2 * Digital Audio (PCM) abstract layer
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/module.h>
24 #include <linux/file.h>
25 #include <linux/slab.h>
26 #include <linux/time.h>
27 #include <linux/pm_qos.h>
28 #include <linux/uio.h>
29 #include <linux/dma-mapping.h>
30 #include <sound/core.h>
31 #include <sound/control.h>
32 #include <sound/info.h>
33 #include <sound/pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/timer.h>
36 #include <sound/minors.h>
38 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
39 #include <dma-coherence.h>
46 struct snd_pcm_hw_params_old {
48 unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
49 SNDRV_PCM_HW_PARAM_ACCESS + 1];
50 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
51 SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
56 unsigned int rate_num;
57 unsigned int rate_den;
58 snd_pcm_uframes_t fifo_size;
59 unsigned char reserved[64];
62 #ifdef CONFIG_SND_SUPPORT_OLD_API
63 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
64 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
66 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
67 struct snd_pcm_hw_params_old __user * _oparams);
68 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
69 struct snd_pcm_hw_params_old __user * _oparams);
71 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
77 DEFINE_RWLOCK(snd_pcm_link_rwlock);
78 EXPORT_SYMBOL(snd_pcm_link_rwlock);
80 static DECLARE_RWSEM(snd_pcm_link_rwsem);
82 static inline mm_segment_t snd_enter_user(void)
84 mm_segment_t fs = get_fs();
89 static inline void snd_leave_user(mm_segment_t fs)
96 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
98 struct snd_pcm_runtime *runtime;
99 struct snd_pcm *pcm = substream->pcm;
100 struct snd_pcm_str *pstr = substream->pstr;
102 memset(info, 0, sizeof(*info));
103 info->card = pcm->card->number;
104 info->device = pcm->device;
105 info->stream = substream->stream;
106 info->subdevice = substream->number;
107 strlcpy(info->id, pcm->id, sizeof(info->id));
108 strlcpy(info->name, pcm->name, sizeof(info->name));
109 info->dev_class = pcm->dev_class;
110 info->dev_subclass = pcm->dev_subclass;
111 info->subdevices_count = pstr->substream_count;
112 info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
113 strlcpy(info->subname, substream->name, sizeof(info->subname));
114 runtime = substream->runtime;
115 /* AB: FIXME!!! This is definitely nonsense */
117 info->sync = runtime->sync;
118 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
123 int snd_pcm_info_user(struct snd_pcm_substream *substream,
124 struct snd_pcm_info __user * _info)
126 struct snd_pcm_info *info;
129 info = kmalloc(sizeof(*info), GFP_KERNEL);
132 err = snd_pcm_info(substream, info);
134 if (copy_to_user(_info, info, sizeof(*info)))
144 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
145 static const char * const snd_pcm_hw_param_names[] = {
149 HW_PARAM(SAMPLE_BITS),
150 HW_PARAM(FRAME_BITS),
153 HW_PARAM(PERIOD_TIME),
154 HW_PARAM(PERIOD_SIZE),
155 HW_PARAM(PERIOD_BYTES),
157 HW_PARAM(BUFFER_TIME),
158 HW_PARAM(BUFFER_SIZE),
159 HW_PARAM(BUFFER_BYTES),
164 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
165 struct snd_pcm_hw_params *params)
168 struct snd_pcm_hardware *hw;
169 struct snd_interval *i = NULL;
170 struct snd_mask *m = NULL;
171 struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
172 unsigned int rstamps[constrs->rules_num];
173 unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
174 unsigned int stamp = 2;
178 params->fifo_size = 0;
179 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
181 if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
182 params->rate_num = 0;
183 params->rate_den = 0;
186 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
187 m = hw_param_mask(params, k);
188 if (snd_mask_empty(m))
190 if (!(params->rmask & (1 << k)))
193 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
194 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
196 changed = snd_mask_refine(m, constrs_mask(constrs, k));
198 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
201 params->cmask |= 1 << k;
206 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
207 i = hw_param_interval(params, k);
208 if (snd_interval_empty(i))
210 if (!(params->rmask & (1 << k)))
213 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
218 i->openmin ? '(' : '[', i->min,
219 i->max, i->openmax ? ')' : ']');
222 changed = snd_interval_refine(i, constrs_interval(constrs, k));
227 printk("%c%u %u%c\n",
228 i->openmin ? '(' : '[', i->min,
229 i->max, i->openmax ? ')' : ']');
232 params->cmask |= 1 << k;
237 for (k = 0; k < constrs->rules_num; k++)
239 for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
240 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
243 for (k = 0; k < constrs->rules_num; k++) {
244 struct snd_pcm_hw_rule *r = &constrs->rules[k];
247 if (r->cond && !(r->cond & params->flags))
249 for (d = 0; r->deps[d] >= 0; d++) {
250 if (vstamps[r->deps[d]] > rstamps[k]) {
258 printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
260 printk("%s = ", snd_pcm_hw_param_names[r->var]);
261 if (hw_is_mask(r->var)) {
262 m = hw_param_mask(params, r->var);
263 printk("%x", *m->bits);
265 i = hw_param_interval(params, r->var);
270 i->openmin ? '(' : '[', i->min,
271 i->max, i->openmax ? ')' : ']');
275 changed = r->func(params, r);
279 if (hw_is_mask(r->var))
280 printk("%x", *m->bits);
286 i->openmin ? '(' : '[', i->min,
287 i->max, i->openmax ? ')' : ']');
293 if (changed && r->var >= 0) {
294 params->cmask |= (1 << r->var);
295 vstamps[r->var] = stamp;
303 if (!params->msbits) {
304 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
305 if (snd_interval_single(i))
306 params->msbits = snd_interval_value(i);
309 if (!params->rate_den) {
310 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
311 if (snd_interval_single(i)) {
312 params->rate_num = snd_interval_value(i);
313 params->rate_den = 1;
317 hw = &substream->runtime->hw;
319 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
320 if (!params->fifo_size) {
321 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
322 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
323 if (snd_mask_min(m) == snd_mask_max(m) &&
324 snd_interval_min(i) == snd_interval_max(i)) {
325 changed = substream->ops->ioctl(substream,
326 SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
335 EXPORT_SYMBOL(snd_pcm_hw_refine);
337 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
338 struct snd_pcm_hw_params __user * _params)
340 struct snd_pcm_hw_params *params;
343 params = memdup_user(_params, sizeof(*params));
345 return PTR_ERR(params);
347 err = snd_pcm_hw_refine(substream, params);
348 if (copy_to_user(_params, params, sizeof(*params))) {
357 static int period_to_usecs(struct snd_pcm_runtime *runtime)
362 return -1; /* invalid */
364 /* take 75% of period time as the deadline */
365 usecs = (750000 / runtime->rate) * runtime->period_size;
366 usecs += ((750000 % runtime->rate) * runtime->period_size) /
372 static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
374 snd_pcm_stream_lock_irq(substream);
375 if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
376 substream->runtime->status->state = state;
377 snd_pcm_stream_unlock_irq(substream);
380 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
381 struct snd_pcm_hw_params *params)
383 struct snd_pcm_runtime *runtime;
386 snd_pcm_uframes_t frames;
388 if (PCM_RUNTIME_CHECK(substream))
390 runtime = substream->runtime;
391 snd_pcm_stream_lock_irq(substream);
392 switch (runtime->status->state) {
393 case SNDRV_PCM_STATE_OPEN:
394 case SNDRV_PCM_STATE_SETUP:
395 case SNDRV_PCM_STATE_PREPARED:
398 snd_pcm_stream_unlock_irq(substream);
401 snd_pcm_stream_unlock_irq(substream);
402 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
403 if (!substream->oss.oss)
405 if (atomic_read(&substream->mmap_count))
409 err = snd_pcm_hw_refine(substream, params);
413 err = snd_pcm_hw_params_choose(substream, params);
417 if (substream->ops->hw_params != NULL) {
418 err = substream->ops->hw_params(substream, params);
423 runtime->access = params_access(params);
424 runtime->format = params_format(params);
425 runtime->subformat = params_subformat(params);
426 runtime->channels = params_channels(params);
427 runtime->rate = params_rate(params);
428 runtime->period_size = params_period_size(params);
429 runtime->periods = params_periods(params);
430 runtime->buffer_size = params_buffer_size(params);
431 runtime->info = params->info;
432 runtime->rate_num = params->rate_num;
433 runtime->rate_den = params->rate_den;
434 runtime->no_period_wakeup =
435 (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
436 (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
438 bits = snd_pcm_format_physical_width(runtime->format);
439 runtime->sample_bits = bits;
440 bits *= runtime->channels;
441 runtime->frame_bits = bits;
443 while (bits % 8 != 0) {
447 runtime->byte_align = bits / 8;
448 runtime->min_align = frames;
450 /* Default sw params */
451 runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
452 runtime->period_step = 1;
453 runtime->control->avail_min = runtime->period_size;
454 runtime->start_threshold = 1;
455 runtime->stop_threshold = runtime->buffer_size;
456 runtime->silence_threshold = 0;
457 runtime->silence_size = 0;
458 runtime->boundary = runtime->buffer_size;
459 while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
460 runtime->boundary *= 2;
462 snd_pcm_timer_resolution_change(substream);
463 snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
465 if (pm_qos_request_active(&substream->latency_pm_qos_req))
466 pm_qos_remove_request(&substream->latency_pm_qos_req);
467 if ((usecs = period_to_usecs(runtime)) >= 0)
468 pm_qos_add_request(&substream->latency_pm_qos_req,
469 PM_QOS_CPU_DMA_LATENCY, usecs);
472 /* hardware might be unusable from this time,
473 so we force application to retry to set
474 the correct hardware parameter settings */
475 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
476 if (substream->ops->hw_free != NULL)
477 substream->ops->hw_free(substream);
481 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
482 struct snd_pcm_hw_params __user * _params)
484 struct snd_pcm_hw_params *params;
487 params = memdup_user(_params, sizeof(*params));
489 return PTR_ERR(params);
491 err = snd_pcm_hw_params(substream, params);
492 if (copy_to_user(_params, params, sizeof(*params))) {
501 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
503 struct snd_pcm_runtime *runtime;
506 if (PCM_RUNTIME_CHECK(substream))
508 runtime = substream->runtime;
509 snd_pcm_stream_lock_irq(substream);
510 switch (runtime->status->state) {
511 case SNDRV_PCM_STATE_SETUP:
512 case SNDRV_PCM_STATE_PREPARED:
515 snd_pcm_stream_unlock_irq(substream);
518 snd_pcm_stream_unlock_irq(substream);
519 if (atomic_read(&substream->mmap_count))
521 if (substream->ops->hw_free)
