2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/module.h>
24 #include <linux/file.h>
25 #include <linux/slab.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos.h>
28 #include <linux/aio.h>
29 #include <linux/dma-mapping.h>
30 #include <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/info.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/timer.h>
36 #include <sound/minors.h>
38 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
39 #include <dma-coherence.h>
46 struct snd_pcm_hw_params_old
{
48 unsigned int masks
[SNDRV_PCM_HW_PARAM_SUBFORMAT
-
49 SNDRV_PCM_HW_PARAM_ACCESS
+ 1];
50 struct snd_interval intervals
[SNDRV_PCM_HW_PARAM_TICK_TIME
-
51 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
+ 1];
56 unsigned int rate_num
;
57 unsigned int rate_den
;
58 snd_pcm_uframes_t fifo_size
;
59 unsigned char reserved
[64];
62 #ifdef CONFIG_SND_SUPPORT_OLD_API
63 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
64 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
66 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
67 struct snd_pcm_hw_params_old __user
* _oparams
);
68 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
69 struct snd_pcm_hw_params_old __user
* _oparams
);
71 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
);
77 DEFINE_RWLOCK(snd_pcm_link_rwlock
);
78 EXPORT_SYMBOL(snd_pcm_link_rwlock
);
80 static DECLARE_RWSEM(snd_pcm_link_rwsem
);
82 static inline mm_segment_t
snd_enter_user(void)
84 mm_segment_t fs
= get_fs();
89 static inline void snd_leave_user(mm_segment_t fs
)
96 int snd_pcm_info(struct snd_pcm_substream
*substream
, struct snd_pcm_info
*info
)
98 struct snd_pcm_runtime
*runtime
;
99 struct snd_pcm
*pcm
= substream
->pcm
;
100 struct snd_pcm_str
*pstr
= substream
->pstr
;
102 memset(info
, 0, sizeof(*info
));
103 info
->card
= pcm
->card
->number
;
104 info
->device
= pcm
->device
;
105 info
->stream
= substream
->stream
;
106 info
->subdevice
= substream
->number
;
107 strlcpy(info
->id
, pcm
->id
, sizeof(info
->id
));
108 strlcpy(info
->name
, pcm
->name
, sizeof(info
->name
));
109 info
->dev_class
= pcm
->dev_class
;
110 info
->dev_subclass
= pcm
->dev_subclass
;
111 info
->subdevices_count
= pstr
->substream_count
;
112 info
->subdevices_avail
= pstr
->substream_count
- pstr
->substream_opened
;
113 strlcpy(info
->subname
, substream
->name
, sizeof(info
->subname
));
114 runtime
= substream
->runtime
;
115 /* AB: FIXME!!! This is definitely nonsense */
117 info
->sync
= runtime
->sync
;
118 substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_INFO
, info
);
123 int snd_pcm_info_user(struct snd_pcm_substream
*substream
,
124 struct snd_pcm_info __user
* _info
)
126 struct snd_pcm_info
*info
;
129 info
= kmalloc(sizeof(*info
), GFP_KERNEL
);
132 err
= snd_pcm_info(substream
, info
);
134 if (copy_to_user(_info
, info
, sizeof(*info
)))
144 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
145 static const char * const snd_pcm_hw_param_names
[] = {
149 HW_PARAM(SAMPLE_BITS
),
150 HW_PARAM(FRAME_BITS
),
153 HW_PARAM(PERIOD_TIME
),
154 HW_PARAM(PERIOD_SIZE
),
155 HW_PARAM(PERIOD_BYTES
),
157 HW_PARAM(BUFFER_TIME
),
158 HW_PARAM(BUFFER_SIZE
),
159 HW_PARAM(BUFFER_BYTES
),
164 int snd_pcm_hw_refine(struct snd_pcm_substream
*substream
,
165 struct snd_pcm_hw_params
*params
)
168 struct snd_pcm_hardware
*hw
;
169 struct snd_interval
*i
= NULL
;
170 struct snd_mask
*m
= NULL
;
171 struct snd_pcm_hw_constraints
*constrs
= &substream
->runtime
->hw_constraints
;
172 unsigned int rstamps
[constrs
->rules_num
];
173 unsigned int vstamps
[SNDRV_PCM_HW_PARAM_LAST_INTERVAL
+ 1];
174 unsigned int stamp
= 2;
178 params
->fifo_size
= 0;
179 if (params
->rmask
& (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS
))
181 if (params
->rmask
& (1 << SNDRV_PCM_HW_PARAM_RATE
)) {
182 params
->rate_num
= 0;
183 params
->rate_den
= 0;
186 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
187 m
= hw_param_mask(params
, k
);
188 if (snd_mask_empty(m
))
190 if (!(params
->rmask
& (1 << k
)))
193 printk(KERN_DEBUG
"%s = ", snd_pcm_hw_param_names
[k
]);
194 printk("%04x%04x%04x%04x -> ", m
->bits
[3], m
->bits
[2], m
->bits
[1], m
->bits
[0]);
196 changed
= snd_mask_refine(m
, constrs_mask(constrs
, k
));
198 printk("%04x%04x%04x%04x\n", m
->bits
[3], m
->bits
[2], m
->bits
[1], m
->bits
[0]);
201 params
->cmask
|= 1 << k
;
206 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
207 i
= hw_param_interval(params
, k
);
208 if (snd_interval_empty(i
))
210 if (!(params
->rmask
& (1 << k
)))
213 printk(KERN_DEBUG
"%s = ", snd_pcm_hw_param_names
[k
]);
218 i
->openmin
? '(' : '[', i
->min
,
219 i
->max
, i
->openmax
? ')' : ']');
222 changed
= snd_interval_refine(i
, constrs_interval(constrs
, k
));
227 printk("%c%u %u%c\n",
228 i
->openmin
? '(' : '[', i
->min
,
229 i
->max
, i
->openmax
? ')' : ']');
232 params
->cmask
|= 1 << k
;
237 for (k
= 0; k
< constrs
->rules_num
; k
++)
239 for (k
= 0; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++)
240 vstamps
[k
] = (params
->rmask
& (1 << k
)) ? 1 : 0;
243 for (k
= 0; k
< constrs
->rules_num
; k
++) {
244 struct snd_pcm_hw_rule
*r
= &constrs
->rules
[k
];
247 if (r
->cond
&& !(r
->cond
& params
->flags
))
249 for (d
= 0; r
->deps
[d
] >= 0; d
++) {
250 if (vstamps
[r
->deps
[d
]] > rstamps
[k
]) {
258 printk(KERN_DEBUG
"Rule %d [%p]: ", k
, r
->func
);
260 printk("%s = ", snd_pcm_hw_param_names
[r
->var
]);
261 if (hw_is_mask(r
->var
)) {
262 m
= hw_param_mask(params
, r
->var
);
263 printk("%x", *m
->bits
);
265 i
= hw_param_interval(params
, r
->var
);
270 i
->openmin
? '(' : '[', i
->min
,
271 i
->max
, i
->openmax
? ')' : ']');
275 changed
= r
->func(params
, r
);
279 if (hw_is_mask(r
->var
))
280 printk("%x", *m
->bits
);
286 i
->openmin
? '(' : '[', i
->min
,
287 i
->max
, i
->openmax
? ')' : ']');
293 if (changed
&& r
->var
>= 0) {
294 params
->cmask
|= (1 << r
->var
);
295 vstamps
[r
->var
] = stamp
;
303 if (!params
->msbits
) {
304 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
);
305 if (snd_interval_single(i
))
306 params
->msbits
= snd_interval_value(i
);
309 if (!params
->rate_den
) {
310 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
311 if (snd_interval_single(i
)) {
312 params
->rate_num
= snd_interval_value(i
);
313 params
->rate_den
= 1;
317 hw
= &substream
->runtime
->hw
;
319 params
->info
= hw
->info
& ~SNDRV_PCM_INFO_FIFO_IN_FRAMES
;
320 if (!params
->fifo_size
) {
321 m
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
322 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
323 if (snd_mask_min(m
) == snd_mask_max(m
) &&
324 snd_interval_min(i
) == snd_interval_max(i
)) {
325 changed
= substream
->ops
->ioctl(substream
,
326 SNDRV_PCM_IOCTL1_FIFO_SIZE
, params
);
335 EXPORT_SYMBOL(snd_pcm_hw_refine
);
337 static int snd_pcm_hw_refine_user(struct snd_pcm_substream
*substream
,
338 struct snd_pcm_hw_params __user
* _params
)
340 struct snd_pcm_hw_params
*params
;
343 params
= memdup_user(_params
, sizeof(*params
));
345 return PTR_ERR(params
);
347 err
= snd_pcm_hw_refine(substream
, params
);
348 if (copy_to_user(_params
, params
, sizeof(*params
))) {
357 static int period_to_usecs(struct snd_pcm_runtime
*runtime
)
362 return -1; /* invalid */
364 /* take 75% of period time as the deadline */
365 usecs
= (750000 / runtime
->rate
) * runtime
->period_size
;
366 usecs
+= ((750000 % runtime
->rate
) * runtime
->period_size
) /
372 static void snd_pcm_set_state(struct snd_pcm_substream
*substream
, int state
)
374 snd_pcm_stream_lock_irq(substream
);
375 if (substream
->runtime
->status
->state
!= SNDRV_PCM_STATE_DISCONNECTED
)
376 substream
->runtime
->status
->state
= state
;
377 snd_pcm_stream_unlock_irq(substream
);
380 static int snd_pcm_hw_params(struct snd_pcm_substream
*substream
,
381 struct snd_pcm_hw_params
*params
)
383 struct snd_pcm_runtime
*runtime
;
386 snd_pcm_uframes_t frames
;
388 if (PCM_RUNTIME_CHECK(substream
))
390 runtime
= substream
->runtime
;
391 snd_pcm_stream_lock_irq(substream
);
392 switch (runtime
->status
->state
) {
393 case SNDRV_PCM_STATE_OPEN
:
394 case SNDRV_PCM_STATE_SETUP
:
395 case SNDRV_PCM_STATE_PREPARED
:
398 snd_pcm_stream_unlock_irq(substream
);
401 snd_pcm_stream_unlock_irq(substream
);
402 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
403 if (!substream
->oss
.oss
)
405 if (atomic_read(&substream
->mmap_count
))
409 err
= snd_pcm_hw_refine(substream
, params
);
413 err
= snd_pcm_hw_params_choose(substream
, params
);
417 if (substream
->ops
->hw_params
!= NULL
) {
418 err
= substream
->ops
->hw_params(substream
, params
);
423 runtime
->access
= params_access(params
);
424 runtime
->format
= params_format(params
);
425 runtime
->subformat
= params_subformat(params
);
426 runtime
->channels
= params_channels(params
);
427 runtime
->rate
= params_rate(params
);
428 runtime
->period_size
= params_period_size(params
);
429 runtime
->periods
= params_periods(params
);
430 runtime
->buffer_size
= params_buffer_size(params
);
431 runtime
->info
= params
->info
;
432 runtime
->rate_num
= params
->rate_num
;
433 runtime
->rate_den
= params
->rate_den
;
434 runtime
->no_period_wakeup
=
435 (params
->info
& SNDRV_PCM_INFO_NO_PERIOD_WAKEUP
) &&
436 (params
->flags
& SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP
);
438 bits
= snd_pcm_format_physical_width(runtime
->format
);
439 runtime
->sample_bits
= bits
;
440 bits
*= runtime
->channels
;
441 runtime
->frame_bits
= bits
;
443 while (bits
% 8 != 0) {
447 runtime
->byte_align
= bits
/ 8;
448 runtime
->min_align
= frames
;
450 /* Default sw params */
451 runtime
->tstamp_mode
= SNDRV_PCM_TSTAMP_NONE
;
452 runtime
->period_step
= 1;
453 runtime
->control
->avail_min
= runtime
->period_size
;
454 runtime
->start_threshold
= 1;
455 runtime
->stop_threshold
= runtime
->buffer_size
;
456 runtime
->silence_threshold
= 0;
457 runtime
->silence_size
= 0;
458 runtime
->boundary
= runtime
->buffer_size
;
459 while (runtime
->boundary
* 2 <= LONG_MAX
- runtime
->buffer_size
)
460 runtime
->boundary
*= 2;
462 snd_pcm_timer_resolution_change(substream
);
463 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_SETUP
);
465 if (pm_qos_request_active(&substream
->latency_pm_qos_req
))
466 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
467 if ((usecs
= period_to_usecs(runtime
)) >= 0)
468 pm_qos_add_request(&substream
->latency_pm_qos_req
,
469 PM_QOS_CPU_DMA_LATENCY
, usecs
);
472 /* hardware might be unusable from this time,
473 so we force application to retry to set
474 the correct hardware parameter settings */
475 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_OPEN
);
476 if (substream
->ops
->hw_free
!= NULL
)
477 substream
->ops
->hw_free(substream
);
481 static int snd_pcm_hw_params_user(struct snd_pcm_substream
*substream
,
482 struct snd_pcm_hw_params __user
* _params
)
484 struct snd_pcm_hw_params
*params
;
487 params
