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Commit | Line | Data |
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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); | |
1da177e4 | 45 | |
f87135f5 CL |
46 | static struct snd_pcm *snd_pcm_search(struct snd_card *card, int device) |
47 | { | |
48 | struct list_head *p; | |
49 | struct snd_pcm *pcm; | |
50 | ||
51 | list_for_each(p, &snd_pcm_devices) { | |
52 | pcm = list_entry(p, struct snd_pcm, list); | |
53 | if (pcm->card == card && pcm->device == device) | |
54 | return pcm; | |
55 | } | |
56 | return NULL; | |
57 | } | |
58 | ||
877211f5 TI |
59 | static int snd_pcm_control_ioctl(struct snd_card *card, |
60 | struct snd_ctl_file *control, | |
1da177e4 LT |
61 | unsigned int cmd, unsigned long arg) |
62 | { | |
1da177e4 LT |
63 | switch (cmd) { |
64 | case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE: | |
65 | { | |
66 | int device; | |
67 | ||
68 | if (get_user(device, (int __user *)arg)) | |
69 | return -EFAULT; | |
1a60d4c5 | 70 | mutex_lock(®ister_mutex); |
1da177e4 LT |
71 | device = device < 0 ? 0 : device + 1; |
72 | while (device < SNDRV_PCM_DEVICES) { | |
f87135f5 | 73 | if (snd_pcm_search(card, device)) |
1da177e4 LT |
74 | break; |
75 | device++; | |
76 | } | |
77 | if (device == SNDRV_PCM_DEVICES) | |
78 | device = -1; | |
1a60d4c5 | 79 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
80 | if (put_user(device, (int __user *)arg)) |
81 | return -EFAULT; | |
82 | return 0; | |
83 | } | |
84 | case SNDRV_CTL_IOCTL_PCM_INFO: | |
85 | { | |
877211f5 | 86 | struct snd_pcm_info __user *info; |
1da177e4 | 87 | unsigned int device, subdevice; |
877211f5 TI |
88 | int stream; |
89 | struct snd_pcm *pcm; | |
90 | struct snd_pcm_str *pstr; | |
91 | struct snd_pcm_substream *substream; | |
f87135f5 CL |
92 | int err; |
93 | ||
877211f5 | 94 | info = (struct snd_pcm_info __user *)arg; |
1da177e4 LT |
95 | if (get_user(device, &info->device)) |
96 | return -EFAULT; | |
1da177e4 LT |
97 | if (get_user(stream, &info->stream)) |
98 | return -EFAULT; | |
99 | if (stream < 0 || stream > 1) | |
100 | return -EINVAL; | |
1da177e4 LT |
101 | if (get_user(subdevice, &info->subdevice)) |
102 | return -EFAULT; | |
1a60d4c5 | 103 | mutex_lock(®ister_mutex); |
f87135f5 CL |
104 | pcm = snd_pcm_search(card, device); |
105 | if (pcm == NULL) { | |
106 | err = -ENXIO; | |
107 | goto _error; | |
108 | } | |
109 | pstr = &pcm->streams[stream]; | |
110 | if (pstr->substream_count == 0) { | |
111 | err = -ENOENT; | |
112 | goto _error; | |
113 | } | |
114 | if (subdevice >= pstr->substream_count) { | |
115 | err = -ENXIO; | |
116 | goto _error; | |
117 | } | |
118 | for (substream = pstr->substream; substream; | |
119 | substream = substream->next) | |
1da177e4 LT |
120 | if (substream->number == (int)subdevice) |
121 | break; | |
f87135f5 CL |
122 | if (substream == NULL) { |
123 | err = -ENXIO; | |
124 | goto _error; | |
125 | } | |
126 | err = snd_pcm_info_user(substream, info); | |
127 | _error: | |
1a60d4c5 | 128 | mutex_unlock(®ister_mutex); |
f87135f5 | 129 | return err; |
1da177e4 LT |
130 | } |
131 | case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE: | |
132 | { | |
133 | int val; | |
134 | ||
135 | if (get_user(val, (int __user *)arg)) | |
136 | return -EFAULT; | |
137 | control->prefer_pcm_subdevice = val; | |
138 | return 0; | |
139 | } | |
140 | } | |
141 | return -ENOIOCTLCMD; | |
142 | } | |
21a3479a | 143 | |
b7d90a35 | 144 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
21a3479a | 145 | |
1da177e4 LT |
146 | #define STATE(v) [SNDRV_PCM_STATE_##v] = #v |
147 | #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v | |
148 | #define READY(v) [SNDRV_PCM_READY_##v] = #v | |
149 | #define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v | |
150 | #define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v | |
151 | #define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v | |
152 | #define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v | |
153 | #define START(v) [SNDRV_PCM_START_##v] = #v | |
154 | #define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v | |
155 | #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v | |
156 | ||
1da177e4 LT |
157 | static char *snd_pcm_format_names[] = { |
158 | FORMAT(S8), | |
159 | FORMAT(U8), | |
160 | FORMAT(S16_LE), | |
161 | FORMAT(S16_BE), | |
162 | FORMAT(U16_LE), | |
163 | FORMAT(U16_BE), | |
164 | FORMAT(S24_LE), | |
165 | FORMAT(S24_BE), | |
166 | FORMAT(U24_LE), | |
167 | FORMAT(U24_BE), | |
168 | FORMAT(S32_LE), | |
169 | FORMAT(S32_BE), | |
170 | FORMAT(U32_LE), | |
171 | FORMAT(U32_BE), | |
172 | FORMAT(FLOAT_LE), | |
173 | FORMAT(FLOAT_BE), | |
174 | FORMAT(FLOAT64_LE), | |
175 | FORMAT(FLOAT64_BE), | |
176 | FORMAT(IEC958_SUBFRAME_LE), | |
177 | FORMAT(IEC958_SUBFRAME_BE), | |
178 | FORMAT(MU_LAW), | |
179 | FORMAT(A_LAW), | |
180 | FORMAT(IMA_ADPCM), | |
181 | FORMAT(MPEG), | |
182 | FORMAT(GSM), | |
183 | FORMAT(SPECIAL), | |
184 | FORMAT(S24_3LE), | |
185 | FORMAT(S24_3BE), | |
186 | FORMAT(U24_3LE), | |
187 | FORMAT(U24_3BE), | |
188 | FORMAT(S20_3LE), | |
189 | FORMAT(S20_3BE), | |
190 | FORMAT(U20_3LE), | |
191 | FORMAT(U20_3BE), | |
192 | FORMAT(S18_3LE), | |
193 | FORMAT(S18_3BE), | |
194 | FORMAT(U18_3LE), | |
