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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Digital Audio (PCM) abstract layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | */ | |
21 | ||
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 | ||
c1017a4c | 33 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>"); |
1da177e4 LT |
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 | { | |
f87135f5 CL |
48 | struct snd_pcm *pcm; |
49 | ||
9244b2c3 | 50 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
f87135f5 CL |
51 | if (pcm->card == card && pcm->device == device) |
52 | return pcm; | |
53 | } | |
54 | return NULL; | |
55 | } | |
56 | ||
877211f5 TI |
57 | static int snd_pcm_control_ioctl(struct snd_card *card, |
58 | struct snd_ctl_file *control, | |
1da177e4 LT |
59 | unsigned int cmd, unsigned long arg) |
60 | { | |
1da177e4 LT |
61 | switch (cmd) { |
62 | case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE: | |
63 | { | |
64 | int device; | |
65 | ||
66 | if (get_user(device, (int __user *)arg)) | |
67 | return -EFAULT; | |
1a60d4c5 | 68 | mutex_lock(®ister_mutex); |
1da177e4 LT |
69 | device = device < 0 ? 0 : device + 1; |
70 | while (device < SNDRV_PCM_DEVICES) { | |
f87135f5 | 71 | if (snd_pcm_search(card, device)) |
1da177e4 LT |
72 | break; |
73 | device++; | |
74 | } | |
75 | if (device == SNDRV_PCM_DEVICES) | |
76 | device = -1; | |
1a60d4c5 | 77 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
78 | if (put_user(device, (int __user *)arg)) |
79 | return -EFAULT; | |
80 | return 0; | |
81 | } | |
82 | case SNDRV_CTL_IOCTL_PCM_INFO: | |
83 | { | |
877211f5 | 84 | struct snd_pcm_info __user *info; |
1da177e4 | 85 | unsigned int device, subdevice; |
877211f5 TI |
86 | int stream; |
87 | struct snd_pcm *pcm; | |
88 | struct snd_pcm_str *pstr; | |
89 | struct snd_pcm_substream *substream; | |
f87135f5 CL |
90 | int err; |
91 | ||
877211f5 | 92 | info = (struct snd_pcm_info __user *)arg; |
1da177e4 LT |
93 | if (get_user(device, &info->device)) |
94 | return -EFAULT; | |
1da177e4 LT |
95 | if (get_user(stream, &info->stream)) |
96 | return -EFAULT; | |
97 | if (stream < 0 || stream > 1) | |
98 | return -EINVAL; | |
1da177e4 LT |
99 | if (get_user(subdevice, &info->subdevice)) |
100 | return -EFAULT; | |
1a60d4c5 | 101 | mutex_lock(®ister_mutex); |
f87135f5 CL |
102 | pcm = snd_pcm_search(card, device); |
103 | if (pcm == NULL) { | |
104 | err = -ENXIO; | |
105 | goto _error; | |
106 | } | |
107 | pstr = &pcm->streams[stream]; | |
108 | if (pstr->substream_count == 0) { | |
109 | err = -ENOENT; | |
110 | goto _error; | |
111 | } | |
112 | if (subdevice >= pstr->substream_count) { | |
113 | err = -ENXIO; | |
114 | goto _error; | |
115 | } | |
116 | for (substream = pstr->substream; substream; | |
117 | substream = substream->next) | |
1da177e4 LT |
118 | if (substream->number == (int)subdevice) |
119 | break; | |
f87135f5 CL |
120 | if (substream == NULL) { |
121 | err = -ENXIO; | |
122 | goto _error; | |
123 | } | |
124 | err = snd_pcm_info_user(substream, info); | |
125 | _error: | |
1a60d4c5 | 126 | mutex_unlock(®ister_mutex); |
f87135f5 | 127 | return err; |
1da177e4 LT |
128 | } |
129 | case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE: | |
130 | { | |
131 | int val; | |
132 | ||
133 | if (get_user(val, (int __user *)arg)) | |
134 | return -EFAULT; | |
135 | control->prefer_pcm_subdevice = val; | |
136 | return 0; | |
137 | } | |
138 | } | |
139 | return -ENOIOCTLCMD; | |
140 | } | |
21a3479a | 141 | |
b7d90a35 | 142 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
21a3479a | 143 | |
1da177e4 LT |
144 | #define STATE(v) [SNDRV_PCM_STATE_##v] = #v |
145 | #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v | |
146 | #define READY(v) [SNDRV_PCM_READY_##v] = #v | |
147 | #define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v | |
148 | #define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v | |
149 | #define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v | |
150 | #define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v | |
151 | #define START(v) [SNDRV_PCM_START_##v] = #v | |
152 | #define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v | |
153 | #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v | |
154 | ||
1da177e4 LT |
155 | static char *snd_pcm_format_names[] = { |
156 | FORMAT(S8), | |
157 | FORMAT(U8), | |
158 | FORMAT(S16_LE), | |
159 | FORMAT(S16_BE), | |
160 | FORMAT(U16_LE), | |
161 | FORMAT(U16_BE), | |
162 | FORMAT(S24_LE), | |
163 | FORMAT(S24_BE), | |
164 | FORMAT(U24_LE), | |
165 | FORMAT(U24_BE), | |
166 | FORMAT(S32_LE), | |
167 | FORMAT(S32_BE), | |
168 | FORMAT(U32_LE), | |
169 | FORMAT(U32_BE), | |
170 | FORMAT(FLOAT_LE), | |
171 | FORMAT(FLOAT_BE), | |
172 | FORMAT(FLOAT64_LE), | |
173 | FORMAT(FLOAT64_BE), | |
174 | FORMAT(IEC958_SUBFRAME_LE), | |
175 | FORMAT(IEC958_SUBFRAME_BE), | |
176 | FORMAT(MU_LAW), | |
177 | FORMAT(A_LAW), | |
178 | FORMAT(IMA_ADPCM), | |
179 | FORMAT(MPEG), | |
180 | FORMAT(GSM), | |
181 | FORMAT(SPECIAL), | |
182 | FORMAT(S24_3LE), | |
183 | FORMAT(S24_3BE), | |
184 | FORMAT(U24_3LE), | |
185 | FORMAT(U24_3BE), | |
186 | FORMAT(S20_3LE), | |
187 | FORMAT(S20_3BE), | |
188 | FORMAT(U20_3LE), | |
189 | FORMAT(U20_3BE), | |
190 | FORMAT(S18_3LE), | |
