diff options
Diffstat (limited to 'drivers/char/epca.c')
| -rw-r--r-- | drivers/char/epca.c | 2784 |
1 files changed, 0 insertions, 2784 deletions
diff --git a/drivers/char/epca.c b/drivers/char/epca.c deleted file mode 100644 index d9df46aa0fba..000000000000 --- a/drivers/char/epca.c +++ /dev/null @@ -1,2784 +0,0 @@ -/* - Copyright (C) 1996 Digi International. - - For technical support please email digiLinux@dgii.com or - call Digi tech support at (612) 912-3456 - - ** This driver is no longer supported by Digi ** - - Much of this design and code came from epca.c which was - copyright (C) 1994, 1995 Troy De Jongh, and subsquently - modified by David Nugent, Christoph Lameter, Mike McLagan. - - 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., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ -/* See README.epca for change history --DAT*/ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/init.h> -#include <linux/sched.h> -#include <linux/serial.h> -#include <linux/delay.h> -#include <linux/ctype.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/slab.h> -#include <linux/ioport.h> -#include <linux/interrupt.h> -#include <linux/uaccess.h> -#include <linux/io.h> -#include <linux/spinlock.h> -#include <linux/pci.h> -#include "digiPCI.h" - - -#include "digi1.h" -#include "digiFep1.h" -#include "epca.h" -#include "epcaconfig.h" - -#define VERSION "1.3.0.1-LK2.6" - -/* This major needs to be submitted to Linux to join the majors list */ -#define DIGIINFOMAJOR 35 /* For Digi specific ioctl */ - - -#define MAXCARDS 7 -#define epcaassert(x, msg) if (!(x)) epca_error(__LINE__, msg) - -#define PFX "epca: " - -static int nbdevs, num_cards, liloconfig; -static int digi_poller_inhibited = 1 ; - -static int setup_error_code; -static int invalid_lilo_config; - -/* - * The ISA boards do window flipping into the same spaces so its only sane with - * a single lock. It's still pretty efficient. This lock guards the hardware - * and the tty_port lock guards the kernel side stuff like use counts. Take - * this lock inside the port lock if you must take both. - */ -static DEFINE_SPINLOCK(epca_lock); - -/* MAXBOARDS is typically 12, but ISA and EISA cards are restricted - to 7 below. */ -static struct board_info boards[MAXBOARDS]; - -static struct tty_driver *pc_driver; -static struct tty_driver *pc_info; - -/* ------------------ Begin Digi specific structures -------------------- */ - -/* - * digi_channels represents an array of structures that keep track of each - * channel of the Digi product. Information such as transmit and receive - * pointers, termio data, and signal definitions (DTR, CTS, etc ...) are stored - * here. This structure is NOT used to overlay the cards physical channel - * structure. - */ -static struct channel digi_channels[MAX_ALLOC]; - -/* - * card_ptr is an array used to hold the address of the first channel structure - * of each card. This array will hold the addresses of various channels located - * in digi_channels. - */ -static struct channel *card_ptr[MAXCARDS]; - -static struct timer_list epca_timer; - -/* - * Begin generic memory functions. These functions will be alias (point at) - * more specific functions dependent on the board being configured. - */ -static void memwinon(struct board_info *b, unsigned int win); -static void memwinoff(struct board_info *b, unsigned int win); -static void globalwinon(struct channel *ch); -static void rxwinon(struct channel *ch); -static void txwinon(struct channel *ch); -static void memoff(struct channel *ch); -static void assertgwinon(struct channel *ch); -static void assertmemoff(struct channel *ch); - -/* ---- Begin more 'specific' memory functions for cx_like products --- */ - -static void pcxem_memwinon(struct board_info *b, unsigned int win); -static void pcxem_memwinoff(struct board_info *b, unsigned int win); -static void pcxem_globalwinon(struct channel *ch); -static void pcxem_rxwinon(struct channel *ch); -static void pcxem_txwinon(struct channel *ch); -static void pcxem_memoff(struct channel *ch); - -/* ------ Begin more 'specific' memory functions for the pcxe ------- */ - -static void pcxe_memwinon(struct board_info *b, unsigned int win); -static void pcxe_memwinoff(struct board_info *b, unsigned int win); -static void pcxe_globalwinon(struct channel *ch); -static void pcxe_rxwinon(struct channel *ch); -static void pcxe_txwinon(struct channel *ch); -static void pcxe_memoff(struct channel *ch); - -/* ---- Begin more 'specific' memory functions for the pc64xe and pcxi ---- */ -/* Note : pc64xe and pcxi share the same windowing routines */ - -static void pcxi_memwinon(struct board_info *b, unsigned int win); -static void pcxi_memwinoff(struct board_info *b, unsigned int win); -static void pcxi_globalwinon(struct channel *ch); -static void pcxi_rxwinon(struct channel *ch); -static void pcxi_txwinon(struct channel *ch); -static void pcxi_memoff(struct channel *ch); - -/* - Begin 'specific' do nothing memory functions needed for some cards - */ - -static void dummy_memwinon(struct board_info *b, unsigned int win); -static void dummy_memwinoff(struct board_info *b, unsigned int win); -static void dummy_globalwinon(struct channel *ch); -static void dummy_rxwinon(struct channel *ch); -static void dummy_txwinon(struct channel *ch); -static void dummy_memoff(struct channel *ch); -static void dummy_assertgwinon(struct channel *ch); -static void dummy_assertmemoff(struct channel *ch); - -static struct channel *verifyChannel(struct tty_struct *); -static void pc_sched_event(struct channel *, int); -static void epca_error(int, char *); -static void pc_close(struct tty_struct *, struct file *); -static void shutdown(struct channel *, struct tty_struct *tty); -static void pc_hangup(struct tty_struct *); -static int pc_write_room(struct tty_struct *); -static int pc_chars_in_buffer(struct tty_struct *); -static void pc_flush_buffer(struct tty_struct *); -static void pc_flush_chars(struct tty_struct *); -static int pc_open(struct tty_struct *, struct file *); -static void post_fep_init(unsigned int crd); -static void epcapoll(unsigned long); -static void doevent(int); -static void fepcmd(struct channel *, int, int, int, int, int); -static unsigned termios2digi_h(struct channel *ch, unsigned); -static unsigned termios2digi_i(struct channel *ch, unsigned); -static unsigned termios2digi_c(struct channel *ch, unsigned); -static void epcaparam(struct tty_struct *, struct channel *); -static void receive_data(struct channel *, struct tty_struct *tty); -static int pc_ioctl(struct tty_struct *, struct file *, - unsigned int, unsigned long); -static int info_ioctl(struct tty_struct *, struct file *, - unsigned int, unsigned long); -static void pc_set_termios(struct tty_struct *, struct ktermios *); -static void do_softint(struct work_struct *work); -static void pc_stop(struct tty_struct *); -static void pc_start(struct tty_struct *); -static void pc_throttle(struct tty_struct *tty); -static void pc_unthrottle(struct tty_struct *tty); -static int pc_send_break(struct tty_struct *tty, int msec); -static void setup_empty_event(struct tty_struct *tty, struct channel *ch); - -static int pc_write(struct tty_struct *, const unsigned char *, int); -static int pc_init(void); -static int init_PCI(void); - -/* - * Table of functions for each board to handle memory. Mantaining parallelism - * is a *very* good idea here. The idea is for the runtime code to blindly call - * these functions, not knowing/caring about the underlying hardware. This - * stuff should contain no conditionals; if more functionality is needed a - * different entry should be established. These calls are the interface calls - * and are the only functions that should be accessed. Anyone caught making - * direct calls deserves what they get. - */ -static void memwinon(struct board_info *b, unsigned int win) -{ - b->memwinon(b, win); -} - -static void memwinoff(struct board_info *b, unsigned int win) -{ - b->memwinoff(b, win); -} - -static void globalwinon(struct channel *ch) -{ - ch->board->globalwinon(ch); -} - -static void rxwinon(struct channel *ch) -{ - ch->board->rxwinon(ch); -} - -static void txwinon(struct channel *ch) -{ - ch->board->txwinon(ch); -} - -static void memoff(struct channel *ch) -{ - ch->board->memoff(ch); -} -static void assertgwinon(struct channel *ch) -{ - ch->board->assertgwinon(ch); -} - -static void assertmemoff(struct channel *ch) -{ - ch->board->assertmemoff(ch); -} - -/* PCXEM windowing is the same as that used in the PCXR and CX series cards. */ -static void pcxem_memwinon(struct board_info *b, unsigned int win) -{ - outb_p(FEPWIN | win, b->port + 1); -} - -static void pcxem_memwinoff(struct board_info *b, unsigned int win) -{ - outb_p(0, b->port + 1); -} - -static void pcxem_globalwinon(struct channel *ch) -{ - outb_p(FEPWIN, (int)ch->board->port + 1); -} - -static void pcxem_rxwinon(struct channel *ch) -{ - outb_p(ch->rxwin, (int)ch->board->port + 1); -} - -static void pcxem_txwinon(struct channel *ch) -{ - outb_p(ch->txwin, (int)ch->board->port + 1); -} - -static void pcxem_memoff(struct channel *ch) -{ - outb_p(0, (int)ch->board->port + 1); -} - -/* ----------------- Begin pcxe memory window stuff ------------------ */ -static void pcxe_memwinon(struct board_info *b, unsigned int win) -{ - outb_p(FEPWIN | win, b->port + 1); -} - -static void pcxe_memwinoff(struct board_info *b, unsigned int win) -{ - outb_p(inb(b->port) & ~FEPMEM, b->port + 1); - outb_p(0, b->port + 1); -} - -static void pcxe_globalwinon(struct channel *ch) -{ - outb_p(FEPWIN, (int)ch->board->port + 1); -} - -static void pcxe_rxwinon(struct channel *ch) -{ - outb_p(ch->rxwin, (int)ch->board->port + 1); -} - -static void pcxe_txwinon(struct channel *ch) -{ - outb_p(ch->txwin, (int)ch->board->port + 1); -} - -static void pcxe_memoff(struct channel *ch) -{ - outb_p(0, (int)ch->board->port); - outb_p(0, (int)ch->board->port + 1); -} - -/* ------------- Begin pc64xe and pcxi memory window stuff -------------- */ -static void pcxi_memwinon(struct board_info *b, unsigned int win) -{ - outb_p(inb(b->port) | FEPMEM, b->port); -} - -static void pcxi_memwinoff(struct board_info *b, unsigned int win) -{ - outb_p(inb(b->port) & ~FEPMEM, b->port); -} - -static void pcxi_globalwinon(struct channel *ch) -{ - outb_p(FEPMEM, ch->board->port); -} - -static void pcxi_rxwinon(struct channel *ch) -{ - outb_p(FEPMEM, ch->board->port); -} - -static void pcxi_txwinon(struct channel *ch) -{ - outb_p(FEPMEM, ch->board->port); -} - -static void pcxi_memoff(struct channel *ch) -{ - outb_p(0, ch->board->port); -} - -static void pcxi_assertgwinon(struct channel *ch) -{ - epcaassert(inb(ch->board->port) & FEPMEM, "Global memory off"); -} - -static void pcxi_assertmemoff(struct channel *ch) -{ - epcaassert(!