2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
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.
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.
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
22 #include <sound/driver.h>
23 #include <linux/init.h>
24 #include <linux/slab.h>
25 #include <linux/time.h>
26 #include <linux/mutex.h>
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>
33 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>");
34 MODULE_DESCRIPTION("Midlevel PCM code for ALSA.");
35 MODULE_LICENSE("GPL");
37 static LIST_HEAD(snd_pcm_devices
);
38 static LIST_HEAD(snd_pcm_notify_list
);
39 static DEFINE_MUTEX(register_mutex
);
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
);
45 static int snd_pcm_dev_unregister(struct snd_device
*device
);
47 static struct snd_pcm
*snd_pcm_search(struct snd_card
*card
, int device
)
52 list_for_each(p
, &snd_pcm_devices
) {
53 pcm
= list_entry(p
, struct snd_pcm
, list
);
54 if (pcm
->card
== card
&& pcm
->device
== device
)
60 static int snd_pcm_control_ioctl(struct snd_card
*card
,
61 struct snd_ctl_file
*control
,
62 unsigned int cmd
, unsigned long arg
)
65 case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE
:
69 if (get_user(device
, (int __user
*)arg
))
71 mutex_lock(®ister_mutex
);
72 device
= device
< 0 ? 0 : device
+ 1;
73 while (device
< SNDRV_PCM_DEVICES
) {
74 if (snd_pcm_search(card
, device
))
78 if (device
== SNDRV_PCM_DEVICES
)
80 mutex_unlock(®ister_mutex
);
81 if (put_user(device
, (int __user
*)arg
))
85 case SNDRV_CTL_IOCTL_PCM_INFO
:
87 struct snd_pcm_info __user
*info
;
88 unsigned int device
, subdevice
;
91 struct snd_pcm_str
*pstr
;
92 struct snd_pcm_substream
*substream
;
95 info
= (struct snd_pcm_info __user
*)arg
;
96 if (get_user(device
, &info
->device
))
98 if (get_user(stream
, &info
->stream
))
100 if (stream
< 0 || stream
> 1)
102 if (get_user(subdevice
, &info
->subdevice
))
104 mutex_lock(®ister_mutex
);
105 pcm
= snd_pcm_search(card
, device
);
110 pstr
= &pcm
->streams
[stream
];
111 if (pstr
->substream_count
== 0) {
115 if (subdevice
>= pstr
->substream_count
) {
119 for (substream
= pstr
->substream
; substream
;
120 substream
= substream
->next
)
121 if (substream
->number
== (int)subdevice
)
123 if (substream
== NULL
) {
127 err
= snd_pcm_info_user(substream
, info
);
129 mutex_unlock(®ister_mutex
);
132 case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE
:
136 if (get_user(val
, (int __user
*)arg
))
138 control
->prefer_pcm_subdevice
= val
;
145 #ifdef CONFIG_SND_VERBOSE_PROCFS
147 #define STATE(v) [SNDRV_PCM_STATE_##v] = #v
148 #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v
149 #define READY(v) [SNDRV_PCM_READY_##v] = #v
150 #define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v
151 #define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v
152 #define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v
153 #define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v
154 #define START(v) [SNDRV_PCM_START_##v] = #v
155 #define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v
156 #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v
158 static char *snd_pcm_format_names
[] = {
177 FORMAT(IEC958_SUBFRAME_LE
),
178 FORMAT(IEC958_SUBFRAME_BE
),
199 static const char *snd_pcm_format_name(snd_pcm_format_t format
)
201 return snd_pcm_format_names
[format
];
204 static char *snd_pcm_stream_names
[] = {
209 static char *snd_pcm_state_names
[] = {
220 static char *snd_pcm_access_names
[] = {
221 ACCESS(MMAP_INTERLEAVED
),
222 ACCESS(MMAP_NONINTERLEAVED
),
223 ACCESS(MMAP_COMPLEX
),
224 ACCESS(RW_INTERLEAVED
),
225 ACCESS(RW_NONINTERLEAVED
),
228 static char *snd_pcm_subformat_names
[] = {
232 static char *snd_pcm_tstamp_mode_names
[] = {
237 static const char *snd_pcm_stream_name(int stream
)