191 | FORMAT(S18_3BE), | |
192 | FORMAT(U18_3LE), | |
193 | FORMAT(U18_3BE), | |
194 | }; | |
195 | ||
12831c15 | 196 | static const char *snd_pcm_format_name(snd_pcm_format_t format) |
e28563cc TI |
197 | { |
198 | return snd_pcm_format_names[format]; | |
199 | } | |
200 | ||
e28563cc TI |
201 | static char *snd_pcm_stream_names[] = { |
202 | STREAM(PLAYBACK), | |
203 | STREAM(CAPTURE), | |
204 | }; | |
205 | ||
206 | static char *snd_pcm_state_names[] = { | |
207 | STATE(OPEN), | |
208 | STATE(SETUP), | |
209 | STATE(PREPARED), | |
210 | STATE(RUNNING), | |
211 | STATE(XRUN), | |
212 | STATE(DRAINING), | |
213 | STATE(PAUSED), | |
214 | STATE(SUSPENDED), | |
215 | }; | |
216 | ||
217 | static char *snd_pcm_access_names[] = { | |
218 | ACCESS(MMAP_INTERLEAVED), | |
219 | ACCESS(MMAP_NONINTERLEAVED), | |
220 | ACCESS(MMAP_COMPLEX), | |
221 | ACCESS(RW_INTERLEAVED), | |
222 | ACCESS(RW_NONINTERLEAVED), | |
223 | }; | |
224 | ||
1da177e4 LT |
225 | static char *snd_pcm_subformat_names[] = { |
226 | SUBFORMAT(STD), | |
227 | }; | |
228 | ||
229 | static char *snd_pcm_tstamp_mode_names[] = { | |
230 | TSTAMP(NONE), | |
231 | TSTAMP(MMAP), | |
232 | }; | |
233 | ||
877211f5 | 234 | static const char *snd_pcm_stream_name(int stream) |
1da177e4 LT |
235 | { |
236 | snd_assert(stream <= SNDRV_PCM_STREAM_LAST, return NULL); | |
237 | return snd_pcm_stream_names[stream]; | |
238 | } | |
239 | ||
240 | static const char *snd_pcm_access_name(snd_pcm_access_t access) | |
241 | { | |
1da177e4 LT |
242 | return snd_pcm_access_names[access]; |
243 | } | |
244 | ||
1da177e4 LT |
245 | static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat) |
246 | { | |
1da177e4 LT |
247 | return snd_pcm_subformat_names[subformat]; |
248 | } | |
249 | ||
877211f5 | 250 | static const char *snd_pcm_tstamp_mode_name(int mode) |
1da177e4 LT |
251 | { |
252 | snd_assert(mode <= SNDRV_PCM_TSTAMP_LAST, return NULL); | |
253 | return snd_pcm_tstamp_mode_names[mode]; | |
254 | } | |
255 | ||
256 | static const char *snd_pcm_state_name(snd_pcm_state_t state) | |
257 | { | |
1da177e4 LT |
258 | return snd_pcm_state_names[state]; |
259 | } | |
260 | ||
261 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
262 | #include <linux/soundcard.h> | |
1a60d4c5 | 263 | |
1da177e4 LT |
264 | static const char *snd_pcm_oss_format_name(int format) |
265 | { | |
266 | switch (format) { | |
267 | case AFMT_MU_LAW: | |
268 | return "MU_LAW"; | |
269 | case AFMT_A_LAW: | |
270 | return "A_LAW"; | |
271 | case AFMT_IMA_ADPCM: | |
272 | return "IMA_ADPCM"; | |
273 | case AFMT_U8: | |
274 | return "U8"; | |
275 | case AFMT_S16_LE: | |
276 | return "S16_LE"; | |
277 | case AFMT_S16_BE: | |
278 | return "S16_BE"; | |
279 | case AFMT_S8: | |
280 | return "S8"; | |
281 | case AFMT_U16_LE: | |
282 | return "U16_LE"; | |
283 | case AFMT_U16_BE: | |
284 | return "U16_BE"; | |
285 | case AFMT_MPEG: | |
286 | return "MPEG"; | |
287 | default: | |
288 | return "unknown"; | |
289 | } | |
290 | } | |
291 | #endif | |
292 | ||
877211f5 TI |
293 | static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream, |
294 | struct snd_info_buffer *buffer) | |
1da177e4 | 295 | { |
877211f5 | 296 | struct snd_pcm_info *info; |
1da177e4 LT |
297 | int err; |
298 | ||
7c22f1aa TI |
299 | if (! substream) |
300 | return; | |
1da177e4 LT |
301 | |
302 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
303 | if (! info) { | |
304 | printk(KERN_DEBUG "snd_pcm_proc_info_read: cannot malloc\n"); | |
305 | return; | |
306 | } | |
307 | ||
308 | err = snd_pcm_info(substream, info); | |
309 | if (err < 0) { | |
310 | snd_iprintf(buffer, "error %d\n", err); | |
311 | kfree(info); | |
312 | return; | |
313 | } | |
314 | snd_iprintf(buffer, "card: %d\n", info->card); | |
315 | snd_iprintf(buffer, "device: %d\n", info->device); | |
316 | snd_iprintf(buffer, "subdevice: %d\n", info->subdevice); | |
317 | snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream)); | |
318 | snd_iprintf(buffer, "id: %s\n", info->id); | |
319 | snd_iprintf(buffer, "name: %s\n", info->name); | |
320 | snd_iprintf(buffer, "subname: %s\n", info->subname); | |
321 | snd_iprintf(buffer, "class: %d\n", info->dev_class); | |
322 | snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); | |
323 | snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); | |
324 | snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); | |
325 | kfree(info); | |
326 | } | |
327 | ||
877211f5 TI |
328 | static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry, |
329 | struct snd_info_buffer *buffer) | |
1da177e4 | 330 | { |
877211f5 TI |
331 | snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream, |
332 | buffer); | |
1da177e4 LT |
333 | } |
334 | ||
877211f5 TI |
335 | static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry, |
336 | struct snd_info_buffer *buffer) | |
1da177e4 | 337 | { |
877211f5 TI |
338 | snd_pcm_proc_info_read((struct snd_pcm_substream *)entry->private_data, |
339 | buffer); | |
1da177e4 LT |
340 | } |
341 | ||
877211f5 TI |
342 | static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry, |
343 | struct snd_info_buffer *buffer) | |
1da177e4 | 344 | { |
877211f5 TI |
345 | struct snd_pcm_substream *substream = entry->private_data; |
346 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
