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
);
1522 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1525 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1526 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1534 snd_pcm_stream_unlock_irq(substream
);
1535 up_read(&snd_pcm_link_rwsem
);
1536 snd_power_unlock(card
);
1544 * Immediately put all linked substreams into SETUP state.
1546 static int snd_pcm_drop(struct snd_pcm_substream
*substream
)
1548 struct snd_pcm_runtime
*runtime
;
1551 if (PCM_RUNTIME_CHECK(substream
))
1553 runtime
= substream
->runtime
;
1555 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1556 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
||
1557 runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1560 snd_pcm_stream_lock_irq(substream
);
1562 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1563 snd_pcm_pause(substream
, 0);
1565 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1566 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1567 snd_pcm_stream_unlock_irq(substream
);
1573 /* WARNING: Don't forget to fput back the file */
1574 static struct file
*snd_pcm_file_fd(int fd
, int *fput_needed
)
1577 struct inode
*inode
;
1580 file
= fget_light(fd
, fput_needed
);
1583 inode
= file
->f_path
.dentry
->d_inode
;
1584 if (!S_ISCHR(inode
->i_mode
) ||
1585 imajor(inode
) != snd_major
) {
1586 fput_light(file
, *fput_needed
);
1589 minor
= iminor(inode
);
1590 if (!snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_PLAYBACK
) &&
1591 !snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_CAPTURE
)) {
1592 fput_light(file
, *fput_needed
);
1601 static int snd_pcm_link(struct snd_pcm_substream
*substream
, int fd
)
1605 struct snd_pcm_file
*pcm_file
;
1606 struct snd_pcm_substream
*substream1
;
1607 struct snd_pcm_group
*group
;
1610 file
= snd_pcm_file_fd(fd
, &fput_needed
);
1613 pcm_file
= file
->private_data
;
1614 substream1
= pcm_file
->substream
;
1615 group
= kmalloc(sizeof(*group
), GFP_KERNEL
);
1620 down_write(&snd_pcm_link_rwsem
);
1621 write_lock_irq(&snd_pcm_link_rwlock
);
1622 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1623 substream
->runtime
->status
->state
!= substream1
->runtime
->status
->state
) {
1627 if (snd_pcm_stream_linked(substream1
)) {
1631 if (!snd_pcm_stream_linked(substream
)) {
1632 substream
->group
= group
;
1633 spin_lock_init(&substream
->group
->lock
);
1634 INIT_LIST_HEAD(&substream
->group
->substreams
);
1635 list_add_tail(&substream
->link_list
, &substream
->group
->substreams
);
1636 substream
->group
->count
= 1;
1638 list_add_tail(&substream1
->link_list
, &substream
->group
->substreams
);
1639 substream
->group
->count
++;
1640 substream1
->group
= substream
->group
;
1642 write_unlock_irq(&snd_pcm_link_rwlock
);
1643 up_write(&snd_pcm_link_rwsem
);
1645 snd_card_unref(substream1
->pcm
->card
);
1646 fput_light(file
, fput_needed
);
1652 static void relink_to_local(struct snd_pcm_substream
*substream
)
1654 substream
->group
= &substream
->self_group
;
1655 INIT_LIST_HEAD(&substream
->self_group
.substreams
);
1656 list_add_tail(&substream
->link_list
, &substream
->self_group
.substreams
);
1659 static int snd_pcm_unlink(struct snd_pcm_substream
*substream
)
1661 struct snd_pcm_substream
*s
;
1664 down_write(&snd_pcm_link_rwsem
);
1665 write_lock_irq(&snd_pcm_link_rwlock
);
1666 if (!snd_pcm_stream_linked(substream
)) {
1670 list_del(&substream
->link_list
);
1671 substream
->group
->count
--;
1672 if (substream
->group
->count
== 1) { /* detach the last stream, too */
1673 snd_pcm_group_for_each_entry(s
, substream
) {
1677 kfree(substream
->group
);
1679 relink_to_local(substream
);
1681 write_unlock_irq(&snd_pcm_link_rwlock
);
1682 up_write(&snd_pcm_link_rwsem
);
1689 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params
*params
,
1690 struct snd_pcm_hw_rule
*rule
)
1692 struct snd_interval t
;
1693 snd_interval_mul(hw_param_interval_c(params
, rule
->deps
[0]),
1694 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1695 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1698 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params
*params
,
1699 struct snd_pcm_hw_rule
*rule
)
1701 struct snd_interval t
;
1702 snd_interval_div(hw_param_interval_c(params
, rule
->deps
[0]),
1703 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1704 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1707 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params
*params
,
1708 struct snd_pcm_hw_rule
*rule
)
1710 struct snd_interval t
;
1711 snd_interval_muldivk(hw_param_interval_c(params
, rule
->deps
[0]),
1712 hw_param_interval_c(params
, rule
->deps
[1]),
1713 (unsigned long) rule
->private, &t
);
1714 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1717 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params
*params
,
1718 struct snd_pcm_hw_rule
*rule
)
1720 struct snd_interval t
;
1721 snd_interval_mulkdiv(hw_param_interval_c(params
, rule
->deps
[0]),
1722 (unsigned long) rule
->private,
1723 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1724 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1727 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params
*params
,
1728 struct snd_pcm_hw_rule
*rule
)
1731 struct snd_interval
*i
= hw_param_interval(params
, rule
->deps
[0]);
1733 struct snd_mask
*mask
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1735 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1737 if (! snd_mask_test(mask
, k
))
1739 bits
= snd_pcm_format_physical_width(k
);
1741 continue; /* ignore invalid formats */
1742 if ((unsigned)bits
< i
->min
|| (unsigned)bits
> i
->max
)
1743 snd_mask_reset(&m
, k
);
1745 return snd_mask_refine(mask
, &m
);
1748 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params
*params
,
1749 struct snd_pcm_hw_rule
*rule
)
1751 struct snd_interval t
;
1757 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1759 if (! snd_mask_test(hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
), k
))
1761 bits
= snd_pcm_format_physical_width(k
);
1763 continue; /* ignore invalid formats */
1764 if (t
.min
> (unsigned)bits
)
1766 if (t
.max
< (unsigned)bits
)
1770 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1773 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1774 #error "Change this table"
