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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> |
1da177e4 LT |
28 | #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 | ||
2c4842d3 TS |
34 | #include "pcm_local.h" |
35 | ||
c1017a4c | 36 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); |
1da177e4 LT |
37 | MODULE_DESCRIPTION("Midlevel PCM code for ALSA."); |
38 | MODULE_LICENSE("GPL"); | |
39 | ||
f87135f5 | 40 | static LIST_HEAD(snd_pcm_devices); |
1a60d4c5 | 41 | static DEFINE_MUTEX(register_mutex); |
58f30d65 TI |
42 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
43 | static LIST_HEAD(snd_pcm_notify_list); | |
44 | #endif | |
1da177e4 | 45 | |
877211f5 TI |
46 | static int snd_pcm_free(struct snd_pcm *pcm); |
47 | static int snd_pcm_dev_free(struct snd_device *device); | |
48 | static int snd_pcm_dev_register(struct snd_device *device); | |
49 | static int snd_pcm_dev_disconnect(struct snd_device *device); | |
1da177e4 | 50 | |
f90c06a2 | 51 | static struct snd_pcm *snd_pcm_get(struct snd_card *card, int device) |
f87135f5 | 52 | { |
f87135f5 CL |
53 | struct snd_pcm *pcm; |
54 | ||
9244b2c3 | 55 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
f87135f5 CL |
56 | if (pcm->card == card && pcm->device == device) |
57 | return pcm; | |
58 | } | |
59 | return NULL; | |
60 | } | |
61 | ||
f90c06a2 PM |
62 | static int snd_pcm_next(struct snd_card *card, int device) |
63 | { | |
64 | struct snd_pcm *pcm; | |
65 | ||
66 | list_for_each_entry(pcm, &snd_pcm_devices, list) { | |
67 | if (pcm->card == card && pcm->device > device) | |
68 | return pcm->device; | |
69 | else if (pcm->card->number > card->number) | |
70 | return -1; | |
71 | } | |
72 | return -1; | |
73 | } | |
74 | ||
75 | static int snd_pcm_add(struct snd_pcm *newpcm) | |
76 | { | |
77 | struct snd_pcm *pcm; | |
78 | ||
b95bd3a4 TI |
79 | if (newpcm->internal) |
80 | return 0; | |
81 | ||
f90c06a2 PM |
82 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
83 | if (pcm->card == newpcm->card && pcm->device == newpcm->device) | |
84 | return -EBUSY; | |
85 | if (pcm->card->number > newpcm->card->number || | |
86 | (pcm->card == newpcm->card && | |
87 | pcm->device > newpcm->device)) { | |
88 | list_add(&newpcm->list, pcm->list.prev); | |
89 | return 0; | |
90 | } | |
91 | } | |
92 | list_add_tail(&newpcm->list, &snd_pcm_devices); | |
93 | return 0; | |
94 | } | |
95 | ||
877211f5 TI |
96 | static int snd_pcm_control_ioctl(struct snd_card *card, |
97 | struct snd_ctl_file *control, | |
1da177e4 LT |
98 | unsigned int cmd, unsigned long arg) |
99 | { | |
1da177e4 LT |
100 | switch (cmd) { |
101 | case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE: | |
102 | { | |
103 | int device; | |
104 | ||
105 | if (get_user(device, (int __user *)arg)) | |
106 | return -EFAULT; | |
1a60d4c5 | 107 | mutex_lock(®ister_mutex); |
f90c06a2 | 108 | device = snd_pcm_next(card, device); |
1a60d4c5 | 109 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
110 | if (put_user(device, (int __user *)arg)) |
111 | return -EFAULT; | |
112 | return 0; | |
113 | } | |
114 | case SNDRV_CTL_IOCTL_PCM_INFO: | |
115 | { | |
877211f5 | 116 | struct snd_pcm_info __user *info; |
1da177e4 | 117 | unsigned int device, subdevice; |
877211f5 TI |
118 | int stream; |
119 | struct snd_pcm *pcm; | |
120 | struct snd_pcm_str *pstr; | |
121 | struct snd_pcm_substream *substream; | |
f87135f5 CL |
122 | int err; |
123 | ||
877211f5 | 124 | info = (struct snd_pcm_info __user *)arg; |
1da177e4 LT |
125 | if (get_user(device, &info->device)) |
126 | return -EFAULT; | |
1da177e4 LT |
127 | if (get_user(stream, &info->stream)) |
128 | return -EFAULT; | |
129 | if (stream < 0 || stream > 1) | |
130 | return -EINVAL; | |
1da177e4 LT |
131 | if (get_user(subdevice, &info->subdevice)) |
132 | return -EFAULT; | |
1a60d4c5 | 133 | mutex_lock(®ister_mutex); |
f90c06a2 | 134 | pcm = snd_pcm_get(card, device); |
f87135f5 CL |
135 | if (pcm == NULL) { |
136 | err = -ENXIO; | |
137 | goto _error; | |
138 | } | |
139 | pstr = &pcm->streams[stream]; | |
140 | if (pstr->substream_count == 0) { | |
141 | err = -ENOENT; | |
142 | goto _error; | |
143 | } | |
144 | if (subdevice >= pstr->substream_count) { | |
145 | err = -ENXIO; | |
146 | goto _error; | |
147 | } | |
148 | for (substream = pstr->substream; substream; | |
149 | substream = substream->next) | |
1da177e4 LT |
150 | if (substream->number == (int)subdevice) |
151 | break; | |
f87135f5 CL |
152 | if (substream == NULL) { |
153 | err = -ENXIO; | |
154 | goto _error; | |
155 | } | |
d5b39a01 | 156 | mutex_lock(&pcm->open_mutex); |
f87135f5 | 157 | err = snd_pcm_info_user(substream, info); |
d5b39a01 | 158 | mutex_unlock(&pcm->open_mutex); |
f87135f5 | 159 | _error: |
1a60d4c5 | 160 | mutex_unlock(®ister_mutex); |
f87135f5 | 161 | return err; |
1da177e4 LT |
162 | } |
163 | case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE: | |
164 | { | |
165 | int val; | |
166 | ||
167 | if (get_user(val, (int __user *)arg)) | |
168 | return -EFAULT; | |
23c18d4b | 169 | control->preferred_subdevice[SND_CTL_SUBDEV_PCM] = val; |
1da177e4 LT |
170 | return 0; |
171 | } | |
172 | } | |
173 | return -ENOIOCTLCMD; | |
174 | } | |
21a3479a | 175 | |
1da177e4 | 176 | #define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v |
1da177e4 | 177 | |
1da177e4 LT |
178 | static char *snd_pcm_format_names[] = { |
179 | FORMAT(S8), | |
180 | FORMAT(U8), | |
181 | FORMAT(S16_LE), | |
182 | FORMAT(S16_BE), | |
183 | FORMAT(U16_LE), | |
184 | FORMAT(U16_BE), | |
185 | FORMAT(S24_LE), | |
186 | FORMAT(S24_BE), | |
187 | FORMAT(U24_LE), | |
188 | FORMAT(U24_BE), | |
189 | FORMAT(S32_LE), | |
190 | FORMAT(S32_BE), | |
191 | FORMAT(U32_LE), | |
192 | FORMAT(U32_BE), | |
193 | FORMAT(FLOAT_LE), | |
194 | FORMAT(FLOAT_BE), | |
195 | FORMAT(FLOAT64_LE), | |
196 | FORMAT(FLOAT64_BE), | |
197 | FORMAT(IEC958_SUBFRAME_LE), | |
198 | FORMAT(IEC958_SUBFRAME_BE), | |
199 | FORMAT(MU_LAW), | |
200 | FORMAT(A_LAW), | |
201 | FORMAT(IMA_ADPCM), | |
202 | FORMAT(MPEG), | |
203 | FORMAT(GSM), | |
204 | FORMAT(SPECIAL), | |
205 | FORMAT(S24_3LE), | |
