 7705 SCIF, 7707 SCIF, 7709 SCIF, 7750 SCIF */ -#define SCIF_BRK 0x0010 /* 7705 SCIF, 7707 SCIF, 7709 SCIF, 7750 SCIF */ -#define SCIF_FER 0x0008 /* 7705 SCIF, 7707 SCIF, 7709 SCIF, 7750 SCIF */ -#define SCIF_PER 0x0004 /* 7705 SCIF, 7707 SCIF, 7709 SCIF, 7750 SCIF */ -#define SCIF_RDF 0x0002 /* 7705 SCIF, 7707 SCIF, 7709 SCIF, 7750 SCIF */ -#define SCIF_DR 0x0001 /* 7705 SCIF, 7707 SCIF, 7709 SCIF, 7750 SCIF */ - -#if defined(CONFIG_CPU_SUBTYPE_SH7705) || \ - defined(CONFIG_CPU_SUBTYPE_SH7720) || \ - defined(CONFIG_CPU_SUBTYPE_SH7721) || \ - defined(CONFIG_ARCH_SH73A0) || \ - defined(CONFIG_ARCH_SH7367) || \ - defined(CONFIG_ARCH_SH7377) || \ - defined(CONFIG_ARCH_SH7372) -# define SCIF_ORER 0x0200 -# define SCIF_ERRORS ( SCIF_PER | SCIF_FER | SCIF_ER | SCIF_BRK | SCIF_ORER) -# define SCIF_RFDC_MASK 0x007f -# define SCIF_TXROOM_MAX 64 -#elif defined(CONFIG_CPU_SUBTYPE_SH7763) -# define SCIF_ERRORS ( SCIF_PER | SCIF_FER | SCIF_ER | SCIF_BRK ) -# define SCIF_RFDC_MASK 0x007f -# define SCIF_TXROOM_MAX 64 -/* SH7763 SCIF2 support */ -# define SCIF2_RFDC_MASK 0x001f -# define SCIF2_TXROOM_MAX 16 -#else -# define SCIF_ERRORS ( SCIF_PER | SCIF_FER | SCIF_ER | SCIF_BRK) -# define SCIF_RFDC_MASK 0x001f -# define SCIF_TXROOM_MAX 16 -#endif - -#ifndef SCIF_ORER -#define SCIF_ORER 0x0000 -#endif - -#define SCxSR_TEND(port) (((port)->type == PORT_SCI) ? SCI_TEND : SCIF_TEND) -#define SCxSR_ERRORS(port) (((port)->type == PORT_SCI) ? SCI_ERRORS : SCIF_ERRORS) -#define SCxSR_RDxF(port) (((port)->type == PORT_SCI) ? SCI_RDRF : SCIF_RDF) -#define SCxSR_TDxE(port) (((port)->type == PORT_SCI) ? SCI_TDRE : SCIF_TDFE) -#define SCxSR_FER(port) (((port)->type == PORT_SCI) ? SCI_FER : SCIF_FER) -#define SCxSR_PER(port) (((port)->type == PORT_SCI) ? SCI_PER : SCIF_PER) -#define SCxSR_BRK(port) (((port)->type == PORT_SCI) ? 0x00 : SCIF_BRK) -#define SCxSR_ORER(port) (((port)->type == PORT_SCI) ? SCI_ORER : SCIF_ORER) - -#if defined(CONFIG_CPU_SUBTYPE_SH7705) || \ - defined(CONFIG_CPU_SUBTYPE_SH7720) || \ - defined(CONFIG_CPU_SUBTYPE_SH7721) || \ - defined(CONFIG_ARCH_SH73A0) || \ - defined(CONFIG_ARCH_SH7367) || \ - defined(CONFIG_ARCH_SH7377) || \ - defined(CONFIG_ARCH_SH7372) -# define SCxSR_RDxF_CLEAR(port) (sci_in(port, SCxSR) & 0xfffc) -# define SCxSR_ERROR_CLEAR(port) (sci_in(port, SCxSR) & 0xfd73) -# define SCxSR_TDxE_CLEAR(port) (sci_in(port, SCxSR) & 0xffdf) -# define SCxSR_BREAK_CLEAR(port) (sci_in(port, SCxSR) & 0xffe3) -#else -# define SCxSR_RDxF_CLEAR(port) (((port)->type == PORT_SCI) ? 0xbc : 0x00fc) -# define SCxSR_ERROR_CLEAR(port) (((port)->type == PORT_SCI) ? 0xc4 : 0x0073) -# define SCxSR_TDxE_CLEAR(port) (((port)->type == PORT_SCI) ? 0x78 : 0x00df) -# define SCxSR_BREAK_CLEAR(port) (((port)->type == PORT_SCI) ? 0xc4 : 0x00e3) -#endif - -/* SCFCR */ -#define SCFCR_RFRST 0x0002 -#define SCFCR_TFRST 0x0004 -#define SCFCR_TCRST 0x4000 -#define SCFCR_MCE 0x0008 - -#define SCI_MAJOR 204 -#define SCI_MINOR_START 8 - -/* Generic serial flags */ -#define SCI_RX_THROTTLE 0x0000001 - -#define SCI_MAGIC 0xbabeface - -/* - * Events are used to schedule things to happen at timer-interrupt - * time, instead of at rs interrupt time. - */ -#define SCI_EVENT_WRITE_WAKEUP 0 - -#define SCI_IN(size, offset) \ - if ((size) == 8) { \ - return ioread8(port->membase + (offset)); \ - } else { \ - return ioread16(port->membase + (offset)); \ - } -#define SCI_OUT(size, offset, value) \ - if ((size) == 8) { \ - iowrite8(value, port->membase + (offset)); \ - } else if ((size) == 16) { \ - iowrite16(value, port->membase + (offset)); \ - } - -#define CPU_SCIx_FNS(name, sci_offset, sci_size, scif_offset, scif_size)\ - static inline unsigned int sci_##name##_in(struct uart_port *port) \ - { \ - if (port->type == PORT_SCIF || port->type == PORT_SCIFB) { \ - SCI_IN(scif_size, scif_offset) \ - } else { /* PORT_SCI or PORT_SCIFA */ \ - SCI_IN(sci_size, sci_offset); \ - } \ - } \ - static inline void sci_##name##_out(struct uart_port *port, unsigned int value) \ - { \ - if (port->type == PORT_SCIF || port->type == PORT_SCIFB) { \ - SCI_OUT(scif_size, scif_offset, value) \ - } else { /* PORT_SCI or PORT_SCIFA */ \ - SCI_OUT(sci_size, sci_offset, value); \ - } \ - } - -#ifdef CONFIG_H8300 -/* h8300 don't have SCIF */ -#define CPU_SCIF_FNS(name) \ - static inline unsigned int sci_##name##_in(struct uart_port *port) \ - { \ - return 0; \ - } \ - static inline void sci_##name##_out(struct uart_port *port, unsigned int value) \ - { \ - } -#else -#define CPU_SCIF_FNS(name, scif_offset, scif_size) \ - static inline unsigned int sci_##name##_in(struct uart_port *port) \ - { \ - SCI_IN(scif_size, scif_offset); \ - } \ - static inline void sci_##name##_out(struct uart_port *port, unsigned int value) \ - { \ - SCI_OUT(scif_size, scif_offset, value); \ - } -#endif - -#define CPU_SCI_FNS(name, sci_offset, sci_size) \ - static inline unsigned int sci_##name##_in(struct uart_port* port) \ - { \ - SCI_IN(sci_size, sci_offset); \ - } \ - static inline void sci_##name##_out(struct uart_port* port, unsigned int value) \ - { \ - SCI_OUT(sci_size, sci_offset, value); \ - } - -#if defined(CONFIG_CPU_SH3) || \ - defined(CONFIG_ARCH_SH73A0) || \ - defined(CONFIG_ARCH_SH7367) || \ - defined(CONFIG_ARCH_SH7377) || \ - defined(CONFIG_ARCH_SH7372) -#if defined(CONFIG_CPU_SUBTYPE_SH7710) || defined(CONFIG_CPU_SUBTYPE_SH7712) -#define SCIx_FNS(name, sh3_sci_offset, sh3_sci_size, sh4_sci_offset, sh4_sci_size, \ - sh3_scif_offset, sh3_scif_size, sh4_scif_offset, sh4_scif_size, \ - h8_sci_offset, h8_sci_size) \ - CPU_SCIx_FNS(name, sh4_sci_offset, sh4_sci_size, sh4_scif_offset, sh4_scif_size) -#define SCIF_FNS(name, sh3_scif_offset, sh3_scif_size, sh4_scif_offset, sh4_scif_size) \ - CPU_SCIF_FNS(name, sh4_scif_offset, sh4_scif_size) -#elif defined(CONFIG_CPU_SUBTYPE_SH7705) || \ - defined(CONFIG_CPU_SUBTYPE_SH7720) || \ - defined(CONFIG_CPU_SUBTYPE_SH7721) || \ - defined(CONFIG_ARCH_SH73A0) || \ - defined(CONFIG_ARCH_SH7367) || \ - defined(CONFIG_ARCH_SH7377) -#define SCIF_FNS(name, scif_offset, scif_size) \ - CPU_SCIF_FNS(name, scif_offset, scif_size) -#elif defined(CONFIG_ARCH_SH7372) -#define SCIx_FNS(name, sh4_scifa_offset, sh4_scifa_size, sh4_scifb_offset, sh4_scifb_size) \ - CPU_SCIx_FNS(name, sh4_scifa_offset, sh4_scifa_size, sh4_scifb_offset, sh4_scifb_size) -#define SCIF_FNS(name, scif_offset, scif_size) \ - CPU_SCIF_FNS(name, scif_offset, scif_size) -#else -#define SCIx_FNS(name, sh3_sci_offset, sh3_sci_size, sh4_sci_offset, sh4_sci_size, \ - sh3_scif_offset, sh3_scif_size, sh4_scif_offset, sh4_scif_size, \ - h8_sci_offset, h8_sci_size) \ - CPU_SCIx_FNS(name, sh3_sci_offset, sh3_sci_size, sh3_scif_offset, sh3_scif_size) -#define SCIF_FNS(name, sh3_scif_offset, sh3_scif_size, sh4_scif_offset, sh4_scif_size) \ - CPU_SCIF_FNS(name, sh3_scif_offset, sh3_scif_size) -#endif -#elif defined(__H8300H__) || defined(__H8300S__) -#define SCIx_FNS(name, sh3_sci_offset, sh3_sci_size, sh4_sci_offset, sh4_sci_size, \ - sh3_scif_offset, sh3_scif_size, sh4_scif_offset, sh4_scif_size, \ - h8_sci_offset, h8_sci_size) \ - CPU_SCI_FNS(name, h8_sci_offset, h8_sci_size) -#define SCIF_FNS(name, sh3_scif_offset, sh3_scif_size, sh4_scif_offset, sh4_scif_size) \ - CPU_SCIF_FNS(name) -#elif defined(CONFIG_CPU_SUBTYPE_SH7723) ||\ - defined(CONFIG_CPU_SUBTYPE_SH7724) - #define SCIx_FNS(name, sh4_scifa_offset, sh4_scifa_size, sh4_scif_offset, sh4_scif_size) \ - CPU_SCIx_FNS(name, sh4_scifa_offset, sh4_scifa_size, sh4_scif_offset, sh4_scif_size) - #define SCIF_FNS(name, sh4_scif_offset, sh4_scif_size) \ - CPU_SCIF_FNS(name, sh4_scif_offset, sh4_scif_size) -#else -#define SCIx_FNS(name, sh3_sci_offset, sh3_sci_size, sh4_sci_offset, sh4_sci_size, \ - sh3_scif_offset, sh3_scif_size, sh4_scif_offset, sh4_scif_size, \ - h8_sci_offset, h8_sci_size) \ - CPU_SCIx_FNS(name, sh4_sci_offset, sh4_sci_size, sh4_scif_offset, sh4_scif_size) -#define SCIF_FNS(name, sh3_scif_offset, sh3_scif_size, sh4_scif_offset, sh4_scif_size) \ - CPU_SCIF_FNS(name, sh4_scif_offset, sh4_scif_size) -#endif - -#if defined(CONFIG_CPU_SUBTYPE_SH7705) || \ - defined(CONFIG_CPU_SUBTYPE_SH7720) || \ - defined(CONFIG_CPU_SUBTYPE_SH7721) || \ - defined(CONFIG_ARCH_SH73A0) || \ - defined(CONFIG_ARCH_SH7367) || \ - defined(CONFIG_ARCH_SH7377) - -SCIF_FNS(SCSMR, 0x00, 16) -SCIF_FNS(SCBRR, 0x04, 8) -SCIF_FNS(SCSCR, 0x08, 16) -SCIF_FNS(SCTDSR, 0x0c, 8) -SCIF_FNS(SCFER, 0x10, 16) -SCIF_FNS(SCxSR, 0x14, 16) -SCIF_FNS(SCFCR, 0x18, 16) -SCIF_FNS(SCFDR, 0x1c, 16) -SCIF_FNS(SCxTDR, 0x20, 8) -SCIF_FNS(SCxRDR, 0x24, 8) -SCIF_FNS(SCLSR, 0x00, 0) -#elif defined(CONFIG_ARCH_SH7372) -SCIF_FNS(SCSMR, 0x00, 16) -SCIF_FNS(SCBRR, 0x04, 8) -SCIF_FNS(SCSCR, 0x08, 16) -SCIF_FNS(SCTDSR, 0x0c, 16) -SCIF_FNS(SCFER, 0x10, 16) -SCIF_FNS(SCxSR, 0x14, 16) -SCIF_FNS(SCFCR, 0x18, 16) -SCIF_FNS(SCFDR, 0x1c, 16) -SCIF_FNS(SCTFDR, 0x38, 16) -SCIF_FNS(SCRFDR, 0x3c, 16) -SCIx_FNS(SCxTDR, 0x20, 8, 0x40, 8) -SCIx_FNS(SCxRDR, 0x24, 8, 0x60, 8) -SCIF_FNS(SCLSR, 0x00, 0) -#elif defined(CONFIG_CPU_SUBTYPE_SH7723) ||\ - defined(CONFIG_CPU_SUBTYPE_SH7724) -SCIx_FNS(SCSMR, 0x00, 16, 0x00, 16) -SCIx_FNS(SCBRR, 0x04, 8, 0x04, 8) -SCIx_FNS(SCSCR, 0x08, 16, 0x08, 16) -SCIx_FNS(SCxTDR, 0x20, 8, 0x0c, 8) -SCIx_FNS(SCxSR, 0x14, 16, 0x10, 16) -SCIx_FNS(SCxRDR, 0x24, 8, 0x14, 8) -SCIx_FNS(SCSPTR, 0, 0, 0, 0) -SCIF_FNS(SCTDSR, 0x0c, 8) -SCIF_FNS(SCFER, 0x10, 16) -SCIF_FNS(SCFCR, 0x18, 16) -SCIF_FNS(SCFDR, 0x1c, 16) -SCIF_FNS(SCLSR, 0x24, 16) -#else -/* reg SCI/SH3 SCI/SH4 SCIF/SH3 SCIF/SH4 SCI/H8*/ -/* name off sz off sz off sz off sz off sz*/ -SCIx_FNS(SCSMR, 0x00, 8, 0x00, 8, 0x00, 8, 0x00, 16, 0x00, 8) -SCIx_FNS(SCBRR, 0x02, 8, 0x04, 8, 0x02, 8, 0x04, 8, 0x01, 8) -SCIx_FNS(SCSCR, 0x04, 8, 0x08, 8, 0x04, 8, 0x08, 16, 0x02, 8) -SCIx_FNS(SCxTDR, 0x06, 8, 0x0c, 8, 0x06, 8, 0x0C, 8, 0x03, 8) -SCIx_FNS(SCxSR, 0x08, 8, 0x10, 8, 0x08, 16, 0x10, 16, 0x04, 8) -SCIx_FNS(SCxRDR, 0x0a, 8, 0x14, 8, 0x0A, 8, 0x14, 8, 0x05, 8) -SCIF_FNS(SCFCR, 0x0c, 8, 0x18, 16) -#if defined(CONFIG_CPU_SUBTYPE_SH7760) || \ - defined(CONFIG_CPU_SUBTYPE_SH7780) || \ - defined(CONFIG_CPU_SUBTYPE_SH7785) || \ - defined(CONFIG_CPU_SUBTYPE_SH7786) -SCIF_FNS(SCFDR, 0x0e, 16, 0x1C, 16) -SCIF_FNS(SCTFDR, 0x0e, 16, 0x1C, 16) -SCIF_FNS(SCRFDR, 0x0e, 16, 0x20, 16) -SCIF_FNS(SCSPTR, 0, 0, 0x24, 16) -SCIF_FNS(SCLSR, 0, 0, 0x28, 16) -#elif defined(CONFIG_CPU_SUBTYPE_SH7763) -SCIF_FNS(SCFDR, 0, 0, 0x1C, 16) -SCIF_FNS(SCSPTR2, 0, 0, 0x20, 16) -SCIF_FNS(SCLSR2, 0, 0, 0x24, 16) -SCIF_FNS(SCTFDR, 0x0e, 16, 0x1C, 16) -SCIF_FNS(SCRFDR, 0x0e, 16, 0x20, 16) -SCIF_FNS(SCSPTR, 0, 0, 0x24, 16) -SCIF_FNS(SCLSR, 0, 0, 0x28, 16) -#else -SCIF_FNS(SCFDR, 0x0e, 16, 0x1C, 16) -#if defined(CONFIG_CPU_SUBTYPE_SH7722) -SCIF_FNS(SCSPTR, 0, 0, 0, 0) -#else -SCIF_FNS(SCSPTR, 0, 0, 0x20, 16) -#endif -SCIF_FNS(SCLSR, 0, 0, 0x24, 16) -#endif -#endif -#define sci_in(port, reg) sci_##reg##_in(port) -#define sci_out(port, reg, value) sci_##reg##_out(port, value) - -/* H8/300 series SCI pins assignment */ -#if defined(__H8300H__) || defined(__H8300S__) -static const struct __attribute__((packed)) { - int port; /* GPIO port no */ - unsigned short rx,tx; /* GPIO bit no */ -} h8300_sci_pins[] = { -#if defined(CONFIG_H83007) || defined(CONFIG_H83068) - { /* SCI0 */ - .port = H8300_GPIO_P9, - .rx = H8300_GPIO_B2, - .tx = H8300_GPIO_B0, - }, - { /* SCI1 */ - .port = H8300_GPIO_P9, - .rx = H8300_GPIO_B3, - .tx = H8300_GPIO_B1, - }, - { /* SCI2 */ - .port = H8300_GPIO_PB, - .rx = H8300_GPIO_B7, - .tx = H8300_GPIO_B6, - } -#elif defined(CONFIG_H8S2678) - { /* SCI0 */ - .port = H8300_GPIO_P3, - .rx = H8300_GPIO_B2, - .tx = H8300_GPIO_B0, - }, - { /* SCI1 */ - .port = H8300_GPIO_P3, - .rx = H8300_GPIO_B3, - .tx = H8300_GPIO_B1, - }, - { /* SCI2 */ - .port = H8300_GPIO_P5, - .rx = H8300_GPIO_B1, - .tx = H8300_GPIO_B0, - } -#endif -}; -#endif - -#if defined(CONFIG_CPU_SUBTYPE_SH7706) || \ - defined(CONFIG_CPU_SUBTYPE_SH7707) || \ - defined(CONFIG_CPU_SUBTYPE_SH7708) || \ - defined(CONFIG_CPU_SUBTYPE_SH7709) -static inline int sci_rxd_in(struct uart_port *port) -{ - if (port->mapbase == 0xfffffe80) - return __raw_readb(SCPDR)&0x01 ? 1 : 0; /* SCI */ - return 1; -} -#elif defined(CONFIG_CPU_SUBTYPE_SH7750) || \ - defined(CONFIG_CPU_SUBTYPE_SH7751) || \ - defined(CONFIG_CPU_SUBTYPE_SH7751R) || \ - defined(CONFIG_CPU_SUBTYPE_SH7750R) || \ - defined(CONFIG_CPU_SUBTYPE_SH7750S) || \ - defined(CONFIG_CPU_SUBTYPE_SH7091) -static inline int sci_rxd_in(struct uart_port *port) -{ - if (port->mapbase == 0xffe00000) - return __raw_readb(SCSPTR1)&0x01 ? 1 : 0; /* SCI */ - return 1; -} -#elif defined(__H8300H__) || defined(__H8300S__) -static inline int sci_rxd_in(struct uart_port *port) -{ - int ch = (port->mapbase - SMR0) >> 3; - return (H8300_SCI_DR(ch) & h8300_sci_pins[ch].rx) ? 1 : 0; -} -#else /* default case for non-SCI processors */ -static inline int sci_rxd_in(struct uart_port *port) -{ - return 1; -} -#endif - -/* - * Values for the BitRate Register (SCBRR) - * - * The values are actually divisors for a frequency which can - * be internal to the SH3 (14.7456MHz) or derived from an external - * clock source. This driver assumes the internal clock is used; - * to support using an external clock source, config options or - * possibly command-line options would need to be added. - * - * Also, to support speeds below 2400 (why?) the lower 2 bits of - * the SCSMR register would also need to be set to non-zero values. - * - * -- Greg Banks 27Feb2000 - * - * Answer: The SCBRR register is only eight bits, and the value in - * it gets larger with lower baud rates. At around 2400 (depending on - * the peripherial module clock) you run out of bits. However the - * lower two bits of SCSMR allow the module clock to be divided down, - * scaling the value which is needed in SCBRR. - * - * -- Stuart Menefy - 23 May 2000 - * - * I meant, why would anyone bother with bitrates below 2400. - * - * -- Greg Banks - 7Jul2000 - * - * You "speedist"! How will I use my 110bps ASR-33 teletype with paper - * tape reader as a console! - * - * -- Mitch Davis - 15 Jul 2000 - */ - -#if (defined(CONFIG_CPU_SUBTYPE_SH7780) || \ - defined(CONFIG_CPU_SUBTYPE_SH7785) || \ - defined(CONFIG_CPU_SUBTYPE_SH7786)) && \ - !defined(CONFIG_SH_SH2007) -#define SCBRR_VALUE(bps, clk) ((clk+16*bps)/(16*bps)-1) -#elif defined(CONFIG_CPU_SUBTYPE_SH7705) || \ - defined(CONFIG_CPU_SUBTYPE_SH7720) || \ - defined(CONFIG_CPU_SUBTYPE_SH7721) || \ - defined(CONFIG_ARCH_SH73A0) || \ - defined(CONFIG_ARCH_SH7367) || \ - defined(CONFIG_ARCH_SH7377) || \ - defined(CONFIG_ARCH_SH7372) -#define SCBRR_VALUE(bps, clk) (((clk*2)+16*bps)/(32*bps)-1) -#elif defined(CONFIG_CPU_SUBTYPE_SH7723) ||\ - defined(CONFIG_CPU_SUBTYPE_SH7724) -static inline int scbrr_calc(struct uart_port *port, int bps, int clk) -{ - if (port->type == PORT_SCIF) - return (clk+16*bps)/(32*bps)-1; - else - return ((clk*2)+16*bps)/(16*bps)-1; -} -#define SCBRR_VALUE(bps, clk) scbrr_calc(port, bps, clk) -#elif defined(__H8300H__) || defined(__H8300S__) -#define SCBRR_VALUE(bps, clk) (((clk*1000/32)/bps)-1) -#else /* Generic SH */ -#define SCBRR_VALUE(bps, clk) ((clk+16*bps)/(32*bps)-1) -#endif diff --git a/drivers/serial/sn_console.c b/drivers/serial/sn_console.c deleted file mode 100644 index cff9a306660f..000000000000 --- a/drivers/serial/sn_console.c +++ /dev/null @@ -1,1085 +0,0 @@ -/* - * C-Brick Serial Port (and console) driver for SGI Altix machines. - * - * This driver is NOT suitable for talking to the l1-controller for - * anything other than 'console activities' --- please use the l1 - * driver for that. - * - * - * Copyright (c) 2004-2006 Silicon Graphics, Inc. All Rights Reserved. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it would be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. - * - * Further, this software is distributed without any warranty that it is - * free of the rightful claim of any third person regarding infringement - * or the like. Any license provided herein, whether implied or - * otherwise, applies only to this software file. Patent licenses, if - * any, provided herein do not apply to combinations of this program with - * other software, or any other product whatsoever. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. - * - * Contact information: Silicon Graphics, Inc., 1500 Crittenden Lane, - * Mountain View, CA 94043, or: - * - * http://www.sgi.com - * - * For further information regarding this notice, see: - * - * http://oss.sgi.com/projects/GenInfo/NoticeExplan - */ - -#include <linux/interrupt.h> -#include <linux/tty.h> -#include <linux/serial.h> -#include <linux/console.h> -#include <linux/module.h> -#include <linux/sysrq.h> -#include <linux/circ_buf.h> -#include <linux/serial_reg.h> -#include <linux/delay.h> /* for mdelay */ -#include <linux/miscdevice.h> -#include <linux/serial_core.h> - -#include <asm/io.h> -#include <asm/sn/simulator.h> -#include <asm/sn/sn_sal.h> - -/* number of characters we can transmit to the SAL console at a time */ -#define SN_SAL_MAX_CHARS 120 - -/* 64K, when we're asynch, it must be at least printk's LOG_BUF_LEN to - * avoid losing chars, (always has to be a power of 2) */ -#define SN_SAL_BUFFER_SIZE (64 * (1 << 10)) - -#define SN_SAL_UART_FIFO_DEPTH 16 -#define SN_SAL_UART_FIFO_SPEED_CPS (9600/10) - -/* sn_transmit_chars() calling args */ -#define TRANSMIT_BUFFERED 0 -#define TRANSMIT_RAW 1 - -/* To use dynamic numbers only and not use the assigned major and minor, - * define the following.. */ - /* #define USE_DYNAMIC_MINOR 1 *//* use dynamic minor number */ -#define USE_DYNAMIC_MINOR 0 /* Don't rely on misc_register dynamic minor */ - -/* Device name we're using */ -#define DEVICE_NAME "ttySG" -#define DEVICE_NAME_DYNAMIC "ttySG0" /* need full name for misc_register */ -/* The major/minor we are using, ignored for USE_DYNAMIC_MINOR */ -#define DEVICE_MAJOR 204 -#define DEVICE_MINOR 40 - -#ifdef CONFIG_MAGIC_SYSRQ -static char sysrq_serial_str[] = "\eSYS"; -static char *sysrq_serial_ptr = sysrq_serial_str; -static unsigned long sysrq_requested; -#endif /* CONFIG_MAGIC_SYSRQ */ - -/* - * Port definition - this kinda drives it all - */ -struct sn_cons_port { - struct timer_list sc_timer; - struct uart_port sc_port; - struct sn_sal_ops { - int (*sal_puts_raw) (const char *s, int len); - int (*sal_puts) (const char *s, int len); - int (*sal_getc) (void); - int (*sal_input_pending) (void); - void (*sal_wakeup_transmit) (struct sn_cons_port *, int); - } *sc_ops; - unsigned long sc_interrupt_timeout; - int sc_is_asynch; -}; - -static struct sn_cons_port sal_console_port; -static int sn_process_input; - -/* Only used if USE_DYNAMIC_MINOR is set to 1 */ -static struct miscdevice misc; /* used with misc_register for dynamic */ - -extern void early_sn_setup(void); - -#undef DEBUG -#ifdef DEBUG -static int sn_debug_printf(const char *fmt, ...); -#define DPRINTF(x...) sn_debug_printf(x) -#else -#define DPRINTF(x...) do { } while (0) -#endif - -/* Prototypes */ -static int snt_hw_puts_raw(const char *, int); -static int snt_hw_puts_buffered(const char *, int); -static int snt_poll_getc(void); -static int snt_poll_input_pending(void); -static int snt_intr_getc(void); -static int snt_intr_input_pending(void); -static void sn_transmit_chars(struct sn_cons_port *, int); - -/* A table for polling: - */ -static struct sn_sal_ops poll_ops = { - .sal_puts_raw = snt_hw_puts_raw, - .sal_puts = snt_hw_puts_raw, - .sal_getc = snt_poll_getc, - .sal_input_pending = snt_poll_input_pending -}; - -/* A table for interrupts enabled */ -static struct sn_sal_ops intr_ops = { - .sal_puts_raw = snt_hw_puts_raw, - .sal_puts = snt_hw_puts_buffered, - .sal_getc = snt_intr_getc, - .sal_input_pending = snt_intr_input_pending, - .sal_wakeup_transmit = sn_transmit_chars -}; - -/* the console does output in two distinctly different ways: - * synchronous (raw) and asynchronous (buffered). initally, early_printk - * does synchronous output. any data written goes directly to the SAL - * to be output (incidentally, it is internally buffered by the SAL) - * after interrupts and timers are initialized and available for use, - * the console init code switches to asynchronous output. this is - * also the earliest opportunity to begin polling for console input. - * after console initialization, console output and tty (serial port) - * output is buffered and sent to the SAL asynchronously (either by - * timer callback or by UART interrupt) */ - -/* routines for running the console in polling mode */ - -/** - * snt_poll_getc - Get a character from the console in polling mode - * - */ -static int snt_poll_getc(void) -{ - int ch; - - ia64_sn_console_getc(&ch); - return ch; -} - -/** - * snt_poll_input_pending - Check if any input is waiting - polling mode. - * - */ -static int snt_poll_input_pending(void) -{ - int status, input; - - status = ia64_sn_console_check(&input); - return !status && input; -} - -/* routines for an interrupt driven console (normal) */ - -/** - * snt_intr_getc - Get a character from the console, interrupt mode - * - */ -static int snt_intr_getc(void) -{ - return ia64_sn_console_readc(); -} - -/** - * snt_intr_input_pending - Check if input is pending, interrupt mode - * - */ -static int snt_intr_input_pending(void) -{ - return ia64_sn_console_intr_status() & SAL_CONSOLE_INTR_RECV; -} - -/* these functions are polled and interrupt */ - -/** - * snt_hw_puts_raw - Send raw string to the console, polled or interrupt mode - * @s: String - * @len: Length - * - */ -static int snt_hw_puts_raw(const char *s, int len) -{ - /* this will call the PROM and not return until this is done */ - return ia64_sn_console_putb(s, len); -} - -/** - * snt_hw_puts_buffered - Send string to console, polled or interrupt mode - * @s: String - * @len: Length - * - */ -static int snt_hw_puts_buffered(const char *s, int len) -{ - /* queue data to the PROM */ - return ia64_sn_console_xmit_chars((char *)s, len); -} - -/* uart interface structs - * These functions are associated with the uart_port that the serial core - * infrastructure calls. - * - * Note: Due to how the console works, many routines are no-ops. - */ - -/** - * snp_type - What type of console are we? - * @port: Port to operate with (we ignore since we only have one port) - * - */ -static const char *snp_type(struct uart_port *port) -{ - return ("SGI SN L1"); -} - -/** - * snp_tx_empty - Is the transmitter empty? We pretend we're always empty - * @port: Port to operate on (we ignore since we only have one port) - * - */ -static unsigned int snp_tx_empty(struct uart_port *port) -{ - return 1; -} - -/** - * snp_stop_tx - stop the transmitter - no-op for us - * @port: Port to operat eon - we ignore - no-op function - * - */ -static void snp_stop_tx(struct uart_port *port) -{ -} - -/** - * snp_release_port - Free i/o and resources for port - no-op for us - * @port: Port to operate on - we ignore - no-op function - * - */ -static void snp_release_port(struct uart_port *port) -{ -} - -/** - * snp_enable_ms - Force modem status interrupts on - no-op for us - * @port: Port to operate on - we ignore - no-op function - * - */ -static void snp_enable_ms(struct uart_port *port) -{ -} - -/** - * snp_shutdown - shut down the port - free irq and disable - no-op for us - * @port: Port to shut down - we ignore - * - */ -static void snp_shutdown(struct uart_port *port) -{ -} - -/** - * snp_set_mctrl - set control lines (dtr, rts, etc) - no-op for our console - * @port: Port to operate on - we ignore - * @mctrl: Lines to set/unset - we ignore - * - */ -static void snp_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ -} - -/** - * snp_get_mctrl - get contorl line info, we just return a static value - * @port: port to operate on - we only have one port so we ignore this - * - */ -static unsigned int snp_get_mctrl(struct uart_port *port) -{ - return TIOCM_CAR | TIOCM_RNG | TIOCM_DSR | TIOCM_CTS; -} - -/** - * snp_stop_rx - Stop the receiver - we ignor ethis - * @port: Port to operate on - we ignore - * - */ -static void snp_stop_rx(struct uart_port *port) -{ -} - -/** - * snp_start_tx - Start transmitter - * @port: Port to operate on - * - */ -static void snp_start_tx(struct uart_port *port) -{ - if (sal_console_port.sc_ops->sal_wakeup_transmit) - sal_console_port.sc_ops->sal_wakeup_transmit(&sal_console_port, - TRANSMIT_BUFFERED); - -} - -/** - * snp_break_ctl - handle breaks - ignored by us - * @port: Port to operate on - * @break_state: Break state - * - */ -static void snp_break_ctl(struct uart_port *port, int break_state) -{ -} - -/** - * snp_startup - Start up the serial port - always return 0 (We're always on) - * @port: Port to operate on - * - */ -static int snp_startup(struct uart_port *port) -{ - return 0; -} - -/** - * snp_set_termios - set termios stuff - we ignore these - * @port: port to operate on - * @termios: New settings - * @termios: Old - * - */ -static void -snp_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ -} - -/** - * snp_request_port - allocate resources for port - ignored by us - * @port: port to operate on - * - */ -static int snp_request_port(struct uart_port *port) -{ - return 0; -} - -/** - * snp_config_port - allocate resources, set up - we ignore, we're always on - * @port: Port to operate on - * @flags: flags used for port setup - * - */ -static void snp_config_port(struct uart_port *port, int flags) -{ -} - -/* Associate the uart functions above - given to serial core */ - -static struct uart_ops sn_console_ops = { - .tx_empty = snp_tx_empty, - .set_mctrl = snp_set_mctrl, - .get_mctrl = snp_get_mctrl, - .stop_tx = snp_stop_tx, - .start_tx = snp_start_tx, - .stop_rx = snp_stop_rx, - .enable_ms = snp_enable_ms, - .break_ctl = snp_break_ctl, - .startup = snp_startup, - .shutdown = snp_shutdown, - .set_termios = snp_set_termios, - .pm = NULL, - .type = snp_type, - .release_port = snp_release_port, - .request_port = snp_request_port, - .config_port = snp_config_port, - .verify_port = NULL, -}; - -/* End of uart struct functions and defines */ - -#ifdef DEBUG - -/** - * sn_debug_printf - close to hardware debugging printf - * @fmt: printf format - * - * This is as "close to the metal" as we can get, used when the driver - * itself may be broken. - * - */ -static int sn_debug_printf(const char *fmt, ...) -{ - static char printk_buf[1024]; - int printed_len; - va_list args; - - va_start(args, fmt); - printed_len = vsnprintf(printk_buf, sizeof(printk_buf), fmt, args); - - if (!sal_console_port.sc_ops) { - sal_console_port.sc_ops = &poll_ops; - early_sn_setup(); - } - sal_console_port.sc_ops->sal_puts_raw(printk_buf, printed_len); - - va_end(args); - return printed_len; -} -#endif /* DEBUG */ - -/* - * Interrupt handling routines. - */ - -/** - * sn_receive_chars - Grab characters, pass them to tty layer - * @port: Port to operate on - * @flags: irq flags - * - * Note: If we're not registered with the serial core infrastructure yet, - * we don't try to send characters to it... - * - */ -static void -sn_receive_chars(struct sn_cons_port *port, unsigned long flags) -{ - int ch; - struct tty_struct *tty; - - if (!port) { - printk(KERN_ERR "sn_receive_chars - port NULL so can't receieve\n"); - return; - } - - if (!port->sc_ops) { - printk(KERN_ERR "sn_receive_chars - port->sc_ops NULL so can't receieve\n"); - return; - } - - if (port->sc_port.state) { - /* The serial_core stuffs are initialized, use them */ - tty = port->sc_port.state->port.tty; - } - else { - /* Not registered yet - can't pass to tty layer. */ - tty = NULL; - } - - while (port->sc_ops->sal_input_pending()) { - ch = port->sc_ops->sal_getc(); - if (ch < 0) { - printk(KERN_ERR "sn_console: An error occured while " - "obtaining data from the console (0x%0x)\n", ch); - break; - } -#ifdef CONFIG_MAGIC_SYSRQ - if (sysrq_requested) { - unsigned long sysrq_timeout = sysrq_requested + HZ*5; - - sysrq_requested = 0; - if (ch && time_before(jiffies, sysrq_timeout)) { - spin_unlock_irqrestore(&port->sc_port.lock, flags); - handle_sysrq(ch); - spin_lock_irqsave(&port->sc_port.lock, flags); - /* ignore actual sysrq command char */ - continue; - } - } - if (ch == *sysrq_serial_ptr) { - if (!(*++sysrq_serial_ptr)) { - sysrq_requested = jiffies; - sysrq_serial_ptr = sysrq_serial_str; - } - /* - * ignore the whole sysrq string except for the - * leading escape - */ - if (ch != '\e') - continue; - } - else - sysrq_serial_ptr = sysrq_serial_str; -#endif /* CONFIG_MAGIC_SYSRQ */ - - /* record the character to pass up to the tty layer */ - if (tty) { - if(tty_insert_flip_char(tty, ch, TTY_NORMAL) == 0) - break; - } - port->sc_port.icount.rx++; - } - - if (tty) - tty_flip_buffer_push(tty); -} - -/** - * sn_transmit_chars - grab characters from serial core, send off - * @port: Port to operate on - * @raw: Transmit raw or buffered - * - * Note: If we're early, before we're registered with serial core, the - * writes are going through sn_sal_console_write because that's how - * register_console has been set up. We currently could have asynch - * polls calling this function due to sn_sal_switch_to_asynch but we can - * ignore them until we register with the serial core stuffs. - * - */ -static void sn_transmit_chars(struct sn_cons_port *port, int raw) -{ - int xmit_count, tail, head, loops, ii; - int result; - char *start; - struct circ_buf *xmit; - - if (!port) - return; - - BUG_ON(!port->sc_is_asynch); - - if (port->sc_port.state) { - /* We're initialized, using serial core infrastructure */ - xmit = &port->sc_port.state->xmit; - } else { - /* Probably sn_sal_switch_to_asynch has been run but serial core isn't - * initialized yet. Just return. Writes are going through - * sn_sal_console_write (due to register_console) at this time. - */ - return; - } - - if (uart_circ_empty(xmit) || uart_tx_stopped(&port->sc_port)) { - /* Nothing to do. */ - ia64_sn_console_intr_disable(SAL_CONSOLE_INTR_XMIT); - return; - } - - head = xmit->head; - tail = xmit->tail; - start = &xmit->buf[tail]; - - /* twice around gets the tail to the end of the buffer and - * then to the head, if needed */ - loops = (head < tail) ? 2 : 1; - - for (ii = 0; ii < loops; ii++) { - xmit_count = (head < tail) ? - (UART_XMIT_SIZE - tail) : (head - tail); - - if (xmit_count > 0) { - if (raw == TRANSMIT_RAW) - result = - port->sc_ops->sal_puts_raw(start, - xmit_count); - else - result = - port->sc_ops->sal_puts(start, xmit_count); -#ifdef DEBUG - if (!result) - DPRINTF("`"); -#endif - if (result > 0) { - xmit_count -= result; - port->sc_port.icount.tx += result; - tail += result; - tail &= UART_XMIT_SIZE - 1; - xmit->tail = tail; - start = &xmit->buf[tail]; - } - } - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&port->sc_port); - - if (uart_circ_empty(xmit)) - snp_stop_tx(&port->sc_port); /* no-op for us */ -} - -/** - * sn_sal_interrupt - Handle console interrupts - * @irq: irq #, useful for debug statements - * @dev_id: our pointer to our port (sn_cons_port which contains the uart port) - * - */ -static irqreturn_t sn_sal_interrupt(int irq, void *dev_id) -{ - struct sn_cons_port *port = (struct sn_cons_port *)dev_id; - unsigned long flags; - int status = ia64_sn_console_intr_status(); - - if (!port) - return IRQ_NONE; - - spin_lock_irqsave(&port->sc_port.lock, flags); - if (status & SAL_CONSOLE_INTR_RECV) { - sn_receive_chars(port, flags); - } - if (status & SAL_CONSOLE_INTR_XMIT) { - sn_transmit_chars(port, TRANSMIT_BUFFERED); - } - spin_unlock_irqrestore(&port->sc_port.lock, flags); - return IRQ_HANDLED; -} - -/** - * sn_sal_timer_poll - this function handles polled console mode - * @data: A pointer to our sn_cons_port (which contains the uart port) - * - * data is the pointer that init_timer will store for us. This function is - * associated with init_timer to see if there is any console traffic. - * Obviously not used in interrupt mode - * - */ -static void sn_sal_timer_poll(unsigned long data) -{ - struct sn_cons_port *port = (struct sn_cons_port *)data; - unsigned long flags; - - if (!port) - return; - - if (!port->sc_port.irq) { - spin_lock_irqsave(&port->sc_port.lock, flags); - if (sn_process_input) - sn_receive_chars(port, flags); - sn_transmit_chars(port, TRANSMIT_RAW); - spin_unlock_irqrestore(&port->sc_port.lock, flags); - mod_timer(&port->sc_timer, - jiffies + port->sc_interrupt_timeout); - } -} - -/* - * Boot-time initialization code - */ - -/** - * sn_sal_switch_to_asynch - Switch to async mode (as opposed to synch) - * @port: Our sn_cons_port (which contains the uart port) - * - * So this is used by sn_sal_serial_console_init (early on, before we're - * registered with serial core). It's also used by sn_sal_module_init - * right after we've registered with serial core. The later only happens - * if we didn't already come through here via sn_sal_serial_console_init. - * - */ -static void __init sn_sal_switch_to_asynch(struct sn_cons_port *port) -{ - unsigned long flags; - - if (!port) - return; - - DPRINTF("sn_console: about to switch to asynchronous console\n"); - - /* without early_printk, we may be invoked late enough to race - * with other cpus doing console IO at this point, however - * console interrupts will never be enabled */ - spin_lock_irqsave(&port->sc_port.lock, flags); - - /* early_printk invocation may have done this for us */ - if (!port->sc_ops) - port->sc_ops = &poll_ops; - - /* we can't turn on the console interrupt (as request_irq - * calls kmalloc, which isn't set up yet), so we rely on a - * timer to poll for input and push data from the console - * buffer. - */ - init_timer(&port->sc_timer); - port->sc_timer.function = sn_sal_timer_poll; - port->sc_timer.data = (unsigned long)port; - - if (IS_RUNNING_ON_SIMULATOR()) - port->sc_interrupt_timeout = 6; - else { - /* 960cps / 16 char FIFO = 60HZ - * HZ / (SN_SAL_FIFO_SPEED_CPS / SN_SAL_FIFO_DEPTH) */ - port->sc_interrupt_timeout = - HZ * SN_SAL_UART_FIFO_DEPTH / SN_SAL_UART_FIFO_SPEED_CPS; - } - mod_timer(&port->sc_timer, jiffies + port->sc_interrupt_timeout); - - port->sc_is_asynch = 1; - spin_unlock_irqrestore(&port->sc_port.lock, flags); -} - -/** - * sn_sal_switch_to_interrupts - Switch to interrupt driven mode - * @port: Our sn_cons_port (which contains the uart port) - * - * In sn_sal_module_init, after we're registered with serial core and - * the port is added, this function is called to switch us to interrupt - * mode. We were previously in asynch/polling mode (using init_timer). - * - * We attempt to switch to interrupt mode here by calling - * request_irq. If that works out, we enable receive interrupts. - */ -static void __init sn_sal_switch_to_interrupts(struct sn_cons_port *port) -{ - unsigned long flags; - - if (port) { - DPRINTF("sn_console: switching to interrupt driven console\n"); - - if (request_irq(SGI_UART_VECTOR, sn_sal_interrupt, - IRQF_DISABLED | IRQF_SHARED, - "SAL console driver", port) >= 0) { - spin_lock_irqsave(&port->sc_port.lock, flags); - port->sc_port.irq = SGI_UART_VECTOR; - port->sc_ops = &intr_ops; - - /* turn on receive interrupts */ - ia64_sn_console_intr_enable(SAL_CONSOLE_INTR_RECV); - spin_unlock_irqrestore(&port->sc_port.lock, flags); - } - else { - printk(KERN_INFO - "sn_console: console proceeding in polled mode\n"); - } - } -} - -/* - * Kernel console definitions - */ - -static void sn_sal_console_write(struct console *, const char *, unsigned); -static int sn_sal_console_setup(struct console *, char *); -static struct uart_driver sal_console_uart; -extern struct tty_driver *uart_console_device(struct console *, int *); - -static struct console sal_console = { - .name = DEVICE_NAME, - .write = sn_sal_console_write, - .device = uart_console_device, - .setup = sn_sal_console_setup, - .index = -1, /* unspecified */ - .data = &sal_console_uart, -}; - -#define SAL_CONSOLE &sal_console - -static struct uart_driver sal_console_uart = { - .owner = THIS_MODULE, - .driver_name = "sn_console", - .dev_name = DEVICE_NAME, - .major = 0, /* major/minor set at registration time per USE_DYNAMIC_MINOR */ - .minor = 0, - .nr = 1, /* one port */ - .cons = SAL_CONSOLE, -}; - -/** - * sn_sal_module_init - When the kernel loads us, get us rolling w/ serial core - * - * Before this is called, we've been printing kernel messages in a special - * early mode not making use of the serial core infrastructure. When our - * driver is loaded for real, we register the driver and port with serial - * core and try to enable interrupt driven mode. - * - */ -static int __init sn_sal_module_init(void) -{ - int retval; - - if (!ia64_platform_is("sn2")) - return 0; - - printk(KERN_INFO "sn_console: Console driver init\n"); - - if (USE_DYNAMIC_MINOR == 1) { - misc.minor = MISC_DYNAMIC_MINOR; - misc.name = DEVICE_NAME_DYNAMIC; - retval = misc_register(&misc); - if (retval != 0) { - printk(KERN_WARNING "Failed to register console " - "device using misc_register.\n"); - return -ENODEV; - } - sal_console_uart.major = MISC_MAJOR; - sal_console_uart.minor = misc.minor; - } else { - sal_console_uart.major = DEVICE_MAJOR; - sal_console_uart.minor = DEVICE_MINOR; - } - - /* We register the driver and the port before switching to interrupts - * or async above so the proper uart structures are populated */ - - if (uart_register_driver(&sal_console_uart) < 0) { - printk - ("ERROR sn_sal_module_init failed uart_register_driver, line %d\n", - __LINE__); - return -ENODEV; - } - - spin_lock_init(&sal_console_port.sc_port.lock); - - /* Setup the port struct with the minimum needed */ - sal_console_port.sc_port.membase = (char *)1; /* just needs to be non-zero */ - sal_console_port.sc_port.type = PORT_16550A; - sal_console_port.sc_port.fifosize = SN_SAL_MAX_CHARS; - sal_console_port.sc_port.ops = &sn_console_ops; - sal_console_port.sc_port.line = 0; - - if (uart_add_one_port(&sal_console_uart, &sal_console_port.sc_port) < 0) { - /* error - not sure what I'd do - so I'll do nothing */ - printk(KERN_ERR "%s: unable to add port\n", __func__); - } - - /* when this driver is compiled in, the console initialization - * will have already switched us into asynchronous operation - * before we get here through the module initcalls */ - if (!sal_console_port.sc_is_asynch) { - sn_sal_switch_to_asynch(&sal_console_port); - } - - /* at this point (module_init) we can try to turn on interrupts */ - if (!IS_RUNNING_ON_SIMULATOR()) { - sn_sal_switch_to_interrupts(&sal_console_port); - } - sn_process_input = 1; - return 0; -} - -/** - * sn_sal_module_exit - When we're unloaded, remove the driver/port - * - */ -static void __exit sn_sal_module_exit(void) -{ - del_timer_sync(&sal_console_port.sc_timer); - uart_remove_one_port(&sal_console_uart, &sal_console_port.sc_port); - uart_unregister_driver(&sal_console_uart); - misc_deregister(&misc); -} - -module_init(sn_sal_module_init); -module_exit(sn_sal_module_exit); - -/** - * puts_raw_fixed - sn_sal_console_write helper for adding \r's as required - * @puts_raw : puts function to do the writing - * @s: input string - * @count: length - * - * We need a \r ahead of every \n for direct writes through - * ia64_sn_console_putb (what sal_puts_raw below actually does). - * - */ - -static void puts_raw_fixed(int (*puts_raw) (const char *s, int len), - const char *s, int count) -{ - const char *s1; - - /* Output '\r' before each '\n' */ - while ((s1 = memchr(s, '\n', count)) != NULL) { - puts_raw(s, s1 - s); - puts_raw("\r\n", 2); - count -= s1 + 1 - s; - s = s1 + 1; - } - puts_raw(s, count); -} - -/** - * sn_sal_console_write - Print statements before serial core available - * @console: Console to operate on - we ignore since we have just one - * @s: String to send - * @count: length - * - * This is referenced in the console struct. It is used for early - * console printing before we register with serial core and for things - * such as kdb. The console_lock must be held when we get here. - * - * This function has some code for trying to print output even if the lock - * is held. We try to cover the case where a lock holder could have died. - * We don't use this special case code if we're not registered with serial - * core yet. After we're registered with serial core, the only time this - * function would be used is for high level kernel output like magic sys req, - * kdb, and printk's. - */ -static void -sn_sal_console_write(struct console *co, const char *s, unsigned count) -{ - unsigned long flags = 0; - struct sn_cons_port *port = &sal_console_port; - static int stole_lock = 0; - - BUG_ON(!port->sc_is_asynch); - - /* We can't look at the xmit buffer if we're not registered with serial core - * yet. So only do the fancy recovery after registering - */ - if (!port->sc_port.state) { - /* Not yet registered with serial core - simple case */ - puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count); - return; - } - - /* somebody really wants this output, might be an - * oops, kdb, panic, etc. make sure they get it. */ - if (spin_is_locked(&port->sc_port.lock)) { - int lhead = port->sc_port.state->xmit.head; - int ltail = port->sc_port.state->xmit.tail; - int counter, got_lock = 0; - - /* - * We attempt to determine if someone has died with the - * lock. We wait ~20 secs after the head and tail ptrs - * stop moving and assume the lock holder is not functional - * and plow ahead. If the lock is freed within the time out - * period we re-get the lock and go ahead normally. We also - * remember if we have plowed ahead so that we don't have - * to wait out the time out period again - the asumption - * is that we will time out again. - */ - - for (counter = 0; counter < 150; mdelay(125), counter++) { - if (!spin_is_locked(&port->sc_port.lock) - || stole_lock) { - if (!stole_lock) { - spin_lock_irqsave(&port->sc_port.lock, - flags); - got_lock = 1; - } - break; - } else { - /* still locked */ - if ((lhead != port->sc_port.state->xmit.head) - || (ltail != - port->sc_port.state->xmit.tail)) { - lhead = - port->sc_port.state->xmit.head; - ltail = - port->sc_port.state->xmit.tail; - counter = 0; - } - } - } - /* flush anything in the serial core xmit buffer, raw */ - sn_transmit_chars(port, 1); - if (got_lock) { - spin_unlock_irqrestore(&port->sc_port.lock, flags); - stole_lock = 0; - } else { - /* fell thru */ - stole_lock = 1; - } - puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count); - } else { - stole_lock = 0; - spin_lock_irqsave(&port->sc_port.lock, flags); - sn_transmit_chars(port, 1); - spin_unlock_irqrestore(&port->sc_port.lock, flags); - - puts_raw_fixed(port->sc_ops->sal_puts_raw, s, count); - } -} - - -/** - * sn_sal_console_setup - Set up console for early printing - * @co: Console to work with - * @options: Options to set - * - * Altix console doesn't do anything with baud rates, etc, anyway. - * - * This isn't required since not providing the setup function in the - * console struct is ok. However, other patches like KDB plop something - * here so providing it is easier. - * - */ -static int sn_sal_console_setup(struct console *co, char *options) -{ - return 0; -} - -/** - * sn_sal_console_write_early - simple early output routine - * @co - console struct - * @s - string to print - * @count - count - * - * Simple function to provide early output, before even - * sn_sal_serial_console_init is called. Referenced in the - * console struct registerd in sn_serial_console_early_setup. - * - */ -static void __init -sn_sal_console_write_early(struct console *co, const char *s, unsigned count) -{ - puts_raw_fixed(sal_console_port.sc_ops->sal_puts_raw, s, count); -} - -/* Used for very early console printing - again, before - * sn_sal_serial_console_init is run */ -static struct console sal_console_early __initdata = { - .name = "sn_sal", - .write = sn_sal_console_write_early, - .flags = CON_PRINTBUFFER, - .index = -1, -}; - -/** - * sn_serial_console_early_setup - Sets up early console output support - * - * Register a console early on... This is for output before even - * sn_sal_serial_cosnole_init is called. This function is called from - * setup.c. This allows us to do really early polled writes. When - * sn_sal_serial_console_init is called, this console is unregistered - * and a new one registered. - */ -int __init sn_serial_console_early_setup(void) -{ - if (!ia64_platform_is("sn2")) - return -1; - - sal_console_port.sc_ops = &poll_ops; - spin_lock_init(&sal_console_port.sc_port.lock); - early_sn_setup(); /* Find SAL entry points */ - register_console(&sal_console_early); - - return 0; -} - -/** - * sn_sal_serial_console_init - Early console output - set up for register - * - * This function is called when regular console init happens. Because we - * support even earlier console output with sn_serial_console_early_setup - * (called from setup.c directly), this function unregisters the really - * early console. - * - * Note: Even if setup.c doesn't register sal_console_early, unregistering - * it here doesn't hurt anything. - * - */ -static int __init sn_sal_serial_console_init(void) -{ - if (ia64_platform_is("sn2")) { - sn_sal_switch_to_asynch(&sal_console_port); - DPRINTF("sn_sal_serial_console_init : register console\n"); - register_console(&sal_console); - unregister_console(&sal_console_early); - } - return 0; -} - -console_initcall(sn_sal_serial_console_init); diff --git a/drivers/serial/suncore.c b/drivers/serial/suncore.c deleted file mode 100644 index 6381a0282ee7..000000000000 --- a/drivers/serial/suncore.c +++ /dev/null @@ -1,247 +0,0 @@ -/* suncore.c - * - * Common SUN serial routines. Based entirely - * upon drivers/sbus/char/sunserial.c which is: - * - * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) - * - * Adaptation to new UART layer is: - * - * Copyright (C) 2002 David S. Miller (davem@redhat.com) - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/console.h> -#include <linux/tty.