1777 static unsigned int rates
[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1778 48000, 64000, 88200, 96000, 176400, 192000 };
1780 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates
= {
1781 .count
= ARRAY_SIZE(rates
),
1785 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params
*params
,
1786 struct snd_pcm_hw_rule
*rule
)
1788 struct snd_pcm_hardware
*hw
= rule
->private;
1789 return snd_interval_list(hw_param_interval(params
, rule
->var
),
1790 snd_pcm_known_rates
.count
,
1791 snd_pcm_known_rates
.list
, hw
->rates
);
1794 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params
*params
,
1795 struct snd_pcm_hw_rule
*rule
)
1797 struct snd_interval t
;
1798 struct snd_pcm_substream
*substream
= rule
->private;
1800 t
.max
= substream
->buffer_bytes_max
;
1804 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1807 int snd_pcm_hw_constraints_init(struct snd_pcm_substream
*substream
)
1809 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1810 struct snd_pcm_hw_constraints
*constrs
= &runtime
->hw_constraints
;
1813 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
1814 snd_mask_any(constrs_mask(constrs
, k
));
1817 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
1818 snd_interval_any(constrs_interval(constrs
, k
));
1821 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_CHANNELS
));
1822 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
));
1823 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
));
1824 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
));
1825 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_FRAME_BITS
));
1827 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1828 snd_pcm_hw_rule_format
, NULL
,
1829 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1832 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1833 snd_pcm_hw_rule_sample_bits
, NULL
,
1834 SNDRV_PCM_HW_PARAM_FORMAT
,
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_div
, NULL
,
1840 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1843 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1844 snd_pcm_hw_rule_mul
, NULL
,
1845 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1848 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1849 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1850 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1853 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1854 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1855 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, -1);
1858 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
1859 snd_pcm_hw_rule_div
, NULL
,
1860 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1863 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1864 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1865 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
, -1);
1868 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1869 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1870 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_BUFFER_TIME
, -1);
1873 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIODS
,
1874 snd_pcm_hw_rule_div
, NULL
,
1875 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1878 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1879 snd_pcm_hw_rule_div
, NULL
,
1880 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1883 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1884 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1885 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1888 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
1889 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1890 SNDRV_PCM_HW_PARAM_PERIOD_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1893 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1894 snd_pcm_hw_rule_mul
, NULL
,
1895 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
1898 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1899 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1900 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1903 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
1904 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
1905 SNDRV_PCM_HW_PARAM_BUFFER_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1908 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1909 snd_pcm_hw_rule_muldivk
, (void*) 8,
1910 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1913 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1914 snd_pcm_hw_rule_muldivk
, (void*) 8,
1915 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
1918 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
1919 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1920 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1923 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME
,
1924 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1925 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
1931 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream
*substream
)
1933 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1934 struct snd_pcm_hardware
*hw
= &runtime
->hw
;
1936 unsigned int mask
= 0;
1938 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1939 mask
|= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED
;
1940 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1941 mask
|= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
;
1942 if (hw
->info
& SNDRV_PCM_INFO_MMAP
) {
1943 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
1944 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED
;
1945 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
1946 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED
;
1947 if (hw
->info
& SNDRV_PCM_INFO_COMPLEX
)
1948 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX
;
1950 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_ACCESS
, mask
);
1954 err
= snd_pcm_hw_constraint_mask64(runtime
, SNDRV_PCM_HW_PARAM_FORMAT
, hw
->formats
);
1958 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_SUBFORMAT
, 1 << SNDRV_PCM_SUBFORMAT_STD
);
1962 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_CHANNELS
,
1963 hw
->channels_min
, hw
->channels_max
);
1967 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_RATE
,
1968 hw
->rate_min
, hw
->rate_max
);
1972 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