(inb(ch->board->port) & FEPMEM), "Memory on"); -} - -/* - * Not all of the cards need specific memory windowing routines. Some cards - * (Such as PCI) needs no windowing routines at all. We provide these do - * nothing routines so that the same code base can be used. The driver will - * ALWAYS call a windowing routine if it thinks it needs to; regardless of the - * card. However, dependent on the card the routine may or may not do anything. - */ -static void dummy_memwinon(struct board_info *b, unsigned int win) -{ -} - -static void dummy_memwinoff(struct board_info *b, unsigned int win) -{ -} - -static void dummy_globalwinon(struct channel *ch) -{ -} - -static void dummy_rxwinon(struct channel *ch) -{ -} - -static void dummy_txwinon(struct channel *ch) -{ -} - -static void dummy_memoff(struct channel *ch) -{ -} - -static void dummy_assertgwinon(struct channel *ch) -{ -} - -static void dummy_assertmemoff(struct channel *ch) -{ -} - -static struct channel *verifyChannel(struct tty_struct *tty) -{ - /* - * This routine basically provides a sanity check. It insures that the - * channel returned is within the proper range of addresses as well as - * properly initialized. If some bogus info gets passed in - * through tty->driver_data this should catch it. - */ - if (tty) { - struct channel *ch = tty->driver_data; - if (ch >= &digi_channels[0] && ch < &digi_channels[nbdevs]) { - if (ch->magic == EPCA_MAGIC) - return ch; - } - } - return NULL; -} - -static void pc_sched_event(struct channel *ch, int event) -{ - /* - * We call this to schedule interrupt processing on some event. The - * kernel sees our request and calls the related routine in OUR driver. - */ - ch->event |= 1 << event; - schedule_work(&ch->tqueue); -} - -static void epca_error(int line, char *msg) -{ - printk(KERN_ERR "epca_error (Digi): line = %d %s\n", line, msg); -} - -static void pc_close(struct tty_struct *tty, struct file *filp) -{ - struct channel *ch; - struct tty_port *port; - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch == NULL) - return; - port = &ch->port; - - if (tty_port_close_start(port, tty, filp) == 0) - return; - - pc_flush_buffer(tty); - shutdown(ch, tty); - - tty_port_close_end(port, tty); - ch->event = 0; /* FIXME: review ch->event locking */ - tty_port_tty_set(port, NULL); -} - -static void shutdown(struct channel *ch, struct tty_struct *tty) -{ - unsigned long flags; - struct board_chan __iomem *bc; - struct tty_port *port = &ch->port; - - if (!(port->flags & ASYNC_INITIALIZED)) - return; - - spin_lock_irqsave(&epca_lock, flags); - - globalwinon(ch); - bc = ch->brdchan; - - /* - * In order for an event to be generated on the receipt of data the - * idata flag must be set. Since we are shutting down, this is not - * necessary clear this flag. - */ - if (bc) - writeb(0, &bc->idata); - - /* If we're a modem control device and HUPCL is on, drop RTS & DTR. */ - if (tty->termios->c_cflag & HUPCL) { - ch->omodem &= ~(ch->m_rts | ch->m_dtr); - fepcmd(ch, SETMODEM, 0, ch->m_dtr | ch->m_rts, 10, 1); - } - memoff(ch); - - /* - * The channel has officialy been closed. The next time it is opened it - * will have to reinitialized. Set a flag to indicate this. - */ - /* Prevent future Digi programmed interrupts from coming active */ - port->flags &= ~ASYNC_INITIALIZED; - spin_unlock_irqrestore(&epca_lock, flags); -} - -static void pc_hangup(struct tty_struct *tty) -{ - struct channel *ch; - - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch != NULL) { - pc_flush_buffer(tty); - tty_ldisc_flush(tty); - shutdown(ch, tty); - - ch->event = 0; /* FIXME: review locking of ch->event */ - tty_port_hangup(&ch->port); - } -} - -static int pc_write(struct tty_struct *tty, - const unsigned char *buf, int bytesAvailable) -{ - unsigned int head, tail; - int dataLen; - int size; - int amountCopied; - struct channel *ch; - unsigned long flags; - int remain; - struct board_chan __iomem *bc; - - /* - * pc_write is primarily called directly by the kernel routine - * tty_write (Though it can also be called by put_char) found in - * tty_io.c. pc_write is passed a line discipline buffer where the data - * to be written out is stored. The line discipline implementation - * itself is done at the kernel level and is not brought into the - * driver. - */ - - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch == NULL) - return 0; - - /* Make a pointer to the channel data structure found on the board. */ - bc = ch->brdchan; - size = ch->txbufsize; - amountCopied = 0; - - spin_lock_irqsave(&epca_lock, flags); - globalwinon(ch); - - head = readw(&bc->tin) & (size - 1); - tail = readw(&bc->tout); - - if (tail != readw(&bc->tout)) - tail = readw(&bc->tout); - tail &= (size - 1); - - if (head >= tail) { - /* head has not wrapped */ - /* - * remain (much like dataLen above) represents the total amount - * of space available on the card for data. Here dataLen - * represents the space existing between the head pointer and - * the end of buffer. This is important because a memcpy cannot - * be told to automatically wrap around when it hits the buffer - * end. - */ - dataLen = size - head; - remain = size - (head - tail) - 1; - } else { - /* head has wrapped around */ - remain = tail - head - 1; - dataLen = remain; - } - /* - * Check the space on the card. If we have more data than space; reduce - * the amount of data to fit the space. - */ - bytesAvailable = min(remain, bytesAvailable); - txwinon(ch); - while (bytesAvailable > 0) { - /* there is data to copy onto card */ - - /* - * If head is not wrapped, the below will make sure the first - * data copy fills to the end of card buffer. - */ - dataLen = min(bytesAvailable, dataLen); - memcpy_toio(ch->txptr + head, buf, dataLen); - buf += dataLen; - head += dataLen; - amountCopied += dataLen; - bytesAvailable -= dataLen; - - if (head >= size) { - head = 0; - dataLen = tail; - } - } - ch->statusflags |= TXBUSY; - globalwinon(ch); - writew(head, &bc->tin); - - if ((ch->statusflags & LOWWAIT) == 0) { - ch->statusflags |= LOWWAIT; - writeb(1, &bc->ilow); - } - memoff(ch); - spin_unlock_irqrestore(&epca_lock, flags); - return amountCopied; -} - -static int pc_write_room(struct tty_struct *tty) -{ - int remain = 0; - struct channel *ch; - unsigned long flags; - unsigned int head, tail; - struct board_chan __iomem *bc; - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch != NULL) { - spin_lock_irqsave(&epca_lock, flags); - globalwinon(ch); - - bc = ch->brdchan; - head = readw(&bc->tin) & (ch->txbufsize - 1); - tail = readw(&bc->tout); - - if (tail != readw(&bc->tout)) - tail = readw(&bc->tout); - /* Wrap tail if necessary */ - tail &= (ch->txbufsize - 1); - remain = tail - head - 1; - if (remain < 0) - remain += ch->txbufsize; - - if (remain && (ch->statusflags & LOWWAIT) == 0) { - ch->statusflags |= LOWWAIT; - writeb(1, &bc->ilow); - } - memoff(ch); - spin_unlock_irqrestore(&epca_lock, flags); - } - /* Return how much room is left on card */ - return remain; -} - -static int pc_chars_in_buffer(struct tty_struct *tty) -{ - int chars; - unsigned int ctail, head, tail; - int remain; - unsigned long flags; - struct channel *ch; - struct board_chan __iomem *bc; - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch == NULL) - return 0; - - spin_lock_irqsave(&epca_lock, flags); - globalwinon(ch); - - bc = ch->brdchan; - tail = readw(&bc->tout); - head = readw(&bc->tin); - ctail = readw(&ch->mailbox->cout); - - if (tail == head && readw(&ch->mailbox->cin) == ctail && - readb(&bc->tbusy) == 0) - chars = 0; - else { /* Begin if some space on the card has been used */ - head = readw(&bc->tin) & (ch->txbufsize - 1); - tail &= (ch->txbufsize - 1); - /* - * The logic here is basically opposite of the above - * pc_write_room here we are finding the amount of bytes in the - * buffer filled. Not the amount of bytes empty. - */ - remain = tail - head - 1; - if (remain < 0) - remain += ch->txbufsize; - chars = (int)(ch->txbufsize - remain); - /* - * Make it possible to wakeup anything waiting for output in - * tty_ioctl.c, etc. - * - * If not already set. Setup an event to indicate when the - * transmit buffer empties. - */ - if (!