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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Digital Audio (PCM) abstract layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
1da177e4 LT |
22 | #include <linux/init.h> |
23 | #include <linux/slab.h> | |
24 | #include <linux/time.h> | |
1a60d4c5 | 25 | #include <linux/mutex.h> |
1da177e4 LT |
26 | #include <sound/core.h> |
27 | #include <sound/minors.h> | |
28 | #include <sound/pcm.h> | |
29 | #include <sound/control.h> | |
30 | #include <sound/info.h> | |
31 | ||
c1017a4c | 32 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); |
1da177e4 LT |
33 | MODULE_DESCRIPTION("Midlevel PCM code for ALSA."); |
34 | MODULE_LICENSE("GPL"); | |
35 | ||
f87135f5 | 36 | static LIST_HEAD(snd_pcm_devices); |
1da177e4 | 37 | static LIST_HEAD(snd_pcm_notify_list); |
1a60d4c5 | 38 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 39 | |
877211f5 TI |
40 | static int snd_pcm_free(struct snd_pcm *pcm); |
41 | static int snd_pcm_dev_free(struct snd_device *device); | |
42 | static int snd_pcm_dev_register(struct snd_device *device); | |
43 | static int snd_pcm_dev_disconnect(struct snd_device *device); | |
1da177e4 | 44 | |
f90c06a2 | 45 | static struct snd_pcm *snd_pcm_get(struct snd_card *card, int device) |
f87135f5 | 46 | { |
f87135f5 CL |
47 | struct snd_pcm *pcm; |
48 | ||
9244b2c3 | 49 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
f87135f5 CL |
50 | if (pcm->card == card && pcm->device == device) |
51 | return pcm; | |
52 | } | |
53 | return NULL; | |
54 | } | |
55 | ||
f90c06a2 PM |
56 | static int snd_pcm_next(struct snd_card *card, int device) |
57 | { | |
58 | struct snd_pcm *pcm; | |
59 | ||
60 | list_for_each_entry(pcm, &snd_pcm_devices, list) { | |
61 | if (pcm->card == card && pcm->device > device) | |
62 | return pcm->device; | |
63 | else if (pcm->card->number > card->number) | |
64 | return -1; | |
65 | } | |
66 | return -1; | |
67 | } | |
68 | ||
69 | static int snd_pcm_add(struct snd_pcm *newpcm) | |
70 | { | |
71 | struct snd_pcm *pcm; | |
72 | ||
73 | list_for_each_entry(pcm, &snd_pcm_devices, list) { | |
74 | if (pcm->card == newpcm->card && pcm->device == newpcm->device) | |
75 | return -EBUSY; | |
76 | if (pcm->card->number > newpcm->card->number || | |
77 | (pcm->card == newpcm->card && | |
78 | pcm->device > newpcm->device)) { | |
79 | list_add(&newpcm->list, pcm->list.prev); | |
80 | return 0; | |
81 | } | |
82 | } | |
83 | list_add_tail(&newpcm->list, &snd_pcm_devices); | |
84 | return 0; | |
85 | } | |
86 | ||
877211f5 TI |
87 | static int snd_pcm_control_ioctl(struct snd_card *card, |
88 | struct snd_ctl_file *control, | |
1da177e4 LT |
89 | unsigned int cmd, unsigned long arg) |
90 | { | |
1da177e4 LT |
91 | switch (cmd) { |
92 | case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE: | |
93 | { | |
94 | int device; | |
95 | ||
96 | if (get_user(device, (int __user *)arg)) | |
97 | return -EFAULT; | |
1a60d4c5 | 98 | mutex_lock(®ister_mutex); |
f90c06a2 | 99 | device = snd_pcm_next(card, device); |
1a60d4c5 | 100 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
101 | if (put_user(device, (int __user *)arg)) |
102 | return -EFAULT; | |
103 | return 0; | |
104 | } | |
105 | case SNDRV_CTL_IOCTL_PCM_INFO: | |
106 | { | |
877211f5 | 107 | struct snd_pcm_info __user *info; |
1da177e4 | 108 | unsigned int device, subdevice; |
877211f5 TI |
109 | int stream; |
110 | struct snd_pcm *pcm; | |
111 | struct snd_pcm_str *pstr; | |
112 | struct snd_pcm_substream *substream; | |
f87135f5 CL |
113 | int err; |
114 | ||
877211f5 | 115 | info = (struct snd_pcm_info __user *)arg; |
1da177e4 LT |
116 | if (get_user(device, &info->device)) |
117 | return -EFAULT; | |
1da177e4 LT |
118 | if (get_user(stream, &info->stream)) |
119 | return -EFAULT; | |
120 | if (stream < 0 || stream > 1) | |
121 | return -EINVAL; | |
1da177e4 LT |
122 | if (get_user(subdevice, &info->subdevice)) |
123 | return -EFAULT; | |
1a60d4c5 | 124 | mutex_lock(®ister_mutex); |
f90c06a2 | 125 | pcm = snd_pcm_get(card, device); |
f87135f5 CL |
126 | if (pcm == NULL) { |
127 | err = -ENXIO; | |
128 | goto _error; | |
129 | } | |
130 | pstr = &pcm->streams[stream]; | |
131 | if (pstr->substream_count == 0) { | |
132 | err = -ENOENT; | |
133 | goto _error; | |
134 | } | |
135 | if (subdevice >= pstr->substream_count) { | |
136 | err = -ENXIO; | |
137 | goto _error; | |
138 | } | |
139 | for (substream = pstr->substream; substream; | |
140 | substream = substream->next) | |
1da177e4 LT |
141 | if (substream->number == (int)subdevice) |
142 | break; | |
f87135f5 CL |
143 | if (substream == NULL) { |
144 | err = -ENXIO; | |
145 | goto _error; | |
146 | } | |
147 | err = snd_pcm_info_user(substream, info); | |
148 | _error: | |
1a60d4c5 | 149 | mutex_unlock(®ister_mutex); |
f87135f5 | 150 | return err; |
1da177e4 LT |
151 | } |
152 | case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE: | |
153 | { | |
154 | int val; | |
155 | ||
156 | if (get_user(val, (int __user *)arg)) | |
157 | return -EFAULT; | |
158 | control->prefer_pcm_subdevice = val; | |
159 | return 0; | |
160 | } | |
161 | } | |
162 | return -ENOIOCTLCMD; | |
163 | } | |
21a3479a | 164 | |
1da177e4 | 165 | #define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v |
1da177e4 | 166 | |
1da177e4 LT |
167 | static char *snd_pcm_format_names[] = { |
168 | FORMAT(S8), | |
169 | FORMAT(U8), | |
170 | FORMAT(S16_LE), | |
171 | FORMAT(S16_BE), | |
172 | FORMAT(U16_LE), | |
173 | FORMAT(U16_BE), | |
