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/time.h>
26 #include <linux/pm_qos.h>
27 #include <linux/uio.h>
28 #include <linux/dma-mapping.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>
37 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
38 #include <dma-coherence.h>
45 struct snd_pcm_hw_params_old {
47 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
48 SNDRV_PCM_HW_PARAM_ACCESS + 1];
49 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
50 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
55 unsigned int rate_num;
56 unsigned int rate_den;
57 snd_pcm_uframes_t fifo_size;
58 unsigned char reserved[64];
61 #ifdef CONFIG_SND_SUPPORT_OLD_API
62 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
63 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
65 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
66 struct snd_pcm_hw_params_old __user * _oparams);
67 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
68 struct snd_pcm_hw_params_old __user * _oparams);
70 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
76 DEFINE_RWLOCK(snd_pcm_link_rwlock);
77 EXPORT_SYMBOL(snd_pcm_link_rwlock);
79 static DECLARE_RWSEM(snd_pcm_link_rwsem);
81 static inline mm_segment_t snd_enter_user(void)
83 mm_segment_t fs = get_fs();
88 static inline void snd_leave_user(mm_segment_t fs)
95 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
97 struct snd_pcm_runtime *runtime;
98 struct snd_pcm *pcm = substream->pcm;
99 struct snd_pcm_str *pstr = substream->pstr;
101 memset(info, 0, sizeof(*info));
102 info->card = pcm->card->number;
103 info->device = pcm->device;
104 info->stream = substream->stream;
105 info->subdevice = substream->number;
106 strlcpy(info->id, pcm->id, sizeof(info->id));
107 strlcpy(info->name, pcm->name, sizeof(info->name));
108 info->dev_class = pcm->dev_class;
109 info->dev_subclass = pcm->dev_subclass;
110 info->subdevices_count = pstr->substream_count;
111 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
112 strlcpy(info->subname, substream->name, sizeof(info->subname));
113 runtime = substream->runtime;
114 /* AB: FIXME!!! This is definitely nonsense */
116 info->sync = runtime->sync;
117 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
122 int snd_pcm_info_user(struct snd_pcm_substream *substream,
123 struct snd_pcm_info __user * _info)
125 struct snd_pcm_info *info;
128 info = kmalloc(sizeof(*info), GFP_KERNEL);
131 err = snd_pcm_info(substream, info);
133 if (copy_to_user(_info, info, sizeof(*info)))
143 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
144 static const char * const snd_pcm_hw_param_names[] = {
148 HW_PARAM(SAMPLE_BITS),
149 HW_PARAM(FRAME_BITS),
152 HW_PARAM(PERIOD_TIME),
153 HW_PARAM(PERIOD_SIZE),
154 HW_PARAM(PERIOD_BYTES),
156 HW_PARAM(BUFFER_TIME),
157 HW_PARAM(BUFFER_SIZE),
158 HW_PARAM(BUFFER_BYTES),
163 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
164 struct snd_pcm_hw_params *params)
167 struct snd_pcm_hardware *hw;
168 struct snd_interval *i = NULL;
169 struct snd_mask *m = NULL;
170 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
171 unsigned int rstamps[constrs->rules_num];
172 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
173 unsigned int stamp = 2;
177 params->fifo_size = 0;
178 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
180 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
181 params->rate_num = 0;
182 params->rate_den = 0;
185 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
186 m = hw_param_mask(params, k);
187 if (snd_mask_empty(m))
189 if (!(params->rmask & (1 << k)))
192 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
193 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
195 changed = snd_mask_refine(m, constrs_mask(constrs, k));
197 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
200 params->cmask |= 1 << k;
205 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
206 i = hw_param_interval(params, k);
207 if (snd_interval_empty(i))
209 if (!(params->rmask & (1 << k)))
212 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
217 i->openmin ? '(' : '[', i->min,
218 i->max, i->openmax ? ')' : ']');
221 changed = snd_interval_refine(i, constrs_interval(constrs, k));
226 printk("%c%u %u%c\n",
227 i->openmin ? '(' : '[', i->min,
228 i->max, i->openmax ? ')' : ']');
231 params->cmask |= 1 << k;
236 for (k = 0; k < constrs->rules_num; k++)
238 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
239 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
242 for (k = 0; k < constrs->rules_num; k++) {
243 struct snd_pcm_hw_rule *r = &constrs->rules[k];
246 if (r->cond && !(r->cond & params->flags))
248 for (d = 0; r->deps[d] >= 0; d++) {
249 if (vstamps[r->deps[d]] > rstamps[k]) {
257 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
259 printk("%s = ", snd_pcm_hw_param_names[r->var]);
260 if (hw_is_mask(r->var)) {
261 m = hw_param_mask(params, r->var);
262 printk("%x", *m->bits);
264 i = hw_param_interval(params, r->var);
269 i->openmin ? '(' : '[', i->min,
270 i->max, i->openmax ? ')' : ']');
274 changed = r->func(params, r);
278 if (hw_is_mask(r->var))
279 printk("%x", *m->bits);
285 i->openmin ? '(' : '[', i->min,
286 i->max, i->openmax ? ')' : ']');
292 if (changed && r->var >= 0) {
293 params->cmask |= (1 << r->var);
294 vstamps[r->var] = stamp;
302 if (!params->msbits) {
303 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
304 if (snd_interval_single(i))
305 params->msbits = snd_interval_value(i);
308 if (!params->rate_den) {
309 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
310 if (snd_interval_single(i)) {
311 params->rate_num = snd_interval_value(i);
312 params->rate_den = 1;
316 hw = &substream->runtime->hw;
318 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
319 if (!params->fifo_size) {
320 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
321 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
322 if (snd_mask_min(m) == snd_mask_max(m) &&
323 snd_interval_min(i) == snd_interval_max(i)) {
324 changed = substream->ops->ioctl(substream,
325 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
334 EXPORT_SYMBOL(snd_pcm_hw_refine);
336 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
337 struct snd_pcm_hw_params __user * _params)
339 struct snd_pcm_hw_params *params;
342 params = memdup_user(_params, sizeof(*params));
344 return PTR_ERR(params);
346 err = snd_pcm_hw_refine(substream, params);
347 if (copy_to_user(_params, params, sizeof(*params))) {
356 static int period_to_usecs(struct snd_pcm_runtime *runtime)
361 return -1; /* invalid */
363 /* take 75% of period time as the deadline */
364 usecs = (750000 / runtime->rate) * runtime->period_size;
365 usecs += ((750000 % runtime->rate) * runtime->period_size) /
371 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
372 struct snd_pcm_hw_params *params)
374 struct snd_pcm_runtime *runtime;
377 snd_pcm_uframes_t frames;
379 if (PCM_RUNTIME_CHECK(substream))
381 runtime = substream->runtime;
382 snd_pcm_stream_lock_irq(substream);
383 switch (runtime->status->state) {
384 case SNDRV_PCM_STATE_OPEN:
385 case SNDRV_PCM_STATE_SETUP:
386 case SNDRV_PCM_STATE_PREPARED:
389 snd_pcm_stream_unlock_irq(substream);
392 snd_pcm_stream_unlock_irq(substream);
393 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
394 if (!substream->oss.oss)
396 if (atomic_read(&substream->mmap_count))
400 err = snd_pcm_hw_refine(substream, params);
404 err = snd_pcm_hw_params_choose(substream, params);
408 if (substream->ops->hw_params != NULL) {
409 err = substream->ops->hw_params(substream, params);
414 runtime->access = params_access(params);
415 runtime->format = params_format(params);
416 runtime->subformat = params_subformat(params);
417 runtime->channels = params_channels(params);
418 runtime->rate = params_rate(params);
419 runtime->period_size = params_period_size(params);
420 runtime->periods = params_periods(params);
421 runtime->buffer_size = params_buffer_size(params);
422 runtime->info = params->info;
423 runtime->rate_num = params->rate_num;
424 runtime->rate_den = params->rate_den;
425 runtime->no_period_wakeup =
426 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
427 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
429 bits = snd_pcm_format_physical_width(runtime->format);
430 runtime->sample_bits = bits;
431 bits *= runtime->channels;
432 runtime->frame_bits = bits;
434 while (bits % 8 != 0) {
438 runtime->byte_align = bits / 8;
439 runtime->min_align = frames;
441 /* Default sw params */
442 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
443 runtime->period_step = 1;
444 runtime->control->avail_min = runtime->period_size;
445 runtime->start_threshold = 1;
446 runtime->stop_threshold = runtime->buffer_size;
447 runtime->silence_threshold = 0;
448 runtime->silence_size = 0;
449 runtime->boundary = runtime->buffer_size;
450 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
451 runtime->boundary *= 2;
453 snd_pcm_timer_resolution_change(substream);
454 runtime->status->state = SNDRV_PCM_STATE_SETUP;
456 if (pm_qos_request_active(&substream->latency_pm_qos_req))
457 pm_qos_remove_request(&substream->latency_pm_qos_req);
458 if ((usecs = period_to_usecs(runtime)) >= 0)
459 pm_qos_add_request(&substream->latency_pm_qos_req,
460 PM_QOS_CPU_DMA_LATENCY, usecs);
463 /* hardware might be unusable from this time,
464 so we force application to retry to set
465 the correct hardware parameter settings */
466 runtime->status->state = SNDRV_PCM_STATE_OPEN;
467 if (substream->ops->hw_free != NULL)
468 substream->ops->hw_free(substream);
472 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
473 struct snd_pcm_hw_params __user * _params)
475 struct snd_pcm_hw_params *params;
478 params = memdup_user(_params, sizeof(*params));
480 return PTR_ERR(params);
482 err = snd_pcm_hw_params(substream, params);
483 if (copy_to_user(_params, params, sizeof(*params))) {
492 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
494 struct snd_pcm_runtime *runtime;
497 if (PCM_RUNTIME_CHECK(substream))
499 runtime = substream->runtime;
500 snd_pcm_stream_lock_irq(substream);
501 switch (runtime->status->state) {
502 case SNDRV_PCM_STATE_SETUP:
503 case SNDRV_PCM_STATE_PREPARED:
506 snd_pcm_stream_unlock_irq(substream);
509 snd_pcm_stream_unlock_irq(substream);
510 if (atomic_read(&substream->mmap_count))
512 if (substream->ops->hw_free)
513 result = substream->ops->hw_free(substream);
514 runtime->status->state = SNDRV_PCM_STATE_OPEN;
515 pm_qos_remove_request(&substream->latency_pm_qos_req);
519 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
520 struct snd_pcm_sw_params *params)
