2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/module.h>
24 #include <linux/file.h>
25 #include <linux/slab.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos.h>
28 #include <linux/aio.h>
29 #include <linux/dma-mapping.h>
30 #include <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/info.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/timer.h>
36 #include <sound/minors.h>
38 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
39 #include <dma-coherence.h>
46 struct snd_pcm_hw_params_old {
48 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
49 SNDRV_PCM_HW_PARAM_ACCESS + 1];
50 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
51 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
56 unsigned int rate_num;
57 unsigned int rate_den;
58 snd_pcm_uframes_t fifo_size;
59 unsigned char reserved[64];
62 #ifdef CONFIG_SND_SUPPORT_OLD_API
63 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
64 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
66 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
67 struct snd_pcm_hw_params_old __user * _oparams);
68 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
69 struct snd_pcm_hw_params_old __user * _oparams);
71 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
77 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 pr_debug("%s = ", snd_pcm_hw_param_names[k]);
194 pr_cont("%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 pr_cont("%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 pr_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 pr_cont("%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 pr_debug("Rule %d [%p]: ", k, r->func);
260 pr_cont("%s = ", snd_pcm_hw_param_names[r->var]);
261 if (hw_is_mask(r->var)) {
262 m = hw_param_mask(params, r->var);
263 pr_cont("%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 pr_cont("%x", *m->bits);
286 i->openmin ? '(' : '[', i->min,
287 i->max, i->openmax ? ')' : ']');
293 if (changed && r->var >= 0) {
294 params->cmask |= (1 << r->var);
295 vstamps[r->var] = stamp;
303 if (!params->msbits) {
304 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
305 if (snd_interval_single(i))
306 params->msbits = snd_interval_value(i);
309 if (!params->rate_den) {
310 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
311 if (snd_interval_single(i)) {
312 params->rate_num = snd_interval_value(i);
313 params->rate_den = 1;
317 hw = &substream->runtime->hw;
319 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
320 if (!params->fifo_size) {
321 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
322 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
323 if (snd_mask_min(m) == snd_mask_max(m) &&
324 snd_interval_min(i) == snd_interval_max(i)) {
325 changed = substream->ops->ioctl(substream,
326 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
335 EXPORT_SYMBOL(snd_pcm_hw_refine);
337 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
338 struct snd_pcm_hw_params __user * _params)
340 struct snd_pcm_hw_params *params;
343 params = memdup_user(_params, sizeof(*params));
345 return PTR_ERR(params);
347 err = snd_pcm_hw_refine(substream, params);
348 if (copy_to_user(_params, params, sizeof(*params))) {
357 static int period_to_usecs(struct snd_pcm_runtime *runtime)
362 return -1; /* invalid */
364 /* take 75% of period time as the deadline */
365 usecs = (750000 / runtime->rate) * runtime->period_size;
366 usecs += ((750000 % runtime->rate) * runtime->period_size) /
372 static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
374 snd_pcm_stream_lock_irq(substream);
375 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
376 substream->runtime->status->state = state;
377 snd_pcm_stream_unlock_irq(substream);
380 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
381 struct snd_pcm_hw_params *params)
383 struct snd_pcm_runtime *runtime;
386 snd_pcm_uframes_t frames;
388 if (PCM_RUNTIME_CHECK(substream))
390 runtime = substream->runtime;
391 snd_pcm_stream_lock_irq(substream);
392 switch (runtime->status->state) {
393 case SNDRV_PCM_STATE_OPEN:
394 case SNDRV_PCM_STATE_SETUP:
395 case SNDRV_PCM_STATE_PREPARED:
398 snd_pcm_stream_unlock_irq(substream);
401 snd_pcm_stream_unlock_irq(substream);
402 #if IS_ENABLED(CONFIG_SND_PCM_OSS)
403 if (!substream->oss.oss)
405 if (atomic_read(&substream->mmap_count))
409 err = snd_pcm_hw_refine(substream, params);
413 err = snd_pcm_hw_params_choose(substream, params);
417 if (substream->ops->hw_params != NULL) {
418 err = substream->ops->hw_params(substream, params);
423 runtime->access = params_access(params);
424 runtime->format = params_format(params);
425 runtime->subformat = params_subformat(params);
426 runtime->channels = params_channels(params);
427 runtime->rate = params_rate(params);
428 runtime->period_size = params_period_size(params);
429 runtime->periods = params_periods(params);
430 runtime->buffer_size = params_buffer_size(params);
431 runtime->info = params->info;
432 runtime->rate_num = params->rate_num;
433 runtime->rate_den = params->rate_den;
434 runtime->no_period_wakeup =
435 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
436 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
438 bits = snd_pcm_format_physical_width(runtime->format);
439 runtime->sample_bits = bits;
440 bits *= runtime->channels;
441 runtime->frame_bits = bits;
443 while (bits % 8 != 0) {
447 runtime->byte_align = bits / 8;
448 runtime->min_align = frames;
450 /* Default sw params */
451 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
452 runtime->period_step = 1;
453 runtime->control->avail_min = runtime->period_size;
454 runtime->start_threshold = 1;
455 runtime->stop_threshold = runtime->buffer_size;
456 runtime->silence_threshold = 0;
457 runtime->silence_size = 0;
458 runtime->boundary = runtime->buffer_size;
459 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
460 runtime->boundary *= 2;
462 snd_pcm_timer_resolution_change(substream);
463 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
465 if (pm_qos_request_active(&substream->latency_pm_qos_req))
466 pm_qos_remove_request(&substream->latency_pm_qos_req);
467 if ((usecs = period_to_usecs(runtime)) >= 0)
468 pm_qos_add_request(&substream->latency_pm_qos_req,
469 PM_QOS_CPU_DMA_LATENCY, usecs);
472 /* hardware might be unusable from this time,
473 so we force application to retry to set
474 the correct hardware parameter settings */
475 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
476 if (substream->ops->hw_free != NULL)
477 substream->ops->hw_free(substream);
481 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
482 struct snd_pcm_hw_params __user * _params)
484 struct snd_pcm_hw_params *params;
487 params = memdup_user(_params, sizeof(*params));
489 return PTR_ERR(params);
491 err = snd_pcm_hw_params(substream, params);
492 if (copy_to_user(_params, params, sizeof(*params))) {
501 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
503 struct snd_pcm_runtime *runtime;
506 if (PCM_RUNTIME_CHECK(substream))
508 runtime = substream->runtime;
509 snd_pcm_stream_lock_irq(substream);
510 switch (runtime->status->state) {
511 case SNDRV_PCM_STATE_SETUP:
512 case SNDRV_PCM_STATE_PREPARED:
515 snd_pcm_stream_unlock_irq(substream);
518 snd_pcm_stream_unlock_irq(substream);
519 if (atomic_read(&substream->mmap_count))
521 if (substream->ops->hw_free)
522 result = substream->ops->hw_free(substream);
523 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
524 pm_qos_remove_request(&substream->latency_pm_qos_req);
528 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
529 struct snd_pcm_sw_params *params)
531 struct snd_pcm_runtime *runtime;
534 if (PCM_RUNTIME_CHECK(substream))
536 runtime = substream->runtime;
537 snd_pcm_stream_lock_irq(substream);
538 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
539 snd_pcm_stream_unlock_irq(substream);
542 snd_pcm_stream_unlock_irq(substream);
544 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
546 if (params->avail_min == 0)
548 if (params->silence_size >= runtime->boundary) {
549 if (params->silence_threshold != 0)
552 if (params->silence_size > params->silence_threshold)
554 if (params->silence_threshold > runtime->buffer_size)
558 snd_pcm_stream_lock_irq(substream);
559 runtime->tstamp_mode = params->tstamp_mode;
560 runtime->period_step = params->period_step;
561 runtime->control->avail_min = params->avail_min;
562 runtime->start_threshold = params->start_threshold;
563 runtime->stop_threshold = params->stop_threshold;
564 runtime->silence_threshold = params->silence_threshold;
565 runtime->silence_size = params->silence_size;
566 params->boundary = runtime->boundary;
567 if (snd_pcm_running(substream)) {
568 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
569 runtime->silence_size > 0)
570 snd_pcm_playback_silence(substream, ULONG_MAX);
571 err = snd_pcm_update_state(substream, runtime);
573 snd_pcm_stream_unlock_irq(substream);
577 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
578 struct snd_pcm_sw_params __user * _params)
580 struct snd_pcm_sw_params params;
582 if (copy_from_user(¶ms, _params, sizeof(params)))
584 err = snd_pcm_sw_params(substream, ¶ms);
585 if (copy_to_user(_params, ¶ms, sizeof(params)))
590 int snd_pcm_status(struct snd_pcm_substream *substream,
591 struct snd_pcm_status *status)
593 struct snd_pcm_runtime *runtime = substream->runtime;
595 snd_pcm_stream_lock_irq(substream);
596 status->state = runtime->status->state;
597 status->suspended_state = runtime->status->suspended_state;
598 if (status->state == SNDRV_PCM_STATE_OPEN)
600 status->trigger_tstamp = runtime->trigger_tstamp;
601 if (snd_pcm_running(substream)) {
602 snd_pcm_update_hw_ptr(substream);
603 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
604 status->tstamp = runtime->status->tstamp;
605 status->audio_tstamp =
606 runtime->status->audio_tstamp;
