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>
43 struct snd_pcm_hw_params_old
{
45 unsigned int masks
[SNDRV_PCM_HW_PARAM_SUBFORMAT
-
46 SNDRV_PCM_HW_PARAM_ACCESS
+ 1];
47 struct snd_interval intervals
[SNDRV_PCM_HW_PARAM_TICK_TIME
-
48 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
+ 1];
53 unsigned int rate_num
;
54 unsigned int rate_den
;
55 snd_pcm_uframes_t fifo_size
;
56 unsigned char reserved
[64];
59 #ifdef CONFIG_SND_SUPPORT_OLD_API
60 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
61 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
63 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
64 struct snd_pcm_hw_params_old __user
* _oparams
);
65 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
66 struct snd_pcm_hw_params_old __user
* _oparams
);
68 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
);
74 static DEFINE_RWLOCK(snd_pcm_link_rwlock
);
75 static DECLARE_RWSEM(snd_pcm_link_rwsem
);
78 * snd_pcm_stream_lock - Lock the PCM stream
79 * @substream: PCM substream
81 * This locks the PCM stream's spinlock or mutex depending on the nonatomic
82 * flag of the given substream. This also takes the global link rw lock
83 * (or rw sem), too, for avoiding the race with linked streams.
85 void snd_pcm_stream_lock(struct snd_pcm_substream
*substream
)
87 if (substream
->pcm
->nonatomic
) {
88 down_read(&snd_pcm_link_rwsem
);
89 mutex_lock(&substream
->self_group
.mutex
);
91 read_lock(&snd_pcm_link_rwlock
);
92 spin_lock(&substream
->self_group
.lock
);
95 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock
);
98 * snd_pcm_stream_lock - Unlock the PCM stream
99 * @substream: PCM substream
101 * This unlocks the PCM stream that has been locked via snd_pcm_stream_lock().
103 void snd_pcm_stream_unlock(struct snd_pcm_substream
*substream
)
105 if (substream
->pcm
->nonatomic
) {
106 mutex_unlock(&substream
->self_group
.mutex
);
107 up_read(&snd_pcm_link_rwsem
);
109 spin_unlock(&substream
->self_group
.lock
);
110 read_unlock(&snd_pcm_link_rwlock
);
113 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock
);
116 * snd_pcm_stream_lock_irq - Lock the PCM stream
117 * @substream: PCM substream
119 * This locks the PCM stream like snd_pcm_stream_lock() and disables the local
120 * IRQ (only when nonatomic is false). In nonatomic case, this is identical
121 * as snd_pcm_stream_lock().
123 void snd_pcm_stream_lock_irq(struct snd_pcm_substream
*substream
)
125 if (!substream
->pcm
->nonatomic
)
127 snd_pcm_stream_lock(substream
);
129 EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq
);
132 * snd_pcm_stream_unlock_irq - Unlock the PCM stream
133 * @substream: PCM substream
135 * This is a counter-part of snd_pcm_stream_lock_irq().
137 void snd_pcm_stream_unlock_irq(struct snd_pcm_substream
*substream
)
139 snd_pcm_stream_unlock(substream
);
140 if (!substream
->pcm
->nonatomic
)
143 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq
);
145 unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream
*substream
)
147 unsigned long flags
= 0;
148 if (!substream
->pcm
->nonatomic
)
149 local_irq_save(flags
);
150 snd_pcm_stream_lock(substream
);
153 EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave
);
156 * snd_pcm_stream_unlock_irqrestore - Unlock the PCM stream
157 * @substream: PCM substream
160 * This is a counter-part of snd_pcm_stream_lock_irqsave().
162 void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream
*substream
,
165 snd_pcm_stream_unlock(substream
);
166 if (!substream
->pcm
->nonatomic
)
167 local_irq_restore(flags
);
169 EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore
);
171 static inline mm_segment_t
snd_enter_user(void)
173 mm_segment_t fs
= get_fs();
178 static inline void snd_leave_user(mm_segment_t fs
)
185 int snd_pcm_info(struct snd_pcm_substream
*substream
, struct snd_pcm_info
*info
)
187 struct snd_pcm_runtime
*runtime
;
188 struct snd_pcm
*pcm
= substream
->pcm
;
189 struct snd_pcm_str
*pstr
= substream
->pstr
;
191 memset(info
, 0, sizeof(*info
));
192 info
->card
= pcm
->card
->number
;
193 info
->device
= pcm
->device
;
194 info
->stream
= substream
->stream
;
195 info
->subdevice
= substream
->number
;
196 strlcpy(info
->id
, pcm
->id
, sizeof(info
->id
));
197 strlcpy(info
->name
, pcm
->name
, sizeof(info
->name
));
198 info
->dev_class
= pcm
->dev_class
;
199 info
->dev_subclass
= pcm
->dev_subclass
;
200 info
->subdevices_count
= pstr
->substream_count
;
201 info
->subdevices_avail
= pstr
->substream_count
- pstr
->substream_opened
;
202 strlcpy(info
->subname
, substream
->name
, sizeof(info
->subname
));
203 runtime
= substream
->runtime
;
204 /* AB: FIXME!!! This is definitely nonsense */
206 info
->sync
= runtime
->sync
;
207 substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_INFO
, info
);
212 int snd_pcm_info_user(struct snd_pcm_substream
*substream
,
213 struct snd_pcm_info __user
* _info
)
215 struct snd_pcm_info
*info
;
218 info
= kmalloc(sizeof(*info
), GFP_KERNEL
);
221 err
= snd_pcm_info(substream
, info
);
223 if (copy_to_user(_info
, info
, sizeof(*info
)))
230 static bool hw_support_mmap(struct snd_pcm_substream
*substream
)
232 if (!(substream
->runtime
->hw
.info
& SNDRV_PCM_INFO_MMAP
))
234 /* check architectures that return -EINVAL from dma_mmap_coherent() */
235 /* FIXME: this should be some global flag */
236 #if defined(CONFIG_C6X) || defined(CONFIG_FRV) || defined(CONFIG_MN10300) ||\
237 defined(CONFIG_PARISC) || defined(CONFIG_XTENSA)
238 if (!substream
->ops
->mmap
&&
239 substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
248 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
249 static const char * const snd_pcm_hw_param_names
[] = {
253 HW_PARAM(SAMPLE_BITS
),
254 HW_PARAM(FRAME_BITS
),
257 HW_PARAM(PERIOD_TIME
),
258 HW_PARAM(PERIOD_SIZE
),
259 HW_PARAM(PERIOD_BYTES
),
261 HW_PARAM(BUFFER_TIME
),
262 HW_PARAM(BUFFER_SIZE
),
263 HW_PARAM(BUFFER_BYTES
),
268 int snd_pcm_hw_refine(struct snd_pcm_substream
*substream
,
269 struct snd_pcm_hw_params
*params
)
272 struct snd_pcm_hardware
*hw
;
273 struct snd_interval
*i
= NULL
;
274 struct snd_mask
*m
= NULL
;
275 struct snd_pcm_hw_constraints
*constrs
= &substream
->runtime
->hw_constraints
;
276 unsigned int rstamps
[constrs
->rules_num
];
277 unsigned int vstamps
[SNDRV_PCM_HW_PARAM_LAST_INTERVAL
+ 1];
278 unsigned int stamp
= 2;
282 params
->fifo_size
= 0;
283 if (params
->rmask
& (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS
))
285 if (params
->rmask
& (1 << SNDRV_PCM_HW_PARAM_RATE
)) {
286 params
->rate_num
= 0;
287 params
->rate_den
= 0;
290 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
291 m
= hw_param_mask(params
, k
);
292 if (snd_mask_empty(m
))
294 if (!(params
->rmask
& (1 << k
)))
297 pr_debug("%s = ", snd_pcm_hw_param_names
[k
]);
298 pr_cont("%04x%04x%04x%04x -> ", m
->bits
[3], m
->bits
[2], m
->bits
[1], m
->bits
[0]);
300 changed
= snd_mask_refine(m
, constrs_mask(constrs
, k
));
302 pr_cont("%04x%04x%04x%04x\n", m
->bits
[3], m
->bits
[2], m
->bits
[1], m
->bits
[0]);
305 params
->cmask
|= 1 << k
;
310 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
311 i
= hw_param_interval(params
, k
);
312 if (snd_interval_empty(i
))
314 if (!(params
->rmask
& (1 << k
)))
317 pr_debug("%s = ", snd_pcm_hw_param_names
[k
]);
322 i
->openmin
? '(' : '[', i
->min
,
323 i
->max
, i
->openmax
? ')' : ']');
326 changed
= snd_interval_refine(i
, constrs_interval(constrs
, k
));
331 pr_cont("%c%u %u%c\n",
332 i
->openmin
? '(' : '[', i
->min
,
333 i
->max
, i
->openmax
? ')' : ']');
336 params
->cmask
|= 1 << k
;
341 for (k
= 0; k
< constrs
->rules_num
; k
++)
343 for (k
= 0; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++)
344 vstamps
[k
] = (params
->rmask
& (1 << k
)) ? 1 : 0;
347 for (k
= 0; k
< constrs
->rules_num
; k
++) {
348 struct snd_pcm_hw_rule
*r
= &constrs
->rules
[k
];
351 if (r
->cond
&& !(r
->cond
& params
->flags
))
353 for (d
= 0; r
->deps
[d
] >= 0; d
++) {
354 if (vstamps
[r
->deps
[d
]] > rstamps
[k
]) {
362 pr_debug("Rule %d [%p]: ", k
, r
->func
);
364 pr_cont("%s = ", snd_pcm_hw_param_names
[r
->var
]);
365 if (hw_is_mask(r
->var
)) {
366 m
= hw_param_mask(params
, r
->var
);
367 pr_cont("%x", *m
->bits
);
369 i
= hw_param_interval(params
, r
->var
);
374 i
->openmin
? '(' : '[', i
->min
,
375 i
->max
, i
->openmax
? ')' : ']');
379 changed
= r
->func(params
, r
);
383 if (hw_is_mask(r
->var
))
384 pr_cont("%x", *m
->bits
);
390 i
->openmin
? '(' : '[', i
->min
,
391 i
->max
, i
->openmax
? ')' : ']');
397 if (changed
&& r
->var
>= 0) {
398 params
->cmask
|= (1 << r
->var
);
399 vstamps
[r
->var
] = stamp
;
407 if (!params
->msbits
) {
408 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
);
409 if (snd_interval_single(i
))
410 params
->msbits
= snd_interval_value(i
);
413 if (!params
->rate_den
) {
414 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_RATE
);
415 if (snd_interval_single(i
)) {
416 params
->rate_num
= snd_interval_value(i
);
417 params
->rate_den
= 1;
421 hw
= &substream
->runtime
->hw
;
423 params
->info
= hw
->info
& ~SNDRV_PCM_INFO_FIFO_IN_FRAMES
;
424 if (!hw_support_mmap(substream
))
425 params
->info
&= ~(SNDRV_PCM_INFO_MMAP
|
426 SNDRV_PCM_INFO_MMAP_VALID
);
428 if (!params
->fifo_size
) {
429 m
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
430 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
431 if (snd_mask_min(m
) == snd_mask_max(m
) &&
432 snd_interval_min(i
) == snd_interval_max(i
)) {
433 changed
= substream
->ops
->ioctl(substream
,
434 SNDRV_PCM_IOCTL1_FIFO_SIZE
, params
);
443 EXPORT_SYMBOL(snd_pcm_hw_refine
);
445 static int snd_pcm_hw_refine_user(struct snd_pcm_substream
*substream
,
446 struct snd_pcm_hw_params __user
* _params
)
448 struct snd_pcm_hw_params
*params
;
451 params
= memdup_user(_params
, sizeof(*params
));
453 return PTR_ERR(params
);
455 err
= snd_pcm_hw_refine(substream
, params
);
456 if (copy_to_user(_params
, params
, sizeof(*params
))) {
465 static int period_to_usecs(struct snd_pcm_runtime
*runtime
)
470 return -1; /* invalid */
472 /* take 75% of period time as the deadline */
473 usecs
= (750000 / runtime
->rate
) * runtime
->period_size
;
474 usecs
+= ((750000 % runtime
->rate
) * runtime
->period_size
) /
480 static void snd_pcm_set_state(struct snd_pcm_substream
*substream
, int state
)
482 snd_pcm_stream_lock_irq(substream
);
483 if (substream
->runtime
->status
->state
!= SNDRV_PCM_STATE_DISCONNECTED
)
484 substream
->runtime
->status
->state
= state
;
485 snd_pcm_stream_unlock_irq(substream
);
488 static int snd_pcm_hw_params(struct snd_pcm_substream
*substream
,
489 struct snd_pcm_hw_params
*params
)
491 struct snd_pcm_runtime
*runtime
;
494 snd_pcm_uframes_t frames
;
496 if (PCM_RUNTIME_CHECK(substream
))
498 runtime
= substream
->runtime
;
499 snd_pcm_stream_lock_irq(substream
);
500 switch (runtime
->status
->state
) {
501 case SNDRV_PCM_STATE_OPEN
:
502 case SNDRV_PCM_STATE_SETUP
:
503 case SNDRV_PCM_STATE_PREPARED
:
506 snd_pcm_stream_unlock_irq(substream
);
509 snd_pcm_stream_unlock_irq(substream
);
510 #if IS_ENABLED(CONFIG_SND_PCM_OSS)
511 if (!substream
->oss
.oss
)
513 if (atomic_read(&substream
->mmap_count
))
517 err
= snd_pcm_hw_refine(substream
, params
);
521 err
= snd_pcm_hw_params_choose(substream
, params
);
525 if (substream
->ops
->hw_params
!= NULL
) {
526 err
= substream
->ops
->hw_params(substream
, params
);
531 runtime
->access
= params_access(params
);
532 runtime
->format
= params_format(params
);
533 runtime
->subformat
= params_subformat(params
);
534 runtime
->channels
= params_channels(params
);
535 runtime
->rate
= params_rate(params
);
536 runtime
->period_size
= params_period_size(params
);
537 runtime
->periods
= params_periods(params
);
538 runtime
->buffer_size
= params_buffer_size(params
);
539 runtime
->info
= params
->info
;
540 runtime
->rate_num
= params
->rate_num
;
541 runtime
->rate_den
= params
->rate_den
;
542 runtime
->no_period_wakeup
=
543 (params
->info
& SNDRV_PCM_INFO_NO_PERIOD_WAKEUP
) &&
544 (params
->flags
& SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP
);
546 bits
= snd_pcm_format_physical_width(runtime
->format
);
547 runtime
->sample_bits
= bits
;
548 bits
*= runtime
->channels
;
549 runtime
->frame_bits
= bits
;
551 while (bits
% 8 != 0) {
555 runtime
->byte_align
= bits
/ 8;
556 runtime
->min_align
= frames
;
558 /* Default sw params */
559 runtime
->tstamp_mode
= SNDRV_PCM_TSTAMP_NONE
;
560 runtime
->period_step
= 1;
561 runtime
->control
->avail_min
