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 snd_pcm_stream_lock_irq(substream
);
355 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
356 snd_iprintf(buffer
, "no setup\n");
357 snd_pcm_stream_unlock_irq(substream
);
360 snd_iprintf(buffer
, "access: %s\n", snd_pcm_access_name(runtime
->access
));
361 snd_iprintf(buffer
, "format: %s\n", snd_pcm_format_name(runtime
->format
));
362 snd_iprintf(buffer
, "subformat: %s\n", snd_pcm_subformat_name(runtime
->subformat
));
363 snd_iprintf(buffer
, "channels: %u\n", runtime
->channels
);
364 snd_iprintf(buffer
, "rate: %u (%u/%u)\n", runtime
->rate
, runtime
->rate_num
, runtime
->rate_den
);
365 snd_iprintf(buffer
, "period_size: %lu\n", runtime
->period_size
);
366 snd_iprintf(buffer
, "buffer_size: %lu\n", runtime
->buffer_size
);
367 snd_iprintf(buffer
, "tick_time: %u\n", runtime
->tick_time
);
368 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
369 if (substream
->oss
.oss
) {
370 snd_iprintf(buffer
, "OSS format: %s\n", snd_pcm_oss_format_name(runtime
->oss
.format
));
371 snd_iprintf(buffer
, "OSS channels: %u\n", runtime
->oss
.channels
);
372 snd_iprintf(buffer
, "OSS rate: %u\n", runtime
->oss
.rate
);
373 snd_iprintf(buffer
, "OSS period bytes: %lu\n", (unsigned long)runtime
->oss
.period_bytes
);
374 snd_iprintf(buffer
, "OSS periods: %u\n", runtime
->oss
.periods
);
375 snd_iprintf(buffer
, "OSS period frames: %lu\n", (unsigned long)runtime
->oss
.period_frames
);
378 snd_pcm_stream_unlock_irq(substream
);
381 static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry
*entry
,
382 struct snd_info_buffer
*buffer
)
384 struct snd_pcm_substream
*substream
= entry
->private_data
;
385 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
387 snd_iprintf(buffer
, "closed\n");
390 snd_pcm_stream_lock_irq(substream
);
391 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
392 snd_iprintf(buffer
, "no setup\n");
393 snd_pcm_stream_unlock_irq(substream
);
396 snd_iprintf(buffer
, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime
->tstamp_mode
));
397 snd_iprintf(buffer
, "period_step: %u\n", runtime
->period_step
);
398 snd_iprintf(buffer
, "sleep_min: %u\n", runtime
->sleep_min
);
399 snd_iprintf(buffer
, "avail_min: %lu\n", runtime
->control
->avail_min
);
400 snd_iprintf(buffer
, "xfer_align: %lu\n", runtime
->xfer_align
);
401 snd_iprintf(buffer
, "start_threshold: %lu\n", runtime
->start_threshold
);
402 snd_iprintf(buffer
, "stop_threshold: %lu\n", runtime
->stop_threshold
);
403 snd_iprintf(buffer
, "silence_threshold: %lu\n", runtime
->silence_threshold
);
404 snd_iprintf(buffer
, "silence_size: %lu\n", runtime
->silence_size
);
405 snd_iprintf(buffer
, "boundary: %lu\n", runtime
->boundary
);
406 snd_pcm_stream_unlock_irq(substream
);
409 static void snd_pcm_substream_proc_status_read(struct snd_info_entry
*entry
,
410 struct snd_info_buffer
*buffer
)
412 struct snd_pcm_substream
*substream
= entry
->private_data
;
413 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
414 struct snd_pcm_status status
;
417 snd_iprintf(buffer
, "closed\n");
420 memset(&status
, 0, sizeof(status
));
421 err
= snd_pcm_status(substream
, &status
);
423 snd_iprintf(buffer
