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) { |
a4461f41 RK |
52 | if (pcm->internal) |
53 | continue; | |
f87135f5 CL |
54 | if (pcm->card == card && pcm->device == device) |
55 | return pcm; | |
56 | } | |
57 | return NULL; | |
58 | } | |
59 | ||
f90c06a2 PM |
60 | static int snd_pcm_next(struct snd_card *card, int device) |
61 | { | |
62 | struct snd_pcm *pcm; | |
63 | ||
64 | list_for_each_entry(pcm, &snd_pcm_devices, list) { | |
a4461f41 RK |
65 | if (pcm->internal) |
66 | continue; | |
f90c06a2 PM |
67 | if (pcm->card == card && pcm->device > device) |
68 | return pcm->device; | |
69 | else if (pcm->card->number > card->number) | |
70 | return -1; | |
71 | } | |
72 | return -1; | |
73 | } | |
74 | ||
75 | static int snd_pcm_add(struct snd_pcm *newpcm) | |
76 | { | |
77 | struct snd_pcm *pcm; | |
78 | ||
79 | list_for_each_entry(pcm, &snd_pcm_devices, list) { | |
80 | if (pcm->card == newpcm->card && pcm->device == newpcm->device) | |
81 | return -EBUSY; | |
82 | if (pcm->card->number > newpcm->card->number || | |
83 | (pcm->card == newpcm->card && | |
84 | pcm->device > newpcm->device)) { | |
85 | list_add(&newpcm->list, pcm->list.prev); | |
86 | return 0; | |
87 | } | |
88 | } | |
89 | list_add_tail(&newpcm->list, &snd_pcm_devices); | |
90 | return 0; | |
91 | } | |
92 | ||
877211f5 TI |
93 | static int snd_pcm_control_ioctl(struct snd_card *card, |
94 | struct snd_ctl_file *control, | |
1da177e4 LT |
95 | unsigned int cmd, unsigned long arg) |
96 | { | |
1da177e4 LT |
97 | switch (cmd) { |
98 | case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE: | |
99 | { | |
100 | int device; | |
101 | ||
102 | if (get_user(device, (int __user *)arg)) | |
103 | return -EFAULT; | |
1a60d4c5 | 104 | mutex_lock(®ister_mutex); |
f90c06a2 | 105 | device = snd_pcm_next(card, device); |
1a60d4c5 | 106 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
107 | if (put_user(device, (int __user *)arg)) |
108 | return -EFAULT; | |
109 | return 0; | |
110 | } | |
111 | case SNDRV_CTL_IOCTL_PCM_INFO: | |
112 | { | |
877211f5 | 113 | struct snd_pcm_info __user *info; |
1da177e4 | 114 | unsigned int device, subdevice; |
877211f5 TI |
115 | int stream; |
116 | struct snd_pcm *pcm; | |
117 | struct snd_pcm_str *pstr; | |
118 | struct snd_pcm_substream *substream; | |
f87135f5 CL |
119 | int err; |
120 | ||
877211f5 | 121 | info = (struct snd_pcm_info __user *)arg; |
1da177e4 LT |
122 | if (get_user(device, &info->device)) |
123 | return -EFAULT; | |
1da177e4 LT |
124 | if (get_user(stream, &info->stream)) |
125 | return -EFAULT; | |
126 | if (stream < 0 || stream > 1) | |
127 | return -EINVAL; | |
1da177e4 LT |
128 | if (get_user(subdevice, &info->subdevice)) |
129 | return -EFAULT; | |
1a60d4c5 | 130 | mutex_lock(®ister_mutex); |
f90c06a2 | 131 | pcm = snd_pcm_get(card, device); |
f87135f5 CL |
132 | if (pcm == NULL) { |
133 | err = -ENXIO; | |
134 | goto _error; | |
135 | } | |
136 | pstr = &pcm->streams[stream]; | |
137 | if (pstr->substream_count == 0) { | |
138 | err = -ENOENT; | |
139 | goto _error; | |
140 | } | |
141 | if (subdevice >= pstr->substream_count) { | |
142 | err = -ENXIO; | |
143 | goto _error; | |
144 | } | |
145 | for (substream = pstr->substream; substream; | |
146 | substream = substream->next) | |
1da177e4 LT |
147 | if (substream->number == (int)subdevice) |
148 | break; | |
f87135f5 CL |
149 | if (substream == NULL) { |
150 | err = -ENXIO; | |
151 | goto _error; | |
152 | } | |
153 | err = snd_pcm_info_user(substream, info); | |
154 | _error: | |
1a60d4c5 | 155 | mutex_unlock(®ister_mutex); |
f87135f5 | 156 | return err; |
1da177e4 LT |
157 | } |
158 | case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE: | |
159 | { | |
160 | int val; | |
161 | ||
162 | if (get_user(val, (int __user *)arg)) | |
163 | return -EFAULT; | |
164 | control->prefer_pcm_subdevice = val; | |
165 | return 0; | |
166 | } | |
167 | } | |
168 | return -ENOIOCTLCMD; | |
169 | } | |
21a3479a | 170 | |
1da177e4 | 171 | #define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v |
1da177e4 | 172 | |
1da177e4 LT |
173 | static char *snd_pcm_format_names[] = { |
174 | FORMAT(S8), | |
175 | FORMAT(U8), | |
176 | FORMAT(S16_LE), | |
177 | FORMAT(S16_BE), | |
178 | FORMAT(U16_LE), | |
179 | FORMAT(U16_BE), | |
180 | FORMAT(S24_LE), | |
181 | FORMAT(S24_BE), | |
182 | FORMAT(U24_LE), | |
183 | FORMAT(U24_BE), | |
184 | FORMAT(S32_LE), | |
185 | FORMAT(S32_BE), | |
186 | FORMAT(U32_LE), | |
187 | FORMAT(U32_BE), | |
188 | FORMAT(FLOAT_LE), | |
189 | FORMAT(FLOAT_BE), | |
190 | FORMAT(FLOAT64_LE), | |
191 | FORMAT(FLOAT64_BE), | |
192 | FORMAT(IEC958_SUBFRAME_LE), | |
193 | FORMAT(IEC958_SUBFRAME_BE), | |
194 | FORMAT(MU_LAW), | |
195 | FORMAT(A_LAW), | |
196 | FORMAT(IMA_ADPCM), | |
197 | FORMAT(MPEG), | |
198 | FORMAT(GSM), | |
199 | FORMAT(SPECIAL), | |
200 | FORMAT(S24_3LE), | |
201 | FORMAT(S24_3BE), | |
202 | FORMAT(U24_3LE), | |
203 | FORMAT(U24_3BE), | |
204 | FORMAT(S20_3LE), | |
205 | FORMAT(S20_3BE), | |
206 | FORMAT(U20_3LE), | |
207 | FORMAT(U20_3BE), | |
208 | FORMAT(S18_3LE), | |
209 | FORMAT(S18_3BE), | |
210 | FORMAT(U18_3LE), | |
211 | FORMAT(U18_3BE), | |
7a28826a DC |
212 | FORMAT(G723_24), |
213 | FORMAT(G723_24_1B), | |
214 | FORMAT(G723_40), | |
215 | FORMAT(G723_40_1B), | |
ef7a4f97 DM |
216 | FORMAT(DSD_U8), |
217 | FORMAT(DSD_U16_LE), | |
d4288d3f | 218 | FORMAT(DSD_U32_LE), |
1da177e4 LT |
219 | }; |
220 | ||
6e5265ec | 221 | const char *snd_pcm_format_name(snd_pcm_format_t format) |
e28563cc | 222 | { |
fea952e5 | 223 | if ((__force unsigned int)format >= ARRAY_SIZE(snd_pcm_format_names)) |
7a28826a | 224 | return "Unknown"; |
fea952e5 | 225 | return snd_pcm_format_names[(__force unsigned int)format]; |
e28563cc | 226 | } |
6e5265ec TI |
227 | EXPORT_SYMBOL_GPL(snd_pcm_format_name); |