347 | if (!runtime) { |
348 | snd_iprintf(buffer, "closed\n"); | |
349 | return; | |
350 | } | |
1da177e4 LT |
351 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
352 | snd_iprintf(buffer, "no setup\n"); | |
1da177e4 LT |
353 | return; |
354 | } | |
355 | snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); | |
356 | snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); | |
357 | snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat)); | |
358 | snd_iprintf(buffer, "channels: %u\n", runtime->channels); | |
359 | snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den); | |
360 | snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size); | |
361 | snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size); | |
362 | snd_iprintf(buffer, "tick_time: %u\n", runtime->tick_time); | |
363 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
364 | if (substream->oss.oss) { | |
365 | snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format)); | |
366 | snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels); | |
367 | snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate); | |
368 | snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes); | |
369 | snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods); | |
370 | snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); | |
371 | } | |
372 | #endif | |
1da177e4 LT |
373 | } |
374 | ||
877211f5 TI |
375 | static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry, |
376 | struct snd_info_buffer *buffer) | |
1da177e4 | 377 | { |
877211f5 TI |
378 | struct snd_pcm_substream *substream = entry->private_data; |
379 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
380 | if (!runtime) { |
381 | snd_iprintf(buffer, "closed\n"); | |
382 | return; | |
383 | } | |
1da177e4 LT |
384 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { |
385 | snd_iprintf(buffer, "no setup\n"); | |
1da177e4 LT |
386 | return; |
387 | } | |
388 | snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); | |
389 | snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); | |
390 | snd_iprintf(buffer, "sleep_min: %u\n", runtime->sleep_min); | |
391 | snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min); | |
392 | snd_iprintf(buffer, "xfer_align: %lu\n", runtime->xfer_align); | |
393 | snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold); | |
394 | snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold); | |
395 | snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); | |
396 | snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); | |
397 | snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); | |
1da177e4 LT |
398 | } |
399 | ||
877211f5 TI |
400 | static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry, |
401 | struct snd_info_buffer *buffer) | |
1da177e4 | 402 | { |
877211f5 TI |
403 | struct snd_pcm_substream *substream = entry->private_data; |
404 | struct snd_pcm_runtime *runtime = substream->runtime; | |
405 | struct snd_pcm_status status; | |
1da177e4 LT |
406 | int err; |
407 | if (!runtime) { | |
408 | snd_iprintf(buffer, "closed\n"); | |
409 | return; | |
410 | } | |
411 | memset(&status, 0, sizeof(status)); | |
412 | err = snd_pcm_status(substream, &status); | |
413 | if (err < 0) { | |
414 | snd_iprintf(buffer, "error %d\n", err); | |
415 | return; | |
416 | } | |
417 | snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); | |
418 | snd_iprintf(buffer, "trigger_time: %ld.%09ld\n", | |
419 | status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec); | |
420 | snd_iprintf(buffer, "tstamp : %ld.%09ld\n", | |
421 | status.tstamp.tv_sec, status.tstamp.tv_nsec); | |
422 | snd_iprintf(buffer, "delay : %ld\n", status.delay); | |
423 | snd_iprintf(buffer, "avail : %ld\n", status.avail); | |
424 | snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max); | |
425 | snd_iprintf(buffer, "-----\n"); | |
426 | snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); | |
427 | snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); | |
428 | } | |
1da177e4 | 429 | |
61fb63c0 | 430 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
877211f5 TI |
431 | static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry, |
432 | struct snd_info_buffer *buffer) | |
1da177e4 | 433 | { |
877211f5 | 434 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
435 | snd_iprintf(buffer, "%d\n", pstr->xrun_debug); |
436 | } | |
437 | ||
877211f5 TI |
438 | static void snd_pcm_xrun_debug_write(struct snd_info_entry *entry, |
439 | struct snd_info_buffer *buffer) | |
1da177e4 | 440 | { |
877211f5 | 441 | struct snd_pcm_str *pstr = entry->private_data; |
1da177e4 LT |
442 | char line[64]; |
443 | if (!snd_info_get_line(buffer, line, sizeof(line))) | |
444 | pstr->xrun_debug = simple_strtoul(line, NULL, 10); | |
445 | } | |
446 | #endif | |
447 | ||
877211f5 | 448 | static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) |
1da177e4 | 449 | { |
877211f5 TI |
450 | struct snd_pcm *pcm = pstr->pcm; |
451 | struct snd_info_entry *entry; | |
1da177e4 LT |
452 | char name[16]; |
453 | ||
454 | sprintf(name, "pcm%i%c", pcm->device, | |
455 | pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); | |
456 | if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL) | |
457 | return -ENOMEM; | |
458 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
