2 * soc-core.c -- ALSA SoC Audio Layer
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
9 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 * with code, comments and ideas from :-
11 * Richard Purdie <richard@openedhand.com>
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
19 * o Add hw rules to enforce rates, etc.
20 * o More testing with other codecs/machines.
21 * o Add more codecs and platforms to ensure good API coverage.
22 * o Support TDM on PCM and I2S
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/init.h>
28 #include <linux/delay.h>
30 #include <linux/bitops.h>
31 #include <linux/debugfs.h>
32 #include <linux/platform_device.h>
33 #include <linux/pinctrl/consumer.h>
34 #include <linux/ctype.h>
35 #include <linux/slab.h>
37 #include <sound/core.h>
38 #include <sound/jack.h>
39 #include <sound/pcm.h>
40 #include <sound/pcm_params.h>
41 #include <sound/soc.h>
42 #include <sound/soc-dpcm.h>
43 #include <sound/initval.h>
45 #define CREATE_TRACE_POINTS
46 #include <trace/events/asoc.h>
50 #ifdef CONFIG_DEBUG_FS
51 struct dentry *snd_soc_debugfs_root;
52 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
55 static DEFINE_MUTEX(client_mutex);
56 static LIST_HEAD(platform_list);
57 static LIST_HEAD(codec_list);
58 static LIST_HEAD(component_list);
61 * This is a timeout to do a DAPM powerdown after a stream is closed().
62 * It can be used to eliminate pops between different playback streams, e.g.
63 * between two audio tracks.
65 static int pmdown_time = 5000;
66 module_param(pmdown_time, int, 0);
67 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
69 /* returns the minimum number of bytes needed to represent
70 * a particular given value */
71 static int min_bytes_needed(unsigned long val)
76 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
79 c = (sizeof val * 8) - c;
87 /* fill buf which is 'len' bytes with a formatted
88 * string of the form 'reg: value\n' */
89 static int format_register_str(struct snd_soc_codec *codec,
90 unsigned int reg, char *buf, size_t len)
92 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
93 int regsize = codec->driver->reg_word_size * 2;
96 char regbuf[regsize + 1];
98 /* since tmpbuf is allocated on the stack, warn the callers if they
99 * try to abuse this function */
102 /* +2 for ': ' and + 1 for '\n' */
103 if (wordsize + regsize + 2 + 1 != len)
106 ret = snd_soc_read(codec, reg);
108 memset(regbuf, 'X', regsize);
109 regbuf[regsize] = '\0';
111 snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
114 /* prepare the buffer */
115 snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
116 /* copy it back to the caller without the '\0' */
117 memcpy(buf, tmpbuf, len);
122 /* codec register dump */
123 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
124 size_t count, loff_t pos)
127 int wordsize, regsize;
132 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
133 regsize = codec->driver->reg_word_size * 2;
135 len = wordsize + regsize + 2 + 1;
137 if (!codec->driver->reg_cache_size)
140 if (codec->driver->reg_cache_step)
141 step = codec->driver->reg_cache_step;
143 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
144 /* only support larger than PAGE_SIZE bytes debugfs
145 * entries for the default case */
147 if (total + len >= count - 1)
149 format_register_str(codec, i, buf + total, len);
155 total = min(total, count - 1);
160 static ssize_t codec_reg_show(struct device *dev,
161 struct device_attribute *attr, char *buf)
163 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
165 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
168 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
170 static ssize_t pmdown_time_show(struct device *dev,
171 struct device_attribute *attr, char *buf)
173 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
175 return sprintf(buf, "%ld\n", rtd->pmdown_time);
178 static ssize_t pmdown_time_set(struct device *dev,
179 struct device_attribute *attr,
180 const char *buf, size_t count)
182 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
185 ret = kstrtol(buf, 10, &rtd->pmdown_time);
192 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
194 static struct attribute *soc_dev_attrs[] = {
195 &dev_attr_codec_reg.attr,
196 &dev_attr_pmdown_time.attr,
200 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
201 struct attribute *attr, int idx)
203 struct device *dev = kobj_to_dev(kobj);
204 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
206 if (attr == &dev_attr_pmdown_time.attr)
207 return attr->mode; /* always visible */
208 return rtd->codec ? attr->mode : 0; /* enabled only with codec */
211 static const struct attribute_group soc_dapm_dev_group = {
212 .attrs = soc_dapm_dev_attrs,
213 .is_visible = soc_dev_attr_is_visible,
216 static const struct attribute_group soc_dev_roup = {
217 .attrs = soc_dev_attrs,
218 .is_visible = soc_dev_attr_is_visible,
221 static const struct attribute_group *soc_dev_attr_groups[] = {
227 #ifdef CONFIG_DEBUG_FS
228 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
229 size_t count, loff_t *ppos)
232 struct snd_soc_codec *codec = file->private_data;
235 if (*ppos < 0 || !count)
238 buf = kmalloc(count, GFP_KERNEL);
242 ret = soc_codec_reg_show(codec, buf, count, *ppos);
244 if (copy_to_user(user_buf, buf, ret)) {
255 static ssize_t codec_reg_write_file(struct file *file,
256 const char __user *user_buf, size_t count, loff_t *ppos)
261 unsigned long reg, value;
262 struct snd_soc_codec *codec = file->private_data;
265 buf_size = min(count, (sizeof(buf)-1));
266 if (copy_from_user(buf, user_buf, buf_size))
270 while (*start == ' ')
272 reg = simple_strtoul(start, &start, 16);
273 while (*start == ' ')
275 ret = kstrtoul(start, 16, &value);
279 /* Userspace has been fiddling around behind the kernel's back */
280 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
282 snd_soc_write(codec, reg, value);
286 static const struct file_operations codec_reg_fops = {
288 .read = codec_reg_read_file,
289 .write = codec_reg_write_file,
290 .llseek = default_llseek,
293 static void soc_init_component_debugfs(struct snd_soc_component *component)
295 if (component->debugfs_prefix) {
298 name = kasprintf(GFP_KERNEL, "%s:%s",
299 component->debugfs_prefix, component->name);
301 component->debugfs_root = debugfs_create_dir(name,
302 component->card->debugfs_card_root);
306 component->debugfs_root = debugfs_create_dir(component->name,
307 component->card->debugfs_card_root);
310 if (!component->debugfs_root) {
311 dev_warn(component->dev,
312 "ASoC: Failed to create component debugfs directory\n");
316 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
317 component->debugfs_root);
319 if (component->init_debugfs)
320 component->init_debugfs(component);
323 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
325 debugfs_remove_recursive(component->debugfs_root);
328 static void soc_init_codec_debugfs(struct snd_soc_component *component)
330 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
332 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
333 codec->component.debugfs_root,
334 codec, &codec_reg_fops);
335 if (!codec->debugfs_reg)
337 "ASoC: Failed to create codec register debugfs file\n");
340 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
341 size_t count, loff_t *ppos)
343 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
344 ssize_t len, ret = 0;
345 struct snd_soc_codec *codec;
350 mutex_lock(&client_mutex);
352 list_for_each_entry(codec, &codec_list, list) {
353 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
354 codec->component.name);
357 if (ret > PAGE_SIZE) {
363 mutex_unlock(&client_mutex);
366 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
373 static const struct file_operations codec_list_fops = {
374 .read = codec_list_read_file,
375 .llseek = default_llseek,/* read accesses f_pos */
378 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
379 size_t count, loff_t *ppos)
381 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
382 ssize_t len, ret = 0;
383 struct snd_soc_component *component;
384 struct snd_soc_dai *dai;
389 mutex_lock(&client_mutex);
391 list_for_each_entry(component, &component_list, list) {
392 list_for_each_entry(dai, &component->dai_list, list) {
393 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
397 if (ret > PAGE_SIZE) {
404 mutex_unlock(&client_mutex);
406 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
413 static const struct file_operations dai_list_fops = {
414 .read = dai_list_read_file,
415 .llseek = default_llseek,/* read accesses f_pos */
418 static ssize_t platform_list_read_file(struct file *file,
419 char __user *user_buf,
420 size_t count, loff_t *ppos)
422 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
423 ssize_t len, ret = 0;
424 struct snd_soc_platform *platform;
429 mutex_lock(&client_mutex);
431 list_for_each_entry(platform, &platform_list, list) {
432 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
433 platform->component.name);
436 if (ret > PAGE_SIZE) {
442 mutex_unlock(&client_mutex);
444 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
451 static const struct file_operations platform_list_fops = {
452 .read = platform_list_read_file,
453 .llseek = default_llseek,/* read accesses f_pos */
456 static void soc_init_card_debugfs(struct snd_soc_card *card)
458 card->debugfs_card_root = debugfs_create_dir(card->name,
459 snd_soc_debugfs_root);
460 if (!card->debugfs_card_root) {
462 "ASoC: Failed to create card debugfs directory\n");
466 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
467 card->debugfs_card_root,
469 if (!card->debugfs_pop_time)
471 "ASoC: Failed to create pop time debugfs file\n");
474 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
476 debugfs_remove_recursive(card->debugfs_card_root);
481 #define soc_init_codec_debugfs NULL
483 static inline void soc_init_component_debugfs(
484 struct snd_soc_component *component)
488 static inline void soc_cleanup_component_debugfs(
489 struct snd_soc_component *component)
493 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
497 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
502 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
503 const char *dai_link, int stream)
507 for (i = 0; i < card->num_links; i++) {
508 if (card->rtd[i].dai_link->no_pcm &&
509 !strcmp(card->rtd[i].dai_link->name, dai_link))
510 return card->rtd[i].pcm->streams[stream].substream;
512 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
515 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
517 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
518 const char *dai_link)
522 for (i = 0; i < card->num_links; i++) {
523 if (!strcmp(card->rtd[i].dai_link->name, dai_link))
524 return &card->rtd[i];
526 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
529 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
531 static void codec2codec_close_delayed_work(struct work_struct *work)
533 /* Currently nothing to do for c2c links
534 * Since c2c links are internal nodes in the DAPM graph and
535 * don't interface with the outside world or application layer
536 * we don't have to do any special handling on close.