239 snd_assert(stream
<= SNDRV_PCM_STREAM_LAST
, return NULL
);
240 return snd_pcm_stream_names
[stream
];
243 static const char *snd_pcm_access_name(snd_pcm_access_t access
)
245 return snd_pcm_access_names
[access
];
248 static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat
)
250 return snd_pcm_subformat_names
[subformat
];
253 static const char *snd_pcm_tstamp_mode_name(int mode
)
255 snd_assert(mode
<= SNDRV_PCM_TSTAMP_LAST
, return NULL
);
256 return snd_pcm_tstamp_mode_names
[mode
];
259 static const char *snd_pcm_state_name(snd_pcm_state_t state
)
261 return snd_pcm_state_names
[state
];
264 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
265 #include <linux/soundcard.h>
267 static const char *snd_pcm_oss_format_name(int format
)
296 static void snd_pcm_proc_info_read(struct snd_pcm_substream
*substream
,
297 struct snd_info_buffer
*buffer
)
299 struct snd_pcm_info
*info
;
305 info
= kmalloc(sizeof(*info
), GFP_KERNEL
);
307 printk(KERN_DEBUG
"snd_pcm_proc_info_read: cannot malloc\n");
311 err
= snd_pcm_info(substream
, info
);
313 snd_iprintf(buffer
, "error %d\n", err
);
317 snd_iprintf(buffer
, "card: %d\n", info
->card
);
318 snd_iprintf(buffer
, "device: %d\n", info
->device
);
319 snd_iprintf(buffer
, "subdevice: %d\n", info
->subdevice
);
320 snd_iprintf(buffer
, "stream: %s\n", snd_pcm_stream_name(info
->stream
));
321 snd_iprintf(buffer
, "id: %s\n", info
->id
);
322 snd_iprintf(buffer
, "name: %s\n", info
->name
);
323 snd_iprintf(buffer
, "subname: %s\n", info
->subname
);
324 snd_iprintf(buffer
, "class: %d\n", info
->dev_class
);
325 snd_iprintf(buffer
, "subclass: %d\n", info
->dev_subclass
);
326 snd_iprintf(buffer
, "subdevices_count: %d\n", info
->subdevices_count
);
327 snd_iprintf(buffer
, "subdevices_avail: %d\n", info
->subdevices_avail
);
331 static void snd_pcm_stream_proc_info_read(struct snd_info_entry
*entry
,
332 struct snd_info_buffer
*buffer
)
334 snd_pcm_proc_info_read(((struct snd_pcm_str
*)entry
->private_data
)->substream
,
338 static void snd_pcm_substream_proc_info_read(struct snd_info_entry
*entry
,
339 struct snd_info_buffer
*buffer
)
341 snd_pcm_proc_info_read((struct snd_pcm_substream
*)entry
->private_data
,
345 static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry
*entry
,
346 struct snd_info_buffer
*buffer
)
348 struct snd_pcm_substream
*substream
= entry
->private_data
;
349 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
351 snd_iprintf(buffer
, "closed\n");
354 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
355 snd_iprintf(buffer
, "no setup\n");
358 snd_iprintf(buffer
, "access: %s\n", snd_pcm_access_name(runtime
->access
));
359 snd_iprintf(buffer
, "format: %s\n", snd_pcm_format_name(runtime
->format
));
360 snd_iprintf(buffer
, "subformat: %s\n", snd_pcm_subformat_name(runtime
->subformat
));
361 snd_iprintf(buffer
, "channels: %u\n", runtime
->channels
);
362 snd_iprintf(buffer
, "rate: %u (%u/%u)\n", runtime
->rate
, runtime
->rate_num
, runtime
->rate_den
);
363 snd_iprintf(buffer
, "period_size: %lu\n", runtime
->period_size
);
364 snd_iprintf(buffer
, "buffer_size: %lu\n", runtime
->buffer_size
);
365 snd_iprintf(buffer
, "tick_time: %u\n", runtime
->tick_time
);
366 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
367 if (substream
->oss
.oss
) {
368 snd_iprintf(buffer
, "OSS format: %s\n", snd_pcm_oss_format_name(runtime
->oss
.format
));
369 snd_iprintf(buffer
, "OSS channels: %u\n", runtime
->oss
.channels
);
370 snd_iprintf(buffer
, "OSS rate: %u\n", runtime
->oss
.rate
);
371 snd_iprintf(buffer
, "OSS period bytes: %lu\n", (unsigned long)runtime
->oss
.period_bytes
);
372 snd_iprintf(buffer
, "OSS periods: %u\n", runtime
->oss
.periods
);
373 snd_iprintf(buffer
, "OSS period frames: %lu\n", (unsigned long)runtime
->oss
.period_frames
);