206 | FORMAT(S24_3BE), | |
207 | FORMAT(U24_3LE), | |
208 | FORMAT(U24_3BE), | |
209 | FORMAT(S20_3LE), | |
210 | FORMAT(S20_3BE), | |
211 | FORMAT(U20_3LE), | |
212 | FORMAT(U20_3BE), | |
213 | FORMAT(S18_3LE), | |
214 | FORMAT(S18_3BE), | |
215 | FORMAT(U18_3LE), | |
216 | FORMAT(U18_3BE), | |
7a28826a DC |
217 | FORMAT(G723_24), |
218 | FORMAT(G723_24_1B), | |
219 | FORMAT(G723_40), | |
220 | FORMAT(G723_40_1B), | |
ef7a4f97 DM |
221 | FORMAT(DSD_U8), |
222 | FORMAT(DSD_U16_LE), | |
d4288d3f | 223 | FORMAT(DSD_U32_LE), |
d42472ec JL |
224 | FORMAT(DSD_U16_BE), |
225 | FORMAT(DSD_U32_BE), | |
1da177e4 LT |
226 | }; |
227 | ||
30b771cf TI |
228 | /** |
229 | * snd_pcm_format_name - Return a name string for the given PCM format | |
230 | * @format: PCM format | |
231 | */ | |
6e5265ec | 232 | const char *snd_pcm_format_name(snd_pcm_format_t format) |
e28563cc | 233 | { |
fea952e5 | 234 | if ((__force unsigned int)format >= ARRAY_SIZE(snd_pcm_format_names)) |
7a28826a | 235 | return "Unknown"; |
fea952e5 | 236 | return snd_pcm_format_names[(__force unsigned int)format]; |
e28563cc | 237 | } |
6e5265ec TI |
238 | EXPORT_SYMBOL_GPL(snd_pcm_format_name); |
239 | ||
240 | #ifdef CONFIG_SND_VERBOSE_PROCFS | |
241 | ||
242 | #define STATE(v) [SNDRV_PCM_STATE_##v] = #v | |
243 | #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v | |
244 | #define READY(v) [SNDRV_PCM_READY_##v] = #v | |
245 | #define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v | |
246 | #define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v | |
247 | #define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v | |
248 | #define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v | |
249 | #define START(v) [SNDRV_PCM_START_##v] = #v | |
250 | #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v | |
e28563cc | 251 | |
e28563cc TI |
252 | static char *snd_pcm_stream_names[] = { |
253 | STREAM(PLAYBACK), | |
254 | STREAM(CAPTURE), | |
255 | }; | |
256 | ||
257 | static char *snd_pcm_state_names[] = { | |
258 | STATE(OPEN), | |
259 | STATE(SETUP), | |
260 | STATE(PREPARED), | |
261 | STATE(RUNNING), | |
262 | STATE(XRUN), | |
263 | STATE(DRAINING), | |
264 | STATE(PAUSED), | |
265 | STATE(SUSPENDED), | |
266 | }; | |
267 | ||
268 | static char *snd_pcm_access_names[] = { | |
269 | ACCESS(MMAP_INTERLEAVED), | |
270 | ACCESS(MMAP_NONINTERLEAVED), | |
271 | ACCESS(MMAP_COMPLEX), | |
272 | ACCESS(RW_INTERLEAVED), | |
273 | ACCESS(RW_NONINTERLEAVED), | |
274 | }; | |
275 | ||
1da177e4 LT |
276 | static char *snd_pcm_subformat_names[] = { |
277 | SUBFORMAT(STD), | |
278 | }; | |
279 | ||
280 | static char *snd_pcm_tstamp_mode_names[] = { | |
281 | TSTAMP(NONE), | |
8c121586 | 282 | TSTAMP(ENABLE), |
1da177e4 LT |
283 | }; |
284 | ||
877211f5 | 285 | static const char *snd_pcm_stream_name(int stream) |
1da177e4 | 286 | { |
1da177e4 LT |
287 | return snd_pcm_stream_names[stream]; |
288 | } | |
289 | ||
290 | static const char *snd_pcm_access_name(snd_pcm_access_t access) | |
291 | { | |
fea952e5 | 292 | return snd_pcm_access_names[(__force int)access]; |
1da177e4 LT |
293 | } |
294 | ||
1da177e4 LT |
295 | static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat) |
296 | { | |
fea952e5 | 297 | return snd_pcm_subformat_names[(__force int)subformat]; |
1da177e4 LT |
298 | } |
299 | ||
877211f5 | 300 | static const char *snd_pcm_tstamp_mode_name(int mode) |
1da177e4 | 301 | { |
1da177e4 LT |
302 | return snd_pcm_tstamp_mode_names[mode]; |
303 | } | |
304 | ||
305 | static const char *snd_pcm_state_name(snd_pcm_state_t state) | |
306 | { | |
fea952e5 | 307 | return snd_pcm_state_names[(__force int)state]; |
1da177e4 LT |
308 | } |
309 | ||
8eeaa2f9 | 310 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 | 311 | #include <linux/soundcard.h> |
1a60d4c5 | 312 | |
1da177e4 LT |
313 | static const char *snd_pcm_oss_format_name(int format) |
314 | { | |
315 | switch (format) { | |
316 | case AFMT_MU_LAW: | |
317 | return "MU_LAW"; | |
318 | case AFMT_A_LAW: | |
319 | return "A_LAW"; | |
320 | case AFMT_IMA_ADPCM: | |
321 | return "IMA_ADPCM"; | |
322 | case AFMT_U8: | |
323 | return "U8"; | |
324 | case AFMT_S16_LE: | |
325 | return "S16_LE"; | |
326 | case AFMT_S16_BE: | |
327 | return "S16_BE"; | |
328 | case AFMT_S8: | |
329 | return "S8"; | |
330 | case AFMT_U16_LE: | |
331 | return "U16_LE"; | |
332 | case AFMT_U16_BE: | |
333 | return "U16_BE"; | |
334 | case AFMT_MPEG: | |
335 | return "MPEG"; | |
336 | default: | |
337 | return "unknown"; | |
338 | } | |
339 | } | |
340 | #endif | |
341 | ||
877211f5 TI |
342 | static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, |
343 | struct snd_info_buffer *buffer) | |
1da177e4 | 344 | { |
877211f5 | 345 | struct snd_pcm_info *info; |
1da177e4 LT |
346 | int err; |
347 | ||
7c22f1aa TI |
348 | if (! substream) |
349 | return; | |
1da177e4 LT |
350 | |
351 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
ec0e9937 | 352 | if (!info) |
1da177e4 | 353 | return; |
1da177e4 LT |
354 | |
355 | err = snd_pcm_info(substream, info); | |
356 | if (err < 0) { | |
357 | snd_iprintf(buffer, "error %d\n", err); | |
358 | kfree(info); | |
359 | return; | |
360 | } | |
361 | snd_iprintf(buffer, "card: %d\n", info->card); | |
362 | snd_iprintf(buffer, "device: %d\n", info->device); | |
363 | snd_iprintf(buffer, "subdevice: %d\n", info->subdevice); | |
364 | snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream)); | |
365 | snd_iprintf(buffer, "id: %s\n", info->id); | |
366 | snd_iprintf(buffer, "name: %s\n", info->name); | |
367 | snd_iprintf(buffer, "subname: %s\n", info->subname); | |
368 | snd_iprintf(buffer, "class: %d\n", info->dev_class); | |
369 | snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); | |
370 | snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); | |
371 | snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); | |
372 | kfree(info); | |
373 | } | |
374 | ||
877211f5 TI |
375 | static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry, |
376 | struct snd_info_buffer *buffer) | |
1da177e4 | 377 | { |
877211f5 TI |
378 | snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream, |
