2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/module.h>
24 #include <linux/file.h>
25 #include <linux/slab.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos.h>
28 #include <linux/uio.h>
29 #include <linux/dma-mapping.h>
30 #include <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/info.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/timer.h>
36 #include <sound/minors.h>
38 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
39 #include <dma-coherence.h>
46 struct snd_pcm_hw_params_old {
48 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
49 SNDRV_PCM_HW_PARAM_ACCESS + 1];
50 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
51 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
56 unsigned int rate_num;
57 unsigned int rate_den;
58 snd_pcm_uframes_t fifo_size;
59 unsigned char reserved[64];
62 #ifdef CONFIG_SND_SUPPORT_OLD_API
63 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
64 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
66 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
67 struct snd_pcm_hw_params_old __user * _oparams);
68 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
69 struct snd_pcm_hw_params_old __user * _oparams);
71 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
77 DEFINE_RWLOCK(snd_pcm_link_rwlock);
78 EXPORT_SYMBOL(snd_pcm_link_rwlock);
80 static DECLARE_RWSEM(snd_pcm_link_rwsem);
82 static inline mm_segment_t snd_enter_user(void)
84 mm_segment_t fs = get_fs();
89 static inline void snd_leave_user(mm_segment_t fs)
96 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
98 struct snd_pcm_runtime *runtime;
99 struct snd_pcm *pcm = substream->pcm;
100 struct snd_pcm_str *pstr = substream->pstr;
102 memset(info, 0, sizeof(*info));
103 info->card = pcm->card->number;
104 info->device = pcm->device;
105 info->stream = substream->stream;
106 info->subdevice = substream->number;
107 strlcpy(info->id, pcm->id, sizeof(info->id));
108 strlcpy(info->name, pcm->name, sizeof(info->name));
109 info->dev_class = pcm->dev_class;
110 info->dev_subclass = pcm->dev_subclass;
111 info->subdevices_count = pstr->substream_count;
112 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
113 strlcpy(info->subname, substream->name, sizeof(info->subname));
114 runtime = substream->runtime;
115 /* AB: FIXME!!! This is definitely nonsense */
117 info->sync = runtime->sync;
118 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
123 int snd_pcm_info_user(struct snd_pcm_substream *substream,
124 struct snd_pcm_info __user * _info)
126 struct snd_pcm_info *info;
129 info = kmalloc(sizeof(*info), GFP_KERNEL);
132 err = snd_pcm_info(substream, info);
134 if (copy_to_user(_info, info, sizeof(*info)))
144 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
145 static const char * const snd_pcm_hw_param_names[] = {
149 HW_PARAM(SAMPLE_BITS),
150 HW_PARAM(FRAME_BITS),
153 HW_PARAM(PERIOD_TIME),
154 HW_PARAM(PERIOD_SIZE),
155 HW_PARAM(PERIOD_BYTES),
157 HW_PARAM(BUFFER_TIME),
158 HW_PARAM(BUFFER_SIZE),
159 HW_PARAM(BUFFER_BYTES),
164 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
165 struct snd_pcm_hw_params *params)
168 struct snd_pcm_hardware *hw;
169 struct snd_interval *i = NULL;
170 struct snd_mask *m = NULL;
171 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
172 unsigned int rstamps[constrs->rules_num];
173 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
174 unsigned int stamp = 2;
178 params->fifo_size = 0;
179 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
181 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
182 params->rate_num = 0;
183 params->rate_den = 0;
186 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
187 m = hw_param_mask(params, k);
188 if (snd_mask_empty(m))
190 if (!(params->rmask & (1 << k)))
193 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
194 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
196 changed = snd_mask_refine(m, constrs_mask(constrs, k));
198 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
201 params->cmask |= 1 << k;
206 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
207 i = hw_param_interval(params, k);
208 if (snd_interval_empty(i))
210 if (!(params->rmask & (1 << k)))
213 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
218 i->openmin ? '(' : '[', i->min,
219 i->max, i->openmax ? ')' : ']');
222 changed = snd_interval_refine(i, constrs_interval(constrs, k));
227 printk("%c%u %u%c\n",
228 i->openmin ? '(' : '[', i->min,
229 i->max, i->openmax ? ')' : ']');
232 params->cmask |= 1 << k;
237 for (k = 0; k < constrs->rules_num; k++)
239 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
240 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
243 for (k = 0; k < constrs->rules_num; k++) {
244 struct snd_pcm_hw_rule *r = &constrs->rules[k];
247 if (r->cond && !(r->cond & params->flags))
249 for (d = 0; r->deps[d] >= 0; d++) {
250 if (vstamps[r->deps[d]] > rstamps[k]) {
258 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
260 printk("%s = ", snd_pcm_hw_param_names[r->var]);
261 if (hw_is_mask(r->var)) {
262 m = hw_param_mask(params, r->var);
263 printk("%x", *m->bits);
265 i = hw_param_interval(params, r->var);
270 i->openmin ? '(' : '[', i->min,
271 i->max, i->openmax ? ')' : ']');
275 changed = r->func(params, r);
279 if (hw_is_mask(r->var))
280 printk("%x", *m->bits);
286 i->openmin ? '(' : '[', i->min,
287 i->max, i->openmax ? ')' : ']');
293 if (changed && r->var >= 0) {
294 params->cmask |= (1 << r->var);
295 vstamps[r->var] = stamp;
303 if (!params->msbits) {
304 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
305 if (snd_interval_single(i))
306 params->msbits = snd_interval_value(i);
309 if (!params->rate_den) {
310 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
311 if (snd_interval_single(i)) {
312 params->rate_num = snd_interval_value(i);
313 params->rate_den = 1;
317 hw = &substream->runtime->hw;
319 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
320 if (!params->fifo_size) {
321 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
322 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
323 if (snd_mask_min(m) == snd_mask_max(m) &&
324 snd_interval_min(i) == snd_interval_max(i)) {
325 changed = substream->ops->ioctl(substream,
326 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
335 EXPORT_SYMBOL(snd_pcm_hw_refine);
337 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
338 struct snd_pcm_hw_params __user * _params)
340 struct snd_pcm_hw_params *params;
343 params = memdup_user(_params, sizeof(*params));
345 return PTR_ERR(params);
347 err = snd_pcm_hw_refine(substream, params);
348 if (copy_to_user(_params, params, sizeof(*params))) {
357 static int period_to_usecs(struct snd_pcm_runtime *runtime)
362 return -1; /* invalid */
364 /* take 75% of period time as the deadline */
365 usecs = (750000 / runtime->rate) * runtime->period_size;
366 usecs += ((750000 % runtime->rate) * runtime->period_size) /
372 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
373 struct snd_pcm_hw_params *params)
375 struct snd_pcm_runtime *runtime;
378 snd_pcm_uframes_t frames;
380 if (PCM_RUNTIME_CHECK(substream))
382 runtime = substream->runtime;
383 snd_pcm_stream_lock_irq(substream);
384 switch (runtime->status->state) {
385 case SNDRV_PCM_STATE_OPEN:
386 case SNDRV_PCM_STATE_SETUP:
387 case SNDRV_PCM_STATE_PREPARED:
390 snd_pcm_stream_unlock_irq(substream);
393 snd_pcm_stream_unlock_irq(substream);
394 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
395 if (!substream->oss.oss)
397 if (atomic_read(&substream->mmap_count))
401 err = snd_pcm_hw_refine(substream, params);
405 err = snd_pcm_hw_params_choose(substream, params);
409 if (substream->ops->hw_params != NULL) {
410 err = substream->ops->hw_params(substream, params);
415 runtime->access = params_access(params);
416 runtime->format = params_format(params);
417 runtime->subformat = params_subformat(params);
418 runtime->channels = params_channels(params);
419 runtime->rate = params_rate(params);
420 runtime->period_size = params_period_size(params);
421 runtime->periods = params_periods(params);
422 runtime->buffer_size = params_buffer_size(params);
423 runtime->info = params->info;
424 runtime->rate_num = params->rate_num;
425 runtime->rate_den = params->rate_den;
426 runtime->no_period_wakeup =
427 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
428 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
430 bits = snd_pcm_format_physical_width(runtime->format);
431 runtime->sample_bits = bits;
432 bits *= runtime->channels;
433 runtime->frame_bits = bits;
435 while (bits % 8 != 0) {
439 runtime->byte_align = bits / 8;
440 runtime->min_align = frames;
442 /* Default sw params */
443 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
444 runtime->period_step = 1;
445 runtime->control->avail_min = runtime->period_size;
446 runtime->start_threshold = 1;
447 runtime->stop_threshold = runtime->buffer_size;
448 runtime->silence_threshold = 0;
449 runtime->silence_size = 0;
450 runtime->boundary = runtime->buffer_size;
451 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
452 runtime->boundary *= 2;
454 snd_pcm_timer_resolution_change(substream);
455 runtime->status->state = SNDRV_PCM_STATE_SETUP;
457 if (pm_qos_request_active(&substream->latency_pm_qos_req))
458 pm_qos_remove_request(&substream->latency_pm_qos_req);
459 if ((usecs = period_to_usecs(runtime)) >= 0)
460 pm_qos_add_request(&substream->latency_pm_qos_req,
461 PM_QOS_CPU_DMA_LATENCY, usecs);
464 /* hardware might be unusable from this time,
465 so we force application to retry to set
466 the correct hardware parameter settings */
467 runtime->status->state = SNDRV_PCM_STATE_OPEN;
468 if (substream->ops->hw_free != NULL)
469 substream->ops->hw_free(substream);
473 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
474 struct snd_pcm_hw_params __user * _params)
476 struct snd_pcm_hw_params *params;
479 params = memdup_user(_params, sizeof(*params));
481 return PTR_ERR(params);
483 err = snd_pcm_hw_params(substream, params);
484 if (copy_to_user(_params, params, sizeof(*params))) {
493 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
495 struct snd_pcm_runtime *runtime;
498 if (PCM_RUNTIME_CHECK(substream))
500 runtime = substream->runtime;
501 snd_pcm_stream_lock_irq(substream);
502 switch (runtime->status->state) {
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 (atomic_read(&substream->mmap_count))
513 if (substream->ops->hw_free)
514 result = substream->ops->hw_free(substream);
515 runtime->status->state = SNDRV_PCM_STATE_OPEN;
516 pm_qos_remove_request(&substream->latency_pm_qos_req);
520 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