378 static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry
*entry
,
379 struct snd_info_buffer
*buffer
)
381 struct snd_pcm_substream
*substream
= entry
->private_data
;
382 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
384 snd_iprintf(buffer
, "closed\n");
387 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
388 snd_iprintf(buffer
, "no setup\n");
391 snd_iprintf(buffer
, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime
->tstamp_mode
));
392 snd_iprintf(buffer
, "period_step: %u\n", runtime
->period_step
);
393 snd_iprintf(buffer
, "sleep_min: %u\n", runtime
->sleep_min
);
394 snd_iprintf(buffer
, "avail_min: %lu\n", runtime
->control
->avail_min
);
395 snd_iprintf(buffer
, "xfer_align: %lu\n", runtime
->xfer_align
);
396 snd_iprintf(buffer
, "start_threshold: %lu\n", runtime
->start_threshold
);
397 snd_iprintf(buffer
, "stop_threshold: %lu\n", runtime
->stop_threshold
);
398 snd_iprintf(buffer
, "silence_threshold: %lu\n", runtime
->silence_threshold
);
399 snd_iprintf(buffer
, "silence_size: %lu\n", runtime
->silence_size
);
400 snd_iprintf(buffer
, "boundary: %lu\n", runtime
->boundary
);
403 static void snd_pcm_substream_proc_status_read(struct snd_info_entry
*entry
,
404 struct snd_info_buffer
*buffer
)
406 struct snd_pcm_substream
*substream
= entry
->private_data
;
407 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
408 struct snd_pcm_status status
;
411 snd_iprintf(buffer
, "closed\n");
414 memset(&status
, 0, sizeof(status
));
415 err
= snd_pcm_status(substream
, &status
);
417 snd_iprintf(buffer
, "error %d\n", err
);
420 snd_iprintf(buffer
, "state: %s\n", snd_pcm_state_name(status
.state
));
421 snd_iprintf(buffer
, "trigger_time: %ld.%09ld\n",
422 status
.trigger_tstamp
.tv_sec
, status
.trigger_tstamp
.tv_nsec
);
423 snd_iprintf(buffer
, "tstamp : %ld.%09ld\n",
424 status
.tstamp
.tv_sec
, status
.tstamp
.tv_nsec
);
425 snd_iprintf(buffer
, "delay : %ld\n", status
.delay
);
426 snd_iprintf(buffer
, "avail : %ld\n", status
.avail
);
427 snd_iprintf(buffer
, "avail_max : %ld\n", status
.avail_max
);
428 snd_iprintf(buffer
, "-----\n");
429 snd_iprintf(buffer
, "hw_ptr : %ld\n", runtime
->status
->hw_ptr
);
430 snd_iprintf(buffer
, "appl_ptr : %ld\n", runtime
->control
->appl_ptr
);
433 #ifdef CONFIG_SND_PCM_XRUN_DEBUG
434 static void snd_pcm_xrun_debug_read(struct snd_info_entry
*entry
,
435 struct snd_info_buffer
*buffer
)
437 struct snd_pcm_str
*pstr
= entry
->private_data
;
438 snd_iprintf(buffer
, "%d\n", pstr
->xrun_debug
);
441 static void snd_pcm_xrun_debug_write(struct snd_info_entry
*entry
,
442 struct snd_info_buffer
*buffer
)
444 struct snd_pcm_str
*pstr
= entry
->private_data
;
446 if (!snd_info_get_line(buffer
, line
, sizeof(line
)))
447 pstr
->xrun_debug
= simple_strtoul(line
, NULL
, 10);
451 static int snd_pcm_stream_proc_init(struct snd_pcm_str
*pstr
)
453 struct snd_pcm
*pcm
= pstr
->pcm
;
454 struct snd_info_entry
*entry
;
457 sprintf(name
, "pcm%i%c", pcm
->device
,
458 pstr
->stream
== SNDRV_PCM_STREAM_PLAYBACK
? 'p' : 'c');
459 if ((entry
= snd_info_create_card_entry(pcm
->card
, name
, pcm
->card
->proc_root
)) == NULL
)
461 entry
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
462 if (snd_info_register(entry
) < 0) {
463 snd_info_free_entry(entry
);
466 pstr
->proc_root
= entry
;
468 if ((entry
= snd_info_create_card_entry(pcm
->card
, "info", pstr
->proc_root
)) != NULL
) {
469 snd_info_set_text_ops(entry
, pstr
, snd_pcm_stream_proc_info_read
);
470 if (snd_info_register(entry
) < 0) {
471 snd_info_free_entry(entry
);
475 pstr
->proc_info_entry
= entry
;
477 #ifdef CONFIG_SND_PCM_XRUN_DEBUG
478 if ((entry
= snd_info_create_card_entry(pcm
->card
, "xrun_debug",
479 pstr
->proc_root
)) != NULL
) {
480 entry
->c
.text
.read
= snd_pcm_xrun_debug_read
;
481 entry
->c
.text
.write
= snd_pcm_xrun_debug_write
;
482 entry