459 | if (snd_info_register(entry) < 0) { | |
460 | snd_info_free_entry(entry); | |
461 | return -ENOMEM; | |
462 | } | |
463 | pstr->proc_root = entry; | |
464 | ||
465 | if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) { | |
bf850204 | 466 | snd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read); |
1da177e4 LT |
467 | if (snd_info_register(entry) < 0) { |
468 | snd_info_free_entry(entry); | |
469 | entry = NULL; | |
470 | } | |
471 | } | |
472 | pstr->proc_info_entry = entry; | |
473 | ||
61fb63c0 | 474 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
877211f5 TI |
475 | if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug", |
476 | pstr->proc_root)) != NULL) { | |
1da177e4 | 477 | entry->c.text.read = snd_pcm_xrun_debug_read; |
1da177e4 | 478 | entry->c.text.write = snd_pcm_xrun_debug_write; |
bd7bf042 | 479 | entry->mode |= S_IWUSR; |
1da177e4 LT |
480 | entry->private_data = pstr; |
481 | if (snd_info_register(entry) < 0) { | |
482 | snd_info_free_entry(entry); | |
483 | entry = NULL; | |
484 | } | |
485 | } | |
486 | pstr->proc_xrun_debug_entry = entry; | |
487 | #endif | |
488 | return 0; | |
489 | } | |
490 | ||
877211f5 | 491 | static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) |
1da177e4 | 492 | { |
61fb63c0 | 493 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
746d4a02 TI |
494 | snd_info_free_entry(pstr->proc_xrun_debug_entry); |
495 | pstr->proc_xrun_debug_entry = NULL; | |
1da177e4 | 496 | #endif |
746d4a02 TI |
497 | snd_info_free_entry(pstr->proc_info_entry); |
498 | pstr->proc_info_entry = NULL; | |
499 | snd_info_free_entry(pstr->proc_root); | |
500 | pstr->proc_root = NULL; | |
1da177e4 LT |
501 | return 0; |
502 | } | |
503 | ||
877211f5 | 504 | static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) |
1da177e4 | 505 | { |
877211f5 TI |
506 | struct snd_info_entry *entry; |
507 | struct snd_card *card; | |
1da177e4 LT |
508 | char name[16]; |
509 | ||
510 | card = substream->pcm->card; | |
511 | ||
512 | sprintf(name, "sub%i", substream->number); | |
513 | if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL) | |
514 | return -ENOMEM; | |
515 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
516 | if (snd_info_register(entry) < 0) { | |
517 | snd_info_free_entry(entry); | |
518 | return -ENOMEM; | |
519 | } | |
520 | substream->proc_root = entry; | |
521 | ||
522 | if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) { | |
bf850204 TI |
523 | snd_info_set_text_ops(entry, substream, |
524 | snd_pcm_substream_proc_info_read); | |
1da177e4 LT |
525 | if (snd_info_register(entry) < 0) { |
526 | snd_info_free_entry(entry); | |
527 | entry = NULL; | |
528 | } | |
529 | } | |
530 | substream->proc_info_entry = entry; | |
531 | ||
532 | if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
533 | snd_info_set_text_ops(entry, substream, |
534 | snd_pcm_substream_proc_hw_params_read); | |
1da177e4 LT |
535 | if (snd_info_register(entry) < 0) { |
536 | snd_info_free_entry(entry); | |
537 | entry = NULL; | |
538 | } | |
539 | } | |
540 | substream->proc_hw_params_entry = entry; | |
541 | ||
542 | if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) { | |
bf850204 TI |
543 | snd_info_set_text_ops(entry, substream, |
544 | snd_pcm_substream_proc_sw_params_read); | |
1da177e4 LT |
545 | if (snd_info_register(entry) < 0) { |
546 | snd_info_free_entry(entry); | |
547 | entry = NULL; | |
548 | } | |
549 | } | |
550 | substream->proc_sw_params_entry = entry; | |
551 | ||
552 | if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) { | |
bf850204 TI |
553 | snd_info_set_text_ops(entry, substream, |
554 | snd_pcm_substream_proc_status_read); | |
1da177e4 LT |
555 | if (snd_info_register(entry) < 0) { |
556 | snd_info_free_entry(entry); | |
557 | entry = NULL; | |
558 | } | |
559 | } | |
560 | substream->proc_status_entry = entry; | |
561 | ||
562 | return 0; | |
563 | } | |
746d4a02 | 564 | |
877211f5 | 565 | static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) |
1da177e4 | 566 | { |
746d4a02 TI |
567 | snd_info_free_entry(substream->proc_info_entry); |
568 | substream->proc_info_entry = NULL; | |
569 | snd_info_free_entry(substream->proc_hw_params_entry); | |
570 | substream->proc_hw_params_entry = NULL; | |
571 | snd_info_free_entry(substream->proc_sw_params_entry); | |
572 | substream->proc_sw_params_entry = NULL; | |
573 | snd_info_free_entry(substream->proc_status_entry); | |
574 | substream->proc_status_entry = NULL; | |
575 | snd_info_free_entry(substream->proc_root); | |
576 | substream->proc_root = NULL; | |
1da177e4 LT |
577 | return 0; |
578 | } | |
b7d90a35 | 579 | #else /* !CONFIG_SND_VERBOSE_PROCFS */ |
e28563cc TI |
580 | static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; } |
581 | static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; } | |
582 | static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; } | |
583 | static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; } | |
b7d90a35 | 584 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
1da177e4 LT |
585 | |
586 | /** | |
587 | * snd_pcm_new_stream - create a new PCM stream | |
588 | * @pcm: the pcm instance | |
589 | * @stream: the stream direction, SNDRV_PCM_STREAM_XXX | |
590 | * @substream_count: the number of substreams | |