(ch->statusflags & EMPTYWAIT)) - setup_empty_event(tty, ch); - } /* End if some space on the card has been used */ - memoff(ch); - spin_unlock_irqrestore(&epca_lock, flags); - /* Return number of characters residing on card. */ - return chars; -} - -static void pc_flush_buffer(struct tty_struct *tty) -{ - unsigned int tail; - unsigned long flags; - struct channel *ch; - struct board_chan __iomem *bc; - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch == NULL) - return; - - spin_lock_irqsave(&epca_lock, flags); - globalwinon(ch); - bc = ch->brdchan; - tail = readw(&bc->tout); - /* Have FEP move tout pointer; effectively flushing transmit buffer */ - fepcmd(ch, STOUT, (unsigned) tail, 0, 0, 0); - memoff(ch); - spin_unlock_irqrestore(&epca_lock, flags); - tty_wakeup(tty); -} - -static void pc_flush_chars(struct tty_struct *tty) -{ - struct channel *ch; - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch != NULL) { - unsigned long flags; - spin_lock_irqsave(&epca_lock, flags); - /* - * If not already set and the transmitter is busy setup an - * event to indicate when the transmit empties. - */ - if ((ch->statusflags & TXBUSY) && - !(ch->statusflags & EMPTYWAIT)) - setup_empty_event(tty, ch); - spin_unlock_irqrestore(&epca_lock, flags); - } -} - -static int epca_carrier_raised(struct tty_port *port) -{ - struct channel *ch = container_of(port, struct channel, port); - if (ch->imodem & ch->dcd) - return 1; - return 0; -} - -static void epca_dtr_rts(struct tty_port *port, int onoff) -{ -} - -static int pc_open(struct tty_struct *tty, struct file *filp) -{ - struct channel *ch; - struct tty_port *port; - unsigned long flags; - int line, retval, boardnum; - struct board_chan __iomem *bc; - unsigned int head; - - line = tty->index; - if (line < 0 || line >= nbdevs) - return -ENODEV; - - ch = &digi_channels[line]; - port = &ch->port; - boardnum = ch->boardnum; - - /* Check status of board configured in system. */ - - /* - * I check to see if the epca_setup routine detected a user error. It - * might be better to put this in pc_init, but for the moment it goes - * here. - */ - if (invalid_lilo_config) { - if (setup_error_code & INVALID_BOARD_TYPE) - printk(KERN_ERR "epca: pc_open: Invalid board type specified in kernel options.\n"); - if (setup_error_code & INVALID_NUM_PORTS) - printk(KERN_ERR "epca: pc_open: Invalid number of ports specified in kernel options.\n"); - if (setup_error_code & INVALID_MEM_BASE) - printk(KERN_ERR "epca: pc_open: Invalid board memory address specified in kernel options.\n"); - if (setup_error_code & INVALID_PORT_BASE) - printk(KERN_ERR "epca; pc_open: Invalid board port address specified in kernel options.\n"); - if (setup_error_code & INVALID_BOARD_STATUS) - printk(KERN_ERR "epca: pc_open: Invalid board status specified in kernel options.\n"); - if (setup_error_code & INVALID_ALTPIN) - printk(KERN_ERR "epca: pc_open: Invalid board altpin specified in kernel options;\n"); - tty->driver_data = NULL; /* Mark this device as 'down' */ - return -ENODEV; - } - if (boardnum >= num_cards || boards[boardnum].status == DISABLED) { - tty->driver_data = NULL; /* Mark this device as 'down' */ - return(-ENODEV); - } - - bc = ch->brdchan; - if (bc == NULL) { - tty->driver_data = NULL; - return -ENODEV; - } - - spin_lock_irqsave(&port->lock, flags); - /* - * Every time a channel is opened, increment a counter. This is - * necessary because we do not wish to flush and shutdown the channel - * until the last app holding the channel open, closes it. - */ - port->count++; - /* - * Set a kernel structures pointer to our local channel structure. This - * way we can get to it when passed only a tty struct. - */ - tty->driver_data = ch; - port->tty = tty; - /* - * If this is the first time the channel has been opened, initialize - * the tty->termios struct otherwise let pc_close handle it. - */ - spin_lock(&epca_lock); - globalwinon(ch); - ch->statusflags = 0; - - /* Save boards current modem status */ - ch->imodem = readb(&bc->mstat); - - /* - * Set receive head and tail ptrs to each other. This indicates no data - * available to read. - */ - head = readw(&bc->rin); - writew(head, &bc->rout); - - /* Set the channels associated tty structure */ - - /* - * The below routine generally sets up parity, baud, flow control - * issues, etc.... It effect both control flags and input flags. - */ - epcaparam(tty, ch); - memoff(ch); - spin_unlock(&epca_lock); - port->flags |= ASYNC_INITIALIZED; - spin_unlock_irqrestore(&port->lock, flags); - - retval = tty_port_block_til_ready(port, tty, filp); - if (retval) - return retval; - /* - * Set this again in case a hangup set it to zero while this open() was - * waiting for the line... - */ - spin_lock_irqsave(&port->lock, flags); - port->tty = tty; - spin_lock(&epca_lock); - globalwinon(ch); - /* Enable Digi Data events */ - writeb(1, &bc->idata); - memoff(ch); - spin_unlock(&epca_lock); - spin_unlock_irqrestore(&port->lock, flags); - return 0; -} - -static int __init epca_module_init(void) -{ - return pc_init(); -} -module_init(epca_module_init); - -static struct pci_driver epca_driver; - -static void __exit epca_module_exit(void) -{ - int count, crd; - struct board_info *bd; - struct channel *ch; - - del_timer_sync(&epca_timer); - - if (tty_unregister_driver(pc_driver) || - tty_unregister_driver(pc_info)) { - printk(KERN_WARNING "epca: cleanup_module failed to un-register tty driver\n"); - return; - } - put_tty_driver(pc_driver); - put_tty_driver(pc_info); - - for (crd = 0; crd < num_cards; crd++) { - bd = &boards[crd]; - if (!bd) { /* sanity check */ - printk(KERN_ERR "<Error> - Digi : cleanup_module failed\n"); - return; - } - ch = card_ptr[crd]; - for (count = 0; count < bd->numports; count++, ch++) { - struct tty_struct *tty = tty_port_tty_get(&ch->port); - if (tty) { - tty_hangup(tty); - tty_kref_put(tty); - } - } - } - pci_unregister_driver(&epca_driver); -} -module_exit(epca_module_exit); - -static const struct tty_operations pc_ops = { - .open = pc_open, - .close = pc_close, - .write = pc_write, - .write_room = pc_write_room, - .flush_buffer = pc_flush_buffer, - .chars_in_buffer = pc_chars_in_buffer, - .flush_chars = pc_flush_chars, - .ioctl = pc_ioctl, - .set_termios = pc_set_termios, - .stop = pc_stop, - .start = pc_start, - .throttle = pc_throttle, - .unthrottle = pc_unthrottle, - .hangup = pc_hangup, - .break_ctl = pc_send_break -}; - -static const struct tty_port_operations epca_port_ops = { - .carrier_raised = epca_carrier_raised, - .dtr_rts = epca_dtr_rts, -}; - -static int info_open(struct tty_struct *tty, struct file *filp) -{ - return 0; -} - -static const struct tty_operations info_ops = { - .open = info_open, - .ioctl = info_ioctl, -}; - -static int __init pc_init(void) -{ - int crd; - struct board_info *bd; - unsigned char board_id = 0; - int err = -ENOMEM; - - int pci_boards_found, pci_count; - - pci_count = 0; - - pc_driver = alloc_tty_driver(MAX_ALLOC); - if (!pc_driver) - goto out1; - - pc_info = alloc_tty_driver(MAX_ALLOC); - if (!pc_info) - goto out2; - - /* - * If epca_setup has not been ran by LILO set num_cards to defaults; - * copy board structure defined by digiConfig into drivers board - * structure. Note : If LILO has ran epca_setup then epca_setup will - * handle defining num_cards as well as copying the data into the board - * structure. - */ - if (!liloconfig) { - /* driver has been configured via. epcaconfig */ - nbdevs = NBDEVS; - num_cards = NUMCARDS; - memcpy(&boards, &static_boards, - sizeof(struct board_info) * NUMCARDS); - } - - /* - * Note : If lilo was used to configure the driver and the ignore - * epcaconfig option was choosen (digiepca=2) then nbdevs and num_cards - * will equal 0 at this point. This is okay; PCI cards will still be - * picked up if detected. - */ - - /* - * Set up interrupt, we will worry about memory allocation in - * post_fep_init. - */ - printk(KERN_INFO "DIGI epca driver version %s loaded.\n", VERSION); - - /* - * NOTE : This code assumes that the number of ports found in the - * boards array is correct. This could be wrong if the card in question - * is PCI (And therefore has no ports entry in the boards structure.) - * The rest of the information will be valid for PCI because the - * beginning of pc_init scans for PCI and determines i/o and base - * memory addresses. I am not sure if it is possible to read the number - * of ports supported by the card prior to it being booted (Since that - * is the state it is in when pc_init is run). Because it is not - * possible to query the number of supported ports until after the card - * has booted; we are required to calculate the card_ptrs as the card - * is initialized (Inside post_fep_init). The negative thing about this - * approach is that digiDload's call to GET_INFO will have a bad port - * value. (Since this is called prior to post_fep_init.) - */ - pci_boards_found = 0; - if (num_cards < MAXBOARDS) - pci_boards_found += init_PCI(); - num_cards += pci_boards_found; - - pc_driver->owner = THIS_MODULE; - pc_driver->name = "ttyD"; - pc_driver->major = DIGI_MAJOR; - pc_driver->minor_start = 0; - pc_driver->type = TTY_DRIVER_TYPE_SERIAL; - pc_driver->subtype = SERIAL_TYPE_NORMAL; - pc_driver->init_termios = tty_std_termios; - pc_driver->init_termios.c_iflag = 0; - pc_driver->init_termios.c_oflag = 0; - pc_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; - pc_driver->init_termios.c_lflag = 0; - pc_driver->init_termios.c_ispeed = 9600; - pc_driver->init_termios.c_ospeed = 