1973 hw
->period_bytes_min
, hw
->period_bytes_max
);
1977 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIODS
,
1978 hw
->periods_min
, hw
->periods_max
);
1982 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1983 hw
->period_bytes_min
, hw
->buffer_bytes_max
);
1987 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
1988 snd_pcm_hw_rule_buffer_bytes_max
, substream
,
1989 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, -1);
1994 if (runtime
->dma_bytes
) {
1995 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, 0, runtime
->dma_bytes
);
2000 if (!(hw
->rates
& (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))) {
2001 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
2002 snd_pcm_hw_rule_rate
, hw
,
2003 SNDRV_PCM_HW_PARAM_RATE
, -1);
2008 /* FIXME: this belong to lowlevel */
2009 snd_pcm_hw_constraint_integer(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
);
2014 static void pcm_release_private(struct snd_pcm_substream
*substream
)
2016 snd_pcm_unlink(substream
);
2019 void snd_pcm_release_substream(struct snd_pcm_substream
*substream
)
2021 substream
->ref_count
--;
2022 if (substream
->ref_count
> 0)
2025 snd_pcm_drop(substream
);
2026 if (substream
->hw_opened
) {
2027 if (substream
->ops
->hw_free
!= NULL
)
2028 substream
->ops
->hw_free(substream
);
2029 substream
->ops
->close(substream
);
2030 substream
->hw_opened
= 0;
2032 if (pm_qos_request_active(&substream
->latency_pm_qos_req
))
2033 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
2034 if (substream
->pcm_release
) {
2035 substream
->pcm_release(substream
);
2036 substream
->pcm_release
= NULL
;
2038 snd_pcm_detach_substream(substream
);
2041 EXPORT_SYMBOL(snd_pcm_release_substream
);
2043 int snd_pcm_open_substream(struct snd_pcm
*pcm
, int stream
,
2045 struct snd_pcm_substream
**rsubstream
)
2047 struct snd_pcm_substream
*substream
;
2050 err
= snd_pcm_attach_substream(pcm
, stream
, file
, &substream
);
2053 if (substream
->ref_count
> 1) {
2054 *rsubstream
= substream
;
2058 err
= snd_pcm_hw_constraints_init(substream
);
2060 snd_printd("snd_pcm_hw_constraints_init failed\n");
2064 if ((err
= substream
->ops
->open(substream
)) < 0)
2067 substream
->hw_opened
= 1;
2069 err
= snd_pcm_hw_constraints_complete(substream
);
2071 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2075 *rsubstream
= substream
;
2079 snd_pcm_release_substream(substream
);
2083 EXPORT_SYMBOL(snd_pcm_open_substream
);
2085 static int snd_pcm_open_file(struct file
*file
,
2086 struct snd_pcm
*pcm
,
2089 struct snd_pcm_file
*pcm_file
;
2090 struct snd_pcm_substream
*substream
;
2093 err
= snd_pcm_open_substream(pcm
, stream
, file
, &substream
);
2097 pcm_file
= kzalloc(sizeof(*pcm_file
), GFP_KERNEL
);
2098 if (pcm_file
== NULL
) {
2099 snd_pcm_release_substream(substream
);
2102 pcm_file
->substream
= substream
;
2103 if (substream
->ref_count
== 1) {
2104 substream
->file
= pcm_file
;
2105 substream
->pcm_release
= pcm_release_private
;
2107 file
->private_data
= pcm_file
;
2112 static int snd_pcm_playback_open(struct inode
*inode
, struct file
*file
)
2114 struct snd_pcm
*pcm
;
2115 int err
= nonseekable_open(inode
, file
);
2118 pcm
= snd_lookup_minor_data(iminor(inode
),
2119 SNDRV_DEVICE_TYPE_PCM_PLAYBACK
);
2120 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_PLAYBACK
);
2121 snd_card_unref(pcm
->card
);
2125 static int snd_pcm_capture_open(struct inode
*inode
, struct file
*file
)
2127 struct snd_pcm
*pcm
;
2128 int err
= nonseekable_open(inode
, file
);
2131 pcm
= snd_lookup_minor_data(iminor(inode
),
2132 SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
2133 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_CAPTURE
);
2134 snd_card_unref(pcm
->card
);
2138 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
)
2147 err
= snd_card_file_add(pcm
->card
, file
);
2150 if (!try_module_get(pcm
->card
->module
)) {
2154 init_waitqueue_entry(&wait
, current
);
2155 add_wait_queue(&pcm
->open_wait
, &wait
);
2156 mutex_lock(&pcm
->open_mutex
);
2158 err
= snd_pcm_open_file(file
, pcm
, stream
);
2161 if (err
== -EAGAIN
) {
2162 if (file
->f_flags
& O_NONBLOCK
) {
2168 set_current_state(TASK_INTERRUPTIBLE
);
2169 mutex_unlock(&pcm
->open_mutex
);
2171 mutex_lock(&pcm
->open_mutex
);
2172 if (signal_pending(current
)) {
2177 remove_wait_queue(&pcm
->open_wait
, &wait
);
2178 mutex_unlock(&pcm
->open_mutex
);
2184 module_put(pcm
->card
->module
);
2186 snd_card_file_remove(pcm
->card
, file
);
2191 static int snd_pcm_release(struct inode
*inode
, struct file
*file
)
2193 struct snd_pcm
*pcm
;
2194 struct snd_pcm_substream
*substream
;
2195 struct snd_pcm_file
*pcm_file
;
2197 pcm_file
= file
->private_data
;
2198 substream
= pcm_file
->substream
;
2199 if (snd_BUG_ON(!substream
))
2201 pcm
= substream
->pcm
;
2202 mutex_lock(&pcm
->open_mutex
);
2203 snd_pcm_release_substream(substream
);
2205 mutex_unlock(&pcm
->open_mutex
);
2206 wake_up(&pcm
->open_wait
);
2207 module_put(pcm
->card
->module
);
2208 snd_card_file_remove(pcm
->card
, file
);
2212 static snd_pcm_sframes_t
snd_pcm_playback_rewind(struct snd_pcm_substream
*substream
,
2213 snd_pcm_uframes_t frames
)
2215 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2216 snd_pcm_sframes_t appl_ptr
;
2217 snd_pcm_sframes_t ret
;
2218 snd_pcm_sframes_t hw_avail
;
2223 snd_pcm_stream_lock_irq(substream
);
2224 switch (runtime
->status
->state
) {
2225 case SNDRV_PCM_STATE_PREPARED
:
2227 case SNDRV_PCM_STATE_DRAINING
:
2228 case SNDRV_PCM_STATE_RUNNING
:
2229 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2232 case SNDRV_PCM_STATE_XRUN
:
2235 case SNDRV_PCM_STATE_SUSPENDED
:
2243 hw_avail
= snd_pcm_playback_hw_avail(runtime
);
2244 if (hw_avail
<= 0) {
2248 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2250 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2252 appl_ptr
+= runtime
->boundary
;
2253 runtime
->control
->appl_ptr
= appl_ptr
;
2256 snd_pcm_stream_unlock_irq(substream
);
2260 static snd_pcm_sframes_t
snd_pcm_capture_rewind(struct snd_pcm_substream
*substream
,
2261 snd_pcm_uframes_t frames
)
2263 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2264 snd_pcm_sframes_t appl_ptr
;
2265 snd_pcm_sframes_t ret
;
2266 snd_pcm_sframes_t hw_avail
;
2271 snd_pcm_stream_lock_irq(substream
);
2272 switch (runtime
