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
;
608 snd_pcm_gettime(runtime
, &status
->tstamp
);
610 status
->appl_ptr
= runtime
->control
->appl_ptr
;
611 status
->hw_ptr
= runtime
->status
->hw_ptr
;
612 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
613 status
->avail
= snd_pcm_playback_avail(runtime
);
614 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
||
615 runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
616 status
->delay
= runtime
->buffer_size
- status
->avail
;
617 status
->delay
+= runtime
->delay
;
621 status
->avail
= snd_pcm_capture_avail(runtime
);
622 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
)
623 status
->delay
= status
->avail
+ runtime
->delay
;
627 status
->avail_max
= runtime
->avail_max
;
628 status
->overrange
= runtime
->overrange
;
629 runtime
->avail_max
= 0;
630 runtime
->overrange
= 0;
632 snd_pcm_stream_unlock_irq(substream
);
636 static int snd_pcm_status_user(struct snd_pcm_substream
*substream
,
637 struct snd_pcm_status __user
* _status
)
639 struct snd_pcm_status status
;
642 memset(&status
, 0, sizeof(status
));
643 res
= snd_pcm_status(substream
, &status
);
646 if (copy_to_user(_status
, &status
, sizeof(status
)))
651 static int snd_pcm_channel_info(struct snd_pcm_substream
*substream
,
652 struct snd_pcm_channel_info
* info
)
654 struct snd_pcm_runtime
*runtime
;
655 unsigned int channel
;
657 channel
= info
->channel
;
658 runtime
= substream
->runtime
;
659 snd_pcm_stream_lock_irq(substream
);
660 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
661 snd_pcm_stream_unlock_irq(substream
);
664 snd_pcm_stream_unlock_irq(substream
);
665 if (channel
>= runtime
->channels
)
667 memset(info
, 0, sizeof(*info
));
668 info
->channel
= channel
;
669 return substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_CHANNEL_INFO
, info
);
672 static int snd_pcm_channel_info_user(struct snd_pcm_substream
*substream
,
673 struct snd_pcm_channel_info __user
* _info
)
675 struct snd_pcm_channel_info info
;
678 if (copy_from_user(&info
, _info
, sizeof(info
)))
680 res
= snd_pcm_channel_info(substream
, &info
);
683 if (copy_to_user(_info
, &info
, sizeof(info
)))
688 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream
*substream
)
690 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
691 if (runtime
->trigger_master
== NULL
)
693 if (runtime
->trigger_master
== substream
) {
694 snd_pcm_gettime(runtime
, &runtime
->trigger_tstamp
);
696 snd_pcm_trigger_tstamp(runtime
->trigger_master
);
697 runtime
->trigger_tstamp
= runtime
->trigger_master
->runtime
->trigger_tstamp
;
699 runtime
->trigger_master
= NULL
;
703 int (*pre_action
)(struct snd_pcm_substream
*substream
, int state
);
704 int (*do_action
)(struct snd_pcm_substream
*substream
, int state
);
705 void (*undo_action
)(struct snd_pcm_substream
*substream
, int state
);
706 void (*post_action
)(struct snd_pcm_substream
*substream
, int state
);
710 * this functions is core for handling of linked stream
711 * Note: the stream state might be changed also on failure
712 * Note2: call with calling stream lock + link lock
714 static int snd_pcm_action_group(struct action_ops
*ops
,
715 struct snd_pcm_substream
*substream
,
716 int state
, int do_lock
)
718 struct snd_pcm_substream
*s
= NULL
;
719 struct snd_pcm_substream
*s1
;
722 snd_pcm_group_for_each_entry(s
, substream
) {
723 if (do_lock
&& s
!= substream
)
724 spin_lock_nested(&s
->self_group
.lock
,
725 SINGLE_DEPTH_NESTING
);
726 res
= ops
->pre_action(s
, state
);
730 snd_pcm_group_for_each_entry(s
, substream
) {
731 res
= ops
->do_action(s
, state
);
733 if (ops
->undo_action
) {
734 snd_pcm_group_for_each_entry(s1
, substream
) {
735 if (s1
== s
) /* failed stream */
737 ops
->undo_action(s1
, state
);
740 s
= NULL
; /* unlock all */
744 snd_pcm_group_for_each_entry(s
, substream
) {
745 ops
->post_action(s
, state
);
750 snd_pcm_group_for_each_entry(s1
, substream
) {
752 spin_unlock(&s1
->self_group
.lock
);
753 if (s1
== s
) /* end */
761 * Note: call with stream lock
763 static int snd_pcm_action_single(struct action_ops
*ops
,
764 struct snd_pcm_substream
*substream
,
769 res
= ops
->pre_action(substream
, state
);
772 res
= ops
->do_action(substream
, state
);
774 ops
->post_action(substream
, state
);
775 else if (ops
->undo_action
)
776 ops
->undo_action(substream
, state
);
781 * Note: call with stream lock
783 static int snd_pcm_action(struct action_ops
*ops
,
784 struct snd_pcm_substream
*substream
,
789 if (snd_pcm_stream_linked(substream
)) {
790 if (!spin_trylock(&substream
->group
->lock
)) {
791 spin_unlock(&substream
->self_group
.lock
);
792 spin_lock(&substream
->group
->lock
);
793 spin_lock(&substream
->self_group
.lock
);
795 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
796 spin_unlock(&substream
->group
->lock
);
798 res
= snd_pcm_action_single(ops
, substream
, state
);
804 * Note: don't use any locks before
806 static int snd_pcm_action_lock_irq(struct action_ops
*ops
,
807 struct snd_pcm_substream
*substream
,
812 read_lock_irq(&snd_pcm_link_rwlock
);
813 if (snd_pcm_stream_linked(substream
)) {
814 spin_lock(&substream
->group
->lock
);
815 spin_lock(&substream
->self_group
.lock
);
816 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
817 spin_unlock(&substream
->self_group
.lock
);
818 spin_unlock(&substream
->group
->lock
);
820 spin_lock(&substream
->self_group
.lock
);
821 res
= snd_pcm_action_single(ops
, substream
, state
);
822 spin_unlock(&substream
->self_group
.lock
);
824 read_unlock_irq(&snd_pcm_link_rwlock
);
830 static int snd_pcm_action_nonatomic(struct action_ops
*ops
,
831 struct snd_pcm_substream
*substream
,
836 down_read(&snd_pcm_link_rwsem
);
837 if (snd_pcm_stream_linked(substream
))
838 res
= snd_pcm_action_group(ops
, substream
, state
, 0);
840 res
= snd_pcm_action_single(ops
, substream
, state
);
841 up_read(&snd_pcm_link_rwsem
);
848 static int snd_pcm_pre_start(struct snd_pcm_substream
*substream
, int state
)
850 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
851 if (runtime
->status
->state
!= SNDRV_PCM_STATE_PREPARED
)
853 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
854 !snd_pcm_playback_data(substream
))
856 runtime
->trigger_master
= substream
;
860 static int snd_pcm_do_start(struct snd_pcm_substream
*substream
, int state
)
862 if (substream
->runtime
->trigger_master
!= substream
)
864 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_START
);
867 static void snd_pcm_undo_start(struct snd_pcm_substream
*substream
, int state
)
869 if (substream
->runtime
->trigger_master
== substream
)
870 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
873 static void snd_pcm_post_start(struct snd_pcm_substream
*substream
, int state
)
875 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
876 snd_pcm_trigger_tstamp(substream
);
877 runtime
->hw_ptr_jiffies
= jiffies
;
878 runtime
->hw_ptr_buffer_jiffies
= (runtime
->buffer_size
* HZ
) /
880 runtime
->status
->state
= state
;
881 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
882 runtime
->silence_size
> 0)
883 snd_pcm_playback_silence(substream
, ULONG_MAX
);
884 if (substream
->timer
)
885 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTART
,
886 &runtime
->trigger_tstamp
);
889 static struct action_ops snd_pcm_action_start
= {
890 .pre_action
= snd_pcm_pre_start
,
891 .do_action
= snd_pcm_do_start
,
892 .undo_action
= snd_pcm_undo_start
,
893 .post_action
= snd_pcm_post_start
897 * snd_pcm_start - start all linked streams
898 * @substream: the PCM substream instance
900 int snd_pcm_start(struct snd_pcm_substream
*substream
)
902 return snd_pcm_action(&snd_pcm_action_start
, substream
,
903 SNDRV_PCM_STATE_RUNNING
);
909 static int snd_pcm_pre_stop(struct snd_pcm_substream
*substream
, int state
)
911 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
912 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
914 runtime
->trigger_master
= substream
;
918 static int snd_pcm_do_stop(struct snd_pcm_substream
*substream
, int state
)
920 if (substream
->runtime
->trigger_master
== substream
&&
921 snd_pcm_running(substream
))
922 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
923 return 0; /* unconditonally stop all substreams */
926 static void snd_pcm_post_stop(struct snd_pcm_substream
*substream
, int state
)
928 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
929 if (runtime
->status
->state
!= state
) {
930 snd_pcm_trigger_tstamp(substream
);
931 if (substream
->timer
)
932 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTOP
,
933 &runtime
->trigger_tstamp
);
934 runtime
->status
->state
= state
;
936 wake_up(&runtime
->sleep
);
937 wake_up(&runtime
->tsleep
);
940 static struct action_ops snd_pcm_action_stop
= {
941 .pre_action
= snd_pcm_pre_stop
,
942 .do_action
= snd_pcm_do_stop
,
943 .post_action
= snd_pcm_post_stop
947 * snd_pcm_stop - try to stop all running streams in the substream group
948 * @substream: the PCM substream instance
949 * @state: PCM state after stopping the stream
951 * The state of each stream is then changed to the given state unconditionally.
953 int snd_pcm_stop(struct snd_pcm_substream
*substream
, snd_pcm_state_t state
)
955 return snd_pcm_action(&snd_pcm_action_stop
, substream
, state
);
958 EXPORT_SYMBOL(snd_pcm_stop
);
961 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
962 * @substream: the PCM substream
964 * After stopping, the state is changed to SETUP.
