]>
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); | |
346 | if (! info) { | |
09e56df8 TI |
347 | pcm_dbg(substream->pcm, |
348 | "snd_pcm_proc_info_read: cannot malloc\n"); | |
1da177e4 LT |
349 | return; |
350 | } | |
351 | ||
352 | err = snd_pcm_info(substream, info); | |
353 | if (err < 0) { | |
354 | snd_iprintf(buffer, "error %d\n", err); | |
355 | kfree(info); | |
356 | return; | |
357 | } | |
358 | snd_iprintf(buffer, "card: %d\n", info->card); | |
359 | snd_iprintf(buffer, "device: %d\n", info->device); | |
360 | snd_iprintf(buffer, "subdevice: %d\n", info->subdevice); | |
361 | snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream)); | |
362 | snd_iprintf(buffer, "id: %s\n", info->id); | |
363 | snd_iprintf(buffer, "name: %s\n", info->name); | |
364 | snd_iprintf(buffer, "subname: %s\n", info->subname); | |
365 | snd_iprintf(buffer, "class: %d\n", info->dev_class); | |
366 | snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); | |
367 | snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); | |
368 | snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); | |
369 | kfree(info); | |
370 | } | |
371 | ||
877211f5 TI |
372 | static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry, |
373 | struct snd_info_buffer *buffer) | |
1da177e4 | 374 | { |
877211f5 TI |
375 | snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream, |
376 | buffer); | |
1da177e4 LT |
377 | } |
378 | ||
877211f5 TI |
379 | static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry, |
380 | struct snd_info_buffer *buffer) | |
1da177e4 | 381 | { |
9fe856e4 | 382 | snd_pcm_proc_info_read(entry->private_data, buffer); |
1da177e4 LT |
383 | } |
384 | ||
877211f5 TI |
385 | static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry, |
386 | struct snd_info_buffer *buffer) | |
1da177e4 | 387 | { |
877211f5 | 388 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 TI |
389 | struct snd_pcm_runtime *runtime; |
390 | ||
391 | mutex_lock(&substream->pcm->open_mutex); | |
392 | runtime = substream->runtime; | |
1da177e4 LT |
393 | if (!runtime) { |
394 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 395 | goto unlock; |
1da177e4 | 396 | } |
1da177e4 LT |
397 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
398 | snd_iprintf(buffer, "no setup\n"); | |
901d46d5 | 399 | goto unlock; |
1da177e4 LT |
400 | } |
401 | snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); | |
402 | snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); | |
403 | snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat)); | |
404 | snd_iprintf(buffer, "channels: %u\n", runtime->channels); | |
405 | snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den); | |
406 | snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size); | |
407 | snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size); | |
8eeaa2f9 | 408 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
409 | if (substream->oss.oss) { |
410 | snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format)); | |
411 | snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels); | |
412 | snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate); | |
413 | snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes); | |
414 | snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods); | |
415 | snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); | |
416 | } | |
417 | #endif | |
901d46d5 TI |
418 | unlock: |
419 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 LT |
420 | } |
421 | ||
877211f5 TI |
422 | static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, |
423 | struct snd_info_buffer *buffer) | |
1da177e4 | 424 | { |
877211f5 | 425 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 TI |
426 | struct snd_pcm_runtime *runtime; |
427 | ||
428 | mutex_lock(&substream->pcm->open_mutex); | |
429 | runtime = substream->runtime; | |
1da177e4 LT |
430 | if (!runtime) { |
431 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 432 | goto unlock; |
1da177e4 | 433 | } |
1da177e4 LT |
434 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
435 | snd_iprintf(buffer, "no setup\n"); | |
901d46d5 | 436 | goto unlock; |
1da177e4 LT |
437 | } |
438 | snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); | |
439 | snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); | |
1da177e4 | 440 | snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min); |
1da177e4 LT |
441 | snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold); |
442 | snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold); | |
443 | snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); | |
444 | snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); | |
445 | snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); | |
