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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Digital Audio (PCM) abstract layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
1da177e4 LT |
22 | #include <linux/init.h> |
23 | #include <linux/slab.h> | |
da155d5b | 24 | #include <linux/module.h> |
1da177e4 | 25 | #include <linux/time.h> |
1a60d4c5 | 26 | #include <linux/mutex.h> |
51990e82 | 27 | #include <linux/device.h> |
cc07b298 | 28 | #include <linux/nospec.h> |
1da177e4 LT |
29 | #include <sound/core.h> |
30 | #include <sound/minors.h> | |
31 | #include <sound/pcm.h> | |
08b8768e | 32 | #include <sound/timer.h> |
1da177e4 LT |
33 | #include <sound/control.h> |
34 | #include <sound/info.h> | |
35 | ||
2c4842d3 TS |
36 | #include "pcm_local.h" |
37 | ||
c1017a4c | 38 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); |
1da177e4 LT |
39 | MODULE_DESCRIPTION("Midlevel PCM code for ALSA."); |
40 | MODULE_LICENSE("GPL"); | |
41 | ||
f87135f5 | 42 | static LIST_HEAD(snd_pcm_devices); |
1a60d4c5 | 43 | static DEFINE_MUTEX(register_mutex); |
58f30d65 TI |
44 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
45 | static LIST_HEAD(snd_pcm_notify_list); | |
46 | #endif | |
1da177e4 | 47 | |
877211f5 TI |
48 | static int snd_pcm_free(struct snd_pcm *pcm); |
49 | static int snd_pcm_dev_free(struct snd_device *device); | |
50 | static int snd_pcm_dev_register(struct snd_device *device); | |
51 | static int snd_pcm_dev_disconnect(struct snd_device *device); | |
1da177e4 | 52 | |
f90c06a2 | 53 | static struct snd_pcm *snd_pcm_get(struct snd_card *card, int device) |
f87135f5 | 54 | { |
f87135f5 CL |
55 | struct snd_pcm *pcm; |
56 | ||
9244b2c3 | 57 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
f87135f5 CL |
58 | if (pcm->card == card && pcm->device == device) |
59 | return pcm; | |
60 | } | |
61 | return NULL; | |
62 | } | |
63 | ||
f90c06a2 PM |
64 | static int snd_pcm_next(struct snd_card *card, int device) |
65 | { | |
66 | struct snd_pcm *pcm; | |
67 | ||
68 | list_for_each_entry(pcm, &snd_pcm_devices, list) { | |
69 | if (pcm->card == card && pcm->device > device) | |
70 | return pcm->device; | |
71 | else if (pcm->card->number > card->number) | |
72 | return -1; | |
73 | } | |
74 | return -1; | |
75 | } | |
76 | ||
77 | static int snd_pcm_add(struct snd_pcm *newpcm) | |
78 | { | |
79 | struct snd_pcm *pcm; | |
80 | ||
b95bd3a4 TI |
81 | if (newpcm->internal) |
82 | return 0; | |
83 | ||
f90c06a2 PM |
84 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
85 | if (pcm->card == newpcm->card && pcm->device == newpcm->device) | |
86 | return -EBUSY; | |
87 | if (pcm->card->number > newpcm->card->number || | |
88 | (pcm->card == newpcm->card && | |
89 | pcm->device > newpcm->device)) { | |
90 | list_add(&newpcm->list, pcm->list.prev); | |
91 | return 0; | |
92 | } | |
93 | } | |
94 | list_add_tail(&newpcm->list, &snd_pcm_devices); | |
95 | return 0; | |
96 | } | |
97 | ||
877211f5 TI |
98 | static int snd_pcm_control_ioctl(struct snd_card *card, |
99 | struct snd_ctl_file *control, | |
1da177e4 LT |
100 | unsigned int cmd, unsigned long arg) |
101 | { | |
1da177e4 LT |
102 | switch (cmd) { |
103 | case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE: | |
104 | { | |
105 | int device; | |
106 | ||
107 | if (get_user(device, (int __user *)arg)) | |
108 | return -EFAULT; | |
1a60d4c5 | 109 | mutex_lock(®ister_mutex); |
f90c06a2 | 110 | device = snd_pcm_next(card, device); |
1a60d4c5 | 111 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
112 | if (put_user(device, (int __user *)arg)) |
113 | return -EFAULT; | |
114 | return 0; | |
115 | } | |
116 | case SNDRV_CTL_IOCTL_PCM_INFO: | |
117 | { | |
877211f5 | 118 | struct snd_pcm_info __user *info; |
1da177e4 | 119 | unsigned int device, subdevice; |
877211f5 TI |
120 | int stream; |
121 | struct snd_pcm *pcm; | |
122 | struct snd_pcm_str *pstr; | |
123 | struct snd_pcm_substream *substream; | |
f87135f5 CL |
124 | int err; |
125 | ||
877211f5 | 126 | info = (struct snd_pcm_info __user *)arg; |
1da177e4 LT |
127 | if (get_user(device, &info->device)) |
128 | return -EFAULT; | |
1da177e4 LT |
129 | if (get_user(stream, &info->stream)) |
130 | return -EFAULT; | |
131 | if (stream < 0 || stream > 1) | |
132 | return -EINVAL; | |
cc07b298 | 133 | stream = array_index_nospec(stream, 2); |
1da177e4 LT |
134 | if (get_user(subdevice, &info->subdevice)) |
135 | return -EFAULT; | |
1a60d4c5 | 136 | mutex_lock(®ister_mutex); |
f90c06a2 | 137 | pcm = snd_pcm_get(card, device); |
f87135f5 CL |
138 | if (pcm == NULL) { |
139 | err = -ENXIO; | |
140 | goto _error; | |
141 | } | |
142 | pstr = &pcm->streams[stream]; | |
143 | if (pstr->substream_count == 0) { | |
144 | err = -ENOENT; | |
145 | goto _error; | |
146 | } | |
147 | if (subdevice >= pstr->substream_count) { | |
148 | err = -ENXIO; | |
149 | goto _error; | |
150 | } | |
151 | for (substream = pstr->substream; substream; | |
152 | substream = substream->next) | |
1da177e4 LT |
153 | if (substream->number == (int)subdevice) |
154 | break; | |
f87135f5 CL |
155 | if (substream == NULL) { |
156 | err = -ENXIO; | |
157 | goto _error; | |
158 | } | |
362bca57 | 159 | mutex_lock(&pcm->open_mutex); |
f87135f5 | 160 | err = snd_pcm_info_user(substream, info); |
362bca57 | 161 | mutex_unlock(&pcm->open_mutex); |
f87135f5 | 162 | _error: |
1a60d4c5 | 163 | mutex_unlock(®ister_mutex); |
f87135f5 | 164 | return err; |
1da177e4 LT |
165 | } |
166 | case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE: | |
167 | { | |
168 | int val; | |
169 | ||
170 | if (get_user(val, (int __user *)arg)) | |
171 | return -EFAULT; | |
23c18d4b | 172 | control->preferred_subdevice[SND_CTL_SUBDEV_PCM] = val; |
1da177e4 LT |
173 | return 0; |
174 | } | |
175 | } | |
176 | return -ENOIOCTLCMD; | |
177 | } | |
21a3479a | 178 | |
1da177e4 | 179 | #define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v |
1da177e4 | 180 | |
1da177e4 LT |
181 | static char *snd_pcm_format_names[] = { |
182 | FORMAT(S8), | |
183 | FORMAT(U8), | |
184 | FORMAT(S16_LE), | |
185 | FORMAT(S16_BE), | |
186 | FORMAT(U16_LE), | |
187 | FORMAT(U16_BE), | |
188 | FORMAT(S24_LE), | |
189 | FORMAT(S24_BE), | |
190 | FORMAT(U24_LE), | |
191 | FORMAT(U24_BE), | |
192 | FORMAT(S32_LE), | |
193 | FORMAT(S32_BE), | |
194 | FORMAT(U32_LE), | |
195 | FORMAT(U32_BE), | |
