Root/
1 | /* |
2 | * Abstract layer for MIDI v1.0 stream |
3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
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 | |
22 | #include <sound/core.h> |
23 | #include <linux/major.h> |
24 | #include <linux/init.h> |
25 | #include <linux/sched.h> |
26 | #include <linux/slab.h> |
27 | #include <linux/time.h> |
28 | #include <linux/wait.h> |
29 | #include <linux/mutex.h> |
30 | #include <linux/moduleparam.h> |
31 | #include <linux/delay.h> |
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 | |
38 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
39 | MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA."); |
40 | MODULE_LICENSE("GPL"); |
41 | |
42 | #ifdef CONFIG_SND_OSSEMUL |
43 | static int midi_map[SNDRV_CARDS]; |
44 | static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; |
45 | module_param_array(midi_map, int, NULL, 0444); |
46 | MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device."); |
47 | module_param_array(amidi_map, int, NULL, 0444); |
48 | MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device."); |
49 | #endif /* CONFIG_SND_OSSEMUL */ |
50 | |
51 | static int snd_rawmidi_free(struct snd_rawmidi *rawmidi); |
52 | static int snd_rawmidi_dev_free(struct snd_device *device); |
53 | static int snd_rawmidi_dev_register(struct snd_device *device); |
54 | static int snd_rawmidi_dev_disconnect(struct snd_device *device); |
55 | |
56 | static LIST_HEAD(snd_rawmidi_devices); |
57 | static DEFINE_MUTEX(register_mutex); |
58 | |
59 | static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device) |
60 | { |
61 | struct snd_rawmidi *rawmidi; |
62 | |
63 | list_for_each_entry(rawmidi, &snd_rawmidi_devices, list) |
64 | if (rawmidi->card == card && rawmidi->device == device) |
65 | return rawmidi; |
66 | return NULL; |
67 | } |
68 | |
69 | static 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 | |
81 | static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream) |
82 | { |
83 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
84 | return runtime->avail >= runtime->avail_min; |
85 | } |
86 | |
87 | static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream, |
88 | size_t count) |
89 | { |
90 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
91 | return runtime->avail >= runtime->avail_min && |
92 | (!substream->append || runtime->avail >= count); |
93 | } |
94 | |
95 | static void snd_rawmidi_input_event_tasklet(unsigned long data) |
96 | { |
97 | struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data; |
98 | substream->runtime->event(substream); |
99 | } |
100 | |
101 | static void snd_rawmidi_output_trigger_tasklet(unsigned long data) |
102 | { |
103 | struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data; |
104 | substream->ops->trigger(substream, 1); |
105 | } |
106 | |
107 | static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream) |
108 | { |
109 | struct snd_rawmidi_runtime *runtime; |
110 | |
111 | if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL) |
112 | return -ENOMEM; |
113 | spin_lock_init(&runtime->lock); |
114 | init_waitqueue_head(&runtime->sleep); |
115 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) |
116 | tasklet_init(&runtime->tasklet, |
117 | snd_rawmidi_input_event_tasklet, |
118 | (unsigned long)substream); |
119 | else |
120 | tasklet_init(&runtime->tasklet, |
121 | snd_rawmidi_output_trigger_tasklet, |
122 | (unsigned long)substream); |
123 | runtime->event = NULL; |
124 | runtime->buffer_size = PAGE_SIZE; |
125 | runtime->avail_min = 1; |
126 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) |
127 | runtime->avail = 0; |
128 | else |
129 | runtime->avail = runtime->buffer_size; |
130 | if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) { |
131 | kfree(runtime); |
132 | return -ENOMEM; |
133 | } |
134 | runtime->appl_ptr = runtime->hw_ptr = 0; |
135 | substream->runtime = runtime; |
136 | return 0; |
137 | } |
138 | |
139 | static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream) |
140 | { |
141 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
142 | |
143 | kfree(runtime->buffer); |
144 | kfree(runtime); |
145 | substream->runtime = NULL; |
146 | return 0; |
147 | } |
148 | |
149 | static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up) |
150 | { |
151 | if (!substream->opened) |
152 | return; |
153 | if (up) { |
154 | tasklet_schedule(&substream->runtime->tasklet); |
155 | } else { |
156 | tasklet_kill(&substream->runtime->tasklet); |
157 | substream->ops->trigger(substream, 0); |
158 | } |
159 | } |
160 | |
161 | static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
162 | { |
163 | if (!substream->opened) |
164 | return; |
165 | substream->ops->trigger(substream, up); |
166 | if (!up && substream->runtime->event) |
167 | tasklet_kill(&substream->runtime->tasklet); |
168 | } |
169 | |
170 | int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream) |
171 | { |
172 | unsigned long flags; |
173 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
174 | |
175 | snd_rawmidi_output_trigger(substream, 0); |
176 | runtime->drain = 0; |
177 | spin_lock_irqsave(&runtime->lock, flags); |
178 | runtime->appl_ptr = runtime->hw_ptr = 0; |
179 | runtime->avail = runtime->buffer_size; |
180 | spin_unlock_irqrestore(&runtime->lock, flags); |
181 | return 0; |
182 | } |
183 | |
184 | int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream) |
185 | { |
186 | int err; |
187 | long timeout; |
188 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
189 | |
190 | err = 0; |
191 | runtime->drain = 1; |
192 | timeout = wait_event_interruptible_timeout(runtime->sleep, |
193 | (runtime->avail >= runtime->buffer_size), |
194 | 10*HZ); |
195 | if (signal_pending(current)) |
196 | err = -ERESTARTSYS; |
197 | if (runtime->avail < runtime->buffer_size && !timeout) { |
198 | snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size); |
199 | err = -EIO; |
200 | } |
201 | runtime->drain = 0; |
202 | if (err != -ERESTARTSYS) { |
203 | /* we need wait a while to make sure that Tx FIFOs are empty */ |
204 | if (substream->ops->drain) |
205 | substream->ops->drain(substream); |
206 | else |
207 | msleep(50); |
208 | snd_rawmidi_drop_output(substream); |
209 | } |
210 | return err; |
211 | } |
212 | |
213 | int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream) |
214 | { |
215 | unsigned long flags; |
216 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
217 | |
218 | snd_rawmidi_input_trigger(substream, 0); |
219 | runtime->drain = 0; |
220 | spin_lock_irqsave(&runtime->lock, flags); |
221 | runtime->appl_ptr = runtime->hw_ptr = 0; |
222 | runtime->avail = 0; |
223 | spin_unlock_irqrestore(&runtime->lock, flags); |
224 | return 0; |
225 | } |
226 | |
227 | /* look for an available substream for the given stream direction; |
228 | * if a specific subdevice is given, try to assign it |
229 | */ |
230 | static int assign_substream(struct snd_rawmidi *rmidi, int subdevice, |
231 | int stream, int mode, |
232 | struct snd_rawmidi_substream **sub_ret) |
233 | { |
234 | struct snd_rawmidi_substream *substream; |
235 | struct snd_rawmidi_str *s = &rmidi->streams[stream]; |
