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/module.h>
24 #include <linux/file.h>
25 #include <linux/slab.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos.h>
28 #include <linux/aio.h>
29 #include <linux/dma-mapping.h>
30 #include <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/info.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/timer.h>
36 #include <sound/minors.h>
38 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
39 #include <dma-coherence.h>
46 struct snd_pcm_hw_params_old
{
48 unsigned int masks
[SNDRV_PCM_HW_PARAM_SUBFORMAT
-
49 SNDRV_PCM_HW_PARAM_ACCESS
+ 1];
50 struct snd_interval intervals
[SNDRV_PCM_HW_PARAM_TICK_TIME
-
51 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
+ 1];
56 unsigned int rate_num
;
57 unsigned int rate_den
;
58 snd_pcm_uframes_t fifo_size
;
59 unsigned char reserved
[64];
62 #ifdef CONFIG_SND_SUPPORT_OLD_API
63 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
64 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
66 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
67 struct snd_pcm_hw_params_old __user
* _oparams
);
68 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
69 struct snd_pcm_hw_params_old __user
* _oparams
);
71 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
);
77 DEFINE_RWLOCK(snd_pcm_link_rwlock
);
78 EXPORT_SYMBOL(snd_pcm_link_rwlock
);
80 static DECLARE_RWSEM(snd_pcm_link_rwsem
);
82 static inline mm_segment_t
snd_enter_user(void)
84 mm_segment_t fs
= get_fs();
89 static inline void snd_leave_user(mm_segment_t fs
)
96 int snd_pcm_info(struct snd_pcm_substream
*substream
, struct snd_pcm_info
*info
)
98 struct snd_pcm_runtime
*runtime
;
99 struct snd_pcm
*pcm
= substream
->pcm
;
100 struct snd_pcm_str
*pstr
= substream
->pstr
;
102 memset(info
, 0, sizeof(*info
));
103 info
->card
= pcm
->card
->number
;
104 info
->device
= pcm
->device
;
105 info
->stream
= substream
->stream
;
106 info
->subdevice
= substream
->number
;
107 strlcpy(info
->id
, pcm
->id
, sizeof(info
->id
));
108 strlcpy(info
->name
, pcm
->name
, sizeof(info
->name
));
109 info
->dev_class
= pcm
->dev_class
;
110 info
->dev_subclass
= pcm
->dev_subclass
;
111 info
->subdevices_count
= pstr
->substream_count
;
112 info
->subdevices_avail
= pstr
->substream_count
- pstr
->substream_opened
;
113 strlcpy(info
->subname
, substream
->name
, sizeof(info
->subname
));
114 runtime
= substream
->runtime
;
115 /* AB: FIXME!!! This is definitely nonsense */
117 info
->sync
= runtime
->sync
;
118 substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_INFO
, info
);
123 int snd_pcm_info_user(struct snd_pcm_substream
*substream
,
124 struct snd_pcm_info __user
* _info
)
126 struct snd_pcm_info
*info
;
129 info
= kmalloc(sizeof(*info
), GFP_KERNEL
);
132 err
= snd_pcm_info(substream
, info
);
134 if (copy_to_user(_info
, info
, sizeof(*info
)))
144 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
145 static const char * const snd_pcm_hw_param_names
[] = {
149 HW_PARAM(SAMPLE_BITS
),
150 HW_PARAM(FRAME_BITS
),
153 HW_PARAM(PERIOD_TIME
),
154 HW_PARAM(PERIOD_SIZE
),
155 HW_PARAM(PERIOD_BYTES
),
157 HW_PARAM(BUFFER_TIME
),
158 HW_PARAM(BUFFER_SIZE
),
159 HW_PARAM(BUFFER_BYTES
),
164 int snd_pcm_hw_refine(struct snd_pcm_substream
*substream
,
165 struct snd_pcm_hw_params
*params
)
168 struct snd_pcm_hardware
*hw
;
169 struct snd_interval
*i
= NULL
;
170 struct snd_mask
*m
= NULL
;
171 struct snd_pcm_hw_constraints
*constrs
= &substream
->runtime
->hw_constraints
;
172 unsigned int rstamps
[constrs
->rules_num
];
173 unsigned int vstamps
[SNDRV_PCM_HW_PARAM_LAST_INTERVAL
+ 1];
174 unsigned int stamp
= 2;
178 params
->fifo_size
= 0;
179 if (params
->rmask
& (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS
))
181 if (params
->rmask
& (1 << SNDRV_PCM_HW_PARAM_RATE
)) {
182 params
->rate_num
= 0;
183 params
->rate_den
= 0;
186 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
187 m
= hw_param_mask(params
, k
);
188 if (snd_mask_empty(m
))
190 if (!(params
->rmask
& (1 << k
)))
193 pr_debug("%s = ", snd_pcm_hw_param_names
[k
]);
194 pr_cont("%04x%04x%04x%04x -> ", m
->bits
[3], m
->bits
[2], m
->bits
[1], m
->bits
[0]);
196 changed
= snd_mask_refine(m
, constrs_mask(constrs
, k
));
198 pr_cont("%04x%04x%04x%04x\n", m
->bits
[3], m
->bits
[2], m
->bits
[1], m
->bits
[0]);
201 params
->cmask
|= 1 << k
;
206 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
207 i
= hw_param_interval(params
, k
);
208 if (snd_interval_empty(i
))
210 if (!(params
->rmask
& (1 << k
)))
213 pr_debug("%s = ", snd_pcm_hw_param_names
[k
]);
218 i
->openmin
? '(' : '[', i
->min
,
219 i
->max
, i
->openmax
? ')' : ']');
222 changed
= snd_interval_refine(i
, constrs_interval(constrs
, k
));
227 pr_cont("%c%u %u%c\n",
228 i
->openmin
? '(' : '[', i
->min
,
229 i
->max
, i
->openmax
? ')' : ']');
232 params
->cmask
|= 1 << k
;
237 for (k
= 0; k
< constrs
->rules_num
; k
++)
239 for (k
= 0; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++)
240 vstamps
[k
] = (params
->rmask
& (1 << k
)) ? 1 : 0;
243 for (k
= 0; k
< constrs
->rules_num
; k
++) {
244 struct snd_pcm_hw_rule
*r
= &constrs
->rules
[k
];
247 if (r
->cond
&& !(r
->cond
& params
->flags
))
249 for (d
= 0; r
->deps
[d
] >= 0; d
++) {
250 if (vstamps
[r
->deps
[d
]] > rstamps
[k
]) {
258 pr_debug("Rule %d [%p]: ", k
, r
->func
);
260 pr_cont("%s = ", snd_pcm_hw_param_names
[r
->var
]);
261 if (hw_is_mask(r
->var
)) {
262 m
= hw_param_mask(params
, r
->var
);
263 pr_cont("%x", *m
->bits
);
265 i
= hw_param_interval(params
, r
->var
);
270 i
->openmin
? '(' : '[', i
->min
,
271 i
->max
, i
->openmax
? ')' : ']');
275 changed
= r
->func(params
, r
);
279 if (hw_is_mask(r
->var
))
280 pr_cont("%x", *m
->bits
);
286 i
->openmin
? '(' : '[', i
->min
,
287 i
->max
, i
->openmax
? ')' : ']');
293 if (changed
&& r
->var
>= 0) {
294 params
->cmask
|= (1 << r
->var
);
295 vstamps
[r
->var
] = stamp
;
303 if (!params
->msbits
) {
304 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
);
305 if (snd_interval_single(i
))
306 params
->msbits
= snd_interval_value(i
);
309 if (!params
->rate_den
) {
310 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
311 if (snd_interval_single(i
)) {
312 params
->rate_num
= snd_interval_value(i
);
313 params
->rate_den
= 1;
317 hw
= &substream
->runtime
->hw
;
319 params
->info
= hw
->info
& ~SNDRV_PCM_INFO_FIFO_IN_FRAMES
;
320 if (!params
->fifo_size
) {
321 m
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
322 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
323 if (snd_mask_min(m
) == snd_mask_max(m
) &&
324 snd_interval_min(i
) == snd_interval_max(i
)) {
325 changed
= substream
->ops
->ioctl(substream
,
326 SNDRV_PCM_IOCTL1_FIFO_SIZE
, params
);
335 EXPORT_SYMBOL(snd_pcm_hw_refine
);
337 static int snd_pcm_hw_refine_user(struct snd_pcm_substream
*substream
,
338 struct snd_pcm_hw_params __user
* _params
)
340 struct snd_pcm_hw_params
*params
;
343 params
= memdup_user(_params
, sizeof(*params
));
345 return PTR_ERR(params
);
347 err
= snd_pcm_hw_refine(substream
, params
);
348 if (copy_to_user(_params
, params
, sizeof(*params
))) {
357 static int period_to_usecs(struct snd_pcm_runtime
*runtime
)
362 return -1; /* invalid */
364 /* take 75% of period time as the deadline */
365 usecs
= (750000 / runtime
->rate
) * runtime
->period_size
;
366 usecs
+= ((750000 % runtime
->rate
) * runtime
->period_size
) /
372 static void snd_pcm_set_state(struct snd_pcm_substream
*substream
, int state
)
374 snd_pcm_stream_lock_irq(substream
);
375 if (substream
->runtime
->status
->state
!= SNDRV_PCM_STATE_DISCONNECTED
)
376 substream
->runtime
->status
->state
= state
;
377 snd_pcm_stream_unlock_irq(substream
);
380 static int snd_pcm_hw_params(struct snd_pcm_substream
*substream
,
381 struct snd_pcm_hw_params
*params
)
383 struct snd_pcm_runtime
*runtime
;
386 snd_pcm_uframes_t frames
;
388 if (PCM_RUNTIME_CHECK(substream
))
390 runtime
= substream
->runtime
;
391 snd_pcm_stream_lock_irq(substream
);
392 switch (runtime
->status
->state
) {
393 case SNDRV_PCM_STATE_OPEN
:
394 case SNDRV_PCM_STATE_SETUP
:
395 case SNDRV_PCM_STATE_PREPARED
:
398 snd_pcm_stream_unlock_irq(substream
);
401 snd_pcm_stream_unlock_irq(substream
);
402 #if IS_ENABLED(CONFIG_SND_PCM_OSS)
403 if (!substream
->oss
.oss
)
405 if (atomic_read(&substream
->mmap_count
))
409 err
= snd_pcm_hw_refine(substream
, params
);
413 err
= snd_pcm_hw_params_choose(substream
, params
);
417 if (substream
->ops
->hw_params
!= NULL
) {
418 err
= substream
->ops
->hw_params(substream
, params
);
423 runtime
->access
= params_access(params
);
424 runtime
->format
= params_format(params
);
425 runtime
->subformat
= params_subformat(params
);
426 runtime
->channels
= params_channels(params
);
427 runtime
->rate
= params_rate(params
);
428 runtime
->period_size
= params_period_size(params
);
429 runtime
->periods
= params_periods(params
);
430 runtime
->buffer_size
= params_buffer_size(params
);
431 runtime
->info
= params
->info
;
432 runtime
->rate_num
= params
->rate_num
;
433 runtime
->rate_den
= params
->rate_den
;
434 runtime
->no_period_wakeup
=
435 (params
->info
& SNDRV_PCM_INFO_NO_PERIOD_WAKEUP
) &&
436 (params
->flags
& SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP
);
438 bits
= snd_pcm_format_physical_width(runtime
->format
);
439 runtime
->sample_bits
= bits
;
440 bits
*= runtime
->channels
;
441 runtime
->frame_bits
= bits
;
443 while (bits
% 8 != 0) {
447 runtime
->byte_align
= bits
/ 8;
448 runtime
->min_align
= frames
;
450 /* Default sw params */
451 runtime
->tstamp_mode
= SNDRV_PCM_TSTAMP_NONE
;
452 runtime
->period_step
= 1;
453 runtime
->control
->avail_min
= runtime
->period_size
;
454 runtime
->start_threshold
= 1;
455 runtime
->stop_threshold
= runtime
->buffer_size
;
456 runtime
->silence_threshold
= 0;
457 runtime
->silence_size
= 0;
458 runtime
->boundary
= runtime
->buffer_size
;
459 while (runtime
->boundary
* 2 <= LONG_MAX
- runtime
->buffer_size
)
460 runtime
->boundary
*= 2;
462 snd_pcm_timer_resolution_change(substream
);
463 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_SETUP
);
465 if (pm_qos_request_active(&substream
->latency_pm_qos_req
))
466 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
467 if ((usecs
= period_to_usecs(runtime
)) >= 0)
468 pm_qos_add_request(&substream
->latency_pm_qos_req
,
469 PM_QOS_CPU_DMA_LATENCY
, usecs
);
472 /* hardware might be unusable from this time,
473 so we force application to retry to set
474 the correct hardware parameter settings */
475 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_OPEN
);
476 if (substream
->ops
->hw_free
!= NULL
)
477 substream
->ops
->hw_free(substream
);
481 static int snd_pcm_hw_params_user(struct snd_pcm_substream
*substream
,
482 struct snd_pcm_hw_params __user
* _params
)
484 struct snd_pcm_hw_params
*params
;
487 params
= memdup_user(_params
, sizeof(*params
));
489 return PTR_ERR(params
);
491 err
= snd_pcm_hw_params(substream
, params
);
492 if (copy_to_user(_params
