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Merge branch 'common/pinctrl' into sh-latest
[deliverable/linux.git] / sound / core / rawmidi.c
CommitLineData
1da177e4
LT		 1/*
2 * Abstract layer for MIDI v1.0 stream
c1017a4c 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4
LT		 4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
1da177e4
LT		 22#include <sound/core.h>
23#include <linux/major.h>
24#include <linux/init.h>
1da177e4
LT		 25#include <linux/sched.h>
26#include <linux/slab.h>
27#include <linux/time.h>
28#include <linux/wait.h>
1a60d4c5 29#include <linux/mutex.h>
65a77217 30#include <linux/module.h>
1da177e4 31#include <linux/delay.h>
1da177e4
LT		 32#include <sound/rawmidi.h>
33#include <sound/info.h>
34#include <sound/control.h>
35#include <sound/minors.h>
36#include <sound/initval.h>
37
c1017a4c 38MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
1da177e4
LT		 39MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA.");
40MODULE_LICENSE("GPL");
41
42#ifdef CONFIG_SND_OSSEMUL
6581f4e7 43static int midi_map[SNDRV_CARDS];
1da177e4
LT		 44static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
45module_param_array(midi_map, int, NULL, 0444);
46MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device.");
47module_param_array(amidi_map, int, NULL, 0444);
48MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device.");
49#endif /* CONFIG_SND_OSSEMUL */
50
48c9d417
TI		 51static int snd_rawmidi_free(struct snd_rawmidi *rawmidi);
52static int snd_rawmidi_dev_free(struct snd_device *device);
53static int snd_rawmidi_dev_register(struct snd_device *device);
54static int snd_rawmidi_dev_disconnect(struct snd_device *device);
1da177e4 55
f87135f5 56static LIST_HEAD(snd_rawmidi_devices);
1a60d4c5 57static DEFINE_MUTEX(register_mutex);
1da177e4 58
f87135f5
CL		 59static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device)
60{
f87135f5
CL		 61 struct snd_rawmidi *rawmidi;
62
9244b2c3 63 list_for_each_entry(rawmidi, &snd_rawmidi_devices, list)
f87135f5
CL		 64 if (rawmidi->card == card && rawmidi->device == device)
65 return rawmidi;
f87135f5
CL		 66 return NULL;
67}
68
1da177e4
LT		 69static inline unsigned short snd_rawmidi_file_flags(struct file *file)
70{
71 switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) {
72 case FMODE_WRITE:
73 return SNDRV_RAWMIDI_LFLG_OUTPUT;
74 case FMODE_READ:
75 return SNDRV_RAWMIDI_LFLG_INPUT;
76 default:
77 return SNDRV_RAWMIDI_LFLG_OPEN;
78 }
79}
80
48c9d417 81static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream)
1da177e4 82{
48c9d417 83 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 84 return runtime->avail >= runtime->avail_min;
85}
86
48c9d417
TI		 87static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream,
88 size_t count)
1da177e4 89{
48c9d417 90 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 91 return runtime->avail >= runtime->avail_min &&
92 (!substream->append || runtime->avail >= count);
93}
94
b3c705aa 95static void snd_rawmidi_input_event_work(struct work_struct *work)
1da177e4 96{
b3c705aa
TI		 97 struct snd_rawmidi_runtime *runtime =
98 container_of(work, struct snd_rawmidi_runtime, event_work);
99 if (runtime->event)
100 runtime->event(runtime->substream);
1da177e4
LT		 101}
102
48c9d417 103static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream)
1da177e4 104{
48c9d417 105 struct snd_rawmidi_runtime *runtime;
1da177e4 106
ca2c0966 107 if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL)
1da177e4 108 return -ENOMEM;
b3c705aa 109 runtime->substream = substream;
1da177e4
LT		 110 spin_lock_init(&runtime->lock);
111 init_waitqueue_head(&runtime->sleep);
b3c705aa 112 INIT_WORK(&runtime->event_work, snd_rawmidi_input_event_work);
1da177e4
LT		 113 runtime->event = NULL;
114 runtime->buffer_size = PAGE_SIZE;
115 runtime->avail_min = 1;
116 if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
117 runtime->avail = 0;
118 else
119 runtime->avail = runtime->buffer_size;
120 if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) {
121 kfree(runtime);
122 return -ENOMEM;
123 }
124 runtime->appl_ptr = runtime->hw_ptr = 0;
125 substream->runtime = runtime;
126 return 0;
127}
128
48c9d417 129static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream)
1da177e4 130{
48c9d417 131 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 132
133 kfree(runtime->buffer);
134 kfree(runtime);
135 substream->runtime = NULL;
136 return 0;
137}
138
48c9d417 139static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up)
1da177e4 140{
219df32f
TI		 141 if (!substream->opened)
142 return;
b3c705aa 143 substream->ops->trigger(substream, up);
1da177e4
LT		 144}
145
48c9d417 146static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
1da177e4 147{
219df32f
TI		 148 if (!substream->opened)
149 return;
1da177e4 150 substream->ops->trigger(substream, up);
b3c705aa
TI		 151 if (!up)
152 cancel_work_sync(&substream->runtime->event_work);
1da177e4
LT		 153}
154
48c9d417 155int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream)
1da177e4
LT		 156{
157 unsigned long flags;
48c9d417 158 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 159
160 snd_rawmidi_output_trigger(substream, 0);
161 runtime->drain = 0;
162 spin_lock_irqsave(&runtime->lock, flags);
163 runtime->appl_ptr = runtime->hw_ptr = 0;
164 runtime->avail = runtime->buffer_size;
165 spin_unlock_irqrestore(&runtime->lock, flags);
166 return 0;
167}
168
48c9d417 169int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream)
1da177e4
LT		 170{
171 int err;
172 long timeout;
48c9d417 173 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 174
175 err = 0;
176 runtime->drain = 1;
177 timeout = wait_event_interruptible_timeout(runtime->sleep,
178 (runtime->avail >= runtime->buffer_size),
179 10*HZ);
180 if (signal_pending(current))
181 err = -ERESTARTSYS;
182 if (runtime->avail < runtime->buffer_size && !timeout) {
183 snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size);
184 err = -EIO;
185 }
186 runtime->drain = 0;
187 if (err != -ERESTARTSYS) {
188 /* we need wait a while to make sure that Tx FIFOs are empty */
189 if (substream->ops->drain)
190 substream->ops->drain(substream);
191 else
192 msleep(50);
193 snd_rawmidi_drop_output(substream);
194 }
195 return err;
196}
197
48c9d417 198int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream)
1da177e4
LT		 199{
200 unsigned long flags;
48c9d417 201 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 202
203 snd_rawmidi_input_trigger(substream, 0);
204 runtime->drain = 0;
205 spin_lock_irqsave(&runtime->lock, flags);
206 runtime->appl_ptr = runtime->hw_ptr = 0;
207 runtime->avail = 0;
208 spin_unlock_irqrestore(&runtime->lock, flags);
209 return 0;
210}
211
9a1b64ca
TI		 212/* look for an available substream for the given stream direction;
