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[PATCH] fuse: check for invalid node ID in fuse_create_open()
[linux-2.6/mini2440.git] / sound / oss / emu10k1 / midi.c
blobb40b5f97aacea3a5240b845e10745dcc77c22cf3
1 /*
2 **********************************************************************
3 * midi.c - /dev/midi interface for emu10k1 driver
4 * Copyright 1999, 2000 Creative Labs, Inc.
5 *
6 **********************************************************************
7 *
8 * Date Author Summary of changes
9 * ---- ------ ------------------
10 * October 20, 1999 Bertrand Lee base code release
11 *
12 **********************************************************************
13 *
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.
18 *
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.
23 *
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,
27 * USA.
28 *
29 **********************************************************************
30 */
31
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>
38
39 #include "hwaccess.h"
40 #include "cardmo.h"
41 #include "cardmi.h"
42 #include "midi.h"
43
44 #ifdef EMU10K1_SEQUENCER
45 #include "../sound_config.h"
46 #endif
47
48 static DEFINE_SPINLOCK(midi_spinlock __attribute((unused)));
49
50 static void init_midi_hdr(struct midi_hdr *midihdr)
51 {
52 midihdr->bufferlength = MIDIIN_BUFLEN;
53 midihdr->bytesrecorded = 0;
54 midihdr->flags = 0;
55 }
56
57 static int midiin_add_buffer(struct emu10k1_mididevice *midi_dev, struct midi_hdr **midihdrptr)
58 {
59 struct midi_hdr *midihdr;
60
61 if ((midihdr = (struct midi_hdr *) kmalloc(sizeof(struct midi_hdr), GFP_KERNEL)) == NULL) {
62 ERROR();
63 return -EINVAL;
64 }
65
66 init_midi_hdr(midihdr);
67
68 if ((midihdr->data = (u8 *) kmalloc(MIDIIN_BUFLEN, GFP_KERNEL)) == NULL) {
69 ERROR();
70 kfree(midihdr);
71 return -1;
72 }
73
74 if (emu10k1_mpuin_add_buffer(midi_dev->card->mpuin, midihdr) < 0) {
75 ERROR();
76 kfree(midihdr->data);
77 kfree(midihdr);
78 return -1;
79 }
80
81 *midihdrptr = midihdr;
82 list_add_tail(&midihdr->list, &midi_dev->mid_hdrs);
83
84 return 0;
85 }
86
87 static int emu10k1_midi_open(struct inode *inode, struct file *file)
88 {
89 int minor = iminor(inode);
90 struct emu10k1_card *card = NULL;
91 struct emu10k1_mididevice *midi_dev;
92 struct list_head *entry;
93
94 DPF(2, "emu10k1_midi_open()\n");
95
96 /* Check for correct device to open */
97 list_for_each(entry, &emu10k1_devs) {
98 card = list_entry(entry, struct emu10k1_card, list);
99
100 if (card->midi_dev == minor)
101 goto match;
102 }
103
104 return -ENODEV;
105
106 match:
107 #ifdef EMU10K1_SEQUENCER
108 if (card->seq_mididev) /* card is opened by sequencer */
109 return -EBUSY;
110 #endif
111
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) {
116 up(&card->open_sem);
117 return -EBUSY;
118 }
119
120 up(&card->open_sem);
121 interruptible_sleep_on(&card->open_wait);
122
123 if (signal_pending(current)) {
124 return -ERESTARTSYS;
125 }
126
127 down(&card->open_sem);
128 }
129
130 if ((midi_dev = (struct emu10k1_mididevice *) kmalloc(sizeof(*midi_dev), GFP_KERNEL)) == NULL)
131 return -EINVAL;
132
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);
137 midi_dev->ird = 0;
138 midi_dev->iwr = 0;
139 midi_dev->icnt = 0;
140 INIT_LIST_HEAD(&midi_dev->mid_hdrs);
141
142 if (file->f_mode & FMODE_READ) {
143 struct midi_openinfo dsCardMidiOpenInfo;
144 struct midi_hdr *midihdr1;
145 struct midi_hdr *midihdr2;
146
147 dsCardMidiOpenInfo.refdata = (unsigned long) midi_dev;
148
