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>
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>
37 #include <linux/uio.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 SNDRV_PCM_INFO_DRAIN_TRIGGER
);
425 if (!hw_support_mmap(substream
))
426 params
->info
&= ~(SNDRV_PCM_INFO_MMAP
|
427 SNDRV_PCM_INFO_MMAP_VALID
);
429 if (!params
->fifo_size
) {
430 m
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
431 i
= hw_param_interval(params
, SNDRV_PCM_HW_PARAM_CHANNELS
);
432 if (snd_mask_min(m
) == snd_mask_max(m
) &&
433 snd_interval_min(i
) == snd_interval_max(i
)) {
434 changed
= substream
->ops
->ioctl(substream
,
435 SNDRV_PCM_IOCTL1_FIFO_SIZE
, params
);
444 EXPORT_SYMBOL(snd_pcm_hw_refine
);
446 static int snd_pcm_hw_refine_user(struct snd_pcm_substream
*substream
,
447 struct snd_pcm_hw_params __user
* _params
)
449 struct snd_pcm_hw_params
*params
;
452 params
= memdup_user(_params
, sizeof(*params
));
454 return PTR_ERR(params
);
456 err
= snd_pcm_hw_refine(substream
, params
);
457 if (copy_to_user(_params
, params
, sizeof(*params
))) {
466 static int period_to_usecs(struct snd_pcm_runtime
*runtime
)
471 return -1; /* invalid */
473 /* take 75% of period time as the deadline */
474 usecs
= (750000 / runtime
->rate
) * runtime
->period_size
;
475 usecs
+= ((750000 % runtime
->rate
) * runtime
->period_size
) /
481 static void snd_pcm_set_state(struct snd_pcm_substream
*substream
, int state
)
483 snd_pcm_stream_lock_irq(substream
);
484 if (substream
->runtime
->status
->state
!= SNDRV_PCM_STATE_DISCONNECTED
)
485 substream
->runtime
->status
->state
= state
;
486 snd_pcm_stream_unlock_irq(substream
);
489 static int snd_pcm_hw_params(struct snd_pcm_substream
*substream
,
490 struct snd_pcm_hw_params
*params
)
492 struct snd_pcm_runtime
*runtime
;
495 snd_pcm_uframes_t frames
;
497 if (PCM_RUNTIME_CHECK(substream
))
499 runtime
= substream
->runtime
;
500 snd_pcm_stream_lock_irq(substream
);
501 switch (runtime
->status
->state
) {
502 case SNDRV_PCM_STATE_OPEN
:
503 case SNDRV_PCM_STATE_SETUP
:
504 case SNDRV_PCM_STATE_PREPARED
:
507 snd_pcm_stream_unlock_irq(substream
);
510 snd_pcm_stream_unlock_irq(substream
);
511 #if IS_ENABLED(CONFIG_SND_PCM_OSS)
512 if (!substream
->oss
.oss
)
514 if (atomic_read(&substream
->mmap_count
))
518 err
= snd_pcm_hw_refine(substream
, params
);
522 err
= snd_pcm_hw_params_choose(substream
, params
);
526 if (substream
->ops
->hw_params
!= NULL
) {
527 err
= substream
->ops
->hw_params(substream
, params
);
532 runtime
->access
= params_access(params
);
533 runtime
->format
= params_format(params
);
534 runtime
->subformat
= params_subformat(params
);
535 runtime
->channels
= params_channels(params
);
536 runtime
->rate
= params_rate(params
);
537 runtime
->period_size
= params_period_size(params
);
538 runtime
->periods
= params_periods(params
);
539 runtime
->buffer_size
= params_buffer_size(params
);
540 runtime
->info
= params
->info
;
541 runtime
->rate_num
= params
->rate_num
;
542 runtime
->rate_den
= params
->rate_den
;
543 runtime
->no_period_wakeup
=
544 (params
->info
& SNDRV_PCM_INFO_NO_PERIOD_WAKEUP
) &&
545 (params
->flags
& SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP
);
547 bits
= snd_pcm_format_physical_width(runtime
->format
);
548 runtime
->sample_bits
= bits
;
549 bits
*= runtime
->channels
;
550 runtime
->frame_bits
= bits
;
552 while (bits
% 8 != 0) {
556 runtime
->byte_align
= bits
/ 8;
557 runtime
->min_align
= frames
;
559 /* Default sw params */
560 runtime
->tstamp_mode
= SNDRV_PCM_TSTAMP_NONE
;
561 runtime
->period_step
= 1;
562 runtime
->control
->avail_min
= runtime
->period_size
;
563 runtime
->start_threshold
= 1;
564 runtime
->stop_threshold
= runtime
->buffer_size
;
565 runtime
->silence_threshold
= 0;
566 runtime
->silence_size
= 0;
567 runtime
->boundary
= runtime
->buffer_size
;
568 while (runtime
->boundary
* 2 <= LONG_MAX
- runtime
->buffer_size
)
569 runtime
->boundary
*= 2;
571 snd_pcm_timer_resolution_change(substream
);
572 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_SETUP
);
574 if (pm_qos_request_active(&substream
->latency_pm_qos_req
))
575 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
576 if ((usecs
= period_to_usecs(runtime
)) >= 0)
577 pm_qos_add_request(&substream
->latency_pm_qos_req
,
578 PM_QOS_CPU_DMA_LATENCY
, usecs
);
581 /* hardware might be unusable from this time,
582 so we force application to retry to set
583 the correct hardware parameter settings */
584 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_OPEN
);
585 if (substream
->ops
->hw_free
!= NULL
)
586 substream
->ops
->hw_free(substream
);
590 static int snd_pcm_hw_params_user(struct snd_pcm_substream
*substream
,
591 struct snd_pcm_hw_params __user
* _params
)
593 struct snd_pcm_hw_params
*params
;
596 params
= memdup_user(_params
, sizeof(*params
));
598 return PTR_ERR(params
);
600 err
= snd_pcm_hw_params(substream
, params
);
601 if (copy_to_user(_params
, params
, sizeof(*params
))) {
610 static int snd_pcm_hw_free(struct snd_pcm_substream
*substream
)
612 struct snd_pcm_runtime
*runtime
;
615 if (PCM_RUNTIME_CHECK(substream
))
617 runtime
= substream
->runtime
;
618 snd_pcm_stream_lock_irq(substream
);
619 switch (runtime
->status
->state
) {
620 case SNDRV_PCM_STATE_SETUP
:
621 case SNDRV_PCM_STATE_PREPARED
:
624 snd_pcm_stream_unlock_irq(substream
);
627 snd_pcm_stream_unlock_irq(substream
);
628 if (atomic_read(&substream
->mmap_count
))
630 if (substream
->ops
->hw_free
)
631 result
= substream
->ops
->hw_free(substream
);
632 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_OPEN
);
633 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
637 static int snd_pcm_sw_params(struct snd_pcm_substream
*substream
,
638 struct snd_pcm_sw_params
*params
)
640 struct snd_pcm_runtime
*runtime
;
643 if (PCM_RUNTIME_CHECK(substream
))
645 runtime
= substream
->runtime
;
646 snd_pcm_stream_lock_irq(substream
);
647 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
648 snd_pcm_stream_unlock_irq(substream
);
651 snd_pcm_stream_unlock_irq(substream
);
653 if (params
->tstamp_mode
> SNDRV_PCM_TSTAMP_LAST
)
655 if (params
->proto
>= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
656 params
->tstamp_type
> SNDRV_PCM_TSTAMP_TYPE_LAST
)
658 if (params
->avail_min
== 0)
660 if (params
->silence_size
>= runtime
->boundary
) {
661 if (params
->silence_threshold
!= 0)
664 if (params
->silence_size
> params
->silence_threshold
)
666 if (params
->silence_threshold
> runtime
->buffer_size
)
670 snd_pcm_stream_lock_irq(substream
);
671 runtime
->tstamp_mode
= params
->tstamp_mode
;
672 if (params
->proto
>= SNDRV_PROTOCOL_VERSION(2, 0, 12))
673 runtime
->tstamp_type
= params
->tstamp_type
;
674 runtime
->period_step
= params
->period_step
;
675 runtime
->control
->avail_min
= params
->avail_min
;
676 runtime
->start_threshold
= params
->start_threshold
;
677 runtime
->stop_threshold
= params
->stop_threshold
;
678 runtime
->silence_threshold
= params
->silence_threshold
;
679 runtime
->silence_size
= params
->silence_size
;
680 params
->boundary
= runtime
->boundary
;
681 if (snd_pcm_running(substream
)) {
682 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
683 runtime
->silence_size
> 0)
684 snd_pcm_playback_silence(substream
, ULONG_MAX
);
685 err
= snd_pcm_update_state(substream
, runtime
);
687 snd_pcm_stream_unlock_irq(substream
);
691 static int snd_pcm_sw_params_user(struct snd_pcm_substream
*substream
,
692 struct snd_pcm_sw_params __user
* _params
)
694 struct snd_pcm_sw_params params
;
696 if (copy_from_user(¶ms
, _params
, sizeof(params
)))
698 err
= snd_pcm_sw_params(substream
, ¶ms
);
699 if (copy_to_user(_params
, ¶ms
, sizeof(params
)))
704 int snd_pcm_status(struct snd_pcm_substream
*substream
,
705 struct snd_pcm_status
*status
)
707 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
709 snd_pcm_stream_lock_irq(substream
);
710 status
->state
= runtime
->status
->state
;
711 status
->suspended_state
= runtime
->status
->suspended_state
;
712 if (status
->state
== SNDRV_PCM_STATE_OPEN
)
714 status
->trigger_tstamp
= runtime
->trigger_tstamp
;
715 if (snd_pcm_running(substream
)) {
716 snd_pcm_update_hw_ptr(substream
);
717 if (runtime
->tstamp_mode
== SNDRV_PCM_TSTAMP_ENABLE
) {
718 status
->tstamp
= runtime
->status
->tstamp
;
719 status
->audio_tstamp
=
720 runtime
->status
->audio_tstamp
;
724 /* get tstamp only in fallback mode and only if enabled */
725 if (runtime
->tstamp_mode
== SNDRV_PCM_TSTAMP_ENABLE
)
726 snd_pcm_gettime(runtime
, &status
->tstamp
);
729 status
->appl_ptr
= runtime
->control
->appl_ptr
;
730 status
->hw_ptr
= runtime
->status
->hw_ptr
;
731 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
732 status
->avail
= snd_pcm_playback_avail(runtime
);
733 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
||
734 runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
735 status
->delay
= runtime
->buffer_size
- status
->avail
;
736 status
->delay
+= runtime
->delay
;
740 status
->avail
= snd_pcm_capture_avail(runtime
);
741 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
)
742 status
->delay
= status
->avail
+ runtime
->delay
;
746 status
->avail_max
= runtime
->avail_max
;
747 status
->overrange
= runtime
->overrange
;
748 runtime
->avail_max
= 0;
749 runtime
->overrange
= 0;
751 snd_pcm_stream_unlock_irq(substream
);
755 static int snd_pcm_status_user(struct snd_pcm_substream
*substream
,
756 struct snd_pcm_status __user
* _status
)
758 struct snd_pcm_status status
;
761 memset(&status
, 0, sizeof(status
));
762 res
= snd_pcm_status(substream
, &status
);
765 if (copy_to_user(_status
, &status
, sizeof(status
)))
770 static int snd_pcm_channel_info(struct snd_pcm_substream
*substream
,
771 struct snd_pcm_channel_info
* info
)
773 struct snd_pcm_runtime
*runtime
;
774 unsigned int channel
;
776 channel
= info
->channel
;
777 runtime
= substream
->runtime
;
778 snd_pcm_stream_lock_irq(substream
);
779 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
) {
780 snd_pcm_stream_unlock_irq(substream
);
783 snd_pcm_stream_unlock_irq(substream
);
784 if (channel
>= runtime
->channels
)
786 memset(info
, 0, sizeof(*info
));
787 info
->channel
= channel
;
788 return substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_CHANNEL_INFO
, info
);
791 static int snd_pcm_channel_info_user(struct snd_pcm_substream
*substream
,
792 struct snd_pcm_channel_info __user
* _info
)
794 struct snd_pcm_channel_info info
;
797 if (copy_from_user(&info
, _info
, sizeof(info
)))
799 res
= snd_pcm_channel_info(substream
, &info
);
802 if (copy_to_user(_info
, &info
, sizeof(info
)))
807 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream
*substream
)
809 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
