2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/module.h>
24 #include <linux/file.h>
25 #include <linux/slab.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos.h>
28 #include <linux/aio.h>
29 #include <linux/dma-mapping.h>
30 #include <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/info.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/timer.h>
36 #include <sound/minors.h>
38 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
39 #include <dma-coherence.h>
46 struct snd_pcm_hw_params_old
{
48 unsigned int masks
[SNDRV_PCM_HW_PARAM_SUBFORMAT
-
49 SNDRV_PCM_HW_PARAM_ACCESS
+ 1];
50 struct snd_interval intervals
[SNDRV_PCM_HW_PARAM_TICK_TIME
-
51 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
+ 1];
56 unsigned int rate_num
;
57 unsigned int rate_den
;
58 snd_pcm_uframes_t fifo_size
;
59 unsigned char reserved
[64];
62 #ifdef CONFIG_SND_SUPPORT_OLD_API
63 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
64 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
66 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
67 struct snd_pcm_hw_params_old __user
* _oparams
);
68 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
69 struct snd_pcm_hw_params_old __user
* _oparams
);
71 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
);
77 static DEFINE_RWLOCK(snd_pcm_link_rwlock
);
78 static DECLARE_RWSEM(snd_pcm_link_rwsem
);
80 void snd_pcm_stream_lock(struct snd_pcm_substream
*substream
)
82 if (substream
->pcm
->nonatomic
) {
83 down_read(&snd_pcm_link_rwsem
);
84 mutex_lock(&substream
->self_group
.mutex
);
86 read_lock(&snd_pcm_link_rwlock
);
87 spin_lock(&substream
->self_group
.lock
);
90 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock
);
92 void snd_pcm_stream_unlock(struct snd_pcm_substream
*substream
)
94 if (substream
->pcm
->nonatomic
) {
95 mutex_unlock(&substream
->self_group
.mutex
);
96 up_read(&snd_pcm_link_rwsem
);
98 spin_unlock(&substream
->self_group
.lock
);
99 read_unlock(&snd_pcm_link_rwlock
);
102 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock
);
104 void snd_pcm_stream_lock_irq(struct snd_pcm_substream
*substream
)
106 if (!substream
->pcm
->nonatomic
)
108 snd_pcm_stream_lock(substream
);
110 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq
);
112 void snd_pcm_stream_unlock_irq(struct snd_pcm_substream
*substream
)
114 snd_pcm_stream_unlock(substream
);
115 if (!substream
->pcm
->nonatomic
)
118 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq
);
120 unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream
*substream
)
122 unsigned long flags
= 0;
123 if (!substream
->pcm
->nonatomic
)
124 local_irq_save(flags
);
125 snd_pcm_stream_lock(substream
);
128 EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave
);
130 void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream
*substream
,
133 snd_pcm_stream_unlock(substream
);
134 if (!substream
->pcm
->nonatomic
)
135 local_irq_restore(flags
);
137 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore
);
139 static inline mm_segment_t
snd_enter_user(void)
141 mm_segment_t fs
= get_fs();
146 static inline void snd_leave_user(mm_segment_t fs
)
153 int snd_pcm_info(struct snd_pcm_substream
*substream
, struct snd_pcm_info
*info
)
155 struct snd_pcm_runtime
*runtime
;
156 struct snd_pcm
*pcm
= substream
->pcm
;
157 struct snd_pcm_str
*pstr
= substream
->pstr
;
159 memset(info
, 0, sizeof(*info
));
160 info
->card
= pcm
->card
->number
;
161 info
->device
= pcm
->device
;
162 info
->stream
= substream
->stream
;
163 info
->subdevice
= substream
->number
;
164 strlcpy(info
->id
, pcm
->id
, sizeof(info
->id
));
165 strlcpy(info
->name
, pcm
->name
, sizeof(info
->name
));
166 info
->dev_class
= pcm
->dev_class
;
167 info
->dev_subclass
= pcm
->dev_subclass
;
168 info
->subdevices_count
= pstr
->substream_count
;
169 info
->subdevices_avail
= pstr
->substream_count
- pstr
->substream_opened
;
170 strlcpy(info
->subname
, substream
->name
, sizeof(info
->subname
));
171 runtime
= substream
->runtime
;
172 /* AB: FIXME!!! This is definitely nonsense */
174 info
->sync
= runtime
->sync
;
175 substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_INFO
, info
);
180 int snd_pcm_info_user(struct snd_pcm_substream
*substream
,
181 struct snd_pcm_info __user
* _info
)
183 struct snd_pcm_info
*info
;
186 info
= kmalloc(sizeof(*info
), GFP_KERNEL
);
189 err
= snd_pcm_info(substream
, info
);
191 if (copy_to_user(_info
, info
, sizeof(*info
)))
201 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
202 static const char * const snd_pcm_hw_param_names
[] = {
206 HW_PARAM(SAMPLE_BITS
),
207 HW_PARAM(FRAME_BITS
),
210 HW_PARAM(PERIOD_TIME
),
211 HW_PARAM(PERIOD_SIZE
),
212 HW_PARAM(PERIOD_BYTES
),
214 HW_PARAM(BUFFER_TIME
),
215 HW_PARAM(BUFFER_SIZE
),
216 HW_PARAM(BUFFER_BYTES
),
221 int snd_pcm_hw_refine(struct snd_pcm_substream
*substream
,
222 struct snd_pcm_hw_params
*params
)
225 struct snd_pcm_hardware
*hw
;
226 struct snd_interval
*i
= NULL
;
227 struct snd_mask
*m
= NULL
;
228 struct snd_pcm_hw_constraints
*constrs
= &substream
->runtime
->hw_constraints
;
229 unsigned int rstamps
[constrs
->rules_num
];
230 unsigned int vstamps
[SNDRV_PCM_HW_PARAM_LAST_INTERVAL
+ 1];
231 unsigned int stamp
= 2;
235 params
->fifo_size
= 0;
236 if (params
->rmask
& (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS
))
238 if (params
->rmask
& (1 << SNDRV_PCM_HW_PARAM_RATE
)) {
239 params
->rate_num
= 0;
240 params
->rate_den
= 0;
243 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
244 m
= hw_param_mask(params
, k
);
245 if (snd_mask_empty(m
))
247 if (!(params
->rmask
& (1 << k
)))
250 pr_debug("%s = ", snd_pcm_hw_param_names
[k
]);
251 pr_cont("%04x%04x%04x%04x -> ", m
->bits
[3], m
->bits
[2], m
->bits
[1], m
->bits
[0]);
253 changed
= snd_mask_refine(m
, constrs_mask(constrs
, k
));
255 pr_cont("%04x%04x%04x%04x\n", m
->bits
[3], m
->bits
[2], m
->bits
[1], m
->bits
[0]);
258 params
->cmask
|= 1 << k
;
263 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
264 i
= hw_param_interval(params
, k
);
265 if (snd_interval_empty(i
))
267 if (!(params
->rmask
& (1 << k
)))
270 pr_debug("%s = ", snd_pcm_hw_param_names
[k
]);
275 i
->openmin
? '(' : '[', i
->min
,
276 i
->max
, i
->openmax
? ')' : ']');
279 changed
= snd_interval_refine(i
, constrs_interval(constrs
, k
));
284 pr_cont("%c%u %u%c\n",
285 i
->openmin
? '(' : '[', i
->min
,
286 i
->max
, i
->openmax
? ')' : ']');
289 params
->cmask
|= 1 << k
;
294 for (k
= 0; k
< constrs
->rules_num
; k
++)
296 for (k
= 0; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++)
297 vstamps
[k
] = (params
->rmask
& (1 << k
)) ? 1 : 0;
300 for (k
= 0; k
< constrs
->rules_num
; k
++) {
301 struct snd_pcm_hw_rule
*r
= &constrs
->rules
[k
];
304 if (r
->cond
&& !(r
->cond
& params
->flags
))
306 for (d
= 0; r
->deps
[d
] >= 0; d
++) {
307 if (vstamps
[r
->deps
[d
]] > rstamps
[k
]) {
315 pr_debug("Rule %d [%p]: ", k
, r
->func
);
317 pr_cont("%s = ", snd_pcm_hw_param_names
[r
->var
]);
318 if (hw_is_mask(r
->var
)) {
319 m
= hw_param_mask(params
, r
->var
);
320 pr_cont("%x", *m
->bits
);
322 i
= hw_param_interval(params
, r
->var
);
327 i
->openmin
? '(' : '[', i
->min
,
328 i
->max
, i
->openmax
? ')' : ']');
332 changed
= r
->func(params
, r
);
336 if (hw_is_mask(r
->var
))
337 pr_cont("%x", *m
->bits
);
343 i
->openmin
? '(' : '[', i
->min
,
344 i
->max
, i
->openmax
? ')' : ']');
350 if (changed
&& r
->var
>= 0) {
351 params
->cmask
|= (1 << r
->var
);
352 vstamps
[r
->var
] = stamp
;
360 if (!params
->msbits
) {
361 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
);
362 if (snd_interval_single(i
))
363 params
->msbits
= snd_interval_value(i
);
366 if (!params
->rate_den
) {
367 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
368 if (snd_interval_single(i
)) {
369 params
->rate_num
= snd_interval_value(i
);
370 params
->rate_den
= 1;
374 hw
= &substream
->runtime
->hw
;
376 params
->info
= hw
->info
& ~SNDRV_PCM_INFO_FIFO_IN_FRAMES
;
377 if (!params
->fifo_size
) {
378 m
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
379 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
380 if (snd_mask_min(m
) == snd_mask_max(m
) &&
381 snd_interval_min(i
) == snd_interval_max(i
)) {
382 changed
= substream
->ops
->ioctl(substream
,
383 SNDRV_PCM_IOCTL1_FIFO_SIZE
, params
);
392 EXPORT_SYMBOL(snd_pcm_hw_refine
);
394 static int snd_pcm_hw_refine_user(struct snd_pcm_substream
*substream
,
395 struct snd_pcm_hw_params __user
* _params
)
397 struct snd_pcm_hw_params
*params
;
400 params
= memdup_user(_params
, sizeof(*params
));
402 return PTR_ERR(params
);
404 err
= snd_pcm_hw_refine(substream
, params
);
405 if (copy_to_user(_params
, params
, sizeof(*params
))) {
414 static int period_to_usecs(struct snd_pcm_runtime
*runtime
)
419 return -1; /* invalid */
421 /* take 75% of period time as the deadline */
422 usecs
= (750000 / runtime
->rate
) * runtime
->period_size
;
423 usecs
+= ((750000 % runtime
->rate
) * runtime
->period_size
) /
429 static void snd_pcm_set_state(struct snd_pcm_substream
*substream
, int state
)
431 snd_pcm_stream_lock_irq(substream
);
432 if (substream
->runtime
->status
->state
!= SNDRV_PCM_STATE_DISCONNECTED
)
433 substream
->runtime
->status
->state
= state
;
434 snd_pcm_stream_unlock_irq(substream
);
437 static int snd_pcm_hw_params(struct snd_pcm_substream
*substream
,
438 struct snd_pcm_hw_params
*params
)
440 struct snd_pcm_runtime
*runtime
;
443 snd_pcm_uframes_t frames
;
445 if (PCM_RUNTIME_CHECK(substream
))
447 runtime
= substream
->runtime
;
448 snd_pcm_stream_lock_irq(substream
);
449 switch (runtime
->status
->state
) {
450 case SNDRV_PCM_STATE_OPEN
:
451 case SNDRV_PCM_STATE_SETUP
:
452 case SNDRV_PCM_STATE_PREPARED
:
455 snd_pcm_stream_unlock_irq(substream
);
458 snd_pcm_stream_unlock_irq(substream
);
459 #if IS_ENABLED(CONFIG_SND_PCM_OSS)
460 if (!substream
->oss
.oss
)
462 if (atomic_read(&substream
->mmap_count
))
466 err
= snd_pcm_hw_refine(substream
, params
);
470 err
= snd_pcm_hw_params_choose(substream
, params
);
474 if (substream
->ops
->hw_params
!= NULL
) {
475 err
= substream
->ops
->hw_params(substream
, params
);
480 runtime
->access
= params_access(params
);
481 runtime
->format
= params_format(params
);
482 runtime
->subformat
= params_subformat(params
);
483 runtime
->channels
= params_channels(params
);
484 runtime
->rate
= params_rate(params
);
485 runtime
->period_size
= params_period_size(params
);
486 runtime
->periods
= params_periods(params
);
487 runtime
->buffer_size
= params_buffer_size(params
);
488 runtime
->info
= params
->info
;
489 runtime
->rate_num
= params
->rate_num
;
490 runtime
->rate_den
= params
->rate_den
;
491 runtime
->no_period_wakeup
=
492 (params
->info
& SNDRV_PCM_INFO_NO_PERIOD_WAKEUP
) &&
493 (params
->flags
& SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP
);
495 bits
= snd_pcm_format_physical_width(runtime
->format
);
496 runtime
->sample_bits
= bits
;
497 bits
*= runtime
->channels
;
498 runtime
->frame_bits
= bits
;
500 while (bits
% 8 != 0) {
504 runtime
->byte_align
= bits
/ 8;
505 runtime
->min_align
= frames
;
507 /* Default sw params */
508 runtime
->tstamp_mode
= SNDRV_PCM_TSTAMP_NONE
;
509 runtime
->period_step
= 1;
510 runtime
->control
->avail_min
= runtime
->period_size
;
511 runtime
->start_threshold
= 1;
512 runtime
->stop_threshold
= runtime
->buffer_size
;
513 runtime
->silence_threshold
= 0;
514 runtime
->silence_size
= 0;
515 runtime
->boundary
= runtime
->buffer_size