->mode
|= S_IWUSR
;
483 entry
->private_data
= pstr
;
484 if (snd_info_register(entry
) < 0) {
485 snd_info_free_entry(entry
);
489 pstr
->proc_xrun_debug_entry
= entry
;
494 static int snd_pcm_stream_proc_done(struct snd_pcm_str
*pstr
)
496 #ifdef CONFIG_SND_PCM_XRUN_DEBUG
497 if (pstr
->proc_xrun_debug_entry
) {
498 snd_info_unregister(pstr
->proc_xrun_debug_entry
);
499 pstr
->proc_xrun_debug_entry
= NULL
;
502 if (pstr
->proc_info_entry
) {
503 snd_info_unregister(pstr
->proc_info_entry
);
504 pstr
->proc_info_entry
= NULL
;
506 if (pstr
->proc_root
) {
507 snd_info_unregister(pstr
->proc_root
);
508 pstr
->proc_root
= NULL
;
513 static int snd_pcm_substream_proc_init(struct snd_pcm_substream
*substream
)
515 struct snd_info_entry
*entry
;
516 struct snd_card
*card
;
519 card
= substream
->pcm
->card
;
521 sprintf(name
, "sub%i", substream
->number
);
522 if ((entry
= snd_info_create_card_entry(card
, name
, substream
->pstr
->proc_root
)) == NULL
)
524 entry
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
525 if (snd_info_register(entry
) < 0) {
526 snd_info_free_entry(entry
);
529 substream
->proc_root
= entry
;
531 if ((entry
= snd_info_create_card_entry(card
, "info", substream
->proc_root
)) != NULL
) {
532 snd_info_set_text_ops(entry
, substream
,
533 snd_pcm_substream_proc_info_read
);
534 if (snd_info_register(entry
) < 0) {
535 snd_info_free_entry(entry
);
539 substream
->proc_info_entry
= entry
;
541 if ((entry
= snd_info_create_card_entry(card
, "hw_params", substream
->proc_root
)) != NULL
) {
542 snd_info_set_text_ops(entry
, substream
,
543 snd_pcm_substream_proc_hw_params_read
);
544 if (snd_info_register(entry
) < 0) {
545 snd_info_free_entry(entry
);
549 substream
->proc_hw_params_entry
= entry
;
551 if ((entry
= snd_info_create_card_entry(card
, "sw_params", substream
->proc_root
)) != NULL
) {
552 snd_info_set_text_ops(entry
, substream
,
553 snd_pcm_substream_proc_sw_params_read
);
554 if (snd_info_register(entry
) < 0) {
555 snd_info_free_entry(entry
);
559 substream
->proc_sw_params_entry
= entry
;
561 if ((entry
= snd_info_create_card_entry(card
, "status", substream
->proc_root
)) != NULL
) {
562 snd_info_set_text_ops(entry
, substream
,
563 snd_pcm_substream_proc_status_read
);
564 if (snd_info_register(entry
) < 0) {
565 snd_info_free_entry(entry
);
569 substream
->proc_status_entry
= entry
;
574 static int snd_pcm_substream_proc_done(struct snd_pcm_substream
*substream
)
576 if (substream
->proc_info_entry
) {
577 snd_info_unregister(substream
->proc_info_entry
);
578 substream
->proc_info_entry
= NULL
;
580 if (substream
->proc_hw_params_entry
) {
581 snd_info_unregister(substream
->proc_hw_params_entry
);
582 substream
->proc_hw_params_entry
= NULL
;
584 if (substream
->proc_sw_params_entry
) {
585 snd_info_unregister(substream
->proc_sw_params_entry
);
586 substream
->proc_sw_params_entry
= NULL
;
588 if (substream
->proc_status_entry
) {
589 snd_info_unregister(substream
->proc_status_entry
);
590 substream
->proc_status_entry
= NULL
;
592 if (substream
->proc_root
) {
593 snd_info_unregister(substream
->proc_root
);
594 substream
->proc_root
= NULL
;
598 #else /* !CONFIG_SND_VERBOSE_PROCFS */
599 static inline int snd_pcm_stream_proc_init(struct snd_pcm_str
*pstr
) { return 0; }
600 static inline int snd_pcm_stream_proc_done(struct snd_pcm_str
*pstr
) { return 0; }
601 static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream
*substream
) { return 0; }
602 static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream
*substream
) { return 0; }
603 #endif /* CONFIG_SND_VERBOSE_PROCFS */
606 * snd_pcm_new_stream - create a new PCM stream
607 * @pcm: the pcm instance
608 * @stream: the stream direction, SNDRV_PCM_STREAM_XXX
609 * @substream_count: the number of substreams
611 * Creates a new stream for the pcm.
