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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Digital Audio (PCM) abstract layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
1da177e4 LT |
22 | #include <linux/init.h> |
23 | #include <linux/slab.h> | |
da155d5b | 24 | #include <linux/module.h> |
1da177e4 | 25 | #include <linux/time.h> |
1a60d4c5 | 26 | #include <linux/mutex.h> |
51990e82 | 27 | #include <linux/device.h> |
1da177e4 LT |
28 | #include <sound/core.h> |
29 | #include <sound/minors.h> | |
30 | #include <sound/pcm.h> | |
31 | #include <sound/control.h> | |
32 | #include <sound/info.h> | |
33 | ||
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), |
d42472ec JL |
219 | FORMAT(DSD_U16_BE), |
220 | FORMAT(DSD_U32_BE), | |
1da177e4 LT |
221 | }; |
222 | ||
30b771cf TI |
223 | /** |
224 | * snd_pcm_format_name - Return a name string for the given PCM format | |
225 | * @format: PCM format | |
226 | */ | |
6e5265ec | 227 | const char *snd_pcm_format_name(snd_pcm_format_t format) |
e28563cc | 228 | { |
fea952e5 | 229 | if ((__force unsigned int)format >= ARRAY_SIZE(snd_pcm_format_names)) |
7a28826a | 230 | return "Unknown"; |
fea952e5 | 231 | return snd_pcm_format_names[(__force unsigned int)format]; |
e28563cc | 232 | } |
6e5265ec TI |
233 | EXPORT_SYMBOL_GPL(snd_pcm_format_name); |
234 | ||
235 | #ifdef CONFIG_SND_VERBOSE_PROCFS | |
236 | ||
237 | #define STATE(v) [SNDRV_PCM_STATE_##v] = #v | |
238 | #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v | |
239 | #define READY(v) [SNDRV_PCM_READY_##v] = #v | |
240 | #define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v | |
241 | #define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v | |
242 | #define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v | |
243 | #define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v | |
244 | #define START(v) [SNDRV_PCM_START_##v] = #v | |
245 | #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v | |
e28563cc | 246 | |
e28563cc TI |
247 | static char *snd_pcm_stream_names[] = { |
248 | STREAM(PLAYBACK), | |
249 | STREAM(CAPTURE), | |
250 | }; | |
251 | ||
252 | static char *snd_pcm_state_names[] = { | |
253 | STATE(OPEN), | |
254 | STATE(SETUP), | |
255 | STATE(PREPARED), | |
256 | STATE(RUNNING), | |
257 | STATE(XRUN), | |
258 | STATE(DRAINING), | |
259 | STATE(PAUSED), | |
260 | STATE(SUSPENDED), | |
261 | }; | |
262 | ||
263 | static char *snd_pcm_access_names[] = { | |
264 | ACCESS(MMAP_INTERLEAVED), | |
265 | ACCESS(MMAP_NONINTERLEAVED), | |
266 | ACCESS(MMAP_COMPLEX), | |
267 | ACCESS(RW_INTERLEAVED), | |
268 | ACCESS(RW_NONINTERLEAVED), | |
269 | }; | |
270 | ||
1da177e4 LT |
271 | static char *snd_pcm_subformat_names[] = { |
272 | SUBFORMAT(STD), | |
273 | }; | |
274 | ||
275 | static char *snd_pcm_tstamp_mode_names[] = { | |
276 | TSTAMP(NONE), | |
8c121586 | 277 | TSTAMP(ENABLE), |
1da177e4 LT |
278 | }; |
279 | ||
877211f5 | 280 | static const char *snd_pcm_stream_name(int stream) |
1da177e4 | 281 | { |
1da177e4 LT |
282 | return snd_pcm_stream_names[stream]; |
283 | } | |
284 | ||
285 | static const char *snd_pcm_access_name(snd_pcm_access_t access) | |
286 | { | |
fea952e5 | 287 | return snd_pcm_access_names[(__force int)access]; |
1da177e4 LT |
288 | } |
289 | ||
1da177e4 LT |
290 | static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat) |
291 | { | |
fea952e5 | 292 | return snd_pcm_subformat_names[(__force int)subformat]; |
1da177e4 LT |
293 | } |
294 | ||
877211f5 | 295 | static const char *snd_pcm_tstamp_mode_name(int mode) |
1da177e4 | 296 | { |
1da177e4 LT |
297 | return snd_pcm_tstamp_mode_names[mode]; |
298 | } | |
299 | ||
300 | static const char *snd_pcm_state_name(snd_pcm_state_t state) | |
301 | { | |
fea952e5 | 302 | return snd_pcm_state_names[(__force int)state]; |
1da177e4 LT |
303 | } |
304 | ||
8eeaa2f9 | 305 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 | 306 | #include <linux/soundcard.h> |
1a60d4c5 | 307 | |
1da177e4 LT |
308 | static const char *snd_pcm_oss_format_name(int format) |
309 | { | |
310 | switch (format) { | |
311 | case AFMT_MU_LAW: | |
312 | return "MU_LAW"; | |
313 | case AFMT_A_LAW: | |
314 | return "A_LAW"; | |
315 | case AFMT_IMA_ADPCM: | |
316 | return "IMA_ADPCM"; | |
317 | case AFMT_U8: | |
318 | return "U8"; | |
319 | case AFMT_S16_LE: | |
320 | return "S16_LE"; | |
321 | case AFMT_S16_BE: | |
322 | return "S16_BE"; | |
323 | case AFMT_S8: | |
324 | return "S8"; | |
325 | case AFMT_U16_LE: | |
326 | return "U16_LE"; | |
327 | case AFMT_U16_BE: | |
328 | return "U16_BE"; | |
329 | case AFMT_MPEG: | |
330 | return "MPEG"; | |
331 | default: | |
332 | return "unknown"; | |
333 | } | |
334 | } | |
335 | #endif | |
336 | ||
877211f5 TI |
337 | static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, |
338 | struct snd_info_buffer *buffer) | |
1da177e4 | 339 | { |
877211f5 | 340 | struct snd_pcm_info *info; |
1da177e4 LT |
341 | int err; |
342 | ||
7c22f1aa TI |
343 | if (! substream) |
344 | return; | |
1da177e4 LT |
345 | |
346 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
347 | if (! info) { | |
09e56df8 TI |
348 | pcm_dbg(substream->pcm, |
349 | "snd_pcm_proc_info_read: cannot malloc\n"); | |
1da177e4 LT |
350 | return; |
351 | } | |
352 | ||
353 | err = snd_pcm_info(substream, info); | |
354 | if (err < 0) { | |
355 | snd_iprintf(buffer, "error %d\n", err); | |
356 | kfree(info); | |
357 | return; | |
358 | } | |
359 | snd_iprintf(buffer, "card: %d\n", info->card); | |
360 | snd_iprintf(buffer, "device: %d\n", info->device); | |