196 | FORMAT(FLOAT_LE), | |
197 | FORMAT(FLOAT_BE), | |
198 | FORMAT(FLOAT64_LE), | |
199 | FORMAT(FLOAT64_BE), | |
200 | FORMAT(IEC958_SUBFRAME_LE), | |
201 | FORMAT(IEC958_SUBFRAME_BE), | |
202 | FORMAT(MU_LAW), | |
203 | FORMAT(A_LAW), | |
204 | FORMAT(IMA_ADPCM), | |
205 | FORMAT(MPEG), | |
206 | FORMAT(GSM), | |
207 | FORMAT(SPECIAL), | |
208 | FORMAT(S24_3LE), | |
209 | FORMAT(S24_3BE), | |
210 | FORMAT(U24_3LE), | |
211 | FORMAT(U24_3BE), | |
212 | FORMAT(S20_3LE), | |
213 | FORMAT(S20_3BE), | |
214 | FORMAT(U20_3LE), | |
215 | FORMAT(U20_3BE), | |
216 | FORMAT(S18_3LE), | |
217 | FORMAT(S18_3BE), | |
218 | FORMAT(U18_3LE), | |
219 | FORMAT(U18_3BE), | |
7a28826a DC |
220 | FORMAT(G723_24), |
221 | FORMAT(G723_24_1B), | |
222 | FORMAT(G723_40), | |
223 | FORMAT(G723_40_1B), | |
ef7a4f97 DM |
224 | FORMAT(DSD_U8), |
225 | FORMAT(DSD_U16_LE), | |
d4288d3f | 226 | FORMAT(DSD_U32_LE), |
d42472ec JL |
227 | FORMAT(DSD_U16_BE), |
228 | FORMAT(DSD_U32_BE), | |
1da177e4 LT |
229 | }; |
230 | ||
30b771cf TI |
231 | /** |
232 | * snd_pcm_format_name - Return a name string for the given PCM format | |
233 | * @format: PCM format | |
234 | */ | |
6e5265ec | 235 | const char *snd_pcm_format_name(snd_pcm_format_t format) |
e28563cc | 236 | { |
fea952e5 | 237 | if ((__force unsigned int)format >= ARRAY_SIZE(snd_pcm_format_names)) |
7a28826a | 238 | return "Unknown"; |
fea952e5 | 239 | return snd_pcm_format_names[(__force unsigned int)format]; |
e28563cc | 240 | } |
6e5265ec TI |
241 | EXPORT_SYMBOL_GPL(snd_pcm_format_name); |
242 | ||
243 | #ifdef CONFIG_SND_VERBOSE_PROCFS | |
244 | ||
245 | #define STATE(v) [SNDRV_PCM_STATE_##v] = #v | |
246 | #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v | |
247 | #define READY(v) [SNDRV_PCM_READY_##v] = #v | |
248 | #define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v | |
249 | #define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v | |
250 | #define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v | |
251 | #define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v | |
252 | #define START(v) [SNDRV_PCM_START_##v] = #v | |
253 | #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v | |
e28563cc | 254 | |
e28563cc TI |
255 | static char *snd_pcm_stream_names[] = { |
256 | STREAM(PLAYBACK), | |
257 | STREAM(CAPTURE), | |
258 | }; | |
259 | ||
260 | static char *snd_pcm_state_names[] = { | |
261 | STATE(OPEN), | |
262 | STATE(SETUP), | |
263 | STATE(PREPARED), | |
264 | STATE(RUNNING), | |
265 | STATE(XRUN), | |
266 | STATE(DRAINING), | |
267 | STATE(PAUSED), | |
268 | STATE(SUSPENDED), | |
269 | }; | |
270 | ||
271 | static char *snd_pcm_access_names[] = { | |
272 | ACCESS(MMAP_INTERLEAVED), | |
273 | ACCESS(MMAP_NONINTERLEAVED), | |
274 | ACCESS(MMAP_COMPLEX), | |
275 | ACCESS(RW_INTERLEAVED), | |
276 | ACCESS(RW_NONINTERLEAVED), | |
277 | }; | |
278 | ||
1da177e4 LT |
279 | static char *snd_pcm_subformat_names[] = { |
280 | SUBFORMAT(STD), | |
281 | }; | |
282 | ||
283 | static char *snd_pcm_tstamp_mode_names[] = { | |
284 | TSTAMP(NONE), | |
8c121586 | 285 | TSTAMP(ENABLE), |
1da177e4 LT |
286 | }; |
287 | ||
877211f5 | 288 | static const char *snd_pcm_stream_name(int stream) |
1da177e4 | 289 | { |
1da177e4 LT |
290 | return snd_pcm_stream_names[stream]; |
291 | } | |
292 | ||
293 | static const char *snd_pcm_access_name(snd_pcm_access_t access) | |
294 | { | |
fea952e5 | 295 | return snd_pcm_access_names[(__force int)access]; |
1da177e4 LT |
296 | } |
297 | ||
1da177e4 LT |
298 | static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat) |
299 | { | |
fea952e5 | 300 | return snd_pcm_subformat_names[(__force int)subformat]; |
1da177e4 LT |
301 | } |
302 | ||
877211f5 | 303 | static const char *snd_pcm_tstamp_mode_name(int mode) |
1da177e4 | 304 | { |
1da177e4 LT |
305 | return snd_pcm_tstamp_mode_names[mode]; |
306 | } | |
307 | ||
308 | static const char *snd_pcm_state_name(snd_pcm_state_t state) | |
309 | { | |
fea952e5 | 310 | return snd_pcm_state_names[(__force int)state]; |
1da177e4 LT |
311 | } |
312 | ||
8eeaa2f9 | 313 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 | 314 | #include <linux/soundcard.h> |
1a60d4c5 | 315 | |
1da177e4 LT |
316 | static const char *snd_pcm_oss_format_name(int format) |
317 | { | |
318 | switch (format) { | |
319 | case AFMT_MU_LAW: | |
320 | return "MU_LAW"; | |
321 | case AFMT_A_LAW: | |
322 | return "A_LAW"; | |
323 | case AFMT_IMA_ADPCM: | |
324 | return "IMA_ADPCM"; | |
325 | case AFMT_U8: | |
326 | return "U8"; | |
327 | case AFMT_S16_LE: | |
328 | return "S16_LE"; | |
329 | case AFMT_S16_BE: | |
330 | return "S16_BE"; | |
331 | case AFMT_S8: | |
332 | return "S8"; | |
333 | case AFMT_U16_LE: | |
334 | return "U16_LE"; | |
335 | case AFMT_U16_BE: | |
336 | return "U16_BE"; | |
337 | case AFMT_MPEG: | |
338 | return "MPEG"; | |
339 | default: | |
340 | return "unknown"; | |
341 | } | |
342 | } | |
343 | #endif | |
344 | ||
877211f5 TI |
345 | static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, |
346 | struct snd_info_buffer *buffer) | |
1da177e4 | 347 | { |
877211f5 | 348 | struct snd_pcm_info *info; |
1da177e4 LT |
349 | int err; |
350 | ||
7c22f1aa TI |
351 | if (! substream) |
352 | return; | |
1da177e4 LT |
353 | |
354 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
ec0e9937 | 355 | if (!info) |
1da177e4 | 356 | return; |
1da177e4 LT |
357 | |
358 | err = snd_pcm_info(substream, info); | |
359 | if (err < 0) { | |
360 | snd_iprintf(buffer, "error %d\n", err); | |
361 | kfree(info); | |
362 | return; | |
363 | } | |
364 | snd_iprintf(buffer, "card: %d\n", info->card); | |
365 | snd_iprintf(buffer, "device: %d\n", info->device); | |
366 | snd_iprintf(buffer, "subdevice: %d\n", info->subdevice); | |
367 | snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream)); | |
368 | snd_iprintf(buffer, "id: %s\n", info->id); | |
369 | snd_iprintf(buffer, "name: %s\n", info->name); | |
370 | snd_iprintf(buffer, "subname: %s\n", info->subname); | |
371 | snd_iprintf(buffer, "class: %d\n", info->dev_class); | |
372 | snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); | |
373 | snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); | |
374 | snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); | |
375 | kfree(info); | |
376 | } | |
377 | ||
877211f5 TI |
