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1 | /* |
2 | * Digital Audio (PCM) abstract layer |
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 <linux/init.h> |
23 | #include <linux/slab.h> |
24 | #include <linux/time.h> |
25 | #include <linux/mutex.h> |
26 | #include <sound/core.h> |
27 | #include <sound/minors.h> |
28 | #include <sound/pcm.h> |
29 | #include <sound/control.h> |
30 | #include <sound/info.h> |
31 | |
32 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); |
33 | MODULE_DESCRIPTION("Midlevel PCM code for ALSA."); |
34 | MODULE_LICENSE("GPL"); |
35 | |
36 | static LIST_HEAD(snd_pcm_devices); |
37 | static LIST_HEAD(snd_pcm_notify_list); |
38 | static DEFINE_MUTEX(register_mutex); |
39 | |
40 | static int snd_pcm_free(struct snd_pcm *pcm); |
41 | static int snd_pcm_dev_free(struct snd_device *device); |
42 | static int snd_pcm_dev_register(struct snd_device *device); |
43 | static int snd_pcm_dev_disconnect(struct snd_device *device); |
44 | |
45 | static struct snd_pcm *snd_pcm_get(struct snd_card *card, int device) |
46 | { |
47 | struct snd_pcm *pcm; |
48 | |
49 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
50 | if (pcm->card == card && pcm->device == device) |
51 | return pcm; |
52 | } |
53 | return NULL; |
54 | } |
55 | |
56 | static int snd_pcm_next(struct snd_card *card, int device) |
57 | { |
58 | struct snd_pcm *pcm; |
59 | |
60 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
61 | if (pcm->card == card && pcm->device > device) |
62 | return pcm->device; |
63 | else if (pcm->card->number > card->number) |
64 | return -1; |
65 | } |
66 | return -1; |
67 | } |
68 | |
69 | static int snd_pcm_add(struct snd_pcm *newpcm) |
70 | { |
71 | struct snd_pcm *pcm; |
72 | |
73 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
74 | if (pcm->card == newpcm->card && pcm->device == newpcm->device) |
75 | return -EBUSY; |
76 | if (pcm->card->number > newpcm->card->number || |
77 | (pcm->card == newpcm->card && |
78 | pcm->device > newpcm->device)) { |
79 | list_add(&newpcm->list, pcm->list.prev); |
80 | return 0; |
81 | } |
82 | } |
83 | list_add_tail(&newpcm->list, &snd_pcm_devices); |
84 | return 0; |
85 | } |
86 | |
87 | static int snd_pcm_control_ioctl(struct snd_card *card, |
88 | struct snd_ctl_file *control, |
89 | unsigned int cmd, unsigned long arg) |
90 | { |
91 | switch (cmd) { |
92 | case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE: |
93 | { |
94 | int device; |
95 | |
96 | if (get_user(device, (int __user *)arg)) |
97 | return -EFAULT; |
98 | mutex_lock(®ister_mutex); |
99 | device = snd_pcm_next(card, device); |
100 | mutex_unlock(®ister_mutex); |
101 | if (put_user(device, (int __user *)arg)) |
102 | return -EFAULT; |
103 | return 0; |
104 | } |
105 | case SNDRV_CTL_IOCTL_PCM_INFO: |
106 | { |
107 | struct snd_pcm_info __user *info; |
108 | unsigned int device, subdevice; |
109 | int stream; |
110 | struct snd_pcm *pcm; |
111 | struct snd_pcm_str *pstr; |
112 | struct snd_pcm_substream *substream; |
113 | int err; |
114 | |
115 | info = (struct snd_pcm_info __user *)arg; |
116 | if (get_user(device, &info->device)) |
117 | return -EFAULT; |
118 | if (get_user(stream, &info->stream)) |
119 | return -EFAULT; |
120 | if (stream < 0 || stream > 1) |
121 | return -EINVAL; |
122 | if (get_user(subdevice, &info->subdevice)) |
123 | return -EFAULT; |
124 | mutex_lock(®ister_mutex); |
125 | pcm = snd_pcm_get(card, device); |
126 | if (pcm == NULL) { |
127 | err = -ENXIO; |
128 | goto _error; |
129 | } |
130 | pstr = &pcm->streams[stream]; |
131 | if (pstr->substream_count == 0) { |
132 | err = -ENOENT; |
133 | goto _error; |
134 | } |
135 | if (subdevice >= pstr->substream_count) { |
136 | err = -ENXIO; |
137 | goto _error; |
138 | } |
139 | for (substream = pstr->substream; substream; |
140 | substream = substream->next) |
141 | if (substream->number == (int)subdevice) |
142 | break; |
143 | if (substream == NULL) { |
144 | err = -ENXIO; |
145 | goto _error; |
146 | } |
147 | err = snd_pcm_info_user(substream, info); |
148 | _error: |
149 | mutex_unlock(®ister_mutex); |
150 | return err; |
151 | } |
152 | case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE: |
153 | { |
154 | int val; |
155 | |
156 | if (get_user(val, (int __user *)arg)) |
157 | return -EFAULT; |
158 | control->prefer_pcm_subdevice = val; |
159 | return 0; |
160 | } |
161 | } |
162 | return -ENOIOCTLCMD; |
163 | } |
164 | |
165 | #define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v |
166 | |
167 | static char *snd_pcm_format_names[] = { |
168 | FORMAT(S8), |
169 | FORMAT(U8), |
170 | FORMAT(S16_LE), |
171 | FORMAT(S16_BE), |
172 | FORMAT(U16_LE), |
173 | FORMAT(U16_BE), |
174 | FORMAT(S24_LE), |
175 | FORMAT(S24_BE), |
176 | FORMAT(U24_LE), |
177 | FORMAT(U24_BE), |
178 | FORMAT(S32_LE), |
