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
22 #include <sound/driver.h>
24 #include <linux/file.h>
25 #include <linux/slab.h>
26 #include <linux/time.h>
27 #include <linux/latency.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
->tick_time
= params_tick_time(params
);
417 runtime
->info
= params
->info
;
418 runtime
->rate_num
= params
->rate_num
;
419 runtime
->rate_den
= params
->rate_den
;
421 bits
= snd_pcm_format_physical_width(runtime
->format
);
422 runtime
->sample_bits
= bits
;
423 bits
*= runtime
->channels
;
424 runtime
->frame_bits
= bits
;
426 while (bits
% 8 != 0) {
430 runtime
->byte_align
= bits
/ 8;
431 runtime
->min_align
= frames
;
433 /* Default sw params */
434 runtime
->tstamp_mode
= SNDRV_PCM_TSTAMP_NONE
;
435 runtime
->period_step
= 1;
436 runtime
->sleep_min
= 0;
437 runtime
->control
->avail_min
= runtime
->period_size
;
438 runtime
->xfer_align
= runtime
->period_size
;
439 runtime
->start_threshold
= 1;
440 runtime
->stop_threshold
= runtime
->buffer_size
;
441 runtime
->silence_threshold
= 0;
442 runtime
->silence_size
= 0;
443 runtime
->boundary
= runtime
->buffer_size
;
444 while (runtime
->boundary
* 2 <= LONG_MAX
- runtime
->buffer_size
)
445 runtime
->boundary
*= 2;
447 snd_pcm_timer_resolution_change(substream
);
448 runtime
->status
->state
= SNDRV_PCM_STATE_SETUP
;
450 remove_acceptable_latency(substream
->latency_id
);
451 if ((usecs
= period_to_usecs(runtime
)) >= 0)
452 set_acceptable_latency(substream
->latency_id
, usecs
);
455 /* hardware might be unuseable from this time,
456 so we force application to retry to set
457 the correct hardware parameter settings */
458 runtime
->status
->state
= SNDRV_PCM_STATE_OPEN
;
459 if (substream
->ops
->hw_free
!= NULL
)
460 substream
->ops
->hw_free(substream
);
464 static int snd_pcm_hw_params_user(struct snd_pcm_substream
*substream
,
465 struct snd_pcm_hw_params __user
* _params
)
467 struct snd_pcm_hw_params
*params
;
470 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
475 if (copy_from_user(params
, _params
, sizeof(*params
))) {
479 err
= snd_pcm_hw_params(substream
, params
);
480 if (copy_to_user(_params
, params
, sizeof(*params
))) {
489 static int snd_pcm_hw_free(struct snd_pcm_substream
*substream
)
491 struct snd_pcm_runtime
*runtime
;
494 snd_assert(substream
!= NULL
, return -ENXIO
);
495 runtime
= substream
->runtime
;
496 snd_assert(runtime
!= NULL
, return -ENXIO
);
497 snd_pcm_stream_lock_irq(substream
);
498 switch (runtime
->status
->state
) {
499 case SNDRV_PCM_STATE_SETUP
:
500 case SNDRV_PCM_STATE_PREPARED
:
503 snd_pcm_stream_unlock_irq(substream
);
506 snd_pcm_stream_unlock_irq(substream
);
507 if (atomic_read(&substream
->mmap_count
))
509 if (substream
->ops
->hw_free
)
510 result
= substream
->ops
->hw_free(substream
);
511 runtime
->status
->state
= SNDRV_PCM_STATE_OPEN
;
512 remove_acceptable_latency(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
->xfer_align
== 0 ||
536 params
->xfer_align
% runtime
->min_align
!= 0)
538 if (params
->silence_size
>= runtime
->boundary
) {
539 if (params
->silence_threshold
!= 0)
542 if (params
->silence_size
> params
->silence_threshold
)
544 if (params
->silence_threshold
> runtime
->buffer_size
)
547 snd_pcm_stream_lock_irq(substream
);
548 runtime
->tstamp_mode
= params
->tstamp_mode
;
549 runtime
->sleep_min
= params
->sleep_min
;
550 runtime
->period_step
= params
->period_step
;
551 runtime
->control
->avail_min
= params
->avail_min
;
552 runtime
->start_threshold
= params
->start_threshold
;
553 runtime
->stop_threshold
= params
->stop_threshold
;
554 runtime
->silence_threshold
= params
->silence_threshold
;
555 runtime
->silence_size
= params
->silence_size
;
556 runtime
->xfer_align
= params
->xfer_align
;
557 params
->boundary
= runtime
->boundary
;
558 if (snd_pcm_running(substream
)) {
559 if (runtime
->sleep_min
)
560 snd_pcm_tick_prepare(substream
);
562 snd_pcm_tick_set(substream
, 0);
563 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
564 runtime
->silence_size
> 0)
565 snd_pcm_playback_silence(substream
, ULONG_MAX
);
566 wake_up(&runtime
->sleep
);
568 snd_pcm_stream_unlock_irq(substream
);
572 static int snd_pcm_sw_params_user(struct snd_pcm_substream
*substream
,
573 struct snd_pcm_sw_params __user
* _params
)
575 struct snd_pcm_sw_params params
;
577 if (copy_from_user(¶ms
, _params
, sizeof(params
)))
579 err
= snd_pcm_sw_params(substream
, ¶ms
);
580 if (copy_to_user(_params
, ¶ms
, sizeof(params
)))
585 int snd_pcm_status(struct snd_pcm_substream
*substream
,
586 struct snd_pcm_status
*status
)
588 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
590 snd_pcm_stream_lock_irq(substream
);
591 status
->state
= runtime
->status
->state
;
592 status
->suspended_state
= runtime
->status
->suspended_state
;
593 if (status
->state
== SNDRV_PCM_STATE_OPEN
)
595 status
->trigger_tstamp
= runtime
->trigger_tstamp
;
596 if (snd_pcm_running(substream
)) {
597 snd_pcm_update_hw_ptr(substream
);
598 if (runtime
->tstamp_mode
== SNDRV_PCM_TSTAMP_MMAP
)
599 status
->tstamp
= runtime
->status
->tstamp
;
601 snd_pcm_gettime(runtime
, &status
->tstamp
);
603 snd_pcm_gettime(runtime
, &status
->tstamp
);
604 status
->appl_ptr
= runtime
->control
->appl_ptr
;
605 status
->hw_ptr
= runtime
->status
->hw_ptr
;
606 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
607 status
->avail
= snd_pcm_playback_avail(runtime
);
608 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
||
609 runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
)
610 status
->delay
= runtime
->buffer_size
- status
->avail
;
614 status
->avail
= snd_pcm_capture_avail(runtime
);
615 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
)
616 status
->delay
= status
->avail
;
620 status
->avail_max
= runtime
->avail_max
;
621 status
->overrange
= runtime
->overrange
;
622 runtime
->avail_max
= 0;
623 runtime
->overrange
= 0;
625 snd_pcm_stream_unlock_irq(substream
);
629 static int snd_pcm_status_user(struct snd_pcm_substream
*substream
,
630 struct snd_pcm_status __user
* _status
)
632 struct snd_pcm_status status
;
633 struct snd_pcm_runtime
*runtime
;
636 snd_assert(substream
!= NULL
, return -ENXIO
);
637 runtime
= substream
->runtime
;
638 memset(&status
, 0, sizeof(status
));
639 res
= snd_pcm_status(substream
, &status
);
642 if (copy_to_user(_status
, &status
, sizeof(status
)))
647 static int snd_pcm_channel_info(struct snd_pcm_substream
*substream
,
648 struct snd_pcm_channel_info
* info
)
650 struct snd_pcm_runtime
*runtime
;
651 unsigned int channel
;
653 snd_assert(substream
!= NULL
, return -ENXIO
);
654 channel
= info
->channel
;
655 runtime
= substream
->runtime
;
656 snd_pcm_stream_lock_irq(substream
);
657 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
658 snd_pcm_stream_unlock_irq(substream
);
661 snd_pcm_stream_unlock_irq(substream
);
662 if (channel
>= runtime
->channels
)
664 memset(info
, 0, sizeof(*info
));
665 info
->channel
= channel
;
666 return substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_CHANNEL_INFO
, info
);
669 static int snd_pcm_channel_info_user(struct snd_pcm_substream
*substream
,
670 struct snd_pcm_channel_info __user
* _info
)
672 struct snd_pcm_channel_info info
;
675 if (copy_from_user(&info
, _info
, sizeof(info
)))
677 res
= snd_pcm_channel_info(substream
, &info
);
680 if (copy_to_user(_info
, &info
, sizeof(info
)))
685 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream
*substream
)
687 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
688 if (runtime
->trigger_master
== NULL
)
690 if (runtime
->trigger_master
== substream
) {
691 snd_pcm_gettime(runtime
, &runtime
->trigger_tstamp
);
693 snd_pcm_trigger_tstamp(runtime
->trigger_master
);
694 runtime
->trigger_tstamp
= runtime
->trigger_master
->runtime
->trigger_tstamp
;
696 runtime
->trigger_master
= NULL
;
700 int (*pre_action
)(struct snd_pcm_substream
*substream
, int state
);
701 int (*do_action
)(struct snd_pcm_substream
*substream
, int state
);
702 void (*undo_action
)(struct snd_pcm_substream
*substream
, int state
);
703 void (*post_action
)(struct snd_pcm_substream
*substream
, int state
);
707 * this functions is core for handling of linked stream
708 * Note: the stream state might be changed also on failure
709 * Note2: call with calling stream lock + link lock
711 static int snd_pcm_action_group(struct action_ops
*ops
,
712 struct snd_pcm_substream
*substream
,
713 int state
, int do_lock
)
715 struct snd_pcm_substream
*s
= NULL
;
716 struct snd_pcm_substream
*s1
;
719 snd_pcm_group_for_each_entry(s
, substream
) {
720 if (do_lock
&& s
!= substream
)
721 spin_lock_nested(&s
->self_group
.lock
,
722 SINGLE_DEPTH_NESTING
);
723 res
= ops
->pre_action(s
, state
);
727 snd_pcm_group_for_each_entry(s
, substream
) {
728 res
= ops
->do_action(s
, state
);
730 if (ops
->undo_action
) {
731 snd_pcm_group_for_each_entry(s1
, substream
) {
732 if (s1
== s
) /* failed stream */
734 ops
->undo_action(s1
, state
);
737 s
= NULL
; /* unlock all */
741 snd_pcm_group_for_each_entry(s
, substream
) {
742 ops
->post_action(s
, state
);
747 snd_pcm_group_for_each_entry(s1
, substream
) {
749 spin_unlock(&s1
->self_group
.lock
);
750 if (s1
== s
) /* end */
758 * Note: call with stream lock
760 static int snd_pcm_action_single(struct action_ops
*ops
,
761 struct snd_pcm_substream
*substream
,
766 res
= ops
->pre_action(substream
, state