522 struct snd_pcm_runtime *runtime;
525 if (PCM_RUNTIME_CHECK(substream))
527 runtime = substream->runtime;
528 snd_pcm_stream_lock_irq(substream);
529 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
530 snd_pcm_stream_unlock_irq(substream);
533 snd_pcm_stream_unlock_irq(substream);
535 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
537 if (params->avail_min == 0)
539 if (params->silence_size >= runtime->boundary) {
540 if (params->silence_threshold != 0)
543 if (params->silence_size > params->silence_threshold)
545 if (params->silence_threshold > runtime->buffer_size)
549 snd_pcm_stream_lock_irq(substream);
550 runtime->tstamp_mode = params->tstamp_mode;
551 runtime->period_step = params->period_step;
552 runtime->control->avail_min = params->avail_min;
553 runtime->start_threshold = params->start_threshold;
554 runtime->stop_threshold = params->stop_threshold;
555 runtime->silence_threshold = params->silence_threshold;
556 runtime->silence_size = params->silence_size;
557 params->boundary = runtime->boundary;
558 if (snd_pcm_running(substream)) {
559 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
560 runtime->silence_size > 0)
561 snd_pcm_playback_silence(substream, ULONG_MAX);
562 err = snd_pcm_update_state(substream, runtime);
564 snd_pcm_stream_unlock_irq(substream);
568 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
569 struct snd_pcm_sw_params __user * _params)
571 struct snd_pcm_sw_params params;
573 if (copy_from_user(¶ms, _params, sizeof(params)))
575 err = snd_pcm_sw_params(substream, ¶ms);
576 if (copy_to_user(_params, ¶ms, sizeof(params)))
581 int snd_pcm_status(struct snd_pcm_substream *substream,
582 struct snd_pcm_status *status)
584 struct snd_pcm_runtime *runtime = substream->runtime;
586 snd_pcm_stream_lock_irq(substream);
587 status->state = runtime->status->state;
588 status->suspended_state = runtime->status->suspended_state;
589 if (status->state == SNDRV_PCM_STATE_OPEN)
591 status->trigger_tstamp = runtime->trigger_tstamp;
592 if (snd_pcm_running(substream)) {
593 snd_pcm_update_hw_ptr(substream);
594 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
595 status->tstamp = runtime->status->tstamp;
599 snd_pcm_gettime(runtime, &status->tstamp);
601 status->appl_ptr = runtime->control->appl_ptr;
602 status->hw_ptr = runtime->status->hw_ptr;
603 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
604 status->avail = snd_pcm_playback_avail(runtime);
605 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
606 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
607 status->delay = runtime->buffer_size - status->avail;
608 status->delay += runtime->delay;
612 status->avail = snd_pcm_capture_avail(runtime);
613 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
614 status->delay = status->avail + runtime->delay;
618 status->avail_max = runtime->avail_max;
619 status->overrange = runtime->overrange;
620 runtime->avail_max = 0;
621 runtime->overrange = 0;
623 snd_pcm_stream_unlock_irq(substream);
627 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
628 struct snd_pcm_status __user * _status)
630 struct snd_pcm_status status;
633 memset(&status, 0, sizeof(status));
634 res = snd_pcm_status(substream, &status);
637 if (copy_to_user(_status, &status, sizeof(status)))
642 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
643 struct snd_pcm_channel_info * info)
645 struct snd_pcm_runtime *runtime;
646 unsigned int channel;
648 channel = info->channel;
649 runtime = substream->runtime;
650 snd_pcm_stream_lock_irq(substream);
651 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
652 snd_pcm_stream_unlock_irq(substream);
655 snd_pcm_stream_unlock_irq(substream);
656 if (channel >= runtime->channels)
658 memset(info, 0, sizeof(*info));
659 info->channel = channel;
660 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
663 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
664 struct snd_pcm_channel_info __user * _info)
666 struct snd_pcm_channel_info info;
669 if (copy_from_user(&info, _info, sizeof(info)))
671 res = snd_pcm_channel_info(substream, &info);
674 if (copy_to_user(_info, &info, sizeof(info)))
679 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
681 struct snd_pcm_runtime *runtime = substream->runtime;
682 if (runtime->trigger_master == NULL)
684 if (runtime->trigger_master == substream) {
685 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
687 snd_pcm_trigger_tstamp(runtime->trigger_master);
688 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
690 runtime->trigger_master = NULL;
694 int (*pre_action)(struct snd_pcm_substream *substream, int state);
695 int (*do_action)(struct snd_pcm_substream *substream, int state);
696 void (*undo_action)(struct snd_pcm_substream *substream, int state);
697 void (*post_action)(struct snd_pcm_substream *substream, int state);
701 * this functions is core for handling of linked stream
702 * Note: the stream state might be changed also on failure
703 * Note2: call with calling stream lock + link lock
705 static int snd_pcm_action_group(struct action_ops *ops,
706 struct snd_pcm_substream *substream,
707 int state, int do_lock)
709 struct snd_pcm_substream *s = NULL;
710 struct snd_pcm_substream *s1;
713 snd_pcm_group_for_each_entry(s, substream) {
714 if (do_lock && s != substream)
715 spin_lock_nested(&s->self_group.lock,
716 SINGLE_DEPTH_NESTING);
717 res = ops->pre_action(s, state);
721 snd_pcm_group_for_each_entry(s, substream) {
722 res = ops->do_action(s, state);
724 if (ops->undo_action) {
725 snd_pcm_group_for_each_entry(s1, substream) {
726 if (s1 == s) /* failed stream */
728 ops->undo_action(s1, state);
731 s = NULL; /* unlock all */
735 snd_pcm_group_for_each_entry(s, substream) {
736 ops->post_action(s, state);
741 snd_pcm_group_for_each_entry(s1, substream) {
743 spin_unlock(&s1->self_group.lock);
744 if (s1 == s) /* end */
752 * Note: call with stream lock
754 static int snd_pcm_action_single(struct action_ops *ops,
755 struct snd_pcm_substream *substream,
760 res = ops->pre_action(substream, state);
763 res = ops->do_action(substream, state);
765 ops->post_action(substream, state);
766 else if (ops->undo_action)
767 ops->undo_action(substream, state);
772 * Note: call with stream lock
774 static int snd_pcm_action(struct action_ops *ops,
775 struct snd_pcm_substream *substream,
780 if (snd_pcm_stream_linked(substream)) {
781 if (!spin_trylock(&substream->group->lock)) {
782 spin_unlock(&substream->self_group.lock);
783 spin_lock(&substream->group->lock);
784 spin_lock(&substream->self_group.lock);
786 res = snd_pcm_action_group(ops, substream, state, 1);
787 spin_unlock(&substream->group->lock);
789 res = snd_pcm_action_single(ops, substream, state);
795 * Note: don't use any locks before
797 static int snd_pcm_action_lock_irq(struct action_ops *ops,
798 struct snd_pcm_substream *substream,
803 read_lock_irq(&snd_pcm_link_rwlock);
804 if (snd_pcm_stream_linked(substream)) {
805 spin_lock(&substream->group->lock);
806 spin_lock(&substream->self_group.lock);
807 res = snd_pcm_action_group(ops, substream, state, 1);
808 spin_unlock(&substream->self_group.lock);
809 spin_unlock(&substream->group->lock);
811 spin_lock(&substream->self_group.lock);
812 res = snd_pcm_action_single(ops, substream, state);
813 spin_unlock(&substream->self_group.lock);
815 read_unlock_irq(&snd_pcm_link_rwlock);
821 static int snd_pcm_action_nonatomic(struct action_ops *ops,
822 struct snd_pcm_substream *substream,
827 down_read(&snd_pcm_link_rwsem);
828 if (snd_pcm_stream_linked(substream))
829 res = snd_pcm_action_group(ops, substream, state, 0);
831 res = snd_pcm_action_single(ops, substream, state);
832 up_read(&snd_pcm_link_rwsem);
839 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
841 struct snd_pcm_runtime *runtime = substream->runtime;
842 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
844 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
845 !snd_pcm_playback_data(substream))
847 runtime->trigger_master = substream;
851 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
853 if (substream->runtime->trigger_master != substream)
855 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
858 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
860 if (substream->runtime->trigger_master == substream)
861 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
864 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
866 struct snd_pcm_runtime *runtime = substream->runtime;
867 snd_pcm_trigger_tstamp(substream);
868 runtime->hw_ptr_jiffies = jiffies;
869 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
871 runtime->status->state = state;
872 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
873 runtime->silence_size > 0)
874 snd_pcm_playback_silence(substream, ULONG_MAX);
875 if (substream->timer)
876 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
877 &runtime->trigger_tstamp);
880 static struct action_ops snd_pcm_action_start = {
881 .pre_action = snd_pcm_pre_start,
882 .do_action = snd_pcm_do_start,
883 .undo_action = snd_pcm_undo_start,
884 .post_action = snd_pcm_post_start
888 * snd_pcm_start - start all linked streams
889 * @substream: the PCM substream instance
891 int snd_pcm_start(struct snd_pcm_substream *substream)
893 return snd_pcm_action(&snd_pcm_action_start, substream,
894 SNDRV_PCM_STATE_RUNNING);
900 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
902 struct snd_pcm_runtime *runtime = substream->runtime;
903 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
905 runtime->trigger_master = substream;
909 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
911 if (substream->runtime->trigger_master == substream &&
912 snd_pcm_running(substream))
913 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
914 return 0; /* unconditonally stop all substreams */
917 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
919 struct snd_pcm_runtime *runtime = substream->runtime;
920 if (runtime->status->state != state) {
921 snd_pcm_trigger_tstamp(substream);
922 if (substream->timer)
923 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
924 &runtime->trigger_tstamp);
925 runtime->status->state = state;
927 wake_up(&runtime->sleep);
928 wake_up(&runtime->tsleep);
931 static struct action_ops snd_pcm_action_stop = {
932 .pre_action = snd_pcm_pre_stop,
933 .do_action = snd_pcm_do_stop,
934 .post_action = snd_pcm_post_stop
938 * snd_pcm_stop - try to stop all running streams in the substream group
939 * @substream: the PCM substream instance
940 * @state: PCM state after stopping the stream
942 * The state of each stream is then changed to the given state unconditionally.