965 * Unlike snd_pcm_stop(), this affects only the given stream.
967 int snd_pcm_drain_done(struct snd_pcm_substream
*substream
)
969 return snd_pcm_action_single(&snd_pcm_action_stop
, substream
,
970 SNDRV_PCM_STATE_SETUP
);
976 static int snd_pcm_pre_pause(struct snd_pcm_substream
*substream
, int push
)
978 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
979 if (!(runtime
->info
& SNDRV_PCM_INFO_PAUSE
))
982 if (runtime
->status
->state
!= SNDRV_PCM_STATE_RUNNING
)
984 } else if (runtime
->status
->state
!= SNDRV_PCM_STATE_PAUSED
)
986 runtime
->trigger_master
= substream
;
990 static int snd_pcm_do_pause(struct snd_pcm_substream
*substream
, int push
)
992 if (substream
->runtime
->trigger_master
!= substream
)
994 /* some drivers might use hw_ptr to recover from the pause -
995 update the hw_ptr now */
997 snd_pcm_update_hw_ptr(substream
);
998 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
999 * a delta between the current jiffies, this gives a large enough
1000 * delta, effectively to skip the check once.
1002 substream
->runtime
->hw_ptr_jiffies
= jiffies
- HZ
* 1000;
1003 return substream
->ops
->trigger(substream
,
1004 push
? SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
1005 SNDRV_PCM_TRIGGER_PAUSE_RELEASE
);
1008 static void snd_pcm_undo_pause(struct snd_pcm_substream
*substream
, int push
)
1010 if (substream
->runtime
->trigger_master
== substream
)
1011 substream
->ops
->trigger(substream
,
1012 push
? SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1013 SNDRV_PCM_TRIGGER_PAUSE_PUSH
);
1016 static void snd_pcm_post_pause(struct snd_pcm_substream
*substream
, int push
)
1018 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1019 snd_pcm_trigger_tstamp(substream
);
1021 runtime
->status
->state
= SNDRV_PCM_STATE_PAUSED
;
1022 if (substream
->timer
)
1023 snd_timer_notify(substream
->timer
,
1024 SNDRV_TIMER_EVENT_MPAUSE
,
1025 &runtime
->trigger_tstamp
);
1026 wake_up(&runtime
->sleep
);
1027 wake_up(&runtime
->tsleep
);
1029 runtime
->status
->state
= SNDRV_PCM_STATE_RUNNING
;
1030 if (substream
->timer
)
1031 snd_timer_notify(substream
->timer
,
1032 SNDRV_TIMER_EVENT_MCONTINUE
,
1033 &runtime
->trigger_tstamp
);
1037 static struct action_ops snd_pcm_action_pause
= {
1038 .pre_action
= snd_pcm_pre_pause
,
1039 .do_action
= snd_pcm_do_pause
,
1040 .undo_action
= snd_pcm_undo_pause
,
1041 .post_action
= snd_pcm_post_pause
1045 * Push/release the pause for all linked streams.
1047 static int snd_pcm_pause(struct snd_pcm_substream
*substream
, int push
)
1049 return snd_pcm_action(&snd_pcm_action_pause
, substream
, push
);
1055 static int snd_pcm_pre_suspend(struct snd_pcm_substream
*substream
, int state
)
1057 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1058 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1060 runtime
->trigger_master
= substream
;
1064 static int snd_pcm_do_suspend(struct snd_pcm_substream
*substream
, int state
)
1066 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1067 if (runtime
->trigger_master
!= substream
)
1069 if (! snd_pcm_running(substream
))
1071 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1072 return 0; /* suspend unconditionally */
1075 static void snd_pcm_post_suspend(struct snd_pcm_substream
*substream
, int state
)
1077 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1078 snd_pcm_trigger_tstamp(substream
);
1079 if (substream
->timer
)
1080 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSUSPEND
,
1081 &runtime
->trigger_tstamp
);
1082 runtime
->status
->suspended_state
= runtime
->status
->state
;
1083 runtime
->status
->state
= SNDRV_PCM_STATE_SUSPENDED
;
1084 wake_up(&runtime
->sleep
);
1085 wake_up(&runtime
->tsleep
);
1088 static struct action_ops snd_pcm_action_suspend
= {
1089 .pre_action
= snd_pcm_pre_suspend
,
1090 .do_action
= snd_pcm_do_suspend
,
1091 .post_action
= snd_pcm_post_suspend
1095 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1096 * @substream: the PCM substream
1098 * After this call, all streams are changed to SUSPENDED state.
1100 int snd_pcm_suspend(struct snd_pcm_substream
*substream
)
1103 unsigned long flags
;
1108 snd_pcm_stream_lock_irqsave(substream
, flags
);
1109 err
= snd_pcm_action(&snd_pcm_action_suspend
, substream
, 0);
1110 snd_pcm_stream_unlock_irqrestore(substream
, flags
);
1114 EXPORT_SYMBOL(snd_pcm_suspend
);
1117 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1118 * @pcm: the PCM instance
1120 * After this call, all streams are changed to SUSPENDED state.
1122 int snd_pcm_suspend_all(struct snd_pcm
*pcm
)
1124 struct snd_pcm_substream
*substream
;
1125 int stream
, err
= 0;
1130 for (stream
= 0; stream
< 2; stream
++) {
1131 for (substream
= pcm
->streams
[stream
].substream
;
1132 substream
; substream
= substream
->next
) {
1133 /* FIXME: the open/close code should lock this as well */
1134 if (substream
->runtime
== NULL
)
1136 err
= snd_pcm_suspend(substream
);
1137 if (err
< 0 && err
!= -EBUSY
)
1144 EXPORT_SYMBOL(snd_pcm_suspend_all
);
1148 static int snd_pcm_pre_resume(struct snd_pcm_substream
*substream
, int state
)
1150 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1151 if (!(runtime
->info
& SNDRV_PCM_INFO_RESUME
))
1153 runtime
->trigger_master
= substream
;
1157 static int snd_pcm_do_resume(struct snd_pcm_substream
*substream
, int state
)
1159 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1160 if (runtime
->trigger_master
!= substream
)
1162 /* DMA not running previously? */
1163 if (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_RUNNING
&&
1164 (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_DRAINING
||
1165 substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
1167 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_RESUME
);
1170 static void snd_pcm_undo_resume(struct snd_pcm_substream
*substream
, int state
)
1172 if (substream
->runtime
->trigger_master
== substream
&&
1173 snd_pcm_running(substream
))
1174 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1177 static void snd_pcm_post_resume(struct snd_pcm_substream
*substream
, int state
)
1179 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1180 snd_pcm_trigger_tstamp(substream
);
1181 if (substream
->timer
)
1182 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MRESUME
,
1183 &runtime
->trigger_tstamp
);
1184 runtime
->status
->state
= runtime
->status
->suspended_state
;
1187 static struct action_ops snd_pcm_action_resume
= {
1188 .pre_action
= snd_pcm_pre_resume
,
1189 .do_action
= snd_pcm_do_resume
,
1190 .undo_action
= snd_pcm_undo_resume
,
1191 .post_action
= snd_pcm_post_resume
1194 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1196 struct snd_card
*card
= substream
->pcm
->card
;
1199 snd_power_lock(card
);
1200 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1201 res
= snd_pcm_action_lock_irq(&snd_pcm_action_resume
, substream
, 0);
1202 snd_power_unlock(card
);
1208 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1213 #endif /* CONFIG_PM */
1218 * Change the RUNNING stream(s) to XRUN state.