= runtime
->period_size
;
562 runtime
->start_threshold
= 1;
563 runtime
->stop_threshold
= runtime
->buffer_size
;
564 runtime
->silence_threshold
= 0;
565 runtime
->silence_size
= 0;
566 runtime
->boundary
= runtime
->buffer_size
;
567 while (runtime
->boundary
* 2 <= LONG_MAX
- runtime
->buffer_size
)
568 runtime
->boundary
*= 2;
570 snd_pcm_timer_resolution_change(substream
);
571 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_SETUP
);
573 if (pm_qos_request_active(&substream
->latency_pm_qos_req
))
574 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
575 if ((usecs
= period_to_usecs(runtime
)) >= 0)
576 pm_qos_add_request(&substream
->latency_pm_qos_req
,
577 PM_QOS_CPU_DMA_LATENCY
, usecs
);
580 /* hardware might be unusable from this time,
581 so we force application to retry to set
582 the correct hardware parameter settings */
583 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_OPEN
);
584 if (substream
->ops
->hw_free
!= NULL
)
585 substream
->ops
->hw_free(substream
);
589 static int snd_pcm_hw_params_user(struct snd_pcm_substream
*substream
,
590 struct snd_pcm_hw_params __user
* _params
)
592 struct snd_pcm_hw_params
*params
;
595 params
= memdup_user(_params
, sizeof(*params
));
597 return PTR_ERR(params
);
599 err
= snd_pcm_hw_params(substream
, params
);
600 if (copy_to_user(_params
, params
, sizeof(*params
))) {
609 static int snd_pcm_hw_free(struct snd_pcm_substream
*substream
)
611 struct snd_pcm_runtime
*runtime
;
614 if (PCM_RUNTIME_CHECK(substream
))
616 runtime
= substream
->runtime
;
617 snd_pcm_stream_lock_irq(substream
);
618 switch (runtime
->status
->state
) {
619 case SNDRV_PCM_STATE_SETUP
:
620 case SNDRV_PCM_STATE_PREPARED
:
623 snd_pcm_stream_unlock_irq(substream
);
626 snd_pcm_stream_unlock_irq(substream
);
627 if (atomic_read(&substream
->mmap_count
))
629 if (substream
->ops
->hw_free
)
630 result
= substream
->ops
->hw_free(substream
);
631 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_OPEN
);
632 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
636 static int snd_pcm_sw_params(struct snd_pcm_substream
*substream
,
637 struct snd_pcm_sw_params
*params
)
639 struct snd_pcm_runtime
*runtime
;
642 if (PCM_RUNTIME_CHECK(substream
))
644 runtime
= substream
->runtime
;
645 snd_pcm_stream_lock_irq(substream
);
646 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
647 snd_pcm_stream_unlock_irq(substream
);
650 snd_pcm_stream_unlock_irq(substream
);
652 if (params
->tstamp_mode
> SNDRV_PCM_TSTAMP_LAST
)
654 if (params
->proto
>= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
655 params
->tstamp_type
> SNDRV_PCM_TSTAMP_TYPE_LAST
)
657 if (params
->avail_min
== 0)
659 if (params
->silence_size
>= runtime
->boundary
) {
660 if (params
->silence_threshold
!= 0)
663 if (params
->silence_size
> params
->silence_threshold
)
665 if (params
->silence_threshold
> runtime
->buffer_size
)
669 snd_pcm_stream_lock_irq(substream
);
670 runtime
->tstamp_mode
= params
->tstamp_mode
;
671 if (params
->proto
>= SNDRV_PROTOCOL_VERSION(2, 0, 12))
672 runtime
->tstamp_type
= params
->tstamp_type
;
673 runtime
->period_step
= params
->period_step
;
674 runtime
->control
->avail_min
= params
->avail_min
;
675 runtime
->start_threshold
= params
->start_threshold
;
676 runtime
->stop_threshold
= params
->stop_threshold
;
677 runtime
->silence_threshold
= params
->silence_threshold
;
678 runtime
->silence_size
= params
->silence_size
;
679 params
->boundary
= runtime
->boundary
;
680 if (snd_pcm_running(substream
)) {
681 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
682 runtime
->silence_size
> 0)
683 snd_pcm_playback_silence(substream
, ULONG_MAX
);
684 err
= snd_pcm_update_state(substream
, runtime
);
686 snd_pcm_stream_unlock_irq(substream
);
690 static int snd_pcm_sw_params_user(struct snd_pcm_substream
*substream
,
691 struct snd_pcm_sw_params __user
* _params
)
693 struct snd_pcm_sw_params params
;
695 if (copy_from_user(¶ms
, _params
, sizeof(params
)))
697 err
= snd_pcm_sw_params(substream
, ¶ms
);
698 if (copy_to_user(_params
, ¶ms
, sizeof(params
)))
703 int snd_pcm_status(struct snd_pcm_substream
*substream
,
704 struct snd_pcm_status
*status
)
706 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
708 snd_pcm_stream_lock_irq(substream
);
709 status
->state
= runtime
->status
->state
;
710 status
->suspended_state
= runtime
->status
->suspended_state
;
711 if (status
->state
== SNDRV_PCM_STATE_OPEN
)
713 status
->trigger_tstamp
= runtime
->trigger_tstamp
;
714 if (snd_pcm_running(substream
)) {
715 snd_pcm_update_hw_ptr(substream
);
716 if (runtime
->tstamp_mode
== SNDRV_PCM_TSTAMP_ENABLE
) {
717 status
->tstamp
= runtime
->status
->tstamp
;
718 status
->audio_tstamp
=
719 runtime
->status
->audio_tstamp
;
723 snd_pcm_gettime(runtime
, &status
->tstamp
);
725 status
->appl_ptr
= runtime
->control
->appl_ptr
;
726 status
->hw_ptr
= runtime
->status
->hw_ptr
;
727 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
728 status
->avail
= snd_pcm_playback_avail(runtime
);
729 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
||
730 runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
731 status
->delay
= runtime
->buffer_size
- status
->avail
;
732 status
->delay
+= runtime
->delay
;
736 status
->avail
= snd_pcm_capture_avail(runtime
);
737 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
)
738 status
->delay
= status
->avail
+ runtime
->delay
;
742 status
->avail_max
= runtime
->avail_max
;
743 status
->overrange
= runtime
->overrange
;
744 runtime
->avail_max
= 0;
745 runtime
->overrange
= 0;
747 snd_pcm_stream_unlock_irq(substream
);
751 static int snd_pcm_status_user(struct snd_pcm_substream
*substream
,
752 struct snd_pcm_status __user
* _status
)
754 struct snd_pcm_status status
;
757 memset(&status
, 0, sizeof(status
));
758 res
= snd_pcm_status(substream
, &status
);
761 if (copy_to_user(_status
, &status
, sizeof(status
)))
766 static int snd_pcm_channel_info(struct snd_pcm_substream
*substream
,
767 struct snd_pcm_channel_info
* info
)
769 struct snd_pcm_runtime
*runtime
;
770 unsigned int channel
;
772 channel
= info
->channel
;
773 runtime
= substream
->runtime
;
774 snd_pcm_stream_lock_irq(substream
);
775 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
776 snd_pcm_stream_unlock_irq(substream
);
779 snd_pcm_stream_unlock_irq(substream
);
780 if (channel
>= runtime
->channels
)
782 memset(info
, 0, sizeof(*info
));
783 info
->channel
= channel
;
784 return substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_CHANNEL_INFO
, info
);
787 static int snd_pcm_channel_info_user(struct snd_pcm_substream
*substream
,
788 struct snd_pcm_channel_info __user
* _info
)
790 struct snd_pcm_channel_info info
;
793 if (copy_from_user(&info
, _info
, sizeof(info
)))
795 res
= snd_pcm_channel_info(substream
, &info
);
798 if (copy_to_user(_info
, &info
, sizeof(info
)))
803 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream
*substream
)
805 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
806 if (runtime
->trigger_master
== NULL
)
808 if (runtime
->trigger_master
== substream
) {
809 snd_pcm_gettime(runtime
, &runtime
->trigger_tstamp
);
811 snd_pcm_trigger_tstamp(runtime
->trigger_master
);
812 runtime
->trigger_tstamp
= runtime
->trigger_master
->runtime
->trigger_tstamp
;
814 runtime
->trigger_master
= NULL
;
818 int (*pre_action
)(struct snd_pcm_substream
*substream
, int state
);
819 int (*do_action
)(struct snd_pcm_substream
*substream
, int state
);
820 void (*undo_action
)(struct snd_pcm_substream
*substream
, int state
);
821 void (*post_action
)(struct snd_pcm_substream
*substream
, int state
);
825 * this functions is core for handling of linked stream
826 * Note: the stream state might be changed also on failure
827 * Note2: call with calling stream lock + link lock
829 static int snd_pcm_action_group(struct action_ops
*ops
,
830 struct snd_pcm_substream
*substream
,
831 int state
, int do_lock
)
833 struct snd_pcm_substream
*s
= NULL
;
834 struct snd_pcm_substream
*s1
;
835 int res
= 0, depth
= 1;
837 snd_pcm_group_for_each_entry(s
, substream
) {
838 if (do_lock
&& s
!= substream
) {
839 if (s
->pcm
->nonatomic
)
840 mutex_lock_nested(&s
->self_group
.mutex
, depth
);
842 spin_lock_nested(&s
->self_group
.lock
, depth
);
845 res
= ops
->pre_action(s
, state
);
849 snd_pcm_group_for_each_entry(s
, substream
) {
850 res
= ops
->do_action(s
, state
);
852 if (ops
->undo_action
) {
853 snd_pcm_group_for_each_entry(s1
, substream
) {
854 if (s1
== s
) /* failed stream */
856 ops
->undo_action(s1
, state
);
859 s
= NULL
; /* unlock all */
863 snd_pcm_group_for_each_entry(s
, substream
) {
864 ops
->post_action(s
, state
);
869 snd_pcm_group_for_each_entry(s1
, substream
) {
870 if (s1
!= substream
) {
871 if (s1
->pcm
->nonatomic
)
872 mutex_unlock(&s1
->self_group
.mutex
);
874 spin_unlock(&s1
->self_group
.lock
);
876 if (s1
== s
) /* end */
884 * Note: call with stream lock
886 static int snd_pcm_action_single(struct action_ops
*ops
,
887 struct snd_pcm_substream
*substream
,
892 res
= ops
->pre_action(substream
, state
);
895 res
= ops
->do_action(substream
, state
);
897 ops
->post_action(substream
, state
);
898 else if (ops
->undo_action
)
899 ops
->undo_action(substream
, state
);
904 * Note: call with stream lock
906 static int snd_pcm_action(struct action_ops
*ops
,
907 struct snd_pcm_substream
*substream
,
912 if (!snd_pcm_stream_linked(substream
))
913 return snd_pcm_action_single(ops
, substream
, state
);
915 if (substream
->pcm
->nonatomic
) {
916 if (!mutex_trylock(&substream
->group
->mutex
)) {
917 mutex_unlock(&substream
->self_group
.mutex
);
918 mutex_lock(&substream
->group
->mutex
);
919 mutex_lock(&substream
->self_group
.mutex
);
921 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
922 mutex_unlock(&substream
->group
->mutex
);
924 if (!spin_trylock(&substream
->group
->lock
)) {
925 spin_unlock(&substream
->self_group
.lock
);
926 spin_lock(&substream
->group
->lock
);
927 spin_lock(&substream
->self_group
.lock
);
929 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
930 spin_unlock(&substream
->group
->lock
);
936 * Note: don't use any locks before
938 static int snd_pcm_action_lock_irq(struct action_ops
*ops
,
939 struct snd_pcm_substream
*substream
,
944 snd_pcm_stream_lock_irq(substream
);
945 res
= snd_pcm_action(ops
, substream
, state
);
946 snd_pcm_stream_unlock_irq(substream
);
952 static int snd_pcm_action_nonatomic(struct action_ops
*ops
,
953 struct snd_pcm_substream
*substream
,
958 down_read(&snd_pcm_link_rwsem
);
959 if (snd_pcm_stream_linked(substream
))
960 res
= snd_pcm_action_group(ops
, substream
, state
, 0);
962 res
= snd_pcm_action_single(ops
, substream
, state
);
963 up_read(&snd_pcm_link_rwsem
);
970 static int snd_pcm_pre_start(struct snd_pcm_substream
*substream
, int state
)
972 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
973 if (runtime
->status
->state
!= SNDRV_PCM_STATE_PREPARED
)
975 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
976 !snd_pcm_playback_data(substream
))
978 runtime
->trigger_master
= substream
;
982 static int snd_pcm_do_start(struct snd_pcm_substream
*substream
, int state
)
984 if (substream
->runtime
->trigger_master
!= substream
)
986 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_START
);
989 static void snd_pcm_undo_start(struct snd_pcm_substream
*substream
, int state
)
991 if (substream
->runtime
->trigger_master
== substream
)
992 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
995 static void snd_pcm_post_start(struct snd_pcm_substream
*substream
, int state
)
997 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
998 snd_pcm_trigger_tstamp(substream
);
999 runtime
->hw_ptr_jiffies
= jiffies
;
1000 runtime
->hw_ptr_buffer_jiffies
= (runtime
->buffer_size
* HZ
) /
1002 runtime
->status
->state
= state
;
1003 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
1004 runtime
->silence_size
> 0)
1005 snd_pcm_playback_silence(substream
, ULONG_MAX
);
1006 if (substream
->timer
)
1007 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTART
,
1008 &runtime
->trigger_tstamp
);
1011 static struct action_ops snd_pcm_action_start
= {
1012 .pre_action
= snd_pcm_pre_start
,
1013 .do_action
= snd_pcm_do_start
,
1014 .undo_action
= snd_pcm_undo_start
,
1015 .post_action
= snd_pcm_post_start
1019 * snd_pcm_start - start all linked streams
1020 * @substream: the PCM substream instance
1022 * Return: Zero if successful, or a negative error code.