195 | FORMAT(U18_3BE), | |
196 | }; | |
197 | ||
12831c15 | 198 | static const char *snd_pcm_format_name(snd_pcm_format_t format) |
e28563cc TI |
199 | { |
200 | return snd_pcm_format_names[format]; | |
201 | } | |
202 | ||
e28563cc TI |
203 | static char *snd_pcm_stream_names[] = { |
204 | STREAM(PLAYBACK), | |
205 | STREAM(CAPTURE), | |
206 | }; | |
207 | ||
208 | static char *snd_pcm_state_names[] = { | |
209 | STATE(OPEN), | |
210 | STATE(SETUP), | |
211 | STATE(PREPARED), | |
212 | STATE(RUNNING), | |
213 | STATE(XRUN), | |
214 | STATE(DRAINING), | |
215 | STATE(PAUSED), | |
216 | STATE(SUSPENDED), | |
217 | }; | |
218 | ||
219 | static char *snd_pcm_access_names[] = { | |
220 | ACCESS(MMAP_INTERLEAVED), | |
221 | ACCESS(MMAP_NONINTERLEAVED), | |
222 | ACCESS(MMAP_COMPLEX), | |
223 | ACCESS(RW_INTERLEAVED), | |
224 | ACCESS(RW_NONINTERLEAVED), | |
225 | }; | |
226 | ||
1da177e4 LT |
227 | static char *snd_pcm_subformat_names[] = { |
228 | SUBFORMAT(STD), | |
229 | }; | |
230 | ||
231 | static char *snd_pcm_tstamp_mode_names[] = { | |
232 | TSTAMP(NONE), | |
233 | TSTAMP(MMAP), | |
234 | }; | |
235 | ||
877211f5 | 236 | static const char *snd_pcm_stream_name(int stream) |
1da177e4 LT |
237 | { |
238 | snd_assert(stream <= SNDRV_PCM_STREAM_LAST, return NULL); | |
239 | return snd_pcm_stream_names[stream]; | |
240 | } | |
241 | ||
242 | static const char *snd_pcm_access_name(snd_pcm_access_t access) | |
243 | { | |
1da177e4 LT |
244 | return snd_pcm_access_names[access]; |
245 | } | |
246 | ||
1da177e4 LT |
247 | static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat) |
248 | { | |
1da177e4 LT |
249 | return snd_pcm_subformat_names[subformat]; |
250 | } | |
251 | ||
877211f5 | 252 | static const char *snd_pcm_tstamp_mode_name(int mode) |
1da177e4 LT |
253 | { |
254 | snd_assert(mode <= SNDRV_PCM_TSTAMP_LAST, return NULL); | |
255 | return snd_pcm_tstamp_mode_names[mode]; | |
256 | } | |
257 | ||
258 | static const char *snd_pcm_state_name(snd_pcm_state_t state) | |
259 | { | |
1da177e4 LT |
260 | return snd_pcm_state_names[state]; |
261 | } | |
262 | ||
263 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
264 | #include <linux/soundcard.h> | |
1a60d4c5 | 265 | |
1da177e4 LT |
266 | static const char *snd_pcm_oss_format_name(int format) |
267 | { | |
268 | switch (format) { | |
269 | case AFMT_MU_LAW: | |
270 | return "MU_LAW"; | |
271 | case AFMT_A_LAW: | |
272 | return "A_LAW"; | |
273 | case AFMT_IMA_ADPCM: | |
274 | return "IMA_ADPCM"; | |
275 | case AFMT_U8: | |
276 | return "U8"; | |
277 | case AFMT_S16_LE: | |
278 | return "S16_LE"; | |
279 | case AFMT_S16_BE: | |
280 | return "S16_BE"; | |
281 | case AFMT_S8: | |
282 | return "S8"; | |
283 | case AFMT_U16_LE: | |
284 | return "U16_LE"; | |
285 | case AFMT_U16_BE: | |
286 | return "U16_BE"; | |
287 | case AFMT_MPEG: | |
288 | return "MPEG"; | |
289 | default: | |
290 | return "unknown"; | |
291 | } | |
292 | } | |
293 | #endif | |
294 | ||
877211f5 TI |
295 | static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, |
296 | struct snd_info_buffer *buffer) | |
1da177e4 | 297 | { |
877211f5 | 298 | struct snd_pcm_info *info; |
1da177e4 LT |
299 | int err; |
300 | ||
7c22f1aa TI |
301 | if (! substream) |
302 | return; | |
1da177e4 LT |
303 | |
304 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
305 | if (! info) { | |
306 | printk(KERN_DEBUG "snd_pcm_proc_info_read: cannot malloc\n"); | |
307 | return; | |
308 | } | |
309 | ||
310 | err = snd_pcm_info(substream, info); | |
311 | if (err < 0) { | |
312 | snd_iprintf(buffer, "error %d\n", err); | |
313 | kfree(info); | |
314 | return; | |
315 | } | |
316 | snd_iprintf(buffer, "card: %d\n", info->card); | |
317 | snd_iprintf(buffer, "device: %d\n", info->device); | |
318 | snd_iprintf(buffer, "subdevice: %d\n", info->subdevice); | |
319 | snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream)); | |
320 | snd_iprintf(buffer, "id: %s\n", info->id); | |
321 | snd_iprintf(buffer, "name: %s\n", info->name); | |
322 | snd_iprintf(buffer, "subname: %s\n", info->subname); | |
323 | snd_iprintf(buffer, "class: %d\n", info->dev_class); | |
324 | snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); | |
325 | snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); | |
326 | snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); | |
327 | kfree(info); | |
328 | } | |
329 | ||
877211f5 TI |
330 | static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry, |
331 | struct snd_info_buffer *buffer) | |
1da177e4 | 332 | { |
877211f5 TI |
333 | snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream, |
334 | buffer); | |
1da177e4 LT |
335 | } |
336 | ||
877211f5 TI |
337 | static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry, |
338 | struct snd_info_buffer *buffer) | |
1da177e4 | 339 | { |
877211f5 TI |
340 | snd_pcm_proc_info_read((struct snd_pcm_substream *)entry->private_data, |
341 | buffer); | |
1da177e4 LT |
342 | } |
343 | ||
877211f5 TI |
344 | static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry, |
345 | struct snd_info_buffer *buffer) | |
1da177e4 | 346 | { |
877211f5 TI |
347 | struct snd_pcm_substream *substream = entry->private_data; |
348 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
349 | if (!runtime) { |