, "error %d\n", err
);
426 snd_iprintf(buffer
, "state: %s\n", snd_pcm_state_name(status
.state
));
427 snd_iprintf(buffer
, "trigger_time: %ld.%09ld\n",
428 status
.trigger_tstamp
.tv_sec
, status
.trigger_tstamp
.tv_nsec
);
429 snd_iprintf(buffer
, "tstamp : %ld.%09ld\n",
430 status
.tstamp
.tv_sec
, status
.tstamp
.tv_nsec
);
431 snd_iprintf(buffer
, "delay : %ld\n", status
.delay
);
432 snd_iprintf(buffer
, "avail : %ld\n", status
.avail
);
433 snd_iprintf(buffer
, "avail_max : %ld\n", status
.avail_max
);
434 snd_iprintf(buffer
, "-----\n");
435 snd_iprintf(buffer
, "hw_ptr : %ld\n", runtime
->status
->hw_ptr
);
436 snd_iprintf(buffer
, "appl_ptr : %ld\n", runtime
->control
->appl_ptr
);
439 #ifdef CONFIG_SND_PCM_XRUN_DEBUG
440 static void snd_pcm_xrun_debug_read(struct snd_info_entry
*entry
,
441 struct snd_info_buffer
*buffer
)
443 struct snd_pcm_str
*pstr
= entry
->private_data
;
444 snd_iprintf(buffer
, "%d\n", pstr
->xrun_debug
);
447 static void snd_pcm_xrun_debug_write(struct snd_info_entry
*entry
,
448 struct snd_info_buffer
*buffer
)
450 struct snd_pcm_str
*pstr
= entry
->private_data
;
452 if (!snd_info_get_line(buffer
, line
, sizeof(line
)))
453 pstr
->xrun_debug
= simple_strtoul(line
, NULL
, 10);
457 static int snd_pcm_stream_proc_init(struct snd_pcm_str
*pstr
)
459 struct snd_pcm
*pcm
= pstr
->pcm
;
460 struct snd_info_entry
*entry
;
463 sprintf(name
, "pcm%i%c", pcm
->device
,
464 pstr
->stream
== SNDRV_PCM_STREAM_PLAYBACK
? 'p' : 'c');
465 if ((entry
= snd_info_create_card_entry(pcm
->card
, name
, pcm
->card
->proc_root
)) == NULL
)
467 entry
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
468 if (snd_info_register(entry
) < 0) {
469 snd_info_free_entry(entry
);
472 pstr
->proc_root
= entry
;
474 if ((entry
= snd_info_create_card_entry(pcm
->card
, "info", pstr
->proc_root
)) != NULL
) {
475 snd_info_set_text_ops(entry
, pstr
, 256, snd_pcm_stream_proc_info_read
);
476 if (snd_info_register(entry
) < 0) {
477 snd_info_free_entry(entry
);
481 pstr
->proc_info_entry
= entry
;
483 #ifdef CONFIG_SND_PCM_XRUN_DEBUG
484 if ((entry
= snd_info_create_card_entry(pcm
->card
, "xrun_debug",
485 pstr
->proc_root
)) != NULL
) {
486 entry
->c
.text
.read_size
= 64;
487 entry
->c
.text
.read
= snd_pcm_xrun_debug_read
;
488 entry
->c
.text
.write_size
= 64;
489 entry
->c
.text
.write
= snd_pcm_xrun_debug_write
;
490 entry
->mode
|= S_IWUSR
;
491 entry
->private_data
= pstr
;
492 if (snd_info_register(entry
) < 0) {
493 snd_info_free_entry(entry
);
497 pstr
->proc_xrun_debug_entry
= entry
;
502 static int snd_pcm_stream_proc_done(struct snd_pcm_str
*pstr
)
504 #ifdef CONFIG_SND_PCM_XRUN_DEBUG
505 if (pstr
->proc_xrun_debug_entry
) {
506 snd_info_unregister(pstr
->proc_xrun_debug_entry
);
507 pstr
->proc_xrun_debug_entry
= NULL
;
510 if (pstr
->proc_info_entry
) {
511 snd_info_unregister(pstr
->proc_info_entry
);
512 pstr
->proc_info_entry
= NULL
;
514 if (pstr
->proc_root
) {
515 snd_info_unregister(pstr
->proc_root
);
516 pstr
->proc_root
= NULL
;
521 static int snd_pcm_substream_proc_init(struct snd_pcm_substream
*substream
)
523 struct snd_info_entry
*entry
;
524 struct snd_card
*card
;
527 card
= substream
->pcm
->card
;
529 sprintf(name