540 #ifdef CONFIG_PM_SLEEP
541 /* powers down audio subsystem for suspend */
542 int snd_soc_suspend(struct device *dev)
544 struct snd_soc_card *card = dev_get_drvdata(dev);
545 struct snd_soc_codec *codec;
548 /* If the card is not initialized yet there is nothing to do */
549 if (!card->instantiated)
552 /* Due to the resume being scheduled into a workqueue we could
553 * suspend before that's finished - wait for it to complete.
555 snd_power_lock(card->snd_card);
556 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
557 snd_power_unlock(card->snd_card);
559 /* we're going to block userspace touching us until resume completes */
560 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
562 /* mute any active DACs */
563 for (i = 0; i < card->num_rtd; i++) {
565 if (card->rtd[i].dai_link->ignore_suspend)
568 for (j = 0; j < card->rtd[i].num_codecs; j++) {
569 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
570 struct snd_soc_dai_driver *drv = dai->driver;
572 if (drv->ops->digital_mute && dai->playback_active)
573 drv->ops->digital_mute(dai, 1);
577 /* suspend all pcms */
578 for (i = 0; i < card->num_rtd; i++) {
579 if (card->rtd[i].dai_link->ignore_suspend)
582 snd_pcm_suspend_all(card->rtd[i].pcm);
585 if (card->suspend_pre)
586 card->suspend_pre(card);
588 for (i = 0; i < card->num_rtd; i++) {
589 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
591 if (card->rtd[i].dai_link->ignore_suspend)
594 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
595 cpu_dai->driver->suspend(cpu_dai);
598 /* close any waiting streams and save state */
599 for (i = 0; i < card->num_rtd; i++) {
600 struct snd_soc_dai **codec_dais = card->rtd[i].codec_dais;
601 flush_delayed_work(&card->rtd[i].delayed_work);
602 for (j = 0; j < card->rtd[i].num_codecs; j++) {
603 codec_dais[j]->codec->dapm.suspend_bias_level =
604 codec_dais[j]->codec->dapm.bias_level;
608 for (i = 0; i < card->num_rtd; i++) {
610 if (card->rtd[i].dai_link->ignore_suspend)
613 snd_soc_dapm_stream_event(&card->rtd[i],
614 SNDRV_PCM_STREAM_PLAYBACK,
615 SND_SOC_DAPM_STREAM_SUSPEND);
617 snd_soc_dapm_stream_event(&card->rtd[i],
618 SNDRV_PCM_STREAM_CAPTURE,
619 SND_SOC_DAPM_STREAM_SUSPEND);
622 /* Recheck all endpoints too, their state is affected by suspend */
623 dapm_mark_endpoints_dirty(card);
624 snd_soc_dapm_sync(&card->dapm);
626 /* suspend all CODECs */
627 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
628 /* If there are paths active then the CODEC will be held with
629 * bias _ON and should not be suspended. */
630 if (!codec->suspended) {
631 switch (codec->dapm.bias_level) {
632 case SND_SOC_BIAS_STANDBY:
634 * If the CODEC is capable of idle
635 * bias off then being in STANDBY
636 * means it's doing something,
637 * otherwise fall through.
639 if (codec->dapm.idle_bias_off) {
641 "ASoC: idle_bias_off CODEC on over suspend\n");
645 case SND_SOC_BIAS_OFF:
646 if (codec->driver->suspend)
647 codec->driver->suspend(codec);
648 codec->suspended = 1;
649 if (codec->component.regmap)
650 regcache_mark_dirty(codec->component.regmap);
651 /* deactivate pins to sleep state */
652 pinctrl_pm_select_sleep_state(codec->dev);
656 "ASoC: CODEC is on over suspend\n");
662 for (i = 0; i < card->num_rtd; i++) {
663 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
665 if (card->rtd[i].dai_link->ignore_suspend)
668 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
669 cpu_dai->driver->suspend(cpu_dai);
671 /* deactivate pins to sleep state */
672 pinctrl_pm_select_sleep_state(cpu_dai->dev);
675 if (card->suspend_post)
676 card->suspend_post(card);
680 EXPORT_SYMBOL_GPL(snd_soc_suspend);
682 /* deferred resume work, so resume can complete before we finished
683 * setting our codec back up, which can be very slow on I2C
685 static void soc_resume_deferred(struct work_struct *work)
687 struct snd_soc_card *card =
688 container_of(work, struct snd_soc_card, deferred_resume_work);
689 struct snd_soc_codec *codec;
692 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
693 * so userspace apps are blocked from touching us
696 dev_dbg(card->dev, "ASoC: starting resume work\n");
698 /* Bring us up into D2 so that DAPM starts enabling things */
699 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
701 if (card->resume_pre)
702 card->resume_pre(card);
704 /* resume control bus DAIs */
705 for (i = 0; i < card->num_rtd; i++) {
706 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
708 if (card->rtd[i].dai_link->ignore_suspend)
711 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
712 cpu_dai->driver->resume(cpu_dai);
715 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
716 /* If the CODEC was idle over suspend then it will have been
717 * left with bias OFF or STANDBY and suspended so we must now
718 * resume. Otherwise the suspend was suppressed.
720 if (codec->suspended) {
721 switch (codec->dapm.bias_level) {
722 case SND_SOC_BIAS_STANDBY:
723 case SND_SOC_BIAS_OFF:
724 if (codec->driver->resume)
725 codec->driver->resume(codec);
726 codec->suspended = 0;
730 "ASoC: CODEC was on over suspend\n");
736 for (i = 0; i < card->num_rtd; i++) {
738 if (card->rtd[i].dai_link->ignore_suspend)
741 snd_soc_dapm_stream_event(&card->rtd[i],
742 SNDRV_PCM_STREAM_PLAYBACK,
743 SND_SOC_DAPM_STREAM_RESUME);
745 snd_soc_dapm_stream_event(&card->rtd[i],
746 SNDRV_PCM_STREAM_CAPTURE,
747 SND_SOC_DAPM_STREAM_RESUME);
750 /* unmute any active DACs */
751 for (i = 0; i < card->num_rtd; i++) {
753 if (card->rtd[i].dai_link->ignore_suspend)
756 for (j = 0; j < card->rtd[i].num_codecs; j++) {
757 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
758 struct snd_soc_dai_driver *drv = dai->driver;
760 if (drv->ops->digital_mute && dai->playback_active)
761 drv->ops->digital_mute(dai, 0);
765 for (i = 0; i < card->num_rtd; i++) {
766 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
768 if (card->rtd[i].dai_link->ignore_suspend)
771 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
772 cpu_dai->driver->resume(cpu_dai);
775 if (card->resume_post)
776 card->resume_post(card);
778 dev_dbg(card->dev, "ASoC: resume work completed\n");
780 /* userspace can access us now we are back as we were before */
781 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
783 /* Recheck all endpoints too, their state is affected by suspend */
784 dapm_mark_endpoints_dirty(card);
785 snd_soc_dapm_sync(&card->dapm);
788 /* powers up audio subsystem after a suspend */
789 int snd_soc_resume(struct device *dev)
791 struct snd_soc_card *card = dev_get_drvdata(dev);
792 bool bus_control = false;
795 /* If the card is not initialized yet there is nothing to do */
796 if (!card->instantiated)
799 /* activate pins from sleep state */
800 for (i = 0; i < card->num_rtd; i++) {
801 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
802 struct snd_soc_dai **codec_dais = rtd->codec_dais;
803 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
807 pinctrl_pm_select_default_state(cpu_dai->dev);
809 for (j = 0; j < rtd->num_codecs; j++) {
810 struct snd_soc_dai *codec_dai = codec_dais[j];
811 if (codec_dai->active)
812 pinctrl_pm_select_default_state(codec_dai->dev);
817 * DAIs that also act as the control bus master might have other drivers
818 * hanging off them so need to resume immediately. Other drivers don't
819 * have that problem and may take a substantial amount of time to resume
820 * due to I/O costs and anti-pop so handle them out of line.