901d46d5 TI |
446 | unlock: |
447 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 LT |
448 | } |
449 | ||
877211f5 TI |
450 | static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, |
451 | struct snd_info_buffer *buffer) | |
1da177e4 | 452 | { |
877211f5 | 453 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 | 454 | struct snd_pcm_runtime *runtime; |
877211f5 | 455 | struct snd_pcm_status status; |
1da177e4 | 456 | int err; |
901d46d5 TI |
457 | |
458 | mutex_lock(&substream->pcm->open_mutex); | |
459 | runtime = substream->runtime; | |
1da177e4 LT |
460 | if (!runtime) { |
461 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 462 | goto unlock; |
1da177e4 LT |
463 | } |
464 | memset(&status, 0, sizeof(status)); | |
465 | err = snd_pcm_status(substream, &status); | |
466 | if (err < 0) { | |
467 | snd_iprintf(buffer, "error %d\n", err); | |
901d46d5 | 468 | goto unlock; |
1da177e4 LT |
469 | } |
470 | snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); | |
e7373b70 | 471 | snd_iprintf(buffer, "owner_pid : %d\n", pid_vnr(substream->pid)); |
1da177e4 LT |
472 | snd_iprintf(buffer, "trigger_time: %ld.%09ld\n", |
473 | status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec); | |
474 | snd_iprintf(buffer, "tstamp : %ld.%09ld\n", | |
475 | status.tstamp.tv_sec, status.tstamp.tv_nsec); | |
476 | snd_iprintf(buffer, "delay : %ld\n", status.delay); | |
477 | snd_iprintf(buffer, "avail : %ld\n", status.avail); | |
478 | snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max); | |
479 | snd_iprintf(buffer, "-----\n"); | |
480 | snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); | |
481 | snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); | |
901d46d5 TI |
482 | unlock: |
483 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 | 484 | } |
1da177e4 | 485 | |
61fb63c0 | 486 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
2b30d411 TI |
487 | static void snd_pcm_xrun_injection_write(struct snd_info_entry *entry, |
488 | struct snd_info_buffer *buffer) | |
489 | { | |
490 | struct snd_pcm_substream *substream = entry->private_data; | |
491 | struct snd_pcm_runtime *runtime; | |
492 | ||
493 | snd_pcm_stream_lock_irq(substream); | |
494 | runtime = substream->runtime; | |
495 | if (runtime && runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
496 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
497 | snd_pcm_stream_unlock_irq(substream); | |
498 | } | |
499 | ||
877211f5 TI |
500 | static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry, |
501 | struct snd_info_buffer *buffer) | |
1da177e4 | 502 | { |
877211f5 | 503 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
504 | snd_iprintf(buffer, "%d\n", pstr->xrun_debug); |
505 | } | |
506 | ||
877211f5 TI |
507 | static void snd_pcm_xrun_debug_write(struct snd_info_entry *entry, |
508 | struct snd_info_buffer *buffer) | |
1da177e4 | 509 | { |
877211f5 | 510 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
511 | char line[64]; |
512 | if (!snd_info_get_line(buffer, line, sizeof(line))) | |
513 | pstr->xrun_debug = simple_strtoul(line, NULL, 10); | |
514 | } | |
515 | #endif | |
516 | ||
877211f5 | 517 | static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) |
1da177e4 | 518 | { |
877211f5 TI |
519 | struct snd_pcm *pcm = pstr->pcm; |
520 | struct snd_info_entry *entry; | |
1da177e4 LT |
521 | char name[16]; |
522 | ||
523 | sprintf(name, "pcm%i%c", pcm->device, | |
524 | pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); | |
525 | if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL) | |
526 | return -ENOMEM; | |
527 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
528 | if (snd_info_register(entry) < 0) { | |
529 | snd_info_free_entry(entry); | |
530 | return -ENOMEM; | |
531 | } | |
532 | pstr->proc_root = entry; | |
533 | ||
534 | if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) { | |
bf850204 | 535 | snd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read); |
1da177e4 LT |
536 | if (snd_info_register(entry) < 0) { |
537 | snd_info_free_entry(entry); | |
538 | entry = NULL; | |
539 | } | |
540 | } | |
541 | pstr->proc_info_entry = entry; | |
542 | ||
61fb63c0 | 543 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
877211f5 TI |
544 | if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug", |
545 | pstr->proc_root)) != NULL) { | |
1da177e4 | 546 | entry->c.text.read = snd_pcm_xrun_debug_read; |
1da177e4 | 547 | entry->c.text.write = snd_pcm_xrun_debug_write; |
bd7bf042 | 548 | entry->mode |= S_IWUSR; |
1da177e4 LT |
549 | entry->private_data = pstr; |
550 | if (snd_info_register(entry) < 0) { | |
551 | snd_info_free_entry(entry); | |
552 | entry = NULL; | |
553 | } | |
554 | } | |