379 | buffer); | |
1da177e4 LT |
380 | } |
381 | ||
877211f5 TI |
382 | static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry, |
383 | struct snd_info_buffer *buffer) | |
1da177e4 | 384 | { |
9fe856e4 | 385 | snd_pcm_proc_info_read(entry->private_data, buffer); |
1da177e4 LT |
386 | } |
387 | ||
877211f5 TI |
388 | static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry, |
389 | struct snd_info_buffer *buffer) | |
1da177e4 | 390 | { |
877211f5 | 391 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 TI |
392 | struct snd_pcm_runtime *runtime; |
393 | ||
394 | mutex_lock(&substream->pcm->open_mutex); | |
395 | runtime = substream->runtime; | |
1da177e4 LT |
396 | if (!runtime) { |
397 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 398 | goto unlock; |
1da177e4 | 399 | } |
1da177e4 LT |
400 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
401 | snd_iprintf(buffer, "no setup\n"); | |
901d46d5 | 402 | goto unlock; |
1da177e4 LT |
403 | } |
404 | snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); | |
405 | snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); | |
406 | snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat)); | |
407 | snd_iprintf(buffer, "channels: %u\n", runtime->channels); | |
408 | snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den); | |
409 | snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size); | |
410 | snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size); | |
8eeaa2f9 | 411 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
412 | if (substream->oss.oss) { |
413 | snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format)); | |
414 | snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels); | |
415 | snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate); | |
416 | snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes); | |
417 | snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods); | |
418 | snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); | |
419 | } | |
420 | #endif | |
901d46d5 TI |
421 | unlock: |
422 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 LT |
423 | } |
424 | ||
877211f5 TI |
425 | static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, |
426 | struct snd_info_buffer *buffer) | |
1da177e4 | 427 | { |
877211f5 | 428 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 TI |
429 | struct snd_pcm_runtime *runtime; |
430 | ||
431 | mutex_lock(&substream->pcm->open_mutex); | |
432 | runtime = substream->runtime; | |
1da177e4 LT |
433 | if (!runtime) { |
434 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 435 | goto unlock; |
1da177e4 | 436 | } |
1da177e4 LT |
437 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
438 | snd_iprintf(buffer, "no setup\n"); | |
901d46d5 | 439 | goto unlock; |
1da177e4 LT |
440 | } |
441 | snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); | |
442 | snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); | |
1da177e4 | 443 | snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min); |
1da177e4 LT |
444 | snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold); |
445 | snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold); | |
446 | snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); | |
447 | snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); | |
448 | snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); | |
901d46d5 TI |
449 | unlock: |
450 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 LT |
451 | } |
452 | ||
877211f5 TI |
453 | static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, |
454 | struct snd_info_buffer *buffer) | |
1da177e4 | 455 | { |
877211f5 | 456 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 | 457 | struct snd_pcm_runtime *runtime; |
877211f5 | 458 | struct snd_pcm_status status; |
1da177e4 | 459 | int err; |
901d46d5 TI |
460 | |
461 | mutex_lock(&substream->pcm->open_mutex); | |
462 | runtime = substream->runtime; | |
1da177e4 LT |
463 | if (!runtime) { |
464 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 465 | goto unlock; |
1da177e4 LT |
466 | } |
467 | memset(&status, 0, sizeof(status)); | |
468 | err = snd_pcm_status(substream, &status); | |
469 | if (err < 0) { | |
470 | snd_iprintf(buffer, "error %d\n", err); | |
901d46d5 | 471 | goto unlock; |
1da177e4 LT |
472 | } |
473 | snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); | |
e7373b70 | 474 | snd_iprintf(buffer, "owner_pid : %d\n", pid_vnr(substream->pid)); |
1da177e4 LT |
475 | snd_iprintf(buffer, "trigger_time: %ld.%09ld\n", |
476 | status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec); | |
477 | snd_iprintf(buffer, "tstamp : %ld.%09ld\n", | |
478 | status.tstamp.tv_sec, status.tstamp.tv_nsec); | |
479 | snd_iprintf(buffer, "delay : %ld\n", status.delay); | |
480 | snd_iprintf(buffer, "avail : %ld\n", status.avail); | |
481 | snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max); | |
482 | snd_iprintf(buffer, "-----\n"); | |
483 | snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); | |
484 | snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); | |
901d46d5 TI |
485 | unlock: |
486 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 | 487 | } |
1da177e4 | 488 | |
61fb63c0 | 489 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
2b30d411 TI |
490 | static void snd_pcm_xrun_injection_write(struct snd_info_entry *entry, |
491 | struct snd_info_buffer *buffer) | |
492 | { | |
493 | struct snd_pcm_substream *substream = entry->private_data; | |
494 | struct snd_pcm_runtime *runtime; | |
495 | ||
496 | snd_pcm_stream_lock_irq(substream); | |
497 | runtime = substream->runtime; | |
498 | if (runtime && runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
499 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
500 | snd_pcm_stream_unlock_irq(substream); | |
501 | } | |
502 | ||
877211f5 TI |
503 | static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry, |
504 | struct snd_info_buffer *buffer) | |
1da177e4 | 505 | { |
877211f5 | 506 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
507 | snd_iprintf(buffer, "%d\n", pstr->xrun_debug); |
