2 **********************************************************************
3 * midi.c - /dev/midi interface for emu10k1 driver
4 * Copyright 1999, 2000 Creative Labs, Inc.
6 **********************************************************************
8 * Date Author Summary of changes
9 * ---- ------ ------------------
10 * October 20, 1999 Bertrand Lee base code release
12 **********************************************************************
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public
25 * License along with this program; if not, write to the Free
26 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
29 **********************************************************************
32 #include <linux/module.h>
33 #include <linux/poll.h>
34 #include <linux/slab.h>
35 #include <linux/sched.h>
36 #include <linux/smp_lock.h>
37 #include <asm/uaccess.h>
44 #ifdef EMU10K1_SEQUENCER
45 #include "../sound_config.h"
48 static DEFINE_SPINLOCK(midi_spinlock __attribute((unused)));
50 static void init_midi_hdr(struct midi_hdr *midihdr)
52 midihdr->bufferlength = MIDIIN_BUFLEN;
53 midihdr->bytesrecorded = 0;
57 static int midiin_add_buffer(struct emu10k1_mididevice *midi_dev, struct midi_hdr **midihdrptr)
59 struct midi_hdr *midihdr;
61 if ((midihdr = (struct midi_hdr *) kmalloc(sizeof(struct midi_hdr), GFP_KERNEL)) == NULL) {
66 init_midi_hdr(midihdr);
68 if ((midihdr->data = (u8 *) kmalloc(MIDIIN_BUFLEN, GFP_KERNEL)) == NULL) {
74 if (emu10k1_mpuin_add_buffer(midi_dev->card->mpuin, midihdr) < 0) {
81 *midihdrptr = midihdr;
82 list_add_tail(&midihdr->list, &midi_dev->mid_hdrs);
87 static int emu10k1_midi_open(struct inode *inode, struct file *file)
89 int minor = iminor(inode);
90 struct emu10k1_card *card = NULL;
91 struct emu10k1_mididevice *midi_dev;
92 struct list_head *entry;
94 DPF(2, "emu10k1_midi_open()\n");
96 /* Check for correct device to open */
97 list_for_each(entry, &emu10k1_devs) {
98 card = list_entry(entry, struct emu10k1_card, list);
100 if (card->midi_dev == minor)
107 #ifdef EMU10K1_SEQUENCER
108 if (card->seq_mididev) /* card is opened by sequencer */
112 /* Wait for device to become free */
113 down(&card->open_sem);
114 while (card->open_mode & (file->f_mode << FMODE_MIDI_SHIFT)) {
115 if (file->f_flags & O_NONBLOCK) {
121 interruptible_sleep_on(&card->open_wait);
123 if (signal_pending(current)) {
127 down(&card->open_sem);
130 if ((midi_dev = (struct emu10k1_mididevice *) kmalloc(sizeof(*midi_dev), GFP_KERNEL)) == NULL)
133 midi_dev->card = card;
134 midi_dev->mistate = MIDIIN_STATE_STOPPED;
135 init_waitqueue_head(&midi_dev->oWait);
136 init_waitqueue_head(&midi_dev->iWait);
140 INIT_LIST_HEAD(&midi_dev->mid_hdrs);
142 if (file->f_mode & FMODE_READ) {
143 struct midi_openinfo dsCardMidiOpenInfo;
144 struct midi_hdr *midihdr1;
145 struct midi_hdr *midihdr2;
147 dsCardMidiOpenInfo.refdata = (unsigned long) midi_dev;
149 if (emu10k1_mpuin_open(card, &dsCardMidiOpenInfo) < 0) {
155 /* Add two buffers to receive sysex buffer */
156 if (midiin_add_buffer(midi_dev, &midihdr1) < 0) {
161 if (midiin_add_buffer(midi_dev, &midihdr2) < 0) {
162 list_del(&midihdr1->list);
163 kfree(midihdr1->data);
170 if (file->f_mode & FMODE_WRITE) {
171 struct midi_openinfo dsCardMidiOpenInfo;
173 dsCardMidiOpenInfo.refdata = (unsigned long) midi_dev;
175 if (emu10k1_mpuout_open(card, &dsCardMidiOpenInfo) < 0) {
182 file->private_data = (void *) midi_dev;
184 card->open_mode |= (file->f_mode << FMODE_MIDI_SHIFT) & (FMODE_MIDI_READ | FMODE_MIDI_WRITE);
188 return nonseekable_open(inode, file);
191 static int emu10k1_midi_release(struct inode *inode, struct file *file)
193 struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data;
194 struct emu10k1_card *card;
198 card = midi_dev->card;
199 DPF(2, "emu10k1_midi_release()\n");
201 if (file->f_mode & FMODE_WRITE) {
