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
22 #include <sound/driver.h>
24 #include <linux/file.h>
25 #include <linux/slab.h>
26 #include <linux/time.h>
27 #include <linux/latency.h>
28 #include <linux/uio.h>
29 #include <sound/core.h>
30 #include <sound/control.h>
31 #include <sound/info.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/timer.h>
35 #include <sound/minors.h>
42 struct snd_pcm_hw_params_old {
44 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
45 SNDRV_PCM_HW_PARAM_ACCESS + 1];
46 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
47 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
52 unsigned int rate_num;
53 unsigned int rate_den;
54 snd_pcm_uframes_t fifo_size;
55 unsigned char reserved[64];
58 #ifdef CONFIG_SND_SUPPORT_OLD_API
59 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
60 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
62 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
63 struct snd_pcm_hw_params_old __user * _oparams);
64 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
65 struct snd_pcm_hw_params_old __user * _oparams);
67 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
73 DEFINE_RWLOCK(snd_pcm_link_rwlock);
74 EXPORT_SYMBOL(snd_pcm_link_rwlock);
76 static DECLARE_RWSEM(snd_pcm_link_rwsem);
78 static inline mm_segment_t snd_enter_user(void)
80 mm_segment_t fs = get_fs();
85 static inline void snd_leave_user(mm_segment_t fs)
92 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
94 struct snd_pcm_runtime *runtime;
95 struct snd_pcm *pcm = substream->pcm;
96 struct snd_pcm_str *pstr = substream->pstr;
98 snd_assert(substream != NULL, return -ENXIO);
99 memset(info, 0, sizeof(*info));
100 info->card = pcm->card->number;
101 info->device = pcm->device;
102 info->stream = substream->stream;
103 info->subdevice = substream->number;
104 strlcpy(info->id, pcm->id, sizeof(info->id));
105 strlcpy(info->name, pcm->name, sizeof(info->name));
106 info->dev_class = pcm->dev_class;
107 info->dev_subclass = pcm->dev_subclass;
108 info->subdevices_count = pstr->substream_count;
109 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
110 strlcpy(info->subname, substream->name, sizeof(info->subname));
111 runtime = substream->runtime;
112 /* AB: FIXME!!! This is definitely nonsense */
114 info->sync = runtime->sync;
115 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
120 int snd_pcm_info_user(struct snd_pcm_substream *substream,
121 struct snd_pcm_info __user * _info)
123 struct snd_pcm_info *info;
126 info = kmalloc(sizeof(*info), GFP_KERNEL);
129 err = snd_pcm_info(substream, info);
131 if (copy_to_user(_info, info, sizeof(*info)))
141 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
142 char *snd_pcm_hw_param_names[] = {
146 HW_PARAM(SAMPLE_BITS),
147 HW_PARAM(FRAME_BITS),
150 HW_PARAM(PERIOD_TIME),
151 HW_PARAM(PERIOD_SIZE),
152 HW_PARAM(PERIOD_BYTES),
154 HW_PARAM(BUFFER_TIME),
155 HW_PARAM(BUFFER_SIZE),
156 HW_PARAM(BUFFER_BYTES),
161 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
162 struct snd_pcm_hw_params *params)
165 struct snd_pcm_hardware *hw;
166 struct snd_interval *i = NULL;
167 struct snd_mask *m = NULL;
168 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
169 unsigned int rstamps[constrs->rules_num];
170 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
171 unsigned int stamp = 2;
175 params->fifo_size = 0;
176 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
178 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
179 params->rate_num = 0;
180 params->rate_den = 0;
183 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
184 m = hw_param_mask(params, k);
185 if (snd_mask_empty(m))
187 if (!(params->rmask & (1 << k)))
190 printk("%s = ", snd_pcm_hw_param_names[k]);
191 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
193 changed = snd_mask_refine(m, constrs_mask(constrs, k));
195 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
198 params->cmask |= 1 << k;
203 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
204 i = hw_param_interval(params, k);
205 if (snd_interval_empty(i))
207 if (!(params->rmask & (1 << k)))
210 printk("%s = ", snd_pcm_hw_param_names[k]);
215 i->openmin ? '(' : '[', i->min,
216 i->max, i->openmax ? ')' : ']');
219 changed = snd_interval_refine(i, constrs_interval(constrs, k));
224 printk("%c%u %u%c\n",
225 i->openmin ? '(' : '[', i->min,
226 i->max, i->openmax ? ')' : ']');
229 params->cmask |= 1 << k;
234 for (k = 0; k < constrs->rules_num; k++)
236 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
237 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
240 for (k = 0; k < constrs->rules_num; k++) {
241 struct snd_pcm_hw_rule *r = &constrs->rules[k];
244 if (r->cond && !(r->cond & params->flags))
246 for (d = 0; r->deps[d] >= 0; d++) {
247 if (vstamps[r->deps[d]] > rstamps[k]) {
255 printk("Rule %d [%p]: ", k, r->func);
257 printk("%s = ", snd_pcm_hw_param_names[r->var]);
258 if (hw_is_mask(r->var)) {
259 m = hw_param_mask(params, r->var);
260 printk("%x", *m->bits);
262 i = hw_param_interval(params, r->var);
267 i->openmin ? '(' : '[', i->min,
268 i->max, i->openmax ? ')' : ']');
272 changed = r->func(params, r);
276 if (hw_is_mask(r->var))
277 printk("%x", *m->bits);
283 i->openmin ? '(' : '[', i->min,
284 i->max, i->openmax ? ')' : ']');
290 if (changed && r->var >= 0) {
291 params->cmask |= (1 << r->var);
292 vstamps[r->var] = stamp;
300 if (!params->msbits) {
301 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
302 if (snd_interval_single(i))
303 params->msbits = snd_interval_value(i);
306 if (!params->rate_den) {
307 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
308 if (snd_interval_single(i)) {
309 params->rate_num = snd_interval_value(i);
310 params->rate_den = 1;
314 hw = &substream->runtime->hw;
316 params->info = hw->info;
317 if (!params->fifo_size)
318 params->fifo_size = hw->fifo_size;
323 EXPORT_SYMBOL(snd_pcm_hw_refine);
325 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
326 struct snd_pcm_hw_params __user * _params)
328 struct snd_pcm_hw_params *params;
331 params = kmalloc(sizeof(*params), GFP_KERNEL);
336 if (copy_from_user(params, _params, sizeof(*params))) {
340 err = snd_pcm_hw_refine(substream, params);
341 if (copy_to_user(_params, params, sizeof(*params))) {
350 static int period_to_usecs(struct snd_pcm_runtime *runtime)
355 return -1; /* invalid */
357 /* take 75% of period time as the deadline */
358 usecs = (750000 / runtime->rate) * runtime->period_size;
359 usecs += ((750000 % runtime->rate) * runtime->period_size) /
365 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
366 struct snd_pcm_hw_params *params)
368 struct snd_pcm_runtime *runtime;
371 snd_pcm_uframes_t frames;
373 snd_assert(substream != NULL, return -ENXIO);
374 runtime = substream->runtime;
375 snd_assert(runtime != NULL, return -ENXIO);
376 snd_pcm_stream_lock_irq(substream);
377 switch (runtime->status->state) {
378 case SNDRV_PCM_STATE_OPEN:
379 case SNDRV_PCM_STATE_SETUP:
380 case SNDRV_PCM_STATE_PREPARED:
383 snd_pcm_stream_unlock_irq(substream);
386 snd_pcm_stream_unlock_irq(substream);
387 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
388 if (!substream->oss.oss)
390 if (atomic_read(&substream->mmap_count))
394 err = snd_pcm_hw_refine(substream, params);
398 err = snd_pcm_hw_params_choose(substream, params);
402 if (substream->ops->hw_params != NULL) {
403 err = substream->ops->hw_params(substream, params);
408 runtime->access = params_access(params);
409 runtime->format = params_format(params);
410 runtime->subformat = params_subformat(params);
411 runtime->channels = params_channels(params);
412 runtime->rate = params_rate(params);
413 runtime->period_size = params_period_size(params);
414 runtime->periods = params_periods(params);
415 runtime->buffer_size = params_buffer_size(params);
416 runtime->tick_time = params_tick_time(params);
417 runtime->info = params->info;
418 runtime->rate_num = params->rate_num;
419 runtime->rate_den = params->rate_den;
421 bits = snd_pcm_format_physical_width(runtime->format);
422 runtime->sample_bits = bits;
423 bits *= runtime->channels;
424 runtime->frame_bits = bits;
426 while (bits % 8 != 0) {
430 runtime->byte_align = bits / 8;
431 runtime->min_align = frames;
433 /* Default sw params */
434 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
435 runtime->period_step = 1;
436 runtime->sleep_min = 0;
437 runtime->control->avail_min = runtime->period_size;
438 runtime->start_threshold = 1;
439 runtime->stop_threshold = runtime->buffer_size;
440 runtime->silence_threshold = 0;
441 runtime->silence_size = 0;
442 runtime->boundary = runtime->buffer_size;
443 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
444 runtime->boundary *= 2;
446 snd_pcm_timer_resolution_change(substream);
447 runtime->status->state = SNDRV_PCM_STATE_SETUP;
449 remove_acceptable_latency(substream->latency_id);
450 if ((usecs = period_to_usecs(runtime)) >= 0)
451 set_acceptable_latency(substream->latency_id, usecs);
454 /* hardware might be unuseable from this time,
455 so we force application to retry to set
456 the correct hardware parameter settings */
457 runtime->status->state = SNDRV_PCM_STATE_OPEN;
458 if (substream->ops->hw_free != NULL)
459 substream->ops->hw_free(substream);
463 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
464 struct snd_pcm_hw_params __user * _params)
466 struct snd_pcm_hw_params *params;
469 params = kmalloc(sizeof(*params), GFP_KERNEL);
474 if (copy_from_user(params, _params, sizeof(*params))) {
478 err = snd_pcm_hw_params(substream, params);
479 if (copy_to_user(_params, params, sizeof(*params))) {
488 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
490 struct snd_pcm_runtime *runtime;
493 snd_assert(substream != NULL, return -ENXIO);
494 runtime = substream->runtime;
495 snd_assert(runtime != NULL, return -ENXIO);
