2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@suse.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/smp_lock.h>
25 #include <linux/file.h>
26 #include <linux/slab.h>
27 #include <linux/time.h>
28 #include <linux/latency.h>
29 #include <linux/uio.h>
30 #include <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/info.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/timer.h>
36 #include <sound/minors.h>
43 struct snd_pcm_hw_params_old
{
45 unsigned int masks
[SNDRV_PCM_HW_PARAM_SUBFORMAT
-
46 SNDRV_PCM_HW_PARAM_ACCESS
+ 1];
47 struct snd_interval intervals
[SNDRV_PCM_HW_PARAM_TICK_TIME
-
48 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
+ 1];
53 unsigned int rate_num
;
54 unsigned int rate_den
;
55 snd_pcm_uframes_t fifo_size
;
56 unsigned char reserved
[64];
59 #ifdef CONFIG_SND_SUPPORT_OLD_API
60 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
61 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
63 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
64 struct snd_pcm_hw_params_old __user
* _oparams
);
65 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
66 struct snd_pcm_hw_params_old __user
* _oparams
);
68 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
);
74 DEFINE_RWLOCK(snd_pcm_link_rwlock
);
75 EXPORT_SYMBOL(snd_pcm_link_rwlock
);
77 static DECLARE_RWSEM(snd_pcm_link_rwsem
);
79 static inline mm_segment_t
snd_enter_user(void)
81 mm_segment_t fs
= get_fs();
86 static inline void snd_leave_user(mm_segment_t fs
)
93 int snd_pcm_info(struct snd_pcm_substream
*substream
, struct snd_pcm_info
*info
)
95 struct snd_pcm_runtime
*runtime
;
96 struct snd_pcm
*pcm
= substream
->pcm
;
97 struct snd_pcm_str
*pstr
= substream
->pstr
;
99 snd_assert(substream
!= NULL
, return -ENXIO
);
100 memset(info
, 0, sizeof(*info
));
101 info
->card
= pcm
->card
->number
;
102 info
->device
= pcm
->device
;
103 info
->stream
= substream
->stream
;
104 info
->subdevice
= substream
->number
;
105 strlcpy(info
->id
, pcm
->id
, sizeof(info
->id
));
106 strlcpy(info
->name
, pcm
->name
, sizeof(info
->name
));
107 info
->dev_class
= pcm
->dev_class
;
108 info
->dev_subclass
= pcm
->dev_subclass
;
109 info
->subdevices_count
= pstr
->substream_count
;
110 info
->subdevices_avail
= pstr
->substream_count
- pstr
->substream_opened
;
111 strlcpy(info
->subname
, substream
->name
, sizeof(info
->subname
));
112 runtime
= substream
->runtime
;
113 /* AB: FIXME!!! This is definitely nonsense */
115 info
->sync
= runtime
->sync
;
116 substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_INFO
, info
);
121 int snd_pcm_info_user(struct snd_pcm_substream
*substream
,
122 struct snd_pcm_info __user
* _info
)
124 struct snd_pcm_info
*info
;
127 info
= kmalloc(sizeof(*info
), GFP_KERNEL
);
130 err
= snd_pcm_info(substream
, info
);
132 if (copy_to_user(_info
, info
, sizeof(*info
)))
142 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
143 char *snd_pcm_hw_param_names
[] = {
147 HW_PARAM(SAMPLE_BITS
),
148 HW_PARAM(FRAME_BITS
),
151 HW_PARAM(PERIOD_TIME
),
152 HW_PARAM(PERIOD_SIZE
),
153 HW_PARAM(PERIOD_BYTES
),
155 HW_PARAM(BUFFER_TIME
),
156 HW_PARAM(BUFFER_SIZE
),
157 HW_PARAM(BUFFER_BYTES
),
162 int snd_pcm_hw_refine(struct snd_pcm_substream
*substream
,
163 struct snd_pcm_hw_params
*params
)
166 struct snd_pcm_hardware
*hw
;
167 struct snd_interval
*i
= NULL
;
168 struct snd_mask
*m
= NULL
;
169 struct snd_pcm_hw_constraints
*constrs
= &substream
->runtime
->hw_constraints
;
170 unsigned int rstamps
[constrs
->rules_num
];
171 unsigned int vstamps
[SNDRV_PCM_HW_PARAM_LAST_INTERVAL
+ 1];
172 unsigned int stamp
= 2;
176 params
->fifo_size
= 0;
177 if (params
->rmask
& (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS
))
179 if (params
->rmask
& (1 << SNDRV_PCM_HW_PARAM_RATE
)) {
180 params
->rate_num
= 0;
181 params
->rate_den
= 0;
184 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
185 m
= hw_param_mask(params
, k
);
186 if (snd_mask_empty(m
))
188 if (!(params
->rmask
& (1 << k
)))
191 printk("%s = ", snd_pcm_hw_param_names
[k
]);
192 printk("%04x%04x%04x%04x -> ", m
->bits
[3], m
->bits
[2], m
->bits
[1], m
->bits
[0]);
194 changed
= snd_mask_refine(m
, constrs_mask(constrs
, k
));
196 printk("%04x%04x%04x%04x\n", m
->bits
[3], m
->bits
[2], m
->bits
[1], m
->bits
[0]);
199 params
->cmask
|= 1 << k
;
204 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
205 i
= hw_param_interval(params
, k
);
206 if (snd_interval_empty(i
))
208 if (!(params
->rmask
& (1 << k
)))
211 printk("%s = ", snd_pcm_hw_param_names
[k
]);
216 i
->openmin
? '(' : '[', i
->min
,
217 i
->max
, i
->openmax
? ')' : ']');
220 changed
= snd_interval_refine(i
, constrs_interval(constrs
, k
));
225 printk("%c%u %u%c\n",
226 i
->openmin
? '(' : '[', i
->min
,
227 i
->max
, i
->openmax
? ')' : ']');
230 params
->cmask
|= 1 << k
;
235 for (k
= 0; k
< constrs
->rules_num
; k
++)
237 for (k
= 0; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++)
238 vstamps
[k
] = (params
->rmask
& (1 << k
)) ? 1 : 0;
241 for (k
= 0; k
< constrs
->rules_num
; k
++) {
242 struct snd_pcm_hw_rule
*r
= &constrs
->rules
[k
];
245 if (r
->cond
&& !(r
->cond
& params
->flags
))
247 for (d
= 0; r
->deps
[d
] >= 0; d
++) {
248 if (vstamps
[r
->deps
[d
]] > rstamps
[k
]) {
256 printk("Rule %d [%p]: ", k
, r
->func
);
258 printk("%s = ", snd_pcm_hw_param_names
[r
->var
]);
259 if (hw_is_mask(r
->var
)) {
260 m
= hw_param_mask(params
, r
->var
);
261 printk("%x", *m
->bits
);
263 i
= hw_param_interval(params
, r
->var
);
268 i
->openmin
? '(' : '[', i
->min
,
269 i
->max
, i
->openmax
? ')' : ']');
273 changed
= r
->func(params
, r
);
277 if (hw_is_mask(r
->var
))
278 printk("%x", *m
->bits
);
284 i
->openmin
? '(' : '[', i
->min
,
285 i
->max
, i
->openmax
? ')' : ']');
291 if (changed
&& r
->var
>= 0) {
292 params
->cmask
|= (1 << r
->var
);
293 vstamps
[r
->var
] = stamp
;
301 if (!params
->msbits
) {
302 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
);
303 if (snd_interval_single(i
))
304 params
->msbits
= snd_interval_value(i
);
307 if (!params
->rate_den
) {
308 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
309 if (snd_interval_single(i
)) {
310 params
->rate_num
= snd_interval_value(i
);
311 params
->rate_den
= 1;
315 hw
= &substream
->runtime
->hw
;
317 params
->info
= hw
->info
;
318 if (!params
->fifo_size
)
319 params
->fifo_size
= hw
->fifo_size
;
324 EXPORT_SYMBOL(snd_pcm_hw_refine
);
326 static int snd_pcm_hw_refine_user(struct snd_pcm_substream
*substream
,
327 struct snd_pcm_hw_params __user
* _params
)
329 struct snd_pcm_hw_params
*params
;
332 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
337 if (copy_from_user(params
, _params
, sizeof(*params
))) {
341 err
= snd_pcm_hw_refine(substream
, params
);
342 if (copy_to_user(_params
, params
, sizeof(*params
))) {
351 static int period_to_usecs(struct snd_pcm_runtime
*runtime
)
356 return -1; /* invalid */
358 /* take 75% of period time as the deadline */
359 usecs
= (750000 / runtime
->rate
) * runtime
->period_size
;
360 usecs
+= ((750000 % runtime
->rate
) * runtime
->period_size
) /
366 static int snd_pcm_hw_params(struct snd_pcm_substream
*substream
,
367 struct snd_pcm_hw_params
*params
)
369 struct snd_pcm_runtime
*runtime
;
372 snd_pcm_uframes_t frames
;
374 snd_assert(substream
!= NULL
, return -ENXIO
);
375 runtime
= substream
->runtime
;
376 snd_assert(runtime
!= NULL
, return -ENXIO
);
377 snd_pcm_stream_lock_irq(substream
);
378 switch (runtime
->status
->state
) {
379 case SNDRV_PCM_STATE_OPEN
:
380 case SNDRV_PCM_STATE_SETUP
:
381 case SNDRV_PCM_STATE_PREPARED
:
384 snd_pcm_stream_unlock_irq(substream
);
387 snd_pcm_stream_unlock_irq(substream
);
388 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
389 if (!substream
->oss
.oss
)
391 if (atomic_read(&substream
->mmap_count
))
395 err
= snd_pcm_hw_refine(substream
, params
);
399 err
= snd_pcm_hw_params_choose(substream
, params
);
403 if (substream
->ops
->hw_params
!= NULL
) {
404 err
= substream
->ops
->hw_params(substream
, params
);
409 runtime
->access
= params_access(params
);
410 runtime
->format
= params_format(params
);
411 runtime
->subformat
= params_subformat(params
);
412 runtime
->channels
= params_channels(params
);
413 runtime
->rate
= params_rate(params
);
414 runtime
->period_size
= params_period_size(params
);
415 runtime
->periods
= params_periods(params
);
416 runtime
->buffer_size
= params_buffer_size(params
);
417 runtime
->tick_time
= params_tick_time(params
);
418 runtime
->info
= params
->info
;
419 runtime
->rate_num
= params
->rate_num
;
420 runtime
->rate_den
= params
->rate_den
;
422 bits
= snd_pcm_format_physical_width(runtime
->format
);
423 runtime
->sample_bits
= bits
;
424 bits
*= runtime
->channels
;
425 runtime
->frame_bits
= bits
;
427 while (bits
% 8 != 0) {
431 runtime
->byte_align
= bits
/ 8;
432 runtime
->min_align
= frames
;
434 /* Default sw params */
435 runtime
->tstamp_mode
= SNDRV_PCM_TSTAMP_NONE
;
436 runtime
->period_step
= 1;
437 runtime
->sleep_min
= 0;
438 runtime
->control
->avail_min
= runtime
->period_size
;
439 runtime
->xfer_align
= runtime
->period_size
;
440 runtime
->start_threshold
= 1;
441 runtime
->stop_threshold
= runtime
->buffer_size
;
442 runtime
->silence_threshold
= 0;
443 runtime
->silence_size
= 0;
444 runtime
->boundary
= runtime
->buffer_size
;
445 while (runtime
->boundary
* 2 <= LONG_MAX
- runtime
->buffer_size
)
446 runtime
->boundary
*= 2;
448 snd_pcm_timer_resolution_change(substream
);
449 runtime
->status
->state
= SNDRV_PCM_STATE_SETUP
;
451 remove_acceptable_latency(substream
->latency_id
);
452 if ((usecs
= period_to_usecs(runtime
)) >= 0)
453 set_acceptable_latency(substream
->latency_id
, usecs
);
456 /* hardware might be unuseable from this time,
457 so we force application to retry to set
458 the correct hardware parameter settings */
459 runtime
->status
->state
= SNDRV_PCM_STATE_OPEN
;
460 if (substream
->ops
->hw_free
!= NULL
)
461 substream
->ops
->hw_free(substream
);
465 static int snd_pcm_hw_params_user(struct snd_pcm_substream
*substream
,
466 struct snd_pcm_hw_params __user
* _params
)
468 struct snd_pcm_hw_params
*params
;
471 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
476 if (copy_from_user(params
, _params
, sizeof(*params
))) {
480 err
= snd_pcm_hw_params(substream
, params
);
481 if (copy_to_user(_params
, params
, sizeof(*params
))) {
490 static int snd_pcm_hw_free(struct snd_pcm_substream
*substream
)
492 struct snd_pcm_runtime
*runtime
;
495 snd_assert(substream
!= NULL
, return -ENXIO
);
496 runtime
= substream
->runtime
;
497 snd_assert(runtime
!= NULL
, return -ENXIO
);
498 snd_pcm_stream_lock_irq(substream
);
499 switch (runtime
->status
->state
) {
500 case SNDRV_PCM_STATE_SETUP
:
501 case SNDRV_PCM_STATE_PREPARED
:
504 snd_pcm_stream_unlock_irq(substream