350 | snd_iprintf(buffer, "closed\n"); | |
351 | return; | |
352 | } | |
1da177e4 LT |
353 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
354 | snd_iprintf(buffer, "no setup\n"); | |
1da177e4 LT |
355 | return; |
356 | } | |
357 | snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); | |
358 | snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); | |
359 | snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat)); | |
360 | snd_iprintf(buffer, "channels: %u\n", runtime->channels); | |
361 | snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den); | |
362 | snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size); | |
363 | snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size); | |
364 | snd_iprintf(buffer, "tick_time: %u\n", runtime->tick_time); | |
365 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
366 | if (substream->oss.oss) { | |
367 | snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format)); | |
368 | snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels); | |
369 | snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate); | |
370 | snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes); | |
371 | snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods); | |
372 | snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); | |
373 | } | |
374 | #endif | |
1da177e4 LT |
375 | } |
376 | ||
877211f5 TI |
377 | static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, |
378 | struct snd_info_buffer *buffer) | |
1da177e4 | 379 | { |
877211f5 TI |
380 | struct snd_pcm_substream *substream = entry->private_data; |
381 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
382 | if (!runtime) { |
383 | snd_iprintf(buffer, "closed\n"); | |
384 | return; | |
385 | } | |
1da177e4 LT |
386 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
387 | snd_iprintf(buffer, "no setup\n"); | |
1da177e4 LT |
388 | return; |
389 | } | |
390 | snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); | |
391 | snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); | |
392 | snd_iprintf(buffer, "sleep_min: %u\n", runtime->sleep_min); | |
393 | snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min); | |
394 | snd_iprintf(buffer, "xfer_align: %lu\n", runtime->xfer_align); | |
395 | snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold); | |
396 | snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold); | |
397 | snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); | |
398 | snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); | |
399 | snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); | |
1da177e4 LT |
400 | } |
401 | ||
877211f5 TI |
402 | static void snd_pcm_substream_proc_status_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; | |
407 | struct snd_pcm_status status; | |
1da177e4 LT |
408 | int err; |
409 | if (!runtime) { | |
410 | snd_iprintf(buffer, "closed\n"); | |
411 | return; | |
412 | } | |
413 | memset(&status, 0, sizeof(status)); | |
414 | err = snd_pcm_status(substream, &status); | |
415 | if (err < 0) { | |
416 | snd_iprintf(buffer, "error %d\n", err); | |
417 | return; | |
418 | } | |
419 | snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); | |
420 | snd_iprintf(buffer, "trigger_time: %ld.%09ld\n", | |
421 | status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec); | |
422 | snd_iprintf(buffer, "tstamp : %ld.%09ld\n", | |
423 | status.tstamp.tv_sec, status.tstamp.tv_nsec); | |
424 | snd_iprintf(buffer, "delay : %ld\n", status.delay); | |
425 | snd_iprintf(buffer, "avail : %ld\n", status.avail); | |
426 | snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max); | |
427 | snd_iprintf(buffer, "-----\n"); | |
428 | snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); | |
429 | snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); | |
430 | } | |
1da177e4 | 431 | |
61fb63c0 | 432 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
877211f5 TI |
433 | static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry, |
434 | struct snd_info_buffer *buffer) | |
1da177e4 | 435 | { |
877211f5 | 436 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
437 | snd_iprintf(buffer, "%d\n", pstr->xrun_debug); |
438 | } | |
439 | ||
877211f5 TI |
440 | static void snd_pcm_xrun_debug_write(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 | char line[64]; |
445 | if (!snd_info_get_line(buffer, line, sizeof(line))) | |
446 | pstr->xrun_debug = simple_strtoul(line, NULL, 10); | |
447 | } | |
448 | #endif | |
449 | ||
877211f5 | 450 | static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) |
1da177e4 | 451 | { |
877211f5 TI |
452 | struct snd_pcm *pcm = pstr->pcm; |
453 | struct snd_info_entry *entry; | |
1da177e4 LT |
454 | char name[16]; |
455 | ||
456 | sprintf(name, "pcm%i%c", pcm->device, | |
457 | pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); | |
458 | if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL) | |
459 | return -ENOMEM; | |
460 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
461 | if (snd_info_register(entry) < 0) { | |
462 | snd_info_free_entry(entry); | |
463 | return -ENOMEM; | |
464 | } | |
465 | pstr->proc_root = entry; | |
466 | ||
467 | if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) { | |