610 snd_pcm_gettime(runtime, &status->tstamp);
612 status->appl_ptr = runtime->control->appl_ptr;
613 status->hw_ptr = runtime->status->hw_ptr;
614 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
615 status->avail = snd_pcm_playback_avail(runtime);
616 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
617 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
618 status->delay = runtime->buffer_size - status->avail;
619 status->delay += runtime->delay;
623 status->avail = snd_pcm_capture_avail(runtime);
624 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
625 status->delay = status->avail + runtime->delay;
629 status->avail_max = runtime->avail_max;
630 status->overrange = runtime->overrange;
631 runtime->avail_max = 0;
632 runtime->overrange = 0;
634 snd_pcm_stream_unlock_irq(substream);
638 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
639 struct snd_pcm_status __user * _status)
641 struct snd_pcm_status status;
644 memset(&status, 0, sizeof(status));
645 res = snd_pcm_status(substream, &status);
648 if (copy_to_user(_status, &status, sizeof(status)))
653 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
654 struct snd_pcm_channel_info * info)
656 struct snd_pcm_runtime *runtime;
657 unsigned int channel;
659 channel = info->channel;
660 runtime = substream->runtime;
661 snd_pcm_stream_lock_irq(substream);
662 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
663 snd_pcm_stream_unlock_irq(substream);
666 snd_pcm_stream_unlock_irq(substream);
667 if (channel >= runtime->channels)
669 memset(info, 0, sizeof(*info));
670 info->channel = channel;
671 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
674 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
675 struct snd_pcm_channel_info __user * _info)
677 struct snd_pcm_channel_info info;
680 if (copy_from_user(&info, _info, sizeof(info)))
682 res = snd_pcm_channel_info(substream, &info);
685 if (copy_to_user(_info, &info, sizeof(info)))
690 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
692 struct snd_pcm_runtime *runtime = substream->runtime;
693 if (runtime->trigger_master == NULL)
695 if (runtime->trigger_master == substream) {
696 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
698 snd_pcm_trigger_tstamp(runtime->trigger_master);
699 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
701 runtime->trigger_master = NULL;
705 int (*pre_action)(struct snd_pcm_substream *substream, int state);
706 int (*do_action)(struct snd_pcm_substream *substream, int state);
707 void (*undo_action)(struct snd_pcm_substream *substream, int state);
708 void (*post_action)(struct snd_pcm_substream *substream, int state);
712 * this functions is core for handling of linked stream
713 * Note: the stream state might be changed also on failure
714 * Note2: call with calling stream lock + link lock
716 static int snd_pcm_action_group(struct action_ops *ops,
717 struct snd_pcm_substream *substream,
718 int state, int do_lock)
720 struct snd_pcm_substream *s = NULL;
721 struct snd_pcm_substream *s1;
724 snd_pcm_group_for_each_entry(s, substream) {
725 if (do_lock && s != substream)
726 spin_lock_nested(&s->self_group.lock,
727 SINGLE_DEPTH_NESTING);
728 res = ops->pre_action(s, state);
732 snd_pcm_group_for_each_entry(s, substream) {
733 res = ops->do_action(s, state);
735 if (ops->undo_action) {
736 snd_pcm_group_for_each_entry(s1, substream) {
737 if (s1 == s) /* failed stream */
739 ops->undo_action(s1, state);
742 s = NULL; /* unlock all */
746 snd_pcm_group_for_each_entry(s, substream) {
747 ops->post_action(s, state);
752 snd_pcm_group_for_each_entry(s1, substream) {
754 spin_unlock(&s1->self_group.lock);
755 if (s1 == s) /* end */
763 * Note: call with stream lock
765 static int snd_pcm_action_single(struct action_ops *ops,
766 struct snd_pcm_substream *substream,
771 res = ops->pre_action(substream, state);
774 res = ops->do_action(substream, state);
776 ops->post_action(substream, state);
777 else if (ops->undo_action)
778 ops->undo_action(substream, state);
783 * Note: call with stream lock
785 static int snd_pcm_action(struct action_ops *ops,
786 struct snd_pcm_substream *substream,
791 if (snd_pcm_stream_linked(substream)) {
792 if (!spin_trylock(&substream->group->lock)) {
793 spin_unlock(&substream->self_group.lock);
794 spin_lock(&substream->group->lock);
795 spin_lock(&substream->self_group.lock);
797 res = snd_pcm_action_group(ops, substream, state, 1);
798 spin_unlock(&substream->group->lock);
800 res = snd_pcm_action_single(ops, substream, state);
806 * Note: don't use any locks before
808 static int snd_pcm_action_lock_irq(struct action_ops *ops,
809 struct snd_pcm_substream *substream,
814 read_lock_irq(&snd_pcm_link_rwlock);
815 if (snd_pcm_stream_linked(substream)) {
816 spin_lock(&substream->group->lock);
817 spin_lock(&substream->self_group.lock);
818 res = snd_pcm_action_group(ops, substream, state, 1);
819 spin_unlock(&substream->self_group.lock);
820 spin_unlock(&substream->group->lock);
822 spin_lock(&substream->self_group.lock);
823 res = snd_pcm_action_single(ops, substream, state);
824 spin_unlock(&substream->self_group.lock);
826 read_unlock_irq(&snd_pcm_link_rwlock);
832 static int snd_pcm_action_nonatomic(struct action_ops *ops,
833 struct snd_pcm_substream *substream,
838 down_read(&snd_pcm_link_rwsem);
839 if (snd_pcm_stream_linked(substream))
840 res = snd_pcm_action_group(ops, substream, state, 0);
842 res = snd_pcm_action_single(ops, substream, state);
843 up_read(&snd_pcm_link_rwsem);
850 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
852 struct snd_pcm_runtime *runtime = substream->runtime;
853 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
855 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
856 !snd_pcm_playback_data(substream))
858 runtime->trigger_master = substream;
862 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
864 if (substream->runtime->trigger_master != substream)
866 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
869 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
871 if (substream->runtime->trigger_master == substream)
872 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
875 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
877 struct snd_pcm_runtime *runtime = substream->runtime;
878 snd_pcm_trigger_tstamp(substream);
879 runtime->hw_ptr_jiffies = jiffies;
880 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
882 runtime->status->state = state;
883 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
884 runtime->silence_size > 0)
885 snd_pcm_playback_silence(substream, ULONG_MAX);
886 if (substream->timer)
887 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
888 &runtime->trigger_tstamp);
891 static struct action_ops snd_pcm_action_start = {
892 .pre_action = snd_pcm_pre_start,
893 .do_action = snd_pcm_do_start,
894 .undo_action = snd_pcm_undo_start,
895 .post_action = snd_pcm_post_start
899 * snd_pcm_start - start all linked streams
900 * @substream: the PCM substream instance
902 * Return: Zero if successful, or a negative error code.
904 int snd_pcm_start(struct snd_pcm_substream *substream)
906 return snd_pcm_action(&snd_pcm_action_start, substream,
907 SNDRV_PCM_STATE_RUNNING);
913 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
915 struct snd_pcm_runtime *runtime = substream->runtime;
916 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
918 runtime->trigger_master = substream;
922 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
924 if (substream->runtime->trigger_master == substream &&
925 snd_pcm_running(substream))
926 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
927 return 0; /* unconditonally stop all substreams */
930 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
932 struct snd_pcm_runtime *runtime = substream->runtime;
933 if (runtime->status->state != state) {
934 snd_pcm_trigger_tstamp(substream);
935 if (substream->timer)
936 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
937 &runtime->trigger_tstamp);
938 runtime->status->state = state;
940 wake_up(&runtime->sleep);
941 wake_up(&runtime->tsleep);
944 static struct action_ops snd_pcm_action_stop = {
945 .pre_action = snd_pcm_pre_stop,
946 .do_action = snd_pcm_do_stop,
947 .post_action = snd_pcm_post_stop
951 * snd_pcm_stop - try to stop all running streams in the substream group
952 * @substream: the PCM substream instance
953 * @state: PCM state after stopping the stream
955 * The state of each stream is then changed to the given state unconditionally.
957 * Return: Zero if successful, or a negative error code.
959 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
961 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
964 EXPORT_SYMBOL(snd_pcm_stop);
967 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
968 * @substream: the PCM substream
970 * After stopping, the state is changed to SETUP.
971 * Unlike snd_pcm_stop(), this affects only the given stream.
973 * Return: Zero if succesful, or a negative error code.
975 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
977 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
978 SNDRV_PCM_STATE_SETUP);
984 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
986 struct snd_pcm_runtime *runtime = substream->runtime;
987 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
990 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
992 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
994 runtime->trigger_master = substream;
998 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
1000 if (substream->runtime->trigger_master != substream)
1002 /* some drivers might use hw_ptr to recover from the pause -
1003 update the hw_ptr now */
1005 snd_pcm_update_hw_ptr(substream);
1006 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
1007 * a delta between the current jiffies, this gives a large enough
1008 * delta, effectively to skip the check once.