496 snd_pcm_stream_lock_irq(substream);
497 switch (runtime->status->state) {
498 case SNDRV_PCM_STATE_SETUP:
499 case SNDRV_PCM_STATE_PREPARED:
502 snd_pcm_stream_unlock_irq(substream);
505 snd_pcm_stream_unlock_irq(substream);
506 if (atomic_read(&substream->mmap_count))
508 if (substream->ops->hw_free)
509 result = substream->ops->hw_free(substream);
510 runtime->status->state = SNDRV_PCM_STATE_OPEN;
511 remove_acceptable_latency(substream->latency_id);
515 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
516 struct snd_pcm_sw_params *params)
518 struct snd_pcm_runtime *runtime;
520 snd_assert(substream != NULL, return -ENXIO);
521 runtime = substream->runtime;
522 snd_assert(runtime != NULL, return -ENXIO);
523 snd_pcm_stream_lock_irq(substream);
524 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
525 snd_pcm_stream_unlock_irq(substream);
528 snd_pcm_stream_unlock_irq(substream);
530 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
532 if (params->avail_min == 0)
534 if (params->silence_size >= runtime->boundary) {
535 if (params->silence_threshold != 0)
538 if (params->silence_size > params->silence_threshold)
540 if (params->silence_threshold > runtime->buffer_size)
543 snd_pcm_stream_lock_irq(substream);
544 runtime->tstamp_mode = params->tstamp_mode;
545 runtime->sleep_min = params->sleep_min;
546 runtime->period_step = params->period_step;
547 runtime->control->avail_min = params->avail_min;
548 runtime->start_threshold = params->start_threshold;
549 runtime->stop_threshold = params->stop_threshold;
550 runtime->silence_threshold = params->silence_threshold;
551 runtime->silence_size = params->silence_size;
552 params->boundary = runtime->boundary;
553 if (snd_pcm_running(substream)) {
554 if (runtime->sleep_min)
555 snd_pcm_tick_prepare(substream);
557 snd_pcm_tick_set(substream, 0);
558 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
559 runtime->silence_size > 0)
560 snd_pcm_playback_silence(substream, ULONG_MAX);
561 wake_up(&runtime->sleep);
563 snd_pcm_stream_unlock_irq(substream);
567 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
568 struct snd_pcm_sw_params __user * _params)
570 struct snd_pcm_sw_params params;
572 if (copy_from_user(¶ms, _params, sizeof(params)))
574 err = snd_pcm_sw_params(substream, ¶ms);
575 if (copy_to_user(_params, ¶ms, sizeof(params)))
580 int snd_pcm_status(struct snd_pcm_substream *substream,
581 struct snd_pcm_status *status)
583 struct snd_pcm_runtime *runtime = substream->runtime;
585 snd_pcm_stream_lock_irq(substream);
586 status->state = runtime->status->state;
587 status->suspended_state = runtime->status->suspended_state;
588 if (status->state == SNDRV_PCM_STATE_OPEN)
590 status->trigger_tstamp = runtime->trigger_tstamp;
591 if (snd_pcm_running(substream))
592 snd_pcm_update_hw_ptr(substream);
593 snd_pcm_gettime(runtime, &status->tstamp);
594 status->appl_ptr = runtime->control->appl_ptr;
595 status->hw_ptr = runtime->status->hw_ptr;
596 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
597 status->avail = snd_pcm_playback_avail(runtime);
598 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
599 runtime->status->state == SNDRV_PCM_STATE_DRAINING)
600 status->delay = runtime->buffer_size - status->avail;
604 status->avail = snd_pcm_capture_avail(runtime);
605 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
606 status->delay = status->avail;
610 status->avail_max = runtime->avail_max;
611 status->overrange = runtime->overrange;
612 runtime->avail_max = 0;
613 runtime->overrange = 0;
615 snd_pcm_stream_unlock_irq(substream);
619 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
620 struct snd_pcm_status __user * _status)
622 struct snd_pcm_status status;
623 struct snd_pcm_runtime *runtime;
626 snd_assert(substream != NULL, return -ENXIO);
627 runtime = substream->runtime;
628 memset(&status, 0, sizeof(status));
629 res = snd_pcm_status(substream, &status);
632 if (copy_to_user(_status, &status, sizeof(status)))
637 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
638 struct snd_pcm_channel_info * info)
640 struct snd_pcm_runtime *runtime;
641 unsigned int channel;
643 snd_assert(substream != NULL, return -ENXIO);
644 channel = info->channel;
645 runtime = substream->runtime;
646 snd_pcm_stream_lock_irq(substream);
647 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
648 snd_pcm_stream_unlock_irq(substream);
651 snd_pcm_stream_unlock_irq(substream);
652 if (channel >= runtime->channels)
654 memset(info, 0, sizeof(*info));
655 info->channel = channel;
656 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
659 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
660 struct snd_pcm_channel_info __user * _info)
662 struct snd_pcm_channel_info info;
665 if (copy_from_user(&info, _info, sizeof(info)))
667 res = snd_pcm_channel_info(substream, &info);
670 if (copy_to_user(_info, &info, sizeof(info)))
675 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
677 struct snd_pcm_runtime *runtime = substream->runtime;
678 if (runtime->trigger_master == NULL)
680 if (runtime->trigger_master == substream) {
681 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
683 snd_pcm_trigger_tstamp(runtime->trigger_master);
684 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
686 runtime->trigger_master = NULL;
690 int (*pre_action)(struct snd_pcm_substream *substream, int state);
691 int (*do_action)(struct snd_pcm_substream *substream, int state);
692 void (*undo_action)(struct snd_pcm_substream *substream, int state);
693 void (*post_action)(struct snd_pcm_substream *substream, int state);
697 * this functions is core for handling of linked stream
698 * Note: the stream state might be changed also on failure
699 * Note2: call with calling stream lock + link lock
701 static int snd_pcm_action_group(struct action_ops *ops,
702 struct snd_pcm_substream *substream,
703 int state, int do_lock)
705 struct snd_pcm_substream *s = NULL;
706 struct snd_pcm_substream *s1;
709 snd_pcm_group_for_each_entry(s, substream) {
710 if (do_lock && s != substream)
711 spin_lock_nested(&s->self_group.lock,
712 SINGLE_DEPTH_NESTING);
713 res = ops->pre_action(s, state);
717 snd_pcm_group_for_each_entry(s, substream) {
718 res = ops->do_action(s, state);
720 if (ops->undo_action) {
721 snd_pcm_group_for_each_entry(s1, substream) {
722 if (s1 == s) /* failed stream */
724 ops->undo_action(s1, state);
727 s = NULL; /* unlock all */
731 snd_pcm_group_for_each_entry(s, substream) {
732 ops->post_action(s, state);
737 snd_pcm_group_for_each_entry(s1, substream) {
739 spin_unlock(&s1->self_group.lock);
740 if (s1 == s) /* end */
748 * Note: call with stream lock
750 static int snd_pcm_action_single(struct action_ops *ops,
751 struct snd_pcm_substream *substream,
756 res = ops->pre_action(substream, state);
759 res = ops->do_action(substream, state);
761 ops->post_action(substream, state);
762 else if (ops->undo_action)
763 ops->undo_action(substream, state);
768 * Note: call with stream lock
770 static int snd_pcm_action(struct action_ops *ops,
771 struct snd_pcm_substream *substream,
776 if (snd_pcm_stream_linked(substream)) {
777 if (!spin_trylock(&substream->group->lock)) {
778 spin_unlock(&substream->self_group.lock);
779 spin_lock(&substream->group->lock);
780 spin_lock(&substream->self_group.lock);
782 res = snd_pcm_action_group(ops, substream, state, 1);
783 spin_unlock(&substream->group->lock);
785 res = snd_pcm_action_single(ops, substream, state);
791 * Note: don't use any locks before
793 static int snd_pcm_action_lock_irq(struct action_ops *ops,
794 struct snd_pcm_substream *substream,
799 read_lock_irq(&snd_pcm_link_rwlock);
800 if (snd_pcm_stream_linked(substream)) {
801 spin_lock(&substream->group->lock);
802 spin_lock(&substream->self_group.lock);
803 res = snd_pcm_action_group(ops, substream, state, 1);
804 spin_unlock(&substream->self_group.lock);
805 spin_unlock(&substream->group->lock);
807 spin_lock(&substream->self_group.lock);
808 res = snd_pcm_action_single(ops, substream, state);
809 spin_unlock(&substream->self_group.lock);
811 read_unlock_irq(&snd_pcm_link_rwlock);
817 static int snd_pcm_action_nonatomic(struct action_ops *ops,
818 struct snd_pcm_substream *substream,
823 down_read(&snd_pcm_link_rwsem);
824 if (snd_pcm_stream_linked(substream))
825 res = snd_pcm_action_group(ops, substream, state, 0);
827 res = snd_pcm_action_single(ops, substream, state);
828 up_read(&snd_pcm_link_rwsem);
835 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
837 struct snd_pcm_runtime *runtime = substream->runtime;
838 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
840 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
841 !snd_pcm_playback_data(substream))
843 runtime->trigger_master = substream;
847 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
849 if (substream->runtime->trigger_master != substream)
851 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
854 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
856 if (substream->runtime->trigger_master == substream)
857 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
860 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
862 struct snd_pcm_runtime *runtime = substream->runtime;
863 snd_pcm_trigger_tstamp(substream);
864 runtime->status->state = state;
865 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
866 runtime->silence_size > 0)
867 snd_pcm_playback_silence(substream, ULONG_MAX);
868 if (runtime->sleep_min)
869 snd_pcm_tick_prepare(substream);
870 if (substream->timer)
871 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
872 &runtime->trigger_tstamp);
875 static struct action_ops snd_pcm_action_start = {
876 .pre_action = snd_pcm_pre_start,
877 .do_action = snd_pcm_do_start,
878 .undo_action = snd_pcm_undo_start,
879 .post_action = snd_pcm_post_start
884 * @substream: the PCM substream instance
886 * Start all linked streams.