;
516 while (runtime
->boundary
* 2 <= LONG_MAX
- runtime
->buffer_size
)
517 runtime
->boundary
*= 2;
519 snd_pcm_timer_resolution_change(substream
);
520 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_SETUP
);
522 if (pm_qos_request_active(&substream
->latency_pm_qos_req
))
523 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
524 if ((usecs
= period_to_usecs(runtime
)) >= 0)
525 pm_qos_add_request(&substream
->latency_pm_qos_req
,
526 PM_QOS_CPU_DMA_LATENCY
, usecs
);
529 /* hardware might be unusable from this time,
530 so we force application to retry to set
531 the correct hardware parameter settings */
532 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_OPEN
);
533 if (substream
->ops
->hw_free
!= NULL
)
534 substream
->ops
->hw_free(substream
);
538 static int snd_pcm_hw_params_user(struct snd_pcm_substream
*substream
,
539 struct snd_pcm_hw_params __user
* _params
)
541 struct snd_pcm_hw_params
*params
;
544 params
= memdup_user(_params
, sizeof(*params
));
546 return PTR_ERR(params
);
548 err
= snd_pcm_hw_params(substream
, params
);
549 if (copy_to_user(_params
, params
, sizeof(*params
))) {
558 static int snd_pcm_hw_free(struct snd_pcm_substream
*substream
)
560 struct snd_pcm_runtime
*runtime
;
563 if (PCM_RUNTIME_CHECK(substream
))
565 runtime
= substream
->runtime
;
566 snd_pcm_stream_lock_irq(substream
);
567 switch (runtime
->status
->state
) {
568 case SNDRV_PCM_STATE_SETUP
:
569 case SNDRV_PCM_STATE_PREPARED
:
572 snd_pcm_stream_unlock_irq(substream
);
575 snd_pcm_stream_unlock_irq(substream
);
576 if (atomic_read(&substream
->mmap_count
))
578 if (substream
->ops
->hw_free
)
579 result
= substream
->ops
->hw_free(substream
);
580 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_OPEN
);
581 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
585 static int snd_pcm_sw_params(struct snd_pcm_substream
*substream
,
586 struct snd_pcm_sw_params
*params
)
588 struct snd_pcm_runtime
*runtime
;
591 if (PCM_RUNTIME_CHECK(substream
))
593 runtime
= substream
->runtime
;
594 snd_pcm_stream_lock_irq(substream
);
595 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
596 snd_pcm_stream_unlock_irq(substream
);
599 snd_pcm_stream_unlock_irq(substream
);
601 if (params
->tstamp_mode
> SNDRV_PCM_TSTAMP_LAST
)
603 if (params
->proto
>= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
604 params
->tstamp_type
> SNDRV_PCM_TSTAMP_TYPE_LAST
)
606 if (params
->avail_min
== 0)
608 if (params
->silence_size
>= runtime
->boundary
) {
609 if (params
->silence_threshold
!= 0)
612 if (params
->silence_size
> params
->silence_threshold
)
614 if (params
->silence_threshold
> runtime
->buffer_size
)
618 snd_pcm_stream_lock_irq(substream
);
619 runtime
->tstamp_mode
= params
->tstamp_mode
;
620 if (params
->proto
>= SNDRV_PROTOCOL_VERSION(2, 0, 12))
621 runtime
->tstamp_type
= params
->tstamp_type
;
622 runtime
->period_step
= params
->period_step
;
623 runtime
->control
->avail_min
= params
->avail_min
;
624 runtime
->start_threshold
= params
->start_threshold
;
625 runtime
->stop_threshold
= params
->stop_threshold
;
626 runtime
->silence_threshold
= params
->silence_threshold
;
627 runtime
->silence_size
= params
->silence_size
;
628 params
->boundary
= runtime
->boundary
;
629 if (snd_pcm_running(substream
)) {
630 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
631 runtime
->silence_size
> 0)
632 snd_pcm_playback_silence(substream
, ULONG_MAX
);
633 err
= snd_pcm_update_state(substream
, runtime
);
635 snd_pcm_stream_unlock_irq(substream
);
639 static int snd_pcm_sw_params_user(struct snd_pcm_substream
*substream
,
640 struct snd_pcm_sw_params __user
* _params
)
642 struct snd_pcm_sw_params params
;
644 if (copy_from_user(¶ms
, _params
, sizeof(params
)))
646 err
= snd_pcm_sw_params(substream
, ¶ms
);
647 if (copy_to_user(_params
, ¶ms
, sizeof(params
)))
652 int snd_pcm_status(struct snd_pcm_substream
*substream
,
653 struct snd_pcm_status
*status
)
655 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
657 snd_pcm_stream_lock_irq(substream
);
658 status
->state
= runtime
->status
->state
;
659 status
->suspended_state
= runtime
->status
->suspended_state
;
660 if (status
->state
== SNDRV_PCM_STATE_OPEN
)
662 status
->trigger_tstamp
= runtime
->trigger_tstamp
;
663 if (snd_pcm_running(substream
)) {
664 snd_pcm_update_hw_ptr(substream
);
665 if (runtime
->tstamp_mode
== SNDRV_PCM_TSTAMP_ENABLE
) {
666 status
->tstamp
= runtime
->status
->tstamp
;
667 status
->audio_tstamp
=
668 runtime
->status
->audio_tstamp
;
672 snd_pcm_gettime(runtime
, &status
->tstamp
);
674 status
->appl_ptr
= runtime
->control
->appl_ptr
;
675 status
->hw_ptr
= runtime
->status
->hw_ptr
;
676 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
677 status
->avail
= snd_pcm_playback_avail(runtime
);
678 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
||
679 runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
680 status
->delay
= runtime
->buffer_size
- status
->avail
;
681 status
->delay
+= runtime
->delay
;
685 status
->avail
= snd_pcm_capture_avail(runtime
);
686 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
)
687 status
->delay
= status
->avail
+ runtime
->delay
;
691 status
->avail_max
= runtime
->avail_max
;
692 status
->overrange
= runtime
->overrange
;
693 runtime
->avail_max
= 0;
694 runtime
->overrange
= 0;
696 snd_pcm_stream_unlock_irq(substream
);
700 static int snd_pcm_status_user(struct snd_pcm_substream
*substream
,
701 struct snd_pcm_status __user
* _status
)
703 struct snd_pcm_status status
;
706 memset(&status
, 0, sizeof(status
));
707 res
= snd_pcm_status(substream
, &status
);
710 if (copy_to_user(_status
, &status
, sizeof(status
)))
715 static int snd_pcm_channel_info(struct snd_pcm_substream
*substream
,
716 struct snd_pcm_channel_info
* info
)
718 struct snd_pcm_runtime
*runtime
;
719 unsigned int channel
;
721 channel
= info
->channel
;
722 runtime
= substream
->runtime
;
723 snd_pcm_stream_lock_irq(substream
);
724 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
725 snd_pcm_stream_unlock_irq(substream
);
728 snd_pcm_stream_unlock_irq(substream
);
729 if (channel
>= runtime
->channels
)
731 memset(info
, 0, sizeof(*info
));
732 info
->channel
= channel
;
733 return substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_CHANNEL_INFO
, info
);
736 static int snd_pcm_channel_info_user(struct snd_pcm_substream
*substream
,
737 struct snd_pcm_channel_info __user
* _info
)
739 struct snd_pcm_channel_info info
;
742 if (copy_from_user(&info
, _info
, sizeof(info
)))
744 res
= snd_pcm_channel_info(substream
, &info
);
747 if (copy_to_user(_info
, &info
, sizeof(info
)))
752 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream
*substream
)
754 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
755 if (runtime
->trigger_master
== NULL
)
757 if (runtime
->trigger_master
== substream
) {
758 snd_pcm_gettime(runtime
, &runtime
->trigger_tstamp
);
760 snd_pcm_trigger_tstamp(runtime
->trigger_master
);
761 runtime
->trigger_tstamp
= runtime
->trigger_master
->runtime
->trigger_tstamp
;
763 runtime
->trigger_master
= NULL
;
767 int (*pre_action
)(struct snd_pcm_substream
*substream
, int state
);
768 int (*do_action
)(struct snd_pcm_substream
*substream
, int state
);
769 void (*undo_action
)(struct snd_pcm_substream
*substream
, int state
);
770 void (*post_action
)(struct snd_pcm_substream
*substream
, int state
);
774 * this functions is core for handling of linked stream
775 * Note: the stream state might be changed also on failure
776 * Note2: call with calling stream lock + link lock
778 static int snd_pcm_action_group(struct action_ops
*ops
,
779 struct snd_pcm_substream
*substream
,
780 int state
, int do_lock
)
782 struct snd_pcm_substream
*s
= NULL
;
783 struct snd_pcm_substream
*s1
;
786 snd_pcm_group_for_each_entry(s
, substream
) {
787 if (do_lock
&& s
!= substream
) {
788 if (s
->pcm
->nonatomic
)
789 mutex_lock_nested(&s
->self_group
.mutex
,
790 SINGLE_DEPTH_NESTING
);
792 spin_lock_nested(&s
->self_group
.lock
,
793 SINGLE_DEPTH_NESTING
);
795 res
= ops
->pre_action(s
, state
);
799 snd_pcm_group_for_each_entry(s
, substream
) {
800 res
= ops
->do_action(s
, state
);
802 if (ops
->undo_action
) {
803 snd_pcm_group_for_each_entry(s1
, substream
) {
804 if (s1
== s
) /* failed stream */
806 ops
->undo_action(s1
, state
);
809 s
= NULL
; /* unlock all */
813 snd_pcm_group_for_each_entry(s
, substream
) {
814 ops
->post_action(s
, state
);
819 snd_pcm_group_for_each_entry(s1
, substream
) {
820 if (s1
!= substream
) {
821 if (s1
->pcm
->nonatomic
)
822 mutex_unlock(&s1
->self_group
.mutex
);
824 spin_unlock(&s1
->self_group
.lock
);
826 if (s1
== s
) /* end */
834 * Note: call with stream lock
836 static int snd_pcm_action_single(struct action_ops
*ops
,
837 struct snd_pcm_substream
*substream
,
842 res
= ops
->pre_action(substream
, state
);
845 res
= ops
->do_action(substream
, state
);
847 ops
->post_action(substream
, state
);
848 else if (ops
->undo_action
)
849 ops
->undo_action(substream
, state
);
853 /* call in mutex-protected context */
854 static int snd_pcm_action_mutex(struct action_ops
*ops
,
855 struct snd_pcm_substream
*substream
,
860 if (snd_pcm_stream_linked(substream
)) {
861 if (!mutex_trylock(&substream
->group
->mutex
)) {
862 mutex_unlock(&substream
->self_group
.mutex
);
863 mutex_lock(&substream
->group
->mutex
);
864 mutex_lock(&substream
->self_group
.mutex
);
866 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
867 mutex_unlock(&substream
->group
->mutex
);
869 res
= snd_pcm_action_single(ops
, substream
, state
);
875 * Note: call with stream lock
877 static int snd_pcm_action(struct action_ops
*ops
,
878 struct snd_pcm_substream
*substream
,
883 if (substream
->pcm
->nonatomic
)
884 return snd_pcm_action_mutex(ops
, substream
, state
);
886 if (snd_pcm_stream_linked(substream
)) {
887 if (!spin_trylock(&substream
->group
->lock
)) {
888 spin_unlock(&substream
->self_group
.lock
);
889 spin_lock(&substream
->group
->lock
);
890 spin_lock(&substream
->self_group
.lock
);
892 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
893 spin_unlock(&substream
->group
->lock
);
895 res
= snd_pcm_action_single(ops
, substream
, state
);
900 static int snd_pcm_action_lock_mutex(struct action_ops
*ops
,
901 struct snd_pcm_substream
*substream
,
906 down_read(&snd_pcm_link_rwsem
);
907 if (snd_pcm_stream_linked(substream
)) {
908 mutex_lock(&substream
->group
->mutex
);
909 mutex_lock_nested(&substream
->self_group
.mutex
,
910 SINGLE_DEPTH_NESTING
);
911 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
912 mutex_unlock(&substream
->self_group
.mutex
);
913 mutex_unlock(&substream
->group
->mutex
);
915 mutex_lock(&substream
->self_group
.mutex
);
916 res
= snd_pcm_action_single(ops
, substream
, state
);
917 mutex_unlock(&substream
->self_group
.mutex
);
919 up_read(&snd_pcm_link_rwsem
);
924 * Note: don't use any locks before
926 static int snd_pcm_action_lock_irq(struct action_ops
*ops
,
927 struct snd_pcm_substream
*substream
,
932 if (substream
->pcm
->nonatomic
)
933 return snd_pcm_action_lock_mutex(ops
, substream
, state
);
935 read_lock_irq(&snd_pcm_link_rwlock
);
936 if (snd_pcm_stream_linked(substream
)) {
937 spin_lock(&substream
->group
->lock
);
938 spin_lock(&substream
->self_group
.lock
);
939 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
940 spin_unlock(&substream
->self_group
.lock
);
941 spin_unlock(&substream
->group
->lock
);
943 spin_lock(&substream
