Commit | Line | Data |
---|---|---|
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 | ||
c1017a4c | 34 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); |
1da177e4 LT |
35 | MODULE_DESCRIPTION("Midlevel PCM code for ALSA."); |
36 | MODULE_LICENSE("GPL"); | |
37 | ||
f87135f5 | 38 | static LIST_HEAD(snd_pcm_devices); |
1da177e4 | 39 | static LIST_HEAD(snd_pcm_notify_list); |
1a60d4c5 | 40 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 41 | |
877211f5 TI |
42 | static int snd_pcm_free(struct snd_pcm *pcm); |
43 | static int snd_pcm_dev_free(struct snd_device *device); | |
44 | static int snd_pcm_dev_register(struct snd_device *device); | |
45 | static int snd_pcm_dev_disconnect(struct snd_device *device); | |
1da177e4 | 46 | |
f90c06a2 | 47 | static struct snd_pcm *snd_pcm_get(struct snd_card *card, int device) |
f87135f5 | 48 | { |
f87135f5 CL |
49 | struct snd_pcm *pcm; |
50 | ||
9244b2c3 | 51 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
f87135f5 CL |
52 | if (pcm->card == card && pcm->device == device) |
53 | return pcm; | |
54 | } | |
55 | return NULL; | |
56 | } | |
57 | ||
f90c06a2 PM |
58 | static int snd_pcm_next(struct snd_card *card, int device) |
59 | { | |
60 | struct snd_pcm *pcm; | |
61 | ||
62 | list_for_each_entry(pcm, &snd_pcm_devices, list) { | |
63 | if (pcm->card == card && pcm->device > device) | |
64 | return pcm->device; | |
65 | else if (pcm->card->number > card->number) | |
66 | return -1; | |
67 | } | |
68 | return -1; | |
69 | } | |
70 | ||
71 | static int snd_pcm_add(struct snd_pcm *newpcm) | |
72 | { | |
73 | struct snd_pcm *pcm; | |
74 | ||
b95bd3a4 TI |
75 | if (newpcm->internal) |
76 | return 0; | |
77 | ||
f90c06a2 PM |
78 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
79 | if (pcm->card == newpcm->card && pcm->device == newpcm->device) | |
80 | return -EBUSY; | |
81 | if (pcm->card->number > newpcm->card->number || | |
82 | (pcm->card == newpcm->card && | |
83 | pcm->device > newpcm->device)) { | |
84 | list_add(&newpcm->list, pcm->list.prev); | |
85 | return 0; | |
86 | } | |
87 | } | |
88 | list_add_tail(&newpcm->list, &snd_pcm_devices); | |
89 | return 0; | |
90 | } | |
91 | ||
877211f5 TI |
92 | static int snd_pcm_control_ioctl(struct snd_card *card, |
93 | struct snd_ctl_file *control, | |
1da177e4 LT |
94 | unsigned int cmd, unsigned long arg) |
95 | { | |
1da177e4 LT |
96 | switch (cmd) { |
97 | case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE: | |
98 | { | |
99 | int device; | |
100 | ||
101 | if (get_user(device, (int __user *)arg)) | |
102 | return -EFAULT; | |
1a60d4c5 | 103 | mutex_lock(®ister_mutex); |
f90c06a2 | 104 | device = snd_pcm_next(card, device); |
1a60d4c5 | 105 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
106 | if (put_user(device, (int __user *)arg)) |
107 | return -EFAULT; | |
108 | return 0; | |
109 | } | |
110 | case SNDRV_CTL_IOCTL_PCM_INFO: | |
111 | { | |
877211f5 | 112 | struct snd_pcm_info __user *info; |
1da177e4 | 113 | unsigned int device, subdevice; |
877211f5 TI |
114 | int stream; |
115 | struct snd_pcm *pcm; | |
116 | struct snd_pcm_str *pstr; | |
117 | struct snd_pcm_substream *substream; | |
f87135f5 CL |
118 | int err; |
119 | ||
877211f5 | 120 | info = (struct snd_pcm_info __user *)arg; |
1da177e4 LT |
121 | if (get_user(device, &info->device)) |
122 | return -EFAULT; | |
1da177e4 LT |
123 | if (get_user(stream, &info->stream)) |
124 | return -EFAULT; | |
125 | if (stream < 0 || stream > 1) | |
126 | return -EINVAL; | |
1da177e4 LT |
127 | if (get_user(subdevice, &info->subdevice)) |
128 | return -EFAULT; | |
1a60d4c5 | 129 | mutex_lock(®ister_mutex); |
f90c06a2 | 130 | pcm = snd_pcm_get(card, device); |
f87135f5 CL |
131 | if (pcm == NULL) { |
132 | err = -ENXIO; | |
133 | goto _error; | |
134 | } | |
135 | pstr = &pcm->streams[stream]; | |
136 | if (pstr->substream_count == 0) { | |
137 | err = -ENOENT; | |
138 | goto _error; | |
139 | } | |
140 | if (subdevice >= pstr->substream_count) { | |
141 | err = -ENXIO; | |
142 | goto _error; | |
143 | } | |
144 | for (substream = pstr->substream; substream; | |
145 | substream = substream->next) | |
1da177e4 LT |
146 | if (substream->number == (int)subdevice) |
147 | break; | |
f87135f5 CL |
148 | if (substream == NULL) { |
149 | err = -ENXIO; | |
150 | goto _error; | |
151 | } | |
152 | err = snd_pcm_info_user(substream, info); | |
153 | _error: | |
1a60d4c5 | 154 | mutex_unlock(®ister_mutex); |
f87135f5 | 155 | return err; |
1da177e4 LT |
156 | } |
157 | case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE: | |
158 | { | |
159 | int val; | |
160 | ||
161 | if (get_user(val, (int __user *)arg)) | |
162 | return -EFAULT; | |
23c18d4b | 163 | control->preferred_subdevice[SND_CTL_SUBDEV_PCM] = val; |
1da177e4 LT |
164 | return 0; |
165 | } | |
166 | } | |
167 | return -ENOIOCTLCMD; | |
168 | } | |
21a3479a | 169 | |
1da177e4 | 170 | #define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v |
1da177e4 | 171 | |
1da177e4 LT |
172 | static char *snd_pcm_format_names[] = { |
173 | FORMAT(S8), | |
174 | FORMAT(U8), | |
175 | FORMAT(S16_LE), | |
176 | FORMAT(S16_BE), | |
177 | FORMAT(U16_LE), | |
178 | FORMAT(U16_BE), | |
179 | FORMAT(S24_LE), | |
180 | FORMAT(S24_BE), | |
181 | FORMAT(U24_LE), | |
182 | FORMAT(U24_BE), | |
183 | FORMAT(S32_LE), | |
184 | FORMAT(S32_BE), | |
185 | FORMAT(U32_LE), | |
186 | FORMAT(U32_BE), | |
187 | FORMAT(FLOAT_LE), | |
188 | FORMAT(FLOAT_BE), | |
189 | FORMAT(FLOAT64_LE), | |
190 | FORMAT(FLOAT64_BE), | |
191 | FORMAT(IEC958_SUBFRAME_LE), | |
192 | FORMAT(IEC958_SUBFRAME_BE), | |
193 | FORMAT(MU_LAW), | |
194 | FORMAT(A_LAW), | |
195 | FORMAT(IMA_ADPCM), | |
196 | FORMAT(MPEG), | |
197 | FORMAT(GSM), | |
198 | FORMAT(SPECIAL), | |
199 | FORMAT(S24_3LE), | |
200 | FORMAT(S24_3BE), | |
201 | FORMAT(U24_3LE), | |
202 | FORMAT(U24_3BE), | |
203 | FORMAT(S20_3LE), | |
204 | FORMAT(S20_3BE), | |
205 | FORMAT(U20_3LE), | |
206 | FORMAT(U20_3BE), | |
207 | FORMAT(S18_3LE), | |
208 | FORMAT(S18_3BE), | |
209 | FORMAT(U18_3LE), | |
