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/uio.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 int snd_pcm_start(struct snd_pcm_substream
*substream
)
904 return snd_pcm_action(&snd_pcm_action_start
, substream
,
905 SNDRV_PCM_STATE_RUNNING
);
911 static int snd_pcm_pre_stop(struct snd_pcm_substream
*substream
, int state
)
913 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
914 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
916 runtime
->trigger_master
= substream
;
920 static int snd_pcm_do_stop(struct snd_pcm_substream
*substream
, int state
)
922 if (substream
->runtime
->trigger_master
== substream
&&
923 snd_pcm_running(substream
))
924 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
925 return 0; /* unconditonally stop all substreams */
928 static void snd_pcm_post_stop(struct snd_pcm_substream
*substream
, int state
)
930 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
931 if (runtime
->status
->state
!= state
) {
932 snd_pcm_trigger_tstamp(substream
);
933 if (substream
->timer
)
934 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTOP
,
935 &runtime
->trigger_tstamp
);
936 runtime
->status
->state
= state
;
938 wake_up(&runtime
->sleep
);
939 wake_up(&runtime
->tsleep
);
942 static struct action_ops snd_pcm_action_stop
= {
943 .pre_action
= snd_pcm_pre_stop
,
944 .do_action
= snd_pcm_do_stop
,
945 .post_action
= snd_pcm_post_stop
949 * snd_pcm_stop - try to stop all running streams in the substream group
950 * @substream: the PCM substream instance
951 * @state: PCM state after stopping the stream
953 * The state of each stream is then changed to the given state unconditionally.
955 int snd_pcm_stop(struct snd_pcm_substream
*substream
, snd_pcm_state_t state
)
957 return snd_pcm_action(&snd_pcm_action_stop
, substream
, state
);
960 EXPORT_SYMBOL(snd_pcm_stop
);
963 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
964 * @substream: the PCM substream
966 * After stopping, the state is changed to SETUP.
967 * Unlike snd_pcm_stop(), this affects only the given stream.
969 int snd_pcm_drain_done(struct snd_pcm_substream
*substream
)
971 return snd_pcm_action_single(&snd_pcm_action_stop
, substream
,
972 SNDRV_PCM_STATE_SETUP
);
978 static int snd_pcm_pre_pause(struct snd_pcm_substream
*substream
, int push
)
980 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
981 if (!(runtime
->info
& SNDRV_PCM_INFO_PAUSE
))
984 if (runtime
->status
->state
!= SNDRV_PCM_STATE_RUNNING
)
986 } else if (runtime
->status
->state
!= SNDRV_PCM_STATE_PAUSED
)
988 runtime
->trigger_master
= substream
;
992 static int snd_pcm_do_pause(struct snd_pcm_substream
*substream
, int push
)
994 if (substream
->runtime
->trigger_master
!= substream
)
996 /* some drivers might use hw_ptr to recover from the pause -
997 update the hw_ptr now */
999 snd_pcm_update_hw_ptr(substream
);
1000 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1001 * a delta between the current jiffies, this gives a large enough
1002 * delta, effectively to skip the check once.
1004 substream
->runtime
->hw_ptr_jiffies
= jiffies
- HZ
* 1000;
1005 return substream
->ops
->trigger(substream
,
1006 push
? SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
1007 SNDRV_PCM_TRIGGER_PAUSE_RELEASE
);
1010 static void snd_pcm_undo_pause(struct snd_pcm_substream
*substream
, int push
)
1012 if (substream
->runtime
->trigger_master
== substream
)
1013 substream
->ops
->trigger(substream
,
1014 push
? SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1015 SNDRV_PCM_TRIGGER_PAUSE_PUSH
);
1018 static void snd_pcm_post_pause(struct snd_pcm_substream
*substream
, int push
)
1020 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1021 snd_pcm_trigger_tstamp(substream
);
1023 runtime
->status
->state
= SNDRV_PCM_STATE_PAUSED
;
1024 if (substream
->timer
)
1025 snd_timer_notify(substream
->timer
,
1026 SNDRV_TIMER_EVENT_MPAUSE
,
1027 &runtime
->trigger_tstamp
);
1028 wake_up(&runtime
->sleep
);
1029 wake_up(&runtime
->tsleep
);
1031 runtime
->status
->state
= SNDRV_PCM_STATE_RUNNING
;
1032 if (substream
->timer
)
1033 snd_timer_notify(substream
->timer
,
1034 SNDRV_TIMER_EVENT_MCONTINUE
,
1035 &runtime
->trigger_tstamp
);
1039 static struct action_ops snd_pcm_action_pause
= {
1040 .pre_action
= snd_pcm_pre_pause
,
1041 .do_action
= snd_pcm_do_pause
,
1042 .undo_action
= snd_pcm_undo_pause
,
1043 .post_action
= snd_pcm_post_pause
1047 * Push/release the pause for all linked streams.
1049 static int snd_pcm_pause(struct snd_pcm_substream
*substream
, int push
)
1051 return snd_pcm_action(&snd_pcm_action_pause
, substream
, push
);
1057 static int snd_pcm_pre_suspend(struct snd_pcm_substream
*substream
, int state
)
1059 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1060 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1062 runtime
->trigger_master
= substream
;
1066 static int snd_pcm_do_suspend(struct snd_pcm_substream
*substream
, int state
)
1068 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1069 if (runtime
->trigger_master
!= substream
)
1071 if (! snd_pcm_running(substream
))
1073 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1074 return 0; /* suspend unconditionally */
1077 static void snd_pcm_post_suspend(struct snd_pcm_substream
*substream
, int state
)
1079 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1080 snd_pcm_trigger_tstamp(substream
);
1081 if (substream
->timer
)
1082 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSUSPEND
,
1083 &runtime
->trigger_tstamp
);
1084 runtime
->status
->suspended_state
= runtime
->status
->state
;
1085 runtime
->status
->state
= SNDRV_PCM_STATE_SUSPENDED
;
1086 wake_up(&runtime
->sleep
);
1087 wake_up(&runtime
->tsleep
);
1090 static struct action_ops snd_pcm_action_suspend
= {
1091 .pre_action
= snd_pcm_pre_suspend
,
1092 .do_action
= snd_pcm_do_suspend
,
1093 .post_action
= snd_pcm_post_suspend
1097 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1098 * @substream: the PCM substream
1100 * After this call, all streams are changed to SUSPENDED state.
1102 int snd_pcm_suspend(struct snd_pcm_substream
*substream
)
1105 unsigned long flags
;
1110 snd_pcm_stream_lock_irqsave(substream
, flags
);
1111 err
= snd_pcm_action(&snd_pcm_action_suspend
, substream
, 0);
1112 snd_pcm_stream_unlock_irqrestore(substream
, flags
);
1116 EXPORT_SYMBOL(snd_pcm_suspend
);
1119 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1120 * @pcm: the PCM instance
1122 * After this call, all streams are changed to SUSPENDED state.
1124 int snd_pcm_suspend_all(struct snd_pcm
*pcm
)
1126 struct snd_pcm_substream
*substream
;
1127 int stream
, err
= 0;
1132 for (stream
= 0; stream
< 2; stream
++) {
1133 for (substream
= pcm
->streams
[stream
].substream
;
1134 substream
; substream
= substream
->next
) {
1135 /* FIXME: the open/close code should lock this as well */
1136 if (substream
->runtime
== NULL
)
1138 err
= snd_pcm_suspend(substream
);
1139 if (err
< 0 && err
!= -EBUSY
)
1146 EXPORT_SYMBOL(snd_pcm_suspend_all
);
1150 static int snd_pcm_pre_resume(struct snd_pcm_substream
*substream
, int state
)
1152 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1153 if (!(runtime
->info
& SNDRV_PCM_INFO_RESUME
))
1155 runtime
->trigger_master
= substream
;
1159 static int snd_pcm_do_resume(struct snd_pcm_substream
*substream
, int state
)
1161 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1162 if (runtime
->trigger_master
!= substream
)
1164 /* DMA not running previously? */
1165 if (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_RUNNING
&&
1166 (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_DRAINING
||
1167 substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
1169 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_RESUME
);
1172 static void snd_pcm_undo_resume(struct snd_pcm_substream
*substream
, int state
)
1174 if (substream
->runtime
->trigger_master
== substream
&&
1175 snd_pcm_running(substream
))
1176 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1179 static void snd_pcm_post_resume(struct snd_pcm_substream
*substream
, int state
)
1181 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1182 snd_pcm_trigger_tstamp(substream
);
1183 if (substream
->timer
)
1184 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MRESUME
,
1185 &runtime
->trigger_tstamp
);
1186 runtime
->status
->state
= runtime
->status
->suspended_state
;
1189 static struct action_ops snd_pcm_action_resume
= {
1190 .pre_action
= snd_pcm_pre_resume
,
1191 .do_action
= snd_pcm_do_resume
,
1192 .undo_action
= snd_pcm_undo_resume
,
1193 .post_action
= snd_pcm_post_resume
1196 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1198 struct snd_card
*card
= substream
->pcm
->card
;
1201 snd_power_lock(card
);
1202 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1203 res
= snd_pcm_action_lock_irq(&snd_pcm_action_resume
, substream
, 0);
1204 snd_power_unlock(card
);
1210 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1215 #endif /* CONFIG_PM */
1220 * Change the RUNNING stream(s) to XRUN state.
