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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 | ||
36 | snd_pcm_t *snd_pcm_devices[SNDRV_CARDS * SNDRV_PCM_DEVICES]; | |
37 | static LIST_HEAD(snd_pcm_notify_list); | |
38 | static DECLARE_MUTEX(register_mutex); | |
39 | ||
40 | static int snd_pcm_free(snd_pcm_t *pcm); | |
41 | static int snd_pcm_dev_free(snd_device_t *device); | |
42 | static int snd_pcm_dev_register(snd_device_t *device); | |
43 | static int snd_pcm_dev_disconnect(snd_device_t *device); | |
44 | static int snd_pcm_dev_unregister(snd_device_t *device); | |
45 | ||
46 | static int snd_pcm_control_ioctl(snd_card_t * card, | |
47 | snd_ctl_file_t * control, | |
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 | { | |
74 | snd_pcm_info_t __user *info; | |
75 | unsigned int device, subdevice; | |
76 | snd_pcm_stream_t stream; | |
77 | snd_pcm_t *pcm; | |
78 | snd_pcm_str_t *pstr; | |
79 | snd_pcm_substream_t *substream; | |
80 | info = (snd_pcm_info_t __user *)arg; | |
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 | ||
203 | static const char *snd_pcm_stream_name(snd_pcm_stream_t stream) | |
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 | { | |
211 | snd_assert(access <= SNDRV_PCM_ACCESS_LAST, return NULL); | |
212 | return snd_pcm_access_names[access]; | |
213 | } | |
214 | ||
215 | const char *snd_pcm_format_name(snd_pcm_format_t format) | |
216 | { | |
217 | snd_assert(format <= SNDRV_PCM_FORMAT_LAST, return NULL); | |
218 | return snd_pcm_format_names[format]; | |
219 | } | |
220 | ||
221 | static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat) | |
222 | { | |
223 | snd_assert(subformat <= SNDRV_PCM_SUBFORMAT_LAST, return NULL); | |
224 | return snd_pcm_subformat_names[subformat]; | |
225 | } | |
226 | ||
227 | static const char *snd_pcm_tstamp_mode_name(snd_pcm_tstamp_t mode) | |
228 | { | |
229 | snd_assert(mode <= SNDRV_PCM_TSTAMP_LAST, return NULL); | |
230 | return snd_pcm_tstamp_mode_names[mode]; | |
231 | } | |
232 | ||
233 | static const char *snd_pcm_state_name(snd_pcm_state_t state) | |
234 | { | |
235 | snd_assert(state <= SNDRV_PCM_STATE_LAST, return NULL); | |
236 | return snd_pcm_state_names[state]; | |
237 | } | |
238 | ||
239 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
240 | #include <linux/soundcard.h> | |
241 | static const char *snd_pcm_oss_format_name(int format) | |
242 | { | |
243 | switch (format) { | |
244 | case AFMT_MU_LAW: | |
245 | return "MU_LAW"; | |
246 | case AFMT_A_LAW: | |
247 | return "A_LAW"; | |
248 | case AFMT_IMA_ADPCM: | |
249 | return "IMA_ADPCM"; | |
250 | case AFMT_U8: | |
251 | return "U8"; | |
252 | case AFMT_S16_LE: | |
253 | return "S16_LE"; | |
254 | case AFMT_S16_BE: | |
255 | return "S16_BE"; | |
256 | case AFMT_S8: | |
257 | return "S8"; | |
258 | case AFMT_U16_LE: | |
259 | return "U16_LE"; | |
260 | case AFMT_U16_BE: | |
261 | return "U16_BE"; | |
262 | case AFMT_MPEG: | |
263 | return "MPEG"; | |
264 | default: | |
265 | return "unknown"; | |
266 | } | |
267 | } | |
268 | #endif | |
269 | ||
270 | #ifdef CONFIG_PROC_FS | |
271 | static void snd_pcm_proc_info_read(snd_pcm_substream_t *substream, snd_info_buffer_t *buffer) | |
272 | { | |
273 | snd_pcm_info_t *info; | |
274 | int err; | |
275 | ||
276 | snd_runtime_check(substream, return); | |
277 | ||
278 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
279 | if (! info) { | |
280 | printk(KERN_DEBUG "snd_pcm_proc_info_read: cannot malloc\n"); | |
281 | return; | |
282 | } | |
283 | ||
284 | err = snd_pcm_info(substream, info); | |
285 | if (err < 0) { | |
286 | snd_iprintf(buffer, "error %d\n", err); | |
287 | kfree(info); | |
288 | return; | |
289 | } | |
290 | snd_iprintf(buffer, "card: %d\n", info->card); | |
291 | snd_iprintf(buffer, "device: %d\n", info->device); | |
292 | snd_iprintf(buffer, "subdevice: %d\n", info->subdevice); | |
293 | snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream)); | |
294 | snd_iprintf(buffer, "id: %s\n", info->id); | |
295 | snd_iprintf(buffer, "name: %s\n", info->name); | |
296 | snd_iprintf(buffer, "subname: %s\n", info->subname); | |
297 | snd_iprintf(buffer, "class: %d\n", info->dev_class); | |
298 | snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass); | |