555 | pstr->proc_xrun_debug_entry = entry; | |
556 | #endif | |
557 | return 0; | |
558 | } | |
559 | ||
877211f5 | 560 | static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) |
1da177e4 | 561 | { |
61fb63c0 | 562 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
746d4a02 TI |
563 | snd_info_free_entry(pstr->proc_xrun_debug_entry); |
564 | pstr->proc_xrun_debug_entry = NULL; | |
1da177e4 | 565 | #endif |
746d4a02 TI |
566 | snd_info_free_entry(pstr->proc_info_entry); |
567 | pstr->proc_info_entry = NULL; | |
568 | snd_info_free_entry(pstr->proc_root); | |
569 | pstr->proc_root = NULL; | |
1da177e4 LT |
570 | return 0; |
571 | } | |
572 | ||
877211f5 | 573 | static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) |
1da177e4 | 574 | { |
877211f5 TI |
575 | struct snd_info_entry *entry; |
576 | struct snd_card *card; | |
1da177e4 LT |
577 | char name[16]; |
578 | ||
579 | card = substream->pcm->card; | |
580 | ||
581 | sprintf(name, "sub%i", substream->number); | |
582 | if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL) | |
583 | return -ENOMEM; | |
584 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
585 | if (snd_info_register(entry) < 0) { | |
586 | snd_info_free_entry(entry); | |
587 | return -ENOMEM; | |
588 | } | |
589 | substream->proc_root = entry; | |
590 | ||
591 | if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) { | |
bf850204 TI |
592 | snd_info_set_text_ops(entry, substream, |
593 | snd_pcm_substream_proc_info_read); | |
1da177e4 LT |
594 | if (snd_info_register(entry) < 0) { |
595 | snd_info_free_entry(entry); | |
596 | entry = NULL; | |
597 | } | |
598 | } | |
599 | substream->proc_info_entry = entry; | |
600 | ||
601 | if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
602 | snd_info_set_text_ops(entry, substream, |
603 | snd_pcm_substream_proc_hw_params_read); | |
1da177e4 LT |
604 | if (snd_info_register(entry) < 0) { |
605 | snd_info_free_entry(entry); | |
606 | entry = NULL; | |
607 | } | |
608 | } | |
609 | substream->proc_hw_params_entry = entry; | |
610 | ||
611 | if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
612 | snd_info_set_text_ops(entry, substream, |
613 | snd_pcm_substream_proc_sw_params_read); | |
1da177e4 LT |
614 | if (snd_info_register(entry) < 0) { |
615 | snd_info_free_entry(entry); | |
616 | entry = NULL; | |
617 | } | |
618 | } | |
619 | substream->proc_sw_params_entry = entry; | |
620 | ||
621 | if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) { | |
bf850204 TI |
622 | snd_info_set_text_ops(entry, substream, |
623 | snd_pcm_substream_proc_status_read); | |
1da177e4 LT |
624 | if (snd_info_register(entry) < 0) { |
625 | snd_info_free_entry(entry); | |
626 | entry = NULL; | |
627 | } | |
628 | } | |
629 | substream->proc_status_entry = entry; | |
630 | ||
2b30d411 TI |
631 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
632 | entry = snd_info_create_card_entry(card, "xrun_injection", | |
633 | substream->proc_root); | |
634 | if (entry) { | |
635 | entry->private_data = substream; | |
636 | entry->c.text.read = NULL; | |
637 | entry->c.text.write = snd_pcm_xrun_injection_write; | |
638 | entry->mode = S_IFREG | S_IWUSR; | |
639 | if (snd_info_register(entry) < 0) { | |
640 | snd_info_free_entry(entry); | |
641 | entry = NULL; | |
642 | } | |
643 | } | |
644 | substream->proc_xrun_injection_entry = entry; | |
645 | #endif /* CONFIG_SND_PCM_XRUN_DEBUG */ | |
646 | ||
1da177e4 LT |
647 | return 0; |
648 | } | |
746d4a02 | 649 | |
877211f5 | 650 | static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) |
1da177e4 | 651 | { |
746d4a02 TI |
652 | snd_info_free_entry(substream->proc_info_entry); |
653 | substream->proc_info_entry = NULL; | |
654 | snd_info_free_entry(substream->proc_hw_params_entry); | |
655 | substream->proc_hw_params_entry = NULL; | |
656 | snd_info_free_entry(substream->proc_sw_params_entry); | |
657 | substream->proc_sw_params_entry = NULL; | |
658 | snd_info_free_entry(substream->proc_status_entry); | |
659 | substream->proc_status_entry = NULL; | |
2b30d411 TI |
660 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
661 | snd_info_free_entry(substream->proc_xrun_injection_entry); | |
662 | substream->proc_xrun_injection_entry = NULL; | |
663 | #endif | |
746d4a02 TI |
664 | snd_info_free_entry(substream->proc_root); |
665 | substream->proc_root = NULL; | |
1da177e4 LT |
666 | return 0; |
667 | } | |
b7d90a35 | 668 | #else /* !CONFIG_SND_VERBOSE_PROCFS */ |
e28563cc TI |
669 | static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; } |
670 | static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; } | |
671 | static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; } | |
672 | static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; } | |
