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/smp_lock.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos_params.h>
28 #include <linux/uio.h>
29 #include <linux/dma-mapping.h>
30 #include <linux/math64.h>
31 #include <sound/core.h>
32 #include <sound/control.h>
33 #include <sound/info.h>
34 #include <sound/pcm.h>
35 #include <sound/pcm_params.h>
36 #include <sound/timer.h>
37 #include <sound/minors.h>
39 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
40 #include <dma-coherence.h>
47 struct snd_pcm_hw_params_old
{
49 unsigned int masks
[SNDRV_PCM_HW_PARAM_SUBFORMAT
-
50 SNDRV_PCM_HW_PARAM_ACCESS
+ 1];
51 struct snd_interval intervals
[SNDRV_PCM_HW_PARAM_TICK_TIME
-
52 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
+ 1];
57 unsigned int rate_num
;
58 unsigned int rate_den
;
59 snd_pcm_uframes_t fifo_size
;
60 unsigned char reserved
[64];
63 #ifdef CONFIG_SND_SUPPORT_OLD_API
64 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
65 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
67 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
68 struct snd_pcm_hw_params_old __user
* _oparams
);
69 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
70 struct snd_pcm_hw_params_old __user
* _oparams
);
72 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
);
78 DEFINE_RWLOCK(snd_pcm_link_rwlock
);
79 EXPORT_SYMBOL(snd_pcm_link_rwlock
);
81 static DECLARE_RWSEM(snd_pcm_link_rwsem
);
83 static inline mm_segment_t
snd_enter_user(void)
85 mm_segment_t fs
= get_fs();
90 static inline void snd_leave_user(mm_segment_t fs
)
97 int snd_pcm_info(struct snd_pcm_substream
*substream
, struct snd_pcm_info
*info
)
99 struct snd_pcm_runtime
*runtime
;
100 struct snd_pcm
*pcm
= substream
->pcm
;
101 struct snd_pcm_str
*pstr
= substream
->pstr
;
103 memset(info
, 0, sizeof(*info
));
104 info
->card
= pcm
->card
->number
;
105 info
->device
= pcm
->device
;
106 info
->stream
= substream
->stream
;
107 info
->subdevice
= substream
->number
;
108 strlcpy(info
->id
, pcm
->id
, sizeof(info
->id
));
109 strlcpy(info
->name
, pcm
->name
, sizeof(info
->name
));
110 info
->dev_class
= pcm
->dev_class
;
111 info
->dev_subclass
= pcm
->dev_subclass
;
112 info
->subdevices_count
= pstr
->substream_count
;
113 info
->subdevices_avail
= pstr
->substream_count
- pstr
->substream_opened
;
114 strlcpy(info
->subname
, substream
->name
, sizeof(info
->subname
));
115 runtime
= substream
->runtime
;
116 /* AB: FIXME!!! This is definitely nonsense */
118 info
->sync
= runtime
->sync
;
119 substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_INFO
, info
);
124 int snd_pcm_info_user(struct snd_pcm_substream
*substream
,
125 struct snd_pcm_info __user
* _info
)
127 struct snd_pcm_info
*info
;
130 info
= kmalloc(sizeof(*info
), GFP_KERNEL
);
133 err
= snd_pcm_info(substream
, info
);
135 if (copy_to_user(_info
, info
, sizeof(*info
)))
145 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
146 char *snd_pcm_hw_param_names
[] = {
150 HW_PARAM(SAMPLE_BITS
),
151 HW_PARAM(FRAME_BITS
),
154 HW_PARAM(PERIOD_TIME
),
155 HW_PARAM(PERIOD_SIZE
),
156 HW_PARAM(PERIOD_BYTES
),
158 HW_PARAM(BUFFER_TIME
),
159 HW_PARAM(BUFFER_SIZE
),
160 HW_PARAM(BUFFER_BYTES
),
165 int snd_pcm_hw_refine(struct snd_pcm_substream
*substream
,
166 struct snd_pcm_hw_params
*params
)
169 struct snd_pcm_hardware
*hw
;
170 struct snd_interval
*i
= NULL
;
171 struct snd_mask
*m
= NULL
;
172 struct snd_pcm_hw_constraints
*constrs
= &substream
->runtime
->hw_constraints
;
173 unsigned int rstamps
[constrs
->rules_num
];
174 unsigned int vstamps
[SNDRV_PCM_HW_PARAM_LAST_INTERVAL
+ 1];
175 unsigned int stamp
= 2;
179 params
->fifo_size
= 0;
180 if (params
->rmask
& (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS
))
182 if (params
->rmask
& (1 << SNDRV_PCM_HW_PARAM_RATE
)) {
183 params
->rate_num
= 0;
184 params
->rate_den
= 0;
187 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
188 m
= hw_param_mask(params
, k
);
189 if (snd_mask_empty(m
))
191 if (!(params
->rmask
& (1 << k
)))
194 printk(KERN_DEBUG
"%s = ", snd_pcm_hw_param_names
[k
]);
195 printk("%04x%04x%04x%04x -> ", m
->bits
[3], m
->bits
[2], m
->bits
[1], m
->bits
[0]);
197 changed
= snd_mask_refine(m
, constrs_mask(constrs
, k
));
199 printk("%04x%04x%04x%04x\n", m
->bits
[3], m
->bits
[2], m
->bits
[1], m
->bits
[0]);
202 params
->cmask
|= 1 << k
;
207 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
208 i
= hw_param_interval(params
, k
);
209 if (snd_interval_empty(i
))
211 if (!(params
->rmask
& (1 << k
)))
214 printk(KERN_DEBUG
"%s = ", snd_pcm_hw_param_names
[k
]);
219 i
->openmin
? '(' : '[', i
->min
,
220 i
->max
, i
->openmax
? ')' : ']');
223 changed
= snd_interval_refine(i
, constrs_interval(constrs
, k
));
228 printk("%c%u %u%c\n",
229 i
->openmin
? '(' : '[', i
->min
,
230 i
->max
, i
->openmax
? ')' : ']');
233 params
->cmask
|= 1 << k
;
238 for (k
= 0; k
< constrs
->rules_num
; k
++)
240 for (k
= 0; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++)
241 vstamps
[k
] = (params
->rmask
& (1 << k
)) ? 1 : 0;
244 for (k
= 0; k
< constrs
->rules_num
; k
++) {
245 struct snd_pcm_hw_rule
*r
= &constrs
->rules
[k
];
248 if (r
->cond
&& !(r
->cond
& params
->flags
))
250 for (d
= 0; r
->deps
[d
] >= 0; d
++) {
251 if (vstamps
[r
->deps
[d
]] > rstamps
[k
]) {
259 printk(KERN_DEBUG
"Rule %d [%p]: ", k
, r
->func
);
261 printk("%s = ", snd_pcm_hw_param_names
[r
->var
]);
262 if (hw_is_mask(r
->var
)) {
263 m
= hw_param_mask(params
, r
->var
);
264 printk("%x", *m
->bits
);
266 i
= hw_param_interval(params
, r
->var
);
271 i
->openmin
? '(' : '[', i
->min
,
272 i
->max
, i
->openmax
? ')' : ']');
276 changed
= r
->func(params
, r
);
280 if (hw_is_mask(r
->var
))
281 printk("%x", *m
->bits
);
287 i
->openmin
? '(' : '[', i
->min
,
288 i
->max
, i
->openmax
? ')' : ']');
294 if (changed
&& r
->var
>= 0) {
295 params
->cmask
|= (1 << r
->var
);
296 vstamps
[r
->var
] = stamp
;
304 if (!params
->msbits
) {
305 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
);
306 if (snd_interval_single(i
))
307 params
->msbits
= snd_interval_value(i
);
310 if (!params
->rate_den
) {
311 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
312 if (snd_interval_single(i
)) {
313 params
->rate_num
= snd_interval_value(i
);
314 params
->rate_den
= 1;
318 hw
= &substream
->runtime
->hw
;
320 params
->info
= hw
->info
& ~SNDRV_PCM_INFO_FIFO_IN_FRAMES
;
321 if (!params
->fifo_size
) {
322 m
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
323 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
324 if (snd_mask_min(m
) == snd_mask_max(m
) &&
325 snd_interval_min(i
) == snd_interval_max(i
)) {
326 changed
= substream
->ops
->ioctl(substream
,
327 SNDRV_PCM_IOCTL1_FIFO_SIZE
, params
);
336 EXPORT_SYMBOL(snd_pcm_hw_refine
);
338 static int snd_pcm_hw_refine_user(struct snd_pcm_substream
*substream
,
339 struct snd_pcm_hw_params __user
* _params
)
341 struct snd_pcm_hw_params
*params
;
344 params
= memdup_user(_params
, sizeof(*params
));
346 return PTR_ERR(params
);
348 err
= snd_pcm_hw_refine(substream
, params
);
349 if (copy_to_user(_params
, params
, sizeof(*params
))) {
358 static int period_to_usecs(struct snd_pcm_runtime
*runtime
)
363 return -1; /* invalid */
365 /* take 75% of period time as the deadline */
366 usecs
= (750000 / runtime
->rate
) * runtime
->period_size
;
367 usecs
+= ((750000 % runtime
->rate
) * runtime
->period_size
) /
373 static int calc_boundary(struct snd_pcm_runtime
*runtime
)
377 boundary
= (u_int64_t
)runtime
->buffer_size
*
378 (u_int64_t
)runtime
->period_size
;
379 #if BITS_PER_LONG < 64
380 /* try to find lowest common multiple for buffer and period */
381 if (boundary
> LONG_MAX
- runtime
->buffer_size
) {
382 u_int32_t remainder
= -1;
383 u_int32_t divident
= runtime
->buffer_size
;
384 u_int32_t divisor
= runtime
->period_size
;
386 remainder
= divident
% divisor
;
392 boundary
= div_u64(boundary
, divisor
);
393 if (boundary
> LONG_MAX
- runtime
->buffer_size
)
399 runtime
->boundary
= boundary
;
400 while (runtime
->boundary
* 2 <= LONG_MAX
- runtime
->buffer_size
)
401 runtime
->boundary
*= 2;
405 static int snd_pcm_hw_params(struct snd_pcm_substream
*substream
,
406 struct snd_pcm_hw_params
*params
)
408 struct snd_pcm_runtime
*runtime
;
411 snd_pcm_uframes_t frames
;
413 if (PCM_RUNTIME_CHECK(substream
))
415 runtime
= substream
->runtime
;
416 snd_pcm_stream_lock_irq(substream
);
417 switch (runtime
->status
->state
) {
418 case SNDRV_PCM_STATE_OPEN
:
419 case SNDRV_PCM_STATE_SETUP
:
420 case SNDRV_PCM_STATE_PREPARED
:
423 snd_pcm_stream_unlock_irq(substream
);
426 snd_pcm_stream_unlock_irq(substream
);
427 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
428 if (!substream
->oss
.oss
)
430 if (atomic_read(&substream
->mmap_count
))
434 err
= snd_pcm_hw_refine(substream
, params
);
438 err
= snd_pcm_hw_params_choose(substream
, params
);
442 if (substream
->ops
->hw_params
!= NULL
) {
443 err
= substream
->ops
->hw_params(substream
, params
);
448 runtime
->access
= params_access(params
);
449 runtime
->format
= params_format(params
);
450 runtime
->subformat
= params_subformat(params
);
451 runtime
->channels
= params_channels(params
);
452 runtime
->rate
= params_rate(params
);
453 runtime
->period_size
= params_period_size(params
);
454 runtime
->periods
= params_periods(params
);
455 runtime
->buffer_size
= params_buffer_size(params
);
456 runtime
->info
= params
->info
;
457 runtime
->rate_num
= params
->rate_num
;
458 runtime
->rate_den
= params
->rate_den
;
460 bits
= snd_pcm_format_physical_width(runtime
->format
);
461 runtime
->sample_bits
= bits
;
462 bits
*= runtime
->channels
;
463 runtime
->frame_bits
= bits
;
465 while (bits
% 8 != 0) {
469 runtime
->byte_align
= bits
/ 8;
470 runtime
->min_align
= frames
;
472 /* Default sw params */
473 runtime
->tstamp_mode
= SNDRV_PCM_TSTAMP_NONE
;
474 runtime
->period_step
= 1;
475 runtime
->control
->avail_min
= runtime
->period_size
;
476 runtime
->start_threshold
= 1;
477 runtime
->stop_threshold
= runtime
->buffer_size
;
478 runtime
->silence_threshold
= 0;
479 runtime
->silence_size
= 0;
480 err
= calc_boundary(runtime
);
484 snd_pcm_timer_resolution_change(substream
);
485 runtime
->status
->state
= SNDRV_PCM_STATE_SETUP
;
487 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY
,
488 substream
->latency_id
);
489 if ((usecs
= period_to_usecs(runtime
)) >= 0)
490 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY
,
491 substream
->latency_id
, usecs
);
494 /* hardware might be unuseable from this time,
495 so we force application to retry to set
496 the correct hardware parameter settings */
497 runtime
->status
->state
= SNDRV_PCM_STATE_OPEN
;
498 if (substream
->ops
->hw_free
!= NULL
)
499 substream
->ops
->hw_free(substream
);
503 static int snd_pcm_hw_params_user(struct snd_pcm_substream
*substream
,
504 struct snd_pcm_hw_params __user
* _params
)
506 struct snd_pcm_hw_params
*params
;
509 params
= memdup_user(_params
, sizeof(*params
));
511 return PTR_ERR(params
);
513 err
= snd_pcm_hw_params(substream
, params
);
514 if (copy_to_user(_params
, params
, sizeof(*params
))) {
523 static int snd_pcm_hw_free(struct snd_pcm_substream
*substream
)
525 struct snd_pcm_runtime
*runtime
;
528 if (PCM_RUNTIME_CHECK(substream
))
530 runtime
= substream
->runtime
;
531 snd_pcm_stream_lock_irq(substream
);
532 switch (runtime
->status
->state
) {
533 case SNDRV_PCM_STATE_SETUP
:
534 case SNDRV_PCM_STATE_PREPARED
:
537 snd_pcm_stream_unlock_irq(substream
);
540 snd_pcm_stream_unlock_irq(substream
);
541 if (atomic_read(&substream
->mmap_count
))
543 if (substream