612 * The corresponding stream on the pcm must have been empty before
613 * calling this, i.e. zero must be given to the argument of
616 * Returns zero if successful, or a negative error code on failure.
618 int snd_pcm_new_stream(struct snd_pcm
*pcm
, int stream
, int substream_count
)
621 struct snd_pcm_str
*pstr
= &pcm
->streams
[stream
];
622 struct snd_pcm_substream
*substream
, *prev
;
624 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
625 mutex_init(&pstr
->oss
.setup_mutex
);
627 pstr
->stream
= stream
;
629 pstr
->substream_count
= substream_count
;
630 if (substream_count
> 0) {
631 err
= snd_pcm_stream_proc_init(pstr
);
633 snd_printk(KERN_ERR
"Error in snd_pcm_stream_proc_init\n");
638 for (idx
= 0, prev
= NULL
; idx
< substream_count
; idx
++) {
639 substream
= kzalloc(sizeof(*substream
), GFP_KERNEL
);
640 if (substream
== NULL
) {
641 snd_printk(KERN_ERR
"Cannot allocate PCM substream\n");
644 substream
->pcm
= pcm
;
645 substream
->pstr
= pstr
;
646 substream
->number
= idx
;
647 substream
->stream
= stream
;
648 sprintf(substream
->name
, "subdevice #%i", idx
);
649 substream
->buffer_bytes_max
= UINT_MAX
;
651 pstr
->substream
= substream
;
653 prev
->next
= substream
;
654 err
= snd_pcm_substream_proc_init(substream
);
656 snd_printk(KERN_ERR
"Error in snd_pcm_stream_proc_init\n");
660 substream
->group
= &substream
->self_group
;
661 spin_lock_init(&substream
->self_group
.lock
);
662 INIT_LIST_HEAD(&substream
->self_group
.substreams
);
663 list_add_tail(&substream
->link_list
, &substream
->self_group
.substreams
);
664 spin_lock_init(&substream
->timer_lock
);
670 EXPORT_SYMBOL(snd_pcm_new_stream
);
673 * snd_pcm_new - create a new PCM instance
674 * @card: the card instance
676 * @device: the device index (zero based)
677 * @playback_count: the number of substreams for playback
678 * @capture_count: the number of substreams for capture
679 * @rpcm: the pointer to store the new pcm instance
681 * Creates a new PCM instance.
683 * The pcm operators have to be set afterwards to the new instance
684 * via snd_pcm_set_ops().
686 * Returns zero if successful, or a negative error code on failure.
688 int snd_pcm_new(struct snd_card
*card
, char *id
, int device
,
689 int playback_count
, int capture_count
,
690 struct snd_pcm
** rpcm
)
694 static struct snd_device_ops ops
= {
695 .dev_free
= snd_pcm_dev_free
,
696 .dev_register
= snd_pcm_dev_register
,
697 .dev_disconnect
= snd_pcm_dev_disconnect
,
698 .dev_unregister
= snd_pcm_dev_unregister
701 snd_assert(rpcm
!= NULL
, return -EINVAL
);
703 snd_assert(card
!= NULL
, return -ENXIO
);
704 pcm
= kzalloc(sizeof(*pcm
), GFP_KERNEL
);
706 snd_printk(KERN_ERR
"Cannot allocate PCM\n");
710 pcm
->device
= device
;
712 strlcpy(pcm
->id
, id
, sizeof(pcm
->id
));
713 if ((err
= snd_pcm_new_stream(pcm
, SNDRV_PCM_STREAM_PLAYBACK
, playback_count
)) < 0) {
717 if ((err
= snd_pcm_new_stream(pcm
, SNDRV_PCM_STREAM_CAPTURE
, capture_count
)) < 0) {
721 mutex_init(&pcm
->open_mutex
);
722 init_waitqueue_head(&pcm
->open_wait
);
723 if ((err
= snd_device_new(card
, SNDRV_DEV_PCM
, pcm
, &ops
)) < 0) {
731 EXPORT_SYMBOL(snd_pcm_new
);
733 static void snd_pcm_free_stream(struct snd_pcm_str
* pstr
)
735 struct snd_pcm_substream
*substream
, *substream_next
;
736 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