522 result = substream->ops->hw_free(substream);
523 snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
524 pm_qos_remove_request(&substream->latency_pm_qos_req);
528 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
529 struct snd_pcm_sw_params *params)
531 struct snd_pcm_runtime *runtime;
534 if (PCM_RUNTIME_CHECK(substream))
536 runtime = substream->runtime;
537 snd_pcm_stream_lock_irq(substream);
538 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
539 snd_pcm_stream_unlock_irq(substream);
542 snd_pcm_stream_unlock_irq(substream);
544 if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
546 if (params->avail_min == 0)
548 if (params->silence_size >= runtime->boundary) {
549 if (params->silence_threshold != 0)
552 if (params->silence_size > params->silence_threshold)
554 if (params->silence_threshold > runtime->buffer_size)
558 snd_pcm_stream_lock_irq(substream);
559 runtime->tstamp_mode = params->tstamp_mode;
560 runtime->period_step = params->period_step;
561 runtime->control->avail_min = params->avail_min;
562 runtime->start_threshold = params->start_threshold;
563 runtime->stop_threshold = params->stop_threshold;
564 runtime->silence_threshold = params->silence_threshold;
565 runtime->silence_size = params->silence_size;
566 params->boundary = runtime->boundary;
567 if (snd_pcm_running(substream)) {
568 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
569 runtime->silence_size > 0)
570 snd_pcm_playback_silence(substream, ULONG_MAX);
571 err = snd_pcm_update_state(substream, runtime);
573 snd_pcm_stream_unlock_irq(substream);
577 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
578 struct snd_pcm_sw_params __user * _params)
580 struct snd_pcm_sw_params params;
582 if (copy_from_user(¶ms, _params, sizeof(params)))
584 err = snd_pcm_sw_params(substream, ¶ms);
585 if (copy_to_user(_params, ¶ms, sizeof(params)))
590 int snd_pcm_status(struct snd_pcm_substream *substream,
591 struct snd_pcm_status *status)
593 struct snd_pcm_runtime *runtime = substream->runtime;
595 snd_pcm_stream_lock_irq(substream);
596 status->state = runtime->status->state;
597 status->suspended_state = runtime->status->suspended_state;
598 if (status->state == SNDRV_PCM_STATE_OPEN)
600 status->trigger_tstamp = runtime->trigger_tstamp;
601 if (snd_pcm_running(substream)) {
602 snd_pcm_update_hw_ptr(substream);
603 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
604 status->tstamp = runtime->status->tstamp;
608 snd_pcm_gettime(runtime, &status->tstamp);
610 status->appl_ptr = runtime->control->appl_ptr;
611 status->hw_ptr = runtime->status->hw_ptr;
612 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
613 status->avail = snd_pcm_playback_avail(runtime);
614 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
615 runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
616 status->delay = runtime->buffer_size - status->avail;
617 status->delay += runtime->delay;
621 status->avail = snd_pcm_capture_avail(runtime);
622 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
623 status->delay = status->avail + runtime->delay;
627 status->avail_max = runtime->avail_max;
628 status->overrange = runtime->overrange;
629 runtime->avail_max = 0;
630 runtime->overrange = 0;
632 snd_pcm_stream_unlock_irq(substream);
636 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
637 struct snd_pcm_status __user * _status)
639 struct snd_pcm_status status;
642 memset(&status, 0, sizeof(status));
643 res = snd_pcm_status(substream, &status);
646 if (copy_to_user(_status, &status, sizeof(status)))
651 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
652 struct snd_pcm_channel_info * info)
654 struct snd_pcm_runtime *runtime;
655 unsigned int channel;
657 channel = info->channel;
658 runtime = substream->runtime;
659 snd_pcm_stream_lock_irq(substream);
660 if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
661 snd_pcm_stream_unlock_irq(substream);
664 snd_pcm_stream_unlock_irq(substream);
665 if (channel >= runtime->channels)
667 memset(info, 0, sizeof(*info));
668 info->channel = channel;
669 return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
672 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
673 struct snd_pcm_channel_info __user * _info)
675 struct snd_pcm_channel_info info;
678 if (copy_from_user(&info, _info, sizeof(info)))
680 res = snd_pcm_channel_info(substream, &info);
683 if (copy_to_user(_info, &info, sizeof(info)))
688 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
690 struct snd_pcm_runtime *runtime = substream->runtime;
691 if (runtime->trigger_master == NULL)
693 if (runtime->trigger_master == substream) {
694 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
696 snd_pcm_trigger_tstamp(runtime->trigger_master);
697 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
699 runtime->trigger_master = NULL;
703 int (*pre_action)(struct snd_pcm_substream *substream, int state);
704 int (*do_action)(struct snd_pcm_substream *substream, int state);
705 void (*undo_action)(struct snd_pcm_substream *substream, int state);
706 void (*post_action)(struct snd_pcm_substream *substream, int state);
710 * this functions is core for handling of linked stream
711 * Note: the stream state might be changed also on failure
712 * Note2: call with calling stream lock + link lock
714 static int snd_pcm_action_group(struct action_ops *ops,
715 struct snd_pcm_substream *substream,
716 int state, int do_lock)
718 struct snd_pcm_substream *s = NULL;
719 struct snd_pcm_substream *s1;
722 snd_pcm_group_for_each_entry(s, substream) {
723 if (do_lock && s != substream)
724 spin_lock_nested(&s->self_group.lock,
725 SINGLE_DEPTH_NESTING);
726 res = ops->pre_action(s, state);
730 snd_pcm_group_for_each_entry(s, substream) {
731 res = ops->do_action(s, state);
733 if (ops->undo_action) {
734 snd_pcm_group_for_each_entry(s1, substream) {
735 if (s1 == s) /* failed stream */
737 ops->undo_action(s1, state);
740 s = NULL; /* unlock all */
744 snd_pcm_group_for_each_entry(s, substream) {
745 ops->post_action(s, state);
750 snd_pcm_group_for_each_entry(s1, substream) {
752 spin_unlock(&s1->self_group.lock);
753 if (s1 == s) /* end */
761 * Note: call with stream lock
763 static int snd_pcm_action_single(struct action_ops *ops,
764 struct snd_pcm_substream *substream,
769 res = ops->pre_action(substream, state);
772 res = ops->do_action(substream, state);
774 ops->post_action(substream, state);
775 else if (ops->undo_action)
776 ops->undo_action(substream, state);
781 * Note: call with stream lock
783 static int snd_pcm_action(struct action_ops *ops,
784 struct snd_pcm_substream *substream,
789 if (snd_pcm_stream_linked(substream)) {
790 if (!spin_trylock(&substream->group->lock)) {
791 spin_unlock(&substream->self_group.lock);
792 spin_lock(&substream->group->lock);
793 spin_lock(&substream->self_group.lock);
795 res = snd_pcm_action_group(ops, substream, state, 1);
796 spin_unlock(&substream->group->lock);
798 res = snd_pcm_action_single(ops, substream, state);
804 * Note: don't use any locks before
806 static int snd_pcm_action_lock_irq(struct action_ops *ops,
807 struct snd_pcm_substream *substream,
812 read_lock_irq(&snd_pcm_link_rwlock);
813 if (snd_pcm_stream_linked(substream)) {
814 spin_lock(&substream->group->lock);
815 spin_lock(&substream->self_group.lock);
816 res = snd_pcm_action_group(ops, substream, state, 1);
817 spin_unlock(&substream->self_group.lock);
818 spin_unlock(&substream->group->lock);
820 spin_lock(&substream->self_group.lock);
821 res = snd_pcm_action_single(ops, substream, state);
822 spin_unlock(&substream->self_group.lock);
824 read_unlock_irq(&snd_pcm_link_rwlock);
830 static int snd_pcm_action_nonatomic(struct action_ops *ops,
831 struct snd_pcm_substream *substream,
836 down_read(&snd_pcm_link_rwsem);
837 if (snd_pcm_stream_linked(substream))
838 res = snd_pcm_action_group(ops, substream, state, 0);
840 res = snd_pcm_action_single(ops, substream, state);
841 up_read(&snd_pcm_link_rwsem);
848 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
850 struct snd_pcm_runtime *runtime = substream->runtime;
851 if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
853 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
854 !snd_pcm_playback_data(substream))
856 runtime->trigger_master = substream;
860 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
862 if (substream->runtime->trigger_master != substream)
864 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
867 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
869 if (substream->runtime->trigger_master == substream)
870 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
873 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
875 struct snd_pcm_runtime *runtime = substream->runtime;
876 snd_pcm_trigger_tstamp(substream);
877 runtime->hw_ptr_jiffies = jiffies;
878 runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
880 runtime->status->state = state;
881 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
882 runtime->silence_size > 0)
883 snd_pcm_playback_silence(substream, ULONG_MAX);
884 if (substream->timer)
885 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
886 &runtime->trigger_tstamp);
889 static struct action_ops snd_pcm_action_start = {
890 .pre_action = snd_pcm_pre_start,
891 .do_action = snd_pcm_do_start,
892 .undo_action = snd_pcm_undo_start,
893 .post_action = snd_pcm_post_start
897 * snd_pcm_start - start all linked streams
898 * @substream: the PCM substream instance
900 int snd_pcm_start(struct snd_pcm_substream *substream)
902 return snd_pcm_action(&snd_pcm_action_start, substream,
903 SNDRV_PCM_STATE_RUNNING);
909 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
911 struct snd_pcm_runtime *runtime = substream->runtime;
912 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
914 runtime->trigger_master = substream;
918 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
920 if (substream->runtime->trigger_master == substream &&
921 snd_pcm_running(substream))
922 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
923 return 0; /* unconditonally stop all substreams */
926 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
928 struct snd_pcm_runtime *runtime = substream->runtime;
929 if (runtime->status->state != state) {
930 snd_pcm_trigger_tstamp(substream);
931 if (substream->timer)
932 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
933 &runtime->trigger_tstamp);
934 runtime->status->state = state;
936 wake_up(&runtime->sleep);
937 wake_up(&runtime->tsleep);
940 static struct action_ops snd_pcm_action_stop = {
941 .pre_action = snd_pcm_pre_stop,
942 .do_action = snd_pcm_do_stop,
943 .post_action = snd_pcm_post_stop
947 * snd_pcm_stop - try to stop all running streams in the substream group
948 * @substream: the PCM substream instance
949 * @state: PCM state after stopping the stream
951 * The state of each stream is then changed to the given state unconditionally.