210 | FORMAT(U18_3BE), | |
7a28826a DC |
211 | FORMAT(G723_24), |
212 | FORMAT(G723_24_1B), | |
213 | FORMAT(G723_40), | |
214 | FORMAT(G723_40_1B), | |
ef7a4f97 DM |
215 | FORMAT(DSD_U8), |
216 | FORMAT(DSD_U16_LE), | |
d4288d3f | 217 | FORMAT(DSD_U32_LE), |
d42472ec JL |
218 | FORMAT(DSD_U16_BE), |
219 | FORMAT(DSD_U32_BE), | |
1da177e4 LT |
220 | }; |
221 | ||
30b771cf TI |
222 | /** |
223 | * snd_pcm_format_name - Return a name string for the given PCM format | |
224 | * @format: PCM format | |
225 | */ | |
6e5265ec | 226 | const char *snd_pcm_format_name(snd_pcm_format_t format) |
e28563cc | 227 | { |
fea952e5 | 228 | if ((__force unsigned int)format >= ARRAY_SIZE(snd_pcm_format_names)) |
7a28826a | 229 | return "Unknown"; |
fea952e5 | 230 | return snd_pcm_format_names[(__force unsigned int)format]; |
e28563cc | 231 | } |
6e5265ec TI |
232 | EXPORT_SYMBOL_GPL(snd_pcm_format_name); |
233 | ||
234 | #ifdef CONFIG_SND_VERBOSE_PROCFS | |
235 | ||
236 | #define STATE(v) [SNDRV_PCM_STATE_##v] = #v | |
237 | #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v | |
238 | #define READY(v) [SNDRV_PCM_READY_##v] = #v | |
239 | #define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v | |
240 | #define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v | |
241 | #define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v | |
242 | #define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v | |
243 | #define START(v) [SNDRV_PCM_START_##v] = #v | |
244 | #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v | |
e28563cc | 245 | |
e28563cc TI |
246 | static char *snd_pcm_stream_names[] = { |
247 | STREAM(PLAYBACK), | |
248 | STREAM(CAPTURE), | |
249 | }; | |
250 | ||
251 | static char *snd_pcm_state_names[] = { | |
252 | STATE(OPEN), | |
253 | STATE(SETUP), | |
254 | STATE(PREPARED), | |
255 | STATE(RUNNING), | |
256 | STATE(XRUN), | |
257 | STATE(DRAINING), | |
258 | STATE(PAUSED), | |
259 | STATE(SUSPENDED), | |
260 | }; | |
261 | ||
262 | static char *snd_pcm_access_names[] = { | |
263 | ACCESS(MMAP_INTERLEAVED), | |
264 | ACCESS(MMAP_NONINTERLEAVED), | |
265 | ACCESS(MMAP_COMPLEX), | |
266 | ACCESS(RW_INTERLEAVED), | |
267 | ACCESS(RW_NONINTERLEAVED), | |
268 | }; | |
269 | ||
1da177e4 LT |
270 | static char *snd_pcm_subformat_names[] = { |
271 | SUBFORMAT(STD), | |
272 | }; | |
273 | ||
274 | static char *snd_pcm_tstamp_mode_names[] = { | |
275 | TSTAMP(NONE), | |
8c121586 | 276 | TSTAMP(ENABLE), |
1da177e4 LT |
277 | }; |
278 | ||
877211f5 | 279 | static const char *snd_pcm_stream_name(int stream) |
1da177e4 | 280 | { |
1da177e4 LT |
281 | return snd_pcm_stream_names[stream]; |
282 | } | |
283 | ||
284 | static const char *snd_pcm_access_name(snd_pcm_access_t access) | |
285 | { | |
fea952e5 | 286 | return snd_pcm_access_names[(__force int)access]; |
1da177e4 LT |
287 | } |
288 | ||
1da177e4 LT |
289 | static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat) |
290 | { | |
fea952e5 | 291 | return snd_pcm_subformat_names[(__force int)subformat]; |
1da177e4 LT |
292 | } |
293 | ||
877211f5 | 294 | static const char *snd_pcm_tstamp_mode_name(int mode) |
1da177e4 | 295 | { |
1da177e4 LT |
296 | return snd_pcm_tstamp_mode_names[mode]; |
297 | } | |
298 | ||
299 | static const char *snd_pcm_state_name(snd_pcm_state_t state) | |
300 | { | |
fea952e5 | 301 | return snd_pcm_state_names[(__force int)state]; |
1da177e4 LT |
302 | } |
303 | ||
8eeaa2f9 | 304 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 | 305 | #include <linux/soundcard.h> |
1a60d4c5 | 306 | |
1da177e4 LT |
307 | static const char *snd_pcm_oss_format_name(int format) |
308 | { | |
309 | switch (format) { | |
310 | case AFMT_MU_LAW: | |
311 | return "MU_LAW"; | |
312 | case AFMT_A_LAW: | |
313 | return "A_LAW"; | |
314 | case AFMT_IMA_ADPCM: | |
315 | return "IMA_ADPCM"; | |
316 | case AFMT_U8: | |
317 | return "U8"; | |
318 | case AFMT_S16_LE: | |
319 | return "S16_LE"; | |
320 | case AFMT_S16_BE: | |
321 | return "S16_BE"; | |
322 | case AFMT_S8: | |
323 | return "S8"; | |
324 | case AFMT_U16_LE: | |
325 | return "U16_LE"; | |
326 | case AFMT_U16_BE: | |
327 | return "U16_BE"; | |
328 | case AFMT_MPEG: | |
329 | return "MPEG"; | |
330 | default: | |
331 | return "unknown"; | |
332 | } | |
333 | } | |
334 | #endif | |
335 | ||
877211f5 TI |
336 | static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, |
337 | struct snd_info_buffer *buffer) | |
1da177e4 | 338 | { |
877211f5 | 339 | struct snd_pcm_info *info; |
1da177e4 LT |
340 | int err; |
341 | ||
7c22f1aa TI |
342 | if (! substream) |
343 | return; | |
1da177e4 LT |
344 | |
345 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
ec0e9937 | 346 | if (!info) |
1da177e4 | 347 | return; |
1da177e4 LT |
348 | |
349 | err = snd_pcm_info(substream, info); | |
350 | if (err < 0) { | |
351 | snd_iprintf(buffer, "error %d\n", err); | |
352 | kfree(info); | |
353 | return; | |
354 | } | |
355 | snd_iprintf(buffer, "card: %d\n", info->card); | |
356 | snd_iprintf(buffer, "device: %d\n", info->device); | |
357 | snd_iprintf(buffer, "subdevice: %d\n", info->subdevice); | |
358 | snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream)); | |
359 | snd_iprintf(buffer, "id: %s\n", info->id); | |
360 | snd_iprintf(buffer, "name: %s\n", info->name); | |
361 | snd_iprintf(buffer, "subname: %s\n", info->subname); | |
362 | snd_iprintf(buffer, "class: %d\n", info->dev_class); | |
363 | snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); | |
364 | snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); | |
365 | snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); | |
366 | kfree(info); | |
367 | } | |
368 | ||
877211f5 TI |
369 | static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry, |
370 | struct snd_info_buffer *buffer) | |
1da177e4 | 371 | { |
877211f5 TI |
372 | snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream, |
373 | buffer); | |
1da177e4 LT |
374 | } |
375 | ||
877211f5 TI |
376 | static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry, |
377 | struct snd_info_buffer *buffer) | |