236 | static unsigned int info_flags[2] = { |
237 | [SNDRV_RAWMIDI_STREAM_OUTPUT] = SNDRV_RAWMIDI_INFO_OUTPUT, |
238 | [SNDRV_RAWMIDI_STREAM_INPUT] = SNDRV_RAWMIDI_INFO_INPUT, |
239 | }; |
240 | |
241 | if (!(rmidi->info_flags & info_flags[stream])) |
242 | return -ENXIO; |
243 | if (subdevice >= 0 && subdevice >= s->substream_count) |
244 | return -ENODEV; |
245 | |
246 | list_for_each_entry(substream, &s->substreams, list) { |
247 | if (substream->opened) { |
248 | if (stream == SNDRV_RAWMIDI_STREAM_INPUT || |
249 | !(mode & SNDRV_RAWMIDI_LFLG_APPEND) || |
250 | !substream->append) |
251 | continue; |
252 | } |
253 | if (subdevice < 0 || subdevice == substream->number) { |
254 | *sub_ret = substream; |
255 | return 0; |
256 | } |
257 | } |
258 | return -EAGAIN; |
259 | } |
260 | |
261 | /* open and do ref-counting for the given substream */ |
262 | static int open_substream(struct snd_rawmidi *rmidi, |
263 | struct snd_rawmidi_substream *substream, |
264 | int mode) |
265 | { |
266 | int err; |
267 | |
268 | if (substream->use_count == 0) { |
269 | err = snd_rawmidi_runtime_create(substream); |
270 | if (err < 0) |
271 | return err; |
272 | err = substream->ops->open(substream); |
273 | if (err < 0) { |
274 | snd_rawmidi_runtime_free(substream); |
275 | return err; |
276 | } |
277 | substream->opened = 1; |
278 | substream->active_sensing = 0; |
279 | if (mode & SNDRV_RAWMIDI_LFLG_APPEND) |
280 | substream->append = 1; |
281 | substream->pid = get_pid(task_pid(current)); |
282 | rmidi->streams[substream->stream].substream_opened++; |
283 | } |
284 | substream->use_count++; |
285 | return 0; |
286 | } |
287 | |
288 | static void close_substream(struct snd_rawmidi *rmidi, |
289 | struct snd_rawmidi_substream *substream, |
290 | int cleanup); |
291 | |
292 | static int rawmidi_open_priv(struct snd_rawmidi *rmidi, int subdevice, int mode, |
293 | struct snd_rawmidi_file *rfile) |
294 | { |
295 | struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL; |
296 | int err; |
297 | |
298 | rfile->input = rfile->output = NULL; |
299 | if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { |
300 | err = assign_substream(rmidi, subdevice, |
301 | SNDRV_RAWMIDI_STREAM_INPUT, |
302 | mode, &sinput); |
303 | if (err < 0) |
304 | return err; |
305 | } |
306 | if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { |
307 | err = assign_substream(rmidi, subdevice, |
308 | SNDRV_RAWMIDI_STREAM_OUTPUT, |
309 | mode, &soutput); |
310 | if (err < 0) |
311 | return err; |
312 | } |
313 | |
314 | if (sinput) { |
315 | err = open_substream(rmidi, sinput, mode); |
316 | if (err < 0) |
317 | return err; |
318 | } |
319 | if (soutput) { |
320 | err = open_substream(rmidi, soutput, mode); |
321 | if (err < 0) { |
322 | if (sinput) |
323 | close_substream(rmidi, sinput, 0); |
324 | return err; |
325 | } |
326 | } |
327 | |
328 | rfile->rmidi = rmidi; |
329 | rfile->input = sinput; |
330 | rfile->output = soutput; |
331 | return 0; |
332 | } |
333 | |
334 | /* called from sound/core/seq/seq_midi.c */ |
335 | int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, |
336 | int mode, struct snd_rawmidi_file * rfile) |
337 | { |
338 | struct snd_rawmidi *rmidi; |
339 | int err; |
340 | |
341 | if (snd_BUG_ON(!rfile)) |
342 | return -EINVAL; |
343 | |
344 | mutex_lock(®ister_mutex); |
345 | rmidi = snd_rawmidi_search(card, device); |
346 | if (rmidi == NULL) { |
347 | mutex_unlock(®ister_mutex); |
348 | return -ENODEV; |
349 | } |
350 | if (!try_module_get(rmidi->card->module)) { |
351 | mutex_unlock(®ister_mutex); |
352 | return -ENXIO; |
353 | } |
354 | mutex_unlock(®ister_mutex); |
355 | |
356 | mutex_lock(&rmidi->open_mutex); |
357 | err = rawmidi_open_priv(rmidi, subdevice, mode, rfile); |
358 | mutex_unlock(&rmidi->open_mutex); |
359 | if (err < 0) |
360 | module_put(rmidi->card->module); |
361 | return err; |
362 | } |
363 | |
364 | static int snd_rawmidi_open(struct inode *inode, struct file *file) |
365 | { |
366 | int maj = imajor(inode); |
367 | struct snd_card *card; |
368 | int subdevice; |
369 | unsigned short fflags; |
370 | int err; |
371 | struct snd_rawmidi *rmidi; |
372 | struct snd_rawmidi_file *rawmidi_file = NULL; |
373 | wait_queue_t wait; |
374 | struct snd_ctl_file *kctl; |
375 | |
376 | if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) |
377 | return -EINVAL; /* invalid combination */ |
378 | |
379 | err = nonseekable_open(inode, file); |
380 | if (err < 0) |
381 | return err; |
382 | |
383 | if (maj == snd_major) { |
384 | rmidi = snd_lookup_minor_data(iminor(inode), |
385 | SNDRV_DEVICE_TYPE_RAWMIDI); |
386 | #ifdef CONFIG_SND_OSSEMUL |
387 | } else if (maj == SOUND_MAJOR) { |
388 | rmidi = snd_lookup_oss_minor_data(iminor(inode), |
389 | SNDRV_OSS_DEVICE_TYPE_MIDI); |
390 | #endif |
391 | } else |
392 | return -ENXIO; |
393 | |
394 | if (rmidi == NULL) |
395 | return -ENODEV; |
396 | |
397 | if (!try_module_get(rmidi->card->module)) |
398 | return -ENXIO; |
399 | |
400 | mutex_lock(&rmidi->open_mutex); |
401 | card = rmidi->card; |
402 | err = snd_card_file_add(card, file); |
403 | if (err < 0) |
404 | goto __error_card; |
405 | fflags = snd_rawmidi_file_flags(file); |
406 | if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */ |
407 | fflags |= SNDRV_RAWMIDI_LFLG_APPEND; |
408 | rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL); |
409 | if (rawmidi_file == NULL) { |
410 | err = -ENOMEM; |
411 | goto __error; |
412 | } |
413 | init_waitqueue_entry(&wait, current); |
414 | add_wait_queue(&rmidi->open_wait, &wait); |
415 | while (1) { |
416 | subdevice = -1; |
417 | read_lock(&card->ctl_files_rwlock); |
418 | list_for_each_entry(kctl, &card->ctl_files, list) { |
419 | if (kctl->pid == task_pid(current)) { |
420 | subdevice = kctl->prefer_rawmidi_subdevice; |
421 | if (subdevice != -1) |
422 | break; |
423 | } |
424 | } |
425 | read_unlock(&card->ctl_files_rwlock); |
426 | err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file); |
427 | if (err >= 0) |
428 | break; |
429 | if (err == -EAGAIN) { |
430 | if (file->f_flags & O_NONBLOCK) { |
431 | err = -EBUSY; |
432 | break; |
433 | } |
434 | } else |
435 | break; |
436 | set_current_state(TASK_INTERRUPTIBLE); |
437 | mutex_unlock(&rmidi->open_mutex); |
438 | schedule(); |
439 | mutex_lock(&rmidi->open_mutex); |
440 | if (signal_pending(current)) { |
441 | err = -ERESTARTSYS; |
442 | break; |
443 | } |
444 | } |
445 | remove_wait_queue(&rmidi->open_wait, &wait); |
446 | if (err < 0) { |
447 | kfree(rawmidi_file); |
448 | goto __error; |
449 | } |
450 | #ifdef CONFIG_SND_OSSEMUL |
451 | if (rawmidi_file->input && rawmidi_file->input->runtime) |
452 | rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR); |
453 | if (rawmidi_file->output && rawmidi_file->output->runtime) |
454 | rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR); |
455 | #endif |
456 | file->private_data = rawmidi_file; |
457 | mutex_unlock(&rmidi->open_mutex); |
458 | return 0; |
459 | |
460 | __error: |
461 | snd_card_file_remove(card, file); |
462 | __error_card: |
463 | mutex_unlock(&rmidi->open_mutex); |
464 | module_put(rmidi->card->module); |
465 | return err; |
466 | } |
467 | |
468 | static void close_substream(struct snd_rawmidi *rmidi, |
