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), | |
1da177e4 LT |
218 | }; |
219 | ||
6e5265ec | 220 | const char *snd_pcm_format_name(snd_pcm_format_t format) |
e28563cc | 221 | { |
fea952e5 | 222 | if ((__force unsigned int)format >= ARRAY_SIZE(snd_pcm_format_names)) |
7a28826a | 223 | return "Unknown"; |
fea952e5 | 224 | return snd_pcm_format_names[(__force unsigned int)format]; |
e28563cc | 225 | } |
6e5265ec TI |
226 | EXPORT_SYMBOL_GPL(snd_pcm_format_name); |
227 | ||
228 | #ifdef CONFIG_SND_VERBOSE_PROCFS | |
229 | ||
230 | #define STATE(v) [SNDRV_PCM_STATE_##v] = #v | |
231 | #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v | |
232 | #define READY(v) [SNDRV_PCM_READY_##v] = #v | |
233 | #define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v | |
234 | #define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v | |
235 | #define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v | |
236 | #define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v | |
237 | #define START(v) [SNDRV_PCM_START_##v] = #v | |
238 | #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v | |
e28563cc | 239 | |
e28563cc TI |
240 | static char *snd_pcm_stream_names[] = { |
241 | STREAM(PLAYBACK), | |
242 | STREAM(CAPTURE), | |
243 | }; | |
244 | ||
245 | static char *snd_pcm_state_names[] = { | |
246 | STATE(OPEN), | |
247 | STATE(SETUP), | |
248 | STATE(PREPARED), | |
249 | STATE(RUNNING), | |
250 | STATE(XRUN), | |
251 | STATE(DRAINING), | |
252 | STATE(PAUSED), | |
253 | STATE(SUSPENDED), | |
254 | }; | |
255 | ||
256 | static char *snd_pcm_access_names[] = { | |
257 | ACCESS(MMAP_INTERLEAVED), | |
258 | ACCESS(MMAP_NONINTERLEAVED), | |
259 | ACCESS(MMAP_COMPLEX), | |
260 | ACCESS(RW_INTERLEAVED), | |
261 | ACCESS(RW_NONINTERLEAVED), | |
262 | }; | |
263 | ||
1da177e4 LT |
264 | static char *snd_pcm_subformat_names[] = { |
265 | SUBFORMAT(STD), | |
266 | }; | |
267 | ||
268 | static char *snd_pcm_tstamp_mode_names[] = { | |
269 | TSTAMP(NONE), | |
8c121586 | 270 | TSTAMP(ENABLE), |
1da177e4 LT |
271 | }; |
272 | ||
877211f5 | 273 | static const char *snd_pcm_stream_name(int stream) |
1da177e4 | 274 | { |
1da177e4 LT |
275 | return snd_pcm_stream_names[stream]; |
276 | } | |
277 | ||
278 | static const char *snd_pcm_access_name(snd_pcm_access_t access) | |
279 | { | |
fea952e5 | 280 | return snd_pcm_access_names[(__force int)access]; |
1da177e4 LT |
281 | } |
282 | ||
1da177e4 LT |
283 | static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat) |
284 | { | |
fea952e5 | 285 | return snd_pcm_subformat_names[(__force int)subformat]; |
1da177e4 LT |
286 | } |
287 | ||
877211f5 | 288 | static const char *snd_pcm_tstamp_mode_name(int mode) |
1da177e4 | 289 | { |
1da177e4 LT |
290 | return snd_pcm_tstamp_mode_names[mode]; |
291 | } | |
292 | ||
293 | static const char *snd_pcm_state_name(snd_pcm_state_t state) | |
294 | { | |
fea952e5 | 295 | return snd_pcm_state_names[(__force int)state]; |
1da177e4 LT |
296 | } |
297 | ||
8eeaa2f9 | 298 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 | 299 | #include <linux/soundcard.h> |
1a60d4c5 | 300 | |
1da177e4 LT |
301 | static const char *snd_pcm_oss_format_name(int format) |
302 | { | |
303 | switch (format) { | |
304 | case AFMT_MU_LAW: | |
305 | return "MU_LAW"; | |
306 | case AFMT_A_LAW: | |
307 | return "A_LAW"; | |
308 | case AFMT_IMA_ADPCM: | |
309 | return "IMA_ADPCM"; | |
310 | case AFMT_U8: | |
311 | return "U8"; | |
312 | case AFMT_S16_LE: | |
313 | return "S16_LE"; | |
314 | case AFMT_S16_BE: | |
315 | return "S16_BE"; | |
316 | case AFMT_S8: | |
317 | return "S8"; | |
318 | case AFMT_U16_LE: | |
319 | return "U16_LE"; | |
320 | case AFMT_U16_BE: | |
321 | return "U16_BE"; | |
322 | case AFMT_MPEG: | |
323 | return "MPEG"; | |
324 | default: | |
325 | return "unknown"; | |
326 | } | |
327 | } | |
328 | #endif | |
329 | ||
877211f5 TI |
330 | static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, |
331 | struct snd_info_buffer *buffer) | |
1da177e4 | 332 | { |
877211f5 | 333 | struct snd_pcm_info *info; |
1da177e4 LT |
334 | int err; |
335 | ||
7c22f1aa TI |
336 | if (! substream) |
337 | return; | |
1da177e4 LT |
338 | |
339 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
340 | if (! info) { | |
09e56df8 TI |
341 | pcm_dbg(substream->pcm, |
342 | "snd_pcm_proc_info_read: cannot malloc\n"); | |
1da177e4 LT |
343 | return; |
344 | } | |
345 | ||
346 | err = snd_pcm_info(substream, info); | |
347 | if (err < 0) { | |
348 | snd_iprintf(buffer, "error %d\n", err); | |
349 | kfree(info); | |
350 | return; | |
351 | } | |
352 | snd_iprintf(buffer, "card: %d\n", info->card); | |
353 | snd_iprintf(buffer, "device: %d\n", info->device); | |
354 | snd_iprintf(buffer, "subdevice: %d\n", info->subdevice); | |
355 | snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream)); | |
356 | snd_iprintf(buffer, "id: %s\n", info->id); | |
357 | snd_iprintf(buffer, "name: %s\n", info->name); | |
358 | snd_iprintf(buffer, "subname: %s\n", info->subname); | |
359 | snd_iprintf(buffer, "class: %d\n", info->dev_class); | |
360 | snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); | |
361 | snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); | |