737 struct snd_pcm_oss_setup
*setup
, *setupn
;
739 substream
= pstr
->substream
;
741 substream_next
= substream
->next
;
742 snd_pcm_substream_proc_done(substream
);
744 substream
= substream_next
;
746 snd_pcm_stream_proc_done(pstr
);
747 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
748 for (setup
= pstr
->oss
.setup_list
; setup
; setup
= setupn
) {
749 setupn
= setup
->next
;
750 kfree(setup
->task_name
);
756 static int snd_pcm_free(struct snd_pcm
*pcm
)
758 snd_assert(pcm
!= NULL
, return -ENXIO
);
759 if (pcm
->private_free
)
760 pcm
->private_free(pcm
);
761 snd_pcm_lib_preallocate_free_for_all(pcm
);
762 snd_pcm_free_stream(&pcm
->streams
[SNDRV_PCM_STREAM_PLAYBACK
]);
763 snd_pcm_free_stream(&pcm
->streams
[SNDRV_PCM_STREAM_CAPTURE
]);
768 static int snd_pcm_dev_free(struct snd_device
*device
)
770 struct snd_pcm
*pcm
= device
->device_data
;
771 return snd_pcm_free(pcm
);
774 static void snd_pcm_tick_timer_func(unsigned long data
)
776 struct snd_pcm_substream
*substream
= (struct snd_pcm_substream
*) data
;
777 snd_pcm_tick_elapsed(substream
);
780 int snd_pcm_attach_substream(struct snd_pcm
*pcm
, int stream
,
782 struct snd_pcm_substream
**rsubstream
)
784 struct snd_pcm_str
* pstr
;
785 struct snd_pcm_substream
*substream
;
786 struct snd_pcm_runtime
*runtime
;
787 struct snd_ctl_file
*kctl
;
788 struct snd_card
*card
;
789 struct list_head
*list
;
790 int prefer_subdevice
= -1;
793 snd_assert(rsubstream
!= NULL
, return -EINVAL
);
795 snd_assert(pcm
!= NULL
, return -ENXIO
);
796 pstr
= &pcm
->streams
[stream
];
797 if (pstr
->substream
== NULL
|| pstr
->substream_count
== 0)
801 down_read(&card
->controls_rwsem
);
802 list_for_each(list
, &card
->ctl_files
) {
803 kctl
= snd_ctl_file(list
);
804 if (kctl
->pid
== current
->pid
) {
805 prefer_subdevice
= kctl
->prefer_pcm_subdevice
;
809 up_read(&card
->controls_rwsem
);
812 case SNDRV_PCM_STREAM_PLAYBACK
:
813 if (pcm
->info_flags
& SNDRV_PCM_INFO_HALF_DUPLEX
) {
814 for (substream
= pcm
->streams
[SNDRV_PCM_STREAM_CAPTURE
].substream
; substream
; substream
= substream
->next
) {
815 if (SUBSTREAM_BUSY(substream
))
820 case SNDRV_PCM_STREAM_CAPTURE
:
821 if (pcm
->info_flags
& SNDRV_PCM_INFO_HALF_DUPLEX
) {
822 for (substream
= pcm
->streams
[SNDRV_PCM_STREAM_PLAYBACK
].substream
; substream
; substream
= substream
->next
) {
823 if (SUBSTREAM_BUSY(substream
))
832 if (prefer_subdevice
>= 0) {
833 for (substream
= pstr
->substream
; substream
; substream
= substream
->next
)
834 if (!SUBSTREAM_BUSY(substream
) && substream
->number
== prefer_subdevice
)
837 for (substream
= pstr
->substream
; substream
; substream
= substream
->next
)
838 if (!SUBSTREAM_BUSY(substream
))
841 if (substream
== NULL
)
844 runtime
= kzalloc(sizeof(*runtime
), GFP_KERNEL
);
848 size
= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
));
849 runtime
->status
= snd_malloc_pages(size
, GFP_KERNEL
);
850 if (runtime
->status
== NULL
) {
854 memset((void*)runtime
->status
, 0, size
);
856 size
= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
));
857 runtime
->control
= snd_malloc_pages(size
, GFP_KERNEL
);
858 if (runtime
->control
== NULL
) {
859 snd_free_pages((void*)runtime
->status
,
860 PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)));
864 memset((void*)runtime
->control
, 0, size