378 | static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry, |
379 | struct snd_info_buffer *buffer) | |
1da177e4 | 380 | { |
877211f5 TI |
381 | snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream, |
382 | buffer); | |
1da177e4 LT |
383 | } |
384 | ||
877211f5 TI |
385 | static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry, |
386 | struct snd_info_buffer *buffer) | |
1da177e4 | 387 | { |
9fe856e4 | 388 | snd_pcm_proc_info_read(entry->private_data, buffer); |
1da177e4 LT |
389 | } |
390 | ||
877211f5 TI |
391 | static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry, |
392 | struct snd_info_buffer *buffer) | |
1da177e4 | 393 | { |
877211f5 | 394 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 TI |
395 | struct snd_pcm_runtime *runtime; |
396 | ||
397 | mutex_lock(&substream->pcm->open_mutex); | |
398 | runtime = substream->runtime; | |
1da177e4 LT |
399 | if (!runtime) { |
400 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 401 | goto unlock; |
1da177e4 | 402 | } |
1da177e4 LT |
403 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
404 | snd_iprintf(buffer, "no setup\n"); | |
901d46d5 | 405 | goto unlock; |
1da177e4 LT |
406 | } |
407 | snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); | |
408 | snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); | |
409 | snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat)); | |
410 | snd_iprintf(buffer, "channels: %u\n", runtime->channels); | |
411 | snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den); | |
412 | snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size); | |
413 | snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size); | |
8eeaa2f9 | 414 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
415 | if (substream->oss.oss) { |
416 | snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format)); | |
417 | snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels); | |
418 | snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate); | |
419 | snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes); | |
420 | snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods); | |
421 | snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); | |
422 | } | |
423 | #endif | |
901d46d5 TI |
424 | unlock: |
425 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 LT |
426 | } |
427 | ||
877211f5 TI |
428 | static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, |
429 | struct snd_info_buffer *buffer) | |
1da177e4 | 430 | { |
877211f5 | 431 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 TI |
432 | struct snd_pcm_runtime *runtime; |
433 | ||
434 | mutex_lock(&substream->pcm->open_mutex); | |
435 | runtime = substream->runtime; | |
1da177e4 LT |
436 | if (!runtime) { |
437 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 438 | goto unlock; |
1da177e4 | 439 | } |
1da177e4 LT |
440 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
441 | snd_iprintf(buffer, "no setup\n"); | |
901d46d5 | 442 | goto unlock; |
1da177e4 LT |
443 | } |
444 | snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); | |
445 | snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); | |
1da177e4 | 446 | snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min); |
1da177e4 LT |
447 | snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold); |
448 | snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold); | |
449 | snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); | |
450 | snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); | |
451 | snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); | |
901d46d5 TI |
452 | unlock: |
453 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 LT |
454 | } |
455 | ||
877211f5 TI |
456 | static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, |
457 | struct snd_info_buffer *buffer) | |
1da177e4 | 458 | { |
877211f5 | 459 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 | 460 | struct snd_pcm_runtime *runtime; |
877211f5 | 461 | struct snd_pcm_status status; |
1da177e4 | 462 | int err; |
901d46d5 TI |
463 | |
464 | mutex_lock(&substream->pcm->open_mutex); | |
465 | runtime = substream->runtime; | |
1da177e4 LT |
466 | if (!runtime) { |
467 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 468 | goto unlock; |
1da177e4 LT |
469 | } |
470 | memset(&status, 0, sizeof(status)); | |
471 | err = snd_pcm_status(substream, &status); | |
472 | if (err < 0) { | |
473 | snd_iprintf(buffer, "error %d\n", err); | |
901d46d5 | 474 | goto unlock; |
1da177e4 LT |
475 | } |
476 | snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); | |
e7373b70 | 477 | snd_iprintf(buffer, "owner_pid : %d\n", pid_vnr(substream->pid)); |
1da177e4 LT |
478 | snd_iprintf(buffer, "trigger_time: %ld.%09ld\n", |
479 | status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec); | |
480 | snd_iprintf(buffer, "tstamp : %ld.%09ld\n", | |
481 | status.tstamp.tv_sec, status.tstamp.tv_nsec); | |
482 | snd_iprintf(buffer, "delay : %ld\n", status.delay); | |
483 | snd_iprintf(buffer, "avail : %ld\n", status.avail); | |
484 | snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max); | |
485 | snd_iprintf(buffer, "-----\n"); | |
486 | snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); | |
487 | snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); | |
901d46d5 TI |
488 | unlock: |
489 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 | 490 | } |
1da177e4 | 491 | |
61fb63c0 | 492 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
2b30d411 TI |
493 | static void snd_pcm_xrun_injection_write(struct snd_info_entry *entry, |
494 | struct snd_info_buffer *buffer) | |
495 | { | |
496 | struct snd_pcm_substream *substream = entry->private_data; | |
497 | struct snd_pcm_runtime *runtime; | |
498 | ||
499 | snd_pcm_stream_lock_irq(substream); | |
500 | runtime = substream->runtime; | |
501 | if (runtime && runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
502 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
503 | snd_pcm_stream_unlock_irq(substream); | |
504 | } | |
505 | ||
877211f5 TI |
506 | static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry, |
507 | struct snd_info_buffer *buffer) | |
1da177e4 | 508 | { |
877211f5 | 509 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
510 | snd_iprintf(buffer, "%d\n", pstr->xrun_debug); |
511 | } | |
512 | ||
877211f5 TI |