362 | snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); | |
363 | kfree(info); | |
364 | } | |
365 | ||
877211f5 TI |
366 | static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry, |
367 | struct snd_info_buffer *buffer) | |
1da177e4 | 368 | { |
877211f5 TI |
369 | snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream, |
370 | buffer); | |
1da177e4 LT |
371 | } |
372 | ||
877211f5 TI |
373 | static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry, |
374 | struct snd_info_buffer *buffer) | |
1da177e4 | 375 | { |
9fe856e4 | 376 | snd_pcm_proc_info_read(entry->private_data, buffer); |
1da177e4 LT |
377 | } |
378 | ||
877211f5 TI |
379 | static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry, |
380 | struct snd_info_buffer *buffer) | |
1da177e4 | 381 | { |
877211f5 | 382 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 TI |
383 | struct snd_pcm_runtime *runtime; |
384 | ||
385 | mutex_lock(&substream->pcm->open_mutex); | |
386 | runtime = substream->runtime; | |
1da177e4 LT |
387 | if (!runtime) { |
388 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 389 | goto unlock; |
1da177e4 | 390 | } |
1da177e4 LT |
391 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
392 | snd_iprintf(buffer, "no setup\n"); | |
901d46d5 | 393 | goto unlock; |
1da177e4 LT |
394 | } |
395 | snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); | |
396 | snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); | |
397 | snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat)); | |
398 | snd_iprintf(buffer, "channels: %u\n", runtime->channels); | |
399 | snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den); | |
400 | snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size); | |
401 | snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size); | |
8eeaa2f9 | 402 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
403 | if (substream->oss.oss) { |
404 | snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format)); | |
405 | snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels); | |
406 | snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate); | |
407 | snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes); | |
408 | snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods); | |
409 | snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); | |
410 | } | |
411 | #endif | |
901d46d5 TI |
412 | unlock: |
413 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 LT |
414 | } |
415 | ||
877211f5 TI |
416 | static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, |
417 | struct snd_info_buffer *buffer) | |
1da177e4 | 418 | { |
877211f5 | 419 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 TI |
420 | struct snd_pcm_runtime *runtime; |
421 | ||
422 | mutex_lock(&substream->pcm->open_mutex); | |
423 | runtime = substream->runtime; | |
1da177e4 LT |
424 | if (!runtime) { |
425 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 426 | goto unlock; |
1da177e4 | 427 | } |
1da177e4 LT |
428 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
429 | snd_iprintf(buffer, "no setup\n"); | |
901d46d5 | 430 | goto unlock; |
1da177e4 LT |
431 | } |
432 | snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); | |
433 | snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); | |
1da177e4 | 434 | snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min); |
1da177e4 LT |
435 | snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold); |
436 | snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold); | |
437 | snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); | |
438 | snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); | |
439 | snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); | |
901d46d5 TI |
440 | unlock: |
441 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 LT |
442 | } |
443 | ||
877211f5 TI |
444 | static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, |
445 | struct snd_info_buffer *buffer) | |
1da177e4 | 446 | { |
877211f5 | 447 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 | 448 | struct snd_pcm_runtime *runtime; |
877211f5 | 449 | struct snd_pcm_status status; |
1da177e4 | 450 | int err; |
901d46d5 TI |
451 | |
452 | mutex_lock(&substream->pcm->open_mutex); | |
453 | runtime = substream->runtime; | |
1da177e4 LT |
454 | if (!runtime) { |
455 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 456 | goto unlock; |
1da177e4 LT |
457 | } |
458 | memset(&status, 0, sizeof(status)); | |
459 | err = snd_pcm_status(substream, &status); | |
460 | if (err < 0) { | |
461 | snd_iprintf(buffer, "error %d\n", err); | |
901d46d5 | 462 | goto unlock; |
1da177e4 LT |
463 | } |
464 | snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); | |
e7373b70 | 465 | snd_iprintf(buffer, "owner_pid : %d\n", pid_vnr(substream->pid)); |
1da177e4 LT |
466 | snd_iprintf(buffer, "trigger_time: %ld.%09ld\n", |
467 | status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec); | |
468 | snd_iprintf(buffer, "tstamp : %ld.%09ld\n", | |
469 | status.tstamp.tv_sec, status.tstamp.tv_nsec); | |
470 | snd_iprintf(buffer, "delay : %ld\n", status.delay); | |
471 | snd_iprintf(buffer, "avail : %ld\n", status.avail); | |