469 | struct snd_rawmidi_substream *substream, |
470 | int cleanup) |
471 | { |
472 | if (--substream->use_count) |
473 | return; |
474 | |
475 | if (cleanup) { |
476 | if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) |
477 | snd_rawmidi_input_trigger(substream, 0); |
478 | else { |
479 | if (substream->active_sensing) { |
480 | unsigned char buf = 0xfe; |
481 | /* sending single active sensing message |
482 | * to shut the device up |
483 | */ |
484 | snd_rawmidi_kernel_write(substream, &buf, 1); |
485 | } |
486 | if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS) |
487 | snd_rawmidi_output_trigger(substream, 0); |
488 | } |
489 | } |
490 | substream->ops->close(substream); |
491 | if (substream->runtime->private_free) |
492 | substream->runtime->private_free(substream); |
493 | snd_rawmidi_runtime_free(substream); |
494 | substream->opened = 0; |
495 | substream->append = 0; |
496 | put_pid(substream->pid); |
497 | substream->pid = NULL; |
498 | rmidi->streams[substream->stream].substream_opened--; |
499 | } |
500 | |
501 | static void rawmidi_release_priv(struct snd_rawmidi_file *rfile) |
502 | { |
503 | struct snd_rawmidi *rmidi; |
504 | |
505 | rmidi = rfile->rmidi; |
506 | mutex_lock(&rmidi->open_mutex); |
507 | if (rfile->input) { |
508 | close_substream(rmidi, rfile->input, 1); |
509 | rfile->input = NULL; |
510 | } |
511 | if (rfile->output) { |
512 | close_substream(rmidi, rfile->output, 1); |
513 | rfile->output = NULL; |
514 | } |
515 | rfile->rmidi = NULL; |
516 | mutex_unlock(&rmidi->open_mutex); |
517 | wake_up(&rmidi->open_wait); |
518 | } |
519 | |
520 | /* called from sound/core/seq/seq_midi.c */ |
521 | int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile) |
522 | { |
523 | struct snd_rawmidi *rmidi; |
524 | |
525 | if (snd_BUG_ON(!rfile)) |
526 | return -ENXIO; |
527 | |
528 | rmidi = rfile->rmidi; |
529 | rawmidi_release_priv(rfile); |
530 | module_put(rmidi->card->module); |
531 | return 0; |
532 | } |
533 | |
534 | static int snd_rawmidi_release(struct inode *inode, struct file *file) |
535 | { |
536 | struct snd_rawmidi_file *rfile; |
537 | struct snd_rawmidi *rmidi; |
538 | struct module *module; |
539 | |
540 | rfile = file->private_data; |
541 | rmidi = rfile->rmidi; |
542 | rawmidi_release_priv(rfile); |
543 | kfree(rfile); |
544 | module = rmidi->card->module; |
545 | snd_card_file_remove(rmidi->card, file); |
546 | module_put(module); |
547 | return 0; |
548 | } |
549 | |
550 | static int snd_rawmidi_info(struct snd_rawmidi_substream *substream, |
551 | struct snd_rawmidi_info *info) |
552 | { |
553 | struct snd_rawmidi *rmidi; |
554 | |
555 | if (substream == NULL) |
556 | return -ENODEV; |
557 | rmidi = substream->rmidi; |
558 | memset(info, 0, sizeof(*info)); |
559 | info->card = rmidi->card->number; |
560 | info->device = rmidi->device; |
561 | info->subdevice = substream->number; |
562 | info->stream = substream->stream; |
563 | info->flags = rmidi->info_flags; |
564 | strcpy(info->id, rmidi->id); |
565 | strcpy(info->name, rmidi->name); |
566 | strcpy(info->subname, substream->name); |
567 | info->subdevices_count = substream->pstr->substream_count; |
568 | info->subdevices_avail = (substream->pstr->substream_count - |
569 | substream->pstr->substream_opened); |
570 | return 0; |
571 | } |
572 | |
573 | static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream, |
574 | struct snd_rawmidi_info __user * _info) |
575 | { |
576 | struct snd_rawmidi_info info; |
577 | int err; |
578 | if ((err = snd_rawmidi_info(substream, &info)) < 0) |
579 | return err; |
580 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
581 | return -EFAULT; |
582 | return 0; |
583 | } |
584 | |
585 | int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info) |
586 | { |
587 | struct snd_rawmidi *rmidi; |
588 | struct snd_rawmidi_str *pstr; |
589 | struct snd_rawmidi_substream *substream; |
590 | |
591 | mutex_lock(®ister_mutex); |
592 | rmidi = snd_rawmidi_search(card, info->device); |
593 | mutex_unlock(®ister_mutex); |
594 | if (!rmidi) |
595 | return -ENXIO; |
596 | if (info->stream < 0 || info->stream > 1) |
597 | return -EINVAL; |
598 | pstr = &rmidi->streams[info->stream]; |
599 | if (pstr->substream_count == 0) |
600 | return -ENOENT; |
601 | if (info->subdevice >= pstr->substream_count) |
602 | return -ENXIO; |
603 | list_for_each_entry(substream, &pstr->substreams, list) { |
604 | if ((unsigned int)substream->number == info->subdevice) |
605 | return snd_rawmidi_info(substream, info); |
606 | } |
607 | return -ENXIO; |
608 | } |
609 | |
610 | static int snd_rawmidi_info_select_user(struct snd_card *card, |
611 | struct snd_rawmidi_info __user *_info) |
612 | { |
613 | int err; |
614 | struct snd_rawmidi_info info; |
615 | if (get_user(info.device, &_info->device)) |
616 | return -EFAULT; |
617 | if (get_user(info.stream, &_info->stream)) |
618 | return -EFAULT; |
619 | if (get_user(info.subdevice, &_info->subdevice)) |
620 | return -EFAULT; |
621 | if ((err = snd_rawmidi_info_select(card, &info)) < 0) |
622 | return err; |
623 | if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
624 | return -EFAULT; |
625 | return 0; |
626 | } |
627 | |
628 | int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, |
629 | struct snd_rawmidi_params * params) |
630 | { |
631 | char *newbuf; |
632 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
633 | |
634 | if (substream->append && substream->use_count > 1) |
635 | return -EBUSY; |
636 | snd_rawmidi_drain_output(substream); |
637 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { |
638 | return -EINVAL; |
639 | } |
640 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { |
641 | return -EINVAL; |
642 | } |
643 | if (params->buffer_size != runtime->buffer_size) { |
644 | newbuf = kmalloc(params->buffer_size, GFP_KERNEL); |
645 | if (!newbuf) |
646 | return -ENOMEM; |
647 | kfree(runtime->buffer); |
648 | runtime->buffer = newbuf; |
649 | runtime->buffer_size = params->buffer_size; |
650 | runtime->avail = runtime->buffer_size; |
651 | } |
652 | runtime->avail_min = params->avail_min; |
653 | substream->active_sensing = !params->no_active_sensing; |
654 | return 0; |
655 | } |
656 | |
657 | int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, |
658 | struct snd_rawmidi_params * params) |
659 | { |
660 | char *newbuf; |
661 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
662 | |
663 | snd_rawmidi_drain_input(substream); |
664 | if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { |
665 | return -EINVAL; |
666 | } |
667 | if (params->avail_min < 1 || params->avail_min > params->buffer_size) { |
668 | return -EINVAL; |
669 | } |
670 | if (params->buffer_size != runtime->buffer_size) { |
671 | newbuf = kmalloc(params->buffer_size, GFP_KERNEL); |
672 | if (!newbuf) |
673 | return -ENOMEM; |
674 | kfree(runtime->buffer); |
675 | runtime->buffer = newbuf; |
676 | runtime->buffer_size = params->buffer_size; |
677 | } |
678 | runtime->avail_min = params->avail_min; |
679 | return 0; |
680 | } |
681 | |
682 | static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream, |
683 | struct snd_rawmidi_status * status) |
684 | { |
685 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