953 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
955 return snd_pcm_action(&snd_pcm_action_stop, substream, state);
958 EXPORT_SYMBOL(snd_pcm_stop);
961 * snd_pcm_drain_done - stop the DMA only when the given stream is playback
962 * @substream: the PCM substream
964 * After stopping, the state is changed to SETUP.
965 * Unlike snd_pcm_stop(), this affects only the given stream.
967 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
969 return snd_pcm_action_single(&snd_pcm_action_stop, substream,
970 SNDRV_PCM_STATE_SETUP);
976 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
978 struct snd_pcm_runtime *runtime = substream->runtime;
979 if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
982 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
984 } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
986 runtime->trigger_master = substream;
990 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
992 if (substream->runtime->trigger_master != substream)
994 /* some drivers might use hw_ptr to recover from the pause -
995 update the hw_ptr now */
997 snd_pcm_update_hw_ptr(substream);
998 /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
999 * a delta between the current jiffies, this gives a large enough
1000 * delta, effectively to skip the check once.
1002 substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1003 return substream->ops->trigger(substream,
1004 push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1005 SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1008 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1010 if (substream->runtime->trigger_master == substream)
1011 substream->ops->trigger(substream,
1012 push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1013 SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1016 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1018 struct snd_pcm_runtime *runtime = substream->runtime;
1019 snd_pcm_trigger_tstamp(substream);
1021 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1022 if (substream->timer)
1023 snd_timer_notify(substream->timer,
1024 SNDRV_TIMER_EVENT_MPAUSE,
1025 &runtime->trigger_tstamp);
1026 wake_up(&runtime->sleep);
1027 wake_up(&runtime->tsleep);
1029 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1030 if (substream->timer)
1031 snd_timer_notify(substream->timer,
1032 SNDRV_TIMER_EVENT_MCONTINUE,
1033 &runtime->trigger_tstamp);
1037 static struct action_ops snd_pcm_action_pause = {
1038 .pre_action = snd_pcm_pre_pause,
1039 .do_action = snd_pcm_do_pause,
1040 .undo_action = snd_pcm_undo_pause,
1041 .post_action = snd_pcm_post_pause
1045 * Push/release the pause for all linked streams.
1047 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1049 return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1055 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1057 struct snd_pcm_runtime *runtime = substream->runtime;
1058 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1060 runtime->trigger_master = substream;
1064 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1066 struct snd_pcm_runtime *runtime = substream->runtime;
1067 if (runtime->trigger_master != substream)
1069 if (! snd_pcm_running(substream))
1071 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1072 return 0; /* suspend unconditionally */
1075 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1077 struct snd_pcm_runtime *runtime = substream->runtime;
1078 snd_pcm_trigger_tstamp(substream);
1079 if (substream->timer)
1080 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1081 &runtime->trigger_tstamp);
1082 runtime->status->suspended_state = runtime->status->state;
1083 runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1084 wake_up(&runtime->sleep);
1085 wake_up(&runtime->tsleep);
1088 static struct action_ops snd_pcm_action_suspend = {
1089 .pre_action = snd_pcm_pre_suspend,
1090 .do_action = snd_pcm_do_suspend,
1091 .post_action = snd_pcm_post_suspend
1095 * snd_pcm_suspend - trigger SUSPEND to all linked streams
1096 * @substream: the PCM substream
1098 * After this call, all streams are changed to SUSPENDED state.
1100 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1103 unsigned long flags;
1108 snd_pcm_stream_lock_irqsave(substream, flags);
1109 err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1110 snd_pcm_stream_unlock_irqrestore(substream, flags);
1114 EXPORT_SYMBOL(snd_pcm_suspend);
1117 * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1118 * @pcm: the PCM instance
1120 * After this call, all streams are changed to SUSPENDED state.
1122 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1124 struct snd_pcm_substream *substream;
1125 int stream, err = 0;
1130 for (stream = 0; stream < 2; stream++) {
1131 for (substream = pcm->streams[stream].substream;
1132 substream; substream = substream->next) {
1133 /* FIXME: the open/close code should lock this as well */
1134 if (substream->runtime == NULL)
1136 err = snd_pcm_suspend(substream);
1137 if (err < 0 && err != -EBUSY)
1144 EXPORT_SYMBOL(snd_pcm_suspend_all);
1148 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1150 struct snd_pcm_runtime *runtime = substream->runtime;
1151 if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1153 runtime->trigger_master = substream;
1157 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1159 struct snd_pcm_runtime *runtime = substream->runtime;
1160 if (runtime->trigger_master != substream)
1162 /* DMA not running previously? */
1163 if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1164 (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1165 substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1167 return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1170 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1172 if (substream->runtime->trigger_master == substream &&
1173 snd_pcm_running(substream))
1174 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1177 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1179 struct snd_pcm_runtime *runtime = substream->runtime;
1180 snd_pcm_trigger_tstamp(substream);
1181 if (substream->timer)
1182 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1183 &runtime->trigger_tstamp);
1184 runtime->status->state = runtime->status->suspended_state;
1187 static struct action_ops snd_pcm_action_resume = {
1188 .pre_action = snd_pcm_pre_resume,
1189 .do_action = snd_pcm_do_resume,
1190 .undo_action = snd_pcm_undo_resume,
1191 .post_action = snd_pcm_post_resume
1194 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1196 struct snd_card *card = substream->pcm->card;
1199 snd_power_lock(card);
1200 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1201 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1202 snd_power_unlock(card);
1208 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1213 #endif /* CONFIG_PM */
1218 * Change the RUNNING stream(s) to XRUN state.
1220 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1222 struct snd_card *card = substream->pcm->card;
1223 struct snd_pcm_runtime *runtime = substream->runtime;
1226 snd_power_lock(card);
1227 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1228 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1233 snd_pcm_stream_lock_irq(substream);
1234 switch (runtime->status->state) {
1235 case SNDRV_PCM_STATE_XRUN:
1236 result = 0; /* already there */
1238 case SNDRV_PCM_STATE_RUNNING:
1239 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1244 snd_pcm_stream_unlock_irq(substream);
1246 snd_power_unlock(card);
1253 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1255 struct snd_pcm_runtime *runtime = substream->runtime;
1256 switch (runtime->status->state) {
1257 case SNDRV_PCM_STATE_RUNNING:
1258 case SNDRV_PCM_STATE_PREPARED:
1259 case SNDRV_PCM_STATE_PAUSED:
1260 case SNDRV_PCM_STATE_SUSPENDED:
1267 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1269 struct snd_pcm_runtime *runtime = substream->runtime;
1270 int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1273 runtime->hw_ptr_base = 0;
1274 runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1275 runtime->status->hw_ptr % runtime->period_size;
1276 runtime->silence_start = runtime->status->hw_ptr;
1277 runtime->silence_filled = 0;
1281 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1283 struct snd_pcm_runtime *runtime = substream->runtime;
1284 runtime->control->appl_ptr = runtime->status->hw_ptr;
1285 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1286 runtime->silence_size > 0)
1287 snd_pcm_playback_silence(substream, ULONG_MAX);
1290 static struct action_ops snd_pcm_action_reset = {
1291 .pre_action = snd_pcm_pre_reset,
1292 .do_action = snd_pcm_do_reset,
1293 .post_action = snd_pcm_post_reset
1296 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1298 return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1304 /* we use the second argument for updating f_flags */
1305 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1308 struct snd_pcm_runtime *runtime = substream->runtime;
1309 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1310 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1312 if (snd_pcm_running(substream))
1314 substream->f_flags = f_flags;
1318 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1321 err = substream->ops->prepare(substream);
1324 return snd_pcm_do_reset(substream, 0);
1327 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1329 struct snd_pcm_runtime *runtime = substream->runtime;
1330 runtime->control->appl_ptr = runtime->status->hw_ptr;
1331 snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1334 static struct action_ops snd_pcm_action_prepare = {
1335 .pre_action = snd_pcm_pre_prepare,
1336 .do_action = snd_pcm_do_prepare,
1337 .post_action = snd_pcm_post_prepare
1341 * snd_pcm_prepare - prepare the PCM substream to be triggerable
1342 * @substream: the PCM substream instance
1343 * @file: file to refer f_flags
1345 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1349 struct snd_card *card = substream->pcm->card;
1353 f_flags = file->f_flags;
1355 f_flags = substream->f_flags;
1357 snd_power_lock(card);
1358 if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1359 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1360 substream, f_flags);
1361 snd_power_unlock(card);
1369 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1371 struct snd_pcm_runtime *runtime = substream->runtime;
1372 switch (runtime->status->state) {
1373 case SNDRV_PCM_STATE_OPEN:
1374 case SNDRV_PCM_STATE_DISCONNECTED:
1375 case SNDRV_PCM_STATE_SUSPENDED:
1378 runtime->trigger_master = substream;
1382 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1384 struct snd_pcm_runtime *runtime = substream->runtime;
1385 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1386 switch (runtime->status->state) {
1387 case SNDRV_PCM_STATE_PREPARED:
1388 /* start playback stream if possible */
1389 if (! snd_pcm_playback_empty(substream)) {
1390 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1391 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1394 case SNDRV_PCM_STATE_RUNNING:
1395 runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1397 case SNDRV_PCM_STATE_XRUN:
1398 runtime->status->state = SNDRV_PCM_STATE_SETUP;
1404 /* stop running stream */
1405 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1406 int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1407 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1408 snd_pcm_do_stop(substream, new_state);
1409 snd_pcm_post_stop(substream, new_state);
1415 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1419 static struct action_ops snd_pcm_action_drain_init = {
1420 .pre_action = snd_pcm_pre_drain_init,
1421 .do_action = snd_pcm_do_drain_init,
1422 .post_action = snd_pcm_post_drain_init
1425 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1428 * Drain the stream(s).
