2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@perex.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
23 #include <linux/file.h>
24 #include <linux/slab.h>
25 #include <linux/time.h>
26 #include <linux/pm_qos_params.h>
27 #include <linux/uio.h>
28 #include <linux/dma-mapping.h>
29 #include <sound/core.h>
30 #include <sound/control.h>
31 #include <sound/info.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/timer.h>
35 #include <sound/minors.h>
37 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
38 #include <dma-coherence.h>
45 struct snd_pcm_hw_params_old
{
47 unsigned int masks
[SNDRV_PCM_HW_PARAM_SUBFORMAT
-
48 SNDRV_PCM_HW_PARAM_ACCESS
+ 1];
49 struct snd_interval intervals
[SNDRV_PCM_HW_PARAM_TICK_TIME
-
50 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
+ 1];
55 unsigned int rate_num
;
56 unsigned int rate_den
;
57 snd_pcm_uframes_t fifo_size
;
58 unsigned char reserved
[64];
61 #ifdef CONFIG_SND_SUPPORT_OLD_API
62 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
63 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
65 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
66 struct snd_pcm_hw_params_old __user
* _oparams
);
67 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
68 struct snd_pcm_hw_params_old __user
* _oparams
);
70 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
);
76 DEFINE_RWLOCK(snd_pcm_link_rwlock
);
77 EXPORT_SYMBOL(snd_pcm_link_rwlock
);
79 static DECLARE_RWSEM(snd_pcm_link_rwsem
);
81 static inline mm_segment_t
snd_enter_user(void)
83 mm_segment_t fs
= get_fs();
88 static inline void snd_leave_user(mm_segment_t fs
)
95 int snd_pcm_info(struct snd_pcm_substream
*substream
, struct snd_pcm_info
*info
)
97 struct snd_pcm_runtime
*runtime
;
98 struct snd_pcm
*pcm
= substream
->pcm
;
99 struct snd_pcm_str
*pstr
= substream
->pstr
;
101 memset(info
, 0, sizeof(*info
));
102 info
->card
= pcm
->card
->number
;
103 info
->device
= pcm
->device
;
104 info
->stream
= substream
->stream
;
105 info
->subdevice
= substream
->number
;
106 strlcpy(info
->id
, pcm
->id
, sizeof(info
->id
));
107 strlcpy(info
->name
, pcm
->name
, sizeof(info
->name
));
108 info
->dev_class
= pcm
->dev_class
;
109 info
->dev_subclass
= pcm
->dev_subclass
;
110 info
->subdevices_count
= pstr
->substream_count
;
111 info
->subdevices_avail
= pstr
->substream_count
- pstr
->substream_opened
;
112 strlcpy(info
->subname
, substream
->name
, sizeof(info
->subname
));
113 runtime
= substream
->runtime
;
114 /* AB: FIXME!!! This is definitely nonsense */
116 info
->sync
= runtime
->sync
;
117 substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_INFO
, info
);
122 int snd_pcm_info_user(struct snd_pcm_substream
*substream
,
123 struct snd_pcm_info __user
* _info
)
125 struct snd_pcm_info
*info
;
128 info
= kmalloc(sizeof(*info
), GFP_KERNEL
);
131 err
= snd_pcm_info(substream
, info
);
133 if (copy_to_user(_info
, info
, sizeof(*info
)))
143 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
144 static const char * const snd_pcm_hw_param_names
[] = {
148 HW_PARAM(SAMPLE_BITS
),
149 HW_PARAM(FRAME_BITS
),
152 HW_PARAM(PERIOD_TIME
),
153 HW_PARAM(PERIOD_SIZE
),
154 HW_PARAM(PERIOD_BYTES
),
156 HW_PARAM(BUFFER_TIME
),
157 HW_PARAM(BUFFER_SIZE
),
158 HW_PARAM(BUFFER_BYTES
),
163 int snd_pcm_hw_refine(struct snd_pcm_substream
*substream
,
164 struct snd_pcm_hw_params
*params
)
167 struct snd_pcm_hardware
*hw
;
168 struct snd_interval
*i
= NULL
;
169 struct snd_mask
*m
= NULL
;
170 struct snd_pcm_hw_constraints
*constrs
= &substream
->runtime
->hw_constraints
;
171 unsigned int rstamps
[constrs
->rules_num
];
172 unsigned int vstamps
[SNDRV_PCM_HW_PARAM_LAST_INTERVAL
+ 1];
173 unsigned int stamp
= 2;
177 params
->fifo_size
= 0;
178 if (params
->rmask
& (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS
))
180 if (params
->rmask
& (1 << SNDRV_PCM_HW_PARAM_RATE
)) {
181 params
->rate_num
= 0;
182 params
->rate_den
= 0;
185 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
186 m
= hw_param_mask(params
, k
);
187 if (snd_mask_empty(m
))
189 if (!(params
->rmask
& (1 << k
)))
192 printk(KERN_DEBUG
"%s = ", snd_pcm_hw_param_names
[k
]);
193 printk("%04x%04x%04x%04x -> ", m
->bits
[3], m
->bits
[2], m
->bits
[1], m
->bits
[0]);
195 changed
= snd_mask_refine(m
, constrs_mask(constrs
, k
));
197 printk("%04x%04x%04x%04x\n", m
->bits
[3], m
->bits
[2], m
->bits
[1], m
->bits
[0]);
200 params
->cmask
|= 1 << k
;
205 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
206 i
= hw_param_interval(params
, k
);
207 if (snd_interval_empty(i
))
209 if (!(params
->rmask
& (1 << k
)))
212 printk(KERN_DEBUG
"%s = ", snd_pcm_hw_param_names
[k
]);
217 i
->openmin
? '(' : '[', i
->min
,
218 i
->max
, i
->openmax
? ')' : ']');
221 changed
= snd_interval_refine(i
, constrs_interval(constrs
, k
));
226 printk("%c%u %u%c\n",
227 i
->openmin
? '(' : '[', i
->min
,
228 i
->max
, i
->openmax
? ')' : ']');
231 params
->cmask
|= 1 << k
;
236 for (k
= 0; k
< constrs
->rules_num
; k
++)
238 for (k
= 0; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++)
239 vstamps
[k
] = (params
->rmask
& (1 << k
)) ? 1 : 0;
242 for (k
= 0; k
< constrs
->rules_num
; k
++) {
243 struct snd_pcm_hw_rule
*r
= &constrs
->rules
[k
];
246 if (r
->cond
&& !(r
->cond
& params
->flags
))
248 for (d
= 0; r
->deps
[d
] >= 0; d
++) {
249 if (vstamps
[r
->deps
[d
]] > rstamps
[k
]) {
257 printk(KERN_DEBUG
"Rule %d [%p]: ", k
, r
->func
);
259 printk("%s = ", snd_pcm_hw_param_names
[r
->var
]);
260 if (hw_is_mask(r
->var
)) {
261 m
= hw_param_mask(params
, r
->var
);
262 printk("%x", *m
->bits
);
264 i
= hw_param_interval(params
, r
->var
);
269 i
->openmin
? '(' : '[', i
->min
,
270 i
->max
, i
->openmax
? ')' : ']');
274 changed
= r
->func(params
, r
);
278 if (hw_is_mask(r
->var
))
279 printk("%x", *m
->bits
);
285 i
->openmin
? '(' : '[', i
->min
,
286 i
->max
, i
->openmax
? ')' : ']');
292 if (changed
&& r
->var
>= 0) {
293 params
->cmask
|= (1 << r
->var
);
294 vstamps
[r
->var
] = stamp
;
302 if (!params
->msbits
) {
303 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
);
304 if (snd_interval_single(i
))
305 params
->msbits
= snd_interval_value(i
);
308 if (!params
->rate_den
) {
309 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
310 if (snd_interval_single(i
)) {
311 params
->rate_num
= snd_interval_value(i
);
312 params
->rate_den
= 1;
316 hw
= &substream
->runtime
->hw
;
318 params
->info
= hw
->info
& ~SNDRV_PCM_INFO_FIFO_IN_FRAMES
;
319 if (!params
->fifo_size
) {
320 m
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
321 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
322 if (snd_mask_min(m
) == snd_mask_max(m
) &&
323 snd_interval_min(i
) == snd_interval_max(i
)) {
324 changed
= substream
->ops
->ioctl(substream
,
325 SNDRV_PCM_IOCTL1_FIFO_SIZE
, params
);
334 EXPORT_SYMBOL(snd_pcm_hw_refine
);
336 static int snd_pcm_hw_refine_user(struct snd_pcm_substream
*substream
,
337 struct snd_pcm_hw_params __user
* _params
)
339 struct snd_pcm_hw_params
*params
;
342 params
= memdup_user(_params
, sizeof(*params
));
344 return PTR_ERR(params
);
346 err
= snd_pcm_hw_refine(substream
, params
);
347 if (copy_to_user(_params
, params
, sizeof(*params
))) {
356 static int period_to_usecs(struct snd_pcm_runtime
*runtime
)
361 return -1; /* invalid */
363 /* take 75% of period time as the deadline */
364 usecs
= (750000 / runtime
->rate
) * runtime
->period_size
;
365 usecs
+= ((750000 % runtime
->rate
) * runtime
->period_size
) /
371 static int snd_pcm_hw_params(struct snd_pcm_substream
*substream
,
372 struct snd_pcm_hw_params
*params
)
374 struct snd_pcm_runtime
*runtime
;
377 snd_pcm_uframes_t frames
;
379 if (PCM_RUNTIME_CHECK(substream
))
381 runtime
= substream
->runtime
;
382 snd_pcm_stream_lock_irq(substream
);
383 switch (runtime
->status
->state
) {
384 case SNDRV_PCM_STATE_OPEN
:
385 case SNDRV_PCM_STATE_SETUP
:
386 case SNDRV_PCM_STATE_PREPARED
:
389 snd_pcm_stream_unlock_irq(substream
);
392 snd_pcm_stream_unlock_irq(substream
);
393 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
394 if (!substream
->oss
.oss
)
396 if (atomic_read(&substream
->mmap_count
))
400 err
= snd_pcm_hw_refine(substream
, params
);
404 err
= snd_pcm_hw_params_choose(substream
, params
);
408 if (substream
->ops
->hw_params
!= NULL
) {
409 err
= substream
->ops
->hw_params(substream
, params
);
414 runtime
->access
= params_access(params
);
415 runtime
->format
= params_format(params
);
416 runtime
->subformat
= params_subformat(params
);
417 runtime
->channels
= params_channels(params
);
418 runtime
->rate
= params_rate(params
);
419 runtime
->period_size
= params_period_size(params
);
420 runtime
->periods
= params_periods(params
);
421 runtime
->buffer_size
= params_buffer_size(params
);
422 runtime
->info
= params
->info
;
423 runtime
->rate_num
= params
->rate_num
;
424 runtime
->rate_den
= params
->rate_den
;
425 runtime
->no_period_wakeup
=
426 (params
->info
& SNDRV_PCM_INFO_NO_PERIOD_WAKEUP
) &&
427 (params
->flags
& SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP
);
429 bits
= snd_pcm_format_physical_width(runtime
->format
);
430 runtime
->sample_bits
= bits
;
431 bits
*= runtime
->channels
;
432 runtime
->frame_bits
= bits
;
434 while (bits
% 8 != 0) {
438 runtime
->byte_align
= bits
/ 8;
439 runtime
->min_align
= frames
;
441 /* Default sw params */
442 runtime
->tstamp_mode
= SNDRV_PCM_TSTAMP_NONE
;
443 runtime
->period_step
= 1;
444 runtime
->control
->avail_min
= runtime
->period_size
;
445 runtime
->start_threshold
= 1;
446 runtime
->stop_threshold
= runtime
->buffer_size
;
447 runtime
->silence_threshold
= 0;
448 runtime
->silence_size
= 0;
449 runtime
->boundary
= runtime
->buffer_size
;
450 while (runtime
->boundary
* 2 <= LONG_MAX
- runtime
->buffer_size
)
451 runtime
->boundary
*= 2;
453 snd_pcm_timer_resolution_change(substream
);
454 runtime
->status
->state
= SNDRV_PCM_STATE_SETUP
;
456 if (pm_qos_request_active(&substream
->latency_pm_qos_req
))
457 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
458 if ((usecs
= period_to_usecs(runtime
)) >= 0)
459 pm_qos_add_request(&substream
->latency_pm_qos_req
,
460 PM_QOS_CPU_DMA_LATENCY
, usecs
);
463 /* hardware might be unuseable from this time,
464 so we force application to retry to set
465 the correct hardware parameter settings */
466 runtime
->status
->state
= SNDRV_PCM_STATE_OPEN
;
467 if (substream
->ops
->hw_free
!= NULL
)
468 substream
->ops
->hw_free(substream
);
472 static int snd_pcm_hw_params_user(struct snd_pcm_substream
*substream
,
473 struct snd_pcm_hw_params __user
* _params
)
475 struct snd_pcm_hw_params
*params
;
478 params
= memdup_user(_params
, sizeof(*params
));
480 return PTR_ERR(params
);
482 err
= snd_pcm_hw_params(substream
, params
);
483 if (copy_to_user(_params
, params
, sizeof(*params
))) {
492 static int snd_pcm_hw_free(struct snd_pcm_substream
*substream
)
494 struct snd_pcm_runtime
*runtime
;
497 if (PCM_RUNTIME_CHECK(substream
))
499 runtime
= substream
->runtime
;
500 snd_pcm_stream_lock_irq(substream
);
501 switch (runtime
->status
->state
) {
502 case SNDRV_PCM_STATE_SETUP
:
503 case SNDRV_PCM_STATE_PREPARED
:
506 snd_pcm_stream_unlock_irq(substream
);
509 snd_pcm_stream_unlock_irq(substream
);
510 if (atomic_read(&substream
->mmap_count
))
512 if (substream
->ops
->hw_free
)
513 result
= substream
->ops
->hw_free(substream
);
514 runtime
->status
->state
= SNDRV_PCM_STATE_OPEN
;
515 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