361 | snd_iprintf(buffer, "subdevice: %d\n", info->subdevice); | |
362 | snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream)); | |
363 | snd_iprintf(buffer, "id: %s\n", info->id); | |
364 | snd_iprintf(buffer, "name: %s\n", info->name); | |
365 | snd_iprintf(buffer, "subname: %s\n", info->subname); | |
366 | snd_iprintf(buffer, "class: %d\n", info->dev_class); | |
367 | snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); | |
368 | snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); | |
369 | snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); | |
370 | kfree(info); | |
371 | } | |
372 | ||
877211f5 TI |
373 | static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry, |
374 | struct snd_info_buffer *buffer) | |
1da177e4 | 375 | { |
877211f5 TI |
376 | snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream, |
377 | buffer); | |
1da177e4 LT |
378 | } |
379 | ||
877211f5 TI |
380 | static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry, |
381 | struct snd_info_buffer *buffer) | |
1da177e4 | 382 | { |
9fe856e4 | 383 | snd_pcm_proc_info_read(entry->private_data, buffer); |
1da177e4 LT |
384 | } |
385 | ||
877211f5 TI |
386 | static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry, |
387 | struct snd_info_buffer *buffer) | |
1da177e4 | 388 | { |
877211f5 | 389 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 TI |
390 | struct snd_pcm_runtime *runtime; |
391 | ||
392 | mutex_lock(&substream->pcm->open_mutex); | |
393 | runtime = substream->runtime; | |
1da177e4 LT |
394 | if (!runtime) { |
395 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 396 | goto unlock; |
1da177e4 | 397 | } |
1da177e4 LT |
398 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
399 | snd_iprintf(buffer, "no setup\n"); | |
901d46d5 | 400 | goto unlock; |
1da177e4 LT |
401 | } |
402 | snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); | |
403 | snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); | |
404 | snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat)); | |
405 | snd_iprintf(buffer, "channels: %u\n", runtime->channels); | |
406 | snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den); | |
407 | snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size); | |
408 | snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size); | |
8eeaa2f9 | 409 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
410 | if (substream->oss.oss) { |
411 | snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format)); | |
412 | snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels); | |
413 | snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate); | |
414 | snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes); | |
415 | snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods); | |
416 | snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); | |
417 | } | |
418 | #endif | |
901d46d5 TI |
419 | unlock: |
420 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 LT |
421 | } |
422 | ||
877211f5 TI |
423 | static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, |
424 | struct snd_info_buffer *buffer) | |
1da177e4 | 425 | { |
877211f5 | 426 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 TI |
427 | struct snd_pcm_runtime *runtime; |
428 | ||
429 | mutex_lock(&substream->pcm->open_mutex); | |
430 | runtime = substream->runtime; | |
1da177e4 LT |
431 | if (!runtime) { |
432 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 433 | goto unlock; |
1da177e4 | 434 | } |
1da177e4 LT |
435 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
436 | snd_iprintf(buffer, "no setup\n"); | |
901d46d5 | 437 | goto unlock; |
1da177e4 LT |
438 | } |
439 | snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); | |
440 | snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); | |
1da177e4 | 441 | snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min); |
1da177e4 LT |
442 | snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold); |
443 | snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold); | |
444 | snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); | |
445 | snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); | |
446 | snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); | |
901d46d5 TI |
447 | unlock: |
448 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 LT |
449 | } |
450 | ||
877211f5 TI |
451 | static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, |
452 | struct snd_info_buffer *buffer) | |
1da177e4 | 453 | { |
877211f5 | 454 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 | 455 | struct snd_pcm_runtime *runtime; |
877211f5 | 456 | struct snd_pcm_status status; |
1da177e4 | 457 | int err; |
901d46d5 TI |
458 | |
459 | mutex_lock(&substream->pcm->open_mutex); | |
460 | runtime = substream->runtime; | |
1da177e4 LT |
461 | if (!runtime) { |
462 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 463 | goto unlock; |
1da177e4 LT |
464 | } |
465 | memset(&status, 0, sizeof(status)); | |
466 | err = snd_pcm_status(substream, &status); | |
467 | if (err < 0) { | |
468 | snd_iprintf(buffer, "error %d\n", err); | |
901d46d5 | 469 | goto unlock; |
1da177e4 LT |
470 | } |
471 | snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); | |
e7373b70 | 472 | snd_iprintf(buffer, "owner_pid : %d\n", pid_vnr(substream->pid)); |
1da177e4 LT |
473 | snd_iprintf(buffer, "trigger_time: %ld.%09ld\n", |
474 | status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec); | |
475 | snd_iprintf(buffer, "tstamp : %ld.%09ld\n", | |