, params
, sizeof(*params
))) {
501 static int snd_pcm_hw_free(struct snd_pcm_substream
*substream
)
503 struct snd_pcm_runtime
*runtime
;
506 if (PCM_RUNTIME_CHECK(substream
))
508 runtime
= substream
->runtime
;
509 snd_pcm_stream_lock_irq(substream
);
510 switch (runtime
->status
->state
) {
511 case SNDRV_PCM_STATE_SETUP
:
512 case SNDRV_PCM_STATE_PREPARED
:
515 snd_pcm_stream_unlock_irq(substream
);
518 snd_pcm_stream_unlock_irq(substream
);
519 if (atomic_read(&substream
->mmap_count
))
521 if (substream
->ops
->hw_free
)
522 result
= substream
->ops
->hw_free(substream
);
523 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_OPEN
);
524 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
528 static int snd_pcm_sw_params(struct snd_pcm_substream
*substream
,
529 struct snd_pcm_sw_params
*params
)
531 struct snd_pcm_runtime
*runtime
;
534 if (PCM_RUNTIME_CHECK(substream
))
536 runtime
= substream
->runtime
;
537 snd_pcm_stream_lock_irq(substream
);
538 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
539 snd_pcm_stream_unlock_irq(substream
);
542 snd_pcm_stream_unlock_irq(substream
);
544 if (params
->tstamp_mode
> SNDRV_PCM_TSTAMP_LAST
)
546 if (params
->proto
>= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
547 params
->tstamp_type
> SNDRV_PCM_TSTAMP_TYPE_LAST
)
549 if (params
->avail_min
== 0)
551 if (params
->silence_size
>= runtime
->boundary
) {
552 if (params
->silence_threshold
!= 0)
555 if (params
->silence_size
> params
->silence_threshold
)
557 if (params
->silence_threshold
> runtime
->buffer_size
)
561 snd_pcm_stream_lock_irq(substream
);
562 runtime
->tstamp_mode
= params
->tstamp_mode
;
563 if (params
->proto
>= SNDRV_PROTOCOL_VERSION(2, 0, 12))
564 runtime
->tstamp_type
= params
->tstamp_type
;
565 runtime
->period_step
= params
->period_step
;
566 runtime
->control
->avail_min
= params
->avail_min
;
567 runtime
->start_threshold
= params
->start_threshold
;
568 runtime
->stop_threshold
= params
->stop_threshold
;
569 runtime
->silence_threshold
= params
->silence_threshold
;
570 runtime
->silence_size
= params
->silence_size
;
571 params
->boundary
= runtime
->boundary
;
572 if (snd_pcm_running(substream
)) {
573 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
574 runtime
->silence_size
> 0)
575 snd_pcm_playback_silence(substream
, ULONG_MAX
);
576 err
= snd_pcm_update_state(substream
, runtime
);
578 snd_pcm_stream_unlock_irq(substream
);
582 static int snd_pcm_sw_params_user(struct snd_pcm_substream
*substream
,
583 struct snd_pcm_sw_params __user
* _params
)
585 struct snd_pcm_sw_params params
;
587 if (copy_from_user(¶ms
, _params
, sizeof(params
)))
589 err
= snd_pcm_sw_params(substream
, ¶ms
);
590 if (copy_to_user(_params
, ¶ms
, sizeof(params
)))
595 int snd_pcm_status(struct snd_pcm_substream
*substream
,
596 struct snd_pcm_status
*status
)
598 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
600 snd_pcm_stream_lock_irq(substream
);
601 status
->state
= runtime
->status
->state
;
602 status
->suspended_state
= runtime
->status
->suspended_state
;
603 if (status
->state
== SNDRV_PCM_STATE_OPEN
)
605 status
->trigger_tstamp
= runtime
->trigger_tstamp
;
606 if (snd_pcm_running(substream
)) {
607 snd_pcm_update_hw_ptr(substream
);
608 if (runtime
->tstamp_mode
== SNDRV_PCM_TSTAMP_ENABLE
) {
609 status
->tstamp
= runtime
->status
->tstamp
;
610 status
->audio_tstamp
=
611 runtime
->status
->audio_tstamp
;
615 snd_pcm_gettime(runtime
, &status
->tstamp
);
617 status
->appl_ptr
= runtime
->control
->appl_ptr
;
618 status
->hw_ptr
= runtime
->status
->hw_ptr
;
619 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
620 status
->avail
= snd_pcm_playback_avail(runtime
);
621 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
||
622 runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
623 status
->delay
= runtime
->buffer_size
- status
->avail
;
624 status
->delay
+= runtime
->delay
;
628 status
->avail
= snd_pcm_capture_avail(runtime
);
629 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
)
630 status
->delay
= status
->avail
+ runtime
->delay
;
634 status
->avail_max
= runtime
->avail_max
;
635 status
->overrange
= runtime
->overrange
;
636 runtime
->avail_max
= 0;
637 runtime
->overrange
= 0;
639 snd_pcm_stream_unlock_irq(substream
);
643 static int snd_pcm_status_user(struct snd_pcm_substream
*substream
,
644 struct snd_pcm_status __user
* _status
)
646 struct snd_pcm_status status
;
649 memset(&status
, 0, sizeof(status
));
650 res
= snd_pcm_status(substream
, &status
);
653 if (copy_to_user(_status
, &status
, sizeof(status
)))
658 static int snd_pcm_channel_info(struct snd_pcm_substream
*substream
,
659 struct snd_pcm_channel_info
* info
)
661 struct snd_pcm_runtime
*runtime
;
662 unsigned int channel
;
664 channel
= info
->channel
;
665 runtime
= substream
->runtime
;
666 snd_pcm_stream_lock_irq(substream
);
667 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
668 snd_pcm_stream_unlock_irq(substream
);
671 snd_pcm_stream_unlock_irq(substream
);
672 if (channel
>= runtime
->channels
)
674 memset(info
, 0, sizeof(*info
));
675 info
->channel
= channel
;
676 return substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_CHANNEL_INFO
, info
);
679 static int snd_pcm_channel_info_user(struct snd_pcm_substream
*substream
,
680 struct snd_pcm_channel_info __user
* _info
)
682 struct snd_pcm_channel_info info
;
685 if (copy_from_user(&info
, _info
, sizeof(info
)))
687 res
= snd_pcm_channel_info(substream
, &info
);
690 if (copy_to_user(_info
, &info
, sizeof(info
)))
695 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream
*substream
)
697 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
698 if (runtime
->trigger_master
== NULL
)
700 if (runtime
->trigger_master
== substream
) {
701 snd_pcm_gettime(runtime
, &runtime
->trigger_tstamp
);
703 snd_pcm_trigger_tstamp(runtime
->trigger_master
);
704 runtime
->trigger_tstamp
= runtime
->trigger_master
->runtime
->trigger_tstamp
;
706 runtime
->trigger_master
= NULL
;
710 int (*pre_action
)(struct snd_pcm_substream
*substream
, int state
);
711 int (*do_action
)(struct snd_pcm_substream
*substream
, int state
);
712 void (*undo_action
)(struct snd_pcm_substream
*substream
, int state
);
713 void (*post_action
)(struct snd_pcm_substream
*substream
, int state
);
717 * this functions is core for handling of linked stream
718 * Note: the stream state might be changed also on failure
719 * Note2: call with calling stream lock + link lock
721 static int snd_pcm_action_group(struct action_ops
*ops
,
722 struct snd_pcm_substream
*substream
,
723 int state
, int do_lock
)
725 struct snd_pcm_substream
*s
= NULL
;
726 struct snd_pcm_substream
*s1
;
729 snd_pcm_group_for_each_entry(s
, substream
) {
730 if (do_lock
&& s
!= substream
)
731 spin_lock_nested(&s
->self_group
.lock
,
732 SINGLE_DEPTH_NESTING
);
733 res
= ops
->pre_action(s
, state
);
737 snd_pcm_group_for_each_entry(s
, substream
) {
738 res
= ops
->do_action(s
, state
);
740 if (ops
->undo_action
) {
741 snd_pcm_group_for_each_entry(s1
, substream
) {
742 if (s1
== s
) /* failed stream */
744 ops
->undo_action(s1
, state
);
747 s
= NULL
; /* unlock all */
751 snd_pcm_group_for_each_entry(s
, substream
) {
752 ops
->post_action(s
, state
);
757 snd_pcm_group_for_each_entry(s1
, substream
) {
759 spin_unlock(&s1
->self_group
.lock
);
760 if (s1
== s
) /* end */
768 * Note: call with stream lock
770 static int snd_pcm_action_single(struct action_ops
*ops
,
771 struct snd_pcm_substream
*substream
,
776 res
= ops
->pre_action(substream
, state
);
779 res
= ops
->do_action(substream
, state
);
781 ops
->post_action(substream
, state
);
782 else if (ops
->undo_action
)
783 ops
->undo_action(substream
, state
);
788 * Note: call with stream lock
790 static int snd_pcm_action(struct action_ops
*ops
,
791 struct snd_pcm_substream
*substream
,
796 if (snd_pcm_stream_linked(substream
)) {
797 if (!spin_trylock(&substream
->group
->lock
)) {
798 spin_unlock(&substream
->self_group
.lock
);
799 spin_lock(&substream
->group
->lock
);
800 spin_lock(&substream
->self_group
.lock
);
802 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
803 spin_unlock(&substream
->group
->lock
);
805 res
= snd_pcm_action_single(ops
, substream
, state
);
811 * Note: don't use any locks before
813 static int snd_pcm_action_lock_irq(struct action_ops
*ops
,
814 struct snd_pcm_substream
*substream
,
819 read_lock_irq(&snd_pcm_link_rwlock
);
820 if (snd_pcm_stream_linked(substream
)) {
821 spin_lock(&substream
->group
->lock
);
822 spin_lock(&substream
->self_group
.lock
);
823 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
824 spin_unlock(&substream
->self_group
.lock
);
825 spin_unlock(&substream
->group
->lock
);
827 spin_lock(&substream
->self_group
.lock
);
828 res
= snd_pcm_action_single(ops
, substream
, state
);
829 spin_unlock(&substream
->self_group
.lock
);
831 read_unlock_irq(&snd_pcm_link_rwlock
);
837 static int snd_pcm_action_nonatomic(struct action_ops
*ops
,
838 struct snd_pcm_substream
*substream
,
843 down_read(&snd_pcm_link_rwsem
);
844 if (snd_pcm_stream_linked(substream
))
845 res
= snd_pcm_action_group(ops
, substream
, state
, 0);
847 res
= snd_pcm_action_single(ops
, substream
, state
);
848 up_read(&snd_pcm_link_rwsem
);
855 static int snd_pcm_pre_start(struct snd_pcm_substream
*substream
, int state
)
857 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
858 if (runtime
->status
->state
!= SNDRV_PCM_STATE_PREPARED
)
860 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
861 !snd_pcm_playback_data(substream
))
863 runtime
->trigger_master
= substream
;
867 static int snd_pcm_do_start(struct snd_pcm_substream
*substream
, int state
)
869 if (substream
->runtime
->trigger_master
!= substream
)
871 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_START
);
874 static void snd_pcm_undo_start(struct snd_pcm_substream
*substream
, int state
)
876 if (substream
->runtime
->trigger_master
== substream
)
877 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
880 static void snd_pcm_post_start(struct snd_pcm_substream
*substream
, int state
)
882 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
883 snd_pcm_trigger_tstamp(substream
);
884 runtime
->hw_ptr_jiffies
= jiffies
;
885 runtime
->hw_ptr_buffer_jiffies
= (runtime
->buffer_size
* HZ
) /
887 runtime
->status
->state
= state
;
888 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
889 runtime
->silence_size
> 0)
890 snd_pcm_playback_silence(substream
, ULONG_MAX
);
891 if (substream
->timer
)
892 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTART
,
893 &runtime
->trigger_tstamp
);
896 static struct action_ops snd_pcm_action_start
= {
897 .pre_action
= snd_pcm_pre_start
,
898 .do_action
= snd_pcm_do_start
,
899 .undo_action
= snd_pcm_undo_start
,
900 .post_action
= snd_pcm_post_start
904 * snd_pcm_start - start all linked streams
905 * @substream: the PCM substream instance
907 * Return: Zero if successful, or a negative error code.