228 | ||
229 | #ifdef CONFIG_SND_VERBOSE_PROCFS | |
230 | ||
231 | #define STATE(v) [SNDRV_PCM_STATE_##v] = #v | |
232 | #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v | |
233 | #define READY(v) [SNDRV_PCM_READY_##v] = #v | |
234 | #define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v | |
235 | #define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v | |
236 | #define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v | |
237 | #define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v | |
238 | #define START(v) [SNDRV_PCM_START_##v] = #v | |
239 | #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v | |
e28563cc | 240 | |
e28563cc TI |
241 | static char *snd_pcm_stream_names[] = { |
242 | STREAM(PLAYBACK), | |
243 | STREAM(CAPTURE), | |
244 | }; | |
245 | ||
246 | static char *snd_pcm_state_names[] = { | |
247 | STATE(OPEN), | |
248 | STATE(SETUP), | |
249 | STATE(PREPARED), | |
250 | STATE(RUNNING), | |
251 | STATE(XRUN), | |
252 | STATE(DRAINING), | |
253 | STATE(PAUSED), | |
254 | STATE(SUSPENDED), | |
255 | }; | |
256 | ||
257 | static char *snd_pcm_access_names[] = { | |
258 | ACCESS(MMAP_INTERLEAVED), | |
259 | ACCESS(MMAP_NONINTERLEAVED), | |
260 | ACCESS(MMAP_COMPLEX), | |
261 | ACCESS(RW_INTERLEAVED), | |
262 | ACCESS(RW_NONINTERLEAVED), | |
263 | }; | |
264 | ||
1da177e4 LT |
265 | static char *snd_pcm_subformat_names[] = { |
266 | SUBFORMAT(STD), | |
267 | }; | |
268 | ||
269 | static char *snd_pcm_tstamp_mode_names[] = { | |
270 | TSTAMP(NONE), | |
8c121586 | 271 | TSTAMP(ENABLE), |
1da177e4 LT |
272 | }; |
273 | ||
877211f5 | 274 | static const char *snd_pcm_stream_name(int stream) |
1da177e4 | 275 | { |
1da177e4 LT |
276 | return snd_pcm_stream_names[stream]; |
277 | } | |
278 | ||
279 | static const char *snd_pcm_access_name(snd_pcm_access_t access) | |
280 | { | |
fea952e5 | 281 | return snd_pcm_access_names[(__force int)access]; |
1da177e4 LT |
282 | } |
283 | ||
1da177e4 LT |
284 | static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat) |
285 | { | |
fea952e5 | 286 | return snd_pcm_subformat_names[(__force int)subformat]; |
1da177e4 LT |
287 | } |
288 | ||
877211f5 | 289 | static const char *snd_pcm_tstamp_mode_name(int mode) |
1da177e4 | 290 | { |
1da177e4 LT |
291 | return snd_pcm_tstamp_mode_names[mode]; |
292 | } | |
293 | ||
294 | static const char *snd_pcm_state_name(snd_pcm_state_t state) | |
295 | { | |
fea952e5 | 296 | return snd_pcm_state_names[(__force int)state]; |
1da177e4 LT |
297 | } |
298 | ||
8eeaa2f9 | 299 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 | 300 | #include <linux/soundcard.h> |
1a60d4c5 | 301 | |
1da177e4 LT |
302 | static const char *snd_pcm_oss_format_name(int format) |
303 | { | |
304 | switch (format) { | |
305 | case AFMT_MU_LAW: | |
306 | return "MU_LAW"; | |
307 | case AFMT_A_LAW: | |
308 | return "A_LAW"; | |
309 | case AFMT_IMA_ADPCM: | |
310 | return "IMA_ADPCM"; | |
311 | case AFMT_U8: | |
312 | return "U8"; | |
313 | case AFMT_S16_LE: | |
314 | return "S16_LE"; | |
315 | case AFMT_S16_BE: | |
316 | return "S16_BE"; | |
317 | case AFMT_S8: | |
318 | return "S8"; | |
319 | case AFMT_U16_LE: | |
320 | return "U16_LE"; | |
321 | case AFMT_U16_BE: | |
322 | return "U16_BE"; | |
323 | case AFMT_MPEG: | |
324 | return "MPEG"; | |
325 | default: | |
326 | return "unknown"; | |
327 | } | |
328 | } | |
329 | #endif | |
330 | ||
877211f5 TI |
331 | static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, |
332 | struct snd_info_buffer *buffer) | |
1da177e4 | 333 | { |
877211f5 | 334 | struct snd_pcm_info *info; |
1da177e4 LT |
335 | int err; |
336 | ||
7c22f1aa TI |
337 | if (! substream) |
338 | return; | |
1da177e4 LT |
339 | |
340 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
341 | if (! info) { | |
09e56df8 TI |
342 | pcm_dbg(substream->pcm, |
343 | "snd_pcm_proc_info_read: cannot malloc\n"); | |
1da177e4 LT |
344 | return; |
345 | } | |
346 | ||
347 | err = snd_pcm_info(substream, info); | |
348 | if (err < 0) { | |
349 | snd_iprintf(buffer, "error %d\n", err); | |
350 | kfree(info); | |
351 | return; | |
352 | } | |
353 | snd_iprintf(buffer, "card: %d\n", info->card); | |
354 | snd_iprintf(buffer, "device: %d\n", info->device); | |
355 | snd_iprintf(buffer, "subdevice: %d\n", info->subdevice); | |
356 | snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream)); | |
357 | snd_iprintf(buffer, "id: %s\n", info->id); | |
358 | snd_iprintf(buffer, "name: %s\n", info->name); | |
359 | snd_iprintf(buffer, "subname: %s\n", info->subname); | |
360 | snd_iprintf(buffer, "class: %d\n", info->dev_class); | |
361 | snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); | |
362 | snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); | |
363 | snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); | |
364 | kfree(info); | |
365 | } | |
366 | ||
877211f5 TI |
367 | static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry, |
368 | struct snd_info_buffer *buffer) | |
1da177e4 | 369 | { |
877211f5 TI |
370 | snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream, |
371 | buffer); | |
1da177e4 LT |
372 | } |
373 | ||
877211f5 TI |
374 | static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry, |
375 | struct snd_info_buffer *buffer) | |
1da177e4 | 376 | { |
9fe856e4 | 377 | snd_pcm_proc_info_read(entry->private_data, buffer); |
1da177e4 LT |
378 | } |
379 | ||
877211f5 TI |
380 | static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry, |
381 | struct snd_info_buffer *buffer) | |
1da177e4 | 382 | { |
877211f5 | 383 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 TI |
384 | struct snd_pcm_runtime *runtime; |
385 | ||
386 | mutex_lock(&substream->pcm->open_mutex); | |
387 | runtime = substream->runtime; | |
1da177e4 LT |
388 | if (!runtime) { |