476 | status.tstamp.tv_sec, status.tstamp.tv_nsec); | |
477 | snd_iprintf(buffer, "delay : %ld\n", status.delay); | |
478 | snd_iprintf(buffer, "avail : %ld\n", status.avail); | |
479 | snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max); | |
480 | snd_iprintf(buffer, "-----\n"); | |
481 | snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); | |
482 | snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); | |
901d46d5 TI |
483 | unlock: |
484 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 | 485 | } |
1da177e4 | 486 | |
61fb63c0 | 487 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
2b30d411 TI |
488 | static void snd_pcm_xrun_injection_write(struct snd_info_entry *entry, |
489 | struct snd_info_buffer *buffer) | |
490 | { | |
491 | struct snd_pcm_substream *substream = entry->private_data; | |
492 | struct snd_pcm_runtime *runtime; | |
493 | ||
494 | snd_pcm_stream_lock_irq(substream); | |
495 | runtime = substream->runtime; | |
496 | if (runtime && runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
497 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
498 | snd_pcm_stream_unlock_irq(substream); | |
499 | } | |
500 | ||
877211f5 TI |
501 | static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry, |
502 | struct snd_info_buffer *buffer) | |
1da177e4 | 503 | { |
877211f5 | 504 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
505 | snd_iprintf(buffer, "%d\n", pstr->xrun_debug); |
506 | } | |
507 | ||
877211f5 TI |
508 | static void snd_pcm_xrun_debug_write(struct snd_info_entry *entry, |
509 | struct snd_info_buffer *buffer) | |
1da177e4 | 510 | { |
877211f5 | 511 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
512 | char line[64]; |
513 | if (!snd_info_get_line(buffer, line, sizeof(line))) | |
514 | pstr->xrun_debug = simple_strtoul(line, NULL, 10); | |
515 | } | |
516 | #endif | |
517 | ||
877211f5 | 518 | static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) |
1da177e4 | 519 | { |
877211f5 TI |
520 | struct snd_pcm *pcm = pstr->pcm; |
521 | struct snd_info_entry *entry; | |
1da177e4 LT |
522 | char name[16]; |
523 | ||
524 | sprintf(name, "pcm%i%c", pcm->device, | |
525 | pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); | |
526 | if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL) | |
527 | return -ENOMEM; | |
528 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
529 | if (snd_info_register(entry) < 0) { | |
530 | snd_info_free_entry(entry); | |
531 | return -ENOMEM; | |
532 | } | |
533 | pstr->proc_root = entry; | |
534 | ||
535 | if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) { | |
bf850204 | 536 | snd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read); |
1da177e4 LT |
537 | if (snd_info_register(entry) < 0) { |
538 | snd_info_free_entry(entry); | |
539 | entry = NULL; | |
540 | } | |
541 | } | |
542 | pstr->proc_info_entry = entry; | |
543 | ||
61fb63c0 | 544 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
877211f5 TI |
545 | if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug", |
546 | pstr->proc_root)) != NULL) { | |
1da177e4 | 547 | entry->c.text.read = snd_pcm_xrun_debug_read; |
1da177e4 | 548 | entry->c.text.write = snd_pcm_xrun_debug_write; |
bd7bf042 | 549 | entry->mode |= S_IWUSR; |
1da177e4 LT |
550 | entry->private_data = pstr; |
551 | if (snd_info_register(entry) < 0) { | |
552 | snd_info_free_entry(entry); | |
553 | entry = NULL; | |
554 | } | |
555 | } | |
556 | pstr->proc_xrun_debug_entry = entry; | |
557 | #endif | |
558 | return 0; | |
559 | } | |
560 | ||
877211f5 | 561 | static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) |
1da177e4 | 562 | { |
61fb63c0 | 563 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
746d4a02 TI |
564 | snd_info_free_entry(pstr->proc_xrun_debug_entry); |
565 | pstr->proc_xrun_debug_entry = NULL; | |
1da177e4 | 566 | #endif |
746d4a02 TI |
567 | snd_info_free_entry(pstr->proc_info_entry); |
568 | pstr->proc_info_entry = NULL; | |
569 | snd_info_free_entry(pstr->proc_root); | |
570 | pstr->proc_root = NULL; | |
1da177e4 LT |
571 | return 0; |
572 | } | |
573 | ||
877211f5 | 574 | static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) |
1da177e4 | 575 | { |
877211f5 TI |
576 | struct snd_info_entry *entry; |
577 | struct snd_card *card; | |
1da177e4 LT |
578 | char name[16]; |
579 | ||
580 | card = substream->pcm->card; | |
581 | ||
582 | sprintf(name, "sub%i", substream->number); | |
583 | if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL) | |
584 | return -ENOMEM; | |
585 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
586 | if (snd_info_register(entry) < 0) { | |
587 | snd_info_free_entry(entry); | |
588 | return -ENOMEM; | |
589 | } | |
590 | substream->proc_root = entry; | |
591 | ||
592 | if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) { | |
bf850204 TI |
593 | snd_info_set_text_ops(entry, substream, |
594 | snd_pcm_substream_proc_info_read); | |
1da177e4 LT |
595 | if (snd_info_register(entry) < 0) { |
596 | snd_info_free_entry(entry); | |
597 | entry = NULL; | |
598 | } | |
599 | } | |
600 | substream->proc_info_entry = entry; | |
601 | ||
602 | if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
603 | snd_info_set_text_ops(entry, substream, |
604 | snd_pcm_substream_proc_hw_params_read); | |
1da177e4 LT |
605 | if (snd_info_register(entry) < 0) { |
606 | snd_info_free_entry(entry); | |
607 | entry = NULL; | |
608 | } | |
609 | } | |
610 | substream->proc_hw_params_entry = entry; | |
611 | ||
612 | if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
