2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/file.h>
24 #include <linux/slab.h>
25 #include <linux/smp_lock.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos_params.h>
28 #include <linux/uio.h>
29 #include <sound/core.h>
30 #include <sound/control.h>
31 #include <sound/info.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/timer.h>
35 #include <sound/minors.h>
42 struct snd_pcm_hw_params_old
{
44 unsigned int masks
[SNDRV_PCM_HW_PARAM_SUBFORMAT
-
45 SNDRV_PCM_HW_PARAM_ACCESS
+ 1];
46 struct snd_interval intervals
[SNDRV_PCM_HW_PARAM_TICK_TIME
-
47 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
+ 1];
52 unsigned int rate_num
;
53 unsigned int rate_den
;
54 snd_pcm_uframes_t fifo_size
;
55 unsigned char reserved
[64];
58 #ifdef CONFIG_SND_SUPPORT_OLD_API
59 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
60 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
62 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
63 struct snd_pcm_hw_params_old __user
* _oparams
);
64 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
65 struct snd_pcm_hw_params_old __user
* _oparams
);
67 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
);
73 DEFINE_RWLOCK(snd_pcm_link_rwlock
);
74 EXPORT_SYMBOL(snd_pcm_link_rwlock
);
76 static DECLARE_RWSEM(snd_pcm_link_rwsem
);
78 static inline mm_segment_t
snd_enter_user(void)
80 mm_segment_t fs
= get_fs();
85 static inline void snd_leave_user(mm_segment_t fs
)
92 int snd_pcm_info(struct snd_pcm_substream
*substream
, struct snd_pcm_info
*info
)
94 struct snd_pcm_runtime
*runtime
;
95 struct snd_pcm
*pcm
= substream
->pcm
;
96 struct snd_pcm_str
*pstr
= substream
->pstr
;
98 snd_assert(substream
!= NULL
, return -ENXIO
);
99 memset(info
, 0, sizeof(*info
));
100 info
->card
= pcm
->card
->number
;
101 info
->device
= pcm
->device
;
102 info
->stream
= substream
->stream
;
103 info
->subdevice
= substream
->number
;
104 strlcpy(info
->id
, pcm
->id
, sizeof(info
->id
));
105 strlcpy(info
->name
, pcm
->name
, sizeof(info
->name
));
106 info
->dev_class
= pcm
->dev_class
;
107 info
->dev_subclass
= pcm
->dev_subclass
;
108 info
->subdevices_count
= pstr
->substream_count
;
109 info
->subdevices_avail
= pstr
->substream_count
- pstr
->substream_opened
;
110 strlcpy(info
->subname
, substream
->name
, sizeof(info
->subname
));
111 runtime
= substream
->runtime
;
112 /* AB: FIXME!!! This is definitely nonsense */
114 info
->sync
= runtime
->sync
;
115 substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_INFO
, info
);
120 int snd_pcm_info_user(struct snd_pcm_substream
*substream
,
121 struct snd_pcm_info __user
* _info
)
123 struct snd_pcm_info
*info
;
126 info
= kmalloc(sizeof(*info
), GFP_KERNEL
);
129 err
= snd_pcm_info(substream
, info
);
131 if (copy_to_user(_info
, info
, sizeof(*info
)))
141 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
142 char *snd_pcm_hw_param_names
[] = {
146 HW_PARAM(SAMPLE_BITS
),
147 HW_PARAM(FRAME_BITS
),
150 HW_PARAM(PERIOD_TIME
),
151 HW_PARAM(PERIOD_SIZE
),
152 HW_PARAM(PERIOD_BYTES
),
154 HW_PARAM(BUFFER_TIME
),
155 HW_PARAM(BUFFER_SIZE
),
156 HW_PARAM(BUFFER_BYTES
),
161 int snd_pcm_hw_refine(struct snd_pcm_substream
*substream
,
162 struct snd_pcm_hw_params
*params
)
165 struct snd_pcm_hardware
*hw
;
166 struct snd_interval
*i
= NULL
;
167 struct snd_mask
*m
= NULL
;
168 struct snd_pcm_hw_constraints
*constrs
= &substream
->runtime
->hw_constraints
;
169 unsigned int rstamps
[constrs
->rules_num
];
170 unsigned int vstamps
[SNDRV_PCM_HW_PARAM_LAST_INTERVAL
+ 1];
171 unsigned int stamp
= 2;
175 params
->fifo_size
= 0;
176 if (params
->rmask
& (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS
))
178 if (params
->rmask
& (1 << SNDRV_PCM_HW_PARAM_RATE
)) {
179 params
->rate_num
= 0;
180 params
->rate_den
= 0;
183 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
184 m
= hw_param_mask(params
, k
);
185 if (snd_mask_empty(m
))
187 if (!(params
->rmask
& (1 << k
)))
190 printk("%s = ", snd_pcm_hw_param_names
[k
]);
191 printk("%04x%04x%04x%04x -> ", m
->bits
[3], m
->bits
[2], m
->bits
[1], m
->bits
[0]);
193 changed
= snd_mask_refine(m
, constrs_mask(constrs
, k
));
195 printk("%04x%04x%04x%04x\n", m
->bits
[3], m
->bits
[2], m
->bits
[1], m
->bits
[0]);
198 params
->cmask
|= 1 << k
;
203 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
204 i
= hw_param_interval(params
, k
);
205 if (snd_interval_empty(i
))
207 if (!(params
->rmask
& (1 << k
)))
210 printk("%s = ", snd_pcm_hw_param_names
[k
]);
215 i
->openmin
? '(' : '[', i
->min
,
216 i
->max
, i
->openmax
? ')' : ']');
219 changed
= snd_interval_refine(i
, constrs_interval(constrs
, k
));
224 printk("%c%u %u%c\n",
225 i
->openmin
? '(' : '[', i
->min
,
226 i
->max
, i
->openmax
? ')' : ']');
229 params
->cmask
|= 1 << k
;
234 for (k
= 0; k
< constrs
->rules_num
; k
++)
236 for (k
= 0; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++)
237 vstamps
[k
] = (params
->rmask
& (1 << k
)) ? 1 : 0;
240 for (k
= 0; k
< constrs
->rules_num
; k
++) {
241 struct snd_pcm_hw_rule
*r
= &constrs
->rules
[k
];
244 if (r
->cond
&& !(r
->cond
& params
->flags
))
246 for (d
= 0; r
->deps
[d
] >= 0; d
++) {
247 if (vstamps
[r
->deps
[d
]] > rstamps
[k
]) {
255 printk("Rule %d [%p]: ", k
, r
->func
);
257 printk("%s = ", snd_pcm_hw_param_names
[r
->var
]);
258 if (hw_is_mask(r
->var
)) {
259 m
= hw_param_mask(params
, r
->var
);
260 printk("%x", *m
->bits
);
262 i
= hw_param_interval(params
, r
->var
);
267 i
->openmin
? '(' : '[', i
->min
,
268 i
->max
, i
->openmax
? ')' : ']');
272 changed
= r
->func(params
, r
);
276 if (hw_is_mask(r
->var
))
277 printk("%x", *m
->bits
);
283 i
->openmin
? '(' : '[', i
->min
,
284 i
->max
, i
->openmax
? ')' : ']');
290 if (changed
&& r
->var
>= 0) {
291 params
->cmask
|= (1 << r
->var
);
292 vstamps
[r
->var
] = stamp
;
300 if (!params
->msbits
) {
301 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
);
302 if (snd_interval_single(i
))
303 params
->msbits
= snd_interval_value(i
);
306 if (!params
->rate_den
) {
307 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
308 if (snd_interval_single(i
)) {
309 params
->rate_num
= snd_interval_value(i
);
310 params
->rate_den
= 1;
314 hw
= &substream
->runtime
->hw
;
316 params
->info
= hw
->info
;
317 if (!params
->fifo_size
)
318 params
->fifo_size
= hw
->fifo_size
;
323 EXPORT_SYMBOL(snd_pcm_hw_refine
);
325 static int snd_pcm_hw_refine_user(struct snd_pcm_substream
*substream
,
326 struct snd_pcm_hw_params __user
* _params
)
328 struct snd_pcm_hw_params
*params
;
331 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
336 if (copy_from_user(params
, _params
, sizeof(*params
))) {
340 err
= snd_pcm_hw_refine(substream
, params
);
341 if (copy_to_user(_params
, params
, sizeof(*params
))) {
350 static int period_to_usecs(struct snd_pcm_runtime
*runtime
)
355 return -1; /* invalid */
357 /* take 75% of period time as the deadline */
358 usecs
= (750000 / runtime
->rate
) * runtime
->period_size
;
359 usecs
+= ((750000 % runtime
->rate
) * runtime
->period_size
) /
365 static int snd_pcm_hw_params(struct snd_pcm_substream
*substream
,
366 struct snd_pcm_hw_params
*params
)
368 struct snd_pcm_runtime
*runtime
;
371 snd_pcm_uframes_t frames
;
373 snd_assert(substream
!= NULL
, return -ENXIO
);
374 runtime
= substream
->runtime
;
375 snd_assert(runtime
!= NULL
, return -ENXIO
);
376 snd_pcm_stream_lock_irq(substream
);
377 switch (runtime
->status
->state
) {
378 case SNDRV_PCM_STATE_OPEN
:
379 case SNDRV_PCM_STATE_SETUP
:
380 case SNDRV_PCM_STATE_PREPARED
:
383 snd_pcm_stream_unlock_irq(substream
);
386 snd_pcm_stream_unlock_irq(substream
);
387 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
388 if (!substream
->oss
.oss
)
390 if (atomic_read(&substream
->mmap_count
))
394 err
= snd_pcm_hw_refine(substream
, params
);
398 err
= snd_pcm_hw_params_choose(substream
, params
);
402 if (substream
->ops
->hw_params
!= NULL
) {
403 err
= substream
->ops
->hw_params(substream
, params
);
408 runtime
->access
= params_access(params
);
409 runtime
->format
= params_format(params
);
410 runtime
->subformat
= params_subformat(params
);
411 runtime
->channels
= params_channels(params
);
412 runtime
->rate
= params_rate(params
);
413 runtime
->period_size
= params_period_size(params
);
414 runtime
->periods
= params_periods(params
);
415 runtime
->buffer_size
= params_buffer_size(params
);
416 runtime
->info
= params
->info
;
417 runtime
->rate_num
= params
->rate_num
;
418 runtime
->rate_den
= params
->rate_den
;
420 bits
= snd_pcm_format_physical_width(runtime
->format
);
421 runtime
->sample_bits
= bits
;
422 bits
*= runtime
->channels
;
423 runtime
->frame_bits
= bits
;
425 while (bits
% 8 != 0) {
429 runtime
->byte_align
= bits
/ 8;
430 runtime
->min_align
= frames
;
432 /* Default sw params */
433 runtime
->tstamp_mode
= SNDRV_PCM_TSTAMP_NONE
;
434 runtime
->period_step
= 1;
435 runtime
->control
->avail_min
= runtime
->period_size
;
436 runtime
->start_threshold
= 1;
437 runtime
->stop_threshold
= runtime
->buffer_size
;
438 runtime
->silence_threshold
= 0;
439 runtime
->silence_size
= 0;
440 runtime
->boundary
= runtime
->buffer_size
;
441 while (runtime
->boundary
* 2 <= LONG_MAX
- runtime
->buffer_size
)
442 runtime
->boundary
*= 2;
444 snd_pcm_timer_resolution_change(substream
);
445 runtime
->status
->state
= SNDRV_PCM_STATE_SETUP
;
447 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY
,
448 substream
->latency_id
);
449 if ((usecs
= period_to_usecs(runtime
)) >= 0)
450 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY
,
451 substream
->latency_id
, usecs
);
454 /* hardware might be unuseable from this time,
455 so we force application to retry to set
456 the correct hardware parameter settings */
457 runtime
->status
->state
= SNDRV_PCM_STATE_OPEN
;
458 if (substream
->ops
->hw_free
!= NULL
)
459 substream
->ops
->hw_free(substream
);
463 static int snd_pcm_hw_params_user(struct snd_pcm_substream
*substream
,
464 struct snd_pcm_hw_params __user
* _params
)
466 struct snd_pcm_hw_params
*params
;
469 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
474 if (copy_from_user(params
, _params
, sizeof(*params
))) {
478 err
= snd_pcm_hw_params(substream
, params
);
479 if (copy_to_user(_params
, params
, sizeof(*params
))) {
488 static int snd_pcm_hw_free(struct snd_pcm_substream
*substream
)
490 struct snd_pcm_runtime
*runtime
;
493 snd_assert(substream
!= NULL
, return -ENXIO
);
494 runtime
= substream
->runtime
;
495 snd_assert(runtime