, "sub%i", substream
->number
);
530 if ((entry
= snd_info_create_card_entry(card
, name
, substream
->pstr
->proc_root
)) == NULL
)
532 entry
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
533 if (snd_info_register(entry
) < 0) {
534 snd_info_free_entry(entry
);
537 substream
->proc_root
= entry
;
539 if ((entry
= snd_info_create_card_entry(card
, "info", substream
->proc_root
)) != NULL
) {
540 snd_info_set_text_ops(entry
, substream
, 256, snd_pcm_substream_proc_info_read
);
541 if (snd_info_register(entry
) < 0) {
542 snd_info_free_entry(entry
);
546 substream
->proc_info_entry
= entry
;
548 if ((entry
= snd_info_create_card_entry(card
, "hw_params", substream
->proc_root
)) != NULL
) {
549 snd_info_set_text_ops(entry
, substream
, 256, snd_pcm_substream_proc_hw_params_read
);
550 if (snd_info_register(entry
) < 0) {
551 snd_info_free_entry(entry
);
555 substream
->proc_hw_params_entry
= entry
;
557 if ((entry
= snd_info_create_card_entry(card
, "sw_params", substream
->proc_root
)) != NULL
) {
558 snd_info_set_text_ops(entry
, substream
, 256, snd_pcm_substream_proc_sw_params_read
);
559 if (snd_info_register(entry
) < 0) {
560 snd_info_free_entry(entry
);
564 substream
->proc_sw_params_entry
= entry
;
566 if ((entry
= snd_info_create_card_entry(card
, "status", substream
->proc_root
)) != NULL
) {
567 snd_info_set_text_ops(entry
, substream
, 256, snd_pcm_substream_proc_status_read
);
568 if (snd_info_register(entry
) < 0) {
569 snd_info_free_entry(entry
);
573 substream
->proc_status_entry
= entry
;
578 static int snd_pcm_substream_proc_done(struct snd_pcm_substream
*substream
)
580 if (substream
->proc_info_entry
) {
581 snd_info_unregister(substream
->proc_info_entry
);
582 substream
->proc_info_entry
= NULL
;
584 if (substream
->proc_hw_params_entry
) {
585 snd_info_unregister(substream
->proc_hw_params_entry
);
586 substream
->proc_hw_params_entry
= NULL
;
588 if (substream
->proc_sw_params_entry
) {
589 snd_info_unregister(substream
->proc_sw_params_entry
);
590 substream
->proc_sw_params_entry
= NULL
;
592 if (substream
->proc_status_entry
) {
593 snd_info_unregister(substream
->proc_status_entry
);
594 substream
->proc_status_entry
= NULL
;
596 if (substream
->proc_root
) {
597 snd_info_unregister(substream
->proc_root
);
598 substream
->proc_root
= NULL
;
602 #else /* !CONFIG_SND_VERBOSE_PROCFS */
603 static inline int snd_pcm_stream_proc_init(struct snd_pcm_str
*pstr
) { return 0; }
604 static inline int snd_pcm_stream_proc_done(struct snd_pcm_str
*pstr
) { return 0; }
605 static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream
*substream
) { return 0; }
606 static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream
*substream
) { return 0; }
607 #endif /* CONFIG_SND_VERBOSE_PROCFS */
610 * snd_pcm_new_stream - create a new PCM stream
611 * @pcm: the pcm instance
612 * @stream: the stream direction, SNDRV_PCM_STREAM_XXX
613 * @substream_count: the number of substreams
615 * Creates a new stream for the pcm.
616 * The corresponding stream on the pcm must have been empty before
617 * calling this, i.e. zero must be given to the argument of
620 * Returns zero if successful, or a negative error code on failure.