->ops
->hw_free
)
544 result
= substream
->ops
->hw_free(substream
);
545 runtime
->status
->state
= SNDRV_PCM_STATE_OPEN
;
546 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY
,
547 substream
->latency_id
);
551 static int snd_pcm_sw_params(struct snd_pcm_substream
*substream
,
552 struct snd_pcm_sw_params
*params
)
554 struct snd_pcm_runtime
*runtime
;
557 if (PCM_RUNTIME_CHECK(substream
))
559 runtime
= substream
->runtime
;
560 snd_pcm_stream_lock_irq(substream
);
561 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
562 snd_pcm_stream_unlock_irq(substream
);
565 snd_pcm_stream_unlock_irq(substream
);
567 if (params
->tstamp_mode
> SNDRV_PCM_TSTAMP_LAST
)
569 if (params
->avail_min
== 0)
571 if (params
->silence_size
>= runtime
->boundary
) {
572 if (params
->silence_threshold
!= 0)
575 if (params
->silence_size
> params
->silence_threshold
)
577 if (params
->silence_threshold
> runtime
->buffer_size
)
581 snd_pcm_stream_lock_irq(substream
);
582 runtime
->tstamp_mode
= params
->tstamp_mode
;
583 runtime
->period_step
= params
->period_step
;
584 runtime
->control
->avail_min
= params
->avail_min
;
585 runtime
->start_threshold
= params
->start_threshold
;
586 runtime
->stop_threshold
= params
->stop_threshold
;
587 runtime
->silence_threshold
= params
->silence_threshold
;
588 runtime
->silence_size
= params
->silence_size
;
589 params
->boundary
= runtime
->boundary
;
590 if (snd_pcm_running(substream
)) {
591 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
592 runtime
->silence_size
> 0)
593 snd_pcm_playback_silence(substream
, ULONG_MAX
);
594 err
= snd_pcm_update_state(substream
, runtime
);
596 snd_pcm_stream_unlock_irq(substream
);
600 static int snd_pcm_sw_params_user(struct snd_pcm_substream
*substream
,
601 struct snd_pcm_sw_params __user
* _params
)
603 struct snd_pcm_sw_params params
;
605 if (copy_from_user(¶ms
, _params
, sizeof(params
)))
607 err
= snd_pcm_sw_params(substream
, ¶ms
);
608 if (copy_to_user(_params
, ¶ms
, sizeof(params
)))
613 int snd_pcm_status(struct snd_pcm_substream
*substream
,
614 struct snd_pcm_status
*status
)
616 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
618 snd_pcm_stream_lock_irq(substream
);
619 status
->state
= runtime
->status
->state
;
620 status
->suspended_state
= runtime
->status
->suspended_state
;
621 if (status
->state
== SNDRV_PCM_STATE_OPEN
)
623 status
->trigger_tstamp
= runtime
->trigger_tstamp
;
624 if (snd_pcm_running(substream
)) {
625 snd_pcm_update_hw_ptr(substream
);
626 if (runtime
->tstamp_mode
== SNDRV_PCM_TSTAMP_ENABLE
) {
627 status
->tstamp
= runtime
->status
->tstamp
;
631 snd_pcm_gettime(runtime
, &status
->tstamp
);
633 status
->appl_ptr
= runtime
->control
->appl_ptr
;
634 status
->hw_ptr
= runtime
->status
->hw_ptr
;
635 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
636 status
->avail
= snd_pcm_playback_avail(runtime
);
637 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
||
638 runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
639 status
->delay
= runtime
->buffer_size
- status
->avail
;
640 status
->delay
+= runtime
->delay
;
644 status
->avail
= snd_pcm_capture_avail(runtime
);
645 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
)
646 status
->delay
= status
->avail
+ runtime
->delay
;
650 status
->avail_max
= runtime
->avail_max
;
651 status
->overrange
= runtime
->overrange
;
652 runtime
->avail_max
= 0;
653 runtime
->overrange
= 0;
655 snd_pcm_stream_unlock_irq(substream
);
659 static int snd_pcm_status_user(struct snd_pcm_substream
*substream
,
660 struct snd_pcm_status __user
* _status
)
662 struct snd_pcm_status status
;
665 memset(&status
, 0, sizeof(status
));
666 res
= snd_pcm_status(substream
, &status
);
669 if (copy_to_user(_status
, &status
, sizeof(status
)))
674 static int snd_pcm_channel_info(struct snd_pcm_substream
*substream
,
675 struct snd_pcm_channel_info
* info
)
677 struct snd_pcm_runtime
*runtime
;
678 unsigned int channel
;
680 channel
= info
->channel
;
681 runtime
= substream
->runtime
;
682 snd_pcm_stream_lock_irq(substream
);
683 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
684 snd_pcm_stream_unlock_irq(substream
);
687 snd_pcm_stream_unlock_irq(substream
);
688 if (channel
>= runtime
->channels
)
690 memset(info
, 0, sizeof(*info
));
691 info
->channel
= channel
;
692 return substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_CHANNEL_INFO
, info
);
695 static int snd_pcm_channel_info_user(struct snd_pcm_substream
*substream
,
696 struct snd_pcm_channel_info __user
* _info
)
698 struct snd_pcm_channel_info info
;
701 if (copy_from_user(&info
, _info
, sizeof(info
)))
703 res
= snd_pcm_channel_info(substream
, &info
);
706 if (copy_to_user(_info
, &info
, sizeof(info
)))
711 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream
*substream
)
713 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
714 if (runtime
->trigger_master
== NULL
)
716 if (runtime
->trigger_master
== substream
) {
717 snd_pcm_gettime(runtime
, &runtime
->trigger_tstamp
);
719 snd_pcm_trigger_tstamp(runtime
->trigger_master
);
720 runtime
->trigger_tstamp
= runtime
->trigger_master
->runtime
->trigger_tstamp
;
722 runtime
->trigger_master
= NULL
;
726 int (*pre_action
)(struct snd_pcm_substream
*substream
, int state
);
727 int (*do_action
)(struct snd_pcm_substream
*substream
, int state
);
728 void (*undo_action
)(struct snd_pcm_substream
*substream
, int state
);
729 void (*post_action
)(struct snd_pcm_substream
*substream
, int state
);
733 * this functions is core for handling of linked stream
734 * Note: the stream state might be changed also on failure
735 * Note2: call with calling stream lock + link lock
737 static int snd_pcm_action_group(struct action_ops
*ops
,
738 struct snd_pcm_substream
*substream
,
739 int state
, int do_lock
)
741 struct snd_pcm_substream
*s
= NULL
;
742 struct snd_pcm_substream
*s1
;
745 snd_pcm_group_for_each_entry(s
, substream
) {
746 if (do_lock
&& s
!= substream
)
747 spin_lock_nested(&s
->self_group
.lock
,
748 SINGLE_DEPTH_NESTING
);
749 res
= ops
->pre_action(s
, state
);
753 snd_pcm_group_for_each_entry(s
, substream
) {
754 res
= ops
->do_action(s
, state
);
756 if (ops
->undo_action
) {
757 snd_pcm_group_for_each_entry(s1
, substream
) {
758 if (s1
== s
) /* failed stream */
760 ops
->undo_action(s1
, state
);
763 s
= NULL
; /* unlock all */
767 snd_pcm_group_for_each_entry(s
, substream
) {
768 ops
->post_action(s
, state
);
773 snd_pcm_group_for_each_entry(s1
, substream
) {
775 spin_unlock(&s1
->self_group
.lock
);
776 if (s1
== s
) /* end */
784 * Note: call with stream lock
786 static int snd_pcm_action_single(struct action_ops
*ops
,
787 struct snd_pcm_substream
*substream
,
792 res
= ops
->pre_action(substream
, state
);
795 res
= ops
->do_action(substream
, state
);
797 ops
->post_action(substream
, state
);
798 else if (ops
->undo_action
)
799 ops
->undo_action(substream
, state
);
804 * Note: call with stream lock
806 static int snd_pcm_action(struct action_ops
*ops
,
807 struct snd_pcm_substream
*substream
,
812 if (snd_pcm_stream_linked(substream
)) {
813 if (!spin_trylock(&substream
->group
->lock
)) {
814 spin_unlock(&substream
->self_group
.lock
);
815 spin_lock(&substream
->group
->lock
);
816 spin_lock(&substream
->self_group
.lock
);
818 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
819 spin_unlock(&substream
->group
->lock
);
821 res
= snd_pcm_action_single(ops
, substream
, state
);
827 * Note: don't use any locks before
829 static int snd_pcm_action_lock_irq(struct action_ops
*ops
,
830 struct snd_pcm_substream
*substream
,
835 read_lock_irq(&snd_pcm_link_rwlock
);
836 if (snd_pcm_stream_linked(substream
)) {
837 spin_lock(&substream
->group
->lock
);
838 spin_lock(&substream
->self_group
.lock
);
839 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
840 spin_unlock(&substream
->self_group
.lock
);
841 spin_unlock(&substream
->group
->lock
);
843 spin_lock(&substream
->self_group
.lock
);
844 res
= snd_pcm_action_single(ops
, substream
, state
);
845 spin_unlock(&substream
->self_group
.lock
);
847 read_unlock_irq(&snd_pcm_link_rwlock
);
853 static int snd_pcm_action_nonatomic(struct action_ops
*ops
,
854 struct snd_pcm_substream
*substream
,
859 down_read(&snd_pcm_link_rwsem
);
860 if (snd_pcm_stream_linked(substream
))
861 res
= snd_pcm_action_group(ops
, substream
, state
, 0);
863 res
= snd_pcm_action_single(ops
, substream
, state
);
864 up_read(&snd_pcm_link_rwsem
);
871 static int snd_pcm_pre_start(struct snd_pcm_substream
*substream
, int state
)
873 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
874 if (runtime
->status
->state
!= SNDRV_PCM_STATE_PREPARED
)
876 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
877 !snd_pcm_playback_data(substream
))
879 runtime
->trigger_master
= substream
;
883 static int snd_pcm_do_start(struct snd_pcm_substream
*substream
, int state
)
885 if (substream
->runtime
->trigger_master
!= substream
)
887 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_START
);
890 static void snd_pcm_undo_start(struct snd_pcm_substream
*substream
, int state
)
892 if (substream
->runtime
->trigger_master
== substream
)
893 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
896 static void snd_pcm_post_start(struct snd_pcm_substream
*substream
, int state
)
898 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
899 snd_pcm_trigger_tstamp(substream
);
900 runtime
->hw_ptr_jiffies
= jiffies
;
901 runtime
->status
->state
= state
;
902 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
903 runtime
->silence_size
> 0)
904 snd_pcm_playback_silence(substream
, ULONG_MAX
);
905 if (substream
->timer
)
906 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTART
,
907 &runtime
->trigger_tstamp
);
910 static struct action_ops snd_pcm_action_start
= {
911 .pre_action
= snd_pcm_pre_start
,
912 .do_action
= snd_pcm_do_start
,
913 .undo_action
= snd_pcm_undo_start
,
914 .post_action
= snd_pcm_post_start
918 * snd_pcm_start - start all linked streams
919 * @substream: the PCM substream instance
921 int snd_pcm_start(struct snd_pcm_substream
*substream
)
923 return snd_pcm_action(&snd_pcm_action_start
, substream
,
924 SNDRV_PCM_STATE_RUNNING
);
930 static int snd_pcm_pre_stop(struct snd_pcm_substream
*substream
, int state
)
932 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
933 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
935 runtime
->trigger_master
= substream
;
939 static int snd_pcm_do_stop(struct snd_pcm_substream
*substream
, int state
)
941 if (substream
->runtime
->trigger_master
== substream
&&
942 snd_pcm_running(substream
))
943 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
944 return 0; /* unconditonally stop all substreams */
947 static void snd_pcm_post_stop(struct snd_pcm_substream
*substream
, int state
)
949 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
950 if (runtime
->status
->state
!= state
) {
951 snd_pcm_trigger_tstamp(substream
);
952 if (substream
->timer
)
953 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTOP
,
954 &runtime
->trigger_tstamp
);
955 runtime
->status
->state
= state
;
957 wake_up(&runtime
->sleep
);
958 wake_up(&runtime
->tsleep
);
961 static struct action_ops snd_pcm_action_stop
= {
962 .pre_action
= snd_pcm_pre_stop
,
963 .do_action
= snd_pcm_do_stop
,
964 .post_action
= snd_pcm_post_stop
968 * snd_pcm_stop - try to stop all running streams in the substream group
969 * @substream: the PCM substream instance
970 * @state: PCM state after stopping the stream
972 * The state of each stream is then changed to the given state unconditionally.