508 | } | |
509 | ||
877211f5 TI |
510 | static void snd_pcm_xrun_debug_write(struct snd_info_entry *entry, |
511 | struct snd_info_buffer *buffer) | |
1da177e4 | 512 | { |
877211f5 | 513 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
514 | char line[64]; |
515 | if (!snd_info_get_line(buffer, line, sizeof(line))) | |
516 | pstr->xrun_debug = simple_strtoul(line, NULL, 10); | |
517 | } | |
518 | #endif | |
519 | ||
877211f5 | 520 | static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) |
1da177e4 | 521 | { |
877211f5 TI |
522 | struct snd_pcm *pcm = pstr->pcm; |
523 | struct snd_info_entry *entry; | |
1da177e4 LT |
524 | char name[16]; |
525 | ||
526 | sprintf(name, "pcm%i%c", pcm->device, | |
527 | pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); | |
528 | if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL) | |
529 | return -ENOMEM; | |
530 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
531 | if (snd_info_register(entry) < 0) { | |
532 | snd_info_free_entry(entry); | |
533 | return -ENOMEM; | |
534 | } | |
535 | pstr->proc_root = entry; | |
536 | ||
537 | if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) { | |
bf850204 | 538 | snd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read); |
1da177e4 LT |
539 | if (snd_info_register(entry) < 0) { |
540 | snd_info_free_entry(entry); | |
541 | entry = NULL; | |
542 | } | |
543 | } | |
544 | pstr->proc_info_entry = entry; | |
545 | ||
61fb63c0 | 546 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
877211f5 TI |
547 | if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug", |
548 | pstr->proc_root)) != NULL) { | |
1da177e4 | 549 | entry->c.text.read = snd_pcm_xrun_debug_read; |
1da177e4 | 550 | entry->c.text.write = snd_pcm_xrun_debug_write; |
bd7bf042 | 551 | entry->mode |= S_IWUSR; |
1da177e4 LT |
552 | entry->private_data = pstr; |
553 | if (snd_info_register(entry) < 0) { | |
554 | snd_info_free_entry(entry); | |
555 | entry = NULL; | |
556 | } | |
557 | } | |
558 | pstr->proc_xrun_debug_entry = entry; | |
559 | #endif | |
560 | return 0; | |
561 | } | |
562 | ||
877211f5 | 563 | static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) |
1da177e4 | 564 | { |
61fb63c0 | 565 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
746d4a02 TI |
566 | snd_info_free_entry(pstr->proc_xrun_debug_entry); |
567 | pstr->proc_xrun_debug_entry = NULL; | |
1da177e4 | 568 | #endif |
746d4a02 TI |
569 | snd_info_free_entry(pstr->proc_info_entry); |
570 | pstr->proc_info_entry = NULL; | |
571 | snd_info_free_entry(pstr->proc_root); | |
572 | pstr->proc_root = NULL; | |
1da177e4 LT |
573 | return 0; |
574 | } | |
575 | ||
877211f5 | 576 | static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) |
1da177e4 | 577 | { |
877211f5 TI |
578 | struct snd_info_entry *entry; |
579 | struct snd_card *card; | |
1da177e4 LT |
580 | char name[16]; |
581 | ||
582 | card = substream->pcm->card; | |
583 | ||
584 | sprintf(name, "sub%i", substream->number); | |
585 | if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL) | |
586 | return -ENOMEM; | |
587 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
588 | if (snd_info_register(entry) < 0) { | |
589 | snd_info_free_entry(entry); | |
590 | return -ENOMEM; | |
591 | } | |
592 | substream->proc_root = entry; | |
593 | ||
594 | if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) { | |
bf850204 TI |
595 | snd_info_set_text_ops(entry, substream, |
596 | snd_pcm_substream_proc_info_read); | |
1da177e4 LT |
597 | if (snd_info_register(entry) < 0) { |
598 | snd_info_free_entry(entry); | |
599 | entry = NULL; | |
600 | } | |
601 | } | |
602 | substream->proc_info_entry = entry; | |
603 | ||
604 | if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
605 | snd_info_set_text_ops(entry, substream, |
606 | snd_pcm_substream_proc_hw_params_read); | |
1da177e4 LT |
607 | if (snd_info_register(entry) < 0) { |
608 | snd_info_free_entry(entry); | |
609 | entry = NULL; | |
610 | } | |
611 | } | |
612 | substream->proc_hw_params_entry = entry; | |
613 | ||
614 | if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
615 | snd_info_set_text_ops(entry, substream, |
616 | snd_pcm_substream_proc_sw_params_read); | |
1da177e4 LT |
617 | if (snd_info_register(entry) < 0) { |
618 | snd_info_free_entry(entry); | |
619 | entry = NULL; | |
620 | } | |
621 | } | |
622 | substream->proc_sw_params_entry = entry; | |
623 | ||
624 | if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) { | |
bf850204 TI |
625 | snd_info_set_text_ops(entry, substream, |
626 | snd_pcm_substream_proc_status_read); | |
1da177e4 LT |
627 | if (snd_info_register(entry) < 0) { |
628 | snd_info_free_entry(entry); | |
629 | entry = NULL; | |
630 | } | |
631 | } | |
632 | substream->proc_status_entry = entry; | |
633 | ||
2b30d411 TI |
634 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
635 | entry = snd_info_create_card_entry(card, "xrun_injection", | |
636 | substream->proc_root); | |
637 | if (entry) { | |
638 | entry->private_data = substream; | |
639 | entry->c.text.read = NULL; | |
640 | entry->c.text.write = snd_pcm_xrun_injection_write; | |
641 | entry->mode = S_IFREG | S_IWUSR; | |
642 | if (snd_info_register(entry) < 0) { | |
643 | snd_info_free_entry(entry); | |
644 | entry = NULL; | |
645 | } | |
646 | } | |
647 | substream->proc_xrun_injection_entry = entry; | |
648 | #endif /* CONFIG_SND_PCM_XRUN_DEBUG */ | |
649 | ||
1da177e4 LT |
650 | return 0; |
651 | } | |
746d4a02 | 652 | |
877211f5 | 653 | static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) |
1da177e4 | 654 | { |
746d4a02 TI |
655 | snd_info_free_entry(substream->proc_info_entry); |
656 | substream->proc_info_entry = NULL; | |
657 | snd_info_free_entry(substream->proc_hw_params_entry); | |
658 | substream->proc_hw_params_entry = NULL; | |
659 | snd_info_free_entry(substream->proc_sw_params_entry); | |
660 | substream->proc_sw_params_entry = NULL; | |
661 | snd_info_free_entry(substream->proc_status_entry); | |
662 | substream->proc_status_entry = NULL; | |
2b30d411 TI |
663 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
