blob: 8e018988551610574daece3988e78d53d1ca9c5d [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010026#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#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
33MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>");
34MODULE_DESCRIPTION("Midlevel PCM code for ALSA.");
35MODULE_LICENSE("GPL");
36
Clemens Ladischf87135f2005-11-20 14:06:59 +010037static LIST_HEAD(snd_pcm_devices);
Linus Torvalds1da177e2005-04-16 15:20:36 -070038static LIST_HEAD(snd_pcm_notify_list);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010039static DEFINE_MUTEX(register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
Takashi Iwai877211f2005-11-17 13:59:38 +010041static int snd_pcm_free(struct snd_pcm *pcm);
42static int snd_pcm_dev_free(struct snd_device *device);
43static int snd_pcm_dev_register(struct snd_device *device);
44static int snd_pcm_dev_disconnect(struct snd_device *device);
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
Clemens Ladischf87135f2005-11-20 14:06:59 +010046static struct snd_pcm *snd_pcm_search(struct snd_card *card, int device)
47{
48 struct list_head *p;
49 struct snd_pcm *pcm;
50
51 list_for_each(p, &snd_pcm_devices) {
52 pcm = list_entry(p, struct snd_pcm, list);
53 if (pcm->card == card && pcm->device == device)
54 return pcm;
55 }
56 return NULL;
57}
58
Takashi Iwai877211f2005-11-17 13:59:38 +010059static int snd_pcm_control_ioctl(struct snd_card *card,
60 struct snd_ctl_file *control,
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 unsigned int cmd, unsigned long arg)
62{
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 switch (cmd) {
64 case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE:
65 {
66 int device;
67
68 if (get_user(device, (int __user *)arg))
69 return -EFAULT;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010070 mutex_lock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 device = device < 0 ? 0 : device + 1;
72 while (device < SNDRV_PCM_DEVICES) {
Clemens Ladischf87135f2005-11-20 14:06:59 +010073 if (snd_pcm_search(card, device))
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 break;
75 device++;
76 }
77 if (device == SNDRV_PCM_DEVICES)
78 device = -1;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +010079 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 if (put_user(device, (int __user *)arg))
81 return -EFAULT;
82 return 0;
83 }
84 case SNDRV_CTL_IOCTL_PCM_INFO:
85 {
Takashi Iwai877211f2005-11-17 13:59:38 +010086 struct snd_pcm_info __user *info;
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 unsigned int device, subdevice;
Takashi Iwai877211f2005-11-17 13:59:38 +010088 int stream;
89 struct snd_pcm *pcm;
90 struct snd_pcm_str *pstr;
91 struct snd_pcm_substream *substream;
Clemens Ladischf87135f2005-11-20 14:06:59 +010092 int err;
93
Takashi Iwai877211f2005-11-17 13:59:38 +010094 info = (struct snd_pcm_info __user *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 if (get_user(device, &info->device))
96 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 if (get_user(stream, &info->stream))
98 return -EFAULT;
99 if (stream < 0 || stream > 1)
100 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 if (get_user(subdevice, &info->subdevice))
102 return -EFAULT;
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100103 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100104 pcm = snd_pcm_search(card, device);
105 if (pcm == NULL) {
106 err = -ENXIO;
107 goto _error;
108 }
109 pstr = &pcm->streams[stream];
110 if (pstr->substream_count == 0) {
111 err = -ENOENT;
112 goto _error;
113 }
114 if (subdevice >= pstr->substream_count) {
115 err = -ENXIO;
116 goto _error;
117 }
118 for (substream = pstr->substream; substream;
119 substream = substream->next)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 if (substream->number == (int)subdevice)
121 break;
Clemens Ladischf87135f2005-11-20 14:06:59 +0100122 if (substream == NULL) {
123 err = -ENXIO;
124 goto _error;
125 }
126 err = snd_pcm_info_user(substream, info);
127 _error:
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100128 mutex_unlock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100129 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 }
131 case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE:
132 {
133 int val;
134
135 if (get_user(val, (int __user *)arg))
136 return -EFAULT;
137 control->prefer_pcm_subdevice = val;
138 return 0;
139 }
140 }
141 return -ENOIOCTLCMD;
142}
Jaroslav Kysela21a34792006-01-13 09:12:11 +0100143
Takashi Iwaib7d90a32006-04-25 12:56:04 +0200144#ifdef CONFIG_SND_VERBOSE_PROCFS
Jaroslav Kysela21a34792006-01-13 09:12:11 +0100145
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146#define STATE(v) [SNDRV_PCM_STATE_##v] = #v
147#define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v
148#define READY(v) [SNDRV_PCM_READY_##v] = #v
149#define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v
150#define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v
151#define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v
152#define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v
153#define START(v) [SNDRV_PCM_START_##v] = #v
154#define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v
155#define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v
156
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157static char *snd_pcm_format_names[] = {
158 FORMAT(S8),
159 FORMAT(U8),
160 FORMAT(S16_LE),
161 FORMAT(S16_BE),
162 FORMAT(U16_LE),
163 FORMAT(U16_BE),
164 FORMAT(S24_LE),
165 FORMAT(S24_BE),
166 FORMAT(U24_LE),
167 FORMAT(U24_BE),
168 FORMAT(S32_LE),
169 FORMAT(S32_BE),
170 FORMAT(U32_LE),
171 FORMAT(U32_BE),
172 FORMAT(FLOAT_LE),
173 FORMAT(FLOAT_BE),
174 FORMAT(FLOAT64_LE),