= memdup_user(_params
, sizeof(*params
));
489 return PTR_ERR(params
);
491 err
= snd_pcm_hw_params(substream
, params
);
492 if (copy_to_user(_params
, params
, sizeof(*params
))) {
501 static int snd_pcm_hw_free(struct snd_pcm_substream
*substream
)
503 struct snd_pcm_runtime
*runtime
;
506 if (PCM_RUNTIME_CHECK(substream
))
508 runtime
= substream
->runtime
;
509 snd_pcm_stream_lock_irq(substream
);
510 switch (runtime
->status
->state
) {
511 case SNDRV_PCM_STATE_SETUP
:
512 case SNDRV_PCM_STATE_PREPARED
:
515 snd_pcm_stream_unlock_irq(substream
);
518 snd_pcm_stream_unlock_irq(substream
);
519 if (atomic_read(&substream
->mmap_count
))
521 if (substream
->ops
->hw_free
)
522 result
= substream
->ops
->hw_free(substream
);
523 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_OPEN
);
524 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
528 static int snd_pcm_sw_params(struct snd_pcm_substream
*substream
,
529 struct snd_pcm_sw_params
*params
)
531 struct snd_pcm_runtime
*runtime
;
534 if (PCM_RUNTIME_CHECK(substream
))
536 runtime
= substream
->runtime
;
537 snd_pcm_stream_lock_irq(substream
);
538 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
539 snd_pcm_stream_unlock_irq(substream
);
542 snd_pcm_stream_unlock_irq(substream
);
544 if (params
->tstamp_mode
> SNDRV_PCM_TSTAMP_LAST
)
546 if (params
->avail_min
== 0)
548 if (params
->silence_size
>= runtime
->boundary
) {
549 if (params
->silence_threshold
!= 0)
552 if (params
->silence_size
> params
->silence_threshold
)
554 if (params
->silence_threshold
> runtime
->buffer_size
)
558 snd_pcm_stream_lock_irq(substream
);
559 runtime
->tstamp_mode
= params
->tstamp_mode
;
560 runtime
->period_step
= params
->period_step
;
561 runtime
->control
->avail_min
= params
->avail_min
;
562 runtime
->start_threshold
= params
->start_threshold
;
563 runtime
->stop_threshold
= params
->stop_threshold
;
564 runtime
->silence_threshold
= params
->silence_threshold
;
565 runtime
->silence_size
= params
->silence_size
;
566 params
->boundary
= runtime
->boundary
;
567 if (snd_pcm_running(substream
)) {
568 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
569 runtime
->silence_size
> 0)
570 snd_pcm_playback_silence(substream
, ULONG_MAX
);
571 err
= snd_pcm_update_state(substream
, runtime
);
573 snd_pcm_stream_unlock_irq(substream
);
577 static int snd_pcm_sw_params_user(struct snd_pcm_substream
*substream
,
578 struct snd_pcm_sw_params __user
* _params
)
580 struct snd_pcm_sw_params params
;
582 if (copy_from_user(¶ms
, _params
, sizeof(params
)))
584 err
= snd_pcm_sw_params(substream
, ¶ms
);
585 if (copy_to_user(_params
, ¶ms
, sizeof(params
)))
590 int snd_pcm_status(struct snd_pcm_substream
*substream
,
591 struct snd_pcm_status
*status
)
593 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
595 snd_pcm_stream_lock_irq(substream
);
596 status
->state
= runtime
->status
->state
;
597 status
->suspended_state
= runtime
->status
->suspended_state
;
598 if (status
->state
== SNDRV_PCM_STATE_OPEN
)
600 status
->trigger_tstamp
= runtime
->trigger_tstamp
;
601 if (snd_pcm_running(substream
)) {
602 snd_pcm_update_hw_ptr(substream
);
603 if (runtime
->tstamp_mode
== SNDRV_PCM_TSTAMP_ENABLE
) {
604 status
->tstamp
= runtime
->status
->tstamp
;
605 status
->audio_tstamp
=
606 runtime
->status
->audio_tstamp
;
610 snd_pcm_gettime(runtime
, &status
->tstamp
);
612 status
->appl_ptr
= runtime
->control
->appl_ptr
;
613 status
->hw_ptr
= runtime
->status
->hw_ptr
;
614 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
615 status
->avail
= snd_pcm_playback_avail(runtime
);
616 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
||
617 runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
618 status
->delay
= runtime
->buffer_size
- status
->avail
;
619 status
->delay
+= runtime
->delay
;
623 status
->avail
= snd_pcm_capture_avail(runtime
);
624 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
)
625 status
->delay
= status
->avail
+ runtime
->delay
;
629 status
->avail_max
= runtime
->avail_max
;
630 status
->overrange
= runtime
->overrange
;
631 runtime
->avail_max
= 0;
632 runtime
->overrange
= 0;
634 snd_pcm_stream_unlock_irq(substream
);
638 static int snd_pcm_status_user(struct snd_pcm_substream
*substream
,
639 struct snd_pcm_status __user
* _status
)
641 struct snd_pcm_status status
;
644 memset(&status
, 0, sizeof(status
));
645 res
= snd_pcm_status(substream
, &status
);
648 if (copy_to_user(_status
, &status
, sizeof(status
)))
653 static int snd_pcm_channel_info(struct snd_pcm_substream
*substream
,
654 struct snd_pcm_channel_info
* info
)
656 struct snd_pcm_runtime
*runtime
;
657 unsigned int channel
;
659 channel
= info
->channel
;
660 runtime
= substream
->runtime
;
661 snd_pcm_stream_lock_irq(substream
);
662 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
663 snd_pcm_stream_unlock_irq(substream
);
666 snd_pcm_stream_unlock_irq(substream
);
667 if (channel
>= runtime
->channels
)
669 memset(info
, 0, sizeof(*info
));
670 info
->channel
= channel
;
671 return substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_CHANNEL_INFO
, info
);
674 static int snd_pcm_channel_info_user(struct snd_pcm_substream
*substream
,
675 struct snd_pcm_channel_info __user
* _info
)
677 struct snd_pcm_channel_info info
;
680 if (copy_from_user(&info
, _info
, sizeof(info
)))
682 res
= snd_pcm_channel_info(substream
, &info
);
685 if (copy_to_user(_info
, &info
, sizeof(info
)))
690 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream
*substream
)
692 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
693 if (runtime
->trigger_master
== NULL
)
695 if (runtime
->trigger_master
== substream
) {
696 snd_pcm_gettime(runtime
, &runtime
->trigger_tstamp
);
698 snd_pcm_trigger_tstamp(runtime
->trigger_master
);
699 runtime
->trigger_tstamp
= runtime
->trigger_master
->runtime
->trigger_tstamp
;
701 runtime
->trigger_master
= NULL
;
705 int (*pre_action
)(struct snd_pcm_substream
*substream
, int state
);
706 int (*do_action
)(struct snd_pcm_substream
*substream
, int state
);
707 void (*undo_action
)(struct snd_pcm_substream
*substream
, int state
);
708 void (*post_action
)(struct snd_pcm_substream
*substream
, int state
);
712 * this functions is core for handling of linked stream
713 * Note: the stream state might be changed also on failure
714 * Note2: call with calling stream lock + link lock
716 static int snd_pcm_action_group(struct action_ops
*ops
,
717 struct snd_pcm_substream
*substream
,
718 int state
, int do_lock
)
720 struct snd_pcm_substream
*s
= NULL
;
721 struct snd_pcm_substream
*s1
;
724 snd_pcm_group_for_each_entry(s
, substream
) {
725 if (do_lock
&& s
!= substream
)
726 spin_lock_nested(&s
->self_group
.lock
,
727 SINGLE_DEPTH_NESTING
);
728 res
= ops
->pre_action(s
, state
);
732 snd_pcm_group_for_each_entry(s
, substream
) {
733 res
= ops
->do_action(s
, state
);
735 if (ops
->undo_action
) {
736 snd_pcm_group_for_each_entry(s1
, substream
) {
737 if (s1
== s
) /* failed stream */
739 ops
->undo_action(s1
, state
);
742 s
= NULL
; /* unlock all */
746 snd_pcm_group_for_each_entry(s
, substream
) {
747 ops
->post_action(s
, state
);
752 snd_pcm_group_for_each_entry(s1
, substream
) {
754 spin_unlock(&s1
->self_group
.lock
);
755 if (s1
== s
) /* end */
763 * Note: call with stream lock
765 static int snd_pcm_action_single(struct action_ops
*ops
,
766 struct snd_pcm_substream
*substream
,
771 res
= ops
->pre_action(substream
, state
);
774 res
= ops
->do_action(substream
, state
);
776 ops
->post_action(substream
, state
);
777 else if (ops
->undo_action
)
778 ops
->undo_action(substream
, state
);
783 * Note: call with stream lock
785 static int snd_pcm_action(struct action_ops
*ops
,
786 struct snd_pcm_substream
*substream
,
791 if (snd_pcm_stream_linked(substream
)) {
792 if (!spin_trylock(&substream
->group
->lock
)) {
793 spin_unlock(&substream
->self_group
.lock
);
794 spin_lock(&substream
->group
->lock
);
795 spin_lock(&substream
->self_group
.lock
);
797 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
798 spin_unlock(&substream
->group
->lock
);
800 res
= snd_pcm_action_single(ops
, substream
, state
);
806 * Note: don't use any locks before
808 static int snd_pcm_action_lock_irq(struct action_ops
*ops
,
809 struct snd_pcm_substream
*substream
,
814 read_lock_irq(&snd_pcm_link_rwlock
);
815 if (snd_pcm_stream_linked(substream
)) {
816 spin_lock(&substream
->group
->lock
);
817 spin_lock(&substream
->self_group
.lock
);
818 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
819 spin_unlock(&substream
->self_group
.lock
);
820 spin_unlock(&substream
->group
->lock
);
822 spin_lock(&substream
->self_group
.lock
);
823 res
= snd_pcm_action_single(ops
, substream
, state
);
824 spin_unlock(&substream
->self_group
.lock
);
826 read_unlock_irq(&snd_pcm_link_rwlock
);
832 static int snd_pcm_action_nonatomic(struct action_ops
*ops
,
833 struct snd_pcm_substream
*substream
,
838 down_read(&snd_pcm_link_rwsem
);
839 if (snd_pcm_stream_linked(substream
))
840 res
= snd_pcm_action_group(ops
, substream
, state
, 0);
842 res
= snd_pcm_action_single(ops
, substream
, state
);
843 up_read(&snd_pcm_link_rwsem
);
850 static int snd_pcm_pre_start(struct snd_pcm_substream
*substream
, int state
)
852 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
853 if (runtime
->status
->state
!= SNDRV_PCM_STATE_PREPARED
)
855 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
856 !snd_pcm_playback_data(substream
))
858 runtime
->trigger_master
= substream
;
862 static int snd_pcm_do_start(struct snd_pcm_substream
*substream
, int state
)
864 if (substream
->runtime
->trigger_master
!= substream
)
866 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_START
);
869 static void snd_pcm_undo_start(struct snd_pcm_substream
*substream
, int state
)
871 if (substream
->runtime
->trigger_master
== substream
)
872 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
875 static void snd_pcm_post_start(struct snd_pcm_substream
*substream
, int state
)
877 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
878 snd_pcm_trigger_tstamp(substream
);
879 runtime
->hw_ptr_jiffies
= jiffies
;
880 runtime
->hw_ptr_buffer_jiffies
= (runtime
->buffer_size
* HZ
) /
882 runtime
->status
->state
= state
;
883 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
884 runtime
->silence_size
> 0)
885 snd_pcm_playback_silence(substream
, ULONG_MAX
);
886 if (substream
->timer
)
887 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTART
,
888 &runtime
->trigger_tstamp
);
891 static struct action_ops snd_pcm_action_start
= {
892 .pre_action
= snd_pcm_pre_start
,
893 .do_action
= snd_pcm_do_start
,
894 .undo_action
= snd_pcm_undo_start
,
895 .post_action
= snd_pcm_post_start
899 * snd_pcm_start - start all linked streams
900 * @substream: the PCM substream instance
902 * Return: Zero if successful, or a negative error code.