179 | FORMAT(S32_BE), |
180 | FORMAT(U32_LE), |
181 | FORMAT(U32_BE), |
182 | FORMAT(FLOAT_LE), |
183 | FORMAT(FLOAT_BE), |
184 | FORMAT(FLOAT64_LE), |
185 | FORMAT(FLOAT64_BE), |
186 | FORMAT(IEC958_SUBFRAME_LE), |
187 | FORMAT(IEC958_SUBFRAME_BE), |
188 | FORMAT(MU_LAW), |
189 | FORMAT(A_LAW), |
190 | FORMAT(IMA_ADPCM), |
191 | FORMAT(MPEG), |
192 | FORMAT(GSM), |
193 | FORMAT(SPECIAL), |
194 | FORMAT(S24_3LE), |
195 | FORMAT(S24_3BE), |
196 | FORMAT(U24_3LE), |
197 | FORMAT(U24_3BE), |
198 | FORMAT(S20_3LE), |
199 | FORMAT(S20_3BE), |
200 | FORMAT(U20_3LE), |
201 | FORMAT(U20_3BE), |
202 | FORMAT(S18_3LE), |
203 | FORMAT(S18_3BE), |
204 | FORMAT(U18_3LE), |
205 | FORMAT(U18_3BE), |
206 | FORMAT(G723_24), |
207 | FORMAT(G723_24_1B), |
208 | FORMAT(G723_40), |
209 | FORMAT(G723_40_1B), |
210 | }; |
211 | |
212 | const char *snd_pcm_format_name(snd_pcm_format_t format) |
213 | { |
214 | if (format >= ARRAY_SIZE(snd_pcm_format_names)) |
215 | return "Unknown"; |
216 | return snd_pcm_format_names[format]; |
217 | } |
218 | EXPORT_SYMBOL_GPL(snd_pcm_format_name); |
219 | |
220 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
221 | |
222 | #define STATE(v) [SNDRV_PCM_STATE_##v] = #v |
223 | #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v |
224 | #define READY(v) [SNDRV_PCM_READY_##v] = #v |
225 | #define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v |
226 | #define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v |
227 | #define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v |
228 | #define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v |
229 | #define START(v) [SNDRV_PCM_START_##v] = #v |
230 | #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v |
231 | |
232 | static char *snd_pcm_stream_names[] = { |
233 | STREAM(PLAYBACK), |
234 | STREAM(CAPTURE), |
235 | }; |
236 | |
237 | static char *snd_pcm_state_names[] = { |
238 | STATE(OPEN), |
239 | STATE(SETUP), |
240 | STATE(PREPARED), |
241 | STATE(RUNNING), |
242 | STATE(XRUN), |
243 | STATE(DRAINING), |
244 | STATE(PAUSED), |
245 | STATE(SUSPENDED), |
246 | }; |
247 | |
248 | static char *snd_pcm_access_names[] = { |
249 | ACCESS(MMAP_INTERLEAVED), |
250 | ACCESS(MMAP_NONINTERLEAVED), |
251 | ACCESS(MMAP_COMPLEX), |
252 | ACCESS(RW_INTERLEAVED), |
253 | ACCESS(RW_NONINTERLEAVED), |
254 | }; |
255 | |
256 | static char *snd_pcm_subformat_names[] = { |
257 | SUBFORMAT(STD), |
258 | }; |
259 | |
260 | static char *snd_pcm_tstamp_mode_names[] = { |
261 | TSTAMP(NONE), |
262 | TSTAMP(ENABLE), |
263 | }; |
264 | |
265 | static const char *snd_pcm_stream_name(int stream) |
266 | { |
267 | return snd_pcm_stream_names[stream]; |
268 | } |
269 | |
270 | static const char *snd_pcm_access_name(snd_pcm_access_t access) |
271 | { |
272 | return snd_pcm_access_names[access]; |
273 | } |
274 | |
275 | static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat) |
276 | { |
277 | return snd_pcm_subformat_names[subformat]; |
278 | } |
279 | |
280 | static const char *snd_pcm_tstamp_mode_name(int mode) |
281 | { |
282 | return snd_pcm_tstamp_mode_names[mode]; |
283 | } |
284 | |
285 | static const char *snd_pcm_state_name(snd_pcm_state_t state) |
286 | { |
287 | return snd_pcm_state_names[state]; |
288 | } |
289 | |
290 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
291 | #include <linux/soundcard.h> |
292 | |
293 | static const char *snd_pcm_oss_format_name(int format) |
294 | { |
295 | switch (format) { |
296 | case AFMT_MU_LAW: |
297 | return "MU_LAW"; |
298 | case AFMT_A_LAW: |
299 | return "A_LAW"; |
300 | case AFMT_IMA_ADPCM: |
301 | return "IMA_ADPCM"; |
302 | case AFMT_U8: |
303 | return "U8"; |
304 | case AFMT_S16_LE: |
305 | return "S16_LE"; |
306 | case AFMT_S16_BE: |
307 | return "S16_BE"; |
308 | case AFMT_S8: |
309 | return "S8"; |
310 | case AFMT_U16_LE: |
311 | return "U16_LE"; |
312 | case AFMT_U16_BE: |
313 | return "U16_BE"; |
314 | case AFMT_MPEG: |
315 | return "MPEG"; |
316 | default: |
317 | return "unknown"; |
318 | } |
319 | } |
320 | #endif |
321 | |
322 | static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, |
323 | struct snd_info_buffer *buffer) |
324 | { |
325 | struct snd_pcm_info *info; |
326 | int err; |
327 | |
328 | if (! substream) |
329 | return; |
330 | |
331 | info = kmalloc(sizeof(*info), GFP_KERNEL); |
332 | if (! info) { |
333 | printk(KERN_DEBUG "snd_pcm_proc_info_read: cannot malloc\n"); |
334 | return; |
335 | } |
336 | |
337 | err = snd_pcm_info(substream, info); |
338 | if (err < 0) { |
339 | snd_iprintf(buffer, "error %d\n", err); |
340 | kfree(info); |
341 | return; |
342 | } |
343 | snd_iprintf(buffer, "card: %d\n", info->card); |
344 | snd_iprintf(buffer, "device: %d\n", info->device); |
345 | snd_iprintf(buffer, "subdevice: %d\n", info->subdevice); |