);
769 res
= ops
->do_action(substream
, state
);
771 ops
->post_action(substream
, state
);
772 else if (ops
->undo_action
)
773 ops
->undo_action(substream
, state
);
778 * Note: call with stream lock
780 static int snd_pcm_action(struct action_ops
*ops
,
781 struct snd_pcm_substream
*substream
,
786 if (snd_pcm_stream_linked(substream
)) {
787 if (!spin_trylock(&substream
->group
->lock
)) {
788 spin_unlock(&substream
->self_group
.lock
);
789 spin_lock(&substream
->group
->lock
);
790 spin_lock(&substream
->self_group
.lock
);
792 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
793 spin_unlock(&substream
->group
->lock
);
795 res
= snd_pcm_action_single(ops
, substream
, state
);
801 * Note: don't use any locks before
803 static int snd_pcm_action_lock_irq(struct action_ops
*ops
,
804 struct snd_pcm_substream
*substream
,
809 read_lock_irq(&snd_pcm_link_rwlock
);
810 if (snd_pcm_stream_linked(substream
)) {
811 spin_lock(&substream
->group
->lock
);
812 spin_lock(&substream
->self_group
.lock
);
813 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
814 spin_unlock(&substream
->self_group
.lock
);
815 spin_unlock(&substream
->group
->lock
);
817 spin_lock(&substream
->self_group
.lock
);
818 res
= snd_pcm_action_single(ops
, substream
, state
);
819 spin_unlock(&substream
->self_group
.lock
);
821 read_unlock_irq(&snd_pcm_link_rwlock
);
827 static int snd_pcm_action_nonatomic(struct action_ops
*ops
,
828 struct snd_pcm_substream
*substream
,
833 down_read(&snd_pcm_link_rwsem
);
834 if (snd_pcm_stream_linked(substream
))
835 res
= snd_pcm_action_group(ops
, substream
, state
, 0);
837 res
= snd_pcm_action_single(ops
, substream
, state
);
838 up_read(&snd_pcm_link_rwsem
);
845 static int snd_pcm_pre_start(struct snd_pcm_substream
*substream
, int state
)
847 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
848 if (runtime
->status
->state
!= SNDRV_PCM_STATE_PREPARED
)
850 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
851 !snd_pcm_playback_data(substream
))
853 runtime
->trigger_master
= substream
;
857 static int snd_pcm_do_start(struct snd_pcm_substream
*substream
, int state
)
859 if (substream
->runtime
->trigger_master
!= substream
)
861 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_START
);
864 static void snd_pcm_undo_start(struct snd_pcm_substream
*substream
, int state
)
866 if (substream
->runtime
->trigger_master
== substream
)
867 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
870 static void snd_pcm_post_start(struct snd_pcm_substream
*substream
, int state
)
872 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
873 snd_pcm_trigger_tstamp(substream
);
874 runtime
->status
->state
= state
;
875 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
876 runtime
->silence_size
> 0)
877 snd_pcm_playback_silence(substream
, ULONG_MAX
);
878 if (runtime
->sleep_min
)
879 snd_pcm_tick_prepare(substream
);
880 if (substream
->timer
)
881 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTART
,
882 &runtime
->trigger_tstamp
);
885 static struct action_ops snd_pcm_action_start
= {
886 .pre_action
= snd_pcm_pre_start
,
887 .do_action
= snd_pcm_do_start
,
888 .undo_action
= snd_pcm_undo_start
,
889 .post_action
= snd_pcm_post_start
894 * @substream: the PCM substream instance
896 * Start all linked streams.
898 int snd_pcm_start(struct snd_pcm_substream
*substream
)
900 return snd_pcm_action(&snd_pcm_action_start
, substream
,
901 SNDRV_PCM_STATE_RUNNING
);
907 static int snd_pcm_pre_stop(struct snd_pcm_substream
*substream
, int state
)
909 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
910 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
912 runtime
->trigger_master
= substream
;
916 static int snd_pcm_do_stop(struct snd_pcm_substream
*substream
, int state
)
918 if (substream
->runtime
->trigger_master
== substream
&&
919 snd_pcm_running(substream
))
920 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
921 return 0; /* unconditonally stop all substreams */
924 static void snd_pcm_post_stop(struct snd_pcm_substream
*substream
, int state
)
926 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
927 if (runtime
->status
->state
!= state
) {
928 snd_pcm_trigger_tstamp(substream
);
929 if (substream
->timer
)
930 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTOP
,
931 &runtime
->trigger_tstamp
);
932 runtime
->status
->state
= state
;
933 snd_pcm_tick_set(substream
, 0);
935 wake_up(&runtime
->sleep
);
938 static struct action_ops snd_pcm_action_stop
= {
939 .pre_action
= snd_pcm_pre_stop
,
940 .do_action
= snd_pcm_do_stop
,
941 .post_action
= snd_pcm_post_stop
946 * @substream: the PCM substream instance
947 * @state: PCM state after stopping the stream
949 * Try to stop all running streams in the substream group.
950 * The state of each stream is changed to the given value after that unconditionally.
952 int snd_pcm_stop(struct snd_pcm_substream
*substream
, int state
)
954 return snd_pcm_action(&snd_pcm_action_stop
, substream
, state
);
957 EXPORT_SYMBOL(snd_pcm_stop
);
961 * @substream: the PCM substream
963 * Stop the DMA only when the given stream is playback.
964 * The state is changed to SETUP.
965 * Unlike snd_pcm_stop(), this affects only the given stream.
967 int snd_pcm_drain_done(struct snd_pcm_substream
*substream
)
969 return snd_pcm_action_single(&snd_pcm_action_stop
, substream
,
970 SNDRV_PCM_STATE_SETUP
);
976 static int snd_pcm_pre_pause(struct snd_pcm_substream
*substream
, int push
)
978 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
979 if (!(runtime
->info
& SNDRV_PCM_INFO_PAUSE
))
982 if (runtime
->status
->state
!= SNDRV_PCM_STATE_RUNNING
)
984 } else if (runtime
->status
->state
!= SNDRV_PCM_STATE_PAUSED
)
986 runtime
->trigger_master
= substream
;
990 static int snd_pcm_do_pause(struct snd_pcm_substream
*substream
, int push
)
992 if (substream
->runtime
->trigger_master
!= substream
)
994 return substream
->ops
->trigger(substream
,
995 push
? SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
996 SNDRV_PCM_TRIGGER_PAUSE_RELEASE
);
999 static void snd_pcm_undo_pause(struct snd_pcm_substream
*substream
, int push
)
1001 if (substream
->runtime
->trigger_master
== substream
)
1002 substream
->ops
->trigger(substream
,
1003 push
? SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1004 SNDRV_PCM_TRIGGER_PAUSE_PUSH
);
1007 static void snd_pcm_post_pause(struct snd_pcm_substream
*substream
, int push
)
1009 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1010 snd_pcm_trigger_tstamp(substream
);
1012 runtime
->status
->state
= SNDRV_PCM_STATE_PAUSED
;
1013 if (substream
->timer
)
1014 snd_timer_notify(substream
->timer
,
1015 SNDRV_TIMER_EVENT_MPAUSE
,
1016 &runtime
->trigger_tstamp
);
1017 snd_pcm_tick_set(substream
, 0);
1018 wake_up(&runtime
->sleep
);
1020 runtime
->status
->state
= SNDRV_PCM_STATE_RUNNING
;
1021 if (runtime
->sleep_min
)
1022 snd_pcm_tick_prepare(substream
);
1023 if (substream
->timer
)
1024 snd_timer_notify(substream
->timer
,
1025 SNDRV_TIMER_EVENT_MCONTINUE
,
1026 &runtime
->trigger_tstamp
);
1030 static struct action_ops snd_pcm_action_pause
= {
1031 .pre_action
= snd_pcm_pre_pause
,
1032 .do_action
= snd_pcm_do_pause
,
1033 .undo_action
= snd_pcm_undo_pause
,
1034 .post_action
= snd_pcm_post_pause
1038 * Push/release the pause for all linked streams.
1040 static int snd_pcm_pause(struct snd_pcm_substream
*substream
, int push
)
1042 return snd_pcm_action(&snd_pcm_action_pause
, substream
, push
);
1048 static int snd_pcm_pre_suspend(struct snd_pcm_substream
*substream
, int state
)
1050 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1051 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1053 runtime
->trigger_master
= substream
;
1057 static int snd_pcm_do_suspend(struct snd_pcm_substream
*substream
, int state
)
1059 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1060 if (runtime
->trigger_master
!= substream
)
1062 if (! snd_pcm_running(substream
))
1064 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1065 return 0; /* suspend unconditionally */
1068 static void snd_pcm_post_suspend(struct snd_pcm_substream
*substream
, int state
)
1070 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1071 snd_pcm_trigger_tstamp(substream
);
1072 if (substream
->timer
)
1073 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSUSPEND
,
1074 &runtime
->trigger_tstamp
);
1075 runtime
->status
->suspended_state
= runtime
->status
->state
;
1076 runtime
->status
->state
= SNDRV_PCM_STATE_SUSPENDED
;
1077 snd_pcm_tick_set(substream
, 0);
1078 wake_up(&runtime
->sleep
);
1081 static struct action_ops snd_pcm_action_suspend
= {
1082 .pre_action
= snd_pcm_pre_suspend
,
1083 .do_action
= snd_pcm_do_suspend
,
1084 .post_action
= snd_pcm_post_suspend
1089 * @substream: the PCM substream
1091 * Trigger SUSPEND to all linked streams.
1092 * After this call, all streams are changed to SUSPENDED state.
1094 int snd_pcm_suspend(struct snd_pcm_substream
*substream
)
1097 unsigned long flags
;
1102 snd_pcm_stream_lock_irqsave(substream
, flags
);
1103 err
= snd_pcm_action(&snd_pcm_action_suspend
, substream
, 0);
1104 snd_pcm_stream_unlock_irqrestore(substream
, flags
);
1108 EXPORT_SYMBOL(snd_pcm_suspend
);
1111 * snd_pcm_suspend_all
1112 * @pcm: the PCM instance
1114 * Trigger SUSPEND to all substreams in the given pcm.
1115 * After this call, all streams are changed to SUSPENDED state.