174 | FORMAT(S24_LE), | |
175 | FORMAT(S24_BE), | |
176 | FORMAT(U24_LE), | |
177 | FORMAT(U24_BE), | |
178 | FORMAT(S32_LE), | |
179 | FORMAT(S32_BE), | |
180 | FORMAT(U32_LE), | |
181 | FORMAT(U32_BE), | |
182 | FORMAT(FLOAT_LE), | |
183 | FORMAT(FLOAT_BE), | |
184 | FORMAT(FLOAT64_LE), | |
185 | FORMAT(FLOAT64_BE), | |
186 | FORMAT(IEC958_SUBFRAME_LE), | |
187 | FORMAT(IEC958_SUBFRAME_BE), | |
188 | FORMAT(MU_LAW), | |
189 | FORMAT(A_LAW), | |
190 | FORMAT(IMA_ADPCM), | |
191 | FORMAT(MPEG), | |
192 | FORMAT(GSM), | |
193 | FORMAT(SPECIAL), | |
194 | FORMAT(S24_3LE), | |
195 | FORMAT(S24_3BE), | |
196 | FORMAT(U24_3LE), | |
197 | FORMAT(U24_3BE), | |
198 | FORMAT(S20_3LE), | |
199 | FORMAT(S20_3BE), | |
200 | FORMAT(U20_3LE), | |
201 | FORMAT(U20_3BE), | |
202 | FORMAT(S18_3LE), | |
203 | FORMAT(S18_3BE), | |
204 | FORMAT(U18_3LE), | |
205 | FORMAT(U18_3BE), | |
7a28826a DC |
206 | FORMAT(G723_24), |
207 | FORMAT(G723_24_1B), | |
208 | FORMAT(G723_40), | |
209 | FORMAT(G723_40_1B), | |
1da177e4 LT |
210 | }; |
211 | ||
6e5265ec | 212 | const char *snd_pcm_format_name(snd_pcm_format_t format) |
e28563cc | 213 | { |
7a28826a DC |
214 | if (format >= ARRAY_SIZE(snd_pcm_format_names)) |
215 | return "Unknown"; | |
e28563cc TI |
216 | return snd_pcm_format_names[format]; |
217 | } | |
6e5265ec TI |
218 | EXPORT_SYMBOL_GPL(snd_pcm_format_name); |
219 | ||
220 | #ifdef CONFIG_SND_VERBOSE_PROCFS | |
221 | ||
222 | #define STATE(v) [SNDRV_PCM_STATE_##v] = #v | |
223 | #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v | |
224 | #define READY(v) [SNDRV_PCM_READY_##v] = #v | |
225 | #define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v | |
226 | #define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v | |
227 | #define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v | |
228 | #define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v | |
229 | #define START(v) [SNDRV_PCM_START_##v] = #v | |
230 | #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v | |
e28563cc | 231 | |
e28563cc TI |
232 | static char *snd_pcm_stream_names[] = { |
233 | STREAM(PLAYBACK), | |
234 | STREAM(CAPTURE), | |
235 | }; | |
236 | ||
237 | static char *snd_pcm_state_names[] = { | |
238 | STATE(OPEN), | |
239 | STATE(SETUP), | |
240 | STATE(PREPARED), | |
241 | STATE(RUNNING), | |
242 | STATE(XRUN), | |
243 | STATE(DRAINING), | |
244 | STATE(PAUSED), | |
245 | STATE(SUSPENDED), | |
246 | }; | |
247 | ||
248 | static char *snd_pcm_access_names[] = { | |
249 | ACCESS(MMAP_INTERLEAVED), | |
250 | ACCESS(MMAP_NONINTERLEAVED), | |
251 | ACCESS(MMAP_COMPLEX), | |
252 | ACCESS(RW_INTERLEAVED), | |
253 | ACCESS(RW_NONINTERLEAVED), | |
254 | }; | |
255 | ||
1da177e4 LT |
256 | static char *snd_pcm_subformat_names[] = { |
257 | SUBFORMAT(STD), | |
258 | }; | |
259 | ||
260 | static char *snd_pcm_tstamp_mode_names[] = { | |
261 | TSTAMP(NONE), | |
8c121586 | 262 | TSTAMP(ENABLE), |
1da177e4 LT |
263 | }; |
264 | ||
877211f5 | 265 | static const char *snd_pcm_stream_name(int stream) |
1da177e4 | 266 | { |
1da177e4 LT |
267 | return snd_pcm_stream_names[stream]; |
268 | } | |
269 | ||
270 | static const char *snd_pcm_access_name(snd_pcm_access_t access) | |
271 | { | |
1da177e4 LT |
272 | return snd_pcm_access_names[access]; |
273 | } | |
274 | ||
1da177e4 LT |
275 | static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat) |
276 | { | |
1da177e4 LT |
277 | return snd_pcm_subformat_names[subformat]; |
278 | } | |
279 | ||
877211f5 | 280 | static const char *snd_pcm_tstamp_mode_name(int mode) |
1da177e4 | 281 | { |
1da177e4 LT |
282 | return snd_pcm_tstamp_mode_names[mode]; |
283 | } | |
284 | ||
285 | static const char *snd_pcm_state_name(snd_pcm_state_t state) | |
286 | { | |
1da177e4 LT |
287 | return snd_pcm_state_names[state]; |
288 | } | |
289 | ||
290 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
291 | #include <linux/soundcard.h> | |
1a60d4c5 | 292 | |
1da177e4 LT |
293 | static const char *snd_pcm_oss_format_name(int format) |
294 | { | |
295 | switch (format) { | |
296 | case AFMT_MU_LAW: | |
297 | return "MU_LAW"; | |
298 | case AFMT_A_LAW: | |
299 | return "A_LAW"; | |
300 | case AFMT_IMA_ADPCM: | |
301 | return "IMA_ADPCM"; | |
302 | case AFMT_U8: | |
303 | return "U8"; | |
304 | case AFMT_S16_LE: | |
305 | return "S16_LE"; | |
306 | case AFMT_S16_BE: | |
307 | return "S16_BE"; | |
308 | case AFMT_S8: | |
309 | return "S8"; | |
310 | case AFMT_U16_LE: | |
311 | return "U16_LE"; | |
312 | case AFMT_U16_BE: | |
313 | return "U16_BE"; | |
314 | case AFMT_MPEG: | |
315 | return "MPEG"; | |
316 | default: | |
317 | return "unknown"; | |
318 | } | |
319 | } | |
320 | #endif | |
321 | ||
877211f5 TI |
322 | static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, |
323 | struct snd_info_buffer *buffer) | |
1da177e4 | 324 | { |
877211f5 | 325 | struct snd_pcm_info *info; |
1da177e4 LT |
326 | int err; |
327 | ||
7c22f1aa TI |
328 | if (! substream) |
329 | return; | |
1da177e4 LT |
330 | |
331 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
332 | if (! info) { | |
333 | printk(KERN_DEBUG "snd_pcm_proc_info_read: cannot malloc\n"); | |
334 | return; | |
335 | } | |
336 | ||
337 | err = snd_pcm_info(substream, info); | |
338 | if (err < 0) { | |
339 | snd_iprintf(buffer, "error %d\n", err); | |
340 | kfree(info); | |
341 | return; | |
342 | } | |
343 | snd_iprintf(buffer, "card: %d\n", info->card); | |
344 | snd_iprintf(buffer, "device: %d\n", info->device); | |
