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/file.h>
24 #include <linux/slab.h>
25 #include <linux/smp_lock.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos_params.h>
28 #include <linux/uio.h>
29 #include <linux/dma-mapping.h>
30 #include <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/info.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/timer.h>
36 #include <sound/minors.h>
43 struct snd_pcm_hw_params_old {
45 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
46 SNDRV_PCM_HW_PARAM_ACCESS + 1];
47 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
48 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
53 unsigned int rate_num;
54 unsigned int rate_den;
55 snd_pcm_uframes_t fifo_size;
56 unsigned char reserved[64];
59 #ifdef CONFIG_SND_SUPPORT_OLD_API
60 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
61 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
63 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
64 struct snd_pcm_hw_params_old __user * _oparams);
65 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
66 struct snd_pcm_hw_params_old __user * _oparams);
68 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
74 DEFINE_RWLOCK(snd_pcm_link_rwlock);
75 EXPORT_SYMBOL(snd_pcm_link_rwlock);
77 static DECLARE_RWSEM(snd_pcm_link_rwsem);
79 static inline mm_segment_t snd_enter_user(void)
81 mm_segment_t fs = get_fs();
86 static inline void snd_leave_user(mm_segment_t fs)
93 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
95 struct snd_pcm_runtime *runtime;
96 struct snd_pcm *pcm = substream->pcm;
97 struct snd_pcm_str *pstr = substream->pstr;
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(KERN_DEBUG "%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(KERN_DEBUG "%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(KERN_DEBUG "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 & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
317 if (!params->fifo_size) {
318 if (snd_mask_min(¶ms->masks[SNDRV_PCM_HW_PARAM_FORMAT]) ==
319 snd_mask_max(¶ms->masks[SNDRV_PCM_HW_PARAM_FORMAT]) &&
320 snd_mask_min(¶ms->masks[SNDRV_PCM_HW_PARAM_CHANNELS]) ==
321 snd_mask_max(¶ms->masks[SNDRV_PCM_HW_PARAM_CHANNELS])) {
322 changed = substream->ops->ioctl(substream,
323 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
332 EXPORT_SYMBOL(snd_pcm_hw_refine);
334 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
335 struct snd_pcm_hw_params __user * _params)
337 struct snd_pcm_hw_params *params;
340 params = memdup_user(_params, sizeof(*params));
342 return PTR_ERR(params);
344 err = snd_pcm_hw_refine(substream, params);
345 if (copy_to_user(_params, params, sizeof(*params))) {
354 static int period_to_usecs(struct snd_pcm_runtime *runtime)
359 return -1; /* invalid */
361 /* take 75% of period time as the deadline */
362 usecs = (750000 / runtime->rate) * runtime->period_size;
363 usecs += ((750000 % runtime->rate) * runtime->period_size) /
369 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
370 struct snd_pcm_hw_params *params)
372 struct snd_pcm_runtime *runtime;
375 snd_pcm_uframes_t frames;
377 if (PCM_RUNTIME_CHECK(substream))
379 runtime = substream->runtime;
380 snd_pcm_stream_lock_irq(substream);
381 switch (runtime->status->state) {
382 case SNDRV_PCM_STATE_OPEN:
383 case SNDRV_PCM_STATE_SETUP:
384 case SNDRV_PCM_STATE_PREPARED:
387 snd_pcm_stream_unlock_irq(substream);
390 snd_pcm_stream_unlock_irq(substream);
391 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
392 if (!substream->oss.oss)
394 if (atomic_read(&substream->mmap_count))
398 err = snd_pcm_hw_refine(substream, params);
402 err = snd_pcm_hw_params_choose(substream, params);
406 if (substream->ops->hw_params != NULL) {
407 err = substream->ops->hw_params(substream, params);
412 runtime->access = params_access(params);
413 runtime->format = params_format(params);
414 runtime->subformat = params_subformat(params);
415 runtime->channels = params_channels(params);
416 runtime->rate = params_rate(params);
417 runtime->period_size = params_period_size(params);
418 runtime->periods = params_periods(params);
419 runtime->buffer_size = params_buffer_size(params);
420 runtime->info = params->info;
421 runtime->rate_num = params->rate_num;
422 runtime->rate_den = params->rate_den;
424 bits = snd_pcm_format_physical_width(runtime->format);
425 runtime->sample_bits = bits;
426 bits *= runtime->channels;
427 runtime->frame_bits = bits;
429 while (bits % 8 != 0) {
433 runtime->byte_align = bits / 8;
434 runtime->min_align = frames;
436 /* Default sw params */
437 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
438 runtime->period_step = 1;
439 runtime->control->avail_min = runtime->period_size;
440 runtime->start_threshold = 1;
441 runtime->stop_threshold = runtime->buffer_size;
442 runtime->silence_threshold = 0;
443 runtime->silence_size = 0;
444 runtime->boundary = runtime->buffer_size;
445 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
446 runtime->boundary *= 2;
448 snd_pcm_timer_resolution_change(substream);
449 runtime->status->state = SNDRV_PCM_STATE_SETUP;
451 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
452 substream->latency_id);
453 if ((usecs = period_to_usecs(runtime)) >= 0)
454 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
455 substream->latency_id, usecs);
458 /* hardware might be unuseable from this time,
459 so we force application to retry to set
460 the correct hardware parameter settings */
461 runtime->status->state = SNDRV_PCM_STATE_OPEN;
462 if (substream->ops->hw_free != NULL)
463 substream->ops->hw_free(substream);
467 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
468 struct snd_pcm_hw_params __user * _params)
470 struct snd_pcm_hw_params *params;
473 params = memdup_user(_params, sizeof(*params));
475 return PTR_ERR(params);
477 err = snd_pcm_hw_params(substream, params);
478 if (copy_to_user(_params, params, sizeof(*params))) {
487 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
489 struct snd_pcm_runtime *runtime;
492 if (PCM_RUNTIME_CHECK(substream))
494 runtime = substream->runtime;
495 snd_pcm_stream_lock_irq(substream);
496 switch (runtime->status->state) {
497 case SNDRV_PCM_STATE_SETUP:
498 case SNDRV_PCM_STATE_PREPARED:
501 snd_pcm_stream_unlock_irq(substream);
504 snd_pcm_stream_unlock_irq(substream);
505 if (atomic_read(&substream->mmap_count))
507 if (substream->ops->hw_free)
508 result = substream->ops->hw_free(substream);
509 runtime->status->state = SNDRV_PCM_STATE_OPEN;
510 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
511 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 if (PCM_RUNTIME_CHECK(substream))
522 runtime = substream->runtime;
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->period_step = params->period_step;
546 runtime->control->avail_min = params->avail_min;
547 runtime->start_threshold = params->start_threshold;
548 runtime->stop_threshold = params->stop_threshold;
549 runtime->silence_threshold = params->silence_threshold;
550 runtime->silence_size = params->silence_size;
551 params->boundary = runtime->boundary;
552 if (snd_pcm_running(substream)) {
553 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
554 runtime->silence_size > 0)
555 snd_pcm_playback_silence(substream, ULONG_MAX);
556 wake_up(&runtime->sleep);
558 snd_pcm_stream_unlock_irq(substream);
562 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
563 struct snd_pcm_sw_params __user * _params)
565 struct snd_pcm_sw_params params;
567 if (copy_from_user(¶ms, _params, sizeof(params)))
569 err = snd_pcm_sw_params(substream, ¶ms);
570 if (copy_to_user(_params, ¶ms, sizeof(params)))
575 int snd_pcm_status(struct snd_pcm_substream *substream,
576 struct snd_pcm_status *status)
578 struct snd_pcm_runtime *runtime = substream->runtime;
580 snd_pcm_stream_lock_irq(substream);
581 status->state = runtime->status->state;
582 status->suspended_state = runtime->status->suspended_state;
583 if (status->state == SNDRV_PCM_STATE_OPEN)
585 status->trigger_tstamp = runtime->trigger_tstamp;
586 if (snd_pcm_running(substream)) {
587 snd_pcm_update_hw_ptr(substream);
588 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
589 status->tstamp = runtime->status->tstamp;
593 snd_pcm_gettime(runtime, &status->tstamp);
595 status->appl_ptr = runtime->control->appl_ptr;
596 status->hw_ptr = runtime->status->hw_ptr;
597 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
598 status->avail = snd_pcm_playback_avail(runtime);
599 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
600 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
601 status->delay = runtime->buffer_size - status->avail;
602 status->delay += runtime->delay;
606 status->avail = snd_pcm_capture_avail(runtime);
607 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
608 status->delay = status->avail + runtime->delay;
612 status->avail_max = runtime->avail_max;
613 status->overrange = runtime->overrange;
614 runtime->avail_max = 0;
615 runtime->overrange = 0;
617 snd_pcm_stream_unlock_irq(substream);
621 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
622 struct snd_pcm_status __user * _status)
624 struct snd_pcm_status status;
627 memset(&status, 0, sizeof(status));
628 res = snd_pcm_status(substream, &status);
631 if (copy_to_user(_status, &status, sizeof(status)))
636 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
637 struct snd_pcm_channel_info * info)
639 struct snd_pcm_runtime *runtime;
640 unsigned int channel;
642 channel = info->channel;