810 if (runtime
->trigger_master
== NULL
)
812 if (runtime
->trigger_master
== substream
) {
813 if (!runtime
->trigger_tstamp_latched
)
814 snd_pcm_gettime(runtime
, &runtime
->trigger_tstamp
);
816 snd_pcm_trigger_tstamp(runtime
->trigger_master
);
817 runtime
->trigger_tstamp
= runtime
->trigger_master
->runtime
->trigger_tstamp
;
819 runtime
->trigger_master
= NULL
;
823 int (*pre_action
)(struct snd_pcm_substream
*substream
, int state
);
824 int (*do_action
)(struct snd_pcm_substream
*substream
, int state
);
825 void (*undo_action
)(struct snd_pcm_substream
*substream
, int state
);
826 void (*post_action
)(struct snd_pcm_substream
*substream
, int state
);
830 * this functions is core for handling of linked stream
831 * Note: the stream state might be changed also on failure
832 * Note2: call with calling stream lock + link lock
834 static int snd_pcm_action_group(struct action_ops
*ops
,
835 struct snd_pcm_substream
*substream
,
836 int state
, int do_lock
)
838 struct snd_pcm_substream
*s
= NULL
;
839 struct snd_pcm_substream
*s1
;
840 int res
= 0, depth
= 1;
842 snd_pcm_group_for_each_entry(s
, substream
) {
843 if (do_lock
&& s
!= substream
) {
844 if (s
->pcm
->nonatomic
)
845 mutex_lock_nested(&s
->self_group
.mutex
, depth
);
847 spin_lock_nested(&s
->self_group
.lock
, depth
);
850 res
= ops
->pre_action(s
, state
);
854 snd_pcm_group_for_each_entry(s
, substream
) {
855 res
= ops
->do_action(s
, state
);
857 if (ops
->undo_action
) {
858 snd_pcm_group_for_each_entry(s1
, substream
) {
859 if (s1
== s
) /* failed stream */
861 ops
->undo_action(s1
, state
);
864 s
= NULL
; /* unlock all */
868 snd_pcm_group_for_each_entry(s
, substream
) {
869 ops
->post_action(s
, state
);
874 snd_pcm_group_for_each_entry(s1
, substream
) {
875 if (s1
!= substream
) {
876 if (s1
->pcm
->nonatomic
)
877 mutex_unlock(&s1
->self_group
.mutex
);
879 spin_unlock(&s1
->self_group
.lock
);
881 if (s1
== s
) /* end */
889 * Note: call with stream lock
891 static int snd_pcm_action_single(struct action_ops
*ops
,
892 struct snd_pcm_substream
*substream
,
897 res
= ops
->pre_action(substream
, state
);
900 res
= ops
->do_action(substream
, state
);
902 ops
->post_action(substream
, state
);
903 else if (ops
->undo_action
)
904 ops
->undo_action(substream
, state
);
909 * Note: call with stream lock
911 static int snd_pcm_action(struct action_ops
*ops
,
912 struct snd_pcm_substream
*substream
,
917 if (!snd_pcm_stream_linked(substream
))
918 return snd_pcm_action_single(ops
, substream
, state
);
920 if (substream
->pcm
->nonatomic
) {
921 if (!mutex_trylock(&substream
->group
->mutex
)) {
922 mutex_unlock(&substream
->self_group
.mutex
);
923 mutex_lock(&substream
->group
->mutex
);
924 mutex_lock(&substream
->self_group
.mutex
);
926 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
927 mutex_unlock(&substream
->group
->mutex
);
929 if (!spin_trylock(&substream
->group
->lock
)) {
930 spin_unlock(&substream
->self_group
.lock
);
931 spin_lock(&substream
->group
->lock
);
932 spin_lock(&substream
->self_group
.lock
);
934 res
= snd_pcm_action_group(ops
, substream
, state
, 1);
935 spin_unlock(&substream
->group
->lock
);
941 * Note: don't use any locks before
943 static int snd_pcm_action_lock_irq(struct action_ops
*ops
,
944 struct snd_pcm_substream
*substream
,
949 snd_pcm_stream_lock_irq(substream
);
950 res
= snd_pcm_action(ops
, substream
, state
);
951 snd_pcm_stream_unlock_irq(substream
);
957 static int snd_pcm_action_nonatomic(struct action_ops
*ops
,
958 struct snd_pcm_substream
*substream
,
963 down_read(&snd_pcm_link_rwsem
);
964 if (snd_pcm_stream_linked(substream
))
965 res
= snd_pcm_action_group(ops
, substream
, state
, 0);
967 res
= snd_pcm_action_single(ops
, substream
, state
);
968 up_read(&snd_pcm_link_rwsem
);
975 static int snd_pcm_pre_start(struct snd_pcm_substream
*substream
, int state
)
977 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
978 if (runtime
->status
->state
!= SNDRV_PCM_STATE_PREPARED
)
980 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
981 !snd_pcm_playback_data(substream
))
983 runtime
->trigger_tstamp_latched
= false;
984 runtime
->trigger_master
= substream
;
988 static int snd_pcm_do_start(struct snd_pcm_substream
*substream
, int state
)
990 if (substream
->runtime
->trigger_master
!= substream
)
992 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_START
);
995 static void snd_pcm_undo_start(struct snd_pcm_substream
*substream
, int state
)
997 if (substream
->runtime
->trigger_master
== substream
)
998 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
1001 static void snd_pcm_post_start(struct snd_pcm_substream
*substream
, int state
)
1003 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1004 snd_pcm_trigger_tstamp(substream
);
1005 runtime
->hw_ptr_jiffies
= jiffies
;
1006 runtime
->hw_ptr_buffer_jiffies
= (runtime
->buffer_size
* HZ
) /
1008 runtime
->status
->state
= state
;
1009 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
1010 runtime
->silence_size
> 0)
1011 snd_pcm_playback_silence(substream
, ULONG_MAX
);
1012 if (substream
->timer
)
1013 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTART
,
1014 &runtime
->trigger_tstamp
);
1017 static struct action_ops snd_pcm_action_start
= {
1018 .pre_action
= snd_pcm_pre_start
,
1019 .do_action
= snd_pcm_do_start
,
1020 .undo_action
= snd_pcm_undo_start
,
1021 .post_action
= snd_pcm_post_start
1025 * snd_pcm_start - start all linked streams
1026 * @substream: the PCM substream instance
1028 * Return: Zero if successful, or a negative error code.
1030 int snd_pcm_start(struct snd_pcm_substream
*substream
)
1032 return snd_pcm_action(&snd_pcm_action_start
, substream
,
1033 SNDRV_PCM_STATE_RUNNING
);
1039 static int snd_pcm_pre_stop(struct snd_pcm_substream
*substream
, int state
)
1041 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1042 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1044 runtime
->trigger_master
= substream
;
1048 static int snd_pcm_do_stop(struct snd_pcm_substream
*substream
, int state
)
1050 if (substream
->runtime
->trigger_master
== substream
&&
1051 snd_pcm_running(substream
))
1052 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_STOP
);
1053 return 0; /* unconditonally stop all substreams */
1056 static void snd_pcm_post_stop(struct snd_pcm_substream
*substream
, int state
)
1058 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1059 if (runtime
->status
->state
!= state
) {
1060 snd_pcm_trigger_tstamp(substream
);
1061 runtime
->status
->state
= state
;
1062 if (substream
->timer
)
1063 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSTOP
,
1064 &runtime
->trigger_tstamp
);
1066 wake_up(&runtime
->sleep
);
1067 wake_up(&runtime
->tsleep
);
1070 static struct action_ops snd_pcm_action_stop
= {
1071 .pre_action
= snd_pcm_pre_stop
,
1072 .do_action
= snd_pcm_do_stop
,
1073 .post_action
= snd_pcm_post_stop
1077 * snd_pcm_stop - try to stop all running streams in the substream group
1078 * @substream: the PCM substream instance
1079 * @state: PCM state after stopping the stream
1081 * The state of each stream is then changed to the given state unconditionally.
1083 * Return: Zero if successful, or a negative error code.
1085 int snd_pcm_stop(struct snd_pcm_substream
*substream
, snd_pcm_state_t state
)
1087 return snd_pcm_action(&snd_pcm_action_stop
, substream
, state
);
1090 EXPORT_SYMBOL(snd_pcm_stop
);
1093 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
1094 * @substream: the PCM substream
1096 * After stopping, the state is changed to SETUP.
1097 * Unlike snd_pcm_stop(), this affects only the given stream.
1099 * Return: Zero if succesful, or a negative error code.
1101 int snd_pcm_drain_done(struct snd_pcm_substream
*substream
)
1103 return snd_pcm_action_single(&snd_pcm_action_stop
, substream
,
1104 SNDRV_PCM_STATE_SETUP
);
1108 * snd_pcm_stop_xrun - stop the running streams as XRUN
1109 * @substream: the PCM substream instance
1111 * This stops the given running substream (and all linked substreams) as XRUN.
1112 * Unlike snd_pcm_stop(), this function takes the substream lock by itself.
1114 * Return: Zero if successful, or a negative error code.
1116 int snd_pcm_stop_xrun(struct snd_pcm_substream
*substream
)
1118 unsigned long flags
;
1121 snd_pcm_stream_lock_irqsave(substream
, flags
);
1122 if (snd_pcm_running(substream
))
1123 ret
= snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
1124 snd_pcm_stream_unlock_irqrestore(substream
, flags
);
1127 EXPORT_SYMBOL_GPL(snd_pcm_stop_xrun
);
1132 static int snd_pcm_pre_pause(struct snd_pcm_substream
*substream
, int push
)
1134 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1135 if (!(runtime
->info
& SNDRV_PCM_INFO_PAUSE
))
1138 if (runtime
->status
->state
!= SNDRV_PCM_STATE_RUNNING
)
1140 } else if (runtime
->status
->state
!= SNDRV_PCM_STATE_PAUSED
)
1142 runtime
->trigger_master
= substream
;
1146 static int snd_pcm_do_pause(struct snd_pcm_substream
*substream
, int push
)
1148 if (substream
->runtime
->trigger_master
!= substream
)
1150 /* some drivers might use hw_ptr to recover from the pause -
1151 update the hw_ptr now */
1153 snd_pcm_update_hw_ptr(substream
);
1154 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1155 * a delta between the current jiffies, this gives a large enough
1156 * delta, effectively to skip the check once.
1158 substream
->runtime
->hw_ptr_jiffies
= jiffies
- HZ
* 1000;
1159 return substream
->ops
->trigger(substream
,
1160 push
? SNDRV_PCM_TRIGGER_PAUSE_PUSH
:
1161 SNDRV_PCM_TRIGGER_PAUSE_RELEASE
);
1164 static void snd_pcm_undo_pause(struct snd_pcm_substream
*substream
, int push
)
1166 if (substream
->runtime
->trigger_master
== substream
)
1167 substream
->ops
->trigger(substream
,
1168 push
? SNDRV_PCM_TRIGGER_PAUSE_RELEASE
:
1169 SNDRV_PCM_TRIGGER_PAUSE_PUSH
);
1172 static void snd_pcm_post_pause(struct snd_pcm_substream
*substream
, int push
)
1174 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1175 snd_pcm_trigger_tstamp(substream
);
1177 runtime
->status
->state
= SNDRV_PCM_STATE_PAUSED
;
1178 if (substream
->timer
)
1179 snd_timer_notify(substream
->timer
,
1180 SNDRV_TIMER_EVENT_MPAUSE
,
1181 &runtime
->trigger_tstamp
);
1182 wake_up(&runtime
->sleep
);
1183 wake_up(&runtime
->tsleep
);
1185 runtime
->status
->state
= SNDRV_PCM_STATE_RUNNING
;
1186 if (substream
->timer
)
1187 snd_timer_notify(substream
->timer
,
1188 SNDRV_TIMER_EVENT_MCONTINUE
,
1189 &runtime
->trigger_tstamp
);
1193 static struct action_ops snd_pcm_action_pause
= {
1194 .pre_action
= snd_pcm_pre_pause
,
1195 .do_action
= snd_pcm_do_pause
,
1196 .undo_action
= snd_pcm_undo_pause
,
1197 .post_action
= snd_pcm_post_pause
1201 * Push/release the pause for all linked streams.