346 | snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream)); |
347 | snd_iprintf(buffer, "id: %s\n", info->id); |
348 | snd_iprintf(buffer, "name: %s\n", info->name); |
349 | snd_iprintf(buffer, "subname: %s\n", info->subname); |
350 | snd_iprintf(buffer, "class: %d\n", info->dev_class); |
351 | snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); |
352 | snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); |
353 | snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); |
354 | kfree(info); |
355 | } |
356 | |
357 | static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry, |
358 | struct snd_info_buffer *buffer) |
359 | { |
360 | snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream, |
361 | buffer); |
362 | } |
363 | |
364 | static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry, |
365 | struct snd_info_buffer *buffer) |
366 | { |
367 | snd_pcm_proc_info_read(entry->private_data, buffer); |
368 | } |
369 | |
370 | static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry, |
371 | struct snd_info_buffer *buffer) |
372 | { |
373 | struct snd_pcm_substream *substream = entry->private_data; |
374 | struct snd_pcm_runtime *runtime; |
375 | |
376 | mutex_lock(&substream->pcm->open_mutex); |
377 | runtime = substream->runtime; |
378 | if (!runtime) { |
379 | snd_iprintf(buffer, "closed\n"); |
380 | goto unlock; |
381 | } |
382 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
383 | snd_iprintf(buffer, "no setup\n"); |
384 | goto unlock; |
385 | } |
386 | snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); |
387 | snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); |
388 | snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat)); |
389 | snd_iprintf(buffer, "channels: %u\n", runtime->channels); |
390 | snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den); |
391 | snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size); |
392 | snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size); |
393 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
394 | if (substream->oss.oss) { |
395 | snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format)); |
396 | snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels); |
397 | snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate); |
398 | snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes); |
399 | snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods); |
400 | snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); |
401 | } |
402 | #endif |
403 | unlock: |
404 | mutex_unlock(&substream->pcm->open_mutex); |
405 | } |
406 | |
407 | static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, |
408 | struct snd_info_buffer *buffer) |
409 | { |
410 | struct snd_pcm_substream *substream = entry->private_data; |
411 | struct snd_pcm_runtime *runtime; |
412 | |
413 | mutex_lock(&substream->pcm->open_mutex); |
414 | runtime = substream->runtime; |
415 | if (!runtime) { |
416 | snd_iprintf(buffer, "closed\n"); |
417 | goto unlock; |
418 | } |
419 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
420 | snd_iprintf(buffer, "no setup\n"); |
421 | goto unlock; |
422 | } |
423 | snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); |
424 | snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); |
425 | snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min); |
426 | snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold); |
427 | snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold); |
428 | snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); |
429 | snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); |
430 | snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); |
431 | unlock: |
432 | mutex_unlock(&substream->pcm->open_mutex); |
433 | } |
434 | |
435 | static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, |
436 | struct snd_info_buffer *buffer) |
437 | { |
438 | struct snd_pcm_substream *substream = entry->private_data; |
439 | struct snd_pcm_runtime *runtime; |
440 | struct snd_pcm_status status; |
441 | int err; |
442 | |
443 | mutex_lock(&substream->pcm->open_mutex); |
444 | runtime = substream->runtime; |
445 | if (!runtime) { |
446 | snd_iprintf(buffer, "closed\n"); |
447 | goto unlock; |
448 | } |
449 | memset(&status, 0, sizeof(status)); |
450 | err = snd_pcm_status(substream, &status); |
451 | if (err < 0) { |
452 | snd_iprintf(buffer, "error %d\n", err); |
453 | goto unlock; |
454 | } |
455 | snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); |
456 | snd_iprintf(buffer, "owner_pid : %d\n", pid_vnr(substream->pid)); |
457 | snd_iprintf(buffer, "trigger_time: %ld.%09ld\n", |
458 | status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec); |
459 | snd_iprintf(buffer, "tstamp : %ld.%09ld\n", |
460 | status.tstamp.tv_sec, status.tstamp.tv_nsec); |