175 FORMAT(FLOAT64_BE),
176 FORMAT(IEC958_SUBFRAME_LE),
177 FORMAT(IEC958_SUBFRAME_BE),
178 FORMAT(MU_LAW),
179 FORMAT(A_LAW),
180 FORMAT(IMA_ADPCM),
181 FORMAT(MPEG),
182 FORMAT(GSM),
183 FORMAT(SPECIAL),
184 FORMAT(S24_3LE),
185 FORMAT(S24_3BE),
186 FORMAT(U24_3LE),
187 FORMAT(U24_3BE),
188 FORMAT(S20_3LE),
189 FORMAT(S20_3BE),
190 FORMAT(U20_3LE),
191 FORMAT(U20_3BE),
192 FORMAT(S18_3LE),
193 FORMAT(S18_3BE),
194 FORMAT(U18_3LE),
195 FORMAT(U18_3BE),
196};
197
Adrian Bunk12831c12006-04-11 11:12:46 +0200198static const char *snd_pcm_format_name(snd_pcm_format_t format)
Takashi Iwaie28563c2005-12-01 10:42:42 +0100199{
200 return snd_pcm_format_names[format];
201}
202
Takashi Iwaie28563c2005-12-01 10:42:42 +0100203static char *snd_pcm_stream_names[] = {
204 STREAM(PLAYBACK),
205 STREAM(CAPTURE),
206};
207
208static char *snd_pcm_state_names[] = {
209 STATE(OPEN),
210 STATE(SETUP),
211 STATE(PREPARED),
212 STATE(RUNNING),
213 STATE(XRUN),
214 STATE(DRAINING),
215 STATE(PAUSED),
216 STATE(SUSPENDED),
217};
218
219static char *snd_pcm_access_names[] = {
220 ACCESS(MMAP_INTERLEAVED),
221 ACCESS(MMAP_NONINTERLEAVED),
222 ACCESS(MMAP_COMPLEX),
223 ACCESS(RW_INTERLEAVED),
224 ACCESS(RW_NONINTERLEAVED),
225};
226
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227static char *snd_pcm_subformat_names[] = {
228 SUBFORMAT(STD),
229};
230
231static char *snd_pcm_tstamp_mode_names[] = {
232 TSTAMP(NONE),
233 TSTAMP(MMAP),
234};
235
Takashi Iwai877211f2005-11-17 13:59:38 +0100236static const char *snd_pcm_stream_name(int stream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237{
238 snd_assert(stream <= SNDRV_PCM_STREAM_LAST, return NULL);
239 return snd_pcm_stream_names[stream];
240}
241
242static const char *snd_pcm_access_name(snd_pcm_access_t access)
243{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 return snd_pcm_access_names[access];
245}
246
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat)
248{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 return snd_pcm_subformat_names[subformat];
250}
251
Takashi Iwai877211f2005-11-17 13:59:38 +0100252static const char *snd_pcm_tstamp_mode_name(int mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253{
254 snd_assert(mode <= SNDRV_PCM_TSTAMP_LAST, return NULL);
255 return snd_pcm_tstamp_mode_names[mode];
256}
257
258static const char *snd_pcm_state_name(snd_pcm_state_t state)
259{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 return snd_pcm_state_names[state];
261}
262
263#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
264#include <linux/soundcard.h>
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100265
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266static const char *snd_pcm_oss_format_name(int format)
267{
268 switch (format) {
269 case AFMT_MU_LAW:
270 return "MU_LAW";
271 case AFMT_A_LAW:
272 return "A_LAW";
273 case AFMT_IMA_ADPCM:
274 return "IMA_ADPCM";
275 case AFMT_U8:
276 return "U8";
277 case AFMT_S16_LE:
278 return "S16_LE";
279 case AFMT_S16_BE:
280 return "S16_BE";
281 case AFMT_S8:
282 return "S8";
283 case AFMT_U16_LE:
284 return "U16_LE";
285 case AFMT_U16_BE:
286 return "U16_BE";
287 case AFMT_MPEG:
288 return "MPEG";
289 default:
290 return "unknown";
291 }
292}
293#endif
294
Takashi Iwai877211f2005-11-17 13:59:38 +0100295static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream,
296 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297{
Takashi Iwai877211f2005-11-17 13:59:38 +0100298 struct snd_pcm_info *info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 int err;
300
Takashi Iwai7c22f1a2005-10-10 11:46:31 +0200301 if (! substream)
302 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
304 info = kmalloc(sizeof(*info), GFP_KERNEL);
305 if (! info) {
306 printk(KERN_DEBUG "snd_pcm_proc_info_read: cannot malloc\n");
307 return;
308 }
309
310 err = snd_pcm_info(substream, info);
311 if (err < 0) {
312 snd_iprintf(buffer, "error %d\n", err);
313 kfree(info);
314 return;
315 }
316 snd_iprintf(buffer, "card: %d\n", info->card);
317 snd_iprintf(buffer, "device: %d\n", info->device);
318 snd_iprintf(buffer, "subdevice: %d\n", info->subdevice);
319 snd_iprintf(buffer, "stream: %s\n", snd_pcm_stream_name(info->stream));
320 snd_iprintf(buffer, "id: %s\n", info->id);
321 snd_iprintf(buffer, "name: %s\n", info->name);
322 snd_iprintf(buffer, "subname: %s\n", info->subname);
323 snd_iprintf(buffer, "class: %d\n", info->dev_class);
324 snd_iprintf(buffer, "subclass: %d\n", info->dev_subclass);
325 snd_iprintf(buffer, "subdevices_count: %d\n", info->subdevices_count);
326 snd_iprintf(buffer, "subdevices_avail: %d\n", info->subdevices_avail);
327 kfree(info);
328}
329
Takashi Iwai877211f2005-11-17 13:59:38 +0100330static void snd_pcm_stream_proc_info_read(struct snd_info_entry *entry,
331 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332{
Takashi Iwai877211f2005-11-17 13:59:38 +0100333 snd_pcm_proc_info_read(((struct snd_pcm_str *)entry->private_data)->substream,
334 buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335}
336
Takashi Iwai877211f2005-11-17 13:59:38 +0100337static void snd_pcm_substream_proc_info_read(struct snd_info_entry *entry,
338 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339{
Takashi Iwai877211f2005-11-17 13:59:38 +0100340 snd_pcm_proc_info_read((struct snd_pcm_substream *)entry->private_data,
341 buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342}
343
Takashi Iwai877211f2005-11-17 13:59:38 +0100344static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry *entry,
345 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346{
Takashi Iwai877211f2005-11-17 13:59:38 +0100347 struct snd_pcm_substream *substream = entry->private_data;
348 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 if (!runtime) {