);
507 snd_pcm_stream_unlock_irq(substream
);
508 if (atomic_read(&substream
->mmap_count
))
510 if (substream
->ops
->hw_free
)
511 result
= substream
->ops
->hw_free(substream
);
512 runtime
->status
->state
= SNDRV_PCM_STATE_OPEN
;
513 remove_acceptable_latency(substream
->latency_id
);
517 static int snd_pcm_sw_params(struct snd_pcm_substream
*substream
,
518 struct snd_pcm_sw_params
*params
)
520 struct snd_pcm_runtime
*runtime
;
522 snd_assert(substream
!= NULL
, return -ENXIO
);
523 runtime
= substream
->runtime
;
524 snd_assert(runtime
!= NULL
, return -ENXIO
);
525 snd_pcm_stream_lock_irq(substream
);
526 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
527 snd_pcm_stream_unlock_irq(substream
);
530 snd_pcm_stream_unlock_irq(substream
);
532 if (params
->tstamp_mode
> SNDRV_PCM_TSTAMP_LAST
)
534 if (params
->avail_min
== 0)
536 if (params
->xfer_align
== 0 ||
537 params
->xfer_align
% runtime
->min_align
!= 0)
539 if (params
->silence_size
>= runtime
->boundary
) {
540 if (params
->silence_threshold
!= 0)
543 if (params
->silence_size
> params
->silence_threshold
)
545 if (params
->silence_threshold
> runtime
->buffer_size
)
548 snd_pcm_stream_lock_irq(substream
);
549 runtime
->tstamp_mode
= params
->tstamp_mode
;
550 runtime
->sleep_min
= params
->sleep_min
;
551 runtime
->period_step
= params
->period_step
;
552 runtime
->control
->avail_min
= params
->avail_min
;
553 runtime
->start_threshold
= params
->start_threshold
;
554 runtime
->stop_threshold
= params
->stop_threshold
;
555 runtime
->silence_threshold
= params
->silence_threshold
;
556 runtime
->silence_size
= params
->silence_size
;
557 runtime
->xfer_align
= params
->xfer_align
;
558 params
->boundary
= runtime
->boundary
;
559 if (snd_pcm_running(substream
)) {
560 if (runtime
->sleep_min
)
561 snd_pcm_tick_prepare(substream
);
563 snd_pcm_tick_set(substream
, 0);
564 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
565 runtime
->silence_size
> 0)
566 snd_pcm_playback_silence(substream
, ULONG_MAX
);
567 wake_up(&runtime
->sleep
);
569 snd_pcm_stream_unlock_irq(substream
);
573 static int snd_pcm_sw_params_user(struct snd_pcm_substream
*substream
,
574 struct snd_pcm_sw_params __user
* _params
)
576 struct snd_pcm_sw_params params
;
578 if (copy_from_user(¶ms
, _params
, sizeof(params
)))
580 err
= snd_pcm_sw_params(substream
, ¶ms
);
581 if (copy_to_user(_params
, ¶ms
, sizeof(params
)))
586 int snd_pcm_status(struct snd_pcm_substream
*substream
,
587 struct snd_pcm_status
*status
)
589 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
591 snd_pcm_stream_lock_irq(substream
);
592 status
->state
= runtime
->status
->state
;
593 status
->suspended_state
= runtime
->status
->suspended_state
;
594 if (status
->state
== SNDRV_PCM_STATE_OPEN
)
596 status
->trigger_tstamp
= runtime
->trigger_tstamp
;
597 if (snd_pcm_running(substream
)) {
598 snd_pcm_update_hw_ptr(substream
);
599 if (runtime
->tstamp_mode
& SNDRV_PCM_TSTAMP_MMAP
)
600 status
->tstamp
= runtime
->status
->tstamp
;
602 getnstimeofday(&status
->tstamp
);
604 getnstimeofday(&status
->tstamp
);
605 status
->appl_ptr
= runtime
->control
->appl_ptr
;
606 status
->hw_ptr
= runtime
->status
->hw_ptr
;
607 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
608 status
->avail
= snd_pcm_playback_avail(runtime
);
609 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
||
610 runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
)
611 status
->delay
= runtime
->buffer_size
- status
->avail
;
615 status
->avail
= snd_pcm_capture_avail(runtime
);
616 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
)
617 status
->delay
= status
->avail
;
621 status
->avail_max
= runtime
->avail_max
;
622 status
->overrange
= runtime
->overrange
;
623 runtime
->avail_max
= 0;
624 runtime
->overrange
= 0;
626 snd_pcm_stream_unlock_irq(substream
);
630 static int snd_pcm_status_user(struct snd_pcm_substream
*substream
,
631 struct snd_pcm_status __user
* _status
)
633 struct snd_pcm_status status
;
634 struct snd_pcm_runtime
*runtime
;
637 snd_assert(substream
!= NULL
, return -ENXIO
);
638 runtime
= substream
->runtime
;
639 memset(&status
, 0, sizeof(status
));
640 res
= snd_pcm_status(substream
, &status
);
643 if (copy_to_user(_status
, &status
, sizeof(status
)))
648 static int snd_pcm_channel_info(struct snd_pcm_substream
*substream
,
649 struct snd_pcm_channel_info
* info
)
651 struct snd_pcm_runtime
*runtime
;
652 unsigned int channel
;
654 snd_assert(substream
!= NULL
, return -ENXIO
);
655 channel
= info
->channel
;
656 runtime
= substream
->runtime
;
657 snd_pcm_stream_lock_irq(substream
);
658 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
659 snd_pcm_stream_unlock_irq(substream
);
662 snd_pcm_stream_unlock_irq(substream
);
663 if (channel
>= runtime
->channels
)
665 memset(info
, 0, sizeof(*info
));
666 info
->channel
= channel
;
667 return substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_CHANNEL_INFO
, info
);
670 static int snd_pcm_channel_info_user(struct snd_pcm_substream
*substream
,
671 struct snd_pcm_channel_info __user
* _info
)
673 struct snd_pcm_channel_info info
;
676 if (copy_from_user(&info
, _info
, sizeof(info
)))
678 res
= snd_pcm_channel_info(substream
, &info
);
681 if (copy_to_user(_info
, &info
, sizeof(info
)))
686 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream
*substream
)
688 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
689 if (runtime
->trigger_master
== NULL
)
691 if (runtime
->trigger_master
== substream
) {
692 getnstimeofday(&runtime
->trigger_tstamp
);
694 snd_pcm_trigger_tstamp(runtime
->trigger_master
);
695 runtime
->trigger_tstamp
= runtime
->trigger_master
->runtime
->trigger_tstamp
;
697 runtime
->trigger_master
= NULL
;
701 int (*pre_action
)(struct snd_pcm_substream
*substream
, int state
);
702 int (*do_action
)(struct snd_pcm_substream
*substream
, int state
);
703 void (*undo_action
)(struct snd_pcm_substream
*substream
, int state
);
704 void (*post_action
)(struct snd_pcm_substream
*substream
, int state
);
708 * this functions is core for handling of linked stream
709 * Note: the stream state might be changed also on failure
710 * Note2: call with calling stream lock + link lock
712 static int snd_pcm_action_group(struct action_ops
*ops
,
713 struct snd_pcm_substream
*substream
,
714 int state
, int do_lock
)
716 struct list_head
*pos
;
717 struct snd_pcm_substream
*s
= NULL
;
718 struct snd_pcm_substream
*s1
;
721 snd_pcm_group_for_each(pos
, substream
) {
722 s
= snd_pcm_group_substream_entry(pos
);
723 if (do_lock
&& s
!= substream
)
724 spin_lock(&s
->self_group
.lock
);
725 res
= ops
->pre_action(s
, state
);
729 snd_pcm_group_for_each(pos
, substream
) {
730 s
= snd_pcm_group_substream_entry(pos
);
731 res
= ops
->do_action(s
, state
);
733 if (ops
->undo_action
) {
734 snd_pcm_group_for_each(pos
, substream
) {
735 s1
= snd_pcm_group_substream_entry(pos
);
736 if (s1
== s
) /* failed stream */
738 ops
->undo_action(s1
, state
);
741 s
= NULL
; /* unlock all */
745 snd_pcm_group_for_each(pos
, substream
) {
746 s
= snd_pcm_group_substream_entry(pos
);
747 ops
->post_action(s
, state
);
752 snd_pcm_group_for_each(pos
, substream
) {
753 s1
= snd_pcm_group_substream_entry(pos
);
755 spin_unlock(&s1
->self_group
.lock
);
756 if (s1
== s
) /* end */
764 * Note: call with stream lock
766 static int snd_pcm_action_single(struct action_ops
*ops
,
767 struct snd_pcm_substream
*substream
,
772 res
= ops
->pre_action(substream
, state
);
775 res
= ops
->do_action(substream
, state
);
777 ops
->post_action(substream
, state
);
778 else if (ops
->undo_action
)
779 ops
->undo_action(substream
, state
);
784 * Note: call with stream lock
786 static int snd_pcm_action(struct action_ops
*ops
,
787 struct snd_pcm_substream
*substream
,
792 if (snd_pcm_stream_linked(substream
)) {
793 if (!spin_trylock(&substream
->group
->lock
)) {
794 spin_unlock(&substream
->self_group
.lock
);
795 spin_lock(&substream
->group
->lock
);
796 spin_lock(&substream
->self_group
.lock
);
798 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
799 spin_unlock(&substream
->group
->lock
);
801 res
= snd_pcm_action_single(ops
, substream
, state
);
807 * Note: don't use any locks before
809 static int snd_pcm_action_lock_irq(struct action_ops
*ops
,
810 struct snd_pcm_substream
*substream
,
815 read_lock_irq(&snd_pcm_link_rwlock
);
816 if (snd_pcm_stream_linked(substream
)) {
817 spin_lock(&substream
->group
->lock
);
818 spin_lock(&substream
->self_group
.lock
);
819 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
820 spin_unlock(&substream
->self_group
.lock
);
821 spin_unlock(&substream
->group
->lock
);
823 spin_lock(&substream
->self_group
.lock
);
824 res
= snd_pcm_action_single(ops
, substream
, state
);
825 spin_unlock(&substream
->self_group
.lock
);
827 read_unlock_irq(&snd_pcm_link_rwlock
);
833 static int snd_pcm_action_nonatomic(struct action_ops
*ops
,
834 struct snd_pcm_substream
*substream
,
839 down_read(&snd_pcm_link_rwsem
);
840 if (snd_pcm_stream_linked(substream
))
841 res
= snd_pcm_action_group(ops
, substream
, state
, 0);
843 res
= snd_pcm_action_single(ops
, substream
, state
);
844 up_read(&snd_pcm_link_rwsem
);
851 static int snd_pcm_pre_start(struct snd_pcm_substream
*substream
, int state
)
853 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
854 if (runtime
->status
->state
!= SNDRV_PCM_STATE_PREPARED
)
856 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
857 !snd_pcm_playback_data(substream
))
859 runtime
->trigger_master
= substream
;
863 static int snd_pcm_do_start(struct snd_pcm_substream
*substream
, int state
)
865 if (substream
->runtime
->trigger_master
!= substream
)
867 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_START
);
870 static void snd_pcm_undo_start(struct snd_pcm_substream
*substream
, int state
)
872 if (substream
->runtime
->trigger_master
== substream
)
873 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
876 static void snd_pcm_post_start(struct snd_pcm_substream
*substream
, int state
)
878 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
879 snd_pcm_trigger_tstamp(substream
);
880 runtime
->status
->state
= state
;
881 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
882 runtime
->silence_size
> 0)
883 snd_pcm_playback_silence(substream
, ULONG_MAX
);
884 if (runtime
->sleep_min
)
885 snd_pcm_tick_prepare(substream
);
886 if (substream
->timer
)
887 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTART
,
888 &runtime
->trigger_tstamp
);
891 static struct action_ops snd_pcm_action_start
= {
892 .pre_action
= snd_pcm_pre_start
,
893 .do_action
= snd_pcm_do_start
,
894 .undo_action
= snd_pcm_undo_start
,
895 .post_action
= snd_pcm_post_start
900 * @substream: the PCM substream instance
902 * Start all linked streams.