bf850204 | 468 | snd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read); |
1da177e4 LT |
469 | if (snd_info_register(entry) < 0) { |
470 | snd_info_free_entry(entry); | |
471 | entry = NULL; | |
472 | } | |
473 | } | |
474 | pstr->proc_info_entry = entry; | |
475 | ||
61fb63c0 | 476 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
877211f5 TI |
477 | if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug", |
478 | pstr->proc_root)) != NULL) { | |
1da177e4 | 479 | entry->c.text.read = snd_pcm_xrun_debug_read; |
1da177e4 | 480 | entry->c.text.write = snd_pcm_xrun_debug_write; |
bd7bf042 | 481 | entry->mode |= S_IWUSR; |
1da177e4 LT |
482 | entry->private_data = pstr; |
483 | if (snd_info_register(entry) < 0) { | |
484 | snd_info_free_entry(entry); | |
485 | entry = NULL; | |
486 | } | |
487 | } | |
488 | pstr->proc_xrun_debug_entry = entry; | |
489 | #endif | |
490 | return 0; | |
491 | } | |
492 | ||
877211f5 | 493 | static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) |
1da177e4 | 494 | { |
61fb63c0 | 495 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
746d4a02 TI |
496 | snd_info_free_entry(pstr->proc_xrun_debug_entry); |
497 | pstr->proc_xrun_debug_entry = NULL; | |
1da177e4 | 498 | #endif |
746d4a02 TI |
499 | snd_info_free_entry(pstr->proc_info_entry); |
500 | pstr->proc_info_entry = NULL; | |
501 | snd_info_free_entry(pstr->proc_root); | |
502 | pstr->proc_root = NULL; | |
1da177e4 LT |
503 | return 0; |
504 | } | |
505 | ||
877211f5 | 506 | static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) |
1da177e4 | 507 | { |
877211f5 TI |
508 | struct snd_info_entry *entry; |
509 | struct snd_card *card; | |
1da177e4 LT |
510 | char name[16]; |
511 | ||
512 | card = substream->pcm->card; | |
513 | ||
514 | sprintf(name, "sub%i", substream->number); | |
515 | if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL) | |
516 | return -ENOMEM; | |
517 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
518 | if (snd_info_register(entry) < 0) { | |
519 | snd_info_free_entry(entry); | |
520 | return -ENOMEM; | |
521 | } | |
522 | substream->proc_root = entry; | |
523 | ||
524 | if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) { | |
bf850204 TI |
525 | snd_info_set_text_ops(entry, substream, |
526 | snd_pcm_substream_proc_info_read); | |
1da177e4 LT |
527 | if (snd_info_register(entry) < 0) { |
528 | snd_info_free_entry(entry); | |
529 | entry = NULL; | |
530 | } | |
531 | } | |
532 | substream->proc_info_entry = entry; | |
533 | ||
534 | if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
535 | snd_info_set_text_ops(entry, substream, |
536 | snd_pcm_substream_proc_hw_params_read); | |
1da177e4 LT |
537 | if (snd_info_register(entry) < 0) { |
538 | snd_info_free_entry(entry); | |
539 | entry = NULL; | |
540 | } | |
541 | } | |
542 | substream->proc_hw_params_entry = entry; | |
543 | ||
544 | if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
545 | snd_info_set_text_ops(entry, substream, |
546 | snd_pcm_substream_proc_sw_params_read); | |
1da177e4 LT |
547 | if (snd_info_register(entry) < 0) { |
548 | snd_info_free_entry(entry); | |
549 | entry = NULL; | |
550 | } | |
551 | } | |
552 | substream->proc_sw_params_entry = entry; | |
553 | ||
554 | if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) { | |
bf850204 TI |
555 | snd_info_set_text_ops(entry, substream, |
556 | snd_pcm_substream_proc_status_read); | |
1da177e4 LT |
557 | if (snd_info_register(entry) < 0) { |
558 | snd_info_free_entry(entry); | |
559 | entry = NULL; | |
560 | } | |
561 | } | |
562 | substream->proc_status_entry = entry; | |
563 | ||
564 | return 0; | |
565 | } | |
746d4a02 | 566 | |
877211f5 | 567 | static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) |
1da177e4 | 568 | { |
746d4a02 TI |
569 | snd_info_free_entry(substream->proc_info_entry); |
570 | substream->proc_info_entry = NULL; | |
571 | snd_info_free_entry(substream->proc_hw_params_entry); | |
572 | substream->proc_hw_params_entry = NULL; | |
573 | snd_info_free_entry(substream->proc_sw_params_entry); | |
574 | substream->proc_sw_params_entry = NULL; | |
575 | snd_info_free_entry(substream->proc_status_entry); | |
576 | substream->proc_status_entry = NULL; | |
577 | snd_info_free_entry(substream->proc_root); | |
578 | substream->proc_root = NULL; | |
1da177e4 LT |
579 | return 0; |
580 | } | |
b7d90a35 | 581 | #else /* !CONFIG_SND_VERBOSE_PROCFS */ |
e28563cc TI |
582 | static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; } |
583 | static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; } | |
584 | static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; } | |
585 | static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; } | |
b7d90a35 | 586 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
1da177e4 LT |
587 | |
588 | /** | |
589 | * snd_pcm_new_stream - create a new PCM stream | |
590 | * @pcm: the pcm instance | |
591 | * @stream: the stream direction, SNDRV_PCM_STREAM_XXX | |
592 | * @substream_count: the number of substreams | |
593 | * | |
594 | * Creates a new stream for the pcm. | |
595 | * The corresponding stream on the pcm must have been empty before | |
596 | * calling this, i.e. zero must be given to the argument of | |
597 | * snd_pcm_new(). | |
598 | * | |