->status
->state
) {
2273 case SNDRV_PCM_STATE_PREPARED
:
2274 case SNDRV_PCM_STATE_DRAINING
:
2276 case SNDRV_PCM_STATE_RUNNING
:
2277 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2280 case SNDRV_PCM_STATE_XRUN
:
2283 case SNDRV_PCM_STATE_SUSPENDED
:
2291 hw_avail
= snd_pcm_capture_hw_avail(runtime
);
2292 if (hw_avail
<= 0) {
2296 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2298 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2300 appl_ptr
+= runtime
->boundary
;
2301 runtime
->control
->appl_ptr
= appl_ptr
;
2304 snd_pcm_stream_unlock_irq(substream
);
2308 static snd_pcm_sframes_t
snd_pcm_playback_forward(struct snd_pcm_substream
*substream
,
2309 snd_pcm_uframes_t frames
)
2311 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2312 snd_pcm_sframes_t appl_ptr
;
2313 snd_pcm_sframes_t ret
;
2314 snd_pcm_sframes_t avail
;
2319 snd_pcm_stream_lock_irq(substream
);
2320 switch (runtime
->status
->state
) {
2321 case SNDRV_PCM_STATE_PREPARED
:
2322 case SNDRV_PCM_STATE_PAUSED
:
2324 case SNDRV_PCM_STATE_DRAINING
:
2325 case SNDRV_PCM_STATE_RUNNING
:
2326 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2329 case SNDRV_PCM_STATE_XRUN
:
2332 case SNDRV_PCM_STATE_SUSPENDED
:
2340 avail
= snd_pcm_playback_avail(runtime
);
2345 if (frames
> (snd_pcm_uframes_t
)avail
)
2347 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2348 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2349 appl_ptr
-= runtime
->boundary
;
2350 runtime
->control
->appl_ptr
= appl_ptr
;
2353 snd_pcm_stream_unlock_irq(substream
);
2357 static snd_pcm_sframes_t
snd_pcm_capture_forward(struct snd_pcm_substream
*substream
,
2358 snd_pcm_uframes_t frames
)
2360 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2361 snd_pcm_sframes_t appl_ptr
;
2362 snd_pcm_sframes_t ret
;
2363 snd_pcm_sframes_t avail
;
2368 snd_pcm_stream_lock_irq(substream
);
2369 switch (runtime
->status
->state
) {
2370 case SNDRV_PCM_STATE_PREPARED
:
2371 case SNDRV_PCM_STATE_DRAINING
:
2372 case SNDRV_PCM_STATE_PAUSED
:
2374 case SNDRV_PCM_STATE_RUNNING
:
2375 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2378 case SNDRV_PCM_STATE_XRUN
:
2381 case SNDRV_PCM_STATE_SUSPENDED
:
2389 avail
= snd_pcm_capture_avail(runtime
);
2394 if (frames
> (snd_pcm_uframes_t
)avail
)
2396 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2397 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2398 appl_ptr
-= runtime
->boundary
;
2399 runtime
->control
->appl_ptr
= appl_ptr
;
2402 snd_pcm_stream_unlock_irq(substream
);
2406 static int snd_pcm_hwsync(struct snd_pcm_substream
*substream
)
2408 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2411 snd_pcm_stream_lock_irq(substream
);
2412 switch (runtime
->status
->state
) {
2413 case SNDRV_PCM_STATE_DRAINING
:
2414 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2416 case SNDRV_PCM_STATE_RUNNING
:
2417 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2420 case SNDRV_PCM_STATE_PREPARED
:
2421 case SNDRV_PCM_STATE_SUSPENDED
:
2424 case SNDRV_PCM_STATE_XRUN
:
2432 snd_pcm_stream_unlock_irq(substream
);
2436 static int snd_pcm_delay(struct snd_pcm_substream
*substream
,
2437 snd_pcm_sframes_t __user
*res
)
2439 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2441 snd_pcm_sframes_t n
= 0;
2443 snd_pcm_stream_lock_irq(substream
);
2444 switch (runtime
->status
->state
) {
2445 case SNDRV_PCM_STATE_DRAINING
:
2446 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2448 case SNDRV_PCM_STATE_RUNNING
:
2449 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2452 case SNDRV_PCM_STATE_PREPARED
:
2453 case SNDRV_PCM_STATE_SUSPENDED
:
2455 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2456 n
= snd_pcm_playback_hw_avail(runtime
);
2458 n
= snd_pcm_capture_avail(runtime
);
2459 n
+= runtime
->delay
;
2461 case SNDRV_PCM_STATE_XRUN
:
2469 snd_pcm_stream_unlock_irq(substream
);
2471 if (put_user(n
, res
))
2476 static int snd_pcm_sync_ptr(struct snd_pcm_substream
*substream
,
2477 struct snd_pcm_sync_ptr __user
*_sync_ptr
)
2479 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2480 struct snd_pcm_sync_ptr sync_ptr
;
2481 volatile struct snd_pcm_mmap_status
*status
;
2482 volatile struct snd_pcm_mmap_control
*control
;
2485 memset(&sync_ptr
, 0, sizeof(sync_ptr
));
2486 if (get_user(sync_ptr
.flags
, (unsigned __user
*)&(_sync_ptr
->flags
)))
2488 if (copy_from_user(&sync_ptr
.c
.control
, &(_sync_ptr
->c
.control
), sizeof(struct snd_pcm_mmap_control
)))
2490 status
= runtime
->status
;
2491 control
= runtime
->control
;
2492 if (sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_HWSYNC
) {
2493 err
= snd_pcm_hwsync(substream
);
2497 snd_pcm_stream_lock_irq(substream
);
2498 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_APPL
))
2499 control
->appl_ptr
= sync_ptr
.c
.control
.appl_ptr
;
2501 sync_ptr
.c
.control
.appl_ptr
= control
->appl_ptr
;
2502 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_AVAIL_MIN
))
2503 control
->avail_min
= sync_ptr
.c
.control
.avail_min
;
2505 sync_ptr
.c
.control
.avail_min
= control
->avail_min
;
2506 sync_ptr
.s
.status
.state
= status
->state
;
2507 sync_ptr
.s
.status
.hw_ptr
= status
->hw_ptr
;
2508 sync_ptr
.s
.status
.tstamp
= status
->tstamp
;
2509 sync_ptr
.s
.status
.suspended_state
= status
->suspended_state
;
2510 snd_pcm_stream_unlock_irq(substream
);
2511 if (copy_to_user(_sync_ptr
, &sync_ptr
, sizeof(sync_ptr
)))
2516 static int snd_pcm_tstamp(struct snd_pcm_substream
*substream
, int __user
*_arg
)
2518 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2521 if (get_user(arg
, _arg
))
2523 if (arg
< 0 || arg
> SNDRV_PCM_TSTAMP_TYPE_LAST
)
2525 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY
;
2526 if (arg
== SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
)
2527 runtime
->tstamp_type
= SNDRV_PCM_TSTAMP_TYPE_MONOTONIC
;
2531 static int snd_pcm_common_ioctl1(struct file
*file
,
2532 struct snd_pcm_substream
*substream
,
2533 unsigned int cmd
, void __user
*arg
)
2536 case SNDRV_PCM_IOCTL_PVERSION
:
2537 return put_user(SNDRV_PCM_VERSION
, (int __user
*)arg
) ? -EFAULT
: 0;
2538 case SNDRV_PCM_IOCTL_INFO
:
2539 return snd_pcm_info_user(substream
, arg
);
2540 case SNDRV_PCM_IOCTL_TSTAMP
: /* just for compatibility */
2542 case SNDRV_PCM_IOCTL_TTSTAMP
:
2543 return snd_pcm_tstamp(substream
, arg
);
