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 printk(KERN_DEBUG
"%s = ", snd_pcm_hw_param_names
[k
]);
194 printk("%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 printk("%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 printk(KERN_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 printk("%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 printk(KERN_DEBUG
"Rule %d [%p]: ", k
, r
->func
);
260 printk("%s = ", snd_pcm_hw_param_names
[r
->var
]);
261 if (hw_is_mask(r
->var
)) {
262 m
= hw_param_mask(params
, r
->var
);
263 printk("%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 printk("%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 defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
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
->avail_min
== 0)
548 if (params
->silence_size
>= runtime
->boundary
) {
549 if (params
->silence_threshold
!= 0)
552 if (params
->silence_size
> params
->silence_threshold
)
554 if (params
->silence_threshold
> runtime
->buffer_size
)
558 snd_pcm_stream_lock_irq(substream
);
559 runtime
->tstamp_mode
= params
->tstamp_mode
;
560 runtime
->period_step
= params
->period_step
;
561 runtime
->control
->avail_min
= params
->avail_min
;
562 runtime
->start_threshold
= params
->start_threshold
;
563 runtime
->stop_threshold
= params
->stop_threshold
;
564 runtime
->silence_threshold
= params
->silence_threshold
;
565 runtime
->silence_size
= params
->silence_size
;
566 params
->boundary
= runtime
->boundary
;
567 if (snd_pcm_running(substream
)) {
568 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
569 runtime
->silence_size
> 0)
570 snd_pcm_playback_silence(substream
, ULONG_MAX
);
571 err
= snd_pcm_update_state(substream
, runtime
);
573 snd_pcm_stream_unlock_irq(substream
);
577 static int snd_pcm_sw_params_user(struct snd_pcm_substream
*substream
,
578 struct snd_pcm_sw_params __user
* _params
)
580 struct snd_pcm_sw_params params
;
582 if (copy_from_user(¶ms
, _params
, sizeof(params
)))
584 err
= snd_pcm_sw_params(substream
, ¶ms
);
585 if (copy_to_user(_params
, ¶ms
, sizeof(params
)))
590 int snd_pcm_status(struct snd_pcm_substream
*substream
,
591 struct snd_pcm_status
*status
)
593 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
595 snd_pcm_stream_lock_irq(substream
);
596 status
->state
= runtime
->status
->state
;
597 status
->suspended_state
= runtime
->status
->suspended_state
;
598 if (status
->state
== SNDRV_PCM_STATE_OPEN
)
600 status
->trigger_tstamp
= runtime
->trigger_tstamp
;
601 if (snd_pcm_running(substream
)) {
602 snd_pcm_update_hw_ptr(substream
);
603 if (runtime
->tstamp_mode
== SNDRV_PCM_TSTAMP_ENABLE
) {
604 status
->tstamp
= runtime
->status
->tstamp
;
605 status
->audio_tstamp
=
606 runtime
->status
->audio_tstamp
;
610 snd_pcm_gettime(runtime
, &status
->tstamp
);
612 status
->appl_ptr
= runtime
->control
->appl_ptr
;
613 status
->hw_ptr
= runtime
->status
->hw_ptr
;
614 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
615 status
->avail
= snd_pcm_playback_avail(runtime
);
616 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
||
617 runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
618 status
->delay
= runtime
->buffer_size
- status
->avail
;
619 status
->delay
+= runtime
->delay
;
623 status
->avail
= snd_pcm_capture_avail(runtime
);
624 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
)
625 status
->delay
= status
->avail
+ runtime
->delay
;
629 status
->avail_max
= runtime
->avail_max
;
630 status
->overrange
= runtime
->overrange
;
631 runtime
->avail_max
= 0;
632 runtime
->overrange
= 0;
634 snd_pcm_stream_unlock_irq(substream
);
638 static int snd_pcm_status_user(struct snd_pcm_substream
*substream
,
639 struct snd_pcm_status __user
* _status
)
641 struct snd_pcm_status status
;
644 memset(&status
, 0, sizeof(status
));
645 res
= snd_pcm_status(substream
, &status
);
648 if (copy_to_user(_status
, &status
, sizeof(status
)))
653 static int snd_pcm_channel_info(struct snd_pcm_substream
*substream
,
654 struct snd_pcm_channel_info
* info
)
656 struct snd_pcm_runtime
*runtime
;
657 unsigned int channel
;
659 channel
= info
->channel
;
660 runtime
= substream
->runtime
;
661 snd_pcm_stream_lock_irq(substream
);
662 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
663 snd_pcm_stream_unlock_irq(substream
);
666 snd_pcm_stream_unlock_irq(substream
);
667 if (channel
>= runtime
->channels
)
669 memset(info
, 0, sizeof(*info
));
670 info
->channel
= channel
;
671 return substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_CHANNEL_INFO
, info
);
674 static int snd_pcm_channel_info_user(struct snd_pcm_substream
*substream
,
675 struct snd_pcm_channel_info __user
* _info
)
677 struct snd_pcm_channel_info info
;
680 if (copy_from_user(&info
, _info
, sizeof(info
)))
682 res
= snd_pcm_channel_info(substream
, &info
);
685 if (copy_to_user(_info
, &info
, sizeof(info
)))
690 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream
*substream
)
692 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
693 if (runtime
->trigger_master
== NULL
)
695 if (runtime
->trigger_master
== substream
) {
696 snd_pcm_gettime(runtime
, &runtime
->trigger_tstamp
);
698 snd_pcm_trigger_tstamp(runtime
->trigger_master
);
699 runtime
->trigger_tstamp
= runtime
->trigger_master
->runtime
->trigger_tstamp
;
701 runtime
->trigger_master
= NULL
;
705 int (*pre_action
)(struct snd_pcm_substream
*substream
, int state
);
706 int (*do_action
)(struct snd_pcm_substream
*substream
, int state
);
707 void (*undo_action
)(struct snd_pcm_substream
*substream
, int state
);
708 void (*post_action
)(struct snd_pcm_substream
*substream
, int state
);
712 * this functions is core for handling of linked stream
713 * Note: the stream state might be changed also on failure
714 * Note2: call with calling stream lock + link lock
716 static int snd_pcm_action_group(struct action_ops
*ops
,
717 struct snd_pcm_substream
*substream
,
718 int state
, int do_lock
)
720 struct snd_pcm_substream
*s
= NULL
;
721 struct snd_pcm_substream
*s1
;
724 snd_pcm_group_for_each_entry(s
, substream
) {
725 if (do_lock
&& s
!= substream
)
726 spin_lock_nested(&s
->self_group
.lock
,
727 SINGLE_DEPTH_NESTING
);
728 res
= ops
->pre_action(s
, state
);
732 snd_pcm_group_for_each_entry(s
, substream
) {
733 res
= ops
->do_action(s
, state
);
735 if (ops
->undo_action
) {
736 snd_pcm_group_for_each_entry(s1
, substream
) {
737 if (s1
== s
) /* failed stream */
739 ops
->undo_action(s1
, state
);
742 s
= NULL
; /* unlock all */
746 snd_pcm_group_for_each_entry(s
, substream
) {
747 ops
->post_action(s
, state
);
752 snd_pcm_group_for_each_entry(s1
, substream
) {
754 spin_unlock(&s1
->self_group
.lock
);
755 if (s1
== s
) /* end */
763 * Note: call with stream lock
765 static int snd_pcm_action_single(struct action_ops
*ops
,
766 struct snd_pcm_substream
*substream
,
771 res
= ops
->pre_action(substream
, state
);
774 res
= ops
->do_action(substream
, state
);
776 ops
->post_action(substream
, state
);
777 else if (ops
->undo_action
)
778 ops
->undo_action(substream
, state
);
783 * Note: call with stream lock
785 static int snd_pcm_action(struct action_ops
*ops
,
786 struct snd_pcm_substream
*substream
,
791 if (snd_pcm_stream_linked(substream
)) {
792 if (!spin_trylock(&substream
->group
->lock
)) {
793 spin_unlock(&substream
->self_group
.lock
);
794 spin_lock(&substream
->group
->lock
);
795 spin_lock(&substream
->self_group
.lock
);
797 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
798 spin_unlock(&substream
->group
->lock
);
800 res
= snd_pcm_action_single(ops
, substream
, state
);
806 * Note: don't use any locks before
808 static int snd_pcm_action_lock_irq(struct action_ops
*ops
,
809 struct snd_pcm_substream
*substream
,
814 read_lock_irq(&snd_pcm_link_rwlock
);
815 if (snd_pcm_stream_linked(substream
)) {
816 spin_lock(&substream
->group
->lock
);
817 spin_lock(&substream
->self_group
.lock
);
818 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
819 spin_unlock(&substream
->self_group
.lock
);
820 spin_unlock(&substream
->group
->lock
);
822 spin_lock(&substream
->self_group
.lock
);
823 res
= snd_pcm_action_single(ops
, substream
, state
);
824 spin_unlock(&substream
->self_group
.lock
);
826 read_unlock_irq(&snd_pcm_link_rwlock
);
832 static int snd_pcm_action_nonatomic(struct action_ops
*ops
,
833 struct snd_pcm_substream
*substream
,
838 down_read(&snd_pcm_link_rwsem
);
839 if (snd_pcm_stream_linked(substream
))
840 res
= snd_pcm_action_group(ops
, substream
, state
, 0);
842 res
= snd_pcm_action_single(ops
, substream
, state
);
843 up_read(&snd_pcm_link_rwsem
);
850 static int snd_pcm_pre_start(struct snd_pcm_substream
*substream
, int state
)
852 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
853 if (runtime
->status
->state
!= SNDRV_PCM_STATE_PREPARED
)
855 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
856 !snd_pcm_playback_data(substream
))
858 runtime
->trigger_master
= substream
;
862 static int snd_pcm_do_start(struct snd_pcm_substream
*substream
, int state
)
864 if (substream
->runtime
->trigger_master
!= substream
)
866 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_START
);
869 static void snd_pcm_undo_start(struct snd_pcm_substream
*substream
, int state
)
871 if (substream
->runtime
->trigger_master
== substream
)
872 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
875 static void snd_pcm_post_start(struct snd_pcm_substream
*substream
, int state
)
877 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
878 snd_pcm_trigger_tstamp(substream
);
879 runtime
->hw_ptr_jiffies
= jiffies
;
880 runtime
->hw_ptr_buffer_jiffies
= (runtime
->buffer_size
* HZ
) /
882 runtime
->status
->state
= state
;
883 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
884 runtime
->silence_size
> 0)
885 snd_pcm_playback_silence(substream
, ULONG_MAX
);
886 if (substream
->timer
)
887 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTART
,
888 &runtime
->trigger_tstamp
);
891 static struct action_ops snd_pcm_action_start
= {
892 .pre_action
= snd_pcm_pre_start
,
893 .do_action
= snd_pcm_do_start
,
894 .undo_action
= snd_pcm_undo_start
,
895 .post_action
= snd_pcm_post_start
899 * snd_pcm_start - start all linked streams
900 * @substream: the PCM substream instance
902 * Return: Zero if successful, or a negative error code.