599 | * Returns zero if successful, or a negative error code on failure. | |
600 | */ | |
877211f5 | 601 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count) |
1da177e4 LT |
602 | { |
603 | int idx, err; | |
877211f5 TI |
604 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
605 | struct snd_pcm_substream *substream, *prev; | |
1da177e4 LT |
606 | |
607 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
1a60d4c5 | 608 | mutex_init(&pstr->oss.setup_mutex); |
1da177e4 LT |
609 | #endif |
610 | pstr->stream = stream; | |
611 | pstr->pcm = pcm; | |
612 | pstr->substream_count = substream_count; | |
1da177e4 LT |
613 | if (substream_count > 0) { |
614 | err = snd_pcm_stream_proc_init(pstr); | |
73e77ba0 TI |
615 | if (err < 0) { |
616 | snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n"); | |
1da177e4 | 617 | return err; |
73e77ba0 | 618 | } |
1da177e4 LT |
619 | } |
620 | prev = NULL; | |
621 | for (idx = 0, prev = NULL; idx < substream_count; idx++) { | |
ca2c0966 | 622 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 TI |
623 | if (substream == NULL) { |
624 | snd_printk(KERN_ERR "Cannot allocate PCM substream\n"); | |
1da177e4 | 625 | return -ENOMEM; |
73e77ba0 | 626 | } |
1da177e4 LT |
627 | substream->pcm = pcm; |
628 | substream->pstr = pstr; | |
629 | substream->number = idx; | |
630 | substream->stream = stream; | |
631 | sprintf(substream->name, "subdevice #%i", idx); | |
9442e691 TI |
632 | snprintf(substream->latency_id, sizeof(substream->latency_id), |
633 | "ALSA-PCM%d-%d%c%d", pcm->card->number, pcm->device, | |
634 | (stream ? 'c' : 'p'), idx); | |
1da177e4 LT |
635 | substream->buffer_bytes_max = UINT_MAX; |
636 | if (prev == NULL) | |
637 | pstr->substream = substream; | |
638 | else | |
639 | prev->next = substream; | |
640 | err = snd_pcm_substream_proc_init(substream); | |
641 | if (err < 0) { | |
73e77ba0 | 642 | snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n"); |
4d361285 AM |
643 | if (prev == NULL) |
644 | pstr->substream = NULL; | |
645 | else | |
646 | prev->next = NULL; | |
1da177e4 LT |
647 | kfree(substream); |
648 | return err; | |
649 | } | |
650 | substream->group = &substream->self_group; | |
651 | spin_lock_init(&substream->self_group.lock); | |
652 | INIT_LIST_HEAD(&substream->self_group.substreams); | |
653 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
654 | spin_lock_init(&substream->timer_lock); | |
9c323fcb | 655 | atomic_set(&substream->mmap_count, 0); |
1da177e4 LT |
656 | prev = substream; |
657 | } | |
658 | return 0; | |
659 | } | |
660 | ||
e88e8ae6 TI |
661 | EXPORT_SYMBOL(snd_pcm_new_stream); |
662 | ||
1da177e4 LT |
663 | /** |
664 | * snd_pcm_new - create a new PCM instance | |
665 | * @card: the card instance | |
666 | * @id: the id string | |
667 | * @device: the device index (zero based) | |
668 | * @playback_count: the number of substreams for playback | |
669 | * @capture_count: the number of substreams for capture | |
670 | * @rpcm: the pointer to store the new pcm instance | |
671 | * | |
672 | * Creates a new PCM instance. | |
673 | * | |
674 | * The pcm operators have to be set afterwards to the new instance | |
675 | * via snd_pcm_set_ops(). | |
676 | * | |
677 | * Returns zero if successful, or a negative error code on failure. | |
678 | */ | |
877211f5 | 679 | int snd_pcm_new(struct snd_card *card, char *id, int device, |
1da177e4 | 680 | int playback_count, int capture_count, |
877211f5 | 681 | struct snd_pcm ** rpcm) |
1da177e4 | 682 | { |
877211f5 | 683 | struct snd_pcm *pcm; |
1da177e4 | 684 | int err; |
877211f5 | 685 | static struct snd_device_ops ops = { |
1da177e4 LT |
686 | .dev_free = snd_pcm_dev_free, |
687 | .dev_register = snd_pcm_dev_register, | |
688 | .dev_disconnect = snd_pcm_dev_disconnect, | |
1da177e4 LT |
689 | }; |
690 | ||
691 | snd_assert(rpcm != NULL, return -EINVAL); | |
692 | *rpcm = NULL; | |
693 | snd_assert(card != NULL, return -ENXIO); | |
ca2c0966 | 694 | pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); |
73e77ba0 TI |
695 | if (pcm == NULL) { |
696 | snd_printk(KERN_ERR "Cannot allocate PCM\n"); | |
1da177e4 | 697 | return -ENOMEM; |
73e77ba0 | 698 | } |
1da177e4 LT |
699 | pcm->card = card; |
700 | pcm->device = device; | |
73e77ba0 | 701 | if (id) |
1da177e4 | 702 | strlcpy(pcm->id, id, sizeof(pcm->id)); |
1da177e4 LT |
703 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) { |
704 | snd_pcm_free(pcm); | |
705 | return err; | |
706 | } | |
707 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) { | |
708 | snd_pcm_free(pcm); | |
709 | return err; | |
710 | } | |
1a60d4c5 | 711 | mutex_init(&pcm->open_mutex); |
1da177e4 LT |
712 | init_waitqueue_head(&pcm->open_wait); |
713 | if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) { | |
714 | snd_pcm_free(pcm); | |
715 | return err; | |
716 | } | |
717 | *rpcm = pcm; | |
718 | return 0; | |
719 | } | |
720 | ||
e88e8ae6 TI |
721 | EXPORT_SYMBOL(snd_pcm_new); |
722 | ||
877211f5 | 723 | static void snd_pcm_free_stream(struct snd_pcm_str * pstr) |
1da177e4 | 724 | { |
877211f5 | 725 | struct snd_pcm_substream *substream, *substream_next; |
1da177e4 | 726 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
877211f5 | 727 | struct snd_pcm_oss_setup *setup, *setupn; |
1da177e4 LT |
728 | #endif |