461 | snd_iprintf(buffer, "delay : %ld\n", status.delay); |
462 | snd_iprintf(buffer, "avail : %ld\n", status.avail); |
463 | snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max); |
464 | snd_iprintf(buffer, "-----\n"); |
465 | snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); |
466 | snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); |
467 | unlock: |
468 | mutex_unlock(&substream->pcm->open_mutex); |
469 | } |
470 | |
471 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
472 | static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry, |
473 | struct snd_info_buffer *buffer) |
474 | { |
475 | struct snd_pcm_str *pstr = entry->private_data; |
476 | snd_iprintf(buffer, "%d\n", pstr->xrun_debug); |
477 | } |
478 | |
479 | static void snd_pcm_xrun_debug_write(struct snd_info_entry *entry, |
480 | struct snd_info_buffer *buffer) |
481 | { |
482 | struct snd_pcm_str *pstr = entry->private_data; |
483 | char line[64]; |
484 | if (!snd_info_get_line(buffer, line, sizeof(line))) |
485 | pstr->xrun_debug = simple_strtoul(line, NULL, 10); |
486 | } |
487 | #endif |
488 | |
489 | static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) |
490 | { |
491 | struct snd_pcm *pcm = pstr->pcm; |
492 | struct snd_info_entry *entry; |
493 | char name[16]; |
494 | |
495 | sprintf(name, "pcm%i%c", pcm->device, |
496 | pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); |
497 | if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL) |
498 | return -ENOMEM; |
499 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
500 | if (snd_info_register(entry) < 0) { |
501 | snd_info_free_entry(entry); |
502 | return -ENOMEM; |
503 | } |
504 | pstr->proc_root = entry; |
505 | |
506 | if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) { |
507 | snd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read); |
508 | if (snd_info_register(entry) < 0) { |
509 | snd_info_free_entry(entry); |
510 | entry = NULL; |
511 | } |
512 | } |
513 | pstr->proc_info_entry = entry; |
514 | |
515 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
516 | if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug", |
517 | pstr->proc_root)) != NULL) { |
518 | entry->c.text.read = snd_pcm_xrun_debug_read; |
519 | entry->c.text.write = snd_pcm_xrun_debug_write; |
520 | entry->mode |= S_IWUSR; |
521 | entry->private_data = pstr; |
522 | if (snd_info_register(entry) < 0) { |
523 | snd_info_free_entry(entry); |
524 | entry = NULL; |
525 | } |
526 | } |
527 | pstr->proc_xrun_debug_entry = entry; |
528 | #endif |
529 | return 0; |
530 | } |
531 | |
532 | static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) |
533 | { |
534 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
535 | snd_info_free_entry(pstr->proc_xrun_debug_entry); |
536 | pstr->proc_xrun_debug_entry = NULL; |
537 | #endif |
538 | snd_info_free_entry(pstr->proc_info_entry); |
539 | pstr->proc_info_entry = NULL; |
540 | snd_info_free_entry(pstr->proc_root); |
541 | pstr->proc_root = NULL; |
542 | return 0; |
543 | } |
544 | |
545 | static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) |
546 | { |
547 | struct snd_info_entry *entry; |
548 | struct snd_card *card; |
549 | char name[16]; |
550 | |
551 | card = substream->pcm->card; |
552 | |
553 | sprintf(name, "sub%i", substream->number); |
554 | if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL) |
555 | return -ENOMEM; |
556 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
557 | if (snd_info_register(entry) < 0) { |
558 | snd_info_free_entry(entry); |
559 | return -ENOMEM; |
560 | } |
561 | substream->proc_root = entry; |
562 | |
563 | if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) { |
564 | snd_info_set_text_ops(entry, substream, |
565 | snd_pcm_substream_proc_info_read); |
566 | if (snd_info_register(entry) < 0) { |
567 | snd_info_free_entry(entry); |
568 | entry = NULL; |
569 | } |
570 | } |
571 | substream->proc_info_entry = entry; |
572 | |
573 | if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) { |
574 | snd_info_set_text_ops(entry, substream, |
575 | snd_pcm_substream_proc_hw_params_read); |
576 | if (snd_info_register(entry) < 0) { |
577 | snd_info_free_entry(entry); |
578 | entry = NULL; |
579 | } |
580 | } |
581 | substream->proc_hw_params_entry = entry; |
582 | |
583 | if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) { |
584 | snd_info_set_text_ops(entry, substream, |
585 | snd_pcm_substream_proc_sw_params_read); |
586 | if (snd_info_register(entry) < 0) { |
587 | snd_info_free_entry(entry); |
588 | entry = NULL; |
589 | } |
590 | } |
591 | substream->proc_sw_params_entry = entry; |
592 | |
593 | if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) { |
594 | snd_info_set_text_ops(entry, substream, |
595 | snd_pcm_substream_proc_status_read); |
596 | if (snd_info_register(entry) < 0) { |