643 runtime = substream->runtime;
644 snd_pcm_stream_lock_irq(substream);
645 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
646 snd_pcm_stream_unlock_irq(substream);
649 snd_pcm_stream_unlock_irq(substream);
650 if (channel >= runtime->channels)
652 memset(info, 0, sizeof(*info));
653 info->channel = channel;
654 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
657 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
658 struct snd_pcm_channel_info __user * _info)
660 struct snd_pcm_channel_info info;
663 if (copy_from_user(&info, _info, sizeof(info)))
665 res = snd_pcm_channel_info(substream, &info);
668 if (copy_to_user(_info, &info, sizeof(info)))
673 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
675 struct snd_pcm_runtime *runtime = substream->runtime;
676 if (runtime->trigger_master == NULL)
678 if (runtime->trigger_master == substream) {
679 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
681 snd_pcm_trigger_tstamp(runtime->trigger_master);
682 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
684 runtime->trigger_master = NULL;
688 int (*pre_action)(struct snd_pcm_substream *substream, int state);
689 int (*do_action)(struct snd_pcm_substream *substream, int state);
690 void (*undo_action)(struct snd_pcm_substream *substream, int state);
691 void (*post_action)(struct snd_pcm_substream *substream, int state);
695 * this functions is core for handling of linked stream
696 * Note: the stream state might be changed also on failure
697 * Note2: call with calling stream lock + link lock
699 static int snd_pcm_action_group(struct action_ops *ops,
700 struct snd_pcm_substream *substream,
701 int state, int do_lock)
703 struct snd_pcm_substream *s = NULL;
704 struct snd_pcm_substream *s1;
707 snd_pcm_group_for_each_entry(s, substream) {
708 if (do_lock && s != substream)
709 spin_lock_nested(&s->self_group.lock,
710 SINGLE_DEPTH_NESTING);
711 res = ops->pre_action(s, state);
715 snd_pcm_group_for_each_entry(s, substream) {
716 res = ops->do_action(s, state);
718 if (ops->undo_action) {
719 snd_pcm_group_for_each_entry(s1, substream) {
720 if (s1 == s) /* failed stream */
722 ops->undo_action(s1, state);
725 s = NULL; /* unlock all */
729 snd_pcm_group_for_each_entry(s, substream) {
730 ops->post_action(s, state);
735 snd_pcm_group_for_each_entry(s1, substream) {
737 spin_unlock(&s1->self_group.lock);
738 if (s1 == s) /* end */
746 * Note: call with stream lock
748 static int snd_pcm_action_single(struct action_ops *ops,
749 struct snd_pcm_substream *substream,
754 res = ops->pre_action(substream, state);
757 res = ops->do_action(substream, state);
759 ops->post_action(substream, state);
760 else if (ops->undo_action)
761 ops->undo_action(substream, state);
766 * Note: call with stream lock
768 static int snd_pcm_action(struct action_ops *ops,
769 struct snd_pcm_substream *substream,
774 if (snd_pcm_stream_linked(substream)) {
775 if (!spin_trylock(&substream->group->lock)) {
776 spin_unlock(&substream->self_group.lock);
777 spin_lock(&substream->group->lock);
778 spin_lock(&substream->self_group.lock);
780 res = snd_pcm_action_group(ops, substream, state, 1);
781 spin_unlock(&substream->group->lock);
783 res = snd_pcm_action_single(ops, substream, state);
789 * Note: don't use any locks before
791 static int snd_pcm_action_lock_irq(struct action_ops *ops,
792 struct snd_pcm_substream *substream,
797 read_lock_irq(&snd_pcm_link_rwlock);
798 if (snd_pcm_stream_linked(substream)) {
799 spin_lock(&substream->group->lock);
800 spin_lock(&substream->self_group.lock);
801 res = snd_pcm_action_group(ops, substream, state, 1);
802 spin_unlock(&substream->self_group.lock);
803 spin_unlock(&substream->group->lock);
805 spin_lock(&substream->self_group.lock);
806 res = snd_pcm_action_single(ops, substream, state);
807 spin_unlock(&substream->self_group.lock);
809 read_unlock_irq(&snd_pcm_link_rwlock);
815 static int snd_pcm_action_nonatomic(struct action_ops *ops,
816 struct snd_pcm_substream *substream,
821 down_read(&snd_pcm_link_rwsem);
822 if (snd_pcm_stream_linked(substream))
823 res = snd_pcm_action_group(ops, substream, state, 0);
825 res = snd_pcm_action_single(ops, substream, state);
826 up_read(&snd_pcm_link_rwsem);
833 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
835 struct snd_pcm_runtime *runtime = substream->runtime;
836 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
838 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
839 !snd_pcm_playback_data(substream))
841 runtime->trigger_master = substream;
845 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
847 if (substream->runtime->trigger_master != substream)
849 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
852 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
854 if (substream->runtime->trigger_master == substream)
855 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
858 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
860 struct snd_pcm_runtime *runtime = substream->runtime;
861 snd_pcm_trigger_tstamp(substream);
862 runtime->hw_ptr_jiffies = jiffies;
863 runtime->status->state = state;
864 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
865 runtime->silence_size > 0)
866 snd_pcm_playback_silence(substream, ULONG_MAX);
867 if (substream->timer)
868 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
869 &runtime->trigger_tstamp);
872 static struct action_ops snd_pcm_action_start = {
873 .pre_action = snd_pcm_pre_start,
874 .do_action = snd_pcm_do_start,
875 .undo_action = snd_pcm_undo_start,
876 .post_action = snd_pcm_post_start
880 * snd_pcm_start - start all linked streams
881 * @substream: the PCM substream instance
883 int snd_pcm_start(struct snd_pcm_substream *substream)
885 return snd_pcm_action(&snd_pcm_action_start, substream,
886 SNDRV_PCM_STATE_RUNNING);
892 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
894 struct snd_pcm_runtime *runtime = substream->runtime;
895 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
897 runtime->trigger_master = substream;
901 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
903 if (substream->runtime->trigger_master == substream &&
904 snd_pcm_running(substream))
905 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
906 return 0; /* unconditonally stop all substreams */
909 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
911 struct snd_pcm_runtime *runtime = substream->runtime;
912 if (runtime->status->state != state) {
913 snd_pcm_trigger_tstamp(substream);
914 if (substream->timer)
915 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
916 &runtime->trigger_tstamp);
917 runtime->status->state = state;
919 wake_up(&runtime->sleep);
922 static struct action_ops snd_pcm_action_stop = {
923 .pre_action = snd_pcm_pre_stop,
924 .do_action = snd_pcm_do_stop,
925 .post_action = snd_pcm_post_stop
929 * snd_pcm_stop - try to stop all running streams in the substream group
930 * @substream: the PCM substream instance
931 * @state: PCM state after stopping the stream
933 * The state of each stream is then changed to the given state unconditionally.
935 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
937 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
940 EXPORT_SYMBOL(snd_pcm_stop);
943 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
944 * @substream: the PCM substream
946 * After stopping, the state is changed to SETUP.
947 * Unlike snd_pcm_stop(), this affects only the given stream.
949 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
951 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
952 SNDRV_PCM_STATE_SETUP);
958 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
960 struct snd_pcm_runtime *runtime = substream->runtime;
961 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
964 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
966 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
968 runtime->trigger_master = substream;
972 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
974 if (substream->runtime->trigger_master != substream)
976 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
977 * a delta betwen the current jiffies, this gives a large enough
978 * delta, effectively to skip the check once.
980 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
981 return substream->ops->trigger(substream,
982 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
983 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
986 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
988 if (substream->runtime->trigger_master == substream)
989 substream->ops->trigger(substream,
990 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
991 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
994 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
996 struct snd_pcm_runtime *runtime = substream->runtime;
997 snd_pcm_trigger_tstamp(substream);
999 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1000 if (substream->timer)
1001 snd_timer_notify(substream->timer,
1002 SNDRV_TIMER_EVENT_MPAUSE,
1003 &runtime->trigger_tstamp);
1004 wake_up(&runtime->sleep);
1006 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1007 if (substream->timer)
1008 snd_timer_notify(substream->timer,
1009 SNDRV_TIMER_EVENT_MCONTINUE,
1010 &runtime->trigger_tstamp);
1014 static struct action_ops snd_pcm_action_pause = {
1015 .pre_action = snd_pcm_pre_pause,
1016 .do_action = snd_pcm_do_pause,
1017 .undo_action = snd_pcm_undo_pause,
1018 .post_action = snd_pcm_post_pause
1022 * Push/release the pause for all linked streams.
