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