350 snd_iprintf(buffer, "closed\n");
351 return;
352 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
354 snd_iprintf(buffer, "no setup\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 return;
356 }
357 snd_iprintf(buffer, "access: %s\n", snd_pcm_access_name(runtime->access));
358 snd_iprintf(buffer, "format: %s\n", snd_pcm_format_name(runtime->format));
359 snd_iprintf(buffer, "subformat: %s\n", snd_pcm_subformat_name(runtime->subformat));
360 snd_iprintf(buffer, "channels: %u\n", runtime->channels);
361 snd_iprintf(buffer, "rate: %u (%u/%u)\n", runtime->rate, runtime->rate_num, runtime->rate_den);
362 snd_iprintf(buffer, "period_size: %lu\n", runtime->period_size);
363 snd_iprintf(buffer, "buffer_size: %lu\n", runtime->buffer_size);
364 snd_iprintf(buffer, "tick_time: %u\n", runtime->tick_time);
365#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
366 if (substream->oss.oss) {
367 snd_iprintf(buffer, "OSS format: %s\n", snd_pcm_oss_format_name(runtime->oss.format));
368 snd_iprintf(buffer, "OSS channels: %u\n", runtime->oss.channels);
369 snd_iprintf(buffer, "OSS rate: %u\n", runtime->oss.rate);
370 snd_iprintf(buffer, "OSS period bytes: %lu\n", (unsigned long)runtime->oss.period_bytes);
371 snd_iprintf(buffer, "OSS periods: %u\n", runtime->oss.periods);
372 snd_iprintf(buffer, "OSS period frames: %lu\n", (unsigned long)runtime->oss.period_frames);
373 }
374#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375}
376
Takashi Iwai877211f2005-11-17 13:59:38 +0100377static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry *entry,
378 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379{
Takashi Iwai877211f2005-11-17 13:59:38 +0100380 struct snd_pcm_substream *substream = entry->private_data;
381 struct snd_pcm_runtime *runtime = substream->runtime;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 if (!runtime) {
383 snd_iprintf(buffer, "closed\n");
384 return;
385 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
387 snd_iprintf(buffer, "no setup\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 return;
389 }
390 snd_iprintf(buffer, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime->tstamp_mode));
391 snd_iprintf(buffer, "period_step: %u\n", runtime->period_step);
392 snd_iprintf(buffer, "sleep_min: %u\n", runtime->sleep_min);
393 snd_iprintf(buffer, "avail_min: %lu\n", runtime->control->avail_min);
394 snd_iprintf(buffer, "xfer_align: %lu\n", runtime->xfer_align);
395 snd_iprintf(buffer, "start_threshold: %lu\n", runtime->start_threshold);
396 snd_iprintf(buffer, "stop_threshold: %lu\n", runtime->stop_threshold);
397 snd_iprintf(buffer, "silence_threshold: %lu\n", runtime->silence_threshold);
398 snd_iprintf(buffer, "silence_size: %lu\n", runtime->silence_size);
399 snd_iprintf(buffer, "boundary: %lu\n", runtime->boundary);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400}
401
Takashi Iwai877211f2005-11-17 13:59:38 +0100402static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry,
403 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404{
Takashi Iwai877211f2005-11-17 13:59:38 +0100405 struct snd_pcm_substream *substream = entry->private_data;
406 struct snd_pcm_runtime *runtime = substream->runtime;
407 struct snd_pcm_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 int err;
409 if (!runtime) {
410 snd_iprintf(buffer, "closed\n");
411 return;
412 }
413 memset(&status, 0, sizeof(status));
414 err = snd_pcm_status(substream, &status);
415 if (err < 0) {
416 snd_iprintf(buffer, "error %d\n", err);
417 return;
418 }
419 snd_iprintf(buffer, "state: %s\n", snd_pcm_state_name(status.state));
420 snd_iprintf(buffer, "trigger_time: %ld.%09ld\n",
421 status.trigger_tstamp.tv_sec, status.trigger_tstamp.tv_nsec);
422 snd_iprintf(buffer, "tstamp : %ld.%09ld\n",
423 status.tstamp.tv_sec, status.tstamp.tv_nsec);
424 snd_iprintf(buffer, "delay : %ld\n", status.delay);
425 snd_iprintf(buffer, "avail : %ld\n", status.avail);
426 snd_iprintf(buffer, "avail_max : %ld\n", status.avail_max);
427 snd_iprintf(buffer, "-----\n");
428 snd_iprintf(buffer, "hw_ptr : %ld\n", runtime->status->hw_ptr);
429 snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr);
430}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
Jaroslav Kysela61fb63c2006-04-24 21:57:16 +0200432#ifdef CONFIG_SND_PCM_XRUN_DEBUG
Takashi Iwai877211f2005-11-17 13:59:38 +0100433static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry,
434 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435{
Takashi Iwai877211f2005-11-17 13:59:38 +0100436 struct snd_pcm_str *pstr = entry->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 snd_iprintf(buffer, "%d\n", pstr->xrun_debug);
438}
439
Takashi Iwai877211f2005-11-17 13:59:38 +0100440static void snd_pcm_xrun_debug_write(struct snd_info_entry *entry,
441 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442{
Takashi Iwai877211f2005-11-17 13:59:38 +0100443 struct snd_pcm_str *pstr = entry->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 char line[64];
445 if (!snd_info_get_line(buffer, line, sizeof(line)))
446 pstr->xrun_debug = simple_strtoul(line, NULL, 10);
447}
448#endif
449
Takashi Iwai877211f2005-11-17 13:59:38 +0100450static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451{
Takashi Iwai877211f2005-11-17 13:59:38 +0100452 struct snd_pcm *pcm = pstr->pcm;
453 struct snd_info_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 char name[16];
455
456 sprintf(name, "pcm%i%c", pcm->device,
457 pstr->stream == SNDRV_PCM_STREAM_PLAYBACK ? 'p' : 'c');
458 if ((entry = snd_info_create_card_entry(pcm->card, name, pcm->card->proc_root)) == NULL)
459 return -ENOMEM;
460 entry->mode = S_IFDIR | S_IRUGO | S_IXUGO;
461 if (snd_info_register(entry) < 0) {
