Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Digital Audio (PCM) abstract layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
1da177e4 LT |
22 | #include <linux/init.h> |
23 | #include <linux/slab.h> | |
da155d5b | 24 | #include <linux/module.h> |
1da177e4 | 25 | #include <linux/time.h> |
1a60d4c5 | 26 | #include <linux/mutex.h> |
51990e82 | 27 | #include <linux/device.h> |
1da177e4 LT |
28 | #include <sound/core.h> |
29 | #include <sound/minors.h> | |
30 | #include <sound/pcm.h> | |
31 | #include <sound/control.h> | |
32 | #include <sound/info.h> | |
33 | ||
c1017a4c | 34 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); |
1da177e4 LT |
35 | MODULE_DESCRIPTION("Midlevel PCM code for ALSA."); |
36 | MODULE_LICENSE("GPL"); | |
37 | ||
f87135f5 | 38 | static LIST_HEAD(snd_pcm_devices); |
1da177e4 | 39 | static LIST_HEAD(snd_pcm_notify_list); |
1a60d4c5 | 40 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 41 | |
877211f5 TI |
42 | static int snd_pcm_free(struct snd_pcm *pcm); |
43 | static int snd_pcm_dev_free(struct snd_device *device); | |
44 | static int snd_pcm_dev_register(struct snd_device *device); | |
45 | static int snd_pcm_dev_disconnect(struct snd_device *device); | |
1da177e4 | 46 | |
f90c06a2 | 47 | static struct snd_pcm *snd_pcm_get(struct snd_card *card, int device) |
f87135f5 | 48 | { |
f87135f5 CL |
49 | struct snd_pcm *pcm; |
50 | ||
9244b2c3 | 51 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
f87135f5 CL |
52 | if (pcm->card == card && pcm->device == device) |
53 | return pcm; | |
54 | } | |
55 | return NULL; | |
56 | } | |
57 | ||
f90c06a2 PM |
58 | static int snd_pcm_next(struct snd_card *card, int device) |
59 | { | |
60 | struct snd_pcm *pcm; | |
61 | ||
62 | list_for_each_entry(pcm, &snd_pcm_devices, list) { | |
63 | if (pcm->card == card && pcm->device > device) | |
64 | return pcm->device; | |
65 | else if (pcm->card->number > card->number) | |
66 | return -1; | |
67 | } | |
68 | return -1; | |
69 | } | |
70 | ||
71 | static int snd_pcm_add(struct snd_pcm *newpcm) | |
72 | { | |
73 | struct snd_pcm *pcm; | |
74 | ||
75 | list_for_each_entry(pcm, &snd_pcm_devices, list) { | |
76 | if (pcm->card == newpcm->card && pcm->device == newpcm->device) | |
77 | return -EBUSY; | |
78 | if (pcm->card->number > newpcm->card->number || | |
79 | (pcm->card == newpcm->card && | |
80 | pcm->device > newpcm->device)) { | |
81 | list_add(&newpcm->list, pcm->list.prev); | |
82 | return 0; | |
83 | } | |
84 | } | |
85 | list_add_tail(&newpcm->list, &snd_pcm_devices); | |
86 | return 0; | |
87 | } | |
88 | ||
877211f5 TI |
89 | static int snd_pcm_control_ioctl(struct snd_card *card, |
90 | struct snd_ctl_file *control, | |
1da177e4 LT |
91 | unsigned int cmd, unsigned long arg) |
92 | { | |
1da177e4 LT |
93 | switch (cmd) { |
94 | case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE: | |
95 | { | |
96 | int device; | |
97 | ||
98 | if (get_user(device, (int __user *)arg)) | |
99 | return -EFAULT; | |
1a60d4c5 | 100 | mutex_lock(®ister_mutex); |
f90c06a2 | 101 | device = snd_pcm_next(card, device); |
1a60d4c5 | 102 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
103 | if (put_user(device, (int __user *)arg)) |
104 | return -EFAULT; | |
105 | return 0; | |
106 | } | |
107 | case SNDRV_CTL_IOCTL_PCM_INFO: | |
108 | { | |
877211f5 | 109 | struct snd_pcm_info __user *info; |
1da177e4 | 110 | unsigned int device, subdevice; |
877211f5 TI |
111 | int stream; |
112 | struct snd_pcm *pcm; | |
113 | struct snd_pcm_str *pstr; | |
114 | struct snd_pcm_substream *substream; | |
f87135f5 CL |
115 | int err; |
116 | ||
877211f5 | 117 | info = (struct snd_pcm_info __user *)arg; |
1da177e4 LT |
118 | if (get_user(device, &info->device)) |
119 | return -EFAULT; | |
1da177e4 LT |
120 | if (get_user(stream, &info->stream)) |
121 | return -EFAULT; | |
122 | if (stream < 0 || stream > 1) | |
123 | return -EINVAL; | |
1da177e4 LT |
124 | if (get_user(subdevice, &info->subdevice)) |
125 | return -EFAULT; | |
1a60d4c5 | 126 | mutex_lock(®ister_mutex); |
f90c06a2 | 127 | pcm = snd_pcm_get(card, device); |
f87135f5 CL |
128 | if (pcm == NULL) { |
129 | err = -ENXIO; | |
130 | goto _error; | |
131 | } | |
132 | pstr = &pcm->streams[stream]; | |
133 | if (pstr->substream_count == 0) { | |
134 | err = -ENOENT; | |
135 | goto _error; | |
136 | } | |
137 | if (subdevice >= pstr->substream_count) { | |
138 | err = -ENXIO; | |
139 | goto _error; | |
140 | } | |
141 | for (substream = pstr->substream; substream; | |
142 | substream = substream->next) | |
1da177e4 LT |
143 | if (substream->number == (int)subdevice) |
144 | break; | |
f87135f5 CL |
145 | if (substream == NULL) { |
146 | err = -ENXIO; | |
147 | goto _error; | |
148 | } | |
149 | err = snd_pcm_info_user(substream, info); | |
150 | _error: | |
1a60d4c5 | 151 | mutex_unlock(®ister_mutex); |
f87135f5 | 152 | return err; |
1da177e4 LT |
153 | } |
154 | case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE: | |
155 | { | |
156 | int val; | |
157 | ||
158 | if (get_user(val, (int __user *)arg)) | |
159 | return -EFAULT; | |
160 | control->prefer_pcm_subdevice = val; | |
161 | return 0; | |
162 | } | |
163 | } | |
164 | return -ENOIOCTLCMD; | |
165 | } | |
21a3479a | 166 | |
1da177e4 | 167 | #define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v |
1da177e4 | 168 | |
1da177e4 LT |
169 | static char *snd_pcm_format_names[] = { |
170 | FORMAT(S8), | |
171 | FORMAT(U8), | |
172 | FORMAT(S16_LE), | |
173 | FORMAT(S16_BE), | |
174 | FORMAT(U16_LE), | |
175 | FORMAT(U16_BE), | |
176 | FORMAT(S24_LE), | |
177 | FORMAT(S24_BE), | |
178 | FORMAT(U24_LE), | |
179 | FORMAT(U24_BE), | |
180 | FORMAT(S32_LE), | |
181 | FORMAT(S32_BE), | |
182 | FORMAT(U32_LE), | |
183 | FORMAT(U32_BE), | |
184 | FORMAT(FLOAT_LE), | |
185 | FORMAT(FLOAT_BE), | |
186 | FORMAT(FLOAT64_LE), | |
187 | FORMAT(FLOAT64_BE), | |
188 | FORMAT(IEC958_SUBFRAME_LE), | |