513 | static void snd_pcm_xrun_debug_write(struct snd_info_entry *entry, |
514 | struct snd_info_buffer *buffer) | |
1da177e4 | 515 | { |
877211f5 | 516 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
517 | char line[64]; |
518 | if (!snd_info_get_line(buffer, line, sizeof(line))) | |
519 | pstr->xrun_debug = simple_strtoul(line, NULL, 10); | |
520 | } | |
521 | #endif | |
522 | ||
877211f5 | 523 | static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) |
1da177e4 | 524 | { |
877211f5 TI |
525 | struct snd_pcm *pcm = pstr->pcm; |
526 | struct snd_info_entry *entry; | |
1da177e4 LT |
527 | char name[16]; |
528 | ||
529 | sprintf(name, "pcm%i%c", pcm->device, | |
530 | pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); | |
c8da9be4 ME |
531 | entry = snd_info_create_card_entry(pcm->card, name, |
532 | pcm->card->proc_root); | |
533 | if (!entry) | |
1da177e4 LT |
534 | return -ENOMEM; |
535 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
536 | if (snd_info_register(entry) < 0) { | |
537 | snd_info_free_entry(entry); | |
538 | return -ENOMEM; | |
539 | } | |
540 | pstr->proc_root = entry; | |
c8da9be4 ME |
541 | entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root); |
542 | if (entry) { | |
bf850204 | 543 | snd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read); |
1da177e4 LT |
544 | if (snd_info_register(entry) < 0) { |
545 | snd_info_free_entry(entry); | |
546 | entry = NULL; | |
547 | } | |
548 | } | |
549 | pstr->proc_info_entry = entry; | |
550 | ||
61fb63c0 | 551 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
c8da9be4 ME |
552 | entry = snd_info_create_card_entry(pcm->card, "xrun_debug", |
553 | pstr->proc_root); | |
554 | if (entry) { | |
1da177e4 | 555 | entry->c.text.read = snd_pcm_xrun_debug_read; |
1da177e4 | 556 | entry->c.text.write = snd_pcm_xrun_debug_write; |
bd7bf042 | 557 | entry->mode |= S_IWUSR; |
1da177e4 LT |
558 | entry->private_data = pstr; |
559 | if (snd_info_register(entry) < 0) { | |
560 | snd_info_free_entry(entry); | |
561 | entry = NULL; | |
562 | } | |
563 | } | |
564 | pstr->proc_xrun_debug_entry = entry; | |
565 | #endif | |
566 | return 0; | |
567 | } | |
568 | ||
877211f5 | 569 | static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) |
1da177e4 | 570 | { |
61fb63c0 | 571 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
746d4a02 TI |
572 | snd_info_free_entry(pstr->proc_xrun_debug_entry); |
573 | pstr->proc_xrun_debug_entry = NULL; | |
1da177e4 | 574 | #endif |
746d4a02 TI |
575 | snd_info_free_entry(pstr->proc_info_entry); |
576 | pstr->proc_info_entry = NULL; | |
577 | snd_info_free_entry(pstr->proc_root); | |
578 | pstr->proc_root = NULL; | |
1da177e4 LT |
579 | return 0; |
580 | } | |
581 | ||
877211f5 | 582 | static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) |
1da177e4 | 583 | { |
877211f5 TI |
584 | struct snd_info_entry *entry; |
585 | struct snd_card *card; | |
1da177e4 LT |
586 | char name[16]; |
587 | ||
588 | card = substream->pcm->card; | |
589 | ||
590 | sprintf(name, "sub%i", substream->number); | |
c8da9be4 ME |
591 | entry = snd_info_create_card_entry(card, name, |
592 | substream->pstr->proc_root); | |
593 | if (!entry) | |
1da177e4 LT |
594 | return -ENOMEM; |
595 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
596 | if (snd_info_register(entry) < 0) { | |
597 | snd_info_free_entry(entry); | |
598 | return -ENOMEM; | |
599 | } | |
600 | substream->proc_root = entry; | |
c8da9be4 ME |
601 | entry = snd_info_create_card_entry(card, "info", substream->proc_root); |
602 | if (entry) { | |
bf850204 TI |
603 | snd_info_set_text_ops(entry, substream, |
604 | snd_pcm_substream_proc_info_read); | |
1da177e4 LT |
605 | if (snd_info_register(entry) < 0) { |
606 | snd_info_free_entry(entry); | |
607 | entry = NULL; | |
608 | } | |
609 | } | |
610 | substream->proc_info_entry = entry; | |
c8da9be4 ME |
611 | entry = snd_info_create_card_entry(card, "hw_params", |
612 | substream->proc_root); | |
613 | if (entry) { | |
bf850204 TI |
614 | snd_info_set_text_ops(entry, substream, |
615 | snd_pcm_substream_proc_hw_params_read); | |
1da177e4 LT |
616 | if (snd_info_register(entry) < 0) { |
617 | snd_info_free_entry(entry); | |
618 | entry = NULL; | |
619 | } | |
620 | } | |
621 | substream->proc_hw_params_entry = entry; | |
c8da9be4 ME |
622 | entry = snd_info_create_card_entry(card, "sw_params", |
623 | substream->proc_root); | |
624 | if (entry) { | |
bf850204 TI |
625 | snd_info_set_text_ops(entry, substream, |
626 | snd_pcm_substream_proc_sw_params_read); | |
1da177e4 LT |
627 | if (snd_info_register(entry) < 0) { |
628 | snd_info_free_entry(entry); | |
629 | entry = NULL; | |
630 | } | |
631 | } | |
632 | substream->proc_sw_params_entry = entry; | |
e6b4c525 TI |
633 | entry = snd_info_create_card_entry(card, "status", |
634 | substream->proc_root); | |
c8da9be4 | 635 | if (entry) { |
bf850204 TI |
636 | snd_info_set_text_ops(entry, substream, |
637 | snd_pcm_substream_proc_status_read); | |
1da177e4 LT |
638 | if (snd_info_register(entry) < 0) { |
639 | snd_info_free_entry(entry); | |
640 | entry = NULL; | |
641 | } | |
642 | } | |
643 | substream->proc_status_entry = entry; | |
644 | ||
2b30d411 TI |
645 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
646 | entry = snd_info_create_card_entry(card, "xrun_injection", | |
647 | substream->proc_root); | |
648 | if (entry) { | |
649 | entry->private_data = substream; | |
650 | entry->c.text.read = NULL; | |
651 | entry->c.text.write = snd_pcm_xrun_injection_write; | |
652 | entry->mode = S_IFREG | S_IWUSR; | |
653 | if (snd_info_register(entry) < 0) { | |
654 | snd_info_free_entry(entry); | |
655 | entry = NULL; | |
656 | } | |
657 | } | |
658 | substream->proc_xrun_injection_entry = entry; | |
659 | #endif /* CONFIG_SND_PCM_XRUN_DEBUG */ | |
660 | ||
1da177e4 LT |
661 | return 0; |
662 | } | |
746d4a02 | 663 | |
877211f5 | 664 | static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) |
1da177e4 | 665 | { |
746d4a02 TI |
666 | snd_info_free_entry(substream->proc_info_entry); |
667 | substream->proc_info_entry = NULL; | |
668 | snd_info_free_entry(substream->proc_hw_params_entry); | |
669 | substream->proc_hw_params_entry = NULL; | |
670 | snd_info_free_entry(substream->proc_sw_params_entry); | |
671 | substream->proc_sw_params_entry = NULL; | |