686 | |
687 | memset(status, 0, sizeof(*status)); |
688 | status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; |
689 | spin_lock_irq(&runtime->lock); |
690 | status->avail = runtime->avail; |
691 | spin_unlock_irq(&runtime->lock); |
692 | return 0; |
693 | } |
694 | |
695 | static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream, |
696 | struct snd_rawmidi_status * status) |
697 | { |
698 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
699 | |
700 | memset(status, 0, sizeof(*status)); |
701 | status->stream = SNDRV_RAWMIDI_STREAM_INPUT; |
702 | spin_lock_irq(&runtime->lock); |
703 | status->avail = runtime->avail; |
704 | status->xruns = runtime->xruns; |
705 | runtime->xruns = 0; |
706 | spin_unlock_irq(&runtime->lock); |
707 | return 0; |
708 | } |
709 | |
710 | static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
711 | { |
712 | struct snd_rawmidi_file *rfile; |
713 | void __user *argp = (void __user *)arg; |
714 | |
715 | rfile = file->private_data; |
716 | if (((cmd >> 8) & 0xff) != 'W') |
717 | return -ENOTTY; |
718 | switch (cmd) { |
719 | case SNDRV_RAWMIDI_IOCTL_PVERSION: |
720 | return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0; |
721 | case SNDRV_RAWMIDI_IOCTL_INFO: |
722 | { |
723 | int stream; |
724 | struct snd_rawmidi_info __user *info = argp; |
725 | if (get_user(stream, &info->stream)) |
726 | return -EFAULT; |
727 | switch (stream) { |
728 | case SNDRV_RAWMIDI_STREAM_INPUT: |
729 | return snd_rawmidi_info_user(rfile->input, info); |
730 | case SNDRV_RAWMIDI_STREAM_OUTPUT: |
731 | return snd_rawmidi_info_user(rfile->output, info); |
732 | default: |
733 | return -EINVAL; |
734 | } |
735 | } |
736 | case SNDRV_RAWMIDI_IOCTL_PARAMS: |
737 | { |
738 | struct snd_rawmidi_params params; |
739 | if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params))) |
740 | return -EFAULT; |
741 | switch (params.stream) { |
742 | case SNDRV_RAWMIDI_STREAM_OUTPUT: |
743 | if (rfile->output == NULL) |
744 | return -EINVAL; |
745 | return snd_rawmidi_output_params(rfile->output, ¶ms); |
746 | case SNDRV_RAWMIDI_STREAM_INPUT: |
747 | if (rfile->input == NULL) |
748 | return -EINVAL; |
749 | return snd_rawmidi_input_params(rfile->input, ¶ms); |
750 | default: |
751 | return -EINVAL; |
752 | } |
753 | } |
754 | case SNDRV_RAWMIDI_IOCTL_STATUS: |
755 | { |
756 | int err = 0; |
757 | struct snd_rawmidi_status status; |
758 | if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status))) |
759 | return -EFAULT; |
760 | switch (status.stream) { |
761 | case SNDRV_RAWMIDI_STREAM_OUTPUT: |
762 | if (rfile->output == NULL) |
763 | return -EINVAL; |
764 | err = snd_rawmidi_output_status(rfile->output, &status); |
765 | break; |
766 | case SNDRV_RAWMIDI_STREAM_INPUT: |
767 | if (rfile->input == NULL) |
768 | return -EINVAL; |
769 | err = snd_rawmidi_input_status(rfile->input, &status); |
770 | break; |
771 | default: |
772 | return -EINVAL; |
773 | } |
774 | if (err < 0) |
775 | return err; |
776 | if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status))) |
777 | return -EFAULT; |
778 | return 0; |
779 | } |
780 | case SNDRV_RAWMIDI_IOCTL_DROP: |
781 | { |
782 | int val; |
783 | if (get_user(val, (int __user *) argp)) |
784 | return -EFAULT; |
785 | switch (val) { |
786 | case SNDRV_RAWMIDI_STREAM_OUTPUT: |
787 | if (rfile->output == NULL) |
788 | return -EINVAL; |
789 | return snd_rawmidi_drop_output(rfile->output); |
790 | default: |
791 | return -EINVAL; |
792 | } |
793 | } |
794 | case SNDRV_RAWMIDI_IOCTL_DRAIN: |
795 | { |
796 | int val; |
797 | if (get_user(val, (int __user *) argp)) |
798 | return -EFAULT; |
799 | switch (val) { |
800 | case SNDRV_RAWMIDI_STREAM_OUTPUT: |
801 | if (rfile->output == NULL) |
802 | return -EINVAL; |
803 | return snd_rawmidi_drain_output(rfile->output); |
804 | case SNDRV_RAWMIDI_STREAM_INPUT: |
805 | if (rfile->input == NULL) |
806 | return -EINVAL; |
807 | return snd_rawmidi_drain_input(rfile->input); |
808 | default: |
809 | return -EINVAL; |
810 | } |
811 | } |
812 | #ifdef CONFIG_SND_DEBUG |
813 | default: |
814 | snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd); |
815 | #endif |
816 | } |
817 | return -ENOTTY; |
818 | } |
819 | |
820 | static int snd_rawmidi_control_ioctl(struct snd_card *card, |
821 | struct snd_ctl_file *control, |
822 | unsigned int cmd, |
823 | unsigned long arg) |
824 | { |
825 | void __user *argp = (void __user *)arg; |
826 | |
827 | switch (cmd) { |
828 | case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE: |
829 | { |
830 | int device; |
831 | |
832 | if (get_user(device, (int __user *)argp)) |
833 | return -EFAULT; |
834 | if (device >= SNDRV_RAWMIDI_DEVICES) /* next device is -1 */ |
835 | device = SNDRV_RAWMIDI_DEVICES - 1; |
836 | mutex_lock(®ister_mutex); |
837 | device = device < 0 ? 0 : device + 1; |
838 | while (device < SNDRV_RAWMIDI_DEVICES) { |
839 | if (snd_rawmidi_search(card, device)) |
840 | break; |
841 | device++; |
842 | } |
843 | if (device == SNDRV_RAWMIDI_DEVICES) |
844 | device = -1; |
845 | mutex_unlock(®ister_mutex); |
846 | if (put_user(device, (int __user *)argp)) |
847 | return -EFAULT; |
848 | return 0; |
849 | } |
850 | case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE: |
851 | { |
852 | int val; |
853 | |
854 | if (get_user(val, (int __user *)argp)) |
855 | return -EFAULT; |
856 | control->prefer_rawmidi_subdevice = val; |
857 | return 0; |
858 | } |
859 | case SNDRV_CTL_IOCTL_RAWMIDI_INFO: |
860 | return snd_rawmidi_info_select_user(card, argp); |
861 | } |
862 | return -ENOIOCTLCMD; |
863 | } |
864 | |
865 | /** |
866 | * snd_rawmidi_receive - receive the input data from the device |
867 | * @substream: the rawmidi substream |
868 | * @buffer: the buffer pointer |
869 | * @count: the data size to read |
870 | * |
871 | * Reads the data from the internal buffer. |
872 | * |
873 | * Returns the size of read data, or a negative error code on failure. |
874 | */ |
875 | int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, |
876 | const unsigned char *buffer, int count) |
877 | { |
878 | unsigned long flags; |
879 | int result = 0, count1; |
880 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
881 | |
882 | if (!substream->opened) |
883 | return -EBADFD; |
884 | if (runtime->buffer == NULL) { |
885 | snd_printd("snd_rawmidi_receive: input is not active!!!\n"); |
886 | return -EINVAL; |
887 | } |
888 | spin_lock_irqsave(&runtime->lock, flags); |
889 | if (count == 1) { /* special case, faster code */ |
890 | substream->bytes++; |
891 | if (runtime->avail < runtime->buffer_size) { |
892 | runtime->buffer[runtime->hw_ptr++] = buffer[0]; |
893 | runtime->hw_ptr %= runtime->buffer_size; |
894 | runtime->avail++; |
895 | result++; |
896 | } else { |
897 | runtime->xruns++; |
898 | } |
899 | } else { |
900 | substream->bytes += count; |
901 | count1 = runtime->buffer_size - runtime->hw_ptr; |
902 | if (count1 > count) |
903 | count1 = count; |
904 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) |
905 | count1 = runtime->buffer_size - runtime->avail; |
906 | memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1); |
907 | runtime->hw_ptr += count1; |
908 | runtime->hw_ptr %= runtime->buffer_size; |