904 int snd_pcm_start(struct snd_pcm_substream
*substream
)
906 return snd_pcm_action(&snd_pcm_action_start
, substream
,
907 SNDRV_PCM_STATE_RUNNING
);
913 static int snd_pcm_pre_stop(struct snd_pcm_substream
*substream
, int state
)
915 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
916 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
918 runtime
->trigger_master
= substream
;
922 static int snd_pcm_do_stop(struct snd_pcm_substream
*substream
, int state
)
924 if (substream
->runtime
->trigger_master
== substream
&&
925 snd_pcm_running(substream
))
926 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
927 return 0; /* unconditonally stop all substreams */
930 static void snd_pcm_post_stop(struct snd_pcm_substream
*substream
, int state
)
932 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
933 if (runtime
->status
->state
!= state
) {
934 snd_pcm_trigger_tstamp(substream
);
935 if (substream
->timer
)
936 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTOP
,
937 &runtime
->trigger_tstamp
);
938 runtime
->status
->state
= state
;
939 snd_pcm_tick_set(substream
, 0);
941 wake_up(&runtime
->sleep
);
944 static struct action_ops snd_pcm_action_stop
= {
945 .pre_action
= snd_pcm_pre_stop
,
946 .do_action
= snd_pcm_do_stop
,
947 .post_action
= snd_pcm_post_stop
952 * @substream: the PCM substream instance
953 * @state: PCM state after stopping the stream
955 * Try to stop all running streams in the substream group.
956 * The state of each stream is changed to the given value after that unconditionally.
958 int snd_pcm_stop(struct snd_pcm_substream
*substream
, int state
)
960 return snd_pcm_action(&snd_pcm_action_stop
, substream
, state
);
963 EXPORT_SYMBOL(snd_pcm_stop
);
967 * @substream: the PCM substream
969 * Stop the DMA only when the given stream is playback.
970 * The state is changed to SETUP.
971 * Unlike snd_pcm_stop(), this affects only the given stream.
973 int snd_pcm_drain_done(struct snd_pcm_substream
*substream
)
975 return snd_pcm_action_single(&snd_pcm_action_stop
, substream
,
976 SNDRV_PCM_STATE_SETUP
);
982 static int snd_pcm_pre_pause(struct snd_pcm_substream
*substream
, int push
)
984 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
985 if (!(runtime
->info
& SNDRV_PCM_INFO_PAUSE
))
988 if (runtime
->status
->state
!= SNDRV_PCM_STATE_RUNNING
)
990 } else if (runtime
->status
->state
!= SNDRV_PCM_STATE_PAUSED
)
992 runtime
->trigger_master
= substream
;
996 static int snd_pcm_do_pause(struct snd_pcm_substream
*substream
, int push
)
998 if (substream
->runtime
->trigger_master
!= substream
)
1000 return substream
->ops
->trigger(substream
,
1001 push
? SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
1002 SNDRV_PCM_TRIGGER_PAUSE_RELEASE
);
1005 static void snd_pcm_undo_pause(struct snd_pcm_substream
*substream
, int push
)
1007 if (substream
->runtime
->trigger_master
== substream
)
1008 substream
->ops
->trigger(substream
,
1009 push
? SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1010 SNDRV_PCM_TRIGGER_PAUSE_PUSH
);
1013 static void snd_pcm_post_pause(struct snd_pcm_substream
*substream
, int push
)
1015 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1016 snd_pcm_trigger_tstamp(substream
);
1018 runtime
->status
->state
= SNDRV_PCM_STATE_PAUSED
;
1019 if (substream
->timer
)
1020 snd_timer_notify(substream
->timer
,
1021 SNDRV_TIMER_EVENT_MPAUSE
,
1022 &runtime
->trigger_tstamp
);
1023 snd_pcm_tick_set(substream
, 0);
1024 wake_up(&runtime
->sleep
);
1026 runtime
->status
->state
= SNDRV_PCM_STATE_RUNNING
;
1027 if (runtime
->sleep_min
)
1028 snd_pcm_tick_prepare(substream
);
1029 if (substream
->timer
)
1030 snd_timer_notify(substream
->timer
,
1031 SNDRV_TIMER_EVENT_MCONTINUE
,
1032 &runtime
->trigger_tstamp
);
1036 static struct action_ops snd_pcm_action_pause
= {
1037 .pre_action
= snd_pcm_pre_pause
,
1038 .do_action
= snd_pcm_do_pause
,
1039 .undo_action
= snd_pcm_undo_pause
,
1040 .post_action
= snd_pcm_post_pause
1044 * Push/release the pause for all linked streams.
1046 static int snd_pcm_pause(struct snd_pcm_substream
*substream
, int push
)
1048 return snd_pcm_action(&snd_pcm_action_pause
, substream
, push
);
1054 static int snd_pcm_pre_suspend(struct snd_pcm_substream
*substream
, int state
)
1056 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1057 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1059 runtime
->trigger_master
= substream
;
1063 static int snd_pcm_do_suspend(struct snd_pcm_substream
*substream
, int state
)
1065 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1066 if (runtime
->trigger_master
!= substream
)
1068 if (! snd_pcm_running(substream
))
1070 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1071 return 0; /* suspend unconditionally */
1074 static void snd_pcm_post_suspend(struct snd_pcm_substream
*substream
, int state
)
1076 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1077 snd_pcm_trigger_tstamp(substream
);
1078 if (substream
->timer
)
1079 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSUSPEND
,
1080 &runtime
->trigger_tstamp
);
1081 runtime
->status
->suspended_state
= runtime
->status
->state
;
1082 runtime
->status
->state
= SNDRV_PCM_STATE_SUSPENDED
;
1083 snd_pcm_tick_set(substream
, 0);
1084 wake_up(&runtime
->sleep
);
1087 static struct action_ops snd_pcm_action_suspend
= {
1088 .pre_action
= snd_pcm_pre_suspend
,
1089 .do_action
= snd_pcm_do_suspend
,
1090 .post_action
= snd_pcm_post_suspend
1095 * @substream: the PCM substream
1097 * Trigger SUSPEND to all linked streams.
1098 * After this call, all streams are changed to SUSPENDED state.
1100 int snd_pcm_suspend(struct snd_pcm_substream
*substream
)
1103 unsigned long flags
;
1108 snd_pcm_stream_lock_irqsave(substream
, flags
);
1109 err
= snd_pcm_action(&snd_pcm_action_suspend
, substream
, 0);
1110 snd_pcm_stream_unlock_irqrestore(substream
, flags
);
1114 EXPORT_SYMBOL(snd_pcm_suspend
);
1117 * snd_pcm_suspend_all
1118 * @pcm: the PCM instance
1120 * Trigger SUSPEND to all substreams in the given pcm.
1121 * After this call, all streams are changed to SUSPENDED state.
1123 int snd_pcm_suspend_all(struct snd_pcm
*pcm
)
1125 struct snd_pcm_substream
*substream
;
1126 int stream
, err
= 0;
1131 for (stream
= 0; stream
< 2; stream
++) {
1132 for (substream
= pcm
->streams
[stream
].substream
;
1133 substream
; substream
= substream
->next
) {
1134 /* FIXME: the open/close code should lock this as well */
1135 if (substream
->runtime
== NULL
)
1137 err
= snd_pcm_suspend(substream
);
1138 if (err
< 0 && err
!= -EBUSY
)
1145 EXPORT_SYMBOL(snd_pcm_suspend_all
);
1149 static int snd_pcm_pre_resume(struct snd_pcm_substream
*substream
, int state
)
1151 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1152 if (!(runtime
->info
& SNDRV_PCM_INFO_RESUME
))
1154 runtime
->trigger_master
= substream
;
1158 static int snd_pcm_do_resume(struct snd_pcm_substream
*substream
, int state
)
1160 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1161 if (runtime
->trigger_master
!= substream
)
1163 /* DMA not running previously? */
1164 if (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_RUNNING
&&
1165 (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_DRAINING
||
1166 substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
1168 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_RESUME
);
1171 static void snd_pcm_undo_resume(struct snd_pcm_substream
*substream
, int state
)
1173 if (substream
->runtime
->trigger_master
== substream
&&
1174 snd_pcm_running(substream
))
1175 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1178 static void snd_pcm_post_resume(struct snd_pcm_substream
*substream
, int state
)
1180 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1181 snd_pcm_trigger_tstamp(substream
);
1182 if (substream
->timer
)
1183 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MRESUME
,
1184 &runtime
->trigger_tstamp
);
1185 runtime
->status
->state
= runtime
->status
->suspended_state
;
1186 if (runtime
->sleep_min
)
1187 snd_pcm_tick_prepare(substream
);
1190 static struct action_ops snd_pcm_action_resume
= {
1191 .pre_action
= snd_pcm_pre_resume
,
1192 .do_action
= snd_pcm_do_resume
,
1193 .undo_action
= snd_pcm_undo_resume
,
1194 .post_action
= snd_pcm_post_resume
1197 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1199 struct snd_card
*card
= substream
->pcm
->card
;
1202 snd_power_lock(card
);
1203 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1204 res
= snd_pcm_action_lock_irq(&snd_pcm_action_resume
, substream
, 0);
1205 snd_power_unlock(card
);
1211 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1216 #endif /* CONFIG_PM */
1221 * Change the RUNNING stream(s) to XRUN state.