202 if (!(file->f_flags & O_NONBLOCK)) {
204 while (!signal_pending(current) && (card->mpuout->firstmidiq != NULL)) {
205 DPF(4, "Cannot close - buffers not empty\n");
207 interruptible_sleep_on(&midi_dev->oWait);
212 emu10k1_mpuout_close(card);
215 if (file->f_mode & FMODE_READ) {
216 struct midi_hdr *midihdr;
218 if (midi_dev->mistate == MIDIIN_STATE_STARTED) {
219 emu10k1_mpuin_stop(card);
220 midi_dev->mistate = MIDIIN_STATE_STOPPED;
223 emu10k1_mpuin_reset(card);
224 emu10k1_mpuin_close(card);
226 while (!list_empty(&midi_dev->mid_hdrs)) {
227 midihdr = list_entry(midi_dev->mid_hdrs.next, struct midi_hdr, list);
229 list_del(midi_dev->mid_hdrs.next);
230 kfree(midihdr->data);
237 down(&card->open_sem);
238 card->open_mode &= ~((file->f_mode << FMODE_MIDI_SHIFT) & (FMODE_MIDI_READ | FMODE_MIDI_WRITE));
240 wake_up_interruptible(&card->open_wait);
247 static ssize_t emu10k1_midi_read(struct file *file, char __user *buffer, size_t count, loff_t * pos)
249 struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data;
254 DPD(4, "emu10k1_midi_read(), count %#x\n", (u32) count);
256 if (!access_ok(VERIFY_WRITE, buffer, count))
259 if (midi_dev->mistate == MIDIIN_STATE_STOPPED) {
260 if (emu10k1_mpuin_start(midi_dev->card) < 0) {
265 midi_dev->mistate = MIDIIN_STATE_STARTED;
269 cnt = MIDIIN_BUFLEN - midi_dev->ird;
271 spin_lock_irqsave(&midi_spinlock, flags);
273 if (midi_dev->icnt < cnt)
274 cnt = midi_dev->icnt;
276 spin_unlock_irqrestore(&midi_spinlock, flags);
282 if (file->f_flags & O_NONBLOCK)
283 return ret ? ret : -EAGAIN;
284 DPF(2, " Go to sleep...\n");
286 interruptible_sleep_on(&midi_dev->iWait);
288 if (signal_pending(current))
289 return ret ? ret : -ERESTARTSYS;
294 if (copy_to_user(buffer, midi_dev->iBuf + midi_dev->ird, cnt)) {
296 return ret ? ret : -EFAULT;
299 midi_dev->ird += cnt;
300 midi_dev->ird %= MIDIIN_BUFLEN;
302 spin_lock_irqsave(&midi_spinlock, flags);
304 midi_dev->icnt -= cnt;
306 spin_unlock_irqrestore(&midi_spinlock, flags);
312 if (midi_dev->icnt == 0)
319 static ssize_t emu10k1_midi_write(struct file *file, const char __user *buffer, size_t count, loff_t * pos)
321 struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data;
322 struct midi_hdr *midihdr;
325 DPD(4, "emu10k1_midi_write(), count=%#x\n", (u32) count);
327 if (!access_ok(VERIFY_READ, buffer, count))
330 if ((midihdr = (struct midi_hdr *) kmalloc(sizeof(struct midi_hdr), GFP_KERNEL)) == NULL)
333 midihdr->bufferlength = count;
334 midihdr->bytesrecorded = 0;
337 if ((midihdr->data = (u8 *) kmalloc(count, GFP_KERNEL)) == NULL) {
343 if (copy_from_user(midihdr->data, buffer, count)) {
344 kfree(midihdr->data);
349 spin_lock_irqsave(&midi_spinlock, flags);
351 if (emu10k1_mpuout_add_buffer(midi_dev->card, midihdr) < 0) {
353 kfree(midihdr->data);
355 spin_unlock_irqrestore(&midi_spinlock, flags);
359 spin_unlock_irqrestore(&midi_spinlock, flags);
364 static unsigned int emu10k1_midi_poll(struct file *file, struct poll_table_struct *wait)
366 struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data;
368 unsigned int mask = 0;
370 DPF(4, "emu10k1_midi_poll() called\n");
372 if (file->f_mode & FMODE_WRITE)
373 poll_wait(file, &midi_dev->oWait, wait);
375 if (file->f_mode & FMODE_READ)
376 poll_wait(file, &midi_dev->iWait, wait);
378 spin_lock_irqsave(&midi_spinlock, flags);
380 if (file->f_mode & FMODE_WRITE)
381 mask |= POLLOUT | POLLWRNORM;
383 if (file->f_mode & FMODE_READ) {
384 if (midi_dev->mistate == MIDIIN_STATE_STARTED)
385 if (midi_dev->icnt > 0)
386 mask |= POLLIN | POLLRDNORM;
389 spin_unlock_irqrestore(&midi_spinlock, flags);
394 int emu10k1_midi_callback(unsigned long msg, unsigned long refdata, unsigned long *pmsg)
396 struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) refdata;
397 struct midi_hdr *midihdr = NULL;