189 | FORMAT(IEC958_SUBFRAME_BE), | |
190 | FORMAT(MU_LAW), | |
191 | FORMAT(A_LAW), | |
192 | FORMAT(IMA_ADPCM), | |
193 | FORMAT(MPEG), | |
194 | FORMAT(GSM), | |
195 | FORMAT(SPECIAL), | |
196 | FORMAT(S24_3LE), | |
197 | FORMAT(S24_3BE), | |
198 | FORMAT(U24_3LE), | |
199 | FORMAT(U24_3BE), | |
200 | FORMAT(S20_3LE), | |
201 | FORMAT(S20_3BE), | |
202 | FORMAT(U20_3LE), | |
203 | FORMAT(U20_3BE), | |
204 | FORMAT(S18_3LE), | |
205 | FORMAT(S18_3BE), | |
206 | FORMAT(U18_3LE), | |
207 | FORMAT(U18_3BE), | |
7a28826a DC |
208 | FORMAT(G723_24), |
209 | FORMAT(G723_24_1B), | |
210 | FORMAT(G723_40), | |
211 | FORMAT(G723_40_1B), | |
ef7a4f97 DM |
212 | FORMAT(DSD_U8), |
213 | FORMAT(DSD_U16_LE), | |
1da177e4 LT |
214 | }; |
215 | ||
6e5265ec | 216 | const char *snd_pcm_format_name(snd_pcm_format_t format) |
e28563cc | 217 | { |
fea952e5 | 218 | if ((__force unsigned int)format >= ARRAY_SIZE(snd_pcm_format_names)) |
7a28826a | 219 | return "Unknown"; |
fea952e5 | 220 | return snd_pcm_format_names[(__force unsigned int)format]; |
e28563cc | 221 | } |
6e5265ec TI |
222 | EXPORT_SYMBOL_GPL(snd_pcm_format_name); |
223 | ||
224 | #ifdef CONFIG_SND_VERBOSE_PROCFS | |
225 | ||
226 | #define STATE(v) [SNDRV_PCM_STATE_##v] = #v | |
227 | #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v | |
228 | #define READY(v) [SNDRV_PCM_READY_##v] = #v | |
229 | #define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v | |
230 | #define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v | |
231 | #define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v | |
232 | #define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v | |
233 | #define START(v) [SNDRV_PCM_START_##v] = #v | |
234 | #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v | |
e28563cc | 235 | |
e28563cc TI |
236 | static char *snd_pcm_stream_names[] = { |
237 | STREAM(PLAYBACK), | |
238 | STREAM(CAPTURE), | |
239 | }; | |
240 | ||
241 | static char *snd_pcm_state_names[] = { | |
242 | STATE(OPEN), | |
243 | STATE(SETUP), | |
244 | STATE(PREPARED), | |
245 | STATE(RUNNING), | |
246 | STATE(XRUN), | |
247 | STATE(DRAINING), | |
248 | STATE(PAUSED), | |
249 | STATE(SUSPENDED), | |
250 | }; | |
251 | ||
252 | static char *snd_pcm_access_names[] = { | |
253 | ACCESS(MMAP_INTERLEAVED), | |
254 | ACCESS(MMAP_NONINTERLEAVED), | |
255 | ACCESS(MMAP_COMPLEX), | |
256 | ACCESS(RW_INTERLEAVED), | |
257 | ACCESS(RW_NONINTERLEAVED), | |
258 | }; | |
259 | ||
1da177e4 LT |
260 | static char *snd_pcm_subformat_names[] = { |
261 | SUBFORMAT(STD), | |
262 | }; | |
263 | ||
264 | static char *snd_pcm_tstamp_mode_names[] = { | |
265 | TSTAMP(NONE), | |
8c121586 | 266 | TSTAMP(ENABLE), |
1da177e4 LT |
267 | }; |
268 | ||
877211f5 | 269 | static const char *snd_pcm_stream_name(int stream) |
1da177e4 | 270 | { |
1da177e4 LT |
271 | return snd_pcm_stream_names[stream]; |
272 | } | |
273 | ||
274 | static const char *snd_pcm_access_name(snd_pcm_access_t access) | |
275 | { | |
fea952e5 | 276 | return snd_pcm_access_names[(__force int)access]; |
1da177e4 LT |
277 | } |
278 | ||
1da177e4 LT |
279 | static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat) |
280 | { | |
fea952e5 | 281 | return snd_pcm_subformat_names[(__force int)subformat]; |
1da177e4 LT |
282 | } |
283 | ||
877211f5 | 284 | static const char *snd_pcm_tstamp_mode_name(int mode) |
1da177e4 | 285 | { |
1da177e4 LT |
286 | return snd_pcm_tstamp_mode_names[mode]; |
287 | } | |
288 | ||
289 | static const char *snd_pcm_state_name(snd_pcm_state_t state) | |
290 | { | |
fea952e5 | 291 | return snd_pcm_state_names[(__force int)state]; |
1da177e4 LT |
292 | } |
293 | ||
294 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
295 | #include <linux/soundcard.h> | |
1a60d4c5 | 296 | |
1da177e4 LT |
297 | static const char *snd_pcm_oss_format_name(int format) |
298 | { | |
299 | switch (format) { | |
300 | case AFMT_MU_LAW: | |
301 | return "MU_LAW"; | |
302 | case AFMT_A_LAW: | |
303 | return "A_LAW"; | |
304 | case AFMT_IMA_ADPCM: | |
305 | return "IMA_ADPCM"; | |
306 | case AFMT_U8: | |
307 | return "U8"; | |
308 | case AFMT_S16_LE: | |
309 | return "S16_LE"; | |
310 | case AFMT_S16_BE: | |
311 | return "S16_BE"; | |
312 | case AFMT_S8: | |
313 | return "S8"; | |
314 | case AFMT_U16_LE: | |
315 | return "U16_LE"; | |
316 | case AFMT_U16_BE: | |
317 | return "U16_BE"; | |
318 | case AFMT_MPEG: | |
319 | return "MPEG"; | |
320 | default: | |
321 | return "unknown"; | |
322 | } | |
323 | } | |
324 | #endif | |
325 | ||
877211f5 TI |
326 | static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, |
327 | struct snd_info_buffer *buffer) | |
1da177e4 | 328 | { |
877211f5 | 329 | struct snd_pcm_info *info; |
1da177e4 LT |
330 | int err; |
331 | ||
7c22f1aa TI |
332 | if (! substream) |
333 | return; | |
1da177e4 LT |
334 | |
335 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
336 | if (! info) { | |
337 | printk(KERN_DEBUG "snd_pcm_proc_info_read: cannot malloc\n"); | |
338 | return; | |
339 | } | |
340 | ||
341 | err = snd_pcm_info(substream, info); | |
342 | if (err < 0) { | |
343 | snd_iprintf(buffer, "error %d\n", err); | |
344 | kfree(info); | |
345 | return; | |
346 | } | |
347 | snd_iprintf(buffer, "card: %d\n", info->card); | |
348 | snd_iprintf(buffer, "device: %d\n", info->device); | |
349 | snd_iprintf(buffer, "subdevice: %d\n", info->subdevice); | |
350 | snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream)); | |
351 | snd_iprintf(buffer, "id: %s\n", info->id); | |
352 | snd_iprintf(buffer, "name: %s\n", info->name); | |
353 | snd_iprintf(buffer, "subname: %s\n", info->subname); | |
354 | snd_iprintf(buffer, "class: %d\n", info->dev_class); | |
355 | snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); | |
356 | snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); | |
357 | snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); | |
358 | kfree(info); | |
359 | } | |
360 | ||
877211f5 TI |