1da177e4 | 378 | { |
9fe856e4 | 379 | snd_pcm_proc_info_read(entry->private_data, buffer); |
1da177e4 LT |
380 | } |
381 | ||
877211f5 TI |
382 | static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry, |
383 | struct snd_info_buffer *buffer) | |
1da177e4 | 384 | { |
877211f5 | 385 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 TI |
386 | struct snd_pcm_runtime *runtime; |
387 | ||
388 | mutex_lock(&substream->pcm->open_mutex); | |
389 | runtime = substream->runtime; | |
1da177e4 LT |
390 | if (!runtime) { |
391 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 392 | goto unlock; |
1da177e4 | 393 | } |
1da177e4 LT |
394 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
395 | snd_iprintf(buffer, "no setup\n"); | |
901d46d5 | 396 | goto unlock; |
1da177e4 LT |
397 | } |
398 | snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); | |
399 | snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); | |
400 | snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat)); | |
401 | snd_iprintf(buffer, "channels: %u\n", runtime->channels); | |
402 | snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den); | |
403 | snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size); | |
404 | snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size); | |
8eeaa2f9 | 405 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
406 | if (substream->oss.oss) { |
407 | snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format)); | |
408 | snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels); | |
409 | snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate); | |
410 | snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes); | |
411 | snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods); | |
412 | snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); | |
413 | } | |
414 | #endif | |
901d46d5 TI |
415 | unlock: |
416 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 LT |
417 | } |
418 | ||
877211f5 TI |
419 | static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, |
420 | struct snd_info_buffer *buffer) | |
1da177e4 | 421 | { |
877211f5 | 422 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 TI |
423 | struct snd_pcm_runtime *runtime; |
424 | ||
425 | mutex_lock(&substream->pcm->open_mutex); | |
426 | runtime = substream->runtime; | |
1da177e4 LT |
427 | if (!runtime) { |
428 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 429 | goto unlock; |
1da177e4 | 430 | } |
1da177e4 LT |
431 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
432 | snd_iprintf(buffer, "no setup\n"); | |
901d46d5 | 433 | goto unlock; |
1da177e4 LT |
434 | } |
435 | snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); | |
436 | snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); | |
1da177e4 | 437 | snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min); |
1da177e4 LT |
438 | snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold); |
439 | snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold); | |
440 | snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); | |
441 | snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); | |
442 | snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); | |
901d46d5 TI |
443 | unlock: |
444 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 LT |
445 | } |
446 | ||
877211f5 TI |
447 | static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, |
448 | struct snd_info_buffer *buffer) | |
1da177e4 | 449 | { |
877211f5 | 450 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 | 451 | struct snd_pcm_runtime *runtime; |
877211f5 | 452 | struct snd_pcm_status status; |
1da177e4 | 453 | int err; |
901d46d5 TI |
454 | |
455 | mutex_lock(&substream->pcm->open_mutex); | |
456 | runtime = substream->runtime; | |
1da177e4 LT |
457 | if (!runtime) { |
458 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 459 | goto unlock; |
1da177e4 LT |
460 | } |
461 | memset(&status, 0, sizeof(status)); | |
462 | err = snd_pcm_status(substream, &status); | |
463 | if (err < 0) { | |
464 | snd_iprintf(buffer, "error %d\n", err); | |
901d46d5 | 465 | goto unlock; |
1da177e4 LT |
466 | } |
467 | snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); | |
e7373b70 | 468 | snd_iprintf(buffer, "owner_pid : %d\n", pid_vnr(substream->pid)); |
1da177e4 LT |
469 | snd_iprintf(buffer, "trigger_time: %ld.%09ld\n", |
470 | status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec); | |
471 | snd_iprintf(buffer, "tstamp : %ld.%09ld\n", | |
472 | status.tstamp.tv_sec, status.tstamp.tv_nsec); | |
473 | snd_iprintf(buffer, "delay : %ld\n", status.delay); | |
474 | snd_iprintf(buffer, "avail : %ld\n", status.avail); | |
475 | snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max); | |
476 | snd_iprintf(buffer, "-----\n"); | |
477 | snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); | |
478 | snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); | |
901d46d5 TI |
479 | unlock: |
480 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 | 481 | } |
1da177e4 | 482 | |
61fb63c0 | 483 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
2b30d411 TI |
484 | static void snd_pcm_xrun_injection_write(struct snd_info_entry *entry, |
485 | struct snd_info_buffer *buffer) | |
486 | { | |
487 | struct snd_pcm_substream *substream = entry->private_data; | |
488 | struct snd_pcm_runtime *runtime; | |
489 | ||
490 | snd_pcm_stream_lock_irq(substream); | |
491 | runtime = substream->runtime; | |
492 | if (runtime && runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
493 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
494 | snd_pcm_stream_unlock_irq(substream); | |
495 | } | |
496 | ||
877211f5 TI |
497 | static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry, |
498 | struct snd_info_buffer *buffer) | |
1da177e4 | 499 | { |
877211f5 | 500 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
501 | snd_iprintf(buffer, "%d\n", pstr->xrun_debug); |
502 | } | |
503 | ||
877211f5 TI |
504 | static void snd_pcm_xrun_debug_write(struct snd_info_entry *entry, |