9600; - pc_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_HARDWARE_BREAK; - tty_set_operations(pc_driver, &pc_ops); - - pc_info->owner = THIS_MODULE; - pc_info->name = "digi_ctl"; - pc_info->major = DIGIINFOMAJOR; - pc_info->minor_start = 0; - pc_info->type = TTY_DRIVER_TYPE_SERIAL; - pc_info->subtype = SERIAL_TYPE_INFO; - pc_info->init_termios = tty_std_termios; - pc_info->init_termios.c_iflag = 0; - pc_info->init_termios.c_oflag = 0; - pc_info->init_termios.c_lflag = 0; - pc_info->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL; - pc_info->init_termios.c_ispeed = 9600; - pc_info->init_termios.c_ospeed = 9600; - pc_info->flags = TTY_DRIVER_REAL_RAW; - tty_set_operations(pc_info, &info_ops); - - - for (crd = 0; crd < num_cards; crd++) { - /* - * This is where the appropriate memory handlers for the - * hardware is set. Everything at runtime blindly jumps through - * these vectors. - */ - - /* defined in epcaconfig.h */ - bd = &boards[crd]; - - switch (bd->type) { - case PCXEM: - case EISAXEM: - bd->memwinon = pcxem_memwinon; - bd->memwinoff = pcxem_memwinoff; - bd->globalwinon = pcxem_globalwinon; - bd->txwinon = pcxem_txwinon; - bd->rxwinon = pcxem_rxwinon; - bd->memoff = pcxem_memoff; - bd->assertgwinon = dummy_assertgwinon; - bd->assertmemoff = dummy_assertmemoff; - break; - - case PCIXEM: - case PCIXRJ: - case PCIXR: - bd->memwinon = dummy_memwinon; - bd->memwinoff = dummy_memwinoff; - bd->globalwinon = dummy_globalwinon; - bd->txwinon = dummy_txwinon; - bd->rxwinon = dummy_rxwinon; - bd->memoff = dummy_memoff; - bd->assertgwinon = dummy_assertgwinon; - bd->assertmemoff = dummy_assertmemoff; - break; - - case PCXE: - case PCXEVE: - bd->memwinon = pcxe_memwinon; - bd->memwinoff = pcxe_memwinoff; - bd->globalwinon = pcxe_globalwinon; - bd->txwinon = pcxe_txwinon; - bd->rxwinon = pcxe_rxwinon; - bd->memoff = pcxe_memoff; - bd->assertgwinon = dummy_assertgwinon; - bd->assertmemoff = dummy_assertmemoff; - break; - - case PCXI: - case PC64XE: - bd->memwinon = pcxi_memwinon; - bd->memwinoff = pcxi_memwinoff; - bd->globalwinon = pcxi_globalwinon; - bd->txwinon = pcxi_txwinon; - bd->rxwinon = pcxi_rxwinon; - bd->memoff = pcxi_memoff; - bd->assertgwinon = pcxi_assertgwinon; - bd->assertmemoff = pcxi_assertmemoff; - break; - - default: - break; - } - - /* - * Some cards need a memory segment to be defined for use in - * transmit and receive windowing operations. These boards are - * listed in the below switch. In the case of the XI the amount - * of memory on the board is variable so the memory_seg is also - * variable. This code determines what they segment should be. - */ - switch (bd->type) { - case PCXE: - case PCXEVE: - case PC64XE: - bd->memory_seg = 0xf000; - break; - - case PCXI: - board_id = inb((int)bd->port); - if ((board_id & 0x1) == 0x1) { - /* it's an XI card */ - /* Is it a 64K board */ - if ((board_id & 0x30) == 0) - bd->memory_seg = 0xf000; - - /* Is it a 128K board */ - if ((board_id & 0x30) == 0x10) - bd->memory_seg = 0xe000; - - /* Is is a 256K board */ - if ((board_id & 0x30) == 0x20) - bd->memory_seg = 0xc000; - - /* Is it a 512K board */ - if ((board_id & 0x30) == 0x30) - bd->memory_seg = 0x8000; - } else - printk(KERN_ERR "epca: Board at 0x%x doesn't appear to be an XI\n", (int)bd->port); - break; - } - } - - err = tty_register_driver(pc_driver); - if (err) { - printk(KERN_ERR "Couldn't register Digi PC/ driver"); - goto out3; - } - - err = tty_register_driver(pc_info); - if (err) { - printk(KERN_ERR "Couldn't register Digi PC/ info "); - goto out4; - } - - /* Start up the poller to check for events on all enabled boards */ - init_timer(&epca_timer); - epca_timer.function = epcapoll; - mod_timer(&epca_timer, jiffies + HZ/25); - return 0; - -out4: - tty_unregister_driver(pc_driver); -out3: - put_tty_driver(pc_info); -out2: - put_tty_driver(pc_driver); -out1: - return err; -} - -static void post_fep_init(unsigned int crd) -{ - int i; - void __iomem *memaddr; - struct global_data __iomem *gd; - struct board_info *bd; - struct board_chan __iomem *bc; - struct channel *ch; - int shrinkmem = 0, lowwater; - - /* - * This call is made by the user via. the ioctl call DIGI_INIT. It is - * responsible for setting up all the card specific stuff. - */ - bd = &boards[crd]; - - /* - * If this is a PCI board, get the port info. Remember PCI cards do not - * have entries into the epcaconfig.h file, so we can't get the number - * of ports from it. Unfortunetly, this means that anyone doing a - * DIGI_GETINFO before the board has booted will get an invalid number - * of ports returned (It should return 0). Calls to DIGI_GETINFO after - * DIGI_INIT has been called will return the proper values. - */ - if (bd->type >= PCIXEM) { /* Begin get PCI number of ports */ - /* - * Below we use XEMPORTS as a memory offset regardless of which - * PCI card it is. This is because all of the supported PCI - * cards have the same memory offset for the channel data. This - * will have to be changed if we ever develop a PCI/XE card. - * NOTE : The FEP manual states that the port offset is 0xC22 - * as opposed to 0xC02. This is only true for PC/XE, and PC/XI - * cards; not for the XEM, or CX series. On the PCI cards the - * number of ports is determined by reading a ID PROM located - * in the box attached to the card. The card can then determine - * the index the id to determine the number of ports available. - * (FYI - The id should be located at 0x1ac (And may use up to - * 4 bytes if the box in question is a XEM or CX)). - */ - /* PCI cards are already remapped at this point ISA are not */ - bd->numports = readw(bd->re_map_membase + XEMPORTS); - epcaassert(bd->numports <= 64, "PCI returned a invalid number of ports"); - nbdevs += (bd->numports); - } else { - /* Fix up the mappings for ISA/EISA etc */ - /* FIXME: 64K - can we be smarter ? */ - bd->re_map_membase = ioremap_nocache(bd->membase, 0x10000); - } - - if (crd != 0) - card_ptr[crd] = card_ptr[crd-1] + boards[crd-1].numports; - else - card_ptr[crd] = &digi_channels[crd]; /* <- For card 0 only */ - - ch = card_ptr[crd]; - epcaassert(ch <= &digi_channels[nbdevs - 1], "ch out of range"); - - memaddr = bd->re_map_membase; - - /* - * The below assignment will set bc to point at the BEGINING of the - * cards channel structures. For 1 card there will be between 8 and 64 - * of these structures. - */ - bc = memaddr + CHANSTRUCT; - - /* - * The below assignment will set gd to point at the BEGINING of global - * memory address 0xc00. The first data in that global memory actually - * starts at address 0xc1a. The command in pointer begins at 0xd10. - */ - gd = memaddr + GLOBAL; - - /* - * XEPORTS (address 0xc22) points at the number of channels the card - * supports. (For 64XE, XI, XEM, and XR use 0xc02) - */ - if ((bd->type == PCXEVE || bd->type == PCXE) && - (readw(memaddr + XEPORTS) < 3)) - shrinkmem = 1; - if (bd->type < PCIXEM) - if (!request_region((int)bd->port, 4, board_desc[bd->type])) - return; - memwinon(bd, 0); - - /* - * Remember ch is the main drivers channels structure, while bc is the - * cards channel structure. - */ - for (i = 0; i < bd->numports; i++, ch++, bc++) { - unsigned long flags; - u16 tseg, rseg; - - tty_port_init(&ch->port); - ch->port.ops = &epca_port_ops; - ch->brdchan = bc; - ch->mailbox = gd; - INIT_WORK(&ch->tqueue, do_softint); - ch->board = &boards[crd]; - - spin_lock_irqsave(&epca_lock, flags); - switch (bd->type) { - /* - * Since some of the boards use different bitmaps for - * their control signals we cannot hard code these - * values and retain portability. We virtualize this - * data here. - */ - case EISAXEM: - case PCXEM: - case PCIXEM: - case PCIXRJ: - case PCIXR: - ch->m_rts = 0x02; - ch->m_dcd = 0x80; - ch->m_dsr = 0x20; - ch->m_cts = 0x10; - ch->m_ri = 0x40; - ch->m_dtr = 0x01; - break; - - case PCXE: - case PCXEVE: - case PCXI: - case PC64XE: - ch->m_rts = 0x02; - ch->m_dcd = 0x08; - ch->m_dsr = 0x10; - ch->m_cts = 0x20; - ch->m_ri = 0x40; - ch->m_dtr = 0x80; - break; - } - - if (boards[crd].altpin) { - ch->dsr = ch->m_dcd; - ch->dcd = ch->m_dsr; - ch->digiext.digi_flags |= DIGI_ALTPIN; - } else { - ch->dcd = ch->m_dcd; - ch->dsr = ch->m_dsr; - } - - ch->boardnum = crd; - ch->channelnum = i; - ch->magic = EPCA_MAGIC; - tty_port_tty_set(&ch->port, NULL); - - if (shrinkmem) { - fepcmd(ch, SETBUFFER, 32, 0, 0, 0); - shrinkmem = 0; - } - - tseg = readw(&bc->tseg); - rseg = readw(&bc->rseg); - - switch (bd->type) { - case PCIXEM: - case PCIXRJ: - case PCIXR: - /* Cover all the 2MEG cards */ - ch->txptr = memaddr + ((tseg << 4) & 0x1fffff); - ch->rxptr = memaddr + ((rseg << 4) & 0x1fffff); - ch->txwin = FEPWIN | (tseg >> 11); - ch->rxwin = FEPWIN | (rseg >> 11); - break; - - case PCXEM: - case EISAXEM: - /* Cover all the 32K windowed cards */ - /* Mask equal to window size - 1 */ - ch->txptr = memaddr + ((tseg << 4) & 0x7fff); - ch->rxptr = memaddr + ((rseg << 4) & 0x7fff); - ch->txwin = FEPWIN | (tseg >> 11); - ch->rxwin = FEPWIN | (rseg >> 11); - break; - - case PCXEVE: - case PCXE: - ch->txptr = memaddr + (((tseg - bd->memory_seg) << 4) - & 0x1fff); - ch->txwin = FEPWIN | ((tseg - bd->memory_seg) >> 9); - ch->rxptr = memaddr + (((rseg - bd->memory_seg) << 4) - & 0x1fff); - ch->rxwin = FEPWIN | ((rseg - bd->memory_seg) >> 9); - break; - - case PCXI: - case PC64XE: - ch->txptr = memaddr + ((tseg - bd->memory_seg) << 4); - ch->rxptr = memaddr + ((rseg - bd->memory_seg) << 4); - ch->txwin = ch->rxwin = 0; - break; - } - - ch->txbufhead = 0; - ch->txbufsize = readw(&bc->tmax) + 1; - - ch->rxbufhead = 0; - ch->rxbufsize = readw(&bc->rmax) + 1; - - lowwater = ch->txbufsize >= 2000 ? 