b7d90a35 | 673 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
1da177e4 | 674 | |
ef46c7af TI |
675 | static const struct attribute_group *pcm_dev_attr_groups[]; |
676 | ||
1da177e4 LT |
677 | /** |
678 | * snd_pcm_new_stream - create a new PCM stream | |
679 | * @pcm: the pcm instance | |
680 | * @stream: the stream direction, SNDRV_PCM_STREAM_XXX | |
681 | * @substream_count: the number of substreams | |
682 | * | |
683 | * Creates a new stream for the pcm. | |
684 | * The corresponding stream on the pcm must have been empty before | |
685 | * calling this, i.e. zero must be given to the argument of | |
686 | * snd_pcm_new(). | |
687 | * | |
eb7c06e8 | 688 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 689 | */ |
877211f5 | 690 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count) |
1da177e4 LT |
691 | { |
692 | int idx, err; | |
877211f5 TI |
693 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
694 | struct snd_pcm_substream *substream, *prev; | |
1da177e4 | 695 | |
8eeaa2f9 | 696 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1a60d4c5 | 697 | mutex_init(&pstr->oss.setup_mutex); |
1da177e4 LT |
698 | #endif |
699 | pstr->stream = stream; | |
700 | pstr->pcm = pcm; | |
701 | pstr->substream_count = substream_count; | |
ef46c7af TI |
702 | if (!substream_count) |
703 | return 0; | |
704 | ||
705 | snd_device_initialize(&pstr->dev, pcm->card); | |
706 | pstr->dev.groups = pcm_dev_attr_groups; | |
707 | dev_set_name(&pstr->dev, "pcmC%iD%i%c", pcm->card->number, pcm->device, | |
708 | stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); | |
709 | ||
710 | if (!pcm->internal) { | |
1da177e4 | 711 | err = snd_pcm_stream_proc_init(pstr); |
73e77ba0 | 712 | if (err < 0) { |
09e56df8 | 713 | pcm_err(pcm, "Error in snd_pcm_stream_proc_init\n"); |
1da177e4 | 714 | return err; |
73e77ba0 | 715 | } |
1da177e4 LT |
716 | } |
717 | prev = NULL; | |
718 | for (idx = 0, prev = NULL; idx < substream_count; idx++) { | |
ca2c0966 | 719 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 | 720 | if (substream == NULL) { |
09e56df8 | 721 | pcm_err(pcm, "Cannot allocate PCM substream\n"); |
1da177e4 | 722 | return -ENOMEM; |
73e77ba0 | 723 | } |
1da177e4 LT |
724 | substream->pcm = pcm; |
725 | substream->pstr = pstr; | |
726 | substream->number = idx; | |
727 | substream->stream = stream; | |
728 | sprintf(substream->name, "subdevice #%i", idx); | |
729 | substream->buffer_bytes_max = UINT_MAX; | |
730 | if (prev == NULL) | |
731 | pstr->substream = substream; | |
732 | else | |
733 | prev->next = substream; | |
945e5038 LG |
734 | |
735 | if (!pcm->internal) { | |
736 | err = snd_pcm_substream_proc_init(substream); | |
737 | if (err < 0) { | |
09e56df8 TI |
738 | pcm_err(pcm, |
739 | "Error in snd_pcm_stream_proc_init\n"); | |
945e5038 LG |
740 | if (prev == NULL) |
741 | pstr->substream = NULL; | |
742 | else | |
743 | prev->next = NULL; | |
744 | kfree(substream); | |
745 | return err; | |
746 | } | |
1da177e4 LT |
747 | } |
748 | substream->group = &substream->self_group; | |
749 | spin_lock_init(&substream->self_group.lock); | |
257f8cce | 750 | mutex_init(&substream->self_group.mutex); |
1da177e4 LT |
751 | INIT_LIST_HEAD(&substream->self_group.substreams); |
752 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
9c323fcb | 753 | atomic_set(&substream->mmap_count, 0); |
1da177e4 LT |
754 | prev = substream; |
755 | } | |
756 | return 0; | |
757 | } | |
e88e8ae6 TI |
758 | EXPORT_SYMBOL(snd_pcm_new_stream); |
759 | ||
945e5038 LG |
760 | static int _snd_pcm_new(struct snd_card *card, const char *id, int device, |
761 | int playback_count, int capture_count, bool internal, | |
762 | struct snd_pcm **rpcm) | |
1da177e4 | 763 | { |
877211f5 | 764 | struct snd_pcm *pcm; |
1da177e4 | 765 | int err; |
877211f5 | 766 | static struct snd_device_ops ops = { |
1da177e4 LT |
767 | .dev_free = snd_pcm_dev_free, |
768 | .dev_register = snd_pcm_dev_register, | |
769 | .dev_disconnect = snd_pcm_dev_disconnect, | |
1da177e4 LT |
770 | }; |
771 | ||
7eaa943c TI |
772 | if (snd_BUG_ON(!card)) |
773 | return -ENXIO; | |
774 | if (rpcm) | |
775 | *rpcm = NULL; | |
ca2c0966 | 776 | pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); |
73e77ba0 | 777 | if (pcm == NULL) { |
09e56df8 | 778 | dev_err(card->dev, "Cannot allocate PCM\n"); |
1da177e4 | 779 | return -ENOMEM; |
73e77ba0 | 780 | } |
1da177e4 LT |
781 | pcm->card = card; |
782 | pcm->device = device; | |
945e5038 | 783 | pcm->internal = internal; |
b95bd3a4 TI |
784 | mutex_init(&pcm->open_mutex); |
785 | init_waitqueue_head(&pcm->open_wait); | |
786 | INIT_LIST_HEAD(&pcm->list); | |
73e77ba0 | 787 | if (id) |
1da177e4 | 788 | strlcpy(pcm->id, id, sizeof(pcm->id)); |