521 struct snd_pcm_sw_params *params)
523 struct snd_pcm_runtime *runtime;
526 if (PCM_RUNTIME_CHECK(substream))
528 runtime = substream->runtime;
529 snd_pcm_stream_lock_irq(substream);
530 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
531 snd_pcm_stream_unlock_irq(substream);
534 snd_pcm_stream_unlock_irq(substream);
536 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
538 if (params->avail_min == 0)
540 if (params->silence_size >= runtime->boundary) {
541 if (params->silence_threshold != 0)
544 if (params->silence_size > params->silence_threshold)
546 if (params->silence_threshold > runtime->buffer_size)
550 snd_pcm_stream_lock_irq(substream);
551 runtime->tstamp_mode = params->tstamp_mode;
552 runtime->period_step = params->period_step;
553 runtime->control->avail_min = params->avail_min;
554 runtime->start_threshold = params->start_threshold;
555 runtime->stop_threshold = params->stop_threshold;
556 runtime->silence_threshold = params->silence_threshold;
557 runtime->silence_size = params->silence_size;
558 params->boundary = runtime->boundary;
559 if (snd_pcm_running(substream)) {
560 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
561 runtime->silence_size > 0)
562 snd_pcm_playback_silence(substream, ULONG_MAX);
563 err = snd_pcm_update_state(substream, runtime);
565 snd_pcm_stream_unlock_irq(substream);
569 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
570 struct snd_pcm_sw_params __user * _params)
572 struct snd_pcm_sw_params params;
574 if (copy_from_user(¶ms, _params, sizeof(params)))
576 err = snd_pcm_sw_params(substream, ¶ms);
577 if (copy_to_user(_params, ¶ms, sizeof(params)))
582 int snd_pcm_status(struct snd_pcm_substream *substream,
583 struct snd_pcm_status *status)
585 struct snd_pcm_runtime *runtime = substream->runtime;
587 snd_pcm_stream_lock_irq(substream);
588 status->state = runtime->status->state;
589 status->suspended_state = runtime->status->suspended_state;
590 if (status->state == SNDRV_PCM_STATE_OPEN)
592 status->trigger_tstamp = runtime->trigger_tstamp;
593 if (snd_pcm_running(substream)) {
594 snd_pcm_update_hw_ptr(substream);
595 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
596 status->tstamp = runtime->status->tstamp;
600 snd_pcm_gettime(runtime, &status->tstamp);
602 status->appl_ptr = runtime->control->appl_ptr;
603 status->hw_ptr = runtime->status->hw_ptr;
604 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
605 status->avail = snd_pcm_playback_avail(runtime);
606 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
607 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
608 status->delay = runtime->buffer_size - status->avail;
609 status->delay += runtime->delay;
613 status->avail = snd_pcm_capture_avail(runtime);
614 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
615 status->delay = status->avail + runtime->delay;
619 status->avail_max = runtime->avail_max;
620 status->overrange = runtime->overrange;
621 runtime->avail_max = 0;
622 runtime->overrange = 0;
624 snd_pcm_stream_unlock_irq(substream);
628 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
629 struct snd_pcm_status __user * _status)
631 struct snd_pcm_status status;
634 memset(&status, 0, sizeof(status));
635 res = snd_pcm_status(substream, &status);
638 if (copy_to_user(_status, &status, sizeof(status)))
643 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
644 struct snd_pcm_channel_info * info)
646 struct snd_pcm_runtime *runtime;
647 unsigned int channel;
649 channel = info->channel;
650 runtime = substream->runtime;
651 snd_pcm_stream_lock_irq(substream);
652 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
653 snd_pcm_stream_unlock_irq(substream);
656 snd_pcm_stream_unlock_irq(substream);
657 if (channel >= runtime->channels)
659 memset(info, 0, sizeof(*info));
660 info->channel = channel;
661 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
664 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
665 struct snd_pcm_channel_info __user * _info)
667 struct snd_pcm_channel_info info;
670 if (copy_from_user(&info, _info, sizeof(info)))
672 res = snd_pcm_channel_info(substream, &info);
675 if (copy_to_user(_info, &info, sizeof(info)))
680 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
682 struct snd_pcm_runtime *runtime = substream->runtime;
683 if (runtime->trigger_master == NULL)
685 if (runtime->trigger_master == substream) {
686 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
688 snd_pcm_trigger_tstamp(runtime->trigger_master);
689 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
691 runtime->trigger_master = NULL;
695 int (*pre_action)(struct snd_pcm_substream *substream, int state);
696 int (*do_action)(struct snd_pcm_substream *substream, int state);
697 void (*undo_action)(struct snd_pcm_substream *substream, int state);
698 void (*post_action)(struct snd_pcm_substream *substream, int state);
702 * this functions is core for handling of linked stream
703 * Note: the stream state might be changed also on failure
704 * Note2: call with calling stream lock + link lock
706 static int snd_pcm_action_group(struct action_ops *ops,
707 struct snd_pcm_substream *substream,
708 int state, int do_lock)
710 struct snd_pcm_substream *s = NULL;
711 struct snd_pcm_substream *s1;
714 snd_pcm_group_for_each_entry(s, substream) {
715 if (do_lock && s != substream)
716 spin_lock_nested(&s->self_group.lock,
717 SINGLE_DEPTH_NESTING);
718 res = ops->pre_action(s, state);
722 snd_pcm_group_for_each_entry(s, substream) {
723 res = ops->do_action(s, state);
725 if (ops->undo_action) {
726 snd_pcm_group_for_each_entry(s1, substream) {
727 if (s1 == s) /* failed stream */
729 ops->undo_action(s1, state);
732 s = NULL; /* unlock all */
736 snd_pcm_group_for_each_entry(s, substream) {
737 ops->post_action(s, state);
742 snd_pcm_group_for_each_entry(s1, substream) {
744 spin_unlock(&s1->self_group.lock);
745 if (s1 == s) /* end */
753 * Note: call with stream lock
755 static int snd_pcm_action_single(struct action_ops *ops,
756 struct snd_pcm_substream *substream,
761 res = ops->pre_action(substream, state);
764 res = ops->do_action(substream, state);
766 ops->post_action(substream, state);
767 else if (ops->undo_action)
768 ops->undo_action(substream, state);
773 * Note: call with stream lock
775 static int snd_pcm_action(struct action_ops *ops,
776 struct snd_pcm_substream *substream,
781 if (snd_pcm_stream_linked(substream)) {
782 if (!spin_trylock(&substream->group->lock)) {
783 spin_unlock(&substream->self_group.lock);
784 spin_lock(&substream->group->lock);
785 spin_lock(&substream->self_group.lock);
787 res = snd_pcm_action_group(ops, substream, state, 1);
788 spin_unlock(&substream->group->lock);
790 res = snd_pcm_action_single(ops, substream, state);
796 * Note: don't use any locks before
798 static int snd_pcm_action_lock_irq(struct action_ops *ops,
799 struct snd_pcm_substream *substream,
804 read_lock_irq(&snd_pcm_link_rwlock);
805 if (snd_pcm_stream_linked(substream)) {
806 spin_lock(&substream->group->lock);
807 spin_lock(&substream->self_group.lock);
808 res = snd_pcm_action_group(ops, substream, state, 1);
809 spin_unlock(&substream->self_group.lock);
810 spin_unlock(&substream->group->lock);
812 spin_lock(&substream->self_group.lock);
813 res = snd_pcm_action_single(ops, substream, state);
814 spin_unlock(&substream->self_group.lock);
816 read_unlock_irq(&snd_pcm_link_rwlock);
822 static int snd_pcm_action_nonatomic(struct action_ops *ops,
823 struct snd_pcm_substream *substream,
828 down_read(&snd_pcm_link_rwsem);
829 if (snd_pcm_stream_linked(substream))
830 res = snd_pcm_action_group(ops, substream, state, 0);
832 res = snd_pcm_action_single(ops, substream, state);
833 up_read(&snd_pcm_link_rwsem);
840 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
842 struct snd_pcm_runtime *runtime = substream->runtime;
843 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
845 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
846 !snd_pcm_playback_data(substream))
848 runtime->trigger_master = substream;
852 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
854 if (substream->runtime->trigger_master != substream)
856 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
859 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
861 if (substream->runtime->trigger_master == substream)
862 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
865 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
867 struct snd_pcm_runtime *runtime = substream->runtime;
868 snd_pcm_trigger_tstamp(substream);
869 runtime->hw_ptr_jiffies = jiffies;
870 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
872 runtime->status->state = state;
873 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
874 runtime->silence_size > 0)
875 snd_pcm_playback_silence(substream, ULONG_MAX);
876 if (substream->timer)
877 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
878 &runtime->trigger_tstamp);
881 static struct action_ops snd_pcm_action_start = {
882 .pre_action = snd_pcm_pre_start,
883 .do_action = snd_pcm_do_start,
884 .undo_action = snd_pcm_undo_start,
885 .post_action = snd_pcm_post_start
889 * snd_pcm_start - start all linked streams
890 * @substream: the PCM substream instance
892 int snd_pcm_start(struct snd_pcm_substream *substream)
894 return snd_pcm_action(&snd_pcm_action_start, substream,
895 SNDRV_PCM_STATE_RUNNING);
901 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
903 struct snd_pcm_runtime *runtime = substream->runtime;
904 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
906 runtime->trigger_master = substream;
910 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
912 if (substream->runtime->trigger_master == substream &&
913 snd_pcm_running(substream))
914 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
915 return 0; /* unconditonally stop all substreams */
918 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
920 struct snd_pcm_runtime *runtime = substream->runtime;
921 if (runtime->status->state != state) {
922 snd_pcm_trigger_tstamp(substream);
923 if (substream->timer)
924 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
925 &runtime->trigger_tstamp);
926 runtime->status->state = state;
928 wake_up(&runtime->sleep);
929 wake_up(&runtime->tsleep);
932 static struct action_ops snd_pcm_action_stop = {
933 .pre_action = snd_pcm_pre_stop,
934 .do_action = snd_pcm_do_stop,
935 .post_action = snd_pcm_post_stop
939 * snd_pcm_stop - try to stop all running streams in the substream group
940 * @substream: the PCM substream instance
941 * @state: PCM state after stopping the stream
943 * The state of each stream is then changed to the given state unconditionally.