2544 case SNDRV_PCM_IOCTL_HW_REFINE
:
2545 return snd_pcm_hw_refine_user(substream
, arg
);
2546 case SNDRV_PCM_IOCTL_HW_PARAMS
:
2547 return snd_pcm_hw_params_user(substream
, arg
);
2548 case SNDRV_PCM_IOCTL_HW_FREE
:
2549 return snd_pcm_hw_free(substream
);
2550 case SNDRV_PCM_IOCTL_SW_PARAMS
:
2551 return snd_pcm_sw_params_user(substream
, arg
);
2552 case SNDRV_PCM_IOCTL_STATUS
:
2553 return snd_pcm_status_user(substream
, arg
);
2554 case SNDRV_PCM_IOCTL_CHANNEL_INFO
:
2555 return snd_pcm_channel_info_user(substream
, arg
);
2556 case SNDRV_PCM_IOCTL_PREPARE
:
2557 return snd_pcm_prepare(substream
, file
);
2558 case SNDRV_PCM_IOCTL_RESET
:
2559 return snd_pcm_reset(substream
);
2560 case SNDRV_PCM_IOCTL_START
:
2561 return snd_pcm_action_lock_irq(&snd_pcm_action_start
, substream
, SNDRV_PCM_STATE_RUNNING
);
2562 case SNDRV_PCM_IOCTL_LINK
:
2563 return snd_pcm_link(substream
, (int)(unsigned long) arg
);
2564 case SNDRV_PCM_IOCTL_UNLINK
:
2565 return snd_pcm_unlink(substream
);
2566 case SNDRV_PCM_IOCTL_RESUME
:
2567 return snd_pcm_resume(substream
);
2568 case SNDRV_PCM_IOCTL_XRUN
:
2569 return snd_pcm_xrun(substream
);
2570 case SNDRV_PCM_IOCTL_HWSYNC
:
2571 return snd_pcm_hwsync(substream
);
2572 case SNDRV_PCM_IOCTL_DELAY
:
2573 return snd_pcm_delay(substream
, arg
);
2574 case SNDRV_PCM_IOCTL_SYNC_PTR
:
2575 return snd_pcm_sync_ptr(substream
, arg
);
2576 #ifdef CONFIG_SND_SUPPORT_OLD_API
2577 case SNDRV_PCM_IOCTL_HW_REFINE_OLD
:
2578 return snd_pcm_hw_refine_old_user(substream
, arg
);
2579 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD
:
2580 return snd_pcm_hw_params_old_user(substream
, arg
);
2582 case SNDRV_PCM_IOCTL_DRAIN
:
2583 return snd_pcm_drain(substream
, file
);
2584 case SNDRV_PCM_IOCTL_DROP
:
2585 return snd_pcm_drop(substream
);
2586 case SNDRV_PCM_IOCTL_PAUSE
:
2589 snd_pcm_stream_lock_irq(substream
);
2590 res
= snd_pcm_pause(substream
, (int)(unsigned long)arg
);
2591 snd_pcm_stream_unlock_irq(substream
);
2595 snd_printd("unknown ioctl = 0x%x\n", cmd
);
2599 static int snd_pcm_playback_ioctl1(struct file
*file
,
2600 struct snd_pcm_substream
*substream
,
2601 unsigned int cmd
, void __user
*arg
)
2603 if (snd_BUG_ON(!substream
))
2605 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
2608 case SNDRV_PCM_IOCTL_WRITEI_FRAMES
:
2610 struct snd_xferi xferi
;
2611 struct snd_xferi __user
*_xferi
= arg
;
2612 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2613 snd_pcm_sframes_t result
;
2614 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2616 if (put_user(0, &_xferi
->result
))
2618 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2620 result
= snd_pcm_lib_write(substream
, xferi
.buf
, xferi
.frames
);
2621 __put_user(result
, &_xferi
->result
);
2622 return result
< 0 ? result
: 0;
2624 case SNDRV_PCM_IOCTL_WRITEN_FRAMES
:
2626 struct snd_xfern xfern
;
2627 struct snd_xfern __user
*_xfern
= arg
;
2628 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2630 snd_pcm_sframes_t result
;
2631 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2633 if (runtime
->channels
> 128)
2635 if (put_user(0, &_xfern
->result
))
2637 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2640 bufs
= memdup_user(xfern
.bufs
,
2641 sizeof(void *) * runtime
->channels
);
2643 return PTR_ERR(bufs
);
2644 result
= snd_pcm_lib_writev(substream
, bufs
, xfern
.frames
);
2646 __put_user(result
, &_xfern
->result
);
2647 return result
< 0 ? result
: 0;
2649 case SNDRV_PCM_IOCTL_REWIND
:
2651 snd_pcm_uframes_t frames
;
2652 snd_pcm_uframes_t __user
*_frames
= arg
;
2653 snd_pcm_sframes_t result
;
2654 if (get_user(frames
, _frames
))
2656 if (put_user(0, _frames
))
2658 result
= snd_pcm_playback_rewind(substream
, frames
);
2659 __put_user(result
, _frames
);
2660 return result
< 0 ? result
: 0;
2662 case SNDRV_PCM_IOCTL_FORWARD
:
2664 snd_pcm_uframes_t frames
;
2665 snd_pcm_uframes_t __user
*_frames
= arg
;
2666 snd_pcm_sframes_t result
;
2667 if (get_user(frames
, _frames
))
2669 if (put_user(0, _frames
))
2671 result
= snd_pcm_playback_forward(substream
, frames
);
2672 __put_user(result
, _frames
);
2673 return result
< 0 ? result
: 0;
2676 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2679 static int snd_pcm_capture_ioctl1(struct file
*file
,
2680 struct snd_pcm_substream
*substream
,
2681 unsigned int cmd
, void __user
*arg
)
2683 if (snd_BUG_ON(!substream
))
2685 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_CAPTURE
))
2688 case SNDRV_PCM_IOCTL_READI_FRAMES
:
2690 struct snd_xferi xferi
;
2691 struct snd_xferi __user
*_xferi
= arg
;
2692 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2693 snd_pcm_sframes_t result
;
2694 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2696 if (put_user(0, &_xferi
->result
))
2698 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2700 result
= snd_pcm_lib_read(substream
, xferi
.buf
, xferi
.frames
);
2701 __put_user(result
, &_xferi
->result
);
2702 return result
< 0 ? result
: 0;
2704 case SNDRV_PCM_IOCTL_READN_FRAMES
:
2706 struct snd_xfern xfern
;
2707 struct snd_xfern __user
*_xfern
= arg
;
2708 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2710 snd_pcm_sframes_t result
;
2711 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2713 if (runtime
->channels
> 128)
2715 if (put_user(0, &_xfern
->result
))
2717 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2720 bufs
= memdup_user(xfern
.bufs
,
2721 sizeof(void *) * runtime
->channels
);
2723 return PTR_ERR(bufs
);
2724 result
= snd_pcm_lib_readv(substream
, bufs
, xfern
.frames
);
2726 __put_user(result
, &_xfern
->result
);
2727 return result
< 0 ? result
: 0;
2729 case SNDRV_PCM_IOCTL_REWIND
:
2731 snd_pcm_uframes_t frames
;
2732 snd_pcm_uframes_t __user
*_frames
= arg
;
2733 snd_pcm_sframes_t result
;
2734 if (get_user(frames
, _frames
))
2736 if (put_user(0, _frames
))
2738 result
= snd_pcm_capture_rewind(substream
, frames
);
2739 __put_user(result
, _frames
);
2740 return result
< 0 ? result
: 0;
2742 case SNDRV_PCM_IOCTL_FORWARD
:
2744 snd_pcm_uframes_t frames
;
2745 snd_pcm_uframes_t __user
*_frames
= arg
;
2746 snd_pcm_sframes_t result
;
2747 if (get_user(frames
, _frames
))
2749 if (put_user(0, _frames
))
2751 result
= snd_pcm_capture_forward(substream
, frames
);
2752 __put_user(result
, _frames
);
2753 return result
< 0 ? result
: 0;