1429 * When the substream is linked, sync until the draining of all playback streams
1431 * After this call, all streams are supposed to be either SETUP or DRAINING
1432 * (capture only) state.
1434 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1437 struct snd_card *card;
1438 struct snd_pcm_runtime *runtime;
1439 struct snd_pcm_substream *s;
1444 card = substream->pcm->card;
1445 runtime = substream->runtime;
1447 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1450 snd_power_lock(card);
1451 if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1452 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1454 snd_power_unlock(card);
1460 if (file->f_flags & O_NONBLOCK)
1462 } else if (substream->f_flags & O_NONBLOCK)
1465 down_read(&snd_pcm_link_rwsem);
1466 snd_pcm_stream_lock_irq(substream);
1468 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1469 snd_pcm_pause(substream, 0);
1471 /* pre-start/stop - all running streams are changed to DRAINING state */
1472 result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1475 /* in non-blocking, we don't wait in ioctl but let caller poll */
1483 struct snd_pcm_runtime *to_check;
1484 if (signal_pending(current)) {
1485 result = -ERESTARTSYS;
1488 /* find a substream to drain */
1490 snd_pcm_group_for_each_entry(s, substream) {
1491 if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1493 runtime = s->runtime;
1494 if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1500 break; /* all drained */
1501 init_waitqueue_entry(&wait, current);
1502 add_wait_queue(&to_check->sleep, &wait);
1503 snd_pcm_stream_unlock_irq(substream);
1504 up_read(&snd_pcm_link_rwsem);
1505 snd_power_unlock(card);
1506 if (runtime->no_period_wakeup)
1507 tout = MAX_SCHEDULE_TIMEOUT;
1510 if (runtime->rate) {
1511 long t = runtime->period_size * 2 / runtime->rate;
1512 tout = max(t, tout);
1514 tout = msecs_to_jiffies(tout * 1000);
1516 tout = schedule_timeout_interruptible(tout);
1517 snd_power_lock(card);
1518 down_read(&snd_pcm_link_rwsem);
1519 snd_pcm_stream_lock_irq(substream);
1520 remove_wait_queue(&to_check->sleep, &wait);
1522 if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1525 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1526 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1534 snd_pcm_stream_unlock_irq(substream);
1535 up_read(&snd_pcm_link_rwsem);
1536 snd_power_unlock(card);
1544 * Immediately put all linked substreams into SETUP state.
1546 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1548 struct snd_pcm_runtime *runtime;
1551 if (PCM_RUNTIME_CHECK(substream))
1553 runtime = substream->runtime;
1555 if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1556 runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1557 runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1560 snd_pcm_stream_lock_irq(substream);
1562 if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1563 snd_pcm_pause(substream, 0);
1565 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1566 /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1567 snd_pcm_stream_unlock_irq(substream);
1573 /* WARNING: Don't forget to fput back the file */
1574 static struct file *snd_pcm_file_fd(int fd, int *fput_needed)
1577 struct inode *inode;
1580 file = fget_light(fd, fput_needed);
1583 inode = file->f_path.dentry->d_inode;
1584 if (!S_ISCHR(inode->i_mode) ||
1585 imajor(inode) != snd_major) {
1586 fput_light(file, *fput_needed);
1589 minor = iminor(inode);
1590 if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1591 !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1592 fput_light(file, *fput_needed);
1601 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1605 struct snd_pcm_file *pcm_file;
1606 struct snd_pcm_substream *substream1;
1607 struct snd_pcm_group *group;
1610 file = snd_pcm_file_fd(fd, &fput_needed);
1613 pcm_file = file->private_data;
1614 substream1 = pcm_file->substream;
1615 group = kmalloc(sizeof(*group), GFP_KERNEL);
1620 down_write(&snd_pcm_link_rwsem);
1621 write_lock_irq(&snd_pcm_link_rwlock);
1622 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1623 substream->runtime->status->state != substream1->runtime->status->state) {
1627 if (snd_pcm_stream_linked(substream1)) {
1631 if (!snd_pcm_stream_linked(substream)) {
1632 substream->group = group;
1633 spin_lock_init(&substream->group->lock);
1634 INIT_LIST_HEAD(&substream->group->substreams);
1635 list_add_tail(&substream->link_list, &substream->group->substreams);
1636 substream->group->count = 1;
1638 list_add_tail(&substream1->link_list, &substream->group->substreams);
1639 substream->group->count++;
1640 substream1->group = substream->group;
1642 write_unlock_irq(&snd_pcm_link_rwlock);
1643 up_write(&snd_pcm_link_rwsem);
1645 snd_card_unref(substream1->pcm->card);
1646 fput_light(file, fput_needed);
1652 static void relink_to_local(struct snd_pcm_substream *substream)
1654 substream->group = &substream->self_group;
1655 INIT_LIST_HEAD(&substream->self_group.substreams);
1656 list_add_tail(&substream->link_list, &substream->self_group.substreams);
1659 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1661 struct snd_pcm_substream *s;
1664 down_write(&snd_pcm_link_rwsem);
1665 write_lock_irq(&snd_pcm_link_rwlock);
1666 if (!snd_pcm_stream_linked(substream)) {
1670 list_del(&substream->link_list);
1671 substream->group->count--;
1672 if (substream->group->count == 1) { /* detach the last stream, too */
1673 snd_pcm_group_for_each_entry(s, substream) {
1677 kfree(substream->group);
1679 relink_to_local(substream);
1681 write_unlock_irq(&snd_pcm_link_rwlock);
1682 up_write(&snd_pcm_link_rwsem);
1689 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1690 struct snd_pcm_hw_rule *rule)
1692 struct snd_interval t;
1693 snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1694 hw_param_interval_c(params, rule->deps[1]), &t);
1695 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1698 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1699 struct snd_pcm_hw_rule *rule)
1701 struct snd_interval t;
1702 snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1703 hw_param_interval_c(params, rule->deps[1]), &t);
1704 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1707 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1708 struct snd_pcm_hw_rule *rule)
1710 struct snd_interval t;
1711 snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1712 hw_param_interval_c(params, rule->deps[1]),
1713 (unsigned long) rule->private, &t);
1714 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1717 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1718 struct snd_pcm_hw_rule *rule)
1720 struct snd_interval t;
1721 snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1722 (unsigned long) rule->private,
1723 hw_param_interval_c(params, rule->deps[1]), &t);
1724 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1727 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1728 struct snd_pcm_hw_rule *rule)
1731 struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1733 struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1735 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1737 if (! snd_mask_test(mask, k))
1739 bits = snd_pcm_format_physical_width(k);
1741 continue; /* ignore invalid formats */
1742 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1743 snd_mask_reset(&m, k);
1745 return snd_mask_refine(mask, &m);
1748 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1749 struct snd_pcm_hw_rule *rule)
1751 struct snd_interval t;
1757 for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1759 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1761 bits = snd_pcm_format_physical_width(k);
1763 continue; /* ignore invalid formats */
1764 if (t.min > (unsigned)bits)
1766 if (t.max < (unsigned)bits)
1770 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1773 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1774 #error "Change this table"
1777 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1778 48000, 64000, 88200, 96000, 176400, 192000 };
1780 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1781 .count = ARRAY_SIZE(rates),
1785 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1786 struct snd_pcm_hw_rule *rule)
1788 struct snd_pcm_hardware *hw = rule->private;
1789 return snd_interval_list(hw_param_interval(params, rule->var),
1790 snd_pcm_known_rates.count,
1791 snd_pcm_known_rates.list, hw->rates);
1794 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1795 struct snd_pcm_hw_rule *rule)
1797 struct snd_interval t;
1798 struct snd_pcm_substream *substream = rule->private;
1800 t.max = substream->buffer_bytes_max;
1804 return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1807 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1809 struct snd_pcm_runtime *runtime = substream->runtime;
1810 struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1813 for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1814 snd_mask_any(constrs_mask(constrs, k));
1817 for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1818 snd_interval_any(constrs_interval(constrs, k));
1821 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1822 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1823 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1824 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1825 snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1827 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1828 snd_pcm_hw_rule_format, NULL,
1829 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1832 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1833 snd_pcm_hw_rule_sample_bits, NULL,
1834 SNDRV_PCM_HW_PARAM_FORMAT,
1835 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1838 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1839 snd_pcm_hw_rule_div, NULL,