361 | static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry, |
362 | struct snd_info_buffer *buffer) | |
1da177e4 | 363 | { |
877211f5 TI |
364 | snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream, |
365 | buffer); | |
1da177e4 LT |
366 | } |
367 | ||
877211f5 TI |
368 | static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry, |
369 | struct snd_info_buffer *buffer) | |
1da177e4 | 370 | { |
9fe856e4 | 371 | snd_pcm_proc_info_read(entry->private_data, buffer); |
1da177e4 LT |
372 | } |
373 | ||
877211f5 TI |
374 | static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry, |
375 | struct snd_info_buffer *buffer) | |
1da177e4 | 376 | { |
877211f5 | 377 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 TI |
378 | struct snd_pcm_runtime *runtime; |
379 | ||
380 | mutex_lock(&substream->pcm->open_mutex); | |
381 | runtime = substream->runtime; | |
1da177e4 LT |
382 | if (!runtime) { |
383 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 384 | goto unlock; |
1da177e4 | 385 | } |
1da177e4 LT |
386 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
387 | snd_iprintf(buffer, "no setup\n"); | |
901d46d5 | 388 | goto unlock; |
1da177e4 LT |
389 | } |
390 | snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); | |
391 | snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); | |
392 | snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat)); | |
393 | snd_iprintf(buffer, "channels: %u\n", runtime->channels); | |
394 | snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den); | |
395 | snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size); | |
396 | snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size); | |
1da177e4 LT |
397 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
398 | if (substream->oss.oss) { | |
399 | snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format)); | |
400 | snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels); | |
401 | snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate); | |
402 | snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes); | |
403 | snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods); | |
404 | snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); | |
405 | } | |
406 | #endif | |
901d46d5 TI |
407 | unlock: |
408 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 LT |
409 | } |
410 | ||
877211f5 TI |
411 | static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, |
412 | struct snd_info_buffer *buffer) | |
1da177e4 | 413 | { |
877211f5 | 414 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 TI |
415 | struct snd_pcm_runtime *runtime; |
416 | ||
417 | mutex_lock(&substream->pcm->open_mutex); | |
418 | runtime = substream->runtime; | |
1da177e4 LT |
419 | if (!runtime) { |
420 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 421 | goto unlock; |
1da177e4 | 422 | } |
1da177e4 LT |
423 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
424 | snd_iprintf(buffer, "no setup\n"); | |
901d46d5 | 425 | goto unlock; |
1da177e4 LT |
426 | } |
427 | snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); | |
428 | snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); | |
1da177e4 | 429 | snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min); |
1da177e4 LT |
430 | snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold); |
431 | snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold); | |
432 | snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); | |
433 | snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); | |
434 | snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); | |
901d46d5 TI |
435 | unlock: |
436 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 LT |
437 | } |
438 | ||
877211f5 TI |
439 | static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, |
440 | struct snd_info_buffer *buffer) | |
1da177e4 | 441 | { |
877211f5 | 442 | struct snd_pcm_substream *substream = entry->private_data; |
901d46d5 | 443 | struct snd_pcm_runtime *runtime; |
877211f5 | 444 | struct snd_pcm_status status; |
1da177e4 | 445 | int err; |
901d46d5 TI |
446 | |
447 | mutex_lock(&substream->pcm->open_mutex); | |
448 | runtime = substream->runtime; | |
1da177e4 LT |
449 | if (!runtime) { |
450 | snd_iprintf(buffer, "closed\n"); | |
901d46d5 | 451 | goto unlock; |
1da177e4 LT |
452 | } |
453 | memset(&status, 0, sizeof(status)); | |
454 | err = snd_pcm_status(substream, &status); | |
455 | if (err < 0) { | |
456 | snd_iprintf(buffer, "error %d\n", err); | |
901d46d5 | 457 | goto unlock; |
1da177e4 LT |
458 | } |
459 | snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); | |
e7373b70 | 460 | snd_iprintf(buffer, "owner_pid : %d\n", pid_vnr(substream->pid)); |
1da177e4 LT |
461 | snd_iprintf(buffer, "trigger_time: %ld.%09ld\n", |
462 | status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec); | |
463 | snd_iprintf(buffer, "tstamp : %ld.%09ld\n", | |
464 | status.tstamp.tv_sec, status.tstamp.tv_nsec); | |
465 | snd_iprintf(buffer, "delay : %ld\n", status.delay); | |
466 | snd_iprintf(buffer, "avail : %ld\n", status.avail); | |
467 | snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max); | |
468 | snd_iprintf(buffer, "-----\n"); | |
469 | snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); | |
470 | snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); | |
901d46d5 TI |
471 | unlock: |
472 | mutex_unlock(&substream->pcm->open_mutex); | |
1da177e4 | 473 | } |
1da177e4 | 474 | |
61fb63c0 | 475 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
877211f5 TI |
476 | static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry, |
477 | struct snd_info_buffer *buffer) | |
1da177e4 | 478 | { |
877211f5 | 479 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
480 | snd_iprintf(buffer, "%d\n", pstr->xrun_debug); |
481 | } | |
482 | ||
877211f5 TI |
483 | static void snd_pcm_xrun_debug_write(struct snd_info_entry *entry, |