904 int snd_pcm_start(struct snd_pcm_substream
*substream
)
906 return snd_pcm_action(&snd_pcm_action_start
, substream
,
907 SNDRV_PCM_STATE_RUNNING
);
913 static int snd_pcm_pre_stop(struct snd_pcm_substream
*substream
, int state
)
915 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
916 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
918 runtime
->trigger_master
= substream
;
922 static int snd_pcm_do_stop(struct snd_pcm_substream
*substream
, int state
)
924 if (substream
->runtime
->trigger_master
== substream
&&
925 snd_pcm_running(substream
))
926 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
927 return 0; /* unconditonally stop all substreams */
930 static void snd_pcm_post_stop(struct snd_pcm_substream
*substream
, int state
)
932 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
933 if (runtime
->status
->state
!= state
) {
934 snd_pcm_trigger_tstamp(substream
);
935 if (substream
->timer
)
936 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTOP
,
937 &runtime
->trigger_tstamp
);
938 runtime
->status
->state
= state
;
940 wake_up(&runtime
->sleep
);
941 wake_up(&runtime
->tsleep
);
944 static struct action_ops snd_pcm_action_stop
= {
945 .pre_action
= snd_pcm_pre_stop
,
946 .do_action
= snd_pcm_do_stop
,
947 .post_action
= snd_pcm_post_stop
951 * snd_pcm_stop - try to stop all running streams in the substream group
952 * @substream: the PCM substream instance
953 * @state: PCM state after stopping the stream
955 * The state of each stream is then changed to the given state unconditionally.
957 * Return: Zero if succesful, or a negative error code.
959 int snd_pcm_stop(struct snd_pcm_substream
*substream
, snd_pcm_state_t state
)
961 return snd_pcm_action(&snd_pcm_action_stop
, substream
, state
);
964 EXPORT_SYMBOL(snd_pcm_stop
);
967 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
968 * @substream: the PCM substream
970 * After stopping, the state is changed to SETUP.
971 * Unlike snd_pcm_stop(), this affects only the given stream.
973 * Return: Zero if succesful, or a negative error code.
975 int snd_pcm_drain_done(struct snd_pcm_substream
*substream
)
977 return snd_pcm_action_single(&snd_pcm_action_stop
, substream
,
978 SNDRV_PCM_STATE_SETUP
);
984 static int snd_pcm_pre_pause(struct snd_pcm_substream
*substream
, int push
)
986 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
987 if (!(runtime
->info
& SNDRV_PCM_INFO_PAUSE
))
990 if (runtime
->status
->state
!= SNDRV_PCM_STATE_RUNNING
)
992 } else if (runtime
->status
->state
!= SNDRV_PCM_STATE_PAUSED
)
994 runtime
->trigger_master
= substream
;
998 static int snd_pcm_do_pause(struct snd_pcm_substream
*substream
, int push
)
1000 if (substream
->runtime
->trigger_master
!= substream
)
1002 /* some drivers might use hw_ptr to recover from the pause -
1003 update the hw_ptr now */
1005 snd_pcm_update_hw_ptr(substream
);
1006 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1007 * a delta between the current jiffies, this gives a large enough
1008 * delta, effectively to skip the check once.
1010 substream
->runtime
->hw_ptr_jiffies
= jiffies
- HZ
* 1000;
1011 return substream
->ops
->trigger(substream
,
1012 push
? SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
1013 SNDRV_PCM_TRIGGER_PAUSE_RELEASE
);
1016 static void snd_pcm_undo_pause(struct snd_pcm_substream
*substream
, int push
)
1018 if (substream
->runtime
->trigger_master
== substream
)
1019 substream
->ops
->trigger(substream
,
1020 push
? SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1021 SNDRV_PCM_TRIGGER_PAUSE_PUSH
);
1024 static void snd_pcm_post_pause(struct snd_pcm_substream
*substream
, int push
)
1026 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1027 snd_pcm_trigger_tstamp(substream
);
1029 runtime
->status
->state
= SNDRV_PCM_STATE_PAUSED
;
1030 if (substream
->timer
)
1031 snd_timer_notify(substream
->timer
,
1032 SNDRV_TIMER_EVENT_MPAUSE
,
1033 &runtime
->trigger_tstamp
);
1034 wake_up(&runtime
->sleep
);
1035 wake_up(&runtime
->tsleep
);
1037 runtime
->status
->state
= SNDRV_PCM_STATE_RUNNING
;
1038 if (substream
->timer
)
1039 snd_timer_notify(substream
->timer
,
1040 SNDRV_TIMER_EVENT_MCONTINUE
,
1041 &runtime
->trigger_tstamp
);
1045 static struct action_ops snd_pcm_action_pause
= {
1046 .pre_action
= snd_pcm_pre_pause
,
1047 .do_action
= snd_pcm_do_pause
,
1048 .undo_action
= snd_pcm_undo_pause
,
1049 .post_action
= snd_pcm_post_pause
1053 * Push/release the pause for all linked streams.
1055 static int snd_pcm_pause(struct snd_pcm_substream
*substream
, int push
)
1057 return snd_pcm_action(&snd_pcm_action_pause
, substream
, push
);
1063 static int snd_pcm_pre_suspend(struct snd_pcm_substream
*substream
, int state
)
1065 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1066 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1068 runtime
->trigger_master
= substream
;
1072 static int snd_pcm_do_suspend(struct snd_pcm_substream
*substream
, int state
)
1074 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1075 if (runtime
->trigger_master
!= substream
)
1077 if (! snd_pcm_running(substream
))
1079 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1080 return 0; /* suspend unconditionally */
1083 static void snd_pcm_post_suspend(struct snd_pcm_substream
*substream
, int state
)
1085 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1086 snd_pcm_trigger_tstamp(substream
);
1087 if (substream
->timer
)
1088 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSUSPEND
,
1089 &runtime
->trigger_tstamp
);
1090 runtime
->status
->suspended_state
= runtime
->status
->state
;
1091 runtime
->status
->state
= SNDRV_PCM_STATE_SUSPENDED
;
1092 wake_up(&runtime
->sleep
);
1093 wake_up(&runtime
->tsleep
);
1096 static struct action_ops snd_pcm_action_suspend
= {
1097 .pre_action
= snd_pcm_pre_suspend
,
1098 .do_action
= snd_pcm_do_suspend
,
1099 .post_action
= snd_pcm_post_suspend
1103 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1104 * @substream: the PCM substream
1106 * After this call, all streams are changed to SUSPENDED state.
1108 * Return: Zero if successful (or @substream is %NULL), or a negative error
1111 int snd_pcm_suspend(struct snd_pcm_substream
*substream
)
1114 unsigned long flags
;
1119 snd_pcm_stream_lock_irqsave(substream
, flags
);
1120 err
= snd_pcm_action(&snd_pcm_action_suspend
, substream
, 0);
1121 snd_pcm_stream_unlock_irqrestore(substream
, flags
);
1125 EXPORT_SYMBOL(snd_pcm_suspend
);
1128 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1129 * @pcm: the PCM instance
1131 * After this call, all streams are changed to SUSPENDED state.
1133 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1135 int snd_pcm_suspend_all(struct snd_pcm
*pcm
)
1137 struct snd_pcm_substream
*substream
;
1138 int stream
, err
= 0;
1143 for (stream
= 0; stream
< 2; stream
++) {
1144 for (substream
= pcm
->streams
[stream
].substream
;
1145 substream
; substream
= substream
->next
) {
1146 /* FIXME: the open/close code should lock this as well */
1147 if (substream
->runtime
== NULL
)
1149 err
= snd_pcm_suspend(substream
);
1150 if (err
< 0 && err
!= -EBUSY
)
1157 EXPORT_SYMBOL(snd_pcm_suspend_all
);
1161 static int snd_pcm_pre_resume(struct snd_pcm_substream
*substream
, int state
)
1163 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1164 if (!(runtime
->info
& SNDRV_PCM_INFO_RESUME
))
1166 runtime
->trigger_master
= substream
;
1170 static int snd_pcm_do_resume(struct snd_pcm_substream
*substream
, int state
)
1172 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1173 if (runtime
->trigger_master
!= substream
)
1175 /* DMA not running previously? */
1176 if (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_RUNNING
&&
1177 (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_DRAINING
||
1178 substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
1180 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_RESUME
);
1183 static void snd_pcm_undo_resume(struct snd_pcm_substream
*substream
, int state
)
1185 if (substream
->runtime
->trigger_master
== substream
&&
1186 snd_pcm_running(substream
))
1187 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1190 static void snd_pcm_post_resume(struct snd_pcm_substream
*substream
, int state
)
1192 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1193 snd_pcm_trigger_tstamp(substream
);
1194 if (substream
->timer
)
1195 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MRESUME
,
1196 &runtime
->trigger_tstamp
);
1197 runtime
->status
->state
= runtime
->status
->suspended_state
;
1200 static struct action_ops snd_pcm_action_resume
= {
1201 .pre_action
= snd_pcm_pre_resume
,
1202 .do_action
= snd_pcm_do_resume
,
1203 .undo_action
= snd_pcm_undo_resume
,
1204 .post_action
= snd_pcm_post_resume
1207 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1209 struct snd_card
*card
= substream
->pcm
->card
;
1212 snd_power_lock(card
);
1213 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1214 res
= snd_pcm_action_lock_irq(&snd_pcm_action_resume
, substream
, 0);
1215 snd_power_unlock(card
);
1221 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1226 #endif /* CONFIG_PM */
1231 * Change the RUNNING stream(s) to XRUN state.