1024 : (ch->txbufsize / 2); - - /* Set transmitter low water mark */ - fepcmd(ch, STXLWATER, lowwater, 0, 10, 0); - - /* Set receiver low water mark */ - fepcmd(ch, SRXLWATER, (ch->rxbufsize / 4), 0, 10, 0); - - /* Set receiver high water mark */ - fepcmd(ch, SRXHWATER, (3 * ch->rxbufsize / 4), 0, 10, 0); - - writew(100, &bc->edelay); - writeb(1, &bc->idata); - - ch->startc = readb(&bc->startc); - ch->stopc = readb(&bc->stopc); - ch->startca = readb(&bc->startca); - ch->stopca = readb(&bc->stopca); - - ch->fepcflag = 0; - ch->fepiflag = 0; - ch->fepoflag = 0; - ch->fepstartc = 0; - ch->fepstopc = 0; - ch->fepstartca = 0; - ch->fepstopca = 0; - - ch->port.close_delay = 50; - - spin_unlock_irqrestore(&epca_lock, flags); - } - - printk(KERN_INFO - "Digi PC/Xx Driver V%s: %s I/O = 0x%lx Mem = 0x%lx Ports = %d\n", - VERSION, board_desc[bd->type], (long)bd->port, - (long)bd->membase, bd->numports); - memwinoff(bd, 0); -} - -static void epcapoll(unsigned long ignored) -{ - unsigned long flags; - int crd; - unsigned int head, tail; - struct channel *ch; - struct board_info *bd; - - /* - * This routine is called upon every timer interrupt. Even though the - * Digi series cards are capable of generating interrupts this method - * of non-looping polling is more efficient. This routine checks for - * card generated events (Such as receive data, are transmit buffer - * empty) and acts on those events. - */ - for (crd = 0; crd < num_cards; crd++) { - bd = &boards[crd]; - ch = card_ptr[crd]; - - if ((bd->status == DISABLED) || digi_poller_inhibited) - continue; - - /* - * assertmemoff is not needed here; indeed it is an empty - * subroutine. It is being kept because future boards may need - * this as well as some legacy boards. - */ - spin_lock_irqsave(&epca_lock, flags); - - assertmemoff(ch); - - globalwinon(ch); - - /* - * In this case head and tail actually refer to the event queue - * not the transmit or receive queue. - */ - head = readw(&ch->mailbox->ein); - tail = readw(&ch->mailbox->eout); - - /* If head isn't equal to tail we have an event */ - if (head != tail) - doevent(crd); - memoff(ch); - - spin_unlock_irqrestore(&epca_lock, flags); - } /* End for each card */ - mod_timer(&epca_timer, jiffies + (HZ / 25)); -} - -static void doevent(int crd) -{ - void __iomem *eventbuf; - struct channel *ch, *chan0; - static struct tty_struct *tty; - struct board_info *bd; - struct board_chan __iomem *bc; - unsigned int tail, head; - int event, channel; - int mstat, lstat; - - /* - * This subroutine is called by epcapoll when an event is detected - * in the event queue. This routine responds to those events. - */ - bd = &boards[crd]; - - chan0 = card_ptr[crd]; - epcaassert(chan0 <= &digi_channels[nbdevs - 1], "ch out of range"); - assertgwinon(chan0); - while ((tail = readw(&chan0->mailbox->eout)) != - (head = readw(&chan0->mailbox->ein))) { - /* Begin while something in event queue */ - assertgwinon(chan0); - eventbuf = bd->re_map_membase + tail + ISTART; - /* Get the channel the event occurred on */ - channel = readb(eventbuf); - /* Get the actual event code that occurred */ - event = readb(eventbuf + 1); - /* - * The two assignments below get the current modem status - * (mstat) and the previous modem status (lstat). These are - * useful becuase an event could signal a change in modem - * signals itself. - */ - mstat = readb(eventbuf + 2); - lstat = readb(eventbuf + 3); - - ch = chan0 + channel; - if ((unsigned)channel >= bd->numports || !ch) { - if (channel >= bd->numports) - ch = chan0; - bc = ch->brdchan; - goto next; - } - - bc = ch->brdchan; - if (bc == NULL) - goto next; - - tty = tty_port_tty_get(&ch->port); - if (event & DATA_IND) { /* Begin DATA_IND */ - receive_data(ch, tty); - assertgwinon(ch); - } /* End DATA_IND */ - /* else *//* Fix for DCD transition missed bug */ - if (event & MODEMCHG_IND) { - /* A modem signal change has been indicated */ - ch->imodem = mstat; - if (test_bit(ASYNCB_CHECK_CD, &ch->port.flags)) { - /* We are now receiving dcd */ - if (mstat & ch->dcd) - wake_up_interruptible(&ch->port.open_wait); - else /* No dcd; hangup */ - pc_sched_event(ch, EPCA_EVENT_HANGUP); - } - } - if (tty) { - if (event & BREAK_IND) { - /* A break has been indicated */ - tty_insert_flip_char(tty, 0, TTY_BREAK); - tty_schedule_flip(tty); - } else if (event & LOWTX_IND) { - if (ch->statusflags & LOWWAIT) { - ch->statusflags &= ~LOWWAIT; - tty_wakeup(tty); - } - } else if (event & EMPTYTX_IND) { - /* This event is generated by - setup_empty_event */ - ch->statusflags &= ~TXBUSY; - if (ch->statusflags & EMPTYWAIT) { - ch->statusflags &= ~EMPTYWAIT; - tty_wakeup(tty); - } - } - tty_kref_put(tty); - } -next: - globalwinon(ch); - BUG_ON(!bc); - writew(1, &bc->idata); - writew((tail + 4) & (IMAX - ISTART - 4), &chan0->mailbox->eout); - globalwinon(chan0); - } /* End while something in event queue */ -} - -static void fepcmd(struct channel *ch, int cmd, int word_or_byte, - int byte2, int ncmds, int bytecmd) -{ - unchar __iomem *memaddr; - unsigned int head, cmdTail, cmdStart, cmdMax; - long count; - int n; - - /* This is the routine in which commands may be passed to the card. */ - - if (ch->board->status == DISABLED) - return; - assertgwinon(ch); - /* Remember head (As well as max) is just an offset not a base addr */ - head = readw(&ch->mailbox->cin); - /* cmdStart is a base address */ - cmdStart = readw(&ch->mailbox->cstart); - /* - * We do the addition below because we do not want a max pointer - * relative to cmdStart. We want a max pointer that points at the - * physical end of the command queue. - */ - cmdMax = (cmdStart + 4 + readw(&ch->mailbox->cmax)); - memaddr = ch->board->re_map_membase; - - if (head >= (cmdMax - cmdStart) || (head & 03)) { - printk(KERN_ERR "line %d: Out of range, cmd = %x, head = %x\n", - __LINE__, cmd, head); - printk(KERN_ERR "line %d: Out of range, cmdMax = %x, cmdStart = %x\n", - __LINE__, cmdMax, cmdStart); - return; - } - if (bytecmd) { - writeb(cmd, memaddr + head + cmdStart + 0); - writeb(ch->channelnum, memaddr + head + cmdStart + 1); - /* Below word_or_byte is bits to set */ - writeb(word_or_byte, memaddr + head + cmdStart + 2); - /* Below byte2 is bits to reset */ - writeb(byte2, memaddr + head + cmdStart + 3); - } else { - writeb(cmd, memaddr + head + cmdStart + 0); - writeb(ch->channelnum, memaddr + head + cmdStart + 1); - writeb(word_or_byte, memaddr + head + cmdStart + 2); - } - head = (head + 4) & (cmdMax - cmdStart - 4); - writew(head, &ch->mailbox->cin); - count = FEPTIMEOUT; - - for (;;) { - count--; - if (count == 0) { - printk(KERN_ERR "<Error> - Fep not responding in fepcmd()\n"); - return; - } - head = readw(&ch->mailbox->cin); - cmdTail = readw(&ch->mailbox->cout); - n = (head - cmdTail) & (cmdMax - cmdStart - 4); - /* - * Basically this will break when the FEP acknowledges the - * command by incrementing cmdTail (Making it equal to head). - */ - if (n <= ncmds * (sizeof(short) * 4)) - break; - } -} - -/* - * Digi products use fields in their channels structures that are very similar - * to the c_cflag and c_iflag fields typically found in UNIX termios - * structures. The below three routines allow mappings between these hardware - * "flags" and their respective Linux flags. - */ -static unsigned termios2digi_h(struct channel *ch, unsigned cflag) -{ - unsigned res = 0; - - if (cflag & CRTSCTS) { - ch->digiext.digi_flags |= (RTSPACE | CTSPACE); - res |= ((ch->m_cts) | (ch->m_rts)); - } - - if (ch->digiext.digi_flags & RTSPACE) - res |= ch->m_rts; - - if (ch->digiext.digi_flags & DTRPACE) - res |= ch->m_dtr; - - if (ch->digiext.digi_flags & CTSPACE) - res |= ch->m_cts; - - if (ch->digiext.digi_flags & DSRPACE) - res |= ch->dsr; - - if (ch->digiext.digi_flags & DCDPACE) - res |= ch->dcd; - - if (res & (ch->m_rts)) - ch->digiext.digi_flags |= RTSPACE; - - if (res & (ch->m_cts)) - ch->digiext.digi_flags |= CTSPACE; - - return res; -} - -static unsigned termios2digi_i(struct channel *ch, unsigned iflag) -{ - unsigned res = iflag & (IGNBRK | BRKINT | IGNPAR | PARMRK | - INPCK | ISTRIP | IXON | IXANY | IXOFF); - if (ch->digiext.digi_flags & DIGI_AIXON) - res |= IAIXON; - return res; -} - -static unsigned termios2digi_c(struct channel *ch, unsigned cflag) -{ - unsigned res = 0; - if (cflag & CBAUDEX) { - ch->digiext.digi_flags |= DIGI_FAST; - /* - * HUPCL bit is used by FEP to indicate fast baud table is to - * be used. - */ - res |= FEP_HUPCL; - } else - ch->digiext.digi_flags &= ~DIGI_FAST; - /* - * CBAUD has bit position 0x1000 set these days to indicate Linux - * baud rate remap. Digi hardware can't handle the bit assignment. - * (We use a different bit assignment for high speed.). Clear this - * bit out. - */ - res |= cflag & ((CBAUD ^ CBAUDEX) | PARODD | PARENB | CSTOPB | CSIZE); - /* - * This gets a little confusing. The Digi cards have their own - * representation of c_cflags controlling baud rate. For the most part - * this is identical to the Linux implementation. However; Digi - * supports one rate (76800) that Linux doesn't. This means that the - * c_cflag entry that would normally mean 76800 for Digi actually means - * 115200 under Linux. Without the below mapping, a stty 115200 would - * only drive the board at 76800. Since the rate 230400 is also found - * after 76800, the same problem afflicts us when we choose a rate of - * 230400. Without the below modificiation stty 230400 would actually - * give us 115200. - * - * There are two additional differences. The Linux value for CLOCAL - * (0x800; 0004000) has no meaning to the Digi hardware. Also in later - * releases of Linux; the CBAUD define has CBAUDEX (0x1000; 0010000) - * ored into it (CBAUD = 0x100f as opposed to 0xf). CBAUDEX should be - * checked for a screened out prior to termios2digi_c returning. Since - * CLOCAL isn't used by the board this can be ignored as long as the - * returned value is used only by Digi hardware. - */ - if (cflag & CBAUDEX) { - /* - * The below code is trying to guarantee that only baud rates - * 115200 and 230400 are remapped. We use exclusive or because - * the various baud rates share common bit positions and - * therefore can't be tested for easily. - */ - if ((!