888 int snd_pcm_start(struct snd_pcm_substream *substream)
890 return snd_pcm_action(&snd_pcm_action_start, substream,
891 SNDRV_PCM_STATE_RUNNING);
897 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
899 struct snd_pcm_runtime *runtime = substream->runtime;
900 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
902 runtime->trigger_master = substream;
906 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
908 if (substream->runtime->trigger_master == substream &&
909 snd_pcm_running(substream))
910 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
911 return 0; /* unconditonally stop all substreams */
914 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
916 struct snd_pcm_runtime *runtime = substream->runtime;
917 if (runtime->status->state != state) {
918 snd_pcm_trigger_tstamp(substream);
919 if (substream->timer)
920 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
921 &runtime->trigger_tstamp);
922 runtime->status->state = state;
923 snd_pcm_tick_set(substream, 0);
925 wake_up(&runtime->sleep);
928 static struct action_ops snd_pcm_action_stop = {
929 .pre_action = snd_pcm_pre_stop,
930 .do_action = snd_pcm_do_stop,
931 .post_action = snd_pcm_post_stop
936 * @substream: the PCM substream instance
937 * @state: PCM state after stopping the stream
939 * Try to stop all running streams in the substream group.
940 * The state of each stream is changed to the given value after that unconditionally.
942 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
944 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
947 EXPORT_SYMBOL(snd_pcm_stop);
951 * @substream: the PCM substream
953 * Stop the DMA only when the given stream is playback.
954 * The state is changed to SETUP.
955 * Unlike snd_pcm_stop(), this affects only the given stream.
957 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
959 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
960 SNDRV_PCM_STATE_SETUP);
966 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
968 struct snd_pcm_runtime *runtime = substream->runtime;
969 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
972 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
974 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
976 runtime->trigger_master = substream;
980 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
982 if (substream->runtime->trigger_master != substream)
984 return substream->ops->trigger(substream,
985 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
986 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
989 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
991 if (substream->runtime->trigger_master == substream)
992 substream->ops->trigger(substream,
993 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
994 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
997 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
999 struct snd_pcm_runtime *runtime = substream->runtime;
1000 snd_pcm_trigger_tstamp(substream);
1002 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1003 if (substream->timer)
1004 snd_timer_notify(substream->timer,
1005 SNDRV_TIMER_EVENT_MPAUSE,
1006 &runtime->trigger_tstamp);
1007 snd_pcm_tick_set(substream, 0);
1008 wake_up(&runtime->sleep);
1010 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1011 if (runtime->sleep_min)
1012 snd_pcm_tick_prepare(substream);
1013 if (substream->timer)
1014 snd_timer_notify(substream->timer,
1015 SNDRV_TIMER_EVENT_MCONTINUE,
1016 &runtime->trigger_tstamp);
1020 static struct action_ops snd_pcm_action_pause = {
1021 .pre_action = snd_pcm_pre_pause,
1022 .do_action = snd_pcm_do_pause,
1023 .undo_action = snd_pcm_undo_pause,
1024 .post_action = snd_pcm_post_pause
1028 * Push/release the pause for all linked streams.
1030 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1032 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1038 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1040 struct snd_pcm_runtime *runtime = substream->runtime;
1041 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1043 runtime->trigger_master = substream;
1047 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1049 struct snd_pcm_runtime *runtime = substream->runtime;
1050 if (runtime->trigger_master != substream)
1052 if (! snd_pcm_running(substream))
1054 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1055 return 0; /* suspend unconditionally */
1058 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1060 struct snd_pcm_runtime *runtime = substream->runtime;
1061 snd_pcm_trigger_tstamp(substream);
1062 if (substream->timer)
1063 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1064 &runtime->trigger_tstamp);
1065 runtime->status->suspended_state = runtime->status->state;
1066 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1067 snd_pcm_tick_set(substream, 0);
1068 wake_up(&runtime->sleep);
1071 static struct action_ops snd_pcm_action_suspend = {
1072 .pre_action = snd_pcm_pre_suspend,
1073 .do_action = snd_pcm_do_suspend,
1074 .post_action = snd_pcm_post_suspend
1079 * @substream: the PCM substream
1081 * Trigger SUSPEND to all linked streams.
1082 * After this call, all streams are changed to SUSPENDED state.
1084 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1087 unsigned long flags;
1092 snd_pcm_stream_lock_irqsave(substream, flags);
1093 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1094 snd_pcm_stream_unlock_irqrestore(substream, flags);
1098 EXPORT_SYMBOL(snd_pcm_suspend);
1101 * snd_pcm_suspend_all
1102 * @pcm: the PCM instance
1104 * Trigger SUSPEND to all substreams in the given pcm.
1105 * After this call, all streams are changed to SUSPENDED state.
1107 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1109 struct snd_pcm_substream *substream;
1110 int stream, err = 0;
1115 for (stream = 0; stream < 2; stream++) {
1116 for (substream = pcm->streams[stream].substream;
1117 substream; substream = substream->next) {
1118 /* FIXME: the open/close code should lock this as well */
1119 if (substream->runtime == NULL)
1121 err = snd_pcm_suspend(substream);
1122 if (err < 0 && err != -EBUSY)
1129 EXPORT_SYMBOL(snd_pcm_suspend_all);
1133 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1135 struct snd_pcm_runtime *runtime = substream->runtime;
1136 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1138 runtime->trigger_master = substream;
1142 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1144 struct snd_pcm_runtime *runtime = substream->runtime;
1145 if (runtime->trigger_master != substream)
1147 /* DMA not running previously? */
1148 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1149 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1150 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1152 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1155 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1157 if (substream->runtime->trigger_master == substream &&
1158 snd_pcm_running(substream))
1159 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1162 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1164 struct snd_pcm_runtime *runtime = substream->runtime;
1165 snd_pcm_trigger_tstamp(substream);
1166 if (substream->timer)
1167 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1168 &runtime->trigger_tstamp);
1169 runtime->status->state = runtime->status->suspended_state;
1170 if (runtime->sleep_min)
1171 snd_pcm_tick_prepare(substream);
1174 static struct action_ops snd_pcm_action_resume = {
1175 .pre_action = snd_pcm_pre_resume,
1176 .do_action = snd_pcm_do_resume,
1177 .undo_action = snd_pcm_undo_resume,
1178 .post_action = snd_pcm_post_resume
1181 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1183 struct snd_card *card = substream->pcm->card;
1186 snd_power_lock(card);
1187 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1188 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1189 snd_power_unlock(card);
1195 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1200 #endif /* CONFIG_PM */
1205 * Change the RUNNING stream(s) to XRUN state.