2756 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2759 static long snd_pcm_playback_ioctl(struct file
*file
, unsigned int cmd
,
2762 struct snd_pcm_file
*pcm_file
;
2764 pcm_file
= file
->private_data
;
2766 if (((cmd
>> 8) & 0xff) != 'A')
2769 return snd_pcm_playback_ioctl1(file
, pcm_file
->substream
, cmd
,
2770 (void __user
*)arg
);
2773 static long snd_pcm_capture_ioctl(struct file
*file
, unsigned int cmd
,
2776 struct snd_pcm_file
*pcm_file
;
2778 pcm_file
= file
->private_data
;
2780 if (((cmd
>> 8) & 0xff) != 'A')
2783 return snd_pcm_capture_ioctl1(file
, pcm_file
->substream
, cmd
,
2784 (void __user
*)arg
);
2787 int snd_pcm_kernel_ioctl(struct snd_pcm_substream
*substream
,
2788 unsigned int cmd
, void *arg
)
2793 fs
= snd_enter_user();
2794 switch (substream
->stream
) {
2795 case SNDRV_PCM_STREAM_PLAYBACK
:
2796 result
= snd_pcm_playback_ioctl1(NULL
, substream
, cmd
,
2797 (void __user
*)arg
);
2799 case SNDRV_PCM_STREAM_CAPTURE
:
2800 result
= snd_pcm_capture_ioctl1(NULL
, substream
, cmd
,
2801 (void __user
*)arg
);
2811 EXPORT_SYMBOL(snd_pcm_kernel_ioctl
);
2813 static ssize_t
snd_pcm_read(struct file
*file
, char __user
*buf
, size_t count
,
2816 struct snd_pcm_file
*pcm_file
;
2817 struct snd_pcm_substream
*substream
;
2818 struct snd_pcm_runtime
*runtime
;
2819 snd_pcm_sframes_t result
;
2821 pcm_file
= file
->private_data
;
2822 substream
= pcm_file
->substream
;
2823 if (PCM_RUNTIME_CHECK(substream
))
2825 runtime
= substream
->runtime
;
2826 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2828 if (!frame_aligned(runtime
, count
))
2830 count
= bytes_to_frames(runtime
, count
);
2831 result
= snd_pcm_lib_read(substream
, buf
, count
);
2833 result
= frames_to_bytes(runtime
, result
);
2837 static ssize_t
snd_pcm_write(struct file
*file
, const char __user
*buf
,
2838 size_t count
, loff_t
* offset
)
2840 struct snd_pcm_file
*pcm_file
;
2841 struct snd_pcm_substream
*substream
;
2842 struct snd_pcm_runtime
*runtime
;
2843 snd_pcm_sframes_t result
;
2845 pcm_file
= file
->private_data
;
2846 substream
= pcm_file
->substream
;
2847 if (PCM_RUNTIME_CHECK(substream
))
2849 runtime
= substream
->runtime
;
2850 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2852 if (!frame_aligned(runtime
, count
))
2854 count
= bytes_to_frames(runtime
, count
);
2855 result
= snd_pcm_lib_write(substream
, buf
, count
);
2857 result
= frames_to_bytes(runtime
, result
);
2861 static ssize_t
snd_pcm_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
2862 unsigned long nr_segs
, loff_t pos
)
2865 struct snd_pcm_file
*pcm_file
;
2866 struct snd_pcm_substream
*substream
;
2867 struct snd_pcm_runtime
*runtime
;
2868 snd_pcm_sframes_t result
;
2871 snd_pcm_uframes_t frames
;
2873 pcm_file
= iocb
->ki_filp
->private_data
;
2874 substream
= pcm_file
->substream
;
2875 if (PCM_RUNTIME_CHECK(substream
))
2877 runtime
= substream
->runtime
;
2878 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2880 if (nr_segs
> 1024 || nr_segs
!= runtime
->channels
)
2882 if (!frame_aligned(runtime
, iov
->iov_len
))
2884 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2885 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2888 for (i
= 0; i
< nr_segs
; ++i
)
2889 bufs
[i
] = iov
[i
].iov_base
;
2890 result
= snd_pcm_lib_readv(substream
, bufs
, frames
);
2892 result
= frames_to_bytes(runtime
, result
);
2897 static ssize_t
snd_pcm_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
2898 unsigned long nr_segs
, loff_t pos
)
2900 struct snd_pcm_file
*pcm_file
;
2901 struct snd_pcm_substream
*substream
;
2902 struct snd_pcm_runtime
*runtime
;
2903 snd_pcm_sframes_t result
;
2906 snd_pcm_uframes_t frames
;
2908 pcm_file
= iocb
->ki_filp
->private_data
;
2909 substream
= pcm_file
->substream
;
2910 if (PCM_RUNTIME_CHECK(substream
))
2912 runtime
= substream
->runtime
;
2913 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2915 if (nr_segs
> 128 || nr_segs
!= runtime
->channels
||
2916 !frame_aligned(runtime
, iov
->iov_len
))
2918 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
2919 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
2922 for (i
= 0; i
< nr_segs
; ++i
)
2923 bufs
[i
] = iov
[i
].iov_base
;
2924 result
= snd_pcm_lib_writev(substream
, bufs
, frames
);
2926 result
= frames_to_bytes(runtime
, result
);
2931 static unsigned int snd_pcm_playback_poll(struct file
*file
, poll_table
* wait
)
2933 struct snd_pcm_file
*pcm_file
;
2934 struct snd_pcm_substream
*substream
;
2935 struct snd_pcm_runtime
*runtime
;
2937 snd_pcm_uframes_t avail
;
2939 pcm_file
= file
->private_data
;
2941 substream
= pcm_file
->substream
;
2942 if (PCM_RUNTIME_CHECK(substream
))
2944 runtime
= substream
->runtime
;
2946 poll_wait(file
, &runtime
->sleep
, wait
);
2948 snd_pcm_stream_lock_irq(substream
);
2949 avail
= snd_pcm_playback_avail(runtime
);
2950 switch (runtime
->status
->state
) {
2951 case SNDRV_PCM_STATE_RUNNING
:
2952 case SNDRV_PCM_STATE_PREPARED
:
2953 case SNDRV_PCM_STATE_PAUSED
:
2954 if (avail
>= runtime
->control
->avail_min
) {
2955 mask
= POLLOUT
| POLLWRNORM
;
2959 case SNDRV_PCM_STATE_DRAINING
:
2963 mask
= POLLOUT
| POLLWRNORM
| POLLERR
;
2966 snd_pcm_stream_unlock_irq(substream
);
2970 static unsigned int snd_pcm_capture_poll(struct file
*file
, poll_table
* wait
)
2972 struct snd_pcm_file
*pcm_file
;
2973 struct snd_pcm_substream
*substream
;
2974 struct snd_pcm_runtime
*runtime
;
2976 snd_pcm_uframes_t avail
;
2978 pcm_file
= file
->private_data
;
2980 substream
= pcm_file
->substream
;
2981 if (PCM_RUNTIME_CHECK(substream
))
2983 runtime
= substream
->runtime
;
2985 poll_wait(file
, &runtime
->sleep
, wait
);
2987 snd_pcm_stream_lock_irq(substream
);
2988 avail
= snd_pcm_capture_avail(runtime
);
2989 switch (runtime
->status
->state
) {
2990 case SNDRV_PCM_STATE_RUNNING
:
2991 case SNDRV_PCM_STATE_PREPARED
:
2992 case SNDRV_PCM_STATE_PAUSED
:
2993 if (avail
>= runtime
->control
->avail_min
) {
2994 mask
= POLLIN
| POLLRDNORM
;
2999 case SNDRV_PCM_STATE_DRAINING
:
3001 mask
= POLLIN
| POLLRDNORM
;
3006 mask
= POLLIN
| POLLRDNORM
| POLLERR
;
3009 snd_pcm_stream_unlock_irq(substream
);
3018 * Only on coherent architectures, we can mmap the status and the control records
3019 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3021 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3023 * mmap status record