672 | snd_info_free_entry(substream->proc_status_entry); | |
673 | substream->proc_status_entry = NULL; | |
2b30d411 TI |
674 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
675 | snd_info_free_entry(substream->proc_xrun_injection_entry); | |
676 | substream->proc_xrun_injection_entry = NULL; | |
677 | #endif | |
746d4a02 TI |
678 | snd_info_free_entry(substream->proc_root); |
679 | substream->proc_root = NULL; | |
1da177e4 LT |
680 | return 0; |
681 | } | |
b7d90a35 | 682 | #else /* !CONFIG_SND_VERBOSE_PROCFS */ |
e28563cc TI |
683 | static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; } |
684 | static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; } | |
685 | static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; } | |
686 | static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; } | |
b7d90a35 | 687 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
1da177e4 | 688 | |
ef46c7af TI |
689 | static const struct attribute_group *pcm_dev_attr_groups[]; |
690 | ||
1da177e4 LT |
691 | /** |
692 | * snd_pcm_new_stream - create a new PCM stream | |
693 | * @pcm: the pcm instance | |
694 | * @stream: the stream direction, SNDRV_PCM_STREAM_XXX | |
695 | * @substream_count: the number of substreams | |
696 | * | |
697 | * Creates a new stream for the pcm. | |
698 | * The corresponding stream on the pcm must have been empty before | |
699 | * calling this, i.e. zero must be given to the argument of | |
700 | * snd_pcm_new(). | |
701 | * | |
eb7c06e8 | 702 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 703 | */ |
877211f5 | 704 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count) |
1da177e4 LT |
705 | { |
706 | int idx, err; | |
877211f5 TI |
707 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
708 | struct snd_pcm_substream *substream, *prev; | |
1da177e4 | 709 | |
8eeaa2f9 | 710 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1a60d4c5 | 711 | mutex_init(&pstr->oss.setup_mutex); |
1da177e4 LT |
712 | #endif |
713 | pstr->stream = stream; | |
714 | pstr->pcm = pcm; | |
715 | pstr->substream_count = substream_count; | |
ef46c7af TI |
716 | if (!substream_count) |
717 | return 0; | |
718 | ||
719 | snd_device_initialize(&pstr->dev, pcm->card); | |
720 | pstr->dev.groups = pcm_dev_attr_groups; | |
721 | dev_set_name(&pstr->dev, "pcmC%iD%i%c", pcm->card->number, pcm->device, | |
722 | stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); | |
723 | ||
724 | if (!pcm->internal) { | |
1da177e4 | 725 | err = snd_pcm_stream_proc_init(pstr); |
73e77ba0 | 726 | if (err < 0) { |
09e56df8 | 727 | pcm_err(pcm, "Error in snd_pcm_stream_proc_init\n"); |
1da177e4 | 728 | return err; |
73e77ba0 | 729 | } |
1da177e4 LT |
730 | } |
731 | prev = NULL; | |
732 | for (idx = 0, prev = NULL; idx < substream_count; idx++) { | |
ca2c0966 | 733 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
ec0e9937 | 734 | if (!substream) |
1da177e4 LT |
735 | return -ENOMEM; |
736 | substream->pcm = pcm; | |
737 | substream->pstr = pstr; | |
738 | substream->number = idx; | |
739 | substream->stream = stream; | |
740 | sprintf(substream->name, "subdevice #%i", idx); | |
741 | substream->buffer_bytes_max = UINT_MAX; | |
742 | if (prev == NULL) | |
743 | pstr->substream = substream; | |
744 | else | |
745 | prev->next = substream; | |
945e5038 LG |
746 | |
747 | if (!pcm->internal) { | |
748 | err = snd_pcm_substream_proc_init(substream); | |
749 | if (err < 0) { | |
09e56df8 TI |
750 | pcm_err(pcm, |
751 | "Error in snd_pcm_stream_proc_init\n"); | |
945e5038 LG |
752 | if (prev == NULL) |
753 | pstr->substream = NULL; | |
754 | else | |
755 | prev->next = NULL; | |
756 | kfree(substream); | |
757 | return err; | |
758 | } | |
1da177e4 LT |
759 | } |
760 | substream->group = &substream->self_group; | |
761 | spin_lock_init(&substream->self_group.lock); | |
257f8cce | 762 | mutex_init(&substream->self_group.mutex); |
1da177e4 LT |
763 | INIT_LIST_HEAD(&substream->self_group.substreams); |
764 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
9c323fcb | 765 | atomic_set(&substream->mmap_count, 0); |
1da177e4 LT |
766 | prev = substream; |
767 | } | |
768 | return 0; | |
769 | } | |
e88e8ae6 TI |
770 | EXPORT_SYMBOL(snd_pcm_new_stream); |
771 | ||
945e5038 LG |
772 | static int _snd_pcm_new(struct snd_card *card, const char *id, int device, |
773 | int playback_count, int capture_count, bool internal, | |
774 | struct snd_pcm **rpcm) | |
1da177e4 | 775 | { |
877211f5 | 776 | struct snd_pcm *pcm; |
1da177e4 | 777 | int err; |
877211f5 | 778 | static struct snd_device_ops ops = { |
1da177e4 LT |
779 | .dev_free = snd_pcm_dev_free, |
780 | .dev_register = snd_pcm_dev_register, | |
781 | .dev_disconnect = snd_pcm_dev_disconnect, | |
1da177e4 | 782 | }; |
8b645e4a TI |
783 | static struct snd_device_ops internal_ops = { |
784 | .dev_free = snd_pcm_dev_free, | |
785 | }; | |
1da177e4 | 786 | |
7eaa943c TI |
787 | if (snd_BUG_ON(!card)) |
788 | return -ENXIO; | |
789 | if (rpcm) | |
790 | *rpcm = NULL; | |
ca2c0966 | 791 | pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); |
ec0e9937 | 792 | if (!pcm) |
1da177e4 LT |
793 | return -ENOMEM; |
794 | pcm->card = card; | |
795 | pcm->device = device; | |
945e5038 | 796 | pcm->internal = internal; |
b95bd3a4 TI |
797 | mutex_init(&pcm->open_mutex); |
798 | init_waitqueue_head(&pcm->open_wait); | |
799 | INIT_LIST_HEAD(&pcm->list); | |
73e77ba0 | 800 | if (id) |
1da177e4 | 801 | strlcpy(pcm->id, id, sizeof(pcm->id)); |
97d15a14 ME |
802 | |
803 | err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, | |
804 | playback_count); | |
805 | if (err < 0) | |
806 | goto free_pcm; | |
807 | ||
808 | err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count); | |
809 | if (err < 0) | |
810 | goto free_pcm; | |
811 | ||
8b645e4a TI |
812 | err = snd_device_new(card, SNDRV_DEV_PCM, pcm, |
813 | internal ? &internal_ops : &ops); | |
97d15a14 ME |
814 | if (err < 0) |
815 | goto free_pcm; | |
816 | ||
7eaa943c TI |
817 | if (rpcm) |
818 | *rpcm = pcm; | |
1da177e4 | 819 | return 0; |
97d15a14 ME |
820 | |
821 | free_pcm: | |
822 | snd_pcm_free(pcm); | |
823 | return err; | |
1da177e4 LT |
824 | } |
825 | ||
945e5038 LG |
826 | /** |
827 | * snd_pcm_new - create a new PCM instance | |
828 | * @card: the card instance | |
829 | * @id: the id string | |
830 | * @device: the device index (zero based) | |