622 int snd_pcm_new_stream(struct snd_pcm
*pcm
, int stream
, int substream_count
)
625 struct snd_pcm_str
*pstr
= &pcm
->streams
[stream
];
626 struct snd_pcm_substream
*substream
, *prev
;
628 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
629 mutex_init(&pstr
->oss
.setup_mutex
);
631 pstr
->stream
= stream
;
633 pstr
->substream_count
= substream_count
;
634 if (substream_count
> 0) {
635 err
= snd_pcm_stream_proc_init(pstr
);
637 snd_printk(KERN_ERR
"Error in snd_pcm_stream_proc_init\n");
642 for (idx
= 0, prev
= NULL
; idx
< substream_count
; idx
++) {
643 substream
= kzalloc(sizeof(*substream
), GFP_KERNEL
);
644 if (substream
== NULL
) {
645 snd_printk(KERN_ERR
"Cannot allocate PCM substream\n");
648 substream
->pcm
= pcm
;
649 substream
->pstr
= pstr
;
650 substream
->number
= idx
;
651 substream
->stream
= stream
;
652 sprintf(substream
->name
, "subdevice #%i", idx
);
653 substream
->buffer_bytes_max
= UINT_MAX
;
655 pstr
->substream
= substream
;
657 prev
->next
= substream
;
658 err
= snd_pcm_substream_proc_init(substream
);
660 snd_printk(KERN_ERR
"Error in snd_pcm_stream_proc_init\n");
664 substream
->group
= &substream
->self_group
;
665 spin_lock_init(&substream
->self_group
.lock
);
666 INIT_LIST_HEAD(&substream
->self_group
.substreams
);
667 list_add_tail(&substream
->link_list
, &substream
->self_group
.substreams
);
668 spin_lock_init(&substream
->timer_lock
);
674 EXPORT_SYMBOL(snd_pcm_new_stream
);
677 * snd_pcm_new - create a new PCM instance
678 * @card: the card instance
680 * @device: the device index (zero based)
681 * @playback_count: the number of substreams for playback
682 * @capture_count: the number of substreams for capture
683 * @rpcm: the pointer to store the new pcm instance
685 * Creates a new PCM instance.
687 * The pcm operators have to be set afterwards to the new instance
688 * via snd_pcm_set_ops().
690 * Returns zero if successful, or a negative error code on failure.
692 int snd_pcm_new(struct snd_card
*card
, char *id
, int device
,
693 int playback_count
, int capture_count
,
694 struct snd_pcm
** rpcm
)
698 static struct snd_device_ops ops
= {
699 .dev_free
= snd_pcm_dev_free
,
700 .dev_register
= snd_pcm_dev_register
,
701 .dev_disconnect
= snd_pcm_dev_disconnect
,
702 .dev_unregister
= snd_pcm_dev_unregister
705 snd_assert(rpcm
!= NULL
, return -EINVAL
);
707 snd_assert(card
!= NULL
, return -ENXIO
);
708 pcm
= kzalloc(sizeof(*pcm
), GFP_KERNEL
);
710 snd_printk(KERN_ERR
"Cannot allocate PCM\n");
714 pcm
->device
= device
;
716 strlcpy(pcm
->id
, id
, sizeof(pcm
->id
));
717 if ((err
= snd_pcm_new_stream(pcm
, SNDRV_PCM_STREAM_PLAYBACK
, playback_count
)) < 0) {
721 if ((err
= snd_pcm_new_stream(pcm
, SNDRV_PCM_STREAM_CAPTURE
, capture_count
)) < 0) {
725 mutex_init(&pcm
->open_mutex
);
726 init_waitqueue_head(&pcm
->open_wait
);
727 if ((err
= snd_device_new(card
, SNDRV_DEV_PCM
, pcm
, &ops
)) < 0) {
735 EXPORT_SYMBOL(snd_pcm_new
);
737 static void snd_pcm_free_stream(struct snd_pcm_str
* pstr
)
739 struct snd_pcm_substream
*substream
, *substream_next
;
740 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
741 struct snd_pcm_oss_setup
*setup
, *setupn
;
743 substream
= pstr
->substream
;
745 substream_next
= substream
->next
;
746 snd_pcm_substream_proc_done(substream
