]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Digital Audio (PCM) abstract layer | |
3 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> | |
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 | ||
22 | #include <sound/driver.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/time.h> | |
1a60d4c5 | 26 | #include <linux/mutex.h> |
1da177e4 LT |
27 | #include <sound/core.h> |
28 | #include <sound/minors.h> | |
29 | #include <sound/pcm.h> | |
30 | #include <sound/control.h> | |
31 | #include <sound/info.h> | |
32 | ||
33 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>"); | |
34 | MODULE_DESCRIPTION("Midlevel PCM code for ALSA."); | |
35 | MODULE_LICENSE("GPL"); | |
36 | ||
f87135f5 | 37 | static LIST_HEAD(snd_pcm_devices); |
1da177e4 | 38 | static LIST_HEAD(snd_pcm_notify_list); |
1a60d4c5 | 39 | static DEFINE_MUTEX(register_mutex); |
1da177e4 | 40 | |
877211f5 TI |
41 | static int snd_pcm_free(struct snd_pcm *pcm); |
42 | static int snd_pcm_dev_free(struct snd_device *device); | |
43 | static int snd_pcm_dev_register(struct snd_device *device); | |
44 | static int snd_pcm_dev_disconnect(struct snd_device *device); | |
45 | static int snd_pcm_dev_unregister(struct snd_device *device); | |
1da177e4 | 46 | |
f87135f5 CL |
47 | static struct snd_pcm *snd_pcm_search(struct snd_card *card, int device) |
48 | { | |
49 | struct list_head *p; | |
50 | struct snd_pcm *pcm; | |
51 | ||
52 | list_for_each(p, &snd_pcm_devices) { | |
53 | pcm = list_entry(p, struct snd_pcm, list); | |
54 | if (pcm->card == card && pcm->device == device) | |
55 | return pcm; | |
56 | } | |
57 | return NULL; | |
58 | } | |
59 | ||
877211f5 TI |
60 | static int snd_pcm_control_ioctl(struct snd_card *card, |
61 | struct snd_ctl_file *control, | |
1da177e4 LT |
62 | unsigned int cmd, unsigned long arg) |
63 | { | |
1da177e4 LT |
64 | switch (cmd) { |
65 | case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE: | |
66 | { | |
67 | int device; | |
68 | ||
69 | if (get_user(device, (int __user *)arg)) | |
70 | return -EFAULT; | |
1a60d4c5 | 71 | mutex_lock(®ister_mutex); |
1da177e4 LT |
72 | device = device < 0 ? 0 : device + 1; |
73 | while (device < SNDRV_PCM_DEVICES) { | |
f87135f5 | 74 | if (snd_pcm_search(card, device)) |
1da177e4 LT |
75 | break; |
76 | device++; | |
77 | } | |
78 | if (device == SNDRV_PCM_DEVICES) | |
79 | device = -1; | |
1a60d4c5 | 80 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
81 | if (put_user(device, (int __user *)arg)) |
82 | return -EFAULT; | |
83 | return 0; | |
84 | } | |
85 | case SNDRV_CTL_IOCTL_PCM_INFO: | |
86 | { | |
877211f5 | 87 | struct snd_pcm_info __user *info; |
1da177e4 | 88 | unsigned int device, subdevice; |
877211f5 TI |
89 | int stream; |
90 | struct snd_pcm *pcm; | |
91 | struct snd_pcm_str *pstr; | |
92 | struct snd_pcm_substream *substream; | |
f87135f5 CL |
93 | int err; |
94 | ||
877211f5 | 95 | info = (struct snd_pcm_info __user *)arg; |
1da177e4 LT |
96 | if (get_user(device, &info->device)) |
97 | return -EFAULT; | |
1da177e4 LT |
98 | if (get_user(stream, &info->stream)) |
99 | return -EFAULT; | |
100 | if (stream < 0 || stream > 1) | |
101 | return -EINVAL; | |
1da177e4 LT |
102 | if (get_user(subdevice, &info->subdevice)) |
103 | return -EFAULT; | |
1a60d4c5 | 104 | mutex_lock(®ister_mutex); |
f87135f5 CL |
105 | pcm = snd_pcm_search(card, device); |
106 | if (pcm == NULL) { | |
107 | err = -ENXIO; | |
108 | goto _error; | |
109 | } | |
110 | pstr = &pcm->streams[stream]; | |
111 | if (pstr->substream_count == 0) { | |
112 | err = -ENOENT; | |
113 | goto _error; | |
114 | } | |
115 | if (subdevice >= pstr->substream_count) { | |
116 | err = -ENXIO; | |
117 | goto _error; | |
118 | } | |
119 | for (substream = pstr->substream; substream; | |
120 | substream = substream->next) | |
1da177e4 LT |
121 | if (substream->number == (int)subdevice) |
122 | break; | |
f87135f5 CL |
123 | if (substream == NULL) { |
124 | err = -ENXIO; | |
125 | goto _error; | |
126 | } | |
127 | err = snd_pcm_info_user(substream, info); | |
128 | _error: | |
1a60d4c5 | 129 | mutex_unlock(®ister_mutex); |
f87135f5 | 130 | return err; |
1da177e4 LT |
131 | } |
132 | case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE: | |
133 | { | |
134 | int val; | |
135 | ||
136 | if (get_user(val, (int __user *)arg)) | |
137 | return -EFAULT; | |
138 | control->prefer_pcm_subdevice = val; | |
139 | return 0; | |
140 | } | |
141 | } | |
142 | return -ENOIOCTLCMD; | |
143 | } | |
21a3479a JK |
144 | |
145 | #if defined(CONFIG_PROC_FS) && defined(CONFIG_SND_VERBOSE_PROCFS) | |
146 | ||
1da177e4 LT |
147 | #define STATE(v) [SNDRV_PCM_STATE_##v] = #v |
148 | #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v | |
149 | #define READY(v) [SNDRV_PCM_READY_##v] = #v | |
150 | #define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v | |
151 | #define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v | |
152 | #define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v | |
153 | #define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v | |
154 | #define START(v) [SNDRV_PCM_START_##v] = #v | |
155 | #define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v | |
156 | #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v | |
157 | ||
1da177e4 LT |
158 | static char *snd_pcm_format_names[] = { |
159 | FORMAT(S8), | |
160 | FORMAT(U8), | |
161 | FORMAT(S16_LE), | |
162 | FORMAT(S16_BE), | |