345 | snd_iprintf(buffer, "subdevice: %d\n", info->subdevice); | |
346 | snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream)); | |
347 | snd_iprintf(buffer, "id: %s\n", info->id); | |
348 | snd_iprintf(buffer, "name: %s\n", info->name); | |
349 | snd_iprintf(buffer, "subname: %s\n", info->subname); | |
350 | snd_iprintf(buffer, "class: %d\n", info->dev_class); | |
351 | snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); | |
352 | snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); | |
353 | snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); | |
354 | kfree(info); | |
355 | } | |
356 | ||
877211f5 TI |
357 | static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry, |
358 | struct snd_info_buffer *buffer) | |
1da177e4 | 359 | { |
877211f5 TI |
360 | snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream, |
361 | buffer); | |
1da177e4 LT |
362 | } |
363 | ||
877211f5 TI |
364 | static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry, |
365 | struct snd_info_buffer *buffer) | |
1da177e4 | 366 | { |
9fe856e4 | 367 | snd_pcm_proc_info_read(entry->private_data, buffer); |
1da177e4 LT |
368 | } |
369 | ||
877211f5 TI |
370 | static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry, |
371 | struct snd_info_buffer *buffer) | |
1da177e4 | 372 | { |
877211f5 TI |
373 | struct snd_pcm_substream *substream = entry->private_data; |
374 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
375 | if (!runtime) { |
376 | snd_iprintf(buffer, "closed\n"); | |
377 | return; | |
378 | } | |
1da177e4 LT |
379 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
380 | snd_iprintf(buffer, "no setup\n"); | |
1da177e4 LT |
381 | return; |
382 | } | |
383 | snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); | |
384 | snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); | |
385 | snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat)); | |
386 | snd_iprintf(buffer, "channels: %u\n", runtime->channels); | |
387 | snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den); | |
388 | snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size); | |
389 | snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size); | |
1da177e4 LT |
390 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
391 | if (substream->oss.oss) { | |
392 | snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format)); | |
393 | snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels); | |
394 | snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate); | |
395 | snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes); | |
396 | snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods); | |
397 | snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); | |
398 | } | |
399 | #endif | |
1da177e4 LT |
400 | } |
401 | ||
877211f5 TI |
402 | static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, |
403 | struct snd_info_buffer *buffer) | |
1da177e4 | 404 | { |
877211f5 TI |
405 | struct snd_pcm_substream *substream = entry->private_data; |
406 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
407 | if (!runtime) { |
408 | snd_iprintf(buffer, "closed\n"); | |
409 | return; | |
410 | } | |
1da177e4 LT |
411 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
412 | snd_iprintf(buffer, "no setup\n"); | |
1da177e4 LT |
413 | return; |
414 | } | |
415 | snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); | |
416 | snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); | |
1da177e4 | 417 | snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min); |
1da177e4 LT |
418 | snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold); |
419 | snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold); | |
420 | snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); | |
421 | snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); | |
422 | snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); | |
1da177e4 LT |
423 | } |
424 | ||
877211f5 TI |
425 | static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, |
426 | struct snd_info_buffer *buffer) | |
1da177e4 | 427 | { |
877211f5 TI |
428 | struct snd_pcm_substream *substream = entry->private_data; |
429 | struct snd_pcm_runtime *runtime = substream->runtime; | |
430 | struct snd_pcm_status status; | |
1da177e4 LT |
431 | int err; |
432 | if (!runtime) { | |
433 | snd_iprintf(buffer, "closed\n"); | |
434 | return; | |
435 | } | |
436 | memset(&status, 0, sizeof(status)); | |
437 | err = snd_pcm_status(substream, &status); | |
438 | if (err < 0) { | |
439 | snd_iprintf(buffer, "error %d\n", err); | |
440 | return; | |
441 | } | |
442 | snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); | |
e7373b70 | 443 | snd_iprintf(buffer, "owner_pid : %d\n", pid_vnr(substream->pid)); |
1da177e4 LT |
444 | snd_iprintf(buffer, "trigger_time: %ld.%09ld\n", |
445 | status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec); | |
446 | snd_iprintf(buffer, "tstamp : %ld.%09ld\n", | |
447 | status.tstamp.tv_sec, status.tstamp.tv_nsec); | |
448 | snd_iprintf(buffer, "delay : %ld\n", status.delay); | |
449 | snd_iprintf(buffer, "avail : %ld\n", status.avail); | |
450 | snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max); | |
451 | snd_iprintf(buffer, "-----\n"); | |
452 | snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); | |
453 | snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); | |
454 | } | |
1da177e4 | 455 | |
61fb63c0 | 456 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
877211f5 TI |
