blob: 1a3070b4e5b5fc043d04ed734df76a51503bb65f [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Digital Audio (PCM) abstract layer
Jaroslav Kyselac1017a42007-10-15 09:50:19 +02003 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/init.h>
23#include <linux/slab.h>
Paul Gortmakerda155d52011-07-15 12:38:28 -040024#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/time.h>
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010026#include <linux/mutex.h>
Paul Gortmaker51990e82012-01-22 11:23:42 -050027#include <linux/device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <sound/core.h>
29#include <sound/minors.h>
30#include <sound/pcm.h>
31#include <sound/control.h>
32#include <sound/info.h>
33
Jaroslav Kyselac1017a42007-10-15 09:50:19 +020034MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
Linus Torvalds1da177e2005-04-16 15:20:36 -070035MODULE_DESCRIPTION("Midlevel PCM code for ALSA.");
36MODULE_LICENSE("GPL");
37
Clemens Ladischf87135f2005-11-20 14:06:59 +010038static LIST_HEAD(snd_pcm_devices);
Linus Torvalds1da177e2005-04-16 15:20:36 -070039static LIST_HEAD(snd_pcm_notify_list);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010040static DEFINE_MUTEX(register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Takashi Iwai877211f2005-11-17 13:59:38 +010042static int snd_pcm_free(struct snd_pcm *pcm);
43static int snd_pcm_dev_free(struct snd_device *device);
44static int snd_pcm_dev_register(struct snd_device *device);
45static int snd_pcm_dev_disconnect(struct snd_device *device);
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
Pawel MOLLf90c06a2008-07-30 12:46:40 +010047static struct snd_pcm *snd_pcm_get(struct snd_card *card, int device)
Clemens Ladischf87135f2005-11-20 14:06:59 +010048{
Clemens Ladischf87135f2005-11-20 14:06:59 +010049 struct snd_pcm *pcm;
50
Johannes Berg9244b2c2006-10-05 16:02:22 +020051 list_for_each_entry(pcm, &snd_pcm_devices, list) {
Clemens Ladischf87135f2005-11-20 14:06:59 +010052 if (pcm->card == card && pcm->device == device)
53 return pcm;
54 }
55 return NULL;
56}
57
Pawel MOLLf90c06a2008-07-30 12:46:40 +010058static int snd_pcm_next(struct snd_card *card, int device)
59{
60 struct snd_pcm *pcm;
61
62 list_for_each_entry(pcm, &snd_pcm_devices, list) {
63 if (pcm->card == card && pcm->device > device)
64 return pcm->device;
65 else if (pcm->card->number > card->number)
66 return -1;
67 }
68 return -1;
69}
70
71static int snd_pcm_add(struct snd_pcm *newpcm)
72{
73 struct snd_pcm *pcm;
74
75 list_for_each_entry(pcm, &snd_pcm_devices, list) {
76 if (pcm->card == newpcm->card && pcm->device == newpcm->device)
77 return -EBUSY;
78 if (pcm->card->number > newpcm->card->number ||
79 (pcm->card == newpcm->card &&
80 pcm->device > newpcm->device)) {
81 list_add(&newpcm->list, pcm->list.prev);
82 return 0;
83 }
84 }
85 list_add_tail(&newpcm->list, &snd_pcm_devices);
86 return 0;
87}
88
Takashi Iwai877211f2005-11-17 13:59:38 +010089static int snd_pcm_control_ioctl(struct snd_card *card,
90 struct snd_ctl_file *control,
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 unsigned int cmd, unsigned long arg)
92{
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 switch (cmd) {
94 case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE:
95 {
96 int device;
97
98 if (get_user(device, (int __user *)arg))
99 return -EFAULT;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100100 mutex_lock(&register_mutex);
Pawel MOLLf90c06a2008-07-30 12:46:40 +0100101 device = snd_pcm_next(card, device);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100102 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 if (put_user(device, (int __user *)arg))
104 return -EFAULT;
105 return 0;
106 }
107 case SNDRV_CTL_IOCTL_PCM_INFO:
108 {
Takashi Iwai877211f2005-11-17 13:59:38 +0100109 struct snd_pcm_info __user *info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 unsigned int device, subdevice;
Takashi Iwai877211f2005-11-17 13:59:38 +0100111 int stream;
112 struct snd_pcm *pcm;
113 struct snd_pcm_str *pstr;
114 struct snd_pcm_substream *substream;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100115 int err;
116
Takashi Iwai877211f2005-11-17 13:59:38 +0100117 info = (struct snd_pcm_info __user *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 if (get_user(device, &info->device))
119 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 if (get_user(stream, &info->stream))
121 return -EFAULT;
122 if (stream < 0 || stream > 1)
123 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 if (get_user(subdevice, &info->subdevice))
125 return -EFAULT;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100126 mutex_lock(&register_mutex);
Pawel MOLLf90c06a2008-07-30 12:46:40 +0100127 pcm = snd_pcm_get(card, device);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100128 if (pcm == NULL) {
129 err = -ENXIO;
130 goto _error;
131 }
132 pstr = &pcm->streams[stream];
133 if (pstr->substream_count == 0) {
134 err = -ENOENT;
135 goto _error;
136 }
137 if (subdevice >= pstr->substream_count) {
138 err = -ENXIO;
139 goto _error;
140 }
141 for (substream = pstr->substream; substream;
142 substream = substream->next)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 if (substream->number == (int)subdevice)
144 break;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100145 if (substream == NULL) {
146 err = -ENXIO;
147 goto _error;
148 }
149 err = snd_pcm_info_user(substream, info);
150 _error:
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100151 mutex_unlock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100152 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 }
154 case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE:
155 {
156 int val;
157
158 if (get_user(val, (int __user *)arg))
159 return -EFAULT;
160 control->prefer_pcm_subdevice = val;
161 return 0;
162 }
163 }
164 return -ENOIOCTLCMD;
165}
Jaroslav Kysela21a34792006-01-13 09:12:11 +0100166
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167#define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169static char *snd_pcm_format_names[] = {
170 FORMAT(S8),
171 FORMAT(U8),
172 FORMAT(S16_LE),
173 FORMAT(S16_BE),
174 FORMAT(U16_LE),
175 FORMAT(U16_BE),
176 FORMAT(S24_LE),
177 FORMAT(S24_BE),
178 FORMAT(U24_LE),
179 FORMAT(U24_BE),
180 FORMAT(S32_LE),
181 FORMAT(S32_BE),
182 FORMAT(U32_LE),
183 FORMAT(U32_BE),
184 FORMAT(FLOAT_LE),