909 | runtime->avail += count1; |
910 | count -= count1; |
911 | result += count1; |
912 | if (count > 0) { |
913 | buffer += count1; |
914 | count1 = count; |
915 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) { |
916 | count1 = runtime->buffer_size - runtime->avail; |
917 | runtime->xruns += count - count1; |
918 | } |
919 | if (count1 > 0) { |
920 | memcpy(runtime->buffer, buffer, count1); |
921 | runtime->hw_ptr = count1; |
922 | runtime->avail += count1; |
923 | result += count1; |
924 | } |
925 | } |
926 | } |
927 | if (result > 0) { |
928 | if (runtime->event) |
929 | tasklet_schedule(&runtime->tasklet); |
930 | else if (snd_rawmidi_ready(substream)) |
931 | wake_up(&runtime->sleep); |
932 | } |
933 | spin_unlock_irqrestore(&runtime->lock, flags); |
934 | return result; |
935 | } |
936 | |
937 | static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream, |
938 | unsigned char __user *userbuf, |
939 | unsigned char *kernelbuf, long count) |
940 | { |
941 | unsigned long flags; |
942 | long result = 0, count1; |
943 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
944 | |
945 | while (count > 0 && runtime->avail) { |
946 | count1 = runtime->buffer_size - runtime->appl_ptr; |
947 | if (count1 > count) |
948 | count1 = count; |
949 | spin_lock_irqsave(&runtime->lock, flags); |
950 | if (count1 > (int)runtime->avail) |
951 | count1 = runtime->avail; |
952 | if (kernelbuf) |
953 | memcpy(kernelbuf + result, runtime->buffer + runtime->appl_ptr, count1); |
954 | if (userbuf) { |
955 | spin_unlock_irqrestore(&runtime->lock, flags); |
956 | if (copy_to_user(userbuf + result, |
957 | runtime->buffer + runtime->appl_ptr, count1)) { |
958 | return result > 0 ? result : -EFAULT; |
959 | } |
960 | spin_lock_irqsave(&runtime->lock, flags); |
961 | } |
962 | runtime->appl_ptr += count1; |
963 | runtime->appl_ptr %= runtime->buffer_size; |
964 | runtime->avail -= count1; |
965 | spin_unlock_irqrestore(&runtime->lock, flags); |
966 | result += count1; |
967 | count -= count1; |
968 | } |
969 | return result; |
970 | } |
971 | |
972 | long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, |
973 | unsigned char *buf, long count) |
974 | { |
975 | snd_rawmidi_input_trigger(substream, 1); |
976 | return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count); |
977 | } |
978 | |
979 | static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, |
980 | loff_t *offset) |
981 | { |
982 | long result; |
983 | int count1; |
984 | struct snd_rawmidi_file *rfile; |
985 | struct snd_rawmidi_substream *substream; |
986 | struct snd_rawmidi_runtime *runtime; |
987 | |
988 | rfile = file->private_data; |
989 | substream = rfile->input; |
990 | if (substream == NULL) |
991 | return -EIO; |
992 | runtime = substream->runtime; |
993 | snd_rawmidi_input_trigger(substream, 1); |
994 | result = 0; |
995 | while (count > 0) { |
996 | spin_lock_irq(&runtime->lock); |
997 | while (!snd_rawmidi_ready(substream)) { |
998 | wait_queue_t wait; |
999 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { |
1000 | spin_unlock_irq(&runtime->lock); |
1001 | return result > 0 ? result : -EAGAIN; |
1002 | } |
1003 | init_waitqueue_entry(&wait, current); |
1004 | add_wait_queue(&runtime->sleep, &wait); |
1005 | set_current_state(TASK_INTERRUPTIBLE); |
1006 | spin_unlock_irq(&runtime->lock); |
1007 | schedule(); |
1008 | remove_wait_queue(&runtime->sleep, &wait); |
1009 | if (signal_pending(current)) |
1010 | return result > 0 ? result : -ERESTARTSYS; |
1011 | if (!runtime->avail) |
1012 | return result > 0 ? result : -EIO; |
1013 | spin_lock_irq(&runtime->lock); |
1014 | } |
1015 | spin_unlock_irq(&runtime->lock); |
1016 | count1 = snd_rawmidi_kernel_read1(substream, |
1017 | (unsigned char __user *)buf, |
1018 | NULL/*kernelbuf*/, |
1019 | count); |
1020 | if (count1 < 0) |
1021 | return result > 0 ? result : count1; |
1022 | result += count1; |
1023 | buf += count1; |
1024 | count -= count1; |
1025 | } |
1026 | return result; |
1027 | } |
1028 | |
1029 | /** |
1030 | * snd_rawmidi_transmit_empty - check whether the output buffer is empty |
1031 | * @substream: the rawmidi substream |
1032 | * |
1033 | * Returns 1 if the internal output buffer is empty, 0 if not. |
1034 | */ |
1035 | int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream) |
1036 | { |
1037 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1038 | int result; |
1039 | unsigned long flags; |
1040 | |
1041 | if (runtime->buffer == NULL) { |
1042 | snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n"); |
1043 | return 1; |
1044 | } |
1045 | spin_lock_irqsave(&runtime->lock, flags); |
1046 | result = runtime->avail >= runtime->buffer_size; |
1047 | spin_unlock_irqrestore(&runtime->lock, flags); |
1048 | return result; |
1049 | } |
1050 | |
1051 | /** |
1052 | * snd_rawmidi_transmit_peek - copy data from the internal buffer |
1053 | * @substream: the rawmidi substream |
1054 | * @buffer: the buffer pointer |
1055 | * @count: data size to transfer |
1056 | * |
1057 | * Copies data from the internal output buffer to the given buffer. |
1058 | * |
1059 | * Call this in the interrupt handler when the midi output is ready, |
1060 | * and call snd_rawmidi_transmit_ack() after the transmission is |
1061 | * finished. |
1062 | * |
1063 | * Returns the size of copied data, or a negative error code on failure. |
1064 | */ |
1065 | int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, |
1066 | unsigned char *buffer, int count) |
1067 | { |
1068 | unsigned long flags; |
1069 | int result, count1; |
1070 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1071 | |
1072 | if (runtime->buffer == NULL) { |
1073 | snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n"); |
1074 | return -EINVAL; |
1075 | } |
1076 | result = 0; |
1077 | spin_lock_irqsave(&runtime->lock, flags); |
1078 | if (runtime->avail >= runtime->buffer_size) { |
1079 | /* warning: lowlevel layer MUST trigger down the hardware */ |
1080 | goto __skip; |
1081 | } |
1082 | if (count == 1) { /* special case, faster code */ |
1083 | *buffer = runtime->buffer[runtime->hw_ptr]; |
1084 | result++; |
1085 | } else { |
1086 | count1 = runtime->buffer_size - runtime->hw_ptr; |
1087 | if (count1 > count) |
1088 | count1 = count; |
1089 | if (count1 > (int)(runtime->buffer_size - runtime->avail)) |
1090 | count1 = runtime->buffer_size - runtime->avail; |
1091 | memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1); |
1092 | count -= count1; |
1093 | result += count1; |
1094 | if (count > 0) { |
1095 | if (count > (int)(runtime->buffer_size - runtime->avail - count1)) |
1096 | count = runtime->buffer_size - runtime->avail - count1; |
1097 | memcpy(buffer + count1, runtime->buffer, count); |
1098 | result += count; |
1099 | } |
1100 | } |
1101 | __skip: |
1102 | spin_unlock_irqrestore(&runtime->lock, flags); |
1103 | return result; |
1104 | } |
1105 | |
1106 | /** |
1107 | * snd_rawmidi_transmit_ack - acknowledge the transmission |
1108 | * @substream: the rawmidi substream |
1109 | * @count: the tranferred count |
1110 | * |
1111 | * Advances the hardware pointer for the internal output buffer with |
1112 | * the given size and updates the condition. |