457 | static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry, |
458 | struct snd_info_buffer *buffer) | |
1da177e4 | 459 | { |
877211f5 | 460 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
461 | snd_iprintf(buffer, "%d\n", pstr->xrun_debug); |
462 | } | |
463 | ||
877211f5 TI |
464 | static void snd_pcm_xrun_debug_write(struct snd_info_entry *entry, |
465 | struct snd_info_buffer *buffer) | |
1da177e4 | 466 | { |
877211f5 | 467 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
468 | char line[64]; |
469 | if (!snd_info_get_line(buffer, line, sizeof(line))) | |
470 | pstr->xrun_debug = simple_strtoul(line, NULL, 10); | |
471 | } | |
472 | #endif | |
473 | ||
877211f5 | 474 | static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) |
1da177e4 | 475 | { |
877211f5 TI |
476 | struct snd_pcm *pcm = pstr->pcm; |
477 | struct snd_info_entry *entry; | |
1da177e4 LT |
478 | char name[16]; |
479 | ||
480 | sprintf(name, "pcm%i%c", pcm->device, | |
481 | pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); | |
482 | if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL) | |
483 | return -ENOMEM; | |
484 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
485 | if (snd_info_register(entry) < 0) { | |
486 | snd_info_free_entry(entry); | |
487 | return -ENOMEM; | |
488 | } | |
489 | pstr->proc_root = entry; | |
490 | ||
491 | if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) { | |
bf850204 | 492 | snd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read); |
1da177e4 LT |
493 | if (snd_info_register(entry) < 0) { |
494 | snd_info_free_entry(entry); | |
495 | entry = NULL; | |
496 | } | |
497 | } | |
498 | pstr->proc_info_entry = entry; | |
499 | ||
61fb63c0 | 500 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
877211f5 TI |
501 | if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug", |
502 | pstr->proc_root)) != NULL) { | |
1da177e4 | 503 | entry->c.text.read = snd_pcm_xrun_debug_read; |
1da177e4 | 504 | entry->c.text.write = snd_pcm_xrun_debug_write; |
bd7bf042 | 505 | entry->mode |= S_IWUSR; |
1da177e4 LT |
506 | entry->private_data = pstr; |
507 | if (snd_info_register(entry) < 0) { | |
508 | snd_info_free_entry(entry); | |
509 | entry = NULL; | |
510 | } | |
511 | } | |
512 | pstr->proc_xrun_debug_entry = entry; | |
513 | #endif | |
514 | return 0; | |
515 | } | |
516 | ||
877211f5 | 517 | static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) |
1da177e4 | 518 | { |
61fb63c0 | 519 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
746d4a02 TI |
520 | snd_info_free_entry(pstr->proc_xrun_debug_entry); |
521 | pstr->proc_xrun_debug_entry = NULL; | |
1da177e4 | 522 | #endif |
746d4a02 TI |
523 | snd_info_free_entry(pstr->proc_info_entry); |
524 | pstr->proc_info_entry = NULL; | |
525 | snd_info_free_entry(pstr->proc_root); | |
526 | pstr->proc_root = NULL; | |
1da177e4 LT |
527 | return 0; |
528 | } | |
529 | ||
877211f5 | 530 | static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) |
1da177e4 | 531 | { |
877211f5 TI |
532 | struct snd_info_entry *entry; |
533 | struct snd_card *card; | |
1da177e4 LT |
534 | char name[16]; |
535 | ||
536 | card = substream->pcm->card; | |
537 | ||
538 | sprintf(name, "sub%i", substream->number); | |
539 | if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL) | |
540 | return -ENOMEM; | |
541 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
542 | if (snd_info_register(entry) < 0) { | |
543 | snd_info_free_entry(entry); | |
544 | return -ENOMEM; | |
545 | } | |
546 | substream->proc_root = entry; | |
547 | ||
548 | if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) { | |
bf850204 TI |
549 | snd_info_set_text_ops(entry, substream, |
550 | snd_pcm_substream_proc_info_read); | |
1da177e4 LT |
551 | if (snd_info_register(entry) < 0) { |
552 | snd_info_free_entry(entry); | |
553 | entry = NULL; | |
554 | } | |
555 | } | |
556 | substream->proc_info_entry = entry; | |
557 | ||
558 | if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
559 | snd_info_set_text_ops(entry, substream, |
560 | snd_pcm_substream_proc_hw_params_read); | |
1da177e4 LT |
561 | if (snd_info_register(entry) < 0) { |
562 | snd_info_free_entry(entry); | |
563 | entry = NULL; | |
564 | } | |
565 | } | |
566 | substream->proc_hw_params_entry = entry; | |
567 | ||
568 | if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
569 | snd_info_set_text_ops(entry, substream, |
570 | snd_pcm_substream_proc_sw_params_read); | |
1da177e4 LT |
571 | if (snd_info_register(entry) < 0) { |
572 | snd_info_free_entry(entry); | |
573 | entry = NULL; | |
574 | } | |
575 | } | |
576 | substream->proc_sw_params_entry = entry; | |
577 | ||
578 | if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) { | |
bf850204 TI |
579 | snd_info_set_text_ops(entry, substream, |
580 | snd_pcm_substream_proc_status_read); | |
1da177e4 LT |
581 | if (snd_info_register(entry) < 0) { |
582 | snd_info_free_entry(entry); | |
583 | entry = NULL; | |
584 | } | |
585 | } | |
586 | substream->proc_status_entry = entry; | |
587 | ||
588 | return 0; | |
589 | } | |
746d4a02 | 590 | |
877211f5 | 591 | static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) |
1da177e4 | 592 | { |
746d4a02 TI |
593 | snd_info_free_entry(substream->proc_info_entry); |
594 | substream->proc_info_entry = NULL; | |
595 | snd_info_free_entry(substream->proc_hw_params_entry); | |
596 | substream->proc_hw_params_entry = NULL; | |
597 | snd_info_free_entry(substream->proc_sw_params_entry); | |