1da177e4 LT |
789 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) { |
790 | snd_pcm_free(pcm); | |
791 | return err; | |
792 | } | |
793 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) { | |
794 | snd_pcm_free(pcm); | |
795 | return err; | |
796 | } | |
1da177e4 LT |
797 | if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) { |
798 | snd_pcm_free(pcm); | |
799 | return err; | |
800 | } | |
7eaa943c TI |
801 | if (rpcm) |
802 | *rpcm = pcm; | |
1da177e4 LT |
803 | return 0; |
804 | } | |
805 | ||
945e5038 LG |
806 | /** |
807 | * snd_pcm_new - create a new PCM instance | |
808 | * @card: the card instance | |
809 | * @id: the id string | |
810 | * @device: the device index (zero based) | |
811 | * @playback_count: the number of substreams for playback | |
812 | * @capture_count: the number of substreams for capture | |
813 | * @rpcm: the pointer to store the new pcm instance | |
814 | * | |
815 | * Creates a new PCM instance. | |
816 | * | |
817 | * The pcm operators have to be set afterwards to the new instance | |
818 | * via snd_pcm_set_ops(). | |
819 | * | |
eb7c06e8 | 820 | * Return: Zero if successful, or a negative error code on failure. |
945e5038 LG |
821 | */ |
822 | int snd_pcm_new(struct snd_card *card, const char *id, int device, | |
823 | int playback_count, int capture_count, struct snd_pcm **rpcm) | |
824 | { | |
825 | return _snd_pcm_new(card, id, device, playback_count, capture_count, | |
826 | false, rpcm); | |
827 | } | |
e88e8ae6 TI |
828 | EXPORT_SYMBOL(snd_pcm_new); |
829 | ||
945e5038 LG |
830 | /** |
831 | * snd_pcm_new_internal - create a new internal PCM instance | |
832 | * @card: the card instance | |
833 | * @id: the id string | |
834 | * @device: the device index (zero based - shared with normal PCMs) | |
835 | * @playback_count: the number of substreams for playback | |
836 | * @capture_count: the number of substreams for capture | |
837 | * @rpcm: the pointer to store the new pcm instance | |
838 | * | |
839 | * Creates a new internal PCM instance with no userspace device or procfs | |
840 | * entries. This is used by ASoC Back End PCMs in order to create a PCM that | |
841 | * will only be used internally by kernel drivers. i.e. it cannot be opened | |
842 | * by userspace. It provides existing ASoC components drivers with a substream | |
843 | * and access to any private data. | |
844 | * | |
845 | * The pcm operators have to be set afterwards to the new instance | |
846 | * via snd_pcm_set_ops(). | |
847 | * | |
eb7c06e8 | 848 | * Return: Zero if successful, or a negative error code on failure. |
945e5038 LG |
849 | */ |
850 | int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, | |
851 | int playback_count, int capture_count, | |
852 | struct snd_pcm **rpcm) | |
853 | { | |
854 | return _snd_pcm_new(card, id, device, playback_count, capture_count, | |
855 | true, rpcm); | |
856 | } | |
857 | EXPORT_SYMBOL(snd_pcm_new_internal); | |
858 | ||
877211f5 | 859 | static void snd_pcm_free_stream(struct snd_pcm_str * pstr) |
1da177e4 | 860 | { |
877211f5 | 861 | struct snd_pcm_substream *substream, *substream_next; |
8eeaa2f9 | 862 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
877211f5 | 863 | struct snd_pcm_oss_setup *setup, *setupn; |
1da177e4 LT |
864 | #endif |
865 | substream = pstr->substream; | |
866 | while (substream) { | |
867 | substream_next = substream->next; | |
c461482c | 868 | snd_pcm_timer_done(substream); |
1da177e4 LT |
869 | snd_pcm_substream_proc_done(substream); |
870 | kfree(substream); | |
871 | substream = substream_next; | |
872 | } | |
873 | snd_pcm_stream_proc_done(pstr); | |
8eeaa2f9 | 874 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
875 | for (setup = pstr->oss.setup_list; setup; setup = setupn) { |
876 | setupn = setup->next; | |
877 | kfree(setup->task_name); | |
878 | kfree(setup); | |
879 | } | |
880 | #endif | |
ef46c7af TI |
881 | if (pstr->substream_count) |
882 | put_device(&pstr->dev); | |
1da177e4 LT |
883 | } |
884 | ||
877211f5 | 885 | static int snd_pcm_free(struct snd_pcm *pcm) |
1da177e4 | 886 | { |
c461482c TI |
887 | struct snd_pcm_notify *notify; |
888 | ||
7eaa943c TI |
889 | if (!pcm) |
890 | return 0; | |
646e1dd8 TI |
891 | if (!pcm->internal) { |
892 | list_for_each_entry(notify, &snd_pcm_notify_list, list) | |
893 | notify->n_unregister(pcm); | |
c461482c | 894 | } |
1da177e4 LT |
895 | if (pcm->private_free) |
896 | pcm->private_free(pcm); | |
897 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
898 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]); | |
899 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]); | |
900 | kfree(pcm); | |
901 | return 0; | |
902 | } | |
903 | ||
877211f5 | 904 | static int snd_pcm_dev_free(struct snd_device *device) |