613 | snd_info_set_text_ops(entry, substream, |
614 | snd_pcm_substream_proc_sw_params_read); | |
1da177e4 LT |
615 | if (snd_info_register(entry) < 0) { |
616 | snd_info_free_entry(entry); | |
617 | entry = NULL; | |
618 | } | |
619 | } | |
620 | substream->proc_sw_params_entry = entry; | |
621 | ||
622 | if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) { | |
bf850204 TI |
623 | snd_info_set_text_ops(entry, substream, |
624 | snd_pcm_substream_proc_status_read); | |
1da177e4 LT |
625 | if (snd_info_register(entry) < 0) { |
626 | snd_info_free_entry(entry); | |
627 | entry = NULL; | |
628 | } | |
629 | } | |
630 | substream->proc_status_entry = entry; | |
631 | ||
2b30d411 TI |
632 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
633 | entry = snd_info_create_card_entry(card, "xrun_injection", | |
634 | substream->proc_root); | |
635 | if (entry) { | |
636 | entry->private_data = substream; | |
637 | entry->c.text.read = NULL; | |
638 | entry->c.text.write = snd_pcm_xrun_injection_write; | |
639 | entry->mode = S_IFREG | S_IWUSR; | |
640 | if (snd_info_register(entry) < 0) { | |
641 | snd_info_free_entry(entry); | |
642 | entry = NULL; | |
643 | } | |
644 | } | |
645 | substream->proc_xrun_injection_entry = entry; | |
646 | #endif /* CONFIG_SND_PCM_XRUN_DEBUG */ | |
647 | ||
1da177e4 LT |
648 | return 0; |
649 | } | |
746d4a02 | 650 | |
877211f5 | 651 | static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) |
1da177e4 | 652 | { |
746d4a02 TI |
653 | snd_info_free_entry(substream->proc_info_entry); |
654 | substream->proc_info_entry = NULL; | |
655 | snd_info_free_entry(substream->proc_hw_params_entry); | |
656 | substream->proc_hw_params_entry = NULL; | |
657 | snd_info_free_entry(substream->proc_sw_params_entry); | |
658 | substream->proc_sw_params_entry = NULL; | |
659 | snd_info_free_entry(substream->proc_status_entry); | |
660 | substream->proc_status_entry = NULL; | |
2b30d411 TI |
661 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
662 | snd_info_free_entry(substream->proc_xrun_injection_entry); | |
663 | substream->proc_xrun_injection_entry = NULL; | |
664 | #endif | |
746d4a02 TI |
665 | snd_info_free_entry(substream->proc_root); |
666 | substream->proc_root = NULL; | |
1da177e4 LT |
667 | return 0; |
668 | } | |
b7d90a35 | 669 | #else /* !CONFIG_SND_VERBOSE_PROCFS */ |
e28563cc TI |
670 | static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; } |
671 | static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; } | |
672 | static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; } | |
673 | static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; } | |
b7d90a35 | 674 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
1da177e4 LT |
675 | |
676 | /** | |
677 | * snd_pcm_new_stream - create a new PCM stream | |
678 | * @pcm: the pcm instance | |
679 | * @stream: the stream direction, SNDRV_PCM_STREAM_XXX | |
680 | * @substream_count: the number of substreams | |
681 | * | |
682 | * Creates a new stream for the pcm. | |
683 | * The corresponding stream on the pcm must have been empty before | |
684 | * calling this, i.e. zero must be given to the argument of | |
685 | * snd_pcm_new(). | |
686 | * | |
eb7c06e8 | 687 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 688 | */ |
877211f5 | 689 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count) |
1da177e4 LT |
690 | { |
691 | int idx, err; | |
877211f5 TI |
692 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
693 | struct snd_pcm_substream *substream, *prev; | |
1da177e4 | 694 | |
8eeaa2f9 | 695 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1a60d4c5 | 696 | mutex_init(&pstr->oss.setup_mutex); |
1da177e4 LT |
697 | #endif |
698 | pstr->stream = stream; | |
699 | pstr->pcm = pcm; | |
700 | pstr->substream_count = substream_count; | |
945e5038 | 701 | if (substream_count > 0 && !pcm->internal) { |
1da177e4 | 702 | err = snd_pcm_stream_proc_init(pstr); |
73e77ba0 | 703 | if (err < 0) { |
09e56df8 | 704 | pcm_err(pcm, "Error in snd_pcm_stream_proc_init\n"); |
1da177e4 | 705 | return err; |
73e77ba0 | 706 | } |
1da177e4 LT |
707 | } |
708 | prev = NULL; | |
709 | for (idx = 0, prev = NULL; idx < substream_count; idx++) { | |
ca2c0966 | 710 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 | 711 | if (substream == NULL) { |
09e56df8 | 712 | pcm_err(pcm, "Cannot allocate PCM substream\n"); |
1da177e4 | 713 | return -ENOMEM; |
73e77ba0 | 714 | } |
1da177e4 LT |
715 | substream->pcm = pcm; |
716 | substream->pstr = pstr; | |
717 | substream->number = idx; | |
718 | substream->stream = stream; | |
719 | sprintf(substream->name, "subdevice #%i", idx); | |
720 | substream->buffer_bytes_max = UINT_MAX; | |
721 | if (prev == NULL) | |
722 | pstr->substream = substream; | |
723 | else | |
724 | prev->next = substream; | |
945e5038 LG |
725 | |
726 | if (!pcm->internal) { | |
727 | err = snd_pcm_substream_proc_init(substream); | |
728 | if (err < 0) { | |
09e56df8 TI |
729 | pcm_err(pcm, |
730 | "Error in snd_pcm_stream_proc_init\n"); | |
945e5038 LG |
731 | if (prev == NULL) |
732 | pstr->substream = NULL; | |
733 | else | |
734 | prev->next = NULL; | |
735 | kfree(substream); | |
736 | return err; | |
737 | } | |
1da177e4 LT |
738 | } |
739 | substream->group = &substream->self_group; | |
740 | spin_lock_init(&substream->self_group.lock); | |
257f8cce | 741 | mutex_init(&substream->self_group.mutex); |
1da177e4 LT |
742 | INIT_LIST_HEAD(&substream->self_group.substreams); |
743 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