598 | substream->proc_sw_params_entry = NULL; | |
599 | snd_info_free_entry(substream->proc_status_entry); | |
600 | substream->proc_status_entry = NULL; | |
601 | snd_info_free_entry(substream->proc_root); | |
602 | substream->proc_root = NULL; | |
1da177e4 LT |
603 | return 0; |
604 | } | |
b7d90a35 | 605 | #else /* !CONFIG_SND_VERBOSE_PROCFS */ |
e28563cc TI |
606 | static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; } |
607 | static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; } | |
608 | static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; } | |
609 | static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; } | |
b7d90a35 | 610 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
1da177e4 LT |
611 | |
612 | /** | |
613 | * snd_pcm_new_stream - create a new PCM stream | |
614 | * @pcm: the pcm instance | |
615 | * @stream: the stream direction, SNDRV_PCM_STREAM_XXX | |
616 | * @substream_count: the number of substreams | |
617 | * | |
618 | * Creates a new stream for the pcm. | |
619 | * The corresponding stream on the pcm must have been empty before | |
620 | * calling this, i.e. zero must be given to the argument of | |
621 | * snd_pcm_new(). | |
622 | * | |
623 | * Returns zero if successful, or a negative error code on failure. | |
624 | */ | |
877211f5 | 625 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count) |
1da177e4 LT |
626 | { |
627 | int idx, err; | |
877211f5 TI |
628 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
629 | struct snd_pcm_substream *substream, *prev; | |
1da177e4 LT |
630 | |
631 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
1a60d4c5 | 632 | mutex_init(&pstr->oss.setup_mutex); |
1da177e4 LT |
633 | #endif |
634 | pstr->stream = stream; | |
635 | pstr->pcm = pcm; | |
636 | pstr->substream_count = substream_count; | |
1da177e4 LT |
637 | if (substream_count > 0) { |
638 | err = snd_pcm_stream_proc_init(pstr); | |
73e77ba0 TI |
639 | if (err < 0) { |
640 | snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n"); | |
1da177e4 | 641 | return err; |
73e77ba0 | 642 | } |
1da177e4 LT |
643 | } |
644 | prev = NULL; | |
645 | for (idx = 0, prev = NULL; idx < substream_count; idx++) { | |
ca2c0966 | 646 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 TI |
647 | if (substream == NULL) { |
648 | snd_printk(KERN_ERR "Cannot allocate PCM substream\n"); | |
1da177e4 | 649 | return -ENOMEM; |
73e77ba0 | 650 | } |
1da177e4 LT |
651 | substream->pcm = pcm; |
652 | substream->pstr = pstr; | |
653 | substream->number = idx; | |
654 | substream->stream = stream; | |
655 | sprintf(substream->name, "subdevice #%i", idx); | |
656 | substream->buffer_bytes_max = UINT_MAX; | |
657 | if (prev == NULL) | |
658 | pstr->substream = substream; | |
659 | else | |
660 | prev->next = substream; | |
661 | err = snd_pcm_substream_proc_init(substream); | |
662 | if (err < 0) { | |
73e77ba0 | 663 | snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n"); |
4d361285 AM |
664 | if (prev == NULL) |
665 | pstr->substream = NULL; | |
666 | else | |
667 | prev->next = NULL; | |
1da177e4 LT |
668 | kfree(substream); |
669 | return err; | |
670 | } | |
671 | substream->group = &substream->self_group; | |
672 | spin_lock_init(&substream->self_group.lock); | |
673 | INIT_LIST_HEAD(&substream->self_group.substreams); | |
674 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
9c323fcb | 675 | atomic_set(&substream->mmap_count, 0); |
1da177e4 LT |
676 | prev = substream; |
677 | } | |
678 | return 0; | |
679 | } | |
680 | ||
e88e8ae6 TI |
681 | EXPORT_SYMBOL(snd_pcm_new_stream); |
682 | ||
1da177e4 LT |
683 | /** |
684 | * snd_pcm_new - create a new PCM instance | |
685 | * @card: the card instance | |
686 | * @id: the id string | |
687 | * @device: the device index (zero based) | |
688 | * @playback_count: the number of substreams for playback | |
689 | * @capture_count: the number of substreams for capture | |
690 | * @rpcm: the pointer to store the new pcm instance | |
691 | * | |
692 | * Creates a new PCM instance. | |
693 | * | |
694 | * The pcm operators have to be set afterwards to the new instance | |
695 | * via snd_pcm_set_ops(). | |
696 | * | |
697 | * Returns zero if successful, or a negative error code on failure. | |
698 | */ | |
e6161653 | 699 | int snd_pcm_new(struct snd_card *card, const char *id, int device, |
1da177e4 | 700 | int playback_count, int capture_count, |
877211f5 | 701 | struct snd_pcm ** rpcm) |
1da177e4 | 702 | { |
877211f5 | 703 | struct snd_pcm *pcm; |
1da177e4 | 704 | int err; |
877211f5 | 705 | static struct snd_device_ops ops = { |
1da177e4 LT |
706 | .dev_free = snd_pcm_dev_free, |
707 | .dev_register = snd_pcm_dev_register, | |
708 | .dev_disconnect = snd_pcm_dev_disconnect, | |
1da177e4 LT |
709 | }; |
710 | ||
7eaa943c TI |
711 | if (snd_BUG_ON(!card)) |
712 | return -ENXIO; | |
713 | if (rpcm) | |
714 | *rpcm = NULL; | |
ca2c0966 | 715 | pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); |
73e77ba0 TI |
716 | if (pcm == NULL) { |
717 | snd_printk(KERN_ERR "Cannot allocate PCM\n"); | |
1da177e4 | 718 | return -ENOMEM; |
73e77ba0 | 719 | } |
1da177e4 LT |
720 | pcm->card = card; |
721 | pcm->device = device; | |
73e77ba0 | 722 | if (id) |
1da177e4 | 723 | strlcpy(pcm->id, id, sizeof(pcm->id)); |
1da177e4 LT |
724 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) { |
725 | snd_pcm_free(pcm); | |
726 | return err; | |
727 | } | |
728 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) { | |
729 | snd_pcm_free(pcm); | |