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/serial_core.h> -#include <linux/init.h> - -#include <asm/prom.h> - -#include "suncore.h" - -static int sunserial_current_minor = 64; - -int sunserial_register_minors(struct uart_driver *drv, int count) -{ - int err = 0; - - drv->minor = sunserial_current_minor; - drv->nr += count; - /* Register the driver on the first call */ - if (drv->nr == count) - err = uart_register_driver(drv); - if (err == 0) { - sunserial_current_minor += count; - drv->tty_driver->name_base = drv->minor - 64; - } - return err; -} -EXPORT_SYMBOL(sunserial_register_minors); - -void sunserial_unregister_minors(struct uart_driver *drv, int count) -{ - drv->nr -= count; - sunserial_current_minor -= count; - - if (drv->nr == 0) - uart_unregister_driver(drv); -} -EXPORT_SYMBOL(sunserial_unregister_minors); - -int sunserial_console_match(struct console *con, struct device_node *dp, - struct uart_driver *drv, int line, bool ignore_line) -{ - if (!con) - return 0; - - drv->cons = con; - - if (of_console_device != dp) - return 0; - - if (!ignore_line) { - int off = 0; - - if (of_console_options && - *of_console_options == 'b') - off = 1; - - if ((line & 1) != off) - return 0; - } - - if (!console_set_on_cmdline) { - con->index = line; - add_preferred_console(con->name, line, NULL); - } - return 1; -} -EXPORT_SYMBOL(sunserial_console_match); - -void sunserial_console_termios(struct console *con, struct device_node *uart_dp) -{ - const char *mode, *s; - char mode_prop[] = "ttyX-mode"; - int baud, bits, stop, cflag; - char parity; - - if (!strcmp(uart_dp->name, "rsc") || - !strcmp(uart_dp->name, "rsc-console") || - !strcmp(uart_dp->name, "rsc-control")) { - mode = of_get_property(uart_dp, - "ssp-console-modes", NULL); - if (!mode) - mode = "115200,8,n,1,-"; - } else if (!strcmp(uart_dp->name, "lom-console")) { - mode = "9600,8,n,1,-"; - } else { - struct device_node *dp; - char c; - - c = 'a'; - if (of_console_options) - c = *of_console_options; - - mode_prop[3] = c; - - dp = of_find_node_by_path("/options"); - mode = of_get_property(dp, mode_prop, NULL); - if (!mode) - mode = "9600,8,n,1,-"; - } - - cflag = CREAD | HUPCL | CLOCAL; - - s = mode; - baud = simple_strtoul(s, NULL, 0); - s = strchr(s, ','); - bits = simple_strtoul(++s, NULL, 0); - s = strchr(s, ','); - parity = *(++s); - s = strchr(s, ','); - stop = simple_strtoul(++s, NULL, 0); - s = strchr(s, ','); - /* XXX handshake is not handled here. */ - - switch (baud) { - case 150: cflag |= B150; break; - case 300: cflag |= B300; break; - case 600: cflag |= B600; break; - case 1200: cflag |= B1200; break; - case 2400: cflag |= B2400; break; - case 4800: cflag |= B4800; break; - case 9600: cflag |= B9600; break; - case 19200: cflag |= B19200; break; - case 38400: cflag |= B38400; break; - case 57600: cflag |= B57600; break; - case 115200: cflag |= B115200; break; - case 230400: cflag |= B230400; break; - case 460800: cflag |= B460800; break; - default: baud = 9600; cflag |= B9600; break; - } - - switch (bits) { - case 5: cflag |= CS5; break; - case 6: cflag |= CS6; break; - case 7: cflag |= CS7; break; - case 8: cflag |= CS8; break; - default: cflag |= CS8; break; - } - - switch (parity) { - case 'o': cflag |= (PARENB | PARODD); break; - case 'e': cflag |= PARENB; break; - case 'n': default: break; - } - - switch (stop) { - case 2: cflag |= CSTOPB; break; - case 1: default: break; - } - - con->cflag = cflag; -} - -/* Sun serial MOUSE auto baud rate detection. */ -static struct mouse_baud_cflag { - int baud; - unsigned int cflag; -} mouse_baud_table[] = { - { 1200, B1200 }, - { 2400, B2400 }, - { 4800, B4800 }, - { 9600, B9600 }, - { -1, ~0 }, - { -1, ~0 }, -}; - -unsigned int suncore_mouse_baud_cflag_next(unsigned int cflag, int *new_baud) -{ - int i; - - for (i = 0; mouse_baud_table[i].baud != -1; i++) - if (mouse_baud_table[i].cflag == (cflag & CBAUD)) - break; - - i += 1; - if (mouse_baud_table[i].baud == -1) - i = 0; - - *new_baud = mouse_baud_table[i].baud; - return mouse_baud_table[i].cflag; -} - -EXPORT_SYMBOL(suncore_mouse_baud_cflag_next); - -/* Basically, when the baud rate is wrong the mouse spits out - * breaks to us. - */ -int suncore_mouse_baud_detection(unsigned char ch, int is_break) -{ - static int mouse_got_break = 0; - static int ctr = 0; - - if (is_break) { - /* Let a few normal bytes go by before we jump the gun - * and say we need to try another baud rate. - */ - if (mouse_got_break && ctr < 8) - return 1; - - /* Ok, we need to try another baud. */ - ctr = 0; - mouse_got_break = 1; - return 2; - } - if (mouse_got_break) { - ctr++; - if (ch == 0x87) { - /* Correct baud rate determined. */ - mouse_got_break = 0; - } - return 1; - } - return 0; -} - -EXPORT_SYMBOL(suncore_mouse_baud_detection); - -static int __init suncore_init(void) -{ - return 0; -} - -static void __exit suncore_exit(void) -{ -} - -module_init(suncore_init); -module_exit(suncore_exit); - -MODULE_AUTHOR("Eddie C. Dost, David S. Miller"); -MODULE_DESCRIPTION("Sun serial common layer"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/suncore.h b/drivers/serial/suncore.h deleted file mode 100644 index db2057936c31..000000000000 --- a/drivers/serial/suncore.h +++ /dev/null @@ -1,33 +0,0 @@ -/* suncore.h - * - * Generic SUN serial/kbd/ms layer. Based entirely - * upon drivers/sbus/char/sunserial.h which is: - * - * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) - * - * Port to new UART layer is: - * - * Copyright (C) 2002 David S. Miller (davem@redhat.com) - */ - -#ifndef _SERIAL_SUN_H -#define _SERIAL_SUN_H - -/* Serial keyboard defines for L1-A processing... */ -#define SUNKBD_RESET 0xff -#define SUNKBD_L1 0x01 -#define SUNKBD_UP 0x80 -#define SUNKBD_A 0x4d - -extern unsigned int suncore_mouse_baud_cflag_next(unsigned int, int *); -extern int suncore_mouse_baud_detection(unsigned char, int); - -extern int sunserial_register_minors(struct uart_driver *, int); -extern void sunserial_unregister_minors(struct uart_driver *, int); - -extern int sunserial_console_match(struct console *, struct device_node *, - struct uart_driver *, int, bool); -extern void sunserial_console_termios(struct console *, - struct device_node *); - -#endif /* !(_SERIAL_SUN_H) */ diff --git a/drivers/serial/sunhv.c b/drivers/serial/sunhv.c deleted file mode 100644 index c9014868297d..000000000000 --- a/drivers/serial/sunhv.c +++ /dev/null @@ -1,661 +0,0 @@ -/* sunhv.c: Serial driver for SUN4V hypervisor console. - * - * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net) - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/major.h> -#include <linux/circ_buf.h> -#include <linux/serial.h> -#include <linux/sysrq.h> -#include <linux/console.h> -#include <linux/spinlock.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/of_device.h> - -#include <asm/hypervisor.h> -#include <asm/spitfire.h> -#include <asm/prom.h> -#include <asm/irq.h> - -#if defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/serial_core.h> - -#include "suncore.h" - -#define CON_BREAK ((long)-1) -#define CON_HUP ((long)-2) - -#define IGNORE_BREAK 0x1 -#define IGNORE_ALL 0x2 - -static char *con_write_page; -static char *con_read_page; - -static int hung_up = 0; - -static void transmit_chars_putchar(struct uart_port *port, struct circ_buf *xmit) -{ - while (!uart_circ_empty(xmit)) { - long status = sun4v_con_putchar(xmit->buf[xmit->tail]); - - if (status != HV_EOK) - break; - - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - } -} - -static void transmit_chars_write(struct uart_port *port, struct circ_buf *xmit) -{ - while (!uart_circ_empty(xmit)) { - unsigned long ra = __pa(xmit->buf + xmit->tail); - unsigned long len, status, sent; - - len = CIRC_CNT_TO_END(xmit->head, xmit->tail, - UART_XMIT_SIZE); - status = sun4v_con_write(ra, len, &sent); - if (status != HV_EOK) - break; - xmit->tail = (xmit->tail + sent) & (UART_XMIT_SIZE - 1); - port->icount.tx += sent; - } -} - -static int receive_chars_getchar(struct uart_port *port, struct tty_struct *tty) -{ - int saw_console_brk = 0; - int limit = 10000; - - while (limit-- > 0) { - long status; - long c = sun4v_con_getchar(&status); - - if (status == HV_EWOULDBLOCK) - break; - - if (c == CON_BREAK) { - if (uart_handle_break(port)) - continue; - saw_console_brk = 1; - c = 0; - } - - if (c == CON_HUP) { - hung_up = 1; - uart_handle_dcd_change(port, 0); - } else if (hung_up) { - hung_up = 0; - uart_handle_dcd_change(port, 1); - } - - if (tty == NULL) { - uart_handle_sysrq_char(port, c); - continue; - } - - port->icount.rx++; - - if (uart_handle_sysrq_char(port, c)) - continue; - - tty_insert_flip_char(tty, c, TTY_NORMAL); - } - - return saw_console_brk; -} - -static int receive_chars_read(struct uart_port *port, struct tty_struct *tty) -{ - int saw_console_brk = 0; - int limit = 10000; - - while (limit-- > 0) { - unsigned long ra = __pa(con_read_page); - unsigned long bytes_read, i; - long stat = sun4v_con_read(ra, PAGE_SIZE, &bytes_read); - - if (stat != HV_EOK) { - bytes_read = 0; - - if (stat == CON_BREAK) { - if (uart_handle_break(port)) - continue; - saw_console_brk = 1; - *con_read_page = 0; - bytes_read = 1; - } else if (stat == CON_HUP) { - hung_up = 1; - uart_handle_dcd_change(port, 0); - continue; - } else { - /* HV_EWOULDBLOCK, etc. */ - break; - } - } - - if (hung_up) { - hung_up = 0; - uart_handle_dcd_change(port, 1); - } - - for (i = 0; i < bytes_read; i++) - uart_handle_sysrq_char(port, con_read_page[i]); - - if (tty == NULL) - continue; - - port->icount.rx += bytes_read; - - tty_insert_flip_string(tty, con_read_page, bytes_read); - } - - return saw_console_brk; -} - -struct sunhv_ops { - void (*transmit_chars)(struct uart_port *port, struct circ_buf *xmit); - int (*receive_chars)(struct uart_port *port, struct tty_struct *tty); -}; - -static struct sunhv_ops bychar_ops = { - .transmit_chars = transmit_chars_putchar, - .receive_chars = receive_chars_getchar, -}; - -static struct sunhv_ops bywrite_ops = { - .transmit_chars = transmit_chars_write, - .receive_chars = receive_chars_read, -}; - -static struct sunhv_ops *sunhv_ops = &bychar_ops; - -static struct tty_struct *receive_chars(struct uart_port *port) -{ - struct tty_struct *tty = NULL; - - if (port->state != NULL) /* Unopened serial console */ - tty = port->state->port.tty; - - if (sunhv_ops->receive_chars(port, tty)) - sun_do_break(); - - return tty; -} - -static void transmit_chars(struct uart_port *port) -{ - struct circ_buf *xmit; - - if (!port->state) - return; - - xmit = &port->state->xmit; - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) - return; - - sunhv_ops->transmit_chars(port, xmit); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); -} - -static irqreturn_t sunhv_interrupt(int irq, void *dev_id) -{ - struct uart_port *port = dev_id; - struct tty_struct *tty; - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - tty = receive_chars(port); - transmit_chars(port); - spin_unlock_irqrestore(&port->lock, flags); - - if (tty) - tty_flip_buffer_push(tty); - - return IRQ_HANDLED; -} - -/* port->lock is not held. */ -static unsigned int sunhv_tx_empty(struct uart_port *port) -{ - /* Transmitter is always empty for us. If the circ buffer - * is non-empty or there is an x_char pending, our caller - * will do the right thing and ignore what we return here. - */ - return TIOCSER_TEMT; -} - -/* port->lock held by caller. */ -static void sunhv_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - return; -} - -/* port->lock is held by caller and interrupts are disabled. */ -static unsigned int sunhv_get_mctrl(struct uart_port *port) -{ - return TIOCM_DSR | TIOCM_CAR | TIOCM_CTS; -} - -/* port->lock held by caller. */ -static void sunhv_stop_tx(struct uart_port *port) -{ - return; -} - -/* port->lock held by caller. */ -static void sunhv_start_tx(struct uart_port *port) -{ - transmit_chars(port); -} - -/* port->lock is not held. */ -static void sunhv_send_xchar(struct uart_port *port, char ch) -{ - unsigned long flags; - int limit = 10000; - - spin_lock_irqsave(&port->lock, flags); - - while (limit-- > 0) { - long status = sun4v_con_putchar(ch); - if (status == HV_EOK) - break; - udelay(1); - } - - spin_unlock_irqrestore(&port->lock, flags); -} - -/* port->lock held by caller. */ -static void sunhv_stop_rx(struct uart_port *port) -{ -} - -/* port->lock held by caller. */ -static void sunhv_enable_ms(struct uart_port *port) -{ -} - -/* port->lock is not held. */ -static void sunhv_break_ctl(struct uart_port *port, int break_state) -{ - if (break_state) { - unsigned long flags; - int limit = 10000; - - spin_lock_irqsave(&port->lock, flags); - - while (limit-- > 0) { - long status = sun4v_con_putchar(CON_BREAK); - if (status == HV_EOK) - break; - udelay(1); - } - - spin_unlock_irqrestore(&port->lock, flags); - } -} - -/* port->lock is not held. */ -static int sunhv_startup(struct uart_port *port) -{ - return 0; -} - -/* port->lock is not held. */ -static void sunhv_shutdown(struct uart_port *port) -{ -} - -/* port->lock is not held. */ -static void sunhv_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - unsigned int baud = uart_get_baud_rate(port, termios, old, 0, 4000000); - unsigned int quot = uart_get_divisor(port, baud); - unsigned int iflag, cflag; - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); - - iflag = termios->c_iflag; - cflag = termios->c_cflag; - - port->ignore_status_mask = 0; - if (iflag & IGNBRK) - port->ignore_status_mask |= IGNORE_BREAK; - if ((cflag & CREAD) == 0) - port->ignore_status_mask |= IGNORE_ALL; - - /* XXX */ - uart_update_timeout(port, cflag, - (port->uartclk / (16 * quot))); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *sunhv_type(struct uart_port *port) -{ - return "SUN4V HCONS"; -} - -static void sunhv_release_port(struct uart_port *port) -{ -} - -static int sunhv_request_port(struct uart_port *port) -{ - return 0; -} - -static void sunhv_config_port(struct uart_port *port, int flags) -{ -} - -static int sunhv_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - return -EINVAL; -} - -static struct uart_ops sunhv_pops = { - .tx_empty = sunhv_tx_empty, - .set_mctrl = sunhv_set_mctrl, - .get_mctrl = sunhv_get_mctrl, - .stop_tx = sunhv_stop_tx, - .start_tx = sunhv_start_tx, - .send_xchar = sunhv_send_xchar, - .stop_rx = sunhv_stop_rx, - .enable_ms = sunhv_enable_ms, - .break_ctl = sunhv_break_ctl, - .startup = sunhv_startup, - .shutdown = sunhv_shutdown, - .set_termios = sunhv_set_termios, - .type = sunhv_type, - .release_port = sunhv_release_port, - .request_port = sunhv_request_port, - .config_port = sunhv_config_port, - .verify_port = sunhv_verify_port, -}; - -static struct uart_driver sunhv_reg = { - .owner = THIS_MODULE, - .driver_name = "sunhv", - .dev_name = "ttyS", - .major = TTY_MAJOR, -}; - -static struct uart_port *sunhv_port; - -/* Copy 's' into the con_write_page, decoding "\n" into - * "\r\n" along the way. We have to return two lengths - * because the caller needs to know how much to advance - * 's' and also how many bytes to output via con_write_page. - */ -static int fill_con_write_page(const char *s, unsigned int n, - unsigned long *page_bytes) -{ - const char *orig_s = s; - char *p = con_write_page; - int left = PAGE_SIZE; - - while (n--) { - if (*s == '\n') { - if (left < 2) - break; - *p++ = '\r'; - left--; - } else if (left < 1) - break; - *p++ = *s++; - left--; - } - *page_bytes = p - con_write_page; - return s - orig_s; -} - -static void sunhv_console_write_paged(struct console *con, const char *s, unsigned n) -{ - struct uart_port *port = sunhv_port; - unsigned long flags; - int locked = 1; - - local_irq_save(flags); - if (port->sysrq) { - locked = 0; - } else if (oops_in_progress) { - locked = spin_trylock(&port->lock); - } else - spin_lock(&port->lock); - - while (n > 0) { - unsigned long ra = __pa(con_write_page); - unsigned long page_bytes; - unsigned int cpy = fill_con_write_page(s, n, - &page_bytes); - - n -= cpy; - s += cpy; - while (page_bytes > 0) { - unsigned long written; - int limit = 1000000; - - while (limit--) { - unsigned long stat; - - stat = sun4v_con_write(ra, page_bytes, - &written); - if (stat == HV_EOK) - break; - udelay(1); - } - if (limit < 0) - break; - page_bytes -= written; - ra += written; - } - } - - if (locked) - spin_unlock(&port->lock); - local_irq_restore(flags); -} - -static inline void sunhv_console_putchar(struct uart_port *port, char c) -{ - int limit = 1000000; - - while (limit-- > 0) { - long status = sun4v_con_putchar(c); - if (status == HV_EOK) - break; - udelay(1); - } -} - -static void sunhv_console_write_bychar(struct console *con, const char *s, unsigned n) -{ - struct uart_port *port = sunhv_port; - unsigned long flags; - int i, locked = 1; - - local_irq_save(flags); - if (port->sysrq) { - locked = 0; - } else if (oops_in_progress) { - locked = spin_trylock(&port->lock); - } else - spin_lock(&port->lock); - - for (i = 0; i < n; i++) { - if (*s == '\n') - sunhv_console_putchar(port, '\r'); - sunhv_console_putchar(port, *s++); - } - - if (locked) - spin_unlock(&port->lock); - local_irq_restore(flags); -} - -static struct console sunhv_console = { - .name = "ttyHV", - .write = sunhv_console_write_bychar, - .device = uart_console_device, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &sunhv_reg, -}; - -static int __devinit hv_probe(struct platform_device *op, const struct of_device_id *match) -{ - struct uart_port *port; - unsigned long minor; - int err; - - if (op->archdata.irqs[0] == 0xffffffff) - return -ENODEV; - - port = kzalloc(sizeof(struct uart_port), GFP_KERNEL); - if (unlikely(!port)) - return -ENOMEM; - - minor = 1; - if (sun4v_hvapi_register(HV_GRP_CORE, 1, &minor) == 0 && - minor >= 1) { - err = -ENOMEM; - con_write_page = kzalloc(PAGE_SIZE, GFP_KERNEL); - if (!con_write_page) - goto out_free_port; - - con_read_page = kzalloc(PAGE_SIZE, GFP_KERNEL); - if (!con_read_page) - goto out_free_con_write_page; - - sunhv_console.write = sunhv_console_write_paged; - sunhv_ops = &bywrite_ops; - } - - sunhv_port = port; - - port->line = 0; - port->ops = &sunhv_pops; - port->type = PORT_SUNHV; - port->uartclk = ( 29491200 / 16 ); /* arbitrary */ - - port->membase = (unsigned char __iomem *) __pa(port); - - port->irq = op->archdata.irqs[0]; - - port->dev = &op->dev; - - err = sunserial_register_minors(&sunhv_reg, 1); - if (err) - goto out_free_con_read_page; - - sunserial_console_match(&sunhv_console, op->dev.of_node, - &sunhv_reg, port->line, false); - - err = uart_add_one_port(&sunhv_reg, port); - if (err) - goto out_unregister_driver; - - err = request_irq(port->irq, sunhv_interrupt, 0, "hvcons", port); - if (err) - goto out_remove_port; - - dev_set_drvdata(&op->dev, port); - - return 0; - -out_remove_port: - uart_remove_one_port(&sunhv_reg, port); - -out_unregister_driver: - sunserial_unregister_minors(&sunhv_reg, 1); - -out_free_con_read_page: - kfree(con_read_page); - -out_free_con_write_page: - kfree(con_write_page); - -out_free_port: - kfree(port); - sunhv_port = NULL; - return err; -} - -static int __devexit hv_remove(struct platform_device *dev) -{ - struct uart_port *port = dev_get_drvdata(&dev->dev); - - free_irq(port->irq, port); - - uart_remove_one_port(&sunhv_reg, port); - - sunserial_unregister_minors(&sunhv_reg, 1); - - kfree(port); - sunhv_port = NULL; - - dev_set_drvdata(&dev->dev, NULL); - - return 0; -} - -static const struct of_device_id hv_match[] = { - { - .name = "console", - .compatible = "qcn", - }, - { - .name = "console", - .compatible = "SUNW,sun4v-console", - }, - {}, -}; -MODULE_DEVICE_TABLE(of, hv_match); - -static struct of_platform_driver hv_driver = { - .driver = { - .name = "hv", - .owner = THIS_MODULE, - .of_match_table = hv_match, - }, - .probe = hv_probe, - .remove = __devexit_p(hv_remove), -}; - -static int __init sunhv_init(void) -{ - if (tlb_type != hypervisor) - return -ENODEV; - - return of_register_platform_driver(&hv_driver); -} - -static void __exit sunhv_exit(void) -{ - of_unregister_platform_driver(&hv_driver); -} - -module_init(sunhv_init); -module_exit(sunhv_exit); - -MODULE_AUTHOR("David S. Miller"); -MODULE_DESCRIPTION("SUN4V Hypervisor console driver"); -MODULE_VERSION("2.0"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/sunsab.c b/drivers/serial/sunsab.c deleted file mode 100644 index 5b246b18f42f..000000000000 --- a/drivers/serial/sunsab.c +++ /dev/null @@ -1,1152 +0,0 @@ -/* sunsab.c: ASYNC Driver for the SIEMENS SAB82532 DUSCC. - * - * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) - * Copyright (C) 2002, 2006 David S. Miller (davem@davemloft.net) - * - * Rewrote buffer handling to use CIRC(Circular Buffer) macros. - * Maxim Krasnyanskiy <maxk@qualcomm.com> - * - * Fixed to use tty_get_baud_rate, and to allow for arbitrary baud - * rates to be programmed into the UART. Also eliminated a lot of - * duplicated code in the console setup. - * Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12 - * - * Ported to new 2.5.x UART layer. - * David S. Miller <davem@davemloft.net> - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/major.h> -#include <linux/string.h> -#include <linux/ptrace.h> -#include <linux/ioport.h> -#include <linux/circ_buf.h> -#include <linux/serial.h> -#include <linux/sysrq.h> -#include <linux/console.h> -#include <linux/spinlock.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/of_device.h> - -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/prom.h> - -#if defined(CONFIG_SERIAL_SUNSAB_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/serial_core.h> - -#include "suncore.h" -#include "sunsab.h" - -struct uart_sunsab_port { - struct uart_port port; /* Generic UART port */ - union sab82532_async_regs __iomem *regs; /* Chip registers */ - unsigned long irqflags; /* IRQ state flags */ - int dsr; /* Current DSR state */ - unsigned int cec_timeout; /* Chip poll timeout... */ - unsigned int tec_timeout; /* likewise */ - unsigned char interrupt_mask0;/* ISR0 masking */ - unsigned char interrupt_mask1;/* ISR1 masking */ - unsigned char pvr_dtr_bit; /* Which PVR bit is DTR */ - unsigned char pvr_dsr_bit; /* Which PVR bit is DSR */ - unsigned int gis_shift; - int type; /* SAB82532 version */ - - /* Setting configuration bits while the transmitter is active - * can cause garbage characters to get emitted by the chip. - * Therefore, we cache such writes here and do the real register - * write the next time the transmitter becomes idle. - */ - unsigned int cached_ebrg; - unsigned char cached_mode; - unsigned char cached_pvr; - unsigned char cached_dafo; -}; - -/* - * This assumes you have a 29.4912 MHz clock for your UART. - */ -#define SAB_BASE_BAUD ( 29491200 / 16 ) - -static char *sab82532_version[16] = { - "V1.0", "V2.0", "V3.2", "V(0x03)", - "V(0x04)", "V(0x05)", "V(0x06)", "V(0x07)", - "V(0x08)", "V(0x09)", "V(0x0a)", "V(0x0b)", - "V(0x0c)", "V(0x0d)", "V(0x0e)", "V(0x0f)" -}; - -#define SAB82532_MAX_TEC_TIMEOUT 200000 /* 1 character time (at 50 baud) */ -#define SAB82532_MAX_CEC_TIMEOUT 50000 /* 2.5 TX CLKs (at 50 baud) */ - -#define SAB82532_RECV_FIFO_SIZE 32 /* Standard async fifo sizes */ -#define SAB82532_XMIT_FIFO_SIZE 32 - -static __inline__ void sunsab_tec_wait(struct uart_sunsab_port *up) -{ - int timeout = up->tec_timeout; - - while ((readb(&up->regs->r.star) & SAB82532_STAR_TEC) && --timeout) - udelay(1); -} - -static __inline__ void sunsab_cec_wait(struct uart_sunsab_port *up) -{ - int timeout = up->cec_timeout; - - while ((readb(&up->regs->r.star) & SAB82532_STAR_CEC) && --timeout) - udelay(1); -} - -static struct tty_struct * -receive_chars(struct uart_sunsab_port *up, - union sab82532_irq_status *stat) -{ - struct tty_struct *tty = NULL; - unsigned char buf[32]; - int saw_console_brk = 0; - int free_fifo = 0; - int count = 0; - int i; - - if (up->port.state != NULL) /* Unopened serial console */ - tty = up->port.state->port.tty; - - /* Read number of BYTES (Character + Status) available. */ - if (stat->sreg.isr0 & SAB82532_ISR0_RPF) { - count = SAB82532_RECV_FIFO_SIZE; - free_fifo++; - } - - if (stat->sreg.isr0 & SAB82532_ISR0_TCD) { - count = readb(&up->regs->r.rbcl) & (SAB82532_RECV_FIFO_SIZE - 1); - free_fifo++; - } - - /* Issue a FIFO read command in case we where idle. */ - if (stat->sreg.isr0 & SAB82532_ISR0_TIME) { - sunsab_cec_wait(up); - writeb(SAB82532_CMDR_RFRD, &up->regs->w.cmdr); - return tty; - } - - if (stat->sreg.isr0 & SAB82532_ISR0_RFO) - free_fifo++; - - /* Read the FIFO. */ - for (i = 0; i < count; i++) - buf[i] = readb(&up->regs->r.rfifo[i]); - - /* Issue Receive Message Complete command. */ - if (free_fifo) { - sunsab_cec_wait(up); - writeb(SAB82532_CMDR_RMC, &up->regs->w.cmdr); - } - - /* Count may be zero for BRK, so we check for it here */ - if ((stat->sreg.isr1 & SAB82532_ISR1_BRK) && - (up->port.line == up->port.cons->index)) - saw_console_brk = 1; - - for (i = 0; i < count; i++) { - unsigned char ch = buf[i], flag; - - if (tty == NULL) { - uart_handle_sysrq_char(&up->port, ch); - continue; - } - - flag = TTY_NORMAL; - up->port.icount.rx++; - - if (unlikely(stat->sreg.isr0 & (SAB82532_ISR0_PERR | - SAB82532_ISR0_FERR | - SAB82532_ISR0_RFO)) || - unlikely(stat->sreg.isr1 & SAB82532_ISR1_BRK)) { - /* - * For statistics only - */ - if (stat->sreg.isr1 & SAB82532_ISR1_BRK) { - stat->sreg.isr0 &= ~(SAB82532_ISR0_PERR | - SAB82532_ISR0_FERR); - up->port.icount.brk++; - /* - * We do the SysRQ and SAK checking - * here because otherwise the break - * may get masked by ignore_status_mask - * or read_status_mask. - */ - if (uart_handle_break(&up->port)) - continue; - } else if (stat->sreg.isr0 & SAB82532_ISR0_PERR) - up->port.icount.parity++; - else if (stat->sreg.isr0 & SAB82532_ISR0_FERR) - up->port.icount.frame++; - if (stat->sreg.isr0 & SAB82532_ISR0_RFO) - up->port.icount.overrun++; - - /* - * Mask off conditions which should be ingored. - */ - stat->sreg.isr0 &= (up->port.read_status_mask & 0xff); - stat->sreg.isr1 &= ((up->port.read_status_mask >> 8) & 0xff); - - if (stat->sreg.isr1 & SAB82532_ISR1_BRK) { - flag = TTY_BREAK; - } else if (stat->sreg.isr0 & SAB82532_ISR0_PERR) - flag = TTY_PARITY; - else if (stat->sreg.isr0 & SAB82532_ISR0_FERR) - flag = TTY_FRAME; - } - - if (uart_handle_sysrq_char(&up->port, ch)) - continue; - - if ((stat->sreg.isr0 & (up->port.ignore_status_mask & 0xff)) == 0 && - (stat->sreg.isr1 & ((up->port.ignore_status_mask >> 8) & 0xff)) == 0) - tty_insert_flip_char(tty, ch, flag); - if (stat->sreg.isr0 & SAB82532_ISR0_RFO) - tty_insert_flip_char(tty, 0, TTY_OVERRUN); - } - - if (saw_console_brk) - sun_do_break(); - - return tty; -} - -static void sunsab_stop_tx(struct uart_port *); -static void sunsab_tx_idle(struct uart_sunsab_port *); - -static void transmit_chars(struct uart_sunsab_port *up, - union sab82532_irq_status *stat) -{ - struct circ_buf *xmit = &up->port.state->xmit; - int i; - - if (stat->sreg.isr1 & SAB82532_ISR1_ALLS) { - up->interrupt_mask1 |= SAB82532_IMR1_ALLS; - writeb(up->interrupt_mask1, &up->regs->w.imr1); - set_bit(SAB82532_ALLS, &up->irqflags); - } - -#if 0 /* bde@nwlink.com says this check causes problems */ - if (!(stat->sreg.isr1 & SAB82532_ISR1_XPR)) - return; -#endif - - if (!(readb(&up->regs->r.star) & SAB82532_STAR_XFW)) - return; - - set_bit(SAB82532_XPR, &up->irqflags); - sunsab_tx_idle(up); - - if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) { - up->interrupt_mask1 |= SAB82532_IMR1_XPR; - writeb(up->interrupt_mask1, &up->regs->w.imr1); - return; - } - - up->interrupt_mask1 &= ~(SAB82532_IMR1_ALLS|SAB82532_IMR1_XPR); - writeb(up->interrupt_mask1, &up->regs->w.imr1); - clear_bit(SAB82532_ALLS, &up->irqflags); - - /* Stuff 32 bytes into Transmit FIFO. */ - clear_bit(SAB82532_XPR, &up->irqflags); - for (i = 0; i < up->port.fifosize; i++) { - writeb(xmit->buf[xmit->tail], - &up->regs->w.xfifo[i]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - up->port.icount.tx++; - if (uart_circ_empty(xmit)) - break; - } - - /* Issue a Transmit Frame command. */ - sunsab_cec_wait(up); - writeb(SAB82532_CMDR_XF, &up->regs->w.cmdr); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&up->port); - - if (uart_circ_empty(xmit)) - sunsab_stop_tx(&up->port); -} - -static void check_status(struct uart_sunsab_port *up, - union sab82532_irq_status *stat) -{ - if (stat->sreg.isr0 & SAB82532_ISR0_CDSC) - uart_handle_dcd_change(&up->port, - !(readb(&up->regs->r.vstr) & SAB82532_VSTR_CD)); - - if (stat->sreg.isr1 & SAB82532_ISR1_CSC) - uart_handle_cts_change(&up->port, - (readb(&up->regs->r.star) & SAB82532_STAR_CTS)); - - if ((readb(&up->regs->r.pvr) & up->pvr_dsr_bit) ^ up->dsr) { - up->dsr = (readb(&up->regs->r.pvr) & up->pvr_dsr_bit) ? 0 : 1; - up->port.icount.dsr++; - } - - wake_up_interruptible(&up->port.state->port.delta_msr_wait); -} - -static irqreturn_t sunsab_interrupt(int irq, void *dev_id) -{ - struct uart_sunsab_port *up = dev_id; - struct tty_struct *tty; - union sab82532_irq_status status; - unsigned long flags; - unsigned char gis; - - spin_lock_irqsave(&up->port.lock, flags); - - status.stat = 0; - gis = readb(&up->regs->r.gis) >> up->gis_shift; - if (gis & 1) - status.sreg.isr0 = readb(&up->regs->r.isr0); - if (gis & 2) - status.sreg.isr1 = readb(&up->regs->r.isr1); - - tty = NULL; - if (status.stat) { - if ((status.sreg.isr0 & (SAB82532_ISR0_TCD | SAB82532_ISR0_TIME | - SAB82532_ISR0_RFO | SAB82532_ISR0_RPF)) || - (status.sreg.isr1 & SAB82532_ISR1_BRK)) - tty = receive_chars(up, &status); - if ((status.sreg.isr0 & SAB82532_ISR0_CDSC) || - (status.sreg.isr1 & SAB82532_ISR1_CSC)) - check_status(up, &status); - if (status.sreg.isr1 & (SAB82532_ISR1_ALLS | SAB82532_ISR1_XPR)) - transmit_chars(up, &status); - } - - spin_unlock_irqrestore(&up->port.lock, flags); - - if (tty) - tty_flip_buffer_push(tty); - - return IRQ_HANDLED; -} - -/* port->lock is not held. */ -static unsigned int sunsab_tx_empty(struct uart_port *port) -{ - struct uart_sunsab_port *up = (struct uart_sunsab_port *) port; - int ret; - - /* Do not need a lock for a state test like this. */ - if (test_bit(SAB82532_ALLS, &up->irqflags)) - ret = TIOCSER_TEMT; - else - ret = 0; - - return ret; -} - -/* port->lock held by caller. */ -static void sunsab_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct uart_sunsab_port *up = (struct uart_sunsab_port *) port; - - if (mctrl & TIOCM_RTS) { - up->cached_mode &= ~SAB82532_MODE_FRTS; - up->cached_mode |= SAB82532_MODE_RTS; - } else { - up->cached_mode |= (SAB82532_MODE_FRTS | - SAB82532_MODE_RTS); - } - if (mctrl & TIOCM_DTR) { - up->cached_pvr &= ~(up->pvr_dtr_bit); - } else { - up->cached_pvr |= up->pvr_dtr_bit; - } - - set_bit(SAB82532_REGS_PENDING, &up->irqflags); - if (test_bit(SAB82532_XPR, &up->irqflags)) - sunsab_tx_idle(up); -} - -/* port->lock is held by caller and interrupts are disabled. */ -static unsigned int sunsab_get_mctrl(struct uart_port *port) -{ - struct uart_sunsab_port *up = (struct uart_sunsab_port *) port; - unsigned char val; - unsigned int result; - - result = 0; - - val = readb(&up->regs->r.pvr); - result |= (val & up->pvr_dsr_bit) ? 0 : TIOCM_DSR; - - val = readb(&up->regs->r.vstr); - result |= (val & SAB82532_VSTR_CD) ? 0 : TIOCM_CAR; - - val = readb(&up->regs->r.star); - result |= (val & SAB82532_STAR_CTS) ? TIOCM_CTS : 0; - - return result; -} - -/* port->lock held by caller. */ -static void sunsab_stop_tx(struct uart_port *port) -{ - struct uart_sunsab_port *up = (struct uart_sunsab_port *) port; - - up->interrupt_mask1 |= SAB82532_IMR1_XPR; - writeb(up->interrupt_mask1, &up->regs->w.imr1); -} - -/* port->lock held by caller. */ -static void sunsab_tx_idle(struct uart_sunsab_port *up) -{ - if (test_bit(SAB82532_REGS_PENDING, &up->irqflags)) { - u8 tmp; - - clear_bit(SAB82532_REGS_PENDING, &up->irqflags); - writeb(up->cached_mode, &up->regs->rw.mode); - writeb(up->cached_pvr, &up->regs->rw.pvr); - writeb(up->cached_dafo, &up->regs->w.dafo); - - writeb(up->cached_ebrg & 0xff, &up->regs->w.bgr); - tmp = readb(&up->regs->rw.ccr2); - tmp &= ~0xc0; - tmp |= (up->cached_ebrg >> 2) & 0xc0; - writeb(tmp, &up->regs->rw.ccr2); - } -} - -/* port->lock held by caller. */ -static void sunsab_start_tx(struct uart_port *port) -{ - struct uart_sunsab_port *up = (struct uart_sunsab_port *) port; - struct circ_buf *xmit = &up->port.state->xmit; - int i; - - up->interrupt_mask1 &= ~(SAB82532_IMR1_ALLS|SAB82532_IMR1_XPR); - writeb(up->interrupt_mask1, &up->regs->w.imr1); - - if (!test_bit(SAB82532_XPR, &up->irqflags)) - return; - - clear_bit(SAB82532_ALLS, &up->irqflags); - clear_bit(SAB82532_XPR, &up->irqflags); - - for (i = 0; i < up->port.fifosize; i++) { - writeb(xmit->buf[xmit->tail], - &up->regs->w.xfifo[i]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - up->port.icount.tx++; - if (uart_circ_empty(xmit)) - break; - } - - /* Issue a Transmit Frame command. */ - sunsab_cec_wait(up); - writeb(SAB82532_CMDR_XF, &up->regs->w.cmdr); -} - -/* port->lock is not held. */ -static void sunsab_send_xchar(struct uart_port *port, char ch) -{ - struct uart_sunsab_port *up = (struct uart_sunsab_port *) port; - unsigned long flags; - - spin_lock_irqsave(&up->port.lock, flags); - - sunsab_tec_wait(up); - writeb(ch, &up->regs->w.tic); - - spin_unlock_irqrestore(&up->port.lock, flags); -} - -/* port->lock held by caller. */ -static void sunsab_stop_rx(struct uart_port *port) -{ - struct uart_sunsab_port *up = (struct uart_sunsab_port *) port; - - up->interrupt_mask0 |= SAB82532_IMR0_TCD; - writeb(up->interrupt_mask1, &up->regs->w.imr0); -} - -/* port->lock held by caller. */ -static void sunsab_enable_ms(struct uart_port *port) -{ - /* For now we always receive these interrupts. */ -} - -/* port->lock is not held. */ -static void sunsab_break_ctl(struct uart_port *port, int break_state) -{ - struct uart_sunsab_port *up = (struct uart_sunsab_port *) port; - unsigned long flags; - unsigned char val; - - spin_lock_irqsave(&up->port.lock, flags); - - val = up->cached_dafo; - if (break_state) - val |= SAB82532_DAFO_XBRK; - else - val &= ~SAB82532_DAFO_XBRK; - up->cached_dafo = val; - - set_bit(SAB82532_REGS_PENDING, &up->irqflags); - if (test_bit(SAB82532_XPR, &up->irqflags)) - sunsab_tx_idle(up); - - spin_unlock_irqrestore(&up->port.lock, flags); -} - -/* port->lock is not held. */ -static int sunsab_startup(struct uart_port *port) -{ - struct uart_sunsab_port *up = (struct uart_sunsab_port *) port; - unsigned long flags; - unsigned char tmp; - int err = request_irq(up->port.irq, sunsab_interrupt, - IRQF_SHARED, "sab", up); - if (err) - return err; - - spin_lock_irqsave(&up->port.lock, flags); - - /* - * Wait for any commands or immediate characters - */ - sunsab_cec_wait(up); - sunsab_tec_wait(up); - - /* - * Clear the FIFO buffers. - */ - writeb(SAB82532_CMDR_RRES, &up->regs->w.cmdr); - sunsab_cec_wait(up); - writeb(SAB82532_CMDR_XRES, &up->regs->w.cmdr); - - /* - * Clear the interrupt registers. - */ - (void) readb(&up->regs->r.isr0); - (void) readb(&up->regs->r.isr1); - - /* - * Now, initialize the UART - */ - writeb(0, &up->regs->w.ccr0); /* power-down */ - writeb(SAB82532_CCR0_MCE | SAB82532_CCR0_SC_NRZ | - SAB82532_CCR0_SM_ASYNC, &up->regs->w.ccr0); - writeb(SAB82532_CCR1_ODS | SAB82532_CCR1_BCR | 7, &up->regs->w.ccr1); - writeb(SAB82532_CCR2_BDF | SAB82532_CCR2_SSEL | - SAB82532_CCR2_TOE, &up->regs->w.ccr2); - writeb(0, &up->regs->w.ccr3); - writeb(SAB82532_CCR4_MCK4 | SAB82532_CCR4_EBRG, &up->regs->w.ccr4); - up->cached_mode = (SAB82532_MODE_RTS | SAB82532_MODE_FCTS | - SAB82532_MODE_RAC); - writeb(up->cached_mode, &up->regs->w.mode); - writeb(SAB82532_RFC_DPS|SAB82532_RFC_RFTH_32, &up->regs->w.rfc); - - tmp = readb(&up->regs->rw.ccr0); - tmp |= SAB82532_CCR0_PU; /* power-up */ - writeb(tmp, &up->regs->rw.ccr0); - - /* - * Finally, enable interrupts - */ - up->interrupt_mask0 = (SAB82532_IMR0_PERR | SAB82532_IMR0_FERR | - SAB82532_IMR0_PLLA); - writeb(up->interrupt_mask0, &up->regs->w.imr0); - up->interrupt_mask1 = (SAB82532_IMR1_BRKT | SAB82532_IMR1_ALLS | - SAB82532_IMR1_XOFF | SAB82532_IMR1_TIN | - SAB82532_IMR1_CSC | SAB82532_IMR1_XON | - SAB82532_IMR1_XPR); - writeb(up->interrupt_mask1, &up->regs->w.imr1); - set_bit(SAB82532_ALLS, &up->irqflags); - set_bit(SAB82532_XPR, &up->irqflags); - - spin_unlock_irqrestore(&up->port.lock, flags); - - return 0; -} - -/* port->lock is not held. */ -static void sunsab_shutdown(struct uart_port *port) -{ - struct uart_sunsab_port *up = (struct uart_sunsab_port *) port; - unsigned long flags; - - spin_lock_irqsave(&up->port.lock, flags); - - /* Disable Interrupts */ - up->interrupt_mask0 = 0xff; - writeb(up->interrupt_mask0, &up->regs->w.imr0); - up->interrupt_mask1 = 0xff; - writeb(up->interrupt_mask1, &up->regs->w.imr1); - - /* Disable break condition */ - up->cached_dafo = readb(&up->regs->rw.dafo); - up->cached_dafo &= ~SAB82532_DAFO_XBRK; - writeb(up->cached_dafo, &up->regs->rw.dafo); - - /* Disable Receiver */ - up->cached_mode &= ~SAB82532_MODE_RAC; - writeb(up->cached_mode, &up->regs->rw.mode); - - /* - * XXX FIXME - * - * If the chip is powered down here the system hangs/crashes during - * reboot or shutdown. This needs to be investigated further, - * similar behaviour occurs in 2.4 when the driver is configured - * as a module only. One hint may be that data is sometimes - * transmitted at 9600 baud during shutdown (regardless of the - * speed the chip was configured for when the port was open). - */ -#if 0 - /* Power Down */ - tmp = readb(&up->regs->rw.ccr0); - tmp &= ~SAB82532_CCR0_PU; - writeb(tmp, &up->regs->rw.ccr0); -#endif - - spin_unlock_irqrestore(&up->port.lock, flags); - free_irq(up->port.irq, up); -} - -/* - * This is used to figure out the divisor speeds. - * - * The formula is: Baud = SAB_BASE_BAUD / ((N + 1) * (1 << M)), - * - * with 0 <= N < 64 and 0 <= M < 16 - */ - -static void calc_ebrg(int baud, int *n_ret, int *m_ret) -{ - int n, m; - - if (baud == 0) { - *n_ret = 0; - *m_ret = 0; - return; - } - - /* - * We scale numbers by 10 so that we get better accuracy - * without having to use floating point. Here we increment m - * until n is within the valid range. - */ - n = (SAB_BASE_BAUD * 10) / baud; - m = 0; - while (n >= 640) { - n = n / 2; - m++; - } - n = (n+5) / 10; - /* - * We try very hard to avoid speeds with M == 0 since they may - * not work correctly for XTAL frequences above 10 MHz. - */ - if ((m == 0) && ((n & 1) == 0)) { - n = n / 2; - m++; - } - *n_ret = n - 1; - *m_ret = m; -} - -/* Internal routine, port->lock is held and local interrupts are disabled. */ -static void sunsab_convert_to_sab(struct uart_sunsab_port *up, unsigned int cflag, - unsigned int iflag, unsigned int baud, - unsigned int quot) -{ - unsigned char dafo; - int bits, n, m; - - /* Byte size and parity */ - switch (cflag & CSIZE) { - case CS5: dafo = SAB82532_DAFO_CHL5; bits = 7; break; - case CS6: dafo = SAB82532_DAFO_CHL6; bits = 8; break; - case CS7: dafo = SAB82532_DAFO_CHL7; bits = 9; break; - case CS8: dafo = SAB82532_DAFO_CHL8; bits = 10; break; - /* Never happens, but GCC is too dumb to figure it out */ - default: dafo = SAB82532_DAFO_CHL5; bits = 7; break; - } - - if (cflag & CSTOPB) { - dafo |= SAB82532_DAFO_STOP; - bits++; - } - - if (cflag & PARENB) { - dafo |= SAB82532_DAFO_PARE; - bits++; - } - - if (cflag & PARODD) { - dafo |= SAB82532_DAFO_PAR_ODD; - } else { - dafo |= SAB82532_DAFO_PAR_EVEN; - } - up->cached_dafo = dafo; - - calc_ebrg(baud, &n, &m); - - up->cached_ebrg = n | (m << 6); - - up->tec_timeout = (10 * 1000000) / baud; - up->cec_timeout = up->tec_timeout >> 2; - - /* CTS flow control flags */ - /* We encode read_status_mask and ignore_status_mask like so: - * - * --------------------- - * | ... | ISR1 | ISR0 | - * --------------------- - * .. 