401 DPF(4, "emu10k1_midi_callback()\n");
403 spin_lock_irqsave(&midi_spinlock, flags);
406 case ICARDMIDI_OUTLONGDATA:
407 midihdr = (struct midi_hdr *) pmsg[2];
409 kfree(midihdr->data);
411 wake_up_interruptible(&midi_dev->oWait);
415 case ICARDMIDI_INLONGDATA:
416 midihdr = (struct midi_hdr *) pmsg[2];
418 for (i = 0; i < midihdr->bytesrecorded; i++) {
419 midi_dev->iBuf[midi_dev->iwr++] = midihdr->data[i];
420 midi_dev->iwr %= MIDIIN_BUFLEN;
423 midi_dev->icnt += midihdr->bytesrecorded;
425 if (midi_dev->mistate == MIDIIN_STATE_STARTED) {
426 init_midi_hdr(midihdr);
427 emu10k1_mpuin_add_buffer(midi_dev->card->mpuin, midihdr);
428 wake_up_interruptible(&midi_dev->iWait);
432 case ICARDMIDI_INDATA:
434 u8 *pBuf = (u8 *) & pmsg[1];
435 u16 bytesvalid = pmsg[2];
437 for (i = 0; i < bytesvalid; i++) {
438 midi_dev->iBuf[midi_dev->iwr++] = pBuf[i];
439 midi_dev->iwr %= MIDIIN_BUFLEN;
442 midi_dev->icnt += bytesvalid;
445 wake_up_interruptible(&midi_dev->iWait);
448 default: /* Unknown message */
449 spin_unlock_irqrestore(&midi_spinlock, flags);
453 spin_unlock_irqrestore(&midi_spinlock, flags);
458 /* MIDI file operations */
459 struct file_operations emu10k1_midi_fops = {
460 .owner = THIS_MODULE,
461 .read = emu10k1_midi_read,
462 .write = emu10k1_midi_write,
463 .poll = emu10k1_midi_poll,
464 .open = emu10k1_midi_open,
465 .release = emu10k1_midi_release,
469 #ifdef EMU10K1_SEQUENCER
471 /* functions used for sequencer access */
473 int emu10k1_seq_midi_open(int dev, int mode,
474 void (*input) (int dev, unsigned char data),
475 void (*output) (int dev))
477 struct emu10k1_card *card;
478 struct midi_openinfo dsCardMidiOpenInfo;
479 struct emu10k1_mididevice *midi_dev;
481 if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL)
484 card = midi_devs[dev]->devc;
486 if (card->open_mode) /* card is opened native */
489 DPF(2, "emu10k1_seq_midi_open()\n");
491 if ((midi_dev = (struct emu10k1_mididevice *) kmalloc(sizeof(*midi_dev), GFP_KERNEL)) == NULL)
494 midi_dev->card = card;
495 midi_dev->mistate = MIDIIN_STATE_STOPPED;
496 init_waitqueue_head(&midi_dev->oWait);
497 init_waitqueue_head(&midi_dev->iWait);
501 INIT_LIST_HEAD(&midi_dev->mid_hdrs);
503 dsCardMidiOpenInfo.refdata = (unsigned long) midi_dev;
505 if (emu10k1_mpuout_open(card, &dsCardMidiOpenInfo) < 0) {
510 card->seq_mididev = midi_dev;
515 void emu10k1_seq_midi_close(int dev)
517 struct emu10k1_card *card;
519 DPF(2, "emu10k1_seq_midi_close()\n");
520 if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL)
523 card = midi_devs[dev]->devc;
524 emu10k1_mpuout_close(card);
526 if (card->seq_mididev) {
527 kfree(card->seq_mididev);
528 card->seq_mididev = NULL;
532 int emu10k1_seq_midi_out(int dev, unsigned char midi_byte)
534 struct emu10k1_card *card;
535 struct midi_hdr *midihdr;
538 if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL)
541 card = midi_devs[dev]->devc;
543 if ((midihdr = (struct midi_hdr *) kmalloc(sizeof(struct midi_hdr), GFP_KERNEL)) == NULL)
546 midihdr->bufferlength = 1;
547 midihdr->bytesrecorded = 0;
550 if ((midihdr->data = (u8 *) kmalloc(1, GFP_KERNEL)) == NULL) {
556 *(midihdr->data) = midi_byte;
558 spin_lock_irqsave(&midi_spinlock, flags);
560 if (emu10k1_mpuout_add_buffer(card, midihdr) < 0) {
562 kfree(midihdr->data);
564 spin_unlock_irqrestore(&midi_spinlock, flags);
568 spin_unlock_irqrestore(&midi_spinlock, flags);
573 int emu10k1_seq_midi_start_read(int dev)
578 int emu10k1_seq_midi_end_read(int dev)
583 void emu10k1_seq_midi_kick(int dev)
587 int emu10k1_seq_midi_buffer_status(int dev)
590 struct midi_queue *queue;
591 struct emu10k1_card *card;
593 if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL)
598 card = midi_devs[dev]->devc;
599 queue = card->mpuout->firstmidiq;
601 while (queue != NULL) {
603 if (queue == card->mpuout->lastmidiq)