1024 int snd_pcm_start(struct snd_pcm_substream
*substream
)
1026 return snd_pcm_action(&snd_pcm_action_start
, substream
,
1027 SNDRV_PCM_STATE_RUNNING
);
1033 static int snd_pcm_pre_stop(struct snd_pcm_substream
*substream
, int state
)
1035 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1036 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1038 runtime
->trigger_master
= substream
;
1042 static int snd_pcm_do_stop(struct snd_pcm_substream
*substream
, int state
)
1044 if (substream
->runtime
->trigger_master
== substream
&&
1045 snd_pcm_running(substream
))
1046 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
1047 return 0; /* unconditonally stop all substreams */
1050 static void snd_pcm_post_stop(struct snd_pcm_substream
*substream
, int state
)
1052 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1053 if (runtime
->status
->state
!= state
) {
1054 snd_pcm_trigger_tstamp(substream
);
1055 runtime
->status
->state
= state
;
1056 if (substream
->timer
)
1057 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTOP
,
1058 &runtime
->trigger_tstamp
);
1060 wake_up(&runtime
->sleep
);
1061 wake_up(&runtime
->tsleep
);
1064 static struct action_ops snd_pcm_action_stop
= {
1065 .pre_action
= snd_pcm_pre_stop
,
1066 .do_action
= snd_pcm_do_stop
,
1067 .post_action
= snd_pcm_post_stop
1071 * snd_pcm_stop - try to stop all running streams in the substream group
1072 * @substream: the PCM substream instance
1073 * @state: PCM state after stopping the stream
1075 * The state of each stream is then changed to the given state unconditionally.
1077 * Return: Zero if successful, or a negative error code.
1079 int snd_pcm_stop(struct snd_pcm_substream
*substream
, snd_pcm_state_t state
)
1081 return snd_pcm_action(&snd_pcm_action_stop
, substream
, state
);
1084 EXPORT_SYMBOL(snd_pcm_stop
);
1087 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
1088 * @substream: the PCM substream
1090 * After stopping, the state is changed to SETUP.
1091 * Unlike snd_pcm_stop(), this affects only the given stream.
1093 * Return: Zero if succesful, or a negative error code.
1095 int snd_pcm_drain_done(struct snd_pcm_substream
*substream
)
1097 return snd_pcm_action_single(&snd_pcm_action_stop
, substream
,
1098 SNDRV_PCM_STATE_SETUP
);
1102 * snd_pcm_stop_xrun - stop the running streams as XRUN
1103 * @substream: the PCM substream instance
1105 * This stops the given running substream (and all linked substreams) as XRUN.
1106 * Unlike snd_pcm_stop(), this function takes the substream lock by itself.
1108 * Return: Zero if successful, or a negative error code.
1110 int snd_pcm_stop_xrun(struct snd_pcm_substream
*substream
)
1112 unsigned long flags
;
1115 snd_pcm_stream_lock_irqsave(substream
, flags
);
1116 if (snd_pcm_running(substream
))
1117 ret
= snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
1118 snd_pcm_stream_unlock_irqrestore(substream
, flags
);
1121 EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun
);
1126 static int snd_pcm_pre_pause(struct snd_pcm_substream
*substream
, int push
)
1128 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1129 if (!(runtime
->info
& SNDRV_PCM_INFO_PAUSE
))
1132 if (runtime
->status
->state
!= SNDRV_PCM_STATE_RUNNING
)
1134 } else if (runtime
->status
->state
!= SNDRV_PCM_STATE_PAUSED
)
1136 runtime
->trigger_master
= substream
;
1140 static int snd_pcm_do_pause(struct snd_pcm_substream
*substream
, int push
)
1142 if (substream
->runtime
->trigger_master
!= substream
)
1144 /* some drivers might use hw_ptr to recover from the pause -
1145 update the hw_ptr now */
1147 snd_pcm_update_hw_ptr(substream
);
1148 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1149 * a delta between the current jiffies, this gives a large enough
1150 * delta, effectively to skip the check once.
1152 substream
->runtime
->hw_ptr_jiffies
= jiffies
- HZ
* 1000;
1153 return substream
->ops
->trigger(substream
,
1154 push
? SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
1155 SNDRV_PCM_TRIGGER_PAUSE_RELEASE
);
1158 static void snd_pcm_undo_pause(struct snd_pcm_substream
*substream
, int push
)
1160 if (substream
->runtime
->trigger_master
== substream
)
1161 substream
->ops
->trigger(substream
,
1162 push
? SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1163 SNDRV_PCM_TRIGGER_PAUSE_PUSH
);
1166 static void snd_pcm_post_pause(struct snd_pcm_substream
*substream
, int push
)
1168 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1169 snd_pcm_trigger_tstamp(substream
);
1171 runtime
->status
->state
= SNDRV_PCM_STATE_PAUSED
;
1172 if (substream
->timer
)
1173 snd_timer_notify(substream
->timer
,
1174 SNDRV_TIMER_EVENT_MPAUSE
,
1175 &runtime
->trigger_tstamp
);
1176 wake_up(&runtime
->sleep
);
1177 wake_up(&runtime
->tsleep
);
1179 runtime
->status
->state
= SNDRV_PCM_STATE_RUNNING
;
1180 if (substream
->timer
)
1181 snd_timer_notify(substream
->timer
,
1182 SNDRV_TIMER_EVENT_MCONTINUE
,
1183 &runtime
->trigger_tstamp
);
1187 static struct action_ops snd_pcm_action_pause
= {
1188 .pre_action
= snd_pcm_pre_pause
,
1189 .do_action
= snd_pcm_do_pause
,
1190 .undo_action
= snd_pcm_undo_pause
,
1191 .post_action
= snd_pcm_post_pause
1195 * Push/release the pause for all linked streams.
1197 static int snd_pcm_pause(struct snd_pcm_substream
*substream
, int push
)
1199 return snd_pcm_action(&snd_pcm_action_pause
, substream
, push
);
1205 static int snd_pcm_pre_suspend(struct snd_pcm_substream
*substream
, int state
)
1207 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1208 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1210 runtime
->trigger_master
= substream
;
1214 static int snd_pcm_do_suspend(struct snd_pcm_substream
*substream
, int state
)
1216 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1217 if (runtime
->trigger_master
!= substream
)
1219 if (! snd_pcm_running(substream
))
1221 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1222 return 0; /* suspend unconditionally */
1225 static void snd_pcm_post_suspend(struct snd_pcm_substream
*substream
, int state
)
1227 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1228 snd_pcm_trigger_tstamp(substream
);
1229 runtime
->status
->suspended_state
= runtime
->status
->state
;
1230 runtime
->status
->state
= SNDRV_PCM_STATE_SUSPENDED
;
1231 if (substream
->timer
)
1232 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSUSPEND
,
1233 &runtime
->trigger_tstamp
);
1234 wake_up(&runtime
->sleep
);
1235 wake_up(&runtime
->tsleep
);
1238 static struct action_ops snd_pcm_action_suspend
= {
1239 .pre_action
= snd_pcm_pre_suspend
,
1240 .do_action
= snd_pcm_do_suspend
,
1241 .post_action
= snd_pcm_post_suspend
1245 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1246 * @substream: the PCM substream
1248 * After this call, all streams are changed to SUSPENDED state.
1250 * Return: Zero if successful (or @substream is %NULL), or a negative error
1253 int snd_pcm_suspend(struct snd_pcm_substream
*substream
)
1256 unsigned long flags
;
1261 snd_pcm_stream_lock_irqsave(substream
, flags
);
1262 err
= snd_pcm_action(&snd_pcm_action_suspend
, substream
, 0);
1263 snd_pcm_stream_unlock_irqrestore(substream
, flags
);
1267 EXPORT_SYMBOL(snd_pcm_suspend
);
1270 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1271 * @pcm: the PCM instance
1273 * After this call, all streams are changed to SUSPENDED state.
