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 <sound/core.h>
27 #include <sound/minors.h>
28 #include <sound/pcm.h>
29 #include <sound/control.h>
30 #include <sound/info.h>
32 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>");
33 MODULE_DESCRIPTION("Midlevel PCM code for ALSA.");
34 MODULE_LICENSE("GPL");
36 static LIST_HEAD(snd_pcm_devices
);
37 static LIST_HEAD(snd_pcm_notify_list
);
38 static DECLARE_MUTEX(register_mutex
);
40 static int snd_pcm_free(struct snd_pcm
*pcm
);
41 static int snd_pcm_dev_free(struct snd_device
*device
);
42 static int snd_pcm_dev_register(struct snd_device
*device
);
43 static int snd_pcm_dev_disconnect(struct snd_device
*device
);
44 static int snd_pcm_dev_unregister(struct snd_device
*device
);
46 static struct snd_pcm
*snd_pcm_search(struct snd_card
*card
, int device
)
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
)
59 static int snd_pcm_control_ioctl(struct snd_card
*card
,
60 struct snd_ctl_file
*control
,
61 unsigned int cmd
, unsigned long arg
)
64 case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE
:
68 if (get_user(device
, (int __user
*)arg
))
70 down(®ister_mutex
);
71 device
= device
< 0 ? 0 : device
+ 1;
72 while (device
< SNDRV_PCM_DEVICES
) {
73 if (snd_pcm_search(card
, device
))
77 if (device
== SNDRV_PCM_DEVICES
)
80 if (put_user(device
, (int __user
*)arg
))
84 case SNDRV_CTL_IOCTL_PCM_INFO
:
86 struct snd_pcm_info __user
*info
;
87 unsigned int device
, subdevice
;
90 struct snd_pcm_str
*pstr
;
91 struct snd_pcm_substream
*substream
;
94 info
= (struct snd_pcm_info __user
*)arg
;
95 if (get_user(device
, &info
->device
))
97 if (get_user(stream
, &info
->stream
))
99 if (stream
< 0 || stream
> 1)
101 if (get_user(subdevice
, &info
->subdevice
))
103 down(®ister_mutex
);
104 pcm
= snd_pcm_search(card
, device
);
109 pstr
= &pcm
->streams
[stream
];
110 if (pstr
->substream_count
== 0) {
114 if (subdevice
>= pstr
->substream_count
) {
118 for (substream
= pstr
->substream
; substream
;
119 substream
= substream
->next
)
120 if (substream
->number
== (int)subdevice
)
122 if (substream
== NULL
) {
126 err
= snd_pcm_info_user(substream
, info
);
131 case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE
:
135 if (get_user(val
, (int __user
*)arg
))
137 control
->prefer_pcm_subdevice
= val
;
143 #define STATE(v) [SNDRV_PCM_STATE_##v] = #v
144 #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v
145 #define READY(v) [SNDRV_PCM_READY_##v] = #v
146 #define XRUN(v) [SNDRV_PCM_XRUN_##v] = #v
147 #define SILENCE(v) [SNDRV_PCM_SILENCE_##v] = #v
148 #define TSTAMP(v) [SNDRV_PCM_TSTAMP_##v] = #v
149 #define ACCESS(v) [SNDRV_PCM_ACCESS_##v] = #v
150 #define START(v) [SNDRV_PCM_START_##v] = #v
151 #define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v
152 #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v
154 static char *snd_pcm_stream_names
[] = {
159 static char *snd_pcm_state_names
[] = {
170 static char *snd_pcm_access_names
[] = {
171 ACCESS(MMAP_INTERLEAVED
),
172 ACCESS(MMAP_NONINTERLEAVED
),
173 ACCESS(MMAP_COMPLEX
),
174 ACCESS(RW_INTERLEAVED
),
175 ACCESS(RW_NONINTERLEAVED
),
178 static char *snd_pcm_format_names
[] = {
197 FORMAT(IEC958_SUBFRAME_LE
),
198 FORMAT(IEC958_SUBFRAME_BE
),
219 static char *snd_pcm_subformat_names
[] = {
223 static char *snd_pcm_tstamp_mode_names
[] = {
228 static const char *snd_pcm_stream_name(int stream
)
230 snd_assert(stream
<= SNDRV_PCM_STREAM_LAST
, return NULL
);
231 return snd_pcm_stream_names
[stream
];
234 static const char *snd_pcm_access_name(snd_pcm_access_t access
)
236 return snd_pcm_access_names
[access
];
239 const char *snd_pcm_format_name(snd_pcm_format_t format
)
241 return snd_pcm_format_names
[format
];