1da177e4 | 905 | { |
877211f5 | 906 | struct snd_pcm *pcm = device->device_data; |
1da177e4 LT |
907 | return snd_pcm_free(pcm); |
908 | } | |
909 | ||
3bf75f9b TI |
910 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, |
911 | struct file *file, | |
912 | struct snd_pcm_substream **rsubstream) | |
1da177e4 | 913 | { |
877211f5 TI |
914 | struct snd_pcm_str * pstr; |
915 | struct snd_pcm_substream *substream; | |
916 | struct snd_pcm_runtime *runtime; | |
877211f5 | 917 | struct snd_card *card; |
23c18d4b | 918 | int prefer_subdevice; |
1da177e4 LT |
919 | size_t size; |
920 | ||
7eaa943c TI |
921 | if (snd_BUG_ON(!pcm || !rsubstream)) |
922 | return -ENXIO; | |
ad876c86 TI |
923 | if (snd_BUG_ON(stream != SNDRV_PCM_STREAM_PLAYBACK && |
924 | stream != SNDRV_PCM_STREAM_CAPTURE)) | |
925 | return -EINVAL; | |
1da177e4 | 926 | *rsubstream = NULL; |
1da177e4 | 927 | pstr = &pcm->streams[stream]; |
3bf75f9b | 928 | if (pstr->substream == NULL || pstr->substream_count == 0) |
1da177e4 LT |
929 | return -ENODEV; |
930 | ||
931 | card = pcm->card; | |
23c18d4b | 932 | prefer_subdevice = snd_ctl_get_preferred_subdevice(card, SND_CTL_SUBDEV_PCM); |
1da177e4 | 933 | |
ad876c86 TI |
934 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { |
935 | int opposite = !stream; | |
936 | ||
937 | for (substream = pcm->streams[opposite].substream; substream; | |
938 | substream = substream->next) { | |
939 | if (SUBSTREAM_BUSY(substream)) | |
940 | return -EAGAIN; | |
1da177e4 | 941 | } |
1da177e4 LT |
942 | } |
943 | ||
0df63e44 TI |
944 | if (file->f_flags & O_APPEND) { |
945 | if (prefer_subdevice < 0) { | |
946 | if (pstr->substream_count > 1) | |
947 | return -EINVAL; /* must be unique */ | |
948 | substream = pstr->substream; | |
949 | } else { | |
950 | for (substream = pstr->substream; substream; | |
951 | substream = substream->next) | |
952 | if (substream->number == prefer_subdevice) | |
953 | break; | |
954 | } | |
955 | if (! substream) | |
956 | return -ENODEV; | |
957 | if (! SUBSTREAM_BUSY(substream)) | |
958 | return -EBADFD; | |
959 | substream->ref_count++; | |
960 | *rsubstream = substream; | |
961 | return 0; | |
962 | } | |
963 | ||
ad876c86 TI |
964 | for (substream = pstr->substream; substream; substream = substream->next) { |
965 | if (!SUBSTREAM_BUSY(substream) && | |
966 | (prefer_subdevice == -1 || | |
967 | substream->number == prefer_subdevice)) | |
1da177e4 | 968 | break; |
ad876c86 | 969 | } |
1da177e4 LT |
970 | if (substream == NULL) |
971 | return -EAGAIN; | |
972 | ||
ca2c0966 | 973 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
1da177e4 LT |
974 | if (runtime == NULL) |
975 | return -ENOMEM; | |
976 | ||
877211f5 | 977 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)); |
1da177e4 LT |
978 | runtime->status = snd_malloc_pages(size, GFP_KERNEL); |
979 | if (runtime->status == NULL) { | |
980 | kfree(runtime); | |
981 | return -ENOMEM; | |
982 | } | |
983 | memset((void*)runtime->status, 0, size); | |
984 | ||
877211f5 | 985 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)); |
1da177e4 LT |
986 | runtime->control = snd_malloc_pages(size, GFP_KERNEL); |
987 | if (runtime->control == NULL) { | |
877211f5 TI |
988 | snd_free_pages((void*)runtime->status, |
989 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
1da177e4 LT |
990 | kfree(runtime); |
991 | return -ENOMEM; | |
992 | } | |
993 | memset((void*)runtime->control, 0, size); | |
994 | ||
995 | init_waitqueue_head(&runtime->sleep); | |
c91a988d | 996 | init_waitqueue_head(&runtime->tsleep); |
1da177e4 LT |
997 | |
998 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
999 | ||
1000 | substream->runtime = runtime; | |
1001 | substream->private_data = pcm->private_data; | |
0df63e44 TI |
1002 | substream->ref_count = 1; |
1003 | substream->f_flags = file->f_flags; | |
e7373b70 | 1004 | substream->pid = get_pid(task_pid(current)); |
1da177e4 LT |
1005 | pstr->substream_opened++; |
1006 | *rsubstream = substream; | |
1007 | return 0; | |
1008 | } | |
1009 | ||
3bf75f9b | 1010 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream) |
1da177e4 | 1011 | { |
877211f5 | 1012 | struct snd_pcm_runtime *runtime; |
0df63e44 | 1013 | |
7eaa943c TI |
1014 | if (PCM_RUNTIME_CHECK(substream)) |
1015 | return; | |
1da177e4 | 1016 | runtime = substream->runtime; |
1da177e4 LT |
1017 | if (runtime->private_free != NULL) |
1018 | runtime->private_free(runtime); | |
877211f5 TI |
1019 | snd_free_pages((void*)runtime->status, |
1020 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
1021 | snd_free_pages((void*)runtime->control, | |
1022 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))); | |
1da177e4 | 1023 | kfree(runtime->hw_constraints.rules); |