1024 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1026 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1032 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1034 struct snd_pcm_runtime *runtime = substream->runtime;
1035 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1037 runtime->trigger_master = substream;
1041 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1043 struct snd_pcm_runtime *runtime = substream->runtime;
1044 if (runtime->trigger_master != substream)
1046 if (! snd_pcm_running(substream))
1048 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1049 return 0; /* suspend unconditionally */
1052 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1054 struct snd_pcm_runtime *runtime = substream->runtime;
1055 snd_pcm_trigger_tstamp(substream);
1056 if (substream->timer)
1057 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1058 &runtime->trigger_tstamp);
1059 runtime->status->suspended_state = runtime->status->state;
1060 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1061 wake_up(&runtime->sleep);
1064 static struct action_ops snd_pcm_action_suspend = {
1065 .pre_action = snd_pcm_pre_suspend,
1066 .do_action = snd_pcm_do_suspend,
1067 .post_action = snd_pcm_post_suspend
1071 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1072 * @substream: the PCM substream
1074 * After this call, all streams are changed to SUSPENDED state.
1076 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1079 unsigned long flags;
1084 snd_pcm_stream_lock_irqsave(substream, flags);
1085 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1086 snd_pcm_stream_unlock_irqrestore(substream, flags);
1090 EXPORT_SYMBOL(snd_pcm_suspend);
1093 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1094 * @pcm: the PCM instance
1096 * After this call, all streams are changed to SUSPENDED state.
1098 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1100 struct snd_pcm_substream *substream;
1101 int stream, err = 0;
1106 for (stream = 0; stream < 2; stream++) {
1107 for (substream = pcm->streams[stream].substream;
1108 substream; substream = substream->next) {
1109 /* FIXME: the open/close code should lock this as well */
1110 if (substream->runtime == NULL)
1112 err = snd_pcm_suspend(substream);
1113 if (err < 0 && err != -EBUSY)
1120 EXPORT_SYMBOL(snd_pcm_suspend_all);
1124 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1126 struct snd_pcm_runtime *runtime = substream->runtime;
1127 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1129 runtime->trigger_master = substream;
1133 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1135 struct snd_pcm_runtime *runtime = substream->runtime;
1136 if (runtime->trigger_master != substream)
1138 /* DMA not running previously? */
1139 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1140 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1141 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1143 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1146 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1148 if (substream->runtime->trigger_master == substream &&
1149 snd_pcm_running(substream))
1150 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1153 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1155 struct snd_pcm_runtime *runtime = substream->runtime;
1156 snd_pcm_trigger_tstamp(substream);
1157 if (substream->timer)
1158 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1159 &runtime->trigger_tstamp);
1160 runtime->status->state = runtime->status->suspended_state;
1163 static struct action_ops snd_pcm_action_resume = {
1164 .pre_action = snd_pcm_pre_resume,
1165 .do_action = snd_pcm_do_resume,
1166 .undo_action = snd_pcm_undo_resume,
1167 .post_action = snd_pcm_post_resume
1170 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1172 struct snd_card *card = substream->pcm->card;
1175 snd_power_lock(card);
1176 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1177 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1178 snd_power_unlock(card);
1184 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1189 #endif /* CONFIG_PM */
1194 * Change the RUNNING stream(s) to XRUN state.
1196 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1198 struct snd_card *card = substream->pcm->card;
1199 struct snd_pcm_runtime *runtime = substream->runtime;
1202 snd_power_lock(card);
1203 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1204 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1209 snd_pcm_stream_lock_irq(substream);
1210 switch (runtime->status->state) {
1211 case SNDRV_PCM_STATE_XRUN:
1212 result = 0; /* already there */
1214 case SNDRV_PCM_STATE_RUNNING:
1215 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1220 snd_pcm_stream_unlock_irq(substream);
1222 snd_power_unlock(card);
1229 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1231 struct snd_pcm_runtime *runtime = substream->runtime;
1232 switch (runtime->status->state) {
1233 case SNDRV_PCM_STATE_RUNNING:
1234 case SNDRV_PCM_STATE_PREPARED:
1235 case SNDRV_PCM_STATE_PAUSED:
1236 case SNDRV_PCM_STATE_SUSPENDED:
1243 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1245 struct snd_pcm_runtime *runtime = substream->runtime;
1246 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1249 runtime->hw_ptr_base = 0;
1250 runtime->silence_start = runtime->status->hw_ptr;
1251 runtime->silence_filled = 0;
1255 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1257 struct snd_pcm_runtime *runtime = substream->runtime;
1258 runtime->control->appl_ptr = runtime->status->hw_ptr;
1259 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1260 runtime->silence_size > 0)
1261 snd_pcm_playback_silence(substream, ULONG_MAX);
1264 static struct action_ops snd_pcm_action_reset = {
1265 .pre_action = snd_pcm_pre_reset,
1266 .do_action = snd_pcm_do_reset,
1267 .post_action = snd_pcm_post_reset
1270 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1272 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1278 /* we use the second argument for updating f_flags */
1279 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1282 struct snd_pcm_runtime *runtime = substream->runtime;
1283 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1284 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1286 if (snd_pcm_running(substream))
1288 substream->f_flags = f_flags;
1292 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1295 err = substream->ops->prepare(substream);
1298 return snd_pcm_do_reset(substream, 0);
1301 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1303 struct snd_pcm_runtime *runtime = substream->runtime;
1304 runtime->control->appl_ptr = runtime->status->hw_ptr;
1305 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1308 static struct action_ops snd_pcm_action_prepare = {
1309 .pre_action = snd_pcm_pre_prepare,
1310 .do_action = snd_pcm_do_prepare,
1311 .post_action = snd_pcm_post_prepare
1315 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1316 * @substream: the PCM substream instance
1317 * @file: file to refer f_flags
1319 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1323 struct snd_card *card = substream->pcm->card;
1327 f_flags = file->f_flags;
1329 f_flags = substream->f_flags;
1331 snd_power_lock(card);
1332 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1333 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1334 substream, f_flags);
1335 snd_power_unlock(card);
1343 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1345 substream->runtime->trigger_master = substream;
1349 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1351 struct snd_pcm_runtime *runtime = substream->runtime;
1352 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1353 switch (runtime->status->state) {
1354 case SNDRV_PCM_STATE_PREPARED:
1355 /* start playback stream if possible */
1356 if (! snd_pcm_playback_empty(substream)) {
1357 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1358 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1361 case SNDRV_PCM_STATE_RUNNING:
1362 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1368 /* stop running stream */
1369 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1370 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1371 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1372 snd_pcm_do_stop(substream, new_state);
1373 snd_pcm_post_stop(substream, new_state);
1379 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1383 static struct action_ops snd_pcm_action_drain_init = {
1384 .pre_action = snd_pcm_pre_drain_init,
1385 .do_action = snd_pcm_do_drain_init,
1386 .post_action = snd_pcm_post_drain_init
1389 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1392 * Drain the stream(s).
1393 * When the substream is linked, sync until the draining of all playback streams
1395 * After this call, all streams are supposed to be either SETUP or DRAINING
1396 * (capture only) state.
1398 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1401 struct snd_card *card;
1402 struct snd_pcm_runtime *runtime;
1403 struct snd_pcm_substream *s;
1408 card = substream->pcm->card;
1409 runtime = substream->runtime;
1411 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1414 snd_power_lock(card);
1415 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1416 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1418 snd_power_unlock(card);
1424 if (file->f_flags & O_NONBLOCK)
1426 } else if (substream->f_flags & O_NONBLOCK)
1429 down_read(&snd_pcm_link_rwsem);
1430 snd_pcm_stream_lock_irq(substream);
1432 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1433 snd_pcm_pause(substream, 0);
1435 /* pre-start/stop - all running streams are changed to DRAINING state */
1436 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1439 /* in non-blocking, we don't wait in ioctl but let caller poll */
1447 struct snd_pcm_runtime *to_check;
1448 if (signal_pending(current)) {
1449 result = -ERESTARTSYS;
1452 /* find a substream to drain */
1454 snd_pcm_group_for_each_entry(s, substream) {
1455 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1457 runtime = s->runtime;
1458 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1464 break; /* all drained */
1465 init_waitqueue_entry(&wait, current);
1466 add_wait_queue(&to_check->sleep, &wait);
1467 set_current_state(TASK_INTERRUPTIBLE);
1468 snd_pcm_stream_unlock_irq(substream);
1469 up_read(&snd_pcm_link_rwsem);
1470 snd_power_unlock(card);
1471 tout = schedule_timeout(10 * HZ);
1472 snd_power_lock(card);
1473 down_read(&snd_pcm_link_rwsem);
1474 snd_pcm_stream_lock_irq(substream);
1475 remove_wait_queue(&to_check->sleep, &wait);
1477 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1480 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1481 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1489 snd_pcm_stream_unlock_irq(substream);
1490 up_read(&snd_pcm_link_rwsem);
1491 snd_power_unlock(card);
1499 * Immediately put all linked substreams into SETUP state.