1113 | * Call after the transmission is finished. |
1114 | * |
1115 | * Returns the advanced size if successful, or a negative error code on failure. |
1116 | */ |
1117 | int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) |
1118 | { |
1119 | unsigned long flags; |
1120 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1121 | |
1122 | if (runtime->buffer == NULL) { |
1123 | snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n"); |
1124 | return -EINVAL; |
1125 | } |
1126 | spin_lock_irqsave(&runtime->lock, flags); |
1127 | snd_BUG_ON(runtime->avail + count > runtime->buffer_size); |
1128 | runtime->hw_ptr += count; |
1129 | runtime->hw_ptr %= runtime->buffer_size; |
1130 | runtime->avail += count; |
1131 | substream->bytes += count; |
1132 | if (count > 0) { |
1133 | if (runtime->drain || snd_rawmidi_ready(substream)) |
1134 | wake_up(&runtime->sleep); |
1135 | } |
1136 | spin_unlock_irqrestore(&runtime->lock, flags); |
1137 | return count; |
1138 | } |
1139 | |
1140 | /** |
1141 | * snd_rawmidi_transmit - copy from the buffer to the device |
1142 | * @substream: the rawmidi substream |
1143 | * @buffer: the buffer pointer |
1144 | * @count: the data size to transfer |
1145 | * |
1146 | * Copies data from the buffer to the device and advances the pointer. |
1147 | * |
1148 | * Returns the copied size if successful, or a negative error code on failure. |
1149 | */ |
1150 | int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, |
1151 | unsigned char *buffer, int count) |
1152 | { |
1153 | if (!substream->opened) |
1154 | return -EBADFD; |
1155 | count = snd_rawmidi_transmit_peek(substream, buffer, count); |
1156 | if (count < 0) |
1157 | return count; |
1158 | return snd_rawmidi_transmit_ack(substream, count); |
1159 | } |
1160 | |
1161 | static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, |
1162 | const unsigned char __user *userbuf, |
1163 | const unsigned char *kernelbuf, |
1164 | long count) |
1165 | { |
1166 | unsigned long flags; |
1167 | long count1, result; |
1168 | struct snd_rawmidi_runtime *runtime = substream->runtime; |
1169 | |
1170 | if (snd_BUG_ON(!kernelbuf && !userbuf)) |
1171 | return -EINVAL; |
1172 | if (snd_BUG_ON(!runtime->buffer)) |
1173 | return -EINVAL; |
1174 | |
1175 | result = 0; |
1176 | spin_lock_irqsave(&runtime->lock, flags); |
1177 | if (substream->append) { |
1178 | if ((long)runtime->avail < count) { |
1179 | spin_unlock_irqrestore(&runtime->lock, flags); |
1180 | return -EAGAIN; |
1181 | } |
1182 | } |
1183 | while (count > 0 && runtime->avail > 0) { |
1184 | count1 = runtime->buffer_size - runtime->appl_ptr; |
1185 | if (count1 > count) |
1186 | count1 = count; |
1187 | if (count1 > (long)runtime->avail) |
1188 | count1 = runtime->avail; |
1189 | if (kernelbuf) |
1190 | memcpy(runtime->buffer + runtime->appl_ptr, |
1191 | kernelbuf + result, count1); |
1192 | else if (userbuf) { |
1193 | spin_unlock_irqrestore(&runtime->lock, flags); |
1194 | if (copy_from_user(runtime->buffer + runtime->appl_ptr, |
1195 | userbuf + result, count1)) { |
1196 | spin_lock_irqsave(&runtime->lock, flags); |
1197 | result = result > 0 ? result : -EFAULT; |
1198 | goto __end; |
1199 | } |
1200 | spin_lock_irqsave(&runtime->lock, flags); |
1201 | } |
1202 | runtime->appl_ptr += count1; |
1203 | runtime->appl_ptr %= runtime->buffer_size; |
1204 | runtime->avail -= count1; |
1205 | result += count1; |
1206 | count -= count1; |
1207 | } |
1208 | __end: |
1209 | count1 = runtime->avail < runtime->buffer_size; |
1210 | spin_unlock_irqrestore(&runtime->lock, flags); |
1211 | if (count1) |
1212 | snd_rawmidi_output_trigger(substream, 1); |
1213 | return result; |
1214 | } |
1215 | |
1216 | long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, |
1217 | const unsigned char *buf, long count) |
1218 | { |
1219 | return snd_rawmidi_kernel_write1(substream, NULL, buf, count); |
1220 | } |
1221 | |
1222 | static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, |
1223 | size_t count, loff_t *offset) |
1224 | { |
1225 | long result, timeout; |
1226 | int count1; |
1227 | struct snd_rawmidi_file *rfile; |
1228 | struct snd_rawmidi_runtime *runtime; |
1229 | struct snd_rawmidi_substream *substream; |
1230 | |
1231 | rfile = file->private_data; |
1232 | substream = rfile->output; |
1233 | runtime = substream->runtime; |
1234 | /* we cannot put an atomic message to our buffer */ |
1235 | if (substream->append && count > runtime->buffer_size) |
1236 | return -EIO; |
1237 | result = 0; |
1238 | while (count > 0) { |
1239 | spin_lock_irq(&runtime->lock); |
1240 | while (!snd_rawmidi_ready_append(substream, count)) { |
1241 | wait_queue_t wait; |
1242 | if (file->f_flags & O_NONBLOCK) { |
1243 | spin_unlock_irq(&runtime->lock); |
1244 | return result > 0 ? result : -EAGAIN; |
1245 | } |
1246 | init_waitqueue_entry(&wait, current); |
1247 | add_wait_queue(&runtime->sleep, &wait); |
1248 | set_current_state(TASK_INTERRUPTIBLE); |
1249 | spin_unlock_irq(&runtime->lock); |
1250 | timeout = schedule_timeout(30 * HZ); |
1251 | remove_wait_queue(&runtime->sleep, &wait); |
1252 | if (signal_pending(current)) |
1253 | return result > 0 ? result : -ERESTARTSYS; |
1254 | if (!runtime->avail && !timeout) |
1255 | return result > 0 ? result : -EIO; |
1256 | spin_lock_irq(&runtime->lock); |
1257 | } |
1258 | spin_unlock_irq(&runtime->lock); |
1259 | count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count); |
1260 | if (count1 < 0) |
1261 | return result > 0 ? result : count1; |
1262 | result += count1; |
1263 | buf += count1; |
1264 | if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK)) |
1265 | break; |
1266 | count -= count1; |
1267 | } |
1268 | if (file->f_flags & O_DSYNC) { |
1269 | spin_lock_irq(&runtime->lock); |
1270 | while (runtime->avail != runtime->buffer_size) { |
1271 | wait_queue_t wait; |
1272 | unsigned int last_avail = runtime->avail; |
1273 | init_waitqueue_entry(&wait, current); |
1274 | add_wait_queue(&runtime->sleep, &wait); |
1275 | set_current_state(TASK_INTERRUPTIBLE); |
1276 | spin_unlock_irq(&runtime->lock); |
1277 | timeout = schedule_timeout(30 * HZ); |
1278 | remove_wait_queue(&runtime->sleep, &wait); |
1279 | if (signal_pending(current)) |
1280 | return result > 0 ? result : -ERESTARTSYS; |
1281 | if (runtime->avail == last_avail && !timeout) |
1282 | return result > 0 ? result : -EIO; |
1283 | spin_lock_irq(&runtime->lock); |
1284 | } |
1285 | spin_unlock_irq(&runtime->lock); |
1286 | } |
1287 | return result; |
1288 | } |
1289 | |
1290 | static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait) |
1291 | { |
1292 | struct snd_rawmidi_file *rfile; |
1293 | struct snd_rawmidi_runtime *runtime; |
1294 | unsigned int mask; |
1295 | |
1296 | rfile = file->private_data; |
1297 | if (rfile->input != NULL) { |
1298 | runtime = rfile->input->runtime; |
1299 | snd_rawmidi_input_trigger(rfile->input, 1); |
1300 | poll_wait(file, &runtime->sleep, wait); |
1301 | } |
1302 | if (rfile->output != NULL) { |
1303 | runtime = rfile->output->runtime; |
1304 | poll_wait(file, &runtime->sleep, wait); |
1305 | } |
1306 | mask = 0; |
1307 | if (rfile->input != NULL) { |
1308 | if (snd_rawmidi_ready(rfile->input)) |