597 | snd_info_free_entry(entry); |
598 | entry = NULL; |
599 | } |
600 | } |
601 | substream->proc_status_entry = entry; |
602 | |
603 | return 0; |
604 | } |
605 | |
606 | static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) |
607 | { |
608 | snd_info_free_entry(substream->proc_info_entry); |
609 | substream->proc_info_entry = NULL; |
610 | snd_info_free_entry(substream->proc_hw_params_entry); |
611 | substream->proc_hw_params_entry = NULL; |
612 | snd_info_free_entry(substream->proc_sw_params_entry); |
613 | substream->proc_sw_params_entry = NULL; |
614 | snd_info_free_entry(substream->proc_status_entry); |
615 | substream->proc_status_entry = NULL; |
616 | snd_info_free_entry(substream->proc_root); |
617 | substream->proc_root = NULL; |
618 | return 0; |
619 | } |
620 | #else /* !CONFIG_SND_VERBOSE_PROCFS */ |
621 | static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; } |
622 | static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; } |
623 | static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; } |
624 | static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; } |
625 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
626 | |
627 | /** |
628 | * snd_pcm_new_stream - create a new PCM stream |
629 | * @pcm: the pcm instance |
630 | * @stream: the stream direction, SNDRV_PCM_STREAM_XXX |
631 | * @substream_count: the number of substreams |
632 | * |
633 | * Creates a new stream for the pcm. |
634 | * The corresponding stream on the pcm must have been empty before |
635 | * calling this, i.e. zero must be given to the argument of |
636 | * snd_pcm_new(). |
637 | * |
638 | * Returns zero if successful, or a negative error code on failure. |
639 | */ |
640 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count) |
641 | { |
642 | int idx, err; |
643 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
644 | struct snd_pcm_substream *substream, *prev; |
645 | |
646 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
647 | mutex_init(&pstr->oss.setup_mutex); |
648 | #endif |
649 | pstr->stream = stream; |
650 | pstr->pcm = pcm; |
651 | pstr->substream_count = substream_count; |
652 | if (substream_count > 0) { |
653 | err = snd_pcm_stream_proc_init(pstr); |
654 | if (err < 0) { |
655 | snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n"); |
656 | return err; |
657 | } |
658 | } |
659 | prev = NULL; |
660 | for (idx = 0, prev = NULL; idx < substream_count; idx++) { |
661 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
662 | if (substream == NULL) { |
663 | snd_printk(KERN_ERR "Cannot allocate PCM substream\n"); |
664 | return -ENOMEM; |
665 | } |
666 | substream->pcm = pcm; |
667 | substream->pstr = pstr; |
668 | substream->number = idx; |
669 | substream->stream = stream; |
670 | sprintf(substream->name, "subdevice #%i", idx); |
671 | substream->buffer_bytes_max = UINT_MAX; |
672 | if (prev == NULL) |
673 | pstr->substream = substream; |
674 | else |
675 | prev->next = substream; |
676 | err = snd_pcm_substream_proc_init(substream); |
677 | if (err < 0) { |
678 | snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n"); |
679 | if (prev == NULL) |
680 | pstr->substream = NULL; |
681 | else |
682 | prev->next = NULL; |
683 | kfree(substream); |
684 | return err; |
685 | } |
686 | substream->group = &substream->self_group; |
687 | spin_lock_init(&substream->self_group.lock); |
688 | INIT_LIST_HEAD(&substream->self_group.substreams); |
689 | list_add_tail(&substream->link_list, &substream->self_group.substreams); |
690 | atomic_set(&substream->mmap_count, 0); |
691 | prev = substream; |
692 | } |
693 | return 0; |
694 | } |
695 | |
696 | EXPORT_SYMBOL(snd_pcm_new_stream); |
697 | |
698 | /** |
699 | * snd_pcm_new - create a new PCM instance |
700 | * @card: the card instance |
701 | * @id: the id string |
702 | * @device: the device index (zero based) |
703 | * @playback_count: the number of substreams for playback |
704 | * @capture_count: the number of substreams for capture |
705 | * @rpcm: the pointer to store the new pcm instance |
706 | * |
707 | * Creates a new PCM instance. |
708 | * |
709 | * The pcm operators have to be set afterwards to the new instance |
710 | * via snd_pcm_set_ops(). |
711 | * |
712 | * Returns zero if successful, or a negative error code on failure. |
713 | */ |
714 | int snd_pcm_new(struct snd_card *card, const char *id, int device, |
715 | int playback_count, int capture_count, |
716 | struct snd_pcm ** rpcm) |
717 | { |
718 | struct snd_pcm *pcm; |
719 | int err; |
720 | static struct snd_device_ops ops = { |
721 | .dev_free = snd_pcm_dev_free, |
722 | .dev_register = snd_pcm_dev_register, |
723 | .dev_disconnect = snd_pcm_dev_disconnect, |
724 | }; |
725 | |
726 | if (snd_BUG_ON(!card)) |
727 | return -ENXIO; |
728 | if (rpcm) |
729 | *rpcm = NULL; |