944 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
946 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
949 EXPORT_SYMBOL(snd_pcm_stop);
952 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
953 * @substream: the PCM substream
955 * After stopping, the state is changed to SETUP.
956 * Unlike snd_pcm_stop(), this affects only the given stream.
958 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
960 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
961 SNDRV_PCM_STATE_SETUP);
967 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
969 struct snd_pcm_runtime *runtime = substream->runtime;
970 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
973 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
975 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
977 runtime->trigger_master = substream;
981 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
983 if (substream->runtime->trigger_master != substream)
985 /* some drivers might use hw_ptr to recover from the pause -
986 update the hw_ptr now */
988 snd_pcm_update_hw_ptr(substream);
989 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
990 * a delta between the current jiffies, this gives a large enough
991 * delta, effectively to skip the check once.
993 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
994 return substream->ops->trigger(substream,
995 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
996 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
999 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1001 if (substream->runtime->trigger_master == substream)
1002 substream->ops->trigger(substream,
1003 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1004 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1007 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1009 struct snd_pcm_runtime *runtime = substream->runtime;
1010 snd_pcm_trigger_tstamp(substream);
1012 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1013 if (substream->timer)
1014 snd_timer_notify(substream->timer,
1015 SNDRV_TIMER_EVENT_MPAUSE,
1016 &runtime->trigger_tstamp);
1017 wake_up(&runtime->sleep);
1018 wake_up(&runtime->tsleep);
1020 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1021 if (substream->timer)
1022 snd_timer_notify(substream->timer,
1023 SNDRV_TIMER_EVENT_MCONTINUE,
1024 &runtime->trigger_tstamp);
1028 static struct action_ops snd_pcm_action_pause = {
1029 .pre_action = snd_pcm_pre_pause,
1030 .do_action = snd_pcm_do_pause,
1031 .undo_action = snd_pcm_undo_pause,
1032 .post_action = snd_pcm_post_pause
1036 * Push/release the pause for all linked streams.
1038 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1040 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1046 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1048 struct snd_pcm_runtime *runtime = substream->runtime;
1049 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1051 runtime->trigger_master = substream;
1055 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1057 struct snd_pcm_runtime *runtime = substream->runtime;
1058 if (runtime->trigger_master != substream)
1060 if (! snd_pcm_running(substream))
1062 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1063 return 0; /* suspend unconditionally */
1066 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1068 struct snd_pcm_runtime *runtime = substream->runtime;
1069 snd_pcm_trigger_tstamp(substream);
1070 if (substream->timer)
1071 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1072 &runtime->trigger_tstamp);
1073 runtime->status->suspended_state = runtime->status->state;
1074 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1075 wake_up(&runtime->sleep);
1076 wake_up(&runtime->tsleep);
1079 static struct action_ops snd_pcm_action_suspend = {
1080 .pre_action = snd_pcm_pre_suspend,
1081 .do_action = snd_pcm_do_suspend,
1082 .post_action = snd_pcm_post_suspend
1086 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1087 * @substream: the PCM substream
1089 * After this call, all streams are changed to SUSPENDED state.
1091 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1094 unsigned long flags;
1099 snd_pcm_stream_lock_irqsave(substream, flags);
1100 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1101 snd_pcm_stream_unlock_irqrestore(substream, flags);
1105 EXPORT_SYMBOL(snd_pcm_suspend);
1108 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1109 * @pcm: the PCM instance
1111 * After this call, all streams are changed to SUSPENDED state.
1113 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1115 struct snd_pcm_substream *substream;
1116 int stream, err = 0;
1121 for (stream = 0; stream < 2; stream++) {
1122 for (substream = pcm->streams[stream].substream;
1123 substream; substream = substream->next) {
1124 /* FIXME: the open/close code should lock this as well */
1125 if (substream->runtime == NULL)
1127 err = snd_pcm_suspend(substream);
1128 if (err < 0 && err != -EBUSY)
1135 EXPORT_SYMBOL(snd_pcm_suspend_all);
1139 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1141 struct snd_pcm_runtime *runtime = substream->runtime;
1142 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1144 runtime->trigger_master = substream;
1148 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1150 struct snd_pcm_runtime *runtime = substream->runtime;
1151 if (runtime->trigger_master != substream)
1153 /* DMA not running previously? */
1154 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1155 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1156 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1158 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1161 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1163 if (substream->runtime->trigger_master == substream &&
1164 snd_pcm_running(substream))
1165 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1168 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1170 struct snd_pcm_runtime *runtime = substream->runtime;
1171 snd_pcm_trigger_tstamp(substream);
1172 if (substream->timer)
1173 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1174 &runtime->trigger_tstamp);
1175 runtime->status->state = runtime->status->suspended_state;
1178 static struct action_ops snd_pcm_action_resume = {
1179 .pre_action = snd_pcm_pre_resume,
1180 .do_action = snd_pcm_do_resume,
1181 .undo_action = snd_pcm_undo_resume,
1182 .post_action = snd_pcm_post_resume
1185 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1187 struct snd_card *card = substream->pcm->card;
1190 snd_power_lock(card);
1191 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1192 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1193 snd_power_unlock(card);
1199 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1204 #endif /* CONFIG_PM */
1209 * Change the RUNNING stream(s) to XRUN state.
1211 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1213 struct snd_card *card = substream->pcm->card;
1214 struct snd_pcm_runtime *runtime = substream->runtime;
1217 snd_power_lock(card);
1218 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1219 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1224 snd_pcm_stream_lock_irq(substream);
1225 switch (runtime->status->state) {
1226 case SNDRV_PCM_STATE_XRUN:
1227 result = 0; /* already there */
1229 case SNDRV_PCM_STATE_RUNNING:
1230 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1235 snd_pcm_stream_unlock_irq(substream);
1237 snd_power_unlock(card);
1244 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1246 struct snd_pcm_runtime *runtime = substream->runtime;
1247 switch (runtime->status->state) {
1248 case SNDRV_PCM_STATE_RUNNING:
1249 case SNDRV_PCM_STATE_PREPARED:
1250 case SNDRV_PCM_STATE_PAUSED:
1251 case SNDRV_PCM_STATE_SUSPENDED:
1258 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1260 struct snd_pcm_runtime *runtime = substream->runtime;
1261 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1264 runtime->hw_ptr_base = 0;
1265 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1266 runtime->status->hw_ptr % runtime->period_size;
1267 runtime->silence_start = runtime->status->hw_ptr;
1268 runtime->silence_filled = 0;
1272 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1274 struct snd_pcm_runtime *runtime = substream->runtime;
1275 runtime->control->appl_ptr = runtime->status->hw_ptr;
1276 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1277 runtime->silence_size > 0)
1278 snd_pcm_playback_silence(substream, ULONG_MAX);
1281 static struct action_ops snd_pcm_action_reset = {
1282 .pre_action = snd_pcm_pre_reset,
1283 .do_action = snd_pcm_do_reset,
1284 .post_action = snd_pcm_post_reset
1287 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1289 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1295 /* we use the second argument for updating f_flags */
1296 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1299 struct snd_pcm_runtime *runtime = substream->runtime;
1300 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1301 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1303 if (snd_pcm_running(substream))
1305 substream->f_flags = f_flags;
1309 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1312 err = substream->ops->prepare(substream);
1315 return snd_pcm_do_reset(substream, 0);
1318 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1320 struct snd_pcm_runtime *runtime = substream->runtime;
1321 runtime->control->appl_ptr = runtime->status->hw_ptr;
1322 runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1325 static struct action_ops snd_pcm_action_prepare = {
1326 .pre_action = snd_pcm_pre_prepare,
1327 .do_action = snd_pcm_do_prepare,
1328 .post_action = snd_pcm_post_prepare
1332 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1333 * @substream: the PCM substream instance
1334 * @file: file to refer f_flags
1336 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1340 struct snd_card *card = substream->pcm->card;
1344 f_flags = file->f_flags;
1346 f_flags = substream->f_flags;
1348 snd_power_lock(card);
1349 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1350 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1351 substream, f_flags);
1352 snd_power_unlock(card);
1360 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1362 substream->runtime->trigger_master = substream;
1366 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1368 struct snd_pcm_runtime *runtime = substream->runtime;
1369 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1370 switch (runtime->status->state) {
1371 case SNDRV_PCM_STATE_PREPARED:
1372 /* start playback stream if possible */
1373 if (! snd_pcm_playback_empty(substream)) {
1374 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1375 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1378 case SNDRV_PCM_STATE_RUNNING:
1379 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1385 /* stop running stream */
1386 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1387 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1388 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1389 snd_pcm_do_stop(substream, new_state);
1390 snd_pcm_post_stop(substream, new_state);
1396 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1400 static struct action_ops snd_pcm_action_drain_init = {
1401 .pre_action = snd_pcm_pre_drain_init,
1402 .do_action = snd_pcm_do_drain_init,
1403 .post_action = snd_pcm_post_drain_init
1406 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1409 * Drain the stream(s).