!= NULL
, return -ENXIO
);
496 snd_pcm_stream_lock_irq(substream
);
497 switch (runtime
->status
->state
) {
498 case SNDRV_PCM_STATE_SETUP
:
499 case SNDRV_PCM_STATE_PREPARED
:
502 snd_pcm_stream_unlock_irq(substream
);
505 snd_pcm_stream_unlock_irq(substream
);
506 if (atomic_read(&substream
->mmap_count
))
508 if (substream
->ops
->hw_free
)
509 result
= substream
->ops
->hw_free(substream
);
510 runtime
->status
->state
= SNDRV_PCM_STATE_OPEN
;
511 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY
,
512 substream
->latency_id
);
516 static int snd_pcm_sw_params(struct snd_pcm_substream
*substream
,
517 struct snd_pcm_sw_params
*params
)
519 struct snd_pcm_runtime
*runtime
;
521 snd_assert(substream
!= NULL
, return -ENXIO
);
522 runtime
= substream
->runtime
;
523 snd_assert(runtime
!= NULL
, return -ENXIO
);
524 snd_pcm_stream_lock_irq(substream
);
525 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
526 snd_pcm_stream_unlock_irq(substream
);
529 snd_pcm_stream_unlock_irq(substream
);
531 if (params
->tstamp_mode
> SNDRV_PCM_TSTAMP_LAST
)
533 if (params
->avail_min
== 0)
535 if (params
->silence_size
>= runtime
->boundary
) {
536 if (params
->silence_threshold
!= 0)
539 if (params
->silence_size
> params
->silence_threshold
)
541 if (params
->silence_threshold
> runtime
->buffer_size
)
544 snd_pcm_stream_lock_irq(substream
);
545 runtime
->tstamp_mode
= params
->tstamp_mode
;
546 runtime
->period_step
= params
->period_step
;
547 runtime
->control
->avail_min
= params
->avail_min
;
548 runtime
->start_threshold
= params
->start_threshold
;
549 runtime
->stop_threshold
= params
->stop_threshold
;
550 runtime
->silence_threshold
= params
->silence_threshold
;
551 runtime
->silence_size
= params
->silence_size
;
552 params
->boundary
= runtime
->boundary
;
553 if (snd_pcm_running(substream
)) {
554 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
555 runtime
->silence_size
> 0)
556 snd_pcm_playback_silence(substream
, ULONG_MAX
);
557 wake_up(&runtime
->sleep
);
559 snd_pcm_stream_unlock_irq(substream
);
563 static int snd_pcm_sw_params_user(struct snd_pcm_substream
*substream
,
564 struct snd_pcm_sw_params __user
* _params
)
566 struct snd_pcm_sw_params params
;
568 if (copy_from_user(¶ms
, _params
, sizeof(params
)))
570 err
= snd_pcm_sw_params(substream
, ¶ms
);
571 if (copy_to_user(_params
, ¶ms
, sizeof(params
)))
576 int snd_pcm_status(struct snd_pcm_substream
*substream
,
577 struct snd_pcm_status
*status
)
579 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
581 snd_pcm_stream_lock_irq(substream
);
582 status
->state
= runtime
->status
->state
;
583 status
->suspended_state
= runtime
->status
->suspended_state
;
584 if (status
->state
== SNDRV_PCM_STATE_OPEN
)
586 status
->trigger_tstamp
= runtime
->trigger_tstamp
;
587 if (snd_pcm_running(substream
)) {
588 snd_pcm_update_hw_ptr(substream
);
589 if (runtime
->tstamp_mode
== SNDRV_PCM_TSTAMP_ENABLE
) {
590 status
->tstamp
= runtime
->status
->tstamp
;
594 snd_pcm_gettime(runtime
, &status
->tstamp
);
596 status
->appl_ptr
= runtime
->control
->appl_ptr
;
597 status
->hw_ptr
= runtime
->status
->hw_ptr
;
598 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
599 status
->avail
= snd_pcm_playback_avail(runtime
);
600 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
||
601 runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
)
602 status
->delay
= runtime
->buffer_size
- status
->avail
;
606 status
->avail
= snd_pcm_capture_avail(runtime
);
607 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
)
608 status
->delay
= status
->avail
;
612 status
->avail_max
= runtime
->avail_max
;
613 status
->overrange
= runtime
->overrange
;
614 runtime
->avail_max
= 0;
615 runtime
->overrange
= 0;
617 snd_pcm_stream_unlock_irq(substream
);
621 static int snd_pcm_status_user(struct snd_pcm_substream
*substream
,
622 struct snd_pcm_status __user
* _status
)
624 struct snd_pcm_status status
;
625 struct snd_pcm_runtime
*runtime
;
628 snd_assert(substream
!= NULL
, return -ENXIO
);
629 runtime
= substream
->runtime
;
630 memset(&status
, 0, sizeof(status
));
631 res
= snd_pcm_status(substream
, &status
);
634 if (copy_to_user(_status
, &status
, sizeof(status
)))
639 static int snd_pcm_channel_info(struct snd_pcm_substream
*substream
,
640 struct snd_pcm_channel_info
* info
)
642 struct snd_pcm_runtime
*runtime
;
643 unsigned int channel
;
645 snd_assert(substream
!= NULL
, return -ENXIO
);
646 channel
= info
->channel
;
647 runtime
= substream
->runtime
;
648 snd_pcm_stream_lock_irq(substream
);
649 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
650 snd_pcm_stream_unlock_irq(substream
);
653 snd_pcm_stream_unlock_irq(substream
);
654 if (channel
>= runtime
->channels
)
656 memset(info
, 0, sizeof(*info
));
657 info
->channel
= channel
;
658 return substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_CHANNEL_INFO
, info
);
661 static int snd_pcm_channel_info_user(struct snd_pcm_substream
*substream
,
662 struct snd_pcm_channel_info __user
* _info
)
664 struct snd_pcm_channel_info info
;
667 if (copy_from_user(&info
, _info
, sizeof(info
)))
669 res
= snd_pcm_channel_info(substream
, &info
);
672 if (copy_to_user(_info
, &info
, sizeof(info
)))
677 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream
*substream
)
679 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
680 if (runtime
->trigger_master
== NULL
)
682 if (runtime
->trigger_master
== substream
) {
683 snd_pcm_gettime(runtime
, &runtime
->trigger_tstamp
);
685 snd_pcm_trigger_tstamp(runtime
->trigger_master
);
686 runtime
->trigger_tstamp
= runtime
->trigger_master
->runtime
->trigger_tstamp
;
688 runtime
->trigger_master
= NULL
;
692 int (*pre_action
)(struct snd_pcm_substream
*substream
, int state
);
693 int (*do_action
)(struct snd_pcm_substream
*substream
, int state
);
694 void (*undo_action
)(struct snd_pcm_substream
*substream
, int state
);
695 void (*post_action
)(struct snd_pcm_substream
*substream
, int state
);
699 * this functions is core for handling of linked stream
700 * Note: the stream state might be changed also on failure
701 * Note2: call with calling stream lock + link lock
703 static int snd_pcm_action_group(struct action_ops
*ops
,
704 struct snd_pcm_substream
*substream
,
705 int state
, int do_lock
)
707 struct snd_pcm_substream
*s
= NULL
;
708 struct snd_pcm_substream
*s1
;
711 snd_pcm_group_for_each_entry(s
, substream
) {
712 if (do_lock
&& s
!= substream
)
713 spin_lock_nested(&s
->self_group
.lock
,
714 SINGLE_DEPTH_NESTING
);
715 res
= ops
->pre_action(s
, state
);
719 snd_pcm_group_for_each_entry(s
, substream
) {
720 res
= ops
->do_action(s
, state
);
722 if (ops
->undo_action
) {
723 snd_pcm_group_for_each_entry(s1
, substream
) {
724 if (s1
== s
) /* failed stream */
726 ops
->undo_action(s1
, state
);
729 s
= NULL
; /* unlock all */
733 snd_pcm_group_for_each_entry(s
, substream
) {
734 ops
->post_action(s
, state
);
739 snd_pcm_group_for_each_entry(s1
, substream
) {
741 spin_unlock(&s1
->self_group
.lock
);
742 if (s1
== s
) /* end */
750 * Note: call with stream lock
752 static int snd_pcm_action_single(struct action_ops
*ops
,
753 struct snd_pcm_substream
*substream
,
758 res
= ops
->pre_action(substream
, state
);
761 res
= ops
->do_action(substream
, state
);
763 ops
->post_action(substream
, state
);
764 else if (ops
->undo_action
)
765 ops
->undo_action(substream
, state
);
770 * Note: call with stream lock
772 static int snd_pcm_action(struct action_ops
*ops
,
773 struct snd_pcm_substream
*substream
,
778 if (snd_pcm_stream_linked(substream
)) {
779 if (!spin_trylock(&substream
->group
->lock
)) {
780 spin_unlock(&substream
->self_group
.lock
);
781 spin_lock(&substream
->group
->lock
);
782 spin_lock(&substream
->self_group
.lock
);
784 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
785 spin_unlock(&substream
->group
->lock
);
787 res
= snd_pcm_action_single(ops
, substream
, state
);
793 * Note: don't use any locks before
795 static int snd_pcm_action_lock_irq(struct action_ops
*ops
,
796 struct snd_pcm_substream
*substream
,
801 read_lock_irq(&snd_pcm_link_rwlock
);
802 if (snd_pcm_stream_linked(substream
)) {
803 spin_lock(&substream
->group
->lock
);
804 spin_lock(&substream
->self_group
.lock
);
805 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
806 spin_unlock(&substream
->self_group
.lock
);
807 spin_unlock(&substream
->group
->lock
);
809 spin_lock(&substream
->self_group
.lock
);
810 res
= snd_pcm_action_single(ops
, substream
, state
);
811 spin_unlock(&substream
->self_group
.lock
);
813 read_unlock_irq(&snd_pcm_link_rwlock
);
819 static int snd_pcm_action_nonatomic(struct action_ops
*ops
,
820 struct snd_pcm_substream
*substream
,
825 down_read(&snd_pcm_link_rwsem
);
826 if (snd_pcm_stream_linked(substream
))
827 res
= snd_pcm_action_group(ops
, substream
, state
, 0);
829 res
= snd_pcm_action_single(ops
, substream
, state
);
830 up_read(&snd_pcm_link_rwsem
);
837 static int snd_pcm_pre_start(struct snd_pcm_substream
*substream
, int state
)
839 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
840 if (runtime
->status
->state
!= SNDRV_PCM_STATE_PREPARED
)
842 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
843 !snd_pcm_playback_data(substream
))
845 runtime
->trigger_master
= substream
;
849 static int snd_pcm_do_start(struct snd_pcm_substream
*substream
, int state
)
851 if (substream
->runtime
->trigger_master
!= substream
)
853 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_START
);
856 static void snd_pcm_undo_start(struct snd_pcm_substream
*substream
, int state
)
858 if (substream
->runtime
->trigger_master
== substream
)
859 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
862 static void snd_pcm_post_start(struct snd_pcm_substream
*substream
, int state
)
864 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
865 snd_pcm_trigger_tstamp(substream
);
866 runtime
->status
->state
= state
;
867 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
868 runtime
->silence_size
> 0)
869 snd_pcm_playback_silence(substream
, ULONG_MAX
);
870 if (substream
->timer
)
871 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTART
,
872 &runtime
->trigger_tstamp
);
875 static struct action_ops snd_pcm_action_start
= {
876 .pre_action
= snd_pcm_pre_start
,
877 .do_action
= snd_pcm_do_start
,
878 .undo_action
= snd_pcm_undo_start
,
879 .post_action
= snd_pcm_post_start
884 * @substream: the PCM substream instance
886 * Start all linked streams.