185 FORMAT(FLOAT_BE),
186 FORMAT(FLOAT64_LE),
187 FORMAT(FLOAT64_BE),
188 FORMAT(IEC958_SUBFRAME_LE),
189 FORMAT(IEC958_SUBFRAME_BE),
190 FORMAT(MU_LAW),
191 FORMAT(A_LAW),
192 FORMAT(IMA_ADPCM),
193 FORMAT(MPEG),
194 FORMAT(GSM),
195 FORMAT(SPECIAL),
196 FORMAT(S24_3LE),
197 FORMAT(S24_3BE),
198 FORMAT(U24_3LE),
199 FORMAT(U24_3BE),
200 FORMAT(S20_3LE),
201 FORMAT(S20_3BE),
202 FORMAT(U20_3LE),
203 FORMAT(U20_3BE),
204 FORMAT(S18_3LE),
205 FORMAT(S18_3BE),
206 FORMAT(U18_3LE),
207 FORMAT(U18_3BE),
Dan Carpenter7a288262010-08-27 22:02:15 +0200208 FORMAT(G723_24),
209 FORMAT(G723_24_1B),
210 FORMAT(G723_40),
211 FORMAT(G723_40_1B),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212};
213
Takashi Iwai6e5265e2009-09-08 14:26:51 +0200214const char *snd_pcm_format_name(snd_pcm_format_t format)
Takashi Iwaie28563c2005-12-01 10:42:42 +0100215{
Clemens Ladischfea952e2011-02-14 11:00:47 +0100216 if ((__force unsigned int)format >= ARRAY_SIZE(snd_pcm_format_names))
Dan Carpenter7a288262010-08-27 22:02:15 +0200217 return "Unknown";
Clemens Ladischfea952e2011-02-14 11:00:47 +0100218 return snd_pcm_format_names[(__force unsigned int)format];
Takashi Iwaie28563c2005-12-01 10:42:42 +0100219}
Takashi Iwai6e5265e2009-09-08 14:26:51 +0200220EXPORT_SYMBOL_GPL(snd_pcm_format_name);
221
222#ifdef CONFIG_SND_VERBOSE_PROCFS
223
224#define STATE(v) [SNDRV_PCM_STATE_##v] = #v
225#define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v
226#define READY(v) [SNDRV_PCM_READY_##v] = #v
227#define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v
228#define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v
229#define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v
230#define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v
231#define START(v) [SNDRV_PCM_START_##v] = #v
232#define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v
Takashi Iwaie28563c2005-12-01 10:42:42 +0100233
Takashi Iwaie28563c2005-12-01 10:42:42 +0100234static char *snd_pcm_stream_names[] = {
235 STREAM(PLAYBACK),
236 STREAM(CAPTURE),
237};
238
239static char *snd_pcm_state_names[] = {
240 STATE(OPEN),
241 STATE(SETUP),
242 STATE(PREPARED),
243 STATE(RUNNING),
244 STATE(XRUN),
245 STATE(DRAINING),
246 STATE(PAUSED),
247 STATE(SUSPENDED),
248};
249
250static char *snd_pcm_access_names[] = {
251 ACCESS(MMAP_INTERLEAVED),
252 ACCESS(MMAP_NONINTERLEAVED),
253 ACCESS(MMAP_COMPLEX),
254 ACCESS(RW_INTERLEAVED),
255 ACCESS(RW_NONINTERLEAVED),
256};
257
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258static char *snd_pcm_subformat_names[] = {
259 SUBFORMAT(STD),
260};
261
262static char *snd_pcm_tstamp_mode_names[] = {
263 TSTAMP(NONE),
Jaroslav Kysela8c121582008-01-11 08:45:08 +0100264 TSTAMP(ENABLE),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265};
266
Takashi Iwai877211f2005-11-17 13:59:38 +0100267static const char *snd_pcm_stream_name(int stream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 return snd_pcm_stream_names[stream];
270}
271
272static const char *snd_pcm_access_name(snd_pcm_access_t access)
273{
Clemens Ladischfea952e2011-02-14 11:00:47 +0100274 return snd_pcm_access_names[(__force int)access];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275}
276
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat)
278{
Clemens Ladischfea952e2011-02-14 11:00:47 +0100279 return snd_pcm_subformat_names[(__force int)subformat];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280}
281
Takashi Iwai877211f2005-11-17 13:59:38 +0100282static const char *snd_pcm_tstamp_mode_name(int mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 return snd_pcm_tstamp_mode_names[mode];
285}
286
287static const char *snd_pcm_state_name(snd_pcm_state_t state)
288{
Clemens Ladischfea952e2011-02-14 11:00:47 +0100289 return snd_pcm_state_names[(__force int)state];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290}
291
292#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
293#include <linux/soundcard.h>
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100294
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295static const char *snd_pcm_oss_format_name(int format)
296{
297 switch (format) {
298 case AFMT_MU_LAW:
299 return "MU_LAW";
300 case AFMT_A_LAW:
301 return "A_LAW";
302 case AFMT_IMA_ADPCM:
303 return "IMA_ADPCM";
304 case AFMT_U8:
305 return "U8";
306 case AFMT_S16_LE:
307 return "S16_LE";
308 case AFMT_S16_BE:
309 return "S16_BE";
310 case AFMT_S8:
311 return "S8";
312 case AFMT_U16_LE:
313 return "U16_LE";
314 case AFMT_U16_BE:
315 return "U16_BE";
316 case AFMT_MPEG:
317 return "MPEG";
318 default:
319 return "unknown";
320 }
321}
322#endif
323
Takashi Iwai877211f2005-11-17 13:59:38 +0100324static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream,
325 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326{
Takashi Iwai877211f2005-11-17 13:59:38 +0100327 struct snd_pcm_info *info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 int err;
329
Takashi Iwai7c22f1a2005-10-10 11:46:31 +0200330 if (! substream)
331 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332
333 info = kmalloc(sizeof(*info), GFP_KERNEL);
334 if (! info) {
335 printk(KERN_DEBUG "snd_pcm_proc_info_read: cannot malloc\n");
336 return;
337 }
338
339 err = snd_pcm_info(substream, info);
340 if (err < 0) {
341 snd_iprintf(buffer, "error %d\n", err);
342 kfree(info);
343 return;
344 }
345 snd_iprintf(buffer, "card: %d\n", info->card);
346 snd_iprintf(buffer, "device: %d\n", info->device);
347 snd_iprintf(buffer, "subdevice: %d\n", info->subdevice);
348 snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream));
349 snd_iprintf(buffer, "id: %s\n", info->id);
350 snd_iprintf(buffer, "name: %s\n", info->name);
351 snd_iprintf(buffer, "subname: %s\n", info->subname);
352 snd_iprintf(buffer, "class: %d\n", info->dev_class);
353 snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass);
354 snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count);
355 snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail);
356 kfree(info);
357}
358
Takashi Iwai877211f2005-11-17 13:59:38 +0100359static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry,
360 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361{
Takashi Iwai877211f2005-11-17 13:59:38 +0100362 snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream,
363 buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364}