163 | FORMAT(U16_LE), | |
164 | FORMAT(U16_BE), | |
165 | FORMAT(S24_LE), | |
166 | FORMAT(S24_BE), | |
167 | FORMAT(U24_LE), | |
168 | FORMAT(U24_BE), | |
169 | FORMAT(S32_LE), | |
170 | FORMAT(S32_BE), | |
171 | FORMAT(U32_LE), | |
172 | FORMAT(U32_BE), | |
173 | FORMAT(FLOAT_LE), | |
174 | FORMAT(FLOAT_BE), | |
175 | FORMAT(FLOAT64_LE), | |
176 | FORMAT(FLOAT64_BE), | |
177 | FORMAT(IEC958_SUBFRAME_LE), | |
178 | FORMAT(IEC958_SUBFRAME_BE), | |
179 | FORMAT(MU_LAW), | |
180 | FORMAT(A_LAW), | |
181 | FORMAT(IMA_ADPCM), | |
182 | FORMAT(MPEG), | |
183 | FORMAT(GSM), | |
184 | FORMAT(SPECIAL), | |
185 | FORMAT(S24_3LE), | |
186 | FORMAT(S24_3BE), | |
187 | FORMAT(U24_3LE), | |
188 | FORMAT(U24_3BE), | |
189 | FORMAT(S20_3LE), | |
190 | FORMAT(S20_3BE), | |
191 | FORMAT(U20_3LE), | |
192 | FORMAT(U20_3BE), | |
193 | FORMAT(S18_3LE), | |
194 | FORMAT(S18_3BE), | |
195 | FORMAT(U18_3LE), | |
196 | FORMAT(U18_3BE), | |
197 | }; | |
198 | ||
12831c15 | 199 | static const char *snd_pcm_format_name(snd_pcm_format_t format) |
e28563cc TI |
200 | { |
201 | return snd_pcm_format_names[format]; | |
202 | } | |
203 | ||
e28563cc TI |
204 | static char *snd_pcm_stream_names[] = { |
205 | STREAM(PLAYBACK), | |
206 | STREAM(CAPTURE), | |
207 | }; | |
208 | ||
209 | static char *snd_pcm_state_names[] = { | |
210 | STATE(OPEN), | |
211 | STATE(SETUP), | |
212 | STATE(PREPARED), | |
213 | STATE(RUNNING), | |
214 | STATE(XRUN), | |
215 | STATE(DRAINING), | |
216 | STATE(PAUSED), | |
217 | STATE(SUSPENDED), | |
218 | }; | |
219 | ||
220 | static char *snd_pcm_access_names[] = { | |
221 | ACCESS(MMAP_INTERLEAVED), | |
222 | ACCESS(MMAP_NONINTERLEAVED), | |
223 | ACCESS(MMAP_COMPLEX), | |
224 | ACCESS(RW_INTERLEAVED), | |
225 | ACCESS(RW_NONINTERLEAVED), | |
226 | }; | |
227 | ||
1da177e4 LT |
228 | static char *snd_pcm_subformat_names[] = { |
229 | SUBFORMAT(STD), | |
230 | }; | |
231 | ||
232 | static char *snd_pcm_tstamp_mode_names[] = { | |
233 | TSTAMP(NONE), | |
234 | TSTAMP(MMAP), | |
235 | }; | |
236 | ||
877211f5 | 237 | static const char *snd_pcm_stream_name(int stream) |
1da177e4 LT |
238 | { |
239 | snd_assert(stream <= SNDRV_PCM_STREAM_LAST, return NULL); | |
240 | return snd_pcm_stream_names[stream]; | |
241 | } | |
242 | ||
243 | static const char *snd_pcm_access_name(snd_pcm_access_t access) | |
244 | { | |
1da177e4 LT |
245 | return snd_pcm_access_names[access]; |
246 | } | |
247 | ||
1da177e4 LT |
248 | static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat) |
249 | { | |
1da177e4 LT |
250 | return snd_pcm_subformat_names[subformat]; |
251 | } | |
252 | ||
877211f5 | 253 | static const char *snd_pcm_tstamp_mode_name(int mode) |
1da177e4 LT |
254 | { |
255 | snd_assert(mode <= SNDRV_PCM_TSTAMP_LAST, return NULL); | |
256 | return snd_pcm_tstamp_mode_names[mode]; | |
257 | } | |
258 | ||
259 | static const char *snd_pcm_state_name(snd_pcm_state_t state) | |
260 | { | |
1da177e4 LT |
261 | return snd_pcm_state_names[state]; |
262 | } | |
263 | ||
264 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
265 | #include <linux/soundcard.h> | |
1a60d4c5 | 266 | |
1da177e4 LT |
267 | static const char *snd_pcm_oss_format_name(int format) |
268 | { | |
269 | switch (format) { | |
270 | case AFMT_MU_LAW: | |
271 | return "MU_LAW"; | |
272 | case AFMT_A_LAW: | |
273 | return "A_LAW"; | |
274 | case AFMT_IMA_ADPCM: | |
275 | return "IMA_ADPCM"; | |
276 | case AFMT_U8: | |
277 | return "U8"; | |
278 | case AFMT_S16_LE: | |
279 | return "S16_LE"; | |
280 | case AFMT_S16_BE: | |
281 | return "S16_BE"; | |
282 | case AFMT_S8: | |
283 | return "S8"; | |
284 | case AFMT_U16_LE: | |
285 | return "U16_LE"; | |
286 | case AFMT_U16_BE: | |
287 | return "U16_BE"; | |
288 | case AFMT_MPEG: | |
289 | return "MPEG"; | |
290 | default: | |
291 | return "unknown"; | |
292 | } | |
293 | } | |
294 | #endif | |
295 | ||
877211f5 TI |
296 | static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, |
297 | struct snd_info_buffer *buffer) | |
1da177e4 | 298 | { |
877211f5 | 299 | struct snd_pcm_info *info; |
1da177e4 LT |
300 | int err; |
301 | ||
7c22f1aa TI |
302 | if (! substream) |
303 | return; | |
1da177e4 LT |
304 | |
305 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
306 | if (! info) { | |
307 | printk(KERN_DEBUG "snd_pcm_proc_info_read: cannot malloc\n"); | |
308 | return; | |
309 | } | |
310 | ||
311 | err = snd_pcm_info(substream, info); | |
312 | if (err < 0) { | |
313 | snd_iprintf(buffer, "error %d\n", err); | |
314 | kfree(info); | |
315 | return; | |
316 | } | |
317 | snd_iprintf(buffer, "card: %d\n", info->card); | |
318 | snd_iprintf(buffer, "device: %d\n", info->device); | |
319 | snd_iprintf(buffer, "subdevice: %d\n", info->subdevice); | |
320 | snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream)); | |
321 | snd_iprintf(buffer, "id: %s\n", info->id); | |
322 | snd_iprintf(buffer, "name: %s\n", info->name); | |
323 | snd_iprintf(buffer, "subname: %s\n", info->subname); | |
324 | snd_iprintf(buffer, "class: %d\n", info->dev_class); | |
325 | snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); | |
326 | snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); | |
327 | snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); | |
328 | kfree(info); | |
329 | } | |
330 | ||
877211f5 TI |
331 | static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry, |
332 | struct snd_info_buffer *buffer) | |