888 int snd_pcm_start(struct snd_pcm_substream
*substream
)
890 return snd_pcm_action(&snd_pcm_action_start
, substream
,
891 SNDRV_PCM_STATE_RUNNING
);
897 static int snd_pcm_pre_stop(struct snd_pcm_substream
*substream
, int state
)
899 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
900 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
902 runtime
->trigger_master
= substream
;
906 static int snd_pcm_do_stop(struct snd_pcm_substream
*substream
, int state
)
908 if (substream
->runtime
->trigger_master
== substream
&&
909 snd_pcm_running(substream
))
910 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
911 return 0; /* unconditonally stop all substreams */
914 static void snd_pcm_post_stop(struct snd_pcm_substream
*substream
, int state
)
916 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
917 if (runtime
->status
->state
!= state
) {
918 snd_pcm_trigger_tstamp(substream
);
919 if (substream
->timer
)
920 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTOP
,
921 &runtime
->trigger_tstamp
);
922 runtime
->status
->state
= state
;
924 wake_up(&runtime
->sleep
);
927 static struct action_ops snd_pcm_action_stop
= {
928 .pre_action
= snd_pcm_pre_stop
,
929 .do_action
= snd_pcm_do_stop
,
930 .post_action
= snd_pcm_post_stop
935 * @substream: the PCM substream instance
936 * @state: PCM state after stopping the stream
938 * Try to stop all running streams in the substream group.
939 * The state of each stream is changed to the given value after that unconditionally.
941 int snd_pcm_stop(struct snd_pcm_substream
*substream
, int state
)
943 return snd_pcm_action(&snd_pcm_action_stop
, substream
, state
);
946 EXPORT_SYMBOL(snd_pcm_stop
);
950 * @substream: the PCM substream
952 * Stop the DMA only when the given stream is playback.
953 * The state is changed to SETUP.
954 * Unlike snd_pcm_stop(), this affects only the given stream.
956 int snd_pcm_drain_done(struct snd_pcm_substream
*substream
)
958 return snd_pcm_action_single(&snd_pcm_action_stop
, substream
,
959 SNDRV_PCM_STATE_SETUP
);
965 static int snd_pcm_pre_pause(struct snd_pcm_substream
*substream
, int push
)
967 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
968 if (!(runtime
->info
& SNDRV_PCM_INFO_PAUSE
))
971 if (runtime
->status
->state
!= SNDRV_PCM_STATE_RUNNING
)
973 } else if (runtime
->status
->state
!= SNDRV_PCM_STATE_PAUSED
)
975 runtime
->trigger_master
= substream
;
979 static int snd_pcm_do_pause(struct snd_pcm_substream
*substream
, int push
)
981 if (substream
->runtime
->trigger_master
!= substream
)
983 return substream
->ops
->trigger(substream
,
984 push
? SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
985 SNDRV_PCM_TRIGGER_PAUSE_RELEASE
);
988 static void snd_pcm_undo_pause(struct snd_pcm_substream
*substream
, int push
)
990 if (substream
->runtime
->trigger_master
== substream
)
991 substream
->ops
->trigger(substream
,
992 push
? SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
993 SNDRV_PCM_TRIGGER_PAUSE_PUSH
);
996 static void snd_pcm_post_pause(struct snd_pcm_substream
*substream
, int push
)
998 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
999 snd_pcm_trigger_tstamp(substream
);
1001 runtime
->status
->state
= SNDRV_PCM_STATE_PAUSED
;
1002 if (substream
->timer
)
1003 snd_timer_notify(substream
->timer
,
1004 SNDRV_TIMER_EVENT_MPAUSE
,
1005 &runtime
->trigger_tstamp
);
1006 wake_up(&runtime
->sleep
);
1008 runtime
->status
->state
= SNDRV_PCM_STATE_RUNNING
;
1009 if (substream
->timer
)
1010 snd_timer_notify(substream
->timer
,
1011 SNDRV_TIMER_EVENT_MCONTINUE
,
1012 &runtime
->trigger_tstamp
);
1016 static struct action_ops snd_pcm_action_pause
= {
1017 .pre_action
= snd_pcm_pre_pause
,
1018 .do_action
= snd_pcm_do_pause
,
1019 .undo_action
= snd_pcm_undo_pause
,
1020 .post_action
= snd_pcm_post_pause
1024 * Push/release the pause for all linked streams.
1026 static int snd_pcm_pause(struct snd_pcm_substream
*substream
, int push
)
1028 return snd_pcm_action(&snd_pcm_action_pause
, substream
, push
);
1034 static int snd_pcm_pre_suspend(struct snd_pcm_substream
*substream
, int state
)
1036 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1037 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1039 runtime
->trigger_master
= substream
;
1043 static int snd_pcm_do_suspend(struct snd_pcm_substream
*substream
, int state
)
1045 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1046 if (runtime
->trigger_master
!= substream
)
1048 if (! snd_pcm_running(substream
))
1050 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1051 return 0; /* suspend unconditionally */
1054 static void snd_pcm_post_suspend(struct snd_pcm_substream
*substream
, int state
)
1056 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1057 snd_pcm_trigger_tstamp(substream
);
1058 if (substream
->timer
)
1059 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSUSPEND
,
1060 &runtime
->trigger_tstamp
);
1061 runtime
->status
->suspended_state
= runtime
->status
->state
;
1062 runtime
->status
->state
= SNDRV_PCM_STATE_SUSPENDED
;
1063 wake_up(&runtime
->sleep
);
1066 static struct action_ops snd_pcm_action_suspend
= {
1067 .pre_action
= snd_pcm_pre_suspend
,
1068 .do_action
= snd_pcm_do_suspend
,
1069 .post_action
= snd_pcm_post_suspend
1074 * @substream: the PCM substream
1076 * Trigger SUSPEND to all linked streams.
1077 * After this call, all streams are changed to SUSPENDED state.
1079 int snd_pcm_suspend(struct snd_pcm_substream
*substream
)
1082 unsigned long flags
;
1087 snd_pcm_stream_lock_irqsave(substream
, flags
);
1088 err
= snd_pcm_action(&snd_pcm_action_suspend
, substream
, 0);
1089 snd_pcm_stream_unlock_irqrestore(substream
, flags
);
1093 EXPORT_SYMBOL(snd_pcm_suspend
);
1096 * snd_pcm_suspend_all
1097 * @pcm: the PCM instance
1099 * Trigger SUSPEND to all substreams in the given pcm.
1100 * After this call, all streams are changed to SUSPENDED state.
1102 int snd_pcm_suspend_all(struct snd_pcm
*pcm
)
1104 struct snd_pcm_substream
*substream
;
1105 int stream
, err
= 0;
1110 for (stream
= 0; stream
< 2; stream
++) {
1111 for (substream
= pcm
->streams
[stream
].substream
;
1112 substream
; substream
= substream
->next
) {
1113 /* FIXME: the open/close code should lock this as well */
1114 if (substream
->runtime
== NULL
)
1116 err
= snd_pcm_suspend(substream
);
1117 if (err
< 0 && err
!= -EBUSY
)
1124 EXPORT_SYMBOL(snd_pcm_suspend_all
);
1128 static int snd_pcm_pre_resume(struct snd_pcm_substream
*substream
, int state
)
1130 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1131 if (!(runtime
->info
& SNDRV_PCM_INFO_RESUME
))
1133 runtime
->trigger_master
= substream
;
1137 static int snd_pcm_do_resume(struct snd_pcm_substream
*substream
, int state
)
1139 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1140 if (runtime
->trigger_master
!= substream
)
1142 /* DMA not running previously? */
1143 if (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_RUNNING
&&
1144 (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_DRAINING
||
1145 substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
1147 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_RESUME
);
1150 static void snd_pcm_undo_resume(struct snd_pcm_substream
*substream
, int state
)
1152 if (substream
->runtime
->trigger_master
== substream
&&
1153 snd_pcm_running(substream
))
1154 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1157 static void snd_pcm_post_resume(struct snd_pcm_substream
*substream
, int state
)
1159 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1160 snd_pcm_trigger_tstamp(substream
);
1161 if (substream
->timer
)
1162 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MRESUME
,
1163 &runtime
->trigger_tstamp
);
1164 runtime
->status
->state
= runtime
->status
->suspended_state
;
1167 static struct action_ops snd_pcm_action_resume
= {
1168 .pre_action
= snd_pcm_pre_resume
,
1169 .do_action
= snd_pcm_do_resume
,
1170 .undo_action
= snd_pcm_undo_resume
,
1171 .post_action
= snd_pcm_post_resume
1174 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1176 struct snd_card
*card
= substream
->pcm
->card
;
1179 snd_power_lock(card
);
1180 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1181 res
= snd_pcm_action_lock_irq(&snd_pcm_action_resume
, substream
, 0);
1182 snd_power_unlock(card
);
1188 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1193 #endif /* CONFIG_PM */
1198 * Change the RUNNING stream(s) to XRUN state.
1200 static int snd_pcm_xrun(struct snd_pcm_substream
*substream
)
1202 struct snd_card
*card
= substream
->pcm
->card
;
1203 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1206 snd_power_lock(card
);
1207 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1208 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1213 snd_pcm_stream_lock_irq(substream
);
1214 switch (runtime
->status
->state
) {
1215 case SNDRV_PCM_STATE_XRUN
:
1216 result
= 0; /* already there */
1218 case SNDRV_PCM_STATE_RUNNING
:
1219 result
= snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
1224 snd_pcm_stream_unlock_irq(substream
);
1226 snd_power_unlock(card
);
1233 static int snd_pcm_pre_reset(struct snd_pcm_substream
*substream
, int state
)
1235 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1236 switch (runtime
->status
->state
) {
1237 case SNDRV_PCM_STATE_RUNNING
:
1238 case SNDRV_PCM_STATE_PREPARED
:
1239 case SNDRV_PCM_STATE_PAUSED
:
1240 case SNDRV_PCM_STATE_SUSPENDED
:
1247 static int snd_pcm_do_reset(struct snd_pcm_substream
*substream
, int state
)
1249 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1250 int err
= substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_RESET
, NULL
);
1253 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1254 runtime
->hw_ptr_base
= 0;
1255 runtime
->hw_ptr_interrupt
= runtime
->status
->hw_ptr
-
1256 runtime
->status
->hw_ptr
% runtime
->period_size
;
1257 runtime
->silence_start
= runtime
->status
->hw_ptr
;
1258 runtime
->silence_filled
= 0;
1262 static void snd_pcm_post_reset(struct snd_pcm_substream
*substream
, int state
)
1264 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1265 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1266 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
1267 runtime
->silence_size
> 0)
1268 snd_pcm_playback_silence(substream
, ULONG_MAX
);
1271 static struct action_ops snd_pcm_action_reset
= {
1272 .pre_action
= snd_pcm_pre_reset
,
1273 .do_action
= snd_pcm_do_reset
,
1274 .post_action
= snd_pcm_post_reset
1277 static int snd_pcm_reset(struct snd_pcm_substream
*substream
)
1279 return snd_pcm_action_nonatomic(&snd_pcm_action_reset
, substream
, 0);
1285 /* we use the second argument for updating f_flags */
1286 static int snd_pcm_pre_prepare(struct snd_pcm_substream
*substream
,
1289 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1290 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1291 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
)
1293 if (snd_pcm_running(substream
))
1295 substream
->f_flags
= f_flags
;
1299 static int snd_pcm_do_prepare(struct snd_pcm_substream
*substream
, int state
)
1302 err
= substream
->ops
->prepare(substream
);
1305 return snd_pcm_do_reset(substream
, 0);
1308 static void snd_pcm_post_prepare(struct snd_pcm_substream
*substream
, int state
)
1310 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1311 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1312 runtime
->status
->state
= SNDRV_PCM_STATE_PREPARED
;
1315 static struct action_ops snd_pcm_action_prepare
= {
1316 .pre_action
= snd_pcm_pre_prepare
,
1317 .do_action
= snd_pcm_do_prepare
,
1318 .post_action
= snd_pcm_post_prepare
1323 * @substream: the PCM substream instance
1324 * @file: file to refer f_flags
1326 * Prepare the PCM substream to be triggerable.