389 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 390 | goto unlock; |
1da177e4 | 391 | } |
1da177e4 LT |
392 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
393 | snd_iprintf(buffer, "no setup\n"); | |
901d46d5 | 394 | goto unlock; |
1da177e4 LT |
395 | } |
396 | snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); | |
397 | snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); | |
398 | snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat)); | |
399 | snd_iprintf(buffer, "channels: %u\n", runtime->channels); | |
400 | snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den); | |
401 | snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size); | |
402 | snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size); | |
8eeaa2f9 | 403 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
404 | if (substream->oss.oss) { |
405 | snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format)); | |
406 | snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels); | |
407 | snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate); | |
408 | snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes); | |
409 | snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods); | |
410 | snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); | |
411 | } | |
412 | #endif | |
901d46d5 TI |
413 | unlock: |
414 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 LT |
415 | } |
416 | ||
877211f5 TI |
417 | static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, |
418 | struct snd_info_buffer *buffer) | |
1da177e4 | 419 | { |
877211f5 | 420 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 TI |
421 | struct snd_pcm_runtime *runtime; |
422 | ||
423 | mutex_lock(&substream->pcm->open_mutex); | |
424 | runtime = substream->runtime; | |
1da177e4 LT |
425 | if (!runtime) { |
426 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 427 | goto unlock; |
1da177e4 | 428 | } |
1da177e4 LT |
429 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
430 | snd_iprintf(buffer, "no setup\n"); | |
901d46d5 | 431 | goto unlock; |
1da177e4 LT |
432 | } |
433 | snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); | |
434 | snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); | |
1da177e4 | 435 | snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min); |
1da177e4 LT |
436 | snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold); |
437 | snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold); | |
438 | snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); | |
439 | snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); | |
440 | snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); | |
901d46d5 TI |
441 | unlock: |
442 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 LT |
443 | } |
444 | ||
877211f5 TI |
445 | static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, |
446 | struct snd_info_buffer *buffer) | |
1da177e4 | 447 | { |
877211f5 | 448 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 | 449 | struct snd_pcm_runtime *runtime; |
877211f5 | 450 | struct snd_pcm_status status; |
1da177e4 | 451 | int err; |
901d46d5 TI |
452 | |
453 | mutex_lock(&substream->pcm->open_mutex); | |
454 | runtime = substream->runtime; | |
1da177e4 LT |
455 | if (!runtime) { |
456 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 457 | goto unlock; |
1da177e4 LT |
458 | } |
459 | memset(&status, 0, sizeof(status)); | |
460 | err = snd_pcm_status(substream, &status); | |
461 | if (err < 0) { | |
462 | snd_iprintf(buffer, "error %d\n", err); | |
901d46d5 | 463 | goto unlock; |
1da177e4 LT |
464 | } |
465 | snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); | |
e7373b70 | 466 | snd_iprintf(buffer, "owner_pid : %d\n", pid_vnr(substream->pid)); |
1da177e4 LT |
467 | snd_iprintf(buffer, "trigger_time: %ld.%09ld\n", |
468 | status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec); | |
469 | snd_iprintf(buffer, "tstamp : %ld.%09ld\n", | |
470 | status.tstamp.tv_sec, status.tstamp.tv_nsec); | |
471 | snd_iprintf(buffer, "delay : %ld\n", status.delay); | |
472 | snd_iprintf(buffer, "avail : %ld\n", status.avail); | |
473 | snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max); | |
474 | snd_iprintf(buffer, "-----\n"); | |
475 | snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); | |
476 | snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); | |
901d46d5 TI |
477 | unlock: |
478 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 | 479 | } |
1da177e4 | 480 | |
61fb63c0 | 481 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
877211f5 TI |
482 | static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry, |
483 | struct snd_info_buffer *buffer) | |
1da177e4 | 484 | { |
877211f5 | 485 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
486 | snd_iprintf(buffer, "%d\n", pstr->xrun_debug); |
487 | } | |
488 | ||
877211f5 TI |
489 | static void snd_pcm_xrun_debug_write(struct snd_info_entry *entry, |
490 | struct snd_info_buffer *buffer) | |
1da177e4 | 491 | { |
877211f5 | 492 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
493 | char line[64]; |
494 | if (!snd_info_get_line(buffer, line, sizeof(line))) | |
495 | pstr->xrun_debug = simple_strtoul(line, NULL, 10); | |
496 | } | |
497 | #endif | |
498 | ||
877211f5 | 499 | static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) |
1da177e4 | 500 | { |
877211f5 TI |
501 | struct snd_pcm *pcm = pstr->pcm; |
502 | struct snd_info_entry *entry; | |
1da177e4 LT |
503 | char name[16]; |
504 | ||
505 | sprintf(name, "pcm%i%c", pcm->device, | |
506 | pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); | |
507 | if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL) | |
508 | return -ENOMEM; | |
509 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
510 | if (snd_info_register(entry) < 0) { | |
511 | snd_info_free_entry(entry); | |