505 | struct snd_info_buffer *buffer) | |
1da177e4 | 506 | { |
877211f5 | 507 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
508 | char line[64]; |
509 | if (!snd_info_get_line(buffer, line, sizeof(line))) | |
510 | pstr->xrun_debug = simple_strtoul(line, NULL, 10); | |
511 | } | |
512 | #endif | |
513 | ||
877211f5 | 514 | static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) |
1da177e4 | 515 | { |
877211f5 TI |
516 | struct snd_pcm *pcm = pstr->pcm; |
517 | struct snd_info_entry *entry; | |
1da177e4 LT |
518 | char name[16]; |
519 | ||
520 | sprintf(name, "pcm%i%c", pcm->device, | |
521 | pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); | |
522 | if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL) | |
523 | return -ENOMEM; | |
524 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
525 | if (snd_info_register(entry) < 0) { | |
526 | snd_info_free_entry(entry); | |
527 | return -ENOMEM; | |
528 | } | |
529 | pstr->proc_root = entry; | |
530 | ||
531 | if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) { | |
bf850204 | 532 | snd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read); |
1da177e4 LT |
533 | if (snd_info_register(entry) < 0) { |
534 | snd_info_free_entry(entry); | |
535 | entry = NULL; | |
536 | } | |
537 | } | |
538 | pstr->proc_info_entry = entry; | |
539 | ||
61fb63c0 | 540 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
877211f5 TI |
541 | if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug", |
542 | pstr->proc_root)) != NULL) { | |
1da177e4 | 543 | entry->c.text.read = snd_pcm_xrun_debug_read; |
1da177e4 | 544 | entry->c.text.write = snd_pcm_xrun_debug_write; |
bd7bf042 | 545 | entry->mode |= S_IWUSR; |
1da177e4 LT |
546 | entry->private_data = pstr; |
547 | if (snd_info_register(entry) < 0) { | |
548 | snd_info_free_entry(entry); | |
549 | entry = NULL; | |
550 | } | |
551 | } | |
552 | pstr->proc_xrun_debug_entry = entry; | |
553 | #endif | |
554 | return 0; | |
555 | } | |
556 | ||
877211f5 | 557 | static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) |
1da177e4 | 558 | { |
61fb63c0 | 559 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
746d4a02 TI |
560 | snd_info_free_entry(pstr->proc_xrun_debug_entry); |
561 | pstr->proc_xrun_debug_entry = NULL; | |
1da177e4 | 562 | #endif |
746d4a02 TI |
563 | snd_info_free_entry(pstr->proc_info_entry); |
564 | pstr->proc_info_entry = NULL; | |
565 | snd_info_free_entry(pstr->proc_root); | |
566 | pstr->proc_root = NULL; | |
1da177e4 LT |
567 | return 0; |
568 | } | |
569 | ||
877211f5 | 570 | static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) |
1da177e4 | 571 | { |
877211f5 TI |
572 | struct snd_info_entry *entry; |
573 | struct snd_card *card; | |
1da177e4 LT |
574 | char name[16]; |
575 | ||
576 | card = substream->pcm->card; | |
577 | ||
578 | sprintf(name, "sub%i", substream->number); | |
579 | if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL) | |
580 | return -ENOMEM; | |
581 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
582 | if (snd_info_register(entry) < 0) { | |
583 | snd_info_free_entry(entry); | |
584 | return -ENOMEM; | |
585 | } | |
586 | substream->proc_root = entry; | |
587 | ||
588 | if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) { | |
bf850204 TI |
589 | snd_info_set_text_ops(entry, substream, |
590 | snd_pcm_substream_proc_info_read); | |
1da177e4 LT |
591 | if (snd_info_register(entry) < 0) { |
592 | snd_info_free_entry(entry); | |
593 | entry = NULL; | |
594 | } | |
595 | } | |
596 | substream->proc_info_entry = entry; | |
597 | ||
598 | if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
599 | snd_info_set_text_ops(entry, substream, |
600 | snd_pcm_substream_proc_hw_params_read); | |
1da177e4 LT |
601 | if (snd_info_register(entry) < 0) { |
602 | snd_info_free_entry(entry); | |
603 | entry = NULL; | |
604 | } | |
605 | } | |
606 | substream->proc_hw_params_entry = entry; | |
607 | ||
608 | if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
609 | snd_info_set_text_ops(entry, substream, |
610 | snd_pcm_substream_proc_sw_params_read); | |
1da177e4 LT |
611 | if (snd_info_register(entry) < 0) { |
612 | snd_info_free_entry(entry); | |
613 | entry = NULL; | |
614 | } | |
615 | } | |
616 | substream->proc_sw_params_entry = entry; | |
617 | ||
618 | if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) { | |
bf850204 TI |
619 | snd_info_set_text_ops(entry, substream, |
620 | snd_pcm_substream_proc_status_read); | |
1da177e4 LT |
621 | if (snd_info_register(entry) < 0) { |
622 | snd_info_free_entry(entry); | |
623 | entry = NULL; | |
624 | } | |
625 | } | |
626 | substream->proc_status_entry = entry; | |
627 | ||
2b30d411 TI |
628 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
629 | entry = snd_info_create_card_entry(card, "xrun_injection", | |
630 | substream->proc_root); | |
631 | if (entry) { | |
632 | entry->private_data = substream; | |
633 | entry->c.text.read = NULL; | |
634 | entry->c.text.write = snd_pcm_xrun_injection_write; | |
635 | entry->mode = S_IFREG | S_IWUSR; | |
636 | if (snd_info_register(entry) < 0) { | |
637 | snd_info_free_entry(entry); | |
638 | entry = NULL; | |
639 | } | |
640 | } | |
641 | substream->proc_xrun_injection_entry = entry; | |
642 | #endif /* CONFIG_SND_PCM_XRUN_DEBUG */ | |
643 | ||
1da177e4 LT |
644 | return 0; |
645 | } | |
746d4a02 | 646 | |
877211f5 | 647 | static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) |
1da177e4 | 648 | { |
746d4a02 TI |
649 | snd_info_free_entry(substream->proc_info_entry); |
650 | substream->proc_info_entry = NULL; | |
651 | snd_info_free_entry(substream->proc_hw_params_entry); | |
652 | substream->proc_hw_params_entry = NULL; | |
653 | snd_info_free_entry(substream->proc_sw_params_entry); | |
654 | substream->proc_sw_params_entry = NULL; | |
655 | snd_info_free_entry(substream->proc_status_entry); | |
656 | substream->proc_status_entry = NULL; | |
2b30d411 TI |
657 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
658 | snd_info_free_entry(substream->proc_xrun_injection_entry); | |