1117 int snd_pcm_suspend_all(struct snd_pcm
*pcm
)
1119 struct snd_pcm_substream
*substream
;
1120 int stream
, err
= 0;
1125 for (stream
= 0; stream
< 2; stream
++) {
1126 for (substream
= pcm
->streams
[stream
].substream
;
1127 substream
; substream
= substream
->next
) {
1128 /* FIXME: the open/close code should lock this as well */
1129 if (substream
->runtime
== NULL
)
1131 err
= snd_pcm_suspend(substream
);
1132 if (err
< 0 && err
!= -EBUSY
)
1139 EXPORT_SYMBOL(snd_pcm_suspend_all
);
1143 static int snd_pcm_pre_resume(struct snd_pcm_substream
*substream
, int state
)
1145 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1146 if (!(runtime
->info
& SNDRV_PCM_INFO_RESUME
))
1148 runtime
->trigger_master
= substream
;
1152 static int snd_pcm_do_resume(struct snd_pcm_substream
*substream
, int state
)
1154 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1155 if (runtime
->trigger_master
!= substream
)
1157 /* DMA not running previously? */
1158 if (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_RUNNING
&&
1159 (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_DRAINING
||
1160 substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
1162 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_RESUME
);
1165 static void snd_pcm_undo_resume(struct snd_pcm_substream
*substream
, int state
)
1167 if (substream
->runtime
->trigger_master
== substream
&&
1168 snd_pcm_running(substream
))
1169 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1172 static void snd_pcm_post_resume(struct snd_pcm_substream
*substream
, int state
)
1174 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1175 snd_pcm_trigger_tstamp(substream
);
1176 if (substream
->timer
)
1177 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MRESUME
,
1178 &runtime
->trigger_tstamp
);
1179 runtime
->status
->state
= runtime
->status
->suspended_state
;
1180 if (runtime
->sleep_min
)
1181 snd_pcm_tick_prepare(substream
);
1184 static struct action_ops snd_pcm_action_resume
= {
1185 .pre_action
= snd_pcm_pre_resume
,
1186 .do_action
= snd_pcm_do_resume
,
1187 .undo_action
= snd_pcm_undo_resume
,
1188 .post_action
= snd_pcm_post_resume
1191 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1193 struct snd_card
*card
= substream
->pcm
->card
;
1196 snd_power_lock(card
);
1197 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1198 res
= snd_pcm_action_lock_irq(&snd_pcm_action_resume
, substream
, 0);
1199 snd_power_unlock(card
);
1205 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1210 #endif /* CONFIG_PM */
1215 * Change the RUNNING stream(s) to XRUN state.
1217 static int snd_pcm_xrun(struct snd_pcm_substream
*substream
)
1219 struct snd_card
*card
= substream
->pcm
->card
;
1220 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1223 snd_power_lock(card
);
1224 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1225 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1230 snd_pcm_stream_lock_irq(substream
);
1231 switch (runtime
->status
->state
) {
1232 case SNDRV_PCM_STATE_XRUN
:
1233 result
= 0; /* already there */
1235 case SNDRV_PCM_STATE_RUNNING
:
1236 result
= snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
1241 snd_pcm_stream_unlock_irq(substream
);
1243 snd_power_unlock(card
);
1250 static int snd_pcm_pre_reset(struct snd_pcm_substream
*substream
, int state
)
1252 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1253 switch (runtime
->status
->state
) {
1254 case SNDRV_PCM_STATE_RUNNING
:
1255 case SNDRV_PCM_STATE_PREPARED
:
1256 case SNDRV_PCM_STATE_PAUSED
:
1257 case SNDRV_PCM_STATE_SUSPENDED
:
1264 static int snd_pcm_do_reset(struct snd_pcm_substream
*substream
, int state
)
1266 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1267 int err
= substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_RESET
, NULL
);
1270 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1271 runtime
->hw_ptr_base
= 0;
1272 runtime
->hw_ptr_interrupt
= runtime
->status
->hw_ptr
-
1273 runtime
->status
->hw_ptr
% runtime
->period_size
;
1274 runtime
->silence_start
= runtime
->status
->hw_ptr
;
1275 runtime
->silence_filled
= 0;
1279 static void snd_pcm_post_reset(struct snd_pcm_substream
*substream
, int state
)
1281 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1282 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1283 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
1284 runtime
->silence_size
> 0)
1285 snd_pcm_playback_silence(substream
, ULONG_MAX
);
1288 static struct action_ops snd_pcm_action_reset
= {
1289 .pre_action
= snd_pcm_pre_reset
,
1290 .do_action
= snd_pcm_do_reset
,
1291 .post_action
= snd_pcm_post_reset
1294 static int snd_pcm_reset(struct snd_pcm_substream
*substream
)
1296 return snd_pcm_action_nonatomic(&snd_pcm_action_reset
, substream
, 0);
1302 /* we use the second argument for updating f_flags */
1303 static int snd_pcm_pre_prepare(struct snd_pcm_substream
*substream
,
1306 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1307 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1308 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
)
1310 if (snd_pcm_running(substream
))
1312 substream
->f_flags
= f_flags
;
1316 static int snd_pcm_do_prepare(struct snd_pcm_substream
*substream
, int state
)
1319 err
= substream
->ops
->prepare(substream
);
1322 return snd_pcm_do_reset(substream
, 0);
1325 static void snd_pcm_post_prepare(struct snd_pcm_substream
*substream
, int state
)
1327 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1328 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1329 runtime
->status
->state
= SNDRV_PCM_STATE_PREPARED
;
1332 static struct action_ops snd_pcm_action_prepare
= {
1333 .pre_action
= snd_pcm_pre_prepare
,
1334 .do_action
= snd_pcm_do_prepare
,
1335 .post_action
= snd_pcm_post_prepare
1340 * @substream: the PCM substream instance
1341 * @file: file to refer f_flags
1343 * Prepare the PCM substream to be triggerable.
1345 static int snd_pcm_prepare(struct snd_pcm_substream
*substream
,
1349 struct snd_card
*card
= substream
->pcm
->card
;
1353 f_flags
= file
->f_flags
;
1355 f_flags
= substream
->f_flags
;
1357 snd_power_lock(card
);
1358 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1359 res
= snd_pcm_action_nonatomic(&snd_pcm_action_prepare
,
1360 substream
, f_flags
);
1361 snd_power_unlock(card
);
1369 static int snd_pcm_pre_drain_init(struct snd_pcm_substream
*substream
, int state
)
1371 if (substream
->f_flags
& O_NONBLOCK
)
1373 substream
->runtime
->trigger_master
= substream
;
1377 static int snd_pcm_do_drain_init(struct snd_pcm_substream
*substream
, int state
)
1379 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1380 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
1381 switch (runtime
->status
->state
) {
1382 case SNDRV_PCM_STATE_PREPARED
:
1383 /* start playback stream if possible */
1384 if (! snd_pcm_playback_empty(substream
)) {
1385 snd_pcm_do_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1386 snd_pcm_post_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1389 case SNDRV_PCM_STATE_RUNNING
:
1390 runtime
->status
->state
= SNDRV_PCM_STATE_DRAINING
;
1396 /* stop running stream */
1397 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
) {
1398 int new_state
= snd_pcm_capture_avail(runtime
) > 0 ?
1399 SNDRV_PCM_STATE_DRAINING
: SNDRV_PCM_STATE_SETUP
;
1400 snd_pcm_do_stop(substream
, new_state
);
1401 snd_pcm_post_stop(substream
, new_state
);
1407 static void snd_pcm_post_drain_init(struct snd_pcm_substream
*substream
, int state
)
1411 static struct action_ops snd_pcm_action_drain_init
= {
1412 .pre_action
= snd_pcm_pre_drain_init
,
1413 .do_action
= snd_pcm_do_drain_init
,
1414 .post_action
= snd_pcm_post_drain_init
1418 struct snd_pcm_substream
*substream
;
1420 snd_pcm_uframes_t stop_threshold
;
1423 static int snd_pcm_drop(struct snd_pcm_substream
*substream
);
1426 * Drain the stream(s).
1427 * When the substream is linked, sync until the draining of all playback streams
1429 * After this call, all streams are supposed to be either SETUP or DRAINING
1430 * (capture only) state.
1432 static int snd_pcm_drain(struct snd_pcm_substream
*substream
)
1434 struct snd_card
*card
;
1435 struct snd_pcm_runtime
*runtime
;
1436 struct snd_pcm_substream
*s
;
1439 struct drain_rec
*drec
, drec_tmp
, *d
;
1441 snd_assert(substream
!= NULL
, return -ENXIO
);
1442 card
= substream
->pcm
->card
;
1443 runtime
= substream
->runtime
;
1445 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1448 snd_power_lock(card
);
1449 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1450 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1452 snd_power_unlock(card
);
1457 /* allocate temporary record for drain sync */
1458 down_read(&snd_pcm_link_rwsem
);
1459 if (snd_pcm_stream_linked(substream
)) {
1460 drec
= kmalloc(substream
->group
->count
* sizeof(*drec
), GFP_KERNEL
);
1462 up_read(&snd_pcm_link_rwsem
);
1463 snd_power_unlock(card
);
1469 /* count only playback streams */
1471 snd_pcm_group_for_each_entry(s
, substream
) {
1472 runtime
= s
->runtime
;
1473 if (s
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
1474 d
= &drec
[num_drecs
++];
1476 init_waitqueue_entry(&d
->wait
, current
);
1477 add_wait_queue(&runtime
->sleep
, &d
->wait
);
1478 /* stop_threshold fixup to avoid endless loop when
1479 * stop_threshold > buffer_size
1481 d
->stop_threshold
= runtime
->stop_threshold
;
1482 if (runtime
->stop_threshold
> runtime
->buffer_size
)
1483 runtime
->stop_threshold
= runtime
->buffer_size
;
1486 up_read(&snd_pcm_link_rwsem
);
1488 snd_pcm_stream_lock_irq(substream
);
1490 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1491 snd_pcm_pause(substream
, 0);
1493 /* pre-start/stop - all running streams are changed to DRAINING state */
1494 result
= snd_pcm_action(&snd_pcm_action_drain_init
, substream
, 0);
1496 snd_pcm_stream_unlock_irq(substream
);
1502 if (signal_pending(current
)) {
1503 result
= -ERESTARTSYS
;
1507 for (i
= 0; i
< num_drecs
; i
++) {
1508 runtime
= drec
[i
].substream
->runtime
;
1509 if (runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
)
1513 break; /* yes, all drained */
1515 set_current_state(TASK_INTERRUPTIBLE
);
1516 snd_pcm_stream_unlock_irq(substream
);
1517 snd_power_unlock(card
);
1518 tout
= schedule_timeout(10 * HZ
);
1519 snd_power_lock(card
);
1520 snd_pcm_stream_lock_irq(substream
);
1522 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1525 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1526 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1533 snd_pcm_stream_unlock_irq(substream
);
1536 for (i
= 0; i
< num_drecs
; i
++) {
1538 runtime
= d
->substream
->runtime
;
1539 remove_wait_queue(&runtime
->sleep
, &d
->wait
);
1540 runtime
->stop_threshold
= d
->stop_threshold
;
1543 if (drec
!= &drec_tmp
)
1545 snd_power_unlock(card
);
1553 * Immediately put all linked substreams into SETUP state.