9c323fcb | 744 | atomic_set(&substream->mmap_count, 0); |
1da177e4 LT |
745 | prev = substream; |
746 | } | |
747 | return 0; | |
748 | } | |
e88e8ae6 TI |
749 | EXPORT_SYMBOL(snd_pcm_new_stream); |
750 | ||
945e5038 LG |
751 | static int _snd_pcm_new(struct snd_card *card, const char *id, int device, |
752 | int playback_count, int capture_count, bool internal, | |
753 | struct snd_pcm **rpcm) | |
1da177e4 | 754 | { |
877211f5 | 755 | struct snd_pcm *pcm; |
1da177e4 | 756 | int err; |
877211f5 | 757 | static struct snd_device_ops ops = { |
1da177e4 LT |
758 | .dev_free = snd_pcm_dev_free, |
759 | .dev_register = snd_pcm_dev_register, | |
760 | .dev_disconnect = snd_pcm_dev_disconnect, | |
1da177e4 LT |
761 | }; |
762 | ||
7eaa943c TI |
763 | if (snd_BUG_ON(!card)) |
764 | return -ENXIO; | |
765 | if (rpcm) | |
766 | *rpcm = NULL; | |
ca2c0966 | 767 | pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); |
73e77ba0 | 768 | if (pcm == NULL) { |
09e56df8 | 769 | dev_err(card->dev, "Cannot allocate PCM\n"); |
1da177e4 | 770 | return -ENOMEM; |
73e77ba0 | 771 | } |
1da177e4 LT |
772 | pcm->card = card; |
773 | pcm->device = device; | |
945e5038 | 774 | pcm->internal = internal; |
73e77ba0 | 775 | if (id) |
1da177e4 | 776 | strlcpy(pcm->id, id, sizeof(pcm->id)); |
1da177e4 LT |
777 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) { |
778 | snd_pcm_free(pcm); | |
779 | return err; | |
780 | } | |
781 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) { | |
782 | snd_pcm_free(pcm); | |
783 | return err; | |
784 | } | |
1a60d4c5 | 785 | mutex_init(&pcm->open_mutex); |
1da177e4 LT |
786 | init_waitqueue_head(&pcm->open_wait); |
787 | if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) { | |
788 | snd_pcm_free(pcm); | |
789 | return err; | |
790 | } | |
7eaa943c TI |
791 | if (rpcm) |
792 | *rpcm = pcm; | |
1da177e4 LT |
793 | return 0; |
794 | } | |
795 | ||
945e5038 LG |
796 | /** |
797 | * snd_pcm_new - create a new PCM instance | |
798 | * @card: the card instance | |
799 | * @id: the id string | |
800 | * @device: the device index (zero based) | |
801 | * @playback_count: the number of substreams for playback | |
802 | * @capture_count: the number of substreams for capture | |
803 | * @rpcm: the pointer to store the new pcm instance | |
804 | * | |
805 | * Creates a new PCM instance. | |
806 | * | |
807 | * The pcm operators have to be set afterwards to the new instance | |
808 | * via snd_pcm_set_ops(). | |
809 | * | |
eb7c06e8 | 810 | * Return: Zero if successful, or a negative error code on failure. |
945e5038 LG |
811 | */ |
812 | int snd_pcm_new(struct snd_card *card, const char *id, int device, | |
813 | int playback_count, int capture_count, struct snd_pcm **rpcm) | |
814 | { | |
815 | return _snd_pcm_new(card, id, device, playback_count, capture_count, | |
816 | false, rpcm); | |
817 | } | |
e88e8ae6 TI |
818 | EXPORT_SYMBOL(snd_pcm_new); |
819 | ||
945e5038 LG |
820 | /** |
821 | * snd_pcm_new_internal - create a new internal PCM instance | |
822 | * @card: the card instance | |
823 | * @id: the id string | |
824 | * @device: the device index (zero based - shared with normal PCMs) | |
825 | * @playback_count: the number of substreams for playback | |
826 | * @capture_count: the number of substreams for capture | |
827 | * @rpcm: the pointer to store the new pcm instance | |
828 | * | |
829 | * Creates a new internal PCM instance with no userspace device or procfs | |
830 | * entries. This is used by ASoC Back End PCMs in order to create a PCM that | |
831 | * will only be used internally by kernel drivers. i.e. it cannot be opened | |
832 | * by userspace. It provides existing ASoC components drivers with a substream | |
833 | * and access to any private data. | |
834 | * | |
835 | * The pcm operators have to be set afterwards to the new instance | |
836 | * via snd_pcm_set_ops(). | |
837 | * | |
eb7c06e8 | 838 | * Return: Zero if successful, or a negative error code on failure. |
945e5038 LG |
839 | */ |
840 | int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, | |
841 | int playback_count, int capture_count, | |
842 | struct snd_pcm **rpcm) | |
843 | { | |
844 | return _snd_pcm_new(card, id, device, playback_count, capture_count, | |
845 | true, rpcm); | |
846 | } | |
847 | EXPORT_SYMBOL(snd_pcm_new_internal); | |
848 | ||
877211f5 | 849 | static void snd_pcm_free_stream(struct snd_pcm_str * pstr) |
1da177e4 | 850 | { |
877211f5 | 851 | struct snd_pcm_substream *substream, *substream_next; |
8eeaa2f9 | 852 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
877211f5 | 853 | struct snd_pcm_oss_setup *setup, *setupn; |
1da177e4 LT |
854 | #endif |
855 | substream = pstr->substream; | |
856 | while (substream) { | |
857 | substream_next = substream->next; | |
c461482c | 858 | snd_pcm_timer_done(substream); |
1da177e4 LT |
859 | snd_pcm_substream_proc_done(substream); |
860 | kfree(substream); | |
861 | substream = substream_next; | |
862 | } | |
863 | snd_pcm_stream_proc_done(pstr); | |
8eeaa2f9 | 864 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
865 | for (setup = pstr->oss.setup_list; setup; setup = setupn) { |
866 | setupn = setup->next; | |
867 | kfree(setup->task_name); | |
868 | kfree(setup); | |
869 | } | |
870 | #endif | |
871 | } | |
872 | ||
877211f5 | 873 | static int snd_pcm_free(struct snd_pcm *pcm) |
1da177e4 | 874 | { |
c461482c TI |
875 | struct snd_pcm_notify *notify; |
876 | ||
7eaa943c TI |
877 | if (!pcm) |
878 | return 0; | |
c461482c TI |
879 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
