diff options
Diffstat (limited to 'sound/oss/mpu401.c')
| -rw-r--r-- | sound/oss/mpu401.c | 1826 |
1 files changed, 1826 insertions, 0 deletions
diff --git a/sound/oss/mpu401.c b/sound/oss/mpu401.c new file mode 100644 index 000000000000..b66f53fa8db0 --- /dev/null +++ b/sound/oss/mpu401.c @@ -0,0 +1,1826 @@ +/* + * sound/mpu401.c + * + * The low level driver for Roland MPU-401 compatible Midi cards. + */ +/* + * Copyright (C) by Hannu Savolainen 1993-1997 + * + * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL) + * Version 2 (June 1991). See the "COPYING" file distributed with this software + * for more info. + * + * + * Thomas Sailer ioctl code reworked (vmalloc/vfree removed) + * Alan Cox modularisation, use normal request_irq, use dev_id + * Bartlomiej Zolnierkiewicz removed some __init to allow using many drivers + * Chris Rankin Update the module-usage counter for the coprocessor + * Zwane Mwaikambo Changed attach/unload resource freeing + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/spinlock.h> +#define USE_SEQ_MACROS +#define USE_SIMPLE_MACROS + +#include "sound_config.h" + +#include "coproc.h" +#include "mpu401.h" + +static int timer_mode = TMR_INTERNAL, timer_caps = TMR_INTERNAL; + +struct mpu_config +{ + int base; /* + * I/O base + */ + int irq; + int opened; /* + * Open mode + */ + int devno; + int synthno; + int uart_mode; + int initialized; + int mode; +#define MODE_MIDI 1 +#define MODE_SYNTH 2 + unsigned char version, revision; + unsigned int capabilities; +#define MPU_CAP_INTLG 0x10000000 +#define MPU_CAP_SYNC 0x00000010 +#define MPU_CAP_FSK 0x00000020 +#define MPU_CAP_CLS 0x00000040 +#define MPU_CAP_SMPTE 0x00000080 +#define MPU_CAP_2PORT 0x00000001 + int timer_flag; + +#define MBUF_MAX 10 +#define BUFTEST(dc) if (dc->m_ptr >= MBUF_MAX || dc->m_ptr < 0) \ + {printk( "MPU: Invalid buffer pointer %d/%d, s=%d\n", dc->m_ptr, dc->m_left, dc->m_state);dc->m_ptr--;} + int m_busy; + unsigned char m_buf[MBUF_MAX]; + int m_ptr; + int m_state; + int m_left; + unsigned char last_status; + void (*inputintr) (int dev, unsigned char data); + int shared_irq; + int *osp; + spinlock_t lock; + }; + +#define DATAPORT(base) (base) +#define COMDPORT(base) (base+1) +#define STATPORT(base) (base+1) + + +static void mpu401_close(int dev); + +static inline int mpu401_status(struct mpu_config *devc) +{ + return inb(STATPORT(devc->base)); +} + +#define input_avail(devc) (!(mpu401_status(devc)&INPUT_AVAIL)) +#define output_ready(devc) (!(mpu401_status(devc)&OUTPUT_READY)) + +static inline void write_command(struct mpu_config *devc, unsigned char cmd) +{ + outb(cmd, COMDPORT(devc->base)); +} + +static inline int read_data(struct mpu_config *devc) +{ + return inb(DATAPORT(devc->base)); +} + +static inline void write_data(struct mpu_config *devc, unsigned char byte) +{ + outb(byte, DATAPORT(devc->base)); +} + +#define OUTPUT_READY 0x40 +#define INPUT_AVAIL 0x80 +#define MPU_ACK 0xFE +#define MPU_RESET 0xFF +#define UART_MODE_ON 0x3F + +static struct mpu_config dev_conf[MAX_MIDI_DEV]; + +static int n_mpu_devs; + +static int reset_mpu401(struct mpu_config *devc); +static void set_uart_mode(int dev, struct mpu_config *devc, int arg); + +static int mpu_timer_init(int midi_dev); +static void mpu_timer_interrupt(void); +static void timer_ext_event(struct mpu_config *devc, int event, int parm); + +static struct synth_info mpu_synth_info_proto = { + "MPU-401 MIDI interface", + 0, + SYNTH_TYPE_MIDI, + MIDI_TYPE_MPU401, + 0, 128, + 0, 128, + SYNTH_CAP_INPUT +}; + +static struct synth_info mpu_synth_info[MAX_MIDI_DEV]; + +/* + * States for the input scanner + */ + +#define ST_INIT 0 /* Ready for timing byte or msg */ +#define ST_TIMED 1 /* Leading timing byte rcvd */ +#define ST_DATABYTE 2 /* Waiting for (nr_left) data bytes */ + +#define ST_SYSMSG 100 /* System message (sysx etc). */ +#define ST_SYSEX 101 /* System exclusive msg */ +#define ST_MTC 102 /* Midi Time Code (MTC) qframe msg */ +#define ST_SONGSEL 103 /* Song select */ +#define ST_SONGPOS 104 /* Song position pointer */ + +static unsigned char len_tab[] = /* # of data bytes following a status + */ +{ + 2, /* 8x */ + 2, /* 9x */ + 2, /* Ax */ + 2, /* Bx */ + 1, /* Cx */ + 1, /* Dx */ + 2, /* Ex */ + 0 /* Fx */ +}; + +#define STORE(cmd) \ +{ \ + int len; \ + unsigned char obuf[8]; \ + cmd; \ + seq_input_event(obuf, len); \ +} + +#define _seqbuf obuf +#define _seqbufptr 0 +#define _SEQ_ADVBUF(x) len=x + +static int mpu_input_scanner(struct mpu_config *devc, unsigned char midic) +{ + + switch (devc->m_state) + { + case ST_INIT: + switch (midic) + { + case 0xf8: + /* Timer overflow */ + break; + + case 0xfc: + printk("<all end>"); + break; + + case 0xfd: + if (devc->timer_flag) + mpu_timer_interrupt(); + break; + + case 0xfe: + return MPU_ACK; + + case 0xf0: + case 0xf1: + case 0xf2: + case 0xf3: + case 0xf4: + case 0xf5: + case 