1275 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1277 int snd_pcm_suspend_all(struct snd_pcm
*pcm
)
1279 struct snd_pcm_substream
*substream
;
1280 int stream
, err
= 0;
1285 for (stream
= 0; stream
< 2; stream
++) {
1286 for (substream
= pcm
->streams
[stream
].substream
;
1287 substream
; substream
= substream
->next
) {
1288 /* FIXME: the open/close code should lock this as well */
1289 if (substream
->runtime
== NULL
)
1291 err
= snd_pcm_suspend(substream
);
1292 if (err
< 0 && err
!= -EBUSY
)
1299 EXPORT_SYMBOL(snd_pcm_suspend_all
);
1303 static int snd_pcm_pre_resume(struct snd_pcm_substream
*substream
, int state
)
1305 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1306 if (!(runtime
->info
& SNDRV_PCM_INFO_RESUME
))
1308 runtime
->trigger_master
= substream
;
1312 static int snd_pcm_do_resume(struct snd_pcm_substream
*substream
, int state
)
1314 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1315 if (runtime
->trigger_master
!= substream
)
1317 /* DMA not running previously? */
1318 if (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_RUNNING
&&
1319 (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_DRAINING
||
1320 substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
1322 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_RESUME
);
1325 static void snd_pcm_undo_resume(struct snd_pcm_substream
*substream
, int state
)
1327 if (substream
->runtime
->trigger_master
== substream
&&
1328 snd_pcm_running(substream
))
1329 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1332 static void snd_pcm_post_resume(struct snd_pcm_substream
*substream
, int state
)
1334 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1335 snd_pcm_trigger_tstamp(substream
);
1336 runtime
->status
->state
= runtime
->status
->suspended_state
;
1337 if (substream
->timer
)
1338 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MRESUME
,
1339 &runtime
->trigger_tstamp
);
1342 static struct action_ops snd_pcm_action_resume
= {
1343 .pre_action
= snd_pcm_pre_resume
,
1344 .do_action
= snd_pcm_do_resume
,
1345 .undo_action
= snd_pcm_undo_resume
,
1346 .post_action
= snd_pcm_post_resume
1349 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1351 struct snd_card
*card
= substream
->pcm
->card
;
1354 snd_power_lock(card
);
1355 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1356 res
= snd_pcm_action_lock_irq(&snd_pcm_action_resume
, substream
, 0);
1357 snd_power_unlock(card
);
1363 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1368 #endif /* CONFIG_PM */
1373 * Change the RUNNING stream(s) to XRUN state.
1375 static int snd_pcm_xrun(struct snd_pcm_substream
*substream
)
1377 struct snd_card
*card
= substream
->pcm
->card
;
1378 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1381 snd_power_lock(card
);
1382 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1383 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1388 snd_pcm_stream_lock_irq(substream
);
1389 switch (runtime
->status
->state
) {
1390 case SNDRV_PCM_STATE_XRUN
:
1391 result
= 0; /* already there */
1393 case SNDRV_PCM_STATE_RUNNING
:
1394 result
= snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
1399 snd_pcm_stream_unlock_irq(substream
);
1401 snd_power_unlock(card
);
1408 static int snd_pcm_pre_reset(struct snd_pcm_substream
*substream
, int state
)
1410 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1411 switch (runtime
->status
->state
) {
1412 case SNDRV_PCM_STATE_RUNNING
:
1413 case SNDRV_PCM_STATE_PREPARED
:
1414 case SNDRV_PCM_STATE_PAUSED
:
1415 case SNDRV_PCM_STATE_SUSPENDED
:
1422 static int snd_pcm_do_reset(struct snd_pcm_substream
*substream
, int state
)
1424 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1425 int err
= substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_RESET
, NULL
);
1428 runtime
->hw_ptr_base
= 0;
1429 runtime
->hw_ptr_interrupt
= runtime
->status
->hw_ptr
-
1430 runtime
->status
->hw_ptr
% runtime
->period_size
;
1431 runtime
->silence_start
= runtime
->status
->hw_ptr
;
1432 runtime
->silence_filled
= 0;
1436 static void snd_pcm_post_reset(struct snd_pcm_substream
*substream
, int state
)
1438 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1439 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1440 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
1441 runtime
->silence_size
> 0)
1442 snd_pcm_playback_silence(substream
, ULONG_MAX
);
1445 static struct action_ops snd_pcm_action_reset
= {
1446 .pre_action
= snd_pcm_pre_reset
,
1447 .do_action
= snd_pcm_do_reset
,
1448 .post_action
= snd_pcm_post_reset
1451 static int snd_pcm_reset(struct snd_pcm_substream
*substream
)
1453 return snd_pcm_action_nonatomic(&snd_pcm_action_reset
, substream
, 0);
1459 /* we use the second argument for updating f_flags */
1460 static int snd_pcm_pre_prepare(struct snd_pcm_substream
*substream
,
1463 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1464 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1465 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
)
1467 if (snd_pcm_running(substream
))
1469 substream
->f_flags
= f_flags
;
1473 static int snd_pcm_do_prepare(struct snd_pcm_substream
*substream
, int state
)
1476 err
= substream
->ops
->prepare(substream
);
1479 return snd_pcm_do_reset(substream
, 0);
1482 static void snd_pcm_post_prepare(struct snd_pcm_substream
*substream
, int state
)
1484 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1485 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1486 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_PREPARED
);
1489 static struct action_ops snd_pcm_action_prepare
= {
1490 .pre_action
= snd_pcm_pre_prepare
,
1491 .do_action
= snd_pcm_do_prepare
,
1492 .post_action
= snd_pcm_post_prepare
1496 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1497 * @substream: the PCM substream instance
1498 * @file: file to refer f_flags
1500 * Return: Zero if successful, or a negative error code.
1502 static int snd_pcm_prepare(struct snd_pcm_substream
*substream
,
1506 struct snd_card
*card
= substream
->pcm
->card
;
1510 f_flags
= file
->f_flags
;
1512 f_flags
= substream
->f_flags
;
1514 snd_power_lock(card
);
1515 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1516 res
= snd_pcm_action_nonatomic(&snd_pcm_action_prepare
,
1517 substream
, f_flags
);
1518 snd_power_unlock(card
);
1526 static int snd_pcm_pre_drain_init(struct snd_pcm_substream
*substream
, int state
)
1528 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1529 switch (runtime
->status
->state
) {
1530 case SNDRV_PCM_STATE_OPEN
:
1531 case SNDRV_PCM_STATE_DISCONNECTED
:
1532 case SNDRV_PCM_STATE_SUSPENDED
:
1535 runtime
->trigger_master
= substream
;
1539 static int snd_pcm_do_drain_init(struct snd_pcm_substream
*substream
, int state
)
1541 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1542 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
1543 switch (runtime
->status
->state
) {
1544 case SNDRV_PCM_STATE_PREPARED
:
1545 /* start playback stream if possible */
1546 if (! snd_pcm_playback_empty(substream
)) {
1547 snd_pcm_do_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1548 snd_pcm_post_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1551 case SNDRV_PCM_STATE_RUNNING
:
1552 runtime
->status
->state
= SNDRV_PCM_STATE_DRAINING
;
1554 case SNDRV_PCM_STATE_XRUN
:
1555 runtime
->status
->state
= SNDRV_PCM_STATE_SETUP
;
1561 /* stop running stream */
1562 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
) {
1563 int new_state
= snd_pcm_capture_avail(runtime
) > 0 ?
1564 SNDRV_PCM_STATE_DRAINING
: SNDRV_PCM_STATE_SETUP
;
1565 snd_pcm_do_stop(substream
, new_state
);
1566 snd_pcm_post_stop(substream
, new_state
);
1572 static void snd_pcm_post_drain_init(struct snd_pcm_substream
*substream
, int state
)
1576 static struct action_ops snd_pcm_action_drain_init
= {
1577 .pre_action
= snd_pcm_pre_drain_init
,
1578 .do_action
= snd_pcm_do_drain_init
,
1579 .post_action
= snd_pcm_post_drain_init
1582 static int snd_pcm_drop(struct snd_pcm_substream
*substream
);
1585 * Drain the stream(s).
1586 * When the substream is linked, sync until the draining of all playback streams
1588 * After this call, all streams are supposed to be either SETUP or DRAINING
1589 * (capture only) state.
1591 static int snd_pcm_drain(struct snd_pcm_substream
*substream
,
1594 struct snd_card
*card
;
1595 struct snd_pcm_runtime
*runtime
;
1596 struct snd_pcm_substream
*s
;
1601 card
= substream
->pcm
->card
;
1602 runtime
= substream
->runtime
;
1604 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1607 snd_power_lock(card
);
1608 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1609 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1611 snd_power_unlock(card
);
1617 if (file
->f_flags
& O_NONBLOCK
)
1619 } else if (substream
->f_flags
& O_NONBLOCK
)
1622 down_read(&snd_pcm_link_rwsem
);
1623 snd_pcm_stream_lock_irq(substream
);
1625 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1626 snd_pcm_pause(substream
, 0);
1628 /* pre-start/stop - all running streams are changed to DRAINING state */
1629 result
= snd_pcm_action(&snd_pcm_action_drain_init
, substream
, 0);
1632 /* in non-blocking, we don't wait in ioctl but let caller poll */
1640 struct snd_pcm_runtime
*to_check
;
1641 if (signal_pending(current
)) {
1642 result
= -ERESTARTSYS
;
1645 /* find a substream to drain */
1647 snd_pcm_group_for_each_entry(s
, substream
) {
1648 if (s
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
)
1650 runtime
= s
->runtime
;
1651 if (runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
1657 break; /* all drained */
1658 init_waitqueue_entry(&wait
, current
);
1659 add_wait_queue(&to_check
->sleep
, &wait
);
1660 snd_pcm_stream_unlock_irq(substream
);
1661 up_read(&snd_pcm_link_rwsem
);
1662 snd_power_unlock(card
);
1663 if (runtime
->no_period_wakeup
)
1664 tout
= MAX_SCHEDULE_TIMEOUT
;
1667 if (runtime
->rate
) {
1668 long t
= runtime
->period_size
* 2 / runtime
->rate
;
1669 tout
= max(t
, tout
);
1671 tout
= msecs_to_jiffies(tout
* 1000);
1673 tout
= schedule_timeout_interruptible(tout
);
1674 snd_power_lock(card
);
1675 down_read(&snd_pcm_link_rwsem
);
1676 snd_pcm_stream_lock_irq(substream
);
1677 remove_wait_queue(&to_check
->sleep
, &wait
);
1678 if (card
->shutdown
) {
1683 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1686 dev_dbg(substream
->pcm
->card
->dev
,
1687 "playback drain error (DMA or IRQ trouble?)\n");
1688 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1696 snd_pcm_stream_unlock_irq(substream
);
1697 up_read(&snd_pcm_link_rwsem
);
1698 snd_power_unlock(card
);
1706 * Immediately put all linked substreams into SETUP state.