729 | substream = pstr->substream; | |
730 | while (substream) { | |
731 | substream_next = substream->next; | |
c461482c | 732 | snd_pcm_timer_done(substream); |
1da177e4 LT |
733 | snd_pcm_substream_proc_done(substream); |
734 | kfree(substream); | |
735 | substream = substream_next; | |
736 | } | |
737 | snd_pcm_stream_proc_done(pstr); | |
738 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
739 | for (setup = pstr->oss.setup_list; setup; setup = setupn) { | |
740 | setupn = setup->next; | |
741 | kfree(setup->task_name); | |
742 | kfree(setup); | |
743 | } | |
744 | #endif | |
745 | } | |
746 | ||
877211f5 | 747 | static int snd_pcm_free(struct snd_pcm *pcm) |
1da177e4 | 748 | { |
c461482c TI |
749 | struct snd_pcm_notify *notify; |
750 | ||
1da177e4 | 751 | snd_assert(pcm != NULL, return -ENXIO); |
c461482c TI |
752 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
753 | notify->n_unregister(pcm); | |
754 | } | |
1da177e4 LT |
755 | if (pcm->private_free) |
756 | pcm->private_free(pcm); | |
757 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
758 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]); | |
759 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]); | |
760 | kfree(pcm); | |
761 | return 0; | |
762 | } | |
763 | ||
877211f5 | 764 | static int snd_pcm_dev_free(struct snd_device *device) |
1da177e4 | 765 | { |
877211f5 | 766 | struct snd_pcm *pcm = device->device_data; |
1da177e4 LT |
767 | return snd_pcm_free(pcm); |
768 | } | |
769 | ||
770 | static void snd_pcm_tick_timer_func(unsigned long data) | |
771 | { | |
877211f5 | 772 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *) data; |
1da177e4 LT |
773 | snd_pcm_tick_elapsed(substream); |
774 | } | |
775 | ||
3bf75f9b TI |
776 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, |
777 | struct file *file, | |
778 | struct snd_pcm_substream **rsubstream) | |
1da177e4 | 779 | { |
877211f5 TI |
780 | struct snd_pcm_str * pstr; |
781 | struct snd_pcm_substream *substream; | |
782 | struct snd_pcm_runtime *runtime; | |
783 | struct snd_ctl_file *kctl; | |
784 | struct snd_card *card; | |
1da177e4 LT |
785 | struct list_head *list; |
786 | int prefer_subdevice = -1; | |
787 | size_t size; | |
788 | ||
789 | snd_assert(rsubstream != NULL, return -EINVAL); | |
790 | *rsubstream = NULL; | |
791 | snd_assert(pcm != NULL, return -ENXIO); | |
792 | pstr = &pcm->streams[stream]; | |
3bf75f9b | 793 | if (pstr->substream == NULL || pstr->substream_count == 0) |
1da177e4 LT |
794 | return -ENODEV; |
795 | ||
796 | card = pcm->card; | |
797 | down_read(&card->controls_rwsem); | |
798 | list_for_each(list, &card->ctl_files) { | |
799 | kctl = snd_ctl_file(list); | |
800 | if (kctl->pid == current->pid) { | |
801 | prefer_subdevice = kctl->prefer_pcm_subdevice; | |
2529bba7 TI |
802 | if (prefer_subdevice != -1) |
803 | break; | |
1da177e4 LT |
804 | } |
805 | } | |
806 | up_read(&card->controls_rwsem); | |
807 | ||
1da177e4 LT |
808 | switch (stream) { |
809 | case SNDRV_PCM_STREAM_PLAYBACK: | |
810 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
811 | for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; substream; substream = substream->next) { | |
812 | if (SUBSTREAM_BUSY(substream)) | |
813 | return -EAGAIN; | |
814 | } | |
815 | } | |
816 | break; | |
817 | case SNDRV_PCM_STREAM_CAPTURE: | |
818 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
819 | for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next) { | |
820 | if (SUBSTREAM_BUSY(substream)) | |
821 | return -EAGAIN; | |
822 | } | |
823 | } | |
824 | break; | |
825 | default: | |
826 | return -EINVAL; | |
827 | } | |
828 | ||
0df63e44 TI |
829 | if (file->f_flags & O_APPEND) { |
830 | if (prefer_subdevice < 0) { | |
831 | if (pstr->substream_count > 1) | |
832 | return -EINVAL; /* must be unique */ | |
833 | substream = pstr->substream; | |
834 | } else { | |
835 | for (substream = pstr->substream; substream; | |
836 | substream = substream->next) | |
837 | if (substream->number == prefer_subdevice) | |
838 | break; | |
839 | } | |
840 | if (! substream) | |
841 | return -ENODEV; | |
842 | if (! SUBSTREAM_BUSY(substream)) | |
843 | return -EBADFD; | |
844 | substream->ref_count++; | |
845 | *rsubstream = substream; | |
846 | return 0; | |
847 | } | |
848 | ||
1da177e4 LT |
849 | if (prefer_subdevice >= 0) { |
850 | for (substream = pstr->substream; substream; substream = substream->next) | |
851 | if (!SUBSTREAM_BUSY(substream) && substream->number == prefer_subdevice) | |
852 | goto __ok; | |
853 | } | |
854 | for (substream = pstr->substream; substream; substream = substream->next) | |
855 | if (!SUBSTREAM_BUSY(substream)) | |
856 | break; | |
857 | __ok: | |
858 | if (substream == NULL) | |
859 | return -EAGAIN; | |
860 | ||
ca2c0966 | 861 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
1da177e4 LT |
862 | if (runtime == NULL) |
863 | return -ENOMEM; | |
864 | ||
877211f5 | 865 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)); |
1da177e4 LT |
866 | runtime->status = snd_malloc_pages(size, GFP_KERNEL); |
867 | if (runtime->status == NULL) { | |
868 | kfree(runtime); | |
869 | return -ENOMEM; | |
870 | } | |
871 | memset((void*)runtime->status, 0, size); | |
872 | ||
877211f5 | 873 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)); |