->self_group
.lock
);
944 res
= snd_pcm_action_single(ops
, substream
, state
);
945 spin_unlock(&substream
->self_group
.lock
);
947 read_unlock_irq(&snd_pcm_link_rwlock
);
953 static int snd_pcm_action_nonatomic(struct action_ops
*ops
,
954 struct snd_pcm_substream
*substream
,
959 down_read(&snd_pcm_link_rwsem
);
960 if (snd_pcm_stream_linked(substream
))
961 res
= snd_pcm_action_group(ops
, substream
, state
, 0);
963 res
= snd_pcm_action_single(ops
, substream
, state
);
964 up_read(&snd_pcm_link_rwsem
);
971 static int snd_pcm_pre_start(struct snd_pcm_substream
*substream
, int state
)
973 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
974 if (runtime
->status
->state
!= SNDRV_PCM_STATE_PREPARED
)
976 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
977 !snd_pcm_playback_data(substream
))
979 runtime
->trigger_master
= substream
;
983 static int snd_pcm_do_start(struct snd_pcm_substream
*substream
, int state
)
985 if (substream
->runtime
->trigger_master
!= substream
)
987 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_START
);
990 static void snd_pcm_undo_start(struct snd_pcm_substream
*substream
, int state
)
992 if (substream
->runtime
->trigger_master
== substream
)
993 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
996 static void snd_pcm_post_start(struct snd_pcm_substream
*substream
, int state
)
998 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
999 snd_pcm_trigger_tstamp(substream
);
1000 runtime
->hw_ptr_jiffies
= jiffies
;
1001 runtime
->hw_ptr_buffer_jiffies
= (runtime
->buffer_size
* HZ
) /
1003 runtime
->status
->state
= state
;
1004 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
1005 runtime
->silence_size
> 0)
1006 snd_pcm_playback_silence(substream
, ULONG_MAX
);
1007 if (substream
->timer
)
1008 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTART
,
1009 &runtime
->trigger_tstamp
);
1012 static struct action_ops snd_pcm_action_start
= {
1013 .pre_action
= snd_pcm_pre_start
,
1014 .do_action
= snd_pcm_do_start
,
1015 .undo_action
= snd_pcm_undo_start
,
1016 .post_action
= snd_pcm_post_start
1020 * snd_pcm_start - start all linked streams
1021 * @substream: the PCM substream instance
1023 * Return: Zero if successful, or a negative error code.
1025 int snd_pcm_start(struct snd_pcm_substream
*substream
)
1027 return snd_pcm_action(&snd_pcm_action_start
, substream
,
1028 SNDRV_PCM_STATE_RUNNING
);
1034 static int snd_pcm_pre_stop(struct snd_pcm_substream
*substream
, int state
)
1036 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1037 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1039 runtime
->trigger_master
= substream
;
1043 static int snd_pcm_do_stop(struct snd_pcm_substream
*substream
, int state
)
1045 if (substream
->runtime
->trigger_master
== substream
&&
1046 snd_pcm_running(substream
))
1047 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
1048 return 0; /* unconditonally stop all substreams */
1051 static void snd_pcm_post_stop(struct snd_pcm_substream
*substream
, int state
)
1053 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1054 if (runtime
->status
->state
!= state
) {
1055 snd_pcm_trigger_tstamp(substream
);
1056 if (substream
->timer
)
1057 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTOP
,
1058 &runtime
->trigger_tstamp
);
1059 runtime
->status
->state
= state
;
1061 wake_up(&runtime
->sleep
);
1062 wake_up(&runtime
->tsleep
);
1065 static struct action_ops snd_pcm_action_stop
= {
1066 .pre_action
= snd_pcm_pre_stop
,
1067 .do_action
= snd_pcm_do_stop
,
1068 .post_action
= snd_pcm_post_stop
1072 * snd_pcm_stop - try to stop all running streams in the substream group
1073 * @substream: the PCM substream instance
1074 * @state: PCM state after stopping the stream
1076 * The state of each stream is then changed to the given state unconditionally.
1078 * Return: Zero if successful, or a negative error code.
1080 int snd_pcm_stop(struct snd_pcm_substream
*substream
, snd_pcm_state_t state
)
1082 return snd_pcm_action(&snd_pcm_action_stop
, substream
, state
);
1085 EXPORT_SYMBOL(snd_pcm_stop
);
1088 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
1089 * @substream: the PCM substream
1091 * After stopping, the state is changed to SETUP.
1092 * Unlike snd_pcm_stop(), this affects only the given stream.
1094 * Return: Zero if succesful, or a negative error code.
1096 int snd_pcm_drain_done(struct snd_pcm_substream
*substream
)
1098 return snd_pcm_action_single(&snd_pcm_action_stop
, substream
,
1099 SNDRV_PCM_STATE_SETUP
);
1105 static int snd_pcm_pre_pause(struct snd_pcm_substream
*substream
, int push
)
1107 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1108 if (!(runtime
->info
& SNDRV_PCM_INFO_PAUSE
))
1111 if (runtime
->status
->state
!= SNDRV_PCM_STATE_RUNNING
)
1113 } else if (runtime
->status
->state
!= SNDRV_PCM_STATE_PAUSED
)
1115 runtime
->trigger_master
= substream
;
1119 static int snd_pcm_do_pause(struct snd_pcm_substream
*substream
, int push
)
1121 if (substream
->runtime
->trigger_master
!= substream
)
1123 /* some drivers might use hw_ptr to recover from the pause -
1124 update the hw_ptr now */
1126 snd_pcm_update_hw_ptr(substream
);
1127 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1128 * a delta between the current jiffies, this gives a large enough
1129 * delta, effectively to skip the check once.
1131 substream
->runtime
->hw_ptr_jiffies
= jiffies
- HZ
* 1000;
1132 return substream
->ops
->trigger(substream
,
1133 push
? SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
1134 SNDRV_PCM_TRIGGER_PAUSE_RELEASE
);
1137 static void snd_pcm_undo_pause(struct snd_pcm_substream
*substream
, int push
)
1139 if (substream
->runtime
->trigger_master
== substream
)
1140 substream
->ops
->trigger(substream
,
1141 push
? SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1142 SNDRV_PCM_TRIGGER_PAUSE_PUSH
);
1145 static void snd_pcm_post_pause(struct snd_pcm_substream
*substream
, int push
)
1147 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1148 snd_pcm_trigger_tstamp(substream
);
1150 runtime
->status
->state
= SNDRV_PCM_STATE_PAUSED
;
1151 if (substream
->timer
)
1152 snd_timer_notify(substream
->timer
,
1153 SNDRV_TIMER_EVENT_MPAUSE
,
1154 &runtime
->trigger_tstamp
);
1155 wake_up(&runtime
->sleep
);
1156 wake_up(&runtime
->tsleep
);
1158 runtime
->status
->state
= SNDRV_PCM_STATE_RUNNING
;
1159 if (substream
->timer
)
1160 snd_timer_notify(substream
->timer
,
1161 SNDRV_TIMER_EVENT_MCONTINUE
,
1162 &runtime
->trigger_tstamp
);
1166 static struct action_ops snd_pcm_action_pause
= {
1167 .pre_action
= snd_pcm_pre_pause
,
1168 .do_action
= snd_pcm_do_pause
,
1169 .undo_action
= snd_pcm_undo_pause
,
1170 .post_action
= snd_pcm_post_pause
1174 * Push/release the pause for all linked streams.
1176 static int snd_pcm_pause(struct snd_pcm_substream
*substream
, int push
)
1178 return snd_pcm_action(&snd_pcm_action_pause
, substream
, push
);
1184 static int snd_pcm_pre_suspend(struct snd_pcm_substream
*substream
, int state
)
1186 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1187 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1189 runtime
->trigger_master
= substream
;
1193 static int snd_pcm_do_suspend(struct snd_pcm_substream
*substream
, int state
)
1195 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1196 if (runtime
->trigger_master
!= substream
)
1198 if (! snd_pcm_running(substream
))
1200 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1201 return 0; /* suspend unconditionally */
1204 static void snd_pcm_post_suspend(struct snd_pcm_substream
*substream
, int state
)
1206 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1207 snd_pcm_trigger_tstamp(substream
);
1208 if (substream
->timer
)
1209 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSUSPEND
,
1210 &runtime
->trigger_tstamp
);
1211 runtime
->status
->suspended_state
= runtime
->status
->state
;
1212 runtime
->status
->state
= SNDRV_PCM_STATE_SUSPENDED
;
1213 wake_up(&runtime
->sleep
);
1214 wake_up(&runtime
->tsleep
);
1217 static struct action_ops snd_pcm_action_suspend
= {
1218 .pre_action
= snd_pcm_pre_suspend
,
1219 .do_action
= snd_pcm_do_suspend
,
1220 .post_action
= snd_pcm_post_suspend
1224 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1225 * @substream: the PCM substream
1227 * After this call, all streams are changed to SUSPENDED state.
1229 * Return: Zero if successful (or @substream is %NULL), or a negative error
1232 int snd_pcm_suspend(struct snd_pcm_substream
*substream
)
1235 unsigned long flags
;
1240 snd_pcm_stream_lock_irqsave(substream
, flags
);
1241 err
= snd_pcm_action(&snd_pcm_action_suspend
, substream
, 0);
1242 snd_pcm_stream_unlock_irqrestore(substream
, flags
);
1246 EXPORT_SYMBOL(snd_pcm_suspend
);
1249 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1250 * @pcm: the PCM instance
1252 * After this call, all streams are changed to SUSPENDED state.
1254 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1256 int snd_pcm_suspend_all(struct snd_pcm
*pcm
)
1258 struct snd_pcm_substream
*substream
;
1259 int stream
, err
= 0;
1264 for (stream
= 0; stream
< 2; stream
++) {
1265 for (substream
= pcm
->streams
[stream
].substream
;
1266 substream
; substream
= substream
->next
) {
1267 /* FIXME: the open/close code should lock this as well */
1268 if (substream
->runtime
== NULL
)
1270 err
= snd_pcm_suspend(substream
);
1271 if (err
< 0 && err
!= -EBUSY
)
1278 EXPORT_SYMBOL(snd_pcm_suspend_all
);
1282 static int snd_pcm_pre_resume(struct snd_pcm_substream
*substream
, int state
)
1284 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1285 if (!(runtime
->info
& SNDRV_PCM_INFO_RESUME
))
1287 runtime
->trigger_master
= substream
;
1291 static int snd_pcm_do_resume(struct snd_pcm_substream
*substream
, int state
)
1293 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1294 if (runtime
->trigger_master
!= substream
)
1296 /* DMA not running previously? */
1297 if (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_RUNNING
&&
1298 (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_DRAINING
||
1299 substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
1301 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_RESUME
);
1304 static void snd_pcm_undo_resume(struct snd_pcm_substream
*substream
, int state
)
1306 if (substream
->runtime
->trigger_master
== substream
&&
1307 snd_pcm_running(substream
))
1308 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1311 static void snd_pcm_post_resume(struct snd_pcm_substream
*substream
, int state
)
1313 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1314 snd_pcm_trigger_tstamp(substream
);
1315 if (substream
->timer
)
1316 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MRESUME
,
1317 &runtime
->trigger_tstamp
);
1318 runtime
->status
->state
= runtime
->status
->suspended_state
;
1321 static struct action_ops snd_pcm_action_resume
= {
1322 .pre_action
= snd_pcm_pre_resume
,
1323 .do_action
= snd_pcm_do_resume
,
1324 .undo_action
= snd_pcm_undo_resume
,
1325 .post_action
= snd_pcm_post_resume
1328 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1330 struct snd_card
*card
= substream
->pcm
->card
;
1333 snd_power_lock(card
);
1334 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1335 res
= snd_pcm_action_lock_irq(&snd_pcm_action_resume
, substream
, 0);
1336 snd_power_unlock(card
);
1342 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1347 #endif /* CONFIG_PM */
1352 * Change the RUNNING stream(s) to XRUN state.