299 | snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count); | |
300 | snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail); | |
301 | kfree(info); | |
302 | } | |
303 | ||
304 | static void snd_pcm_stream_proc_info_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer) | |
305 | { | |
306 | snd_pcm_proc_info_read(((snd_pcm_str_t *)entry->private_data)->substream, buffer); | |
307 | } | |
308 | ||
309 | static void snd_pcm_substream_proc_info_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer) | |
310 | { | |
311 | snd_pcm_proc_info_read((snd_pcm_substream_t *)entry->private_data, buffer); | |
312 | } | |
313 | ||
314 | static void snd_pcm_substream_proc_hw_params_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer) | |
315 | { | |
316 | snd_pcm_substream_t *substream = (snd_pcm_substream_t *)entry->private_data; | |
317 | snd_pcm_runtime_t *runtime = substream->runtime; | |
318 | if (!runtime) { | |
319 | snd_iprintf(buffer, "closed\n"); | |
320 | return; | |
321 | } | |
322 | snd_pcm_stream_lock_irq(substream); | |
323 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
324 | snd_iprintf(buffer, "no setup\n"); | |
325 | snd_pcm_stream_unlock_irq(substream); | |
326 | return; | |
327 | } | |
328 | snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access)); | |
329 | snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format)); | |
330 | snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat)); | |
331 | snd_iprintf(buffer, "channels: %u\n", runtime->channels); | |
332 | snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den); | |
333 | snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size); | |
334 | snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size); | |
335 | snd_iprintf(buffer, "tick_time: %u\n", runtime->tick_time); | |
336 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
337 | if (substream->oss.oss) { | |
338 | snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format)); | |
339 | snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels); | |
340 | snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate); | |
341 | snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes); | |
342 | snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods); | |
343 | snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames); | |
344 | } | |
345 | #endif | |
346 | snd_pcm_stream_unlock_irq(substream); | |
347 | } | |
348 | ||
349 | static void snd_pcm_substream_proc_sw_params_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer) | |
350 | { | |
351 | snd_pcm_substream_t *substream = (snd_pcm_substream_t *)entry->private_data; | |
352 | snd_pcm_runtime_t *runtime = substream->runtime; | |
353 | if (!runtime) { | |
354 | snd_iprintf(buffer, "closed\n"); | |
355 | return; | |
356 | } | |
357 | snd_pcm_stream_lock_irq(substream); | |
358 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) { | |
359 | snd_iprintf(buffer, "no setup\n"); | |
360 | snd_pcm_stream_unlock_irq(substream); | |
361 | return; | |
362 | } | |
363 | snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode)); | |
364 | snd_iprintf(buffer, "period_step: %u\n", runtime->period_step); | |
365 | snd_iprintf(buffer, "sleep_min: %u\n", runtime->sleep_min); | |
366 | snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min); | |
367 | snd_iprintf(buffer, "xfer_align: %lu\n", runtime->xfer_align); | |
368 | snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold); | |
369 | snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold); | |
370 | snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold); | |
371 | snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size); | |
372 | snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary); | |
373 | snd_pcm_stream_unlock_irq(substream); | |
374 | } | |
375 | ||
376 | static void snd_pcm_substream_proc_status_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer) | |
377 | { | |
378 | snd_pcm_substream_t *substream = (snd_pcm_substream_t *)entry->private_data; | |
379 | snd_pcm_runtime_t *runtime = substream->runtime; | |
380 | snd_pcm_status_t status; | |
381 | int err; | |
382 | if (!runtime) { | |
383 | snd_iprintf(buffer, "closed\n"); | |
384 | return; | |
385 | } | |
386 | memset(&status, 0, sizeof(status)); | |