1708 static int snd_pcm_drop(struct snd_pcm_substream
*substream
)
1710 struct snd_pcm_runtime
*runtime
;
1713 if (PCM_RUNTIME_CHECK(substream
))
1715 runtime
= substream
->runtime
;
1717 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1718 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
||
1719 runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1722 snd_pcm_stream_lock_irq(substream
);
1724 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1725 snd_pcm_pause(substream
, 0);
1727 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1728 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1729 snd_pcm_stream_unlock_irq(substream
);
1735 static bool is_pcm_file(struct file
*file
)
1737 struct inode
*inode
= file_inode(file
);
1740 if (!S_ISCHR(inode
->i_mode
) || imajor(inode
) != snd_major
)
1742 minor
= iminor(inode
);
1743 return snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_PLAYBACK
) ||
1744 snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
1750 static int snd_pcm_link(struct snd_pcm_substream
*substream
, int fd
)
1753 struct snd_pcm_file
*pcm_file
;
1754 struct snd_pcm_substream
*substream1
;
1755 struct snd_pcm_group
*group
;
1756 struct fd f
= fdget(fd
);
1760 if (!is_pcm_file(f
.file
)) {
1764 pcm_file
= f
.file
->private_data
;
1765 substream1
= pcm_file
->substream
;
1766 group
= kmalloc(sizeof(*group
), GFP_KERNEL
);
1771 down_write(&snd_pcm_link_rwsem
);
1772 write_lock_irq(&snd_pcm_link_rwlock
);
1773 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1774 substream
->runtime
->status
->state
!= substream1
->runtime
->status
->state
||
1775 substream
->pcm
->nonatomic
!= substream1
->pcm
->nonatomic
) {
1779 if (snd_pcm_stream_linked(substream1
)) {
1783 if (!snd_pcm_stream_linked(substream
)) {
1784 substream
->group
= group
;
1786 spin_lock_init(&substream
->group
->lock
);
1787 mutex_init(&substream
->group
->mutex
);
1788 INIT_LIST_HEAD(&substream
->group
->substreams
);
1789 list_add_tail(&substream
->link_list
, &substream
->group
->substreams
);
1790 substream
->group
->count
= 1;
1792 list_add_tail(&substream1
->link_list
, &substream
->group
->substreams
);
1793 substream
->group
->count
++;
1794 substream1
->group
= substream
->group
;
1796 write_unlock_irq(&snd_pcm_link_rwlock
);
1797 up_write(&snd_pcm_link_rwsem
);
1799 snd_card_unref(substream1
->pcm
->card
);
1806 static void relink_to_local(struct snd_pcm_substream
*substream
)
1808 substream
->group
= &substream
->self_group
;
1809 INIT_LIST_HEAD(&substream
->self_group
.substreams
);
1810 list_add_tail(&substream
->link_list
, &substream
->self_group
.substreams
);
1813 static int snd_pcm_unlink(struct snd_pcm_substream
*substream
)
1815 struct snd_pcm_substream
*s
;
1818 down_write(&snd_pcm_link_rwsem
);
1819 write_lock_irq(&snd_pcm_link_rwlock
);
1820 if (!snd_pcm_stream_linked(substream
)) {
1824 list_del(&substream
->link_list
);
1825 substream
->group
->count
--;
1826 if (substream
->group
->count
== 1) { /* detach the last stream, too */
1827 snd_pcm_group_for_each_entry(s
, substream
) {
1831 kfree(substream
->group
);
1833 relink_to_local(substream
);
1835 write_unlock_irq(&snd_pcm_link_rwlock
);
1836 up_write(&snd_pcm_link_rwsem
);
1843 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params
*params
,
1844 struct snd_pcm_hw_rule
*rule
)
1846 struct snd_interval t
;
1847 snd_interval_mul(hw_param_interval_c(params
, rule
->deps
[0]),
1848 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1849 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1852 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params
*params
,
1853 struct snd_pcm_hw_rule
*rule
)
1855 struct snd_interval t
;
1856 snd_interval_div(hw_param_interval_c(params
, rule
->deps
[0]),
1857 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1858 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1861 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params
*params
,
1862 struct snd_pcm_hw_rule
*rule
)
1864 struct snd_interval t
;
1865 snd_interval_muldivk(hw_param_interval_c(params
, rule
->deps
[0]),
1866 hw_param_interval_c(params
, rule
->deps
[1]),
1867 (unsigned long) rule
->private, &t
);
1868 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1871 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params
*params
,
1872 struct snd_pcm_hw_rule
*rule
)
1874 struct snd_interval t
;
1875 snd_interval_mulkdiv(hw_param_interval_c(params
, rule
->deps
[0]),
1876 (unsigned long) rule
->private,
1877 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1878 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1881 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params
*params
,
1882 struct snd_pcm_hw_rule
*rule
)
1885 struct snd_interval
*i
= hw_param_interval(params
, rule
->deps
[0]);
1887 struct snd_mask
*mask
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1889 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1891 if (! snd_mask_test(mask
, k
))
1893 bits
= snd_pcm_format_physical_width(k
);
1895 continue; /* ignore invalid formats */
1896 if ((unsigned)bits
< i
->min
|| (unsigned)bits
> i
->max
)
1897 snd_mask_reset(&m
, k
);
1899 return snd_mask_refine(mask
, &m
);
1902 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params
*params
,
1903 struct snd_pcm_hw_rule
*rule
)
1905 struct snd_interval t
;
1911 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1913 if (! snd_mask_test(hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
), k
))
1915 bits
= snd_pcm_format_physical_width(k
);
1917 continue; /* ignore invalid formats */
1918 if (t
.min
> (unsigned)bits
)
1920 if (t
.max
< (unsigned)bits
)
1924 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1927 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1928 #error "Change this table"
1931 static unsigned int rates
[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1932 48000, 64000, 88200, 96000, 176400, 192000 };
1934 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates
= {
1935 .count
= ARRAY_SIZE(rates
),
1939 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params
*params
,
1940 struct snd_pcm_hw_rule
*rule
)
1942 struct snd_pcm_hardware
*hw
= rule
->private;
1943 return snd_interval_list(hw_param_interval(params
, rule
->var
),
1944 snd_pcm_known_rates
.count
,
1945 snd_pcm_known_rates
.list
, hw
->rates
);
1948 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params
*params
,
1949 struct snd_pcm_hw_rule
*rule
)
1951 struct snd_interval t
;
1952 struct snd_pcm_substream
*substream
= rule
->private;
1954 t
.max
= substream
->buffer_bytes_max
;
1958 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1961 int snd_pcm_hw_constraints_init(struct snd_pcm_substream
*substream
)
1963 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1964 struct snd_pcm_hw_constraints
*constrs
= &runtime
->hw_constraints
;
1967 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
1968 snd_mask_any(constrs_mask(constrs
, k
));
1971 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
1972 snd_interval_any(constrs_interval(constrs
, k
));
1975 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_CHANNELS
));
1976 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
));
1977 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
));
1978 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
));
1979 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_FRAME_BITS
));
1981 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1982 snd_pcm_hw_rule_format
, NULL
,
1983 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1986 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1987 snd_pcm_hw_rule_sample_bits
, NULL
,
1988 SNDRV_PCM_HW_PARAM_FORMAT
,
1989 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
1992 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
1993 snd_pcm_hw_rule_div
, NULL
,
1994 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
1997 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
1998 snd_pcm_hw_rule_mul
, NULL
,
1999 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
2002 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
2003 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
2004 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
2007 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
2008 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
2009 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, -1);
2012 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
2013 snd_pcm_hw_rule_div
, NULL
,
2014 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
2017 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
2018 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
2019 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
, -1);
2022 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
2023 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
2024 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_BUFFER_TIME
, -1);
2027 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIODS
,
2028 snd_pcm_hw_rule_div
, NULL
,
2029 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
2032 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
2033 snd_pcm_hw_rule_div
, NULL
,
2034 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
2037 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
2038 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
2039 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
2042 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
2043 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
2044 SNDRV_PCM_HW_PARAM_PERIOD_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
2047 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
2048 snd_pcm_hw_rule_mul
, NULL
,
2049 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
2052 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
2053 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
2054 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
2057 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
2058 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
2059 SNDRV_PCM_HW_PARAM_BUFFER_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
2062 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
2063 snd_pcm_hw_rule_muldivk
, (void*) 8,
2064 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
2067 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
2068 snd_pcm_hw_rule_muldivk
, (void*) 8,
2069 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
2072 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
2073 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
2074 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
2077 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME
,
2078 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
2079 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
2085 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream
*substream
)
2087 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2088 struct snd_pcm_hardware
*hw
= &runtime
->hw
;
2090 unsigned int mask
= 0;
2092 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
2093 mask
|= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED
;
2094 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
2095 mask
|= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
;
2096 if (hw_support_mmap(substream
)) {
2097 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
2098 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED
;
2099 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
2100 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED
;
2101 if (hw
->info
& SNDRV_PCM_INFO_COMPLEX
)
2102 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX
;
2104 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_ACCESS
, mask
);
2108 err
= snd_pcm_hw_constraint_mask64(runtime
, SNDRV_PCM_HW_PARAM_FORMAT
, hw
->formats
);
2112 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_SUBFORMAT
, 1 << SNDRV_PCM_SUBFORMAT_STD
);
2116 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_CHANNELS
,
2117 hw
->channels_min
, hw
->channels_max
);
2121 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_RATE
,
2122 hw
->rate_min
, hw
->rate_max
);
2126 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
2127 hw
->period_bytes_min
, hw
->period_bytes_max
);
2131 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIODS
,
2132 hw
->periods_min
, hw
->periods_max
);
2136 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
2137 hw
->period_bytes_min
, hw
->buffer_bytes_max
);
2141 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
2142 snd_pcm_hw_rule_buffer_bytes_max
, substream
,
2143 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, -1);
2148 if (runtime
->dma_bytes
) {
2149 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, 0, runtime
->dma_bytes
);
2154 if (!(hw
->rates
& (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))) {
2155 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
2156 snd_pcm_hw_rule_rate
, hw
,
2157 SNDRV_PCM_HW_PARAM_RATE
, -1);
2162 /* FIXME: this belong to lowlevel */