519 static int snd_pcm_sw_params(struct snd_pcm_substream
*substream
,
520 struct snd_pcm_sw_params
*params
)
522 struct snd_pcm_runtime
*runtime
;
525 if (PCM_RUNTIME_CHECK(substream
))
527 runtime
= substream
->runtime
;
528 snd_pcm_stream_lock_irq(substream
);
529 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
530 snd_pcm_stream_unlock_irq(substream
);
533 snd_pcm_stream_unlock_irq(substream
);
535 if (params
->tstamp_mode
> SNDRV_PCM_TSTAMP_LAST
)
537 if (params
->avail_min
== 0)
539 if (params
->silence_size
>= runtime
->boundary
) {
540 if (params
->silence_threshold
!= 0)
543 if (params
->silence_size
> params
->silence_threshold
)
545 if (params
->silence_threshold
> runtime
->buffer_size
)
549 snd_pcm_stream_lock_irq(substream
);
550 runtime
->tstamp_mode
= params
->tstamp_mode
;
551 runtime
->period_step
= params
->period_step
;
552 runtime
->control
->avail_min
= params
->avail_min
;
553 runtime
->start_threshold
= params
->start_threshold
;
554 runtime
->stop_threshold
= params
->stop_threshold
;
555 runtime
->silence_threshold
= params
->silence_threshold
;
556 runtime
->silence_size
= params
->silence_size
;
557 params
->boundary
= runtime
->boundary
;
558 if (snd_pcm_running(substream
)) {
559 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
560 runtime
->silence_size
> 0)
561 snd_pcm_playback_silence(substream
, ULONG_MAX
);
562 err
= snd_pcm_update_state(substream
, runtime
);
564 snd_pcm_stream_unlock_irq(substream
);
568 static int snd_pcm_sw_params_user(struct snd_pcm_substream
*substream
,
569 struct snd_pcm_sw_params __user
* _params
)
571 struct snd_pcm_sw_params params
;
573 if (copy_from_user(¶ms
, _params
, sizeof(params
)))
575 err
= snd_pcm_sw_params(substream
, ¶ms
);
576 if (copy_to_user(_params
, ¶ms
, sizeof(params
)))
581 int snd_pcm_status(struct snd_pcm_substream
*substream
,
582 struct snd_pcm_status
*status
)
584 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
586 snd_pcm_stream_lock_irq(substream
);
587 status
->state
= runtime
->status
->state
;
588 status
->suspended_state
= runtime
->status
->suspended_state
;
589 if (status
->state
== SNDRV_PCM_STATE_OPEN
)
591 status
->trigger_tstamp
= runtime
->trigger_tstamp
;
592 if (snd_pcm_running(substream
)) {
593 snd_pcm_update_hw_ptr(substream
);
594 if (runtime
->tstamp_mode
== SNDRV_PCM_TSTAMP_ENABLE
) {
595 status
->tstamp
= runtime
->status
->tstamp
;
599 snd_pcm_gettime(runtime
, &status
->tstamp
);
601 status
->appl_ptr
= runtime
->control
->appl_ptr
;
602 status
->hw_ptr
= runtime
->status
->hw_ptr
;
603 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
604 status
->avail
= snd_pcm_playback_avail(runtime
);
605 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
||
606 runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
607 status
->delay
= runtime
->buffer_size
- status
->avail
;
608 status
->delay
+= runtime
->delay
;
612 status
->avail
= snd_pcm_capture_avail(runtime
);
613 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
)
614 status
->delay
= status
->avail
+ runtime
->delay
;
618 status
->avail_max
= runtime
->avail_max
;
619 status
->overrange
= runtime
->overrange
;
620 runtime
->avail_max
= 0;
621 runtime
->overrange
= 0;
623 snd_pcm_stream_unlock_irq(substream
);
627 static int snd_pcm_status_user(struct snd_pcm_substream
*substream
,
628 struct snd_pcm_status __user
* _status
)
630 struct snd_pcm_status status
;
633 memset(&status
, 0, sizeof(status
));
634 res
= snd_pcm_status(substream
, &status
);
637 if (copy_to_user(_status
, &status
, sizeof(status
)))
642 static int snd_pcm_channel_info(struct snd_pcm_substream
*substream
,
643 struct snd_pcm_channel_info
* info
)
645 struct snd_pcm_runtime
*runtime
;
646 unsigned int channel
;
648 channel
= info
->channel
;
649 runtime
= substream
->runtime
;
650 snd_pcm_stream_lock_irq(substream
);
651 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
652 snd_pcm_stream_unlock_irq(substream
);
655 snd_pcm_stream_unlock_irq(substream
);
656 if (channel
>= runtime
->channels
)
658 memset(info
, 0, sizeof(*info
));
659 info
->channel
= channel
;
660 return substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_CHANNEL_INFO
, info
);
663 static int snd_pcm_channel_info_user(struct snd_pcm_substream
*substream
,
664 struct snd_pcm_channel_info __user
* _info
)
666 struct snd_pcm_channel_info info
;
669 if (copy_from_user(&info
, _info
, sizeof(info
)))
671 res
= snd_pcm_channel_info(substream
, &info
);
674 if (copy_to_user(_info
, &info
, sizeof(info
)))
679 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream
*substream
)
681 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
682 if (runtime
->trigger_master
== NULL
)
684 if (runtime
->trigger_master
== substream
) {
685 snd_pcm_gettime(runtime
, &runtime
->trigger_tstamp
);
687 snd_pcm_trigger_tstamp(runtime
->trigger_master
);
688 runtime
->trigger_tstamp
= runtime
->trigger_master
->runtime
->trigger_tstamp
;
690 runtime
->trigger_master
= NULL
;
694 int (*pre_action
)(struct snd_pcm_substream
*substream
, int state
);
695 int (*do_action
)(struct snd_pcm_substream
*substream
, int state
);
696 void (*undo_action
)(struct snd_pcm_substream
*substream
, int state
);
697 void (*post_action
)(struct snd_pcm_substream
*substream
, int state
);
701 * this functions is core for handling of linked stream
702 * Note: the stream state might be changed also on failure
703 * Note2: call with calling stream lock + link lock
705 static int snd_pcm_action_group(struct action_ops
*ops
,
706 struct snd_pcm_substream
*substream
,
707 int state
, int do_lock
)
709 struct snd_pcm_substream
*s
= NULL
;
710 struct snd_pcm_substream
*s1
;
713 snd_pcm_group_for_each_entry(s
, substream
) {
714 if (do_lock
&& s
!= substream
)
715 spin_lock_nested(&s
->self_group
.lock
,
716 SINGLE_DEPTH_NESTING
);
717 res
= ops
->pre_action(s
, state
);
721 snd_pcm_group_for_each_entry(s
, substream
) {
722 res
= ops
->do_action(s
, state
);
724 if (ops
->undo_action
) {
725 snd_pcm_group_for_each_entry(s1
, substream
) {
726 if (s1
== s
) /* failed stream */
728 ops
->undo_action(s1
, state
);
731 s
= NULL
; /* unlock all */
735 snd_pcm_group_for_each_entry(s
, substream
) {
736 ops
->post_action(s
, state
);
741 snd_pcm_group_for_each_entry(s1
, substream
) {
743 spin_unlock(&s1
->self_group
.lock
);
744 if (s1
== s
) /* end */
752 * Note: call with stream lock
754 static int snd_pcm_action_single(struct action_ops
*ops
,
755 struct snd_pcm_substream
*substream
,
760 res
= ops
->pre_action(substream
, state
);
763 res
= ops
->do_action(substream
, state
);
765 ops
->post_action(substream
, state
);
766 else if (ops
->undo_action
)
767 ops
->undo_action(substream
, state
);
772 * Note: call with stream lock
774 static int snd_pcm_action(struct action_ops
*ops
,
775 struct snd_pcm_substream
*substream
,
780 if (snd_pcm_stream_linked(substream
)) {
781 if (!spin_trylock(&substream
->group
->lock
)) {
782 spin_unlock(&substream
->self_group
.lock
);
783 spin_lock(&substream
->group
->lock
);
784 spin_lock(&substream
->self_group
.lock
);
786 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
787 spin_unlock(&substream
->group
->lock
);
789 res
= snd_pcm_action_single(ops
, substream
, state
);
795 * Note: don't use any locks before
797 static int snd_pcm_action_lock_irq(struct action_ops
*ops
,
798 struct snd_pcm_substream
*substream
,
803 read_lock_irq(&snd_pcm_link_rwlock
);
804 if (snd_pcm_stream_linked(substream
)) {
805 spin_lock(&substream
->group
->lock
);
806 spin_lock(&substream
->self_group
.lock
);
807 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
808 spin_unlock(&substream
->self_group
.lock
);
809 spin_unlock(&substream
->group
->lock
);
811 spin_lock(&substream
->self_group
.lock
);
812 res
= snd_pcm_action_single(ops
, substream
, state
);
813 spin_unlock(&substream
->self_group
.lock
);
815 read_unlock_irq(&snd_pcm_link_rwlock
);
821 static int snd_pcm_action_nonatomic(struct action_ops
*ops
,
822 struct snd_pcm_substream
*substream
,
827 down_read(&snd_pcm_link_rwsem
);
828 if (snd_pcm_stream_linked(substream
))
829 res
= snd_pcm_action_group(ops
, substream
, state
, 0);
831 res
= snd_pcm_action_single(ops
, substream
, state
);
832 up_read(&snd_pcm_link_rwsem
);
839 static int snd_pcm_pre_start(struct snd_pcm_substream
*substream
, int state
)
841 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
842 if (runtime
->status
->state
!= SNDRV_PCM_STATE_PREPARED
)
844 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
845 !snd_pcm_playback_data(substream
))
847 runtime
->trigger_master
= substream
;
851 static int snd_pcm_do_start(struct snd_pcm_substream
*substream
, int state
)
853 if (substream
->runtime
->trigger_master
!= substream
)
855 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_START
);
858 static void snd_pcm_undo_start(struct snd_pcm_substream
*substream
, int state
)
860 if (substream
->runtime
->trigger_master
== substream
)
861 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
864 static void snd_pcm_post_start(struct snd_pcm_substream
*substream
, int state
)
866 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
867 snd_pcm_trigger_tstamp(substream
);
868 runtime
->hw_ptr_jiffies
= jiffies
;
869 runtime
->hw_ptr_buffer_jiffies
= (runtime
->buffer_size
* HZ
) /
871 runtime
->status
->state
= state
;
872 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
873 runtime
->silence_size
> 0)
874 snd_pcm_playback_silence(substream
, ULONG_MAX
);
875 if (substream
->timer
)
876 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTART
,
877 &runtime
->trigger_tstamp
);
880 static struct action_ops snd_pcm_action_start
= {
881 .pre_action
= snd_pcm_pre_start
,
882 .do_action
= snd_pcm_do_start
,
883 .undo_action
= snd_pcm_undo_start
,
884 .post_action
= snd_pcm_post_start
888 * snd_pcm_start - start all linked streams
889 * @substream: the PCM substream instance
891 int snd_pcm_start(struct snd_pcm_substream
*substream
)
893 return snd_pcm_action(&snd_pcm_action_start
, substream
,
894 SNDRV_PCM_STATE_RUNNING
);
900 static int snd_pcm_pre_stop(struct snd_pcm_substream
*substream
, int state
)
902 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
903 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
905 runtime
->trigger_master
= substream
;
909 static int snd_pcm_do_stop(struct snd_pcm_substream
*substream
, int state
)
911 if (substream
->runtime
->trigger_master
== substream
&&
912 snd_pcm_running(substream
))
913 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
914 return 0; /* unconditonally stop all substreams */
917 static void snd_pcm_post_stop(struct snd_pcm_substream
*substream
, int state
)
919 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
920 if (runtime
->status
->state
!= state
) {
921 snd_pcm_trigger_tstamp(substream
);
922 if (substream
->timer
)
923 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTOP
,
924 &runtime
->trigger_tstamp
);
925 runtime
->status
->state
= state
;
927 wake_up(&runtime
->sleep
);
928 wake_up(&runtime
->tsleep
);
931 static struct action_ops snd_pcm_action_stop
= {
932 .pre_action
= snd_pcm_pre_stop
,
933 .do_action
= snd_pcm_do_stop
,
934 .post_action
= snd_pcm_post_stop
938 * snd_pcm_stop - try to stop all running streams in the substream group
939 * @substream: the PCM substream instance
940 * @state: PCM state after stopping the stream
942 * The state of each stream is then changed to the given state unconditionally.