0xf6: + case 0xf7: + printk("<Trk data rq #%d>", midic & 0x0f); + break; + + case 0xf9: + printk("<conductor rq>"); + break; + + case 0xff: + devc->m_state = ST_SYSMSG; + break; + + default: + if (midic <= 0xef) + { + /* printk( "mpu time: %d ", midic); */ + devc->m_state = ST_TIMED; + } + else + printk("<MPU: Unknown event %02x> ", midic); + } + break; + + case ST_TIMED: + { + int msg = ((int) (midic & 0xf0) >> 4); + + devc->m_state = ST_DATABYTE; + + if (msg < 8) /* Data byte */ + { + /* printk( "midi msg (running status) "); */ + msg = ((int) (devc->last_status & 0xf0) >> 4); + msg -= 8; + devc->m_left = len_tab[msg] - 1; + + devc->m_ptr = 2; + devc->m_buf[0] = devc->last_status; + devc->m_buf[1] = midic; + + if (devc->m_left <= 0) + { + devc->m_state = ST_INIT; + do_midi_msg(devc->synthno, devc->m_buf, devc->m_ptr); + devc->m_ptr = 0; + } + } + else if (msg == 0xf) /* MPU MARK */ + { + devc->m_state = ST_INIT; + + switch (midic) + { + case 0xf8: + /* printk( "NOP "); */ + break; + + case 0xf9: + /* printk( "meas end "); */ + break; + + case 0xfc: + /* printk( "data end "); */ + break; + + default: + printk("Unknown MPU mark %02x\n", midic); + } + } + else + { + devc->last_status = midic; + /* printk( "midi msg "); */ + msg -= 8; + devc->m_left = len_tab[msg]; + + devc->m_ptr = 1; + devc->m_buf[0] = midic; + + if (devc->m_left <= 0) + { + devc->m_state = ST_INIT; + do_midi_msg(devc->synthno, devc->m_buf, devc->m_ptr); + devc->m_ptr = 0; + } + } + } + break; + + case ST_SYSMSG: + switch (midic) + { + case 0xf0: + printk("<SYX>"); + devc->m_state = ST_SYSEX; + break; + + case 0xf1: + devc->m_state = ST_MTC; + break; + + case 0xf2: + devc->m_state = ST_SONGPOS; + devc->m_ptr = 0; + break; + + case 0xf3: + devc->m_state = ST_SONGSEL; + break; + + case 0xf6: + /* printk( "tune_request\n"); */ + devc->m_state = ST_INIT; + + /* + * Real time messages + */ + case 0xf8: + /* midi clock */ + devc->m_state = ST_INIT; + timer_ext_event(devc, TMR_CLOCK, 0); + break; + + case 0xfA: + devc->m_state = ST_INIT; + timer_ext_event(devc, TMR_START, 0); + break; + + case 0xFB: + devc->m_state = ST_INIT; + timer_ext_event(devc, TMR_CONTINUE, 0); + break; + + case 0xFC: + devc->m_state = ST_INIT; + timer_ext_event(devc, TMR_STOP, 0); + break; + + case 0xFE: + /* active sensing */ + devc->m_state = ST_INIT; + break; + + case 0xff: + /* printk( "midi hard reset"); */ + devc->m_state = ST_INIT; + break; + + default: + printk("unknown MIDI sysmsg %0x\n", midic); + devc->m_state = ST_INIT; + } + break; + + case ST_MTC: + devc->m_state = ST_INIT; + printk("MTC frame %x02\n", midic); + break; + + case ST_SYSEX: + if (midic == 0xf7) + { + printk("<EOX>"); + devc->m_state = ST_INIT; + } + else + printk("%02x ", midic); + break; + + case ST_SONGPOS: + BUFTEST(devc); + devc->m_buf[devc->m_ptr++] = midic; + if (devc->m_ptr == 2) + { + devc->m_state = ST_INIT; + devc->m_ptr = 0; + timer_ext_event(devc, TMR_SPP, + ((devc->m_buf[1] & 0x7f) << 7) | + (devc->m_buf[0] & 0x7f)); + } + break; + + case ST_DATABYTE: + BUFTEST(devc); + devc->m_buf[devc->m_ptr++] = midic; + if ((--devc->m_left) <= 0) + { + devc->m_state = ST_INIT; + do_midi_msg(devc->synthno, devc->m_buf, devc->m_ptr); + devc->m_ptr = 0; + } + break; + + default: + printk("Bad state %d ", devc->m_state); + devc->m_state = ST_INIT; + } + return 1; +} + +static void mpu401_input_loop(struct mpu_config *devc) +{ + unsigned long flags; + int busy; + int n; + + spin_lock_irqsave(&devc->lock,flags); + busy = devc->m_busy; + devc->m_busy = 1; + spin_unlock_irqrestore(&devc->lock,flags); + + if (busy) /* Already inside the scanner */ + return; + + n = 50; + + while (input_avail(devc) && n-- > 0) + { + unsigned char c = read_data(devc); + + if (devc->mode == MODE_SYNTH) + { + mpu_input_scanner(devc, c); + } + else if (devc->opened & OPEN_READ && devc->inputintr != NULL) + devc->inputintr(devc->devno, c); + } + devc->m_busy = 0; +} + +int intchk_mpu401(void *dev_id) +{ + struct mpu_config *devc; + int dev = (int) dev_id; + + devc = &dev_conf[dev]; + return input_avail(devc); +} + +irqreturn_t mpuintr(int irq, void *dev_id, struct pt_regs *dummy) +{ + struct mpu_config *devc; + int dev = (int) dev_id; + int handled = 0; + + devc = &dev_conf[dev]; + + if (input_avail(devc)) + { + handled = 1; + if (devc->base != 0 && (devc->opened & OPEN_READ || devc->mode == MODE_SYNTH)) + mpu401_input_loop(devc); + else + { + /* Dummy read (just to acknowledge the interrupt) */ + read_data(devc); + } + } + return IRQ_RETVAL(handled); +} + +static int mpu401_open(int dev, int mode, + void (*input) (int dev, unsigned char data), + void (*output) (int dev) +) +{ + int err; + struct mpu_config *devc; + struct coproc_operations *coprocessor; + + if (dev < 0 || dev >= num_midis || midi_devs[dev] == NULL) + return -ENXIO; + + devc = &dev_conf[dev]; + + if (devc->opened) + return -EBUSY; + /* + * Verify that the device is really running. + * Some devices (such as Ensoniq SoundScape don't + * work before the on board processor (OBP) is initialized + * by downloading its microcode. + */ + + if (!devc->initialized) + { + if (mpu401_status(devc) == 0xff) /* Bus float */ + { + printk(KERN_ERR "mpu401: Device not initialized properly\n"); + return -EIO; + } + reset_mpu401(devc); + } + + if ( (coprocessor = midi_devs[dev]->coproc) != NULL ) + { + if (!try_module_get(coprocessor->owner)) { + mpu401_close(dev); + return -ENODEV; + } + + if ((err = coprocessor->open(coprocessor->devc, COPR_MIDI)) < 0) + { + printk(KERN_WARNING "MPU-401: Can't access coprocessor device\n"); + mpu401_close(dev); + return err; + } + } + + set_uart_mode(dev, devc, 1); + devc->mode = MODE_MIDI; + devc->synthno = 0; + + mpu401_input_loop(devc); + + devc->inputintr = input; + devc->opened = mode; + + return 0; +} + +static void mpu401_close(int dev) +{ + struct mpu_config *devc; + struct coproc_operations *coprocessor; + + devc = &dev_conf[dev]; + if (devc->uart_mode) + reset_mpu401(devc); /* + * This disables the UART mode + */ + devc->mode = 0; + devc->inputintr = NULL; + + coprocessor = midi_devs[dev]->coproc; + if (coprocessor) { + coprocessor->close(coprocessor->devc, COPR_MIDI); + module_put(coprocessor->owner); + } + devc->opened = 0; +} + +static int mpu401_out(int dev, unsigned char midi_byte) +{ + int timeout; + unsigned long flags; + + struct mpu_config *devc; + + devc = &dev_conf[dev]; + + /* + * Sometimes it takes about 30000 loops before the output becomes ready + * (After reset). Normally it takes just about 10 loops. + */ + + for (timeout = 30000; timeout > 0 && !output_ready(devc); timeout--); + + spin_lock_irqsave(&devc->lock,flags); + if (!output_ready(devc)) + { + printk(KERN_WARNING "mpu401: Send data timeout\n"); + spin_unlock_irqrestore(&devc->lock,flags); + return 0; + } + write_data(devc, midi_byte); + spin_unlock_irqrestore(&devc->lock,flags); + return 1; +} + +static int mpu401_command(int dev, mpu_command_rec * cmd) +{ + int i, timeout, ok; + int ret = 0; + unsigned long flags; + struct mpu_config *devc; + + devc = &dev_conf[dev]; + + if (devc->uart_mode) /* + * Not possible in UART mode + */ + { + printk(KERN_WARNING "mpu401: commands not possible in the UART mode\n"); + return -EINVAL; + } + /* + * Test for input since pending input seems to block the output. + */ + if (input_avail(devc)) + mpu401_input_loop(devc); + + /* + * Sometimes it takes about 50000 loops before the output becomes ready + * (After reset). Normally it takes just about 10 loops. + */ + + timeout = 50000; +retry: + if (timeout-- <= 0) + { + printk(KERN_WARNING "mpu401: Command (0x%x) timeout\n", (int) cmd->cmd); + return -EIO; + } + spin_lock_irqsave(&devc->lock,flags); + + if (!output_ready(devc)) + { + spin_unlock_irqrestore(&devc->lock,flags); + goto retry; + } + write_command(devc, cmd->cmd); + + ok = 0; + for (timeout = 50000; timeout > 0 && !ok; timeout--) + { + if (input_avail(devc)) + { + if (devc->opened && devc->mode == MODE_SYNTH) + { + if (mpu_input_scanner(devc, read_data(devc)) == MPU_ACK) + ok = 1; + } + else + { + /* Device is not currently open. Use simpler method */ + if (read_data(devc) == MPU_ACK) + ok = 1; + } + } + } + if (!ok) + { + spin_unlock_irqrestore(&devc->lock,flags); + return -EIO; + } + if (cmd->nr_args) + { + for (i = 0; i < cmd->nr_args; i++) + { + for (timeout = 3000; timeout > 0 && !output_ready(devc); timeout--); + + if (!mpu401_out(dev, cmd->data[i])) + { + spin_unlock_irqrestore(&devc->lock,flags); + printk(KERN_WARNING "mpu401: Command (0x%x), parm send failed.\n", (int) cmd->cmd); + return -EIO; + } + } + } + ret = 0; + cmd->data[0] = 0; + + if (cmd->nr_returns) + { + for (i = 0; i < cmd->nr_returns; i++) + { + ok = 0; + for (timeout = 5000; timeout > 0 && !ok; timeout--) + if (input_avail(devc)) + { + cmd->data[i] = read_data(devc); + ok = 1; + } + if (!ok) + { + spin_unlock_irqrestore(&devc->lock,flags); + return -EIO; + } + } + } + spin_unlock_irqrestore(&devc->lock,flags); + return ret; +} + +static int mpu_cmd(int dev, int cmd, int data) +{ + int ret; + + static mpu_command_rec rec; + + rec.cmd = cmd & 0xff; + rec.nr_args = ((cmd & 0xf0) == 0xE0); + rec.nr_returns = ((cmd & 0xf0) == 0xA0); + rec.data[0] = data & 0xff; + + if ((ret = mpu401_command(dev, &rec)) < 0) + return ret; + return (unsigned char) rec.data[0]; +} + +static int mpu401_prefix_cmd(int dev, unsigned char status) +{ + struct mpu_config *devc = &dev_conf[dev]; + + if (devc->uart_mode) + return 1; + + if (status < 0xf0) + { + if (mpu_cmd(dev, 0xD0, 0) < 0) + return 0; + return 1; + } + switch (status) + { + case 0xF0: + if (mpu_cmd(dev, 0xDF, 0) < 0) + return 0; + return 1; + + default: + return 0; + } +} + +static int mpu401_start_read(int dev) +{ + return 0; +} + +static int mpu401_end_read(int dev) +{ + return 0; +} + +static int mpu401_ioctl(int dev, unsigned cmd, void __user *arg) +{ + struct mpu_config *devc; + mpu_command_rec rec; + int val, ret; + + devc = &dev_conf[dev]; + switch (cmd) + { + case SNDCTL_MIDI_MPUMODE: + if (!