822 for (i = 0; i < card->num_rtd; i++) {
823 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
824 bus_control |= cpu_dai->driver->bus_control;
827 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
828 soc_resume_deferred(&card->deferred_resume_work);
830 dev_dbg(dev, "ASoC: Scheduling resume work\n");
831 if (!schedule_work(&card->deferred_resume_work))
832 dev_err(dev, "ASoC: resume work item may be lost\n");
837 EXPORT_SYMBOL_GPL(snd_soc_resume);
839 #define snd_soc_suspend NULL
840 #define snd_soc_resume NULL
843 static const struct snd_soc_dai_ops null_dai_ops = {
846 static struct snd_soc_component *soc_find_component(
847 const struct device_node *of_node, const char *name)
849 struct snd_soc_component *component;
851 lockdep_assert_held(&client_mutex);
853 list_for_each_entry(component, &component_list, list) {
855 if (component->dev->of_node == of_node)
857 } else if (strcmp(component->name, name) == 0) {
865 static struct snd_soc_dai *snd_soc_find_dai(
866 const struct snd_soc_dai_link_component *dlc)
868 struct snd_soc_component *component;
869 struct snd_soc_dai *dai;
871 lockdep_assert_held(&client_mutex);
873 /* Find CPU DAI from registered DAIs*/
874 list_for_each_entry(component, &component_list, list) {
875 if (dlc->of_node && component->dev->of_node != dlc->of_node)
877 if (dlc->name && strcmp(component->name, dlc->name))
879 list_for_each_entry(dai, &component->dai_list, list) {
880 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
890 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
892 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
893 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
894 struct snd_soc_dai_link_component *codecs = dai_link->codecs;
895 struct snd_soc_dai_link_component cpu_dai_component;
896 struct snd_soc_dai **codec_dais = rtd->codec_dais;
897 struct snd_soc_platform *platform;
898 const char *platform_name;
901 dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
903 cpu_dai_component.name = dai_link->cpu_name;
904 cpu_dai_component.of_node = dai_link->cpu_of_node;
905 cpu_dai_component.dai_name = dai_link->cpu_dai_name;
906 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
908 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
909 dai_link->cpu_dai_name);
910 return -EPROBE_DEFER;
913 rtd->num_codecs = dai_link->num_codecs;
915 /* Find CODEC from registered CODECs */
916 for (i = 0; i < rtd->num_codecs; i++) {
917 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
918 if (!codec_dais[i]) {
919 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
921 return -EPROBE_DEFER;
925 /* Single codec links expect codec and codec_dai in runtime data */
926 rtd->codec_dai = codec_dais[0];
927 rtd->codec = rtd->codec_dai->codec;
929 /* if there's no platform we match on the empty platform */
930 platform_name = dai_link->platform_name;
931 if (!platform_name && !dai_link->platform_of_node)
932 platform_name = "snd-soc-dummy";
934 /* find one from the set of registered platforms */
935 list_for_each_entry(platform, &platform_list, list) {
936 if (dai_link->platform_of_node) {
937 if (platform->dev->of_node !=
938 dai_link->platform_of_node)
941 if (strcmp(platform->component.name, platform_name))
945 rtd->platform = platform;
947 if (!rtd->platform) {
948 dev_err(card->dev, "ASoC: platform %s not registered\n",
949 dai_link->platform_name);
950 return -EPROBE_DEFER;
958 static void soc_remove_component(struct snd_soc_component *component)
960 if (!component->probed)
963 /* This is a HACK and will be removed soon */
964 if (component->codec)
965 list_del(&component->codec->card_list);
967 if (component->remove)
968 component->remove(component);
970 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
972 soc_cleanup_component_debugfs(component);
973 component->probed = 0;
974 module_put(component->dev->driver->owner);
977 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
981 if (dai && dai->probed &&
982 dai->driver->remove_order == order) {
983 if (dai->driver->remove) {
984 err = dai->driver->remove(dai);
987 "ASoC: failed to remove %s: %d\n",
994 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
996 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
999 /* unregister the rtd device */
1000 if (rtd->dev_registered) {
1001 device_unregister(rtd->dev);
1002 rtd->dev_registered = 0;
1005 /* remove the CODEC DAI */
1006 for (i = 0; i < rtd->num_codecs; i++)
1007 soc_remove_dai(rtd->codec_dais[i], order);
1009 soc_remove_dai(rtd->cpu_dai, order);
1012 static void soc_remove_link_components(struct snd_soc_card *card, int num,
1015 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1016 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1017 struct snd_soc_platform *platform = rtd->platform;
1018 struct snd_soc_component *component;
1021 /* remove the platform */
1022 if (platform && platform->component.driver->remove_order == order)
1023 soc_remove_component(&platform->component);
1025 /* remove the CODEC-side CODEC */
1026 for (i = 0; i < rtd->num_codecs; i++) {
1027 component = rtd->codec_dais[i]->component;
1028 if (component->driver->remove_order == order)
1029 soc_remove_component(component);
1032 /* remove any CPU-side CODEC */
1034 if (cpu_dai->component->driver->remove_order == order)
1035 soc_remove_component(cpu_dai->component);
1039 static void soc_remove_dai_links(struct snd_soc_card *card)
1043 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1045 for (dai = 0; dai < card->num_rtd; dai++)
1046 soc_remove_link_dais(card, dai, order);
1049 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1051 for (dai = 0; dai < card->num_rtd; dai++)
1052 soc_remove_link_components(card, dai, order);
1058 static void soc_set_name_prefix(struct snd_soc_card *card,
1059 struct snd_soc_component *component)
1063 if (card->codec_conf == NULL)
1066 for (i = 0; i < card->num_configs; i++) {
1067 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1068 if (map->of_node && component->dev->of_node != map->of_node)
1070 if (map->dev_name && strcmp(component->name, map->dev_name))
1072 component->name_prefix = map->name_prefix;
1077 static int soc_probe_component(struct snd_soc_card *card,
1078 struct snd_soc_component *component)
1080 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1081 struct snd_soc_dai *dai;
1084 if (component->probed)
1087 component->card = card;
1089 soc_set_name_prefix(card, component);
1091 if (!try_module_get(component->dev->driver->owner))
1094 soc_init_component_debugfs(component);
1096 if (component->dapm_widgets) {
1097 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
1098 component->num_dapm_widgets);
1101 dev_err(component->dev,
1102 "Failed to create new controls %d\n", ret);
1107 list_for_each_entry(dai, &component->dai_list, list) {
1108 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1110 dev_err(component->dev,
1111 "Failed to create DAI widgets %d\n", ret);
1116 if (component->probe) {
1117 ret = component->probe(component);
1119 dev_err(component->dev,
1120 "ASoC: failed to probe component %d\n", ret);
1124 WARN(dapm->idle_bias_off &&
1125 dapm->bias_level != SND_SOC_BIAS_OFF,
1126 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1130 if (component->controls)
1131 snd_soc_add_component_controls(component, component->controls,
1132 component->num_controls);
1133 if (component->dapm_routes)
1134 snd_soc_dapm_add_routes(dapm, component->dapm_routes,
1135 component->num_dapm_routes);
1137 component->probed = 1;
1138 list_add(&dapm->list, &card->dapm_list);
1140 /* This is a HACK and will be removed soon */
1141 if (component->codec)
1142 list_add(&component->codec->card_list, &card->codec_dev_list);
1147 soc_cleanup_component_debugfs(component);
1148 module_put(component->dev->driver->owner);
1153 static void rtd_release(struct device *dev)
1158 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1163 /* register the rtd device */
1164 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1167 device_initialize(rtd->dev);
1168 rtd->dev->parent = rtd->card->dev;
1169 rtd->dev->release = rtd_release;
1170 rtd->dev->groups = soc_dev_attr_groups;
1171 dev_set_name(rtd->dev, "%s", name);
1172 dev_set_drvdata(rtd->dev, rtd);
1173 mutex_init(&rtd->pcm_mutex);
1174 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1175 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1176 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1177 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1178 ret = device_add(rtd->dev);
1180 /* calling put_device() here to free the rtd->dev */
1181 put_device(rtd->dev);
1182 dev_err(rtd->card->dev,
1183 "ASoC: failed to register runtime device: %d\n", ret);
1186 rtd->dev_registered = 1;
1190 static int soc_probe_link_components(struct snd_soc_card *card, int num,
1193 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1194 struct snd_soc_platform *platform = rtd->platform;
1195 struct snd_soc_component *component;
1198 /* probe the CPU-side component, if it is a CODEC */
1199 component = rtd->cpu_dai->component;
1200 if (component->driver->probe_order == order) {
1201 ret = soc_probe_component(card, component);
1206 /* probe the CODEC-side components */
1207 for (i = 0; i < rtd->num_codecs; i++) {
1208 component = rtd->codec_dais[i]->component;
1209 if (component->driver->probe_order == order) {
1210 ret = soc_probe_component(card, component);
1216 /* probe the platform */
1217 if (platform->component.driver->probe_order == order) {
1218 ret = soc_probe_component(card, &platform->component);
1226 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1230 if (!dai->probed && dai->driver->probe_order == order) {
1231 if (dai->driver->probe) {
1232 ret = dai->driver->probe(dai);
1235 "ASoC: failed to probe DAI %s: %d\n",
1247 static int soc_link_dai_widgets(struct snd_soc_card *card,
1248 struct snd_soc_dai_link *dai_link,
1249 struct snd_soc_pcm_runtime *rtd)
1251 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1252 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1253 struct snd_soc_dapm_widget *play_w, *capture_w;
1256 if (rtd->num_codecs > 1)
1257 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1259 /* link the DAI widgets */
1260 play_w = codec_dai->playback_widget;
1261 capture_w = cpu_dai->capture_widget;
1262 if (play_w && capture_w) {
1263 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1266 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1267 play_w->name, capture_w->name, ret);
1272 play_w = cpu_dai->playback_widget;
1273 capture_w = codec_dai->capture_widget;
1274 if (play_w && capture_w) {
1275 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1278 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1279 play_w->name, capture_w->name, ret);
1287 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1289 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1290 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1291 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1294 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1295 card->name, num, order);
1297 /* set default power off timeout */
1298 rtd->pmdown_time = pmdown_time;
1300 ret = soc_probe_dai(cpu_dai, order);
1304 /* probe the CODEC DAI */
1305 for (i = 0; i < rtd->num_codecs; i++) {
1306 ret = soc_probe_dai(rtd->codec_dais[i], order);
1311 /* complete DAI probe during last probe */
1312 if (order != SND_SOC_COMP_ORDER_LAST)
1315 /* do machine specific initialization */
1316 if (dai_link->init) {
1317 ret = dai_link->init(rtd);
1319 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1320 dai_link->name, ret);
1325 ret = soc_post_component_init(rtd, dai_link->name);
1329 #ifdef CONFIG_DEBUG_FS
1330 /* add DPCM sysfs entries */
1331 if (dai_link->dynamic) {
1332 ret = soc_dpcm_debugfs_add(rtd);
1335 "ASoC: failed to add dpcm sysfs entries: %d\n",
1342 if (cpu_dai->driver->compress_dai) {
1343 /*create compress_device"*/
1344 ret = soc_new_compress(rtd, num);
1346 dev_err(card->dev, "ASoC: can't create compress %s\n",
1347 dai_link->stream_name);
1352 if (!dai_link->params) {
1353 /* create the pcm */
1354 ret = soc_new_pcm(rtd, num);
1356 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1357 dai_link->stream_name, ret);
1361 INIT_DELAYED_WORK(&rtd->delayed_work,
1362 codec2codec_close_delayed_work);
1364 /* link the DAI widgets */
1365 ret = soc_link_dai_widgets(card, dai_link, rtd);
1374 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1376 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1377 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1378 const char *name = aux_dev->codec_name;
1380 rtd->component = soc_find_component(aux_dev->codec_of_node, name);
1381 if (!rtd->component) {
1382 if (aux_dev->codec_of_node)
1383 name = of_node_full_name(aux_dev->codec_of_node);
1385 dev_err(card->dev, "ASoC: %s not registered\n", name);
1386 return -EPROBE_DEFER;
1390 * Some places still reference rtd->codec, so we have to keep that
1391 * initialized if the component is a CODEC. Once all those references
1392 * have been removed, this code can be removed as well.