1010 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1011 return substream->ops->trigger(substream,
1012 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1013 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1016 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1018 if (substream->runtime->trigger_master == substream)
1019 substream->ops->trigger(substream,
1020 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1021 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1024 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1026 struct snd_pcm_runtime *runtime = substream->runtime;
1027 snd_pcm_trigger_tstamp(substream);
1029 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1030 if (substream->timer)
1031 snd_timer_notify(substream->timer,
1032 SNDRV_TIMER_EVENT_MPAUSE,
1033 &runtime->trigger_tstamp);
1034 wake_up(&runtime->sleep);
1035 wake_up(&runtime->tsleep);
1037 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1038 if (substream->timer)
1039 snd_timer_notify(substream->timer,
1040 SNDRV_TIMER_EVENT_MCONTINUE,
1041 &runtime->trigger_tstamp);
1045 static struct action_ops snd_pcm_action_pause = {
1046 .pre_action = snd_pcm_pre_pause,
1047 .do_action = snd_pcm_do_pause,
1048 .undo_action = snd_pcm_undo_pause,
1049 .post_action = snd_pcm_post_pause
1053 * Push/release the pause for all linked streams.
1055 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1057 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1063 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1065 struct snd_pcm_runtime *runtime = substream->runtime;
1066 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1068 runtime->trigger_master = substream;
1072 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1074 struct snd_pcm_runtime *runtime = substream->runtime;
1075 if (runtime->trigger_master != substream)
1077 if (! snd_pcm_running(substream))
1079 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1080 return 0; /* suspend unconditionally */
1083 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1085 struct snd_pcm_runtime *runtime = substream->runtime;
1086 snd_pcm_trigger_tstamp(substream);
1087 if (substream->timer)
1088 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1089 &runtime->trigger_tstamp);
1090 runtime->status->suspended_state = runtime->status->state;
1091 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1092 wake_up(&runtime->sleep);
1093 wake_up(&runtime->tsleep);
1096 static struct action_ops snd_pcm_action_suspend = {
1097 .pre_action = snd_pcm_pre_suspend,
1098 .do_action = snd_pcm_do_suspend,
1099 .post_action = snd_pcm_post_suspend
1103 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1104 * @substream: the PCM substream
1106 * After this call, all streams are changed to SUSPENDED state.
1108 * Return: Zero if successful (or @substream is %NULL), or a negative error
1111 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1114 unsigned long flags;
1119 snd_pcm_stream_lock_irqsave(substream, flags);
1120 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1121 snd_pcm_stream_unlock_irqrestore(substream, flags);
1125 EXPORT_SYMBOL(snd_pcm_suspend);
1128 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1129 * @pcm: the PCM instance
1131 * After this call, all streams are changed to SUSPENDED state.
1133 * Return: Zero if successful (or @pcm is %NULL), or a negative error code.
1135 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1137 struct snd_pcm_substream *substream;
1138 int stream, err = 0;
1143 for (stream = 0; stream < 2; stream++) {
1144 for (substream = pcm->streams[stream].substream;
1145 substream; substream = substream->next) {
1146 /* FIXME: the open/close code should lock this as well */
1147 if (substream->runtime == NULL)
1149 err = snd_pcm_suspend(substream);
1150 if (err < 0 && err != -EBUSY)
1157 EXPORT_SYMBOL(snd_pcm_suspend_all);
1161 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1163 struct snd_pcm_runtime *runtime = substream->runtime;
1164 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1166 runtime->trigger_master = substream;
1170 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1172 struct snd_pcm_runtime *runtime = substream->runtime;
1173 if (runtime->trigger_master != substream)
1175 /* DMA not running previously? */
1176 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1177 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1178 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1180 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1183 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1185 if (substream->runtime->trigger_master == substream &&
1186 snd_pcm_running(substream))
1187 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1190 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1192 struct snd_pcm_runtime *runtime = substream->runtime;
1193 snd_pcm_trigger_tstamp(substream);
1194 if (substream->timer)
1195 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1196 &runtime->trigger_tstamp);
1197 runtime->status->state = runtime->status->suspended_state;
1200 static struct action_ops snd_pcm_action_resume = {
1201 .pre_action = snd_pcm_pre_resume,
1202 .do_action = snd_pcm_do_resume,
1203 .undo_action = snd_pcm_undo_resume,
1204 .post_action = snd_pcm_post_resume
1207 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1209 struct snd_card *card = substream->pcm->card;
1212 snd_power_lock(card);
1213 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1214 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1215 snd_power_unlock(card);
1221 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1226 #endif /* CONFIG_PM */
1231 * Change the RUNNING stream(s) to XRUN state.
1233 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1235 struct snd_card *card = substream->pcm->card;
1236 struct snd_pcm_runtime *runtime = substream->runtime;
1239 snd_power_lock(card);
1240 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1241 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1246 snd_pcm_stream_lock_irq(substream);
1247 switch (runtime->status->state) {
1248 case SNDRV_PCM_STATE_XRUN:
1249 result = 0; /* already there */
1251 case SNDRV_PCM_STATE_RUNNING:
1252 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1257 snd_pcm_stream_unlock_irq(substream);
1259 snd_power_unlock(card);
1266 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1268 struct snd_pcm_runtime *runtime = substream->runtime;
1269 switch (runtime->status->state) {
1270 case SNDRV_PCM_STATE_RUNNING:
1271 case SNDRV_PCM_STATE_PREPARED:
1272 case SNDRV_PCM_STATE_PAUSED:
1273 case SNDRV_PCM_STATE_SUSPENDED:
1280 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1282 struct snd_pcm_runtime *runtime = substream->runtime;
1283 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1286 runtime->hw_ptr_base = 0;
1287 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1288 runtime->status->hw_ptr % runtime->period_size;
1289 runtime->silence_start = runtime->status->hw_ptr;
1290 runtime->silence_filled = 0;
1294 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1296 struct snd_pcm_runtime *runtime = substream->runtime;
1297 runtime->control->appl_ptr = runtime->status->hw_ptr;
1298 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1299 runtime->silence_size > 0)
1300 snd_pcm_playback_silence(substream, ULONG_MAX);
1303 static struct action_ops snd_pcm_action_reset = {
1304 .pre_action = snd_pcm_pre_reset,
1305 .do_action = snd_pcm_do_reset,
1306 .post_action = snd_pcm_post_reset
1309 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1311 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1317 /* we use the second argument for updating f_flags */
1318 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1321 struct snd_pcm_runtime *runtime = substream->runtime;
1322 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1323 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1325 if (snd_pcm_running(substream))
1327 substream->f_flags = f_flags;
1331 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1334 err = substream->ops->prepare(substream);
1337 return snd_pcm_do_reset(substream, 0);
1340 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1342 struct snd_pcm_runtime *runtime = substream->runtime;
1343 runtime->control->appl_ptr = runtime->status->hw_ptr;
1344 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1347 static struct action_ops snd_pcm_action_prepare = {
1348 .pre_action = snd_pcm_pre_prepare,
1349 .do_action = snd_pcm_do_prepare,
1350 .post_action = snd_pcm_post_prepare
1354 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1355 * @substream: the PCM substream instance
1356 * @file: file to refer f_flags
1358 * Return: Zero if successful, or a negative error code.
1360 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1364 struct snd_card *card = substream->pcm->card;
1368 f_flags = file->f_flags;
1370 f_flags = substream->f_flags;
1372 snd_power_lock(card);
1373 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1374 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1375 substream, f_flags);
1376 snd_power_unlock(card);
1384 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1386 struct snd_pcm_runtime *runtime = substream->runtime;
1387 switch (runtime->status->state) {
1388 case SNDRV_PCM_STATE_OPEN:
1389 case SNDRV_PCM_STATE_DISCONNECTED:
1390 case SNDRV_PCM_STATE_SUSPENDED:
1393 runtime->trigger_master = substream;
1397 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1399 struct snd_pcm_runtime *runtime = substream->runtime;
1400 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1401 switch (runtime->status->state) {
1402 case SNDRV_PCM_STATE_PREPARED:
1403 /* start playback stream if possible */
1404 if (! snd_pcm_playback_empty(substream)) {
1405 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1406 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1409 case SNDRV_PCM_STATE_RUNNING:
1410 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1412 case SNDRV_PCM_STATE_XRUN:
1413 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1419 /* stop running stream */
1420 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1421 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1422 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1423 snd_pcm_do_stop(substream, new_state);
1424 snd_pcm_post_stop(substream, new_state);
1430 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1434 static struct action_ops snd_pcm_action_drain_init = {
1435 .pre_action = snd_pcm_pre_drain_init,
1436 .do_action = snd_pcm_do_drain_init,
1437 .post_action = snd_pcm_post_drain_init
1440 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1443 * Drain the stream(s).
1444 * When the substream is linked, sync until the draining of all playback streams
1446 * After this call, all streams are supposed to be either SETUP or DRAINING
1447 * (capture only) state.