462 snd_info_free_entry(entry);
463 return -ENOMEM;
464 }
465 pstr->proc_root = entry;
466
467 if ((entry = snd_info_create_card_entry(pcm->card, "info", pstr->proc_root)) != NULL) {
Takashi Iwaibf850202006-04-28 15:13:41 +0200468 snd_info_set_text_ops(entry, pstr, snd_pcm_stream_proc_info_read);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 if (snd_info_register(entry) < 0) {
470 snd_info_free_entry(entry);
471 entry = NULL;
472 }
473 }
474 pstr->proc_info_entry = entry;
475
Jaroslav Kysela61fb63c2006-04-24 21:57:16 +0200476#ifdef CONFIG_SND_PCM_XRUN_DEBUG
Takashi Iwai877211f2005-11-17 13:59:38 +0100477 if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug",
478 pstr->proc_root)) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 entry->c.text.read = snd_pcm_xrun_debug_read;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 entry->c.text.write = snd_pcm_xrun_debug_write;
Takashi Iwaibd7bf042005-04-12 16:27:28 +0200481 entry->mode |= S_IWUSR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 entry->private_data = pstr;
483 if (snd_info_register(entry) < 0) {
484 snd_info_free_entry(entry);
485 entry = NULL;
486 }
487 }
488 pstr->proc_xrun_debug_entry = entry;
489#endif
490 return 0;
491}
492
Takashi Iwai877211f2005-11-17 13:59:38 +0100493static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494{
Jaroslav Kysela61fb63c2006-04-24 21:57:16 +0200495#ifdef CONFIG_SND_PCM_XRUN_DEBUG
Takashi Iwai746d4a02006-06-23 14:37:59 +0200496 snd_info_free_entry(pstr->proc_xrun_debug_entry);
497 pstr->proc_xrun_debug_entry = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498#endif
Takashi Iwai746d4a02006-06-23 14:37:59 +0200499 snd_info_free_entry(pstr->proc_info_entry);
500 pstr->proc_info_entry = NULL;
501 snd_info_free_entry(pstr->proc_root);
502 pstr->proc_root = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 return 0;
504}
505
Takashi Iwai877211f2005-11-17 13:59:38 +0100506static int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507{
Takashi Iwai877211f2005-11-17 13:59:38 +0100508 struct snd_info_entry *entry;
509 struct snd_card *card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 char name[16];
511
512 card = substream->pcm->card;
513
514 sprintf(name, "sub%i", substream->number);
515 if ((entry = snd_info_create_card_entry(card, name, substream->pstr->proc_root)) == NULL)
516 return -ENOMEM;
517 entry->mode = S_IFDIR | S_IRUGO | S_IXUGO;
518 if (snd_info_register(entry) < 0) {
519 snd_info_free_entry(entry);
520 return -ENOMEM;
521 }
522 substream->proc_root = entry;
523
524 if ((entry = snd_info_create_card_entry(card, "info", substream->proc_root)) != NULL) {
Takashi Iwaibf850202006-04-28 15:13:41 +0200525 snd_info_set_text_ops(entry, substream,
526 snd_pcm_substream_proc_info_read);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 if (snd_info_register(entry) < 0) {
528 snd_info_free_entry(entry);
529 entry = NULL;
530 }
531 }
532 substream->proc_info_entry = entry;
533
534 if ((entry = snd_info_create_card_entry(card, "hw_params", substream->proc_root)) != NULL) {
Takashi Iwaibf850202006-04-28 15:13:41 +0200535 snd_info_set_text_ops(entry, substream,
536 snd_pcm_substream_proc_hw_params_read);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 if (snd_info_register(entry) < 0) {
538 snd_info_free_entry(entry);
539 entry = NULL;
540 }
541 }
542 substream->proc_hw_params_entry = entry;
543
544 if ((entry = snd_info_create_card_entry(card, "sw_params", substream->proc_root)) != NULL) {
Takashi Iwaibf850202006-04-28 15:13:41 +0200545 snd_info_set_text_ops(entry, substream,
546 snd_pcm_substream_proc_sw_params_read);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 if (snd_info_register(entry) < 0) {
548 snd_info_free_entry(entry);
549 entry = NULL;
550 }
551 }
552 substream->proc_sw_params_entry = entry;
553
554 if ((entry = snd_info_create_card_entry(card, "status", substream->proc_root)) != NULL) {
Takashi Iwaibf850202006-04-28 15:13:41 +0200555 snd_info_set_text_ops(entry, substream,
556 snd_pcm_substream_proc_status_read);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 if (snd_info_register(entry) < 0) {
558 snd_info_free_entry(entry);
559 entry = NULL;
560 }
561 }
562 substream->proc_status_entry = entry;
563
564 return 0;
565}
Takashi Iwai746d4a02006-06-23 14:37:59 +0200566
Takashi Iwai877211f2005-11-17 13:59:38 +0100567static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568{
Takashi Iwai746d4a02006-06-23 14:37:59 +0200569 snd_info_free_entry(substream->proc_info_entry);
570 substream->proc_info_entry = NULL;
571 snd_info_free_entry(substream->proc_hw_params_entry);
572 substream->proc_hw_params_entry = NULL;
573 snd_info_free_entry(substream->proc_sw_params_entry);
574 substream->proc_sw_params_entry = NULL;
575 snd_info_free_entry(substream->proc_status_entry);
576 substream->proc_status_entry = NULL;
577 snd_info_free_entry(substream->proc_root);
578 substream->proc_root = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 return 0;
580}
Takashi Iwaib7d90a32006-04-25 12:56:04 +0200581#else /* !CONFIG_SND_VERBOSE_PROCFS */
Takashi Iwaie28563c2005-12-01 10:42:42 +0100582static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; }
583static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; }
584static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; }
585static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; }
Takashi Iwaib7d90a32006-04-25 12:56:04 +0200586#endif /* CONFIG_SND_VERBOSE_PROCFS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587
588/**
589 * snd_pcm_new_stream - create a new PCM stream
590 * @pcm: the pcm instance
591 * @stream: the stream direction, SNDRV_PCM_STREAM_XXX
592 * @substream_count: the number of substreams
593 *
594 * Creates a new stream for the pcm.