1394 rtd->codec = rtd->component->codec;
1399 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1401 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1402 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1405 ret = soc_probe_component(card, rtd->component);
1409 /* do machine specific initialization */
1410 if (aux_dev->init) {
1411 ret = aux_dev->init(rtd->component);
1413 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1414 aux_dev->name, ret);
1419 return soc_post_component_init(rtd, aux_dev->name);
1422 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1424 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1425 struct snd_soc_component *component = rtd->component;
1427 /* unregister the rtd device */
1428 if (rtd->dev_registered) {
1429 device_remove_file(rtd->dev, &dev_attr_codec_reg);
1430 device_unregister(rtd->dev);
1431 rtd->dev_registered = 0;
1434 if (component && component->probed)
1435 soc_remove_component(component);
1438 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1442 if (codec->cache_init)
1445 ret = snd_soc_cache_init(codec);
1448 "ASoC: Failed to set cache compression type: %d\n",
1452 codec->cache_init = 1;
1457 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1458 * @rtd: The runtime for which the DAI link format should be changed
1459 * @dai_fmt: The new DAI link format
1461 * This function updates the DAI link format for all DAIs connected to the DAI
1462 * link for the specified runtime.
1464 * Note: For setups with a static format set the dai_fmt field in the
1465 * corresponding snd_dai_link struct instead of using this function.
1467 * Returns 0 on success, otherwise a negative error code.
1469 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1470 unsigned int dai_fmt)
1472 struct snd_soc_dai **codec_dais = rtd->codec_dais;
1473 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1477 for (i = 0; i < rtd->num_codecs; i++) {
1478 struct snd_soc_dai *codec_dai = codec_dais[i];
1480 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1481 if (ret != 0 && ret != -ENOTSUPP) {
1482 dev_warn(codec_dai->dev,
1483 "ASoC: Failed to set DAI format: %d\n", ret);
1488 /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1489 if (cpu_dai->codec) {
1490 unsigned int inv_dai_fmt;
1492 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1493 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1494 case SND_SOC_DAIFMT_CBM_CFM:
1495 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1497 case SND_SOC_DAIFMT_CBM_CFS:
1498 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1500 case SND_SOC_DAIFMT_CBS_CFM:
1501 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1503 case SND_SOC_DAIFMT_CBS_CFS:
1504 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1508 dai_fmt = inv_dai_fmt;
1511 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1512 if (ret != 0 && ret != -ENOTSUPP) {
1513 dev_warn(cpu_dai->dev,
1514 "ASoC: Failed to set DAI format: %d\n", ret);
1520 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1522 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1524 struct snd_soc_codec *codec;
1527 mutex_lock(&client_mutex);
1528 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1531 for (i = 0; i < card->num_links; i++) {
1532 ret = soc_bind_dai_link(card, i);
1537 /* bind aux_devs too */
1538 for (i = 0; i < card->num_aux_devs; i++) {
1539 ret = soc_bind_aux_dev(card, i);
1544 /* initialize the register cache for each available codec */
1545 list_for_each_entry(codec, &codec_list, list) {
1546 if (codec->cache_init)
1548 ret = snd_soc_init_codec_cache(codec);
1553 /* card bind complete so register a sound card */
1554 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1555 card->owner, 0, &card->snd_card);
1558 "ASoC: can't create sound card for card %s: %d\n",
1563 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1564 card->dapm.dev = card->dev;
1565 card->dapm.card = card;
1566 list_add(&card->dapm.list, &card->dapm_list);
1568 #ifdef CONFIG_DEBUG_FS
1569 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1572 #ifdef CONFIG_PM_SLEEP
1573 /* deferred resume work */
1574 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1577 if (card->dapm_widgets)
1578 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1579 card->num_dapm_widgets);
1581 if (card->of_dapm_widgets)
1582 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
1583 card->num_of_dapm_widgets);
1585 /* initialise the sound card only once */
1587 ret = card->probe(card);
1589 goto card_probe_error;
1592 /* probe all components used by DAI links on this card */
1593 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1595 for (i = 0; i < card->num_links; i++) {
1596 ret = soc_probe_link_components(card, i, order);
1599 "ASoC: failed to instantiate card %d\n",
1606 /* probe all DAI links on this card */
1607 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1609 for (i = 0; i < card->num_links; i++) {
1610 ret = soc_probe_link_dais(card, i, order);
1613 "ASoC: failed to instantiate card %d\n",
1620 for (i = 0; i < card->num_aux_devs; i++) {
1621 ret = soc_probe_aux_dev(card, i);
1624 "ASoC: failed to add auxiliary devices %d\n",
1626 goto probe_aux_dev_err;
1630 snd_soc_dapm_link_dai_widgets(card);
1631 snd_soc_dapm_connect_dai_link_widgets(card);
1634 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1636 if (card->dapm_routes)
1637 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1638 card->num_dapm_routes);
1640 if (card->of_dapm_routes)
1641 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
1642 card->num_of_dapm_routes);
1644 for (i = 0; i < card->num_links; i++) {
1645 if (card->dai_link[i].dai_fmt)
1646 snd_soc_runtime_set_dai_fmt(&card->rtd[i],
1647 card->dai_link[i].dai_fmt);
1650 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1652 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1653 "%s", card->long_name ? card->long_name : card->name);
1654 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1655 "%s", card->driver_name ? card->driver_name : card->name);
1656 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1657 switch (card->snd_card->driver[i]) {
1663 if (!isalnum(card->snd_card->driver[i]))
1664 card->snd_card->driver[i] = '_';
1669 if (card->late_probe) {
1670 ret = card->late_probe(card);
1672 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1674 goto probe_aux_dev_err;
1678 snd_soc_dapm_new_widgets(card);
1680 ret = snd_card_register(card->snd_card);
1682 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1684 goto probe_aux_dev_err;
1687 card->instantiated = 1;
1688 snd_soc_dapm_sync(&card->dapm);
1689 mutex_unlock(&card->mutex);
1690 mutex_unlock(&client_mutex);
1695 for (i = 0; i < card->num_aux_devs; i++)
1696 soc_remove_aux_dev(card, i);
1699 soc_remove_dai_links(card);
1705 snd_card_free(card->snd_card);
1708 mutex_unlock(&card->mutex);
1709 mutex_unlock(&client_mutex);
1714 /* probes a new socdev */
1715 static int soc_probe(struct platform_device *pdev)
1717 struct snd_soc_card *card = platform_get_drvdata(pdev);
1720 * no card, so machine driver should be registering card
1721 * we should not be here in that case so ret error
1726 dev_warn(&pdev->dev,
1727 "ASoC: machine %s should use snd_soc_register_card()\n",
1730 /* Bodge while we unpick instantiation */
1731 card->dev = &pdev->dev;
1733 return snd_soc_register_card(card);
1736 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1740 /* make sure any delayed work runs */
1741 for (i = 0; i < card->num_rtd; i++) {
1742 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1743 flush_delayed_work(&rtd->delayed_work);
1746 /* remove auxiliary devices */
1747 for (i = 0; i < card->num_aux_devs; i++)
1748 soc_remove_aux_dev(card, i);
1750 /* remove and free each DAI */
1751 soc_remove_dai_links(card);
1753 soc_cleanup_card_debugfs(card);
1755 /* remove the card */
1759 snd_soc_dapm_free(&card->dapm);
1761 snd_card_free(card->snd_card);
1766 /* removes a socdev */
1767 static int soc_remove(struct platform_device *pdev)
1769 struct snd_soc_card *card = platform_get_drvdata(pdev);
1771 snd_soc_unregister_card(card);
1775 int snd_soc_poweroff(struct device *dev)
1777 struct snd_soc_card *card = dev_get_drvdata(dev);
1780 if (!card->instantiated)
1783 /* Flush out pmdown_time work - we actually do want to run it
1784 * now, we're shutting down so no imminent restart. */
1785 for (i = 0; i < card->num_rtd; i++) {
1786 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1787 flush_delayed_work(&rtd->delayed_work);
1790 snd_soc_dapm_shutdown(card);
1792 /* deactivate pins to sleep state */
1793 for (i = 0; i < card->num_rtd; i++) {
1794 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1795 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1798 pinctrl_pm_select_sleep_state(cpu_dai->dev);
1799 for (j = 0; j < rtd->num_codecs; j++) {
1800 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
1801 pinctrl_pm_select_sleep_state(codec_dai->dev);
1807 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1809 const struct dev_pm_ops snd_soc_pm_ops = {
1810 .suspend = snd_soc_suspend,
1811 .resume = snd_soc_resume,
1812 .freeze = snd_soc_suspend,
1813 .thaw = snd_soc_resume,
1814 .poweroff = snd_soc_poweroff,
1815 .restore = snd_soc_resume,
1817 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1819 /* ASoC platform driver */
1820 static struct platform_driver soc_driver = {
1822 .name = "soc-audio",
1823 .pm = &snd_soc_pm_ops,
1826 .remove = soc_remove,
1830 * snd_soc_cnew - create new control
1831 * @_template: control template
1832 * @data: control private data
1833 * @long_name: control long name
1834 * @prefix: control name prefix
1836 * Create a new mixer control from a template control.