945 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
947 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
950 EXPORT_SYMBOL(snd_pcm_stop);
953 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
954 * @substream: the PCM substream
956 * After stopping, the state is changed to SETUP.
957 * Unlike snd_pcm_stop(), this affects only the given stream.
959 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
961 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
962 SNDRV_PCM_STATE_SETUP);
968 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
970 struct snd_pcm_runtime *runtime = substream->runtime;
971 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
974 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
976 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
978 runtime->trigger_master = substream;
982 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
984 if (substream->runtime->trigger_master != substream)
986 /* some drivers might use hw_ptr to recover from the pause -
987 update the hw_ptr now */
989 snd_pcm_update_hw_ptr(substream);
990 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
991 * a delta between the current jiffies, this gives a large enough
992 * delta, effectively to skip the check once.
994 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
995 return substream->ops->trigger(substream,
996 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
997 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1000 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1002 if (substream->runtime->trigger_master == substream)
1003 substream->ops->trigger(substream,
1004 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1005 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1008 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1010 struct snd_pcm_runtime *runtime = substream->runtime;
1011 snd_pcm_trigger_tstamp(substream);
1013 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1014 if (substream->timer)
1015 snd_timer_notify(substream->timer,
1016 SNDRV_TIMER_EVENT_MPAUSE,
1017 &runtime->trigger_tstamp);
1018 wake_up(&runtime->sleep);
1019 wake_up(&runtime->tsleep);
1021 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1022 if (substream->timer)
1023 snd_timer_notify(substream->timer,
1024 SNDRV_TIMER_EVENT_MCONTINUE,
1025 &runtime->trigger_tstamp);
1029 static struct action_ops snd_pcm_action_pause = {
1030 .pre_action = snd_pcm_pre_pause,
1031 .do_action = snd_pcm_do_pause,
1032 .undo_action = snd_pcm_undo_pause,
1033 .post_action = snd_pcm_post_pause
1037 * Push/release the pause for all linked streams.
1039 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1041 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1047 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1049 struct snd_pcm_runtime *runtime = substream->runtime;
1050 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1052 runtime->trigger_master = substream;
1056 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1058 struct snd_pcm_runtime *runtime = substream->runtime;
1059 if (runtime->trigger_master != substream)
1061 if (! snd_pcm_running(substream))
1063 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1064 return 0; /* suspend unconditionally */
1067 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1069 struct snd_pcm_runtime *runtime = substream->runtime;
1070 snd_pcm_trigger_tstamp(substream);
1071 if (substream->timer)
1072 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1073 &runtime->trigger_tstamp);
1074 runtime->status->suspended_state = runtime->status->state;
1075 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1076 wake_up(&runtime->sleep);
1077 wake_up(&runtime->tsleep);
1080 static struct action_ops snd_pcm_action_suspend = {
1081 .pre_action = snd_pcm_pre_suspend,
1082 .do_action = snd_pcm_do_suspend,
1083 .post_action = snd_pcm_post_suspend
1087 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1088 * @substream: the PCM substream
1090 * After this call, all streams are changed to SUSPENDED state.
1092 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1095 unsigned long flags;
1100 snd_pcm_stream_lock_irqsave(substream, flags);
1101 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1102 snd_pcm_stream_unlock_irqrestore(substream, flags);
1106 EXPORT_SYMBOL(snd_pcm_suspend);
1109 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1110 * @pcm: the PCM instance
1112 * After this call, all streams are changed to SUSPENDED state.
1114 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1116 struct snd_pcm_substream *substream;
1117 int stream, err = 0;
1122 for (stream = 0; stream < 2; stream++) {
1123 for (substream = pcm->streams[stream].substream;
1124 substream; substream = substream->next) {
1125 /* FIXME: the open/close code should lock this as well */
1126 if (substream->runtime == NULL)
1128 err = snd_pcm_suspend(substream);
1129 if (err < 0 && err != -EBUSY)
1136 EXPORT_SYMBOL(snd_pcm_suspend_all);
1140 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1142 struct snd_pcm_runtime *runtime = substream->runtime;
1143 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1145 runtime->trigger_master = substream;
1149 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1151 struct snd_pcm_runtime *runtime = substream->runtime;
1152 if (runtime->trigger_master != substream)
1154 /* DMA not running previously? */
1155 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1156 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1157 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1159 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1162 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1164 if (substream->runtime->trigger_master == substream &&
1165 snd_pcm_running(substream))
1166 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1169 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1171 struct snd_pcm_runtime *runtime = substream->runtime;
1172 snd_pcm_trigger_tstamp(substream);
1173 if (substream->timer)
1174 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1175 &runtime->trigger_tstamp);
1176 runtime->status->state = runtime->status->suspended_state;
1179 static struct action_ops snd_pcm_action_resume = {
1180 .pre_action = snd_pcm_pre_resume,
1181 .do_action = snd_pcm_do_resume,
1182 .undo_action = snd_pcm_undo_resume,
1183 .post_action = snd_pcm_post_resume
1186 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1188 struct snd_card *card = substream->pcm->card;
1191 snd_power_lock(card);
1192 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1193 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1194 snd_power_unlock(card);
1200 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1205 #endif /* CONFIG_PM */
1210 * Change the RUNNING stream(s) to XRUN state.
1212 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1214 struct snd_card *card = substream->pcm->card;
1215 struct snd_pcm_runtime *runtime = substream->runtime;
1218 snd_power_lock(card);
1219 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1220 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1225 snd_pcm_stream_lock_irq(substream);
1226 switch (runtime->status->state) {
1227 case SNDRV_PCM_STATE_XRUN:
1228 result = 0; /* already there */
1230 case SNDRV_PCM_STATE_RUNNING:
1231 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1236 snd_pcm_stream_unlock_irq(substream);
1238 snd_power_unlock(card);
1245 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1247 struct snd_pcm_runtime *runtime = substream->runtime;
1248 switch (runtime->status->state) {
1249 case SNDRV_PCM_STATE_RUNNING:
1250 case SNDRV_PCM_STATE_PREPARED:
1251 case SNDRV_PCM_STATE_PAUSED:
1252 case SNDRV_PCM_STATE_SUSPENDED:
1259 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1261 struct snd_pcm_runtime *runtime = substream->runtime;
1262 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1265 runtime->hw_ptr_base = 0;
1266 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1267 runtime->status->hw_ptr % runtime->period_size;
1268 runtime->silence_start = runtime->status->hw_ptr;
1269 runtime->silence_filled = 0;
1273 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1275 struct snd_pcm_runtime *runtime = substream->runtime;
1276 runtime->control->appl_ptr = runtime->status->hw_ptr;
1277 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1278 runtime->silence_size > 0)
1279 snd_pcm_playback_silence(substream, ULONG_MAX);
1282 static struct action_ops snd_pcm_action_reset = {
1283 .pre_action = snd_pcm_pre_reset,
1284 .do_action = snd_pcm_do_reset,
1285 .post_action = snd_pcm_post_reset
1288 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1290 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1296 /* we use the second argument for updating f_flags */
1297 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1300 struct snd_pcm_runtime *runtime = substream->runtime;
1301 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1302 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1304 if (snd_pcm_running(substream))
1306 substream->f_flags = f_flags;
1310 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1313 err = substream->ops->prepare(substream);
1316 return snd_pcm_do_reset(substream, 0);
1319 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1321 struct snd_pcm_runtime *runtime = substream->runtime;
1322 runtime->control->appl_ptr = runtime->status->hw_ptr;
1323 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1326 static struct action_ops snd_pcm_action_prepare = {
1327 .pre_action = snd_pcm_pre_prepare,
1328 .do_action = snd_pcm_do_prepare,
1329 .post_action = snd_pcm_post_prepare
1333 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1334 * @substream: the PCM substream instance
1335 * @file: file to refer f_flags
1337 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1341 struct snd_card *card = substream->pcm->card;
1345 f_flags = file->f_flags;
1347 f_flags = substream->f_flags;
1349 snd_power_lock(card);
1350 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1351 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1352 substream, f_flags);
1353 snd_power_unlock(card);
1361 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1363 struct snd_pcm_runtime *runtime = substream->runtime;
1364 switch (runtime->status->state) {
1365 case SNDRV_PCM_STATE_OPEN:
1366 case SNDRV_PCM_STATE_DISCONNECTED:
1367 case SNDRV_PCM_STATE_SUSPENDED:
1370 runtime->trigger_master = substream;
1374 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1376 struct snd_pcm_runtime *runtime = substream->runtime;
1377 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1378 switch (runtime->status->state) {
1379 case SNDRV_PCM_STATE_PREPARED:
1380 /* start playback stream if possible */
1381 if (! snd_pcm_playback_empty(substream)) {
1382 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1383 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1386 case SNDRV_PCM_STATE_RUNNING:
1387 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1389 case SNDRV_PCM_STATE_XRUN:
1390 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1396 /* stop running stream */
1397 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1398 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1399 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1400 snd_pcm_do_stop(substream, new_state);
1401 snd_pcm_post_stop(substream, new_state);
1407 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1411 static struct action_ops snd_pcm_action_drain_init = {
1412 .pre_action = snd_pcm_pre_drain_init,
1413 .do_action = snd_pcm_do_drain_init,
1414 .post_action = snd_pcm_post_drain_init
1417 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1420 * Drain the stream(s).