1233 static int snd_pcm_xrun(struct snd_pcm_substream
*substream
)
1235 struct snd_card
*card
= substream
->pcm
->card
;
1236 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1239 snd_power_lock(card
);
1240 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1241 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1246 snd_pcm_stream_lock_irq(substream
);
1247 switch (runtime
->status
->state
) {
1248 case SNDRV_PCM_STATE_XRUN
:
1249 result
= 0; /* already there */
1251 case SNDRV_PCM_STATE_RUNNING
:
1252 result
= snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
1257 snd_pcm_stream_unlock_irq(substream
);
1259 snd_power_unlock(card
);
1266 static int snd_pcm_pre_reset(struct snd_pcm_substream
*substream
, int state
)
1268 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1269 switch (runtime
->status
->state
) {
1270 case SNDRV_PCM_STATE_RUNNING
:
1271 case SNDRV_PCM_STATE_PREPARED
:
1272 case SNDRV_PCM_STATE_PAUSED
:
1273 case SNDRV_PCM_STATE_SUSPENDED
:
1280 static int snd_pcm_do_reset(struct snd_pcm_substream
*substream
, int state
)
1282 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1283 int err
= substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_RESET
, NULL
);
1286 runtime
->hw_ptr_base
= 0;
1287 runtime
->hw_ptr_interrupt
= runtime
->status
->hw_ptr
-
1288 runtime
->status
->hw_ptr
% runtime
->period_size
;
1289 runtime
->silence_start
= runtime
->status
->hw_ptr
;
1290 runtime
->silence_filled
= 0;
1294 static void snd_pcm_post_reset(struct snd_pcm_substream
*substream
, int state
)
1296 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1297 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1298 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
1299 runtime
->silence_size
> 0)
1300 snd_pcm_playback_silence(substream
, ULONG_MAX
);
1303 static struct action_ops snd_pcm_action_reset
= {
1304 .pre_action
= snd_pcm_pre_reset
,
1305 .do_action
= snd_pcm_do_reset
,
1306 .post_action
= snd_pcm_post_reset
1309 static int snd_pcm_reset(struct snd_pcm_substream
*substream
)
1311 return snd_pcm_action_nonatomic(&snd_pcm_action_reset
, substream
, 0);
1317 /* we use the second argument for updating f_flags */
1318 static int snd_pcm_pre_prepare(struct snd_pcm_substream
*substream
,
1321 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1322 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1323 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
)
1325 if (snd_pcm_running(substream
))
1327 substream
->f_flags
= f_flags
;
1331 static int snd_pcm_do_prepare(struct snd_pcm_substream
*substream
, int state
)
1334 err
= substream
->ops
->prepare(substream
);
1337 return snd_pcm_do_reset(substream
, 0);
1340 static void snd_pcm_post_prepare(struct snd_pcm_substream
*substream
, int state
)
1342 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1343 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1344 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_PREPARED
);
1347 static struct action_ops snd_pcm_action_prepare
= {
1348 .pre_action
= snd_pcm_pre_prepare
,
1349 .do_action
= snd_pcm_do_prepare
,
1350 .post_action
= snd_pcm_post_prepare
1354 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1355 * @substream: the PCM substream instance
1356 * @file: file to refer f_flags
1358 * Return: Zero if successful, or a negative error code.
1360 static int snd_pcm_prepare(struct snd_pcm_substream
*substream
,
1364 struct snd_card
*card
= substream
->pcm
->card
;
1368 f_flags
= file
->f_flags
;
1370 f_flags
= substream
->f_flags
;
1372 snd_power_lock(card
);
1373 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1374 res
= snd_pcm_action_nonatomic(&snd_pcm_action_prepare
,
1375 substream
, f_flags
);
1376 snd_power_unlock(card
);
1384 static int snd_pcm_pre_drain_init(struct snd_pcm_substream
*substream
, int state
)
1386 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1387 switch (runtime
->status
->state
) {
1388 case SNDRV_PCM_STATE_OPEN
:
1389 case SNDRV_PCM_STATE_DISCONNECTED
:
1390 case SNDRV_PCM_STATE_SUSPENDED
:
1393 runtime
->trigger_master
= substream
;
1397 static int snd_pcm_do_drain_init(struct snd_pcm_substream
*substream
, int state
)
1399 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1400 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
1401 switch (runtime
->status
->state
) {
1402 case SNDRV_PCM_STATE_PREPARED
:
1403 /* start playback stream if possible */
1404 if (! snd_pcm_playback_empty(substream
)) {
1405 snd_pcm_do_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1406 snd_pcm_post_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1408 runtime
->status
->state
= SNDRV_PCM_STATE_SETUP
;
1411 case SNDRV_PCM_STATE_RUNNING
:
1412 runtime
->status
->state
= SNDRV_PCM_STATE_DRAINING
;
1414 case SNDRV_PCM_STATE_XRUN
:
1415 runtime
->status
->state
= SNDRV_PCM_STATE_SETUP
;
1421 /* stop running stream */
1422 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
) {
1423 int new_state
= snd_pcm_capture_avail(runtime
) > 0 ?
1424 SNDRV_PCM_STATE_DRAINING
: SNDRV_PCM_STATE_SETUP
;
1425 snd_pcm_do_stop(substream
, new_state
);
1426 snd_pcm_post_stop(substream
, new_state
);
1432 static void snd_pcm_post_drain_init(struct snd_pcm_substream
*substream
, int state
)
1436 static struct action_ops snd_pcm_action_drain_init
= {
1437 .pre_action
= snd_pcm_pre_drain_init
,
1438 .do_action
= snd_pcm_do_drain_init
,
1439 .post_action
= snd_pcm_post_drain_init
1442 static int snd_pcm_drop(struct snd_pcm_substream
*substream
);
1445 * Drain the stream(s).
1446 * When the substream is linked, sync until the draining of all playback streams
1448 * After this call, all streams are supposed to be either SETUP or DRAINING
1449 * (capture only) state.
1451 static int snd_pcm_drain(struct snd_pcm_substream
*substream
,
1454 struct snd_card
*card
;
1455 struct snd_pcm_runtime
*runtime
;
1456 struct snd_pcm_substream
*s
;
1461 card
= substream
->pcm
->card
;
1462 runtime
= substream
->runtime
;
1464 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1467 snd_power_lock(card
);
1468 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1469 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1471 snd_power_unlock(card
);
1477 if (file
->f_flags
& O_NONBLOCK
)
1479 } else if (substream
->f_flags
& O_NONBLOCK
)
1482 down_read(&snd_pcm_link_rwsem
);
1483 snd_pcm_stream_lock_irq(substream
);
1485 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1486 snd_pcm_pause(substream
, 0);
1488 /* pre-start/stop - all running streams are changed to DRAINING state */
1489 result
= snd_pcm_action(&snd_pcm_action_drain_init
, substream
, 0);
1492 /* in non-blocking, we don't wait in ioctl but let caller poll */
1500 struct snd_pcm_runtime
*to_check
;
1501 if (signal_pending(current
)) {
1502 result
= -ERESTARTSYS
;
1505 /* find a substream to drain */
1507 snd_pcm_group_for_each_entry(s
, substream
) {
1508 if (s
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
)
1510 runtime
= s
->runtime
;
1511 if (runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
1517 break; /* all drained */
1518 init_waitqueue_entry(&wait
, current
);
1519 add_wait_queue(&to_check
->sleep
, &wait
);
1520 snd_pcm_stream_unlock_irq(substream
);
1521 up_read(&snd_pcm_link_rwsem
);
1522 snd_power_unlock(card
);
1523 if (runtime
->no_period_wakeup
)
1524 tout
= MAX_SCHEDULE_TIMEOUT
;
1527 if (runtime
->rate
) {
1528 long t
= runtime
->period_size
* 2 / runtime
->rate
;
1529 tout
= max(t
, tout
);
1531 tout
= msecs_to_jiffies(tout
* 1000);
1533 tout
= schedule_timeout_interruptible(tout
);
1534 snd_power_lock(card
);
1535 down_read(&snd_pcm_link_rwsem
);
1536 snd_pcm_stream_lock_irq(substream
);
1537 remove_wait_queue(&to_check
->sleep
, &wait
);
1538 if (card
->shutdown
) {
1543 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1546 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1547 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1555 snd_pcm_stream_unlock_irq(substream
);
1556 up_read(&snd_pcm_link_rwsem
);
1557 snd_power_unlock(card
);
1565 * Immediately put all linked substreams into SETUP state.