880 | notify->n_unregister(pcm); | |
881 | } | |
1da177e4 LT |
882 | if (pcm->private_free) |
883 | pcm->private_free(pcm); | |
884 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
885 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]); | |
886 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]); | |
887 | kfree(pcm); | |
888 | return 0; | |
889 | } | |
890 | ||
877211f5 | 891 | static int snd_pcm_dev_free(struct snd_device *device) |
1da177e4 | 892 | { |
877211f5 | 893 | struct snd_pcm *pcm = device->device_data; |
1da177e4 LT |
894 | return snd_pcm_free(pcm); |
895 | } | |
896 | ||
3bf75f9b TI |
897 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, |
898 | struct file *file, | |
899 | struct snd_pcm_substream **rsubstream) | |
1da177e4 | 900 | { |
877211f5 TI |
901 | struct snd_pcm_str * pstr; |
902 | struct snd_pcm_substream *substream; | |
903 | struct snd_pcm_runtime *runtime; | |
904 | struct snd_ctl_file *kctl; | |
905 | struct snd_card *card; | |
1da177e4 LT |
906 | int prefer_subdevice = -1; |
907 | size_t size; | |
908 | ||
7eaa943c TI |
909 | if (snd_BUG_ON(!pcm || !rsubstream)) |
910 | return -ENXIO; | |
1da177e4 | 911 | *rsubstream = NULL; |
1da177e4 | 912 | pstr = &pcm->streams[stream]; |
3bf75f9b | 913 | if (pstr->substream == NULL || pstr->substream_count == 0) |
1da177e4 LT |
914 | return -ENODEV; |
915 | ||
916 | card = pcm->card; | |
399ccdc1 | 917 | read_lock(&card->ctl_files_rwlock); |
9244b2c3 | 918 | list_for_each_entry(kctl, &card->ctl_files, list) { |
25d27ede | 919 | if (kctl->pid == task_pid(current)) { |
1da177e4 | 920 | prefer_subdevice = kctl->prefer_pcm_subdevice; |
2529bba7 TI |
921 | if (prefer_subdevice != -1) |
922 | break; | |
1da177e4 LT |
923 | } |
924 | } | |
399ccdc1 | 925 | read_unlock(&card->ctl_files_rwlock); |
1da177e4 | 926 | |
1da177e4 LT |
927 | switch (stream) { |
928 | case SNDRV_PCM_STREAM_PLAYBACK: | |
929 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
930 | for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; substream; substream = substream->next) { | |
931 | if (SUBSTREAM_BUSY(substream)) | |
932 | return -EAGAIN; | |
933 | } | |
934 | } | |
935 | break; | |
936 | case SNDRV_PCM_STREAM_CAPTURE: | |
937 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
938 | for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next) { | |
939 | if (SUBSTREAM_BUSY(substream)) | |
940 | return -EAGAIN; | |
941 | } | |
942 | } | |
943 | break; | |
944 | default: | |
945 | return -EINVAL; | |
946 | } | |
947 | ||
0df63e44 TI |
948 | if (file->f_flags & O_APPEND) { |
949 | if (prefer_subdevice < 0) { | |
950 | if (pstr->substream_count > 1) | |
951 | return -EINVAL; /* must be unique */ | |
952 | substream = pstr->substream; | |
953 | } else { | |
954 | for (substream = pstr->substream; substream; | |
955 | substream = substream->next) | |
956 | if (substream->number == prefer_subdevice) | |
957 | break; | |
958 | } | |
959 | if (! substream) | |
960 | return -ENODEV; | |
961 | if (! SUBSTREAM_BUSY(substream)) | |
962 | return -EBADFD; | |
963 | substream->ref_count++; | |
964 | *rsubstream = substream; | |
965 | return 0; | |
966 | } | |
967 | ||
1da177e4 LT |
968 | if (prefer_subdevice >= 0) { |
969 | for (substream = pstr->substream; substream; substream = substream->next) | |
970 | if (!SUBSTREAM_BUSY(substream) && substream->number == prefer_subdevice) | |
971 | goto __ok; | |
972 | } | |
973 | for (substream = pstr->substream; substream; substream = substream->next) | |
974 | if (!SUBSTREAM_BUSY(substream)) | |
975 | break; | |
976 | __ok: | |
977 | if (substream == NULL) | |
978 | return -EAGAIN; | |
979 | ||
ca2c0966 | 980 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
1da177e4 LT |
981 | if (runtime == NULL) |
982 | return -ENOMEM; | |
983 | ||
877211f5 | 984 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)); |
1da177e4 LT |
985 | runtime->status = snd_malloc_pages(size, GFP_KERNEL); |
986 | if (runtime->status == NULL) { | |
987 | kfree(runtime); | |
988 | return -ENOMEM; | |
989 | } | |
990 | memset((void*)runtime->status, 0, size); | |
991 | ||
877211f5 | 992 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)); |
1da177e4 LT |
993 | runtime->control = snd_malloc_pages(size, GFP_KERNEL); |
994 | if (runtime->control == NULL) { | |
877211f5 TI |
995 | snd_free_pages((void*)runtime->status, |
996 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
1da177e4 LT |
997 | kfree(runtime); |
998 | return -ENOMEM; | |
999 | } | |
1000 | memset((void*)runtime->control, 0, size); | |
1001 | ||
1002 | init_waitqueue_head(&runtime->sleep); | |
c91a988d | 1003 | init_waitqueue_head(&runtime->tsleep); |
1da177e4 LT |
1004 | |
1005 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
1006 | ||
1007 | substream->runtime = runtime; | |
1008 | substream->private_data = pcm->private_data; | |
0df63e44 TI |
1009 | substream->ref_count = 1; |
1010 | substream->f_flags = file->f_flags; | |
e7373b70 | 1011 | substream->pid = get_pid(task_pid(current)); |
1da177e4 LT |
1012 | pstr->substream_opened++; |
1013 | *rsubstream = substream; | |
1014 | return 0; | |
1015 | } | |
1016 | ||
3bf75f9b | 1017 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream) |
1da177e4 | 1018 | { |
877211f5 | 1019 | struct snd_pcm_runtime *runtime; |
0df63e44 | 1020 | |
7eaa943c TI |
1021 | if (PCM_RUNTIME_CHECK(substream)) |
1022 | return; | |
1da177e4 | 1023 | runtime = substream->runtime; |
1da177e4 LT |
1024 | if (runtime->private_free != NULL) |