1555 static int snd_pcm_drop(struct snd_pcm_substream
*substream
)
1557 struct snd_pcm_runtime
*runtime
;
1558 struct snd_card
*card
;
1561 snd_assert(substream
!= NULL
, return -ENXIO
);
1562 runtime
= substream
->runtime
;
1563 card
= substream
->pcm
->card
;
1565 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1566 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
)
1569 snd_power_lock(card
);
1570 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1571 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1576 snd_pcm_stream_lock_irq(substream
);
1578 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1579 snd_pcm_pause(substream
, 0);
1581 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1582 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1583 snd_pcm_stream_unlock_irq(substream
);
1585 snd_power_unlock(card
);
1590 /* WARNING: Don't forget to fput back the file */
1591 static struct file
*snd_pcm_file_fd(int fd
)
1594 struct inode
*inode
;
1600 inode
= file
->f_path
.dentry
->d_inode
;
1601 if (!S_ISCHR(inode
->i_mode
) ||
1602 imajor(inode
) != snd_major
) {
1606 minor
= iminor(inode
);
1607 if (!snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_PLAYBACK
) &&
1608 !snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_CAPTURE
)) {
1618 static int snd_pcm_link(struct snd_pcm_substream
*substream
, int fd
)
1622 struct snd_pcm_file
*pcm_file
;
1623 struct snd_pcm_substream
*substream1
;
1625 file
= snd_pcm_file_fd(fd
);
1628 pcm_file
= file
->private_data
;
1629 substream1
= pcm_file
->substream
;
1630 down_write(&snd_pcm_link_rwsem
);
1631 write_lock_irq(&snd_pcm_link_rwlock
);
1632 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1633 substream
->runtime
->status
->state
!= substream1
->runtime
->status
->state
) {
1637 if (snd_pcm_stream_linked(substream1
)) {
1641 if (!snd_pcm_stream_linked(substream
)) {
1642 substream
->group
= kmalloc(sizeof(struct snd_pcm_group
), GFP_ATOMIC
);
1643 if (substream
->group
== NULL
) {
1647 spin_lock_init(&substream
->group
->lock
);
1648 INIT_LIST_HEAD(&substream
->group
->substreams
);
1649 list_add_tail(&substream
->link_list
, &substream
->group
->substreams
);
1650 substream
->group
->count
= 1;
1652 list_add_tail(&substream1
->link_list
, &substream
->group
->substreams
);
1653 substream
->group
->count
++;
1654 substream1
->group
= substream
->group
;
1656 write_unlock_irq(&snd_pcm_link_rwlock
);
1657 up_write(&snd_pcm_link_rwsem
);
1662 static void relink_to_local(struct snd_pcm_substream
*substream
)
1664 substream
->group
= &substream
->self_group
;
1665 INIT_LIST_HEAD(&substream
->self_group
.substreams
);
1666 list_add_tail(&substream
->link_list
, &substream
->self_group
.substreams
);
1669 static int snd_pcm_unlink(struct snd_pcm_substream
*substream
)
1671 struct snd_pcm_substream
*s
;
1674 down_write(&snd_pcm_link_rwsem
);
1675 write_lock_irq(&snd_pcm_link_rwlock
);
1676 if (!snd_pcm_stream_linked(substream
)) {
1680 list_del(&substream
->link_list
);
1681 substream
->group
->count
--;
1682 if (substream
->group
->count
== 1) { /* detach the last stream, too */
1683 snd_pcm_group_for_each_entry(s
, substream
) {
1687 kfree(substream
->group
);
1689 relink_to_local(substream
);
1691 write_unlock_irq(&snd_pcm_link_rwlock
);
1692 up_write(&snd_pcm_link_rwsem
);
1699 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params
*params
,
1700 struct snd_pcm_hw_rule
*rule
)
1702 struct snd_interval t
;
1703 snd_interval_mul(hw_param_interval_c(params
, rule
->deps
[0]),
1704 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1705 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1708 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params
*params
,
1709 struct snd_pcm_hw_rule
*rule
)
1711 struct snd_interval t
;
1712 snd_interval_div(hw_param_interval_c(params
, rule
->deps
[0]),
1713 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1714 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1717 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params
*params
,
1718 struct snd_pcm_hw_rule
*rule
)
1720 struct snd_interval t
;
1721 snd_interval_muldivk(hw_param_interval_c(params
, rule
->deps
[0]),
1722 hw_param_interval_c(params
, rule
->deps
[1]),
1723 (unsigned long) rule
->private, &t
);
1724 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1727 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params
*params
,
1728 struct snd_pcm_hw_rule
*rule
)
1730 struct snd_interval t
;
1731 snd_interval_mulkdiv(hw_param_interval_c(params
, rule
->deps
[0]),
1732 (unsigned long) rule
->private,
1733 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1734 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1737 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params
*params
,
1738 struct snd_pcm_hw_rule
*rule
)
1741 struct snd_interval
*i
= hw_param_interval(params
, rule
->deps
[0]);
1743 struct snd_mask
*mask
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1745 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1747 if (! snd_mask_test(mask
, k
))
1749 bits
= snd_pcm_format_physical_width(k
);
1751 continue; /* ignore invalid formats */
1752 if ((unsigned)bits
< i
->min
|| (unsigned)bits
> i
->max
)
1753 snd_mask_reset(&m
, k
);
1755 return snd_mask_refine(mask
, &m
);
1758 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params
*params
,
1759 struct snd_pcm_hw_rule
*rule
)
1761 struct snd_interval t
;
1767 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1769 if (! snd_mask_test(hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
), k
))
1771 bits
= snd_pcm_format_physical_width(k
);
1773 continue; /* ignore invalid formats */
1774 if (t
.min
> (unsigned)bits
)
1776 if (t
.max
< (unsigned)bits
)
1780 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1783 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1784 #error "Change this table"
1787 static unsigned int rates
[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1788 48000, 64000, 88200, 96000, 176400, 192000 };
1790 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates
= {
1791 .count
= ARRAY_SIZE(rates
),
1795 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params
*params
,
1796 struct snd_pcm_hw_rule
*rule
)
1798 struct snd_pcm_hardware
*hw
= rule
->private;
1799 return snd_interval_list(hw_param_interval(params
, rule
->var
),
1800 snd_pcm_known_rates
.count
,
1801 snd_pcm_known_rates
.list
, hw
->rates
);
1804 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params
*params
,
1805 struct snd_pcm_hw_rule
*rule
)
1807 struct snd_interval t
;
1808 struct snd_pcm_substream
*substream
= rule
->private;
1810 t
.max
= substream
->buffer_bytes_max
;
1814 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1817 int snd_pcm_hw_constraints_init(struct snd_pcm_substream
*substream
)
1819 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1820 struct snd_pcm_hw_constraints
*constrs
= &runtime
->hw_constraints
;
1823 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
1824 snd_mask_any(constrs_mask(constrs
, k
));
1827 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
1828 snd_interval_any(constrs_interval(constrs
, k
));
1831 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_CHANNELS
));
1832 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
));
1833 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
));
1834 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
));
1835 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_FRAME_BITS
));
1837 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1838 snd_pcm_hw_rule_format
, NULL
,
1839 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1842 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1843 snd_pcm_hw_rule_sample_bits
, NULL
,
1844 SNDRV_PCM_HW_PARAM_FORMAT
,
1845 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1848 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1849 snd_pcm_hw_rule_div
, NULL
,
1850 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1853 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1854 snd_pcm_hw_rule_mul
, NULL
,
1855 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1858 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1859 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1860 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1863 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1864 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1865 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, -1);
1868 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
1869 snd_pcm_hw_rule_div
, NULL
,
1870 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1873 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1874 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1875 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
, -1);
1878 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1879 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1880 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_BUFFER_TIME
, -1);
1883 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIODS
,
1884 snd_pcm_hw_rule_div
, NULL
,
1885 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1888 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1889 snd_pcm_hw_rule_div
, NULL
,
1890 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1893 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1894 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1895 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1898 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1899 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1900 SNDRV_PCM_HW_PARAM_PERIOD_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1903 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1904 snd_pcm_hw_rule_mul
, NULL
,
1905 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1908 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1909 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1910 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1913 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1914 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1915 SNDRV_PCM_HW_PARAM_BUFFER_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1918 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1919 snd_pcm_hw_rule_muldivk