15 8 7 0 - */ - - up->port.read_status_mask = (SAB82532_ISR0_TCD | SAB82532_ISR0_TIME | - SAB82532_ISR0_RFO | SAB82532_ISR0_RPF | - SAB82532_ISR0_CDSC); - up->port.read_status_mask |= (SAB82532_ISR1_CSC | - SAB82532_ISR1_ALLS | - SAB82532_ISR1_XPR) << 8; - if (iflag & INPCK) - up->port.read_status_mask |= (SAB82532_ISR0_PERR | - SAB82532_ISR0_FERR); - if (iflag & (BRKINT | PARMRK)) - up->port.read_status_mask |= (SAB82532_ISR1_BRK << 8); - - /* - * Characteres to ignore - */ - up->port.ignore_status_mask = 0; - if (iflag & IGNPAR) - up->port.ignore_status_mask |= (SAB82532_ISR0_PERR | - SAB82532_ISR0_FERR); - if (iflag & IGNBRK) { - up->port.ignore_status_mask |= (SAB82532_ISR1_BRK << 8); - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (iflag & IGNPAR) - up->port.ignore_status_mask |= SAB82532_ISR0_RFO; - } - - /* - * ignore all characters if CREAD is not set - */ - if ((cflag & CREAD) == 0) - up->port.ignore_status_mask |= (SAB82532_ISR0_RPF | - SAB82532_ISR0_TCD); - - uart_update_timeout(&up->port, cflag, - (up->port.uartclk / (16 * quot))); - - /* Now schedule a register update when the chip's - * transmitter is idle. - */ - up->cached_mode |= SAB82532_MODE_RAC; - set_bit(SAB82532_REGS_PENDING, &up->irqflags); - if (test_bit(SAB82532_XPR, &up->irqflags)) - sunsab_tx_idle(up); -} - -/* port->lock is not held. */ -static void sunsab_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct uart_sunsab_port *up = (struct uart_sunsab_port *) port; - unsigned long flags; - unsigned int baud = uart_get_baud_rate(port, termios, old, 0, 4000000); - unsigned int quot = uart_get_divisor(port, baud); - - spin_lock_irqsave(&up->port.lock, flags); - sunsab_convert_to_sab(up, termios->c_cflag, termios->c_iflag, baud, quot); - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static const char *sunsab_type(struct uart_port *port) -{ - struct uart_sunsab_port *up = (void *)port; - static char buf[36]; - - sprintf(buf, "SAB82532 %s", sab82532_version[up->type]); - return buf; -} - -static void sunsab_release_port(struct uart_port *port) -{ -} - -static int sunsab_request_port(struct uart_port *port) -{ - return 0; -} - -static void sunsab_config_port(struct uart_port *port, int flags) -{ -} - -static int sunsab_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - return -EINVAL; -} - -static struct uart_ops sunsab_pops = { - .tx_empty = sunsab_tx_empty, - .set_mctrl = sunsab_set_mctrl, - .get_mctrl = sunsab_get_mctrl, - .stop_tx = sunsab_stop_tx, - .start_tx = sunsab_start_tx, - .send_xchar = sunsab_send_xchar, - .stop_rx = sunsab_stop_rx, - .enable_ms = sunsab_enable_ms, - .break_ctl = sunsab_break_ctl, - .startup = sunsab_startup, - .shutdown = sunsab_shutdown, - .set_termios = sunsab_set_termios, - .type = sunsab_type, - .release_port = sunsab_release_port, - .request_port = sunsab_request_port, - .config_port = sunsab_config_port, - .verify_port = sunsab_verify_port, -}; - -static struct uart_driver sunsab_reg = { - .owner = THIS_MODULE, - .driver_name = "sunsab", - .dev_name = "ttyS", - .major = TTY_MAJOR, -}; - -static struct uart_sunsab_port *sunsab_ports; - -#ifdef CONFIG_SERIAL_SUNSAB_CONSOLE - -static void sunsab_console_putchar(struct uart_port *port, int c) -{ - struct uart_sunsab_port *up = (struct uart_sunsab_port *)port; - - sunsab_tec_wait(up); - writeb(c, &up->regs->w.tic); -} - -static void sunsab_console_write(struct console *con, const char *s, unsigned n) -{ - struct uart_sunsab_port *up = &sunsab_ports[con->index]; - unsigned long flags; - int locked = 1; - - local_irq_save(flags); - if (up->port.sysrq) { - locked = 0; - } else if (oops_in_progress) { - locked = spin_trylock(&up->port.lock); - } else - spin_lock(&up->port.lock); - - uart_console_write(&up->port, s, n, sunsab_console_putchar); - sunsab_tec_wait(up); - - if (locked) - spin_unlock(&up->port.lock); - local_irq_restore(flags); -} - -static int sunsab_console_setup(struct console *con, char *options) -{ - struct uart_sunsab_port *up = &sunsab_ports[con->index]; - unsigned long flags; - unsigned int baud, quot; - - /* - * The console framework calls us for each and every port - * registered. Defer the console setup until the requested - * port has been properly discovered. A bit of a hack, - * though... - */ - if (up->port.type != PORT_SUNSAB) - return -1; - - printk("Console: ttyS%d (SAB82532)\n", - (sunsab_reg.minor - 64) + con->index); - - sunserial_console_termios(con, up->port.dev->of_node); - - switch (con->cflag & CBAUD) { - case B150: baud = 150; break; - case B300: baud = 300; break; - case B600: baud = 600; break; - case B1200: baud = 1200; break; - case B2400: baud = 2400; break; - case B4800: baud = 4800; break; - default: case B9600: baud = 9600; break; - case B19200: baud = 19200; break; - case B38400: baud = 38400; break; - case B57600: baud = 57600; break; - case B115200: baud = 115200; break; - case B230400: baud = 230400; break; - case B460800: baud = 460800; break; - }; - - /* - * Temporary fix. - */ - spin_lock_init(&up->port.lock); - - /* - * Initialize the hardware - */ - sunsab_startup(&up->port); - - spin_lock_irqsave(&up->port.lock, flags); - - /* - * Finally, enable interrupts - */ - up->interrupt_mask0 = SAB82532_IMR0_PERR | SAB82532_IMR0_FERR | - SAB82532_IMR0_PLLA | SAB82532_IMR0_CDSC; - writeb(up->interrupt_mask0, &up->regs->w.imr0); - up->interrupt_mask1 = SAB82532_IMR1_BRKT | SAB82532_IMR1_ALLS | - SAB82532_IMR1_XOFF | SAB82532_IMR1_TIN | - SAB82532_IMR1_CSC | SAB82532_IMR1_XON | - SAB82532_IMR1_XPR; - writeb(up->interrupt_mask1, &up->regs->w.imr1); - - quot = uart_get_divisor(&up->port, baud); - sunsab_convert_to_sab(up, con->cflag, 0, baud, quot); - sunsab_set_mctrl(&up->port, TIOCM_DTR | TIOCM_RTS); - - spin_unlock_irqrestore(&up->port.lock, flags); - - return 0; -} - -static struct console sunsab_console = { - .name = "ttyS", - .write = sunsab_console_write, - .device = uart_console_device, - .setup = sunsab_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &sunsab_reg, -}; - -static inline struct console *SUNSAB_CONSOLE(void) -{ - return &sunsab_console; -} -#else -#define SUNSAB_CONSOLE() (NULL) -#define sunsab_console_init() do { } while (0) -#endif - -static int __devinit sunsab_init_one(struct uart_sunsab_port *up, - struct platform_device *op, - unsigned long offset, - int line) -{ - up->port.line = line; - up->port.dev = &op->dev; - - up->port.mapbase = op->resource[0].start + offset; - up->port.membase = of_ioremap(&op->resource[0], offset, - sizeof(union sab82532_async_regs), - "sab"); - if (!up->port.membase) - return -ENOMEM; - up->regs = (union sab82532_async_regs __iomem *) up->port.membase; - - up->port.irq = op->archdata.irqs[0]; - - up->port.fifosize = SAB82532_XMIT_FIFO_SIZE; - up->port.iotype = UPIO_MEM; - - writeb(SAB82532_IPC_IC_ACT_LOW, &up->regs->w.ipc); - - up->port.ops = &sunsab_pops; - up->port.type = PORT_SUNSAB; - up->port.uartclk = SAB_BASE_BAUD; - - up->type = readb(&up->regs->r.vstr) & 0x0f; - writeb(~((1 << 1) | (1 << 2) | (1 << 4)), &up->regs->w.pcr); - writeb(0xff, &up->regs->w.pim); - if ((up->port.line & 0x1) == 0) { - up->pvr_dsr_bit = (1 << 0); - up->pvr_dtr_bit = (1 << 1); - up->gis_shift = 2; - } else { - up->pvr_dsr_bit = (1 << 3); - up->pvr_dtr_bit = (1 << 2); - up->gis_shift = 0; - } - up->cached_pvr = (1 << 1) | (1 << 2) | (1 << 4); - writeb(up->cached_pvr, &up->regs->w.pvr); - up->cached_mode = readb(&up->regs->rw.mode); - up->cached_mode |= SAB82532_MODE_FRTS; - writeb(up->cached_mode, &up->regs->rw.mode); - up->cached_mode |= SAB82532_MODE_RTS; - writeb(up->cached_mode, &up->regs->rw.mode); - - up->tec_timeout = SAB82532_MAX_TEC_TIMEOUT; - up->cec_timeout = SAB82532_MAX_CEC_TIMEOUT; - - return 0; -} - -static int __devinit sab_probe(struct platform_device *op, const struct of_device_id *match) -{ - static int inst; - struct uart_sunsab_port *up; - int err; - - up = &sunsab_ports[inst * 2]; - - err = sunsab_init_one(&up[0], op, - 0, - (inst * 2) + 0); - if (err) - goto out; - - err = sunsab_init_one(&up[1], op, - sizeof(union sab82532_async_regs), - (inst * 2) + 1); - if (err) - goto out1; - - sunserial_console_match(SUNSAB_CONSOLE(), op->dev.of_node, - &sunsab_reg, up[0].port.line, - false); - - sunserial_console_match(SUNSAB_CONSOLE(), op->dev.of_node, - &sunsab_reg, up[1].port.line, - false); - - err = uart_add_one_port(&sunsab_reg, &up[0].port); - if (err) - goto out2; - - err = uart_add_one_port(&sunsab_reg, &up[1].port); - if (err) - goto out3; - - dev_set_drvdata(&op->dev, &up[0]); - - inst++; - - return 0; - -out3: - uart_remove_one_port(&sunsab_reg, &up[0].port); -out2: - of_iounmap(&op->resource[0], - up[1].port.membase, - sizeof(union sab82532_async_regs)); -out1: - of_iounmap(&op->resource[0], - up[0].port.membase, - sizeof(union sab82532_async_regs)); -out: - return err; -} - -static int __devexit sab_remove(struct platform_device *op) -{ - struct uart_sunsab_port *up = dev_get_drvdata(&op->dev); - - uart_remove_one_port(&sunsab_reg, &up[1].port); - uart_remove_one_port(&sunsab_reg, &up[0].port); - of_iounmap(&op->resource[0], - up[1].port.membase, - sizeof(union sab82532_async_regs)); - of_iounmap(&op->resource[0], - up[0].port.membase, - sizeof(union sab82532_async_regs)); - - dev_set_drvdata(&op->dev, NULL); - - return 0; -} - -static const struct of_device_id sab_match[] = { - { - .name = "se", - }, - { - .name = "serial", - .compatible = "sab82532", - }, - {}, -}; -MODULE_DEVICE_TABLE(of, sab_match); - -static struct of_platform_driver sab_driver = { - .driver = { - .name = "sab", - .owner = THIS_MODULE, - .of_match_table = sab_match, - }, - .probe = sab_probe, - .remove = __devexit_p(sab_remove), -}; - -static int __init sunsab_init(void) -{ - struct device_node *dp; - int err; - int num_channels = 0; - - for_each_node_by_name(dp, "se") - num_channels += 2; - for_each_node_by_name(dp, "serial") { - if (of_device_is_compatible(dp, "sab82532")) - num_channels += 2; - } - - if (num_channels) { - sunsab_ports = kzalloc(sizeof(struct uart_sunsab_port) * - num_channels, GFP_KERNEL); - if (!sunsab_ports) - return -ENOMEM; - - err = sunserial_register_minors(&sunsab_reg, num_channels); - if (err) { - kfree(sunsab_ports); - sunsab_ports = NULL; - - return err; - } - } - - return of_register_platform_driver(&sab_driver); -} - -static void __exit sunsab_exit(void) -{ - of_unregister_platform_driver(&sab_driver); - if (sunsab_reg.nr) { - sunserial_unregister_minors(&sunsab_reg, sunsab_reg.nr); - } - - kfree(sunsab_ports); - sunsab_ports = NULL; -} - -module_init(sunsab_init); -module_exit(sunsab_exit); - -MODULE_AUTHOR("Eddie C. Dost and David S. Miller"); -MODULE_DESCRIPTION("Sun SAB82532 serial port driver"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/sunsab.h b/drivers/serial/sunsab.h deleted file mode 100644 index b78e1f7b8050..000000000000 --- a/drivers/serial/sunsab.h +++ /dev/null @@ -1,322 +0,0 @@ -/* sunsab.h: Register Definitions for the Siemens SAB82532 DUSCC - * - * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) - */ - -#ifndef _SUNSAB_H -#define _SUNSAB_H - -struct sab82532_async_rd_regs { - u8 rfifo[0x20]; /* Receive FIFO */ - u8 star; /* Status Register */ - u8 __pad1; - u8 mode; /* Mode Register */ - u8 timr; /* Timer Register */ - u8 xon; /* XON Character */ - u8 xoff; /* XOFF Character */ - u8 tcr; /* Termination Character Register */ - u8 dafo; /* Data Format */ - u8 rfc; /* RFIFO Control Register */ - u8 __pad2; - u8 rbcl; /* Receive Byte Count Low */ - u8 rbch; /* Receive Byte Count High */ - u8 ccr0; /* Channel Configuration Register 0 */ - u8 ccr1; /* Channel Configuration Register 1 */ - u8 ccr2; /* Channel Configuration Register 2 */ - u8 ccr3; /* Channel Configuration Register 3 */ - u8 __pad3[4]; - u8 vstr; /* Version Status Register */ - u8 __pad4[3]; - u8 gis; /* Global Interrupt Status */ - u8 ipc; /* Interrupt Port Configuration */ - u8 isr0; /* Interrupt Status 0 */ - u8 isr1; /* Interrupt Status 1 */ - u8 pvr; /* Port Value Register */ - u8 pis; /* Port Interrupt Status */ - u8 pcr; /* Port Configuration Register */ - u8 ccr4; /* Channel Configuration Register 4 */ -}; - -struct sab82532_async_wr_regs { - u8 xfifo[0x20]; /* Transmit FIFO */ - u8 cmdr; /* Command Register */ - u8 __pad1; - u8 mode; - u8 timr; - u8 xon; - u8 xoff; - u8 tcr; - u8 dafo; - u8 rfc; - u8 __pad2; - u8 xbcl; /* Transmit Byte Count Low */ - u8 xbch; /* Transmit Byte Count High */ - u8 ccr0; - u8 ccr1; - u8 ccr2; - u8 ccr3; - u8 tsax; /* Time-Slot Assignment Reg. Transmit */ - u8 tsar; /* Time-Slot Assignment Reg. Receive */ - u8 xccr; /* Transmit Channel Capacity Register */ - u8 rccr; /* Receive Channel Capacity Register */ - u8 bgr; /* Baud Rate Generator Register */ - u8 tic; /* Transmit Immediate Character */ - u8 mxn; /* Mask XON Character */ - u8 mxf; /* Mask XOFF Character */ - u8 iva; /* Interrupt Vector Address */ - u8 ipc; - u8 imr0; /* Interrupt Mask Register 0 */ - u8 imr1; /* Interrupt Mask Register 1 */ - u8 pvr; - u8 pim; /* Port Interrupt Mask */ - u8 pcr; - u8 ccr4; -}; - -struct sab82532_async_rw_regs { /* Read/Write registers */ - u8 __pad1[0x20]; - u8 __pad2; - u8 __pad3; - u8 mode; - u8 timr; - u8 xon; - u8 xoff; - u8 tcr; - u8 dafo; - u8 rfc; - u8 __pad4; - u8 __pad5; - u8 __pad6; - u8 ccr0; - u8 ccr1; - u8 ccr2; - u8 ccr3; - u8 __pad7; - u8 __pad8; - u8 __pad9; - u8 __pad10; - u8 __pad11; - u8 __pad12; - u8 __pad13; - u8 __pad14; - u8 __pad15; - u8 ipc; - u8 __pad16; - u8 __pad17; - u8 pvr; - u8 __pad18; - u8 pcr; - u8 ccr4; -}; - -union sab82532_async_regs { - __volatile__ struct sab82532_async_rd_regs r; - __volatile__ struct sab82532_async_wr_regs w; - __volatile__ struct sab82532_async_rw_regs rw; -}; - -union sab82532_irq_status { - unsigned short stat; - struct { - unsigned char isr0; - unsigned char isr1; - } sreg; -}; - -/* irqflags bits */ -#define SAB82532_ALLS 0x00000001 -#define SAB82532_XPR 0x00000002 -#define SAB82532_REGS_PENDING 0x00000004 - -/* RFIFO Status Byte */ -#define SAB82532_RSTAT_PE 0x80 -#define SAB82532_RSTAT_FE 0x40 -#define SAB82532_RSTAT_PARITY 0x01 - -/* Status Register (STAR) */ -#define SAB82532_STAR_XDOV 0x80 -#define SAB82532_STAR_XFW 0x40 -#define SAB82532_STAR_RFNE 0x20 -#define SAB82532_STAR_FCS 0x10 -#define SAB82532_STAR_TEC 0x08 -#define SAB82532_STAR_CEC 0x04 -#define SAB82532_STAR_CTS 0x02 - -/* Command Register (CMDR) */ -#define SAB82532_CMDR_RMC 0x80 -#define SAB82532_CMDR_RRES 0x40 -#define SAB82532_CMDR_RFRD 0x20 -#define SAB82532_CMDR_STI 0x10 -#define SAB82532_CMDR_XF 0x08 -#define SAB82532_CMDR_XRES 0x01 - -/* Mode Register (MODE) */ -#define SAB82532_MODE_FRTS 0x40 -#define SAB82532_MODE_FCTS 0x20 -#define SAB82532_MODE_FLON 0x10 -#define SAB82532_MODE_RAC 0x08 -#define SAB82532_MODE_RTS 0x04 -#define SAB82532_MODE_TRS 0x02 -#define SAB82532_MODE_TLP 0x01 - -/* Timer Register (TIMR) */ -#define SAB82532_TIMR_CNT_MASK 0xe0 -#define SAB82532_TIMR_VALUE_MASK 0x1f - -/* Data Format (DAFO) */ -#define SAB82532_DAFO_XBRK 0x40 -#define SAB82532_DAFO_STOP 0x20 -#define SAB82532_DAFO_PAR_SPACE 0x00 -#define SAB82532_DAFO_PAR_ODD 0x08 -#define SAB82532_DAFO_PAR_EVEN 0x10 -#define SAB82532_DAFO_PAR_MARK 0x18 -#define SAB82532_DAFO_PARE 0x04 -#define SAB82532_DAFO_CHL8 0x00 -#define SAB82532_DAFO_CHL7 0x01 -#define SAB82532_DAFO_CHL6 0x02 -#define SAB82532_DAFO_CHL5 0x03 - -/* RFIFO Control Register (RFC) */ -#define SAB82532_RFC_DPS 0x40 -#define SAB82532_RFC_DXS 0x20 -#define SAB82532_RFC_RFDF 0x10 -#define SAB82532_RFC_RFTH_1 0x00 -#define SAB82532_RFC_RFTH_4 0x04 -#define SAB82532_RFC_RFTH_16 0x08 -#define SAB82532_RFC_RFTH_32 0x0c -#define SAB82532_RFC_TCDE 0x01 - -/* Received Byte Count High (RBCH) */ -#define SAB82532_RBCH_DMA 0x80 -#define SAB82532_RBCH_CAS 0x20 - -/* Transmit Byte Count High (XBCH) */ -#define SAB82532_XBCH_DMA 0x80 -#define SAB82532_XBCH_CAS 0x20 -#define SAB82532_XBCH_XC 0x10 - -/* Channel Configuration Register 0 (CCR0) */ -#define SAB82532_CCR0_PU 0x80 -#define SAB82532_CCR0_MCE 0x40 -#define SAB82532_CCR0_SC_NRZ 0x00 -#define SAB82532_CCR0_SC_NRZI 0x08 -#define SAB82532_CCR0_SC_FM0 0x10 -#define SAB82532_CCR0_SC_FM1 0x14 -#define SAB82532_CCR0_SC_MANCH 0x18 -#define SAB82532_CCR0_SM_HDLC 0x00 -#define SAB82532_CCR0_SM_SDLC_LOOP 0x01 -#define SAB82532_CCR0_SM_BISYNC 0x02 -#define SAB82532_CCR0_SM_ASYNC 0x03 - -/* Channel Configuration Register 1 (CCR1) */ -#define SAB82532_CCR1_ODS 0x10 -#define SAB82532_CCR1_BCR 0x08 -#define SAB82532_CCR1_CM_MASK 0x07 - -/* Channel Configuration Register 2 (CCR2) */ -#define SAB82532_CCR2_SOC1 0x80 -#define SAB82532_CCR2_SOC0 0x40 -#define SAB82532_CCR2_BR9 0x80 -#define SAB82532_CCR2_BR8 0x40 -#define SAB82532_CCR2_BDF 0x20 -#define SAB82532_CCR2_SSEL 0x10 -#define SAB82532_CCR2_XCS0 0x20 -#define SAB82532_CCR2_RCS0 0x10 -#define SAB82532_CCR2_TOE 0x08 -#define SAB82532_CCR2_RWX 0x04 -#define SAB82532_CCR2_DIV 0x01 - -/* Channel Configuration Register 3 (CCR3) */ -#define SAB82532_CCR3_PSD 0x01 - -/* Time Slot Assignment Register Transmit (TSAX) */ -#define SAB82532_TSAX_TSNX_MASK 0xfc -#define SAB82532_TSAX_XCS2 0x02 /* see also CCR2 */ -#define SAB82532_TSAX_XCS1 0x01 - -/* Time Slot Assignment Register Receive (TSAR) */ -#define SAB82532_TSAR_TSNR_MASK 0xfc -#define SAB82532_TSAR_RCS2 0x02 /* see also CCR2 */ -#define SAB82532_TSAR_RCS1 0x01 - -/* Version Status Register (VSTR) */ -#define SAB82532_VSTR_CD 0x80 -#define SAB82532_VSTR_DPLA 0x40 -#define SAB82532_VSTR_VN_MASK 0x0f -#define SAB82532_VSTR_VN_1 0x00 -#define SAB82532_VSTR_VN_2 0x01 -#define SAB82532_VSTR_VN_3_2 0x02 - -/* Global Interrupt Status Register (GIS) */ -#define SAB82532_GIS_PI 0x80 -#define SAB82532_GIS_ISA1 0x08 -#define SAB82532_GIS_ISA0 0x04 -#define SAB82532_GIS_ISB1 0x02 -#define SAB82532_GIS_ISB0 0x01 - -/* Interrupt Vector Address (IVA) */ -#define SAB82532_IVA_MASK 0xf1 - -/* Interrupt Port Configuration (IPC) */ -#define SAB82532_IPC_VIS 0x80 -#define SAB82532_IPC_SLA1 0x10 -#define SAB82532_IPC_SLA0 0x08 -#define SAB82532_IPC_CASM 0x04 -#define SAB82532_IPC_IC_OPEN_DRAIN 0x00 -#define SAB82532_IPC_IC_ACT_LOW 0x01 -#define SAB82532_IPC_IC_ACT_HIGH 0x03 - -/* Interrupt Status Register 0 (ISR0) */ -#define SAB82532_ISR0_TCD 0x80 -#define SAB82532_ISR0_TIME 0x40 -#define SAB82532_ISR0_PERR 0x20 -#define SAB82532_ISR0_FERR 0x10 -#define SAB82532_ISR0_PLLA 0x08 -#define SAB82532_ISR0_CDSC 0x04 -#define SAB82532_ISR0_RFO 0x02 -#define SAB82532_ISR0_RPF 0x01 - -/* Interrupt Status Register 1 (ISR1) */ -#define SAB82532_ISR1_BRK 0x80 -#define SAB82532_ISR1_BRKT 0x40 -#define SAB82532_ISR1_ALLS 0x20 -#define SAB82532_ISR1_XOFF 0x10 -#define SAB82532_ISR1_TIN 0x08 -#define SAB82532_ISR1_CSC 0x04 -#define SAB82532_ISR1_XON 0x02 -#define SAB82532_ISR1_XPR 0x01 - -/* Interrupt Mask Register 0 (IMR0) */ -#define SAB82532_IMR0_TCD 0x80 -#define SAB82532_IMR0_TIME 0x40 -#define SAB82532_IMR0_PERR 0x20 -#define SAB82532_IMR0_FERR 0x10 -#define SAB82532_IMR0_PLLA 0x08 -#define SAB82532_IMR0_CDSC 0x04 -#define SAB82532_IMR0_RFO 0x02 -#define SAB82532_IMR0_RPF 0x01 - -/* Interrupt Mask Register 1 (IMR1) */ -#define SAB82532_IMR1_BRK 0x80 -#define SAB82532_IMR1_BRKT 0x40 -#define SAB82532_IMR1_ALLS 0x20 -#define SAB82532_IMR1_XOFF 0x10 -#define SAB82532_IMR1_TIN 0x08 -#define SAB82532_IMR1_CSC 0x04 -#define SAB82532_IMR1_XON 0x02 -#define SAB82532_IMR1_XPR 0x01 - -/* Port Interrupt Status Register (PIS) */ -#define SAB82532_PIS_SYNC_B 0x08 -#define SAB82532_PIS_DTR_B 0x04 -#define SAB82532_PIS_DTR_A 0x02 -#define SAB82532_PIS_SYNC_A 0x01 - -/* Channel Configuration Register 4 (CCR4) */ -#define SAB82532_CCR4_MCK4 0x80 -#define SAB82532_CCR4_EBRG 0x40 -#define SAB82532_CCR4_TST1 0x20 -#define SAB82532_CCR4_ICD 0x10 - - -#endif /* !(_SUNSAB_H) */ diff --git a/drivers/serial/sunsu.c b/drivers/serial/sunsu.c deleted file mode 100644 index 551ebfe3ccbb..000000000000 --- a/drivers/serial/sunsu.c +++ /dev/null @@ -1,1608 +0,0 @@ -/* - * su.c: Small serial driver for keyboard/mouse interface on sparc32/PCI - * - * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) - * Copyright (C) 1998-1999 Pete Zaitcev (zaitcev@yahoo.com) - * - * This is mainly a variation of 8250.c, credits go to authors mentioned - * therein. In fact this driver should be merged into the generic 8250.c - * infrastructure perhaps using a 8250_sparc.c module. - * - * Fixed to use tty_get_baud_rate(). - * Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12 - * - * Converted to new 2.5.x UART layer. - * David S. Miller (davem@davemloft.net), 2002-Jul-29 - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/spinlock.h> -#include <linux/errno.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/major.h> -#include <linux/string.h> -#include <linux/ptrace.h> -#include <linux/ioport.h> -#include <linux/circ_buf.h> -#include <linux/serial.h> -#include <linux/sysrq.h> -#include <linux/console.h> -#include <linux/slab.h> -#ifdef CONFIG_SERIO -#include <linux/serio.h> -#endif -#include <linux/serial_reg.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/of_device.h> - -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/prom.h> - -#if defined(CONFIG_SERIAL_SUNSU_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/serial_core.h> - -#include "suncore.h" - -/* We are on a NS PC87303 clocked with 24.0 MHz, which results - * in a UART clock of 1.8462 MHz. - */ -#define SU_BASE_BAUD (1846200 / 16) - -enum su_type { SU_PORT_NONE, SU_PORT_MS, SU_PORT_KBD, SU_PORT_PORT }; -static char *su_typev[] = { "su(???)", "su(mouse)", "su(kbd)", "su(serial)" }; - -/* - * Here we define the default xmit fifo size used for each type of UART. - */ -static const struct serial_uart_config uart_config[PORT_MAX_8250+1] = { - { "unknown", 1, 0 }, - { "8250", 1, 0 }, - { "16450", 1, 0 }, - { "16550", 1, 0 }, - { "16550A", 16, UART_CLEAR_FIFO | UART_USE_FIFO }, - { "Cirrus", 1, 0 }, - { "ST16650", 1, UART_CLEAR_FIFO | UART_STARTECH }, - { "ST16650V2", 32, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH }, - { "TI16750", 64, UART_CLEAR_FIFO | UART_USE_FIFO }, - { "Startech", 1, 0 }, - { "16C950/954", 128, UART_CLEAR_FIFO | UART_USE_FIFO }, - { "ST16654", 64, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH }, - { "XR16850", 128, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH }, - { "RSA", 2048, UART_CLEAR_FIFO | UART_USE_FIFO } -}; - -struct uart_sunsu_port { - struct uart_port port; - unsigned char acr; - unsigned char ier; - unsigned short rev; - unsigned char lcr; - unsigned int lsr_break_flag; - unsigned int cflag; - - /* Probing information. */ - enum su_type su_type; - unsigned int type_probed; /* XXX Stupid */ - unsigned long reg_size; - -#ifdef CONFIG_SERIO - struct serio serio; - int serio_open; -#endif -}; - -static unsigned int serial_in(struct uart_sunsu_port *up, int offset) -{ - offset <<= up->port.regshift; - - switch (up->port.iotype) { - case UPIO_HUB6: - outb(up->port.hub6 - 1 + offset, up->port.iobase); - return inb(up->port.iobase + 1); - - case UPIO_MEM: - return readb(up->port.membase + offset); - - default: - return inb(up->port.iobase + offset); - } -} - -static void serial_out(struct uart_sunsu_port *up, int offset, int value) -{ -#ifndef CONFIG_SPARC64 - /* - * MrCoffee has weird schematics: IRQ4 & P10(?) pins of SuperIO are - * connected with a gate then go to SlavIO. When IRQ4 goes tristated - * gate outputs a logical one. Since we use level triggered interrupts - * we have lockup and watchdog reset. We cannot mask IRQ because - * keyboard shares IRQ with us (Word has it as Bob Smelik's design). - * This problem is similar to what Alpha people suffer, see serial.c. - */ - if (offset == UART_MCR) - value |= UART_MCR_OUT2; -#endif - offset <<= up->port.regshift; - - switch (up->port.iotype) { - case UPIO_HUB6: - outb(up->port.hub6 - 1 + offset, up->port.iobase); - outb(value, up->port.iobase + 1); - break; - - case UPIO_MEM: - writeb(value, up->port.membase + offset); - break; - - default: - outb(value, up->port.iobase + offset); - } -} - -/* - * We used to support using pause I/O for certain machines. We - * haven't supported this for a while, but just in case it's badly - * needed for certain old 386 machines, I've left these #define's - * in.... - */ -#define serial_inp(up, offset) serial_in(up, offset) -#define serial_outp(up, offset, value) serial_out(up, offset, value) - - -/* - * For the 16C950 - */ -static void serial_icr_write(struct uart_sunsu_port *up, int offset, int value) -{ - serial_out(up, UART_SCR, offset); - serial_out(up, UART_ICR, value); -} - -#if 0 /* Unused currently */ -static unsigned int serial_icr_read(struct uart_sunsu_port *up, int offset) -{ - unsigned int value; - - serial_icr_write(up, UART_ACR, up->acr | UART_ACR_ICRRD); - serial_out(up, UART_SCR, offset); - value = serial_in(up, UART_ICR); - serial_icr_write(up, UART_ACR, up->acr); - - return value; -} -#endif - -#ifdef CONFIG_SERIAL_8250_RSA -/* - * Attempts to turn on the RSA FIFO. Returns zero on failure. - * We set the port uart clock rate if we succeed. - */ -static int __enable_rsa(struct uart_sunsu_port *up) -{ - unsigned char mode; - int result; - - mode = serial_inp(up, UART_RSA_MSR); - result = mode & UART_RSA_MSR_FIFO; - - if (!result) { - serial_outp(up, UART_RSA_MSR, mode | UART_RSA_MSR_FIFO); - mode = serial_inp(up, UART_RSA_MSR); - result = mode & UART_RSA_MSR_FIFO; - } - - if (result) - up->port.uartclk = SERIAL_RSA_BAUD_BASE * 16; - - return result; -} - -static void enable_rsa(struct uart_sunsu_port *up) -{ - if (up->port.type == PORT_RSA) { - if (up->port.uartclk != SERIAL_RSA_BAUD_BASE * 16) { - spin_lock_irq(&up->port.lock); - __enable_rsa(up); - spin_unlock_irq(&up->port.lock); - } - if (up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) - serial_outp(up, UART_RSA_FRR, 0); - } -} - -/* - * Attempts to turn off the RSA FIFO. Returns zero on failure. - * It is unknown why interrupts were disabled in here. However, - * the caller is expected to preserve this behaviour by grabbing - * the spinlock before calling this function. - */ -static void disable_rsa(struct uart_sunsu_port *up) -{ - unsigned char mode; - int result; - - if (up->port.type == PORT_RSA && - up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) { - spin_lock_irq(&up->port.lock); - - mode = serial_inp(up, UART_RSA_MSR); - result = !(mode & UART_RSA_MSR_FIFO); - - if (!result) { - serial_outp(up, UART_RSA_MSR, mode & ~UART_RSA_MSR_FIFO); - mode = serial_inp(up, UART_RSA_MSR); - result = !(mode & UART_RSA_MSR_FIFO); - } - - if (result) - up->port.uartclk = SERIAL_RSA_BAUD_BASE_LO * 16; - spin_unlock_irq(&up->port.lock); - } -} -#endif /* CONFIG_SERIAL_8250_RSA */ - -static inline void __stop_tx(struct uart_sunsu_port *p) -{ - if (p->ier & UART_IER_THRI) { - p->ier &= ~UART_IER_THRI; - serial_out(p, UART_IER, p->ier); - } -} - -static void sunsu_stop_tx(struct uart_port *port) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - - __stop_tx(up); - - /* - * We really want to stop the transmitter from sending. - */ - if (up->port.type == PORT_16C950) { - up->acr |= UART_ACR_TXDIS; - serial_icr_write(up, UART_ACR, up->acr); - } -} - -static void sunsu_start_tx(struct uart_port *port) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - - if (!(up->ier & UART_IER_THRI)) { - up->ier |= UART_IER_THRI; - serial_out(up, UART_IER, up->ier); - } - - /* - * Re-enable the transmitter if we disabled it. - */ - if (up->port.type == PORT_16C950 && up->acr & UART_ACR_TXDIS) { - up->acr &= ~UART_ACR_TXDIS; - serial_icr_write(up, UART_ACR, up->acr); - } -} - -static void sunsu_stop_rx(struct uart_port *port) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - - up->ier &= ~UART_IER_RLSI; - up->port.read_status_mask &= ~UART_LSR_DR; - serial_out(up, UART_IER, up->ier); -} - -static void sunsu_enable_ms(struct uart_port *port) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - unsigned long flags; - - spin_lock_irqsave(&up->port.lock, flags); - up->ier |= UART_IER_MSI; - serial_out(up, UART_IER, up->ier); - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static struct tty_struct * -receive_chars(struct uart_sunsu_port *up, unsigned char *status) -{ - struct tty_struct *tty = up->port.state->port.tty; - unsigned char ch, flag; - int max_count = 256; - int saw_console_brk = 0; - - do { - ch = serial_inp(up, UART_RX); - flag = TTY_NORMAL; - up->port.icount.rx++; - - if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE | - UART_LSR_FE | UART_LSR_OE))) { - /* - * For statistics only - */ - if (*status & UART_LSR_BI) { - *status &= ~(UART_LSR_FE | UART_LSR_PE); - up->port.icount.brk++; - if (up->port.cons != NULL && - up->port.line == up->port.cons->index) - saw_console_brk = 1; - /* - * We do the SysRQ and SAK checking - * here because otherwise the break - * may get masked by ignore_status_mask - * or read_status_mask. - */ - if (uart_handle_break(&up->port)) - goto ignore_char; - } else if (*status & UART_LSR_PE) - up->port.icount.parity++; - else if (*status & UART_LSR_FE) - up->port.icount.frame++; - if (*status & UART_LSR_OE) - up->port.icount.overrun++; - - /* - * Mask off conditions which should be ingored. - */ - *status &= up->port.read_status_mask; - - if (up->port.cons != NULL && - up->port.line == up->port.cons->index) { - /* Recover the break flag from console xmit */ - *status |= up->lsr_break_flag; - up->lsr_break_flag = 0; - } - - if (*status & UART_LSR_BI) { - flag = TTY_BREAK; - } else if (*status & UART_LSR_PE) - flag = TTY_PARITY; - else if (*status & UART_LSR_FE) - flag = TTY_FRAME; - } - if (uart_handle_sysrq_char(&up->port, ch)) - goto ignore_char; - if ((*status & up->port.ignore_status_mask) == 0) - tty_insert_flip_char(tty, ch, flag); - if (*status & UART_LSR_OE) - /* - * Overrun is special, since it's reported - * immediately, and doesn't affect the current - * character. - */ - tty_insert_flip_char(tty, 0, TTY_OVERRUN); - ignore_char: - *status = serial_inp(up, UART_LSR); - } while ((*status & UART_LSR_DR) && (max_count-- > 0)); - - if (saw_console_brk) - sun_do_break(); - - return tty; -} - -static void transmit_chars(struct uart_sunsu_port *up) -{ - struct circ_buf *xmit = &up->port.state->xmit; - int count; - - if (up->port.x_char) { - serial_outp(up, UART_TX, up->port.x_char); - up->port.icount.tx++; - up->port.x_char = 0; - return; - } - if (uart_tx_stopped(&up->port)) { - sunsu_stop_tx(&up->port); - return; - } - if (uart_circ_empty(xmit)) { - __stop_tx(up); - return; - } - - count = up->port.fifosize; - do { - serial_out(up, UART_TX, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - up->port.icount.tx++; - if (uart_circ_empty(xmit)) - break; - } while (--count > 0); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&up->port); - - if (uart_circ_empty(xmit)) - __stop_tx(up); -} - -static void check_modem_status(struct uart_sunsu_port *up) -{ - int status; - - status = serial_in(up, UART_MSR); - - if ((status & UART_MSR_ANY_DELTA) == 0) - return; - - if (status & UART_MSR_TERI) - up->port.icount.rng++; - if (status & UART_MSR_DDSR) - up->port.icount.dsr++; - if (status & UART_MSR_DDCD) - uart_handle_dcd_change(&up->port, status & UART_MSR_DCD); - if (status & UART_MSR_DCTS) - uart_handle_cts_change(&up->port, status & UART_MSR_CTS); - - wake_up_interruptible(&up->port.state->port.delta_msr_wait); -} - -static irqreturn_t sunsu_serial_interrupt(int irq, void *dev_id) -{ - struct uart_sunsu_port *up = dev_id; - unsigned long flags; - unsigned char status; - - spin_lock_irqsave(&up->port.lock, flags); - - do { - struct tty_struct *tty; - - status = serial_inp(up, UART_LSR); - tty = NULL; - if (status & UART_LSR_DR) - tty = receive_chars(up, &status); - check_modem_status(up); - if (status & UART_LSR_THRE) - transmit_chars(up); - - spin_unlock_irqrestore(&up->port.lock, flags); - - if (tty) - tty_flip_buffer_push(tty); - - spin_lock_irqsave(&up->port.lock, flags); - - } while (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT)); - - spin_unlock_irqrestore(&up->port.lock, flags); - - return IRQ_HANDLED; -} - -/* Separate interrupt handling path for keyboard/mouse ports. */ - -static void -sunsu_change_speed(struct uart_port *port, unsigned int cflag, - unsigned int iflag, unsigned int quot); - -static void sunsu_change_mouse_baud(struct uart_sunsu_port *up) -{ - unsigned int cur_cflag = up->cflag; - int quot, new_baud; - - up->cflag &= ~CBAUD; - up->cflag |= suncore_mouse_baud_cflag_next(cur_cflag, &new_baud); - - quot = up->port.uartclk / (16 * new_baud); - - sunsu_change_speed(&up->port, up->cflag, 0, quot); -} - -static void receive_kbd_ms_chars(struct uart_sunsu_port *up, int is_break) -{ - do { - unsigned char ch = serial_inp(up, UART_RX); - - /* Stop-A is handled by drivers/char/keyboard.c now. */ - if (up->su_type == SU_PORT_KBD) { -#ifdef CONFIG_SERIO - serio_interrupt(&up->serio, ch, 0); -#endif - } else if (up->su_type == SU_PORT_MS) { - int ret = suncore_mouse_baud_detection(ch, is_break); - - switch (ret) { - case 2: - sunsu_change_mouse_baud(up); - /* fallthru */ - case 1: - break; - - case 0: -#ifdef CONFIG_SERIO - serio_interrupt(&up->serio, ch, 0); -#endif - break; - }; - } - } while (serial_in(up, UART_LSR) & UART_LSR_DR); -} - -static irqreturn_t sunsu_kbd_ms_interrupt(int irq, void *dev_id) -{ - struct uart_sunsu_port *up = dev_id; - - if (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT)) { - unsigned char status = serial_inp(up, UART_LSR); - - if ((status & UART_LSR_DR) || (status & UART_LSR_BI)) - receive_kbd_ms_chars(up, (status & UART_LSR_BI) != 0); - } - - return IRQ_HANDLED; -} - -static unsigned int sunsu_tx_empty(struct uart_port *port) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - unsigned long flags; - unsigned int ret; - - spin_lock_irqsave(&up->port.lock, flags); - ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0; - spin_unlock_irqrestore(&up->port.lock, flags); - - return ret; -} - -static unsigned int sunsu_get_mctrl(struct uart_port *port) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - unsigned char status; - unsigned int ret; - - status = serial_in(up, UART_MSR); - - ret = 0; - if (status & UART_MSR_DCD) - ret |= TIOCM_CAR; - if (status & UART_MSR_RI) - ret |= TIOCM_RNG; - if (status & UART_MSR_DSR) - ret |= TIOCM_DSR; - if (status & UART_MSR_CTS) - ret |= TIOCM_CTS; - return ret; -} - -static void sunsu_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - unsigned char mcr = 0; - - if (mctrl & TIOCM_RTS) - mcr |= UART_MCR_RTS; - if (mctrl & TIOCM_DTR) - mcr |= UART_MCR_DTR; - if (mctrl & TIOCM_OUT1) - mcr |= UART_MCR_OUT1; - if (mctrl & TIOCM_OUT2) - mcr |= UART_MCR_OUT2; - if (mctrl & TIOCM_LOOP) - mcr |= UART_MCR_LOOP; - - serial_out(up, UART_MCR, mcr); -} - -static void sunsu_break_ctl(struct uart_port *port, int break_state) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - unsigned long flags; - - spin_lock_irqsave(&up->port.lock, flags); - if (break_state == -1) - up->lcr |= UART_LCR_SBC; - else - up->lcr &= ~UART_LCR_SBC; - serial_out(up, UART_LCR, up->lcr); - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static int sunsu_startup(struct uart_port *port) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - unsigned long flags; - int retval; - - if (up->port.type == PORT_16C950) { - /* Wake up and initialize UART */ - up->acr = 0; - serial_outp(up, UART_LCR, 0xBF); - serial_outp(up, UART_EFR, UART_EFR_ECB); - serial_outp(up, UART_IER, 0); - serial_outp(up, UART_LCR, 0); - serial_icr_write(up, UART_CSR, 0); /* Reset the UART */ - serial_outp(up, UART_LCR, 0xBF); - serial_outp(up, UART_EFR, UART_EFR_ECB); - serial_outp(up, UART_LCR, 0); - } - -#ifdef CONFIG_SERIAL_8250_RSA - /* - * If this is an RSA port, see if we can kick it up to the - * higher speed clock. - */ - enable_rsa(up); -#endif - - /* - * Clear the FIFO buffers and disable them. - * (they will be reenabled in set_termios()) - */ - if (uart_config[up->port.type].flags & UART_CLEAR_FIFO) { - serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); - serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO | - UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); - serial_outp(up, UART_FCR, 0); - } - - /* - * Clear the interrupt registers. - */ - (void) serial_inp(up, UART_LSR); - (void) serial_inp(up, UART_RX); - (void) serial_inp(up, UART_IIR); - (void) serial_inp(up, UART_MSR); - - /* - * At this point, there's no way the LSR could still be 0xff; - * if it is, then bail out, because there's likely no UART - * here. - */ - if (!(up->port.flags & UPF_BUGGY_UART) && - (serial_inp(up, UART_LSR) == 0xff)) { - printk("ttyS%d: LSR safety check engaged!\n", up->port.line); - return -ENODEV; - } - - if (up->su_type != SU_PORT_PORT) { - retval = request_irq(up->port.irq, sunsu_kbd_ms_interrupt, - IRQF_SHARED, su_typev[up->su_type], up); - } else { - retval = request_irq(up->port.irq, sunsu_serial_interrupt, - IRQF_SHARED, su_typev[up->su_type], up); - } - if (retval) { - printk("su: Cannot register IRQ %d\n", up->port.irq); - return retval; - } - - /* - * Now, initialize the UART - */ - serial_outp(up, UART_LCR, UART_LCR_WLEN8); - - spin_lock_irqsave(&up->port.lock, flags); - - up->port.mctrl |= TIOCM_OUT2; - - sunsu_set_mctrl(&up->port, up->port.mctrl); - spin_unlock_irqrestore(&up->port.lock, flags); - - /* - * Finally, enable interrupts. Note: Modem status interrupts - * are set via set_termios(), which will be occurring imminently - * anyway, so we don't enable them here. - */ - up->ier = UART_IER_RLSI | UART_IER_RDI; - serial_outp(up, UART_IER, up->ier); - - if (up->port.flags & UPF_FOURPORT) { - unsigned int icp; - /* - * Enable interrupts on the AST Fourport board - */ - icp = (up->port.iobase & 0xfe0) | 0x01f; - outb_p(0x80, icp); - (void) inb_p(icp); - } - - /* - * And clear the interrupt registers again for luck. - */ - (void) serial_inp(up, UART_LSR); - (void) serial_inp(up, UART_RX); - (void) serial_inp(up, UART_IIR); - (void) serial_inp(up, UART_MSR); - - return 0; -} - -static void sunsu_shutdown(struct uart_port *port) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - unsigned long flags; - - /* - * Disable interrupts from this port - */ - up->ier = 0; - serial_outp(up, UART_IER, 0); - - spin_lock_irqsave(&up->port.lock, flags); - if (up->port.flags & UPF_FOURPORT) { - /* reset interrupts on the AST Fourport board */ - inb((up->port.iobase & 0xfe0) | 0x1f); - up->port.mctrl |= TIOCM_OUT1; - } else - up->port.mctrl &= ~TIOCM_OUT2; - - sunsu_set_mctrl(&up->port, up->port.mctrl); - spin_unlock_irqrestore(&up->port.lock, flags); - - /* - * Disable break condition and FIFOs - */ - serial_out(up, UART_LCR, serial_inp(up, UART_LCR) & ~UART_LCR_SBC); - serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO | - UART_FCR_CLEAR_RCVR | - UART_FCR_CLEAR_XMIT); - serial_outp(up, UART_FCR, 0); - -#ifdef CONFIG_SERIAL_8250_RSA - /* - * Reset the RSA board back to 115kbps compat mode. - */ - disable_rsa(up); -#endif - - /* - * Read data port to reset things. - */ - (void) serial_in(up, UART_RX); - - free_irq(up->port.irq, up); -} - -static void -sunsu_change_speed(struct uart_port *port, unsigned int cflag, - unsigned int iflag, unsigned int quot) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - unsigned char cval, fcr = 0; - unsigned long flags; - - switch (cflag & CSIZE) { - case CS5: - cval = 0x00; - break; - case CS6: - cval = 0x01; - break; - case CS7: - cval = 0x02; - break; - default: - case CS8: - cval = 0x03; - break; - } - - if (cflag & CSTOPB) - cval |= 0x04; - if (cflag & PARENB) - cval |= UART_LCR_PARITY; - if (!(cflag & PARODD)) - cval |= UART_LCR_EPAR; -#ifdef CMSPAR - if (cflag & CMSPAR) - cval |= UART_LCR_SPAR; -#endif - - /* - * Work around a bug in the Oxford Semiconductor 952 rev B - * chip which causes it to seriously miscalculate baud rates - * when DLL is 0. - */ - if ((quot & 0xff) == 0 && up->port.type == PORT_16C950 && - up->rev == 0x5201) - quot ++; - - if (uart_config[up->port.type].flags & UART_USE_FIFO) { - if ((up->port.uartclk / quot) < (2400 * 16)) - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1; -#ifdef CONFIG_SERIAL_8250_RSA - else if (up->port.type == PORT_RSA) - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_14; -#endif - else - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8; - } - if (up->port.type == PORT_16750) - fcr |= UART_FCR7_64BYTE; - - /* - * Ok, we're now changing the port state. Do it with - * interrupts disabled. - */ - spin_lock_irqsave(&up->port.lock, flags); - - /* - * Update the per-port timeout. - */ - uart_update_timeout(port, cflag, (port->uartclk / (16 * quot))); - - up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; - if (iflag & INPCK) - up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; - if (iflag & (BRKINT | PARMRK)) - up->port.read_status_mask |= UART_LSR_BI; - - /* - * Characteres to ignore - */ - up->port.ignore_status_mask = 0; - if (iflag & IGNPAR) - up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; - if (iflag & IGNBRK) { - up->port.ignore_status_mask |= UART_LSR_BI; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too (for real raw support). - */ - if (iflag & IGNPAR) - up->port.ignore_status_mask |= UART_LSR_OE; - } - - /* - * ignore all characters if CREAD is not set - */ - if ((cflag & CREAD) == 0) - up->port.ignore_status_mask |= UART_LSR_DR; - - /* - * CTS flow control flag and modem status interrupts - */ - up->ier &= ~UART_IER_MSI; - if (UART_ENABLE_MS(&up->port, cflag)) - up->ier |= UART_IER_MSI; - - serial_out(up, UART_IER, up->ier); - - if (uart_config[up->port.type].flags & UART_STARTECH) { - serial_outp(up, UART_LCR, 0xBF); - serial_outp(up, UART_EFR, cflag & CRTSCTS ? UART_EFR_CTS :0); - } - serial_outp(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */ - serial_outp(up, UART_DLL, quot & 0xff); /* LS of divisor */ - serial_outp(up, UART_DLM, quot >> 8); /* MS of divisor */ - if (up->port.type == PORT_16750) - serial_outp(up, UART_FCR, fcr); /* set fcr */ - serial_outp(up, UART_LCR, cval); /* reset DLAB */ - up->lcr = cval; /* Save LCR */ - if (up->port.type != PORT_16750) { - if (fcr & UART_FCR_ENABLE_FIFO) { - /* emulated UARTs (Lucent Venus 167x) need two steps */ - serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); - } - serial_outp(up, UART_FCR, fcr); /* set fcr */ - } - - up->cflag = cflag; - - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static void -sunsu_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - unsigned int baud, quot; - - /* - * Ask the core to calculate the divisor for us. - */ - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); - quot = uart_get_divisor(port, baud); - - sunsu_change_speed(port, termios->c_cflag, termios->c_iflag, quot); -} - -static void sunsu_release_port(struct uart_port *port) -{ -} - -static int sunsu_request_port(struct uart_port *port) -{ - return 0; -} - -static void sunsu_config_port(struct uart_port *port, int flags) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; - - if (flags & UART_CONFIG_TYPE) { - /* - * We are supposed to call autoconfig here, but this requires - * splitting all the OBP probing crap from the UART probing. - * We'll do it when we kill sunsu.c altogether. - */ - port->type = up->type_probed; /* XXX */ - } -} - -static int -sunsu_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - return -EINVAL; -} - -static const char * -sunsu_type(struct uart_port *port) -{ - int type = port->type; - - if (type >= ARRAY_SIZE(uart_config)) - type = 0; - return uart_config[type].name; -} - -static struct uart_ops sunsu_pops = { - .tx_empty = sunsu_tx_empty, - .set_mctrl = sunsu_set_mctrl, - .get_mctrl = sunsu_get_mctrl, - .stop_tx = sunsu_stop_tx, - .start_tx = sunsu_start_tx, - .stop_rx = sunsu_stop_rx, - .enable_ms = sunsu_enable_ms, - .break_ctl = sunsu_break_ctl, - .startup = sunsu_startup, - .shutdown = sunsu_shutdown, - .set_termios = sunsu_set_termios, - .type = sunsu_type, - .release_port = sunsu_release_port, - .request_port = sunsu_request_port, - .config_port = sunsu_config_port, - .verify_port = sunsu_verify_port, -}; - -#define UART_NR 4 - -static struct uart_sunsu_port sunsu_ports[UART_NR]; - -#ifdef CONFIG_SERIO - -static DEFINE_SPINLOCK(sunsu_serio_lock); - -static int sunsu_serio_write(struct serio *serio, unsigned char ch) -{ - struct uart_sunsu_port *up = serio->port_data; - unsigned long flags; - int lsr; - - spin_lock_irqsave(&sunsu_serio_lock, flags); - - do { - lsr = serial_in(up, UART_LSR); - } while (!(lsr & UART_LSR_THRE)); - - /* Send the character out. */ - serial_out(up, UART_TX, ch); - - spin_unlock_irqrestore(&sunsu_serio_lock, flags); - - return 0; -} - -static int sunsu_serio_open(struct serio *serio) -{ - struct uart_sunsu_port *up = serio->port_data; - unsigned long flags; - int ret; - - spin_lock_irqsave(&sunsu_serio_lock, flags); - if (!up->serio_open) { - up->serio_open = 1; - ret = 0; - } else - ret = -EBUSY; - spin_unlock_irqrestore(&sunsu_serio_lock, flags); - - return ret; -} - -static void sunsu_serio_close(struct serio *serio) -{ - struct uart_sunsu_port *up = serio->port_data; - unsigned long flags; - - spin_lock_irqsave(&sunsu_serio_lock, flags); - up->serio_open = 0; - spin_unlock_irqrestore(&sunsu_serio_lock, flags); -} - -#endif /* CONFIG_SERIO */ - -static void sunsu_autoconfig(struct uart_sunsu_port *up) -{ - unsigned char status1, status2, scratch, scratch2, scratch3; - unsigned char save_lcr, save_mcr; - unsigned long flags; - - if (up->su_type == SU_PORT_NONE) - return; - - up->type_probed = PORT_UNKNOWN; - up->port.iotype = UPIO_MEM; - - spin_lock_irqsave(&up->port.lock, flags); - - if (!