1838 * Returns 0 for success, else error.
1840 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1841 void *data, const char *long_name,
1844 struct snd_kcontrol_new template;
1845 struct snd_kcontrol *kcontrol;
1848 memcpy(&template, _template, sizeof(template));
1852 long_name = template.name;
1855 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
1859 template.name = name;
1861 template.name = long_name;
1864 kcontrol = snd_ctl_new1(&template, data);
1870 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1872 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
1873 const struct snd_kcontrol_new *controls, int num_controls,
1874 const char *prefix, void *data)
1878 for (i = 0; i < num_controls; i++) {
1879 const struct snd_kcontrol_new *control = &controls[i];
1880 err = snd_ctl_add(card, snd_soc_cnew(control, data,
1881 control->name, prefix));
1883 dev_err(dev, "ASoC: Failed to add %s: %d\n",
1884 control->name, err);
1892 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
1895 struct snd_card *card = soc_card->snd_card;
1896 struct snd_kcontrol *kctl;
1898 if (unlikely(!name))
1901 list_for_each_entry(kctl, &card->controls, list)
1902 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
1906 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
1909 * snd_soc_add_component_controls - Add an array of controls to a component.
1911 * @component: Component to add controls to
1912 * @controls: Array of controls to add
1913 * @num_controls: Number of elements in the array
1915 * Return: 0 for success, else error.
1917 int snd_soc_add_component_controls(struct snd_soc_component *component,
1918 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1920 struct snd_card *card = component->card->snd_card;
1922 return snd_soc_add_controls(card, component->dev, controls,
1923 num_controls, component->name_prefix, component);
1925 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
1928 * snd_soc_add_codec_controls - add an array of controls to a codec.
1929 * Convenience function to add a list of controls. Many codecs were
1930 * duplicating this code.
1932 * @codec: codec to add controls to
1933 * @controls: array of controls to add
1934 * @num_controls: number of elements in the array
1936 * Return 0 for success, else error.
1938 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
1939 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1941 return snd_soc_add_component_controls(&codec->component, controls,
1944 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
1947 * snd_soc_add_platform_controls - add an array of controls to a platform.
1948 * Convenience function to add a list of controls.
1950 * @platform: platform to add controls to
1951 * @controls: array of controls to add
1952 * @num_controls: number of elements in the array
1954 * Return 0 for success, else error.
1956 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
1957 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1959 return snd_soc_add_component_controls(&platform->component, controls,
1962 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
1965 * snd_soc_add_card_controls - add an array of controls to a SoC card.
1966 * Convenience function to add a list of controls.
1968 * @soc_card: SoC card to add controls to
1969 * @controls: array of controls to add
1970 * @num_controls: number of elements in the array
1972 * Return 0 for success, else error.
1974 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
1975 const struct snd_kcontrol_new *controls, int num_controls)
1977 struct snd_card *card = soc_card->snd_card;
1979 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
1982 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
1985 * snd_soc_add_dai_controls - add an array of controls to a DAI.
1986 * Convienience function to add a list of controls.
1988 * @dai: DAI to add controls to
1989 * @controls: array of controls to add
1990 * @num_controls: number of elements in the array
1992 * Return 0 for success, else error.
1994 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
1995 const struct snd_kcontrol_new *controls, int num_controls)
1997 struct snd_card *card = dai->component->card->snd_card;
1999 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2002 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2005 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2007 * @clk_id: DAI specific clock ID
2008 * @freq: new clock frequency in Hz
2009 * @dir: new clock direction - input/output.
2011 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2013 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2014 unsigned int freq, int dir)
2016 if (dai->driver && dai->driver->ops->set_sysclk)
2017 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2018 else if (dai->codec && dai->codec->driver->set_sysclk)
2019 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
2024 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2027 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2029 * @clk_id: DAI specific clock ID
2030 * @source: Source for the clock
2031 * @freq: new clock frequency in Hz
2032 * @dir: new clock direction - input/output.
2034 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2036 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2037 int source, unsigned int freq, int dir)
2039 if (codec->driver->set_sysclk)
2040 return codec->driver->set_sysclk(codec, clk_id, source,
2045 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2048 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2050 * @div_id: DAI specific clock divider ID
2051 * @div: new clock divisor.
2053 * Configures the clock dividers. This is used to derive the best DAI bit and
2054 * frame clocks from the system or master clock. It's best to set the DAI bit
2055 * and frame clocks as low as possible to save system power.
2057 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2058 int div_id, int div)
2060 if (dai->driver && dai->driver->ops->set_clkdiv)
2061 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2065 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2068 * snd_soc_dai_set_pll - configure DAI PLL.
2070 * @pll_id: DAI specific PLL ID
2071 * @source: DAI specific source for the PLL
2072 * @freq_in: PLL input clock frequency in Hz
2073 * @freq_out: requested PLL output clock frequency in Hz
2075 * Configures and enables PLL to generate output clock based on input clock.
2077 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2078 unsigned int freq_in, unsigned int freq_out)
2080 if (dai->driver && dai->driver->ops->set_pll)
2081 return dai->driver->ops->set_pll(dai, pll_id, source,
2083 else if (dai->codec && dai->codec->driver->set_pll)
2084 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2089 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2092 * snd_soc_codec_set_pll - configure codec PLL.
2094 * @pll_id: DAI specific PLL ID
2095 * @source: DAI specific source for the PLL
2096 * @freq_in: PLL input clock frequency in Hz
2097 * @freq_out: requested PLL output clock frequency in Hz
2099 * Configures and enables PLL to generate output clock based on input clock.
2101 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2102 unsigned int freq_in, unsigned int freq_out)
2104 if (codec->driver->set_pll)
2105 return codec->driver->set_pll(codec, pll_id, source,
2110 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2113 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2115 * @ratio Ratio of BCLK to Sample rate.
2117 * Configures the DAI for a preset BCLK to sample rate ratio.
2119 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2121 if (dai->driver && dai->driver->ops->set_bclk_ratio)
2122 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2126 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2129 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2131 * @fmt: SND_SOC_DAIFMT_ format value.
2133 * Configures the DAI hardware format and clocking.
2135 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2137 if (dai->driver == NULL)
2139 if (dai->driver->ops->set_fmt == NULL)
2141 return dai->driver->ops->set_fmt(dai, fmt);
2143 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2146 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2147 * @slots: Number of slots in use.
2148 * @tx_mask: bitmask representing active TX slots.
2149 * @rx_mask: bitmask representing active RX slots.
2151 * Generates the TDM tx and rx slot default masks for DAI.
2153 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2154 unsigned int *tx_mask,
2155 unsigned int *rx_mask)
2157 if (*tx_mask || *rx_mask)
2163 *tx_mask = (1 << slots) - 1;
2164 *rx_mask = (1 << slots) - 1;
2170 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2171 * @dai: The DAI to configure
2172 * @tx_mask: bitmask representing active TX slots.
2173 * @rx_mask: bitmask representing active RX slots.
2174 * @slots: Number of slots in use.
2175 * @slot_width: Width in bits for each slot.
2177 * This function configures the specified DAI for TDM operation. @slot contains
2178 * the total number of slots of the TDM stream and @slot_with the width of each
2179 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2180 * active slots of the TDM stream for the specified DAI, i.e. which slots the
2181 * DAI should write to or read from. If a bit is set the corresponding slot is
2182 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2183 * the first slot, bit 1 to the second slot and so on. The first active slot
2184 * maps to the first channel of the DAI, the second active slot to the second
2185 * channel and so on.
2187 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2188 * @rx_mask and @slot_width will be ignored.
2190 * Returns 0 on success, a negative error code otherwise.
2192 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2193 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2195 if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2196 dai->driver->ops->xlate_tdm_slot_mask(slots,
2197 &tx_mask, &rx_mask);
2199 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2201 dai->tx_mask = tx_mask;
2202 dai->rx_mask = rx_mask;
2204 if (dai->driver && dai->driver->ops->set_tdm_slot)
2205 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2210 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2213 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2215 * @tx_num: how many TX channels
2216 * @tx_slot: pointer to an array which imply the TX slot number channel
2218 * @rx_num: how many RX channels
2219 * @rx_slot: pointer to an array which imply the RX slot number channel
2222 * configure the relationship between channel number and TDM slot number.
2224 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2225 unsigned int tx_num, unsigned int *tx_slot,
2226 unsigned int rx_num, unsigned int *rx_slot)
2228 if (dai->driver && dai->driver->ops->set_channel_map)
2229 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2234 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2237 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2239 * @tristate: tristate enable
2241 * Tristates the DAI so that others can use it.
2243 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2245 if (dai->driver && dai->driver->ops->set_tristate)
2246 return dai->driver->ops->set_tristate(dai, tristate);
2250 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2253 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2255 * @mute: mute enable
2256 * @direction: stream to mute
2258 * Mutes the DAI DAC.