1354 static int snd_pcm_xrun(struct snd_pcm_substream
*substream
)
1356 struct snd_card
*card
= substream
->pcm
->card
;
1357 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1360 snd_power_lock(card
);
1361 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1362 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1367 snd_pcm_stream_lock_irq(substream
);
1368 switch (runtime
->status
->state
) {
1369 case SNDRV_PCM_STATE_XRUN
:
1370 result
= 0; /* already there */
1372 case SNDRV_PCM_STATE_RUNNING
:
1373 result
= snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
1378 snd_pcm_stream_unlock_irq(substream
);
1380 snd_power_unlock(card
);
1387 static int snd_pcm_pre_reset(struct snd_pcm_substream
*substream
, int state
)
1389 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1390 switch (runtime
->status
->state
) {
1391 case SNDRV_PCM_STATE_RUNNING
:
1392 case SNDRV_PCM_STATE_PREPARED
:
1393 case SNDRV_PCM_STATE_PAUSED
:
1394 case SNDRV_PCM_STATE_SUSPENDED
:
1401 static int snd_pcm_do_reset(struct snd_pcm_substream
*substream
, int state
)
1403 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1404 int err
= substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_RESET
, NULL
);
1407 runtime
->hw_ptr_base
= 0;
1408 runtime
->hw_ptr_interrupt
= runtime
->status
->hw_ptr
-
1409 runtime
->status
->hw_ptr
% runtime
->period_size
;
1410 runtime
->silence_start
= runtime
->status
->hw_ptr
;
1411 runtime
->silence_filled
= 0;
1415 static void snd_pcm_post_reset(struct snd_pcm_substream
*substream
, int state
)
1417 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1418 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1419 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
1420 runtime
->silence_size
> 0)
1421 snd_pcm_playback_silence(substream
, ULONG_MAX
);
1424 static struct action_ops snd_pcm_action_reset
= {
1425 .pre_action
= snd_pcm_pre_reset
,
1426 .do_action
= snd_pcm_do_reset
,
1427 .post_action
= snd_pcm_post_reset
1430 static int snd_pcm_reset(struct snd_pcm_substream
*substream
)
1432 return snd_pcm_action_nonatomic(&snd_pcm_action_reset
, substream
, 0);
1438 /* we use the second argument for updating f_flags */
1439 static int snd_pcm_pre_prepare(struct snd_pcm_substream
*substream
,
1442 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1443 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1444 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
)
1446 if (snd_pcm_running(substream
))
1448 substream
->f_flags
= f_flags
;
1452 static int snd_pcm_do_prepare(struct snd_pcm_substream
*substream
, int state
)
1455 err
= substream
->ops
->prepare(substream
);
1458 return snd_pcm_do_reset(substream
, 0);
1461 static void snd_pcm_post_prepare(struct snd_pcm_substream
*substream
, int state
)
1463 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1464 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1465 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_PREPARED
);
1468 static struct action_ops snd_pcm_action_prepare
= {
1469 .pre_action
= snd_pcm_pre_prepare
,
1470 .do_action
= snd_pcm_do_prepare
,
1471 .post_action
= snd_pcm_post_prepare
1475 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1476 * @substream: the PCM substream instance
1477 * @file: file to refer f_flags
1479 * Return: Zero if successful, or a negative error code.
1481 static int snd_pcm_prepare(struct snd_pcm_substream
*substream
,
1485 struct snd_card
*card
= substream
->pcm
->card
;
1489 f_flags
= file
->f_flags
;
1491 f_flags
= substream
->f_flags
;
1493 snd_power_lock(card
);
1494 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1495 res
= snd_pcm_action_nonatomic(&snd_pcm_action_prepare
,
1496 substream
, f_flags
);
1497 snd_power_unlock(card
);
1505 static int snd_pcm_pre_drain_init(struct snd_pcm_substream
*substream
, int state
)
1507 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1508 switch (runtime
->status
->state
) {
1509 case SNDRV_PCM_STATE_OPEN
:
1510 case SNDRV_PCM_STATE_DISCONNECTED
:
1511 case SNDRV_PCM_STATE_SUSPENDED
:
1514 runtime
->trigger_master
= substream
;
1518 static int snd_pcm_do_drain_init(struct snd_pcm_substream
*substream
, int state
)
1520 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1521 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
1522 switch (runtime
->status
->state
) {
1523 case SNDRV_PCM_STATE_PREPARED
:
1524 /* start playback stream if possible */
1525 if (! snd_pcm_playback_empty(substream
)) {
1526 snd_pcm_do_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1527 snd_pcm_post_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1530 case SNDRV_PCM_STATE_RUNNING
:
1531 runtime
->status
->state
= SNDRV_PCM_STATE_DRAINING
;
1533 case SNDRV_PCM_STATE_XRUN
:
1534 runtime
->status
->state
= SNDRV_PCM_STATE_SETUP
;
1540 /* stop running stream */
1541 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
) {
1542 int new_state
= snd_pcm_capture_avail(runtime
) > 0 ?
1543 SNDRV_PCM_STATE_DRAINING
: SNDRV_PCM_STATE_SETUP
;
1544 snd_pcm_do_stop(substream
, new_state
);
1545 snd_pcm_post_stop(substream
, new_state
);
1551 static void snd_pcm_post_drain_init(struct snd_pcm_substream
*substream
, int state
)
1555 static struct action_ops snd_pcm_action_drain_init
= {
1556 .pre_action
= snd_pcm_pre_drain_init
,
1557 .do_action
= snd_pcm_do_drain_init
,
1558 .post_action
= snd_pcm_post_drain_init
1561 static int snd_pcm_drop(struct snd_pcm_substream
*substream
);
1564 * Drain the stream(s).
1565 * When the substream is linked, sync until the draining of all playback streams
1567 * After this call, all streams are supposed to be either SETUP or DRAINING
1568 * (capture only) state.
1570 static int snd_pcm_drain(struct snd_pcm_substream
*substream
,
1573 struct snd_card
*card
;
1574 struct snd_pcm_runtime
*runtime
;
1575 struct snd_pcm_substream
*s
;
1580 card
= substream
->pcm
->card
;
1581 runtime
= substream
->runtime
;
1583 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1586 snd_power_lock(card
);
1587 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1588 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1590 snd_power_unlock(card
);
1596 if (file
->f_flags
& O_NONBLOCK
)
1598 } else if (substream
->f_flags
& O_NONBLOCK
)
1601 down_read(&snd_pcm_link_rwsem
);
1602 snd_pcm_stream_lock_irq(substream
);
1604 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1605 snd_pcm_pause(substream
, 0);
1607 /* pre-start/stop - all running streams are changed to DRAINING state */
1608 result
= snd_pcm_action(&snd_pcm_action_drain_init
, substream
, 0);
1611 /* in non-blocking, we don't wait in ioctl but let caller poll */
1619 struct snd_pcm_runtime
*to_check
;
1620 if (signal_pending(current
)) {
1621 result
= -ERESTARTSYS
;
1624 /* find a substream to drain */
1626 snd_pcm_group_for_each_entry(s
, substream
) {
1627 if (s
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
)
1629 runtime
= s
->runtime
;
1630 if (runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
1636 break; /* all drained */
1637 init_waitqueue_entry(&wait
, current
);
1638 add_wait_queue(&to_check
->sleep
, &wait
);
1639 snd_pcm_stream_unlock_irq(substream
);
1640 up_read(&snd_pcm_link_rwsem
);
1641 snd_power_unlock(card
);
1642 if (runtime
->no_period_wakeup
)
1643 tout
= MAX_SCHEDULE_TIMEOUT
;
1646 if (runtime
->rate
) {
1647 long t
= runtime
->period_size
* 2 / runtime
->rate
;
1648 tout
= max(t
, tout
);
1650 tout
= msecs_to_jiffies(tout
* 1000);
1652 tout
= schedule_timeout_interruptible(tout
);
1653 snd_power_lock(card
);
1654 down_read(&snd_pcm_link_rwsem
);
1655 snd_pcm_stream_lock_irq(substream
);
1656 remove_wait_queue(&to_check
->sleep
, &wait
);
1657 if (card
->shutdown
) {
1662 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1665 dev_dbg(substream
->pcm
->card
->dev
,
1666 "playback drain error (DMA or IRQ trouble?)\n");
1667 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1675 snd_pcm_stream_unlock_irq(substream
);
1676 up_read(&snd_pcm_link_rwsem
);
1677 snd_power_unlock(card
);
1685 * Immediately put all linked substreams into SETUP state.