1203 static int snd_pcm_pause(struct snd_pcm_substream
*substream
, int push
)
1205 return snd_pcm_action(&snd_pcm_action_pause
, substream
, push
);
1211 static int snd_pcm_pre_suspend(struct snd_pcm_substream
*substream
, int state
)
1213 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1214 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1216 runtime
->trigger_master
= substream
;
1220 static int snd_pcm_do_suspend(struct snd_pcm_substream
*substream
, int state
)
1222 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1223 if (runtime
->trigger_master
!= substream
)
1225 if (! snd_pcm_running(substream
))
1227 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1228 return 0; /* suspend unconditionally */
1231 static void snd_pcm_post_suspend(struct snd_pcm_substream
*substream
, int state
)
1233 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1234 snd_pcm_trigger_tstamp(substream
);
1235 runtime
->status
->suspended_state
= runtime
->status
->state
;
1236 runtime
->status
->state
= SNDRV_PCM_STATE_SUSPENDED
;
1237 if (substream
->timer
)
1238 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MSUSPEND
,
1239 &runtime
->trigger_tstamp
);
1240 wake_up(&runtime
->sleep
);
1241 wake_up(&runtime
->tsleep
);
1244 static struct action_ops snd_pcm_action_suspend
= {
1245 .pre_action
= snd_pcm_pre_suspend
,
1246 .do_action
= snd_pcm_do_suspend
,
1247 .post_action
= snd_pcm_post_suspend
1251 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1252 * @substream: the PCM substream
1254 * After this call, all streams are changed to SUSPENDED state.
1256 * Return: Zero if successful (or @substream is %NULL), or a negative error
1259 int snd_pcm_suspend(struct snd_pcm_substream
*substream
)
1262 unsigned long flags
;
1267 snd_pcm_stream_lock_irqsave(substream
, flags
);
1268 err
= snd_pcm_action(&snd_pcm_action_suspend
, substream
, 0);
1269 snd_pcm_stream_unlock_irqrestore(substream
, flags
);
1273 EXPORT_SYMBOL(snd_pcm_suspend
);
1276 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1277 * @pcm: the PCM instance
1279 * After this call, all streams are changed to SUSPENDED state.
1281 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1283 int snd_pcm_suspend_all(struct snd_pcm
*pcm
)
1285 struct snd_pcm_substream
*substream
;
1286 int stream
, err
= 0;
1291 for (stream
= 0; stream
< 2; stream
++) {
1292 for (substream
= pcm
->streams
[stream
].substream
;
1293 substream
; substream
= substream
->next
) {
1294 /* FIXME: the open/close code should lock this as well */
1295 if (substream
->runtime
== NULL
)
1297 err
= snd_pcm_suspend(substream
);
1298 if (err
< 0 && err
!= -EBUSY
)
1305 EXPORT_SYMBOL(snd_pcm_suspend_all
);
1309 static int snd_pcm_pre_resume(struct snd_pcm_substream
*substream
, int state
)
1311 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1312 if (!(runtime
->info
& SNDRV_PCM_INFO_RESUME
))
1314 runtime
->trigger_master
= substream
;
1318 static int snd_pcm_do_resume(struct snd_pcm_substream
*substream
, int state
)
1320 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1321 if (runtime
->trigger_master
!= substream
)
1323 /* DMA not running previously? */
1324 if (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_RUNNING
&&
1325 (runtime
->status
->suspended_state
!= SNDRV_PCM_STATE_DRAINING
||
1326 substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
1328 return substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_RESUME
);
1331 static void snd_pcm_undo_resume(struct snd_pcm_substream
*substream
, int state
)
1333 if (substream
->runtime
->trigger_master
== substream
&&
1334 snd_pcm_running(substream
))
1335 substream
->ops
->trigger(substream
, SNDRV_PCM_TRIGGER_SUSPEND
);
1338 static void snd_pcm_post_resume(struct snd_pcm_substream
*substream
, int state
)
1340 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1341 snd_pcm_trigger_tstamp(substream
);
1342 runtime
->status
->state
= runtime
->status
->suspended_state
;
1343 if (substream
->timer
)
1344 snd_timer_notify(substream
->timer
, SNDRV_TIMER_EVENT_MRESUME
,
1345 &runtime
->trigger_tstamp
);
1348 static struct action_ops snd_pcm_action_resume
= {
1349 .pre_action
= snd_pcm_pre_resume
,
1350 .do_action
= snd_pcm_do_resume
,
1351 .undo_action
= snd_pcm_undo_resume
,
1352 .post_action
= snd_pcm_post_resume
1355 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1357 struct snd_card
*card
= substream
->pcm
->card
;
1360 snd_power_lock(card
);
1361 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1362 res
= snd_pcm_action_lock_irq(&snd_pcm_action_resume
, substream
, 0);
1363 snd_power_unlock(card
);
1369 static int snd_pcm_resume(struct snd_pcm_substream
*substream
)
1374 #endif /* CONFIG_PM */
1379 * Change the RUNNING stream(s) to XRUN state.
1381 static int snd_pcm_xrun(struct snd_pcm_substream
*substream
)
1383 struct snd_card
*card
= substream
->pcm
->card
;
1384 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1387 snd_power_lock(card
);
1388 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1389 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1394 snd_pcm_stream_lock_irq(substream
);
1395 switch (runtime
->status
->state
) {
1396 case SNDRV_PCM_STATE_XRUN
:
1397 result
= 0; /* already there */
1399 case SNDRV_PCM_STATE_RUNNING
:
1400 result
= snd_pcm_stop(substream
, SNDRV_PCM_STATE_XRUN
);
1405 snd_pcm_stream_unlock_irq(substream
);
1407 snd_power_unlock(card
);
1414 static int snd_pcm_pre_reset(struct snd_pcm_substream
*substream
, int state
)
1416 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1417 switch (runtime
->status
->state
) {
1418 case SNDRV_PCM_STATE_RUNNING
:
1419 case SNDRV_PCM_STATE_PREPARED
:
1420 case SNDRV_PCM_STATE_PAUSED
:
1421 case SNDRV_PCM_STATE_SUSPENDED
:
1428 static int snd_pcm_do_reset(struct snd_pcm_substream
*substream
, int state
)
1430 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1431 int err
= substream
->ops
->ioctl(substream
, SNDRV_PCM_IOCTL1_RESET
, NULL
);
1434 runtime
->hw_ptr_base
= 0;
1435 runtime
->hw_ptr_interrupt
= runtime
->status
->hw_ptr
-
1436 runtime
->status
->hw_ptr
% runtime
->period_size
;
1437 runtime
->silence_start
= runtime
->status
->hw_ptr
;
1438 runtime
->silence_filled
= 0;
1442 static void snd_pcm_post_reset(struct snd_pcm_substream
*substream
, int state
)
1444 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1445 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1446 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
&&
1447 runtime
->silence_size
> 0)
1448 snd_pcm_playback_silence(substream
, ULONG_MAX
);
1451 static struct action_ops snd_pcm_action_reset
= {
1452 .pre_action
= snd_pcm_pre_reset
,
1453 .do_action
= snd_pcm_do_reset
,
1454 .post_action
= snd_pcm_post_reset
1457 static int snd_pcm_reset(struct snd_pcm_substream
*substream
)
1459 return snd_pcm_action_nonatomic(&snd_pcm_action_reset
, substream
, 0);
1465 /* we use the second argument for updating f_flags */
1466 static int snd_pcm_pre_prepare(struct snd_pcm_substream
*substream
,
1469 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1470 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1471 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
)
1473 if (snd_pcm_running(substream
))
1475 substream
->f_flags
= f_flags
;
1479 static int snd_pcm_do_prepare(struct snd_pcm_substream
*substream
, int state
)
1482 err
= substream
->ops
->prepare(substream
);
1485 return snd_pcm_do_reset(substream
, 0);
1488 static void snd_pcm_post_prepare(struct snd_pcm_substream
*substream
, int state
)
1490 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1491 runtime
->control
->appl_ptr
= runtime
->status
->hw_ptr
;
1492 snd_pcm_set_state(substream
, SNDRV_PCM_STATE_PREPARED
);
1495 static struct action_ops snd_pcm_action_prepare
= {
1496 .pre_action
= snd_pcm_pre_prepare
,
1497 .do_action
= snd_pcm_do_prepare
,
1498 .post_action
= snd_pcm_post_prepare
1502 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1503 * @substream: the PCM substream instance
1504 * @file: file to refer f_flags
1506 * Return: Zero if successful, or a negative error code.
1508 static int snd_pcm_prepare(struct snd_pcm_substream
*substream
,
1512 struct snd_card
*card
= substream
->pcm
->card
;
1516 f_flags
= file
->f_flags
;
1518 f_flags
= substream
->f_flags
;
1520 snd_power_lock(card
);
1521 if ((res
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
)) >= 0)
1522 res
= snd_pcm_action_nonatomic(&snd_pcm_action_prepare
,
1523 substream
, f_flags
);
1524 snd_power_unlock(card
);
1532 static int snd_pcm_pre_drain_init(struct snd_pcm_substream
*substream
, int state
)
1534 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1535 switch (runtime
->status
->state
) {
1536 case SNDRV_PCM_STATE_OPEN
:
1537 case SNDRV_PCM_STATE_DISCONNECTED
:
1538 case SNDRV_PCM_STATE_SUSPENDED
:
1541 runtime
->trigger_master
= substream
;
1545 static int snd_pcm_do_drain_init(struct snd_pcm_substream
*substream
, int state
)
1547 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1548 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
1549 switch (runtime
->status
->state
) {
1550 case SNDRV_PCM_STATE_PREPARED
:
1551 /* start playback stream if possible */
1552 if (! snd_pcm_playback_empty(substream
)) {
1553 snd_pcm_do_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1554 snd_pcm_post_start(substream
, SNDRV_PCM_STATE_DRAINING
);
1556 runtime
->status
->state
= SNDRV_PCM_STATE_SETUP
;
1559 case SNDRV_PCM_STATE_RUNNING
:
1560 runtime
->status
->state
= SNDRV_PCM_STATE_DRAINING
;
1562 case SNDRV_PCM_STATE_XRUN
:
1563 runtime
->status
->state
= SNDRV_PCM_STATE_SETUP
;
1569 /* stop running stream */
1570 if (runtime
->status
->state
== SNDRV_PCM_STATE_RUNNING
) {
1571 int new_state
= snd_pcm_capture_avail(runtime
) > 0 ?
1572 SNDRV_PCM_STATE_DRAINING
: SNDRV_PCM_STATE_SETUP
;
1573 snd_pcm_do_stop(substream
, new_state
);
1574 snd_pcm_post_stop(substream
, new_state
);
1578 if (runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
&&
1579 runtime
->trigger_master
== substream
&&
1580 (runtime
->hw
.info
& SNDRV_PCM_INFO_DRAIN_TRIGGER
))
1581 return substream
->ops
->trigger(substream
,
1582 SNDRV_PCM_TRIGGER_DRAIN
);
1587 static void snd_pcm_post_drain_init(struct snd_pcm_substream
*substream
, int state
)
1591 static struct action_ops snd_pcm_action_drain_init
= {
1592 .pre_action
= snd_pcm_pre_drain_init
,
1593 .do_action
= snd_pcm_do_drain_init
,
1594 .post_action
= snd_pcm_post_drain_init
1597 static int snd_pcm_drop(struct snd_pcm_substream
*substream
);
1600 * Drain the stream(s).
1601 * When the substream is linked, sync until the draining of all playback streams
1603 * After this call, all streams are supposed to be either SETUP or DRAINING
1604 * (capture only) state.