387 | err = snd_pcm_status(substream, &status); | |
388 | if (err < 0) { | |
389 | snd_iprintf(buffer, "error %d\n", err); | |
390 | return; | |
391 | } | |
392 | snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state)); | |
393 | snd_iprintf(buffer, "trigger_time: %ld.%09ld\n", | |
394 | status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec); | |
395 | snd_iprintf(buffer, "tstamp : %ld.%09ld\n", | |
396 | status.tstamp.tv_sec, status.tstamp.tv_nsec); | |
397 | snd_iprintf(buffer, "delay : %ld\n", status.delay); | |
398 | snd_iprintf(buffer, "avail : %ld\n", status.avail); | |
399 | snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max); | |
400 | snd_iprintf(buffer, "-----\n"); | |
401 | snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr); | |
402 | snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr); | |
403 | } | |
404 | #endif | |
405 | ||
406 | #ifdef CONFIG_SND_DEBUG | |
407 | static void snd_pcm_xrun_debug_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer) | |
408 | { | |
409 | snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data; | |
410 | snd_iprintf(buffer, "%d\n", pstr->xrun_debug); | |
411 | } | |
412 | ||
413 | static void snd_pcm_xrun_debug_write(snd_info_entry_t *entry, snd_info_buffer_t *buffer) | |
414 | { | |
415 | snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data; | |
416 | char line[64]; | |
417 | if (!snd_info_get_line(buffer, line, sizeof(line))) | |
418 | pstr->xrun_debug = simple_strtoul(line, NULL, 10); | |
419 | } | |
420 | #endif | |
421 | ||
422 | static int snd_pcm_stream_proc_init(snd_pcm_str_t *pstr) | |
423 | { | |
424 | snd_pcm_t *pcm = pstr->pcm; | |
425 | snd_info_entry_t *entry; | |
426 | char name[16]; | |
427 | ||
428 | sprintf(name, "pcm%i%c", pcm->device, | |
429 | pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c'); | |
430 | if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL) | |
431 | return -ENOMEM; | |
432 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
433 | if (snd_info_register(entry) < 0) { | |
434 | snd_info_free_entry(entry); | |
435 | return -ENOMEM; | |
436 | } | |
437 | pstr->proc_root = entry; | |
438 | ||
439 | if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) { | |
440 | snd_info_set_text_ops(entry, pstr, 256, snd_pcm_stream_proc_info_read); | |
441 | if (snd_info_register(entry) < 0) { | |
442 | snd_info_free_entry(entry); | |
443 | entry = NULL; | |
444 | } | |
445 | } | |
446 | pstr->proc_info_entry = entry; | |
447 | ||
448 | #ifdef CONFIG_SND_DEBUG | |
449 | if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug", pstr->proc_root)) != NULL) { | |
450 | entry->c.text.read_size = 64; | |
451 | entry->c.text.read = snd_pcm_xrun_debug_read; | |
452 | entry->c.text.write_size = 64; | |
453 | entry->c.text.write = snd_pcm_xrun_debug_write; | |
454 | entry->private_data = pstr; | |
455 | if (snd_info_register(entry) < 0) { | |
456 | snd_info_free_entry(entry); | |
457 | entry = NULL; | |
458 | } | |
459 | } | |
460 | pstr->proc_xrun_debug_entry = entry; | |
461 | #endif | |
462 | return 0; | |
463 | } | |
464 | ||
465 | static int snd_pcm_stream_proc_done(snd_pcm_str_t *pstr) | |
466 | { | |
467 | #ifdef CONFIG_SND_DEBUG | |
468 | if (pstr->proc_xrun_debug_entry) { | |
469 | snd_info_unregister(pstr->proc_xrun_debug_entry); | |
470 | pstr->proc_xrun_debug_entry = NULL; | |
471 | } | |
472 | #endif | |
473 | if (pstr->proc_info_entry) { | |
474 | snd_info_unregister(pstr->proc_info_entry); | |
475 | pstr->proc_info_entry = NULL; | |
476 | } | |
477 | if (pstr->proc_root) { | |
478 | snd_info_unregister(pstr->proc_root); | |
479 | pstr->proc_root = NULL; | |
480 | } | |
481 | return 0; | |
482 | } | |
483 | ||
484 | static int snd_pcm_substream_proc_init(snd_pcm_substream_t *substream) | |
485 | { | |
486 | snd_info_entry_t *entry; | |
487 | snd_card_t *card; | |
488 | char name[16]; | |
489 | ||
490 | card = substream->pcm->card; | |
491 | ||
492 | sprintf(name, "sub%i", substream->number); | |
493 | if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL) | |
494 | return -ENOMEM; | |
495 | entry->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
496 | if (snd_info_register(entry) < 0) { | |
497 | snd_info_free_entry(entry); | |