1223 static int snd_pcm_xrun(struct snd_pcm_substream
*substream
)
1225 struct snd_card
*card
= substream
->pcm
->card
;
1226 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1229 snd_power_lock(card
);
1230 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1231 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1236 snd_pcm_stream_lock_irq(substream
);
1237 switch (runtime
->status
->state
) {
1238 case SNDRV_PCM_STATE_XRUN
:
1239 result
= 0; /* already there */
1241 case SNDRV_PCM_STATE_RUNNING
:
1242 result
= snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
1247 snd_pcm_stream_unlock_irq(substream
);
1249 snd_power_unlock(card
);
1256 static int snd_pcm_pre_reset(struct snd_pcm_substream
*substream
, int state
)
1258 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1259 switch (runtime
->status
->state
) {
1260 case SNDRV_PCM_STATE_RUNNING
:
1261 case SNDRV_PCM_STATE_PREPARED
:
1262 case SNDRV_PCM_STATE_PAUSED
:
1263 case SNDRV_PCM_STATE_SUSPENDED
:
1270 static int snd_pcm_do_reset(struct snd_pcm_substream
*substream
, int state
)
1272 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1273 int err
= substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_RESET
, NULL
);
1276 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1277 runtime
->hw_ptr_base
= 0;
1278 runtime
->hw_ptr_interrupt
= runtime
->status
->hw_ptr
-
1279 runtime
->status
->hw_ptr
% runtime
->period_size
;
1280 runtime
->silence_start
= runtime
->status
->hw_ptr
;
1281 runtime
->silence_filled
= 0;
1285 static void snd_pcm_post_reset(struct snd_pcm_substream
*substream
, int state
)
1287 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1288 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1289 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
1290 runtime
->silence_size
> 0)
1291 snd_pcm_playback_silence(substream
, ULONG_MAX
);
1294 static struct action_ops snd_pcm_action_reset
= {
1295 .pre_action
= snd_pcm_pre_reset
,
1296 .do_action
= snd_pcm_do_reset
,
1297 .post_action
= snd_pcm_post_reset
1300 static int snd_pcm_reset(struct snd_pcm_substream
*substream
)
1302 return snd_pcm_action_nonatomic(&snd_pcm_action_reset
, substream
, 0);
1308 /* we use the second argument for updating f_flags */
1309 static int snd_pcm_pre_prepare(struct snd_pcm_substream
*substream
,
1312 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1313 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1315 if (snd_pcm_running(substream
))
1317 substream
->f_flags
= f_flags
;
1321 static int snd_pcm_do_prepare(struct snd_pcm_substream
*substream
, int state
)
1324 err
= substream
->ops
->prepare(substream
);
1327 return snd_pcm_do_reset(substream
, 0);
1330 static void snd_pcm_post_prepare(struct snd_pcm_substream
*substream
, int state
)
1332 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1333 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1334 runtime
->status
->state
= SNDRV_PCM_STATE_PREPARED
;
1337 static struct action_ops snd_pcm_action_prepare
= {
1338 .pre_action
= snd_pcm_pre_prepare
,
1339 .do_action
= snd_pcm_do_prepare
,
1340 .post_action
= snd_pcm_post_prepare
1345 * @substream: the PCM substream instance
1346 * @file: file to refer f_flags
1348 * Prepare the PCM substream to be triggerable.
1350 static int snd_pcm_prepare(struct snd_pcm_substream
*substream
,
1354 struct snd_card
*card
= substream
->pcm
->card
;
1358 f_flags
= file
->f_flags
;
1360 f_flags
= substream
->f_flags
;
1362 snd_power_lock(card
);
1363 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1364 res
= snd_pcm_action_nonatomic(&snd_pcm_action_prepare
,
1365 substream
, f_flags
);
1366 snd_power_unlock(card
);
1374 static int snd_pcm_pre_drain_init(struct snd_pcm_substream
*substream
, int state
)
1376 if (substream
->f_flags
& O_NONBLOCK
)
1378 substream
->runtime
->trigger_master
= substream
;
1382 static int snd_pcm_do_drain_init(struct snd_pcm_substream
*substream
, int state
)
1384 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1385 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
1386 switch (runtime
->status
->state
) {
1387 case SNDRV_PCM_STATE_PREPARED
:
1388 /* start playback stream if possible */
1389 if (! snd_pcm_playback_empty(substream
)) {
1390 snd_pcm_do_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1391 snd_pcm_post_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1394 case SNDRV_PCM_STATE_RUNNING
:
1395 runtime
->status
->state
= SNDRV_PCM_STATE_DRAINING
;
1401 /* stop running stream */
1402 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
) {
1403 int state
= snd_pcm_capture_avail(runtime
) > 0 ?
1404 SNDRV_PCM_STATE_DRAINING
: SNDRV_PCM_STATE_SETUP
;
1405 snd_pcm_do_stop(substream
, state
);
1406 snd_pcm_post_stop(substream
, state
);
1412 static void snd_pcm_post_drain_init(struct snd_pcm_substream
*substream
, int state
)
1416 static struct action_ops snd_pcm_action_drain_init
= {
1417 .pre_action
= snd_pcm_pre_drain_init
,
1418 .do_action
= snd_pcm_do_drain_init
,
1419 .post_action
= snd_pcm_post_drain_init
1423 struct snd_pcm_substream
*substream
;
1425 snd_pcm_uframes_t stop_threshold
;
1428 static int snd_pcm_drop(struct snd_pcm_substream
*substream
);
1431 * Drain the stream(s).
1432 * When the substream is linked, sync until the draining of all playback streams
1434 * After this call, all streams are supposed to be either SETUP or DRAINING
1435 * (capture only) state.
1437 static int snd_pcm_drain(struct snd_pcm_substream
*substream
)
1439 struct snd_card
*card
;
1440 struct snd_pcm_runtime
*runtime
;
1441 struct list_head
*pos
;
1444 struct drain_rec
*drec
, drec_tmp
, *d
;
1446 snd_assert(substream
!= NULL
, return -ENXIO
);
1447 card
= substream
->pcm
->card
;
1448 runtime
= substream
->runtime
;
1450 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1453 snd_power_lock(card
);
1454 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1455 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1457 snd_power_unlock(card
);
1462 /* allocate temporary record for drain sync */
1463 down_read(&snd_pcm_link_rwsem
);
1464 if (snd_pcm_stream_linked(substream
)) {
1465 drec
= kmalloc(substream
->group
->count
* sizeof(*drec
), GFP_KERNEL
);
1467 up_read(&snd_pcm_link_rwsem
);
1468 snd_power_unlock(card
);
1474 /* count only playback streams */
1476 snd_pcm_group_for_each(pos
, substream
) {
1477 struct snd_pcm_substream
*s
= snd_pcm_group_substream_entry(pos
);
1478 runtime
= s
->runtime
;
1479 if (s
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
1480 d
= &drec
[num_drecs
++];
1482 init_waitqueue_entry(&d
->wait
, current
);
1483 add_wait_queue(&runtime
->sleep
, &d
->wait
);
1484 /* stop_threshold fixup to avoid endless loop when
1485 * stop_threshold > buffer_size
1487 d
->stop_threshold
= runtime
->stop_threshold
;
1488 if (runtime
->stop_threshold
> runtime
->buffer_size
)
1489 runtime
->stop_threshold
= runtime
->buffer_size
;
1492 up_read(&snd_pcm_link_rwsem
);
1494 snd_pcm_stream_lock_irq(substream
);
1496 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1497 snd_pcm_pause(substream
, 0);
1499 /* pre-start/stop - all running streams are changed to DRAINING state */
1500 result
= snd_pcm_action(&snd_pcm_action_drain_init
, substream
, 0);
1502 snd_pcm_stream_unlock_irq(substream
);
1508 if (signal_pending(current
)) {
1509 result
= -ERESTARTSYS
;
1513 for (i
= 0; i
< num_drecs
; i
++) {
1514 runtime
= drec
[i
].substream
->runtime
;
1515 if (runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
)
1519 break; /* yes, all drained */
1521 set_current_state(TASK_INTERRUPTIBLE
);
1522 snd_pcm_stream_unlock_irq(substream
);
1523 snd_power_unlock(card
);
1524 tout
= schedule_timeout(10 * HZ
);
1525 snd_power_lock(card
);
1526 snd_pcm_stream_lock_irq(substream
);
1528 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1531 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1532 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1539 snd_pcm_stream_unlock_irq(substream
);
1542 for (i
= 0; i
< num_drecs
; i
++) {
1544 runtime
= d
->substream
->runtime
;
1545 remove_wait_queue(&runtime
->sleep
, &d
->wait
);
1546 runtime
->stop_threshold
= d
->stop_threshold
;
1549 if (drec
!= &drec_tmp
)
1551 snd_power_unlock(card
);
1559 * Immediately put all linked substreams into SETUP state.
1561 static int snd_pcm_drop(struct snd_pcm_substream
*substream
)
1563 struct snd_pcm_runtime
*runtime
;
1564 struct snd_card
*card
;
1567 snd_assert(substream
!= NULL
, return -ENXIO
);
1568 runtime
= substream
->runtime
;
1569 card
= substream
->pcm
->card
;
1571 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1574 snd_power_lock(card
);
1575 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1576 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1581 snd_pcm_stream_lock_irq(substream
);
1583 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1584 snd_pcm_pause(substream
, 0);
1586 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1587 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1588 snd_pcm_stream_unlock_irq(substream
);
1590 snd_power_unlock(card
);
1595 /* WARNING: Don't forget to fput back the file */
1596 static struct file
*snd_pcm_file_fd(int fd
)
1599 struct inode
*inode
;
1605 inode
= file
->f_dentry
->d_inode
;
1606 if (!S_ISCHR(inode
->i_mode
) ||
1607 imajor(inode
) != snd_major
) {
1611 minor
= iminor(inode
);
1612 if (!snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_PLAYBACK
) &&
1613 !snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_CAPTURE
)) {
1623 static int snd_pcm_link(struct snd_pcm_substream
*substream
, int fd
)
1627 struct snd_pcm_file
*pcm_file
;
1628 struct snd_pcm_substream
*substream1
;
1630 file
= snd_pcm_file_fd(fd
);
1633 pcm_file
= file
->private_data
;
1634 substream1
= pcm_file
->substream
;
1635 down_write(&snd_pcm_link_rwsem
);
1636 write_lock_irq(&snd_pcm_link_rwlock
);
1637 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1638 substream
->runtime
->status
->state
!= substream1
->runtime
->status
->state
) {
1642 if (snd_pcm_stream_linked(substream1
)) {
1646 if (!snd_pcm_stream_linked(substream
)) {
1647 substream
->group
= kmalloc(sizeof(struct snd_pcm_group
), GFP_ATOMIC
);
1648 if (substream
->group
== NULL
) {
1652 spin_lock_init(&substream
->group
->lock
);
1653 INIT_LIST_HEAD(&substream
->group
->substreams
);
1654 list_add_tail(&substream
->link_list
, &substream
->group
->substreams
);
1655 substream
->group
->count
= 1;
1657 list_add_tail(&substream1
->link_list
, &substream
->group
->substreams
);
1658 substream
->group
->count
++;
1659 substream1
->group
= substream
->group
;
1661 write_unlock_irq(&snd_pcm_link_rwlock
);
1662 up_write(&snd_pcm_link_rwsem
);
1667 static void relink_to_local(struct snd_pcm_substream
*substream
)
1669 substream
->group
= &substream
->self_group
;
1670 INIT_LIST_HEAD(&substream
->self_group
.substreams
);
1671 list_add_tail(&substream
->link_list
, &substream
->self_group
.substreams
);
1674 static int snd_pcm_unlink(struct snd_pcm_substream
*substream
)
1676 struct list_head
*pos
;
1679 down_write(&snd_pcm_link_rwsem
);
1680 write_lock_irq(&snd_pcm_link_rwlock
);
1681 if (!snd_pcm_stream_linked(substream
)) {
1685 list_del(&substream
->link_list
);
1686 substream
->group
->count
--;
1687 if (substream
->group
->count
== 1) { /* detach the last stream, too */
1688 snd_pcm_group_for_each(pos
, substream
) {
1689 relink_to_local(snd_pcm_group_substream_entry(pos
));
1692 kfree(substream
->group
);
1694 relink_to_local(substream
);
1696 write_unlock_irq(&snd_pcm_link_rwlock
);
1697 up_write(&snd_pcm_link_rwsem
);
1704 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params
*params
,
1705 struct snd_pcm_hw_rule
*rule
)
1707 struct snd_interval t
;
1708 snd_interval_mul(hw_param_interval_c(params
, rule
->deps
[0]),
1709 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1710 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1713 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params
*params
,
1714 struct snd_pcm_hw_rule
*rule
)
1716 struct snd_interval t
;
1717 snd_interval_div(hw_param_interval_c(params
, rule
->deps