831 | * @playback_count: the number of substreams for playback | |
832 | * @capture_count: the number of substreams for capture | |
833 | * @rpcm: the pointer to store the new pcm instance | |
834 | * | |
835 | * Creates a new PCM instance. | |
836 | * | |
837 | * The pcm operators have to be set afterwards to the new instance | |
838 | * via snd_pcm_set_ops(). | |
839 | * | |
eb7c06e8 | 840 | * Return: Zero if successful, or a negative error code on failure. |
945e5038 LG |
841 | */ |
842 | int snd_pcm_new(struct snd_card *card, const char *id, int device, | |
843 | int playback_count, int capture_count, struct snd_pcm **rpcm) | |
844 | { | |
845 | return _snd_pcm_new(card, id, device, playback_count, capture_count, | |
846 | false, rpcm); | |
847 | } | |
e88e8ae6 TI |
848 | EXPORT_SYMBOL(snd_pcm_new); |
849 | ||
945e5038 LG |
850 | /** |
851 | * snd_pcm_new_internal - create a new internal PCM instance | |
852 | * @card: the card instance | |
853 | * @id: the id string | |
854 | * @device: the device index (zero based - shared with normal PCMs) | |
855 | * @playback_count: the number of substreams for playback | |
856 | * @capture_count: the number of substreams for capture | |
857 | * @rpcm: the pointer to store the new pcm instance | |
858 | * | |
859 | * Creates a new internal PCM instance with no userspace device or procfs | |
860 | * entries. This is used by ASoC Back End PCMs in order to create a PCM that | |
861 | * will only be used internally by kernel drivers. i.e. it cannot be opened | |
862 | * by userspace. It provides existing ASoC components drivers with a substream | |
863 | * and access to any private data. | |
864 | * | |
865 | * The pcm operators have to be set afterwards to the new instance | |
866 | * via snd_pcm_set_ops(). | |
867 | * | |
eb7c06e8 | 868 | * Return: Zero if successful, or a negative error code on failure. |
945e5038 LG |
869 | */ |
870 | int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, | |
871 | int playback_count, int capture_count, | |
872 | struct snd_pcm **rpcm) | |
873 | { | |
874 | return _snd_pcm_new(card, id, device, playback_count, capture_count, | |
875 | true, rpcm); | |
876 | } | |
877 | EXPORT_SYMBOL(snd_pcm_new_internal); | |
878 | ||
a8ff48cb TI |
879 | static void free_chmap(struct snd_pcm_str *pstr) |
880 | { | |
881 | if (pstr->chmap_kctl) { | |
882 | snd_ctl_remove(pstr->pcm->card, pstr->chmap_kctl); | |
883 | pstr->chmap_kctl = NULL; | |
884 | } | |
885 | } | |
886 | ||
877211f5 | 887 | static void snd_pcm_free_stream(struct snd_pcm_str * pstr) |
1da177e4 | 888 | { |
877211f5 | 889 | struct snd_pcm_substream *substream, *substream_next; |
8eeaa2f9 | 890 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
877211f5 | 891 | struct snd_pcm_oss_setup *setup, *setupn; |
1da177e4 LT |
892 | #endif |
893 | substream = pstr->substream; | |
894 | while (substream) { | |
895 | substream_next = substream->next; | |
c461482c | 896 | snd_pcm_timer_done(substream); |
1da177e4 LT |
897 | snd_pcm_substream_proc_done(substream); |
898 | kfree(substream); | |
899 | substream = substream_next; | |
900 | } | |
901 | snd_pcm_stream_proc_done(pstr); | |
8eeaa2f9 | 902 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
903 | for (setup = pstr->oss.setup_list; setup; setup = setupn) { |
904 | setupn = setup->next; | |
905 | kfree(setup->task_name); | |
906 | kfree(setup); | |
907 | } | |
908 | #endif | |
a8ff48cb | 909 | free_chmap(pstr); |
ef46c7af TI |
910 | if (pstr->substream_count) |
911 | put_device(&pstr->dev); | |
1da177e4 LT |
912 | } |
913 | ||
58f30d65 TI |
914 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
915 | #define pcm_call_notify(pcm, call) \ | |
916 | do { \ | |
917 | struct snd_pcm_notify *_notify; \ | |
918 | list_for_each_entry(_notify, &snd_pcm_notify_list, list) \ | |
919 | _notify->call(pcm); \ | |
920 | } while (0) | |
921 | #else | |
9aee03f3 | 922 | #define pcm_call_notify(pcm, call) do {} while (0) |
58f30d65 TI |
923 | #endif |
924 | ||
877211f5 | 925 | static int snd_pcm_free(struct snd_pcm *pcm) |
1da177e4 | 926 | { |
7eaa943c TI |
927 | if (!pcm) |
928 | return 0; | |
58f30d65 TI |
929 | if (!pcm->internal) |
930 | pcm_call_notify(pcm, n_unregister); | |
1da177e4 LT |
931 | if (pcm->private_free) |
932 | pcm->private_free(pcm); | |
933 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
934 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]); | |
935 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]); | |
936 | kfree(pcm); | |
937 | return 0; | |
938 | } | |
939 | ||
877211f5 | 940 | static int snd_pcm_dev_free(struct snd_device *device) |
1da177e4 | 941 | { |
877211f5 | 942 | struct snd_pcm *pcm = device->device_data; |
1da177e4 LT |
943 | return snd_pcm_free(pcm); |
944 | } | |
945 | ||
3bf75f9b TI |
946 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, |
947 | struct file *file, | |
948 | struct snd_pcm_substream **rsubstream) | |
1da177e4 | 949 | { |
877211f5 TI |
950 | struct snd_pcm_str * pstr; |
951 | struct snd_pcm_substream *substream; | |
952 | struct snd_pcm_runtime *runtime; | |
877211f5 | 953 | struct snd_card *card; |
23c18d4b | 954 | int prefer_subdevice; |
1da177e4 LT |
955 | size_t size; |
956 | ||
7eaa943c TI |
957 | if (snd_BUG_ON(!pcm || !rsubstream)) |
958 | return -ENXIO; | |
ad876c86 TI |
959 | if (snd_BUG_ON(stream != SNDRV_PCM_STREAM_PLAYBACK && |
960 | stream != SNDRV_PCM_STREAM_CAPTURE)) | |
961 | return -EINVAL; | |
1da177e4 | 962 | *rsubstream = NULL; |
1da177e4 | 963 | pstr = &pcm->streams[stream]; |
3bf75f9b | 964 | if (pstr->substream == NULL || pstr->substream_count == 0) |
1da177e4 LT |
965 | return -ENODEV; |
966 | ||
967 | card = pcm->card; | |
23c18d4b | 968 | prefer_subdevice = snd_ctl_get_preferred_subdevice(card, SND_CTL_SUBDEV_PCM); |
1da177e4 | 969 | |
ad876c86 TI |
970 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { |
971 | int opposite = !stream; | |
972 | ||
973 | for (substream = pcm->streams[opposite].substream; substream; | |
974 | substream = substream->next) { | |
975 | if (SUBSTREAM_BUSY(substream)) | |
976 | return -EAGAIN; | |
1da177e4 | 977 | } |
1da177e4 LT |
978 | } |
979 | ||
0df63e44 TI |
980 | if (file->f_flags & O_APPEND) { |
981 | if (prefer_subdevice < 0) { | |
982 | if (pstr->substream_count > 1) | |
983 | return -EINVAL; /* must be unique */ | |