944 int snd_pcm_stop(struct snd_pcm_substream
*substream
, int state
)
946 return snd_pcm_action(&snd_pcm_action_stop
, substream
, state
);
949 EXPORT_SYMBOL(snd_pcm_stop
);
952 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
953 * @substream: the PCM substream
955 * After stopping, the state is changed to SETUP.
956 * Unlike snd_pcm_stop(), this affects only the given stream.
958 int snd_pcm_drain_done(struct snd_pcm_substream
*substream
)
960 return snd_pcm_action_single(&snd_pcm_action_stop
, substream
,
961 SNDRV_PCM_STATE_SETUP
);
967 static int snd_pcm_pre_pause(struct snd_pcm_substream
*substream
, int push
)
969 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
970 if (!(runtime
->info
& SNDRV_PCM_INFO_PAUSE
))
973 if (runtime
->status
->state
!= SNDRV_PCM_STATE_RUNNING
)
975 } else if (runtime
->status
->state
!= SNDRV_PCM_STATE_PAUSED
)
977 runtime
->trigger_master
= substream
;
981 static int snd_pcm_do_pause(struct snd_pcm_substream
*substream
, int push
)
983 if (substream
->runtime
->trigger_master
!= substream
)
985 /* some drivers might use hw_ptr to recover from the pause -
986 update the hw_ptr now */
988 snd_pcm_update_hw_ptr(substream
);
989 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
990 * a delta between the current jiffies, this gives a large enough
991 * delta, effectively to skip the check once.
993 substream
->runtime
->hw_ptr_jiffies
= jiffies
- HZ
* 1000;
994 return substream
->ops
->trigger(substream
,
995 push
? SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
996 SNDRV_PCM_TRIGGER_PAUSE_RELEASE
);
999 static void snd_pcm_undo_pause(struct snd_pcm_substream
*substream
, int push
)
1001 if (substream
->runtime
->trigger_master
== substream
)
1002 substream
->ops
->trigger(substream
,
1003 push
? SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1004 SNDRV_PCM_TRIGGER_PAUSE_PUSH
);
1007 static void snd_pcm_post_pause(struct snd_pcm_substream
*substream
, int push
)
1009 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1010 snd_pcm_trigger_tstamp(substream
);
1012 runtime
->status
->state
= SNDRV_PCM_STATE_PAUSED
;
1013 if (substream
->timer
)
1014 snd_timer_notify(substream
->timer
,
1015 SNDRV_TIMER_EVENT_MPAUSE
,
1016 &runtime
->trigger_tstamp
);
1017 wake_up(&runtime
->sleep
);
1018 wake_up(&runtime
->tsleep
);
1020 runtime
->status
->state
= SNDRV_PCM_STATE_RUNNING
;
1021 if (substream
->timer
)
1022 snd_timer_notify(substream
->timer
,
1023 SNDRV_TIMER_EVENT_MCONTINUE
,
1024 &runtime
->trigger_tstamp
);
1028 static struct action_ops snd_pcm_action_pause
= {
1029 .pre_action
= snd_pcm_pre_pause
,
1030 .do_action
= snd_pcm_do_pause
,
1031 .undo_action
= snd_pcm_undo_pause
,
1032 .post_action
= snd_pcm_post_pause
1036 * Push/release the pause for all linked streams.
1038 static int snd_pcm_pause(struct snd_pcm_substream
*substream
, int push
)
1040 return snd_pcm_action(&snd_pcm_action_pause
, substream
, push
);
1046 static int snd_pcm_pre_suspend(struct snd_pcm_substream
*substream
, int state
)
1048 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1049 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1051 runtime
->trigger_master
= substream
;
1055 static int snd_pcm_do_suspend(struct snd_pcm_substream
*substream
, int state
)
1057 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1058 if (runtime
->trigger_master
!= substream
)
1060 if (! snd_pcm_running(substream
))
1062 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1063 return 0; /* suspend unconditionally */
1066 static void snd_pcm_post_suspend(struct snd_pcm_substream
*substream
, int state
)
1068 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1069 snd_pcm_trigger_tstamp(substream
);
1070 if (substream
->timer
)
1071 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSUSPEND
,
1072 &runtime
->trigger_tstamp
);
1073 runtime
->status
->suspended_state
= runtime
->status
->state
;
1074 runtime
->status
->state
= SNDRV_PCM_STATE_SUSPENDED
;
1075 wake_up(&runtime
->sleep
);
1076 wake_up(&runtime
->tsleep
);
1079 static struct action_ops snd_pcm_action_suspend
= {
1080 .pre_action
= snd_pcm_pre_suspend
,
1081 .do_action
= snd_pcm_do_suspend
,
1082 .post_action
= snd_pcm_post_suspend
1086 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1087 * @substream: the PCM substream
1089 * After this call, all streams are changed to SUSPENDED state.
1091 int snd_pcm_suspend(struct snd_pcm_substream
*substream
)
1094 unsigned long flags
;
1099 snd_pcm_stream_lock_irqsave(substream
, flags
);
1100 err
= snd_pcm_action(&snd_pcm_action_suspend
, substream
, 0);
1101 snd_pcm_stream_unlock_irqrestore(substream
, flags
);
1105 EXPORT_SYMBOL(snd_pcm_suspend
);
1108 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1109 * @pcm: the PCM instance
1111 * After this call, all streams are changed to SUSPENDED state.
1113 int snd_pcm_suspend_all(struct snd_pcm
*pcm
)
1115 struct snd_pcm_substream
*substream
;
1116 int stream
, err
= 0;
1121 for (stream
= 0; stream
< 2; stream
++) {
1122 for (substream
= pcm
->streams
[stream
].substream
;
1123 substream
; substream
= substream
->next
) {
1124 /* FIXME: the open/close code should lock this as well */
1125 if (substream
->runtime
== NULL
)
1127 err
= snd_pcm_suspend(substream
);
1128 if (err
< 0 && err
!= -EBUSY
)
1135 EXPORT_SYMBOL(snd_pcm_suspend_all
);
1139 static int snd_pcm_pre_resume(struct snd_pcm_substream
*substream
, int state
)
1141 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1142 if (!(runtime
->info
& SNDRV_PCM_INFO_RESUME
))
1144 runtime
->trigger_master
= substream
;
1148 static int snd_pcm_do_resume(struct snd_pcm_substream
*substream
, int state
)
1150 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1151 if (runtime
->trigger_master
!= substream
)
1153 /* DMA not running previously? */
1154 if (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_RUNNING
&&
1155 (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_DRAINING
||
1156 substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
1158 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_RESUME
);
1161 static void snd_pcm_undo_resume(struct snd_pcm_substream
*substream
, int state
)
1163 if (substream
->runtime
->trigger_master
== substream
&&
1164 snd_pcm_running(substream
))
1165 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1168 static void snd_pcm_post_resume(struct snd_pcm_substream
*substream
, int state
)
1170 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1171 snd_pcm_trigger_tstamp(substream
);
1172 if (substream
->timer
)
1173 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MRESUME
,
1174 &runtime
->trigger_tstamp
);
1175 runtime
->status
->state
= runtime
->status
->suspended_state
;
1178 static struct action_ops snd_pcm_action_resume
= {
1179 .pre_action
= snd_pcm_pre_resume
,
1180 .do_action
= snd_pcm_do_resume
,
1181 .undo_action
= snd_pcm_undo_resume
,
1182 .post_action
= snd_pcm_post_resume
1185 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1187 struct snd_card
*card
= substream
->pcm
->card
;
1190 snd_power_lock(card
);
1191 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1192 res
= snd_pcm_action_lock_irq(&snd_pcm_action_resume
, substream
, 0);
1193 snd_power_unlock(card
);
1199 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1204 #endif /* CONFIG_PM */
1209 * Change the RUNNING stream(s) to XRUN state.