);
748 substream
= substream_next
;
750 snd_pcm_stream_proc_done(pstr
);
751 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
752 for (setup
= pstr
->oss
.setup_list
; setup
; setup
= setupn
) {
753 setupn
= setup
->next
;
754 kfree(setup
->task_name
);
760 static int snd_pcm_free(struct snd_pcm
*pcm
)
762 snd_assert(pcm
!= NULL
, return -ENXIO
);
763 if (pcm
->private_free
)
764 pcm
->private_free(pcm
);
765 snd_pcm_lib_preallocate_free_for_all(pcm
);
766 snd_pcm_free_stream(&pcm
->streams
[SNDRV_PCM_STREAM_PLAYBACK
]);
767 snd_pcm_free_stream(&pcm
->streams
[SNDRV_PCM_STREAM_CAPTURE
]);
772 static int snd_pcm_dev_free(struct snd_device
*device
)
774 struct snd_pcm
*pcm
= device
->device_data
;
775 return snd_pcm_free(pcm
);
778 static void snd_pcm_tick_timer_func(unsigned long data
)
780 struct snd_pcm_substream
*substream
= (struct snd_pcm_substream
*) data
;
781 snd_pcm_tick_elapsed(substream
);
784 int snd_pcm_attach_substream(struct snd_pcm
*pcm
, int stream
,
786 struct snd_pcm_substream
**rsubstream
)
788 struct snd_pcm_str
* pstr
;
789 struct snd_pcm_substream
*substream
;
790 struct snd_pcm_runtime
*runtime
;
791 struct snd_ctl_file
*kctl
;
792 struct snd_card
*card
;
793 struct list_head
*list
;
794 int prefer_subdevice
= -1;
797 snd_assert(rsubstream
!= NULL
, return -EINVAL
);
799 snd_assert(pcm
!= NULL
, return -ENXIO
);
800 pstr
= &pcm
->streams
[stream
];
801 if (pstr
->substream
== NULL
|| pstr
->substream_count
== 0)
805 down_read(&card
->controls_rwsem
);
806 list_for_each(list
, &card
->ctl_files
) {
807 kctl
= snd_ctl_file(list
);
808 if (kctl
->pid
== current
->pid
) {
809 prefer_subdevice
= kctl
->prefer_pcm_subdevice
;
813 up_read(&card
->controls_rwsem
);
816 case SNDRV_PCM_STREAM_PLAYBACK
:
817 if (pcm
->info_flags
& SNDRV_PCM_INFO_HALF_DUPLEX
) {
818 for (substream
= pcm
->streams
[SNDRV_PCM_STREAM_CAPTURE
].substream
; substream
; substream
= substream
->next
) {
819 if (SUBSTREAM_BUSY(substream
))
824 case SNDRV_PCM_STREAM_CAPTURE
:
825 if (pcm
->info_flags
& SNDRV_PCM_INFO_HALF_DUPLEX
) {
826 for (substream
= pcm
->streams
[SNDRV_PCM_STREAM_PLAYBACK
].substream
; substream
; substream
= substream
->next
) {
827 if (SUBSTREAM_BUSY(substream
))
836 if (prefer_subdevice
>= 0) {
837 for (substream
= pstr
->substream
; substream
; substream
= substream
->next
)
838 if (!SUBSTREAM_BUSY(substream
) && substream
->number
== prefer_subdevice
)
841 for (substream
= pstr
->substream
; substream
; substream
= substream
->next
)
842 if (!SUBSTREAM_BUSY(substream
))
845 if (substream
== NULL
)
848 runtime
= kzalloc(sizeof(*runtime
), GFP_KERNEL
);
852 size
= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
));
853 runtime
->status
= snd_malloc_pages(size
, GFP_KERNEL
);
854 if (runtime
->status
== NULL
) {
858 memset((void*)runtime
->status
, 0, size
);
860 size
= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
));
861 runtime
->control
= snd_malloc_pages(size
, GFP_KERNEL
);
862 if (runtime
->control
== NULL
) {
863 snd_free_pages((void*)runtime
->status
,
864 PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)));
868 memset((void*)runtime
->control
, 0, size
);
870 init_waitqueue_head(&runtime
->sleep
);
871 atomic_set(&runtime
->mmap_count
, 0);
872 init_timer(&runtime