591 | * | |
592 | * Creates a new stream for the pcm. | |
593 | * The corresponding stream on the pcm must have been empty before | |
594 | * calling this, i.e. zero must be given to the argument of | |
595 | * snd_pcm_new(). | |
596 | * | |
597 | * Returns zero if successful, or a negative error code on failure. | |
598 | */ | |
877211f5 | 599 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count) |
1da177e4 LT |
600 | { |
601 | int idx, err; | |
877211f5 TI |
602 | struct snd_pcm_str *pstr = &pcm->streams[stream]; |
603 | struct snd_pcm_substream *substream, *prev; | |
1da177e4 LT |
604 | |
605 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
1a60d4c5 | 606 | mutex_init(&pstr->oss.setup_mutex); |
1da177e4 LT |
607 | #endif |
608 | pstr->stream = stream; | |
609 | pstr->pcm = pcm; | |
610 | pstr->substream_count = substream_count; | |
1da177e4 LT |
611 | if (substream_count > 0) { |
612 | err = snd_pcm_stream_proc_init(pstr); | |
73e77ba0 TI |
613 | if (err < 0) { |
614 | snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n"); | |
1da177e4 | 615 | return err; |
73e77ba0 | 616 | } |
1da177e4 LT |
617 | } |
618 | prev = NULL; | |
619 | for (idx = 0, prev = NULL; idx < substream_count; idx++) { | |
ca2c0966 | 620 | substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
73e77ba0 TI |
621 | if (substream == NULL) { |
622 | snd_printk(KERN_ERR "Cannot allocate PCM substream\n"); | |
1da177e4 | 623 | return -ENOMEM; |
73e77ba0 | 624 | } |
1da177e4 LT |
625 | substream->pcm = pcm; |
626 | substream->pstr = pstr; | |
627 | substream->number = idx; | |
628 | substream->stream = stream; | |
629 | sprintf(substream->name, "subdevice #%i", idx); | |
9442e691 TI |
630 | snprintf(substream->latency_id, sizeof(substream->latency_id), |
631 | "ALSA-PCM%d-%d%c%d", pcm->card->number, pcm->device, | |
632 | (stream ? 'c' : 'p'), idx); | |
1da177e4 LT |
633 | substream->buffer_bytes_max = UINT_MAX; |
634 | if (prev == NULL) | |
635 | pstr->substream = substream; | |
636 | else | |
637 | prev->next = substream; | |
638 | err = snd_pcm_substream_proc_init(substream); | |
639 | if (err < 0) { | |
73e77ba0 | 640 | snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n"); |
4d361285 AM |
641 | if (prev == NULL) |
642 | pstr->substream = NULL; | |
643 | else | |
644 | prev->next = NULL; | |
1da177e4 LT |
645 | kfree(substream); |
646 | return err; | |
647 | } | |
648 | substream->group = &substream->self_group; | |
649 | spin_lock_init(&substream->self_group.lock); | |
650 | INIT_LIST_HEAD(&substream->self_group.substreams); | |
651 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
652 | spin_lock_init(&substream->timer_lock); | |
9c323fcb | 653 | atomic_set(&substream->mmap_count, 0); |
1da177e4 LT |
654 | prev = substream; |
655 | } | |
656 | return 0; | |
657 | } | |
658 | ||
e88e8ae6 TI |
659 | EXPORT_SYMBOL(snd_pcm_new_stream); |
660 | ||
1da177e4 LT |
661 | /** |
662 | * snd_pcm_new - create a new PCM instance | |
663 | * @card: the card instance | |
664 | * @id: the id string | |
665 | * @device: the device index (zero based) | |
666 | * @playback_count: the number of substreams for playback | |
667 | * @capture_count: the number of substreams for capture | |
668 | * @rpcm: the pointer to store the new pcm instance | |
669 | * | |
670 | * Creates a new PCM instance. | |
671 | * | |
672 | * The pcm operators have to be set afterwards to the new instance | |
673 | * via snd_pcm_set_ops(). | |
674 | * | |
675 | * Returns zero if successful, or a negative error code on failure. | |
676 | */ | |
877211f5 | 677 | int snd_pcm_new(struct snd_card *card, char *id, int device, |
1da177e4 | 678 | int playback_count, int capture_count, |
877211f5 | 679 | struct snd_pcm ** rpcm) |
1da177e4 | 680 | { |
877211f5 | 681 | struct snd_pcm *pcm; |
1da177e4 | 682 | int err; |
877211f5 | 683 | static struct snd_device_ops ops = { |
1da177e4 LT |
684 | .dev_free = snd_pcm_dev_free, |
685 | .dev_register = snd_pcm_dev_register, | |
686 | .dev_disconnect = snd_pcm_dev_disconnect, | |
1da177e4 LT |
687 | }; |
688 | ||
689 | snd_assert(rpcm != NULL, return -EINVAL); | |
690 | *rpcm = NULL; | |
691 | snd_assert(card != NULL, return -ENXIO); | |
ca2c0966 | 692 | pcm = kzalloc(sizeof(*pcm), GFP_KERNEL); |
73e77ba0 TI |
693 | if (pcm == NULL) { |
694 | snd_printk(KERN_ERR "Cannot allocate PCM\n"); | |
1da177e4 | 695 | return -ENOMEM; |
73e77ba0 | 696 | } |
1da177e4 LT |
697 | pcm->card = card; |
698 | pcm->device = device; | |
73e77ba0 | 699 | if (id) |
1da177e4 | 700 | strlcpy(pcm->id, id, sizeof(pcm->id)); |
1da177e4 LT |
701 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) { |
702 | snd_pcm_free(pcm); | |
703 | return err; | |
704 | } | |
705 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) { | |
706 | snd_pcm_free(pcm); | |
707 | return err; | |
708 | } | |
1a60d4c5 | 709 | mutex_init(&pcm->open_mutex); |
1da177e4 LT |
710 | init_waitqueue_head(&pcm->open_wait); |
711 | if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) { | |
712 | snd_pcm_free(pcm); | |
713 | return err; | |
714 | } | |
715 | *rpcm = pcm; | |
716 | return 0; | |
717 | } | |
718 | ||
e88e8ae6 TI |
719 | EXPORT_SYMBOL(snd_pcm_new); |
720 | ||
877211f5 | 721 | static void snd_pcm_free_stream(struct snd_pcm_str * pstr) |
1da177e4 | 722 | { |