730 | pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); |
731 | if (pcm == NULL) { |
732 | snd_printk(KERN_ERR "Cannot allocate PCM\n"); |
733 | return -ENOMEM; |
734 | } |
735 | pcm->card = card; |
736 | pcm->device = device; |
737 | if (id) |
738 | strlcpy(pcm->id, id, sizeof(pcm->id)); |
739 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) { |
740 | snd_pcm_free(pcm); |
741 | return err; |
742 | } |
743 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) { |
744 | snd_pcm_free(pcm); |
745 | return err; |
746 | } |
747 | mutex_init(&pcm->open_mutex); |
748 | init_waitqueue_head(&pcm->open_wait); |
749 | if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) { |
750 | snd_pcm_free(pcm); |
751 | return err; |
752 | } |
753 | if (rpcm) |
754 | *rpcm = pcm; |
755 | return 0; |
756 | } |
757 | |
758 | EXPORT_SYMBOL(snd_pcm_new); |
759 | |
760 | static void snd_pcm_free_stream(struct snd_pcm_str * pstr) |
761 | { |
762 | struct snd_pcm_substream *substream, *substream_next; |
763 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
764 | struct snd_pcm_oss_setup *setup, *setupn; |
765 | #endif |
766 | substream = pstr->substream; |
767 | while (substream) { |
768 | substream_next = substream->next; |
769 | snd_pcm_timer_done(substream); |
770 | snd_pcm_substream_proc_done(substream); |
771 | kfree(substream); |
772 | substream = substream_next; |
773 | } |
774 | snd_pcm_stream_proc_done(pstr); |
775 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
776 | for (setup = pstr->oss.setup_list; setup; setup = setupn) { |
777 | setupn = setup->next; |
778 | kfree(setup->task_name); |
779 | kfree(setup); |
780 | } |
781 | #endif |
782 | } |
783 | |
784 | static int snd_pcm_free(struct snd_pcm *pcm) |
785 | { |
786 | struct snd_pcm_notify *notify; |
787 | |
788 | if (!pcm) |
789 | return 0; |
790 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
791 | notify->n_unregister(pcm); |
792 | } |
793 | if (pcm->private_free) |
794 | pcm->private_free(pcm); |
795 | snd_pcm_lib_preallocate_free_for_all(pcm); |
796 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]); |
797 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]); |
798 | kfree(pcm); |
799 | return 0; |
800 | } |
801 | |
802 | static int snd_pcm_dev_free(struct snd_device *device) |
803 | { |
804 | struct snd_pcm *pcm = device->device_data; |
805 | return snd_pcm_free(pcm); |
806 | } |
807 | |
808 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, |
809 | struct file *file, |
810 | struct snd_pcm_substream **rsubstream) |
811 | { |
812 | struct snd_pcm_str * pstr; |
813 | struct snd_pcm_substream *substream; |
814 | struct snd_pcm_runtime *runtime; |
815 | struct snd_ctl_file *kctl; |
816 | struct snd_card *card; |
817 | int prefer_subdevice = -1; |
818 | size_t size; |
819 | |
820 | if (snd_BUG_ON(!pcm || !rsubstream)) |
821 | return -ENXIO; |
822 | *rsubstream = NULL; |
823 | pstr = &pcm->streams[stream]; |
824 | if (pstr->substream == NULL || pstr->substream_count == 0) |
825 | return -ENODEV; |
826 | |
827 | card = pcm->card; |
828 | read_lock(&card->ctl_files_rwlock); |
829 | list_for_each_entry(kctl, &card->ctl_files, list) { |
830 | if (kctl->pid == task_pid(current)) { |
831 | prefer_subdevice = kctl->prefer_pcm_subdevice; |
832 | if (prefer_subdevice != -1) |
833 | break; |
834 | } |
835 | } |
836 | read_unlock(&card->ctl_files_rwlock); |
837 | |
838 | switch (stream) { |
839 | case SNDRV_PCM_STREAM_PLAYBACK: |
840 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { |
841 | for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; substream; substream = substream->next) { |
842 | if (SUBSTREAM_BUSY(substream)) |
843 | return -EAGAIN; |
844 | } |
845 | } |
846 | break; |
847 | case SNDRV_PCM_STREAM_CAPTURE: |
848 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { |
849 | for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next) { |
850 | if (SUBSTREAM_BUSY(substream)) |
851 | return -EAGAIN; |
852 | } |
853 | } |
854 | break; |
855 | default: |
856 | return -EINVAL; |
857 | } |
858 | |
859 | if (file->f_flags & O_APPEND) { |
860 | if (prefer_subdevice < 0) { |
861 | if (pstr->substream_count > 1) |
862 | return -EINVAL; /* must be unique */ |
863 | substream = pstr->substream; |
864 | } else { |
865 | for (substream = pstr->substream; substream; |
866 | substream = substream->next) |
867 | if (substream->number == prefer_subdevice) |
868 | break; |
869 | } |
870 | if (! substream) |
871 | return -ENODEV; |
872 | if (! SUBSTREAM_BUSY(substream)) |
873 | return -EBADFD; |
874 | substream->ref_count++; |
875 | *rsubstream = substream; |
876 | return 0; |
877 | } |
878 | |
879 | if (prefer_subdevice >= 0) { |
880 | for (substream = pstr->substream; substream; substream = substream->next) |