1da177e4 | 333 | { |
877211f5 TI |
334 | snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream, |
335 | buffer); | |
1da177e4 LT |
336 | } |
337 | ||
877211f5 TI |
338 | static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry, |
339 | struct snd_info_buffer *buffer) | |
1da177e4 | 340 | { |
877211f5 TI |
341 | snd_pcm_proc_info_read((struct snd_pcm_substream *)entry->private_data, |
342 | buffer); | |
1da177e4 LT |
343 | } |
344 | ||
877211f5 TI |
345 | static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry, |
346 | struct snd_info_buffer *buffer) | |
1da177e4 | 347 | { |
877211f5 TI |
348 | struct snd_pcm_substream *substream = entry->private_data; |
349 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
350 | if (!runtime) { |
351 | snd_iprintf(buffer, "closed\n"); | |
352 | return; | |
353 | } | |
354 | snd_pcm_stream_lock_irq(substream); | |
355 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
356 | snd_iprintf(buffer, "no setup\n"); | |
357 | snd_pcm_stream_unlock_irq(substream); | |
358 | return; | |
359 | } | |
360 | snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); | |
361 | snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); | |
362 | snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat)); | |
363 | snd_iprintf(buffer, "channels: %u\n", runtime->channels); | |
364 | snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den); | |
365 | snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size); | |
366 | snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size); | |
367 | snd_iprintf(buffer, "tick_time: %u\n", runtime->tick_time); | |
368 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
369 | if (substream->oss.oss) { | |
370 | snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format)); | |
371 | snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels); | |
372 | snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate); | |
373 | snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes); | |
374 | snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods); | |
375 | snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); | |
376 | } | |
377 | #endif | |
378 | snd_pcm_stream_unlock_irq(substream); | |
379 | } | |
380 | ||
877211f5 TI |
381 | static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, |
382 | struct snd_info_buffer *buffer) | |
1da177e4 | 383 | { |
877211f5 TI |
384 | struct snd_pcm_substream *substream = entry->private_data; |
385 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
386 | if (!runtime) { |
387 | snd_iprintf(buffer, "closed\n"); | |
388 | return; | |
389 | } | |
390 | snd_pcm_stream_lock_irq(substream); | |
391 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
392 | snd_iprintf(buffer, "no setup\n"); | |
393 | snd_pcm_stream_unlock_irq(substream); | |
394 | return; | |
395 | } | |
396 | snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); | |
397 | snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); | |
398 | snd_iprintf(buffer, "sleep_min: %u\n", runtime->sleep_min); | |
399 | snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min); | |
400 | snd_iprintf(buffer, "xfer_align: %lu\n", runtime->xfer_align); | |
401 | snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold); | |
402 | snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold); | |
403 | snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); | |
404 | snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); | |
405 | snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); | |
406 | snd_pcm_stream_unlock_irq(substream); | |
407 | } | |
408 | ||
877211f5 TI |
409 | static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, |
410 | struct snd_info_buffer *buffer) | |
1da177e4 | 411 | { |
877211f5 TI |
412 | struct snd_pcm_substream *substream = entry->private_data; |
413 | struct snd_pcm_runtime *runtime = substream->runtime; | |
414 | struct snd_pcm_status status; | |
1da177e4 LT |
415 | int err; |
416 | if (!runtime) { | |
417 | snd_iprintf(buffer, "closed\n"); | |
418 | return; | |
419 | } | |
420 | memset(&status, 0, sizeof(status)); | |
421 | err = snd_pcm_status(substream, &status); | |
422 | if (err < 0) { | |
423 | snd_iprintf(buffer, "error %d\n", err); | |
424 | return; | |
425 | } | |
426 | snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); | |
427 | snd_iprintf(buffer, "trigger_time: %ld.%09ld\n", | |
428 | status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec); | |
429 | snd_iprintf(buffer, "tstamp : %ld.%09ld\n", | |
430 | status.tstamp.tv_sec, status.tstamp.tv_nsec); | |
431 | snd_iprintf(buffer, "delay : %ld\n", status.delay); | |
432 | snd_iprintf(buffer, "avail : %ld\n", status.avail); | |
433 | snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max); | |
434 | snd_iprintf(buffer, "-----\n"); | |
435 | snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); | |
436 | snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); | |
437 | } | |
1da177e4 LT |
438 | |
439 | #ifdef CONFIG_SND_DEBUG | |
877211f5 TI |
440 | static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry, |
441 | struct snd_info_buffer *buffer) | |
1da177e4 | 442 | { |
877211f5 | 443 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
444 | snd_iprintf(buffer, "%d\n", pstr->xrun_debug); |
445 | } | |
446 | ||
877211f5 TI |
447 | static void snd_pcm_xrun_debug_write(struct snd_info_entry *entry, |