);
866 init_waitqueue_head(&runtime
->sleep
);
867 atomic_set(&runtime
->mmap_count
, 0);
868 init_timer(&runtime
->tick_timer
);
869 runtime
->tick_timer
.function
= snd_pcm_tick_timer_func
;
870 runtime
->tick_timer
.data
= (unsigned long) substream
;
872 runtime
->status
->state
= SNDRV_PCM_STATE_OPEN
;
874 substream
->runtime
= runtime
;
875 substream
->private_data
= pcm
->private_data
;
876 substream
->ffile
= file
;
877 pstr
->substream_opened
++;
878 *rsubstream
= substream
;
882 void snd_pcm_detach_substream(struct snd_pcm_substream
*substream
)
884 struct snd_pcm_runtime
*runtime
;
885 substream
->file
= NULL
;
886 runtime
= substream
->runtime
;
887 snd_assert(runtime
!= NULL
, return);
888 if (runtime
->private_free
!= NULL
)
889 runtime
->private_free(runtime
);
890 snd_free_pages((void*)runtime
->status
,
891 PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)));
892 snd_free_pages((void*)runtime
->control
,
893 PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
)));
894 kfree(runtime
->hw_constraints
.rules
);
896 substream
->runtime
= NULL
;
897 substream
->pstr
->substream_opened
--;
900 static int snd_pcm_dev_register(struct snd_device
*device
)
903 struct snd_pcm_substream
*substream
;
904 struct list_head
*list
;
906 struct snd_pcm
*pcm
= device
->device_data
;
908 snd_assert(pcm
!= NULL
&& device
!= NULL
, return -ENXIO
);
909 mutex_lock(®ister_mutex
);
910 if (snd_pcm_search(pcm
->card
, pcm
->device
)) {
911 mutex_unlock(®ister_mutex
);
914 list_add_tail(&pcm
->list
, &snd_pcm_devices
);
915 for (cidx
= 0; cidx
< 2; cidx
++) {
917 if (pcm
->streams
[cidx
].substream
== NULL
)
920 case SNDRV_PCM_STREAM_PLAYBACK
:
921 sprintf(str
, "pcmC%iD%ip", pcm
->card
->number
, pcm
->device
);
922 devtype
= SNDRV_DEVICE_TYPE_PCM_PLAYBACK
;
924 case SNDRV_PCM_STREAM_CAPTURE
:
925 sprintf(str
, "pcmC%iD%ic", pcm
->card
->number
, pcm
->device
);
926 devtype
= SNDRV_DEVICE_TYPE_PCM_CAPTURE
;
929 if ((err
= snd_register_device(devtype
, pcm
->card
,
931 &snd_pcm_f_ops
[cidx
],
934 list_del(&pcm
->list
);
935 mutex_unlock(®ister_mutex
);
938 for (substream
= pcm
->streams
[cidx
].substream
; substream
; substream
= substream
->next
)
939 snd_pcm_timer_init(substream
);
941 list_for_each(list
, &snd_pcm_notify_list
) {
942 struct snd_pcm_notify
*notify
;
943 notify
= list_entry(list
, struct snd_pcm_notify
, list
);
944 notify
->n_register(pcm
);
946 mutex_unlock(®ister_mutex
);
950 static int snd_pcm_dev_disconnect(struct snd_device
*device
)
952 struct snd_pcm
*pcm
= device
->device_data
;
953 struct list_head
*list
;
954 struct snd_pcm_substream
*substream
;
957 mutex_lock(®ister_mutex
);
958 list_del_init(&pcm
->list
);
959 for (cidx
= 0; cidx
< 2; cidx
++)
960 for (substream
= pcm
->streams
[cidx
].substream
; substream
; substream
= substream
->next
)
961 if (substream
->runtime
)
962 substream
->runtime
->status
->state
= SNDRV_PCM_STATE_DISCONNECTED
;
963 list_for_each(list
, &snd_pcm_notify_list
) {
964 struct snd_pcm_notify
*notify
;
965 notify
= list_entry(list
, struct snd_pcm_notify
, list
);
966 notify
->n_disconnect(pcm
);
968 mutex_unlock(®ister_mutex
);
972 static int snd_pcm_dev_unregister(struct snd_device
*device
)
975 struct snd_pcm_substream
*substream
;
976 struct list_head
*list
;
977 struct snd_pcm
*pcm
= device
->device_data