659 | substream->proc_xrun_injection_entry = NULL; | |
660 | #endif | |
746d4a02 TI |
661 | snd_info_free_entry(substream->proc_root); |
662 | substream->proc_root = NULL; | |
1da177e4 LT |
663 | return 0; |
664 | } | |
b7d90a35 | 665 | #else /* !CONFIG_SND_VERBOSE_PROCFS */ |
e28563cc TI |
666 | static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; } |
667 | static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; } | |
668 | static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; } | |
669 | static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; } | |
b7d90a35 | 670 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
1da177e4 | 671 | |
ef46c7af TI |
672 | static const struct attribute_group *pcm_dev_attr_groups[]; |
673 | ||
1da177e4 LT |
674 | /** |
675 | * snd_pcm_new_stream - create a new PCM stream | |
676 | * @pcm: the pcm instance | |
677 | * @stream: the stream direction, SNDRV_PCM_STREAM_XXX | |
678 | * @substream_count: the number of substreams | |
679 | * | |
680 | * Creates a new stream for the pcm. | |
681 | * The corresponding stream on the pcm must have been empty before | |
682 | * calling this, i.e. zero must be given to the argument of | |
683 | * snd_pcm_new(). | |
684 | * | |
eb7c06e8 | 685 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 686 | */ |
877211f5 | 687 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count) |
1da177e4 LT |
688 | { |
689 | int idx, err; | |
877211f5 TI |
690 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
691 | struct snd_pcm_substream *substream, *prev; | |
1da177e4 | 692 | |
8eeaa2f9 | 693 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1a60d4c5 | 694 | mutex_init(&pstr->oss.setup_mutex); |
1da177e4 LT |
695 | #endif |
696 | pstr->stream = stream; | |
697 | pstr->pcm = pcm; | |
698 | pstr->substream_count = substream_count; | |
ef46c7af TI |
699 | if (!substream_count) |
700 | return 0; | |
701 | ||
702 | snd_device_initialize(&pstr->dev, pcm->card); | |
703 | pstr->dev.groups = pcm_dev_attr_groups; | |
704 | dev_set_name(&pstr->dev, "pcmC%iD%i%c", pcm->card->number, pcm->device, | |
705 | stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); | |
706 | ||
707 | if (!pcm->internal) { | |
1da177e4 | 708 | err = snd_pcm_stream_proc_init(pstr); |
73e77ba0 | 709 | if (err < 0) { |
09e56df8 | 710 | pcm_err(pcm, "Error in snd_pcm_stream_proc_init\n"); |
1da177e4 | 711 | return err; |
73e77ba0 | 712 | } |
1da177e4 LT |
713 | } |
714 | prev = NULL; | |
715 | for (idx = 0, prev = NULL; idx < substream_count; idx++) { | |
ca2c0966 | 716 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
ec0e9937 | 717 | if (!substream) |
1da177e4 LT |
718 | return -ENOMEM; |
719 | substream->pcm = pcm; | |
720 | substream->pstr = pstr; | |
721 | substream->number = idx; | |
722 | substream->stream = stream; | |
723 | sprintf(substream->name, "subdevice #%i", idx); | |
724 | substream->buffer_bytes_max = UINT_MAX; | |
725 | if (prev == NULL) | |
726 | pstr->substream = substream; | |
727 | else | |
728 | prev->next = substream; | |
945e5038 LG |
729 | |
730 | if (!pcm->internal) { | |
731 | err = snd_pcm_substream_proc_init(substream); | |
732 | if (err < 0) { | |
09e56df8 TI |
733 | pcm_err(pcm, |
734 | "Error in snd_pcm_stream_proc_init\n"); | |
945e5038 LG |
735 | if (prev == NULL) |
736 | pstr->substream = NULL; | |
737 | else | |
738 | prev->next = NULL; | |
739 | kfree(substream); | |
740 | return err; | |
741 | } | |
1da177e4 LT |
742 | } |
743 | substream->group = &substream->self_group; | |
744 | spin_lock_init(&substream->self_group.lock); | |
257f8cce | 745 | mutex_init(&substream->self_group.mutex); |
1da177e4 LT |
746 | INIT_LIST_HEAD(&substream->self_group.substreams); |
747 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
9c323fcb | 748 | atomic_set(&substream->mmap_count, 0); |
1da177e4 LT |
749 | prev = substream; |
750 | } | |
751 | return 0; | |
752 | } | |
e88e8ae6 TI |
753 | EXPORT_SYMBOL(snd_pcm_new_stream); |
754 | ||
945e5038 LG |
755 | static int _snd_pcm_new(struct snd_card *card, const char *id, int device, |
756 | int playback_count, int capture_count, bool internal, | |
757 | struct snd_pcm **rpcm) | |
1da177e4 | 758 | { |
877211f5 | 759 | struct snd_pcm *pcm; |
1da177e4 | 760 | int err; |
877211f5 | 761 | static struct snd_device_ops ops = { |
1da177e4 LT |
762 | .dev_free = snd_pcm_dev_free, |
763 | .dev_register = snd_pcm_dev_register, | |
764 | .dev_disconnect = snd_pcm_dev_disconnect, | |
1da177e4 LT |
765 | }; |
766 | ||
7eaa943c TI |
767 | if (snd_BUG_ON(!card)) |
768 | return -ENXIO; | |
769 | if (rpcm) | |
770 | *rpcm = NULL; | |
ca2c0966 | 771 | pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); |
ec0e9937 | 772 | if (!pcm) |
1da177e4 LT |
773 | return -ENOMEM; |
774 | pcm->card = card; | |
775 | pcm->device = device; | |
945e5038 | 776 | pcm->internal = internal; |
b95bd3a4 TI |
777 | mutex_init(&pcm->open_mutex); |
778 | init_waitqueue_head(&pcm->open_wait); | |
779 | INIT_LIST_HEAD(&pcm->list); | |
73e77ba0 | 780 | if (id) |
1da177e4 | 781 | strlcpy(pcm->id, id, sizeof(pcm->id)); |
1da177e4 LT |
782 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) { |
783 | snd_pcm_free(pcm); | |
784 | return err; | |
785 | } | |
786 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) { | |
787 | snd_pcm_free(pcm); | |
788 | return err; | |
789 | } | |
1da177e4 LT |
790 | if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) { |
791 | snd_pcm_free(pcm); | |
792 | return err; | |
793 | } | |
7eaa943c TI |
794 | if (rpcm) |
795 | *rpcm = pcm; | |
1da177e4 LT |
796 | return 0; |
797 | } | |
798 | ||
945e5038 LG |
799 | /** |
800 | * snd_pcm_new - create a new PCM instance | |
801 | * @card: the card instance | |
802 | * @id: the id string | |
803 | * @device: the device index (zero based) | |
804 | * @playback_count: the number of substreams for playback | |
805 | * @capture_count: the number of substreams for capture | |
806 | * @rpcm: the pointer to store the new pcm instance | |
807 | * | |