974 int snd_pcm_stop(struct snd_pcm_substream
*substream
, int state
)
976 return snd_pcm_action(&snd_pcm_action_stop
, substream
, state
);
979 EXPORT_SYMBOL(snd_pcm_stop
);
982 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
983 * @substream: the PCM substream
985 * After stopping, the state is changed to SETUP.
986 * Unlike snd_pcm_stop(), this affects only the given stream.
988 int snd_pcm_drain_done(struct snd_pcm_substream
*substream
)
990 return snd_pcm_action_single(&snd_pcm_action_stop
, substream
,
991 SNDRV_PCM_STATE_SETUP
);
997 static int snd_pcm_pre_pause(struct snd_pcm_substream
*substream
, int push
)
999 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1000 if (!(runtime
->info
& SNDRV_PCM_INFO_PAUSE
))
1003 if (runtime
->status
->state
!= SNDRV_PCM_STATE_RUNNING
)
1005 } else if (runtime
->status
->state
!= SNDRV_PCM_STATE_PAUSED
)
1007 runtime
->trigger_master
= substream
;
1011 static int snd_pcm_do_pause(struct snd_pcm_substream
*substream
, int push
)
1013 if (substream
->runtime
->trigger_master
!= substream
)
1015 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1016 * a delta betwen the current jiffies, this gives a large enough
1017 * delta, effectively to skip the check once.
1019 substream
->runtime
->hw_ptr_jiffies
= jiffies
- HZ
* 1000;
1020 return substream
->ops
->trigger(substream
,
1021 push
? SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
1022 SNDRV_PCM_TRIGGER_PAUSE_RELEASE
);
1025 static void snd_pcm_undo_pause(struct snd_pcm_substream
*substream
, int push
)
1027 if (substream
->runtime
->trigger_master
== substream
)
1028 substream
->ops
->trigger(substream
,
1029 push
? SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1030 SNDRV_PCM_TRIGGER_PAUSE_PUSH
);
1033 static void snd_pcm_post_pause(struct snd_pcm_substream
*substream
, int push
)
1035 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1036 snd_pcm_trigger_tstamp(substream
);
1038 runtime
->status
->state
= SNDRV_PCM_STATE_PAUSED
;
1039 if (substream
->timer
)
1040 snd_timer_notify(substream
->timer
,
1041 SNDRV_TIMER_EVENT_MPAUSE
,
1042 &runtime
->trigger_tstamp
);
1043 wake_up(&runtime
->sleep
);
1044 wake_up(&runtime
->tsleep
);
1046 runtime
->status
->state
= SNDRV_PCM_STATE_RUNNING
;
1047 if (substream
->timer
)
1048 snd_timer_notify(substream
->timer
,
1049 SNDRV_TIMER_EVENT_MCONTINUE
,
1050 &runtime
->trigger_tstamp
);
1054 static struct action_ops snd_pcm_action_pause
= {
1055 .pre_action
= snd_pcm_pre_pause
,
1056 .do_action
= snd_pcm_do_pause
,
1057 .undo_action
= snd_pcm_undo_pause
,
1058 .post_action
= snd_pcm_post_pause
1062 * Push/release the pause for all linked streams.
1064 static int snd_pcm_pause(struct snd_pcm_substream
*substream
, int push
)
1066 return snd_pcm_action(&snd_pcm_action_pause
, substream
, push
);
1072 static int snd_pcm_pre_suspend(struct snd_pcm_substream
*substream
, int state
)
1074 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1075 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1077 runtime
->trigger_master
= substream
;
1081 static int snd_pcm_do_suspend(struct snd_pcm_substream
*substream
, int state
)
1083 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1084 if (runtime
->trigger_master
!= substream
)
1086 if (! snd_pcm_running(substream
))
1088 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1089 return 0; /* suspend unconditionally */
1092 static void snd_pcm_post_suspend(struct snd_pcm_substream
*substream
, int state
)
1094 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1095 snd_pcm_trigger_tstamp(substream
);
1096 if (substream
->timer
)
1097 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSUSPEND
,
1098 &runtime
->trigger_tstamp
);
1099 runtime
->status
->suspended_state
= runtime
->status
->state
;
1100 runtime
->status
->state
= SNDRV_PCM_STATE_SUSPENDED
;
1101 wake_up(&runtime
->sleep
);
1102 wake_up(&runtime
->tsleep
);
1105 static struct action_ops snd_pcm_action_suspend
= {
1106 .pre_action
= snd_pcm_pre_suspend
,
1107 .do_action
= snd_pcm_do_suspend
,
1108 .post_action
= snd_pcm_post_suspend
1112 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1113 * @substream: the PCM substream
1115 * After this call, all streams are changed to SUSPENDED state.
1117 int snd_pcm_suspend(struct snd_pcm_substream
*substream
)
1120 unsigned long flags
;
1125 snd_pcm_stream_lock_irqsave(substream
, flags
);
1126 err
= snd_pcm_action(&snd_pcm_action_suspend
, substream
, 0);
1127 snd_pcm_stream_unlock_irqrestore(substream
, flags
);
1131 EXPORT_SYMBOL(snd_pcm_suspend
);
1134 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1135 * @pcm: the PCM instance
1137 * After this call, all streams are changed to SUSPENDED state.
1139 int snd_pcm_suspend_all(struct snd_pcm
*pcm
)
1141 struct snd_pcm_substream
*substream
;
1142 int stream
, err
= 0;
1147 for (stream
= 0; stream
< 2; stream
++) {
1148 for (substream
= pcm
->streams
[stream
].substream
;
1149 substream
; substream
= substream
->next
) {
1150 /* FIXME: the open/close code should lock this as well */
1151 if (substream
->runtime
== NULL
)
1153 err
= snd_pcm_suspend(substream
);
1154 if (err
< 0 && err
!= -EBUSY
)
1161 EXPORT_SYMBOL(snd_pcm_suspend_all
);
1165 static int snd_pcm_pre_resume(struct snd_pcm_substream
*substream
, int state
)
1167 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1168 if (!(runtime
->info
& SNDRV_PCM_INFO_RESUME
))
1170 runtime
->trigger_master
= substream
;
1174 static int snd_pcm_do_resume(struct snd_pcm_substream
*substream
, int state
)
1176 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1177 if (runtime
->trigger_master
!= substream
)
1179 /* DMA not running previously? */
1180 if (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_RUNNING
&&
1181 (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_DRAINING
||
1182 substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
1184 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_RESUME
);
1187 static void snd_pcm_undo_resume(struct snd_pcm_substream
*substream
, int state
)
1189 if (substream
->runtime
->trigger_master
== substream
&&
1190 snd_pcm_running(substream
))
1191 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1194 static void snd_pcm_post_resume(struct snd_pcm_substream
*substream
, int state
)
1196 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1197 snd_pcm_trigger_tstamp(substream
);
1198 if (substream
->timer
)
1199 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MRESUME
,
1200 &runtime
->trigger_tstamp
);
1201 runtime
->status
->state
= runtime
->status
->suspended_state
;
1204 static struct action_ops snd_pcm_action_resume
= {
1205 .pre_action
= snd_pcm_pre_resume
,
1206 .do_action
= snd_pcm_do_resume
,
1207 .undo_action
= snd_pcm_undo_resume
,
1208 .post_action
= snd_pcm_post_resume
1211 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1213 struct snd_card
*card
= substream
->pcm
->card
;
1216 snd_power_lock(card
);
1217 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1218 res
= snd_pcm_action_lock_irq(&snd_pcm_action_resume
, substream
, 0);
1219 snd_power_unlock(card
);
1225 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1230 #endif /* CONFIG_PM */
1235 * Change the RUNNING stream(s) to XRUN state.