, (void*) 8,
1920 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1923 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1924 snd_pcm_hw_rule_muldivk
, (void*) 8,
1925 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1928 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
1929 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1930 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1933 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME
,
1934 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1935 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1941 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream
*substream
)
1943 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1944 struct snd_pcm_hardware
*hw
= &runtime
->hw
;
1946 unsigned int mask
= 0;
1948 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1949 mask
|= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED
;
1950 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1951 mask
|= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
;
1952 if (hw
->info
& SNDRV_PCM_INFO_MMAP
) {
1953 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1954 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED
;
1955 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1956 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED
;
1957 if (hw
->info
& SNDRV_PCM_INFO_COMPLEX
)
1958 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX
;
1960 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_ACCESS
, mask
);
1961 snd_assert(err
>= 0, return -EINVAL
);
1963 err
= snd_pcm_hw_constraint_mask64(runtime
, SNDRV_PCM_HW_PARAM_FORMAT
, hw
->formats
);
1964 snd_assert(err
>= 0, return -EINVAL
);
1966 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_SUBFORMAT
, 1 << SNDRV_PCM_SUBFORMAT_STD
);
1967 snd_assert(err
>= 0, return -EINVAL
);
1969 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_CHANNELS
,
1970 hw
->channels_min
, hw
->channels_max
);
1971 snd_assert(err
>= 0, return -EINVAL
);
1973 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_RATE
,
1974 hw
->rate_min
, hw
->rate_max
);
1975 snd_assert(err
>= 0, return -EINVAL
);
1977 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1978 hw
->period_bytes_min
, hw
->period_bytes_max
);
1979 snd_assert(err
>= 0, return -EINVAL
);
1981 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIODS
,
1982 hw
->periods_min
, hw
->periods_max
);
1983 snd_assert(err
>= 0, return -EINVAL
);
1985 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1986 hw
->period_bytes_min
, hw
->buffer_bytes_max
);
1987 snd_assert(err
>= 0, return -EINVAL
);
1989 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1990 snd_pcm_hw_rule_buffer_bytes_max
, substream
,
1991 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, -1);
1996 if (runtime
->dma_bytes
) {
1997 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, 0, runtime
->dma_bytes
);
1998 snd_assert(err
>= 0, return -EINVAL
);
2001 if (!(hw
->rates
& (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))) {
2002 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
2003 snd_pcm_hw_rule_rate
, hw
,
2004 SNDRV_PCM_HW_PARAM_RATE
, -1);
2009 /* FIXME: this belong to lowlevel */
2010 snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_TICK_TIME
,
2011 1000000 / HZ
, 1000000 / HZ
);
2012 snd_pcm_hw_constraint_integer(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
);
2017 static void pcm_release_private(struct snd_pcm_substream
*substream
)
2019 snd_pcm_unlink(substream
);
2022 void snd_pcm_release_substream(struct snd_pcm_substream
*substream
)
2024 substream
->ref_count
--;
2025 if (substream
->ref_count
> 0)
2028 snd_pcm_drop(substream
);
2029 if (substream
->hw_opened
) {
2030 if (substream
->ops
->hw_free
!= NULL
)
2031 substream
->ops
->hw_free(substream
);
2032 substream
->ops
->close(substream
);
2033 substream
->hw_opened
= 0;
2035 if (substream
->pcm_release
) {
2036 substream
->pcm_release(substream
);
2037 substream
->pcm_release
= NULL
;
2039 snd_pcm_detach_substream(substream
);
2042 EXPORT_SYMBOL(snd_pcm_release_substream
);
2044 int snd_pcm_open_substream(struct snd_pcm
*pcm
, int stream
,
2046 struct snd_pcm_substream
**rsubstream
)
2048 struct snd_pcm_substream
*substream
;
2051 err
= snd_pcm_attach_substream(pcm
, stream
, file
, &substream
);
2054 if (substream
->ref_count
> 1) {
2055 *rsubstream
= substream
;
2059 err
= snd_pcm_hw_constraints_init(substream
);
2061 snd_printd("snd_pcm_hw_constraints_init failed\n");
2065 if ((err
= substream
->ops
->open(substream
)) < 0)
2068 substream
->hw_opened
= 1;
2070 err
= snd_pcm_hw_constraints_complete(substream
);
2072 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2076 *rsubstream
= substream
;
2080 snd_pcm_release_substream(substream
);
2084 EXPORT_SYMBOL(snd_pcm_open_substream
);
2086 static int snd_pcm_open_file(struct file
*file
,
2087 struct snd_pcm
*pcm
,
2089 struct snd_pcm_file
**rpcm_file
)
2091 struct snd_pcm_file
*pcm_file
;
2092 struct snd_pcm_substream
*substream
;
2093 struct snd_pcm_str
*str
;
2096 snd_assert(rpcm_file
!= NULL
, return -EINVAL
);
2099 err
= snd_pcm_open_substream(pcm
, stream
, file
, &substream
);
2103 pcm_file
= kzalloc(sizeof(*pcm_file
), GFP_KERNEL
);
2104 if (pcm_file
== NULL
) {
2105 snd_pcm_release_substream(substream
);
2108 pcm_file
->substream
= substream
;
2109 if (substream
->ref_count
== 1) {
2110 str
= substream
->pstr
;
2111 substream
->file
= pcm_file
;
2112 substream
->pcm_release
= pcm_release_private
;
2114 file
->private_data
= pcm_file
;
2115 *rpcm_file
= pcm_file
;
2119 static int snd_pcm_playback_open(struct inode
*inode
, struct file
*file
)
2121 struct snd_pcm
*pcm
;
2123 pcm
= snd_lookup_minor_data(iminor(inode
),
2124 SNDRV_DEVICE_TYPE_PCM_PLAYBACK
);
2125 return snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_PLAYBACK
);
2128 static int snd_pcm_capture_open(struct inode
*inode
, struct file
*file
)
2130 struct snd_pcm
*pcm
;
2132 pcm
= snd_lookup_minor_data(iminor(inode
),
2133 SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
2134 return snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_CAPTURE
);
2137 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
)
2140 struct snd_pcm_file
*pcm_file
;
2147 err
= snd_card_file_add(pcm
->card
, file
);
2150 if (!try_module_get(pcm
->card
->module
)) {
2154 init_waitqueue_entry(&wait
, current
);
2155 add_wait_queue(&pcm
->open_wait
, &wait
);
2156 mutex_lock(&pcm
->open_mutex
);
2158 err
= snd_pcm_open_file(file
, pcm
, stream
, &pcm_file
);
2161 if (err
== -EAGAIN
) {
2162 if (file
->f_flags
& O_NONBLOCK
) {
2168 set_current_state(TASK_INTERRUPTIBLE
);
2169 mutex_unlock(&pcm
->open_mutex
);
2171 mutex_lock(&pcm
->open_mutex
);
2172 if (signal_pending(current
)) {
2177 remove_wait_queue(&pcm
->open_wait
, &wait
);
2178 mutex_unlock(&pcm
->open_mutex
);
2184 module_put(pcm
->card
->module
);
2186 snd_card_file_remove(pcm
->card
, file
);
2191 static int snd_pcm_release(struct inode
*inode
, struct file
*file
)
2193 struct snd_pcm
*pcm
;
2194 struct snd_pcm_substream
*substream
;
2195 struct snd_pcm_file
*pcm_file
;
2197 pcm_file
= file
->private_data
;
2198 substream
= pcm_file
->substream
;
2199 snd_assert(substream
!= NULL
, return -ENXIO
);
2200 pcm
= substream
->pcm
;
2201 fasync_helper(-1, file
, 0, &substream
->runtime
->fasync
);
2202 mutex_lock(&pcm
->open_mutex
);
2203 snd_pcm_release_substream(substream
);
2205 mutex_unlock(&pcm
->open_mutex
);
2206 wake_up(&pcm
->open_wait
);
2207 module_put(pcm
->card
->module
);
2208 snd_card_file_remove(pcm
->card
, file
);
2212 static snd_pcm_sframes_t
snd_pcm_playback_rewind(struct snd_pcm_substream
*substream
,
2213 snd_pcm_uframes_t frames
)
2215 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2216 snd_pcm_sframes_t appl_ptr
;
2217 snd_pcm_sframes_t ret
;
2218 snd_pcm_sframes_t hw_avail
;
2223 snd_pcm_stream_lock_irq(substream
);
2224 switch (runtime
->status
->state
) {
2225 case SNDRV_PCM_STATE_PREPARED
:
2227 case SNDRV_PCM_STATE_DRAINING
:
2228 case SNDRV_PCM_STATE_RUNNING
:
2229 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2232 case SNDRV_PCM_STATE_XRUN
:
2240 hw_avail
= snd_pcm_playback_hw_avail(runtime
);
2241 if (hw_avail
<= 0) {
2245 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2248 frames
-= frames
% runtime
->xfer_align
;
2249 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2251 appl_ptr
+= runtime
->boundary
;
2252 runtime
->control
->appl_ptr
= appl_ptr
;
2253 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
&&
2255 snd_pcm_tick_prepare(substream
);
2258 snd_pcm_stream_unlock_irq(substream
);
2262 static snd_pcm_sframes_t
snd_pcm_capture_rewind(struct snd_pcm_substream
*substream
,
2263 snd_pcm_uframes_t frames
)
2265 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2266 snd_pcm_sframes_t appl_ptr
;
2267 snd_pcm_sframes_t ret
;
2268 snd_pcm_sframes_t hw_avail
;
2273 snd_pcm_stream_lock_irq(substream
);
2274 switch (runtime
->status
->state
) {
2275 case SNDRV_PCM_STATE_PREPARED
:
2276 case SNDRV_PCM_STATE_DRAINING
:
2278 case SNDRV_PCM_STATE_RUNNING
:
2279 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2282 case SNDRV_PCM_STATE_XRUN
:
2290 hw_avail
= snd_pcm_capture_hw_avail(runtime
);
2291 if (hw_avail
<= 0) {
2295 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2298 frames
-= frames
% runtime
->xfer_align
;
2299 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2301 appl_ptr
+= runtime
->boundary
;
2302 runtime
->control
->appl_ptr
= appl_ptr
;
2303 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
&&
2305 snd_pcm_tick_prepare(substream
);
2308 snd_pcm_stream_unlock_irq(substream
);
2312 static snd_pcm_sframes_t
snd_pcm_playback_forward(struct snd_pcm_substream
*substream
,
2313 snd_pcm_uframes_t frames
)
2315 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2316 snd_pcm_sframes_t appl_ptr
;
2317 snd_pcm_sframes_t ret
;
2318 snd_pcm_sframes_t avail
;
2323 snd_pcm_stream_lock_irq(substream
);
2324 switch (runtime
->status
->state
) {
2325 case SNDRV_PCM_STATE_PREPARED
:
2326 case SNDRV_PCM_STATE_PAUSED
:
2328 case SNDRV_PCM_STATE_DRAINING
:
2329 case SNDRV_PCM_STATE_RUNNING
:
2330 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2333 case SNDRV_PCM_STATE_XRUN
:
2341 avail
= snd_pcm_playback_avail(runtime
);
2346 if (frames
> (snd_pcm_uframes_t
)avail
)
2349 frames
-= frames
% runtime
->xfer_align
;
2350 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2351 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2352 appl_ptr
-= runtime
->boundary
;
2353 runtime
->control
->appl_ptr
= appl_ptr
;
2354 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
&&
2356 snd_pcm_tick_prepare(substream
);
2359 snd_pcm_stream_unlock_irq(substream
);
2363 static snd_pcm_sframes_t
snd_pcm_capture_forward(struct snd_pcm_substream
*substream
,
2364 snd_pcm_uframes_t frames
)
2366 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2367 snd_pcm_sframes_t appl_ptr
;
2368 snd_pcm_sframes_t ret
;
2369 snd_pcm_sframes_t avail
;
2374 snd_pcm_stream_lock_irq(substream
);
2375 switch (runtime
->status
->state
) {
2376 case SNDRV_PCM_STATE_PREPARED
:
2377 case SNDRV_PCM_STATE_DRAINING
:
2378 case SNDRV_PCM_STATE_PAUSED
:
2380 case SNDRV_PCM_STATE_RUNNING
:
2381 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2384 case SNDRV_PCM_STATE_XRUN
:
2392 avail
= snd_pcm_capture_avail(runtime
);
2397 if (frames
> (snd_pcm_uframes_t
)avail
)
2400 frames
-= frames
% runtime
->xfer_align
;
2401 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2402 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2403 appl_ptr
-= runtime
->boundary
;
2404 runtime
->control
->appl_ptr
= appl_ptr
;
2405 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
&&
2407 snd_pcm_tick_prepare(substream
);
2410 snd_pcm_stream_unlock_irq(substream
);
2414 static int snd_pcm_hwsync(struct snd_pcm_substream
*substream
)
2416 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2419 snd_pcm_stream_lock_irq(substream
);
2420 switch (runtime
->status
->state
) {
2421 case SNDRV_PCM_STATE_DRAINING
:
2422 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2424 case SNDRV_PCM_STATE_RUNNING
:
2425 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2428 case SNDRV_PCM_STATE_PREPARED
:
2429 case SNDRV_PCM_STATE_SUSPENDED
:
2432 case SNDRV_PCM_STATE_XRUN
:
2440 snd_pcm_stream_unlock_irq(substream
);
2444 static int snd_pcm_delay(struct snd_pcm_substream
*substream
,
2445 snd_pcm_sframes_t __user
*res
)
2447 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2449 snd_pcm_sframes_t n
= 0;
2451 snd_pcm_stream_lock_irq(substream
);
2452 switch (runtime
->status
->state
) {
2453 case SNDRV_PCM_STATE_DRAINING
:
2454 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2456 case SNDRV_PCM_STATE_RUNNING
:
2457 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2460 case SNDRV_PCM_STATE_PREPARED
:
2461 case SNDRV_PCM_STATE_SUSPENDED
:
2463 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2464 n
= snd_pcm_playback_hw_avail(runtime
);
2466 n
= snd_pcm_capture_avail(runtime
);
2468 case SNDRV_PCM_STATE_XRUN
:
2476 snd_pcm_stream_unlock_irq(substream
);
2478 if (put_user(n
, res
))
2483 static int snd_pcm_sync_ptr(struct snd_pcm_substream
*substream
,
2484 struct snd_pcm_sync_ptr __user
*_sync_ptr
)
2486 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2487 struct snd_pcm_sync_ptr sync_ptr
;
2488 volatile struct snd_pcm_mmap_status
*status
;
2489 volatile struct snd_pcm_mmap_control
*control
;
2492 memset(&sync_ptr
, 0, sizeof(sync_ptr
));
2493 if (get_user(sync_ptr
.flags
, (unsigned __user
*)&(_sync_ptr
->flags
)))
2495 if (copy_from_user(&sync_ptr
.c
.control
, &(_sync_ptr
->c
.control
), sizeof(struct snd_pcm_mmap_control
)))
2497 status
= runtime
->status
;
2498 control
= runtime
->control
;
2499 if (sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_HWSYNC
) {
2500 err
= snd_pcm_hwsync(substream
);
2504 snd_pcm_stream_lock_irq(substream
);
2505 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_APPL
))
2506 control
->appl_ptr
= sync_ptr
.c
.control
.appl_ptr
;
2508 sync_ptr
.c
.control
.appl_ptr
= control
->appl_ptr
;
2509 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_AVAIL_MIN
))
2510 control
->avail_min
= sync_ptr
.c
.control
.avail_min
;
2512 sync_ptr
.c
.control
.avail_min
= control
->avail_min
;
2513 sync_ptr
.s
.status
.state
= status
->state
;
2514 sync_ptr
.s
.status
.hw_ptr
= status
->hw_ptr
;
2515 sync_ptr
.s
.status
.tstamp
= status
->tstamp
;
2516 sync_ptr
.s
.status
.suspended_state
= status
->suspended_state
;
2517 snd_pcm_stream_unlock_irq(substream
);
2518 if (copy_to_user(_sync_ptr
, &sync_ptr
, sizeof(sync_ptr
)))
2523 static int snd_pcm_tstamp(struct snd_pcm_substream
*substream
, int __user
*_arg
)
2525 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2528 if (get_user(arg
, _arg
))
2530 if (arg
< 0 || arg
> SNDRV_PCM_TSTAMP_TYPE_LAST
)
2532 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY
;
2533 if (arg
== SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
)
2534 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
;
2538 static int snd_pcm_common_ioctl1(struct file
*file
,
2539 struct snd_pcm_substream
*substream
,
2540 unsigned int cmd
, void __user
*arg
)
2542 snd_assert(substream
!= NULL
, return -ENXIO
);
2545 case SNDRV_PCM_IOCTL_PVERSION
:
2546 return put_user(SNDRV_PCM_VERSION
, (int __user
*)arg
) ? -EFAULT
: 0;
2547 case SNDRV_PCM_IOCTL_INFO
:
2548 return snd_pcm_info_user(substream
, arg
);
2549 case SNDRV_PCM_IOCTL_TSTAMP
: /* just for compatibility */
2551 case SNDRV_PCM_IOCTL_TTSTAMP
:
2552 return snd_pcm_tstamp(substream
, arg
);
2553 case SNDRV_PCM_IOCTL_HW_REFINE
:
2554 return snd_pcm_hw_refine_user(substream
, arg
);
2555 case SNDRV_PCM_IOCTL_HW_PARAMS
:
2556 return snd_pcm_hw_params_user(substream
, arg
);
2557 case SNDRV_PCM_IOCTL_HW_FREE
:
2558 return snd_pcm_hw_free(substream
);
2559 case SNDRV_PCM_IOCTL_SW_PARAMS
:
2560 return snd_pcm_sw_params_user(substream
, arg
);
2561 case SNDRV_PCM_IOCTL_STATUS
:
2562 return snd_pcm_status_user(substream
, arg
);
2563 case SNDRV_PCM_IOCTL_CHANNEL_INFO
:
2564 return snd_pcm_channel_info_user(substream
, arg
);
2565 case SNDRV_PCM_IOCTL_PREPARE
:
2566 return snd_pcm_prepare(substream
, file
);
2567 case SNDRV_PCM_IOCTL_RESET
:
2568 return snd_pcm_reset(substream
);
2569 case SNDRV_PCM_IOCTL_START
:
2570 return snd_pcm_action_lock_irq(&snd_pcm_action_start
, substream
, SNDRV_PCM_STATE_RUNNING
);
2571 case SNDRV_PCM_IOCTL_LINK
:
2572 return snd_pcm_link(substream
, (int)(unsigned long) arg
);
2573 case SNDRV_PCM_IOCTL_UNLINK
:
2574 return snd_pcm_unlink(substream
);
2575 case SNDRV_PCM_IOCTL_RESUME
:
2576 return snd_pcm_resume(substream
);
2577 case SNDRV_PCM_IOCTL_XRUN
:
2578 return snd_pcm_xrun(substream
);
2579 case SNDRV_PCM_IOCTL_HWSYNC
:
2580 return snd_pcm_hwsync(substream
);
2581 case SNDRV_PCM_IOCTL_DELAY
:
2582 return snd_pcm_delay(substream
, arg
);
2583 case SNDRV_PCM_IOCTL_SYNC_PTR
:
2584 return snd_pcm_sync_ptr(substream
, arg
);
2585 #ifdef CONFIG_SND_SUPPORT_OLD_API
2586 case SNDRV_PCM_IOCTL_HW_REFINE_OLD
:
2587 return snd_pcm_hw_refine_old_user(substream
, arg
);
2588 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD
:
2589 return snd_pcm_hw_params_old_user(substream
, arg
);
2591 case SNDRV_PCM_IOCTL_DRAIN
:
2592 return snd_pcm_drain(substream
);
2593 case SNDRV_PCM_IOCTL_DROP
:
2594 return snd_pcm_drop(substream
);
2595 case SNDRV_PCM_IOCTL_PAUSE
:
2598 snd_pcm_stream_lock_irq(substream
);
2599 res
= snd_pcm_pause(substream
, (int)(unsigned long)arg
);
2600 snd_pcm_stream_unlock_irq(substream
);
2604 snd_printd("unknown ioctl = 0x%x\n", cmd
);
2608 static int snd_pcm_playback_ioctl1(struct file
*file
,
2609 struct snd_pcm_substream
*substream
,
2610 unsigned int cmd
, void __user
*arg
)
2612 snd_assert(substream
!= NULL
, return -ENXIO
);
2613 snd_assert(substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
, return -EINVAL
);
2615 case SNDRV_PCM_IOCTL_WRITEI_FRAMES
:
2617 struct snd_xferi xferi
;
2618 struct snd_xferi __user
*_xferi
= arg
;
2619 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2620 snd_pcm_sframes_t result
;
2621 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2623 if (put_user(0, &_xferi
->result
))
2625 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2627 result
= snd_pcm_lib_write(substream
, xferi
.buf
, xferi
.frames
);
2628 __put_user(result
, &_xferi
->result
);
2629 return result
< 0 ? result
: 0;
2631 case SNDRV_PCM_IOCTL_WRITEN_FRAMES
:
2633 struct snd_xfern xfern
;
2634 struct snd_xfern __user
*_xfern
= arg
;
2635 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2637 snd_pcm_sframes_t result
;
2638 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2640 if (runtime
->channels
> 128)
2642 if (put_user(0, &_xfern
->result
))
2644 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2646 bufs
= kmalloc(sizeof(void *) * runtime
->channels
, GFP_KERNEL
);
2649 if (copy_from_user(bufs
, xfern
.bufs
, sizeof(void *) * runtime
->channels
)) {
2653 result
= snd_pcm_lib_writev(substream
, bufs
, xfern
.frames
);
2655 __put_user(result
, &_xfern
->result
);
2656 return result
< 0 ? result
: 0;
2658 case SNDRV_PCM_IOCTL_REWIND
:
2660 snd_pcm_uframes_t frames
;
2661 snd_pcm_uframes_t __user
*_frames
= arg
;
2662 snd_pcm_sframes_t result
;
2663 if (get_user(frames
, _frames
))
2665 if (put_user(0, _frames
))
2667 result
= snd_pcm_playback_rewind(substream
, frames
);
2668 __put_user(result
, _frames
);
2669 return result
< 0 ? result
: 0;
2671 case SNDRV_PCM_IOCTL_FORWARD
:
2673 snd_pcm_uframes_t frames
;
2674 snd_pcm_uframes_t __user
*_frames
= arg
;
2675 snd_pcm_sframes_t result
;
2676 if (get_user(frames
, _frames
))
2678 if (put_user(0, _frames
))
2680 result
= snd_pcm_playback_forward(substream
, frames
);
2681 __put_user(result
, _frames
);
2682 return result
< 0 ? result
: 0;
2685 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2688 static int snd_pcm_capture_ioctl1(struct file
*file
,
2689 struct snd_pcm_substream
*substream
,
2690 unsigned int cmd
, void __user
*arg
)
2692 snd_assert(substream
!= NULL
, return -ENXIO
);
2693 snd_assert(substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
, return -EINVAL
);
2695 case SNDRV_PCM_IOCTL_READI_FRAMES
:
2697 struct snd_xferi xferi
;
2698 struct snd_xferi __user
*_xferi
= arg
;
2699 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2700 snd_pcm_sframes_t result
;