1840 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1843 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1844 snd_pcm_hw_rule_mul, NULL,
1845 SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1848 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1849 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1850 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1853 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1854 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1855 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1858 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1859 snd_pcm_hw_rule_div, NULL,
1860 SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1863 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1864 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1865 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1868 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1869 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1870 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1873 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1874 snd_pcm_hw_rule_div, NULL,
1875 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1878 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1879 snd_pcm_hw_rule_div, NULL,
1880 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1883 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1884 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1885 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1888 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1889 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1890 SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1893 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1894 snd_pcm_hw_rule_mul, NULL,
1895 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1898 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1899 snd_pcm_hw_rule_mulkdiv, (void*) 8,
1900 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1903 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1904 snd_pcm_hw_rule_muldivk, (void*) 1000000,
1905 SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1908 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1909 snd_pcm_hw_rule_muldivk, (void*) 8,
1910 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1913 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1914 snd_pcm_hw_rule_muldivk, (void*) 8,
1915 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1918 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1919 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1920 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1923 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1924 snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1925 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1931 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1933 struct snd_pcm_runtime *runtime = substream->runtime;
1934 struct snd_pcm_hardware *hw = &runtime->hw;
1936 unsigned int mask = 0;
1938 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1939 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1940 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1941 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1942 if (hw->info & SNDRV_PCM_INFO_MMAP) {
1943 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1944 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1945 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1946 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1947 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1948 mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1950 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1954 err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1958 err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1962 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1963 hw->channels_min, hw->channels_max);
1967 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1968 hw->rate_min, hw->rate_max);
1972 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1973 hw->period_bytes_min, hw->period_bytes_max);
1977 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1978 hw->periods_min, hw->periods_max);
1982 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1983 hw->period_bytes_min, hw->buffer_bytes_max);
1987 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1988 snd_pcm_hw_rule_buffer_bytes_max, substream,
1989 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1994 if (runtime->dma_bytes) {
1995 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
2000 if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
2001 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
2002 snd_pcm_hw_rule_rate, hw,
2003 SNDRV_PCM_HW_PARAM_RATE, -1);
2008 /* FIXME: this belong to lowlevel */
2009 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
2014 static void pcm_release_private(struct snd_pcm_substream *substream)
2016 snd_pcm_unlink(substream);
2019 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2021 substream->ref_count--;
2022 if (substream->ref_count > 0)
2025 snd_pcm_drop(substream);
2026 if (substream->hw_opened) {
2027 if (substream->ops->hw_free != NULL)
2028 substream->ops->hw_free(substream);
2029 substream->ops->close(substream);
2030 substream->hw_opened = 0;
2032 if (pm_qos_request_active(&substream->latency_pm_qos_req))
2033 pm_qos_remove_request(&substream->latency_pm_qos_req);
2034 if (substream->pcm_release) {
2035 substream->pcm_release(substream);
2036 substream->pcm_release = NULL;
2038 snd_pcm_detach_substream(substream);
2041 EXPORT_SYMBOL(snd_pcm_release_substream);
2043 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2045 struct snd_pcm_substream **rsubstream)
2047 struct snd_pcm_substream *substream;
2050 err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2053 if (substream->ref_count > 1) {
2054 *rsubstream = substream;
2058 err = snd_pcm_hw_constraints_init(substream);
2060 snd_printd("snd_pcm_hw_constraints_init failed\n");
2064 if ((err = substream->ops->open(substream)) < 0)
2067 substream->hw_opened = 1;
2069 err = snd_pcm_hw_constraints_complete(substream);
2071 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2075 *rsubstream = substream;
2079 snd_pcm_release_substream(substream);
2083 EXPORT_SYMBOL(snd_pcm_open_substream);
2085 static int snd_pcm_open_file(struct file *file,
2086 struct snd_pcm *pcm,
2089 struct snd_pcm_file *pcm_file;
2090 struct snd_pcm_substream *substream;
2093 err = snd_pcm_open_substream(pcm, stream, file, &substream);
2097 pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2098 if (pcm_file == NULL) {
2099 snd_pcm_release_substream(substream);
2102 pcm_file->substream = substream;
2103 if (substream->ref_count == 1) {
2104 substream->file = pcm_file;
2105 substream->pcm_release = pcm_release_private;
2107 file->private_data = pcm_file;
2112 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2114 struct snd_pcm *pcm;
2115 int err = nonseekable_open(inode, file);
2118 pcm = snd_lookup_minor_data(iminor(inode),
2119 SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2120 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2121 snd_card_unref(pcm->card);
2125 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2127 struct snd_pcm *pcm;
2128 int err = nonseekable_open(inode, file);
2131 pcm = snd_lookup_minor_data(iminor(inode),
2132 SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2133 err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2134 snd_card_unref(pcm->card);
2138 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2147 err = snd_card_file_add(pcm->card, file);
2150 if (!try_module_get(pcm->card->module)) {
2154 init_waitqueue_entry(&wait, current);
2155 add_wait_queue(&pcm->open_wait, &wait);
2156 mutex_lock(&pcm->open_mutex);
2158 err = snd_pcm_open_file(file, pcm, stream);
2161 if (err == -EAGAIN) {
2162 if (file->f_flags & O_NONBLOCK) {
2168 set_current_state(TASK_INTERRUPTIBLE);
2169 mutex_unlock(&pcm->open_mutex);
2171 mutex_lock(&pcm->open_mutex);
2172 if (signal_pending(current)) {
2177 remove_wait_queue(&pcm->open_wait, &wait);
2178 mutex_unlock(&pcm->open_mutex);
2184 module_put(pcm->card->module);
2186 snd_card_file_remove(pcm->card, file);
2191 static int snd_pcm_release(struct inode *inode, struct file *file)
2193 struct snd_pcm *pcm;
2194 struct snd_pcm_substream *substream;
2195 struct snd_pcm_file *pcm_file;
2197 pcm_file = file->private_data;
2198 substream = pcm_file->substream;
2199 if (snd_BUG_ON(!substream))
2201 pcm = substream->pcm;
2202 mutex_lock(&pcm->open_mutex);
2203 snd_pcm_release_substream(substream);
2205 mutex_unlock(&pcm->open_mutex);
2206 wake_up(&pcm->open_wait);
2207 module_put(pcm->card->module);
2208 snd_card_file_remove(pcm->card, file);
2212 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2213 snd_pcm_uframes_t frames)
2215 struct snd_pcm_runtime *runtime = substream->runtime;
2216 snd_pcm_sframes_t appl_ptr;
2217 snd_pcm_sframes_t ret;
2218 snd_pcm_sframes_t hw_avail;
2223 snd_pcm_stream_lock_irq(substream);
2224 switch (runtime->status->state) {
2225 case SNDRV_PCM_STATE_PREPARED:
2227 case SNDRV_PCM_STATE_DRAINING:
2228 case SNDRV_PCM_STATE_RUNNING:
2229 if (snd_pcm_update_hw_ptr(substream) >= 0)
2232 case SNDRV_PCM_STATE_XRUN:
2235 case SNDRV_PCM_STATE_SUSPENDED:
2243 hw_avail = snd_pcm_playback_hw_avail(runtime);
2244 if (hw_avail <= 0) {
2248 if (frames > (snd_pcm_uframes_t)hw_avail)
2250 appl_ptr = runtime->control->appl_ptr - frames;
2252 appl_ptr += runtime->boundary;
2253 runtime->control->appl_ptr = appl_ptr;
2256 snd_pcm_stream_unlock_irq(substream);
2260 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2261 snd_pcm_uframes_t frames)
2263 struct snd_pcm_runtime *runtime = substream->runtime;
2264 snd_pcm_sframes_t appl_ptr;
2265 snd_pcm_sframes_t ret;