904 int snd_pcm_start(struct snd_pcm_substream
*substream
)
906 return snd_pcm_action(&snd_pcm_action_start
, substream
,
907 SNDRV_PCM_STATE_RUNNING
);
913 static int snd_pcm_pre_stop(struct snd_pcm_substream
*substream
, int state
)
915 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
916 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
918 runtime
->trigger_master
= substream
;
922 static int snd_pcm_do_stop(struct snd_pcm_substream
*substream
, int state
)
924 if (substream
->runtime
->trigger_master
== substream
&&
925 snd_pcm_running(substream
))
926 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
927 return 0; /* unconditonally stop all substreams */
930 static void snd_pcm_post_stop(struct snd_pcm_substream
*substream
, int state
)
932 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
933 if (runtime
->status
->state
!= state
) {
934 snd_pcm_trigger_tstamp(substream
);
935 if (substream
->timer
)
936 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTOP
,
937 &runtime
->trigger_tstamp
);
938 runtime
->status
->state
= state
;
940 wake_up(&runtime
->sleep
);
941 wake_up(&runtime
->tsleep
);
944 static struct action_ops snd_pcm_action_stop
= {
945 .pre_action
= snd_pcm_pre_stop
,
946 .do_action
= snd_pcm_do_stop
,
947 .post_action
= snd_pcm_post_stop
951 * snd_pcm_stop - try to stop all running streams in the substream group
952 * @substream: the PCM substream instance
953 * @state: PCM state after stopping the stream
955 * The state of each stream is then changed to the given state unconditionally.
957 * Return: Zero if succesful, or a negative error code.
959 int snd_pcm_stop(struct snd_pcm_substream
*substream
, snd_pcm_state_t state
)
961 return snd_pcm_action(&snd_pcm_action_stop
, substream
, state
);
964 EXPORT_SYMBOL(snd_pcm_stop
);
967 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
968 * @substream: the PCM substream
970 * After stopping, the state is changed to SETUP.
971 * Unlike snd_pcm_stop(), this affects only the given stream.
973 * Return: Zero if succesful, or a negative error code.
975 int snd_pcm_drain_done(struct snd_pcm_substream
*substream
)
977 return snd_pcm_action_single(&snd_pcm_action_stop
, substream
,
978 SNDRV_PCM_STATE_SETUP
);
984 static int snd_pcm_pre_pause(struct snd_pcm_substream
*substream
, int push
)
986 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
987 if (!(runtime
->info
& SNDRV_PCM_INFO_PAUSE
))
990 if (runtime
->status
->state
!= SNDRV_PCM_STATE_RUNNING
)
992 } else if (runtime
->status
->state
!= SNDRV_PCM_STATE_PAUSED
)
994 runtime
->trigger_master
= substream
;
998 static int snd_pcm_do_pause(struct snd_pcm_substream
*substream
, int push
)
1000 if (substream
->runtime
->trigger_master
!= substream
)
1002 /* some drivers might use hw_ptr to recover from the pause -
1003 update the hw_ptr now */
1005 snd_pcm_update_hw_ptr(substream
);
1006 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1007 * a delta between the current jiffies, this gives a large enough
1008 * delta, effectively to skip the check once.
1010 substream
->runtime
->hw_ptr_jiffies
= jiffies
- HZ
* 1000;
1011 return substream
->ops
->trigger(substream
,
1012 push
? SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
1013 SNDRV_PCM_TRIGGER_PAUSE_RELEASE
);
1016 static void snd_pcm_undo_pause(struct snd_pcm_substream
*substream
, int push
)
1018 if (substream
->runtime
->trigger_master
== substream
)
1019 substream
->ops
->trigger(substream
,
1020 push
? SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1021 SNDRV_PCM_TRIGGER_PAUSE_PUSH
);
1024 static void snd_pcm_post_pause(struct snd_pcm_substream
*substream
, int push
)
1026 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1027 snd_pcm_trigger_tstamp(substream
);
1029 runtime
->status
->state
= SNDRV_PCM_STATE_PAUSED
;
1030 if (substream
->timer
)
1031 snd_timer_notify(substream
->timer
,
1032 SNDRV_TIMER_EVENT_MPAUSE
,
1033 &runtime
->trigger_tstamp
);
1034 wake_up(&runtime
->sleep
);
1035 wake_up(&runtime
->tsleep
);
1037 runtime
->status
->state
= SNDRV_PCM_STATE_RUNNING
;
1038 if (substream
->timer
)
1039 snd_timer_notify(substream
->timer
,
1040 SNDRV_TIMER_EVENT_MCONTINUE
,
1041 &runtime
->trigger_tstamp
);
1045 static struct action_ops snd_pcm_action_pause
= {
1046 .pre_action
= snd_pcm_pre_pause
,
1047 .do_action
= snd_pcm_do_pause
,
1048 .undo_action
= snd_pcm_undo_pause
,
1049 .post_action
= snd_pcm_post_pause
1053 * Push/release the pause for all linked streams.
1055 static int snd_pcm_pause(struct snd_pcm_substream
*substream
, int push
)
1057 return snd_pcm_action(&snd_pcm_action_pause
, substream
, push
);
1063 static int snd_pcm_pre_suspend(struct snd_pcm_substream
*substream
, int state
)
1065 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1066 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1068 runtime
->trigger_master
= substream
;
1072 static int snd_pcm_do_suspend(struct snd_pcm_substream
*substream
, int state
)
1074 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1075 if (runtime
->trigger_master
!= substream
)
1077 if (! snd_pcm_running(substream
))
1079 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1080 return 0; /* suspend unconditionally */
1083 static void snd_pcm_post_suspend(struct snd_pcm_substream
*substream
, int state
)
1085 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1086 snd_pcm_trigger_tstamp(substream
);
1087 if (substream
->timer
)
1088 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSUSPEND
,
1089 &runtime
->trigger_tstamp
);
1090 runtime
->status
->suspended_state
= runtime
->status
->state
;
1091 runtime
->status
->state
= SNDRV_PCM_STATE_SUSPENDED
;
1092 wake_up(&runtime
->sleep
);
1093 wake_up(&runtime
->tsleep
);
1096 static struct action_ops snd_pcm_action_suspend
= {
1097 .pre_action
= snd_pcm_pre_suspend
,
1098 .do_action
= snd_pcm_do_suspend
,
1099 .post_action
= snd_pcm_post_suspend
1103 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1104 * @substream: the PCM substream
1106 * After this call, all streams are changed to SUSPENDED state.
1108 * Return: Zero if successful (or @substream is %NULL), or a negative error
1111 int snd_pcm_suspend(struct snd_pcm_substream
*substream
)
1114 unsigned long flags
;
1119 snd_pcm_stream_lock_irqsave(substream
, flags
);
1120 err
= snd_pcm_action(&snd_pcm_action_suspend
, substream
, 0);
1121 snd_pcm_stream_unlock_irqrestore(substream
, flags
);
1125 EXPORT_SYMBOL(snd_pcm_suspend
);
1128 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1129 * @pcm: the PCM instance
1131 * After this call, all streams are changed to SUSPENDED state.
1133 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1135 int snd_pcm_suspend_all(struct snd_pcm
*pcm
)
1137 struct snd_pcm_substream
*substream
;
1138 int stream
, err
= 0;
1143 for (stream
= 0; stream
< 2; stream
++) {
1144 for (substream
= pcm
->streams
[stream
].substream
;
1145 substream
; substream
= substream
->next
) {
1146 /* FIXME: the open/close code should lock this as well */
1147 if (substream
->runtime
== NULL
)
1149 err
= snd_pcm_suspend(substream
);
1150 if (err
< 0 && err
!= -EBUSY
)
1157 EXPORT_SYMBOL(snd_pcm_suspend_all
);
1161 static int snd_pcm_pre_resume(struct snd_pcm_substream
*substream
, int state
)
1163 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1164 if (!(runtime
->info
& SNDRV_PCM_INFO_RESUME
))
1166 runtime
->trigger_master
= substream
;
1170 static int snd_pcm_do_resume(struct snd_pcm_substream
*substream
, int state
)
1172 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1173 if (runtime
->trigger_master
!= substream
)
1175 /* DMA not running previously? */
1176 if (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_RUNNING
&&
1177 (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_DRAINING
||
1178 substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
1180 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_RESUME
);
1183 static void snd_pcm_undo_resume(struct snd_pcm_substream
*substream
, int state
)
1185 if (substream
->runtime
->trigger_master
== substream
&&
1186 snd_pcm_running(substream
))
1187 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1190 static void snd_pcm_post_resume(struct snd_pcm_substream
*substream
, int state
)
1192 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1193 snd_pcm_trigger_tstamp(substream
);
1194 if (substream
->timer
)
1195 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MRESUME
,
1196 &runtime
->trigger_tstamp
);
1197 runtime
->status
->state
= runtime
->status
->suspended_state
;
1200 static struct action_ops snd_pcm_action_resume
= {
1201 .pre_action
= snd_pcm_pre_resume
,
1202 .do_action
= snd_pcm_do_resume
,
1203 .undo_action
= snd_pcm_undo_resume
,
1204 .post_action
= snd_pcm_post_resume
1207 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1209 struct snd_card
*card
= substream
->pcm
->card
;
1212 snd_power_lock(card
);
1213 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1214 res
= snd_pcm_action_lock_irq(&snd_pcm_action_resume
, substream
, 0);
1215 snd_power_unlock(card
);
1221 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1226 #endif /* CONFIG_PM */
1231 * Change the RUNNING stream(s) to XRUN state.