1237 static int snd_pcm_xrun(struct snd_pcm_substream
*substream
)
1239 struct snd_card
*card
= substream
->pcm
->card
;
1240 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1243 snd_power_lock(card
);
1244 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1245 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1250 snd_pcm_stream_lock_irq(substream
);
1251 switch (runtime
->status
->state
) {
1252 case SNDRV_PCM_STATE_XRUN
:
1253 result
= 0; /* already there */
1255 case SNDRV_PCM_STATE_RUNNING
:
1256 result
= snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
1261 snd_pcm_stream_unlock_irq(substream
);
1263 snd_power_unlock(card
);
1270 static int snd_pcm_pre_reset(struct snd_pcm_substream
*substream
, int state
)
1272 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1273 switch (runtime
->status
->state
) {
1274 case SNDRV_PCM_STATE_RUNNING
:
1275 case SNDRV_PCM_STATE_PREPARED
:
1276 case SNDRV_PCM_STATE_PAUSED
:
1277 case SNDRV_PCM_STATE_SUSPENDED
:
1284 static int snd_pcm_do_reset(struct snd_pcm_substream
*substream
, int state
)
1286 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1287 int err
= substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_RESET
, NULL
);
1290 runtime
->hw_ptr_base
= 0;
1291 runtime
->hw_ptr_interrupt
= runtime
->status
->hw_ptr
-
1292 runtime
->status
->hw_ptr
% runtime
->period_size
;
1293 runtime
->silence_start
= runtime
->status
->hw_ptr
;
1294 runtime
->silence_filled
= 0;
1298 static void snd_pcm_post_reset(struct snd_pcm_substream
*substream
, int state
)
1300 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1301 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1302 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
1303 runtime
->silence_size
> 0)
1304 snd_pcm_playback_silence(substream
, ULONG_MAX
);
1307 static struct action_ops snd_pcm_action_reset
= {
1308 .pre_action
= snd_pcm_pre_reset
,
1309 .do_action
= snd_pcm_do_reset
,
1310 .post_action
= snd_pcm_post_reset
1313 static int snd_pcm_reset(struct snd_pcm_substream
*substream
)
1315 return snd_pcm_action_nonatomic(&snd_pcm_action_reset
, substream
, 0);
1321 /* we use the second argument for updating f_flags */
1322 static int snd_pcm_pre_prepare(struct snd_pcm_substream
*substream
,
1325 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1326 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1327 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
)
1329 if (snd_pcm_running(substream
))
1331 substream
->f_flags
= f_flags
;
1335 static int snd_pcm_do_prepare(struct snd_pcm_substream
*substream
, int state
)
1338 err
= substream
->ops
->prepare(substream
);
1341 return snd_pcm_do_reset(substream
, 0);
1344 static void snd_pcm_post_prepare(struct snd_pcm_substream
*substream
, int state
)
1346 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1347 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1348 runtime
->status
->state
= SNDRV_PCM_STATE_PREPARED
;
1351 static struct action_ops snd_pcm_action_prepare
= {
1352 .pre_action
= snd_pcm_pre_prepare
,
1353 .do_action
= snd_pcm_do_prepare
,
1354 .post_action
= snd_pcm_post_prepare
1358 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1359 * @substream: the PCM substream instance
1360 * @file: file to refer f_flags
1362 static int snd_pcm_prepare(struct snd_pcm_substream
*substream
,
1366 struct snd_card
*card
= substream
->pcm
->card
;
1370 f_flags
= file
->f_flags
;
1372 f_flags
= substream
->f_flags
;
1374 snd_power_lock(card
);
1375 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1376 res
= snd_pcm_action_nonatomic(&snd_pcm_action_prepare
,
1377 substream
, f_flags
);
1378 snd_power_unlock(card
);
1386 static int snd_pcm_pre_drain_init(struct snd_pcm_substream
*substream
, int state
)
1388 substream
->runtime
->trigger_master
= substream
;
1392 static int snd_pcm_do_drain_init(struct snd_pcm_substream
*substream
, int state
)
1394 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1395 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
1396 switch (runtime
->status
->state
) {
1397 case SNDRV_PCM_STATE_PREPARED
:
1398 /* start playback stream if possible */
1399 if (! snd_pcm_playback_empty(substream
)) {
1400 snd_pcm_do_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1401 snd_pcm_post_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1404 case SNDRV_PCM_STATE_RUNNING
:
1405 runtime
->status
->state
= SNDRV_PCM_STATE_DRAINING
;
1411 /* stop running stream */
1412 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
) {
1413 int new_state
= snd_pcm_capture_avail(runtime
) > 0 ?
1414 SNDRV_PCM_STATE_DRAINING
: SNDRV_PCM_STATE_SETUP
;
1415 snd_pcm_do_stop(substream
, new_state
);
1416 snd_pcm_post_stop(substream
, new_state
);
1422 static void snd_pcm_post_drain_init(struct snd_pcm_substream
*substream
, int state
)
1426 static struct action_ops snd_pcm_action_drain_init
= {
1427 .pre_action
= snd_pcm_pre_drain_init
,
1428 .do_action
= snd_pcm_do_drain_init
,
1429 .post_action
= snd_pcm_post_drain_init
1432 static int snd_pcm_drop(struct snd_pcm_substream
*substream
);
1435 * Drain the stream(s).
1436 * When the substream is linked, sync until the draining of all playback streams
1438 * After this call, all streams are supposed to be either SETUP or DRAINING
1439 * (capture only) state.
1441 static int snd_pcm_drain(struct snd_pcm_substream
*substream
,
1444 struct snd_card
*card
;
1445 struct snd_pcm_runtime
*runtime
;
1446 struct snd_pcm_substream
*s
;
1451 card
= substream
->pcm
->card
;
1452 runtime
= substream
->runtime
;
1454 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1457 snd_power_lock(card
);
1458 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1459 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1461 snd_power_unlock(card
);
1467 if (file
->f_flags
& O_NONBLOCK
)
1469 } else if (substream
->f_flags
& O_NONBLOCK
)
1472 down_read(&snd_pcm_link_rwsem
);
1473 snd_pcm_stream_lock_irq(substream
);
1475 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1476 snd_pcm_pause(substream
, 0);
1478 /* pre-start/stop - all running streams are changed to DRAINING state */
1479 result
= snd_pcm_action(&snd_pcm_action_drain_init
, substream
, 0);
1482 /* in non-blocking, we don't wait in ioctl but let caller poll */
1490 struct snd_pcm_runtime
*to_check
;
1491 if (signal_pending(current
)) {
1492 result
= -ERESTARTSYS
;
1495 /* find a substream to drain */
1497 snd_pcm_group_for_each_entry(s
, substream
) {
1498 if (s
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
)
1500 runtime
= s
->runtime
;
1501 if (runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
1507 break; /* all drained */
1508 init_waitqueue_entry(&wait
, current
);
1509 add_wait_queue(&to_check
->sleep
, &wait
);
1510 set_current_state(TASK_INTERRUPTIBLE
);
1511 snd_pcm_stream_unlock_irq(substream
);
1512 up_read(&snd_pcm_link_rwsem
);
1513 snd_power_unlock(card
);
1514 tout
= schedule_timeout(10 * HZ
);
1515 snd_power_lock(card
);
1516 down_read(&snd_pcm_link_rwsem
);
1517 snd_pcm_stream_lock_irq(substream
);
1518 remove_wait_queue(&to_check
->sleep
, &wait
);
1520 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1523 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1524 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1532 snd_pcm_stream_unlock_irq(substream
);
1533 up_read(&snd_pcm_link_rwsem
);
1534 snd_power_unlock(card
);
1542 * Immediately put all linked substreams into SETUP state.
1544 static int snd_pcm_drop(struct snd_pcm_substream
*substream
)
1546 struct snd_pcm_runtime
*runtime
;
1547 struct snd_card
*card
;
1550 if (PCM_RUNTIME_CHECK(substream
))
1552 runtime
= substream
->runtime
;
1553 card
= substream
->pcm
->card
;
1555 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1556 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
||
1557 runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1560 snd_pcm_stream_lock_irq(substream
);
1562 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1563 snd_pcm_pause(substream
, 0);
1565 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1566 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1567 snd_pcm_stream_unlock_irq(substream
);
1573 /* WARNING: Don't forget to fput back the file */
1574 static struct file
*snd_pcm_file_fd(int fd
)
1577 struct inode
*inode
;
1583 inode
= file
->f_path
.dentry
->d_inode
;
1584 if (!S_ISCHR(inode
->i_mode
) ||
1585 imajor(inode
) != snd_major
) {
1589 minor
= iminor(inode
);
1590 if (!snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_PLAYBACK
) &&
1591 !snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_CAPTURE
)) {
1601 static int snd_pcm_link(struct snd_pcm_substream
*substream
, int fd
)
1605 struct snd_pcm_file
*pcm_file
;
1606 struct snd_pcm_substream
*substream1
;
1608 file
= snd_pcm_file_fd(fd
);
1611 pcm_file
= file
->private_data
;
1612 substream1
= pcm_file
->substream
;
1613 down_write(&snd_pcm_link_rwsem
);
1614 write_lock_irq(&snd_pcm_link_rwlock
);
1615 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1616 substream
->runtime
->status
->state
!= substream1
->runtime
->status
->state
) {
1620 if (snd_pcm_stream_linked(substream1
)) {
1624 if (!snd_pcm_stream_linked(substream
)) {
1625 substream
->group
= kmalloc(sizeof(struct snd_pcm_group
), GFP_ATOMIC
);
1626 if (substream
->group
== NULL
) {
1630 spin_lock_init(&substream
->group
->lock
);
1631 INIT_LIST_HEAD(&substream
->group
->substreams
);
1632 list_add_tail(&substream
->link_list
, &substream
->group
->substreams
);
1633 substream
->group
->count
= 1;
1635 list_add_tail(&substream1
->link_list
, &substream
->group
->substreams
);
1636 substream
->group
->count
++;
1637 substream1
->group
= substream
->group
;
1639 write_unlock_irq(&snd_pcm_link_rwlock
);
1640 up_write(&snd_pcm_link_rwsem
);
1645 static void relink_to_local(struct snd_pcm_substream
*substream
)
1647 substream
->group
= &substream
->self_group
;
1648 INIT_LIST_HEAD(&substream
->self_group
.substreams
);
1649 list_add_tail(&substream
->link_list
, &substream
->self_group
.substreams
);
1652 static int snd_pcm_unlink(struct snd_pcm_substream
*substream
)
1654 struct snd_pcm_substream
*s
;
1657 down_write(&snd_pcm_link_rwsem
);
1658 write_lock_irq(&snd_pcm_link_rwlock
);
1659 if (!snd_pcm_stream_linked(substream
)) {
1663 list_del(&substream
->link_list
);
1664 substream
->group
->count
--;
1665 if (substream
->group
->count
== 1) { /* detach the last stream, too */
1666 snd_pcm_group_for_each_entry(s
, substream
) {
1670 kfree(substream
->group
);
1672 relink_to_local(substream
);
1674 write_unlock_irq(&snd_pcm_link_rwlock
);
1675 up_write(&snd_pcm_link_rwsem
);
1682 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params
*params
,
1683 struct snd_pcm_hw_rule
*rule
)
1685 struct snd_interval t
;
1686 snd_interval_mul(hw_param_interval_c(params
, rule
->deps
[0]),
1687 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1688 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1691 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params
*params
,
1692 struct snd_pcm_hw_rule
*rule
)
1694 struct snd_interval t
;
1695 snd_interval_div(hw_param_interval_c(params
, rule
->deps
[0]),
1696 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1697 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1700 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params
*params
,
1701 struct snd_pcm_hw_rule
*rule
)
1703 struct snd_interval t
;
1704 snd_interval_muldivk(hw_param_interval_c(params
, rule
->deps
[0]),
1705 hw_param_interval_c(params
, rule
->deps
[1]),
1706 (unsigned long) rule
->private, &t
);
1707 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1710 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params