808 | * Creates a new PCM instance. | |
809 | * | |
810 | * The pcm operators have to be set afterwards to the new instance | |
811 | * via snd_pcm_set_ops(). | |
812 | * | |
eb7c06e8 | 813 | * Return: Zero if successful, or a negative error code on failure. |
945e5038 LG |
814 | */ |
815 | int snd_pcm_new(struct snd_card *card, const char *id, int device, | |
816 | int playback_count, int capture_count, struct snd_pcm **rpcm) | |
817 | { | |
818 | return _snd_pcm_new(card, id, device, playback_count, capture_count, | |
819 | false, rpcm); | |
820 | } | |
e88e8ae6 TI |
821 | EXPORT_SYMBOL(snd_pcm_new); |
822 | ||
945e5038 LG |
823 | /** |
824 | * snd_pcm_new_internal - create a new internal PCM instance | |
825 | * @card: the card instance | |
826 | * @id: the id string | |
827 | * @device: the device index (zero based - shared with normal PCMs) | |
828 | * @playback_count: the number of substreams for playback | |
829 | * @capture_count: the number of substreams for capture | |
830 | * @rpcm: the pointer to store the new pcm instance | |
831 | * | |
832 | * Creates a new internal PCM instance with no userspace device or procfs | |
833 | * entries. This is used by ASoC Back End PCMs in order to create a PCM that | |
834 | * will only be used internally by kernel drivers. i.e. it cannot be opened | |
835 | * by userspace. It provides existing ASoC components drivers with a substream | |
836 | * and access to any private data. | |
837 | * | |
838 | * The pcm operators have to be set afterwards to the new instance | |
839 | * via snd_pcm_set_ops(). | |
840 | * | |
eb7c06e8 | 841 | * Return: Zero if successful, or a negative error code on failure. |
945e5038 LG |
842 | */ |
843 | int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, | |
844 | int playback_count, int capture_count, | |
845 | struct snd_pcm **rpcm) | |
846 | { | |
847 | return _snd_pcm_new(card, id, device, playback_count, capture_count, | |
848 | true, rpcm); | |
849 | } | |
850 | EXPORT_SYMBOL(snd_pcm_new_internal); | |
851 | ||
877211f5 | 852 | static void snd_pcm_free_stream(struct snd_pcm_str * pstr) |
1da177e4 | 853 | { |
877211f5 | 854 | struct snd_pcm_substream *substream, *substream_next; |
8eeaa2f9 | 855 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
877211f5 | 856 | struct snd_pcm_oss_setup *setup, *setupn; |
1da177e4 LT |
857 | #endif |
858 | substream = pstr->substream; | |
859 | while (substream) { | |
860 | substream_next = substream->next; | |
c461482c | 861 | snd_pcm_timer_done(substream); |
1da177e4 LT |
862 | snd_pcm_substream_proc_done(substream); |
863 | kfree(substream); | |
864 | substream = substream_next; | |
865 | } | |
866 | snd_pcm_stream_proc_done(pstr); | |
8eeaa2f9 | 867 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
868 | for (setup = pstr->oss.setup_list; setup; setup = setupn) { |
869 | setupn = setup->next; | |
870 | kfree(setup->task_name); | |
871 | kfree(setup); | |
872 | } | |
873 | #endif | |
ef46c7af TI |
874 | if (pstr->substream_count) |
875 | put_device(&pstr->dev); | |
1da177e4 LT |
876 | } |
877 | ||
877211f5 | 878 | static int snd_pcm_free(struct snd_pcm *pcm) |
1da177e4 | 879 | { |
c461482c TI |
880 | struct snd_pcm_notify *notify; |
881 | ||
7eaa943c TI |
882 | if (!pcm) |
883 | return 0; | |
646e1dd8 TI |
884 | if (!pcm->internal) { |
885 | list_for_each_entry(notify, &snd_pcm_notify_list, list) | |
886 | notify->n_unregister(pcm); | |
c461482c | 887 | } |
1da177e4 LT |
888 | if (pcm->private_free) |
889 | pcm->private_free(pcm); | |
890 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
891 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]); | |
892 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]); | |
893 | kfree(pcm); | |
894 | return 0; | |
895 | } | |
896 | ||
877211f5 | 897 | static int snd_pcm_dev_free(struct snd_device *device) |
1da177e4 | 898 | { |
877211f5 | 899 | struct snd_pcm *pcm = device->device_data; |
1da177e4 LT |
900 | return snd_pcm_free(pcm); |
901 | } | |
902 | ||
3bf75f9b TI |
903 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, |
904 | struct file *file, | |
905 | struct snd_pcm_substream **rsubstream) | |
1da177e4 | 906 | { |
877211f5 TI |
907 | struct snd_pcm_str * pstr; |
908 | struct snd_pcm_substream *substream; | |
909 | struct snd_pcm_runtime *runtime; | |
877211f5 | 910 | struct snd_card *card; |
23c18d4b | 911 | int prefer_subdevice; |
1da177e4 LT |
912 | size_t size; |
913 | ||
7eaa943c TI |
914 | if (snd_BUG_ON(!pcm || !rsubstream)) |
915 | return -ENXIO; | |
ad876c86 TI |
916 | if (snd_BUG_ON(stream != SNDRV_PCM_STREAM_PLAYBACK && |
917 | stream != SNDRV_PCM_STREAM_CAPTURE)) | |
918 | return -EINVAL; | |
1da177e4 | 919 | *rsubstream = NULL; |
1da177e4 | 920 | pstr = &pcm->streams[stream]; |
3bf75f9b | 921 | if (pstr->substream == NULL || pstr->substream_count == 0) |
1da177e4 LT |
922 | return -ENODEV; |
923 | ||
924 | card = pcm->card; | |
23c18d4b | 925 | prefer_subdevice = snd_ctl_get_preferred_subdevice(card, SND_CTL_SUBDEV_PCM); |
1da177e4 | 926 | |
ad876c86 TI |
927 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { |
928 | int opposite = !stream; | |
929 | ||
930 | for (substream = pcm->streams[opposite].substream; substream; | |
931 | substream = substream->next) { | |
932 | if (SUBSTREAM_BUSY(substream)) | |
933 | return -EAGAIN; | |
1da177e4 | 934 | } |
1da177e4 LT |
935 | } |
936 | ||
0df63e44 TI |
937 | if (file->f_flags & O_APPEND) { |
938 | if (prefer_subdevice < 0) { | |
939 | if (pstr->substream_count > 1) | |
940 | return -EINVAL; /* must be unique */ | |
941 | substream = pstr->substream; | |
942 | } else { | |
943 | for (substream = pstr->substream; substream; | |
944 | substream = substream->next) | |
945 | if (substream->number == prefer_subdevice) | |
946 | break; | |
947 | } | |
948 | if (! substream) | |
949 | return -ENODEV; | |
950 | if (! SUBSTREAM_BUSY(substream)) | |
951 | return -EBADFD; | |
952 | substream->ref_count++; | |
953 | *rsubstream = substream; | |
954 | return 0; | |
955 | } | |
956 | ||
ad876c86 TI |