1233 static int snd_pcm_xrun(struct snd_pcm_substream
*substream
)
1235 struct snd_card
*card
= substream
->pcm
->card
;
1236 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1239 snd_power_lock(card
);
1240 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1241 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1246 snd_pcm_stream_lock_irq(substream
);
1247 switch (runtime
->status
->state
) {
1248 case SNDRV_PCM_STATE_XRUN
:
1249 result
= 0; /* already there */
1251 case SNDRV_PCM_STATE_RUNNING
:
1252 result
= snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
1257 snd_pcm_stream_unlock_irq(substream
);
1259 snd_power_unlock(card
);
1266 static int snd_pcm_pre_reset(struct snd_pcm_substream
*substream
, int state
)
1268 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1269 switch (runtime
->status
->state
) {
1270 case SNDRV_PCM_STATE_RUNNING
:
1271 case SNDRV_PCM_STATE_PREPARED
:
1272 case SNDRV_PCM_STATE_PAUSED
:
1273 case SNDRV_PCM_STATE_SUSPENDED
:
1280 static int snd_pcm_do_reset(struct snd_pcm_substream
*substream
, int state
)
1282 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1283 int err
= substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_RESET
, NULL
);
1286 runtime
->hw_ptr_base
= 0;
1287 runtime
->hw_ptr_interrupt
= runtime
->status
->hw_ptr
-
1288 runtime
->status
->hw_ptr
% runtime
->period_size
;
1289 runtime
->silence_start
= runtime
->status
->hw_ptr
;
1290 runtime
->silence_filled
= 0;
1294 static void snd_pcm_post_reset(struct snd_pcm_substream
*substream
, int state
)
1296 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1297 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1298 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
1299 runtime
->silence_size
> 0)
1300 snd_pcm_playback_silence(substream
, ULONG_MAX
);
1303 static struct action_ops snd_pcm_action_reset
= {
1304 .pre_action
= snd_pcm_pre_reset
,
1305 .do_action
= snd_pcm_do_reset
,
1306 .post_action
= snd_pcm_post_reset
1309 static int snd_pcm_reset(struct snd_pcm_substream
*substream
)
1311 return snd_pcm_action_nonatomic(&snd_pcm_action_reset
, substream
, 0);
1317 /* we use the second argument for updating f_flags */
1318 static int snd_pcm_pre_prepare(struct snd_pcm_substream
*substream
,
1321 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1322 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1323 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
)
1325 if (snd_pcm_running(substream
))
1327 substream
->f_flags
= f_flags
;
1331 static int snd_pcm_do_prepare(struct snd_pcm_substream
*substream
, int state
)
1334 err
= substream
->ops
->prepare(substream
);
1337 return snd_pcm_do_reset(substream
, 0);
1340 static void snd_pcm_post_prepare(struct snd_pcm_substream
*substream
, int state
)
1342 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1343 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1344 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_PREPARED
);
1347 static struct action_ops snd_pcm_action_prepare
= {
1348 .pre_action
= snd_pcm_pre_prepare
,
1349 .do_action
= snd_pcm_do_prepare
,
1350 .post_action
= snd_pcm_post_prepare
1354 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1355 * @substream: the PCM substream instance
1356 * @file: file to refer f_flags
1358 * Return: Zero if successful, or a negative error code.
1360 static int snd_pcm_prepare(struct snd_pcm_substream
*substream
,
1364 struct snd_card
*card
= substream
->pcm
->card
;
1368 f_flags
= file
->f_flags
;
1370 f_flags
= substream
->f_flags
;
1372 snd_power_lock(card
);
1373 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1374 res
= snd_pcm_action_nonatomic(&snd_pcm_action_prepare
,
1375 substream
, f_flags
);
1376 snd_power_unlock(card
);
1384 static int snd_pcm_pre_drain_init(struct snd_pcm_substream
*substream
, int state
)
1386 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1387 switch (runtime
->status
->state
) {
1388 case SNDRV_PCM_STATE_OPEN
:
1389 case SNDRV_PCM_STATE_DISCONNECTED
:
1390 case SNDRV_PCM_STATE_SUSPENDED
:
1393 runtime
->trigger_master
= substream
;
1397 static int snd_pcm_do_drain_init(struct snd_pcm_substream
*substream
, int state
)
1399 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1400 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
1401 switch (runtime
->status
->state
) {
1402 case SNDRV_PCM_STATE_PREPARED
:
1403 /* start playback stream if possible */
1404 if (! snd_pcm_playback_empty(substream
)) {
1405 snd_pcm_do_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1406 snd_pcm_post_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1409 case SNDRV_PCM_STATE_RUNNING
:
1410 runtime
->status
->state
= SNDRV_PCM_STATE_DRAINING
;
1412 case SNDRV_PCM_STATE_XRUN
:
1413 runtime
->status
->state
= SNDRV_PCM_STATE_SETUP
;
1419 /* stop running stream */
1420 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
) {
1421 int new_state
= snd_pcm_capture_avail(runtime
) > 0 ?
1422 SNDRV_PCM_STATE_DRAINING
: SNDRV_PCM_STATE_SETUP
;
1423 snd_pcm_do_stop(substream
, new_state
);
1424 snd_pcm_post_stop(substream
, new_state
);
1430 static void snd_pcm_post_drain_init(struct snd_pcm_substream
*substream
, int state
)
1434 static struct action_ops snd_pcm_action_drain_init
= {
1435 .pre_action
= snd_pcm_pre_drain_init
,
1436 .do_action
= snd_pcm_do_drain_init
,
1437 .post_action
= snd_pcm_post_drain_init
1440 static int snd_pcm_drop(struct snd_pcm_substream
*substream
);
1443 * Drain the stream(s).
1444 * When the substream is linked, sync until the draining of all playback streams
1446 * After this call, all streams are supposed to be either SETUP or DRAINING
1447 * (capture only) state.
1449 static int snd_pcm_drain(struct snd_pcm_substream
*substream
,
1452 struct snd_card
*card
;
1453 struct snd_pcm_runtime
*runtime
;
1454 struct snd_pcm_substream
*s
;
1459 card
= substream
->pcm
->card
;
1460 runtime
= substream
->runtime
;
1462 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1465 snd_power_lock(card
);
1466 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1467 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1469 snd_power_unlock(card
);
1475 if (file
->f_flags
& O_NONBLOCK
)
1477 } else if (substream
->f_flags
& O_NONBLOCK
)
1480 down_read(&snd_pcm_link_rwsem
);
1481 snd_pcm_stream_lock_irq(substream
);
1483 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1484 snd_pcm_pause(substream
, 0);
1486 /* pre-start/stop - all running streams are changed to DRAINING state */
1487 result
= snd_pcm_action(&snd_pcm_action_drain_init
, substream
, 0);
1490 /* in non-blocking, we don't wait in ioctl but let caller poll */
1498 struct snd_pcm_runtime
*to_check
;
1499 if (signal_pending(current
)) {
1500 result
= -ERESTARTSYS
;
1503 /* find a substream to drain */
1505 snd_pcm_group_for_each_entry(s
, substream
) {
1506 if (s
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
)
1508 runtime
= s
->runtime
;
1509 if (runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
1515 break; /* all drained */
1516 init_waitqueue_entry(&wait
, current
);
1517 add_wait_queue(&to_check
->sleep
, &wait
);
1518 snd_pcm_stream_unlock_irq(substream
);
1519 up_read(&snd_pcm_link_rwsem
);
1520 snd_power_unlock(card
);
1521 if (runtime
->no_period_wakeup
)
1522 tout
= MAX_SCHEDULE_TIMEOUT
;
1525 if (runtime
->rate
) {
1526 long t
= runtime
->period_size
* 2 / runtime
->rate
;
1527 tout
= max(t
, tout
);
1529 tout
= msecs_to_jiffies(tout
* 1000);
1531 tout
= schedule_timeout_interruptible(tout
);
1532 snd_power_lock(card
);
1533 down_read(&snd_pcm_link_rwsem
);
1534 snd_pcm_stream_lock_irq(substream
);
1535 remove_wait_queue(&to_check
->sleep
, &wait
);
1536 if (card
->shutdown
) {
1541 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1544 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1545 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1553 snd_pcm_stream_unlock_irq(substream
);
1554 up_read(&snd_pcm_link_rwsem
);
1555 snd_power_unlock(card
);
1563 * Immediately put all linked substreams into SETUP state.