244 static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat
)
246 return snd_pcm_subformat_names
[subformat
];
249 static const char *snd_pcm_tstamp_mode_name(int mode
)
251 snd_assert(mode
<= SNDRV_PCM_TSTAMP_LAST
, return NULL
);
252 return snd_pcm_tstamp_mode_names
[mode
];
255 static const char *snd_pcm_state_name(snd_pcm_state_t state
)
257 return snd_pcm_state_names
[state
];
260 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
261 #include <linux/soundcard.h>
262 static const char *snd_pcm_oss_format_name(int format
)
291 #ifdef CONFIG_PROC_FS
292 static void snd_pcm_proc_info_read(struct snd_pcm_substream
*substream
,
293 struct snd_info_buffer
*buffer
)
295 struct snd_pcm_info
*info
;
301 info
= kmalloc(sizeof(*info
), GFP_KERNEL
);
303 printk(KERN_DEBUG
"snd_pcm_proc_info_read: cannot malloc\n");
307 err
= snd_pcm_info(substream
, info
);
309 snd_iprintf(buffer
, "error %d\n", err
);
313 snd_iprintf(buffer
, "card: %d\n", info
->card
);
314 snd_iprintf(buffer
, "device: %d\n", info
->device
);
315 snd_iprintf(buffer
, "subdevice: %d\n", info
->subdevice
);
316 snd_iprintf(buffer
, "stream: %s\n", snd_pcm_stream_name(info
->stream
));
317 snd_iprintf(buffer
, "id: %s\n", info
->id
);
318 snd_iprintf(buffer
, "name: %s\n", info
->name
);
319 snd_iprintf(buffer
, "subname: %s\n", info
->subname
);
320 snd_iprintf(buffer
, "class: %d\n", info
->dev_class
);
321 snd_iprintf(buffer
, "subclass: %d\n", info
->dev_subclass
);
322 snd_iprintf(buffer
, "subdevices_count: %d\n", info
->subdevices_count
);
323 snd_iprintf(buffer
, "subdevices_avail: %d\n", info
->subdevices_avail
);
327 static void snd_pcm_stream_proc_info_read(struct snd_info_entry
*entry
,
328 struct snd_info_buffer
*buffer
)
330 snd_pcm_proc_info_read(((struct snd_pcm_str
*)entry
->private_data
)->substream
,
334 static void snd_pcm_substream_proc_info_read(struct snd_info_entry
*entry
,
335 struct snd_info_buffer
*buffer
)
337 snd_pcm_proc_info_read((struct snd_pcm_substream
*)entry
->private_data
,
341 static void snd_pcm_substream_proc_hw_params_read(struct snd_info_entry
*entry
,
342 struct snd_info_buffer
*buffer
)
344 struct snd_pcm_substream
*substream
= entry
->private_data
;
345 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
347 snd_iprintf(buffer
, "closed\n");
350 snd_pcm_stream_lock_irq(substream
);
351 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
352 snd_iprintf(buffer
, "no setup\n");
353 snd_pcm_stream_unlock_irq(substream
);
356 snd_iprintf(buffer
, "access: %s\n", snd_pcm_access_name(runtime
->access
));
357 snd_iprintf(buffer
, "format: %s\n", snd_pcm_format_name(runtime
->format
));
358 snd_iprintf(buffer
, "subformat: %s\n", snd_pcm_subformat_name(runtime
->subformat
));
359 snd_iprintf(buffer
, "channels: %u\n", runtime
->channels
);
360 snd_iprintf(buffer
, "rate: %u (%u/%u)\n", runtime
->rate
, runtime
->rate_num
, runtime
->rate_den
);
361 snd_iprintf(buffer
, "period_size: %lu\n", runtime
->period_size
);
362 snd_iprintf(buffer
, "buffer_size: %lu\n", runtime
->buffer_size
);
363 snd_iprintf(buffer
, "tick_time: %u\n", runtime
->tick_time
);
364 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
365 if (substream
->oss
.oss
) {
366 snd_iprintf(buffer
, "OSS format: %s\n", snd_pcm_oss_format_name(runtime
->oss
.format
));
367 snd_iprintf(buffer
, "OSS channels: %u\n", runtime
->oss
.channels
);
368 snd_iprintf(buffer
, "OSS rate: %u\n", runtime
->oss
.rate
);
369 snd_iprintf(buffer
, "OSS period bytes: %lu\n", (unsigned long)runtime
->oss
.period_bytes
);
370 snd_iprintf(buffer
, "OSS periods: %u\n", runtime
->oss
.periods
);
371 snd_iprintf(buffer
, "OSS period frames: %lu\n", (unsigned long)runtime
->oss
.period_frames
);
374 snd_pcm_stream_unlock_irq(substream