909 int snd_pcm_start(struct snd_pcm_substream
*substream
)
911 return snd_pcm_action(&snd_pcm_action_start
, substream
,
912 SNDRV_PCM_STATE_RUNNING
);
918 static int snd_pcm_pre_stop(struct snd_pcm_substream
*substream
, int state
)
920 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
921 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
923 runtime
->trigger_master
= substream
;
927 static int snd_pcm_do_stop(struct snd_pcm_substream
*substream
, int state
)
929 if (substream
->runtime
->trigger_master
== substream
&&
930 snd_pcm_running(substream
))
931 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
932 return 0; /* unconditonally stop all substreams */
935 static void snd_pcm_post_stop(struct snd_pcm_substream
*substream
, int state
)
937 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
938 if (runtime
->status
->state
!= state
) {
939 snd_pcm_trigger_tstamp(substream
);
940 if (substream
->timer
)
941 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTOP
,
942 &runtime
->trigger_tstamp
);
943 runtime
->status
->state
= state
;
945 wake_up(&runtime
->sleep
);
946 wake_up(&runtime
->tsleep
);
949 static struct action_ops snd_pcm_action_stop
= {
950 .pre_action
= snd_pcm_pre_stop
,
951 .do_action
= snd_pcm_do_stop
,
952 .post_action
= snd_pcm_post_stop
956 * snd_pcm_stop - try to stop all running streams in the substream group
957 * @substream: the PCM substream instance
958 * @state: PCM state after stopping the stream
960 * The state of each stream is then changed to the given state unconditionally.
962 * Return: Zero if successful, or a negative error code.
964 int snd_pcm_stop(struct snd_pcm_substream
*substream
, snd_pcm_state_t state
)
966 return snd_pcm_action(&snd_pcm_action_stop
, substream
, state
);
969 EXPORT_SYMBOL(snd_pcm_stop
);
972 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
973 * @substream: the PCM substream
975 * After stopping, the state is changed to SETUP.
976 * Unlike snd_pcm_stop(), this affects only the given stream.
978 * Return: Zero if succesful, or a negative error code.
980 int snd_pcm_drain_done(struct snd_pcm_substream
*substream
)
982 return snd_pcm_action_single(&snd_pcm_action_stop
, substream
,
983 SNDRV_PCM_STATE_SETUP
);
989 static int snd_pcm_pre_pause(struct snd_pcm_substream
*substream
, int push
)
991 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
992 if (!(runtime
->info
& SNDRV_PCM_INFO_PAUSE
))
995 if (runtime
->status
->state
!= SNDRV_PCM_STATE_RUNNING
)
997 } else if (runtime
->status
->state
!= SNDRV_PCM_STATE_PAUSED
)
999 runtime
->trigger_master
= substream
;
1003 static int snd_pcm_do_pause(struct snd_pcm_substream
*substream
, int push
)
1005 if (substream
->runtime
->trigger_master
!= substream
)
1007 /* some drivers might use hw_ptr to recover from the pause -
1008 update the hw_ptr now */
1010 snd_pcm_update_hw_ptr(substream
);
1011 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1012 * a delta between the current jiffies, this gives a large enough
1013 * delta, effectively to skip the check once.
1015 substream
->runtime
->hw_ptr_jiffies
= jiffies
- HZ
* 1000;
1016 return substream
->ops
->trigger(substream
,
1017 push
? SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
1018 SNDRV_PCM_TRIGGER_PAUSE_RELEASE
);
1021 static void snd_pcm_undo_pause(struct snd_pcm_substream
*substream
, int push
)
1023 if (substream
->runtime
->trigger_master
== substream
)
1024 substream
->ops
->trigger(substream
,
1025 push
? SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1026 SNDRV_PCM_TRIGGER_PAUSE_PUSH
);
1029 static void snd_pcm_post_pause(struct snd_pcm_substream
*substream
, int push
)
1031 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1032 snd_pcm_trigger_tstamp(substream
);
1034 runtime
->status
->state
= SNDRV_PCM_STATE_PAUSED
;
1035 if (substream
->timer
)
1036 snd_timer_notify(substream
->timer
,
1037 SNDRV_TIMER_EVENT_MPAUSE
,
1038 &runtime
->trigger_tstamp
);
1039 wake_up(&runtime
->sleep
);
1040 wake_up(&runtime
->tsleep
);
1042 runtime
->status
->state
= SNDRV_PCM_STATE_RUNNING
;
1043 if (substream
->timer
)
1044 snd_timer_notify(substream
->timer
,
1045 SNDRV_TIMER_EVENT_MCONTINUE
,
1046 &runtime
->trigger_tstamp
);
1050 static struct action_ops snd_pcm_action_pause
= {
1051 .pre_action
= snd_pcm_pre_pause
,
1052 .do_action
= snd_pcm_do_pause
,
1053 .undo_action
= snd_pcm_undo_pause
,
1054 .post_action
= snd_pcm_post_pause
1058 * Push/release the pause for all linked streams.
1060 static int snd_pcm_pause(struct snd_pcm_substream
*substream
, int push
)
1062 return snd_pcm_action(&snd_pcm_action_pause
, substream
, push
);
1068 static int snd_pcm_pre_suspend(struct snd_pcm_substream
*substream
, int state
)
1070 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1071 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1073 runtime
->trigger_master
= substream
;
1077 static int snd_pcm_do_suspend(struct snd_pcm_substream
*substream
, int state
)
1079 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1080 if (runtime
->trigger_master
!= substream
)
1082 if (! snd_pcm_running(substream
))
1084 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1085 return 0; /* suspend unconditionally */
1088 static void snd_pcm_post_suspend(struct snd_pcm_substream
*substream
, int state
)
1090 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1091 snd_pcm_trigger_tstamp(substream
);
1092 if (substream
->timer
)
1093 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSUSPEND
,
1094 &runtime
->trigger_tstamp
);
1095 runtime
->status
->suspended_state
= runtime
->status
->state
;
1096 runtime
->status
->state
= SNDRV_PCM_STATE_SUSPENDED
;
1097 wake_up(&runtime
->sleep
);
1098 wake_up(&runtime
->tsleep
);
1101 static struct action_ops snd_pcm_action_suspend
= {
1102 .pre_action
= snd_pcm_pre_suspend
,
1103 .do_action
= snd_pcm_do_suspend
,
1104 .post_action
= snd_pcm_post_suspend
1108 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1109 * @substream: the PCM substream
1111 * After this call, all streams are changed to SUSPENDED state.
1113 * Return: Zero if successful (or @substream is %NULL), or a negative error
1116 int snd_pcm_suspend(struct snd_pcm_substream
*substream
)
1119 unsigned long flags
;
1124 snd_pcm_stream_lock_irqsave(substream
, flags
);
1125 err
= snd_pcm_action(&snd_pcm_action_suspend
, substream
, 0);
1126 snd_pcm_stream_unlock_irqrestore(substream
, flags
);
1130 EXPORT_SYMBOL(snd_pcm_suspend
);
1133 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1134 * @pcm: the PCM instance
1136 * After this call, all streams are changed to SUSPENDED state.
1138 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1140 int snd_pcm_suspend_all(struct snd_pcm
*pcm
)
1142 struct snd_pcm_substream
*substream
;
1143 int stream
, err
= 0;
1148 for (stream
= 0; stream
< 2; stream
++) {
1149 for (substream
= pcm
->streams
[stream
].substream
;
1150 substream
; substream
= substream
->next
) {
1151 /* FIXME: the open/close code should lock this as well */
1152 if (substream
->runtime
== NULL
)
1154 err
= snd_pcm_suspend(substream
);
1155 if (err
< 0 && err
!= -EBUSY
)
1162 EXPORT_SYMBOL(snd_pcm_suspend_all
);
1166 static int snd_pcm_pre_resume(struct snd_pcm_substream
*substream
, int state
)
1168 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1169 if (!(runtime
->info
& SNDRV_PCM_INFO_RESUME
))
1171 runtime
->trigger_master
= substream
;
1175 static int snd_pcm_do_resume(struct snd_pcm_substream
*substream
, int state
)
1177 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1178 if (runtime
->trigger_master
!= substream
)
1180 /* DMA not running previously? */
1181 if (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_RUNNING
&&
1182 (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_DRAINING
||
1183 substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
1185 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_RESUME
);
1188 static void snd_pcm_undo_resume(struct snd_pcm_substream
*substream
, int state
)
1190 if (substream
->runtime
->trigger_master
== substream
&&
1191 snd_pcm_running(substream
))
1192 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1195 static void snd_pcm_post_resume(struct snd_pcm_substream
*substream
, int state
)
1197 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1198 snd_pcm_trigger_tstamp(substream
);
1199 if (substream
->timer
)
1200 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MRESUME
,
1201 &runtime
->trigger_tstamp
);
1202 runtime
->status
->state
= runtime
->status
->suspended_state
;
1205 static struct action_ops snd_pcm_action_resume
= {
1206 .pre_action
= snd_pcm_pre_resume
,
1207 .do_action
= snd_pcm_do_resume
,
1208 .undo_action
= snd_pcm_undo_resume
,
1209 .post_action
= snd_pcm_post_resume
1212 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1214 struct snd_card
*card
= substream
->pcm
->card
;
1217 snd_power_lock(card
);
1218 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1219 res
= snd_pcm_action_lock_irq(&snd_pcm_action_resume
, substream
, 0);
1220 snd_power_unlock(card
);
1226 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1231 #endif /* CONFIG_PM */
1236 * Change the RUNNING stream(s) to XRUN state.