->tick_timer
);
873 runtime
->tick_timer
.function
= snd_pcm_tick_timer_func
;
874 runtime
->tick_timer
.data
= (unsigned long) substream
;
876 runtime
->status
->state
= SNDRV_PCM_STATE_OPEN
;
878 substream
->runtime
= runtime
;
879 substream
->private_data
= pcm
->private_data
;
880 substream
->ffile
= file
;
881 pstr
->substream_opened
++;
882 *rsubstream
= substream
;
886 void snd_pcm_detach_substream(struct snd_pcm_substream
*substream
)
888 struct snd_pcm_runtime
*runtime
;
889 substream
->file
= NULL
;
890 runtime
= substream
->runtime
;
891 snd_assert(runtime
!= NULL
, return);
892 if (runtime
->private_free
!= NULL
)
893 runtime
->private_free(runtime
);
894 snd_free_pages((void*)runtime
->status
,
895 PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)));
896 snd_free_pages((void*)runtime
->control
,
897 PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
)));
898 kfree(runtime
->hw_constraints
.rules
);
900 substream
->runtime
= NULL
;
901 substream
->pstr
->substream_opened
--;
904 static int snd_pcm_dev_register(struct snd_device
*device
)
907 struct snd_pcm_substream
*substream
;
908 struct list_head
*list
;
910 struct snd_pcm
*pcm
= device
->device_data
;
912 snd_assert(pcm
!= NULL
&& device
!= NULL
, return -ENXIO
);
913 mutex_lock(®ister_mutex
);
914 if (snd_pcm_search(pcm
->card
, pcm
->device
)) {
915 mutex_unlock(®ister_mutex
);
918 list_add_tail(&pcm
->list
, &snd_pcm_devices
);
919 for (cidx
= 0; cidx
< 2; cidx
++) {
921 if (pcm
->streams
[cidx
].substream
== NULL
)
924 case SNDRV_PCM_STREAM_PLAYBACK
:
925 sprintf(str
, "pcmC%iD%ip", pcm
->card
->number
, pcm
->device
);
926 devtype
= SNDRV_DEVICE_TYPE_PCM_PLAYBACK
;
928 case SNDRV_PCM_STREAM_CAPTURE
:
929 sprintf(str
, "pcmC%iD%ic", pcm
->card
->number
, pcm
->device
);
930 devtype
= SNDRV_DEVICE_TYPE_PCM_CAPTURE
;
933 if ((err
= snd_register_device(devtype
, pcm
->card
,
935 &snd_pcm_f_ops
[cidx
],
938 list_del(&pcm
->list
);
939 mutex_unlock(®ister_mutex
);
942 for (substream
= pcm
->streams
[cidx
].substream
; substream
; substream
= substream
->next
)
943 snd_pcm_timer_init(substream
);
945 list_for_each(list
, &snd_pcm_notify_list
) {
946 struct snd_pcm_notify
*notify
;
947 notify
= list_entry(list
, struct snd_pcm_notify
, list
);
948 notify
->n_register(pcm
);
950 mutex_unlock(®ister_mutex
);
954 static int snd_pcm_dev_disconnect(struct snd_device
*device
)
956 struct snd_pcm
*pcm
= device
->device_data
;
957 struct list_head
*list
;
958 struct snd_pcm_substream
*substream
;
961 mutex_lock(®ister_mutex
);
962 list_del_init(&pcm
->list
);
963 for (cidx
= 0; cidx
< 2; cidx
++)
964 for (substream
= pcm
->streams
[cidx
].substream
; substream
; substream
= substream
->next
)
965 if (substream
->runtime
)
966 substream
->runtime
->status
->state
= SNDRV_PCM_STATE_DISCONNECTED
;
967 list_for_each(list
, &snd_pcm_notify_list
) {
968 struct snd_pcm_notify
*notify
;
969 notify
= list_entry(list
, struct snd_pcm_notify
, list
);
970 notify
->n_disconnect(pcm
);
972 mutex_unlock(®ister_mutex
);
976 static int snd_pcm_dev_unregister(struct snd_device
*device
)
979 struct snd_pcm_substream
*substream
;
980 struct list_head
*list
;
981 struct snd_pcm
*pcm
= device
->device_data
;
983 snd_assert(pcm
!= NULL
, return -ENXIO
);