(devc->capabilities & MPU_CAP_INTLG)) { /* No intelligent mode */ + printk(KERN_WARNING "mpu401: Intelligent mode not supported by the HW\n"); + return -EINVAL; + } + if (get_user(val, (int __user *)arg)) + return -EFAULT; + set_uart_mode(dev, devc, !val); + return 0; + + case SNDCTL_MIDI_MPUCMD: + if (copy_from_user(&rec, arg, sizeof(rec))) + return -EFAULT; + if ((ret = mpu401_command(dev, &rec)) < 0) + return ret; + if (copy_to_user(arg, &rec, sizeof(rec))) + return -EFAULT; + return 0; + + default: + return -EINVAL; + } +} + +static void mpu401_kick(int dev) +{ +} + +static int mpu401_buffer_status(int dev) +{ + return 0; /* + * No data in buffers + */ +} + +static int mpu_synth_ioctl(int dev, unsigned int cmd, void __user *arg) +{ + int midi_dev; + struct mpu_config *devc; + + midi_dev = synth_devs[dev]->midi_dev; + + if (midi_dev < 0 || midi_dev > num_midis || midi_devs[midi_dev] == NULL) + return -ENXIO; + + devc = &dev_conf[midi_dev]; + + switch (cmd) + { + + case SNDCTL_SYNTH_INFO: + if (copy_to_user(arg, &mpu_synth_info[midi_dev], + sizeof(struct synth_info))) + return -EFAULT; + return 0; + + case SNDCTL_SYNTH_MEMAVL: + return 0x7fffffff; + + default: + return -EINVAL; + } +} + +static int mpu_synth_open(int dev, int mode) +{ + int midi_dev, err; + struct mpu_config *devc; + struct coproc_operations *coprocessor; + + midi_dev = synth_devs[dev]->midi_dev; + + if (midi_dev < 0 || midi_dev > num_midis || midi_devs[midi_dev] == NULL) + return -ENXIO; + + devc = &dev_conf[midi_dev]; + + /* + * Verify that the device is really running. + * Some devices (such as Ensoniq SoundScape don't + * work before the on board processor (OBP) is initialized + * by downloading its microcode. + */ + + if (!devc->initialized) + { + if (mpu401_status(devc) == 0xff) /* Bus float */ + { + printk(KERN_ERR "mpu401: Device not initialized properly\n"); + return -EIO; + } + reset_mpu401(devc); + } + if (devc->opened) + return -EBUSY; + devc->mode = MODE_SYNTH; + devc->synthno = dev; + + devc->inputintr = NULL; + + coprocessor = midi_devs[midi_dev]->coproc; + if (coprocessor) { + if (!try_module_get(coprocessor->owner)) + return -ENODEV; + + if ((err = coprocessor->open(coprocessor->devc, COPR_MIDI)) < 0) + { + printk(KERN_WARNING "mpu401: Can't access coprocessor device\n"); + return err; + } + } + devc->opened = mode; + reset_mpu401(devc); + + if (mode & OPEN_READ) + { + mpu_cmd(midi_dev, 0x8B, 0); /* Enable data in stop mode */ + mpu_cmd(midi_dev, 0x34, 0); /* Return timing bytes in stop mode */ + mpu_cmd(midi_dev, 0x87, 0); /* Enable pitch & controller */ + } + return 0; +} + +static void mpu_synth_close(int dev) +{ + int midi_dev; + struct mpu_config *devc; + struct coproc_operations *coprocessor; + + midi_dev = synth_devs[dev]->midi_dev; + + devc = &dev_conf[midi_dev]; + mpu_cmd(midi_dev, 0x15, 0); /* Stop recording, playback and MIDI */ + mpu_cmd(midi_dev, 0x8a, 0); /* Disable data in stopped mode */ + + devc->inputintr = NULL; + + coprocessor = midi_devs[midi_dev]->coproc; + if (coprocessor) { + coprocessor->close(coprocessor->devc, COPR_MIDI); + module_put(coprocessor->owner); + } + devc->opened = 0; + devc->mode = 0; +} + +#define MIDI_SYNTH_NAME "MPU-401 UART Midi" +#define MIDI_SYNTH_CAPS SYNTH_CAP_INPUT +#include "midi_synth.h" + +static struct synth_operations mpu401_synth_proto = +{ + .owner = THIS_MODULE, + .id = "MPU401", + .info = NULL, + .midi_dev = 0, + .synth_type = SYNTH_TYPE_MIDI, + .synth_subtype = 0, + .open = mpu_synth_open, + .close = mpu_synth_close, + .ioctl = mpu_synth_ioctl, + .kill_note = midi_synth_kill_note, + .start_note = midi_synth_start_note, + .set_instr = midi_synth_set_instr, + .reset = midi_synth_reset, + .hw_control = midi_synth_hw_control, + .load_patch = midi_synth_load_patch, + .aftertouch = midi_synth_aftertouch, + .controller = midi_synth_controller, + .panning = midi_synth_panning, + .bender = midi_synth_bender, + .setup_voice = midi_synth_setup_voice, + .send_sysex = midi_synth_send_sysex +}; + +static struct synth_operations *mpu401_synth_operations[MAX_MIDI_DEV]; + +static struct midi_operations mpu401_midi_proto = +{ + .owner = THIS_MODULE, + .info = {"MPU-401 Midi", 0, MIDI_CAP_MPU401, SNDCARD_MPU401}, + .in_info = {0}, + .open = mpu401_open, + .close = mpu401_close, + .ioctl = mpu401_ioctl, + .outputc = mpu401_out, + .start_read = mpu401_start_read, + .end_read = mpu401_end_read, + .kick = mpu401_kick, + .buffer_status = mpu401_buffer_status, + .prefix_cmd = mpu401_prefix_cmd +}; + +static struct midi_operations mpu401_midi_operations[MAX_MIDI_DEV]; + +static void mpu401_chk_version(int