1410 * When the substream is linked, sync until the draining of all playback streams
1412 * After this call, all streams are supposed to be either SETUP or DRAINING
1413 * (capture only) state.
1415 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1418 struct snd_card *card;
1419 struct snd_pcm_runtime *runtime;
1420 struct snd_pcm_substream *s;
1425 card = substream->pcm->card;
1426 runtime = substream->runtime;
1428 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1431 snd_power_lock(card);
1432 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1433 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1435 snd_power_unlock(card);
1441 if (file->f_flags & O_NONBLOCK)
1443 } else if (substream->f_flags & O_NONBLOCK)
1446 down_read(&snd_pcm_link_rwsem);
1447 snd_pcm_stream_lock_irq(substream);
1449 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1450 snd_pcm_pause(substream, 0);
1452 /* pre-start/stop - all running streams are changed to DRAINING state */
1453 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1456 /* in non-blocking, we don't wait in ioctl but let caller poll */
1464 struct snd_pcm_runtime *to_check;
1465 if (signal_pending(current)) {
1466 result = -ERESTARTSYS;
1469 /* find a substream to drain */
1471 snd_pcm_group_for_each_entry(s, substream) {
1472 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1474 runtime = s->runtime;
1475 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1481 break; /* all drained */
1482 init_waitqueue_entry(&wait, current);
1483 add_wait_queue(&to_check->sleep, &wait);
1484 snd_pcm_stream_unlock_irq(substream);
1485 up_read(&snd_pcm_link_rwsem);
1486 snd_power_unlock(card);
1487 if (runtime->no_period_wakeup)
1488 tout = MAX_SCHEDULE_TIMEOUT;
1491 if (runtime->rate) {
1492 long t = runtime->period_size * 2 / runtime->rate;
1493 tout = max(t, tout);
1495 tout = msecs_to_jiffies(tout * 1000);
1497 tout = schedule_timeout_interruptible(tout);
1498 snd_power_lock(card);
1499 down_read(&snd_pcm_link_rwsem);
1500 snd_pcm_stream_lock_irq(substream);
1501 remove_wait_queue(&to_check->sleep, &wait);
1503 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1506 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1507 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1515 snd_pcm_stream_unlock_irq(substream);
1516 up_read(&snd_pcm_link_rwsem);
1517 snd_power_unlock(card);
1525 * Immediately put all linked substreams into SETUP state.
1527 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1529 struct snd_pcm_runtime *runtime;
1532 if (PCM_RUNTIME_CHECK(substream))
1534 runtime = substream->runtime;
1536 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1537 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1538 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1541 snd_pcm_stream_lock_irq(substream);
1543 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1544 snd_pcm_pause(substream, 0);
1546 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1547 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1548 snd_pcm_stream_unlock_irq(substream);
1554 /* WARNING: Don't forget to fput back the file */
1555 static struct file *snd_pcm_file_fd(int fd)
1558 struct inode *inode;
1564 inode = file->f_path.dentry->d_inode;
1565 if (!S_ISCHR(inode->i_mode) ||
1566 imajor(inode) != snd_major) {
1570 minor = iminor(inode);
1571 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1572 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1582 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1586 struct snd_pcm_file *pcm_file;
1587 struct snd_pcm_substream *substream1;
1589 file = snd_pcm_file_fd(fd);
1592 pcm_file = file->private_data;
1593 substream1 = pcm_file->substream;
1594 down_write(&snd_pcm_link_rwsem);
1595 write_lock_irq(&snd_pcm_link_rwlock);
1596 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1597 substream->runtime->status->state != substream1->runtime->status->state) {
1601 if (snd_pcm_stream_linked(substream1)) {
1605 if (!snd_pcm_stream_linked(substream)) {
1606 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1607 if (substream->group == NULL) {
1611 spin_lock_init(&substream->group->lock);
1612 INIT_LIST_HEAD(&substream->group->substreams);
1613 list_add_tail(&substream->link_list, &substream->group->substreams);
1614 substream->group->count = 1;
1616 list_add_tail(&substream1->link_list, &substream->group->substreams);
1617 substream->group->count++;
1618 substream1->group = substream->group;
1620 write_unlock_irq(&snd_pcm_link_rwlock);
1621 up_write(&snd_pcm_link_rwsem);
1626 static void relink_to_local(struct snd_pcm_substream *substream)
1628 substream->group = &substream->self_group;
1629 INIT_LIST_HEAD(&substream->self_group.substreams);
1630 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1633 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1635 struct snd_pcm_substream *s;
1638 down_write(&snd_pcm_link_rwsem);
1639 write_lock_irq(&snd_pcm_link_rwlock);
1640 if (!snd_pcm_stream_linked(substream)) {
1644 list_del(&substream->link_list);
1645 substream->group->count--;
1646 if (substream->group->count == 1) { /* detach the last stream, too */
1647 snd_pcm_group_for_each_entry(s, substream) {
1651 kfree(substream->group);
1653 relink_to_local(substream);
1655 write_unlock_irq(&snd_pcm_link_rwlock);
1656 up_write(&snd_pcm_link_rwsem);
1663 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1664 struct snd_pcm_hw_rule *rule)
1666 struct snd_interval t;
1667 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1668 hw_param_interval_c(params, rule->deps[1]), &t);
1669 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1672 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1673 struct snd_pcm_hw_rule *rule)
1675 struct snd_interval t;
1676 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1677 hw_param_interval_c(params, rule->deps[1]), &t);
1678 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1681 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1682 struct snd_pcm_hw_rule *rule)
1684 struct snd_interval t;
1685 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1686 hw_param_interval_c(params, rule->deps[1]),
1687 (unsigned long) rule->private, &t);
1688 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1691 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1692 struct snd_pcm_hw_rule *rule)
1694 struct snd_interval t;
1695 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1696 (unsigned long) rule->private,
1697 hw_param_interval_c(params, rule->deps[1]), &t);
1698 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1701 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1702 struct snd_pcm_hw_rule *rule)
1705 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1707 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1709 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1711 if (! snd_mask_test(mask, k))
1713 bits = snd_pcm_format_physical_width(k);
1715 continue; /* ignore invalid formats */
1716 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1717 snd_mask_reset(&m, k);
1719 return snd_mask_refine(mask, &m);
1722 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1723 struct snd_pcm_hw_rule *rule)
1725 struct snd_interval t;
1731 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1733 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1735 bits = snd_pcm_format_physical_width(k);
1737 continue; /* ignore invalid formats */
1738 if (t.min > (unsigned)bits)
1740 if (t.max < (unsigned)bits)
1744 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1747 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1748 #error "Change this table"
1751 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1752 48000, 64000, 88200, 96000, 176400, 192000 };
1754 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1755 .count = ARRAY_SIZE(rates),
1759 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1760 struct snd_pcm_hw_rule *rule)
1762 struct snd_pcm_hardware *hw = rule->private;
1763 return snd_interval_list(hw_param_interval(params, rule->var),
1764 snd_pcm_known_rates.count,
1765 snd_pcm_known_rates.list, hw->rates);
1768 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1769 struct snd_pcm_hw_rule *rule)
1771 struct snd_interval t;
1772 struct snd_pcm_substream *substream = rule->private;
1774 t.max = substream->buffer_bytes_max;
1778 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1781 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1783 struct snd_pcm_runtime *runtime = substream->runtime;
1784 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1787 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1788 snd_mask_any(constrs_mask(constrs, k));
1791 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1792 snd_interval_any(constrs_interval(constrs, k));
1795 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1796 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1797 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1798 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1799 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1801 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1802 snd_pcm_hw_rule_format, NULL,
1803 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1806 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1807 snd_pcm_hw_rule_sample_bits, NULL,
1808 SNDRV_PCM_HW_PARAM_FORMAT,
1809 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1812 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1813 snd_pcm_hw_rule_div, NULL,
1814 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1817 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1818 snd_pcm_hw_rule_mul, NULL,