1501 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1503 struct snd_pcm_runtime *runtime;
1504 struct snd_card *card;
1507 if (PCM_RUNTIME_CHECK(substream))
1509 runtime = substream->runtime;
1510 card = substream->pcm->card;
1512 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1513 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1514 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1517 snd_pcm_stream_lock_irq(substream);
1519 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1520 snd_pcm_pause(substream, 0);
1522 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1523 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1524 snd_pcm_stream_unlock_irq(substream);
1530 /* WARNING: Don't forget to fput back the file */
1531 static struct file *snd_pcm_file_fd(int fd)
1534 struct inode *inode;
1540 inode = file->f_path.dentry->d_inode;
1541 if (!S_ISCHR(inode->i_mode) ||
1542 imajor(inode) != snd_major) {
1546 minor = iminor(inode);
1547 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1548 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1558 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1562 struct snd_pcm_file *pcm_file;
1563 struct snd_pcm_substream *substream1;
1565 file = snd_pcm_file_fd(fd);
1568 pcm_file = file->private_data;
1569 substream1 = pcm_file->substream;
1570 down_write(&snd_pcm_link_rwsem);
1571 write_lock_irq(&snd_pcm_link_rwlock);
1572 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1573 substream->runtime->status->state != substream1->runtime->status->state) {
1577 if (snd_pcm_stream_linked(substream1)) {
1581 if (!snd_pcm_stream_linked(substream)) {
1582 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1583 if (substream->group == NULL) {
1587 spin_lock_init(&substream->group->lock);
1588 INIT_LIST_HEAD(&substream->group->substreams);
1589 list_add_tail(&substream->link_list, &substream->group->substreams);
1590 substream->group->count = 1;
1592 list_add_tail(&substream1->link_list, &substream->group->substreams);
1593 substream->group->count++;
1594 substream1->group = substream->group;
1596 write_unlock_irq(&snd_pcm_link_rwlock);
1597 up_write(&snd_pcm_link_rwsem);
1602 static void relink_to_local(struct snd_pcm_substream *substream)
1604 substream->group = &substream->self_group;
1605 INIT_LIST_HEAD(&substream->self_group.substreams);
1606 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1609 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1611 struct snd_pcm_substream *s;
1614 down_write(&snd_pcm_link_rwsem);
1615 write_lock_irq(&snd_pcm_link_rwlock);
1616 if (!snd_pcm_stream_linked(substream)) {
1620 list_del(&substream->link_list);
1621 substream->group->count--;
1622 if (substream->group->count == 1) { /* detach the last stream, too */
1623 snd_pcm_group_for_each_entry(s, substream) {
1627 kfree(substream->group);
1629 relink_to_local(substream);
1631 write_unlock_irq(&snd_pcm_link_rwlock);
1632 up_write(&snd_pcm_link_rwsem);
1639 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1640 struct snd_pcm_hw_rule *rule)
1642 struct snd_interval t;
1643 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1644 hw_param_interval_c(params, rule->deps[1]), &t);
1645 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1648 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1649 struct snd_pcm_hw_rule *rule)
1651 struct snd_interval t;
1652 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1653 hw_param_interval_c(params, rule->deps[1]), &t);
1654 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1657 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1658 struct snd_pcm_hw_rule *rule)
1660 struct snd_interval t;
1661 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1662 hw_param_interval_c(params, rule->deps[1]),
1663 (unsigned long) rule->private, &t);
1664 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1667 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1668 struct snd_pcm_hw_rule *rule)
1670 struct snd_interval t;
1671 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1672 (unsigned long) rule->private,
1673 hw_param_interval_c(params, rule->deps[1]), &t);
1674 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1677 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1678 struct snd_pcm_hw_rule *rule)
1681 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1683 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1685 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1687 if (! snd_mask_test(mask, k))
1689 bits = snd_pcm_format_physical_width(k);
1691 continue; /* ignore invalid formats */
1692 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1693 snd_mask_reset(&m, k);
1695 return snd_mask_refine(mask, &m);
1698 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1699 struct snd_pcm_hw_rule *rule)
1701 struct snd_interval t;
1707 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1709 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1711 bits = snd_pcm_format_physical_width(k);
1713 continue; /* ignore invalid formats */
1714 if (t.min > (unsigned)bits)
1716 if (t.max < (unsigned)bits)
1720 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1723 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1724 #error "Change this table"
1727 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1728 48000, 64000, 88200, 96000, 176400, 192000 };
1730 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1731 .count = ARRAY_SIZE(rates),
1735 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1736 struct snd_pcm_hw_rule *rule)
1738 struct snd_pcm_hardware *hw = rule->private;
1739 return snd_interval_list(hw_param_interval(params, rule->var),
1740 snd_pcm_known_rates.count,
1741 snd_pcm_known_rates.list, hw->rates);
1744 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1745 struct snd_pcm_hw_rule *rule)
1747 struct snd_interval t;
1748 struct snd_pcm_substream *substream = rule->private;
1750 t.max = substream->buffer_bytes_max;
1754 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1757 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1759 struct snd_pcm_runtime *runtime = substream->runtime;
1760 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1763 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1764 snd_mask_any(constrs_mask(constrs, k));
1767 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1768 snd_interval_any(constrs_interval(constrs, k));
1771 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1772 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1773 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1774 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1775 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1777 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1778 snd_pcm_hw_rule_format, NULL,
1779 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1782 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1783 snd_pcm_hw_rule_sample_bits, NULL,
1784 SNDRV_PCM_HW_PARAM_FORMAT,
1785 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1788 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1789 snd_pcm_hw_rule_div, NULL,
1790 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1793 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1794 snd_pcm_hw_rule_mul, NULL,
1795 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1798 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1799 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1800 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1803 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1804 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1805 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1808 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1809 snd_pcm_hw_rule_div, NULL,
1810 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1813 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1814 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1815 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1818 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1819 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1820 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1823 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1824 snd_pcm_hw_rule_div, NULL,
1825 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1828 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1829 snd_pcm_hw_rule_div, NULL,
1830 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1833 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1834 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1835 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1838 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1839 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1840 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1843 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1844 snd_pcm_hw_rule_mul, NULL,
1845 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1848 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1849 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1850 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1853 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1854 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1855 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1858 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1859 snd_pcm_hw_rule_muldivk, (void*) 8,