1211 static int snd_pcm_xrun(struct snd_pcm_substream
*substream
)
1213 struct snd_card
*card
= substream
->pcm
->card
;
1214 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1217 snd_power_lock(card
);
1218 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1219 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1224 snd_pcm_stream_lock_irq(substream
);
1225 switch (runtime
->status
->state
) {
1226 case SNDRV_PCM_STATE_XRUN
:
1227 result
= 0; /* already there */
1229 case SNDRV_PCM_STATE_RUNNING
:
1230 result
= snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
1235 snd_pcm_stream_unlock_irq(substream
);
1237 snd_power_unlock(card
);
1244 static int snd_pcm_pre_reset(struct snd_pcm_substream
*substream
, int state
)
1246 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1247 switch (runtime
->status
->state
) {
1248 case SNDRV_PCM_STATE_RUNNING
:
1249 case SNDRV_PCM_STATE_PREPARED
:
1250 case SNDRV_PCM_STATE_PAUSED
:
1251 case SNDRV_PCM_STATE_SUSPENDED
:
1258 static int snd_pcm_do_reset(struct snd_pcm_substream
*substream
, int state
)
1260 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1261 int err
= substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_RESET
, NULL
);
1264 runtime
->hw_ptr_base
= 0;
1265 runtime
->hw_ptr_interrupt
= runtime
->status
->hw_ptr
-
1266 runtime
->status
->hw_ptr
% runtime
->period_size
;
1267 runtime
->silence_start
= runtime
->status
->hw_ptr
;
1268 runtime
->silence_filled
= 0;
1272 static void snd_pcm_post_reset(struct snd_pcm_substream
*substream
, int state
)
1274 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1275 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1276 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
1277 runtime
->silence_size
> 0)
1278 snd_pcm_playback_silence(substream
, ULONG_MAX
);
1281 static struct action_ops snd_pcm_action_reset
= {
1282 .pre_action
= snd_pcm_pre_reset
,
1283 .do_action
= snd_pcm_do_reset
,
1284 .post_action
= snd_pcm_post_reset
1287 static int snd_pcm_reset(struct snd_pcm_substream
*substream
)
1289 return snd_pcm_action_nonatomic(&snd_pcm_action_reset
, substream
, 0);
1295 /* we use the second argument for updating f_flags */
1296 static int snd_pcm_pre_prepare(struct snd_pcm_substream
*substream
,
1299 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1300 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1301 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
)
1303 if (snd_pcm_running(substream
))
1305 substream
->f_flags
= f_flags
;
1309 static int snd_pcm_do_prepare(struct snd_pcm_substream
*substream
, int state
)
1312 err
= substream
->ops
->prepare(substream
);
1315 return snd_pcm_do_reset(substream
, 0);
1318 static void snd_pcm_post_prepare(struct snd_pcm_substream
*substream
, int state
)
1320 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1321 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1322 runtime
->status
->state
= SNDRV_PCM_STATE_PREPARED
;
1325 static struct action_ops snd_pcm_action_prepare
= {
1326 .pre_action
= snd_pcm_pre_prepare
,
1327 .do_action
= snd_pcm_do_prepare
,
1328 .post_action
= snd_pcm_post_prepare
1332 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1333 * @substream: the PCM substream instance
1334 * @file: file to refer f_flags
1336 static int snd_pcm_prepare(struct snd_pcm_substream
*substream
,
1340 struct snd_card
*card
= substream
->pcm
->card
;
1344 f_flags
= file
->f_flags
;
1346 f_flags
= substream
->f_flags
;
1348 snd_power_lock(card
);
1349 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1350 res
= snd_pcm_action_nonatomic(&snd_pcm_action_prepare
,
1351 substream
, f_flags
);
1352 snd_power_unlock(card
);
1360 static int snd_pcm_pre_drain_init(struct snd_pcm_substream
*substream
, int state
)
1362 substream
->runtime
->trigger_master
= substream
;
1366 static int snd_pcm_do_drain_init(struct snd_pcm_substream
*substream
, int state
)
1368 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1369 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
1370 switch (runtime
->status
->state
) {
1371 case SNDRV_PCM_STATE_PREPARED
:
1372 /* start playback stream if possible */
1373 if (! snd_pcm_playback_empty(substream
)) {
1374 snd_pcm_do_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1375 snd_pcm_post_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1378 case SNDRV_PCM_STATE_RUNNING
:
1379 runtime
->status
->state
= SNDRV_PCM_STATE_DRAINING
;
1385 /* stop running stream */
1386 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
) {
1387 int new_state
= snd_pcm_capture_avail(runtime
) > 0 ?
1388 SNDRV_PCM_STATE_DRAINING
: SNDRV_PCM_STATE_SETUP
;
1389 snd_pcm_do_stop(substream
, new_state
);
1390 snd_pcm_post_stop(substream
, new_state
);
1396 static void snd_pcm_post_drain_init(struct snd_pcm_substream
*substream
, int state
)
1400 static struct action_ops snd_pcm_action_drain_init
= {
1401 .pre_action
= snd_pcm_pre_drain_init
,
1402 .do_action
= snd_pcm_do_drain_init
,
1403 .post_action
= snd_pcm_post_drain_init
1406 static int snd_pcm_drop(struct snd_pcm_substream
*substream
);
1409 * Drain the stream(s).
1410 * When the substream is linked, sync until the draining of all playback streams
1412 * After this call, all streams are supposed to be either SETUP or DRAINING
1413 * (capture only) state.
1415 static int snd_pcm_drain(struct snd_pcm_substream
*substream
,
1418 struct snd_card
*card
;
1419 struct snd_pcm_runtime
*runtime
;
1420 struct snd_pcm_substream
*s
;
1425 card
= substream
->pcm
->card
;
1426 runtime
= substream
->runtime
;
1428 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1431 snd_power_lock(card
);
1432 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1433 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1435 snd_power_unlock(card
);
1441 if (file
->f_flags
& O_NONBLOCK
)
1443 } else if (substream
->f_flags
& O_NONBLOCK
)
1446 down_read(&snd_pcm_link_rwsem
);
1447 snd_pcm_stream_lock_irq(substream
);
1449 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1450 snd_pcm_pause(substream
, 0);
1452 /* pre-start/stop - all running streams are changed to DRAINING state */
1453 result
= snd_pcm_action(&snd_pcm_action_drain_init
, substream
, 0);
1456 /* in non-blocking, we don't wait in ioctl but let caller poll */
1464 struct snd_pcm_runtime
*to_check
;
1465 if (signal_pending(current
)) {
1466 result
= -ERESTARTSYS
;
1469 /* find a substream to drain */
1471 snd_pcm_group_for_each_entry(s
, substream
) {
1472 if (s
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
)
1474 runtime
= s
->runtime
;
1475 if (runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
1481 break; /* all drained */
1482 init_waitqueue_entry(&wait
, current
);
1483 add_wait_queue(&to_check
->sleep
, &wait
);
1484 set_current_state(TASK_INTERRUPTIBLE
);
1485 snd_pcm_stream_unlock_irq(substream
);
1486 up_read(&snd_pcm_link_rwsem
);
1487 snd_power_unlock(card
);
1488 tout
= schedule_timeout(10 * HZ
);
1489 snd_power_lock(card
);
1490 down_read(&snd_pcm_link_rwsem
);
1491 snd_pcm_stream_lock_irq(substream
);
1492 remove_wait_queue(&to_check
->sleep
, &wait
);
1494 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1497 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1498 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1506 snd_pcm_stream_unlock_irq(substream
);
1507 up_read(&snd_pcm_link_rwsem
);
1508 snd_power_unlock(card
);
1516 * Immediately put all linked substreams into SETUP state.
1518 static int snd_pcm_drop(struct snd_pcm_substream
*substream
)
1520 struct snd_pcm_runtime
*runtime
;
1521 struct snd_card
*card
;
1524 if (PCM_RUNTIME_CHECK(substream
))
1526 runtime
= substream
->runtime
;
1527 card
= substream
->pcm
->card
;
1529 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1530 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
||
1531 runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1534 snd_pcm_stream_lock_irq(substream
);
1536 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1537 snd_pcm_pause(substream
, 0);
1539 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1540 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1541 snd_pcm_stream_unlock_irq(substream
);
1547 /* WARNING: Don't forget to fput back the file */
1548 static struct file
*snd_pcm_file_fd(int fd
)
1551 struct inode
*inode
;
1557 inode
= file
->f_path
.dentry
->d_inode
;
1558 if (!S_ISCHR(inode
->i_mode
) ||
1559 imajor(inode
) != snd_major
) {
1563 minor
= iminor(inode
);
1564 if (!snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_PLAYBACK
) &&
1565 !snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_CAPTURE
)) {
1575 static int snd_pcm_link(struct snd_pcm_substream
*substream
, int fd
)
1579 struct snd_pcm_file
*pcm_file
;
1580 struct snd_pcm_substream
*substream1
;
1582 file
= snd_pcm_file_fd(fd
);
1585 pcm_file
= file
->private_data
;
1586 substream1
= pcm_file
->substream
;
1587 down_write(&snd_pcm_link_rwsem
);
1588 write_lock_irq(&snd_pcm_link_rwlock
);
1589 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1590 substream
->runtime
->status
->state
!= substream1
->runtime
->status
->state
) {
1594 if (snd_pcm_stream_linked(substream1
)) {
1598 if (!snd_pcm_stream_linked(substream
)) {
1599 substream
->group
= kmalloc(sizeof(struct snd_pcm_group
), GFP_ATOMIC
);
1600 if (substream
->group
== NULL
) {
1604 spin_lock_init(&substream
->group
->lock
);
1605 INIT_LIST_HEAD(&substream
->group
->substreams
);
1606 list_add_tail(&substream
->link_list
, &substream
->group
->substreams
);
1607 substream
->group
->count
= 1;
1609 list_add_tail(&substream1
->link_list
, &substream
->group
->substreams
);
1610 substream
->group
->count
++;
1611 substream1
->group
= substream
->group
;
1613 write_unlock_irq(&snd_pcm_link_rwlock
);
1614 up_write(&snd_pcm_link_rwsem
);
1619 static void relink_to_local(struct snd_pcm_substream
*substream
)
1621 substream
->group
= &substream
->self_group
;
1622 INIT_LIST_HEAD(&substream
->self_group
.substreams
);
1623 list_add_tail(&substream
->link_list
, &substream
->self_group
.substreams
);
1626 static int snd_pcm_unlink(struct snd_pcm_substream
*substream
)
1628 struct snd_pcm_substream
*s
;
1631 down_write(&snd_pcm_link_rwsem
);
1632 write_lock_irq(&snd_pcm_link_rwlock
);
1633 if (!snd_pcm_stream_linked(substream
)) {
1637 list_del(&substream
->link_list
);
1638 substream
->group
->count
--;
1639 if (substream
->group
->count
== 1) { /* detach the last stream, too */
1640 snd_pcm_group_for_each_entry(s
, substream
) {
1644 kfree(substream
->group
);
1646 relink_to_local(substream
);
1648 write_unlock_irq(&snd_pcm_link_rwlock
);
1649 up_write(&snd_pcm_link_rwsem
);
1656 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params
*params
,
1657 struct snd_pcm_hw_rule
*rule
)
1659 struct snd_interval t
;
1660 snd_interval_mul(hw_param_interval_c(params
, rule
->deps
[0]),
1661 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1662 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1665 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params
*params
,
1666 struct snd_pcm_hw_rule
*rule
)
1668 struct snd_interval t
;
1669 snd_interval_div(hw_param_interval_c(params
, rule
->deps
[0]),
1670 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1671 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1674 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params
*params
,
1675 struct snd_pcm_hw_rule
*rule
)
1677 struct snd_interval t
;
1678 snd_interval_muldivk(hw_param_interval_c(params
, rule
->deps
[0]),
1679 hw_param_interval_c(params
, rule
->deps
[1]),
1680 (unsigned long) rule
->private, &t
);
1681 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1684 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params
*params
,
1685 struct snd_pcm_hw_rule
*rule