1819 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1822 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1823 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1824 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1827 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1828 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1829 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1832 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1833 snd_pcm_hw_rule_div, NULL,
1834 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1837 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1838 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1839 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1842 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1843 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1844 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1847 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1848 snd_pcm_hw_rule_div, NULL,
1849 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1852 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1853 snd_pcm_hw_rule_div, NULL,
1854 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1857 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1858 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1859 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1862 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1863 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1864 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1867 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1868 snd_pcm_hw_rule_mul, NULL,
1869 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1872 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1873 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1874 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1877 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1878 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1879 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1882 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1883 snd_pcm_hw_rule_muldivk, (void*) 8,
1884 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1887 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1888 snd_pcm_hw_rule_muldivk, (void*) 8,
1889 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1892 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1893 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1894 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1897 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1898 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1899 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1905 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1907 struct snd_pcm_runtime *runtime = substream->runtime;
1908 struct snd_pcm_hardware *hw = &runtime->hw;
1910 unsigned int mask = 0;
1912 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1913 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1914 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1915 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1916 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1917 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1918 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1919 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1920 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1921 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1922 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1924 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1928 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1932 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1936 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1937 hw->channels_min, hw->channels_max);
1941 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1942 hw->rate_min, hw->rate_max);
1946 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1947 hw->period_bytes_min, hw->period_bytes_max);
1951 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1952 hw->periods_min, hw->periods_max);
1956 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1957 hw->period_bytes_min, hw->buffer_bytes_max);
1961 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1962 snd_pcm_hw_rule_buffer_bytes_max, substream,
1963 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1968 if (runtime->dma_bytes) {
1969 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1974 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1975 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1976 snd_pcm_hw_rule_rate, hw,
1977 SNDRV_PCM_HW_PARAM_RATE, -1);
1982 /* FIXME: this belong to lowlevel */
1983 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1988 static void pcm_release_private(struct snd_pcm_substream *substream)
1990 snd_pcm_unlink(substream);
1993 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
1995 substream->ref_count--;
1996 if (substream->ref_count > 0)
1999 snd_pcm_drop(substream);
2000 if (substream->hw_opened) {
2001 if (substream->ops->hw_free != NULL)
2002 substream->ops->hw_free(substream);
2003 substream->ops->close(substream);
2004 substream->hw_opened = 0;
2006 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2007 pm_qos_remove_request(&substream->latency_pm_qos_req);
2008 if (substream->pcm_release) {
2009 substream->pcm_release(substream);
2010 substream->pcm_release = NULL;
2012 snd_pcm_detach_substream(substream);
2015 EXPORT_SYMBOL(snd_pcm_release_substream);
2017 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2019 struct snd_pcm_substream **rsubstream)
2021 struct snd_pcm_substream *substream;
2024 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2027 if (substream->ref_count > 1) {
2028 *rsubstream = substream;
2032 err = snd_pcm_hw_constraints_init(substream);
2034 snd_printd("snd_pcm_hw_constraints_init failed\n");
2038 if ((err = substream->ops->open(substream)) < 0)
2041 substream->hw_opened = 1;
2043 err = snd_pcm_hw_constraints_complete(substream);
2045 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2049 *rsubstream = substream;
2053 snd_pcm_release_substream(substream);
2057 EXPORT_SYMBOL(snd_pcm_open_substream);
2059 static int snd_pcm_open_file(struct file *file,
2060 struct snd_pcm *pcm,
2063 struct snd_pcm_file *pcm_file;
2064 struct snd_pcm_substream *substream;
2067 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2071 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2072 if (pcm_file == NULL) {
2073 snd_pcm_release_substream(substream);
2076 pcm_file->substream = substream;
2077 if (substream->ref_count == 1) {
2078 substream->file = pcm_file;
2079 substream->pcm_release = pcm_release_private;
2081 file->private_data = pcm_file;
2086 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2088 struct snd_pcm *pcm;
2089 int err = nonseekable_open(inode, file);
2092 pcm = snd_lookup_minor_data(iminor(inode),
2093 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2094 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2097 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2099 struct snd_pcm *pcm;
2100 int err = nonseekable_open(inode, file);
2103 pcm = snd_lookup_minor_data(iminor(inode),
2104 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2105 return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2108 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2117 err = snd_card_file_add(pcm->card, file);
2120 if (!try_module_get(pcm->card->module)) {
2124 init_waitqueue_entry(&wait, current);
2125 add_wait_queue(&pcm->open_wait, &wait);
2126 mutex_lock(&pcm->open_mutex);
2128 err = snd_pcm_open_file(file, pcm, stream);
2131 if (err == -EAGAIN) {
2132 if (file->f_flags & O_NONBLOCK) {
2138 set_current_state(TASK_INTERRUPTIBLE);
2139 mutex_unlock(&pcm->open_mutex);
2141 mutex_lock(&pcm->open_mutex);
2142 if (signal_pending(current)) {
2147 remove_wait_queue(&pcm->open_wait, &wait);
2148 mutex_unlock(&pcm->open_mutex);
2154 module_put(pcm->card->module);
2156 snd_card_file_remove(pcm->card, file);
2161 static int snd_pcm_release(struct inode *inode, struct file *file)
2163 struct snd_pcm *pcm;
2164 struct snd_pcm_substream *substream;
2165 struct snd_pcm_file *pcm_file;
2167 pcm_file = file->private_data;
2168 substream = pcm_file->substream;
2169 if (snd_BUG_ON(!substream))
2171 pcm = substream->pcm;
2172 mutex_lock(&pcm->open_mutex);
2173 snd_pcm_release_substream(substream);
2175 mutex_unlock(&pcm->open_mutex);
2176 wake_up(&pcm->open_wait);
2177 module_put(pcm->card->module);
2178 snd_card_file_remove(pcm->card, file);
2182 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2183 snd_pcm_uframes_t frames)
2185 struct snd_pcm_runtime *runtime = substream->runtime;
2186 snd_pcm_sframes_t appl_ptr;
2187 snd_pcm_sframes_t ret;
2188 snd_pcm_sframes_t hw_avail;
2193 snd_pcm_stream_lock_irq(substream);
2194 switch (runtime->status->state) {
2195 case SNDRV_PCM_STATE_PREPARED:
2197 case SNDRV_PCM_STATE_DRAINING:
2198 case SNDRV_PCM_STATE_RUNNING:
2199 if (snd_pcm_update_hw_ptr(substream) >= 0)
2202 case SNDRV_PCM_STATE_XRUN:
2205 case SNDRV_PCM_STATE_SUSPENDED:
2213 hw_avail = snd_pcm_playback_hw_avail(runtime);
2214 if (hw_avail <= 0) {
2218 if (frames > (snd_pcm_uframes_t)hw_avail)
2220 appl_ptr = runtime->control->appl_ptr - frames;
2222 appl_ptr += runtime->boundary;
2223 runtime->control->appl_ptr = appl_ptr;
2226 snd_pcm_stream_unlock_irq(substream);
2230 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2231 snd_pcm_uframes_t frames)
2233 struct snd_pcm_runtime *runtime = substream->runtime;
2234 snd_pcm_sframes_t appl_ptr;
2235 snd_pcm_sframes_t ret;
2236 snd_pcm_sframes_t hw_avail;
2241 snd_pcm_stream_lock_irq(substream);
2242 switch (runtime->status->state) {
2243 case SNDRV_PCM_STATE_PREPARED:
2244 case SNDRV_PCM_STATE_DRAINING:
2246 case SNDRV_PCM_STATE_RUNNING:
2247 if (snd_pcm_update_hw_ptr(substream) >= 0)
2250 case SNDRV_PCM_STATE_XRUN:
2253 case SNDRV_PCM_STATE_SUSPENDED:
2261 hw_avail = snd_pcm_capture_hw_avail(runtime);
2262 if (hw_avail <= 0) {
2266 if (frames > (snd_pcm_uframes_t)hw_avail)
2268 appl_ptr = runtime->control->appl_ptr - frames;
2270 appl_ptr += runtime->boundary;
2271 runtime->control->appl_ptr = appl_ptr;
2274 snd_pcm_stream_unlock_irq(substream);
2278 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2279 snd_pcm_uframes_t frames)
2281 struct snd_pcm_runtime *runtime = substream->runtime;
2282 snd_pcm_sframes_t appl_ptr;
2283 snd_pcm_sframes_t ret;
2284 snd_pcm_sframes_t avail;
2289 snd_pcm_stream_lock_irq(substream);
2290 switch (runtime->status->state) {
2291 case SNDRV_PCM_STATE_PREPARED:
2292 case SNDRV_PCM_STATE_PAUSED:
2294 case SNDRV_PCM_STATE_DRAINING:
2295 case SNDRV_PCM_STATE_RUNNING:
2296 if (snd_pcm_update_hw_ptr(substream) >= 0)
2299 case SNDRV_PCM_STATE_XRUN:
2302 case SNDRV_PCM_STATE_SUSPENDED:
2310 avail = snd_pcm_playback_avail(runtime);
2315 if (frames > (snd_pcm_uframes_t)avail)
2317 appl_ptr = runtime->control->appl_ptr + frames;
2318 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2319 appl_ptr -= runtime->boundary;
2320 runtime->control->appl_ptr = appl_ptr;
2323 snd_pcm_stream_unlock_irq(substream);
2327 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2328 snd_pcm_uframes_t frames)
2330 struct snd_pcm_runtime *runtime = substream->runtime;
2331 snd_pcm_sframes_t appl_ptr;
2332 snd_pcm_sframes_t ret;
2333 snd_pcm_sframes_t avail;
2338 snd_pcm_stream_lock_irq(substream);
2339 switch (runtime->status->state) {
2340 case SNDRV_PCM_STATE_PREPARED:
2341 case SNDRV_PCM_STATE_DRAINING:
2342 case SNDRV_PCM_STATE_PAUSED:
2344 case SNDRV_PCM_STATE_RUNNING:
2345 if (snd_pcm_update_hw_ptr(substream) >= 0)
2348 case SNDRV_PCM_STATE_XRUN:
2351 case SNDRV_PCM_STATE_SUSPENDED:
2359 avail = snd_pcm_capture_avail(runtime);
2364 if (frames > (snd_pcm_uframes_t)avail)
2366 appl_ptr = runtime->control->appl_ptr + frames;
2367 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2368 appl_ptr -= runtime->boundary;
2369 runtime->control->appl_ptr = appl_ptr;
2372 snd_pcm_stream_unlock_irq(substream);
2376 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2378 struct snd_pcm_runtime *runtime = substream->runtime;
2381 snd_pcm_stream_lock_irq(substream);
2382 switch (runtime->status->state) {
2383 case SNDRV_PCM_STATE_DRAINING:
2384 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2386 case SNDRV_PCM_STATE_RUNNING:
2387 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2390 case SNDRV_PCM_STATE_PREPARED:
2391 case SNDRV_PCM_STATE_SUSPENDED:
2394 case SNDRV_PCM_STATE_XRUN:
2402 snd_pcm_stream_unlock_irq(substream);
2406 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2407 snd_pcm_sframes_t __user *res)
2409 struct snd_pcm_runtime *runtime = substream->runtime;
2411 snd_pcm_sframes_t n = 0;
2413 snd_pcm_stream_lock_irq(substream);
2414 switch (runtime->status->state) {
2415 case SNDRV_PCM_STATE_DRAINING:
2416 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2418 case SNDRV_PCM_STATE_RUNNING:
2419 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2422 case SNDRV_PCM_STATE_PREPARED:
2423 case SNDRV_PCM_STATE_SUSPENDED:
2425 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2426 n = snd_pcm_playback_hw_avail(runtime);
2428 n = snd_pcm_capture_avail(runtime);
2429 n += runtime->delay;
2431 case SNDRV_PCM_STATE_XRUN:
2439 snd_pcm_stream_unlock_irq(substream);
2441 if (put_user(n, res))
2446 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2447 struct snd_pcm_sync_ptr __user *_sync_ptr)
2449 struct snd_pcm_runtime *runtime = substream->runtime;
2450 struct snd_pcm_sync_ptr sync_ptr;
2451 volatile struct snd_pcm_mmap_status *status;
2452 volatile struct snd_pcm_mmap_control *control;
2455 memset(&sync_ptr, 0, sizeof(sync_ptr));
2456 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2458 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2460 status = runtime->status;
2461 control = runtime->control;
2462 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2463 err = snd_pcm_hwsync(substream);
2467 snd_pcm_stream_lock_irq(substream);
2468 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2469 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2471 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2472 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2473 control->avail_min = sync_ptr.c.control.avail_min;
2475 sync_ptr.c.control.avail_min = control->avail_min;
2476 sync_ptr.s.status.state = status->state;
2477 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2478 sync_ptr.s.status.tstamp = status->tstamp;
2479 sync_ptr.s.status.suspended_state = status->suspended_state;
2480 snd_pcm_stream_unlock_irq(substream);
2481 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2486 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2488 struct snd_pcm_runtime *runtime = substream->runtime;
2491 if (get_user(arg, _arg))
2493 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2495 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2496 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2497 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2501 static int snd_pcm_common_ioctl1(struct file *file,
2502 struct snd_pcm_substream *substream,
2503 unsigned int cmd, void __user *arg)
2506 case SNDRV_PCM_IOCTL_PVERSION:
2507 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2508 case SNDRV_PCM_IOCTL_INFO:
2509 return snd_pcm_info_user(substream, arg);
2510 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2512 case SNDRV_PCM_IOCTL_TTSTAMP:
2513 return snd_pcm_tstamp(substream, arg);
2514 case SNDRV_PCM_IOCTL_HW_REFINE:
2515 return snd_pcm_hw_refine_user(substream, arg);
2516 case SNDRV_PCM_IOCTL_HW_PARAMS:
2517 return snd_pcm_hw_params_user(substream, arg);
2518 case SNDRV_PCM_IOCTL_HW_FREE:
2519 return snd_pcm_hw_free(substream);
2520 case SNDRV_PCM_IOCTL_SW_PARAMS:
2521 return snd_pcm_sw_params_user(substream, arg);
2522 case SNDRV_PCM_IOCTL_STATUS:
2523 return snd_pcm_status_user(substream, arg);
2524 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2525 return snd_pcm_channel_info_user(substream, arg);
2526 case SNDRV_PCM_IOCTL_PREPARE:
2527 return snd_pcm_prepare(substream, file);
2528 case SNDRV_PCM_IOCTL_RESET:
2529 return snd_pcm_reset(substream);
2530 case SNDRV_PCM_IOCTL_START:
2531 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2532 case SNDRV_PCM_IOCTL_LINK:
2533 return snd_pcm_link(substream, (int)(unsigned long) arg);
2534 case SNDRV_PCM_IOCTL_UNLINK:
2535 return snd_pcm_unlink(substream);
2536 case SNDRV_PCM_IOCTL_RESUME:
2537 return snd_pcm_resume(substream);
2538 case SNDRV_PCM_IOCTL_XRUN:
2539 return snd_pcm_xrun(substream);
2540 case SNDRV_PCM_IOCTL_HWSYNC:
2541 return snd_pcm_hwsync(substream);
2542 case SNDRV_PCM_IOCTL_DELAY:
2543 return snd_pcm_delay(substream, arg);
2544 case SNDRV_PCM_IOCTL_SYNC_PTR:
2545 return snd_pcm_sync_ptr(substream, arg);
2546 #ifdef CONFIG_SND_SUPPORT_OLD_API
2547 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2548 return snd_pcm_hw_refine_old_user(substream, arg);
2549 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2550 return snd_pcm_hw_params_old_user(substream, arg);
2552 case SNDRV_PCM_IOCTL_DRAIN:
2553 return snd_pcm_drain(substream, file);
2554 case SNDRV_PCM_IOCTL_DROP:
2555 return snd_pcm_drop(substream);
2556 case SNDRV_PCM_IOCTL_PAUSE:
2559 snd_pcm_stream_lock_irq(substream);
2560 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2561 snd_pcm_stream_unlock_irq(substream);
2565 snd_printd("unknown ioctl = 0x%x\n", cmd);
2569 static int snd_pcm_playback_ioctl1(struct file *file,
2570 struct snd_pcm_substream *substream,
2571 unsigned int cmd, void __user *arg)
2573 if (snd_BUG_ON(!substream))
2575 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2578 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2580 struct snd_xferi xferi;
2581 struct snd_xferi __user *_xferi = arg;
2582 struct snd_pcm_runtime *runtime = substream->runtime;
2583 snd_pcm_sframes_t result;
2584 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2586 if (put_user(0, &_xferi->result))
2588 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2590 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2591 __put_user(result, &_xferi->result);
2592 return result < 0 ? result : 0;
2594 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2596 struct snd_xfern xfern;
2597 struct snd_xfern __user *_xfern = arg;
2598 struct snd_pcm_runtime *runtime = substream->runtime;
2600 snd_pcm_sframes_t result;
2601 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2603 if (runtime->channels > 128)
2605 if (put_user(0, &_xfern->result))
2607 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2610 bufs = memdup_user(xfern.bufs,
2611 sizeof(void *) * runtime->channels);
2613 return PTR_ERR(bufs);
2614 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2616 __put_user(result, &_xfern->result);
2617 return result < 0 ? result : 0;
2619 case SNDRV_PCM_IOCTL_REWIND:
2621 snd_pcm_uframes_t frames;
2622 snd_pcm_uframes_t __user *_frames = arg;
2623 snd_pcm_sframes_t result;
2624 if (get_user(frames, _frames))
2626 if (put_user(0, _frames))
2628 result = snd_pcm_playback_rewind(substream, frames);
2629 __put_user(result, _frames);
2630 return result < 0 ? result : 0;
2632 case SNDRV_PCM_IOCTL_FORWARD:
2634 snd_pcm_uframes_t frames;
2635 snd_pcm_uframes_t __user *_frames = arg;
2636 snd_pcm_sframes_t result;
2637 if (get_user(frames, _frames))
2639 if (put_user(0, _frames))
2641 result = snd_pcm_playback_forward(substream, frames);
2642 __put_user(result, _frames);
2643 return result < 0 ? result : 0;