1860 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1863 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1864 snd_pcm_hw_rule_muldivk, (void*) 8,
1865 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1868 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1869 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1870 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1873 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1874 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1875 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1881 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1883 struct snd_pcm_runtime *runtime = substream->runtime;
1884 struct snd_pcm_hardware *hw = &runtime->hw;
1886 unsigned int mask = 0;
1888 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1889 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1890 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1891 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1892 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1893 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1894 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1895 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1896 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1897 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1898 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1900 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1904 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1908 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1912 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1913 hw->channels_min, hw->channels_max);
1917 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1918 hw->rate_min, hw->rate_max);
1922 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1923 hw->period_bytes_min, hw->period_bytes_max);
1927 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1928 hw->periods_min, hw->periods_max);
1932 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1933 hw->period_bytes_min, hw->buffer_bytes_max);
1937 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1938 snd_pcm_hw_rule_buffer_bytes_max, substream,
1939 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1944 if (runtime->dma_bytes) {
1945 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1950 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1951 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1952 snd_pcm_hw_rule_rate, hw,
1953 SNDRV_PCM_HW_PARAM_RATE, -1);
1958 /* FIXME: this belong to lowlevel */
1959 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1964 static void pcm_release_private(struct snd_pcm_substream *substream)
1966 snd_pcm_unlink(substream);
1969 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
1971 substream->ref_count--;
1972 if (substream->ref_count > 0)
1975 snd_pcm_drop(substream);
1976 if (substream->hw_opened) {
1977 if (substream->ops->hw_free != NULL)
1978 substream->ops->hw_free(substream);
1979 substream->ops->close(substream);
1980 substream->hw_opened = 0;
1982 if (substream->pcm_release) {
1983 substream->pcm_release(substream);
1984 substream->pcm_release = NULL;
1986 snd_pcm_detach_substream(substream);
1989 EXPORT_SYMBOL(snd_pcm_release_substream);
1991 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
1993 struct snd_pcm_substream **rsubstream)
1995 struct snd_pcm_substream *substream;
1998 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2001 if (substream->ref_count > 1) {
2002 *rsubstream = substream;
2006 err = snd_pcm_hw_constraints_init(substream);
2008 snd_printd("snd_pcm_hw_constraints_init failed\n");
2012 if ((err = substream->ops->open(substream)) < 0)
2015 substream->hw_opened = 1;
2017 err = snd_pcm_hw_constraints_complete(substream);
2019 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2023 *rsubstream = substream;
2027 snd_pcm_release_substream(substream);
2031 EXPORT_SYMBOL(snd_pcm_open_substream);
2033 static int snd_pcm_open_file(struct file *file,
2034 struct snd_pcm *pcm,
2036 struct snd_pcm_file **rpcm_file)
2038 struct snd_pcm_file *pcm_file;
2039 struct snd_pcm_substream *substream;
2040 struct snd_pcm_str *str;
2046 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2050 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2051 if (pcm_file == NULL) {
2052 snd_pcm_release_substream(substream);
2055 pcm_file->substream = substream;
2056 if (substream->ref_count == 1) {
2057 str = substream->pstr;
2058 substream->file = pcm_file;
2059 substream->pcm_release = pcm_release_private;
2061 file->private_data = pcm_file;
2063 *rpcm_file = pcm_file;
2067 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2069 struct snd_pcm *pcm;
2071 pcm = snd_lookup_minor_data(iminor(inode),
2072 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2073 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2076 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2078 struct snd_pcm *pcm;
2080 pcm = snd_lookup_minor_data(iminor(inode),
2081 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2082 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2085 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2088 struct snd_pcm_file *pcm_file;
2095 err = snd_card_file_add(pcm->card, file);
2098 if (!try_module_get(pcm->card->module)) {
2102 init_waitqueue_entry(&wait, current);
2103 add_wait_queue(&pcm->open_wait, &wait);
2104 mutex_lock(&pcm->open_mutex);
2106 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2109 if (err == -EAGAIN) {
2110 if (file->f_flags & O_NONBLOCK) {
2116 set_current_state(TASK_INTERRUPTIBLE);
2117 mutex_unlock(&pcm->open_mutex);
2119 mutex_lock(&pcm->open_mutex);
2120 if (signal_pending(current)) {
2125 remove_wait_queue(&pcm->open_wait, &wait);
2126 mutex_unlock(&pcm->open_mutex);
2132 module_put(pcm->card->module);
2134 snd_card_file_remove(pcm->card, file);
2139 static int snd_pcm_release(struct inode *inode, struct file *file)
2141 struct snd_pcm *pcm;
2142 struct snd_pcm_substream *substream;
2143 struct snd_pcm_file *pcm_file;
2145 pcm_file = file->private_data;
2146 substream = pcm_file->substream;
2147 if (snd_BUG_ON(!substream))
2149 pcm = substream->pcm;
2150 mutex_lock(&pcm->open_mutex);
2151 snd_pcm_release_substream(substream);
2153 mutex_unlock(&pcm->open_mutex);
2154 wake_up(&pcm->open_wait);
2155 module_put(pcm->card->module);
2156 snd_card_file_remove(pcm->card, file);
2160 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2161 snd_pcm_uframes_t frames)
2163 struct snd_pcm_runtime *runtime = substream->runtime;
2164 snd_pcm_sframes_t appl_ptr;
2165 snd_pcm_sframes_t ret;
2166 snd_pcm_sframes_t hw_avail;
2171 snd_pcm_stream_lock_irq(substream);
2172 switch (runtime->status->state) {
2173 case SNDRV_PCM_STATE_PREPARED:
2175 case SNDRV_PCM_STATE_DRAINING:
2176 case SNDRV_PCM_STATE_RUNNING:
2177 if (snd_pcm_update_hw_ptr(substream) >= 0)
2180 case SNDRV_PCM_STATE_XRUN:
2183 case SNDRV_PCM_STATE_SUSPENDED:
2191 hw_avail = snd_pcm_playback_hw_avail(runtime);
2192 if (hw_avail <= 0) {
2196 if (frames > (snd_pcm_uframes_t)hw_avail)
2198 appl_ptr = runtime->control->appl_ptr - frames;
2200 appl_ptr += runtime->boundary;
2201 runtime->control->appl_ptr = appl_ptr;
2204 snd_pcm_stream_unlock_irq(substream);
2208 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2209 snd_pcm_uframes_t frames)
2211 struct snd_pcm_runtime *runtime = substream->runtime;
2212 snd_pcm_sframes_t appl_ptr;
2213 snd_pcm_sframes_t ret;
2214 snd_pcm_sframes_t hw_avail;
2219 snd_pcm_stream_lock_irq(substream);
2220 switch (runtime->status->state) {
2221 case SNDRV_PCM_STATE_PREPARED:
2222 case SNDRV_PCM_STATE_DRAINING:
2224 case SNDRV_PCM_STATE_RUNNING:
2225 if (snd_pcm_update_hw_ptr(substream) >= 0)
2228 case SNDRV_PCM_STATE_XRUN:
2231 case SNDRV_PCM_STATE_SUSPENDED:
2239 hw_avail = snd_pcm_capture_hw_avail(runtime);
2240 if (hw_avail <= 0) {
2244 if (frames > (snd_pcm_uframes_t)hw_avail)
2246 appl_ptr = runtime->control->appl_ptr - frames;
2248 appl_ptr += runtime->boundary;
2249 runtime->control->appl_ptr = appl_ptr;
2252 snd_pcm_stream_unlock_irq(substream);
2256 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2257 snd_pcm_uframes_t frames)
2259 struct snd_pcm_runtime *runtime = substream->runtime;
2260 snd_pcm_sframes_t appl_ptr;
2261 snd_pcm_sframes_t ret;
2262 snd_pcm_sframes_t avail;
2267 snd_pcm_stream_lock_irq(substream);
2268 switch (runtime->status->state) {
2269 case SNDRV_PCM_STATE_PREPARED:
2270 case SNDRV_PCM_STATE_PAUSED:
2272 case SNDRV_PCM_STATE_DRAINING:
2273 case SNDRV_PCM_STATE_RUNNING:
2274 if (snd_pcm_update_hw_ptr(substream) >= 0)
2277 case SNDRV_PCM_STATE_XRUN:
2280 case SNDRV_PCM_STATE_SUSPENDED:
2288 avail = snd_pcm_playback_avail(runtime);
2293 if (frames > (snd_pcm_uframes_t)avail)
2295 appl_ptr = runtime->control->appl_ptr + frames;
2296 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2297 appl_ptr -= runtime->boundary;
2298 runtime->control->appl_ptr = appl_ptr;