n, struct mpu_config *devc) +{ + int tmp; + unsigned long flags; + + devc->version = devc->revision = 0; + + spin_lock_irqsave(&devc->lock,flags); + if ((tmp = mpu_cmd(n, 0xAC, 0)) < 0) + { + spin_unlock_irqrestore(&devc->lock,flags); + return; + } + if ((tmp & 0xf0) > 0x20) /* Why it's larger than 2.x ??? */ + { + spin_unlock_irqrestore(&devc->lock,flags); + return; + } + devc->version = tmp; + + if ((tmp = mpu_cmd(n, 0xAD, 0)) < 0) + { + devc->version = 0; + spin_unlock_irqrestore(&devc->lock,flags); + return; + } + devc->revision = tmp; + spin_unlock_irqrestore(&devc->lock,flags); +} + +int attach_mpu401(struct address_info *hw_config, struct module *owner) +{ + unsigned long flags; + char revision_char; + + int m, ret; + struct mpu_config *devc; + + hw_config->slots[1] = -1; + m = sound_alloc_mididev(); + if (m == -1) + { + printk(KERN_WARNING "MPU-401: Too many midi devices detected\n"); + ret = -ENOMEM; + goto out_err; + } + devc = &dev_conf[m]; + devc->base = hw_config->io_base; + devc->osp = hw_config->osp; + devc->irq = hw_config->irq; + devc->opened = 0; + devc->uart_mode = 0; + devc->initialized = 0; + devc->version = 0; + devc->revision = 0; + devc->capabilities = 0; + devc->timer_flag = 0; + devc->m_busy = 0; + devc->m_state = ST_INIT; + devc->shared_irq = hw_config->always_detect; + devc->irq = hw_config->irq; + spin_lock_init(&devc->lock); + + if (devc->irq < 0) + { + devc->irq *= -1; + devc->shared_irq = 1; + } + + if (!hw_config->always_detect) + { + /* Verify the hardware again */ + if (!reset_mpu401(devc)) + { + printk(KERN_WARNING "mpu401: Device didn't respond\n"); + ret = -ENODEV; + goto out_mididev; + } + if (!devc->shared_irq) + { + if (request_irq(devc->irq, mpuintr, 0, "mpu401", (void *)m) < 0) + { + printk(KERN_WARNING "mpu401: Failed to allocate IRQ%d\n", devc->irq); + ret = -ENOMEM; + goto out_mididev; + } + } + spin_lock_irqsave(&devc->lock,flags); + mpu401_chk_version(m, devc); + if (devc->version == 0) + mpu401_chk_version(m, devc); + spin_unlock_irqrestore(&devc->lock,flags); + } + + if (devc->version != 0) + if (mpu_cmd(m, 0xC5, 0) >= 0) /* Set timebase OK */ + if (mpu_cmd(m, 0xE0, 120) >= 0) /* Set tempo OK */ + devc->capabilities |= MPU_CAP_INTLG; /* Supports intelligent mode */ + + + mpu401_synth_operations[m] = (struct synth_operations *)kmalloc(sizeof(struct synth_operations), GFP_KERNEL); + + if (mpu401_synth_operations[m] == NULL) + { + printk(KERN_ERR "mpu401: Can't allocate memory\n"); + ret = -ENOMEM; + goto out_irq; + } + if (!(devc->capabilities & MPU_CAP_INTLG)) /* No intelligent mode */ + { + memcpy((char *) mpu401_synth_operations[m], + (char *) &std_midi_synth, + sizeof(struct synth_operations)); + } + else + { + memcpy((char *) mpu401_synth_operations[m], + (char *) &mpu401_synth_proto, + sizeof(struct synth_operations)); + } + if (owner) + mpu401_synth_operations[m]->owner = owner; + + memcpy((char *) &mpu401_midi_operations[m], + (char *) &mpu401_midi_proto, + sizeof(struct midi_operations)); + + mpu401_midi_operations[m].converter = mpu401_synth_operations[m]; + + memcpy((char *) &mpu_synth_info[m], + (char *) &mpu_synth_info_proto, + sizeof(struct synth_info)); + + n_mpu_devs++; + + if (devc->version == 0x20 && devc->revision >= 0x07) /* MusicQuest interface */ + { + int ports = (devc->revision & 0x08) ? 32 : 16; + + devc->capabilities |= MPU_CAP_SYNC | MPU_CAP_SMPTE | + MPU_CAP_CLS | MPU_CAP_2PORT; + + revision_char = (devc->revision == 0x7f) ? 'M' : ' '; + sprintf(mpu_synth_info[m].name, "MQX-%d%c MIDI Interface #%d", + ports, + revision_char, + n_mpu_devs); + } + else + { + revision_char = devc->revision ? devc->revision + '@' : ' '; + if ((int) devc->revision > ('Z' - '@')) + revision_char = '+'; + + devc->capabilities |= MPU_CAP_SYNC | MPU_CAP_FSK; + + if (hw_config->name) + sprintf(mpu_synth_info[m].name, "%s (MPU401)", hw_config->name); + else + sprintf(mpu_synth_info[m].name, + "MPU-401 %d.%d%c Midi interface #%d", + (int) (devc->version & 0xf0) >> 4, + devc->version & 0x0f, + revision_char, + n_mpu_devs); + } + + strcpy(mpu401_midi_operations[m].info.name, + mpu_synth_info[m].name); + + conf_printf(mpu_synth_info[m].name, hw_config); + + mpu401_synth_operations[m]->midi_dev = devc->devno = m; + mpu401_synth_operations[devc->devno]->info = &mpu_synth_info[devc->devno]; + + if (devc->capabilities & MPU_CAP_INTLG) /* Intelligent mode */ + hw_config->slots[2] = mpu_timer_init(m); + + midi_devs[m] = &mpu401_midi_operations[devc->devno]; + + if (owner) + midi_devs[m]->owner = owner; + + hw_config->slots[1] = m; + sequencer_init(); + + return 0; + +out_irq: + free_irq(devc->irq, (void *)m); +out_mididev: + sound_unload_mididev(m); +out_err: + release_region(hw_config->io_base, 2); + return ret; +} + +static int reset_mpu401(struct mpu_config *devc) +{ + unsigned long flags; + int ok, timeout, n; + int timeout_limit; + + /* + * Send the RESET command. Try again if no success at the first time. + * (If the device is in the UART mode, it will not ack the reset cmd). + */ + + ok = 0; + + timeout_limit = devc->initialized ? 