664 | snd_info_free_entry(substream->proc_xrun_injection_entry); | |
665 | substream->proc_xrun_injection_entry = NULL; | |
666 | #endif | |
746d4a02 TI |
667 | snd_info_free_entry(substream->proc_root); |
668 | substream->proc_root = NULL; | |
1da177e4 LT |
669 | return 0; |
670 | } | |
b7d90a35 | 671 | #else /* !CONFIG_SND_VERBOSE_PROCFS */ |
e28563cc TI |
672 | static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; } |
673 | static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; } | |
674 | static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; } | |
675 | static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; } | |
b7d90a35 | 676 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
1da177e4 | 677 | |
ef46c7af TI |
678 | static const struct attribute_group *pcm_dev_attr_groups[]; |
679 | ||
1da177e4 LT |
680 | /** |
681 | * snd_pcm_new_stream - create a new PCM stream | |
682 | * @pcm: the pcm instance | |
683 | * @stream: the stream direction, SNDRV_PCM_STREAM_XXX | |
684 | * @substream_count: the number of substreams | |
685 | * | |
686 | * Creates a new stream for the pcm. | |
687 | * The corresponding stream on the pcm must have been empty before | |
688 | * calling this, i.e. zero must be given to the argument of | |
689 | * snd_pcm_new(). | |
690 | * | |
eb7c06e8 | 691 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 692 | */ |
877211f5 | 693 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count) |
1da177e4 LT |
694 | { |
695 | int idx, err; | |
877211f5 TI |
696 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
697 | struct snd_pcm_substream *substream, *prev; | |
1da177e4 | 698 | |
8eeaa2f9 | 699 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1a60d4c5 | 700 | mutex_init(&pstr->oss.setup_mutex); |
1da177e4 LT |
701 | #endif |
702 | pstr->stream = stream; | |
703 | pstr->pcm = pcm; | |
704 | pstr->substream_count = substream_count; | |
ef46c7af TI |
705 | if (!substream_count) |
706 | return 0; | |
707 | ||
708 | snd_device_initialize(&pstr->dev, pcm->card); | |
709 | pstr->dev.groups = pcm_dev_attr_groups; | |
710 | dev_set_name(&pstr->dev, "pcmC%iD%i%c", pcm->card->number, pcm->device, | |
711 | stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); | |
712 | ||
713 | if (!pcm->internal) { | |
1da177e4 | 714 | err = snd_pcm_stream_proc_init(pstr); |
73e77ba0 | 715 | if (err < 0) { |
09e56df8 | 716 | pcm_err(pcm, "Error in snd_pcm_stream_proc_init\n"); |
1da177e4 | 717 | return err; |
73e77ba0 | 718 | } |
1da177e4 LT |
719 | } |
720 | prev = NULL; | |
721 | for (idx = 0, prev = NULL; idx < substream_count; idx++) { | |
ca2c0966 | 722 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
ec0e9937 | 723 | if (!substream) |
1da177e4 LT |
724 | return -ENOMEM; |
725 | substream->pcm = pcm; | |
726 | substream->pstr = pstr; | |
727 | substream->number = idx; | |
728 | substream->stream = stream; | |
729 | sprintf(substream->name, "subdevice #%i", idx); | |
730 | substream->buffer_bytes_max = UINT_MAX; | |
731 | if (prev == NULL) | |
732 | pstr->substream = substream; | |
733 | else | |
734 | prev->next = substream; | |
945e5038 LG |
735 | |
736 | if (!pcm->internal) { | |
737 | err = snd_pcm_substream_proc_init(substream); | |
738 | if (err < 0) { | |
09e56df8 TI |
739 | pcm_err(pcm, |
740 | "Error in snd_pcm_stream_proc_init\n"); | |
945e5038 LG |
741 | if (prev == NULL) |
742 | pstr->substream = NULL; | |
743 | else | |
744 | prev->next = NULL; | |
745 | kfree(substream); | |
746 | return err; | |
747 | } | |
1da177e4 LT |
748 | } |
749 | substream->group = &substream->self_group; | |
750 | spin_lock_init(&substream->self_group.lock); | |
257f8cce | 751 | mutex_init(&substream->self_group.mutex); |
1da177e4 LT |
752 | INIT_LIST_HEAD(&substream->self_group.substreams); |
753 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
9c323fcb | 754 | atomic_set(&substream->mmap_count, 0); |
1da177e4 LT |
755 | prev = substream; |
756 | } | |
757 | return 0; | |
758 | } | |
e88e8ae6 TI |
759 | EXPORT_SYMBOL(snd_pcm_new_stream); |
760 | ||
945e5038 LG |
761 | static int _snd_pcm_new(struct snd_card *card, const char *id, int device, |
762 | int playback_count, int capture_count, bool internal, | |
763 | struct snd_pcm **rpcm) | |
1da177e4 | 764 | { |
877211f5 | 765 | struct snd_pcm *pcm; |
1da177e4 | 766 | int err; |
877211f5 | 767 | static struct snd_device_ops ops = { |
1da177e4 LT |
768 | .dev_free = snd_pcm_dev_free, |
769 | .dev_register = snd_pcm_dev_register, | |
770 | .dev_disconnect = snd_pcm_dev_disconnect, | |
1da177e4 LT |
771 | }; |
772 | ||
7eaa943c TI |
773 | if (snd_BUG_ON(!card)) |
774 | return -ENXIO; | |
775 | if (rpcm) | |
776 | *rpcm = NULL; | |
ca2c0966 | 777 | pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); |
ec0e9937 | 778 | if (!pcm) |
1da177e4 LT |
779 | return -ENOMEM; |
780 | pcm->card = card; | |
781 | pcm->device = device; | |
945e5038 | 782 | pcm->internal = internal; |
b95bd3a4 TI |
783 | mutex_init(&pcm->open_mutex); |
784 | init_waitqueue_head(&pcm->open_wait); | |
785 | INIT_LIST_HEAD(&pcm->list); | |
73e77ba0 | 786 | if (id) |
1da177e4 | 787 | strlcpy(pcm->id, id, sizeof(pcm->id)); |
1da177e4 LT |
788 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) { |
789 | snd_pcm_free(pcm); | |
790 | return err; | |
791 | } | |
792 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) { | |
793 | snd_pcm_free(pcm); | |
794 | return err; | |
795 | } | |
1da177e4 LT |
796 | if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) { |
797 | snd_pcm_free(pcm); | |
798 | return err; | |
799 | } | |
7eaa943c TI |
800 | if (rpcm) |
801 | *rpcm = pcm; | |
1da177e4 LT |
802 | return 0; |
803 | } | |
804 | ||
945e5038 LG |
805 | /** |
806 | * snd_pcm_new - create a new PCM instance | |
807 | * @card: the card instance | |
808 | * @id: the id string | |
809 | * @device: the device index (zero based) | |
810 | * @playback_count: the number of substreams for playback | |
811 | * @capture_count: the number of substreams for capture | |
812 | * @rpcm: the pointer to store the new pcm instance | |
813 | * | |
814 | * Creates a new PCM instance. | |