1222 static int snd_pcm_xrun(struct snd_pcm_substream
*substream
)
1224 struct snd_card
*card
= substream
->pcm
->card
;
1225 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1228 snd_power_lock(card
);
1229 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1230 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1235 snd_pcm_stream_lock_irq(substream
);
1236 switch (runtime
->status
->state
) {
1237 case SNDRV_PCM_STATE_XRUN
:
1238 result
= 0; /* already there */
1240 case SNDRV_PCM_STATE_RUNNING
:
1241 result
= snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
1246 snd_pcm_stream_unlock_irq(substream
);
1248 snd_power_unlock(card
);
1255 static int snd_pcm_pre_reset(struct snd_pcm_substream
*substream
, int state
)
1257 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1258 switch (runtime
->status
->state
) {
1259 case SNDRV_PCM_STATE_RUNNING
:
1260 case SNDRV_PCM_STATE_PREPARED
:
1261 case SNDRV_PCM_STATE_PAUSED
:
1262 case SNDRV_PCM_STATE_SUSPENDED
:
1269 static int snd_pcm_do_reset(struct snd_pcm_substream
*substream
, int state
)
1271 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1272 int err
= substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_RESET
, NULL
);
1275 runtime
->hw_ptr_base
= 0;
1276 runtime
->hw_ptr_interrupt
= runtime
->status
->hw_ptr
-
1277 runtime
->status
->hw_ptr
% runtime
->period_size
;
1278 runtime
->silence_start
= runtime
->status
->hw_ptr
;
1279 runtime
->silence_filled
= 0;
1283 static void snd_pcm_post_reset(struct snd_pcm_substream
*substream
, int state
)
1285 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1286 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1287 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
1288 runtime
->silence_size
> 0)
1289 snd_pcm_playback_silence(substream
, ULONG_MAX
);
1292 static struct action_ops snd_pcm_action_reset
= {
1293 .pre_action
= snd_pcm_pre_reset
,
1294 .do_action
= snd_pcm_do_reset
,
1295 .post_action
= snd_pcm_post_reset
1298 static int snd_pcm_reset(struct snd_pcm_substream
*substream
)
1300 return snd_pcm_action_nonatomic(&snd_pcm_action_reset
, substream
, 0);
1306 /* we use the second argument for updating f_flags */
1307 static int snd_pcm_pre_prepare(struct snd_pcm_substream
*substream
,
1310 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1311 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1312 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
)
1314 if (snd_pcm_running(substream
))
1316 substream
->f_flags
= f_flags
;
1320 static int snd_pcm_do_prepare(struct snd_pcm_substream
*substream
, int state
)
1323 err
= substream
->ops
->prepare(substream
);
1326 return snd_pcm_do_reset(substream
, 0);
1329 static void snd_pcm_post_prepare(struct snd_pcm_substream
*substream
, int state
)
1331 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1332 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1333 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_PREPARED
);
1336 static struct action_ops snd_pcm_action_prepare
= {
1337 .pre_action
= snd_pcm_pre_prepare
,
1338 .do_action
= snd_pcm_do_prepare
,
1339 .post_action
= snd_pcm_post_prepare
1343 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1344 * @substream: the PCM substream instance
1345 * @file: file to refer f_flags
1347 static int snd_pcm_prepare(struct snd_pcm_substream
*substream
,
1351 struct snd_card
*card
= substream
->pcm
->card
;
1355 f_flags
= file
->f_flags
;
1357 f_flags
= substream
->f_flags
;
1359 snd_power_lock(card
);
1360 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1361 res
= snd_pcm_action_nonatomic(&snd_pcm_action_prepare
,
1362 substream
, f_flags
);
1363 snd_power_unlock(card
);
1371 static int snd_pcm_pre_drain_init(struct snd_pcm_substream
*substream
, int state
)
1373 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1374 switch (runtime
->status
->state
) {
1375 case SNDRV_PCM_STATE_OPEN
:
1376 case SNDRV_PCM_STATE_DISCONNECTED
:
1377 case SNDRV_PCM_STATE_SUSPENDED
:
1380 runtime
->trigger_master
= substream
;
1384 static int snd_pcm_do_drain_init(struct snd_pcm_substream
*substream
, int state
)
1386 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1387 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
1388 switch (runtime
->status
->state
) {
1389 case SNDRV_PCM_STATE_PREPARED
:
1390 /* start playback stream if possible */
1391 if (! snd_pcm_playback_empty(substream
)) {
1392 snd_pcm_do_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1393 snd_pcm_post_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1396 case SNDRV_PCM_STATE_RUNNING
:
1397 runtime
->status
->state
= SNDRV_PCM_STATE_DRAINING
;
1399 case SNDRV_PCM_STATE_XRUN
:
1400 runtime
->status
->state
= SNDRV_PCM_STATE_SETUP
;
1406 /* stop running stream */
1407 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
) {
1408 int new_state
= snd_pcm_capture_avail(runtime
) > 0 ?
1409 SNDRV_PCM_STATE_DRAINING
: SNDRV_PCM_STATE_SETUP
;
1410 snd_pcm_do_stop(substream
, new_state
);
1411 snd_pcm_post_stop(substream
, new_state
);
1417 static void snd_pcm_post_drain_init(struct snd_pcm_substream
*substream
, int state
)
1421 static struct action_ops snd_pcm_action_drain_init
= {
1422 .pre_action
= snd_pcm_pre_drain_init
,
1423 .do_action
= snd_pcm_do_drain_init
,
1424 .post_action
= snd_pcm_post_drain_init
1427 static int snd_pcm_drop(struct snd_pcm_substream
*substream
);
1430 * Drain the stream(s).
1431 * When the substream is linked, sync until the draining of all playback streams
1433 * After this call, all streams are supposed to be either SETUP or DRAINING
1434 * (capture only) state.
1436 static int snd_pcm_drain(struct snd_pcm_substream
*substream
,
1439 struct snd_card
*card
;
1440 struct snd_pcm_runtime
*runtime
;
1441 struct snd_pcm_substream
*s
;
1446 card
= substream
->pcm
->card
;
1447 runtime
= substream
->runtime
;
1449 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1452 snd_power_lock(card
);
1453 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1454 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1456 snd_power_unlock(card
);
1462 if (file
->f_flags
& O_NONBLOCK
)
1464 } else if (substream
->f_flags
& O_NONBLOCK
)
1467 down_read(&snd_pcm_link_rwsem
);
1468 snd_pcm_stream_lock_irq(substream
);
1470 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1471 snd_pcm_pause(substream
, 0);
1473 /* pre-start/stop - all running streams are changed to DRAINING state */
1474 result
= snd_pcm_action(&snd_pcm_action_drain_init
, substream
, 0);
1477 /* in non-blocking, we don't wait in ioctl but let caller poll */
1485 struct snd_pcm_runtime
*to_check
;
1486 if (signal_pending(current
)) {
1487 result
= -ERESTARTSYS
;
1490 /* find a substream to drain */
1492 snd_pcm_group_for_each_entry(s
, substream
) {
1493 if (s
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
)
1495 runtime
= s
->runtime
;
1496 if (runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
1502 break; /* all drained */
1503 init_waitqueue_entry(&wait
, current
);
1504 add_wait_queue(&to_check
->sleep
, &wait
);
1505 snd_pcm_stream_unlock_irq(substream
);
1506 up_read(&snd_pcm_link_rwsem
);
1507 snd_power_unlock(card
);
1508 if (runtime
->no_period_wakeup
)
1509 tout
= MAX_SCHEDULE_TIMEOUT
;
1512 if (runtime
->rate
) {
1513 long t
= runtime
->period_size
* 2 / runtime
->rate
;
1514 tout
= max(t
, tout
);
1516 tout
= msecs_to_jiffies(tout
* 1000);
1518 tout
= schedule_timeout_interruptible(tout
);
1519 snd_power_lock(card
);
1520 down_read(&snd_pcm_link_rwsem
);
1521 snd_pcm_stream_lock_irq(substream
);
1522 remove_wait_queue(&to_check
->sleep
, &wait
);
1523 if (card
->shutdown
) {
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
);
1540 snd_pcm_stream_unlock_irq(substream
);
1541 up_read(&snd_pcm_link_rwsem
);
1542 snd_power_unlock(card
);
1550 * Immediately put all linked substreams into SETUP state.