1220 static int snd_pcm_xrun(struct snd_pcm_substream
*substream
)
1222 struct snd_card
*card
= substream
->pcm
->card
;
1223 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1226 snd_power_lock(card
);
1227 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1228 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1233 snd_pcm_stream_lock_irq(substream
);
1234 switch (runtime
->status
->state
) {
1235 case SNDRV_PCM_STATE_XRUN
:
1236 result
= 0; /* already there */
1238 case SNDRV_PCM_STATE_RUNNING
:
1239 result
= snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
1244 snd_pcm_stream_unlock_irq(substream
);
1246 snd_power_unlock(card
);
1253 static int snd_pcm_pre_reset(struct snd_pcm_substream
*substream
, int state
)
1255 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1256 switch (runtime
->status
->state
) {
1257 case SNDRV_PCM_STATE_RUNNING
:
1258 case SNDRV_PCM_STATE_PREPARED
:
1259 case SNDRV_PCM_STATE_PAUSED
:
1260 case SNDRV_PCM_STATE_SUSPENDED
:
1267 static int snd_pcm_do_reset(struct snd_pcm_substream
*substream
, int state
)
1269 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1270 int err
= substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_RESET
, NULL
);
1273 runtime
->hw_ptr_base
= 0;
1274 runtime
->hw_ptr_interrupt
= runtime
->status
->hw_ptr
-
1275 runtime
->status
->hw_ptr
% runtime
->period_size
;
1276 runtime
->silence_start
= runtime
->status
->hw_ptr
;
1277 runtime
->silence_filled
= 0;
1281 static void snd_pcm_post_reset(struct snd_pcm_substream
*substream
, int state
)
1283 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1284 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1285 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
1286 runtime
->silence_size
> 0)
1287 snd_pcm_playback_silence(substream
, ULONG_MAX
);
1290 static struct action_ops snd_pcm_action_reset
= {
1291 .pre_action
= snd_pcm_pre_reset
,
1292 .do_action
= snd_pcm_do_reset
,
1293 .post_action
= snd_pcm_post_reset
1296 static int snd_pcm_reset(struct snd_pcm_substream
*substream
)
1298 return snd_pcm_action_nonatomic(&snd_pcm_action_reset
, substream
, 0);
1304 /* we use the second argument for updating f_flags */
1305 static int snd_pcm_pre_prepare(struct snd_pcm_substream
*substream
,
1308 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1309 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1310 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
)
1312 if (snd_pcm_running(substream
))
1314 substream
->f_flags
= f_flags
;
1318 static int snd_pcm_do_prepare(struct snd_pcm_substream
*substream
, int state
)
1321 err
= substream
->ops
->prepare(substream
);
1324 return snd_pcm_do_reset(substream
, 0);
1327 static void snd_pcm_post_prepare(struct snd_pcm_substream
*substream
, int state
)
1329 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1330 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1331 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_PREPARED
);
1334 static struct action_ops snd_pcm_action_prepare
= {
1335 .pre_action
= snd_pcm_pre_prepare
,
1336 .do_action
= snd_pcm_do_prepare
,
1337 .post_action
= snd_pcm_post_prepare
1341 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1342 * @substream: the PCM substream instance
1343 * @file: file to refer f_flags
1345 static int snd_pcm_prepare(struct snd_pcm_substream
*substream
,
1349 struct snd_card
*card
= substream
->pcm
->card
;
1353 f_flags
= file
->f_flags
;
1355 f_flags
= substream
->f_flags
;
1357 snd_power_lock(card
);
1358 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1359 res
= snd_pcm_action_nonatomic(&snd_pcm_action_prepare
,
1360 substream
, f_flags
);
1361 snd_power_unlock(card
);
1369 static int snd_pcm_pre_drain_init(struct snd_pcm_substream
*substream
, int state
)
1371 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1372 switch (runtime
->status
->state
) {
1373 case SNDRV_PCM_STATE_OPEN
:
1374 case SNDRV_PCM_STATE_DISCONNECTED
:
1375 case SNDRV_PCM_STATE_SUSPENDED
:
1378 runtime
->trigger_master
= substream
;
1382 static int snd_pcm_do_drain_init(struct snd_pcm_substream
*substream
, int state
)
1384 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1385 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
1386 switch (runtime
->status
->state
) {
1387 case SNDRV_PCM_STATE_PREPARED
:
1388 /* start playback stream if possible */
1389 if (! snd_pcm_playback_empty(substream
)) {
1390 snd_pcm_do_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1391 snd_pcm_post_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1394 case SNDRV_PCM_STATE_RUNNING
:
1395 runtime
->status
->state
= SNDRV_PCM_STATE_DRAINING
;
1397 case SNDRV_PCM_STATE_XRUN
:
1398 runtime
->status
->state
= SNDRV_PCM_STATE_SETUP
;
1404 /* stop running stream */
1405 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
) {
1406 int new_state
= snd_pcm_capture_avail(runtime
) > 0 ?
1407 SNDRV_PCM_STATE_DRAINING
: SNDRV_PCM_STATE_SETUP
;
1408 snd_pcm_do_stop(substream
, new_state
);
1409 snd_pcm_post_stop(substream
, new_state
);
1415 static void snd_pcm_post_drain_init(struct snd_pcm_substream
*substream
, int state
)
1419 static struct action_ops snd_pcm_action_drain_init
= {
1420 .pre_action
= snd_pcm_pre_drain_init
,
1421 .do_action
= snd_pcm_do_drain_init
,
1422 .post_action
= snd_pcm_post_drain_init
1425 static int snd_pcm_drop(struct snd_pcm_substream
*substream
);
1428 * Drain the stream(s).
1429 * When the substream is linked, sync until the draining of all playback streams
1431 * After this call, all streams are supposed to be either SETUP or DRAINING
1432 * (capture only) state.
1434 static int snd_pcm_drain(struct snd_pcm_substream
*substream
,
1437 struct snd_card
*card
;
1438 struct snd_pcm_runtime
*runtime
;
1439 struct snd_pcm_substream
*s
;
1444 card
= substream
->pcm
->card
;
1445 runtime
= substream
->runtime
;
1447 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1450 snd_power_lock(card
);
1451 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1452 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1454 snd_power_unlock(card
);
1460 if (file
->f_flags
& O_NONBLOCK
)
1462 } else if (substream
->f_flags
& O_NONBLOCK
)
1465 down_read(&snd_pcm_link_rwsem
);
1466 snd_pcm_stream_lock_irq(substream
);
1468 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1469 snd_pcm_pause(substream
, 0);
1471 /* pre-start/stop - all running streams are changed to DRAINING state */
1472 result
= snd_pcm_action(&snd_pcm_action_drain_init
, substream
, 0);
1475 /* in non-blocking, we don't wait in ioctl but let caller poll */
1483 struct snd_pcm_runtime
*to_check
;
1484 if (signal_pending(current
)) {
1485 result
= -ERESTARTSYS
;
1488 /* find a substream to drain */
1490 snd_pcm_group_for_each_entry(s
, substream
) {
1491 if (s
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
)
1493 runtime
= s
->runtime
;
1494 if (runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
1500 break; /* all drained */
1501 init_waitqueue_entry(&wait
, current
);
1502 add_wait_queue(&to_check
->sleep
, &wait
);
1503 snd_pcm_stream_unlock_irq(substream
);
1504 up_read(&snd_pcm_link_rwsem
);
1505 snd_power_unlock(card
);
1506 if (runtime
->no_period_wakeup
)
1507 tout
= MAX_SCHEDULE_TIMEOUT
;
1510 if (runtime
->rate
) {
1511 long t
= runtime
->period_size
* 2 / runtime
->rate
;
1512 tout
= max(t
, tout
);
1514 tout
= msecs_to_jiffies(tout
* 1000);
1516 tout
= schedule_timeout_interruptible(tout
);
1517 snd_power_lock(card
);
1518 down_read(&snd_pcm_link_rwsem
);
1519 snd_pcm_stream_lock_irq(substream
);
1520 remove_wait_queue(&to_check
->sleep
, &wait
);
1521 if (card
->shutdown
) {
1526 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1529 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1530 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1538 snd_pcm_stream_unlock_irq(substream
);
1539 up_read(&snd_pcm_link_rwsem
);
1540 snd_power_unlock(card
);
1548 * Immediately put all linked substreams into SETUP state.
1550 static int snd_pcm_drop(struct snd_pcm_substream
*substream
)
1552 struct snd_pcm_runtime
*runtime
;
1555 if (PCM_RUNTIME_CHECK(substream
))
1557 runtime
= substream
->runtime
;
1559 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1560 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
||
1561 runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1564 snd_pcm_stream_lock_irq(substream
);
1566 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1567 snd_pcm_pause(substream
, 0);
1569 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1570 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1571 snd_pcm_stream_unlock_irq(substream
);
1577 /* WARNING: Don't forget to fput back the file */
1578 static struct file
*snd_pcm_file_fd(int fd
, int *fput_needed
)
1581 struct inode
*inode
;
1584 file
= fget_light(fd
, fput_needed
);
1587 inode
= file
->f_path
.dentry
->d_inode
;
1588 if (!S_ISCHR(inode
->i_mode
) ||
1589 imajor(inode
) != snd_major
) {
1590 fput_light(file
, *fput_needed
);
1593 minor
= iminor(inode
);
1594 if (!snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_PLAYBACK
) &&
1595 !snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_CAPTURE
)) {
1596 fput_light(file
, *fput_needed
);
1605 static int snd_pcm_link(struct snd_pcm_substream
*substream
, int fd
)
1609 struct snd_pcm_file
*pcm_file
;
1610 struct snd_pcm_substream
*substream1
;
1611 struct snd_pcm_group
*group
;
1614 file
= snd_pcm_file_fd(fd
, &fput_needed
);
1617 pcm_file