2266 snd_pcm_sframes_t hw_avail;
2271 snd_pcm_stream_lock_irq(substream);
2272 switch (runtime->status->state) {
2273 case SNDRV_PCM_STATE_PREPARED:
2274 case SNDRV_PCM_STATE_DRAINING:
2276 case SNDRV_PCM_STATE_RUNNING:
2277 if (snd_pcm_update_hw_ptr(substream) >= 0)
2280 case SNDRV_PCM_STATE_XRUN:
2283 case SNDRV_PCM_STATE_SUSPENDED:
2291 hw_avail = snd_pcm_capture_hw_avail(runtime);
2292 if (hw_avail <= 0) {
2296 if (frames > (snd_pcm_uframes_t)hw_avail)
2298 appl_ptr = runtime->control->appl_ptr - frames;
2300 appl_ptr += runtime->boundary;
2301 runtime->control->appl_ptr = appl_ptr;
2304 snd_pcm_stream_unlock_irq(substream);
2308 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2309 snd_pcm_uframes_t frames)
2311 struct snd_pcm_runtime *runtime = substream->runtime;
2312 snd_pcm_sframes_t appl_ptr;
2313 snd_pcm_sframes_t ret;
2314 snd_pcm_sframes_t avail;
2319 snd_pcm_stream_lock_irq(substream);
2320 switch (runtime->status->state) {
2321 case SNDRV_PCM_STATE_PREPARED:
2322 case SNDRV_PCM_STATE_PAUSED:
2324 case SNDRV_PCM_STATE_DRAINING:
2325 case SNDRV_PCM_STATE_RUNNING:
2326 if (snd_pcm_update_hw_ptr(substream) >= 0)
2329 case SNDRV_PCM_STATE_XRUN:
2332 case SNDRV_PCM_STATE_SUSPENDED:
2340 avail = snd_pcm_playback_avail(runtime);
2345 if (frames > (snd_pcm_uframes_t)avail)
2347 appl_ptr = runtime->control->appl_ptr + frames;
2348 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2349 appl_ptr -= runtime->boundary;
2350 runtime->control->appl_ptr = appl_ptr;
2353 snd_pcm_stream_unlock_irq(substream);
2357 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2358 snd_pcm_uframes_t frames)
2360 struct snd_pcm_runtime *runtime = substream->runtime;
2361 snd_pcm_sframes_t appl_ptr;
2362 snd_pcm_sframes_t ret;
2363 snd_pcm_sframes_t avail;
2368 snd_pcm_stream_lock_irq(substream);
2369 switch (runtime->status->state) {
2370 case SNDRV_PCM_STATE_PREPARED:
2371 case SNDRV_PCM_STATE_DRAINING:
2372 case SNDRV_PCM_STATE_PAUSED:
2374 case SNDRV_PCM_STATE_RUNNING:
2375 if (snd_pcm_update_hw_ptr(substream) >= 0)
2378 case SNDRV_PCM_STATE_XRUN:
2381 case SNDRV_PCM_STATE_SUSPENDED:
2389 avail = snd_pcm_capture_avail(runtime);
2394 if (frames > (snd_pcm_uframes_t)avail)
2396 appl_ptr = runtime->control->appl_ptr + frames;
2397 if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2398 appl_ptr -= runtime->boundary;
2399 runtime->control->appl_ptr = appl_ptr;
2402 snd_pcm_stream_unlock_irq(substream);
2406 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2408 struct snd_pcm_runtime *runtime = substream->runtime;
2411 snd_pcm_stream_lock_irq(substream);
2412 switch (runtime->status->state) {
2413 case SNDRV_PCM_STATE_DRAINING:
2414 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2416 case SNDRV_PCM_STATE_RUNNING:
2417 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2420 case SNDRV_PCM_STATE_PREPARED:
2421 case SNDRV_PCM_STATE_SUSPENDED:
2424 case SNDRV_PCM_STATE_XRUN:
2432 snd_pcm_stream_unlock_irq(substream);
2436 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2437 snd_pcm_sframes_t __user *res)
2439 struct snd_pcm_runtime *runtime = substream->runtime;
2441 snd_pcm_sframes_t n = 0;
2443 snd_pcm_stream_lock_irq(substream);
2444 switch (runtime->status->state) {
2445 case SNDRV_PCM_STATE_DRAINING:
2446 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2448 case SNDRV_PCM_STATE_RUNNING:
2449 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2452 case SNDRV_PCM_STATE_PREPARED:
2453 case SNDRV_PCM_STATE_SUSPENDED:
2455 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2456 n = snd_pcm_playback_hw_avail(runtime);
2458 n = snd_pcm_capture_avail(runtime);
2459 n += runtime->delay;
2461 case SNDRV_PCM_STATE_XRUN:
2469 snd_pcm_stream_unlock_irq(substream);
2471 if (put_user(n, res))
2476 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2477 struct snd_pcm_sync_ptr __user *_sync_ptr)
2479 struct snd_pcm_runtime *runtime = substream->runtime;
2480 struct snd_pcm_sync_ptr sync_ptr;
2481 volatile struct snd_pcm_mmap_status *status;
2482 volatile struct snd_pcm_mmap_control *control;
2485 memset(&sync_ptr, 0, sizeof(sync_ptr));
2486 if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2488 if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2490 status = runtime->status;
2491 control = runtime->control;
2492 if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2493 err = snd_pcm_hwsync(substream);
2497 snd_pcm_stream_lock_irq(substream);
2498 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2499 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2501 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2502 if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2503 control->avail_min = sync_ptr.c.control.avail_min;
2505 sync_ptr.c.control.avail_min = control->avail_min;
2506 sync_ptr.s.status.state = status->state;
2507 sync_ptr.s.status.hw_ptr = status->hw_ptr;
2508 sync_ptr.s.status.tstamp = status->tstamp;
2509 sync_ptr.s.status.suspended_state = status->suspended_state;
2510 snd_pcm_stream_unlock_irq(substream);
2511 if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2516 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2518 struct snd_pcm_runtime *runtime = substream->runtime;
2521 if (get_user(arg, _arg))
2523 if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2525 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2526 if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2527 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2531 static int snd_pcm_common_ioctl1(struct file *file,
2532 struct snd_pcm_substream *substream,
2533 unsigned int cmd, void __user *arg)
2536 case SNDRV_PCM_IOCTL_PVERSION:
2537 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2538 case SNDRV_PCM_IOCTL_INFO:
2539 return snd_pcm_info_user(substream, arg);
2540 case SNDRV_PCM_IOCTL_TSTAMP: /* just for compatibility */
2542 case SNDRV_PCM_IOCTL_TTSTAMP:
2543 return snd_pcm_tstamp(substream, arg);
2544 case SNDRV_PCM_IOCTL_HW_REFINE:
2545 return snd_pcm_hw_refine_user(substream, arg);
2546 case SNDRV_PCM_IOCTL_HW_PARAMS:
2547 return snd_pcm_hw_params_user(substream, arg);
2548 case SNDRV_PCM_IOCTL_HW_FREE:
2549 return snd_pcm_hw_free(substream);
2550 case SNDRV_PCM_IOCTL_SW_PARAMS:
2551 return snd_pcm_sw_params_user(substream, arg);
2552 case SNDRV_PCM_IOCTL_STATUS:
2553 return snd_pcm_status_user(substream, arg);
2554 case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2555 return snd_pcm_channel_info_user(substream, arg);
2556 case SNDRV_PCM_IOCTL_PREPARE:
2557 return snd_pcm_prepare(substream, file);
2558 case SNDRV_PCM_IOCTL_RESET:
2559 return snd_pcm_reset(substream);
2560 case SNDRV_PCM_IOCTL_START:
2561 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2562 case SNDRV_PCM_IOCTL_LINK:
2563 return snd_pcm_link(substream, (int)(unsigned long) arg);
2564 case SNDRV_PCM_IOCTL_UNLINK:
2565 return snd_pcm_unlink(substream);
2566 case SNDRV_PCM_IOCTL_RESUME:
2567 return snd_pcm_resume(substream);
2568 case SNDRV_PCM_IOCTL_XRUN:
2569 return snd_pcm_xrun(substream);
2570 case SNDRV_PCM_IOCTL_HWSYNC:
2571 return snd_pcm_hwsync(substream);
2572 case SNDRV_PCM_IOCTL_DELAY:
2573 return snd_pcm_delay(substream, arg);
2574 case SNDRV_PCM_IOCTL_SYNC_PTR:
2575 return snd_pcm_sync_ptr(substream, arg);
2576 #ifdef CONFIG_SND_SUPPORT_OLD_API
2577 case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2578 return snd_pcm_hw_refine_old_user(substream, arg);
2579 case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2580 return snd_pcm_hw_params_old_user(substream, arg);
2582 case SNDRV_PCM_IOCTL_DRAIN:
2583 return snd_pcm_drain(substream, file);
2584 case SNDRV_PCM_IOCTL_DROP:
2585 return snd_pcm_drop(substream);
2586 case SNDRV_PCM_IOCTL_PAUSE:
2589 snd_pcm_stream_lock_irq(substream);
2590 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2591 snd_pcm_stream_unlock_irq(substream);
2595 snd_printd("unknown ioctl = 0x%x\n", cmd);
2599 static int snd_pcm_playback_ioctl1(struct file *file,
2600 struct snd_pcm_substream *substream,
2601 unsigned int cmd, void __user *arg)
2603 if (snd_BUG_ON(!substream))
2605 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2608 case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2610 struct snd_xferi xferi;
2611 struct snd_xferi __user *_xferi = arg;
2612 struct snd_pcm_runtime *runtime = substream->runtime;
2613 snd_pcm_sframes_t result;
2614 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2616 if (put_user(0, &_xferi->result))
2618 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2620 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2621 __put_user(result, &_xferi->result);
2622 return result < 0 ? result : 0;
2624 case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2626 struct snd_xfern xfern;
2627 struct snd_xfern __user *_xfern = arg;
2628 struct snd_pcm_runtime *runtime = substream->runtime;
2630 snd_pcm_sframes_t result;
2631 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2633 if (runtime->channels > 128)
2635 if (put_user(0, &_xfern->result))
2637 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2640 bufs = memdup_user(xfern.bufs,
2641 sizeof(void *) * runtime->channels);
2643 return PTR_ERR(bufs);
2644 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2646 __put_user(result, &_xfern->result);
2647 return result < 0 ? result : 0;
2649 case SNDRV_PCM_IOCTL_REWIND:
2651 snd_pcm_uframes_t frames;
2652 snd_pcm_uframes_t __user *_frames = arg;
2653 snd_pcm_sframes_t result;
2654 if (get_user(frames, _frames))
2656 if (put_user(0, _frames))
2658 result = snd_pcm_playback_rewind(substream, frames);
2659 __put_user(result, _frames);
2660 return result < 0 ? result : 0;
2662 case SNDRV_PCM_IOCTL_FORWARD:
2664 snd_pcm_uframes_t frames;
2665 snd_pcm_uframes_t __user *_frames = arg;
2666 snd_pcm_sframes_t result;
2667 if (get_user(frames, _frames))
2669 if (put_user(0, _frames))