1421 * When the substream is linked, sync until the draining of all playback streams
1423 * After this call, all streams are supposed to be either SETUP or DRAINING
1424 * (capture only) state.
1426 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1429 struct snd_card *card;
1430 struct snd_pcm_runtime *runtime;
1431 struct snd_pcm_substream *s;
1436 card = substream->pcm->card;
1437 runtime = substream->runtime;
1439 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1442 snd_power_lock(card);
1443 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1444 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1446 snd_power_unlock(card);
1452 if (file->f_flags & O_NONBLOCK)
1454 } else if (substream->f_flags & O_NONBLOCK)
1457 down_read(&snd_pcm_link_rwsem);
1458 snd_pcm_stream_lock_irq(substream);
1460 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1461 snd_pcm_pause(substream, 0);
1463 /* pre-start/stop - all running streams are changed to DRAINING state */
1464 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1467 /* in non-blocking, we don't wait in ioctl but let caller poll */
1475 struct snd_pcm_runtime *to_check;
1476 if (signal_pending(current)) {
1477 result = -ERESTARTSYS;
1480 /* find a substream to drain */
1482 snd_pcm_group_for_each_entry(s, substream) {
1483 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1485 runtime = s->runtime;
1486 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1492 break; /* all drained */
1493 init_waitqueue_entry(&wait, current);
1494 add_wait_queue(&to_check->sleep, &wait);
1495 snd_pcm_stream_unlock_irq(substream);
1496 up_read(&snd_pcm_link_rwsem);
1497 snd_power_unlock(card);
1498 if (runtime->no_period_wakeup)
1499 tout = MAX_SCHEDULE_TIMEOUT;
1502 if (runtime->rate) {
1503 long t = runtime->period_size * 2 / runtime->rate;
1504 tout = max(t, tout);
1506 tout = msecs_to_jiffies(tout * 1000);
1508 tout = schedule_timeout_interruptible(tout);
1509 snd_power_lock(card);
1510 down_read(&snd_pcm_link_rwsem);
1511 snd_pcm_stream_lock_irq(substream);
1512 remove_wait_queue(&to_check->sleep, &wait);
1514 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1517 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1518 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1526 snd_pcm_stream_unlock_irq(substream);
1527 up_read(&snd_pcm_link_rwsem);
1528 snd_power_unlock(card);
1536 * Immediately put all linked substreams into SETUP state.
1538 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1540 struct snd_pcm_runtime *runtime;
1543 if (PCM_RUNTIME_CHECK(substream))
1545 runtime = substream->runtime;
1547 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1548 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1549 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1552 snd_pcm_stream_lock_irq(substream);
1554 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1555 snd_pcm_pause(substream, 0);
1557 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1558 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1559 snd_pcm_stream_unlock_irq(substream);
1565 /* WARNING: Don't forget to fput back the file */
1566 static struct file *snd_pcm_file_fd(int fd, int *fput_needed)
1569 struct inode *inode;
1572 file = fget_light(fd, fput_needed);
1575 inode = file->f_path.dentry->d_inode;
1576 if (!S_ISCHR(inode->i_mode) ||
1577 imajor(inode) != snd_major) {
1578 fput_light(file, *fput_needed);
1581 minor = iminor(inode);
1582 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1583 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1584 fput_light(file, *fput_needed);
1593 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1597 struct snd_pcm_file *pcm_file;
1598 struct snd_pcm_substream *substream1;
1599 struct snd_pcm_group *group;
1602 file = snd_pcm_file_fd(fd, &fput_needed);
1605 pcm_file = file->private_data;
1606 substream1 = pcm_file->substream;
1607 group = kmalloc(sizeof(*group), GFP_KERNEL);
1612 down_write(&snd_pcm_link_rwsem);
1613 write_lock_irq(&snd_pcm_link_rwlock);
1614 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1615 substream->runtime->status->state != substream1->runtime->status->state) {
1619 if (snd_pcm_stream_linked(substream1)) {
1623 if (!snd_pcm_stream_linked(substream)) {
1624 substream->group = group;
1625 spin_lock_init(&substream->group->lock);
1626 INIT_LIST_HEAD(&substream->group->substreams);
1627 list_add_tail(&substream->link_list, &substream->group->substreams);
1628 substream->group->count = 1;
1630 list_add_tail(&substream1->link_list, &substream->group->substreams);
1631 substream->group->count++;
1632 substream1->group = substream->group;
1634 write_unlock_irq(&snd_pcm_link_rwlock);
1635 up_write(&snd_pcm_link_rwsem);
1637 fput_light(file, fput_needed);
1643 static void relink_to_local(struct snd_pcm_substream *substream)
1645 substream->group = &substream->self_group;
1646 INIT_LIST_HEAD(&substream->self_group.substreams);
1647 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1650 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1652 struct snd_pcm_substream *s;
1655 down_write(&snd_pcm_link_rwsem);
1656 write_lock_irq(&snd_pcm_link_rwlock);
1657 if (!snd_pcm_stream_linked(substream)) {
1661 list_del(&substream->link_list);
1662 substream->group->count--;
1663 if (substream->group->count == 1) { /* detach the last stream, too */
1664 snd_pcm_group_for_each_entry(s, substream) {
1668 kfree(substream->group);
1670 relink_to_local(substream);
1672 write_unlock_irq(&snd_pcm_link_rwlock);
1673 up_write(&snd_pcm_link_rwsem);
1680 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1681 struct snd_pcm_hw_rule *rule)
1683 struct snd_interval t;
1684 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1685 hw_param_interval_c(params, rule->deps[1]), &t);
1686 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1689 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1690 struct snd_pcm_hw_rule *rule)
1692 struct snd_interval t;
1693 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1694 hw_param_interval_c(params, rule->deps[1]), &t);
1695 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1698 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1699 struct snd_pcm_hw_rule *rule)
1701 struct snd_interval t;
1702 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1703 hw_param_interval_c(params, rule->deps[1]),
1704 (unsigned long) rule->private, &t);
1705 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1708 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1709 struct snd_pcm_hw_rule *rule)
1711 struct snd_interval t;
1712 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1713 (unsigned long) rule->private,
1714 hw_param_interval_c(params, rule->deps[1]), &t);
1715 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1718 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1719 struct snd_pcm_hw_rule *rule)
1722 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1724 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1726 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1728 if (! snd_mask_test(mask, k))
1730 bits = snd_pcm_format_physical_width(k);
1732 continue; /* ignore invalid formats */
1733 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1734 snd_mask_reset(&m, k);
1736 return snd_mask_refine(mask, &m);
1739 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1740 struct snd_pcm_hw_rule *rule)
1742 struct snd_interval t;
1748 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1750 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1752 bits = snd_pcm_format_physical_width(k);
1754 continue; /* ignore invalid formats */
1755 if (t.min > (unsigned)bits)
1757 if (t.max < (unsigned)bits)
1761 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1764 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1765 #error "Change this table"
1768 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1769 48000, 64000, 88200, 96000, 176400, 192000 };
1771 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1772 .count = ARRAY_SIZE(rates),
1776 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1777 struct snd_pcm_hw_rule *rule)
1779 struct snd_pcm_hardware *hw = rule->private;
1780 return snd_interval_list(hw_param_interval(params, rule->var),
1781 snd_pcm_known_rates.count,
1782 snd_pcm_known_rates.list, hw->rates);
1785 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1786 struct snd_pcm_hw_rule *rule)
1788 struct snd_interval t;
1789 struct snd_pcm_substream *substream = rule->private;
1791 t.max = substream->buffer_bytes_max;
1795 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1798 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1800 struct snd_pcm_runtime *runtime = substream->runtime;
1801 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1804 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1805 snd_mask_any(constrs_mask(constrs, k));
1808 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1809 snd_interval_any(constrs_interval(constrs, k));
1812 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1813 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1814 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1815 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1816 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1818 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1819 snd_pcm_hw_rule_format, NULL,
1820 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1823 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1824 snd_pcm_hw_rule_sample_bits, NULL,
1825 SNDRV_PCM_HW_PARAM_FORMAT,
1826 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1829 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1830 snd_pcm_hw_rule_div, NULL,
1831 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1834 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1835 snd_pcm_hw_rule_mul, NULL,