*params
,
1711 struct snd_pcm_hw_rule
*rule
)
1713 struct snd_interval t
;
1714 snd_interval_mulkdiv(hw_param_interval_c(params
, rule
->deps
[0]),
1715 (unsigned long) rule
->private,
1716 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1717 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1720 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params
*params
,
1721 struct snd_pcm_hw_rule
*rule
)
1724 struct snd_interval
*i
= hw_param_interval(params
, rule
->deps
[0]);
1726 struct snd_mask
*mask
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1728 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1730 if (! snd_mask_test(mask
, k
))
1732 bits
= snd_pcm_format_physical_width(k
);
1734 continue; /* ignore invalid formats */
1735 if ((unsigned)bits
< i
->min
|| (unsigned)bits
> i
->max
)
1736 snd_mask_reset(&m
, k
);
1738 return snd_mask_refine(mask
, &m
);
1741 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params
*params
,
1742 struct snd_pcm_hw_rule
*rule
)
1744 struct snd_interval t
;
1750 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1752 if (! snd_mask_test(hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
), k
))
1754 bits
= snd_pcm_format_physical_width(k
);
1756 continue; /* ignore invalid formats */
1757 if (t
.min
> (unsigned)bits
)
1759 if (t
.max
< (unsigned)bits
)
1763 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1766 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1767 #error "Change this table"
1770 static unsigned int rates
[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1771 48000, 64000, 88200, 96000, 176400, 192000 };
1773 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates
= {
1774 .count
= ARRAY_SIZE(rates
),
1778 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params
*params
,
1779 struct snd_pcm_hw_rule
*rule
)
1781 struct snd_pcm_hardware
*hw
= rule
->private;
1782 return snd_interval_list(hw_param_interval(params
, rule
->var
),
1783 snd_pcm_known_rates
.count
,
1784 snd_pcm_known_rates
.list
, hw
->rates
);
1787 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params
*params
,
1788 struct snd_pcm_hw_rule
*rule
)
1790 struct snd_interval t
;
1791 struct snd_pcm_substream
*substream
= rule
->private;
1793 t
.max
= substream
->buffer_bytes_max
;
1797 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1800 int snd_pcm_hw_constraints_init(struct snd_pcm_substream
*substream
)
1802 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1803 struct snd_pcm_hw_constraints
*constrs
= &runtime
->hw_constraints
;
1806 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
1807 snd_mask_any(constrs_mask(constrs
, k
));
1810 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
1811 snd_interval_any(constrs_interval(constrs
, k
));
1814 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_CHANNELS
));
1815 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
));
1816 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
));
1817 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
));
1818 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_FRAME_BITS
));
1820 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1821 snd_pcm_hw_rule_format
, NULL
,
1822 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1825 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1826 snd_pcm_hw_rule_sample_bits
, NULL
,
1827 SNDRV_PCM_HW_PARAM_FORMAT
,
1828 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1831 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1832 snd_pcm_hw_rule_div
, NULL
,
1833 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1836 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1837 snd_pcm_hw_rule_mul
, NULL
,
1838 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1841 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1842 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1843 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1846 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1847 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1848 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, -1);
1851 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
1852 snd_pcm_hw_rule_div
, NULL
,
1853 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1856 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1857 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1858 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
, -1);
1861 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1862 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1863 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_BUFFER_TIME
, -1);
1866 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIODS
,
1867 snd_pcm_hw_rule_div
, NULL
,
1868 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1871 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1872 snd_pcm_hw_rule_div
, NULL
,
1873 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1876 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1877 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1878 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1881 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1882 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1883 SNDRV_PCM_HW_PARAM_PERIOD_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1886 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1887 snd_pcm_hw_rule_mul
, NULL
,
1888 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1891 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1892 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1893 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1896 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1897 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1898 SNDRV_PCM_HW_PARAM_BUFFER_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1901 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1902 snd_pcm_hw_rule_muldivk
, (void*) 8,
1903 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1906 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1907 snd_pcm_hw_rule_muldivk
, (void*) 8,
1908 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1911 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
1912 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1913 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1916 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME
,
1917 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1918 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1924 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream
*substream
)
1926 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1927 struct snd_pcm_hardware
*hw
= &runtime
->hw
;
1929 unsigned int mask
= 0;
1931 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1932 mask
|= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED
;
1933 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1934 mask
|= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
;
1935 if (hw
->info
& SNDRV_PCM_INFO_MMAP
) {
1936 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1937 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED
;
1938 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1939 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED
;
1940 if (hw
->info
& SNDRV_PCM_INFO_COMPLEX
)
1941 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX
;
1943 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_ACCESS
, mask
);
1947 err
= snd_pcm_hw_constraint_mask64(runtime
, SNDRV_PCM_HW_PARAM_FORMAT
, hw
->formats
);
1951 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_SUBFORMAT
, 1 << SNDRV_PCM_SUBFORMAT_STD
);
1955 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_CHANNELS
,
1956 hw
->channels_min
, hw
->channels_max
);
1960 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_RATE
,
1961 hw
->rate_min
, hw
->rate_max
);
1965 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1966 hw
->period_bytes_min
, hw
->period_bytes_max
);
1970 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIODS
,
1971 hw
->periods_min
, hw
->periods_max
);
1975 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1976 hw
->period_bytes_min
, hw
->buffer_bytes_max
);
1980 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1981 snd_pcm_hw_rule_buffer_bytes_max
, substream
,
1982 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, -1);
1987 if (runtime
->dma_bytes
) {
1988 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, 0, runtime
->dma_bytes
);
1993 if (!(hw
->rates
& (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))) {
1994 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1995 snd_pcm_hw_rule_rate
, hw
,
1996 SNDRV_PCM_HW_PARAM_RATE
, -1);
2001 /* FIXME: this belong to lowlevel */
2002 snd_pcm_hw_constraint_integer(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
);
2007 static void pcm_release_private(struct snd_pcm_substream
*substream
)
2009 snd_pcm_unlink(substream
);
2012 void snd_pcm_release_substream(struct snd_pcm_substream
*substream
)
2014 substream
->ref_count
--;
2015 if (substream
->ref_count
> 0)
2018 snd_pcm_drop(substream
);
2019 if (substream
->hw_opened
) {
2020 if (substream
->ops
->hw_free
!= NULL
)
2021 substream
->ops
->hw_free(substream
);
2022 substream
->ops
->close(substream
);
2023 substream
->hw_opened
= 0;
2025 if (substream
->pcm_release
) {
2026 substream
->pcm_release(substream
);
2027 substream
->pcm_release
= NULL
;
2029 snd_pcm_detach_substream(substream
);
2032 EXPORT_SYMBOL(snd_pcm_release_substream
);
2034 int snd_pcm_open_substream(struct snd_pcm
*pcm
, int stream
,
2036 struct snd_pcm_substream
**rsubstream
)
2038 struct snd_pcm_substream
*substream
;
2041 err
= snd_pcm_attach_substream(pcm
, stream
, file
, &substream
);
2044 if (substream
->ref_count
> 1) {
2045 *rsubstream
= substream
;
2049 err
= snd_pcm_hw_constraints_init(substream
);
2051 snd_printd("snd_pcm_hw_constraints_init failed\n");
2055 if ((err
= substream
->ops
->open(substream
)) < 0)
2058 substream
->hw_opened
= 1;
2060 err
= snd_pcm_hw_constraints_complete(substream
);
2062 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2066 *rsubstream
= substream
;
2070 snd_pcm_release_substream(substream
);
2074 EXPORT_SYMBOL(snd_pcm_open_substream
);
2076 static int snd_pcm_open_file(struct file
*file
,
2077 struct snd_pcm
*pcm
,
2079 struct snd_pcm_file
**rpcm_file
)
2081 struct snd_pcm_file
*pcm_file
;
2082 struct snd_pcm_substream
*substream
;
2083 struct snd_pcm_str
*str
;
2089 err
= snd_pcm_open_substream(pcm
, stream
, file
, &substream
);
2093 pcm_file
= kzalloc(sizeof(*pcm_file
), GFP_KERNEL
);
2094 if (pcm_file
== NULL
) {
2095 snd_pcm_release_substream(substream
);
2098 pcm_file
->substream
= substream
;
2099 if (substream
->ref_count
== 1) {
2100 str
= substream
->pstr
;
2101 substream
->file
= pcm_file
;
2102 substream
->pcm_release
= pcm_release_private
;
2104 file
->private_data
= pcm_file
;
2106 *rpcm_file
= pcm_file
;
2110 static int snd_pcm_playback_open(struct inode
*inode
, struct file
*file
)
2112 struct snd_pcm
*pcm
;
2114 pcm
= snd_lookup_minor_data(iminor(inode
),
2115 SNDRV_DEVICE_TYPE_PCM_PLAYBACK
);
2116 return snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_PLAYBACK
);
2119 static int snd_pcm_capture_open(struct inode
*inode
, struct file
*file
)
2121 struct snd_pcm
*pcm
;
2123 pcm
= snd_lookup_minor_data(iminor(inode
),
2124 SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
2125 return snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_CAPTURE
);
2128 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
)
2131 struct snd_pcm_file
*pcm_file
;
2138 err
= snd_card_file_add(pcm
->card
, file
);
2141 if (!try_module_get(pcm
->card
->module