2671 result = snd_pcm_playback_forward(substream, frames);
2672 __put_user(result, _frames);
2673 return result < 0 ? result : 0;
2676 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2679 static int snd_pcm_capture_ioctl1(struct file *file,
2680 struct snd_pcm_substream *substream,
2681 unsigned int cmd, void __user *arg)
2683 if (snd_BUG_ON(!substream))
2685 if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2688 case SNDRV_PCM_IOCTL_READI_FRAMES:
2690 struct snd_xferi xferi;
2691 struct snd_xferi __user *_xferi = arg;
2692 struct snd_pcm_runtime *runtime = substream->runtime;
2693 snd_pcm_sframes_t result;
2694 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2696 if (put_user(0, &_xferi->result))
2698 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2700 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2701 __put_user(result, &_xferi->result);
2702 return result < 0 ? result : 0;
2704 case SNDRV_PCM_IOCTL_READN_FRAMES:
2706 struct snd_xfern xfern;
2707 struct snd_xfern __user *_xfern = arg;
2708 struct snd_pcm_runtime *runtime = substream->runtime;
2710 snd_pcm_sframes_t result;
2711 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2713 if (runtime->channels > 128)
2715 if (put_user(0, &_xfern->result))
2717 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2720 bufs = memdup_user(xfern.bufs,
2721 sizeof(void *) * runtime->channels);
2723 return PTR_ERR(bufs);
2724 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2726 __put_user(result, &_xfern->result);
2727 return result < 0 ? result : 0;
2729 case SNDRV_PCM_IOCTL_REWIND:
2731 snd_pcm_uframes_t frames;
2732 snd_pcm_uframes_t __user *_frames = arg;
2733 snd_pcm_sframes_t result;
2734 if (get_user(frames, _frames))
2736 if (put_user(0, _frames))
2738 result = snd_pcm_capture_rewind(substream, frames);
2739 __put_user(result, _frames);
2740 return result < 0 ? result : 0;
2742 case SNDRV_PCM_IOCTL_FORWARD:
2744 snd_pcm_uframes_t frames;
2745 snd_pcm_uframes_t __user *_frames = arg;
2746 snd_pcm_sframes_t result;
2747 if (get_user(frames, _frames))
2749 if (put_user(0, _frames))
2751 result = snd_pcm_capture_forward(substream, frames);
2752 __put_user(result, _frames);
2753 return result < 0 ? result : 0;
2756 return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2759 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2762 struct snd_pcm_file *pcm_file;
2764 pcm_file = file->private_data;
2766 if (((cmd >> 8) & 0xff) != 'A')
2769 return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2770 (void __user *)arg);
2773 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2776 struct snd_pcm_file *pcm_file;
2778 pcm_file = file->private_data;
2780 if (((cmd >> 8) & 0xff) != 'A')
2783 return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2784 (void __user *)arg);
2787 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2788 unsigned int cmd, void *arg)
2793 fs = snd_enter_user();
2794 switch (substream->stream) {
2795 case SNDRV_PCM_STREAM_PLAYBACK:
2796 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2797 (void __user *)arg);
2799 case SNDRV_PCM_STREAM_CAPTURE:
2800 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2801 (void __user *)arg);
2811 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2813 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2816 struct snd_pcm_file *pcm_file;
2817 struct snd_pcm_substream *substream;
2818 struct snd_pcm_runtime *runtime;
2819 snd_pcm_sframes_t result;
2821 pcm_file = file->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 (!frame_aligned(runtime, count))
2830 count = bytes_to_frames(runtime, count);
2831 result = snd_pcm_lib_read(substream, buf, count);
2833 result = frames_to_bytes(runtime, result);
2837 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2838 size_t count, loff_t * offset)
2840 struct snd_pcm_file *pcm_file;
2841 struct snd_pcm_substream *substream;
2842 struct snd_pcm_runtime *runtime;
2843 snd_pcm_sframes_t result;
2845 pcm_file = file->private_data;
2846 substream = pcm_file->substream;
2847 if (PCM_RUNTIME_CHECK(substream))
2849 runtime = substream->runtime;
2850 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2852 if (!frame_aligned(runtime, count))
2854 count = bytes_to_frames(runtime, count);
2855 result = snd_pcm_lib_write(substream, buf, count);
2857 result = frames_to_bytes(runtime, result);
2861 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2862 unsigned long nr_segs, loff_t pos)
2865 struct snd_pcm_file *pcm_file;
2866 struct snd_pcm_substream *substream;
2867 struct snd_pcm_runtime *runtime;
2868 snd_pcm_sframes_t result;
2871 snd_pcm_uframes_t frames;
2873 pcm_file = iocb->ki_filp->private_data;
2874 substream = pcm_file->substream;
2875 if (PCM_RUNTIME_CHECK(substream))
2877 runtime = substream->runtime;
2878 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2880 if (nr_segs > 1024 || nr_segs != runtime->channels)
2882 if (!frame_aligned(runtime, iov->iov_len))
2884 frames = bytes_to_samples(runtime, iov->iov_len);
2885 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2888 for (i = 0; i < nr_segs; ++i)
2889 bufs[i] = iov[i].iov_base;
2890 result = snd_pcm_lib_readv(substream, bufs, frames);
2892 result = frames_to_bytes(runtime, result);
2897 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2898 unsigned long nr_segs, loff_t pos)
2900 struct snd_pcm_file *pcm_file;
2901 struct snd_pcm_substream *substream;
2902 struct snd_pcm_runtime *runtime;
2903 snd_pcm_sframes_t result;
2906 snd_pcm_uframes_t frames;
2908 pcm_file = iocb->ki_filp->private_data;
2909 substream = pcm_file->substream;
2910 if (PCM_RUNTIME_CHECK(substream))
2912 runtime = substream->runtime;
2913 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2915 if (nr_segs > 128 || nr_segs != runtime->channels ||
2916 !frame_aligned(runtime, iov->iov_len))
2918 frames = bytes_to_samples(runtime, iov->iov_len);
2919 bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2922 for (i = 0; i < nr_segs; ++i)
2923 bufs[i] = iov[i].iov_base;
2924 result = snd_pcm_lib_writev(substream, bufs, frames);
2926 result = frames_to_bytes(runtime, result);
2931 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2933 struct snd_pcm_file *pcm_file;
2934 struct snd_pcm_substream *substream;
2935 struct snd_pcm_runtime *runtime;
2937 snd_pcm_uframes_t avail;
2939 pcm_file = file->private_data;
2941 substream = pcm_file->substream;
2942 if (PCM_RUNTIME_CHECK(substream))
2944 runtime = substream->runtime;
2946 poll_wait(file, &runtime->sleep, wait);
2948 snd_pcm_stream_lock_irq(substream);
2949 avail = snd_pcm_playback_avail(runtime);
2950 switch (runtime->status->state) {
2951 case SNDRV_PCM_STATE_RUNNING:
2952 case SNDRV_PCM_STATE_PREPARED:
2953 case SNDRV_PCM_STATE_PAUSED:
2954 if (avail >= runtime->control->avail_min) {
2955 mask = POLLOUT | POLLWRNORM;
2959 case SNDRV_PCM_STATE_DRAINING:
2963 mask = POLLOUT | POLLWRNORM | POLLERR;
2966 snd_pcm_stream_unlock_irq(substream);
2970 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2972 struct snd_pcm_file *pcm_file;
2973 struct snd_pcm_substream *substream;
2974 struct snd_pcm_runtime *runtime;
2976 snd_pcm_uframes_t avail;
2978 pcm_file = file->private_data;
2980 substream = pcm_file->substream;
2981 if (PCM_RUNTIME_CHECK(substream))
2983 runtime = substream->runtime;
2985 poll_wait(file, &runtime->sleep, wait);
2987 snd_pcm_stream_lock_irq(substream);
2988 avail = snd_pcm_capture_avail(runtime);
2989 switch (runtime->status->state) {
2990 case SNDRV_PCM_STATE_RUNNING:
2991 case SNDRV_PCM_STATE_PREPARED:
2992 case SNDRV_PCM_STATE_PAUSED:
2993 if (avail >= runtime->control->avail_min) {
2994 mask = POLLIN | POLLRDNORM;
2999 case SNDRV_PCM_STATE_DRAINING:
3001 mask = POLLIN | POLLRDNORM;
3006 mask = POLLIN | POLLRDNORM | POLLERR;
3009 snd_pcm_stream_unlock_irq(substream);
3018 * Only on coherent architectures, we can mmap the status and the control records
3019 * for effcient data transfer. On others, we have to use HWSYNC ioctl...
3021 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3023 * mmap status record
3025 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3026 struct vm_fault *vmf)
3028 struct snd_pcm_substream *substream = area->vm_private_data;
3029 struct snd_pcm_runtime *runtime;
3031 if (substream == NULL)
3032 return VM_FAULT_SIGBUS;
3033 runtime = substream->runtime;
3034 vmf->page = virt_to_page(runtime->status);
3035 get_page(vmf->page);
3039 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3041 .fault = snd_pcm_mmap_status_fault,
3044 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3045 struct vm_area_struct *area)
3048 if (!(area->vm_flags & VM_READ))
3050 size = area->vm_end - area->vm_start;
3051 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3053 area->vm_ops = &snd_pcm_vm_ops_status;
3054 area->vm_private_data = substream;
3055 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3060 * mmap control record
3062 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3063 struct vm_fault *vmf)
3065 struct snd_pcm_substream *substream = area->vm_private_data;
3066 struct snd_pcm_runtime *runtime;
3068 if (substream == NULL)
3069 return VM_FAULT_SIGBUS;
3070 runtime = substream->runtime;
3071 vmf->page = virt_to_page(runtime->control);
3072 get_page(vmf->page);
3076 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3078 .fault = snd_pcm_mmap_control_fault,
3081 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3082 struct vm_area_struct *area)
3085 if (!(area->vm_flags & VM_READ))
3087 size = area->vm_end - area->vm_start;
3088 if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3090 area->vm_ops = &snd_pcm_vm_ops_control;
3091 area->vm_private_data = substream;
3092 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3095 #else /* ! coherent mmap */
3097 * don't support mmap for status and control records.