512 | return -ENOMEM; | |
513 | } | |
514 | pstr->proc_root = entry; | |
515 | ||
516 | if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) { | |
bf850204 | 517 | snd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read); |
1da177e4 LT |
518 | if (snd_info_register(entry) < 0) { |
519 | snd_info_free_entry(entry); | |
520 | entry = NULL; | |
521 | } | |
522 | } | |
523 | pstr->proc_info_entry = entry; | |
524 | ||
61fb63c0 | 525 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
877211f5 TI |
526 | if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug", |
527 | pstr->proc_root)) != NULL) { | |
1da177e4 | 528 | entry->c.text.read = snd_pcm_xrun_debug_read; |
1da177e4 | 529 | entry->c.text.write = snd_pcm_xrun_debug_write; |
bd7bf042 | 530 | entry->mode |= S_IWUSR; |
1da177e4 LT |
531 | entry->private_data = pstr; |
532 | if (snd_info_register(entry) < 0) { | |
533 | snd_info_free_entry(entry); | |
534 | entry = NULL; | |
535 | } | |
536 | } | |
537 | pstr->proc_xrun_debug_entry = entry; | |
538 | #endif | |
539 | return 0; | |
540 | } | |
541 | ||
877211f5 | 542 | static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) |
1da177e4 | 543 | { |
61fb63c0 | 544 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
746d4a02 TI |
545 | snd_info_free_entry(pstr->proc_xrun_debug_entry); |
546 | pstr->proc_xrun_debug_entry = NULL; | |
1da177e4 | 547 | #endif |
746d4a02 TI |
548 | snd_info_free_entry(pstr->proc_info_entry); |
549 | pstr->proc_info_entry = NULL; | |
550 | snd_info_free_entry(pstr->proc_root); | |
551 | pstr->proc_root = NULL; | |
1da177e4 LT |
552 | return 0; |
553 | } | |
554 | ||
877211f5 | 555 | static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) |
1da177e4 | 556 | { |
877211f5 TI |
557 | struct snd_info_entry *entry; |
558 | struct snd_card *card; | |
1da177e4 LT |
559 | char name[16]; |
560 | ||
561 | card = substream->pcm->card; | |
562 | ||
563 | sprintf(name, "sub%i", substream->number); | |
564 | if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL) | |
565 | return -ENOMEM; | |
566 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
567 | if (snd_info_register(entry) < 0) { | |
568 | snd_info_free_entry(entry); | |
569 | return -ENOMEM; | |
570 | } | |
571 | substream->proc_root = entry; | |
572 | ||
573 | if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) { | |
bf850204 TI |
574 | snd_info_set_text_ops(entry, substream, |
575 | snd_pcm_substream_proc_info_read); | |
1da177e4 LT |
576 | if (snd_info_register(entry) < 0) { |
577 | snd_info_free_entry(entry); | |
578 | entry = NULL; | |
579 | } | |
580 | } | |
581 | substream->proc_info_entry = entry; | |
582 | ||
583 | if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
584 | snd_info_set_text_ops(entry, substream, |
585 | snd_pcm_substream_proc_hw_params_read); | |
1da177e4 LT |
586 | if (snd_info_register(entry) < 0) { |
587 | snd_info_free_entry(entry); | |
588 | entry = NULL; | |
589 | } | |
590 | } | |
591 | substream->proc_hw_params_entry = entry; | |
592 | ||
593 | if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
594 | snd_info_set_text_ops(entry, substream, |
595 | snd_pcm_substream_proc_sw_params_read); | |
1da177e4 LT |
596 | if (snd_info_register(entry) < 0) { |
597 | snd_info_free_entry(entry); | |
598 | entry = NULL; | |
599 | } | |
600 | } | |
601 | substream->proc_sw_params_entry = entry; | |
602 | ||
603 | if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) { | |
bf850204 TI |
604 | snd_info_set_text_ops(entry, substream, |
605 | snd_pcm_substream_proc_status_read); | |
1da177e4 LT |
606 | if (snd_info_register(entry) < 0) { |
607 | snd_info_free_entry(entry); | |
608 | entry = NULL; | |
609 | } | |
610 | } | |
611 | substream->proc_status_entry = entry; | |
612 | ||
613 | return 0; | |
614 | } | |
746d4a02 | 615 | |
877211f5 | 616 | static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) |
1da177e4 | 617 | { |
746d4a02 TI |
618 | snd_info_free_entry(substream->proc_info_entry); |
619 | substream->proc_info_entry = NULL; | |
620 | snd_info_free_entry(substream->proc_hw_params_entry); | |
621 | substream->proc_hw_params_entry = NULL; | |
622 | snd_info_free_entry(substream->proc_sw_params_entry); | |
623 | substream->proc_sw_params_entry = NULL; | |
624 | snd_info_free_entry(substream->proc_status_entry); | |
625 | substream->proc_status_entry = NULL; | |
626 | snd_info_free_entry(substream->proc_root); | |
627 | substream->proc_root = NULL; | |
1da177e4 LT |
628 | return 0; |
629 | } | |
b7d90a35 | 630 | #else /* !CONFIG_SND_VERBOSE_PROCFS */ |
e28563cc TI |
631 | static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; } |
632 | static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; } | |
633 | static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; } | |
634 | static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; } | |
b7d90a35 | 635 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
1da177e4 LT |
636 | |
637 | /** | |
638 | * snd_pcm_new_stream - create a new PCM stream | |
639 | * @pcm: the pcm instance | |
640 | * @stream: the stream direction, SNDRV_PCM_STREAM_XXX | |
641 | * @substream_count: the number of substreams | |
642 | * | |
643 | * Creates a new stream for the pcm. | |
644 | * The corresponding stream on the pcm must have been empty before | |
645 | * calling this, i.e. zero must be given to the argument of | |
646 | * snd_pcm_new(). | |
647 | * | |
eb7c06e8 | 648 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 649 | */ |
877211f5 | 650 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count) |
1da177e4 LT |
651 | { |
652 | int idx, err; | |
877211f5 TI |
653 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
654 | struct snd_pcm_substream *substream, *prev; | |
1da177e4 | 655 | |