881 | if (!SUBSTREAM_BUSY(substream) && substream->number == prefer_subdevice) |
882 | goto __ok; |
883 | } |
884 | for (substream = pstr->substream; substream; substream = substream->next) |
885 | if (!SUBSTREAM_BUSY(substream)) |
886 | break; |
887 | __ok: |
888 | if (substream == NULL) |
889 | return -EAGAIN; |
890 | |
891 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
892 | if (runtime == NULL) |
893 | return -ENOMEM; |
894 | |
895 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)); |
896 | runtime->status = snd_malloc_pages(size, GFP_KERNEL); |
897 | if (runtime->status == NULL) { |
898 | kfree(runtime); |
899 | return -ENOMEM; |
900 | } |
901 | memset((void*)runtime->status, 0, size); |
902 | |
903 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)); |
904 | runtime->control = snd_malloc_pages(size, GFP_KERNEL); |
905 | if (runtime->control == NULL) { |
906 | snd_free_pages((void*)runtime->status, |
907 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); |
908 | kfree(runtime); |
909 | return -ENOMEM; |
910 | } |
911 | memset((void*)runtime->control, 0, size); |
912 | |
913 | init_waitqueue_head(&runtime->sleep); |
914 | init_waitqueue_head(&runtime->tsleep); |
915 | |
916 | runtime->status->state = SNDRV_PCM_STATE_OPEN; |
917 | |
918 | substream->runtime = runtime; |
919 | substream->private_data = pcm->private_data; |
920 | substream->ref_count = 1; |
921 | substream->f_flags = file->f_flags; |
922 | substream->pid = get_pid(task_pid(current)); |
923 | pstr->substream_opened++; |
924 | *rsubstream = substream; |
925 | return 0; |
926 | } |
927 | |
928 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream) |
929 | { |
930 | struct snd_pcm_runtime *runtime; |
931 | |
932 | if (PCM_RUNTIME_CHECK(substream)) |
933 | return; |
934 | runtime = substream->runtime; |
935 | if (runtime->private_free != NULL) |
936 | runtime->private_free(runtime); |
937 | snd_free_pages((void*)runtime->status, |
938 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); |
939 | snd_free_pages((void*)runtime->control, |
940 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))); |
941 | kfree(runtime->hw_constraints.rules); |
942 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
943 | if (runtime->hwptr_log) |
944 | kfree(runtime->hwptr_log); |
945 | #endif |
946 | kfree(runtime); |
947 | substream->runtime = NULL; |
948 | put_pid(substream->pid); |
949 | substream->pid = NULL; |
950 | substream->pstr->substream_opened--; |
951 | } |
952 | |
953 | static ssize_t show_pcm_class(struct device *dev, |
954 | struct device_attribute *attr, char *buf) |
955 | { |
956 | struct snd_pcm *pcm; |
957 | const char *str; |
958 | static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = { |
959 | [SNDRV_PCM_CLASS_GENERIC] = "generic", |
960 | [SNDRV_PCM_CLASS_MULTI] = "multi", |
961 | [SNDRV_PCM_CLASS_MODEM] = "modem", |
962 | [SNDRV_PCM_CLASS_DIGITIZER] = "digitizer", |
963 | }; |
964 | |
965 | if (! (pcm = dev_get_drvdata(dev)) || |
966 | pcm->dev_class > SNDRV_PCM_CLASS_LAST) |
967 | str = "none"; |
968 | else |
969 | str = strs[pcm->dev_class]; |
970 | return snprintf(buf, PAGE_SIZE, "%s\n", str); |
971 | } |
972 | |
973 | static struct device_attribute pcm_attrs = |
974 | __ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL); |
975 | |
976 | static int snd_pcm_dev_register(struct snd_device *device) |
977 | { |
978 | int cidx, err; |
979 | struct snd_pcm_substream *substream; |
980 | struct snd_pcm_notify *notify; |
981 | char str[16]; |
982 | struct snd_pcm *pcm; |
983 | struct device *dev; |
984 | |
985 | if (snd_BUG_ON(!device || !device->device_data)) |
986 | return -ENXIO; |
987 | pcm = device->device_data; |
988 | mutex_lock(®ister_mutex); |
989 | err = snd_pcm_add(pcm); |
990 | if (err) { |
991 | mutex_unlock(®ister_mutex); |
992 | return err; |
993 | } |
994 | for (cidx = 0; cidx < 2; cidx++) { |
995 | int devtype = -1; |
996 | if (pcm->streams[cidx].substream == NULL) |
997 | continue; |
998 | switch (cidx) { |
999 | case SNDRV_PCM_STREAM_PLAYBACK: |
1000 | sprintf(str, "pcmC%iD%ip", pcm->card->number, pcm->device); |
1001 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
1002 | break; |
1003 | case SNDRV_PCM_STREAM_CAPTURE: |
1004 | sprintf(str, "pcmC%iD%ic", pcm->card->number, pcm->device); |
1005 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
1006 | break; |
1007 | } |
1008 | /* device pointer to use, pcm->dev takes precedence if |
1009 | * it is assigned, otherwise fall back to card's device |
1010 | * if possible */ |
1011 | dev = pcm->dev; |
1012 | if (!dev) |
1013 | dev = snd_card_get_device_link(pcm->card); |
1014 | /* register pcm */ |
1015 | err = snd_register_device_for_dev(devtype, pcm->card, |
1016 | pcm->device, |
1017 | &snd_pcm_f_ops[cidx], |
1018 | pcm, str, dev); |
1019 | if (err < 0) { |
1020 | list_del(&pcm->list); |