1836 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1839 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1840 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1841 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1844 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1845 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1846 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1849 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1850 snd_pcm_hw_rule_div, NULL,
1851 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1854 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1855 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1856 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1859 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1860 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1861 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1864 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1865 snd_pcm_hw_rule_div, NULL,
1866 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1869 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1870 snd_pcm_hw_rule_div, NULL,
1871 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1874 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1875 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1876 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1879 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1880 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1881 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1884 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1885 snd_pcm_hw_rule_mul, NULL,
1886 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1889 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1890 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1891 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1894 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1895 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1896 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1899 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1900 snd_pcm_hw_rule_muldivk, (void*) 8,
1901 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1904 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1905 snd_pcm_hw_rule_muldivk, (void*) 8,
1906 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1909 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1910 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1911 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1914 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1915 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1916 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1922 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1924 struct snd_pcm_runtime *runtime = substream->runtime;
1925 struct snd_pcm_hardware *hw = &runtime->hw;
1927 unsigned int mask = 0;
1929 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1930 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1931 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1932 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1933 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1934 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1935 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1936 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1937 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1938 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1939 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1941 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1945 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1949 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1953 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1954 hw->channels_min, hw->channels_max);
1958 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1959 hw->rate_min, hw->rate_max);
1963 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1964 hw->period_bytes_min, hw->period_bytes_max);
1968 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1969 hw->periods_min, hw->periods_max);
1973 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1974 hw->period_bytes_min, hw->buffer_bytes_max);
1978 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1979 snd_pcm_hw_rule_buffer_bytes_max, substream,
1980 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1985 if (runtime->dma_bytes) {
1986 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1991 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1992 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1993 snd_pcm_hw_rule_rate, hw,
1994 SNDRV_PCM_HW_PARAM_RATE, -1);
1999 /* FIXME: this belong to lowlevel */
2000 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2005 static void pcm_release_private(struct snd_pcm_substream *substream)
2007 snd_pcm_unlink(substream);
2010 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2012 substream->ref_count--;
2013 if (substream->ref_count > 0)
2016 snd_pcm_drop(substream);
2017 if (substream->hw_opened) {
2018 if (substream->ops->hw_free != NULL)
2019 substream->ops->hw_free(substream);
2020 substream->ops->close(substream);
2021 substream->hw_opened = 0;
2023 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2024 pm_qos_remove_request(&substream->latency_pm_qos_req);
2025 if (substream->pcm_release) {
2026 substream->pcm_release(substream);
2027 substream->pcm_release = NULL;
2029 snd_pcm_detach_substream(substream);
2032 EXPORT_SYMBOL(snd_pcm_release_substream);
2034 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2036 struct snd_pcm_substream **rsubstream)
2038 struct snd_pcm_substream *substream;
2041 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2044 if (substream->ref_count > 1) {
2045 *rsubstream = substream;
2049 err = snd_pcm_hw_constraints_init(substream);
2051 snd_printd("snd_pcm_hw_constraints_init failed\n");
2055 if ((err = substream->ops->open(substream)) < 0)
2058 substream->hw_opened = 1;
2060 err = snd_pcm_hw_constraints_complete(substream);
2062 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2066 *rsubstream = substream;
2070 snd_pcm_release_substream(substream);
2074 EXPORT_SYMBOL(snd_pcm_open_substream);
2076 static int snd_pcm_open_file(struct file *file,
2077 struct snd_pcm *pcm,
2080 struct snd_pcm_file *pcm_file;
2081 struct snd_pcm_substream *substream;
2084 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2088 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2089 if (pcm_file == NULL) {
2090 snd_pcm_release_substream(substream);
2093 pcm_file->substream = substream;
2094 if (substream->ref_count == 1) {
2095 substream->file = pcm_file;
2096 substream->pcm_release = pcm_release_private;
2098 file->private_data = pcm_file;
2103 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2105 struct snd_pcm *pcm;
2106 int err = nonseekable_open(inode, file);
2109 pcm = snd_lookup_minor_data(iminor(inode),
2110 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2111 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2114 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2116 struct snd_pcm *pcm;
2117 int err = nonseekable_open(inode, file);
2120 pcm = snd_lookup_minor_data(iminor(inode),
2121 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2122 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2125 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2134 err = snd_card_file_add(pcm->card, file);
2137 if (!try_module_get(pcm->card->module)) {
2141 init_waitqueue_entry(&wait, current);
2142 add_wait_queue(&pcm->open_wait, &wait);
2143 mutex_lock(&pcm->open_mutex);
2145 err = snd_pcm_open_file(file, pcm, stream);
2148 if (err == -EAGAIN) {
2149 if (file->f_flags & O_NONBLOCK) {
2155 set_current_state(TASK_INTERRUPTIBLE);
2156 mutex_unlock(&pcm->open_mutex);
2158 mutex_lock(&pcm->open_mutex);
2159 if (signal_pending(current)) {
2164 remove_wait_queue(&pcm->open_wait, &wait);
2165 mutex_unlock(&pcm->open_mutex);
2171 module_put(pcm->card->module);
2173 snd_card_file_remove(pcm->card, file);
2178 static int snd_pcm_release(struct inode *inode, struct file *file)
2180 struct snd_pcm *pcm;
2181 struct snd_pcm_substream *substream;
2182 struct snd_pcm_file *pcm_file;
2184 pcm_file = file->private_data;
2185 substream = pcm_file->substream;
2186 if (snd_BUG_ON(!substream))
2188 pcm = substream->pcm;
2189 mutex_lock(&pcm->open_mutex);
2190 snd_pcm_release_substream(substream);
2192 mutex_unlock(&pcm->open_mutex);
2193 wake_up(&pcm->open_wait);
2194 module_put(pcm->card->module);
2195 snd_card_file_remove(pcm->card, file);
2199 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2200 snd_pcm_uframes_t frames)
2202 struct snd_pcm_runtime *runtime = substream->runtime;
2203 snd_pcm_sframes_t appl_ptr;
2204 snd_pcm_sframes_t ret;
2205 snd_pcm_sframes_t hw_avail;
2210 snd_pcm_stream_lock_irq(substream);
2211 switch (runtime->status->state) {
2212 case SNDRV_PCM_STATE_PREPARED:
2214 case SNDRV_PCM_STATE_DRAINING:
2215 case SNDRV_PCM_STATE_RUNNING:
2216 if (snd_pcm_update_hw_ptr(substream) >= 0)
2219 case SNDRV_PCM_STATE_XRUN:
2222 case SNDRV_PCM_STATE_SUSPENDED:
2230 hw_avail = snd_pcm_playback_hw_avail(runtime);
2231 if (hw_avail <= 0) {
2235 if (frames > (snd_pcm_uframes_t)hw_avail)
2237 appl_ptr = runtime->control->appl_ptr - frames;
2239 appl_ptr += runtime->boundary;
2240 runtime->control->appl_ptr = appl_ptr;
2243 snd_pcm_stream_unlock_irq(substream);
2247 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2248 snd_pcm_uframes_t frames)
2250 struct snd_pcm_runtime *runtime = substream->runtime;
2251 snd_pcm_sframes_t appl_ptr;
2252 snd_pcm_sframes_t ret;
2253 snd_pcm_sframes_t hw_avail;
2258 snd_pcm_stream_lock_irq(substream);
2259 switch (runtime->status->state) {
2260 case SNDRV_PCM_STATE_PREPARED:
2261 case SNDRV_PCM_STATE_DRAINING:
2263 case SNDRV_PCM_STATE_RUNNING:
2264 if (snd_pcm_update_hw_ptr(substream) >= 0)
2267 case SNDRV_PCM_STATE_XRUN:
2270 case SNDRV_PCM_STATE_SUSPENDED:
2278 hw_avail = snd_pcm_capture_hw_avail(runtime);
2279 if (hw_avail <= 0) {
2283 if (frames > (snd_pcm_uframes_t)hw_avail)
2285 appl_ptr = runtime->control->appl_ptr - frames;
2287 appl_ptr += runtime->boundary;
2288 runtime->control->appl_ptr = appl_ptr;
2291 snd_pcm_stream_unlock_irq(substream);
2295 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2296 snd_pcm_uframes_t frames)
2298 struct snd_pcm_runtime *runtime = substream->runtime;
2299 snd_pcm_sframes_t appl_ptr;
2300 snd_pcm_sframes_t ret;
2301 snd_pcm_sframes_t avail;
2306 snd_pcm_stream_lock_irq(substream);
2307 switch (runtime->status->state) {
2308 case SNDRV_PCM_STATE_PREPARED:
2309 case SNDRV_PCM_STATE_PAUSED:
2311 case SNDRV_PCM_STATE_DRAINING:
2312 case SNDRV_PCM_STATE_RUNNING:
2313 if (snd_pcm_update_hw_ptr(substream) >= 0)
2316 case SNDRV_PCM_STATE_XRUN:
2319 case SNDRV_PCM_STATE_SUSPENDED:
2327 avail = snd_pcm_playback_avail(runtime);
2332 if (frames > (snd_pcm_uframes_t)avail)
2334 appl_ptr = runtime->control->appl_ptr + frames;
2335 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2336 appl_ptr -= runtime->boundary;
2337 runtime->control->appl_ptr = appl_ptr;
2340 snd_pcm_stream_unlock_irq(substream);
2344 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2345 snd_pcm_uframes_t frames)
2347 struct snd_pcm_runtime *runtime = substream->runtime;
2348 snd_pcm_sframes_t appl_ptr;
2349 snd_pcm_sframes_t ret;
2350 snd_pcm_sframes_t avail;
2355 snd_pcm_stream_lock_irq(substream);
2356 switch (runtime->status->state) {
2357 case SNDRV_PCM_STATE_PREPARED:
2358 case SNDRV_PCM_STATE_DRAINING:
2359 case SNDRV_PCM_STATE_PAUSED:
2361 case SNDRV_PCM_STATE_RUNNING:
2362 if (snd_pcm_update_hw_ptr(substream) >= 0)
2365 case SNDRV_PCM_STATE_XRUN:
2368 case SNDRV_PCM_STATE_SUSPENDED:
2376 avail = snd_pcm_capture_avail(runtime);
2381 if (frames > (snd_pcm_uframes_t)avail)
2383 appl_ptr = runtime->control->appl_ptr + frames;
2384 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2385 appl_ptr -= runtime->boundary;
2386 runtime->control->appl_ptr = appl_ptr;
2389 snd_pcm_stream_unlock_irq(substream);
2393 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2395 struct snd_pcm_runtime *runtime = substream->runtime;
2398 snd_pcm_stream_lock_irq(substream);
2399 switch (runtime->status->state) {
2400 case SNDRV_PCM_STATE_DRAINING:
2401 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2403 case SNDRV_PCM_STATE_RUNNING:
2404 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2407 case SNDRV_PCM_STATE_PREPARED:
2408 case SNDRV_PCM_STATE_SUSPENDED:
2411 case SNDRV_PCM_STATE_XRUN:
2419 snd_pcm_stream_unlock_irq(substream);
2423 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2424 snd_pcm_sframes_t __user *res)
2426 struct snd_pcm_runtime *runtime = substream->runtime;
2428 snd_pcm_sframes_t n = 0;
2430 snd_pcm_stream_lock_irq(substream);
2431 switch (runtime->status->state) {
2432 case SNDRV_PCM_STATE_DRAINING:
2433 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2435 case SNDRV_PCM_STATE_RUNNING:
2436 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2439 case SNDRV_PCM_STATE_PREPARED:
2440 case SNDRV_PCM_STATE_SUSPENDED:
2442 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2443 n = snd_pcm_playback_hw_avail(runtime);
2445 n = snd_pcm_capture_avail(runtime);
2446 n += runtime->delay;
2448 case SNDRV_PCM_STATE_XRUN:
2456 snd_pcm_stream_unlock_irq(substream);
2458 if (put_user(n, res))
2463 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2464 struct snd_pcm_sync_ptr __user *_sync_ptr)
2466 struct snd_pcm_runtime *runtime = substream->runtime;
2467 struct snd_pcm_sync_ptr sync_ptr;
2468 volatile struct snd_pcm_mmap_status *status;
2469 volatile struct snd_pcm_mmap_control *control;
2472 memset(&sync_ptr, 0, sizeof(sync_ptr));
2473 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2475 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2477 status = runtime->status;
2478 control = runtime->control;
2479 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2480 err = snd_pcm_hwsync(substream);
2484 snd_pcm_stream_lock_irq(substream);
2485 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2486 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2488 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2489 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2490 control->avail_min = sync_ptr.c.control.avail_min;
2492 sync_ptr.c.control.avail_min = control->avail_min;
2493 sync_ptr.s.status.state = status->state;
2494 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2495 sync_ptr.s.status.tstamp = status->tstamp;
2496 sync_ptr.s.status.suspended_state = status->suspended_state;
2497 snd_pcm_stream_unlock_irq(substream);
2498 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2503 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2505 struct snd_pcm_runtime *runtime = substream->runtime;
2508 if (get_user(arg, _arg))
2510 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2512 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2513 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2514 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2518 static int snd_pcm_common_ioctl1(struct file *file,
2519 struct snd_pcm_substream *substream,
2520 unsigned int cmd, void __user *arg)
2523 case SNDRV_PCM_IOCTL_PVERSION:
2524 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2525 case SNDRV_PCM_IOCTL_INFO:
2526 return snd_pcm_info_user(substream, arg);
2527 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2529 case SNDRV_PCM_IOCTL_TTSTAMP:
2530 return snd_pcm_tstamp(substream, arg);
2531 case SNDRV_PCM_IOCTL_HW_REFINE:
2532 return snd_pcm_hw_refine_user(substream, arg);
2533 case SNDRV_PCM_IOCTL_HW_PARAMS:
2534 return snd_pcm_hw_params_user(substream, arg);
2535 case SNDRV_PCM_IOCTL_HW_FREE:
2536 return snd_pcm_hw_free(substream);
2537 case SNDRV_PCM_IOCTL_SW_PARAMS:
2538 return snd_pcm_sw_params_user(substream, arg);
2539 case SNDRV_PCM_IOCTL_STATUS:
2540 return snd_pcm_status_user(substream, arg);
2541 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2542 return snd_pcm_channel_info_user(substream, arg);
2543 case SNDRV_PCM_IOCTL_PREPARE:
2544 return snd_pcm_prepare(substream, file);
2545 case SNDRV_PCM_IOCTL_RESET:
2546 return snd_pcm_reset(substream);
2547 case SNDRV_PCM_IOCTL_START:
2548 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2549 case SNDRV_PCM_IOCTL_LINK:
2550 return snd_pcm_link(substream, (int)(unsigned long) arg);
2551 case SNDRV_PCM_IOCTL_UNLINK:
2552 return snd_pcm_unlink(substream);
2553 case SNDRV_PCM_IOCTL_RESUME:
2554 return snd_pcm_resume(substream);
2555 case SNDRV_PCM_IOCTL_XRUN:
2556 return snd_pcm_xrun(substream);
2557 case SNDRV_PCM_IOCTL_HWSYNC:
2558 return snd_pcm_hwsync(substream);
2559 case SNDRV_PCM_IOCTL_DELAY:
2560 return snd_pcm_delay(substream, arg);
2561 case SNDRV_PCM_IOCTL_SYNC_PTR:
2562 return snd_pcm_sync_ptr(substream, arg);
2563 #ifdef CONFIG_SND_SUPPORT_OLD_API
2564 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2565 return snd_pcm_hw_refine_old_user(substream, arg);
2566 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2567 return snd_pcm_hw_params_old_user(substream, arg);
2569 case SNDRV_PCM_IOCTL_DRAIN:
2570 return snd_pcm_drain(substream, file);
2571 case SNDRV_PCM_IOCTL_DROP:
2572 return snd_pcm_drop(substream);
2573 case SNDRV_PCM_IOCTL_PAUSE:
2576 snd_pcm_stream_lock_irq(substream);
2577 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2578 snd_pcm_stream_unlock_irq(substream);
2582 snd_printd("unknown ioctl = 0x%x\n", cmd);
2586 static int snd_pcm_playback_ioctl1(struct file *file,
2587 struct snd_pcm_substream *substream,
2588 unsigned int cmd, void __user *arg)
2590 if (snd_BUG_ON(!substream))
2592 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2595 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2597 struct snd_xferi xferi;
2598 struct snd_xferi __user *_xferi = arg;
2599 struct snd_pcm_runtime *runtime = substream->runtime;
2600 snd_pcm_sframes_t result;
2601 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2603 if (put_user(0, &_xferi->result))
2605 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2607 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2608 __put_user(result, &_xferi->result);
2609 return result < 0 ? result : 0;
2611 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2613 struct snd_xfern xfern;
2614 struct snd_xfern __user *_xfern = arg;
2615 struct snd_pcm_runtime *runtime = substream->runtime;
2617 snd_pcm_sframes_t result;
2618 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2620 if (runtime->channels > 128)
2622 if (put_user(0, &_xfern->result))
2624 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2627 bufs = memdup_user(xfern.bufs,
2628 sizeof(void *) * runtime->channels);
2630 return PTR_ERR(bufs);
2631 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2633 __put_user(result, &_xfern->result);
2634 return result < 0 ? result : 0;
2636 case SNDRV_PCM_IOCTL_REWIND:
2638 snd_pcm_uframes_t frames;
2639 snd_pcm_uframes_t __user *_frames = arg;
2640 snd_pcm_sframes_t result;
2641 if (get_user(frames, _frames))
2643 if (put_user(0, _frames))
2645 result = snd_pcm_playback_rewind(substream, frames);
2646 __put_user(result, _frames);
2647 return result < 0 ? result : 0;
2649 case SNDRV_PCM_IOCTL_FORWARD:
2651 snd_pcm_uframes_t frames;
2652 snd_pcm_uframes_t __user *_frames = arg;
2653 snd_pcm_sframes_t result;
2654 if (get_user(frames, _frames))
2656 if (put_user(0, _frames))
2658 result = snd_pcm_playback_forward(substream, frames);
2659 __put_user(result, _frames);
2660 return result < 0 ? result : 0;