1567 static int snd_pcm_drop(struct snd_pcm_substream
*substream
)
1569 struct snd_pcm_runtime
*runtime
;
1572 if (PCM_RUNTIME_CHECK(substream
))
1574 runtime
= substream
->runtime
;
1576 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1577 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
||
1578 runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1581 snd_pcm_stream_lock_irq(substream
);
1583 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1584 snd_pcm_pause(substream
, 0);
1586 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1587 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1588 snd_pcm_stream_unlock_irq(substream
);
1594 /* WARNING: Don't forget to fput back the file */
1595 static struct file
*snd_pcm_file_fd(int fd
, int *fput_needed
)
1598 struct inode
*inode
;
1601 file
= fget_light(fd
, fput_needed
);
1604 inode
= file_inode(file
);
1605 if (!S_ISCHR(inode
->i_mode
) ||
1606 imajor(inode
) != snd_major
) {
1607 fput_light(file
, *fput_needed
);
1610 minor
= iminor(inode
);
1611 if (!snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_PLAYBACK
) &&
1612 !snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_CAPTURE
)) {
1613 fput_light(file
, *fput_needed
);
1622 static int snd_pcm_link(struct snd_pcm_substream
*substream
, int fd
)
1626 struct snd_pcm_file
*pcm_file
;
1627 struct snd_pcm_substream
*substream1
;
1628 struct snd_pcm_group
*group
;
1631 file
= snd_pcm_file_fd(fd
, &fput_needed
);
1634 pcm_file
= file
->private_data
;
1635 substream1
= pcm_file
->substream
;
1636 group
= kmalloc(sizeof(*group
), GFP_KERNEL
);
1641 down_write(&snd_pcm_link_rwsem
);
1642 write_lock_irq(&snd_pcm_link_rwlock
);
1643 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1644 substream
->runtime
->status
->state
!= substream1
->runtime
->status
->state
) {
1648 if (snd_pcm_stream_linked(substream1
)) {
1652 if (!snd_pcm_stream_linked(substream
)) {
1653 substream
->group
= group
;
1655 spin_lock_init(&substream
->group
->lock
);
1656 INIT_LIST_HEAD(&substream
->group
->substreams
);
1657 list_add_tail(&substream
->link_list
, &substream
->group
->substreams
);
1658 substream
->group
->count
= 1;
1660 list_add_tail(&substream1
->link_list
, &substream
->group
->substreams
);
1661 substream
->group
->count
++;
1662 substream1
->group
= substream
->group
;
1664 write_unlock_irq(&snd_pcm_link_rwlock
);
1665 up_write(&snd_pcm_link_rwsem
);
1667 snd_card_unref(substream1
->pcm
->card
);
1668 fput_light(file
, fput_needed
);
1673 static void relink_to_local(struct snd_pcm_substream
*substream
)
1675 substream
->group
= &substream
->self_group
;
1676 INIT_LIST_HEAD(&substream
->self_group
.substreams
);
1677 list_add_tail(&substream
->link_list
, &substream
->self_group
.substreams
);
1680 static int snd_pcm_unlink(struct snd_pcm_substream
*substream
)
1682 struct snd_pcm_substream
*s
;
1685 down_write(&snd_pcm_link_rwsem
);
1686 write_lock_irq(&snd_pcm_link_rwlock
);
1687 if (!snd_pcm_stream_linked(substream
)) {
1691 list_del(&substream
->link_list
);
1692 substream
->group
->count
--;
1693 if (substream
->group
->count
== 1) { /* detach the last stream, too */
1694 snd_pcm_group_for_each_entry(s
, substream
) {
1698 kfree(substream
->group
);
1700 relink_to_local(substream
);
1702 write_unlock_irq(&snd_pcm_link_rwlock
);
1703 up_write(&snd_pcm_link_rwsem
);
1710 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params
*params
,
1711 struct snd_pcm_hw_rule
*rule
)
1713 struct snd_interval t
;
1714 snd_interval_mul(hw_param_interval_c(params
, rule
->deps
[0]),
1715 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1716 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1719 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params
*params
,
1720 struct snd_pcm_hw_rule
*rule
)
1722 struct snd_interval t
;
1723 snd_interval_div(hw_param_interval_c(params
, rule
->deps
[0]),
1724 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1725 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1728 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params
*params
,
1729 struct snd_pcm_hw_rule
*rule
)
1731 struct snd_interval t
;
1732 snd_interval_muldivk(hw_param_interval_c(params
, rule
->deps
[0]),
1733 hw_param_interval_c(params
, rule
->deps
[1]),
1734 (unsigned long) rule
->private, &t
);
1735 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1738 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params
*params
,
1739 struct snd_pcm_hw_rule
*rule
)
1741 struct snd_interval t
;
1742 snd_interval_mulkdiv(hw_param_interval_c(params
, rule
->deps
[0]),
1743 (unsigned long) rule
->private,
1744 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1745 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1748 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params
*params
,
1749 struct snd_pcm_hw_rule
*rule
)
1752 struct snd_interval
*i
= hw_param_interval(params
, rule
->deps
[0]);
1754 struct snd_mask
*mask
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1756 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1758 if (! snd_mask_test(mask
, k
))
1760 bits
= snd_pcm_format_physical_width(k
);
1762 continue; /* ignore invalid formats */
1763 if ((unsigned)bits
< i
->min
|| (unsigned)bits
> i
->max
)
1764 snd_mask_reset(&m
, k
);
1766 return snd_mask_refine(mask
, &m
);
1769 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params
*params
,
1770 struct snd_pcm_hw_rule
*rule
)
1772 struct snd_interval t
;
1778 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1780 if (! snd_mask_test(hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
), k
))
1782 bits
= snd_pcm_format_physical_width(k
);
1784 continue; /* ignore invalid formats */
1785 if (t
.min
> (unsigned)bits
)
1787 if (t
.max
< (unsigned)bits
)
1791 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1794 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1795 #error "Change this table"
1798 static unsigned int rates
[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1799 48000, 64000, 88200, 96000, 176400, 192000 };
1801 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates
= {
1802 .count
= ARRAY_SIZE(rates
),
1806 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params
*params
,
1807 struct snd_pcm_hw_rule
*rule
)
1809 struct snd_pcm_hardware
*hw
= rule
->private;
1810 return snd_interval_list(hw_param_interval(params
, rule
->var
),
1811 snd_pcm_known_rates
.count
,
1812 snd_pcm_known_rates
.list
, hw
->rates
);
1815 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params
*params
,
1816 struct snd_pcm_hw_rule
*rule
)
1818 struct snd_interval t
;
1819 struct snd_pcm_substream
*substream
= rule
->private;
1821 t
.max
= substream
->buffer_bytes_max
;
1825 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1828 int snd_pcm_hw_constraints_init(struct snd_pcm_substream
*substream
)
1830 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1831 struct snd_pcm_hw_constraints
*constrs
= &runtime
->hw_constraints
;
1834 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
1835 snd_mask_any(constrs_mask(constrs
, k
));
1838 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
1839 snd_interval_any(constrs_interval(constrs
, k
));
1842 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_CHANNELS
));
1843 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
));
1844 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
));
1845 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
));
1846 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_FRAME_BITS
));
1848 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1849 snd_pcm_hw_rule_format
, NULL
,
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_sample_bits
, NULL
,
1855 SNDRV_PCM_HW_PARAM_FORMAT
,
1856 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1859 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1860 snd_pcm_hw_rule_div
, NULL
,
1861 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1864 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1865 snd_pcm_hw_rule_mul
, NULL
,
1866 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1869 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1870 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1871 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1874 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1875 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1876 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, -1);
1879 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
1880 snd_pcm_hw_rule_div
, NULL
,
1881 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1884 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1885 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1886 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
, -1);
1889 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1890 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1891 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_BUFFER_TIME
, -1);
1894 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIODS
,
1895 snd_pcm_hw_rule_div
, NULL
,
1896 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1899 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1900 snd_pcm_hw_rule_div
, NULL
,
1901 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1904 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1905 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1906 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1909 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1910 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1911 SNDRV_PCM_HW_PARAM_PERIOD_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1914 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1915 snd_pcm_hw_rule_mul
, NULL
,