149 if (emu10k1_mpuin_open(card, &dsCardMidiOpenInfo) < 0) {
150 ERROR();
151 kfree(midi_dev);
152 return -ENODEV;
153 }
154
155 /* Add two buffers to receive sysex buffer */
156 if (midiin_add_buffer(midi_dev, &midihdr1) < 0) {
157 kfree(midi_dev);
158 return -ENODEV;
159 }
160
161 if (midiin_add_buffer(midi_dev, &midihdr2) < 0) {
162 list_del(&midihdr1->list);
163 kfree(midihdr1->data);
164 kfree(midihdr1);
165 kfree(midi_dev);
166 return -ENODEV;
167 }
168 }
169
170 if (file->f_mode & FMODE_WRITE) {
171 struct midi_openinfo dsCardMidiOpenInfo;
172
173 dsCardMidiOpenInfo.refdata = (unsigned long) midi_dev;
174
175 if (emu10k1_mpuout_open(card, &dsCardMidiOpenInfo) < 0) {
176 ERROR();
177 kfree(midi_dev);
178 return -ENODEV;
179 }
180 }
181
182 file->private_data = (void *) midi_dev;
183
184 card->open_mode |= (file->f_mode << FMODE_MIDI_SHIFT) & (FMODE_MIDI_READ | FMODE_MIDI_WRITE);
185
186 up(&card->open_sem);
187
188 return nonseekable_open(inode, file);
189 }
190
191 static int emu10k1_midi_release(struct inode *inode, struct file *file)
192 {
193 struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data;
194 struct emu10k1_card *card;
195
196 lock_kernel();
197
198 card = midi_dev->card;
199 DPF(2, "emu10k1_midi_release()\n");
200
201 if (file->f_mode & FMODE_WRITE) {
202 if (!(file->f_flags & O_NONBLOCK)) {
203
204 while (!signal_pending(current) && (card->mpuout->firstmidiq != NULL)) {
205 DPF(4, "Cannot close - buffers not empty\n");
206
207 interruptible_sleep_on(&midi_dev->oWait);
208
209 }
210 }
211
212 emu10k1_mpuout_close(card);
213 }
214
215 if (file->f_mode & FMODE_READ) {
216 struct midi_hdr *midihdr;
217
218 if (midi_dev->mistate == MIDIIN_STATE_STARTED) {
219 emu10k1_mpuin_stop(card);
220 midi_dev->mistate = MIDIIN_STATE_STOPPED;
221 }
222
223 emu10k1_mpuin_reset(card);
224 emu10k1_mpuin_close(card);
225
226 while (!list_empty(&midi_dev->mid_hdrs)) {
227 midihdr = list_entry(midi_dev->mid_hdrs.next, struct midi_hdr, list);
228
229 list_del(midi_dev->mid_hdrs.next);
230 kfree(midihdr->data);
231 kfree(midihdr);
232 }
233 }
234
235 kfree(midi_dev);
236
237 down(&card->open_sem);
238 card->open_mode &= ~((file->f_mode << FMODE_MIDI_SHIFT) & (FMODE_MIDI_READ | FMODE_MIDI_WRITE));
239 up(&card->open_sem);
240 wake_up_interruptible(&card->open_wait);
241
242 unlock_kernel();
243
244 return 0;
245 }
246
247 static ssize_t emu10k1_midi_read(struct file *file, char __user *buffer, size_t count, loff_t * pos)
248 {
249 struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data;
250 ssize_t ret = 0;
251 u16 cnt;
252 unsigned long flags;
253
254 DPD(4, "emu10k1_midi_read(), count %#x\n", (u32) count);
255
256 if (!access_ok(VERIFY_WRITE, buffer, count))
257 return -EFAULT;
258
259 if (midi_dev->mistate == MIDIIN_STATE_STOPPED) {
260 if (emu10k1_mpuin_start(midi_dev->card) < 0) {
261 ERROR();
262 return -EINVAL;
263 }
264
265 midi_dev->mistate = MIDIIN_STATE_STARTED;
266 }
267
268 while (count > 0) {
269 cnt = MIDIIN_BUFLEN - midi_dev->ird;
270
271 spin_lock_irqsave(&midi_spinlock, flags);
272
273 if (midi_dev->icnt < cnt)
274 cnt = midi_dev->icnt;
275
276 spin_unlock_irqrestore(&midi_spinlock, flags);
277
278 if (cnt > count)
279 cnt = count;
280
281 if (cnt <= 0) {
282 if (file->f_flags & O_NONBLOCK)
283 return ret ? ret : -EAGAIN;
284 DPF(2, " Go to sleep...\n");
285
286 interruptible_sleep_on(&midi_dev->iWait);
287
288 if (signal_pending(current))
289 return ret ? ret : -ERESTARTSYS;
290
291 continue;
292 }
293
294 if (copy_to_user(buffer, midi_dev->iBuf + midi_dev->ird, cnt)) {