448 | struct snd_info_buffer *buffer) | |
1da177e4 | 449 | { |
877211f5 | 450 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
451 | char line[64]; |
452 | if (!snd_info_get_line(buffer, line, sizeof(line))) | |
453 | pstr->xrun_debug = simple_strtoul(line, NULL, 10); | |
454 | } | |
455 | #endif | |
456 | ||
877211f5 | 457 | static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) |
1da177e4 | 458 | { |
877211f5 TI |
459 | struct snd_pcm *pcm = pstr->pcm; |
460 | struct snd_info_entry *entry; | |
1da177e4 LT |
461 | char name[16]; |
462 | ||
463 | sprintf(name, "pcm%i%c", pcm->device, | |
464 | pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); | |
465 | if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL) | |
466 | return -ENOMEM; | |
467 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
468 | if (snd_info_register(entry) < 0) { | |
469 | snd_info_free_entry(entry); | |
470 | return -ENOMEM; | |
471 | } | |
472 | pstr->proc_root = entry; | |
473 | ||
474 | if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) { | |
475 | snd_info_set_text_ops(entry, pstr, 256, snd_pcm_stream_proc_info_read); | |
476 | if (snd_info_register(entry) < 0) { | |
477 | snd_info_free_entry(entry); | |
478 | entry = NULL; | |
479 | } | |
480 | } | |
481 | pstr->proc_info_entry = entry; | |
482 | ||
483 | #ifdef CONFIG_SND_DEBUG | |
877211f5 TI |
484 | if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug", |
485 | pstr->proc_root)) != NULL) { | |
1da177e4 LT |
486 | entry->c.text.read_size = 64; |
487 | entry->c.text.read = snd_pcm_xrun_debug_read; | |
488 | entry->c.text.write_size = 64; | |
489 | entry->c.text.write = snd_pcm_xrun_debug_write; | |
bd7bf042 | 490 | entry->mode |= S_IWUSR; |
1da177e4 LT |
491 | entry->private_data = pstr; |
492 | if (snd_info_register(entry) < 0) { | |
493 | snd_info_free_entry(entry); | |
494 | entry = NULL; | |
495 | } | |
496 | } | |
497 | pstr->proc_xrun_debug_entry = entry; | |
498 | #endif | |
499 | return 0; | |
500 | } | |
501 | ||
877211f5 | 502 | static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) |
1da177e4 LT |
503 | { |
504 | #ifdef CONFIG_SND_DEBUG | |
505 | if (pstr->proc_xrun_debug_entry) { | |
506 | snd_info_unregister(pstr->proc_xrun_debug_entry); | |
507 | pstr->proc_xrun_debug_entry = NULL; | |
508 | } | |
509 | #endif | |
510 | if (pstr->proc_info_entry) { | |
511 | snd_info_unregister(pstr->proc_info_entry); | |
512 | pstr->proc_info_entry = NULL; | |
513 | } | |
514 | if (pstr->proc_root) { | |
515 | snd_info_unregister(pstr->proc_root); | |
516 | pstr->proc_root = NULL; | |
517 | } | |
518 | return 0; | |
519 | } | |
520 | ||
877211f5 | 521 | static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) |
1da177e4 | 522 | { |
877211f5 TI |
523 | struct snd_info_entry *entry; |
524 | struct snd_card *card; | |
1da177e4 LT |
525 | char name[16]; |
526 | ||
527 | card = substream->pcm->card; | |
528 | ||
529 | sprintf(name, "sub%i", substream->number); | |
530 | if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL) | |
531 | return -ENOMEM; | |
532 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
533 | if (snd_info_register(entry) < 0) { | |
534 | snd_info_free_entry(entry); | |
535 | return -ENOMEM; | |
536 | } | |
537 | substream->proc_root = entry; | |
538 | ||
539 | if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) { | |
540 | snd_info_set_text_ops(entry, substream, 256, snd_pcm_substream_proc_info_read); | |
541 | if (snd_info_register(entry) < 0) { | |
542 | snd_info_free_entry(entry); | |
543 | entry = NULL; | |
544 | } | |
545 | } | |
546 | substream->proc_info_entry = entry; | |
547 | ||
548 | if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) { | |
549 | snd_info_set_text_ops(entry, substream, 256, snd_pcm_substream_proc_hw_params_read); | |
550 | if (snd_info_register(entry) < 0) { | |
551 | snd_info_free_entry(entry); | |
552 | entry = NULL; | |
553 | } | |
554 | } | |
555 | substream->proc_hw_params_entry = entry; | |
556 | ||
557 | if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) { | |
558 | snd_info_set_text_ops(entry, substream, 256, snd_pcm_substream_proc_sw_params_read); | |
559 | if (snd_info_register(entry) < 0) { | |
560 | snd_info_free_entry(entry); | |
561 | entry = NULL; | |
562 | } | |
563 | } | |
564 | substream->proc_sw_params_entry = entry; | |
565 | ||
566 | if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) { | |
567 | snd_info_set_text_ops(entry, substream, 256, snd_pcm_substream_proc_status_read); | |
568 | if (snd_info_register(entry) < 0) { | |
569 | snd_info_free_entry(entry); | |
570 | entry = NULL; | |
571 | } | |
572 | } | |
573 | substream->proc_status_entry = entry; | |
574 | ||
575 | return 0; | |
576 | } | |
577 | ||
877211f5 | 578 | static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) |
1da177e4 LT |
579 | { |
580 | if (substream->proc_info_entry) { | |
581 | snd_info_unregister(substream->proc_info_entry); | |
582 | substream->proc_info_entry = NULL; | |
583 | } | |
584 | if (substream->proc_hw_params_entry) { | |
585 | snd_info_unregister(substream->proc_hw_params_entry); | |
586 | substream->proc_hw_params_entry = NULL; | |
587 | } | |
588 | if (substream->proc_sw_params_entry) { | |
589 | snd_info_unregister(substream->proc_sw_params_entry); | |
590 | substream->proc_sw_params_entry = NULL; | |
591 | } | |
592 | if (substream->proc_status_entry) { | |
