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 spinlock_t midi_spinlock __attribute((unused)) = SPIN_LOCK_UNLOCKED;
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;
326 DPD(4, "emu10k1_midi_write(), count=%#x\n", (u32) count);
328 if (!access_ok(VERIFY_READ, buffer, count))
331 if ((midihdr = (struct midi_hdr *) kmalloc(sizeof(struct midi_hdr), GFP_KERNEL)) == NULL)
334 midihdr->bufferlength = count;
335 midihdr->bytesrecorded = 0;
338 if ((midihdr->data = (u8 *) kmalloc(count, GFP_KERNEL)) == NULL) {
344 if (copy_from_user(midihdr->data, buffer, count)) {
345 kfree(midihdr->data);
347 return ret ? ret : -EFAULT;
350 spin_lock_irqsave(&midi_spinlock, flags);
352 if (emu10k1_mpuout_add_buffer(midi_dev->card, midihdr) < 0) {
354 kfree(midihdr->data);
356 spin_unlock_irqrestore(&midi_spinlock, flags);
360 spin_unlock_irqrestore(&midi_spinlock, flags);
365 static unsigned int emu10k1_midi_poll(struct file *file, struct poll_table_struct *wait)
367 struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data;
369 unsigned int mask = 0;
371 DPF(4, "emu10k1_midi_poll() called\n");
373 if (file->f_mode & FMODE_WRITE)
374 poll_wait(file, &midi_dev->oWait, wait);
376 if (file->f_mode & FMODE_READ)
377 poll_wait(file, &midi_dev->iWait, wait);
379 spin_lock_irqsave(&midi_spinlock, flags);
381 if (file->f_mode & FMODE_WRITE)
382 mask |= POLLOUT | POLLWRNORM;
384 if (file->f_mode & FMODE_READ) {
385 if (midi_dev->mistate == MIDIIN_STATE_STARTED)
386 if (midi_dev->icnt > 0)
387 mask |= POLLIN | POLLRDNORM;
390 spin_unlock_irqrestore(&midi_spinlock, flags);
395 int emu10k1_midi_callback(unsigned long msg, unsigned long refdata, unsigned long *pmsg)
397 struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) refdata;
398 struct midi_hdr *midihdr = NULL;
402 DPF(4, "emu10k1_midi_callback()\n");
404 spin_lock_irqsave(&midi_spinlock, flags);
407 case ICARDMIDI_OUTLONGDATA:
408 midihdr = (struct midi_hdr *) pmsg[2];
410 kfree(midihdr->data);
412 wake_up_interruptible(&midi_dev->oWait);
416 case ICARDMIDI_INLONGDATA:
417 midihdr = (struct midi_hdr *) pmsg[2];
419 for (i = 0; i < midihdr->bytesrecorded; i++) {
420 midi_dev->iBuf[midi_dev->iwr++] = midihdr->data[i];
421 midi_dev->iwr %= MIDIIN_BUFLEN;
424 midi_dev->icnt += midihdr->bytesrecorded;
426 if (midi_dev->mistate == MIDIIN_STATE_STARTED) {
427 init_midi_hdr(midihdr);
428 emu10k1_mpuin_add_buffer(midi_dev->card->mpuin, midihdr);
429 wake_up_interruptible(&midi_dev->iWait);
433 case ICARDMIDI_INDATA:
435 u8 *pBuf = (u8 *) & pmsg[1];
436 u16 bytesvalid = pmsg[2];
438 for (i = 0; i < bytesvalid; i++) {
439 midi_dev->iBuf[midi_dev->iwr++] = pBuf[i];
440 midi_dev->iwr %= MIDIIN_BUFLEN;
443 midi_dev->icnt += bytesvalid;
446 wake_up_interruptible(&midi_dev->iWait);
449 default: /* Unknown message */
450 spin_unlock_irqrestore(&midi_spinlock, flags);
454 spin_unlock_irqrestore(&midi_spinlock, flags);
459 /* MIDI file operations */
460 struct file_operations emu10k1_midi_fops = {
461 .owner = THIS_MODULE,
462 .read = emu10k1_midi_read,
463 .write = emu10k1_midi_write,
464 .poll = emu10k1_midi_poll,
465 .open = emu10k1_midi_open,
466 .release = emu10k1_midi_release,
470 #ifdef EMU10K1_SEQUENCER
472 /* functions used for sequencer access */
474 int emu10k1_seq_midi_open(int dev, int mode,
475 void (*input) (int dev, unsigned char data),
476 void (*output) (int dev))
478 struct emu10k1_card *card;
479 struct midi_openinfo dsCardMidiOpenInfo;
480 struct emu10k1_mididevice *midi_dev;
482 if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL)
485 card = midi_devs[dev]->devc;
487 if (card->open_mode) /* card is opened native */
490 DPF(2, "emu10k1_seq_midi_open()\n");
492 if ((midi_dev = (struct emu10k1_mididevice *) kmalloc(sizeof(*midi_dev), GFP_KERNEL)) == NULL)
495 midi_dev->card = card;
496 midi_dev->mistate = MIDIIN_STATE_STOPPED;
497 init_waitqueue_head(&midi_dev->oWait);
498 init_waitqueue_head(&midi_dev->iWait);
502 INIT_LIST_HEAD(&midi_dev->mid_hdrs);
504 dsCardMidiOpenInfo.refdata = (unsigned long) midi_dev;
506 if (emu10k1_mpuout_open(card, &dsCardMidiOpenInfo) < 0) {
511 card->seq_mididev = midi_dev;
516 void emu10k1_seq_midi_close(int dev)
518 struct emu10k1_card *card;
520 DPF(2, "emu10k1_seq_midi_close()\n");
521 if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL)
524 card = midi_devs[dev]->devc;
525 emu10k1_mpuout_close(card);
527 if (card->seq_mididev) {
528 kfree(card->seq_mididev);
529 card->seq_mididev = NULL;
533 int emu10k1_seq_midi_out(int dev, unsigned char midi_byte)
535 struct emu10k1_card *card;
536 struct midi_hdr *midihdr;
539 if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL)
542 card = midi_devs[dev]->devc;
544 if ((midihdr = (struct midi_hdr *) kmalloc(sizeof(struct midi_hdr), GFP_KERNEL)) == NULL)
547 midihdr->bufferlength = 1;
548 midihdr->bytesrecorded = 0;
551 if ((midihdr->data = (u8 *) kmalloc(1, GFP_KERNEL)) == NULL) {
557 *(midihdr->data) = midi_byte;
559 spin_lock_irqsave(&midi_spinlock, flags);
561 if (emu10k1_mpuout_add_buffer(card, midihdr) < 0) {
563 kfree(midihdr->data);
565 spin_unlock_irqrestore(&midi_spinlock, flags);
569 spin_unlock_irqrestore(&midi_spinlock, flags);
574 int emu10k1_seq_midi_start_read(int dev)
579 int emu10k1_seq_midi_end_read(int dev)
584 void emu10k1_seq_midi_kick(int dev)
588 int emu10k1_seq_midi_buffer_status(int dev)
591 struct midi_queue *queue;
592 struct emu10k1_card *card;
594 if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL)
599 card = midi_devs[dev]->devc;
600 queue = card->mpuout->firstmidiq;
602 while (queue != NULL) {
604 if (queue == card->mpuout->lastmidiq)