815 | * | |
816 | * The pcm operators have to be set afterwards to the new instance | |
817 | * via snd_pcm_set_ops(). | |
818 | * | |
eb7c06e8 | 819 | * Return: Zero if successful, or a negative error code on failure. |
945e5038 LG |
820 | */ |
821 | int snd_pcm_new(struct snd_card *card, const char *id, int device, | |
822 | int playback_count, int capture_count, struct snd_pcm **rpcm) | |
823 | { | |
824 | return _snd_pcm_new(card, id, device, playback_count, capture_count, | |
825 | false, rpcm); | |
826 | } | |
e88e8ae6 TI |
827 | EXPORT_SYMBOL(snd_pcm_new); |
828 | ||
945e5038 LG |
829 | /** |
830 | * snd_pcm_new_internal - create a new internal PCM instance | |
831 | * @card: the card instance | |
832 | * @id: the id string | |
833 | * @device: the device index (zero based - shared with normal PCMs) | |
834 | * @playback_count: the number of substreams for playback | |
835 | * @capture_count: the number of substreams for capture | |
836 | * @rpcm: the pointer to store the new pcm instance | |
837 | * | |
838 | * Creates a new internal PCM instance with no userspace device or procfs | |
839 | * entries. This is used by ASoC Back End PCMs in order to create a PCM that | |
840 | * will only be used internally by kernel drivers. i.e. it cannot be opened | |
841 | * by userspace. It provides existing ASoC components drivers with a substream | |
842 | * and access to any private data. | |
843 | * | |
844 | * The pcm operators have to be set afterwards to the new instance | |
845 | * via snd_pcm_set_ops(). | |
846 | * | |
eb7c06e8 | 847 | * Return: Zero if successful, or a negative error code on failure. |
945e5038 LG |
848 | */ |
849 | int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, | |
850 | int playback_count, int capture_count, | |
851 | struct snd_pcm **rpcm) | |
852 | { | |
853 | return _snd_pcm_new(card, id, device, playback_count, capture_count, | |
854 | true, rpcm); | |
855 | } | |
856 | EXPORT_SYMBOL(snd_pcm_new_internal); | |
857 | ||
a8ff48cb TI |
858 | static void free_chmap(struct snd_pcm_str *pstr) |
859 | { | |
860 | if (pstr->chmap_kctl) { | |
861 | snd_ctl_remove(pstr->pcm->card, pstr->chmap_kctl); | |
862 | pstr->chmap_kctl = NULL; | |
863 | } | |
864 | } | |
865 | ||
877211f5 | 866 | static void snd_pcm_free_stream(struct snd_pcm_str * pstr) |
1da177e4 | 867 | { |
877211f5 | 868 | struct snd_pcm_substream *substream, *substream_next; |
8eeaa2f9 | 869 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
877211f5 | 870 | struct snd_pcm_oss_setup *setup, *setupn; |
1da177e4 LT |
871 | #endif |
872 | substream = pstr->substream; | |
873 | while (substream) { | |
874 | substream_next = substream->next; | |
c461482c | 875 | snd_pcm_timer_done(substream); |
1da177e4 LT |
876 | snd_pcm_substream_proc_done(substream); |
877 | kfree(substream); | |
878 | substream = substream_next; | |
879 | } | |
880 | snd_pcm_stream_proc_done(pstr); | |
8eeaa2f9 | 881 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
882 | for (setup = pstr->oss.setup_list; setup; setup = setupn) { |
883 | setupn = setup->next; | |
884 | kfree(setup->task_name); | |
885 | kfree(setup); | |
886 | } | |
887 | #endif | |
a8ff48cb | 888 | free_chmap(pstr); |
ef46c7af TI |
889 | if (pstr->substream_count) |
890 | put_device(&pstr->dev); | |
1da177e4 LT |
891 | } |
892 | ||
58f30d65 TI |
893 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
894 | #define pcm_call_notify(pcm, call) \ | |
895 | do { \ | |
896 | struct snd_pcm_notify *_notify; \ | |
897 | list_for_each_entry(_notify, &snd_pcm_notify_list, list) \ | |
898 | _notify->call(pcm); \ | |
899 | } while (0) | |
900 | #else | |
9aee03f3 | 901 | #define pcm_call_notify(pcm, call) do {} while (0) |
58f30d65 TI |
902 | #endif |
903 | ||
877211f5 | 904 | static int snd_pcm_free(struct snd_pcm *pcm) |
1da177e4 | 905 | { |
7eaa943c TI |
906 | if (!pcm) |
907 | return 0; | |
58f30d65 TI |
908 | if (!pcm->internal) |
909 | pcm_call_notify(pcm, n_unregister); | |
1da177e4 LT |
910 | if (pcm->private_free) |
911 | pcm->private_free(pcm); | |
912 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
913 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]); | |
914 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]); | |
915 | kfree(pcm); | |
916 | return 0; | |
917 | } | |
918 | ||
877211f5 | 919 | static int snd_pcm_dev_free(struct snd_device *device) |
1da177e4 | 920 | { |
877211f5 | 921 | struct snd_pcm *pcm = device->device_data; |
1da177e4 LT |
922 | return snd_pcm_free(pcm); |
923 | } | |
924 | ||
3bf75f9b TI |
925 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, |
926 | struct file *file, | |
927 | struct snd_pcm_substream **rsubstream) | |
1da177e4 | 928 | { |
877211f5 TI |
929 | struct snd_pcm_str * pstr; |
930 | struct snd_pcm_substream *substream; | |
931 | struct snd_pcm_runtime *runtime; | |
877211f5 | 932 | struct snd_card *card; |
23c18d4b | 933 | int prefer_subdevice; |
1da177e4 LT |
934 | size_t size; |
935 | ||
7eaa943c TI |
936 | if (snd_BUG_ON(!pcm || !rsubstream)) |
937 | return -ENXIO; | |
ad876c86 TI |
938 | if (snd_BUG_ON(stream != SNDRV_PCM_STREAM_PLAYBACK && |
939 | stream != SNDRV_PCM_STREAM_CAPTURE)) | |
940 | return -EINVAL; | |
1da177e4 | 941 | *rsubstream = NULL; |
1da177e4 | 942 | pstr = &pcm->streams[stream]; |
3bf75f9b | 943 | if (pstr->substream == NULL || pstr->substream_count == 0) |
1da177e4 LT |
944 | return -ENODEV; |
945 | ||
946 | card = pcm->card; | |
23c18d4b | 947 | prefer_subdevice = snd_ctl_get_preferred_subdevice(card, SND_CTL_SUBDEV_PCM); |
1da177e4 | 948 | |
ad876c86 TI |
949 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { |
950 | int opposite = !stream; | |
951 | ||
952 | for (substream = pcm->streams[opposite].substream; substream; | |
953 | substream = substream->next) { | |
954 | if (SUBSTREAM_BUSY(substream)) | |
955 | return -EAGAIN; | |
1da177e4 | 956 | } |
1da177e4 LT |
957 | } |
958 | ||
0df63e44 TI |
959 | if (file->f_flags & O_APPEND) { |
960 | if (prefer_subdevice < 0) { | |
961 | if (pstr->substream_count > 1) | |
962 | return -EINVAL; /* must be unique */ | |
963 | substream = pstr->substream; | |