213 * if a specific subdevice is given, try to assign it
214 */
215static int assign_substream(struct snd_rawmidi *rmidi, int subdevice,
216 int stream, int mode,
217 struct snd_rawmidi_substream **sub_ret)
1da177e4 218{
9a1b64ca
TI		 219 struct snd_rawmidi_substream *substream;
220 struct snd_rawmidi_str *s = &rmidi->streams[stream];
221 static unsigned int info_flags[2] = {
222 [SNDRV_RAWMIDI_STREAM_OUTPUT] = SNDRV_RAWMIDI_INFO_OUTPUT,
223 [SNDRV_RAWMIDI_STREAM_INPUT] = SNDRV_RAWMIDI_INFO_INPUT,
224 };
1da177e4 225
9a1b64ca 226 if (!(rmidi->info_flags & info_flags[stream]))
f9d20283 227 return -ENXIO;
9a1b64ca
TI		 228 if (subdevice >= 0 && subdevice >= s->substream_count)
229 return -ENODEV;
9a1b64ca
TI		 230
231 list_for_each_entry(substream, &s->substreams, list) {
232 if (substream->opened) {
233 if (stream == SNDRV_RAWMIDI_STREAM_INPUT ||
16fb1096
CL		 234 !(mode & SNDRV_RAWMIDI_LFLG_APPEND) ||
235 !substream->append)
9a1b64ca
TI		 236 continue;
237 }
238 if (subdevice < 0 || subdevice == substream->number) {
239 *sub_ret = substream;
240 return 0;
241 }
1da177e4 242 }
9a1b64ca
TI		 243 return -EAGAIN;
244}
f9d20283 245
9a1b64ca
TI		 246/* open and do ref-counting for the given substream */
247static int open_substream(struct snd_rawmidi *rmidi,
248 struct snd_rawmidi_substream *substream,
249 int mode)
250{
251 int err;
252
8579d2d7
CL		 253 if (substream->use_count == 0) {
254 err = snd_rawmidi_runtime_create(substream);
255 if (err < 0)
256 return err;
257 err = substream->ops->open(substream);
b7fe750f
CL		 258 if (err < 0) {
259 snd_rawmidi_runtime_free(substream);
8579d2d7 260 return err;
b7fe750f 261 }
8579d2d7 262 substream->opened = 1;
2d4b8420 263 substream->active_sensing = 0;
8579d2d7
CL		 264 if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
265 substream->append = 1;
7584af10 266 substream->pid = get_pid(task_pid(current));
91d12c48 267 rmidi->streams[substream->stream].substream_opened++;
8579d2d7
CL		 268 }
269 substream->use_count++;
9a1b64ca
TI		 270 return 0;
271}
272
273static void close_substream(struct snd_rawmidi *rmidi,
274 struct snd_rawmidi_substream *substream,
275 int cleanup);
276
277static int rawmidi_open_priv(struct snd_rawmidi *rmidi, int subdevice, int mode,
278 struct snd_rawmidi_file *rfile)
279{
280 struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL;
281 int err;
282
283 rfile->input = rfile->output = NULL;
1da177e4 284 if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
9a1b64ca
TI		 285 err = assign_substream(rmidi, subdevice,
286 SNDRV_RAWMIDI_STREAM_INPUT,
287 mode, &sinput);
288 if (err < 0)
b7fe750f 289 return err;
1da177e4
LT		 290 }
291 if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
9a1b64ca
TI		 292 err = assign_substream(rmidi, subdevice,
293 SNDRV_RAWMIDI_STREAM_OUTPUT,
294 mode, &soutput);
295 if (err < 0)
b7fe750f 296 return err;
1da177e4 297 }
9a1b64ca
TI		 298
299 if (sinput) {
300 err = open_substream(rmidi, sinput, mode);
301 if (err < 0)
b7fe750f 302 return err;
1da177e4 303 }
9a1b64ca
TI		 304 if (soutput) {
305 err = open_substream(rmidi, soutput, mode);
306 if (err < 0) {
307 if (sinput)
308 close_substream(rmidi, sinput, 0);
b7fe750f 309 return err;
1da177e4 310 }
1da177e4 311 }
9a1b64ca
TI		 312
313 rfile->rmidi = rmidi;
314 rfile->input = sinput;
315 rfile->output = soutput;
1da177e4 316 return 0;
9a1b64ca
TI		 317}
318
319/* called from sound/core/seq/seq_midi.c */
320int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
321 int mode, struct snd_rawmidi_file * rfile)
322{
323 struct snd_rawmidi *rmidi;
324 int err;
325
326 if (snd_BUG_ON(!rfile))
327 return -EINVAL;
328
329 mutex_lock(&register_mutex);
330 rmidi = snd_rawmidi_search(card, device);
331 if (rmidi == NULL) {
332 mutex_unlock(&register_mutex);
333 return -ENODEV;
334 }
335 if (!try_module_get(rmidi->card->module)) {
336 mutex_unlock(&register_mutex);
337 return -ENXIO;
338 }
339 mutex_unlock(&register_mutex);
340
341 mutex_lock(&rmidi->open_mutex);
342 err = rawmidi_open_priv(rmidi, subdevice, mode, rfile);
343 mutex_unlock(&rmidi->open_mutex);
344 if (err < 0)
345 module_put(rmidi->card->module);
1da177e4
LT		 346 return err;
347}
348
349static int snd_rawmidi_open(struct inode *inode, struct file *file)
350{
351 int maj = imajor(inode);
48c9d417 352 struct snd_card *card;
f87135f5 353 int subdevice;
1da177e4
LT		 354 unsigned short fflags;
355 int err;
48c9d417 356 struct snd_rawmidi *rmidi;
9a1b64ca 357 struct snd_rawmidi_file *rawmidi_file = NULL;
1da177e4 358 wait_queue_t wait;
48c9d417 359 struct snd_ctl_file *kctl;
1da177e4 360
9a1b64ca
TI		 361 if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK))
362 return -EINVAL; /* invalid combination */
363
02f4865f
TI		 364 err = nonseekable_open(inode, file);
365 if (err < 0)
366 return err;
367
f1902860 368 if (maj == snd_major) {
f87135f5
CL		 369 rmidi = snd_lookup_minor_data(iminor(inode),
370 SNDRV_DEVICE_TYPE_RAWMIDI);
1da177e4 371#ifdef CONFIG_SND_OSSEMUL
f1902860 372 } else if (maj == SOUND_MAJOR) {
f87135f5
CL		 373 rmidi = snd_lookup_oss_minor_data(iminor(inode),
374 SNDRV_OSS_DEVICE_TYPE_MIDI);
1da177e4 375#endif
f1902860 376 } else
1da177e4 377 return -ENXIO;
1da177e4 378
1da177e4
LT		 379 if (rmidi == NULL)
380 return -ENODEV;
9a1b64ca
TI		 381
382 if (!try_module_get(rmidi->card->module))
383 return -ENXIO;
384
385 mutex_lock(&rmidi->open_mutex);
1da177e4
LT		 386 card = rmidi->card;
387 err = snd_card_file_add(card, file);
388 if (err < 0)
9a1b64ca 389 goto __error_card;
1da177e4 390 fflags = snd_rawmidi_file_flags(file);
f1902860 391 if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */
1da177e4 392 fflags |= SNDRV_RAWMIDI_LFLG_APPEND;
1da177e4
LT		 393 rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL);
394 if (rawmidi_file == NULL) {
9a1b64ca
TI		 395 err = -ENOMEM;
396 goto __error;
1da177e4
LT		 397 }
398 init_waitqueue_entry(&wait, current);
399 add_wait_queue(&rmidi->open_wait, &wait);
1da177e4
LT		 400 while (1) {
401 subdevice = -1;
399ccdc1 402 read_lock(&card->ctl_files_rwlock);
9244b2c3 403 list_for_each_entry(kctl, &card->ctl_files, list) {
25d27ede 404 if (kctl->pid == task_pid(current)) {
1da177e4 405 subdevice = kctl->prefer_rawmidi_subdevice;
2529bba7
TI		 406 if (subdevice != -1)
407 break;
1da177e4
LT		 408 }
409 }
399ccdc1 410 read_unlock(&card->ctl_files_rwlock);
9a1b64ca 411 err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file);
1da177e4
LT		 412 if (err >= 0)
413 break;
414 if (err == -EAGAIN) {
415 if (file->f_flags & O_NONBLOCK) {
416 err = -EBUSY;
417 break;
418 }
419 } else
420 break;
421 set_current_state(TASK_INTERRUPTIBLE);
1a60d4c5 422 mutex_unlock(&rmidi->open_mutex);
1da177e4 423 schedule();
1a60d4c5 424 mutex_lock(&rmidi->open_mutex);