1565 static int snd_pcm_drop(struct snd_pcm_substream
*substream
)
1567 struct snd_pcm_runtime
*runtime
;
1570 if (PCM_RUNTIME_CHECK(substream
))
1572 runtime
= substream
->runtime
;
1574 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1575 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
||
1576 runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1579 snd_pcm_stream_lock_irq(substream
);
1581 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1582 snd_pcm_pause(substream
, 0);
1584 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1585 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1586 snd_pcm_stream_unlock_irq(substream
);
1592 static bool is_pcm_file(struct file
*file
)
1594 struct inode
*inode
= file_inode(file
);
1597 if (!S_ISCHR(inode
->i_mode
) || imajor(inode
) != snd_major
)
1599 minor
= iminor(inode
);
1600 return snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_PLAYBACK
) ||
1601 snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
1607 static int snd_pcm_link(struct snd_pcm_substream
*substream
, int fd
)
1610 struct snd_pcm_file
*pcm_file
;
1611 struct snd_pcm_substream
*substream1
;
1612 struct snd_pcm_group
*group
;
1613 struct fd f
= fdget(fd
);
1617 if (!is_pcm_file(f
.file
)) {
1621 pcm_file
= f
.file
->private_data
;
1622 substream1
= pcm_file
->substream
;
1623 group
= kmalloc(sizeof(*group
), GFP_KERNEL
);
1628 down_write(&snd_pcm_link_rwsem
);
1629 write_lock_irq(&snd_pcm_link_rwlock
);
1630 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1631 substream
->runtime
->status
->state
!= substream1
->runtime
->status
->state
) {
1635 if (snd_pcm_stream_linked(substream1
)) {
1639 if (!snd_pcm_stream_linked(substream
)) {
1640 substream
->group
= group
;
1642 spin_lock_init(&substream
->group
->lock
);
1643 INIT_LIST_HEAD(&substream
->group
->substreams
);
1644 list_add_tail(&substream
->link_list
, &substream
->group
->substreams
);
1645 substream
->group
->count
= 1;
1647 list_add_tail(&substream1
->link_list
, &substream
->group
->substreams
);
1648 substream
->group
->count
++;
1649 substream1
->group
= substream
->group
;
1651 write_unlock_irq(&snd_pcm_link_rwlock
);
1652 up_write(&snd_pcm_link_rwsem
);
1654 snd_card_unref(substream1
->pcm
->card
);
1661 static void relink_to_local(struct snd_pcm_substream
*substream
)
1663 substream
->group
= &substream
->self_group
;
1664 INIT_LIST_HEAD(&substream
->self_group
.substreams
);
1665 list_add_tail(&substream
->link_list
, &substream
->self_group
.substreams
);
1668 static int snd_pcm_unlink(struct snd_pcm_substream
*substream
)
1670 struct snd_pcm_substream
*s
;
1673 down_write(&snd_pcm_link_rwsem
);
1674 write_lock_irq(&snd_pcm_link_rwlock
);
1675 if (!snd_pcm_stream_linked(substream
)) {
1679 list_del(&substream
->link_list
);
1680 substream
->group
->count
--;
1681 if (substream
->group
->count
== 1) { /* detach the last stream, too */
1682 snd_pcm_group_for_each_entry(s
, substream
) {
1686 kfree(substream
->group
);
1688 relink_to_local(substream
);
1690 write_unlock_irq(&snd_pcm_link_rwlock
);
1691 up_write(&snd_pcm_link_rwsem
);
1698 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params
*params
,
1699 struct snd_pcm_hw_rule
*rule
)
1701 struct snd_interval t
;
1702 snd_interval_mul(hw_param_interval_c(params
, rule
->deps
[0]),
1703 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1704 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1707 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params
*params
,
1708 struct snd_pcm_hw_rule
*rule
)
1710 struct snd_interval t
;
1711 snd_interval_div(hw_param_interval_c(params
, rule
->deps
[0]),
1712 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1713 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1716 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params
*params
,
1717 struct snd_pcm_hw_rule
*rule
)
1719 struct snd_interval t
;
1720 snd_interval_muldivk(hw_param_interval_c(params
, rule
->deps
[0]),
1721 hw_param_interval_c(params
, rule
->deps
[1]),
1722 (unsigned long) rule
->private, &t
);
1723 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1726 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params
*params
,
1727 struct snd_pcm_hw_rule
*rule
)
1729 struct snd_interval t
;
1730 snd_interval_mulkdiv(hw_param_interval_c(params
, rule
->deps
[0]),
1731 (unsigned long) rule
->private,
1732 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1733 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1736 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params
*params
,
1737 struct snd_pcm_hw_rule
*rule
)
1740 struct snd_interval
*i
= hw_param_interval(params
, rule
->deps
[0]);
1742 struct snd_mask
*mask
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1744 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1746 if (! snd_mask_test(mask
, k
))
1748 bits
= snd_pcm_format_physical_width(k
);
1750 continue; /* ignore invalid formats */
1751 if ((unsigned)bits
< i
->min
|| (unsigned)bits
> i
->max
)
1752 snd_mask_reset(&m
, k
);
1754 return snd_mask_refine(mask
, &m
);
1757 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params
*params
,
1758 struct snd_pcm_hw_rule
*rule
)
1760 struct snd_interval t
;
1766 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1768 if (! snd_mask_test(hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
), k
))
1770 bits
= snd_pcm_format_physical_width(k
);
1772 continue; /* ignore invalid formats */
1773 if (t
.min
> (unsigned)bits
)
1775 if (t
.max
< (unsigned)bits
)
1779 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1782 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1783 #error "Change this table"
1786 static unsigned int rates
[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1787 48000, 64000, 88200, 96000, 176400, 192000 };
1789 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates
= {
1790 .count
= ARRAY_SIZE(rates
),
1794 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params
*params
,
1795 struct snd_pcm_hw_rule
*rule
)
1797 struct snd_pcm_hardware
*hw
= rule
->private;
1798 return snd_interval_list(hw_param_interval(params
, rule
->var
),
1799 snd_pcm_known_rates
.count
,
1800 snd_pcm_known_rates
.list
, 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
);
1963 err
= snd_pcm_hw_constraint_mask64(runtime
, SNDRV_PCM_HW_PARAM_FORMAT
, hw
->formats
);
1967 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_SUBFORMAT
, 1 << SNDRV_PCM_SUBFORMAT_STD
);
1971 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_CHANNELS
,
1972 hw
->channels_min
, hw
->channels_max
);
1976 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_RATE
,
1977 hw
->rate_min
, hw
->rate_max
);
1981 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1982 hw
->period_bytes_min
, hw
->period_bytes_max
);
1986 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIODS
,
1987 hw
->periods_min
, hw
->periods_max
);
1991 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1992 hw
->period_bytes_min
, hw
->buffer_bytes_max
);
1996 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1997 snd_pcm_hw_rule_buffer_bytes_max
, substream
,
1998 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, -1);
2003 if (runtime
->dma_bytes
) {
2004 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, 0, runtime
->dma_bytes
);
2009 if (!(hw
->rates
& (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))) {
2010 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
2011 snd_pcm_hw_rule_rate
, hw
,
2012 SNDRV_PCM_HW_PARAM_RATE
, -1);
2017 /* FIXME: this belong to lowlevel */
2018 snd_pcm_hw_constraint_integer(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
);
2023 static void pcm_release_private(struct snd_pcm_substream
*substream
)
2025 snd_pcm_unlink(substream
);
2028 void snd_pcm_release_substream(struct snd_pcm_substream
*substream
)
2030 substream
->ref_count
--;
2031 if (substream
->ref_count
> 0)
2034 snd_pcm_drop(substream
);
2035 if (substream
->hw_opened
) {
2036 if (substream
->ops
->hw_free
!= NULL
)
2037 substream
->ops
->hw_free(substream
);
2038 substream
->ops
->close(substream
);
2039 substream
->hw_opened
= 0;
2041 if (pm_qos_request_active(&substream
->latency_pm_qos_req
))
2042 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
2043 if (substream
->pcm_release
) {
2044 substream
->pcm_release(substream
);
2045 substream
->pcm_release
= NULL
;
2047 snd_pcm_detach_substream(substream
);
2050 EXPORT_SYMBOL(snd_pcm_release_substream
);
2052 int snd_pcm_open_substream(struct snd_pcm
*pcm
, int stream
,
2054 struct snd_pcm_substream
**rsubstream
)
2056 struct snd_pcm_substream
*substream
;
2059 err
= snd_pcm_attach_substream(pcm
, stream
, file
, &substream
);
2062 if (substream
->ref_count
> 1) {
2063 *rsubstream
= substream
;
2067 err
= snd_pcm_hw_constraints_init(substream
);
2069 snd_printd("snd_pcm_hw_constraints_init failed\n");
2073 if ((err
= substream
->ops
->open(substream
)) < 0)
2076 substream
->hw_opened
= 1;
2078 err
= snd_pcm_hw_constraints_complete(substream
);
2080 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2084 *rsubstream
= substream
;
2088 snd_pcm_release_substream(substream
);
2092 EXPORT_SYMBOL(snd_pcm_open_substream
);
2094 static int snd_pcm_open_file(struct file
*file
,
2095 struct snd_pcm
*pcm
,
2098 struct snd_pcm_file
*pcm_file
;
2099 struct snd_pcm_substream
*substream
;
2102 err
= snd_pcm_open_substream(pcm
, stream
, file
, &substream
);
2106 pcm_file
= kzalloc(sizeof(*pcm_file
), GFP_KERNEL
);
2107 if (pcm_file
== NULL
) {
2108 snd_pcm_release_substream(substream
);
2111 pcm_file
->substream
= substream
;
2112 if (substream
->ref_count
== 1) {
2113 substream
->file
= pcm_file
;
2114 substream
->pcm_release
= pcm_release_private
;
2116 file
->private_data
= pcm_file
;
2121 static int snd_pcm_playback_open(struct inode
*inode
, struct file
*file
)
2123 struct snd_pcm
*pcm
;
2124 int err
= nonseekable_open(inode
, file
);
2127 pcm
= snd_lookup_minor_data(iminor(inode
),
2128 SNDRV_DEVICE_TYPE_PCM_PLAYBACK
);
2129 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_PLAYBACK
);
2131 snd_card_unref(pcm
->card
);
2135 static int snd_pcm_capture_open(struct inode
*inode
, struct file
*file
)
2137 struct snd_pcm
*pcm
;
2138 int err
= nonseekable_open(inode
, file
);
2141 pcm
= snd_lookup_minor_data(iminor(inode
),
2142 SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
2143 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_CAPTURE
);
2145 snd_card_unref(pcm
->card
);
2149 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
)
2158 err
= snd_card_file_add(pcm
->card
, file
);
2161 if (!try_module_get(pcm
->card
->module
)) {
2165 init_waitqueue_entry(&wait
, current
);
2166 add_wait_queue(&pcm
->open_wait
, &wait
);
2167 mutex_lock(&pcm
->open_mutex
);
2169 err
= snd_pcm_open_file(file
, pcm
, stream
);
2172 if (err
== -EAGAIN
) {
2173 if (file
->f_flags
& O_NONBLOCK
) {
2179 set_current_state(TASK_INTERRUPTIBLE
);
2180 mutex_unlock(&pcm
->open_mutex
);
2182 mutex_lock(&pcm
->open_mutex
);
2183 if (pcm
->card
->shutdown
) {
2187 if (signal_pending(current
)) {
2192 remove_wait_queue(&pcm
->open_wait
, &wait
);
2193 mutex_unlock(&pcm
->open_mutex
);
2199 module_put(pcm
->card
->module
);