984 mutex_lock(®ister_mutex
);
985 list_del(&pcm
->list
);
986 for (cidx
= 0; cidx
< 2; cidx
++) {
989 case SNDRV_PCM_STREAM_PLAYBACK
:
990 devtype
= SNDRV_DEVICE_TYPE_PCM_PLAYBACK
;
992 case SNDRV_PCM_STREAM_CAPTURE
:
993 devtype
= SNDRV_DEVICE_TYPE_PCM_CAPTURE
;
996 snd_unregister_device(devtype
, pcm
->card
, pcm
->device
);
997 for (substream
= pcm
->streams
[cidx
].substream
; substream
; substream
= substream
->next
)
998 snd_pcm_timer_done(substream
);
1000 list_for_each(list
, &snd_pcm_notify_list
) {
1001 struct snd_pcm_notify
*notify
;
1002 notify
= list_entry(list
, struct snd_pcm_notify
, list
);
1003 notify
->n_unregister(pcm
);
1005 mutex_unlock(®ister_mutex
);
1006 return snd_pcm_free(pcm
);
1009 int snd_pcm_notify(struct snd_pcm_notify
*notify
, int nfree
)
1011 struct list_head
*p
;
1013 snd_assert(notify
!= NULL
&& notify
->n_register
!= NULL
&& notify
->n_unregister
!= NULL
, return -EINVAL
);
1014 mutex_lock(®ister_mutex
);
1016 list_del(¬ify
->list
);
1017 list_for_each(p
, &snd_pcm_devices
)
1018 notify
->n_unregister(list_entry(p
,
1019 struct snd_pcm
, list
));
1021 list_add_tail(¬ify
->list
, &snd_pcm_notify_list
);
1022 list_for_each(p
, &snd_pcm_devices
)
1023 notify
->n_register(list_entry(p
, struct snd_pcm
, list
));
1025 mutex_unlock(®ister_mutex
);
1029 EXPORT_SYMBOL(snd_pcm_notify
);
1031 #ifdef CONFIG_PROC_FS
1036 static void snd_pcm_proc_read(struct snd_info_entry
*entry
,
1037 struct snd_info_buffer
*buffer
)
1039 struct list_head
*p
;
1040 struct snd_pcm
*pcm
;
1042 mutex_lock(®ister_mutex
);
1043 list_for_each(p
, &snd_pcm_devices
) {
1044 pcm
= list_entry(p
, struct snd_pcm
, list
);
1045 snd_iprintf(buffer
, "%02i-%02i: %s : %s",
1046 pcm
->card
->number
, pcm
->device
, pcm
->id
, pcm
->name
);
1047 if (pcm
->streams
[SNDRV_PCM_STREAM_PLAYBACK
].substream
)
1048 snd_iprintf(buffer
, " : playback %i",
1049 pcm
->streams
[SNDRV_PCM_STREAM_PLAYBACK
].substream_count
);
1050 if (pcm
->streams
[SNDRV_PCM_STREAM_CAPTURE
].substream
)
1051 snd_iprintf(buffer
, " : capture %i",
1052 pcm
->streams
[SNDRV_PCM_STREAM_CAPTURE
].substream_count
);
1053 snd_iprintf(buffer
, "\n");
1055 mutex_unlock(®ister_mutex
);
1058 static struct snd_info_entry
*snd_pcm_proc_entry
= NULL
;
1060 static void snd_pcm_proc_init(void)
1062 struct snd_info_entry
*entry
;
1064 if ((entry
= snd_info_create_module_entry(THIS_MODULE
, "pcm", NULL
)) != NULL
) {
1065 snd_info_set_text_ops(entry
, NULL
, SNDRV_CARDS
* SNDRV_PCM_DEVICES
* 128,
1067 if (snd_info_register(entry
) < 0) {
1068 snd_info_free_entry(entry
);
1072 snd_pcm_proc_entry
= entry
;
1075 static void snd_pcm_proc_done(void)
1077 if (snd_pcm_proc_entry
)
1078 snd_info_unregister(snd_pcm_proc_entry
);
1081 #else /* !CONFIG_PROC_FS */
1082 #define snd_pcm_proc_init()
1083 #define snd_pcm_proc_done()
1084 #endif /* CONFIG_PROC_FS */
1091 static int __init
alsa_pcm_init(void)
1093 snd_ctl_register_ioctl(snd_pcm_control_ioctl
);
1094 snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl
);
1095 snd_pcm_proc_init();
1099 static void __exit
alsa_pcm_exit(void)
1101 snd_ctl_unregister_ioctl(snd_pcm_control_ioctl
);
1102 snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl
);
1103 snd_pcm_proc_done();
1106 module_init(alsa_pcm_init
)
1107 module_exit(alsa_pcm_exit
)