)) {
2145 init_waitqueue_entry(&wait
, current
);
2146 add_wait_queue(&pcm
->open_wait
, &wait
);
2147 mutex_lock(&pcm
->open_mutex
);
2149 err
= snd_pcm_open_file(file
, pcm
, stream
, &pcm_file
);
2152 if (err
== -EAGAIN
) {
2153 if (file
->f_flags
& O_NONBLOCK
) {
2159 set_current_state(TASK_INTERRUPTIBLE
);
2160 mutex_unlock(&pcm
->open_mutex
);
2162 mutex_lock(&pcm
->open_mutex
);
2163 if (signal_pending(current
)) {
2168 remove_wait_queue(&pcm
->open_wait
, &wait
);
2169 mutex_unlock(&pcm
->open_mutex
);
2175 module_put(pcm
->card
->module
);
2177 snd_card_file_remove(pcm
->card
, file
);
2182 static int snd_pcm_release(struct inode
*inode
, struct file
*file
)
2184 struct snd_pcm
*pcm
;
2185 struct snd_pcm_substream
*substream
;
2186 struct snd_pcm_file
*pcm_file
;
2188 pcm_file
= file
->private_data
;
2189 substream
= pcm_file
->substream
;
2190 if (snd_BUG_ON(!substream
))
2192 pcm
= substream
->pcm
;
2193 mutex_lock(&pcm
->open_mutex
);
2194 snd_pcm_release_substream(substream
);
2196 mutex_unlock(&pcm
->open_mutex
);
2197 wake_up(&pcm
->open_wait
);
2198 module_put(pcm
->card
->module
);
2199 snd_card_file_remove(pcm
->card
, file
);
2203 static snd_pcm_sframes_t
snd_pcm_playback_rewind(struct snd_pcm_substream
*substream
,
2204 snd_pcm_uframes_t frames
)
2206 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2207 snd_pcm_sframes_t appl_ptr
;
2208 snd_pcm_sframes_t ret
;
2209 snd_pcm_sframes_t hw_avail
;
2214 snd_pcm_stream_lock_irq(substream
);
2215 switch (runtime
->status
->state
) {
2216 case SNDRV_PCM_STATE_PREPARED
:
2218 case SNDRV_PCM_STATE_DRAINING
:
2219 case SNDRV_PCM_STATE_RUNNING
:
2220 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2223 case SNDRV_PCM_STATE_XRUN
:
2226 case SNDRV_PCM_STATE_SUSPENDED
:
2234 hw_avail
= snd_pcm_playback_hw_avail(runtime
);
2235 if (hw_avail
<= 0) {
2239 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2241 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2243 appl_ptr
+= runtime
->boundary
;
2244 runtime
->control
->appl_ptr
= appl_ptr
;
2247 snd_pcm_stream_unlock_irq(substream
);
2251 static snd_pcm_sframes_t
snd_pcm_capture_rewind(struct snd_pcm_substream
*substream
,
2252 snd_pcm_uframes_t frames
)
2254 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2255 snd_pcm_sframes_t appl_ptr
;
2256 snd_pcm_sframes_t ret
;
2257 snd_pcm_sframes_t hw_avail
;
2262 snd_pcm_stream_lock_irq(substream
);
2263 switch (runtime
->status
->state
) {
2264 case SNDRV_PCM_STATE_PREPARED
:
2265 case SNDRV_PCM_STATE_DRAINING
:
2267 case SNDRV_PCM_STATE_RUNNING
:
2268 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2271 case SNDRV_PCM_STATE_XRUN
:
2274 case SNDRV_PCM_STATE_SUSPENDED
:
2282 hw_avail
= snd_pcm_capture_hw_avail(runtime
);
2283 if (hw_avail
<= 0) {
2287 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2289 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2291 appl_ptr
+= runtime
->boundary
;
2292 runtime
->control
->appl_ptr
= appl_ptr
;
2295 snd_pcm_stream_unlock_irq(substream
);
2299 static snd_pcm_sframes_t
snd_pcm_playback_forward(struct snd_pcm_substream
*substream
,
2300 snd_pcm_uframes_t frames
)
2302 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2303 snd_pcm_sframes_t appl_ptr
;
2304 snd_pcm_sframes_t ret
;
2305 snd_pcm_sframes_t avail
;
2310 snd_pcm_stream_lock_irq(substream
);
2311 switch (runtime
->status
->state
) {
2312 case SNDRV_PCM_STATE_PREPARED
:
2313 case SNDRV_PCM_STATE_PAUSED
:
2315 case SNDRV_PCM_STATE_DRAINING
:
2316 case SNDRV_PCM_STATE_RUNNING
:
2317 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2320 case SNDRV_PCM_STATE_XRUN
:
2323 case SNDRV_PCM_STATE_SUSPENDED
:
2331 avail
= snd_pcm_playback_avail(runtime
);
2336 if (frames
> (snd_pcm_uframes_t
)avail
)
2338 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2339 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2340 appl_ptr
-= runtime
->boundary
;
2341 runtime
->control
->appl_ptr
= appl_ptr
;
2344 snd_pcm_stream_unlock_irq(substream
);
2348 static snd_pcm_sframes_t
snd_pcm_capture_forward(struct snd_pcm_substream
*substream
,
2349 snd_pcm_uframes_t frames
)
2351 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2352 snd_pcm_sframes_t appl_ptr
;
2353 snd_pcm_sframes_t ret
;
2354 snd_pcm_sframes_t avail
;
2359 snd_pcm_stream_lock_irq(substream
);
2360 switch (runtime
->status
->state
) {
2361 case SNDRV_PCM_STATE_PREPARED
:
2362 case SNDRV_PCM_STATE_DRAINING
:
2363 case SNDRV_PCM_STATE_PAUSED
:
2365 case SNDRV_PCM_STATE_RUNNING
:
2366 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2369 case SNDRV_PCM_STATE_XRUN
:
2372 case SNDRV_PCM_STATE_SUSPENDED
:
2380 avail
= snd_pcm_capture_avail(runtime
);
2385 if (frames
> (snd_pcm_uframes_t
)avail
)
2387 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2388 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2389 appl_ptr
-= runtime
->boundary
;
2390 runtime
->control
->appl_ptr
= appl_ptr
;
2393 snd_pcm_stream_unlock_irq(substream
);
2397 static int snd_pcm_hwsync(struct snd_pcm_substream
*substream
)
2399 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2402 snd_pcm_stream_lock_irq(substream
);
2403 switch (runtime
->status
->state
) {
2404 case SNDRV_PCM_STATE_DRAINING
:
2405 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2407 case SNDRV_PCM_STATE_RUNNING
:
2408 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2411 case SNDRV_PCM_STATE_PREPARED
:
2412 case SNDRV_PCM_STATE_SUSPENDED
:
2415 case SNDRV_PCM_STATE_XRUN
:
2423 snd_pcm_stream_unlock_irq(substream
);
2427 static int snd_pcm_delay(struct snd_pcm_substream
*substream
,
2428 snd_pcm_sframes_t __user
*res
)
2430 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2432 snd_pcm_sframes_t n
= 0;
2434 snd_pcm_stream_lock_irq(substream
);
2435 switch (runtime
->status
->state
) {
2436 case SNDRV_PCM_STATE_DRAINING
:
2437 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2439 case SNDRV_PCM_STATE_RUNNING
:
2440 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2443 case SNDRV_PCM_STATE_PREPARED
:
2444 case SNDRV_PCM_STATE_SUSPENDED
:
2446 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2447 n
= snd_pcm_playback_hw_avail(runtime
);
2449 n
= snd_pcm_capture_avail(runtime
);
2450 n
+= runtime
->delay
;
2452 case SNDRV_PCM_STATE_XRUN
:
2460 snd_pcm_stream_unlock_irq(substream
);
2462 if (put_user(n
, res
))
2467 static int snd_pcm_sync_ptr(struct snd_pcm_substream
*substream
,
2468 struct snd_pcm_sync_ptr __user
*_sync_ptr
)
2470 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2471 struct snd_pcm_sync_ptr sync_ptr
;
2472 volatile struct snd_pcm_mmap_status
*status
;
2473 volatile struct snd_pcm_mmap_control
*control
;
2476 memset(&sync_ptr
, 0, sizeof(sync_ptr
));
2477 if (get_user(sync_ptr
.flags
, (unsigned __user
*)&(_sync_ptr
->flags
)))
2479 if (copy_from_user(&sync_ptr
.c
.control
, &(_sync_ptr
->c
.control
), sizeof(struct snd_pcm_mmap_control
)))
2481 status
= runtime
->status
;
2482 control
= runtime
->control
;
2483 if (sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_HWSYNC
) {
2484 err
= snd_pcm_hwsync(substream
);
2488 snd_pcm_stream_lock_irq(substream
);
2489 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_APPL
))
2490 control
->appl_ptr
= sync_ptr
.c
.control
.appl_ptr
;
2492 sync_ptr
.c
.control
.appl_ptr
= control
->appl_ptr
;
2493 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_AVAIL_MIN
))
2494 control
->avail_min
= sync_ptr
.c
.control
.avail_min
;
2496 sync_ptr
.c
.control
.avail_min
= control
->avail_min
;
2497 sync_ptr
.s
.status
.state
= status
->state
;
2498 sync_ptr
.s
.status
.hw_ptr
= status
->hw_ptr
;
2499 sync_ptr
.s
.status
.tstamp
= status
->tstamp
;
2500 sync_ptr
.s
.status
.suspended_state
= status
->suspended_state
;
2501 snd_pcm_stream_unlock_irq(substream
);
2502 if (copy_to_user(_sync_ptr
, &sync_ptr
, sizeof(sync_ptr
)))
2507 static int snd_pcm_tstamp(struct snd_pcm_substream
*substream
, int __user
*_arg
)
2509 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2512 if (get_user(arg
, _arg
))
2514 if (arg
< 0 || arg
> SNDRV_PCM_TSTAMP_TYPE_LAST
)
2516 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY
;
2517 if (arg
== SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
)
2518 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
;
2522 static int snd_pcm_common_ioctl1(struct file
*file
,
2523 struct snd_pcm_substream
*substream
,
2524 unsigned int cmd
, void __user
*arg
)
2527 case SNDRV_PCM_IOCTL_PVERSION
:
2528 return put_user(SNDRV_PCM_VERSION
, (int __user
*)arg
) ? -EFAULT
: 0;
2529 case SNDRV_PCM_IOCTL_INFO
:
2530 return snd_pcm_info_user(substream
, arg
);
2531 case SNDRV_PCM_IOCTL_TSTAMP
: /* just for compatibility */
2533 case SNDRV_PCM_IOCTL_TTSTAMP
:
2534 return snd_pcm_tstamp(substream
, arg
);
2535 case SNDRV_PCM_IOCTL_HW_REFINE
:
2536 return snd_pcm_hw_refine_user(substream
, arg
);
2537 case SNDRV_PCM_IOCTL_HW_PARAMS
:
2538 return snd_pcm_hw_params_user(substream
, arg
);
2539 case SNDRV_PCM_IOCTL_HW_FREE
:
2540 return snd_pcm_hw_free(substream
);
2541 case SNDRV_PCM_IOCTL_SW_PARAMS
:
2542 return snd_pcm_sw_params_user(substream
, arg
);
2543 case SNDRV_PCM_IOCTL_STATUS
:
2544 return snd_pcm_status_user(substream
, arg
);
2545 case SNDRV_PCM_IOCTL_CHANNEL_INFO
:
2546 return snd_pcm_channel_info_user(substream
, arg
);
2547 case SNDRV_PCM_IOCTL_PREPARE
:
2548 return snd_pcm_prepare(substream
, file
);
2549 case SNDRV_PCM_IOCTL_RESET
:
2550 return snd_pcm_reset(substream
);
2551 case SNDRV_PCM_IOCTL_START
:
2552 return snd_pcm_action_lock_irq(&snd_pcm_action_start
, substream
, SNDRV_PCM_STATE_RUNNING
);
2553 case SNDRV_PCM_IOCTL_LINK
:
2554 return snd_pcm_link(substream
, (int)(unsigned long) arg
);
2555 case SNDRV_PCM_IOCTL_UNLINK
:
2556 return snd_pcm_unlink(substream
);
2557 case SNDRV_PCM_IOCTL_RESUME
:
2558 return snd_pcm_resume(substream
);
2559 case SNDRV_PCM_IOCTL_XRUN
:
2560 return snd_pcm_xrun(substream
);
2561 case SNDRV_PCM_IOCTL_HWSYNC
:
2562 return snd_pcm_hwsync(substream
);
2563 case SNDRV_PCM_IOCTL_DELAY
:
2564 return snd_pcm_delay(substream
, arg
);
2565 case SNDRV_PCM_IOCTL_SYNC_PTR
:
2566 return snd_pcm_sync_ptr(substream
, arg
);
2567 #ifdef CONFIG_SND_SUPPORT_OLD_API
2568 case SNDRV_PCM_IOCTL_HW_REFINE_OLD
:
2569 return snd_pcm_hw_refine_old_user(substream
, arg
);
2570 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD
:
2571 return snd_pcm_hw_params_old_user(substream
, arg
);
2573 case SNDRV_PCM_IOCTL_DRAIN
:
2574 return snd_pcm_drain(substream
, file
);
2575 case SNDRV_PCM_IOCTL_DROP
:
2576 return snd_pcm_drop(substream
);
2577 case SNDRV_PCM_IOCTL_PAUSE
:
2580 snd_pcm_stream_lock_irq(substream
);
2581 res
= snd_pcm_pause(substream
, (int)(unsigned long)arg
);
2582 snd_pcm_stream_unlock_irq(substream
);
2586 snd_printd("unknown ioctl = 0x%x\n", cmd
);
2590 static int snd_pcm_playback_ioctl1(struct file
*file
,
2591 struct snd_pcm_substream
*substream
,
2592 unsigned int cmd
, void __user
*arg
)
2594 if (snd_BUG_ON(!substream
))
2596 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
2599 case SNDRV_PCM_IOCTL_WRITEI_FRAMES
:
2601 struct snd_xferi xferi
;
2602 struct snd_xferi __user
*_xferi
= arg
;
2603 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2604 snd_pcm_sframes_t result
;
2605 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2607 if (put_user(0, &_xferi
->result
))
2609 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2611 result
= snd_pcm_lib_write(substream
, xferi
.buf
, xferi
.frames
);
2612 __put_user(result
, &_xferi
->result
);
2613 return result
< 0 ? result
: 0;
2615 case SNDRV_PCM_IOCTL_WRITEN_FRAMES
:
2617 struct snd_xfern xfern
;
2618 struct snd_xfern __user
*_xfern
= arg
;
2619 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2621 snd_pcm_sframes_t result