877211f5 | 723 | struct snd_pcm_substream *substream, *substream_next; |
1da177e4 | 724 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
877211f5 | 725 | struct snd_pcm_oss_setup *setup, *setupn; |
1da177e4 LT |
726 | #endif |
727 | substream = pstr->substream; | |
728 | while (substream) { | |
729 | substream_next = substream->next; | |
c461482c | 730 | snd_pcm_timer_done(substream); |
1da177e4 LT |
731 | snd_pcm_substream_proc_done(substream); |
732 | kfree(substream); | |
733 | substream = substream_next; | |
734 | } | |
735 | snd_pcm_stream_proc_done(pstr); | |
736 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
737 | for (setup = pstr->oss.setup_list; setup; setup = setupn) { | |
738 | setupn = setup->next; | |
739 | kfree(setup->task_name); | |
740 | kfree(setup); | |
741 | } | |
742 | #endif | |
743 | } | |
744 | ||
877211f5 | 745 | static int snd_pcm_free(struct snd_pcm *pcm) |
1da177e4 | 746 | { |
c461482c TI |
747 | struct snd_pcm_notify *notify; |
748 | ||
1da177e4 | 749 | snd_assert(pcm != NULL, return -ENXIO); |
c461482c TI |
750 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
751 | notify->n_unregister(pcm); | |
752 | } | |
1da177e4 LT |
753 | if (pcm->private_free) |
754 | pcm->private_free(pcm); | |
755 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
756 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]); | |
757 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]); | |
758 | kfree(pcm); | |
759 | return 0; | |
760 | } | |
761 | ||
877211f5 | 762 | static int snd_pcm_dev_free(struct snd_device *device) |
1da177e4 | 763 | { |
877211f5 | 764 | struct snd_pcm *pcm = device->device_data; |
1da177e4 LT |
765 | return snd_pcm_free(pcm); |
766 | } | |
767 | ||
768 | static void snd_pcm_tick_timer_func(unsigned long data) | |
769 | { | |
877211f5 | 770 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *) data; |
1da177e4 LT |
771 | snd_pcm_tick_elapsed(substream); |
772 | } | |
773 | ||
3bf75f9b TI |
774 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, |
775 | struct file *file, | |
776 | struct snd_pcm_substream **rsubstream) | |
1da177e4 | 777 | { |
877211f5 TI |
778 | struct snd_pcm_str * pstr; |
779 | struct snd_pcm_substream *substream; | |
780 | struct snd_pcm_runtime *runtime; | |
781 | struct snd_ctl_file *kctl; | |
782 | struct snd_card *card; | |
1da177e4 LT |
783 | int prefer_subdevice = -1; |
784 | size_t size; | |
785 | ||
786 | snd_assert(rsubstream != NULL, return -EINVAL); | |
787 | *rsubstream = NULL; | |
788 | snd_assert(pcm != NULL, return -ENXIO); | |
789 | pstr = &pcm->streams[stream]; | |
3bf75f9b | 790 | if (pstr->substream == NULL || pstr->substream_count == 0) |
1da177e4 LT |
791 | return -ENODEV; |
792 | ||
793 | card = pcm->card; | |
794 | down_read(&card->controls_rwsem); | |
9244b2c3 | 795 | list_for_each_entry(kctl, &card->ctl_files, list) { |
1da177e4 LT |
796 | if (kctl->pid == current->pid) { |
797 | prefer_subdevice = kctl->prefer_pcm_subdevice; | |
2529bba7 TI |
798 | if (prefer_subdevice != -1) |
799 | break; | |
1da177e4 LT |
800 | } |
801 | } | |
802 | up_read(&card->controls_rwsem); | |
803 | ||
1da177e4 LT |
804 | switch (stream) { |
805 | case SNDRV_PCM_STREAM_PLAYBACK: | |
806 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
807 | for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; substream; substream = substream->next) { | |
808 | if (SUBSTREAM_BUSY(substream)) | |
809 | return -EAGAIN; | |
810 | } | |
811 | } | |
812 | break; | |
813 | case SNDRV_PCM_STREAM_CAPTURE: | |
814 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
815 | for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next) { | |
816 | if (SUBSTREAM_BUSY(substream)) | |
817 | return -EAGAIN; | |
818 | } | |
819 | } | |
820 | break; | |
821 | default: | |
822 | return -EINVAL; | |
823 | } | |
824 | ||
0df63e44 TI |
825 | if (file->f_flags & O_APPEND) { |
826 | if (prefer_subdevice < 0) { | |
827 | if (pstr->substream_count > 1) | |
828 | return -EINVAL; /* must be unique */ | |
829 | substream = pstr->substream; | |
830 | } else { | |
831 | for (substream = pstr->substream; substream; | |
832 | substream = substream->next) | |
833 | if (substream->number == prefer_subdevice) | |
834 | break; | |
835 | } | |
836 | if (! substream) | |
837 | return -ENODEV; | |
838 | if (! SUBSTREAM_BUSY(substream)) | |
839 | return -EBADFD; | |
840 | substream->ref_count++; | |
841 | *rsubstream = substream; | |
842 | return 0; | |
843 | } | |
844 | ||
1da177e4 LT |
845 | if (prefer_subdevice >= 0) { |
846 | for (substream = pstr->substream; substream; substream = substream->next) | |
847 | if (!SUBSTREAM_BUSY(substream) && substream->number == prefer_subdevice) | |
848 | goto __ok; | |
849 | } | |
850 | for (substream = pstr->substream; substream; substream = substream->next) | |
851 | if (!SUBSTREAM_BUSY(substream)) | |
852 | break; | |
853 | __ok: | |
854 | if (substream == NULL) | |
855 | return -EAGAIN; | |
856 | ||
ca2c0966 | 857 | runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); |
1da177e4 LT |
858 | if (runtime == NULL) |
859 | return -ENOMEM; | |
860 | ||
877211f5 | 861 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)); |
1da177e4 LT |
862 | runtime->status = snd_malloc_pages(size, GFP_KERNEL); |
863 | if (runtime->status == NULL) { | |