1552 static int snd_pcm_drop(struct snd_pcm_substream
*substream
)
1554 struct snd_pcm_runtime
*runtime
;
1557 if (PCM_RUNTIME_CHECK(substream
))
1559 runtime
= substream
->runtime
;
1561 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1562 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
||
1563 runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1566 snd_pcm_stream_lock_irq(substream
);
1568 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1569 snd_pcm_pause(substream
, 0);
1571 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1572 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1573 snd_pcm_stream_unlock_irq(substream
);
1579 /* WARNING: Don't forget to fput back the file */
1580 static struct file
*snd_pcm_file_fd(int fd
, int *fput_needed
)
1583 struct inode
*inode
;
1586 file
= fget_light(fd
, fput_needed
);
1589 inode
= file
->f_path
.dentry
->d_inode
;
1590 if (!S_ISCHR(inode
->i_mode
) ||
1591 imajor(inode
) != snd_major
) {
1592 fput_light(file
, *fput_needed
);
1595 minor
= iminor(inode
);
1596 if (!snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_PLAYBACK
) &&
1597 !snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_CAPTURE
)) {
1598 fput_light(file
, *fput_needed
);
1607 static int snd_pcm_link(struct snd_pcm_substream
*substream
, int fd
)
1611 struct snd_pcm_file
*pcm_file
;
1612 struct snd_pcm_substream
*substream1
;
1613 struct snd_pcm_group
*group
;
1616 file
= snd_pcm_file_fd(fd
, &fput_needed
);
1619 pcm_file
= file
->private_data
;
1620 substream1
= pcm_file
->substream
;
1621 group
= kmalloc(sizeof(*group
), GFP_KERNEL
);
1626 down_write(&snd_pcm_link_rwsem
);
1627 write_lock_irq(&snd_pcm_link_rwlock
);
1628 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1629 substream
->runtime
->status
->state
!= substream1
->runtime
->status
->state
) {
1633 if (snd_pcm_stream_linked(substream1
)) {
1637 if (!snd_pcm_stream_linked(substream
)) {
1638 substream
->group
= group
;
1639 spin_lock_init(&substream
->group
->lock
);
1640 INIT_LIST_HEAD(&substream
->group
->substreams
);
1641 list_add_tail(&substream
->link_list
, &substream
->group
->substreams
);
1642 substream
->group
->count
= 1;
1644 list_add_tail(&substream1
->link_list
, &substream
->group
->substreams
);
1645 substream
->group
->count
++;
1646 substream1
->group
= substream
->group
;
1648 write_unlock_irq(&snd_pcm_link_rwlock
);
1649 up_write(&snd_pcm_link_rwsem
);
1651 snd_card_unref(substream1
->pcm
->card
);
1652 fput_light(file
, fput_needed
);
1658 static void relink_to_local(struct snd_pcm_substream
*substream
)
1660 substream
->group
= &substream
->self_group
;
1661 INIT_LIST_HEAD(&substream
->self_group
.substreams
);
1662 list_add_tail(&substream
->link_list
, &substream
->self_group
.substreams
);
1665 static int snd_pcm_unlink(struct snd_pcm_substream
*substream
)
1667 struct snd_pcm_substream
*s
;
1670 down_write(&snd_pcm_link_rwsem
);
1671 write_lock_irq(&snd_pcm_link_rwlock
);
1672 if (!snd_pcm_stream_linked(substream
)) {
1676 list_del(&substream
->link_list
);
1677 substream
->group
->count
--;
1678 if (substream
->group
->count
== 1) { /* detach the last stream, too */
1679 snd_pcm_group_for_each_entry(s
, substream
) {
1683 kfree(substream
->group
);
1685 relink_to_local(substream
);
1687 write_unlock_irq(&snd_pcm_link_rwlock
);
1688 up_write(&snd_pcm_link_rwsem
);
1695 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params
*params
,
1696 struct snd_pcm_hw_rule
*rule
)
1698 struct snd_interval t
;
1699 snd_interval_mul(hw_param_interval_c(params
, rule
->deps
[0]),
1700 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1701 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1704 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params
*params
,
1705 struct snd_pcm_hw_rule
*rule
)
1707 struct snd_interval t
;
1708 snd_interval_div(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_muldivk(struct snd_pcm_hw_params
*params
,
1714 struct snd_pcm_hw_rule
*rule
)
1716 struct snd_interval t
;
1717 snd_interval_muldivk(hw_param_interval_c(params
, rule
->deps
[0]),
1718 hw_param_interval_c(params
, rule
->deps
[1]),
1719 (unsigned long) rule
->private, &t
);
1720 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1723 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params
*params
,
1724 struct snd_pcm_hw_rule
*rule
)
1726 struct snd_interval t
;
1727 snd_interval_mulkdiv(hw_param_interval_c(params
, rule
->deps
[0]),
1728 (unsigned long) rule
->private,
1729 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1730 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1733 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params
*params
,
1734 struct snd_pcm_hw_rule
*rule
)
1737 struct snd_interval
*i
= hw_param_interval(params
, rule
->deps
[0]);
1739 struct snd_mask
*mask
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1741 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1743 if (! snd_mask_test(mask
, k
))
1745 bits
= snd_pcm_format_physical_width(k
);
1747 continue; /* ignore invalid formats */
1748 if ((unsigned)bits
< i
->min
|| (unsigned)bits
> i
->max
)
1749 snd_mask_reset(&m
, k
);
1751 return snd_mask_refine(mask
, &m
);
1754 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params
*params
,
1755 struct snd_pcm_hw_rule
*rule
)
1757 struct snd_interval t
;
1763 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1765 if (! snd_mask_test(hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
), k
))
1767 bits
= snd_pcm_format_physical_width(k
);
1769 continue; /* ignore invalid formats */
1770 if (t
.min
> (unsigned)bits
)
1772 if (t
.max
< (unsigned)bits
)
1776 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1779 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1780 #error "Change this table"
1783 static unsigned int rates
[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1784 48000, 64000, 88200, 96000, 176400, 192000 };
1786 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates
= {
1787 .count
= ARRAY_SIZE(rates
),
1791 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params
*params
,
1792 struct snd_pcm_hw_rule
*rule
)
1794 struct snd_pcm_hardware
*hw
= rule
->private;
1795 return snd_interval_list(hw_param_interval(params
, rule
->var
),
1796 snd_pcm_known_rates
.count
,
1797 snd_pcm_known_rates
.list
, hw
->rates
);
1800 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params
*params
,
1801 struct snd_pcm_hw_rule
*rule
)
1803 struct snd_interval t
;
1804 struct snd_pcm_substream
*substream
= rule
->private;
1806 t
.max
= substream
->buffer_bytes_max
;
1810 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1813 int snd_pcm_hw_constraints_init(struct snd_pcm_substream
*substream
)
1815 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1816 struct snd_pcm_hw_constraints
*constrs
= &runtime
->hw_constraints
;
1819 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
1820 snd_mask_any(constrs_mask(constrs
, k
));
1823 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
1824 snd_interval_any(constrs_interval(constrs
, k
));
1827 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_CHANNELS
));
1828 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
));
1829 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
));
1830 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
));
1831 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_FRAME_BITS
));
1833 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1834 snd_pcm_hw_rule_format
, NULL
,
1835 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1838 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1839 snd_pcm_hw_rule_sample_bits
, NULL
,
1840 SNDRV_PCM_HW_PARAM_FORMAT
,
1841 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1844 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1845 snd_pcm_hw_rule_div
, NULL
,