1238 static int snd_pcm_xrun(struct snd_pcm_substream
*substream
)
1240 struct snd_card
*card
= substream
->pcm
->card
;
1241 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1244 snd_power_lock(card
);
1245 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1246 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1251 snd_pcm_stream_lock_irq(substream
);
1252 switch (runtime
->status
->state
) {
1253 case SNDRV_PCM_STATE_XRUN
:
1254 result
= 0; /* already there */
1256 case SNDRV_PCM_STATE_RUNNING
:
1257 result
= snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
1262 snd_pcm_stream_unlock_irq(substream
);
1264 snd_power_unlock(card
);
1271 static int snd_pcm_pre_reset(struct snd_pcm_substream
*substream
, int state
)
1273 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1274 switch (runtime
->status
->state
) {
1275 case SNDRV_PCM_STATE_RUNNING
:
1276 case SNDRV_PCM_STATE_PREPARED
:
1277 case SNDRV_PCM_STATE_PAUSED
:
1278 case SNDRV_PCM_STATE_SUSPENDED
:
1285 static int snd_pcm_do_reset(struct snd_pcm_substream
*substream
, int state
)
1287 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1288 int err
= substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_RESET
, NULL
);
1291 runtime
->hw_ptr_base
= 0;
1292 runtime
->hw_ptr_interrupt
= runtime
->status
->hw_ptr
-
1293 runtime
->status
->hw_ptr
% runtime
->period_size
;
1294 runtime
->silence_start
= runtime
->status
->hw_ptr
;
1295 runtime
->silence_filled
= 0;
1299 static void snd_pcm_post_reset(struct snd_pcm_substream
*substream
, int state
)
1301 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1302 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1303 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
1304 runtime
->silence_size
> 0)
1305 snd_pcm_playback_silence(substream
, ULONG_MAX
);
1308 static struct action_ops snd_pcm_action_reset
= {
1309 .pre_action
= snd_pcm_pre_reset
,
1310 .do_action
= snd_pcm_do_reset
,
1311 .post_action
= snd_pcm_post_reset
1314 static int snd_pcm_reset(struct snd_pcm_substream
*substream
)
1316 return snd_pcm_action_nonatomic(&snd_pcm_action_reset
, substream
, 0);
1322 /* we use the second argument for updating f_flags */
1323 static int snd_pcm_pre_prepare(struct snd_pcm_substream
*substream
,
1326 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1327 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1328 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
)
1330 if (snd_pcm_running(substream
))
1332 substream
->f_flags
= f_flags
;
1336 static int snd_pcm_do_prepare(struct snd_pcm_substream
*substream
, int state
)
1339 err
= substream
->ops
->prepare(substream
);
1342 return snd_pcm_do_reset(substream
, 0);
1345 static void snd_pcm_post_prepare(struct snd_pcm_substream
*substream
, int state
)
1347 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1348 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1349 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_PREPARED
);
1352 static struct action_ops snd_pcm_action_prepare
= {
1353 .pre_action
= snd_pcm_pre_prepare
,
1354 .do_action
= snd_pcm_do_prepare
,
1355 .post_action
= snd_pcm_post_prepare
1359 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1360 * @substream: the PCM substream instance
1361 * @file: file to refer f_flags
1363 * Return: Zero if successful, or a negative error code.
1365 static int snd_pcm_prepare(struct snd_pcm_substream
*substream
,
1369 struct snd_card
*card
= substream
->pcm
->card
;
1373 f_flags
= file
->f_flags
;
1375 f_flags
= substream
->f_flags
;
1377 snd_power_lock(card
);
1378 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1379 res
= snd_pcm_action_nonatomic(&snd_pcm_action_prepare
,
1380 substream
, f_flags
);
1381 snd_power_unlock(card
);
1389 static int snd_pcm_pre_drain_init(struct snd_pcm_substream
*substream
, int state
)
1391 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1392 switch (runtime
->status
->state
) {
1393 case SNDRV_PCM_STATE_OPEN
:
1394 case SNDRV_PCM_STATE_DISCONNECTED
:
1395 case SNDRV_PCM_STATE_SUSPENDED
:
1398 runtime
->trigger_master
= substream
;
1402 static int snd_pcm_do_drain_init(struct snd_pcm_substream
*substream
, int state
)
1404 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1405 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
1406 switch (runtime
->status
->state
) {
1407 case SNDRV_PCM_STATE_PREPARED
:
1408 /* start playback stream if possible */
1409 if (! snd_pcm_playback_empty(substream
)) {
1410 snd_pcm_do_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1411 snd_pcm_post_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1414 case SNDRV_PCM_STATE_RUNNING
:
1415 runtime
->status
->state
= SNDRV_PCM_STATE_DRAINING
;
1417 case SNDRV_PCM_STATE_XRUN
:
1418 runtime
->status
->state
= SNDRV_PCM_STATE_SETUP
;
1424 /* stop running stream */
1425 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
) {
1426 int new_state
= snd_pcm_capture_avail(runtime
) > 0 ?
1427 SNDRV_PCM_STATE_DRAINING
: SNDRV_PCM_STATE_SETUP
;
1428 snd_pcm_do_stop(substream
, new_state
);
1429 snd_pcm_post_stop(substream
, new_state
);
1435 static void snd_pcm_post_drain_init(struct snd_pcm_substream
*substream
, int state
)
1439 static struct action_ops snd_pcm_action_drain_init
= {
1440 .pre_action
= snd_pcm_pre_drain_init
,
1441 .do_action
= snd_pcm_do_drain_init
,
1442 .post_action
= snd_pcm_post_drain_init
1445 static int snd_pcm_drop(struct snd_pcm_substream
*substream
);
1448 * Drain the stream(s).
1449 * When the substream is linked, sync until the draining of all playback streams
1451 * After this call, all streams are supposed to be either SETUP or DRAINING
1452 * (capture only) state.
1454 static int snd_pcm_drain(struct snd_pcm_substream
*substream
,
1457 struct snd_card
*card
;
1458 struct snd_pcm_runtime
*runtime
;
1459 struct snd_pcm_substream
*s
;
1464 card
= substream
->pcm
->card
;
1465 runtime
= substream
->runtime
;
1467 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1470 snd_power_lock(card
);
1471 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1472 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1474 snd_power_unlock(card
);
1480 if (file
->f_flags
& O_NONBLOCK
)
1482 } else if (substream
->f_flags
& O_NONBLOCK
)
1485 down_read(&snd_pcm_link_rwsem
);
1486 snd_pcm_stream_lock_irq(substream
);
1488 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1489 snd_pcm_pause(substream
, 0);
1491 /* pre-start/stop - all running streams are changed to DRAINING state */
1492 result
= snd_pcm_action(&snd_pcm_action_drain_init
, substream
, 0);
1495 /* in non-blocking, we don't wait in ioctl but let caller poll */
1503 struct snd_pcm_runtime
*to_check
;
1504 if (signal_pending(current
)) {
1505 result
= -ERESTARTSYS
;
1508 /* find a substream to drain */
1510 snd_pcm_group_for_each_entry(s
, substream
) {
1511 if (s
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
)
1513 runtime
= s
->runtime
;
1514 if (runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
1520 break; /* all drained */
1521 init_waitqueue_entry(&wait
, current
);
1522 add_wait_queue(&to_check
->sleep
, &wait
);
1523 snd_pcm_stream_unlock_irq(substream
);
1524 up_read(&snd_pcm_link_rwsem
);
1525 snd_power_unlock(card
);
1526 if (runtime
->no_period_wakeup
)
1527 tout
= MAX_SCHEDULE_TIMEOUT
;
1530 if (runtime
->rate
) {
1531 long t
= runtime
->period_size
* 2 / runtime
->rate
;
1532 tout
= max(t
, tout
);
1534 tout
= msecs_to_jiffies(tout
* 1000);
1536 tout
= schedule_timeout_interruptible(tout
);
1537 snd_power_lock(card
);
1538 down_read(&snd_pcm_link_rwsem
);
1539 snd_pcm_stream_lock_irq(substream
);
1540 remove_wait_queue(&to_check
->sleep
, &wait
);
1541 if (card
->shutdown
) {
1546 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1549 dev_dbg(substream
->pcm
->card
->dev
,
1550 "playback drain error (DMA or IRQ trouble?)\n");
1551 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1559 snd_pcm_stream_unlock_irq(substream
);
1560 up_read(&snd_pcm_link_rwsem
);
1561 snd_power_unlock(card
);
1569 * Immediately put all linked substreams into SETUP state.
1571 static int snd_pcm_drop(struct snd_pcm_substream
*substream
)
1573 struct snd_pcm_runtime
*runtime
;
1576 if (PCM_RUNTIME_CHECK(substream
))
1578 runtime
= substream
->runtime
;
1580 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1581 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
||
1582 runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1585 snd_pcm_stream_lock_irq(substream
);
1587 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1588 snd_pcm_pause(substream
, 0);
1590 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1591 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1592 snd_pcm_stream_unlock_irq(substream
);
1598 static bool is_pcm_file(struct file
*file
)
1600 struct inode
*inode
= file_inode(file
);
1603 if (!S_ISCHR(inode
->i_mode
) || imajor(inode
) != snd_major
)
1605 minor
= iminor(inode
);
1606 return snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_PLAYBACK
) ||
1607 snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
1613 static int snd_pcm_link(struct snd_pcm_substream
*substream
, int fd
)
1616 struct snd_pcm_file
*pcm_file
;
1617 struct snd_pcm_substream
*substream1
;
1618 struct snd_pcm_group
*group
;
1619 struct fd f
= fdget(fd
);
1623 if (!is_pcm_file(f
.file
)) {
1627 pcm_file
= f
.file
->private_data
;
1628 substream1
= pcm_file
->substream
;
1629 group
= kmalloc(sizeof(*group
), GFP_KERNEL
);
1634 down_write(&snd_pcm_link_rwsem
);
1635 write_lock_irq(&snd_pcm_link_rwlock
);
1636 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1637 substream
->runtime
->status
->state
!= substream1
->runtime
->status
->state
) {
1641 if (snd_pcm_stream_linked(substream1
)) {
1645 if (!snd_pcm_stream_linked(substream
)) {
1646 substream
->group
= group
;
1648 spin_lock_init(&substream
->group
->lock
);
1649 INIT_LIST_HEAD(&substream
->group
->substreams
);
1650 list_add_tail(&substream
->link_list
, &substream
->group
->substreams
);
1651 substream
->group
->count
= 1;
1653 list_add_tail(&substream1
->link_list
, &substream
->group
->substreams
);
1654 substream
->group
->count
++;
1655 substream1
->group
= substream
->group
;
1657 write_unlock_irq(&snd_pcm_link_rwlock
);
1658 up_write(&snd_pcm_link_rwsem
);
1660 snd_card_unref(substream1
->pcm
->card
);
1667 static void relink_to_local(struct snd_pcm_substream
*substream
)
1669 substream
->group
= &substream
->self_group
;
1670 INIT_LIST_HEAD(&substream
->self_group
.substreams
);
1671 list_add_tail(&substream
->link_list
, &substream
->self_group
.substreams
);
1674 static int snd_pcm_unlink(struct snd_pcm_substream
*substream
)
1676 struct snd_pcm_substream
*s
;
1679 down_write(&snd_pcm_link_rwsem
);
1680 write_lock_irq(&snd_pcm_link_rwlock
);
1681 if (!snd_pcm_stream_linked(substream
)) {
1685 list_del(&substream
->link_list
);
1686 substream
->group
->count
--;
1687 if (substream
->group
->count
== 1) { /* detach the last stream, too */
1688 snd_pcm_group_for_each_entry(s
, substream
) {
1692 kfree(substream
->group
);
1694 relink_to_local(substream
);
1696 write_unlock_irq(&snd_pcm_link_rwlock
);
1697 up_write(&snd_pcm_link_rwsem
);
1704 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params
*params
,
1705 struct snd_pcm_hw_rule
*rule
)
1707 struct snd_interval t
;
1708 snd_interval_mul(hw_param_interval_c(params
, rule
->deps
[0]),
1709 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1710 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1713 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params
*params
,
1714 struct snd_pcm_hw_rule
*rule
)
1716 struct snd_interval t
;
1717 snd_interval_div(hw_param_interval_c(params
, rule
->deps
[0]),
1718 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1719 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1722 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params