1449 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1452 struct snd_card *card;
1453 struct snd_pcm_runtime *runtime;
1454 struct snd_pcm_substream *s;
1459 card = substream->pcm->card;
1460 runtime = substream->runtime;
1462 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1465 snd_power_lock(card);
1466 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1467 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1469 snd_power_unlock(card);
1475 if (file->f_flags & O_NONBLOCK)
1477 } else if (substream->f_flags & O_NONBLOCK)
1480 down_read(&snd_pcm_link_rwsem);
1481 snd_pcm_stream_lock_irq(substream);
1483 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1484 snd_pcm_pause(substream, 0);
1486 /* pre-start/stop - all running streams are changed to DRAINING state */
1487 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1490 /* in non-blocking, we don't wait in ioctl but let caller poll */
1498 struct snd_pcm_runtime *to_check;
1499 if (signal_pending(current)) {
1500 result = -ERESTARTSYS;
1503 /* find a substream to drain */
1505 snd_pcm_group_for_each_entry(s, substream) {
1506 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1508 runtime = s->runtime;
1509 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1515 break; /* all drained */
1516 init_waitqueue_entry(&wait, current);
1517 add_wait_queue(&to_check->sleep, &wait);
1518 snd_pcm_stream_unlock_irq(substream);
1519 up_read(&snd_pcm_link_rwsem);
1520 snd_power_unlock(card);
1521 if (runtime->no_period_wakeup)
1522 tout = MAX_SCHEDULE_TIMEOUT;
1525 if (runtime->rate) {
1526 long t = runtime->period_size * 2 / runtime->rate;
1527 tout = max(t, tout);
1529 tout = msecs_to_jiffies(tout * 1000);
1531 tout = schedule_timeout_interruptible(tout);
1532 snd_power_lock(card);
1533 down_read(&snd_pcm_link_rwsem);
1534 snd_pcm_stream_lock_irq(substream);
1535 remove_wait_queue(&to_check->sleep, &wait);
1536 if (card->shutdown) {
1541 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1544 dev_dbg(substream->pcm->card->dev,
1545 "playback drain error (DMA or IRQ trouble?)\n");
1546 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1554 snd_pcm_stream_unlock_irq(substream);
1555 up_read(&snd_pcm_link_rwsem);
1556 snd_power_unlock(card);
1564 * Immediately put all linked substreams into SETUP state.
1566 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1568 struct snd_pcm_runtime *runtime;
1571 if (PCM_RUNTIME_CHECK(substream))
1573 runtime = substream->runtime;
1575 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1576 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1577 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1580 snd_pcm_stream_lock_irq(substream);
1582 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1583 snd_pcm_pause(substream, 0);
1585 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1586 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1587 snd_pcm_stream_unlock_irq(substream);
1593 static bool is_pcm_file(struct file *file)
1595 struct inode *inode = file_inode(file);
1598 if (!S_ISCHR(inode->i_mode) || imajor(inode) != snd_major)
1600 minor = iminor(inode);
1601 return snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) ||
1602 snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE);
1608 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1611 struct snd_pcm_file *pcm_file;
1612 struct snd_pcm_substream *substream1;
1613 struct snd_pcm_group *group;
1614 struct fd f = fdget(fd);
1618 if (!is_pcm_file(f.file)) {
1622 pcm_file = f.file->private_data;
1623 substream1 = pcm_file->substream;
1624 group = kmalloc(sizeof(*group), GFP_KERNEL);
1629 down_write(&snd_pcm_link_rwsem);
1630 write_lock_irq(&snd_pcm_link_rwlock);
1631 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1632 substream->runtime->status->state != substream1->runtime->status->state) {
1636 if (snd_pcm_stream_linked(substream1)) {
1640 if (!snd_pcm_stream_linked(substream)) {
1641 substream->group = group;
1643 spin_lock_init(&substream->group->lock);
1644 INIT_LIST_HEAD(&substream->group->substreams);
1645 list_add_tail(&substream->link_list, &substream->group->substreams);
1646 substream->group->count = 1;
1648 list_add_tail(&substream1->link_list, &substream->group->substreams);
1649 substream->group->count++;
1650 substream1->group = substream->group;
1652 write_unlock_irq(&snd_pcm_link_rwlock);
1653 up_write(&snd_pcm_link_rwsem);
1655 snd_card_unref(substream1->pcm->card);
1662 static void relink_to_local(struct snd_pcm_substream *substream)
1664 substream->group = &substream->self_group;
1665 INIT_LIST_HEAD(&substream->self_group.substreams);
1666 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1669 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1671 struct snd_pcm_substream *s;
1674 down_write(&snd_pcm_link_rwsem);
1675 write_lock_irq(&snd_pcm_link_rwlock);
1676 if (!snd_pcm_stream_linked(substream)) {
1680 list_del(&substream->link_list);
1681 substream->group->count--;
1682 if (substream->group->count == 1) { /* detach the last stream, too */
1683 snd_pcm_group_for_each_entry(s, substream) {
1687 kfree(substream->group);
1689 relink_to_local(substream);
1691 write_unlock_irq(&snd_pcm_link_rwlock);
1692 up_write(&snd_pcm_link_rwsem);
1699 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1700 struct snd_pcm_hw_rule *rule)
1702 struct snd_interval t;
1703 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1704 hw_param_interval_c(params, rule->deps[1]), &t);
1705 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1708 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1709 struct snd_pcm_hw_rule *rule)
1711 struct snd_interval t;
1712 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1713 hw_param_interval_c(params, rule->deps[1]), &t);
1714 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1717 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1718 struct snd_pcm_hw_rule *rule)
1720 struct snd_interval t;
1721 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1722 hw_param_interval_c(params, rule->deps[1]),
1723 (unsigned long) rule->private, &t);
1724 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1727 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1728 struct snd_pcm_hw_rule *rule)
1730 struct snd_interval t;
1731 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1732 (unsigned long) rule->private,
1733 hw_param_interval_c(params, rule->deps[1]), &t);
1734 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1737 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1738 struct snd_pcm_hw_rule *rule)
1741 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1743 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1745 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1747 if (! snd_mask_test(mask, k))
1749 bits = snd_pcm_format_physical_width(k);
1751 continue; /* ignore invalid formats */
1752 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1753 snd_mask_reset(&m, k);
1755 return snd_mask_refine(mask, &m);
1758 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1759 struct snd_pcm_hw_rule *rule)
1761 struct snd_interval t;
1767 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1769 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1771 bits = snd_pcm_format_physical_width(k);
1773 continue; /* ignore invalid formats */
1774 if (t.min > (unsigned)bits)
1776 if (t.max < (unsigned)bits)
1780 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1783 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1784 #error "Change this table"
1787 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1788 48000, 64000, 88200, 96000, 176400, 192000 };
1790 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1791 .count = ARRAY_SIZE(rates),
1795 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1796 struct snd_pcm_hw_rule *rule)
1798 struct snd_pcm_hardware *hw = rule->private;
1799 return snd_interval_list(hw_param_interval(params, rule->var),
1800 snd_pcm_known_rates.count,
1801 snd_pcm_known_rates.list, hw->rates);
1804 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1805 struct snd_pcm_hw_rule *rule)
1807 struct snd_interval t;
1808 struct snd_pcm_substream *substream = rule->private;
1810 t.max = substream->buffer_bytes_max;
1814 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1817 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1819 struct snd_pcm_runtime *runtime = substream->runtime;
1820 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1823 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1824 snd_mask_any(constrs_mask(constrs, k));
1827 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1828 snd_interval_any(constrs_interval(constrs, k));
1831 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1832 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1833 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1834 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1835 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1837 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1838 snd_pcm_hw_rule_format, NULL,
1839 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1842 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1843 snd_pcm_hw_rule_sample_bits, NULL,
1844 SNDRV_PCM_HW_PARAM_FORMAT,
1845 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1848 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1849 snd_pcm_hw_rule_div, NULL,
1850 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1853 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1854 snd_pcm_hw_rule_mul, NULL,