1207 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1209 struct snd_card *card = substream->pcm->card;
1210 struct snd_pcm_runtime *runtime = substream->runtime;
1213 snd_power_lock(card);
1214 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1215 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1220 snd_pcm_stream_lock_irq(substream);
1221 switch (runtime->status->state) {
1222 case SNDRV_PCM_STATE_XRUN:
1223 result = 0; /* already there */
1225 case SNDRV_PCM_STATE_RUNNING:
1226 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1231 snd_pcm_stream_unlock_irq(substream);
1233 snd_power_unlock(card);
1240 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1242 struct snd_pcm_runtime *runtime = substream->runtime;
1243 switch (runtime->status->state) {
1244 case SNDRV_PCM_STATE_RUNNING:
1245 case SNDRV_PCM_STATE_PREPARED:
1246 case SNDRV_PCM_STATE_PAUSED:
1247 case SNDRV_PCM_STATE_SUSPENDED:
1254 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1256 struct snd_pcm_runtime *runtime = substream->runtime;
1257 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1260 // snd_assert(runtime->status->hw_ptr < runtime->buffer_size, );
1261 runtime->hw_ptr_base = 0;
1262 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1263 runtime->status->hw_ptr % runtime->period_size;
1264 runtime->silence_start = runtime->status->hw_ptr;
1265 runtime->silence_filled = 0;
1269 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1271 struct snd_pcm_runtime *runtime = substream->runtime;
1272 runtime->control->appl_ptr = runtime->status->hw_ptr;
1273 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1274 runtime->silence_size > 0)
1275 snd_pcm_playback_silence(substream, ULONG_MAX);
1278 static struct action_ops snd_pcm_action_reset = {
1279 .pre_action = snd_pcm_pre_reset,
1280 .do_action = snd_pcm_do_reset,
1281 .post_action = snd_pcm_post_reset
1284 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1286 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1292 /* we use the second argument for updating f_flags */
1293 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1296 struct snd_pcm_runtime *runtime = substream->runtime;
1297 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1298 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1300 if (snd_pcm_running(substream))
1302 substream->f_flags = f_flags;
1306 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1309 err = substream->ops->prepare(substream);
1312 return snd_pcm_do_reset(substream, 0);
1315 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1317 struct snd_pcm_runtime *runtime = substream->runtime;
1318 runtime->control->appl_ptr = runtime->status->hw_ptr;
1319 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1322 static struct action_ops snd_pcm_action_prepare = {
1323 .pre_action = snd_pcm_pre_prepare,
1324 .do_action = snd_pcm_do_prepare,
1325 .post_action = snd_pcm_post_prepare
1330 * @substream: the PCM substream instance
1331 * @file: file to refer f_flags
1333 * Prepare the PCM substream to be triggerable.
1335 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1339 struct snd_card *card = substream->pcm->card;
1343 f_flags = file->f_flags;
1345 f_flags = substream->f_flags;
1347 snd_power_lock(card);
1348 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1349 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1350 substream, f_flags);
1351 snd_power_unlock(card);
1359 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1361 if (substream->f_flags & O_NONBLOCK)
1363 substream->runtime->trigger_master = substream;
1367 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1369 struct snd_pcm_runtime *runtime = substream->runtime;
1370 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1371 switch (runtime->status->state) {
1372 case SNDRV_PCM_STATE_PREPARED:
1373 /* start playback stream if possible */
1374 if (! snd_pcm_playback_empty(substream)) {
1375 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1376 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1379 case SNDRV_PCM_STATE_RUNNING:
1380 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1386 /* stop running stream */
1387 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1388 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1389 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1390 snd_pcm_do_stop(substream, new_state);
1391 snd_pcm_post_stop(substream, new_state);
1397 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1401 static struct action_ops snd_pcm_action_drain_init = {
1402 .pre_action = snd_pcm_pre_drain_init,
1403 .do_action = snd_pcm_do_drain_init,
1404 .post_action = snd_pcm_post_drain_init
1408 struct snd_pcm_substream *substream;
1410 snd_pcm_uframes_t stop_threshold;
1413 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1416 * Drain the stream(s).
1417 * When the substream is linked, sync until the draining of all playback streams
1419 * After this call, all streams are supposed to be either SETUP or DRAINING
1420 * (capture only) state.
1422 static int snd_pcm_drain(struct snd_pcm_substream *substream)
1424 struct snd_card *card;
1425 struct snd_pcm_runtime *runtime;
1426 struct snd_pcm_substream *s;
1429 struct drain_rec *drec, drec_tmp, *d;
1431 snd_assert(substream != NULL, return -ENXIO);
1432 card = substream->pcm->card;
1433 runtime = substream->runtime;
1435 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1438 snd_power_lock(card);
1439 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1440 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1442 snd_power_unlock(card);
1447 /* allocate temporary record for drain sync */
1448 down_read(&snd_pcm_link_rwsem);
1449 if (snd_pcm_stream_linked(substream)) {
1450 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1452 up_read(&snd_pcm_link_rwsem);
1453 snd_power_unlock(card);
1459 /* count only playback streams */
1461 snd_pcm_group_for_each_entry(s, substream) {
1462 runtime = s->runtime;
1463 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1464 d = &drec[num_drecs++];
1466 init_waitqueue_entry(&d->wait, current);
1467 add_wait_queue(&runtime->sleep, &d->wait);
1468 /* stop_threshold fixup to avoid endless loop when
1469 * stop_threshold > buffer_size
1471 d->stop_threshold = runtime->stop_threshold;
1472 if (runtime->stop_threshold > runtime->buffer_size)
1473 runtime->stop_threshold = runtime->buffer_size;
1476 up_read(&snd_pcm_link_rwsem);
1478 snd_pcm_stream_lock_irq(substream);
1480 if (substream->runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1481 snd_pcm_pause(substream, 0);
1483 /* pre-start/stop - all running streams are changed to DRAINING state */
1484 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1486 snd_pcm_stream_unlock_irq(substream);
1492 if (signal_pending(current)) {
1493 result = -ERESTARTSYS;
1497 for (i = 0; i < num_drecs; i++) {
1498 runtime = drec[i].substream->runtime;
1499 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1503 break; /* yes, all drained */
1505 set_current_state(TASK_INTERRUPTIBLE);
1506 snd_pcm_stream_unlock_irq(substream);
1507 snd_power_unlock(card);
1508 tout = schedule_timeout(10 * HZ);
1509 snd_power_lock(card);
1510 snd_pcm_stream_lock_irq(substream);
1512 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1515 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1516 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1523 snd_pcm_stream_unlock_irq(substream);
1526 for (i = 0; i < num_drecs; i++) {
1528 runtime = d->substream->runtime;
1529 remove_wait_queue(&runtime->sleep, &d->wait);
1530 runtime->stop_threshold = d->stop_threshold;
1533 if (drec != &drec_tmp)
1535 snd_power_unlock(card);
1543 * Immediately put all linked substreams into SETUP state.
1545 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1547 struct snd_pcm_runtime *runtime;
1548 struct snd_card *card;
1551 snd_assert(substream != NULL, return -ENXIO);
1552 runtime = substream->runtime;
1553 card = substream->pcm->card;
1555 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1556 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1559 snd_power_lock(card);
1560 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1561 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1566 snd_pcm_stream_lock_irq(substream);
1568 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1569 snd_pcm_pause(substream, 0);
1571 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1572 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1573 snd_pcm_stream_unlock_irq(substream);
1575 snd_power_unlock(card);
1580 /* WARNING: Don't forget to fput back the file */
1581 static struct file *snd_pcm_file_fd(int fd)
1584 struct inode *inode;
1590 inode = file->f_path.dentry->d_inode;
1591 if (!S_ISCHR(inode->i_mode) ||
1592 imajor(inode) != snd_major) {
1596 minor = iminor(inode);
1597 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1598 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1608 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1612 struct snd_pcm_file *pcm_file;
1613 struct snd_pcm_substream *substream1;
1615 file = snd_pcm_file_fd(fd);
1618 pcm_file = file->private_data;
1619 substream1 = pcm_file->substream;
1620 down_write(&snd_pcm_link_rwsem);
1621 write_lock_irq(&snd_pcm_link_rwlock);
1622 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1623 substream->runtime->status->state != substream1->runtime->status->state) {
1627 if (snd_pcm_stream_linked(substream1)) {
1631 if (!snd_pcm_stream_linked(substream)) {
1632 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1633 if (substream->group == NULL) {
1637 spin_lock_init(&substream->group->lock);
1638 INIT_LIST_HEAD(&substream->group->substreams);
1639 list_add_tail(&substream->link_list, &substream->group->substreams);
1640 substream->group->count = 1;
1642 list_add_tail(&substream1->link_list, &substream->group->substreams);
1643 substream->group->count++;
1644 substream1->group = substream->group;
1646 write_unlock_irq(&snd_pcm_link_rwlock);
1647 up_write(&snd_pcm_link_rwsem);
1652 static void relink_to_local(struct snd_pcm_substream *substream)
1654 substream->group = &substream->self_group;
1655 INIT_LIST_HEAD(&substream->self_group.substreams);
1656 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1659 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1661 struct snd_pcm_substream *s;
1664 down_write(&snd_pcm_link_rwsem);
1665 write_lock_irq(&snd_pcm_link_rwlock);
1666 if (!snd_pcm_stream_linked(substream)) {
1670 list_del(&substream->link_list);
1671 substream->group->count--;
1672 if (substream->group->count == 1) { /* detach the last stream, too */
1673 snd_pcm_group_for_each_entry(s, substream) {
1677 kfree(substream->group);
1679 relink_to_local(substream);
1681 write_unlock_irq(&snd_pcm_link_rwlock);
1682 up_write(&snd_pcm_link_rwsem);
1689 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1690 struct snd_pcm_hw_rule *rule)
1692 struct snd_interval t;