593 | snd_info_unregister(substream->proc_status_entry); | |
594 | substream->proc_status_entry = NULL; | |
595 | } | |
596 | if (substream->proc_root) { | |
597 | snd_info_unregister(substream->proc_root); | |
598 | substream->proc_root = NULL; | |
599 | } | |
600 | return 0; | |
601 | } | |
e28563cc TI |
602 | #else /* !CONFIG_PROC_FS */ |
603 | static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; } | |
604 | static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; } | |
605 | static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; } | |
606 | static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; } | |
607 | #endif /* CONFIG_PROC_FS */ | |
1da177e4 LT |
608 | |
609 | /** | |
610 | * snd_pcm_new_stream - create a new PCM stream | |
611 | * @pcm: the pcm instance | |
612 | * @stream: the stream direction, SNDRV_PCM_STREAM_XXX | |
613 | * @substream_count: the number of substreams | |
614 | * | |
615 | * Creates a new stream for the pcm. | |
616 | * The corresponding stream on the pcm must have been empty before | |
617 | * calling this, i.e. zero must be given to the argument of | |
618 | * snd_pcm_new(). | |
619 | * | |
620 | * Returns zero if successful, or a negative error code on failure. | |
621 | */ | |
877211f5 | 622 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count) |
1da177e4 LT |
623 | { |
624 | int idx, err; | |
877211f5 TI |
625 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
626 | struct snd_pcm_substream *substream, *prev; | |
1da177e4 LT |
627 | |
628 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
1a60d4c5 | 629 | mutex_init(&pstr->oss.setup_mutex); |
1da177e4 LT |
630 | #endif |
631 | pstr->stream = stream; | |
632 | pstr->pcm = pcm; | |
633 | pstr->substream_count = substream_count; | |
1da177e4 LT |
634 | if (substream_count > 0) { |
635 | err = snd_pcm_stream_proc_init(pstr); | |
73e77ba0 TI |
636 | if (err < 0) { |
637 | snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n"); | |
1da177e4 | 638 | return err; |
73e77ba0 | 639 | } |
1da177e4 LT |
640 | } |
641 | prev = NULL; | |
642 | for (idx = 0, prev = NULL; idx < substream_count; idx++) { | |
ca2c0966 | 643 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 TI |
644 | if (substream == NULL) { |
645 | snd_printk(KERN_ERR "Cannot allocate PCM substream\n"); | |
1da177e4 | 646 | return -ENOMEM; |
73e77ba0 | 647 | } |
1da177e4 LT |
648 | substream->pcm = pcm; |
649 | substream->pstr = pstr; | |
650 | substream->number = idx; | |
651 | substream->stream = stream; | |
652 | sprintf(substream->name, "subdevice #%i", idx); | |
653 | substream->buffer_bytes_max = UINT_MAX; | |
654 | if (prev == NULL) | |
655 | pstr->substream = substream; | |
656 | else | |
657 | prev->next = substream; | |
658 | err = snd_pcm_substream_proc_init(substream); | |
659 | if (err < 0) { | |
73e77ba0 | 660 | snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n"); |
1da177e4 LT |
661 | kfree(substream); |
662 | return err; | |
663 | } | |
664 | substream->group = &substream->self_group; | |
665 | spin_lock_init(&substream->self_group.lock); | |
666 | INIT_LIST_HEAD(&substream->self_group.substreams); | |
667 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
668 | spin_lock_init(&substream->timer_lock); | |
669 | prev = substream; | |
670 | } | |
671 | return 0; | |
672 | } | |
673 | ||
674 | /** | |
675 | * snd_pcm_new - create a new PCM instance | |
676 | * @card: the card instance | |
677 | * @id: the id string | |
678 | * @device: the device index (zero based) | |
679 | * @playback_count: the number of substreams for playback | |
680 | * @capture_count: the number of substreams for capture | |
681 | * @rpcm: the pointer to store the new pcm instance | |
682 | * | |
683 | * Creates a new PCM instance. | |
684 | * | |
685 | * The pcm operators have to be set afterwards to the new instance | |
686 | * via snd_pcm_set_ops(). | |
687 | * | |
688 | * Returns zero if successful, or a negative error code on failure. | |
689 | */ | |
877211f5 | 690 | int snd_pcm_new(struct snd_card *card, char *id, int device, |
1da177e4 | 691 | int playback_count, int capture_count, |
877211f5 | 692 | struct snd_pcm ** rpcm) |
1da177e4 | 693 | { |
877211f5 | 694 | struct snd_pcm *pcm; |
1da177e4 | 695 | int err; |
877211f5 | 696 | static struct snd_device_ops ops = { |
1da177e4 LT |
697 | .dev_free = snd_pcm_dev_free, |
698 | .dev_register = snd_pcm_dev_register, | |
699 | .dev_disconnect = snd_pcm_dev_disconnect, | |
700 | .dev_unregister = snd_pcm_dev_unregister | |
701 | }; | |
702 | ||
703 | snd_assert(rpcm != NULL, return -EINVAL); | |
704 | *rpcm = NULL; | |
705 | snd_assert(card != NULL, return -ENXIO); | |
ca2c0966 | 706 | pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); |
73e77ba0 TI |
707 | if (pcm == NULL) { |
708 | snd_printk(KERN_ERR "Cannot allocate PCM\n"); | |
1da177e4 | 709 | return -ENOMEM; |
73e77ba0 | 710 | } |
1da177e4 LT |
711 | pcm->card = card; |
712 | pcm->device = device; | |
73e77ba0 | 713 | if (id) |
1da177e4 | 714 | strlcpy(pcm->id, id, sizeof(pcm->id)); |
1da177e4 LT |
715 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) { |
716 | snd_pcm_free(pcm); | |
717 | return err; | |
718 | } | |
719 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) { | |
720 | snd_pcm_free(pcm); | |
721 | return err; | |
722 | } | |
1a60d4c5 | 723 | mutex_init(&pcm->open_mutex); |
1da177e4 LT |
724 | init_waitqueue_head(&pcm->open_wait); |