= file
->private_data
;
1618 substream1
= pcm_file
->substream
;
1619 group
= kmalloc(sizeof(*group
), GFP_KERNEL
);
1624 down_write(&snd_pcm_link_rwsem
);
1625 write_lock_irq(&snd_pcm_link_rwlock
);
1626 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1627 substream
->runtime
->status
->state
!= substream1
->runtime
->status
->state
) {
1631 if (snd_pcm_stream_linked(substream1
)) {
1635 if (!snd_pcm_stream_linked(substream
)) {
1636 substream
->group
= group
;
1637 spin_lock_init(&substream
->group
->lock
);
1638 INIT_LIST_HEAD(&substream
->group
->substreams
);
1639 list_add_tail(&substream
->link_list
, &substream
->group
->substreams
);
1640 substream
->group
->count
= 1;
1642 list_add_tail(&substream1
->link_list
, &substream
->group
->substreams
);
1643 substream
->group
->count
++;
1644 substream1
->group
= substream
->group
;
1646 write_unlock_irq(&snd_pcm_link_rwlock
);
1647 up_write(&snd_pcm_link_rwsem
);
1649 snd_card_unref(substream1
->pcm
->card
);
1650 fput_light(file
, fput_needed
);
1656 static void relink_to_local(struct snd_pcm_substream
*substream
)
1658 substream
->group
= &substream
->self_group
;
1659 INIT_LIST_HEAD(&substream
->self_group
.substreams
);
1660 list_add_tail(&substream
->link_list
, &substream
->self_group
.substreams
);
1663 static int snd_pcm_unlink(struct snd_pcm_substream
*substream
)
1665 struct snd_pcm_substream
*s
;
1668 down_write(&snd_pcm_link_rwsem
);
1669 write_lock_irq(&snd_pcm_link_rwlock
);
1670 if (!snd_pcm_stream_linked(substream
)) {
1674 list_del(&substream
->link_list
);
1675 substream
->group
->count
--;
1676 if (substream
->group
->count
== 1) { /* detach the last stream, too */
1677 snd_pcm_group_for_each_entry(s
, substream
) {
1681 kfree(substream
->group
);
1683 relink_to_local(substream
);
1685 write_unlock_irq(&snd_pcm_link_rwlock
);
1686 up_write(&snd_pcm_link_rwsem
);
1693 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params
*params
,
1694 struct snd_pcm_hw_rule
*rule
)
1696 struct snd_interval t
;
1697 snd_interval_mul(hw_param_interval_c(params
, rule
->deps
[0]),
1698 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1699 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1702 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params
*params
,
1703 struct snd_pcm_hw_rule
*rule
)
1705 struct snd_interval t
;
1706 snd_interval_div(hw_param_interval_c(params
, rule
->deps
[0]),
1707 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1708 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1711 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params
*params
,
1712 struct snd_pcm_hw_rule
*rule
)
1714 struct snd_interval t
;
1715 snd_interval_muldivk(hw_param_interval_c(params
, rule
->deps
[0]),
1716 hw_param_interval_c(params
, rule
->deps
[1]),
1717 (unsigned long) rule
->private, &t
);
1718 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1721 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params
*params
,
1722 struct snd_pcm_hw_rule
*rule
)
1724 struct snd_interval t
;
1725 snd_interval_mulkdiv(hw_param_interval_c(params
, rule
->deps
[0]),
1726 (unsigned long) rule
->private,
1727 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1728 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1731 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params
*params
,
1732 struct snd_pcm_hw_rule
*rule
)
1735 struct snd_interval
*i
= hw_param_interval(params
, rule
->deps
[0]);
1737 struct snd_mask
*mask
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1739 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1741 if (! snd_mask_test(mask
, k
))
1743 bits
= snd_pcm_format_physical_width(k
);
1745 continue; /* ignore invalid formats */
1746 if ((unsigned)bits
< i
->min
|| (unsigned)bits
> i
->max
)
1747 snd_mask_reset(&m
, k
);
1749 return snd_mask_refine(mask
, &m
);
1752 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params
*params
,
1753 struct snd_pcm_hw_rule
*rule
)
1755 struct snd_interval t
;
1761 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1763 if (! snd_mask_test(hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
), k
))
1765 bits
= snd_pcm_format_physical_width(k
);
1767 continue; /* ignore invalid formats */
1768 if (t
.min
> (unsigned)bits
)
1770 if (t
.max
< (unsigned)bits
)
1774 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1777 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1778 #error "Change this table"
1781 static unsigned int rates
[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1782 48000, 64000, 88200, 96000, 176400, 192000 };
1784 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates
= {
1785 .count
= ARRAY_SIZE(rates
),
1789 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params
*params
,
1790 struct snd_pcm_hw_rule
*rule
)
1792 struct snd_pcm_hardware
*hw
= rule
->private;
1793 return snd_interval_list(hw_param_interval(params
, rule
->var
),
1794 snd_pcm_known_rates
.count
,
1795 snd_pcm_known_rates
.list
, hw
->rates
);
1798 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params
*params
,
1799 struct snd_pcm_hw_rule
*rule
)
1801 struct snd_interval t
;
1802 struct snd_pcm_substream
*substream
= rule
->private;
1804 t
.max
= substream
->buffer_bytes_max
;
1808 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1811 int snd_pcm_hw_constraints_init(struct snd_pcm_substream
*substream
)
1813 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1814 struct snd_pcm_hw_constraints
*constrs
= &runtime
->hw_constraints
;
1817 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
1818 snd_mask_any(constrs_mask(constrs
, k
));
1821 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
1822 snd_interval_any(constrs_interval(constrs
, k
));
1825 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_CHANNELS
));
1826 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
));
1827 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
));
1828 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
));
1829 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_FRAME_BITS
));
1831 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1832 snd_pcm_hw_rule_format
, NULL
,
1833 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1836 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1837 snd_pcm_hw_rule_sample_bits
, NULL
,
1838 SNDRV_PCM_HW_PARAM_FORMAT
,
1839 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1842 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1843 snd_pcm_hw_rule_div
, NULL
,
1844 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1847 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1848 snd_pcm_hw_rule_mul
, NULL
,
1849 SNDRV_PCM_HW_PARAM_SAMPLE_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_mulkdiv
, (void*) 8,
1854 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -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_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, -1);
1862 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
1863 snd_pcm_hw_rule_div
, NULL
,
1864 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1867 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1868 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1869 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
, -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_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_BUFFER_TIME
, -1);
1877 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIODS
,
1878 snd_pcm_hw_rule_div
, NULL
,
1879 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1882 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1883 snd_pcm_hw_rule_div
, NULL
,
1884 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1887 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1888 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1889 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1892 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1893 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1894 SNDRV_PCM_HW_PARAM_PERIOD_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1897 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1898 snd_pcm_hw_rule_mul
, NULL
,
1899 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1902 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1903 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1904 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1907 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1908 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1909 SNDRV_PCM_HW_PARAM_BUFFER_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1912 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1913 snd_pcm_hw_rule_muldivk
, (void*) 8,
1914 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1917 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1918 snd_pcm_hw_rule_muldivk
, (void*) 8,
1919 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1922 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
1923 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1924 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1927 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME
,
1928 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1929 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1935 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream
*substream
)
1937 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1938 struct snd_pcm_hardware
*hw
= &runtime
->hw
;
1940 unsigned int mask
= 0;