);
377 static void snd_pcm_substream_proc_sw_params_read(struct snd_info_entry
*entry
,
378 struct snd_info_buffer
*buffer
)
380 struct snd_pcm_substream
*substream
= entry
->private_data
;
381 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
383 snd_iprintf(buffer
, "closed\n");
386 snd_pcm_stream_lock_irq(substream
);
387 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
388 snd_iprintf(buffer
, "no setup\n");
389 snd_pcm_stream_unlock_irq(substream
);
392 snd_iprintf(buffer
, "tstamp_mode: %s\n", snd_pcm_tstamp_mode_name(runtime
->tstamp_mode
));
393 snd_iprintf(buffer
, "period_step: %u\n", runtime
->period_step
);
394 snd_iprintf(buffer
, "sleep_min: %u\n", runtime
->sleep_min
);
395 snd_iprintf(buffer
, "avail_min: %lu\n", runtime
->control
->avail_min
);
396 snd_iprintf(buffer
, "xfer_align: %lu\n", runtime
->xfer_align
);
397 snd_iprintf(buffer
, "start_threshold: %lu\n", runtime
->start_threshold
);
398 snd_iprintf(buffer
, "stop_threshold: %lu\n", runtime
->stop_threshold
);
399 snd_iprintf(buffer
, "silence_threshold: %lu\n", runtime
->silence_threshold
);
400 snd_iprintf(buffer
, "silence_size: %lu\n", runtime
->silence_size
);
401 snd_iprintf(buffer
, "boundary: %lu\n", runtime
->boundary
);
402 snd_pcm_stream_unlock_irq(substream
);
405 static void snd_pcm_substream_proc_status_read(struct snd_info_entry
*entry
,
406 struct snd_info_buffer
*buffer
)
408 struct snd_pcm_substream
*substream
= entry
->private_data
;
409 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
410 struct snd_pcm_status status
;
413 snd_iprintf(buffer
, "closed\n");
416 memset(&status
, 0, sizeof(status
));
417 err
= snd_pcm_status(substream
, &status
);
419 snd_iprintf(buffer
, "error %d\n", err
);
422 snd_iprintf(buffer
, "state: %s\n", snd_pcm_state_name(status
.state
));
423 snd_iprintf(buffer
, "trigger_time: %ld.%09ld\n",
424 status
.trigger_tstamp
.tv_sec
, status
.trigger_tstamp
.tv_nsec
);
425 snd_iprintf(buffer
, "tstamp : %ld.%09ld\n",
426 status
.tstamp
.tv_sec
, status
.tstamp
.tv_nsec
);
427 snd_iprintf(buffer
, "delay : %ld\n", status
.delay
);
428 snd_iprintf(buffer
, "avail : %ld\n", status
.avail
);
429 snd_iprintf(buffer
, "avail_max : %ld\n", status
.avail_max
);
430 snd_iprintf(buffer
, "-----\n");
431 snd_iprintf(buffer
, "hw_ptr : %ld\n", runtime
->status
->hw_ptr
);
432 snd_iprintf(buffer
, "appl_ptr : %ld\n", runtime
->control
->appl_ptr
);
436 #ifdef CONFIG_SND_DEBUG
437 static void snd_pcm_xrun_debug_read(struct snd_info_entry
*entry
,
438 struct snd_info_buffer
*buffer
)
440 struct snd_pcm_str
*pstr
= entry
->private_data
;
441 snd_iprintf(buffer
, "%d\n", pstr
->xrun_debug
);
444 static void snd_pcm_xrun_debug_write(struct snd_info_entry
*entry
,
445 struct snd_info_buffer
*buffer
)
447 struct snd_pcm_str
*pstr
= entry
->private_data
;
449 if (!snd_info_get_line(buffer
, line
, sizeof(line
)))
450 pstr
->xrun_debug
= simple_strtoul(line
, NULL
, 10);
454 static int snd_pcm_stream_proc_init(struct snd_pcm_str
*pstr
)
456 struct snd_pcm
*pcm
= pstr
->pcm
;
457 struct snd_info_entry
*entry
;
460 sprintf(name
, "pcm%i%c", pcm
->device
,
461 pstr
->stream
== SNDRV_PCM_STREAM_PLAYBACK
? 'p' : 'c');
462 if ((entry
= snd_info_create_card_entry(pcm
->card
, name
, pcm
->card
->proc_root
)) == NULL
)
464 entry
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
465 if (snd_info_register(entry
) < 0) {
466 snd_info_free_entry(entry
);
469 pstr
->proc_root
= entry
;
471 if ((entry
= snd_info_create_card_entry(pcm
->card
, "info", pstr
->proc_root
)) != NULL
) {
472 snd_info_set_text_ops(entry
, pstr
, 256, snd_pcm_stream_proc_info_read
);
473 if (snd_info_register(entry
) < 0) {
474 snd_info_free_entry(entry
);
478 pstr