1309 | mask |= POLLIN | POLLRDNORM; |
1310 | } |
1311 | if (rfile->output != NULL) { |
1312 | if (snd_rawmidi_ready(rfile->output)) |
1313 | mask |= POLLOUT | POLLWRNORM; |
1314 | } |
1315 | return mask; |
1316 | } |
1317 | |
1318 | /* |
1319 | */ |
1320 | #ifdef CONFIG_COMPAT |
1321 | #include "rawmidi_compat.c" |
1322 | #else |
1323 | #define snd_rawmidi_ioctl_compat NULL |
1324 | #endif |
1325 | |
1326 | /* |
1327 | |
1328 | */ |
1329 | |
1330 | static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, |
1331 | struct snd_info_buffer *buffer) |
1332 | { |
1333 | struct snd_rawmidi *rmidi; |
1334 | struct snd_rawmidi_substream *substream; |
1335 | struct snd_rawmidi_runtime *runtime; |
1336 | |
1337 | rmidi = entry->private_data; |
1338 | snd_iprintf(buffer, "%s\n\n", rmidi->name); |
1339 | mutex_lock(&rmidi->open_mutex); |
1340 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) { |
1341 | list_for_each_entry(substream, |
1342 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, |
1343 | list) { |
1344 | snd_iprintf(buffer, |
1345 | "Output %d\n" |
1346 | " Tx bytes : %lu\n", |
1347 | substream->number, |
1348 | (unsigned long) substream->bytes); |
1349 | if (substream->opened) { |
1350 | snd_iprintf(buffer, |
1351 | " Owner PID : %d\n", |
1352 | pid_vnr(substream->pid)); |
1353 | runtime = substream->runtime; |
1354 | snd_iprintf(buffer, |
1355 | " Mode : %s\n" |
1356 | " Buffer size : %lu\n" |
1357 | " Avail : %lu\n", |
1358 | runtime->oss ? "OSS compatible" : "native", |
1359 | (unsigned long) runtime->buffer_size, |
1360 | (unsigned long) runtime->avail); |
1361 | } |
1362 | } |
1363 | } |
1364 | if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) { |
1365 | list_for_each_entry(substream, |
1366 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams, |
1367 | list) { |
1368 | snd_iprintf(buffer, |
1369 | "Input %d\n" |
1370 | " Rx bytes : %lu\n", |
1371 | substream->number, |
1372 | (unsigned long) substream->bytes); |
1373 | if (substream->opened) { |
1374 | snd_iprintf(buffer, |
1375 | " Owner PID : %d\n", |
1376 | pid_vnr(substream->pid)); |
1377 | runtime = substream->runtime; |
1378 | snd_iprintf(buffer, |
1379 | " Buffer size : %lu\n" |
1380 | " Avail : %lu\n" |
1381 | " Overruns : %lu\n", |
1382 | (unsigned long) runtime->buffer_size, |
1383 | (unsigned long) runtime->avail, |
1384 | (unsigned long) runtime->xruns); |
1385 | } |
1386 | } |
1387 | } |
1388 | mutex_unlock(&rmidi->open_mutex); |
1389 | } |
1390 | |
1391 | /* |
1392 | * Register functions |
1393 | */ |
1394 | |
1395 | static const struct file_operations snd_rawmidi_f_ops = |
1396 | { |
1397 | .owner = THIS_MODULE, |
1398 | .read = snd_rawmidi_read, |
1399 | .write = snd_rawmidi_write, |
1400 | .open = snd_rawmidi_open, |
1401 | .release = snd_rawmidi_release, |
1402 | .llseek = no_llseek, |
1403 | .poll = snd_rawmidi_poll, |
1404 | .unlocked_ioctl = snd_rawmidi_ioctl, |
1405 | .compat_ioctl = snd_rawmidi_ioctl_compat, |
1406 | }; |
1407 | |
1408 | static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi, |
1409 | struct snd_rawmidi_str *stream, |
1410 | int direction, |
1411 | int count) |
1412 | { |
1413 | struct snd_rawmidi_substream *substream; |
1414 | int idx; |
1415 | |
1416 | for (idx = 0; idx < count; idx++) { |
1417 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
1418 | if (substream == NULL) { |
1419 | snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n"); |
1420 | return -ENOMEM; |
1421 | } |
1422 | substream->stream = direction; |
1423 | substream->number = idx; |
1424 | substream->rmidi = rmidi; |
1425 | substream->pstr = stream; |
1426 | list_add_tail(&substream->list, &stream->substreams); |
1427 | stream->substream_count++; |
1428 | } |
1429 | return 0; |
1430 | } |
1431 | |
1432 | /** |
1433 | * snd_rawmidi_new - create a rawmidi instance |
1434 | * @card: the card instance |
1435 | * @id: the id string |
1436 | * @device: the device index |
1437 | * @output_count: the number of output streams |
1438 | * @input_count: the number of input streams |
1439 | * @rrawmidi: the pointer to store the new rawmidi instance |
1440 | * |
1441 | * Creates a new rawmidi instance. |
1442 | * Use snd_rawmidi_set_ops() to set the operators to the new instance. |
1443 | * |
1444 | * Returns zero if successful, or a negative error code on failure. |
1445 | */ |
1446 | int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
1447 | int output_count, int input_count, |
1448 | struct snd_rawmidi ** rrawmidi) |
1449 | { |
1450 | struct snd_rawmidi *rmidi; |
1451 | int err; |
1452 | static struct snd_device_ops ops = { |
1453 | .dev_free = snd_rawmidi_dev_free, |
1454 | .dev_register = snd_rawmidi_dev_register, |
1455 | .dev_disconnect = snd_rawmidi_dev_disconnect, |
1456 | }; |
1457 | |
1458 | if (snd_BUG_ON(!card)) |
1459 | return -ENXIO; |
1460 | if (rrawmidi) |
1461 | *rrawmidi = NULL; |
1462 | rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL); |
1463 | if (rmidi == NULL) { |
1464 | snd_printk(KERN_ERR "rawmidi: cannot allocate\n"); |
1465 | return -ENOMEM; |
1466 | } |
1467 | rmidi->card = card; |
1468 | rmidi->device = device; |
1469 | mutex_init(&rmidi->open_mutex); |
1470 | init_waitqueue_head(&rmidi->open_wait); |
1471 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams); |
1472 | INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams); |
1473 | |
1474 | if (id != NULL) |
1475 | strlcpy(rmidi->id, id, sizeof(rmidi->id)); |
1476 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1477 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], |
1478 | SNDRV_RAWMIDI_STREAM_INPUT, |
1479 | input_count)) < 0) { |
1480 | snd_rawmidi_free(rmidi); |
1481 | return err; |
1482 | } |
1483 | if ((err = snd_rawmidi_alloc_substreams(rmidi, |
1484 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], |
1485 | SNDRV_RAWMIDI_STREAM_OUTPUT, |
1486 | output_count)) < 0) { |
1487 | snd_rawmidi_free(rmidi); |
1488 | return err; |
1489 | } |
1490 | if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) { |
1491 | snd_rawmidi_free(rmidi); |
1492 | return err; |
1493 | } |
1494 | if (rrawmidi) |
1495 | *rrawmidi = rmidi; |
1496 | return 0; |
1497 | } |
1498 | |
1499 | static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream) |
1500 | { |
1501 | struct snd_rawmidi_substream *substream; |
1502 | |
1503 | while (!list_empty(&stream->substreams)) { |
1504 | substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list); |
1505 | list_del(&substream->list); |
1506 | kfree(substream); |
1507 | } |
1508 | } |
1509 | |
1510 | static int snd_rawmidi_free(struct snd_rawmidi *rmidi) |
1511 | { |
1512 | if (!rmidi) |
1513 | return 0; |
1514 | |
1515 | snd_info_free_entry(rmidi->proc_entry); |
1516 | rmidi->proc_entry = NULL; |
1517 | mutex_lock(®ister_mutex); |
1518 | if (rmidi->ops && rmidi->ops->dev_unregister) |
1519 | rmidi->ops->dev_unregister(rmidi); |
1520 | mutex_unlock(®ister_mutex); |
1521 | |
1522 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); |
1523 | snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); |
1524 | if (rmidi->private_free) |
1525 | rmidi->private_free(rmidi); |
1526 | kfree(rmidi); |
1527 | return 0; |
1528 | } |
1529 | |