498 | return -ENOMEM; | |
499 | } | |
500 | substream->proc_root = entry; | |
501 | ||
502 | if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) { | |
503 | snd_info_set_text_ops(entry, substream, 256, snd_pcm_substream_proc_info_read); | |
504 | if (snd_info_register(entry) < 0) { | |
505 | snd_info_free_entry(entry); | |
506 | entry = NULL; | |
507 | } | |
508 | } | |
509 | substream->proc_info_entry = entry; | |
510 | ||
511 | if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) { | |
512 | snd_info_set_text_ops(entry, substream, 256, snd_pcm_substream_proc_hw_params_read); | |
513 | if (snd_info_register(entry) < 0) { | |
514 | snd_info_free_entry(entry); | |
515 | entry = NULL; | |
516 | } | |
517 | } | |
518 | substream->proc_hw_params_entry = entry; | |
519 | ||
520 | if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) { | |
521 | snd_info_set_text_ops(entry, substream, 256, snd_pcm_substream_proc_sw_params_read); | |
522 | if (snd_info_register(entry) < 0) { | |
523 | snd_info_free_entry(entry); | |
524 | entry = NULL; | |
525 | } | |
526 | } | |
527 | substream->proc_sw_params_entry = entry; | |
528 | ||
529 | if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) { | |
530 | snd_info_set_text_ops(entry, substream, 256, snd_pcm_substream_proc_status_read); | |
531 | if (snd_info_register(entry) < 0) { | |
532 | snd_info_free_entry(entry); | |
533 | entry = NULL; | |
534 | } | |
535 | } | |
536 | substream->proc_status_entry = entry; | |
537 | ||
538 | return 0; | |
539 | } | |
540 | ||
541 | static int snd_pcm_substream_proc_done(snd_pcm_substream_t *substream) | |
542 | { | |
543 | if (substream->proc_info_entry) { | |
544 | snd_info_unregister(substream->proc_info_entry); | |
545 | substream->proc_info_entry = NULL; | |
546 | } | |
547 | if (substream->proc_hw_params_entry) { | |
548 | snd_info_unregister(substream->proc_hw_params_entry); | |
549 | substream->proc_hw_params_entry = NULL; | |
550 | } | |
551 | if (substream->proc_sw_params_entry) { | |
552 | snd_info_unregister(substream->proc_sw_params_entry); | |
553 | substream->proc_sw_params_entry = NULL; | |
554 | } | |
555 | if (substream->proc_status_entry) { | |
556 | snd_info_unregister(substream->proc_status_entry); | |
557 | substream->proc_status_entry = NULL; | |
558 | } | |
559 | if (substream->proc_root) { | |
560 | snd_info_unregister(substream->proc_root); | |
561 | substream->proc_root = NULL; | |
562 | } | |
563 | return 0; | |
564 | } | |
565 | ||
566 | /** | |
567 | * snd_pcm_new_stream - create a new PCM stream | |
568 | * @pcm: the pcm instance | |
569 | * @stream: the stream direction, SNDRV_PCM_STREAM_XXX | |
570 | * @substream_count: the number of substreams | |
571 | * | |
572 | * Creates a new stream for the pcm. | |
573 | * The corresponding stream on the pcm must have been empty before | |
574 | * calling this, i.e. zero must be given to the argument of | |
575 | * snd_pcm_new(). | |
576 | * | |
577 | * Returns zero if successful, or a negative error code on failure. | |
578 | */ | |
579 | int snd_pcm_new_stream(snd_pcm_t *pcm, int stream, int substream_count) | |
580 | { | |
581 | int idx, err; | |
582 | snd_pcm_str_t *pstr = &pcm->streams[stream]; | |
583 | snd_pcm_substream_t *substream, *prev; | |
584 | ||
585 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
586 | init_MUTEX(&pstr->oss.setup_mutex); | |
587 | #endif | |
588 | pstr->stream = stream; | |
589 | pstr->pcm = pcm; | |
590 | pstr->substream_count = substream_count; | |
591 | pstr->reg = &snd_pcm_reg[stream]; | |
592 | if (substream_count > 0) { | |
593 | err = snd_pcm_stream_proc_init(pstr); | |
594 | if (err < 0) | |
595 | return err; | |
596 | } | |
597 | prev = NULL; | |
598 | for (idx = 0, prev = NULL; idx < substream_count; idx++) { | |
599 | substream = kcalloc(1, sizeof(*substream), GFP_KERNEL); | |
600 | if (substream == NULL) | |
601 | return -ENOMEM; | |
602 | substream->pcm = pcm; | |
603 | substream->pstr = pstr; | |
604 | substream->number = idx; | |
605 | substream->stream = stream; | |
606 | sprintf(substream->name, "subdevice #%i", idx); | |
607 | substream->buffer_bytes_max = UINT_MAX; | |
608 | if (prev == NULL) | |
609 | pstr->substream = substream; | |
610 | else | |
611 | prev->next = substream; | |