1da177e4 LT |
874 | runtime->control = snd_malloc_pages(size, GFP_KERNEL); |
875 | if (runtime->control == NULL) { | |
877211f5 TI |
876 | snd_free_pages((void*)runtime->status, |
877 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
1da177e4 LT |
878 | kfree(runtime); |
879 | return -ENOMEM; | |
880 | } | |
881 | memset((void*)runtime->control, 0, size); | |
882 | ||
883 | init_waitqueue_head(&runtime->sleep); | |
1da177e4 LT |
884 | init_timer(&runtime->tick_timer); |
885 | runtime->tick_timer.function = snd_pcm_tick_timer_func; | |
886 | runtime->tick_timer.data = (unsigned long) substream; | |
887 | ||
888 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
889 | ||
890 | substream->runtime = runtime; | |
891 | substream->private_data = pcm->private_data; | |
0df63e44 TI |
892 | substream->ref_count = 1; |
893 | substream->f_flags = file->f_flags; | |
1da177e4 LT |
894 | pstr->substream_opened++; |
895 | *rsubstream = substream; | |
896 | return 0; | |
897 | } | |
898 | ||
3bf75f9b | 899 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream) |
1da177e4 | 900 | { |
877211f5 | 901 | struct snd_pcm_runtime *runtime; |
0df63e44 | 902 | |
1da177e4 LT |
903 | runtime = substream->runtime; |
904 | snd_assert(runtime != NULL, return); | |
905 | if (runtime->private_free != NULL) | |
906 | runtime->private_free(runtime); | |
877211f5 TI |
907 | snd_free_pages((void*)runtime->status, |
908 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
909 | snd_free_pages((void*)runtime->control, | |
910 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))); | |
1da177e4 LT |
911 | kfree(runtime->hw_constraints.rules); |
912 | kfree(runtime); | |
913 | substream->runtime = NULL; | |
914 | substream->pstr->substream_opened--; | |
915 | } | |
916 | ||
d80f19fa GKH |
917 | static ssize_t show_pcm_class(struct device *dev, |
918 | struct device_attribute *attr, char *buf) | |
9d19f48c TI |
919 | { |
920 | struct snd_pcm *pcm; | |
921 | const char *str; | |
922 | static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = { | |
923 | [SNDRV_PCM_CLASS_GENERIC] = "generic", | |
924 | [SNDRV_PCM_CLASS_MULTI] = "multi", | |
925 | [SNDRV_PCM_CLASS_MODEM] = "modem", | |
926 | [SNDRV_PCM_CLASS_DIGITIZER] = "digitizer", | |
927 | }; | |
928 | ||
d80f19fa | 929 | if (! (pcm = dev_get_drvdata(dev)) || |
9d19f48c TI |
930 | pcm->dev_class > SNDRV_PCM_CLASS_LAST) |
931 | str = "none"; | |
932 | else | |
933 | str = strs[pcm->dev_class]; | |
934 | return snprintf(buf, PAGE_SIZE, "%s\n", str); | |
935 | } | |
936 | ||
d80f19fa | 937 | static struct device_attribute pcm_attrs = |
9d19f48c TI |
938 | __ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL); |
939 | ||
877211f5 | 940 | static int snd_pcm_dev_register(struct snd_device *device) |
1da177e4 | 941 | { |
f87135f5 | 942 | int cidx, err; |
877211f5 | 943 | struct snd_pcm_substream *substream; |
1da177e4 LT |
944 | struct list_head *list; |
945 | char str[16]; | |
877211f5 | 946 | struct snd_pcm *pcm = device->device_data; |
c78085fc | 947 | struct device *dev; |
1da177e4 LT |
948 | |
949 | snd_assert(pcm != NULL && device != NULL, return -ENXIO); | |
1a60d4c5 | 950 | mutex_lock(®ister_mutex); |
f87135f5 | 951 | if (snd_pcm_search(pcm->card, pcm->device)) { |
1a60d4c5 | 952 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
953 | return -EBUSY; |
954 | } | |
f87135f5 | 955 | list_add_tail(&pcm->list, &snd_pcm_devices); |
1da177e4 LT |
956 | for (cidx = 0; cidx < 2; cidx++) { |
957 | int devtype = -1; | |
958 | if (pcm->streams[cidx].substream == NULL) | |
959 | continue; | |
960 | switch (cidx) { | |
961 | case SNDRV_PCM_STREAM_PLAYBACK: | |
962 | sprintf(str, "pcmC%iD%ip", pcm->card->number, pcm->device); | |
1da177e4 LT |
963 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
964 | break; | |
965 | case SNDRV_PCM_STREAM_CAPTURE: | |
966 | sprintf(str, "pcmC%iD%ic", pcm->card->number, pcm->device); | |
1da177e4 LT |
967 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
968 | break; | |
969 | } | |
c78085fc JB |
970 | /* device pointer to use, pcm->dev takes precedence if |
971 | * it is assigned, otherwise fall back to card's device | |
972 | * if possible */ | |
973 | dev = pcm->dev; | |
974 | if (!dev) | |
975 | dev = pcm->card ? pcm->card->dev : NULL; | |
976 | /* register pcm */ | |
977 | err = snd_register_device_for_dev(devtype, pcm->card, | |
978 | pcm->device, | |
979 | &snd_pcm_f_ops[cidx], | |
980 | pcm, str, dev); | |
981 | if (err < 0) { | |
f87135f5 | 982 | list_del(&pcm->list); |
1a60d4c5 | 983 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
984 | return err; |
985 | } | |
9d19f48c TI |
986 | snd_add_device_sysfs_file(devtype, pcm->card, pcm->device, |
987 | &pcm_attrs); | |
1da177e4 LT |
988 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
989 | snd_pcm_timer_init(substream); | |
990 | } | |
991 | list_for_each(list, &snd_pcm_notify_list) { | |
877211f5 TI |
992 | struct snd_pcm_notify *notify; |
993 | notify = list_entry(list, struct snd_pcm_notify, list); | |
1da177e4 LT |
994 | notify->n_register(pcm); |
995 | } | |
1a60d4c5 | 996 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
997 | return 0; |
998 | } | |
999 | ||
877211f5 | 1000 | static int snd_pcm_dev_disconnect(struct snd_device *device) |