1916 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1919 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1920 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1921 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1924 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1925 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1926 SNDRV_PCM_HW_PARAM_BUFFER_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1929 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1930 snd_pcm_hw_rule_muldivk
, (void*) 8,
1931 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1934 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1935 snd_pcm_hw_rule_muldivk
, (void*) 8,
1936 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1939 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
1940 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1941 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1944 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME
,
1945 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1946 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1952 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream
*substream
)
1954 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1955 struct snd_pcm_hardware
*hw
= &runtime
->hw
;
1957 unsigned int mask
= 0;
1959 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1960 mask
|= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED
;
1961 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1962 mask
|= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
;
1963 if (hw
->info
& SNDRV_PCM_INFO_MMAP
) {
1964 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1965 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED
;
1966 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1967 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED
;
1968 if (hw
->info
& SNDRV_PCM_INFO_COMPLEX
)
1969 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX
;
1971 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_ACCESS
, mask
);
1975 err
= snd_pcm_hw_constraint_mask64(runtime
, SNDRV_PCM_HW_PARAM_FORMAT
, hw
->formats
);
1979 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_SUBFORMAT
, 1 << SNDRV_PCM_SUBFORMAT_STD
);
1983 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_CHANNELS
,
1984 hw
->channels_min
, hw
->channels_max
);
1988 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_RATE
,
1989 hw
->rate_min
, hw
->rate_max
);
1993 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1994 hw
->period_bytes_min
, hw
->period_bytes_max
);
1998 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIODS
,
1999 hw
->periods_min
, hw
->periods_max
);
2003 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
2004 hw
->period_bytes_min
, hw
->buffer_bytes_max
);
2008 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
2009 snd_pcm_hw_rule_buffer_bytes_max
, substream
,
2010 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, -1);
2015 if (runtime
->dma_bytes
) {
2016 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, 0, runtime
->dma_bytes
);
2021 if (!(hw
->rates
& (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))) {
2022 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
2023 snd_pcm_hw_rule_rate
, hw
,
2024 SNDRV_PCM_HW_PARAM_RATE
, -1);
2029 /* FIXME: this belong to lowlevel */
2030 snd_pcm_hw_constraint_integer(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
);
2035 static void pcm_release_private(struct snd_pcm_substream
*substream
)
2037 snd_pcm_unlink(substream
);
2040 void snd_pcm_release_substream(struct snd_pcm_substream
*substream
)
2042 substream
->ref_count
--;
2043 if (substream
->ref_count
> 0)
2046 snd_pcm_drop(substream
);
2047 if (substream
->hw_opened
) {
2048 if (substream
->ops
->hw_free
!= NULL
)
2049 substream
->ops
->hw_free(substream
);
2050 substream
->ops
->close(substream
);
2051 substream
->hw_opened
= 0;
2053 if (pm_qos_request_active(&substream
->latency_pm_qos_req
))
2054 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
2055 if (substream
->pcm_release
) {
2056 substream
->pcm_release(substream
);
2057 substream
->pcm_release
= NULL
;
2059 snd_pcm_detach_substream(substream
);
2062 EXPORT_SYMBOL(snd_pcm_release_substream
);
2064 int snd_pcm_open_substream(struct snd_pcm
*pcm
, int stream
,
2066 struct snd_pcm_substream
**rsubstream
)
2068 struct snd_pcm_substream
*substream
;
2071 err
= snd_pcm_attach_substream(pcm
, stream
, file
, &substream
);
2074 if (substream
->ref_count
> 1) {
2075 *rsubstream
= substream
;
2079 err
= snd_pcm_hw_constraints_init(substream
);
2081 snd_printd("snd_pcm_hw_constraints_init failed\n");
2085 if ((err
= substream
->ops
->open(substream
)) < 0)
2088 substream
->hw_opened
= 1;
2090 err
= snd_pcm_hw_constraints_complete(substream
);
2092 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2096 *rsubstream
= substream
;
2100 snd_pcm_release_substream(substream
);
2104 EXPORT_SYMBOL(snd_pcm_open_substream
);
2106 static int snd_pcm_open_file(struct file
*file
,
2107 struct snd_pcm
*pcm
,
2110 struct snd_pcm_file
*pcm_file
;
2111 struct snd_pcm_substream
*substream
;
2114 err
= snd_pcm_open_substream(pcm
, stream
, file
, &substream
);
2118 pcm_file
= kzalloc(sizeof(*pcm_file
), GFP_KERNEL
);
2119 if (pcm_file
== NULL
) {
2120 snd_pcm_release_substream(substream
);
2123 pcm_file
->substream
= substream
;
2124 if (substream
->ref_count
== 1) {
2125 substream
->file
= pcm_file
;
2126 substream
->pcm_release
= pcm_release_private
;
2128 file
->private_data
= pcm_file
;
2133 static int snd_pcm_playback_open(struct inode
*inode
, struct file
*file
)
2135 struct snd_pcm
*pcm
;
2136 int err
= nonseekable_open(inode
, file
);
2139 pcm
= snd_lookup_minor_data(iminor(inode
),
2140 SNDRV_DEVICE_TYPE_PCM_PLAYBACK
);
2141 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_PLAYBACK
);
2143 snd_card_unref(pcm
->card
);
2147 static int snd_pcm_capture_open(struct inode
*inode
, struct file
*file
)
2149 struct snd_pcm
*pcm
;
2150 int err
= nonseekable_open(inode
, file
);
2153 pcm
= snd_lookup_minor_data(iminor(inode
),
2154 SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
2155 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_CAPTURE
);
2157 snd_card_unref(pcm
->card
);
2161 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
)
2170 err
= snd_card_file_add(pcm
->card
, file
);
2173 if (!try_module_get(pcm
->card
->module
)) {
2177 init_waitqueue_entry(&wait
, current
);
2178 add_wait_queue(&pcm
->open_wait
, &wait
);
2179 mutex_lock(&pcm
->open_mutex
);
2181 err
= snd_pcm_open_file(file
, pcm
, stream
);
2184 if (err
== -EAGAIN
) {
2185 if (file
->f_flags
& O_NONBLOCK
) {
2191 set_current_state(TASK_INTERRUPTIBLE
);
2192 mutex_unlock(&pcm
->open_mutex
);
2194 mutex_lock(&pcm
->open_mutex
);
2195 if (pcm
->card
->shutdown
) {
2199 if (signal_pending(current
)) {
2204 remove_wait_queue(&pcm
->open_wait
, &wait
);
2205 mutex_unlock(&pcm
->open_mutex
);
2211 module_put(pcm
->card
->module
);
2213 snd_card_file_remove(pcm
->card
, file
);
2218 static int snd_pcm_release(struct inode
*inode
, struct file
*file
)
2220 struct snd_pcm
*pcm
;
2221 struct snd_pcm_substream
*substream
;
2222 struct snd_pcm_file
*pcm_file
;
2224 pcm_file
= file
->private_data
;
2225 substream
= pcm_file
->substream
;
2226 if (snd_BUG_ON(!substream
))
2228 pcm
= substream
->pcm
;
2229 mutex_lock(&pcm
->open_mutex
);
2230 snd_pcm_release_substream(substream
);
2232 mutex_unlock(&pcm
->open_mutex
);
2233 wake_up(&pcm
->open_wait
);
2234 module_put(pcm
->card
->module
);
2235 snd_card_file_remove(pcm
->card
, file
);
2239 static snd_pcm_sframes_t
snd_pcm_playback_rewind(struct snd_pcm_substream
*substream
,
2240 snd_pcm_uframes_t frames
)
2242 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2243 snd_pcm_sframes_t appl_ptr
;
2244 snd_pcm_sframes_t ret
;
2245 snd_pcm_sframes_t hw_avail
;
2250 snd_pcm_stream_lock_irq(substream
);
2251 switch (runtime
->status
->state
) {
2252 case SNDRV_PCM_STATE_PREPARED
:
2254 case SNDRV_PCM_STATE_DRAINING
:
2255 case SNDRV_PCM_STATE_RUNNING
:
2256 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2259 case SNDRV_PCM_STATE_XRUN
:
2262 case SNDRV_PCM_STATE_SUSPENDED
:
2270 hw_avail
= snd_pcm_playback_hw_avail(runtime
);
2271 if (hw_avail
<= 0) {
2275 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2277 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2279 appl_ptr
+= runtime
->boundary
;
2280 runtime
->control
->appl_ptr
= appl_ptr
;
2283 snd_pcm_stream_unlock_irq(substream
);
2287 static snd_pcm_sframes_t
snd_pcm_capture_rewind(struct snd_pcm_substream
*substream
,
2288 snd_pcm_uframes_t frames
)
2290 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2291 snd_pcm_sframes_t appl_ptr
;
2292 snd_pcm_sframes_t ret
;
2293 snd_pcm_sframes_t hw_avail
;
2298 snd_pcm_stream_lock_irq(substream
);
2299 switch (runtime
->status
->state
) {
2300 case SNDRV_PCM_STATE_PREPARED
:
2301 case SNDRV_PCM_STATE_DRAINING
:
2303 case SNDRV_PCM_STATE_RUNNING
:
2304 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2307 case SNDRV_PCM_STATE_XRUN
:
2310 case SNDRV_PCM_STATE_SUSPENDED
:
2318 hw_avail
= snd_pcm_capture_hw_avail(runtime
);
2319 if (hw_avail
<= 0) {
2323 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2325 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2327 appl_ptr
+= runtime
->boundary
;
2328 runtime
->control
->appl_ptr
= appl_ptr
;
2331 snd_pcm_stream_unlock_irq(substream
);
2335 static snd_pcm_sframes_t
snd_pcm_playback_forward(struct snd_pcm_substream
*substream
,
2336 snd_pcm_uframes_t frames
)
2338 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2339 snd_pcm_sframes_t appl_ptr
;
2340 snd_pcm_sframes_t ret
;
2341 snd_pcm_sframes_t avail
;
2346 snd_pcm_stream_lock_irq(substream
);
2347 switch (runtime
->status
->state
) {
2348 case SNDRV_PCM_STATE_PREPARED
:
2349 case SNDRV_PCM_STATE_PAUSED
:
2351 case SNDRV_PCM_STATE_DRAINING
:
2352 case SNDRV_PCM_STATE_RUNNING
:
2353 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2356 case SNDRV_PCM_STATE_XRUN
:
2359 case SNDRV_PCM_STATE_SUSPENDED
:
2367 avail
= snd_pcm_playback_avail(runtime
);
2372 if (frames
> (snd_pcm_uframes_t
)avail
)
2374 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2375 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2376 appl_ptr
-= runtime
->boundary
;
2377 runtime
->control
->appl_ptr
= appl_ptr
;
2380 snd_pcm_stream_unlock_irq(substream
);
2384 static snd_pcm_sframes_t
snd_pcm_capture_forward(struct snd_pcm_substream
*substream
,
2385 snd_pcm_uframes_t frames
)
2387 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2388 snd_pcm_sframes_t appl_ptr
;
2389 snd_pcm_sframes_t ret
;
2390 snd_pcm_sframes_t avail
;
2395 snd_pcm_stream_lock_irq(substream
);
2396 switch (runtime
->status
->state
) {
2397 case SNDRV_PCM_STATE_PREPARED
:
2398 case SNDRV_PCM_STATE_DRAINING
:
2399 case SNDRV_PCM_STATE_PAUSED
:
2401 case SNDRV_PCM_STATE_RUNNING
:
2402 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2405 case SNDRV_PCM_STATE_XRUN
:
2408 case SNDRV_PCM_STATE_SUSPENDED
:
2416 avail
= snd_pcm_capture_avail(runtime
);
2421 if (frames
> (snd_pcm_uframes_t
)avail
)
2423 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2424 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2425 appl_ptr
-= runtime
->boundary
;
2426 runtime
->control
->appl_ptr
= appl_ptr
;
2429 snd_pcm_stream_unlock_irq(substream
);
2433 static int snd_pcm_hwsync(struct snd_pcm_substream
*substream
)
2435 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2438 snd_pcm_stream_lock_irq(substream
);
2439 switch (runtime
->status
->state
) {
2440 case SNDRV_PCM_STATE_DRAINING
:
2441 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2443 case SNDRV_PCM_STATE_RUNNING
:
2444 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2447 case SNDRV_PCM_STATE_PREPARED
:
2448 case SNDRV_PCM_STATE_SUSPENDED
:
2451 case SNDRV_PCM_STATE_XRUN
:
2459 snd_pcm_stream_unlock_irq(substream
);
2463 static int snd_pcm_delay(struct snd_pcm_substream
*substream
,
2464 snd_pcm_sframes_t __user
*res
)
2466 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2468 snd_pcm_sframes_t n
= 0;
2470 snd_pcm_stream_lock_irq(substream
);
2471 switch (runtime
->status
->state
) {
2472 case SNDRV_PCM_STATE_DRAINING
:
2473 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2475 case SNDRV_PCM_STATE_RUNNING
:
2476 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2479 case SNDRV_PCM_STATE_PREPARED
:
2480 case SNDRV_PCM_STATE_SUSPENDED
:
2482 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2483 n
= snd_pcm_playback_hw_avail(runtime
);
2485 n
= snd_pcm_capture_avail(runtime
);
2486 n
+= runtime
->delay
;
2488 case SNDRV_PCM_STATE_XRUN
:
2496 snd_pcm_stream_unlock_irq(substream
);
2498 if (put_user(n
, res
))
2503 static int snd_pcm_sync_ptr(struct snd_pcm_substream
*substream
,
2504 struct snd_pcm_sync_ptr __user
*_sync_ptr
)
2506 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2507 struct snd_pcm_sync_ptr sync_ptr
;
2508 volatile struct snd_pcm_mmap_status
*status
;
2509 volatile struct snd_pcm_mmap_control
*control
;
2512 memset(&sync_ptr
, 0, sizeof(sync_ptr
));
2513 if (get_user(sync_ptr
.flags
, (unsigned __user
*)&(_sync_ptr
->flags
)))
2515 if (copy_from_user(&sync_ptr
.c
.control
, &(_sync_ptr
->c
.control
), sizeof(struct snd_pcm_mmap_control
)))
2517 status
= runtime
->status
;
2518 control
= runtime
->control
;
2519 if (sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_HWSYNC
) {
2520 err
= snd_pcm_hwsync(substream
);
2524 snd_pcm_stream_lock_irq(substream
);
2525 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_APPL
))
2526 control
->appl_ptr
= sync_ptr
.c
.control
.appl_ptr
;
2528 sync_ptr
.c
.control
.appl_ptr
= control
->appl_ptr
;
2529 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_AVAIL_MIN
))
2530 control
->avail_min
= sync_ptr
.c
.control
.avail_min
;
2532 sync_ptr
.c
.control
.avail_min
= control
->avail_min
;
2533 sync_ptr
.s
.status
.state
= status
->state
;
2534 sync_ptr
.s
.status
.hw_ptr
= status
->hw_ptr
;
2535 sync_ptr
.s
.status
.tstamp
= status
->tstamp
;
2536 sync_ptr
.s
.status
.suspended_state
= status
->suspended_state
;
2537 snd_pcm_stream_unlock_irq(substream
);
2538 if (copy_to_user(_sync_ptr
, &sync_ptr
, sizeof(sync_ptr
)))
2543 static int snd_pcm_tstamp(struct snd_pcm_substream
*substream
, int __user
*_arg
)
2545 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2548 if (get_user(arg
, _arg
))
2550 if (arg
< 0 || arg
> SNDRV_PCM_TSTAMP_TYPE_LAST
)
2552 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY
;
2553 if (arg
== SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
)
2554 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
;
2558 static int snd_pcm_common_ioctl1(struct file
*file
,
2559 struct snd_pcm_substream
*substream
,
2560 unsigned int cmd
, void __user
*arg
)
2563 case SNDRV_PCM_IOCTL_PVERSION
:
2564 return put_user(SNDRV_PCM_VERSION
, (int __user
*)arg
) ? -EFAULT
: 0;
2565 case SNDRV_PCM_IOCTL_INFO
:
2566 return snd_pcm_info_user(substream
, arg
);
2567 case SNDRV_PCM_IOCTL_TSTAMP
: /* just for compatibility */
2569 case SNDRV_PCM_IOCTL_TTSTAMP
:
2570 return snd_pcm_tstamp(substream
, arg
);
2571 case SNDRV_PCM_IOCTL_HW_REFINE
:
2572 return snd_pcm_hw_refine_user(substream
, arg
);
2573 case SNDRV_PCM_IOCTL_HW_PARAMS
:
2574 return snd_pcm_hw_params_user(substream
, arg
);
2575 case SNDRV_PCM_IOCTL_HW_FREE
:
2576 return snd_pcm_hw_free(substream
);
2577 case SNDRV_PCM_IOCTL_SW_PARAMS
:
2578 return snd_pcm_sw_params_user(substream
, arg
);
2579 case SNDRV_PCM_IOCTL_STATUS
:
2580 return snd_pcm_status_user(substream
, arg
);
2581 case SNDRV_PCM_IOCTL_CHANNEL_INFO
:
2582 return snd_pcm_channel_info_user(substream
, arg
);
2583 case SNDRV_PCM_IOCTL_PREPARE
:
2584 return snd_pcm_prepare(substream
, file
);
2585 case SNDRV_PCM_IOCTL_RESET
:
2586 return snd_pcm_reset(substream
);
2587 case SNDRV_PCM_IOCTL_START
:
2588 return snd_pcm_action_lock_irq(&snd_pcm_action_start
, substream
, SNDRV_PCM_STATE_RUNNING
);
2589 case SNDRV_PCM_IOCTL_LINK
:
2590 return snd_pcm_link(substream
, (int)(unsigned long) arg
);
2591 case SNDRV_PCM_IOCTL_UNLINK
:
2592 return snd_pcm_unlink(substream
);
2593 case SNDRV_PCM_IOCTL_RESUME
:
2594 return snd_pcm_resume(substream
);
2595 case SNDRV_PCM_IOCTL_XRUN
:
2596 return snd_pcm_xrun(substream
);
2597 case SNDRV_PCM_IOCTL_HWSYNC
:
2598 return snd_pcm_hwsync(substream
);
2599 case SNDRV_PCM_IOCTL_DELAY
:
2600 return snd_pcm_delay(substream
, arg
);
2601 case SNDRV_PCM_IOCTL_SYNC_PTR
:
2602 return snd_pcm_sync_ptr(substream
, arg
);
2603 #ifdef CONFIG_SND_SUPPORT_OLD_API
2604 case SNDRV_PCM_IOCTL_HW_REFINE_OLD
:
2605 return snd_pcm_hw_refine_old_user(substream
, arg
);
2606 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD
:
2607 return snd_pcm_hw_params_old_user(substream
, arg
);
2609 case SNDRV_PCM_IOCTL_DRAIN
:
2610 return snd_pcm_drain(substream
, file
);
2611 case SNDRV_PCM_IOCTL_DROP
:
2612 return snd_pcm_drop(substream
);
2613 case SNDRV_PCM_IOCTL_PAUSE
:
2616 snd_pcm_stream_lock_irq(substream
);
2617 res
= snd_pcm_pause(substream
, (int)(unsigned long)arg
);
2618 snd_pcm_stream_unlock_irq(substream
);
2622 snd_printd("unknown ioctl = 0x%x\n", cmd
);
2626 static int snd_pcm_playback_ioctl1(struct file
*file
,
2627 struct snd_pcm_substream
*substream
,
2628 unsigned int cmd
, void __user
*arg
)
2630 if (snd_BUG_ON(!substream
))
2632 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
2635 case SNDRV_PCM_IOCTL_WRITEI_FRAMES
:
2637 struct snd_xferi xferi
;
2638 struct snd_xferi __user
*_xferi
= arg
;
2639 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2640 snd_pcm_sframes_t result
;
2641 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2643 if (put_user(0, &_xferi
->result
))
2645 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2647 result
= snd_pcm_lib_write(substream
, xferi
.buf
, xferi
.frames
);
2648 __put_user(result
, &_xferi
->result
);
2649 return result
< 0 ? result
: 0;
2651 case SNDRV_PCM_IOCTL_WRITEN_FRAMES
:
2653 struct snd_xfern xfern
;
2654 struct snd_xfern __user
*_xfern
= arg
;
2655 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2657 snd_pcm_sframes_t result
;
2658 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2660 if (runtime
->channels
> 128)
2662 if (put_user(0, &_xfern
->result
))
2664 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2667 bufs
= memdup_user(xfern
.bufs
,
2668 sizeof(void *) * runtime
->channels
);
2670 return PTR_ERR(bufs
);
2671 result
= snd_pcm_lib_writev(substream
, bufs
, xfern
.frames
);
2673 __put_user(result
, &_xfern
->result
);
2674 return result
< 0 ? result
: 0;
2676 case SNDRV_PCM_IOCTL_REWIND
:
2678 snd_pcm_uframes_t frames
;
2679 snd_pcm_uframes_t __user
*_frames
= arg
;
2680 snd_pcm_sframes_t result
;
2681 if (get_user(frames
, _frames
))
2683 if (put_user(0, _frames
))
2685 result
= snd_pcm_playback_rewind(substream
, frames
);
2686 __put_user(result
, _frames
);
2687 return result
< 0 ? result
: 0;
2689 case SNDRV_PCM_IOCTL_FORWARD
:
2691 snd_pcm_uframes_t frames
;
2692 snd_pcm_uframes_t __user
*_frames
= arg
;
2693 snd_pcm_sframes_t result
;
2694 if (get_user(frames
, _frames
))
2696 if (put_user(0, _frames
))
2698 result
= snd_pcm_playback_forward(substream
, frames
);
2699 __put_user(result
, _frames
);
2700 return result
< 0 ? result
: 0;
2703 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2706 static int snd_pcm_capture_ioctl1(struct file
*file
,
2707 struct snd_pcm_substream
*substream
,
2708 unsigned int cmd
, void __user
*arg
)
2710 if (snd_BUG_ON(!substream
))
2712 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_CAPTURE
))
2715 case SNDRV_PCM_IOCTL_READI_FRAMES
:
2717 struct snd_xferi xferi
;
2718 struct snd_xferi __user
*_xferi
= arg
;
2719 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2720 snd_pcm_sframes_t result
;