484 | struct snd_info_buffer *buffer) | |
1da177e4 | 485 | { |
877211f5 | 486 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
487 | char line[64]; |
488 | if (!snd_info_get_line(buffer, line, sizeof(line))) | |
489 | pstr->xrun_debug = simple_strtoul(line, NULL, 10); | |
490 | } | |
491 | #endif | |
492 | ||
877211f5 | 493 | static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) |
1da177e4 | 494 | { |
877211f5 TI |
495 | struct snd_pcm *pcm = pstr->pcm; |
496 | struct snd_info_entry *entry; | |
1da177e4 LT |
497 | char name[16]; |
498 | ||
499 | sprintf(name, "pcm%i%c", pcm->device, | |
500 | pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); | |
501 | if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL) | |
502 | return -ENOMEM; | |
503 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
504 | if (snd_info_register(entry) < 0) { | |
505 | snd_info_free_entry(entry); | |
506 | return -ENOMEM; | |
507 | } | |
508 | pstr->proc_root = entry; | |
509 | ||
510 | if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) { | |
bf850204 | 511 | snd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read); |
1da177e4 LT |
512 | if (snd_info_register(entry) < 0) { |
513 | snd_info_free_entry(entry); | |
514 | entry = NULL; | |
515 | } | |
516 | } | |
517 | pstr->proc_info_entry = entry; | |
518 | ||
61fb63c0 | 519 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
877211f5 TI |
520 | if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug", |
521 | pstr->proc_root)) != NULL) { | |
1da177e4 | 522 | entry->c.text.read = snd_pcm_xrun_debug_read; |
1da177e4 | 523 | entry->c.text.write = snd_pcm_xrun_debug_write; |
bd7bf042 | 524 | entry->mode |= S_IWUSR; |
1da177e4 LT |
525 | entry->private_data = pstr; |
526 | if (snd_info_register(entry) < 0) { | |
527 | snd_info_free_entry(entry); | |
528 | entry = NULL; | |
529 | } | |
530 | } | |
531 | pstr->proc_xrun_debug_entry = entry; | |
532 | #endif | |
533 | return 0; | |
534 | } | |
535 | ||
877211f5 | 536 | static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) |
1da177e4 | 537 | { |
61fb63c0 | 538 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
746d4a02 TI |
539 | snd_info_free_entry(pstr->proc_xrun_debug_entry); |
540 | pstr->proc_xrun_debug_entry = NULL; | |
1da177e4 | 541 | #endif |
746d4a02 TI |
542 | snd_info_free_entry(pstr->proc_info_entry); |
543 | pstr->proc_info_entry = NULL; | |
544 | snd_info_free_entry(pstr->proc_root); | |
545 | pstr->proc_root = NULL; | |
1da177e4 LT |
546 | return 0; |
547 | } | |
548 | ||
877211f5 | 549 | static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) |
1da177e4 | 550 | { |
877211f5 TI |
551 | struct snd_info_entry *entry; |
552 | struct snd_card *card; | |
1da177e4 LT |
553 | char name[16]; |
554 | ||
555 | card = substream->pcm->card; | |
556 | ||
557 | sprintf(name, "sub%i", substream->number); | |
558 | if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL) | |
559 | return -ENOMEM; | |
560 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
561 | if (snd_info_register(entry) < 0) { | |
562 | snd_info_free_entry(entry); | |
563 | return -ENOMEM; | |
564 | } | |
565 | substream->proc_root = entry; | |
566 | ||
567 | if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) { | |
bf850204 TI |
568 | snd_info_set_text_ops(entry, substream, |
569 | snd_pcm_substream_proc_info_read); | |
1da177e4 LT |
570 | if (snd_info_register(entry) < 0) { |
571 | snd_info_free_entry(entry); | |
572 | entry = NULL; | |
573 | } | |
574 | } | |
575 | substream->proc_info_entry = entry; | |
576 | ||
577 | if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
578 | snd_info_set_text_ops(entry, substream, |
579 | snd_pcm_substream_proc_hw_params_read); | |
1da177e4 LT |
580 | if (snd_info_register(entry) < 0) { |
581 | snd_info_free_entry(entry); | |
582 | entry = NULL; | |
583 | } | |
584 | } | |
585 | substream->proc_hw_params_entry = entry; | |
586 | ||
587 | if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
588 | snd_info_set_text_ops(entry, substream, |
589 | snd_pcm_substream_proc_sw_params_read); | |
1da177e4 LT |
590 | if (snd_info_register(entry) < 0) { |
591 | snd_info_free_entry(entry); | |
592 | entry = NULL; | |
593 | } | |
594 | } | |
595 | substream->proc_sw_params_entry = entry; | |
596 | ||
597 | if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) { | |
bf850204 TI |
598 | snd_info_set_text_ops(entry, substream, |
599 | snd_pcm_substream_proc_status_read); | |
1da177e4 LT |
600 | if (snd_info_register(entry) < 0) { |
601 | snd_info_free_entry(entry); | |
602 | entry = NULL; | |
603 | } | |
604 | } | |
605 | substream->proc_status_entry = entry; | |
606 | ||
607 | return 0; | |
608 | } | |
746d4a02 | 609 | |
877211f5 | 610 | static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) |
1da177e4 | 611 | { |
746d4a02 TI |
612 | snd_info_free_entry(substream->proc_info_entry); |
613 | substream->proc_info_entry = NULL; | |
614 | snd_info_free_entry(substream->proc_hw_params_entry); | |
615 | substream->proc_hw_params_entry = NULL; | |
616 | snd_info_free_entry(substream->proc_sw_params_entry); | |
617 | substream->proc_sw_params_entry = NULL; | |
618 | snd_info_free_entry(substream->proc_status_entry); | |
619 | substream->proc_status_entry = NULL; | |
620 | snd_info_free_entry(substream->proc_root); | |
621 | substream->proc_root = NULL; | |
1da177e4 LT |
622 | return 0; |
623 | } | |
b7d90a35 | 624 | #else /* !CONFIG_SND_VERBOSE_PROCFS */ |
e28563cc TI |
625 | static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; } |
626 | static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; } | |
627 | static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; } | |
628 | static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; } | |
b7d90a35 | 629 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
1da177e4 LT |
630 | |
631 | /** | |
632 | * snd_pcm_new_stream - create a new PCM stream | |