612 | err = snd_pcm_substream_proc_init(substream); | |
613 | if (err < 0) { | |
614 | kfree(substream); | |
615 | return err; | |
616 | } | |
617 | substream->group = &substream->self_group; | |
618 | spin_lock_init(&substream->self_group.lock); | |
619 | INIT_LIST_HEAD(&substream->self_group.substreams); | |
620 | list_add_tail(&substream->link_list, &substream->self_group.substreams); | |
621 | spin_lock_init(&substream->timer_lock); | |
622 | prev = substream; | |
623 | } | |
624 | return 0; | |
625 | } | |
626 | ||
627 | /** | |
628 | * snd_pcm_new - create a new PCM instance | |
629 | * @card: the card instance | |
630 | * @id: the id string | |
631 | * @device: the device index (zero based) | |
632 | * @playback_count: the number of substreams for playback | |
633 | * @capture_count: the number of substreams for capture | |
634 | * @rpcm: the pointer to store the new pcm instance | |
635 | * | |
636 | * Creates a new PCM instance. | |
637 | * | |
638 | * The pcm operators have to be set afterwards to the new instance | |
639 | * via snd_pcm_set_ops(). | |
640 | * | |
641 | * Returns zero if successful, or a negative error code on failure. | |
642 | */ | |
643 | int snd_pcm_new(snd_card_t * card, char *id, int device, | |
644 | int playback_count, int capture_count, | |
645 | snd_pcm_t ** rpcm) | |
646 | { | |
647 | snd_pcm_t *pcm; | |
648 | int err; | |
649 | static snd_device_ops_t ops = { | |
650 | .dev_free = snd_pcm_dev_free, | |
651 | .dev_register = snd_pcm_dev_register, | |
652 | .dev_disconnect = snd_pcm_dev_disconnect, | |
653 | .dev_unregister = snd_pcm_dev_unregister | |
654 | }; | |
655 | ||
656 | snd_assert(rpcm != NULL, return -EINVAL); | |
657 | *rpcm = NULL; | |
658 | snd_assert(card != NULL, return -ENXIO); | |
659 | pcm = kcalloc(1, sizeof(*pcm), GFP_KERNEL); | |
660 | if (pcm == NULL) | |
661 | return -ENOMEM; | |
662 | pcm->card = card; | |
663 | pcm->device = device; | |
664 | if (id) { | |
665 | strlcpy(pcm->id, id, sizeof(pcm->id)); | |
666 | } | |
667 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) { | |
668 | snd_pcm_free(pcm); | |
669 | return err; | |
670 | } | |
671 | if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) { | |
672 | snd_pcm_free(pcm); | |
673 | return err; | |
674 | } | |
675 | init_MUTEX(&pcm->open_mutex); | |
676 | init_waitqueue_head(&pcm->open_wait); | |
677 | if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) { | |
678 | snd_pcm_free(pcm); | |
679 | return err; | |
680 | } | |
681 | *rpcm = pcm; | |
682 | return 0; | |
683 | } | |
684 | ||
685 | static void snd_pcm_free_stream(snd_pcm_str_t * pstr) | |
686 | { | |
687 | snd_pcm_substream_t *substream, *substream_next; | |
688 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
689 | snd_pcm_oss_setup_t *setup, *setupn; | |
690 | #endif | |
691 | substream = pstr->substream; | |
692 | while (substream) { | |
693 | substream_next = substream->next; | |
694 | snd_pcm_substream_proc_done(substream); | |
695 | kfree(substream); | |
696 | substream = substream_next; | |
697 | } | |
698 | snd_pcm_stream_proc_done(pstr); | |
699 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) | |
700 | for (setup = pstr->oss.setup_list; setup; setup = setupn) { | |
701 | setupn = setup->next; | |
702 | kfree(setup->task_name); | |
703 | kfree(setup); | |
704 | } | |
705 | #endif | |
706 | } | |
707 | ||
708 | static int snd_pcm_free(snd_pcm_t *pcm) | |
709 | { | |
710 | snd_assert(pcm != NULL, return -ENXIO); | |
711 | if (pcm->private_free) | |
712 | pcm->private_free(pcm); | |
713 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
714 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]); | |
715 | snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]); | |
716 | kfree(pcm); | |
717 | return 0; | |
718 | } | |
719 | ||
720 | static int snd_pcm_dev_free(snd_device_t *device) | |
721 | { | |
722 | snd_pcm_t *pcm = device->device_data; | |
723 | return snd_pcm_free(pcm); | |
724 | } | |
725 | ||
726 | static void snd_pcm_tick_timer_func(unsigned long data) | |
727 | { | |
728 | snd_pcm_substream_t *substream = (snd_pcm_substream_t*) data; | |
729 | snd_pcm_tick_elapsed(substream); | |
730 | } | |
731 | ||
732 | int snd_pcm_open_substream(snd_pcm_t *pcm, int stream, | |