2646 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2649 static int snd_pcm_capture_ioctl1(struct file *file,
2650 struct snd_pcm_substream *substream,
2651 unsigned int cmd, void __user *arg)
2653 if (snd_BUG_ON(!substream))
2655 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2658 case SNDRV_PCM_IOCTL_READI_FRAMES:
2660 struct snd_xferi xferi;
2661 struct snd_xferi __user *_xferi = arg;
2662 struct snd_pcm_runtime *runtime = substream->runtime;
2663 snd_pcm_sframes_t result;
2664 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2666 if (put_user(0, &_xferi->result))
2668 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2670 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2671 __put_user(result, &_xferi->result);
2672 return result < 0 ? result : 0;
2674 case SNDRV_PCM_IOCTL_READN_FRAMES:
2676 struct snd_xfern xfern;
2677 struct snd_xfern __user *_xfern = arg;
2678 struct snd_pcm_runtime *runtime = substream->runtime;
2680 snd_pcm_sframes_t result;
2681 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2683 if (runtime->channels > 128)
2685 if (put_user(0, &_xfern->result))
2687 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2690 bufs = memdup_user(xfern.bufs,
2691 sizeof(void *) * runtime->channels);
2693 return PTR_ERR(bufs);
2694 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2696 __put_user(result, &_xfern->result);
2697 return result < 0 ? result : 0;
2699 case SNDRV_PCM_IOCTL_REWIND:
2701 snd_pcm_uframes_t frames;
2702 snd_pcm_uframes_t __user *_frames = arg;
2703 snd_pcm_sframes_t result;
2704 if (get_user(frames, _frames))
2706 if (put_user(0, _frames))
2708 result = snd_pcm_capture_rewind(substream, frames);
2709 __put_user(result, _frames);
2710 return result < 0 ? result : 0;
2712 case SNDRV_PCM_IOCTL_FORWARD:
2714 snd_pcm_uframes_t frames;
2715 snd_pcm_uframes_t __user *_frames = arg;
2716 snd_pcm_sframes_t result;
2717 if (get_user(frames, _frames))
2719 if (put_user(0, _frames))
2721 result = snd_pcm_capture_forward(substream, frames);
2722 __put_user(result, _frames);
2723 return result < 0 ? result : 0;
2726 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2729 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2732 struct snd_pcm_file *pcm_file;
2734 pcm_file = file->private_data;
2736 if (((cmd >> 8) & 0xff) != 'A')
2739 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2740 (void __user *)arg);
2743 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2746 struct snd_pcm_file *pcm_file;
2748 pcm_file = file->private_data;
2750 if (((cmd >> 8) & 0xff) != 'A')
2753 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2754 (void __user *)arg);
2757 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2758 unsigned int cmd, void *arg)
2763 fs = snd_enter_user();
2764 switch (substream->stream) {
2765 case SNDRV_PCM_STREAM_PLAYBACK:
2766 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2767 (void __user *)arg);
2769 case SNDRV_PCM_STREAM_CAPTURE:
2770 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2771 (void __user *)arg);
2781 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2783 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2786 struct snd_pcm_file *pcm_file;
2787 struct snd_pcm_substream *substream;
2788 struct snd_pcm_runtime *runtime;
2789 snd_pcm_sframes_t result;
2791 pcm_file = file->private_data;
2792 substream = pcm_file->substream;
2793 if (PCM_RUNTIME_CHECK(substream))
2795 runtime = substream->runtime;
2796 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2798 if (!frame_aligned(runtime, count))
2800 count = bytes_to_frames(runtime, count);
2801 result = snd_pcm_lib_read(substream, buf, count);
2803 result = frames_to_bytes(runtime, result);
2807 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2808 size_t count, loff_t * offset)
2810 struct snd_pcm_file *pcm_file;
2811 struct snd_pcm_substream *substream;
2812 struct snd_pcm_runtime *runtime;
2813 snd_pcm_sframes_t result;
2815 pcm_file = file->private_data;
2816 substream = pcm_file->substream;
2817 if (PCM_RUNTIME_CHECK(substream))
2819 runtime = substream->runtime;
2820 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2822 if (!frame_aligned(runtime, count))
2824 count = bytes_to_frames(runtime, count);
2825 result = snd_pcm_lib_write(substream, buf, count);
2827 result = frames_to_bytes(runtime, result);
2831 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2832 unsigned long nr_segs, loff_t pos)
2835 struct snd_pcm_file *pcm_file;
2836 struct snd_pcm_substream *substream;
2837 struct snd_pcm_runtime *runtime;
2838 snd_pcm_sframes_t result;
2841 snd_pcm_uframes_t frames;
2843 pcm_file = iocb->ki_filp->private_data;
2844 substream = pcm_file->substream;
2845 if (PCM_RUNTIME_CHECK(substream))
2847 runtime = substream->runtime;
2848 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2850 if (nr_segs > 1024 || nr_segs != runtime->channels)
2852 if (!frame_aligned(runtime, iov->iov_len))
2854 frames = bytes_to_samples(runtime, iov->iov_len);
2855 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2858 for (i = 0; i < nr_segs; ++i)
2859 bufs[i] = iov[i].iov_base;
2860 result = snd_pcm_lib_readv(substream, bufs, frames);
2862 result = frames_to_bytes(runtime, result);
2867 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2868 unsigned long nr_segs, loff_t pos)
2870 struct snd_pcm_file *pcm_file;
2871 struct snd_pcm_substream *substream;
2872 struct snd_pcm_runtime *runtime;
2873 snd_pcm_sframes_t result;
2876 snd_pcm_uframes_t frames;
2878 pcm_file = iocb->ki_filp->private_data;
2879 substream = pcm_file->substream;
2880 if (PCM_RUNTIME_CHECK(substream))
2882 runtime = substream->runtime;
2883 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2885 if (nr_segs > 128 || nr_segs != runtime->channels ||
2886 !frame_aligned(runtime, iov->iov_len))
2888 frames = bytes_to_samples(runtime, iov->iov_len);
2889 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2892 for (i = 0; i < nr_segs; ++i)
2893 bufs[i] = iov[i].iov_base;
2894 result = snd_pcm_lib_writev(substream, bufs, frames);
2896 result = frames_to_bytes(runtime, result);
2901 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2903 struct snd_pcm_file *pcm_file;
2904 struct snd_pcm_substream *substream;
2905 struct snd_pcm_runtime *runtime;
2907 snd_pcm_uframes_t avail;
2909 pcm_file = file->private_data;
2911 substream = pcm_file->substream;
2912 if (PCM_RUNTIME_CHECK(substream))
2914 runtime = substream->runtime;
2916 poll_wait(file, &runtime->sleep, wait);
2918 snd_pcm_stream_lock_irq(substream);
2919 avail = snd_pcm_playback_avail(runtime);
2920 switch (runtime->status->state) {
2921 case SNDRV_PCM_STATE_RUNNING:
2922 case SNDRV_PCM_STATE_PREPARED:
2923 case SNDRV_PCM_STATE_PAUSED:
2924 if (avail >= runtime->control->avail_min) {
2925 mask = POLLOUT | POLLWRNORM;
2929 case SNDRV_PCM_STATE_DRAINING:
2933 mask = POLLOUT | POLLWRNORM | POLLERR;
2936 snd_pcm_stream_unlock_irq(substream);
2940 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2942 struct snd_pcm_file *pcm_file;
2943 struct snd_pcm_substream *substream;
2944 struct snd_pcm_runtime *runtime;
2946 snd_pcm_uframes_t avail;
2948 pcm_file = file->private_data;
2950 substream = pcm_file->substream;
2951 if (PCM_RUNTIME_CHECK(substream))
2953 runtime = substream->runtime;
2955 poll_wait(file, &runtime->sleep, wait);
2957 snd_pcm_stream_lock_irq(substream);
2958 avail = snd_pcm_capture_avail(runtime);
2959 switch (runtime->status->state) {
2960 case SNDRV_PCM_STATE_RUNNING:
2961 case SNDRV_PCM_STATE_PREPARED:
2962 case SNDRV_PCM_STATE_PAUSED:
2963 if (avail >= runtime->control->avail_min) {
2964 mask = POLLIN | POLLRDNORM;
2969 case SNDRV_PCM_STATE_DRAINING:
2971 mask = POLLIN | POLLRDNORM;
2976 mask = POLLIN | POLLRDNORM | POLLERR;
2979 snd_pcm_stream_unlock_irq(substream);
2988 * Only on coherent architectures, we can mmap the status and the control records
2989 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
2991 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2993 * mmap status record
2995 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
2996 struct vm_fault *vmf)
2998 struct snd_pcm_substream *substream = area->vm_private_data;
2999 struct snd_pcm_runtime *runtime;
3001 if (substream == NULL)
3002 return VM_FAULT_SIGBUS;
3003 runtime = substream->runtime;
3004 vmf->page = virt_to_page(runtime->status);
3005 get_page(vmf->page);
3009 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3011 .fault = snd_pcm_mmap_status_fault,
3014 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3015 struct vm_area_struct *area)
3018 if (!(area->vm_flags & VM_READ))
3020 size = area->vm_end - area->vm_start;
3021 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3023 area->vm_ops = &snd_pcm_vm_ops_status;
3024 area->vm_private_data = substream;
3025 area->vm_flags |= VM_RESERVED;
3030 * mmap control record
3032 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3033 struct vm_fault *vmf)
3035 struct snd_pcm_substream *substream = area->vm_private_data;
3036 struct snd_pcm_runtime *runtime;
3038 if (substream == NULL)
3039 return VM_FAULT_SIGBUS;
3040 runtime = substream->runtime;
3041 vmf->page = virt_to_page(runtime->control);
3042 get_page(vmf->page);
3046 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3048 .fault = snd_pcm_mmap_control_fault,
3051 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3052 struct vm_area_struct *area)
3055 if (!(area->vm_flags & VM_READ))
3057 size = area->vm_end - area->vm_start;
3058 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3060 area->vm_ops = &snd_pcm_vm_ops_control;
3061 area->vm_private_data = substream;
3062 area->vm_flags |= VM_RESERVED;
3065 #else /* ! coherent mmap */
3067 * don't support mmap for status and control records.