633 | * @pcm: the pcm instance | |
634 | * @stream: the stream direction, SNDRV_PCM_STREAM_XXX | |
635 | * @substream_count: the number of substreams | |
636 | * | |
637 | * Creates a new stream for the pcm. | |
638 | * The corresponding stream on the pcm must have been empty before | |
639 | * calling this, i.e. zero must be given to the argument of | |
640 | * snd_pcm_new(). | |
641 | * | |
eb7c06e8 | 642 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 643 | */ |
877211f5 | 644 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count) |
1da177e4 LT |
645 | { |
646 | int idx, err; | |
877211f5 TI |
647 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
648 | struct snd_pcm_substream *substream, *prev; | |
1da177e4 LT |
649 | |
650 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
1a60d4c5 | 651 | mutex_init(&pstr->oss.setup_mutex); |
1da177e4 LT |
652 | #endif |
653 | pstr->stream = stream; | |
654 | pstr->pcm = pcm; | |
655 | pstr->substream_count = substream_count; | |
945e5038 | 656 | if (substream_count > 0 && !pcm->internal) { |
1da177e4 | 657 | err = snd_pcm_stream_proc_init(pstr); |
73e77ba0 TI |
658 | if (err < 0) { |
659 | snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n"); | |
1da177e4 | 660 | return err; |
73e77ba0 | 661 | } |
1da177e4 LT |
662 | } |
663 | prev = NULL; | |
664 | for (idx = 0, prev = NULL; idx < substream_count; idx++) { | |
ca2c0966 | 665 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 TI |
666 | if (substream == NULL) { |
667 | snd_printk(KERN_ERR "Cannot allocate PCM substream\n"); | |
1da177e4 | 668 | return -ENOMEM; |
73e77ba0 | 669 | } |
1da177e4 LT |
670 | substream->pcm = pcm; |
671 | substream->pstr = pstr; | |
672 | substream->number = idx; | |
673 | substream->stream = stream; | |
674 | sprintf(substream->name, "subdevice #%i", idx); | |
675 | substream->buffer_bytes_max = UINT_MAX; | |
676 | if (prev == NULL) | |
677 | pstr->substream = substream; | |
678 | else | |
679 | prev->next = substream; | |
945e5038 LG |
680 | |
681 | if (!pcm->internal) { | |
682 | err = snd_pcm_substream_proc_init(substream); | |
683 | if (err < 0) { | |
684 | snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n"); | |
685 | if (prev == NULL) | |
686 | pstr->substream = NULL; | |
687 | else | |
688 | prev->next = NULL; | |
689 | kfree(substream); | |
690 | return err; | |
691 | } | |
1da177e4 LT |
692 | } |
693 | substream->group = &substream->self_group; | |
694 | spin_lock_init(&substream->self_group.lock); | |
695 | INIT_LIST_HEAD(&substream->self_group.substreams); | |
696 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
9c323fcb | 697 | atomic_set(&substream->mmap_count, 0); |
1da177e4 LT |
698 | prev = substream; |
699 | } | |
700 | return 0; | |
701 | } | |
702 | ||
e88e8ae6 TI |
703 | EXPORT_SYMBOL(snd_pcm_new_stream); |
704 | ||
945e5038 LG |
705 | static int _snd_pcm_new(struct snd_card *card, const char *id, int device, |
706 | int playback_count, int capture_count, bool internal, | |
707 | struct snd_pcm **rpcm) | |
1da177e4 | 708 | { |
877211f5 | 709 | struct snd_pcm *pcm; |
1da177e4 | 710 | int err; |
877211f5 | 711 | static struct snd_device_ops ops = { |
1da177e4 LT |
712 | .dev_free = snd_pcm_dev_free, |
713 | .dev_register = snd_pcm_dev_register, | |
714 | .dev_disconnect = snd_pcm_dev_disconnect, | |
1da177e4 LT |
715 | }; |
716 | ||
7eaa943c TI |
717 | if (snd_BUG_ON(!card)) |
718 | return -ENXIO; | |
719 | if (rpcm) | |
720 | *rpcm = NULL; | |
ca2c0966 | 721 | pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); |
73e77ba0 TI |
722 | if (pcm == NULL) { |
723 | snd_printk(KERN_ERR "Cannot allocate PCM\n"); | |
1da177e4 | 724 | return -ENOMEM; |
73e77ba0 | 725 | } |
1da177e4 LT |
726 | pcm->card = card; |
727 | pcm->device = device; | |
945e5038 | 728 | pcm->internal = internal; |
73e77ba0 | 729 | if (id) |
1da177e4 | 730 | strlcpy(pcm->id, id, sizeof(pcm->id)); |
1da177e4 LT |
731 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) { |
732 | snd_pcm_free(pcm); | |
733 | return err; | |
734 | } | |
735 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) { | |
736 | snd_pcm_free(pcm); | |
737 | return err; | |
738 | } | |
1a60d4c5 | 739 | mutex_init(&pcm->open_mutex); |
1da177e4 LT |
740 | init_waitqueue_head(&pcm->open_wait); |
741 | if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) { | |
742 | snd_pcm_free(pcm); | |
743 | return err; | |
744 | } | |
7eaa943c TI |
745 | if (rpcm) |
746 | *rpcm = pcm; | |
1da177e4 LT |
747 | return 0; |
748 | } | |
749 | ||
945e5038 LG |
750 | /** |
751 | * snd_pcm_new - create a new PCM instance | |
752 | * @card: the card instance | |
753 | * @id: the id string | |
754 | * @device: the device index (zero based) | |
755 | * @playback_count: the number of substreams for playback | |
756 | * @capture_count: the number of substreams for capture | |
757 | * @rpcm: the pointer to store the new pcm instance | |
758 | * | |
759 | * Creates a new PCM instance. | |
760 | * | |
761 | * The pcm operators have to be set afterwards to the new instance | |
762 | * via snd_pcm_set_ops(). | |
763 | * | |
eb7c06e8 | 764 | * Return: Zero if successful, or a negative error code on failure. |
945e5038 LG |
765 | */ |
766 | int snd_pcm_new(struct snd_card *card, const char *id, int device, | |
767 | int playback_count, int capture_count, struct snd_pcm **rpcm) | |
768 | { | |
769 | return _snd_pcm_new(card, id, device, playback_count, capture_count, | |
770 | false, rpcm); | |
771 | } | |
e88e8ae6 TI |
772 | EXPORT_SYMBOL(snd_pcm_new); |
773 | ||
945e5038 LG |
774 | /** |
775 | * snd_pcm_new_internal - create a new internal PCM instance | |
776 | * @card: the card instance | |
777 | * @id: the id string | |
778 | * @device: the device index (zero based - shared with normal PCMs) | |
779 | * @playback_count: the number of substreams for playback | |
780 | * @capture_count: the number of substreams for capture | |