1530 | static int snd_rawmidi_dev_free(struct snd_device *device) |
1531 | { |
1532 | struct snd_rawmidi *rmidi = device->device_data; |
1533 | return snd_rawmidi_free(rmidi); |
1534 | } |
1535 | |
1536 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) |
1537 | static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device) |
1538 | { |
1539 | struct snd_rawmidi *rmidi = device->private_data; |
1540 | rmidi->seq_dev = NULL; |
1541 | } |
1542 | #endif |
1543 | |
1544 | static int snd_rawmidi_dev_register(struct snd_device *device) |
1545 | { |
1546 | int err; |
1547 | struct snd_info_entry *entry; |
1548 | char name[16]; |
1549 | struct snd_rawmidi *rmidi = device->device_data; |
1550 | |
1551 | if (rmidi->device >= SNDRV_RAWMIDI_DEVICES) |
1552 | return -ENOMEM; |
1553 | mutex_lock(®ister_mutex); |
1554 | if (snd_rawmidi_search(rmidi->card, rmidi->device)) { |
1555 | mutex_unlock(®ister_mutex); |
1556 | return -EBUSY; |
1557 | } |
1558 | list_add_tail(&rmidi->list, &snd_rawmidi_devices); |
1559 | sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device); |
1560 | if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI, |
1561 | rmidi->card, rmidi->device, |
1562 | &snd_rawmidi_f_ops, rmidi, name)) < 0) { |
1563 | snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device); |
1564 | list_del(&rmidi->list); |
1565 | mutex_unlock(®ister_mutex); |
1566 | return err; |
1567 | } |
1568 | if (rmidi->ops && rmidi->ops->dev_register && |
1569 | (err = rmidi->ops->dev_register(rmidi)) < 0) { |
1570 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); |
1571 | list_del(&rmidi->list); |
1572 | mutex_unlock(®ister_mutex); |
1573 | return err; |
1574 | } |
1575 | #ifdef CONFIG_SND_OSSEMUL |
1576 | rmidi->ossreg = 0; |
1577 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { |
1578 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, |
1579 | rmidi->card, 0, &snd_rawmidi_f_ops, |
1580 | rmidi, name) < 0) { |
1581 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0); |
1582 | } else { |
1583 | rmidi->ossreg++; |
1584 | #ifdef SNDRV_OSS_INFO_DEV_MIDI |
1585 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name); |
1586 | #endif |
1587 | } |
1588 | } |
1589 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) { |
1590 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, |
1591 | rmidi->card, 1, &snd_rawmidi_f_ops, |
1592 | rmidi, name) < 0) { |
1593 | snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1); |
1594 | } else { |
1595 | rmidi->ossreg++; |
1596 | } |
1597 | } |
1598 | #endif /* CONFIG_SND_OSSEMUL */ |
1599 | mutex_unlock(®ister_mutex); |
1600 | sprintf(name, "midi%d", rmidi->device); |
1601 | entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root); |
1602 | if (entry) { |
1603 | entry->private_data = rmidi; |
1604 | entry->c.text.read = snd_rawmidi_proc_info_read; |
1605 | if (snd_info_register(entry) < 0) { |
1606 | snd_info_free_entry(entry); |
1607 | entry = NULL; |
1608 | } |
1609 | } |
1610 | rmidi->proc_entry = entry; |
1611 | #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) |
1612 | if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */ |
1613 | if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) { |
1614 | rmidi->seq_dev->private_data = rmidi; |
1615 | rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free; |
1616 | sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device); |
1617 | snd_device_register(rmidi->card, rmidi->seq_dev); |
1618 | } |
1619 | } |
1620 | #endif |
1621 | return 0; |
1622 | } |
1623 | |
1624 | static int snd_rawmidi_dev_disconnect(struct snd_device *device) |
1625 | { |
1626 | struct snd_rawmidi *rmidi = device->device_data; |
1627 | |
1628 | mutex_lock(®ister_mutex); |
1629 | list_del_init(&rmidi->list); |
1630 | #ifdef CONFIG_SND_OSSEMUL |
1631 | if (rmidi->ossreg) { |
1632 | if ((int)rmidi->device == midi_map[rmidi->card->number]) { |
1633 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0); |
1634 | #ifdef SNDRV_OSS_INFO_DEV_MIDI |
1635 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number); |
1636 | #endif |
1637 | } |
1638 | if ((int)rmidi->device == amidi_map[rmidi->card->number]) |
1639 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1); |
1640 | rmidi->ossreg = 0; |
1641 | } |
1642 | #endif /* CONFIG_SND_OSSEMUL */ |
1643 | snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); |
1644 | mutex_unlock(®ister_mutex); |
1645 | return 0; |
1646 | } |
1647 | |
1648 | /** |
1649 | * snd_rawmidi_set_ops - set the rawmidi operators |
1650 | * @rmidi: the rawmidi instance |
1651 | * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX |
1652 | * @ops: the operator table |
1653 | * |
1654 | * Sets the rawmidi operators for the given stream direction. |
1655 | */ |
1656 | void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, |
1657 | struct snd_rawmidi_ops *ops) |
1658 | { |
1659 | struct snd_rawmidi_substream *substream; |
1660 | |
1661 | list_for_each_entry(substream, &rmidi->streams[stream].substreams, list) |
1662 | substream->ops = ops; |
1663 | } |
1664 | |
1665 | /* |
1666 | * ENTRY functions |
1667 | */ |
1668 | |
1669 | static int __init alsa_rawmidi_init(void) |
1670 | { |
1671 | |
1672 | snd_ctl_register_ioctl(snd_rawmidi_control_ioctl); |
1673 | snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl); |
1674 | #ifdef CONFIG_SND_OSSEMUL |
1675 | { int i; |
1676 | /* check device map table */ |
1677 | for (i = 0; i < SNDRV_CARDS; i++) { |
1678 | if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) { |
1679 | snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]); |
1680 | midi_map[i] = 0; |
1681 | } |
1682 | if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) { |
1683 | snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]); |
1684 | amidi_map[i] = 1; |
1685 | } |
1686 | } |
1687 | } |
1688 | #endif /* CONFIG_SND_OSSEMUL */ |
1689 | return 0; |
1690 | } |
1691 | |
1692 | static void __exit alsa_rawmidi_exit(void) |
1693 | { |
1694 | snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl); |
1695 | snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl); |
1696 | } |
1697 | |
1698 | module_init(alsa_rawmidi_init) |
1699 | module_exit(alsa_rawmidi_exit) |
1700 | |
1701 | EXPORT_SYMBOL(snd_rawmidi_output_params); |
1702 | EXPORT_SYMBOL(snd_rawmidi_input_params); |
1703 | EXPORT_SYMBOL(snd_rawmidi_drop_output); |
1704 | EXPORT_SYMBOL(snd_rawmidi_drain_output); |
1705 | EXPORT_SYMBOL(snd_rawmidi_drain_input); |
1706 | EXPORT_SYMBOL(snd_rawmidi_receive); |
1707 | EXPORT_SYMBOL(snd_rawmidi_transmit_empty); |
1708 | EXPORT_SYMBOL(snd_rawmidi_transmit_peek); |
1709 | EXPORT_SYMBOL(snd_rawmidi_transmit_ack); |
1710 | EXPORT_SYMBOL(snd_rawmidi_transmit); |
1711 | EXPORT_SYMBOL(snd_rawmidi_new); |
1712 | EXPORT_SYMBOL(snd_rawmidi_set_ops); |
1713 | EXPORT_SYMBOL(snd_rawmidi_info_select); |
1714 | EXPORT_SYMBOL(snd_rawmidi_kernel_open); |
1715 | EXPORT_SYMBOL(snd_rawmidi_kernel_release); |
1716 | EXPORT_SYMBOL(snd_rawmidi_kernel_read); |
1717 | EXPORT_SYMBOL(snd_rawmidi_kernel_write); |
1718 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
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jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9