2301 snd_pcm_stream_unlock_irq(substream);
2305 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2306 snd_pcm_uframes_t frames)
2308 struct snd_pcm_runtime *runtime = substream->runtime;
2309 snd_pcm_sframes_t appl_ptr;
2310 snd_pcm_sframes_t ret;
2311 snd_pcm_sframes_t avail;
2316 snd_pcm_stream_lock_irq(substream);
2317 switch (runtime->status->state) {
2318 case SNDRV_PCM_STATE_PREPARED:
2319 case SNDRV_PCM_STATE_DRAINING:
2320 case SNDRV_PCM_STATE_PAUSED:
2322 case SNDRV_PCM_STATE_RUNNING:
2323 if (snd_pcm_update_hw_ptr(substream) >= 0)
2326 case SNDRV_PCM_STATE_XRUN:
2329 case SNDRV_PCM_STATE_SUSPENDED:
2337 avail = snd_pcm_capture_avail(runtime);
2342 if (frames > (snd_pcm_uframes_t)avail)
2344 appl_ptr = runtime->control->appl_ptr + frames;
2345 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2346 appl_ptr -= runtime->boundary;
2347 runtime->control->appl_ptr = appl_ptr;
2350 snd_pcm_stream_unlock_irq(substream);
2354 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2356 struct snd_pcm_runtime *runtime = substream->runtime;
2359 snd_pcm_stream_lock_irq(substream);
2360 switch (runtime->status->state) {
2361 case SNDRV_PCM_STATE_DRAINING:
2362 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2364 case SNDRV_PCM_STATE_RUNNING:
2365 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2368 case SNDRV_PCM_STATE_PREPARED:
2369 case SNDRV_PCM_STATE_SUSPENDED:
2372 case SNDRV_PCM_STATE_XRUN:
2380 snd_pcm_stream_unlock_irq(substream);
2384 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2385 snd_pcm_sframes_t __user *res)
2387 struct snd_pcm_runtime *runtime = substream->runtime;
2389 snd_pcm_sframes_t n = 0;
2391 snd_pcm_stream_lock_irq(substream);
2392 switch (runtime->status->state) {
2393 case SNDRV_PCM_STATE_DRAINING:
2394 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2396 case SNDRV_PCM_STATE_RUNNING:
2397 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2400 case SNDRV_PCM_STATE_PREPARED:
2401 case SNDRV_PCM_STATE_SUSPENDED:
2403 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2404 n = snd_pcm_playback_hw_avail(runtime);
2406 n = snd_pcm_capture_avail(runtime);
2407 n += runtime->delay;
2409 case SNDRV_PCM_STATE_XRUN:
2417 snd_pcm_stream_unlock_irq(substream);
2419 if (put_user(n, res))
2424 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2425 struct snd_pcm_sync_ptr __user *_sync_ptr)
2427 struct snd_pcm_runtime *runtime = substream->runtime;
2428 struct snd_pcm_sync_ptr sync_ptr;
2429 volatile struct snd_pcm_mmap_status *status;
2430 volatile struct snd_pcm_mmap_control *control;
2433 memset(&sync_ptr, 0, sizeof(sync_ptr));
2434 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2436 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2438 status = runtime->status;
2439 control = runtime->control;
2440 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2441 err = snd_pcm_hwsync(substream);
2445 snd_pcm_stream_lock_irq(substream);
2446 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2447 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2449 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2450 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2451 control->avail_min = sync_ptr.c.control.avail_min;
2453 sync_ptr.c.control.avail_min = control->avail_min;
2454 sync_ptr.s.status.state = status->state;
2455 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2456 sync_ptr.s.status.tstamp = status->tstamp;
2457 sync_ptr.s.status.suspended_state = status->suspended_state;
2458 snd_pcm_stream_unlock_irq(substream);
2459 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2464 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2466 struct snd_pcm_runtime *runtime = substream->runtime;
2469 if (get_user(arg, _arg))
2471 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2473 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2474 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2475 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2479 static int snd_pcm_common_ioctl1(struct file *file,
2480 struct snd_pcm_substream *substream,
2481 unsigned int cmd, void __user *arg)
2484 case SNDRV_PCM_IOCTL_PVERSION:
2485 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2486 case SNDRV_PCM_IOCTL_INFO:
2487 return snd_pcm_info_user(substream, arg);
2488 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2490 case SNDRV_PCM_IOCTL_TTSTAMP:
2491 return snd_pcm_tstamp(substream, arg);
2492 case SNDRV_PCM_IOCTL_HW_REFINE:
2493 return snd_pcm_hw_refine_user(substream, arg);
2494 case SNDRV_PCM_IOCTL_HW_PARAMS:
2495 return snd_pcm_hw_params_user(substream, arg);
2496 case SNDRV_PCM_IOCTL_HW_FREE:
2497 return snd_pcm_hw_free(substream);
2498 case SNDRV_PCM_IOCTL_SW_PARAMS:
2499 return snd_pcm_sw_params_user(substream, arg);
2500 case SNDRV_PCM_IOCTL_STATUS:
2501 return snd_pcm_status_user(substream, arg);
2502 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2503 return snd_pcm_channel_info_user(substream, arg);
2504 case SNDRV_PCM_IOCTL_PREPARE:
2505 return snd_pcm_prepare(substream, file);
2506 case SNDRV_PCM_IOCTL_RESET:
2507 return snd_pcm_reset(substream);
2508 case SNDRV_PCM_IOCTL_START:
2509 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2510 case SNDRV_PCM_IOCTL_LINK:
2511 return snd_pcm_link(substream, (int)(unsigned long) arg);
2512 case SNDRV_PCM_IOCTL_UNLINK:
2513 return snd_pcm_unlink(substream);
2514 case SNDRV_PCM_IOCTL_RESUME:
2515 return snd_pcm_resume(substream);
2516 case SNDRV_PCM_IOCTL_XRUN:
2517 return snd_pcm_xrun(substream);
2518 case SNDRV_PCM_IOCTL_HWSYNC:
2519 return snd_pcm_hwsync(substream);
2520 case SNDRV_PCM_IOCTL_DELAY:
2521 return snd_pcm_delay(substream, arg);
2522 case SNDRV_PCM_IOCTL_SYNC_PTR:
2523 return snd_pcm_sync_ptr(substream, arg);
2524 #ifdef CONFIG_SND_SUPPORT_OLD_API
2525 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2526 return snd_pcm_hw_refine_old_user(substream, arg);
2527 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2528 return snd_pcm_hw_params_old_user(substream, arg);
2530 case SNDRV_PCM_IOCTL_DRAIN:
2531 return snd_pcm_drain(substream, file);
2532 case SNDRV_PCM_IOCTL_DROP:
2533 return snd_pcm_drop(substream);
2534 case SNDRV_PCM_IOCTL_PAUSE:
2537 snd_pcm_stream_lock_irq(substream);
2538 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2539 snd_pcm_stream_unlock_irq(substream);
2543 snd_printd("unknown ioctl = 0x%x\n", cmd);
2547 static int snd_pcm_playback_ioctl1(struct file *file,
2548 struct snd_pcm_substream *substream,
2549 unsigned int cmd, void __user *arg)
2551 if (snd_BUG_ON(!substream))
2553 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2556 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2558 struct snd_xferi xferi;
2559 struct snd_xferi __user *_xferi = arg;
2560 struct snd_pcm_runtime *runtime = substream->runtime;
2561 snd_pcm_sframes_t result;
2562 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2564 if (put_user(0, &_xferi->result))
2566 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2568 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2569 __put_user(result, &_xferi->result);
2570 return result < 0 ? result : 0;
2572 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2574 struct snd_xfern xfern;
2575 struct snd_xfern __user *_xfern = arg;
2576 struct snd_pcm_runtime *runtime = substream->runtime;
2578 snd_pcm_sframes_t result;
2579 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2581 if (runtime->channels > 128)
2583 if (put_user(0, &_xfern->result))
2585 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2588 bufs = memdup_user(xfern.bufs,
2589 sizeof(void *) * runtime->channels);
2591 return PTR_ERR(bufs);
2592 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2594 __put_user(result, &_xfern->result);
2595 return result < 0 ? result : 0;
2597 case SNDRV_PCM_IOCTL_REWIND:
2599 snd_pcm_uframes_t frames;
2600 snd_pcm_uframes_t __user *_frames = arg;
2601 snd_pcm_sframes_t result;
2602 if (get_user(frames, _frames))
2604 if (put_user(0, _frames))
2606 result = snd_pcm_playback_rewind(substream, frames);
2607 __put_user(result, _frames);
2608 return result < 0 ? result : 0;
2610 case SNDRV_PCM_IOCTL_FORWARD:
2612 snd_pcm_uframes_t frames;
2613 snd_pcm_uframes_t __user *_frames = arg;
2614 snd_pcm_sframes_t result;
2615 if (get_user(frames, _frames))
2617 if (put_user(0, _frames))
2619 result = snd_pcm_playback_forward(substream, frames);
2620 __put_user(result, _frames);
2621 return result < 0 ? result : 0;
2624 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2627 static int snd_pcm_capture_ioctl1(struct file *file,
2628 struct snd_pcm_substream *substream,
2629 unsigned int cmd, void __user *arg)
2631 if (snd_BUG_ON(!substream))
2633 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2636 case SNDRV_PCM_IOCTL_READI_FRAMES:
2638 struct snd_xferi xferi;
2639 struct snd_xferi __user *_xferi = arg;
2640 struct snd_pcm_runtime *runtime = substream->runtime;
2641 snd_pcm_sframes_t result;
2642 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2644 if (put_user(0, &_xferi->result))
2646 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2648 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2649 __put_user(result, &_xferi->result);