781 | * @rpcm: the pointer to store the new pcm instance | |
782 | * | |
783 | * Creates a new internal PCM instance with no userspace device or procfs | |
784 | * entries. This is used by ASoC Back End PCMs in order to create a PCM that | |
785 | * will only be used internally by kernel drivers. i.e. it cannot be opened | |
786 | * by userspace. It provides existing ASoC components drivers with a substream | |
787 | * and access to any private data. | |
788 | * | |
789 | * The pcm operators have to be set afterwards to the new instance | |
790 | * via snd_pcm_set_ops(). | |
791 | * | |
eb7c06e8 | 792 | * Return: Zero if successful, or a negative error code on failure. |
945e5038 LG |
793 | */ |
794 | int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, | |
795 | int playback_count, int capture_count, | |
796 | struct snd_pcm **rpcm) | |
797 | { | |
798 | return _snd_pcm_new(card, id, device, playback_count, capture_count, | |
799 | true, rpcm); | |
800 | } | |
801 | EXPORT_SYMBOL(snd_pcm_new_internal); | |
802 | ||
877211f5 | 803 | static void snd_pcm_free_stream(struct snd_pcm_str * pstr) |
1da177e4 | 804 | { |
877211f5 | 805 | struct snd_pcm_substream *substream, *substream_next; |
1da177e4 | 806 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
877211f5 | 807 | struct snd_pcm_oss_setup *setup, *setupn; |
1da177e4 LT |
808 | #endif |
809 | substream = pstr->substream; | |
810 | while (substream) { | |
811 | substream_next = substream->next; | |
c461482c | 812 | snd_pcm_timer_done(substream); |
1da177e4 LT |
813 | snd_pcm_substream_proc_done(substream); |
814 | kfree(substream); | |
815 | substream = substream_next; | |
816 | } | |
817 | snd_pcm_stream_proc_done(pstr); | |
818 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
819 | for (setup = pstr->oss.setup_list; setup; setup = setupn) { | |
820 | setupn = setup->next; | |
821 | kfree(setup->task_name); | |
822 | kfree(setup); | |
823 | } | |
824 | #endif | |
825 | } | |
826 | ||
877211f5 | 827 | static int snd_pcm_free(struct snd_pcm *pcm) |
1da177e4 | 828 | { |
c461482c TI |
829 | struct snd_pcm_notify *notify; |
830 | ||
7eaa943c TI |
831 | if (!pcm) |
832 | return 0; | |
c461482c TI |
833 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
834 | notify->n_unregister(pcm); | |
835 | } | |
1da177e4 LT |
836 | if (pcm->private_free) |
837 | pcm->private_free(pcm); | |
838 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
839 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]); | |
840 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]); | |
841 | kfree(pcm); | |
842 | return 0; | |
843 | } | |
844 | ||
877211f5 | 845 | static int snd_pcm_dev_free(struct snd_device *device) |
1da177e4 | 846 | { |
877211f5 | 847 | struct snd_pcm *pcm = device->device_data; |
1da177e4 LT |
848 | return snd_pcm_free(pcm); |
849 | } | |
850 | ||
3bf75f9b TI |
851 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, |
852 | struct file *file, | |
853 | struct snd_pcm_substream **rsubstream) | |
1da177e4 | 854 | { |
877211f5 TI |
855 | struct snd_pcm_str * pstr; |
856 | struct snd_pcm_substream *substream; | |
857 | struct snd_pcm_runtime *runtime; | |
858 | struct snd_ctl_file *kctl; | |
859 | struct snd_card *card; | |
1da177e4 LT |
860 | int prefer_subdevice = -1; |
861 | size_t size; | |
862 | ||
7eaa943c TI |
863 | if (snd_BUG_ON(!pcm || !rsubstream)) |
864 | return -ENXIO; | |
1da177e4 | 865 | *rsubstream = NULL; |
1da177e4 | 866 | pstr = &pcm->streams[stream]; |
3bf75f9b | 867 | if (pstr->substream == NULL || pstr->substream_count == 0) |
1da177e4 LT |
868 | return -ENODEV; |
869 | ||
870 | card = pcm->card; | |
399ccdc1 | 871 | read_lock(&card->ctl_files_rwlock); |
9244b2c3 | 872 | list_for_each_entry(kctl, &card->ctl_files, list) { |
25d27ede | 873 | if (kctl->pid == task_pid(current)) { |
1da177e4 | 874 | prefer_subdevice = kctl->prefer_pcm_subdevice; |
2529bba7 TI |
875 | if (prefer_subdevice != -1) |
876 | break; | |
1da177e4 LT |
877 | } |
878 | } | |
399ccdc1 | 879 | read_unlock(&card->ctl_files_rwlock); |
1da177e4 | 880 | |
1da177e4 LT |
881 | switch (stream) { |
882 | case SNDRV_PCM_STREAM_PLAYBACK: | |
883 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
884 | for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; substream; substream = substream->next) { | |
885 | if (SUBSTREAM_BUSY(substream)) | |
886 | return -EAGAIN; | |
887 | } | |
888 | } | |
889 | break; | |
890 | case SNDRV_PCM_STREAM_CAPTURE: | |
891 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
892 | for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next) { | |
893 | if (SUBSTREAM_BUSY(substream)) | |
894 | return -EAGAIN; | |
895 | } | |
896 | } | |
897 | break; | |
898 | default: | |
899 | return -EINVAL; | |
900 | } | |
901 | ||
0df63e44 TI |
902 | if (file->f_flags & O_APPEND) { |
903 | if (prefer_subdevice < 0) { | |
904 | if (pstr->substream_count > 1) | |
905 | return -EINVAL; /* must be unique */ | |
906 | substream = pstr->substream; | |
907 | } else { | |
908 | for (substream = pstr->substream; substream; | |
909 | substream = substream->next) | |
910 | if (substream->number == prefer_subdevice) | |
911 | break; | |
912 | } | |
913 | if (! substream) | |
914 | return -ENODEV; | |
915 | if (! SUBSTREAM_BUSY(substream)) | |
916 | return -EBADFD; | |
917 | substream->ref_count++; | |
918 | *rsubstream = substream; | |
919 | return 0; | |
920 | } | |
921 | ||
1da177e4 LT |
922 | if (prefer_subdevice >= 0) { |
923 | for (substream = pstr->substream; substream; substream = substream->next) | |
924 | if (!SUBSTREAM_BUSY(substream) && substream->number == prefer_subdevice) | |
925 | goto __ok; | |
926 | } | |
927 | for (substream = pstr->substream; substream; substream = substream->next) | |
928 | if (!SUBSTREAM_BUSY(substream)) | |
929 | break; | |
930 | __ok: | |
931 | if (substream == NULL) | |
932 | return -EAGAIN; | |
933 | ||