;
979 snd_assert(pcm
!= NULL
, return -ENXIO
);
980 mutex_lock(®ister_mutex
);
981 list_del(&pcm
->list
);
982 for (cidx
= 0; cidx
< 2; cidx
++) {
985 case SNDRV_PCM_STREAM_PLAYBACK
:
986 devtype
= SNDRV_DEVICE_TYPE_PCM_PLAYBACK
;
988 case SNDRV_PCM_STREAM_CAPTURE
:
989 devtype
= SNDRV_DEVICE_TYPE_PCM_CAPTURE
;
992 snd_unregister_device(devtype
, pcm
->card
, pcm
->device
);
993 for (substream
= pcm
->streams
[cidx
].substream
; substream
; substream
= substream
->next
)
994 snd_pcm_timer_done(substream
);
996 list_for_each(list
, &snd_pcm_notify_list
) {
997 struct snd_pcm_notify
*notify
;
998 notify
= list_entry(list
, struct snd_pcm_notify
, list
);
999 notify
->n_unregister(pcm
);
1001 mutex_unlock(®ister_mutex
);
1002 return snd_pcm_free(pcm
);
1005 int snd_pcm_notify(struct snd_pcm_notify
*notify
, int nfree
)
1007 struct list_head
*p
;
1009 snd_assert(notify
!= NULL
&& notify
->n_register
!= NULL
&& notify
->n_unregister
!= NULL
, return -EINVAL
);
1010 mutex_lock(®ister_mutex
);
1012 list_del(¬ify
->list
);
1013 list_for_each(p
, &snd_pcm_devices
)
1014 notify
->n_unregister(list_entry(p
,
1015 struct snd_pcm
, list
));
1017 list_add_tail(¬ify
->list
, &snd_pcm_notify_list
);
1018 list_for_each(p
, &snd_pcm_devices
)
1019 notify
->n_register(list_entry(p
, struct snd_pcm
, list
));
1021 mutex_unlock(®ister_mutex
);
1025 EXPORT_SYMBOL(snd_pcm_notify
);
1027 #ifdef CONFIG_PROC_FS
1032 static void snd_pcm_proc_read(struct snd_info_entry
*entry
,
1033 struct snd_info_buffer
*buffer
)
1035 struct list_head
*p
;
1036 struct snd_pcm
*pcm
;
1038 mutex_lock(®ister_mutex
);
1039 list_for_each(p
, &snd_pcm_devices
) {
1040 pcm
= list_entry(p
, struct snd_pcm
, list
);
1041 snd_iprintf(buffer
, "%02i-%02i: %s : %s",
1042 pcm
->card
->number
, pcm
->device
, pcm
->id
, pcm
->name
);
1043 if (pcm
->streams
[SNDRV_PCM_STREAM_PLAYBACK
].substream
)
1044 snd_iprintf(buffer
, " : playback %i",
1045 pcm
->streams
[SNDRV_PCM_STREAM_PLAYBACK
].substream_count
);
1046 if (pcm
->streams
[SNDRV_PCM_STREAM_CAPTURE
].substream
)
1047 snd_iprintf(buffer
, " : capture %i",
1048 pcm
->streams
[SNDRV_PCM_STREAM_CAPTURE
].substream_count
);
1049 snd_iprintf(buffer
, "\n");
1051 mutex_unlock(®ister_mutex
);
1054 static struct snd_info_entry
*snd_pcm_proc_entry
= NULL
;
1056 static void snd_pcm_proc_init(void)
1058 struct snd_info_entry
*entry
;
1060 if ((entry
= snd_info_create_module_entry(THIS_MODULE
, "pcm", NULL
)) != NULL
) {
1061 snd_info_set_text_ops(entry
, NULL
, snd_pcm_proc_read
);
1062 if (snd_info_register(entry
) < 0) {
1063 snd_info_free_entry(entry
);
1067 snd_pcm_proc_entry
= entry
;
1070 static void snd_pcm_proc_done(void)
1072 if (snd_pcm_proc_entry
)
1073 snd_info_unregister(snd_pcm_proc_entry
);
1076 #else /* !CONFIG_PROC_FS */
1077 #define snd_pcm_proc_init()
1078 #define snd_pcm_proc_done()
1079 #endif /* CONFIG_PROC_FS */
1086 static int __init
alsa_pcm_init(void)
1088 snd_ctl_register_ioctl(snd_pcm_control_ioctl
);
1089 snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl
);
1090 snd_pcm_proc_init();
1094 static void __exit
alsa_pcm_exit(void)
1096 snd_ctl_unregister_ioctl(snd_pcm_control_ioctl
);
1097 snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl
);
1098 snd_pcm_proc_done();
1101 module_init(alsa_pcm_init
)
1102 module_exit(alsa_pcm_exit
)