2663 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2666 static int snd_pcm_capture_ioctl1(struct file *file,
2667 struct snd_pcm_substream *substream,
2668 unsigned int cmd, void __user *arg)
2670 if (snd_BUG_ON(!substream))
2672 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2675 case SNDRV_PCM_IOCTL_READI_FRAMES:
2677 struct snd_xferi xferi;
2678 struct snd_xferi __user *_xferi = arg;
2679 struct snd_pcm_runtime *runtime = substream->runtime;
2680 snd_pcm_sframes_t result;
2681 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2683 if (put_user(0, &_xferi->result))
2685 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2687 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2688 __put_user(result, &_xferi->result);
2689 return result < 0 ? result : 0;
2691 case SNDRV_PCM_IOCTL_READN_FRAMES:
2693 struct snd_xfern xfern;
2694 struct snd_xfern __user *_xfern = arg;
2695 struct snd_pcm_runtime *runtime = substream->runtime;
2697 snd_pcm_sframes_t result;
2698 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2700 if (runtime->channels > 128)
2702 if (put_user(0, &_xfern->result))
2704 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2707 bufs = memdup_user(xfern.bufs,
2708 sizeof(void *) * runtime->channels);
2710 return PTR_ERR(bufs);
2711 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2713 __put_user(result, &_xfern->result);
2714 return result < 0 ? result : 0;
2716 case SNDRV_PCM_IOCTL_REWIND:
2718 snd_pcm_uframes_t frames;
2719 snd_pcm_uframes_t __user *_frames = arg;
2720 snd_pcm_sframes_t result;
2721 if (get_user(frames, _frames))
2723 if (put_user(0, _frames))
2725 result = snd_pcm_capture_rewind(substream, frames);
2726 __put_user(result, _frames);
2727 return result < 0 ? result : 0;
2729 case SNDRV_PCM_IOCTL_FORWARD:
2731 snd_pcm_uframes_t frames;
2732 snd_pcm_uframes_t __user *_frames = arg;
2733 snd_pcm_sframes_t result;
2734 if (get_user(frames, _frames))
2736 if (put_user(0, _frames))
2738 result = snd_pcm_capture_forward(substream, frames);
2739 __put_user(result, _frames);
2740 return result < 0 ? result : 0;
2743 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2746 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2749 struct snd_pcm_file *pcm_file;
2751 pcm_file = file->private_data;
2753 if (((cmd >> 8) & 0xff) != 'A')
2756 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2757 (void __user *)arg);
2760 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2763 struct snd_pcm_file *pcm_file;
2765 pcm_file = file->private_data;
2767 if (((cmd >> 8) & 0xff) != 'A')
2770 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2771 (void __user *)arg);
2774 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2775 unsigned int cmd, void *arg)
2780 fs = snd_enter_user();
2781 switch (substream->stream) {
2782 case SNDRV_PCM_STREAM_PLAYBACK:
2783 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2784 (void __user *)arg);
2786 case SNDRV_PCM_STREAM_CAPTURE:
2787 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2788 (void __user *)arg);
2798 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2800 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2803 struct snd_pcm_file *pcm_file;
2804 struct snd_pcm_substream *substream;
2805 struct snd_pcm_runtime *runtime;
2806 snd_pcm_sframes_t result;
2808 pcm_file = file->private_data;
2809 substream = pcm_file->substream;
2810 if (PCM_RUNTIME_CHECK(substream))
2812 runtime = substream->runtime;
2813 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2815 if (!frame_aligned(runtime, count))
2817 count = bytes_to_frames(runtime, count);
2818 result = snd_pcm_lib_read(substream, buf, count);
2820 result = frames_to_bytes(runtime, result);
2824 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2825 size_t count, loff_t * offset)
2827 struct snd_pcm_file *pcm_file;
2828 struct snd_pcm_substream *substream;
2829 struct snd_pcm_runtime *runtime;
2830 snd_pcm_sframes_t result;
2832 pcm_file = file->private_data;
2833 substream = pcm_file->substream;
2834 if (PCM_RUNTIME_CHECK(substream))
2836 runtime = substream->runtime;
2837 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2839 if (!frame_aligned(runtime, count))
2841 count = bytes_to_frames(runtime, count);
2842 result = snd_pcm_lib_write(substream, buf, count);
2844 result = frames_to_bytes(runtime, result);
2848 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2849 unsigned long nr_segs, loff_t pos)
2852 struct snd_pcm_file *pcm_file;
2853 struct snd_pcm_substream *substream;
2854 struct snd_pcm_runtime *runtime;
2855 snd_pcm_sframes_t result;
2858 snd_pcm_uframes_t frames;
2860 pcm_file = iocb->ki_filp->private_data;
2861 substream = pcm_file->substream;
2862 if (PCM_RUNTIME_CHECK(substream))
2864 runtime = substream->runtime;
2865 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2867 if (nr_segs > 1024 || nr_segs != runtime->channels)
2869 if (!frame_aligned(runtime, iov->iov_len))
2871 frames = bytes_to_samples(runtime, iov->iov_len);
2872 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2875 for (i = 0; i < nr_segs; ++i)
2876 bufs[i] = iov[i].iov_base;
2877 result = snd_pcm_lib_readv(substream, bufs, frames);
2879 result = frames_to_bytes(runtime, result);
2884 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2885 unsigned long nr_segs, loff_t pos)
2887 struct snd_pcm_file *pcm_file;
2888 struct snd_pcm_substream *substream;
2889 struct snd_pcm_runtime *runtime;
2890 snd_pcm_sframes_t result;
2893 snd_pcm_uframes_t frames;
2895 pcm_file = iocb->ki_filp->private_data;
2896 substream = pcm_file->substream;
2897 if (PCM_RUNTIME_CHECK(substream))
2899 runtime = substream->runtime;
2900 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2902 if (nr_segs > 128 || nr_segs != runtime->channels ||
2903 !frame_aligned(runtime, iov->iov_len))
2905 frames = bytes_to_samples(runtime, iov->iov_len);
2906 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2909 for (i = 0; i < nr_segs; ++i)
2910 bufs[i] = iov[i].iov_base;
2911 result = snd_pcm_lib_writev(substream, bufs, frames);
2913 result = frames_to_bytes(runtime, result);
2918 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2920 struct snd_pcm_file *pcm_file;
2921 struct snd_pcm_substream *substream;
2922 struct snd_pcm_runtime *runtime;
2924 snd_pcm_uframes_t avail;
2926 pcm_file = file->private_data;
2928 substream = pcm_file->substream;
2929 if (PCM_RUNTIME_CHECK(substream))
2931 runtime = substream->runtime;
2933 poll_wait(file, &runtime->sleep, wait);
2935 snd_pcm_stream_lock_irq(substream);
2936 avail = snd_pcm_playback_avail(runtime);
2937 switch (runtime->status->state) {
2938 case SNDRV_PCM_STATE_RUNNING:
2939 case SNDRV_PCM_STATE_PREPARED:
2940 case SNDRV_PCM_STATE_PAUSED:
2941 if (avail >= runtime->control->avail_min) {
2942 mask = POLLOUT | POLLWRNORM;
2946 case SNDRV_PCM_STATE_DRAINING:
2950 mask = POLLOUT | POLLWRNORM | POLLERR;
2953 snd_pcm_stream_unlock_irq(substream);
2957 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2959 struct snd_pcm_file *pcm_file;
2960 struct snd_pcm_substream *substream;
2961 struct snd_pcm_runtime *runtime;
2963 snd_pcm_uframes_t avail;
2965 pcm_file = file->private_data;
2967 substream = pcm_file->substream;
2968 if (PCM_RUNTIME_CHECK(substream))
2970 runtime = substream->runtime;
2972 poll_wait(file, &runtime->sleep, wait);
2974 snd_pcm_stream_lock_irq(substream);
2975 avail = snd_pcm_capture_avail(runtime);
2976 switch (runtime->status->state) {
2977 case SNDRV_PCM_STATE_RUNNING:
2978 case SNDRV_PCM_STATE_PREPARED:
2979 case SNDRV_PCM_STATE_PAUSED:
2980 if (avail >= runtime->control->avail_min) {
2981 mask = POLLIN | POLLRDNORM;
2986 case SNDRV_PCM_STATE_DRAINING:
2988 mask = POLLIN | POLLRDNORM;
2993 mask = POLLIN | POLLRDNORM | POLLERR;
2996 snd_pcm_stream_unlock_irq(substream);
3005 * Only on coherent architectures, we can mmap the status and the control records
3006 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3008 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3010 * mmap status record
3012 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3013 struct vm_fault *vmf)
3015 struct snd_pcm_substream *substream = area->vm_private_data;
3016 struct snd_pcm_runtime *runtime;
3018 if (substream == NULL)
3019 return VM_FAULT_SIGBUS;
3020 runtime = substream->runtime;
3021 vmf->page = virt_to_page(runtime->status);
3022 get_page(vmf->page);
3026 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3028 .fault = snd_pcm_mmap_status_fault,
3031 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3032 struct vm_area_struct *area)
3035 if (!(area->vm_flags & VM_READ))
3037 size = area->vm_end - area->vm_start;
3038 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3040 area->vm_ops = &snd_pcm_vm_ops_status;
3041 area->vm_private_data = substream;
3042 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3047 * mmap control record
3049 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3050 struct vm_fault *vmf)
3052 struct snd_pcm_substream *substream = area->vm_private_data;
3053 struct snd_pcm_runtime *runtime;
3055 if (substream == NULL)
3056 return VM_FAULT_SIGBUS;
3057 runtime = substream->runtime;
3058 vmf->page = virt_to_page(runtime->control);
3059 get_page(vmf->page);
3063 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3065 .fault = snd_pcm_mmap_control_fault,
3068 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3069 struct vm_area_struct *area)
3072 if (!(area->vm_flags & VM_READ))
3074 size = area->vm_end - area->vm_start;
3075 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3077 area->vm_ops = &snd_pcm_vm_ops_control;
3078 area->vm_private_data = substream;
3079 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3082 #else /* ! coherent mmap */
3084 * don't support mmap for status and control records.