1da177e4
LT		 425 if (signal_pending(current)) {
426 err = -ERESTARTSYS;
427 break;
428 }
429 }
9a1b64ca
TI		 430 remove_wait_queue(&rmidi->open_wait, &wait);
431 if (err < 0) {
432 kfree(rawmidi_file);
433 goto __error;
434 }
1da177e4
LT		 435#ifdef CONFIG_SND_OSSEMUL
436 if (rawmidi_file->input && rawmidi_file->input->runtime)
437 rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR);
438 if (rawmidi_file->output && rawmidi_file->output->runtime)
439 rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR);
440#endif
9a1b64ca
TI		 441 file->private_data = rawmidi_file;
442 mutex_unlock(&rmidi->open_mutex);
443 return 0;
444
445 __error:
446 snd_card_file_remove(card, file);
447 __error_card:
1a60d4c5 448 mutex_unlock(&rmidi->open_mutex);
9a1b64ca 449 module_put(rmidi->card->module);
1da177e4
LT		 450 return err;
451}
452
9a1b64ca
TI		 453static void close_substream(struct snd_rawmidi *rmidi,
454 struct snd_rawmidi_substream *substream,
455 int cleanup)
1da177e4 456{
9a1b64ca
TI		 457 if (--substream->use_count)
458 return;
1da177e4 459
9a1b64ca
TI		 460 if (cleanup) {
461 if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
462 snd_rawmidi_input_trigger(substream, 0);
463 else {
1da177e4
LT		 464 if (substream->active_sensing) {
465 unsigned char buf = 0xfe;
9a1b64ca
TI		 466 /* sending single active sensing message
467 * to shut the device up
468 */
1da177e4
LT		 469 snd_rawmidi_kernel_write(substream, &buf, 1);
470 }
471 if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS)
472 snd_rawmidi_output_trigger(substream, 0);
1da177e4 473 }
1da177e4 474 }
9a1b64ca
TI		 475 substream->ops->close(substream);
476 if (substream->runtime->private_free)
477 substream->runtime->private_free(substream);
478 snd_rawmidi_runtime_free(substream);
479 substream->opened = 0;
480 substream->append = 0;
7584af10
CL		 481 put_pid(substream->pid);
482 substream->pid = NULL;
91d12c48 483 rmidi->streams[substream->stream].substream_opened--;
9a1b64ca
TI		 484}
485
486static void rawmidi_release_priv(struct snd_rawmidi_file *rfile)
487{
488 struct snd_rawmidi *rmidi;
489
490 rmidi = rfile->rmidi;
491 mutex_lock(&rmidi->open_mutex);
492 if (rfile->input) {
493 close_substream(rmidi, rfile->input, 1);
494 rfile->input = NULL;
495 }
496 if (rfile->output) {
497 close_substream(rmidi, rfile->output, 1);
498 rfile->output = NULL;
499 }
500 rfile->rmidi = NULL;
1a60d4c5 501 mutex_unlock(&rmidi->open_mutex);
9a1b64ca
TI		 502 wake_up(&rmidi->open_wait);
503}
504
505/* called from sound/core/seq/seq_midi.c */
506int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile)
507{
508 struct snd_rawmidi *rmidi;
509
510 if (snd_BUG_ON(!rfile))
511 return -ENXIO;
512
513 rmidi = rfile->rmidi;
514 rawmidi_release_priv(rfile);
1da177e4
LT		 515 module_put(rmidi->card->module);
516 return 0;
517}
518
519static int snd_rawmidi_release(struct inode *inode, struct file *file)
520{
48c9d417
TI		 521 struct snd_rawmidi_file *rfile;
522 struct snd_rawmidi *rmidi;
aa73aec6 523 struct module *module;
1da177e4
LT		 524
525 rfile = file->private_data;
1da177e4 526 rmidi = rfile->rmidi;
9a1b64ca 527 rawmidi_release_priv(rfile);
1da177e4 528 kfree(rfile);
aa73aec6 529 module = rmidi->card->module;
1da177e4 530 snd_card_file_remove(rmidi->card, file);
aa73aec6 531 module_put(module);
9a1b64ca 532 return 0;
1da177e4
LT		 533}
534
18612048
AB		 535static int snd_rawmidi_info(struct snd_rawmidi_substream *substream,
536 struct snd_rawmidi_info *info)
1da177e4 537{
48c9d417 538 struct snd_rawmidi *rmidi;
1da177e4
LT		 539
540 if (substream == NULL)
541 return -ENODEV;
542 rmidi = substream->rmidi;
543 memset(info, 0, sizeof(*info));
544 info->card = rmidi->card->number;
545 info->device = rmidi->device;
546 info->subdevice = substream->number;
547 info->stream = substream->stream;
548 info->flags = rmidi->info_flags;
549 strcpy(info->id, rmidi->id);
550 strcpy(info->name, rmidi->name);
551 strcpy(info->subname, substream->name);
552 info->subdevices_count = substream->pstr->substream_count;
553 info->subdevices_avail = (substream->pstr->substream_count -
554 substream->pstr->substream_opened);
555 return 0;
556}
557
48c9d417
TI		 558static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream,
559 struct snd_rawmidi_info __user * _info)
1da177e4 560{
48c9d417 561 struct snd_rawmidi_info info;
1da177e4
LT		 562 int err;
563 if ((err = snd_rawmidi_info(substream, &info)) < 0)
564 return err;
48c9d417 565 if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
1da177e4
LT		 566 return -EFAULT;
567 return 0;
568}
569
48c9d417 570int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info)
1da177e4 571{
48c9d417
TI		 572 struct snd_rawmidi *rmidi;
573 struct snd_rawmidi_str *pstr;
574 struct snd_rawmidi_substream *substream;
f87135f5 575
1a60d4c5 576 mutex_lock(&register_mutex);
f87135f5 577 rmidi = snd_rawmidi_search(card, info->device);
1a60d4c5 578 mutex_unlock(&register_mutex);
a106cd3d
CL		 579 if (!rmidi)
580 return -ENXIO;
1da177e4
LT		 581 if (info->stream < 0 || info->stream > 1)
582 return -EINVAL;
583 pstr = &rmidi->streams[info->stream];
584 if (pstr->substream_count == 0)
585 return -ENOENT;
586 if (info->subdevice >= pstr->substream_count)
587 return -ENXIO;
9244b2c3 588 list_for_each_entry(substream, &pstr->substreams, list) {
1da177e4
LT		 589 if ((unsigned int)substream->number == info->subdevice)
590 return snd_rawmidi_info(substream, info);
591 }
592 return -ENXIO;
593}
594
48c9d417
TI		 595static int snd_rawmidi_info_select_user(struct snd_card *card,
596 struct snd_rawmidi_info __user *_info)
1da177e4
LT		 597{
598 int err;
48c9d417 599 struct snd_rawmidi_info info;
1da177e4
LT		 600 if (get_user(info.device, &_info->device))
601 return -EFAULT;
602 if (get_user(info.stream, &_info->stream))
603 return -EFAULT;
604 if (get_user(info.subdevice, &_info->subdevice))
605 return -EFAULT;
606 if ((err = snd_rawmidi_info_select(card, &info)) < 0)
607 return err;
48c9d417 608 if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
1da177e4
LT		 609 return -EFAULT;
610 return 0;
611}
612
48c9d417
TI		 613int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
614 struct snd_rawmidi_params * params)
1da177e4
LT		 615{
616 char *newbuf;
48c9d417 617 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 618
619 if (substream->append && substream->use_count > 1)
620 return -EBUSY;
621 snd_rawmidi_drain_output(substream);
622 if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
623 return -EINVAL;
624 }
625 if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
626 return -EINVAL;
627 }
628 if (params->buffer_size != runtime->buffer_size) {
3101ba03
TI		 629 newbuf = krealloc(runtime->buffer, params->buffer_size,
630 GFP_KERNEL);
4fa95ef6 631 if (!newbuf)
1da177e4 632 return -ENOMEM;