2650 return result < 0 ? result : 0;
2652 case SNDRV_PCM_IOCTL_READN_FRAMES:
2654 struct snd_xfern xfern;
2655 struct snd_xfern __user *_xfern = arg;
2656 struct snd_pcm_runtime *runtime = substream->runtime;
2658 snd_pcm_sframes_t result;
2659 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2661 if (runtime->channels > 128)
2663 if (put_user(0, &_xfern->result))
2665 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2668 bufs = memdup_user(xfern.bufs,
2669 sizeof(void *) * runtime->channels);
2671 return PTR_ERR(bufs);
2672 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2674 __put_user(result, &_xfern->result);
2675 return result < 0 ? result : 0;
2677 case SNDRV_PCM_IOCTL_REWIND:
2679 snd_pcm_uframes_t frames;
2680 snd_pcm_uframes_t __user *_frames = arg;
2681 snd_pcm_sframes_t result;
2682 if (get_user(frames, _frames))
2684 if (put_user(0, _frames))
2686 result = snd_pcm_capture_rewind(substream, frames);
2687 __put_user(result, _frames);
2688 return result < 0 ? result : 0;
2690 case SNDRV_PCM_IOCTL_FORWARD:
2692 snd_pcm_uframes_t frames;
2693 snd_pcm_uframes_t __user *_frames = arg;
2694 snd_pcm_sframes_t result;
2695 if (get_user(frames, _frames))
2697 if (put_user(0, _frames))
2699 result = snd_pcm_capture_forward(substream, frames);
2700 __put_user(result, _frames);
2701 return result < 0 ? result : 0;
2704 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2707 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2710 struct snd_pcm_file *pcm_file;
2712 pcm_file = file->private_data;
2714 if (((cmd >> 8) & 0xff) != 'A')
2717 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2718 (void __user *)arg);
2721 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2724 struct snd_pcm_file *pcm_file;
2726 pcm_file = file->private_data;
2728 if (((cmd >> 8) & 0xff) != 'A')
2731 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2732 (void __user *)arg);
2735 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2736 unsigned int cmd, void *arg)
2741 fs = snd_enter_user();
2742 switch (substream->stream) {
2743 case SNDRV_PCM_STREAM_PLAYBACK:
2744 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2745 (void __user *)arg);
2747 case SNDRV_PCM_STREAM_CAPTURE:
2748 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2749 (void __user *)arg);
2759 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2761 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2764 struct snd_pcm_file *pcm_file;
2765 struct snd_pcm_substream *substream;
2766 struct snd_pcm_runtime *runtime;
2767 snd_pcm_sframes_t result;
2769 pcm_file = file->private_data;
2770 substream = pcm_file->substream;
2771 if (PCM_RUNTIME_CHECK(substream))
2773 runtime = substream->runtime;
2774 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2776 if (!frame_aligned(runtime, count))
2778 count = bytes_to_frames(runtime, count);
2779 result = snd_pcm_lib_read(substream, buf, count);
2781 result = frames_to_bytes(runtime, result);
2785 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2786 size_t count, loff_t * offset)
2788 struct snd_pcm_file *pcm_file;
2789 struct snd_pcm_substream *substream;
2790 struct snd_pcm_runtime *runtime;
2791 snd_pcm_sframes_t result;
2793 pcm_file = file->private_data;
2794 substream = pcm_file->substream;
2795 if (PCM_RUNTIME_CHECK(substream))
2797 runtime = substream->runtime;
2798 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2800 if (!frame_aligned(runtime, count))
2802 count = bytes_to_frames(runtime, count);
2803 result = snd_pcm_lib_write(substream, buf, count);
2805 result = frames_to_bytes(runtime, result);
2809 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2810 unsigned long nr_segs, loff_t pos)
2813 struct snd_pcm_file *pcm_file;
2814 struct snd_pcm_substream *substream;
2815 struct snd_pcm_runtime *runtime;
2816 snd_pcm_sframes_t result;
2819 snd_pcm_uframes_t frames;
2821 pcm_file = iocb->ki_filp->private_data;
2822 substream = pcm_file->substream;
2823 if (PCM_RUNTIME_CHECK(substream))
2825 runtime = substream->runtime;
2826 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2828 if (nr_segs > 1024 || nr_segs != runtime->channels)
2830 if (!frame_aligned(runtime, iov->iov_len))
2832 frames = bytes_to_samples(runtime, iov->iov_len);
2833 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2836 for (i = 0; i < nr_segs; ++i)
2837 bufs[i] = iov[i].iov_base;
2838 result = snd_pcm_lib_readv(substream, bufs, frames);
2840 result = frames_to_bytes(runtime, result);
2845 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2846 unsigned long nr_segs, loff_t pos)
2848 struct snd_pcm_file *pcm_file;
2849 struct snd_pcm_substream *substream;
2850 struct snd_pcm_runtime *runtime;
2851 snd_pcm_sframes_t result;
2854 snd_pcm_uframes_t frames;
2856 pcm_file = iocb->ki_filp->private_data;
2857 substream = pcm_file->substream;
2858 if (PCM_RUNTIME_CHECK(substream))
2860 runtime = substream->runtime;
2861 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2863 if (nr_segs > 128 || nr_segs != runtime->channels ||
2864 !frame_aligned(runtime, iov->iov_len))
2866 frames = bytes_to_samples(runtime, iov->iov_len);
2867 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2870 for (i = 0; i < nr_segs; ++i)
2871 bufs[i] = iov[i].iov_base;
2872 result = snd_pcm_lib_writev(substream, bufs, frames);
2874 result = frames_to_bytes(runtime, result);
2879 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2881 struct snd_pcm_file *pcm_file;
2882 struct snd_pcm_substream *substream;
2883 struct snd_pcm_runtime *runtime;
2885 snd_pcm_uframes_t avail;
2887 pcm_file = file->private_data;
2889 substream = pcm_file->substream;
2890 if (PCM_RUNTIME_CHECK(substream))
2892 runtime = substream->runtime;
2894 poll_wait(file, &runtime->sleep, wait);
2896 snd_pcm_stream_lock_irq(substream);
2897 avail = snd_pcm_playback_avail(runtime);
2898 switch (runtime->status->state) {
2899 case SNDRV_PCM_STATE_RUNNING:
2900 case SNDRV_PCM_STATE_PREPARED:
2901 case SNDRV_PCM_STATE_PAUSED:
2902 if (avail >= runtime->control->avail_min) {
2903 mask = POLLOUT | POLLWRNORM;
2907 case SNDRV_PCM_STATE_DRAINING:
2911 mask = POLLOUT | POLLWRNORM | POLLERR;
2914 snd_pcm_stream_unlock_irq(substream);
2918 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2920 struct snd_pcm_file *pcm_file;
2921 struct snd_pcm_substream *substream;
2922 struct snd_pcm_runtime *runtime;
2924 snd_pcm_uframes_t avail;
2926 pcm_file = file->private_data;
2928 substream = pcm_file->substream;
2929 if (PCM_RUNTIME_CHECK(substream))
2931 runtime = substream->runtime;
2933 poll_wait(file, &runtime->sleep, wait);
2935 snd_pcm_stream_lock_irq(substream);
2936 avail = snd_pcm_capture_avail(runtime);
2937 switch (runtime->status->state) {
2938 case SNDRV_PCM_STATE_RUNNING:
2939 case SNDRV_PCM_STATE_PREPARED:
2940 case SNDRV_PCM_STATE_PAUSED:
2941 if (avail >= runtime->control->avail_min) {
2942 mask = POLLIN | POLLRDNORM;
2947 case SNDRV_PCM_STATE_DRAINING:
2949 mask = POLLIN | POLLRDNORM;
2954 mask = POLLIN | POLLRDNORM | POLLERR;
2957 snd_pcm_stream_unlock_irq(substream);
2966 * Only on coherent architectures, we can mmap the status and the control records
2967 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
2969 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2971 * mmap status record
2973 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
2974 struct vm_fault *vmf)
2976 struct snd_pcm_substream *substream = area->vm_private_data;
2977 struct snd_pcm_runtime *runtime;
2979 if (substream == NULL)
2980 return VM_FAULT_SIGBUS;
2981 runtime = substream->runtime;
2982 vmf->page = virt_to_page(runtime->status);
2983 get_page(vmf->page);
2987 static const struct vm_operations_struct snd_pcm_vm_ops_status =
2989 .fault = snd_pcm_mmap_status_fault,
2992 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
2993 struct vm_area_struct *area)
2995 struct snd_pcm_runtime *runtime;
2997 if (!(area->vm_flags & VM_READ))
2999 runtime = substream->runtime;
3000 size = area->vm_end - area->vm_start;
3001 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3003 area->vm_ops = &snd_pcm_vm_ops_status;
3004 area->vm_private_data = substream;
3005 area->vm_flags |= VM_RESERVED;
3010 * mmap control record
3012 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3013 struct vm_fault *vmf)
3015 struct snd_pcm_substream *substream = area->vm_private_data;
3016 struct snd_pcm_runtime *runtime;
3018 if (substream == NULL)
3019 return VM_FAULT_SIGBUS;
3020 runtime = substream->runtime;
3021 vmf->page = virt_to_page(runtime->control);
3022 get_page(vmf->page);
3026 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3028 .fault = snd_pcm_mmap_control_fault,
3031 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3032 struct vm_area_struct *area)
3034 struct snd_pcm_runtime *runtime;
3036 if (!(area->vm_flags & VM_READ))
3038 runtime = substream->runtime;
3039 size = area->vm_end - area->vm_start;
3040 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3042 area->vm_ops = &snd_pcm_vm_ops_control;
3043 area->vm_private_data = substream;
3044 area->vm_flags |= VM_RESERVED;
3047 #else /* ! coherent mmap */
3049 * don't support mmap for status and control records.