730 | return err; | |
731 | } | |
1a60d4c5 | 732 | mutex_init(&pcm->open_mutex); |
1da177e4 LT |
733 | init_waitqueue_head(&pcm->open_wait); |
734 | if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) { | |
735 | snd_pcm_free(pcm); | |
736 | return err; | |
737 | } | |
7eaa943c TI |
738 | if (rpcm) |
739 | *rpcm = pcm; | |
1da177e4 LT |
740 | return 0; |
741 | } | |
742 | ||
e88e8ae6 TI |
743 | EXPORT_SYMBOL(snd_pcm_new); |
744 | ||
877211f5 | 745 | static void snd_pcm_free_stream(struct snd_pcm_str * pstr) |
1da177e4 | 746 | { |
877211f5 | 747 | struct snd_pcm_substream *substream, *substream_next; |
1da177e4 | 748 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
877211f5 | 749 | struct snd_pcm_oss_setup *setup, *setupn; |
1da177e4 LT |
750 | #endif |
751 | substream = pstr->substream; | |
752 | while (substream) { | |
753 | substream_next = substream->next; | |
c461482c | 754 | snd_pcm_timer_done(substream); |
1da177e4 LT |
755 | snd_pcm_substream_proc_done(substream); |
756 | kfree(substream); | |
757 | substream = substream_next; | |
758 | } | |
759 | snd_pcm_stream_proc_done(pstr); | |
760 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
761 | for (setup = pstr->oss.setup_list; setup; setup = setupn) { | |
762 | setupn = setup->next; | |
763 | kfree(setup->task_name); | |
764 | kfree(setup); | |
765 | } | |
766 | #endif | |
767 | } | |
768 | ||
877211f5 | 769 | static int snd_pcm_free(struct snd_pcm *pcm) |
1da177e4 | 770 | { |
c461482c TI |
771 | struct snd_pcm_notify *notify; |
772 | ||
7eaa943c TI |
773 | if (!pcm) |
774 | return 0; | |
c461482c TI |
775 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
776 | notify->n_unregister(pcm); | |
777 | } | |
1da177e4 LT |
778 | if (pcm->private_free) |
779 | pcm->private_free(pcm); | |
780 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
781 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]); | |
782 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]); | |
783 | kfree(pcm); | |
784 | return 0; | |
785 | } | |
786 | ||
877211f5 | 787 | static int snd_pcm_dev_free(struct snd_device *device) |
1da177e4 | 788 | { |
877211f5 | 789 | struct snd_pcm *pcm = device->device_data; |
1da177e4 LT |
790 | return snd_pcm_free(pcm); |
791 | } | |
792 | ||
3bf75f9b TI |
793 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, |
794 | struct file *file, | |
795 | struct snd_pcm_substream **rsubstream) | |
1da177e4 | 796 | { |
877211f5 TI |
797 | struct snd_pcm_str * pstr; |
798 | struct snd_pcm_substream *substream; | |
799 | struct snd_pcm_runtime *runtime; | |
800 | struct snd_ctl_file *kctl; | |
801 | struct snd_card *card; | |
1da177e4 LT |
802 | int prefer_subdevice = -1; |
803 | size_t size; | |
804 | ||
7eaa943c TI |
805 | if (snd_BUG_ON(!pcm || !rsubstream)) |
806 | return -ENXIO; | |
1da177e4 | 807 | *rsubstream = NULL; |
1da177e4 | 808 | pstr = &pcm->streams[stream]; |
3bf75f9b | 809 | if (pstr->substream == NULL || pstr->substream_count == 0) |
1da177e4 LT |
810 | return -ENODEV; |
811 | ||
812 | card = pcm->card; | |
399ccdc1 | 813 | read_lock(&card->ctl_files_rwlock); |
9244b2c3 | 814 | list_for_each_entry(kctl, &card->ctl_files, list) { |
25d27ede | 815 | if (kctl->pid == task_pid(current)) { |
1da177e4 | 816 | prefer_subdevice = kctl->prefer_pcm_subdevice; |
2529bba7 TI |
817 | if (prefer_subdevice != -1) |
818 | break; | |
1da177e4 LT |
819 | } |
820 | } | |
399ccdc1 | 821 | read_unlock(&card->ctl_files_rwlock); |
1da177e4 | 822 | |
1da177e4 LT |
823 | switch (stream) { |
824 | case SNDRV_PCM_STREAM_PLAYBACK: | |
825 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
826 | for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; substream; substream = substream->next) { | |
827 | if (SUBSTREAM_BUSY(substream)) | |
828 | return -EAGAIN; | |
829 | } | |
830 | } | |
831 | break; | |
832 | case SNDRV_PCM_STREAM_CAPTURE: | |
833 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
834 | for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next) { | |
835 | if (SUBSTREAM_BUSY(substream)) | |
836 | return -EAGAIN; | |
837 | } | |
838 | } | |
839 | break; | |
840 | default: | |
841 | return -EINVAL; | |
842 | } | |
843 | ||
0df63e44 TI |
844 | if (file->f_flags & O_APPEND) { |
845 | if (prefer_subdevice < 0) { | |
846 | if (pstr->substream_count > 1) | |
847 | return -EINVAL; /* must be unique */ | |
848 | substream = pstr->substream; | |
849 | } else { | |
850 | for (substream = pstr->substream; substream; | |
851 | substream = substream->next) | |
852 | if (substream->number == prefer_subdevice) | |
853 | break; | |
854 | } | |
855 | if (! substream) | |
856 | return -ENODEV; | |
857 | if (! SUBSTREAM_BUSY(substream)) | |
858 | return -EBADFD; | |
859 | substream->ref_count++; | |
860 | *rsubstream = substream; | |
861 | return 0; | |
862 | } | |
863 | ||
1da177e4 LT |
864 | if (prefer_subdevice >= 0) { |
865 | for (substream = pstr->substream; substream; substream = substream->next) | |
866 | if (!SUBSTREAM_BUSY(substream) && substream->number == prefer_subdevice) | |
867 | goto __ok; | |
868 | } | |
869 | for (substream = pstr->substream; substream; substream = substream->next) | |
870 | if (!SUBSTREAM_BUSY(substream)) | |
871 | break; | |
872 | __ok: | |
873 | if (substream == NULL) | |
874 | return -EAGAIN; | |
875 | ||
ca2c0966 | 876 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
1da177e4 LT |
877 | if (runtime == NULL) |
878 | return -ENOMEM; | |
879 | ||