1693 snd_interval_mul(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_div(struct snd_pcm_hw_params *params,
1699 struct snd_pcm_hw_rule *rule)
1701 struct snd_interval t;
1702 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1703 hw_param_interval_c(params, rule->deps[1]), &t);
1704 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1707 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1708 struct snd_pcm_hw_rule *rule)
1710 struct snd_interval t;
1711 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1712 hw_param_interval_c(params, rule->deps[1]),
1713 (unsigned long) rule->private, &t);
1714 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1717 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1718 struct snd_pcm_hw_rule *rule)
1720 struct snd_interval t;
1721 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1722 (unsigned long) rule->private,
1723 hw_param_interval_c(params, rule->deps[1]), &t);
1724 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1727 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1728 struct snd_pcm_hw_rule *rule)
1731 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1733 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1735 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1737 if (! snd_mask_test(mask, k))
1739 bits = snd_pcm_format_physical_width(k);
1741 continue; /* ignore invalid formats */
1742 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1743 snd_mask_reset(&m, k);
1745 return snd_mask_refine(mask, &m);
1748 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1749 struct snd_pcm_hw_rule *rule)
1751 struct snd_interval t;
1757 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1759 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1761 bits = snd_pcm_format_physical_width(k);
1763 continue; /* ignore invalid formats */
1764 if (t.min > (unsigned)bits)
1766 if (t.max < (unsigned)bits)
1770 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1773 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1774 #error "Change this table"
1777 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1778 48000, 64000, 88200, 96000, 176400, 192000 };
1780 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1781 .count = ARRAY_SIZE(rates),
1785 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1786 struct snd_pcm_hw_rule *rule)
1788 struct snd_pcm_hardware *hw = rule->private;
1789 return snd_interval_list(hw_param_interval(params, rule->var),
1790 snd_pcm_known_rates.count,
1791 snd_pcm_known_rates.list, hw->rates);
1794 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1795 struct snd_pcm_hw_rule *rule)
1797 struct snd_interval t;
1798 struct snd_pcm_substream *substream = rule->private;
1800 t.max = substream->buffer_bytes_max;
1804 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1807 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1809 struct snd_pcm_runtime *runtime = substream->runtime;
1810 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1813 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1814 snd_mask_any(constrs_mask(constrs, k));
1817 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1818 snd_interval_any(constrs_interval(constrs, k));
1821 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1822 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1823 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1824 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1825 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1827 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1828 snd_pcm_hw_rule_format, NULL,
1829 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1832 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1833 snd_pcm_hw_rule_sample_bits, NULL,
1834 SNDRV_PCM_HW_PARAM_FORMAT,
1835 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1838 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1839 snd_pcm_hw_rule_div, NULL,
1840 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1843 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1844 snd_pcm_hw_rule_mul, NULL,
1845 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1848 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1849 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1850 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1853 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1854 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1855 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1858 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1859 snd_pcm_hw_rule_div, NULL,
1860 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1863 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1864 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1865 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1868 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1869 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1870 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1873 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1874 snd_pcm_hw_rule_div, NULL,
1875 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1878 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1879 snd_pcm_hw_rule_div, NULL,
1880 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1883 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1884 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1885 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1888 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1889 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1890 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1893 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1894 snd_pcm_hw_rule_mul, NULL,
1895 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1898 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1899 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1900 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1903 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1904 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1905 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1908 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1909 snd_pcm_hw_rule_muldivk, (void*) 8,
1910 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1913 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1914 snd_pcm_hw_rule_muldivk, (void*) 8,
1915 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1918 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1919 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1920 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1923 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1924 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1925 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1931 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1933 struct snd_pcm_runtime *runtime = substream->runtime;
1934 struct snd_pcm_hardware *hw = &runtime->hw;
1936 unsigned int mask = 0;
1938 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1939 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1940 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1941 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1942 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1943 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1944 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1945 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1946 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1947 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1948 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1950 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1951 snd_assert(err >= 0, return -EINVAL);
1953 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1954 snd_assert(err >= 0, return -EINVAL);
1956 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1957 snd_assert(err >= 0, return -EINVAL);
1959 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1960 hw->channels_min, hw->channels_max);
1961 snd_assert(err >= 0, return -EINVAL);
1963 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1964 hw->rate_min, hw->rate_max);
1965 snd_assert(err >= 0, return -EINVAL);
1967 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1968 hw->period_bytes_min, hw->period_bytes_max);
1969 snd_assert(err >= 0, return -EINVAL);
1971 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1972 hw->periods_min, hw->periods_max);
1973 snd_assert(err >= 0, return -EINVAL);
1975 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1976 hw->period_bytes_min, hw->buffer_bytes_max);
1977 snd_assert(err >= 0, return -EINVAL);
1979 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1980 snd_pcm_hw_rule_buffer_bytes_max, substream,
1981 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1986 if (runtime->dma_bytes) {
1987 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1988 snd_assert(err >= 0, return -EINVAL);
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_minmax(runtime, SNDRV_PCM_HW_PARAM_TICK_TIME,
2001 1000000 / HZ, 1000000 / HZ);
2002 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2007 static void pcm_release_private(struct snd_pcm_substream *substream)
2009 snd_pcm_unlink(substream);
2012 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2014 substream->ref_count--;
2015 if (substream->ref_count > 0)
2018 snd_pcm_drop(substream);
2019 if (substream->hw_opened) {
2020 if (substream->ops->hw_free != NULL)
2021 substream->ops->hw_free(substream);
2022 substream->ops->close(substream);
2023 substream->hw_opened = 0;
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,
2079 struct snd_pcm_file **rpcm_file)
2081 struct snd_pcm_file *pcm_file;
2082 struct snd_pcm_substream *substream;
2083 struct snd_pcm_str *str;
2086 snd_assert(rpcm_file != NULL, return -EINVAL);
2089 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2093 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2094 if (pcm_file == NULL) {
2095 snd_pcm_release_substream(substream);
2098 pcm_file->substream = substream;
2099 if (substream->ref_count == 1) {
2100 str = substream->pstr;
2101 substream->file = pcm_file;
2102 substream->pcm_release = pcm_release_private;
2104 file->private_data = pcm_file;
2105 *rpcm_file = pcm_file;
2109 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2111 struct snd_pcm *pcm;
2113 pcm = snd_lookup_minor_data(iminor(inode),
2114 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2115 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2118 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2120 struct snd_pcm *pcm;
2122 pcm = snd_lookup_minor_data(iminor(inode),
2123 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2124 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2127 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2130 struct snd_pcm_file *pcm_file;
2137 err = snd_card_file_add(pcm->card, file);
2140 if (!try_module_get(pcm->card->module)) {