4d96eb25 | 1024 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
51d503de | 1025 | kfree(runtime->hwptr_log); |
4d96eb25 | 1026 | #endif |
1da177e4 LT |
1027 | kfree(runtime); |
1028 | substream->runtime = NULL; | |
e7373b70 CL |
1029 | put_pid(substream->pid); |
1030 | substream->pid = NULL; | |
1da177e4 LT |
1031 | substream->pstr->substream_opened--; |
1032 | } | |
1033 | ||
d80f19fa GKH |
1034 | static ssize_t show_pcm_class(struct device *dev, |
1035 | struct device_attribute *attr, char *buf) | |
9d19f48c TI |
1036 | { |
1037 | struct snd_pcm *pcm; | |
1038 | const char *str; | |
1039 | static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = { | |
1040 | [SNDRV_PCM_CLASS_GENERIC] = "generic", | |
1041 | [SNDRV_PCM_CLASS_MULTI] = "multi", | |
1042 | [SNDRV_PCM_CLASS_MODEM] = "modem", | |
1043 | [SNDRV_PCM_CLASS_DIGITIZER] = "digitizer", | |
1044 | }; | |
1045 | ||
d80f19fa | 1046 | if (! (pcm = dev_get_drvdata(dev)) || |
9d19f48c TI |
1047 | pcm->dev_class > SNDRV_PCM_CLASS_LAST) |
1048 | str = "none"; | |
1049 | else | |
1050 | str = strs[pcm->dev_class]; | |
1051 | return snprintf(buf, PAGE_SIZE, "%s\n", str); | |
1052 | } | |
1053 | ||
caa751ba TI |
1054 | static DEVICE_ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL); |
1055 | static struct attribute *pcm_dev_attrs[] = { | |
1056 | &dev_attr_pcm_class.attr, | |
1057 | NULL | |
1058 | }; | |
1059 | ||
1060 | static struct attribute_group pcm_dev_attr_group = { | |
1061 | .attrs = pcm_dev_attrs, | |
1062 | }; | |
1063 | ||
1064 | static const struct attribute_group *pcm_dev_attr_groups[] = { | |
1065 | &pcm_dev_attr_group, | |
1066 | NULL | |
1067 | }; | |
9d19f48c | 1068 | |
877211f5 | 1069 | static int snd_pcm_dev_register(struct snd_device *device) |
1da177e4 | 1070 | { |
f87135f5 | 1071 | int cidx, err; |
877211f5 | 1072 | struct snd_pcm_substream *substream; |
9244b2c3 | 1073 | struct snd_pcm_notify *notify; |
4b3be6af | 1074 | struct snd_pcm *pcm; |
1da177e4 | 1075 | |
4b3be6af | 1076 | if (snd_BUG_ON(!device || !device->device_data)) |
7eaa943c | 1077 | return -ENXIO; |
4b3be6af | 1078 | pcm = device->device_data; |
b95bd3a4 TI |
1079 | if (pcm->internal) |
1080 | return 0; | |
1081 | ||
1a60d4c5 | 1082 | mutex_lock(®ister_mutex); |
f90c06a2 | 1083 | err = snd_pcm_add(pcm); |
b95bd3a4 TI |
1084 | if (err) |
1085 | goto unlock; | |
1da177e4 LT |
1086 | for (cidx = 0; cidx < 2; cidx++) { |
1087 | int devtype = -1; | |
b95bd3a4 | 1088 | if (pcm->streams[cidx].substream == NULL) |
1da177e4 LT |
1089 | continue; |
1090 | switch (cidx) { | |
1091 | case SNDRV_PCM_STREAM_PLAYBACK: | |
1da177e4 LT |
1092 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
1093 | break; | |
1094 | case SNDRV_PCM_STREAM_CAPTURE: | |
1da177e4 LT |
1095 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
1096 | break; | |
1097 | } | |
c78085fc | 1098 | /* register pcm */ |
40a4b263 TI |
1099 | err = snd_register_device(devtype, pcm->card, pcm->device, |
1100 | &snd_pcm_f_ops[cidx], pcm, | |
1101 | &pcm->streams[cidx].dev); | |
c78085fc | 1102 | if (err < 0) { |
b95bd3a4 TI |
1103 | list_del_init(&pcm->list); |
1104 | goto unlock; | |
1da177e4 | 1105 | } |
caa751ba | 1106 | |
1da177e4 LT |
1107 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
1108 | snd_pcm_timer_init(substream); | |
1109 | } | |
9244b2c3 JB |
1110 | |
1111 | list_for_each_entry(notify, &snd_pcm_notify_list, list) | |
1da177e4 | 1112 | notify->n_register(pcm); |
9244b2c3 | 1113 | |
b95bd3a4 | 1114 | unlock: |
1a60d4c5 | 1115 | mutex_unlock(®ister_mutex); |
b95bd3a4 | 1116 | return err; |
1da177e4 LT |
1117 | } |
1118 | ||
877211f5 | 1119 | static int snd_pcm_dev_disconnect(struct snd_device *device) |
1da177e4 | 1120 | { |
877211f5 | 1121 | struct snd_pcm *pcm = device->device_data; |
c461482c | 1122 | struct snd_pcm_notify *notify; |
877211f5 | 1123 | struct snd_pcm_substream *substream; |
40a4b263 | 1124 | int cidx; |
1da177e4 | 1125 | |
1a60d4c5 | 1126 | mutex_lock(®ister_mutex); |
9b0573c0 | 1127 | mutex_lock(&pcm->open_mutex); |
0914f796 | 1128 | wake_up(&pcm->open_wait); |
f87135f5 | 1129 | list_del_init(&pcm->list); |
646e1dd8 | 1130 | for (cidx = 0; cidx < 2; cidx++) { |
9b0573c0 TI |
1131 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) { |
1132 | snd_pcm_stream_lock_irq(substream); | |
0914f796 | 1133 | if (substream->runtime) { |
1da177e4 | 1134 | substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED; |
0914f796 TI |
1135 | wake_up(&substream->runtime->sleep); |
1136 | wake_up(&substream->runtime->tsleep); | |
1137 | } | |
9b0573c0 TI |
1138 | snd_pcm_stream_unlock_irq(substream); |
1139 | } | |
646e1dd8 TI |
1140 | } |
1141 | if (!pcm->internal) { | |
1142 | list_for_each_entry(notify, &snd_pcm_notify_list, list) | |