864 | kfree(runtime); | |
865 | return -ENOMEM; | |
866 | } | |
867 | memset((void*)runtime->status, 0, size); | |
868 | ||
877211f5 | 869 | size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)); |
1da177e4 LT |
870 | runtime->control = snd_malloc_pages(size, GFP_KERNEL); |
871 | if (runtime->control == NULL) { | |
877211f5 TI |
872 | snd_free_pages((void*)runtime->status, |
873 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
1da177e4 LT |
874 | kfree(runtime); |
875 | return -ENOMEM; | |
876 | } | |
877 | memset((void*)runtime->control, 0, size); | |
878 | ||
879 | init_waitqueue_head(&runtime->sleep); | |
1da177e4 LT |
880 | init_timer(&runtime->tick_timer); |
881 | runtime->tick_timer.function = snd_pcm_tick_timer_func; | |
882 | runtime->tick_timer.data = (unsigned long) substream; | |
883 | ||
884 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
885 | ||
886 | substream->runtime = runtime; | |
887 | substream->private_data = pcm->private_data; | |
0df63e44 TI |
888 | substream->ref_count = 1; |
889 | substream->f_flags = file->f_flags; | |
1da177e4 LT |
890 | pstr->substream_opened++; |
891 | *rsubstream = substream; | |
892 | return 0; | |
893 | } | |
894 | ||
3bf75f9b | 895 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream) |
1da177e4 | 896 | { |
877211f5 | 897 | struct snd_pcm_runtime *runtime; |
0df63e44 | 898 | |
1da177e4 LT |
899 | runtime = substream->runtime; |
900 | snd_assert(runtime != NULL, return); | |
901 | if (runtime->private_free != NULL) | |
902 | runtime->private_free(runtime); | |
877211f5 TI |
903 | snd_free_pages((void*)runtime->status, |
904 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status))); | |
905 | snd_free_pages((void*)runtime->control, | |
906 | PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))); | |
1da177e4 LT |
907 | kfree(runtime->hw_constraints.rules); |
908 | kfree(runtime); | |
909 | substream->runtime = NULL; | |
910 | substream->pstr->substream_opened--; | |
911 | } | |
912 | ||
d80f19fa GKH |
913 | static ssize_t show_pcm_class(struct device *dev, |
914 | struct device_attribute *attr, char *buf) | |
9d19f48c TI |
915 | { |
916 | struct snd_pcm *pcm; | |
917 | const char *str; | |
918 | static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = { | |
919 | [SNDRV_PCM_CLASS_GENERIC] = "generic", | |
920 | [SNDRV_PCM_CLASS_MULTI] = "multi", | |
921 | [SNDRV_PCM_CLASS_MODEM] = "modem", | |
922 | [SNDRV_PCM_CLASS_DIGITIZER] = "digitizer", | |
923 | }; | |
924 | ||
d80f19fa | 925 | if (! (pcm = dev_get_drvdata(dev)) || |
9d19f48c TI |
926 | pcm->dev_class > SNDRV_PCM_CLASS_LAST) |
927 | str = "none"; | |
928 | else | |
929 | str = strs[pcm->dev_class]; | |
930 | return snprintf(buf, PAGE_SIZE, "%s\n", str); | |
931 | } | |
932 | ||
d80f19fa | 933 | static struct device_attribute pcm_attrs = |
9d19f48c TI |
934 | __ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL); |
935 | ||
877211f5 | 936 | static int snd_pcm_dev_register(struct snd_device *device) |
1da177e4 | 937 | { |
f87135f5 | 938 | int cidx, err; |
877211f5 | 939 | struct snd_pcm_substream *substream; |
9244b2c3 | 940 | struct snd_pcm_notify *notify; |
1da177e4 | 941 | char str[16]; |
877211f5 | 942 | struct snd_pcm *pcm = device->device_data; |
c78085fc | 943 | struct device *dev; |
1da177e4 LT |
944 | |
945 | snd_assert(pcm != NULL && device != NULL, return -ENXIO); | |
1a60d4c5 | 946 | mutex_lock(®ister_mutex); |
f87135f5 | 947 | if (snd_pcm_search(pcm->card, pcm->device)) { |
1a60d4c5 | 948 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
949 | return -EBUSY; |
950 | } | |
f87135f5 | 951 | list_add_tail(&pcm->list, &snd_pcm_devices); |
1da177e4 LT |
952 | for (cidx = 0; cidx < 2; cidx++) { |
953 | int devtype = -1; | |
954 | if (pcm->streams[cidx].substream == NULL) | |
955 | continue; | |
956 | switch (cidx) { | |
957 | case SNDRV_PCM_STREAM_PLAYBACK: | |
958 | sprintf(str, "pcmC%iD%ip", pcm->card->number, pcm->device); | |
1da177e4 LT |
959 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; |
960 | break; | |
961 | case SNDRV_PCM_STREAM_CAPTURE: | |
962 | sprintf(str, "pcmC%iD%ic", pcm->card->number, pcm->device); | |
1da177e4 LT |
963 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; |
964 | break; | |
965 | } | |
c78085fc JB |
966 | /* device pointer to use, pcm->dev takes precedence if |
967 | * it is assigned, otherwise fall back to card's device | |
968 | * if possible */ | |
969 | dev = pcm->dev; | |
970 | if (!dev) | |
c2902c8a | 971 | dev = snd_card_get_device_link(pcm->card); |
c78085fc JB |
972 | /* register pcm */ |
973 | err = snd_register_device_for_dev(devtype, pcm->card, | |
974 | pcm->device, | |
975 | &snd_pcm_f_ops[cidx], | |
976 | pcm, str, dev); | |
977 | if (err < 0) { | |
f87135f5 | 978 | list_del(&pcm->list); |
1a60d4c5 | 979 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
980 | return err; |
981 | } | |
9d19f48c TI |
982 | snd_add_device_sysfs_file(devtype, pcm->card, pcm->device, |
983 | &pcm_attrs); | |
1da177e4 LT |
984 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) |
985 | snd_pcm_timer_init(substream); | |
986 | } | |
9244b2c3 JB |
987 | |
988 | list_for_each_entry(notify, &snd_pcm_notify_list, list) | |
1da177e4 | 989 | notify->n_register(pcm); |
9244b2c3 | 990 | |