957 | for (substream = pstr->substream; substream; substream = substream->next) { |
958 | if (!SUBSTREAM_BUSY(substream) && | |
959 | (prefer_subdevice == -1 || | |
960 | substream->number == prefer_subdevice)) | |
1da177e4 | 961 | break; |
ad876c86 | 962 | } |
1da177e4 LT |
963 | if (substream == NULL) |
964 | return -EAGAIN; | |
965 | ||
ca2c0966 | 966 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
1da177e4 LT |
967 | if (runtime == NULL) |
968 | return -ENOMEM; | |
969 | ||
877211f5 | 970 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)); |
1da177e4 LT |
971 | runtime->status = snd_malloc_pages(size, GFP_KERNEL); |
972 | if (runtime->status == NULL) { | |
973 | kfree(runtime); | |
974 | return -ENOMEM; | |
975 | } | |
976 | memset((void*)runtime->status, 0, size); | |
977 | ||
877211f5 | 978 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)); |
1da177e4 LT |
979 | runtime->control = snd_malloc_pages(size, GFP_KERNEL); |
980 | if (runtime->control == NULL) { | |
877211f5 TI |
981 | snd_free_pages((void*)runtime->status, |
982 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
1da177e4 LT |
983 | kfree(runtime); |
984 | return -ENOMEM; | |
985 | } | |
986 | memset((void*)runtime->control, 0, size); | |
987 | ||
988 | init_waitqueue_head(&runtime->sleep); | |
c91a988d | 989 | init_waitqueue_head(&runtime->tsleep); |
1da177e4 LT |
990 | |
991 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
992 | ||
993 | substream->runtime = runtime; | |
994 | substream->private_data = pcm->private_data; | |
0df63e44 TI |
995 | substream->ref_count = 1; |
996 | substream->f_flags = file->f_flags; | |
e7373b70 | 997 | substream->pid = get_pid(task_pid(current)); |
1da177e4 LT |
998 | pstr->substream_opened++; |
999 | *rsubstream = substream; | |
1000 | return 0; | |
1001 | } | |
1002 | ||
3bf75f9b | 1003 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream) |
1da177e4 | 1004 | { |
877211f5 | 1005 | struct snd_pcm_runtime *runtime; |
0df63e44 | 1006 | |
7eaa943c TI |
1007 | if (PCM_RUNTIME_CHECK(substream)) |
1008 | return; | |
1da177e4 | 1009 | runtime = substream->runtime; |
1da177e4 LT |
1010 | if (runtime->private_free != NULL) |
1011 | runtime->private_free(runtime); | |
877211f5 TI |
1012 | snd_free_pages((void*)runtime->status, |
1013 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
1014 | snd_free_pages((void*)runtime->control, | |
1015 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))); | |
1da177e4 | 1016 | kfree(runtime->hw_constraints.rules); |
4d96eb25 | 1017 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
51d503de | 1018 | kfree(runtime->hwptr_log); |
4d96eb25 | 1019 | #endif |
1da177e4 LT |
1020 | kfree(runtime); |
1021 | substream->runtime = NULL; | |
e7373b70 CL |
1022 | put_pid(substream->pid); |
1023 | substream->pid = NULL; | |
1da177e4 LT |
1024 | substream->pstr->substream_opened--; |
1025 | } | |
1026 | ||
d80f19fa GKH |
1027 | static ssize_t show_pcm_class(struct device *dev, |
1028 | struct device_attribute *attr, char *buf) | |
9d19f48c | 1029 | { |
60b93030 TI |
1030 | struct snd_pcm_str *pstr = container_of(dev, struct snd_pcm_str, dev); |
1031 | struct snd_pcm *pcm = pstr->pcm; | |
9d19f48c TI |
1032 | const char *str; |
1033 | static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = { | |
1034 | [SNDRV_PCM_CLASS_GENERIC] = "generic", | |
1035 | [SNDRV_PCM_CLASS_MULTI] = "multi", | |
1036 | [SNDRV_PCM_CLASS_MODEM] = "modem", | |
1037 | [SNDRV_PCM_CLASS_DIGITIZER] = "digitizer", | |
1038 | }; | |
1039 | ||
60b93030 | 1040 | if (pcm->dev_class > SNDRV_PCM_CLASS_LAST) |
9d19f48c TI |
1041 | str = "none"; |
1042 | else | |
1043 | str = strs[pcm->dev_class]; | |
1044 | return snprintf(buf, PAGE_SIZE, "%s\n", str); | |
1045 | } | |
1046 | ||
caa751ba TI |
1047 | static DEVICE_ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL); |
1048 | static struct attribute *pcm_dev_attrs[] = { | |
1049 | &dev_attr_pcm_class.attr, | |
1050 | NULL | |
1051 | }; | |
1052 | ||
1053 | static struct attribute_group pcm_dev_attr_group = { | |
1054 | .attrs = pcm_dev_attrs, | |
1055 | }; | |
1056 | ||
1057 | static const struct attribute_group *pcm_dev_attr_groups[] = { | |
1058 | &pcm_dev_attr_group, | |
1059 | NULL | |
1060 | }; | |
9d19f48c | 1061 | |
877211f5 | 1062 | static int snd_pcm_dev_register(struct snd_device *device) |
1da177e4 | 1063 | { |
f87135f5 | 1064 | int cidx, err; |
877211f5 | 1065 | struct snd_pcm_substream *substream; |
9244b2c3 | 1066 | struct snd_pcm_notify *notify; |
4b3be6af | 1067 | struct snd_pcm *pcm; |
1da177e4 | 1068 | |
4b3be6af | 1069 | if (snd_BUG_ON(!device || !device->device_data)) |
7eaa943c | 1070 | return -ENXIO; |
4b3be6af | 1071 | pcm = device->device_data; |
b95bd3a4 TI |
1072 | if (pcm->internal) |
1073 | return 0; | |
1074 | ||
1a60d4c5 | 1075 | mutex_lock(®ister_mutex); |
f90c06a2 | 1076 | err = snd_pcm_add(pcm); |
b95bd3a4 TI |
1077 | if (err) |
1078 | goto unlock; | |
1da177e4 LT |
1079 | for (cidx = 0; cidx < 2; cidx++) { |
1080 | int devtype = -1; | |
b95bd3a4 | 1081 | if (pcm->streams[cidx].substream == NULL) |
1da177e4 LT |
1082 | continue; |
1083 | switch (cidx) { | |
1084 | case SNDRV_PCM_STREAM_PLAYBACK: | |
1da177e4 LT |
1085 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
1086 | break; | |
1087 | case SNDRV_PCM_STREAM_CAPTURE: | |
1da177e4 LT |
1088 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
1089 | break; | |
1090 | } | |
c78085fc | 1091 | /* register pcm */ |
40a4b263 TI |
1092 | err = snd_register_device(devtype, pcm->card, pcm->device, |
1093 | &snd_pcm_f_ops[cidx], pcm, | |
1094 | &pcm->streams[cidx].dev); | |
c78085fc | 1095 | if (err < 0) { |
b95bd3a4 TI |
1096 | list_del_init(&pcm->list); |
1097 | goto unlock; | |
1da177e4 | 1098 | } |
caa751ba | 1099 | |
1da177e4 LT |
1100 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
1101 | snd_pcm_timer_init(substream); | |
1102 | } | |
9244b2c3 JB |
1103 | |
1104 | list_for_each_entry(notify, &snd_pcm_notify_list, list) | |
1da177e4 | 1105 | notify->n_register(pcm); |
9244b2c3 | 1106 | |