3086 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3087 struct vm_area_struct *area)
3091 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3092 struct vm_area_struct *area)
3096 #endif /* coherent mmap */
3098 static inline struct page *
3099 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3101 void *vaddr = substream->runtime->dma_area + ofs;
3102 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3103 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3104 return virt_to_page(CAC_ADDR(vaddr));
3106 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3107 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3108 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3109 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3110 /* assume dma_handle set via pfn_to_phys() in
3111 * mm/dma-noncoherent.c
3113 return pfn_to_page(addr >> PAGE_SHIFT);
3116 return virt_to_page(vaddr);
3120 * fault callback for mmapping a RAM page
3122 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3123 struct vm_fault *vmf)
3125 struct snd_pcm_substream *substream = area->vm_private_data;
3126 struct snd_pcm_runtime *runtime;
3127 unsigned long offset;
3131 if (substream == NULL)
3132 return VM_FAULT_SIGBUS;
3133 runtime = substream->runtime;
3134 offset = vmf->pgoff << PAGE_SHIFT;
3135 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3136 if (offset > dma_bytes - PAGE_SIZE)
3137 return VM_FAULT_SIGBUS;
3138 if (substream->ops->page)
3139 page = substream->ops->page(substream, offset);
3141 page = snd_pcm_default_page_ops(substream, offset);
3143 return VM_FAULT_SIGBUS;
3149 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3150 .open = snd_pcm_mmap_data_open,
3151 .close = snd_pcm_mmap_data_close,
3154 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3155 .open = snd_pcm_mmap_data_open,
3156 .close = snd_pcm_mmap_data_close,
3157 .fault = snd_pcm_mmap_data_fault,
3160 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3161 /* This should be defined / handled globally! */
3163 #define ARCH_HAS_DMA_MMAP_COHERENT
3168 * mmap the DMA buffer on RAM
3170 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3171 struct vm_area_struct *area)
3173 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3174 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3175 if (!substream->ops->page &&
3176 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3177 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3179 substream->runtime->dma_area,
3180 substream->runtime->dma_addr,
3181 area->vm_end - area->vm_start);
3182 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3183 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3184 !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3185 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3186 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3187 /* mmap with fault handler */
3188 area->vm_ops = &snd_pcm_vm_ops_data_fault;
3191 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3194 * mmap the DMA buffer on I/O memory area
3196 #if SNDRV_PCM_INFO_MMAP_IOMEM
3197 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3198 struct vm_area_struct *area)
3201 unsigned long offset;
3203 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3204 area->vm_flags |= VM_IO;
3205 size = area->vm_end - area->vm_start;
3206 offset = area->vm_pgoff << PAGE_SHIFT;
3207 if (io_remap_pfn_range(area, area->vm_start,
3208 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3209 size, area->vm_page_prot))
3214 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3215 #endif /* SNDRV_PCM_INFO_MMAP */
3220 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3221 struct vm_area_struct *area)
3223 struct snd_pcm_runtime *runtime;
3225 unsigned long offset;
3229 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3230 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3233 if (!(area->vm_flags & VM_READ))
3236 runtime = substream->runtime;
3237 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3239 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3241 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3242 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3244 size = area->vm_end - area->vm_start;
3245 offset = area->vm_pgoff << PAGE_SHIFT;
3246 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3247 if ((size_t)size > dma_bytes)
3249 if (offset > dma_bytes - size)
3252 area->vm_ops = &snd_pcm_vm_ops_data;
3253 area->vm_private_data = substream;
3254 if (substream->ops->mmap)
3255 err = substream->ops->mmap(substream, area);
3257 err = snd_pcm_lib_default_mmap(substream, area);
3259 atomic_inc(&substream->mmap_count);
3263 EXPORT_SYMBOL(snd_pcm_mmap_data);
3265 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3267 struct snd_pcm_file * pcm_file;
3268 struct snd_pcm_substream *substream;
3269 unsigned long offset;
3271 pcm_file = file->private_data;
3272 substream = pcm_file->substream;
3273 if (PCM_RUNTIME_CHECK(substream))
3276 offset = area->vm_pgoff << PAGE_SHIFT;
3278 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3279 if (pcm_file->no_compat_mmap)
3281 return snd_pcm_mmap_status(substream, file, area);
3282 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3283 if (pcm_file->no_compat_mmap)
3285 return snd_pcm_mmap_control(substream, file, area);
3287 return snd_pcm_mmap_data(substream, file, area);
3292 static int snd_pcm_fasync(int fd, struct file * file, int on)
3294 struct snd_pcm_file * pcm_file;
3295 struct snd_pcm_substream *substream;
3296 struct snd_pcm_runtime *runtime;
3298 pcm_file = file->private_data;
3299 substream = pcm_file->substream;
3300 if (PCM_RUNTIME_CHECK(substream))
3302 runtime = substream->runtime;
3303 return fasync_helper(fd, file, on, &runtime->fasync);
3309 #ifdef CONFIG_COMPAT
3310 #include "pcm_compat.c"
3312 #define snd_pcm_ioctl_compat NULL
3316 * To be removed helpers to keep binary compatibility
3319 #ifdef CONFIG_SND_SUPPORT_OLD_API
3320 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3321 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3323 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3324 struct snd_pcm_hw_params_old *oparams)
3328 memset(params, 0, sizeof(*params));
3329 params->flags = oparams->flags;
3330 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3331 params->masks[i].bits[0] = oparams->masks[i];
3332 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3333 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3334 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3335 params->info = oparams->info;
3336 params->msbits = oparams->msbits;
3337 params->rate_num = oparams->rate_num;
3338 params->rate_den = oparams->rate_den;
3339 params->fifo_size = oparams->fifo_size;
3342 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3343 struct snd_pcm_hw_params *params)
3347 memset(oparams, 0, sizeof(*oparams));
3348 oparams->flags = params->flags;
3349 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3350 oparams->masks[i] = params->masks[i].bits[0];
3351 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3352 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3353 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3354 oparams->info = params->info;
3355 oparams->msbits = params->msbits;
3356 oparams->rate_num = params->rate_num;
3357 oparams->rate_den = params->rate_den;
3358 oparams->fifo_size = params->fifo_size;
3361 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3362 struct snd_pcm_hw_params_old __user * _oparams)
3364 struct snd_pcm_hw_params *params;
3365 struct snd_pcm_hw_params_old *oparams = NULL;
3368 params = kmalloc(sizeof(*params), GFP_KERNEL);
3372 oparams = memdup_user(_oparams, sizeof(*oparams));
3373 if (IS_ERR(oparams)) {
3374 err = PTR_ERR(oparams);
3377 snd_pcm_hw_convert_from_old_params(params, oparams);
3378 err = snd_pcm_hw_refine(substream, params);
3379 snd_pcm_hw_convert_to_old_params(oparams, params);
3380 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3391 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3392 struct snd_pcm_hw_params_old __user * _oparams)
3394 struct snd_pcm_hw_params *params;
3395 struct snd_pcm_hw_params_old *oparams = NULL;
3398 params = kmalloc(sizeof(*params), GFP_KERNEL);
3402 oparams = memdup_user(_oparams, sizeof(*oparams));
3403 if (IS_ERR(oparams)) {
3404 err = PTR_ERR(oparams);
3407 snd_pcm_hw_convert_from_old_params(params, oparams);
3408 err = snd_pcm_hw_params(substream, params);
3409 snd_pcm_hw_convert_to_old_params(oparams, params);
3410 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3420 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3423 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3426 unsigned long pgoff,
3427 unsigned long flags)
3429 struct snd_pcm_file *pcm_file = file->private_data;
3430 struct snd_pcm_substream *substream = pcm_file->substream;
3431 struct snd_pcm_runtime *runtime = substream->runtime;
3432 unsigned long offset = pgoff << PAGE_SHIFT;
3435 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3436 return (unsigned long)runtime->status;
3437 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3438 return (unsigned long)runtime->control;
3440 return (unsigned long)runtime->dma_area + offset;
3444 # define snd_pcm_get_unmapped_area NULL
3451 const struct file_operations snd_pcm_f_ops[2] = {
3453 .owner = THIS_MODULE,
3454 .write = snd_pcm_write,
3455 .aio_write = snd_pcm_aio_write,
3456 .open = snd_pcm_playback_open,
3457 .release = snd_pcm_release,
3458 .llseek = no_llseek,
3459 .poll = snd_pcm_playback_poll,
3460 .unlocked_ioctl = snd_pcm_playback_ioctl,
3461 .compat_ioctl = snd_pcm_ioctl_compat,
3462 .mmap = snd_pcm_mmap,
3463 .fasync = snd_pcm_fasync,
3464 .get_unmapped_area = snd_pcm_get_unmapped_area,
3467 .owner = THIS_MODULE,
3468 .read = snd_pcm_read,
3469 .aio_read = snd_pcm_aio_read,
3470 .open = snd_pcm_capture_open,
3471 .release = snd_pcm_release,
3472 .llseek = no_llseek,
3473 .poll = snd_pcm_capture_poll,
3474 .unlocked_ioctl = snd_pcm_capture_ioctl,
3475 .compat_ioctl = snd_pcm_ioctl_compat,
3476 .mmap = snd_pcm_mmap,
3477 .fasync = snd_pcm_fasync,
3478 .get_unmapped_area = snd_pcm_get_unmapped_area,