1846 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1849 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1850 snd_pcm_hw_rule_mul
, NULL
,
1851 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1854 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1855 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1856 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1859 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1860 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1861 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, -1);
1864 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
1865 snd_pcm_hw_rule_div
, NULL
,
1866 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1869 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1870 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1871 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
, -1);
1874 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1875 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1876 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_BUFFER_TIME
, -1);
1879 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIODS
,
1880 snd_pcm_hw_rule_div
, NULL
,
1881 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1884 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1885 snd_pcm_hw_rule_div
, NULL
,
1886 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1889 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1890 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1891 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1894 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1895 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1896 SNDRV_PCM_HW_PARAM_PERIOD_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1899 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1900 snd_pcm_hw_rule_mul
, NULL
,
1901 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1904 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1905 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1906 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1909 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1910 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1911 SNDRV_PCM_HW_PARAM_BUFFER_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1914 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1915 snd_pcm_hw_rule_muldivk
, (void*) 8,
1916 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1919 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1920 snd_pcm_hw_rule_muldivk
, (void*) 8,
1921 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1924 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
1925 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1926 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1929 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME
,
1930 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1931 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1937 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream
*substream
)
1939 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1940 struct snd_pcm_hardware
*hw
= &runtime
->hw
;
1942 unsigned int mask
= 0;
1944 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1945 mask
|= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED
;
1946 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1947 mask
|= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
;
1948 if (hw
->info
& SNDRV_PCM_INFO_MMAP
) {
1949 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1950 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED
;
1951 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1952 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED
;
1953 if (hw
->info
& SNDRV_PCM_INFO_COMPLEX
)
1954 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX
;
1956 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_ACCESS
, mask
);
1960 err
= snd_pcm_hw_constraint_mask64(runtime
, SNDRV_PCM_HW_PARAM_FORMAT
, hw
->formats
);
1964 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_SUBFORMAT
, 1 << SNDRV_PCM_SUBFORMAT_STD
);
1968 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_CHANNELS
,
1969 hw
->channels_min
, hw
->channels_max
);
1973 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_RATE
,
1974 hw
->rate_min
, hw
->rate_max
);
1978 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1979 hw
->period_bytes_min
, hw
->period_bytes_max
);
1983 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIODS
,
1984 hw
->periods_min
, hw
->periods_max
);
1988 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1989 hw
->period_bytes_min
, hw
->buffer_bytes_max
);
1993 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1994 snd_pcm_hw_rule_buffer_bytes_max
, substream
,
1995 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, -1);
2000 if (runtime
->dma_bytes
) {
2001 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, 0, runtime
->dma_bytes
);
2006 if (!(hw
->rates
& (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))) {
2007 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
2008 snd_pcm_hw_rule_rate
, hw
,
2009 SNDRV_PCM_HW_PARAM_RATE
, -1);
2014 /* FIXME: this belong to lowlevel */
2015 snd_pcm_hw_constraint_integer(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
);
2020 static void pcm_release_private(struct snd_pcm_substream
*substream
)
2022 snd_pcm_unlink(substream
);
2025 void snd_pcm_release_substream(struct snd_pcm_substream
*substream
)
2027 substream
->ref_count
--;
2028 if (substream
->ref_count
> 0)
2031 snd_pcm_drop(substream
);
2032 if (substream
->hw_opened
) {
2033 if (substream
->ops
->hw_free
!= NULL
)
2034 substream
->ops
->hw_free(substream
);
2035 substream
->ops
->close(substream
);
2036 substream
->hw_opened
= 0;
2038 if (pm_qos_request_active(&substream
->latency_pm_qos_req
))
2039 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
2040 if (substream
->pcm_release
) {
2041 substream
->pcm_release(substream
);
2042 substream
->pcm_release
= NULL
;
2044 snd_pcm_detach_substream(substream
);
2047 EXPORT_SYMBOL(snd_pcm_release_substream
);
2049 int snd_pcm_open_substream(struct snd_pcm
*pcm
, int stream
,
2051 struct snd_pcm_substream
**rsubstream
)
2053 struct snd_pcm_substream
*substream
;
2056 err
= snd_pcm_attach_substream(pcm
, stream
, file
, &substream
);
2059 if (substream
->ref_count
> 1) {
2060 *rsubstream
= substream
;
2064 err
= snd_pcm_hw_constraints_init(substream
);
2066 snd_printd("snd_pcm_hw_constraints_init failed\n");
2070 if ((err
= substream
->ops
->open(substream
)) < 0)
2073 substream
->hw_opened
= 1;
2075 err
= snd_pcm_hw_constraints_complete(substream
);
2077 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2081 *rsubstream
= substream
;
2085 snd_pcm_release_substream(substream
);
2089 EXPORT_SYMBOL(snd_pcm_open_substream
);
2091 static int snd_pcm_open_file(struct file
*file
,
2092 struct snd_pcm
*pcm
,
2095 struct snd_pcm_file
*pcm_file
;
2096 struct snd_pcm_substream
*substream
;
2099 err
= snd_pcm_open_substream(pcm
, stream
, file
, &substream
);
2103 pcm_file
= kzalloc(sizeof(*pcm_file
), GFP_KERNEL
);
2104 if (pcm_file
== NULL
) {
2105 snd_pcm_release_substream(substream
);
2108 pcm_file
->substream
= substream
;
2109 if (substream
->ref_count
== 1) {
2110 substream
->file
= pcm_file
;
2111 substream
->pcm_release
= pcm_release_private
;
2113 file
->private_data
= pcm_file
;
2118 static int snd_pcm_playback_open(struct inode
*inode
, struct file
*file
)
2120 struct snd_pcm
*pcm
;
2121 int err
= nonseekable_open(inode
, file
);
2124 pcm
= snd_lookup_minor_data(iminor(inode
),
2125 SNDRV_DEVICE_TYPE_PCM_PLAYBACK
);
2126 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_PLAYBACK
);
2128 snd_card_unref(pcm
->card
);
2132 static int snd_pcm_capture_open(struct inode
*inode
, struct file
*file
)
2134 struct snd_pcm
*pcm
;
2135 int err
= nonseekable_open(inode
, file
);
2138 pcm
= snd_lookup_minor_data(iminor(inode