472 | snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max); | |
473 | snd_iprintf(buffer, "-----\n"); | |
474 | snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); | |
475 | snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); | |
901d46d5 TI |
476 | unlock: |
477 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 | 478 | } |
1da177e4 | 479 | |
61fb63c0 | 480 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
877211f5 TI |
481 | static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry, |
482 | struct snd_info_buffer *buffer) | |
1da177e4 | 483 | { |
877211f5 | 484 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
485 | snd_iprintf(buffer, "%d\n", pstr->xrun_debug); |
486 | } | |
487 | ||
877211f5 TI |
488 | static void snd_pcm_xrun_debug_write(struct snd_info_entry *entry, |
489 | struct snd_info_buffer *buffer) | |
1da177e4 | 490 | { |
877211f5 | 491 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
492 | char line[64]; |
493 | if (!snd_info_get_line(buffer, line, sizeof(line))) | |
494 | pstr->xrun_debug = simple_strtoul(line, NULL, 10); | |
495 | } | |
496 | #endif | |
497 | ||
877211f5 | 498 | static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) |
1da177e4 | 499 | { |
877211f5 TI |
500 | struct snd_pcm *pcm = pstr->pcm; |
501 | struct snd_info_entry *entry; | |
1da177e4 LT |
502 | char name[16]; |
503 | ||
504 | sprintf(name, "pcm%i%c", pcm->device, | |
505 | pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); | |
506 | if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL) | |
507 | return -ENOMEM; | |
508 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
509 | if (snd_info_register(entry) < 0) { | |
510 | snd_info_free_entry(entry); | |
511 | return -ENOMEM; | |
512 | } | |
513 | pstr->proc_root = entry; | |
514 | ||
515 | if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) { | |
bf850204 | 516 | snd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read); |
1da177e4 LT |
517 | if (snd_info_register(entry) < 0) { |
518 | snd_info_free_entry(entry); | |
519 | entry = NULL; | |
520 | } | |
521 | } | |
522 | pstr->proc_info_entry = entry; | |
523 | ||
61fb63c0 | 524 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
877211f5 TI |
525 | if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug", |
526 | pstr->proc_root)) != NULL) { | |
1da177e4 | 527 | entry->c.text.read = snd_pcm_xrun_debug_read; |
1da177e4 | 528 | entry->c.text.write = snd_pcm_xrun_debug_write; |
bd7bf042 | 529 | entry->mode |= S_IWUSR; |
1da177e4 LT |
530 | entry->private_data = pstr; |
531 | if (snd_info_register(entry) < 0) { | |
532 | snd_info_free_entry(entry); | |
533 | entry = NULL; | |
534 | } | |
535 | } | |
536 | pstr->proc_xrun_debug_entry = entry; | |
537 | #endif | |
538 | return 0; | |
539 | } | |
540 | ||
877211f5 | 541 | static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) |
1da177e4 | 542 | { |
61fb63c0 | 543 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
746d4a02 TI |
544 | snd_info_free_entry(pstr->proc_xrun_debug_entry); |
545 | pstr->proc_xrun_debug_entry = NULL; | |
1da177e4 | 546 | #endif |
746d4a02 TI |
547 | snd_info_free_entry(pstr->proc_info_entry); |
548 | pstr->proc_info_entry = NULL; | |
549 | snd_info_free_entry(pstr->proc_root); | |
550 | pstr->proc_root = NULL; | |
1da177e4 LT |
551 | return 0; |
552 | } | |
553 | ||
877211f5 | 554 | static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) |
1da177e4 | 555 | { |
877211f5 TI |
556 | struct snd_info_entry *entry; |
557 | struct snd_card *card; | |
1da177e4 LT |
558 | char name[16]; |
559 | ||
560 | card = substream->pcm->card; | |
561 | ||
562 | sprintf(name, "sub%i", substream->number); | |
563 | if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL) | |
564 | return -ENOMEM; | |
565 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
566 | if (snd_info_register(entry) < 0) { | |
567 | snd_info_free_entry(entry); | |
568 | return -ENOMEM; | |
569 | } | |
570 | substream->proc_root = entry; | |
571 | ||
572 | if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) { | |
bf850204 TI |
573 | snd_info_set_text_ops(entry, substream, |
574 | snd_pcm_substream_proc_info_read); | |
1da177e4 LT |
575 | if (snd_info_register(entry) < 0) { |
576 | snd_info_free_entry(entry); | |
577 | entry = NULL; | |
578 | } | |
579 | } | |
580 | substream->proc_info_entry = entry; | |
581 | ||
582 | if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
583 | snd_info_set_text_ops(entry, substream, |
584 | snd_pcm_substream_proc_hw_params_read); | |
1da177e4 LT |
585 | if (snd_info_register(entry) < 0) { |
586 | snd_info_free_entry(entry); | |
587 | entry = NULL; | |
588 | } | |
589 | } | |
590 | substream->proc_hw_params_entry = entry; | |
591 | ||
592 | if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
593 | snd_info_set_text_ops(entry, substream, |
594 | snd_pcm_substream_proc_sw_params_read); | |
1da177e4 LT |
595 | if (snd_info_register(entry) < 0) { |
596 | snd_info_free_entry(entry); | |
597 | entry = NULL; | |
598 | } | |
599 | } | |
600 | substream->proc_sw_params_entry = entry; | |
601 | ||
602 | if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) { | |