1606 static int snd_pcm_drain(struct snd_pcm_substream
*substream
,
1609 struct snd_card
*card
;
1610 struct snd_pcm_runtime
*runtime
;
1611 struct snd_pcm_substream
*s
;
1616 card
= substream
->pcm
->card
;
1617 runtime
= substream
->runtime
;
1619 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
1622 snd_power_lock(card
);
1623 if (runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
) {
1624 result
= snd_power_wait(card
, SNDRV_CTL_POWER_D0
);
1626 snd_power_unlock(card
);
1632 if (file
->f_flags
& O_NONBLOCK
)
1634 } else if (substream
->f_flags
& O_NONBLOCK
)
1637 down_read(&snd_pcm_link_rwsem
);
1638 snd_pcm_stream_lock_irq(substream
);
1640 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1641 snd_pcm_pause(substream
, 0);
1643 /* pre-start/stop - all running streams are changed to DRAINING state */
1644 result
= snd_pcm_action(&snd_pcm_action_drain_init
, substream
, 0);
1647 /* in non-blocking, we don't wait in ioctl but let caller poll */
1655 struct snd_pcm_runtime
*to_check
;
1656 if (signal_pending(current
)) {
1657 result
= -ERESTARTSYS
;
1660 /* find a substream to drain */
1662 snd_pcm_group_for_each_entry(s
, substream
) {
1663 if (s
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
)
1665 runtime
= s
->runtime
;
1666 if (runtime
->status
->state
== SNDRV_PCM_STATE_DRAINING
) {
1672 break; /* all drained */
1673 init_waitqueue_entry(&wait
, current
);
1674 add_wait_queue(&to_check
->sleep
, &wait
);
1675 snd_pcm_stream_unlock_irq(substream
);
1676 up_read(&snd_pcm_link_rwsem
);
1677 snd_power_unlock(card
);
1678 if (runtime
->no_period_wakeup
)
1679 tout
= MAX_SCHEDULE_TIMEOUT
;
1682 if (runtime
->rate
) {
1683 long t
= runtime
->period_size
* 2 / runtime
->rate
;
1684 tout
= max(t
, tout
);
1686 tout
= msecs_to_jiffies(tout
* 1000);
1688 tout
= schedule_timeout_interruptible(tout
);
1689 snd_power_lock(card
);
1690 down_read(&snd_pcm_link_rwsem
);
1691 snd_pcm_stream_lock_irq(substream
);
1692 remove_wait_queue(&to_check
->sleep
, &wait
);
1693 if (card
->shutdown
) {
1698 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1701 dev_dbg(substream
->pcm
->card
->dev
,
1702 "playback drain error (DMA or IRQ trouble?)\n");
1703 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1711 snd_pcm_stream_unlock_irq(substream
);
1712 up_read(&snd_pcm_link_rwsem
);
1713 snd_power_unlock(card
);
1721 * Immediately put all linked substreams into SETUP state.
1723 static int snd_pcm_drop(struct snd_pcm_substream
*substream
)
1725 struct snd_pcm_runtime
*runtime
;
1728 if (PCM_RUNTIME_CHECK(substream
))
1730 runtime
= substream
->runtime
;
1732 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1733 runtime
->status
->state
== SNDRV_PCM_STATE_DISCONNECTED
||
1734 runtime
->status
->state
== SNDRV_PCM_STATE_SUSPENDED
)
1737 snd_pcm_stream_lock_irq(substream
);
1739 if (runtime
->status
->state
== SNDRV_PCM_STATE_PAUSED
)
1740 snd_pcm_pause(substream
, 0);
1742 snd_pcm_stop(substream
, SNDRV_PCM_STATE_SETUP
);
1743 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1744 snd_pcm_stream_unlock_irq(substream
);
1750 static bool is_pcm_file(struct file
*file
)
1752 struct inode
*inode
= file_inode(file
);
1755 if (!S_ISCHR(inode
->i_mode
) || imajor(inode
) != snd_major
)
1757 minor
= iminor(inode
);
1758 return snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_PLAYBACK
) ||
1759 snd_lookup_minor_data(minor
, SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
1765 static int snd_pcm_link(struct snd_pcm_substream
*substream
, int fd
)
1768 struct snd_pcm_file
*pcm_file
;
1769 struct snd_pcm_substream
*substream1
;
1770 struct snd_pcm_group
*group
;
1771 struct fd f
= fdget(fd
);
1775 if (!is_pcm_file(f
.file
)) {
1779 pcm_file
= f
.file
->private_data
;
1780 substream1
= pcm_file
->substream
;
1781 group
= kmalloc(sizeof(*group
), GFP_KERNEL
);
1786 down_write(&snd_pcm_link_rwsem
);
1787 write_lock_irq(&snd_pcm_link_rwlock
);
1788 if (substream
->runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
||
1789 substream
->runtime
->status
->state
!= substream1
->runtime
->status
->state
||
1790 substream
->pcm
->nonatomic
!= substream1
->pcm
->nonatomic
) {
1794 if (snd_pcm_stream_linked(substream1
)) {
1798 if (!snd_pcm_stream_linked(substream
)) {
1799 substream
->group
= group
;
1801 spin_lock_init(&substream
->group
->lock
);
1802 mutex_init(&substream
->group
->mutex
);
1803 INIT_LIST_HEAD(&substream
->group
->substreams
);
1804 list_add_tail(&substream
->link_list
, &substream
->group
->substreams
);
1805 substream
->group
->count
= 1;
1807 list_add_tail(&substream1
->link_list
, &substream
->group
->substreams
);
1808 substream
->group
->count
++;
1809 substream1
->group
= substream
->group
;
1811 write_unlock_irq(&snd_pcm_link_rwlock
);
1812 up_write(&snd_pcm_link_rwsem
);
1814 snd_card_unref(substream1
->pcm
->card
);
1821 static void relink_to_local(struct snd_pcm_substream
*substream
)
1823 substream
->group
= &substream
->self_group
;
1824 INIT_LIST_HEAD(&substream
->self_group
.substreams
);
1825 list_add_tail(&substream
->link_list
, &substream
->self_group
.substreams
);
1828 static int snd_pcm_unlink(struct snd_pcm_substream
*substream
)
1830 struct snd_pcm_substream
*s
;
1833 down_write(&snd_pcm_link_rwsem
);
1834 write_lock_irq(&snd_pcm_link_rwlock
);
1835 if (!snd_pcm_stream_linked(substream
)) {
1839 list_del(&substream
->link_list
);
1840 substream
->group
->count
--;
1841 if (substream
->group
->count
== 1) { /* detach the last stream, too */
1842 snd_pcm_group_for_each_entry(s
, substream
) {
1846 kfree(substream
->group
);
1848 relink_to_local(substream
);
1850 write_unlock_irq(&snd_pcm_link_rwlock
);
1851 up_write(&snd_pcm_link_rwsem
);
1858 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params
*params
,
1859 struct snd_pcm_hw_rule
*rule
)
1861 struct snd_interval t
;
1862 snd_interval_mul(hw_param_interval_c(params
, rule
->deps
[0]),
1863 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1864 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1867 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params
*params
,
1868 struct snd_pcm_hw_rule
*rule
)
1870 struct snd_interval t
;
1871 snd_interval_div(hw_param_interval_c(params
, rule
->deps
[0]),
1872 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1873 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1876 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params
*params
,
1877 struct snd_pcm_hw_rule
*rule
)
1879 struct snd_interval t
;
1880 snd_interval_muldivk(hw_param_interval_c(params
, rule
->deps
[0]),
1881 hw_param_interval_c(params
, rule
->deps
[1]),
1882 (unsigned long) rule
->private, &t
);
1883 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1886 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params
*params
,
1887 struct snd_pcm_hw_rule
*rule
)
1889 struct snd_interval t
;
1890 snd_interval_mulkdiv(hw_param_interval_c(params
, rule
->deps
[0]),
1891 (unsigned long) rule
->private,
1892 hw_param_interval_c(params
, rule
->deps
[1]), &t
);
1893 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1896 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params
*params
,
1897 struct snd_pcm_hw_rule
*rule
)
1900 struct snd_interval
*i
= hw_param_interval(params
, rule
->deps
[0]);
1902 struct snd_mask
*mask
= hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
);
1904 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1906 if (! snd_mask_test(mask
, k
))
1908 bits
= snd_pcm_format_physical_width(k
);
1910 continue; /* ignore invalid formats */
1911 if ((unsigned)bits
< i
->min
|| (unsigned)bits
> i
->max
)
1912 snd_mask_reset(&m
, k
);
1914 return snd_mask_refine(mask
, &m
);
1917 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params
*params
,
1918 struct snd_pcm_hw_rule
*rule
)
1920 struct snd_interval t
;
1926 for (k
= 0; k
<= SNDRV_PCM_FORMAT_LAST
; ++k
) {
1928 if (! snd_mask_test(hw_param_mask(params
, SNDRV_PCM_HW_PARAM_FORMAT
), k
))
1930 bits
= snd_pcm_format_physical_width(k
);
1932 continue; /* ignore invalid formats */
1933 if (t
.min
> (unsigned)bits
)
1935 if (t
.max
< (unsigned)bits
)
1939 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1942 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1943 #error "Change this table"
1946 static unsigned int rates
[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1947 48000, 64000, 88200, 96000, 176400, 192000 };
1949 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates
= {
1950 .count
= ARRAY_SIZE(rates
),
1954 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params
*params
,
1955 struct snd_pcm_hw_rule
*rule
)
1957 struct snd_pcm_hardware
*hw
= rule
->private;
1958 return snd_interval_list(hw_param_interval(params
, rule
->var
),
1959 snd_pcm_known_rates
.count
,
1960 snd_pcm_known_rates
.list
, hw
->rates
);
1963 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params
*params
,
1964 struct snd_pcm_hw_rule
*rule
)
1966 struct snd_interval t
;
1967 struct snd_pcm_substream
*substream
= rule
->private;
1969 t
.max
= substream
->buffer_bytes_max
;
1973 return snd_interval_refine(hw_param_interval(params
, rule
->var
), &t
);
1976 int snd_pcm_hw_constraints_init(struct snd_pcm_substream
*substream
)
1978 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
1979 struct snd_pcm_hw_constraints
*constrs
= &runtime
->hw_constraints
;
1982 for (k
= SNDRV_PCM_HW_PARAM_FIRST_MASK
; k
<= SNDRV_PCM_HW_PARAM_LAST_MASK
; k
++) {
1983 snd_mask_any(constrs_mask(constrs
, k
));
1986 for (k
= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL
; k
<= SNDRV_PCM_HW_PARAM_LAST_INTERVAL
; k
++) {
1987 snd_interval_any(constrs_interval(constrs
, k
));
1990 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_CHANNELS
));
1991 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
));
1992 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
));
1993 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
));
1994 snd_interval_setinteger(constrs_interval(constrs
, SNDRV_PCM_HW_PARAM_FRAME_BITS
));
1996 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FORMAT
,
1997 snd_pcm_hw_rule_format
, NULL
,
1998 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
2001 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
2002 snd_pcm_hw_rule_sample_bits
, NULL
,
2003 SNDRV_PCM_HW_PARAM_FORMAT
,
2004 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
2007 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
,
2008 snd_pcm_hw_rule_div
, NULL
,
2009 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
2012 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