)
1687 struct snd_interval t
;
1688 snd_interval_mulkdiv(hw_param_interval_c(params
, rule
->deps
[0]),
1689 (unsigned long) rule
->private,
1690 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1691 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1694 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params
*params
,
1695 struct snd_pcm_hw_rule
*rule
)
1698 struct snd_interval
*i
= hw_param_interval(params
, rule
->deps
[0]);
1700 struct snd_mask
*mask
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1702 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1704 if (! snd_mask_test(mask
, k
))
1706 bits
= snd_pcm_format_physical_width(k
);
1708 continue; /* ignore invalid formats */
1709 if ((unsigned)bits
< i
->min
|| (unsigned)bits
> i
->max
)
1710 snd_mask_reset(&m
, k
);
1712 return snd_mask_refine(mask
, &m
);
1715 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params
*params
,
1716 struct snd_pcm_hw_rule
*rule
)
1718 struct snd_interval t
;
1724 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1726 if (! snd_mask_test(hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
), k
))
1728 bits
= snd_pcm_format_physical_width(k
);
1730 continue; /* ignore invalid formats */
1731 if (t
.min
> (unsigned)bits
)
1733 if (t
.max
< (unsigned)bits
)
1737 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1740 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1741 #error "Change this table"
1744 static unsigned int rates
[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1745 48000, 64000, 88200, 96000, 176400, 192000 };
1747 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates
= {
1748 .count
= ARRAY_SIZE(rates
),
1752 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params
*params
,
1753 struct snd_pcm_hw_rule
*rule
)
1755 struct snd_pcm_hardware
*hw
= rule
->private;
1756 return snd_interval_list(hw_param_interval(params
, rule
->var
),
1757 snd_pcm_known_rates
.count
,
1758 snd_pcm_known_rates
.list
, hw
->rates
);
1761 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params
*params
,
1762 struct snd_pcm_hw_rule
*rule
)
1764 struct snd_interval t
;
1765 struct snd_pcm_substream
*substream
= rule
->private;
1767 t
.max
= substream
->buffer_bytes_max
;
1771 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1774 int snd_pcm_hw_constraints_init(struct snd_pcm_substream
*substream
)
1776 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1777 struct snd_pcm_hw_constraints
*constrs
= &runtime
->hw_constraints
;
1780 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
1781 snd_mask_any(constrs_mask(constrs
, k
));
1784 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
1785 snd_interval_any(constrs_interval(constrs
, k
));
1788 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_CHANNELS
));
1789 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
));
1790 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
));
1791 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
));
1792 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_FRAME_BITS
));
1794 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1795 snd_pcm_hw_rule_format
, NULL
,
1796 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1799 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1800 snd_pcm_hw_rule_sample_bits
, NULL
,
1801 SNDRV_PCM_HW_PARAM_FORMAT
,
1802 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1805 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1806 snd_pcm_hw_rule_div
, NULL
,
1807 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1810 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1811 snd_pcm_hw_rule_mul
, NULL
,
1812 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1815 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1816 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1817 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1820 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1821 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1822 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, -1);
1825 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
1826 snd_pcm_hw_rule_div
, NULL
,
1827 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1830 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1831 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1832 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
, -1);
1835 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1836 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1837 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_BUFFER_TIME
, -1);
1840 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIODS
,
1841 snd_pcm_hw_rule_div
, NULL
,
1842 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1845 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1846 snd_pcm_hw_rule_div
, NULL
,
1847 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1850 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1851 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1852 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1855 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1856 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1857 SNDRV_PCM_HW_PARAM_PERIOD_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1860 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1861 snd_pcm_hw_rule_mul
, NULL
,
1862 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1865 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1866 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1867 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1870 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1871 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1872 SNDRV_PCM_HW_PARAM_BUFFER_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1875 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1876 snd_pcm_hw_rule_muldivk
, (void*) 8,
1877 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1880 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1881 snd_pcm_hw_rule_muldivk
, (void*) 8,
1882 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1885 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
1886 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1887 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1890 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME
,
1891 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1892 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1898 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream
*substream
)
1900 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1901 struct snd_pcm_hardware
*hw
= &runtime
->hw
;
1903 unsigned int mask
= 0;
1905 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1906 mask
|= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED
;
1907 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1908 mask
|= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
;
1909 if (hw
->info
& SNDRV_PCM_INFO_MMAP
) {
1910 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1911 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED
;
1912 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1913 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED
;
1914 if (hw
->info
& SNDRV_PCM_INFO_COMPLEX
)
1915 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX
;
1917 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_ACCESS
, mask
);
1921 err
= snd_pcm_hw_constraint_mask64(runtime
, SNDRV_PCM_HW_PARAM_FORMAT
, hw
->formats
);
1925 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_SUBFORMAT
, 1 << SNDRV_PCM_SUBFORMAT_STD
);
1929 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_CHANNELS
,
1930 hw
->channels_min
, hw
->channels_max
);
1934 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_RATE
,
1935 hw
->rate_min
, hw
->rate_max
);
1939 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1940 hw
->period_bytes_min
, hw
->period_bytes_max
);
1944 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIODS
,
1945 hw
->periods_min
, hw
->periods_max
);
1949 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1950 hw
->period_bytes_min
, hw
->buffer_bytes_max
);
1954 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1955 snd_pcm_hw_rule_buffer_bytes_max
, substream
,
1956 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, -1);
1961 if (runtime
->dma_bytes
) {
1962 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, 0, runtime
->dma_bytes
);
1967 if (!(hw
->rates
& (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))) {
1968 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1969 snd_pcm_hw_rule_rate
, hw
,
1970 SNDRV_PCM_HW_PARAM_RATE
, -1);
1975 /* FIXME: this belong to lowlevel */
1976 snd_pcm_hw_constraint_integer(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
);
1981 static void pcm_release_private(struct snd_pcm_substream
*substream
)
1983 snd_pcm_unlink(substream
);
1986 void snd_pcm_release_substream(struct snd_pcm_substream
*substream
)
1988 substream
->ref_count
--;
1989 if (substream
->ref_count
> 0)
1992 snd_pcm_drop(substream
);
1993 if (substream
->hw_opened
) {
1994 if (substream
->ops
->hw_free
!= NULL
)
1995 substream
->ops
->hw_free(substream
);
1996 substream
->ops
->close(substream
);
1997 substream
->hw_opened
= 0;
1999 if (pm_qos_request_active(&substream
->latency_pm_qos_req
))
2000 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
2001 if (substream
->pcm_release
) {
2002 substream
->pcm_release(substream
);
2003 substream
->pcm_release
= NULL
;
2005 snd_pcm_detach_substream(substream
);
2008 EXPORT_SYMBOL(snd_pcm_release_substream
);
2010 int snd_pcm_open_substream(struct snd_pcm
*pcm
, int stream
,
2012 struct snd_pcm_substream
**rsubstream
)
2014 struct snd_pcm_substream
*substream
;
2017 err
= snd_pcm_attach_substream(pcm
, stream
, file
, &substream
);
2020 if (substream
->ref_count
> 1) {
2021 *rsubstream
= substream
;
2025 err
= snd_pcm_hw_constraints_init(substream
);
2027 snd_printd("snd_pcm_hw_constraints_init failed\n");
2031 if ((err
= substream
->ops
->open(substream
)) < 0)
2034 substream
->hw_opened
= 1;
2036 err
= snd_pcm_hw_constraints_complete(substream
);
2038 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2042 *rsubstream
= substream
;
2046 snd_pcm_release_substream(substream
);
2050 EXPORT_SYMBOL(snd_pcm_open_substream
);
2052 static int snd_pcm_open_file(struct file
*file
,
2053 struct snd_pcm
*pcm
,
2055 struct snd_pcm_file
**rpcm_file
)
2057 struct snd_pcm_file
*pcm_file
;
2058 struct snd_pcm_substream
*substream
;
2059 struct snd_pcm_str
*str
;
2065 err
= snd_pcm_open_substream(pcm
, stream
, file
, &substream
);
2069 pcm_file
= kzalloc(sizeof(*pcm_file
), GFP_KERNEL
);
2070 if (pcm_file
== NULL
) {
2071 snd_pcm_release_substream(substream
);
2074 pcm_file
->substream
= substream
;
2075 if (substream
->ref_count
== 1) {
2076 str
= substream
->pstr
;
2077 substream
->file
= pcm_file
;
2078 substream
->pcm_release
= pcm_release_private
;
2080 file
->private_data
= pcm_file
;
2082 *rpcm_file
= pcm_file
;
2086 static int snd_pcm_playback_open(struct inode
*inode
, struct file
*file
)
2088 struct snd_pcm
*pcm
;
2089 int err
= nonseekable_open(inode
, file
);
2092 pcm
= snd_lookup_minor_data(iminor(inode
),
2093 SNDRV_DEVICE_TYPE_PCM_PLAYBACK
);
2094 return snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_PLAYBACK
);
2097 static int snd_pcm_capture_open(struct inode
*inode
, struct file
*file
)
2099 struct snd_pcm
*pcm
;
2100 int err
= nonseekable_open(inode
, file
);
2103 pcm
= snd_lookup_minor_data(iminor(inode
),
2104 SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
2105 return snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_CAPTURE
);
2108 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
)
2111 struct snd_pcm_file