1da177e4 | 1001 | { |
877211f5 | 1002 | struct snd_pcm *pcm = device->device_data; |
c461482c | 1003 | struct snd_pcm_notify *notify; |
877211f5 | 1004 | struct snd_pcm_substream *substream; |
c461482c | 1005 | int cidx, devtype; |
1da177e4 | 1006 | |
1a60d4c5 | 1007 | mutex_lock(®ister_mutex); |
c461482c TI |
1008 | if (list_empty(&pcm->list)) |
1009 | goto unlock; | |
1010 | ||
f87135f5 | 1011 | list_del_init(&pcm->list); |
1da177e4 LT |
1012 | for (cidx = 0; cidx < 2; cidx++) |
1013 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) | |
1014 | if (substream->runtime) | |
1015 | substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED; | |
c461482c | 1016 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
1da177e4 LT |
1017 | notify->n_disconnect(pcm); |
1018 | } | |
1da177e4 LT |
1019 | for (cidx = 0; cidx < 2; cidx++) { |
1020 | devtype = -1; | |
1021 | switch (cidx) { | |
1022 | case SNDRV_PCM_STREAM_PLAYBACK: | |
1023 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; | |
1024 | break; | |
1025 | case SNDRV_PCM_STREAM_CAPTURE: | |
1026 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; | |
1027 | break; | |
1028 | } | |
1029 | snd_unregister_device(devtype, pcm->card, pcm->device); | |
1da177e4 | 1030 | } |
c461482c | 1031 | unlock: |
1a60d4c5 | 1032 | mutex_unlock(®ister_mutex); |
c461482c | 1033 | return 0; |
1da177e4 LT |
1034 | } |
1035 | ||
877211f5 | 1036 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree) |
1da177e4 | 1037 | { |
f87135f5 | 1038 | struct list_head *p; |
1da177e4 | 1039 | |
c461482c TI |
1040 | snd_assert(notify != NULL && |
1041 | notify->n_register != NULL && | |
1042 | notify->n_unregister != NULL && | |
1043 | notify->n_disconnect, return -EINVAL); | |
1a60d4c5 | 1044 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1045 | if (nfree) { |
1046 | list_del(¬ify->list); | |
f87135f5 CL |
1047 | list_for_each(p, &snd_pcm_devices) |
1048 | notify->n_unregister(list_entry(p, | |
1049 | struct snd_pcm, list)); | |
1da177e4 LT |
1050 | } else { |
1051 | list_add_tail(¬ify->list, &snd_pcm_notify_list); | |
f87135f5 CL |
1052 | list_for_each(p, &snd_pcm_devices) |
1053 | notify->n_register(list_entry(p, struct snd_pcm, list)); | |
1da177e4 | 1054 | } |
1a60d4c5 | 1055 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1056 | return 0; |
1057 | } | |
1058 | ||
e88e8ae6 TI |
1059 | EXPORT_SYMBOL(snd_pcm_notify); |
1060 | ||
e28563cc | 1061 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1062 | /* |
1063 | * Info interface | |
1064 | */ | |
1065 | ||
877211f5 TI |
1066 | static void snd_pcm_proc_read(struct snd_info_entry *entry, |
1067 | struct snd_info_buffer *buffer) | |
1da177e4 | 1068 | { |
f87135f5 | 1069 | struct list_head *p; |
877211f5 | 1070 | struct snd_pcm *pcm; |
1da177e4 | 1071 | |
1a60d4c5 | 1072 | mutex_lock(®ister_mutex); |
f87135f5 CL |
1073 | list_for_each(p, &snd_pcm_devices) { |
1074 | pcm = list_entry(p, struct snd_pcm, list); | |
1075 | snd_iprintf(buffer, "%02i-%02i: %s : %s", | |
1076 | pcm->card->number, pcm->device, pcm->id, pcm->name); | |
1da177e4 | 1077 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) |
877211f5 TI |
1078 | snd_iprintf(buffer, " : playback %i", |
1079 | pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count); | |
1da177e4 | 1080 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) |
877211f5 TI |
1081 | snd_iprintf(buffer, " : capture %i", |
1082 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); | |
1da177e4 LT |
1083 | snd_iprintf(buffer, "\n"); |
1084 | } | |
1a60d4c5 | 1085 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1086 | } |
1087 | ||
6581f4e7 | 1088 | static struct snd_info_entry *snd_pcm_proc_entry; |
1da177e4 | 1089 | |
e28563cc | 1090 | static void snd_pcm_proc_init(void) |
1da177e4 | 1091 | { |
877211f5 | 1092 | struct snd_info_entry *entry; |
1da177e4 | 1093 | |
1da177e4 | 1094 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) { |
bf850204 | 1095 | snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read); |
1da177e4 LT |
1096 | if (snd_info_register(entry) < 0) { |
1097 | snd_info_free_entry(entry); | |
1098 | entry = NULL; | |
1099 | } | |
1100 | } | |
1101 | snd_pcm_proc_entry = entry; | |
e28563cc TI |
1102 | } |
1103 | ||
1104 | static void snd_pcm_proc_done(void) | |
1105 | { | |
746d4a02 | 1106 | snd_info_free_entry(snd_pcm_proc_entry); |
e28563cc TI |
1107 | } |
1108 | ||
1109 | #else /* !CONFIG_PROC_FS */ | |
1110 | #define snd_pcm_proc_init() | |
1111 | #define snd_pcm_proc_done() | |
1112 | #endif /* CONFIG_PROC_FS */ | |
1113 | ||
1114 | ||
1115 | /* | |
1116 | * ENTRY functions | |
1117 | */ | |
1118 | ||
1119 | static int __init alsa_pcm_init(void) | |
1120 | { | |
1121 | snd_ctl_register_ioctl(snd_pcm_control_ioctl); | |
1122 | snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl); | |
1123 | snd_pcm_proc_init(); | |
1da177e4 LT |
1124 | return 0; |
1125 | } | |
1126 | ||
1127 | static void __exit alsa_pcm_exit(void) | |
1128 | { | |
1129 | snd_ctl_unregister_ioctl(snd_pcm_control_ioctl); | |
1130 | snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl); | |
e28563cc | 1131 | snd_pcm_proc_done(); |
1da177e4 LT |
1132 | } |
1133 | ||
1134 | module_init(alsa_pcm_init) | |
1135 | module_exit(alsa_pcm_exit) |