1687 static int snd_pcm_drop(struct snd_pcm_substream
*substream
)
1689 struct snd_pcm_runtime
*runtime
;
1692 if (PCM_RUNTIME_CHECK(substream
))
1694 runtime
= substream
->runtime
;
1696 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1697 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
||
1698 runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1701 snd_pcm_stream_lock_irq(substream
);
1703 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1704 snd_pcm_pause(substream
, 0);
1706 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1707 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1708 snd_pcm_stream_unlock_irq(substream
);
1714 static bool is_pcm_file(struct file
*file
)
1716 struct inode
*inode
= file_inode(file
);
1719 if (!S_ISCHR(inode
->i_mode
) || imajor(inode
) != snd_major
)
1721 minor
= iminor(inode
);
1722 return snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_PLAYBACK
) ||
1723 snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
1729 static int snd_pcm_link(struct snd_pcm_substream
*substream
, int fd
)
1732 struct snd_pcm_file
*pcm_file
;
1733 struct snd_pcm_substream
*substream1
;
1734 struct snd_pcm_group
*group
;
1735 struct fd f
= fdget(fd
);
1739 if (!is_pcm_file(f
.file
)) {
1743 pcm_file
= f
.file
->private_data
;
1744 substream1
= pcm_file
->substream
;
1745 group
= kmalloc(sizeof(*group
), GFP_KERNEL
);
1750 down_write(&snd_pcm_link_rwsem
);
1751 write_lock_irq(&snd_pcm_link_rwlock
);
1752 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1753 substream
->runtime
->status
->state
!= substream1
->runtime
->status
->state
||
1754 substream
->pcm
->nonatomic
!= substream1
->pcm
->nonatomic
) {
1758 if (snd_pcm_stream_linked(substream1
)) {
1762 if (!snd_pcm_stream_linked(substream
)) {
1763 substream
->group
= group
;
1765 spin_lock_init(&substream
->group
->lock
);
1766 mutex_init(&substream
->group
->mutex
);
1767 INIT_LIST_HEAD(&substream
->group
->substreams
);
1768 list_add_tail(&substream
->link_list
, &substream
->group
->substreams
);
1769 substream
->group
->count
= 1;
1771 list_add_tail(&substream1
->link_list
, &substream
->group
->substreams
);
1772 substream
->group
->count
++;
1773 substream1
->group
= substream
->group
;
1775 write_unlock_irq(&snd_pcm_link_rwlock
);
1776 up_write(&snd_pcm_link_rwsem
);
1778 snd_card_unref(substream1
->pcm
->card
);
1785 static void relink_to_local(struct snd_pcm_substream
*substream
)
1787 substream
->group
= &substream
->self_group
;
1788 INIT_LIST_HEAD(&substream
->self_group
.substreams
);
1789 list_add_tail(&substream
->link_list
, &substream
->self_group
.substreams
);
1792 static int snd_pcm_unlink(struct snd_pcm_substream
*substream
)
1794 struct snd_pcm_substream
*s
;
1797 down_write(&snd_pcm_link_rwsem
);
1798 write_lock_irq(&snd_pcm_link_rwlock
);
1799 if (!snd_pcm_stream_linked(substream
)) {
1803 list_del(&substream
->link_list
);
1804 substream
->group
->count
--;
1805 if (substream
->group
->count
== 1) { /* detach the last stream, too */
1806 snd_pcm_group_for_each_entry(s
, substream
) {
1810 kfree(substream
->group
);
1812 relink_to_local(substream
);
1814 write_unlock_irq(&snd_pcm_link_rwlock
);
1815 up_write(&snd_pcm_link_rwsem
);
1822 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params
*params
,
1823 struct snd_pcm_hw_rule
*rule
)
1825 struct snd_interval t
;
1826 snd_interval_mul(hw_param_interval_c(params
, rule
->deps
[0]),
1827 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1828 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1831 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params
*params
,
1832 struct snd_pcm_hw_rule
*rule
)
1834 struct snd_interval t
;
1835 snd_interval_div(hw_param_interval_c(params
, rule
->deps
[0]),
1836 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1837 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1840 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params
*params
,
1841 struct snd_pcm_hw_rule
*rule
)
1843 struct snd_interval t
;
1844 snd_interval_muldivk(hw_param_interval_c(params
, rule
->deps
[0]),
1845 hw_param_interval_c(params
, rule
->deps
[1]),
1846 (unsigned long) rule
->private, &t
);
1847 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1850 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params
*params
,
1851 struct snd_pcm_hw_rule
*rule
)
1853 struct snd_interval t
;
1854 snd_interval_mulkdiv(hw_param_interval_c(params
, rule
->deps
[0]),
1855 (unsigned long) rule
->private,
1856 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1857 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1860 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params
*params
,
1861 struct snd_pcm_hw_rule
*rule
)
1864 struct snd_interval
*i
= hw_param_interval(params
, rule
->deps
[0]);
1866 struct snd_mask
*mask
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1868 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1870 if (! snd_mask_test(mask
, k
))
1872 bits
= snd_pcm_format_physical_width(k
);
1874 continue; /* ignore invalid formats */
1875 if ((unsigned)bits
< i
->min
|| (unsigned)bits
> i
->max
)
1876 snd_mask_reset(&m
, k
);
1878 return snd_mask_refine(mask
, &m
);
1881 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params
*params
,
1882 struct snd_pcm_hw_rule
*rule
)
1884 struct snd_interval t
;
1890 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1892 if (! snd_mask_test(hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
), k
))
1894 bits
= snd_pcm_format_physical_width(k
);
1896 continue; /* ignore invalid formats */
1897 if (t
.min
> (unsigned)bits
)
1899 if (t
.max
< (unsigned)bits
)
1903 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1906 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1907 #error "Change this table"
1910 static unsigned int rates
[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1911 48000, 64000, 88200, 96000, 176400, 192000 };
1913 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates
= {
1914 .count
= ARRAY_SIZE(rates
),
1918 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params
*params
,
1919 struct snd_pcm_hw_rule
*rule
)
1921 struct snd_pcm_hardware
*hw
= rule
->private;
1922 return snd_interval_list(hw_param_interval(params
, rule
->var
),
1923 snd_pcm_known_rates
.count
,
1924 snd_pcm_known_rates
.list
, hw
->rates
);
1927 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params
*params
,
1928 struct snd_pcm_hw_rule
*rule
)
1930 struct snd_interval t
;
1931 struct snd_pcm_substream
*substream
= rule
->private;
1933 t
.max
= substream
->buffer_bytes_max
;
1937 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1940 int snd_pcm_hw_constraints_init(struct snd_pcm_substream
*substream
)
1942 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1943 struct snd_pcm_hw_constraints
*constrs
= &runtime
->hw_constraints
;
1946 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
1947 snd_mask_any(constrs_mask(constrs
, k
));
1950 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
1951 snd_interval_any(constrs_interval(constrs
, k
));
1954 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_CHANNELS
));
1955 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
));
1956 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
));
1957 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
));
1958 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_FRAME_BITS
));
1960 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1961 snd_pcm_hw_rule_format
, NULL
,
1962 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1965 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1966 snd_pcm_hw_rule_sample_bits
, NULL
,
1967 SNDRV_PCM_HW_PARAM_FORMAT
,
1968 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1971 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1972 snd_pcm_hw_rule_div
, NULL
,
1973 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1976 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1977 snd_pcm_hw_rule_mul
, NULL
,
1978 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1981 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1982 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1983 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
1986 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1987 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
1988 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, -1);
1991 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
1992 snd_pcm_hw_rule_div
, NULL
,
1993 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1996 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
1997 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
1998 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
, -1);
2001 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
2002 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
2003 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_BUFFER_TIME
, -1);
2006 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIODS
,
2007 snd_pcm_hw_rule_div
, NULL
,
2008 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
2011 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
2012 snd_pcm_hw_rule_div
, NULL
,
2013 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
2016 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
2017 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
2018 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
2021 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
2022 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
2023 SNDRV_PCM_HW_PARAM_PERIOD_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
2026 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
2027 snd_pcm_hw_rule_mul
, NULL
,
2028 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
2031 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
2032 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
2033 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
2036 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
2037 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
2038 SNDRV_PCM_HW_PARAM_BUFFER_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
2041 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
2042 snd_pcm_hw_rule_muldivk
, (void*) 8,
2043 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
2046 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
2047 snd_pcm_hw_rule_muldivk
, (void*) 8,
2048 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
2051 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
2052 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
2053 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
2056 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME
,
2057 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
2058 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
2064 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream
*substream
)
2066 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2067 struct snd_pcm_hardware
*hw
= &runtime
->hw
;
2069 unsigned int mask
= 0;
2071 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
2072 mask
|= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED
;
2073 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
2074 mask
|= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
;
2075 if (hw
->info
& SNDRV_PCM_INFO_MMAP
) {
2076 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
2077 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED
;
2078 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
2079 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED
;
2080 if (hw
->info
& SNDRV_PCM_INFO_COMPLEX
)
2081 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX
;
2083 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_ACCESS
, mask
);
2087 err
= snd_pcm_hw_constraint_mask64(runtime
, SNDRV_PCM_HW_PARAM_FORMAT
, hw
->formats
);
2091 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_SUBFORMAT
, 1 << SNDRV_PCM_SUBFORMAT_STD
);
2095 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_CHANNELS
,
2096 hw
->channels_min
, hw
->channels_max
);
2100 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_RATE
,
2101 hw
->rate_min
, hw
->rate_max
);
2105 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
2106 hw
->period_bytes_min
, hw
->period_bytes_max
);
2110 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIODS
,
2111 hw
->periods_min
, hw
->periods_max
);
2115 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
2116 hw
->period_bytes_min
, hw
->buffer_bytes_max
);
2120 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
2121 snd_pcm_hw_rule_buffer_bytes_max
, substream
,
2122 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, -1);
2127 if (runtime
->dma_bytes
) {
2128 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, 0, runtime
->dma_bytes
);
2133 if (!(hw
->rates
& (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))) {
2134 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
2135 snd_pcm_hw_rule_rate
, hw
,
2136 SNDRV_PCM_HW_PARAM_RATE
, -1);
2141 /* FIXME: this belong to lowlevel */