877211f5 | 880 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)); |
1da177e4 LT |
881 | runtime->status = snd_malloc_pages(size, GFP_KERNEL); |
882 | if (runtime->status == NULL) { | |
883 | kfree(runtime); | |
884 | return -ENOMEM; | |
885 | } | |
886 | memset((void*)runtime->status, 0, size); | |
887 | ||
877211f5 | 888 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)); |
1da177e4 LT |
889 | runtime->control = snd_malloc_pages(size, GFP_KERNEL); |
890 | if (runtime->control == NULL) { | |
877211f5 TI |
891 | snd_free_pages((void*)runtime->status, |
892 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
1da177e4 LT |
893 | kfree(runtime); |
894 | return -ENOMEM; | |
895 | } | |
896 | memset((void*)runtime->control, 0, size); | |
897 | ||
898 | init_waitqueue_head(&runtime->sleep); | |
c91a988d | 899 | init_waitqueue_head(&runtime->tsleep); |
1da177e4 LT |
900 | |
901 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
902 | ||
903 | substream->runtime = runtime; | |
904 | substream->private_data = pcm->private_data; | |
0df63e44 TI |
905 | substream->ref_count = 1; |
906 | substream->f_flags = file->f_flags; | |
e7373b70 | 907 | substream->pid = get_pid(task_pid(current)); |
1da177e4 LT |
908 | pstr->substream_opened++; |
909 | *rsubstream = substream; | |
910 | return 0; | |
911 | } | |
912 | ||
3bf75f9b | 913 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream) |
1da177e4 | 914 | { |
877211f5 | 915 | struct snd_pcm_runtime *runtime; |
0df63e44 | 916 | |
7eaa943c TI |
917 | if (PCM_RUNTIME_CHECK(substream)) |
918 | return; | |
1da177e4 | 919 | runtime = substream->runtime; |
1da177e4 LT |
920 | if (runtime->private_free != NULL) |
921 | runtime->private_free(runtime); | |
877211f5 TI |
922 | snd_free_pages((void*)runtime->status, |
923 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
924 | snd_free_pages((void*)runtime->control, | |
925 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))); | |
1da177e4 | 926 | kfree(runtime->hw_constraints.rules); |
4d96eb25 JK |
927 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
928 | if (runtime->hwptr_log) | |
929 | kfree(runtime->hwptr_log); | |
930 | #endif | |
1da177e4 LT |
931 | kfree(runtime); |
932 | substream->runtime = NULL; | |
e7373b70 CL |
933 | put_pid(substream->pid); |
934 | substream->pid = NULL; | |
1da177e4 LT |
935 | substream->pstr->substream_opened--; |
936 | } | |
937 | ||
d80f19fa GKH |
938 | static ssize_t show_pcm_class(struct device *dev, |
939 | struct device_attribute *attr, char *buf) | |
9d19f48c TI |
940 | { |
941 | struct snd_pcm *pcm; | |
942 | const char *str; | |
943 | static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = { | |
944 | [SNDRV_PCM_CLASS_GENERIC] = "generic", | |
945 | [SNDRV_PCM_CLASS_MULTI] = "multi", | |
946 | [SNDRV_PCM_CLASS_MODEM] = "modem", | |
947 | [SNDRV_PCM_CLASS_DIGITIZER] = "digitizer", | |
948 | }; | |
949 | ||
d80f19fa | 950 | if (! (pcm = dev_get_drvdata(dev)) || |
9d19f48c TI |
951 | pcm->dev_class > SNDRV_PCM_CLASS_LAST) |
952 | str = "none"; | |
953 | else | |
954 | str = strs[pcm->dev_class]; | |
955 | return snprintf(buf, PAGE_SIZE, "%s\n", str); | |
956 | } | |
957 | ||
d80f19fa | 958 | static struct device_attribute pcm_attrs = |
9d19f48c TI |
959 | __ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL); |
960 | ||
877211f5 | 961 | static int snd_pcm_dev_register(struct snd_device *device) |
1da177e4 | 962 | { |
f87135f5 | 963 | int cidx, err; |
877211f5 | 964 | struct snd_pcm_substream *substream; |
9244b2c3 | 965 | struct snd_pcm_notify *notify; |
1da177e4 | 966 | char str[16]; |
4b3be6af | 967 | struct snd_pcm *pcm; |
c78085fc | 968 | struct device *dev; |
1da177e4 | 969 | |
4b3be6af | 970 | if (snd_BUG_ON(!device || !device->device_data)) |
7eaa943c | 971 | return -ENXIO; |
4b3be6af | 972 | pcm = device->device_data; |
1a60d4c5 | 973 | mutex_lock(®ister_mutex); |
f90c06a2 PM |
974 | err = snd_pcm_add(pcm); |
975 | if (err) { | |
1a60d4c5 | 976 | mutex_unlock(®ister_mutex); |
f90c06a2 | 977 | return err; |
1da177e4 | 978 | } |
1da177e4 LT |
979 | for (cidx = 0; cidx < 2; cidx++) { |
980 | int devtype = -1; | |
981 | if (pcm->streams[cidx].substream == NULL) | |
982 | continue; | |
983 | switch (cidx) { | |
984 | case SNDRV_PCM_STREAM_PLAYBACK: | |
985 | sprintf(str, "pcmC%iD%ip", pcm->card->number, pcm->device); | |
1da177e4 LT |
986 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
987 | break; | |
988 | case SNDRV_PCM_STREAM_CAPTURE: | |
989 | sprintf(str, "pcmC%iD%ic", pcm->card->number, pcm->device); | |
1da177e4 LT |
990 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
991 | break; | |
992 | } | |
c78085fc JB |
993 | /* device pointer to use, pcm->dev takes precedence if |
994 | * it is assigned, otherwise fall back to card's device | |
995 | * if possible */ | |
996 | dev = pcm->dev; | |
997 | if (!dev) | |
c2902c8a | 998 | dev = snd_card_get_device_link(pcm->card); |
c78085fc JB |
999 | /* register pcm */ |
1000 | err = snd_register_device_for_dev(devtype, pcm->card, | |
1001 | pcm->device, | |
1002 | &snd_pcm_f_ops[cidx], | |
1003 | pcm, str, dev); | |
1004 | if (err < 0) { | |
f87135f5 | 1005 | list_del(&pcm->list); |
1a60d4c5 | 1006 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1007 | return err; |
1008 | } | |
9d19f48c TI |
1009 | snd_add_device_sysfs_file(devtype, pcm->card, pcm->device, |
1010 | &pcm_attrs); | |
1da177e4 LT |
1011 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
1012 | snd_pcm_timer_init(substream); | |
1013 | } | |