1942 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1943 mask
|= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED
;
1944 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1945 mask
|= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
;
1946 if (hw
->info
& SNDRV_PCM_INFO_MMAP
) {
1947 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1948 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED
;
1949 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1950 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED
;
1951 if (hw
->info
& SNDRV_PCM_INFO_COMPLEX
)
1952 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX
;
1954 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_ACCESS
, mask
);
1958 err
= snd_pcm_hw_constraint_mask64(runtime
, SNDRV_PCM_HW_PARAM_FORMAT
, hw
->formats
);
1962 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_SUBFORMAT
, 1 << SNDRV_PCM_SUBFORMAT_STD
);
1966 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_CHANNELS
,
1967 hw
->channels_min
, hw
->channels_max
);
1971 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_RATE
,
1972 hw
->rate_min
, hw
->rate_max
);
1976 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1977 hw
->period_bytes_min
, hw
->period_bytes_max
);
1981 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIODS
,
1982 hw
->periods_min
, hw
->periods_max
);
1986 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1987 hw
->period_bytes_min
, hw
->buffer_bytes_max
);
1991 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1992 snd_pcm_hw_rule_buffer_bytes_max
, substream
,
1993 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, -1);
1998 if (runtime
->dma_bytes
) {
1999 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, 0, runtime
->dma_bytes
);
2004 if (!(hw
->rates
& (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))) {
2005 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
2006 snd_pcm_hw_rule_rate
, hw
,
2007 SNDRV_PCM_HW_PARAM_RATE
, -1);
2012 /* FIXME: this belong to lowlevel */
2013 snd_pcm_hw_constraint_integer(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
);
2018 static void pcm_release_private(struct snd_pcm_substream
*substream
)
2020 snd_pcm_unlink(substream
);
2023 void snd_pcm_release_substream(struct snd_pcm_substream
*substream
)
2025 substream
->ref_count
--;
2026 if (substream
->ref_count
> 0)
2029 snd_pcm_drop(substream
);
2030 if (substream
->hw_opened
) {
2031 if (substream
->ops
->hw_free
!= NULL
)
2032 substream
->ops
->hw_free(substream
);
2033 substream
->ops
->close(substream
);
2034 substream
->hw_opened
= 0;
2036 if (pm_qos_request_active(&substream
->latency_pm_qos_req
))
2037 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
2038 if (substream
->pcm_release
) {
2039 substream
->pcm_release(substream
);
2040 substream
->pcm_release
= NULL
;
2042 snd_pcm_detach_substream(substream
);
2045 EXPORT_SYMBOL(snd_pcm_release_substream
);
2047 int snd_pcm_open_substream(struct snd_pcm
*pcm
, int stream
,
2049 struct snd_pcm_substream
**rsubstream
)
2051 struct snd_pcm_substream
*substream
;
2054 err
= snd_pcm_attach_substream(pcm
, stream
, file
, &substream
);
2057 if (substream
->ref_count
> 1) {
2058 *rsubstream
= substream
;
2062 err
= snd_pcm_hw_constraints_init(substream
);
2064 snd_printd("snd_pcm_hw_constraints_init failed\n");
2068 if ((err
= substream
->ops
->open(substream
)) < 0)
2071 substream
->hw_opened
= 1;
2073 err
= snd_pcm_hw_constraints_complete(substream
);
2075 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2079 *rsubstream
= substream
;
2083 snd_pcm_release_substream(substream
);
2087 EXPORT_SYMBOL(snd_pcm_open_substream
);
2089 static int snd_pcm_open_file(struct file
*file
,
2090 struct snd_pcm
*pcm
,
2093 struct snd_pcm_file
*pcm_file
;
2094 struct snd_pcm_substream
*substream
;
2097 err
= snd_pcm_open_substream(pcm
, stream
, file
, &substream
);
2101 pcm_file
= kzalloc(sizeof(*pcm_file
), GFP_KERNEL
);
2102 if (pcm_file
== NULL
) {
2103 snd_pcm_release_substream(substream
);
2106 pcm_file
->substream
= substream
;
2107 if (substream
->ref_count
== 1) {
2108 substream
->file
= pcm_file
;
2109 substream
->pcm_release
= pcm_release_private
;
2111 file
->private_data
= pcm_file
;
2116 static int snd_pcm_playback_open(struct inode
*inode
, struct file
*file
)
2118 struct snd_pcm
*pcm
;
2119 int err
= nonseekable_open(inode
, file
);
2122 pcm
= snd_lookup_minor_data(iminor(inode
),
2123 SNDRV_DEVICE_TYPE_PCM_PLAYBACK
);
2124 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_PLAYBACK
);
2126 snd_card_unref(pcm
->card
);
2130 static int snd_pcm_capture_open(struct inode
*inode
, struct file
*file
)
2132 struct snd_pcm
*pcm
;
2133 int err
= nonseekable_open(inode
, file
);
2136 pcm
= snd_lookup_minor_data(iminor(inode
),
2137 SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
2138 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_CAPTURE
);
2140 snd_card_unref(pcm
->card
);
2144 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
)
2153 err
= snd_card_file_add(pcm
->card
, file
);
2156 if (!try_module_get(pcm
->card
->module
)) {
2160 init_waitqueue_entry(&wait
, current
);
2161 add_wait_queue(&pcm
->open_wait
, &wait
);
2162 mutex_lock(&pcm
->open_mutex
);
2164 err
= snd_pcm_open_file(file
, pcm
, stream
);
2167 if (err
== -EAGAIN
) {
2168 if (file
->f_flags
& O_NONBLOCK
) {
2174 set_current_state(TASK_INTERRUPTIBLE
);
2175 mutex_unlock(&pcm
->open_mutex
);
2177 mutex_lock(&pcm
->open_mutex
);
2178 if (pcm
->card
->shutdown
) {
2182 if (signal_pending(current
)) {
2187 remove_wait_queue(&pcm
->open_wait
, &wait
);
2188 mutex_unlock(&pcm
->open_mutex
);
2194 module_put(pcm
->card
->module
);
2196 snd_card_file_remove(pcm
->card
, file
);
2201 static int snd_pcm_release(struct inode
*inode
, struct file
*file
)
2203 struct snd_pcm
*pcm
;
2204 struct snd_pcm_substream
*substream
;
2205 struct snd_pcm_file
*pcm_file
;
2207 pcm_file
= file
->private_data
;
2208 substream
= pcm_file
->substream
;
2209 if (snd_BUG_ON(!substream
))
2211 pcm
= substream
->pcm
;
2212 mutex_lock(&pcm
->open_mutex
);
2213 snd_pcm_release_substream(substream
);
2215 mutex_unlock(&pcm
->open_mutex
);
2216 wake_up(&pcm
->open_wait
);
2217 module_put(pcm
->card
->module
);
2218 snd_card_file_remove(pcm
->card
, file
);
2222 static snd_pcm_sframes_t
snd_pcm_playback_rewind(struct snd_pcm_substream
*substream
,
2223 snd_pcm_uframes_t frames
)
2225 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2226 snd_pcm_sframes_t appl_ptr
;
2227 snd_pcm_sframes_t ret
;
2228 snd_pcm_sframes_t hw_avail
;
2233 snd_pcm_stream_lock_irq(substream
);
2234 switch (runtime
->status
->state
) {
2235 case SNDRV_PCM_STATE_PREPARED
:
2237 case SNDRV_PCM_STATE_DRAINING
:
2238 case SNDRV_PCM_STATE_RUNNING
:
2239 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2242 case SNDRV_PCM_STATE_XRUN
:
2245 case SNDRV_PCM_STATE_SUSPENDED
:
2253 hw_avail
= snd_pcm_playback_hw_avail(runtime
);
2254 if (hw_avail
<= 0) {
2258 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2260 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2262 appl_ptr
+= runtime
->boundary
;
2263 runtime
->control
->appl_ptr
= appl_ptr
;
2266 snd_pcm_stream_unlock_irq(substream
);
2270 static snd_pcm_sframes_t
snd_pcm_capture_rewind(struct snd_pcm_substream
*substream
,
2271 snd_pcm_uframes_t frames
)
2273 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2274 snd_pcm_sframes_t appl_ptr
;
2275 snd_pcm_sframes_t ret
;
2276 snd_pcm_sframes_t hw_avail
;
2281 snd_pcm_stream_lock_irq(substream
);
2282 switch (runtime
->status
->state
) {
2283 case SNDRV_PCM_STATE_PREPARED
:
2284 case SNDRV_PCM_STATE_DRAINING
:
2286 case SNDRV_PCM_STATE_RUNNING
:
2287 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2290 case SNDRV_PCM_STATE_XRUN
:
2293 case SNDRV_PCM_STATE_SUSPENDED
:
2301 hw_avail
= snd_pcm_capture_hw_avail(runtime
);
2302 if (hw_avail
<= 0) {
2306 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2308 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2310 appl_ptr
+= runtime
->boundary
;
2311 runtime
->control
->appl_ptr
= appl_ptr
;
2314 snd_pcm_stream_unlock_irq(substream
);
2318 static snd_pcm_sframes_t
snd_pcm_playback_forward(struct snd_pcm_substream
*substream
,
2319 snd_pcm_uframes_t frames
)
2321 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2322 snd_pcm_sframes_t appl_ptr
;
2323 snd_pcm_sframes_t ret
;
2324 snd_pcm_sframes_t avail
;
2329 snd_pcm_stream_lock_irq(substream
);
2330 switch (runtime
->status
->state
) {
2331 case SNDRV_PCM_STATE_PREPARED
:
2332 case SNDRV_PCM_STATE_PAUSED
:
2334 case SNDRV_PCM_STATE_DRAINING
:
2335 case SNDRV_PCM_STATE_RUNNING
:
2336 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2339 case SNDRV_PCM_STATE_XRUN
:
2342 case SNDRV_PCM_STATE_SUSPENDED
:
2350 avail
= snd_pcm_playback_avail(runtime
);
2355 if (frames
> (snd_pcm_uframes_t
)avail
)
2357 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2358 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2359 appl_ptr
-= runtime
->boundary
;
2360 runtime
->control
->appl_ptr
= appl_ptr
;
2363 snd_pcm_stream_unlock_irq(substream
);
2367 static snd_pcm_sframes_t
snd_pcm_capture_forward(struct snd_pcm_substream
*substream
,
2368 snd_pcm_uframes_t frames
)
2370 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2371 snd_pcm_sframes_t appl_ptr
;
2372 snd_pcm_sframes_t ret
;
2373 snd_pcm_sframes_t avail
;
2378 snd_pcm_stream_lock_irq(substream
);
2379 switch (runtime
->status
->state
) {