2201 snd_card_file_remove(pcm
->card
, file
);
2206 static int snd_pcm_release(struct inode
*inode
, struct file
*file
)
2208 struct snd_pcm
*pcm
;
2209 struct snd_pcm_substream
*substream
;
2210 struct snd_pcm_file
*pcm_file
;
2212 pcm_file
= file
->private_data
;
2213 substream
= pcm_file
->substream
;
2214 if (snd_BUG_ON(!substream
))
2216 pcm
= substream
->pcm
;
2217 mutex_lock(&pcm
->open_mutex
);
2218 snd_pcm_release_substream(substream
);
2220 mutex_unlock(&pcm
->open_mutex
);
2221 wake_up(&pcm
->open_wait
);
2222 module_put(pcm
->card
->module
);
2223 snd_card_file_remove(pcm
->card
, file
);
2227 static snd_pcm_sframes_t
snd_pcm_playback_rewind(struct snd_pcm_substream
*substream
,
2228 snd_pcm_uframes_t frames
)
2230 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2231 snd_pcm_sframes_t appl_ptr
;
2232 snd_pcm_sframes_t ret
;
2233 snd_pcm_sframes_t hw_avail
;
2238 snd_pcm_stream_lock_irq(substream
);
2239 switch (runtime
->status
->state
) {
2240 case SNDRV_PCM_STATE_PREPARED
:
2242 case SNDRV_PCM_STATE_DRAINING
:
2243 case SNDRV_PCM_STATE_RUNNING
:
2244 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2247 case SNDRV_PCM_STATE_XRUN
:
2250 case SNDRV_PCM_STATE_SUSPENDED
:
2258 hw_avail
= snd_pcm_playback_hw_avail(runtime
);
2259 if (hw_avail
<= 0) {
2263 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2265 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2267 appl_ptr
+= runtime
->boundary
;
2268 runtime
->control
->appl_ptr
= appl_ptr
;
2271 snd_pcm_stream_unlock_irq(substream
);
2275 static snd_pcm_sframes_t
snd_pcm_capture_rewind(struct snd_pcm_substream
*substream
,
2276 snd_pcm_uframes_t frames
)
2278 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2279 snd_pcm_sframes_t appl_ptr
;
2280 snd_pcm_sframes_t ret
;
2281 snd_pcm_sframes_t hw_avail
;
2286 snd_pcm_stream_lock_irq(substream
);
2287 switch (runtime
->status
->state
) {
2288 case SNDRV_PCM_STATE_PREPARED
:
2289 case SNDRV_PCM_STATE_DRAINING
:
2291 case SNDRV_PCM_STATE_RUNNING
:
2292 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2295 case SNDRV_PCM_STATE_XRUN
:
2298 case SNDRV_PCM_STATE_SUSPENDED
:
2306 hw_avail
= snd_pcm_capture_hw_avail(runtime
);
2307 if (hw_avail
<= 0) {
2311 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2313 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2315 appl_ptr
+= runtime
->boundary
;
2316 runtime
->control
->appl_ptr
= appl_ptr
;
2319 snd_pcm_stream_unlock_irq(substream
);
2323 static snd_pcm_sframes_t
snd_pcm_playback_forward(struct snd_pcm_substream
*substream
,
2324 snd_pcm_uframes_t frames
)
2326 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2327 snd_pcm_sframes_t appl_ptr
;
2328 snd_pcm_sframes_t ret
;
2329 snd_pcm_sframes_t avail
;
2334 snd_pcm_stream_lock_irq(substream
);
2335 switch (runtime
->status
->state
) {
2336 case SNDRV_PCM_STATE_PREPARED
:
2337 case SNDRV_PCM_STATE_PAUSED
:
2339 case SNDRV_PCM_STATE_DRAINING
:
2340 case SNDRV_PCM_STATE_RUNNING
:
2341 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2344 case SNDRV_PCM_STATE_XRUN
:
2347 case SNDRV_PCM_STATE_SUSPENDED
:
2355 avail
= snd_pcm_playback_avail(runtime
);
2360 if (frames
> (snd_pcm_uframes_t
)avail
)
2362 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2363 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2364 appl_ptr
-= runtime
->boundary
;
2365 runtime
->control
->appl_ptr
= appl_ptr
;
2368 snd_pcm_stream_unlock_irq(substream
);
2372 static snd_pcm_sframes_t
snd_pcm_capture_forward(struct snd_pcm_substream
*substream
,
2373 snd_pcm_uframes_t frames
)
2375 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2376 snd_pcm_sframes_t appl_ptr
;
2377 snd_pcm_sframes_t ret
;
2378 snd_pcm_sframes_t avail
;
2383 snd_pcm_stream_lock_irq(substream
);
2384 switch (runtime
->status
->state
) {
2385 case SNDRV_PCM_STATE_PREPARED
:
2386 case SNDRV_PCM_STATE_DRAINING
:
2387 case SNDRV_PCM_STATE_PAUSED
:
2389 case SNDRV_PCM_STATE_RUNNING
:
2390 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2393 case SNDRV_PCM_STATE_XRUN
:
2396 case SNDRV_PCM_STATE_SUSPENDED
:
2404 avail
= snd_pcm_capture_avail(runtime
);
2409 if (frames
> (snd_pcm_uframes_t
)avail
)
2411 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2412 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2413 appl_ptr
-= runtime
->boundary
;
2414 runtime
->control
->appl_ptr
= appl_ptr
;
2417 snd_pcm_stream_unlock_irq(substream
);
2421 static int snd_pcm_hwsync(struct snd_pcm_substream
*substream
)
2423 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2426 snd_pcm_stream_lock_irq(substream
);
2427 switch (runtime
->status
->state
) {
2428 case SNDRV_PCM_STATE_DRAINING
:
2429 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2431 case SNDRV_PCM_STATE_RUNNING
:
2432 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2435 case SNDRV_PCM_STATE_PREPARED
:
2436 case SNDRV_PCM_STATE_SUSPENDED
:
2439 case SNDRV_PCM_STATE_XRUN
:
2447 snd_pcm_stream_unlock_irq(substream
);
2451 static int snd_pcm_delay(struct snd_pcm_substream
*substream
,
2452 snd_pcm_sframes_t __user
*res
)
2454 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2456 snd_pcm_sframes_t n
= 0;
2458 snd_pcm_stream_lock_irq(substream
);
2459 switch (runtime
->status
->state
) {
2460 case SNDRV_PCM_STATE_DRAINING
:
2461 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2463 case SNDRV_PCM_STATE_RUNNING
:
2464 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2467 case SNDRV_PCM_STATE_PREPARED
:
2468 case SNDRV_PCM_STATE_SUSPENDED
:
2470 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2471 n
= snd_pcm_playback_hw_avail(runtime
);
2473 n
= snd_pcm_capture_avail(runtime
);
2474 n
+= runtime
->delay
;
2476 case SNDRV_PCM_STATE_XRUN
:
2484 snd_pcm_stream_unlock_irq(substream
);
2486 if (put_user(n
, res
))
2491 static int snd_pcm_sync_ptr(struct snd_pcm_substream
*substream
,
2492 struct snd_pcm_sync_ptr __user
*_sync_ptr
)
2494 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2495 struct snd_pcm_sync_ptr sync_ptr
;
2496 volatile struct snd_pcm_mmap_status
*status
;
2497 volatile struct snd_pcm_mmap_control
*control
;
2500 memset(&sync_ptr
, 0, sizeof(sync_ptr
));
2501 if (get_user(sync_ptr
.flags
, (unsigned __user
*)&(_sync_ptr
->flags
)))
2503 if (copy_from_user(&sync_ptr
.c
.control
, &(_sync_ptr
->c
.control
), sizeof(struct snd_pcm_mmap_control
)))
2505 status
= runtime
->status
;
2506 control
= runtime
->control
;
2507 if (sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_HWSYNC
) {
2508 err
= snd_pcm_hwsync(substream
);
2512 snd_pcm_stream_lock_irq(substream
);
2513 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_APPL
))
2514 control
->appl_ptr
= sync_ptr
.c
.control
.appl_ptr
;
2516 sync_ptr
.c
.control
.appl_ptr
= control
->appl_ptr
;
2517 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_AVAIL_MIN
))
2518 control
->avail_min
= sync_ptr
.c
.control
.avail_min
;
2520 sync_ptr
.c
.control
.avail_min
= control
->avail_min
;
2521 sync_ptr
.s
.status
.state
= status
->state
;
2522 sync_ptr
.s
.status
.hw_ptr
= status
->hw_ptr
;
2523 sync_ptr
.s
.status
.tstamp
= status
->tstamp
;
2524 sync_ptr
.s
.status
.suspended_state
= status
->suspended_state
;
2525 snd_pcm_stream_unlock_irq(substream
);
2526 if (copy_to_user(_sync_ptr
, &sync_ptr
, sizeof(sync_ptr
)))
2531 static int snd_pcm_tstamp(struct snd_pcm_substream
*substream
, int __user
*_arg
)
2533 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2536 if (get_user(arg
, _arg
))
2538 if (arg
< 0 || arg
> SNDRV_PCM_TSTAMP_TYPE_LAST
)
2540 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY
;
2541 if (arg
== SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
)
2542 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
;
2546 static int snd_pcm_common_ioctl1(struct file
*file
,
2547 struct snd_pcm_substream
*substream
,
2548 unsigned int cmd
, void __user
*arg
)
2551 case SNDRV_PCM_IOCTL_PVERSION
:
2552 return put_user(SNDRV_PCM_VERSION
, (int __user
*)arg
) ? -EFAULT
: 0;
2553 case SNDRV_PCM_IOCTL_INFO
:
2554 return snd_pcm_info_user(substream
, arg
);
2555 case SNDRV_PCM_IOCTL_TSTAMP
: /* just for compatibility */
2557 case SNDRV_PCM_IOCTL_TTSTAMP
:
2558 return snd_pcm_tstamp(substream
, arg
);
2559 case SNDRV_PCM_IOCTL_HW_REFINE
:
2560 return snd_pcm_hw_refine_user(substream
, arg
);
2561 case SNDRV_PCM_IOCTL_HW_PARAMS
:
2562 return snd_pcm_hw_params_user(substream
, arg
);
2563 case SNDRV_PCM_IOCTL_HW_FREE
:
2564 return snd_pcm_hw_free(substream
);
2565 case SNDRV_PCM_IOCTL_SW_PARAMS
:
2566 return snd_pcm_sw_params_user(substream
, arg
);
2567 case SNDRV_PCM_IOCTL_STATUS
:
2568 return snd_pcm_status_user(substream
, arg
);
2569 case SNDRV_PCM_IOCTL_CHANNEL_INFO
:
2570 return snd_pcm_channel_info_user(substream
, arg
);
2571 case SNDRV_PCM_IOCTL_PREPARE
:
2572 return snd_pcm_prepare(substream
, file
);
2573 case SNDRV_PCM_IOCTL_RESET
:
2574 return snd_pcm_reset(substream
);
2575 case SNDRV_PCM_IOCTL_START
:
2576 return snd_pcm_action_lock_irq(&snd_pcm_action_start
, substream
, SNDRV_PCM_STATE_RUNNING
);
2577 case SNDRV_PCM_IOCTL_LINK
:
2578 return snd_pcm_link(substream
, (int)(unsigned long) arg
);
2579 case SNDRV_PCM_IOCTL_UNLINK
:
2580 return snd_pcm_unlink(substream
);
2581 case SNDRV_PCM_IOCTL_RESUME
:
2582 return snd_pcm_resume(substream
);
2583 case SNDRV_PCM_IOCTL_XRUN
:
2584 return snd_pcm_xrun(substream
);
2585 case SNDRV_PCM_IOCTL_HWSYNC
:
2586 return snd_pcm_hwsync(substream
);
2587 case SNDRV_PCM_IOCTL_DELAY
:
2588 return snd_pcm_delay(substream
, arg
);
2589 case SNDRV_PCM_IOCTL_SYNC_PTR
:
2590 return snd_pcm_sync_ptr(substream
, arg
);
2591 #ifdef CONFIG_SND_SUPPORT_OLD_API
2592 case SNDRV_PCM_IOCTL_HW_REFINE_OLD
:
2593 return snd_pcm_hw_refine_old_user(substream
, arg
);
2594 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD
:
2595 return snd_pcm_hw_params_old_user(substream
, arg
);
2597 case SNDRV_PCM_IOCTL_DRAIN
:
2598 return snd_pcm_drain(substream
, file
);
2599 case SNDRV_PCM_IOCTL_DROP
:
2600 return snd_pcm_drop(substream
);
2601 case SNDRV_PCM_IOCTL_PAUSE
:
2604 snd_pcm_stream_lock_irq(substream
);
2605 res
= snd_pcm_pause(substream
, (int)(unsigned long)arg
);
2606 snd_pcm_stream_unlock_irq(substream
);
2610 snd_printd("unknown ioctl = 0x%x\n", cmd
);
2614 static int snd_pcm_playback_ioctl1(struct file
*file
,
2615 struct snd_pcm_substream
*substream
,
2616 unsigned int cmd
, void __user
*arg
)
2618 if (snd_BUG_ON(!substream
))
2620 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
2623 case SNDRV_PCM_IOCTL_WRITEI_FRAMES
:
2625 struct snd_xferi xferi
;
2626 struct snd_xferi __user
*_xferi
= arg
;
2627 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2628 snd_pcm_sframes_t result
;
2629 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2631 if (put_user(0, &_xferi
->result
))
2633 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2635 result
= snd_pcm_lib_write(substream
, xferi
.buf
, xferi
.frames
);
2636 __put_user(result
, &_xferi
->result
);
2637 return result
< 0 ? result
: 0;
2639 case SNDRV_PCM_IOCTL_WRITEN_FRAMES
:
2641 struct snd_xfern xfern
;
2642 struct snd_xfern __user
*_xfern
= arg
;
2643 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2645 snd_pcm_sframes_t result
;