1a60d4c5 | 991 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
992 | return 0; |
993 | } | |
994 | ||
877211f5 | 995 | static int snd_pcm_dev_disconnect(struct snd_device *device) |
1da177e4 | 996 | { |
877211f5 | 997 | struct snd_pcm *pcm = device->device_data; |
c461482c | 998 | struct snd_pcm_notify *notify; |
877211f5 | 999 | struct snd_pcm_substream *substream; |
c461482c | 1000 | int cidx, devtype; |
1da177e4 | 1001 | |
1a60d4c5 | 1002 | mutex_lock(®ister_mutex); |
c461482c TI |
1003 | if (list_empty(&pcm->list)) |
1004 | goto unlock; | |
1005 | ||
f87135f5 | 1006 | list_del_init(&pcm->list); |
1da177e4 LT |
1007 | for (cidx = 0; cidx < 2; cidx++) |
1008 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) | |
1009 | if (substream->runtime) | |
1010 | substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED; | |
c461482c | 1011 | list_for_each_entry(notify, &snd_pcm_notify_list, list) { |
1da177e4 LT |
1012 | notify->n_disconnect(pcm); |
1013 | } | |
1da177e4 LT |
1014 | for (cidx = 0; cidx < 2; cidx++) { |
1015 | devtype = -1; | |
1016 | switch (cidx) { | |
1017 | case SNDRV_PCM_STREAM_PLAYBACK: | |
1018 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; | |
1019 | break; | |
1020 | case SNDRV_PCM_STREAM_CAPTURE: | |
1021 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; | |
1022 | break; | |
1023 | } | |
1024 | snd_unregister_device(devtype, pcm->card, pcm->device); | |
1da177e4 | 1025 | } |
c461482c | 1026 | unlock: |
1a60d4c5 | 1027 | mutex_unlock(®ister_mutex); |
c461482c | 1028 | return 0; |
1da177e4 LT |
1029 | } |
1030 | ||
877211f5 | 1031 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree) |
1da177e4 | 1032 | { |
9244b2c3 | 1033 | struct snd_pcm *pcm; |
1da177e4 | 1034 | |
c461482c TI |
1035 | snd_assert(notify != NULL && |
1036 | notify->n_register != NULL && | |
1037 | notify->n_unregister != NULL && | |
1038 | notify->n_disconnect, return -EINVAL); | |
1a60d4c5 | 1039 | mutex_lock(®ister_mutex); |
1da177e4 LT |
1040 | if (nfree) { |
1041 | list_del(¬ify->list); | |
9244b2c3 JB |
1042 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1043 | notify->n_unregister(pcm); | |
1da177e4 LT |
1044 | } else { |
1045 | list_add_tail(¬ify->list, &snd_pcm_notify_list); | |
9244b2c3 JB |
1046 | list_for_each_entry(pcm, &snd_pcm_devices, list) |
1047 | notify->n_register(pcm); | |
1da177e4 | 1048 | } |
1a60d4c5 | 1049 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1050 | return 0; |
1051 | } | |
1052 | ||
e88e8ae6 TI |
1053 | EXPORT_SYMBOL(snd_pcm_notify); |
1054 | ||
e28563cc | 1055 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
1056 | /* |
1057 | * Info interface | |
1058 | */ | |
1059 | ||
877211f5 TI |
1060 | static void snd_pcm_proc_read(struct snd_info_entry *entry, |
1061 | struct snd_info_buffer *buffer) | |
1da177e4 | 1062 | { |
877211f5 | 1063 | struct snd_pcm *pcm; |
1da177e4 | 1064 | |
1a60d4c5 | 1065 | mutex_lock(®ister_mutex); |
9244b2c3 | 1066 | list_for_each_entry(pcm, &snd_pcm_devices, list) { |
f87135f5 CL |
1067 | snd_iprintf(buffer, "%02i-%02i: %s : %s", |
1068 | pcm->card->number, pcm->device, pcm->id, pcm->name); | |
1da177e4 | 1069 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) |
877211f5 TI |
1070 | snd_iprintf(buffer, " : playback %i", |
1071 | pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count); | |
1da177e4 | 1072 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) |
877211f5 TI |
1073 | snd_iprintf(buffer, " : capture %i", |
1074 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); | |
1da177e4 LT |
1075 | snd_iprintf(buffer, "\n"); |
1076 | } | |
1a60d4c5 | 1077 | mutex_unlock(®ister_mutex); |
1da177e4 LT |
1078 | } |
1079 | ||
6581f4e7 | 1080 | static struct snd_info_entry *snd_pcm_proc_entry; |
1da177e4 | 1081 | |
e28563cc | 1082 | static void snd_pcm_proc_init(void) |
1da177e4 | 1083 | { |
877211f5 | 1084 | struct snd_info_entry *entry; |
1da177e4 | 1085 | |
1da177e4 | 1086 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) { |
bf850204 | 1087 | snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read); |
1da177e4 LT |
1088 | if (snd_info_register(entry) < 0) { |
1089 | snd_info_free_entry(entry); | |
1090 | entry = NULL; | |
1091 | } | |
1092 | } | |
1093 | snd_pcm_proc_entry = entry; | |
e28563cc TI |
1094 | } |
1095 | ||
1096 | static void snd_pcm_proc_done(void) | |
1097 | { | |
746d4a02 | 1098 | snd_info_free_entry(snd_pcm_proc_entry); |
e28563cc TI |
1099 | } |
1100 | ||
1101 | #else /* !CONFIG_PROC_FS */ | |
1102 | #define snd_pcm_proc_init() | |
1103 | #define snd_pcm_proc_done() | |
1104 | #endif /* CONFIG_PROC_FS */ | |
1105 | ||
1106 | ||
1107 | /* | |
1108 | * ENTRY functions | |
1109 | */ | |
1110 | ||
1111 | static int __init alsa_pcm_init(void) | |
1112 | { | |
1113 | snd_ctl_register_ioctl(snd_pcm_control_ioctl); | |
1114 | snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl); | |
1115 | snd_pcm_proc_init(); | |
1da177e4 LT |
1116 | return 0; |
1117 | } | |
1118 | ||
1119 | static void __exit alsa_pcm_exit(void) | |
1120 | { | |
1121 | snd_ctl_unregister_ioctl(snd_pcm_control_ioctl); | |
1122 | snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl); | |
e28563cc | 1123 | snd_pcm_proc_done(); |
1da177e4 LT |
1124 | } |
1125 | ||
1126 | module_init(alsa_pcm_init) | |
1127 | module_exit(alsa_pcm_exit) |