2380 case SNDRV_PCM_STATE_PREPARED
:
2381 case SNDRV_PCM_STATE_DRAINING
:
2382 case SNDRV_PCM_STATE_PAUSED
:
2384 case SNDRV_PCM_STATE_RUNNING
:
2385 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2388 case SNDRV_PCM_STATE_XRUN
:
2391 case SNDRV_PCM_STATE_SUSPENDED
:
2399 avail
= snd_pcm_capture_avail(runtime
);
2404 if (frames
> (snd_pcm_uframes_t
)avail
)
2406 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2407 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2408 appl_ptr
-= runtime
->boundary
;
2409 runtime
->control
->appl_ptr
= appl_ptr
;
2412 snd_pcm_stream_unlock_irq(substream
);
2416 static int snd_pcm_hwsync(struct snd_pcm_substream
*substream
)
2418 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2421 snd_pcm_stream_lock_irq(substream
);
2422 switch (runtime
->status
->state
) {
2423 case SNDRV_PCM_STATE_DRAINING
:
2424 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2426 case SNDRV_PCM_STATE_RUNNING
:
2427 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2430 case SNDRV_PCM_STATE_PREPARED
:
2431 case SNDRV_PCM_STATE_SUSPENDED
:
2434 case SNDRV_PCM_STATE_XRUN
:
2442 snd_pcm_stream_unlock_irq(substream
);
2446 static int snd_pcm_delay(struct snd_pcm_substream
*substream
,
2447 snd_pcm_sframes_t __user
*res
)
2449 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2451 snd_pcm_sframes_t n
= 0;
2453 snd_pcm_stream_lock_irq(substream
);
2454 switch (runtime
->status
->state
) {
2455 case SNDRV_PCM_STATE_DRAINING
:
2456 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2458 case SNDRV_PCM_STATE_RUNNING
:
2459 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2462 case SNDRV_PCM_STATE_PREPARED
:
2463 case SNDRV_PCM_STATE_SUSPENDED
:
2465 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2466 n
= snd_pcm_playback_hw_avail(runtime
);
2468 n
= snd_pcm_capture_avail(runtime
);
2469 n
+= runtime
->delay
;
2471 case SNDRV_PCM_STATE_XRUN
:
2479 snd_pcm_stream_unlock_irq(substream
);
2481 if (put_user(n
, res
))
2486 static int snd_pcm_sync_ptr(struct snd_pcm_substream
*substream
,
2487 struct snd_pcm_sync_ptr __user
*_sync_ptr
)
2489 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2490 struct snd_pcm_sync_ptr sync_ptr
;
2491 volatile struct snd_pcm_mmap_status
*status
;
2492 volatile struct snd_pcm_mmap_control
*control
;
2495 memset(&sync_ptr
, 0, sizeof(sync_ptr
));
2496 if (get_user(sync_ptr
.flags
, (unsigned __user
*)&(_sync_ptr
->flags
)))
2498 if (copy_from_user(&sync_ptr
.c
.control
, &(_sync_ptr
->c
.control
), sizeof(struct snd_pcm_mmap_control
)))
2500 status
= runtime
->status
;
2501 control
= runtime
->control
;
2502 if (sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_HWSYNC
) {
2503 err
= snd_pcm_hwsync(substream
);
2507 snd_pcm_stream_lock_irq(substream
);
2508 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_APPL
))
2509 control
->appl_ptr
= sync_ptr
.c
.control
.appl_ptr
;
2511 sync_ptr
.c
.control
.appl_ptr
= control
->appl_ptr
;
2512 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_AVAIL_MIN
))
2513 control
->avail_min
= sync_ptr
.c
.control
.avail_min
;
2515 sync_ptr
.c
.control
.avail_min
= control
->avail_min
;
2516 sync_ptr
.s
.status
.state
= status
->state
;
2517 sync_ptr
.s
.status
.hw_ptr
= status
->hw_ptr
;
2518 sync_ptr
.s
.status
.tstamp
= status
->tstamp
;
2519 sync_ptr
.s
.status
.suspended_state
= status
->suspended_state
;
2520 snd_pcm_stream_unlock_irq(substream
);
2521 if (copy_to_user(_sync_ptr
, &sync_ptr
, sizeof(sync_ptr
)))
2526 static int snd_pcm_tstamp(struct snd_pcm_substream
*substream
, int __user
*_arg
)
2528 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2531 if (get_user(arg
, _arg
))
2533 if (arg
< 0 || arg
> SNDRV_PCM_TSTAMP_TYPE_LAST
)
2535 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY
;
2536 if (arg
== SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
)
2537 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
;
2541 static int snd_pcm_common_ioctl1(struct file
*file
,
2542 struct snd_pcm_substream
*substream
,
2543 unsigned int cmd
, void __user
*arg
)
2546 case SNDRV_PCM_IOCTL_PVERSION
:
2547 return put_user(SNDRV_PCM_VERSION
, (int __user
*)arg
) ? -EFAULT
: 0;
2548 case SNDRV_PCM_IOCTL_INFO
:
2549 return snd_pcm_info_user(substream
, arg
);
2550 case SNDRV_PCM_IOCTL_TSTAMP
: /* just for compatibility */
2552 case SNDRV_PCM_IOCTL_TTSTAMP
:
2553 return snd_pcm_tstamp(substream
, arg
);
2554 case SNDRV_PCM_IOCTL_HW_REFINE
:
2555 return snd_pcm_hw_refine_user(substream
, arg
);
2556 case SNDRV_PCM_IOCTL_HW_PARAMS
:
2557 return snd_pcm_hw_params_user(substream
, arg
);
2558 case SNDRV_PCM_IOCTL_HW_FREE
:
2559 return snd_pcm_hw_free(substream
);
2560 case SNDRV_PCM_IOCTL_SW_PARAMS
:
2561 return snd_pcm_sw_params_user(substream
, arg
);
2562 case SNDRV_PCM_IOCTL_STATUS
:
2563 return snd_pcm_status_user(substream
, arg
);
2564 case SNDRV_PCM_IOCTL_CHANNEL_INFO
:
2565 return snd_pcm_channel_info_user(substream
, arg
);
2566 case SNDRV_PCM_IOCTL_PREPARE
:
2567 return snd_pcm_prepare(substream
, file
);
2568 case SNDRV_PCM_IOCTL_RESET
:
2569 return snd_pcm_reset(substream
);
2570 case SNDRV_PCM_IOCTL_START
:
2571 return snd_pcm_action_lock_irq(&snd_pcm_action_start
, substream
, SNDRV_PCM_STATE_RUNNING
);
2572 case SNDRV_PCM_IOCTL_LINK
:
2573 return snd_pcm_link(substream
, (int)(unsigned long) arg
);
2574 case SNDRV_PCM_IOCTL_UNLINK
:
2575 return snd_pcm_unlink(substream
);
2576 case SNDRV_PCM_IOCTL_RESUME
:
2577 return snd_pcm_resume(substream
);
2578 case SNDRV_PCM_IOCTL_XRUN
:
2579 return snd_pcm_xrun(substream
);
2580 case SNDRV_PCM_IOCTL_HWSYNC
:
2581 return snd_pcm_hwsync(substream
);
2582 case SNDRV_PCM_IOCTL_DELAY
:
2583 return snd_pcm_delay(substream
, arg
);
2584 case SNDRV_PCM_IOCTL_SYNC_PTR
:
2585 return snd_pcm_sync_ptr(substream
, arg
);
2586 #ifdef CONFIG_SND_SUPPORT_OLD_API
2587 case SNDRV_PCM_IOCTL_HW_REFINE_OLD
:
2588 return snd_pcm_hw_refine_old_user(substream
, arg
);
2589 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD
:
2590 return snd_pcm_hw_params_old_user(substream
, arg
);
2592 case SNDRV_PCM_IOCTL_DRAIN
:
2593 return snd_pcm_drain(substream
, file
);
2594 case SNDRV_PCM_IOCTL_DROP
:
2595 return snd_pcm_drop(substream
);
2596 case SNDRV_PCM_IOCTL_PAUSE
:
2599 snd_pcm_stream_lock_irq(substream
);
2600 res
= snd_pcm_pause(substream
, (int)(unsigned long)arg
);
2601 snd_pcm_stream_unlock_irq(substream
);
2605 snd_printd("unknown ioctl = 0x%x\n", cmd
);
2609 static int snd_pcm_playback_ioctl1(struct file
*file
,
2610 struct snd_pcm_substream
*substream
,
2611 unsigned int cmd
, void __user
*arg
)
2613 if (snd_BUG_ON(!substream
))
2615 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
2618 case SNDRV_PCM_IOCTL_WRITEI_FRAMES
:
2620 struct snd_xferi xferi
;
2621 struct snd_xferi __user
*_xferi
= arg
;
2622 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2623 snd_pcm_sframes_t result
;
2624 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2626 if (put_user(0, &_xferi
->result
))
2628 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2630 result
= snd_pcm_lib_write(substream
, xferi
.buf
, xferi
.frames
);
2631 __put_user(result
, &_xferi
->result
);
2632 return result
< 0 ? result
: 0;
2634 case SNDRV_PCM_IOCTL_WRITEN_FRAMES
:
2636 struct snd_xfern xfern
;
2637 struct snd_xfern __user
*_xfern
= arg
;
2638 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2640 snd_pcm_sframes_t result
;
2641 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2643 if (runtime
->channels
> 128)
2645 if (put_user(0, &_xfern
->result
))
2647 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2650 bufs
= memdup_user(xfern
.bufs
,
2651 sizeof(void *) * runtime
->channels
);
2653 return PTR_ERR(bufs
);
2654 result
= snd_pcm_lib_writev(substream
, bufs
, xfern
.frames
);
2656 __put_user(result
, &_xfern
->result
);
2657 return result
< 0 ? result
: 0;
2659 case SNDRV_PCM_IOCTL_REWIND
:
2661 snd_pcm_uframes_t frames
;
2662 snd_pcm_uframes_t __user
*_frames
= arg
;
2663 snd_pcm_sframes_t result
;
2664 if (get_user(frames
, _frames
))
2666 if (put_user(0, _frames
))
2668 result
= snd_pcm_playback_rewind(substream
, frames
);
2669 __put_user(result
, _frames
);
2670 return result
< 0 ? result
: 0;
2672 case SNDRV_PCM_IOCTL_FORWARD
:
2674 snd_pcm_uframes_t frames
;
2675 snd_pcm_uframes_t __user
*_frames
= arg
;
2676 snd_pcm_sframes_t result
;
2677 if (get_user(frames
, _frames
))
2679 if (put_user(0, _frames
))
2681 result
= snd_pcm_playback_forward(substream
, frames
);
2682 __put_user(result
, _frames
);
2683 return result
< 0 ? result
: 0;
2686 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2689 static int snd_pcm_capture_ioctl1(struct file
*file
,
2690 struct snd_pcm_substream
*substream
,
2691 unsigned int cmd
, void __user
*arg
)
2693 if (snd_BUG_ON(!substream
))
2695 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_CAPTURE
))
2698 case SNDRV_PCM_IOCTL_READI_FRAMES
:
2700 struct snd_xferi xferi
;
2701 struct snd_xferi __user
*_xferi
= arg
;
2702 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2703 snd_pcm_sframes_t result
;
2704 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2706 if (put_user(0, &_xferi
->result
))
2708 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2710 result
= snd_pcm_lib_read(substream
, xferi
.buf
, xferi
.frames
);
2711 __put_user(result
, &_xferi
->result
);
2712 return result
< 0 ? result
: 0;
2714 case SNDRV_PCM_IOCTL_READN_FRAMES
:
2716 struct snd_xfern xfern
;
2717 struct snd_xfern __user
*_xfern