1328 static int snd_pcm_prepare(struct snd_pcm_substream
*substream
,
1332 struct snd_card
*card
= substream
->pcm
->card
;
1336 f_flags
= file
->f_flags
;
1338 f_flags
= substream
->f_flags
;
1340 snd_power_lock(card
);
1341 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1342 res
= snd_pcm_action_nonatomic(&snd_pcm_action_prepare
,
1343 substream
, f_flags
);
1344 snd_power_unlock(card
);
1352 static int snd_pcm_pre_drain_init(struct snd_pcm_substream
*substream
, int state
)
1354 if (substream
->f_flags
& O_NONBLOCK
)
1356 substream
->runtime
->trigger_master
= substream
;
1360 static int snd_pcm_do_drain_init(struct snd_pcm_substream
*substream
, int state
)
1362 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1363 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
1364 switch (runtime
->status
->state
) {
1365 case SNDRV_PCM_STATE_PREPARED
:
1366 /* start playback stream if possible */
1367 if (! snd_pcm_playback_empty(substream
)) {
1368 snd_pcm_do_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1369 snd_pcm_post_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1372 case SNDRV_PCM_STATE_RUNNING
:
1373 runtime
->status
->state
= SNDRV_PCM_STATE_DRAINING
;
1379 /* stop running stream */
1380 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
) {
1381 int new_state
= snd_pcm_capture_avail(runtime
) > 0 ?
1382 SNDRV_PCM_STATE_DRAINING
: SNDRV_PCM_STATE_SETUP
;
1383 snd_pcm_do_stop(substream
, new_state
);
1384 snd_pcm_post_stop(substream
, new_state
);
1390 static void snd_pcm_post_drain_init(struct snd_pcm_substream
*substream
, int state
)
1394 static struct action_ops snd_pcm_action_drain_init
= {
1395 .pre_action
= snd_pcm_pre_drain_init
,
1396 .do_action
= snd_pcm_do_drain_init
,
1397 .post_action
= snd_pcm_post_drain_init
1401 struct snd_pcm_substream
*substream
;
1403 snd_pcm_uframes_t stop_threshold
;
1406 static int snd_pcm_drop(struct snd_pcm_substream
*substream
);
1409 * Drain the stream(s).
1410 * When the substream is linked, sync until the draining of all playback streams
1412 * After this call, all streams are supposed to be either SETUP or DRAINING
1413 * (capture only) state.
1415 static int snd_pcm_drain(struct snd_pcm_substream
*substream
)
1417 struct snd_card
*card
;
1418 struct snd_pcm_runtime
*runtime
;
1419 struct snd_pcm_substream
*s
;
1422 struct drain_rec
*drec
, drec_tmp
, *d
;
1424 snd_assert(substream
!= NULL
, return -ENXIO
);
1425 card
= substream
->pcm
->card
;
1426 runtime
= substream
->runtime
;
1428 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1431 snd_power_lock(card
);
1432 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1433 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1435 snd_power_unlock(card
);
1440 /* allocate temporary record for drain sync */
1441 down_read(&snd_pcm_link_rwsem
);
1442 if (snd_pcm_stream_linked(substream
)) {
1443 drec
= kmalloc(substream
->group
->count
* sizeof(*drec
), GFP_KERNEL
);
1445 up_read(&snd_pcm_link_rwsem
);
1446 snd_power_unlock(card
);
1452 /* count only playback streams */
1454 snd_pcm_group_for_each_entry(s
, substream
) {
1455 runtime
= s
->runtime
;
1456 if (s
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
1457 d
= &drec
[num_drecs
++];
1459 init_waitqueue_entry(&d
->wait
, current
);
1460 add_wait_queue(&runtime
->sleep
, &d
->wait
);
1461 /* stop_threshold fixup to avoid endless loop when
1462 * stop_threshold > buffer_size
1464 d
->stop_threshold
= runtime
->stop_threshold
;
1465 if (runtime
->stop_threshold
> runtime
->buffer_size
)
1466 runtime
->stop_threshold
= runtime
->buffer_size
;
1469 up_read(&snd_pcm_link_rwsem
);
1471 snd_pcm_stream_lock_irq(substream
);
1473 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1474 snd_pcm_pause(substream
, 0);
1476 /* pre-start/stop - all running streams are changed to DRAINING state */
1477 result
= snd_pcm_action(&snd_pcm_action_drain_init
, substream
, 0);
1479 snd_pcm_stream_unlock_irq(substream
);
1485 if (signal_pending(current
)) {
1486 result
= -ERESTARTSYS
;
1490 for (i
= 0; i
< num_drecs
; i
++) {
1491 runtime
= drec
[i
].substream
->runtime
;
1492 if (runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
)
1496 break; /* yes, all drained */
1498 set_current_state(TASK_INTERRUPTIBLE
);
1499 snd_pcm_stream_unlock_irq(substream
);
1500 snd_power_unlock(card
);
1501 tout
= schedule_timeout(10 * HZ
);
1502 snd_power_lock(card
);
1503 snd_pcm_stream_lock_irq(substream
);
1505 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1508 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1509 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1516 snd_pcm_stream_unlock_irq(substream
);
1519 for (i
= 0; i
< num_drecs
; i
++) {
1521 runtime
= d
->substream
->runtime
;
1522 remove_wait_queue(&runtime
->sleep
, &d
->wait
);
1523 runtime
->stop_threshold
= d
->stop_threshold
;
1526 if (drec
!= &drec_tmp
)
1528 snd_power_unlock(card
);
1536 * Immediately put all linked substreams into SETUP state.
1538 static int snd_pcm_drop(struct snd_pcm_substream
*substream
)
1540 struct snd_pcm_runtime
*runtime
;
1541 struct snd_card
*card
;
1544 snd_assert(substream
!= NULL
, return -ENXIO
);
1545 runtime
= substream
->runtime
;
1546 card
= substream
->pcm
->card
;
1548 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1549 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
||
1550 runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1553 snd_pcm_stream_lock_irq(substream
);
1555 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1556 snd_pcm_pause(substream
, 0);
1558 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1559 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1560 snd_pcm_stream_unlock_irq(substream
);
1566 /* WARNING: Don't forget to fput back the file */
1567 static struct file
*snd_pcm_file_fd(int fd
)
1570 struct inode
*inode
;
1576 inode
= file
->f_path
.dentry
->d_inode
;
1577 if (!S_ISCHR(inode
->i_mode
) ||
1578 imajor(inode
) != snd_major
) {
1582 minor
= iminor(inode
);
1583 if (!snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_PLAYBACK
) &&
1584 !snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_CAPTURE
)) {
1594 static int snd_pcm_link(struct snd_pcm_substream
*substream
, int fd
)
1598 struct snd_pcm_file
*pcm_file
;
1599 struct snd_pcm_substream
*substream1
;
1601 file
= snd_pcm_file_fd(fd
);
1604 pcm_file
= file
->private_data
;
1605 substream1
= pcm_file
->substream
;
1606 down_write(&snd_pcm_link_rwsem
);
1607 write_lock_irq(&snd_pcm_link_rwlock
);
1608 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1609 substream
->runtime
->status
->state
!= substream1
->runtime
->status
->state
) {
1613 if (snd_pcm_stream_linked(substream1
)) {
1617 if (!snd_pcm_stream_linked(substream
)) {
1618 substream
->group
= kmalloc(sizeof(struct snd_pcm_group
), GFP_ATOMIC
);
1619 if (substream
->group
== NULL
) {
1623 spin_lock_init(&substream
->group
->lock
);
1624 INIT_LIST_HEAD(&substream
->group
->substreams
);
1625 list_add_tail(&substream
->link_list
, &substream
->group
->substreams
);
1626 substream
->group
->count
= 1;
1628 list_add_tail(&substream1
->link_list
, &substream
->group
->substreams
);
1629 substream
->group
->count
++;
1630 substream1
->group
= substream
->group
;
1632 write_unlock_irq(&snd_pcm_link_rwlock
);
1633 up_write(&snd_pcm_link_rwsem
);
1638 static void relink_to_local(struct snd_pcm_substream
*substream
)
1640 substream
->group
= &substream
->self_group
;
1641 INIT_LIST_HEAD(&substream
->self_group
.substreams
);
1642 list_add_tail(&substream
->link_list
, &substream
->self_group
.substreams
);
1645 static int snd_pcm_unlink(struct snd_pcm_substream
*substream
)
1647 struct snd_pcm_substream
*s
;
1650 down_write(&snd_pcm_link_rwsem
);
1651 write_lock_irq(&snd_pcm_link_rwlock
);
1652 if (!snd_pcm_stream_linked(substream
)) {
1656 list_del(&substream
->link_list
);
1657 substream
->group
->count
--;
1658 if (substream
->group
->count
== 1) { /* detach the last stream, too */
1659 snd_pcm_group_for_each_entry(s
, substream
) {
1663 kfree(substream
->group
);
1665 relink_to_local(substream
);
1667 write_unlock_irq(&snd_pcm_link_rwlock
);
1668 up_write(&snd_pcm_link_rwsem
);
1675 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params
*params
,
1676 struct snd_pcm_hw_rule
*rule
)
1678 struct snd_interval t
;
1679 snd_interval_mul(hw_param_interval_c(params
, rule
->deps
[0]),
1680 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1681 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1684 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params
*params
,
1685 struct snd_pcm_hw_rule
*rule
)
1687 struct snd_interval t
;
1688 snd_interval_div(hw_param_interval_c(params
, rule
->deps
[0]),
1689 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1690 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1693 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params
*params
,
1694 struct snd_pcm_hw_rule
*rule
)
1696 struct snd_interval t
;
1697 snd_interval_muldivk(hw_param_interval_c(params
, rule
->deps
[0]),
1698 hw_param_interval_c(params
, rule
->deps
[1]),
1699 (unsigned long) rule
->private, &t
);
1700 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1703 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params
*params
,
1704 struct snd_pcm_hw_rule
*rule
)
1706 struct snd_interval t
;
1707 snd_interval_mulkdiv(hw_param_interval_c(params
, rule
->deps
[0]),
1708 (unsigned long) rule
->private,
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_format(struct snd_pcm_hw_params
*params
,
1714 struct snd_pcm_hw_rule
*rule
)
1717 struct snd_interval
*i
= hw_param_interval(params
, rule
->deps
[0]);
1719 struct snd_mask
*mask
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1721 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1723 if (! snd_mask_test(mask
, k
))
1725 bits
= snd_pcm_format_physical_width(k
);
1727 continue; /* ignore invalid formats */
1728 if ((unsigned)bits
< i
->min
|| (unsigned)bits
> i
->max
)
1729 snd_mask_reset(&m
, k
);
1731 return snd_mask_refine(mask
, &m
);
1734 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params
*params
,
1735 struct snd_pcm_hw_rule
*rule
)
1737 struct snd_interval t
;
1743 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1745 if (! snd_mask_test(hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
), k
))
1747 bits
= snd_pcm_format_physical_width(k
);
1749 continue; /* ignore invalid formats */
1750 if (t
.min
> (unsigned)bits
)
1752 if (t
.max
< (unsigned)bits
)
1756 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1759 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1760 #error "Change this table"
1763 static unsigned int rates
[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1764 48000, 64000, 88200, 96000, 176400, 192000 };
1766 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates
= {
1767 .count
= ARRAY_SIZE(rates
),
1771 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params
*params
,
1772 struct snd_pcm_hw_rule
*rule
)
1774 struct snd_pcm_hardware
*hw
= rule
->private;
1775 return snd_interval_list(hw_param_interval(params
, rule
->var
),
1776 snd_pcm_known_rates
.count
,
1777 snd_pcm_known_rates
.list
, hw
->rates
);
1780 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params
*params