295 ERROR();
296 return ret ? ret : -EFAULT;
297 }
298
299 midi_dev->ird += cnt;
300 midi_dev->ird %= MIDIIN_BUFLEN;
301
302 spin_lock_irqsave(&midi_spinlock, flags);
303
304 midi_dev->icnt -= cnt;
305
306 spin_unlock_irqrestore(&midi_spinlock, flags);
307
308 count -= cnt;
309 buffer += cnt;
310 ret += cnt;
311
312 if (midi_dev->icnt == 0)
313 break;
314 }
315
316 return ret;
317 }
318
319 static ssize_t emu10k1_midi_write(struct file *file, const char __user *buffer, size_t count, loff_t * pos)
320 {
321 struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data;
322 struct midi_hdr *midihdr;
323 unsigned long flags;
324
325 DPD(4, "emu10k1_midi_write(), count=%#x\n", (u32) count);
326
327 if (!access_ok(VERIFY_READ, buffer, count))
328 return -EFAULT;
329
330 if ((midihdr = (struct midi_hdr *) kmalloc(sizeof(struct midi_hdr), GFP_KERNEL)) == NULL)
331 return -EINVAL;
332
333 midihdr->bufferlength = count;
334 midihdr->bytesrecorded = 0;
335 midihdr->flags = 0;
336
337 if ((midihdr->data = (u8 *) kmalloc(count, GFP_KERNEL)) == NULL) {
338 ERROR();
339 kfree(midihdr);
340 return -EINVAL;
341 }
342
343 if (copy_from_user(midihdr->data, buffer, count)) {
344 kfree(midihdr->data);
345 kfree(midihdr);
346 return -EFAULT;
347 }
348
349 spin_lock_irqsave(&midi_spinlock, flags);
350
351 if (emu10k1_mpuout_add_buffer(midi_dev->card, midihdr) < 0) {
352 ERROR();
353 kfree(midihdr->data);
354 kfree(midihdr);
355 spin_unlock_irqrestore(&midi_spinlock, flags);
356 return -EINVAL;
357 }
358
359 spin_unlock_irqrestore(&midi_spinlock, flags);
360
361 return count;
362 }
363
364 static unsigned int emu10k1_midi_poll(struct file *file, struct poll_table_struct *wait)
365 {
366 struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) file->private_data;
367 unsigned long flags;
368 unsigned int mask = 0;
369
370 DPF(4, "emu10k1_midi_poll() called\n");
371
372 if (file->f_mode & FMODE_WRITE)
373 poll_wait(file, &midi_dev->oWait, wait);
374
375 if (file->f_mode & FMODE_READ)
376 poll_wait(file, &midi_dev->iWait, wait);
377
378 spin_lock_irqsave(&midi_spinlock, flags);
379
380 if (file->f_mode & FMODE_WRITE)
381 mask |= POLLOUT | POLLWRNORM;
382
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;
387 }
388
389 spin_unlock_irqrestore(&midi_spinlock, flags);
390
391 return mask;
392 }
393
394 int emu10k1_midi_callback(unsigned long msg, unsigned long refdata, unsigned long *pmsg)
395 {
396 struct emu10k1_mididevice *midi_dev = (struct emu10k1_mididevice *) refdata;
397 struct midi_hdr *midihdr = NULL;
398 unsigned long flags;
399 int i;
400
401 DPF(4, "emu10k1_midi_callback()\n");
402
403 spin_lock_irqsave(&midi_spinlock, flags);
404
405 switch (msg) {
406 case ICARDMIDI_OUTLONGDATA:
407 midihdr = (struct midi_hdr *) pmsg[2];
408
409 kfree(midihdr->data);
410 kfree(midihdr);
411 wake_up_interruptible(&midi_dev->oWait);
412
413 break;
414
415 case ICARDMIDI_INLONGDATA:
416 midihdr = (struct midi_hdr *) pmsg[2];
417
418 for (i = 0; i < midihdr->bytesrecorded; i++) {
419 midi_dev->iBuf[midi_dev->iwr++] = midihdr->data[i];
420 midi_dev->iwr %= MIDIIN_BUFLEN;
421 }
422
423 midi_dev->icnt += midihdr->bytesrecorded;
424
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);
429 }
430 break;
431
432 case ICARDMIDI_INDATA:
433 {
434 u8 *pBuf = (u8 *) & pmsg[1];
435 u16 bytesvalid = pmsg[2];
436
437 for (i = 0; i < bytesvalid; i++) {
438 midi_dev->iBuf[midi_dev->iwr++] = pBuf[i];
439 midi_dev->iwr %= MIDIIN_BUFLEN;
440 }
441
442 midi_dev->icnt += bytesvalid;