8eeaa2f9 | 656 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1a60d4c5 | 657 | mutex_init(&pstr->oss.setup_mutex); |
1da177e4 LT |
658 | #endif |
659 | pstr->stream = stream; | |
660 | pstr->pcm = pcm; | |
661 | pstr->substream_count = substream_count; | |
945e5038 | 662 | if (substream_count > 0 && !pcm->internal) { |
1da177e4 | 663 | err = snd_pcm_stream_proc_init(pstr); |
73e77ba0 | 664 | if (err < 0) { |
09e56df8 | 665 | pcm_err(pcm, "Error in snd_pcm_stream_proc_init\n"); |
1da177e4 | 666 | return err; |
73e77ba0 | 667 | } |
1da177e4 LT |
668 | } |
669 | prev = NULL; | |
670 | for (idx = 0, prev = NULL; idx < substream_count; idx++) { | |
ca2c0966 | 671 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 | 672 | if (substream == NULL) { |
09e56df8 | 673 | pcm_err(pcm, "Cannot allocate PCM substream\n"); |
1da177e4 | 674 | return -ENOMEM; |
73e77ba0 | 675 | } |
1da177e4 LT |
676 | substream->pcm = pcm; |
677 | substream->pstr = pstr; | |
678 | substream->number = idx; | |
679 | substream->stream = stream; | |
680 | sprintf(substream->name, "subdevice #%i", idx); | |
681 | substream->buffer_bytes_max = UINT_MAX; | |
682 | if (prev == NULL) | |
683 | pstr->substream = substream; | |
684 | else | |
685 | prev->next = substream; | |
945e5038 LG |
686 | |
687 | if (!pcm->internal) { | |
688 | err = snd_pcm_substream_proc_init(substream); | |
689 | if (err < 0) { | |
09e56df8 TI |
690 | pcm_err(pcm, |
691 | "Error in snd_pcm_stream_proc_init\n"); | |
945e5038 LG |
692 | if (prev == NULL) |
693 | pstr->substream = NULL; | |
694 | else | |
695 | prev->next = NULL; | |
696 | kfree(substream); | |
697 | return err; | |
698 | } | |
1da177e4 LT |
699 | } |
700 | substream->group = &substream->self_group; | |
701 | spin_lock_init(&substream->self_group.lock); | |
257f8cce | 702 | mutex_init(&substream->self_group.mutex); |
1da177e4 LT |
703 | INIT_LIST_HEAD(&substream->self_group.substreams); |
704 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
9c323fcb | 705 | atomic_set(&substream->mmap_count, 0); |
1da177e4 LT |
706 | prev = substream; |
707 | } | |
708 | return 0; | |
709 | } | |
710 | ||
e88e8ae6 TI |
711 | EXPORT_SYMBOL(snd_pcm_new_stream); |
712 | ||
945e5038 LG |
713 | static int _snd_pcm_new(struct snd_card *card, const char *id, int device, |
714 | int playback_count, int capture_count, bool internal, | |
715 | struct snd_pcm **rpcm) | |
1da177e4 | 716 | { |
877211f5 | 717 | struct snd_pcm *pcm; |
1da177e4 | 718 | int err; |
877211f5 | 719 | static struct snd_device_ops ops = { |
1da177e4 LT |
720 | .dev_free = snd_pcm_dev_free, |
721 | .dev_register = snd_pcm_dev_register, | |
722 | .dev_disconnect = snd_pcm_dev_disconnect, | |
1da177e4 LT |
723 | }; |
724 | ||
7eaa943c TI |
725 | if (snd_BUG_ON(!card)) |
726 | return -ENXIO; | |
727 | if (rpcm) | |
728 | *rpcm = NULL; | |
ca2c0966 | 729 | pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); |
73e77ba0 | 730 | if (pcm == NULL) { |
09e56df8 | 731 | dev_err(card->dev, "Cannot allocate PCM\n"); |
1da177e4 | 732 | return -ENOMEM; |
73e77ba0 | 733 | } |
1da177e4 LT |
734 | pcm->card = card; |
735 | pcm->device = device; | |
945e5038 | 736 | pcm->internal = internal; |
73e77ba0 | 737 | if (id) |
1da177e4 | 738 | strlcpy(pcm->id, id, sizeof(pcm->id)); |
1da177e4 LT |
739 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) { |
740 | snd_pcm_free(pcm); | |
741 | return err; | |
742 | } | |
743 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) { | |
744 | snd_pcm_free(pcm); | |
745 | return err; | |
746 | } | |
1a60d4c5 | 747 | mutex_init(&pcm->open_mutex); |
1da177e4 LT |
748 | init_waitqueue_head(&pcm->open_wait); |
749 | if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) { | |
750 | snd_pcm_free(pcm); | |
751 | return err; | |
752 | } | |
7eaa943c TI |
753 | if (rpcm) |
754 | *rpcm = pcm; | |
1da177e4 LT |
755 | return 0; |
756 | } | |
757 | ||
945e5038 LG |
758 | /** |
759 | * snd_pcm_new - create a new PCM instance | |
760 | * @card: the card instance | |
761 | * @id: the id string | |
762 | * @device: the device index (zero based) | |
763 | * @playback_count: the number of substreams for playback | |
764 | * @capture_count: the number of substreams for capture | |
765 | * @rpcm: the pointer to store the new pcm instance | |
766 | * | |
767 | * Creates a new PCM instance. | |
768 | * | |
769 | * The pcm operators have to be set afterwards to the new instance | |
770 | * via snd_pcm_set_ops(). | |
771 | * | |
eb7c06e8 | 772 | * Return: Zero if successful, or a negative error code on failure. |
945e5038 LG |
773 | */ |
774 | int snd_pcm_new(struct snd_card *card, const char *id, int device, | |
775 | int playback_count, int capture_count, struct snd_pcm **rpcm) | |
776 | { | |
777 | return _snd_pcm_new(card, id, device, playback_count, capture_count, | |
778 | false, rpcm); | |
779 | } | |
e88e8ae6 TI |
780 | EXPORT_SYMBOL(snd_pcm_new); |
781 | ||
945e5038 LG |
782 | /** |
783 | * snd_pcm_new_internal - create a new internal PCM instance | |
784 | * @card: the card instance | |
785 | * @id: the id string | |
786 | * @device: the device index (zero based - shared with normal PCMs) | |
787 | * @playback_count: the number of substreams for playback | |
788 | * @capture_count: the number of substreams for capture | |
789 | * @rpcm: the pointer to store the new pcm instance | |
790 | * | |
791 | * Creates a new internal PCM instance with no userspace device or procfs | |
792 | * entries. This is used by ASoC Back End PCMs in order to create a PCM that | |
793 | * will only be used internally by kernel drivers. i.e. it cannot be opened | |
794 | * by userspace. It provides existing ASoC components drivers with a substream | |
795 | * and access to any private data. | |
796 | * | |
797 | * The pcm operators have to be set afterwards to the new instance | |