1da177e4
LT		 633 runtime->buffer = newbuf;
634 runtime->buffer_size = params->buffer_size;
1b98ea47 635 runtime->avail = runtime->buffer_size;
1da177e4
LT		 636 }
637 runtime->avail_min = params->avail_min;
638 substream->active_sensing = !params->no_active_sensing;
639 return 0;
640}
641
48c9d417
TI		 642int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
643 struct snd_rawmidi_params * params)
1da177e4
LT		 644{
645 char *newbuf;
48c9d417 646 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 647
648 snd_rawmidi_drain_input(substream);
649 if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
650 return -EINVAL;
651 }
652 if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
653 return -EINVAL;
654 }
655 if (params->buffer_size != runtime->buffer_size) {
3101ba03
TI		 656 newbuf = krealloc(runtime->buffer, params->buffer_size,
657 GFP_KERNEL);
4fa95ef6 658 if (!newbuf)
1da177e4 659 return -ENOMEM;
1da177e4
LT		 660 runtime->buffer = newbuf;
661 runtime->buffer_size = params->buffer_size;
662 }
663 runtime->avail_min = params->avail_min;
664 return 0;
665}
666
48c9d417
TI		 667static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream,
668 struct snd_rawmidi_status * status)
1da177e4 669{
48c9d417 670 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 671
672 memset(status, 0, sizeof(*status));
673 status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT;
674 spin_lock_irq(&runtime->lock);
675 status->avail = runtime->avail;
676 spin_unlock_irq(&runtime->lock);
677 return 0;
678}
679
48c9d417
TI		 680static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream,
681 struct snd_rawmidi_status * status)
1da177e4 682{
48c9d417 683 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 684
685 memset(status, 0, sizeof(*status));
686 status->stream = SNDRV_RAWMIDI_STREAM_INPUT;
687 spin_lock_irq(&runtime->lock);
688 status->avail = runtime->avail;
689 status->xruns = runtime->xruns;
690 runtime->xruns = 0;
691 spin_unlock_irq(&runtime->lock);
692 return 0;
693}
694
695static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
696{
48c9d417 697 struct snd_rawmidi_file *rfile;
1da177e4
LT		 698 void __user *argp = (void __user *)arg;
699
700 rfile = file->private_data;
701 if (((cmd >> 8) & 0xff) != 'W')
702 return -ENOTTY;
703 switch (cmd) {
704 case SNDRV_RAWMIDI_IOCTL_PVERSION:
705 return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0;
706 case SNDRV_RAWMIDI_IOCTL_INFO:
707 {
48c9d417
TI		 708 int stream;
709 struct snd_rawmidi_info __user *info = argp;
1da177e4
LT		 710 if (get_user(stream, &info->stream))
711 return -EFAULT;
712 switch (stream) {
713 case SNDRV_RAWMIDI_STREAM_INPUT:
714 return snd_rawmidi_info_user(rfile->input, info);
715 case SNDRV_RAWMIDI_STREAM_OUTPUT:
716 return snd_rawmidi_info_user(rfile->output, info);
717 default:
718 return -EINVAL;
719 }
720 }
721 case SNDRV_RAWMIDI_IOCTL_PARAMS:
722 {
48c9d417
TI		 723 struct snd_rawmidi_params params;
724 if (copy_from_user(&params, argp, sizeof(struct snd_rawmidi_params)))
1da177e4
LT		 725 return -EFAULT;
726 switch (params.stream) {
727 case SNDRV_RAWMIDI_STREAM_OUTPUT:
728 if (rfile->output == NULL)
729 return -EINVAL;
730 return snd_rawmidi_output_params(rfile->output, &params);
731 case SNDRV_RAWMIDI_STREAM_INPUT:
732 if (rfile->input == NULL)
733 return -EINVAL;
734 return snd_rawmidi_input_params(rfile->input, &params);
735 default:
736 return -EINVAL;
737 }
738 }
739 case SNDRV_RAWMIDI_IOCTL_STATUS:
740 {
741 int err = 0;
48c9d417
TI		 742 struct snd_rawmidi_status status;
743 if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status)))
1da177e4
LT		 744 return -EFAULT;
745 switch (status.stream) {
746 case SNDRV_RAWMIDI_STREAM_OUTPUT:
747 if (rfile->output == NULL)
748 return -EINVAL;
749 err = snd_rawmidi_output_status(rfile->output, &status);
750 break;
751 case SNDRV_RAWMIDI_STREAM_INPUT:
752 if (rfile->input == NULL)
753 return -EINVAL;
754 err = snd_rawmidi_input_status(rfile->input, &status);
755 break;
756 default:
757 return -EINVAL;
758 }
759 if (err < 0)
760 return err;
48c9d417 761 if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status)))
1da177e4
LT		 762 return -EFAULT;
763 return 0;
764 }
765 case SNDRV_RAWMIDI_IOCTL_DROP:
766 {
767 int val;
768 if (get_user(val, (int __user *) argp))
769 return -EFAULT;
770 switch (val) {
771 case SNDRV_RAWMIDI_STREAM_OUTPUT:
772 if (rfile->output == NULL)
773 return -EINVAL;
774 return snd_rawmidi_drop_output(rfile->output);
775 default:
776 return -EINVAL;
777 }
778 }
779 case SNDRV_RAWMIDI_IOCTL_DRAIN:
780 {
781 int val;
782 if (get_user(val, (int __user *) argp))
783 return -EFAULT;
784 switch (val) {
785 case SNDRV_RAWMIDI_STREAM_OUTPUT:
786 if (rfile->output == NULL)
787 return -EINVAL;
788 return snd_rawmidi_drain_output(rfile->output);
789 case SNDRV_RAWMIDI_STREAM_INPUT:
790 if (rfile->input == NULL)
791 return -EINVAL;
792 return snd_rawmidi_drain_input(rfile->input);
793 default:
794 return -EINVAL;
795 }
796 }
797#ifdef CONFIG_SND_DEBUG
798 default:
799 snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd);
800#endif
801 }
802 return -ENOTTY;
803}
804
48c9d417
TI		 805static int snd_rawmidi_control_ioctl(struct snd_card *card,
806 struct snd_ctl_file *control,
1da177e4
LT		 807 unsigned int cmd,
808 unsigned long arg)
809{
810 void __user *argp = (void __user *)arg;
1da177e4 811
1da177e4
LT		 812 switch (cmd) {
813 case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE:
814 {
815 int device;
816
817 if (get_user(device, (int __user *)argp))
818 return -EFAULT;
a7a13d06
DC		 819 if (device >= SNDRV_RAWMIDI_DEVICES) /* next device is -1 */
820 device = SNDRV_RAWMIDI_DEVICES - 1;
1a60d4c5 821 mutex_lock(&register_mutex);
1da177e4
LT		 822 device = device < 0 ? 0 : device + 1;
823 while (device < SNDRV_RAWMIDI_DEVICES) {
f87135f5 824 if (snd_rawmidi_search(card, device))
1da177e4
LT		 825 break;
826 device++;
827 }
828 if (device == SNDRV_RAWMIDI_DEVICES)
829 device = -1;
1a60d4c5 830 mutex_unlock(&register_mutex);
1da177e4
LT		 831 if (put_user(device, (int __user *)argp))
832 return -EFAULT;
833 return 0;
834 }
835 case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE:
836 {
837 int val;
838
839 if (get_user(val, (int __user *)argp))
840 return -EFAULT;
841 control->prefer_rawmidi_subdevice = val;
842 return 0;
843 }
844 case SNDRV_CTL_IOCTL_RAWMIDI_INFO:
845 return snd_rawmidi_info_select_user(card, argp);
846 }
847 return -ENOIOCTLCMD;
848}
849
850/**
851 * snd_rawmidi_receive - receive the input data from the device
852 * @substream: the rawmidi substream
853 * @buffer: the buffer pointer
854 * @count: the data size to read
855 *
856 * Reads the data from the internal buffer.
857 *
858 * Returns the size of read data, or a negative error code on failure.