b95bd3a4 | 1107 | unlock: |
1a60d4c5 | 1108 | mutex_unlock(®ister_mutex); |
b95bd3a4 | 1109 | return err; |
1da177e4 LT |
1110 | } |
1111 | ||
877211f5 | 1112 | static int snd_pcm_dev_disconnect(struct snd_device *device) |
1da177e4 | 1113 | { |
877211f5 | 1114 | struct snd_pcm *pcm = device->device_data; |
c461482c | 1115 | struct snd_pcm_notify *notify; |
877211f5 | 1116 | struct snd_pcm_substream *substream; |
40a4b263 | 1117 | int cidx; |
1da177e4 | 1118 | |
1a60d4c5 | 1119 | mutex_lock(®ister_mutex); |
9b0573c0 | 1120 | mutex_lock(&pcm->open_mutex); |
0914f796 | 1121 | wake_up(&pcm->open_wait); |
f87135f5 | 1122 | list_del_init(&pcm->list); |
646e1dd8 | 1123 | for (cidx = 0; cidx < 2; cidx++) { |
9b0573c0 TI |
1124 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) { |
1125 | snd_pcm_stream_lock_irq(substream); | |
0914f796 | 1126 | if (substream->runtime) { |
1da177e4 | 1127 | substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED; |
0914f796 TI |
1128 | wake_up(&substream->runtime->sleep); |
1129 | wake_up(&substream->runtime->tsleep); | |
1130 | } | |
9b0573c0 TI |
1131 | snd_pcm_stream_unlock_irq(substream); |
1132 | } | |
646e1dd8 TI |
1133 | } |
1134 | if (!pcm->internal) { | |
1135 | list_for_each_entry(notify, &snd_pcm_notify_list, list) | |
1136 | notify->n_disconnect(pcm); | |
1da177e4 | 1137 | } |
1da177e4 | 1138 | for (cidx = 0; cidx < 2; cidx++) { |
b2022138 TI |
1139 | if (!pcm->internal) |
1140 | snd_unregister_device(&pcm->streams[cidx].dev); | |
2d3391ec TI |
1141 | if (pcm->streams[cidx].chmap_kctl) { |
1142 | snd_ctl_remove(pcm->card, pcm->streams[cidx].chmap_kctl); | |
1143 | pcm->streams[cidx].chmap_kctl = NULL; | |
1144 | } | |
1da177e4 | 1145 | } |
9b0573c0 | 1146 | mutex_unlock(&pcm->open_mutex); |
1a60d4c5 | 1147 | mutex_unlock(®ister_mutex); |
c461482c | 1148 | return 0; |
1da177e4 LT |
1149 | } |
1150 | ||
30b771cf TI |
1151 | /** |
1152 | * snd_pcm_notify - Add/remove the notify list | |
1153 | * @notify: PCM notify list | |
1154 | * @nfree: 0 = register, 1 = unregister | |
1155 | * | |
1156 | * This adds the given notifier to the global list so that the callback is | |
1157 | * called for each registered PCM devices. This exists only for PCM OSS | |
1158 | * emulation, so far. | |
1159 | */ | |
877211f5 | 1160 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree) |
1da177e4 | 1161 | { |
9244b2c3 | 1162 | struct snd_pcm *pcm; |
1da177e4 | 1163 | |
7eaa943c TI |
1164 | if (snd_BUG_ON(!notify || |
1165 | !notify->n_register || | |
1166 | !notify->n_unregister || | |
1167 | !notify->n_disconnect)) | |
1168 | return -EINVAL; | |
1a60d4c5 | 1169 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1170 | if (nfree) { |
1171 | list_del(¬ify->list); | |
9244b2c3 JB |
1172 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1173 | notify->n_unregister(pcm); | |
1da177e4 LT |
1174 | } else { |
1175 | list_add_tail(¬ify->list, &snd_pcm_notify_list); | |
9244b2c3 JB |
1176 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1177 | notify->n_register(pcm); | |
1da177e4 | 1178 | } |
1a60d4c5 | 1179 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1180 | return 0; |
1181 | } | |
e88e8ae6 TI |
1182 | EXPORT_SYMBOL(snd_pcm_notify); |
1183 | ||
cd6a6503 | 1184 | #ifdef CONFIG_SND_PROC_FS |
1da177e4 LT |
1185 | /* |
1186 | * Info interface | |
1187 | */ | |
1188 | ||
877211f5 TI |
1189 | static void snd_pcm_proc_read(struct snd_info_entry *entry, |
1190 | struct snd_info_buffer *buffer) | |
1da177e4 | 1191 | { |
877211f5 | 1192 | struct snd_pcm *pcm; |
1da177e4 | 1193 | |
1a60d4c5 | 1194 | mutex_lock(®ister_mutex); |
9244b2c3 | 1195 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
f87135f5 CL |
1196 | snd_iprintf(buffer, "%02i-%02i: %s : %s", |
1197 | pcm->card->number, pcm->device, pcm->id, pcm->name); | |
1da177e4 | 1198 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) |
877211f5 TI |
1199 | snd_iprintf(buffer, " : playback %i", |
1200 | pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count); | |
1da177e4 | 1201 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) |
877211f5 TI |
1202 | snd_iprintf(buffer, " : capture %i", |
1203 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); | |
1da177e4 LT |
1204 | snd_iprintf(buffer, "\n"); |
1205 | } | |
1a60d4c5 | 1206 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1207 | } |
1208 | ||
6581f4e7 | 1209 | static struct snd_info_entry *snd_pcm_proc_entry; |
1da177e4 | 1210 | |
e28563cc | 1211 | static void snd_pcm_proc_init(void) |
1da177e4 | 1212 | { |
877211f5 | 1213 | struct snd_info_entry *entry; |
1da177e4 | 1214 | |
1da177e4 | 1215 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) { |
bf850204 | 1216 | snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read); |
1da177e4 LT |
1217 | if (snd_info_register(entry) < 0) { |
1218 | snd_info_free_entry(entry); | |
1219 | entry = NULL; | |
1220 | } | |
1221 | } | |
1222 | snd_pcm_proc_entry = entry; | |
e28563cc TI |
1223 | } |
1224 | ||
1225 | static void snd_pcm_proc_done(void) | |
1226 | { | |
746d4a02 | 1227 | snd_info_free_entry(snd_pcm_proc_entry); |
e28563cc TI |
1228 | } |
1229 | ||
cd6a6503 | 1230 | #else /* !CONFIG_SND_PROC_FS */ |
e28563cc TI |
1231 | #define snd_pcm_proc_init() |
1232 | #define snd_pcm_proc_done() | |
cd6a6503 | 1233 | #endif /* CONFIG_SND_PROC_FS */ |
e28563cc TI |
1234 | |
1235 | ||
1236 | /* | |
1237 | * ENTRY functions | |
1238 | */ | |
1239 | ||
1240 | static int __init alsa_pcm_init(void) | |
1241 | { | |
1242 | snd_ctl_register_ioctl(snd_pcm_control_ioctl); | |
1243 | snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl); | |
1244 | snd_pcm_proc_init(); | |
1da177e4 LT |
1245 | return 0; |
1246 | } | |
1247 | ||
1248 | static void __exit alsa_pcm_exit(void) | |
1249 | { | |
1250 | snd_ctl_unregister_ioctl(snd_pcm_control_ioctl); | |
1251 | snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl); | |
e28563cc | 1252 | snd_pcm_proc_done(); |
1da177e4 LT |
1253 | } |
1254 | ||
1255 | module_init(alsa_pcm_init) | |
1256 | module_exit(alsa_pcm_exit) |