1855 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1858 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1859 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1860 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1863 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1864 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1865 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1868 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1869 snd_pcm_hw_rule_div, NULL,
1870 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1873 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1874 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1875 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1878 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1879 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1880 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1883 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1884 snd_pcm_hw_rule_div, NULL,
1885 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1888 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1889 snd_pcm_hw_rule_div, NULL,
1890 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1893 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1894 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1895 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1898 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1899 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1900 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1903 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1904 snd_pcm_hw_rule_mul, NULL,
1905 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1908 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1909 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1910 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1913 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1914 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1915 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1918 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1919 snd_pcm_hw_rule_muldivk, (void*) 8,
1920 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1923 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1924 snd_pcm_hw_rule_muldivk, (void*) 8,
1925 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1928 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1929 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1930 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1933 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1934 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1935 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1941 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1943 struct snd_pcm_runtime *runtime = substream->runtime;
1944 struct snd_pcm_hardware *hw = &runtime->hw;
1946 unsigned int mask = 0;
1948 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1949 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1950 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1951 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1952 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1953 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1954 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1955 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1956 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1957 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1958 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1960 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1964 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1968 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1972 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1973 hw->channels_min, hw->channels_max);
1977 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1978 hw->rate_min, hw->rate_max);
1982 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1983 hw->period_bytes_min, hw->period_bytes_max);
1987 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1988 hw->periods_min, hw->periods_max);
1992 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1993 hw->period_bytes_min, hw->buffer_bytes_max);
1997 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1998 snd_pcm_hw_rule_buffer_bytes_max, substream,
1999 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
2004 if (runtime->dma_bytes) {
2005 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
2010 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2011 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2012 snd_pcm_hw_rule_rate, hw,
2013 SNDRV_PCM_HW_PARAM_RATE, -1);
2018 /* FIXME: this belong to lowlevel */
2019 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2024 static void pcm_release_private(struct snd_pcm_substream *substream)
2026 snd_pcm_unlink(substream);
2029 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2031 substream->ref_count--;
2032 if (substream->ref_count > 0)
2035 snd_pcm_drop(substream);
2036 if (substream->hw_opened) {
2037 if (substream->ops->hw_free != NULL)
2038 substream->ops->hw_free(substream);
2039 substream->ops->close(substream);
2040 substream->hw_opened = 0;
2042 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2043 pm_qos_remove_request(&substream->latency_pm_qos_req);
2044 if (substream->pcm_release) {
2045 substream->pcm_release(substream);
2046 substream->pcm_release = NULL;
2048 snd_pcm_detach_substream(substream);
2051 EXPORT_SYMBOL(snd_pcm_release_substream);
2053 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2055 struct snd_pcm_substream **rsubstream)
2057 struct snd_pcm_substream *substream;
2060 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2063 if (substream->ref_count > 1) {
2064 *rsubstream = substream;
2068 err = snd_pcm_hw_constraints_init(substream);
2070 pcm_dbg(pcm, "snd_pcm_hw_constraints_init failed\n");
2074 if ((err = substream->ops->open(substream)) < 0)
2077 substream->hw_opened = 1;
2079 err = snd_pcm_hw_constraints_complete(substream);
2081 pcm_dbg(pcm, "snd_pcm_hw_constraints_complete failed\n");
2085 *rsubstream = substream;
2089 snd_pcm_release_substream(substream);
2093 EXPORT_SYMBOL(snd_pcm_open_substream);
2095 static int snd_pcm_open_file(struct file *file,
2096 struct snd_pcm *pcm,
2099 struct snd_pcm_file *pcm_file;
2100 struct snd_pcm_substream *substream;
2103 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2107 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2108 if (pcm_file == NULL) {
2109 snd_pcm_release_substream(substream);
2112 pcm_file->substream = substream;
2113 if (substream->ref_count == 1) {
2114 substream->file = pcm_file;
2115 substream->pcm_release = pcm_release_private;
2117 file->private_data = pcm_file;
2122 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2124 struct snd_pcm *pcm;
2125 int err = nonseekable_open(inode, file);
2128 pcm = snd_lookup_minor_data(iminor(inode),
2129 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2130 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2132 snd_card_unref(pcm->card);
2136 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2138 struct snd_pcm *pcm;
2139 int err = nonseekable_open(inode, file);
2142 pcm = snd_lookup_minor_data(iminor(inode),
2143 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2144 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2146 snd_card_unref(pcm->card);
2150 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2159 err = snd_card_file_add(pcm->card, file);
2162 if (!try_module_get(pcm->card->module)) {
2166 init_waitqueue_entry(&wait, current);
2167 add_wait_queue(&pcm->open_wait, &wait);
2168 mutex_lock(&pcm->open_mutex);
2170 err = snd_pcm_open_file(file, pcm, stream);
2173 if (err == -EAGAIN) {
2174 if (file->f_flags & O_NONBLOCK) {
2180 set_current_state(TASK_INTERRUPTIBLE);
2181 mutex_unlock(&pcm->open_mutex);
2183 mutex_lock(&pcm->open_mutex);
2184 if (pcm->card->shutdown) {
2188 if (signal_pending(current)) {
2193 remove_wait_queue(&pcm->open_wait, &wait);
2194 mutex_unlock(&pcm->open_mutex);
2200 module_put(pcm->card->module);
2202 snd_card_file_remove(pcm->card, file);
2207 static int snd_pcm_release(struct inode *inode, struct file *file)
2209 struct snd_pcm *pcm;
2210 struct snd_pcm_substream *substream;
2211 struct snd_pcm_file *pcm_file;
2213 pcm_file = file->private_data;
2214 substream = pcm_file->substream;
2215 if (snd_BUG_ON(!substream))
2217 pcm = substream->pcm;
2218 mutex_lock(&pcm->open_mutex);
2219 snd_pcm_release_substream(substream);
2221 mutex_unlock(&pcm->open_mutex);
2222 wake_up(&pcm->open_wait);
2223 module_put(pcm->card->module);
2224 snd_card_file_remove(pcm->card, file);
2228 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2229 snd_pcm_uframes_t frames)
2231 struct snd_pcm_runtime *runtime = substream->runtime;
2232 snd_pcm_sframes_t appl_ptr;
2233 snd_pcm_sframes_t ret;
2234 snd_pcm_sframes_t hw_avail;
2239 snd_pcm_stream_lock_irq(substream);
2240 switch (runtime->status->state) {
2241 case SNDRV_PCM_STATE_PREPARED:
2243 case SNDRV_PCM_STATE_DRAINING:
2244 case SNDRV_PCM_STATE_RUNNING:
2245 if (snd_pcm_update_hw_ptr(substream) >= 0)
2248 case SNDRV_PCM_STATE_XRUN:
2251 case SNDRV_PCM_STATE_SUSPENDED:
2259 hw_avail = snd_pcm_playback_hw_avail(runtime);
2260 if (hw_avail <= 0) {
2264 if (frames > (snd_pcm_uframes_t)hw_avail)
2266 appl_ptr = runtime->control->appl_ptr - frames;
2268 appl_ptr += runtime->boundary;
2269 runtime->control->appl_ptr = appl_ptr;
2272 snd_pcm_stream_unlock_irq(substream);
2276 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2277 snd_pcm_uframes_t frames)
2279 struct snd_pcm_runtime *runtime = substream->runtime;
2280 snd_pcm_sframes_t appl_ptr;
2281 snd_pcm_sframes_t ret;
2282 snd_pcm_sframes_t hw_avail;
2287 snd_pcm_stream_lock_irq(substream);
2288 switch (runtime->status->state) {
2289 case SNDRV_PCM_STATE_PREPARED:
2290 case SNDRV_PCM_STATE_DRAINING:
2292 case SNDRV_PCM_STATE_RUNNING:
2293 if (snd_pcm_update_hw_ptr(substream) >= 0)
2296 case SNDRV_PCM_STATE_XRUN:
2299 case SNDRV_PCM_STATE_SUSPENDED:
2307 hw_avail = snd_pcm_capture_hw_avail(runtime);
2308 if (hw_avail <= 0) {
2312 if (frames > (snd_pcm_uframes_t)hw_avail)
2314 appl_ptr = runtime->control->appl_ptr - frames;
2316 appl_ptr += runtime->boundary;
2317 runtime->control->appl_ptr = appl_ptr;
2320 snd_pcm_stream_unlock_irq(substream);
2324 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2325 snd_pcm_uframes_t frames)
2327 struct snd_pcm_runtime *runtime = substream->runtime;
2328 snd_pcm_sframes_t appl_ptr;
2329 snd_pcm_sframes_t ret;
2330 snd_pcm_sframes_t avail;
2335 snd_pcm_stream_lock_irq(substream);
2336 switch (runtime->status->state) {
2337 case SNDRV_PCM_STATE_PREPARED:
2338 case SNDRV_PCM_STATE_PAUSED:
2340 case SNDRV_PCM_STATE_DRAINING:
2341 case SNDRV_PCM_STATE_RUNNING:
2342 if (snd_pcm_update_hw_ptr(substream) >= 0)
2345 case SNDRV_PCM_STATE_XRUN:
2348 case SNDRV_PCM_STATE_SUSPENDED:
2356 avail = snd_pcm_playback_avail(runtime);
2361 if (frames > (snd_pcm_uframes_t)avail)
2363 appl_ptr = runtime->control->appl_ptr + frames;
2364 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2365 appl_ptr -= runtime->boundary;
2366 runtime->control->appl_ptr = appl_ptr;
2369 snd_pcm_stream_unlock_irq(substream);
2373 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2374 snd_pcm_uframes_t frames)
2376 struct snd_pcm_runtime *runtime = substream->runtime;
2377 snd_pcm_sframes_t appl_ptr;
2378 snd_pcm_sframes_t ret;
2379 snd_pcm_sframes_t avail;
2384 snd_pcm_stream_lock_irq(substream);
2385 switch (runtime->status->state) {
2386 case SNDRV_PCM_STATE_PREPARED:
2387 case SNDRV_PCM_STATE_DRAINING:
2388 case SNDRV_PCM_STATE_PAUSED:
2390 case SNDRV_PCM_STATE_RUNNING:
2391 if (snd_pcm_update_hw_ptr(substream) >= 0)
2394 case SNDRV_PCM_STATE_XRUN:
2397 case SNDRV_PCM_STATE_SUSPENDED:
2405 avail = snd_pcm_capture_avail(runtime);
2410 if (frames > (snd_pcm_uframes_t)avail)
2412 appl_ptr = runtime->control->appl_ptr + frames;
2413 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2414 appl_ptr -= runtime->boundary;
2415 runtime->control->appl_ptr = appl_ptr;
2418 snd_pcm_stream_unlock_irq(substream);
2422 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2424 struct snd_pcm_runtime *runtime = substream->runtime;
2427 snd_pcm_stream_lock_irq(substream);
2428 switch (runtime->status->state) {
2429 case SNDRV_PCM_STATE_DRAINING:
2430 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2433 case SNDRV_PCM_STATE_RUNNING:
2434 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2437 case SNDRV_PCM_STATE_PREPARED:
2438 case SNDRV_PCM_STATE_SUSPENDED:
2441 case SNDRV_PCM_STATE_XRUN:
2449 snd_pcm_stream_unlock_irq(substream);
2453 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2454 snd_pcm_sframes_t __user *res)
2456 struct snd_pcm_runtime *runtime = substream->runtime;
2458 snd_pcm_sframes_t n = 0;
2460 snd_pcm_stream_lock_irq(substream);
2461 switch (runtime->status->state) {
2462 case SNDRV_PCM_STATE_DRAINING:
2463 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2466 case SNDRV_PCM_STATE_RUNNING:
2467 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2470 case SNDRV_PCM_STATE_PREPARED:
2471 case SNDRV_PCM_STATE_SUSPENDED:
2473 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2474 n = snd_pcm_playback_hw_avail(runtime);
2476 n = snd_pcm_capture_avail(runtime);
2477 n += runtime->delay;
2479 case SNDRV_PCM_STATE_XRUN:
2487 snd_pcm_stream_unlock_irq(substream);
2489 if (put_user(n, res))
2494 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2495 struct snd_pcm_sync_ptr __user *_sync_ptr)
2497 struct snd_pcm_runtime *runtime = substream->runtime;
2498 struct snd_pcm_sync_ptr sync_ptr;
2499 volatile struct snd_pcm_mmap_status *status;
2500 volatile struct snd_pcm_mmap_control *control;
2503 memset(&sync_ptr, 0, sizeof(sync_ptr));
2504 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2506 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2508 status = runtime->status;
2509 control = runtime->control;
2510 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2511 err = snd_pcm_hwsync(substream);
2515 snd_pcm_stream_lock_irq(substream);
2516 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2517 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2519 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2520 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2521 control->avail_min = sync_ptr.c.control.avail_min;
2523 sync_ptr.c.control.avail_min = control->avail_min;
2524 sync_ptr.s.status.state = status->state;
2525 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2526 sync_ptr.s.status.tstamp = status->tstamp;
2527 sync_ptr.s.status.suspended_state = status->suspended_state;
2528 snd_pcm_stream_unlock_irq(substream);
2529 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2534 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2536 struct snd_pcm_runtime *runtime = substream->runtime;
2539 if (get_user(arg, _arg))
2541 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2543 runtime->tstamp_type = arg;
2547 static int snd_pcm_common_ioctl1(struct file *file,
2548 struct snd_pcm_substream *substream,
2549 unsigned int cmd, void __user *arg)
2552 case SNDRV_PCM_IOCTL_PVERSION:
2553 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2554 case SNDRV_PCM_IOCTL_INFO:
2555 return snd_pcm_info_user(substream, arg);
2556 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2558 case SNDRV_PCM_IOCTL_TTSTAMP:
2559 return snd_pcm_tstamp(substream, arg);
2560 case SNDRV_PCM_IOCTL_HW_REFINE:
2561 return snd_pcm_hw_refine_user(substream, arg);
2562 case SNDRV_PCM_IOCTL_HW_PARAMS:
2563 return snd_pcm_hw_params_user(substream, arg);
2564 case SNDRV_PCM_IOCTL_HW_FREE:
2565 return snd_pcm_hw_free(substream);
2566 case SNDRV_PCM_IOCTL_SW_PARAMS:
2567 return snd_pcm_sw_params_user(substream, arg);
2568 case SNDRV_PCM_IOCTL_STATUS:
2569 return snd_pcm_status_user(substream, arg);
2570 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2571 return snd_pcm_channel_info_user(substream, arg);
2572 case SNDRV_PCM_IOCTL_PREPARE:
2573 return snd_pcm_prepare(substream, file);
2574 case SNDRV_PCM_IOCTL_RESET:
2575 return snd_pcm_reset(substream);
2576 case SNDRV_PCM_IOCTL_START:
2577 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2578 case SNDRV_PCM_IOCTL_LINK:
2579 return snd_pcm_link(substream, (int)(unsigned long) arg);
2580 case SNDRV_PCM_IOCTL_UNLINK:
2581 return snd_pcm_unlink(substream);
2582 case SNDRV_PCM_IOCTL_RESUME:
2583 return snd_pcm_resume(substream);
2584 case SNDRV_PCM_IOCTL_XRUN:
2585 return snd_pcm_xrun(substream);
2586 case SNDRV_PCM_IOCTL_HWSYNC:
2587 return snd_pcm_hwsync(substream);
2588 case SNDRV_PCM_IOCTL_DELAY:
2589 return snd_pcm_delay(substream, arg);
2590 case SNDRV_PCM_IOCTL_SYNC_PTR:
2591 return snd_pcm_sync_ptr(substream, arg);
2592 #ifdef CONFIG_SND_SUPPORT_OLD_API
2593 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2594 return snd_pcm_hw_refine_old_user(substream, arg);
2595 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2596 return snd_pcm_hw_params_old_user(substream, arg);
2598 case SNDRV_PCM_IOCTL_DRAIN:
2599 return snd_pcm_drain(substream, file);
2600 case SNDRV_PCM_IOCTL_DROP:
2601 return snd_pcm_drop(substream);
2602 case SNDRV_PCM_IOCTL_PAUSE:
2605 snd_pcm_stream_lock_irq(substream);
2606 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2607 snd_pcm_stream_unlock_irq(substream);
2611 pcm_dbg(substream->pcm, "unknown ioctl = 0x%x\n", cmd);
2615 static int snd_pcm_playback_ioctl1(struct file *file,
2616 struct snd_pcm_substream *substream,
2617 unsigned int cmd, void __user *arg)
2619 if (snd_BUG_ON(!substream))
2621 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2624 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2626 struct snd_xferi xferi;
2627 struct snd_xferi __user *_xferi = arg;
2628 struct snd_pcm_runtime *runtime = substream->runtime;
2629 snd_pcm_sframes_t result;
2630 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2632 if (put_user(0, &_xferi->result))
2634 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2636 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2637 __put_user(result, &_xferi->result);
2638 return result < 0 ? result : 0;
2640 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2642 struct snd_xfern xfern;
2643 struct snd_xfern __user *_xfern = arg;
2644 struct snd_pcm_runtime *runtime = substream->runtime;
2646 snd_pcm_sframes_t result;
2647 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2649 if (runtime->channels > 128)
2651 if (put_user(0, &_xfern->result))
2653 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2656 bufs = memdup_user(xfern.bufs,
2657 sizeof(void *) * runtime->channels);
2659 return PTR_ERR(bufs);
2660 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2662 __put_user(result, &_xfern->result);
2663 return result < 0 ? result : 0;
2665 case SNDRV_PCM_IOCTL_REWIND:
2667 snd_pcm_uframes_t frames;
2668 snd_pcm_uframes_t __user *_frames = arg;
2669 snd_pcm_sframes_t result;
2670 if (get_user(frames, _frames))
2672 if (put_user(0, _frames))
2674 result = snd_pcm_playback_rewind(substream, frames);
2675 __put_user(result, _frames);
2676 return result < 0 ? result : 0;
2678 case SNDRV_PCM_IOCTL_FORWARD:
2680 snd_pcm_uframes_t frames;
2681 snd_pcm_uframes_t __user *_frames = arg;
2682 snd_pcm_sframes_t result;
2683 if (get_user(frames, _frames))
2685 if (put_user(0, _frames))
2687 result = snd_pcm_playback_forward(substream, frames);
2688 __put_user(result, _frames);
2689 return result < 0 ? result : 0;
2692 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2695 static int snd_pcm_capture_ioctl1(struct file *file,