(up->port.flags & UPF_BUGGY_UART)) { - /* - * Do a simple existence test first; if we fail this, there's - * no point trying anything else. - * - * 0x80 is used as a nonsense port to prevent against false - * positives due to ISA bus float. The assumption is that - * 0x80 is a non-existent port; which should be safe since - * include/asm/io.h also makes this assumption. - */ - scratch = serial_inp(up, UART_IER); - serial_outp(up, UART_IER, 0); -#ifdef __i386__ - outb(0xff, 0x080); -#endif - scratch2 = serial_inp(up, UART_IER); - serial_outp(up, UART_IER, 0x0f); -#ifdef __i386__ - outb(0, 0x080); -#endif - scratch3 = serial_inp(up, UART_IER); - serial_outp(up, UART_IER, scratch); - if (scratch2 != 0 || scratch3 != 0x0F) - goto out; /* We failed; there's nothing here */ - } - - save_mcr = serial_in(up, UART_MCR); - save_lcr = serial_in(up, UART_LCR); - - /* - * Check to see if a UART is really there. Certain broken - * internal modems based on the Rockwell chipset fail this - * test, because they apparently don't implement the loopback - * test mode. So this test is skipped on the COM 1 through - * COM 4 ports. This *should* be safe, since no board - * manufacturer would be stupid enough to design a board - * that conflicts with COM 1-4 --- we hope! - */ - if (!(up->port.flags & UPF_SKIP_TEST)) { - serial_outp(up, UART_MCR, UART_MCR_LOOP | 0x0A); - status1 = serial_inp(up, UART_MSR) & 0xF0; - serial_outp(up, UART_MCR, save_mcr); - if (status1 != 0x90) - goto out; /* We failed loopback test */ - } - serial_outp(up, UART_LCR, 0xBF); /* set up for StarTech test */ - serial_outp(up, UART_EFR, 0); /* EFR is the same as FCR */ - serial_outp(up, UART_LCR, 0); - serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); - scratch = serial_in(up, UART_IIR) >> 6; - switch (scratch) { - case 0: - up->port.type = PORT_16450; - break; - case 1: - up->port.type = PORT_UNKNOWN; - break; - case 2: - up->port.type = PORT_16550; - break; - case 3: - up->port.type = PORT_16550A; - break; - } - if (up->port.type == PORT_16550A) { - /* Check for Startech UART's */ - serial_outp(up, UART_LCR, UART_LCR_DLAB); - if (serial_in(up, UART_EFR) == 0) { - up->port.type = PORT_16650; - } else { - serial_outp(up, UART_LCR, 0xBF); - if (serial_in(up, UART_EFR) == 0) - up->port.type = PORT_16650V2; - } - } - if (up->port.type == PORT_16550A) { - /* Check for TI 16750 */ - serial_outp(up, UART_LCR, save_lcr | UART_LCR_DLAB); - serial_outp(up, UART_FCR, - UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); - scratch = serial_in(up, UART_IIR) >> 5; - if (scratch == 7) { - /* - * If this is a 16750, and not a cheap UART - * clone, then it should only go into 64 byte - * mode if the UART_FCR7_64BYTE bit was set - * while UART_LCR_DLAB was latched. - */ - serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); - serial_outp(up, UART_LCR, 0); - serial_outp(up, UART_FCR, - UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); - scratch = serial_in(up, UART_IIR) >> 5; - if (scratch == 6) - up->port.type = PORT_16750; - } - serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); - } - serial_outp(up, UART_LCR, save_lcr); - if (up->port.type == PORT_16450) { - scratch = serial_in(up, UART_SCR); - serial_outp(up, UART_SCR, 0xa5); - status1 = serial_in(up, UART_SCR); - serial_outp(up, UART_SCR, 0x5a); - status2 = serial_in(up, UART_SCR); - serial_outp(up, UART_SCR, scratch); - - if ((status1 != 0xa5) || (status2 != 0x5a)) - up->port.type = PORT_8250; - } - - up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size; - - if (up->port.type == PORT_UNKNOWN) - goto out; - up->type_probed = up->port.type; /* XXX */ - - /* - * Reset the UART. - */ -#ifdef CONFIG_SERIAL_8250_RSA - if (up->port.type == PORT_RSA) - serial_outp(up, UART_RSA_FRR, 0); -#endif - serial_outp(up, UART_MCR, save_mcr); - serial_outp(up, UART_FCR, (UART_FCR_ENABLE_FIFO | - UART_FCR_CLEAR_RCVR | - UART_FCR_CLEAR_XMIT)); - serial_outp(up, UART_FCR, 0); - (void)serial_in(up, UART_RX); - serial_outp(up, UART_IER, 0); - -out: - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static struct uart_driver sunsu_reg = { - .owner = THIS_MODULE, - .driver_name = "sunsu", - .dev_name = "ttyS", - .major = TTY_MAJOR, -}; - -static int __devinit sunsu_kbd_ms_init(struct uart_sunsu_port *up) -{ - int quot, baud; -#ifdef CONFIG_SERIO - struct serio *serio; -#endif - - if (up->su_type == SU_PORT_KBD) { - up->cflag = B1200 | CS8 | CLOCAL | CREAD; - baud = 1200; - } else { - up->cflag = B4800 | CS8 | CLOCAL | CREAD; - baud = 4800; - } - quot = up->port.uartclk / (16 * baud); - - sunsu_autoconfig(up); - if (up->port.type == PORT_UNKNOWN) - return -ENODEV; - - printk("%s: %s port at %llx, irq %u\n", - up->port.dev->of_node->full_name, - (up->su_type == SU_PORT_KBD) ? "Keyboard" : "Mouse", - (unsigned long long) up->port.mapbase, - up->port.irq); - -#ifdef CONFIG_SERIO - serio = &up->serio; - serio->port_data = up; - - serio->id.type = SERIO_RS232; - if (up->su_type == SU_PORT_KBD) { - serio->id.proto = SERIO_SUNKBD; - strlcpy(serio->name, "sukbd", sizeof(serio->name)); - } else { - serio->id.proto = SERIO_SUN; - serio->id.extra = 1; - strlcpy(serio->name, "sums", sizeof(serio->name)); - } - strlcpy(serio->phys, - (!(up->port.line & 1) ? "su/serio0" : "su/serio1"), - sizeof(serio->phys)); - - serio->write = sunsu_serio_write; - serio->open = sunsu_serio_open; - serio->close = sunsu_serio_close; - serio->dev.parent = up->port.dev; - - serio_register_port(serio); -#endif - - sunsu_change_speed(&up->port, up->cflag, 0, quot); - - sunsu_startup(&up->port); - return 0; -} - -/* - * ------------------------------------------------------------ - * Serial console driver - * ------------------------------------------------------------ - */ - -#ifdef CONFIG_SERIAL_SUNSU_CONSOLE - -#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - -/* - * Wait for transmitter & holding register to empty - */ -static __inline__ void wait_for_xmitr(struct uart_sunsu_port *up) -{ - unsigned int status, tmout = 10000; - - /* Wait up to 10ms for the character(s) to be sent. */ - do { - status = serial_in(up, UART_LSR); - - if (status & UART_LSR_BI) - up->lsr_break_flag = UART_LSR_BI; - - if (--tmout == 0) - break; - udelay(1); - } while ((status & BOTH_EMPTY) != BOTH_EMPTY); - - /* Wait up to 1s for flow control if necessary */ - if (up->port.flags & UPF_CONS_FLOW) { - tmout = 1000000; - while (--tmout && - ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0)) - udelay(1); - } -} - -static void sunsu_console_putchar(struct uart_port *port, int ch) -{ - struct uart_sunsu_port *up = (struct uart_sunsu_port *)port; - - wait_for_xmitr(up); - serial_out(up, UART_TX, ch); -} - -/* - * Print a string to the serial port trying not to disturb - * any possible real use of the port... - */ -static void sunsu_console_write(struct console *co, const char *s, - unsigned int count) -{ - struct uart_sunsu_port *up = &sunsu_ports[co->index]; - unsigned long flags; - unsigned int ier; - int locked = 1; - - local_irq_save(flags); - if (up->port.sysrq) { - locked = 0; - } else if (oops_in_progress) { - locked = spin_trylock(&up->port.lock); - } else - spin_lock(&up->port.lock); - - /* - * First save the UER then disable the interrupts - */ - ier = serial_in(up, UART_IER); - serial_out(up, UART_IER, 0); - - uart_console_write(&up->port, s, count, sunsu_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and restore the IER - */ - wait_for_xmitr(up); - serial_out(up, UART_IER, ier); - - if (locked) - spin_unlock(&up->port.lock); - local_irq_restore(flags); -} - -/* - * Setup initial baud/bits/parity. We do two things here: - * - construct a cflag setting for the first su_open() - * - initialize the serial port - * Return non-zero if we didn't find a serial port. - */ -static int __init sunsu_console_setup(struct console *co, char *options) -{ - static struct ktermios dummy; - struct ktermios termios; - struct uart_port *port; - - printk("Console: ttyS%d (SU)\n", - (sunsu_reg.minor - 64) + co->index); - - /* - * Check whether an invalid uart number has been specified, and - * if so, search for the first available port that does have - * console support. - */ - if (co->index >= UART_NR) - co->index = 0; - port = &sunsu_ports[co->index].port; - - /* - * Temporary fix. - */ - spin_lock_init(&port->lock); - - /* Get firmware console settings. */ - sunserial_console_termios(co, port->dev->of_node); - - memset(&termios, 0, sizeof(struct ktermios)); - termios.c_cflag = co->cflag; - port->mctrl |= TIOCM_DTR; - port->ops->set_termios(port, &termios, &dummy); - - return 0; -} - -static struct console sunsu_console = { - .name = "ttyS", - .write = sunsu_console_write, - .device = uart_console_device, - .setup = sunsu_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &sunsu_reg, -}; - -/* - * Register console. - */ - -static inline struct console *SUNSU_CONSOLE(void) -{ - return &sunsu_console; -} -#else -#define SUNSU_CONSOLE() (NULL) -#define sunsu_serial_console_init() do { } while (0) -#endif - -static enum su_type __devinit su_get_type(struct device_node *dp) -{ - struct device_node *ap = of_find_node_by_path("/aliases"); - - if (ap) { - const char *keyb = of_get_property(ap, "keyboard", NULL); - const char *ms = of_get_property(ap, "mouse", NULL); - - if (keyb) { - if (dp == of_find_node_by_path(keyb)) - return SU_PORT_KBD; - } - if (ms) { - if (dp == of_find_node_by_path(ms)) - return SU_PORT_MS; - } - } - - return SU_PORT_PORT; -} - -static int __devinit su_probe(struct platform_device *op, const struct of_device_id *match) -{ - static int inst; - struct device_node *dp = op->dev.of_node; - struct uart_sunsu_port *up; - struct resource *rp; - enum su_type type; - bool ignore_line; - int err; - - type = su_get_type(dp); - if (type == SU_PORT_PORT) { - if (inst >= UART_NR) - return -EINVAL; - up = &sunsu_ports[inst]; - } else { - up = kzalloc(sizeof(*up), GFP_KERNEL); - if (!up) - return -ENOMEM; - } - - up->port.line = inst; - - spin_lock_init(&up->port.lock); - - up->su_type = type; - - rp = &op->resource[0]; - up->port.mapbase = rp->start; - up->reg_size = (rp->end - rp->start) + 1; - up->port.membase = of_ioremap(rp, 0, up->reg_size, "su"); - if (!up->port.membase) { - if (type != SU_PORT_PORT) - kfree(up); - return -ENOMEM; - } - - up->port.irq = op->archdata.irqs[0]; - - up->port.dev = &op->dev; - - up->port.type = PORT_UNKNOWN; - up->port.uartclk = (SU_BASE_BAUD * 16); - - err = 0; - if (up->su_type == SU_PORT_KBD || up->su_type == SU_PORT_MS) { - err = sunsu_kbd_ms_init(up); - if (err) { - of_iounmap(&op->resource[0], - up->port.membase, up->reg_size); - kfree(up); - return err; - } - dev_set_drvdata(&op->dev, up); - - return 0; - } - - up->port.flags |= UPF_BOOT_AUTOCONF; - - sunsu_autoconfig(up); - - err = -ENODEV; - if (up->port.type == PORT_UNKNOWN) - goto out_unmap; - - up->port.ops = &sunsu_pops; - - ignore_line = false; - if (!strcmp(dp->name, "rsc-console") || - !strcmp(dp->name, "lom-console")) - ignore_line = true; - - sunserial_console_match(SUNSU_CONSOLE(), dp, - &sunsu_reg, up->port.line, - ignore_line); - err = uart_add_one_port(&sunsu_reg, &up->port); - if (err) - goto out_unmap; - - dev_set_drvdata(&op->dev, up); - - inst++; - - return 0; - -out_unmap: - of_iounmap(&op->resource[0], up->port.membase, up->reg_size); - return err; -} - -static int __devexit su_remove(struct platform_device *op) -{ - struct uart_sunsu_port *up = dev_get_drvdata(&op->dev); - bool kbdms = false; - - if (up->su_type == SU_PORT_MS || - up->su_type == SU_PORT_KBD) - kbdms = true; - - if (kbdms) { -#ifdef CONFIG_SERIO - serio_unregister_port(&up->serio); -#endif - } else if (up->port.type != PORT_UNKNOWN) - uart_remove_one_port(&sunsu_reg, &up->port); - - if (up->port.membase) - of_iounmap(&op->resource[0], up->port.membase, up->reg_size); - - if (kbdms) - kfree(up); - - dev_set_drvdata(&op->dev, NULL); - - return 0; -} - -static const struct of_device_id su_match[] = { - { - .name = "su", - }, - { - .name = "su_pnp", - }, - { - .name = "serial", - .compatible = "su", - }, - { - .type = "serial", - .compatible = "su", - }, - {}, -}; -MODULE_DEVICE_TABLE(of, su_match); - -static struct of_platform_driver su_driver = { - .driver = { - .name = "su", - .owner = THIS_MODULE, - .of_match_table = su_match, - }, - .probe = su_probe, - .remove = __devexit_p(su_remove), -}; - -static int __init sunsu_init(void) -{ - struct device_node *dp; - int err; - int num_uart = 0; - - for_each_node_by_name(dp, "su") { - if (su_get_type(dp) == SU_PORT_PORT) - num_uart++; - } - for_each_node_by_name(dp, "su_pnp") { - if (su_get_type(dp) == SU_PORT_PORT) - num_uart++; - } - for_each_node_by_name(dp, "serial") { - if (of_device_is_compatible(dp, "su")) { - if (su_get_type(dp) == SU_PORT_PORT) - num_uart++; - } - } - for_each_node_by_type(dp, "serial") { - if (of_device_is_compatible(dp, "su")) { - if (su_get_type(dp) == SU_PORT_PORT) - num_uart++; - } - } - - if (num_uart) { - err = sunserial_register_minors(&sunsu_reg, num_uart); - if (err) - return err; - } - - err = of_register_platform_driver(&su_driver); - if (err && num_uart) - sunserial_unregister_minors(&sunsu_reg, num_uart); - - return err; -} - -static void __exit sunsu_exit(void) -{ - if (sunsu_reg.nr) - sunserial_unregister_minors(&sunsu_reg, sunsu_reg.nr); -} - -module_init(sunsu_init); -module_exit(sunsu_exit); - -MODULE_AUTHOR("Eddie C. Dost, Peter Zaitcev, and David S. Miller"); -MODULE_DESCRIPTION("Sun SU serial port driver"); -MODULE_VERSION("2.0"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/sunzilog.c b/drivers/serial/sunzilog.c deleted file mode 100644 index c1967ac1c07f..000000000000 --- a/drivers/serial/sunzilog.c +++ /dev/null @@ -1,1655 +0,0 @@ -/* sunzilog.c: Zilog serial driver for Sparc systems. - * - * Driver for Zilog serial chips found on Sun workstations and - * servers. This driver could actually be made more generic. - * - * This is based on the old drivers/sbus/char/zs.c code. A lot - * of code has been simply moved over directly from there but - * much has been rewritten. Credits therefore go out to Eddie - * C. Dost, Pete Zaitcev, Ted Ts'o and Alex Buell for their - * work there. - * - * Copyright (C) 2002, 2006, 2007 David S. Miller (davem@davemloft.net) - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/delay.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/major.h> -#include <linux/string.h> -#include <linux/ptrace.h> -#include <linux/ioport.h> -#include <linux/slab.h> -#include <linux/circ_buf.h> -#include <linux/serial.h> -#include <linux/sysrq.h> -#include <linux/console.h> -#include <linux/spinlock.h> -#ifdef CONFIG_SERIO -#include <linux/serio.h> -#endif -#include <linux/init.h> -#include <linux/of_device.h> - -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/prom.h> - -#if defined(CONFIG_SERIAL_SUNZILOG_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/serial_core.h> - -#include "suncore.h" -#include "sunzilog.h" - -/* On 32-bit sparcs we need to delay after register accesses - * to accommodate sun4 systems, but we do not need to flush writes. - * On 64-bit sparc we only need to flush single writes to ensure - * completion. - */ -#ifndef CONFIG_SPARC64 -#define ZSDELAY() udelay(5) -#define ZSDELAY_LONG() udelay(20) -#define ZS_WSYNC(channel) do { } while (0) -#else -#define ZSDELAY() -#define ZSDELAY_LONG() -#define ZS_WSYNC(__channel) \ - readb(&((__channel)->control)) -#endif - -#define ZS_CLOCK 4915200 /* Zilog input clock rate. */ -#define ZS_CLOCK_DIVISOR 16 /* Divisor this driver uses. */ - -/* - * We wrap our port structure around the generic uart_port. - */ -struct uart_sunzilog_port { - struct uart_port port; - - /* IRQ servicing chain. */ - struct uart_sunzilog_port *next; - - /* Current values of Zilog write registers. */ - unsigned char curregs[NUM_ZSREGS]; - - unsigned int flags; -#define SUNZILOG_FLAG_CONS_KEYB 0x00000001 -#define SUNZILOG_FLAG_CONS_MOUSE 0x00000002 -#define SUNZILOG_FLAG_IS_CONS 0x00000004 -#define SUNZILOG_FLAG_IS_KGDB 0x00000008 -#define SUNZILOG_FLAG_MODEM_STATUS 0x00000010 -#define SUNZILOG_FLAG_IS_CHANNEL_A 0x00000020 -#define SUNZILOG_FLAG_REGS_HELD 0x00000040 -#define SUNZILOG_FLAG_TX_STOPPED 0x00000080 -#define SUNZILOG_FLAG_TX_ACTIVE 0x00000100 -#define SUNZILOG_FLAG_ESCC 0x00000200 -#define SUNZILOG_FLAG_ISR_HANDLER 0x00000400 - - unsigned int cflag; - - unsigned char parity_mask; - unsigned char prev_status; - -#ifdef CONFIG_SERIO - struct serio serio; - int serio_open; -#endif -}; - -static void sunzilog_putchar(struct uart_port *port, int ch); - -#define ZILOG_CHANNEL_FROM_PORT(PORT) ((struct zilog_channel __iomem *)((PORT)->membase)) -#define UART_ZILOG(PORT) ((struct uart_sunzilog_port *)(PORT)) - -#define ZS_IS_KEYB(UP) ((UP)->flags & SUNZILOG_FLAG_CONS_KEYB) -#define ZS_IS_MOUSE(UP) ((UP)->flags & SUNZILOG_FLAG_CONS_MOUSE) -#define ZS_IS_CONS(UP) ((UP)->flags & SUNZILOG_FLAG_IS_CONS) -#define ZS_IS_KGDB(UP) ((UP)->flags & SUNZILOG_FLAG_IS_KGDB) -#define ZS_WANTS_MODEM_STATUS(UP) ((UP)->flags & SUNZILOG_FLAG_MODEM_STATUS) -#define ZS_IS_CHANNEL_A(UP) ((UP)->flags & SUNZILOG_FLAG_IS_CHANNEL_A) -#define ZS_REGS_HELD(UP) ((UP)->flags & SUNZILOG_FLAG_REGS_HELD) -#define ZS_TX_STOPPED(UP) ((UP)->flags & SUNZILOG_FLAG_TX_STOPPED) -#define ZS_TX_ACTIVE(UP) ((UP)->flags & SUNZILOG_FLAG_TX_ACTIVE) - -/* Reading and writing Zilog8530 registers. The delays are to make this - * driver work on the Sun4 which needs a settling delay after each chip - * register access, other machines handle this in hardware via auxiliary - * flip-flops which implement the settle time we do in software. - * - * The port lock must be held and local IRQs must be disabled - * when {read,write}_zsreg is invoked. - */ -static unsigned char read_zsreg(struct zilog_channel __iomem *channel, - unsigned char reg) -{ - unsigned char retval; - - writeb(reg, &channel->control); - ZSDELAY(); - retval = readb(&channel->control); - ZSDELAY(); - - return retval; -} - -static void write_zsreg(struct zilog_channel __iomem *channel, - unsigned char reg, unsigned char value) -{ - writeb(reg, &channel->control); - ZSDELAY(); - writeb(value, &channel->control); - ZSDELAY(); -} - -static void sunzilog_clear_fifo(struct zilog_channel __iomem *channel) -{ - int i; - - for (i = 0; i < 32; i++) { - unsigned char regval; - - regval = readb(&channel->control); - ZSDELAY(); - if (regval & Rx_CH_AV) - break; - - regval = read_zsreg(channel, R1); - readb(&channel->data); - ZSDELAY(); - - if (regval & (PAR_ERR | Rx_OVR | CRC_ERR)) { - writeb(ERR_RES, &channel->control); - ZSDELAY(); - ZS_WSYNC(channel); - } - } -} - -/* This function must only be called when the TX is not busy. The UART - * port lock must be held and local interrupts disabled. - */ -static int __load_zsregs(struct zilog_channel __iomem *channel, unsigned char *regs) -{ - int i; - int escc; - unsigned char r15; - - /* Let pending transmits finish. */ - for (i = 0; i < 1000; i++) { - unsigned char stat = read_zsreg(channel, R1); - if (stat & ALL_SNT) - break; - udelay(100); - } - - writeb(ERR_RES, &channel->control); - ZSDELAY(); - ZS_WSYNC(channel); - - sunzilog_clear_fifo(channel); - - /* Disable all interrupts. */ - write_zsreg(channel, R1, - regs[R1] & ~(RxINT_MASK | TxINT_ENAB | EXT_INT_ENAB)); - - /* Set parity, sync config, stop bits, and clock divisor. */ - write_zsreg(channel, R4, regs[R4]); - - /* Set misc. TX/RX control bits. */ - write_zsreg(channel, R10, regs[R10]); - - /* Set TX/RX controls sans the enable bits. */ - write_zsreg(channel, R3, regs[R3] & ~RxENAB); - write_zsreg(channel, R5, regs[R5] & ~TxENAB); - - /* Synchronous mode config. */ - write_zsreg(channel, R6, regs[R6]); - write_zsreg(channel, R7, regs[R7]); - - /* Don't mess with the interrupt vector (R2, unused by us) and - * master interrupt control (R9). We make sure this is setup - * properly at probe time then never touch it again. - */ - - /* Disable baud generator. */ - write_zsreg(channel, R14, regs[R14] & ~BRENAB); - - /* Clock mode control. */ - write_zsreg(channel, R11, regs[R11]); - - /* Lower and upper byte of baud rate generator divisor. */ - write_zsreg(channel, R12, regs[R12]); - write_zsreg(channel, R13, regs[R13]); - - /* Now rewrite R14, with BRENAB (if set). */ - write_zsreg(channel, R14, regs[R14]); - - /* External status interrupt control. */ - write_zsreg(channel, R15, (regs[R15] | WR7pEN) & ~FIFOEN); - - /* ESCC Extension Register */ - r15 = read_zsreg(channel, R15); - if (r15 & 0x01) { - write_zsreg(channel, R7, regs[R7p]); - - /* External status interrupt and FIFO control. */ - write_zsreg(channel, R15, regs[R15] & ~WR7pEN); - escc = 1; - } else { - /* Clear FIFO bit case it is an issue */ - regs[R15] &= ~FIFOEN; - escc = 0; - } - - /* Reset external status interrupts. */ - write_zsreg(channel, R0, RES_EXT_INT); /* First Latch */ - write_zsreg(channel, R0, RES_EXT_INT); /* Second Latch */ - - /* Rewrite R3/R5, this time without enables masked. */ - write_zsreg(channel, R3, regs[R3]); - write_zsreg(channel, R5, regs[R5]); - - /* Rewrite R1, this time without IRQ enabled masked. */ - write_zsreg(channel, R1, regs[R1]); - - return escc; -} - -/* Reprogram the Zilog channel HW registers with the copies found in the - * software state struct. If the transmitter is busy, we defer this update - * until the next TX complete interrupt. Else, we do it right now. - * - * The UART port lock must be held and local interrupts disabled. - */ -static void sunzilog_maybe_update_regs(struct uart_sunzilog_port *up, - struct zilog_channel __iomem *channel) -{ - if (!ZS_REGS_HELD(up)) { - if (ZS_TX_ACTIVE(up)) { - up->flags |= SUNZILOG_FLAG_REGS_HELD; - } else { - __load_zsregs(channel, up->curregs); - } - } -} - -static void sunzilog_change_mouse_baud(struct uart_sunzilog_port *up) -{ - unsigned int cur_cflag = up->cflag; - int brg, new_baud; - - up->cflag &= ~CBAUD; - up->cflag |= suncore_mouse_baud_cflag_next(cur_cflag, &new_baud); - - brg = BPS_TO_BRG(new_baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); - up->curregs[R12] = (brg & 0xff); - up->curregs[R13] = (brg >> 8) & 0xff; - sunzilog_maybe_update_regs(up, ZILOG_CHANNEL_FROM_PORT(&up->port)); -} - -static void sunzilog_kbdms_receive_chars(struct uart_sunzilog_port *up, - unsigned char ch, int is_break) -{ - if (ZS_IS_KEYB(up)) { - /* Stop-A is handled by drivers/char/keyboard.c now. */ -#ifdef CONFIG_SERIO - if (up->serio_open) - serio_interrupt(&up->serio, ch, 0); -#endif - } else if (ZS_IS_MOUSE(up)) { - int ret = suncore_mouse_baud_detection(ch, is_break); - - switch (ret) { - case 2: - sunzilog_change_mouse_baud(up); - /* fallthru */ - case 1: - break; - - case 0: -#ifdef CONFIG_SERIO - if (up->serio_open) - serio_interrupt(&up->serio, ch, 0); -#endif - break; - }; - } -} - -static struct tty_struct * -sunzilog_receive_chars(struct uart_sunzilog_port *up, - struct zilog_channel __iomem *channel) -{ - struct tty_struct *tty; - unsigned char ch, r1, flag; - - tty = NULL; - if (up->port.state != NULL && /* Unopened serial console */ - up->port.state->port.tty != NULL) /* Keyboard || mouse */ - tty = up->port.state->port.tty; - - for (;;) { - - r1 = read_zsreg(channel, R1); - if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR)) { - writeb(ERR_RES, &channel->control); - ZSDELAY(); - ZS_WSYNC(channel); - } - - ch = readb(&channel->control); - ZSDELAY(); - - /* This funny hack depends upon BRK_ABRT not interfering - * with the other bits we care about in R1. - */ - if (ch & BRK_ABRT) - r1 |= BRK_ABRT; - - if (!(ch & Rx_CH_AV)) - break; - - ch = readb(&channel->data); - ZSDELAY(); - - ch &= up->parity_mask; - - if (unlikely(ZS_IS_KEYB(up)) || unlikely(ZS_IS_MOUSE(up))) { - sunzilog_kbdms_receive_chars(up, ch, 0); - continue; - } - - if (tty == NULL) { - uart_handle_sysrq_char(&up->port, ch); - continue; - } - - /* A real serial line, record the character and status. */ - flag = TTY_NORMAL; - up->port.icount.rx++; - if (r1 & (BRK_ABRT | PAR_ERR | Rx_OVR | CRC_ERR)) { - if (r1 & BRK_ABRT) { - r1 &= ~(PAR_ERR | CRC_ERR); - up->port.icount.brk++; - if (uart_handle_break(&up->port)) - continue; - } - else if (r1 & PAR_ERR) - up->port.icount.parity++; - else if (r1 & CRC_ERR) - up->port.icount.frame++; - if (r1 & Rx_OVR) - up->port.icount.overrun++; - r1 &= up->port.read_status_mask; - if (r1 & BRK_ABRT) - flag = TTY_BREAK; - else if (r1 & PAR_ERR) - flag = TTY_PARITY; - else if (r1 & CRC_ERR) - flag = TTY_FRAME; - } - if (uart_handle_sysrq_char(&up->port, ch)) - continue; - - if (up->port.ignore_status_mask == 0xff || - (r1 & up->port.ignore_status_mask) == 0) { - tty_insert_flip_char(tty, ch, flag); - } - if (r1 & Rx_OVR) - tty_insert_flip_char(tty, 0, TTY_OVERRUN); - } - - return tty; -} - -static void sunzilog_status_handle(struct uart_sunzilog_port *up, - struct zilog_channel __iomem *channel) -{ - unsigned char status; - - status = readb(&channel->control); - ZSDELAY(); - - writeb(RES_EXT_INT, &channel->control); - ZSDELAY(); - ZS_WSYNC(channel); - - if (status & BRK_ABRT) { - if (ZS_IS_MOUSE(up)) - sunzilog_kbdms_receive_chars(up, 0, 1); - if (ZS_IS_CONS(up)) { - /* Wait for BREAK to deassert to avoid potentially - * confusing the PROM. - */ - while (1) { - status = readb(&channel->control); - ZSDELAY(); - if (!(status & BRK_ABRT)) - break; - } - sun_do_break(); - return; - } - } - - if (ZS_WANTS_MODEM_STATUS(up)) { - if (status & SYNC) - up->port.icount.dsr++; - - /* The Zilog just gives us an interrupt when DCD/CTS/etc. change. - * But it does not tell us which bit has changed, we have to keep - * track of this ourselves. - */ - if ((status ^ up->prev_status) ^ DCD) - uart_handle_dcd_change(&up->port, - (status & DCD)); - if ((status ^ up->prev_status) ^ CTS) - uart_handle_cts_change(&up->port, - (status & CTS)); - - wake_up_interruptible(&up->port.state->port.delta_msr_wait); - } - - up->prev_status = status; -} - -static void sunzilog_transmit_chars(struct uart_sunzilog_port *up, - struct zilog_channel __iomem *channel) -{ - struct circ_buf *xmit; - - if (ZS_IS_CONS(up)) { - unsigned char status = readb(&channel->control); - ZSDELAY(); - - /* TX still busy? Just wait for the next TX done interrupt. - * - * It can occur because of how we do serial console writes. It would - * be nice to transmit console writes just like we normally would for - * a TTY line. (ie. buffered and TX interrupt driven). That is not - * easy because console writes cannot sleep. One solution might be - * to poll on enough port->xmit space becomming free. -DaveM - */ - if (!(status & Tx_BUF_EMP)) - return; - } - - up->flags &= ~SUNZILOG_FLAG_TX_ACTIVE; - - if (ZS_REGS_HELD(up)) { - __load_zsregs(channel, up->curregs); - up->flags &= ~SUNZILOG_FLAG_REGS_HELD; - } - - if (ZS_TX_STOPPED(up)) { - up->flags &= ~SUNZILOG_FLAG_TX_STOPPED; - goto ack_tx_int; - } - - if (up->port.x_char) { - up->flags |= SUNZILOG_FLAG_TX_ACTIVE; - writeb(up->port.x_char, &channel->data); - ZSDELAY(); - ZS_WSYNC(channel); - - up->port.icount.tx++; - up->port.x_char = 0; - return; - } - - if (up->port.state == NULL) - goto ack_tx_int; - xmit = &up->port.state->xmit; - if (uart_circ_empty(xmit)) - goto ack_tx_int; - - if (uart_tx_stopped(&up->port)) - goto ack_tx_int; - - up->flags |= SUNZILOG_FLAG_TX_ACTIVE; - writeb(xmit->buf[xmit->tail], &channel->data); - ZSDELAY(); - ZS_WSYNC(channel); - - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - up->port.icount.tx++; - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&up->port); - - return; - -ack_tx_int: - writeb(RES_Tx_P, &channel->control); - ZSDELAY(); - ZS_WSYNC(channel); -} - -static irqreturn_t sunzilog_interrupt(int irq, void *dev_id) -{ - struct uart_sunzilog_port *up = dev_id; - - while (up) { - struct zilog_channel __iomem *channel - = ZILOG_CHANNEL_FROM_PORT(&up->port); - struct tty_struct *tty; - unsigned char r3; - - spin_lock(&up->port.lock); - r3 = read_zsreg(channel, R3); - - /* Channel A */ - tty = NULL; - if (r3 & (CHAEXT | CHATxIP | CHARxIP)) { - writeb(RES_H_IUS, &channel->control); - ZSDELAY(); - ZS_WSYNC(channel); - - if (r3 & CHARxIP) - tty = sunzilog_receive_chars(up, channel); - if (r3 & CHAEXT) - sunzilog_status_handle(up, channel); - if (r3 & CHATxIP) - sunzilog_transmit_chars(up, channel); - } - spin_unlock(&up->port.lock); - - if (tty) - tty_flip_buffer_push(tty); - - /* Channel B */ - up = up->next; - channel = ZILOG_CHANNEL_FROM_PORT(&up->port); - - spin_lock(&up->port.lock); - tty = NULL; - if (r3 & (CHBEXT | CHBTxIP | CHBRxIP)) { - writeb(RES_H_IUS, &channel->control); - ZSDELAY(); - ZS_WSYNC(channel); - - if (r3 & CHBRxIP) - tty = sunzilog_receive_chars(up, channel); - if (r3 & CHBEXT) - sunzilog_status_handle(up, channel); - if (r3 & CHBTxIP) - sunzilog_transmit_chars(up, channel); - } - spin_unlock(&up->port.lock); - - if (tty) - tty_flip_buffer_push(tty); - - up = up->next; - } - - return IRQ_HANDLED; -} - -/* A convenient way to quickly get R0 status. The caller must _not_ hold the - * port lock, it is acquired here. - */ -static __inline__ unsigned char sunzilog_read_channel_status(struct uart_port *port) -{ - struct zilog_channel __iomem *channel; - unsigned char status; - - channel = ZILOG_CHANNEL_FROM_PORT(port); - status = readb(&channel->control); - ZSDELAY(); - - return status; -} - -/* The port lock is not held. */ -static unsigned int sunzilog_tx_empty(struct uart_port *port) -{ - unsigned long flags; - unsigned char status; - unsigned int ret; - - spin_lock_irqsave(&port->lock, flags); - - status = sunzilog_read_channel_status(port); - - spin_unlock_irqrestore(&port->lock, flags); - - if (status & Tx_BUF_EMP) - ret = TIOCSER_TEMT; - else - ret = 0; - - return ret; -} - -/* The port lock is held and interrupts are disabled. */ -static unsigned int sunzilog_get_mctrl(struct uart_port *port) -{ - unsigned char status; - unsigned int ret; - - status = sunzilog_read_channel_status(port); - - ret = 0; - if (status & DCD) - ret |= TIOCM_CAR; - if (status & SYNC) - ret |= TIOCM_DSR; - if (status & CTS) - ret |= TIOCM_CTS; - - return ret; -} - -/* The port lock is held and interrupts are disabled. */ -static void sunzilog_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; - struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); - unsigned char set_bits, clear_bits; - - set_bits = clear_bits = 0; - - if (mctrl & TIOCM_RTS) - set_bits |= RTS; - else - clear_bits |= RTS; - if (mctrl & TIOCM_DTR) - set_bits |= DTR; - else - clear_bits |= DTR; - - /* NOTE: Not subject to 'transmitter active' rule. */ - up->curregs[R5] |= set_bits; - up->curregs[R5] &= ~clear_bits; - write_zsreg(channel, R5, up->curregs[R5]); -} - -/* The port lock is held and interrupts are disabled. */ -static void sunzilog_stop_tx(struct uart_port *port) -{ - struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; - - up->flags |= SUNZILOG_FLAG_TX_STOPPED; -} - -/* The port lock is held and interrupts are disabled. */ -static void sunzilog_start_tx(struct uart_port *port) -{ - struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; - struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); - unsigned char status; - - up->flags |= SUNZILOG_FLAG_TX_ACTIVE; - up->flags &= ~SUNZILOG_FLAG_TX_STOPPED; - - status = readb(&channel->control); - ZSDELAY(); - - /* TX busy? Just wait for the TX done interrupt. */ - if (!(status & Tx_BUF_EMP)) - return; - - /* Send the first character to jump-start the TX done - * IRQ sending engine. - */ - if (port->x_char) { - writeb(port->x_char, &channel->data); - ZSDELAY(); - ZS_WSYNC(channel); - - port->icount.tx++; - port->x_char = 0; - } else { - struct circ_buf *xmit = &port->state->xmit; - - writeb(xmit->buf[xmit->tail], &channel->data); - ZSDELAY(); - ZS_WSYNC(channel); - - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&up->port); - } -} - -/* The port lock is held. */ -static void sunzilog_stop_rx(struct uart_port *port) -{ - struct uart_sunzilog_port *up = UART_ZILOG(port); - struct zilog_channel __iomem *channel; - - if (ZS_IS_CONS(up)) - return; - - channel = ZILOG_CHANNEL_FROM_PORT(port); - - /* Disable all RX interrupts. */ - up->curregs[R1] &= ~RxINT_MASK; - sunzilog_maybe_update_regs(up, channel); -} - -/* The port lock is held. */ -static void sunzilog_enable_ms(struct uart_port *port) -{ - struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; - struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); - unsigned char new_reg; - - new_reg = up->curregs[R15] | (DCDIE | SYNCIE | CTSIE); - if (new_reg != up->curregs[R15]) { - up->curregs[R15] = new_reg; - - /* NOTE: Not subject to 'transmitter active' rule. */ - write_zsreg(channel, R15, up->curregs[R15] & ~WR7pEN); - } -} - -/* The port lock is not held. */ -static void sunzilog_break_ctl(struct uart_port *port, int break_state) -{ - struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; - struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); - unsigned char set_bits, clear_bits, new_reg; - unsigned long flags; - - set_bits = clear_bits = 0; - - if (break_state) - set_bits |= SND_BRK; - else - clear_bits |= SND_BRK; - - spin_lock_irqsave(&port->lock, flags); - - new_reg = (up->curregs[R5] | set_bits) & ~clear_bits; - if (new_reg != up->curregs[R5]) { - up->curregs[R5] = new_reg; - - /* NOTE: Not subject to 'transmitter active' rule. */ - write_zsreg(channel, R5, up->curregs[R5]); - } - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void __sunzilog_startup(struct uart_sunzilog_port *up) -{ - struct zilog_channel __iomem *channel; - - channel = ZILOG_CHANNEL_FROM_PORT(&up->port); - up->prev_status = readb(&channel->control); - - /* Enable receiver and transmitter. */ - up->curregs[R3] |= RxENAB; - up->curregs[R5] |= TxENAB; - - up->curregs[R1] |= EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; - sunzilog_maybe_update_regs(up, channel); -} - -static int sunzilog_startup(struct uart_port *port) -{ - struct uart_sunzilog_port *up = UART_ZILOG(port); - unsigned long flags; - - if (ZS_IS_CONS(up)) - return 0; - - spin_lock_irqsave(&port->lock, flags); - __sunzilog_startup(up); - spin_unlock_irqrestore(&port->lock, flags); - return 0; -} - -/* - * The test for ZS_IS_CONS is explained by the following e-mail: - ***** - * From: Russell King <rmk@arm.linux.org.uk> - * Date: Sun, 8 Dec 2002 10:18:38 +0000 - * - * On Sun, Dec 08, 2002 at 02:43:36AM -0500, Pete Zaitcev wrote: - * > I boot my 2.5 boxes using "console=ttyS0,9600" argument, - * > and I noticed that something is not right with reference - * > counting in this case. It seems that when the console - * > is open by kernel initially, this is not accounted - * > as an open, and uart_startup is not called. - * - * That is correct. We are unable to call uart_startup when the serial - * console is initialised because it may need to allocate memory (as - * request_irq does) and the memory allocators may not have been - * initialised. - * - * 1. initialise the port into a state where it can send characters in the - * console write method. - * - * 2. don't do the actual hardware shutdown in your shutdown() method (but - * do the normal software shutdown - ie, free irqs etc) - ***** - */ -static void sunzilog_shutdown(struct uart_port *port) -{ - struct uart_sunzilog_port *up = UART_ZILOG(port); - struct zilog_channel __iomem *channel; - unsigned long flags; - - if (ZS_IS_CONS(up)) - return; - - spin_lock_irqsave(&port->lock, flags); - - channel = ZILOG_CHANNEL_FROM_PORT(port); - - /* Disable receiver and transmitter. */ - up->curregs[R3] &= ~RxENAB; - up->curregs[R5] &= ~TxENAB; - - /* Disable all interrupts and BRK assertion. */ - up->curregs[R1] &= ~(EXT_INT_ENAB | TxINT_ENAB | RxINT_MASK); - up->curregs[R5] &= ~SND_BRK; - sunzilog_maybe_update_regs(up, channel); - - spin_unlock_irqrestore(&port->lock, flags); -} - -/* Shared by TTY driver and serial console setup. The port lock is held - * and local interrupts are disabled. - */ -static void -sunzilog_convert_to_zs(struct uart_sunzilog_port *up, unsigned int cflag, - unsigned int iflag, int brg) -{ - - up->curregs[R10] = NRZ; - up->curregs[R11] = TCBR | RCBR; - - /* Program BAUD and clock source. */ - up->curregs[R4] &= ~XCLK_MASK; - up->curregs[R4] |= X16CLK; - up->curregs[R12] = brg & 0xff; - up->curregs[R13] = (brg >> 8) & 0xff; - up->curregs[R14] = BRSRC | BRENAB; - - /* Character size, stop bits, and parity. */ - up->curregs[R3] &= ~RxN_MASK; - up->curregs[R5] &= ~TxN_MASK; - switch (cflag & CSIZE) { - case CS5: - up->curregs[R3] |= Rx5; - up->curregs[R5] |= Tx5; - up->parity_mask = 0x1f; - break; - case CS6: - up->curregs[R3] |= Rx6; - up->curregs[R5] |= Tx6; - up->parity_mask = 0x3f; - break; - case CS7: - up->curregs[R3] |= Rx7; - up->curregs[R5] |= Tx7; - up->parity_mask = 0x7f; - break; - case CS8: - default: - up->curregs[R3] |= Rx8; - up->curregs[R5] |= Tx8; - up->parity_mask = 0xff; - break; - }; - up->curregs[R4] &= ~0x0c; - if (cflag & CSTOPB) - up->curregs[R4] |= SB2; - else - up->curregs[R4] |= SB1; - if (cflag & PARENB) - up->curregs[R4] |= PAR_ENAB; - else - up->curregs[R4] &= ~PAR_ENAB; - if (!(cflag & PARODD)) - up->curregs[R4] |= PAR_EVEN; - else - up->curregs[R4] &= ~PAR_EVEN; - - up->port.read_status_mask = Rx_OVR; - if (iflag & INPCK) - up->port.read_status_mask |= CRC_ERR | PAR_ERR; - if (iflag & (BRKINT | PARMRK)) - up->port.read_status_mask |= BRK_ABRT; - - up->port.ignore_status_mask = 0; - if (iflag & IGNPAR) - up->port.ignore_status_mask |= CRC_ERR | PAR_ERR; - if (iflag & IGNBRK) { - up->port.ignore_status_mask |= BRK_ABRT; - if (iflag & IGNPAR) - up->port.ignore_status_mask |= Rx_OVR; - } - - if ((cflag & CREAD) == 0) - up->port.ignore_status_mask = 0xff; -} - -/* The port lock is not held. */ -static void -sunzilog_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; - unsigned long flags; - int baud, brg; - - baud = uart_get_baud_rate(port, termios, old, 1200, 76800); - - spin_lock_irqsave(&up->port.lock, flags); - - brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); - - sunzilog_convert_to_zs(up, termios->c_cflag, termios->c_iflag, brg); - - if (UART_ENABLE_MS(&up->port, termios->c_cflag)) - up->flags |= SUNZILOG_FLAG_MODEM_STATUS; - else - up->flags &= ~SUNZILOG_FLAG_MODEM_STATUS; - - up->cflag = termios->c_cflag; - - sunzilog_maybe_update_regs(up, ZILOG_CHANNEL_FROM_PORT(port)); - - uart_update_timeout(port, termios->c_cflag, baud); - - spin_unlock_irqrestore(&up->port.lock, flags); -} - -static const char *sunzilog_type(struct uart_port *port) -{ - struct uart_sunzilog_port *up = UART_ZILOG(port); - - return (up->flags & SUNZILOG_FLAG_ESCC) ? "zs (ESCC)" : "zs"; -} - -/* We do not request/release mappings of the registers here, this - * happens at early serial probe time. - */ -static void sunzilog_release_port(struct uart_port *port) -{ -} - -static int sunzilog_request_port(struct uart_port *port) -{ - return 0; -} - -/* These do not need to do anything interesting either. */ -static void sunzilog_config_port(struct uart_port *port, int flags) -{ -} - -/* We do not support letting the user mess with the divisor, IRQ, etc. */ -static int sunzilog_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - return -EINVAL; -} - -#ifdef CONFIG_CONSOLE_POLL -static int sunzilog_get_poll_char(struct uart_port *port) -{ - unsigned char ch, r1; - struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port; - struct zilog_channel __iomem *channel - = ZILOG_CHANNEL_FROM_PORT(&up->port); - - - r1 = read_zsreg(channel, R1); - if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR)) { - writeb(ERR_RES, &channel->control); - ZSDELAY(); - ZS_WSYNC(channel); - } - - ch = readb(&channel->control); - ZSDELAY(); - - /* This funny hack depends upon BRK_ABRT not interfering - * with the other bits we care about in R1. - */ - if (ch & BRK_ABRT) - r1 |= BRK_ABRT; - - if (!