2646 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2648 if (runtime
->channels
> 128)
2650 if (put_user(0, &_xfern
->result
))
2652 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2655 bufs
= memdup_user(xfern
.bufs
,
2656 sizeof(void *) * runtime
->channels
);
2658 return PTR_ERR(bufs
);
2659 result
= snd_pcm_lib_writev(substream
, bufs
, xfern
.frames
);
2661 __put_user(result
, &_xfern
->result
);
2662 return result
< 0 ? result
: 0;
2664 case SNDRV_PCM_IOCTL_REWIND
:
2666 snd_pcm_uframes_t frames
;
2667 snd_pcm_uframes_t __user
*_frames
= arg
;
2668 snd_pcm_sframes_t result
;
2669 if (get_user(frames
, _frames
))
2671 if (put_user(0, _frames
))
2673 result
= snd_pcm_playback_rewind(substream
, frames
);
2674 __put_user(result
, _frames
);
2675 return result
< 0 ? result
: 0;
2677 case SNDRV_PCM_IOCTL_FORWARD
:
2679 snd_pcm_uframes_t frames
;
2680 snd_pcm_uframes_t __user
*_frames
= arg
;
2681 snd_pcm_sframes_t result
;
2682 if (get_user(frames
, _frames
))
2684 if (put_user(0, _frames
))
2686 result
= snd_pcm_playback_forward(substream
, frames
);
2687 __put_user(result
, _frames
);
2688 return result
< 0 ? result
: 0;
2691 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2694 static int snd_pcm_capture_ioctl1(struct file
*file
,
2695 struct snd_pcm_substream
*substream
,
2696 unsigned int cmd
, void __user
*arg
)
2698 if (snd_BUG_ON(!substream
))
2700 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_CAPTURE
))
2703 case SNDRV_PCM_IOCTL_READI_FRAMES
:
2705 struct snd_xferi xferi
;
2706 struct snd_xferi __user
*_xferi
= arg
;
2707 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2708 snd_pcm_sframes_t result
;
2709 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2711 if (put_user(0, &_xferi
->result
))
2713 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2715 result
= snd_pcm_lib_read(substream
, xferi
.buf
, xferi
.frames
);
2716 __put_user(result
, &_xferi
->result
);
2717 return result
< 0 ? result
: 0;
2719 case SNDRV_PCM_IOCTL_READN_FRAMES
:
2721 struct snd_xfern xfern
;
2722 struct snd_xfern __user
*_xfern
= arg
;
2723 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2725 snd_pcm_sframes_t result
;
2726 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2728 if (runtime
->channels
> 128)
2730 if (put_user(0, &_xfern
->result
))
2732 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2735 bufs
= memdup_user(xfern
.bufs
,
2736 sizeof(void *) * runtime
->channels
);
2738 return PTR_ERR(bufs
);
2739 result
= snd_pcm_lib_readv(substream
, bufs
, xfern
.frames
);
2741 __put_user(result
, &_xfern
->result
);
2742 return result
< 0 ? result
: 0;
2744 case SNDRV_PCM_IOCTL_REWIND
:
2746 snd_pcm_uframes_t frames
;
2747 snd_pcm_uframes_t __user
*_frames
= arg
;
2748 snd_pcm_sframes_t result
;
2749 if (get_user(frames
, _frames
))
2751 if (put_user(0, _frames
))
2753 result
= snd_pcm_capture_rewind(substream
, frames
);
2754 __put_user(result
, _frames
);
2755 return result
< 0 ? result
: 0;
2757 case SNDRV_PCM_IOCTL_FORWARD
:
2759 snd_pcm_uframes_t frames
;
2760 snd_pcm_uframes_t __user
*_frames
= arg
;
2761 snd_pcm_sframes_t result
;
2762 if (get_user(frames
, _frames
))
2764 if (put_user(0, _frames
))
2766 result
= snd_pcm_capture_forward(substream
, frames
);
2767 __put_user(result
, _frames
);
2768 return result
< 0 ? result
: 0;
2771 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2774 static long snd_pcm_playback_ioctl(struct file
*file
, unsigned int cmd
,
2777 struct snd_pcm_file
*pcm_file
;
2779 pcm_file
= file
->private_data
;
2781 if (((cmd
>> 8) & 0xff) != 'A')
2784 return snd_pcm_playback_ioctl1(file
, pcm_file
->substream
, cmd
,
2785 (void __user
*)arg
);
2788 static long snd_pcm_capture_ioctl(struct file
*file
, unsigned int cmd
,
2791 struct snd_pcm_file
*pcm_file
;
2793 pcm_file
= file
->private_data
;
2795 if (((cmd
>> 8) & 0xff) != 'A')
2798 return snd_pcm_capture_ioctl1(file
, pcm_file
->substream
, cmd
,
2799 (void __user
*)arg
);
2802 int snd_pcm_kernel_ioctl(struct snd_pcm_substream
*substream
,
2803 unsigned int cmd
, void *arg
)
2808 fs
= snd_enter_user();
2809 switch (substream
->stream
) {
2810 case SNDRV_PCM_STREAM_PLAYBACK
:
2811 result
= snd_pcm_playback_ioctl1(NULL
, substream
, cmd
,
2812 (void __user
*)arg
);
2814 case SNDRV_PCM_STREAM_CAPTURE
:
2815 result
= snd_pcm_capture_ioctl1(NULL
, substream
, cmd
,
2816 (void __user
*)arg
);
2826 EXPORT_SYMBOL(snd_pcm_kernel_ioctl
);
2828 static ssize_t
snd_pcm_read(struct file
*file
, char __user
*buf
, size_t count
,
2831 struct snd_pcm_file
*pcm_file
;
2832 struct snd_pcm_substream
*substream
;
2833 struct snd_pcm_runtime
*runtime
;
2834 snd_pcm_sframes_t result
;
2836 pcm_file
= file
->private_data
;
2837 substream
= pcm_file
->substream
;
2838 if (PCM_RUNTIME_CHECK(substream
))
2840 runtime
= substream
->runtime
;
2841 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2843 if (!frame_aligned(runtime
, count
))
2845 count
= bytes_to_frames(runtime
, count
);
2846 result
= snd_pcm_lib_read(substream
, buf
, count
);
2848 result
= frames_to_bytes(runtime
, result
);
2852 static ssize_t
snd_pcm_write(struct file
*file
, const char __user
*buf
,
2853 size_t count
, loff_t
* offset
)
2855 struct snd_pcm_file
*pcm_file
;
2856 struct snd_pcm_substream
*substream
;
2857 struct snd_pcm_runtime
*runtime
;
2858 snd_pcm_sframes_t result
;
2860 pcm_file
= file
->private_data
;
2861 substream
= pcm_file
->substream
;
2862 if (PCM_RUNTIME_CHECK(substream
))
2864 runtime
= substream
->runtime
;
2865 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2867 if (!frame_aligned(runtime
, count
))
2869 count
= bytes_to_frames(runtime
, count
);
2870 result
= snd_pcm_lib_write(substream
, buf
, count
);
2872 result
= frames_to_bytes(runtime
, result
);
2876 static ssize_t
snd_pcm_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
2877 unsigned long nr_segs
, loff_t pos
)
2880 struct snd_pcm_file
*pcm_file
;
2881 struct snd_pcm_substream
*substream
;
2882 struct snd_pcm_runtime
*runtime
;
2883 snd_pcm_sframes_t result
;
2886 snd_pcm_uframes_t frames
;
2888 pcm_file
= iocb
->ki_filp
->private_data
;
2889 substream
= pcm_file
->substream
;
2890 if (PCM_RUNTIME_CHECK(substream
))
2892 runtime
= substream
->runtime
;
2893 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2895 if (nr_segs
> 1024 || nr_segs
!= runtime
->channels
)
2897 if (!frame_aligned(runtime
, iov
->iov_len
))
2899 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2900 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2903 for (i
= 0; i
< nr_segs
; ++i
)
2904 bufs
[i
] = iov
[i
].iov_base
;
2905 result
= snd_pcm_lib_readv(substream
, bufs
, frames
);
2907 result
= frames_to_bytes(runtime
, result
);
2912 static ssize_t
snd_pcm_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
2913 unsigned long nr_segs
, loff_t pos
)
2915 struct snd_pcm_file
*pcm_file
;
2916 struct snd_pcm_substream
*substream
;
2917 struct snd_pcm_runtime
*runtime
;
2918 snd_pcm_sframes_t result
;
2921 snd_pcm_uframes_t frames
;
2923 pcm_file
= iocb
->ki_filp
->private_data
;
2924 substream
= pcm_file
->substream
;
2925 if (PCM_RUNTIME_CHECK(substream
))
2927 runtime
= substream
->runtime
;
2928 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2930 if (nr_segs
> 128 || nr_segs
!= runtime
->channels
||
2931 !frame_aligned(runtime
, iov
->iov_len
))
2933 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2934 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2937 for (i
= 0; i
< nr_segs
; ++i
)
2938 bufs
[i
] = iov
[i
].iov_base
;
2939 result
= snd_pcm_lib_writev(substream
, bufs
, frames
);
2941 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 if (PCM_RUNTIME_CHECK(substream
))
2959 runtime
= substream
->runtime
;
2961 poll_wait(file
, &runtime
->sleep
, wait
);
2963 snd_pcm_stream_lock_irq(substream
);
2964 avail
= snd_pcm_playback_avail(runtime
);
2965 switch (runtime
->status
->state
) {
2966 case SNDRV_PCM_STATE_RUNNING
:
2967 case SNDRV_PCM_STATE_PREPARED
:
2968 case SNDRV_PCM_STATE_PAUSED
:
2969 if (avail
>= runtime
->control
->avail_min
) {
2970 mask
= POLLOUT
| POLLWRNORM
;
2974 case SNDRV_PCM_STATE_DRAINING
:
2978 mask
= POLLOUT
| POLLWRNORM
| POLLERR
;
2981 snd_pcm_stream_unlock_irq(substream
);
2985 static unsigned int snd_pcm_capture_poll(struct file
*file
, poll_table
* wait
)
2987 struct snd_pcm_file
*pcm_file
;
2988 struct snd_pcm_substream
*substream
;
2989 struct snd_pcm_runtime
*runtime
;
2991 snd_pcm_uframes_t avail
;
2993 pcm_file
= file
->private_data
;
2995 substream
= pcm_file
->substream
;
2996 if (PCM_RUNTIME_CHECK(substream
))
2998 runtime
= substream
->runtime
;
3000 poll_wait(file
, &runtime
->sleep
, wait
);
3002 snd_pcm_stream_lock_irq(substream
);
3003 avail
= snd_pcm_capture_avail(runtime
);
3004 switch (runtime
->status
->state
) {
3005 case SNDRV_PCM_STATE_RUNNING
:
3006 case SNDRV_PCM_STATE_PREPARED
:
3007 case SNDRV_PCM_STATE_PAUSED
:
3008 if (avail
>= runtime
->control
->avail_min
) {
3009 mask
= POLLIN
| POLLRDNORM
;
3014 case SNDRV_PCM_STATE_DRAINING
:
3016 mask
= POLLIN
| POLLRDNORM
;
3021 mask
= POLLIN
| POLLRDNORM
| POLLERR
;
3024 snd_pcm_stream_unlock_irq(substream
);
3033 * Only on coherent architectures, we can mmap the status and the control records
3034 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3036 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3038 * mmap status record
3040 static int snd_pcm_mmap_status_fault(struct vm_area_struct
*area
,
3041 struct vm_fault
*vmf
)
3043 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3044 struct snd_pcm_runtime
*runtime
;
3046 if (substream
== NULL
)
3047 return VM_FAULT_SIGBUS
;
3048 runtime
= substream
->runtime
;
3049 vmf
->page
= virt_to_page(runtime
->status
);
3050 get_page(vmf
->page
);
3054 static const struct vm_operations_struct snd_pcm_vm_ops_status
=
3056 .fault
= snd_pcm_mmap_status_fault
,
3059 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3060 struct vm_area_struct
*area
)
3063 if (!(area
->vm_flags
& VM_READ
))
3065 size
= area
->vm_end
- area
->vm_start
;
3066 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)))
3068 area
->vm_ops
= &snd_pcm_vm_ops_status
;
3069 area
->vm_private_data
= substream
;
3070 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3075 * mmap control record
3077 static int snd_pcm_mmap_control_fault(struct vm_area_struct
*area
,
3078 struct vm_fault
*vmf
)
3080 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3081 struct snd_pcm_runtime
*runtime
;
3083 if (substream
== NULL
)
3084 return VM_FAULT_SIGBUS
;
3085 runtime
= substream
->runtime
;
3086 vmf
->page
= virt_to_page(runtime
->control
);
3087 get_page(vmf
->page
);
3091 static const struct vm_operations_struct snd_pcm_vm_ops_control
=
3093 .fault
= snd_pcm_mmap_control_fault
,
3096 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3097 struct vm_area_struct
*area
)
3100 if (!(area
->vm_flags
& VM_READ
))
3102 size
= area
->vm_end
- area
->vm_start
;
3103 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
)))
3105 area
->vm_ops
= &snd_pcm_vm_ops_control
;
3106 area
->vm_private_data
= substream
;
3107 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3110 #else /* ! coherent mmap */
3112 * don't support mmap for status and control records.