859 */
48c9d417
TI		 860int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
861 const unsigned char *buffer, int count)
1da177e4
LT		 862{
863 unsigned long flags;
864 int result = 0, count1;
48c9d417 865 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4 866
219df32f
TI		 867 if (!substream->opened)
868 return -EBADFD;
1da177e4
LT		 869 if (runtime->buffer == NULL) {
870 snd_printd("snd_rawmidi_receive: input is not active!!!\n");
871 return -EINVAL;
872 }
873 spin_lock_irqsave(&runtime->lock, flags);
874 if (count == 1) { /* special case, faster code */
875 substream->bytes++;
876 if (runtime->avail < runtime->buffer_size) {
877 runtime->buffer[runtime->hw_ptr++] = buffer[0];
878 runtime->hw_ptr %= runtime->buffer_size;
879 runtime->avail++;
880 result++;
881 } else {
882 runtime->xruns++;
883 }
884 } else {
885 substream->bytes += count;
886 count1 = runtime->buffer_size - runtime->hw_ptr;
887 if (count1 > count)
888 count1 = count;
889 if (count1 > (int)(runtime->buffer_size - runtime->avail))
890 count1 = runtime->buffer_size - runtime->avail;
891 memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1);
892 runtime->hw_ptr += count1;
893 runtime->hw_ptr %= runtime->buffer_size;
894 runtime->avail += count1;
895 count -= count1;
896 result += count1;
897 if (count > 0) {
898 buffer += count1;
899 count1 = count;
900 if (count1 > (int)(runtime->buffer_size - runtime->avail)) {
901 count1 = runtime->buffer_size - runtime->avail;
902 runtime->xruns += count - count1;
903 }
904 if (count1 > 0) {
905 memcpy(runtime->buffer, buffer, count1);
906 runtime->hw_ptr = count1;
907 runtime->avail += count1;
908 result += count1;
909 }
910 }
911 }
912 if (result > 0) {
913 if (runtime->event)
b3c705aa 914 schedule_work(&runtime->event_work);
1da177e4
LT		 915 else if (snd_rawmidi_ready(substream))
916 wake_up(&runtime->sleep);
917 }
918 spin_unlock_irqrestore(&runtime->lock, flags);
919 return result;
920}
921
48c9d417 922static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream,
17596a80
MŚ		 923 unsigned char __user *userbuf,
924 unsigned char *kernelbuf, long count)
1da177e4
LT		 925{
926 unsigned long flags;
927 long result = 0, count1;
48c9d417 928 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 929
930 while (count > 0 && runtime->avail) {
931 count1 = runtime->buffer_size - runtime->appl_ptr;
932 if (count1 > count)
933 count1 = count;
934 spin_lock_irqsave(&runtime->lock, flags);
935 if (count1 > (int)runtime->avail)
936 count1 = runtime->avail;
17596a80
MŚ		 937 if (kernelbuf)
938 memcpy(kernelbuf + result, runtime->buffer + runtime->appl_ptr, count1);
939 if (userbuf) {
1da177e4 940 spin_unlock_irqrestore(&runtime->lock, flags);
17596a80 941 if (copy_to_user(userbuf + result,
1da177e4
LT		 942 runtime->buffer + runtime->appl_ptr, count1)) {
943 return result > 0 ? result : -EFAULT;
944 }
945 spin_lock_irqsave(&runtime->lock, flags);
946 }
947 runtime->appl_ptr += count1;
948 runtime->appl_ptr %= runtime->buffer_size;
949 runtime->avail -= count1;
950 spin_unlock_irqrestore(&runtime->lock, flags);
951 result += count1;
952 count -= count1;
953 }
954 return result;
955}
956
48c9d417
TI		 957long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
958 unsigned char *buf, long count)
1da177e4
LT		 959{
960 snd_rawmidi_input_trigger(substream, 1);
17596a80 961 return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count);
1da177e4
LT		 962}
963
48c9d417
TI		 964static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count,
965 loff_t *offset)
1da177e4
LT		 966{
967 long result;
968 int count1;
48c9d417
TI		 969 struct snd_rawmidi_file *rfile;
970 struct snd_rawmidi_substream *substream;
971 struct snd_rawmidi_runtime *runtime;
1da177e4
LT		 972
973 rfile = file->private_data;
974 substream = rfile->input;
975 if (substream == NULL)
976 return -EIO;
977 runtime = substream->runtime;
978 snd_rawmidi_input_trigger(substream, 1);
979 result = 0;
980 while (count > 0) {
981 spin_lock_irq(&runtime->lock);
982 while (!snd_rawmidi_ready(substream)) {
983 wait_queue_t wait;
984 if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
985 spin_unlock_irq(&runtime->lock);
986 return result > 0 ? result : -EAGAIN;
987 }
988 init_waitqueue_entry(&wait, current);
989 add_wait_queue(&runtime->sleep, &wait);
990 set_current_state(TASK_INTERRUPTIBLE);
991 spin_unlock_irq(&runtime->lock);
992 schedule();
993 remove_wait_queue(&runtime->sleep, &wait);
994 if (signal_pending(current))
995 return result > 0 ? result : -ERESTARTSYS;
996 if (!runtime->avail)
997 return result > 0 ? result : -EIO;
998 spin_lock_irq(&runtime->lock);
999 }
1000 spin_unlock_irq(&runtime->lock);
4d23359b 1001 count1 = snd_rawmidi_kernel_read1(substream,
17596a80
MŚ		 1002 (unsigned char __user *)buf,
1003 NULL/*kernelbuf*/,
1004 count);
1da177e4
LT		 1005 if (count1 < 0)
1006 return result > 0 ? result : count1;
1007 result += count1;
1008 buf += count1;
1009 count -= count1;
1010 }
1011 return result;
1012}
1013
1014/**
1015 * snd_rawmidi_transmit_empty - check whether the output buffer is empty
1016 * @substream: the rawmidi substream
1017 *
1018 * Returns 1 if the internal output buffer is empty, 0 if not.
1019 */
48c9d417 1020int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
1da177e4 1021{
48c9d417 1022 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 1023 int result;
1024 unsigned long flags;
1025
1026 if (runtime->buffer == NULL) {
1027 snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n");
1028 return 1;
1029 }
1030 spin_lock_irqsave(&runtime->lock, flags);
1031 result = runtime->avail >= runtime->buffer_size;
1032 spin_unlock_irqrestore(&runtime->lock, flags);
1033 return result;
1034}
1035
1036/**
1037 * snd_rawmidi_transmit_peek - copy data from the internal buffer
1038 * @substream: the rawmidi substream
1039 * @buffer: the buffer pointer
1040 * @count: data size to transfer
1041 *
1042 * Copies data from the internal output buffer to the given buffer.
1043 *
1044 * Call this in the interrupt handler when the midi output is ready,
1045 * and call snd_rawmidi_transmit_ack() after the transmission is
1046 * finished.
1047 *
1048 * Returns the size of copied data, or a negative error code on failure.
1049 */
48c9d417
TI		 1050int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
1051 unsigned char *buffer, int count)
1da177e4
LT		 1052{
1053 unsigned long flags;
1054 int result, count1;
48c9d417 1055 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 1056
1057 if (runtime->buffer == NULL) {
1058 snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n");
1059 return -EINVAL;
1060 }
1061 result = 0;
1062 spin_lock_irqsave(&runtime->lock, flags);
1063 if (runtime->avail >= runtime->buffer_size) {
1064 /* warning: lowlevel layer MUST trigger down the hardware */
1065 goto __skip;
1066 }
1067 if (count == 1) { /* special case, faster code */
1068 *buffer = runtime->buffer[runtime->hw_ptr];
1069 result++;
1070 } else {
1071 count1 = runtime->buffer_size - runtime->hw_ptr;
1072 if (count1 > count)
1073 count1 = count;
1074 if (count1 > (int)(runtime->buffer_size - runtime->avail))
1075 count1 = runtime->buffer_size - runtime->avail;
1076 memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1);
1077 count -= count1;
1078 result += count1;
1079 if (count > 0) {
1080 if (count > (int)(runtime->buffer_size - runtime->avail - count1))
1081 count = runtime->buffer_size - runtime->avail - count1;
1082 memcpy(buffer + count1, runtime->buffer, count);
1083 result += count;
1084 }
1085 }
1086 __skip:
1087 spin_unlock_irqrestore(&runtime->lock, flags);
1088 return result;
1089}
1090
1091/**
1092 * snd_rawmidi_transmit_ack - acknowledge the transmission
1093 * @substream: the rawmidi substream
1094 * @count: the tranferred count
1095 *
1096 * Advances the hardware pointer for the internal output buffer with
1097 * the given size and updates the condition.
1098 * Call after the transmission is finished.
1099 *
1100 * Returns the advanced size if successful, or a negative error code on failure.