798 | * via snd_pcm_set_ops(). | |
799 | * | |
eb7c06e8 | 800 | * Return: Zero if successful, or a negative error code on failure. |
945e5038 LG |
801 | */ |
802 | int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, | |
803 | int playback_count, int capture_count, | |
804 | struct snd_pcm **rpcm) | |
805 | { | |
806 | return _snd_pcm_new(card, id, device, playback_count, capture_count, | |
807 | true, rpcm); | |
808 | } | |
809 | EXPORT_SYMBOL(snd_pcm_new_internal); | |
810 | ||
877211f5 | 811 | static void snd_pcm_free_stream(struct snd_pcm_str * pstr) |
1da177e4 | 812 | { |
877211f5 | 813 | struct snd_pcm_substream *substream, *substream_next; |
8eeaa2f9 | 814 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
877211f5 | 815 | struct snd_pcm_oss_setup *setup, *setupn; |
1da177e4 LT |
816 | #endif |
817 | substream = pstr->substream; | |
818 | while (substream) { | |
819 | substream_next = substream->next; | |
c461482c | 820 | snd_pcm_timer_done(substream); |
1da177e4 LT |
821 | snd_pcm_substream_proc_done(substream); |
822 | kfree(substream); | |
823 | substream = substream_next; | |
824 | } | |
825 | snd_pcm_stream_proc_done(pstr); | |
8eeaa2f9 | 826 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
827 | for (setup = pstr->oss.setup_list; setup; setup = setupn) { |
828 | setupn = setup->next; | |
829 | kfree(setup->task_name); | |
830 | kfree(setup); | |
831 | } | |
832 | #endif | |
833 | } | |
834 | ||
877211f5 | 835 | static int snd_pcm_free(struct snd_pcm *pcm) |
1da177e4 | 836 | { |
c461482c TI |
837 | struct snd_pcm_notify *notify; |
838 | ||
7eaa943c TI |
839 | if (!pcm) |
840 | return 0; | |
c461482c TI |
841 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
842 | notify->n_unregister(pcm); | |
843 | } | |
1da177e4 LT |
844 | if (pcm->private_free) |
845 | pcm->private_free(pcm); | |
846 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
847 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]); | |
848 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]); | |
849 | kfree(pcm); | |
850 | return 0; | |
851 | } | |
852 | ||
877211f5 | 853 | static int snd_pcm_dev_free(struct snd_device *device) |
1da177e4 | 854 | { |
877211f5 | 855 | struct snd_pcm *pcm = device->device_data; |
1da177e4 LT |
856 | return snd_pcm_free(pcm); |
857 | } | |
858 | ||
3bf75f9b TI |
859 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, |
860 | struct file *file, | |
861 | struct snd_pcm_substream **rsubstream) | |
1da177e4 | 862 | { |
877211f5 TI |
863 | struct snd_pcm_str * pstr; |
864 | struct snd_pcm_substream *substream; | |
865 | struct snd_pcm_runtime *runtime; | |
866 | struct snd_ctl_file *kctl; | |
867 | struct snd_card *card; | |
1da177e4 LT |
868 | int prefer_subdevice = -1; |
869 | size_t size; | |
870 | ||
7eaa943c TI |
871 | if (snd_BUG_ON(!pcm || !rsubstream)) |
872 | return -ENXIO; | |
1da177e4 | 873 | *rsubstream = NULL; |
1da177e4 | 874 | pstr = &pcm->streams[stream]; |
3bf75f9b | 875 | if (pstr->substream == NULL || pstr->substream_count == 0) |
1da177e4 LT |
876 | return -ENODEV; |
877 | ||
878 | card = pcm->card; | |
399ccdc1 | 879 | read_lock(&card->ctl_files_rwlock); |
9244b2c3 | 880 | list_for_each_entry(kctl, &card->ctl_files, list) { |
25d27ede | 881 | if (kctl->pid == task_pid(current)) { |
1da177e4 | 882 | prefer_subdevice = kctl->prefer_pcm_subdevice; |
2529bba7 TI |
883 | if (prefer_subdevice != -1) |
884 | break; | |
1da177e4 LT |
885 | } |
886 | } | |
399ccdc1 | 887 | read_unlock(&card->ctl_files_rwlock); |
1da177e4 | 888 | |
1da177e4 LT |
889 | switch (stream) { |
890 | case SNDRV_PCM_STREAM_PLAYBACK: | |
891 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
892 | for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; substream; substream = substream->next) { | |
893 | if (SUBSTREAM_BUSY(substream)) | |
894 | return -EAGAIN; | |
895 | } | |
896 | } | |
897 | break; | |
898 | case SNDRV_PCM_STREAM_CAPTURE: | |
899 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
900 | for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next) { | |
901 | if (SUBSTREAM_BUSY(substream)) | |
902 | return -EAGAIN; | |
903 | } | |
904 | } | |
905 | break; | |
906 | default: | |
907 | return -EINVAL; | |
908 | } | |
909 | ||
0df63e44 TI |
910 | if (file->f_flags & O_APPEND) { |
911 | if (prefer_subdevice < 0) { | |
912 | if (pstr->substream_count > 1) | |
913 | return -EINVAL; /* must be unique */ | |
914 | substream = pstr->substream; | |
915 | } else { | |
916 | for (substream = pstr->substream; substream; | |
917 | substream = substream->next) | |
918 | if (substream->number == prefer_subdevice) | |
919 | break; | |
920 | } | |
921 | if (! substream) | |
922 | return -ENODEV; | |
923 | if (! SUBSTREAM_BUSY(substream)) | |
924 | return -EBADFD; | |
925 | substream->ref_count++; | |
926 | *rsubstream = substream; | |
927 | return 0; | |
928 | } | |
929 | ||
1da177e4 LT |
930 | if (prefer_subdevice >= 0) { |
931 | for (substream = pstr->substream; substream; substream = substream->next) | |
932 | if (!SUBSTREAM_BUSY(substream) && substream->number == prefer_subdevice) | |
933 | goto __ok; | |
934 | } | |
935 | for (substream = pstr->substream; substream; substream = substream->next) | |
936 | if (!SUBSTREAM_BUSY(substream)) | |
937 | break; | |
938 | __ok: | |
939 | if (substream == NULL) | |
940 | return -EAGAIN; | |
941 | ||
ca2c0966 | 942 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
1da177e4 LT |
943 | if (runtime == NULL) |
944 | return -ENOMEM; | |
945 | ||
877211f5 | 946 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)); |
1da177e4 LT |
947 | runtime->status = snd_malloc_pages(size, GFP_KERNEL); |
948 | if (runtime->status == NULL) { | |
949 | kfree(runtime); | |
950 | return -ENOMEM; | |
951 | } | |
952 | memset((void*)runtime->status, 0, size); | |