*pcm_file
;
2118 err
= snd_card_file_add(pcm
->card
, file
);
2121 if (!try_module_get(pcm
->card
->module
)) {
2125 init_waitqueue_entry(&wait
, current
);
2126 add_wait_queue(&pcm
->open_wait
, &wait
);
2127 mutex_lock(&pcm
->open_mutex
);
2129 err
= snd_pcm_open_file(file
, pcm
, stream
, &pcm_file
);
2132 if (err
== -EAGAIN
) {
2133 if (file
->f_flags
& O_NONBLOCK
) {
2139 set_current_state(TASK_INTERRUPTIBLE
);
2140 mutex_unlock(&pcm
->open_mutex
);
2142 mutex_lock(&pcm
->open_mutex
);
2143 if (signal_pending(current
)) {
2148 remove_wait_queue(&pcm
->open_wait
, &wait
);
2149 mutex_unlock(&pcm
->open_mutex
);
2155 module_put(pcm
->card
->module
);
2157 snd_card_file_remove(pcm
->card
, file
);
2162 static int snd_pcm_release(struct inode
*inode
, struct file
*file
)
2164 struct snd_pcm
*pcm
;
2165 struct snd_pcm_substream
*substream
;
2166 struct snd_pcm_file
*pcm_file
;
2168 pcm_file
= file
->private_data
;
2169 substream
= pcm_file
->substream
;
2170 if (snd_BUG_ON(!substream
))
2172 pcm
= substream
->pcm
;
2173 mutex_lock(&pcm
->open_mutex
);
2174 snd_pcm_release_substream(substream
);
2176 mutex_unlock(&pcm
->open_mutex
);
2177 wake_up(&pcm
->open_wait
);
2178 module_put(pcm
->card
->module
);
2179 snd_card_file_remove(pcm
->card
, file
);
2183 static snd_pcm_sframes_t
snd_pcm_playback_rewind(struct snd_pcm_substream
*substream
,
2184 snd_pcm_uframes_t frames
)
2186 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2187 snd_pcm_sframes_t appl_ptr
;
2188 snd_pcm_sframes_t ret
;
2189 snd_pcm_sframes_t hw_avail
;
2194 snd_pcm_stream_lock_irq(substream
);
2195 switch (runtime
->status
->state
) {
2196 case SNDRV_PCM_STATE_PREPARED
:
2198 case SNDRV_PCM_STATE_DRAINING
:
2199 case SNDRV_PCM_STATE_RUNNING
:
2200 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2203 case SNDRV_PCM_STATE_XRUN
:
2206 case SNDRV_PCM_STATE_SUSPENDED
:
2214 hw_avail
= snd_pcm_playback_hw_avail(runtime
);
2215 if (hw_avail
<= 0) {
2219 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2221 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2223 appl_ptr
+= runtime
->boundary
;
2224 runtime
->control
->appl_ptr
= appl_ptr
;
2227 snd_pcm_stream_unlock_irq(substream
);
2231 static snd_pcm_sframes_t
snd_pcm_capture_rewind(struct snd_pcm_substream
*substream
,
2232 snd_pcm_uframes_t frames
)
2234 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2235 snd_pcm_sframes_t appl_ptr
;
2236 snd_pcm_sframes_t ret
;
2237 snd_pcm_sframes_t hw_avail
;
2242 snd_pcm_stream_lock_irq(substream
);
2243 switch (runtime
->status
->state
) {
2244 case SNDRV_PCM_STATE_PREPARED
:
2245 case SNDRV_PCM_STATE_DRAINING
:
2247 case SNDRV_PCM_STATE_RUNNING
:
2248 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2251 case SNDRV_PCM_STATE_XRUN
:
2254 case SNDRV_PCM_STATE_SUSPENDED
:
2262 hw_avail
= snd_pcm_capture_hw_avail(runtime
);
2263 if (hw_avail
<= 0) {
2267 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2269 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2271 appl_ptr
+= runtime
->boundary
;
2272 runtime
->control
->appl_ptr
= appl_ptr
;
2275 snd_pcm_stream_unlock_irq(substream
);
2279 static snd_pcm_sframes_t
snd_pcm_playback_forward(struct snd_pcm_substream
*substream
,
2280 snd_pcm_uframes_t frames
)
2282 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2283 snd_pcm_sframes_t appl_ptr
;
2284 snd_pcm_sframes_t ret
;
2285 snd_pcm_sframes_t avail
;
2290 snd_pcm_stream_lock_irq(substream
);
2291 switch (runtime
->status
->state
) {
2292 case SNDRV_PCM_STATE_PREPARED
:
2293 case SNDRV_PCM_STATE_PAUSED
:
2295 case SNDRV_PCM_STATE_DRAINING
:
2296 case SNDRV_PCM_STATE_RUNNING
:
2297 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2300 case SNDRV_PCM_STATE_XRUN
:
2303 case SNDRV_PCM_STATE_SUSPENDED
:
2311 avail
= snd_pcm_playback_avail(runtime
);
2316 if (frames
> (snd_pcm_uframes_t
)avail
)
2318 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2319 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2320 appl_ptr
-= runtime
->boundary
;
2321 runtime
->control
->appl_ptr
= appl_ptr
;
2324 snd_pcm_stream_unlock_irq(substream
);
2328 static snd_pcm_sframes_t
snd_pcm_capture_forward(struct snd_pcm_substream
*substream
,
2329 snd_pcm_uframes_t frames
)
2331 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2332 snd_pcm_sframes_t appl_ptr
;
2333 snd_pcm_sframes_t ret
;
2334 snd_pcm_sframes_t avail
;
2339 snd_pcm_stream_lock_irq(substream
);
2340 switch (runtime
->status
->state
) {
2341 case SNDRV_PCM_STATE_PREPARED
:
2342 case SNDRV_PCM_STATE_DRAINING
:
2343 case SNDRV_PCM_STATE_PAUSED
:
2345 case SNDRV_PCM_STATE_RUNNING
:
2346 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2349 case SNDRV_PCM_STATE_XRUN
:
2352 case SNDRV_PCM_STATE_SUSPENDED
:
2360 avail
= snd_pcm_capture_avail(runtime
);
2365 if (frames
> (snd_pcm_uframes_t
)avail
)
2367 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2368 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2369 appl_ptr
-= runtime
->boundary
;
2370 runtime
->control
->appl_ptr
= appl_ptr
;
2373 snd_pcm_stream_unlock_irq(substream
);
2377 static int snd_pcm_hwsync(struct snd_pcm_substream
*substream
)
2379 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2382 snd_pcm_stream_lock_irq(substream
);
2383 switch (runtime
->status
->state
) {
2384 case SNDRV_PCM_STATE_DRAINING
:
2385 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2387 case SNDRV_PCM_STATE_RUNNING
:
2388 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2391 case SNDRV_PCM_STATE_PREPARED
:
2392 case SNDRV_PCM_STATE_SUSPENDED
:
2395 case SNDRV_PCM_STATE_XRUN
:
2403 snd_pcm_stream_unlock_irq(substream
);
2407 static int snd_pcm_delay(struct snd_pcm_substream
*substream
,
2408 snd_pcm_sframes_t __user
*res
)
2410 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2412 snd_pcm_sframes_t n
= 0;
2414 snd_pcm_stream_lock_irq(substream
);
2415 switch (runtime
->status
->state
) {
2416 case SNDRV_PCM_STATE_DRAINING
:
2417 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2419 case SNDRV_PCM_STATE_RUNNING
:
2420 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2423 case SNDRV_PCM_STATE_PREPARED
:
2424 case SNDRV_PCM_STATE_SUSPENDED
:
2426 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2427 n
= snd_pcm_playback_hw_avail(runtime
);
2429 n
= snd_pcm_capture_avail(runtime
);
2430 n
+= runtime
->delay
;
2432 case SNDRV_PCM_STATE_XRUN
:
2440 snd_pcm_stream_unlock_irq(substream
);
2442 if (put_user(n
, res
))
2447 static int snd_pcm_sync_ptr(struct snd_pcm_substream
*substream
,
2448 struct snd_pcm_sync_ptr __user
*_sync_ptr
)
2450 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2451 struct snd_pcm_sync_ptr sync_ptr
;
2452 volatile struct snd_pcm_mmap_status
*status
;
2453 volatile struct snd_pcm_mmap_control
*control
;
2456 memset(&sync_ptr
, 0, sizeof(sync_ptr
));
2457 if (get_user(sync_ptr
.flags
, (unsigned __user
*)&(_sync_ptr
->flags
)))
2459 if (copy_from_user(&sync_ptr
.c
.control
, &(_sync_ptr
->c
.control
), sizeof(struct snd_pcm_mmap_control
)))
2461 status
= runtime
->status
;
2462 control
= runtime
->control
;
2463 if (sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_HWSYNC
) {
2464 err
= snd_pcm_hwsync(substream
);
2468 snd_pcm_stream_lock_irq(substream
);
2469 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_APPL
))
2470 control
->appl_ptr
= sync_ptr
.c
.control
.appl_ptr
;
2472 sync_ptr
.c
.control
.appl_ptr
= control
->appl_ptr
;
2473 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_AVAIL_MIN
))
2474 control
->avail_min
= sync_ptr
.c
.control
.avail_min
;
2476 sync_ptr
.c
.control
.avail_min
= control
->avail_min
;
2477 sync_ptr
.s
.status
.state
= status
->state
;
2478 sync_ptr
.s
.status
.hw_ptr
= status
->hw_ptr
;
2479 sync_ptr
.s
.status
.tstamp
= status
->tstamp
;
2480 sync_ptr
.s
.status
.suspended_state
= status
->suspended_state
;
2481 snd_pcm_stream_unlock_irq(substream
);
2482 if (copy_to_user(_sync_ptr
, &sync_ptr
, sizeof(sync_ptr
)))
2487 static int snd_pcm_tstamp(struct snd_pcm_substream
*substream
, int __user
*_arg
)
2489 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2492 if (get_user(arg
, _arg
))
2494 if (arg
< 0 || arg
> SNDRV_PCM_TSTAMP_TYPE_LAST
)
2496 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY
;
2497 if (arg
== SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
)
2498 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
;
2502 static int snd_pcm_common_ioctl1(struct file
*file
,
2503 struct snd_pcm_substream
*substream
,
2504 unsigned int cmd
, void __user
*arg
)
2507 case SNDRV_PCM_IOCTL_PVERSION
:
2508 return put_user(SNDRV_PCM_VERSION
, (int __user
*)arg
) ? -EFAULT
: 0;
2509 case SNDRV_PCM_IOCTL_INFO
:
2510 return snd_pcm_info_user(substream
, arg
);
2511 case SNDRV_PCM_IOCTL_TSTAMP
: /* just for compatibility */
2513 case SNDRV_PCM_IOCTL_TTSTAMP
:
2514 return snd_pcm_tstamp(substream
, arg
);
2515 case SNDRV_PCM_IOCTL_HW_REFINE
:
2516 return snd_pcm_hw_refine_user(substream
, arg
);
2517 case SNDRV_PCM_IOCTL_HW_PARAMS
:
2518 return snd_pcm_hw_params_user(substream
, arg
);
2519 case SNDRV_PCM_IOCTL_HW_FREE
:
2520 return snd_pcm_hw_free(substream
);
2521 case SNDRV_PCM_IOCTL_SW_PARAMS
:
2522 return snd_pcm_sw_params_user(substream
, arg
);
2523 case SNDRV_PCM_IOCTL_STATUS
:
2524 return snd_pcm_status_user(substream
, arg
);
2525 case SNDRV_PCM_IOCTL_CHANNEL_INFO
:
2526 return snd_pcm_channel_info_user(substream
, arg
);
2527 case SNDRV_PCM_IOCTL_PREPARE
:
2528 return snd_pcm_prepare(substream
, file
);
2529 case SNDRV_PCM_IOCTL_RESET
:
2530 return snd_pcm_reset(substream
);
2531 case SNDRV_PCM_IOCTL_START
:
2532 return snd_pcm_action_lock_irq(&snd_pcm_action_start
, substream
, SNDRV_PCM_STATE_RUNNING
);
2533 case SNDRV_PCM_IOCTL_LINK
:
2534 return snd_pcm_link(substream
, (int)(unsigned long) arg
);
2535 case SNDRV_PCM_IOCTL_UNLINK
:
2536 return snd_pcm_unlink(substream
);
2537 case SNDRV_PCM_IOCTL_RESUME
:
2538 return snd_pcm_resume(substream
);
2539 case SNDRV_PCM_IOCTL_XRUN
:
2540 return snd_pcm_xrun(substream
);
2541 case SNDRV_PCM_IOCTL_HWSYNC
:
2542 return snd_pcm_hwsync(substream
);
2543 case SNDRV_PCM_IOCTL_DELAY
:
2544 return snd_pcm_delay(substream
, arg
);
2545 case SNDRV_PCM_IOCTL_SYNC_PTR
:
2546 return snd_pcm_sync_ptr(substream
, arg
);
2547 #ifdef CONFIG_SND_SUPPORT_OLD_API
2548 case SNDRV_PCM_IOCTL_HW_REFINE_OLD
:
2549 return snd_pcm_hw_refine_old_user(substream
, arg
);
2550 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD
:
2551 return snd_pcm_hw_params_old_user(substream
, arg
);
2553 case SNDRV_PCM_IOCTL_DRAIN
:
2554 return snd_pcm_drain(substream
, file
);
2555 case SNDRV_PCM_IOCTL_DROP
:
2556 return snd_pcm_drop(substream
);
2557 case SNDRV_PCM_IOCTL_PAUSE
:
2560 snd_pcm_stream_lock_irq(substream
);
2561 res
= snd_pcm_pause(substream
, (int)(unsigned long)arg
);
2562 snd_pcm_stream_unlock_irq(substream
);
2566 snd_printd("unknown ioctl = 0x%x\n", cmd
);
2570 static int snd_pcm_playback_ioctl1(struct file
*file
,
2571 struct snd_pcm_substream
*substream
,
2572 unsigned int cmd
, void __user
*arg
)
2574 if (snd_BUG_ON(!substream
))
2576 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
2579 case SNDRV_PCM_IOCTL_WRITEI_FRAMES
:
2581 struct snd_xferi xferi
;
2582 struct snd_xferi __user
*_xferi
= arg
;
2583 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2584 snd_pcm_sframes_t result
;
2585 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2587 if (put_user(0, &_xferi
->result
))
2589 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2591 result
= snd_pcm_lib_write(substream
, xferi
.buf
, xferi
.frames
);
2592 __put_user(result
, &_xferi
->result
);
2593 return result
< 0 ? result
: 0;
2595 case SNDRV_PCM_IOCTL_WRITEN_FRAMES
:
2597 struct snd_xfern xfern
;
2598 struct snd_xfern __user
*_xfern
= arg