964 | } else { | |
965 | for (substream = pstr->substream; substream; | |
966 | substream = substream->next) | |
967 | if (substream->number == prefer_subdevice) | |
968 | break; | |
969 | } | |
970 | if (! substream) | |
971 | return -ENODEV; | |
972 | if (! SUBSTREAM_BUSY(substream)) | |
973 | return -EBADFD; | |
974 | substream->ref_count++; | |
975 | *rsubstream = substream; | |
976 | return 0; | |
977 | } | |
978 | ||
ad876c86 TI |
979 | for (substream = pstr->substream; substream; substream = substream->next) { |
980 | if (!SUBSTREAM_BUSY(substream) && | |
981 | (prefer_subdevice == -1 || | |
982 | substream->number == prefer_subdevice)) | |
1da177e4 | 983 | break; |
ad876c86 | 984 | } |
1da177e4 LT |
985 | if (substream == NULL) |
986 | return -EAGAIN; | |
987 | ||
ca2c0966 | 988 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
1da177e4 LT |
989 | if (runtime == NULL) |
990 | return -ENOMEM; | |
991 | ||
877211f5 | 992 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)); |
1da177e4 LT |
993 | runtime->status = snd_malloc_pages(size, GFP_KERNEL); |
994 | if (runtime->status == NULL) { | |
995 | kfree(runtime); | |
996 | return -ENOMEM; | |
997 | } | |
998 | memset((void*)runtime->status, 0, size); | |
999 | ||
877211f5 | 1000 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)); |
1da177e4 LT |
1001 | runtime->control = snd_malloc_pages(size, GFP_KERNEL); |
1002 | if (runtime->control == NULL) { | |
877211f5 TI |
1003 | snd_free_pages((void*)runtime->status, |
1004 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
1da177e4 LT |
1005 | kfree(runtime); |
1006 | return -ENOMEM; | |
1007 | } | |
1008 | memset((void*)runtime->control, 0, size); | |
1009 | ||
1010 | init_waitqueue_head(&runtime->sleep); | |
c91a988d | 1011 | init_waitqueue_head(&runtime->tsleep); |
1da177e4 LT |
1012 | |
1013 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
1014 | ||
1015 | substream->runtime = runtime; | |
1016 | substream->private_data = pcm->private_data; | |
0df63e44 TI |
1017 | substream->ref_count = 1; |
1018 | substream->f_flags = file->f_flags; | |
e7373b70 | 1019 | substream->pid = get_pid(task_pid(current)); |
1da177e4 LT |
1020 | pstr->substream_opened++; |
1021 | *rsubstream = substream; | |
1022 | return 0; | |
1023 | } | |
1024 | ||
3bf75f9b | 1025 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream) |
1da177e4 | 1026 | { |
877211f5 | 1027 | struct snd_pcm_runtime *runtime; |
0df63e44 | 1028 | |
7eaa943c TI |
1029 | if (PCM_RUNTIME_CHECK(substream)) |
1030 | return; | |
1da177e4 | 1031 | runtime = substream->runtime; |
1da177e4 LT |
1032 | if (runtime->private_free != NULL) |
1033 | runtime->private_free(runtime); | |
877211f5 TI |
1034 | snd_free_pages((void*)runtime->status, |
1035 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
1036 | snd_free_pages((void*)runtime->control, | |
1037 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))); | |
1da177e4 LT |
1038 | kfree(runtime->hw_constraints.rules); |
1039 | kfree(runtime); | |
1040 | substream->runtime = NULL; | |
e7373b70 CL |
1041 | put_pid(substream->pid); |
1042 | substream->pid = NULL; | |
1da177e4 LT |
1043 | substream->pstr->substream_opened--; |
1044 | } | |
1045 | ||
d80f19fa GKH |
1046 | static ssize_t show_pcm_class(struct device *dev, |
1047 | struct device_attribute *attr, char *buf) | |
9d19f48c | 1048 | { |
60b93030 TI |
1049 | struct snd_pcm_str *pstr = container_of(dev, struct snd_pcm_str, dev); |
1050 | struct snd_pcm *pcm = pstr->pcm; | |
9d19f48c TI |
1051 | const char *str; |
1052 | static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = { | |
1053 | [SNDRV_PCM_CLASS_GENERIC] = "generic", | |
1054 | [SNDRV_PCM_CLASS_MULTI] = "multi", | |
1055 | [SNDRV_PCM_CLASS_MODEM] = "modem", | |
1056 | [SNDRV_PCM_CLASS_DIGITIZER] = "digitizer", | |
1057 | }; | |
1058 | ||
60b93030 | 1059 | if (pcm->dev_class > SNDRV_PCM_CLASS_LAST) |
9d19f48c TI |
1060 | str = "none"; |
1061 | else | |
1062 | str = strs[pcm->dev_class]; | |
1063 | return snprintf(buf, PAGE_SIZE, "%s\n", str); | |
1064 | } | |
1065 | ||
caa751ba TI |
1066 | static DEVICE_ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL); |
1067 | static struct attribute *pcm_dev_attrs[] = { | |
1068 | &dev_attr_pcm_class.attr, | |
1069 | NULL | |
1070 | }; | |
1071 | ||
343fe850 | 1072 | static const struct attribute_group pcm_dev_attr_group = { |
caa751ba TI |
1073 | .attrs = pcm_dev_attrs, |
1074 | }; | |
1075 | ||
1076 | static const struct attribute_group *pcm_dev_attr_groups[] = { | |
1077 | &pcm_dev_attr_group, | |
1078 | NULL | |
1079 | }; | |
9d19f48c | 1080 | |
877211f5 | 1081 | static int snd_pcm_dev_register(struct snd_device *device) |
1da177e4 | 1082 | { |
f87135f5 | 1083 | int cidx, err; |
877211f5 | 1084 | struct snd_pcm_substream *substream; |
4b3be6af | 1085 | struct snd_pcm *pcm; |
1da177e4 | 1086 | |
4b3be6af | 1087 | if (snd_BUG_ON(!device || !device->device_data)) |
7eaa943c | 1088 | return -ENXIO; |
4b3be6af | 1089 | pcm = device->device_data; |
b95bd3a4 TI |
1090 | if (pcm->internal) |
1091 | return 0; | |
1092 | ||
1a60d4c5 | 1093 | mutex_lock(®ister_mutex); |
f90c06a2 | 1094 | err = snd_pcm_add(pcm); |
b95bd3a4 TI |
1095 | if (err) |
1096 | goto unlock; | |
1da177e4 LT |
1097 | for (cidx = 0; cidx < 2; cidx++) { |
1098 | int devtype = -1; | |
b95bd3a4 | 1099 | if (pcm->streams[cidx].substream == NULL) |
1da177e4 LT |
1100 | continue; |
1101 | switch (cidx) { | |
1102 | case SNDRV_PCM_STREAM_PLAYBACK: | |
1da177e4 LT |
1103 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
1104 | break; | |
1105 | case SNDRV_PCM_STREAM_CAPTURE: | |
1da177e4 LT |
1106 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
1107 | break; | |
1108 | } | |
c78085fc | 1109 | /* register pcm */ |
40a4b263 TI |
1110 | err = snd_register_device(devtype, pcm->card, pcm->device, |
1111 | &snd_pcm_f_ops[cidx], pcm, | |
1112 | &pcm->streams[cidx].dev); | |
c78085fc | 1113 | if (err < 0) { |
b95bd3a4 TI |
1114 | list_del_init(&pcm->list); |
1115 | goto unlock; | |
1da177e4 | 1116 | } |
caa751ba | 1117 | |
1da177e4 LT |
1118 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