3051 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3052 struct vm_area_struct *area)
3056 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3057 struct vm_area_struct *area)
3061 #endif /* coherent mmap */
3063 static inline struct page *
3064 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3066 void *vaddr = substream->runtime->dma_area + ofs;
3067 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3068 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3069 return virt_to_page(CAC_ADDR(vaddr));
3071 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3072 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3073 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3074 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3075 /* assume dma_handle set via pfn_to_phys() in
3076 * mm/dma-noncoherent.c
3078 return pfn_to_page(addr >> PAGE_SHIFT);
3081 return virt_to_page(vaddr);
3085 * fault callback for mmapping a RAM page
3087 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3088 struct vm_fault *vmf)
3090 struct snd_pcm_substream *substream = area->vm_private_data;
3091 struct snd_pcm_runtime *runtime;
3092 unsigned long offset;
3096 if (substream == NULL)
3097 return VM_FAULT_SIGBUS;
3098 runtime = substream->runtime;
3099 offset = vmf->pgoff << PAGE_SHIFT;
3100 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3101 if (offset > dma_bytes - PAGE_SIZE)
3102 return VM_FAULT_SIGBUS;
3103 if (substream->ops->page)
3104 page = substream->ops->page(substream, offset);
3106 page = snd_pcm_default_page_ops(substream, offset);
3108 return VM_FAULT_SIGBUS;
3114 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3115 .open = snd_pcm_mmap_data_open,
3116 .close = snd_pcm_mmap_data_close,
3119 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3120 .open = snd_pcm_mmap_data_open,
3121 .close = snd_pcm_mmap_data_close,
3122 .fault = snd_pcm_mmap_data_fault,
3125 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3126 /* This should be defined / handled globally! */
3128 #define ARCH_HAS_DMA_MMAP_COHERENT
3133 * mmap the DMA buffer on RAM
3135 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3136 struct vm_area_struct *area)
3138 area->vm_flags |= VM_RESERVED;
3139 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3140 if (!substream->ops->page &&
3141 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3142 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3144 substream->runtime->dma_area,
3145 substream->runtime->dma_addr,
3146 area->vm_end - area->vm_start);
3147 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3148 /* mmap with fault handler */
3149 area->vm_ops = &snd_pcm_vm_ops_data_fault;
3154 * mmap the DMA buffer on I/O memory area
3156 #if SNDRV_PCM_INFO_MMAP_IOMEM
3157 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3158 struct vm_area_struct *area)
3161 unsigned long offset;
3163 #ifdef pgprot_noncached
3164 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3166 area->vm_flags |= VM_IO;
3167 size = area->vm_end - area->vm_start;
3168 offset = area->vm_pgoff << PAGE_SHIFT;
3169 if (io_remap_pfn_range(area, area->vm_start,
3170 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3171 size, area->vm_page_prot))
3176 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3177 #endif /* SNDRV_PCM_INFO_MMAP */
3182 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3183 struct vm_area_struct *area)
3185 struct snd_pcm_runtime *runtime;
3187 unsigned long offset;
3191 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3192 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3195 if (!(area->vm_flags & VM_READ))
3198 runtime = substream->runtime;
3199 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3201 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3203 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3204 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3206 size = area->vm_end - area->vm_start;
3207 offset = area->vm_pgoff << PAGE_SHIFT;
3208 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3209 if ((size_t)size > dma_bytes)
3211 if (offset > dma_bytes - size)
3214 area->vm_ops = &snd_pcm_vm_ops_data;
3215 area->vm_private_data = substream;
3216 if (substream->ops->mmap)
3217 err = substream->ops->mmap(substream, area);
3219 err = snd_pcm_default_mmap(substream, area);
3221 atomic_inc(&substream->mmap_count);
3225 EXPORT_SYMBOL(snd_pcm_mmap_data);
3227 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3229 struct snd_pcm_file * pcm_file;
3230 struct snd_pcm_substream *substream;
3231 unsigned long offset;
3233 pcm_file = file->private_data;
3234 substream = pcm_file->substream;
3235 if (PCM_RUNTIME_CHECK(substream))
3238 offset = area->vm_pgoff << PAGE_SHIFT;
3240 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3241 if (pcm_file->no_compat_mmap)
3243 return snd_pcm_mmap_status(substream, file, area);
3244 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3245 if (pcm_file->no_compat_mmap)
3247 return snd_pcm_mmap_control(substream, file, area);
3249 return snd_pcm_mmap_data(substream, file, area);
3254 static int snd_pcm_fasync(int fd, struct file * file, int on)
3256 struct snd_pcm_file * pcm_file;
3257 struct snd_pcm_substream *substream;
3258 struct snd_pcm_runtime *runtime;
3262 pcm_file = file->private_data;
3263 substream = pcm_file->substream;
3264 if (PCM_RUNTIME_CHECK(substream))
3266 runtime = substream->runtime;
3267 err = fasync_helper(fd, file, on, &runtime->fasync);
3276 #ifdef CONFIG_COMPAT
3277 #include "pcm_compat.c"
3279 #define snd_pcm_ioctl_compat NULL
3283 * To be removed helpers to keep binary compatibility
3286 #ifdef CONFIG_SND_SUPPORT_OLD_API
3287 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3288 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3290 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3291 struct snd_pcm_hw_params_old *oparams)
3295 memset(params, 0, sizeof(*params));
3296 params->flags = oparams->flags;
3297 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3298 params->masks[i].bits[0] = oparams->masks[i];
3299 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3300 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3301 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3302 params->info = oparams->info;
3303 params->msbits = oparams->msbits;
3304 params->rate_num = oparams->rate_num;
3305 params->rate_den = oparams->rate_den;
3306 params->fifo_size = oparams->fifo_size;
3309 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3310 struct snd_pcm_hw_params *params)
3314 memset(oparams, 0, sizeof(*oparams));
3315 oparams->flags = params->flags;
3316 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3317 oparams->masks[i] = params->masks[i].bits[0];
3318 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3319 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3320 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3321 oparams->info = params->info;
3322 oparams->msbits = params->msbits;
3323 oparams->rate_num = params->rate_num;
3324 oparams->rate_den = params->rate_den;
3325 oparams->fifo_size = params->fifo_size;
3328 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3329 struct snd_pcm_hw_params_old __user * _oparams)
3331 struct snd_pcm_hw_params *params;
3332 struct snd_pcm_hw_params_old *oparams = NULL;
3335 params = kmalloc(sizeof(*params), GFP_KERNEL);
3339 oparams = memdup_user(_oparams, sizeof(*oparams));
3340 if (IS_ERR(oparams)) {
3341 err = PTR_ERR(oparams);
3344 snd_pcm_hw_convert_from_old_params(params, oparams);
3345 err = snd_pcm_hw_refine(substream, params);
3346 snd_pcm_hw_convert_to_old_params(oparams, params);
3347 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3358 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3359 struct snd_pcm_hw_params_old __user * _oparams)
3361 struct snd_pcm_hw_params *params;
3362 struct snd_pcm_hw_params_old *oparams = NULL;
3365 params = kmalloc(sizeof(*params), GFP_KERNEL);
3369 oparams = memdup_user(_oparams, sizeof(*oparams));
3370 if (IS_ERR(oparams)) {
3371 err = PTR_ERR(oparams);
3374 snd_pcm_hw_convert_from_old_params(params, oparams);
3375 err = snd_pcm_hw_params(substream, params);
3376 snd_pcm_hw_convert_to_old_params(oparams, params);
3377 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3387 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3390 unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr,
3391 unsigned long len, unsigned long pgoff,
3392 unsigned long flags)
3397 # define dummy_get_unmapped_area NULL
3404 const struct file_operations snd_pcm_f_ops[2] = {
3406 .owner = THIS_MODULE,
3407 .write = snd_pcm_write,
3408 .aio_write = snd_pcm_aio_write,
3409 .open = snd_pcm_playback_open,
3410 .release = snd_pcm_release,
3411 .poll = snd_pcm_playback_poll,
3412 .unlocked_ioctl = snd_pcm_playback_ioctl,
3413 .compat_ioctl = snd_pcm_ioctl_compat,
3414 .mmap = snd_pcm_mmap,
3415 .fasync = snd_pcm_fasync,
3416 .get_unmapped_area = dummy_get_unmapped_area,
3419 .owner = THIS_MODULE,
3420 .read = snd_pcm_read,
3421 .aio_read = snd_pcm_aio_read,
3422 .open = snd_pcm_capture_open,
3423 .release = snd_pcm_release,
3424 .poll = snd_pcm_capture_poll,
3425 .unlocked_ioctl = snd_pcm_capture_ioctl,
3426 .compat_ioctl = snd_pcm_ioctl_compat,
3427 .mmap = snd_pcm_mmap,
3428 .fasync = snd_pcm_fasync,
3429 .get_unmapped_area = dummy_get_unmapped_area,