bf850204 TI |
603 | snd_info_set_text_ops(entry, substream, |
604 | snd_pcm_substream_proc_status_read); | |
1da177e4 LT |
605 | if (snd_info_register(entry) < 0) { |
606 | snd_info_free_entry(entry); | |
607 | entry = NULL; | |
608 | } | |
609 | } | |
610 | substream->proc_status_entry = entry; | |
611 | ||
612 | return 0; | |
613 | } | |
746d4a02 | 614 | |
877211f5 | 615 | static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) |
1da177e4 | 616 | { |
746d4a02 TI |
617 | snd_info_free_entry(substream->proc_info_entry); |
618 | substream->proc_info_entry = NULL; | |
619 | snd_info_free_entry(substream->proc_hw_params_entry); | |
620 | substream->proc_hw_params_entry = NULL; | |
621 | snd_info_free_entry(substream->proc_sw_params_entry); | |
622 | substream->proc_sw_params_entry = NULL; | |
623 | snd_info_free_entry(substream->proc_status_entry); | |
624 | substream->proc_status_entry = NULL; | |
625 | snd_info_free_entry(substream->proc_root); | |
626 | substream->proc_root = NULL; | |
1da177e4 LT |
627 | return 0; |
628 | } | |
b7d90a35 | 629 | #else /* !CONFIG_SND_VERBOSE_PROCFS */ |
e28563cc TI |
630 | static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; } |
631 | static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; } | |
632 | static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; } | |
633 | static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; } | |
b7d90a35 | 634 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
1da177e4 LT |
635 | |
636 | /** | |
637 | * snd_pcm_new_stream - create a new PCM stream | |
638 | * @pcm: the pcm instance | |
639 | * @stream: the stream direction, SNDRV_PCM_STREAM_XXX | |
640 | * @substream_count: the number of substreams | |
641 | * | |
642 | * Creates a new stream for the pcm. | |
643 | * The corresponding stream on the pcm must have been empty before | |
644 | * calling this, i.e. zero must be given to the argument of | |
645 | * snd_pcm_new(). | |
646 | * | |
eb7c06e8 | 647 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 648 | */ |
877211f5 | 649 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count) |
1da177e4 LT |
650 | { |
651 | int idx, err; | |
877211f5 TI |
652 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
653 | struct snd_pcm_substream *substream, *prev; | |
1da177e4 | 654 | |
8eeaa2f9 | 655 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1a60d4c5 | 656 | mutex_init(&pstr->oss.setup_mutex); |
1da177e4 LT |
657 | #endif |
658 | pstr->stream = stream; | |
659 | pstr->pcm = pcm; | |
660 | pstr->substream_count = substream_count; | |
945e5038 | 661 | if (substream_count > 0 && !pcm->internal) { |
1da177e4 | 662 | err = snd_pcm_stream_proc_init(pstr); |
73e77ba0 | 663 | if (err < 0) { |
09e56df8 | 664 | pcm_err(pcm, "Error in snd_pcm_stream_proc_init\n"); |
1da177e4 | 665 | return err; |
73e77ba0 | 666 | } |
1da177e4 LT |
667 | } |
668 | prev = NULL; | |
669 | for (idx = 0, prev = NULL; idx < substream_count; idx++) { | |
ca2c0966 | 670 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 | 671 | if (substream == NULL) { |
09e56df8 | 672 | pcm_err(pcm, "Cannot allocate PCM substream\n"); |
1da177e4 | 673 | return -ENOMEM; |
73e77ba0 | 674 | } |
1da177e4 LT |
675 | substream->pcm = pcm; |
676 | substream->pstr = pstr; | |
677 | substream->number = idx; | |
678 | substream->stream = stream; | |
679 | sprintf(substream->name, "subdevice #%i", idx); | |
680 | substream->buffer_bytes_max = UINT_MAX; | |
681 | if (prev == NULL) | |
682 | pstr->substream = substream; | |
683 | else | |
684 | prev->next = substream; | |
945e5038 LG |
685 | |
686 | if (!pcm->internal) { | |
687 | err = snd_pcm_substream_proc_init(substream); | |
688 | if (err < 0) { | |
09e56df8 TI |
689 | pcm_err(pcm, |
690 | "Error in snd_pcm_stream_proc_init\n"); | |
945e5038 LG |
691 | if (prev == NULL) |
692 | pstr->substream = NULL; | |
693 | else | |
694 | prev->next = NULL; | |
695 | kfree(substream); | |
696 | return err; | |
697 | } | |
1da177e4 LT |
698 | } |
699 | substream->group = &substream->self_group; | |
700 | spin_lock_init(&substream->self_group.lock); | |
701 | INIT_LIST_HEAD(&substream->self_group.substreams); | |
702 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
9c323fcb | 703 | atomic_set(&substream->mmap_count, 0); |
1da177e4 LT |
704 | prev = substream; |
705 | } | |
706 | return 0; | |
707 | } | |
708 | ||
e88e8ae6 TI |
709 | EXPORT_SYMBOL(snd_pcm_new_stream); |
710 | ||
945e5038 LG |
711 | static int _snd_pcm_new(struct snd_card *card, const char *id, int device, |
712 | int playback_count, int capture_count, bool internal, | |
713 | struct snd_pcm **rpcm) | |
1da177e4 | 714 | { |
877211f5 | 715 | struct snd_pcm *pcm; |
1da177e4 | 716 | int err; |
877211f5 | 717 | static struct snd_device_ops ops = { |
1da177e4 LT |
718 | .dev_free = snd_pcm_dev_free, |
719 | .dev_register = snd_pcm_dev_register, | |
720 | .dev_disconnect = snd_pcm_dev_disconnect, | |
1da177e4 LT |
721 | }; |
722 | ||
7eaa943c TI |
723 | if (snd_BUG_ON(!card)) |
724 | return -ENXIO; | |
725 | if (rpcm) | |
726 | *rpcm = NULL; | |
ca2c0966 | 727 | pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); |