2142 snd_pcm_hw_constraint_integer(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
);
2147 static void pcm_release_private(struct snd_pcm_substream
*substream
)
2149 snd_pcm_unlink(substream
);
2152 void snd_pcm_release_substream(struct snd_pcm_substream
*substream
)
2154 substream
->ref_count
--;
2155 if (substream
->ref_count
> 0)
2158 snd_pcm_drop(substream
);
2159 if (substream
->hw_opened
) {
2160 if (substream
->ops
->hw_free
!= NULL
)
2161 substream
->ops
->hw_free(substream
);
2162 substream
->ops
->close(substream
);
2163 substream
->hw_opened
= 0;
2165 if (pm_qos_request_active(&substream
->latency_pm_qos_req
))
2166 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
2167 if (substream
->pcm_release
) {
2168 substream
->pcm_release(substream
);
2169 substream
->pcm_release
= NULL
;
2171 snd_pcm_detach_substream(substream
);
2174 EXPORT_SYMBOL(snd_pcm_release_substream
);
2176 int snd_pcm_open_substream(struct snd_pcm
*pcm
, int stream
,
2178 struct snd_pcm_substream
**rsubstream
)
2180 struct snd_pcm_substream
*substream
;
2183 err
= snd_pcm_attach_substream(pcm
, stream
, file
, &substream
);
2186 if (substream
->ref_count
> 1) {
2187 *rsubstream
= substream
;
2191 err
= snd_pcm_hw_constraints_init(substream
);
2193 pcm_dbg(pcm
, "snd_pcm_hw_constraints_init failed\n");
2197 if ((err
= substream
->ops
->open(substream
)) < 0)
2200 substream
->hw_opened
= 1;
2202 err
= snd_pcm_hw_constraints_complete(substream
);
2204 pcm_dbg(pcm
, "snd_pcm_hw_constraints_complete failed\n");
2208 *rsubstream
= substream
;
2212 snd_pcm_release_substream(substream
);
2216 EXPORT_SYMBOL(snd_pcm_open_substream
);
2218 static int snd_pcm_open_file(struct file
*file
,
2219 struct snd_pcm
*pcm
,
2222 struct snd_pcm_file
*pcm_file
;
2223 struct snd_pcm_substream
*substream
;
2226 err
= snd_pcm_open_substream(pcm
, stream
, file
, &substream
);
2230 pcm_file
= kzalloc(sizeof(*pcm_file
), GFP_KERNEL
);
2231 if (pcm_file
== NULL
) {
2232 snd_pcm_release_substream(substream
);
2235 pcm_file
->substream
= substream
;
2236 if (substream
->ref_count
== 1) {
2237 substream
->file
= pcm_file
;
2238 substream
->pcm_release
= pcm_release_private
;
2240 file
->private_data
= pcm_file
;
2245 static int snd_pcm_playback_open(struct inode
*inode
, struct file
*file
)
2247 struct snd_pcm
*pcm
;
2248 int err
= nonseekable_open(inode
, file
);
2251 pcm
= snd_lookup_minor_data(iminor(inode
),
2252 SNDRV_DEVICE_TYPE_PCM_PLAYBACK
);
2253 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_PLAYBACK
);
2255 snd_card_unref(pcm
->card
);
2259 static int snd_pcm_capture_open(struct inode
*inode
, struct file
*file
)
2261 struct snd_pcm
*pcm
;
2262 int err
= nonseekable_open(inode
, file
);
2265 pcm
= snd_lookup_minor_data(iminor(inode
),
2266 SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
2267 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_CAPTURE
);
2269 snd_card_unref(pcm
->card
);
2273 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
)
2282 err
= snd_card_file_add(pcm
->card
, file
);
2285 if (!try_module_get(pcm
->card
->module
)) {
2289 init_waitqueue_entry(&wait
, current
);
2290 add_wait_queue(&pcm
->open_wait
, &wait
);
2291 mutex_lock(&pcm
->open_mutex
);
2293 err
= snd_pcm_open_file(file
, pcm
, stream
);
2296 if (err
== -EAGAIN
) {
2297 if (file
->f_flags
& O_NONBLOCK
) {
2303 set_current_state(TASK_INTERRUPTIBLE
);
2304 mutex_unlock(&pcm
->open_mutex
);
2306 mutex_lock(&pcm
->open_mutex
);
2307 if (pcm
->card
->shutdown
) {
2311 if (signal_pending(current
)) {
2316 remove_wait_queue(&pcm
->open_wait
, &wait
);
2317 mutex_unlock(&pcm
->open_mutex
);
2323 module_put(pcm
->card
->module
);
2325 snd_card_file_remove(pcm
->card
, file
);
2330 static int snd_pcm_release(struct inode
*inode
, struct file
*file
)
2332 struct snd_pcm
*pcm
;
2333 struct snd_pcm_substream
*substream
;
2334 struct snd_pcm_file
*pcm_file
;
2336 pcm_file
= file
->private_data
;
2337 substream
= pcm_file
->substream
;
2338 if (snd_BUG_ON(!substream
))
2340 pcm
= substream
->pcm
;
2341 mutex_lock(&pcm
->open_mutex
);
2342 snd_pcm_release_substream(substream
);
2344 mutex_unlock(&pcm
->open_mutex
);
2345 wake_up(&pcm
->open_wait
);
2346 module_put(pcm
->card
->module
);
2347 snd_card_file_remove(pcm
->card
, file
);
2351 static snd_pcm_sframes_t
snd_pcm_playback_rewind(struct snd_pcm_substream
*substream
,
2352 snd_pcm_uframes_t frames
)
2354 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2355 snd_pcm_sframes_t appl_ptr
;
2356 snd_pcm_sframes_t ret
;
2357 snd_pcm_sframes_t hw_avail
;
2362 snd_pcm_stream_lock_irq(substream
);
2363 switch (runtime
->status
->state
) {
2364 case SNDRV_PCM_STATE_PREPARED
:
2366 case SNDRV_PCM_STATE_DRAINING
:
2367 case SNDRV_PCM_STATE_RUNNING
:
2368 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2371 case SNDRV_PCM_STATE_XRUN
:
2374 case SNDRV_PCM_STATE_SUSPENDED
:
2382 hw_avail
= snd_pcm_playback_hw_avail(runtime
);
2383 if (hw_avail
<= 0) {
2387 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2389 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2391 appl_ptr
+= runtime
->boundary
;
2392 runtime
->control
->appl_ptr
= appl_ptr
;
2395 snd_pcm_stream_unlock_irq(substream
);
2399 static snd_pcm_sframes_t
snd_pcm_capture_rewind(struct snd_pcm_substream
*substream
,
2400 snd_pcm_uframes_t frames
)
2402 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2403 snd_pcm_sframes_t appl_ptr
;
2404 snd_pcm_sframes_t ret
;
2405 snd_pcm_sframes_t hw_avail
;
2410 snd_pcm_stream_lock_irq(substream
);
2411 switch (runtime
->status
->state
) {
2412 case SNDRV_PCM_STATE_PREPARED
:
2413 case SNDRV_PCM_STATE_DRAINING
:
2415 case SNDRV_PCM_STATE_RUNNING
:
2416 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2419 case SNDRV_PCM_STATE_XRUN
:
2422 case SNDRV_PCM_STATE_SUSPENDED
:
2430 hw_avail
= snd_pcm_capture_hw_avail(runtime
);
2431 if (hw_avail
<= 0) {
2435 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2437 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2439 appl_ptr
+= runtime
->boundary
;
2440 runtime
->control
->appl_ptr
= appl_ptr
;
2443 snd_pcm_stream_unlock_irq(substream
);
2447 static snd_pcm_sframes_t
snd_pcm_playback_forward(struct snd_pcm_substream
*substream
,
2448 snd_pcm_uframes_t frames
)
2450 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2451 snd_pcm_sframes_t appl_ptr
;
2452 snd_pcm_sframes_t ret
;
2453 snd_pcm_sframes_t avail
;
2458 snd_pcm_stream_lock_irq(substream
);
2459 switch (runtime
->status
->state
) {
2460 case SNDRV_PCM_STATE_PREPARED
:
2461 case SNDRV_PCM_STATE_PAUSED
:
2463 case SNDRV_PCM_STATE_DRAINING
:
2464 case SNDRV_PCM_STATE_RUNNING
:
2465 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2468 case SNDRV_PCM_STATE_XRUN
:
2471 case SNDRV_PCM_STATE_SUSPENDED
:
2479 avail
= snd_pcm_playback_avail(runtime
);
2484 if (frames
> (snd_pcm_uframes_t
)avail
)
2486 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2487 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2488 appl_ptr
-= runtime
->boundary
;
2489 runtime
->control
->appl_ptr
= appl_ptr
;
2492 snd_pcm_stream_unlock_irq(substream
);
2496 static snd_pcm_sframes_t
snd_pcm_capture_forward(struct snd_pcm_substream
*substream
,
2497 snd_pcm_uframes_t frames
)
2499 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2500 snd_pcm_sframes_t appl_ptr
;
2501 snd_pcm_sframes_t ret
;
2502 snd_pcm_sframes_t avail
;
2507 snd_pcm_stream_lock_irq(substream
);
2508 switch (runtime
->status
->state
) {
2509 case SNDRV_PCM_STATE_PREPARED
:
2510 case SNDRV_PCM_STATE_DRAINING
:
2511 case SNDRV_PCM_STATE_PAUSED
:
2513 case SNDRV_PCM_STATE_RUNNING
:
2514 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2517 case SNDRV_PCM_STATE_XRUN
:
2520 case SNDRV_PCM_STATE_SUSPENDED
:
2528 avail
= snd_pcm_capture_avail(runtime
);
2533 if (frames
> (snd_pcm_uframes_t
)avail
)
2535 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2536 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2537 appl_ptr
-= runtime
->boundary
;
2538 runtime
->control
->appl_ptr
= appl_ptr
;
2541 snd_pcm_stream_unlock_irq(substream
);
2545 static int snd_pcm_hwsync(struct snd_pcm_substream
*substream
)
2547 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2550 snd_pcm_stream_lock_irq(substream
);
2551 switch (runtime
->status
->state
) {
2552 case SNDRV_PCM_STATE_DRAINING
:
2553 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2556 case SNDRV_PCM_STATE_RUNNING
:
2557 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2560 case SNDRV_PCM_STATE_PREPARED
:
2561 case SNDRV_PCM_STATE_SUSPENDED
:
2564 case SNDRV_PCM_STATE_XRUN
:
2572 snd_pcm_stream_unlock_irq(substream
);
2576 static int snd_pcm_delay(struct snd_pcm_substream
*substream
,
2577 snd_pcm_sframes_t __user
*res
)
2579 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2581 snd_pcm_sframes_t n
= 0;
2583 snd_pcm_stream_lock_irq(substream
);
2584 switch (runtime
->status
->state
) {
2585 case SNDRV_PCM_STATE_DRAINING
:
2586 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2589 case SNDRV_PCM_STATE_RUNNING
:
2590 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2593 case SNDRV_PCM_STATE_PREPARED
:
2594 case SNDRV_PCM_STATE_SUSPENDED
:
2596 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2597 n
= snd_pcm_playback_hw_avail(runtime
);
2599 n
= snd_pcm_capture_avail(runtime
);
2600 n
+= runtime
->delay
;
2602 case SNDRV_PCM_STATE_XRUN
:
2610 snd_pcm_stream_unlock_irq(substream
);
2612 if (put_user(n
, res
))
2617 static int snd_pcm_sync_ptr(struct snd_pcm_substream
*substream
,
2618 struct snd_pcm_sync_ptr __user
*_sync_ptr
)
2620 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2621 struct snd_pcm_sync_ptr sync_ptr
;
2622 volatile struct snd_pcm_mmap_status
*status
;
2623 volatile struct snd_pcm_mmap_control
*control
;
2626 memset(&sync_ptr
, 0, sizeof(sync_ptr
));
2627 if (get_user(sync_ptr
.flags
, (unsigned __user
*)&(_sync_ptr
->flags
)))
2629 if (copy_from_user(&sync_ptr
.c
.control
, &(_sync_ptr
->c
.control
), sizeof(struct snd_pcm_mmap_control
)))
2631 status
= runtime
->status
;
2632 control
= runtime
->control
;
2633 if (sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_HWSYNC
) {
2634 err
= snd_pcm_hwsync(substream
);
2638 snd_pcm_stream_lock_irq(substream
);
2639 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_APPL
))
2640 control
->appl_ptr
= sync_ptr
.c
.control
.appl_ptr
;
2642 sync_ptr
.c
.control
.appl_ptr
= control
->appl_ptr
;
2643 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_AVAIL_MIN
))
2644 control
->avail_min
= sync_ptr
.c
.control
.avail_min
;
2646 sync_ptr
.c
.control
.avail_min
= control
->avail_min
;
2647 sync_ptr
.s
.status
.state
= status
->state
;
2648 sync_ptr
.s
.status
.hw_ptr
= status
->hw_ptr
;
2649 sync_ptr
.s
.status
.tstamp
= status
->tstamp
;
2650 sync_ptr
.s
.status
.suspended_state
= status
->suspended_state
;
2651 snd_pcm_stream_unlock_irq(substream
);
2652 if (copy_to_user(_sync_ptr
, &sync_ptr
, sizeof(sync_ptr
)))
2657 static int snd_pcm_tstamp(struct snd_pcm_substream
*substream
, int __user
*_arg
)
2659 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2662 if (get_user(arg
, _arg
))
2664 if (arg
< 0 || arg
> SNDRV_PCM_TSTAMP_TYPE_LAST
)
2666 runtime
->tstamp_type
= arg
;
2670 static int snd_pcm_common_ioctl1(struct file
*file
,
2671 struct snd_pcm_substream
*substream
,
2672 unsigned int cmd
, void __user
*arg
)
2675 case SNDRV_PCM_IOCTL_PVERSION
:
2676 return put_user(SNDRV_PCM_VERSION
, (int __user
*)arg
) ? -EFAULT
: 0;
2677 case SNDRV_PCM_IOCTL_INFO
:
2678 return snd_pcm_info_user(substream
, arg
);
2679 case SNDRV_PCM_IOCTL_TSTAMP
: /* just for compatibility */
2681 case SNDRV_PCM_IOCTL_TTSTAMP
:
2682 return snd_pcm_tstamp(substream
, arg
);
2683 case SNDRV_PCM_IOCTL_HW_REFINE
:
2684 return snd_pcm_hw_refine_user(substream
, arg
);
2685 case SNDRV_PCM_IOCTL_HW_PARAMS
:
2686 return snd_pcm_hw_params_user(substream
, arg
);
2687 case SNDRV_PCM_IOCTL_HW_FREE
:
2688 return snd_pcm_hw_free(substream
);
2689 case SNDRV_PCM_IOCTL_SW_PARAMS
:
2690 return snd_pcm_sw_params_user(substream
, arg
);
2691 case SNDRV_PCM_IOCTL_STATUS
:
2692 return snd_pcm_status_user(substream
, arg
);
2693 case SNDRV_PCM_IOCTL_CHANNEL_INFO
:
2694 return snd_pcm_channel_info_user(substream
, arg
);
2695 case SNDRV_PCM_IOCTL_PREPARE
:
2696 return snd_pcm_prepare(substream
, file
);
2697 case SNDRV_PCM_IOCTL_RESET
:
2698 return snd_pcm_reset(substream
);
2699 case SNDRV_PCM_IOCTL_START
:
2700 return snd_pcm_action_lock_irq(&snd_pcm_action_start
, substream
, SNDRV_PCM_STATE_RUNNING
);
2701 case SNDRV_PCM_IOCTL_LINK
:
2702 return snd_pcm_link(substream
, (int)(unsigned long) arg
);
2703 case SNDRV_PCM_IOCTL_UNLINK
:
2704 return snd_pcm_unlink(substream
);
2705 case SNDRV_PCM_IOCTL_RESUME
:
2706 return snd_pcm_resume(substream
);
2707 case SNDRV_PCM_IOCTL_XRUN
:
2708 return snd_pcm_xrun(substream
);
2709 case SNDRV_PCM_IOCTL_HWSYNC
:
2710 return snd_pcm_hwsync(substream
);
2711 case SNDRV_PCM_IOCTL_DELAY
:
2712 return snd_pcm_delay(substream
, arg
);
2713 case SNDRV_PCM_IOCTL_SYNC_PTR
:
2714 return snd_pcm_sync_ptr(substream
, arg
);
2715 #ifdef CONFIG_SND_SUPPORT_OLD_API
2716 case SNDRV_PCM_IOCTL_HW_REFINE_OLD