2721 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2723 if (put_user(0, &_xferi
->result
))
2725 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2727 result
= snd_pcm_lib_read(substream
, xferi
.buf
, xferi
.frames
);
2728 __put_user(result
, &_xferi
->result
);
2729 return result
< 0 ? result
: 0;
2731 case SNDRV_PCM_IOCTL_READN_FRAMES
:
2733 struct snd_xfern xfern
;
2734 struct snd_xfern __user
*_xfern
= arg
;
2735 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2737 snd_pcm_sframes_t result
;
2738 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2740 if (runtime
->channels
> 128)
2742 if (put_user(0, &_xfern
->result
))
2744 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2747 bufs
= memdup_user(xfern
.bufs
,
2748 sizeof(void *) * runtime
->channels
);
2750 return PTR_ERR(bufs
);
2751 result
= snd_pcm_lib_readv(substream
, bufs
, xfern
.frames
);
2753 __put_user(result
, &_xfern
->result
);
2754 return result
< 0 ? result
: 0;
2756 case SNDRV_PCM_IOCTL_REWIND
:
2758 snd_pcm_uframes_t frames
;
2759 snd_pcm_uframes_t __user
*_frames
= arg
;
2760 snd_pcm_sframes_t result
;
2761 if (get_user(frames
, _frames
))
2763 if (put_user(0, _frames
))
2765 result
= snd_pcm_capture_rewind(substream
, frames
);
2766 __put_user(result
, _frames
);
2767 return result
< 0 ? result
: 0;
2769 case SNDRV_PCM_IOCTL_FORWARD
:
2771 snd_pcm_uframes_t frames
;
2772 snd_pcm_uframes_t __user
*_frames
= arg
;
2773 snd_pcm_sframes_t result
;
2774 if (get_user(frames
, _frames
))
2776 if (put_user(0, _frames
))
2778 result
= snd_pcm_capture_forward(substream
, frames
);
2779 __put_user(result
, _frames
);
2780 return result
< 0 ? result
: 0;
2783 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2786 static long snd_pcm_playback_ioctl(struct file
*file
, unsigned int cmd
,
2789 struct snd_pcm_file
*pcm_file
;
2791 pcm_file
= file
->private_data
;
2793 if (((cmd
>> 8) & 0xff) != 'A')
2796 return snd_pcm_playback_ioctl1(file
, pcm_file
->substream
, cmd
,
2797 (void __user
*)arg
);
2800 static long snd_pcm_capture_ioctl(struct file
*file
, unsigned int cmd
,
2803 struct snd_pcm_file
*pcm_file
;
2805 pcm_file
= file
->private_data
;
2807 if (((cmd
>> 8) & 0xff) != 'A')
2810 return snd_pcm_capture_ioctl1(file
, pcm_file
->substream
, cmd
,
2811 (void __user
*)arg
);
2814 int snd_pcm_kernel_ioctl(struct snd_pcm_substream
*substream
,
2815 unsigned int cmd
, void *arg
)
2820 fs
= snd_enter_user();
2821 switch (substream
->stream
) {
2822 case SNDRV_PCM_STREAM_PLAYBACK
:
2823 result
= snd_pcm_playback_ioctl1(NULL
, substream
, cmd
,
2824 (void __user
*)arg
);
2826 case SNDRV_PCM_STREAM_CAPTURE
:
2827 result
= snd_pcm_capture_ioctl1(NULL
, substream
, cmd
,
2828 (void __user
*)arg
);
2838 EXPORT_SYMBOL(snd_pcm_kernel_ioctl
);
2840 static ssize_t
snd_pcm_read(struct file
*file
, char __user
*buf
, size_t count
,
2843 struct snd_pcm_file
*pcm_file
;
2844 struct snd_pcm_substream
*substream
;
2845 struct snd_pcm_runtime
*runtime
;
2846 snd_pcm_sframes_t result
;
2848 pcm_file
= file
->private_data
;
2849 substream
= pcm_file
->substream
;
2850 if (PCM_RUNTIME_CHECK(substream
))
2852 runtime
= substream
->runtime
;
2853 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2855 if (!frame_aligned(runtime
, count
))
2857 count
= bytes_to_frames(runtime
, count
);
2858 result
= snd_pcm_lib_read(substream
, buf
, count
);
2860 result
= frames_to_bytes(runtime
, result
);
2864 static ssize_t
snd_pcm_write(struct file
*file
, const char __user
*buf
,
2865 size_t count
, loff_t
* offset
)
2867 struct snd_pcm_file
*pcm_file
;
2868 struct snd_pcm_substream
*substream
;
2869 struct snd_pcm_runtime
*runtime
;
2870 snd_pcm_sframes_t result
;
2872 pcm_file
= file
->private_data
;
2873 substream
= pcm_file
->substream
;
2874 if (PCM_RUNTIME_CHECK(substream
))
2876 runtime
= substream
->runtime
;
2877 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2879 if (!frame_aligned(runtime
, count
))
2881 count
= bytes_to_frames(runtime
, count
);
2882 result
= snd_pcm_lib_write(substream
, buf
, count
);
2884 result
= frames_to_bytes(runtime
, result
);
2888 static ssize_t
snd_pcm_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
2889 unsigned long nr_segs
, loff_t pos
)
2892 struct snd_pcm_file
*pcm_file
;
2893 struct snd_pcm_substream
*substream
;
2894 struct snd_pcm_runtime
*runtime
;
2895 snd_pcm_sframes_t result
;
2898 snd_pcm_uframes_t frames
;
2900 pcm_file
= iocb
->ki_filp
->private_data
;
2901 substream
= pcm_file
->substream
;
2902 if (PCM_RUNTIME_CHECK(substream
))
2904 runtime
= substream
->runtime
;
2905 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2907 if (nr_segs
> 1024 || nr_segs
!= runtime
->channels
)
2909 if (!frame_aligned(runtime
, iov
->iov_len
))
2911 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2912 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2915 for (i
= 0; i
< nr_segs
; ++i
)
2916 bufs
[i
] = iov
[i
].iov_base
;
2917 result
= snd_pcm_lib_readv(substream
, bufs
, frames
);
2919 result
= frames_to_bytes(runtime
, result
);
2924 static ssize_t
snd_pcm_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
2925 unsigned long nr_segs
, loff_t pos
)
2927 struct snd_pcm_file
*pcm_file
;
2928 struct snd_pcm_substream
*substream
;
2929 struct snd_pcm_runtime
*runtime
;
2930 snd_pcm_sframes_t result
;
2933 snd_pcm_uframes_t frames
;
2935 pcm_file
= iocb
->ki_filp
->private_data
;
2936 substream
= pcm_file
->substream
;
2937 if (PCM_RUNTIME_CHECK(substream
))
2939 runtime
= substream
->runtime
;
2940 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2942 if (nr_segs
> 128 || nr_segs
!= runtime
->channels
||
2943 !frame_aligned(runtime
, iov
->iov_len
))
2945 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2946 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2949 for (i
= 0; i
< nr_segs
; ++i
)
2950 bufs
[i
] = iov
[i
].iov_base
;
2951 result
= snd_pcm_lib_writev(substream
, bufs
, frames
);
2953 result
= frames_to_bytes(runtime
, result
);
2958 static unsigned int snd_pcm_playback_poll(struct file
*file
, poll_table
* wait
)
2960 struct snd_pcm_file
*pcm_file
;
2961 struct snd_pcm_substream
*substream
;
2962 struct snd_pcm_runtime
*runtime
;
2964 snd_pcm_uframes_t avail
;
2966 pcm_file
= file
->private_data
;
2968 substream
= pcm_file
->substream
;
2969 if (PCM_RUNTIME_CHECK(substream
))
2971 runtime
= substream
->runtime
;
2973 poll_wait(file
, &runtime
->sleep
, wait
);
2975 snd_pcm_stream_lock_irq(substream
);
2976 avail
= snd_pcm_playback_avail(runtime
);
2977 switch (runtime
->status
->state
) {
2978 case SNDRV_PCM_STATE_RUNNING
:
2979 case SNDRV_PCM_STATE_PREPARED
:
2980 case SNDRV_PCM_STATE_PAUSED
:
2981 if (avail
>= runtime
->control
->avail_min
) {
2982 mask
= POLLOUT
| POLLWRNORM
;
2986 case SNDRV_PCM_STATE_DRAINING
:
2990 mask
= POLLOUT
| POLLWRNORM
| POLLERR
;
2993 snd_pcm_stream_unlock_irq(substream
);
2997 static unsigned int snd_pcm_capture_poll(struct file
*file
, poll_table
* wait
)
2999 struct snd_pcm_file
*pcm_file
;
3000 struct snd_pcm_substream
*substream
;
3001 struct snd_pcm_runtime
*runtime
;
3003 snd_pcm_uframes_t avail
;
3005 pcm_file
= file
->private_data
;
3007 substream
= pcm_file
->substream
;
3008 if (PCM_RUNTIME_CHECK(substream
))
3010 runtime
= substream
->runtime
;
3012 poll_wait(file
, &runtime
->sleep
, wait
);
3014 snd_pcm_stream_lock_irq(substream
);
3015 avail
= snd_pcm_capture_avail(runtime
);
3016 switch (runtime
->status
->state
) {
3017 case SNDRV_PCM_STATE_RUNNING
:
3018 case SNDRV_PCM_STATE_PREPARED
:
3019 case SNDRV_PCM_STATE_PAUSED
:
3020 if (avail
>= runtime
->control
->avail_min
) {
3021 mask
= POLLIN
| POLLRDNORM
;
3026 case SNDRV_PCM_STATE_DRAINING
:
3028 mask
= POLLIN
| POLLRDNORM
;
3033 mask
= POLLIN
| POLLRDNORM
| POLLERR
;
3036 snd_pcm_stream_unlock_irq(substream
);
3045 * Only on coherent architectures, we can mmap the status and the control records
3046 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3048 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3050 * mmap status record
3052 static int snd_pcm_mmap_status_fault(struct vm_area_struct
*area
,
3053 struct vm_fault
*vmf
)
3055 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3056 struct snd_pcm_runtime
*runtime
;
3058 if (substream
== NULL
)
3059 return VM_FAULT_SIGBUS
;
3060 runtime
= substream
->runtime
;
3061 vmf
->page
= virt_to_page(runtime
->status
);
3062 get_page(vmf
->page
);
3066 static const struct vm_operations_struct snd_pcm_vm_ops_status
=
3068 .fault
= snd_pcm_mmap_status_fault
,
3071 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3072 struct vm_area_struct
*area
)
3075 if (!(area
->vm_flags
& VM_READ
))
3077 size
= area
->vm_end
- area
->vm_start
;
3078 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)))
3080 area
->vm_ops
= &snd_pcm_vm_ops_status
;
3081 area
->vm_private_data
= substream
;
3082 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3087 * mmap control record
3089 static int snd_pcm_mmap_control_fault(struct vm_area_struct
*area
,
3090 struct vm_fault
*vmf
)
3092 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3093 struct snd_pcm_runtime
*runtime
;
3095 if (substream
== NULL
)
3096 return VM_FAULT_SIGBUS
;
3097 runtime
= substream
->runtime
;
3098 vmf
->page
= virt_to_page(runtime
->control
);
3099 get_page(vmf
->page
);
3103 static const struct vm_operations_struct snd_pcm_vm_ops_control
=
3105 .fault
= snd_pcm_mmap_control_fault
,
3108 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3109 struct vm_area_struct
*area
)
3112 if (!(area
->vm_flags
& VM_READ
))
3114 size
= area
->vm_end
- area
->vm_start
;
3115 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
)))
3117 area
->vm_ops
= &snd_pcm_vm_ops_control
;
3118 area
->vm_private_data
= substream
;
3119 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3122 #else /* ! coherent mmap */
3124 * don't support mmap for status and control records.