3069 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3070 struct vm_area_struct *area)
3074 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3075 struct vm_area_struct *area)
3079 #endif /* coherent mmap */
3081 static inline struct page *
3082 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3084 void *vaddr = substream->runtime->dma_area + ofs;
3085 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3086 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3087 return virt_to_page(CAC_ADDR(vaddr));
3089 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3090 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3091 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3092 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3093 /* assume dma_handle set via pfn_to_phys() in
3094 * mm/dma-noncoherent.c
3096 return pfn_to_page(addr >> PAGE_SHIFT);
3099 return virt_to_page(vaddr);
3103 * fault callback for mmapping a RAM page
3105 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3106 struct vm_fault *vmf)
3108 struct snd_pcm_substream *substream = area->vm_private_data;
3109 struct snd_pcm_runtime *runtime;
3110 unsigned long offset;
3114 if (substream == NULL)
3115 return VM_FAULT_SIGBUS;
3116 runtime = substream->runtime;
3117 offset = vmf->pgoff << PAGE_SHIFT;
3118 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3119 if (offset > dma_bytes - PAGE_SIZE)
3120 return VM_FAULT_SIGBUS;
3121 if (substream->ops->page)
3122 page = substream->ops->page(substream, offset);
3124 page = snd_pcm_default_page_ops(substream, offset);
3126 return VM_FAULT_SIGBUS;
3132 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3133 .open = snd_pcm_mmap_data_open,
3134 .close = snd_pcm_mmap_data_close,
3137 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3138 .open = snd_pcm_mmap_data_open,
3139 .close = snd_pcm_mmap_data_close,
3140 .fault = snd_pcm_mmap_data_fault,
3143 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3144 /* This should be defined / handled globally! */
3146 #define ARCH_HAS_DMA_MMAP_COHERENT
3151 * mmap the DMA buffer on RAM
3153 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3154 struct vm_area_struct *area)
3156 area->vm_flags |= VM_RESERVED;
3157 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3158 if (!substream->ops->page &&
3159 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3160 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3162 substream->runtime->dma_area,
3163 substream->runtime->dma_addr,
3164 area->vm_end - area->vm_start);
3165 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3166 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3167 !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3168 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3169 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3170 /* mmap with fault handler */
3171 area->vm_ops = &snd_pcm_vm_ops_data_fault;
3174 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3177 * mmap the DMA buffer on I/O memory area
3179 #if SNDRV_PCM_INFO_MMAP_IOMEM
3180 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3181 struct vm_area_struct *area)
3184 unsigned long offset;
3186 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3187 area->vm_flags |= VM_IO;
3188 size = area->vm_end - area->vm_start;
3189 offset = area->vm_pgoff << PAGE_SHIFT;
3190 if (io_remap_pfn_range(area, area->vm_start,
3191 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3192 size, area->vm_page_prot))
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;
3212 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3213 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3216 if (!(area->vm_flags & VM_READ))
3219 runtime = substream->runtime;
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 area->vm_ops = &snd_pcm_vm_ops_data;
3236 area->vm_private_data = substream;
3237 if (substream->ops->mmap)
3238 err = substream->ops->mmap(substream, area);
3240 err = snd_pcm_lib_default_mmap(substream, area);
3242 atomic_inc(&substream->mmap_count);
3246 EXPORT_SYMBOL(snd_pcm_mmap_data);
3248 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3250 struct snd_pcm_file * pcm_file;
3251 struct snd_pcm_substream *substream;
3252 unsigned long offset;
3254 pcm_file = file->private_data;
3255 substream = pcm_file->substream;
3256 if (PCM_RUNTIME_CHECK(substream))
3259 offset = area->vm_pgoff << PAGE_SHIFT;
3261 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3262 if (pcm_file->no_compat_mmap)
3264 return snd_pcm_mmap_status(substream, file, area);
3265 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3266 if (pcm_file->no_compat_mmap)
3268 return snd_pcm_mmap_control(substream, file, area);
3270 return snd_pcm_mmap_data(substream, file, area);
3275 static int snd_pcm_fasync(int fd, struct file * file, int on)
3277 struct snd_pcm_file * pcm_file;
3278 struct snd_pcm_substream *substream;
3279 struct snd_pcm_runtime *runtime;
3281 pcm_file = file->private_data;
3282 substream = pcm_file->substream;
3283 if (PCM_RUNTIME_CHECK(substream))
3285 runtime = substream->runtime;
3286 return fasync_helper(fd, file, on, &runtime->fasync);
3292 #ifdef CONFIG_COMPAT
3293 #include "pcm_compat.c"
3295 #define snd_pcm_ioctl_compat NULL
3299 * To be removed helpers to keep binary compatibility
3302 #ifdef CONFIG_SND_SUPPORT_OLD_API
3303 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3304 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3306 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3307 struct snd_pcm_hw_params_old *oparams)
3311 memset(params, 0, sizeof(*params));
3312 params->flags = oparams->flags;
3313 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3314 params->masks[i].bits[0] = oparams->masks[i];
3315 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3316 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3317 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3318 params->info = oparams->info;
3319 params->msbits = oparams->msbits;
3320 params->rate_num = oparams->rate_num;
3321 params->rate_den = oparams->rate_den;
3322 params->fifo_size = oparams->fifo_size;
3325 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3326 struct snd_pcm_hw_params *params)
3330 memset(oparams, 0, sizeof(*oparams));
3331 oparams->flags = params->flags;
3332 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3333 oparams->masks[i] = params->masks[i].bits[0];
3334 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3335 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3336 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3337 oparams->info = params->info;
3338 oparams->msbits = params->msbits;
3339 oparams->rate_num = params->rate_num;
3340 oparams->rate_den = params->rate_den;
3341 oparams->fifo_size = params->fifo_size;
3344 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3345 struct snd_pcm_hw_params_old __user * _oparams)
3347 struct snd_pcm_hw_params *params;
3348 struct snd_pcm_hw_params_old *oparams = NULL;
3351 params = kmalloc(sizeof(*params), GFP_KERNEL);
3355 oparams = memdup_user(_oparams, sizeof(*oparams));
3356 if (IS_ERR(oparams)) {
3357 err = PTR_ERR(oparams);
3360 snd_pcm_hw_convert_from_old_params(params, oparams);
3361 err = snd_pcm_hw_refine(substream, params);
3362 snd_pcm_hw_convert_to_old_params(oparams, params);
3363 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3374 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3375 struct snd_pcm_hw_params_old __user * _oparams)
3377 struct snd_pcm_hw_params *params;
3378 struct snd_pcm_hw_params_old *oparams = NULL;
3381 params = kmalloc(sizeof(*params), GFP_KERNEL);
3385 oparams = memdup_user(_oparams, sizeof(*oparams));
3386 if (IS_ERR(oparams)) {
3387 err = PTR_ERR(oparams);
3390 snd_pcm_hw_convert_from_old_params(params, oparams);
3391 err = snd_pcm_hw_params(substream, params);
3392 snd_pcm_hw_convert_to_old_params(oparams, params);
3393 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3403 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3406 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3409 unsigned long pgoff,
3410 unsigned long flags)
3412 struct snd_pcm_file *pcm_file = file->private_data;
3413 struct snd_pcm_substream *substream = pcm_file->substream;
3414 struct snd_pcm_runtime *runtime = substream->runtime;
3415 unsigned long offset = pgoff << PAGE_SHIFT;
3418 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3419 return (unsigned long)runtime->status;
3420 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3421 return (unsigned long)runtime->control;
3423 return (unsigned long)runtime->dma_area + offset;
3427 # define snd_pcm_get_unmapped_area NULL
3434 const struct file_operations snd_pcm_f_ops[2] = {
3436 .owner = THIS_MODULE,
3437 .write = snd_pcm_write,
3438 .aio_write = snd_pcm_aio_write,
3439 .open = snd_pcm_playback_open,
3440 .release = snd_pcm_release,
3441 .llseek = no_llseek,
3442 .poll = snd_pcm_playback_poll,
3443 .unlocked_ioctl = snd_pcm_playback_ioctl,
3444 .compat_ioctl = snd_pcm_ioctl_compat,
3445 .mmap = snd_pcm_mmap,
3446 .fasync = snd_pcm_fasync,
3447 .get_unmapped_area = snd_pcm_get_unmapped_area,
3450 .owner = THIS_MODULE,
3451 .read = snd_pcm_read,
3452 .aio_read = snd_pcm_aio_read,
3453 .open = snd_pcm_capture_open,
3454 .release = snd_pcm_release,
3455 .llseek = no_llseek,
3456 .poll = snd_pcm_capture_poll,
3457 .unlocked_ioctl = snd_pcm_capture_ioctl,
3458 .compat_ioctl = snd_pcm_ioctl_compat,
3459 .mmap = snd_pcm_mmap,
3460 .fasync = snd_pcm_fasync,
3461 .get_unmapped_area = snd_pcm_get_unmapped_area,