1101 */
48c9d417 1102int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
1da177e4
LT		 1103{
1104 unsigned long flags;
48c9d417 1105 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4
LT		 1106
1107 if (runtime->buffer == NULL) {
1108 snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n");
1109 return -EINVAL;
1110 }
1111 spin_lock_irqsave(&runtime->lock, flags);
7eaa943c 1112 snd_BUG_ON(runtime->avail + count > runtime->buffer_size);
1da177e4
LT		 1113 runtime->hw_ptr += count;
1114 runtime->hw_ptr %= runtime->buffer_size;
1115 runtime->avail += count;
1116 substream->bytes += count;
1117 if (count > 0) {
1118 if (runtime->drain || snd_rawmidi_ready(substream))
1119 wake_up(&runtime->sleep);
1120 }
1121 spin_unlock_irqrestore(&runtime->lock, flags);
1122 return count;
1123}
1124
1125/**
1126 * snd_rawmidi_transmit - copy from the buffer to the device
1127 * @substream: the rawmidi substream
df8db936 1128 * @buffer: the buffer pointer
1da177e4
LT		 1129 * @count: the data size to transfer
1130 *
1131 * Copies data from the buffer to the device and advances the pointer.
1132 *
1133 * Returns the copied size if successful, or a negative error code on failure.
1134 */
48c9d417
TI		 1135int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
1136 unsigned char *buffer, int count)
1da177e4 1137{
219df32f
TI		 1138 if (!substream->opened)
1139 return -EBADFD;
1da177e4
LT		 1140 count = snd_rawmidi_transmit_peek(substream, buffer, count);
1141 if (count < 0)
1142 return count;
1143 return snd_rawmidi_transmit_ack(substream, count);
1144}
1145
48c9d417 1146static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
17596a80
MŚ		 1147 const unsigned char __user *userbuf,
1148 const unsigned char *kernelbuf,
1149 long count)
1da177e4
LT		 1150{
1151 unsigned long flags;
1152 long count1, result;
48c9d417 1153 struct snd_rawmidi_runtime *runtime = substream->runtime;
1da177e4 1154
7eaa943c
TI		 1155 if (snd_BUG_ON(!kernelbuf && !userbuf))
1156 return -EINVAL;
1157 if (snd_BUG_ON(!runtime->buffer))
1158 return -EINVAL;
1da177e4
LT		 1159
1160 result = 0;
1161 spin_lock_irqsave(&runtime->lock, flags);
1162 if (substream->append) {
1163 if ((long)runtime->avail < count) {
1164 spin_unlock_irqrestore(&runtime->lock, flags);
1165 return -EAGAIN;
1166 }
1167 }
1168 while (count > 0 && runtime->avail > 0) {
1169 count1 = runtime->buffer_size - runtime->appl_ptr;
1170 if (count1 > count)
1171 count1 = count;
1172 if (count1 > (long)runtime->avail)
1173 count1 = runtime->avail;
17596a80
MŚ		 1174 if (kernelbuf)
1175 memcpy(runtime->buffer + runtime->appl_ptr,
1176 kernelbuf + result, count1);
1177 else if (userbuf) {
1da177e4
LT		 1178 spin_unlock_irqrestore(&runtime->lock, flags);
1179 if (copy_from_user(runtime->buffer + runtime->appl_ptr,
17596a80 1180 userbuf + result, count1)) {
1da177e4
LT		 1181 spin_lock_irqsave(&runtime->lock, flags);
1182 result = result > 0 ? result : -EFAULT;
1183 goto __end;
1184 }
1185 spin_lock_irqsave(&runtime->lock, flags);
1186 }
1187 runtime->appl_ptr += count1;
1188 runtime->appl_ptr %= runtime->buffer_size;
1189 runtime->avail -= count1;
1190 result += count1;
1da177e4
LT		 1191 count -= count1;
1192 }
1193 __end:
1194 count1 = runtime->avail < runtime->buffer_size;
1195 spin_unlock_irqrestore(&runtime->lock, flags);
1196 if (count1)
1197 snd_rawmidi_output_trigger(substream, 1);
1198 return result;
1199}
1200
48c9d417
TI		 1201long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
1202 const unsigned char *buf, long count)
1da177e4 1203{
17596a80 1204 return snd_rawmidi_kernel_write1(substream, NULL, buf, count);
1da177e4
LT		 1205}
1206
48c9d417
TI		 1207static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf,
1208 size_t count, loff_t *offset)
1da177e4
LT		 1209{
1210 long result, timeout;
1211 int count1;
48c9d417
TI		 1212 struct snd_rawmidi_file *rfile;
1213 struct snd_rawmidi_runtime *runtime;
1214 struct snd_rawmidi_substream *substream;
1da177e4
LT		 1215
1216 rfile = file->private_data;
1217 substream = rfile->output;
1218 runtime = substream->runtime;
1219 /* we cannot put an atomic message to our buffer */
1220 if (substream->append && count > runtime->buffer_size)
1221 return -EIO;
1222 result = 0;
1223 while (count > 0) {
1224 spin_lock_irq(&runtime->lock);
1225 while (!snd_rawmidi_ready_append(substream, count)) {
1226 wait_queue_t wait;
1227 if (file->f_flags & O_NONBLOCK) {
1228 spin_unlock_irq(&runtime->lock);
1229 return result > 0 ? result : -EAGAIN;
1230 }
1231 init_waitqueue_entry(&wait, current);
1232 add_wait_queue(&runtime->sleep, &wait);
1233 set_current_state(TASK_INTERRUPTIBLE);
1234 spin_unlock_irq(&runtime->lock);
1235 timeout = schedule_timeout(30 * HZ);
1236 remove_wait_queue(&runtime->sleep, &wait);
1237 if (signal_pending(current))
1238 return result > 0 ? result : -ERESTARTSYS;
1239 if (!runtime->avail && !timeout)
1240 return result > 0 ? result : -EIO;
1241 spin_lock_irq(&runtime->lock);
1242 }
1243 spin_unlock_irq(&runtime->lock);
17596a80 1244 count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count);
1da177e4
LT		 1245 if (count1 < 0)
1246 return result > 0 ? result : count1;
1247 result += count1;
1248 buf += count1;
1249 if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK))
1250 break;
1251 count -= count1;
1252 }
6b2f3d1f 1253 if (file->f_flags & O_DSYNC) {
1da177e4
LT		 1254 spin_lock_irq(&runtime->lock);
1255 while (runtime->avail != runtime->buffer_size) {
1256 wait_queue_t wait;
1257 unsigned int last_avail = runtime->avail;
1258 init_waitqueue_entry(&wait, current);
1259 add_wait_queue(&runtime->sleep, &wait);
1260 set_current_state(TASK_INTERRUPTIBLE);
1261 spin_unlock_irq(&runtime->lock);
1262 timeout = schedule_timeout(30 * HZ);
1263 remove_wait_queue(&runtime->sleep, &wait);
1264 if (signal_pending(current))
1265 return result > 0 ? result : -ERESTARTSYS;
1266 if (runtime->avail == last_avail && !timeout)
1267 return result > 0 ? result : -EIO;
1268 spin_lock_irq(&runtime->lock);
1269 }
1270 spin_unlock_irq(&runtime->lock);
1271 }
1272 return result;
1273}
1274
1275static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait)
1276{
48c9d417
TI		 1277 struct snd_rawmidi_file *rfile;
1278 struct snd_rawmidi_runtime *runtime;
1da177e4
LT		 1279 unsigned int mask;
1280
1281 rfile = file->private_data;
1282 if (rfile->input != NULL) {
1283 runtime = rfile->input->runtime;
1284 snd_rawmidi_input_trigger(rfile->input, 1);
1285 poll_wait(file, &runtime->sleep, wait);
1286 }
1287 if (rfile->output != NULL) {
1288 runtime = rfile->output->runtime;
1289 poll_wait(file, &runtime->sleep, wait);
1290 }
1291 mask = 0;
1292 if (rfile->input != NULL) {
1293 if (snd_rawmidi_ready(rfile->input))
1294 mask |= POLLIN | POLLRDNORM;
1295 }
1296 if (rfile->output != NULL) {
1297 if (snd_rawmidi_ready(rfile->output))
1298 mask |= POLLOUT | POLLWRNORM;
1299 }
1300 return mask;
1301}
1302
1303/*
1304 */
1305#ifdef CONFIG_COMPAT