ca2c0966 | 934 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
1da177e4 LT |
935 | if (runtime == NULL) |
936 | return -ENOMEM; | |
937 | ||
877211f5 | 938 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)); |
1da177e4 LT |
939 | runtime->status = snd_malloc_pages(size, GFP_KERNEL); |
940 | if (runtime->status == NULL) { | |
941 | kfree(runtime); | |
942 | return -ENOMEM; | |
943 | } | |
944 | memset((void*)runtime->status, 0, size); | |
945 | ||
877211f5 | 946 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)); |
1da177e4 LT |
947 | runtime->control = snd_malloc_pages(size, GFP_KERNEL); |
948 | if (runtime->control == NULL) { | |
877211f5 TI |
949 | snd_free_pages((void*)runtime->status, |
950 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
1da177e4 LT |
951 | kfree(runtime); |
952 | return -ENOMEM; | |
953 | } | |
954 | memset((void*)runtime->control, 0, size); | |
955 | ||
956 | init_waitqueue_head(&runtime->sleep); | |
c91a988d | 957 | init_waitqueue_head(&runtime->tsleep); |
1da177e4 LT |
958 | |
959 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
960 | ||
961 | substream->runtime = runtime; | |
962 | substream->private_data = pcm->private_data; | |
0df63e44 TI |
963 | substream->ref_count = 1; |
964 | substream->f_flags = file->f_flags; | |
e7373b70 | 965 | substream->pid = get_pid(task_pid(current)); |
1da177e4 LT |
966 | pstr->substream_opened++; |
967 | *rsubstream = substream; | |
968 | return 0; | |
969 | } | |
970 | ||
3bf75f9b | 971 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream) |
1da177e4 | 972 | { |
877211f5 | 973 | struct snd_pcm_runtime *runtime; |
0df63e44 | 974 | |
7eaa943c TI |
975 | if (PCM_RUNTIME_CHECK(substream)) |
976 | return; | |
1da177e4 | 977 | runtime = substream->runtime; |
1da177e4 LT |
978 | if (runtime->private_free != NULL) |
979 | runtime->private_free(runtime); | |
877211f5 TI |
980 | snd_free_pages((void*)runtime->status, |
981 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
982 | snd_free_pages((void*)runtime->control, | |
983 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))); | |
1da177e4 | 984 | kfree(runtime->hw_constraints.rules); |
4d96eb25 | 985 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
51d503de | 986 | kfree(runtime->hwptr_log); |
4d96eb25 | 987 | #endif |
1da177e4 LT |
988 | kfree(runtime); |
989 | substream->runtime = NULL; | |
e7373b70 CL |
990 | put_pid(substream->pid); |
991 | substream->pid = NULL; | |
1da177e4 LT |
992 | substream->pstr->substream_opened--; |
993 | } | |
994 | ||
d80f19fa GKH |
995 | static ssize_t show_pcm_class(struct device *dev, |
996 | struct device_attribute *attr, char *buf) | |
9d19f48c TI |
997 | { |
998 | struct snd_pcm *pcm; | |
999 | const char *str; | |
1000 | static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = { | |
1001 | [SNDRV_PCM_CLASS_GENERIC] = "generic", | |
1002 | [SNDRV_PCM_CLASS_MULTI] = "multi", | |
1003 | [SNDRV_PCM_CLASS_MODEM] = "modem", | |
1004 | [SNDRV_PCM_CLASS_DIGITIZER] = "digitizer", | |
1005 | }; | |
1006 | ||
d80f19fa | 1007 | if (! (pcm = dev_get_drvdata(dev)) || |
9d19f48c TI |
1008 | pcm->dev_class > SNDRV_PCM_CLASS_LAST) |
1009 | str = "none"; | |
1010 | else | |
1011 | str = strs[pcm->dev_class]; | |
1012 | return snprintf(buf, PAGE_SIZE, "%s\n", str); | |
1013 | } | |
1014 | ||
d80f19fa | 1015 | static struct device_attribute pcm_attrs = |
9d19f48c TI |
1016 | __ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL); |
1017 | ||
877211f5 | 1018 | static int snd_pcm_dev_register(struct snd_device *device) |
1da177e4 | 1019 | { |
f87135f5 | 1020 | int cidx, err; |
877211f5 | 1021 | struct snd_pcm_substream *substream; |
9244b2c3 | 1022 | struct snd_pcm_notify *notify; |
1da177e4 | 1023 | char str[16]; |
4b3be6af | 1024 | struct snd_pcm *pcm; |
c78085fc | 1025 | struct device *dev; |
1da177e4 | 1026 | |
4b3be6af | 1027 | if (snd_BUG_ON(!device || !device->device_data)) |
7eaa943c | 1028 | return -ENXIO; |
4b3be6af | 1029 | pcm = device->device_data; |
1a60d4c5 | 1030 | mutex_lock(®ister_mutex); |
f90c06a2 PM |
1031 | err = snd_pcm_add(pcm); |
1032 | if (err) { | |
1a60d4c5 | 1033 | mutex_unlock(®ister_mutex); |
f90c06a2 | 1034 | return err; |
1da177e4 | 1035 | } |
1da177e4 LT |
1036 | for (cidx = 0; cidx < 2; cidx++) { |
1037 | int devtype = -1; | |
945e5038 | 1038 | if (pcm->streams[cidx].substream == NULL || pcm->internal) |
1da177e4 LT |
1039 | continue; |
1040 | switch (cidx) { | |
1041 | case SNDRV_PCM_STREAM_PLAYBACK: | |
1042 | sprintf(str, "pcmC%iD%ip", pcm->card->number, pcm->device); | |
1da177e4 LT |
1043 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
1044 | break; | |
1045 | case SNDRV_PCM_STREAM_CAPTURE: | |
1046 | sprintf(str, "pcmC%iD%ic", pcm->card->number, pcm->device); | |
1da177e4 LT |
1047 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
1048 | break; | |
1049 | } | |
c78085fc JB |
1050 | /* device pointer to use, pcm->dev takes precedence if |
1051 | * it is assigned, otherwise fall back to card's device | |
1052 | * if possible */ | |
1053 | dev = pcm->dev; | |
1054 | if (!dev) | |
c2902c8a | 1055 | dev = snd_card_get_device_link(pcm->card); |
c78085fc JB |
1056 | /* register pcm */ |
1057 | err = snd_register_device_for_dev(devtype, pcm->card, | |
1058 | pcm->device, | |
1059 | &snd_pcm_f_ops[cidx], | |
1060 | pcm, str, dev); | |
1061 | if (err < 0) { | |
f87135f5 | 1062 | list_del(&pcm->list); |
1a60d4c5 | 1063 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1064 | return err; |
1065 | } | |
9d19f48c TI |
1066 | snd_add_device_sysfs_file(devtype, pcm->card, pcm->device, |
1067 | &pcm_attrs); | |
1da177e4 LT |
1068 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
1069 | snd_pcm_timer_init(substream); | |
1070 | } | |
9244b2c3 JB |
1071 | |
1072 | list_for_each_entry(notify, &snd_pcm_notify_list, list) | |
1da177e4 | 1073 | notify->n_register(pcm); |
9244b2c3 | 1074 | |