*params
,
1723 struct snd_pcm_hw_rule
*rule
)
1725 struct snd_interval t
;
1726 snd_interval_muldivk(hw_param_interval_c(params
, rule
->deps
[0]),
1727 hw_param_interval_c(params
, rule
->deps
[1]),
1728 (unsigned long) rule
->private, &t
);
1729 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1732 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params
*params
,
1733 struct snd_pcm_hw_rule
*rule
)
1735 struct snd_interval t
;
1736 snd_interval_mulkdiv(hw_param_interval_c(params
, rule
->deps
[0]),
1737 (unsigned long) rule
->private,
1738 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1739 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1742 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params
*params
,
1743 struct snd_pcm_hw_rule
*rule
)
1746 struct snd_interval
*i
= hw_param_interval(params
, rule
->deps
[0]);
1748 struct snd_mask
*mask
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1750 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1752 if (! snd_mask_test(mask
, k
))
1754 bits
= snd_pcm_format_physical_width(k
);
1756 continue; /* ignore invalid formats */
1757 if ((unsigned)bits
< i
->min
|| (unsigned)bits
> i
->max
)
1758 snd_mask_reset(&m
, k
);
1760 return snd_mask_refine(mask
, &m
);
1763 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params
*params
,
1764 struct snd_pcm_hw_rule
*rule
)
1766 struct snd_interval t
;
1772 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1774 if (! snd_mask_test(hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
), k
))
1776 bits
= snd_pcm_format_physical_width(k
);
1778 continue; /* ignore invalid formats */
1779 if (t
.min
> (unsigned)bits
)
1781 if (t
.max
< (unsigned)bits
)
1785 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1788 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1789 #error "Change this table"
1792 static unsigned int rates
[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1793 48000, 64000, 88200, 96000, 176400, 192000 };
1795 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates
= {
1796 .count
= ARRAY_SIZE(rates
),
1800 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params
*params
,
1801 struct snd_pcm_hw_rule
*rule
)
1803 struct snd_pcm_hardware
*hw
= rule
->private;
1804 return snd_interval_list(hw_param_interval(params
, rule
->var
),
1805 snd_pcm_known_rates
.count
,
1806 snd_pcm_known_rates
.list
, hw
->rates
);
1809 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params
*params
,
1810 struct snd_pcm_hw_rule
*rule
)
1812 struct snd_interval t
;
1813 struct snd_pcm_substream
*substream
= rule
->private;
1815 t
.max
= substream
->buffer_bytes_max
;
1819 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1822 int snd_pcm_hw_constraints_init(struct snd_pcm_substream
*substream
)
1824 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1825 struct snd_pcm_hw_constraints
*constrs
= &runtime
->hw_constraints
;
1828 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
1829 snd_mask_any(constrs_mask(constrs
, k
));
1832 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
1833 snd_interval_any(constrs_interval(constrs
, k
));
1836 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_CHANNELS
));
1837 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
));
1838 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
));
1839 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
));
1840 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_FRAME_BITS
));
1842 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1843 snd_pcm_hw_rule_format
, NULL
,
1844 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1847 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1848 snd_pcm_hw_rule_sample_bits
, NULL
,
1849 SNDRV_PCM_HW_PARAM_FORMAT
,
1850 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1853 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1854 snd_pcm_hw_rule_div
, NULL
,
1855 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1858 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1859 snd_pcm_hw_rule_mul
, NULL
,
1860 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1863 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1864 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1865 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1868 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1869 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1870 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, -1);
1873 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
1874 snd_pcm_hw_rule_div
, NULL
,
1875 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1878 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1879 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1880 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
, -1);
1883 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1884 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1885 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_BUFFER_TIME
, -1);
1888 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIODS
,
1889 snd_pcm_hw_rule_div
, NULL
,
1890 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1893 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1894 snd_pcm_hw_rule_div
, NULL
,
1895 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1898 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1899 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1900 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1903 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1904 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1905 SNDRV_PCM_HW_PARAM_PERIOD_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1908 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1909 snd_pcm_hw_rule_mul
, NULL
,
1910 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1913 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1914 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1915 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1918 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1919 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1920 SNDRV_PCM_HW_PARAM_BUFFER_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1923 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1924 snd_pcm_hw_rule_muldivk
, (void*) 8,
1925 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1928 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1929 snd_pcm_hw_rule_muldivk
, (void*) 8,
1930 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1933 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
1934 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1935 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1938 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME
,
1939 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1940 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1946 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream
*substream
)
1948 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1949 struct snd_pcm_hardware
*hw
= &runtime
->hw
;
1951 unsigned int mask
= 0;
1953 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1954 mask
|= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED
;
1955 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1956 mask
|= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
;
1957 if (hw
->info
& SNDRV_PCM_INFO_MMAP
) {
1958 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1959 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED
;
1960 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1961 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED
;
1962 if (hw
->info
& SNDRV_PCM_INFO_COMPLEX
)
1963 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX
;
1965 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_ACCESS
, mask
);
1969 err
= snd_pcm_hw_constraint_mask64(runtime
, SNDRV_PCM_HW_PARAM_FORMAT
, hw
->formats
);
1973 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_SUBFORMAT
, 1 << SNDRV_PCM_SUBFORMAT_STD
);
1977 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_CHANNELS
,
1978 hw
->channels_min
, hw
->channels_max
);
1982 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_RATE
,
1983 hw
->rate_min
, hw
->rate_max
);
1987 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1988 hw
->period_bytes_min
, hw
->period_bytes_max
);
1992 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIODS
,
1993 hw
->periods_min
, hw
->periods_max
);
1997 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1998 hw
->period_bytes_min
, hw
->buffer_bytes_max
);
2002 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
2003 snd_pcm_hw_rule_buffer_bytes_max
, substream
,
2004 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, -1);
2009 if (runtime
->dma_bytes
) {
2010 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, 0, runtime
->dma_bytes
);
2015 if (!(hw
->rates
& (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))) {
2016 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
2017 snd_pcm_hw_rule_rate
, hw
,
2018 SNDRV_PCM_HW_PARAM_RATE
, -1);
2023 /* FIXME: this belong to lowlevel */
2024 snd_pcm_hw_constraint_integer(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
);
2029 static void pcm_release_private(struct snd_pcm_substream
*substream
)
2031 snd_pcm_unlink(substream
);
2034 void snd_pcm_release_substream(struct snd_pcm_substream
*substream
)
2036 substream
->ref_count
--;
2037 if (substream
->ref_count
> 0)
2040 snd_pcm_drop(substream
);
2041 if (substream
->hw_opened
) {
2042 if (substream
->ops
->hw_free
!= NULL
)
2043 substream
->ops
->hw_free(substream
);
2044 substream
->ops
->close(substream
);
2045 substream
->hw_opened
= 0;
2047 if (pm_qos_request_active(&substream
->latency_pm_qos_req
))
2048 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
2049 if (substream
->pcm_release
) {
2050 substream
->pcm_release(substream
);
2051 substream
->pcm_release
= NULL
;
2053 snd_pcm_detach_substream(substream
);
2056 EXPORT_SYMBOL(snd_pcm_release_substream
);
2058 int snd_pcm_open_substream(struct snd_pcm
*pcm
, int stream
,
2060 struct snd_pcm_substream
**rsubstream
)
2062 struct snd_pcm_substream
*substream
;
2065 err
= snd_pcm_attach_substream(pcm
, stream
, file
, &substream
);
2068 if (substream
->ref_count
> 1) {
2069 *rsubstream
= substream
;
2073 err
= snd_pcm_hw_constraints_init(substream
);
2075 pcm_dbg(pcm
, "snd_pcm_hw_constraints_init failed\n");
2079 if ((err
= substream
->ops
->open(substream
)) < 0)
2082 substream
->hw_opened
= 1;
2084 err
= snd_pcm_hw_constraints_complete(substream
);
2086 pcm_dbg(pcm
, "snd_pcm_hw_constraints_complete failed\n");
2090 *rsubstream
= substream
;
2094 snd_pcm_release_substream(substream
);
2098 EXPORT_SYMBOL(snd_pcm_open_substream
);
2100 static int snd_pcm_open_file(struct file
*file
,
2101 struct snd_pcm
*pcm
,
2104 struct snd_pcm_file
*pcm_file
;
2105 struct snd_pcm_substream
*substream
;
2108 err
= snd_pcm_open_substream(pcm
, stream
, file
, &substream
);
2112 pcm_file
= kzalloc(sizeof(*pcm_file
), GFP_KERNEL
);
2113 if (pcm_file
== NULL
) {
2114 snd_pcm_release_substream(substream
);
2117 pcm_file
->substream
= substream
;
2118 if (substream
->ref_count
== 1) {
2119 substream
->file
= pcm_file
;
2120 substream
->pcm_release
= pcm_release_private
;
2122 file
->private_data
= pcm_file
;
2127 static int snd_pcm_playback_open(struct inode
*inode
, struct file
*file
)
2129 struct snd_pcm
*pcm
;
2130 int err
= nonseekable_open(inode
, file
);
2133 pcm
= snd_lookup_minor_data(iminor(inode
),
2134 SNDRV_DEVICE_TYPE_PCM_PLAYBACK
);
2135 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_PLAYBACK
);
2137 snd_card_unref(pcm
->card
);
2141 static int snd_pcm_capture_open(struct inode
*inode
, struct file