733 | snd_pcm_substream_t **rsubstream) | |
734 | { | |
735 | snd_pcm_str_t * pstr; | |
736 | snd_pcm_substream_t * substream; | |
737 | snd_pcm_runtime_t * runtime; | |
738 | snd_ctl_file_t *kctl; | |
739 | snd_card_t *card; | |
740 | struct list_head *list; | |
741 | int prefer_subdevice = -1; | |
742 | size_t size; | |
743 | ||
744 | snd_assert(rsubstream != NULL, return -EINVAL); | |
745 | *rsubstream = NULL; | |
746 | snd_assert(pcm != NULL, return -ENXIO); | |
747 | pstr = &pcm->streams[stream]; | |
748 | if (pstr->substream == NULL) | |
749 | return -ENODEV; | |
750 | ||
751 | card = pcm->card; | |
752 | down_read(&card->controls_rwsem); | |
753 | list_for_each(list, &card->ctl_files) { | |
754 | kctl = snd_ctl_file(list); | |
755 | if (kctl->pid == current->pid) { | |
756 | prefer_subdevice = kctl->prefer_pcm_subdevice; | |
757 | break; | |
758 | } | |
759 | } | |
760 | up_read(&card->controls_rwsem); | |
761 | ||
762 | if (pstr->substream_count == 0) | |
763 | return -ENODEV; | |
764 | switch (stream) { | |
765 | case SNDRV_PCM_STREAM_PLAYBACK: | |
766 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
767 | for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; substream; substream = substream->next) { | |
768 | if (SUBSTREAM_BUSY(substream)) | |
769 | return -EAGAIN; | |
770 | } | |
771 | } | |
772 | break; | |
773 | case SNDRV_PCM_STREAM_CAPTURE: | |
774 | if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) { | |
775 | for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next) { | |
776 | if (SUBSTREAM_BUSY(substream)) | |
777 | return -EAGAIN; | |
778 | } | |
779 | } | |
780 | break; | |
781 | default: | |
782 | return -EINVAL; | |
783 | } | |
784 | ||
785 | if (prefer_subdevice >= 0) { | |
786 | for (substream = pstr->substream; substream; substream = substream->next) | |
787 | if (!SUBSTREAM_BUSY(substream) && substream->number == prefer_subdevice) | |
788 | goto __ok; | |
789 | } | |
790 | for (substream = pstr->substream; substream; substream = substream->next) | |
791 | if (!SUBSTREAM_BUSY(substream)) | |
792 | break; | |
793 | __ok: | |
794 | if (substream == NULL) | |
795 | return -EAGAIN; | |
796 | ||
797 | runtime = kcalloc(1, sizeof(*runtime), GFP_KERNEL); | |
798 | if (runtime == NULL) | |
799 | return -ENOMEM; | |
800 | ||
801 | size = PAGE_ALIGN(sizeof(snd_pcm_mmap_status_t)); | |
802 | runtime->status = snd_malloc_pages(size, GFP_KERNEL); | |
803 | if (runtime->status == NULL) { | |
804 | kfree(runtime); | |
805 | return -ENOMEM; | |
806 | } | |
807 | memset((void*)runtime->status, 0, size); | |
808 | ||
809 | size = PAGE_ALIGN(sizeof(snd_pcm_mmap_control_t)); | |
810 | runtime->control = snd_malloc_pages(size, GFP_KERNEL); | |
811 | if (runtime->control == NULL) { | |
812 | snd_free_pages((void*)runtime->status, PAGE_ALIGN(sizeof(snd_pcm_mmap_status_t))); | |
813 | kfree(runtime); | |
814 | return -ENOMEM; | |
815 | } | |
816 | memset((void*)runtime->control, 0, size); | |
817 | ||
818 | init_waitqueue_head(&runtime->sleep); | |
819 | atomic_set(&runtime->mmap_count, 0); | |
820 | init_timer(&runtime->tick_timer); | |
821 | runtime->tick_timer.function = snd_pcm_tick_timer_func; | |
822 | runtime->tick_timer.data = (unsigned long) substream; | |
823 | ||
824 | runtime->status->state = SNDRV_PCM_STATE_OPEN; | |
825 | ||
826 | substream->runtime = runtime; | |
827 | substream->private_data = pcm->private_data; | |
828 | pstr->substream_opened++; | |
829 | *rsubstream = substream; | |
830 | return 0; | |
831 | } | |
832 | ||
833 | void snd_pcm_release_substream(snd_pcm_substream_t *substream) | |
834 | { | |
835 | snd_pcm_runtime_t * runtime; | |
836 | substream->file = NULL; | |
837 | runtime = substream->runtime; | |
838 | snd_assert(runtime != NULL, return); | |
839 | if (runtime->private_free != NULL) | |
840 | runtime->private_free(runtime); | |
841 | snd_free_pages((void*)runtime->status, PAGE_ALIGN(sizeof(snd_pcm_mmap_status_t))); | |
842 | snd_free_pages((void*)runtime->control, PAGE_ALIGN(sizeof(snd_pcm_mmap_control_t))); | |
843 | kfree(runtime->hw_constraints.rules); | |
844 | kfree(runtime); | |
845 | substream->runtime = NULL; | |
846 | substream->pstr->substream_opened--; | |
847 | } | |
848 | ||
849 | static int snd_pcm_dev_register(snd_device_t *device) | |