725 | if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) { | |
726 | snd_pcm_free(pcm); | |
727 | return err; | |
728 | } | |
729 | *rpcm = pcm; | |
730 | return 0; | |
731 | } | |
732 | ||
877211f5 | 733 | static void snd_pcm_free_stream(struct snd_pcm_str * pstr) |
1da177e4 | 734 | { |
877211f5 | 735 | struct snd_pcm_substream *substream, *substream_next; |
1da177e4 | 736 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
877211f5 | 737 | struct snd_pcm_oss_setup *setup, *setupn; |
1da177e4 LT |
738 | #endif |
739 | substream = pstr->substream; | |
740 | while (substream) { | |
741 | substream_next = substream->next; | |
742 | snd_pcm_substream_proc_done(substream); | |
743 | kfree(substream); | |
744 | substream = substream_next; | |
745 | } | |
746 | snd_pcm_stream_proc_done(pstr); | |
747 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
748 | for (setup = pstr->oss.setup_list; setup; setup = setupn) { | |
749 | setupn = setup->next; | |
750 | kfree(setup->task_name); | |
751 | kfree(setup); | |
752 | } | |
753 | #endif | |
754 | } | |
755 | ||
877211f5 | 756 | static int snd_pcm_free(struct snd_pcm *pcm) |
1da177e4 LT |
757 | { |
758 | snd_assert(pcm != NULL, return -ENXIO); | |
759 | if (pcm->private_free) | |
760 | pcm->private_free(pcm); | |
761 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
762 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]); | |
763 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]); | |
764 | kfree(pcm); | |
765 | return 0; | |
766 | } | |
767 | ||
877211f5 | 768 | static int snd_pcm_dev_free(struct snd_device *device) |
1da177e4 | 769 | { |
877211f5 | 770 | struct snd_pcm *pcm = device->device_data; |
1da177e4 LT |
771 | return snd_pcm_free(pcm); |
772 | } | |
773 | ||
774 | static void snd_pcm_tick_timer_func(unsigned long data) | |
775 | { | |
877211f5 | 776 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *) data; |
1da177e4 LT |
777 | snd_pcm_tick_elapsed(substream); |
778 | } | |
779 | ||
3bf75f9b TI |
780 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, |
781 | struct file *file, | |
782 | struct snd_pcm_substream **rsubstream) | |
1da177e4 | 783 | { |
877211f5 TI |
784 | struct snd_pcm_str * pstr; |
785 | struct snd_pcm_substream *substream; | |
786 | struct snd_pcm_runtime *runtime; | |
787 | struct snd_ctl_file *kctl; | |
788 | struct snd_card *card; | |
1da177e4 LT |
789 | struct list_head *list; |
790 | int prefer_subdevice = -1; | |
791 | size_t size; | |
792 | ||
793 | snd_assert(rsubstream != NULL, return -EINVAL); | |
794 | *rsubstream = NULL; | |
795 | snd_assert(pcm != NULL, return -ENXIO); | |
796 | pstr = &pcm->streams[stream]; | |
3bf75f9b | 797 | if (pstr->substream == NULL || pstr->substream_count == 0) |
1da177e4 LT |
798 | return -ENODEV; |
799 | ||
800 | card = pcm->card; | |
801 | down_read(&card->controls_rwsem); | |
802 | list_for_each(list, &card->ctl_files) { | |
803 | kctl = snd_ctl_file(list); | |
804 | if (kctl->pid == current->pid) { | |
805 | prefer_subdevice = kctl->prefer_pcm_subdevice; | |
806 | break; | |
807 | } | |
808 | } | |
809 | up_read(&card->controls_rwsem); | |
810 | ||
1da177e4 LT |
811 | switch (stream) { |
812 | case SNDRV_PCM_STREAM_PLAYBACK: | |
813 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
814 | for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; substream; substream = substream->next) { | |
815 | if (SUBSTREAM_BUSY(substream)) | |
816 | return -EAGAIN; | |
817 | } | |
818 | } | |
819 | break; | |
820 | case SNDRV_PCM_STREAM_CAPTURE: | |
821 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
822 | for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next) { | |
823 | if (SUBSTREAM_BUSY(substream)) | |
824 | return -EAGAIN; | |
825 | } | |
826 | } | |
827 | break; | |
828 | default: | |
829 | return -EINVAL; | |
830 | } | |
831 | ||
832 | if (prefer_subdevice >= 0) { | |
833 | for (substream = pstr->substream; substream; substream = substream->next) | |
834 | if (!SUBSTREAM_BUSY(substream) && substream->number == prefer_subdevice) | |
835 | goto __ok; | |
836 | } | |
837 | for (substream = pstr->substream; substream; substream = substream->next) | |
838 | if (!SUBSTREAM_BUSY(substream)) | |
839 | break; | |
840 | __ok: | |
841 | if (substream == NULL) | |
842 | return -EAGAIN; | |
843 | ||
ca2c0966 | 844 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
1da177e4 LT |
845 | if (runtime == NULL) |
846 | return -ENOMEM; | |
847 | ||
877211f5 | 848 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)); |
1da177e4 LT |
849 | runtime->status = snd_malloc_pages(size, GFP_KERNEL); |
850 | if (runtime->status == NULL) { | |
851 | kfree(runtime); | |
852 | return -ENOMEM; | |
853 | } | |
854 | memset((void*)runtime->status, 0, size); | |
855 | ||
877211f5 | 856 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)); |
1da177e4 LT |
857 | runtime->control = snd_malloc_pages(size, GFP_KERNEL); |
858 | if (runtime->control == NULL) { | |
877211f5 TI |
859 | snd_free_pages((void*)runtime->status, |
860 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
1da177e4 LT |
861 | kfree(runtime); |
862 | return -ENOMEM; | |
863 | } | |
864 | memset((void*)runtime->control, 0, size); | |
865 | ||
866 | init_waitqueue_head(&runtime->sleep); | |
867 | atomic_set(&runtime->mmap_count, 0); | |
868 | init_timer(&runtime->tick_timer); | |
869 | runtime->tick_timer.function = snd_pcm_tick_timer_func; | |