(ch & Rx_CH_AV)) - return NO_POLL_CHAR; - - ch = readb(&channel->data); - ZSDELAY(); - - ch &= up->parity_mask; - return ch; -} - -static void sunzilog_put_poll_char(struct uart_port *port, - unsigned char ch) -{ - struct uart_sunzilog_port *up = (struct uart_sunzilog_port *)port; - - sunzilog_putchar(&up->port, ch); -} -#endif /* CONFIG_CONSOLE_POLL */ - -static struct uart_ops sunzilog_pops = { - .tx_empty = sunzilog_tx_empty, - .set_mctrl = sunzilog_set_mctrl, - .get_mctrl = sunzilog_get_mctrl, - .stop_tx = sunzilog_stop_tx, - .start_tx = sunzilog_start_tx, - .stop_rx = sunzilog_stop_rx, - .enable_ms = sunzilog_enable_ms, - .break_ctl = sunzilog_break_ctl, - .startup = sunzilog_startup, - .shutdown = sunzilog_shutdown, - .set_termios = sunzilog_set_termios, - .type = sunzilog_type, - .release_port = sunzilog_release_port, - .request_port = sunzilog_request_port, - .config_port = sunzilog_config_port, - .verify_port = sunzilog_verify_port, -#ifdef CONFIG_CONSOLE_POLL - .poll_get_char = sunzilog_get_poll_char, - .poll_put_char = sunzilog_put_poll_char, -#endif -}; - -static int uart_chip_count; -static struct uart_sunzilog_port *sunzilog_port_table; -static struct zilog_layout __iomem **sunzilog_chip_regs; - -static struct uart_sunzilog_port *sunzilog_irq_chain; - -static struct uart_driver sunzilog_reg = { - .owner = THIS_MODULE, - .driver_name = "sunzilog", - .dev_name = "ttyS", - .major = TTY_MAJOR, -}; - -static int __init sunzilog_alloc_tables(int num_sunzilog) -{ - struct uart_sunzilog_port *up; - unsigned long size; - int num_channels = num_sunzilog * 2; - int i; - - size = num_channels * sizeof(struct uart_sunzilog_port); - sunzilog_port_table = kzalloc(size, GFP_KERNEL); - if (!sunzilog_port_table) - return -ENOMEM; - - for (i = 0; i < num_channels; i++) { - up = &sunzilog_port_table[i]; - - spin_lock_init(&up->port.lock); - - if (i == 0) - sunzilog_irq_chain = up; - - if (i < num_channels - 1) - up->next = up + 1; - else - up->next = NULL; - } - - size = num_sunzilog * sizeof(struct zilog_layout __iomem *); - sunzilog_chip_regs = kzalloc(size, GFP_KERNEL); - if (!sunzilog_chip_regs) { - kfree(sunzilog_port_table); - sunzilog_irq_chain = NULL; - return -ENOMEM; - } - - return 0; -} - -static void sunzilog_free_tables(void) -{ - kfree(sunzilog_port_table); - sunzilog_irq_chain = NULL; - kfree(sunzilog_chip_regs); -} - -#define ZS_PUT_CHAR_MAX_DELAY 2000 /* 10 ms */ - -static void sunzilog_putchar(struct uart_port *port, int ch) -{ - struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port); - int loops = ZS_PUT_CHAR_MAX_DELAY; - - /* This is a timed polling loop so do not switch the explicit - * udelay with ZSDELAY as that is a NOP on some platforms. -DaveM - */ - do { - unsigned char val = readb(&channel->control); - if (val & Tx_BUF_EMP) { - ZSDELAY(); - break; - } - udelay(5); - } while (--loops); - - writeb(ch, &channel->data); - ZSDELAY(); - ZS_WSYNC(channel); -} - -#ifdef CONFIG_SERIO - -static DEFINE_SPINLOCK(sunzilog_serio_lock); - -static int sunzilog_serio_write(struct serio *serio, unsigned char ch) -{ - struct uart_sunzilog_port *up = serio->port_data; - unsigned long flags; - - spin_lock_irqsave(&sunzilog_serio_lock, flags); - - sunzilog_putchar(&up->port, ch); - - spin_unlock_irqrestore(&sunzilog_serio_lock, flags); - - return 0; -} - -static int sunzilog_serio_open(struct serio *serio) -{ - struct uart_sunzilog_port *up = serio->port_data; - unsigned long flags; - int ret; - - spin_lock_irqsave(&sunzilog_serio_lock, flags); - if (!up->serio_open) { - up->serio_open = 1; - ret = 0; - } else - ret = -EBUSY; - spin_unlock_irqrestore(&sunzilog_serio_lock, flags); - - return ret; -} - -static void sunzilog_serio_close(struct serio *serio) -{ - struct uart_sunzilog_port *up = serio->port_data; - unsigned long flags; - - spin_lock_irqsave(&sunzilog_serio_lock, flags); - up->serio_open = 0; - spin_unlock_irqrestore(&sunzilog_serio_lock, flags); -} - -#endif /* CONFIG_SERIO */ - -#ifdef CONFIG_SERIAL_SUNZILOG_CONSOLE -static void -sunzilog_console_write(struct console *con, const char *s, unsigned int count) -{ - struct uart_sunzilog_port *up = &sunzilog_port_table[con->index]; - unsigned long flags; - int locked = 1; - - local_irq_save(flags); - if (up->port.sysrq) { - locked = 0; - } else if (oops_in_progress) { - locked = spin_trylock(&up->port.lock); - } else - spin_lock(&up->port.lock); - - uart_console_write(&up->port, s, count, sunzilog_putchar); - udelay(2); - - if (locked) - spin_unlock(&up->port.lock); - local_irq_restore(flags); -} - -static int __init sunzilog_console_setup(struct console *con, char *options) -{ - struct uart_sunzilog_port *up = &sunzilog_port_table[con->index]; - unsigned long flags; - int baud, brg; - - if (up->port.type != PORT_SUNZILOG) - return -1; - - printk(KERN_INFO "Console: ttyS%d (SunZilog zs%d)\n", - (sunzilog_reg.minor - 64) + con->index, con->index); - - /* Get firmware console settings. */ - sunserial_console_termios(con, up->port.dev->of_node); - - /* Firmware console speed is limited to 150-->38400 baud so - * this hackish cflag thing is OK. - */ - switch (con->cflag & CBAUD) { - case B150: baud = 150; break; - case B300: baud = 300; break; - case B600: baud = 600; break; - case B1200: baud = 1200; break; - case B2400: baud = 2400; break; - case B4800: baud = 4800; break; - default: case B9600: baud = 9600; break; - case B19200: baud = 19200; break; - case B38400: baud = 38400; break; - }; - - brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); - - spin_lock_irqsave(&up->port.lock, flags); - - up->curregs[R15] |= BRKIE; - sunzilog_convert_to_zs(up, con->cflag, 0, brg); - - sunzilog_set_mctrl(&up->port, TIOCM_DTR | TIOCM_RTS); - __sunzilog_startup(up); - - spin_unlock_irqrestore(&up->port.lock, flags); - - return 0; -} - -static struct console sunzilog_console_ops = { - .name = "ttyS", - .write = sunzilog_console_write, - .device = uart_console_device, - .setup = sunzilog_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &sunzilog_reg, -}; - -static inline struct console *SUNZILOG_CONSOLE(void) -{ - return &sunzilog_console_ops; -} - -#else -#define SUNZILOG_CONSOLE() (NULL) -#endif - -static void __devinit sunzilog_init_kbdms(struct uart_sunzilog_port *up) -{ - int baud, brg; - - if (up->flags & SUNZILOG_FLAG_CONS_KEYB) { - up->cflag = B1200 | CS8 | CLOCAL | CREAD; - baud = 1200; - } else { - up->cflag = B4800 | CS8 | CLOCAL | CREAD; - baud = 4800; - } - - up->curregs[R15] |= BRKIE; - brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); - sunzilog_convert_to_zs(up, up->cflag, 0, brg); - sunzilog_set_mctrl(&up->port, TIOCM_DTR | TIOCM_RTS); - __sunzilog_startup(up); -} - -#ifdef CONFIG_SERIO -static void __devinit sunzilog_register_serio(struct uart_sunzilog_port *up) -{ - struct serio *serio = &up->serio; - - serio->port_data = up; - - serio->id.type = SERIO_RS232; - if (up->flags & SUNZILOG_FLAG_CONS_KEYB) { - serio->id.proto = SERIO_SUNKBD; - strlcpy(serio->name, "zskbd", sizeof(serio->name)); - } else { - serio->id.proto = SERIO_SUN; - serio->id.extra = 1; - strlcpy(serio->name, "zsms", sizeof(serio->name)); - } - strlcpy(serio->phys, - ((up->flags & SUNZILOG_FLAG_CONS_KEYB) ? - "zs/serio0" : "zs/serio1"), - sizeof(serio->phys)); - - serio->write = sunzilog_serio_write; - serio->open = sunzilog_serio_open; - serio->close = sunzilog_serio_close; - serio->dev.parent = up->port.dev; - - serio_register_port(serio); -} -#endif - -static void __devinit sunzilog_init_hw(struct uart_sunzilog_port *up) -{ - struct zilog_channel __iomem *channel; - unsigned long flags; - int baud, brg; - - channel = ZILOG_CHANNEL_FROM_PORT(&up->port); - - spin_lock_irqsave(&up->port.lock, flags); - if (ZS_IS_CHANNEL_A(up)) { - write_zsreg(channel, R9, FHWRES); - ZSDELAY_LONG(); - (void) read_zsreg(channel, R0); - } - - if (up->flags & (SUNZILOG_FLAG_CONS_KEYB | - SUNZILOG_FLAG_CONS_MOUSE)) { - up->curregs[R1] = EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; - up->curregs[R4] = PAR_EVEN | X16CLK | SB1; - up->curregs[R3] = RxENAB | Rx8; - up->curregs[R5] = TxENAB | Tx8; - up->curregs[R6] = 0x00; /* SDLC Address */ - up->curregs[R7] = 0x7E; /* SDLC Flag */ - up->curregs[R9] = NV; - up->curregs[R7p] = 0x00; - sunzilog_init_kbdms(up); - /* Only enable interrupts if an ISR handler available */ - if (up->flags & SUNZILOG_FLAG_ISR_HANDLER) - up->curregs[R9] |= MIE; - write_zsreg(channel, R9, up->curregs[R9]); - } else { - /* Normal serial TTY. */ - up->parity_mask = 0xff; - up->curregs[R1] = EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB; - up->curregs[R4] = PAR_EVEN | X16CLK | SB1; - up->curregs[R3] = RxENAB | Rx8; - up->curregs[R5] = TxENAB | Tx8; - up->curregs[R6] = 0x00; /* SDLC Address */ - up->curregs[R7] = 0x7E; /* SDLC Flag */ - up->curregs[R9] = NV; - up->curregs[R10] = NRZ; - up->curregs[R11] = TCBR | RCBR; - baud = 9600; - brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR); - up->curregs[R12] = (brg & 0xff); - up->curregs[R13] = (brg >> 8) & 0xff; - up->curregs[R14] = BRSRC | BRENAB; - up->curregs[R15] = FIFOEN; /* Use FIFO if on ESCC */ - up->curregs[R7p] = TxFIFO_LVL | RxFIFO_LVL; - if (__load_zsregs(channel, up->curregs)) { - up->flags |= SUNZILOG_FLAG_ESCC; - } - /* Only enable interrupts if an ISR handler available */ - if (up->flags & SUNZILOG_FLAG_ISR_HANDLER) - up->curregs[R9] |= MIE; - write_zsreg(channel, R9, up->curregs[R9]); - } - - spin_unlock_irqrestore(&up->port.lock, flags); - -#ifdef CONFIG_SERIO - if (up->flags & (SUNZILOG_FLAG_CONS_KEYB | - SUNZILOG_FLAG_CONS_MOUSE)) - sunzilog_register_serio(up); -#endif -} - -static int zilog_irq = -1; - -static int __devinit zs_probe(struct platform_device *op, const struct of_device_id *match) -{ - static int kbm_inst, uart_inst; - int inst; - struct uart_sunzilog_port *up; - struct zilog_layout __iomem *rp; - int keyboard_mouse = 0; - int err; - - if (of_find_property(op->dev.of_node, "keyboard", NULL)) - keyboard_mouse = 1; - - /* uarts must come before keyboards/mice */ - if (keyboard_mouse) - inst = uart_chip_count + kbm_inst; - else - inst = uart_inst; - - sunzilog_chip_regs[inst] = of_ioremap(&op->resource[0], 0, - sizeof(struct zilog_layout), - "zs"); - if (!sunzilog_chip_regs[inst]) - return -ENOMEM; - - rp = sunzilog_chip_regs[inst]; - - if (zilog_irq == -1) - zilog_irq = op->archdata.irqs[0]; - - up = &sunzilog_port_table[inst * 2]; - - /* Channel A */ - up[0].port.mapbase = op->resource[0].start + 0x00; - up[0].port.membase = (void __iomem *) &rp->channelA; - up[0].port.iotype = UPIO_MEM; - up[0].port.irq = op->archdata.irqs[0]; - up[0].port.uartclk = ZS_CLOCK; - up[0].port.fifosize = 1; - up[0].port.ops = &sunzilog_pops; - up[0].port.type = PORT_SUNZILOG; - up[0].port.flags = 0; - up[0].port.line = (inst * 2) + 0; - up[0].port.dev = &op->dev; - up[0].flags |= SUNZILOG_FLAG_IS_CHANNEL_A; - if (keyboard_mouse) - up[0].flags |= SUNZILOG_FLAG_CONS_KEYB; - sunzilog_init_hw(&up[0]); - - /* Channel B */ - up[1].port.mapbase = op->resource[0].start + 0x04; - up[1].port.membase = (void __iomem *) &rp->channelB; - up[1].port.iotype = UPIO_MEM; - up[1].port.irq = op->archdata.irqs[0]; - up[1].port.uartclk = ZS_CLOCK; - up[1].port.fifosize = 1; - up[1].port.ops = &sunzilog_pops; - up[1].port.type = PORT_SUNZILOG; - up[1].port.flags = 0; - up[1].port.line = (inst * 2) + 1; - up[1].port.dev = &op->dev; - up[1].flags |= 0; - if (keyboard_mouse) - up[1].flags |= SUNZILOG_FLAG_CONS_MOUSE; - sunzilog_init_hw(&up[1]); - - if (!keyboard_mouse) { - if (sunserial_console_match(SUNZILOG_CONSOLE(), op->dev.of_node, - &sunzilog_reg, up[0].port.line, - false)) - up->flags |= SUNZILOG_FLAG_IS_CONS; - err = uart_add_one_port(&sunzilog_reg, &up[0].port); - if (err) { - of_iounmap(&op->resource[0], - rp, sizeof(struct zilog_layout)); - return err; - } - if (sunserial_console_match(SUNZILOG_CONSOLE(), op->dev.of_node, - &sunzilog_reg, up[1].port.line, - false)) - up->flags |= SUNZILOG_FLAG_IS_CONS; - err = uart_add_one_port(&sunzilog_reg, &up[1].port); - if (err) { - uart_remove_one_port(&sunzilog_reg, &up[0].port); - of_iounmap(&op->resource[0], - rp, sizeof(struct zilog_layout)); - return err; - } - uart_inst++; - } else { - printk(KERN_INFO "%s: Keyboard at MMIO 0x%llx (irq = %d) " - "is a %s\n", - dev_name(&op->dev), - (unsigned long long) up[0].port.mapbase, - op->archdata.irqs[0], sunzilog_type(&up[0].port)); - printk(KERN_INFO "%s: Mouse at MMIO 0x%llx (irq = %d) " - "is a %s\n", - dev_name(&op->dev), - (unsigned long long) up[1].port.mapbase, - op->archdata.irqs[0], sunzilog_type(&up[1].port)); - kbm_inst++; - } - - dev_set_drvdata(&op->dev, &up[0]); - - return 0; -} - -static void __devexit zs_remove_one(struct uart_sunzilog_port *up) -{ - if (ZS_IS_KEYB(up) || ZS_IS_MOUSE(up)) { -#ifdef CONFIG_SERIO - serio_unregister_port(&up->serio); -#endif - } else - uart_remove_one_port(&sunzilog_reg, &up->port); -} - -static int __devexit zs_remove(struct platform_device *op) -{ - struct uart_sunzilog_port *up = dev_get_drvdata(&op->dev); - struct zilog_layout __iomem *regs; - - zs_remove_one(&up[0]); - zs_remove_one(&up[1]); - - regs = sunzilog_chip_regs[up[0].port.line / 2]; - of_iounmap(&op->resource[0], regs, sizeof(struct zilog_layout)); - - dev_set_drvdata(&op->dev, NULL); - - return 0; -} - -static const struct of_device_id zs_match[] = { - { - .name = "zs", - }, - {}, -}; -MODULE_DEVICE_TABLE(of, zs_match); - -static struct of_platform_driver zs_driver = { - .driver = { - .name = "zs", - .owner = THIS_MODULE, - .of_match_table = zs_match, - }, - .probe = zs_probe, - .remove = __devexit_p(zs_remove), -}; - -static int __init sunzilog_init(void) -{ - struct device_node *dp; - int err; - int num_keybms = 0; - int num_sunzilog = 0; - - for_each_node_by_name(dp, "zs") { - num_sunzilog++; - if (of_find_property(dp, "keyboard", NULL)) - num_keybms++; - } - - if (num_sunzilog) { - err = sunzilog_alloc_tables(num_sunzilog); - if (err) - goto out; - - uart_chip_count = num_sunzilog - num_keybms; - - err = sunserial_register_minors(&sunzilog_reg, - uart_chip_count * 2); - if (err) - goto out_free_tables; - } - - err = of_register_platform_driver(&zs_driver); - if (err) - goto out_unregister_uart; - - if (zilog_irq != -1) { - struct uart_sunzilog_port *up = sunzilog_irq_chain; - err = request_irq(zilog_irq, sunzilog_interrupt, IRQF_SHARED, - "zs", sunzilog_irq_chain); - if (err) - goto out_unregister_driver; - - /* Enable Interrupts */ - while (up) { - struct zilog_channel __iomem *channel; - - /* printk (KERN_INFO "Enable IRQ for ZILOG Hardware %p\n", up); */ - channel = ZILOG_CHANNEL_FROM_PORT(&up->port); - up->flags |= SUNZILOG_FLAG_ISR_HANDLER; - up->curregs[R9] |= MIE; - write_zsreg(channel, R9, up->curregs[R9]); - up = up->next; - } - } - -out: - return err; - -out_unregister_driver: - of_unregister_platform_driver(&zs_driver); - -out_unregister_uart: - if (num_sunzilog) { - sunserial_unregister_minors(&sunzilog_reg, num_sunzilog); - sunzilog_reg.cons = NULL; - } - -out_free_tables: - sunzilog_free_tables(); - goto out; -} - -static void __exit sunzilog_exit(void) -{ - of_unregister_platform_driver(&zs_driver); - - if (zilog_irq != -1) { - struct uart_sunzilog_port *up = sunzilog_irq_chain; - - /* Disable Interrupts */ - while (up) { - struct zilog_channel __iomem *channel; - - /* printk (KERN_INFO "Disable IRQ for ZILOG Hardware %p\n", up); */ - channel = ZILOG_CHANNEL_FROM_PORT(&up->port); - up->flags &= ~SUNZILOG_FLAG_ISR_HANDLER; - up->curregs[R9] &= ~MIE; - write_zsreg(channel, R9, up->curregs[R9]); - up = up->next; - } - - free_irq(zilog_irq, sunzilog_irq_chain); - zilog_irq = -1; - } - - if (sunzilog_reg.nr) { - sunserial_unregister_minors(&sunzilog_reg, sunzilog_reg.nr); - sunzilog_free_tables(); - } -} - -module_init(sunzilog_init); -module_exit(sunzilog_exit); - -MODULE_AUTHOR("David S. Miller"); -MODULE_DESCRIPTION("Sun Zilog serial port driver"); -MODULE_VERSION("2.0"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/sunzilog.h b/drivers/serial/sunzilog.h deleted file mode 100644 index 5dec7b47cc38..000000000000 --- a/drivers/serial/sunzilog.h +++ /dev/null @@ -1,289 +0,0 @@ -#ifndef _SUNZILOG_H -#define _SUNZILOG_H - -struct zilog_channel { - volatile unsigned char control; - volatile unsigned char __pad1; - volatile unsigned char data; - volatile unsigned char __pad2; -}; - -struct zilog_layout { - struct zilog_channel channelB; - struct zilog_channel channelA; -}; - -#define NUM_ZSREGS 17 -#define R7p 16 /* Written as R7 with P15 bit 0 set */ - -/* Conversion routines to/from brg time constants from/to bits - * per second. - */ -#define BRG_TO_BPS(brg, freq) ((freq) / 2 / ((brg) + 2)) -#define BPS_TO_BRG(bps, freq) ((((freq) + (bps)) / (2 * (bps))) - 2) - -/* The Zilog register set */ - -#define FLAG 0x7e - -/* Write Register 0 */ -#define R0 0 /* Register selects */ -#define R1 1 -#define R2 2 -#define R3 3 -#define R4 4 -#define R5 5 -#define R6 6 -#define R7 7 -#define R8 8 -#define R9 9 -#define R10 10 -#define R11 11 -#define R12 12 -#define R13 13 -#define R14 14 -#define R15 15 - -#define NULLCODE 0 /* Null Code */ -#define POINT_HIGH 0x8 /* Select upper half of registers */ -#define RES_EXT_INT 0x10 /* Reset Ext. Status Interrupts */ -#define SEND_ABORT 0x18 /* HDLC Abort */ -#define RES_RxINT_FC 0x20 /* Reset RxINT on First Character */ -#define RES_Tx_P 0x28 /* Reset TxINT Pending */ -#define ERR_RES 0x30 /* Error Reset */ -#define RES_H_IUS 0x38 /* Reset highest IUS */ - -#define RES_Rx_CRC 0x40 /* Reset Rx CRC Checker */ -#define RES_Tx_CRC 0x80 /* Reset Tx CRC Checker */ -#define RES_EOM_L 0xC0 /* Reset EOM latch */ - -/* Write Register 1 */ - -#define EXT_INT_ENAB 0x1 /* Ext Int Enable */ -#define TxINT_ENAB 0x2 /* Tx Int Enable */ -#define PAR_SPEC 0x4 /* Parity is special condition */ - -#define RxINT_DISAB 0 /* Rx Int Disable */ -#define RxINT_FCERR 0x8 /* Rx Int on First Character Only or Error */ -#define INT_ALL_Rx 0x10 /* Int on all Rx Characters or error */ -#define INT_ERR_Rx 0x18 /* Int on error only */ -#define RxINT_MASK 0x18 - -#define WT_RDY_RT 0x20 /* Wait/Ready on R/T */ -#define WT_FN_RDYFN 0x40 /* Wait/FN/Ready FN */ -#define WT_RDY_ENAB 0x80 /* Wait/Ready Enable */ - -/* Write Register #2 (Interrupt Vector) */ - -/* Write Register 3 */ - -#define RxENAB 0x1 /* Rx Enable */ -#define SYNC_L_INH 0x2 /* Sync Character Load Inhibit */ -#define ADD_SM 0x4 /* Address Search Mode (SDLC) */ -#define RxCRC_ENAB 0x8 /* Rx CRC Enable */ -#define ENT_HM 0x10 /* Enter Hunt Mode */ -#define AUTO_ENAB 0x20 /* Auto Enables */ -#define Rx5 0x0 /* Rx 5 Bits/Character */ -#define Rx7 0x40 /* Rx 7 Bits/Character */ -#define Rx6 0x80 /* Rx 6 Bits/Character */ -#define Rx8 0xc0 /* Rx 8 Bits/Character */ -#define RxN_MASK 0xc0 - -/* Write Register 4 */ - -#define PAR_ENAB 0x1 /* Parity Enable */ -#define PAR_EVEN 0x2 /* Parity Even/Odd* */ - -#define SYNC_ENAB 0 /* Sync Modes Enable */ -#define SB1 0x4 /* 1 stop bit/char */ -#define SB15 0x8 /* 1.5 stop bits/char */ -#define SB2 0xc /* 2 stop bits/char */ - -#define MONSYNC 0 /* 8 Bit Sync character */ -#define BISYNC 0x10 /* 16 bit sync character */ -#define SDLC 0x20 /* SDLC Mode (01111110 Sync Flag) */ -#define EXTSYNC 0x30 /* External Sync Mode */ - -#define X1CLK 0x0 /* x1 clock mode */ -#define X16CLK 0x40 /* x16 clock mode */ -#define X32CLK 0x80 /* x32 clock mode */ -#define X64CLK 0xC0 /* x64 clock mode */ -#define XCLK_MASK 0xC0 - -/* Write Register 5 */ - -#define TxCRC_ENAB 0x1 /* Tx CRC Enable */ -#define RTS 0x2 /* RTS */ -#define SDLC_CRC 0x4 /* SDLC/CRC-16 */ -#define TxENAB 0x8 /* Tx Enable */ -#define SND_BRK 0x10 /* Send Break */ -#define Tx5 0x0 /* Tx 5 bits (or less)/character */ -#define Tx7 0x20 /* Tx 7 bits/character */ -#define Tx6 0x40 /* Tx 6 bits/character */ -#define Tx8 0x60 /* Tx 8 bits/character */ -#define TxN_MASK 0x60 -#define DTR 0x80 /* DTR */ - -/* Write Register 6 (Sync bits 0-7/SDLC Address Field) */ - -/* Write Register 7 (Sync bits 8-15/SDLC 01111110) */ - -/* Write Register 7' (ESCC Only) */ -#define AUTO_TxFLAG 1 /* Automatic Tx SDLC Flag */ -#define AUTO_EOM_RST 2 /* Automatic EOM Reset */ -#define AUTOnRTS 4 /* Automatic /RTS pin deactivation */ -#define RxFIFO_LVL 8 /* Receive FIFO interrupt level */ -#define nDTRnREQ 0x10 /* /DTR/REQ timing */ -#define TxFIFO_LVL 0x20 /* Transmit FIFO interrupt level */ -#define EXT_RD_EN 0x40 /* Extended read register enable */ - -/* Write Register 8 (transmit buffer) */ - -/* Write Register 9 (Master interrupt control) */ -#define VIS 1 /* Vector Includes Status */ -#define NV 2 /* No Vector */ -#define DLC 4 /* Disable Lower Chain */ -#define MIE 8 /* Master Interrupt Enable */ -#define STATHI 0x10 /* Status high */ -#define SWIACK 0x20 /* Software Interrupt Ack (not on NMOS) */ -#define NORESET 0 /* No reset on write to R9 */ -#define CHRB 0x40 /* Reset channel B */ -#define CHRA 0x80 /* Reset channel A */ -#define FHWRES 0xc0 /* Force hardware reset */ - -/* Write Register 10 (misc control bits) */ -#define BIT6 1 /* 6 bit/8bit sync */ -#define LOOPMODE 2 /* SDLC Loop mode */ -#define ABUNDER 4 /* Abort/flag on SDLC xmit underrun */ -#define MARKIDLE 8 /* Mark/flag on idle */ -#define GAOP 0x10 /* Go active on poll */ -#define NRZ 0 /* NRZ mode */ -#define NRZI 0x20 /* NRZI mode */ -#define FM1 0x40 /* FM1 (transition = 1) */ -#define FM0 0x60 /* FM0 (transition = 0) */ -#define CRCPS 0x80 /* CRC Preset I/O */ - -/* Write Register 11 (Clock Mode control) */ -#define TRxCXT 0 /* TRxC = Xtal output */ -#define TRxCTC 1 /* TRxC = Transmit clock */ -#define TRxCBR 2 /* TRxC = BR Generator Output */ -#define TRxCDP 3 /* TRxC = DPLL output */ -#define TRxCOI 4 /* TRxC O/I */ -#define TCRTxCP 0 /* Transmit clock = RTxC pin */ -#define TCTRxCP 8 /* Transmit clock = TRxC pin */ -#define TCBR 0x10 /* Transmit clock = BR Generator output */ -#define TCDPLL 0x18 /* Transmit clock = DPLL output */ -#define RCRTxCP 0 /* Receive clock = RTxC pin */ -#define RCTRxCP 0x20 /* Receive clock = TRxC pin */ -#define RCBR 0x40 /* Receive clock = BR Generator output */ -#define RCDPLL 0x60 /* Receive clock = DPLL output */ -#define RTxCX 0x80 /* RTxC Xtal/No Xtal */ - -/* Write Register 12 (lower byte of baud rate generator time constant) */ - -/* Write Register 13 (upper byte of baud rate generator time constant) */ - -/* Write Register 14 (Misc control bits) */ -#define BRENAB 1 /* Baud rate generator enable */ -#define BRSRC 2 /* Baud rate generator source */ -#define DTRREQ 4 /* DTR/Request function */ -#define AUTOECHO 8 /* Auto Echo */ -#define LOOPBAK 0x10 /* Local loopback */ -#define SEARCH 0x20 /* Enter search mode */ -#define RMC 0x40 /* Reset missing clock */ -#define DISDPLL 0x60 /* Disable DPLL */ -#define SSBR 0x80 /* Set DPLL source = BR generator */ -#define SSRTxC 0xa0 /* Set DPLL source = RTxC */ -#define SFMM 0xc0 /* Set FM mode */ -#define SNRZI 0xe0 /* Set NRZI mode */ - -/* Write Register 15 (external/status interrupt control) */ -#define WR7pEN 1 /* WR7' Enable (ESCC only) */ -#define ZCIE 2 /* Zero count IE */ -#define FIFOEN 4 /* FIFO Enable (ESCC only) */ -#define DCDIE 8 /* DCD IE */ -#define SYNCIE 0x10 /* Sync/hunt IE */ -#define CTSIE 0x20 /* CTS IE */ -#define TxUIE 0x40 /* Tx Underrun/EOM IE */ -#define BRKIE 0x80 /* Break/Abort IE */ - - -/* Read Register 0 */ -#define Rx_CH_AV 0x1 /* Rx Character Available */ -#define ZCOUNT 0x2 /* Zero count */ -#define Tx_BUF_EMP 0x4 /* Tx Buffer empty */ -#define DCD 0x8 /* DCD */ -#define SYNC 0x10 /* Sync/hunt */ -#define CTS 0x20 /* CTS */ -#define TxEOM 0x40 /* Tx underrun */ -#define BRK_ABRT 0x80 /* Break/Abort */ - -/* Read Register 1 */ -#define ALL_SNT 0x1 /* All sent */ -/* Residue Data for 8 Rx bits/char programmed */ -#define RES3 0x8 /* 0/3 */ -#define RES4 0x4 /* 0/4 */ -#define RES5 0xc /* 0/5 */ -#define RES6 0x2 /* 0/6 */ -#define RES7 0xa /* 0/7 */ -#define RES8 0x6 /* 0/8 */ -#define RES18 0xe /* 1/8 */ -#define RES28 0x0 /* 2/8 */ -/* Special Rx Condition Interrupts */ -#define PAR_ERR 0x10 /* Parity error */ -#define Rx_OVR 0x20 /* Rx Overrun Error */ -#define CRC_ERR 0x40 /* CRC/Framing Error */ -#define END_FR 0x80 /* End of Frame (SDLC) */ - -/* Read Register 2 (channel b only) - Interrupt vector */ -#define CHB_Tx_EMPTY 0x00 -#define CHB_EXT_STAT 0x02 -#define CHB_Rx_AVAIL 0x04 -#define CHB_SPECIAL 0x06 -#define CHA_Tx_EMPTY 0x08 -#define CHA_EXT_STAT 0x0a -#define CHA_Rx_AVAIL 0x0c -#define CHA_SPECIAL 0x0e -#define STATUS_MASK 0x0e - -/* Read Register 3 (interrupt pending register) ch a only */ -#define CHBEXT 0x1 /* Channel B Ext/Stat IP */ -#define CHBTxIP 0x2 /* Channel B Tx IP */ -#define CHBRxIP 0x4 /* Channel B Rx IP */ -#define CHAEXT 0x8 /* Channel A Ext/Stat IP */ -#define CHATxIP 0x10 /* Channel A Tx IP */ -#define CHARxIP 0x20 /* Channel A Rx IP */ - -/* Read Register 6 (LSB frame byte count [Not on NMOS]) */ - -/* Read Register 7 (MSB frame byte count and FIFO status [Not on NMOS]) */ - -/* Read Register 8 (receive data register) */ - -/* Read Register 10 (misc status bits) */ -#define ONLOOP 2 /* On loop */ -#define LOOPSEND 0x10 /* Loop sending */ -#define CLK2MIS 0x40 /* Two clocks missing */ -#define CLK1MIS 0x80 /* One clock missing */ - -/* Read Register 12 (lower byte of baud rate generator constant) */ - -/* Read Register 13 (upper byte of baud rate generator constant) */ - -/* Read Register 15 (value of WR 15) */ - -/* Misc macros */ -#define ZS_CLEARERR(channel) do { sbus_writeb(ERR_RES, &channel->control); \ - udelay(5); } while(0) - -#define ZS_CLEARSTAT(channel) do { sbus_writeb(RES_EXT_INT, &channel->control); \ - udelay(5); } while(0) - -#define ZS_CLEARFIFO(channel) do { sbus_readb(&channel->data); \ - udelay(2); \ - sbus_readb(&channel->data); \ - udelay(2); \ - sbus_readb(&channel->data); \ - udelay(2); } while(0) - -#endif /* _SUNZILOG_H */ diff --git a/drivers/serial/timbuart.c b/drivers/serial/timbuart.c deleted file mode 100644 index 1f36b7eb7351..000000000000 --- a/drivers/serial/timbuart.c +++ /dev/null @@ -1,531 +0,0 @@ -/* - * timbuart.c timberdale FPGA UART driver - * Copyright (c) 2009 Intel Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -/* Supports: - * Timberdale FPGA UART - */ - -#include <linux/pci.h> -#include <linux/interrupt.h> -#include <linux/serial_core.h> -#include <linux/kernel.h> -#include <linux/platform_device.h> -#include <linux/ioport.h> -#include <linux/slab.h> - -#include "timbuart.h" - -struct timbuart_port { - struct uart_port port; - struct tasklet_struct tasklet; - int usedma; - u32 last_ier; - struct platform_device *dev; -}; - -static int baudrates[] = {9600, 19200, 38400, 57600, 115200, 230400, 460800, - 921600, 1843200, 3250000}; - -static void timbuart_mctrl_check(struct uart_port *port, u32 isr, u32 *ier); - -static irqreturn_t timbuart_handleinterrupt(int irq, void *devid); - -static void timbuart_stop_rx(struct uart_port *port) -{ - /* spin lock held by upper layer, disable all RX interrupts */ - u32 ier = ioread32(port->membase + TIMBUART_IER) & ~RXFLAGS; - iowrite32(ier, port->membase + TIMBUART_IER); -} - -static void timbuart_stop_tx(struct uart_port *port) -{ - /* spinlock held by upper layer, disable TX interrupt */ - u32 ier = ioread32(port->membase + TIMBUART_IER) & ~TXBAE; - iowrite32(ier, port->membase + TIMBUART_IER); -} - -static void timbuart_start_tx(struct uart_port *port) -{ - struct timbuart_port *uart = - container_of(port, struct timbuart_port, port); - - /* do not transfer anything here -> fire off the tasklet */ - tasklet_schedule(&uart->tasklet); -} - -static unsigned int timbuart_tx_empty(struct uart_port *port) -{ - u32 isr = ioread32(port->membase + TIMBUART_ISR); - - return (isr & TXBE) ? TIOCSER_TEMT : 0; -} - -static void timbuart_flush_buffer(struct uart_port *port) -{ - if (!timbuart_tx_empty(port)) { - u8 ctl = ioread8(port->membase + TIMBUART_CTRL) | - TIMBUART_CTRL_FLSHTX; - - iowrite8(ctl, port->membase + TIMBUART_CTRL); - iowrite32(TXBF, port->membase + TIMBUART_ISR); - } -} - -static void timbuart_rx_chars(struct uart_port *port) -{ - struct tty_struct *tty = port->state->port.tty; - - while (ioread32(port->membase + TIMBUART_ISR) & RXDP) { - u8 ch = ioread8(port->membase + TIMBUART_RXFIFO); - port->icount.rx++; - tty_insert_flip_char(tty, ch, TTY_NORMAL); - } - - spin_unlock(&port->lock); - tty_flip_buffer_push(port->state->port.tty); - spin_lock(&port->lock); - - dev_dbg(port->dev, "%s - total read %d bytes\n", - __func__, port->icount.rx); -} - -static void timbuart_tx_chars(struct uart_port *port) -{ - struct circ_buf *xmit = &port->state->xmit; - - while (!(ioread32(port->membase + TIMBUART_ISR) & TXBF) && - !uart_circ_empty(xmit)) { - iowrite8(xmit->buf[xmit->tail], - port->membase + TIMBUART_TXFIFO); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - } - - dev_dbg(port->dev, - "%s - total written %d bytes, CTL: %x, RTS: %x, baud: %x\n", - __func__, - port->icount.tx, - ioread8(port->membase + TIMBUART_CTRL), - port->mctrl & TIOCM_RTS, - ioread8(port->membase + TIMBUART_BAUDRATE)); -} - -static void timbuart_handle_tx_port(struct uart_port *port, u32 isr, u32 *ier) -{ - struct timbuart_port *uart = - container_of(port, struct timbuart_port, port); - struct circ_buf *xmit = &port->state->xmit; - - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) - return; - - if (port->x_char) - return; - - if (isr & TXFLAGS) { - timbuart_tx_chars(port); - /* clear all TX interrupts */ - iowrite32(TXFLAGS, port->membase + TIMBUART_ISR); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - } else - /* Re-enable any tx interrupt */ - *ier |= uart->last_ier & TXFLAGS; - - /* enable interrupts if there are chars in the transmit buffer, - * Or if we delivered some bytes and want the almost empty interrupt - * we wake up the upper layer later when we got the interrupt - * to give it some time to go out... - */ - if (!uart_circ_empty(xmit)) - *ier |= TXBAE; - - dev_dbg(port->dev, "%s - leaving\n", __func__); -} - -void timbuart_handle_rx_port(struct uart_port *port, u32 isr, u32 *ier) -{ - if (isr & RXFLAGS) { - /* Some RX status is set */ - if (isr & RXBF) { - u8 ctl = ioread8(port->membase + TIMBUART_CTRL) | - TIMBUART_CTRL_FLSHRX; - iowrite8(ctl, port->membase + TIMBUART_CTRL); - port->icount.overrun++; - } else if (isr & (RXDP)) - timbuart_rx_chars(port); - - /* ack all RX interrupts */ - iowrite32(RXFLAGS, port->membase + TIMBUART_ISR); - } - - /* always have the RX interrupts enabled */ - *ier |= RXBAF | RXBF | RXTT; - - dev_dbg(port->dev, "%s - leaving\n", __func__); -} - -void timbuart_tasklet(unsigned long arg) -{ - struct timbuart_port *uart = (struct timbuart_port *)arg; - u32 isr, ier = 0; - - spin_lock(&uart->port.lock); - - isr = ioread32(uart->port.membase + TIMBUART_ISR); - dev_dbg(uart->port.dev, "%s ISR: %x\n", __func__, isr); - - if (!uart->usedma) - timbuart_handle_tx_port(&uart->port, isr, &ier); - - timbuart_mctrl_check(&uart->port, isr, &ier); - - if (!uart->usedma) - timbuart_handle_rx_port(&uart->port, isr, &ier); - - iowrite32(ier, uart->port.membase + TIMBUART_IER); - - spin_unlock(&uart->port.lock); - dev_dbg(uart->port.dev, "%s leaving\n", __func__); -} - -static unsigned int timbuart_get_mctrl(struct uart_port *port) -{ - u8 cts = ioread8(port->membase + TIMBUART_CTRL); - dev_dbg(port->dev, "%s - cts %x\n", __func__, cts); - - if (cts & TIMBUART_CTRL_CTS) - return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; - else - return TIOCM_DSR | TIOCM_CAR; -} - -static void timbuart_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - dev_dbg(port->dev, "%s - %x\n", __func__, mctrl); - - if (mctrl & TIOCM_RTS) - iowrite8(TIMBUART_CTRL_RTS, port->membase + TIMBUART_CTRL); - else - iowrite8(0, port->membase + TIMBUART_CTRL); -} - -static void timbuart_mctrl_check(struct uart_port *port, u32 isr, u32 *ier) -{ - unsigned int cts; - - if (isr & CTS_DELTA) { - /* ack */ - iowrite32(CTS_DELTA, port->membase + TIMBUART_ISR); - cts = timbuart_get_mctrl(port); - uart_handle_cts_change(port, cts & TIOCM_CTS); - wake_up_interruptible(&port->state->port.delta_msr_wait); - } - - *ier |= CTS_DELTA; -} - -static void timbuart_enable_ms(struct uart_port *port) -{ - /* N/A */ -} - -static void timbuart_break_ctl(struct uart_port *port, int ctl) -{ - /* N/A */ -} - -static int timbuart_startup(struct uart_port *port) -{ - struct timbuart_port *uart = - container_of(port, struct timbuart_port, port); - - dev_dbg(port->dev, "%s\n", __func__); - - iowrite8(TIMBUART_CTRL_FLSHRX, port->membase + TIMBUART_CTRL); - iowrite32(0x1ff, port->membase + TIMBUART_ISR); - /* Enable all but TX interrupts */ - iowrite32(RXBAF | RXBF | RXTT | CTS_DELTA, - port->membase + TIMBUART_IER); - - return request_irq(port->irq, timbuart_handleinterrupt, IRQF_SHARED, - "timb-uart", uart); -} - -static void timbuart_shutdown(struct uart_port *port) -{ - struct timbuart_port *uart = - container_of(port, struct timbuart_port, port); - dev_dbg(port->dev, "%s\n", __func__); - free_irq(port->irq, uart); - iowrite32(0, port->membase + TIMBUART_IER); -} - -static int get_bindex(int baud) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(baudrates); i++) - if (baud <= baudrates[i]) - return i; - - return -1; -} - -static void timbuart_set_termios(struct uart_port *port, - struct ktermios *termios, - struct ktermios *old) -{ - unsigned int baud; - short bindex; - unsigned long flags; - - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16); - bindex = get_bindex(baud); - dev_dbg(port->dev, "%s - bindex %d\n", __func__, bindex); - - if (bindex < 0) - bindex = 0; - baud = baudrates[bindex]; - - /* The serial layer calls into this once with old = NULL when setting - up initially */ - if (old) - tty_termios_copy_hw(termios, old); - tty_termios_encode_baud_rate(termios, baud, baud); - - spin_lock_irqsave(&port->lock, flags); - iowrite8((u8)bindex, port->membase + TIMBUART_BAUDRATE); - uart_update_timeout(port, termios->c_cflag, baud); - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *timbuart_type(struct uart_port *port) -{ - return port->type == PORT_UNKNOWN ? "timbuart" : NULL; -} - -/* We do not request/release mappings of the registers here, - * currently it's done in the proble function. - */ -static void timbuart_release_port(struct uart_port *port) -{ - struct platform_device *pdev = to_platform_device(port->dev); - int size = - resource_size(platform_get_resource(pdev, IORESOURCE_MEM, 0)); - - if (port->flags & UPF_IOREMAP) { - iounmap(port->membase); - port->membase = NULL; - } - - release_mem_region(port->mapbase, size); -} - -static int timbuart_request_port(struct uart_port *port) -{ - struct platform_device *pdev = to_platform_device(port->dev); - int size = - resource_size(platform_get_resource(pdev, IORESOURCE_MEM, 0)); - - if (!request_mem_region(port->mapbase, size, "timb-uart")) - return -EBUSY; - - if (port->flags & UPF_IOREMAP) { - port->membase = ioremap(port->mapbase, size); - if (port->membase == NULL) { - release_mem_region(port->mapbase, size); - return -ENOMEM; - } - } - - return 0; -} - -static irqreturn_t timbuart_handleinterrupt(int irq, void *devid) -{ - struct timbuart_port *uart = (struct timbuart_port *)devid; - - if (ioread8(uart->port.membase + TIMBUART_IPR)) { - uart->last_ier = ioread32(uart->port.membase + TIMBUART_IER); - - /* disable interrupts, the tasklet enables them again */ - iowrite32(0, uart->port.membase + TIMBUART_IER); - - /* fire off bottom half */ - tasklet_schedule(&uart->tasklet); - - return IRQ_HANDLED; - } else - return IRQ_NONE; -} - -/* - * Configure/autoconfigure the port. - */ -static void timbuart_config_port(struct uart_port *port, int flags) -{ - if (flags & UART_CONFIG_TYPE) { - port->type = PORT_TIMBUART; - timbuart_request_port(port); - } -} - -static int timbuart_verify_port(struct uart_port *port, - struct serial_struct *ser) -{ - /* we don't want the core code to modify any port params */ - return -EINVAL; -} - -static struct uart_ops timbuart_ops = { - .tx_empty = timbuart_tx_empty, - .set_mctrl = timbuart_set_mctrl, - .get_mctrl = timbuart_get_mctrl, - .stop_tx = timbuart_stop_tx, - .start_tx = timbuart_start_tx, - .flush_buffer = timbuart_flush_buffer, - .stop_rx = timbuart_stop_rx, - .enable_ms = timbuart_enable_ms, - .break_ctl = timbuart_break_ctl, - .startup = timbuart_startup, - .shutdown = timbuart_shutdown, - .set_termios = timbuart_set_termios, - .type = timbuart_type, - .release_port = timbuart_release_port, - .request_port = timbuart_request_port, - .config_port = timbuart_config_port, - .verify_port = timbuart_verify_port -}; - -static struct uart_driver timbuart_driver = { - .owner = THIS_MODULE, - .driver_name = "timberdale_uart", - .dev_name = "ttyTU", - .major = TIMBUART_MAJOR, - .minor = TIMBUART_MINOR, - .nr = 1 -}; - -static int __devinit timbuart_probe(struct platform_device *dev) -{ - int err, irq; - struct timbuart_port *uart; - struct resource *iomem; - - dev_dbg(&dev->dev, "%s\n", __func__); - - uart = kzalloc(sizeof(*uart), GFP_KERNEL); - if (!uart) { - err = -EINVAL; - goto err_mem; - } - - uart->usedma = 0; - - uart->port.uartclk = 3250000 * 16; - uart->port.fifosize = TIMBUART_FIFO_SIZE; - uart->port.regshift = 2; - uart->port.iotype = UPIO_MEM; - uart->port.ops = &timbuart_ops; - uart->port.irq = 0; - uart->port.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP; - uart->port.line = 0; - uart->port.dev = &dev->dev; - - iomem = platform_get_resource(dev, IORESOURCE_MEM, 0); - if (!iomem) { - err = -ENOMEM; - goto err_register; - } - uart->port.mapbase = iomem->start; - uart->port.membase = NULL; - - irq = platform_get_irq(dev, 0); - if (irq < 0) { - err = -EINVAL; - goto err_register; - } - uart->port.irq = irq; - - tasklet_init(&uart->tasklet, timbuart_tasklet, (unsigned long)uart); - - err = uart_register_driver(&timbuart_driver); - if (err) - goto err_register; - - err = uart_add_one_port(&timbuart_driver, &uart->port); - if (err) - goto err_add_port; - - platform_set_drvdata(dev, uart); - - return 0; - -err_add_port: - uart_unregister_driver(&timbuart_driver); -err_register: - kfree(uart); -err_mem: - printk(KERN_ERR "timberdale: Failed to register Timberdale UART: %d\n", - err); - - return err; -} - -static int __devexit timbuart_remove(struct platform_device *dev) -{ - struct timbuart_port *uart = platform_get_drvdata(dev); - - tasklet_kill(&uart->tasklet); - uart_remove_one_port(&timbuart_driver, &uart->port); - uart_unregister_driver(&timbuart_driver); - kfree(uart); - - return 0; -} - -static struct platform_driver timbuart_platform_driver = { - .driver = { - .name = "timb-uart", - .owner = THIS_MODULE, - }, - .probe = timbuart_probe, - .remove = __devexit_p(timbuart_remove), -}; - -/*--------------------------------------------------------------------------*/ - -static int __init timbuart_init(void) -{ - return platform_driver_register(&timbuart_platform_driver); -} - -static void __exit timbuart_exit(void) -{ - platform_driver_unregister(&timbuart_platform_driver); -} - -module_init(timbuart_init); -module_exit(timbuart_exit); - -MODULE_DESCRIPTION("Timberdale UART driver"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:timb-uart"); - diff --git a/drivers/serial/timbuart.h b/drivers/serial/timbuart.h deleted file mode 100644 index 7e566766bc43..000000000000 --- a/drivers/serial/timbuart.h +++ /dev/null @@ -1,58 +0,0 @@ -/* - * timbuart.c timberdale FPGA GPIO driver - * Copyright (c) 2009 Intel Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -/* Supports: - * Timberdale FPGA UART - */ - -#ifndef _TIMBUART_H -#define _TIMBUART_H - -#define TIMBUART_FIFO_SIZE 2048 - -#define TIMBUART_RXFIFO 0x08 -#define TIMBUART_TXFIFO 0x0c -#define TIMBUART_IER 0x10 -#define TIMBUART_IPR 0x14 -#define TIMBUART_ISR 0x18 -#define TIMBUART_CTRL 0x1c -#define TIMBUART_BAUDRATE 0x20 - -#define TIMBUART_CTRL_RTS 0x01 -#define TIMBUART_CTRL_CTS 0x02 -#define TIMBUART_CTRL_FLSHTX 0x40 -#define TIMBUART_CTRL_FLSHRX 0x80 - -#define TXBF 0x01 -#define TXBAE 0x02 -#define CTS_DELTA 0x04 -#define RXDP 0x08 -#define RXBAF 0x10 -#define RXBF 0x20 -#define RXTT 0x40 -#define RXBNAE 0x80 -#define TXBE 0x100 - -#define RXFLAGS (RXDP | RXBAF | RXBF | RXTT | RXBNAE) -#define TXFLAGS (TXBF | TXBAE) - -#define TIMBUART_MAJOR 204 -#define TIMBUART_MINOR 192 - -#endif /* _TIMBUART_H */ - diff --git a/drivers/serial/uartlite.c b/drivers/serial/uartlite.c deleted file mode 100644 index d2fce865b731..000000000000 --- a/drivers/serial/uartlite.c +++ /dev/null @@ -1,709 +0,0 @@ -/* - * uartlite.c: Serial driver for Xilinx uartlite serial controller - * - * Copyright (C) 2006 Peter Korsgaard <jacmet@sunsite.dk> - * Copyright (C) 2007 Secret Lab Technologies Ltd. - * - * This file is licensed under the terms of the GNU General Public License - * version 2. This program is licensed "as is" without any warranty of any - * kind, whether express or implied. - */ - -#include <linux/platform_device.h> -#include <linux/module.h> -#include <linux/console.h> -#include <linux/serial.h> -#include <linux/serial_core.h> -#include <linux/tty.h> -#include <linux/delay.h> -#include <linux/interrupt.h> -#include <linux/init.h> -#include <asm/io.h> -#if defined(CONFIG_OF) && (defined(CONFIG_PPC32) || defined(CONFIG_MICROBLAZE)) -#include <linux/of.h> -#include <linux/of_address.h> -#include <linux/of_device.h> -#include <linux/of_platform.h> - -/* Match table for of_platform binding */ -static struct of_device_id ulite_of_match[] __devinitdata = { - { .compatible = "xlnx,opb-uartlite-1.00.b", }, - { .compatible = "xlnx,xps-uartlite-1.00.a", }, - {} -}; -MODULE_DEVICE_TABLE(of, ulite_of_match); - -#endif - -#define ULITE_NAME "ttyUL" -#define ULITE_MAJOR 204 -#define ULITE_MINOR 187 -#define ULITE_NR_UARTS 4 - -/* --------------------------------------------------------------------- - * Register definitions - * - * For register details see datasheet: - * http://www.xilinx.com/support/documentation/ip_documentation/opb_uartlite.pdf - */ - -#define ULITE_RX 0x00 -#define ULITE_TX 0x04 -#define ULITE_STATUS 0x08 -#define ULITE_CONTROL 0x0c - -#define ULITE_REGION 16 - -#define ULITE_STATUS_RXVALID 0x01 -#define ULITE_STATUS_RXFULL 0x02 -#define ULITE_STATUS_TXEMPTY 0x04 -#define ULITE_STATUS_TXFULL 0x08 -#define ULITE_STATUS_IE 0x10 -#define ULITE_STATUS_OVERRUN 0x20 -#define ULITE_STATUS_FRAME 0x40 -#define ULITE_STATUS_PARITY 0x80 - -#define ULITE_CONTROL_RST_TX 0x01 -#define ULITE_CONTROL_RST_RX 0x02 -#define ULITE_CONTROL_IE 0x10 - - -static struct uart_port ulite_ports[ULITE_NR_UARTS]; - -/* --------------------------------------------------------------------- - * Core UART driver operations - */ - -static int ulite_receive(struct uart_port *port, int stat) -{ - struct tty_struct *tty = port->state->port.tty; - unsigned char ch = 0; - char flag = TTY_NORMAL; - - if ((stat & (ULITE_STATUS_RXVALID | ULITE_STATUS_OVERRUN - | ULITE_STATUS_FRAME)) == 0) - return 0; - - /* stats */ - if (stat & ULITE_STATUS_RXVALID) { - port->icount.rx++; - ch = ioread32be(port->membase + ULITE_RX); - - if (stat & ULITE_STATUS_PARITY) - port->icount.parity++; - } - - if (stat & ULITE_STATUS_OVERRUN) - port->icount.overrun++; - - if (stat & ULITE_STATUS_FRAME) - port->icount.frame++; - - - /* drop byte with parity error if IGNPAR specificed */ - if (stat & port->ignore_status_mask & ULITE_STATUS_PARITY) - stat &= ~ULITE_STATUS_RXVALID; - - stat &= port->read_status_mask; - - if (stat & ULITE_STATUS_PARITY) - flag = TTY_PARITY; - - - stat &= ~port->ignore_status_mask; - - if (stat & ULITE_STATUS_RXVALID) - tty_insert_flip_char(tty, ch, flag); - - if (stat & ULITE_STATUS_FRAME) - tty_insert_flip_char(tty, 0, TTY_FRAME); - - if (stat & ULITE_STATUS_OVERRUN) - tty_insert_flip_char(tty, 0, TTY_OVERRUN); - - return 1; -} - -static int ulite_transmit(struct uart_port *port, int stat) -{ - struct circ_buf *xmit = &port->state->xmit; - - if (stat & ULITE_STATUS_TXFULL) - return 0; - - if (port->x_char) { - iowrite32be(port->x_char, port->membase + ULITE_TX); - port->x_char = 0; - port->icount.tx++; - return 1; - } - - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) - return 0; - - iowrite32be(xmit->buf[xmit->tail], port->membase + ULITE_TX); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE-1); - port->icount.tx++; - - /* wake up */ - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - return 1; -} - -static irqreturn_t ulite_isr(int irq, void *dev_id) -{ - struct uart_port *port = dev_id; - int busy, n = 0; - - do { - int stat = ioread32be(port->membase + ULITE_STATUS); - busy = ulite_receive(port, stat); - busy |= ulite_transmit(port, stat); - n++; - } while (busy); - - /* work done? */ - if (n > 1) { - tty_flip_buffer_push(port->state->port.tty); - return IRQ_HANDLED; - } else { - return IRQ_NONE; - } -} - -static unsigned int ulite_tx_empty(struct uart_port *port) -{ - unsigned long flags; - unsigned int ret; - - spin_lock_irqsave(&port->lock, flags); - ret = ioread32be(port->membase + ULITE_STATUS); - spin_unlock_irqrestore(&port->lock, flags); - - return ret & ULITE_STATUS_TXEMPTY ? TIOCSER_TEMT : 0; -} - -static unsigned int ulite_get_mctrl(struct uart_port *port) -{ - return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; -} - -static void ulite_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - /* N/A */ -} - -static void ulite_stop_tx(struct uart_port *port) -{ - /* N/A */ -} - -static void ulite_start_tx(struct uart_port *port) -{ - ulite_transmit(port, ioread32be(port->membase + ULITE_STATUS)); -} - -static void ulite_stop_rx(struct uart_port *port) -{ - /* don't forward any more data (like !CREAD) */ - port->ignore_status_mask = ULITE_STATUS_RXVALID | ULITE_STATUS_PARITY - | ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN; -} - -static void ulite_enable_ms(struct uart_port *port) -{ - /* N/A */ -} - -static void ulite_break_ctl(struct uart_port *port, int ctl) -{ - /* N/A */ -} - -static int ulite_startup(struct uart_port *port) -{ - int ret; - - ret = request_irq(port->irq, ulite_isr, - IRQF_SHARED | IRQF_SAMPLE_RANDOM, "uartlite", port); - if (ret) - return ret; - - iowrite32be(ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX, - port->membase + ULITE_CONTROL); - iowrite32be(ULITE_CONTROL_IE, port->membase + ULITE_CONTROL); - - return 0; -} - -static void ulite_shutdown(struct uart_port *port) -{ - iowrite32be(0, port->membase + ULITE_CONTROL); - ioread32be(port->membase + ULITE_CONTROL); /* dummy */ - free_irq(port->irq, port); -} - -static void ulite_set_termios(struct uart_port *port, struct ktermios *termios, - struct ktermios *old) -{ - unsigned long flags; - unsigned int baud; - - spin_lock_irqsave(&port->lock, flags); - - port->read_status_mask = ULITE_STATUS_RXVALID | ULITE_STATUS_OVERRUN - | ULITE_STATUS_TXFULL; - - if (termios->c_iflag & INPCK) - port->read_status_mask |= - ULITE_STATUS_PARITY | ULITE_STATUS_FRAME; - - port->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= ULITE_STATUS_PARITY - | ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN; - - /* ignore all characters if CREAD is not set */ - if ((termios->c_cflag & CREAD) == 0) - port->ignore_status_mask |= - ULITE_STATUS_RXVALID | ULITE_STATUS_PARITY - | ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN; - - /* update timeout */ - baud = uart_get_baud_rate(port, termios, old, 0, 460800); - uart_update_timeout(port, termios->c_cflag, baud); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *ulite_type(struct uart_port *port) -{ - return port->type == PORT_UARTLITE ? "uartlite" : NULL; -} - -static void ulite_release_port(struct uart_port *port) -{ - release_mem_region(port->mapbase, ULITE_REGION); - iounmap(port->membase); - port->membase = NULL; -} - -static int ulite_request_port(struct uart_port *port) -{ - pr_debug("ulite console: port=%p; port->mapbase=%llx\n", - port, (unsigned long long) port->mapbase); - - if (!request_mem_region(port->mapbase, ULITE_REGION, "uartlite")) { - dev_err(port->dev, "Memory region busy\n"); - return -EBUSY; - } - - port->membase = ioremap(port->mapbase, ULITE_REGION); - if (!port->membase) { - dev_err(port->dev, "Unable to map registers\n"); - release_mem_region(port->mapbase, ULITE_REGION); - return -EBUSY; - } - - return 0; -} - -static void ulite_config_port(struct uart_port *port, int flags) -{ - if (!ulite_request_port(port)) - port->type = PORT_UARTLITE; -} - -static int ulite_verify_port(struct uart_port *port, struct serial_struct *ser) -{ - /* we don't want the core code to modify any port params */ - return -EINVAL; -} - -#ifdef CONFIG_CONSOLE_POLL -static int ulite_get_poll_char(struct uart_port *port) -{ - if (!