2260 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2266 if (dai->driver->ops->mute_stream)
2267 return dai->driver->ops->mute_stream(dai, mute, direction);
2268 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2269 dai->driver->ops->digital_mute)
2270 return dai->driver->ops->digital_mute(dai, mute);
2274 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2276 static int snd_soc_init_multicodec(struct snd_soc_card *card,
2277 struct snd_soc_dai_link *dai_link)
2279 /* Legacy codec/codec_dai link is a single entry in multicodec */
2280 if (dai_link->codec_name || dai_link->codec_of_node ||
2281 dai_link->codec_dai_name) {
2282 dai_link->num_codecs = 1;
2284 dai_link->codecs = devm_kzalloc(card->dev,
2285 sizeof(struct snd_soc_dai_link_component),
2287 if (!dai_link->codecs)
2290 dai_link->codecs[0].name = dai_link->codec_name;
2291 dai_link->codecs[0].of_node = dai_link->codec_of_node;
2292 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
2295 if (!dai_link->codecs) {
2296 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
2304 * snd_soc_register_card - Register a card with the ASoC core
2306 * @card: Card to register
2309 int snd_soc_register_card(struct snd_soc_card *card)
2313 if (!card->name || !card->dev)
2316 for (i = 0; i < card->num_links; i++) {
2317 struct snd_soc_dai_link *link = &card->dai_link[i];
2319 ret = snd_soc_init_multicodec(card, link);
2321 dev_err(card->dev, "ASoC: failed to init multicodec\n");
2325 for (j = 0; j < link->num_codecs; j++) {
2327 * Codec must be specified by 1 of name or OF node,
2328 * not both or neither.
2330 if (!!link->codecs[j].name ==
2331 !!link->codecs[j].of_node) {
2332 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
2336 /* Codec DAI name must be specified */
2337 if (!link->codecs[j].dai_name) {
2338 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
2345 * Platform may be specified by either name or OF node, but
2346 * can be left unspecified, and a dummy platform will be used.
2348 if (link->platform_name && link->platform_of_node) {
2350 "ASoC: Both platform name/of_node are set for %s\n",
2356 * CPU device may be specified by either name or OF node, but
2357 * can be left unspecified, and will be matched based on DAI
2360 if (link->cpu_name && link->cpu_of_node) {
2362 "ASoC: Neither/both cpu name/of_node are set for %s\n",
2367 * At least one of CPU DAI name or CPU device name/node must be
2370 if (!link->cpu_dai_name &&
2371 !(link->cpu_name || link->cpu_of_node)) {
2373 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
2379 dev_set_drvdata(card->dev, card);
2381 snd_soc_initialize_card_lists(card);
2383 soc_init_card_debugfs(card);
2385 card->rtd = devm_kzalloc(card->dev,
2386 sizeof(struct snd_soc_pcm_runtime) *
2387 (card->num_links + card->num_aux_devs),
2389 if (card->rtd == NULL)
2392 card->rtd_aux = &card->rtd[card->num_links];
2394 for (i = 0; i < card->num_links; i++) {
2395 card->rtd[i].card = card;
2396 card->rtd[i].dai_link = &card->dai_link[i];
2397 card->rtd[i].codec_dais = devm_kzalloc(card->dev,
2398 sizeof(struct snd_soc_dai *) *
2399 (card->rtd[i].dai_link->num_codecs),
2401 if (card->rtd[i].codec_dais == NULL)
2405 for (i = 0; i < card->num_aux_devs; i++)
2406 card->rtd_aux[i].card = card;
2408 INIT_LIST_HEAD(&card->dapm_dirty);
2409 card->instantiated = 0;
2410 mutex_init(&card->mutex);
2411 mutex_init(&card->dapm_mutex);
2413 ret = snd_soc_instantiate_card(card);
2415 soc_cleanup_card_debugfs(card);
2417 /* deactivate pins to sleep state */
2418 for (i = 0; i < card->num_rtd; i++) {
2419 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2420 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2423 for (j = 0; j < rtd->num_codecs; j++) {
2424 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2425 if (!codec_dai->active)
2426 pinctrl_pm_select_sleep_state(codec_dai->dev);
2429 if (!cpu_dai->active)
2430 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2435 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2438 * snd_soc_unregister_card - Unregister a card with the ASoC core
2440 * @card: Card to unregister
2443 int snd_soc_unregister_card(struct snd_soc_card *card)
2445 if (card->instantiated) {
2446 card->instantiated = false;
2447 snd_soc_dapm_shutdown(card);
2448 soc_cleanup_card_resources(card);
2449 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2454 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2457 * Simplify DAI link configuration by removing ".-1" from device names
2458 * and sanitizing names.
2460 static char *fmt_single_name(struct device *dev, int *id)
2462 char *found, name[NAME_SIZE];
2465 if (dev_name(dev) == NULL)
2468 strlcpy(name, dev_name(dev), NAME_SIZE);
2470 /* are we a "%s.%d" name (platform and SPI components) */
2471 found = strstr(name, dev->driver->name);
2474 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2476 /* discard ID from name if ID == -1 */
2478 found[strlen(dev->driver->name)] = '\0';
2482 /* I2C component devices are named "bus-addr" */
2483 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2484 char tmp[NAME_SIZE];
2486 /* create unique ID number from I2C addr and bus */
2487 *id = ((id1 & 0xffff) << 16) + id2;
2489 /* sanitize component name for DAI link creation */
2490 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2491 strlcpy(name, tmp, NAME_SIZE);
2496 return kstrdup(name, GFP_KERNEL);
2500 * Simplify DAI link naming for single devices with multiple DAIs by removing
2501 * any ".-1" and using the DAI name (instead of device name).
2503 static inline char *fmt_multiple_name(struct device *dev,
2504 struct snd_soc_dai_driver *dai_drv)
2506 if (dai_drv->name == NULL) {
2508 "ASoC: error - multiple DAI %s registered with no name\n",
2513 return kstrdup(dai_drv->name, GFP_KERNEL);
2517 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2519 * @component: The component for which the DAIs should be unregistered
2521 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2523 struct snd_soc_dai *dai, *_dai;
2525 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2526 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2528 list_del(&dai->list);
2535 * snd_soc_register_dais - Register a DAI with the ASoC core
2537 * @component: The component the DAIs are registered for
2538 * @dai_drv: DAI driver to use for the DAIs
2539 * @count: Number of DAIs
2540 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
2543 static int snd_soc_register_dais(struct snd_soc_component *component,
2544 struct snd_soc_dai_driver *dai_drv, size_t count,
2545 bool legacy_dai_naming)
2547 struct device *dev = component->dev;
2548 struct snd_soc_dai *dai;
2552 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
2554 component->dai_drv = dai_drv;
2555 component->num_dai = count;
2557 for (i = 0; i < count; i++) {
2559 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2566 * Back in the old days when we still had component-less DAIs,
2567 * instead of having a static name, component-less DAIs would
2568 * inherit the name of the parent device so it is possible to
2569 * register multiple instances of the DAI. We still need to keep
2570 * the same naming style even though those DAIs are not
2571 * component-less anymore.
2573 if (count == 1 && legacy_dai_naming) {
2574 dai->name = fmt_single_name(dev, &dai->id);
2576 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
2578 dai->id = dai_drv[i].id;
2582 if (dai->name == NULL) {
2588 dai->component = component;
2590 dai->driver = &dai_drv[i];
2591 if (!dai->driver->ops)
2592 dai->driver->ops = &null_dai_ops;
2594 list_add(&dai->list, &component->dai_list);
2596 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2602 snd_soc_unregister_dais(component);
2607 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2608 enum snd_soc_dapm_type type, int subseq)
2610 struct snd_soc_component *component = dapm->component;
2612 component->driver->seq_notifier(component, type, subseq);
2615 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
2618 struct snd_soc_component *component = dapm->component;
2620 return component->driver->stream_event(component, event);
2623 static int snd_soc_component_initialize(struct snd_soc_component *component,
2624 const struct snd_soc_component_driver *driver, struct device *dev)
2626 struct snd_soc_dapm_context *dapm;
2628 component->name = fmt_single_name(dev, &component->id);
2629 if (!component->name) {
2630 dev_err(dev, "ASoC: Failed to allocate name\n");
2634 component->dev = dev;
2635 component->driver = driver;
2636 component->probe = component->driver->probe;
2637 component->remove = component->driver->remove;
2639 if (!component->dapm_ptr)
2640 component->dapm_ptr = &component->dapm;
2642 dapm = component->dapm_ptr;
2644 dapm->component = component;
2645 dapm->bias_level = SND_SOC_BIAS_OFF;
2646 dapm->idle_bias_off = true;
2647 if (driver->seq_notifier)
2648 dapm->seq_notifier = snd_soc_component_seq_notifier;
2649 if (driver->stream_event)
2650 dapm->stream_event = snd_soc_component_stream_event;
2652 component->controls = driver->controls;
2653 component->num_controls = driver->num_controls;
2654 component->dapm_widgets = driver->dapm_widgets;
2655 component->num_dapm_widgets = driver->num_dapm_widgets;
2656 component->dapm_routes = driver->dapm_routes;
2657 component->num_dapm_routes = driver->num_dapm_routes;
2659 INIT_LIST_HEAD(&component->dai_list);
2660 mutex_init(&component->io_mutex);
2665 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2667 int val_bytes = regmap_get_val_bytes(component->regmap);
2669 /* Errors are legitimate for non-integer byte multiples */
2671 component->val_bytes = val_bytes;
2674 #ifdef CONFIG_REGMAP
2677 * snd_soc_component_init_regmap() - Initialize regmap instance for the component
2678 * @component: The component for which to initialize the regmap instance
2679 * @regmap: The regmap instance that should be used by the component
2681 * This function allows deferred assignment of the regmap instance that is
2682 * associated with the component. Only use this if the regmap instance is not
2683 * yet ready when the component is registered. The function must also be called
2684 * before the first IO attempt of the component.