1119 | snd_pcm_timer_init(substream); | |
1120 | } | |
9244b2c3 | 1121 | |
58f30d65 | 1122 | pcm_call_notify(pcm, n_register); |
9244b2c3 | 1123 | |
b95bd3a4 | 1124 | unlock: |
1a60d4c5 | 1125 | mutex_unlock(®ister_mutex); |
b95bd3a4 | 1126 | return err; |
1da177e4 LT |
1127 | } |
1128 | ||
877211f5 | 1129 | static int snd_pcm_dev_disconnect(struct snd_device *device) |
1da177e4 | 1130 | { |
877211f5 | 1131 | struct snd_pcm *pcm = device->device_data; |
877211f5 | 1132 | struct snd_pcm_substream *substream; |
40a4b263 | 1133 | int cidx; |
1da177e4 | 1134 | |
1a60d4c5 | 1135 | mutex_lock(®ister_mutex); |
9b0573c0 | 1136 | mutex_lock(&pcm->open_mutex); |
0914f796 | 1137 | wake_up(&pcm->open_wait); |
f87135f5 | 1138 | list_del_init(&pcm->list); |
646e1dd8 | 1139 | for (cidx = 0; cidx < 2; cidx++) { |
9b0573c0 TI |
1140 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) { |
1141 | snd_pcm_stream_lock_irq(substream); | |
0914f796 | 1142 | if (substream->runtime) { |
1da177e4 | 1143 | substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED; |
0914f796 TI |
1144 | wake_up(&substream->runtime->sleep); |
1145 | wake_up(&substream->runtime->tsleep); | |
1146 | } | |
9b0573c0 TI |
1147 | snd_pcm_stream_unlock_irq(substream); |
1148 | } | |
646e1dd8 TI |
1149 | } |
1150 | if (!pcm->internal) { | |
58f30d65 | 1151 | pcm_call_notify(pcm, n_disconnect); |
1da177e4 | 1152 | } |
1da177e4 | 1153 | for (cidx = 0; cidx < 2; cidx++) { |
b2022138 TI |
1154 | if (!pcm->internal) |
1155 | snd_unregister_device(&pcm->streams[cidx].dev); | |
a8ff48cb | 1156 | free_chmap(&pcm->streams[cidx]); |
1da177e4 | 1157 | } |
9b0573c0 | 1158 | mutex_unlock(&pcm->open_mutex); |
1a60d4c5 | 1159 | mutex_unlock(®ister_mutex); |
c461482c | 1160 | return 0; |
1da177e4 LT |
1161 | } |
1162 | ||
58f30d65 | 1163 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
30b771cf TI |
1164 | /** |
1165 | * snd_pcm_notify - Add/remove the notify list | |
1166 | * @notify: PCM notify list | |
1167 | * @nfree: 0 = register, 1 = unregister | |
1168 | * | |
1169 | * This adds the given notifier to the global list so that the callback is | |
1170 | * called for each registered PCM devices. This exists only for PCM OSS | |
1171 | * emulation, so far. | |
1172 | */ | |
877211f5 | 1173 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree) |
1da177e4 | 1174 | { |
9244b2c3 | 1175 | struct snd_pcm *pcm; |
1da177e4 | 1176 | |
7eaa943c TI |
1177 | if (snd_BUG_ON(!notify || |
1178 | !notify->n_register || | |
1179 | !notify->n_unregister || | |
1180 | !notify->n_disconnect)) | |
1181 | return -EINVAL; | |
1a60d4c5 | 1182 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1183 | if (nfree) { |
1184 | list_del(¬ify->list); | |
9244b2c3 JB |
1185 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1186 | notify->n_unregister(pcm); | |
1da177e4 LT |
1187 | } else { |
1188 | list_add_tail(¬ify->list, &snd_pcm_notify_list); | |
9244b2c3 JB |
1189 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1190 | notify->n_register(pcm); | |
1da177e4 | 1191 | } |
1a60d4c5 | 1192 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1193 | return 0; |
1194 | } | |
e88e8ae6 | 1195 | EXPORT_SYMBOL(snd_pcm_notify); |
58f30d65 | 1196 | #endif /* CONFIG_SND_PCM_OSS */ |
e88e8ae6 | 1197 | |
cd6a6503 | 1198 | #ifdef CONFIG_SND_PROC_FS |
1da177e4 LT |
1199 | /* |
1200 | * Info interface | |
1201 | */ | |
1202 | ||
877211f5 TI |
1203 | static void snd_pcm_proc_read(struct snd_info_entry *entry, |
1204 | struct snd_info_buffer *buffer) | |
1da177e4 | 1205 | { |
877211f5 | 1206 | struct snd_pcm *pcm; |
1da177e4 | 1207 | |
1a60d4c5 | 1208 | mutex_lock(®ister_mutex); |
9244b2c3 | 1209 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
f87135f5 CL |
1210 | snd_iprintf(buffer, "%02i-%02i: %s : %s", |
1211 | pcm->card->number, pcm->device, pcm->id, pcm->name); | |
1da177e4 | 1212 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) |
877211f5 TI |
1213 | snd_iprintf(buffer, " : playback %i", |
1214 | pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count); | |
1da177e4 | 1215 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) |
877211f5 TI |
1216 | snd_iprintf(buffer, " : capture %i", |
1217 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); | |
1da177e4 LT |
1218 | snd_iprintf(buffer, "\n"); |
1219 | } | |
1a60d4c5 | 1220 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1221 | } |
1222 | ||
6581f4e7 | 1223 | static struct snd_info_entry *snd_pcm_proc_entry; |
1da177e4 | 1224 | |
e28563cc | 1225 | static void snd_pcm_proc_init(void) |
1da177e4 | 1226 | { |
877211f5 | 1227 | struct snd_info_entry *entry; |
1da177e4 | 1228 | |
1da177e4 | 1229 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) { |
bf850204 | 1230 | snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read); |
1da177e4 LT |
1231 | if (snd_info_register(entry) < 0) { |
1232 | snd_info_free_entry(entry); | |
1233 | entry = NULL; | |
1234 | } | |
1235 | } | |
1236 | snd_pcm_proc_entry = entry; | |
e28563cc TI |
1237 | } |
1238 | ||
1239 | static void snd_pcm_proc_done(void) | |
1240 | { | |
746d4a02 | 1241 | snd_info_free_entry(snd_pcm_proc_entry); |
e28563cc TI |
1242 | } |
1243 | ||
cd6a6503 | 1244 | #else /* !CONFIG_SND_PROC_FS */ |
e28563cc TI |
1245 | #define snd_pcm_proc_init() |
1246 | #define snd_pcm_proc_done() | |
cd6a6503 | 1247 | #endif /* CONFIG_SND_PROC_FS */ |
e28563cc TI |
1248 | |
1249 | ||
1250 | /* | |
1251 | * ENTRY functions | |
1252 | */ | |
1253 | ||
1254 | static int __init alsa_pcm_init(void) | |
1255 | { | |
1256 | snd_ctl_register_ioctl(snd_pcm_control_ioctl); | |
1257 | snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl); | |
1258 | snd_pcm_proc_init(); | |
1da177e4 LT |
1259 | return 0; |
1260 | } | |
1261 | ||
1262 | static void __exit alsa_pcm_exit(void) | |
1263 | { | |
1264 | snd_ctl_unregister_ioctl(snd_pcm_control_ioctl); | |
1265 | snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl); | |
e28563cc | 1266 | snd_pcm_proc_done(); |
1da177e4 LT |
1267 | } |
1268 | ||
1269 | module_init(alsa_pcm_init) | |
1270 | module_exit(alsa_pcm_exit) |