2013 snd_pcm_hw_rule_mul
, NULL
,
2014 SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, SNDRV_PCM_HW_PARAM_CHANNELS
, -1);
2017 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
2018 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
2019 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
2022 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS
,
2023 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
2024 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, -1);
2027 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_CHANNELS
,
2028 snd_pcm_hw_rule_div
, NULL
,
2029 SNDRV_PCM_HW_PARAM_FRAME_BITS
, SNDRV_PCM_HW_PARAM_SAMPLE_BITS
, -1);
2032 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
2033 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
2034 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_TIME
, -1);
2037 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
2038 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
2039 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_BUFFER_TIME
, -1);
2042 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIODS
,
2043 snd_pcm_hw_rule_div
, NULL
,
2044 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, -1);
2047 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
2048 snd_pcm_hw_rule_div
, NULL
,
2049 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
2052 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
2053 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
2054 SNDRV_PCM_HW_PARAM_PERIOD_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
2057 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
,
2058 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
2059 SNDRV_PCM_HW_PARAM_PERIOD_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
2062 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
2063 snd_pcm_hw_rule_mul
, NULL
,
2064 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_PERIODS
, -1);
2067 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
2068 snd_pcm_hw_rule_mulkdiv
, (void*) 8,
2069 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
2072 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE
,
2073 snd_pcm_hw_rule_muldivk
, (void*) 1000000,
2074 SNDRV_PCM_HW_PARAM_BUFFER_TIME
, SNDRV_PCM_HW_PARAM_RATE
, -1);
2077 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
2078 snd_pcm_hw_rule_muldivk
, (void*) 8,
2079 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
2082 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
2083 snd_pcm_hw_rule_muldivk
, (void*) 8,
2084 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_FRAME_BITS
, -1);
2087 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME
,
2088 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
2089 SNDRV_PCM_HW_PARAM_PERIOD_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
2092 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME
,
2093 snd_pcm_hw_rule_mulkdiv
, (void*) 1000000,
2094 SNDRV_PCM_HW_PARAM_BUFFER_SIZE
, SNDRV_PCM_HW_PARAM_RATE
, -1);
2100 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream
*substream
)
2102 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2103 struct snd_pcm_hardware
*hw
= &runtime
->hw
;
2105 unsigned int mask
= 0;
2107 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
2108 mask
|= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED
;
2109 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
2110 mask
|= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
;
2111 if (hw_support_mmap(substream
)) {
2112 if (hw
->info
& SNDRV_PCM_INFO_INTERLEAVED
)
2113 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED
;
2114 if (hw
->info
& SNDRV_PCM_INFO_NONINTERLEAVED
)
2115 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED
;
2116 if (hw
->info
& SNDRV_PCM_INFO_COMPLEX
)
2117 mask
|= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX
;
2119 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_ACCESS
, mask
);
2123 err
= snd_pcm_hw_constraint_mask64(runtime
, SNDRV_PCM_HW_PARAM_FORMAT
, hw
->formats
);
2127 err
= snd_pcm_hw_constraint_mask(runtime
, SNDRV_PCM_HW_PARAM_SUBFORMAT
, 1 << SNDRV_PCM_SUBFORMAT_STD
);
2131 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_CHANNELS
,
2132 hw
->channels_min
, hw
->channels_max
);
2136 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_RATE
,
2137 hw
->rate_min
, hw
->rate_max
);
2141 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_BYTES
,
2142 hw
->period_bytes_min
, hw
->period_bytes_max
);
2146 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_PERIODS
,
2147 hw
->periods_min
, hw
->periods_max
);
2151 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
2152 hw
->period_bytes_min
, hw
->buffer_bytes_max
);
2156 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
,
2157 snd_pcm_hw_rule_buffer_bytes_max
, substream
,
2158 SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, -1);
2163 if (runtime
->dma_bytes
) {
2164 err
= snd_pcm_hw_constraint_minmax(runtime
, SNDRV_PCM_HW_PARAM_BUFFER_BYTES
, 0, runtime
->dma_bytes
);
2169 if (!(hw
->rates
& (SNDRV_PCM_RATE_KNOT
| SNDRV_PCM_RATE_CONTINUOUS
))) {
2170 err
= snd_pcm_hw_rule_add(runtime
, 0, SNDRV_PCM_HW_PARAM_RATE
,
2171 snd_pcm_hw_rule_rate
, hw
,
2172 SNDRV_PCM_HW_PARAM_RATE
, -1);
2177 /* FIXME: this belong to lowlevel */
2178 snd_pcm_hw_constraint_integer(runtime
, SNDRV_PCM_HW_PARAM_PERIOD_SIZE
);
2183 static void pcm_release_private(struct snd_pcm_substream
*substream
)
2185 snd_pcm_unlink(substream
);
2188 void snd_pcm_release_substream(struct snd_pcm_substream
*substream
)
2190 substream
->ref_count
--;
2191 if (substream
->ref_count
> 0)
2194 snd_pcm_drop(substream
);
2195 if (substream
->hw_opened
) {
2196 if (substream
->ops
->hw_free
!= NULL
)
2197 substream
->ops
->hw_free(substream
);
2198 substream
->ops
->close(substream
);
2199 substream
->hw_opened
= 0;
2201 if (pm_qos_request_active(&substream
->latency_pm_qos_req
))
2202 pm_qos_remove_request(&substream
->latency_pm_qos_req
);
2203 if (substream
->pcm_release
) {
2204 substream
->pcm_release(substream
);
2205 substream
->pcm_release
= NULL
;
2207 snd_pcm_detach_substream(substream
);
2210 EXPORT_SYMBOL(snd_pcm_release_substream
);
2212 int snd_pcm_open_substream(struct snd_pcm
*pcm
, int stream
,
2214 struct snd_pcm_substream
**rsubstream
)
2216 struct snd_pcm_substream
*substream
;
2219 err
= snd_pcm_attach_substream(pcm
, stream
, file
, &substream
);
2222 if (substream
->ref_count
> 1) {
2223 *rsubstream
= substream
;
2227 err
= snd_pcm_hw_constraints_init(substream
);
2229 pcm_dbg(pcm
, "snd_pcm_hw_constraints_init failed\n");
2233 if ((err
= substream
->ops
->open(substream
)) < 0)
2236 substream
->hw_opened
= 1;
2238 err
= snd_pcm_hw_constraints_complete(substream
);
2240 pcm_dbg(pcm
, "snd_pcm_hw_constraints_complete failed\n");
2244 *rsubstream
= substream
;
2248 snd_pcm_release_substream(substream
);
2252 EXPORT_SYMBOL(snd_pcm_open_substream
);
2254 static int snd_pcm_open_file(struct file
*file
,
2255 struct snd_pcm
*pcm
,
2258 struct snd_pcm_file
*pcm_file
;
2259 struct snd_pcm_substream
*substream
;
2262 err
= snd_pcm_open_substream(pcm
, stream
, file
, &substream
);
2266 pcm_file
= kzalloc(sizeof(*pcm_file
), GFP_KERNEL
);
2267 if (pcm_file
== NULL
) {
2268 snd_pcm_release_substream(substream
);
2271 pcm_file
->substream
= substream
;
2272 if (substream
->ref_count
== 1) {
2273 substream
->file
= pcm_file
;
2274 substream
->pcm_release
= pcm_release_private
;
2276 file
->private_data
= pcm_file
;
2281 static int snd_pcm_playback_open(struct inode
*inode
, struct file
*file
)
2283 struct snd_pcm
*pcm
;
2284 int err
= nonseekable_open(inode
, file
);
2287 pcm
= snd_lookup_minor_data(iminor(inode
),
2288 SNDRV_DEVICE_TYPE_PCM_PLAYBACK
);
2289 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_PLAYBACK
);
2291 snd_card_unref(pcm
->card
);
2295 static int snd_pcm_capture_open(struct inode
*inode
, struct file
*file
)
2297 struct snd_pcm
*pcm
;
2298 int err
= nonseekable_open(inode
, file
);
2301 pcm
= snd_lookup_minor_data(iminor(inode
),
2302 SNDRV_DEVICE_TYPE_PCM_CAPTURE
);
2303 err
= snd_pcm_open(file
, pcm
, SNDRV_PCM_STREAM_CAPTURE
);
2305 snd_card_unref(pcm
->card
);
2309 static int snd_pcm_open(struct file
*file
, struct snd_pcm
*pcm
, int stream
)
2318 err
= snd_card_file_add(pcm
->card
, file
);
2321 if (!try_module_get(pcm
->card
->module
)) {
2325 init_waitqueue_entry(&wait
, current
);
2326 add_wait_queue(&pcm
->open_wait
, &wait
);
2327 mutex_lock(&pcm
->open_mutex
);
2329 err
= snd_pcm_open_file(file
, pcm
, stream
);
2332 if (err
== -EAGAIN
) {
2333 if (file
->f_flags
& O_NONBLOCK
) {
2339 set_current_state(TASK_INTERRUPTIBLE
);
2340 mutex_unlock(&pcm
->open_mutex
);
2342 mutex_lock(&pcm
->open_mutex
);
2343 if (pcm
->card
->shutdown
) {
2347 if (signal_pending(current
)) {
2352 remove_wait_queue(&pcm
->open_wait
, &wait
);
2353 mutex_unlock(&pcm
->open_mutex
);
2359 module_put(pcm
->card
->module
);
2361 snd_card_file_remove(pcm
->card
, file
);
2366 static int snd_pcm_release(struct inode
*inode
, struct file
*file
)
2368 struct snd_pcm
*pcm
;
2369 struct snd_pcm_substream
*substream
;
2370 struct snd_pcm_file
*pcm_file
;
2372 pcm_file
= file
->private_data
;
2373 substream
= pcm_file
->substream
;
2374 if (snd_BUG_ON(!substream
))
2376 pcm
= substream
->pcm
;
2377 mutex_lock(&pcm
->open_mutex
);
2378 snd_pcm_release_substream(substream
);
2380 mutex_unlock(&pcm
->open_mutex
);
2381 wake_up(&pcm
->open_wait
);
2382 module_put(pcm
->card
->module
);
2383 snd_card_file_remove(pcm
->card
, file
);
2387 static snd_pcm_sframes_t
snd_pcm_playback_rewind(struct snd_pcm_substream
*substream
,
2388 snd_pcm_uframes_t frames
)
2390 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2391 snd_pcm_sframes_t appl_ptr
;
2392 snd_pcm_sframes_t ret
;
2393 snd_pcm_sframes_t hw_avail
;
2398 snd_pcm_stream_lock_irq(substream
);
2399 switch (runtime
->status
->state
) {
2400 case SNDRV_PCM_STATE_PREPARED
:
2402 case SNDRV_PCM_STATE_DRAINING
:
2403 case SNDRV_PCM_STATE_RUNNING
:
2404 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2407 case SNDRV_PCM_STATE_XRUN
:
2410 case SNDRV_PCM_STATE_SUSPENDED
:
2418 hw_avail
= snd_pcm_playback_hw_avail(runtime
);
2419 if (hw_avail
<= 0) {
2423 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2425 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2427 appl_ptr
+= runtime
->boundary
;
2428 runtime
->control
->appl_ptr
= appl_ptr
;
2431 snd_pcm_stream_unlock_irq(substream
);
2435 static snd_pcm_sframes_t