2144 init_waitqueue_entry(&wait, current);
2145 add_wait_queue(&pcm->open_wait, &wait);
2146 mutex_lock(&pcm->open_mutex);
2148 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2151 if (err == -EAGAIN) {
2152 if (file->f_flags & O_NONBLOCK) {
2158 set_current_state(TASK_INTERRUPTIBLE);
2159 mutex_unlock(&pcm->open_mutex);
2161 mutex_lock(&pcm->open_mutex);
2162 if (signal_pending(current)) {
2167 remove_wait_queue(&pcm->open_wait, &wait);
2168 mutex_unlock(&pcm->open_mutex);
2174 module_put(pcm->card->module);
2176 snd_card_file_remove(pcm->card, file);
2181 static int snd_pcm_release(struct inode *inode, struct file *file)
2183 struct snd_pcm *pcm;
2184 struct snd_pcm_substream *substream;
2185 struct snd_pcm_file *pcm_file;
2187 pcm_file = file->private_data;
2188 substream = pcm_file->substream;
2189 snd_assert(substream != NULL, return -ENXIO);
2190 pcm = substream->pcm;
2191 fasync_helper(-1, file, 0, &substream->runtime->fasync);
2192 mutex_lock(&pcm->open_mutex);
2193 snd_pcm_release_substream(substream);
2195 mutex_unlock(&pcm->open_mutex);
2196 wake_up(&pcm->open_wait);
2197 module_put(pcm->card->module);
2198 snd_card_file_remove(pcm->card, file);
2202 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2203 snd_pcm_uframes_t frames)
2205 struct snd_pcm_runtime *runtime = substream->runtime;
2206 snd_pcm_sframes_t appl_ptr;
2207 snd_pcm_sframes_t ret;
2208 snd_pcm_sframes_t hw_avail;
2213 snd_pcm_stream_lock_irq(substream);
2214 switch (runtime->status->state) {
2215 case SNDRV_PCM_STATE_PREPARED:
2217 case SNDRV_PCM_STATE_DRAINING:
2218 case SNDRV_PCM_STATE_RUNNING:
2219 if (snd_pcm_update_hw_ptr(substream) >= 0)
2222 case SNDRV_PCM_STATE_XRUN:
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;
2241 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2243 snd_pcm_tick_prepare(substream);
2246 snd_pcm_stream_unlock_irq(substream);
2250 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2251 snd_pcm_uframes_t frames)
2253 struct snd_pcm_runtime *runtime = substream->runtime;
2254 snd_pcm_sframes_t appl_ptr;
2255 snd_pcm_sframes_t ret;
2256 snd_pcm_sframes_t hw_avail;
2261 snd_pcm_stream_lock_irq(substream);
2262 switch (runtime->status->state) {
2263 case SNDRV_PCM_STATE_PREPARED:
2264 case SNDRV_PCM_STATE_DRAINING:
2266 case SNDRV_PCM_STATE_RUNNING:
2267 if (snd_pcm_update_hw_ptr(substream) >= 0)
2270 case SNDRV_PCM_STATE_XRUN:
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;
2289 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2291 snd_pcm_tick_prepare(substream);
2294 snd_pcm_stream_unlock_irq(substream);
2298 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2299 snd_pcm_uframes_t frames)
2301 struct snd_pcm_runtime *runtime = substream->runtime;
2302 snd_pcm_sframes_t appl_ptr;
2303 snd_pcm_sframes_t ret;
2304 snd_pcm_sframes_t avail;
2309 snd_pcm_stream_lock_irq(substream);
2310 switch (runtime->status->state) {
2311 case SNDRV_PCM_STATE_PREPARED:
2312 case SNDRV_PCM_STATE_PAUSED:
2314 case SNDRV_PCM_STATE_DRAINING:
2315 case SNDRV_PCM_STATE_RUNNING:
2316 if (snd_pcm_update_hw_ptr(substream) >= 0)
2319 case SNDRV_PCM_STATE_XRUN:
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;
2338 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2340 snd_pcm_tick_prepare(substream);
2343 snd_pcm_stream_unlock_irq(substream);
2347 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2348 snd_pcm_uframes_t frames)
2350 struct snd_pcm_runtime *runtime = substream->runtime;
2351 snd_pcm_sframes_t appl_ptr;
2352 snd_pcm_sframes_t ret;
2353 snd_pcm_sframes_t avail;
2358 snd_pcm_stream_lock_irq(substream);
2359 switch (runtime->status->state) {
2360 case SNDRV_PCM_STATE_PREPARED:
2361 case SNDRV_PCM_STATE_DRAINING:
2362 case SNDRV_PCM_STATE_PAUSED:
2364 case SNDRV_PCM_STATE_RUNNING:
2365 if (snd_pcm_update_hw_ptr(substream) >= 0)
2368 case SNDRV_PCM_STATE_XRUN:
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;
2387 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING &&
2389 snd_pcm_tick_prepare(substream);
2392 snd_pcm_stream_unlock_irq(substream);
2396 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2398 struct snd_pcm_runtime *runtime = substream->runtime;
2401 snd_pcm_stream_lock_irq(substream);
2402 switch (runtime->status->state) {
2403 case SNDRV_PCM_STATE_DRAINING:
2404 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2406 case SNDRV_PCM_STATE_RUNNING:
2407 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2410 case SNDRV_PCM_STATE_PREPARED:
2411 case SNDRV_PCM_STATE_SUSPENDED:
2414 case SNDRV_PCM_STATE_XRUN:
2422 snd_pcm_stream_unlock_irq(substream);
2426 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2427 snd_pcm_sframes_t __user *res)
2429 struct snd_pcm_runtime *runtime = substream->runtime;
2431 snd_pcm_sframes_t n = 0;
2433 snd_pcm_stream_lock_irq(substream);
2434 switch (runtime->status->state) {
2435 case SNDRV_PCM_STATE_DRAINING:
2436 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2438 case SNDRV_PCM_STATE_RUNNING:
2439 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2442 case SNDRV_PCM_STATE_PREPARED:
2443 case SNDRV_PCM_STATE_SUSPENDED:
2445 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2446 n = snd_pcm_playback_hw_avail(runtime);
2448 n = snd_pcm_capture_avail(runtime);
2450 case SNDRV_PCM_STATE_XRUN:
2458 snd_pcm_stream_unlock_irq(substream);
2460 if (put_user(n, res))
2465 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2466 struct snd_pcm_sync_ptr __user *_sync_ptr)
2468 struct snd_pcm_runtime *runtime = substream->runtime;
2469 struct snd_pcm_sync_ptr sync_ptr;
2470 volatile struct snd_pcm_mmap_status *status;
2471 volatile struct snd_pcm_mmap_control *control;
2474 memset(&sync_ptr, 0, sizeof(sync_ptr));
2475 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2477 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2479 status = runtime->status;
2480 control = runtime->control;
2481 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2482 err = snd_pcm_hwsync(substream);
2486 snd_pcm_stream_lock_irq(substream);
2487 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2488 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2490 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2491 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2492 control->avail_min = sync_ptr.c.control.avail_min;
2494 sync_ptr.c.control.avail_min = control->avail_min;
2495 sync_ptr.s.status.state = status->state;
2496 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2497 sync_ptr.s.status.tstamp = status->tstamp;
2498 sync_ptr.s.status.suspended_state = status->suspended_state;
2499 snd_pcm_stream_unlock_irq(substream);
2500 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2505 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2507 struct snd_pcm_runtime *runtime = substream->runtime;
2510 if (get_user(arg, _arg))
2512 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2514 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2515 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2516 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2520 static int snd_pcm_common_ioctl1(struct file *file,
2521 struct snd_pcm_substream *substream,
2522 unsigned int cmd, void __user *arg)
2524 snd_assert(substream != NULL, return -ENXIO);
2527 case SNDRV_PCM_IOCTL_PVERSION:
2528 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2529 case SNDRV_PCM_IOCTL_INFO:
2530 return snd_pcm_info_user(substream, arg);
2531 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2533 case SNDRV_PCM_IOCTL_TTSTAMP:
2534 return snd_pcm_tstamp(substream, arg);
2535 case SNDRV_PCM_IOCTL_HW_REFINE:
2536 return snd_pcm_hw_refine_user(substream, arg);
2537 case SNDRV_PCM_IOCTL_HW_PARAMS:
2538 return snd_pcm_hw_params_user(substream, arg);
2539 case SNDRV_PCM_IOCTL_HW_FREE:
2540 return snd_pcm_hw_free(substream);
2541 case SNDRV_PCM_IOCTL_SW_PARAMS:
2542 return snd_pcm_sw_params_user(substream, arg);
2543 case SNDRV_PCM_IOCTL_STATUS:
2544 return snd_pcm_status_user(substream, arg);
2545 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2546 return snd_pcm_channel_info_user(substream, arg);
2547 case SNDRV_PCM_IOCTL_PREPARE:
2548 return snd_pcm_prepare(substream, file);
2549 case SNDRV_PCM_IOCTL_RESET:
2550 return snd_pcm_reset(substream);
2551 case SNDRV_PCM_IOCTL_START:
2552 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2553 case SNDRV_PCM_IOCTL_LINK:
2554 return snd_pcm_link(substream, (int)(unsigned long) arg);
2555 case SNDRV_PCM_IOCTL_UNLINK:
2556 return snd_pcm_unlink(substream);
2557 case SNDRV_PCM_IOCTL_RESUME:
2558 return snd_pcm_resume(substream);
2559 case SNDRV_PCM_IOCTL_XRUN:
2560 return snd_pcm_xrun(substream);
2561 case SNDRV_PCM_IOCTL_HWSYNC:
2562 return snd_pcm_hwsync(substream);
2563 case SNDRV_PCM_IOCTL_DELAY:
2564 return snd_pcm_delay(substream, arg);
2565 case SNDRV_PCM_IOCTL_SYNC_PTR:
2566 return snd_pcm_sync_ptr(substream, arg);
2567 #ifdef CONFIG_SND_SUPPORT_OLD_API
2568 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2569 return snd_pcm_hw_refine_old_user(substream, arg);
2570 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2571 return snd_pcm_hw_params_old_user(substream, arg);
2573 case SNDRV_PCM_IOCTL_DRAIN:
2574 return snd_pcm_drain(substream);
2575 case SNDRV_PCM_IOCTL_DROP:
2576 return snd_pcm_drop(substream);
2577 case SNDRV_PCM_IOCTL_PAUSE:
2580 snd_pcm_stream_lock_irq(substream);
2581 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2582 snd_pcm_stream_unlock_irq(substream);
2586 snd_printd("unknown ioctl = 0x%x\n", cmd);
2590 static int snd_pcm_playback_ioctl1(struct file *file,
2591 struct snd_pcm_substream *substream,
2592 unsigned int cmd, void __user *arg)
2594 snd_assert(substream != NULL, return -ENXIO);
2595 snd_assert(substream->stream == SNDRV_PCM_STREAM_PLAYBACK, return -EINVAL);
2597 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2599 struct snd_xferi xferi;
2600 struct snd_xferi __user *_xferi = arg;
2601 struct snd_pcm_runtime *runtime = substream->runtime;
2602 snd_pcm_sframes_t result;
2603 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2605 if (put_user(0, &_xferi->result))
2607 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2609 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2610 __put_user(result, &_xferi->result);
2611 return result < 0 ? result : 0;
2613 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2615 struct snd_xfern xfern;
2616 struct snd_xfern __user *_xfern = arg;
2617 struct snd_pcm_runtime *runtime = substream->runtime;
2619 snd_pcm_sframes_t result;
2620 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2622 if (runtime->channels > 128)
2624 if (put_user(0, &_xfern->result))
2626 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2628 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2631 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2635 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2637 __put_user(result, &_xfern->result);