((cflag & 0x7) ^ (B115200 & ~CBAUDEX))) || - (!((cflag & 0x7) ^ (B230400 & ~CBAUDEX)))) - res += 1; - } - return res; -} - -/* Caller must hold the locks */ -static void epcaparam(struct tty_struct *tty, struct channel *ch) -{ - unsigned int cmdHead; - struct ktermios *ts; - struct board_chan __iomem *bc; - unsigned mval, hflow, cflag, iflag; - - bc = ch->brdchan; - epcaassert(bc != NULL, "bc out of range"); - - assertgwinon(ch); - ts = tty->termios; - if ((ts->c_cflag & CBAUD) == 0) { /* Begin CBAUD detected */ - cmdHead = readw(&bc->rin); - writew(cmdHead, &bc->rout); - cmdHead = readw(&bc->tin); - /* Changing baud in mid-stream transmission can be wonderful */ - /* - * Flush current transmit buffer by setting cmdTail pointer - * (tout) to cmdHead pointer (tin). Hopefully the transmit - * buffer is empty. - */ - fepcmd(ch, STOUT, (unsigned) cmdHead, 0, 0, 0); - mval = 0; - } else { /* Begin CBAUD not detected */ - /* - * c_cflags have changed but that change had nothing to do with - * BAUD. Propagate the change to the card. - */ - cflag = termios2digi_c(ch, ts->c_cflag); - if (cflag != ch->fepcflag) { - ch->fepcflag = cflag; - /* Set baud rate, char size, stop bits, parity */ - fepcmd(ch, SETCTRLFLAGS, (unsigned) cflag, 0, 0, 0); - } - /* - * If the user has not forced CLOCAL and if the device is not a - * CALLOUT device (Which is always CLOCAL) we set flags such - * that the driver will wait on carrier detect. - */ - if (ts->c_cflag & CLOCAL) - clear_bit(ASYNCB_CHECK_CD, &ch->port.flags); - else - set_bit(ASYNCB_CHECK_CD, &ch->port.flags); - mval = ch->m_dtr | ch->m_rts; - } /* End CBAUD not detected */ - iflag = termios2digi_i(ch, ts->c_iflag); - /* Check input mode flags */ - if (iflag != ch->fepiflag) { - ch->fepiflag = iflag; - /* - * Command sets channels iflag structure on the board. Such - * things as input soft flow control, handling of parity - * errors, and break handling are all set here. - * - * break handling, parity handling, input stripping, - * flow control chars - */ - fepcmd(ch, SETIFLAGS, (unsigned int) ch->fepiflag, 0, 0, 0); - } - /* - * Set the board mint value for this channel. This will cause hardware - * events to be generated each time the DCD signal (Described in mint) - * changes. - */ - writeb(ch->dcd, &bc->mint); - if ((ts->c_cflag & CLOCAL) || (ch->digiext.digi_flags & DIGI_FORCEDCD)) - if (ch->digiext.digi_flags & DIGI_FORCEDCD) - writeb(0, &bc->mint); - ch->imodem = readb(&bc->mstat); - hflow = termios2digi_h(ch, ts->c_cflag); - if (hflow != ch->hflow) { - ch->hflow = hflow; - /* - * Hard flow control has been selected but the board is not - * using it. Activate hard flow control now. - */ - fepcmd(ch, SETHFLOW, hflow, 0xff, 0, 1); - } - mval ^= ch->modemfake & (mval ^ ch->modem); - - if (ch->omodem ^ mval) { - ch->omodem = mval; - /* - * The below command sets the DTR and RTS mstat structure. If - * hard flow control is NOT active these changes will drive the - * output of the actual DTR and RTS lines. If hard flow control - * is active, the changes will be saved in the mstat structure - * and only asserted when hard flow control is turned off. - */ - - /* First reset DTR & RTS; then set them */ - fepcmd(ch, SETMODEM, 0, ((ch->m_dtr)|(ch->m_rts)), 0, 1); - fepcmd(ch, SETMODEM, mval, 0, 0, 1); - } - if (ch->startc != ch->fepstartc || ch->stopc != ch->fepstopc) { - ch->fepstartc = ch->startc; - ch->fepstopc = ch->stopc; - /* - * The XON / XOFF characters have changed; propagate these - * changes to the card. - */ - fepcmd(ch, SONOFFC, ch->fepstartc, ch->fepstopc, 0, 1); - } - if (ch->startca != ch->fepstartca || ch->stopca != ch->fepstopca) { - ch->fepstartca = ch->startca; - ch->fepstopca = ch->stopca; - /* - * Similar to the above, this time the auxilarly XON / XOFF - * characters have changed; propagate these changes to the card. - */ - fepcmd(ch, SAUXONOFFC, ch->fepstartca, ch->fepstopca, 0, 1); - } -} - -/* Caller holds lock */ -static void receive_data(struct channel *ch, struct tty_struct *tty) -{ - unchar *rptr; - struct ktermios *ts = NULL; - struct board_chan __iomem *bc; - int dataToRead, wrapgap, bytesAvailable; - unsigned int tail, head; - unsigned int wrapmask; - - /* - * This routine is called by doint when a receive data event has taken - * place. - */ - globalwinon(ch); - if (ch->statusflags & RXSTOPPED) - return; - if (tty) - ts = tty->termios; - bc = ch->brdchan; - BUG_ON(!bc); - wrapmask = ch->rxbufsize - 1; - - /* - * Get the head and tail pointers to the receiver queue. Wrap the head - * pointer if it has reached the end of the buffer. - */ - head = readw(&bc->rin); - head &= wrapmask; - tail = readw(&bc->rout) & wrapmask; - - bytesAvailable = (head - tail) & wrapmask; - if (bytesAvailable == 0) - return; - - /* If CREAD bit is off or device not open, set TX tail to head */ - if (!tty || !ts || !(ts->c_cflag & CREAD)) { - writew(head, &bc->rout); - return; - } - - if (tty_buffer_request_room(tty, bytesAvailable + 1) == 0) - return; - - if (readb(&bc->orun)) { - writeb(0, &bc->orun); - printk(KERN_WARNING "epca; overrun! DigiBoard device %s\n", - tty->name); - tty_insert_flip_char(tty, 0, TTY_OVERRUN); - } - rxwinon(ch); - while (bytesAvailable > 0) { - /* Begin while there is data on the card */ - wrapgap = (head >= tail) ? head - tail : ch->rxbufsize - tail; - /* - * Even if head has wrapped around only report the amount of - * data to be equal to the size - tail. Remember memcpy can't - * automaticly wrap around the receive buffer. - */ - dataToRead = (wrapgap < bytesAvailable) ? wrapgap - : bytesAvailable; - /* Make sure we don't overflow the buffer */ - dataToRead = tty_prepare_flip_string(tty, &rptr, dataToRead); - if (dataToRead == 0) - break; - /* - * Move data read from our card into the line disciplines - * buffer for translation if necessary. - */ - memcpy_fromio(rptr, ch->rxptr + tail, dataToRead); - tail = (tail + dataToRead) & wrapmask; - bytesAvailable -= dataToRead; - } /* End while there is data on the card */ - globalwinon(ch); - writew(tail, &bc->rout); - /* Must be called with global data */ - tty_schedule_flip(tty); -} - -static int info_ioctl(struct tty_struct *tty, struct file *file, - unsigned int cmd, unsigned long arg) -{ - switch (cmd) { - case DIGI_GETINFO: - { - struct digi_info di; - int brd; - - if (get_user(brd, (unsigned int __user *)arg)) - return -EFAULT; - if (brd < 0 || brd >= num_cards || num_cards == 0) - return -ENODEV; - - memset(&di, 0, sizeof(di)); - - di.board = brd; - di.status = boards[brd].status; - di.type = boards[brd].type ; - di.numports = boards[brd].numports ; - /* Legacy fixups - just move along nothing to see */ - di.port = (unsigned char *)boards[brd].port ; - di.membase = (unsigned char *)boards[brd].membase ; - - if (copy_to_user((void __user *)arg, &di, sizeof(di))) - return -EFAULT; - break; - - } - - case DIGI_POLLER: - { - int brd = arg & 0xff000000 >> 16; - unsigned char state = arg & 0xff; - - if (brd < 0 || brd >= num_cards) { - printk(KERN_ERR "epca: DIGI POLLER : brd not valid!\n"); - return -ENODEV; - } - digi_poller_inhibited = state; - break; - } - - case DIGI_INIT: - { - /* - * This call is made by the apps to complete the - * initialization of the board(s). This routine is - * responsible for setting the card to its initial - * state and setting the drivers control fields to the - * sutianle settings for the card in question. - */ - int crd; - for (crd = 0; crd < num_cards; crd++) - post_fep_init(crd); - break; - } - default: - return -ENOTTY; - } - return 0; -} - -static int pc_tiocmget(struct tty_struct *tty, struct file *file) -{ - struct channel *ch = tty->driver_data; - struct board_chan __iomem *bc; - unsigned int mstat, mflag = 0; - unsigned long flags; - - if (ch) - bc = ch->brdchan; - else - return -EINVAL; - - spin_lock_irqsave(&epca_lock, flags); - globalwinon(ch); - mstat = readb(&bc->mstat); - memoff(ch); - spin_unlock_irqrestore(&epca_lock, flags); - - if (mstat & ch->m_dtr) - mflag |= TIOCM_DTR; - if (mstat & ch->m_rts) - mflag |= TIOCM_RTS; - if (mstat & ch->m_cts) - mflag |= TIOCM_CTS; - if (mstat & ch->dsr) - mflag |= TIOCM_DSR; - if (mstat & ch->m_ri) - mflag |= TIOCM_RI; - if (mstat & ch->dcd) - mflag |= TIOCM_CD; - return mflag; -} - -static int pc_tiocmset(struct tty_struct *tty, struct file *file, - unsigned int set, unsigned int clear) -{ - struct channel *ch = tty->driver_data; - unsigned long flags; - - if (!ch) - return -EINVAL; - - spin_lock_irqsave(&epca_lock, flags); - /* - * I think this modemfake stuff is broken. It doesn't correctly reflect - * the behaviour desired by the TIOCM* ioctls. Therefore this is - * probably broken. - */ - if (set & TIOCM_RTS) { - ch->modemfake |= ch->m_rts; - ch->modem |= ch->m_rts; - } - if (set & TIOCM_DTR) { - ch->modemfake |= ch->m_dtr; - ch->modem |= ch->m_dtr; - } - if (clear & TIOCM_RTS) { - ch->modemfake |= ch->m_rts; - ch->modem &= ~ch->m_rts; - } - if (clear & TIOCM_DTR) { - ch->modemfake |= ch->m_dtr; - ch->modem &= ~ch->m_dtr; - } - globalwinon(ch); - /* - * The below routine generally sets up parity, baud, flow control - * issues, etc.... It effect both control flags and input flags. - */ - epcaparam(tty, ch); - memoff(ch); - spin_unlock_irqrestore(&epca_lock, flags); - return 0; -} - -static int pc_ioctl(struct tty_struct *tty, struct file *file, - unsigned int cmd, unsigned long arg) -{ - digiflow_t dflow; - unsigned long flags; - unsigned int mflag, mstat; - unsigned char startc, stopc; - struct board_chan __iomem *bc; - struct channel *ch = tty->driver_data; - void __user *argp = (void __user *)arg; - - if (ch) - bc = ch->brdchan; - else - return -EINVAL; - switch (cmd) { - case TIOCMODG: - mflag = pc_tiocmget(tty, file); - if (put_user(mflag, (unsigned long __user *)argp)) - return -EFAULT; - break; - case TIOCMODS: - if (get_user(mstat, (unsigned __user *)argp)) - return -EFAULT; - return pc_tiocmset(tty, file, mstat, ~mstat); - case TIOCSDTR: - spin_lock_irqsave(&epca_lock, flags); - ch->omodem |= ch->m_dtr; - globalwinon(ch); - fepcmd(ch, SETMODEM, ch->m_dtr, 0, 10, 1); - memoff(ch); - spin_unlock_irqrestore(&epca_lock, flags); - break; - - case TIOCCDTR: - spin_lock_irqsave(&epca_lock, flags); - ch->omodem &= ~ch->m_dtr; - globalwinon(ch); - fepcmd(ch, SETMODEM, 0, ch->m_dtr, 10, 1); - memoff(ch); - spin_unlock_irqrestore(&epca_lock, flags); - break; - case DIGI_GETA: - if (copy_to_user(argp, &ch->digiext, sizeof(digi_t))) - return -EFAULT; - break; - case DIGI_SETAW: - case DIGI_SETAF: - if (cmd == DIGI_SETAW) { - /* Setup an event to indicate when the transmit - buffer empties */ - spin_lock_irqsave(&epca_lock, flags); - setup_empty_event(tty, ch); - spin_unlock_irqrestore(&epca_lock, flags); - tty_wait_until_sent(tty, 0); - } else { - /* ldisc lock already held in ioctl */ - if (tty->ldisc->ops->flush_buffer) - tty->ldisc->ops->flush_buffer(tty); - } - /* Fall Thru */ - case DIGI_SETA: - if (copy_from_user(&ch->digiext, argp, sizeof(digi_t))) - return -EFAULT; - - if (ch->digiext.digi_flags & DIGI_ALTPIN) { - ch->dcd = ch->m_dsr; - ch->dsr = ch->m_dcd; - } else { - ch->dcd = ch->m_dcd; - ch->dsr = ch->m_dsr; - } - - spin_lock_irqsave(&epca_lock, flags); - globalwinon(ch); - - /* - * The below routine generally sets up parity, baud, flow - * control issues, etc.... It effect both control flags and - * input flags. - */ - epcaparam(tty, ch); - memoff(ch); - spin_unlock_irqrestore(&epca_lock, flags); - break; - - case DIGI_GETFLOW: - case DIGI_GETAFLOW: - spin_lock_irqsave(&epca_lock, flags); - globalwinon(ch); - if (cmd == DIGI_GETFLOW) { - dflow.startc = readb(&bc->startc); - dflow.stopc = readb(&bc->stopc); - } else { - dflow.startc = readb(&bc->startca); - dflow.stopc = readb(&bc->stopca); - } - memoff(ch); - spin_unlock_irqrestore(&epca_lock, flags); - - if (copy_to_user(argp, &dflow, sizeof(dflow))) - return -EFAULT; - break; - - case DIGI_SETAFLOW: - case DIGI_SETFLOW: - if (cmd == DIGI_SETFLOW) { - startc = ch->startc; - stopc = ch->stopc; - } else { - startc = ch->startca; - stopc = ch->stopca; - } - - if (copy_from_user(&dflow, argp, sizeof(dflow))) - return -EFAULT; - - if (dflow.startc != startc || dflow.stopc != stopc) { - /* Begin if setflow toggled */ - spin_lock_irqsave(&epca_lock, flags); - globalwinon(ch); - - if (cmd == DIGI_SETFLOW) { - ch->fepstartc = ch->startc = dflow.startc; - ch->fepstopc = ch->stopc = dflow.stopc; - fepcmd(ch, SONOFFC, ch->fepstartc, - ch->fepstopc, 0, 1); - } else { - ch->fepstartca = ch->startca = dflow.startc; - ch->fepstopca = ch->stopca = dflow.stopc; - fepcmd(ch, SAUXONOFFC, ch->fepstartca, - ch->fepstopca, 0, 1); - } - - if (ch->statusflags & TXSTOPPED) - pc_start(tty); - - memoff(ch); - spin_unlock_irqrestore(&epca_lock, flags); - } /* End if setflow toggled */ - break; - default: - return -ENOIOCTLCMD; - } - return 0; -} - -static void pc_set_termios(struct tty_struct *tty, struct ktermios *old_termios) -{ - struct channel *ch; - unsigned long flags; - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - - if (ch != NULL) { /* Begin if channel valid */ - spin_lock_irqsave(&epca_lock, flags); - globalwinon(ch); - epcaparam(tty, ch); - memoff(ch); - spin_unlock_irqrestore(&epca_lock, flags); - - if ((old_termios->c_cflag & CRTSCTS) && - ((tty->termios->c_cflag & CRTSCTS) == 0)) - tty->hw_stopped = 0; - - if (!(old_termios->c_cflag & CLOCAL) && - (tty->termios->c_cflag & CLOCAL)) - wake_up_interruptible(&ch->port.open_wait); - - } /* End if channel valid */ -} - -static void do_softint(struct work_struct *work) -{ - struct channel *ch = container_of(work, struct channel, tqueue); - /* Called in response to a modem change event */ - if (ch && ch->magic == EPCA_MAGIC) { - struct tty_struct *tty = tty_port_tty_get(&ch->port); - - if (tty && tty->driver_data) { - if (test_and_clear_bit(EPCA_EVENT_HANGUP, &ch->event)) { - tty_hangup(tty); - wake_up_interruptible(&ch->port.open_wait); - clear_bit(ASYNCB_NORMAL_ACTIVE, - &ch->port.flags); - } - } - tty_kref_put(tty); - } -} - -/* - * pc_stop and pc_start provide software flow control to the routine and the - * pc_ioctl routine. - */ -static void pc_stop(struct tty_struct *tty) -{ - struct channel *ch; - unsigned long flags; - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch != NULL) { - spin_lock_irqsave(&epca_lock, flags); - if ((ch->statusflags & TXSTOPPED) == 0) { - /* Begin if transmit stop requested */ - globalwinon(ch); - /* STOP transmitting now !! */ - fepcmd(ch, PAUSETX, 0, 0, 0, 0); - ch->statusflags |= TXSTOPPED; - memoff(ch); - } /* End if transmit stop requested */ - spin_unlock_irqrestore(&epca_lock, flags); - } -} - -static void pc_start(struct tty_struct *tty) -{ - struct channel *ch; - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch != NULL) { - unsigned long flags; - spin_lock_irqsave(&epca_lock, flags); - /* Just in case output was resumed because of a change - in Digi-flow */ - if (ch->statusflags & TXSTOPPED) { - /* Begin transmit resume requested */ - struct board_chan __iomem *bc; - globalwinon(ch); - bc = ch->brdchan; - if (ch->statusflags & LOWWAIT) - writeb(1, &bc->ilow); - /* Okay, you can start transmitting again... */ - fepcmd(ch, RESUMETX, 0, 0, 0, 0); - ch->statusflags &= ~TXSTOPPED; - memoff(ch); - } /* End transmit resume requested */ - spin_unlock_irqrestore(&epca_lock, flags); - } -} - -/* - * The below routines pc_throttle and pc_unthrottle are used to slow (And - * resume) the receipt of data into the kernels receive buffers. The exact - * occurrence of this depends on the size of the kernels receive buffer and - * what the 'watermarks' are set to for that buffer. See the n_ttys.c file for - * more details. - */ -static void pc_throttle(struct tty_struct *tty) -{ - struct channel *ch; - unsigned long flags; - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch != NULL) { - spin_lock_irqsave(&epca_lock, flags); - if ((ch->statusflags & RXSTOPPED) == 0) { - globalwinon(ch); - fepcmd(ch, PAUSERX, 0, 0, 0, 0); - ch->statusflags |= RXSTOPPED; - memoff(ch); - } - spin_unlock_irqrestore(&epca_lock, flags); - } -} - -static void pc_unthrottle(struct tty_struct *tty) -{ - struct channel *ch; - unsigned long flags; - /* - * verifyChannel returns the channel from the tty struct if it is - * valid. This serves as a sanity check. - */ - ch = verifyChannel(tty); - if (ch != NULL) { - /* Just in case output was resumed because of a change - in Digi-flow */ - spin_lock_irqsave(&epca_lock, flags); - if (ch->statusflags & RXSTOPPED) { - globalwinon(ch); - fepcmd(ch, RESUMERX, 0, 0, 0, 0); - ch->statusflags &= ~RXSTOPPED; - memoff(ch); - } - spin_unlock_irqrestore(&epca_lock, flags); - } -} - -static int pc_send_break(struct tty_struct *tty, int msec) -{ - struct channel *ch = tty->driver_data; - unsigned long flags; - - if (msec == -1) - msec = 0xFFFF; - else if (msec > 0xFFFE) - msec = 0xFFFE; - else if (msec < 1) - msec = 1; - - spin_lock_irqsave(&epca_lock, flags); - globalwinon(ch); - /* - * Maybe I should send an infinite break here, schedule() for msec - * amount of time, and then stop the break. This way, the user can't - * screw up the FEP by causing digi_send_break() to be called (i.e. via - * an ioctl()) more than once in msec amount of time. - * Try this for now... - */ - fepcmd(ch, SENDBREAK, msec, 0, 10, 0); - memoff(ch); - spin_unlock_irqrestore(&epca_lock, flags); - return 0; -} - -/* Caller MUST hold the lock */ -static void setup_empty_event(struct tty_struct *tty, struct channel *ch) -{ - struct board_chan __iomem *bc = ch->brdchan; - - globalwinon(ch); - ch->statusflags |= EMPTYWAIT; - /* - * When set the iempty flag request a event to be generated when the - * transmit buffer is empty (If there is no BREAK in progress). - */ - writeb(1, &bc->iempty); - memoff(ch); -} - -#ifndef MODULE -static void __init epca_setup(char *str, int *ints) -{ - struct board_info board; - int index, loop, last; - char *temp, *t2; - unsigned len; - - /* - * If this routine looks a little strange it is because it is only - * called if a LILO append command is given to boot the kernel with - * parameters. In this way, we can provide the user a method of - * changing his