984 | substream = pstr->substream; | |
985 | } else { | |
986 | for (substream = pstr->substream; substream; | |
987 | substream = substream->next) | |
988 | if (substream->number == prefer_subdevice) | |
989 | break; | |
990 | } | |
991 | if (! substream) | |
992 | return -ENODEV; | |
993 | if (! SUBSTREAM_BUSY(substream)) | |
994 | return -EBADFD; | |
995 | substream->ref_count++; | |
996 | *rsubstream = substream; | |
997 | return 0; | |
998 | } | |
999 | ||
ad876c86 TI |
1000 | for (substream = pstr->substream; substream; substream = substream->next) { |
1001 | if (!SUBSTREAM_BUSY(substream) && | |
1002 | (prefer_subdevice == -1 || | |
1003 | substream->number == prefer_subdevice)) | |
1da177e4 | 1004 | break; |
ad876c86 | 1005 | } |
1da177e4 LT |
1006 | if (substream == NULL) |
1007 | return -EAGAIN; | |
1008 | ||
ca2c0966 | 1009 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
1da177e4 LT |
1010 | if (runtime == NULL) |
1011 | return -ENOMEM; | |
1012 | ||
877211f5 | 1013 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)); |
1da177e4 LT |
1014 | runtime->status = snd_malloc_pages(size, GFP_KERNEL); |
1015 | if (runtime->status == NULL) { | |
1016 | kfree(runtime); | |
1017 | return -ENOMEM; | |
1018 | } | |
1019 | memset((void*)runtime->status, 0, size); | |
1020 | ||
877211f5 | 1021 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)); |
1da177e4 LT |
1022 | runtime->control = snd_malloc_pages(size, GFP_KERNEL); |
1023 | if (runtime->control == NULL) { | |
877211f5 TI |
1024 | snd_free_pages((void*)runtime->status, |
1025 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
1da177e4 LT |
1026 | kfree(runtime); |
1027 | return -ENOMEM; | |
1028 | } | |
1029 | memset((void*)runtime->control, 0, size); | |
1030 | ||
1031 | init_waitqueue_head(&runtime->sleep); | |
c91a988d | 1032 | init_waitqueue_head(&runtime->tsleep); |
1da177e4 LT |
1033 | |
1034 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
1035 | ||
1036 | substream->runtime = runtime; | |
1037 | substream->private_data = pcm->private_data; | |
0df63e44 TI |
1038 | substream->ref_count = 1; |
1039 | substream->f_flags = file->f_flags; | |
e7373b70 | 1040 | substream->pid = get_pid(task_pid(current)); |
1da177e4 LT |
1041 | pstr->substream_opened++; |
1042 | *rsubstream = substream; | |
1043 | return 0; | |
1044 | } | |
1045 | ||
3bf75f9b | 1046 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream) |
1da177e4 | 1047 | { |
877211f5 | 1048 | struct snd_pcm_runtime *runtime; |
0df63e44 | 1049 | |
7eaa943c TI |
1050 | if (PCM_RUNTIME_CHECK(substream)) |
1051 | return; | |
1da177e4 | 1052 | runtime = substream->runtime; |
1da177e4 LT |
1053 | if (runtime->private_free != NULL) |
1054 | runtime->private_free(runtime); | |
877211f5 TI |
1055 | snd_free_pages((void*)runtime->status, |
1056 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
1057 | snd_free_pages((void*)runtime->control, | |
1058 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))); | |
1da177e4 | 1059 | kfree(runtime->hw_constraints.rules); |
08b8768e TI |
1060 | /* Avoid concurrent access to runtime via PCM timer interface */ |
1061 | if (substream->timer) | |
1062 | spin_lock_irq(&substream->timer->lock); | |
1da177e4 | 1063 | substream->runtime = NULL; |
08b8768e TI |
1064 | if (substream->timer) |
1065 | spin_unlock_irq(&substream->timer->lock); | |
1066 | kfree(runtime); | |
e7373b70 CL |
1067 | put_pid(substream->pid); |
1068 | substream->pid = NULL; | |
1da177e4 LT |
1069 | substream->pstr->substream_opened--; |
1070 | } | |
1071 | ||
d80f19fa GKH |
1072 | static ssize_t show_pcm_class(struct device *dev, |
1073 | struct device_attribute *attr, char *buf) | |
9d19f48c | 1074 | { |
60b93030 TI |
1075 | struct snd_pcm_str *pstr = container_of(dev, struct snd_pcm_str, dev); |
1076 | struct snd_pcm *pcm = pstr->pcm; | |
9d19f48c TI |
1077 | const char *str; |
1078 | static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = { | |
1079 | [SNDRV_PCM_CLASS_GENERIC] = "generic", | |
1080 | [SNDRV_PCM_CLASS_MULTI] = "multi", | |
1081 | [SNDRV_PCM_CLASS_MODEM] = "modem", | |
1082 | [SNDRV_PCM_CLASS_DIGITIZER] = "digitizer", | |
1083 | }; | |
1084 | ||
60b93030 | 1085 | if (pcm->dev_class > SNDRV_PCM_CLASS_LAST) |
9d19f48c TI |
1086 | str = "none"; |
1087 | else | |
1088 | str = strs[pcm->dev_class]; | |
1089 | return snprintf(buf, PAGE_SIZE, "%s\n", str); | |
1090 | } | |
1091 | ||
caa751ba TI |
1092 | static DEVICE_ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL); |
1093 | static struct attribute *pcm_dev_attrs[] = { | |
1094 | &dev_attr_pcm_class.attr, | |
1095 | NULL | |
1096 | }; | |
1097 | ||
343fe850 | 1098 | static const struct attribute_group pcm_dev_attr_group = { |
caa751ba TI |
1099 | .attrs = pcm_dev_attrs, |
1100 | }; | |
1101 | ||
1102 | static const struct attribute_group *pcm_dev_attr_groups[] = { | |
1103 | &pcm_dev_attr_group, | |
1104 | NULL | |
1105 | }; | |
9d19f48c | 1106 | |
877211f5 | 1107 | static int snd_pcm_dev_register(struct snd_device *device) |
1da177e4 | 1108 | { |
f87135f5 | 1109 | int cidx, err; |
877211f5 | 1110 | struct snd_pcm_substream *substream; |
4b3be6af | 1111 | struct snd_pcm *pcm; |
1da177e4 | 1112 | |
4b3be6af | 1113 | if (snd_BUG_ON(!device || !device->device_data)) |
7eaa943c | 1114 | return -ENXIO; |
4b3be6af | 1115 | pcm = device->device_data; |
b95bd3a4 | 1116 | |
1a60d4c5 | 1117 | mutex_lock(®ister_mutex); |
f90c06a2 | 1118 | err = snd_pcm_add(pcm); |
b95bd3a4 TI |
1119 | if (err) |
1120 | goto unlock; | |
1da177e4 LT |
1121 | for (cidx = 0; cidx < 2; cidx++) { |
1122 | int devtype = -1; | |
b95bd3a4 | 1123 | if (pcm->streams[cidx].substream == NULL) |
1da177e4 LT |
1124 | continue; |
1125 | switch (cidx) { | |
1126 | case SNDRV_PCM_STREAM_PLAYBACK: | |
1da177e4 LT |
1127 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
1128 | break; | |
1129 | case SNDRV_PCM_STREAM_CAPTURE: | |
1da177e4 LT |
1130 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
1131 | break; | |
1132 | } | |
c78085fc | 1133 | /* register pcm */ |
40a4b263 TI |
1134 | err = snd_register_device(devtype, pcm->card, pcm->device, |
1135 | &snd_pcm_f_ops[cidx], pcm, | |
1136 | &pcm->streams[cidx].dev); | |
c78085fc | 1137 | if (err < 0) { |
b95bd3a4 TI |
1138 | list_del_init(&pcm->list); |
1139 | goto unlock; | |
1da177e4 | 1140 | } |