595 * The corresponding stream on the pcm must have been empty before
596 * calling this, i.e. zero must be given to the argument of
597 * snd_pcm_new().
598 *
599 * Returns zero if successful, or a negative error code on failure.
600 */
Takashi Iwai877211f2005-11-17 13:59:38 +0100601int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602{
603 int idx, err;
Takashi Iwai877211f2005-11-17 13:59:38 +0100604 struct snd_pcm_str *pstr = &pcm->streams[stream];
605 struct snd_pcm_substream *substream, *prev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606
607#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100608 mutex_init(&pstr->oss.setup_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609#endif
610 pstr->stream = stream;
611 pstr->pcm = pcm;
612 pstr->substream_count = substream_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 if (substream_count > 0) {
614 err = snd_pcm_stream_proc_init(pstr);
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100615 if (err < 0) {
616 snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 return err;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100618 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 }
620 prev = NULL;
621 for (idx = 0, prev = NULL; idx < substream_count; idx++) {
Takashi Iwaica2c0962005-09-09 14:20:23 +0200622 substream = kzalloc(sizeof(*substream), GFP_KERNEL);
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100623 if (substream == NULL) {
624 snd_printk(KERN_ERR "Cannot allocate PCM substream\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 return -ENOMEM;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100626 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 substream->pcm = pcm;
628 substream->pstr = pstr;
629 substream->number = idx;
630 substream->stream = stream;
631 sprintf(substream->name, "subdevice #%i", idx);
Takashi Iwai9442e692006-09-30 23:27:19 -0700632 snprintf(substream->latency_id, sizeof(substream->latency_id),
633 "ALSA-PCM%d-%d%c%d", pcm->card->number, pcm->device,
634 (stream ? 'c' : 'p'), idx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 substream->buffer_bytes_max = UINT_MAX;
636 if (prev == NULL)
637 pstr->substream = substream;
638 else
639 prev->next = substream;
640 err = snd_pcm_substream_proc_init(substream);
641 if (err < 0) {
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100642 snd_printk(KERN_ERR "Error in snd_pcm_stream_proc_init\n");
Akinobu Mita4d361282006-11-23 12:03:24 +0100643 if (prev == NULL)
644 pstr->substream = NULL;
645 else
646 prev->next = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 kfree(substream);
648 return err;
649 }
650 substream->group = &substream->self_group;
651 spin_lock_init(&substream->self_group.lock);
652 INIT_LIST_HEAD(&substream->self_group.substreams);
653 list_add_tail(&substream->link_list, &substream->self_group.substreams);
654 spin_lock_init(&substream->timer_lock);
Takashi Iwai9c323fc2006-04-28 15:13:41 +0200655 atomic_set(&substream->mmap_count, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 prev = substream;
657 }
658 return 0;
659}
660
Takashi Iwaie88e8ae62006-04-28 15:13:40 +0200661EXPORT_SYMBOL(snd_pcm_new_stream);
662
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663/**
664 * snd_pcm_new - create a new PCM instance
665 * @card: the card instance
666 * @id: the id string
667 * @device: the device index (zero based)
668 * @playback_count: the number of substreams for playback
669 * @capture_count: the number of substreams for capture
670 * @rpcm: the pointer to store the new pcm instance
671 *
672 * Creates a new PCM instance.
673 *
674 * The pcm operators have to be set afterwards to the new instance
675 * via snd_pcm_set_ops().
676 *
677 * Returns zero if successful, or a negative error code on failure.
678 */
Takashi Iwai877211f2005-11-17 13:59:38 +0100679int snd_pcm_new(struct snd_card *card, char *id, int device,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 int playback_count, int capture_count,
Takashi Iwai877211f2005-11-17 13:59:38 +0100681 struct snd_pcm ** rpcm)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682{
Takashi Iwai877211f2005-11-17 13:59:38 +0100683 struct snd_pcm *pcm;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 int err;
Takashi Iwai877211f2005-11-17 13:59:38 +0100685 static struct snd_device_ops ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686 .dev_free = snd_pcm_dev_free,
687 .dev_register = snd_pcm_dev_register,
688 .dev_disconnect = snd_pcm_dev_disconnect,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 };
690
691 snd_assert(rpcm != NULL, return -EINVAL);
692 *rpcm = NULL;
693 snd_assert(card != NULL, return -ENXIO);
Takashi Iwaica2c0962005-09-09 14:20:23 +0200694 pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100695 if (pcm == NULL) {
696 snd_printk(KERN_ERR "Cannot allocate PCM\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 return -ENOMEM;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100698 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 pcm->card = card;
700 pcm->device = device;
Takashi Iwai73e77ba2005-11-17 17:44:01 +0100701 if (id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 strlcpy(pcm->id, id, sizeof(pcm->id));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_PLAYBACK, playback_count)) < 0) {
704 snd_pcm_free(pcm);
705 return err;
706 }
707 if ((err = snd_pcm_new_stream(pcm, SNDRV_PCM_STREAM_CAPTURE, capture_count)) < 0) {
708 snd_pcm_free(pcm);
709 return err;
710 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100711 mutex_init(&pcm->open_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 init_waitqueue_head(&pcm->open_wait);
713 if ((err = snd_device_new(card, SNDRV_DEV_PCM, pcm, &ops)) < 0) {
714 snd_pcm_free(pcm);
715 return err;
716 }
717 *rpcm = pcm;
718 return 0;
719}
720