2163 snd_pcm_hw_constraint_integer(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
);
2168 static void pcm_release_private(struct snd_pcm_substream
*substream
)
2170 snd_pcm_unlink(substream
);
2173 void snd_pcm_release_substream(struct snd_pcm_substream
*substream
)
2175 substream
->ref_count
--;
2176 if (substream
->ref_count
> 0)
2179 snd_pcm_drop(substream
);
2180 if (substream
->hw_opened
) {
2181 if (substream
->ops
->hw_free
!= NULL
)
2182 substream
->ops
->hw_free(substream
);
2183 substream
->ops
->close(substream
);
2184 substream
->hw_opened
= 0;
2186 if (pm_qos_request_active(&substream
->latency_pm_qos_req
))
2187 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
2188 if (substream
->pcm_release
) {
2189 substream
->pcm_release(substream
);
2190 substream
->pcm_release
= NULL
;
2192 snd_pcm_detach_substream(substream
);
2195 EXPORT_SYMBOL(snd_pcm_release_substream
);
2197 int snd_pcm_open_substream(struct snd_pcm
*pcm
, int stream
,
2199 struct snd_pcm_substream
**rsubstream
)
2201 struct snd_pcm_substream
*substream
;
2204 err
= snd_pcm_attach_substream(pcm
, stream
, file
, &substream
);
2207 if (substream
->ref_count
> 1) {
2208 *rsubstream
= substream
;
2212 err
= snd_pcm_hw_constraints_init(substream
);
2214 pcm_dbg(pcm
, "snd_pcm_hw_constraints_init failed\n");
2218 if ((err
= substream
->ops
->open(substream
)) < 0)
2221 substream
->hw_opened
= 1;
2223 err
= snd_pcm_hw_constraints_complete(substream
);
2225 pcm_dbg(pcm
, "snd_pcm_hw_constraints_complete failed\n");
2229 *rsubstream
= substream
;
2233 snd_pcm_release_substream(substream
);
2237 EXPORT_SYMBOL(snd_pcm_open_substream
);
2239 static int snd_pcm_open_file(struct file
*file
,
2240 struct snd_pcm
*pcm
,
2243 struct snd_pcm_file
*pcm_file
;
2244 struct snd_pcm_substream
*substream
;
2247 err
= snd_pcm_open_substream(pcm
, stream
, file
, &substream
);
2251 pcm_file
= kzalloc(sizeof(*pcm_file
), GFP_KERNEL
);
2252 if (pcm_file
== NULL
) {
2253 snd_pcm_release_substream(substream
);
2256 pcm_file
->substream
= substream
;
2257 if (substream
->ref_count
== 1) {
2258 substream
->file
= pcm_file
;
2259 substream
->pcm_release
= pcm_release_private
;
2261 file
->private_data
= pcm_file
;
2266 static int snd_pcm_playback_open(struct inode
*inode
, struct file
*file
)
2268 struct snd_pcm
*pcm
;
2269 int err
= nonseekable_open(inode
, file
);
2272 pcm
= snd_lookup_minor_data(iminor(inode
),
2273 SNDRV_DEVICE_TYPE_PCM_PLAYBACK
);
2274 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_PLAYBACK
);
2276 snd_card_unref(pcm
->card
);
2280 static int snd_pcm_capture_open(struct inode
*inode
, struct file
*file
)
2282 struct snd_pcm
*pcm
;
2283 int err
= nonseekable_open(inode
, file
);
2286 pcm
= snd_lookup_minor_data(iminor(inode
),
2287 SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
2288 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_CAPTURE
);
2290 snd_card_unref(pcm
->card
);
2294 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
)
2303 err
= snd_card_file_add(pcm
->card
, file
);
2306 if (!try_module_get(pcm
->card
->module
)) {
2310 init_waitqueue_entry(&wait
, current
);
2311 add_wait_queue(&pcm
->open_wait
, &wait
);
2312 mutex_lock(&pcm
->open_mutex
);
2314 err
= snd_pcm_open_file(file
, pcm
, stream
);
2317 if (err
== -EAGAIN
) {
2318 if (file
->f_flags
& O_NONBLOCK
) {
2324 set_current_state(TASK_INTERRUPTIBLE
);
2325 mutex_unlock(&pcm
->open_mutex
);
2327 mutex_lock(&pcm
->open_mutex
);
2328 if (pcm
->card
->shutdown
) {
2332 if (signal_pending(current
)) {
2337 remove_wait_queue(&pcm
->open_wait
, &wait
);
2338 mutex_unlock(&pcm
->open_mutex
);
2344 module_put(pcm
->card
->module
);
2346 snd_card_file_remove(pcm
->card
, file
);
2351 static int snd_pcm_release(struct inode
*inode
, struct file
*file
)
2353 struct snd_pcm
*pcm
;
2354 struct snd_pcm_substream
*substream
;
2355 struct snd_pcm_file
*pcm_file
;
2357 pcm_file
= file
->private_data
;
2358 substream
= pcm_file
->substream
;
2359 if (snd_BUG_ON(!substream
))
2361 pcm
= substream
->pcm
;
2362 mutex_lock(&pcm
->open_mutex
);
2363 snd_pcm_release_substream(substream
);
2365 mutex_unlock(&pcm
->open_mutex
);
2366 wake_up(&pcm
->open_wait
);
2367 module_put(pcm
->card
->module
);
2368 snd_card_file_remove(pcm
->card
, file
);
2372 static snd_pcm_sframes_t
snd_pcm_playback_rewind(struct snd_pcm_substream
*substream
,
2373 snd_pcm_uframes_t frames
)
2375 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2376 snd_pcm_sframes_t appl_ptr
;
2377 snd_pcm_sframes_t ret
;
2378 snd_pcm_sframes_t hw_avail
;
2383 snd_pcm_stream_lock_irq(substream
);
2384 switch (runtime
->status
->state
) {
2385 case SNDRV_PCM_STATE_PREPARED
:
2387 case SNDRV_PCM_STATE_DRAINING
:
2388 case SNDRV_PCM_STATE_RUNNING
:
2389 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2392 case SNDRV_PCM_STATE_XRUN
:
2395 case SNDRV_PCM_STATE_SUSPENDED
:
2403 hw_avail
= snd_pcm_playback_hw_avail(runtime
);
2404 if (hw_avail
<= 0) {
2408 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2410 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2412 appl_ptr
+= runtime
->boundary
;
2413 runtime
->control
->appl_ptr
= appl_ptr
;
2416 snd_pcm_stream_unlock_irq(substream
);
2420 static snd_pcm_sframes_t
snd_pcm_capture_rewind(struct snd_pcm_substream
*substream
,
2421 snd_pcm_uframes_t frames
)
2423 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2424 snd_pcm_sframes_t appl_ptr
;
2425 snd_pcm_sframes_t ret
;
2426 snd_pcm_sframes_t hw_avail
;
2431 snd_pcm_stream_lock_irq(substream
);
2432 switch (runtime
->status
->state
) {
2433 case SNDRV_PCM_STATE_PREPARED
:
2434 case SNDRV_PCM_STATE_DRAINING
:
2436 case SNDRV_PCM_STATE_RUNNING
:
2437 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2440 case SNDRV_PCM_STATE_XRUN
:
2443 case SNDRV_PCM_STATE_SUSPENDED
:
2451 hw_avail
= snd_pcm_capture_hw_avail(runtime
);
2452 if (hw_avail
<= 0) {
2456 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2458 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2460 appl_ptr
+= runtime
->boundary
;
2461 runtime
->control
->appl_ptr
= appl_ptr
;
2464 snd_pcm_stream_unlock_irq(substream
);
2468 static snd_pcm_sframes_t
snd_pcm_playback_forward(struct snd_pcm_substream
*substream
,
2469 snd_pcm_uframes_t frames
)
2471 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2472 snd_pcm_sframes_t appl_ptr
;
2473 snd_pcm_sframes_t ret
;
2474 snd_pcm_sframes_t avail
;
2479 snd_pcm_stream_lock_irq(substream
);
2480 switch (runtime
->status
->state
) {
2481 case SNDRV_PCM_STATE_PREPARED
:
2482 case SNDRV_PCM_STATE_PAUSED
:
2484 case SNDRV_PCM_STATE_DRAINING
:
2485 case SNDRV_PCM_STATE_RUNNING
:
2486 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2489 case SNDRV_PCM_STATE_XRUN
:
2492 case SNDRV_PCM_STATE_SUSPENDED
:
2500 avail
= snd_pcm_playback_avail(runtime
);
2505 if (frames
> (snd_pcm_uframes_t
)avail
)
2507 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2508 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2509 appl_ptr
-= runtime
->boundary
;
2510 runtime
->control
->appl_ptr
= appl_ptr
;
2513 snd_pcm_stream_unlock_irq(substream
);
2517 static snd_pcm_sframes_t
snd_pcm_capture_forward(struct snd_pcm_substream
*substream
,
2518 snd_pcm_uframes_t frames
)
2520 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2521 snd_pcm_sframes_t appl_ptr
;
2522 snd_pcm_sframes_t ret
;
2523 snd_pcm_sframes_t avail
;
2528 snd_pcm_stream_lock_irq(substream
);
2529 switch (runtime
->status
->state
) {
2530 case SNDRV_PCM_STATE_PREPARED
:
2531 case SNDRV_PCM_STATE_DRAINING
:
2532 case SNDRV_PCM_STATE_PAUSED
:
2534 case SNDRV_PCM_STATE_RUNNING
:
2535 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2538 case SNDRV_PCM_STATE_XRUN
:
2541 case SNDRV_PCM_STATE_SUSPENDED
:
2549 avail
= snd_pcm_capture_avail(runtime
);
2554 if (frames
> (snd_pcm_uframes_t
)avail
)
2556 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2557 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2558 appl_ptr
-= runtime
->boundary
;
2559 runtime
->control
->appl_ptr
= appl_ptr
;
2562 snd_pcm_stream_unlock_irq(substream
);
2566 static int snd_pcm_hwsync(struct snd_pcm_substream
*substream
)
2568 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2571 snd_pcm_stream_lock_irq(substream
);
2572 switch (runtime
->status
->state
) {
2573 case SNDRV_PCM_STATE_DRAINING
:
2574 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2577 case SNDRV_PCM_STATE_RUNNING
:
2578 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2581 case SNDRV_PCM_STATE_PREPARED
:
2582 case SNDRV_PCM_STATE_SUSPENDED
:
2585 case SNDRV_PCM_STATE_XRUN
:
2593 snd_pcm_stream_unlock_irq(substream
);
2597 static int snd_pcm_delay(struct snd_pcm_substream
*substream
,
2598 snd_pcm_sframes_t __user
*res
)
2600 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2602 snd_pcm_sframes_t n
= 0;
2604 snd_pcm_stream_lock_irq(substream
);
2605 switch (runtime
->status
->state
) {
2606 case SNDRV_PCM_STATE_DRAINING
:
2607 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2610 case SNDRV_PCM_STATE_RUNNING
:
2611 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2614 case SNDRV_PCM_STATE_PREPARED
:
2615 case SNDRV_PCM_STATE_SUSPENDED
:
2617 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2618 n
= snd_pcm_playback_hw_avail(runtime
);
2620 n
= snd_pcm_capture_avail(runtime
);
2621 n
+= runtime
->delay
;
2623 case SNDRV_PCM_STATE_XRUN
:
2631 snd_pcm_stream_unlock_irq(substream
);
2633 if (put_user(n
, res
))
2638 static int snd_pcm_sync_ptr(struct snd_pcm_substream
*substream
,
2639 struct snd_pcm_sync_ptr __user
*_sync_ptr
)
2641 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2642 struct snd_pcm_sync_ptr sync_ptr
;
2643 volatile struct snd_pcm_mmap_status
*status
;
2644 volatile struct snd_pcm_mmap_control
*control
;
2647 memset(&sync_ptr
, 0, sizeof(sync_ptr
));
2648 if (get_user(sync_ptr
.flags
, (unsigned __user
*)&(_sync_ptr
->flags
)))
2650 if (copy_from_user(&sync_ptr
.c
.control
, &(_sync_ptr
->c
.control
), sizeof(struct snd_pcm_mmap_control
)))
2652 status
= runtime
->status
;
2653 control
= runtime
->control
;
2654 if (sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_HWSYNC
) {
2655 err
= snd_pcm_hwsync(substream
);
2659 snd_pcm_stream_lock_irq(substream
);
2660 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_APPL
))
2661 control
->appl_ptr
= sync_ptr
.c
.control
.appl_ptr
;
2663 sync_ptr
.c
.control
.appl_ptr
= control
->appl_ptr
;
2664 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_AVAIL_MIN
))
2665 control
->avail_min
= sync_ptr
.c
.control
.avail_min
;
2667 sync_ptr
.c
.control
.avail_min
= control
->avail_min
;
2668 sync_ptr
.s
.status
.state
= status
->state
;
2669 sync_ptr
.s
.status
.hw_ptr
= status
->hw_ptr
;
2670 sync_ptr
.s
.status
.tstamp
= status
->tstamp
;
2671 sync_ptr
.s
.status
.suspended_state
= status
->suspended_state
;
2672 snd_pcm_stream_unlock_irq(substream
);
2673 if (copy_to_user(_sync_ptr
, &sync_ptr
, sizeof(sync_ptr
)))
2678 static int snd_pcm_tstamp(struct snd_pcm_substream
*substream
, int __user
*_arg
)
2680 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2683 if (get_user(arg
, _arg
))
2685 if (arg
< 0 || arg
> SNDRV_PCM_TSTAMP_TYPE_LAST
)
2687 runtime
->tstamp_type
= arg
;
2691 static int snd_pcm_common_ioctl1(struct file
*file
,
2692 struct snd_pcm_substream
*substream
,
2693 unsigned int cmd
, void __user
*arg
)
2696 case SNDRV_PCM_IOCTL_PVERSION
:
2697 return put_user(SNDRV_PCM_VERSION
, (int __user
*)arg
) ? -EFAULT
: 0;
2698 case SNDRV_PCM_IOCTL_INFO
:
2699 return snd_pcm_info_user(substream
, arg
);
2700 case SNDRV_PCM_IOCTL_TSTAMP
: /* just for compatibility */
2702 case SNDRV_PCM_IOCTL_TTSTAMP
:
2703 return snd_pcm_tstamp(substream
, arg
);
2704 case SNDRV_PCM_IOCTL_HW_REFINE
:
2705 return snd_pcm_hw_refine_user(substream
, arg
);
2706 case SNDRV_PCM_IOCTL_HW_PARAMS
:
2707 return snd_pcm_hw_params_user(substream
, arg
);
2708 case SNDRV_PCM_IOCTL_HW_FREE
:
2709 return snd_pcm_hw_free(substream
);
2710 case SNDRV_PCM_IOCTL_SW_PARAMS
:
2711 return snd_pcm_sw_params_user(substream
, arg
);
2712 case SNDRV_PCM_IOCTL_STATUS
:
2713 return snd_pcm_status_user(substream
, arg
);
2714 case SNDRV_PCM_IOCTL_CHANNEL_INFO
:
2715 return snd_pcm_channel_info_user(substream
, arg
);
2716 case SNDRV_PCM_IOCTL_PREPARE
:
2717 return snd_pcm_prepare(substream
, file
);
2718 case SNDRV_PCM_IOCTL_RESET
:
2719 return snd_pcm_reset(substream
);
2720 case SNDRV_PCM_IOCTL_START
:
2721 return snd_pcm_action_lock_irq(&snd_pcm_action_start
, substream
, SNDRV_PCM_STATE_RUNNING
);
2722 case SNDRV_PCM_IOCTL_LINK
:
2723 return snd_pcm_link(substream
, (int)(unsigned long) arg
);
2724 case SNDRV_PCM_IOCTL_UNLINK
:
2725 return snd_pcm_unlink(substream
);
2726 case SNDRV_PCM_IOCTL_RESUME
:
2727 return snd_pcm_resume(substream
);
2728 case SNDRV_PCM_IOCTL_XRUN
:
2729 return snd_pcm_xrun(substream
);
2730 case SNDRV_PCM_IOCTL_HWSYNC
:
2731 return snd_pcm_hwsync(substream
);
2732 case SNDRV_PCM_IOCTL_DELAY
:
2733 return snd_pcm_delay(substream
, arg
);
2734 case SNDRV_PCM_IOCTL_SYNC_PTR
:
2735 return snd_pcm_sync_ptr(substream
, arg
);
2736 #ifdef CONFIG_SND_SUPPORT_OLD_API
2737 case SNDRV_PCM_IOCTL_HW_REFINE_OLD