2696 struct snd_pcm_substream *substream,
2697 unsigned int cmd, void __user *arg)
2699 if (snd_BUG_ON(!substream))
2701 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2704 case SNDRV_PCM_IOCTL_READI_FRAMES:
2706 struct snd_xferi xferi;
2707 struct snd_xferi __user *_xferi = arg;
2708 struct snd_pcm_runtime *runtime = substream->runtime;
2709 snd_pcm_sframes_t result;
2710 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2712 if (put_user(0, &_xferi->result))
2714 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2716 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2717 __put_user(result, &_xferi->result);
2718 return result < 0 ? result : 0;
2720 case SNDRV_PCM_IOCTL_READN_FRAMES:
2722 struct snd_xfern xfern;
2723 struct snd_xfern __user *_xfern = arg;
2724 struct snd_pcm_runtime *runtime = substream->runtime;
2726 snd_pcm_sframes_t result;
2727 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2729 if (runtime->channels > 128)
2731 if (put_user(0, &_xfern->result))
2733 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2736 bufs = memdup_user(xfern.bufs,
2737 sizeof(void *) * runtime->channels);
2739 return PTR_ERR(bufs);
2740 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2742 __put_user(result, &_xfern->result);
2743 return result < 0 ? result : 0;
2745 case SNDRV_PCM_IOCTL_REWIND:
2747 snd_pcm_uframes_t frames;
2748 snd_pcm_uframes_t __user *_frames = arg;
2749 snd_pcm_sframes_t result;
2750 if (get_user(frames, _frames))
2752 if (put_user(0, _frames))
2754 result = snd_pcm_capture_rewind(substream, frames);
2755 __put_user(result, _frames);
2756 return result < 0 ? result : 0;
2758 case SNDRV_PCM_IOCTL_FORWARD:
2760 snd_pcm_uframes_t frames;
2761 snd_pcm_uframes_t __user *_frames = arg;
2762 snd_pcm_sframes_t result;
2763 if (get_user(frames, _frames))
2765 if (put_user(0, _frames))
2767 result = snd_pcm_capture_forward(substream, frames);
2768 __put_user(result, _frames);
2769 return result < 0 ? result : 0;
2772 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2775 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2778 struct snd_pcm_file *pcm_file;
2780 pcm_file = file->private_data;
2782 if (((cmd >> 8) & 0xff) != 'A')
2785 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2786 (void __user *)arg);
2789 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2792 struct snd_pcm_file *pcm_file;
2794 pcm_file = file->private_data;
2796 if (((cmd >> 8) & 0xff) != 'A')
2799 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2800 (void __user *)arg);
2803 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2804 unsigned int cmd, void *arg)
2809 fs = snd_enter_user();
2810 switch (substream->stream) {
2811 case SNDRV_PCM_STREAM_PLAYBACK:
2812 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2813 (void __user *)arg);
2815 case SNDRV_PCM_STREAM_CAPTURE:
2816 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2817 (void __user *)arg);
2827 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2829 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2832 struct snd_pcm_file *pcm_file;
2833 struct snd_pcm_substream *substream;
2834 struct snd_pcm_runtime *runtime;
2835 snd_pcm_sframes_t result;
2837 pcm_file = file->private_data;
2838 substream = pcm_file->substream;
2839 if (PCM_RUNTIME_CHECK(substream))
2841 runtime = substream->runtime;
2842 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2844 if (!frame_aligned(runtime, count))
2846 count = bytes_to_frames(runtime, count);
2847 result = snd_pcm_lib_read(substream, buf, count);
2849 result = frames_to_bytes(runtime, result);
2853 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2854 size_t count, loff_t * offset)
2856 struct snd_pcm_file *pcm_file;
2857 struct snd_pcm_substream *substream;
2858 struct snd_pcm_runtime *runtime;
2859 snd_pcm_sframes_t result;
2861 pcm_file = file->private_data;
2862 substream = pcm_file->substream;
2863 if (PCM_RUNTIME_CHECK(substream))
2865 runtime = substream->runtime;
2866 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2868 if (!frame_aligned(runtime, count))
2870 count = bytes_to_frames(runtime, count);
2871 result = snd_pcm_lib_write(substream, buf, count);
2873 result = frames_to_bytes(runtime, result);
2877 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2878 unsigned long nr_segs, loff_t pos)
2881 struct snd_pcm_file *pcm_file;
2882 struct snd_pcm_substream *substream;
2883 struct snd_pcm_runtime *runtime;
2884 snd_pcm_sframes_t result;
2887 snd_pcm_uframes_t frames;
2889 pcm_file = iocb->ki_filp->private_data;
2890 substream = pcm_file->substream;
2891 if (PCM_RUNTIME_CHECK(substream))
2893 runtime = substream->runtime;
2894 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2896 if (nr_segs > 1024 || nr_segs != runtime->channels)
2898 if (!frame_aligned(runtime, iov->iov_len))
2900 frames = bytes_to_samples(runtime, iov->iov_len);
2901 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2904 for (i = 0; i < nr_segs; ++i)
2905 bufs[i] = iov[i].iov_base;
2906 result = snd_pcm_lib_readv(substream, bufs, frames);
2908 result = frames_to_bytes(runtime, result);
2913 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2914 unsigned long nr_segs, loff_t pos)
2916 struct snd_pcm_file *pcm_file;
2917 struct snd_pcm_substream *substream;
2918 struct snd_pcm_runtime *runtime;
2919 snd_pcm_sframes_t result;
2922 snd_pcm_uframes_t frames;
2924 pcm_file = iocb->ki_filp->private_data;
2925 substream = pcm_file->substream;
2926 if (PCM_RUNTIME_CHECK(substream))
2928 runtime = substream->runtime;
2929 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2931 if (nr_segs > 128 || nr_segs != runtime->channels ||
2932 !frame_aligned(runtime, iov->iov_len))
2934 frames = bytes_to_samples(runtime, iov->iov_len);
2935 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2938 for (i = 0; i < nr_segs; ++i)
2939 bufs[i] = iov[i].iov_base;
2940 result = snd_pcm_lib_writev(substream, bufs, frames);
2942 result = frames_to_bytes(runtime, result);
2947 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2949 struct snd_pcm_file *pcm_file;
2950 struct snd_pcm_substream *substream;
2951 struct snd_pcm_runtime *runtime;
2953 snd_pcm_uframes_t avail;
2955 pcm_file = file->private_data;
2957 substream = pcm_file->substream;
2958 if (PCM_RUNTIME_CHECK(substream))
2960 runtime = substream->runtime;
2962 poll_wait(file, &runtime->sleep, wait);
2964 snd_pcm_stream_lock_irq(substream);
2965 avail = snd_pcm_playback_avail(runtime);
2966 switch (runtime->status->state) {
2967 case SNDRV_PCM_STATE_RUNNING:
2968 case SNDRV_PCM_STATE_PREPARED:
2969 case SNDRV_PCM_STATE_PAUSED:
2970 if (avail >= runtime->control->avail_min) {
2971 mask = POLLOUT | POLLWRNORM;
2975 case SNDRV_PCM_STATE_DRAINING:
2979 mask = POLLOUT | POLLWRNORM | POLLERR;
2982 snd_pcm_stream_unlock_irq(substream);
2986 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2988 struct snd_pcm_file *pcm_file;
2989 struct snd_pcm_substream *substream;
2990 struct snd_pcm_runtime *runtime;
2992 snd_pcm_uframes_t avail;
2994 pcm_file = file->private_data;
2996 substream = pcm_file->substream;
2997 if (PCM_RUNTIME_CHECK(substream))
2999 runtime = substream->runtime;
3001 poll_wait(file, &runtime->sleep, wait);
3003 snd_pcm_stream_lock_irq(substream);
3004 avail = snd_pcm_capture_avail(runtime);
3005 switch (runtime->status->state) {
3006 case SNDRV_PCM_STATE_RUNNING:
3007 case SNDRV_PCM_STATE_PREPARED:
3008 case SNDRV_PCM_STATE_PAUSED:
3009 if (avail >= runtime->control->avail_min) {
3010 mask = POLLIN | POLLRDNORM;
3015 case SNDRV_PCM_STATE_DRAINING:
3017 mask = POLLIN | POLLRDNORM;
3022 mask = POLLIN | POLLRDNORM | POLLERR;
3025 snd_pcm_stream_unlock_irq(substream);
3034 * Only on coherent architectures, we can mmap the status and the control records
3035 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3037 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3039 * mmap status record
3041 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3042 struct vm_fault *vmf)
3044 struct snd_pcm_substream *substream = area->vm_private_data;
3045 struct snd_pcm_runtime *runtime;
3047 if (substream == NULL)
3048 return VM_FAULT_SIGBUS;
3049 runtime = substream->runtime;
3050 vmf->page = virt_to_page(runtime->status);
3051 get_page(vmf->page);
3055 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3057 .fault = snd_pcm_mmap_status_fault,
3060 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3061 struct vm_area_struct *area)
3064 if (!(area->vm_flags & VM_READ))
3066 size = area->vm_end - area->vm_start;
3067 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3069 area->vm_ops = &snd_pcm_vm_ops_status;
3070 area->vm_private_data = substream;
3071 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3076 * mmap control record
3078 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3079 struct vm_fault *vmf)
3081 struct snd_pcm_substream *substream = area->vm_private_data;
3082 struct snd_pcm_runtime *runtime;
3084 if (substream == NULL)
3085 return VM_FAULT_SIGBUS;
3086 runtime = substream->runtime;
3087 vmf->page = virt_to_page(runtime->control);
3088 get_page(vmf->page);
3092 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3094 .fault = snd_pcm_mmap_control_fault,
3097 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3098 struct vm_area_struct *area)
3101 if (!(area->vm_flags & VM_READ))
3103 size = area->vm_end - area->vm_start;
3104 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3106 area->vm_ops = &snd_pcm_vm_ops_control;
3107 area->vm_private_data = substream;
3108 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3111 #else /* ! coherent mmap */
3113 * don't support mmap for status and control records.