(ioread32be(port->membase + ULITE_STATUS) - & ULITE_STATUS_RXVALID)) - return NO_POLL_CHAR; - - return ioread32be(port->membase + ULITE_RX); -} - -static void ulite_put_poll_char(struct uart_port *port, unsigned char ch) -{ - while (ioread32be(port->membase + ULITE_STATUS) & ULITE_STATUS_TXFULL) - cpu_relax(); - - /* write char to device */ - iowrite32be(ch, port->membase + ULITE_TX); -} -#endif - -static struct uart_ops ulite_ops = { - .tx_empty = ulite_tx_empty, - .set_mctrl = ulite_set_mctrl, - .get_mctrl = ulite_get_mctrl, - .stop_tx = ulite_stop_tx, - .start_tx = ulite_start_tx, - .stop_rx = ulite_stop_rx, - .enable_ms = ulite_enable_ms, - .break_ctl = ulite_break_ctl, - .startup = ulite_startup, - .shutdown = ulite_shutdown, - .set_termios = ulite_set_termios, - .type = ulite_type, - .release_port = ulite_release_port, - .request_port = ulite_request_port, - .config_port = ulite_config_port, - .verify_port = ulite_verify_port, -#ifdef CONFIG_CONSOLE_POLL - .poll_get_char = ulite_get_poll_char, - .poll_put_char = ulite_put_poll_char, -#endif -}; - -/* --------------------------------------------------------------------- - * Console driver operations - */ - -#ifdef CONFIG_SERIAL_UARTLITE_CONSOLE -static void ulite_console_wait_tx(struct uart_port *port) -{ - int i; - u8 val; - - /* Spin waiting for TX fifo to have space available */ - for (i = 0; i < 100000; i++) { - val = ioread32be(port->membase + ULITE_STATUS); - if ((val & ULITE_STATUS_TXFULL) == 0) - break; - cpu_relax(); - } -} - -static void ulite_console_putchar(struct uart_port *port, int ch) -{ - ulite_console_wait_tx(port); - iowrite32be(ch, port->membase + ULITE_TX); -} - -static void ulite_console_write(struct console *co, const char *s, - unsigned int count) -{ - struct uart_port *port = &ulite_ports[co->index]; - unsigned long flags; - unsigned int ier; - int locked = 1; - - if (oops_in_progress) { - locked = spin_trylock_irqsave(&port->lock, flags); - } else - spin_lock_irqsave(&port->lock, flags); - - /* save and disable interrupt */ - ier = ioread32be(port->membase + ULITE_STATUS) & ULITE_STATUS_IE; - iowrite32be(0, port->membase + ULITE_CONTROL); - - uart_console_write(port, s, count, ulite_console_putchar); - - ulite_console_wait_tx(port); - - /* restore interrupt state */ - if (ier) - iowrite32be(ULITE_CONTROL_IE, port->membase + ULITE_CONTROL); - - if (locked) - spin_unlock_irqrestore(&port->lock, flags); -} - -static int __devinit ulite_console_setup(struct console *co, char *options) -{ - struct uart_port *port; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - if (co->index < 0 || co->index >= ULITE_NR_UARTS) - return -EINVAL; - - port = &ulite_ports[co->index]; - - /* Has the device been initialized yet? */ - if (!port->mapbase) { - pr_debug("console on ttyUL%i not present\n", co->index); - return -ENODEV; - } - - /* not initialized yet? */ - if (!port->membase) { - if (ulite_request_port(port)) - return -ENODEV; - } - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(port, co, baud, parity, bits, flow); -} - -static struct uart_driver ulite_uart_driver; - -static struct console ulite_console = { - .name = ULITE_NAME, - .write = ulite_console_write, - .device = uart_console_device, - .setup = ulite_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, /* Specified on the cmdline (e.g. console=ttyUL0 ) */ - .data = &ulite_uart_driver, -}; - -static int __init ulite_console_init(void) -{ - register_console(&ulite_console); - return 0; -} - -console_initcall(ulite_console_init); - -#endif /* CONFIG_SERIAL_UARTLITE_CONSOLE */ - -static struct uart_driver ulite_uart_driver = { - .owner = THIS_MODULE, - .driver_name = "uartlite", - .dev_name = ULITE_NAME, - .major = ULITE_MAJOR, - .minor = ULITE_MINOR, - .nr = ULITE_NR_UARTS, -#ifdef CONFIG_SERIAL_UARTLITE_CONSOLE - .cons = &ulite_console, -#endif -}; - -/* --------------------------------------------------------------------- - * Port assignment functions (mapping devices to uart_port structures) - */ - -/** ulite_assign: register a uartlite device with the driver - * - * @dev: pointer to device structure - * @id: requested id number. Pass -1 for automatic port assignment - * @base: base address of uartlite registers - * @irq: irq number for uartlite - * - * Returns: 0 on success, <0 otherwise - */ -static int __devinit ulite_assign(struct device *dev, int id, u32 base, int irq) -{ - struct uart_port *port; - int rc; - - /* if id = -1; then scan for a free id and use that */ - if (id < 0) { - for (id = 0; id < ULITE_NR_UARTS; id++) - if (ulite_ports[id].mapbase == 0) - break; - } - if (id < 0 || id >= ULITE_NR_UARTS) { - dev_err(dev, "%s%i too large\n", ULITE_NAME, id); - return -EINVAL; - } - - if ((ulite_ports[id].mapbase) && (ulite_ports[id].mapbase != base)) { - dev_err(dev, "cannot assign to %s%i; it is already in use\n", - ULITE_NAME, id); - return -EBUSY; - } - - port = &ulite_ports[id]; - - spin_lock_init(&port->lock); - port->fifosize = 16; - port->regshift = 2; - port->iotype = UPIO_MEM; - port->iobase = 1; /* mark port in use */ - port->mapbase = base; - port->membase = NULL; - port->ops = &ulite_ops; - port->irq = irq; - port->flags = UPF_BOOT_AUTOCONF; - port->dev = dev; - port->type = PORT_UNKNOWN; - port->line = id; - - dev_set_drvdata(dev, port); - - /* Register the port */ - rc = uart_add_one_port(&ulite_uart_driver, port); - if (rc) { - dev_err(dev, "uart_add_one_port() failed; err=%i\n", rc); - port->mapbase = 0; - dev_set_drvdata(dev, NULL); - return rc; - } - - return 0; -} - -/** ulite_release: register a uartlite device with the driver - * - * @dev: pointer to device structure - */ -static int __devexit ulite_release(struct device *dev) -{ - struct uart_port *port = dev_get_drvdata(dev); - int rc = 0; - - if (port) { - rc = uart_remove_one_port(&ulite_uart_driver, port); - dev_set_drvdata(dev, NULL); - port->mapbase = 0; - } - - return rc; -} - -/* --------------------------------------------------------------------- - * Platform bus binding - */ - -static int __devinit ulite_probe(struct platform_device *pdev) -{ - struct resource *res, *res2; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; - - res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!res2) - return -ENODEV; - - return ulite_assign(&pdev->dev, pdev->id, res->start, res2->start); -} - -static int __devexit ulite_remove(struct platform_device *pdev) -{ - return ulite_release(&pdev->dev); -} - -/* work with hotplug and coldplug */ -MODULE_ALIAS("platform:uartlite"); - -static struct platform_driver ulite_platform_driver = { - .probe = ulite_probe, - .remove = __devexit_p(ulite_remove), - .driver = { - .owner = THIS_MODULE, - .name = "uartlite", - }, -}; - -/* --------------------------------------------------------------------- - * OF bus bindings - */ -#if defined(CONFIG_OF) && (defined(CONFIG_PPC32) || defined(CONFIG_MICROBLAZE)) -static int __devinit -ulite_of_probe(struct platform_device *op, const struct of_device_id *match) -{ - struct resource res; - const unsigned int *id; - int irq, rc; - - dev_dbg(&op->dev, "%s(%p, %p)\n", __func__, op, match); - - rc = of_address_to_resource(op->dev.of_node, 0, &res); - if (rc) { - dev_err(&op->dev, "invalid address\n"); - return rc; - } - - irq = irq_of_parse_and_map(op->dev.of_node, 0); - - id = of_get_property(op->dev.of_node, "port-number", NULL); - - return ulite_assign(&op->dev, id ? *id : -1, res.start, irq); -} - -static int __devexit ulite_of_remove(struct platform_device *op) -{ - return ulite_release(&op->dev); -} - -static struct of_platform_driver ulite_of_driver = { - .probe = ulite_of_probe, - .remove = __devexit_p(ulite_of_remove), - .driver = { - .name = "uartlite", - .owner = THIS_MODULE, - .of_match_table = ulite_of_match, - }, -}; - -/* Registration helpers to keep the number of #ifdefs to a minimum */ -static inline int __init ulite_of_register(void) -{ - pr_debug("uartlite: calling of_register_platform_driver()\n"); - return of_register_platform_driver(&ulite_of_driver); -} - -static inline void __exit ulite_of_unregister(void) -{ - of_unregister_platform_driver(&ulite_of_driver); -} -#else /* CONFIG_OF && (CONFIG_PPC32 || CONFIG_MICROBLAZE) */ -/* Appropriate config not enabled; do nothing helpers */ -static inline int __init ulite_of_register(void) { return 0; } -static inline void __exit ulite_of_unregister(void) { } -#endif /* CONFIG_OF && (CONFIG_PPC32 || CONFIG_MICROBLAZE) */ - -/* --------------------------------------------------------------------- - * Module setup/teardown - */ - -int __init ulite_init(void) -{ - int ret; - - pr_debug("uartlite: calling uart_register_driver()\n"); - ret = uart_register_driver(&ulite_uart_driver); - if (ret) - goto err_uart; - - ret = ulite_of_register(); - if (ret) - goto err_of; - - pr_debug("uartlite: calling platform_driver_register()\n"); - ret = platform_driver_register(&ulite_platform_driver); - if (ret) - goto err_plat; - - return 0; - -err_plat: - ulite_of_unregister(); -err_of: - uart_unregister_driver(&ulite_uart_driver); -err_uart: - printk(KERN_ERR "registering uartlite driver failed: err=%i", ret); - return ret; -} - -void __exit ulite_exit(void) -{ - platform_driver_unregister(&ulite_platform_driver); - ulite_of_unregister(); - uart_unregister_driver(&ulite_uart_driver); -} - -module_init(ulite_init); -module_exit(ulite_exit); - -MODULE_AUTHOR("Peter Korsgaard <jacmet@sunsite.dk>"); -MODULE_DESCRIPTION("Xilinx uartlite serial driver"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/ucc_uart.c b/drivers/serial/ucc_uart.c deleted file mode 100644 index 3f4848e2174a..000000000000 --- a/drivers/serial/ucc_uart.c +++ /dev/null @@ -1,1537 +0,0 @@ -/* - * Freescale QUICC Engine UART device driver - * - * Author: Timur Tabi <timur@freescale.com> - * - * Copyright 2007 Freescale Semiconductor, Inc. This file is licensed under - * the terms of the GNU General Public License version 2. This program - * is licensed "as is" without any warranty of any kind, whether express - * or implied. - * - * This driver adds support for UART devices via Freescale's QUICC Engine - * found on some Freescale SOCs. - * - * If Soft-UART support is needed but not already present, then this driver - * will request and upload the "Soft-UART" microcode upon probe. The - * filename of the microcode should be fsl_qe_ucode_uart_X_YZ.bin, where "X" - * is the name of the SOC (e.g. 8323), and YZ is the revision of the SOC, - * (e.g. "11" for 1.1). - */ - -#include <linux/module.h> -#include <linux/serial.h> -#include <linux/slab.h> -#include <linux/serial_core.h> -#include <linux/io.h> -#include <linux/of_platform.h> -#include <linux/dma-mapping.h> - -#include <linux/fs_uart_pd.h> -#include <asm/ucc_slow.h> - -#include <linux/firmware.h> -#include <asm/reg.h> - -/* - * The GUMR flag for Soft UART. This would normally be defined in qe.h, - * but Soft-UART is a hack and we want to keep everything related to it in - * this file. - */ -#define UCC_SLOW_GUMR_H_SUART 0x00004000 /* Soft-UART */ - -/* - * soft_uart is 1 if we need to use Soft-UART mode - */ -static int soft_uart; -/* - * firmware_loaded is 1 if the firmware has been loaded, 0 otherwise. - */ -static int firmware_loaded; - -/* Enable this macro to configure all serial ports in internal loopback - mode */ -/* #define LOOPBACK */ - -/* The major and minor device numbers are defined in - * http://www.lanana.org/docs/device-list/devices-2.6+.txt. For the QE - * UART, we have major number 204 and minor numbers 46 - 49, which are the - * same as for the CPM2. This decision was made because no Freescale part - * has both a CPM and a QE. - */ -#define SERIAL_QE_MAJOR 204 -#define SERIAL_QE_MINOR 46 - -/* Since we only have minor numbers 46 - 49, there is a hard limit of 4 ports */ -#define UCC_MAX_UART 4 - -/* The number of buffer descriptors for receiving characters. */ -#define RX_NUM_FIFO 4 - -/* The number of buffer descriptors for transmitting characters. */ -#define TX_NUM_FIFO 4 - -/* The maximum size of the character buffer for a single RX BD. */ -#define RX_BUF_SIZE 32 - -/* The maximum size of the character buffer for a single TX BD. */ -#define TX_BUF_SIZE 32 - -/* - * The number of jiffies to wait after receiving a close command before the - * device is actually closed. This allows the last few characters to be - * sent over the wire. - */ -#define UCC_WAIT_CLOSING 100 - -struct ucc_uart_pram { - struct ucc_slow_pram common; - u8 res1[8]; /* reserved */ - __be16 maxidl; /* Maximum idle chars */ - __be16 idlc; /* temp idle counter */ - __be16 brkcr; /* Break count register */ - __be16 parec; /* receive parity error counter */ - __be16 frmec; /* receive framing error counter */ - __be16 nosec; /* receive noise counter */ - __be16 brkec; /* receive break condition counter */ - __be16 brkln; /* last received break length */ - __be16 uaddr[2]; /* UART address character 1 & 2 */ - __be16 rtemp; /* Temp storage */ - __be16 toseq; /* Transmit out of sequence char */ - __be16 cchars[8]; /* control characters 1-8 */ - __be16 rccm; /* receive control character mask */ - __be16 rccr; /* receive control character register */ - __be16 rlbc; /* receive last break character */ - __be16 res2; /* reserved */ - __be32 res3; /* reserved, should be cleared */ - u8 res4; /* reserved, should be cleared */ - u8 res5[3]; /* reserved, should be cleared */ - __be32 res6; /* reserved, should be cleared */ - __be32 res7; /* reserved, should be cleared */ - __be32 res8; /* reserved, should be cleared */ - __be32 res9; /* reserved, should be cleared */ - __be32 res10; /* reserved, should be cleared */ - __be32 res11; /* reserved, should be cleared */ - __be32 res12; /* reserved, should be cleared */ - __be32 res13; /* reserved, should be cleared */ -/* The rest is for Soft-UART only */ - __be16 supsmr; /* 0x90, Shadow UPSMR */ - __be16 res92; /* 0x92, reserved, initialize to 0 */ - __be32 rx_state; /* 0x94, RX state, initialize to 0 */ - __be32 rx_cnt; /* 0x98, RX count, initialize to 0 */ - u8 rx_length; /* 0x9C, Char length, set to 1+CL+PEN+1+SL */ - u8 rx_bitmark; /* 0x9D, reserved, initialize to 0 */ - u8 rx_temp_dlst_qe; /* 0x9E, reserved, initialize to 0 */ - u8 res14[0xBC - 0x9F]; /* reserved */ - __be32 dump_ptr; /* 0xBC, Dump pointer */ - __be32 rx_frame_rem; /* 0xC0, reserved, initialize to 0 */ - u8 rx_frame_rem_size; /* 0xC4, reserved, initialize to 0 */ - u8 tx_mode; /* 0xC5, mode, 0=AHDLC, 1=UART */ - __be16 tx_state; /* 0xC6, TX state */ - u8 res15[0xD0 - 0xC8]; /* reserved */ - __be32 resD0; /* 0xD0, reserved, initialize to 0 */ - u8 resD4; /* 0xD4, reserved, initialize to 0 */ - __be16 resD5; /* 0xD5, reserved, initialize to 0 */ -} __attribute__ ((packed)); - -/* SUPSMR definitions, for Soft-UART only */ -#define UCC_UART_SUPSMR_SL 0x8000 -#define UCC_UART_SUPSMR_RPM_MASK 0x6000 -#define UCC_UART_SUPSMR_RPM_ODD 0x0000 -#define UCC_UART_SUPSMR_RPM_LOW 0x2000 -#define UCC_UART_SUPSMR_RPM_EVEN 0x4000 -#define UCC_UART_SUPSMR_RPM_HIGH 0x6000 -#define UCC_UART_SUPSMR_PEN 0x1000 -#define UCC_UART_SUPSMR_TPM_MASK 0x0C00 -#define UCC_UART_SUPSMR_TPM_ODD 0x0000 -#define UCC_UART_SUPSMR_TPM_LOW 0x0400 -#define UCC_UART_SUPSMR_TPM_EVEN 0x0800 -#define UCC_UART_SUPSMR_TPM_HIGH 0x0C00 -#define UCC_UART_SUPSMR_FRZ 0x0100 -#define UCC_UART_SUPSMR_UM_MASK 0x00c0 -#define UCC_UART_SUPSMR_UM_NORMAL 0x0000 -#define UCC_UART_SUPSMR_UM_MAN_MULTI 0x0040 -#define UCC_UART_SUPSMR_UM_AUTO_MULTI 0x00c0 -#define UCC_UART_SUPSMR_CL_MASK 0x0030 -#define UCC_UART_SUPSMR_CL_8 0x0030 -#define UCC_UART_SUPSMR_CL_7 0x0020 -#define UCC_UART_SUPSMR_CL_6 0x0010 -#define UCC_UART_SUPSMR_CL_5 0x0000 - -#define UCC_UART_TX_STATE_AHDLC 0x00 -#define UCC_UART_TX_STATE_UART 0x01 -#define UCC_UART_TX_STATE_X1 0x00 -#define UCC_UART_TX_STATE_X16 0x80 - -#define UCC_UART_PRAM_ALIGNMENT 0x100 - -#define UCC_UART_SIZE_OF_BD UCC_SLOW_SIZE_OF_BD -#define NUM_CONTROL_CHARS 8 - -/* Private per-port data structure */ -struct uart_qe_port { - struct uart_port port; - struct ucc_slow __iomem *uccp; - struct ucc_uart_pram __iomem *uccup; - struct ucc_slow_info us_info; - struct ucc_slow_private *us_private; - struct device_node *np; - unsigned int ucc_num; /* First ucc is 0, not 1 */ - - u16 rx_nrfifos; - u16 rx_fifosize; - u16 tx_nrfifos; - u16 tx_fifosize; - int wait_closing; - u32 flags; - struct qe_bd *rx_bd_base; - struct qe_bd *rx_cur; - struct qe_bd *tx_bd_base; - struct qe_bd *tx_cur; - unsigned char *tx_buf; - unsigned char *rx_buf; - void *bd_virt; /* virtual address of the BD buffers */ - dma_addr_t bd_dma_addr; /* bus address of the BD buffers */ - unsigned int bd_size; /* size of BD buffer space */ -}; - -static struct uart_driver ucc_uart_driver = { - .owner = THIS_MODULE, - .driver_name = "ucc_uart", - .dev_name = "ttyQE", - .major = SERIAL_QE_MAJOR, - .minor = SERIAL_QE_MINOR, - .nr = UCC_MAX_UART, -}; - -/* - * Virtual to physical address translation. - * - * Given the virtual address for a character buffer, this function returns - * the physical (DMA) equivalent. - */ -static inline dma_addr_t cpu2qe_addr(void *addr, struct uart_qe_port *qe_port) -{ - if (likely((addr >= qe_port->bd_virt)) && - (addr < (qe_port->bd_virt + qe_port->bd_size))) - return qe_port->bd_dma_addr + (addr - qe_port->bd_virt); - - /* something nasty happened */ - printk(KERN_ERR "%s: addr=%p\n", __func__, addr); - BUG(); - return 0; -} - -/* - * Physical to virtual address translation. - * - * Given the physical (DMA) address for a character buffer, this function - * returns the virtual equivalent. - */ -static inline void *qe2cpu_addr(dma_addr_t addr, struct uart_qe_port *qe_port) -{ - /* sanity check */ - if (likely((addr >= qe_port->bd_dma_addr) && - (addr < (qe_port->bd_dma_addr + qe_port->bd_size)))) - return qe_port->bd_virt + (addr - qe_port->bd_dma_addr); - - /* something nasty happened */ - printk(KERN_ERR "%s: addr=%x\n", __func__, addr); - BUG(); - return NULL; -} - -/* - * Return 1 if the QE is done transmitting all buffers for this port - * - * This function scans each BD in sequence. If we find a BD that is not - * ready (READY=1), then we return 0 indicating that the QE is still sending - * data. If we reach the last BD (WRAP=1), then we know we've scanned - * the entire list, and all BDs are done. - */ -static unsigned int qe_uart_tx_empty(struct uart_port *port) -{ - struct uart_qe_port *qe_port = - container_of(port, struct uart_qe_port, port); - struct qe_bd *bdp = qe_port->tx_bd_base; - - while (1) { - if (in_be16(&bdp->status) & BD_SC_READY) - /* This BD is not done, so return "not done" */ - return 0; - - if (in_be16(&bdp->status) & BD_SC_WRAP) - /* - * This BD is done and it's the last one, so return - * "done" - */ - return 1; - - bdp++; - }; -} - -/* - * Set the modem control lines - * - * Although the QE can control the modem control lines (e.g. CTS), we - * don't need that support. This function must exist, however, otherwise - * the kernel will panic. - */ -void qe_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ -} - -/* - * Get the current modem control line status - * - * Although the QE can control the modem control lines (e.g. CTS), this - * driver currently doesn't support that, so we always return Carrier - * Detect, Data Set Ready, and Clear To Send. - */ -static unsigned int qe_uart_get_mctrl(struct uart_port *port) -{ - return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; -} - -/* - * Disable the transmit interrupt. - * - * Although this function is called "stop_tx", it does not actually stop - * transmission of data. Instead, it tells the QE to not generate an - * interrupt when the UCC is finished sending characters. - */ -static void qe_uart_stop_tx(struct uart_port *port) -{ - struct uart_qe_port *qe_port = - container_of(port, struct uart_qe_port, port); - - clrbits16(&qe_port->uccp->uccm, UCC_UART_UCCE_TX); -} - -/* - * Transmit as many characters to the HW as possible. - * - * This function will attempt to stuff of all the characters from the - * kernel's transmit buffer into TX BDs. - * - * A return value of non-zero indicates that it successfully stuffed all - * characters from the kernel buffer. - * - * A return value of zero indicates that there are still characters in the - * kernel's buffer that have not been transmitted, but there are no more BDs - * available. This function should be called again after a BD has been made - * available. - */ -static int qe_uart_tx_pump(struct uart_qe_port *qe_port) -{ - struct qe_bd *bdp; - unsigned char *p; - unsigned int count; - struct uart_port *port = &qe_port->port; - struct circ_buf *xmit = &port->state->xmit; - - bdp = qe_port->rx_cur; - - /* Handle xon/xoff */ - if (port->x_char) { - /* Pick next descriptor and fill from buffer */ - bdp = qe_port->tx_cur; - - p = qe2cpu_addr(bdp->buf, qe_port); - - *p++ = port->x_char; - out_be16(&bdp->length, 1); - setbits16(&bdp->status, BD_SC_READY); - /* Get next BD. */ - if (in_be16(&bdp->status) & BD_SC_WRAP) - bdp = qe_port->tx_bd_base; - else - bdp++; - qe_port->tx_cur = bdp; - - port->icount.tx++; - port->x_char = 0; - return 1; - } - - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - qe_uart_stop_tx(port); - return 0; - } - - /* Pick next descriptor and fill from buffer */ - bdp = qe_port->tx_cur; - - while (!(in_be16(&bdp->status) & BD_SC_READY) && - (xmit->tail != xmit->head)) { - count = 0; - p = qe2cpu_addr(bdp->buf, qe_port); - while (count < qe_port->tx_fifosize) { - *p++ = xmit->buf[xmit->tail]; - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - count++; - if (xmit->head == xmit->tail) - break; - } - - out_be16(&bdp->length, count); - setbits16(&bdp->status, BD_SC_READY); - - /* Get next BD. */ - if (in_be16(&bdp->status) & BD_SC_WRAP) - bdp = qe_port->tx_bd_base; - else - bdp++; - } - qe_port->tx_cur = bdp; - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (uart_circ_empty(xmit)) { - /* The kernel buffer is empty, so turn off TX interrupts. We - don't need to be told when the QE is finished transmitting - the data. */ - qe_uart_stop_tx(port); - return 0; - } - - return 1; -} - -/* - * Start transmitting data - * - * This function will start transmitting any available data, if the port - * isn't already transmitting data. - */ -static void qe_uart_start_tx(struct uart_port *port) -{ - struct uart_qe_port *qe_port = - container_of(port, struct uart_qe_port, port); - - /* If we currently are transmitting, then just return */ - if (in_be16(&qe_port->uccp->uccm) & UCC_UART_UCCE_TX) - return; - - /* Otherwise, pump the port and start transmission */ - if (qe_uart_tx_pump(qe_port)) - setbits16(&qe_port->uccp->uccm, UCC_UART_UCCE_TX); -} - -/* - * Stop transmitting data - */ -static void qe_uart_stop_rx(struct uart_port *port) -{ - struct uart_qe_port *qe_port = - container_of(port, struct uart_qe_port, port); - - clrbits16(&qe_port->uccp->uccm, UCC_UART_UCCE_RX); -} - -/* - * Enable status change interrupts - * - * We don't support status change interrupts, but we need to define this - * function otherwise the kernel will panic. - */ -static void qe_uart_enable_ms(struct uart_port *port) -{ -} - -/* Start or stop sending break signal - * - * This function controls the sending of a break signal. If break_state=1, - * then we start sending a break signal. If break_state=0, then we stop - * sending the break signal. - */ -static void qe_uart_break_ctl(struct uart_port *port, int break_state) -{ - struct uart_qe_port *qe_port = - container_of(port, struct uart_qe_port, port); - - if (break_state) - ucc_slow_stop_tx(qe_port->us_private); - else - ucc_slow_restart_tx(qe_port->us_private); -} - -/* ISR helper function for receiving character. - * - * This function is called by the ISR to handling receiving characters - */ -static void qe_uart_int_rx(struct uart_qe_port *qe_port) -{ - int i; - unsigned char ch, *cp; - struct uart_port *port = &qe_port->port; - struct tty_struct *tty = port->state->port.tty; - struct qe_bd *bdp; - u16 status; - unsigned int flg; - - /* Just loop through the closed BDs and copy the characters into - * the buffer. - */ - bdp = qe_port->rx_cur; - while (1) { - status = in_be16(&bdp->status); - - /* If this one is empty, then we assume we've read them all */ - if (status & BD_SC_EMPTY) - break; - - /* get number of characters, and check space in RX buffer */ - i = in_be16(&bdp->length); - - /* If we don't have enough room in RX buffer for the entire BD, - * then we try later, which will be the next RX interrupt. - */ - if (tty_buffer_request_room(tty, i) < i) { - dev_dbg(port->dev, "ucc-uart: no room in RX buffer\n"); - return; - } - - /* get pointer */ - cp = qe2cpu_addr(bdp->buf, qe_port); - - /* loop through the buffer */ - while (i-- > 0) { - ch = *cp++; - port->icount.rx++; - flg = TTY_NORMAL; - - if (!i && status & - (BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV)) - goto handle_error; - if (uart_handle_sysrq_char(port, ch)) - continue; - -error_return: - tty_insert_flip_char(tty, ch, flg); - - } - - /* This BD is ready to be used again. Clear status. get next */ - clrsetbits_be16(&bdp->status, BD_SC_BR | BD_SC_FR | BD_SC_PR | - BD_SC_OV | BD_SC_ID, BD_SC_EMPTY); - if (in_be16(&bdp->status) & BD_SC_WRAP) - bdp = qe_port->rx_bd_base; - else - bdp++; - - } - - /* Write back buffer pointer */ - qe_port->rx_cur = bdp; - - /* Activate BH processing */ - tty_flip_buffer_push(tty); - - return; - - /* Error processing */ - -handle_error: - /* Statistics */ - if (status & BD_SC_BR) - port->icount.brk++; - if (status & BD_SC_PR) - port->icount.parity++; - if (status & BD_SC_FR) - port->icount.frame++; - if (status & BD_SC_OV) - port->icount.overrun++; - - /* Mask out ignored conditions */ - status &= port->read_status_mask; - - /* Handle the remaining ones */ - if (status & BD_SC_BR) - flg = TTY_BREAK; - else if (status & BD_SC_PR) - flg = TTY_PARITY; - else if (status & BD_SC_FR) - flg = TTY_FRAME; - - /* Overrun does not affect the current character ! */ - if (status & BD_SC_OV) - tty_insert_flip_char(tty, 0, TTY_OVERRUN); -#ifdef SUPPORT_SYSRQ - port->sysrq = 0; -#endif - goto error_return; -} - -/* Interrupt handler - * - * This interrupt handler is called after a BD is processed. - */ -static irqreturn_t qe_uart_int(int irq, void *data) -{ - struct uart_qe_port *qe_port = (struct uart_qe_port *) data; - struct ucc_slow __iomem *uccp = qe_port->uccp; - u16 events; - - /* Clear the interrupts */ - events = in_be16(&uccp->ucce); - out_be16(&uccp->ucce, events); - - if (events & UCC_UART_UCCE_BRKE) - uart_handle_break(&qe_port->port); - - if (events & UCC_UART_UCCE_RX) - qe_uart_int_rx(qe_port); - - if (events & UCC_UART_UCCE_TX) - qe_uart_tx_pump(qe_port); - - return events ? IRQ_HANDLED : IRQ_NONE; -} - -/* Initialize buffer descriptors - * - * This function initializes all of the RX and TX buffer descriptors. - */ -static void qe_uart_initbd(struct uart_qe_port *qe_port) -{ - int i; - void *bd_virt; - struct qe_bd *bdp; - - /* Set the physical address of the host memory buffers in the buffer - * descriptors, and the virtual address for us to work with. - */ - bd_virt = qe_port->bd_virt; - bdp = qe_port->rx_bd_base; - qe_port->rx_cur = qe_port->rx_bd_base; - for (i = 0; i < (qe_port->rx_nrfifos - 1); i++) { - out_be16(&bdp->status, BD_SC_EMPTY | BD_SC_INTRPT); - out_be32(&bdp->buf, cpu2qe_addr(bd_virt, qe_port)); - out_be16(&bdp->length, 0); - bd_virt += qe_port->rx_fifosize; - bdp++; - } - - /* */ - out_be16(&bdp->status, BD_SC_WRAP | BD_SC_EMPTY | BD_SC_INTRPT); - out_be32(&bdp->buf, cpu2qe_addr(bd_virt, qe_port)); - out_be16(&bdp->length, 0); - - /* Set the physical address of the host memory - * buffers in the buffer descriptors, and the - * virtual address for us to work with. - */ - bd_virt = qe_port->bd_virt + - L1_CACHE_ALIGN(qe_port->rx_nrfifos * qe_port->rx_fifosize); - qe_port->tx_cur = qe_port->tx_bd_base; - bdp = qe_port->tx_bd_base; - for (i = 0; i < (qe_port->tx_nrfifos - 1); i++) { - out_be16(&bdp->status, BD_SC_INTRPT); - out_be32(&bdp->buf, cpu2qe_addr(bd_virt, qe_port)); - out_be16(&bdp->length, 0); - bd_virt += qe_port->tx_fifosize; - bdp++; - } - - /* Loopback requires the preamble bit to be set on the first TX BD */ -#ifdef LOOPBACK - setbits16(&qe_port->tx_cur->status, BD_SC_P); -#endif - - out_be16(&bdp->status, BD_SC_WRAP | BD_SC_INTRPT); - out_be32(&bdp->buf, cpu2qe_addr(bd_virt, qe_port)); - out_be16(&bdp->length, 0); -} - -/* - * Initialize a UCC for UART. - * - * This function configures a given UCC to be used as a UART device. Basic - * UCC initialization is handled in qe_uart_request_port(). This function - * does all the UART-specific stuff. - */ -static void qe_uart_init_ucc(struct uart_qe_port *qe_port) -{ - u32 cecr_subblock; - struct ucc_slow __iomem *uccp = qe_port->uccp; - struct ucc_uart_pram *uccup = qe_port->uccup; - - unsigned int i; - - /* First, disable TX and RX in the UCC */ - ucc_slow_disable(qe_port->us_private, COMM_DIR_RX_AND_TX); - - /* Program the UCC UART parameter RAM */ - out_8(&uccup->common.rbmr, UCC_BMR_GBL | UCC_BMR_BO_BE); - out_8(&uccup->common.tbmr, UCC_BMR_GBL | UCC_BMR_BO_BE); - out_be16(&uccup->common.mrblr, qe_port->rx_fifosize); - out_be16(&uccup->maxidl, 0x10); - out_be16(&uccup->brkcr, 1); - out_be16(&uccup->parec, 0); - out_be16(&uccup->frmec, 0); - out_be16(&uccup->nosec, 0); - out_be16(&uccup->brkec, 0); - out_be16(&uccup->uaddr[0], 0); - out_be16(&uccup->uaddr[1], 0); - out_be16(&uccup->toseq, 0); - for (i = 0; i < 8; i++) - out_be16(&uccup->cchars[i], 0xC000); - out_be16(&uccup->rccm, 0xc0ff); - - /* Configure the GUMR registers for UART */ - if (soft_uart) { - /* Soft-UART requires a 1X multiplier for TX */ - clrsetbits_be32(&uccp->gumr_l, - UCC_SLOW_GUMR_L_MODE_MASK | UCC_SLOW_GUMR_L_TDCR_MASK | - UCC_SLOW_GUMR_L_RDCR_MASK, - UCC_SLOW_GUMR_L_MODE_UART | UCC_SLOW_GUMR_L_TDCR_1 | - UCC_SLOW_GUMR_L_RDCR_16); - - clrsetbits_be32(&uccp->gumr_h, UCC_SLOW_GUMR_H_RFW, - UCC_SLOW_GUMR_H_TRX | UCC_SLOW_GUMR_H_TTX); - } else { - clrsetbits_be32(&uccp->gumr_l, - UCC_SLOW_GUMR_L_MODE_MASK | UCC_SLOW_GUMR_L_TDCR_MASK | - UCC_SLOW_GUMR_L_RDCR_MASK, - UCC_SLOW_GUMR_L_MODE_UART | UCC_SLOW_GUMR_L_TDCR_16 | - UCC_SLOW_GUMR_L_RDCR_16); - - clrsetbits_be32(&uccp->gumr_h, - UCC_SLOW_GUMR_H_TRX | UCC_SLOW_GUMR_H_TTX, - UCC_SLOW_GUMR_H_RFW); - } - -#ifdef LOOPBACK - clrsetbits_be32(&uccp->gumr_l, UCC_SLOW_GUMR_L_DIAG_MASK, - UCC_SLOW_GUMR_L_DIAG_LOOP); - clrsetbits_be32(&uccp->gumr_h, - UCC_SLOW_GUMR_H_CTSP | UCC_SLOW_GUMR_H_RSYN, - UCC_SLOW_GUMR_H_CDS); -#endif - - /* Disable rx interrupts and clear all pending events. */ - out_be16(&uccp->uccm, 0); - out_be16(&uccp->ucce, 0xffff); - out_be16(&uccp->udsr, 0x7e7e); - - /* Initialize UPSMR */ - out_be16(&uccp->upsmr, 0); - - if (soft_uart) { - out_be16(&uccup->supsmr, 0x30); - out_be16(&uccup->res92, 0); - out_be32(&uccup->rx_state, 0); - out_be32(&uccup->rx_cnt, 0); - out_8(&uccup->rx_bitmark, 0); - out_8(&uccup->rx_length, 10); - out_be32(&uccup->dump_ptr, 0x4000); - out_8(&uccup->rx_temp_dlst_qe, 0); - out_be32(&uccup->rx_frame_rem, 0); - out_8(&uccup->rx_frame_rem_size, 0); - /* Soft-UART requires TX to be 1X */ - out_8(&uccup->tx_mode, - UCC_UART_TX_STATE_UART | UCC_UART_TX_STATE_X1); - out_be16(&uccup->tx_state, 0); - out_8(&uccup->resD4, 0); - out_be16(&uccup->resD5, 0); - - /* Set UART mode. - * Enable receive and transmit. - */ - - /* From the microcode errata: - * 1.GUMR_L register, set mode=0010 (QMC). - * 2.Set GUMR_H[17] bit. (UART/AHDLC mode). - * 3.Set GUMR_H[19:20] (Transparent mode) - * 4.Clear GUMR_H[26] (RFW) - * ... - * 6.Receiver must use 16x over sampling - */ - clrsetbits_be32(&uccp->gumr_l, - UCC_SLOW_GUMR_L_MODE_MASK | UCC_SLOW_GUMR_L_TDCR_MASK | - UCC_SLOW_GUMR_L_RDCR_MASK, - UCC_SLOW_GUMR_L_MODE_QMC | UCC_SLOW_GUMR_L_TDCR_16 | - UCC_SLOW_GUMR_L_RDCR_16); - - clrsetbits_be32(&uccp->gumr_h, - UCC_SLOW_GUMR_H_RFW | UCC_SLOW_GUMR_H_RSYN, - UCC_SLOW_GUMR_H_SUART | UCC_SLOW_GUMR_H_TRX | - UCC_SLOW_GUMR_H_TTX | UCC_SLOW_GUMR_H_TFL); - -#ifdef LOOPBACK - clrsetbits_be32(&uccp->gumr_l, UCC_SLOW_GUMR_L_DIAG_MASK, - UCC_SLOW_GUMR_L_DIAG_LOOP); - clrbits32(&uccp->gumr_h, UCC_SLOW_GUMR_H_CTSP | - UCC_SLOW_GUMR_H_CDS); -#endif - - cecr_subblock = ucc_slow_get_qe_cr_subblock(qe_port->ucc_num); - qe_issue_cmd(QE_INIT_TX_RX, cecr_subblock, - QE_CR_PROTOCOL_UNSPECIFIED, 0); - } else { - cecr_subblock = ucc_slow_get_qe_cr_subblock(qe_port->ucc_num); - qe_issue_cmd(QE_INIT_TX_RX, cecr_subblock, - QE_CR_PROTOCOL_UART, 0); - } -} - -/* - * Initialize the port. - */ -static int qe_uart_startup(struct uart_port *port) -{ - struct uart_qe_port *qe_port = - container_of(port, struct uart_qe_port, port); - int ret; - - /* - * If we're using Soft-UART mode, then we need to make sure the - * firmware has been uploaded first. - */ - if (soft_uart && !firmware_loaded) { - dev_err(port->dev, "Soft-UART firmware not uploaded\n"); - return -ENODEV; - } - - qe_uart_initbd(qe_port); - qe_uart_init_ucc(qe_port); - - /* Install interrupt handler. */ - ret = request_irq(port->irq, qe_uart_int, IRQF_SHARED, "ucc-uart", - qe_port); - if (ret) { - dev_err(port->dev, "could not claim IRQ %u\n", port->irq); - return ret; - } - - /* Startup rx-int */ - setbits16(&qe_port->uccp->uccm, UCC_UART_UCCE_RX); - ucc_slow_enable(qe_port->us_private, COMM_DIR_RX_AND_TX); - - return 0; -} - -/* - * Shutdown the port. - */ -static void qe_uart_shutdown(struct uart_port *port) -{ - struct uart_qe_port *qe_port = - container_of(port, struct uart_qe_port, port); - struct ucc_slow __iomem *uccp = qe_port->uccp; - unsigned int timeout = 20; - - /* Disable RX and TX */ - - /* Wait for all the BDs marked sent */ - while (!qe_uart_tx_empty(port)) { - if (!--timeout) { - dev_warn(port->dev, "shutdown timeout\n"); - break; - } - set_current_state(TASK_UNINTERRUPTIBLE); - schedule_timeout(2); - } - - if (qe_port->wait_closing) { - /* Wait a bit longer */ - set_current_state(TASK_UNINTERRUPTIBLE); - schedule_timeout(qe_port->wait_closing); - } - - /* Stop uarts */ - ucc_slow_disable(qe_port->us_private, COMM_DIR_RX_AND_TX); - clrbits16(&uccp->uccm, UCC_UART_UCCE_TX | UCC_UART_UCCE_RX); - - /* Shut them really down and reinit buffer descriptors */ - ucc_slow_graceful_stop_tx(qe_port->us_private); - qe_uart_initbd(qe_port); - - free_irq(port->irq, qe_port); -} - -/* - * Set the serial port parameters. - */ -static void qe_uart_set_termios(struct uart_port *port, - struct ktermios *termios, struct ktermios *old) -{ - struct uart_qe_port *qe_port = - container_of(port, struct uart_qe_port, port); - struct ucc_slow __iomem *uccp = qe_port->uccp; - unsigned int baud; - unsigned long flags; - u16 upsmr = in_be16(&uccp->upsmr); - struct ucc_uart_pram __iomem *uccup = qe_port->uccup; - u16 supsmr = in_be16(&uccup->supsmr); - u8 char_length = 2; /* 1 + CL + PEN + 1 + SL */ - - /* Character length programmed into the mode register is the - * sum of: 1 start bit, number of data bits, 0 or 1 parity bit, - * 1 or 2 stop bits, minus 1. - * The value 'bits' counts this for us. - */ - - /* byte size */ - upsmr &= UCC_UART_UPSMR_CL_MASK; - supsmr &= UCC_UART_SUPSMR_CL_MASK; - - switch (termios->c_cflag & CSIZE) { - case CS5: - upsmr |= UCC_UART_UPSMR_CL_5; - supsmr |= UCC_UART_SUPSMR_CL_5; - char_length += 5; - break; - case CS6: - upsmr |= UCC_UART_UPSMR_CL_6; - supsmr |= UCC_UART_SUPSMR_CL_6; - char_length += 6; - break; - case CS7: - upsmr |= UCC_UART_UPSMR_CL_7; - supsmr |= UCC_UART_SUPSMR_CL_7; - char_length += 7; - break; - default: /* case CS8 */ - upsmr |= UCC_UART_UPSMR_CL_8; - supsmr |= UCC_UART_SUPSMR_CL_8; - char_length += 8; - break; - } - - /* If CSTOPB is set, we want two stop bits */ - if (termios->c_cflag & CSTOPB) { - upsmr |= UCC_UART_UPSMR_SL; - supsmr |= UCC_UART_SUPSMR_SL; - char_length++; /* + SL */ - } - - if (termios->c_cflag & PARENB) { - upsmr |= UCC_UART_UPSMR_PEN; - supsmr |= UCC_UART_SUPSMR_PEN; - char_length++; /* + PEN */ - - if (!(termios->c_cflag & PARODD)) { - upsmr &= ~(UCC_UART_UPSMR_RPM_MASK | - UCC_UART_UPSMR_TPM_MASK); - upsmr |= UCC_UART_UPSMR_RPM_EVEN | - UCC_UART_UPSMR_TPM_EVEN; - supsmr &= ~(UCC_UART_SUPSMR_RPM_MASK | - UCC_UART_SUPSMR_TPM_MASK); - supsmr |= UCC_UART_SUPSMR_RPM_EVEN | - UCC_UART_SUPSMR_TPM_EVEN; - } - } - - /* - * Set up parity check flag - */ - port->read_status_mask = BD_SC_EMPTY | BD_SC_OV; - if (termios->c_iflag & INPCK) - port->read_status_mask |= BD_SC_FR | BD_SC_PR; - if (termios->c_iflag & (BRKINT | PARMRK)) - port->read_status_mask |= BD_SC_BR; - - /* - * Characters to ignore - */ - port->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= BD_SC_PR | BD_SC_FR; - if (termios->c_iflag & IGNBRK) { - port->ignore_status_mask |= BD_SC_BR; - /* - * If we're ignore parity and break indicators, ignore - * overruns too. (For real raw support). - */ - if (termios->c_iflag & IGNPAR) - port->ignore_status_mask |= BD_SC_OV; - } - /* - * !!! ignore all characters if CREAD is not set - */ - if ((termios->c_cflag & CREAD) == 0) - port->read_status_mask &= ~BD_SC_EMPTY; - - baud = uart_get_baud_rate(port, termios, old, 0, 115200); - - /* Do we really need a spinlock here? */ - spin_lock_irqsave(&port->lock, flags); - - out_be16(&uccp->upsmr, upsmr); - if (soft_uart) { - out_be16(&uccup->supsmr, supsmr); - out_8(&uccup->rx_length, char_length); - - /* Soft-UART requires a 1X multiplier for TX */ - qe_setbrg(qe_port->us_info.rx_clock, baud, 16); - qe_setbrg(qe_port->us_info.tx_clock, baud, 1); - } else { - qe_setbrg(qe_port->us_info.rx_clock, baud, 16); - qe_setbrg(qe_port->us_info.tx_clock, baud, 16); - } - - spin_unlock_irqrestore(&port->lock, flags); -} - -/* - * Return a pointer to a string that describes what kind of port this is. - */ -static const char *qe_uart_type(struct uart_port *port) -{ - return "QE"; -} - -/* - * Allocate any memory and I/O resources required by the port. - */ -static int qe_uart_request_port(struct uart_port *port) -{ - int ret; - struct uart_qe_port *qe_port = - container_of(port, struct uart_qe_port, port); - struct ucc_slow_info *us_info = &qe_port->us_info; - struct ucc_slow_private *uccs; - unsigned int rx_size, tx_size; - void *bd_virt; - dma_addr_t bd_dma_addr = 0; - - ret = ucc_slow_init(us_info, &uccs); - if (ret) { - dev_err(port->dev, "could not initialize UCC%u\n", - qe_port->ucc_num); - return ret; - } - - qe_port->us_private = uccs; - qe_port->uccp = uccs->us_regs; - qe_port->uccup = (struct ucc_uart_pram *) uccs->us_pram; - qe_port->rx_bd_base = uccs->rx_bd; - qe_port->tx_bd_base = uccs->tx_bd; - - /* - * Allocate the transmit and receive data buffers. - */ - - rx_size = L1_CACHE_ALIGN(qe_port->rx_nrfifos * qe_port->rx_fifosize); - tx_size = L1_CACHE_ALIGN(qe_port->tx_nrfifos * qe_port->tx_fifosize); - - bd_virt = dma_alloc_coherent(port->dev, rx_size + tx_size, &bd_dma_addr, - GFP_KERNEL); - if (!bd_virt) { - dev_err(port->dev, "could not allocate buffer descriptors\n"); - return -ENOMEM; - } - - qe_port->bd_virt = bd_virt; - qe_port->bd_dma_addr = bd_dma_addr; - qe_port->bd_size = rx_size + tx_size; - - qe_port->rx_buf = bd_virt; - qe_port->tx_buf = qe_port->rx_buf + rx_size; - - return 0; -} - -/* - * Configure the port. - * - * We say we're a CPM-type port because that's mostly true. Once the device - * is configured, this driver operates almost identically to the CPM serial - * driver. - */ -static void qe_uart_config_port(struct uart_port *port, int flags) -{ - if (flags & UART_CONFIG_TYPE) { - port->type = PORT_CPM; - qe_uart_request_port(port); - } -} - -/* - * Release any memory and I/O resources that were allocated in - * qe_uart_request_port(). - */ -static void qe_uart_release_port(struct uart_port *port) -{ - struct uart_qe_port *qe_port = - container_of(port, struct uart_qe_port, port); - struct ucc_slow_private *uccs = qe_port->us_private; - - dma_free_coherent(port->dev, qe_port->bd_size, qe_port->bd_virt, - qe_port->bd_dma_addr); - - ucc_slow_free(uccs); -} - -/* - * Verify that the data in serial_struct is suitable for this device. - */ -static int qe_uart_verify_port(struct uart_port *port, - struct serial_struct *ser) -{ - if (ser->type != PORT_UNKNOWN && ser->type != PORT_CPM) - return -EINVAL; - - if (ser->irq < 0 || ser->irq >= nr_irqs) - return -EINVAL; - - if (ser->baud_base < 9600) - return -EINVAL; - - return 0; -} -/* UART operations - * - * Details on these functions can be found in Documentation/serial/driver - */ -static struct uart_ops qe_uart_pops = { - .tx_empty = qe_uart_tx_empty, - .set_mctrl = qe_uart_set_mctrl, - .get_mctrl = qe_uart_get_mctrl, - .stop_tx = qe_uart_stop_tx, - .start_tx = qe_uart_start_tx, - .stop_rx = qe_uart_stop_rx, - .enable_ms = qe_uart_enable_ms, - .break_ctl = qe_uart_break_ctl, - .startup = qe_uart_startup, - .shutdown = qe_uart_shutdown, - .set_termios = qe_uart_set_termios, - .type = qe_uart_type, - .release_port = qe_uart_release_port, - .request_port = qe_uart_request_port, - .config_port = qe_uart_config_port, - .verify_port = qe_uart_verify_port, -}; - -/* - * Obtain the SOC model number and revision level - * - * This function parses the device tree to obtain the SOC model. It then - * reads the SVR register to the revision. - * - * The device tree stores the SOC model two different ways. - * - * The new way is: - * - * cpu@0 { - * compatible = "PowerPC,8323"; - * device_type = "cpu"; - * ... - * - * - * The old way is: - * PowerPC,8323@0 { - * device_type = "cpu"; - * ... - * - * This code first checks the new way, and then the old way. - */ -static unsigned int soc_info(unsigned int *rev_h, unsigned int *rev_l) -{ - struct device_node *np; - const char *soc_string; - unsigned int svr; - unsigned int soc; - - /* Find the CPU node */ - np = of_find_node_by_type(NULL, "cpu"); - if (!np) - return 0; - /* Find the compatible property */ - soc_string = of_get_property(np, "compatible", NULL); - if (!soc_string) - /* No compatible property, so try the name. */ - soc_string = np->name; - - /* Extract the SOC number from the "PowerPC," string */ - if ((sscanf(soc_string, "PowerPC,%u", &soc) != 1) || !soc) - return 0; - - /* Get the revision from the SVR */ - svr = mfspr(SPRN_SVR); - *rev_h = (svr >> 4) & 0xf; - *rev_l = svr & 0xf; - - return soc; -} - -/* - * requst_firmware_nowait() callback function - * - * This function is called by the kernel when a firmware is made available, - * or if it times out waiting for the firmware. - */ -static void uart_firmware_cont(const struct firmware *fw, void *context) -{ - struct qe_firmware *firmware; - struct device *dev = context; - int ret; - - if (!fw) { - dev_err(dev, "firmware not found\n"); - return; - } - - firmware = (struct qe_firmware *) fw->data; - - if (firmware->header.length != fw->size) { - dev_err(dev, "invalid firmware\n"); - goto out; - } - - ret = qe_upload_firmware(firmware); - if (ret) { - dev_err(dev, "could not load firmware\n"); - goto out; - } - - firmware_loaded = 1; - out: - release_firmware(fw); -} - -static int ucc_uart_probe(struct platform_device *ofdev, - const struct of_device_id *match) -{ - struct device_node *np = ofdev->dev.of_node; - const unsigned int *iprop; /* Integer OF properties */ - const char *sprop; /* String OF properties */ - struct uart_qe_port *qe_port = NULL; - struct resource res; - int ret; - - /* - * Determine if we need Soft-UART mode - */ - if (of_find_property(np, "soft-uart", NULL)) { - dev_dbg(&ofdev->dev, "using Soft-UART mode\n"); - soft_uart = 1; - } - - /* - * If we are using Soft-UART, determine if we need to upload the - * firmware, too. - */ - if (soft_uart) { - struct qe_firmware_info *qe_fw_info; - - qe_fw_info = qe_get_firmware_info(); - - /* Check if the firmware has been uploaded. */ - if (qe_fw_info && strstr(qe_fw_info->id, "Soft-UART")) { - firmware_loaded = 1; - } else { - char filename[32]; - unsigned int soc; - unsigned int rev_h; - unsigned int rev_l; - - soc = soc_info(&rev_h, &rev_l); - if (!soc) { - dev_err(&ofdev->dev, "unknown CPU model\n"); - return -ENXIO; - } - sprintf(filename, "fsl_qe_ucode_uart_%u_%u%u.bin", - soc, rev_h, rev_l); - - dev_info(&ofdev->dev, "waiting for firmware %s\n", - filename); - - /* - * We call request_firmware_nowait instead of - * request_firmware so that the driver can load and - * initialize the ports without holding up the rest of - * the kernel. If hotplug support is enabled in the - * kernel, then we use it. - */ - ret = request_firmware_nowait(THIS_MODULE, - FW_ACTION_HOTPLUG, filename, &ofdev->dev, - GFP_KERNEL, &ofdev->dev, uart_firmware_cont); - if (ret) { - dev_err(&ofdev->dev, - "could not load firmware %s\n", - filename); - return ret; - } - } - } - - qe_port = kzalloc(sizeof(struct uart_qe_port), GFP_KERNEL); - if (!qe_port) { - dev_err(&ofdev->dev, "can't allocate QE port structure\n"); - return -ENOMEM; - } - - /* Search for IRQ and mapbase */ - ret = of_address_to_resource(np, 0, &res); - if (ret) { - dev_err(&ofdev->dev, "missing 'reg' property in device tree\n"); - kfree(qe_port); - return ret; - } - if (!res.start) { - dev_err(&ofdev->dev, "invalid 'reg' property in device tree\n"); - kfree(qe_port); - return -EINVAL; - } - qe_port->port.mapbase = res.start; - - /* Get the UCC number (device ID) */ - /* UCCs are numbered 1-7 */ - iprop = of_get_property(np, "cell-index", NULL); - if (!iprop) { - iprop = of_get_property(np, "device-id", NULL); - if (!iprop) { - kfree(qe_port); - dev_err(&ofdev->dev, "UCC is unspecified in " - "device tree\n"); - return -EINVAL; - } - } - - if ((*iprop < 1) || (*iprop > UCC_MAX_NUM)) { - dev_err(&ofdev->dev, "no support for UCC%u\n", *iprop); - kfree(qe_port); - return -ENODEV; - } - qe_port->ucc_num = *iprop - 1; - - /* - * In the future, we should not require the BRG to be specified in the - * device tree. If no clock-source is specified, then just pick a BRG - * to use. This requires a new QE library function that manages BRG - * assignments. - */ - - sprop = of_get_property(np, "rx-clock-name", NULL); - if (!sprop) { - dev_err(&ofdev->dev, "missing rx-clock-name in device tree\n"); - kfree(qe_port); - return -ENODEV; - } - - qe_port->us_info.rx_clock = qe_clock_source(sprop); - if ((qe_port->us_info.rx_clock < QE_BRG1) || - (qe_port->us_info.rx_clock > QE_BRG16)) { - dev_err(&ofdev->dev, "rx-clock-name must be a BRG for UART\n"); - kfree(qe_port); - return -ENODEV; - } - -#ifdef LOOPBACK - /* In internal loopback mode, TX and RX must use the same clock */ - qe_port->us_info.tx_clock = qe_port->us_info.rx_clock; -#else - sprop = of_get_property(np, "tx-clock-name", NULL); - if (!sprop) { - dev_err(&ofdev->dev, "missing tx-clock-name in device tree\n"); - kfree(qe_port); - return -ENODEV; - } - qe_port->us_info.tx_clock = qe_clock_source(sprop); -#endif - if ((qe_port->us_info.tx_clock < QE_BRG1) || - (qe_port->us_info.tx_clock > QE_BRG16)) { - dev_err(&ofdev->dev, "tx-clock-name must be a BRG for UART\n"); - kfree(qe_port); - return -ENODEV; - } - - /* Get the port number, numbered 0-3 */ - iprop = of_get_property(np, "port-number", NULL); - if (!iprop) { - dev_err(&ofdev->dev, "missing port-number in device tree\n"); - kfree(qe_port); - return -EINVAL; - } - qe_port->port.line = *iprop; - if (qe_port->port.line >= UCC_MAX_UART) { - dev_err(&ofdev->dev, "port-number must be 0-%u\n", - UCC_MAX_UART - 1); - kfree(qe_port); - return -EINVAL; - } - - qe_port->port.irq = irq_of_parse_and_map(np, 0); - if (qe_port->port.irq == NO_IRQ) { - dev_err(&ofdev->dev, "could not map IRQ for UCC%u\n", - qe_port->ucc_num + 1); - kfree(qe_port); - return -EINVAL; - } - - /* - * Newer device trees have an "fsl,qe" compatible property for the QE - * node, but we still need to support older device trees. - */ - np = of_find_compatible_node(NULL, NULL, "fsl,qe"); - if (!np) { - np = of_find_node_by_type(NULL, "qe"); - if (!np) { - dev_err(&ofdev->dev, "could not find 'qe' node\n"); - kfree(qe_port); - return -EINVAL; - } - } - - iprop = of_get_property(np, "brg-frequency", NULL); - if (!iprop) { - dev_err(&ofdev->dev, - "missing brg-frequency in device tree\n"); - kfree(qe_port); - return -EINVAL; - } - - if (*iprop) - qe_port->port.uartclk = *iprop; - else { - /* - * Older versions of U-Boot do not initialize the brg-frequency - * property, so in this case we assume the BRG frequency is - * half the QE bus frequency. - */ - iprop = of_get_property(np, "bus-frequency", NULL); - if (!iprop) { - dev_err(&ofdev->dev, - "missing QE bus-frequency in device tree\n"); - kfree(qe_port); - return -EINVAL; - } - if (*iprop) - qe_port->port.uartclk = *iprop / 2; - else { - dev_err(&ofdev->dev, - "invalid QE bus-frequency in device tree\n"); - kfree(qe_port); - return -EINVAL; - } - } - - spin_lock_init(&qe_port->port.lock); - qe_port->np = np; - qe_port->port.dev = &ofdev->dev; - qe_port->port.ops = &qe_uart_pops; - qe_port->port.iotype = UPIO_MEM; - - qe_port->tx_nrfifos = TX_NUM_FIFO; - qe_port->tx_fifosize = TX_BUF_SIZE; - qe_port->rx_nrfifos = RX_NUM_FIFO; - qe_port->rx_fifosize = RX_BUF_SIZE; - - qe_port->wait_closing = UCC_WAIT_CLOSING; - qe_port->port.fifosize = 512; - qe_port->port.