:
2738 return snd_pcm_hw_refine_old_user(substream
, arg
);
2739 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD
:
2740 return snd_pcm_hw_params_old_user(substream
, arg
);
2742 case SNDRV_PCM_IOCTL_DRAIN
:
2743 return snd_pcm_drain(substream
, file
);
2744 case SNDRV_PCM_IOCTL_DROP
:
2745 return snd_pcm_drop(substream
);
2746 case SNDRV_PCM_IOCTL_PAUSE
:
2749 snd_pcm_stream_lock_irq(substream
);
2750 res
= snd_pcm_pause(substream
, (int)(unsigned long)arg
);
2751 snd_pcm_stream_unlock_irq(substream
);
2755 pcm_dbg(substream
->pcm
, "unknown ioctl = 0x%x\n", cmd
);
2759 static int snd_pcm_playback_ioctl1(struct file
*file
,
2760 struct snd_pcm_substream
*substream
,
2761 unsigned int cmd
, void __user
*arg
)
2763 if (snd_BUG_ON(!substream
))
2765 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
2768 case SNDRV_PCM_IOCTL_WRITEI_FRAMES
:
2770 struct snd_xferi xferi
;
2771 struct snd_xferi __user
*_xferi
= arg
;
2772 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2773 snd_pcm_sframes_t result
;
2774 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2776 if (put_user(0, &_xferi
->result
))
2778 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2780 result
= snd_pcm_lib_write(substream
, xferi
.buf
, xferi
.frames
);
2781 __put_user(result
, &_xferi
->result
);
2782 return result
< 0 ? result
: 0;
2784 case SNDRV_PCM_IOCTL_WRITEN_FRAMES
:
2786 struct snd_xfern xfern
;
2787 struct snd_xfern __user
*_xfern
= arg
;
2788 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2790 snd_pcm_sframes_t result
;
2791 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2793 if (runtime
->channels
> 128)
2795 if (put_user(0, &_xfern
->result
))
2797 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2800 bufs
= memdup_user(xfern
.bufs
,
2801 sizeof(void *) * runtime
->channels
);
2803 return PTR_ERR(bufs
);
2804 result
= snd_pcm_lib_writev(substream
, bufs
, xfern
.frames
);
2806 __put_user(result
, &_xfern
->result
);
2807 return result
< 0 ? result
: 0;
2809 case SNDRV_PCM_IOCTL_REWIND
:
2811 snd_pcm_uframes_t frames
;
2812 snd_pcm_uframes_t __user
*_frames
= arg
;
2813 snd_pcm_sframes_t result
;
2814 if (get_user(frames
, _frames
))
2816 if (put_user(0, _frames
))
2818 result
= snd_pcm_playback_rewind(substream
, frames
);
2819 __put_user(result
, _frames
);
2820 return result
< 0 ? result
: 0;
2822 case SNDRV_PCM_IOCTL_FORWARD
:
2824 snd_pcm_uframes_t frames
;
2825 snd_pcm_uframes_t __user
*_frames
= arg
;
2826 snd_pcm_sframes_t result
;
2827 if (get_user(frames
, _frames
))
2829 if (put_user(0, _frames
))
2831 result
= snd_pcm_playback_forward(substream
, frames
);
2832 __put_user(result
, _frames
);
2833 return result
< 0 ? result
: 0;
2836 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2839 static int snd_pcm_capture_ioctl1(struct file
*file
,
2840 struct snd_pcm_substream
*substream
,
2841 unsigned int cmd
, void __user
*arg
)
2843 if (snd_BUG_ON(!substream
))
2845 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_CAPTURE
))
2848 case SNDRV_PCM_IOCTL_READI_FRAMES
:
2850 struct snd_xferi xferi
;
2851 struct snd_xferi __user
*_xferi
= arg
;
2852 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2853 snd_pcm_sframes_t result
;
2854 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2856 if (put_user(0, &_xferi
->result
))
2858 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2860 result
= snd_pcm_lib_read(substream
, xferi
.buf
, xferi
.frames
);
2861 __put_user(result
, &_xferi
->result
);
2862 return result
< 0 ? result
: 0;
2864 case SNDRV_PCM_IOCTL_READN_FRAMES
:
2866 struct snd_xfern xfern
;
2867 struct snd_xfern __user
*_xfern
= arg
;
2868 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2870 snd_pcm_sframes_t result
;
2871 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2873 if (runtime
->channels
> 128)
2875 if (put_user(0, &_xfern
->result
))
2877 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2880 bufs
= memdup_user(xfern
.bufs
,
2881 sizeof(void *) * runtime
->channels
);
2883 return PTR_ERR(bufs
);
2884 result
= snd_pcm_lib_readv(substream
, bufs
, xfern
.frames
);
2886 __put_user(result
, &_xfern
->result
);
2887 return result
< 0 ? result
: 0;
2889 case SNDRV_PCM_IOCTL_REWIND
:
2891 snd_pcm_uframes_t frames
;
2892 snd_pcm_uframes_t __user
*_frames
= arg
;
2893 snd_pcm_sframes_t result
;
2894 if (get_user(frames
, _frames
))
2896 if (put_user(0, _frames
))
2898 result
= snd_pcm_capture_rewind(substream
, frames
);
2899 __put_user(result
, _frames
);
2900 return result
< 0 ? result
: 0;
2902 case SNDRV_PCM_IOCTL_FORWARD
:
2904 snd_pcm_uframes_t frames
;
2905 snd_pcm_uframes_t __user
*_frames
= arg
;
2906 snd_pcm_sframes_t result
;
2907 if (get_user(frames
, _frames
))
2909 if (put_user(0, _frames
))
2911 result
= snd_pcm_capture_forward(substream
, frames
);
2912 __put_user(result
, _frames
);
2913 return result
< 0 ? result
: 0;
2916 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2919 static long snd_pcm_playback_ioctl(struct file
*file
, unsigned int cmd
,
2922 struct snd_pcm_file
*pcm_file
;
2924 pcm_file
= file
->private_data
;
2926 if (((cmd
>> 8) & 0xff) != 'A')
2929 return snd_pcm_playback_ioctl1(file
, pcm_file
->substream
, cmd
,
2930 (void __user
*)arg
);
2933 static long snd_pcm_capture_ioctl(struct file
*file
, unsigned int cmd
,
2936 struct snd_pcm_file
*pcm_file
;
2938 pcm_file
= file
->private_data
;
2940 if (((cmd
>> 8) & 0xff) != 'A')
2943 return snd_pcm_capture_ioctl1(file
, pcm_file
->substream
, cmd
,
2944 (void __user
*)arg
);
2947 int snd_pcm_kernel_ioctl(struct snd_pcm_substream
*substream
,
2948 unsigned int cmd
, void *arg
)
2953 fs
= snd_enter_user();
2954 switch (substream
->stream
) {
2955 case SNDRV_PCM_STREAM_PLAYBACK
:
2956 result
= snd_pcm_playback_ioctl1(NULL
, substream
, cmd
,
2957 (void __user
*)arg
);
2959 case SNDRV_PCM_STREAM_CAPTURE
:
2960 result
= snd_pcm_capture_ioctl1(NULL
, substream
, cmd
,
2961 (void __user
*)arg
);
2971 EXPORT_SYMBOL(snd_pcm_kernel_ioctl
);
2973 static ssize_t
snd_pcm_read(struct file
*file
, char __user
*buf
, size_t count
,
2976 struct snd_pcm_file
*pcm_file
;
2977 struct snd_pcm_substream
*substream
;
2978 struct snd_pcm_runtime
*runtime
;
2979 snd_pcm_sframes_t result
;
2981 pcm_file
= file
->private_data
;
2982 substream
= pcm_file
->substream
;
2983 if (PCM_RUNTIME_CHECK(substream
))
2985 runtime
= substream
->runtime
;
2986 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2988 if (!frame_aligned(runtime
, count
))
2990 count
= bytes_to_frames(runtime
, count
);
2991 result
= snd_pcm_lib_read(substream
, buf
, count
);
2993 result
= frames_to_bytes(runtime
, result
);
2997 static ssize_t
snd_pcm_write(struct file
*file
, const char __user
*buf
,
2998 size_t count
, loff_t
* offset
)
3000 struct snd_pcm_file
*pcm_file
;
3001 struct snd_pcm_substream
*substream
;
3002 struct snd_pcm_runtime
*runtime
;
3003 snd_pcm_sframes_t result
;
3005 pcm_file
= file
->private_data
;
3006 substream
= pcm_file
->substream
;
3007 if (PCM_RUNTIME_CHECK(substream
))
3009 runtime
= substream
->runtime
;
3010 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3012 if (!frame_aligned(runtime
, count
))
3014 count
= bytes_to_frames(runtime
, count
);
3015 result
= snd_pcm_lib_write(substream
, buf
, count
);
3017 result
= frames_to_bytes(runtime
, result
);
3021 static ssize_t
snd_pcm_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
3022 unsigned long nr_segs
, loff_t pos
)
3025 struct snd_pcm_file
*pcm_file
;
3026 struct snd_pcm_substream
*substream
;
3027 struct snd_pcm_runtime
*runtime
;
3028 snd_pcm_sframes_t result
;
3031 snd_pcm_uframes_t frames
;
3033 pcm_file
= iocb
->ki_filp
->private_data
;
3034 substream
= pcm_file
->substream
;
3035 if (PCM_RUNTIME_CHECK(substream
))
3037 runtime
= substream
->runtime
;
3038 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3040 if (nr_segs
> 1024 || nr_segs
!= runtime
->channels
)
3042 if (!frame_aligned(runtime
, iov
->iov_len
))
3044 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
3045 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
3048 for (i
= 0; i
< nr_segs
; ++i
)
3049 bufs
[i
] = iov
[i
].iov_base
;
3050 result
= snd_pcm_lib_readv(substream
, bufs
, frames
);
3052 result
= frames_to_bytes(runtime
, result
);
3057 static ssize_t
snd_pcm_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
3058 unsigned long nr_segs
, loff_t pos
)
3060 struct snd_pcm_file
*pcm_file
;
3061 struct snd_pcm_substream
*substream
;
3062 struct snd_pcm_runtime
*runtime
;
3063 snd_pcm_sframes_t result
;
3066 snd_pcm_uframes_t frames
;
3068 pcm_file
= iocb
->ki_filp
->private_data
;
3069 substream
= pcm_file
->substream
;
3070 if (PCM_RUNTIME_CHECK(substream
))
3072 runtime
= substream
->runtime
;
3073 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3075 if (nr_segs
> 128 || nr_segs
!= runtime
->channels
||
3076 !frame_aligned(runtime
, iov
->iov_len
))
3078 frames
= bytes_to_samples(runtime
, iov
->iov_len
);
3079 bufs
= kmalloc(sizeof(void *) * nr_segs
, GFP_KERNEL
);
3082 for (i
= 0; i
< nr_segs
; ++i
)
3083 bufs
[i
] = iov
[i
].iov_base
;
3084 result
= snd_pcm_lib_writev(substream
, bufs
, frames
);
3086 result
= frames_to_bytes(runtime
, result
);
3091 static unsigned int snd_pcm_playback_poll(struct file
*file
, poll_table
* wait
)
3093 struct snd_pcm_file
*pcm_file
;
3094 struct snd_pcm_substream
*substream
;
3095 struct snd_pcm_runtime
*runtime
;
3097 snd_pcm_uframes_t avail
;
3099 pcm_file
= file
->private_data
;
3101 substream
= pcm_file
->substream
;
3102 if (PCM_RUNTIME_CHECK(substream
))
3104 runtime
= substream
->runtime
;
3106 poll_wait(file
, &runtime
->sleep
, wait
);
3108 snd_pcm_stream_lock_irq(substream
);
3109 avail
= snd_pcm_playback_avail(runtime
);
3110 switch (runtime
->status
->state
) {
3111 case SNDRV_PCM_STATE_RUNNING
:
3112 case SNDRV_PCM_STATE_PREPARED
:
3113 case SNDRV_PCM_STATE_PAUSED
:
3114 if (avail
>= runtime
->control
->avail_min
) {
3115 mask
= POLLOUT
| POLLWRNORM
;
3119 case SNDRV_PCM_STATE_DRAINING
:
3123 mask
= POLLOUT
| POLLWRNORM
| POLLERR
;
3126 snd_pcm_stream_unlock_irq(substream
);
3130 static unsigned int snd_pcm_capture_poll(struct file
*file
, poll_table
* wait
)
3132 struct snd_pcm_file
*pcm_file
;
3133 struct snd_pcm_substream
*substream
;
3134 struct snd_pcm_runtime
*runtime
;
3136 snd_pcm_uframes_t avail
;
3138 pcm_file
= file
->private_data
;
3140 substream
= pcm_file
->substream
;
3141 if (PCM_RUNTIME_CHECK(substream
))
3143 runtime
= substream
->runtime
;
3145 poll_wait(file
, &runtime
->sleep
, wait
);
3147 snd_pcm_stream_lock_irq(substream
);
3148 avail
= snd_pcm_capture_avail(runtime
);
3149 switch (runtime
->status
->state
) {
3150 case SNDRV_PCM_STATE_RUNNING
:
3151 case SNDRV_PCM_STATE_PREPARED
:
3152 case SNDRV_PCM_STATE_PAUSED
:
3153 if (avail
>= runtime
->control
->avail_min
) {
3154 mask
= POLLIN
| POLLRDNORM
;
3159 case SNDRV_PCM_STATE_DRAINING
:
3161 mask
= POLLIN
| POLLRDNORM
;
3166 mask
= POLLIN
| POLLRDNORM
| POLLERR
;
3169 snd_pcm_stream_unlock_irq(substream
);
3178 * Only on coherent architectures, we can mmap the status and the control records
3179 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3181 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3183 * mmap status record
3185 static int snd_pcm_mmap_status_fault(struct vm_area_struct
*area
,
3186 struct vm_fault
*vmf
)
3188 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3189 struct snd_pcm_runtime
*runtime
;
3191 if (substream
== NULL
)
3192 return VM_FAULT_SIGBUS
;
3193 runtime
= substream
->runtime
;
3194 vmf
->page
= virt_to_page(runtime
->status
);
3195 get_page(vmf
->page
);
3199 static const struct vm_operations_struct snd_pcm_vm_ops_status
=
3201 .fault
= snd_pcm_mmap_status_fault
,
3204 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3205 struct vm_area_struct
*area
)
3208 if (!(area
->vm_flags
& VM_READ
))
3210 size
= area
->vm_end
- area
->vm_start
;
3211 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)))
3213 area
->vm_ops
= &snd_pcm_vm_ops_status
;
3214 area
->vm_private_data
= substream
;
3215 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3220 * mmap control record
3222 static int snd_pcm_mmap_control_fault(struct vm_area_struct
*area
,
3223 struct vm_fault
*vmf
)
3225 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3226 struct snd_pcm_runtime
*runtime
;
3228 if (substream
== NULL
)
3229 return VM_FAULT_SIGBUS
;
3230 runtime
= substream
->runtime
;
3231 vmf
->page
= virt_to_page(runtime
->control
);
3232 get_page(vmf
->page
);
3236 static const struct vm_operations_struct snd_pcm_vm_ops_control
=
3238 .fault
= snd_pcm_mmap_control_fault
,
3241 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3242 struct vm_area_struct
*area
)
3245 if (!(area
->vm_flags
& VM_READ
))
3247 size
= area
->vm_end
- area
->vm_start
;
3248 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
)))
3250 area
->vm_ops
= &snd_pcm_vm_ops_control
;
3251 area
->vm_private_data
= substream
;
3252 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3255 #else /* ! coherent mmap */
3257 * don't support mmap for status and control records.