850 | { | |
851 | int idx, cidx, err; | |
852 | unsigned short minor; | |
853 | snd_pcm_substream_t *substream; | |
854 | struct list_head *list; | |
855 | char str[16]; | |
856 | snd_pcm_t *pcm = device->device_data; | |
857 | ||
858 | snd_assert(pcm != NULL && device != NULL, return -ENXIO); | |
859 | down(®ister_mutex); | |
860 | idx = (pcm->card->number * SNDRV_PCM_DEVICES) + pcm->device; | |
861 | if (snd_pcm_devices[idx]) { | |
862 | up(®ister_mutex); | |
863 | return -EBUSY; | |
864 | } | |
865 | snd_pcm_devices[idx] = pcm; | |
866 | for (cidx = 0; cidx < 2; cidx++) { | |
867 | int devtype = -1; | |
868 | if (pcm->streams[cidx].substream == NULL) | |
869 | continue; | |
870 | switch (cidx) { | |
871 | case SNDRV_PCM_STREAM_PLAYBACK: | |
872 | sprintf(str, "pcmC%iD%ip", pcm->card->number, pcm->device); | |
873 | minor = SNDRV_MINOR_PCM_PLAYBACK + idx; | |
874 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; | |
875 | break; | |
876 | case SNDRV_PCM_STREAM_CAPTURE: | |
877 | sprintf(str, "pcmC%iD%ic", pcm->card->number, pcm->device); | |
878 | minor = SNDRV_MINOR_PCM_CAPTURE + idx; | |
879 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; | |
880 | break; | |
881 | } | |
882 | if ((err = snd_register_device(devtype, pcm->card, pcm->device, pcm->streams[cidx].reg, str)) < 0) { | |
883 | snd_pcm_devices[idx] = NULL; | |
884 | up(®ister_mutex); | |
885 | return err; | |
886 | } | |
887 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) | |
888 | snd_pcm_timer_init(substream); | |
889 | } | |
890 | list_for_each(list, &snd_pcm_notify_list) { | |
891 | snd_pcm_notify_t *notify; | |
892 | notify = list_entry(list, snd_pcm_notify_t, list); | |
893 | notify->n_register(pcm); | |
894 | } | |
895 | up(®ister_mutex); | |
896 | return 0; | |
897 | } | |
898 | ||
899 | static int snd_pcm_dev_disconnect(snd_device_t *device) | |
900 | { | |
901 | snd_pcm_t *pcm = device->device_data; | |
902 | struct list_head *list; | |
903 | snd_pcm_substream_t *substream; | |
904 | int idx, cidx; | |
905 | ||
906 | down(®ister_mutex); | |
907 | idx = (pcm->card->number * SNDRV_PCM_DEVICES) + pcm->device; | |
908 | snd_pcm_devices[idx] = NULL; | |
909 | for (cidx = 0; cidx < 2; cidx++) | |
910 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) | |
911 | if (substream->runtime) | |
912 | substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED; | |
913 | list_for_each(list, &snd_pcm_notify_list) { | |
914 | snd_pcm_notify_t *notify; | |
915 | notify = list_entry(list, snd_pcm_notify_t, list); | |
916 | notify->n_disconnect(pcm); | |
917 | } | |
918 | up(®ister_mutex); | |
919 | return 0; | |
920 | } | |
921 | ||
922 | static int snd_pcm_dev_unregister(snd_device_t *device) | |
923 | { | |
924 | int idx, cidx, devtype; | |
925 | snd_pcm_substream_t *substream; | |
926 | struct list_head *list; | |
927 | snd_pcm_t *pcm = device->device_data; | |
928 | ||
929 | snd_assert(pcm != NULL, return -ENXIO); | |
930 | down(®ister_mutex); | |
931 | idx = (pcm->card->number * SNDRV_PCM_DEVICES) + pcm->device; | |
932 | snd_pcm_devices[idx] = NULL; | |
933 | for (cidx = 0; cidx < 2; cidx++) { | |
934 | devtype = -1; | |
935 | switch (cidx) { | |
936 | case SNDRV_PCM_STREAM_PLAYBACK: | |
937 | devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK; | |
938 | break; | |
939 | case SNDRV_PCM_STREAM_CAPTURE: | |
940 | devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE; | |
941 | break; | |
942 | } | |
943 | snd_unregister_device(devtype, pcm->card, pcm->device); | |
944 | for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) | |
945 | snd_pcm_timer_done(substream); | |
946 | } | |
947 | list_for_each(list, &snd_pcm_notify_list) { | |
948 | snd_pcm_notify_t *notify; | |
949 | notify = list_entry(list, snd_pcm_notify_t, list); | |
950 | notify->n_unregister(pcm); | |
951 | } | |
952 | up(®ister_mutex); | |
953 | return snd_pcm_free(pcm); | |
954 | } | |
955 | ||
956 | int snd_pcm_notify(snd_pcm_notify_t *notify, int nfree) | |
957 | { | |
958 | int idx; | |
959 | ||
960 | snd_assert(notify != NULL && notify->n_register != NULL && notify->n_unregister != NULL, return -EINVAL); | |
961 | down(®ister_mutex); | |
962 | if (nfree) { | |
963 | list_del(¬ify->list); | |