1025 | runtime->private_free(runtime); | |
877211f5 TI |
1026 | snd_free_pages((void*)runtime->status, |
1027 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
1028 | snd_free_pages((void*)runtime->control, | |
1029 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))); | |
1da177e4 | 1030 | kfree(runtime->hw_constraints.rules); |
4d96eb25 | 1031 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
51d503de | 1032 | kfree(runtime->hwptr_log); |
4d96eb25 | 1033 | #endif |
1da177e4 LT |
1034 | kfree(runtime); |
1035 | substream->runtime = NULL; | |
e7373b70 CL |
1036 | put_pid(substream->pid); |
1037 | substream->pid = NULL; | |
1da177e4 LT |
1038 | substream->pstr->substream_opened--; |
1039 | } | |
1040 | ||
d80f19fa GKH |
1041 | static ssize_t show_pcm_class(struct device *dev, |
1042 | struct device_attribute *attr, char *buf) | |
9d19f48c TI |
1043 | { |
1044 | struct snd_pcm *pcm; | |
1045 | const char *str; | |
1046 | static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = { | |
1047 | [SNDRV_PCM_CLASS_GENERIC] = "generic", | |
1048 | [SNDRV_PCM_CLASS_MULTI] = "multi", | |
1049 | [SNDRV_PCM_CLASS_MODEM] = "modem", | |
1050 | [SNDRV_PCM_CLASS_DIGITIZER] = "digitizer", | |
1051 | }; | |
1052 | ||
d80f19fa | 1053 | if (! (pcm = dev_get_drvdata(dev)) || |
9d19f48c TI |
1054 | pcm->dev_class > SNDRV_PCM_CLASS_LAST) |
1055 | str = "none"; | |
1056 | else | |
1057 | str = strs[pcm->dev_class]; | |
1058 | return snprintf(buf, PAGE_SIZE, "%s\n", str); | |
1059 | } | |
1060 | ||
caa751ba TI |
1061 | static DEVICE_ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL); |
1062 | static struct attribute *pcm_dev_attrs[] = { | |
1063 | &dev_attr_pcm_class.attr, | |
1064 | NULL | |
1065 | }; | |
1066 | ||
1067 | static struct attribute_group pcm_dev_attr_group = { | |
1068 | .attrs = pcm_dev_attrs, | |
1069 | }; | |
1070 | ||
1071 | static const struct attribute_group *pcm_dev_attr_groups[] = { | |
1072 | &pcm_dev_attr_group, | |
1073 | NULL | |
1074 | }; | |
9d19f48c | 1075 | |
877211f5 | 1076 | static int snd_pcm_dev_register(struct snd_device *device) |
1da177e4 | 1077 | { |
f87135f5 | 1078 | int cidx, err; |
877211f5 | 1079 | struct snd_pcm_substream *substream; |
9244b2c3 | 1080 | struct snd_pcm_notify *notify; |
1da177e4 | 1081 | char str[16]; |
4b3be6af | 1082 | struct snd_pcm *pcm; |
c78085fc | 1083 | struct device *dev; |
1da177e4 | 1084 | |
4b3be6af | 1085 | if (snd_BUG_ON(!device || !device->device_data)) |
7eaa943c | 1086 | return -ENXIO; |
4b3be6af | 1087 | pcm = device->device_data; |
1a60d4c5 | 1088 | mutex_lock(®ister_mutex); |
f90c06a2 PM |
1089 | err = snd_pcm_add(pcm); |
1090 | if (err) { | |
1a60d4c5 | 1091 | mutex_unlock(®ister_mutex); |
f90c06a2 | 1092 | return err; |
1da177e4 | 1093 | } |
1da177e4 LT |
1094 | for (cidx = 0; cidx < 2; cidx++) { |
1095 | int devtype = -1; | |
945e5038 | 1096 | if (pcm->streams[cidx].substream == NULL || pcm->internal) |
1da177e4 LT |
1097 | continue; |
1098 | switch (cidx) { | |
1099 | case SNDRV_PCM_STREAM_PLAYBACK: | |
1100 | sprintf(str, "pcmC%iD%ip", pcm->card->number, pcm->device); | |
1da177e4 LT |
1101 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
1102 | break; | |
1103 | case SNDRV_PCM_STREAM_CAPTURE: | |
1104 | sprintf(str, "pcmC%iD%ic", pcm->card->number, pcm->device); | |
1da177e4 LT |
1105 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
1106 | break; | |
1107 | } | |
c78085fc JB |
1108 | /* device pointer to use, pcm->dev takes precedence if |
1109 | * it is assigned, otherwise fall back to card's device | |
1110 | * if possible */ | |
1111 | dev = pcm->dev; | |
1112 | if (!dev) | |
c2902c8a | 1113 | dev = snd_card_get_device_link(pcm->card); |
c78085fc JB |
1114 | /* register pcm */ |
1115 | err = snd_register_device_for_dev(devtype, pcm->card, | |
1116 | pcm->device, | |
1117 | &snd_pcm_f_ops[cidx], | |
92b7952d | 1118 | pcm, NULL, dev, str); |
c78085fc | 1119 | if (err < 0) { |
f87135f5 | 1120 | list_del(&pcm->list); |
1a60d4c5 | 1121 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1122 | return err; |
1123 | } | |
caa751ba TI |
1124 | |
1125 | dev = snd_get_device(devtype, pcm->card, pcm->device); | |
1126 | if (dev) { | |
1127 | err = sysfs_create_groups(&dev->kobj, | |
1128 | pcm_dev_attr_groups); | |
1129 | if (err < 0) | |
1130 | dev_warn(dev, | |
1131 | "pcm %d:%d: cannot create sysfs groups\n", | |
1132 | pcm->card->number, pcm->device); | |
1133 | put_device(dev); | |
1134 | } | |
1135 | ||
1da177e4 LT |
1136 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
1137 | snd_pcm_timer_init(substream); | |
1138 | } | |
9244b2c3 JB |
1139 | |
1140 | list_for_each_entry(notify, &snd_pcm_notify_list, list) | |
1da177e4 | 1141 | notify->n_register(pcm); |
9244b2c3 | 1142 | |
1a60d4c5 | 1143 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1144 | return 0; |
1145 | } | |
1146 | ||
877211f5 | 1147 | static int snd_pcm_dev_disconnect(struct snd_device *device) |
1da177e4 | 1148 | { |
877211f5 | 1149 | struct snd_pcm *pcm = device->device_data; |
c461482c | 1150 | struct snd_pcm_notify *notify; |
877211f5 | 1151 | struct snd_pcm_substream *substream; |
c461482c | 1152 | int cidx, devtype; |
1da177e4 | 1153 | |
1a60d4c5 | 1154 | mutex_lock(®ister_mutex); |
c461482c TI |
1155 | if (list_empty(&pcm->list)) |
1156 | goto unlock; | |
1157 | ||
9b0573c0 | 1158 | mutex_lock(&pcm->open_mutex); |
0914f796 | 1159 | wake_up(&pcm->open_wait); |
f87135f5 | 1160 | list_del_init(&pcm->list); |
1da177e4 | 1161 | for (cidx = 0; cidx < 2; cidx++) |
9b0573c0 TI |