3259 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3260 struct vm_area_struct
*area
)
3264 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3265 struct vm_area_struct
*area
)
3269 #endif /* coherent mmap */
3271 static inline struct page
*
3272 snd_pcm_default_page_ops(struct snd_pcm_substream
*substream
, unsigned long ofs
)
3274 void *vaddr
= substream
->runtime
->dma_area
+ ofs
;
3275 return virt_to_page(vaddr
);
3279 * fault callback for mmapping a RAM page
3281 static int snd_pcm_mmap_data_fault(struct vm_area_struct
*area
,
3282 struct vm_fault
*vmf
)
3284 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3285 struct snd_pcm_runtime
*runtime
;
3286 unsigned long offset
;
3290 if (substream
== NULL
)
3291 return VM_FAULT_SIGBUS
;
3292 runtime
= substream
->runtime
;
3293 offset
= vmf
->pgoff
<< PAGE_SHIFT
;
3294 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3295 if (offset
> dma_bytes
- PAGE_SIZE
)
3296 return VM_FAULT_SIGBUS
;
3297 if (substream
->ops
->page
)
3298 page
= substream
->ops
->page(substream
, offset
);
3300 page
= snd_pcm_default_page_ops(substream
, offset
);
3302 return VM_FAULT_SIGBUS
;
3308 static const struct vm_operations_struct snd_pcm_vm_ops_data
= {
3309 .open
= snd_pcm_mmap_data_open
,
3310 .close
= snd_pcm_mmap_data_close
,
3313 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault
= {
3314 .open
= snd_pcm_mmap_data_open
,
3315 .close
= snd_pcm_mmap_data_close
,
3316 .fault
= snd_pcm_mmap_data_fault
,
3320 * mmap the DMA buffer on RAM
3324 * snd_pcm_lib_default_mmap - Default PCM data mmap function
3325 * @substream: PCM substream
3328 * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL,
3329 * this function is invoked implicitly.
3331 int snd_pcm_lib_default_mmap(struct snd_pcm_substream
*substream
,
3332 struct vm_area_struct
*area
)
3334 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3335 #ifdef CONFIG_GENERIC_ALLOCATOR
3336 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV_IRAM
) {
3337 area
->vm_page_prot
= pgprot_writecombine(area
->vm_page_prot
);
3338 return remap_pfn_range(area
, area
->vm_start
,
3339 substream
->dma_buffer
.addr
>> PAGE_SHIFT
,
3340 area
->vm_end
- area
->vm_start
, area
->vm_page_prot
);
3342 #endif /* CONFIG_GENERIC_ALLOCATOR */
3343 #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
3344 if (!substream
->ops
->page
&&
3345 substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3346 return dma_mmap_coherent(substream
->dma_buffer
.dev
.dev
,
3348 substream
->runtime
->dma_area
,
3349 substream
->runtime
->dma_addr
,
3350 area
->vm_end
- area
->vm_start
);
3351 #endif /* CONFIG_X86 */
3352 /* mmap with fault handler */
3353 area
->vm_ops
= &snd_pcm_vm_ops_data_fault
;
3356 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap
);
3359 * mmap the DMA buffer on I/O memory area
3361 #if SNDRV_PCM_INFO_MMAP_IOMEM
3363 * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
3364 * @substream: PCM substream
3367 * When your hardware uses the iomapped pages as the hardware buffer and
3368 * wants to mmap it, pass this function as mmap pcm_ops. Note that this
3369 * is supposed to work only on limited architectures.
3371 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream
*substream
,
3372 struct vm_area_struct
*area
)
3374 struct snd_pcm_runtime
*runtime
= substream
->runtime
;;
3376 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3377 return vm_iomap_memory(area
, runtime
->dma_addr
, runtime
->dma_bytes
);
3380 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem
);
3381 #endif /* SNDRV_PCM_INFO_MMAP */
3386 int snd_pcm_mmap_data(struct snd_pcm_substream
*substream
, struct file
*file
,
3387 struct vm_area_struct
*area
)
3389 struct snd_pcm_runtime
*runtime
;
3391 unsigned long offset
;
3395 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
3396 if (!(area
->vm_flags
& (VM_WRITE
|VM_READ
)))
3399 if (!(area
->vm_flags
& VM_READ
))
3402 runtime
= substream
->runtime
;
3403 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3405 if (!(runtime
->info
& SNDRV_PCM_INFO_MMAP
))
3407 if (runtime
->access
== SNDRV_PCM_ACCESS_RW_INTERLEAVED
||
3408 runtime
->access
== SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
)
3410 size
= area
->vm_end
- area
->vm_start
;
3411 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3412 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3413 if ((size_t)size
> dma_bytes
)
3415 if (offset
> dma_bytes
- size
)
3418 area
->vm_ops
= &snd_pcm_vm_ops_data
;
3419 area
->vm_private_data
= substream
;
3420 if (substream
->ops
->mmap
)
3421 err
= substream
->ops
->mmap(substream
, area
);
3423 err
= snd_pcm_lib_default_mmap(substream
, area
);
3425 atomic_inc(&substream
->mmap_count
);
3429 EXPORT_SYMBOL(snd_pcm_mmap_data
);
3431 static int snd_pcm_mmap(struct file
*file
, struct vm_area_struct
*area
)
3433 struct snd_pcm_file
* pcm_file
;
3434 struct snd_pcm_substream
*substream
;
3435 unsigned long offset
;
3437 pcm_file
= file
->private_data
;
3438 substream
= pcm_file
->substream
;
3439 if (PCM_RUNTIME_CHECK(substream
))
3442 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3444 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3445 if (pcm_file
->no_compat_mmap
)
3447 return snd_pcm_mmap_status(substream
, file
, area
);
3448 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3449 if (pcm_file
->no_compat_mmap
)
3451 return snd_pcm_mmap_control(substream
, file
, area
);
3453 return snd_pcm_mmap_data(substream
, file
, area
);
3458 static int snd_pcm_fasync(int fd
, struct file
* file
, int on
)
3460 struct snd_pcm_file
* pcm_file
;
3461 struct snd_pcm_substream
*substream
;
3462 struct snd_pcm_runtime
*runtime
;
3464 pcm_file
= file
->private_data
;
3465 substream
= pcm_file
->substream
;
3466 if (PCM_RUNTIME_CHECK(substream
))
3468 runtime
= substream
->runtime
;
3469 return fasync_helper(fd
, file
, on
, &runtime
->fasync
);
3475 #ifdef CONFIG_COMPAT
3476 #include "pcm_compat.c"
3478 #define snd_pcm_ioctl_compat NULL
3482 * To be removed helpers to keep binary compatibility
3485 #ifdef CONFIG_SND_SUPPORT_OLD_API
3486 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3487 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3489 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params
*params
,
3490 struct snd_pcm_hw_params_old
*oparams
)
3494 memset(params
, 0, sizeof(*params
));
3495 params
->flags
= oparams
->flags
;
3496 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3497 params
->masks
[i
].bits
[0] = oparams
->masks
[i
];
3498 memcpy(params
->intervals
, oparams
->intervals
, sizeof(oparams
->intervals
));
3499 params
->rmask
= __OLD_TO_NEW_MASK(oparams
->rmask
);
3500 params
->cmask
= __OLD_TO_NEW_MASK(oparams
->cmask
);
3501 params
->info
= oparams
->info
;
3502 params
->msbits
= oparams
->msbits
;
3503 params
->rate_num
= oparams
->rate_num
;
3504 params
->rate_den
= oparams
->rate_den
;
3505 params
->fifo_size
= oparams
->fifo_size
;
3508 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old
*oparams
,
3509 struct snd_pcm_hw_params
*params
)
3513 memset(oparams
, 0, sizeof(*oparams
));
3514 oparams
->flags
= params
->flags
;
3515 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3516 oparams
->masks
[i
] = params
->masks
[i
].bits
[0];
3517 memcpy(oparams
->intervals
, params
->intervals
, sizeof(oparams
->intervals
));
3518 oparams
->rmask
= __NEW_TO_OLD_MASK(params
->rmask
);
3519 oparams
->cmask
= __NEW_TO_OLD_MASK(params
->cmask
);
3520 oparams
->info
= params
->info
;
3521 oparams
->msbits
= params
->msbits
;
3522 oparams
->rate_num
= params
->rate_num
;
3523 oparams
->rate_den
= params
->rate_den
;
3524 oparams
->fifo_size
= params
->fifo_size
;
3527 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
3528 struct snd_pcm_hw_params_old __user
* _oparams
)
3530 struct snd_pcm_hw_params
*params
;
3531 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3534 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3538 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3539 if (IS_ERR(oparams
)) {
3540 err
= PTR_ERR(oparams
);
3543 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3544 err
= snd_pcm_hw_refine(substream
, params
);
3545 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3546 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3557 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
3558 struct snd_pcm_hw_params_old __user
* _oparams
)
3560 struct snd_pcm_hw_params
*params
;
3561 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3564 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3568 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3569 if (IS_ERR(oparams
)) {
3570 err
= PTR_ERR(oparams
);
3573 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3574 err
= snd_pcm_hw_params(substream
, params
);
3575 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3576 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3586 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3589 static unsigned long snd_pcm_get_unmapped_area(struct file
*file
,
3592 unsigned long pgoff
,
3593 unsigned long flags
)
3595 struct snd_pcm_file
*pcm_file
= file
->private_data
;
3596 struct snd_pcm_substream
*substream
= pcm_file
->substream
;
3597 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
3598 unsigned long offset
= pgoff
<< PAGE_SHIFT
;
3601 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3602 return (unsigned long)runtime
->status
;
3603 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3604 return (unsigned long)runtime
->control
;
3606 return (unsigned long)runtime
->dma_area
+ offset
;
3610 # define snd_pcm_get_unmapped_area NULL
3617 const struct file_operations snd_pcm_f_ops
[2] = {
3619 .owner
= THIS_MODULE
,
3620 .write
= snd_pcm_write
,
3621 .aio_write
= snd_pcm_aio_write
,
3622 .open
= snd_pcm_playback_open
,
3623 .release
= snd_pcm_release
,
3624 .llseek
= no_llseek
,
3625 .poll
= snd_pcm_playback_poll
,
3626 .unlocked_ioctl
= snd_pcm_playback_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
,
3633 .owner
= THIS_MODULE
,
3634 .read
= snd_pcm_read
,
3635 .aio_read
= snd_pcm_aio_read
,
3636 .open
= snd_pcm_capture_open
,
3637 .release
= snd_pcm_release
,
3638 .llseek
= no_llseek
,
3639 .poll
= snd_pcm_capture_poll
,
3640 .unlocked_ioctl
= snd_pcm_capture_ioctl
,
3641 .compat_ioctl
= snd_pcm_ioctl_compat
,
3642 .mmap
= snd_pcm_mmap
,
3643 .fasync
= snd_pcm_fasync
,
3644 .get_unmapped_area
= snd_pcm_get_unmapped_area
,