870 | runtime->tick_timer.data = (unsigned long) substream; | |
871 | ||
872 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
873 | ||
874 | substream->runtime = runtime; | |
875 | substream->private_data = pcm->private_data; | |
3bf75f9b | 876 | substream->ffile = file; |
1da177e4 LT |
877 | pstr->substream_opened++; |
878 | *rsubstream = substream; | |
879 | return 0; | |
880 | } | |
881 | ||
3bf75f9b | 882 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream) |
1da177e4 | 883 | { |
877211f5 | 884 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
885 | substream->file = NULL; |
886 | runtime = substream->runtime; | |
887 | snd_assert(runtime != NULL, return); | |
888 | if (runtime->private_free != NULL) | |
889 | runtime->private_free(runtime); | |
877211f5 TI |
890 | snd_free_pages((void*)runtime->status, |
891 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
892 | snd_free_pages((void*)runtime->control, | |
893 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))); | |
1da177e4 LT |
894 | kfree(runtime->hw_constraints.rules); |
895 | kfree(runtime); | |
896 | substream->runtime = NULL; | |
897 | substream->pstr->substream_opened--; | |
898 | } | |
899 | ||
877211f5 | 900 | static int snd_pcm_dev_register(struct snd_device *device) |
1da177e4 | 901 | { |
f87135f5 | 902 | int cidx, err; |
877211f5 | 903 | struct snd_pcm_substream *substream; |
1da177e4 LT |
904 | struct list_head *list; |
905 | char str[16]; | |
877211f5 | 906 | struct snd_pcm *pcm = device->device_data; |
1da177e4 LT |
907 | |
908 | snd_assert(pcm != NULL && device != NULL, return -ENXIO); | |
1a60d4c5 | 909 | mutex_lock(®ister_mutex); |
f87135f5 | 910 | if (snd_pcm_search(pcm->card, pcm->device)) { |
1a60d4c5 | 911 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
912 | return -EBUSY; |
913 | } | |
f87135f5 | 914 | list_add_tail(&pcm->list, &snd_pcm_devices); |
1da177e4 LT |
915 | for (cidx = 0; cidx < 2; cidx++) { |
916 | int devtype = -1; | |
917 | if (pcm->streams[cidx].substream == NULL) | |
918 | continue; | |
919 | switch (cidx) { | |
920 | case SNDRV_PCM_STREAM_PLAYBACK: | |
921 | sprintf(str, "pcmC%iD%ip", pcm->card->number, pcm->device); | |
1da177e4 LT |
922 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
923 | break; | |
924 | case SNDRV_PCM_STREAM_CAPTURE: | |
925 | sprintf(str, "pcmC%iD%ic", pcm->card->number, pcm->device); | |
1da177e4 LT |
926 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
927 | break; | |
928 | } | |
2af677fc CL |
929 | if ((err = snd_register_device(devtype, pcm->card, |
930 | pcm->device, | |
f87135f5 CL |
931 | &snd_pcm_f_ops[cidx], |
932 | pcm, str)) < 0) | |
2af677fc | 933 | { |
f87135f5 | 934 | list_del(&pcm->list); |
1a60d4c5 | 935 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
936 | return err; |
937 | } | |
938 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) | |
939 | snd_pcm_timer_init(substream); | |
940 | } | |
941 | list_for_each(list, &snd_pcm_notify_list) { | |
877211f5 TI |
942 | struct snd_pcm_notify *notify; |
943 | notify = list_entry(list, struct snd_pcm_notify, list); | |
1da177e4 LT |
944 | notify->n_register(pcm); |
945 | } | |
1a60d4c5 | 946 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
947 | return 0; |
948 | } | |
949 | ||
877211f5 | 950 | static int snd_pcm_dev_disconnect(struct snd_device *device) |
1da177e4 | 951 | { |
877211f5 | 952 | struct snd_pcm *pcm = device->device_data; |
1da177e4 | 953 | struct list_head *list; |
877211f5 | 954 | struct snd_pcm_substream *substream; |
f87135f5 | 955 | int cidx; |
1da177e4 | 956 | |
1a60d4c5 | 957 | mutex_lock(®ister_mutex); |
f87135f5 | 958 | list_del_init(&pcm->list); |
1da177e4 LT |
959 | for (cidx = 0; cidx < 2; cidx++) |
960 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) | |
961 | if (substream->runtime) | |
962 | substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED; | |
963 | list_for_each(list, &snd_pcm_notify_list) { | |
877211f5 TI |
964 | struct snd_pcm_notify *notify; |
965 | notify = list_entry(list, struct snd_pcm_notify, list); | |
1da177e4 LT |
966 | notify->n_disconnect(pcm); |
967 | } | |
1a60d4c5 | 968 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
969 | return 0; |
970 | } | |
971 | ||
877211f5 | 972 | static int snd_pcm_dev_unregister(struct snd_device *device) |
1da177e4 | 973 | { |
f87135f5 | 974 | int cidx, devtype; |
877211f5 | 975 | struct snd_pcm_substream *substream; |
1da177e4 | 976 | struct list_head *list; |
877211f5 | 977 | struct snd_pcm *pcm = device->device_data; |
1da177e4 LT |
978 | |
979 | snd_assert(pcm != NULL, return -ENXIO); | |
1a60d4c5 | 980 | mutex_lock(®ister_mutex); |
f87135f5 | 981 | list_del(&pcm->list); |
1da177e4 LT |
982 | for (cidx = 0; cidx < 2; cidx++) { |
983 | devtype = -1; | |
984 | switch (cidx) { | |
985 | case SNDRV_PCM_STREAM_PLAYBACK: | |
986 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; | |
987 | break; | |
988 | case SNDRV_PCM_STREAM_CAPTURE: | |
989 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; | |
990 | break; | |
991 | } | |
992 | snd_unregister_device(devtype, pcm->card, pcm->device); | |
993 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) | |
994 | snd_pcm_timer_done(substream); | |
995 | } | |
996 | list_for_each(list, &snd_pcm_notify_list) { | |
877211f5 TI |
997 | struct snd_pcm_notify *notify; |
998 | notify = list_entry(list, struct snd_pcm_notify, list); | |