= arg
;
2718 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2720 snd_pcm_sframes_t result
;
2721 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2723 if (runtime
->channels
> 128)
2725 if (put_user(0, &_xfern
->result
))
2727 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2730 bufs
= memdup_user(xfern
.bufs
,
2731 sizeof(void *) * runtime
->channels
);
2733 return PTR_ERR(bufs
);
2734 result
= snd_pcm_lib_readv(substream
, bufs
, xfern
.frames
);
2736 __put_user(result
, &_xfern
->result
);
2737 return result
< 0 ? result
: 0;
2739 case SNDRV_PCM_IOCTL_REWIND
:
2741 snd_pcm_uframes_t frames
;
2742 snd_pcm_uframes_t __user
*_frames
= arg
;
2743 snd_pcm_sframes_t result
;
2744 if (get_user(frames
, _frames
))
2746 if (put_user(0, _frames
))
2748 result
= snd_pcm_capture_rewind(substream
, frames
);
2749 __put_user(result
, _frames
);
2750 return result
< 0 ? result
: 0;
2752 case SNDRV_PCM_IOCTL_FORWARD
:
2754 snd_pcm_uframes_t frames
;
2755 snd_pcm_uframes_t __user
*_frames
= arg
;
2756 snd_pcm_sframes_t result
;
2757 if (get_user(frames
, _frames
))
2759 if (put_user(0, _frames
))
2761 result
= snd_pcm_capture_forward(substream
, frames
);
2762 __put_user(result
, _frames
);
2763 return result
< 0 ? result
: 0;
2766 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2769 static long snd_pcm_playback_ioctl(struct file
*file
, unsigned int cmd
,
2772 struct snd_pcm_file
*pcm_file
;
2774 pcm_file
= file
->private_data
;
2776 if (((cmd
>> 8) & 0xff) != 'A')
2779 return snd_pcm_playback_ioctl1(file
, pcm_file
->substream
, cmd
,
2780 (void __user
*)arg
);
2783 static long snd_pcm_capture_ioctl(struct file
*file
, unsigned int cmd
,
2786 struct snd_pcm_file
*pcm_file
;
2788 pcm_file
= file
->private_data
;
2790 if (((cmd
>> 8) & 0xff) != 'A')
2793 return snd_pcm_capture_ioctl1(file
, pcm_file
->substream
, cmd
,
2794 (void __user
*)arg
);
2797 int snd_pcm_kernel_ioctl(struct snd_pcm_substream
*substream
,
2798 unsigned int cmd
, void *arg
)
2803 fs
= snd_enter_user();
2804 switch (substream
->stream
) {
2805 case SNDRV_PCM_STREAM_PLAYBACK
:
2806 result
= snd_pcm_playback_ioctl1(NULL
, substream
, cmd
,
2807 (void __user
*)arg
);
2809 case SNDRV_PCM_STREAM_CAPTURE
:
2810 result
= snd_pcm_capture_ioctl1(NULL
, substream
, cmd
,
2811 (void __user
*)arg
);
2821 EXPORT_SYMBOL(snd_pcm_kernel_ioctl
);
2823 static ssize_t
snd_pcm_read(struct file
*file
, char __user
*buf
, size_t count
,
2826 struct snd_pcm_file
*pcm_file
;
2827 struct snd_pcm_substream
*substream
;
2828 struct snd_pcm_runtime
*runtime
;
2829 snd_pcm_sframes_t result
;
2831 pcm_file
= file
->private_data
;
2832 substream
= pcm_file
->substream
;
2833 if (PCM_RUNTIME_CHECK(substream
))
2835 runtime
= substream
->runtime
;
2836 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2838 if (!frame_aligned(runtime
, count
))
2840 count
= bytes_to_frames(runtime
, count
);
2841 result
= snd_pcm_lib_read(substream
, buf
, count
);
2843 result
= frames_to_bytes(runtime
, result
);
2847 static ssize_t
snd_pcm_write(struct file
*file
, const char __user
*buf
,
2848 size_t count
, loff_t
* offset
)
2850 struct snd_pcm_file
*pcm_file
;
2851 struct snd_pcm_substream
*substream
;
2852 struct snd_pcm_runtime
*runtime
;
2853 snd_pcm_sframes_t result
;
2855 pcm_file
= file
->private_data
;
2856 substream
= pcm_file
->substream
;
2857 if (PCM_RUNTIME_CHECK(substream
))
2859 runtime
= substream
->runtime
;
2860 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2862 if (!frame_aligned(runtime
, count
))
2864 count
= bytes_to_frames(runtime
, count
);
2865 result
= snd_pcm_lib_write(substream
, buf
, count
);
2867 result
= frames_to_bytes(runtime
, result
);
2871 static ssize_t
snd_pcm_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
2872 unsigned long nr_segs
, loff_t pos
)
2875 struct snd_pcm_file
*pcm_file
;
2876 struct snd_pcm_substream
*substream
;
2877 struct snd_pcm_runtime
*runtime
;
2878 snd_pcm_sframes_t result
;
2881 snd_pcm_uframes_t frames
;
2883 pcm_file
= iocb
->ki_filp
->private_data
;
2884 substream
= pcm_file
->substream
;
2885 if (PCM_RUNTIME_CHECK(substream
))
2887 runtime
= substream
->runtime
;
2888 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2890 if (nr_segs
> 1024 || nr_segs
!= runtime
->channels
)
2892 if (!frame_aligned(runtime
, iov
->iov_len
))
2894 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2895 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2898 for (i
= 0; i
< nr_segs
; ++i
)
2899 bufs
[i
] = iov
[i
].iov_base
;
2900 result
= snd_pcm_lib_readv(substream
, bufs
, frames
);
2902 result
= frames_to_bytes(runtime
, result
);
2907 static ssize_t
snd_pcm_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
2908 unsigned long nr_segs
, loff_t pos
)
2910 struct snd_pcm_file
*pcm_file
;
2911 struct snd_pcm_substream
*substream
;
2912 struct snd_pcm_runtime
*runtime
;
2913 snd_pcm_sframes_t result
;
2916 snd_pcm_uframes_t frames
;
2918 pcm_file
= iocb
->ki_filp
->private_data
;
2919 substream
= pcm_file
->substream
;
2920 if (PCM_RUNTIME_CHECK(substream
))
2922 runtime
= substream
->runtime
;
2923 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2925 if (nr_segs
> 128 || nr_segs
!= runtime
->channels
||
2926 !frame_aligned(runtime
, iov
->iov_len
))
2928 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2929 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2932 for (i
= 0; i
< nr_segs
; ++i
)
2933 bufs
[i
] = iov
[i
].iov_base
;
2934 result
= snd_pcm_lib_writev(substream
, bufs
, frames
);
2936 result
= frames_to_bytes(runtime
, result
);
2941 static unsigned int snd_pcm_playback_poll(struct file
*file
, poll_table
* wait
)
2943 struct snd_pcm_file
*pcm_file
;
2944 struct snd_pcm_substream
*substream
;
2945 struct snd_pcm_runtime
*runtime
;
2947 snd_pcm_uframes_t avail
;
2949 pcm_file
= file
->private_data
;
2951 substream
= pcm_file
->substream
;
2952 if (PCM_RUNTIME_CHECK(substream
))
2954 runtime
= substream
->runtime
;
2956 poll_wait(file
, &runtime
->sleep
, wait
);
2958 snd_pcm_stream_lock_irq(substream
);
2959 avail
= snd_pcm_playback_avail(runtime
);
2960 switch (runtime
->status
->state
) {
2961 case SNDRV_PCM_STATE_RUNNING
:
2962 case SNDRV_PCM_STATE_PREPARED
:
2963 case SNDRV_PCM_STATE_PAUSED
:
2964 if (avail
>= runtime
->control
->avail_min
) {
2965 mask
= POLLOUT
| POLLWRNORM
;
2969 case SNDRV_PCM_STATE_DRAINING
:
2973 mask
= POLLOUT
| POLLWRNORM
| POLLERR
;
2976 snd_pcm_stream_unlock_irq(substream
);
2980 static unsigned int snd_pcm_capture_poll(struct file
*file
, poll_table
* wait
)
2982 struct snd_pcm_file
*pcm_file
;
2983 struct snd_pcm_substream
*substream
;
2984 struct snd_pcm_runtime
*runtime
;
2986 snd_pcm_uframes_t avail
;
2988 pcm_file
= file
->private_data
;
2990 substream
= pcm_file
->substream
;
2991 if (PCM_RUNTIME_CHECK(substream
))
2993 runtime
= substream
->runtime
;
2995 poll_wait(file
, &runtime
->sleep
, wait
);
2997 snd_pcm_stream_lock_irq(substream
);
2998 avail
= snd_pcm_capture_avail(runtime
);
2999 switch (runtime
->status
->state
) {
3000 case SNDRV_PCM_STATE_RUNNING
:
3001 case SNDRV_PCM_STATE_PREPARED
:
3002 case SNDRV_PCM_STATE_PAUSED
:
3003 if (avail
>= runtime
->control
->avail_min
) {
3004 mask
= POLLIN
| POLLRDNORM
;
3009 case SNDRV_PCM_STATE_DRAINING
:
3011 mask
= POLLIN
| POLLRDNORM
;
3016 mask
= POLLIN
| POLLRDNORM
| POLLERR
;
3019 snd_pcm_stream_unlock_irq(substream
);
3028 * Only on coherent architectures, we can mmap the status and the control records
3029 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3031 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3033 * mmap status record
3035 static int snd_pcm_mmap_status_fault(struct vm_area_struct
*area
,
3036 struct vm_fault
*vmf
)
3038 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3039 struct snd_pcm_runtime
*runtime
;
3041 if (substream
== NULL
)
3042 return VM_FAULT_SIGBUS
;
3043 runtime
= substream
->runtime
;
3044 vmf
->page
= virt_to_page(runtime
->status
);
3045 get_page(vmf
->page
);
3049 static const struct vm_operations_struct snd_pcm_vm_ops_status
=
3051 .fault
= snd_pcm_mmap_status_fault
,
3054 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3055 struct vm_area_struct
*area
)
3058 if (!(area
->vm_flags
& VM_READ
))
3060 size
= area
->vm_end
- area
->vm_start
;
3061 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)))
3063 area
->vm_ops
= &snd_pcm_vm_ops_status
;
3064 area
->vm_private_data
= substream
;
3065 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3070 * mmap control record
3072 static int snd_pcm_mmap_control_fault(struct vm_area_struct
*area
,
3073 struct vm_fault
*vmf
)
3075 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3076 struct snd_pcm_runtime
*runtime
;
3078 if (substream
== NULL
)
3079 return VM_FAULT_SIGBUS
;
3080 runtime
= substream
->runtime
;
3081 vmf
->page
= virt_to_page(runtime
->control
);
3082 get_page(vmf
->page
);
3086 static const struct vm_operations_struct snd_pcm_vm_ops_control
=
3088 .fault
= snd_pcm_mmap_control_fault
,
3091 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3092 struct vm_area_struct
*area
)
3095 if (!(area
->vm_flags
& VM_READ
))
3097 size
= area
->vm_end
- area
->vm_start
;
3098 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
)))
3100 area
->vm_ops
= &snd_pcm_vm_ops_control
;
3101 area
->vm_private_data
= substream
;
3102 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3105 #else /* ! coherent mmap */
3107 * don't support mmap for status and control records.