,
1781 struct snd_pcm_hw_rule
*rule
)
1783 struct snd_interval t
;
1784 struct snd_pcm_substream
*substream
= rule
->private;
1786 t
.max
= substream
->buffer_bytes_max
;
1790 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1793 int snd_pcm_hw_constraints_init(struct snd_pcm_substream
*substream
)
1795 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1796 struct snd_pcm_hw_constraints
*constrs
= &runtime
->hw_constraints
;
1799 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
1800 snd_mask_any(constrs_mask(constrs
, k
));
1803 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
1804 snd_interval_any(constrs_interval(constrs
, k
));
1807 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_CHANNELS
));
1808 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
));
1809 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
));
1810 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
));
1811 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_FRAME_BITS
));
1813 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1814 snd_pcm_hw_rule_format
, NULL
,
1815 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1818 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1819 snd_pcm_hw_rule_sample_bits
, NULL
,
1820 SNDRV_PCM_HW_PARAM_FORMAT
,
1821 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1824 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1825 snd_pcm_hw_rule_div
, NULL
,
1826 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1829 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1830 snd_pcm_hw_rule_mul
, NULL
,
1831 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1834 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1835 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1836 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1839 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1840 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1841 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, -1);
1844 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
1845 snd_pcm_hw_rule_div
, NULL
,
1846 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1849 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1850 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1851 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
, -1);
1854 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1855 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1856 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_BUFFER_TIME
, -1);
1859 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIODS
,
1860 snd_pcm_hw_rule_div
, NULL
,
1861 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1864 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1865 snd_pcm_hw_rule_div
, NULL
,
1866 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1869 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1870 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1871 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1874 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1875 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1876 SNDRV_PCM_HW_PARAM_PERIOD_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1879 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1880 snd_pcm_hw_rule_mul
, NULL
,
1881 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1884 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1885 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1886 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1889 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1890 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1891 SNDRV_PCM_HW_PARAM_BUFFER_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1894 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1895 snd_pcm_hw_rule_muldivk
, (void*) 8,
1896 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1899 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1900 snd_pcm_hw_rule_muldivk
, (void*) 8,
1901 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1904 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
1905 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1906 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1909 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME
,
1910 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1911 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1917 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream
*substream
)
1919 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1920 struct snd_pcm_hardware
*hw
= &runtime
->hw
;
1922 unsigned int mask
= 0;
1924 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1925 mask
|= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED
;
1926 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1927 mask
|= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
;
1928 if (hw
->info
& SNDRV_PCM_INFO_MMAP
) {
1929 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1930 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED
;
1931 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1932 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED
;
1933 if (hw
->info
& SNDRV_PCM_INFO_COMPLEX
)
1934 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX
;
1936 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_ACCESS
, mask
);
1937 snd_assert(err
>= 0, return -EINVAL
);
1939 err
= snd_pcm_hw_constraint_mask64(runtime
, SNDRV_PCM_HW_PARAM_FORMAT
, hw
->formats
);
1940 snd_assert(err
>= 0, return -EINVAL
);
1942 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_SUBFORMAT
, 1 << SNDRV_PCM_SUBFORMAT_STD
);
1943 snd_assert(err
>= 0, return -EINVAL
);
1945 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_CHANNELS
,
1946 hw
->channels_min
, hw
->channels_max
);
1947 snd_assert(err
>= 0, return -EINVAL
);
1949 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_RATE
,
1950 hw
->rate_min
, hw
->rate_max
);
1951 snd_assert(err
>= 0, return -EINVAL
);
1953 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1954 hw
->period_bytes_min
, hw
->period_bytes_max
);
1955 snd_assert(err
>= 0, return -EINVAL
);
1957 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIODS
,
1958 hw
->periods_min
, hw
->periods_max
);
1959 snd_assert(err
>= 0, return -EINVAL
);
1961 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1962 hw
->period_bytes_min
, hw
->buffer_bytes_max
);
1963 snd_assert(err
>= 0, return -EINVAL
);
1965 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1966 snd_pcm_hw_rule_buffer_bytes_max
, substream
,
1967 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, -1);
1972 if (runtime
->dma_bytes
) {
1973 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, 0, runtime
->dma_bytes
);
1974 snd_assert(err
>= 0, return -EINVAL
);
1977 if (!(hw
->rates
& (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))) {
1978 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1979 snd_pcm_hw_rule_rate
, hw
,
1980 SNDRV_PCM_HW_PARAM_RATE
, -1);
1985 /* FIXME: this belong to lowlevel */
1986 snd_pcm_hw_constraint_integer(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
);
1991 static void pcm_release_private(struct snd_pcm_substream
*substream
)
1993 snd_pcm_unlink(substream
);
1996 void snd_pcm_release_substream(struct snd_pcm_substream
*substream
)
1998 substream
->ref_count
--;
1999 if (substream
->ref_count
> 0)
2002 snd_pcm_drop(substream
);
2003 if (substream
->hw_opened
) {
2004 if (substream
->ops
->hw_free
!= NULL
)
2005 substream
->ops
->hw_free(substream
);
2006 substream
->ops
->close(substream
);
2007 substream
->hw_opened
= 0;
2009 if (substream
->pcm_release
) {
2010 substream
->pcm_release(substream
);
2011 substream
->pcm_release
= NULL
;
2013 snd_pcm_detach_substream(substream
);
2016 EXPORT_SYMBOL(snd_pcm_release_substream
);
2018 int snd_pcm_open_substream(struct snd_pcm
*pcm
, int stream
,
2020 struct snd_pcm_substream
**rsubstream
)
2022 struct snd_pcm_substream
*substream
;
2025 err
= snd_pcm_attach_substream(pcm
, stream
, file
, &substream
);
2028 if (substream
->ref_count
> 1) {
2029 *rsubstream
= substream
;
2033 err
= snd_pcm_hw_constraints_init(substream
);
2035 snd_printd("snd_pcm_hw_constraints_init failed\n");
2039 if ((err
= substream
->ops
->open(substream
)) < 0)
2042 substream
->hw_opened
= 1;
2044 err
= snd_pcm_hw_constraints_complete(substream
);
2046 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2050 *rsubstream
= substream
;
2054 snd_pcm_release_substream(substream
);
2058 EXPORT_SYMBOL(snd_pcm_open_substream
);
2060 static int snd_pcm_open_file(struct file
*file
,
2061 struct snd_pcm
*pcm
,
2063 struct snd_pcm_file
**rpcm_file
)
2065 struct snd_pcm_file
*pcm_file
;
2066 struct snd_pcm_substream
*substream
;
2067 struct snd_pcm_str
*str
;
2070 snd_assert(rpcm_file
!= NULL
, return -EINVAL
);
2073 err
= snd_pcm_open_substream(pcm
, stream
, file
, &substream
);
2077 pcm_file
= kzalloc(sizeof(*pcm_file
), GFP_KERNEL
);
2078 if (pcm_file
== NULL
) {
2079 snd_pcm_release_substream(substream
);
2082 pcm_file
->substream
= substream
;
2083 if (substream
->ref_count
== 1) {
2084 str
= substream
->pstr
;
2085 substream
->file
= pcm_file
;
2086 substream
->pcm_release
= pcm_release_private
;
2088 file
->private_data
= pcm_file
;
2089 *rpcm_file
= pcm_file
;
2093 static int snd_pcm_playback_open(struct inode
*inode
, struct file
*file
)
2095 struct snd_pcm
*pcm
;
2097 pcm
= snd_lookup_minor_data(iminor(inode
),
2098 SNDRV_DEVICE_TYPE_PCM_PLAYBACK
);
2099 return snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_PLAYBACK
);
2102 static int snd_pcm_capture_open(struct inode
*inode
, struct file
*file
)
2104 struct snd_pcm
*pcm
;
2106 pcm
= snd_lookup_minor_data(iminor(inode
),
2107 SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
2108 return snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_CAPTURE
);
2111 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
)
2114 struct snd_pcm_file
*pcm_file
;
2121 err
= snd_card_file_add(pcm
->card
, file
);
2124 if (!try_module_get(pcm
->card
->module
)) {
2128 init_waitqueue_entry(&wait
, current
);
2129 add_wait_queue(&pcm
->open_wait
, &wait
);
2130 mutex_lock(&pcm
->open_mutex
);
2132 err
= snd_pcm_open_file(file
, pcm
, stream
, &pcm_file
);
2135 if (err
== -EAGAIN
) {
2136 if (file
->f_flags
& O_NONBLOCK
) {
2142 set_current_state(TASK_INTERRUPTIBLE
);
2143 mutex_unlock(&pcm
->open_mutex
);
2145 mutex_lock(&pcm
->open_mutex
);
2146 if (signal_pending(current
)) {
2151 remove_wait_queue(&pcm
->open_wait
, &wait
);
2152 mutex_unlock(&pcm
->open_mutex
);
2158 module_put(pcm
->card
->module
);
2160 snd_card_file_remove(pcm
->card
, file
);
2165 static int snd_pcm_release(struct inode
*inode
, struct file
*file
)
2167 struct snd_pcm
*pcm
;
2168 struct snd_pcm_substream
*substream
;
2169 struct snd_pcm_file
*pcm_file
;
2171 pcm_file
= file
->private_data
;
2172 substream
= pcm_file
->substream
;
2173 snd_assert(substream
!= NULL
, return -ENXIO
);
2174 pcm
= substream
->pcm
;
2175 fasync_helper(-1, file
, 0, &substream
->runtime
->fasync
);
2176 mutex_lock(&pcm
->open_mutex
);
2177 snd_pcm_release_substream(substream
);
2179 mutex_unlock(&pcm
->open_mutex
);
2180 wake_up(&pcm
->open_wait
);
2181 module_put(pcm
->card
->module
);
2182 snd_card_file_remove(pcm