Takashi Iwaie88e8ae62006-04-28 15:13:40 +0200721EXPORT_SYMBOL(snd_pcm_new);
722
Takashi Iwai877211f2005-11-17 13:59:38 +0100723static void snd_pcm_free_stream(struct snd_pcm_str * pstr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724{
Takashi Iwai877211f2005-11-17 13:59:38 +0100725 struct snd_pcm_substream *substream, *substream_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
Takashi Iwai877211f2005-11-17 13:59:38 +0100727 struct snd_pcm_oss_setup *setup, *setupn;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728#endif
729 substream = pstr->substream;
730 while (substream) {
731 substream_next = substream->next;
Takashi Iwaic4614822006-06-23 14:38:23 +0200732 snd_pcm_timer_done(substream);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 snd_pcm_substream_proc_done(substream);
734 kfree(substream);
735 substream = substream_next;
736 }
737 snd_pcm_stream_proc_done(pstr);
738#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
739 for (setup = pstr->oss.setup_list; setup; setup = setupn) {
740 setupn = setup->next;
741 kfree(setup->task_name);
742 kfree(setup);
743 }
744#endif
745}
746
Takashi Iwai877211f2005-11-17 13:59:38 +0100747static int snd_pcm_free(struct snd_pcm *pcm)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748{
Takashi Iwaic4614822006-06-23 14:38:23 +0200749 struct snd_pcm_notify *notify;
750
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 snd_assert(pcm != NULL, return -ENXIO);
Takashi Iwaic4614822006-06-23 14:38:23 +0200752 list_for_each_entry(notify, &snd_pcm_notify_list, list) {
753 notify->n_unregister(pcm);
754 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 if (pcm->private_free)
756 pcm->private_free(pcm);
757 snd_pcm_lib_preallocate_free_for_all(pcm);
758 snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_PLAYBACK]);
759 snd_pcm_free_stream(&pcm->streams[SNDRV_PCM_STREAM_CAPTURE]);
760 kfree(pcm);
761 return 0;
762}
763
Takashi Iwai877211f2005-11-17 13:59:38 +0100764static int snd_pcm_dev_free(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765{
Takashi Iwai877211f2005-11-17 13:59:38 +0100766 struct snd_pcm *pcm = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 return snd_pcm_free(pcm);
768}
769
770static void snd_pcm_tick_timer_func(unsigned long data)
771{
Takashi Iwai877211f2005-11-17 13:59:38 +0100772 struct snd_pcm_substream *substream = (struct snd_pcm_substream *) data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 snd_pcm_tick_elapsed(substream);
774}
775
Takashi Iwai3bf75f92006-03-27 16:40:49 +0200776int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream,
777 struct file *file,
778 struct snd_pcm_substream **rsubstream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779{
Takashi Iwai877211f2005-11-17 13:59:38 +0100780 struct snd_pcm_str * pstr;
781 struct snd_pcm_substream *substream;
782 struct snd_pcm_runtime *runtime;
783 struct snd_ctl_file *kctl;
784 struct snd_card *card;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 struct list_head *list;
786 int prefer_subdevice = -1;
787 size_t size;
788
789 snd_assert(rsubstream != NULL, return -EINVAL);
790 *rsubstream = NULL;
791 snd_assert(pcm != NULL, return -ENXIO);
792 pstr = &pcm->streams[stream];
Takashi Iwai3bf75f92006-03-27 16:40:49 +0200793 if (pstr->substream == NULL || pstr->substream_count == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 return -ENODEV;
795
796 card = pcm->card;
797 down_read(&card->controls_rwsem);
798 list_for_each(list, &card->ctl_files) {
799 kctl = snd_ctl_file(list);
800 if (kctl->pid == current->pid) {
801 prefer_subdevice = kctl->prefer_pcm_subdevice;
Takashi Iwai2529bba2006-08-04 12:57:19 +0200802 if (prefer_subdevice != -1)
803 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 }
805 }
806 up_read(&card->controls_rwsem);
807
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 switch (stream) {
809 case SNDRV_PCM_STREAM_PLAYBACK:
810 if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) {
811 for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; substream; substream = substream->next) {
812 if (SUBSTREAM_BUSY(substream))
813 return -EAGAIN;
814 }
815 }
816 break;
817 case SNDRV_PCM_STREAM_CAPTURE:
818 if (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX) {
819 for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next) {
820 if (SUBSTREAM_BUSY(substream))
821 return -EAGAIN;
822 }
823 }
824 break;
825 default:
826 return -EINVAL;
827 }
828
Takashi Iwai0df63e42006-04-28 15:13:41 +0200829 if (file->f_flags & O_APPEND) {
830 if (prefer_subdevice < 0) {
831 if (pstr->substream_count > 1)
832 return -EINVAL; /* must be unique */
833 substream = pstr->substream;
834 } else {
835 for (substream = pstr->substream; substream;
836 substream = substream->next)
837 if (substream->number == prefer_subdevice)
838 break;
839 }
840 if (! substream)
841 return -ENODEV;
842 if (! SUBSTREAM_BUSY(substream))
843 return -EBADFD;
844 substream->ref_count++;
845 *rsubstream = substream;
846 return 0;
847 }
848
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849 if (prefer_subdevice >= 0) {
850 for (substream = pstr->substream; substream; substream = substream->next)
851 if (!SUBSTREAM_BUSY(substream) && substream->number == prefer_subdevice)
852 goto __ok;
853 }
854 for (substream = pstr->substream; substream; substream = substream->next)
855 if (!SUBSTREAM_BUSY(substream))
856 break;
857 __ok:
858 if (substream == NULL)
859 return -EAGAIN;
860
Takashi Iwaica2c0962005-09-09 14:20:23 +0200861 runtime = kzalloc(sizeof(*runtime), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 if (runtime == NULL)
863 return -ENOMEM;
864
Takashi Iwai877211f2005-11-17 13:59:38 +0100865 size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 runtime->status = snd_malloc_pages(size, GFP_KERNEL);
867 if (runtime->status == NULL) {
868 kfree(runtime);