2638 return result < 0 ? result : 0;
2640 case SNDRV_PCM_IOCTL_REWIND:
2642 snd_pcm_uframes_t frames;
2643 snd_pcm_uframes_t __user *_frames = arg;
2644 snd_pcm_sframes_t result;
2645 if (get_user(frames, _frames))
2647 if (put_user(0, _frames))
2649 result = snd_pcm_playback_rewind(substream, frames);
2650 __put_user(result, _frames);
2651 return result < 0 ? result : 0;
2653 case SNDRV_PCM_IOCTL_FORWARD:
2655 snd_pcm_uframes_t frames;
2656 snd_pcm_uframes_t __user *_frames = arg;
2657 snd_pcm_sframes_t result;
2658 if (get_user(frames, _frames))
2660 if (put_user(0, _frames))
2662 result = snd_pcm_playback_forward(substream, frames);
2663 __put_user(result, _frames);
2664 return result < 0 ? result : 0;
2667 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2670 static int snd_pcm_capture_ioctl1(struct file *file,
2671 struct snd_pcm_substream *substream,
2672 unsigned int cmd, void __user *arg)
2674 snd_assert(substream != NULL, return -ENXIO);
2675 snd_assert(substream->stream == SNDRV_PCM_STREAM_CAPTURE, return -EINVAL);
2677 case SNDRV_PCM_IOCTL_READI_FRAMES:
2679 struct snd_xferi xferi;
2680 struct snd_xferi __user *_xferi = arg;
2681 struct snd_pcm_runtime *runtime = substream->runtime;
2682 snd_pcm_sframes_t result;
2683 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2685 if (put_user(0, &_xferi->result))
2687 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2689 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2690 __put_user(result, &_xferi->result);
2691 return result < 0 ? result : 0;
2693 case SNDRV_PCM_IOCTL_READN_FRAMES:
2695 struct snd_xfern xfern;
2696 struct snd_xfern __user *_xfern = arg;
2697 struct snd_pcm_runtime *runtime = substream->runtime;
2699 snd_pcm_sframes_t result;
2700 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2702 if (runtime->channels > 128)
2704 if (put_user(0, &_xfern->result))
2706 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2708 bufs = kmalloc(sizeof(void *) * runtime->channels, GFP_KERNEL);
2711 if (copy_from_user(bufs, xfern.bufs, sizeof(void *) * runtime->channels)) {
2715 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2717 __put_user(result, &_xfern->result);
2718 return result < 0 ? result : 0;
2720 case SNDRV_PCM_IOCTL_REWIND:
2722 snd_pcm_uframes_t frames;
2723 snd_pcm_uframes_t __user *_frames = arg;
2724 snd_pcm_sframes_t result;
2725 if (get_user(frames, _frames))
2727 if (put_user(0, _frames))
2729 result = snd_pcm_capture_rewind(substream, frames);
2730 __put_user(result, _frames);
2731 return result < 0 ? result : 0;
2733 case SNDRV_PCM_IOCTL_FORWARD:
2735 snd_pcm_uframes_t frames;
2736 snd_pcm_uframes_t __user *_frames = arg;
2737 snd_pcm_sframes_t result;
2738 if (get_user(frames, _frames))
2740 if (put_user(0, _frames))
2742 result = snd_pcm_capture_forward(substream, frames);
2743 __put_user(result, _frames);
2744 return result < 0 ? result : 0;
2747 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2750 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2753 struct snd_pcm_file *pcm_file;
2755 pcm_file = file->private_data;
2757 if (((cmd >> 8) & 0xff) != 'A')
2760 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2761 (void __user *)arg);
2764 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2767 struct snd_pcm_file *pcm_file;
2769 pcm_file = file->private_data;
2771 if (((cmd >> 8) & 0xff) != 'A')
2774 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2775 (void __user *)arg);
2778 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2779 unsigned int cmd, void *arg)
2784 fs = snd_enter_user();
2785 switch (substream->stream) {
2786 case SNDRV_PCM_STREAM_PLAYBACK:
2787 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2788 (void __user *)arg);
2790 case SNDRV_PCM_STREAM_CAPTURE:
2791 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2792 (void __user *)arg);
2802 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2804 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2807 struct snd_pcm_file *pcm_file;
2808 struct snd_pcm_substream *substream;
2809 struct snd_pcm_runtime *runtime;
2810 snd_pcm_sframes_t result;
2812 pcm_file = file->private_data;
2813 substream = pcm_file->substream;
2814 snd_assert(substream != NULL, return -ENXIO);
2815 runtime = substream->runtime;
2816 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2818 if (!frame_aligned(runtime, count))
2820 count = bytes_to_frames(runtime, count);
2821 result = snd_pcm_lib_read(substream, buf, count);
2823 result = frames_to_bytes(runtime, result);
2827 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2828 size_t count, loff_t * offset)
2830 struct snd_pcm_file *pcm_file;
2831 struct snd_pcm_substream *substream;
2832 struct snd_pcm_runtime *runtime;
2833 snd_pcm_sframes_t result;
2835 pcm_file = file->private_data;
2836 substream = pcm_file->substream;
2837 snd_assert(substream != NULL, result = -ENXIO; goto end);
2838 runtime = substream->runtime;
2839 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2843 if (!frame_aligned(runtime, count)) {
2847 count = bytes_to_frames(runtime, count);
2848 result = snd_pcm_lib_write(substream, buf, count);
2850 result = frames_to_bytes(runtime, result);
2855 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2856 unsigned long nr_segs, loff_t pos)
2859 struct snd_pcm_file *pcm_file;
2860 struct snd_pcm_substream *substream;
2861 struct snd_pcm_runtime *runtime;
2862 snd_pcm_sframes_t result;
2865 snd_pcm_uframes_t frames;
2867 pcm_file = iocb->ki_filp->private_data;
2868 substream = pcm_file->substream;
2869 snd_assert(substream != NULL, return -ENXIO);
2870 runtime = substream->runtime;
2871 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2873 if (nr_segs > 1024 || nr_segs != runtime->channels)
2875 if (!frame_aligned(runtime, iov->iov_len))
2877 frames = bytes_to_samples(runtime, iov->iov_len);
2878 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2881 for (i = 0; i < nr_segs; ++i)
2882 bufs[i] = iov[i].iov_base;
2883 result = snd_pcm_lib_readv(substream, bufs, frames);
2885 result = frames_to_bytes(runtime, result);
2890 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2891 unsigned long nr_segs, loff_t pos)
2893 struct snd_pcm_file *pcm_file;
2894 struct snd_pcm_substream *substream;
2895 struct snd_pcm_runtime *runtime;
2896 snd_pcm_sframes_t result;
2899 snd_pcm_uframes_t frames;
2901 pcm_file = iocb->ki_filp->private_data;
2902 substream = pcm_file->substream;
2903 snd_assert(substream != NULL, result = -ENXIO; goto end);
2904 runtime = substream->runtime;
2905 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
2909 if (nr_segs > 128 || nr_segs != runtime->channels ||
2910 !frame_aligned(runtime, iov->iov_len)) {
2914 frames = bytes_to_samples(runtime, iov->iov_len);
2915 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2918 for (i = 0; i < nr_segs; ++i)
2919 bufs[i] = iov[i].iov_base;
2920 result = snd_pcm_lib_writev(substream, bufs, frames);
2922 result = frames_to_bytes(runtime, result);
2928 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2930 struct snd_pcm_file *pcm_file;
2931 struct snd_pcm_substream *substream;
2932 struct snd_pcm_runtime *runtime;
2934 snd_pcm_uframes_t avail;
2936 pcm_file = file->private_data;
2938 substream = pcm_file->substream;
2939 snd_assert(substream != NULL, return -ENXIO);
2940 runtime = substream->runtime;
2942 poll_wait(file, &runtime->sleep, wait);
2944 snd_pcm_stream_lock_irq(substream);
2945 avail = snd_pcm_playback_avail(runtime);
2946 switch (runtime->status->state) {
2947 case SNDRV_PCM_STATE_RUNNING:
2948 case SNDRV_PCM_STATE_PREPARED:
2949 case SNDRV_PCM_STATE_PAUSED:
2950 if (avail >= runtime->control->avail_min) {
2951 mask = POLLOUT | POLLWRNORM;
2955 case SNDRV_PCM_STATE_DRAINING:
2959 mask = POLLOUT | POLLWRNORM | POLLERR;
2962 snd_pcm_stream_unlock_irq(substream);
2966 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2968 struct snd_pcm_file *pcm_file;
2969 struct snd_pcm_substream *substream;
2970 struct snd_pcm_runtime *runtime;
2972 snd_pcm_uframes_t avail;
2974 pcm_file = file->private_data;
2976 substream = pcm_file->substream;
2977 snd_assert(substream != NULL, return -ENXIO);
2978 runtime = substream->runtime;
2980 poll_wait(file, &runtime->sleep, wait);
2982 snd_pcm_stream_lock_irq(substream);
2983 avail = snd_pcm_capture_avail(runtime);
2984 switch (runtime->status->state) {
2985 case SNDRV_PCM_STATE_RUNNING:
2986 case SNDRV_PCM_STATE_PREPARED:
2987 case SNDRV_PCM_STATE_PAUSED:
2988 if (avail >= runtime->control->avail_min) {
2989 mask = POLLIN | POLLRDNORM;
2994 case SNDRV_PCM_STATE_DRAINING:
2996 mask = POLLIN | POLLRDNORM;
3001 mask = POLLIN | POLLRDNORM | POLLERR;
3004 snd_pcm_stream_unlock_irq(substream);
3013 * Only on coherent architectures, we can mmap the status and the control records
3014 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3016 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3018 * mmap status record
3020 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3021 struct vm_fault *vmf)
3023 struct snd_pcm_substream *substream = area->vm_private_data;
3024 struct snd_pcm_runtime *runtime;
3026 if (substream == NULL)
3027 return VM_FAULT_SIGBUS;
3028 runtime = substream->runtime;
3029 vmf->page = virt_to_page(runtime->status);
3030 get_page(vmf->page);
3034 static struct vm_operations_struct snd_pcm_vm_ops_status =
3036 .fault = snd_pcm_mmap_status_fault,
3039 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3040 struct vm_area_struct *area)
3042 struct snd_pcm_runtime *runtime;
3044 if (!(area->vm_flags & VM_READ))
3046 runtime = substream->runtime;
3047 snd_assert(runtime != NULL, return -EAGAIN);
3048 size = area->vm_end - area->vm_start;
3049 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3051 area->vm_ops = &snd_pcm_vm_ops_status;
3052 area->vm_private_data = substream;
3053 area->vm_flags |= VM_RESERVED;
3058 * mmap control record
3060 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3061 struct vm_fault *vmf)
3063 struct snd_pcm_substream *substream = area->vm_private_data;
3064 struct snd_pcm_runtime *runtime;
3066 if (substream == NULL)
3067 return VM_FAULT_SIGBUS;
3068 runtime = substream->runtime;
3069 vmf->page = virt_to_page(runtime->control);
3070 get_page(vmf->page);
3074 static struct vm_operations_struct snd_pcm_vm_ops_control =
3076 .fault = snd_pcm_mmap_control_fault,
3079 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3080 struct vm_area_struct *area)
3082 struct snd_pcm_runtime *runtime;
3084 if (!(area->vm_flags & VM_READ))
3086 runtime = substream->runtime;
3087 snd_assert(runtime != NULL, return -EAGAIN);
3088 size = area->vm_end - area->vm_start;
3089 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3091 area->vm_ops = &snd_pcm_vm_ops_control;
3092 area->vm_private_data = substream;
3093 area->vm_flags |= VM_RESERVED;
3096 #else /* ! coherent mmap */
3098 * don't support mmap for status and control records.