1162 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) { |
1163 | snd_pcm_stream_lock_irq(substream); | |
0914f796 | 1164 | if (substream->runtime) { |
1da177e4 | 1165 | substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED; |
0914f796 TI |
1166 | wake_up(&substream->runtime->sleep); |
1167 | wake_up(&substream->runtime->tsleep); | |
1168 | } | |
9b0573c0 TI |
1169 | snd_pcm_stream_unlock_irq(substream); |
1170 | } | |
c461482c | 1171 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
1da177e4 LT |
1172 | notify->n_disconnect(pcm); |
1173 | } | |
1da177e4 LT |
1174 | for (cidx = 0; cidx < 2; cidx++) { |
1175 | devtype = -1; | |
1176 | switch (cidx) { | |
1177 | case SNDRV_PCM_STREAM_PLAYBACK: | |
1178 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; | |
1179 | break; | |
1180 | case SNDRV_PCM_STREAM_CAPTURE: | |
1181 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; | |
1182 | break; | |
1183 | } | |
1184 | snd_unregister_device(devtype, pcm->card, pcm->device); | |
2d3391ec TI |
1185 | if (pcm->streams[cidx].chmap_kctl) { |
1186 | snd_ctl_remove(pcm->card, pcm->streams[cidx].chmap_kctl); | |
1187 | pcm->streams[cidx].chmap_kctl = NULL; | |
1188 | } | |
1da177e4 | 1189 | } |
9b0573c0 | 1190 | mutex_unlock(&pcm->open_mutex); |
c461482c | 1191 | unlock: |
1a60d4c5 | 1192 | mutex_unlock(®ister_mutex); |
c461482c | 1193 | return 0; |
1da177e4 LT |
1194 | } |
1195 | ||
30b771cf TI |
1196 | /** |
1197 | * snd_pcm_notify - Add/remove the notify list | |
1198 | * @notify: PCM notify list | |
1199 | * @nfree: 0 = register, 1 = unregister | |
1200 | * | |
1201 | * This adds the given notifier to the global list so that the callback is | |
1202 | * called for each registered PCM devices. This exists only for PCM OSS | |
1203 | * emulation, so far. | |
1204 | */ | |
877211f5 | 1205 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree) |
1da177e4 | 1206 | { |
9244b2c3 | 1207 | struct snd_pcm *pcm; |
1da177e4 | 1208 | |
7eaa943c TI |
1209 | if (snd_BUG_ON(!notify || |
1210 | !notify->n_register || | |
1211 | !notify->n_unregister || | |
1212 | !notify->n_disconnect)) | |
1213 | return -EINVAL; | |
1a60d4c5 | 1214 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1215 | if (nfree) { |
1216 | list_del(¬ify->list); | |
9244b2c3 JB |
1217 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1218 | notify->n_unregister(pcm); | |
1da177e4 LT |
1219 | } else { |
1220 | list_add_tail(¬ify->list, &snd_pcm_notify_list); | |
9244b2c3 JB |
1221 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1222 | notify->n_register(pcm); | |
1da177e4 | 1223 | } |
1a60d4c5 | 1224 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1225 | return 0; |
1226 | } | |
e88e8ae6 TI |
1227 | EXPORT_SYMBOL(snd_pcm_notify); |
1228 | ||
e28563cc | 1229 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1230 | /* |
1231 | * Info interface | |
1232 | */ | |
1233 | ||
877211f5 TI |
1234 | static void snd_pcm_proc_read(struct snd_info_entry *entry, |
1235 | struct snd_info_buffer *buffer) | |
1da177e4 | 1236 | { |
877211f5 | 1237 | struct snd_pcm *pcm; |
1da177e4 | 1238 | |
1a60d4c5 | 1239 | mutex_lock(®ister_mutex); |
9244b2c3 | 1240 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
f87135f5 CL |
1241 | snd_iprintf(buffer, "%02i-%02i: %s : %s", |
1242 | pcm->card->number, pcm->device, pcm->id, pcm->name); | |
1da177e4 | 1243 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) |
877211f5 TI |
1244 | snd_iprintf(buffer, " : playback %i", |
1245 | pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count); | |
1da177e4 | 1246 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) |
877211f5 TI |
1247 | snd_iprintf(buffer, " : capture %i", |
1248 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); | |
1da177e4 LT |
1249 | snd_iprintf(buffer, "\n"); |
1250 | } | |
1a60d4c5 | 1251 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1252 | } |
1253 | ||
6581f4e7 | 1254 | static struct snd_info_entry *snd_pcm_proc_entry; |
1da177e4 | 1255 | |
e28563cc | 1256 | static void snd_pcm_proc_init(void) |
1da177e4 | 1257 | { |
877211f5 | 1258 | struct snd_info_entry *entry; |
1da177e4 | 1259 | |
1da177e4 | 1260 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) { |
bf850204 | 1261 | snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read); |
1da177e4 LT |
1262 | if (snd_info_register(entry) < 0) { |
1263 | snd_info_free_entry(entry); | |
1264 | entry = NULL; | |
1265 | } | |
1266 | } | |
1267 | snd_pcm_proc_entry = entry; | |
e28563cc TI |
1268 | } |
1269 | ||
1270 | static void snd_pcm_proc_done(void) | |
1271 | { | |
746d4a02 | 1272 | snd_info_free_entry(snd_pcm_proc_entry); |
e28563cc TI |
1273 | } |
1274 | ||
1275 | #else /* !CONFIG_PROC_FS */ | |
1276 | #define snd_pcm_proc_init() | |
1277 | #define snd_pcm_proc_done() | |
1278 | #endif /* CONFIG_PROC_FS */ | |
1279 | ||
1280 | ||
1281 | /* | |
1282 | * ENTRY functions | |
1283 | */ | |
1284 | ||
1285 | static int __init alsa_pcm_init(void) | |
1286 | { | |
1287 | snd_ctl_register_ioctl(snd_pcm_control_ioctl); | |
1288 | snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl); | |
1289 | snd_pcm_proc_init(); | |
1da177e4 LT |
1290 | return 0; |
1291 | } | |
1292 | ||
1293 | static void __exit alsa_pcm_exit(void) | |
1294 | { | |
1295 | snd_ctl_unregister_ioctl(snd_pcm_control_ioctl); | |
1296 | snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl); | |
e28563cc | 1297 | snd_pcm_proc_done(); |
1da177e4 LT |
1298 | } |
1299 | ||
1300 | module_init(alsa_pcm_init) | |
1301 | module_exit(alsa_pcm_exit) |