snd_pcm_capture_rewind(struct snd_pcm_substream
*substream
,
2436 snd_pcm_uframes_t frames
)
2438 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2439 snd_pcm_sframes_t appl_ptr
;
2440 snd_pcm_sframes_t ret
;
2441 snd_pcm_sframes_t hw_avail
;
2446 snd_pcm_stream_lock_irq(substream
);
2447 switch (runtime
->status
->state
) {
2448 case SNDRV_PCM_STATE_PREPARED
:
2449 case SNDRV_PCM_STATE_DRAINING
:
2451 case SNDRV_PCM_STATE_RUNNING
:
2452 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2455 case SNDRV_PCM_STATE_XRUN
:
2458 case SNDRV_PCM_STATE_SUSPENDED
:
2466 hw_avail
= snd_pcm_capture_hw_avail(runtime
);
2467 if (hw_avail
<= 0) {
2471 if (frames
> (snd_pcm_uframes_t
)hw_avail
)
2473 appl_ptr
= runtime
->control
->appl_ptr
- frames
;
2475 appl_ptr
+= runtime
->boundary
;
2476 runtime
->control
->appl_ptr
= appl_ptr
;
2479 snd_pcm_stream_unlock_irq(substream
);
2483 static snd_pcm_sframes_t
snd_pcm_playback_forward(struct snd_pcm_substream
*substream
,
2484 snd_pcm_uframes_t frames
)
2486 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2487 snd_pcm_sframes_t appl_ptr
;
2488 snd_pcm_sframes_t ret
;
2489 snd_pcm_sframes_t avail
;
2494 snd_pcm_stream_lock_irq(substream
);
2495 switch (runtime
->status
->state
) {
2496 case SNDRV_PCM_STATE_PREPARED
:
2497 case SNDRV_PCM_STATE_PAUSED
:
2499 case SNDRV_PCM_STATE_DRAINING
:
2500 case SNDRV_PCM_STATE_RUNNING
:
2501 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2504 case SNDRV_PCM_STATE_XRUN
:
2507 case SNDRV_PCM_STATE_SUSPENDED
:
2515 avail
= snd_pcm_playback_avail(runtime
);
2520 if (frames
> (snd_pcm_uframes_t
)avail
)
2522 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2523 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2524 appl_ptr
-= runtime
->boundary
;
2525 runtime
->control
->appl_ptr
= appl_ptr
;
2528 snd_pcm_stream_unlock_irq(substream
);
2532 static snd_pcm_sframes_t
snd_pcm_capture_forward(struct snd_pcm_substream
*substream
,
2533 snd_pcm_uframes_t frames
)
2535 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2536 snd_pcm_sframes_t appl_ptr
;
2537 snd_pcm_sframes_t ret
;
2538 snd_pcm_sframes_t avail
;
2543 snd_pcm_stream_lock_irq(substream
);
2544 switch (runtime
->status
->state
) {
2545 case SNDRV_PCM_STATE_PREPARED
:
2546 case SNDRV_PCM_STATE_DRAINING
:
2547 case SNDRV_PCM_STATE_PAUSED
:
2549 case SNDRV_PCM_STATE_RUNNING
:
2550 if (snd_pcm_update_hw_ptr(substream
) >= 0)
2553 case SNDRV_PCM_STATE_XRUN
:
2556 case SNDRV_PCM_STATE_SUSPENDED
:
2564 avail
= snd_pcm_capture_avail(runtime
);
2569 if (frames
> (snd_pcm_uframes_t
)avail
)
2571 appl_ptr
= runtime
->control
->appl_ptr
+ frames
;
2572 if (appl_ptr
>= (snd_pcm_sframes_t
)runtime
->boundary
)
2573 appl_ptr
-= runtime
->boundary
;
2574 runtime
->control
->appl_ptr
= appl_ptr
;
2577 snd_pcm_stream_unlock_irq(substream
);
2581 static int snd_pcm_hwsync(struct snd_pcm_substream
*substream
)
2583 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2586 snd_pcm_stream_lock_irq(substream
);
2587 switch (runtime
->status
->state
) {
2588 case SNDRV_PCM_STATE_DRAINING
:
2589 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2592 case SNDRV_PCM_STATE_RUNNING
:
2593 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2596 case SNDRV_PCM_STATE_PREPARED
:
2597 case SNDRV_PCM_STATE_SUSPENDED
:
2600 case SNDRV_PCM_STATE_XRUN
:
2608 snd_pcm_stream_unlock_irq(substream
);
2612 static int snd_pcm_delay(struct snd_pcm_substream
*substream
,
2613 snd_pcm_sframes_t __user
*res
)
2615 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2617 snd_pcm_sframes_t n
= 0;
2619 snd_pcm_stream_lock_irq(substream
);
2620 switch (runtime
->status
->state
) {
2621 case SNDRV_PCM_STATE_DRAINING
:
2622 if (substream
->stream
== SNDRV_PCM_STREAM_CAPTURE
)
2625 case SNDRV_PCM_STATE_RUNNING
:
2626 if ((err
= snd_pcm_update_hw_ptr(substream
)) < 0)
2629 case SNDRV_PCM_STATE_PREPARED
:
2630 case SNDRV_PCM_STATE_SUSPENDED
:
2632 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
)
2633 n
= snd_pcm_playback_hw_avail(runtime
);
2635 n
= snd_pcm_capture_avail(runtime
);
2636 n
+= runtime
->delay
;
2638 case SNDRV_PCM_STATE_XRUN
:
2646 snd_pcm_stream_unlock_irq(substream
);
2648 if (put_user(n
, res
))
2653 static int snd_pcm_sync_ptr(struct snd_pcm_substream
*substream
,
2654 struct snd_pcm_sync_ptr __user
*_sync_ptr
)
2656 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2657 struct snd_pcm_sync_ptr sync_ptr
;
2658 volatile struct snd_pcm_mmap_status
*status
;
2659 volatile struct snd_pcm_mmap_control
*control
;
2662 memset(&sync_ptr
, 0, sizeof(sync_ptr
));
2663 if (get_user(sync_ptr
.flags
, (unsigned __user
*)&(_sync_ptr
->flags
)))
2665 if (copy_from_user(&sync_ptr
.c
.control
, &(_sync_ptr
->c
.control
), sizeof(struct snd_pcm_mmap_control
)))
2667 status
= runtime
->status
;
2668 control
= runtime
->control
;
2669 if (sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_HWSYNC
) {
2670 err
= snd_pcm_hwsync(substream
);
2674 snd_pcm_stream_lock_irq(substream
);
2675 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_APPL
))
2676 control
->appl_ptr
= sync_ptr
.c
.control
.appl_ptr
;
2678 sync_ptr
.c
.control
.appl_ptr
= control
->appl_ptr
;
2679 if (!(sync_ptr
.flags
& SNDRV_PCM_SYNC_PTR_AVAIL_MIN
))
2680 control
->avail_min
= sync_ptr
.c
.control
.avail_min
;
2682 sync_ptr
.c
.control
.avail_min
= control
->avail_min
;
2683 sync_ptr
.s
.status
.state
= status
->state
;
2684 sync_ptr
.s
.status
.hw_ptr
= status
->hw_ptr
;
2685 sync_ptr
.s
.status
.tstamp
= status
->tstamp
;
2686 sync_ptr
.s
.status
.suspended_state
= status
->suspended_state
;
2687 snd_pcm_stream_unlock_irq(substream
);
2688 if (copy_to_user(_sync_ptr
, &sync_ptr
, sizeof(sync_ptr
)))
2693 static int snd_pcm_tstamp(struct snd_pcm_substream
*substream
, int __user
*_arg
)
2695 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2698 if (get_user(arg
, _arg
))
2700 if (arg
< 0 || arg
> SNDRV_PCM_TSTAMP_TYPE_LAST
)
2702 runtime
->tstamp_type
= arg
;
2706 static int snd_pcm_common_ioctl1(struct file
*file
,
2707 struct snd_pcm_substream
*substream
,
2708 unsigned int cmd
, void __user
*arg
)
2711 case SNDRV_PCM_IOCTL_PVERSION
:
2712 return put_user(SNDRV_PCM_VERSION
, (int __user
*)arg
) ? -EFAULT
: 0;
2713 case SNDRV_PCM_IOCTL_INFO
:
2714 return snd_pcm_info_user(substream
, arg
);
2715 case SNDRV_PCM_IOCTL_TSTAMP
: /* just for compatibility */
2717 case SNDRV_PCM_IOCTL_TTSTAMP
:
2718 return snd_pcm_tstamp(substream
, arg
);
2719 case SNDRV_PCM_IOCTL_HW_REFINE
:
2720 return snd_pcm_hw_refine_user(substream
, arg
);
2721 case SNDRV_PCM_IOCTL_HW_PARAMS
:
2722 return snd_pcm_hw_params_user(substream
, arg
);
2723 case SNDRV_PCM_IOCTL_HW_FREE
:
2724 return snd_pcm_hw_free(substream
);
2725 case SNDRV_PCM_IOCTL_SW_PARAMS
:
2726 return snd_pcm_sw_params_user(substream
, arg
);
2727 case SNDRV_PCM_IOCTL_STATUS
:
2728 return snd_pcm_status_user(substream
, arg
);
2729 case SNDRV_PCM_IOCTL_CHANNEL_INFO
:
2730 return snd_pcm_channel_info_user(substream
, arg
);
2731 case SNDRV_PCM_IOCTL_PREPARE
:
2732 return snd_pcm_prepare(substream
, file
);
2733 case SNDRV_PCM_IOCTL_RESET
:
2734 return snd_pcm_reset(substream
);
2735 case SNDRV_PCM_IOCTL_START
:
2736 return snd_pcm_action_lock_irq(&snd_pcm_action_start
, substream
, SNDRV_PCM_STATE_RUNNING
);
2737 case SNDRV_PCM_IOCTL_LINK
:
2738 return snd_pcm_link(substream
, (int)(unsigned long) arg
);
2739 case SNDRV_PCM_IOCTL_UNLINK
:
2740 return snd_pcm_unlink(substream
);
2741 case SNDRV_PCM_IOCTL_RESUME
:
2742 return snd_pcm_resume(substream
);
2743 case SNDRV_PCM_IOCTL_XRUN
:
2744 return snd_pcm_xrun(substream
);
2745 case SNDRV_PCM_IOCTL_HWSYNC
:
2746 return snd_pcm_hwsync(substream
);
2747 case SNDRV_PCM_IOCTL_DELAY
:
2748 return snd_pcm_delay(substream
, arg
);
2749 case SNDRV_PCM_IOCTL_SYNC_PTR
:
2750 return snd_pcm_sync_ptr(substream
, arg
);
2751 #ifdef CONFIG_SND_SUPPORT_OLD_API
2752 case SNDRV_PCM_IOCTL_HW_REFINE_OLD
:
2753 return snd_pcm_hw_refine_old_user(substream
, arg
);
2754 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD
:
2755 return snd_pcm_hw_params_old_user(substream
, arg
);
2757 case SNDRV_PCM_IOCTL_DRAIN
:
2758 return snd_pcm_drain(substream
, file
);
2759 case SNDRV_PCM_IOCTL_DROP
:
2760 return snd_pcm_drop(substream
);
2761 case SNDRV_PCM_IOCTL_PAUSE
:
2764 snd_pcm_stream_lock_irq(substream
);
2765 res
= snd_pcm_pause(substream
, (int)(unsigned long)arg
);
2766 snd_pcm_stream_unlock_irq(substream
);
2770 pcm_dbg(substream
->pcm
, "unknown ioctl = 0x%x\n", cmd
);
2774 static int snd_pcm_playback_ioctl1(struct file
*file
,
2775 struct snd_pcm_substream
*substream
,
2776 unsigned int cmd
, void __user
*arg
)
2778 if (snd_BUG_ON(!substream
))
2780 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_PLAYBACK
))
2783 case SNDRV_PCM_IOCTL_WRITEI_FRAMES
:
2785 struct snd_xferi xferi
;
2786 struct snd_xferi __user
*_xferi
= arg
;
2787 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2788 snd_pcm_sframes_t result
;
2789 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2791 if (put_user(0, &_xferi
->result
))
2793 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2795 result
= snd_pcm_lib_write(substream
, xferi
.buf
, xferi
.frames
);
2796 __put_user(result
, &_xferi
->result
);
2797 return result
< 0 ? result
: 0;
2799 case SNDRV_PCM_IOCTL_WRITEN_FRAMES
:
2801 struct snd_xfern xfern
;
2802 struct snd_xfern __user
*_xfern
= arg
;
2803 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2805 snd_pcm_sframes_t result
;
2806 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2808 if (runtime
->channels
> 128)
2810 if (put_user(0, &_xfern
->result
))
2812 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2815 bufs
= memdup_user(xfern
.bufs
,
2816 sizeof(void *) * runtime
->channels
);
2818 return PTR_ERR(bufs
);
2819 result
= snd_pcm_lib_writev(substream
, bufs
, xfern
.frames
);
2821 __put_user(result
, &_xfern
->result
);
2822 return result
< 0 ? result
: 0;
2824 case SNDRV_PCM_IOCTL_REWIND
:
2826 snd_pcm_uframes_t frames
;
2827 snd_pcm_uframes_t __user
*_frames
= arg
;
2828 snd_pcm_sframes_t result
;
2829 if (get_user(frames
, _frames
))
2831 if (put_user(0, _frames
))
2833 result
= snd_pcm_playback_rewind(substream
, frames
);
2834 __put_user(result
, _frames
);
2835 return result
< 0 ? result
: 0;
2837 case SNDRV_PCM_IOCTL_FORWARD
:
2839 snd_pcm_uframes_t frames
;
2840 snd_pcm_uframes_t __user
*_frames
= arg
;
2841 snd_pcm_sframes_t result
;
2842 if (get_user(frames
, _frames
))
2844 if (put_user(0, _frames
))
2846 result
= snd_pcm_playback_forward(substream
, frames
);
2847 __put_user(result