1306#include "rawmidi_compat.c"
1307#else
1308#define snd_rawmidi_ioctl_compat NULL
1309#endif
1310
1311/*
1312
1313 */
1314
48c9d417
TI		 1315static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry,
1316 struct snd_info_buffer *buffer)
1da177e4 1317{
48c9d417
TI		 1318 struct snd_rawmidi *rmidi;
1319 struct snd_rawmidi_substream *substream;
1320 struct snd_rawmidi_runtime *runtime;
1da177e4
LT		 1321
1322 rmidi = entry->private_data;
1323 snd_iprintf(buffer, "%s\n\n", rmidi->name);
1a60d4c5 1324 mutex_lock(&rmidi->open_mutex);
1da177e4 1325 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) {
9244b2c3
JB		 1326 list_for_each_entry(substream,
1327 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams,
1328 list) {
1da177e4
LT		 1329 snd_iprintf(buffer,
1330 "Output %d\n"
1331 " Tx bytes : %lu\n",
1332 substream->number,
1333 (unsigned long) substream->bytes);
1334 if (substream->opened) {
7584af10
CL		 1335 snd_iprintf(buffer,
1336 " Owner PID : %d\n",
1337 pid_vnr(substream->pid));
1da177e4
LT		 1338 runtime = substream->runtime;
1339 snd_iprintf(buffer,
1340 " Mode : %s\n"
1341 " Buffer size : %lu\n"
1342 " Avail : %lu\n",
1343 runtime->oss ? "OSS compatible" : "native",
1344 (unsigned long) runtime->buffer_size,
1345 (unsigned long) runtime->avail);
1346 }
1347 }
1348 }
1349 if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) {
9244b2c3
JB		 1350 list_for_each_entry(substream,
1351 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams,
1352 list) {
1da177e4
LT		 1353 snd_iprintf(buffer,
1354 "Input %d\n"
1355 " Rx bytes : %lu\n",
1356 substream->number,
1357 (unsigned long) substream->bytes);
1358 if (substream->opened) {
7584af10
CL		 1359 snd_iprintf(buffer,
1360 " Owner PID : %d\n",
1361 pid_vnr(substream->pid));
1da177e4
LT		 1362 runtime = substream->runtime;
1363 snd_iprintf(buffer,
1364 " Buffer size : %lu\n"
1365 " Avail : %lu\n"
1366 " Overruns : %lu\n",
1367 (unsigned long) runtime->buffer_size,
1368 (unsigned long) runtime->avail,
1369 (unsigned long) runtime->xruns);
1370 }
1371 }
1372 }
1a60d4c5 1373 mutex_unlock(&rmidi->open_mutex);
1da177e4
LT		 1374}
1375
1376/*
1377 * Register functions
1378 */
1379
9c2e08c5 1380static const struct file_operations snd_rawmidi_f_ops =
1da177e4
LT		 1381{
1382 .owner = THIS_MODULE,
1383 .read = snd_rawmidi_read,
1384 .write = snd_rawmidi_write,
1385 .open = snd_rawmidi_open,
1386 .release = snd_rawmidi_release,
02f4865f 1387 .llseek = no_llseek,
1da177e4
LT		 1388 .poll = snd_rawmidi_poll,
1389 .unlocked_ioctl = snd_rawmidi_ioctl,
1390 .compat_ioctl = snd_rawmidi_ioctl_compat,
1391};
1392
48c9d417
TI		 1393static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
1394 struct snd_rawmidi_str *stream,
1da177e4
LT		 1395 int direction,
1396 int count)
1397{
48c9d417 1398 struct snd_rawmidi_substream *substream;
1da177e4
LT		 1399 int idx;
1400
1da177e4 1401 for (idx = 0; idx < count; idx++) {
ca2c0966 1402 substream = kzalloc(sizeof(*substream), GFP_KERNEL);
73e77ba0
TI		 1403 if (substream == NULL) {
1404 snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n");
1da177e4 1405 return -ENOMEM;
73e77ba0 1406 }
1da177e4
LT		 1407 substream->stream = direction;
1408 substream->number = idx;
1409 substream->rmidi = rmidi;
1410 substream->pstr = stream;
1411 list_add_tail(&substream->list, &stream->substreams);
1412 stream->substream_count++;
1413 }
1414 return 0;
1415}
1416
1417/**
1418 * snd_rawmidi_new - create a rawmidi instance
1419 * @card: the card instance
1420 * @id: the id string
1421 * @device: the device index
1422 * @output_count: the number of output streams
1423 * @input_count: the number of input streams
1424 * @rrawmidi: the pointer to store the new rawmidi instance
1425 *
1426 * Creates a new rawmidi instance.
1427 * Use snd_rawmidi_set_ops() to set the operators to the new instance.
1428 *
1429 * Returns zero if successful, or a negative error code on failure.
1430 */
48c9d417 1431int snd_rawmidi_new(struct snd_card *card, char *id, int device,
1da177e4 1432 int output_count, int input_count,
48c9d417 1433 struct snd_rawmidi ** rrawmidi)
1da177e4 1434{
48c9d417 1435 struct snd_rawmidi *rmidi;
1da177e4 1436 int err;
48c9d417 1437 static struct snd_device_ops ops = {
1da177e4
LT		 1438 .dev_free = snd_rawmidi_dev_free,
1439 .dev_register = snd_rawmidi_dev_register,
1440 .dev_disconnect = snd_rawmidi_dev_disconnect,
1da177e4
LT		 1441 };
1442
7eaa943c
TI		 1443 if (snd_BUG_ON(!card))
1444 return -ENXIO;
1445 if (rrawmidi)
1446 *rrawmidi = NULL;
ca2c0966 1447 rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
73e77ba0
TI		 1448 if (rmidi == NULL) {
1449 snd_printk(KERN_ERR "rawmidi: cannot allocate\n");
1da177e4 1450 return -ENOMEM;
73e77ba0 1451 }
1da177e4
LT		 1452 rmidi->card = card;
1453 rmidi->device = device;
1a60d4c5 1454 mutex_init(&rmidi->open_mutex);
1da177e4 1455 init_waitqueue_head(&rmidi->open_wait);
c13893d7
AM		 1456 INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams);
1457 INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams);
1458
1da177e4
LT		 1459 if (id != NULL)
1460 strlcpy(rmidi->id, id, sizeof(rmidi->id));
73e77ba0
TI		 1461 if ((err = snd_rawmidi_alloc_substreams(rmidi,
1462 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT],
1463 SNDRV_RAWMIDI_STREAM_INPUT,
1464 input_count)) < 0) {
1da177e4
LT		 1465 snd_rawmidi_free(rmidi);
1466 return err;
1467 }
73e77ba0
TI		 1468 if ((err = snd_rawmidi_alloc_substreams(rmidi,
1469 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT],
1470 SNDRV_RAWMIDI_STREAM_OUTPUT,
1471 output_count)) < 0) {
1da177e4
LT		 1472 snd_rawmidi_free(rmidi);
1473 return err;
1474 }
1475 if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) {
1476 snd_rawmidi_free(rmidi);
1477 return err;
1478 }
7eaa943c
TI		 1479 if (rrawmidi)
1480 *rrawmidi = rmidi;
1da177e4
LT		 1481 return 0;
1482}
1483
48c9d417 1484static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream)
1da177e4 1485{
48c9d417 1486 struct snd_rawmidi_substream *substream;
1da177e4
LT		 1487
1488 while (!list_empty(&stream->substreams)) {
48c9d417 1489 substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list);
1da177e4
LT		 1490 list_del(&substream->list);
1491 kfree(substream);
1492 }
1493}
1494
48c9d417 1495static int snd_rawmidi_free(struct snd_rawmidi *rmidi)
1da177e4 1496{
7eaa943c
TI		 1497 if (!rmidi)
1498 return 0;
c461482c
TI		 1499
1500 snd_info_free_entry(rmidi->proc_entry);
1501 rmidi->proc_entry = NULL;
1502 mutex_lock(&register_mutex);
1503 if (rmidi->ops && rmidi->ops->dev_unregister)
1504 rmidi->ops->dev_unregister(rmidi);
1505 mutex_unlock(&register_mutex);
1506
1da177e4
LT		 1507 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]);
1508 snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]);
1509 if (rmidi->private_free)
1510 rmidi->private_free(rmidi);
1511 kfree(rmidi);
1512 return 0;
1513}
1514
48c9d417 1515static int snd_rawmidi_dev_free(struct snd_device *device)