1021 | mutex_unlock(®ister_mutex); |
1022 | return err; |
1023 | } |
1024 | snd_add_device_sysfs_file(devtype, pcm->card, pcm->device, |
1025 | &pcm_attrs); |
1026 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
1027 | snd_pcm_timer_init(substream); |
1028 | } |
1029 | |
1030 | list_for_each_entry(notify, &snd_pcm_notify_list, list) |
1031 | notify->n_register(pcm); |
1032 | |
1033 | mutex_unlock(®ister_mutex); |
1034 | return 0; |
1035 | } |
1036 | |
1037 | static int snd_pcm_dev_disconnect(struct snd_device *device) |
1038 | { |
1039 | struct snd_pcm *pcm = device->device_data; |
1040 | struct snd_pcm_notify *notify; |
1041 | struct snd_pcm_substream *substream; |
1042 | int cidx, devtype; |
1043 | |
1044 | mutex_lock(®ister_mutex); |
1045 | if (list_empty(&pcm->list)) |
1046 | goto unlock; |
1047 | |
1048 | list_del_init(&pcm->list); |
1049 | for (cidx = 0; cidx < 2; cidx++) |
1050 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
1051 | if (substream->runtime) |
1052 | substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED; |
1053 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
1054 | notify->n_disconnect(pcm); |
1055 | } |
1056 | for (cidx = 0; cidx < 2; cidx++) { |
1057 | devtype = -1; |
1058 | switch (cidx) { |
1059 | case SNDRV_PCM_STREAM_PLAYBACK: |
1060 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
1061 | break; |
1062 | case SNDRV_PCM_STREAM_CAPTURE: |
1063 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
1064 | break; |
1065 | } |
1066 | snd_unregister_device(devtype, pcm->card, pcm->device); |
1067 | } |
1068 | unlock: |
1069 | mutex_unlock(®ister_mutex); |
1070 | return 0; |
1071 | } |
1072 | |
1073 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree) |
1074 | { |
1075 | struct snd_pcm *pcm; |
1076 | |
1077 | if (snd_BUG_ON(!notify || |
1078 | !notify->n_register || |
1079 | !notify->n_unregister || |
1080 | !notify->n_disconnect)) |
1081 | return -EINVAL; |
1082 | mutex_lock(®ister_mutex); |
1083 | if (nfree) { |
1084 | list_del(¬ify->list); |
1085 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1086 | notify->n_unregister(pcm); |
1087 | } else { |
1088 | list_add_tail(¬ify->list, &snd_pcm_notify_list); |
1089 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1090 | notify->n_register(pcm); |
1091 | } |
1092 | mutex_unlock(®ister_mutex); |
1093 | return 0; |
1094 | } |
1095 | |
1096 | EXPORT_SYMBOL(snd_pcm_notify); |
1097 | |
1098 | #ifdef CONFIG_PROC_FS |
1099 | /* |
1100 | * Info interface |
1101 | */ |
1102 | |
1103 | static void snd_pcm_proc_read(struct snd_info_entry *entry, |
1104 | struct snd_info_buffer *buffer) |
1105 | { |
1106 | struct snd_pcm *pcm; |
1107 | |
1108 | mutex_lock(®ister_mutex); |
1109 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
1110 | snd_iprintf(buffer, "%02i-%02i: %s : %s", |
1111 | pcm->card->number, pcm->device, pcm->id, pcm->name); |
1112 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) |
1113 | snd_iprintf(buffer, " : playback %i", |
1114 | pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count); |
1115 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) |
1116 | snd_iprintf(buffer, " : capture %i", |
1117 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); |
1118 | snd_iprintf(buffer, "\n"); |
1119 | } |
1120 | mutex_unlock(®ister_mutex); |
1121 | } |
1122 | |
1123 | static struct snd_info_entry *snd_pcm_proc_entry; |
1124 | |
1125 | static void snd_pcm_proc_init(void) |
1126 | { |
1127 | struct snd_info_entry *entry; |
1128 | |
1129 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) { |
1130 | snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read); |
1131 | if (snd_info_register(entry) < 0) { |
1132 | snd_info_free_entry(entry); |
1133 | entry = NULL; |
1134 | } |
1135 | } |
1136 | snd_pcm_proc_entry = entry; |
1137 | } |
1138 | |
1139 | static void snd_pcm_proc_done(void) |
1140 | { |
1141 | snd_info_free_entry(snd_pcm_proc_entry); |
1142 | } |
1143 | |
1144 | #else /* !CONFIG_PROC_FS */ |
1145 | #define snd_pcm_proc_init() |
1146 | #define snd_pcm_proc_done() |
1147 | #endif /* CONFIG_PROC_FS */ |
1148 | |
1149 | |
1150 | /* |
1151 | * ENTRY functions |
1152 | */ |
1153 | |
1154 | static int __init alsa_pcm_init(void) |
1155 | { |
1156 | snd_ctl_register_ioctl(snd_pcm_control_ioctl); |
1157 | snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl); |
1158 | snd_pcm_proc_init(); |
1159 | return 0; |
1160 | } |
1161 | |
1162 | static void __exit alsa_pcm_exit(void) |
1163 | { |
1164 | snd_ctl_unregister_ioctl(snd_pcm_control_ioctl); |
1165 | snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl); |
1166 | snd_pcm_proc_done(); |
1167 | } |
1168 | |
1169 | module_init(alsa_pcm_init) |
1170 | module_exit(alsa_pcm_exit) |
1171 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9