73e77ba0 | 728 | if (pcm == NULL) { |
09e56df8 | 729 | dev_err(card->dev, "Cannot allocate PCM\n"); |
1da177e4 | 730 | return -ENOMEM; |
73e77ba0 | 731 | } |
1da177e4 LT |
732 | pcm->card = card; |
733 | pcm->device = device; | |
945e5038 | 734 | pcm->internal = internal; |
73e77ba0 | 735 | if (id) |
1da177e4 | 736 | strlcpy(pcm->id, id, sizeof(pcm->id)); |
1da177e4 LT |
737 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) { |
738 | snd_pcm_free(pcm); | |
739 | return err; | |
740 | } | |
741 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) { | |
742 | snd_pcm_free(pcm); | |
743 | return err; | |
744 | } | |
1a60d4c5 | 745 | mutex_init(&pcm->open_mutex); |
1da177e4 LT |
746 | init_waitqueue_head(&pcm->open_wait); |
747 | if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) { | |
748 | snd_pcm_free(pcm); | |
749 | return err; | |
750 | } | |
7eaa943c TI |
751 | if (rpcm) |
752 | *rpcm = pcm; | |
1da177e4 LT |
753 | return 0; |
754 | } | |
755 | ||
945e5038 LG |
756 | /** |
757 | * snd_pcm_new - create a new PCM instance | |
758 | * @card: the card instance | |
759 | * @id: the id string | |
760 | * @device: the device index (zero based) | |
761 | * @playback_count: the number of substreams for playback | |
762 | * @capture_count: the number of substreams for capture | |
763 | * @rpcm: the pointer to store the new pcm instance | |
764 | * | |
765 | * Creates a new PCM instance. | |
766 | * | |
767 | * The pcm operators have to be set afterwards to the new instance | |
768 | * via snd_pcm_set_ops(). | |
769 | * | |
eb7c06e8 | 770 | * Return: Zero if successful, or a negative error code on failure. |
945e5038 LG |
771 | */ |
772 | int snd_pcm_new(struct snd_card *card, const char *id, int device, | |
773 | int playback_count, int capture_count, struct snd_pcm **rpcm) | |
774 | { | |
775 | return _snd_pcm_new(card, id, device, playback_count, capture_count, | |
776 | false, rpcm); | |
777 | } | |
e88e8ae6 TI |
778 | EXPORT_SYMBOL(snd_pcm_new); |
779 | ||
945e5038 LG |
780 | /** |
781 | * snd_pcm_new_internal - create a new internal PCM instance | |
782 | * @card: the card instance | |
783 | * @id: the id string | |
784 | * @device: the device index (zero based - shared with normal PCMs) | |
785 | * @playback_count: the number of substreams for playback | |
786 | * @capture_count: the number of substreams for capture | |
787 | * @rpcm: the pointer to store the new pcm instance | |
788 | * | |
789 | * Creates a new internal PCM instance with no userspace device or procfs | |
790 | * entries. This is used by ASoC Back End PCMs in order to create a PCM that | |
791 | * will only be used internally by kernel drivers. i.e. it cannot be opened | |
792 | * by userspace. It provides existing ASoC components drivers with a substream | |
793 | * and access to any private data. | |
794 | * | |
795 | * The pcm operators have to be set afterwards to the new instance | |
796 | * via snd_pcm_set_ops(). | |
797 | * | |
eb7c06e8 | 798 | * Return: Zero if successful, or a negative error code on failure. |
945e5038 LG |
799 | */ |
800 | int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, | |
801 | int playback_count, int capture_count, | |
802 | struct snd_pcm **rpcm) | |
803 | { | |
804 | return _snd_pcm_new(card, id, device, playback_count, capture_count, | |
805 | true, rpcm); | |
806 | } | |
807 | EXPORT_SYMBOL(snd_pcm_new_internal); | |
808 | ||
877211f5 | 809 | static void snd_pcm_free_stream(struct snd_pcm_str * pstr) |
1da177e4 | 810 | { |
877211f5 | 811 | struct snd_pcm_substream *substream, *substream_next; |
8eeaa2f9 | 812 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
877211f5 | 813 | struct snd_pcm_oss_setup *setup, *setupn; |
1da177e4 LT |
814 | #endif |
815 | substream = pstr->substream; | |
816 | while (substream) { | |
817 | substream_next = substream->next; | |
c461482c | 818 | snd_pcm_timer_done(substream); |
1da177e4 LT |
819 | snd_pcm_substream_proc_done(substream); |
820 | kfree(substream); | |
821 | substream = substream_next; | |
822 | } | |
823 | snd_pcm_stream_proc_done(pstr); | |
8eeaa2f9 | 824 | #if IS_ENABLED(CONFIG_SND_PCM_OSS) |
1da177e4 LT |
825 | for (setup = pstr->oss.setup_list; setup; setup = setupn) { |
826 | setupn = setup->next; | |
827 | kfree(setup->task_name); | |
828 | kfree(setup); | |
829 | } | |
830 | #endif | |
831 | } | |
832 | ||
877211f5 | 833 | static int snd_pcm_free(struct snd_pcm *pcm) |
1da177e4 | 834 | { |
c461482c TI |
835 | struct snd_pcm_notify *notify; |
836 | ||
7eaa943c TI |
837 | if (!pcm) |
838 | return 0; | |
c461482c TI |
839 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
840 | notify->n_unregister(pcm); | |
841 | } | |
1da177e4 LT |
842 | if (pcm->private_free) |
843 | pcm->private_free(pcm); | |
844 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
845 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]); | |
846 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]); | |
847 | kfree(pcm); | |
848 | return 0; | |
849 | } | |
850 | ||
877211f5 | 851 | static int snd_pcm_dev_free(struct snd_device *device) |
1da177e4 | 852 | { |
877211f5 | 853 | struct snd_pcm *pcm = device->device_data; |
1da177e4 LT |
854 | return snd_pcm_free(pcm); |