3100 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3101 struct vm_area_struct *area)
3105 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3106 struct vm_area_struct *area)
3110 #endif /* coherent mmap */
3113 * fault callback for mmapping a RAM page
3115 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3116 struct vm_fault *vmf)
3118 struct snd_pcm_substream *substream = area->vm_private_data;
3119 struct snd_pcm_runtime *runtime;
3120 unsigned long offset;
3125 if (substream == NULL)
3126 return VM_FAULT_SIGBUS;
3127 runtime = substream->runtime;
3128 offset = vmf->pgoff << PAGE_SHIFT;
3129 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3130 if (offset > dma_bytes - PAGE_SIZE)
3131 return VM_FAULT_SIGBUS;
3132 if (substream->ops->page) {
3133 page = substream->ops->page(substream, offset);
3135 return VM_FAULT_SIGBUS;
3137 vaddr = runtime->dma_area + offset;
3138 page = virt_to_page(vaddr);
3145 static struct vm_operations_struct snd_pcm_vm_ops_data =
3147 .open = snd_pcm_mmap_data_open,
3148 .close = snd_pcm_mmap_data_close,
3149 .fault = snd_pcm_mmap_data_fault,
3153 * mmap the DMA buffer on RAM
3155 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3156 struct vm_area_struct *area)
3158 area->vm_ops = &snd_pcm_vm_ops_data;
3159 area->vm_private_data = substream;
3160 area->vm_flags |= VM_RESERVED;
3161 atomic_inc(&substream->mmap_count);
3166 * mmap the DMA buffer on I/O memory area
3168 #if SNDRV_PCM_INFO_MMAP_IOMEM
3169 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3171 .open = snd_pcm_mmap_data_open,
3172 .close = snd_pcm_mmap_data_close,
3175 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3176 struct vm_area_struct *area)
3179 unsigned long offset;
3181 #ifdef pgprot_noncached
3182 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3184 area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3185 area->vm_private_data = substream;
3186 area->vm_flags |= VM_IO;
3187 size = area->vm_end - area->vm_start;
3188 offset = area->vm_pgoff << PAGE_SHIFT;
3189 if (io_remap_pfn_range(area, area->vm_start,
3190 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3191 size, area->vm_page_prot))
3193 atomic_inc(&substream->mmap_count);
3197 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3198 #endif /* SNDRV_PCM_INFO_MMAP */
3203 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3204 struct vm_area_struct *area)
3206 struct snd_pcm_runtime *runtime;
3208 unsigned long offset;
3211 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3212 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3215 if (!(area->vm_flags & VM_READ))
3218 runtime = substream->runtime;
3219 snd_assert(runtime != NULL, return -EAGAIN);
3220 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3222 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3224 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3225 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3227 size = area->vm_end - area->vm_start;
3228 offset = area->vm_pgoff << PAGE_SHIFT;
3229 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3230 if ((size_t)size > dma_bytes)
3232 if (offset > dma_bytes - size)
3235 if (substream->ops->mmap)
3236 return substream->ops->mmap(substream, area);
3238 return snd_pcm_default_mmap(substream, area);
3241 EXPORT_SYMBOL(snd_pcm_mmap_data);
3243 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3245 struct snd_pcm_file * pcm_file;
3246 struct snd_pcm_substream *substream;
3247 unsigned long offset;
3249 pcm_file = file->private_data;
3250 substream = pcm_file->substream;
3251 snd_assert(substream != NULL, return -ENXIO);
3253 offset = area->vm_pgoff << PAGE_SHIFT;
3255 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3256 if (pcm_file->no_compat_mmap)
3258 return snd_pcm_mmap_status(substream, file, area);
3259 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3260 if (pcm_file->no_compat_mmap)
3262 return snd_pcm_mmap_control(substream, file, area);
3264 return snd_pcm_mmap_data(substream, file, area);
3269 static int snd_pcm_fasync(int fd, struct file * file, int on)
3271 struct snd_pcm_file * pcm_file;
3272 struct snd_pcm_substream *substream;
3273 struct snd_pcm_runtime *runtime;
3276 pcm_file = file->private_data;
3277 substream = pcm_file->substream;
3278 snd_assert(substream != NULL, return -ENXIO);
3279 runtime = substream->runtime;
3281 err = fasync_helper(fd, file, on, &runtime->fasync);
3290 #ifdef CONFIG_COMPAT
3291 #include "pcm_compat.c"
3293 #define snd_pcm_ioctl_compat NULL
3297 * To be removed helpers to keep binary compatibility
3300 #ifdef CONFIG_SND_SUPPORT_OLD_API
3301 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3302 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3304 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3305 struct snd_pcm_hw_params_old *oparams)
3309 memset(params, 0, sizeof(*params));
3310 params->flags = oparams->flags;
3311 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3312 params->masks[i].bits[0] = oparams->masks[i];
3313 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3314 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3315 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3316 params->info = oparams->info;
3317 params->msbits = oparams->msbits;
3318 params->rate_num = oparams->rate_num;
3319 params->rate_den = oparams->rate_den;
3320 params->fifo_size = oparams->fifo_size;
3323 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3324 struct snd_pcm_hw_params *params)
3328 memset(oparams, 0, sizeof(*oparams));
3329 oparams->flags = params->flags;
3330 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3331 oparams->masks[i] = params->masks[i].bits[0];
3332 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3333 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3334 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3335 oparams->info = params->info;
3336 oparams->msbits = params->msbits;
3337 oparams->rate_num = params->rate_num;
3338 oparams->rate_den = params->rate_den;
3339 oparams->fifo_size = params->fifo_size;
3342 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3343 struct snd_pcm_hw_params_old __user * _oparams)
3345 struct snd_pcm_hw_params *params;
3346 struct snd_pcm_hw_params_old *oparams = NULL;
3349 params = kmalloc(sizeof(*params), GFP_KERNEL);
3354 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3360 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3364 snd_pcm_hw_convert_from_old_params(params, oparams);
3365 err = snd_pcm_hw_refine(substream, params);
3366 snd_pcm_hw_convert_to_old_params(oparams, params);
3367 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3377 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3378 struct snd_pcm_hw_params_old __user * _oparams)
3380 struct snd_pcm_hw_params *params;
3381 struct snd_pcm_hw_params_old *oparams = NULL;
3384 params = kmalloc(sizeof(*params), GFP_KERNEL);
3389 oparams = kmalloc(sizeof(*oparams), GFP_KERNEL);
3394 if (copy_from_user(oparams, _oparams, sizeof(*oparams))) {
3398 snd_pcm_hw_convert_from_old_params(params, oparams);
3399 err = snd_pcm_hw_params(substream, params);
3400 snd_pcm_hw_convert_to_old_params(oparams, params);
3401 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3410 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3416 const struct file_operations snd_pcm_f_ops[2] = {
3418 .owner = THIS_MODULE,
3419 .write = snd_pcm_write,
3420 .aio_write = snd_pcm_aio_write,
3421 .open = snd_pcm_playback_open,
3422 .release = snd_pcm_release,
3423 .poll = snd_pcm_playback_poll,
3424 .unlocked_ioctl = snd_pcm_playback_ioctl,
3425 .compat_ioctl = snd_pcm_ioctl_compat,
3426 .mmap = snd_pcm_mmap,
3427 .fasync = snd_pcm_fasync,
3430 .owner = THIS_MODULE,
3431 .read = snd_pcm_read,
3432 .aio_read = snd_pcm_aio_read,
3433 .open = snd_pcm_capture_open,
3434 .release = snd_pcm_release,
3435 .poll = snd_pcm_capture_poll,
3436 .unlocked_ioctl = snd_pcm_capture_ioctl,
3437 .compat_ioctl = snd_pcm_ioctl_compat,
3438 .mmap = snd_pcm_mmap,
3439 .fasync = snd_pcm_fasync,