1a60d4c5 | 1075 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1076 | return 0; |
1077 | } | |
1078 | ||
877211f5 | 1079 | static int snd_pcm_dev_disconnect(struct snd_device *device) |
1da177e4 | 1080 | { |
877211f5 | 1081 | struct snd_pcm *pcm = device->device_data; |
c461482c | 1082 | struct snd_pcm_notify *notify; |
877211f5 | 1083 | struct snd_pcm_substream *substream; |
c461482c | 1084 | int cidx, devtype; |
1da177e4 | 1085 | |
1a60d4c5 | 1086 | mutex_lock(®ister_mutex); |
c461482c TI |
1087 | if (list_empty(&pcm->list)) |
1088 | goto unlock; | |
1089 | ||
9b0573c0 | 1090 | mutex_lock(&pcm->open_mutex); |
0914f796 | 1091 | wake_up(&pcm->open_wait); |
f87135f5 | 1092 | list_del_init(&pcm->list); |
1da177e4 | 1093 | for (cidx = 0; cidx < 2; cidx++) |
9b0573c0 TI |
1094 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) { |
1095 | snd_pcm_stream_lock_irq(substream); | |
0914f796 | 1096 | if (substream->runtime) { |
1da177e4 | 1097 | substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED; |
0914f796 TI |
1098 | wake_up(&substream->runtime->sleep); |
1099 | wake_up(&substream->runtime->tsleep); | |
1100 | } | |
9b0573c0 TI |
1101 | snd_pcm_stream_unlock_irq(substream); |
1102 | } | |
c461482c | 1103 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
1da177e4 LT |
1104 | notify->n_disconnect(pcm); |
1105 | } | |
1da177e4 LT |
1106 | for (cidx = 0; cidx < 2; cidx++) { |
1107 | devtype = -1; | |
1108 | switch (cidx) { | |
1109 | case SNDRV_PCM_STREAM_PLAYBACK: | |
1110 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; | |
1111 | break; | |
1112 | case SNDRV_PCM_STREAM_CAPTURE: | |
1113 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; | |
1114 | break; | |
1115 | } | |
1116 | snd_unregister_device(devtype, pcm->card, pcm->device); | |
2d3391ec TI |
1117 | if (pcm->streams[cidx].chmap_kctl) { |
1118 | snd_ctl_remove(pcm->card, pcm->streams[cidx].chmap_kctl); | |
1119 | pcm->streams[cidx].chmap_kctl = NULL; | |
1120 | } | |
1da177e4 | 1121 | } |
9b0573c0 | 1122 | mutex_unlock(&pcm->open_mutex); |
c461482c | 1123 | unlock: |
1a60d4c5 | 1124 | mutex_unlock(®ister_mutex); |
c461482c | 1125 | return 0; |
1da177e4 LT |
1126 | } |
1127 | ||
877211f5 | 1128 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree) |
1da177e4 | 1129 | { |
9244b2c3 | 1130 | struct snd_pcm *pcm; |
1da177e4 | 1131 | |
7eaa943c TI |
1132 | if (snd_BUG_ON(!notify || |
1133 | !notify->n_register || | |
1134 | !notify->n_unregister || | |
1135 | !notify->n_disconnect)) | |
1136 | return -EINVAL; | |
1a60d4c5 | 1137 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1138 | if (nfree) { |
1139 | list_del(¬ify->list); | |
9244b2c3 JB |
1140 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1141 | notify->n_unregister(pcm); | |
1da177e4 LT |
1142 | } else { |
1143 | list_add_tail(¬ify->list, &snd_pcm_notify_list); | |
9244b2c3 JB |
1144 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1145 | notify->n_register(pcm); | |
1da177e4 | 1146 | } |
1a60d4c5 | 1147 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1148 | return 0; |
1149 | } | |
1150 | ||
e88e8ae6 TI |
1151 | EXPORT_SYMBOL(snd_pcm_notify); |
1152 | ||
e28563cc | 1153 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1154 | /* |
1155 | * Info interface | |
1156 | */ | |
1157 | ||
877211f5 TI |
1158 | static void snd_pcm_proc_read(struct snd_info_entry *entry, |
1159 | struct snd_info_buffer *buffer) | |
1da177e4 | 1160 | { |
877211f5 | 1161 | struct snd_pcm *pcm; |
1da177e4 | 1162 | |
1a60d4c5 | 1163 | mutex_lock(®ister_mutex); |
9244b2c3 | 1164 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
f87135f5 CL |
1165 | snd_iprintf(buffer, "%02i-%02i: %s : %s", |
1166 | pcm->card->number, pcm->device, pcm->id, pcm->name); | |
1da177e4 | 1167 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) |
877211f5 TI |
1168 | snd_iprintf(buffer, " : playback %i", |
1169 | pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count); | |
1da177e4 | 1170 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) |
877211f5 TI |
1171 | snd_iprintf(buffer, " : capture %i", |
1172 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); | |
1da177e4 LT |
1173 | snd_iprintf(buffer, "\n"); |
1174 | } | |
1a60d4c5 | 1175 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1176 | } |
1177 | ||
6581f4e7 | 1178 | static struct snd_info_entry *snd_pcm_proc_entry; |
1da177e4 | 1179 | |
e28563cc | 1180 | static void snd_pcm_proc_init(void) |
1da177e4 | 1181 | { |
877211f5 | 1182 | struct snd_info_entry *entry; |
1da177e4 | 1183 | |
1da177e4 | 1184 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) { |
bf850204 | 1185 | snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read); |
1da177e4 LT |
1186 | if (snd_info_register(entry) < 0) { |
1187 | snd_info_free_entry(entry); | |
1188 | entry = NULL; | |
1189 | } | |
1190 | } | |
1191 | snd_pcm_proc_entry = entry; | |
e28563cc TI |
1192 | } |
1193 | ||
1194 | static void snd_pcm_proc_done(void) | |
1195 | { | |
746d4a02 | 1196 | snd_info_free_entry(snd_pcm_proc_entry); |
e28563cc TI |
1197 | } |
1198 | ||
1199 | #else /* !CONFIG_PROC_FS */ | |
1200 | #define snd_pcm_proc_init() | |
1201 | #define snd_pcm_proc_done() | |
1202 | #endif /* CONFIG_PROC_FS */ | |
1203 | ||
1204 | ||
1205 | /* | |
1206 | * ENTRY functions | |
1207 | */ | |
1208 | ||
1209 | static int __init alsa_pcm_init(void) | |
1210 | { | |
1211 | snd_ctl_register_ioctl(snd_pcm_control_ioctl); | |
1212 | snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl); | |
1213 | snd_pcm_proc_init(); | |
1da177e4 LT |
1214 | return 0; |
1215 | } | |
1216 | ||
1217 | static void __exit alsa_pcm_exit(void) | |
1218 | { | |
1219 | snd_ctl_unregister_ioctl(snd_pcm_control_ioctl); | |
1220 | snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl); | |
e28563cc | 1221 | snd_pcm_proc_done(); |
1da177e4 LT |
1222 | } |
1223 | ||
1224 | module_init(alsa_pcm_init) | |
1225 | module_exit(alsa_pcm_exit) |