:
2717 return snd_pcm_hw_refine_old_user(substream
, arg
);
2718 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD
:
2719 return snd_pcm_hw_params_old_user(substream
, arg
);
2721 case SNDRV_PCM_IOCTL_DRAIN
:
2722 return snd_pcm_drain(substream
, file
);
2723 case SNDRV_PCM_IOCTL_DROP
:
2724 return snd_pcm_drop(substream
);
2725 case SNDRV_PCM_IOCTL_PAUSE
:
2728 snd_pcm_stream_lock_irq(substream
);
2729 res
= snd_pcm_pause(substream
, (int)(unsigned long)arg
);
2730 snd_pcm_stream_unlock_irq(substream
);
2734 pcm_dbg(substream
->pcm
, "unknown ioctl = 0x%x\n", cmd
);
2738 static int snd_pcm_playback_ioctl1(struct file
*file
,
2739 struct snd_pcm_substream
*substream
,
2740 unsigned int cmd
, void __user
*arg
)
2742 if (snd_BUG_ON(!substream
))
2744 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
2747 case SNDRV_PCM_IOCTL_WRITEI_FRAMES
:
2749 struct snd_xferi xferi
;
2750 struct snd_xferi __user
*_xferi
= arg
;
2751 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2752 snd_pcm_sframes_t result
;
2753 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2755 if (put_user(0, &_xferi
->result
))
2757 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2759 result
= snd_pcm_lib_write(substream
, xferi
.buf
, xferi
.frames
);
2760 __put_user(result
, &_xferi
->result
);
2761 return result
< 0 ? result
: 0;
2763 case SNDRV_PCM_IOCTL_WRITEN_FRAMES
:
2765 struct snd_xfern xfern
;
2766 struct snd_xfern __user
*_xfern
= arg
;
2767 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2769 snd_pcm_sframes_t result
;
2770 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2772 if (runtime
->channels
> 128)
2774 if (put_user(0, &_xfern
->result
))
2776 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2779 bufs
= memdup_user(xfern
.bufs
,
2780 sizeof(void *) * runtime
->channels
);
2782 return PTR_ERR(bufs
);
2783 result
= snd_pcm_lib_writev(substream
, bufs
, xfern
.frames
);
2785 __put_user(result
, &_xfern
->result
);
2786 return result
< 0 ? result
: 0;
2788 case SNDRV_PCM_IOCTL_REWIND
:
2790 snd_pcm_uframes_t frames
;
2791 snd_pcm_uframes_t __user
*_frames
= arg
;
2792 snd_pcm_sframes_t result
;
2793 if (get_user(frames
, _frames
))
2795 if (put_user(0, _frames
))
2797 result
= snd_pcm_playback_rewind(substream
, frames
);
2798 __put_user(result
, _frames
);
2799 return result
< 0 ? result
: 0;
2801 case SNDRV_PCM_IOCTL_FORWARD
:
2803 snd_pcm_uframes_t frames
;
2804 snd_pcm_uframes_t __user
*_frames
= arg
;
2805 snd_pcm_sframes_t result
;
2806 if (get_user(frames
, _frames
))
2808 if (put_user(0, _frames
))
2810 result
= snd_pcm_playback_forward(substream
, frames
);
2811 __put_user(result
, _frames
);
2812 return result
< 0 ? result
: 0;
2815 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2818 static int snd_pcm_capture_ioctl1(struct file
*file
,
2819 struct snd_pcm_substream
*substream
,
2820 unsigned int cmd
, void __user
*arg
)
2822 if (snd_BUG_ON(!substream
))
2824 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_CAPTURE
))
2827 case SNDRV_PCM_IOCTL_READI_FRAMES
:
2829 struct snd_xferi xferi
;
2830 struct snd_xferi __user
*_xferi
= arg
;
2831 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2832 snd_pcm_sframes_t result
;
2833 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2835 if (put_user(0, &_xferi
->result
))
2837 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2839 result
= snd_pcm_lib_read(substream
, xferi
.buf
, xferi
.frames
);
2840 __put_user(result
, &_xferi
->result
);
2841 return result
< 0 ? result
: 0;
2843 case SNDRV_PCM_IOCTL_READN_FRAMES
:
2845 struct snd_xfern xfern
;
2846 struct snd_xfern __user
*_xfern
= arg
;
2847 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2849 snd_pcm_sframes_t result
;
2850 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2852 if (runtime
->channels
> 128)
2854 if (put_user(0, &_xfern
->result
))
2856 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2859 bufs
= memdup_user(xfern
.bufs
,
2860 sizeof(void *) * runtime
->channels
);
2862 return PTR_ERR(bufs
);
2863 result
= snd_pcm_lib_readv(substream
, bufs
, xfern
.frames
);
2865 __put_user(result
, &_xfern
->result
);
2866 return result
< 0 ? result
: 0;
2868 case SNDRV_PCM_IOCTL_REWIND
:
2870 snd_pcm_uframes_t frames
;
2871 snd_pcm_uframes_t __user
*_frames
= arg
;
2872 snd_pcm_sframes_t result
;
2873 if (get_user(frames
, _frames
))
2875 if (put_user(0, _frames
))
2877 result
= snd_pcm_capture_rewind(substream
, frames
);
2878 __put_user(result
, _frames
);
2879 return result
< 0 ? result
: 0;
2881 case SNDRV_PCM_IOCTL_FORWARD
:
2883 snd_pcm_uframes_t frames
;
2884 snd_pcm_uframes_t __user
*_frames
= arg
;
2885 snd_pcm_sframes_t result
;
2886 if (get_user(frames
, _frames
))
2888 if (put_user(0, _frames
))
2890 result
= snd_pcm_capture_forward(substream
, frames
);
2891 __put_user(result
, _frames
);
2892 return result
< 0 ? result
: 0;
2895 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2898 static long snd_pcm_playback_ioctl(struct file
*file
, unsigned int cmd
,
2901 struct snd_pcm_file
*pcm_file
;
2903 pcm_file
= file
->private_data
;
2905 if (((cmd
>> 8) & 0xff) != 'A')
2908 return snd_pcm_playback_ioctl1(file
, pcm_file
->substream
, cmd
,
2909 (void __user
*)arg
);
2912 static long snd_pcm_capture_ioctl(struct file
*file
, unsigned int cmd
,
2915 struct snd_pcm_file
*pcm_file
;
2917 pcm_file
= file
->private_data
;
2919 if (((cmd
>> 8) & 0xff) != 'A')
2922 return snd_pcm_capture_ioctl1(file
, pcm_file
->substream
, cmd
,
2923 (void __user
*)arg
);
2926 int snd_pcm_kernel_ioctl(struct snd_pcm_substream
*substream
,
2927 unsigned int cmd
, void *arg
)
2932 fs
= snd_enter_user();
2933 switch (substream
->stream
) {
2934 case SNDRV_PCM_STREAM_PLAYBACK
:
2935 result
= snd_pcm_playback_ioctl1(NULL
, substream
, cmd
,
2936 (void __user
*)arg
);
2938 case SNDRV_PCM_STREAM_CAPTURE
:
2939 result
= snd_pcm_capture_ioctl1(NULL
, substream
, cmd
,
2940 (void __user
*)arg
);
2950 EXPORT_SYMBOL(snd_pcm_kernel_ioctl
);
2952 static ssize_t
snd_pcm_read(struct file
*file
, char __user
*buf
, size_t count
,
2955 struct snd_pcm_file
*pcm_file
;
2956 struct snd_pcm_substream
*substream
;
2957 struct snd_pcm_runtime
*runtime
;
2958 snd_pcm_sframes_t result
;
2960 pcm_file
= file
->private_data
;
2961 substream
= pcm_file
->substream
;
2962 if (PCM_RUNTIME_CHECK(substream
))
2964 runtime
= substream
->runtime
;
2965 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2967 if (!frame_aligned(runtime
, count
))
2969 count
= bytes_to_frames(runtime
, count
);
2970 result
= snd_pcm_lib_read(substream
, buf
, count
);
2972 result
= frames_to_bytes(runtime
, result
);
2976 static ssize_t
snd_pcm_write(struct file
*file
, const char __user
*buf
,
2977 size_t count
, loff_t
* offset
)
2979 struct snd_pcm_file
*pcm_file
;
2980 struct snd_pcm_substream
*substream
;
2981 struct snd_pcm_runtime
*runtime
;
2982 snd_pcm_sframes_t result
;
2984 pcm_file
= file
->private_data
;
2985 substream
= pcm_file
->substream
;
2986 if (PCM_RUNTIME_CHECK(substream
))
2988 runtime
= substream
->runtime
;
2989 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2991 if (!frame_aligned(runtime
, count
))
2993 count
= bytes_to_frames(runtime
, count
);
2994 result
= snd_pcm_lib_write(substream
, buf
, count
);
2996 result
= frames_to_bytes(runtime
, result
);
3000 static ssize_t
snd_pcm_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
3001 unsigned long nr_segs
, loff_t pos
)
3004 struct snd_pcm_file
*pcm_file
;
3005 struct snd_pcm_substream
*substream
;
3006 struct snd_pcm_runtime
*runtime
;
3007 snd_pcm_sframes_t result
;
3010 snd_pcm_uframes_t frames
;
3012 pcm_file
= iocb
->ki_filp
->private_data
;
3013 substream
= pcm_file
->substream
;
3014 if (PCM_RUNTIME_CHECK(substream
))
3016 runtime
= substream
->runtime
;
3017 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3019 if (nr_segs
> 1024 || nr_segs
!= runtime
->channels
)
3021 if (!frame_aligned(runtime
, iov
->iov_len
))
3023 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
3024 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
3027 for (i
= 0; i
< nr_segs
; ++i
)
3028 bufs
[i
] = iov
[i
].iov_base
;
3029 result
= snd_pcm_lib_readv(substream
, bufs
, frames
);
3031 result
= frames_to_bytes(runtime
, result
);
3036 static ssize_t
snd_pcm_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
3037 unsigned long nr_segs
, loff_t pos
)
3039 struct snd_pcm_file
*pcm_file
;
3040 struct snd_pcm_substream
*substream
;
3041 struct snd_pcm_runtime
*runtime
;
3042 snd_pcm_sframes_t result
;
3045 snd_pcm_uframes_t frames
;
3047 pcm_file
= iocb
->ki_filp
->private_data
;
3048 substream
= pcm_file
->substream
;
3049 if (PCM_RUNTIME_CHECK(substream
))
3051 runtime
= substream
->runtime
;
3052 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3054 if (nr_segs
> 128 || nr_segs
!= runtime
->channels
||
3055 !frame_aligned(runtime
, iov
->iov_len
))
3057 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
3058 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
3061 for (i
= 0; i
< nr_segs
; ++i
)
3062 bufs
[i
] = iov
[i
].iov_base
;
3063 result
= snd_pcm_lib_writev(substream
, bufs
, frames
);
3065 result
= frames_to_bytes(runtime
, result
);
3070 static unsigned int snd_pcm_playback_poll(struct file
*file
, poll_table
* wait
)
3072 struct snd_pcm_file
*pcm_file
;
3073 struct snd_pcm_substream
*substream
;
3074 struct snd_pcm_runtime
*runtime
;
3076 snd_pcm_uframes_t avail
;
3078 pcm_file
= file
->private_data
;
3080 substream
= pcm_file
->substream
;
3081 if (PCM_RUNTIME_CHECK(substream
))
3083 runtime
= substream
->runtime
;
3085 poll_wait(file
, &runtime
->sleep
, wait
);
3087 snd_pcm_stream_lock_irq(substream
);
3088 avail
= snd_pcm_playback_avail(runtime
);
3089 switch (runtime
->status
->state
) {
3090 case SNDRV_PCM_STATE_RUNNING
:
3091 case SNDRV_PCM_STATE_PREPARED
:
3092 case SNDRV_PCM_STATE_PAUSED
:
3093 if (avail
>= runtime
->control
->avail_min
) {
3094 mask
= POLLOUT
| POLLWRNORM
;
3098 case SNDRV_PCM_STATE_DRAINING
:
3102 mask
= POLLOUT
| POLLWRNORM
| POLLERR
;
3105 snd_pcm_stream_unlock_irq(substream
);
3109 static unsigned int snd_pcm_capture_poll(struct file
*file
, poll_table
* wait
)
3111 struct snd_pcm_file
*pcm_file
;
3112 struct snd_pcm_substream
*substream
;
3113 struct snd_pcm_runtime
*runtime
;
3115 snd_pcm_uframes_t avail
;
3117 pcm_file
= file
->private_data
;
3119 substream
= pcm_file
->substream
;
3120 if (PCM_RUNTIME_CHECK(substream
))
3122 runtime
= substream
->runtime
;
3124 poll_wait(file
, &runtime
->sleep
, wait
);
3126 snd_pcm_stream_lock_irq(substream
);
3127 avail
= snd_pcm_capture_avail(runtime
);
3128 switch (runtime
->status
->state
) {
3129 case SNDRV_PCM_STATE_RUNNING
:
3130 case SNDRV_PCM_STATE_PREPARED
:
3131 case SNDRV_PCM_STATE_PAUSED
:
3132 if (avail
>= runtime
->control
->avail_min
) {
3133 mask
= POLLIN
| POLLRDNORM
;
3138 case SNDRV_PCM_STATE_DRAINING
:
3140 mask
= POLLIN
| POLLRDNORM
;
3145 mask
= POLLIN
| POLLRDNORM
| POLLERR
;
3148 snd_pcm_stream_unlock_irq(substream
);
3157 * Only on coherent architectures, we can mmap the status and the control records
3158 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3160 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3162 * mmap status record
3164 static int snd_pcm_mmap_status_fault(struct vm_area_struct
*area
,
3165 struct vm_fault
*vmf
)
3167 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3168 struct snd_pcm_runtime
*runtime
;
3170 if (substream
== NULL
)
3171 return VM_FAULT_SIGBUS
;
3172 runtime
= substream
->runtime
;
3173 vmf
->page
= virt_to_page(runtime
->status
);
3174 get_page(vmf
->page
);
3178 static const struct vm_operations_struct snd_pcm_vm_ops_status
=
3180 .fault
= snd_pcm_mmap_status_fault
,
3183 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3184 struct vm_area_struct
*area
)
3187 if (!(area
->vm_flags
& VM_READ
))
3189 size
= area
->vm_end
- area
->vm_start
;
3190 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)))
3192 area
->vm_ops
= &snd_pcm_vm_ops_status
;
3193 area
->vm_private_data
= substream
;
3194 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3199 * mmap control record
3201 static int snd_pcm_mmap_control_fault(struct vm_area_struct
*area
,
3202 struct vm_fault
*vmf
)
3204 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3205 struct snd_pcm_runtime
*runtime
;
3207 if (substream
== NULL
)
3208 return VM_FAULT_SIGBUS
;
3209 runtime
= substream
->runtime
;
3210 vmf
->page
= virt_to_page(runtime
->control
);
3211 get_page(vmf
->page
);
3215 static const struct vm_operations_struct snd_pcm_vm_ops_control
=
3217 .fault
= snd_pcm_mmap_control_fault
,
3220 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3221 struct vm_area_struct
*area
)
3224 if (!(area
->vm_flags
& VM_READ
))
3226 size
= area
->vm_end
- area
->vm_start
;
3227 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
)))
3229 area
->vm_ops
= &snd_pcm_vm_ops_control
;
3230 area
->vm_private_data
= substream
;
3231 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3234 #else /* ! coherent mmap */
3236 * don't support mmap for status and control records.