443 }
444
445 wake_up_interruptible(&midi_dev->iWait);
446 break;
447
448 default: /* Unknown message */
449 spin_unlock_irqrestore(&midi_spinlock, flags);
450 return -1;
451 }
452
453 spin_unlock_irqrestore(&midi_spinlock, flags);
454
455 return 0;
456 }
457
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,
466 };
467
468
469 #ifdef EMU10K1_SEQUENCER
470
471 /* functions used for sequencer access */
472
473 int emu10k1_seq_midi_open(int dev, int mode,
474 void (*input) (int dev, unsigned char data),
475 void (*output) (int dev))
476 {
477 struct emu10k1_card *card;
478 struct midi_openinfo dsCardMidiOpenInfo;
479 struct emu10k1_mididevice *midi_dev;
480
481 if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL)
482 return -EINVAL;
483
484 card = midi_devs[dev]->devc;
485
486 if (card->open_mode) /* card is opened native */
487 return -EBUSY;
488
489 DPF(2, "emu10k1_seq_midi_open()\n");
490
491 if ((midi_dev = (struct emu10k1_mididevice *) kmalloc(sizeof(*midi_dev), GFP_KERNEL)) == NULL)
492 return -EINVAL;
493
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);
498 midi_dev->ird = 0;
499 midi_dev->iwr = 0;
500 midi_dev->icnt = 0;
501 INIT_LIST_HEAD(&midi_dev->mid_hdrs);
502
503 dsCardMidiOpenInfo.refdata = (unsigned long) midi_dev;
504
505 if (emu10k1_mpuout_open(card, &dsCardMidiOpenInfo) < 0) {
506 ERROR();
507 return -ENODEV;
508 }
509
510 card->seq_mididev = midi_dev;
511
512 return 0;
513 }
514
515 void emu10k1_seq_midi_close(int dev)
516 {
517 struct emu10k1_card *card;
518
519 DPF(2, "emu10k1_seq_midi_close()\n");
520 if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL)
521 return;
522
523 card = midi_devs[dev]->devc;
524 emu10k1_mpuout_close(card);
525
526 kfree(card->seq_mididev);
527 card->seq_mididev = NULL;
528 }
529
530 int emu10k1_seq_midi_out(int dev, unsigned char midi_byte)
531 {
532 struct emu10k1_card *card;
533 struct midi_hdr *midihdr;
534 unsigned long flags;
535
536 if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL)
537 return -EINVAL;
538
539 card = midi_devs[dev]->devc;
540
541 if ((midihdr = (struct midi_hdr *) kmalloc(sizeof(struct midi_hdr), GFP_KERNEL)) == NULL)
542 return -EINVAL;
543
544 midihdr->bufferlength = 1;
545 midihdr->bytesrecorded = 0;
546 midihdr->flags = 0;
547
548 if ((midihdr->data = (u8 *) kmalloc(1, GFP_KERNEL)) == NULL) {
549 ERROR();
550 kfree(midihdr);
551 return -EINVAL;
552 }
553
554 *(midihdr->data) = midi_byte;
555
556 spin_lock_irqsave(&midi_spinlock, flags);
557
558 if (emu10k1_mpuout_add_buffer(card, midihdr) < 0) {
559 ERROR();
560 kfree(midihdr->data);
561 kfree(midihdr);
562 spin_unlock_irqrestore(&midi_spinlock, flags);
563 return -EINVAL;
564 }
565
566 spin_unlock_irqrestore(&midi_spinlock, flags);
567
568 return 1;
569 }
570
571 int emu10k1_seq_midi_start_read(int dev)
572 {
573 return 0;
574 }
575
576 int emu10k1_seq_midi_end_read(int dev)
577 {
578 return 0;
579 }
580
581 void emu10k1_seq_midi_kick(int dev)
582 {
583 }
584
585 int emu10k1_seq_midi_buffer_status(int dev)
586 {
587 int count;
588 struct midi_queue *queue;
589 struct emu10k1_card *card;
590
591 if (midi_devs[dev] == NULL || midi_devs[dev]->devc == NULL)
592 return -EINVAL;
593
594 count = 0;
595
596 card = midi_devs[dev]->devc;
597 queue = card->mpuout->firstmidiq;
598
599 while (queue != NULL) {
600 count++;
601 if (queue == card->mpuout->lastmidiq)
602 break;
603
604 queue = queue->next;
605 }
606
607 return count;
608 }
609
610 #endif
611
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