964 | for (idx = 0; idx < SNDRV_CARDS * SNDRV_PCM_DEVICES; idx++) { | |
965 | if (snd_pcm_devices[idx] == NULL) | |
966 | continue; | |
967 | notify->n_unregister(snd_pcm_devices[idx]); | |
968 | } | |
969 | } else { | |
970 | list_add_tail(¬ify->list, &snd_pcm_notify_list); | |
971 | for (idx = 0; idx < SNDRV_CARDS * SNDRV_PCM_DEVICES; idx++) { | |
972 | if (snd_pcm_devices[idx] == NULL) | |
973 | continue; | |
974 | notify->n_register(snd_pcm_devices[idx]); | |
975 | } | |
976 | } | |
977 | up(®ister_mutex); | |
978 | return 0; | |
979 | } | |
980 | ||
981 | /* | |
982 | * Info interface | |
983 | */ | |
984 | ||
985 | static void snd_pcm_proc_read(snd_info_entry_t *entry, snd_info_buffer_t * buffer) | |
986 | { | |
987 | int idx; | |
988 | snd_pcm_t *pcm; | |
989 | ||
990 | down(®ister_mutex); | |
991 | for (idx = 0; idx < SNDRV_CARDS * SNDRV_PCM_DEVICES; idx++) { | |
992 | pcm = snd_pcm_devices[idx]; | |
993 | if (pcm == NULL) | |
994 | continue; | |
995 | snd_iprintf(buffer, "%02i-%02i: %s : %s", idx / SNDRV_PCM_DEVICES, | |
996 | idx % SNDRV_PCM_DEVICES, pcm->id, pcm->name); | |
997 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) | |
998 | snd_iprintf(buffer, " : playback %i", pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count); | |
999 | if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) | |
1000 | snd_iprintf(buffer, " : capture %i", pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count); | |
1001 | snd_iprintf(buffer, "\n"); | |
1002 | } | |
1003 | up(®ister_mutex); | |
1004 | } | |
1005 | ||
1006 | /* | |
1007 | * ENTRY functions | |
1008 | */ | |
1009 | ||
1010 | static snd_info_entry_t *snd_pcm_proc_entry = NULL; | |
1011 | ||
1012 | static int __init alsa_pcm_init(void) | |
1013 | { | |
1014 | snd_info_entry_t *entry; | |
1015 | ||
1016 | snd_ctl_register_ioctl(snd_pcm_control_ioctl); | |
1017 | snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl); | |
1018 | if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) { | |
1019 | snd_info_set_text_ops(entry, NULL, SNDRV_CARDS * SNDRV_PCM_DEVICES * 128, snd_pcm_proc_read); | |
1020 | if (snd_info_register(entry) < 0) { | |
1021 | snd_info_free_entry(entry); | |
1022 | entry = NULL; | |
1023 | } | |
1024 | } | |
1025 | snd_pcm_proc_entry = entry; | |
1026 | return 0; | |
1027 | } | |
1028 | ||
1029 | static void __exit alsa_pcm_exit(void) | |
1030 | { | |
1031 | snd_ctl_unregister_ioctl(snd_pcm_control_ioctl); | |
1032 | snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl); | |
1033 | if (snd_pcm_proc_entry) { | |
1034 | snd_info_unregister(snd_pcm_proc_entry); | |
1035 | snd_pcm_proc_entry = NULL; | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | module_init(alsa_pcm_init) | |
1040 | module_exit(alsa_pcm_exit) | |
1041 | ||
1042 | EXPORT_SYMBOL(snd_pcm_devices); | |
1043 | EXPORT_SYMBOL(snd_pcm_new); | |
1044 | EXPORT_SYMBOL(snd_pcm_new_stream); | |
1045 | EXPORT_SYMBOL(snd_pcm_notify); | |
1046 | EXPORT_SYMBOL(snd_pcm_open_substream); | |
1047 | EXPORT_SYMBOL(snd_pcm_release_substream); | |
1048 | EXPORT_SYMBOL(snd_pcm_format_name); | |
1049 | /* pcm_native.c */ | |
1050 | EXPORT_SYMBOL(snd_pcm_link_rwlock); | |
1051 | EXPORT_SYMBOL(snd_pcm_start); | |
1052 | #ifdef CONFIG_PM | |
1053 | EXPORT_SYMBOL(snd_pcm_suspend); | |
1054 | EXPORT_SYMBOL(snd_pcm_suspend_all); | |
1055 | #endif | |
1056 | EXPORT_SYMBOL(snd_pcm_kernel_playback_ioctl); | |
1057 | EXPORT_SYMBOL(snd_pcm_kernel_capture_ioctl); | |
1058 | EXPORT_SYMBOL(snd_pcm_kernel_ioctl); | |
1059 | EXPORT_SYMBOL(snd_pcm_mmap_data); | |
1060 | #if SNDRV_PCM_INFO_MMAP_IOMEM | |
1061 | EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem); | |
1062 | #endif | |
1063 | /* pcm_misc.c */ | |
1064 | EXPORT_SYMBOL(snd_pcm_format_signed); | |
1065 | EXPORT_SYMBOL(snd_pcm_format_unsigned); | |
1066 | EXPORT_SYMBOL(snd_pcm_format_linear); | |
1067 | EXPORT_SYMBOL(snd_pcm_format_little_endian); | |
1068 | EXPORT_SYMBOL(snd_pcm_format_big_endian); | |
1069 | EXPORT_SYMBOL(snd_pcm_format_width); | |
1070 | EXPORT_SYMBOL(snd_pcm_format_physical_width); | |
1071 | EXPORT_SYMBOL(snd_pcm_format_silence_64); | |
1072 | EXPORT_SYMBOL(snd_pcm_format_set_silence); | |
1073 | EXPORT_SYMBOL(snd_pcm_build_linear_format); | |
1074 | EXPORT_SYMBOL(snd_pcm_limit_hw_rates); |