3238 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3239 struct vm_area_struct
*area
)
3243 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3244 struct vm_area_struct
*area
)
3248 #endif /* coherent mmap */
3250 static inline struct page
*
3251 snd_pcm_default_page_ops(struct snd_pcm_substream
*substream
, unsigned long ofs
)
3253 void *vaddr
= substream
->runtime
->dma_area
+ ofs
;
3254 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3255 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3256 return virt_to_page(CAC_ADDR(vaddr
));
3258 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3259 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
) {
3260 dma_addr_t addr
= substream
->runtime
->dma_addr
+ ofs
;
3261 addr
-= get_dma_offset(substream
->dma_buffer
.dev
.dev
);
3262 /* assume dma_handle set via pfn_to_phys() in
3263 * mm/dma-noncoherent.c
3265 return pfn_to_page(addr
>> PAGE_SHIFT
);
3268 return virt_to_page(vaddr
);
3272 * fault callback for mmapping a RAM page
3274 static int snd_pcm_mmap_data_fault(struct vm_area_struct
*area
,
3275 struct vm_fault
*vmf
)
3277 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3278 struct snd_pcm_runtime
*runtime
;
3279 unsigned long offset
;
3283 if (substream
== NULL
)
3284 return VM_FAULT_SIGBUS
;
3285 runtime
= substream
->runtime
;
3286 offset
= vmf
->pgoff
<< PAGE_SHIFT
;
3287 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3288 if (offset
> dma_bytes
- PAGE_SIZE
)
3289 return VM_FAULT_SIGBUS
;
3290 if (substream
->ops
->page
)
3291 page
= substream
->ops
->page(substream
, offset
);
3293 page
= snd_pcm_default_page_ops(substream
, offset
);
3295 return VM_FAULT_SIGBUS
;
3301 static const struct vm_operations_struct snd_pcm_vm_ops_data
= {
3302 .open
= snd_pcm_mmap_data_open
,
3303 .close
= snd_pcm_mmap_data_close
,
3306 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault
= {
3307 .open
= snd_pcm_mmap_data_open
,
3308 .close
= snd_pcm_mmap_data_close
,
3309 .fault
= snd_pcm_mmap_data_fault
,
3312 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3313 /* This should be defined / handled globally! */
3315 #define ARCH_HAS_DMA_MMAP_COHERENT
3320 * mmap the DMA buffer on RAM
3322 int snd_pcm_lib_default_mmap(struct snd_pcm_substream
*substream
,
3323 struct vm_area_struct
*area
)
3325 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3326 #ifdef CONFIG_GENERIC_ALLOCATOR
3327 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV_IRAM
) {
3328 area
->vm_page_prot
= pgprot_writecombine(area
->vm_page_prot
);
3329 return remap_pfn_range(area
, area
->vm_start
,
3330 substream
->dma_buffer
.addr
>> PAGE_SHIFT
,
3331 area
->vm_end
- area
->vm_start
, area
->vm_page_prot
);
3333 #endif /* CONFIG_GENERIC_ALLOCATOR */
3334 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3335 if (!substream
->ops
->page
&&
3336 substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3337 return dma_mmap_coherent(substream
->dma_buffer
.dev
.dev
,
3339 substream
->runtime
->dma_area
,
3340 substream
->runtime
->dma_addr
,
3341 area
->vm_end
- area
->vm_start
);
3342 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3343 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
&&
3344 !plat_device_is_coherent(substream
->dma_buffer
.dev
.dev
))
3345 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3346 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3347 /* mmap with fault handler */
3348 area
->vm_ops
= &snd_pcm_vm_ops_data_fault
;
3351 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap
);
3354 * mmap the DMA buffer on I/O memory area
3356 #if SNDRV_PCM_INFO_MMAP_IOMEM
3357 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream
*substream
,
3358 struct vm_area_struct
*area
)
3360 struct snd_pcm_runtime
*runtime
= substream
->runtime
;;
3362 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3363 return vm_iomap_memory(area
, runtime
->dma_addr
, runtime
->dma_bytes
);
3366 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem
);
3367 #endif /* SNDRV_PCM_INFO_MMAP */
3372 int snd_pcm_mmap_data(struct snd_pcm_substream
*substream
, struct file
*file
,
3373 struct vm_area_struct
*area
)
3375 struct snd_pcm_runtime
*runtime
;
3377 unsigned long offset
;
3381 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
3382 if (!(area
->vm_flags
& (VM_WRITE
|VM_READ
)))
3385 if (!(area
->vm_flags
& VM_READ
))
3388 runtime
= substream
->runtime
;
3389 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3391 if (!(runtime
->info
& SNDRV_PCM_INFO_MMAP
))
3393 if (runtime
->access
== SNDRV_PCM_ACCESS_RW_INTERLEAVED
||
3394 runtime
->access
== SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
)
3396 size
= area
->vm_end
- area
->vm_start
;
3397 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3398 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3399 if ((size_t)size
> dma_bytes
)
3401 if (offset
> dma_bytes
- size
)
3404 area
->vm_ops
= &snd_pcm_vm_ops_data
;
3405 area
->vm_private_data
= substream
;
3406 if (substream
->ops
->mmap
)
3407 err
= substream
->ops
->mmap(substream
, area
);
3409 err
= snd_pcm_lib_default_mmap(substream
, area
);
3411 atomic_inc(&substream
->mmap_count
);
3415 EXPORT_SYMBOL(snd_pcm_mmap_data
);
3417 static int snd_pcm_mmap(struct file
*file
, struct vm_area_struct
*area
)
3419 struct snd_pcm_file
* pcm_file
;
3420 struct snd_pcm_substream
*substream
;
3421 unsigned long offset
;
3423 pcm_file
= file
->private_data
;
3424 substream
= pcm_file
->substream
;
3425 if (PCM_RUNTIME_CHECK(substream
))
3428 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3430 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3431 if (pcm_file
->no_compat_mmap
)
3433 return snd_pcm_mmap_status(substream
, file
, area
);
3434 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3435 if (pcm_file
->no_compat_mmap
)
3437 return snd_pcm_mmap_control(substream
, file
, area
);
3439 return snd_pcm_mmap_data(substream
, file
, area
);
3444 static int snd_pcm_fasync(int fd
, struct file
* file
, int on
)
3446 struct snd_pcm_file
* pcm_file
;
3447 struct snd_pcm_substream
*substream
;
3448 struct snd_pcm_runtime
*runtime
;
3450 pcm_file
= file
->private_data
;
3451 substream
= pcm_file
->substream
;
3452 if (PCM_RUNTIME_CHECK(substream
))
3454 runtime
= substream
->runtime
;
3455 return fasync_helper(fd
, file
, on
, &runtime
->fasync
);
3461 #ifdef CONFIG_COMPAT
3462 #include "pcm_compat.c"
3464 #define snd_pcm_ioctl_compat NULL
3468 * To be removed helpers to keep binary compatibility
3471 #ifdef CONFIG_SND_SUPPORT_OLD_API
3472 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3473 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3475 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params
*params
,
3476 struct snd_pcm_hw_params_old
*oparams
)
3480 memset(params
, 0, sizeof(*params
));
3481 params
->flags
= oparams
->flags
;
3482 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3483 params
->masks
[i
].bits
[0] = oparams
->masks
[i
];
3484 memcpy(params
->intervals
, oparams
->intervals
, sizeof(oparams
->intervals
));
3485 params
->rmask
= __OLD_TO_NEW_MASK(oparams
->rmask
);
3486 params
->cmask
= __OLD_TO_NEW_MASK(oparams
->cmask
);
3487 params
->info
= oparams
->info
;
3488 params
->msbits
= oparams
->msbits
;
3489 params
->rate_num
= oparams
->rate_num
;
3490 params
->rate_den
= oparams
->rate_den
;
3491 params
->fifo_size
= oparams
->fifo_size
;
3494 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old
*oparams
,
3495 struct snd_pcm_hw_params
*params
)
3499 memset(oparams
, 0, sizeof(*oparams
));
3500 oparams
->flags
= params
->flags
;
3501 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3502 oparams
->masks
[i
] = params
->masks
[i
].bits
[0];
3503 memcpy(oparams
->intervals
, params
->intervals
, sizeof(oparams
->intervals
));
3504 oparams
->rmask
= __NEW_TO_OLD_MASK(params
->rmask
);
3505 oparams
->cmask
= __NEW_TO_OLD_MASK(params
->cmask
);
3506 oparams
->info
= params
->info
;
3507 oparams
->msbits
= params
->msbits
;
3508 oparams
->rate_num
= params
->rate_num
;
3509 oparams
->rate_den
= params
->rate_den
;
3510 oparams
->fifo_size
= params
->fifo_size
;
3513 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
3514 struct snd_pcm_hw_params_old __user
* _oparams
)
3516 struct snd_pcm_hw_params
*params
;
3517 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3520 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3524 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3525 if (IS_ERR(oparams
)) {
3526 err
= PTR_ERR(oparams
);
3529 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3530 err
= snd_pcm_hw_refine(substream
, params
);
3531 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3532 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3543 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
3544 struct snd_pcm_hw_params_old __user
* _oparams
)
3546 struct snd_pcm_hw_params
*params
;
3547 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3550 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3554 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3555 if (IS_ERR(oparams
)) {
3556 err
= PTR_ERR(oparams
);
3559 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3560 err
= snd_pcm_hw_params(substream
, params
);
3561 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3562 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3572 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3575 static unsigned long snd_pcm_get_unmapped_area(struct file
*file
,
3578 unsigned long pgoff
,
3579 unsigned long flags
)
3581 struct snd_pcm_file
*pcm_file
= file
->private_data
;
3582 struct snd_pcm_substream
*substream
= pcm_file
->substream
;
3583 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
3584 unsigned long offset
= pgoff
<< PAGE_SHIFT
;
3587 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3588 return (unsigned long)runtime
->status
;
3589 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3590 return (unsigned long)runtime
->control
;
3592 return (unsigned long)runtime
->dma_area
+ offset
;
3596 # define snd_pcm_get_unmapped_area NULL
3603 const struct file_operations snd_pcm_f_ops
[2] = {
3605 .owner
= THIS_MODULE
,
3606 .write
= snd_pcm_write
,
3607 .aio_write
= snd_pcm_aio_write
,
3608 .open
= snd_pcm_playback_open
,
3609 .release
= snd_pcm_release
,
3610 .llseek
= no_llseek
,
3611 .poll
= snd_pcm_playback_poll
,
3612 .unlocked_ioctl
= snd_pcm_playback_ioctl
,
3613 .compat_ioctl
= snd_pcm_ioctl_compat
,
3614 .mmap
= snd_pcm_mmap
,
3615 .fasync
= snd_pcm_fasync
,
3616 .get_unmapped_area
= snd_pcm_get_unmapped_area
,
3619 .owner
= THIS_MODULE
,
3620 .read
= snd_pcm_read
,
3621 .aio_read
= snd_pcm_aio_read
,
3622 .open
= snd_pcm_capture_open
,
3623 .release
= snd_pcm_release
,
3624 .llseek
= no_llseek
,
3625 .poll
= snd_pcm_capture_poll
,
3626 .unlocked_ioctl
= snd_pcm_capture_ioctl
,
3627 .compat_ioctl
= snd_pcm_ioctl_compat
,
3628 .mmap
= snd_pcm_mmap
,
3629 .fasync
= snd_pcm_fasync
,
3630 .get_unmapped_area
= snd_pcm_get_unmapped_area
,