3025 static int snd_pcm_mmap_status_fault(struct vm_area_struct
*area
,
3026 struct vm_fault
*vmf
)
3028 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3029 struct snd_pcm_runtime
*runtime
;
3031 if (substream
== NULL
)
3032 return VM_FAULT_SIGBUS
;
3033 runtime
= substream
->runtime
;
3034 vmf
->page
= virt_to_page(runtime
->status
);
3035 get_page(vmf
->page
);
3039 static const struct vm_operations_struct snd_pcm_vm_ops_status
=
3041 .fault
= snd_pcm_mmap_status_fault
,
3044 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3045 struct vm_area_struct
*area
)
3048 if (!(area
->vm_flags
& VM_READ
))
3050 size
= area
->vm_end
- area
->vm_start
;
3051 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)))
3053 area
->vm_ops
= &snd_pcm_vm_ops_status
;
3054 area
->vm_private_data
= substream
;
3055 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3060 * mmap control record
3062 static int snd_pcm_mmap_control_fault(struct vm_area_struct
*area
,
3063 struct vm_fault
*vmf
)
3065 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3066 struct snd_pcm_runtime
*runtime
;
3068 if (substream
== NULL
)
3069 return VM_FAULT_SIGBUS
;
3070 runtime
= substream
->runtime
;
3071 vmf
->page
= virt_to_page(runtime
->control
);
3072 get_page(vmf
->page
);
3076 static const struct vm_operations_struct snd_pcm_vm_ops_control
=
3078 .fault
= snd_pcm_mmap_control_fault
,
3081 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3082 struct vm_area_struct
*area
)
3085 if (!(area
->vm_flags
& VM_READ
))
3087 size
= area
->vm_end
- area
->vm_start
;
3088 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
)))
3090 area
->vm_ops
= &snd_pcm_vm_ops_control
;
3091 area
->vm_private_data
= substream
;
3092 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3095 #else /* ! coherent mmap */
3097 * don't support mmap for status and control records.
3099 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3100 struct vm_area_struct
*area
)
3104 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3105 struct vm_area_struct
*area
)
3109 #endif /* coherent mmap */
3111 static inline struct page
*
3112 snd_pcm_default_page_ops(struct snd_pcm_substream
*substream
, unsigned long ofs
)
3114 void *vaddr
= substream
->runtime
->dma_area
+ ofs
;
3115 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3116 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3117 return virt_to_page(CAC_ADDR(vaddr
));
3119 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3120 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
) {
3121 dma_addr_t addr
= substream
->runtime
->dma_addr
+ ofs
;
3122 addr
-= get_dma_offset(substream
->dma_buffer
.dev
.dev
);
3123 /* assume dma_handle set via pfn_to_phys() in
3124 * mm/dma-noncoherent.c
3126 return pfn_to_page(addr
>> PAGE_SHIFT
);
3129 return virt_to_page(vaddr
);
3133 * fault callback for mmapping a RAM page
3135 static int snd_pcm_mmap_data_fault(struct vm_area_struct
*area
,
3136 struct vm_fault
*vmf
)
3138 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3139 struct snd_pcm_runtime
*runtime
;
3140 unsigned long offset
;
3144 if (substream
== NULL
)
3145 return VM_FAULT_SIGBUS
;
3146 runtime
= substream
->runtime
;
3147 offset
= vmf
->pgoff
<< PAGE_SHIFT
;
3148 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3149 if (offset
> dma_bytes
- PAGE_SIZE
)
3150 return VM_FAULT_SIGBUS
;
3151 if (substream
->ops
->page
)
3152 page
= substream
->ops
->page(substream
, offset
);
3154 page
= snd_pcm_default_page_ops(substream
, offset
);
3156 return VM_FAULT_SIGBUS
;
3162 static const struct vm_operations_struct snd_pcm_vm_ops_data
= {
3163 .open
= snd_pcm_mmap_data_open
,
3164 .close
= snd_pcm_mmap_data_close
,
3167 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault
= {
3168 .open
= snd_pcm_mmap_data_open
,
3169 .close
= snd_pcm_mmap_data_close
,
3170 .fault
= snd_pcm_mmap_data_fault
,
3173 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3174 /* This should be defined / handled globally! */
3176 #define ARCH_HAS_DMA_MMAP_COHERENT
3181 * mmap the DMA buffer on RAM
3183 int snd_pcm_lib_default_mmap(struct snd_pcm_substream
*substream
,
3184 struct vm_area_struct
*area
)
3186 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3187 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3188 if (!substream
->ops
->page
&&
3189 substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3190 return dma_mmap_coherent(substream
->dma_buffer
.dev
.dev
,
3192 substream
->runtime
->dma_area
,
3193 substream
->runtime
->dma_addr
,
3194 area
->vm_end
- area
->vm_start
);
3195 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3196 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
&&
3197 !plat_device_is_coherent(substream
->dma_buffer
.dev
.dev
))
3198 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3199 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3200 /* mmap with fault handler */
3201 area
->vm_ops
= &snd_pcm_vm_ops_data_fault
;
3204 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap
);
3207 * mmap the DMA buffer on I/O memory area
3209 #if SNDRV_PCM_INFO_MMAP_IOMEM
3210 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream
*substream
,
3211 struct vm_area_struct
*area
)
3214 unsigned long offset
;
3216 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3217 area
->vm_flags
|= VM_IO
;
3218 size
= area
->vm_end
- area
->vm_start
;
3219 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3220 if (io_remap_pfn_range(area
, area
->vm_start
,
3221 (substream
->runtime
->dma_addr
+ offset
) >> PAGE_SHIFT
,
3222 size
, area
->vm_page_prot
))
3227 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem
);
3228 #endif /* SNDRV_PCM_INFO_MMAP */
3233 int snd_pcm_mmap_data(struct snd_pcm_substream
*substream
, struct file
*file
,
3234 struct vm_area_struct
*area
)
3236 struct snd_pcm_runtime
*runtime
;
3238 unsigned long offset
;
3242 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
3243 if (!(area
->vm_flags
& (VM_WRITE
|VM_READ
)))
3246 if (!(area
->vm_flags
& VM_READ
))
3249 runtime
= substream
->runtime
;
3250 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3252 if (!(runtime
->info
& SNDRV_PCM_INFO_MMAP
))
3254 if (runtime
->access
== SNDRV_PCM_ACCESS_RW_INTERLEAVED
||
3255 runtime
->access
== SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
)
3257 size
= area