1da177e4 1516{
48c9d417 1517 struct snd_rawmidi *rmidi = device->device_data;
1da177e4
LT		 1518 return snd_rawmidi_free(rmidi);
1519}
1520
1521#if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
48c9d417 1522static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device)
1da177e4 1523{
48c9d417 1524 struct snd_rawmidi *rmidi = device->private_data;
1da177e4
LT		 1525 rmidi->seq_dev = NULL;
1526}
1527#endif
1528
48c9d417 1529static int snd_rawmidi_dev_register(struct snd_device *device)
1da177e4 1530{
f87135f5 1531 int err;
48c9d417 1532 struct snd_info_entry *entry;
1da177e4 1533 char name[16];
48c9d417 1534 struct snd_rawmidi *rmidi = device->device_data;
1da177e4
LT		 1535
1536 if (rmidi->device >= SNDRV_RAWMIDI_DEVICES)
1537 return -ENOMEM;
1a60d4c5 1538 mutex_lock(&register_mutex);
f87135f5 1539 if (snd_rawmidi_search(rmidi->card, rmidi->device)) {
1a60d4c5 1540 mutex_unlock(&register_mutex);
1da177e4
LT		 1541 return -EBUSY;
1542 }
f87135f5 1543 list_add_tail(&rmidi->list, &snd_rawmidi_devices);
1da177e4
LT		 1544 sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device);
1545 if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI,
1546 rmidi->card, rmidi->device,
f87135f5 1547 &snd_rawmidi_f_ops, rmidi, name)) < 0) {
1da177e4 1548 snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device);
f87135f5 1549 list_del(&rmidi->list);
1a60d4c5 1550 mutex_unlock(&register_mutex);
1da177e4
LT		 1551 return err;
1552 }
1553 if (rmidi->ops && rmidi->ops->dev_register &&
1554 (err = rmidi->ops->dev_register(rmidi)) < 0) {
1555 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
f87135f5 1556 list_del(&rmidi->list);
1a60d4c5 1557 mutex_unlock(&register_mutex);
1da177e4
LT		 1558 return err;
1559 }
1560#ifdef CONFIG_SND_OSSEMUL
1561 rmidi->ossreg = 0;
1562 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1563 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
f87135f5
CL		 1564 rmidi->card, 0, &snd_rawmidi_f_ops,
1565 rmidi, name) < 0) {
1da177e4
LT		 1566 snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0);
1567 } else {
1568 rmidi->ossreg++;
1569#ifdef SNDRV_OSS_INFO_DEV_MIDI
1570 snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name);
1571#endif
1572 }
1573 }
1574 if ((int)rmidi->device == amidi_map[rmidi->card->number]) {
1575 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
f87135f5
CL		 1576 rmidi->card, 1, &snd_rawmidi_f_ops,
1577 rmidi, name) < 0) {
1da177e4
LT		 1578 snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1);
1579 } else {
1580 rmidi->ossreg++;
1581 }
1582 }
1583#endif /* CONFIG_SND_OSSEMUL */
1a60d4c5 1584 mutex_unlock(&register_mutex);
1da177e4
LT		 1585 sprintf(name, "midi%d", rmidi->device);
1586 entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root);
1587 if (entry) {
1588 entry->private_data = rmidi;
1da177e4
LT		 1589 entry->c.text.read = snd_rawmidi_proc_info_read;
1590 if (snd_info_register(entry) < 0) {
1591 snd_info_free_entry(entry);
1592 entry = NULL;
1593 }
1594 }
1595 rmidi->proc_entry = entry;
1596#if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1597 if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */
1598 if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) {
1599 rmidi->seq_dev->private_data = rmidi;
1600 rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free;
1601 sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device);
1602 snd_device_register(rmidi->card, rmidi->seq_dev);
1603 }
1604 }
1605#endif
1606 return 0;
1607}
1608
48c9d417 1609static int snd_rawmidi_dev_disconnect(struct snd_device *device)
1da177e4 1610{
48c9d417 1611 struct snd_rawmidi *rmidi = device->device_data;
1da177e4 1612
1a60d4c5 1613 mutex_lock(&register_mutex);
f87135f5 1614 list_del_init(&rmidi->list);
1da177e4
LT		 1615#ifdef CONFIG_SND_OSSEMUL
1616 if (rmidi->ossreg) {
1617 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1618 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0);
1619#ifdef SNDRV_OSS_INFO_DEV_MIDI
1620 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number);
1621#endif
1622 }
1623 if ((int)rmidi->device == amidi_map[rmidi->card->number])
1624 snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1);
1625 rmidi->ossreg = 0;
1626 }
1627#endif /* CONFIG_SND_OSSEMUL */
1da177e4 1628 snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device);
1a60d4c5 1629 mutex_unlock(&register_mutex);
c461482c 1630 return 0;
1da177e4
LT		 1631}
1632
1633/**
1634 * snd_rawmidi_set_ops - set the rawmidi operators
1635 * @rmidi: the rawmidi instance
1636 * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX
1637 * @ops: the operator table
1638 *
1639 * Sets the rawmidi operators for the given stream direction.
1640 */
48c9d417
TI		 1641void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
1642 struct snd_rawmidi_ops *ops)
1da177e4 1643{
48c9d417 1644 struct snd_rawmidi_substream *substream;
1da177e4 1645
9244b2c3 1646 list_for_each_entry(substream, &rmidi->streams[stream].substreams, list)
1da177e4 1647 substream->ops = ops;
1da177e4
LT		 1648}
1649
1650/*
1651 * ENTRY functions
1652 */
1653
1654static int __init alsa_rawmidi_init(void)
1655{
1656
1657 snd_ctl_register_ioctl(snd_rawmidi_control_ioctl);
1658 snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl);
1659#ifdef CONFIG_SND_OSSEMUL
1660 { int i;
1661 /* check device map table */
1662 for (i = 0; i < SNDRV_CARDS; i++) {
1663 if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1664 snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]);
1665 midi_map[i] = 0;
1666 }
1667 if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1668 snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]);
1669 amidi_map[i] = 1;
1670 }
1671 }
1672 }
1673#endif /* CONFIG_SND_OSSEMUL */
1674 return 0;
1675}
1676
1677static void __exit alsa_rawmidi_exit(void)
1678{
1679 snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl);
1680 snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl);
1681}
1682
1683module_init(alsa_rawmidi_init)
1684module_exit(alsa_rawmidi_exit)
1685
1686EXPORT_SYMBOL(snd_rawmidi_output_params);
1687EXPORT_SYMBOL(snd_rawmidi_input_params);
1688EXPORT_SYMBOL(snd_rawmidi_drop_output);
1689EXPORT_SYMBOL(snd_rawmidi_drain_output);
1690EXPORT_SYMBOL(snd_rawmidi_drain_input);
1691EXPORT_SYMBOL(snd_rawmidi_receive);
1692EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
1693EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
1694EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
1695EXPORT_SYMBOL(snd_rawmidi_transmit);
1696EXPORT_SYMBOL(snd_rawmidi_new);
1697EXPORT_SYMBOL(snd_rawmidi_set_ops);
1da177e4
LT		 1698EXPORT_SYMBOL(snd_rawmidi_info_select);
1699EXPORT_SYMBOL(snd_rawmidi_kernel_open);
1700EXPORT_SYMBOL(snd_rawmidi_kernel_release);
1701EXPORT_SYMBOL(snd_rawmidi_kernel_read);
1702EXPORT_SYMBOL(snd_rawmidi_kernel_write);
Linux kernel - Deliverables
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