),
2139 SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
2140 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_CAPTURE
);
2142 snd_card_unref(pcm
->card
);
2146 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
)
2155 err
= snd_card_file_add(pcm
->card
, file
);
2158 if (!try_module_get(pcm
->card
->module
)) {
2162 init_waitqueue_entry(&wait
, current
);
2163 add_wait_queue(&pcm
->open_wait
, &wait
);
2164 mutex_lock(&pcm
->open_mutex
);
2166 err
= snd_pcm_open_file(file
, pcm
, stream
);
2169 if (err
== -EAGAIN
) {
2170 if (file
->f_flags
& O_NONBLOCK
) {
2176 set_current_state(TASK_INTERRUPTIBLE
);
2177 mutex_unlock(&pcm
->open_mutex
);
2179 mutex_lock(&pcm
->open_mutex
);
2180 if (pcm
->card
->shutdown
) {
2184 if (signal_pending(current
)) {
2189 remove_wait_queue(&pcm
->open_wait
, &wait
);
2190 mutex_unlock(&pcm
->open_mutex
);
2196 module_put(pcm
->card
->module
);
2198 snd_card_file_remove(pcm
->card
, file
);
2203 static int snd_pcm_release(struct inode
*inode
, struct file
*file
)
2205 struct snd_pcm
*pcm
;
2206 struct snd_pcm_substream
*substream
;
2207 struct snd_pcm_file
*pcm_file
;
2209 pcm_file
= file
->private_data
;
2210 substream
= pcm_file
->substream
;
2211 if (snd_BUG_ON(!substream
))
2213 pcm
= substream
->pcm
;
2214 mutex_lock(&pcm
->open_mutex
);
2215 snd_pcm_release_substream(substream
);
2217 mutex_unlock(&pcm
->open_mutex
);
2218 wake_up(&pcm
->open_wait
);
2219 module_put(pcm
->card
->module
);
2220 snd_card_file_remove(pcm
->card
, file
);
2224 static snd_pcm_sframes_t
snd_pcm_playback_rewind(struct snd_pcm_substream
*substream
,
2225 snd_pcm_uframes_t frames
)
2227 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2228 snd_pcm_sframes_t appl_ptr
;
2229 snd_pcm_sframes_t ret
;
2230 snd_pcm_sframes_t hw_avail
;
2235 snd_pcm_stream_lock_irq(substream
);
2236 switch (runtime
->status
->state
) {
2237 case SNDRV_PCM_STATE_PREPARED
:
2239 case SNDRV_PCM_STATE_DRAINING
:
2240 case SNDRV_PCM_STATE_RUNNING
:
2241 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2244 case SNDRV_PCM_STATE_XRUN
:
2247 case SNDRV_PCM_STATE_SUSPENDED
:
2255 hw_avail
= snd_pcm_playback_hw_avail(runtime
);
2256 if (hw_avail
<= 0) {
2260 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2262 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2264 appl_ptr
+= runtime
->boundary
;
2265 runtime
->control
->appl_ptr
= appl_ptr
;
2268 snd_pcm_stream_unlock_irq(substream
);
2272 static snd_pcm_sframes_t
snd_pcm_capture_rewind(struct snd_pcm_substream
*substream
,
2273 snd_pcm_uframes_t frames
)
2275 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2276 snd_pcm_sframes_t appl_ptr
;
2277 snd_pcm_sframes_t ret
;
2278 snd_pcm_sframes_t hw_avail
;
2283 snd_pcm_stream_lock_irq(substream
);
2284 switch (runtime
->status
->state
) {
2285 case SNDRV_PCM_STATE_PREPARED
:
2286 case SNDRV_PCM_STATE_DRAINING
:
2288 case SNDRV_PCM_STATE_RUNNING
:
2289 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2292 case SNDRV_PCM_STATE_XRUN
:
2295 case SNDRV_PCM_STATE_SUSPENDED
:
2303 hw_avail
= snd_pcm_capture_hw_avail(runtime
);
2304 if (hw_avail
<= 0) {
2308 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2310 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2312 appl_ptr
+= runtime
->boundary
;
2313 runtime
->control
->appl_ptr
= appl_ptr
;
2316 snd_pcm_stream_unlock_irq(substream
);
2320 static snd_pcm_sframes_t
snd_pcm_playback_forward(struct snd_pcm_substream
*substream
,
2321 snd_pcm_uframes_t frames
)
2323 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2324 snd_pcm_sframes_t appl_ptr
;
2325 snd_pcm_sframes_t ret
;
2326 snd_pcm_sframes_t avail
;
2331 snd_pcm_stream_lock_irq(substream
);
2332 switch (runtime
->status
->state
) {
2333 case SNDRV_PCM_STATE_PREPARED
:
2334 case SNDRV_PCM_STATE_PAUSED
:
2336 case SNDRV_PCM_STATE_DRAINING
:
2337 case SNDRV_PCM_STATE_RUNNING
:
2338 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2341 case SNDRV_PCM_STATE_XRUN
:
2344 case SNDRV_PCM_STATE_SUSPENDED
:
2352 avail
= snd_pcm_playback_avail(runtime
);
2357 if (frames
> (snd_pcm_uframes_t
)avail
)
2359 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2360 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2361 appl_ptr
-= runtime
->boundary
;
2362 runtime
->control
->appl_ptr
= appl_ptr
;
2365 snd_pcm_stream_unlock_irq(substream
);
2369 static snd_pcm_sframes_t
snd_pcm_capture_forward(struct snd_pcm_substream
*substream
,
2370 snd_pcm_uframes_t frames
)
2372 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2373 snd_pcm_sframes_t appl_ptr
;
2374 snd_pcm_sframes_t ret
;
2375 snd_pcm_sframes_t avail
;
2380 snd_pcm_stream_lock_irq(substream
);
2381 switch (runtime
->status
->state
) {
2382 case SNDRV_PCM_STATE_PREPARED
:
2383 case SNDRV_PCM_STATE_DRAINING
:
2384 case SNDRV_PCM_STATE_PAUSED
:
2386 case SNDRV_PCM_STATE_RUNNING
:
2387 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2390 case SNDRV_PCM_STATE_XRUN
:
2393 case SNDRV_PCM_STATE_SUSPENDED
:
2401 avail
= snd_pcm_capture_avail(runtime
);
2406 if (frames
> (snd_pcm_uframes_t
)avail
)
2408 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2409 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2410 appl_ptr
-= runtime
->boundary
;
2411 runtime
->control
->appl_ptr
= appl_ptr
;
2414 snd_pcm_stream_unlock_irq(substream
);
2418 static int snd_pcm_hwsync(struct snd_pcm_substream
*substream
)
2420 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2423 snd_pcm_stream_lock_irq(substream
);
2424 switch (runtime
->status
->state
) {
2425 case SNDRV_PCM_STATE_DRAINING
:
2426 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2428 case SNDRV_PCM_STATE_RUNNING
:
2429 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2432 case SNDRV_PCM_STATE_PREPARED
:
2433 case SNDRV_PCM_STATE_SUSPENDED
:
2436 case SNDRV_PCM_STATE_XRUN
:
2444 snd_pcm_stream_unlock_irq(substream
);
2448 static int snd_pcm_delay(struct snd_pcm_substream
*substream
,
2449 snd_pcm_sframes_t __user
*res
)
2451 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2453 snd_pcm_sframes_t n
= 0;
2455 snd_pcm_stream_lock_irq(substream
);
2456 switch (runtime
->status
->state
) {
2457 case SNDRV_PCM_STATE_DRAINING
:
2458 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2460 case SNDRV_PCM_STATE_RUNNING
:
2461 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2464 case SNDRV_PCM_STATE_PREPARED
:
2465 case SNDRV_PCM_STATE_SUSPENDED
:
2467 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2468 n
= snd_pcm_playback_hw_avail(runtime
);
2470 n
= snd_pcm_capture_avail(runtime
);
2471 n
+= runtime
->delay
;
2473 case SNDRV_PCM_STATE_XRUN
:
2481 snd_pcm_stream_unlock_irq(substream
);
2483 if (put_user(n
, res
))
2488 static int snd_pcm_sync_ptr(struct snd_pcm_substream
*substream
,
2489 struct snd_pcm_sync_ptr __user
*_sync_ptr
)
2491 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2492 struct snd_pcm_sync_ptr sync_ptr
;
2493 volatile struct snd_pcm_mmap_status
*status
;
2494 volatile struct snd_pcm_mmap_control
*control
;
2497 memset(&sync_ptr
, 0, sizeof(sync_ptr
));
2498 if (get_user(sync_ptr
.flags
, (unsigned __user
*)&(_sync_ptr
->flags
)))
2500 if (copy_from_user(&sync_ptr
.c
.control
, &(_sync_ptr
->c
.control
), sizeof(struct snd_pcm_mmap_control
)))
2502 status
= runtime
->status
;
2503 control
= runtime
->control
;
2504 if (sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_HWSYNC
) {
2505 err
= snd_pcm_hwsync(substream
);
2509 snd_pcm_stream_lock_irq(substream
);
2510 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_APPL
))
2511 control
->appl_ptr
= sync_ptr
.c
.control
.appl_ptr
;
2513 sync_ptr
.c
.control
.appl_ptr
= control
->appl_ptr
;
2514 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_AVAIL_MIN
))
2515 control
->avail_min
= sync_ptr
.c
.control
.avail_min
;
2517 sync_ptr
.c
.control
.avail_min
= control
->avail_min
;
2518 sync_ptr
.s
.status
.state