->card
, file
);
2186 static snd_pcm_sframes_t
snd_pcm_playback_rewind(struct snd_pcm_substream
*substream
,
2187 snd_pcm_uframes_t frames
)
2189 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2190 snd_pcm_sframes_t appl_ptr
;
2191 snd_pcm_sframes_t ret
;
2192 snd_pcm_sframes_t hw_avail
;
2197 snd_pcm_stream_lock_irq(substream
);
2198 switch (runtime
->status
->state
) {
2199 case SNDRV_PCM_STATE_PREPARED
:
2201 case SNDRV_PCM_STATE_DRAINING
:
2202 case SNDRV_PCM_STATE_RUNNING
:
2203 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2206 case SNDRV_PCM_STATE_XRUN
:
2214 hw_avail
= snd_pcm_playback_hw_avail(runtime
);
2215 if (hw_avail
<= 0) {
2219 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2221 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2223 appl_ptr
+= runtime
->boundary
;
2224 runtime
->control
->appl_ptr
= appl_ptr
;
2227 snd_pcm_stream_unlock_irq(substream
);
2231 static snd_pcm_sframes_t
snd_pcm_capture_rewind(struct snd_pcm_substream
*substream
,
2232 snd_pcm_uframes_t frames
)
2234 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2235 snd_pcm_sframes_t appl_ptr
;
2236 snd_pcm_sframes_t ret
;
2237 snd_pcm_sframes_t hw_avail
;
2242 snd_pcm_stream_lock_irq(substream
);
2243 switch (runtime
->status
->state
) {
2244 case SNDRV_PCM_STATE_PREPARED
:
2245 case SNDRV_PCM_STATE_DRAINING
:
2247 case SNDRV_PCM_STATE_RUNNING
:
2248 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2251 case SNDRV_PCM_STATE_XRUN
:
2259 hw_avail
= snd_pcm_capture_hw_avail(runtime
);
2260 if (hw_avail
<= 0) {
2264 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2266 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2268 appl_ptr
+= runtime
->boundary
;
2269 runtime
->control
->appl_ptr
= appl_ptr
;
2272 snd_pcm_stream_unlock_irq(substream
);
2276 static snd_pcm_sframes_t
snd_pcm_playback_forward(struct snd_pcm_substream
*substream
,
2277 snd_pcm_uframes_t frames
)
2279 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2280 snd_pcm_sframes_t appl_ptr
;
2281 snd_pcm_sframes_t ret
;
2282 snd_pcm_sframes_t avail
;
2287 snd_pcm_stream_lock_irq(substream
);
2288 switch (runtime
->status
->state
) {
2289 case SNDRV_PCM_STATE_PREPARED
:
2290 case SNDRV_PCM_STATE_PAUSED
:
2292 case SNDRV_PCM_STATE_DRAINING
:
2293 case SNDRV_PCM_STATE_RUNNING
:
2294 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2297 case SNDRV_PCM_STATE_XRUN
:
2305 avail
= snd_pcm_playback_avail(runtime
);
2310 if (frames
> (snd_pcm_uframes_t
)avail
)
2312 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2313 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2314 appl_ptr
-= runtime
->boundary
;
2315 runtime
->control
->appl_ptr
= appl_ptr
;
2318 snd_pcm_stream_unlock_irq(substream
);
2322 static snd_pcm_sframes_t
snd_pcm_capture_forward(struct snd_pcm_substream
*substream
,
2323 snd_pcm_uframes_t frames
)
2325 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2326 snd_pcm_sframes_t appl_ptr
;
2327 snd_pcm_sframes_t ret
;
2328 snd_pcm_sframes_t avail
;
2333 snd_pcm_stream_lock_irq(substream
);
2334 switch (runtime
->status
->state
) {
2335 case SNDRV_PCM_STATE_PREPARED
:
2336 case SNDRV_PCM_STATE_DRAINING
:
2337 case SNDRV_PCM_STATE_PAUSED
:
2339 case SNDRV_PCM_STATE_RUNNING
:
2340 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2343 case SNDRV_PCM_STATE_XRUN
:
2351 avail
= snd_pcm_capture_avail(runtime
);
2356 if (frames
> (snd_pcm_uframes_t
)avail
)
2358 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2359 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2360 appl_ptr
-= runtime
->boundary
;
2361 runtime
->control
->appl_ptr
= appl_ptr
;
2364 snd_pcm_stream_unlock_irq(substream
);
2368 static int snd_pcm_hwsync(struct snd_pcm_substream
*substream
)
2370 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2373 snd_pcm_stream_lock_irq(substream
);
2374 switch (runtime
->status
->state
) {
2375 case SNDRV_PCM_STATE_DRAINING
:
2376 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2378 case SNDRV_PCM_STATE_RUNNING
:
2379 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2382 case SNDRV_PCM_STATE_PREPARED
:
2383 case SNDRV_PCM_STATE_SUSPENDED
:
2386 case SNDRV_PCM_STATE_XRUN
:
2394 snd_pcm_stream_unlock_irq(substream
);
2398 static int snd_pcm_delay(struct snd_pcm_substream
*substream
,
2399 snd_pcm_sframes_t __user
*res
)
2401 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2403 snd_pcm_sframes_t n
= 0;
2405 snd_pcm_stream_lock_irq(substream
);
2406 switch (runtime
->status
->state
) {
2407 case SNDRV_PCM_STATE_DRAINING
:
2408 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2410 case SNDRV_PCM_STATE_RUNNING
:
2411 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2414 case SNDRV_PCM_STATE_PREPARED
:
2415 case SNDRV_PCM_STATE_SUSPENDED
:
2417 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2418 n
= snd_pcm_playback_hw_avail(runtime
);
2420 n
= snd_pcm_capture_avail(runtime
);
2422 case SNDRV_PCM_STATE_XRUN
:
2430 snd_pcm_stream_unlock_irq(substream
);
2432 if (put_user(n
, res
))
2437 static int snd_pcm_sync_ptr(struct snd_pcm_substream
*substream
,
2438 struct snd_pcm_sync_ptr __user
*_sync_ptr
)
2440 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2441 struct snd_pcm_sync_ptr sync_ptr
;
2442 volatile struct snd_pcm_mmap_status
*status
;
2443 volatile struct snd_pcm_mmap_control
*control
;
2446 memset(&sync_ptr
, 0, sizeof(sync_ptr
));
2447 if (get_user(sync_ptr
.flags
, (unsigned __user
*)&(_sync_ptr
->flags
)))
2449 if (copy_from_user(&sync_ptr
.c
.control
, &(_sync_ptr
->c
.control
), sizeof(struct snd_pcm_mmap_control
)))
2451 status
= runtime
->status
;
2452 control
= runtime
->control
;
2453 if (sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_HWSYNC
) {
2454 err
= snd_pcm_hwsync(substream
);
2458 snd_pcm_stream_lock_irq(substream
);
2459 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_APPL
))
2460 control
->appl_ptr
= sync_ptr
.c
.control
.appl_ptr
;
2462 sync_ptr
.c
.control
.appl_ptr
= control
->appl_ptr
;
2463 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_AVAIL_MIN
))
2464 control
->avail_min
= sync_ptr
.c
.control
.avail_min
;
2466 sync_ptr
.c
.control
.avail_min
= control
->avail_min
;
2467 sync_ptr
.s
.status
.state
= status
->state
;
2468 sync_ptr
.s
.status
.hw_ptr
= status
->hw_ptr
;
2469 sync_ptr
.s
.status
.tstamp
= status
->tstamp
;
2470 sync_ptr
.s
.status
.suspended_state
= status
->suspended_state
;
2471 snd_pcm_stream_unlock_irq(substream
);
2472 if (copy_to_user(_sync_ptr
, &sync_ptr
, sizeof(sync_ptr
)))
2477 static int snd_pcm_tstamp(struct snd_pcm_substream
*substream
, int __user
*_arg
)
2479 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2482 if (get_user(arg
, _arg
))
2484 if (arg
< 0 || arg
> SNDRV_PCM_TSTAMP_TYPE_LAST
)
2486 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY
;
2487 if (arg
== SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
)
2488 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
;
2492 static int snd_pcm_common_ioctl1(struct file
*file
,
2493 struct snd_pcm_substream
*substream
,
2494 unsigned int cmd
, void __user
*arg
)
2496 snd_assert(substream
!= NULL
, return -ENXIO
);
2499 case SNDRV_PCM_IOCTL_PVERSION
:
2500 return put_user(SNDRV_PCM_VERSION
, (int __user
*)arg
) ? -EFAULT
: 0;
2501 case SNDRV_PCM_IOCTL_INFO
:
2502 return snd_pcm_info_user(substream
, arg
);
2503 case SNDRV_PCM_IOCTL_TSTAMP
: /* just for compatibility */
2505 case SNDRV_PCM_IOCTL_TTSTAMP
:
2506 return snd_pcm_tstamp(substream
, arg
);
2507 case SNDRV_PCM_IOCTL_HW_REFINE
:
2508 return snd_pcm_hw_refine_user(substream
, arg
);
2509 case SNDRV_PCM_IOCTL_HW_PARAMS
:
2510 return snd_pcm_hw_params_user(substream
, arg
);
2511 case SNDRV_PCM_IOCTL_HW_FREE
:
2512 return snd_pcm_hw_free(substream
);
2513 case SNDRV_PCM_IOCTL_SW_PARAMS
:
2514 return snd_pcm_sw_params_user(substream
, arg
);
2515 case SNDRV_PCM_IOCTL_STATUS
:
2516 return snd_pcm_status_user(substream
, arg
);
2517 case SNDRV_PCM_IOCTL_CHANNEL_INFO
:
2518 return snd_pcm_channel_info_user(substream
, arg
);
2519 case SNDRV_PCM_IOCTL_PREPARE
:
2520 return snd_pcm_prepare(substream
, file
);
2521 case SNDRV_PCM_IOCTL_RESET
:
2522 return snd_pcm_reset(substream
);
2523 case SNDRV_PCM_IOCTL_START
:
2524 return snd_pcm_action_lock_irq(&snd_pcm_action_start
, substream
, SNDRV_PCM_STATE_RUNNING
);
2525 case SNDRV_PCM_IOCTL_LINK
:
2526 return snd_pcm_link(substream
, (int)(unsigned long) arg
);
2527 case SNDRV_PCM_IOCTL_UNLINK
:
2528 return snd_pcm_unlink(substream
);
2529 case SNDRV_PCM_IOCTL_RESUME
:
2530 return snd_pcm_resume(substream
);
2531 case SNDRV_PCM_IOCTL_XRUN
:
2532 return snd_pcm_xrun(substream
);
2533 case SNDRV_PCM_IOCTL_HWSYNC
:
2534 return snd_pcm_hwsync(substream
);
2535 case SNDRV_PCM_IOCTL_DELAY
:
2536 return snd_pcm_delay(substream
, arg
);
2537 case SNDRV_PCM_IOCTL_SYNC_PTR
:
2538 return snd_pcm_sync_ptr(substream
, arg
);
2539 #ifdef CONFIG_SND_SUPPORT_OLD_API
2540 case SNDRV_PCM_IOCTL_HW_REFINE_OLD
:
2541 return snd_pcm_hw_refine_old_user(substream
, arg
);
2542 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD
:
2543 return snd_pcm_hw_params_old_user(substream
, arg
);
2545 case SNDRV_PCM_IOCTL_DRAIN
:
2546 return snd_pcm_drain(substream
);
2547 case SNDRV_PCM_IOCTL_DROP
:
2548 return snd_pcm_drop(substream
);
2549 case SNDRV_PCM_IOCTL_PAUSE
:
2552 snd_pcm_stream_lock_irq(substream
);
2553 res
= snd_pcm_pause(substream
, (int)(unsigned long)arg
);
2554 snd_pcm_stream_unlock_irq(substream
);
2558 snd_printd("unknown ioctl = 0x%x\n", cmd
);
2562 static int snd_pcm_playback_ioctl1(struct file
*file
,
2563 struct snd_pcm_substream
*substream
,
2564 unsigned int cmd
, void __user
*arg
)
2566 snd_assert(substream
!= NULL
, return -ENXIO
);
2567 snd_assert(substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
, return -EINVAL
);
2569 case SNDRV_PCM_IOCTL_WRITEI_FRAMES
:
2571 struct snd_xferi xferi
;
2572 struct snd_xferi __user
*_xferi
= arg
;
2573 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2574 snd_pcm_sframes_t result
;
2575 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2577 if (put_user(0, &_xferi
->result
))
2579 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2581 result
= snd_pcm_lib_write(substream
, xferi
.buf
, xferi
.frames
);
2582 __put_user(result
, &_xferi
->result
);
2583 return result
< 0 ? result
: 0;
2585 case SNDRV_PCM_IOCTL_WRITEN_FRAMES
:
2587 struct snd_xfern xfern
;
2588 struct snd_xfern __user
*_xfern
= arg
;
2589 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2591 snd_pcm_sframes_t result
;
2592 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2594 if (runtime
->channels
> 128)
2596 if (put_user(0, &_xfern
->result
))
2598 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2600 bufs
= kmalloc(sizeof(void *) * runtime
->channels
, GFP_KERNEL
);
2603 if (copy_from_user(bufs
, xfern
.bufs
, sizeof(void *) * runtime
->channels
)) {
2607 result
= snd_pcm_lib_writev(substream
, bufs
, xfern
.frames
);
2609 __put_user(result
, &_xfern
->result
);
2610 return result
< 0 ? result
: 0;
2612 case SNDRV_PCM_IOCTL_REWIND
:
2614 snd_pcm_uframes_t frames
;
2615 snd_pcm_uframes_t __user
*_frames
= arg
;
2616 snd_pcm_sframes_t result
;
2617 if (get_user(frames
, _frames
))
2619 if (put_user(0, _frames
))
2621 result
