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