[0]),
1718 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1719 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1722 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params
*params
,
1723 struct snd_pcm_hw_rule
*rule
)
1725 struct snd_interval t
;
1726 snd_interval_muldivk(hw_param_interval_c(params
, rule
->deps
[0]),
1727 hw_param_interval_c(params
, rule
->deps
[1]),
1728 (unsigned long) rule
->private, &t
);
1729 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1732 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params
*params
,
1733 struct snd_pcm_hw_rule
*rule
)
1735 struct snd_interval t
;
1736 snd_interval_mulkdiv(hw_param_interval_c(params
, rule
->deps
[0]),
1737 (unsigned long) rule
->private,
1738 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1739 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1742 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params
*params
,
1743 struct snd_pcm_hw_rule
*rule
)
1746 struct snd_interval
*i
= hw_param_interval(params
, rule
->deps
[0]);
1748 struct snd_mask
*mask
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1750 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1752 if (! snd_mask_test(mask
, k
))
1754 bits
= snd_pcm_format_physical_width(k
);
1756 continue; /* ignore invalid formats */
1757 if ((unsigned)bits
< i
->min
|| (unsigned)bits
> i
->max
)
1758 snd_mask_reset(&m
, k
);
1760 return snd_mask_refine(mask
, &m
);
1763 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params
*params
,
1764 struct snd_pcm_hw_rule
*rule
)
1766 struct snd_interval t
;
1772 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1774 if (! snd_mask_test(hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
), k
))
1776 bits
= snd_pcm_format_physical_width(k
);
1778 continue; /* ignore invalid formats */
1779 if (t
.min
> (unsigned)bits
)
1781 if (t
.max
< (unsigned)bits
)
1785 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1788 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1789 #error "Change this table"
1792 static unsigned int rates
[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1793 48000, 64000, 88200, 96000, 176400, 192000 };
1795 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 ARRAY_SIZE(rates
), rates
, hw
->rates
);
1803 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params
*params
,
1804 struct snd_pcm_hw_rule
*rule
)
1806 struct snd_interval t
;
1807 struct snd_pcm_substream
*substream
= rule
->private;
1809 t
.max
= substream
->buffer_bytes_max
;
1813 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1816 int snd_pcm_hw_constraints_init(struct snd_pcm_substream
*substream
)
1818 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1819 struct snd_pcm_hw_constraints
*constrs
= &runtime
->hw_constraints
;
1822 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
1823 snd_mask_any(constrs_mask(constrs
, k
));
1826 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
1827 snd_interval_any(constrs_interval(constrs
, k
));
1830 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_CHANNELS
));
1831 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
));
1832 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
));
1833 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
));
1834 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_FRAME_BITS
));
1836 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1837 snd_pcm_hw_rule_format
, NULL
,
1838 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1841 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1842 snd_pcm_hw_rule_sample_bits
, NULL
,
1843 SNDRV_PCM_HW_PARAM_FORMAT
,
1844 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1847 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1848 snd_pcm_hw_rule_div
, NULL
,
1849 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1852 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1853 snd_pcm_hw_rule_mul
, NULL
,
1854 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1857 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1858 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1859 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1862 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1863 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1864 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, -1);
1867 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
1868 snd_pcm_hw_rule_div
, NULL
,
1869 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1872 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1873 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1874 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
, -1);
1877 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1878 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1879 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_BUFFER_TIME
, -1);
1882 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIODS
,
1883 snd_pcm_hw_rule_div
, NULL
,
1884 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1887 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1888 snd_pcm_hw_rule_div
, NULL
,
1889 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1892 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1893 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1894 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1897 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1898 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1899 SNDRV_PCM_HW_PARAM_PERIOD_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1902 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1903 snd_pcm_hw_rule_mul
, NULL
,
1904 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1907 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1908 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1909 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1912 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1913 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1914 SNDRV_PCM_HW_PARAM_BUFFER_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1917 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1918 snd_pcm_hw_rule_muldivk
, (void*) 8,
1919 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1922 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1923 snd_pcm_hw_rule_muldivk
, (void*) 8,
1924 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1927 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
1928 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1929 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1932 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME
,
1933 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1934 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1940 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream
*substream
)
1942 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1943 struct snd_pcm_hardware
*hw
= &runtime
->hw
;
1945 unsigned int mask
= 0;
1947 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1948 mask
|= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED
;
1949 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1950 mask
|= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
;
1951 if (hw
->info
& SNDRV_PCM_INFO_MMAP
) {
1952 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1953 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED
;
1954 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1955 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED
;
1956 if (hw
->info
& SNDRV_PCM_INFO_COMPLEX
)
1957 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX
;
1959 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_ACCESS
, mask
);
1960 snd_assert(err
>= 0, return -EINVAL
);
1962 err
= snd_pcm_hw_constraint_mask64(runtime
, SNDRV_PCM_HW_PARAM_FORMAT
, hw
->formats
);
1963 snd_assert(err
>= 0, return -EINVAL
);
1965 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_SUBFORMAT
, 1 << SNDRV_PCM_SUBFORMAT_STD
);
1966 snd_assert(err
>= 0, return -EINVAL
);
1968 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_CHANNELS
,
1969 hw
->channels_min
, hw
->channels_max
);
1970 snd_assert(err
>= 0, return -EINVAL
);
1972 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_RATE
,
1973 hw
->rate_min
, hw
->rate_max
);
1974 snd_assert(err
>= 0, return -EINVAL
);
1976 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1977 hw
->period_bytes_min
, hw
->period_bytes_max
);
1978 snd_assert(err
>= 0, return -EINVAL
);
1980 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIODS
,
1981 hw
->periods_min
, hw
->periods_max
);
1982 snd_assert(err
>= 0, return -EINVAL
);
1984 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1985 hw
->period_bytes_min
, hw
->buffer_bytes_max
);
1986 snd_assert(err
>= 0, return -EINVAL
);
1988 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1989 snd_pcm_hw_rule_buffer_bytes_max
, substream
,
1990 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, -1);
1995 if (runtime
->dma_bytes
) {
1996 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, 0, runtime
->dma_bytes
);
1997 snd_assert(err
>= 0, return -EINVAL
);
2000 if (!(hw
->rates
& (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))) {
2001 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
2002 snd_pcm_hw_rule_rate
, hw
,
2003 SNDRV_PCM_HW_PARAM_RATE
, -1);
2008 /* FIXME: this belong to lowlevel */
2009 snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_TICK_TIME
,
2010 1000000 / HZ
, 1000000 / HZ
);
2011 snd_pcm_hw_constraint_integer(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
);
2016 static void pcm_release_private(struct snd_pcm_substream
*substream
)
2018 snd_pcm_unlink(substream
);
2021 void snd_pcm_release_substream(struct snd_pcm_substream
*substream
)
2023 substream
->ref_count
--;
2024 if (substream
->ref_count
> 0)
2027 snd_pcm_drop(substream
);
2028 if (substream
->hw_opened
) {
2029 if (substream
->ops
->hw_free
!= NULL
)
2030 substream
->ops
->hw_free(substream
);
2031 substream
->ops
->close(substream
);
2032 substream
->hw_opened
= 0;
2034 if (substream
->pcm_release
) {
2035 substream
->pcm_release(substream
);
2036 substream
->pcm_release
= NULL
;
2038 snd_pcm_detach_substream(substream
);
2041 EXPORT_SYMBOL(snd_pcm_release_substream
);
2043 int snd_pcm_open_substream(struct snd_pcm
*pcm
, int stream
,
2045 struct snd_pcm_substream
**rsubstream
)
2047 struct snd_pcm_substream
*substream
;
2050 err
= snd_pcm_attach_substream(pcm
, stream
, file
, &substream
);
2053 if (substream
->ref_count
> 1) {
2054 *rsubstream
= substream
;
2058 err
= snd_pcm_hw_constraints_init(substream
);
2060 snd_printd("snd_pcm_hw_constraints_init failed\n");
2064 if ((err
= substream
->ops
->open(substream
)) < 0)
2067 substream
->hw_opened
= 1;
2069 err
= snd_pcm_hw_constraints_complete(substream
);
2071 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2075 *rsubstream
= substream
;
2079 snd_pcm_release_substream(substream
);
2083 EXPORT_SYMBOL(snd_pcm_open_substream
);
2085 static int snd_pcm_open_file(struct file
*file
,
2086 struct snd_pcm
*pcm
,
2088 struct snd_pcm_file
**rpcm_file
)
2090 struct snd_pcm_file
*pcm_file
;
2091 struct snd_pcm_substream
*substream
;
2092 struct snd_pcm_str
*str
;
2095 snd_assert(rpcm_file
!= NULL
, return -EINVAL
);
2098 err
= snd_pcm_open_substream(pcm
, stream
, file
, &substream
);
2102 pcm_file
= kzalloc(sizeof(*pcm_file
), GFP_KERNEL
);
2103 if (pcm_file
== NULL
) {
2104 snd_pcm_release_substream(substream
);
2107 pcm_file
->substream
= substream
;
2108 if (substream
->ref_count
== 1) {
2109 str
= substream
->pstr
;
2110 substream
->file
= pcm_file
;
2111 substream
->pcm_release
= pcm_release_private
;
2113 file
->private_data
= pcm_file
;
2114 *rpcm_file
= pcm_file
;
2118 static int snd_pcm_playback_open(struct inode
*inode
, struct file
*file
)
2120 struct snd_pcm
*pcm
;
2122 pcm
= snd_lookup_minor_data(iminor(inode
),
2123 SNDRV_DEVICE_TYPE_PCM_PLAYBACK
);
2124 return snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_PLAYBACK
);
2127 static int snd_pcm_capture_open(struct inode
*inode
, struct file
*file
)
2129 struct snd_pcm