= snd_pcm_playback_rewind(substream
, frames
);
2622 __put_user(result
, _frames
);
2623 return result
< 0 ? result
: 0;
2625 case SNDRV_PCM_IOCTL_FORWARD
:
2627 snd_pcm_uframes_t frames
;
2628 snd_pcm_uframes_t __user
*_frames
= arg
;
2629 snd_pcm_sframes_t result
;
2630 if (get_user(frames
, _frames
))
2632 if (put_user(0, _frames
))
2634 result
= snd_pcm_playback_forward(substream
, frames
);
2635 __put_user(result
, _frames
);
2636 return result
< 0 ? result
: 0;
2639 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2642 static int snd_pcm_capture_ioctl1(struct file
*file
,
2643 struct snd_pcm_substream
*substream
,
2644 unsigned int cmd
, void __user
*arg
)
2646 snd_assert(substream
!= NULL
, return -ENXIO
);
2647 snd_assert(substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
, return -EINVAL
);
2649 case SNDRV_PCM_IOCTL_READI_FRAMES
:
2651 struct snd_xferi xferi
;
2652 struct snd_xferi __user
*_xferi
= arg
;
2653 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2654 snd_pcm_sframes_t result
;
2655 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2657 if (put_user(0, &_xferi
->result
))
2659 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2661 result
= snd_pcm_lib_read(substream
, xferi
.buf
, xferi
.frames
);
2662 __put_user(result
, &_xferi
->result
);
2663 return result
< 0 ? result
: 0;
2665 case SNDRV_PCM_IOCTL_READN_FRAMES
:
2667 struct snd_xfern xfern
;
2668 struct snd_xfern __user
*_xfern
= arg
;
2669 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2671 snd_pcm_sframes_t result
;
2672 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2674 if (runtime
->channels
> 128)
2676 if (put_user(0, &_xfern
->result
))
2678 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2680 bufs
= kmalloc(sizeof(void *) * runtime
->channels
, GFP_KERNEL
);
2683 if (copy_from_user(bufs
, xfern
.bufs
, sizeof(void *) * runtime
->channels
)) {
2687 result
= snd_pcm_lib_readv(substream
, bufs
, xfern
.frames
);
2689 __put_user(result
, &_xfern
->result
);
2690 return result
< 0 ? result
: 0;
2692 case SNDRV_PCM_IOCTL_REWIND
:
2694 snd_pcm_uframes_t frames
;
2695 snd_pcm_uframes_t __user
*_frames
= arg
;
2696 snd_pcm_sframes_t result
;
2697 if (get_user(frames
, _frames
))
2699 if (put_user(0, _frames
))
2701 result
= snd_pcm_capture_rewind(substream
, frames
);
2702 __put_user(result
, _frames
);
2703 return result
< 0 ? result
: 0;
2705 case SNDRV_PCM_IOCTL_FORWARD
:
2707 snd_pcm_uframes_t frames
;
2708 snd_pcm_uframes_t __user
*_frames
= arg
;
2709 snd_pcm_sframes_t result
;
2710 if (get_user(frames
, _frames
))
2712 if (put_user(0, _frames
))
2714 result
= snd_pcm_capture_forward(substream
, frames
);
2715 __put_user(result
, _frames
);
2716 return result
< 0 ? result
: 0;
2719 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2722 static long snd_pcm_playback_ioctl(struct file
*file
, unsigned int cmd
,
2725 struct snd_pcm_file
*pcm_file
;
2727 pcm_file
= file
->private_data
;
2729 if (((cmd
>> 8) & 0xff) != 'A')
2732 return snd_pcm_playback_ioctl1(file
, pcm_file
->substream
, cmd
,
2733 (void __user
*)arg
);
2736 static long snd_pcm_capture_ioctl(struct file
*file
, unsigned int cmd
,
2739 struct snd_pcm_file
*pcm_file
;
2741 pcm_file
= file
->private_data
;
2743 if (((cmd
>> 8) & 0xff) != 'A')
2746 return snd_pcm_capture_ioctl1(file
, pcm_file
->substream
, cmd
,
2747 (void __user
*)arg
);
2750 int snd_pcm_kernel_ioctl(struct snd_pcm_substream
*substream
,
2751 unsigned int cmd
, void *arg
)
2756 fs
= snd_enter_user();
2757 switch (substream
->stream
) {
2758 case SNDRV_PCM_STREAM_PLAYBACK
:
2759 result
= snd_pcm_playback_ioctl1(NULL
, substream
, cmd
,
2760 (void __user
*)arg
);
2762 case SNDRV_PCM_STREAM_CAPTURE
:
2763 result
= snd_pcm_capture_ioctl1(NULL
, substream
, cmd
,
2764 (void __user
*)arg
);
2774 EXPORT_SYMBOL(snd_pcm_kernel_ioctl
);
2776 static ssize_t
snd_pcm_read(struct file
*file
, char __user
*buf
, size_t count
,
2779 struct snd_pcm_file
*pcm_file
;
2780 struct snd_pcm_substream
*substream
;
2781 struct snd_pcm_runtime
*runtime
;
2782 snd_pcm_sframes_t result
;
2784 pcm_file
= file
->private_data
;
2785 substream
= pcm_file
->substream
;
2786 snd_assert(substream
!= NULL
, return -ENXIO
);
2787 runtime
= substream
->runtime
;
2788 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2790 if (!frame_aligned(runtime
, count
))
2792 count
= bytes_to_frames(runtime
, count
);
2793 result
= snd_pcm_lib_read(substream
, buf
, count
);
2795 result
= frames_to_bytes(runtime
, result
);
2799 static ssize_t
snd_pcm_write(struct file
*file
, const char __user
*buf
,
2800 size_t count
, loff_t
* offset
)
2802 struct snd_pcm_file
*pcm_file
;
2803 struct snd_pcm_substream
*substream
;
2804 struct snd_pcm_runtime
*runtime
;
2805 snd_pcm_sframes_t result
;
2807 pcm_file
= file
->private_data
;
2808 substream
= pcm_file
->substream
;
2809 snd_assert(substream
!= NULL
, result
= -ENXIO
; goto end
);
2810 runtime
= substream
->runtime
;
2811 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
2815 if (!frame_aligned(runtime
, count
)) {
2819 count
= bytes_to_frames(runtime
, count
);
2820 result
= snd_pcm_lib_write(substream
, buf
, count
);
2822 result
= frames_to_bytes(runtime
, result
);
2827 static ssize_t
snd_pcm_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
2828 unsigned long nr_segs
, loff_t pos
)
2831 struct snd_pcm_file
*pcm_file
;
2832 struct snd_pcm_substream
*substream
;
2833 struct snd_pcm_runtime
*runtime
;
2834 snd_pcm_sframes_t result
;
2837 snd_pcm_uframes_t frames
;
2839 pcm_file
= iocb
->ki_filp
->private_data
;
2840 substream
= pcm_file
->substream
;
2841 snd_assert(substream
!= NULL
, return -ENXIO
);
2842 runtime
= substream
->runtime
;
2843 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2845 if (nr_segs
> 1024 || nr_segs
!= runtime
->channels
)
2847 if (!frame_aligned(runtime
, iov
->iov_len
))
2849 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2850 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2853 for (i
= 0; i
< nr_segs
; ++i
)
2854 bufs
[i
] = iov
[i
].iov_base
;
2855 result
= snd_pcm_lib_readv(substream
, bufs
, frames
);
2857 result
= frames_to_bytes(runtime
, result
);
2862 static ssize_t
snd_pcm_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
2863 unsigned long nr_segs
, loff_t pos
)
2865 struct snd_pcm_file
*pcm_file
;
2866 struct snd_pcm_substream
*substream
;
2867 struct snd_pcm_runtime
*runtime
;
2868 snd_pcm_sframes_t result
;
2871 snd_pcm_uframes_t frames
;
2873 pcm_file
= iocb
->ki_filp
->private_data
;
2874 substream
= pcm_file
->substream
;
2875 snd_assert(substream
!= NULL
, result
= -ENXIO
; goto end
);
2876 runtime
= substream
->runtime
;
2877 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
2881 if (nr_segs
> 128 || nr_segs
!= runtime
->channels
||
2882 !frame_aligned(runtime
, iov
->iov_len
)) {
2886 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2887 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2890 for (i
= 0; i
< nr_segs
; ++i
)
2891 bufs
[i
] = iov
[i
].iov_base
;
2892 result
= snd_pcm_lib_writev(substream
, bufs
, frames
);
2894 result
= frames_to_bytes(runtime
, result
);
2900 static unsigned int snd_pcm_playback_poll(struct file
*file
, poll_table
* wait
)
2902 struct snd_pcm_file
*pcm_file
;
2903 struct snd_pcm_substream
*substream
;
2904 struct snd_pcm_runtime
*runtime
;
2906 snd_pcm_uframes_t avail
;
2908 pcm_file
= file
->private_data
;
2910 substream
= pcm_file
->substream
;
2911 snd_assert(substream
!= NULL
, return -ENXIO
);
2912 runtime
= substream
->runtime
;
2914 poll_wait(file
, &runtime
->sleep
, wait
);
2916 snd_pcm_stream_lock_irq(substream
);
2917 avail
= snd_pcm_playback_avail(runtime
);
2918 switch (runtime
->status
->state
) {
2919 case SNDRV_PCM_STATE_RUNNING
:
2920 case SNDRV_PCM_STATE_PREPARED
:
2921 case SNDRV_PCM_STATE_PAUSED
:
2922 if (avail
>= runtime
->control
->avail_min
) {
2923 mask
= POLLOUT
| POLLWRNORM
;
2927 case SNDRV_PCM_STATE_DRAINING
:
2931 mask
= POLLOUT
| POLLWRNORM
| POLLERR
;
2934 snd_pcm_stream_unlock_irq(substream
);
2938 static unsigned int snd_pcm_capture_poll(struct file
*file
, poll_table
* wait
)
2940 struct snd_pcm_file
*pcm_file
;
2941 struct snd_pcm_substream
*substream
;
2942 struct snd_pcm_runtime
*runtime
;
2944 snd_pcm_uframes_t avail
;
2946 pcm_file
= file
->private_data
;
2948 substream
= pcm_file
->substream
;
2949 snd_assert(substream
!= NULL
, return -ENXIO
);
2950 runtime
= substream
->runtime
;
2952 poll_wait(file
, &runtime
->sleep
, wait
);
2954 snd_pcm_stream_lock_irq(substream
);
2955 avail
= snd_pcm_capture_avail(runtime
);
2956 switch (runtime
->status
->state
) {
2957 case SNDRV_PCM_STATE_RUNNING
:
2958 case SNDRV_PCM_STATE_PREPARED
:
2959 case SNDRV_PCM_STATE_PAUSED
:
2960 if (avail
>= runtime
->control
->avail_min
) {
2961 mask
= POLLIN
| POLLRDNORM
;
2966 case SNDRV_PCM_STATE_DRAINING
:
2968 mask
= POLLIN
| POLLRDNORM
;
2973 mask
= POLLIN
| POLLRDNORM
| POLLERR
;
2976 snd_pcm_stream_unlock_irq(substream
);
2985 * Only on coherent architectures, we can mmap the status and the control records
2986 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
2988 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2990 * mmap status record
2992 static int snd_pcm_mmap_status_fault(struct vm_area_struct
*area
,
2993 struct vm_fault
*vmf
)
2995 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
2996 struct snd_pcm_runtime
*runtime
;
2998 if (substream
== NULL
)
2999 return VM_FAULT_SIGBUS
;
3000 runtime
= substream
->runtime
;
3001 vmf
->page
= virt_to_page(runtime
->status
);
3002 get_page(vmf
->page
);
3006 static struct vm_operations_struct snd_pcm_vm_ops_status
=
3008 .fault
= snd_pcm_mmap_status_fault
,
3011 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3012 struct vm_area_struct
*area
)
3014 struct snd_pcm_runtime
*runtime
;
3016 if (!(area
->vm_flags
& VM_READ
))
3018 runtime
= substream
->runtime
;
3019 snd_assert(runtime
!= NULL
, return -EAGAIN
);
3020 size
= area
->vm_end
- area
->vm_start
;
3021 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)))
3023 area
->vm_ops
= &snd_pcm_vm_ops_status
;
3024 area
->vm_private_data
= substream
;
3025 area
->vm_flags
|= VM_RESERVED
;
3030 * mmap control record
3032 static int snd_pcm_mmap_control_fault(struct vm_area_struct
*area
,
3033 struct vm_fault
*vmf
)
3035 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3036 struct snd_pcm_runtime
*runtime
;
3038 if (substream
== NULL
)
3039 return VM_FAULT_SIGBUS
;
3040 runtime
= substream
->runtime
;
3041 vmf
->page
= virt_to_page(runtime
->control
);
3042 get_page(vmf
->page
);
3046 static struct vm_operations_struct snd_pcm_vm_ops_control
=
3048 .fault
= snd_pcm_mmap_control_fault
,
3051 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3052 struct vm_area_struct
*area
)
3054 struct snd_pcm_runtime
*runtime
;
3056 if (!(area
->vm_flags
& VM_READ
))
3058 runtime
= substream
->runtime
;
3059 snd_assert(runtime
!= NULL
, return -EAGAIN
);
3060 size
= area
->vm_end
- area
->vm_start
;
3061 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
)))
3063 area
->vm_ops
= &snd_pcm_vm_ops_control
;
3064 area
->vm_private_data
= substream
;
3065 area
->vm_flags
|= VM_RESERVED
;
3068 #else /* ! coherent mmap */
3070 * don't support mmap for status and control records.