->proc_info_entry
= entry
;
480 #ifdef CONFIG_SND_DEBUG
481 if ((entry
= snd_info_create_card_entry(pcm
->card
, "xrun_debug",
482 pstr
->proc_root
)) != NULL
) {
483 entry
->c
.text
.read_size
= 64;
484 entry
->c
.text
.read
= snd_pcm_xrun_debug_read
;
485 entry
->c
.text
.write_size
= 64;
486 entry
->c
.text
.write
= snd_pcm_xrun_debug_write
;
487 entry
->mode
|= S_IWUSR
;
488 entry
->private_data
= pstr
;
489 if (snd_info_register(entry
) < 0) {
490 snd_info_free_entry(entry
);
494 pstr
->proc_xrun_debug_entry
= entry
;
499 static int snd_pcm_stream_proc_done(struct snd_pcm_str
*pstr
)
501 #ifdef CONFIG_SND_DEBUG
502 if (pstr
->proc_xrun_debug_entry
) {
503 snd_info_unregister(pstr
->proc_xrun_debug_entry
);
504 pstr
->proc_xrun_debug_entry
= NULL
;
507 if (pstr
->proc_info_entry
) {
508 snd_info_unregister(pstr
->proc_info_entry
);
509 pstr
->proc_info_entry
= NULL
;
511 if (pstr
->proc_root
) {
512 snd_info_unregister(pstr
->proc_root
);
513 pstr
->proc_root
= NULL
;
518 static int snd_pcm_substream_proc_init(struct snd_pcm_substream
*substream
)
520 struct snd_info_entry
*entry
;
521 struct snd_card
*card
;
524 card
= substream
->pcm
->card
;
526 sprintf(name
, "sub%i", substream
->number
);
527 if ((entry
= snd_info_create_card_entry(card
, name
, substream
->pstr
->proc_root
)) == NULL
)
529 entry
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
530 if (snd_info_register(entry
) < 0) {
531 snd_info_free_entry(entry
);
534 substream
->proc_root
= entry
;
536 if ((entry
= snd_info_create_card_entry(card
, "info", substream
->proc_root
)) != NULL
) {
537 snd_info_set_text_ops(entry
, substream
, 256, snd_pcm_substream_proc_info_read
);
538 if (snd_info_register(entry
) < 0) {
539 snd_info_free_entry(entry
);
543 substream
->proc_info_entry
= entry
;
545 if ((entry
= snd_info_create_card_entry(card
, "hw_params", substream
->proc_root
)) != NULL
) {
546 snd_info_set_text_ops(entry
, substream
, 256, snd_pcm_substream_proc_hw_params_read
);
547 if (snd_info_register(entry
) < 0) {
548 snd_info_free_entry(entry
);
552 substream
->proc_hw_params_entry
= entry
;
554 if ((entry
= snd_info_create_card_entry(card
, "sw_params", substream
->proc_root
)) != NULL
) {
555 snd_info_set_text_ops(entry
, substream
, 256, snd_pcm_substream_proc_sw_params_read
);
556 if (snd_info_register(entry
) < 0) {
557 snd_info_free_entry(entry
);
561 substream
->proc_sw_params_entry
= entry
;
563 if ((entry
= snd_info_create_card_entry(card
, "status", substream
->proc_root
)) != NULL
) {
564 snd_info_set_text_ops(entry
, substream
, 256, snd_pcm_substream_proc_status_read
);
565 if (snd_info_register(entry
) < 0) {
566 snd_info_free_entry(entry
);
570 substream
->proc_status_entry
= entry
;
575 static int snd_pcm_substream_proc_done(struct snd_pcm_substream
*substream
)
577 if (substream
->proc_info_entry
) {
578 snd_info_unregister(substream
->proc_info_entry
);
579 substream
->proc_info_entry
= NULL
;
581 if (substream
->proc_hw_params_entry
) {
582 snd_info_unregister(substream
->proc_hw_params_entry
);
583 substream
->proc_hw_params_entry
= NULL
;
585 if (substream
->proc_sw_params_entry
) {
586 snd_info_unregister(substream
->proc_sw_params_entry
);
587 substream
->proc_sw_params_entry
= NULL
;
589 if (substream
->proc_status_entry
) {
590 snd_info_unregister(substream
->proc_status_entry
);
591 substream
->proc_status_entry
= NULL
;
593 if (substream
->proc_root
) {
594 snd_info_unregister(substream
->proc_root
);
595 substream
->proc_root
= NULL
;
601 * snd_pcm_new_stream - create a new PCM stream
602 * @pcm: the pcm instance
603 * @stream: the stream direction, SNDRV_PCM_STREAM_XXX
604 * @substream_count: the number of substreams
606 * Creates a new stream for the pcm.