*file
)
2143 struct snd_pcm
*pcm
;
2144 int err
= nonseekable_open(inode
, file
);
2147 pcm
= snd_lookup_minor_data(iminor(inode
),
2148 SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
2149 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_CAPTURE
);
2151 snd_card_unref(pcm
->card
);
2155 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
)
2164 err
= snd_card_file_add(pcm
->card
, file
);
2167 if (!try_module_get(pcm
->card
->module
)) {
2171 init_waitqueue_entry(&wait
, current
);
2172 add_wait_queue(&pcm
->open_wait
, &wait
);
2173 mutex_lock(&pcm
->open_mutex
);
2175 err
= snd_pcm_open_file(file
, pcm
, stream
);
2178 if (err
== -EAGAIN
) {
2179 if (file
->f_flags
& O_NONBLOCK
) {
2185 set_current_state(TASK_INTERRUPTIBLE
);
2186 mutex_unlock(&pcm
->open_mutex
);
2188 mutex_lock(&pcm
->open_mutex
);
2189 if (pcm
->card
->shutdown
) {
2193 if (signal_pending(current
)) {
2198 remove_wait_queue(&pcm
->open_wait
, &wait
);
2199 mutex_unlock(&pcm
->open_mutex
);
2205 module_put(pcm
->card
->module
);
2207 snd_card_file_remove(pcm
->card
, file
);
2212 static int snd_pcm_release(struct inode
*inode
, struct file
*file
)
2214 struct snd_pcm
*pcm
;
2215 struct snd_pcm_substream
*substream
;
2216 struct snd_pcm_file
*pcm_file
;
2218 pcm_file
= file
->private_data
;
2219 substream
= pcm_file
->substream
;
2220 if (snd_BUG_ON(!substream
))
2222 pcm
= substream
->pcm
;
2223 mutex_lock(&pcm
->open_mutex
);
2224 snd_pcm_release_substream(substream
);
2226 mutex_unlock(&pcm
->open_mutex
);
2227 wake_up(&pcm
->open_wait
);
2228 module_put(pcm
->card
->module
);
2229 snd_card_file_remove(pcm
->card
, file
);
2233 static snd_pcm_sframes_t
snd_pcm_playback_rewind(struct snd_pcm_substream
*substream
,
2234 snd_pcm_uframes_t frames
)
2236 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2237 snd_pcm_sframes_t appl_ptr
;
2238 snd_pcm_sframes_t ret
;
2239 snd_pcm_sframes_t hw_avail
;
2244 snd_pcm_stream_lock_irq(substream
);
2245 switch (runtime
->status
->state
) {
2246 case SNDRV_PCM_STATE_PREPARED
:
2248 case SNDRV_PCM_STATE_DRAINING
:
2249 case SNDRV_PCM_STATE_RUNNING
:
2250 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2253 case SNDRV_PCM_STATE_XRUN
:
2256 case SNDRV_PCM_STATE_SUSPENDED
:
2264 hw_avail
= snd_pcm_playback_hw_avail(runtime
);
2265 if (hw_avail
<= 0) {
2269 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2271 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2273 appl_ptr
+= runtime
->boundary
;
2274 runtime
->control
->appl_ptr
= appl_ptr
;
2277 snd_pcm_stream_unlock_irq(substream
);
2281 static snd_pcm_sframes_t
snd_pcm_capture_rewind(struct snd_pcm_substream
*substream
,
2282 snd_pcm_uframes_t frames
)
2284 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2285 snd_pcm_sframes_t appl_ptr
;
2286 snd_pcm_sframes_t ret
;
2287 snd_pcm_sframes_t hw_avail
;
2292 snd_pcm_stream_lock_irq(substream
);
2293 switch (runtime
->status
->state
) {
2294 case SNDRV_PCM_STATE_PREPARED
:
2295 case SNDRV_PCM_STATE_DRAINING
:
2297 case SNDRV_PCM_STATE_RUNNING
:
2298 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2301 case SNDRV_PCM_STATE_XRUN
:
2304 case SNDRV_PCM_STATE_SUSPENDED
:
2312 hw_avail
= snd_pcm_capture_hw_avail(runtime
);
2313 if (hw_avail
<= 0) {
2317 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2319 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2321 appl_ptr
+= runtime
->boundary
;
2322 runtime
->control
->appl_ptr
= appl_ptr
;
2325 snd_pcm_stream_unlock_irq(substream
);
2329 static snd_pcm_sframes_t
snd_pcm_playback_forward(struct snd_pcm_substream
*substream
,
2330 snd_pcm_uframes_t frames
)
2332 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2333 snd_pcm_sframes_t appl_ptr
;
2334 snd_pcm_sframes_t ret
;
2335 snd_pcm_sframes_t avail
;
2340 snd_pcm_stream_lock_irq(substream
);
2341 switch (runtime
->status
->state
) {
2342 case SNDRV_PCM_STATE_PREPARED
:
2343 case SNDRV_PCM_STATE_PAUSED
:
2345 case SNDRV_PCM_STATE_DRAINING
:
2346 case SNDRV_PCM_STATE_RUNNING
:
2347 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2350 case SNDRV_PCM_STATE_XRUN
:
2353 case SNDRV_PCM_STATE_SUSPENDED
:
2361 avail
= snd_pcm_playback_avail(runtime
);
2366 if (frames
> (snd_pcm_uframes_t
)avail
)
2368 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2369 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2370 appl_ptr
-= runtime
->boundary
;
2371 runtime
->control
->appl_ptr
= appl_ptr
;
2374 snd_pcm_stream_unlock_irq(substream
);
2378 static snd_pcm_sframes_t
snd_pcm_capture_forward(struct snd_pcm_substream
*substream
,
2379 snd_pcm_uframes_t frames
)
2381 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2382 snd_pcm_sframes_t appl_ptr
;
2383 snd_pcm_sframes_t ret
;
2384 snd_pcm_sframes_t avail
;
2389 snd_pcm_stream_lock_irq(substream
);
2390 switch (runtime
->status
->state
) {
2391 case SNDRV_PCM_STATE_PREPARED
:
2392 case SNDRV_PCM_STATE_DRAINING
:
2393 case SNDRV_PCM_STATE_PAUSED
:
2395 case SNDRV_PCM_STATE_RUNNING
:
2396 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2399 case SNDRV_PCM_STATE_XRUN
:
2402 case SNDRV_PCM_STATE_SUSPENDED
:
2410 avail
= snd_pcm_capture_avail(runtime
);
2415 if (frames
> (snd_pcm_uframes_t
)avail
)
2417 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2418 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2419 appl_ptr
-= runtime
->boundary
;
2420 runtime
->control
->appl_ptr
= appl_ptr
;
2423 snd_pcm_stream_unlock_irq(substream
);
2427 static int snd_pcm_hwsync(struct snd_pcm_substream
*substream
)
2429 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2432 snd_pcm_stream_lock_irq(substream
);
2433 switch (runtime
->status
->state
) {
2434 case SNDRV_PCM_STATE_DRAINING
:
2435 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2438 case SNDRV_PCM_STATE_RUNNING
:
2439 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2442 case SNDRV_PCM_STATE_PREPARED
:
2443 case SNDRV_PCM_STATE_SUSPENDED
:
2446 case SNDRV_PCM_STATE_XRUN
:
2454 snd_pcm_stream_unlock_irq(substream
);
2458 static int snd_pcm_delay(struct snd_pcm_substream
*substream
,
2459 snd_pcm_sframes_t __user
*res
)
2461 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2463 snd_pcm_sframes_t n
= 0;
2465 snd_pcm_stream_lock_irq(substream
);
2466 switch (runtime
->status
->state
) {
2467 case SNDRV_PCM_STATE_DRAINING
:
2468 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2471 case SNDRV_PCM_STATE_RUNNING
:
2472 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2475 case SNDRV_PCM_STATE_PREPARED
:
2476 case SNDRV_PCM_STATE_SUSPENDED
:
2478 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2479 n
= snd_pcm_playback_hw_avail(runtime
);
2481 n
= snd_pcm_capture_avail(runtime
);
2482 n
+= runtime
->delay
;
2484 case SNDRV_PCM_STATE_XRUN
:
2492 snd_pcm_stream_unlock_irq(substream
);
2494 if (put_user(n
, res
))
2499 static int snd_pcm_sync_ptr(struct snd_pcm_substream
*substream
,
2500 struct snd_pcm_sync_ptr __user
*_sync_ptr
)
2502 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2503 struct snd_pcm_sync_ptr sync_ptr
;
2504 volatile struct snd_pcm_mmap_status
*status
;
2505 volatile struct snd_pcm_mmap_control
*control
;
2508 memset(&sync_ptr
, 0, sizeof(sync_ptr
));
2509 if (get_user(sync_ptr
.flags
, (unsigned __user
*)&(_sync_ptr
->flags
)))
2511 if (copy_from_user(&sync_ptr
.c
.control
, &(_sync_ptr
->c
.control
), sizeof(struct snd_pcm_mmap_control
)))
2513 status
= runtime
->status
;
2514 control
= runtime
->control
;
2515 if (sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_HWSYNC
) {
2516 err
= snd_pcm_hwsync(substream
);
2520 snd_pcm_stream_lock_irq(substream
);
2521 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_APPL
))
2522 control
->appl_ptr
= sync_ptr
.c
.control
.appl_ptr
;
2524 sync_ptr
.c
.control
.appl_ptr
= control
->appl_ptr
;
2525 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_AVAIL_MIN
))
2526 control
->avail_min
= sync_ptr
.c
.control
.avail_min
;
2528 sync_ptr
.c
.control
.avail_min
= control
->avail_min
;
2529 sync_ptr
.s
.status
.state
= status
->state
;
2530 sync_ptr
.s
.status
.hw_ptr
= status
->hw_ptr
;
2531 sync_ptr
.s
.status
.tstamp
= status
->tstamp
;
2532 sync_ptr
.s
.status
.suspended_state
= status
->suspended_state
;
2533 snd_pcm_stream_unlock_irq(substream
);
2534 if (copy_to_user(_sync_ptr
, &sync_ptr
, sizeof(sync_ptr
)))
2539 static int snd_pcm_tstamp(struct snd_pcm_substream
*substream
, int __user
*_arg
)
2541 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2544 if (get_user(arg
, _arg
))
2546 if (arg
< 0 || arg
> SNDRV_PCM_TSTAMP_TYPE_LAST
)
2548 runtime
->tstamp_type
= arg
;
2552 static int snd_pcm_common_ioctl1(struct file
*file
,
2553 struct snd_pcm_substream
*substream
,
2554 unsigned int cmd
, void __user
*arg
)
2557 case SNDRV_PCM_IOCTL_PVERSION
:
2558 return put_user(SNDRV_PCM_VERSION
, (int __user
*)arg
) ? -EFAULT
: 0;
2559 case SNDRV_PCM_IOCTL_INFO
:
2560 return snd_pcm_info_user(substream
, arg
);
2561 case SNDRV_PCM_IOCTL_TSTAMP
: /* just for compatibility */
2563 case SNDRV_PCM_IOCTL_TTSTAMP
:
2564 return snd_pcm_tstamp(substream
, arg
);
2565 case SNDRV_PCM_IOCTL_HW_REFINE
:
2566 return snd_pcm_hw_refine_user(substream
, arg
);
2567 case SNDRV_PCM_IOCTL_HW_PARAMS
:
2568 return snd_pcm_hw_params_user(substream
, arg
);
2569 case SNDRV_PCM_IOCTL_HW_FREE
:
2570 return snd_pcm_hw_free(substream
);
2571 case SNDRV_PCM_IOCTL_SW_PARAMS
:
2572 return snd_pcm_sw_params_user(substream
, arg
);
2573 case SNDRV_PCM_IOCTL_STATUS
:
2574 return snd_pcm_status_user(substream
, arg
);
2575 case SNDRV_PCM_IOCTL_CHANNEL_INFO
:
2576 return snd_pcm_channel_info_user(substream
, arg
);
2577 case SNDRV_PCM_IOCTL_PREPARE
:
2578 return snd_pcm_prepare(substream
, file
);
2579 case SNDRV_PCM_IOCTL_RESET
:
2580 return snd_pcm_reset(substream
);
2581 case SNDRV_PCM_IOCTL_START
:
2582 return snd_pcm_action_lock_irq(&snd_pcm_action_start
, substream
, SNDRV_PCM_STATE_RUNNING
);
2583 case SNDRV_PCM_IOCTL_LINK
:
2584 return snd_pcm_link(substream
, (int)(unsigned long) arg
);
2585 case SNDRV_PCM_IOCTL_UNLINK
:
2586 return snd_pcm_unlink(substream
);
2587 case SNDRV_PCM_IOCTL_RESUME
:
2588 return snd_pcm_resume(substream
);
2589 case SNDRV_PCM_IOCTL_XRUN
:
2590 return snd_pcm_xrun(substream
);
2591 case SNDRV_PCM_IOCTL_HWSYNC
:
2592 return snd_pcm_hwsync(substream
);
2593 case SNDRV_PCM_IOCTL_DELAY
:
2594 return snd_pcm_delay(substream
, arg
);
2595 case SNDRV_PCM_IOCTL_SYNC_PTR
:
2596 return snd_pcm_sync_ptr(substream
, arg
);
2597 #ifdef CONFIG_SND_SUPPORT_OLD_API
2598 case SNDRV_PCM_IOCTL_HW_REFINE_OLD
:
2599 return snd_pcm_hw_refine_old_user(substream
, arg
);
2600 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD
:
2601 return snd_pcm_hw_params_old_user(substream
, arg
);
2603 case SNDRV_PCM_IOCTL_DRAIN
:
2604 return snd_pcm_drain(substream
, file
);
2605 case SNDRV_PCM_IOCTL_DROP
:
2606 return snd_pcm_drop(substream
);
2607 case SNDRV_PCM_IOCTL_PAUSE
:
2610 snd_pcm_stream_lock_irq(substream
);
2611 res
= snd_pcm_pause(substream
, (int)(unsigned long)arg
);
2612 snd_pcm_stream_unlock_irq(substream
);
2616 pcm_dbg(substream
->pcm
, "unknown ioctl = 0x%x\n", cmd
);
2620 static int snd_pcm_playback_ioctl1(struct file
*file
,
2621 struct snd_pcm_substream
*substream
,
2622 unsigned int cmd
, void __user
*arg
)
2624 if (snd_BUG_ON(!substream
))
2626 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
2629 case SNDRV_PCM_IOCTL_WRITEI_FRAMES
:
2631 struct snd_xferi xferi
;
2632 struct snd_xferi __user
*_xferi
= arg
;
2633 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2634 snd_pcm_sframes_t result
;
2635 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2637 if (put_user(0, &_xferi
->result
))
2639 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2641 result
= snd_pcm_lib_write(substream
, xferi
.buf
, xferi
.frames
);
2642 __put_user(result
, &_xferi