365
Takashi Iwai877211f2005-11-17 13:59:38 +0100366static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry,
367 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368{
Joe Perches9fe856e2010-09-04 18:52:54 -0700369 snd_pcm_proc_info_read(entry->private_data, buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370}
371
Takashi Iwai877211f2005-11-17 13:59:38 +0100372static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry,
373 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374{
Takashi Iwai877211f2005-11-17 13:59:38 +0100375 struct snd_pcm_substream *substream = entry->private_data;
Takashi Iwai901d46d2010-09-16 23:06:50 +0200376 struct snd_pcm_runtime *runtime;
377
378 mutex_lock(&substream->pcm->open_mutex);
379 runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 if (!runtime) {
381 snd_iprintf(buffer, "closed\n");
Takashi Iwai901d46d2010-09-16 23:06:50 +0200382 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
385 snd_iprintf(buffer, "no setup\n");
Takashi Iwai901d46d2010-09-16 23:06:50 +0200386 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 }
388 snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access));
389 snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format));
390 snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat));
391 snd_iprintf(buffer, "channels: %u\n", runtime->channels);
392 snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den);
393 snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size);
394 snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
396 if (substream->oss.oss) {
397 snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format));
398 snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels);
399 snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate);
400 snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes);
401 snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods);
402 snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames);
403 }
404#endif
Takashi Iwai901d46d2010-09-16 23:06:50 +0200405 unlock:
406 mutex_unlock(&substream->pcm->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407}
408
Takashi Iwai877211f2005-11-17 13:59:38 +0100409static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry,
410 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411{
Takashi Iwai877211f2005-11-17 13:59:38 +0100412 struct snd_pcm_substream *substream = entry->private_data;
Takashi Iwai901d46d2010-09-16 23:06:50 +0200413 struct snd_pcm_runtime *runtime;
414
415 mutex_lock(&substream->pcm->open_mutex);
416 runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 if (!runtime) {
418 snd_iprintf(buffer, "closed\n");
Takashi Iwai901d46d2010-09-16 23:06:50 +0200419 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
422 snd_iprintf(buffer, "no setup\n");
Takashi Iwai901d46d2010-09-16 23:06:50 +0200423 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 }
425 snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode));
426 snd_iprintf(buffer, "period_step: %u\n", runtime->period_step);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold);
429 snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold);
430 snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold);
431 snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size);
432 snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary);
Takashi Iwai901d46d2010-09-16 23:06:50 +0200433 unlock:
434 mutex_unlock(&substream->pcm->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435}
436
Takashi Iwai877211f2005-11-17 13:59:38 +0100437static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry,
438 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439{
Takashi Iwai877211f2005-11-17 13:59:38 +0100440 struct snd_pcm_substream *substream = entry->private_data;
Takashi Iwai901d46d2010-09-16 23:06:50 +0200441 struct snd_pcm_runtime *runtime;
Takashi Iwai877211f2005-11-17 13:59:38 +0100442 struct snd_pcm_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 int err;
Takashi Iwai901d46d2010-09-16 23:06:50 +0200444
445 mutex_lock(&substream->pcm->open_mutex);
446 runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 if (!runtime) {
448 snd_iprintf(buffer, "closed\n");
Takashi Iwai901d46d2010-09-16 23:06:50 +0200449 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 }
451 memset(&status, 0, sizeof(status));
452 err = snd_pcm_status(substream, &status);
453 if (err < 0) {
454 snd_iprintf(buffer, "error %d\n", err);
Takashi Iwai901d46d2010-09-16 23:06:50 +0200455 goto unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 }
457 snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state));
Clemens Ladische7373b72009-11-10 10:13:30 +0100458 snd_iprintf(buffer, "owner_pid : %d\n", pid_vnr(substream->pid));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 snd_iprintf(buffer, "trigger_time: %ld.%09ld\n",
460 status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec);
461 snd_iprintf(buffer, "tstamp : %ld.%09ld\n",
462 status.tstamp.tv_sec, status.tstamp.tv_nsec);
463 snd_iprintf(buffer, "delay : %ld\n", status.delay);
464 snd_iprintf(buffer, "avail : %ld\n", status.avail);
465 snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max);
466 snd_iprintf(buffer, "-----\n");
467 snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr);
468 snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr);
Takashi Iwai901d46d2010-09-16 23:06:50 +0200469 unlock:
470 mutex_unlock(&substream->pcm->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
Jaroslav Kysela61fb63c2006-04-24 21:57:16 +0200473#ifdef CONFIG_SND_PCM_XRUN_DEBUG
Takashi Iwai877211f2005-11-17 13:59:38 +0100474static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry,
475 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476{
Takashi Iwai877211f2005-11-17 13:59:38 +0100477 struct snd_pcm_str *pstr = entry->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 snd_iprintf(buffer, "%d\n", pstr->xrun_debug);
479}
480
Takashi Iwai877211f2005-11-17 13:59:38 +0100481static void snd_pcm_xrun_debug_write(struct snd_info_entry *entry,
482 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483{
Takashi Iwai877211f2005-11-17 13:59:38 +0100484 struct snd_pcm_str *pstr = entry->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 char line[64];
486 if (!snd_info_get_line(buffer, line, sizeof(line)))