869 return -ENOMEM;
870 }
871 memset((void*)runtime->status, 0, size);
872
Takashi Iwai877211f2005-11-17 13:59:38 +0100873 size = PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 runtime->control = snd_malloc_pages(size, GFP_KERNEL);
875 if (runtime->control == NULL) {
Takashi Iwai877211f2005-11-17 13:59:38 +0100876 snd_free_pages((void*)runtime->status,
877 PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 kfree(runtime);
879 return -ENOMEM;
880 }
881 memset((void*)runtime->control, 0, size);
882
883 init_waitqueue_head(&runtime->sleep);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 init_timer(&runtime->tick_timer);
885 runtime->tick_timer.function = snd_pcm_tick_timer_func;
886 runtime->tick_timer.data = (unsigned long) substream;
887
888 runtime->status->state = SNDRV_PCM_STATE_OPEN;
889
890 substream->runtime = runtime;
891 substream->private_data = pcm->private_data;
Takashi Iwai0df63e42006-04-28 15:13:41 +0200892 substream->ref_count = 1;
893 substream->f_flags = file->f_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 pstr->substream_opened++;
895 *rsubstream = substream;
896 return 0;
897}
898
Takashi Iwai3bf75f92006-03-27 16:40:49 +0200899void snd_pcm_detach_substream(struct snd_pcm_substream *substream)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900{
Takashi Iwai877211f2005-11-17 13:59:38 +0100901 struct snd_pcm_runtime *runtime;
Takashi Iwai0df63e42006-04-28 15:13:41 +0200902
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 runtime = substream->runtime;
904 snd_assert(runtime != NULL, return);
905 if (runtime->private_free != NULL)
906 runtime->private_free(runtime);
Takashi Iwai877211f2005-11-17 13:59:38 +0100907 snd_free_pages((void*)runtime->status,
908 PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)));
909 snd_free_pages((void*)runtime->control,
910 PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 kfree(runtime->hw_constraints.rules);
912 kfree(runtime);
913 substream->runtime = NULL;
914 substream->pstr->substream_opened--;
915}
916
Greg Kroah-Hartmand80f19f2006-08-07 22:19:37 -0700917static ssize_t show_pcm_class(struct device *dev,
918 struct device_attribute *attr, char *buf)
Takashi Iwai9d19f482006-09-06 14:27:46 +0200919{
920 struct snd_pcm *pcm;
921 const char *str;
922 static const char *strs[SNDRV_PCM_CLASS_LAST + 1] = {
923 [SNDRV_PCM_CLASS_GENERIC] = "generic",
924 [SNDRV_PCM_CLASS_MULTI] = "multi",
925 [SNDRV_PCM_CLASS_MODEM] = "modem",
926 [SNDRV_PCM_CLASS_DIGITIZER] = "digitizer",
927 };
928
Greg Kroah-Hartmand80f19f2006-08-07 22:19:37 -0700929 if (! (pcm = dev_get_drvdata(dev)) ||
Takashi Iwai9d19f482006-09-06 14:27:46 +0200930 pcm->dev_class > SNDRV_PCM_CLASS_LAST)
931 str = "none";
932 else
933 str = strs[pcm->dev_class];
934 return snprintf(buf, PAGE_SIZE, "%s\n", str);
935}
936
Greg Kroah-Hartmand80f19f2006-08-07 22:19:37 -0700937static struct device_attribute pcm_attrs =
Takashi Iwai9d19f482006-09-06 14:27:46 +0200938 __ATTR(pcm_class, S_IRUGO, show_pcm_class, NULL);
939
Takashi Iwai877211f2005-11-17 13:59:38 +0100940static int snd_pcm_dev_register(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941{
Clemens Ladischf87135f2005-11-20 14:06:59 +0100942 int cidx, err;
Takashi Iwai877211f2005-11-17 13:59:38 +0100943 struct snd_pcm_substream *substream;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 struct list_head *list;
945 char str[16];
Takashi Iwai877211f2005-11-17 13:59:38 +0100946 struct snd_pcm *pcm = device->device_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947
948 snd_assert(pcm != NULL && device != NULL, return -ENXIO);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100949 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +0100950 if (snd_pcm_search(pcm->card, pcm->device)) {
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100951 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952 return -EBUSY;
953 }
Clemens Ladischf87135f2005-11-20 14:06:59 +0100954 list_add_tail(&pcm->list, &snd_pcm_devices);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 for (cidx = 0; cidx < 2; cidx++) {
956 int devtype = -1;
957 if (pcm->streams[cidx].substream == NULL)
958 continue;
959 switch (cidx) {
960 case SNDRV_PCM_STREAM_PLAYBACK:
961 sprintf(str, "pcmC%iD%ip", pcm->card->number, pcm->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK;
963 break;
964 case SNDRV_PCM_STREAM_CAPTURE:
965 sprintf(str, "pcmC%iD%ic", pcm->card->number, pcm->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE;
967 break;
968 }
Clemens Ladisch2af677f2005-11-20 14:03:48 +0100969 if ((err = snd_register_device(devtype, pcm->card,
970 pcm->device,
Clemens Ladischf87135f2005-11-20 14:06:59 +0100971 &snd_pcm_f_ops[cidx],
972 pcm, str)) < 0)
Clemens Ladisch2af677f2005-11-20 14:03:48 +0100973 {
Clemens Ladischf87135f2005-11-20 14:06:59 +0100974 list_del(&pcm->list);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100975 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 return err;
977 }
Takashi Iwai9d19f482006-09-06 14:27:46 +0200978 snd_add_device_sysfs_file(devtype, pcm->card, pcm->device,
979 &pcm_attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 for (substream = pcm->streams[cidx].substream; substream; substream = substream->next)
981 snd_pcm_timer_init(substream);
982 }
983 list_for_each(list, &snd_pcm_notify_list) {
Takashi Iwai877211f2005-11-17 13:59:38 +0100984 struct snd_pcm_notify *notify;
985 notify = list_entry(list, struct snd_pcm_notify, list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 notify->n_register(pcm);
987 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100988 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 return 0;
990}
991
Takashi Iwai877211f2005-11-17 13:59:38 +0100992static int snd_pcm_dev_disconnect(struct snd_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993{