607 * The corresponding stream on the pcm must have been empty before
608 * calling this, i.e. zero must be given to the argument of
611 * Returns zero if successful, or a negative error code on failure.
613 int snd_pcm_new_stream(struct snd_pcm
*pcm
, int stream
, int substream_count
)
616 struct snd_pcm_str
*pstr
= &pcm
->streams
[stream
];
617 struct snd_pcm_substream
*substream
, *prev
;
619 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
620 init_MUTEX(&pstr
->oss
.setup_mutex
);
622 pstr
->stream
= stream
;
624 pstr
->substream_count
= substream_count
;
625 if (substream_count
> 0) {
626 err
= snd_pcm_stream_proc_init(pstr
);
628 snd_printk(KERN_ERR
"Error in snd_pcm_stream_proc_init\n");
633 for (idx
= 0, prev
= NULL
; idx
< substream_count
; idx
++) {
634 substream
= kzalloc(sizeof(*substream
), GFP_KERNEL
);
635 if (substream
== NULL
) {
636 snd_printk(KERN_ERR
"Cannot allocate PCM substream\n");
639 substream
->pcm
= pcm
;
640 substream
->pstr
= pstr
;
641 substream
->number
= idx
;
642 substream
->stream
= stream
;
643 sprintf(substream
->name
, "subdevice #%i", idx
);
644 substream
->buffer_bytes_max
= UINT_MAX
;
646 pstr
->substream
= substream
;
648 prev
->next
= substream
;
649 err
= snd_pcm_substream_proc_init(substream
);
651 snd_printk(KERN_ERR
"Error in snd_pcm_stream_proc_init\n");
655 substream
->group
= &substream
->self_group
;
656 spin_lock_init(&substream
->self_group
.lock
);
657 INIT_LIST_HEAD(&substream
->self_group
.substreams
);
658 list_add_tail(&substream
->link_list
, &substream
->self_group
.substreams
);
659 spin_lock_init(&substream
->timer_lock
);
666 * snd_pcm_new - create a new PCM instance
667 * @card: the card instance
669 * @device: the device index (zero based)
670 * @playback_count: the number of substreams for playback
671 * @capture_count: the number of substreams for capture
672 * @rpcm: the pointer to store the new pcm instance
674 * Creates a new PCM instance.
676 * The pcm operators have to be set afterwards to the new instance
677 * via snd_pcm_set_ops().
679 * Returns zero if successful, or a negative error code on failure.
681 int snd_pcm_new(struct snd_card
*card
, char *id
, int device
,
682 int playback_count
, int capture_count
,
683 struct snd_pcm
** rpcm
)
687 static struct snd_device_ops ops
= {
688 .dev_free
= snd_pcm_dev_free
,
689 .dev_register
= snd_pcm_dev_register
,
690 .dev_disconnect
= snd_pcm_dev_disconnect
,
691 .dev_unregister
= snd_pcm_dev_unregister
694 snd_assert(rpcm
!= NULL
, return -EINVAL
);
696 snd_assert(card
!= NULL
, return -ENXIO
);
697 pcm
= kzalloc(sizeof(*pcm
), GFP_KERNEL
);
699 snd_printk(KERN_ERR
"Cannot allocate PCM\n");
703 pcm
->device
= device
;
705 strlcpy(pcm
->id
, id
, sizeof(pcm
->id
));
706 if ((err
= snd_pcm_new_stream(pcm
, SNDRV_PCM_STREAM_PLAYBACK
, playback_count
)) < 0) {
710 if ((err
= snd_pcm_new_stream(pcm
, SNDRV_PCM_STREAM_CAPTURE
, capture_count
)) < 0) {
714 init_MUTEX(&pcm
->open_mutex
);
715 init_waitqueue_head(&pcm
->open_wait
);
716 if ((err
= snd_device_new(card
, SNDRV_DEV_PCM
, pcm
, &ops
)) < 0) {
724 static void snd_pcm_free_stream(struct snd_pcm_str
* pstr
)
726 struct snd_pcm_substream
*substream
, *substream_next
;
727 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
728 struct snd_pcm_oss_setup
*setup
, *setupn
;
730 substream
= pstr
->substream
;
732 substream_next
= substream
->next
;
733 snd_pcm_substream_proc_done(substream
);