*pcm
;
2131 pcm
= snd_lookup_minor_data(iminor(inode
),
2132 SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
2133 return snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_CAPTURE
);
2136 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
)
2139 struct snd_pcm_file
*pcm_file
;
2146 err
= snd_card_file_add(pcm
->card
, file
);
2149 if (!try_module_get(pcm
->card
->module
)) {
2153 init_waitqueue_entry(&wait
, current
);
2154 add_wait_queue(&pcm
->open_wait
, &wait
);
2155 mutex_lock(&pcm
->open_mutex
);
2157 err
= snd_pcm_open_file(file
, pcm
, stream
, &pcm_file
);
2160 if (err
== -EAGAIN
) {
2161 if (file
->f_flags
& O_NONBLOCK
) {
2167 set_current_state(TASK_INTERRUPTIBLE
);
2168 mutex_unlock(&pcm
->open_mutex
);
2170 mutex_lock(&pcm
->open_mutex
);
2171 if (signal_pending(current
)) {
2176 remove_wait_queue(&pcm
->open_wait
, &wait
);
2177 mutex_unlock(&pcm
->open_mutex
);
2183 module_put(pcm
->card
->module
);
2185 snd_card_file_remove(pcm
->card
, file
);
2190 static int snd_pcm_release(struct inode
*inode
, struct file
*file
)
2192 struct snd_pcm
*pcm
;
2193 struct snd_pcm_substream
*substream
;
2194 struct snd_pcm_file
*pcm_file
;
2196 pcm_file
= file
->private_data
;
2197 substream
= pcm_file
->substream
;
2198 snd_assert(substream
!= NULL
, return -ENXIO
);
2199 pcm
= substream
->pcm
;
2200 fasync_helper(-1, file
, 0, &substream
->runtime
->fasync
);
2201 mutex_lock(&pcm
->open_mutex
);
2202 snd_pcm_release_substream(substream
);
2204 mutex_unlock(&pcm
->open_mutex
);
2205 wake_up(&pcm
->open_wait
);
2206 module_put(pcm
->card
->module
);
2207 snd_card_file_remove(pcm
->card
, file
);
2211 static snd_pcm_sframes_t
snd_pcm_playback_rewind(struct snd_pcm_substream
*substream
,
2212 snd_pcm_uframes_t frames
)
2214 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2215 snd_pcm_sframes_t appl_ptr
;
2216 snd_pcm_sframes_t ret
;
2217 snd_pcm_sframes_t hw_avail
;
2222 snd_pcm_stream_lock_irq(substream
);
2223 switch (runtime
->status
->state
) {
2224 case SNDRV_PCM_STATE_PREPARED
:
2226 case SNDRV_PCM_STATE_DRAINING
:
2227 case SNDRV_PCM_STATE_RUNNING
:
2228 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2231 case SNDRV_PCM_STATE_XRUN
:
2239 hw_avail
= snd_pcm_playback_hw_avail(runtime
);
2240 if (hw_avail
<= 0) {
2244 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2247 frames
-= frames
% runtime
->xfer_align
;
2248 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2250 appl_ptr
+= runtime
->boundary
;
2251 runtime
->control
->appl_ptr
= appl_ptr
;
2252 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
&&
2254 snd_pcm_tick_prepare(substream
);
2257 snd_pcm_stream_unlock_irq(substream
);
2261 static snd_pcm_sframes_t
snd_pcm_capture_rewind(struct snd_pcm_substream
*substream
,
2262 snd_pcm_uframes_t frames
)
2264 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2265 snd_pcm_sframes_t appl_ptr
;
2266 snd_pcm_sframes_t ret
;
2267 snd_pcm_sframes_t hw_avail
;
2272 snd_pcm_stream_lock_irq(substream
);
2273 switch (runtime
->status
->state
) {
2274 case SNDRV_PCM_STATE_PREPARED
:
2275 case SNDRV_PCM_STATE_DRAINING
:
2277 case SNDRV_PCM_STATE_RUNNING
:
2278 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2281 case SNDRV_PCM_STATE_XRUN
:
2289 hw_avail
= snd_pcm_capture_hw_avail(runtime
);
2290 if (hw_avail
<= 0) {
2294 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2297 frames
-= frames
% runtime
->xfer_align
;
2298 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2300 appl_ptr
+= runtime
->boundary
;
2301 runtime
->control
->appl_ptr
= appl_ptr
;
2302 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
&&
2304 snd_pcm_tick_prepare(substream
);
2307 snd_pcm_stream_unlock_irq(substream
);
2311 static snd_pcm_sframes_t
snd_pcm_playback_forward(struct snd_pcm_substream
*substream
,
2312 snd_pcm_uframes_t frames
)
2314 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2315 snd_pcm_sframes_t appl_ptr
;
2316 snd_pcm_sframes_t ret
;
2317 snd_pcm_sframes_t avail
;
2322 snd_pcm_stream_lock_irq(substream
);
2323 switch (runtime
->status
->state
) {
2324 case SNDRV_PCM_STATE_PREPARED
:
2325 case SNDRV_PCM_STATE_PAUSED
:
2327 case SNDRV_PCM_STATE_DRAINING
:
2328 case SNDRV_PCM_STATE_RUNNING
:
2329 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2332 case SNDRV_PCM_STATE_XRUN
:
2340 avail
= snd_pcm_playback_avail(runtime
);
2345 if (frames
> (snd_pcm_uframes_t
)avail
)
2348 frames
-= frames
% runtime
->xfer_align
;
2349 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2350 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2351 appl_ptr
-= runtime
->boundary
;
2352 runtime
->control
->appl_ptr
= appl_ptr
;
2353 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
&&
2355 snd_pcm_tick_prepare(substream
);
2358 snd_pcm_stream_unlock_irq(substream
);
2362 static snd_pcm_sframes_t
snd_pcm_capture_forward(struct snd_pcm_substream
*substream
,
2363 snd_pcm_uframes_t frames
)
2365 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2366 snd_pcm_sframes_t appl_ptr
;
2367 snd_pcm_sframes_t ret
;
2368 snd_pcm_sframes_t avail
;
2373 snd_pcm_stream_lock_irq(substream
);
2374 switch (runtime
->status
->state
) {
2375 case SNDRV_PCM_STATE_PREPARED
:
2376 case SNDRV_PCM_STATE_DRAINING
:
2377 case SNDRV_PCM_STATE_PAUSED
:
2379 case SNDRV_PCM_STATE_RUNNING
:
2380 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2383 case SNDRV_PCM_STATE_XRUN
:
2391 avail
= snd_pcm_capture_avail(runtime
);
2396 if (frames
> (snd_pcm_uframes_t
)avail
)
2399 frames
-= frames
% runtime
->xfer_align
;
2400 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2401 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2402 appl_ptr
-= runtime
->boundary
;
2403 runtime
->control
->appl_ptr
= appl_ptr
;
2404 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
&&
2406 snd_pcm_tick_prepare(substream
);
2409 snd_pcm_stream_unlock_irq(substream
);
2413 static int snd_pcm_hwsync(struct snd_pcm_substream
*substream
)
2415 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2418 snd_pcm_stream_lock_irq(substream
);
2419 switch (runtime
->status
->state
) {
2420 case SNDRV_PCM_STATE_DRAINING
:
2421 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2423 case SNDRV_PCM_STATE_RUNNING
:
2424 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2427 case SNDRV_PCM_STATE_PREPARED
:
2428 case SNDRV_PCM_STATE_SUSPENDED
:
2431 case SNDRV_PCM_STATE_XRUN
:
2439 snd_pcm_stream_unlock_irq(substream
);
2443 static int snd_pcm_delay(struct snd_pcm_substream
*substream
,
2444 snd_pcm_sframes_t __user
*res
)
2446 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2448 snd_pcm_sframes_t n
= 0;
2450 snd_pcm_stream_lock_irq(substream
);
2451 switch (runtime
->status
->state
) {
2452 case SNDRV_PCM_STATE_DRAINING
:
2453 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2455 case SNDRV_PCM_STATE_RUNNING
:
2456 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2459 case SNDRV_PCM_STATE_PREPARED
:
2460 case SNDRV_PCM_STATE_SUSPENDED
:
2462 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2463 n
= snd_pcm_playback_hw_avail(runtime
);
2465 n
= snd_pcm_capture_avail(runtime
);
2467 case SNDRV_PCM_STATE_XRUN
:
2475 snd_pcm_stream_unlock_irq(substream
);
2477 if (put_user(n
, res
))
2482 static int snd_pcm_sync_ptr(struct snd_pcm_substream
*substream
,
2483 struct snd_pcm_sync_ptr __user
*_sync_ptr
)
2485 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2486 struct snd_pcm_sync_ptr sync_ptr
;
2487 volatile struct snd_pcm_mmap_status
*status
;
2488 volatile struct snd_pcm_mmap_control
*control
;
2491 memset(&sync_ptr
, 0, sizeof(sync_ptr
));
2492 if (get_user(sync_ptr
.flags
, (unsigned __user
*)&(_sync_ptr
->flags
)))
2494 if (copy_from_user(&sync_ptr
.c
.control
, &(_sync_ptr
->c
.control
), sizeof(struct snd_pcm_mmap_control
)))
2496 status
= runtime
->status
;
2497 control
= runtime
->control
;
2498 if (sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_HWSYNC
) {
2499 err
= snd_pcm_hwsync(substream
);
2503 snd_pcm_stream_lock_irq(substream
);
2504 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_APPL
))
2505 control
->appl_ptr
= sync_ptr
.c
.control
.appl_ptr
;
2507 sync_ptr
.c
.control
.appl_ptr
= control
->appl_ptr
;
2508 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_AVAIL_MIN
))
2509 control
->avail_min
= sync_ptr
.c
.control
.avail_min
;
2511 sync_ptr
.c
.control
.avail_min
= control
->avail_min
;
2512 sync_ptr
.s
.status
.state
= status
->state
;
2513 sync_ptr
.s
.status
.hw_ptr
= status
->hw_ptr
;
2514 sync_ptr
.s
.status
.tstamp
= status
->tstamp
;
2515 sync_ptr
.s
.status
.suspended_state
= status
->suspended_state
;
2516 snd_pcm_stream_unlock_irq(substream
);
2517 if (copy_to_user(_sync_ptr
, &sync_ptr
, sizeof(sync_ptr
)))
2522 static int snd_pcm_common_ioctl1(struct file
*file
,
2523 struct snd_pcm_substream
*substream
,
2524 unsigned int cmd
, void __user
*arg
)
2526 snd_assert(substream
!= NULL
, return -ENXIO
);
2529 case SNDRV_PCM_IOCTL_PVERSION
:
2530 return put_user(SNDRV_PCM_VERSION
, (int __user
*)arg
) ? -EFAULT
: 0;
2531 case SNDRV_PCM_IOCTL_INFO
:
2532 return snd_pcm_info_user(substream
, arg
);
2533 case SNDRV_PCM_IOCTL_TSTAMP
: /* just for compatibility */
2535 case SNDRV_PCM_IOCTL_HW_REFINE
:
2536 return snd_pcm_hw_refine_user(substream
, arg
);
2537 case SNDRV_PCM_IOCTL_HW_PARAMS
:
2538 return snd_pcm_hw_params_user(substream
, arg
);
2539 case SNDRV_PCM_IOCTL_HW_FREE
:
2540 return snd_pcm_hw_free(substream
);
2541 case SNDRV_PCM_IOCTL_SW_PARAMS
:
2542 return snd_pcm_sw_params_user(substream
, arg
);
2543 case SNDRV_PCM_IOCTL_STATUS
:
2544 return snd_pcm_status_user(substream
, arg
);
2545 case SNDRV_PCM_IOCTL_CHANNEL_INFO
:
2546 return snd_pcm_channel_info_user(substream
, arg
);
2547 case SNDRV_PCM_IOCTL_PREPARE
:
2548 return snd_pcm_prepare(substream
, file
);
2549 case SNDRV_PCM_IOCTL_RESET
:
2550 return snd_pcm_reset(substream
);
2551 case SNDRV_PCM_IOCTL_START
:
2552 return snd_pcm_action_lock_irq(&snd_pcm_action_start
, substream
, SNDRV_PCM_STATE_RUNNING
);
2553 case SNDRV_PCM_IOCTL_LINK
:
2554 return snd_pcm_link(substream
, (int)(unsigned long) arg
);
2555 case SNDRV_PCM_IOCTL_UNLINK
:
2556 return snd_pcm_unlink(substream
);
2557 case SNDRV_PCM_IOCTL_RESUME
:
2558 return snd_pcm_resume(substream
);
2559 case SNDRV_PCM_IOCTL_XRUN
:
2560 return snd_pcm_xrun(substream
);
2561 case SNDRV_PCM_IOCTL_HWSYNC
:
2562 return snd_pcm_hwsync(substream
);
2563 case SNDRV_PCM_IOCTL_DELAY
:
2564 return snd_pcm_delay(substream
, arg
);
2565 case SNDRV_PCM_IOCTL_SYNC_PTR
:
2566 return snd_pcm_sync_ptr(substream
, arg
);
2567 #ifdef CONFIG_SND_SUPPORT_OLD_API
2568 case SNDRV_PCM_IOCTL_HW_REFINE_OLD
:
2569 return snd_pcm_hw_refine_old_user(substream
, arg
);
2570 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD
:
2571 return snd_pcm_hw_params_old_user(substream
, arg
);
2573 case SNDRV_PCM_IOCTL_DRAIN
:
2574 return snd_pcm_drain(substream
);
2575 case SNDRV_PCM_IOCTL_DROP
:
2576 return snd_pcm_drop(substream
);
2577 case SNDRV_PCM_IOCTL_PAUSE
:
2580 snd_pcm_stream_lock_irq(substream
);
2581 res
= snd_pcm_pause(substream
, (int)(unsigned long)arg
);
2582 snd_pcm_stream_unlock_irq(substream
);
2586 snd_printd("unknown ioctl = 0x%x\n", cmd
);
2590 static int snd_pcm_playback_ioctl1(struct file
*file
,
2591 struct snd_pcm_substream
*substream
,
2592 unsigned int cmd
, void __user
*arg
)
2594 snd_assert(substream
!= NULL
, return -ENXIO
);
2595 snd_assert(substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
, return -EINVAL
);
2597 case SNDRV_PCM_IOCTL_WRITEI_FRAMES
:
2599 struct snd_xferi xferi
;
2600 struct snd_xferi __user
*_xferi
= arg
;
2601 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2602 snd_pcm_sframes_t result
;
2603 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2605 if (put_user(0, &_xferi
->result
))
2607 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2609 result
= snd_pcm_lib_write(substream
, xferi
.buf
, xferi
.frames
);
2610 __put_user(result
, &_xferi
->result
);
2611 return result
< 0 ? result
: 0;
2613 case SNDRV_PCM_IOCTL_WRITEN_FRAMES
:
2615 struct snd_xfern xfern
;
2616 struct snd_xfern __user