855 | } | |
856 | ||
3bf75f9b TI |
857 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, |
858 | struct file *file, | |
859 | struct snd_pcm_substream **rsubstream) | |
1da177e4 | 860 | { |
877211f5 TI |
861 | struct snd_pcm_str * pstr; |
862 | struct snd_pcm_substream *substream; | |
863 | struct snd_pcm_runtime *runtime; | |
864 | struct snd_ctl_file *kctl; | |
865 | struct snd_card *card; | |
1da177e4 LT |
866 | int prefer_subdevice = -1; |
867 | size_t size; | |
868 | ||
7eaa943c TI |
869 | if (snd_BUG_ON(!pcm || !rsubstream)) |
870 | return -ENXIO; | |
1da177e4 | 871 | *rsubstream = NULL; |
1da177e4 | 872 | pstr = &pcm->streams[stream]; |
3bf75f9b | 873 | if (pstr->substream == NULL || pstr->substream_count == 0) |
1da177e4 LT |
874 | return -ENODEV; |
875 | ||
876 | card = pcm->card; | |
399ccdc1 | 877 | read_lock(&card->ctl_files_rwlock); |
9244b2c3 | 878 | list_for_each_entry(kctl, &card->ctl_files, list) { |
25d27ede | 879 | if (kctl->pid == task_pid(current)) { |
1da177e4 | 880 | prefer_subdevice = kctl->prefer_pcm_subdevice; |
2529bba7 TI |
881 | if (prefer_subdevice != -1) |
882 | break; | |
1da177e4 LT |
883 | } |
884 | } | |
399ccdc1 | 885 | read_unlock(&card->ctl_files_rwlock); |
1da177e4 | 886 | |
1da177e4 LT |
887 | switch (stream) { |
888 | case SNDRV_PCM_STREAM_PLAYBACK: | |
889 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
890 | for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; substream; substream = substream->next) { | |
891 | if (SUBSTREAM_BUSY(substream)) | |
892 | return -EAGAIN; | |
893 | } | |
894 | } | |
895 | break; | |
896 | case SNDRV_PCM_STREAM_CAPTURE: | |
897 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
898 | for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next) { | |
899 | if (SUBSTREAM_BUSY(substream)) | |
900 | return -EAGAIN; | |
901 | } | |
902 | } | |
903 | break; | |
904 | default: | |
905 | return -EINVAL; | |
906 | } | |
907 | ||
0df63e44 TI |
908 | if (file->f_flags & O_APPEND) { |
909 | if (prefer_subdevice < 0) { | |
910 | if (pstr->substream_count > 1) | |
911 | return -EINVAL; /* must be unique */ | |
912 | substream = pstr->substream; | |
913 | } else { | |
914 | for (substream = pstr->substream; substream; | |
915 | substream = substream->next) | |
916 | if (substream->number == prefer_subdevice) | |
917 | break; | |
918 | } | |
919 | if (! substream) | |
920 | return -ENODEV; | |
921 | if (! SUBSTREAM_BUSY(substream)) | |
922 | return -EBADFD; | |
923 | substream->ref_count++; | |
924 | *rsubstream = substream; | |
925 | return 0; | |
926 | } | |
927 | ||
1da177e4 LT |
928 | if (prefer_subdevice >= 0) { |
929 | for (substream = pstr->substream; substream; substream = substream->next) | |
930 | if (!SUBSTREAM_BUSY(substream) && substream->number == prefer_subdevice) | |
931 | goto __ok; | |
932 | } | |
933 | for (substream = pstr->substream; substream; substream = substream->next) | |
934 | if (!SUBSTREAM_BUSY(substream)) | |
935 | break; | |
936 | __ok: | |
937 | if (substream == NULL) | |
938 | return -EAGAIN; | |
939 | ||
ca2c0966 | 940 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
1da177e4 LT |
941 | if (runtime == NULL) |
942 | return -ENOMEM; | |
943 | ||
877211f5 | 944 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)); |
1da177e4 LT |
945 | runtime->status = snd_malloc_pages(size, GFP_KERNEL); |
946 | if (runtime->status == NULL) { | |
947 | kfree(runtime); | |
948 | return -ENOMEM; | |
949 | } | |
950 | memset((void*)runtime->status, 0, size); | |
951 | ||
877211f5 | 952 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)); |
1da177e4 LT |
953 | runtime->control = snd_malloc_pages(size, GFP_KERNEL); |
954 | if (runtime->control == NULL) { | |
877211f5 TI |
955 | snd_free_pages((void*)runtime->status, |
956 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
1da177e4 LT |
957 | kfree(runtime); |
958 | return -ENOMEM; | |
959 | } | |
960 | memset((void*)runtime->control, 0, size); | |
961 | ||
962 | init_waitqueue_head(&runtime->sleep); | |
c91a988d | 963 | init_waitqueue_head(&runtime->tsleep); |
1da177e4 LT |
964 | |
965 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
966 | ||
967 | substream->runtime = runtime; | |
968 | substream->private_data = pcm->private_data; | |
0df63e44 TI |
969 | substream->ref_count = 1; |
970 | substream->f_flags = file->f_flags; | |
e7373b70 | 971 | substream->pid = get_pid(task_pid(current)); |
1da177e4 LT |
972 | pstr->substream_opened++; |
973 | *rsubstream = substream; | |
974 | return 0; | |
975 | } | |
976 | ||
3bf75f9b | 977 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream) |
1da177e4 | 978 | { |
877211f5 | 979 | struct snd_pcm_runtime *runtime; |
0df63e44 | 980 | |
7eaa943c TI |
981 | if (PCM_RUNTIME_CHECK(substream)) |
982 | return; | |
1da177e4 | 983 | runtime = substream->runtime; |
1da177e4 LT |
984 | if (runtime->private_free != NULL) |
985 | runtime->private_free(runtime); | |
877211f5 TI |
986 | snd_free_pages((void*)runtime->status, |
987 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
988 | snd_free_pages((void*)runtime->control, | |
989 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))); | |