->result
);
2643 return result
< 0 ? result
: 0;
2645 case SNDRV_PCM_IOCTL_WRITEN_FRAMES
:
2647 struct snd_xfern xfern
;
2648 struct snd_xfern __user
*_xfern
= arg
;
2649 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2651 snd_pcm_sframes_t result
;
2652 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2654 if (runtime
->channels
> 128)
2656 if (put_user(0, &_xfern
->result
))
2658 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2661 bufs
= memdup_user(xfern
.bufs
,
2662 sizeof(void *) * runtime
->channels
);
2664 return PTR_ERR(bufs
);
2665 result
= snd_pcm_lib_writev(substream
, bufs
, xfern
.frames
);
2667 __put_user(result
, &_xfern
->result
);
2668 return result
< 0 ? result
: 0;
2670 case SNDRV_PCM_IOCTL_REWIND
:
2672 snd_pcm_uframes_t frames
;
2673 snd_pcm_uframes_t __user
*_frames
= arg
;
2674 snd_pcm_sframes_t result
;
2675 if (get_user(frames
, _frames
))
2677 if (put_user(0, _frames
))
2679 result
= snd_pcm_playback_rewind(substream
, frames
);
2680 __put_user(result
, _frames
);
2681 return result
< 0 ? result
: 0;
2683 case SNDRV_PCM_IOCTL_FORWARD
:
2685 snd_pcm_uframes_t frames
;
2686 snd_pcm_uframes_t __user
*_frames
= arg
;
2687 snd_pcm_sframes_t result
;
2688 if (get_user(frames
, _frames
))
2690 if (put_user(0, _frames
))
2692 result
= snd_pcm_playback_forward(substream
, frames
);
2693 __put_user(result
, _frames
);
2694 return result
< 0 ? result
: 0;
2697 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2700 static int snd_pcm_capture_ioctl1(struct file
*file
,
2701 struct snd_pcm_substream
*substream
,
2702 unsigned int cmd
, void __user
*arg
)
2704 if (snd_BUG_ON(!substream
))
2706 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_CAPTURE
))
2709 case SNDRV_PCM_IOCTL_READI_FRAMES
:
2711 struct snd_xferi xferi
;
2712 struct snd_xferi __user
*_xferi
= arg
;
2713 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2714 snd_pcm_sframes_t result
;
2715 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2717 if (put_user(0, &_xferi
->result
))
2719 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2721 result
= snd_pcm_lib_read(substream
, xferi
.buf
, xferi
.frames
);
2722 __put_user(result
, &_xferi
->result
);
2723 return result
< 0 ? result
: 0;
2725 case SNDRV_PCM_IOCTL_READN_FRAMES
:
2727 struct snd_xfern xfern
;
2728 struct snd_xfern __user
*_xfern
= arg
;
2729 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2731 snd_pcm_sframes_t result
;
2732 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2734 if (runtime
->channels
> 128)
2736 if (put_user(0, &_xfern
->result
))
2738 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2741 bufs
= memdup_user(xfern
.bufs
,
2742 sizeof(void *) * runtime
->channels
);
2744 return PTR_ERR(bufs
);
2745 result
= snd_pcm_lib_readv(substream
, bufs
, xfern
.frames
);
2747 __put_user(result
, &_xfern
->result
);
2748 return result
< 0 ? result
: 0;
2750 case SNDRV_PCM_IOCTL_REWIND
:
2752 snd_pcm_uframes_t frames
;
2753 snd_pcm_uframes_t __user
*_frames
= arg
;
2754 snd_pcm_sframes_t result
;
2755 if (get_user(frames
, _frames
))
2757 if (put_user(0, _frames
))
2759 result
= snd_pcm_capture_rewind(substream
, frames
);
2760 __put_user(result
, _frames
);
2761 return result
< 0 ? result
: 0;
2763 case SNDRV_PCM_IOCTL_FORWARD
:
2765 snd_pcm_uframes_t frames
;
2766 snd_pcm_uframes_t __user
*_frames
= arg
;
2767 snd_pcm_sframes_t result
;
2768 if (get_user(frames
, _frames
))
2770 if (put_user(0, _frames
))
2772 result
= snd_pcm_capture_forward(substream
, frames
);
2773 __put_user(result
, _frames
);
2774 return result
< 0 ? result
: 0;
2777 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2780 static long snd_pcm_playback_ioctl(struct file
*file
, unsigned int cmd
,
2783 struct snd_pcm_file
*pcm_file
;
2785 pcm_file
= file
->private_data
;
2787 if (((cmd
>> 8) & 0xff) != 'A')
2790 return snd_pcm_playback_ioctl1(file
, pcm_file
->substream
, cmd
,
2791 (void __user
*)arg
);
2794 static long snd_pcm_capture_ioctl(struct file
*file
, unsigned int cmd
,
2797 struct snd_pcm_file
*pcm_file
;
2799 pcm_file
= file
->private_data
;
2801 if (((cmd
>> 8) & 0xff) != 'A')
2804 return snd_pcm_capture_ioctl1(file
, pcm_file
->substream
, cmd
,
2805 (void __user
*)arg
);
2808 int snd_pcm_kernel_ioctl(struct snd_pcm_substream
*substream
,
2809 unsigned int cmd
, void *arg
)
2814 fs
= snd_enter_user();
2815 switch (substream
->stream
) {
2816 case SNDRV_PCM_STREAM_PLAYBACK
:
2817 result
= snd_pcm_playback_ioctl1(NULL
, substream
, cmd
,
2818 (void __user
*)arg
);
2820 case SNDRV_PCM_STREAM_CAPTURE
:
2821 result
= snd_pcm_capture_ioctl1(NULL
, substream
, cmd
,
2822 (void __user
*)arg
);
2832 EXPORT_SYMBOL(snd_pcm_kernel_ioctl
);
2834 static ssize_t
snd_pcm_read(struct file
*file
, char __user
*buf
, size_t count
,
2837 struct snd_pcm_file
*pcm_file
;
2838 struct snd_pcm_substream
*substream
;
2839 struct snd_pcm_runtime
*runtime
;
2840 snd_pcm_sframes_t result
;
2842 pcm_file
= file
->private_data
;
2843 substream
= pcm_file
->substream
;
2844 if (PCM_RUNTIME_CHECK(substream
))
2846 runtime
= substream
->runtime
;
2847 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2849 if (!frame_aligned(runtime
, count
))
2851 count
= bytes_to_frames(runtime
, count
);
2852 result
= snd_pcm_lib_read(substream
, buf
, count
);
2854 result
= frames_to_bytes(runtime
, result
);
2858 static ssize_t
snd_pcm_write(struct file
*file
, const char __user
*buf
,
2859 size_t count
, loff_t
* offset
)
2861 struct snd_pcm_file
*pcm_file
;
2862 struct snd_pcm_substream
*substream
;
2863 struct snd_pcm_runtime
*runtime
;
2864 snd_pcm_sframes_t result
;
2866 pcm_file
= file
->private_data
;
2867 substream
= pcm_file
->substream
;
2868 if (PCM_RUNTIME_CHECK(substream
))
2870 runtime
= substream
->runtime
;
2871 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2873 if (!frame_aligned(runtime
, count
))
2875 count
= bytes_to_frames(runtime
, count
);
2876 result
= snd_pcm_lib_write(substream
, buf
, count
);
2878 result
= frames_to_bytes(runtime
, result
);
2882 static ssize_t
snd_pcm_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
2883 unsigned long nr_segs
, loff_t pos
)
2886 struct snd_pcm_file
*pcm_file
;
2887 struct snd_pcm_substream
*substream
;
2888 struct snd_pcm_runtime
*runtime
;
2889 snd_pcm_sframes_t result
;
2892 snd_pcm_uframes_t frames
;
2894 pcm_file
= iocb
->ki_filp
->private_data
;
2895 substream
= pcm_file
->substream
;
2896 if (PCM_RUNTIME_CHECK(substream
))
2898 runtime
= substream
->runtime
;
2899 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2901 if (nr_segs
> 1024 || nr_segs
!= runtime
->channels
)
2903 if (!frame_aligned(runtime
, iov
->iov_len
))
2905 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2906 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2909 for (i
= 0; i
< nr_segs
; ++i
)
2910 bufs
[i
] = iov
[i
].iov_base
;
2911 result
= snd_pcm_lib_readv(substream
, bufs
, frames
);
2913 result
= frames_to_bytes(runtime
, result
);
2918 static ssize_t
snd_pcm_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
2919 unsigned long nr_segs
, loff_t pos
)
2921 struct snd_pcm_file
*pcm_file
;
2922 struct snd_pcm_substream
*substream
;
2923 struct snd_pcm_runtime
*runtime
;
2924 snd_pcm_sframes_t result
;
2927 snd_pcm_uframes_t frames
;
2929 pcm_file
= iocb
->ki_filp
->private_data
;
2930 substream
= pcm_file
->substream
;
2931 if (PCM_RUNTIME_CHECK(substream
))
2933 runtime
= substream
->runtime
;
2934 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2936 if (nr_segs
> 128 || nr_segs
!= runtime
->channels
||
2937 !frame_aligned(runtime
, iov
->iov_len
))
2939 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2940 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2943 for (i
= 0; i
< nr_segs
; ++i
)
2944 bufs
[i
] = iov
[i
].iov_base
;
2945 result
= snd_pcm_lib_writev(substream
, bufs
, frames
);
2947 result
= frames_to_bytes(runtime
, result
);
2952 static unsigned int snd_pcm_playback_poll(struct file
*file
, poll_table
* wait
)
2954 struct snd_pcm_file
*pcm_file
;
2955 struct snd_pcm_substream
*substream
;
2956 struct snd_pcm_runtime
*runtime
;
2958 snd_pcm_uframes_t avail
;
2960 pcm_file
= file
->private_data
;
2962 substream
= pcm_file
->substream
;
2963 if (PCM_RUNTIME_CHECK(substream
))
2965 runtime
= substream
->runtime
;
2967 poll_wait(file
, &runtime
->sleep
, wait
);
2969 snd_pcm_stream_lock_irq(substream
);
2970 avail
= snd_pcm_playback_avail(runtime
);
2971 switch (runtime
->status
->state
) {
2972 case SNDRV_PCM_STATE_RUNNING
:
2973 case SNDRV_PCM_STATE_PREPARED
:
2974 case SNDRV_PCM_STATE_PAUSED
:
2975 if (avail
>= runtime
->control
->avail_min
) {
2976 mask
= POLLOUT
| POLLWRNORM
;
2980 case SNDRV_PCM_STATE_DRAINING
:
2984 mask
= POLLOUT
| POLLWRNORM
| POLLERR
;
2987 snd_pcm_stream_unlock_irq(substream
);
2991 static unsigned int snd_pcm_capture_poll(struct file
*file
, poll_table
* wait
)
2993 struct snd_pcm_file
*pcm_file
;
2994 struct snd_pcm_substream
*substream
;
2995 struct snd_pcm_runtime
*runtime
;
2997 snd_pcm_uframes_t avail
;
2999 pcm_file
= file
->private_data
;
3001 substream
= pcm_file
->substream
;
3002 if (PCM_RUNTIME_CHECK(substream
))
3004 runtime
= substream
->runtime
;
3006 poll_wait(file
, &runtime
->sleep
, wait
);
3008 snd_pcm_stream_lock_irq(substream
);
3009 avail
= snd_pcm_capture_avail(runtime
);
3010 switch (runtime
->status
->state
) {
3011 case SNDRV_PCM_STATE_RUNNING
:
3012 case SNDRV_PCM_STATE_PREPARED
:
3013 case SNDRV_PCM_STATE_PAUSED
:
3014 if (avail
>= runtime
->control
->avail_min
) {
3015 mask
= POLLIN
| POLLRDNORM
;
3020 case SNDRV_PCM_STATE_DRAINING
:
3022 mask
= POLLIN
| POLLRDNORM
;
3027 mask
= POLLIN
| POLLRDNORM
| POLLERR
;
3030 snd_pcm_stream_unlock_irq(substream
);
3039 * Only on coherent architectures, we can mmap the status and the control records
3040 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3042 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3044 * mmap status record
3046 static int snd_pcm_mmap_status_fault(struct vm_area_struct
*area
,
3047 struct vm_fault
*vmf
)
3049 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3050 struct snd_pcm_runtime
*runtime
;
3052 if (substream
== NULL
)
3053 return VM_FAULT_SIGBUS
;
3054 runtime
= substream
->runtime
;
3055 vmf
->page
= virt_to_page(runtime
->status
);
3056 get_page(vmf
->page
);
3060 static const struct vm_operations_struct snd_pcm_vm_ops_status
=
3062 .fault
= snd_pcm_mmap_status_fault
,
3065 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3066 struct vm_area_struct
*area
)
3069 if (!(area
->vm_flags
& VM_READ
))
3071 size
= area
->vm_end
- area
->vm_start
;
3072 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)))
3074 area
->vm_ops
= &snd_pcm_vm_ops_status
;
3075 area
->vm_private_data
= substream
;
3076 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3081 * mmap control record
3083 static int snd_pcm_mmap_control_fault(struct vm_area_struct
*area
,
3084 struct vm_fault
*vmf
)
3086 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3087 struct snd_pcm_runtime
*runtime
;
3089 if (substream
== NULL
)
3090 return VM_FAULT_SIGBUS
;
3091 runtime
= substream
->runtime
;
3092 vmf
->page
= virt_to_page(runtime
->control
);
3093 get_page(vmf
->page
);
3097 static const struct vm_operations_struct snd_pcm_vm_ops_control
=
3099 .fault
= snd_pcm_mmap_control_fault
,
3102 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3103 struct vm_area_struct
*area
)
3106 if (!(area
->vm_flags
& VM_READ
))
3108 size
= area
->vm_end
- area
->vm_start
;
3109 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
)))
3111 area
->vm_ops
= &snd_pcm_vm_ops_control
;
3112 area
->vm_private_data
= substream
;
3113 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3116 #else /* ! coherent mmap */
3118 * don't support mmap for status and control records.