;
2622 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2624 if (runtime
->channels
> 128)
2626 if (put_user(0, &_xfern
->result
))
2628 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2631 bufs
= memdup_user(xfern
.bufs
,
2632 sizeof(void *) * runtime
->channels
);
2634 return PTR_ERR(bufs
);
2635 result
= snd_pcm_lib_writev(substream
, bufs
, xfern
.frames
);
2637 __put_user(result
, &_xfern
->result
);
2638 return result
< 0 ? result
: 0;
2640 case SNDRV_PCM_IOCTL_REWIND
:
2642 snd_pcm_uframes_t frames
;
2643 snd_pcm_uframes_t __user
*_frames
= arg
;
2644 snd_pcm_sframes_t result
;
2645 if (get_user(frames
, _frames
))
2647 if (put_user(0, _frames
))
2649 result
= snd_pcm_playback_rewind(substream
, frames
);
2650 __put_user(result
, _frames
);
2651 return result
< 0 ? result
: 0;
2653 case SNDRV_PCM_IOCTL_FORWARD
:
2655 snd_pcm_uframes_t frames
;
2656 snd_pcm_uframes_t __user
*_frames
= arg
;
2657 snd_pcm_sframes_t result
;
2658 if (get_user(frames
, _frames
))
2660 if (put_user(0, _frames
))
2662 result
= snd_pcm_playback_forward(substream
, frames
);
2663 __put_user(result
, _frames
);
2664 return result
< 0 ? result
: 0;
2667 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2670 static int snd_pcm_capture_ioctl1(struct file
*file
,
2671 struct snd_pcm_substream
*substream
,
2672 unsigned int cmd
, void __user
*arg
)
2674 if (snd_BUG_ON(!substream
))
2676 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_CAPTURE
))
2679 case SNDRV_PCM_IOCTL_READI_FRAMES
:
2681 struct snd_xferi xferi
;
2682 struct snd_xferi __user
*_xferi
= arg
;
2683 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2684 snd_pcm_sframes_t result
;
2685 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2687 if (put_user(0, &_xferi
->result
))
2689 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2691 result
= snd_pcm_lib_read(substream
, xferi
.buf
, xferi
.frames
);
2692 __put_user(result
, &_xferi
->result
);
2693 return result
< 0 ? result
: 0;
2695 case SNDRV_PCM_IOCTL_READN_FRAMES
:
2697 struct snd_xfern xfern
;
2698 struct snd_xfern __user
*_xfern
= arg
;
2699 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2701 snd_pcm_sframes_t result
;
2702 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2704 if (runtime
->channels
> 128)
2706 if (put_user(0, &_xfern
->result
))
2708 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2711 bufs
= memdup_user(xfern
.bufs
,
2712 sizeof(void *) * runtime
->channels
);
2714 return PTR_ERR(bufs
);
2715 result
= snd_pcm_lib_readv(substream
, bufs
, xfern
.frames
);
2717 __put_user(result
, &_xfern
->result
);
2718 return result
< 0 ? result
: 0;
2720 case SNDRV_PCM_IOCTL_REWIND
:
2722 snd_pcm_uframes_t frames
;
2723 snd_pcm_uframes_t __user
*_frames
= arg
;
2724 snd_pcm_sframes_t result
;
2725 if (get_user(frames
, _frames
))
2727 if (put_user(0, _frames
))
2729 result
= snd_pcm_capture_rewind(substream
, frames
);
2730 __put_user(result
, _frames
);
2731 return result
< 0 ? result
: 0;
2733 case SNDRV_PCM_IOCTL_FORWARD
:
2735 snd_pcm_uframes_t frames
;
2736 snd_pcm_uframes_t __user
*_frames
= arg
;
2737 snd_pcm_sframes_t result
;
2738 if (get_user(frames
, _frames
))
2740 if (put_user(0, _frames
))
2742 result
= snd_pcm_capture_forward(substream
, frames
);
2743 __put_user(result
, _frames
);
2744 return result
< 0 ? result
: 0;
2747 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2750 static long snd_pcm_playback_ioctl(struct file
*file
, unsigned int cmd
,
2753 struct snd_pcm_file
*pcm_file
;
2755 pcm_file
= file
->private_data
;
2757 if (((cmd
>> 8) & 0xff) != 'A')
2760 return snd_pcm_playback_ioctl1(file
, pcm_file
->substream
, cmd
,
2761 (void __user
*)arg
);
2764 static long snd_pcm_capture_ioctl(struct file
*file
, unsigned int cmd
,
2767 struct snd_pcm_file
*pcm_file
;
2769 pcm_file
= file
->private_data
;
2771 if (((cmd
>> 8) & 0xff) != 'A')
2774 return snd_pcm_capture_ioctl1(file
, pcm_file
->substream
, cmd
,
2775 (void __user
*)arg
);
2778 int snd_pcm_kernel_ioctl(struct snd_pcm_substream
*substream
,
2779 unsigned int cmd
, void *arg
)
2784 fs
= snd_enter_user();
2785 switch (substream
->stream
) {
2786 case SNDRV_PCM_STREAM_PLAYBACK
:
2787 result
= snd_pcm_playback_ioctl1(NULL
, substream
, cmd
,
2788 (void __user
*)arg
);
2790 case SNDRV_PCM_STREAM_CAPTURE
:
2791 result
= snd_pcm_capture_ioctl1(NULL
, substream
, cmd
,
2792 (void __user
*)arg
);
2802 EXPORT_SYMBOL(snd_pcm_kernel_ioctl
);
2804 static ssize_t
snd_pcm_read(struct file
*file
, char __user
*buf
, size_t count
,
2807 struct snd_pcm_file
*pcm_file
;
2808 struct snd_pcm_substream
*substream
;
2809 struct snd_pcm_runtime
*runtime
;
2810 snd_pcm_sframes_t result
;
2812 pcm_file
= file
->private_data
;
2813 substream
= pcm_file
->substream
;
2814 if (PCM_RUNTIME_CHECK(substream
))
2816 runtime
= substream
->runtime
;
2817 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2819 if (!frame_aligned(runtime
, count
))
2821 count
= bytes_to_frames(runtime
, count
);
2822 result
= snd_pcm_lib_read(substream
, buf
, count
);
2824 result
= frames_to_bytes(runtime
, result
);
2828 static ssize_t
snd_pcm_write(struct file
*file
, const char __user
*buf
,
2829 size_t count
, loff_t
* offset
)
2831 struct snd_pcm_file
*pcm_file
;
2832 struct snd_pcm_substream
*substream
;
2833 struct snd_pcm_runtime
*runtime
;
2834 snd_pcm_sframes_t result
;
2836 pcm_file
= file
->private_data
;
2837 substream
= pcm_file
->substream
;
2838 if (PCM_RUNTIME_CHECK(substream
))
2840 runtime
= substream
->runtime
;
2841 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2843 if (!frame_aligned(runtime
, count
))
2845 count
= bytes_to_frames(runtime
, count
);
2846 result
= snd_pcm_lib_write(substream
, buf
, count
);
2848 result
= frames_to_bytes(runtime
, result
);
2852 static ssize_t
snd_pcm_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
2853 unsigned long nr_segs
, loff_t pos
)
2856 struct snd_pcm_file
*pcm_file
;
2857 struct snd_pcm_substream
*substream
;
2858 struct snd_pcm_runtime
*runtime
;
2859 snd_pcm_sframes_t result
;
2862 snd_pcm_uframes_t frames
;
2864 pcm_file
= iocb
->ki_filp
->private_data
;
2865 substream
= pcm_file
->substream
;
2866 if (PCM_RUNTIME_CHECK(substream
))
2868 runtime
= substream
->runtime
;
2869 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2871 if (nr_segs
> 1024 || nr_segs
!= runtime
->channels
)
2873 if (!frame_aligned(runtime
, iov
->iov_len
))
2875 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2876 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2879 for (i
= 0; i
< nr_segs
; ++i
)
2880 bufs
[i
] = iov
[i
].iov_base
;
2881 result
= snd_pcm_lib_readv(substream
, bufs
, frames
);
2883 result
= frames_to_bytes(runtime
, result
);
2888 static ssize_t
snd_pcm_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
2889 unsigned long nr_segs
, loff_t pos
)
2891 struct snd_pcm_file
*pcm_file
;
2892 struct snd_pcm_substream
*substream
;
2893 struct snd_pcm_runtime
*runtime
;
2894 snd_pcm_sframes_t result
;
2897 snd_pcm_uframes_t frames
;
2899 pcm_file
= iocb
->ki_filp
->private_data
;
2900 substream
= pcm_file
->substream
;
2901 if (PCM_RUNTIME_CHECK(substream
))
2903 runtime
= substream
->runtime
;
2904 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2906 if (nr_segs
> 128 || nr_segs
!= runtime
->channels
||
2907 !frame_aligned(runtime
, iov
->iov_len
))
2909 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2910 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2913 for (i
= 0; i
< nr_segs
; ++i
)
2914 bufs
[i
] = iov
[i
].iov_base
;
2915 result
= snd_pcm_lib_writev(substream
, bufs
, frames
);
2917 result
= frames_to_bytes(runtime
, result
);
2922 static unsigned int snd_pcm_playback_poll(struct file
*file
, poll_table
* wait
)
2924 struct snd_pcm_file
*pcm_file
;
2925 struct snd_pcm_substream
*substream
;
2926 struct snd_pcm_runtime
*runtime
;
2928 snd_pcm_uframes_t avail
;
2930 pcm_file
= file
->private_data
;
2932 substream
= pcm_file
->substream
;
2933 if (PCM_RUNTIME_CHECK(substream
))
2935 runtime
= substream
->runtime
;
2937 poll_wait(file
, &runtime
->sleep
, wait
);
2939 snd_pcm_stream_lock_irq(substream
);
2940 avail
= snd_pcm_playback_avail(runtime
);
2941 switch (runtime
->status
->state
) {
2942 case SNDRV_PCM_STATE_RUNNING
:
2943 case SNDRV_PCM_STATE_PREPARED
:
2944 case SNDRV_PCM_STATE_PAUSED
:
2945 if (avail
>= runtime
->control
->avail_min
) {
2946 mask
= POLLOUT
| POLLWRNORM
;
2950 case SNDRV_PCM_STATE_DRAINING
:
2954 mask
= POLLOUT
| POLLWRNORM
| POLLERR
;
2957 snd_pcm_stream_unlock_irq(substream
);
2961 static unsigned int snd_pcm_capture_poll(struct file
*file
, poll_table
* wait
)
2963 struct snd_pcm_file
*pcm_file
;
2964 struct snd_pcm_substream
*substream
;
2965 struct snd_pcm_runtime
*runtime
;
2967 snd_pcm_uframes_t avail
;
2969 pcm_file
= file
->private_data
;
2971 substream
= pcm_file
->substream
;
2972 if (PCM_RUNTIME_CHECK(substream
))
2974 runtime
= substream
->runtime
;
2976 poll_wait(file
, &runtime
->sleep
, wait
);
2978 snd_pcm_stream_lock_irq(substream
);
2979 avail
= snd_pcm_capture_avail(runtime
);
2980 switch (runtime
->status
->state
) {
2981 case SNDRV_PCM_STATE_RUNNING
:
2982 case SNDRV_PCM_STATE_PREPARED
:
2983 case SNDRV_PCM_STATE_PAUSED
:
2984 if (avail
>= runtime
->control
->avail_min
) {
2985 mask
= POLLIN
| POLLRDNORM
;
2990 case SNDRV_PCM_STATE_DRAINING
:
2992 mask
= POLLIN
| POLLRDNORM
;
2997 mask
= POLLIN
| POLLRDNORM
| POLLERR
;
3000 snd_pcm_stream_unlock_irq(substream
);
3009 * Only on coherent architectures, we can mmap the status and the control records
3010 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3012 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3014 * mmap status record
3016 static int snd_pcm_mmap_status_fault(struct vm_area_struct
*area
,
3017 struct vm_fault
*vmf
)
3019 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3020 struct snd_pcm_runtime
*runtime
;
3022 if (substream
== NULL
)
3023 return VM_FAULT_SIGBUS
;
3024 runtime
= substream
->runtime
;
3025 vmf
->page
= virt_to_page(runtime
->status
);
3026 get_page(vmf
->page
);
3030 static const struct vm_operations_struct snd_pcm_vm_ops_status
=
3032 .fault
= snd_pcm_mmap_status_fault
,
3035 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3036 struct vm_area_struct
*area
)
3038 struct snd_pcm_runtime
*runtime
;
3040 if (!(area
->vm_flags
& VM_READ
))
3042 runtime
= substream
->runtime
;
3043 size
= area
->vm_end
- area
->vm_start
;
3044 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)))
3046 area
->vm_ops
= &snd_pcm_vm_ops_status
;
3047 area
->vm_private_data
= substream
;
3048 area
->vm_flags
|= VM_RESERVED
;
3053 * mmap control record
3055 static int snd_pcm_mmap_control_fault(struct vm_area_struct
*area
,
3056 struct vm_fault
*vmf
)
3058 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3059 struct snd_pcm_runtime
*runtime
;
3061 if (substream
== NULL
)
3062 return VM_FAULT_SIGBUS
;
3063 runtime
= substream
->runtime
;
3064 vmf
->page
= virt_to_page(runtime
->control
);
3065 get_page(vmf
->page
);
3069 static const struct vm_operations_struct snd_pcm_vm_ops_control
=
3071 .fault
= snd_pcm_mmap_control_fault
,
3074 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3075 struct vm_area_struct
*area
)
3077 struct snd_pcm_runtime
*runtime
;
3079 if (!(area
->vm_flags
& VM_READ
))
3081 runtime
= substream
->runtime
;
3082 size
= area
->vm_end
- area
->vm_start
;
3083 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
)))
3085 area
->vm_ops
= &snd_pcm_vm_ops_control
;
3086 area
->vm_private_data
= substream
;
3087 area
->vm_flags
|= VM_RESERVED
;
3090 #else /* ! coherent mmap */
3092 * don't support mmap for status and control records.