*_xfern
= arg
;
2617 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2619 snd_pcm_sframes_t result
;
2620 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2622 if (runtime
->channels
> 128)
2624 if (put_user(0, &_xfern
->result
))
2626 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2628 bufs
= kmalloc(sizeof(void *) * runtime
->channels
, GFP_KERNEL
);
2631 if (copy_from_user(bufs
, xfern
.bufs
, sizeof(void *) * runtime
->channels
)) {
2635 result
= snd_pcm_lib_writev(substream
, bufs
, xfern
.frames
);
2637 __put_user(result
, &_xfern
->result
);
2638 return result
< 0 ? result
: 0;
2640 case SNDRV_PCM_IOCTL_REWIND
:
2642 snd_pcm_uframes_t frames
;
2643 snd_pcm_uframes_t __user
*_frames
= arg
;
2644 snd_pcm_sframes_t result
;
2645 if (get_user(frames
, _frames
))
2647 if (put_user(0, _frames
))
2649 result
= snd_pcm_playback_rewind(substream
, frames
);
2650 __put_user(result
, _frames
);
2651 return result
< 0 ? result
: 0;
2653 case SNDRV_PCM_IOCTL_FORWARD
:
2655 snd_pcm_uframes_t frames
;
2656 snd_pcm_uframes_t __user
*_frames
= arg
;
2657 snd_pcm_sframes_t result
;
2658 if (get_user(frames
, _frames
))
2660 if (put_user(0, _frames
))
2662 result
= snd_pcm_playback_forward(substream
, frames
);
2663 __put_user(result
, _frames
);
2664 return result
< 0 ? result
: 0;
2667 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2670 static int snd_pcm_capture_ioctl1(struct file
*file
,
2671 struct snd_pcm_substream
*substream
,
2672 unsigned int cmd
, void __user
*arg
)
2674 snd_assert(substream
!= NULL
, return -ENXIO
);
2675 snd_assert(substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
, return -EINVAL
);
2677 case SNDRV_PCM_IOCTL_READI_FRAMES
:
2679 struct snd_xferi xferi
;
2680 struct snd_xferi __user
*_xferi
= arg
;
2681 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2682 snd_pcm_sframes_t result
;
2683 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2685 if (put_user(0, &_xferi
->result
))
2687 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2689 result
= snd_pcm_lib_read(substream
, xferi
.buf
, xferi
.frames
);
2690 __put_user(result
, &_xferi
->result
);
2691 return result
< 0 ? result
: 0;
2693 case SNDRV_PCM_IOCTL_READN_FRAMES
:
2695 struct snd_xfern xfern
;
2696 struct snd_xfern __user
*_xfern
= arg
;
2697 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2699 snd_pcm_sframes_t result
;
2700 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2702 if (runtime
->channels
> 128)
2704 if (put_user(0, &_xfern
->result
))
2706 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2708 bufs
= kmalloc(sizeof(void *) * runtime
->channels
, GFP_KERNEL
);
2711 if (copy_from_user(bufs
, xfern
.bufs
, sizeof(void *) * runtime
->channels
)) {
2715 result
= snd_pcm_lib_readv(substream
, bufs
, xfern
.frames
);
2717 __put_user(result
, &_xfern
->result
);
2718 return result
< 0 ? result
: 0;
2720 case SNDRV_PCM_IOCTL_REWIND
:
2722 snd_pcm_uframes_t frames
;
2723 snd_pcm_uframes_t __user
*_frames
= arg
;
2724 snd_pcm_sframes_t result
;
2725 if (get_user(frames
, _frames
))
2727 if (put_user(0, _frames
))
2729 result
= snd_pcm_capture_rewind(substream
, frames
);
2730 __put_user(result
, _frames
);
2731 return result
< 0 ? result
: 0;
2733 case SNDRV_PCM_IOCTL_FORWARD
:
2735 snd_pcm_uframes_t frames
;
2736 snd_pcm_uframes_t __user
*_frames
= arg
;
2737 snd_pcm_sframes_t result
;
2738 if (get_user(frames
, _frames
))
2740 if (put_user(0, _frames
))
2742 result
= snd_pcm_capture_forward(substream
, frames
);
2743 __put_user(result
, _frames
);
2744 return result
< 0 ? result
: 0;
2747 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2750 static long snd_pcm_playback_ioctl(struct file
*file
, unsigned int cmd
,
2753 struct snd_pcm_file
*pcm_file
;
2755 pcm_file
= file
->private_data
;
2757 if (((cmd
>> 8) & 0xff) != 'A')
2760 return snd_pcm_playback_ioctl1(file
, pcm_file
->substream
, cmd
,
2761 (void __user
*)arg
);
2764 static long snd_pcm_capture_ioctl(struct file
*file
, unsigned int cmd
,
2767 struct snd_pcm_file
*pcm_file
;
2769 pcm_file
= file
->private_data
;
2771 if (((cmd
>> 8) & 0xff) != 'A')
2774 return snd_pcm_capture_ioctl1(file
, pcm_file
->substream
, cmd
,
2775 (void __user
*)arg
);
2778 int snd_pcm_kernel_ioctl(struct snd_pcm_substream
*substream
,
2779 unsigned int cmd
, void *arg
)
2784 fs
= snd_enter_user();
2785 switch (substream
->stream
) {
2786 case SNDRV_PCM_STREAM_PLAYBACK
:
2787 result
= snd_pcm_playback_ioctl1(NULL
, substream
, cmd
,
2788 (void __user
*)arg
);
2790 case SNDRV_PCM_STREAM_CAPTURE
:
2791 result
= snd_pcm_capture_ioctl1(NULL
, substream
, cmd
,
2792 (void __user
*)arg
);
2802 EXPORT_SYMBOL(snd_pcm_kernel_ioctl
);
2804 static ssize_t
snd_pcm_read(struct file
*file
, char __user
*buf
, size_t count
,
2807 struct snd_pcm_file
*pcm_file
;
2808 struct snd_pcm_substream
*substream
;
2809 struct snd_pcm_runtime
*runtime
;
2810 snd_pcm_sframes_t result
;
2812 pcm_file
= file
->private_data
;
2813 substream
= pcm_file
->substream
;
2814 snd_assert(substream
!= NULL
, return -ENXIO
);
2815 runtime
= substream
->runtime
;
2816 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2818 if (!frame_aligned(runtime
, count
))
2820 count
= bytes_to_frames(runtime
, count
);
2821 result
= snd_pcm_lib_read(substream
, buf
, count
);
2823 result
= frames_to_bytes(runtime
, result
);
2827 static ssize_t
snd_pcm_write(struct file
*file
, const char __user
*buf
,
2828 size_t count
, loff_t
* offset
)
2830 struct snd_pcm_file
*pcm_file
;
2831 struct snd_pcm_substream
*substream
;
2832 struct snd_pcm_runtime
*runtime
;
2833 snd_pcm_sframes_t result
;
2835 pcm_file
= file
->private_data
;
2836 substream
= pcm_file
->substream
;
2837 snd_assert(substream
!= NULL
, result
= -ENXIO
; goto end
);
2838 runtime
= substream
->runtime
;
2839 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
2843 if (!frame_aligned(runtime
, count
)) {
2847 count
= bytes_to_frames(runtime
, count
);
2848 result
= snd_pcm_lib_write(substream
, buf
, count
);
2850 result
= frames_to_bytes(runtime
, result
);
2855 static ssize_t
snd_pcm_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
2856 unsigned long nr_segs
, loff_t pos
)
2859 struct snd_pcm_file
*pcm_file
;
2860 struct snd_pcm_substream
*substream
;
2861 struct snd_pcm_runtime
*runtime
;
2862 snd_pcm_sframes_t result
;
2865 snd_pcm_uframes_t frames
;
2867 pcm_file
= iocb
->ki_filp
->private_data
;
2868 substream
= pcm_file
->substream
;
2869 snd_assert(substream
!= NULL
, return -ENXIO
);
2870 runtime
= substream
->runtime
;
2871 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2873 if (nr_segs
> 1024 || nr_segs
!= runtime
->channels
)
2875 if (!frame_aligned(runtime
, iov
->iov_len
))
2877 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2878 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2881 for (i
= 0; i
< nr_segs
; ++i
)
2882 bufs
[i
] = iov
[i
].iov_base
;
2883 result
= snd_pcm_lib_readv(substream
, bufs
, frames
);
2885 result
= frames_to_bytes(runtime
, result
);
2890 static ssize_t
snd_pcm_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
2891 unsigned long nr_segs
, loff_t pos
)
2893 struct snd_pcm_file
*pcm_file
;
2894 struct snd_pcm_substream
*substream
;
2895 struct snd_pcm_runtime
*runtime
;
2896 snd_pcm_sframes_t result
;
2899 snd_pcm_uframes_t frames
;
2901 pcm_file
= iocb
->ki_filp
->private_data
;
2902 substream
= pcm_file
->substream
;
2903 snd_assert(substream
!= NULL
, result
= -ENXIO
; goto end
);
2904 runtime
= substream
->runtime
;
2905 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
2909 if (nr_segs
> 128 || nr_segs
!= runtime
->channels
||
2910 !frame_aligned(runtime
, iov
->iov_len
)) {
2914 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2915 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2918 for (i
= 0; i
< nr_segs
; ++i
)
2919 bufs
[i
] = iov
[i
].iov_base
;
2920 result
= snd_pcm_lib_writev(substream
, bufs
, frames
);
2922 result
= frames_to_bytes(runtime
, result
);
2928 static unsigned int snd_pcm_playback_poll(struct file
*file
, poll_table
* wait
)
2930 struct snd_pcm_file
*pcm_file
;
2931 struct snd_pcm_substream
*substream
;
2932 struct snd_pcm_runtime
*runtime
;
2934 snd_pcm_uframes_t avail
;
2936 pcm_file
= file
->private_data
;
2938 substream
= pcm_file
->substream
;
2939 snd_assert(substream
!= NULL
, return -ENXIO
);
2940 runtime
= substream
->runtime
;
2942 poll_wait(file
, &runtime
->sleep
, wait
);
2944 snd_pcm_stream_lock_irq(substream
);
2945 avail
= snd_pcm_playback_avail(runtime
);
2946 switch (runtime
->status
->state
) {
2947 case SNDRV_PCM_STATE_RUNNING
:
2948 case SNDRV_PCM_STATE_PREPARED
:
2949 case SNDRV_PCM_STATE_PAUSED
:
2950 if (avail
>= runtime
->control
->avail_min
) {
2951 mask
= POLLOUT
| POLLWRNORM
;
2955 case SNDRV_PCM_STATE_DRAINING
:
2959 mask
= POLLOUT
| POLLWRNORM
| POLLERR
;
2962 snd_pcm_stream_unlock_irq(substream
);
2966 static unsigned int snd_pcm_capture_poll(struct file
*file
, poll_table
* wait
)
2968 struct snd_pcm_file
*pcm_file
;
2969 struct snd_pcm_substream
*substream
;
2970 struct snd_pcm_runtime
*runtime
;
2972 snd_pcm_uframes_t avail
;
2974 pcm_file
= file
->private_data
;
2976 substream
= pcm_file
->substream
;
2977 snd_assert(substream
!= NULL
, return -ENXIO
);
2978 runtime
= substream
->runtime
;
2980 poll_wait(file
, &runtime
->sleep
, wait
);
2982 snd_pcm_stream_lock_irq(substream
);
2983 avail
= snd_pcm_capture_avail(runtime
);
2984 switch (runtime
->status
->state
) {
2985 case SNDRV_PCM_STATE_RUNNING
:
2986 case SNDRV_PCM_STATE_PREPARED
:
2987 case SNDRV_PCM_STATE_PAUSED
:
2988 if (avail
>= runtime
->control
->avail_min
) {
2989 mask
= POLLIN
| POLLRDNORM
;
2994 case SNDRV_PCM_STATE_DRAINING
:
2996 mask
= POLLIN
| POLLRDNORM
;
3001 mask
= POLLIN
| POLLRDNORM
| POLLERR
;
3004 snd_pcm_stream_unlock_irq(substream
);
3013 * Only on coherent architectures, we can mmap the status and the control records
3014 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3016 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3018 * mmap status record
3020 static struct page
* snd_pcm_mmap_status_nopage(struct vm_area_struct
*area
,
3021 unsigned long address
, int *type
)
3023 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3024 struct snd_pcm_runtime
*runtime
;
3027 if (substream
== NULL
)
3029 runtime
= substream
->runtime
;
3030 page
= virt_to_page(runtime
->status
);
3033 *type
= VM_FAULT_MINOR
;
3037 static struct vm_operations_struct snd_pcm_vm_ops_status
=
3039 .nopage
= snd_pcm_mmap_status_nopage
,
3042 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3043 struct vm_area_struct
*area
)
3045 struct snd_pcm_runtime
*runtime
;
3047 if (!(area
->vm_flags
& VM_READ
))
3049 runtime
= substream
->runtime
;
3050 snd_assert(runtime
!= NULL
, return -EAGAIN
);
3051 size
= area
->vm_end
- area
->vm_start
;
3052 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)))
3054 area
->vm_ops
= &snd_pcm_vm_ops_status
;
3055 area
->vm_private_data
= substream
;
3056 area
->vm_flags
|= VM_RESERVED
;
3061 * mmap control record
3063 static struct page
* snd_pcm_mmap_control_nopage(struct vm_area_struct
*area
,
3064 unsigned long address
, int *type
)
3066 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3067 struct snd_pcm_runtime
*runtime
;
3070 if (substream
== NULL
)
3072 runtime
= substream
->runtime
;
3073 page
= virt_to_page(runtime
->control
);
3076 *type
= VM_FAULT_MINOR
;
3080 static struct vm_operations_struct snd_pcm_vm_ops_control
=
3082 .nopage
= snd_pcm_mmap_control_nopage
,
3085 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3086 struct vm_area_struct
*area
)
3088 struct snd_pcm_runtime
*runtime
;
3090 if (!(area
->vm_flags
& VM_READ
))
3092 runtime
= substream
->runtime
;
3093 snd_assert(runtime
!= NULL
, return -EAGAIN
);
3094 size
= area
->vm_end
- area
->vm_start
;
3095 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
)))
3097 area
->vm_ops
= &snd_pcm_vm_ops_control
;
3098 area
->vm_private_data
= substream
;
3099 area
->vm_flags
|= VM_RESERVED
;
3102 #else /* ! coherent mmap */
3104 * don't support mmap for status and control records.