->vm_end
- area
->vm_start
;
3258 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3259 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3260 if ((size_t)size
> dma_bytes
)
3262 if (offset
> dma_bytes
- size
)
3265 area
->vm_ops
= &snd_pcm_vm_ops_data
;
3266 area
->vm_private_data
= substream
;
3267 if (substream
->ops
->mmap
)
3268 err
= substream
->ops
->mmap(substream
, area
);
3270 err
= snd_pcm_lib_default_mmap(substream
, area
);
3272 atomic_inc(&substream
->mmap_count
);
3276 EXPORT_SYMBOL(snd_pcm_mmap_data
);
3278 static int snd_pcm_mmap(struct file
*file
, struct vm_area_struct
*area
)
3280 struct snd_pcm_file
* pcm_file
;
3281 struct snd_pcm_substream
*substream
;
3282 unsigned long offset
;
3284 pcm_file
= file
->private_data
;
3285 substream
= pcm_file
->substream
;
3286 if (PCM_RUNTIME_CHECK(substream
))
3289 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3291 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3292 if (pcm_file
->no_compat_mmap
)
3294 return snd_pcm_mmap_status(substream
, file
, area
);
3295 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3296 if (pcm_file
->no_compat_mmap
)
3298 return snd_pcm_mmap_control(substream
, file
, area
);
3300 return snd_pcm_mmap_data(substream
, file
, area
);
3305 static int snd_pcm_fasync(int fd
, struct file
* file
, int on
)
3307 struct snd_pcm_file
* pcm_file
;
3308 struct snd_pcm_substream
*substream
;
3309 struct snd_pcm_runtime
*runtime
;
3311 pcm_file
= file
->private_data
;
3312 substream
= pcm_file
->substream
;
3313 if (PCM_RUNTIME_CHECK(substream
))
3315 runtime
= substream
->runtime
;
3316 return fasync_helper(fd
, file
, on
, &runtime
->fasync
);
3322 #ifdef CONFIG_COMPAT
3323 #include "pcm_compat.c"
3325 #define snd_pcm_ioctl_compat NULL
3329 * To be removed helpers to keep binary compatibility
3332 #ifdef CONFIG_SND_SUPPORT_OLD_API
3333 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3334 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3336 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params
*params
,
3337 struct snd_pcm_hw_params_old
*oparams
)
3341 memset(params
, 0, sizeof(*params
));
3342 params
->flags
= oparams
->flags
;
3343 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3344 params
->masks
[i
].bits
[0] = oparams
->masks
[i
];
3345 memcpy(params
->intervals
, oparams
->intervals
, sizeof(oparams
->intervals
));
3346 params
->rmask
= __OLD_TO_NEW_MASK(oparams
->rmask
);
3347 params
->cmask
= __OLD_TO_NEW_MASK(oparams
->cmask
);
3348 params
->info
= oparams
->info
;
3349 params
->msbits
= oparams
->msbits
;
3350 params
->rate_num
= oparams
->rate_num
;
3351 params
->rate_den
= oparams
->rate_den
;
3352 params
->fifo_size
= oparams
->fifo_size
;
3355 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old
*oparams
,
3356 struct snd_pcm_hw_params
*params
)
3360 memset(oparams
, 0, sizeof(*oparams
));
3361 oparams
->flags
= params
->flags
;
3362 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3363 oparams
->masks
[i
] = params
->masks
[i
].bits
[0];
3364 memcpy(oparams
->intervals
, params
->intervals
, sizeof(oparams
->intervals
));
3365 oparams
->rmask
= __NEW_TO_OLD_MASK(params
->rmask
);
3366 oparams
->cmask
= __NEW_TO_OLD_MASK(params
->cmask
);
3367 oparams
->info
= params
->info
;
3368 oparams
->msbits
= params
->msbits
;
3369 oparams
->rate_num
= params
->rate_num
;
3370 oparams
->rate_den
= params
->rate_den
;
3371 oparams
->fifo_size
= params
->fifo_size
;
3374 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
3375 struct snd_pcm_hw_params_old __user
* _oparams
)
3377 struct snd_pcm_hw_params
*params
;
3378 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3381 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3385 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3386 if (IS_ERR(oparams
)) {
3387 err
= PTR_ERR(oparams
);
3390 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3391 err
= snd_pcm_hw_refine(substream
, params
);
3392 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3393 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3404 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
3405 struct snd_pcm_hw_params_old __user
* _oparams
)
3407 struct snd_pcm_hw_params
*params
;
3408 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3411 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3415 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3416 if (IS_ERR(oparams
)) {
3417 err
= PTR_ERR(oparams
);
3420 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3421 err
= snd_pcm_hw_params(substream
, params
);
3422 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3423 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3433 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3436 static unsigned long snd_pcm_get_unmapped_area(struct file
*file
,
3439 unsigned long pgoff
,
3440 unsigned long flags
)
3442 struct snd_pcm_file
*pcm_file
= file
->private_data
;
3443 struct snd_pcm_substream
*substream
= pcm_file
->substream
;
3444 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
3445 unsigned long offset
= pgoff
<< PAGE_SHIFT
;
3448 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3449 return (unsigned long)runtime
->status
;
3450 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3451 return (unsigned long)runtime
->control
;
3453 return (unsigned long)runtime
->dma_area
+ offset
;
3457 # define snd_pcm_get_unmapped_area NULL
3464 const struct file_operations snd_pcm_f_ops
[2] = {
3466 .owner
= THIS_MODULE
,
3467 .write
= snd_pcm_write
,
3468 .aio_write
= snd_pcm_aio_write
,
3469 .open
= snd_pcm_playback_open
,
3470 .release
= snd_pcm_release
,
3471 .llseek
= no_llseek
,
3472 .poll
= snd_pcm_playback_poll
,
3473 .unlocked_ioctl
= snd_pcm_playback_ioctl
,
3474 .compat_ioctl
= snd_pcm_ioctl_compat
,
3475 .mmap
= snd_pcm_mmap
,
3476 .fasync
= snd_pcm_fasync
,
3477 .get_unmapped_area
= snd_pcm_get_unmapped_area
,
3480 .owner
= THIS_MODULE
,
3481 .read
= snd_pcm_read
,
3482 .aio_read
= snd_pcm_aio_read
,
3483 .open
= snd_pcm_capture_open
,
3484 .release
= snd_pcm_release
,
3485 .llseek
= no_llseek
,
3486 .poll
= snd_pcm_capture_poll
,
3487 .unlocked_ioctl
= snd_pcm_capture_ioctl
,
3488 .compat_ioctl
= snd_pcm_ioctl_compat
,
3489 .mmap
= snd_pcm_mmap
,
3490 .fasync
= snd_pcm_fasync
,
3491 .get_unmapped_area
= snd_pcm_get_unmapped_area
,