487 pstr->xrun_debug = simple_strtoul(line, NULL, 10);
488}
489#endif
490
Takashi Iwai877211f2005-11-17 13:59:38 +0100491static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492{
Takashi Iwai877211f2005-11-17 13:59:38 +0100493 struct snd_pcm *pcm = pstr->pcm;
494 struct snd_info_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 char name[16];
496
497 sprintf(name, "pcm%i%c", pcm->device,
498 pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c');
499 if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL)
500 return -ENOMEM;
501 entry->mode = S_IFDIR | S_IRUGO | S_IXUGO;
502 if (snd_info_register(entry) < 0) {
503 snd_info_free_entry(entry);
504 return -ENOMEM;
505 }
506 pstr->proc_root = entry;
507
508 if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) {
Takashi Iwaibf850202006-04-28 15:13:41 +0200509 snd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 if (snd_info_register(entry) < 0) {
511 snd_info_free_entry(entry);
512 entry = NULL;
513 }
514 }
515 pstr->proc_info_entry = entry;
516
Jaroslav Kysela61fb63c2006-04-24 21:57:16 +0200517#ifdef CONFIG_SND_PCM_XRUN_DEBUG
Takashi Iwai877211f2005-11-17 13:59:38 +0100518 if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug",
519 pstr->proc_root)) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 entry->c.text.read = snd_pcm_xrun_debug_read;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 entry->c.text.write = snd_pcm_xrun_debug_write;
Takashi Iwaibd7bf042005-04-12 16:27:28 +0200522 entry->mode |= S_IWUSR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 entry->private_data = pstr;
524 if (snd_info_register(entry) < 0) {
525 snd_info_free_entry(entry);
526 entry = NULL;
527 }
528 }
529 pstr->proc_xrun_debug_entry = entry;
530#endif
531 return 0;
532}
533
Takashi Iwai877211f2005-11-17 13:59:38 +0100534static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535{
Jaroslav Kysela61fb63c2006-04-24 21:57:16 +0200536#ifdef CONFIG_SND_PCM_XRUN_DEBUG
Takashi Iwai746d4a02006-06-23 14:37:59 +0200537 snd_info_free_entry(pstr->proc_xrun_debug_entry);
538 pstr->proc_xrun_debug_entry = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539#endif
Takashi Iwai746d4a02006-06-23 14:37:59 +0200540 snd_info_free_entry(pstr->proc_info_entry);
541 pstr->proc_info_entry = NULL;
542 snd_info_free_entry(pstr->proc_root);
543 pstr->proc_root = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 return 0;
545}
546
Takashi Iwai877211f2005-11-17 13:59:38 +0100547static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548{
Takashi Iwai877211f2005-11-17 13:59:38 +0100549 struct snd_info_entry *entry;
550 struct snd_card *card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 char name[16];
552
553 card = substream->pcm->card;
554
555 sprintf(name, "sub%i", substream->number);
556 if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL)
557 return -ENOMEM;
558 entry->mode = S_IFDIR | S_IRUGO | S_IXUGO;
559 if (snd_info_register(entry) < 0) {
560 snd_info_free_entry(entry);
561 return -ENOMEM;
562 }
563 substream->proc_root = entry;
564
565 if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) {
Takashi Iwaibf850202006-04-28 15:13:41 +0200566 snd_info_set_text_ops(entry, substream,
567 snd_pcm_substream_proc_info_read);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 if (snd_info_register(entry) < 0) {
569 snd_info_free_entry(entry);
570 entry = NULL;
571 }
572 }
573 substream->proc_info_entry = entry;
574
575 if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) {
Takashi Iwaibf850202006-04-28 15:13:41 +0200576 snd_info_set_text_ops(entry, substream,
577 snd_pcm_substream_proc_hw_params_read);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 if (snd_info_register(entry) < 0) {
579 snd_info_free_entry(entry);
580 entry = NULL;
581 }
582 }
583 substream->proc_hw_params_entry = entry;
584
585 if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) {
Takashi Iwaibf850202006-04-28 15:13:41 +0200586 snd_info_set_text_ops(entry, substream,
587 snd_pcm_substream_proc_sw_params_read);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 if (snd_info_register(entry) < 0) {
589 snd_info_free_entry(entry);
590 entry = NULL;
591 }
592 }
593 substream->proc_sw_params_entry = entry;
594
595 if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) {
Takashi Iwaibf850202006-04-28 15:13:41 +0200596 snd_info_set_text_ops(entry, substream,
597 snd_pcm_substream_proc_status_read);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 if (snd_info_register(entry) < 0) {
599 snd_info_free_entry(entry);
600 entry = NULL;
601 }
602 }
603 substream->proc_status_entry = entry;
604
605 return 0;
606}
Takashi Iwai746d4a02006-06-23 14:37:59 +0200607
Takashi Iwai877211f2005-11-17 13:59:38 +0100608static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609{
Takashi Iwai746d4a02006-06-23 14:37:59 +0200610 snd_info_free_entry(substream->proc_info_entry);
611 substream->proc_info_entry = NULL;
612 snd_info_free_entry(substream->proc_hw_params_entry);
613 substream->proc_hw_params_entry = NULL;
614 snd_info_free_entry(substream->proc_sw_params_entry);
615 substream->proc_sw_params_entry = NULL;
616 snd_info_free_entry(substream->proc_status_entry);
617 substream->proc_status_entry = NULL;
618 snd_info_free_entry(substream->proc_root);
619 substream->proc_root = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 return 0;
621}
Takashi Iwaib7d90a32006-04-25 12:56:04 +0200622#else /* !CONFIG_SND_VERBOSE_PROCFS */
Takashi Iwaie28563c2005-12-01 10:42:42 +0100623static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; }
624static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; }
625static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; }
626static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; }
Takashi Iwaib7d90a32006-04-25 12:56:04 +0200627#endif /* CONFIG_SND_VERBOSE_PROCFS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628
629/**
630 * snd_pcm_new_stream - create a new PCM stream
631 * @pcm: the pcm instance
632 * @stream: the stream direction, SNDRV_PCM_STREAM_XXX
633 * @substream_count: the number of substreams
634 *
635 * Creates a new stream for the pcm.
636 * The corresponding stream on the pcm must have been empty before
637 * calling this, i.e. zero must be given to the argument of
638 * snd_pcm_new().
639 *
640 * Returns zero if successful, or a negative error code on failure.