3106 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3107 struct vm_area_struct
*area
)
3111 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3112 struct vm_area_struct
*area
)
3116 #endif /* coherent mmap */
3119 * nopage callback for mmapping a RAM page
3121 static struct page
*snd_pcm_mmap_data_nopage(struct vm_area_struct
*area
,
3122 unsigned long address
, int *type
)
3124 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3125 struct snd_pcm_runtime
*runtime
;
3126 unsigned long offset
;
3131 if (substream
== NULL
)
3133 runtime
= substream
->runtime
;
3134 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3135 offset
+= address
- area
->vm_start
;
3136 snd_assert((offset
% PAGE_SIZE
) == 0, return NOPAGE_OOM
);
3137 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3138 if (offset
> dma_bytes
- PAGE_SIZE
)
3139 return NOPAGE_SIGBUS
;
3140 if (substream
->ops
->page
) {
3141 page
= substream
->ops
->page(substream
, offset
);
3145 vaddr
= runtime
->dma_area
+ offset
;
3146 page
= virt_to_page(vaddr
);
3150 *type
= VM_FAULT_MINOR
;
3154 static struct vm_operations_struct snd_pcm_vm_ops_data
=
3156 .open
= snd_pcm_mmap_data_open
,
3157 .close
= snd_pcm_mmap_data_close
,
3158 .nopage
= snd_pcm_mmap_data_nopage
,
3162 * mmap the DMA buffer on RAM
3164 static int snd_pcm_default_mmap(struct snd_pcm_substream
*substream
,
3165 struct vm_area_struct
*area
)
3167 area
->vm_ops
= &snd_pcm_vm_ops_data
;
3168 area
->vm_private_data
= substream
;
3169 area
->vm_flags
|= VM_RESERVED
;
3170 atomic_inc(&substream
->mmap_count
);
3175 * mmap the DMA buffer on I/O memory area
3177 #if SNDRV_PCM_INFO_MMAP_IOMEM
3178 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio
=
3180 .open
= snd_pcm_mmap_data_open
,
3181 .close
= snd_pcm_mmap_data_close
,
3184 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream
*substream
,
3185 struct vm_area_struct
*area
)
3188 unsigned long offset
;
3190 #ifdef pgprot_noncached
3191 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3193 area
->vm_ops
= &snd_pcm_vm_ops_data_mmio
;
3194 area
->vm_private_data
= substream
;
3195 area
->vm_flags
|= VM_IO
;
3196 size
= area
->vm_end
- area
->vm_start
;
3197 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3198 if (io_remap_pfn_range(area
, area
->vm_start
,
3199 (substream
->runtime
->dma_addr
+ offset
) >> PAGE_SHIFT
,
3200 size
, area
->vm_page_prot
))
3202 atomic_inc(&substream
->mmap_count
);
3206 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem
);
3207 #endif /* SNDRV_PCM_INFO_MMAP */
3212 int snd_pcm_mmap_data(struct snd_pcm_substream
*substream
, struct file
*file
,
3213 struct vm_area_struct
*area
)
3215 struct snd_pcm_runtime
*runtime
;
3217 unsigned long offset
;
3220 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
3221 if (!(area
->vm_flags
& (VM_WRITE
|VM_READ
)))
3224 if (!(area
->vm_flags
& VM_READ
))
3227 runtime
= substream
->runtime
;
3228 snd_assert(runtime
!= NULL
, return -EAGAIN
);
3229 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3231 if (!(runtime
->info
& SNDRV_PCM_INFO_MMAP
))
3233 if (runtime
->access
== SNDRV_PCM_ACCESS_RW_INTERLEAVED
||
3234 runtime
->access
== SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
)
3236 size
= area
->vm_end
- area
->vm_start
;
3237 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3238 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3239 if ((size_t)size
> dma_bytes
)
3241 if (offset
> dma_bytes
- size
)
3244 if (substream
->ops
->mmap
)
3245 return substream
->ops
->mmap(substream
, area
);
3247 return snd_pcm_default_mmap(substream
, area
);
3250 EXPORT_SYMBOL(snd_pcm_mmap_data
);
3252 static int snd_pcm_mmap(struct file
*file
, struct vm_area_struct
*area
)
3254 struct snd_pcm_file
* pcm_file
;
3255 struct snd_pcm_substream
*substream
;
3256 unsigned long offset
;
3258 pcm_file
= file
->private_data
;
3259 substream
= pcm_file
->substream
;
3260 snd_assert(substream
!= NULL
, return -ENXIO
);
3262 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3264 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3265 if (pcm_file
->no_compat_mmap
)
3267 return snd_pcm_mmap_status(substream
, file
, area
);
3268 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3269 if (pcm_file
->no_compat_mmap
)
3271 return snd_pcm_mmap_control(substream
, file
, area
);
3273 return snd_pcm_mmap_data(substream
, file
, area
);
3278 static int snd_pcm_fasync(int fd
, struct file
* file
, int on
)
3280 struct snd_pcm_file
* pcm_file
;
3281 struct snd_pcm_substream
*substream
;
3282 struct snd_pcm_runtime
*runtime
;
3285 pcm_file
= file
->private_data
;
3286 substream
= pcm_file
->substream
;
3287 snd_assert(substream
!= NULL
, return -ENXIO
);
3288 runtime
= substream
->runtime
;
3290 err
= fasync_helper(fd
, file
, on
, &runtime
->fasync
);
3299 #ifdef CONFIG_COMPAT
3300 #include "pcm_compat.c"
3302 #define snd_pcm_ioctl_compat NULL
3306 * To be removed helpers to keep binary compatibility
3309 #ifdef CONFIG_SND_SUPPORT_OLD_API
3310 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3311 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3313 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params
*params
,
3314 struct snd_pcm_hw_params_old
*oparams
)
3318 memset(params
, 0, sizeof(*params
));
3319 params
->flags
= oparams
->flags
;
3320 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3321 params
->masks
[i
].bits
[0] = oparams
->masks
[i
];
3322 memcpy(params
->intervals
, oparams
->intervals
, sizeof(oparams
->intervals
));
3323 params
->rmask
= __OLD_TO_NEW_MASK(oparams
->rmask
);
3324 params
->cmask
= __OLD_TO_NEW_MASK(oparams
->cmask
);
3325 params
->info
= oparams
->info
;
3326 params
->msbits
= oparams
->msbits
;
3327 params
->rate_num
= oparams
->rate_num
;
3328 params
->rate_den
= oparams
->rate_den
;
3329 params
->fifo_size
= oparams
->fifo_size
;
3332 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old
*oparams
,
3333 struct snd_pcm_hw_params
*params
)
3337 memset(oparams
, 0, sizeof(*oparams
));
3338 oparams
->flags
= params
->flags
;
3339 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3340 oparams
->masks
[i
] = params
->masks
[i
].bits
[0];
3341 memcpy(oparams
->intervals
, params
->intervals
, sizeof(oparams
->intervals
));
3342 oparams
->rmask
= __NEW_TO_OLD_MASK(params
->rmask
);
3343 oparams
->cmask
= __NEW_TO_OLD_MASK(params
->cmask
);
3344 oparams
->info
= params
->info
;
3345 oparams
->msbits
= params
->msbits
;
3346 oparams
->rate_num
= params
->rate_num
;
3347 oparams
->rate_den
= params
->rate_den
;
3348 oparams
->fifo_size
= params
->fifo_size
;
3351 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
3352 struct snd_pcm_hw_params_old __user
* _oparams
)
3354 struct snd_pcm_hw_params
*params
;
3355 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3358 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3363 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_refine(substream
, params
);
3375 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3376 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3386 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
3387 struct snd_pcm_hw_params_old __user
* _oparams
)
3389 struct snd_pcm_hw_params
*params
;
3390 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3393 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3398 oparams
= kmalloc(sizeof(*oparams
), GFP_KERNEL
);
3403 if (copy_from_user(oparams
, _oparams
, sizeof(*oparams
))) {
3407 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3408 err
= snd_pcm_hw_params(substream
, params
);
3409 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3410 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3419 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3425 struct file_operations snd_pcm_f_ops
[2] = {
3427 .owner
= THIS_MODULE
,
3428 .write
= snd_pcm_write
,
3429 .aio_write
= snd_pcm_aio_write
,
3430 .open
= snd_pcm_playback_open
,
3431 .release
= snd_pcm_release
,
3432 .poll
= snd_pcm_playback_poll
,
3433 .unlocked_ioctl
= snd_pcm_playback_ioctl
,
3434 .compat_ioctl
= snd_pcm_ioctl_compat
,
3435 .mmap
= snd_pcm_mmap
,
3436 .fasync
= snd_pcm_fasync
,
3439 .owner
= THIS_MODULE
,
3440 .read
= snd_pcm_read
,
3441 .aio_read
= snd_pcm_aio_read
,
3442 .open
= snd_pcm_capture_open
,
3443 .release
= snd_pcm_release
,
3444 .poll
= snd_pcm_capture_poll
,
3445 .unlocked_ioctl
= snd_pcm_capture_ioctl
,
3446 .compat_ioctl
= snd_pcm_ioctl_compat
,
3447 .mmap
= snd_pcm_mmap
,
3448 .fasync
= snd_pcm_fasync
,