1da177e4 | 990 | kfree(runtime->hw_constraints.rules); |
4d96eb25 | 991 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
51d503de | 992 | kfree(runtime->hwptr_log); |
4d96eb25 | 993 | #endif |
1da177e4 LT |
994 | kfree(runtime); |
995 | substream->runtime = NULL; | |
e7373b70 CL |
996 | put_pid(substream->pid); |
997 | substream->pid = NULL; | |
1da177e4 LT |
998 | substream->pstr->substream_opened--; |
999 | } | |
1000 | ||
d80f19fa GKH |
1001 | static ssize_t show_pcm_class(struct device *dev, |
1002 | struct device_attribute *attr, char *buf) | |
9d19f48c TI |
1003 | { |
1004 | struct snd_pcm *pcm; | |
1005 | const char *str; | |
1006 | static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = { | |
1007 | [SNDRV_PCM_CLASS_GENERIC] = "generic", | |
1008 | [SNDRV_PCM_CLASS_MULTI] = "multi", | |
1009 | [SNDRV_PCM_CLASS_MODEM] = "modem", | |
1010 | [SNDRV_PCM_CLASS_DIGITIZER] = "digitizer", | |
1011 | }; | |
1012 | ||
d80f19fa | 1013 | if (! (pcm = dev_get_drvdata(dev)) || |
9d19f48c TI |
1014 | pcm->dev_class > SNDRV_PCM_CLASS_LAST) |
1015 | str = "none"; | |
1016 | else | |
1017 | str = strs[pcm->dev_class]; | |
1018 | return snprintf(buf, PAGE_SIZE, "%s\n", str); | |
1019 | } | |
1020 | ||
caa751ba TI |
1021 | static DEVICE_ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL); |
1022 | static struct attribute *pcm_dev_attrs[] = { | |
1023 | &dev_attr_pcm_class.attr, | |
1024 | NULL | |
1025 | }; | |
1026 | ||
1027 | static struct attribute_group pcm_dev_attr_group = { | |
1028 | .attrs = pcm_dev_attrs, | |
1029 | }; | |
1030 | ||
1031 | static const struct attribute_group *pcm_dev_attr_groups[] = { | |
1032 | &pcm_dev_attr_group, | |
1033 | NULL | |
1034 | }; | |
9d19f48c | 1035 | |
877211f5 | 1036 | static int snd_pcm_dev_register(struct snd_device *device) |
1da177e4 | 1037 | { |
f87135f5 | 1038 | int cidx, err; |
877211f5 | 1039 | struct snd_pcm_substream *substream; |
9244b2c3 | 1040 | struct snd_pcm_notify *notify; |
1da177e4 | 1041 | char str[16]; |
4b3be6af | 1042 | struct snd_pcm *pcm; |
c78085fc | 1043 | struct device *dev; |
1da177e4 | 1044 | |
4b3be6af | 1045 | if (snd_BUG_ON(!device || !device->device_data)) |
7eaa943c | 1046 | return -ENXIO; |
4b3be6af | 1047 | pcm = device->device_data; |
1a60d4c5 | 1048 | mutex_lock(®ister_mutex); |
f90c06a2 PM |
1049 | err = snd_pcm_add(pcm); |
1050 | if (err) { | |
1a60d4c5 | 1051 | mutex_unlock(®ister_mutex); |
f90c06a2 | 1052 | return err; |
1da177e4 | 1053 | } |
1da177e4 LT |
1054 | for (cidx = 0; cidx < 2; cidx++) { |
1055 | int devtype = -1; | |
945e5038 | 1056 | if (pcm->streams[cidx].substream == NULL || pcm->internal) |
1da177e4 LT |
1057 | continue; |
1058 | switch (cidx) { | |
1059 | case SNDRV_PCM_STREAM_PLAYBACK: | |
1060 | sprintf(str, "pcmC%iD%ip", pcm->card->number, pcm->device); | |
1da177e4 LT |
1061 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
1062 | break; | |
1063 | case SNDRV_PCM_STREAM_CAPTURE: | |
1064 | sprintf(str, "pcmC%iD%ic", pcm->card->number, pcm->device); | |
1da177e4 LT |
1065 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
1066 | break; | |
1067 | } | |
c78085fc JB |
1068 | /* device pointer to use, pcm->dev takes precedence if |
1069 | * it is assigned, otherwise fall back to card's device | |
1070 | * if possible */ | |
1071 | dev = pcm->dev; | |
1072 | if (!dev) | |
c2902c8a | 1073 | dev = snd_card_get_device_link(pcm->card); |
c78085fc JB |
1074 | /* register pcm */ |
1075 | err = snd_register_device_for_dev(devtype, pcm->card, | |
1076 | pcm->device, | |
1077 | &snd_pcm_f_ops[cidx], | |
1078 | pcm, str, dev); | |
1079 | if (err < 0) { | |
f87135f5 | 1080 | list_del(&pcm->list); |
1a60d4c5 | 1081 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1082 | return err; |
1083 | } | |
caa751ba TI |
1084 | |
1085 | dev = snd_get_device(devtype, pcm->card, pcm->device); | |
1086 | if (dev) { | |
1087 | err = sysfs_create_groups(&dev->kobj, | |
1088 | pcm_dev_attr_groups); | |
1089 | if (err < 0) | |
1090 | dev_warn(dev, | |
1091 | "pcm %d:%d: cannot create sysfs groups\n", | |
1092 | pcm->card->number, pcm->device); | |
1093 | put_device(dev); | |
1094 | } | |
1095 | ||
1da177e4 LT |
1096 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
1097 | snd_pcm_timer_init(substream); | |
1098 | } | |
9244b2c3 JB |
1099 | |
1100 | list_for_each_entry(notify, &snd_pcm_notify_list, list) | |
1da177e4 | 1101 | notify->n_register(pcm); |
9244b2c3 | 1102 | |
1a60d4c5 | 1103 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1104 | return 0; |
1105 | } | |
1106 | ||
877211f5 | 1107 | static int snd_pcm_dev_disconnect(struct snd_device *device) |
1da177e4 | 1108 | { |
877211f5 | 1109 | struct snd_pcm *pcm = device->device_data; |
c461482c | 1110 | struct snd_pcm_notify *notify; |
877211f5 | 1111 | struct snd_pcm_substream *substream; |
c461482c | 1112 | int cidx, devtype; |
1da177e4 | 1113 | |
1a60d4c5 | 1114 | mutex_lock(®ister_mutex); |
c461482c TI |
1115 | if (list_empty(&pcm->list)) |
1116 | goto unlock; | |
1117 | ||
9b0573c0 | 1118 | mutex_lock(&pcm->open_mutex); |
0914f796 | 1119 | wake_up(&pcm->open_wait); |
f87135f5 | 1120 | list_del_init(&pcm->list); |
1da177e4 | 1121 | for (cidx = 0; cidx < 2; cidx++) |