735 substream
= substream_next
;
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
);
747 static int snd_pcm_free(struct snd_pcm
*pcm
)
749 snd_assert(pcm
!= NULL
, return -ENXIO
);
750 if (pcm
->private_free
)
751 pcm
->private_free(pcm
);
752 snd_pcm_lib_preallocate_free_for_all(pcm
);
753 snd_pcm_free_stream(&pcm
->streams
[SNDRV_PCM_STREAM_PLAYBACK
]);
754 snd_pcm_free_stream(&pcm
->streams
[SNDRV_PCM_STREAM_CAPTURE
]);
759 static int snd_pcm_dev_free(struct snd_device
*device
)
761 struct snd_pcm
*pcm
= device
->device_data
;
762 return snd_pcm_free(pcm
);
765 static void snd_pcm_tick_timer_func(unsigned long data
)
767 struct snd_pcm_substream
*substream
= (struct snd_pcm_substream
*) data
;
768 snd_pcm_tick_elapsed(substream
);
771 int snd_pcm_open_substream(struct snd_pcm
*pcm
, int stream
,
772 struct snd_pcm_substream
**rsubstream
)
774 struct snd_pcm_str
* pstr
;
775 struct snd_pcm_substream
*substream
;
776 struct snd_pcm_runtime
*runtime
;
777 struct snd_ctl_file
*kctl
;
778 struct snd_card
*card
;
779 struct list_head
*list
;
780 int prefer_subdevice
= -1;
783 snd_assert(rsubstream
!= NULL
, return -EINVAL
);
785 snd_assert(pcm
!= NULL
, return -ENXIO
);
786 pstr
= &pcm
->streams
[stream
];
787 if (pstr
->substream
== NULL
)
791 down_read(&card
->controls_rwsem
);
792 list_for_each(list
, &card
->ctl_files
) {
793 kctl
= snd_ctl_file(list
);
794 if (kctl
->pid
== current
->pid
) {
795 prefer_subdevice
= kctl
->prefer_pcm_subdevice
;
799 up_read(&card
->controls_rwsem
);
801 if (pstr
->substream_count
== 0)
804 case SNDRV_PCM_STREAM_PLAYBACK
:
805 if (pcm
->info_flags
& SNDRV_PCM_INFO_HALF_DUPLEX
) {
806 for (substream
= pcm
->streams
[SNDRV_PCM_STREAM_CAPTURE
].substream
; substream
; substream
= substream
->next
) {
807 if (SUBSTREAM_BUSY(substream
))
812 case SNDRV_PCM_STREAM_CAPTURE
:
813 if (pcm
->info_flags
& SNDRV_PCM_INFO_HALF_DUPLEX
) {
814 for (substream
= pcm
->streams
[SNDRV_PCM_STREAM_PLAYBACK
].substream
; substream
; substream
= substream
->next
) {
815 if (SUBSTREAM_BUSY(substream
))
824 if (prefer_subdevice
>= 0) {
825 for (substream
= pstr
->substream
; substream
; substream
= substream
->next
)
826 if (!SUBSTREAM_BUSY(substream
) && substream
->number
== prefer_subdevice
)
829 for (substream
= pstr
->substream
; substream
; substream
= substream
->next
)
830 if (!SUBSTREAM_BUSY(substream
))
833 if (substream
== NULL
)
836 runtime
= kzalloc(sizeof(*runtime
), GFP_KERNEL
);
840 size
= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
));
841 runtime
->status
= snd_malloc_pages(size
, GFP_KERNEL
);
842 if (runtime
->status
== NULL
) {
846 memset((void*)runtime
->status
, 0, size
);
848 size
= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
));
849 runtime
->control
= snd_malloc_pages(size
, GFP_KERNEL
);
850 if (runtime
->control
== NULL
) {
851 snd_free_pages((void*)runtime
->status
,
852 PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)));
856 memset((void*)runtime
->control
, 0, size
);
858 init_waitqueue_head(&runtime
->sleep
);
859 atomic_set(&runtime
->mmap_count
, 0);
860 init_timer(&runtime
->tick_timer
);
861 runtime
->tick_timer
.function
= snd_pcm_tick_timer_func
;
862 runtime
->tick_timer
.data
= (unsigned long) substream
;
864 runtime
->status
->state
= SNDRV_PCM_STATE_OPEN
;
866 substream
->runtime
= runtime
;
867 substream
->private_data
= pcm
->private_data
;
868 pstr
->substream_opened
++;
869 *rsubstream