641 */
Takashi Iwai877211f2005-11-17 13:59:38 +0100642int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643{
644 int idx, err;
Takashi Iwai877211f2005-11-17 13:59:38 +0100645 struct snd_pcm_str *pstr = &pcm->streams[stream];
646 struct snd_pcm_substream *substream, *prev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647
648#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100649 mutex_init(&pstr->oss.setup_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650#endif
651 pstr->stream = stream;
652 pstr->pcm = pcm;
653 pstr->substream_count = substream_count;
Liam Girdwood945e5032012-02-08 20:33:31 +0000654 if (substream_count > 0 && !pcm->internal) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 err = snd_pcm_stream_proc_init(pstr);
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100656 if (err < 0) {
657 snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 return err;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100659 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 }
661 prev = NULL;
662 for (idx = 0, prev = NULL; idx < substream_count; idx++) {
Takashi Iwaica2c0962005-09-09 14:20:23 +0200663 substream = kzalloc(sizeof(*substream), GFP_KERNEL);
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100664 if (substream == NULL) {
665 snd_printk(KERN_ERR "Cannot allocate PCM substream\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 return -ENOMEM;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100667 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 substream->pcm = pcm;
669 substream->pstr = pstr;
670 substream->number = idx;
671 substream->stream = stream;
672 sprintf(substream->name, "subdevice #%i", idx);
673 substream->buffer_bytes_max = UINT_MAX;
674 if (prev == NULL)
675 pstr->substream = substream;
676 else
677 prev->next = substream;
Liam Girdwood945e5032012-02-08 20:33:31 +0000678
679 if (!pcm->internal) {
680 err = snd_pcm_substream_proc_init(substream);
681 if (err < 0) {
682 snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n");
683 if (prev == NULL)
684 pstr->substream = NULL;
685 else
686 prev->next = NULL;
687 kfree(substream);
688 return err;
689 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 }
691 substream->group = &substream->self_group;
692 spin_lock_init(&substream->self_group.lock);
693 INIT_LIST_HEAD(&substream->self_group.substreams);
694 list_add_tail(&substream->link_list, &substream->self_group.substreams);
Takashi Iwai9c323fc2006-04-28 15:13:41 +0200695 atomic_set(&substream->mmap_count, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 prev = substream;
697 }
698 return 0;
699}
700
Takashi Iwaie88e8ae62006-04-28 15:13:40 +0200701EXPORT_SYMBOL(snd_pcm_new_stream);
702
Liam Girdwood945e5032012-02-08 20:33:31 +0000703static int _snd_pcm_new(struct snd_card *card, const char *id, int device,
704 int playback_count, int capture_count, bool internal,
705 struct snd_pcm **rpcm)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706{
Takashi Iwai877211f2005-11-17 13:59:38 +0100707 struct snd_pcm *pcm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 int err;
Takashi Iwai877211f2005-11-17 13:59:38 +0100709 static struct snd_device_ops ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 .dev_free = snd_pcm_dev_free,
711 .dev_register = snd_pcm_dev_register,
712 .dev_disconnect = snd_pcm_dev_disconnect,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 };
714
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200715 if (snd_BUG_ON(!card))
716 return -ENXIO;
717 if (rpcm)
718 *rpcm = NULL;
Takashi Iwaica2c0962005-09-09 14:20:23 +0200719 pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100720 if (pcm == NULL) {
721 snd_printk(KERN_ERR "Cannot allocate PCM\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 return -ENOMEM;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100723 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 pcm->card = card;
725 pcm->device = device;
Liam Girdwood945e5032012-02-08 20:33:31 +0000726 pcm->internal = internal;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100727 if (id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 strlcpy(pcm->id, id, sizeof(pcm->id));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) {
730 snd_pcm_free(pcm);
731 return err;
732 }
733 if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) {
734 snd_pcm_free(pcm);
735 return err;
736 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100737 mutex_init(&pcm->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 init_waitqueue_head(&pcm->open_wait);
739 if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) {
740 snd_pcm_free(pcm);
741 return err;
742 }
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200743 if (rpcm)
744 *rpcm = pcm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 return 0;
746}
747
Liam Girdwood945e5032012-02-08 20:33:31 +0000748/**
749 * snd_pcm_new - create a new PCM instance
750 * @card: the card instance
751 * @id: the id string
752 * @device: the device index (zero based)
753 * @playback_count: the number of substreams for playback
754 * @capture_count: the number of substreams for capture
755 * @rpcm: the pointer to store the new pcm instance
756 *
757 * Creates a new PCM instance.
758 *
759 * The pcm operators have to be set afterwards to the new instance
760 * via snd_pcm_set_ops().
761 *
762 * Returns zero if successful, or a negative error code on failure.
763 */
764int snd_pcm_new(struct snd_card *card, const char *id, int device,
765 int playback_count, int capture_count, struct snd_pcm **rpcm)
766{
767 return _snd_pcm_new(card, id, device, playback_count, capture_count,
768 false, rpcm);
769}
Takashi Iwaie88e8ae62006-04-28 15:13:40 +0200770EXPORT_SYMBOL(snd_pcm_new);
771
Liam Girdwood945e5032012-02-08 20:33:31 +0000772/**
773 * snd_pcm_new_internal - create a new internal PCM instance
774 * @card: the card instance
775 * @id: the id string
776 * @device: the device index (zero based - shared with normal PCMs)
777 * @playback_count: the number of substreams for playback
778 * @capture_count: the number of substreams for capture
779 * @rpcm: the pointer to store the new pcm instance
780 *
781 * Creates a new internal PCM instance with no userspace device or procfs
782 * entries. This is used by ASoC Back End PCMs in order to create a PCM that
783 * will only be used internally by kernel drivers. i.e. it cannot be opened
784 * by userspace. It provides existing ASoC components drivers with a substream
785 * and access to any private data.
786 *
787 * The pcm operators have to be set afterwards to the new instance
788 * via snd_pcm_set_ops().
789 *
790 * Returns zero if successful, or a negative error code on failure.