caa751ba | 1141 | |
1da177e4 LT |
1142 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
1143 | snd_pcm_timer_init(substream); | |
1144 | } | |
9244b2c3 | 1145 | |
58f30d65 | 1146 | pcm_call_notify(pcm, n_register); |
9244b2c3 | 1147 | |
b95bd3a4 | 1148 | unlock: |
1a60d4c5 | 1149 | mutex_unlock(®ister_mutex); |
b95bd3a4 | 1150 | return err; |
1da177e4 LT |
1151 | } |
1152 | ||
877211f5 | 1153 | static int snd_pcm_dev_disconnect(struct snd_device *device) |
1da177e4 | 1154 | { |
877211f5 | 1155 | struct snd_pcm *pcm = device->device_data; |
877211f5 | 1156 | struct snd_pcm_substream *substream; |
40a4b263 | 1157 | int cidx; |
1da177e4 | 1158 | |
1a60d4c5 | 1159 | mutex_lock(®ister_mutex); |
9b0573c0 | 1160 | mutex_lock(&pcm->open_mutex); |
0914f796 | 1161 | wake_up(&pcm->open_wait); |
f87135f5 | 1162 | list_del_init(&pcm->list); |
646e1dd8 | 1163 | for (cidx = 0; cidx < 2; cidx++) { |
9b0573c0 TI |
1164 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) { |
1165 | snd_pcm_stream_lock_irq(substream); | |
0914f796 | 1166 | if (substream->runtime) { |
6ca73de7 TI |
1167 | if (snd_pcm_running(substream)) |
1168 | snd_pcm_stop(substream, | |
1169 | SNDRV_PCM_STATE_DISCONNECTED); | |
1170 | /* to be sure, set the state unconditionally */ | |
1da177e4 | 1171 | substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED; |
0914f796 TI |
1172 | wake_up(&substream->runtime->sleep); |
1173 | wake_up(&substream->runtime->tsleep); | |
1174 | } | |
9b0573c0 TI |
1175 | snd_pcm_stream_unlock_irq(substream); |
1176 | } | |
646e1dd8 | 1177 | } |
8b645e4a TI |
1178 | |
1179 | pcm_call_notify(pcm, n_disconnect); | |
1da177e4 | 1180 | for (cidx = 0; cidx < 2; cidx++) { |
8b645e4a | 1181 | snd_unregister_device(&pcm->streams[cidx].dev); |
a8ff48cb | 1182 | free_chmap(&pcm->streams[cidx]); |
1da177e4 | 1183 | } |
9b0573c0 | 1184 | mutex_unlock(&pcm->open_mutex); |
1a60d4c5 | 1185 | mutex_unlock(®ister_mutex); |
c461482c | 1186 | return 0; |
1da177e4 LT |
1187 | } |
1188 | ||
58f30d65 | 1189 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
30b771cf TI |
1190 | /** |
1191 | * snd_pcm_notify - Add/remove the notify list | |
1192 | * @notify: PCM notify list | |
1193 | * @nfree: 0 = register, 1 = unregister | |
1194 | * | |
1195 | * This adds the given notifier to the global list so that the callback is | |
1196 | * called for each registered PCM devices. This exists only for PCM OSS | |
1197 | * emulation, so far. | |
1198 | */ | |
877211f5 | 1199 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree) |
1da177e4 | 1200 | { |
9244b2c3 | 1201 | struct snd_pcm *pcm; |
1da177e4 | 1202 | |
7eaa943c TI |
1203 | if (snd_BUG_ON(!notify || |
1204 | !notify->n_register || | |
1205 | !notify->n_unregister || | |
1206 | !notify->n_disconnect)) | |
1207 | return -EINVAL; | |
1a60d4c5 | 1208 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1209 | if (nfree) { |
1210 | list_del(¬ify->list); | |
9244b2c3 JB |
1211 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1212 | notify->n_unregister(pcm); | |
1da177e4 LT |
1213 | } else { |
1214 | list_add_tail(¬ify->list, &snd_pcm_notify_list); | |
9244b2c3 JB |
1215 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1216 | notify->n_register(pcm); | |
1da177e4 | 1217 | } |
1a60d4c5 | 1218 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1219 | return 0; |
1220 | } | |
e88e8ae6 | 1221 | EXPORT_SYMBOL(snd_pcm_notify); |
58f30d65 | 1222 | #endif /* CONFIG_SND_PCM_OSS */ |
e88e8ae6 | 1223 | |
cd6a6503 | 1224 | #ifdef CONFIG_SND_PROC_FS |
1da177e4 LT |
1225 | /* |
1226 | * Info interface | |
1227 | */ | |
1228 | ||
877211f5 TI |
1229 | static void snd_pcm_proc_read(struct snd_info_entry *entry, |
1230 | struct snd_info_buffer *buffer) | |
1da177e4 | 1231 | { |
877211f5 | 1232 | struct snd_pcm *pcm; |
1da177e4 | 1233 | |
1a60d4c5 | 1234 | mutex_lock(®ister_mutex); |
9244b2c3 | 1235 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
f87135f5 CL |
1236 | snd_iprintf(buffer, "%02i-%02i: %s : %s", |
1237 | pcm->card->number, pcm->device, pcm->id, pcm->name); | |
1da177e4 | 1238 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) |
877211f5 TI |
1239 | snd_iprintf(buffer, " : playback %i", |
1240 | pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count); | |
1da177e4 | 1241 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) |
877211f5 TI |
1242 | snd_iprintf(buffer, " : capture %i", |
1243 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); | |
1da177e4 LT |
1244 | snd_iprintf(buffer, "\n"); |
1245 | } | |
1a60d4c5 | 1246 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1247 | } |
1248 | ||
6581f4e7 | 1249 | static struct snd_info_entry *snd_pcm_proc_entry; |
1da177e4 | 1250 | |
e28563cc | 1251 | static void snd_pcm_proc_init(void) |
1da177e4 | 1252 | { |
877211f5 | 1253 | struct snd_info_entry *entry; |
1da177e4 | 1254 | |
c8da9be4 ME |
1255 | entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL); |
1256 | if (entry) { | |
bf850204 | 1257 | snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read); |
1da177e4 LT |
1258 | if (snd_info_register(entry) < 0) { |
1259 | snd_info_free_entry(entry); | |
1260 | entry = NULL; | |
1261 | } | |
1262 | } | |
1263 | snd_pcm_proc_entry = entry; | |
e28563cc TI |
1264 | } |
1265 | ||
1266 | static void snd_pcm_proc_done(void) | |
1267 | { | |
746d4a02 | 1268 | snd_info_free_entry(snd_pcm_proc_entry); |
e28563cc TI |
1269 | } |
1270 | ||
cd6a6503 | 1271 | #else /* !CONFIG_SND_PROC_FS */ |
e28563cc TI |
1272 | #define snd_pcm_proc_init() |
1273 | #define snd_pcm_proc_done() | |
cd6a6503 | 1274 | #endif /* CONFIG_SND_PROC_FS */ |
e28563cc TI |
1275 | |
1276 | ||
1277 | /* | |
1278 | * ENTRY functions | |
1279 | */ | |
1280 | ||
1281 | static int __init alsa_pcm_init(void) | |
1282 | { | |
1283 | snd_ctl_register_ioctl(snd_pcm_control_ioctl); | |
1284 | snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl); | |
1285 | snd_pcm_proc_init(); | |
1da177e4 LT |
1286 | return 0; |
1287 | } | |
1288 | ||
1289 | static void __exit alsa_pcm_exit(void) | |
1290 | { | |
1291 | snd_ctl_unregister_ioctl(snd_pcm_control_ioctl); | |
1292 | snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl); | |
e28563cc | 1293 | snd_pcm_proc_done(); |
1da177e4 LT |
1294 | } |
1295 | ||
1296 | module_init(alsa_pcm_init) | |
1297 | module_exit(alsa_pcm_exit) |