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP; - - qe_port->us_info.ucc_num = qe_port->ucc_num; - qe_port->us_info.regs = (phys_addr_t) res.start; - qe_port->us_info.irq = qe_port->port.irq; - - qe_port->us_info.rx_bd_ring_len = qe_port->rx_nrfifos; - qe_port->us_info.tx_bd_ring_len = qe_port->tx_nrfifos; - - /* Make sure ucc_slow_init() initializes both TX and RX */ - qe_port->us_info.init_tx = 1; - qe_port->us_info.init_rx = 1; - - /* Add the port to the uart sub-system. This will cause - * qe_uart_config_port() to be called, so the us_info structure must - * be initialized. - */ - ret = uart_add_one_port(&ucc_uart_driver, &qe_port->port); - if (ret) { - dev_err(&ofdev->dev, "could not add /dev/ttyQE%u\n", - qe_port->port.line); - kfree(qe_port); - return ret; - } - - dev_set_drvdata(&ofdev->dev, qe_port); - - dev_info(&ofdev->dev, "UCC%u assigned to /dev/ttyQE%u\n", - qe_port->ucc_num + 1, qe_port->port.line); - - /* Display the mknod command for this device */ - dev_dbg(&ofdev->dev, "mknod command is 'mknod /dev/ttyQE%u c %u %u'\n", - qe_port->port.line, SERIAL_QE_MAJOR, - SERIAL_QE_MINOR + qe_port->port.line); - - return 0; -} - -static int ucc_uart_remove(struct platform_device *ofdev) -{ - struct uart_qe_port *qe_port = dev_get_drvdata(&ofdev->dev); - - dev_info(&ofdev->dev, "removing /dev/ttyQE%u\n", qe_port->port.line); - - uart_remove_one_port(&ucc_uart_driver, &qe_port->port); - - dev_set_drvdata(&ofdev->dev, NULL); - kfree(qe_port); - - return 0; -} - -static struct of_device_id ucc_uart_match[] = { - { - .type = "serial", - .compatible = "ucc_uart", - }, - {}, -}; -MODULE_DEVICE_TABLE(of, ucc_uart_match); - -static struct of_platform_driver ucc_uart_of_driver = { - .driver = { - .name = "ucc_uart", - .owner = THIS_MODULE, - .of_match_table = ucc_uart_match, - }, - .probe = ucc_uart_probe, - .remove = ucc_uart_remove, -}; - -static int __init ucc_uart_init(void) -{ - int ret; - - printk(KERN_INFO "Freescale QUICC Engine UART device driver\n"); -#ifdef LOOPBACK - printk(KERN_INFO "ucc-uart: Using loopback mode\n"); -#endif - - ret = uart_register_driver(&ucc_uart_driver); - if (ret) { - printk(KERN_ERR "ucc-uart: could not register UART driver\n"); - return ret; - } - - ret = of_register_platform_driver(&ucc_uart_of_driver); - if (ret) - printk(KERN_ERR - "ucc-uart: could not register platform driver\n"); - - return ret; -} - -static void __exit ucc_uart_exit(void) -{ - printk(KERN_INFO - "Freescale QUICC Engine UART device driver unloading\n"); - - of_unregister_platform_driver(&ucc_uart_of_driver); - uart_unregister_driver(&ucc_uart_driver); -} - -module_init(ucc_uart_init); -module_exit(ucc_uart_exit); - -MODULE_DESCRIPTION("Freescale QUICC Engine (QE) UART"); -MODULE_AUTHOR("Timur Tabi <timur@freescale.com>"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS_CHARDEV_MAJOR(SERIAL_QE_MAJOR); - diff --git a/drivers/serial/vr41xx_siu.c b/drivers/serial/vr41xx_siu.c deleted file mode 100644 index 3beb6ab4fa68..000000000000 --- a/drivers/serial/vr41xx_siu.c +++ /dev/null @@ -1,978 +0,0 @@ -/* - * Driver for NEC VR4100 series Serial Interface Unit. - * - * Copyright (C) 2004-2008 Yoichi Yuasa <yuasa@linux-mips.org> - * - * Based on drivers/serial/8250.c, by Russell King. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#if defined(CONFIG_SERIAL_VR41XX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/console.h> -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/serial.h> -#include <linux/serial_core.h> -#include <linux/serial_reg.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> - -#include <asm/io.h> -#include <asm/vr41xx/siu.h> -#include <asm/vr41xx/vr41xx.h> - -#define SIU_BAUD_BASE 1152000 -#define SIU_MAJOR 204 -#define SIU_MINOR_BASE 82 - -#define RX_MAX_COUNT 256 -#define TX_MAX_COUNT 15 - -#define SIUIRSEL 0x08 - #define TMICMODE 0x20 - #define TMICTX 0x10 - #define IRMSEL 0x0c - #define IRMSEL_HP 0x08 - #define IRMSEL_TEMIC 0x04 - #define IRMSEL_SHARP 0x00 - #define IRUSESEL 0x02 - #define SIRSEL 0x01 - -static struct uart_port siu_uart_ports[SIU_PORTS_MAX] = { - [0 ... SIU_PORTS_MAX-1] = { - .lock = __SPIN_LOCK_UNLOCKED(siu_uart_ports->lock), - .irq = -1, - }, -}; - -#ifdef CONFIG_SERIAL_VR41XX_CONSOLE -static uint8_t lsr_break_flag[SIU_PORTS_MAX]; -#endif - -#define siu_read(port, offset) readb((port)->membase + (offset)) -#define siu_write(port, offset, value) writeb((value), (port)->membase + (offset)) - -void vr41xx_select_siu_interface(siu_interface_t interface) -{ - struct uart_port *port; - unsigned long flags; - uint8_t irsel; - - port = &siu_uart_ports[0]; - - spin_lock_irqsave(&port->lock, flags); - - irsel = siu_read(port, SIUIRSEL); - if (interface == SIU_INTERFACE_IRDA) - irsel |= SIRSEL; - else - irsel &= ~SIRSEL; - siu_write(port, SIUIRSEL, irsel); - - spin_unlock_irqrestore(&port->lock, flags); -} -EXPORT_SYMBOL_GPL(vr41xx_select_siu_interface); - -void vr41xx_use_irda(irda_use_t use) -{ - struct uart_port *port; - unsigned long flags; - uint8_t irsel; - - port = &siu_uart_ports[0]; - - spin_lock_irqsave(&port->lock, flags); - - irsel = siu_read(port, SIUIRSEL); - if (use == FIR_USE_IRDA) - irsel |= IRUSESEL; - else - irsel &= ~IRUSESEL; - siu_write(port, SIUIRSEL, irsel); - - spin_unlock_irqrestore(&port->lock, flags); -} -EXPORT_SYMBOL_GPL(vr41xx_use_irda); - -void vr41xx_select_irda_module(irda_module_t module, irda_speed_t speed) -{ - struct uart_port *port; - unsigned long flags; - uint8_t irsel; - - port = &siu_uart_ports[0]; - - spin_lock_irqsave(&port->lock, flags); - - irsel = siu_read(port, SIUIRSEL); - irsel &= ~(IRMSEL | TMICTX | TMICMODE); - switch (module) { - case SHARP_IRDA: - irsel |= IRMSEL_SHARP; - break; - case TEMIC_IRDA: - irsel |= IRMSEL_TEMIC | TMICMODE; - if (speed == IRDA_TX_4MBPS) - irsel |= TMICTX; - break; - case HP_IRDA: - irsel |= IRMSEL_HP; - break; - default: - break; - } - siu_write(port, SIUIRSEL, irsel); - - spin_unlock_irqrestore(&port->lock, flags); -} -EXPORT_SYMBOL_GPL(vr41xx_select_irda_module); - -static inline void siu_clear_fifo(struct uart_port *port) -{ - siu_write(port, UART_FCR, UART_FCR_ENABLE_FIFO); - siu_write(port, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | - UART_FCR_CLEAR_XMIT); - siu_write(port, UART_FCR, 0); -} - -static inline unsigned long siu_port_size(struct uart_port *port) -{ - switch (port->type) { - case PORT_VR41XX_SIU: - return 11UL; - case PORT_VR41XX_DSIU: - return 8UL; - } - - return 0; -} - -static inline unsigned int siu_check_type(struct uart_port *port) -{ - if (port->line == 0) - return PORT_VR41XX_SIU; - if (port->line == 1 && port->irq != -1) - return PORT_VR41XX_DSIU; - - return PORT_UNKNOWN; -} - -static inline const char *siu_type_name(struct uart_port *port) -{ - switch (port->type) { - case PORT_VR41XX_SIU: - return "SIU"; - case PORT_VR41XX_DSIU: - return "DSIU"; - } - - return NULL; -} - -static unsigned int siu_tx_empty(struct uart_port *port) -{ - uint8_t lsr; - - lsr = siu_read(port, UART_LSR); - if (lsr & UART_LSR_TEMT) - return TIOCSER_TEMT; - - return 0; -} - -static void siu_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - uint8_t mcr = 0; - - if (mctrl & TIOCM_DTR) - mcr |= UART_MCR_DTR; - if (mctrl & TIOCM_RTS) - mcr |= UART_MCR_RTS; - if (mctrl & TIOCM_OUT1) - mcr |= UART_MCR_OUT1; - if (mctrl & TIOCM_OUT2) - mcr |= UART_MCR_OUT2; - if (mctrl & TIOCM_LOOP) - mcr |= UART_MCR_LOOP; - - siu_write(port, UART_MCR, mcr); -} - -static unsigned int siu_get_mctrl(struct uart_port *port) -{ - uint8_t msr; - unsigned int mctrl = 0; - - msr = siu_read(port, UART_MSR); - if (msr & UART_MSR_DCD) - mctrl |= TIOCM_CAR; - if (msr & UART_MSR_RI) - mctrl |= TIOCM_RNG; - if (msr & UART_MSR_DSR) - mctrl |= TIOCM_DSR; - if (msr & UART_MSR_CTS) - mctrl |= TIOCM_CTS; - - return mctrl; -} - -static void siu_stop_tx(struct uart_port *port) -{ - unsigned long flags; - uint8_t ier; - - spin_lock_irqsave(&port->lock, flags); - - ier = siu_read(port, UART_IER); - ier &= ~UART_IER_THRI; - siu_write(port, UART_IER, ier); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void siu_start_tx(struct uart_port *port) -{ - unsigned long flags; - uint8_t ier; - - spin_lock_irqsave(&port->lock, flags); - - ier = siu_read(port, UART_IER); - ier |= UART_IER_THRI; - siu_write(port, UART_IER, ier); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void siu_stop_rx(struct uart_port *port) -{ - unsigned long flags; - uint8_t ier; - - spin_lock_irqsave(&port->lock, flags); - - ier = siu_read(port, UART_IER); - ier &= ~UART_IER_RLSI; - siu_write(port, UART_IER, ier); - - port->read_status_mask &= ~UART_LSR_DR; - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void siu_enable_ms(struct uart_port *port) -{ - unsigned long flags; - uint8_t ier; - - spin_lock_irqsave(&port->lock, flags); - - ier = siu_read(port, UART_IER); - ier |= UART_IER_MSI; - siu_write(port, UART_IER, ier); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void siu_break_ctl(struct uart_port *port, int ctl) -{ - unsigned long flags; - uint8_t lcr; - - spin_lock_irqsave(&port->lock, flags); - - lcr = siu_read(port, UART_LCR); - if (ctl == -1) - lcr |= UART_LCR_SBC; - else - lcr &= ~UART_LCR_SBC; - siu_write(port, UART_LCR, lcr); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static inline void receive_chars(struct uart_port *port, uint8_t *status) -{ - struct tty_struct *tty; - uint8_t lsr, ch; - char flag; - int max_count = RX_MAX_COUNT; - - tty = port->state->port.tty; - lsr = *status; - - do { - ch = siu_read(port, UART_RX); - port->icount.rx++; - flag = TTY_NORMAL; - -#ifdef CONFIG_SERIAL_VR41XX_CONSOLE - lsr |= lsr_break_flag[port->line]; - lsr_break_flag[port->line] = 0; -#endif - if (unlikely(lsr & (UART_LSR_BI | UART_LSR_FE | - UART_LSR_PE | UART_LSR_OE))) { - if (lsr & UART_LSR_BI) { - lsr &= ~(UART_LSR_FE | UART_LSR_PE); - port->icount.brk++; - - if (uart_handle_break(port)) - goto ignore_char; - } - - if (lsr & UART_LSR_FE) - port->icount.frame++; - if (lsr & UART_LSR_PE) - port->icount.parity++; - if (lsr & UART_LSR_OE) - port->icount.overrun++; - - lsr &= port->read_status_mask; - if (lsr & UART_LSR_BI) - flag = TTY_BREAK; - if (lsr & UART_LSR_FE) - flag = TTY_FRAME; - if (lsr & UART_LSR_PE) - flag = TTY_PARITY; - } - - if (uart_handle_sysrq_char(port, ch)) - goto ignore_char; - - uart_insert_char(port, lsr, UART_LSR_OE, ch, flag); - - ignore_char: - lsr = siu_read(port, UART_LSR); - } while ((lsr & UART_LSR_DR) && (max_count-- > 0)); - - tty_flip_buffer_push(tty); - - *status = lsr; -} - -static inline void check_modem_status(struct uart_port *port) -{ - uint8_t msr; - - msr = siu_read(port, UART_MSR); - if ((msr & UART_MSR_ANY_DELTA) == 0) - return; - if (msr & UART_MSR_DDCD) - uart_handle_dcd_change(port, msr & UART_MSR_DCD); - if (msr & UART_MSR_TERI) - port->icount.rng++; - if (msr & UART_MSR_DDSR) - port->icount.dsr++; - if (msr & UART_MSR_DCTS) - uart_handle_cts_change(port, msr & UART_MSR_CTS); - - wake_up_interruptible(&port->state->port.delta_msr_wait); -} - -static inline void transmit_chars(struct uart_port *port) -{ - struct circ_buf *xmit; - int max_count = TX_MAX_COUNT; - - xmit = &port->state->xmit; - - if (port->x_char) { - siu_write(port, UART_TX, port->x_char); - port->icount.tx++; - port->x_char = 0; - return; - } - - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - siu_stop_tx(port); - return; - } - - do { - siu_write(port, UART_TX, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - if (uart_circ_empty(xmit)) - break; - } while (max_count-- > 0); - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (uart_circ_empty(xmit)) - siu_stop_tx(port); -} - -static irqreturn_t siu_interrupt(int irq, void *dev_id) -{ - struct uart_port *port; - uint8_t iir, lsr; - - port = (struct uart_port *)dev_id; - - iir = siu_read(port, UART_IIR); - if (iir & UART_IIR_NO_INT) - return IRQ_NONE; - - lsr = siu_read(port, UART_LSR); - if (lsr & UART_LSR_DR) - receive_chars(port, &lsr); - - check_modem_status(port); - - if (lsr & UART_LSR_THRE) - transmit_chars(port); - - return IRQ_HANDLED; -} - -static int siu_startup(struct uart_port *port) -{ - int retval; - - if (port->membase == NULL) - return -ENODEV; - - siu_clear_fifo(port); - - (void)siu_read(port, UART_LSR); - (void)siu_read(port, UART_RX); - (void)siu_read(port, UART_IIR); - (void)siu_read(port, UART_MSR); - - if (siu_read(port, UART_LSR) == 0xff) - return -ENODEV; - - retval = request_irq(port->irq, siu_interrupt, 0, siu_type_name(port), port); - if (retval) - return retval; - - if (port->type == PORT_VR41XX_DSIU) - vr41xx_enable_dsiuint(DSIUINT_ALL); - - siu_write(port, UART_LCR, UART_LCR_WLEN8); - - spin_lock_irq(&port->lock); - siu_set_mctrl(port, port->mctrl); - spin_unlock_irq(&port->lock); - - siu_write(port, UART_IER, UART_IER_RLSI | UART_IER_RDI); - - (void)siu_read(port, UART_LSR); - (void)siu_read(port, UART_RX); - (void)siu_read(port, UART_IIR); - (void)siu_read(port, UART_MSR); - - return 0; -} - -static void siu_shutdown(struct uart_port *port) -{ - unsigned long flags; - uint8_t lcr; - - siu_write(port, UART_IER, 0); - - spin_lock_irqsave(&port->lock, flags); - - port->mctrl &= ~TIOCM_OUT2; - siu_set_mctrl(port, port->mctrl); - - spin_unlock_irqrestore(&port->lock, flags); - - lcr = siu_read(port, UART_LCR); - lcr &= ~UART_LCR_SBC; - siu_write(port, UART_LCR, lcr); - - siu_clear_fifo(port); - - (void)siu_read(port, UART_RX); - - if (port->type == PORT_VR41XX_DSIU) - vr41xx_disable_dsiuint(DSIUINT_ALL); - - free_irq(port->irq, port); -} - -static void siu_set_termios(struct uart_port *port, struct ktermios *new, - struct ktermios *old) -{ - tcflag_t c_cflag, c_iflag; - uint8_t lcr, fcr, ier; - unsigned int baud, quot; - unsigned long flags; - - c_cflag = new->c_cflag; - switch (c_cflag & CSIZE) { - case CS5: - lcr = UART_LCR_WLEN5; - break; - case CS6: - lcr = UART_LCR_WLEN6; - break; - case CS7: - lcr = UART_LCR_WLEN7; - break; - default: - lcr = UART_LCR_WLEN8; - break; - } - - if (c_cflag & CSTOPB) - lcr |= UART_LCR_STOP; - if (c_cflag & PARENB) - lcr |= UART_LCR_PARITY; - if ((c_cflag & PARODD) != PARODD) - lcr |= UART_LCR_EPAR; - if (c_cflag & CMSPAR) - lcr |= UART_LCR_SPAR; - - baud = uart_get_baud_rate(port, new, old, 0, port->uartclk/16); - quot = uart_get_divisor(port, baud); - - fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10; - - spin_lock_irqsave(&port->lock, flags); - - uart_update_timeout(port, c_cflag, baud); - - c_iflag = new->c_iflag; - - port->read_status_mask = UART_LSR_THRE | UART_LSR_OE | UART_LSR_DR; - if (c_iflag & INPCK) - port->read_status_mask |= UART_LSR_FE | UART_LSR_PE; - if (c_iflag & (BRKINT | PARMRK)) - port->read_status_mask |= UART_LSR_BI; - - port->ignore_status_mask = 0; - if (c_iflag & IGNPAR) - port->ignore_status_mask |= UART_LSR_FE | UART_LSR_PE; - if (c_iflag & IGNBRK) { - port->ignore_status_mask |= UART_LSR_BI; - if (c_iflag & IGNPAR) - port->ignore_status_mask |= UART_LSR_OE; - } - - if ((c_cflag & CREAD) == 0) - port->ignore_status_mask |= UART_LSR_DR; - - ier = siu_read(port, UART_IER); - ier &= ~UART_IER_MSI; - if (UART_ENABLE_MS(port, c_cflag)) - ier |= UART_IER_MSI; - siu_write(port, UART_IER, ier); - - siu_write(port, UART_LCR, lcr | UART_LCR_DLAB); - - siu_write(port, UART_DLL, (uint8_t)quot); - siu_write(port, UART_DLM, (uint8_t)(quot >> 8)); - - siu_write(port, UART_LCR, lcr); - - siu_write(port, UART_FCR, fcr); - - siu_set_mctrl(port, port->mctrl); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static void siu_pm(struct uart_port *port, unsigned int state, unsigned int oldstate) -{ - switch (state) { - case 0: - switch (port->type) { - case PORT_VR41XX_SIU: - vr41xx_supply_clock(SIU_CLOCK); - break; - case PORT_VR41XX_DSIU: - vr41xx_supply_clock(DSIU_CLOCK); - break; - } - break; - case 3: - switch (port->type) { - case PORT_VR41XX_SIU: - vr41xx_mask_clock(SIU_CLOCK); - break; - case PORT_VR41XX_DSIU: - vr41xx_mask_clock(DSIU_CLOCK); - break; - } - break; - } -} - -static const char *siu_type(struct uart_port *port) -{ - return siu_type_name(port); -} - -static void siu_release_port(struct uart_port *port) -{ - unsigned long size; - - if (port->flags & UPF_IOREMAP) { - iounmap(port->membase); - port->membase = NULL; - } - - size = siu_port_size(port); - release_mem_region(port->mapbase, size); -} - -static int siu_request_port(struct uart_port *port) -{ - unsigned long size; - struct resource *res; - - size = siu_port_size(port); - res = request_mem_region(port->mapbase, size, siu_type_name(port)); - if (res == NULL) - return -EBUSY; - - if (port->flags & UPF_IOREMAP) { - port->membase = ioremap(port->mapbase, size); - if (port->membase == NULL) { - release_resource(res); - return -ENOMEM; - } - } - - return 0; -} - -static void siu_config_port(struct uart_port *port, int flags) -{ - if (flags & UART_CONFIG_TYPE) { - port->type = siu_check_type(port); - (void)siu_request_port(port); - } -} - -static int siu_verify_port(struct uart_port *port, struct serial_struct *serial) -{ - if (port->type != PORT_VR41XX_SIU && port->type != PORT_VR41XX_DSIU) - return -EINVAL; - if (port->irq != serial->irq) - return -EINVAL; - if (port->iotype != serial->io_type) - return -EINVAL; - if (port->mapbase != (unsigned long)serial->iomem_base) - return -EINVAL; - - return 0; -} - -static struct uart_ops siu_uart_ops = { - .tx_empty = siu_tx_empty, - .set_mctrl = siu_set_mctrl, - .get_mctrl = siu_get_mctrl, - .stop_tx = siu_stop_tx, - .start_tx = siu_start_tx, - .stop_rx = siu_stop_rx, - .enable_ms = siu_enable_ms, - .break_ctl = siu_break_ctl, - .startup = siu_startup, - .shutdown = siu_shutdown, - .set_termios = siu_set_termios, - .pm = siu_pm, - .type = siu_type, - .release_port = siu_release_port, - .request_port = siu_request_port, - .config_port = siu_config_port, - .verify_port = siu_verify_port, -}; - -static int siu_init_ports(struct platform_device *pdev) -{ - struct uart_port *port; - struct resource *res; - int *type = pdev->dev.platform_data; - int i; - - if (!type) - return 0; - - port = siu_uart_ports; - for (i = 0; i < SIU_PORTS_MAX; i++) { - port->type = type[i]; - if (port->type == PORT_UNKNOWN) - continue; - port->irq = platform_get_irq(pdev, i); - port->uartclk = SIU_BAUD_BASE * 16; - port->fifosize = 16; - port->regshift = 0; - port->iotype = UPIO_MEM; - port->flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF; - port->line = i; - res = platform_get_resource(pdev, IORESOURCE_MEM, i); - port->mapbase = res->start; - port++; - } - - return i; -} - -#ifdef CONFIG_SERIAL_VR41XX_CONSOLE - -#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) - -static void wait_for_xmitr(struct uart_port *port) -{ - int timeout = 10000; - uint8_t lsr, msr; - - do { - lsr = siu_read(port, UART_LSR); - if (lsr & UART_LSR_BI) - lsr_break_flag[port->line] = UART_LSR_BI; - - if ((lsr & BOTH_EMPTY) == BOTH_EMPTY) - break; - } while (timeout-- > 0); - - if (port->flags & UPF_CONS_FLOW) { - timeout = 1000000; - - do { - msr = siu_read(port, UART_MSR); - if ((msr & UART_MSR_CTS) != 0) - break; - } while (timeout-- > 0); - } -} - -static void siu_console_putchar(struct uart_port *port, int ch) -{ - wait_for_xmitr(port); - siu_write(port, UART_TX, ch); -} - -static void siu_console_write(struct console *con, const char *s, unsigned count) -{ - struct uart_port *port; - uint8_t ier; - - port = &siu_uart_ports[con->index]; - - ier = siu_read(port, UART_IER); - siu_write(port, UART_IER, 0); - - uart_console_write(port, s, count, siu_console_putchar); - - wait_for_xmitr(port); - siu_write(port, UART_IER, ier); -} - -static int __init siu_console_setup(struct console *con, char *options) -{ - struct uart_port *port; - int baud = 9600; - int parity = 'n'; - int bits = 8; - int flow = 'n'; - - if (con->index >= SIU_PORTS_MAX) - con->index = 0; - - port = &siu_uart_ports[con->index]; - if (port->membase == NULL) { - if (port->mapbase == 0) - return -ENODEV; - port->membase = ioremap(port->mapbase, siu_port_size(port)); - } - - if (port->type == PORT_VR41XX_SIU) - vr41xx_select_siu_interface(SIU_INTERFACE_RS232C); - - if (options != NULL) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(port, con, baud, parity, bits, flow); -} - -static struct uart_driver siu_uart_driver; - -static struct console siu_console = { - .name = "ttyVR", - .write = siu_console_write, - .device = uart_console_device, - .setup = siu_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &siu_uart_driver, -}; - -static int __devinit siu_console_init(void) -{ - struct uart_port *port; - int i; - - for (i = 0; i < SIU_PORTS_MAX; i++) { - port = &siu_uart_ports[i]; - port->ops = &siu_uart_ops; - } - - register_console(&siu_console); - - return 0; -} - -console_initcall(siu_console_init); - -void __init vr41xx_siu_early_setup(struct uart_port *port) -{ - if (port->type == PORT_UNKNOWN) - return; - - siu_uart_ports[port->line].line = port->line; - siu_uart_ports[port->line].type = port->type; - siu_uart_ports[port->line].uartclk = SIU_BAUD_BASE * 16; - siu_uart_ports[port->line].mapbase = port->mapbase; - siu_uart_ports[port->line].mapbase = port->mapbase; - siu_uart_ports[port->line].ops = &siu_uart_ops; -} - -#define SERIAL_VR41XX_CONSOLE &siu_console -#else -#define SERIAL_VR41XX_CONSOLE NULL -#endif - -static struct uart_driver siu_uart_driver = { - .owner = THIS_MODULE, - .driver_name = "SIU", - .dev_name = "ttyVR", - .major = SIU_MAJOR, - .minor = SIU_MINOR_BASE, - .cons = SERIAL_VR41XX_CONSOLE, -}; - -static int __devinit siu_probe(struct platform_device *dev) -{ - struct uart_port *port; - int num, i, retval; - - num = siu_init_ports(dev); - if (num <= 0) - return -ENODEV; - - siu_uart_driver.nr = num; - retval = uart_register_driver(&siu_uart_driver); - if (retval) - return retval; - - for (i = 0; i < num; i++) { - port = &siu_uart_ports[i]; - port->ops = &siu_uart_ops; - port->dev = &dev->dev; - - retval = uart_add_one_port(&siu_uart_driver, port); - if (retval < 0) { - port->dev = NULL; - break; - } - } - - if (i == 0 && retval < 0) { - uart_unregister_driver(&siu_uart_driver); - return retval; - } - - return 0; -} - -static int __devexit siu_remove(struct platform_device *dev) -{ - struct uart_port *port; - int i; - - for (i = 0; i < siu_uart_driver.nr; i++) { - port = &siu_uart_ports[i]; - if (port->dev == &dev->dev) { - uart_remove_one_port(&siu_uart_driver, port); - port->dev = NULL; - } - } - - uart_unregister_driver(&siu_uart_driver); - - return 0; -} - -static int siu_suspend(struct platform_device *dev, pm_message_t state) -{ - struct uart_port *port; - int i; - - for (i = 0; i < siu_uart_driver.nr; i++) { - port = &siu_uart_ports[i]; - if ((port->type == PORT_VR41XX_SIU || - port->type == PORT_VR41XX_DSIU) && port->dev == &dev->dev) - uart_suspend_port(&siu_uart_driver, port); - - } - - return 0; -} - -static int siu_resume(struct platform_device *dev) -{ - struct uart_port *port; - int i; - - for (i = 0; i < siu_uart_driver.nr; i++) { - port = &siu_uart_ports[i]; - if ((port->type == PORT_VR41XX_SIU || - port->type == PORT_VR41XX_DSIU) && port->dev == &dev->dev) - uart_resume_port(&siu_uart_driver, port); - } - - return 0; -} - -static struct platform_driver siu_device_driver = { - .probe = siu_probe, - .remove = __devexit_p(siu_remove), - .suspend = siu_suspend, - .resume = siu_resume, - .driver = { - .name = "SIU", - .owner = THIS_MODULE, - }, -}; - -static int __init vr41xx_siu_init(void) -{ - return platform_driver_register(&siu_device_driver); -} - -static void __exit vr41xx_siu_exit(void) -{ - platform_driver_unregister(&siu_device_driver); -} - -module_init(vr41xx_siu_init); -module_exit(vr41xx_siu_exit); - -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:SIU"); diff --git a/drivers/serial/vt8500_serial.c b/drivers/serial/vt8500_serial.c deleted file mode 100644 index 322bf56c0d89..000000000000 --- a/drivers/serial/vt8500_serial.c +++ /dev/null @@ -1,648 +0,0 @@ -/* - * drivers/serial/vt8500_serial.c - * - * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com> - * - * Based on msm_serial.c, which is: - * Copyright (C) 2007 Google, Inc. - * Author: Robert Love <rlove@google.com> - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#if defined(CONFIG_SERIAL_VT8500_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -# define SUPPORT_SYSRQ -#endif - -#include <linux/hrtimer.h> -#include <linux/delay.h> -#include <linux/module.h> -#include <linux/io.h> -#include <linux/ioport.h> -#include <linux/irq.h> -#include <linux/init.h> -#include <linux/console.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial_core.h> -#include <linux/serial.h> -#include <linux/slab.h> -#include <linux/clk.h> -#include <linux/platform_device.h> - -/* - * UART Register offsets - */ - -#define VT8500_URTDR 0x0000 /* Transmit data */ -#define VT8500_URRDR 0x0004 /* Receive data */ -#define VT8500_URDIV 0x0008 /* Clock/Baud rate divisor */ -#define VT8500_URLCR 0x000C /* Line control */ -#define VT8500_URICR 0x0010 /* IrDA control */ -#define VT8500_URIER 0x0014 /* Interrupt enable */ -#define VT8500_URISR 0x0018 /* Interrupt status */ -#define VT8500_URUSR 0x001c /* UART status */ -#define VT8500_URFCR 0x0020 /* FIFO control */ -#define VT8500_URFIDX 0x0024 /* FIFO index */ -#define VT8500_URBKR 0x0028 /* Break signal count */ -#define VT8500_URTOD 0x002c /* Time out divisor */ -#define VT8500_TXFIFO 0x1000 /* Transmit FIFO (16x8) */ -#define VT8500_RXFIFO 0x1020 /* Receive FIFO (16x10) */ - -/* - * Interrupt enable and status bits - */ - -#define TXDE (1 << 0) /* Tx Data empty */ -#define RXDF (1 << 1) /* Rx Data full */ -#define TXFAE (1 << 2) /* Tx FIFO almost empty */ -#define TXFE (1 << 3) /* Tx FIFO empty */ -#define RXFAF (1 << 4) /* Rx FIFO almost full */ -#define RXFF (1 << 5) /* Rx FIFO full */ -#define TXUDR (1 << 6) /* Tx underrun */ -#define RXOVER (1 << 7) /* Rx overrun */ -#define PER (1 << 8) /* Parity error */ -#define FER (1 << 9) /* Frame error */ -#define TCTS (1 << 10) /* Toggle of CTS */ -#define RXTOUT (1 << 11) /* Rx timeout */ -#define BKDONE (1 << 12) /* Break signal done */ -#define ERR (1 << 13) /* AHB error response */ - -#define RX_FIFO_INTS (RXFAF | RXFF | RXOVER | PER | FER | RXTOUT) -#define TX_FIFO_INTS (TXFAE | TXFE | TXUDR) - -struct vt8500_port { - struct uart_port uart; - char name[16]; - struct clk *clk; - unsigned int ier; -}; - -static inline void vt8500_write(struct uart_port *port, unsigned int val, - unsigned int off) -{ - writel(val, port->membase + off); -} - -static inline unsigned int vt8500_read(struct uart_port *port, unsigned int off) -{ - return readl(port->membase + off); -} - -static void vt8500_stop_tx(struct uart_port *port) -{ - struct vt8500_port *vt8500_port = container_of(port, - struct vt8500_port, - uart); - - vt8500_port->ier &= ~TX_FIFO_INTS; - vt8500_write(port, vt8500_port->ier, VT8500_URIER); -} - -static void vt8500_stop_rx(struct uart_port *port) -{ - struct vt8500_port *vt8500_port = container_of(port, - struct vt8500_port, - uart); - - vt8500_port->ier &= ~RX_FIFO_INTS; - vt8500_write(port, vt8500_port->ier, VT8500_URIER); -} - -static void vt8500_enable_ms(struct uart_port *port) -{ - struct vt8500_port *vt8500_port = container_of(port, - struct vt8500_port, - uart); - - vt8500_port->ier |= TCTS; - vt8500_write(port, vt8500_port->ier, VT8500_URIER); -} - -static void handle_rx(struct uart_port *port) -{ - struct tty_struct *tty = tty_port_tty_get(&port->state->port); - if (!tty) { - /* Discard data: no tty available */ - int count = (vt8500_read(port, VT8500_URFIDX) & 0x1f00) >> 8; - u16 ch; - while (count--) - ch = readw(port->membase + VT8500_RXFIFO); - return; - } - - /* - * Handle overrun - */ - if ((vt8500_read(port, VT8500_URISR) & RXOVER)) { - port->icount.overrun++; - tty_insert_flip_char(tty, 0, TTY_OVERRUN); - } - - /* and now the main RX loop */ - while (vt8500_read(port, VT8500_URFIDX) & 0x1f00) { - unsigned int c; - char flag = TTY_NORMAL; - - c = readw(port->membase + VT8500_RXFIFO) & 0x3ff; - - /* Mask conditions we're ignorning. */ - c &= ~port->read_status_mask; - - if (c & FER) { - port->icount.frame++; - flag = TTY_FRAME; - } else if (c & PER) { - port->icount.parity++; - flag = TTY_PARITY; - } - port->icount.rx++; - - if (!uart_handle_sysrq_char(port, c)) - tty_insert_flip_char(tty, c, flag); - } - - tty_flip_buffer_push(tty); - tty_kref_put(tty); -} - -static void handle_tx(struct uart_port *port) -{ - struct circ_buf *xmit = &port->state->xmit; - - if (port->x_char) { - writeb(port->x_char, port->membase + VT8500_TXFIFO); - port->icount.tx++; - port->x_char = 0; - } - if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { - vt8500_stop_tx(port); - return; - } - - while ((vt8500_read(port, VT8500_URFIDX) & 0x1f) < 16) { - if (uart_circ_empty(xmit)) - break; - - writeb(xmit->buf[xmit->tail], port->membase + VT8500_TXFIFO); - - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - port->icount.tx++; - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - - if (uart_circ_empty(xmit)) - vt8500_stop_tx(port); -} - -static void vt8500_start_tx(struct uart_port *port) -{ - struct vt8500_port *vt8500_port = container_of(port, - struct vt8500_port, - uart); - - vt8500_port->ier &= ~TX_FIFO_INTS; - vt8500_write(port, vt8500_port->ier, VT8500_URIER); - handle_tx(port); - vt8500_port->ier |= TX_FIFO_INTS; - vt8500_write(port, vt8500_port->ier, VT8500_URIER); -} - -static void handle_delta_cts(struct uart_port *port) -{ - port->icount.cts++; - wake_up_interruptible(&port->state->port.delta_msr_wait); -} - -static irqreturn_t vt8500_irq(int irq, void *dev_id) -{ - struct uart_port *port = dev_id; - unsigned long isr; - - spin_lock(&port->lock); - isr = vt8500_read(port, VT8500_URISR); - - /* Acknowledge active status bits */ - vt8500_write(port, isr, VT8500_URISR); - - if (isr & RX_FIFO_INTS) - handle_rx(port); - if (isr & TX_FIFO_INTS) - handle_tx(port); - if (isr & TCTS) - handle_delta_cts(port); - - spin_unlock(&port->lock); - - return IRQ_HANDLED; -} - -static unsigned int vt8500_tx_empty(struct uart_port *port) -{ - return (vt8500_read(port, VT8500_URFIDX) & 0x1f) < 16 ? - TIOCSER_TEMT : 0; -} - -static unsigned int vt8500_get_mctrl(struct uart_port *port) -{ - unsigned int usr; - - usr = vt8500_read(port, VT8500_URUSR); - if (usr & (1 << 4)) - return TIOCM_CTS; - else - return 0; -} - -static void vt8500_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ -} - -static void vt8500_break_ctl(struct uart_port *port, int break_ctl) -{ - if (break_ctl) - vt8500_write(port, vt8500_read(port, VT8500_URLCR) | (1 << 9), - VT8500_URLCR); -} - -static int vt8500_set_baud_rate(struct uart_port *port, unsigned int baud) -{ - unsigned long div; - unsigned int loops = 1000; - - div = vt8500_read(port, VT8500_URDIV) & ~(0x3ff); - - if (unlikely((baud < 900) || (baud > 921600))) - div |= 7; - else - div |= (921600 / baud) - 1; - - while ((vt8500_read(port, VT8500_URUSR) & (1 << 5)) && --loops) - cpu_relax(); - vt8500_write(port, div, VT8500_URDIV); - - return baud; -} - -static int vt8500_startup(struct uart_port *port) -{ - struct vt8500_port *vt8500_port = - container_of(port, struct vt8500_port, uart); - int ret; - - snprintf(vt8500_port->name, sizeof(vt8500_port->name), - "vt8500_serial%d", port->line); - - ret = request_irq(port->irq, vt8500_irq, IRQF_TRIGGER_HIGH, - vt8500_port->name, port); - if (unlikely(ret)) - return ret; - - vt8500_write(port, 0x03, VT8500_URLCR); /* enable TX & RX */ - - return 0; -} - -static void vt8500_shutdown(struct uart_port *port) -{ - struct vt8500_port *vt8500_port = - container_of(port, struct vt8500_port, uart); - - vt8500_port->ier = 0; - - /* disable interrupts and FIFOs */ - vt8500_write(&vt8500_port->uart, 0, VT8500_URIER); - vt8500_write(&vt8500_port->uart, 0x880, VT8500_URFCR); - free_irq(port->irq, port); -} - -static void vt8500_set_termios(struct uart_port *port, - struct ktermios *termios, - struct ktermios *old) -{ - struct vt8500_port *vt8500_port = - container_of(port, struct vt8500_port, uart); - unsigned long flags; - unsigned int baud, lcr; - unsigned int loops = 1000; - - spin_lock_irqsave(&port->lock, flags); - - /* calculate and set baud rate */ - baud = uart_get_baud_rate(port, termios, old, 900, 921600); - baud = vt8500_set_baud_rate(port, baud); - if (tty_termios_baud_rate(termios)) - tty_termios_encode_baud_rate(termios, baud, baud); - - /* calculate parity */ - lcr = vt8500_read(&vt8500_port->uart, VT8500_URLCR); - lcr &= ~((1 << 5) | (1 << 4)); - if (termios->c_cflag & PARENB) { - lcr |= (1 << 4); - termios->c_cflag &= ~CMSPAR; - if (termios->c_cflag & PARODD) - lcr |= (1 << 5); - } - - /* calculate bits per char */ - lcr &= ~(1 << 2); - switch (termios->c_cflag & CSIZE) { - case CS7: - break; - case CS8: - default: - lcr |= (1 << 2); - termios->c_cflag &= ~CSIZE; - termios->c_cflag |= CS8; - break; - } - - /* calculate stop bits */ - lcr &= ~(1 << 3); - if (termios->c_cflag & CSTOPB) - lcr |= (1 << 3); - - /* set parity, bits per char, and stop bit */ - vt8500_write(&vt8500_port->uart, lcr, VT8500_URLCR); - - /* Configure status bits to ignore based on termio flags. */ - port->read_status_mask = 0; - if (termios->c_iflag & IGNPAR) - port->read_status_mask = FER | PER; - - uart_update_timeout(port, termios->c_cflag, baud); - - /* Reset FIFOs */ - vt8500_write(&vt8500_port->uart, 0x88c, VT8500_URFCR); - while ((vt8500_read(&vt8500_port->uart, VT8500_URFCR) & 0xc) - && --loops) - cpu_relax(); - - /* Every possible FIFO-related interrupt */ - vt8500_port->ier = RX_FIFO_INTS | TX_FIFO_INTS; - - /* - * CTS flow control - */ - if (UART_ENABLE_MS(&vt8500_port->uart, termios->c_cflag)) - vt8500_port->ier |= TCTS; - - vt8500_write(&vt8500_port->uart, 0x881, VT8500_URFCR); - vt8500_write(&vt8500_port->uart, vt8500_port->ier, VT8500_URIER); - - spin_unlock_irqrestore(&port->lock, flags); -} - -static const char *vt8500_type(struct uart_port *port) -{ - struct vt8500_port *vt8500_port = - container_of(port, struct vt8500_port, uart); - return vt8500_port->name; -} - -static void vt8500_release_port(struct uart_port *port) -{ -} - -static int vt8500_request_port(struct uart_port *port) -{ - return 0; -} - -static void vt8500_config_port(struct uart_port *port, int flags) -{ - port->type = PORT_VT8500; -} - -static int vt8500_verify_port(struct uart_port *port, - struct serial_struct *ser) -{ - if (unlikely(ser->type != PORT_UNKNOWN && ser->type != PORT_VT8500)) - return -EINVAL; - if (unlikely(port->irq != ser->irq)) - return -EINVAL; - return 0; -} - -static struct vt8500_port *vt8500_uart_ports[4]; -static struct uart_driver vt8500_uart_driver; - -#ifdef CONFIG_SERIAL_VT8500_CONSOLE - -static inline void wait_for_xmitr(struct uart_port *port) -{ - unsigned int status, tmout = 10000; - - /* Wait up to 10ms for the character(s) to be sent. */ - do { - status = vt8500_read(port, VT8500_URFIDX); - - if (--tmout == 0) - break; - udelay(1); - } while (status & 0x10); -} - -static void vt8500_console_putchar(struct uart_port *port, int c) -{ - wait_for_xmitr(port); - writeb(c, port->membase + VT8500_TXFIFO); -} - -static void vt8500_console_write(struct console *co, const char *s, - unsigned int count) -{ - struct vt8500_port *vt8500_port = vt8500_uart_ports[co->index]; - unsigned long ier; - - BUG_ON(co->index < 0 || co->index >= vt8500_uart_driver.nr); - - ier = vt8500_read(&vt8500_port->uart, VT8500_URIER); - vt8500_write(&vt8500_port->uart, VT8500_URIER, 0); - - uart_console_write(&vt8500_port->uart, s, count, - vt8500_console_putchar); - - /* - * Finally, wait for transmitter to become empty - * and switch back to FIFO - */ - wait_for_xmitr(&vt8500_port->uart); - vt8500_write(&vt8500_port->uart, VT8500_URIER, ier); -} - -static int __init vt8500_console_setup(struct console *co, char *options) -{ - struct vt8500_port *vt8500_port; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - - if (unlikely(co->index >= vt8500_uart_driver.nr || co->index < 0)) - return -ENXIO; - - vt8500_port = vt8500_uart_ports[co->index]; - - if (!vt8500_port) - return -ENODEV; - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - - return uart_set_options(&vt8500_port->uart, - co, baud, parity, bits, flow); -} - -static struct console vt8500_console = { - .name = "ttyWMT", - .write = vt8500_console_write, - .device = uart_console_device, - .setup = vt8500_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &vt8500_uart_driver, -}; - -#define VT8500_CONSOLE (&vt8500_console) - -#else -#define VT8500_CONSOLE NULL -#endif - -static struct uart_ops vt8500_uart_pops = { - .tx_empty = vt8500_tx_empty, - .set_mctrl = vt8500_set_mctrl, - .get_mctrl = vt8500_get_mctrl, - .stop_tx = vt8500_stop_tx, - .start_tx = vt8500_start_tx, - .stop_rx = vt8500_stop_rx, - .enable_ms = vt8500_enable_ms, - .break_ctl = vt8500_break_ctl, - .startup = vt8500_startup, - .shutdown = vt8500_shutdown, - .set_termios = vt8500_set_termios, - .type = vt8500_type, - .release_port = vt8500_release_port, - .request_port = vt8500_request_port, - .config_port = vt8500_config_port, - .verify_port = vt8500_verify_port, -}; - -static struct uart_driver vt8500_uart_driver = { - .owner = THIS_MODULE, - .driver_name = "vt8500_serial", - .dev_name = "ttyWMT", - .nr = 6, - .cons = VT8500_CONSOLE, -}; - -static int __init vt8500_serial_probe(struct platform_device *pdev) -{ - struct vt8500_port *vt8500_port; - struct resource *mmres, *irqres; - int ret; - - mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0); - irqres = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!mmres || !irqres) - return -ENODEV; - - vt8500_port = kzalloc(sizeof(struct vt8500_port), GFP_KERNEL); - if (!vt8500_port) - return -ENOMEM; - - vt8500_port->uart.type = PORT_VT8500; - vt8500_port->uart.iotype = UPIO_MEM; - vt8500_port->uart.mapbase = mmres->start; - vt8500_port->uart.irq = irqres->start; - vt8500_port->uart.fifosize = 16; - vt8500_port->uart.ops = &vt8500_uart_pops; - vt8500_port->uart.line = pdev->id; - vt8500_port->uart.dev = &pdev->dev; - vt8500_port->uart.