30000 : 100000; + devc->initialized = 1; + + for (n = 0; n < 2 && !ok; n++) + { + for (timeout = timeout_limit; timeout > 0 && !ok; timeout--) + ok = output_ready(devc); + + write_command(devc, MPU_RESET); /* + * Send MPU-401 RESET Command + */ + + /* + * Wait at least 25 msec. This method is not accurate so let's make the + * loop bit longer. Cannot sleep since this is called during boot. + */ + + for (timeout = timeout_limit * 2; timeout > 0 && !ok; timeout--) + { + spin_lock_irqsave(&devc->lock,flags); + if (input_avail(devc)) + if (read_data(devc) == MPU_ACK) + ok = 1; + spin_unlock_irqrestore(&devc->lock,flags); + } + + } + + devc->m_state = ST_INIT; + devc->m_ptr = 0; + devc->m_left = 0; + devc->last_status = 0; + devc->uart_mode = 0; + + return ok; +} + +static void set_uart_mode(int dev, struct mpu_config *devc, int arg) +{ + if (!arg && (devc->capabilities & MPU_CAP_INTLG)) + return; + if ((devc->uart_mode == 0) == (arg == 0)) + return; /* Already set */ + reset_mpu401(devc); /* This exits the uart mode */ + + if (arg) + { + if (mpu_cmd(dev, UART_MODE_ON, 0) < 0) + { + printk(KERN_ERR "mpu401: Can't enter UART mode\n"); + devc->uart_mode = 0; + return; + } + } + devc->uart_mode = arg; + +} + +int probe_mpu401(struct address_info *hw_config, struct resource *ports) +{ + int ok = 0; + struct mpu_config tmp_devc; + + tmp_devc.base = hw_config->io_base; + tmp_devc.irq = hw_config->irq; + tmp_devc.initialized = 0; + tmp_devc.opened = 0; + tmp_devc.osp = hw_config->osp; + + if (hw_config->always_detect) + return 1; + + if (inb(hw_config->io_base + 1) == 0xff) + { + DDB(printk("MPU401: Port %x looks dead.\n", hw_config->io_base)); + return 0; /* Just bus float? */ + } + ok = reset_mpu401(&tmp_devc); + + if (!ok) + { + DDB(printk("MPU401: Reset failed on port %x\n", hw_config->io_base)); + } + return ok; +} + +void unload_mpu401(struct address_info *hw_config) +{ + void *p; + int n=hw_config->slots[1]; + + if (n != -1) { + release_region(hw_config->io_base, 2); + if (hw_config->always_detect == 0 && hw_config->irq > 0) + free_irq(hw_config->irq, (void *)n); + p=mpu401_synth_operations[n]; + sound_unload_mididev(n); + sound_unload_timerdev(hw_config->slots[2]); + if(p) + kfree(p); + } +} + +/***************************************************** + * Timer stuff + ****************************************************/ + +static volatile int timer_initialized = 0, timer_open = 0, tmr_running = 0; +static volatile int curr_tempo, curr_timebase, hw_timebase; +static int max_timebase = 8; /* 8*24=192 ppqn */ +static volatile unsigned long next_event_time; +static volatile unsigned long curr_ticks, curr_clocks; +static unsigned long prev_event_time; +static int metronome_mode; + +static unsigned long clocks2ticks(unsigned long clocks) +{ + /* + * The MPU-401 supports just a limited set of possible timebase values. + * Since the applications require more choices, the driver has to + * program the HW to do its best and to convert between the HW and + * actual timebases. + */ + return ((clocks * curr_timebase) + (hw_timebase / 2)) / hw_timebase; +} + +static void set_timebase(int midi_dev, int val) +{ + int hw_val; + + if (val < 48) + val = 48; + if (val > 1000) + val = 1000; + + hw_val = val; + hw_val = (hw_val + 12) / 24; + if (hw_val > max_timebase) + hw_val = max_timebase; + + if (mpu_cmd(midi_dev, 0xC0 | (hw_val & 0x0f), 0) < 0) + { + printk(KERN_WARNING "mpu401: Can't set HW timebase to %d\n", hw_val * 24); + return; + } + hw_timebase = hw_val * 24; + curr_timebase = val; + +} + +static void tmr_reset(struct mpu_config *devc) +{ + unsigned long flags; + + spin_lock_irqsave(&devc->lock,flags); + next_event_time = (unsigned long) -1; + prev_event_time = 0; + curr_ticks = curr_clocks = 0; + spin_unlock_irqrestore(&devc->lock,flags); +} + +static void set_timer_mode(int midi_dev) +{ + if (timer_mode & TMR_MODE_CLS) + mpu_cmd(midi_dev, 0x3c, 0); /* Use CLS sync */ + else if (timer_mode & TMR_MODE_SMPTE) + mpu_cmd(midi_dev, 0x3d, 0); /* Use SMPTE sync */ + + if (timer_mode & TMR_INTERNAL) + { + mpu_cmd(midi_dev, 0x80, 0); /* Use MIDI sync */ + } + else + { + if (timer_mode & (TMR_MODE_MIDI | TMR_MODE_CLS)) + { + mpu_cmd(midi_dev, 0x82, 0); /* Use MIDI sync */ + mpu_cmd(midi_dev, 0x91, 0); /* Enable ext MIDI ctrl */ + } + else if (timer_mode & TMR_MODE_FSK) + mpu_cmd(midi_dev, 0x81, 0); /* Use FSK sync */ + } +} + +static void stop_metronome(int midi_dev) +{ + mpu_cmd(midi_dev, 0x84, 0); /* Disable metronome */ +} + +static void setup_metronome(int midi_dev) +{ + int numerator, denominator; + int clks_per_click, num_32nds_per_beat; + int beats_per_measure; + + numerator = ((unsigned) metronome_mode >> 24) & 0xff; + denominator = ((unsigned) metronome_mode >> 16) & 0xff; + clks_per_click = ((unsigned) metronome_mode >> 8) & 0xff; + num_32nds_per_beat = (unsigned) metronome_mode & 0xff; + beats_per_measure = (numerator * 4) >> denominator; + + if (!metronome_mode) + mpu_cmd(midi_dev, 0x84, 0); /* Disable metronome */ + else + { + mpu_cmd(midi_dev, 0xE4, clks_per_click); + mpu_cmd(midi_dev, 0xE6, beats_per_measure); + mpu_cmd(midi_dev, 0x83, 0); /* Enable metronome without accents */ + } +} + +static int mpu_start_timer(int midi_dev) +{ + struct mpu_config *devc= &dev_conf[midi_dev]; + + tmr_reset(devc); + set_timer_mode(midi_dev); + + if (tmr_running) + return TIMER_NOT_ARMED; /* Already running */ + + if (timer_mode & TMR_INTERNAL) + { + mpu_cmd(midi_dev, 0x02, 0); /* Send MIDI start */ + tmr_running = 1; + return TIMER_NOT_ARMED; + } + else + { + mpu_cmd(midi_dev, 0x35, 0); /* Enable mode messages to PC */ + mpu_cmd(midi_dev, 0x38, 0); /* Enable sys common messages to PC */ + mpu_cmd(midi_dev, 0x39, 0); /* Enable real time messages to PC */ + mpu_cmd(midi_dev, 0x97, 0); /* Enable system exclusive messages to PC */ + } + return TIMER_ARMED; +} + +static int mpu_timer_open(int dev, int mode) +{ + int midi_dev = sound_timer_devs[dev]->devlink; + struct mpu_config *devc= &dev_conf[midi_dev]; + + if (timer_open) + return -EBUSY; + + tmr_reset(devc); + curr_tempo = 50; + mpu_cmd(midi_dev, 0xE0, 50); + curr_timebase = hw_timebase = 120; + set_timebase(midi_dev, 120); + timer_open = 1; + metronome_mode = 0; + set_timer_mode(midi_dev); + + mpu_cmd(midi_dev, 0xe7, 0x04); /* Send all clocks to host */ + mpu_cmd(midi_dev, 0x95, 0); /* Enable clock to host */ + + return 0; +} + +static void mpu_timer_close(int dev) +{ + int midi_dev = sound_timer_devs[dev]->devlink; + + timer_open = tmr_running = 0; + mpu_cmd(midi_dev, 0x15, 0); /* Stop all */ + mpu_cmd(midi_dev, 0x94, 0); /* Disable clock to host */ + mpu_cmd(midi_dev, 0x8c, 0); /* Disable measure end messages to host */ + stop_metronome(midi_dev); +} + +static int mpu_timer_event(int dev, unsigned char *event) +{ + unsigned char command = event[1]; + unsigned long parm = *(unsigned int *) &event[4]; + int midi_dev = sound_timer_devs[dev]->devlink; + + switch (command) + { + case TMR_WAIT_REL: + parm += prev_event_time; + case TMR_WAIT_ABS: + if (parm > 0) + { + long time; + + if (parm <= curr_ticks) /* It's the time */ + return TIMER_NOT_ARMED; + time = parm; + next_event_time = prev_event_time = time; + + return TIMER_ARMED; + } + break; + + case TMR_START: + if (tmr_running) + break; + return mpu_start_timer(midi_dev); + + case TMR_STOP: + mpu_cmd(midi_dev, 0x01, 0); /* Send MIDI stop */ + stop_metronome(midi_dev); + tmr_running = 0; + break; + + case TMR_CONTINUE: + if (tmr_running) + break; + mpu_cmd(midi_dev, 0x03, 0); /* Send MIDI continue */ + setup_metronome(midi_dev); + tmr_running = 1; + break; + + case TMR_TEMPO: + if (parm) + { + if (parm < 8) + parm = 8; + if (parm > 250) + parm = 250; + if (mpu_cmd(midi_dev, 0xE0, parm) < 0) + printk(KERN_WARNING "mpu401: Can't set tempo to %d\n", (int) parm); + curr_tempo = parm; + } + break; + + case TMR_ECHO: + seq_copy_to_input(event, 8); + break; + + case TMR_TIMESIG: + if (metronome_mode) /* Metronome enabled */ + { + metronome_mode = parm; + setup_metronome(midi_dev); + } + break; + + default:; + } + return TIMER_NOT_ARMED; +} + +static unsigned long mpu_timer_get_time(int dev) +{ + if (!timer_open) + return 0; + + return curr_ticks; +} + +static int mpu_timer_ioctl(int dev, unsigned int command, void __user *arg) +{ + int midi_dev = sound_timer_devs[dev]->devlink; + int __user *p = (int __user *)arg; + + switch (command) + { + case SNDCTL_TMR_SOURCE: + { + int parm; + + if (get_user(parm, p)) + return -EFAULT; + parm &= timer_caps; + + if (parm != 0) + { + timer_mode = parm; + + if (timer_mode & TMR_MODE_CLS) + mpu_cmd(midi_dev, 0x3c, 0); /* Use CLS sync */ + else if (timer_mode & TMR_MODE_SMPTE) + mpu_cmd(midi_dev, 0x3d, 0); /* Use SMPTE sync */ + } + if (put_user(timer_mode, p)) + return -EFAULT; + return timer_mode; + } + break; + + case SNDCTL_TMR_START: + mpu_start_timer(midi_dev); + return 0; + + case SNDCTL_TMR_STOP: + tmr_running = 0; + mpu_cmd(midi_dev, 0x01, 0); /* Send MIDI stop */ + stop_metronome(midi_dev); + return 0; + + case SNDCTL_TMR_CONTINUE: + if (tmr_running) + return 0; + tmr_running = 1; + mpu_cmd(midi_dev, 0x03, 0); /* Send MIDI continue */ + return 0; + + case SNDCTL_TMR_TIMEBASE: + { + int val; + if (get_user(val, p)) + return -EFAULT; + if (val) + set_timebase(midi_dev, val); + if (put_user(curr_timebase, p)) + return -EFAULT; + return curr_timebase; + } + break; + + case SNDCTL_TMR_TEMPO: + { + int val; + int ret; + + if (get_user(val, p)) + return -EFAULT; + + if (val) + { + if (val < 8) + val = 8; + if (val > 250) + val = 250; + if ((ret = mpu_cmd(midi_dev, 0xE0, val)) < 0) + { + printk(KERN_WARNING "mpu401: Can't set tempo to %d\n", (int) val); + return ret; + } + curr_tempo = val; + } + if (put_user(curr_tempo, p)) + return -EFAULT; + return curr_tempo; + } + break; + + case SNDCTL_SEQ_CTRLRATE: + { + int val; + if (get_user(val, p)) + return -EFAULT; + + if (val != 0) /* Can't change */ + return -EINVAL; + val = ((curr_tempo * curr_timebase) + 30)/60; + if (put_user(val, p)) + return -EFAULT; + return val; + } + break; + + case SNDCTL_SEQ_GETTIME: + if (put_user(curr_ticks, p)) + return -EFAULT; + return curr_ticks; + + case SNDCTL_TMR_METRONOME: + if (get_user(metronome_mode, p)) + return -EFAULT; + setup_metronome(midi_dev); + return 0; + + default:; + } + return -EINVAL; +} + +static void mpu_timer_arm(int dev, long time) +{ + if (time < 0) + time = curr_ticks + 1; + else if (time <= curr_ticks) /* It's the time */ + return; + next_event_time = prev_event_time = time; + return; +} + +static struct sound_timer_operations mpu_timer = +{ + .owner = THIS_MODULE, + .info = {"MPU-401 Timer", 0}, + .priority = 10, /* Priority */ + .devlink = 0, /* Local device link */ + .open = mpu_timer_open, + .close = mpu_timer_close, + .event = mpu_timer_event, + .get_time = mpu_timer_get_time, + .ioctl = mpu_timer_ioctl, + .arm_timer = mpu_timer_arm +}; + +static void mpu_timer_interrupt(void) +{ + if (!timer_open) + return; + + if (!tmr_running) + return; + + curr_clocks++; + curr_ticks = clocks2ticks(curr_clocks); + + if (curr_ticks >= next_event_time) + { + next_event_time = (unsigned long) -1; + sequencer_timer(0); + } +} + +static void timer_ext_event(struct mpu_config *devc, int event, int parm) +{ + int midi_dev = devc->devno; + + if (!devc->timer_flag) + return; + + switch (event) + { + case TMR_CLOCK: + printk("<MIDI clk>"); + break; + + case TMR_START: + printk("Ext MIDI start\n"); + if (!tmr_running) + { + if (timer_mode & TMR_EXTERNAL) + { + tmr_running = 1; + setup_metronome(midi_dev); + next_event_time = 0; + STORE(SEQ_START_TIMER()); + } + } + break; + + case TMR_STOP: + printk("Ext MIDI stop\n"); + if (timer_mode & TMR_EXTERNAL) + { + tmr_running = 0; + stop_metronome(midi_dev); + STORE(SEQ_STOP_TIMER()); + } + break; + + case TMR_CONTINUE: + printk("Ext MIDI continue\n"); + if (timer_mode & TMR_EXTERNAL) + { + tmr_running = 1; + setup_metronome(midi_dev); + STORE(SEQ_CONTINUE_TIMER()); + } + break; + + case TMR_SPP: + printk("Songpos: %d\n", parm); + if (timer_mode & TMR_EXTERNAL) + { + STORE(SEQ_SONGPOS(parm)); + } + break; + } +} + +static int mpu_timer_init(int midi_dev) +{ + struct mpu_config *devc; + int n; + + devc = &dev_conf[midi_dev]; + + if (timer_initialized) + return -1; /* There is already a similar timer */ + + timer_initialized = 1; + + mpu_timer.devlink = midi_dev; + dev_conf[midi_dev].timer_flag = 1; + + n = sound_alloc_timerdev(); + if (n == -1) + n = 0; + sound_timer_devs[n] = &mpu_timer; + + if (devc->version < 0x20) /* Original MPU-401 */ + timer_caps = TMR_INTERNAL | TMR_EXTERNAL | TMR_MODE_FSK | TMR_MODE_MIDI; + else + { + /* + * The version number 2.0 is used (at least) by the + * MusicQuest cards and the Roland Super-MPU. + * + * MusicQuest has given a special meaning to the bits of the + * revision number. The Super-MPU returns 0. + */ + + if (devc->revision) + timer_caps |= TMR_EXTERNAL | TMR_MODE_MIDI; + + if (devc->revision & 0x02) + timer_caps |= TMR_MODE_CLS; + + + if (devc->revision & 0x40) + max_timebase = 10; /* Has the 216 and 240 ppqn modes */ + } + + timer_mode = (TMR_INTERNAL | TMR_MODE_MIDI) & timer_caps; + return n; + +} + +EXPORT_SYMBOL(probe_mpu401); +EXPORT_SYMBOL(attach_mpu401); +EXPORT_SYMBOL(unload_mpu401); +EXPORT_SYMBOL(intchk_mpu401); +EXPORT_SYMBOL(mpuintr); + +static struct address_info cfg; + +static int io = -1; +static int irq = -1; + +module_param(irq, int, 0); +module_param(io, int, 0); + +static int __init init_mpu401(void) +{ + int ret; + /* Can be loaded either for module use or to provide functions + to others */ + if (io != -1 && irq != -1) { + struct resource *ports; + cfg.irq = irq; + cfg.io_base = io; + ports = request_region(io, 2, "mpu401"); + if (!ports) + return -EBUSY; + if (probe_mpu401(&cfg, ports) == 0) { + release_region(io, 2); + return -ENODEV; + } + if ((ret = attach_mpu401(&cfg, THIS_MODULE))) + return ret; + } + + return 0; +} + +static void __exit cleanup_mpu401(void) +{ + if (io != -1 && irq != -1) { + /* Check for use by, for example, sscape driver */ + unload_mpu401(&cfg); + } +} + +module_init(init_mpu401); +module_exit(cleanup_mpu401); + +#ifndef MODULE +static int __init setup_mpu401(char *str) +{ + /* io, irq */ + int ints[3]; + + str = get_options(str, ARRAY_SIZE(ints), ints); + + io = ints[1]; + irq = ints[2]; + + return 1; +} + +__setup("mpu401=", setup_mpu401); +#endif +MODULE_LICENSE("GPL"); |