1143 | notify->n_disconnect(pcm); | |
1da177e4 | 1144 | } |
1da177e4 | 1145 | for (cidx = 0; cidx < 2; cidx++) { |
b2022138 TI |
1146 | if (!pcm->internal) |
1147 | snd_unregister_device(&pcm->streams[cidx].dev); | |
2d3391ec TI |
1148 | if (pcm->streams[cidx].chmap_kctl) { |
1149 | snd_ctl_remove(pcm->card, pcm->streams[cidx].chmap_kctl); | |
1150 | pcm->streams[cidx].chmap_kctl = NULL; | |
1151 | } | |
1da177e4 | 1152 | } |
9b0573c0 | 1153 | mutex_unlock(&pcm->open_mutex); |
1a60d4c5 | 1154 | mutex_unlock(®ister_mutex); |
c461482c | 1155 | return 0; |
1da177e4 LT |
1156 | } |
1157 | ||
30b771cf TI |
1158 | /** |
1159 | * snd_pcm_notify - Add/remove the notify list | |
1160 | * @notify: PCM notify list | |
1161 | * @nfree: 0 = register, 1 = unregister | |
1162 | * | |
1163 | * This adds the given notifier to the global list so that the callback is | |
1164 | * called for each registered PCM devices. This exists only for PCM OSS | |
1165 | * emulation, so far. | |
1166 | */ | |
877211f5 | 1167 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree) |
1da177e4 | 1168 | { |
9244b2c3 | 1169 | struct snd_pcm *pcm; |
1da177e4 | 1170 | |
7eaa943c TI |
1171 | if (snd_BUG_ON(!notify || |
1172 | !notify->n_register || | |
1173 | !notify->n_unregister || | |
1174 | !notify->n_disconnect)) | |
1175 | return -EINVAL; | |
1a60d4c5 | 1176 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1177 | if (nfree) { |
1178 | list_del(¬ify->list); | |
9244b2c3 JB |
1179 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1180 | notify->n_unregister(pcm); | |
1da177e4 LT |
1181 | } else { |
1182 | list_add_tail(¬ify->list, &snd_pcm_notify_list); | |
9244b2c3 JB |
1183 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1184 | notify->n_register(pcm); | |
1da177e4 | 1185 | } |
1a60d4c5 | 1186 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1187 | return 0; |
1188 | } | |
e88e8ae6 TI |
1189 | EXPORT_SYMBOL(snd_pcm_notify); |
1190 | ||
e28563cc | 1191 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1192 | /* |
1193 | * Info interface | |
1194 | */ | |
1195 | ||
877211f5 TI |
1196 | static void snd_pcm_proc_read(struct snd_info_entry *entry, |
1197 | struct snd_info_buffer *buffer) | |
1da177e4 | 1198 | { |
877211f5 | 1199 | struct snd_pcm *pcm; |
1da177e4 | 1200 | |
1a60d4c5 | 1201 | mutex_lock(®ister_mutex); |
9244b2c3 | 1202 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
f87135f5 CL |
1203 | snd_iprintf(buffer, "%02i-%02i: %s : %s", |
1204 | pcm->card->number, pcm->device, pcm->id, pcm->name); | |
1da177e4 | 1205 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) |
877211f5 TI |
1206 | snd_iprintf(buffer, " : playback %i", |
1207 | pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count); | |
1da177e4 | 1208 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) |
877211f5 TI |
1209 | snd_iprintf(buffer, " : capture %i", |
1210 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); | |
1da177e4 LT |
1211 | snd_iprintf(buffer, "\n"); |
1212 | } | |
1a60d4c5 | 1213 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1214 | } |
1215 | ||
6581f4e7 | 1216 | static struct snd_info_entry *snd_pcm_proc_entry; |
1da177e4 | 1217 | |
e28563cc | 1218 | static void snd_pcm_proc_init(void) |
1da177e4 | 1219 | { |
877211f5 | 1220 | struct snd_info_entry *entry; |
1da177e4 | 1221 | |
1da177e4 | 1222 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) { |
bf850204 | 1223 | snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read); |
1da177e4 LT |
1224 | if (snd_info_register(entry) < 0) { |
1225 | snd_info_free_entry(entry); | |
1226 | entry = NULL; | |
1227 | } | |
1228 | } | |
1229 | snd_pcm_proc_entry = entry; | |
e28563cc TI |
1230 | } |
1231 | ||
1232 | static void snd_pcm_proc_done(void) | |
1233 | { | |
746d4a02 | 1234 | snd_info_free_entry(snd_pcm_proc_entry); |
e28563cc TI |
1235 | } |
1236 | ||
1237 | #else /* !CONFIG_PROC_FS */ | |
1238 | #define snd_pcm_proc_init() | |
1239 | #define snd_pcm_proc_done() | |
1240 | #endif /* CONFIG_PROC_FS */ | |
1241 | ||
1242 | ||
1243 | /* | |
1244 | * ENTRY functions | |
1245 | */ | |
1246 | ||
1247 | static int __init alsa_pcm_init(void) | |
1248 | { | |
1249 | snd_ctl_register_ioctl(snd_pcm_control_ioctl); | |
1250 | snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl); | |
1251 | snd_pcm_proc_init(); | |
1da177e4 LT |
1252 | return 0; |
1253 | } | |
1254 | ||
1255 | static void __exit alsa_pcm_exit(void) | |
1256 | { | |
1257 | snd_ctl_unregister_ioctl(snd_pcm_control_ioctl); | |
1258 | snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl); | |
e28563cc | 1259 | snd_pcm_proc_done(); |
1da177e4 LT |
1260 | } |
1261 | ||
1262 | module_init(alsa_pcm_init) | |
1263 | module_exit(alsa_pcm_exit) |