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF; - vt8500_port->uart.uartclk = 24000000; - - snprintf(vt8500_port->name, sizeof(vt8500_port->name), - "VT8500 UART%d", pdev->id); - - vt8500_port->uart.membase = ioremap(mmres->start, - mmres->end - mmres->start + 1); - if (!vt8500_port->uart.membase) { - ret = -ENOMEM; - goto err; - } - - vt8500_uart_ports[pdev->id] = vt8500_port; - - uart_add_one_port(&vt8500_uart_driver, &vt8500_port->uart); - - platform_set_drvdata(pdev, vt8500_port); - - return 0; - -err: - kfree(vt8500_port); - return ret; -} - -static int __devexit vt8500_serial_remove(struct platform_device *pdev) -{ - struct vt8500_port *vt8500_port = platform_get_drvdata(pdev); - - platform_set_drvdata(pdev, NULL); - uart_remove_one_port(&vt8500_uart_driver, &vt8500_port->uart); - kfree(vt8500_port); - - return 0; -} - -static struct platform_driver vt8500_platform_driver = { - .probe = vt8500_serial_probe, - .remove = vt8500_serial_remove, - .driver = { - .name = "vt8500_serial", - .owner = THIS_MODULE, - }, -}; - -static int __init vt8500_serial_init(void) -{ - int ret; - - ret = uart_register_driver(&vt8500_uart_driver); - if (unlikely(ret)) - return ret; - - ret = platform_driver_register(&vt8500_platform_driver); - - if (unlikely(ret)) - uart_unregister_driver(&vt8500_uart_driver); - - return ret; -} - -static void __exit vt8500_serial_exit(void) -{ -#ifdef CONFIG_SERIAL_VT8500_CONSOLE - unregister_console(&vt8500_console); -#endif - platform_driver_unregister(&vt8500_platform_driver); - uart_unregister_driver(&vt8500_uart_driver); -} - -module_init(vt8500_serial_init); -module_exit(vt8500_serial_exit); - -MODULE_AUTHOR("Alexey Charkov <alchark@gmail.com>"); -MODULE_DESCRIPTION("Driver for vt8500 serial device"); -MODULE_LICENSE("GPL"); diff --git a/drivers/serial/zs.c b/drivers/serial/zs.c deleted file mode 100644 index 1a7fd3e70315..000000000000 --- a/drivers/serial/zs.c +++ /dev/null @@ -1,1304 +0,0 @@ -/* - * zs.c: Serial port driver for IOASIC DECstations. - * - * Derived from drivers/sbus/char/sunserial.c by Paul Mackerras. - * Derived from drivers/macintosh/macserial.c by Harald Koerfgen. - * - * DECstation changes - * Copyright (C) 1998-2000 Harald Koerfgen - * Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007 Maciej W. Rozycki - * - * For the rest of the code the original Copyright applies: - * Copyright (C) 1996 Paul Mackerras (Paul.Mackerras@cs.anu.edu.au) - * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) - * - * - * Note: for IOASIC systems the wiring is as follows: - * - * mouse/keyboard: - * DIN-7 MJ-4 signal SCC - * 2 1 TxD <- A.TxD - * 3 4 RxD -> A.RxD - * - * EIA-232/EIA-423: - * DB-25 MMJ-6 signal SCC - * 2 2 TxD <- B.TxD - * 3 5 RxD -> B.RxD - * 4 RTS <- ~A.RTS - * 5 CTS -> ~B.CTS - * 6 6 DSR -> ~A.SYNC - * 8 CD -> ~B.DCD - * 12 DSRS(DCE) -> ~A.CTS (*) - * 15 TxC -> B.TxC - * 17 RxC -> B.RxC - * 20 1 DTR <- ~A.DTR - * 22 RI -> ~A.DCD - * 23 DSRS(DTE) <- ~B.RTS - * - * (*) EIA-232 defines the signal at this pin to be SCD, while DSRS(DCE) - * is shared with DSRS(DTE) at pin 23. - * - * As you can immediately notice the wiring of the RTS, DTR and DSR signals - * is a bit odd. This makes the handling of port B unnecessarily - * complicated and prevents the use of some automatic modes of operation. - */ - -#if defined(CONFIG_SERIAL_ZS_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) -#define SUPPORT_SYSRQ -#endif - -#include <linux/bug.h> -#include <linux/console.h> -#include <linux/delay.h> -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/ioport.h> -#include <linux/irqflags.h> -#include <linux/kernel.h> -#include <linux/major.h> -#include <linux/serial.h> -#include <linux/serial_core.h> -#include <linux/spinlock.h> -#include <linux/sysrq.h> -#include <linux/tty.h> -#include <linux/types.h> - -#include <asm/atomic.h> -#include <asm/system.h> - -#include <asm/dec/interrupts.h> -#include <asm/dec/ioasic_addrs.h> -#include <asm/dec/system.h> - -#include "zs.h" - - -MODULE_AUTHOR("Maciej W. Rozycki <macro@linux-mips.org>"); -MODULE_DESCRIPTION("DECstation Z85C30 serial driver"); -MODULE_LICENSE("GPL"); - - -static char zs_name[] __initdata = "DECstation Z85C30 serial driver version "; -static char zs_version[] __initdata = "0.10"; - -/* - * It would be nice to dynamically allocate everything that - * depends on ZS_NUM_SCCS, so we could support any number of - * Z85C30s, but for now... - */ -#define ZS_NUM_SCCS 2 /* Max # of ZS chips supported. */ -#define ZS_NUM_CHAN 2 /* 2 channels per chip. */ -#define ZS_CHAN_A 0 /* Index of the channel A. */ -#define ZS_CHAN_B 1 /* Index of the channel B. */ -#define ZS_CHAN_IO_SIZE 8 /* IOMEM space size. */ -#define ZS_CHAN_IO_STRIDE 4 /* Register alignment. */ -#define ZS_CHAN_IO_OFFSET 1 /* The SCC resides on the high byte - of the 16-bit IOBUS. */ -#define ZS_CLOCK 7372800 /* Z85C30 PCLK input clock rate. */ - -#define to_zport(uport) container_of(uport, struct zs_port, port) - -struct zs_parms { - resource_size_t scc[ZS_NUM_SCCS]; - int irq[ZS_NUM_SCCS]; -}; - -static struct zs_scc zs_sccs[ZS_NUM_SCCS]; - -static u8 zs_init_regs[ZS_NUM_REGS] __initdata = { - 0, /* write 0 */ - PAR_SPEC, /* write 1 */ - 0, /* write 2 */ - 0, /* write 3 */ - X16CLK | SB1, /* write 4 */ - 0, /* write 5 */ - 0, 0, 0, /* write 6, 7, 8 */ - MIE | DLC | NV, /* write 9 */ - NRZ, /* write 10 */ - TCBR | RCBR, /* write 11 */ - 0, 0, /* BRG time constant, write 12 + 13 */ - BRSRC | BRENABL, /* write 14 */ - 0, /* write 15 */ -}; - -/* - * Debugging. - */ -#undef ZS_DEBUG_REGS - - -/* - * Reading and writing Z85C30 registers. - */ -static void recovery_delay(void) -{ - udelay(2); -} - -static u8 read_zsreg(struct zs_port *zport, int reg) -{ - void __iomem *control = zport->port.membase + ZS_CHAN_IO_OFFSET; - u8 retval; - - if (reg != 0) { - writeb(reg & 0xf, control); - fast_iob(); - recovery_delay(); - } - retval = readb(control); - recovery_delay(); - return retval; -} - -static void write_zsreg(struct zs_port *zport, int reg, u8 value) -{ - void __iomem *control = zport->port.membase + ZS_CHAN_IO_OFFSET; - - if (reg != 0) { - writeb(reg & 0xf, control); - fast_iob(); recovery_delay(); - } - writeb(value, control); - fast_iob(); - recovery_delay(); - return; -} - -static u8 read_zsdata(struct zs_port *zport) -{ - void __iomem *data = zport->port.membase + - ZS_CHAN_IO_STRIDE + ZS_CHAN_IO_OFFSET; - u8 retval; - - retval = readb(data); - recovery_delay(); - return retval; -} - -static void write_zsdata(struct zs_port *zport, u8 value) -{ - void __iomem *data = zport->port.membase + - ZS_CHAN_IO_STRIDE + ZS_CHAN_IO_OFFSET; - - writeb(value, data); - fast_iob(); - recovery_delay(); - return; -} - -#ifdef ZS_DEBUG_REGS -void zs_dump(void) -{ - struct zs_port *zport; - int i, j; - - for (i = 0; i < ZS_NUM_SCCS * ZS_NUM_CHAN; i++) { - zport = &zs_sccs[i / ZS_NUM_CHAN].zport[i % ZS_NUM_CHAN]; - - if (!zport->scc) - continue; - - for (j = 0; j < 16; j++) - printk("W%-2d = 0x%02x\t", j, zport->regs[j]); - printk("\n"); - for (j = 0; j < 16; j++) - printk("R%-2d = 0x%02x\t", j, read_zsreg(zport, j)); - printk("\n\n"); - } -} -#endif - - -static void zs_spin_lock_cond_irq(spinlock_t *lock, int irq) -{ - if (irq) - spin_lock_irq(lock); - else - spin_lock(lock); -} - -static void zs_spin_unlock_cond_irq(spinlock_t *lock, int irq) -{ - if (irq) - spin_unlock_irq(lock); - else - spin_unlock(lock); -} - -static int zs_receive_drain(struct zs_port *zport) -{ - int loops = 10000; - - while ((read_zsreg(zport, R0) & Rx_CH_AV) && --loops) - read_zsdata(zport); - return loops; -} - -static int zs_transmit_drain(struct zs_port *zport, int irq) -{ - struct zs_scc *scc = zport->scc; - int loops = 10000; - - while (!(read_zsreg(zport, R0) & Tx_BUF_EMP) && --loops) { - zs_spin_unlock_cond_irq(&scc->zlock, irq); - udelay(2); - zs_spin_lock_cond_irq(&scc->zlock, irq); - } - return loops; -} - -static int zs_line_drain(struct zs_port *zport, int irq) -{ - struct zs_scc *scc = zport->scc; - int loops = 10000; - - while (!(read_zsreg(zport, R1) & ALL_SNT) && --loops) { - zs_spin_unlock_cond_irq(&scc->zlock, irq); - udelay(2); - zs_spin_lock_cond_irq(&scc->zlock, irq); - } - return loops; -} - - -static void load_zsregs(struct zs_port *zport, u8 *regs, int irq) -{ - /* Let the current transmission finish. */ - zs_line_drain(zport, irq); - /* Load 'em up. */ - write_zsreg(zport, R3, regs[3] & ~RxENABLE); - write_zsreg(zport, R5, regs[5] & ~TxENAB); - write_zsreg(zport, R4, regs[4]); - write_zsreg(zport, R9, regs[9]); - write_zsreg(zport, R1, regs[1]); - write_zsreg(zport, R2, regs[2]); - write_zsreg(zport, R10, regs[10]); - write_zsreg(zport, R14, regs[14] & ~BRENABL); - write_zsreg(zport, R11, regs[11]); - write_zsreg(zport, R12, regs[12]); - write_zsreg(zport, R13, regs[13]); - write_zsreg(zport, R14, regs[14]); - write_zsreg(zport, R15, regs[15]); - if (regs[3] & RxENABLE) - write_zsreg(zport, R3, regs[3]); - if (regs[5] & TxENAB) - write_zsreg(zport, R5, regs[5]); - return; -} - - -/* - * Status handling routines. - */ - -/* - * zs_tx_empty() -- get the transmitter empty status - * - * Purpose: Let user call ioctl() to get info when the UART physically - * is emptied. On bus types like RS485, the transmitter must - * release the bus after transmitting. This must be done when - * the transmit shift register is empty, not be done when the - * transmit holding register is empty. This functionality - * allows an RS485 driver to be written in user space. - */ -static unsigned int zs_tx_empty(struct uart_port *uport) -{ - struct zs_port *zport = to_zport(uport); - struct zs_scc *scc = zport->scc; - unsigned long flags; - u8 status; - - spin_lock_irqsave(&scc->zlock, flags); - status = read_zsreg(zport, R1); - spin_unlock_irqrestore(&scc->zlock, flags); - - return status & ALL_SNT ? TIOCSER_TEMT : 0; -} - -static unsigned int zs_raw_get_ab_mctrl(struct zs_port *zport_a, - struct zs_port *zport_b) -{ - u8 status_a, status_b; - unsigned int mctrl; - - status_a = read_zsreg(zport_a, R0); - status_b = read_zsreg(zport_b, R0); - - mctrl = ((status_b & CTS) ? TIOCM_CTS : 0) | - ((status_b & DCD) ? TIOCM_CAR : 0) | - ((status_a & DCD) ? TIOCM_RNG : 0) | - ((status_a & SYNC_HUNT) ? TIOCM_DSR : 0); - - return mctrl; -} - -static unsigned int zs_raw_get_mctrl(struct zs_port *zport) -{ - struct zs_port *zport_a = &zport->scc->zport[ZS_CHAN_A]; - - return zport != zport_a ? zs_raw_get_ab_mctrl(zport_a, zport) : 0; -} - -static unsigned int zs_raw_xor_mctrl(struct zs_port *zport) -{ - struct zs_port *zport_a = &zport->scc->zport[ZS_CHAN_A]; - unsigned int mmask, mctrl, delta; - u8 mask_a, mask_b; - - if (zport == zport_a) - return 0; - - mask_a = zport_a->regs[15]; - mask_b = zport->regs[15]; - - mmask = ((mask_b & CTSIE) ? TIOCM_CTS : 0) | - ((mask_b & DCDIE) ? TIOCM_CAR : 0) | - ((mask_a & DCDIE) ? TIOCM_RNG : 0) | - ((mask_a & SYNCIE) ? TIOCM_DSR : 0); - - mctrl = zport->mctrl; - if (mmask) { - mctrl &= ~mmask; - mctrl |= zs_raw_get_ab_mctrl(zport_a, zport) & mmask; - } - - delta = mctrl ^ zport->mctrl; - if (delta) - zport->mctrl = mctrl; - - return delta; -} - -static unsigned int zs_get_mctrl(struct uart_port *uport) -{ - struct zs_port *zport = to_zport(uport); - struct zs_scc *scc = zport->scc; - unsigned int mctrl; - - spin_lock(&scc->zlock); - mctrl = zs_raw_get_mctrl(zport); - spin_unlock(&scc->zlock); - - return mctrl; -} - -static void zs_set_mctrl(struct uart_port *uport, unsigned int mctrl) -{ - struct zs_port *zport = to_zport(uport); - struct zs_scc *scc = zport->scc; - struct zs_port *zport_a = &scc->zport[ZS_CHAN_A]; - u8 oldloop, newloop; - - spin_lock(&scc->zlock); - if (zport != zport_a) { - if (mctrl & TIOCM_DTR) - zport_a->regs[5] |= DTR; - else - zport_a->regs[5] &= ~DTR; - if (mctrl & TIOCM_RTS) - zport_a->regs[5] |= RTS; - else - zport_a->regs[5] &= ~RTS; - write_zsreg(zport_a, R5, zport_a->regs[5]); - } - - /* Rarely modified, so don't poke at hardware unless necessary. */ - oldloop = zport->regs[14]; - newloop = oldloop; - if (mctrl & TIOCM_LOOP) - newloop |= LOOPBAK; - else - newloop &= ~LOOPBAK; - if (newloop != oldloop) { - zport->regs[14] = newloop; - write_zsreg(zport, R14, zport->regs[14]); - } - spin_unlock(&scc->zlock); -} - -static void zs_raw_stop_tx(struct zs_port *zport) -{ - write_zsreg(zport, R0, RES_Tx_P); - zport->tx_stopped = 1; -} - -static void zs_stop_tx(struct uart_port *uport) -{ - struct zs_port *zport = to_zport(uport); - struct zs_scc *scc = zport->scc; - - spin_lock(&scc->zlock); - zs_raw_stop_tx(zport); - spin_unlock(&scc->zlock); -} - -static void zs_raw_transmit_chars(struct zs_port *); - -static void zs_start_tx(struct uart_port *uport) -{ - struct zs_port *zport = to_zport(uport); - struct zs_scc *scc = zport->scc; - - spin_lock(&scc->zlock); - if (zport->tx_stopped) { - zs_transmit_drain(zport, 0); - zport->tx_stopped = 0; - zs_raw_transmit_chars(zport); - } - spin_unlock(&scc->zlock); -} - -static void zs_stop_rx(struct uart_port *uport) -{ - struct zs_port *zport = to_zport(uport); - struct zs_scc *scc = zport->scc; - struct zs_port *zport_a = &scc->zport[ZS_CHAN_A]; - - spin_lock(&scc->zlock); - zport->regs[15] &= ~BRKIE; - zport->regs[1] &= ~(RxINT_MASK | TxINT_ENAB); - zport->regs[1] |= RxINT_DISAB; - - if (zport != zport_a) { - /* A-side DCD tracks RI and SYNC tracks DSR. */ - zport_a->regs[15] &= ~(DCDIE | SYNCIE); - write_zsreg(zport_a, R15, zport_a->regs[15]); - if (!(zport_a->regs[15] & BRKIE)) { - zport_a->regs[1] &= ~EXT_INT_ENAB; - write_zsreg(zport_a, R1, zport_a->regs[1]); - } - - /* This-side DCD tracks DCD and CTS tracks CTS. */ - zport->regs[15] &= ~(DCDIE | CTSIE); - zport->regs[1] &= ~EXT_INT_ENAB; - } else { - /* DCD tracks RI and SYNC tracks DSR for the B side. */ - if (!(zport->regs[15] & (DCDIE | SYNCIE))) - zport->regs[1] &= ~EXT_INT_ENAB; - } - - write_zsreg(zport, R15, zport->regs[15]); - write_zsreg(zport, R1, zport->regs[1]); - spin_unlock(&scc->zlock); -} - -static void zs_enable_ms(struct uart_port *uport) -{ - struct zs_port *zport = to_zport(uport); - struct zs_scc *scc = zport->scc; - struct zs_port *zport_a = &scc->zport[ZS_CHAN_A]; - - if (zport == zport_a) - return; - - spin_lock(&scc->zlock); - - /* Clear Ext interrupts if not being handled already. */ - if (!(zport_a->regs[1] & EXT_INT_ENAB)) - write_zsreg(zport_a, R0, RES_EXT_INT); - - /* A-side DCD tracks RI and SYNC tracks DSR. */ - zport_a->regs[1] |= EXT_INT_ENAB; - zport_a->regs[15] |= DCDIE | SYNCIE; - - /* This-side DCD tracks DCD and CTS tracks CTS. */ - zport->regs[15] |= DCDIE | CTSIE; - - zs_raw_xor_mctrl(zport); - - write_zsreg(zport_a, R1, zport_a->regs[1]); - write_zsreg(zport_a, R15, zport_a->regs[15]); - write_zsreg(zport, R15, zport->regs[15]); - spin_unlock(&scc->zlock); -} - -static void zs_break_ctl(struct uart_port *uport, int break_state) -{ - struct zs_port *zport = to_zport(uport); - struct zs_scc *scc = zport->scc; - unsigned long flags; - - spin_lock_irqsave(&scc->zlock, flags); - if (break_state == -1) - zport->regs[5] |= SND_BRK; - else - zport->regs[5] &= ~SND_BRK; - write_zsreg(zport, R5, zport->regs[5]); - spin_unlock_irqrestore(&scc->zlock, flags); -} - - -/* - * Interrupt handling routines. - */ -#define Rx_BRK 0x0100 /* BREAK event software flag. */ -#define Rx_SYS 0x0200 /* SysRq event software flag. */ - -static void zs_receive_chars(struct zs_port *zport) -{ - struct uart_port *uport = &zport->port; - struct zs_scc *scc = zport->scc; - struct uart_icount *icount; - unsigned int avail, status, ch, flag; - int count; - - for (count = 16; count; count--) { - spin_lock(&scc->zlock); - avail = read_zsreg(zport, R0) & Rx_CH_AV; - spin_unlock(&scc->zlock); - if (!avail) - break; - - spin_lock(&scc->zlock); - status = read_zsreg(zport, R1) & (Rx_OVR | FRM_ERR | PAR_ERR); - ch = read_zsdata(zport); - spin_unlock(&scc->zlock); - - flag = TTY_NORMAL; - - icount = &uport->icount; - icount->rx++; - - /* Handle the null char got when BREAK is removed. */ - if (!ch) - status |= zport->tty_break; - if (unlikely(status & - (Rx_OVR | FRM_ERR | PAR_ERR | Rx_SYS | Rx_BRK))) { - zport->tty_break = 0; - - /* Reset the error indication. */ - if (status & (Rx_OVR | FRM_ERR | PAR_ERR)) { - spin_lock(&scc->zlock); - write_zsreg(zport, R0, ERR_RES); - spin_unlock(&scc->zlock); - } - - if (status & (Rx_SYS | Rx_BRK)) { - icount->brk++; - /* SysRq discards the null char. */ - if (status & Rx_SYS) - continue; - } else if (status & FRM_ERR) - icount->frame++; - else if (status & PAR_ERR) - icount->parity++; - if (status & Rx_OVR) - icount->overrun++; - - status &= uport->read_status_mask; - if (status & Rx_BRK) - flag = TTY_BREAK; - else if (status & FRM_ERR) - flag = TTY_FRAME; - else if (status & PAR_ERR) - flag = TTY_PARITY; - } - - if (uart_handle_sysrq_char(uport, ch)) - continue; - - uart_insert_char(uport, status, Rx_OVR, ch, flag); - } - - tty_flip_buffer_push(uport->state->port.tty); -} - -static void zs_raw_transmit_chars(struct zs_port *zport) -{ - struct circ_buf *xmit = &zport->port.state->xmit; - - /* XON/XOFF chars. */ - if (zport->port.x_char) { - write_zsdata(zport, zport->port.x_char); - zport->port.icount.tx++; - zport->port.x_char = 0; - return; - } - - /* If nothing to do or stopped or hardware stopped. */ - if (uart_circ_empty(xmit) || uart_tx_stopped(&zport->port)) { - zs_raw_stop_tx(zport); - return; - } - - /* Send char. */ - write_zsdata(zport, xmit->buf[xmit->tail]); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - zport->port.icount.tx++; - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&zport->port); - - /* Are we are done? */ - if (uart_circ_empty(xmit)) - zs_raw_stop_tx(zport); -} - -static void zs_transmit_chars(struct zs_port *zport) -{ - struct zs_scc *scc = zport->scc; - - spin_lock(&scc->zlock); - zs_raw_transmit_chars(zport); - spin_unlock(&scc->zlock); -} - -static void zs_status_handle(struct zs_port *zport, struct zs_port *zport_a) -{ - struct uart_port *uport = &zport->port; - struct zs_scc *scc = zport->scc; - unsigned int delta; - u8 status, brk; - - spin_lock(&scc->zlock); - - /* Get status from Read Register 0. */ - status = read_zsreg(zport, R0); - - if (zport->regs[15] & BRKIE) { - brk = status & BRK_ABRT; - if (brk && !zport->brk) { - spin_unlock(&scc->zlock); - if (uart_handle_break(uport)) - zport->tty_break = Rx_SYS; - else - zport->tty_break = Rx_BRK; - spin_lock(&scc->zlock); - } - zport->brk = brk; - } - - if (zport != zport_a) { - delta = zs_raw_xor_mctrl(zport); - spin_unlock(&scc->zlock); - - if (delta & TIOCM_CTS) - uart_handle_cts_change(uport, - zport->mctrl & TIOCM_CTS); - if (delta & TIOCM_CAR) - uart_handle_dcd_change(uport, - zport->mctrl & TIOCM_CAR); - if (delta & TIOCM_RNG) - uport->icount.dsr++; - if (delta & TIOCM_DSR) - uport->icount.rng++; - - if (delta) - wake_up_interruptible(&uport->state->port.delta_msr_wait); - - spin_lock(&scc->zlock); - } - - /* Clear the status condition... */ - write_zsreg(zport, R0, RES_EXT_INT); - - spin_unlock(&scc->zlock); -} - -/* - * This is the Z85C30 driver's generic interrupt routine. - */ -static irqreturn_t zs_interrupt(int irq, void *dev_id) -{ - struct zs_scc *scc = dev_id; - struct zs_port *zport_a = &scc->zport[ZS_CHAN_A]; - struct zs_port *zport_b = &scc->zport[ZS_CHAN_B]; - irqreturn_t status = IRQ_NONE; - u8 zs_intreg; - int count; - - /* - * NOTE: The read register 3, which holds the irq status, - * does so for both channels on each chip. Although - * the status value itself must be read from the A - * channel and is only valid when read from channel A. - * Yes... broken hardware... - */ - for (count = 16; count; count--) { - spin_lock(&scc->zlock); - zs_intreg = read_zsreg(zport_a, R3); - spin_unlock(&scc->zlock); - if (!zs_intreg) - break; - - /* - * We do not like losing characters, so we prioritise - * interrupt sources a little bit differently than - * the SCC would, was it allowed to. - */ - if (zs_intreg & CHBRxIP) - zs_receive_chars(zport_b); - if (zs_intreg & CHARxIP) - zs_receive_chars(zport_a); - if (zs_intreg & CHBEXT) - zs_status_handle(zport_b, zport_a); - if (zs_intreg & CHAEXT) - zs_status_handle(zport_a, zport_a); - if (zs_intreg & CHBTxIP) - zs_transmit_chars(zport_b); - if (zs_intreg & CHATxIP) - zs_transmit_chars(zport_a); - - status = IRQ_HANDLED; - } - - return status; -} - - -/* - * Finally, routines used to initialize the serial port. - */ -static int zs_startup(struct uart_port *uport) -{ - struct zs_port *zport = to_zport(uport); - struct zs_scc *scc = zport->scc; - unsigned long flags; - int irq_guard; - int ret; - - irq_guard = atomic_add_return(1, &scc->irq_guard); - if (irq_guard == 1) { - ret = request_irq(zport->port.irq, zs_interrupt, - IRQF_SHARED, "scc", scc); - if (ret) { - atomic_add(-1, &scc->irq_guard); - printk(KERN_ERR "zs: can't get irq %d\n", - zport->port.irq); - return ret; - } - } - - spin_lock_irqsave(&scc->zlock, flags); - - /* Clear the receive FIFO. */ - zs_receive_drain(zport); - - /* Clear the interrupt registers. */ - write_zsreg(zport, R0, ERR_RES); - write_zsreg(zport, R0, RES_Tx_P); - /* But Ext only if not being handled already. */ - if (!(zport->regs[1] & EXT_INT_ENAB)) - write_zsreg(zport, R0, RES_EXT_INT); - - /* Finally, enable sequencing and interrupts. */ - zport->regs[1] &= ~RxINT_MASK; - zport->regs[1] |= RxINT_ALL | TxINT_ENAB | EXT_INT_ENAB; - zport->regs[3] |= RxENABLE; - zport->regs[15] |= BRKIE; - write_zsreg(zport, R1, zport->regs[1]); - write_zsreg(zport, R3, zport->regs[3]); - write_zsreg(zport, R5, zport->regs[5]); - write_zsreg(zport, R15, zport->regs[15]); - - /* Record the current state of RR0. */ - zport->mctrl = zs_raw_get_mctrl(zport); - zport->brk = read_zsreg(zport, R0) & BRK_ABRT; - - zport->tx_stopped = 1; - - spin_unlock_irqrestore(&scc->zlock, flags); - - return 0; -} - -static void zs_shutdown(struct uart_port *uport) -{ - struct zs_port *zport = to_zport(uport); - struct zs_scc *scc = zport->scc; - unsigned long flags; - int irq_guard; - - spin_lock_irqsave(&scc->zlock, flags); - - zport->regs[3] &= ~RxENABLE; - write_zsreg(zport, R5, zport->regs[5]); - write_zsreg(zport, R3, zport->regs[3]); - - spin_unlock_irqrestore(&scc->zlock, flags); - - irq_guard = atomic_add_return(-1, &scc->irq_guard); - if (!irq_guard) - free_irq(zport->port.irq, scc); -} - - -static void zs_reset(struct zs_port *zport) -{ - struct zs_scc *scc = zport->scc; - int irq; - unsigned long flags; - - spin_lock_irqsave(&scc->zlock, flags); - irq = !irqs_disabled_flags(flags); - if (!scc->initialised) { - /* Reset the pointer first, just in case... */ - read_zsreg(zport, R0); - /* And let the current transmission finish. */ - zs_line_drain(zport, irq); - write_zsreg(zport, R9, FHWRES); - udelay(10); - write_zsreg(zport, R9, 0); - scc->initialised = 1; - } - load_zsregs(zport, zport->regs, irq); - spin_unlock_irqrestore(&scc->zlock, flags); -} - -static void zs_set_termios(struct uart_port *uport, struct ktermios *termios, - struct ktermios *old_termios) -{ - struct zs_port *zport = to_zport(uport); - struct zs_scc *scc = zport->scc; - struct zs_port *zport_a = &scc->zport[ZS_CHAN_A]; - int irq; - unsigned int baud, brg; - unsigned long flags; - - spin_lock_irqsave(&scc->zlock, flags); - irq = !irqs_disabled_flags(flags); - - /* Byte size. */ - zport->regs[3] &= ~RxNBITS_MASK; - zport->regs[5] &= ~TxNBITS_MASK; - switch (termios->c_cflag & CSIZE) { - case CS5: - zport->regs[3] |= Rx5; - zport->regs[5] |= Tx5; - break; - case CS6: - zport->regs[3] |= Rx6; - zport->regs[5] |= Tx6; - break; - case CS7: - zport->regs[3] |= Rx7; - zport->regs[5] |= Tx7; - break; - case CS8: - default: - zport->regs[3] |= Rx8; - zport->regs[5] |= Tx8; - break; - } - - /* Parity and stop bits. */ - zport->regs[4] &= ~(XCLK_MASK | SB_MASK | PAR_ENA | PAR_EVEN); - if (termios->c_cflag & CSTOPB) - zport->regs[4] |= SB2; - else - zport->regs[4] |= SB1; - if (termios->c_cflag & PARENB) - zport->regs[4] |= PAR_ENA; - if (!(termios->c_cflag & PARODD)) - zport->regs[4] |= PAR_EVEN; - switch (zport->clk_mode) { - case 64: - zport->regs[4] |= X64CLK; - break; - case 32: - zport->regs[4] |= X32CLK; - break; - case 16: - zport->regs[4] |= X16CLK; - break; - case 1: - zport->regs[4] |= X1CLK; - break; - default: - BUG(); - } - - baud = uart_get_baud_rate(uport, termios, old_termios, 0, - uport->uartclk / zport->clk_mode / 4); - - brg = ZS_BPS_TO_BRG(baud, uport->uartclk / zport->clk_mode); - zport->regs[12] = brg & 0xff; - zport->regs[13] = (brg >> 8) & 0xff; - - uart_update_timeout(uport, termios->c_cflag, baud); - - uport->read_status_mask = Rx_OVR; - if (termios->c_iflag & INPCK) - uport->read_status_mask |= FRM_ERR | PAR_ERR; - if (termios->c_iflag & (BRKINT | PARMRK)) - uport->read_status_mask |= Rx_BRK; - - uport->ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - uport->ignore_status_mask |= FRM_ERR | PAR_ERR; - if (termios->c_iflag & IGNBRK) { - uport->ignore_status_mask |= Rx_BRK; - if (termios->c_iflag & IGNPAR) - uport->ignore_status_mask |= Rx_OVR; - } - - if (termios->c_cflag & CREAD) - zport->regs[3] |= RxENABLE; - else - zport->regs[3] &= ~RxENABLE; - - if (zport != zport_a) { - if (!(termios->c_cflag & CLOCAL)) { - zport->regs[15] |= DCDIE; - } else - zport->regs[15] &= ~DCDIE; - if (termios->c_cflag & CRTSCTS) { - zport->regs[15] |= CTSIE; - } else - zport->regs[15] &= ~CTSIE; - zs_raw_xor_mctrl(zport); - } - - /* Load up the new values. */ - load_zsregs(zport, zport->regs, irq); - - spin_unlock_irqrestore(&scc->zlock, flags); -} - -/* - * Hack alert! - * Required solely so that the initial PROM-based console - * works undisturbed in parallel with this one. - */ -static void zs_pm(struct uart_port *uport, unsigned int state, - unsigned int oldstate) -{ - struct zs_port *zport = to_zport(uport); - - if (state < 3) - zport->regs[5] |= TxENAB; - else - zport->regs[5] &= ~TxENAB; - write_zsreg(zport, R5, zport->regs[5]); -} - - -static const char *zs_type(struct uart_port *uport) -{ - return "Z85C30 SCC"; -} - -static void zs_release_port(struct uart_port *uport) -{ - iounmap(uport->membase); - uport->membase = 0; - release_mem_region(uport->mapbase, ZS_CHAN_IO_SIZE); -} - -static int zs_map_port(struct uart_port *uport) -{ - if (!uport->membase) - uport->membase = ioremap_nocache(uport->mapbase, - ZS_CHAN_IO_SIZE); - if (!uport->membase) { - printk(KERN_ERR "zs: Cannot map MMIO\n"); - return -ENOMEM; - } - return 0; -} - -static int zs_request_port(struct uart_port *uport) -{ - int ret; - - if (!request_mem_region(uport->mapbase, ZS_CHAN_IO_SIZE, "scc")) { - printk(KERN_ERR "zs: Unable to reserve MMIO resource\n"); - return -EBUSY; - } - ret = zs_map_port(uport); - if (ret) { - release_mem_region(uport->mapbase, ZS_CHAN_IO_SIZE); - return ret; - } - return 0; -} - -static void zs_config_port(struct uart_port *uport, int flags) -{ - struct zs_port *zport = to_zport(uport); - - if (flags & UART_CONFIG_TYPE) { - if (zs_request_port(uport)) - return; - - uport->type = PORT_ZS; - - zs_reset(zport); - } -} - -static int zs_verify_port(struct uart_port *uport, struct serial_struct *ser) -{ - struct zs_port *zport = to_zport(uport); - int ret = 0; - - if (ser->type != PORT_UNKNOWN && ser->type != PORT_ZS) - ret = -EINVAL; - if (ser->irq != uport->irq) - ret = -EINVAL; - if (ser->baud_base != uport->uartclk / zport->clk_mode / 4) - ret = -EINVAL; - return ret; -} - - -static struct uart_ops zs_ops = { - .tx_empty = zs_tx_empty, - .set_mctrl = zs_set_mctrl, - .get_mctrl = zs_get_mctrl, - .stop_tx = zs_stop_tx, - .start_tx = zs_start_tx, - .stop_rx = zs_stop_rx, - .enable_ms = zs_enable_ms, - .break_ctl = zs_break_ctl, - .startup = zs_startup, - .shutdown = zs_shutdown, - .set_termios = zs_set_termios, - .pm = zs_pm, - .type = zs_type, - .release_port = zs_release_port, - .request_port = zs_request_port, - .config_port = zs_config_port, - .verify_port = zs_verify_port, -}; - -/* - * Initialize Z85C30 port structures. - */ -static int __init zs_probe_sccs(void) -{ - static int probed; - struct zs_parms zs_parms; - int chip, side, irq; - int n_chips = 0; - int i; - - if (probed) - return 0; - - irq = dec_interrupt[DEC_IRQ_SCC0]; - if (irq >= 0) { - zs_parms.scc[n_chips] = IOASIC_SCC0; - zs_parms.irq[n_chips] = dec_interrupt[DEC_IRQ_SCC0]; - n_chips++; - } - irq = dec_interrupt[DEC_IRQ_SCC1]; - if (irq >= 0) { - zs_parms.scc[n_chips] = IOASIC_SCC1; - zs_parms.irq[n_chips] = dec_interrupt[DEC_IRQ_SCC1]; - n_chips++; - } - if (!n_chips) - return -ENXIO; - - probed = 1; - - for (chip = 0; chip < n_chips; chip++) { - spin_lock_init(&zs_sccs[chip].zlock); - for (side = 0; side < ZS_NUM_CHAN; side++) { - struct zs_port *zport = &zs_sccs[chip].zport[side]; - struct uart_port *uport = &zport->port; - - zport->scc = &zs_sccs[chip]; - zport->clk_mode = 16; - - uport->irq = zs_parms.irq[chip]; - uport->uartclk = ZS_CLOCK; - uport->fifosize = 1; - uport->iotype = UPIO_MEM; - uport->flags = UPF_BOOT_AUTOCONF; - uport->ops = &zs_ops; - uport->line = chip * ZS_NUM_CHAN + side; - uport->mapbase = dec_kn_slot_base + - zs_parms.scc[chip] + - (side ^ ZS_CHAN_B) * ZS_CHAN_IO_SIZE; - - for (i = 0; i < ZS_NUM_REGS; i++) - zport->regs[i] = zs_init_regs[i]; - } - } - - return 0; -} - - -#ifdef CONFIG_SERIAL_ZS_CONSOLE -static void zs_console_putchar(struct uart_port *uport, int ch) -{ - struct zs_port *zport = to_zport(uport); - struct zs_scc *scc = zport->scc; - int irq; - unsigned long flags; - - spin_lock_irqsave(&scc->zlock, flags); - irq = !irqs_disabled_flags(flags); - if (zs_transmit_drain(zport, irq)) - write_zsdata(zport, ch); - spin_unlock_irqrestore(&scc->zlock, flags); -} - -/* - * Print a string to the serial port trying not to disturb - * any possible real use of the port... - */ -static void zs_console_write(struct console *co, const char *s, - unsigned int count) -{ - int chip = co->index / ZS_NUM_CHAN, side = co->index % ZS_NUM_CHAN; - struct zs_port *zport = &zs_sccs[chip].zport[side]; - struct zs_scc *scc = zport->scc; - unsigned long flags; - u8 txint, txenb; - int irq; - - /* Disable transmit interrupts and enable the transmitter. */ - spin_lock_irqsave(&scc->zlock, flags); - txint = zport->regs[1]; - txenb = zport->regs[5]; - if (txint & TxINT_ENAB) { - zport->regs[1] = txint & ~TxINT_ENAB; - write_zsreg(zport, R1, zport->regs[1]); - } - if (!(txenb & TxENAB)) { - zport->regs[5] = txenb | TxENAB; - write_zsreg(zport, R5, zport->regs[5]); - } - spin_unlock_irqrestore(&scc->zlock, flags); - - uart_console_write(&zport->port, s, count, zs_console_putchar); - - /* Restore transmit interrupts and the transmitter enable. */ - spin_lock_irqsave(&scc->zlock, flags); - irq = !irqs_disabled_flags(flags); - zs_line_drain(zport, irq); - if (!(txenb & TxENAB)) { - zport->regs[5] &= ~TxENAB; - write_zsreg(zport, R5, zport->regs[5]); - } - if (txint & TxINT_ENAB) { - zport->regs[1] |= TxINT_ENAB; - write_zsreg(zport, R1, zport->regs[1]); - } - spin_unlock_irqrestore(&scc->zlock, flags); -} - -/* - * Setup serial console baud/bits/parity. We do two things here: - * - construct a cflag setting for the first uart_open() - * - initialise the serial port - * Return non-zero if we didn't find a serial port. - */ -static int __init zs_console_setup(struct console *co, char *options) -{ - int chip = co->index / ZS_NUM_CHAN, side = co->index % ZS_NUM_CHAN; - struct zs_port *zport = &zs_sccs[chip].zport[side]; - struct uart_port *uport = &zport->port; - int baud = 9600; - int bits = 8; - int parity = 'n'; - int flow = 'n'; - int ret; - - ret = zs_map_port(uport); - if (ret) - return ret; - - zs_reset(zport); - zs_pm(uport, 0, -1); - - if (options) - uart_parse_options(options, &baud, &parity, &bits, &flow); - return uart_set_options(uport, co, baud, parity, bits, flow); -} - -static struct uart_driver zs_reg; -static struct console zs_console = { - .name = "ttyS", - .write = zs_console_write, - .device = uart_console_device, - .setup = zs_console_setup, - .flags = CON_PRINTBUFFER, - .index = -1, - .data = &zs_reg, -}; - -/* - * Register console. - */ -static int __init zs_serial_console_init(void) -{ - int ret; - - ret = zs_probe_sccs(); - if (ret) - return ret; - register_console(&zs_console); - - return 0; -} - -console_initcall(zs_serial_console_init); - -#define SERIAL_ZS_CONSOLE &zs_console -#else -#define SERIAL_ZS_CONSOLE NULL -#endif /* CONFIG_SERIAL_ZS_CONSOLE */ - -static struct uart_driver zs_reg = { - .owner = THIS_MODULE, - .driver_name = "serial", - .dev_name = "ttyS", - .major = TTY_MAJOR, - .minor = 64, - .nr = ZS_NUM_SCCS * ZS_NUM_CHAN, - .cons = SERIAL_ZS_CONSOLE, -}; - -/* zs_init inits the driver. */ -static int __init zs_init(void) -{ - int i, ret; - - pr_info("%s%s\n", zs_name, zs_version); - - /* Find out how many Z85C30 SCCs we have. */ - ret = zs_probe_sccs(); - if (ret) - return ret; - - ret = uart_register_driver(&zs_reg); - if (ret) - return ret; - - for (i = 0; i < ZS_NUM_SCCS * ZS_NUM_CHAN; i++) { - struct zs_scc *scc = &zs_sccs[i / ZS_NUM_CHAN]; - struct zs_port *zport = &scc->zport[i % ZS_NUM_CHAN]; - struct uart_port *uport = &zport->port; - - if (zport->scc) - uart_add_one_port(&zs_reg, uport); - } - - return 0; -} - -static void __exit zs_exit(void) -{ - int i; - - for (i = ZS_NUM_SCCS * ZS_NUM_CHAN - 1; i >= 0; i--) { - struct zs_scc *scc = &zs_sccs[i / ZS_NUM_CHAN]; - struct zs_port *zport = &scc->zport[i % ZS_NUM_CHAN]; - struct uart_port *uport = &zport->port; - - if (zport->scc) - uart_remove_one_port(&zs_reg, uport); - } - - uart_unregister_driver(&zs_reg); -} - -module_init(zs_init); -module_exit(zs_exit); diff --git a/drivers/serial/zs.h b/drivers/serial/zs.h deleted file mode 100644 index aa921b57d827..000000000000 --- a/drivers/serial/zs.h +++ /dev/null @@ -1,284 +0,0 @@ -/* - * zs.h: Definitions for the DECstation Z85C30 serial driver. - * - * Adapted from drivers/sbus/char/sunserial.h by Paul Mackerras. - * Adapted from drivers/macintosh/macserial.h by Harald Koerfgen. - * - * Copyright (C) 1996 Paul Mackerras (Paul.Mackerras@cs.anu.edu.au) - * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) - * Copyright (C) 2004, 2005, 2007 Maciej W. Rozycki - */ -#ifndef _SERIAL_ZS_H -#define _SERIAL_ZS_H - -#ifdef __KERNEL__ - -#define ZS_NUM_REGS 16 - -/* - * This is our internal structure for each serial port's state. - */ -struct zs_port { - struct zs_scc *scc; /* Containing SCC. */ - struct uart_port port; /* Underlying UART. */ - - int clk_mode; /* May be 1, 16, 32, or 64. */ - - unsigned int tty_break; /* Set on BREAK condition. */ - int tx_stopped; /* Output is suspended. */ - - unsigned int mctrl; /* State of modem lines. */ - u8 brk; /* BREAK state from RR0. */ - - u8 regs[ZS_NUM_REGS]; /* Channel write registers. */ -}; - -/* - * Per-SCC state for locking and the interrupt handler. - */ -struct zs_scc { - struct zs_port zport[2]; - spinlock_t zlock; - atomic_t irq_guard; - int initialised; -}; - -#endif /* __KERNEL__ */ - -/* - * Conversion routines to/from brg time constants from/to bits per second. - */ -#define ZS_BRG_TO_BPS(brg, freq) ((freq) / 2 / ((brg) + 2)) -#define ZS_BPS_TO_BRG(bps, freq) ((((freq) + (bps)) / (2 * (bps))) - 2) - -/* - * The Zilog register set. - */ - -/* Write Register 0 (Command) */ -#define R0 0 /* Register selects */ -#define R1 1 -#define R2 2 -#define R3 3 -#define R4 4 -#define R5 5 -#define R6 6 -#define R7 7 -#define R8 8 -#define R9 9 -#define R10 10 -#define R11 11 -#define R12 12 -#define R13 13 -#define R14 14 -#define R15 15 - -#define NULLCODE 0 /* Null Code */ -#define POINT_HIGH 0x8 /* Select upper half of registers */ -#define RES_EXT_INT 0x10 /* Reset Ext. Status Interrupts */ -#define SEND_ABORT 0x18 /* HDLC Abort */ -#define RES_RxINT_FC 0x20 /* Reset RxINT on First Character */ -#define RES_Tx_P 0x28 /* Reset TxINT Pending */ -#define ERR_RES 0x30 /* Error Reset */ -#define RES_H_IUS 0x38 /* Reset highest IUS */ - -#define RES_Rx_CRC 0x40 /* Reset Rx CRC Checker */ -#define RES_Tx_CRC 0x80 /* Reset Tx CRC Checker */ -#define RES_EOM_L 0xC0 /* Reset EOM latch */ - -/* Write Register 1 (Tx/Rx/Ext Int Enable and WAIT/DMA Commands) */ -#define EXT_INT_ENAB 0x1 /* Ext Int Enable */ -#define TxINT_ENAB 0x2 /* Tx Int Enable */ -#define PAR_SPEC 0x4 /* Parity is special condition */ - -#define RxINT_DISAB 0 /* Rx Int Disable */ -#define RxINT_FCERR 0x8 /* Rx Int on First Character Only or Error */ -#define RxINT_ALL 0x10 /* Int on all Rx Characters or error */ -#define RxINT_ERR 0x18 /* Int on error only */ -#define RxINT_MASK 0x18 - -#define WT_RDY_RT 0x20 /* Wait/Ready on R/T */ -#define WT_FN_RDYFN 0x40 /* Wait/FN/Ready FN */ -#define WT_RDY_ENAB 0x80 /* Wait/Ready Enable */ - -/* Write Register 2 (Interrupt Vector) */ - -/* Write Register 3 (Receive Parameters and Control) */ -#define RxENABLE 0x1 /* Rx Enable */ -#define SYNC_L_INH 0x2 /* Sync Character Load Inhibit */ -#define ADD_SM 0x4 /* Address Search Mode (SDLC) */ -#define RxCRC_ENAB 0x8 /* Rx CRC Enable */ -#define ENT_HM 0x10 /* Enter Hunt Mode */ -#define AUTO_ENAB 0x20 /* Auto Enables */ -#define Rx5 0x0 /* Rx 5 Bits/Character */ -#define Rx7 0x40 /* Rx 7 Bits/Character */ -#define Rx6 0x80 /* Rx 6 Bits/Character */ -#define Rx8 0xc0 /* Rx 8 Bits/Character */ -#define RxNBITS_MASK 0xc0 - -/* Write Register 4 (Transmit/Receive Miscellaneous Parameters and Modes) */ -#define PAR_ENA 0x1 /* Parity Enable */ -#define PAR_EVEN 0x2 /* Parity Even/Odd* */ - -#define SYNC_ENAB 0 /* Sync Modes Enable */ -#define SB1 0x4 /* 1 stop bit/char */ -#define SB15 0x8 /* 1.5 stop bits/char */ -#define SB2 0xc /* 2 stop bits/char */ -#define SB_MASK 0xc - -#define MONSYNC 0 /* 8 Bit Sync character */ -#define BISYNC 0x10 /* 16 bit sync character */ -#define SDLC 0x20 /* SDLC Mode (01111110 Sync Flag) */ -#define EXTSYNC 0x30 /* External Sync Mode */ - -#define X1CLK 0x0 /* x1 clock mode */ -#define X16CLK 0x40 /* x16 clock mode */ -#define X32CLK 0x80 /* x32 clock mode */ -#define X64CLK 0xc0 /* x64 clock mode */ -#define XCLK_MASK 0xc0 - -/* Write Register 5 (Transmit Parameters and Controls) */ -#define TxCRC_ENAB 0x1 /* Tx CRC Enable */ -#define RTS 0x2 /* RTS */ -#define SDLC_CRC 0x4 /* SDLC/CRC-16 */ -#define TxENAB 0x8 /* Tx Enable */ -#define SND_BRK 0x10 /* Send Break */ -#define Tx5 0x0 /* Tx 5 bits (or less)/character */ -#define Tx7 0x20 /* Tx 7 bits/character */ -#define Tx6 0x40 /* Tx 6 bits/character */ -#define Tx8 0x60 /* Tx 8 bits/character */ -#define TxNBITS_MASK 0x60 -#define DTR 0x80 /* DTR */ - -/* Write Register 6 (Sync bits 0-7/SDLC Address Field) */ - -/* Write Register 7 (Sync bits 8-15/SDLC 01111110) */ - -/* Write Register 8 (Transmit Buffer) */ - -/* Write Register 9 (Master Interrupt Control) */ -#define VIS 1 /* Vector Includes Status */ -#define NV 2 /* No Vector */ -#define DLC 4 /* Disable Lower Chain */ -#define MIE 8 /* Master Interrupt Enable */ -#define STATHI 0x10 /* Status high */ -#define SOFTACK 0x20 /* Software Interrupt Acknowledge */ -#define NORESET 0 /* No reset on write to R9 */ -#define CHRB 0x40 /* Reset channel B */ -#define CHRA 0x80 /* Reset channel A */ -#define FHWRES 0xc0 /* Force hardware reset */ - -/* Write Register 10 (Miscellaneous Transmitter/Receiver Control Bits) */ -#define BIT6 1 /* 6 bit/8bit sync */ -#define LOOPMODE 2 /* SDLC Loop mode */ -#define ABUNDER 4 /* Abort/flag on SDLC xmit underrun */ -#define MARKIDLE 8 /* Mark/flag on idle */ -#define GAOP 0x10 /* Go active on poll */ -#define NRZ 0 /* NRZ mode */ -#define NRZI 0x20 /* NRZI mode */ -#define FM1 0x40 /* FM1 (transition = 1) */ -#define FM0 0x60 /* FM0 (transition = 0) */ -#define CRCPS 0x80 /* CRC Preset I/O */ - -/* Write Register 11 (Clock Mode Control) */ -#define TRxCXT 0 /* TRxC = Xtal output */ -#define TRxCTC 1 /* TRxC = Transmit clock */ -#define TRxCBR 2 /* TRxC = BR Generator Output */ -#define TRxCDP 3 /* TRxC = DPLL output */ -#define TRxCOI 4 /* TRxC O/I */ -#define TCRTxCP 0 /* Transmit clock = RTxC pin */ -#define TCTRxCP 8 /* Transmit clock = TRxC pin */ -#define TCBR 0x10 /* Transmit clock = BR Generator output */ -#define TCDPLL 0x18 /* Transmit clock = DPLL output */ -#define RCRTxCP 0 /* Receive clock = RTxC pin */ -#define RCTRxCP 0x20 /* Receive clock = TRxC pin */ -#define RCBR 0x40 /* Receive clock = BR Generator output */ -#define RCDPLL 0x60 /* Receive clock = DPLL output */ -#define RTxCX 0x80 /* RTxC Xtal/No Xtal */ - -/* Write Register 12 (Lower Byte of Baud Rate Generator Time Constant) */ - -/* Write Register 13 (Upper Byte of Baud Rate Generator Time Constant) */ - -/* Write Register 14 (Miscellaneous Control Bits) */ -#define BRENABL 1 /* Baud rate generator enable */ -#define BRSRC 2 /* Baud rate generator source */ -#define DTRREQ 4 /* DTR/Request function */ -#define AUTOECHO 8 /* Auto Echo */ -#define LOOPBAK 0x10 /* Local loopback */ -#define SEARCH 0x20 /* Enter search mode */ -#define RMC 0x40 /* Reset missing clock */ -#define DISDPLL 0x60 /* Disable DPLL */ -#define SSBR 0x80 /* Set DPLL source = BR generator */ -#define SSRTxC 0xa0 /* Set DPLL source = RTxC */ -#define SFMM 0xc0 /* Set FM mode */ -#define SNRZI 0xe0 /* Set NRZI mode */ - -/* Write Register 15 (External/Status Interrupt Control) */ -#define WR7P_EN 1 /* WR7 Prime SDLC Feature Enable */ -#define ZCIE 2 /* Zero count IE */ -#define DCDIE 8 /* DCD IE */ -#define SYNCIE 0x10 /* Sync/hunt IE */ -#define CTSIE 0x20 /* CTS IE */ -#define TxUIE 0x40 /* Tx Underrun/EOM IE */ -#define BRKIE 0x80 /* Break/Abort IE */ - - -/* Read Register 0 (Transmit/Receive Buffer Status and External Status) */ -#define Rx_CH_AV 0x1 /* Rx Character Available */ -#define ZCOUNT 0x2 /* Zero count */ -#define Tx_BUF_EMP 0x4 /* Tx Buffer empty */ -#define DCD 0x8 /* DCD */ -#define SYNC_HUNT 0x10 /* Sync/hunt */ -#define CTS 0x20 /* CTS */ -#define TxEOM 0x40 /* Tx underrun */ -#define BRK_ABRT 0x80 /* Break/Abort */ - -/* Read Register 1 (Special Receive Condition Status) */ -#define ALL_SNT 0x1 /* All sent */ -/* Residue Data for 8 Rx bits/char programmed */ -#define RES3 0x8 /* 0/3 */ -#define RES4 0x4 /* 0/4 */ -#define RES5 0xc /* 0/5 */ -#define RES6 0x2 /* 0/6 */ -#define RES7 0xa /* 0/7 */ -#define RES8 0x6 /* 0/8 */ -#define RES18 0xe /* 1/8 */ -#define RES28 0x0 /* 2/8 */ -/* Special Rx Condition Interrupts */ -#define PAR_ERR 0x10 /* Parity Error */ -#define Rx_OVR 0x20 /* Rx Overrun Error */ -#define FRM_ERR 0x40 /* CRC/Framing Error */ -#define END_FR 0x80 /* End of Frame (SDLC) */ - -/* Read Register 2 (Interrupt Vector (WR2) -- channel A). */ - -/* Read Register 2 (Modified Interrupt Vector -- channel B). */ - -/* Read Register 3 (Interrupt Pending Bits -- channel A only). */ -#define CHBEXT 0x1 /* Channel B Ext/Stat IP */ -#define CHBTxIP 0x2 /* Channel B Tx IP */ -#define CHBRxIP 0x4 /* Channel B Rx IP */ -#define CHAEXT 0x8 /* Channel A Ext/Stat IP */ -#define CHATxIP 0x10 /* Channel A Tx IP */ -#define CHARxIP 0x20 /* Channel A Rx IP */ - -/* Read Register 6 (SDLC FIFO Status and Byte Count LSB) */ - -/* Read Register 7 (SDLC FIFO Status and Byte Count MSB) */ - -/* Read Register 8 (Receive Data) */ - -/* Read Register 10 (Miscellaneous Status Bits) */ -#define ONLOOP 2 /* On loop */ -#define LOOPSEND 0x10 /* Loop sending */ -#define CLK2MIS 0x40 /* Two clocks missing */ -#define CLK1MIS 0x80 /* One clock missing */ - -/* Read Register 12 (Lower Byte of Baud Rate Generator Constant (WR12)) */ - -/* Read Register 13 (Upper Byte of Baud Rate Generator Constant (WR13) */ - -/* Read Register 15 (External/Status Interrupt Control (WR15)) */ - -#endif /* _SERIAL_ZS_H */ |