3126 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3127 struct vm_area_struct
*area
)
3131 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3132 struct vm_area_struct
*area
)
3136 #endif /* coherent mmap */
3138 static inline struct page
*
3139 snd_pcm_default_page_ops(struct snd_pcm_substream
*substream
, unsigned long ofs
)
3141 void *vaddr
= substream
->runtime
->dma_area
+ ofs
;
3142 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3143 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3144 return virt_to_page(CAC_ADDR(vaddr
));
3146 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3147 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
) {
3148 dma_addr_t addr
= substream
->runtime
->dma_addr
+ ofs
;
3149 addr
-= get_dma_offset(substream
->dma_buffer
.dev
.dev
);
3150 /* assume dma_handle set via pfn_to_phys() in
3151 * mm/dma-noncoherent.c
3153 return pfn_to_page(addr
>> PAGE_SHIFT
);
3156 return virt_to_page(vaddr
);
3160 * fault callback for mmapping a RAM page
3162 static int snd_pcm_mmap_data_fault(struct vm_area_struct
*area
,
3163 struct vm_fault
*vmf
)
3165 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3166 struct snd_pcm_runtime
*runtime
;
3167 unsigned long offset
;
3171 if (substream
== NULL
)
3172 return VM_FAULT_SIGBUS
;
3173 runtime
= substream
->runtime
;
3174 offset
= vmf
->pgoff
<< PAGE_SHIFT
;
3175 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3176 if (offset
> dma_bytes
- PAGE_SIZE
)
3177 return VM_FAULT_SIGBUS
;
3178 if (substream
->ops
->page
)
3179 page
= substream
->ops
->page(substream
, offset
);
3181 page
= snd_pcm_default_page_ops(substream
, offset
);
3183 return VM_FAULT_SIGBUS
;
3189 static const struct vm_operations_struct snd_pcm_vm_ops_data
= {
3190 .open
= snd_pcm_mmap_data_open
,
3191 .close
= snd_pcm_mmap_data_close
,
3194 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault
= {
3195 .open
= snd_pcm_mmap_data_open
,
3196 .close
= snd_pcm_mmap_data_close
,
3197 .fault
= snd_pcm_mmap_data_fault
,
3200 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3201 /* This should be defined / handled globally! */
3202 #if defined(CONFIG_ARM) || defined(CONFIG_ARM64)
3203 #define ARCH_HAS_DMA_MMAP_COHERENT
3208 * mmap the DMA buffer on RAM
3210 int snd_pcm_lib_default_mmap(struct snd_pcm_substream
*substream
,
3211 struct vm_area_struct
*area
)
3213 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3214 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3215 if (!substream
->ops
->page
&&
3216 substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3217 return dma_mmap_coherent(substream
->dma_buffer
.dev
.dev
,
3219 substream
->runtime
->dma_area
,
3220 substream
->runtime
->dma_addr
,
3221 area
->vm_end
- area
->vm_start
);
3222 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3223 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
&&
3224 !plat_device_is_coherent(substream
->dma_buffer
.dev
.dev
))
3225 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3226 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3227 /* mmap with fault handler */
3228 area
->vm_ops
= &snd_pcm_vm_ops_data_fault
;
3231 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap
);
3234 * mmap the DMA buffer on I/O memory area
3236 #if SNDRV_PCM_INFO_MMAP_IOMEM
3237 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream
*substream
,
3238 struct vm_area_struct
*area
)
3240 struct snd_pcm_runtime
*runtime
= substream
->runtime
;;
3242 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3243 return vm_iomap_memory(area
, runtime
->dma_addr
, runtime
->dma_bytes
);
3246 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem
);
3247 #endif /* SNDRV_PCM_INFO_MMAP */
3252 int snd_pcm_mmap_data(struct snd_pcm_substream
*substream
, struct file
*file
,
3253 struct vm_area_struct
*area
)
3255 struct snd_pcm_runtime
*runtime
;
3257 unsigned long offset
;
3261 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
3262 if (!(area
->vm_flags
& (VM_WRITE
|VM_READ
)))
3265 if (!(area
->vm_flags
& VM_READ
))
3268 runtime
= substream
->runtime
;
3269 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3271 if (!(runtime
->info
& SNDRV_PCM_INFO_MMAP
))
3273 if (runtime
->access
== SNDRV_PCM_ACCESS_RW_INTERLEAVED
||
3274 runtime
->access
== SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
)
3276 size
= area
->vm_end
- area
->vm_start
;
3277 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3278 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3279 if ((size_t)size
> dma_bytes
)
3281 if (offset
> dma_bytes
- size
)
3284 area
->vm_ops
= &snd_pcm_vm_ops_data
;
3285 area
->vm_private_data
= substream
;
3286 if (substream
->ops
->mmap
)
3287 err
= substream
->ops
->mmap(substream
, area
);
3289 err
= snd_pcm_lib_default_mmap(substream
, area
);
3291 atomic_inc(&substream
->mmap_count
);
3295 EXPORT_SYMBOL(snd_pcm_mmap_data
);
3297 static int snd_pcm_mmap(struct file
*file
, struct vm_area_struct
*area
)
3299 struct snd_pcm_file
* pcm_file
;
3300 struct snd_pcm_substream
*substream
;
3301 unsigned long offset
;
3303 pcm_file
= file
->private_data
;
3304 substream
= pcm_file
->substream
;
3305 if (PCM_RUNTIME_CHECK(substream
))
3308 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3310 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3311 if (pcm_file
->no_compat_mmap
)
3313 return snd_pcm_mmap_status(substream
, file
, area
);
3314 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3315 if (pcm_file
->no_compat_mmap
)
3317 return snd_pcm_mmap_control(substream
, file
, area
);
3319 return snd_pcm_mmap_data(substream
, file
, area
);
3324 static int snd_pcm_fasync(int fd
, struct file
* file
, int on
)
3326 struct snd_pcm_file
* pcm_file
;
3327 struct snd_pcm_substream
*substream
;
3328 struct snd_pcm_runtime
*runtime
;
3330 pcm_file
= file
->private_data
;
3331 substream
= pcm_file
->substream
;
3332 if (PCM_RUNTIME_CHECK(substream
))
3334 runtime
= substream
->runtime
;
3335 return fasync_helper(fd
, file
, on
, &runtime
->fasync
);
3341 #ifdef CONFIG_COMPAT
3342 #include "pcm_compat.c"
3344 #define snd_pcm_ioctl_compat NULL
3348 * To be removed helpers to keep binary compatibility
3351 #ifdef CONFIG_SND_SUPPORT_OLD_API
3352 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3353 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3355 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params
*params
,
3356 struct snd_pcm_hw_params_old
*oparams
)
3360 memset(params
, 0, sizeof(*params
));
3361 params
->flags
= oparams
->flags
;
3362 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3363 params
->masks
[i
].bits
[0] = oparams
->masks
[i
];
3364 memcpy(params
->intervals
, oparams
->intervals
, sizeof(oparams
->intervals
));
3365 params
->rmask
= __OLD_TO_NEW_MASK(oparams
->rmask
);
3366 params
->cmask
= __OLD_TO_NEW_MASK(oparams
->cmask
);
3367 params
->info
= oparams
->info
;
3368 params
->msbits
= oparams
->msbits
;
3369 params
->rate_num
= oparams
->rate_num
;
3370 params
->rate_den
= oparams
->rate_den
;
3371 params
->fifo_size
= oparams
->fifo_size
;
3374 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old
*oparams
,
3375 struct snd_pcm_hw_params
*params
)
3379 memset(oparams
, 0, sizeof(*oparams
));
3380 oparams
->flags
= params
->flags
;
3381 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3382 oparams
->masks
[i
] = params
->masks
[i
].bits
[0];
3383 memcpy(oparams
->intervals
, params
->intervals
, sizeof(oparams
->intervals
));
3384 oparams
->rmask
= __NEW_TO_OLD_MASK(params
->rmask
);
3385 oparams
->cmask
= __NEW_TO_OLD_MASK(params
->cmask
);
3386 oparams
->info
= params
->info
;
3387 oparams
->msbits
= params
->msbits
;
3388 oparams
->rate_num
= params
->rate_num
;
3389 oparams
->rate_den
= params
->rate_den
;
3390 oparams
->fifo_size
= params
->fifo_size
;
3393 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
3394 struct snd_pcm_hw_params_old __user
* _oparams
)
3396 struct snd_pcm_hw_params
*params
;
3397 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3400 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3404 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3405 if (IS_ERR(oparams
)) {
3406 err
= PTR_ERR(oparams
);
3409 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3410 err
= snd_pcm_hw_refine(substream
, params
);
3411 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3412 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3423 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
3424 struct snd_pcm_hw_params_old __user
* _oparams
)
3426 struct snd_pcm_hw_params
*params
;
3427 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3430 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3434 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3435 if (IS_ERR(oparams
)) {
3436 err
= PTR_ERR(oparams
);
3439 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3440 err
= snd_pcm_hw_params(substream
, params
);
3441 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3442 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3452 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3455 static unsigned long snd_pcm_get_unmapped_area(struct file
*file
,
3458 unsigned long pgoff
,
3459 unsigned long flags
)
3461 struct snd_pcm_file
*pcm_file
= file
->private_data
;
3462 struct snd_pcm_substream
*substream
= pcm_file
->substream
;
3463 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
3464 unsigned long offset
= pgoff
<< PAGE_SHIFT
;
3467 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3468 return (unsigned long)runtime
->status
;
3469 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3470 return (unsigned long)runtime
->control
;
3472 return (unsigned long)runtime
->dma_area
+ offset
;
3476 # define snd_pcm_get_unmapped_area NULL
3483 const struct file_operations snd_pcm_f_ops
[2] = {
3485 .owner
= THIS_MODULE
,
3486 .write
= snd_pcm_write
,
3487 .aio_write
= snd_pcm_aio_write
,
3488 .open
= snd_pcm_playback_open
,
3489 .release
= snd_pcm_release
,
3490 .llseek
= no_llseek
,
3491 .poll
= snd_pcm_playback_poll
,
3492 .unlocked_ioctl
= snd_pcm_playback_ioctl
,
3493 .compat_ioctl
= snd_pcm_ioctl_compat
,
3494 .mmap
= snd_pcm_mmap
,
3495 .fasync
= snd_pcm_fasync
,
3496 .get_unmapped_area
= snd_pcm_get_unmapped_area
,
3499 .owner
= THIS_MODULE
,
3500 .read
= snd_pcm_read
,
3501 .aio_read
= snd_pcm_aio_read
,
3502 .open
= snd_pcm_capture_open
,
3503 .release
= snd_pcm_release
,
3504 .llseek
= no_llseek
,
3505 .poll
= snd_pcm_capture_poll
,
3506 .unlocked_ioctl
= snd_pcm_capture_ioctl
,
3507 .compat_ioctl
= snd_pcm_ioctl_compat
,
3508 .mmap
= snd_pcm_mmap
,
3509 .fasync
= snd_pcm_fasync
,
3510 .get_unmapped_area
= snd_pcm_get_unmapped_area
,