= substream
;
873 void snd_pcm_release_substream(struct snd_pcm_substream
*substream
)
875 struct snd_pcm_runtime
*runtime
;
876 substream
->file
= NULL
;
877 runtime
= substream
->runtime
;
878 snd_assert(runtime
!= NULL
, return);
879 if (runtime
->private_free
!= NULL
)
880 runtime
->private_free(runtime
);
881 snd_free_pages((void*)runtime
->status
,
882 PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)));
883 snd_free_pages((void*)runtime
->control
,
884 PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
)));
885 kfree(runtime
->hw_constraints
.rules
);
887 substream
->runtime
= NULL
;
888 substream
->pstr
->substream_opened
--;
891 static int snd_pcm_dev_register(struct snd_device
*device
)
894 struct snd_pcm_substream
*substream
;
895 struct list_head
*list
;
897 struct snd_pcm
*pcm
= device
->device_data
;
899 snd_assert(pcm
!= NULL
&& device
!= NULL
, return -ENXIO
);
900 down(®ister_mutex
);
901 if (snd_pcm_search(pcm
->card
, pcm
->device
)) {
905 list_add_tail(&pcm
->list
, &snd_pcm_devices
);
906 for (cidx
= 0; cidx
< 2; cidx
++) {
908 if (pcm
->streams
[cidx
].substream
== NULL
)
911 case SNDRV_PCM_STREAM_PLAYBACK
:
912 sprintf(str
, "pcmC%iD%ip", pcm
->card
->number
, pcm
->device
);
913 devtype
= SNDRV_DEVICE_TYPE_PCM_PLAYBACK
;
915 case SNDRV_PCM_STREAM_CAPTURE
:
916 sprintf(str
, "pcmC%iD%ic", pcm
->card
->number
, pcm
->device
);
917 devtype
= SNDRV_DEVICE_TYPE_PCM_CAPTURE
;
920 if ((err
= snd_register_device(devtype
, pcm
->card
,
922 &snd_pcm_f_ops
[cidx
],
925 list_del(&pcm
->list
);
929 for (substream
= pcm
->streams
[cidx
].substream
; substream
; substream
= substream
->next
)
930 snd_pcm_timer_init(substream
);
932 list_for_each(list
, &snd_pcm_notify_list
) {
933 struct snd_pcm_notify
*notify
;
934 notify
= list_entry(list
, struct snd_pcm_notify
, list
);
935 notify
->n_register(pcm
);
941 static int snd_pcm_dev_disconnect(struct snd_device
*device
)
943 struct snd_pcm
*pcm
= device
->device_data
;
944 struct list_head
*list
;
945 struct snd_pcm_substream
*substream
;
948 down(®ister_mutex
);
949 list_del_init(&pcm
->list
);
950 for (cidx
= 0; cidx
< 2; cidx
++)
951 for (substream
= pcm
->streams
[cidx
].substream
; substream
; substream
= substream
->next
)
952 if (substream
->runtime
)
953 substream
->runtime
->status
->state
= SNDRV_PCM_STATE_DISCONNECTED
;
954 list_for_each(list
, &snd_pcm_notify_list
) {
955 struct snd_pcm_notify
*notify
;
956 notify
= list_entry(list
, struct snd_pcm_notify
, list
);
957 notify
->n_disconnect(pcm
);
963 static int snd_pcm_dev_unregister(struct snd_device
*device
)
966 struct snd_pcm_substream
*substream
;
967 struct list_head
*list
;
968 struct snd_pcm
*pcm
= device
->device_data
;
970 snd_assert(pcm
!= NULL
, return -ENXIO
);
971 down(®ister_mutex
);
972 list_del(&pcm
->list
);
973 for (cidx
= 0; cidx
< 2; cidx
++) {
976 case SNDRV_PCM_STREAM_PLAYBACK
:
977 devtype
= SNDRV_DEVICE_TYPE_PCM_PLAYBACK
;
979 case SNDRV_PCM_STREAM_CAPTURE
:
980 devtype
= SNDRV_DEVICE_TYPE_PCM_CAPTURE
;
983 snd_unregister_device(devtype
, pcm
->card
, pcm
->device
);
984 for (substream
= pcm
->streams
[cidx
].substream
; substream
; substream
= substream
->next
)
985 snd_pcm_timer_done(substream
);
987 list_for_each(list
, &snd_pcm_notify_list
) {
988 struct snd_pcm_notify
*notify
;
989 notify
= list_entry(list
, struct snd_pcm_notify
, list
);
990 notify
->n_unregister(pcm
);
993 return snd_pcm_free(pcm
);