3109 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3110 struct vm_area_struct
*area
)
3114 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3115 struct vm_area_struct
*area
)
3119 #endif /* coherent mmap */
3121 static inline struct page
*
3122 snd_pcm_default_page_ops(struct snd_pcm_substream
*substream
, unsigned long ofs
)
3124 void *vaddr
= substream
->runtime
->dma_area
+ ofs
;
3125 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3126 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3127 return virt_to_page(CAC_ADDR(vaddr
));
3129 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3130 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
) {
3131 dma_addr_t addr
= substream
->runtime
->dma_addr
+ ofs
;
3132 addr
-= get_dma_offset(substream
->dma_buffer
.dev
.dev
);
3133 /* assume dma_handle set via pfn_to_phys() in
3134 * mm/dma-noncoherent.c
3136 return pfn_to_page(addr
>> PAGE_SHIFT
);
3139 return virt_to_page(vaddr
);
3143 * fault callback for mmapping a RAM page
3145 static int snd_pcm_mmap_data_fault(struct vm_area_struct
*area
,
3146 struct vm_fault
*vmf
)
3148 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3149 struct snd_pcm_runtime
*runtime
;
3150 unsigned long offset
;
3154 if (substream
== NULL
)
3155 return VM_FAULT_SIGBUS
;
3156 runtime
= substream
->runtime
;
3157 offset
= vmf
->pgoff
<< PAGE_SHIFT
;
3158 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3159 if (offset
> dma_bytes
- PAGE_SIZE
)
3160 return VM_FAULT_SIGBUS
;
3161 if (substream
->ops
->page
)
3162 page
= substream
->ops
->page(substream
, offset
);
3164 page
= snd_pcm_default_page_ops(substream
, offset
);
3166 return VM_FAULT_SIGBUS
;
3172 static const struct vm_operations_struct snd_pcm_vm_ops_data
= {
3173 .open
= snd_pcm_mmap_data_open
,
3174 .close
= snd_pcm_mmap_data_close
,
3177 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault
= {
3178 .open
= snd_pcm_mmap_data_open
,
3179 .close
= snd_pcm_mmap_data_close
,
3180 .fault
= snd_pcm_mmap_data_fault
,
3183 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3184 /* This should be defined / handled globally! */
3186 #define ARCH_HAS_DMA_MMAP_COHERENT
3191 * mmap the DMA buffer on RAM
3193 int snd_pcm_lib_default_mmap(struct snd_pcm_substream
*substream
,
3194 struct vm_area_struct
*area
)
3196 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3197 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3198 if (!substream
->ops
->page
&&
3199 substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3200 return dma_mmap_coherent(substream
->dma_buffer
.dev
.dev
,
3202 substream
->runtime
->dma_area
,
3203 substream
->runtime
->dma_addr
,
3204 area
->vm_end
- area
->vm_start
);
3205 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3206 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
&&
3207 !plat_device_is_coherent(substream
->dma_buffer
.dev
.dev
))
3208 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3209 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3210 /* mmap with fault handler */
3211 area
->vm_ops
= &snd_pcm_vm_ops_data_fault
;
3214 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap
);
3217 * mmap the DMA buffer on I/O memory area
3219 #if SNDRV_PCM_INFO_MMAP_IOMEM
3220 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream
*substream
,
3221 struct vm_area_struct
*area
)
3224 unsigned long offset
;
3226 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3227 area
->vm_flags
|= VM_IO
;
3228 size
= area
->vm_end
- area
->vm_start
;
3229 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3230 if (io_remap_pfn_range(area
, area
->vm_start
,
3231 (substream
->runtime
->dma_addr
+ offset
) >> PAGE_SHIFT
,
3232 size
, area
->vm_page_prot
))
3237 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem
);
3238 #endif /* SNDRV_PCM_INFO_MMAP */
3243 int snd_pcm_mmap_data(struct snd_pcm_substream
*substream
, struct file
*file
,
3244 struct vm_area_struct
*area
)
3246 struct snd_pcm_runtime
*runtime
;
3248 unsigned long offset
;
3252 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
3253 if (!(area
->vm_flags
& (VM_WRITE
|VM_READ
)))
3256 if (!(area
->vm_flags
& VM_READ
))
3259 runtime
= substream
->runtime
;
3260 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3262 if (!(runtime
->info
& SNDRV_PCM_INFO_MMAP
))
3264 if (runtime
->access
== SNDRV_PCM_ACCESS_RW_INTERLEAVED
||
3265 runtime
->access
== SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
)
3267 size
= area
->vm_end
- area
->vm_start
;
3268 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3269 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3270 if ((size_t)size
> dma_bytes
)
3272 if (offset
> dma_bytes
- size
)
3275 area
->vm_ops
= &snd_pcm_vm_ops_data
;
3276 area
->vm_private_data
= substream
;
3277 if (substream
->ops
->mmap
)
3278 err
= substream
->ops
->mmap(substream
, area
);
3280 err
= snd_pcm_lib_default_mmap(substream
, area
);
3282 atomic_inc(&substream
->mmap_count
);
3286 EXPORT_SYMBOL(snd_pcm_mmap_data
);
3288 static int snd_pcm_mmap(struct file
*file
, struct vm_area_struct
*area
)
3290 struct snd_pcm_file
* pcm_file
;
3291 struct snd_pcm_substream
*substream
;
3292 unsigned long offset
;
3294 pcm_file
= file
->private_data
;
3295 substream
= pcm_file
->substream
;
3296 if (PCM_RUNTIME_CHECK(substream
))
3299 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3301 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3302 if (pcm_file
->no_compat_mmap
)
3304 return snd_pcm_mmap_status(substream
, file
, area
);
3305 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3306 if (pcm_file
->no_compat_mmap
)
3308 return snd_pcm_mmap_control(substream
, file
, area
);
3310 return snd_pcm_mmap_data(substream
, file
, area
);
3315 static int snd_pcm_fasync(int fd
, struct file
* file
, int on
)
3317 struct snd_pcm_file
* pcm_file
;
3318 struct snd_pcm_substream
*substream
;
3319 struct snd_pcm_runtime
*runtime
;
3321 pcm_file
= file
->private_data
;
3322 substream
= pcm_file
->substream
;
3323 if (PCM_RUNTIME_CHECK(substream
))
3325 runtime
= substream
->runtime
;
3326 return fasync_helper(fd
, file
, on
, &runtime
->fasync
);
3332 #ifdef CONFIG_COMPAT
3333 #include "pcm_compat.c"
3335 #define snd_pcm_ioctl_compat NULL
3339 * To be removed helpers to keep binary compatibility
3342 #ifdef CONFIG_SND_SUPPORT_OLD_API
3343 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3344 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3346 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params
*params
,
3347 struct snd_pcm_hw_params_old
*oparams
)
3351 memset(params
, 0, sizeof(*params
));
3352 params
->flags
= oparams
->flags
;
3353 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3354 params
->masks
[i
].bits
[0] = oparams
->masks
[i
];
3355 memcpy(params
->intervals
, oparams
->intervals
, sizeof(oparams
->intervals
));
3356 params
->rmask
= __OLD_TO_NEW_MASK(oparams
->rmask
);
3357 params
->cmask
= __OLD_TO_NEW_MASK(oparams
->cmask
);
3358 params
->info
= oparams
->info
;
3359 params
->msbits
= oparams
->msbits
;
3360 params
->rate_num
= oparams
->rate_num
;
3361 params
->rate_den
= oparams
->rate_den
;
3362 params
->fifo_size
= oparams
->fifo_size
;
3365 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old
*oparams
,
3366 struct snd_pcm_hw_params
*params
)
3370 memset(oparams
, 0, sizeof(*oparams
));
3371 oparams
->flags
= params
->flags
;
3372 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3373 oparams
->masks
[i
] = params
->masks
[i
].bits
[0];
3374 memcpy(oparams
->intervals
, params
->intervals
, sizeof(oparams
->intervals
));
3375 oparams
->rmask
= __NEW_TO_OLD_MASK(params
->rmask
);
3376 oparams
->cmask
= __NEW_TO_OLD_MASK(params
->cmask
);
3377 oparams
->info
= params
->info
;
3378 oparams
->msbits
= params
->msbits
;
3379 oparams
->rate_num
= params
->rate_num
;
3380 oparams
->rate_den
= params
->rate_den
;
3381 oparams
->fifo_size
= params
->fifo_size
;
3384 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
3385 struct snd_pcm_hw_params_old __user
* _oparams
)
3387 struct snd_pcm_hw_params
*params
;
3388 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3391 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3395 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3396 if (IS_ERR(oparams
)) {
3397 err
= PTR_ERR(oparams
);
3400 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3401 err
= snd_pcm_hw_refine(substream
, params
);
3402 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3403 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3414 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
3415 struct snd_pcm_hw_params_old __user
* _oparams
)
3417 struct snd_pcm_hw_params
*params
;
3418 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3421 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3425 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3426 if (IS_ERR(oparams
)) {
3427 err
= PTR_ERR(oparams
);
3430 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3431 err
= snd_pcm_hw_params(substream
, params
);
3432 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3433 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3443 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3446 static unsigned long snd_pcm_get_unmapped_area(struct file
*file
,
3449 unsigned long pgoff
,
3450 unsigned long flags
)
3452 struct snd_pcm_file
*pcm_file
= file
->private_data
;
3453 struct snd_pcm_substream
*substream
= pcm_file
->substream
;
3454 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
3455 unsigned long offset
= pgoff
<< PAGE_SHIFT
;
3458 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3459 return (unsigned long)runtime
->status
;
3460 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3461 return (unsigned long)runtime
->control
;
3463 return (unsigned long)runtime
->dma_area
+ offset
;
3467 # define snd_pcm_get_unmapped_area NULL
3474 const struct file_operations snd_pcm_f_ops
[2] = {
3476 .owner
= THIS_MODULE
,
3477 .write
= snd_pcm_write
,
3478 .aio_write
= snd_pcm_aio_write
,
3479 .open
= snd_pcm_playback_open
,
3480 .release
= snd_pcm_release
,
3481 .llseek
= no_llseek
,
3482 .poll
= snd_pcm_playback_poll
,
3483 .unlocked_ioctl
= snd_pcm_playback_ioctl
,
3484 .compat_ioctl
= snd_pcm_ioctl_compat
,
3485 .mmap
= snd_pcm_mmap
,
3486 .fasync
= snd_pcm_fasync
,
3487 .get_unmapped_area
= snd_pcm_get_unmapped_area
,
3490 .owner
= THIS_MODULE
,
3491 .read
= snd_pcm_read
,
3492 .aio_read
= snd_pcm_aio_read
,
3493 .open
= snd_pcm_capture_open
,
3494 .release
= snd_pcm_release
,
3495 .llseek
= no_llseek
,
3496 .poll
= snd_pcm_capture_poll
,
3497 .unlocked_ioctl
= snd_pcm_capture_ioctl
,
3498 .compat_ioctl
= snd_pcm_ioctl_compat
,
3499 .mmap
= snd_pcm_mmap
,
3500 .fasync
= snd_pcm_fasync
,
3501 .get_unmapped_area
= snd_pcm_get_unmapped_area
,