953 | ||
877211f5 | 954 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)); |
1da177e4 LT |
955 | runtime->control = snd_malloc_pages(size, GFP_KERNEL); |
956 | if (runtime->control == NULL) { | |
877211f5 TI |
957 | snd_free_pages((void*)runtime->status, |
958 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
1da177e4 LT |
959 | kfree(runtime); |
960 | return -ENOMEM; | |
961 | } | |
962 | memset((void*)runtime->control, 0, size); | |
963 | ||
964 | init_waitqueue_head(&runtime->sleep); | |
c91a988d | 965 | init_waitqueue_head(&runtime->tsleep); |
1da177e4 LT |
966 | |
967 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
968 | ||
969 | substream->runtime = runtime; | |
970 | substream->private_data = pcm->private_data; | |
0df63e44 TI |
971 | substream->ref_count = 1; |
972 | substream->f_flags = file->f_flags; | |
e7373b70 | 973 | substream->pid = get_pid(task_pid(current)); |
1da177e4 LT |
974 | pstr->substream_opened++; |
975 | *rsubstream = substream; | |
976 | return 0; | |
977 | } | |
978 | ||
3bf75f9b | 979 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream) |
1da177e4 | 980 | { |
877211f5 | 981 | struct snd_pcm_runtime *runtime; |
0df63e44 | 982 | |
7eaa943c TI |
983 | if (PCM_RUNTIME_CHECK(substream)) |
984 | return; | |
1da177e4 | 985 | runtime = substream->runtime; |
1da177e4 LT |
986 | if (runtime->private_free != NULL) |
987 | runtime->private_free(runtime); | |
877211f5 TI |
988 | snd_free_pages((void*)runtime->status, |
989 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
990 | snd_free_pages((void*)runtime->control, | |
991 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))); | |
1da177e4 | 992 | kfree(runtime->hw_constraints.rules); |
4d96eb25 | 993 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
51d503de | 994 | kfree(runtime->hwptr_log); |
4d96eb25 | 995 | #endif |
1da177e4 LT |
996 | kfree(runtime); |
997 | substream->runtime = NULL; | |
e7373b70 CL |
998 | put_pid(substream->pid); |
999 | substream->pid = NULL; | |
1da177e4 LT |
1000 | substream->pstr->substream_opened--; |
1001 | } | |
1002 | ||
d80f19fa GKH |
1003 | static ssize_t show_pcm_class(struct device *dev, |
1004 | struct device_attribute *attr, char *buf) | |
9d19f48c TI |
1005 | { |
1006 | struct snd_pcm *pcm; | |
1007 | const char *str; | |
1008 | static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = { | |
1009 | [SNDRV_PCM_CLASS_GENERIC] = "generic", | |
1010 | [SNDRV_PCM_CLASS_MULTI] = "multi", | |
1011 | [SNDRV_PCM_CLASS_MODEM] = "modem", | |
1012 | [SNDRV_PCM_CLASS_DIGITIZER] = "digitizer", | |
1013 | }; | |
1014 | ||
d80f19fa | 1015 | if (! (pcm = dev_get_drvdata(dev)) || |
9d19f48c TI |
1016 | pcm->dev_class > SNDRV_PCM_CLASS_LAST) |
1017 | str = "none"; | |
1018 | else | |
1019 | str = strs[pcm->dev_class]; | |
1020 | return snprintf(buf, PAGE_SIZE, "%s\n", str); | |
1021 | } | |
1022 | ||
caa751ba TI |
1023 | static DEVICE_ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL); |
1024 | static struct attribute *pcm_dev_attrs[] = { | |
1025 | &dev_attr_pcm_class.attr, | |
1026 | NULL | |
1027 | }; | |
1028 | ||
1029 | static struct attribute_group pcm_dev_attr_group = { | |
1030 | .attrs = pcm_dev_attrs, | |
1031 | }; | |
1032 | ||
1033 | static const struct attribute_group *pcm_dev_attr_groups[] = { | |
1034 | &pcm_dev_attr_group, | |
1035 | NULL | |
1036 | }; | |
9d19f48c | 1037 | |
877211f5 | 1038 | static int snd_pcm_dev_register(struct snd_device *device) |
1da177e4 | 1039 | { |
f87135f5 | 1040 | int cidx, err; |
877211f5 | 1041 | struct snd_pcm_substream *substream; |
9244b2c3 | 1042 | struct snd_pcm_notify *notify; |
1da177e4 | 1043 | char str[16]; |
4b3be6af | 1044 | struct snd_pcm *pcm; |
c78085fc | 1045 | struct device *dev; |
1da177e4 | 1046 | |
4b3be6af | 1047 | if (snd_BUG_ON(!device || !device->device_data)) |
7eaa943c | 1048 | return -ENXIO; |
4b3be6af | 1049 | pcm = device->device_data; |
1a60d4c5 | 1050 | mutex_lock(®ister_mutex); |
f90c06a2 PM |
1051 | err = snd_pcm_add(pcm); |
1052 | if (err) { | |
1a60d4c5 | 1053 | mutex_unlock(®ister_mutex); |
f90c06a2 | 1054 | return err; |
1da177e4 | 1055 | } |
1da177e4 LT |
1056 | for (cidx = 0; cidx < 2; cidx++) { |
1057 | int devtype = -1; | |
945e5038 | 1058 | if (pcm->streams[cidx].substream == NULL || pcm->internal) |
1da177e4 LT |
1059 | continue; |
1060 | switch (cidx) { | |
1061 | case SNDRV_PCM_STREAM_PLAYBACK: | |
1062 | sprintf(str, "pcmC%iD%ip", pcm->card->number, pcm->device); | |
1da177e4 LT |
1063 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
1064 | break; | |
1065 | case SNDRV_PCM_STREAM_CAPTURE: | |
1066 | sprintf(str, "pcmC%iD%ic", pcm->card->number, pcm->device); | |
1da177e4 LT |
1067 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
1068 | break; | |
1069 | } | |
c78085fc JB |
1070 | /* device pointer to use, pcm->dev takes precedence if |
1071 | * it is assigned, otherwise fall back to card's device | |
1072 | * if possible */ | |
1073 | dev = pcm->dev; | |
1074 | if (!dev) | |
c2902c8a | 1075 | dev = snd_card_get_device_link(pcm->card); |
c78085fc JB |
1076 | /* register pcm */ |
1077 | err = snd_register_device_for_dev(devtype, pcm->card, | |
1078 | pcm->device, | |
1079 | &snd_pcm_f_ops[cidx], | |
1080 | pcm, str, dev); | |
1081 | if (err < 0) { | |
f87135f5 | 1082 | list_del(&pcm->list); |
1a60d4c5 | 1083 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1084 | return err; |
1085 | } | |
caa751ba TI |
1086 | |
1087 | dev = snd_get_device(devtype, pcm->card, pcm->device); | |
1088 | if (dev) { | |
1089 | err = sysfs_create_groups(&dev->kobj, | |
1090 | pcm_dev_attr_groups); | |
1091 | if (err < 0) | |
1092 | dev_warn(dev, | |
1093 | "pcm %d:%d: cannot create sysfs groups\n", | |
1094 | pcm->card->number, pcm->device); | |
1095 | put_device(dev); | |
1096 | } | |