;
2599 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2601 snd_pcm_sframes_t result
;
2602 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2604 if (runtime
->channels
> 128)
2606 if (put_user(0, &_xfern
->result
))
2608 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2611 bufs
= memdup_user(xfern
.bufs
,
2612 sizeof(void *) * runtime
->channels
);
2614 return PTR_ERR(bufs
);
2615 result
= snd_pcm_lib_writev(substream
, bufs
, xfern
.frames
);
2617 __put_user(result
, &_xfern
->result
);
2618 return result
< 0 ? result
: 0;
2620 case SNDRV_PCM_IOCTL_REWIND
:
2622 snd_pcm_uframes_t frames
;
2623 snd_pcm_uframes_t __user
*_frames
= arg
;
2624 snd_pcm_sframes_t result
;
2625 if (get_user(frames
, _frames
))
2627 if (put_user(0, _frames
))
2629 result
= snd_pcm_playback_rewind(substream
, frames
);
2630 __put_user(result
, _frames
);
2631 return result
< 0 ? result
: 0;
2633 case SNDRV_PCM_IOCTL_FORWARD
:
2635 snd_pcm_uframes_t frames
;
2636 snd_pcm_uframes_t __user
*_frames
= arg
;
2637 snd_pcm_sframes_t result
;
2638 if (get_user(frames
, _frames
))
2640 if (put_user(0, _frames
))
2642 result
= snd_pcm_playback_forward(substream
, frames
);
2643 __put_user(result
, _frames
);
2644 return result
< 0 ? result
: 0;
2647 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2650 static int snd_pcm_capture_ioctl1(struct file
*file
,
2651 struct snd_pcm_substream
*substream
,
2652 unsigned int cmd
, void __user
*arg
)
2654 if (snd_BUG_ON(!substream
))
2656 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_CAPTURE
))
2659 case SNDRV_PCM_IOCTL_READI_FRAMES
:
2661 struct snd_xferi xferi
;
2662 struct snd_xferi __user
*_xferi
= arg
;
2663 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2664 snd_pcm_sframes_t result
;
2665 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2667 if (put_user(0, &_xferi
->result
))
2669 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2671 result
= snd_pcm_lib_read(substream
, xferi
.buf
, xferi
.frames
);
2672 __put_user(result
, &_xferi
->result
);
2673 return result
< 0 ? result
: 0;
2675 case SNDRV_PCM_IOCTL_READN_FRAMES
:
2677 struct snd_xfern xfern
;
2678 struct snd_xfern __user
*_xfern
= arg
;
2679 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2681 snd_pcm_sframes_t result
;
2682 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2684 if (runtime
->channels
> 128)
2686 if (put_user(0, &_xfern
->result
))
2688 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2691 bufs
= memdup_user(xfern
.bufs
,
2692 sizeof(void *) * runtime
->channels
);
2694 return PTR_ERR(bufs
);
2695 result
= snd_pcm_lib_readv(substream
, bufs
, xfern
.frames
);
2697 __put_user(result
, &_xfern
->result
);
2698 return result
< 0 ? result
: 0;
2700 case SNDRV_PCM_IOCTL_REWIND
:
2702 snd_pcm_uframes_t frames
;
2703 snd_pcm_uframes_t __user
*_frames
= arg
;
2704 snd_pcm_sframes_t result
;
2705 if (get_user(frames
, _frames
))
2707 if (put_user(0, _frames
))
2709 result
= snd_pcm_capture_rewind(substream
, frames
);
2710 __put_user(result
, _frames
);
2711 return result
< 0 ? result
: 0;
2713 case SNDRV_PCM_IOCTL_FORWARD
:
2715 snd_pcm_uframes_t frames
;
2716 snd_pcm_uframes_t __user
*_frames
= arg
;
2717 snd_pcm_sframes_t result
;
2718 if (get_user(frames
, _frames
))
2720 if (put_user(0, _frames
))
2722 result
= snd_pcm_capture_forward(substream
, frames
);
2723 __put_user(result
, _frames
);
2724 return result
< 0 ? result
: 0;
2727 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2730 static long snd_pcm_playback_ioctl(struct file
*file
, unsigned int cmd
,
2733 struct snd_pcm_file
*pcm_file
;
2735 pcm_file
= file
->private_data
;
2737 if (((cmd
>> 8) & 0xff) != 'A')
2740 return snd_pcm_playback_ioctl1(file
, pcm_file
->substream
, cmd
,
2741 (void __user
*)arg
);
2744 static long snd_pcm_capture_ioctl(struct file
*file
, unsigned int cmd
,
2747 struct snd_pcm_file
*pcm_file
;
2749 pcm_file
= file
->private_data
;
2751 if (((cmd
>> 8) & 0xff) != 'A')
2754 return snd_pcm_capture_ioctl1(file
, pcm_file
->substream
, cmd
,
2755 (void __user
*)arg
);
2758 int snd_pcm_kernel_ioctl(struct snd_pcm_substream
*substream
,
2759 unsigned int cmd
, void *arg
)
2764 fs
= snd_enter_user();
2765 switch (substream
->stream
) {
2766 case SNDRV_PCM_STREAM_PLAYBACK
:
2767 result
= snd_pcm_playback_ioctl1(NULL
, substream
, cmd
,
2768 (void __user
*)arg
);
2770 case SNDRV_PCM_STREAM_CAPTURE
:
2771 result
= snd_pcm_capture_ioctl1(NULL
, substream
, cmd
,
2772 (void __user
*)arg
);
2782 EXPORT_SYMBOL(snd_pcm_kernel_ioctl
);
2784 static ssize_t
snd_pcm_read(struct file
*file
, char __user
*buf
, size_t count
,
2787 struct snd_pcm_file
*pcm_file
;
2788 struct snd_pcm_substream
*substream
;
2789 struct snd_pcm_runtime
*runtime
;
2790 snd_pcm_sframes_t result
;
2792 pcm_file
= file
->private_data
;
2793 substream
= pcm_file
->substream
;
2794 if (PCM_RUNTIME_CHECK(substream
))
2796 runtime
= substream
->runtime
;
2797 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2799 if (!frame_aligned(runtime
, count
))
2801 count
= bytes_to_frames(runtime
, count
);
2802 result
= snd_pcm_lib_read(substream
, buf
, count
);
2804 result
= frames_to_bytes(runtime
, result
);
2808 static ssize_t
snd_pcm_write(struct file
*file
, const char __user
*buf
,
2809 size_t count
, loff_t
* offset
)
2811 struct snd_pcm_file
*pcm_file
;
2812 struct snd_pcm_substream
*substream
;
2813 struct snd_pcm_runtime
*runtime
;
2814 snd_pcm_sframes_t result
;
2816 pcm_file
= file
->private_data
;
2817 substream
= pcm_file
->substream
;
2818 if (PCM_RUNTIME_CHECK(substream
))
2820 runtime
= substream
->runtime
;
2821 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2823 if (!frame_aligned(runtime
, count
))
2825 count
= bytes_to_frames(runtime
, count
);
2826 result
= snd_pcm_lib_write(substream
, buf
, count
);
2828 result
= frames_to_bytes(runtime
, result
);
2832 static ssize_t
snd_pcm_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
2833 unsigned long nr_segs
, loff_t pos
)
2836 struct snd_pcm_file
*pcm_file
;
2837 struct snd_pcm_substream
*substream
;
2838 struct snd_pcm_runtime
*runtime
;
2839 snd_pcm_sframes_t result
;
2842 snd_pcm_uframes_t frames
;
2844 pcm_file
= iocb
->ki_filp
->private_data
;
2845 substream
= pcm_file
->substream
;
2846 if (PCM_RUNTIME_CHECK(substream
))
2848 runtime
= substream
->runtime
;
2849 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2851 if (nr_segs
> 1024 || nr_segs
!= runtime
->channels
)
2853 if (!frame_aligned(runtime
, iov
->iov_len
))
2855 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2856 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2859 for (i
= 0; i
< nr_segs
; ++i
)
2860 bufs
[i
] = iov
[i
].iov_base
;
2861 result
= snd_pcm_lib_readv(substream
, bufs
, frames
);
2863 result
= frames_to_bytes(runtime
, result
);
2868 static ssize_t
snd_pcm_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
2869 unsigned long nr_segs
, loff_t pos
)
2871 struct snd_pcm_file
*pcm_file
;
2872 struct snd_pcm_substream
*substream
;
2873 struct snd_pcm_runtime
*runtime
;
2874 snd_pcm_sframes_t result
;
2877 snd_pcm_uframes_t frames
;
2879 pcm_file
= iocb
->ki_filp
->private_data
;
2880 substream
= pcm_file
->substream
;
2881 if (PCM_RUNTIME_CHECK(substream
))
2883 runtime
= substream
->runtime
;
2884 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2886 if (nr_segs
> 128 || nr_segs
!= runtime
->channels
||
2887 !frame_aligned(runtime
, iov
->iov_len
))
2889 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2890 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2893 for (i
= 0; i
< nr_segs
; ++i
)
2894 bufs
[i
] = iov
[i
].iov_base
;
2895 result
= snd_pcm_lib_writev(substream
, bufs
, frames
);
2897 result
= frames_to_bytes(runtime
, result
);
2902 static unsigned int snd_pcm_playback_poll(struct file
*file
, poll_table
* wait
)
2904 struct snd_pcm_file
*pcm_file
;
2905 struct snd_pcm_substream
*substream
;
2906 struct snd_pcm_runtime
*runtime
;
2908 snd_pcm_uframes_t avail
;
2910 pcm_file
= file
->private_data
;
2912 substream
= pcm_file
->substream
;
2913 if (PCM_RUNTIME_CHECK(substream
))
2915 runtime
= substream
->runtime
;
2917 poll_wait(file
, &runtime
->sleep
, wait
);
2919 snd_pcm_stream_lock_irq(substream
);
2920 avail
= snd_pcm_playback_avail(runtime
);
2921 switch (runtime
->status
->state
) {
2922 case SNDRV_PCM_STATE_RUNNING
:
2923 case SNDRV_PCM_STATE_PREPARED
:
2924 case SNDRV_PCM_STATE_PAUSED
:
2925 if (avail
>= runtime
->control
->avail_min
) {
2926 mask
= POLLOUT
| POLLWRNORM
;
2930 case SNDRV_PCM_STATE_DRAINING
:
2934 mask
= POLLOUT
| POLLWRNORM
| POLLERR
;
2937 snd_pcm_stream_unlock_irq(substream
);
2941 static unsigned int snd_pcm_capture_poll(struct file
*file
, poll_table
* wait
)
2943 struct snd_pcm_file
*pcm_file
;
2944 struct snd_pcm_substream
*substream
;
2945 struct snd_pcm_runtime
*runtime
;
2947 snd_pcm_uframes_t avail
;
2949 pcm_file
= file
->private_data
;
2951 substream
= pcm_file
->substream
;
2952 if (PCM_RUNTIME_CHECK(substream
))
2954 runtime
= substream
->runtime
;
2956 poll_wait(file
, &runtime
->sleep
, wait
);
2958 snd_pcm_stream_lock_irq(substream
);
2959 avail
= snd_pcm_capture_avail(runtime
);
2960 switch (runtime
->status
->state
) {
2961 case SNDRV_PCM_STATE_RUNNING
:
2962 case SNDRV_PCM_STATE_PREPARED
:
2963 case SNDRV_PCM_STATE_PAUSED
:
2964 if (avail
>= runtime
->control
->avail_min
) {
2965 mask
= POLLIN
| POLLRDNORM
;
2970 case SNDRV_PCM_STATE_DRAINING
:
2972 mask
= POLLIN
| POLLRDNORM
;
2977 mask
= POLLIN
| POLLRDNORM
| POLLERR
;
2980 snd_pcm_stream_unlock_irq(substream
);
2989 * Only on coherent architectures, we can mmap the status and the control records
2990 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
2992 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2994 * mmap status record
2996 static int snd_pcm_mmap_status_fault(struct vm_area_struct
*area
,
2997 struct vm_fault
*vmf
)
2999 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3000 struct snd_pcm_runtime
*runtime
;
3002 if (substream
== NULL
)
3003 return VM_FAULT_SIGBUS
;
3004 runtime
= substream
->runtime
;
3005 vmf
->page
= virt_to_page(runtime
->status
);
3006 get_page(vmf
->page
);
3010 static const struct vm_operations_struct snd_pcm_vm_ops_status
=
3012 .fault
= snd_pcm_mmap_status_fault
,
3015 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3016 struct vm_area_struct
*area
)
3018 struct snd_pcm_runtime
*runtime
;
3020 if (!(area
->vm_flags
& VM_READ
))
3022 runtime
= substream
->runtime
;
3023 size
= area
->vm_end
- area
->vm_start
;
3024 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)))
3026 area
->vm_ops
= &snd_pcm_vm_ops_status
;
3027 area
->vm_private_data
= substream
;
3028 area
->vm_flags
|= VM_RESERVED
;
3033 * mmap control record
3035 static int snd_pcm_mmap_control_fault(struct vm_area_struct
*area
,
3036 struct vm_fault
*vmf
)
3038 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3039 struct snd_pcm_runtime
*runtime
;
3041 if (substream
== NULL
)
3042 return VM_FAULT_SIGBUS
;
3043 runtime
= substream
->runtime
;
3044 vmf
->page
= virt_to_page(runtime
->control
);
3045 get_page(vmf
->page
);
3049 static const struct vm_operations_struct snd_pcm_vm_ops_control
=
3051 .fault
= snd_pcm_mmap_control_fault
,
3054 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3055 struct vm_area_struct
*area
)
3057 struct snd_pcm_runtime
*runtime
;
3059 if (!(area
->vm_flags
& VM_READ
))
3061 runtime
= substream
->runtime
;
3062 size
= area
->vm_end
- area
->vm_start
;
3063 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
)))
3065 area
->vm_ops
= &snd_pcm_vm_ops_control
;
3066 area
->vm_private_data
= substream
;
3067 area
->vm_flags
|= VM_RESERVED
;
3070 #else /* ! coherent mmap */
3072 * don't support mmap for status and control records.