2686 void snd_soc_component_init_regmap(struct snd_soc_component *component,
2687 struct regmap *regmap)
2689 component->regmap = regmap;
2690 snd_soc_component_setup_regmap(component);
2692 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2695 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
2696 * @component: The component for which to de-initialize the regmap instance
2698 * Calls regmap_exit() on the regmap instance associated to the component and
2699 * removes the regmap instance from the component.
2701 * This function should only be used if snd_soc_component_init_regmap() was used
2702 * to initialize the regmap instance.
2704 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2706 regmap_exit(component->regmap);
2707 component->regmap = NULL;
2709 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2713 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
2715 if (!component->write && !component->read) {
2716 if (!component->regmap)
2717 component->regmap = dev_get_regmap(component->dev, NULL);
2718 if (component->regmap)
2719 snd_soc_component_setup_regmap(component);
2722 list_add(&component->list, &component_list);
2725 static void snd_soc_component_add(struct snd_soc_component *component)
2727 mutex_lock(&client_mutex);
2728 snd_soc_component_add_unlocked(component);
2729 mutex_unlock(&client_mutex);
2732 static void snd_soc_component_cleanup(struct snd_soc_component *component)
2734 snd_soc_unregister_dais(component);
2735 kfree(component->name);
2738 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
2740 list_del(&component->list);
2743 int snd_soc_register_component(struct device *dev,
2744 const struct snd_soc_component_driver *cmpnt_drv,
2745 struct snd_soc_dai_driver *dai_drv,
2748 struct snd_soc_component *cmpnt;
2751 cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
2753 dev_err(dev, "ASoC: Failed to allocate memory\n");
2757 ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
2761 cmpnt->ignore_pmdown_time = true;
2762 cmpnt->registered_as_component = true;
2764 ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
2766 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
2770 snd_soc_component_add(cmpnt);
2775 snd_soc_component_cleanup(cmpnt);
2780 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2783 * snd_soc_unregister_component - Unregister a component from the ASoC core
2786 void snd_soc_unregister_component(struct device *dev)
2788 struct snd_soc_component *cmpnt;
2790 mutex_lock(&client_mutex);
2791 list_for_each_entry(cmpnt, &component_list, list) {
2792 if (dev == cmpnt->dev && cmpnt->registered_as_component)
2795 mutex_unlock(&client_mutex);
2799 snd_soc_component_del_unlocked(cmpnt);
2800 mutex_unlock(&client_mutex);
2801 snd_soc_component_cleanup(cmpnt);
2804 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2806 static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
2808 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2810 return platform->driver->probe(platform);
2813 static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
2815 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2817 platform->driver->remove(platform);
2821 * snd_soc_add_platform - Add a platform to the ASoC core
2822 * @dev: The parent device for the platform
2823 * @platform: The platform to add
2824 * @platform_driver: The driver for the platform
2826 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
2827 const struct snd_soc_platform_driver *platform_drv)
2831 ret = snd_soc_component_initialize(&platform->component,
2832 &platform_drv->component_driver, dev);
2836 platform->dev = dev;
2837 platform->driver = platform_drv;
2839 if (platform_drv->probe)
2840 platform->component.probe = snd_soc_platform_drv_probe;
2841 if (platform_drv->remove)
2842 platform->component.remove = snd_soc_platform_drv_remove;
2844 #ifdef CONFIG_DEBUG_FS
2845 platform->component.debugfs_prefix = "platform";
2848 mutex_lock(&client_mutex);
2849 snd_soc_component_add_unlocked(&platform->component);
2850 list_add(&platform->list, &platform_list);
2851 mutex_unlock(&client_mutex);
2853 dev_dbg(dev, "ASoC: Registered platform '%s'\n",
2854 platform->component.name);
2858 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
2861 * snd_soc_register_platform - Register a platform with the ASoC core
2863 * @platform: platform to register
2865 int snd_soc_register_platform(struct device *dev,
2866 const struct snd_soc_platform_driver *platform_drv)
2868 struct snd_soc_platform *platform;
2871 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
2873 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
2874 if (platform == NULL)
2877 ret = snd_soc_add_platform(dev, platform, platform_drv);
2883 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2886 * snd_soc_remove_platform - Remove a platform from the ASoC core
2887 * @platform: the platform to remove
2889 void snd_soc_remove_platform(struct snd_soc_platform *platform)
2892 mutex_lock(&client_mutex);
2893 list_del(&platform->list);
2894 snd_soc_component_del_unlocked(&platform->component);
2895 mutex_unlock(&client_mutex);
2897 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
2898 platform->component.name);
2900 snd_soc_component_cleanup(&platform->component);
2902 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
2904 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
2906 struct snd_soc_platform *platform;
2908 mutex_lock(&client_mutex);
2909 list_for_each_entry(platform, &platform_list, list) {
2910 if (dev == platform->dev) {
2911 mutex_unlock(&client_mutex);
2915 mutex_unlock(&client_mutex);
2919 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
2922 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2924 * @platform: platform to unregister
2926 void snd_soc_unregister_platform(struct device *dev)
2928 struct snd_soc_platform *platform;
2930 platform = snd_soc_lookup_platform(dev);
2934 snd_soc_remove_platform(platform);
2937 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2939 static u64 codec_format_map[] = {
2940 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2941 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2942 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2943 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2944 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2945 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2946 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2947 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2948 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2949 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2950 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2951 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2952 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2953 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2954 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2955 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2958 /* Fix up the DAI formats for endianness: codecs don't actually see
2959 * the endianness of the data but we're using the CPU format
2960 * definitions which do need to include endianness so we ensure that
2961 * codec DAIs always have both big and little endian variants set.
2963 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2967 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2968 if (stream->formats & codec_format_map[i])
2969 stream->formats |= codec_format_map[i];
2972 static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
2974 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2976 return codec->driver->probe(codec);
2979 static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
2981 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2983 codec->driver->remove(codec);
2986 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
2987 unsigned int reg, unsigned int val)
2989 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2991 return codec->driver->write(codec, reg, val);
2994 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
2995 unsigned int reg, unsigned int *val)
2997 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2999 *val = codec->driver->read(codec, reg);
3004 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
3005 enum snd_soc_bias_level level)
3007 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
3009 return codec->driver->set_bias_level(codec, level);
3013 * snd_soc_register_codec - Register a codec with the ASoC core
3015 * @codec: codec to register
3017 int snd_soc_register_codec(struct device *dev,
3018 const struct snd_soc_codec_driver *codec_drv,
3019 struct snd_soc_dai_driver *dai_drv,
3022 struct snd_soc_codec *codec;
3023 struct snd_soc_dai *dai;
3026 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3028 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3032 codec->component.dapm_ptr = &codec->dapm;
3033 codec->component.codec = codec;
3035 ret = snd_soc_component_initialize(&codec->component,
3036 &codec_drv->component_driver, dev);
3040 if (codec_drv->controls) {
3041 codec->component.controls = codec_drv->controls;
3042 codec->component.num_controls = codec_drv->num_controls;
3044 if (codec_drv->dapm_widgets) {
3045 codec->component.dapm_widgets = codec_drv->dapm_widgets;
3046 codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
3048 if (codec_drv->dapm_routes) {
3049 codec->component.dapm_routes = codec_drv->dapm_routes;
3050 codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
3053 if (codec_drv->probe)
3054 codec->component.probe = snd_soc_codec_drv_probe;
3055 if (codec_drv->remove)
3056 codec->component.remove = snd_soc_codec_drv_remove;
3057 if (codec_drv->write)
3058 codec->component.write = snd_soc_codec_drv_write;
3059 if (codec_drv->read)
3060 codec->component.read = snd_soc_codec_drv_read;
3061 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3062 codec->dapm.idle_bias_off = codec_drv->idle_bias_off;
3063 codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off;
3064 if (codec_drv->seq_notifier)
3065 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3066 if (codec_drv->set_bias_level)
3067 codec->dapm.set_bias_level = snd_soc_codec_set_bias_level;
3069 codec->driver = codec_drv;
3070 codec->component.val_bytes = codec_drv->reg_word_size;
3072 #ifdef CONFIG_DEBUG_FS
3073 codec->component.init_debugfs = soc_init_codec_debugfs;
3074 codec->component.debugfs_prefix = "codec";
3077 if (codec_drv->get_regmap)
3078 codec->component.regmap = codec_drv->get_regmap(dev);
3080 for (i = 0; i < num_dai; i++) {
3081 fixup_codec_formats(&dai_drv[i].playback);
3082 fixup_codec_formats(&dai_drv[i].capture);
3085 ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3087 dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
3091 list_for_each_entry(dai, &codec->component.dai_list, list)
3094 mutex_lock(&client_mutex);
3095 snd_soc_component_add_unlocked(&codec->component);
3096 list_add(&codec->list, &codec_list);
3097 mutex_unlock(&client_mutex);
3099 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3100 codec->component.name);
3104 snd_soc_component_cleanup(&codec->component);
3109 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3112 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3114 * @codec: codec to unregister
3116 void snd_soc_unregister_codec(struct device *dev)
3118 struct snd_soc_codec *codec;
3120 mutex_lock(&client_mutex);
3121 list_for_each_entry(codec, &codec_list, list) {
3122 if (dev == codec->dev)
3125 mutex_unlock(&client_mutex);
3129 list_del(&codec->list);
3130 snd_soc_component_del_unlocked(&codec->component);
3131 mutex_unlock(&client_mutex);
3133 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3134 codec->component.name);
3136 snd_soc_component_cleanup(&codec->component);
3137 snd_soc_cache_exit(codec);
3140 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3142 /* Retrieve a card's name from device tree */
3143 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3144 const char *propname)
3146 struct device_node *np;
3150 pr_err("card->dev is not set before calling %s\n", __func__);
3154 np = card->dev->of_node;
3156 ret = of_property_read_string_index(np, propname, 0, &card->name);
3158 * EINVAL means the property does not exist. This is fine providing
3159 * card->name was previously set, which is checked later in
3160 * snd_soc_register_card.