791 */
792int snd_pcm_new_internal(struct snd_card *card, const char *id, int device,
793 int playback_count, int capture_count,
794 struct snd_pcm **rpcm)
795{
796 return _snd_pcm_new(card, id, device, playback_count, capture_count,
797 true, rpcm);
798}
799EXPORT_SYMBOL(snd_pcm_new_internal);
800
Takashi Iwai877211f2005-11-17 13:59:38 +0100801static void snd_pcm_free_stream(struct snd_pcm_str * pstr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802{
Takashi Iwai877211f2005-11-17 13:59:38 +0100803 struct snd_pcm_substream *substream, *substream_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
Takashi Iwai877211f2005-11-17 13:59:38 +0100805 struct snd_pcm_oss_setup *setup, *setupn;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806#endif
807 substream = pstr->substream;
808 while (substream) {
809 substream_next = substream->next;
Takashi Iwaic4614822006-06-23 14:38:23 +0200810 snd_pcm_timer_done(substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 snd_pcm_substream_proc_done(substream);
812 kfree(substream);
813 substream = substream_next;
814 }
815 snd_pcm_stream_proc_done(pstr);
816#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
817 for (setup = pstr->oss.setup_list; setup; setup = setupn) {
818 setupn = setup->next;
819 kfree(setup->task_name);
820 kfree(setup);
821 }
822#endif
823}
824
Takashi Iwai877211f2005-11-17 13:59:38 +0100825static int snd_pcm_free(struct snd_pcm *pcm)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826{
Takashi Iwaic4614822006-06-23 14:38:23 +0200827 struct snd_pcm_notify *notify;
828
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200829 if (!pcm)
830 return 0;
Takashi Iwaic4614822006-06-23 14:38:23 +0200831 list_for_each_entry(notify, &snd_pcm_notify_list, list) {
832 notify->n_unregister(pcm);
833 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 if (pcm->private_free)
835 pcm->private_free(pcm);
836 snd_pcm_lib_preallocate_free_for_all(pcm);
837 snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]);
838 snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]);
839 kfree(pcm);
840 return 0;
841}
842
Takashi Iwai877211f2005-11-17 13:59:38 +0100843static int snd_pcm_dev_free(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844{
Takashi Iwai877211f2005-11-17 13:59:38 +0100845 struct snd_pcm *pcm = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 return snd_pcm_free(pcm);
847}
848
Takashi Iwai3bf75f92006-03-27 16:40:49 +0200849int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream,
850 struct file *file,
851 struct snd_pcm_substream **rsubstream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852{
Takashi Iwai877211f2005-11-17 13:59:38 +0100853 struct snd_pcm_str * pstr;
854 struct snd_pcm_substream *substream;
855 struct snd_pcm_runtime *runtime;
856 struct snd_ctl_file *kctl;
857 struct snd_card *card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 int prefer_subdevice = -1;
859 size_t size;
860
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200861 if (snd_BUG_ON(!pcm || !rsubstream))
862 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 *rsubstream = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 pstr = &pcm->streams[stream];
Takashi Iwai3bf75f92006-03-27 16:40:49 +0200865 if (pstr->substream == NULL || pstr->substream_count == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 return -ENODEV;
867
868 card = pcm->card;
Takashi Iwai399ccdc2008-09-25 14:51:03 +0200869 read_lock(&card->ctl_files_rwlock);
Johannes Berg9244b2c2006-10-05 16:02:22 +0200870 list_for_each_entry(kctl, &card->ctl_files, list) {
Clemens Ladisch25d27ed2009-11-02 09:35:44 +0100871 if (kctl->pid == task_pid(current)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 prefer_subdevice = kctl->prefer_pcm_subdevice;
Takashi Iwai2529bba2006-08-04 12:57:19 +0200873 if (prefer_subdevice != -1)
874 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 }
876 }
Takashi Iwai399ccdc2008-09-25 14:51:03 +0200877 read_unlock(&card->ctl_files_rwlock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 switch (stream) {
880 case SNDRV_PCM_STREAM_PLAYBACK:
881 if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) {
882 for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; substream; substream = substream->next) {
883 if (SUBSTREAM_BUSY(substream))
884 return -EAGAIN;
885 }
886 }
887 break;
888 case SNDRV_PCM_STREAM_CAPTURE:
889 if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) {
890 for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next) {
891 if (SUBSTREAM_BUSY(substream))
892 return -EAGAIN;
893 }
894 }
895 break;
896 default:
897 return -EINVAL;
898 }
899
Takashi Iwai0df63e42006-04-28 15:13:41 +0200900 if (file->f_flags & O_APPEND) {
901 if (prefer_subdevice < 0) {
902 if (pstr->substream_count > 1)
903 return -EINVAL; /* must be unique */
904 substream = pstr->substream;
905 } else {
906 for (substream = pstr->substream; substream;
907 substream = substream->next)
908 if (substream->number == prefer_subdevice)
909 break;
910 }
911 if (! substream)
912 return -ENODEV;
913 if (! SUBSTREAM_BUSY(substream))
914 return -EBADFD;
915 substream->ref_count++;
916 *rsubstream = substream;
917 return 0;
918 }
919
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 if (prefer_subdevice >= 0) {
921 for (substream = pstr->substream; substream; substream = substream->next)
922 if (!SUBSTREAM_BUSY(substream) && substream->number == prefer_subdevice)
923 goto __ok;
924 }
925 for (substream = pstr->substream; substream; substream = substream->next)
926 if (!SUBSTREAM_BUSY(substream))
927 break;
928 __ok:
929 if (substream == NULL)
930 return -EAGAIN;
931
Takashi Iwaica2c0962005-09-09 14:20:23 +0200932 runtime = kzalloc(sizeof(*runtime), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 if (runtime == NULL)
934 return -ENOMEM;
935
Takashi Iwai877211f2005-11-17 13:59:38 +0100936 size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 runtime->status = snd_malloc_pages(size, GFP_KERNEL);
938 if (runtime->status == NULL) {
939 kfree(runtime);
940 return -ENOMEM;
941 }
942 memset((void*)runtime->status, 0, size);
943
Takashi Iwai877211f2005-11-17 13:59:38 +0100944 size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 runtime->control = snd_malloc_pages(size, GFP_KERNEL);