2701 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2703 if (put_user(0, &_xferi
->result
))
2705 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2707 result
= snd_pcm_lib_read(substream
, xferi
.buf
, xferi
.frames
);
2708 __put_user(result
, &_xferi
->result
);
2709 return result
< 0 ? result
: 0;
2711 case SNDRV_PCM_IOCTL_READN_FRAMES
:
2713 struct snd_xfern xfern
;
2714 struct snd_xfern __user
*_xfern
= arg
;
2715 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2717 snd_pcm_sframes_t result
;
2718 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2720 if (runtime
->channels
> 128)
2722 if (put_user(0, &_xfern
->result
))
2724 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2726 bufs
= kmalloc(sizeof(void *) * runtime
->channels
, GFP_KERNEL
);
2729 if (copy_from_user(bufs
, xfern
.bufs
, sizeof(void *) * runtime
->channels
)) {
2733 result
= snd_pcm_lib_readv(substream
, bufs
, xfern
.frames
);
2735 __put_user(result
, &_xfern
->result
);
2736 return result
< 0 ? result
: 0;
2738 case SNDRV_PCM_IOCTL_REWIND
:
2740 snd_pcm_uframes_t frames
;
2741 snd_pcm_uframes_t __user
*_frames
= arg
;
2742 snd_pcm_sframes_t result
;
2743 if (get_user(frames
, _frames
))
2745 if (put_user(0, _frames
))
2747 result
= snd_pcm_capture_rewind(substream
, frames
);
2748 __put_user(result
, _frames
);
2749 return result
< 0 ? result
: 0;
2751 case SNDRV_PCM_IOCTL_FORWARD
:
2753 snd_pcm_uframes_t frames
;
2754 snd_pcm_uframes_t __user
*_frames
= arg
;
2755 snd_pcm_sframes_t result
;
2756 if (get_user(frames
, _frames
))
2758 if (put_user(0, _frames
))
2760 result
= snd_pcm_capture_forward(substream
, frames
);
2761 __put_user(result
, _frames
);
2762 return result
< 0 ? result
: 0;
2765 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2768 static long snd_pcm_playback_ioctl(struct file
*file
, unsigned int cmd
,
2771 struct snd_pcm_file
*pcm_file
;
2773 pcm_file
= file
->private_data
;
2775 if (((cmd
>> 8) & 0xff) != 'A')
2778 return snd_pcm_playback_ioctl1(file
, pcm_file
->substream
, cmd
,
2779 (void __user
*)arg
);
2782 static long snd_pcm_capture_ioctl(struct file
*file
, unsigned int cmd
,
2785 struct snd_pcm_file
*pcm_file
;
2787 pcm_file
= file
->private_data
;
2789 if (((cmd
>> 8) & 0xff) != 'A')
2792 return snd_pcm_capture_ioctl1(file
, pcm_file
->substream
, cmd
,
2793 (void __user
*)arg
);
2796 int snd_pcm_kernel_ioctl(struct snd_pcm_substream
*substream
,
2797 unsigned int cmd
, void *arg
)
2802 fs
= snd_enter_user();
2803 switch (substream
->stream
) {
2804 case SNDRV_PCM_STREAM_PLAYBACK
:
2805 result
= snd_pcm_playback_ioctl1(NULL
, substream
, cmd
,
2806 (void __user
*)arg
);
2808 case SNDRV_PCM_STREAM_CAPTURE
:
2809 result
= snd_pcm_capture_ioctl1(NULL
, substream
, cmd
,
2810 (void __user
*)arg
);
2820 EXPORT_SYMBOL(snd_pcm_kernel_ioctl
);
2822 static ssize_t
snd_pcm_read(struct file
*file
, char __user
*buf
, size_t count
,
2825 struct snd_pcm_file
*pcm_file
;
2826 struct snd_pcm_substream
*substream
;
2827 struct snd_pcm_runtime
*runtime
;
2828 snd_pcm_sframes_t result
;
2830 pcm_file
= file
->private_data
;
2831 substream
= pcm_file
->substream
;
2832 snd_assert(substream
!= NULL
, return -ENXIO
);
2833 runtime
= substream
->runtime
;
2834 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2836 if (!frame_aligned(runtime
, count
))
2838 count
= bytes_to_frames(runtime
, count
);
2839 result
= snd_pcm_lib_read(substream
, buf
, count
);
2841 result
= frames_to_bytes(runtime
, result
);
2845 static ssize_t
snd_pcm_write(struct file
*file
, const char __user
*buf
,
2846 size_t count
, loff_t
* offset
)
2848 struct snd_pcm_file
*pcm_file
;
2849 struct snd_pcm_substream
*substream
;
2850 struct snd_pcm_runtime
*runtime
;
2851 snd_pcm_sframes_t result
;
2853 pcm_file
= file
->private_data
;
2854 substream
= pcm_file
->substream
;
2855 snd_assert(substream
!= NULL
, result
= -ENXIO
; goto end
);
2856 runtime
= substream
->runtime
;
2857 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
2861 if (!frame_aligned(runtime
, count
)) {
2865 count
= bytes_to_frames(runtime
, count
);
2866 result
= snd_pcm_lib_write(substream
, buf
, count
);
2868 result
= frames_to_bytes(runtime
, result
);
2873 static ssize_t
snd_pcm_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
2874 unsigned long nr_segs
, loff_t pos
)
2877 struct snd_pcm_file
*pcm_file
;
2878 struct snd_pcm_substream
*substream
;
2879 struct snd_pcm_runtime
*runtime
;
2880 snd_pcm_sframes_t result
;
2883 snd_pcm_uframes_t frames
;
2885 pcm_file
= iocb
->ki_filp
->private_data
;
2886 substream
= pcm_file
->substream
;
2887 snd_assert(substream
!= NULL
, return -ENXIO
);
2888 runtime
= substream
->runtime
;
2889 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2891 if (nr_segs
> 1024 || nr_segs
!= runtime
->channels
)
2893 if (!frame_aligned(runtime
, iov
->iov_len
))
2895 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2896 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2899 for (i
= 0; i
< nr_segs
; ++i
)
2900 bufs
[i
] = iov
[i
].iov_base
;
2901 result
= snd_pcm_lib_readv(substream
, bufs
, frames
);
2903 result
= frames_to_bytes(runtime
, result
);
2908 static ssize_t
snd_pcm_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
2909 unsigned long nr_segs
, loff_t pos
)
2911 struct snd_pcm_file
*pcm_file
;
2912 struct snd_pcm_substream
*substream
;
2913 struct snd_pcm_runtime
*runtime
;
2914 snd_pcm_sframes_t result
;
2917 snd_pcm_uframes_t frames
;
2919 pcm_file
= iocb
->ki_filp
->private_data
;
2920 substream
= pcm_file
->substream
;
2921 snd_assert(substream
!= NULL
, result
= -ENXIO
; goto end
);
2922 runtime
= substream
->runtime
;
2923 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
2927 if (nr_segs
> 128 || nr_segs
!= runtime
->channels
||
2928 !frame_aligned(runtime
, iov
->iov_len
)) {
2932 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2933 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2936 for (i
= 0; i
< nr_segs
; ++i
)
2937 bufs
[i
] = iov
[i
].iov_base
;
2938 result
= snd_pcm_lib_writev(substream
, bufs
, frames
);
2940 result
= frames_to_bytes(runtime
, result
);
2946 static unsigned int snd_pcm_playback_poll(struct file
*file
, poll_table
* wait
)
2948 struct snd_pcm_file
*pcm_file
;
2949 struct snd_pcm_substream
*substream
;
2950 struct snd_pcm_runtime
*runtime
;
2952 snd_pcm_uframes_t avail
;
2954 pcm_file
= file
->private_data
;
2956 substream
= pcm_file
->substream
;
2957 snd_assert(substream
!= NULL
, return -ENXIO
);
2958 runtime
= substream
->runtime
;
2960 poll_wait(file
, &runtime
->sleep
, wait
);
2962 snd_pcm_stream_lock_irq(substream
);
2963 avail
= snd_pcm_playback_avail(runtime
);
2964 switch (runtime
->status
->state
) {
2965 case SNDRV_PCM_STATE_RUNNING
:
2966 case SNDRV_PCM_STATE_PREPARED
:
2967 case SNDRV_PCM_STATE_PAUSED
:
2968 if (avail
>= runtime
->control
->avail_min
) {
2969 mask
= POLLOUT
| POLLWRNORM
;
2973 case SNDRV_PCM_STATE_DRAINING
:
2977 mask
= POLLOUT
| POLLWRNORM
| POLLERR
;
2980 snd_pcm_stream_unlock_irq(substream
);
2984 static unsigned int snd_pcm_capture_poll(struct file
*file
, poll_table
* wait
)
2986 struct snd_pcm_file
*pcm_file
;
2987 struct snd_pcm_substream
*substream
;
2988 struct snd_pcm_runtime
*runtime
;
2990 snd_pcm_uframes_t avail
;
2992 pcm_file
= file
->private_data
;
2994 substream
= pcm_file
->substream
;
2995 snd_assert(substream
!= NULL
, return -ENXIO
);
2996 runtime
= substream
->runtime
;
2998 poll_wait(file
, &runtime
->sleep
, wait
);
3000 snd_pcm_stream_lock_irq(substream
);
3001 avail
= snd_pcm_capture_avail(runtime
);
3002 switch (runtime
->status
->state
) {
3003 case SNDRV_PCM_STATE_RUNNING
:
3004 case SNDRV_PCM_STATE_PREPARED
:
3005 case SNDRV_PCM_STATE_PAUSED
:
3006 if (avail
>= runtime
->control
->avail_min
) {
3007 mask
= POLLIN
| POLLRDNORM
;
3012 case SNDRV_PCM_STATE_DRAINING
:
3014 mask
= POLLIN
| POLLRDNORM
;
3019 mask
= POLLIN
| POLLRDNORM
| POLLERR
;
3022 snd_pcm_stream_unlock_irq(substream
);
3031 * Only on coherent architectures, we can mmap the status and the control records
3032 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3034 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3036 * mmap status record
3038 static int snd_pcm_mmap_status_fault(struct vm_area_struct
*area
,
3039 struct vm_fault
*vmf
)
3041 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3042 struct snd_pcm_runtime
*runtime
;
3044 if (substream
== NULL
)
3045 return VM_FAULT_SIGBUS
;
3046 runtime
= substream
->runtime
;
3047 vmf
->page
= virt_to_page(runtime
->status
);
3048 get_page(vmf
->page
);
3052 static struct vm_operations_struct snd_pcm_vm_ops_status
=
3054 .fault
= snd_pcm_mmap_status_fault
,
3057 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3058 struct vm_area_struct
*area
)
3060 struct snd_pcm_runtime
*runtime
;
3062 if (!(area
->vm_flags
& VM_READ
))
3064 runtime
= substream
->runtime
;
3065 snd_assert(runtime
!= NULL
, return -EAGAIN
);
3066 size
= area
->vm_end
- area
->vm_start
;
3067 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)))
3069 area
->vm_ops
= &snd_pcm_vm_ops_status
;
3070 area
->vm_private_data
= substream
;
3071 area
->vm_flags
|= VM_RESERVED
;
3076 * mmap control record
3078 static int snd_pcm_mmap_control_fault(struct vm_area_struct
*area
,
3079 struct vm_fault
*vmf
)
3081 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3082 struct snd_pcm_runtime
*runtime
;
3084 if (substream
== NULL
)
3085 return VM_FAULT_SIGBUS
;
3086 runtime
= substream
->runtime
;
3087 vmf
->page
= virt_to_page(runtime
->control
);
3088 get_page(vmf
->page
);
3092 static struct vm_operations_struct snd_pcm_vm_ops_control
=
3094 .fault
= snd_pcm_mmap_control_fault
,
3097 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3098 struct vm_area_struct
*area
)
3100 struct snd_pcm_runtime
*runtime
;
3102 if (!(area
->vm_flags
& VM_READ
))
3104 runtime
= substream
->runtime
;
3105 snd_assert(runtime
!= NULL
, return -EAGAIN
);
3106 size
= area
->vm_end
- area
->vm_start
;
3107 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
)))
3109 area
->vm_ops
= &snd_pcm_vm_ops_control
;
3110 area
->vm_private_data
= substream
;
3111 area
->vm_flags
|= VM_RESERVED
;
3114 #else /* ! coherent mmap */
3116 * don't support mmap for status and control records.