996 int snd_pcm_notify(struct snd_pcm_notify
*notify
, int nfree
)
1000 snd_assert(notify
!= NULL
&& notify
->n_register
!= NULL
&& notify
->n_unregister
!= NULL
, return -EINVAL
);
1001 down(®ister_mutex
);
1003 list_del(¬ify
->list
);
1004 list_for_each(p
, &snd_pcm_devices
)
1005 notify
->n_unregister(list_entry(p
,
1006 struct snd_pcm
, list
));
1008 list_add_tail(¬ify
->list
, &snd_pcm_notify_list
);
1009 list_for_each(p
, &snd_pcm_devices
)
1010 notify
->n_register(list_entry(p
, struct snd_pcm
, list
));
1012 up(®ister_mutex
);
1020 static void snd_pcm_proc_read(struct snd_info_entry
*entry
,
1021 struct snd_info_buffer
*buffer
)
1023 struct list_head
*p
;
1024 struct snd_pcm
*pcm
;
1026 down(®ister_mutex
);
1027 list_for_each(p
, &snd_pcm_devices
) {
1028 pcm
= list_entry(p
, struct snd_pcm
, list
);
1029 snd_iprintf(buffer
, "%02i-%02i: %s : %s",
1030 pcm
->card
->number
, pcm
->device
, pcm
->id
, pcm
->name
);
1031 if (pcm
->streams
[SNDRV_PCM_STREAM_PLAYBACK
].substream
)
1032 snd_iprintf(buffer
, " : playback %i",
1033 pcm
->streams
[SNDRV_PCM_STREAM_PLAYBACK
].substream_count
);
1034 if (pcm
->streams
[SNDRV_PCM_STREAM_CAPTURE
].substream
)
1035 snd_iprintf(buffer
, " : capture %i",
1036 pcm
->streams
[SNDRV_PCM_STREAM_CAPTURE
].substream_count
);
1037 snd_iprintf(buffer
, "\n");
1039 up(®ister_mutex
);
1046 static struct snd_info_entry
*snd_pcm_proc_entry
= NULL
;
1048 static int __init
alsa_pcm_init(void)
1050 struct snd_info_entry
*entry
;
1052 snd_ctl_register_ioctl(snd_pcm_control_ioctl
);
1053 snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl
);
1054 if ((entry
= snd_info_create_module_entry(THIS_MODULE
, "pcm", NULL
)) != NULL
) {
1055 snd_info_set_text_ops(entry
, NULL
, SNDRV_CARDS
* SNDRV_PCM_DEVICES
* 128,
1057 if (snd_info_register(entry
) < 0) {
1058 snd_info_free_entry(entry
);
1062 snd_pcm_proc_entry
= entry
;
1066 static void __exit
alsa_pcm_exit(void)
1068 snd_ctl_unregister_ioctl(snd_pcm_control_ioctl
);
1069 snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl
);
1070 if (snd_pcm_proc_entry
) {
1071 snd_info_unregister(snd_pcm_proc_entry
);
1072 snd_pcm_proc_entry
= NULL
;
1076 module_init(alsa_pcm_init
)
1077 module_exit(alsa_pcm_exit
)
1079 EXPORT_SYMBOL(snd_pcm_new
);
1080 EXPORT_SYMBOL(snd_pcm_new_stream
);
1081 EXPORT_SYMBOL(snd_pcm_notify
);
1082 EXPORT_SYMBOL(snd_pcm_open_substream
);
1083 EXPORT_SYMBOL(snd_pcm_release_substream
);
1084 EXPORT_SYMBOL(snd_pcm_format_name
);
1086 EXPORT_SYMBOL(snd_pcm_link_rwlock
);
1088 EXPORT_SYMBOL(snd_pcm_suspend
);
1089 EXPORT_SYMBOL(snd_pcm_suspend_all
);
1091 EXPORT_SYMBOL(snd_pcm_kernel_playback_ioctl
);
1092 EXPORT_SYMBOL(snd_pcm_kernel_capture_ioctl
);
1093 EXPORT_SYMBOL(snd_pcm_kernel_ioctl
);
1094 EXPORT_SYMBOL(snd_pcm_mmap_data
);
1095 #if SNDRV_PCM_INFO_MMAP_IOMEM
1096 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem
);
1099 EXPORT_SYMBOL(snd_pcm_format_signed
);
1100 EXPORT_SYMBOL(snd_pcm_format_unsigned
);
1101 EXPORT_SYMBOL(snd_pcm_format_linear
);
1102 EXPORT_SYMBOL(snd_pcm_format_little_endian
);
1103 EXPORT_SYMBOL(snd_pcm_format_big_endian
);
1104 EXPORT_SYMBOL(snd_pcm_format_width
);
1105 EXPORT_SYMBOL(snd_pcm_format_physical_width
);
1106 EXPORT_SYMBOL(snd_pcm_format_size
);
1107 EXPORT_SYMBOL(snd_pcm_format_silence_64
);
1108 EXPORT_SYMBOL(snd_pcm_format_set_silence
);
1109 EXPORT_SYMBOL(snd_pcm_build_linear_format
);
1110 EXPORT_SYMBOL(snd_pcm_limit_hw_rates
);