= status
->state
;
2519 sync_ptr
.s
.status
.hw_ptr
= status
->hw_ptr
;
2520 sync_ptr
.s
.status
.tstamp
= status
->tstamp
;
2521 sync_ptr
.s
.status
.suspended_state
= status
->suspended_state
;
2522 snd_pcm_stream_unlock_irq(substream
);
2523 if (copy_to_user(_sync_ptr
, &sync_ptr
, sizeof(sync_ptr
)))
2528 static int snd_pcm_tstamp(struct snd_pcm_substream
*substream
, int __user
*_arg
)
2530 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2533 if (get_user(arg
, _arg
))
2535 if (arg
< 0 || arg
> SNDRV_PCM_TSTAMP_TYPE_LAST
)
2537 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY
;
2538 if (arg
== SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
)
2539 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
;
2543 static int snd_pcm_common_ioctl1(struct file
*file
,
2544 struct snd_pcm_substream
*substream
,
2545 unsigned int cmd
, void __user
*arg
)
2548 case SNDRV_PCM_IOCTL_PVERSION
:
2549 return put_user(SNDRV_PCM_VERSION
, (int __user
*)arg
) ? -EFAULT
: 0;
2550 case SNDRV_PCM_IOCTL_INFO
:
2551 return snd_pcm_info_user(substream
, arg
);
2552 case SNDRV_PCM_IOCTL_TSTAMP
: /* just for compatibility */
2554 case SNDRV_PCM_IOCTL_TTSTAMP
:
2555 return snd_pcm_tstamp(substream
, arg
);
2556 case SNDRV_PCM_IOCTL_HW_REFINE
:
2557 return snd_pcm_hw_refine_user(substream
, arg
);
2558 case SNDRV_PCM_IOCTL_HW_PARAMS
:
2559 return snd_pcm_hw_params_user(substream
, arg
);
2560 case SNDRV_PCM_IOCTL_HW_FREE
:
2561 return snd_pcm_hw_free(substream
);
2562 case SNDRV_PCM_IOCTL_SW_PARAMS
:
2563 return snd_pcm_sw_params_user(substream
, arg
);
2564 case SNDRV_PCM_IOCTL_STATUS
:
2565 return snd_pcm_status_user(substream
, arg
);
2566 case SNDRV_PCM_IOCTL_CHANNEL_INFO
:
2567 return snd_pcm_channel_info_user(substream
, arg
);
2568 case SNDRV_PCM_IOCTL_PREPARE
:
2569 return snd_pcm_prepare(substream
, file
);
2570 case SNDRV_PCM_IOCTL_RESET
:
2571 return snd_pcm_reset(substream
);
2572 case SNDRV_PCM_IOCTL_START
:
2573 return snd_pcm_action_lock_irq(&snd_pcm_action_start
, substream
, SNDRV_PCM_STATE_RUNNING
);
2574 case SNDRV_PCM_IOCTL_LINK
:
2575 return snd_pcm_link(substream
, (int)(unsigned long) arg
);
2576 case SNDRV_PCM_IOCTL_UNLINK
:
2577 return snd_pcm_unlink(substream
);
2578 case SNDRV_PCM_IOCTL_RESUME
:
2579 return snd_pcm_resume(substream
);
2580 case SNDRV_PCM_IOCTL_XRUN
:
2581 return snd_pcm_xrun(substream
);
2582 case SNDRV_PCM_IOCTL_HWSYNC
:
2583 return snd_pcm_hwsync(substream
);
2584 case SNDRV_PCM_IOCTL_DELAY
:
2585 return snd_pcm_delay(substream
, arg
);
2586 case SNDRV_PCM_IOCTL_SYNC_PTR
:
2587 return snd_pcm_sync_ptr(substream
, arg
);
2588 #ifdef CONFIG_SND_SUPPORT_OLD_API
2589 case SNDRV_PCM_IOCTL_HW_REFINE_OLD
:
2590 return snd_pcm_hw_refine_old_user(substream
, arg
);
2591 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD
:
2592 return snd_pcm_hw_params_old_user(substream
, arg
);
2594 case SNDRV_PCM_IOCTL_DRAIN
:
2595 return snd_pcm_drain(substream
, file
);
2596 case SNDRV_PCM_IOCTL_DROP
:
2597 return snd_pcm_drop(substream
);
2598 case SNDRV_PCM_IOCTL_PAUSE
:
2601 snd_pcm_stream_lock_irq(substream
);
2602 res
= snd_pcm_pause(substream
, (int)(unsigned long)arg
);
2603 snd_pcm_stream_unlock_irq(substream
);
2607 snd_printd("unknown ioctl = 0x%x\n", cmd
);
2611 static int snd_pcm_playback_ioctl1(struct file
*file
,
2612 struct snd_pcm_substream
*substream
,
2613 unsigned int cmd
, void __user
*arg
)
2615 if (snd_BUG_ON(!substream
))
2617 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
2620 case SNDRV_PCM_IOCTL_WRITEI_FRAMES
:
2622 struct snd_xferi xferi
;
2623 struct snd_xferi __user
*_xferi
= arg
;
2624 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2625 snd_pcm_sframes_t result
;
2626 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2628 if (put_user(0, &_xferi
->result
))
2630 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2632 result
= snd_pcm_lib_write(substream
, xferi
.buf
, xferi
.frames
);
2633 __put_user(result
, &_xferi
->result
);
2634 return result
< 0 ? result
: 0;
2636 case SNDRV_PCM_IOCTL_WRITEN_FRAMES
:
2638 struct snd_xfern xfern
;
2639 struct snd_xfern __user
*_xfern
= arg
;
2640 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2642 snd_pcm_sframes_t result
;
2643 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2645 if (runtime
->channels
> 128)
2647 if (put_user(0, &_xfern
->result
))
2649 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2652 bufs
= memdup_user(xfern
.bufs
,
2653 sizeof(void *) * runtime
->channels
);
2655 return PTR_ERR(bufs
);
2656 result
= snd_pcm_lib_writev(substream
, bufs
, xfern
.frames
);
2658 __put_user(result
, &_xfern
->result
);
2659 return result
< 0 ? result
: 0;
2661 case SNDRV_PCM_IOCTL_REWIND
:
2663 snd_pcm_uframes_t frames
;
2664 snd_pcm_uframes_t __user
*_frames
= arg
;
2665 snd_pcm_sframes_t result
;
2666 if (get_user(frames
, _frames
))
2668 if (put_user(0, _frames
))
2670 result
= snd_pcm_playback_rewind(substream
, frames
);
2671 __put_user(result
, _frames
);
2672 return result
< 0 ? result
: 0;
2674 case SNDRV_PCM_IOCTL_FORWARD
:
2676 snd_pcm_uframes_t frames
;
2677 snd_pcm_uframes_t __user
*_frames
= arg
;
2678 snd_pcm_sframes_t result
;
2679 if (get_user(frames
, _frames
))
2681 if (put_user(0, _frames
))
2683 result
= snd_pcm_playback_forward(substream
, frames
);
2684 __put_user(result
, _frames
);
2685 return result
< 0 ? result
: 0;
2688 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2691 static int snd_pcm_capture_ioctl1(struct file
*file
,
2692 struct snd_pcm_substream
*substream
,
2693 unsigned int cmd
, void __user
*arg
)
2695 if (snd_BUG_ON(!substream
))
2697 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_CAPTURE
))
2700 case SNDRV_PCM_IOCTL_READI_FRAMES
:
2702 struct snd_xferi xferi
;
2703 struct snd_xferi __user
*_xferi
= arg
;
2704 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2705 snd_pcm_sframes_t result
;
2706 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2708 if (put_user(0, &_xferi
->result
))
2710 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2712 result
= snd_pcm_lib_read(substream
, xferi
.buf
, xferi
.frames
);
2713 __put_user(result
, &_xferi
->result
);
2714 return result
< 0 ? result
: 0;
2716 case SNDRV_PCM_IOCTL_READN_FRAMES
:
2718 struct snd_xfern xfern
;
2719 struct snd_xfern __user
*_xfern
= arg
;
2720 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2722 snd_pcm_sframes_t result
;
2723 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2725 if (runtime
->channels
> 128)
2727 if (put_user(0, &_xfern
->result
))
2729 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2732 bufs
= memdup_user(xfern
.bufs
,
2733 sizeof(void *) * runtime
->channels
);
2735 return PTR_ERR(bufs
);
2736 result
= snd_pcm_lib_readv(substream
, bufs
, xfern
.frames
);
2738 __put_user(result
, &_xfern
->result
);
2739 return result
< 0 ? result
: 0;
2741 case SNDRV_PCM_IOCTL_REWIND
:
2743 snd_pcm_uframes_t frames
;
2744 snd_pcm_uframes_t __user
*_frames
= arg
;
2745 snd_pcm_sframes_t result
;
2746 if (get_user(frames
, _frames
))
2748 if (put_user(0, _frames
))
2750 result
= snd_pcm_capture_rewind(substream
, frames
);
2751 __put_user(result
, _frames
);
2752 return result
< 0 ? result
: 0;
2754 case SNDRV_PCM_IOCTL_FORWARD
:
2756 snd_pcm_uframes_t frames
;
2757 snd_pcm_uframes_t __user
*_frames
= arg
;
2758 snd_pcm_sframes_t result
;
2759 if (get_user(frames
, _frames
))
2761 if (put_user(0, _frames
))
2763 result
= snd_pcm_capture_forward(substream
, frames
);
2764 __put_user(result
, _frames
);
2765 return result
< 0 ? result
: 0;
2768 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2771 static long snd_pcm_playback_ioctl(struct file
*file
, unsigned int cmd
,
2774 struct snd_pcm_file
*pcm_file
;
2776 pcm_file
= file
->private_data
;
2778 if (((cmd
>> 8) & 0xff) != 'A')
2781 return snd_pcm_playback_ioctl1(file
, pcm_file
->substream
, cmd
,
2782 (void __user