3118 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3119 struct vm_area_struct
*area
)
3123 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3124 struct vm_area_struct
*area
)
3128 #endif /* coherent mmap */
3131 * fault callback for mmapping a RAM page
3133 static int snd_pcm_mmap_data_fault(struct vm_area_struct
*area
,
3134 struct vm_fault
*vmf
)
3136 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3137 struct snd_pcm_runtime
*runtime
;
3138 unsigned long offset
;
3143 if (substream
== NULL
)
3144 return VM_FAULT_SIGBUS
;
3145 runtime
= substream
->runtime
;
3146 offset
= vmf
->pgoff
<< PAGE_SHIFT
;
3147 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3148 if (offset
> dma_bytes
- PAGE_SIZE
)
3149 return VM_FAULT_SIGBUS
;
3150 if (substream
->ops
->page
) {
3151 page
= substream
->ops
->page(substream
, offset
);
3153 return VM_FAULT_SIGBUS
;
3155 vaddr
= runtime
->dma_area
+ offset
;
3156 page
= virt_to_page(vaddr
);
3163 static struct vm_operations_struct snd_pcm_vm_ops_data
=
3165 .open
= snd_pcm_mmap_data_open
,
3166 .close
= snd_pcm_mmap_data_close
,
3167 .fault
= snd_pcm_mmap_data_fault
,
3171 * mmap the DMA buffer on RAM
3173 static int snd_pcm_default_mmap(struct snd_pcm_substream
*substream
,
3174 struct vm_area_struct
*area
)
3176 area
->vm_ops
= &snd_pcm_vm_ops_data
;
3177 area
->vm_private_data
= substream
;
3178 area
->vm_flags
|= VM_RESERVED
;
3179 atomic_inc(&substream
->mmap_count
);
3184 * mmap the DMA buffer on I/O memory area
3186 #if SNDRV_PCM_INFO_MMAP_IOMEM
3187 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio
=
3189 .open
= snd_pcm_mmap_data_open
,
3190 .close
= snd_pcm_mmap_data_close
,
3193 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream
*substream
,
3194 struct vm_area_struct
*area
)
3197 unsigned long offset
;
3199 #ifdef pgprot_noncached
3200 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3202 area
->vm_ops
= &snd_pcm_vm_ops_data_mmio
;
3203 area
->vm_private_data
= substream
;
3204 area
->vm_flags
|= VM_IO
;
3205 size
= area
->vm_end
- area
->vm_start
;
3206 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3207 if (io_remap_pfn_range(area
, area
->vm_start
,
3208 (substream
->runtime
->dma_addr
+ offset
) >> PAGE_SHIFT
,
3209 size
, area
->vm_page_prot
))
3211 atomic_inc(&substream
->mmap_count
);
3215 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem
);
3216 #endif /* SNDRV_PCM_INFO_MMAP */
3221 int snd_pcm_mmap_data(struct snd_pcm_substream
*substream
, struct file
*file
,
3222 struct vm_area_struct
*area
)
3224 struct snd_pcm_runtime
*runtime
;
3226 unsigned long offset
;
3229 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
3230 if (!(area
->vm_flags
& (VM_WRITE
|VM_READ
)))
3233 if (!(area
->vm_flags
& VM_READ
))
3236 runtime
= substream
->runtime
;
3237 snd_assert(runtime
!= NULL
, return -EAGAIN
);
3238 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3240 if (!(runtime
->info
& SNDRV_PCM_INFO_MMAP
))
3242 if (runtime
->access
== SNDRV_PCM_ACCESS_RW_INTERLEAVED
||
3243 runtime
->access
== SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
)
3245 size
= area
->vm_end
- area
->vm_start
;
3246 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3247 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3248 if ((size_t)size
> dma_bytes
)
3250 if (offset
> dma_bytes
- size
)
3253 if (substream
->ops
->mmap
)
3254 return substream
->ops
->mmap(substream
, area
);
3256 return snd_pcm_default_mmap(substream
, area
);
3259 EXPORT_SYMBOL(snd_pcm_mmap_data
);
3261 static int snd_pcm_mmap(struct file
*file
, struct vm_area_struct
*area
)
3263 struct snd_pcm_file
* pcm_file
;
3264 struct snd_pcm_substream
*substream
;
3265 unsigned long offset
;
3267 pcm_file
= file
->private_data
;
3268 substream
= pcm_file
->substream
;
3269 snd_assert(substream
!= NULL
, return -ENXIO
);
3271 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3273 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3274 if (pcm_file
->no_compat_mmap
)
3276 return snd_pcm_mmap_status(substream
, file
, area
);
3277 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3278 if (pcm_file
->no_compat_mmap
)
3280 return snd_pcm_mmap_control(substream
, file
, area
);
3282 return snd_pcm_mmap_data(substream
, file
, area
);
3287 static int snd_pcm_fasync(int fd
, struct file
* file
, int on
)
3289 struct snd_pcm_file
* pcm_file
;
3290 struct snd_pcm_substream
*substream
;
3291 struct snd_pcm_runtime
*runtime
;
3294 pcm_file
= file
->private_data
;
3295 substream
= pcm_file
->substream
;
3296 snd_assert(substream
!= NULL
, return -ENXIO
);
3297 runtime
= substream
->runtime
;
3299 err
= fasync_helper(fd
, file
, on
, &runtime
->fasync
);
3308 #ifdef CONFIG_COMPAT
3309 #include "pcm_compat.c"
3311 #define snd_pcm_ioctl_compat NULL
3315 * To be removed helpers to keep binary compatibility
3318 #ifdef CONFIG_SND_SUPPORT_OLD_API
3319 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3320 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3322 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params
*params
,
3323 struct snd_pcm_hw_params_old
*oparams
)
3327 memset(params
, 0, sizeof(*params
));
3328 params
->flags
= oparams
->flags
;
3329 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3330 params
->masks
[i
].bits
[0] = oparams
->masks
[i
];
3331 memcpy(params
->intervals
, oparams
->intervals
, sizeof(oparams
->intervals
));
3332 params
->rmask
= __OLD_TO_NEW_MASK(oparams
->rmask
);
3333 params
->cmask
= __OLD_TO_NEW_MASK(oparams
->cmask
);
3334 params
->info
= oparams
->info
;
3335 params
->msbits
= oparams
->msbits
;
3336 params
->rate_num
= oparams
->rate_num
;
3337 params
->rate_den
= oparams
->rate_den
;
3338 params
->fifo_size
= oparams
->fifo_size
;
3341 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old
*oparams
,
3342 struct snd_pcm_hw_params
*params
)
3346 memset(oparams
, 0, sizeof(*oparams
));
3347 oparams
->flags
= params
->flags
;
3348 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3349 oparams
->masks
[i
] = params
->masks
[i
].bits
[0];
3350 memcpy(oparams
->intervals
, params
->intervals
, sizeof(oparams
->intervals
));
3351 oparams
->rmask
= __NEW_TO_OLD_MASK(params
->rmask
);
3352 oparams
->cmask
= __NEW_TO_OLD_MASK(params
->cmask
);
3353 oparams
->info
= params
->info
;
3354 oparams
->msbits
= params
->msbits
;
3355 oparams
->rate_num
= params
->rate_num
;
3356 oparams
->rate_den
= params
->rate_den
;
3357 oparams
->fifo_size
= params
->fifo_size
;
3360 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
3361 struct snd_pcm_hw_params_old __user
* _oparams
)
3363 struct snd_pcm_hw_params
*params
;
3364 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3367 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3372 oparams
= kmalloc(sizeof(*oparams
), GFP_KERNEL
);
3378 if (copy_from_user(oparams
, _oparams
, sizeof(*oparams
))) {
3382 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3383 err
= snd_pcm_hw_refine(substream
, params
);
3384 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3385 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3395 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
3396 struct snd_pcm_hw_params_old __user
* _oparams
)
3398 struct snd_pcm_hw_params
*params
;
3399 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3402 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3407 oparams
= kmalloc(sizeof(*oparams
), GFP_KERNEL
);
3412 if (copy_from_user(oparams
, _oparams
, sizeof(*oparams
))) {
3416 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3417 err
= snd_pcm_hw_params(substream
, params
);
3418 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3419 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3428 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3434 const struct file_operations snd_pcm_f_ops
[2] = {
3436 .owner
= THIS_MODULE
,
3437 .write
= snd_pcm_write
,
3438 .aio_write
= snd_pcm_aio_write
,
3439 .open
= snd_pcm_playback_open
,
3440 .release
= snd_pcm_release
,
3441 .poll
= snd_pcm_playback_poll
,
3442 .unlocked_ioctl
= snd_pcm_playback_ioctl
,
3443 .compat_ioctl
= snd_pcm_ioctl_compat
,
3444 .mmap
= snd_pcm_mmap
,
3445 .fasync
= snd_pcm_fasync
,
3448 .owner
= THIS_MODULE
,
3449 .read
= snd_pcm_read
,
3450 .aio_read
= snd_pcm_aio_read
,
3451 .open
= snd_pcm_capture_open
,
3452 .release
= snd_pcm_release
,
3453 .poll
= snd_pcm_capture_poll
,
3454 .unlocked_ioctl
= snd_pcm_capture_ioctl
,
3455 .compat_ioctl
= snd_pcm_ioctl_compat
,
3456 .mmap
= snd_pcm_mmap
,
3457 .fasync
= snd_pcm_fasync
,