3074 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3075 struct vm_area_struct
*area
)
3079 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3080 struct vm_area_struct
*area
)
3084 #endif /* coherent mmap */
3086 static inline struct page
*
3087 snd_pcm_default_page_ops(struct snd_pcm_substream
*substream
, unsigned long ofs
)
3089 void *vaddr
= substream
->runtime
->dma_area
+ ofs
;
3090 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3091 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3092 return virt_to_page(CAC_ADDR(vaddr
));
3094 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3095 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
) {
3096 dma_addr_t addr
= substream
->runtime
->dma_addr
+ ofs
;
3097 addr
-= get_dma_offset(substream
->dma_buffer
.dev
.dev
);
3098 /* assume dma_handle set via pfn_to_phys() in
3099 * mm/dma-noncoherent.c
3101 return pfn_to_page(addr
>> PAGE_SHIFT
);
3104 return virt_to_page(vaddr
);
3108 * fault callback for mmapping a RAM page
3110 static int snd_pcm_mmap_data_fault(struct vm_area_struct
*area
,
3111 struct vm_fault
*vmf
)
3113 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3114 struct snd_pcm_runtime
*runtime
;
3115 unsigned long offset
;
3119 if (substream
== NULL
)
3120 return VM_FAULT_SIGBUS
;
3121 runtime
= substream
->runtime
;
3122 offset
= vmf
->pgoff
<< PAGE_SHIFT
;
3123 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3124 if (offset
> dma_bytes
- PAGE_SIZE
)
3125 return VM_FAULT_SIGBUS
;
3126 if (substream
->ops
->page
)
3127 page
= substream
->ops
->page(substream
, offset
);
3129 page
= snd_pcm_default_page_ops(substream
, offset
);
3131 return VM_FAULT_SIGBUS
;
3137 static const struct vm_operations_struct snd_pcm_vm_ops_data
= {
3138 .open
= snd_pcm_mmap_data_open
,
3139 .close
= snd_pcm_mmap_data_close
,
3142 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault
= {
3143 .open
= snd_pcm_mmap_data_open
,
3144 .close
= snd_pcm_mmap_data_close
,
3145 .fault
= snd_pcm_mmap_data_fault
,
3148 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3149 /* This should be defined / handled globally! */
3151 #define ARCH_HAS_DMA_MMAP_COHERENT
3156 * mmap the DMA buffer on RAM
3158 static int snd_pcm_default_mmap(struct snd_pcm_substream
*substream
,
3159 struct vm_area_struct
*area
)
3161 area
->vm_flags
|= VM_RESERVED
;
3162 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3163 if (!substream
->ops
->page
&&
3164 substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3165 return dma_mmap_coherent(substream
->dma_buffer
.dev
.dev
,
3167 substream
->runtime
->dma_area
,
3168 substream
->runtime
->dma_addr
,
3169 area
->vm_end
- area
->vm_start
);
3170 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3171 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
&&
3172 !plat_device_is_coherent(substream
->dma_buffer
.dev
.dev
))
3173 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3174 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3175 /* mmap with fault handler */
3176 area
->vm_ops
= &snd_pcm_vm_ops_data_fault
;
3181 * mmap the DMA buffer on I/O memory area
3183 #if SNDRV_PCM_INFO_MMAP_IOMEM
3184 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream
*substream
,
3185 struct vm_area_struct
*area
)
3188 unsigned long offset
;
3190 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3191 area
->vm_flags
|= VM_IO
;
3192 size
= area
->vm_end
- area
->vm_start
;
3193 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3194 if (io_remap_pfn_range(area
, area
->vm_start
,
3195 (substream
->runtime
->dma_addr
+ offset
) >> PAGE_SHIFT
,
3196 size
, area
->vm_page_prot
))
3201 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem
);
3202 #endif /* SNDRV_PCM_INFO_MMAP */
3207 int snd_pcm_mmap_data(struct snd_pcm_substream
*substream
, struct file
*file
,
3208 struct vm_area_struct
*area
)
3210 struct snd_pcm_runtime
*runtime
;
3212 unsigned long offset
;
3216 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
3217 if (!(area
->vm_flags
& (VM_WRITE
|VM_READ
)))
3220 if (!(area
->vm_flags
& VM_READ
))
3223 runtime
= substream
->runtime
;
3224 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3226 if (!(runtime
->info
& SNDRV_PCM_INFO_MMAP
))
3228 if (runtime
->access
== SNDRV_PCM_ACCESS_RW_INTERLEAVED
||
3229 runtime
->access
== SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
)
3231 size
= area
->vm_end
- area
->vm_start
;
3232 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3233 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3234 if ((size_t)size
> dma_bytes
)
3236 if (offset
> dma_bytes
- size
)
3239 area
->vm_ops
= &snd_pcm_vm_ops_data
;
3240 area
->vm_private_data
= substream
;
3241 if (substream
->ops
->mmap
)
3242 err
= substream
->ops
->mmap(substream
, area
);
3244 err
= snd_pcm_default_mmap(substream
, area
);
3246 atomic_inc(&substream
->mmap_count
);
3250 EXPORT_SYMBOL(snd_pcm_mmap_data
);
3252 static int snd_pcm_mmap(struct file
*file
, struct vm_area_struct
*area
)
3254 struct snd_pcm_file
* pcm_file
;
3255 struct snd_pcm_substream
*substream
;
3256 unsigned long offset
;
3258 pcm_file
= file
->private_data
;
3259 substream
= pcm_file
->substream
;
3260 if (PCM_RUNTIME_CHECK(substream
))
3263 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3265 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3266 if (pcm_file
->no_compat_mmap
)
3268 return snd_pcm_mmap_status(substream
, file
, area
);
3269 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3270 if (pcm_file
->no_compat_mmap
)
3272 return snd_pcm_mmap_control(substream
, file
, area
);
3274 return snd_pcm_mmap_data(substream
, file
, area
);
3279 static int snd_pcm_fasync(int fd
, struct file
* file
, int on
)
3281 struct snd_pcm_file
* pcm_file
;
3282 struct snd_pcm_substream
*substream
;
3283 struct snd_pcm_runtime
*runtime
;
3285 pcm_file
= file
->private_data
;
3286 substream
= pcm_file
->substream
;
3287 if (PCM_RUNTIME_CHECK(substream
))
3289 runtime
= substream
->runtime
;
3290 return fasync_helper(fd
, file
, on
, &runtime
->fasync
);
3296 #ifdef CONFIG_COMPAT
3297 #include "pcm_compat.c"
3299 #define snd_pcm_ioctl_compat NULL
3303 * To be removed helpers to keep binary compatibility
3306 #ifdef CONFIG_SND_SUPPORT_OLD_API
3307 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3308 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3310 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params
*params
,
3311 struct snd_pcm_hw_params_old
*oparams
)
3315 memset(params
, 0, sizeof(*params
));
3316 params
->flags
= oparams
->flags
;
3317 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3318 params
->masks
[i
].bits
[0] = oparams
->masks
[i
];
3319 memcpy(params
->intervals
, oparams
->intervals
, sizeof(oparams
->intervals
));
3320 params
->rmask
= __OLD_TO_NEW_MASK(oparams
->rmask
);
3321 params
->cmask
= __OLD_TO_NEW_MASK(oparams
->cmask
);
3322 params
->info
= oparams
->info
;
3323 params
->msbits
= oparams
->msbits
;
3324 params
->rate_num
= oparams
->rate_num
;
3325 params
->rate_den
= oparams
->rate_den
;
3326 params
->fifo_size
= oparams
->fifo_size
;
3329 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old
*oparams
,
3330 struct snd_pcm_hw_params
*params
)
3334 memset(oparams
, 0, sizeof(*oparams
));
3335 oparams
->flags
= params
->flags
;
3336 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3337 oparams
->masks
[i
] = params
->masks
[i
].bits
[0];
3338 memcpy(oparams
->intervals
, params
->intervals
, sizeof(oparams
->intervals
));
3339 oparams
->rmask
= __NEW_TO_OLD_MASK(params
->rmask
);
3340 oparams
->cmask
= __NEW_TO_OLD_MASK(params
->cmask
);
3341 oparams
->info
= params
->info
;
3342 oparams
->msbits
= params
->msbits
;
3343 oparams
->rate_num
= params
->rate_num
;
3344 oparams
->rate_den
= params
->rate_den
;
3345 oparams
->fifo_size
= params
->fifo_size
;
3348 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
3349 struct snd_pcm_hw_params_old __user
* _oparams
)
3351 struct snd_pcm_hw_params
*params
;
3352 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3355 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3359 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3360 if (IS_ERR(oparams
)) {
3361 err
= PTR_ERR(oparams
);
3364 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3365 err
= snd_pcm_hw_refine(substream
, params
);
3366 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3367 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3378 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
3379 struct snd_pcm_hw_params_old __user
* _oparams
)
3381 struct snd_pcm_hw_params
*params
;
3382 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3385 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3389 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3390 if (IS_ERR(oparams
)) {
3391 err
= PTR_ERR(oparams
);
3394 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3395 err
= snd_pcm_hw_params(substream
, params
);
3396 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3397 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3407 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3410 static unsigned long snd_pcm_get_unmapped_area(struct file
*file
,
3413 unsigned long pgoff
,
3414 unsigned long flags
)
3416 struct snd_pcm_file
*pcm_file
= file
->private_data
;
3417 struct snd_pcm_substream
*substream
= pcm_file
->substream
;
3418 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
3419 unsigned long offset
= pgoff
<< PAGE_SHIFT
;
3422 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3423 return (unsigned long)runtime
->status
;
3424 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3425 return (unsigned long)runtime
->control
;
3427 return (unsigned long)runtime
->dma_area
+ offset
;
3431 # define snd_pcm_get_unmapped_area NULL
3438 const struct file_operations snd_pcm_f_ops
[2] = {
3440 .owner
= THIS_MODULE
,
3441 .write
= snd_pcm_write
,
3442 .aio_write
= snd_pcm_aio_write
,
3443 .open
= snd_pcm_playback_open
,
3444 .release
= snd_pcm_release
,
3445 .llseek
= no_llseek
,
3446 .poll
= snd_pcm_playback_poll
,
3447 .unlocked_ioctl
= snd_pcm_playback_ioctl
,
3448 .compat_ioctl
= snd_pcm_ioctl_compat
,
3449 .mmap
= snd_pcm_mmap
,
3450 .fasync
= snd_pcm_fasync
,
3451 .get_unmapped_area
= snd_pcm_get_unmapped_area
,
3454 .owner
= THIS_MODULE
,
3455 .read
= snd_pcm_read
,
3456 .aio_read
= snd_pcm_aio_read
,
3457 .open
= snd_pcm_capture_open
,
3458 .release
= snd_pcm_release
,
3459 .llseek
= no_llseek
,
3460 .poll
= snd_pcm_capture_poll
,
3461 .unlocked_ioctl
= snd_pcm_capture_ioctl
,
3462 .compat_ioctl
= snd_pcm_ioctl_compat
,
3463 .mmap
= snd_pcm_mmap
,
3464 .fasync
= snd_pcm_fasync
,
3465 .get_unmapped_area
= snd_pcm_get_unmapped_area
,