*)arg
);
2785 static long snd_pcm_capture_ioctl(struct file
*file
, unsigned int cmd
,
2788 struct snd_pcm_file
*pcm_file
;
2790 pcm_file
= file
->private_data
;
2792 if (((cmd
>> 8) & 0xff) != 'A')
2795 return snd_pcm_capture_ioctl1(file
, pcm_file
->substream
, cmd
,
2796 (void __user
*)arg
);
2799 int snd_pcm_kernel_ioctl(struct snd_pcm_substream
*substream
,
2800 unsigned int cmd
, void *arg
)
2805 fs
= snd_enter_user();
2806 switch (substream
->stream
) {
2807 case SNDRV_PCM_STREAM_PLAYBACK
:
2808 result
= snd_pcm_playback_ioctl1(NULL
, substream
, cmd
,
2809 (void __user
*)arg
);
2811 case SNDRV_PCM_STREAM_CAPTURE
:
2812 result
= snd_pcm_capture_ioctl1(NULL
, substream
, cmd
,
2813 (void __user
*)arg
);
2823 EXPORT_SYMBOL(snd_pcm_kernel_ioctl
);
2825 static ssize_t
snd_pcm_read(struct file
*file
, char __user
*buf
, size_t count
,
2828 struct snd_pcm_file
*pcm_file
;
2829 struct snd_pcm_substream
*substream
;
2830 struct snd_pcm_runtime
*runtime
;
2831 snd_pcm_sframes_t result
;
2833 pcm_file
= file
->private_data
;
2834 substream
= pcm_file
->substream
;
2835 if (PCM_RUNTIME_CHECK(substream
))
2837 runtime
= substream
->runtime
;
2838 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2840 if (!frame_aligned(runtime
, count
))
2842 count
= bytes_to_frames(runtime
, count
);
2843 result
= snd_pcm_lib_read(substream
, buf
, count
);
2845 result
= frames_to_bytes(runtime
, result
);
2849 static ssize_t
snd_pcm_write(struct file
*file
, const char __user
*buf
,
2850 size_t count
, loff_t
* offset
)
2852 struct snd_pcm_file
*pcm_file
;
2853 struct snd_pcm_substream
*substream
;
2854 struct snd_pcm_runtime
*runtime
;
2855 snd_pcm_sframes_t result
;
2857 pcm_file
= file
->private_data
;
2858 substream
= pcm_file
->substream
;
2859 if (PCM_RUNTIME_CHECK(substream
))
2861 runtime
= substream
->runtime
;
2862 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2864 if (!frame_aligned(runtime
, count
))
2866 count
= bytes_to_frames(runtime
, count
);
2867 result
= snd_pcm_lib_write(substream
, buf
, count
);
2869 result
= frames_to_bytes(runtime
, result
);
2873 static ssize_t
snd_pcm_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
2874 unsigned long nr_segs
, loff_t pos
)
2877 struct snd_pcm_file
*pcm_file
;
2878 struct snd_pcm_substream
*substream
;
2879 struct snd_pcm_runtime
*runtime
;
2880 snd_pcm_sframes_t result
;
2883 snd_pcm_uframes_t frames
;
2885 pcm_file
= iocb
->ki_filp
->private_data
;
2886 substream
= pcm_file
->substream
;
2887 if (PCM_RUNTIME_CHECK(substream
))
2889 runtime
= substream
->runtime
;
2890 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2892 if (nr_segs
> 1024 || nr_segs
!= runtime
->channels
)
2894 if (!frame_aligned(runtime
, iov
->iov_len
))
2896 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2897 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2900 for (i
= 0; i
< nr_segs
; ++i
)
2901 bufs
[i
] = iov
[i
].iov_base
;
2902 result
= snd_pcm_lib_readv(substream
, bufs
, frames
);
2904 result
= frames_to_bytes(runtime
, result
);
2909 static ssize_t
snd_pcm_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
2910 unsigned long nr_segs
, loff_t pos
)
2912 struct snd_pcm_file
*pcm_file
;
2913 struct snd_pcm_substream
*substream
;
2914 struct snd_pcm_runtime
*runtime
;
2915 snd_pcm_sframes_t result
;
2918 snd_pcm_uframes_t frames
;
2920 pcm_file
= iocb
->ki_filp
->private_data
;
2921 substream
= pcm_file
->substream
;
2922 if (PCM_RUNTIME_CHECK(substream
))
2924 runtime
= substream
->runtime
;
2925 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2927 if (nr_segs
> 128 || nr_segs
!= runtime
->channels
||
2928 !frame_aligned(runtime
, iov
->iov_len
))
2930 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2931 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2934 for (i
= 0; i
< nr_segs
; ++i
)
2935 bufs
[i
] = iov
[i
].iov_base
;
2936 result
= snd_pcm_lib_writev(substream
, bufs
, frames
);
2938 result
= frames_to_bytes(runtime
, result
);
2943 static unsigned int snd_pcm_playback_poll(struct file
*file
, poll_table
* wait
)
2945 struct snd_pcm_file
*pcm_file
;
2946 struct snd_pcm_substream
*substream
;
2947 struct snd_pcm_runtime
*runtime
;
2949 snd_pcm_uframes_t avail
;
2951 pcm_file
= file
->private_data
;
2953 substream
= pcm_file
->substream
;
2954 if (PCM_RUNTIME_CHECK(substream
))
2956 runtime
= substream
->runtime
;
2958 poll_wait(file
, &runtime
->sleep
, wait
);
2960 snd_pcm_stream_lock_irq(substream
);
2961 avail
= snd_pcm_playback_avail(runtime
);
2962 switch (runtime
->status
->state
) {
2963 case SNDRV_PCM_STATE_RUNNING
:
2964 case SNDRV_PCM_STATE_PREPARED
:
2965 case SNDRV_PCM_STATE_PAUSED
:
2966 if (avail
>= runtime
->control
->avail_min
) {
2967 mask
= POLLOUT
| POLLWRNORM
;
2971 case SNDRV_PCM_STATE_DRAINING
:
2975 mask
= POLLOUT
| POLLWRNORM
| POLLERR
;
2978 snd_pcm_stream_unlock_irq(substream
);
2982 static unsigned int snd_pcm_capture_poll(struct file
*file
, poll_table
* wait
)
2984 struct snd_pcm_file
*pcm_file
;
2985 struct snd_pcm_substream
*substream
;
2986 struct snd_pcm_runtime
*runtime
;
2988 snd_pcm_uframes_t avail
;
2990 pcm_file
= file
->private_data
;
2992 substream
= pcm_file
->substream
;
2993 if (PCM_RUNTIME_CHECK(substream
))
2995 runtime
= substream
->runtime
;
2997 poll_wait(file
, &runtime
->sleep
, wait
);
2999 snd_pcm_stream_lock_irq(substream
);
3000 avail
= snd_pcm_capture_avail(runtime
);
3001 switch (runtime
->status
->state
) {
3002 case SNDRV_PCM_STATE_RUNNING
:
3003 case SNDRV_PCM_STATE_PREPARED
:
3004 case SNDRV_PCM_STATE_PAUSED
:
3005 if (avail
>= runtime
->control
->avail_min
) {
3006 mask
= POLLIN
| POLLRDNORM
;
3011 case SNDRV_PCM_STATE_DRAINING
:
3013 mask
= POLLIN
| POLLRDNORM
;
3018 mask
= POLLIN
| POLLRDNORM
| POLLERR
;
3021 snd_pcm_stream_unlock_irq(substream
);
3030 * Only on coherent architectures, we can mmap the status and the control records
3031 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3033 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3035 * mmap status record
3037 static int snd_pcm_mmap_status_fault(struct vm_area_struct
*area
,
3038 struct vm_fault
*vmf
)
3040 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3041 struct snd_pcm_runtime
*runtime
;
3043 if (substream
== NULL
)
3044 return VM_FAULT_SIGBUS
;
3045 runtime
= substream
->runtime
;
3046 vmf
->page
= virt_to_page(runtime
->status
);
3047 get_page(vmf
->page
);
3051 static const struct vm_operations_struct snd_pcm_vm_ops_status
=
3053 .fault
= snd_pcm_mmap_status_fault
,
3056 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3057 struct vm_area_struct
*area
)
3060 if (!(area
->vm_flags
& VM_READ
))
3062 size
= area
->vm_end
- area
->vm_start
;
3063 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)))
3065 area
->vm_ops
= &snd_pcm_vm_ops_status
;
3066 area
->vm_private_data
= substream
;
3067 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3072 * mmap control record
3074 static int snd_pcm_mmap_control_fault(struct vm_area_struct
*area
,
3075 struct vm_fault
*vmf
)
3077 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3078 struct snd_pcm_runtime
*runtime
;
3080 if (substream
== NULL
)
3081 return VM_FAULT_SIGBUS
;
3082 runtime
= substream
->runtime
;
3083 vmf
->page
= virt_to_page(runtime
->control
);
3084 get_page(vmf
->page
);
3088 static const struct vm_operations_struct snd_pcm_vm_ops_control
=
3090 .fault
= snd_pcm_mmap_control_fault
,
3093 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3094 struct vm_area_struct
*area
)
3097 if (!(area
->vm_flags
& VM_READ
))
3099 size
= area
->vm_end
- area
->vm_start
;
3100 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
)))
3102 area
->vm_ops
= &snd_pcm_vm_ops_control
;
3103 area
->vm_private_data
= substream
;
3104 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3107 #else /* ! coherent mmap */
3109 * don't support mmap for status and control records.