9244b2c3 JB |
1014 | |
1015 | list_for_each_entry(notify, &snd_pcm_notify_list, list) | |
1da177e4 | 1016 | notify->n_register(pcm); |
9244b2c3 | 1017 | |
1a60d4c5 | 1018 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1019 | return 0; |
1020 | } | |
1021 | ||
877211f5 | 1022 | static int snd_pcm_dev_disconnect(struct snd_device *device) |
1da177e4 | 1023 | { |
877211f5 | 1024 | struct snd_pcm *pcm = device->device_data; |
c461482c | 1025 | struct snd_pcm_notify *notify; |
877211f5 | 1026 | struct snd_pcm_substream *substream; |
c461482c | 1027 | int cidx, devtype; |
1da177e4 | 1028 | |
1a60d4c5 | 1029 | mutex_lock(®ister_mutex); |
c461482c TI |
1030 | if (list_empty(&pcm->list)) |
1031 | goto unlock; | |
1032 | ||
f87135f5 | 1033 | list_del_init(&pcm->list); |
1da177e4 LT |
1034 | for (cidx = 0; cidx < 2; cidx++) |
1035 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) | |
1036 | if (substream->runtime) | |
1037 | substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED; | |
c461482c | 1038 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
1da177e4 LT |
1039 | notify->n_disconnect(pcm); |
1040 | } | |
1da177e4 LT |
1041 | for (cidx = 0; cidx < 2; cidx++) { |
1042 | devtype = -1; | |
1043 | switch (cidx) { | |
1044 | case SNDRV_PCM_STREAM_PLAYBACK: | |
1045 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; | |
1046 | break; | |
1047 | case SNDRV_PCM_STREAM_CAPTURE: | |
1048 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; | |
1049 | break; | |
1050 | } | |
1051 | snd_unregister_device(devtype, pcm->card, pcm->device); | |
1da177e4 | 1052 | } |
c461482c | 1053 | unlock: |
1a60d4c5 | 1054 | mutex_unlock(®ister_mutex); |
c461482c | 1055 | return 0; |
1da177e4 LT |
1056 | } |
1057 | ||
877211f5 | 1058 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree) |
1da177e4 | 1059 | { |
9244b2c3 | 1060 | struct snd_pcm *pcm; |
1da177e4 | 1061 | |
7eaa943c TI |
1062 | if (snd_BUG_ON(!notify || |
1063 | !notify->n_register || | |
1064 | !notify->n_unregister || | |
1065 | !notify->n_disconnect)) | |
1066 | return -EINVAL; | |
1a60d4c5 | 1067 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1068 | if (nfree) { |
1069 | list_del(¬ify->list); | |
9244b2c3 JB |
1070 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1071 | notify->n_unregister(pcm); | |
1da177e4 LT |
1072 | } else { |
1073 | list_add_tail(¬ify->list, &snd_pcm_notify_list); | |
9244b2c3 JB |
1074 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1075 | notify->n_register(pcm); | |
1da177e4 | 1076 | } |
1a60d4c5 | 1077 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1078 | return 0; |
1079 | } | |
1080 | ||
e88e8ae6 TI |
1081 | EXPORT_SYMBOL(snd_pcm_notify); |
1082 | ||
e28563cc | 1083 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1084 | /* |
1085 | * Info interface | |
1086 | */ | |
1087 | ||
877211f5 TI |
1088 | static void snd_pcm_proc_read(struct snd_info_entry *entry, |
1089 | struct snd_info_buffer *buffer) | |
1da177e4 | 1090 | { |
877211f5 | 1091 | struct snd_pcm *pcm; |
1da177e4 | 1092 | |
1a60d4c5 | 1093 | mutex_lock(®ister_mutex); |
9244b2c3 | 1094 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
f87135f5 CL |
1095 | snd_iprintf(buffer, "%02i-%02i: %s : %s", |
1096 | pcm->card->number, pcm->device, pcm->id, pcm->name); | |
1da177e4 | 1097 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) |
877211f5 TI |
1098 | snd_iprintf(buffer, " : playback %i", |
1099 | pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count); | |
1da177e4 | 1100 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) |
877211f5 TI |
1101 | snd_iprintf(buffer, " : capture %i", |
1102 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); | |
1da177e4 LT |
1103 | snd_iprintf(buffer, "\n"); |
1104 | } | |
1a60d4c5 | 1105 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1106 | } |
1107 | ||
6581f4e7 | 1108 | static struct snd_info_entry *snd_pcm_proc_entry; |
1da177e4 | 1109 | |
e28563cc | 1110 | static void snd_pcm_proc_init(void) |
1da177e4 | 1111 | { |
877211f5 | 1112 | struct snd_info_entry *entry; |
1da177e4 | 1113 | |
1da177e4 | 1114 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) { |
bf850204 | 1115 | snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read); |
1da177e4 LT |
1116 | if (snd_info_register(entry) < 0) { |
1117 | snd_info_free_entry(entry); | |
1118 | entry = NULL; | |
1119 | } | |
1120 | } | |
1121 | snd_pcm_proc_entry = entry; | |
e28563cc TI |
1122 | } |
1123 | ||
1124 | static void snd_pcm_proc_done(void) | |
1125 | { | |
746d4a02 | 1126 | snd_info_free_entry(snd_pcm_proc_entry); |
e28563cc TI |
1127 | } |
1128 | ||
1129 | #else /* !CONFIG_PROC_FS */ | |
1130 | #define snd_pcm_proc_init() | |
1131 | #define snd_pcm_proc_done() | |
1132 | #endif /* CONFIG_PROC_FS */ | |
1133 | ||
1134 | ||
1135 | /* | |
1136 | * ENTRY functions | |
1137 | */ | |
1138 | ||
1139 | static int __init alsa_pcm_init(void) | |
1140 | { | |
1141 | snd_ctl_register_ioctl(snd_pcm_control_ioctl); | |
1142 | snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl); | |
1143 | snd_pcm_proc_init(); | |
1da177e4 LT |
1144 | return 0; |
1145 | } | |
1146 | ||
1147 | static void __exit alsa_pcm_exit(void) | |
1148 | { | |
1149 | snd_ctl_unregister_ioctl(snd_pcm_control_ioctl); | |
1150 | snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl); | |
e28563cc | 1151 | snd_pcm_proc_done(); |
1da177e4 LT |
1152 | } |
1153 | ||
1154 | module_init(alsa_pcm_init) | |
1155 | module_exit(alsa_pcm_exit) |