3115 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3116 struct vm_area_struct *area)
3120 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3121 struct vm_area_struct *area)
3125 #endif /* coherent mmap */
3127 static inline struct page *
3128 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3130 void *vaddr = substream->runtime->dma_area + ofs;
3131 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3132 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3133 return virt_to_page(CAC_ADDR(vaddr));
3135 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3136 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3137 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3138 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3139 /* assume dma_handle set via pfn_to_phys() in
3140 * mm/dma-noncoherent.c
3142 return pfn_to_page(addr >> PAGE_SHIFT);
3145 return virt_to_page(vaddr);
3149 * fault callback for mmapping a RAM page
3151 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3152 struct vm_fault *vmf)
3154 struct snd_pcm_substream *substream = area->vm_private_data;
3155 struct snd_pcm_runtime *runtime;
3156 unsigned long offset;
3160 if (substream == NULL)
3161 return VM_FAULT_SIGBUS;
3162 runtime = substream->runtime;
3163 offset = vmf->pgoff << PAGE_SHIFT;
3164 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3165 if (offset > dma_bytes - PAGE_SIZE)
3166 return VM_FAULT_SIGBUS;
3167 if (substream->ops->page)
3168 page = substream->ops->page(substream, offset);
3170 page = snd_pcm_default_page_ops(substream, offset);
3172 return VM_FAULT_SIGBUS;
3178 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3179 .open = snd_pcm_mmap_data_open,
3180 .close = snd_pcm_mmap_data_close,
3183 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3184 .open = snd_pcm_mmap_data_open,
3185 .close = snd_pcm_mmap_data_close,
3186 .fault = snd_pcm_mmap_data_fault,
3189 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3190 /* This should be defined / handled globally! */
3192 #define ARCH_HAS_DMA_MMAP_COHERENT
3197 * mmap the DMA buffer on RAM
3199 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3200 struct vm_area_struct *area)
3202 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3203 #ifdef CONFIG_GENERIC_ALLOCATOR
3204 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_IRAM) {
3205 area->vm_page_prot = pgprot_writecombine(area->vm_page_prot);
3206 return remap_pfn_range(area, area->vm_start,
3207 substream->dma_buffer.addr >> PAGE_SHIFT,
3208 area->vm_end - area->vm_start, area->vm_page_prot);
3210 #endif /* CONFIG_GENERIC_ALLOCATOR */
3211 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3212 if (!substream->ops->page &&
3213 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3214 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3216 substream->runtime->dma_area,
3217 substream->runtime->dma_addr,
3218 area->vm_end - area->vm_start);
3219 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3220 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3221 !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3222 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3223 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3224 /* mmap with fault handler */
3225 area->vm_ops = &snd_pcm_vm_ops_data_fault;
3228 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3231 * mmap the DMA buffer on I/O memory area
3233 #if SNDRV_PCM_INFO_MMAP_IOMEM
3234 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3235 struct vm_area_struct *area)
3237 struct snd_pcm_runtime *runtime = substream->runtime;;
3239 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3240 return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);
3243 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3244 #endif /* SNDRV_PCM_INFO_MMAP */
3249 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3250 struct vm_area_struct *area)
3252 struct snd_pcm_runtime *runtime;
3254 unsigned long offset;
3258 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3259 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3262 if (!(area->vm_flags & VM_READ))
3265 runtime = substream->runtime;
3266 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3268 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3270 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3271 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3273 size = area->vm_end - area->vm_start;
3274 offset = area->vm_pgoff << PAGE_SHIFT;
3275 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3276 if ((size_t)size > dma_bytes)
3278 if (offset > dma_bytes - size)
3281 area->vm_ops = &snd_pcm_vm_ops_data;
3282 area->vm_private_data = substream;
3283 if (substream->ops->mmap)
3284 err = substream->ops->mmap(substream, area);
3286 err = snd_pcm_lib_default_mmap(substream, area);
3288 atomic_inc(&substream->mmap_count);
3292 EXPORT_SYMBOL(snd_pcm_mmap_data);
3294 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3296 struct snd_pcm_file * pcm_file;
3297 struct snd_pcm_substream *substream;
3298 unsigned long offset;
3300 pcm_file = file->private_data;
3301 substream = pcm_file->substream;
3302 if (PCM_RUNTIME_CHECK(substream))
3305 offset = area->vm_pgoff << PAGE_SHIFT;
3307 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3308 if (pcm_file->no_compat_mmap)
3310 return snd_pcm_mmap_status(substream, file, area);
3311 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3312 if (pcm_file->no_compat_mmap)
3314 return snd_pcm_mmap_control(substream, file, area);
3316 return snd_pcm_mmap_data(substream, file, area);
3321 static int snd_pcm_fasync(int fd, struct file * file, int on)
3323 struct snd_pcm_file * pcm_file;
3324 struct snd_pcm_substream *substream;
3325 struct snd_pcm_runtime *runtime;
3327 pcm_file = file->private_data;
3328 substream = pcm_file->substream;
3329 if (PCM_RUNTIME_CHECK(substream))
3331 runtime = substream->runtime;
3332 return fasync_helper(fd, file, on, &runtime->fasync);
3338 #ifdef CONFIG_COMPAT
3339 #include "pcm_compat.c"
3341 #define snd_pcm_ioctl_compat NULL
3345 * To be removed helpers to keep binary compatibility
3348 #ifdef CONFIG_SND_SUPPORT_OLD_API
3349 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3350 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3352 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3353 struct snd_pcm_hw_params_old *oparams)
3357 memset(params, 0, sizeof(*params));
3358 params->flags = oparams->flags;
3359 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3360 params->masks[i].bits[0] = oparams->masks[i];
3361 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3362 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3363 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3364 params->info = oparams->info;
3365 params->msbits = oparams->msbits;
3366 params->rate_num = oparams->rate_num;
3367 params->rate_den = oparams->rate_den;
3368 params->fifo_size = oparams->fifo_size;
3371 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3372 struct snd_pcm_hw_params *params)
3376 memset(oparams, 0, sizeof(*oparams));
3377 oparams->flags = params->flags;
3378 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3379 oparams->masks[i] = params->masks[i].bits[0];
3380 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3381 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3382 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3383 oparams->info = params->info;
3384 oparams->msbits = params->msbits;
3385 oparams->rate_num = params->rate_num;
3386 oparams->rate_den = params->rate_den;
3387 oparams->fifo_size = params->fifo_size;
3390 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3391 struct snd_pcm_hw_params_old __user * _oparams)
3393 struct snd_pcm_hw_params *params;
3394 struct snd_pcm_hw_params_old *oparams = NULL;
3397 params = kmalloc(sizeof(*params), GFP_KERNEL);
3401 oparams = memdup_user(_oparams, sizeof(*oparams));
3402 if (IS_ERR(oparams)) {
3403 err = PTR_ERR(oparams);
3406 snd_pcm_hw_convert_from_old_params(params, oparams);
3407 err = snd_pcm_hw_refine(substream, params);
3408 snd_pcm_hw_convert_to_old_params(oparams, params);
3409 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3420 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3421 struct snd_pcm_hw_params_old __user * _oparams)
3423 struct snd_pcm_hw_params *params;
3424 struct snd_pcm_hw_params_old *oparams = NULL;
3427 params = kmalloc(sizeof(*params), GFP_KERNEL);
3431 oparams = memdup_user(_oparams, sizeof(*oparams));
3432 if (IS_ERR(oparams)) {
3433 err = PTR_ERR(oparams);
3436 snd_pcm_hw_convert_from_old_params(params, oparams);
3437 err = snd_pcm_hw_params(substream, params);
3438 snd_pcm_hw_convert_to_old_params(oparams, params);
3439 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3449 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3452 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3455 unsigned long pgoff,
3456 unsigned long flags)
3458 struct snd_pcm_file *pcm_file = file->private_data;
3459 struct snd_pcm_substream *substream = pcm_file->substream;
3460 struct snd_pcm_runtime *runtime = substream->runtime;
3461 unsigned long offset = pgoff << PAGE_SHIFT;
3464 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3465 return (unsigned long)runtime->status;
3466 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3467 return (unsigned long)runtime->control;
3469 return (unsigned long)runtime->dma_area + offset;
3473 # define snd_pcm_get_unmapped_area NULL
3480 const struct file_operations snd_pcm_f_ops[2] = {
3482 .owner = THIS_MODULE,
3483 .write = snd_pcm_write,
3484 .aio_write = snd_pcm_aio_write,
3485 .open = snd_pcm_playback_open,
3486 .release = snd_pcm_release,
3487 .llseek = no_llseek,
3488 .poll = snd_pcm_playback_poll,
3489 .unlocked_ioctl = snd_pcm_playback_ioctl,
3490 .compat_ioctl = snd_pcm_ioctl_compat,
3491 .mmap = snd_pcm_mmap,
3492 .fasync = snd_pcm_fasync,
3493 .get_unmapped_area = snd_pcm_get_unmapped_area,
3496 .owner = THIS_MODULE,
3497 .read = snd_pcm_read,
3498 .aio_read = snd_pcm_aio_read,
3499 .open = snd_pcm_capture_open,
3500 .release = snd_pcm_release,
3501 .llseek = no_llseek,
3502 .poll = snd_pcm_capture_poll,
3503 .unlocked_ioctl = snd_pcm_capture_ioctl,
3504 .compat_ioctl = snd_pcm_ioctl_compat,
3505 .mmap = snd_pcm_mmap,
3506 .fasync = snd_pcm_fasync,
3507 .get_unmapped_area = snd_pcm_get_unmapped_area,