3111 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3112 struct vm_area_struct
*area
)
3116 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3117 struct vm_area_struct
*area
)
3121 #endif /* coherent mmap */
3123 static inline struct page
*
3124 snd_pcm_default_page_ops(struct snd_pcm_substream
*substream
, unsigned long ofs
)
3126 void *vaddr
= substream
->runtime
->dma_area
+ ofs
;
3127 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3128 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3129 return virt_to_page(CAC_ADDR(vaddr
));
3131 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3132 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
) {
3133 dma_addr_t addr
= substream
->runtime
->dma_addr
+ ofs
;
3134 addr
-= get_dma_offset(substream
->dma_buffer
.dev
.dev
);
3135 /* assume dma_handle set via pfn_to_phys() in
3136 * mm/dma-noncoherent.c
3138 return pfn_to_page(addr
>> PAGE_SHIFT
);
3141 return virt_to_page(vaddr
);
3145 * fault callback for mmapping a RAM page
3147 static int snd_pcm_mmap_data_fault(struct vm_area_struct
*area
,
3148 struct vm_fault
*vmf
)
3150 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3151 struct snd_pcm_runtime
*runtime
;
3152 unsigned long offset
;
3156 if (substream
== NULL
)
3157 return VM_FAULT_SIGBUS
;
3158 runtime
= substream
->runtime
;
3159 offset
= vmf
->pgoff
<< PAGE_SHIFT
;
3160 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3161 if (offset
> dma_bytes
- PAGE_SIZE
)
3162 return VM_FAULT_SIGBUS
;
3163 if (substream
->ops
->page
)
3164 page
= substream
->ops
->page(substream
, offset
);
3166 page
= snd_pcm_default_page_ops(substream
, offset
);
3168 return VM_FAULT_SIGBUS
;
3174 static const struct vm_operations_struct snd_pcm_vm_ops_data
= {
3175 .open
= snd_pcm_mmap_data_open
,
3176 .close
= snd_pcm_mmap_data_close
,
3179 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault
= {
3180 .open
= snd_pcm_mmap_data_open
,
3181 .close
= snd_pcm_mmap_data_close
,
3182 .fault
= snd_pcm_mmap_data_fault
,
3185 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3186 /* This should be defined / handled globally! */
3188 #define ARCH_HAS_DMA_MMAP_COHERENT
3193 * mmap the DMA buffer on RAM
3195 int snd_pcm_lib_default_mmap(struct snd_pcm_substream
*substream
,
3196 struct vm_area_struct
*area
)
3198 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3199 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3200 if (!substream
->ops
->page
&&
3201 substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3202 return dma_mmap_coherent(substream
->dma_buffer
.dev
.dev
,
3204 substream
->runtime
->dma_area
,
3205 substream
->runtime
->dma_addr
,
3206 area
->vm_end
- area
->vm_start
);
3207 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3208 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
&&
3209 !plat_device_is_coherent(substream
->dma_buffer
.dev
.dev
))
3210 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3211 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3212 /* mmap with fault handler */
3213 area
->vm_ops
= &snd_pcm_vm_ops_data_fault
;
3216 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap
);
3219 * mmap the DMA buffer on I/O memory area
3221 #if SNDRV_PCM_INFO_MMAP_IOMEM
3222 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream
*substream
,
3223 struct vm_area_struct
*area
)
3226 unsigned long offset
;
3228 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3229 area
->vm_flags
|= VM_IO
;
3230 size
= area
->vm_end
- area
->vm_start
;
3231 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3232 if (io_remap_pfn_range(area
, area
->vm_start
,
3233 (substream
->runtime
->dma_addr
+ offset
) >> PAGE_SHIFT
,
3234 size
, area
->vm_page_prot
))
3239 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem
);
3240 #endif /* SNDRV_PCM_INFO_MMAP */
3245 int snd_pcm_mmap_data(struct snd_pcm_substream
*substream
, struct file
*file
,
3246 struct vm_area_struct
*area
)
3248 struct snd_pcm_runtime
*runtime
;
3250 unsigned long offset
;
3254 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
3255 if (!(area
->vm_flags
& (VM_WRITE
|VM_READ
)))
3258 if (!(area
->vm_flags
& VM_READ
))
3261 runtime
= substream
->runtime
;
3262 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3264 if (!(runtime
->info
& SNDRV_PCM_INFO_MMAP
))
3266 if (runtime
->access
== SNDRV_PCM_ACCESS_RW_INTERLEAVED
||
3267 runtime
->access
== SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
)
3269 size
= area
->vm_end
- area
->vm_start
;
3270 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3271 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3272 if ((size_t)size
> dma_bytes
)
3274 if (offset
> dma_bytes
- size
)
3277 area
->vm_ops
= &snd_pcm_vm_ops_data
;
3278 area
->vm_private_data
= substream
;
3279 if (substream
->ops
->mmap
)
3280 err
= substream
->ops
->mmap(substream
, area
);
3282 err
= snd_pcm_lib_default_mmap(substream
, area
);
3284 atomic_inc(&substream
->mmap_count
);
3288 EXPORT_SYMBOL(snd_pcm_mmap_data
);
3290 static int snd_pcm_mmap(struct file
*file
, struct vm_area_struct
*area
)
3292 struct snd_pcm_file
* pcm_file
;
3293 struct snd_pcm_substream
*substream
;
3294 unsigned long offset
;
3296 pcm_file
= file
->private_data
;
3297 substream
= pcm_file
->substream
;
3298 if (PCM_RUNTIME_CHECK(substream
))
3301 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3303 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3304 if (pcm_file
->no_compat_mmap
)
3306 return snd_pcm_mmap_status(substream
, file
, area
);
3307 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3308 if (pcm_file
->no_compat_mmap
)
3310 return snd_pcm_mmap_control(substream
, file
, area
);
3312 return snd_pcm_mmap_data(substream
, file
, area
);
3317 static int snd_pcm_fasync(int fd
, struct file
* file
, int on
)
3319 struct snd_pcm_file
* pcm_file
;
3320 struct snd_pcm_substream
*substream
;
3321 struct snd_pcm_runtime
*runtime
;
3323 pcm_file
= file
->private_data
;
3324 substream
= pcm_file
->substream
;
3325 if (PCM_RUNTIME_CHECK(substream
))
3327 runtime
= substream
->runtime
;
3328 return fasync_helper(fd
, file
, on
, &runtime
->fasync
);
3334 #ifdef CONFIG_COMPAT
3335 #include "pcm_compat.c"
3337 #define snd_pcm_ioctl_compat NULL
3341 * To be removed helpers to keep binary compatibility
3344 #ifdef CONFIG_SND_SUPPORT_OLD_API
3345 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3346 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3348 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params
*params
,
3349 struct snd_pcm_hw_params_old
*oparams
)
3353 memset(params
, 0, sizeof(*params
));
3354 params
->flags
= oparams
->flags
;
3355 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3356 params
->masks
[i
].bits
[0] = oparams
->masks
[i
];
3357 memcpy(params
->intervals
, oparams
->intervals
, sizeof(oparams
->intervals
));
3358 params
->rmask
= __OLD_TO_NEW_MASK(oparams
->rmask
);
3359 params
->cmask
= __OLD_TO_NEW_MASK(oparams
->cmask
);
3360 params
->info
= oparams
->info
;
3361 params
->msbits
= oparams
->msbits
;
3362 params
->rate_num
= oparams
->rate_num
;
3363 params
->rate_den
= oparams
->rate_den
;
3364 params
->fifo_size
= oparams
->fifo_size
;
3367 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old
*oparams
,
3368 struct snd_pcm_hw_params
*params
)
3372 memset(oparams
, 0, sizeof(*oparams
));
3373 oparams
->flags
= params
->flags
;
3374 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3375 oparams
->masks
[i
] = params
->masks
[i
].bits
[0];
3376 memcpy(oparams
->intervals
, params
->intervals
, sizeof(oparams
->intervals
));
3377 oparams
->rmask
= __NEW_TO_OLD_MASK(params
->rmask
);
3378 oparams
->cmask
= __NEW_TO_OLD_MASK(params
->cmask
);
3379 oparams
->info
= params
->info
;
3380 oparams
->msbits
= params
->msbits
;
3381 oparams
->rate_num
= params
->rate_num
;
3382 oparams
->rate_den
= params
->rate_den
;
3383 oparams
->fifo_size
= params
->fifo_size
;
3386 static int snd_pcm_hw_refine_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
);
3397 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3398 if (IS_ERR(oparams
)) {
3399 err
= PTR_ERR(oparams
);
3402 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3403 err
= snd_pcm_hw_refine(substream
, params
);
3404 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3405 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3416 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
3417 struct snd_pcm_hw_params_old __user
* _oparams
)
3419 struct snd_pcm_hw_params
*params
;
3420 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3423 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3427 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3428 if (IS_ERR(oparams
)) {
3429 err
= PTR_ERR(oparams
);
3432 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3433 err
= snd_pcm_hw_params(substream
, params
);
3434 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3435 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3445 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3448 static unsigned long snd_pcm_get_unmapped_area(struct file
*file
,
3451 unsigned long pgoff
,
3452 unsigned long flags
)
3454 struct snd_pcm_file
*pcm_file
= file
->private_data
;
3455 struct snd_pcm_substream
*substream
= pcm_file
->substream
;
3456 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
3457 unsigned long offset
= pgoff
<< PAGE_SHIFT
;
3460 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3461 return (unsigned long)runtime
->status
;
3462 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3463 return (unsigned long)runtime
->control
;
3465 return (unsigned long)runtime
->dma_area
+ offset
;
3469 # define snd_pcm_get_unmapped_area NULL
3476 const struct file_operations snd_pcm_f_ops
[2] = {
3478 .owner
= THIS_MODULE
,
3479 .write
= snd_pcm_write
,
3480 .aio_write
= snd_pcm_aio_write
,
3481 .open
= snd_pcm_playback_open
,
3482 .release
= snd_pcm_release
,
3483 .llseek
= no_llseek
,
3484 .poll
= snd_pcm_playback_poll
,
3485 .unlocked_ioctl
= snd_pcm_playback_ioctl
,
3486 .compat_ioctl
= snd_pcm_ioctl_compat
,
3487 .mmap
= snd_pcm_mmap
,
3488 .fasync
= snd_pcm_fasync
,
3489 .get_unmapped_area
= snd_pcm_get_unmapped_area
,
3492 .owner
= THIS_MODULE
,
3493 .read
= snd_pcm_read
,
3494 .aio_read
= snd_pcm_aio_read
,
3495 .open
= snd_pcm_capture_open
,
3496 .release
= snd_pcm_release
,
3497 .llseek
= no_llseek
,
3498 .poll
= snd_pcm_capture_poll
,
3499 .unlocked_ioctl
= snd_pcm_capture_ioctl
,
3500 .compat_ioctl
= snd_pcm_ioctl_compat
,
3501 .mmap
= snd_pcm_mmap
,
3502 .fasync
= snd_pcm_fasync
,
3503 .get_unmapped_area
= snd_pcm_get_unmapped_area
,