1da177e4 LT |
999 | notify->n_unregister(pcm); |
1000 | } | |
1a60d4c5 | 1001 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1002 | return snd_pcm_free(pcm); |
1003 | } | |
1004 | ||
877211f5 | 1005 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree) |
1da177e4 | 1006 | { |
f87135f5 | 1007 | struct list_head *p; |
1da177e4 LT |
1008 | |
1009 | snd_assert(notify != NULL && notify->n_register != NULL && notify->n_unregister != NULL, return -EINVAL); | |
1a60d4c5 | 1010 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1011 | if (nfree) { |
1012 | list_del(¬ify->list); | |
f87135f5 CL |
1013 | list_for_each(p, &snd_pcm_devices) |
1014 | notify->n_unregister(list_entry(p, | |
1015 | struct snd_pcm, list)); | |
1da177e4 LT |
1016 | } else { |
1017 | list_add_tail(¬ify->list, &snd_pcm_notify_list); | |
f87135f5 CL |
1018 | list_for_each(p, &snd_pcm_devices) |
1019 | notify->n_register(list_entry(p, struct snd_pcm, list)); | |
1da177e4 | 1020 | } |
1a60d4c5 | 1021 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1022 | return 0; |
1023 | } | |
1024 | ||
e28563cc | 1025 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1026 | /* |
1027 | * Info interface | |
1028 | */ | |
1029 | ||
877211f5 TI |
1030 | static void snd_pcm_proc_read(struct snd_info_entry *entry, |
1031 | struct snd_info_buffer *buffer) | |
1da177e4 | 1032 | { |
f87135f5 | 1033 | struct list_head *p; |
877211f5 | 1034 | struct snd_pcm *pcm; |
1da177e4 | 1035 | |
1a60d4c5 | 1036 | mutex_lock(®ister_mutex); |
f87135f5 CL |
1037 | list_for_each(p, &snd_pcm_devices) { |
1038 | pcm = list_entry(p, struct snd_pcm, list); | |
1039 | snd_iprintf(buffer, "%02i-%02i: %s : %s", | |
1040 | pcm->card->number, pcm->device, pcm->id, pcm->name); | |
1da177e4 | 1041 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) |
877211f5 TI |
1042 | snd_iprintf(buffer, " : playback %i", |
1043 | pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count); | |
1da177e4 | 1044 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) |
877211f5 TI |
1045 | snd_iprintf(buffer, " : capture %i", |
1046 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); | |
1da177e4 LT |
1047 | snd_iprintf(buffer, "\n"); |
1048 | } | |
1a60d4c5 | 1049 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1050 | } |
1051 | ||
877211f5 | 1052 | static struct snd_info_entry *snd_pcm_proc_entry = NULL; |
1da177e4 | 1053 | |
e28563cc | 1054 | static void snd_pcm_proc_init(void) |
1da177e4 | 1055 | { |
877211f5 | 1056 | struct snd_info_entry *entry; |
1da177e4 | 1057 | |
1da177e4 | 1058 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) { |
877211f5 TI |
1059 | snd_info_set_text_ops(entry, NULL, SNDRV_CARDS * SNDRV_PCM_DEVICES * 128, |
1060 | snd_pcm_proc_read); | |
1da177e4 LT |
1061 | if (snd_info_register(entry) < 0) { |
1062 | snd_info_free_entry(entry); | |
1063 | entry = NULL; | |
1064 | } | |
1065 | } | |
1066 | snd_pcm_proc_entry = entry; | |
e28563cc TI |
1067 | } |
1068 | ||
1069 | static void snd_pcm_proc_done(void) | |
1070 | { | |
1071 | if (snd_pcm_proc_entry) | |
1072 | snd_info_unregister(snd_pcm_proc_entry); | |
1073 | } | |
1074 | ||
1075 | #else /* !CONFIG_PROC_FS */ | |
1076 | #define snd_pcm_proc_init() | |
1077 | #define snd_pcm_proc_done() | |
1078 | #endif /* CONFIG_PROC_FS */ | |
1079 | ||
1080 | ||
1081 | /* | |
1082 | * ENTRY functions | |
1083 | */ | |
1084 | ||
1085 | static int __init alsa_pcm_init(void) | |
1086 | { | |
1087 | snd_ctl_register_ioctl(snd_pcm_control_ioctl); | |
1088 | snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl); | |
1089 | snd_pcm_proc_init(); | |
1da177e4 LT |
1090 | return 0; |
1091 | } | |
1092 | ||
1093 | static void __exit alsa_pcm_exit(void) | |
1094 | { | |
1095 | snd_ctl_unregister_ioctl(snd_pcm_control_ioctl); | |
1096 | snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl); | |
e28563cc | 1097 | snd_pcm_proc_done(); |
1da177e4 LT |
1098 | } |
1099 | ||
1100 | module_init(alsa_pcm_init) | |
1101 | module_exit(alsa_pcm_exit) | |
1102 | ||
1da177e4 LT |
1103 | EXPORT_SYMBOL(snd_pcm_new); |
1104 | EXPORT_SYMBOL(snd_pcm_new_stream); | |
1105 | EXPORT_SYMBOL(snd_pcm_notify); | |
1106 | EXPORT_SYMBOL(snd_pcm_open_substream); | |
1107 | EXPORT_SYMBOL(snd_pcm_release_substream); | |
1da177e4 LT |
1108 | /* pcm_native.c */ |
1109 | EXPORT_SYMBOL(snd_pcm_link_rwlock); | |
1da177e4 LT |
1110 | #ifdef CONFIG_PM |
1111 | EXPORT_SYMBOL(snd_pcm_suspend); | |
1112 | EXPORT_SYMBOL(snd_pcm_suspend_all); | |
1113 | #endif | |
1da177e4 LT |
1114 | EXPORT_SYMBOL(snd_pcm_kernel_ioctl); |
1115 | EXPORT_SYMBOL(snd_pcm_mmap_data); | |
1116 | #if SNDRV_PCM_INFO_MMAP_IOMEM | |
1117 | EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); | |
1118 | #endif | |
1119 | /* pcm_misc.c */ | |
1120 | EXPORT_SYMBOL(snd_pcm_format_signed); | |
1121 | EXPORT_SYMBOL(snd_pcm_format_unsigned); | |
1122 | EXPORT_SYMBOL(snd_pcm_format_linear); | |
1123 | EXPORT_SYMBOL(snd_pcm_format_little_endian); | |
1124 | EXPORT_SYMBOL(snd_pcm_format_big_endian); | |
1125 | EXPORT_SYMBOL(snd_pcm_format_width); | |
1126 | EXPORT_SYMBOL(snd_pcm_format_physical_width); | |
9502dcad | 1127 | EXPORT_SYMBOL(snd_pcm_format_size); |
1da177e4 LT |
1128 | EXPORT_SYMBOL(snd_pcm_format_silence_64); |
1129 | EXPORT_SYMBOL(snd_pcm_format_set_silence); | |
1130 | EXPORT_SYMBOL(snd_pcm_build_linear_format); | |
1131 | EXPORT_SYMBOL(snd_pcm_limit_hw_rates); |