946 if (runtime->control == NULL) {
Takashi Iwai877211f2005-11-17 13:59:38 +0100947 snd_free_pages((void*)runtime->status,
948 PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 kfree(runtime);
950 return -ENOMEM;
951 }
952 memset((void*)runtime->control, 0, size);
953
954 init_waitqueue_head(&runtime->sleep);
Jaroslav Kyselac91a9882010-01-21 10:32:15 +0100955 init_waitqueue_head(&runtime->tsleep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956
957 runtime->status->state = SNDRV_PCM_STATE_OPEN;
958
959 substream->runtime = runtime;
960 substream->private_data = pcm->private_data;
Takashi Iwai0df63e42006-04-28 15:13:41 +0200961 substream->ref_count = 1;
962 substream->f_flags = file->f_flags;
Clemens Ladische7373b72009-11-10 10:13:30 +0100963 substream->pid = get_pid(task_pid(current));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964 pstr->substream_opened++;
965 *rsubstream = substream;
966 return 0;
967}
968
Takashi Iwai3bf75f92006-03-27 16:40:49 +0200969void snd_pcm_detach_substream(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970{
Takashi Iwai877211f2005-11-17 13:59:38 +0100971 struct snd_pcm_runtime *runtime;
Takashi Iwai0df63e42006-04-28 15:13:41 +0200972
Takashi Iwai7eaa9432008-08-08 17:09:09 +0200973 if (PCM_RUNTIME_CHECK(substream))
974 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 if (runtime->private_free != NULL)
977 runtime->private_free(runtime);
Takashi Iwai877211f2005-11-17 13:59:38 +0100978 snd_free_pages((void*)runtime->status,
979 PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)));
980 snd_free_pages((void*)runtime->control,
981 PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982 kfree(runtime->hw_constraints.rules);
Jaroslav Kysela4d96eb22009-12-20 11:47:57 +0100983#ifdef CONFIG_SND_PCM_XRUN_DEBUG
984 if (runtime->hwptr_log)
985 kfree(runtime->hwptr_log);
986#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 kfree(runtime);
988 substream->runtime = NULL;
Clemens Ladische7373b72009-11-10 10:13:30 +0100989 put_pid(substream->pid);
990 substream->pid = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 substream->pstr->substream_opened--;
992}
993
Greg Kroah-Hartmand80f19f2006-08-07 22:19:37 -0700994static ssize_t show_pcm_class(struct device *dev,
995 struct device_attribute *attr, char *buf)
Takashi Iwai9d19f482006-09-06 14:27:46 +0200996{
997 struct snd_pcm *pcm;
998 const char *str;
999 static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = {
1000 [SNDRV_PCM_CLASS_GENERIC] = "generic",
1001 [SNDRV_PCM_CLASS_MULTI] = "multi",
1002 [SNDRV_PCM_CLASS_MODEM] = "modem",
1003 [SNDRV_PCM_CLASS_DIGITIZER] = "digitizer",
1004 };
1005
Greg Kroah-Hartmand80f19f2006-08-07 22:19:37 -07001006 if (! (pcm = dev_get_drvdata(dev)) ||
Takashi Iwai9d19f482006-09-06 14:27:46 +02001007 pcm->dev_class > SNDRV_PCM_CLASS_LAST)
1008 str = "none";
1009 else
1010 str = strs[pcm->dev_class];
1011 return snprintf(buf, PAGE_SIZE, "%s\n", str);
1012}
1013
Greg Kroah-Hartmand80f19f2006-08-07 22:19:37 -07001014static struct device_attribute pcm_attrs =
Takashi Iwai9d19f482006-09-06 14:27:46 +02001015 __ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL);
1016
Takashi Iwai877211f2005-11-17 13:59:38 +01001017static int snd_pcm_dev_register(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018{
Clemens Ladischf87135f2005-11-20 14:06:59 +01001019 int cidx, err;
Takashi Iwai877211f2005-11-17 13:59:38 +01001020 struct snd_pcm_substream *substream;
Johannes Berg9244b2c2006-10-05 16:02:22 +02001021 struct snd_pcm_notify *notify;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 char str[16];
Julia Lawall4b3be6a2009-10-17 08:33:22 +02001023 struct snd_pcm *pcm;
Johannes Bergc78085f2006-10-05 15:06:34 +02001024 struct device *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025
Julia Lawall4b3be6a2009-10-17 08:33:22 +02001026 if (snd_BUG_ON(!device || !device->device_data))
Takashi Iwai7eaa9432008-08-08 17:09:09 +02001027 return -ENXIO;
Julia Lawall4b3be6a2009-10-17 08:33:22 +02001028 pcm = device->device_data;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001029 mutex_lock(&register_mutex);
Pawel MOLLf90c06a2008-07-30 12:46:40 +01001030 err = snd_pcm_add(pcm);
1031 if (err) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001032 mutex_unlock(&register_mutex);
Pawel MOLLf90c06a2008-07-30 12:46:40 +01001033 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 for (cidx = 0; cidx < 2; cidx++) {
1036 int devtype = -1;
Liam Girdwood945e5032012-02-08 20:33:31 +00001037 if (pcm->streams[cidx].substream == NULL || pcm->internal)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 continue;
1039 switch (cidx) {
1040 case SNDRV_PCM_STREAM_PLAYBACK:
1041 sprintf(str, "pcmC%iD%ip", pcm->card->number, pcm->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK;
1043 break;
1044 case SNDRV_PCM_STREAM_CAPTURE:
1045 sprintf(str, "pcmC%iD%ic", pcm->card->number, pcm->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE;
1047 break;
1048 }
Johannes Bergc78085f2006-10-05 15:06:34 +02001049 /* device pointer to use, pcm->dev takes precedence if
1050 * it is assigned, otherwise fall back to card's device
1051 * if possible */
1052 dev = pcm->dev;
1053 if (!dev)
Takashi Iwaic2902c82007-02-09 16:25:48 +01001054 dev = snd_card_get_device_link(pcm->card);
Johannes Bergc78085f2006-10-05 15:06:34 +02001055 /* register pcm */
1056 err = snd_register_device_for_dev(devtype, pcm->card,
1057 pcm->device,
1058 &snd_pcm_f_ops[cidx],
1059 pcm, str, dev);
1060 if (err < 0) {
Clemens Ladischf87135f2005-11-20 14:06:59 +01001061 list_del(&pcm->list);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001062 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 return err;
1064 }
Takashi Iwai9d19f482006-09-06 14:27:46 +02001065 snd_add_device_sysfs_file(devtype, pcm->card, pcm->device,
1066 &pcm_attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 for (substream = pcm->streams[cidx].substream; substream; substream = substream->next)
1068 snd_pcm_timer_init(substream);
1069 }
Johannes Berg9244b2c2006-10-05 16:02:22 +02001070
1071 list_for_each_entry(notify, &snd_pcm_notify_list, list)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 notify->n_register(pcm);
Johannes Berg9244b2c2006-10-05 16:02:22 +02001073