board configuration without rebuilding the kernel. - */ - if (!liloconfig) - liloconfig = 1; - - memset(&board, 0, sizeof(board)); - - /* Assume the data is int first, later we can change it */ - /* I think that array position 0 of ints holds the number of args */ - for (last = 0, index = 1; index <= ints[0]; index++) - switch (index) { /* Begin parse switch */ - case 1: - board.status = ints[index]; - /* - * We check for 2 (As opposed to 1; because 2 is a flag - * instructing the driver to ignore epcaconfig.) For - * this reason we check for 2. - */ - if (board.status == 2) { - /* Begin ignore epcaconfig as well as lilo cmd line */ - nbdevs = 0; - num_cards = 0; - return; - } /* End ignore epcaconfig as well as lilo cmd line */ - - if (board.status > 2) { - printk(KERN_ERR "epca_setup: Invalid board status 0x%x\n", - board.status); - invalid_lilo_config = 1; - setup_error_code |= INVALID_BOARD_STATUS; - return; - } - last = index; - break; - case 2: - board.type = ints[index]; - if (board.type >= PCIXEM) { - printk(KERN_ERR "epca_setup: Invalid board type 0x%x\n", board.type); - invalid_lilo_config = 1; - setup_error_code |= INVALID_BOARD_TYPE; - return; - } - last = index; - break; - case 3: - board.altpin = ints[index]; - if (board.altpin > 1) { - printk(KERN_ERR "epca_setup: Invalid board altpin 0x%x\n", board.altpin); - invalid_lilo_config = 1; - setup_error_code |= INVALID_ALTPIN; - return; - } - last = index; - break; - - case 4: - board.numports = ints[index]; - if (board.numports < 2 || board.numports > 256) { - printk(KERN_ERR "epca_setup: Invalid board numports 0x%x\n", board.numports); - invalid_lilo_config = 1; - setup_error_code |= INVALID_NUM_PORTS; - return; - } - nbdevs += board.numports; - last = index; - break; - - case 5: - board.port = ints[index]; - if (ints[index] <= 0) { - printk(KERN_ERR "epca_setup: Invalid io port 0x%x\n", (unsigned int)board.port); - invalid_lilo_config = 1; - setup_error_code |= INVALID_PORT_BASE; - return; - } - last = index; - break; - - case 6: - board.membase = ints[index]; - if (ints[index] <= 0) { - printk(KERN_ERR "epca_setup: Invalid memory base 0x%x\n", - (unsigned int)board.membase); - invalid_lilo_config = 1; - setup_error_code |= INVALID_MEM_BASE; - return; - } - last = index; - break; - - default: - printk(KERN_ERR "<Error> - epca_setup: Too many integer parms\n"); - return; - - } /* End parse switch */ - - while (str && *str) { /* Begin while there is a string arg */ - /* find the next comma or terminator */ - temp = str; - /* While string is not null, and a comma hasn't been found */ - while (*temp && (*temp != ',')) - temp++; - if (!*temp) - temp = NULL; - else - *temp++ = 0; - /* Set index to the number of args + 1 */ - index = last + 1; - - switch (index) { - case 1: - len = strlen(str); - if (strncmp("Disable", str, len) == 0) - board.status = 0; - else if (strncmp("Enable", str, len) == 0) - board.status = 1; - else { - printk(KERN_ERR "epca_setup: Invalid status %s\n", str); - invalid_lilo_config = 1; - setup_error_code |= INVALID_BOARD_STATUS; - return; - } - last = index; - break; - - case 2: - for (loop = 0; loop < EPCA_NUM_TYPES; loop++) - if (strcmp(board_desc[loop], str) == 0) - break; - /* - * If the index incremented above refers to a - * legitamate board type set it here. - */ - if (index < EPCA_NUM_TYPES) - board.type = loop; - else { - printk(KERN_ERR "epca_setup: Invalid board type: %s\n", str); - invalid_lilo_config = 1; - setup_error_code |= INVALID_BOARD_TYPE; - return; - } - last = index; - break; - - case 3: - len = strlen(str); - if (strncmp("Disable", str, len) == 0) - board.altpin = 0; - else if (strncmp("Enable", str, len) == 0) - board.altpin = 1; - else { - printk(KERN_ERR "epca_setup: Invalid altpin %s\n", str); - invalid_lilo_config = 1; - setup_error_code |= INVALID_ALTPIN; - return; - } - last = index; - break; - - case 4: - t2 = str; - while (isdigit(*t2)) - t2++; - - if (*t2) { - printk(KERN_ERR "epca_setup: Invalid port count %s\n", str); - invalid_lilo_config = 1; - setup_error_code |= INVALID_NUM_PORTS; - return; - } - - /* - * There is not a man page for simple_strtoul but the - * code can be found in vsprintf.c. The first argument - * is the string to translate (To an unsigned long - * obviously), the second argument can be the address - * of any character variable or a NULL. If a variable - * is given, the end pointer of the string will be - * stored in that variable; if a NULL is given the end - * pointer will not be returned. The last argument is - * the base to use. If a 0 is indicated, the routine - * will attempt to determine the proper base by looking - * at the values prefix (A '0' for octal, a 'x' for - * hex, etc ... If a value is given it will use that - * value as the base. - */ - board.numports = simple_strtoul(str, NULL, 0); - nbdevs += board.numports; - last = index; - break; - - case 5: - t2 = str; - while (isxdigit(*t2)) - t2++; - - if (*t2) { - printk(KERN_ERR "epca_setup: Invalid i/o address %s\n", str); - invalid_lilo_config = 1; - setup_error_code |= INVALID_PORT_BASE; - return; - } - - board.port = simple_strtoul(str, NULL, 16); - last = index; - break; - - case 6: - t2 = str; - while (isxdigit(*t2)) - t2++; - - if (*t2) { - printk(KERN_ERR "epca_setup: Invalid memory base %s\n", str); - invalid_lilo_config = 1; - setup_error_code |= INVALID_MEM_BASE; - return; - } - board.membase = simple_strtoul(str, NULL, 16); - last = index; - break; - default: - printk(KERN_ERR "epca: Too many string parms\n"); - return; - } - str = temp; - } /* End while there is a string arg */ - - if (last < 6) { - printk(KERN_ERR "epca: Insufficient parms specified\n"); - return; - } - - /* I should REALLY validate the stuff here */ - /* Copies our local copy of board into boards */ - memcpy((void *)&boards[num_cards], (void *)&board, sizeof(board)); - /* Does this get called once per lilo arg are what ? */ - printk(KERN_INFO "PC/Xx: Added board %i, %s %i ports at 0x%4.4X base 0x%6.6X\n", - num_cards, board_desc[board.type], - board.numports, (int)board.port, (unsigned int) board.membase); - num_cards++; -} - -static int __init epca_real_setup(char *str) -{ - int ints[11]; - - epca_setup(get_options(str, 11, ints), ints); - return 1; -} - -__setup("digiepca", epca_real_setup); -#endif - -enum epic_board_types { - brd_xr = 0, - brd_xem, - brd_cx, - brd_xrj, -}; - -/* indexed directly by epic_board_types enum */ -static struct { - unsigned char board_type; - unsigned bar_idx; /* PCI base address region */ -} epca_info_tbl[] = { - { PCIXR, 0, }, - { PCIXEM, 0, }, - { PCICX, 0, }, - { PCIXRJ, 2, }, -}; - -static int __devinit epca_init_one(struct pci_dev *pdev, - const struct pci_device_id *ent) -{ - static int board_num = -1; - int board_idx, info_idx = ent->driver_data; - unsigned long addr; - - if (pci_enable_device(pdev)) - return -EIO; - - board_num++; - board_idx = board_num + num_cards; - if (board_idx >= MAXBOARDS) - goto err_out; - - addr = pci_resource_start(pdev, epca_info_tbl[info_idx].bar_idx); - if (!addr) { - printk(KERN_ERR PFX "PCI region #%d not available (size 0)\n", - epca_info_tbl[info_idx].bar_idx); - goto err_out; - } - - boards[board_idx].status = ENABLED; - boards[board_idx].type = epca_info_tbl[info_idx].board_type; - boards[board_idx].numports = 0x0; - boards[board_idx].port = addr + PCI_IO_OFFSET; - boards[board_idx].membase = addr; - - if (!request_mem_region(addr + PCI_IO_OFFSET, 0x200000, "epca")) { - printk(KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n", - 0x200000, addr + PCI_IO_OFFSET); - goto err_out; - } - - boards[board_idx].re_map_port = ioremap_nocache(addr + PCI_IO_OFFSET, - 0x200000); - if (!boards[board_idx].re_map_port) { - printk(KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n", - 0x200000, addr + PCI_IO_OFFSET); - goto err_out_free_pciio; - } - - if (!request_mem_region(addr, 0x200000, "epca")) { - printk(KERN_ERR PFX "resource 0x%x @ 0x%lx unavailable\n", - 0x200000, addr); - goto err_out_free_iounmap; - } - - boards[board_idx].re_map_membase = ioremap_nocache(addr, 0x200000); - if (!boards[board_idx].re_map_membase) { - printk(KERN_ERR PFX "cannot map 0x%x @ 0x%lx\n", - 0x200000, addr + PCI_IO_OFFSET); - goto err_out_free_memregion; - } - - /* - * I don't know what the below does, but the hardware guys say its - * required on everything except PLX (In this case XRJ). - */ - if (info_idx != brd_xrj) { - pci_write_config_byte(pdev, 0x40, 0); - pci_write_config_byte(pdev, 0x46, 0); - } - - return 0; - -err_out_free_memregion: - release_mem_region(addr, 0x200000); -err_out_free_iounmap: - iounmap(boards[board_idx].re_map_port); -err_out_free_pciio: - release_mem_region(addr + PCI_IO_OFFSET, 0x200000); -err_out: - return -ENODEV; -} - - -static struct pci_device_id epca_pci_tbl[] = { - { PCI_VENDOR_DIGI, PCI_DEVICE_XR, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xr }, - { PCI_VENDOR_DIGI, PCI_DEVICE_XEM, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xem }, - { PCI_VENDOR_DIGI, PCI_DEVICE_CX, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_cx }, - { PCI_VENDOR_DIGI, PCI_DEVICE_XRJ, PCI_ANY_ID, PCI_ANY_ID, 0, 0, brd_xrj }, - { 0, } -}; - -MODULE_DEVICE_TABLE(pci, epca_pci_tbl); - -static int __init init_PCI(void) -{ - memset(&epca_driver, 0, sizeof(epca_driver)); - epca_driver.name = "epca"; - epca_driver.id_table = epca_pci_tbl; - epca_driver.probe = epca_init_one; - - return pci_register_driver(&epca_driver); -} - -MODULE_LICENSE("GPL"); |