9b0573c0 TI |
1122 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) { |
1123 | snd_pcm_stream_lock_irq(substream); | |
0914f796 | 1124 | if (substream->runtime) { |
1da177e4 | 1125 | substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED; |
0914f796 TI |
1126 | wake_up(&substream->runtime->sleep); |
1127 | wake_up(&substream->runtime->tsleep); | |
1128 | } | |
9b0573c0 TI |
1129 | snd_pcm_stream_unlock_irq(substream); |
1130 | } | |
c461482c | 1131 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
1da177e4 LT |
1132 | notify->n_disconnect(pcm); |
1133 | } | |
1da177e4 LT |
1134 | for (cidx = 0; cidx < 2; cidx++) { |
1135 | devtype = -1; | |
1136 | switch (cidx) { | |
1137 | case SNDRV_PCM_STREAM_PLAYBACK: | |
1138 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; | |
1139 | break; | |
1140 | case SNDRV_PCM_STREAM_CAPTURE: | |
1141 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; | |
1142 | break; | |
1143 | } | |
1144 | snd_unregister_device(devtype, pcm->card, pcm->device); | |
2d3391ec TI |
1145 | if (pcm->streams[cidx].chmap_kctl) { |
1146 | snd_ctl_remove(pcm->card, pcm->streams[cidx].chmap_kctl); | |
1147 | pcm->streams[cidx].chmap_kctl = NULL; | |
1148 | } | |
1da177e4 | 1149 | } |
9b0573c0 | 1150 | mutex_unlock(&pcm->open_mutex); |
c461482c | 1151 | unlock: |
1a60d4c5 | 1152 | mutex_unlock(®ister_mutex); |
c461482c | 1153 | return 0; |
1da177e4 LT |
1154 | } |
1155 | ||
877211f5 | 1156 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree) |
1da177e4 | 1157 | { |
9244b2c3 | 1158 | struct snd_pcm *pcm; |
1da177e4 | 1159 | |
7eaa943c TI |
1160 | if (snd_BUG_ON(!notify || |
1161 | !notify->n_register || | |
1162 | !notify->n_unregister || | |
1163 | !notify->n_disconnect)) | |
1164 | return -EINVAL; | |
1a60d4c5 | 1165 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1166 | if (nfree) { |
1167 | list_del(¬ify->list); | |
9244b2c3 JB |
1168 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1169 | notify->n_unregister(pcm); | |
1da177e4 LT |
1170 | } else { |
1171 | list_add_tail(¬ify->list, &snd_pcm_notify_list); | |
9244b2c3 JB |
1172 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1173 | notify->n_register(pcm); | |
1da177e4 | 1174 | } |
1a60d4c5 | 1175 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1176 | return 0; |
1177 | } | |
1178 | ||
e88e8ae6 TI |
1179 | EXPORT_SYMBOL(snd_pcm_notify); |
1180 | ||
e28563cc | 1181 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1182 | /* |
1183 | * Info interface | |
1184 | */ | |
1185 | ||
877211f5 TI |
1186 | static void snd_pcm_proc_read(struct snd_info_entry *entry, |
1187 | struct snd_info_buffer *buffer) | |
1da177e4 | 1188 | { |
877211f5 | 1189 | struct snd_pcm *pcm; |
1da177e4 | 1190 | |
1a60d4c5 | 1191 | mutex_lock(®ister_mutex); |
9244b2c3 | 1192 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
f87135f5 CL |
1193 | snd_iprintf(buffer, "%02i-%02i: %s : %s", |
1194 | pcm->card->number, pcm->device, pcm->id, pcm->name); | |
1da177e4 | 1195 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) |
877211f5 TI |
1196 | snd_iprintf(buffer, " : playback %i", |
1197 | pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count); | |
1da177e4 | 1198 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) |
877211f5 TI |
1199 | snd_iprintf(buffer, " : capture %i", |
1200 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); | |
1da177e4 LT |
1201 | snd_iprintf(buffer, "\n"); |
1202 | } | |
1a60d4c5 | 1203 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1204 | } |
1205 | ||
6581f4e7 | 1206 | static struct snd_info_entry *snd_pcm_proc_entry; |
1da177e4 | 1207 | |
e28563cc | 1208 | static void snd_pcm_proc_init(void) |
1da177e4 | 1209 | { |
877211f5 | 1210 | struct snd_info_entry *entry; |
1da177e4 | 1211 | |
1da177e4 | 1212 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) { |
bf850204 | 1213 | snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read); |
1da177e4 LT |
1214 | if (snd_info_register(entry) < 0) { |
1215 | snd_info_free_entry(entry); | |
1216 | entry = NULL; | |
1217 | } | |
1218 | } | |
1219 | snd_pcm_proc_entry = entry; | |
e28563cc TI |
1220 | } |
1221 | ||
1222 | static void snd_pcm_proc_done(void) | |
1223 | { | |
746d4a02 | 1224 | snd_info_free_entry(snd_pcm_proc_entry); |
e28563cc TI |
1225 | } |
1226 | ||
1227 | #else /* !CONFIG_PROC_FS */ | |
1228 | #define snd_pcm_proc_init() | |
1229 | #define snd_pcm_proc_done() | |
1230 | #endif /* CONFIG_PROC_FS */ | |
1231 | ||
1232 | ||
1233 | /* | |
1234 | * ENTRY functions | |
1235 | */ | |
1236 | ||
1237 | static int __init alsa_pcm_init(void) | |
1238 | { | |
1239 | snd_ctl_register_ioctl(snd_pcm_control_ioctl); | |
1240 | snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl); | |
1241 | snd_pcm_proc_init(); | |
1da177e4 LT |
1242 | return 0; |
1243 | } | |
1244 | ||
1245 | static void __exit alsa_pcm_exit(void) | |
1246 | { | |
1247 | snd_ctl_unregister_ioctl(snd_pcm_control_ioctl); | |
1248 | snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl); | |
e28563cc | 1249 | snd_pcm_proc_done(); |
1da177e4 LT |
1250 | } |
1251 | ||
1252 | module_init(alsa_pcm_init) | |
1253 | module_exit(alsa_pcm_exit) |