, _frames
);
2848 return result
< 0 ? result
: 0;
2851 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2854 static int snd_pcm_capture_ioctl1(struct file
*file
,
2855 struct snd_pcm_substream
*substream
,
2856 unsigned int cmd
, void __user
*arg
)
2858 if (snd_BUG_ON(!substream
))
2860 if (snd_BUG_ON(substream
->stream
!= SNDRV_PCM_STREAM_CAPTURE
))
2863 case SNDRV_PCM_IOCTL_READI_FRAMES
:
2865 struct snd_xferi xferi
;
2866 struct snd_xferi __user
*_xferi
= arg
;
2867 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2868 snd_pcm_sframes_t result
;
2869 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2871 if (put_user(0, &_xferi
->result
))
2873 if (copy_from_user(&xferi
, _xferi
, sizeof(xferi
)))
2875 result
= snd_pcm_lib_read(substream
, xferi
.buf
, xferi
.frames
);
2876 __put_user(result
, &_xferi
->result
);
2877 return result
< 0 ? result
: 0;
2879 case SNDRV_PCM_IOCTL_READN_FRAMES
:
2881 struct snd_xfern xfern
;
2882 struct snd_xfern __user
*_xfern
= arg
;
2883 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
2885 snd_pcm_sframes_t result
;
2886 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
2888 if (runtime
->channels
> 128)
2890 if (put_user(0, &_xfern
->result
))
2892 if (copy_from_user(&xfern
, _xfern
, sizeof(xfern
)))
2895 bufs
= memdup_user(xfern
.bufs
,
2896 sizeof(void *) * runtime
->channels
);
2898 return PTR_ERR(bufs
);
2899 result
= snd_pcm_lib_readv(substream
, bufs
, xfern
.frames
);
2901 __put_user(result
, &_xfern
->result
);
2902 return result
< 0 ? result
: 0;
2904 case SNDRV_PCM_IOCTL_REWIND
:
2906 snd_pcm_uframes_t frames
;
2907 snd_pcm_uframes_t __user
*_frames
= arg
;
2908 snd_pcm_sframes_t result
;
2909 if (get_user(frames
, _frames
))
2911 if (put_user(0, _frames
))
2913 result
= snd_pcm_capture_rewind(substream
, frames
);
2914 __put_user(result
, _frames
);
2915 return result
< 0 ? result
: 0;
2917 case SNDRV_PCM_IOCTL_FORWARD
:
2919 snd_pcm_uframes_t frames
;
2920 snd_pcm_uframes_t __user
*_frames
= arg
;
2921 snd_pcm_sframes_t result
;
2922 if (get_user(frames
, _frames
))
2924 if (put_user(0, _frames
))
2926 result
= snd_pcm_capture_forward(substream
, frames
);
2927 __put_user(result
, _frames
);
2928 return result
< 0 ? result
: 0;
2931 return snd_pcm_common_ioctl1(file
, substream
, cmd
, arg
);
2934 static long snd_pcm_playback_ioctl(struct file
*file
, unsigned int cmd
,
2937 struct snd_pcm_file
*pcm_file
;
2939 pcm_file
= file
->private_data
;
2941 if (((cmd
>> 8) & 0xff) != 'A')
2944 return snd_pcm_playback_ioctl1(file
, pcm_file
->substream
, cmd
,
2945 (void __user
*)arg
);
2948 static long snd_pcm_capture_ioctl(struct file
*file
, unsigned int cmd
,
2951 struct snd_pcm_file
*pcm_file
;
2953 pcm_file
= file
->private_data
;
2955 if (((cmd
>> 8) & 0xff) != 'A')
2958 return snd_pcm_capture_ioctl1(file
, pcm_file
->substream
, cmd
,
2959 (void __user
*)arg
);
2962 int snd_pcm_kernel_ioctl(struct snd_pcm_substream
*substream
,
2963 unsigned int cmd
, void *arg
)
2968 fs
= snd_enter_user();
2969 switch (substream
->stream
) {
2970 case SNDRV_PCM_STREAM_PLAYBACK
:
2971 result
= snd_pcm_playback_ioctl1(NULL
, substream
, cmd
,
2972 (void __user
*)arg
);
2974 case SNDRV_PCM_STREAM_CAPTURE
:
2975 result
= snd_pcm_capture_ioctl1(NULL
, substream
, cmd
,
2976 (void __user
*)arg
);
2986 EXPORT_SYMBOL(snd_pcm_kernel_ioctl
);
2988 static ssize_t
snd_pcm_read(struct file
*file
, char __user
*buf
, size_t count
,
2991 struct snd_pcm_file
*pcm_file
;
2992 struct snd_pcm_substream
*substream
;
2993 struct snd_pcm_runtime
*runtime
;
2994 snd_pcm_sframes_t result
;
2996 pcm_file
= file
->private_data
;
2997 substream
= pcm_file
->substream
;
2998 if (PCM_RUNTIME_CHECK(substream
))
3000 runtime
= substream
->runtime
;
3001 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3003 if (!frame_aligned(runtime
, count
))
3005 count
= bytes_to_frames(runtime
, count
);
3006 result
= snd_pcm_lib_read(substream
, buf
, count
);
3008 result
= frames_to_bytes(runtime
, result
);
3012 static ssize_t
snd_pcm_write(struct file
*file
, const char __user
*buf
,
3013 size_t count
, loff_t
* offset
)
3015 struct snd_pcm_file
*pcm_file
;
3016 struct snd_pcm_substream
*substream
;
3017 struct snd_pcm_runtime
*runtime
;
3018 snd_pcm_sframes_t result
;
3020 pcm_file
= file
->private_data
;
3021 substream
= pcm_file
->substream
;
3022 if (PCM_RUNTIME_CHECK(substream
))
3024 runtime
= substream
->runtime
;
3025 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3027 if (!frame_aligned(runtime
, count
))
3029 count
= bytes_to_frames(runtime
, count
);
3030 result
= snd_pcm_lib_write(substream
, buf
, count
);
3032 result
= frames_to_bytes(runtime
, result
);
3036 static ssize_t
snd_pcm_readv(struct kiocb
*iocb
, struct iov_iter
*to
)
3038 struct snd_pcm_file
*pcm_file
;
3039 struct snd_pcm_substream
*substream
;
3040 struct snd_pcm_runtime
*runtime
;
3041 snd_pcm_sframes_t result
;
3044 snd_pcm_uframes_t frames
;
3046 pcm_file
= iocb
->ki_filp
->private_data
;
3047 substream
= pcm_file
->substream
;
3048 if (PCM_RUNTIME_CHECK(substream
))
3050 runtime
= substream
->runtime
;
3051 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3053 if (!iter_is_iovec(to
))
3055 if (to
->nr_segs
> 1024 || to
->nr_segs
!= runtime
->channels
)
3057 if (!frame_aligned(runtime
, to
->iov
->iov_len
))
3059 frames
= bytes_to_samples(runtime
, to
->iov
->iov_len
);
3060 bufs
= kmalloc(sizeof(void *) * to
->nr_segs
, GFP_KERNEL
);
3063 for (i
= 0; i
< to
->nr_segs
; ++i
)
3064 bufs
[i
] = to
->iov
[i
].iov_base
;
3065 result
= snd_pcm_lib_readv(substream
, bufs
, frames
);
3067 result
= frames_to_bytes(runtime
, result
);
3072 static ssize_t
snd_pcm_writev(struct kiocb
*iocb
, struct iov_iter
*from
)
3074 struct snd_pcm_file
*pcm_file
;
3075 struct snd_pcm_substream
*substream
;
3076 struct snd_pcm_runtime
*runtime
;
3077 snd_pcm_sframes_t result
;
3080 snd_pcm_uframes_t frames
;
3082 pcm_file
= iocb
->ki_filp
->private_data
;
3083 substream
= pcm_file
->substream
;
3084 if (PCM_RUNTIME_CHECK(substream
))
3086 runtime
= substream
->runtime
;
3087 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3089 if (!iter_is_iovec(from
))
3091 if (from
->nr_segs
> 128 || from
->nr_segs
!= runtime
->channels
||
3092 !frame_aligned(runtime
, from
->iov
->iov_len
))
3094 frames
= bytes_to_samples(runtime
, from
->iov
->iov_len
);
3095 bufs
= kmalloc(sizeof(void *) * from
->nr_segs
, GFP_KERNEL
);
3098 for (i
= 0; i
< from
->nr_segs
; ++i
)
3099 bufs
[i
] = from
->iov
[i
].iov_base
;
3100 result
= snd_pcm_lib_writev(substream
, bufs
, frames
);
3102 result
= frames_to_bytes(runtime
, result
);
3107 static unsigned int snd_pcm_playback_poll(struct file
*file
, poll_table
* wait
)
3109 struct snd_pcm_file
*pcm_file
;
3110 struct snd_pcm_substream
*substream
;
3111 struct snd_pcm_runtime
*runtime
;
3113 snd_pcm_uframes_t avail
;
3115 pcm_file
= file
->private_data
;
3117 substream
= pcm_file
->substream
;
3118 if (PCM_RUNTIME_CHECK(substream
))
3120 runtime
= substream
->runtime
;
3122 poll_wait(file
, &runtime
->sleep
, wait
);
3124 snd_pcm_stream_lock_irq(substream
);
3125 avail
= snd_pcm_playback_avail(runtime
);
3126 switch (runtime
->status
->state
) {
3127 case SNDRV_PCM_STATE_RUNNING
:
3128 case SNDRV_PCM_STATE_PREPARED
:
3129 case SNDRV_PCM_STATE_PAUSED
:
3130 if (avail
>= runtime
->control
->avail_min
) {
3131 mask
= POLLOUT
| POLLWRNORM
;
3135 case SNDRV_PCM_STATE_DRAINING
:
3139 mask
= POLLOUT
| POLLWRNORM
| POLLERR
;
3142 snd_pcm_stream_unlock_irq(substream
);
3146 static unsigned int snd_pcm_capture_poll(struct file
*file
, poll_table
* wait
)
3148 struct snd_pcm_file
*pcm_file
;
3149 struct snd_pcm_substream
*substream
;
3150 struct snd_pcm_runtime
*runtime
;
3152 snd_pcm_uframes_t avail
;
3154 pcm_file
= file
->private_data
;
3156 substream
= pcm_file
->substream
;
3157 if (PCM_RUNTIME_CHECK(substream
))
3159 runtime
= substream
->runtime
;
3161 poll_wait(file
, &runtime
->sleep
, wait
);
3163 snd_pcm_stream_lock_irq(substream
);
3164 avail
= snd_pcm_capture_avail(runtime
);
3165 switch (runtime
->status
->state
) {
3166 case SNDRV_PCM_STATE_RUNNING
:
3167 case SNDRV_PCM_STATE_PREPARED
:
3168 case SNDRV_PCM_STATE_PAUSED
:
3169 if (avail
>= runtime
->control
->avail_min
) {
3170 mask
= POLLIN
| POLLRDNORM
;
3175 case SNDRV_PCM_STATE_DRAINING
:
3177 mask
= POLLIN
| POLLRDNORM
;
3182 mask
= POLLIN
| POLLRDNORM
| POLLERR
;
3185 snd_pcm_stream_unlock_irq(substream
);
3194 * Only on coherent architectures, we can mmap the status and the control records
3195 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3197 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3199 * mmap status record
3201 static int snd_pcm_mmap_status_fault(struct vm_area_struct
*area
,
3202 struct vm_fault
*vmf
)
3204 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3205 struct snd_pcm_runtime
*runtime
;
3207 if (substream
== NULL
)
3208 return VM_FAULT_SIGBUS
;
3209 runtime
= substream
->runtime
;
3210 vmf
->page
= virt_to_page(runtime
->status
);
3211 get_page(vmf
->page
);
3215 static const struct vm_operations_struct snd_pcm_vm_ops_status
=
3217 .fault
= snd_pcm_mmap_status_fault
,
3220 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3221 struct vm_area_struct
*area
)
3224 if (!(area
->vm_flags
& VM_READ
))
3226 size
= area
->vm_end
- area
->vm_start
;
3227 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status
)))
3229 area
->vm_ops
= &snd_pcm_vm_ops_status
;
3230 area
->vm_private_data
= substream
;
3231 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3236 * mmap control record
3238 static int snd_pcm_mmap_control_fault(struct vm_area_struct
*area
,
3239 struct vm_fault
*vmf
)
3241 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3242 struct snd_pcm_runtime
*runtime
;
3244 if (substream
== NULL
)
3245 return VM_FAULT_SIGBUS
;
3246 runtime
= substream
->runtime
;
3247 vmf
->page
= virt_to_page(runtime
->control
);
3248 get_page(vmf
->page
);
3252 static const struct vm_operations_struct snd_pcm_vm_ops_control
=
3254 .fault
= snd_pcm_mmap_control_fault
,
3257 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3258 struct vm_area_struct
*area
)
3261 if (!(area
->vm_flags
& VM_READ
))
3263 size
= area
->vm_end
- area
->vm_start
;
3264 if (size
!= PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control
)))
3266 area
->vm_ops
= &snd_pcm_vm_ops_control
;
3267 area
->vm_private_data
= substream
;
3268 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3271 #else /* ! coherent mmap */
3273 * don't support mmap for status and control records.