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001074 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 return 0;
1076}
1077
Takashi Iwai877211f2005-11-17 13:59:38 +01001078static int snd_pcm_dev_disconnect(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079{
Takashi Iwai877211f2005-11-17 13:59:38 +01001080 struct snd_pcm *pcm = device->device_data;
Takashi Iwaic4614822006-06-23 14:38:23 +02001081 struct snd_pcm_notify *notify;
Takashi Iwai877211f2005-11-17 13:59:38 +01001082 struct snd_pcm_substream *substream;
Takashi Iwaic4614822006-06-23 14:38:23 +02001083 int cidx, devtype;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001085 mutex_lock(&register_mutex);
Takashi Iwaic4614822006-06-23 14:38:23 +02001086 if (list_empty(&pcm->list))
1087 goto unlock;
1088
Clemens Ladischf87135f2005-11-20 14:06:59 +01001089 list_del_init(&pcm->list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 for (cidx = 0; cidx < 2; cidx++)
1091 for (substream = pcm->streams[cidx].substream; substream; substream = substream->next)
1092 if (substream->runtime)
1093 substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED;
Takashi Iwaic4614822006-06-23 14:38:23 +02001094 list_for_each_entry(notify, &snd_pcm_notify_list, list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 notify->n_disconnect(pcm);
1096 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 for (cidx = 0; cidx < 2; cidx++) {
1098 devtype = -1;
1099 switch (cidx) {
1100 case SNDRV_PCM_STREAM_PLAYBACK:
1101 devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK;
1102 break;
1103 case SNDRV_PCM_STREAM_CAPTURE:
1104 devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE;
1105 break;
1106 }
1107 snd_unregister_device(devtype, pcm->card, pcm->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 }
Takashi Iwaic4614822006-06-23 14:38:23 +02001109 unlock:
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001110 mutex_unlock(&register_mutex);
Takashi Iwaic4614822006-06-23 14:38:23 +02001111 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112}
1113
Takashi Iwai877211f2005-11-17 13:59:38 +01001114int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115{
Johannes Berg9244b2c2006-10-05 16:02:22 +02001116 struct snd_pcm *pcm;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117
Takashi Iwai7eaa9432008-08-08 17:09:09 +02001118 if (snd_BUG_ON(!notify ||
1119 !notify->n_register ||
1120 !notify->n_unregister ||
1121 !notify->n_disconnect))
1122 return -EINVAL;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001123 mutex_lock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 if (nfree) {
1125 list_del(&notify->list);
Johannes Berg9244b2c2006-10-05 16:02:22 +02001126 list_for_each_entry(pcm, &snd_pcm_devices, list)
1127 notify->n_unregister(pcm);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128 } else {
1129 list_add_tail(&notify->list, &snd_pcm_notify_list);
Johannes Berg9244b2c2006-10-05 16:02:22 +02001130 list_for_each_entry(pcm, &snd_pcm_devices, list)
1131 notify->n_register(pcm);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001133 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 return 0;
1135}
1136
Takashi Iwaie88e8ae62006-04-28 15:13:40 +02001137EXPORT_SYMBOL(snd_pcm_notify);
1138
Takashi Iwaie28563c2005-12-01 10:42:42 +01001139#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140/*
1141 * Info interface
1142 */
1143
Takashi Iwai877211f2005-11-17 13:59:38 +01001144static void snd_pcm_proc_read(struct snd_info_entry *entry,
1145 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146{
Takashi Iwai877211f2005-11-17 13:59:38 +01001147 struct snd_pcm *pcm;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001149 mutex_lock(&register_mutex);
Johannes Berg9244b2c2006-10-05 16:02:22 +02001150 list_for_each_entry(pcm, &snd_pcm_devices, list) {
Clemens Ladischf87135f2005-11-20 14:06:59 +01001151 snd_iprintf(buffer, "%02i-%02i: %s : %s",
1152 pcm->card->number, pcm->device, pcm->id, pcm->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153 if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream)
Takashi Iwai877211f2005-11-17 13:59:38 +01001154 snd_iprintf(buffer, " : playback %i",
1155 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream)
Takashi Iwai877211f2005-11-17 13:59:38 +01001157 snd_iprintf(buffer, " : capture %i",
1158 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001159 snd_iprintf(buffer, "\n");
1160 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001161 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162}
1163
Takashi Iwai6581f4e2006-05-17 17:14:51 +02001164static struct snd_info_entry *snd_pcm_proc_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165
Takashi Iwaie28563c2005-12-01 10:42:42 +01001166static void snd_pcm_proc_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167{
Takashi Iwai877211f2005-11-17 13:59:38 +01001168 struct snd_info_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170 if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) {
Takashi Iwaibf850202006-04-28 15:13:41 +02001171 snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172 if (snd_info_register(entry) < 0) {
1173 snd_info_free_entry(entry);
1174 entry = NULL;
1175 }
1176 }
1177 snd_pcm_proc_entry = entry;
Takashi Iwaie28563c2005-12-01 10:42:42 +01001178}
1179
1180static void snd_pcm_proc_done(void)
1181{
Takashi Iwai746d4a02006-06-23 14:37:59 +02001182 snd_info_free_entry(snd_pcm_proc_entry);
Takashi Iwaie28563c2005-12-01 10:42:42 +01001183}
1184
1185#else /* !CONFIG_PROC_FS */
1186#define snd_pcm_proc_init()
1187#define snd_pcm_proc_done()
1188#endif /* CONFIG_PROC_FS */
1189
1190
1191/*
1192 * ENTRY functions
1193 */
1194
1195static int __init alsa_pcm_init(void)
1196{
1197 snd_ctl_register_ioctl(snd_pcm_control_ioctl);
1198 snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl);
1199 snd_pcm_proc_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200 return 0;
1201}
1202
1203static void __exit alsa_pcm_exit(void)
1204{
1205 snd_ctl_unregister_ioctl(snd_pcm_control_ioctl);
1206 snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl);
Takashi Iwaie28563c2005-12-01 10:42:42 +01001207 snd_pcm_proc_done();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208}
1209
1210module_init(alsa_pcm_init)
1211module_exit(alsa_pcm_exit)