3120 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3121 struct vm_area_struct
*area
)
3125 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3126 struct vm_area_struct
*area
)
3130 #endif /* coherent mmap */
3132 static inline struct page
*
3133 snd_pcm_default_page_ops(struct snd_pcm_substream
*substream
, unsigned long ofs
)
3135 void *vaddr
= substream
->runtime
->dma_area
+ ofs
;
3136 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3137 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3138 return virt_to_page(CAC_ADDR(vaddr
));
3140 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3141 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
) {
3142 dma_addr_t addr
= substream
->runtime
->dma_addr
+ ofs
;
3143 addr
-= get_dma_offset(substream
->dma_buffer
.dev
.dev
);
3144 /* assume dma_handle set via pfn_to_phys() in
3145 * mm/dma-noncoherent.c
3147 return pfn_to_page(addr
>> PAGE_SHIFT
);
3150 return virt_to_page(vaddr
);
3154 * fault callback for mmapping a RAM page
3156 static int snd_pcm_mmap_data_fault(struct vm_area_struct
*area
,
3157 struct vm_fault
*vmf
)
3159 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3160 struct snd_pcm_runtime
*runtime
;
3161 unsigned long offset
;
3165 if (substream
== NULL
)
3166 return VM_FAULT_SIGBUS
;
3167 runtime
= substream
->runtime
;
3168 offset
= vmf
->pgoff
<< PAGE_SHIFT
;
3169 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3170 if (offset
> dma_bytes
- PAGE_SIZE
)
3171 return VM_FAULT_SIGBUS
;
3172 if (substream
->ops
->page
)
3173 page
= substream
->ops
->page(substream
, offset
);
3175 page
= snd_pcm_default_page_ops(substream
, offset
);
3177 return VM_FAULT_SIGBUS
;
3183 static const struct vm_operations_struct snd_pcm_vm_ops_data
= {
3184 .open
= snd_pcm_mmap_data_open
,
3185 .close
= snd_pcm_mmap_data_close
,
3188 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault
= {
3189 .open
= snd_pcm_mmap_data_open
,
3190 .close
= snd_pcm_mmap_data_close
,
3191 .fault
= snd_pcm_mmap_data_fault
,
3194 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3195 /* This should be defined / handled globally! */
3197 #define ARCH_HAS_DMA_MMAP_COHERENT
3202 * mmap the DMA buffer on RAM
3204 int snd_pcm_lib_default_mmap(struct snd_pcm_substream
*substream
,
3205 struct vm_area_struct
*area
)
3207 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3208 #ifdef CONFIG_GENERIC_ALLOCATOR
3209 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV_IRAM
) {
3210 area
->vm_page_prot
= pgprot_writecombine(area
->vm_page_prot
);
3211 return remap_pfn_range(area
, area
->vm_start
,
3212 substream
->dma_buffer
.addr
>> PAGE_SHIFT
,
3213 area
->vm_end
- area
->vm_start
, area
->vm_page_prot
);
3215 #endif /* CONFIG_GENERIC_ALLOCATOR */
3216 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3217 if (!substream
->ops
->page
&&
3218 substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3219 return dma_mmap_coherent(substream
->dma_buffer
.dev
.dev
,
3221 substream
->runtime
->dma_area
,
3222 substream
->runtime
->dma_addr
,
3223 area
->vm_end
- area
->vm_start
);
3224 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3225 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
&&
3226 !plat_device_is_coherent(substream
->dma_buffer
.dev
.dev
))
3227 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3228 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3229 /* mmap with fault handler */
3230 area
->vm_ops
= &snd_pcm_vm_ops_data_fault
;
3233 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap
);
3236 * mmap the DMA buffer on I/O memory area
3238 #if SNDRV_PCM_INFO_MMAP_IOMEM
3239 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream
*substream
,
3240 struct vm_area_struct
*area
)
3242 struct snd_pcm_runtime
*runtime
= substream
->runtime
;;
3244 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3245 return vm_iomap_memory(area
, runtime
->dma_addr
, runtime
->dma_bytes
);
3248 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem
);
3249 #endif /* SNDRV_PCM_INFO_MMAP */
3254 int snd_pcm_mmap_data(struct snd_pcm_substream
*substream
, struct file
*file
,
3255 struct vm_area_struct
*area
)
3257 struct snd_pcm_runtime
*runtime
;
3259 unsigned long offset
;
3263 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
3264 if (!(area
->vm_flags
& (VM_WRITE
|VM_READ
)))
3267 if (!(area
->vm_flags
& VM_READ
))
3270 runtime
= substream
->runtime
;
3271 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3273 if (!(runtime
->info
& SNDRV_PCM_INFO_MMAP
))
3275 if (runtime
->access
== SNDRV_PCM_ACCESS_RW_INTERLEAVED
||
3276 runtime
->access
== SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
)
3278 size
= area
->vm_end
- area
->vm_start
;
3279 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3280 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3281 if ((size_t)size
> dma_bytes
)
3283 if (offset
> dma_bytes
- size
)
3286 area
->vm_ops
= &snd_pcm_vm_ops_data
;
3287 area
->vm_private_data
= substream
;
3288 if (substream
->ops
->mmap
)
3289 err
= substream
->ops
->mmap(substream
, area
);
3291 err
= snd_pcm_lib_default_mmap(substream
, area
);
3293 atomic_inc(&substream
->mmap_count
);
3297 EXPORT_SYMBOL(snd_pcm_mmap_data
);
3299 static int snd_pcm_mmap(struct file
*file
, struct vm_area_struct
*area
)
3301 struct snd_pcm_file
* pcm_file
;
3302 struct snd_pcm_substream
*substream
;
3303 unsigned long offset
;
3305 pcm_file
= file
->private_data
;
3306 substream
= pcm_file
->substream
;
3307 if (PCM_RUNTIME_CHECK(substream
))
3310 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3312 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3313 if (pcm_file
->no_compat_mmap
)
3315 return snd_pcm_mmap_status(substream
, file
, area
);
3316 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3317 if (pcm_file
->no_compat_mmap
)
3319 return snd_pcm_mmap_control(substream
, file
, area
);
3321 return snd_pcm_mmap_data(substream
, file
, area
);
3326 static int snd_pcm_fasync(int fd
, struct file
* file
, int on
)
3328 struct snd_pcm_file
* pcm_file
;
3329 struct snd_pcm_substream
*substream
;
3330 struct snd_pcm_runtime
*runtime
;
3332 pcm_file
= file
->private_data
;
3333 substream
= pcm_file
->substream
;
3334 if (PCM_RUNTIME_CHECK(substream
))
3336 runtime
= substream
->runtime
;
3337 return fasync_helper(fd
, file
, on
, &runtime
->fasync
);
3343 #ifdef CONFIG_COMPAT
3344 #include "pcm_compat.c"
3346 #define snd_pcm_ioctl_compat NULL
3350 * To be removed helpers to keep binary compatibility
3353 #ifdef CONFIG_SND_SUPPORT_OLD_API
3354 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3355 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3357 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params
*params
,
3358 struct snd_pcm_hw_params_old
*oparams
)
3362 memset(params
, 0, sizeof(*params
));
3363 params
->flags
= oparams
->flags
;
3364 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3365 params
->masks
[i
].bits
[0] = oparams
->masks
[i
];
3366 memcpy(params
->intervals
, oparams
->intervals
, sizeof(oparams
->intervals
));
3367 params
->rmask
= __OLD_TO_NEW_MASK(oparams
->rmask
);
3368 params
->cmask
= __OLD_TO_NEW_MASK(oparams
->cmask
);
3369 params
->info
= oparams
->info
;
3370 params
->msbits
= oparams
->msbits
;
3371 params
->rate_num
= oparams
->rate_num
;
3372 params
->rate_den
= oparams
->rate_den
;
3373 params
->fifo_size
= oparams
->fifo_size
;
3376 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old
*oparams
,
3377 struct snd_pcm_hw_params
*params
)
3381 memset(oparams
, 0, sizeof(*oparams
));
3382 oparams
->flags
= params
->flags
;
3383 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3384 oparams
->masks
[i
] = params
->masks
[i
].bits
[0];
3385 memcpy(oparams
->intervals
, params
->intervals
, sizeof(oparams
->intervals
));
3386 oparams
->rmask
= __NEW_TO_OLD_MASK(params
->rmask
);
3387 oparams
->cmask
= __NEW_TO_OLD_MASK(params
->cmask
);
3388 oparams
->info
= params
->info
;
3389 oparams
->msbits
= params
->msbits
;
3390 oparams
->rate_num
= params
->rate_num
;
3391 oparams
->rate_den
= params
->rate_den
;
3392 oparams
->fifo_size
= params
->fifo_size
;
3395 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
3396 struct snd_pcm_hw_params_old __user
* _oparams
)
3398 struct snd_pcm_hw_params
*params
;
3399 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3402 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3406 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3407 if (IS_ERR(oparams
)) {
3408 err
= PTR_ERR(oparams
);
3411 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3412 err
= snd_pcm_hw_refine(substream
, params
);
3413 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3414 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3425 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
3426 struct snd_pcm_hw_params_old __user
* _oparams
)
3428 struct snd_pcm_hw_params
*params
;
3429 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3432 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3436 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3437 if (IS_ERR(oparams
)) {
3438 err
= PTR_ERR(oparams
);
3441 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3442 err
= snd_pcm_hw_params(substream
, params
);
3443 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3444 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3454 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3457 static unsigned long snd_pcm_get_unmapped_area(struct file
*file
,
3460 unsigned long pgoff
,
3461 unsigned long flags
)
3463 struct snd_pcm_file
*pcm_file
= file
->private_data
;
3464 struct snd_pcm_substream
*substream
= pcm_file
->substream
;
3465 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
3466 unsigned long offset
= pgoff
<< PAGE_SHIFT
;
3469 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3470 return (unsigned long)runtime
->status
;
3471 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3472 return (unsigned long)runtime
->control
;
3474 return (unsigned long)runtime
->dma_area
+ offset
;
3478 # define snd_pcm_get_unmapped_area NULL
3485 const struct file_operations snd_pcm_f_ops
[2] = {
3487 .owner
= THIS_MODULE
,
3488 .write
= snd_pcm_write
,
3489 .aio_write
= snd_pcm_aio_write
,
3490 .open
= snd_pcm_playback_open
,
3491 .release
= snd_pcm_release
,
3492 .llseek
= no_llseek
,
3493 .poll
= snd_pcm_playback_poll
,
3494 .unlocked_ioctl
= snd_pcm_playback_ioctl
,
3495 .compat_ioctl
= snd_pcm_ioctl_compat
,
3496 .mmap
= snd_pcm_mmap
,
3497 .fasync
= snd_pcm_fasync
,
3498 .get_unmapped_area
= snd_pcm_get_unmapped_area
,
3501 .owner
= THIS_MODULE
,
3502 .read
= snd_pcm_read
,
3503 .aio_read
= snd_pcm_aio_read
,
3504 .open
= snd_pcm_capture_open
,
3505 .release
= snd_pcm_release
,
3506 .llseek
= no_llseek
,
3507 .poll
= snd_pcm_capture_poll
,
3508 .unlocked_ioctl
= snd_pcm_capture_ioctl
,
3509 .compat_ioctl
= snd_pcm_ioctl_compat
,
3510 .mmap
= snd_pcm_mmap
,
3511 .fasync
= snd_pcm_fasync
,
3512 .get_unmapped_area
= snd_pcm_get_unmapped_area
,