3275 static int snd_pcm_mmap_status(struct snd_pcm_substream
*substream
, struct file
*file
,
3276 struct vm_area_struct
*area
)
3280 static int snd_pcm_mmap_control(struct snd_pcm_substream
*substream
, struct file
*file
,
3281 struct vm_area_struct
*area
)
3285 #endif /* coherent mmap */
3287 static inline struct page
*
3288 snd_pcm_default_page_ops(struct snd_pcm_substream
*substream
, unsigned long ofs
)
3290 void *vaddr
= substream
->runtime
->dma_area
+ ofs
;
3291 return virt_to_page(vaddr
);
3295 * fault callback for mmapping a RAM page
3297 static int snd_pcm_mmap_data_fault(struct vm_area_struct
*area
,
3298 struct vm_fault
*vmf
)
3300 struct snd_pcm_substream
*substream
= area
->vm_private_data
;
3301 struct snd_pcm_runtime
*runtime
;
3302 unsigned long offset
;
3306 if (substream
== NULL
)
3307 return VM_FAULT_SIGBUS
;
3308 runtime
= substream
->runtime
;
3309 offset
= vmf
->pgoff
<< PAGE_SHIFT
;
3310 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3311 if (offset
> dma_bytes
- PAGE_SIZE
)
3312 return VM_FAULT_SIGBUS
;
3313 if (substream
->ops
->page
)
3314 page
= substream
->ops
->page(substream
, offset
);
3316 page
= snd_pcm_default_page_ops(substream
, offset
);
3318 return VM_FAULT_SIGBUS
;
3324 static const struct vm_operations_struct snd_pcm_vm_ops_data
= {
3325 .open
= snd_pcm_mmap_data_open
,
3326 .close
= snd_pcm_mmap_data_close
,
3329 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault
= {
3330 .open
= snd_pcm_mmap_data_open
,
3331 .close
= snd_pcm_mmap_data_close
,
3332 .fault
= snd_pcm_mmap_data_fault
,
3336 * mmap the DMA buffer on RAM
3340 * snd_pcm_lib_default_mmap - Default PCM data mmap function
3341 * @substream: PCM substream
3344 * This is the default mmap handler for PCM data. When mmap pcm_ops is NULL,
3345 * this function is invoked implicitly.
3347 int snd_pcm_lib_default_mmap(struct snd_pcm_substream
*substream
,
3348 struct vm_area_struct
*area
)
3350 area
->vm_flags
|= VM_DONTEXPAND
| VM_DONTDUMP
;
3351 #ifdef CONFIG_GENERIC_ALLOCATOR
3352 if (substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV_IRAM
) {
3353 area
->vm_page_prot
= pgprot_writecombine(area
->vm_page_prot
);
3354 return remap_pfn_range(area
, area
->vm_start
,
3355 substream
->dma_buffer
.addr
>> PAGE_SHIFT
,
3356 area
->vm_end
- area
->vm_start
, area
->vm_page_prot
);
3358 #endif /* CONFIG_GENERIC_ALLOCATOR */
3359 #ifndef CONFIG_X86 /* for avoiding warnings arch/x86/mm/pat.c */
3360 if (!substream
->ops
->page
&&
3361 substream
->dma_buffer
.dev
.type
== SNDRV_DMA_TYPE_DEV
)
3362 return dma_mmap_coherent(substream
->dma_buffer
.dev
.dev
,
3364 substream
->runtime
->dma_area
,
3365 substream
->runtime
->dma_addr
,
3366 area
->vm_end
- area
->vm_start
);
3367 #endif /* CONFIG_X86 */
3368 /* mmap with fault handler */
3369 area
->vm_ops
= &snd_pcm_vm_ops_data_fault
;
3372 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap
);
3375 * mmap the DMA buffer on I/O memory area
3377 #if SNDRV_PCM_INFO_MMAP_IOMEM
3379 * snd_pcm_lib_mmap_iomem - Default PCM data mmap function for I/O mem
3380 * @substream: PCM substream
3383 * When your hardware uses the iomapped pages as the hardware buffer and
3384 * wants to mmap it, pass this function as mmap pcm_ops. Note that this
3385 * is supposed to work only on limited architectures.
3387 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream
*substream
,
3388 struct vm_area_struct
*area
)
3390 struct snd_pcm_runtime
*runtime
= substream
->runtime
;;
3392 area
->vm_page_prot
= pgprot_noncached(area
->vm_page_prot
);
3393 return vm_iomap_memory(area
, runtime
->dma_addr
, runtime
->dma_bytes
);
3396 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem
);
3397 #endif /* SNDRV_PCM_INFO_MMAP */
3402 int snd_pcm_mmap_data(struct snd_pcm_substream
*substream
, struct file
*file
,
3403 struct vm_area_struct
*area
)
3405 struct snd_pcm_runtime
*runtime
;
3407 unsigned long offset
;
3411 if (substream
->stream
== SNDRV_PCM_STREAM_PLAYBACK
) {
3412 if (!(area
->vm_flags
& (VM_WRITE
|VM_READ
)))
3415 if (!(area
->vm_flags
& VM_READ
))
3418 runtime
= substream
->runtime
;
3419 if (runtime
->status
->state
== SNDRV_PCM_STATE_OPEN
)
3421 if (!(runtime
->info
& SNDRV_PCM_INFO_MMAP
))
3423 if (runtime
->access
== SNDRV_PCM_ACCESS_RW_INTERLEAVED
||
3424 runtime
->access
== SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
)
3426 size
= area
->vm_end
- area
->vm_start
;
3427 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3428 dma_bytes
= PAGE_ALIGN(runtime
->dma_bytes
);
3429 if ((size_t)size
> dma_bytes
)
3431 if (offset
> dma_bytes
- size
)
3434 area
->vm_ops
= &snd_pcm_vm_ops_data
;
3435 area
->vm_private_data
= substream
;
3436 if (substream
->ops
->mmap
)
3437 err
= substream
->ops
->mmap(substream
, area
);
3439 err
= snd_pcm_lib_default_mmap(substream
, area
);
3441 atomic_inc(&substream
->mmap_count
);
3445 EXPORT_SYMBOL(snd_pcm_mmap_data
);
3447 static int snd_pcm_mmap(struct file
*file
, struct vm_area_struct
*area
)
3449 struct snd_pcm_file
* pcm_file
;
3450 struct snd_pcm_substream
*substream
;
3451 unsigned long offset
;
3453 pcm_file
= file
->private_data
;
3454 substream
= pcm_file
->substream
;
3455 if (PCM_RUNTIME_CHECK(substream
))
3458 offset
= area
->vm_pgoff
<< PAGE_SHIFT
;
3460 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3461 if (pcm_file
->no_compat_mmap
)
3463 return snd_pcm_mmap_status(substream
, file
, area
);
3464 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3465 if (pcm_file
->no_compat_mmap
)
3467 return snd_pcm_mmap_control(substream
, file
, area
);
3469 return snd_pcm_mmap_data(substream
, file
, area
);
3474 static int snd_pcm_fasync(int fd
, struct file
* file
, int on
)
3476 struct snd_pcm_file
* pcm_file
;
3477 struct snd_pcm_substream
*substream
;
3478 struct snd_pcm_runtime
*runtime
;
3480 pcm_file
= file
->private_data
;
3481 substream
= pcm_file
->substream
;
3482 if (PCM_RUNTIME_CHECK(substream
))
3484 runtime
= substream
->runtime
;
3485 return fasync_helper(fd
, file
, on
, &runtime
->fasync
);
3491 #ifdef CONFIG_COMPAT
3492 #include "pcm_compat.c"
3494 #define snd_pcm_ioctl_compat NULL
3498 * To be removed helpers to keep binary compatibility
3501 #ifdef CONFIG_SND_SUPPORT_OLD_API
3502 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3503 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3505 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params
*params
,
3506 struct snd_pcm_hw_params_old
*oparams
)
3510 memset(params
, 0, sizeof(*params
));
3511 params
->flags
= oparams
->flags
;
3512 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3513 params
->masks
[i
].bits
[0] = oparams
->masks
[i
];
3514 memcpy(params
->intervals
, oparams
->intervals
, sizeof(oparams
->intervals
));
3515 params
->rmask
= __OLD_TO_NEW_MASK(oparams
->rmask
);
3516 params
->cmask
= __OLD_TO_NEW_MASK(oparams
->cmask
);
3517 params
->info
= oparams
->info
;
3518 params
->msbits
= oparams
->msbits
;
3519 params
->rate_num
= oparams
->rate_num
;
3520 params
->rate_den
= oparams
->rate_den
;
3521 params
->fifo_size
= oparams
->fifo_size
;
3524 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old
*oparams
,
3525 struct snd_pcm_hw_params
*params
)
3529 memset(oparams
, 0, sizeof(*oparams
));
3530 oparams
->flags
= params
->flags
;
3531 for (i
= 0; i
< ARRAY_SIZE(oparams
->masks
); i
++)
3532 oparams
->masks
[i
] = params
->masks
[i
].bits
[0];
3533 memcpy(oparams
->intervals
, params
->intervals
, sizeof(oparams
->intervals
));
3534 oparams
->rmask
= __NEW_TO_OLD_MASK(params
->rmask
);
3535 oparams
->cmask
= __NEW_TO_OLD_MASK(params
->cmask
);
3536 oparams
->info
= params
->info
;
3537 oparams
->msbits
= params
->msbits
;
3538 oparams
->rate_num
= params
->rate_num
;
3539 oparams
->rate_den
= params
->rate_den
;
3540 oparams
->fifo_size
= params
->fifo_size
;
3543 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream
*substream
,
3544 struct snd_pcm_hw_params_old __user
* _oparams
)
3546 struct snd_pcm_hw_params
*params
;
3547 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3550 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3554 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3555 if (IS_ERR(oparams
)) {
3556 err
= PTR_ERR(oparams
);
3559 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3560 err
= snd_pcm_hw_refine(substream
, params
);
3561 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3562 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3573 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream
*substream
,
3574 struct snd_pcm_hw_params_old __user
* _oparams
)
3576 struct snd_pcm_hw_params
*params
;
3577 struct snd_pcm_hw_params_old
*oparams
= NULL
;
3580 params
= kmalloc(sizeof(*params
), GFP_KERNEL
);
3584 oparams
= memdup_user(_oparams
, sizeof(*oparams
));
3585 if (IS_ERR(oparams
)) {
3586 err
= PTR_ERR(oparams
);
3589 snd_pcm_hw_convert_from_old_params(params
, oparams
);
3590 err
= snd_pcm_hw_params(substream
, params
);
3591 snd_pcm_hw_convert_to_old_params(oparams
, params
);
3592 if (copy_to_user(_oparams
, oparams
, sizeof(*oparams
))) {
3602 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3605 static unsigned long snd_pcm_get_unmapped_area(struct file
*file
,
3608 unsigned long pgoff
,
3609 unsigned long flags
)
3611 struct snd_pcm_file
*pcm_file
= file
->private_data
;
3612 struct snd_pcm_substream
*substream
= pcm_file
->substream
;
3613 struct snd_pcm_runtime
*runtime
= substream
->runtime
;
3614 unsigned long offset
= pgoff
<< PAGE_SHIFT
;
3617 case SNDRV_PCM_MMAP_OFFSET_STATUS
:
3618 return (unsigned long)runtime
->status
;
3619 case SNDRV_PCM_MMAP_OFFSET_CONTROL
:
3620 return (unsigned long)runtime
->control
;
3622 return (unsigned long)runtime
->dma_area
+ offset
;
3626 # define snd_pcm_get_unmapped_area NULL
3633 const struct file_operations snd_pcm_f_ops
[2] = {
3635 .owner
= THIS_MODULE
,
3636 .write
= snd_pcm_write
,
3637 .write_iter
= snd_pcm_writev
,
3638 .open
= snd_pcm_playback_open
,
3639 .release
= snd_pcm_release
,
3640 .llseek
= no_llseek
,
3641 .poll
= snd_pcm_playback_poll
,
3642 .unlocked_ioctl
= snd_pcm_playback_ioctl
,
3643 .compat_ioctl
= snd_pcm_ioctl_compat
,
3644 .mmap
= snd_pcm_mmap
,
3645 .fasync
= snd_pcm_fasync
,
3646 .get_unmapped_area
= snd_pcm_get_unmapped_area
,
3649 .owner
= THIS_MODULE
,
3650 .read
= snd_pcm_read
,
3651 .read_iter
= snd_pcm_readv
,
3652 .open
= snd_pcm_capture_open
,
3653 .release
= snd_pcm_release
,
3654 .llseek
= no_llseek
,
3655 .poll
= snd_pcm_capture_poll
,
3656 .unlocked_ioctl
= snd_pcm_capture_ioctl
,
3657 .compat_ioctl
= snd_pcm_ioctl_compat
,
3658 .mmap
= snd_pcm_mmap
,
3659 .fasync
= snd_pcm_fasync
,
3660 .get_unmapped_area
= snd_pcm_get_unmapped_area
,