3094 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3095 struct vm_area_struct
*area
)
3099 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3100 struct vm_area_struct
*area
)
3104 #endif /* coherent mmap */
3106 static inline struct page
*
3107 snd_pcm_default_page_ops(struct snd_pcm_substream
*substream
, unsigned long ofs
)
3109 void *vaddr
= substream
->runtime
->dma_area
+ ofs
;
3110 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3111 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3112 return virt_to_page(CAC_ADDR(vaddr
));
3114 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3115 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
) {
3116 dma_addr_t addr
= substream
->runtime
->dma_addr
+ ofs
;
3117 addr
-= get_dma_offset(substream
->dma_buffer
.dev
.dev
);
3118 /* assume dma_handle set via pfn_to_phys() in
3119 * mm/dma-noncoherent.c
3121 return pfn_to_page(addr
>> PAGE_SHIFT
);
3124 return virt_to_page(vaddr
);
3128 * fault callback for mmapping a RAM page
3130 static int snd_pcm_mmap_data_fault(struct vm_area_struct
*area
,
3131 struct vm_fault
*vmf
)
3133 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3134 struct snd_pcm_runtime
*runtime
;
3135 unsigned long offset
;
3139 if (substream
== NULL
)
3140 return VM_FAULT_SIGBUS
;
3141 runtime
= substream
->runtime
;
3142 offset
= vmf
->pgoff
<< PAGE_SHIFT
;
3143 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3144 if (offset
> dma_bytes
- PAGE_SIZE
)
3145 return VM_FAULT_SIGBUS
;
3146 if (substream
->ops
->page
)
3147 page
= substream
->ops
->page(substream
, offset
);
3149 page
= snd_pcm_default_page_ops(substream
, offset
);
3151 return VM_FAULT_SIGBUS
;
3157 static const struct vm_operations_struct snd_pcm_vm_ops_data
= {
3158 .open
= snd_pcm_mmap_data_open
,
3159 .close
= snd_pcm_mmap_data_close
,
3162 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault
= {
3163 .open
= snd_pcm_mmap_data_open
,
3164 .close
= snd_pcm_mmap_data_close
,
3165 .fault
= snd_pcm_mmap_data_fault
,
3168 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3169 /* This should be defined / handled globally! */
3171 #define ARCH_HAS_DMA_MMAP_COHERENT
3176 * mmap the DMA buffer on RAM
3178 static int snd_pcm_default_mmap(struct snd_pcm_substream
*substream
,
3179 struct vm_area_struct
*area
)
3181 area
->vm_flags
|= VM_RESERVED
;
3182 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3183 if (!substream
->ops
->page
&&
3184 substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3185 return dma_mmap_coherent(substream
->dma_buffer
.dev
.dev
,
3187 substream
->runtime
->dma_area
,
3188 substream
->runtime
->dma_addr
,
3189 area
->vm_end
- area
->vm_start
);
3190 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3191 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
&&
3192 !plat_device_is_coherent(substream
->dma_buffer
.dev
.dev
))
3193 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3194 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3195 /* mmap with fault handler */
3196 area
->vm_ops
= &snd_pcm_vm_ops_data_fault
;
3201 * mmap the DMA buffer on I/O memory area
3203 #if SNDRV_PCM_INFO_MMAP_IOMEM
3204 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream
*substream
,
3205 struct vm_area_struct
*area
)
3208 unsigned long offset
;
3210 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3211 area
->vm_flags
|= VM_IO
;
3212 size
= area
->vm_end
- area
->vm_start
;
3213 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3214 if (io_remap_pfn_range(area
, area
->vm_start
,
3215 (substream
->runtime
->dma_addr
+ offset
) >> PAGE_SHIFT
,
3216 size
, area
->vm_page_prot
))
3221 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem
);
3222 #endif /* SNDRV_PCM_INFO_MMAP */
3224 /* mmap callback with pgprot_noncached */
3225 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream
*substream
,
3226 struct vm_area_struct
*area
)
3228 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3229 return snd_pcm_default_mmap(substream
, area
);
3231 EXPORT_SYMBOL(snd_pcm_lib_mmap_noncached
);
3236 int snd_pcm_mmap_data(struct snd_pcm_substream
*substream
, struct file
*file
,
3237 struct vm_area_struct
*area
)
3239 struct snd_pcm_runtime
*runtime
;
3241 unsigned long offset
;
3245 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
3246 if (!(area
->vm_flags
& (VM_WRITE
|VM_READ
)))
3249 if (!(area
->vm_flags
& VM_READ
))
3252 runtime
= substream
->runtime
;
3253 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3255 if (!(runtime
->info
& SNDRV_PCM_INFO_MMAP
))
3257 if (runtime
->access
== SNDRV_PCM_ACCESS_RW_INTERLEAVED
||
3258 runtime
->access
== SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
)
3260 size
= area
->vm_end
- area
->vm_start
;
3261 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3262 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3263 if ((size_t)size
> dma_bytes
)
3265 if (offset
> dma_bytes
- size
)
3268 area
->vm_ops
= &snd_pcm_vm_ops_data
;
3269 area
->vm_private_data
= substream
;
3270 if (substream
->ops
->mmap
)
3271 err
= substream
->ops
->mmap(substream
, area
);
3273 err
= snd_pcm_default_mmap(substream
, area
);
3275 atomic_inc(&substream
->mmap_count
);
3279 EXPORT_SYMBOL(snd_pcm_mmap_data
);
3281 static int snd_pcm_mmap(struct file
*file
, struct vm_area_struct
*area
)
3283 struct snd_pcm_file
* pcm_file
;
3284 struct snd_pcm_substream
*substream
;
3285 unsigned long offset
;
3287 pcm_file
= file
->private_data
;
3288 substream
= pcm_file
->substream
;
3289 if (PCM_RUNTIME_CHECK(substream
))
3292 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3294 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3295 if (pcm_file
->no_compat_mmap
)
3297 return snd_pcm_mmap_status(substream
, file
, area
);
3298 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3299 if (pcm_file
->no_compat_mmap
)
3301 return snd_pcm_mmap_control(substream
, file
, area
);
3303 return snd_pcm_mmap_data(substream
, file
, area
);
3308 static int snd_pcm_fasync(int fd
, struct file
* file
, int on
)
3310 struct snd_pcm_file
* pcm_file
;
3311 struct snd_pcm_substream
*substream
;
3312 struct snd_pcm_runtime
*runtime
;
3316 pcm_file
= file
->private_data
;
3317 substream
= pcm_file
->substream
;
3318 if (PCM_RUNTIME_CHECK(substream
))
3320 runtime
= substream
->runtime
;
3321 err
= fasync_helper(fd
, file
, on
, &runtime
->fasync
);
3330 #ifdef CONFIG_COMPAT
3331 #include "pcm_compat.c"
3333 #define snd_pcm_ioctl_compat NULL
3337 * To be removed helpers to keep binary compatibility
3340 #ifdef CONFIG_SND_SUPPORT_OLD_API
3341 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3342 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3344 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params
*params
,
3345 struct snd_pcm_hw_params_old
*oparams
)
3349 memset(params
, 0, sizeof(*params
));
3350 params
->flags
= oparams
->flags
;
3351 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3352 params
->masks
[i
].bits
[0] = oparams
->masks
[i
];
3353 memcpy(params
->intervals
, oparams
->intervals
, sizeof(oparams
->intervals
));
3354 params
->rmask
= __OLD_TO_NEW_MASK(oparams
->rmask
);
3355 params
->cmask
= __OLD_TO_NEW_MASK(oparams
->cmask
);
3356 params
->info
= oparams
->info
;
3357 params
->msbits
= oparams
->msbits
;
3358 params
->rate_num
= oparams
->rate_num
;
3359 params
->rate_den
= oparams
->rate_den
;
3360 params
->fifo_size
= oparams
->fifo_size
;
3363 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old
*oparams
,
3364 struct snd_pcm_hw_params
*params
)
3368 memset(oparams
, 0, sizeof(*oparams
));
3369 oparams
->flags
= params
->flags
;
3370 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3371 oparams
->masks
[i
] = params
->masks
[i
].bits
[0];
3372 memcpy(oparams
->intervals
, params
->intervals
, sizeof(oparams
->intervals
));
3373 oparams
->rmask
= __NEW_TO_OLD_MASK(params
->rmask
);
3374 oparams
->cmask
= __NEW_TO_OLD_MASK(params
->cmask
);
3375 oparams
->info
= params
->info
;
3376 oparams
->msbits
= params
->msbits
;
3377 oparams
->rate_num
= params
->rate_num
;
3378 oparams
->rate_den
= params
->rate_den
;
3379 oparams
->fifo_size
= params
->fifo_size
;
3382 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
3383 struct snd_pcm_hw_params_old __user
* _oparams
)
3385 struct snd_pcm_hw_params
*params
;
3386 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3389 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3393 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3394 if (IS_ERR(oparams
)) {
3395 err
= PTR_ERR(oparams
);
3398 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3399 err
= snd_pcm_hw_refine(substream
, params
);
3400 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3401 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3412 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
3413 struct snd_pcm_hw_params_old __user
* _oparams
)
3415 struct snd_pcm_hw_params
*params
;
3416 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3419 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3423 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3424 if (IS_ERR(oparams
)) {
3425 err
= PTR_ERR(oparams
);
3428 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3429 err
= snd_pcm_hw_params(substream
, params
);
3430 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3431 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3441 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3444 unsigned long dummy_get_unmapped_area(struct file
*file
, unsigned long addr
,
3445 unsigned long len
, unsigned long pgoff
,
3446 unsigned long flags
)
3451 # define dummy_get_unmapped_area NULL
3458 const struct file_operations snd_pcm_f_ops
[2] = {
3460 .owner
= THIS_MODULE
,
3461 .write
= snd_pcm_write
,
3462 .aio_write
= snd_pcm_aio_write
,
3463 .open
= snd_pcm_playback_open
,
3464 .release
= snd_pcm_release
,
3465 .poll
= snd_pcm_playback_poll
,
3466 .unlocked_ioctl
= snd_pcm_playback_ioctl
,
3467 .compat_ioctl
= snd_pcm_ioctl_compat
,
3468 .mmap
= snd_pcm_mmap
,
3469 .fasync
= snd_pcm_fasync
,
3470 .get_unmapped_area
= dummy_get_unmapped_area
,
3473 .owner
= THIS_MODULE
,
3474 .read
= snd_pcm_read
,
3475 .aio_read
= snd_pcm_aio_read
,
3476 .open
= snd_pcm_capture_open
,
3477 .release
= snd_pcm_release
,
3478 .poll
= snd_pcm_capture_poll
,
3479 .unlocked_ioctl
= snd_pcm_capture_ioctl
,
3480 .compat_ioctl
= snd_pcm_ioctl_compat
,
3481 .mmap
= snd_pcm_mmap
,
3482 .fasync
= snd_pcm_fasync
,
3483 .get_unmapped_area
= dummy_get_unmapped_area
,