3162 if (ret < 0 && ret != -EINVAL) {
3164 "ASoC: Property '%s' could not be read: %d\n",
3171 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3173 static const struct snd_soc_dapm_widget simple_widgets[] = {
3174 SND_SOC_DAPM_MIC("Microphone", NULL),
3175 SND_SOC_DAPM_LINE("Line", NULL),
3176 SND_SOC_DAPM_HP("Headphone", NULL),
3177 SND_SOC_DAPM_SPK("Speaker", NULL),
3180 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3181 const char *propname)
3183 struct device_node *np = card->dev->of_node;
3184 struct snd_soc_dapm_widget *widgets;
3185 const char *template, *wname;
3186 int i, j, num_widgets, ret;
3188 num_widgets = of_property_count_strings(np, propname);
3189 if (num_widgets < 0) {
3191 "ASoC: Property '%s' does not exist\n", propname);
3194 if (num_widgets & 1) {
3196 "ASoC: Property '%s' length is not even\n", propname);
3202 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3207 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3211 "ASoC: Could not allocate memory for widgets\n");
3215 for (i = 0; i < num_widgets; i++) {
3216 ret = of_property_read_string_index(np, propname,
3220 "ASoC: Property '%s' index %d read error:%d\n",
3221 propname, 2 * i, ret);
3225 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3226 if (!strncmp(template, simple_widgets[j].name,
3227 strlen(simple_widgets[j].name))) {
3228 widgets[i] = simple_widgets[j];
3233 if (j >= ARRAY_SIZE(simple_widgets)) {
3235 "ASoC: DAPM widget '%s' is not supported\n",
3240 ret = of_property_read_string_index(np, propname,
3245 "ASoC: Property '%s' index %d read error:%d\n",
3246 propname, (2 * i) + 1, ret);
3250 widgets[i].name = wname;
3253 card->of_dapm_widgets = widgets;
3254 card->num_of_dapm_widgets = num_widgets;
3258 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3260 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3261 unsigned int *slots,
3262 unsigned int *slot_width)
3267 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3268 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3276 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3277 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3287 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3289 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3290 const char *propname)
3292 struct device_node *np = card->dev->of_node;
3294 struct snd_soc_dapm_route *routes;
3297 num_routes = of_property_count_strings(np, propname);
3298 if (num_routes < 0 || num_routes & 1) {
3300 "ASoC: Property '%s' does not exist or its length is not even\n",
3306 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3311 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3315 "ASoC: Could not allocate DAPM route table\n");
3319 for (i = 0; i < num_routes; i++) {
3320 ret = of_property_read_string_index(np, propname,
3321 2 * i, &routes[i].sink);
3324 "ASoC: Property '%s' index %d could not be read: %d\n",
3325 propname, 2 * i, ret);
3328 ret = of_property_read_string_index(np, propname,
3329 (2 * i) + 1, &routes[i].source);
3332 "ASoC: Property '%s' index %d could not be read: %d\n",
3333 propname, (2 * i) + 1, ret);
3338 card->num_of_dapm_routes = num_routes;
3339 card->of_dapm_routes = routes;
3343 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3345 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3347 struct device_node **bitclkmaster,
3348 struct device_node **framemaster)
3352 unsigned int format = 0;
3358 } of_fmt_table[] = {
3359 { "i2s", SND_SOC_DAIFMT_I2S },
3360 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3361 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3362 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3363 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3364 { "ac97", SND_SOC_DAIFMT_AC97 },
3365 { "pdm", SND_SOC_DAIFMT_PDM},
3366 { "msb", SND_SOC_DAIFMT_MSB },
3367 { "lsb", SND_SOC_DAIFMT_LSB },
3374 * check "[prefix]format = xxx"
3375 * SND_SOC_DAIFMT_FORMAT_MASK area
3377 snprintf(prop, sizeof(prop), "%sformat", prefix);
3378 ret = of_property_read_string(np, prop, &str);
3380 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3381 if (strcmp(str, of_fmt_table[i].name) == 0) {
3382 format |= of_fmt_table[i].val;
3389 * check "[prefix]continuous-clock"
3390 * SND_SOC_DAIFMT_CLOCK_MASK area
3392 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3393 if (of_get_property(np, prop, NULL))
3394 format |= SND_SOC_DAIFMT_CONT;
3396 format |= SND_SOC_DAIFMT_GATED;
3399 * check "[prefix]bitclock-inversion"
3400 * check "[prefix]frame-inversion"
3401 * SND_SOC_DAIFMT_INV_MASK area
3403 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3404 bit = !!of_get_property(np, prop, NULL);
3406 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3407 frame = !!of_get_property(np, prop, NULL);
3409 switch ((bit << 4) + frame) {
3411 format |= SND_SOC_DAIFMT_IB_IF;
3414 format |= SND_SOC_DAIFMT_IB_NF;
3417 format |= SND_SOC_DAIFMT_NB_IF;
3420 /* SND_SOC_DAIFMT_NB_NF is default */
3425 * check "[prefix]bitclock-master"
3426 * check "[prefix]frame-master"
3427 * SND_SOC_DAIFMT_MASTER_MASK area
3429 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3430 bit = !!of_get_property(np, prop, NULL);
3431 if (bit && bitclkmaster)
3432 *bitclkmaster = of_parse_phandle(np, prop, 0);
3434 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3435 frame = !!of_get_property(np, prop, NULL);
3436 if (frame && framemaster)
3437 *framemaster = of_parse_phandle(np, prop, 0);
3439 switch ((bit << 4) + frame) {
3441 format |= SND_SOC_DAIFMT_CBM_CFM;
3444 format |= SND_SOC_DAIFMT_CBM_CFS;
3447 format |= SND_SOC_DAIFMT_CBS_CFM;
3450 format |= SND_SOC_DAIFMT_CBS_CFS;
3456 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3458 static int snd_soc_get_dai_name(struct of_phandle_args *args,
3459 const char **dai_name)
3461 struct snd_soc_component *pos;
3462 int ret = -EPROBE_DEFER;
3464 mutex_lock(&client_mutex);
3465 list_for_each_entry(pos, &component_list, list) {
3466 if (pos->dev->of_node != args->np)
3469 if (pos->driver->of_xlate_dai_name) {
3470 ret = pos->driver->of_xlate_dai_name(pos,
3476 switch (args->args_count) {
3478 id = 0; /* same as dai_drv[0] */
3488 if (id < 0 || id >= pos->num_dai) {
3495 *dai_name = pos->dai_drv[id].name;
3497 *dai_name = pos->name;
3502 mutex_unlock(&client_mutex);
3506 int snd_soc_of_get_dai_name(struct device_node *of_node,
3507 const char **dai_name)
3509 struct of_phandle_args args;
3512 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3513 "#sound-dai-cells", 0, &args);
3517 ret = snd_soc_get_dai_name(&args, dai_name);
3519 of_node_put(args.np);
3523 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3526 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3528 * @of_node: Device node
3529 * @dai_link: DAI link
3531 * Builds an array of CODEC DAI components from the DAI link property
3533 * The array is set in the DAI link and the number of DAIs is set accordingly.
3534 * The device nodes in the array (of_node) must be dereferenced by the caller.
3536 * Returns 0 for success
3538 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3539 struct device_node *of_node,
3540 struct snd_soc_dai_link *dai_link)
3542 struct of_phandle_args args;
3543 struct snd_soc_dai_link_component *component;
3545 int index, num_codecs, ret;
3547 /* Count the number of CODECs */
3549 num_codecs = of_count_phandle_with_args(of_node, name,
3550 "#sound-dai-cells");
3551 if (num_codecs <= 0) {
3552 if (num_codecs == -ENOENT)
3553 dev_err(dev, "No 'sound-dai' property\n");
3555 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3558 component = devm_kzalloc(dev,
3559 sizeof *component * num_codecs,
3563 dai_link->codecs = component;
3564 dai_link->num_codecs = num_codecs;
3566 /* Parse the list */
3567 for (index = 0, component = dai_link->codecs;
3568 index < dai_link->num_codecs;
3569 index++, component++) {
3570 ret = of_parse_phandle_with_args(of_node, name,
3575 component->of_node = args.np;
3576 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3582 for (index = 0, component = dai_link->codecs;
3583 index < dai_link->num_codecs;
3584 index++, component++) {
3585 if (!component->of_node)
3587 of_node_put(component->of_node);
3588 component->of_node = NULL;
3590 dai_link->codecs = NULL;
3591 dai_link->num_codecs = 0;
3594 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3596 static int __init snd_soc_init(void)
3598 #ifdef CONFIG_DEBUG_FS
3599 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
3600 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3601 pr_warn("ASoC: Failed to create debugfs directory\n");
3602 snd_soc_debugfs_root = NULL;
3605 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3607 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
3609 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
3611 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3613 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3614 &platform_list_fops))
3615 pr_warn("ASoC: Failed to create platform list debugfs file\n");
3618 snd_soc_util_init();
3620 return platform_driver_register(&soc_driver);
3622 module_init(snd_soc_init);
3624 static void __exit snd_soc_exit(void)
3626 snd_soc_util_exit();
3628 #ifdef CONFIG_DEBUG_FS
3629 debugfs_remove_recursive(snd_soc_debugfs_root);
3631 platform_driver_unregister(&soc_driver);
3633 module_exit(snd_soc_exit);
3635 /* Module information */
3636 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3637 MODULE_DESCRIPTION("ALSA SoC Core");
3638 MODULE_LICENSE("GPL");
3639 MODULE_ALIAS("platform:soc-audio");