1097 | ||
1da177e4 LT |
1098 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
1099 | snd_pcm_timer_init(substream); | |
1100 | } | |
9244b2c3 JB |
1101 | |
1102 | list_for_each_entry(notify, &snd_pcm_notify_list, list) | |
1da177e4 | 1103 | notify->n_register(pcm); |
9244b2c3 | 1104 | |
1a60d4c5 | 1105 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1106 | return 0; |
1107 | } | |
1108 | ||
877211f5 | 1109 | static int snd_pcm_dev_disconnect(struct snd_device *device) |
1da177e4 | 1110 | { |
877211f5 | 1111 | struct snd_pcm *pcm = device->device_data; |
c461482c | 1112 | struct snd_pcm_notify *notify; |
877211f5 | 1113 | struct snd_pcm_substream *substream; |
c461482c | 1114 | int cidx, devtype; |
1da177e4 | 1115 | |
1a60d4c5 | 1116 | mutex_lock(®ister_mutex); |
c461482c TI |
1117 | if (list_empty(&pcm->list)) |
1118 | goto unlock; | |
1119 | ||
9b0573c0 | 1120 | mutex_lock(&pcm->open_mutex); |
0914f796 | 1121 | wake_up(&pcm->open_wait); |
f87135f5 | 1122 | list_del_init(&pcm->list); |
1da177e4 | 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 | } | |
c461482c | 1133 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
1da177e4 LT |
1134 | notify->n_disconnect(pcm); |
1135 | } | |
1da177e4 LT |
1136 | for (cidx = 0; cidx < 2; cidx++) { |
1137 | devtype = -1; | |
1138 | switch (cidx) { | |
1139 | case SNDRV_PCM_STREAM_PLAYBACK: | |
1140 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; | |
1141 | break; | |
1142 | case SNDRV_PCM_STREAM_CAPTURE: | |
1143 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; | |
1144 | break; | |
1145 | } | |
1146 | snd_unregister_device(devtype, pcm->card, pcm->device); | |
2d3391ec TI |
1147 | if (pcm->streams[cidx].chmap_kctl) { |
1148 | snd_ctl_remove(pcm->card, pcm->streams[cidx].chmap_kctl); | |
1149 | pcm->streams[cidx].chmap_kctl = NULL; | |
1150 | } | |
1da177e4 | 1151 | } |
9b0573c0 | 1152 | mutex_unlock(&pcm->open_mutex); |
c461482c | 1153 | unlock: |
1a60d4c5 | 1154 | mutex_unlock(®ister_mutex); |
c461482c | 1155 | return 0; |
1da177e4 LT |
1156 | } |
1157 | ||
877211f5 | 1158 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree) |
1da177e4 | 1159 | { |
9244b2c3 | 1160 | struct snd_pcm *pcm; |
1da177e4 | 1161 | |
7eaa943c TI |
1162 | if (snd_BUG_ON(!notify || |
1163 | !notify->n_register || | |
1164 | !notify->n_unregister || | |
1165 | !notify->n_disconnect)) | |
1166 | return -EINVAL; | |
1a60d4c5 | 1167 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1168 | if (nfree) { |
1169 | list_del(¬ify->list); | |
9244b2c3 JB |
1170 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1171 | notify->n_unregister(pcm); | |
1da177e4 LT |
1172 | } else { |
1173 | list_add_tail(¬ify->list, &snd_pcm_notify_list); | |
9244b2c3 JB |
1174 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1175 | notify->n_register(pcm); | |
1da177e4 | 1176 | } |
1a60d4c5 | 1177 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1178 | return 0; |
1179 | } | |
1180 | ||
e88e8ae6 TI |
1181 | EXPORT_SYMBOL(snd_pcm_notify); |
1182 | ||
e28563cc | 1183 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1184 | /* |
1185 | * Info interface | |
1186 | */ | |
1187 | ||
877211f5 TI |
1188 | static void snd_pcm_proc_read(struct snd_info_entry *entry, |
1189 | struct snd_info_buffer *buffer) | |
1da177e4 | 1190 | { |
877211f5 | 1191 | struct snd_pcm *pcm; |
1da177e4 | 1192 | |
1a60d4c5 | 1193 | mutex_lock(®ister_mutex); |
9244b2c3 | 1194 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
f87135f5 CL |
1195 | snd_iprintf(buffer, "%02i-%02i: %s : %s", |
1196 | pcm->card->number, pcm->device, pcm->id, pcm->name); | |
1da177e4 | 1197 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) |
877211f5 TI |
1198 | snd_iprintf(buffer, " : playback %i", |
1199 | pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count); | |
1da177e4 | 1200 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) |
877211f5 TI |
1201 | snd_iprintf(buffer, " : capture %i", |
1202 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); | |
1da177e4 LT |
1203 | snd_iprintf(buffer, "\n"); |
1204 | } | |
1a60d4c5 | 1205 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1206 | } |
1207 | ||
6581f4e7 | 1208 | static struct snd_info_entry *snd_pcm_proc_entry; |
1da177e4 | 1209 | |
e28563cc | 1210 | static void snd_pcm_proc_init(void) |
1da177e4 | 1211 | { |
877211f5 | 1212 | struct snd_info_entry *entry; |
1da177e4 | 1213 | |
1da177e4 | 1214 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) { |
bf850204 | 1215 | snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read); |
1da177e4 LT |
1216 | if (snd_info_register(entry) < 0) { |
1217 | snd_info_free_entry(entry); | |
1218 | entry = NULL; | |
1219 | } | |
1220 | } | |
1221 | snd_pcm_proc_entry = entry; | |
e28563cc TI |
1222 | } |
1223 | ||
1224 | static void snd_pcm_proc_done(void) | |
1225 | { | |
746d4a02 | 1226 | snd_info_free_entry(snd_pcm_proc_entry); |
e28563cc TI |
1227 | } |
1228 | ||
1229 | #else /* !CONFIG_PROC_FS */ | |
1230 | #define snd_pcm_proc_init() | |
1231 | #define snd_pcm_proc_done() | |
1232 | #endif /* CONFIG_PROC_FS */ | |
1233 | ||
1234 | ||
1235 | /* | |
1236 | * ENTRY functions | |
1237 | */ | |
1238 | ||
1239 | static int __init alsa_pcm_init(void) | |
1240 | { | |
1241 | snd_ctl_register_ioctl(snd_pcm_control_ioctl); | |
1242 | snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl); | |
1243 | snd_pcm_proc_init(); | |
1da177e4 LT |
1244 | return 0; |
1245 | } | |
1246 | ||
1247 | static void __exit alsa_pcm_exit(void) | |
1248 | { | |
1249 | snd_ctl_unregister_ioctl(snd_pcm_control_ioctl); | |
1250 | snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl); | |
e28563cc | 1251 | snd_pcm_proc_done(); |
1da177e4 LT |
1252 | } |
1253 | ||
1254 | module_init(alsa_pcm_init) | |
1255 | module_exit(alsa_pcm_exit) |