3072 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3073 struct vm_area_struct
*area
)
3077 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3078 struct vm_area_struct
*area
)
3082 #endif /* coherent mmap */
3085 * fault callback for mmapping a RAM page
3087 static int snd_pcm_mmap_data_fault(struct vm_area_struct
*area
,
3088 struct vm_fault
*vmf
)
3090 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3091 struct snd_pcm_runtime
*runtime
;
3092 unsigned long offset
;
3097 if (substream
== NULL
)
3098 return VM_FAULT_SIGBUS
;
3099 runtime
= substream
->runtime
;
3100 offset
= vmf
->pgoff
<< PAGE_SHIFT
;
3101 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3102 if (offset
> dma_bytes
- PAGE_SIZE
)
3103 return VM_FAULT_SIGBUS
;
3104 if (substream
->ops
->page
) {
3105 page
= substream
->ops
->page(substream
, offset
);
3107 return VM_FAULT_SIGBUS
;
3109 vaddr
= runtime
->dma_area
+ offset
;
3110 page
= virt_to_page(vaddr
);
3117 static struct vm_operations_struct snd_pcm_vm_ops_data
=
3119 .open
= snd_pcm_mmap_data_open
,
3120 .close
= snd_pcm_mmap_data_close
,
3121 .fault
= snd_pcm_mmap_data_fault
,
3125 * mmap the DMA buffer on RAM
3127 static int snd_pcm_default_mmap(struct snd_pcm_substream
*substream
,
3128 struct vm_area_struct
*area
)
3130 area
->vm_ops
= &snd_pcm_vm_ops_data
;
3131 area
->vm_private_data
= substream
;
3132 area
->vm_flags
|= VM_RESERVED
;
3133 atomic_inc(&substream
->mmap_count
);
3138 * mmap the DMA buffer on I/O memory area
3140 #if SNDRV_PCM_INFO_MMAP_IOMEM
3141 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio
=
3143 .open
= snd_pcm_mmap_data_open
,
3144 .close
= snd_pcm_mmap_data_close
,
3147 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream
*substream
,
3148 struct vm_area_struct
*area
)
3151 unsigned long offset
;
3153 #ifdef pgprot_noncached
3154 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3156 area
->vm_ops
= &snd_pcm_vm_ops_data_mmio
;
3157 area
->vm_private_data
= substream
;
3158 area
->vm_flags
|= VM_IO
;
3159 size
= area
->vm_end
- area
->vm_start
;
3160 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3161 if (io_remap_pfn_range(area
, area
->vm_start
,
3162 (substream
->runtime
->dma_addr
+ offset
) >> PAGE_SHIFT
,
3163 size
, area
->vm_page_prot
))
3165 atomic_inc(&substream
->mmap_count
);
3169 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem
);
3170 #endif /* SNDRV_PCM_INFO_MMAP */
3175 int snd_pcm_mmap_data(struct snd_pcm_substream
*substream
, struct file
*file
,
3176 struct vm_area_struct
*area
)
3178 struct snd_pcm_runtime
*runtime
;
3180 unsigned long offset
;
3183 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
3184 if (!(area
->vm_flags
& (VM_WRITE
|VM_READ
)))
3187 if (!(area
->vm_flags
& VM_READ
))
3190 runtime
= substream
->runtime
;
3191 snd_assert(runtime
!= NULL
, return -EAGAIN
);
3192 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3194 if (!(runtime
->info
& SNDRV_PCM_INFO_MMAP
))
3196 if (runtime
->access
== SNDRV_PCM_ACCESS_RW_INTERLEAVED
||
3197 runtime
->access
== SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
)
3199 size
= area
->vm_end
- area
->vm_start
;
3200 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3201 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3202 if ((size_t)size
> dma_bytes
)
3204 if (offset
> dma_bytes
- size
)
3207 if (substream
->ops
->mmap
)
3208 return substream
->ops
->mmap(substream
, area
);
3210 return snd_pcm_default_mmap(substream
, area
);
3213 EXPORT_SYMBOL(snd_pcm_mmap_data
);
3215 static int snd_pcm_mmap(struct file
*file
, struct vm_area_struct
*area
)
3217 struct snd_pcm_file
* pcm_file
;
3218 struct snd_pcm_substream
*substream
;
3219 unsigned long offset
;
3221 pcm_file
= file
->private_data
;
3222 substream
= pcm_file
->substream
;
3223 snd_assert(substream
!= NULL
, return -ENXIO
);
3225 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3227 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3228 if (pcm_file
->no_compat_mmap
)
3230 return snd_pcm_mmap_status(substream
, file
, area
);
3231 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3232 if (pcm_file
->no_compat_mmap
)
3234 return snd_pcm_mmap_control(substream
, file
, area
);
3236 return snd_pcm_mmap_data(substream
, file
, area
);
3241 static int snd_pcm_fasync(int fd
, struct file
* file
, int on
)
3243 struct snd_pcm_file
* pcm_file
;
3244 struct snd_pcm_substream
*substream
;
3245 struct snd_pcm_runtime
*runtime
;
3249 pcm_file
= file
->private_data
;
3250 substream
= pcm_file
->substream
;
3251 snd_assert(substream
!= NULL
, goto out
);
3252 runtime
= substream
->runtime
;
3254 err
= fasync_helper(fd
, file
, on
, &runtime
->fasync
);
3265 #ifdef CONFIG_COMPAT
3266 #include "pcm_compat.c"
3268 #define snd_pcm_ioctl_compat NULL
3272 * To be removed helpers to keep binary compatibility
3275 #ifdef CONFIG_SND_SUPPORT_OLD_API
3276 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3277 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3279 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params
*params
,
3280 struct snd_pcm_hw_params_old
*oparams
)
3284 memset(params
, 0, sizeof(*params
));
3285 params
->flags
= oparams
->flags
;
3286 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3287 params
->masks
[i
].bits
[0] = oparams
->masks
[i
];
3288 memcpy(params
->intervals
, oparams
->intervals
, sizeof(oparams
->intervals
));
3289 params
->rmask
= __OLD_TO_NEW_MASK(oparams
->rmask
);
3290 params
->cmask
= __OLD_TO_NEW_MASK(oparams
->cmask
);
3291 params
->info
= oparams
->info
;
3292 params
->msbits
= oparams
->msbits
;
3293 params
->rate_num
= oparams
->rate_num
;
3294 params
->rate_den
= oparams
->rate_den
;
3295 params
->fifo_size
= oparams
->fifo_size
;
3298 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old
*oparams
,
3299 struct snd_pcm_hw_params
*params
)
3303 memset(oparams
, 0, sizeof(*oparams
));
3304 oparams
->flags
= params
->flags
;
3305 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3306 oparams
->masks
[i
] = params
->masks
[i
].bits
[0];
3307 memcpy(oparams
->intervals
, params
->intervals
, sizeof(oparams
->intervals
));
3308 oparams
->rmask
= __NEW_TO_OLD_MASK(params
->rmask
);
3309 oparams
->cmask
= __NEW_TO_OLD_MASK(params
->cmask
);
3310 oparams
->info
= params
->info
;
3311 oparams
->msbits
= params
->msbits
;
3312 oparams
->rate_num
= params
->rate_num
;
3313 oparams
->rate_den
= params
->rate_den
;
3314 oparams
->fifo_size
= params
->fifo_size
;
3317 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
3318 struct snd_pcm_hw_params_old __user
* _oparams
)
3320 struct snd_pcm_hw_params
*params
;
3321 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3324 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3329 oparams
= kmalloc(sizeof(*oparams
), GFP_KERNEL
);
3335 if (copy_from_user(oparams
, _oparams
, sizeof(*oparams
))) {
3339 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3340 err
= snd_pcm_hw_refine(substream
, params
);
3341 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3342 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3352 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
3353 struct snd_pcm_hw_params_old __user
* _oparams
)
3355 struct snd_pcm_hw_params
*params
;
3356 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3359 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3364 oparams
= kmalloc(sizeof(*oparams
), GFP_KERNEL
);
3369 if (copy_from_user(oparams
, _oparams
, sizeof(*oparams
))) {
3373 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3374 err
= snd_pcm_hw_params(substream
, params
);
3375 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3376 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3385 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3391 const struct file_operations snd_pcm_f_ops
[2] = {
3393 .owner
= THIS_MODULE
,
3394 .write
= snd_pcm_write
,
3395 .aio_write
= snd_pcm_aio_write
,
3396 .open
= snd_pcm_playback_open
,
3397 .release
= snd_pcm_release
,
3398 .poll
= snd_pcm_playback_poll
,
3399 .unlocked_ioctl
= snd_pcm_playback_ioctl
,
3400 .compat_ioctl
= snd_pcm_ioctl_compat
,
3401 .mmap
= snd_pcm_mmap
,
3402 .fasync
= snd_pcm_fasync
,
3405 .owner
= THIS_MODULE
,
3406 .read
= snd_pcm_read
,
3407 .aio_read
= snd_pcm_aio_read
,
3408 .open
= snd_pcm_capture_open
,
3409 .release
= snd_pcm_release
,
3410 .poll
= snd_pcm_capture_poll
,
3411 .unlocked_ioctl
= snd_pcm_capture_ioctl
,
3412 .compat_ioctl
= snd_pcm_ioctl_compat
,
3413 .mmap
= snd_pcm_mmap
,
3414 .fasync
= snd_pcm_fasync
,