3099 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3100 struct vm_area_struct *area)
3104 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3105 struct vm_area_struct *area)
3109 #endif /* coherent mmap */
3111 static inline struct page *
3112 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3114 void *vaddr = substream->runtime->dma_area + ofs;
3115 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3116 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3117 return virt_to_page(CAC_ADDR(vaddr));
3119 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3120 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3121 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3122 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3123 /* assume dma_handle set via pfn_to_phys() in
3124 * mm/dma-noncoherent.c
3126 return pfn_to_page(addr >> PAGE_SHIFT);
3129 return virt_to_page(vaddr);
3133 * fault callback for mmapping a RAM page
3135 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3136 struct vm_fault *vmf)
3138 struct snd_pcm_substream *substream = area->vm_private_data;
3139 struct snd_pcm_runtime *runtime;
3140 unsigned long offset;
3144 if (substream == NULL)
3145 return VM_FAULT_SIGBUS;
3146 runtime = substream->runtime;
3147 offset = vmf->pgoff << PAGE_SHIFT;
3148 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3149 if (offset > dma_bytes - PAGE_SIZE)
3150 return VM_FAULT_SIGBUS;
3151 if (substream->ops->page)
3152 page = substream->ops->page(substream, offset);
3154 page = snd_pcm_default_page_ops(substream, offset);
3156 return VM_FAULT_SIGBUS;
3162 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3163 .open = snd_pcm_mmap_data_open,
3164 .close = snd_pcm_mmap_data_close,
3167 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3168 .open = snd_pcm_mmap_data_open,
3169 .close = snd_pcm_mmap_data_close,
3170 .fault = snd_pcm_mmap_data_fault,
3173 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3174 /* This should be defined / handled globally! */
3176 #define ARCH_HAS_DMA_MMAP_COHERENT
3181 * mmap the DMA buffer on RAM
3183 int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
3184 struct vm_area_struct *area)
3186 area->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
3187 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3188 if (!substream->ops->page &&
3189 substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3190 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3192 substream->runtime->dma_area,
3193 substream->runtime->dma_addr,
3194 area->vm_end - area->vm_start);
3195 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3196 if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3197 !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3198 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3199 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3200 /* mmap with fault handler */
3201 area->vm_ops = &snd_pcm_vm_ops_data_fault;
3204 EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap);
3207 * mmap the DMA buffer on I/O memory area
3209 #if SNDRV_PCM_INFO_MMAP_IOMEM
3210 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3211 struct vm_area_struct *area)
3214 unsigned long offset;
3216 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3217 area->vm_flags |= VM_IO;
3218 size = area->vm_end - area->vm_start;
3219 offset = area->vm_pgoff << PAGE_SHIFT;
3220 if (io_remap_pfn_range(area, area->vm_start,
3221 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3222 size, area->vm_page_prot))
3227 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3228 #endif /* SNDRV_PCM_INFO_MMAP */
3233 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3234 struct vm_area_struct *area)
3236 struct snd_pcm_runtime *runtime;
3238 unsigned long offset;
3242 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3243 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3246 if (!(area->vm_flags & VM_READ))
3249 runtime = substream->runtime;
3250 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3252 if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3254 if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3255 runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3257 size = area->vm_end - area->vm_start;
3258 offset = area->vm_pgoff << PAGE_SHIFT;
3259 dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3260 if ((size_t)size > dma_bytes)
3262 if (offset > dma_bytes - size)
3265 area->vm_ops = &snd_pcm_vm_ops_data;
3266 area->vm_private_data = substream;
3267 if (substream->ops->mmap)
3268 err = substream->ops->mmap(substream, area);
3270 err = snd_pcm_lib_default_mmap(substream, area);
3272 atomic_inc(&substream->mmap_count);
3276 EXPORT_SYMBOL(snd_pcm_mmap_data);
3278 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3280 struct snd_pcm_file * pcm_file;
3281 struct snd_pcm_substream *substream;
3282 unsigned long offset;
3284 pcm_file = file->private_data;
3285 substream = pcm_file->substream;
3286 if (PCM_RUNTIME_CHECK(substream))
3289 offset = area->vm_pgoff << PAGE_SHIFT;
3291 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3292 if (pcm_file->no_compat_mmap)
3294 return snd_pcm_mmap_status(substream, file, area);
3295 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3296 if (pcm_file->no_compat_mmap)
3298 return snd_pcm_mmap_control(substream, file, area);
3300 return snd_pcm_mmap_data(substream, file, area);
3305 static int snd_pcm_fasync(int fd, struct file * file, int on)
3307 struct snd_pcm_file * pcm_file;
3308 struct snd_pcm_substream *substream;
3309 struct snd_pcm_runtime *runtime;
3311 pcm_file = file->private_data;
3312 substream = pcm_file->substream;
3313 if (PCM_RUNTIME_CHECK(substream))
3315 runtime = substream->runtime;
3316 return fasync_helper(fd, file, on, &runtime->fasync);
3322 #ifdef CONFIG_COMPAT
3323 #include "pcm_compat.c"
3325 #define snd_pcm_ioctl_compat NULL
3329 * To be removed helpers to keep binary compatibility
3332 #ifdef CONFIG_SND_SUPPORT_OLD_API
3333 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3334 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3336 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3337 struct snd_pcm_hw_params_old *oparams)
3341 memset(params, 0, sizeof(*params));
3342 params->flags = oparams->flags;
3343 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3344 params->masks[i].bits[0] = oparams->masks[i];
3345 memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3346 params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3347 params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3348 params->info = oparams->info;
3349 params->msbits = oparams->msbits;
3350 params->rate_num = oparams->rate_num;
3351 params->rate_den = oparams->rate_den;
3352 params->fifo_size = oparams->fifo_size;
3355 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3356 struct snd_pcm_hw_params *params)
3360 memset(oparams, 0, sizeof(*oparams));
3361 oparams->flags = params->flags;
3362 for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3363 oparams->masks[i] = params->masks[i].bits[0];
3364 memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3365 oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3366 oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3367 oparams->info = params->info;
3368 oparams->msbits = params->msbits;
3369 oparams->rate_num = params->rate_num;
3370 oparams->rate_den = params->rate_den;
3371 oparams->fifo_size = params->fifo_size;
3374 static int snd_pcm_hw_refine_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_refine(substream, params);
3392 snd_pcm_hw_convert_to_old_params(oparams, params);
3393 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3404 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3405 struct snd_pcm_hw_params_old __user * _oparams)
3407 struct snd_pcm_hw_params *params;
3408 struct snd_pcm_hw_params_old *oparams = NULL;
3411 params = kmalloc(sizeof(*params), GFP_KERNEL);
3415 oparams = memdup_user(_oparams, sizeof(*oparams));
3416 if (IS_ERR(oparams)) {
3417 err = PTR_ERR(oparams);
3420 snd_pcm_hw_convert_from_old_params(params, oparams);
3421 err = snd_pcm_hw_params(substream, params);
3422 snd_pcm_hw_convert_to_old_params(oparams, params);
3423 if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3433 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3436 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3439 unsigned long pgoff,
3440 unsigned long flags)
3442 struct snd_pcm_file *pcm_file = file->private_data;
3443 struct snd_pcm_substream *substream = pcm_file->substream;
3444 struct snd_pcm_runtime *runtime = substream->runtime;
3445 unsigned long offset = pgoff << PAGE_SHIFT;
3448 case SNDRV_PCM_MMAP_OFFSET_STATUS:
3449 return (unsigned long)runtime->status;
3450 case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3451 return (unsigned long)runtime->control;
3453 return (unsigned long)runtime->dma_area + offset;
3457 # define snd_pcm_get_unmapped_area NULL
3464 const struct file_operations snd_pcm_f_ops[2] = {
3466 .owner = THIS_MODULE,
3467 .write = snd_pcm_write,
3468 .aio_write = snd_pcm_aio_write,
3469 .open = snd_pcm_playback_open,
3470 .release = snd_pcm_release,
3471 .llseek = no_llseek,
3472 .poll = snd_pcm_playback_poll,
3473 .unlocked_ioctl = snd_pcm_playback_ioctl,
3474 .compat_ioctl = snd_pcm_ioctl_compat,
3475 .mmap = snd_pcm_mmap,
3476 .fasync = snd_pcm_fasync,
3477 .get_unmapped_area = snd_pcm_get_unmapped_area,
3480 .owner = THIS_MODULE,
3481 .read = snd_pcm_read,
3482 .aio_read = snd_pcm_aio_read,
3483 .open = snd_pcm_capture_open,
3484 .release = snd_pcm_release,
3485 .llseek = no_llseek,
3486 .poll = snd_pcm_capture_poll,
3487 .unlocked_ioctl = snd_pcm_capture_ioctl,
3488 .compat_ioctl = snd_pcm_ioctl_compat,
3489 .mmap = snd_pcm_mmap,
3490 .fasync = snd_pcm_fasync,
3491 .get_unmapped_area = snd_pcm_get_unmapped_area,