3114 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3115 struct vm_area_struct
*area
)
3119 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3120 struct vm_area_struct
*area
)
3124 #endif /* coherent mmap */
3126 static inline struct page
*
3127 snd_pcm_default_page_ops(struct snd_pcm_substream
*substream
, unsigned long ofs
)
3129 void *vaddr
= substream
->runtime
->dma_area
+ ofs
;
3130 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3131 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3132 return virt_to_page(CAC_ADDR(vaddr
));
3134 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3135 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
) {
3136 dma_addr_t addr
= substream
->runtime
->dma_addr
+ ofs
;
3137 addr
-= get_dma_offset(substream
->dma_buffer
.dev
.dev
);
3138 /* assume dma_handle set via pfn_to_phys() in
3139 * mm/dma-noncoherent.c
3141 return pfn_to_page(addr
>> PAGE_SHIFT
);
3144 return virt_to_page(vaddr
);
3148 * fault callback for mmapping a RAM page
3150 static int snd_pcm_mmap_data_fault(struct vm_area_struct
*area
,
3151 struct vm_fault
*vmf
)
3153 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3154 struct snd_pcm_runtime
*runtime
;
3155 unsigned long offset
;
3159 if (substream
== NULL
)
3160 return VM_FAULT_SIGBUS
;
3161 runtime
= substream
->runtime
;
3162 offset
= vmf
->pgoff
<< PAGE_SHIFT
;
3163 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3164 if (offset
> dma_bytes
- PAGE_SIZE
)
3165 return VM_FAULT_SIGBUS
;
3166 if (substream
->ops
->page
)
3167 page
= substream
->ops
->page(substream
, offset
);
3169 page
= snd_pcm_default_page_ops(substream
, offset
);
3171 return VM_FAULT_SIGBUS
;
3177 static const struct vm_operations_struct snd_pcm_vm_ops_data
= {
3178 .open
= snd_pcm_mmap_data_open
,
3179 .close
= snd_pcm_mmap_data_close
,
3182 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault
= {
3183 .open
= snd_pcm_mmap_data_open
,
3184 .close
= snd_pcm_mmap_data_close
,
3185 .fault
= snd_pcm_mmap_data_fault
,
3188 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3189 /* This should be defined / handled globally! */
3191 #define ARCH_HAS_DMA_MMAP_COHERENT
3196 * mmap the DMA buffer on RAM
3198 int snd_pcm_lib_default_mmap(struct snd_pcm_substream
*substream
,
3199 struct vm_area_struct
*area
)
3201 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3202 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3203 if (!substream
->ops
->page
&&
3204 substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3205 return dma_mmap_coherent(substream
->dma_buffer
.dev
.dev
,
3207 substream
->runtime
->dma_area
,
3208 substream
->runtime
->dma_addr
,
3209 area
->vm_end
- area
->vm_start
);
3210 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3211 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
&&
3212 !plat_device_is_coherent(substream
->dma_buffer
.dev
.dev
))
3213 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3214 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3215 /* mmap with fault handler */
3216 area
->vm_ops
= &snd_pcm_vm_ops_data_fault
;
3219 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap
);
3222 * mmap the DMA buffer on I/O memory area
3224 #if SNDRV_PCM_INFO_MMAP_IOMEM
3225 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream
*substream
,
3226 struct vm_area_struct
*area
)
3228 struct snd_pcm_runtime
*runtime
= substream
->runtime
;;
3230 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3231 return vm_iomap_memory(area
, runtime
->dma_addr
, runtime
->dma_bytes
);
3234 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem
);
3235 #endif /* SNDRV_PCM_INFO_MMAP */
3240 int snd_pcm_mmap_data(struct snd_pcm_substream
*substream
, struct file
*file
,
3241 struct vm_area_struct
*area
)
3243 struct snd_pcm_runtime
*runtime
;
3245 unsigned long offset
;
3249 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
3250 if (!(area
->vm_flags
& (VM_WRITE
|VM_READ
)))
3253 if (!(area
->vm_flags
& VM_READ
))
3256 runtime
= substream
->runtime
;
3257 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3259 if (!(runtime
->info
& SNDRV_PCM_INFO_MMAP
))
3261 if (runtime
->access
== SNDRV_PCM_ACCESS_RW_INTERLEAVED
||
3262 runtime
->access
== SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
)
3264 size
= area
->vm_end
- area
->vm_start
;
3265 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3266 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3267 if ((size_t)size
> dma_bytes
)
3269 if (offset
> dma_bytes
- size
)
3272 area
->vm_ops
= &snd_pcm_vm_ops_data
;
3273 area
->vm_private_data
= substream
;
3274 if (substream
->ops
->mmap
)
3275 err
= substream
->ops
->mmap(substream
, area
);
3277 err
= snd_pcm_lib_default_mmap(substream
, area
);
3279 atomic_inc(&substream
->mmap_count
);
3283 EXPORT_SYMBOL(snd_pcm_mmap_data
);
3285 static int snd_pcm_mmap(struct file
*file
, struct vm_area_struct
*area
)
3287 struct snd_pcm_file
* pcm_file
;
3288 struct snd_pcm_substream
*substream
;
3289 unsigned long offset
;
3291 pcm_file
= file
->private_data
;
3292 substream
= pcm_file
->substream
;
3293 if (PCM_RUNTIME_CHECK(substream
))
3296 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3298 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3299 if (pcm_file
->no_compat_mmap
)
3301 return snd_pcm_mmap_status(substream
, file
, area
);
3302 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3303 if (pcm_file
->no_compat_mmap
)
3305 return snd_pcm_mmap_control(substream
, file
, area
);
3307 return snd_pcm_mmap_data(substream
, file
, area
);
3312 static int snd_pcm_fasync(int fd
, struct file
* file
, int on
)
3314 struct snd_pcm_file
* pcm_file
;
3315 struct snd_pcm_substream
*substream
;
3316 struct snd_pcm_runtime
*runtime
;
3318 pcm_file
= file
->private_data
;
3319 substream
= pcm_file
->substream
;
3320 if (PCM_RUNTIME_CHECK(substream
))
3322 runtime
= substream
->runtime
;
3323 return fasync_helper(fd
, file
, on
, &runtime
->fasync
);
3329 #ifdef CONFIG_COMPAT
3330 #include "pcm_compat.c"
3332 #define snd_pcm_ioctl_compat NULL
3336 * To be removed helpers to keep binary compatibility
3339 #ifdef CONFIG_SND_SUPPORT_OLD_API
3340 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3341 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3343 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params
*params
,
3344 struct snd_pcm_hw_params_old
*oparams
)
3348 memset(params
, 0, sizeof(*params
));
3349 params
->flags
= oparams
->flags
;
3350 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3351 params
->masks
[i
].bits
[0] = oparams
->masks
[i
];
3352 memcpy(params
->intervals
, oparams
->intervals
, sizeof(oparams
->intervals
));
3353 params
->rmask
= __OLD_TO_NEW_MASK(oparams
->rmask
);
3354 params
->cmask
= __OLD_TO_NEW_MASK(oparams
->cmask
);
3355 params
->info
= oparams
->info
;
3356 params
->msbits
= oparams
->msbits
;
3357 params
->rate_num
= oparams
->rate_num
;
3358 params
->rate_den
= oparams
->rate_den
;
3359 params
->fifo_size
= oparams
->fifo_size
;
3362 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old
*oparams
,
3363 struct snd_pcm_hw_params
*params
)
3367 memset(oparams
, 0, sizeof(*oparams
));
3368 oparams
->flags
= params
->flags
;
3369 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3370 oparams
->masks
[i
] = params
->masks
[i
].bits
[0];
3371 memcpy(oparams
->intervals
, params
->intervals
, sizeof(oparams
->intervals
));
3372 oparams
->rmask
= __NEW_TO_OLD_MASK(params
->rmask
);
3373 oparams
->cmask
= __NEW_TO_OLD_MASK(params
->cmask
);
3374 oparams
->info
= params
->info
;
3375 oparams
->msbits
= params
->msbits
;
3376 oparams
->rate_num
= params
->rate_num
;
3377 oparams
->rate_den
= params
->rate_den
;
3378 oparams
->fifo_size
= params
->fifo_size
;
3381 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
3382 struct snd_pcm_hw_params_old __user
* _oparams
)
3384 struct snd_pcm_hw_params
*params
;
3385 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3388 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3392 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3393 if (IS_ERR(oparams
)) {
3394 err
= PTR_ERR(oparams
);
3397 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3398 err
= snd_pcm_hw_refine(substream
, params
);
3399 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3400 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3411 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
3412 struct snd_pcm_hw_params_old __user
* _oparams
)
3414 struct snd_pcm_hw_params
*params
;
3415 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3418 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3422 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3423 if (IS_ERR(oparams
)) {
3424 err
= PTR_ERR(oparams
);
3427 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3428 err
= snd_pcm_hw_params(substream
, params
);
3429 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3430 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3440 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3443 static unsigned long snd_pcm_get_unmapped_area(struct file
*file
,
3446 unsigned long pgoff
,
3447 unsigned long flags
)
3449 struct snd_pcm_file
*pcm_file
= file
->private_data
;
3450 struct snd_pcm_substream
*substream
= pcm_file
->substream
;
3451 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
3452 unsigned long offset
= pgoff
<< PAGE_SHIFT
;
3455 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3456 return (unsigned long)runtime
->status
;
3457 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3458 return (unsigned long)runtime
->control
;
3460 return (unsigned long)runtime
->dma_area
+ offset
;
3464 # define snd_pcm_get_unmapped_area NULL
3471 const struct file_operations snd_pcm_f_ops
[2] = {
3473 .owner
= THIS_MODULE
,
3474 .write
= snd_pcm_write
,
3475 .aio_write
= snd_pcm_aio_write
,
3476 .open
= snd_pcm_playback_open
,
3477 .release
= snd_pcm_release
,
3478 .llseek
= no_llseek
,
3479 .poll
= snd_pcm_playback_poll
,
3480 .unlocked_ioctl
= snd_pcm_playback_ioctl
,
3481 .compat_ioctl
= snd_pcm_ioctl_compat
,
3482 .mmap
= snd_pcm_mmap
,
3483 .fasync
= snd_pcm_fasync
,
3484 .get_unmapped_area
= snd_pcm_get_unmapped_area
,
3487 .owner
= THIS_MODULE
,
3488 .read
= snd_pcm_read
,
3489 .aio_read
= snd_pcm_aio_read
,
3490 .open
= snd_pcm_capture_open
,
3491 .release
= snd_pcm_release
,
3492 .llseek
= no_llseek
,
3493 .poll
= snd_pcm_capture_poll
,
3494 .unlocked_ioctl
= snd_pcm_capture_ioctl
,
3495 .compat_ioctl
= snd_pcm_ioctl_compat
,
3496 .mmap
= snd_pcm_mmap
,
3497 .fasync
= snd_pcm_fasync
,
3498 .get_unmapped_area
= snd_pcm_get_unmapped_area
,