Takashi Iwai877211f2005-11-17 13:59:38 +0100994 struct snd_pcm *pcm = device->device_data;
Takashi Iwaic4614822006-06-23 14:38:23 +0200995 struct snd_pcm_notify *notify;
Takashi Iwai877211f2005-11-17 13:59:38 +0100996 struct snd_pcm_substream *substream;
Takashi Iwaic4614822006-06-23 14:38:23 +0200997 int cidx, devtype;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998
Ingo Molnar1a60d4c2006-01-16 16:29:08 +0100999 mutex_lock(&register_mutex);
Takashi Iwaic4614822006-06-23 14:38:23 +02001000 if (list_empty(&pcm->list))
1001 goto unlock;
1002
Clemens Ladischf87135f2005-11-20 14:06:59 +01001003 list_del_init(&pcm->list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 for (cidx = 0; cidx < 2; cidx++)
1005 for (substream = pcm->streams[cidx].substream; substream; substream = substream->next)
1006 if (substream->runtime)
1007 substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED;
Takashi Iwaic4614822006-06-23 14:38:23 +02001008 list_for_each_entry(notify, &snd_pcm_notify_list, list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009 notify->n_disconnect(pcm);
1010 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011 for (cidx = 0; cidx < 2; cidx++) {
1012 devtype = -1;
1013 switch (cidx) {
1014 case SNDRV_PCM_STREAM_PLAYBACK:
1015 devtype = SNDRV_DEVICE_TYPE_PCM_PLAYBACK;
1016 break;
1017 case SNDRV_PCM_STREAM_CAPTURE:
1018 devtype = SNDRV_DEVICE_TYPE_PCM_CAPTURE;
1019 break;
1020 }
1021 snd_unregister_device(devtype, pcm->card, pcm->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 }
Takashi Iwaic4614822006-06-23 14:38:23 +02001023 unlock:
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001024 mutex_unlock(&register_mutex);
Takashi Iwaic4614822006-06-23 14:38:23 +02001025 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026}
1027
Takashi Iwai877211f2005-11-17 13:59:38 +01001028int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029{
Clemens Ladischf87135f2005-11-20 14:06:59 +01001030 struct list_head *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031
Takashi Iwaic4614822006-06-23 14:38:23 +02001032 snd_assert(notify != NULL &&
1033 notify->n_register != NULL &&
1034 notify->n_unregister != NULL &&
1035 notify->n_disconnect, return -EINVAL);
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001036 mutex_lock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037 if (nfree) {
1038 list_del(&notify->list);
Clemens Ladischf87135f2005-11-20 14:06:59 +01001039 list_for_each(p, &snd_pcm_devices)
1040 notify->n_unregister(list_entry(p,
1041 struct snd_pcm, list));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 } else {
1043 list_add_tail(&notify->list, &snd_pcm_notify_list);
Clemens Ladischf87135f2005-11-20 14:06:59 +01001044 list_for_each(p, &snd_pcm_devices)
1045 notify->n_register(list_entry(p, struct snd_pcm, list));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001047 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 return 0;
1049}
1050
Takashi Iwaie88e8ae62006-04-28 15:13:40 +02001051EXPORT_SYMBOL(snd_pcm_notify);
1052
Takashi Iwaie28563c2005-12-01 10:42:42 +01001053#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054/*
1055 * Info interface
1056 */
1057
Takashi Iwai877211f2005-11-17 13:59:38 +01001058static void snd_pcm_proc_read(struct snd_info_entry *entry,
1059 struct snd_info_buffer *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060{
Clemens Ladischf87135f2005-11-20 14:06:59 +01001061 struct list_head *p;
Takashi Iwai877211f2005-11-17 13:59:38 +01001062 struct snd_pcm *pcm;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001064 mutex_lock(&register_mutex);
Clemens Ladischf87135f2005-11-20 14:06:59 +01001065 list_for_each(p, &snd_pcm_devices) {
1066 pcm = list_entry(p, struct snd_pcm, list);
1067 snd_iprintf(buffer, "%02i-%02i: %s : %s",
1068 pcm->card->number, pcm->device, pcm->id, pcm->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069 if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream)
Takashi Iwai877211f2005-11-17 13:59:38 +01001070 snd_iprintf(buffer, " : playback %i",
1071 pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream)
Takashi Iwai877211f2005-11-17 13:59:38 +01001073 snd_iprintf(buffer, " : capture %i",
1074 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 snd_iprintf(buffer, "\n");
1076 }
Ingo Molnar1a60d4c2006-01-16 16:29:08 +01001077 mutex_unlock(&register_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078}
1079
Takashi Iwai6581f4e2006-05-17 17:14:51 +02001080static struct snd_info_entry *snd_pcm_proc_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081
Takashi Iwaie28563c2005-12-01 10:42:42 +01001082static void snd_pcm_proc_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083{
Takashi Iwai877211f2005-11-17 13:59:38 +01001084 struct snd_info_entry *entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) {
Takashi Iwaibf850202006-04-28 15:13:41 +02001087 snd_info_set_text_ops(entry, NULL, snd_pcm_proc_read);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 if (snd_info_register(entry) < 0) {
1089 snd_info_free_entry(entry);
1090 entry = NULL;
1091 }
1092 }
1093 snd_pcm_proc_entry = entry;
Takashi Iwaie28563c2005-12-01 10:42:42 +01001094}
1095
1096static void snd_pcm_proc_done(void)
1097{
Takashi Iwai746d4a02006-06-23 14:37:59 +02001098 snd_info_free_entry(snd_pcm_proc_entry);
Takashi Iwaie28563c2005-12-01 10:42:42 +01001099}
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
1111static 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();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 return 0;
1117}
1118
1119static 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);
Takashi Iwaie28563c2005-12-01 10:42:42 +01001123 snd_pcm_proc_done();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124}
1125
1126module_init(alsa_pcm_init)
1127module_exit(alsa_pcm_exit)