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/soc-topology.h>
44 #include <sound/initval.h>
46 #define CREATE_TRACE_POINTS
47 #include <trace/events/asoc.h>
51 #ifdef CONFIG_DEBUG_FS
52 struct dentry *snd_soc_debugfs_root;
53 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
56 static DEFINE_MUTEX(client_mutex);
57 static LIST_HEAD(platform_list);
58 static LIST_HEAD(codec_list);
59 static LIST_HEAD(component_list);
62 * This is a timeout to do a DAPM powerdown after a stream is closed().
63 * It can be used to eliminate pops between different playback streams, e.g.
64 * between two audio tracks.
66 static int pmdown_time = 5000;
67 module_param(pmdown_time, int, 0);
68 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
70 /* returns the minimum number of bytes needed to represent
71 * a particular given value */
72 static int min_bytes_needed(unsigned long val)
77 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
80 c = (sizeof val * 8) - c;
88 /* fill buf which is 'len' bytes with a formatted
89 * string of the form 'reg: value\n' */
90 static int format_register_str(struct snd_soc_codec *codec,
91 unsigned int reg, char *buf, size_t len)
93 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
94 int regsize = codec->driver->reg_word_size * 2;
97 /* +2 for ': ' and + 1 for '\n' */
98 if (wordsize + regsize + 2 + 1 != len)
101 sprintf(buf, "%.*x: ", wordsize, reg);
104 ret = snd_soc_read(codec, reg);
106 memset(buf, 'X', regsize);
108 sprintf(buf, "%.*x", regsize, ret);
110 /* no NUL-termination needed */
114 /* codec register dump */
115 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
116 size_t count, loff_t pos)
119 int wordsize, regsize;
124 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
125 regsize = codec->driver->reg_word_size * 2;
127 len = wordsize + regsize + 2 + 1;
129 if (!codec->driver->reg_cache_size)
132 if (codec->driver->reg_cache_step)
133 step = codec->driver->reg_cache_step;
135 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
136 /* only support larger than PAGE_SIZE bytes debugfs
137 * entries for the default case */
139 if (total + len >= count - 1)
141 format_register_str(codec, i, buf + total, len);
147 total = min(total, count - 1);
152 static ssize_t codec_reg_show(struct device *dev,
153 struct device_attribute *attr, char *buf)
155 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
157 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
160 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
162 static ssize_t pmdown_time_show(struct device *dev,
163 struct device_attribute *attr, char *buf)
165 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
167 return sprintf(buf, "%ld\n", rtd->pmdown_time);
170 static ssize_t pmdown_time_set(struct device *dev,
171 struct device_attribute *attr,
172 const char *buf, size_t count)
174 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
177 ret = kstrtol(buf, 10, &rtd->pmdown_time);
184 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
186 static struct attribute *soc_dev_attrs[] = {
187 &dev_attr_codec_reg.attr,
188 &dev_attr_pmdown_time.attr,
192 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
193 struct attribute *attr, int idx)
195 struct device *dev = kobj_to_dev(kobj);
196 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
198 if (attr == &dev_attr_pmdown_time.attr)
199 return attr->mode; /* always visible */
200 return rtd->codec ? attr->mode : 0; /* enabled only with codec */
203 static const struct attribute_group soc_dapm_dev_group = {
204 .attrs = soc_dapm_dev_attrs,
205 .is_visible = soc_dev_attr_is_visible,
208 static const struct attribute_group soc_dev_roup = {
209 .attrs = soc_dev_attrs,
210 .is_visible = soc_dev_attr_is_visible,
213 static const struct attribute_group *soc_dev_attr_groups[] = {
219 #ifdef CONFIG_DEBUG_FS
220 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
221 size_t count, loff_t *ppos)
224 struct snd_soc_codec *codec = file->private_data;
227 if (*ppos < 0 || !count)
230 buf = kmalloc(count, GFP_KERNEL);
234 ret = soc_codec_reg_show(codec, buf, count, *ppos);
236 if (copy_to_user(user_buf, buf, ret)) {
247 static ssize_t codec_reg_write_file(struct file *file,
248 const char __user *user_buf, size_t count, loff_t *ppos)
253 unsigned long reg, value;
254 struct snd_soc_codec *codec = file->private_data;
257 buf_size = min(count, (sizeof(buf)-1));
258 if (copy_from_user(buf, user_buf, buf_size))
262 while (*start == ' ')
264 reg = simple_strtoul(start, &start, 16);
265 while (*start == ' ')
267 ret = kstrtoul(start, 16, &value);
271 /* Userspace has been fiddling around behind the kernel's back */
272 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
274 snd_soc_write(codec, reg, value);
278 static const struct file_operations codec_reg_fops = {
280 .read = codec_reg_read_file,
281 .write = codec_reg_write_file,
282 .llseek = default_llseek,
285 static void soc_init_component_debugfs(struct snd_soc_component *component)
287 if (!component->card->debugfs_card_root)
290 if (component->debugfs_prefix) {
293 name = kasprintf(GFP_KERNEL, "%s:%s",
294 component->debugfs_prefix, component->name);
296 component->debugfs_root = debugfs_create_dir(name,
297 component->card->debugfs_card_root);
301 component->debugfs_root = debugfs_create_dir(component->name,
302 component->card->debugfs_card_root);
305 if (!component->debugfs_root) {
306 dev_warn(component->dev,
307 "ASoC: Failed to create component debugfs directory\n");
311 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
312 component->debugfs_root);
314 if (component->init_debugfs)
315 component->init_debugfs(component);
318 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
320 debugfs_remove_recursive(component->debugfs_root);
323 static void soc_init_codec_debugfs(struct snd_soc_component *component)
325 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
327 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
328 codec->component.debugfs_root,
329 codec, &codec_reg_fops);
330 if (!codec->debugfs_reg)
332 "ASoC: Failed to create codec register debugfs file\n");
335 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
336 size_t count, loff_t *ppos)
338 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
339 ssize_t len, ret = 0;
340 struct snd_soc_codec *codec;
345 mutex_lock(&client_mutex);
347 list_for_each_entry(codec, &codec_list, list) {
348 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
349 codec->component.name);
352 if (ret > PAGE_SIZE) {
358 mutex_unlock(&client_mutex);
361 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
368 static const struct file_operations codec_list_fops = {
369 .read = codec_list_read_file,
370 .llseek = default_llseek,/* read accesses f_pos */
373 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
374 size_t count, loff_t *ppos)
376 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
377 ssize_t len, ret = 0;
378 struct snd_soc_component *component;
379 struct snd_soc_dai *dai;
384 mutex_lock(&client_mutex);
386 list_for_each_entry(component, &component_list, list) {
387 list_for_each_entry(dai, &component->dai_list, list) {
388 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
392 if (ret > PAGE_SIZE) {
399 mutex_unlock(&client_mutex);
401 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
408 static const struct file_operations dai_list_fops = {
409 .read = dai_list_read_file,
410 .llseek = default_llseek,/* read accesses f_pos */
413 static ssize_t platform_list_read_file(struct file *file,
414 char __user *user_buf,
415 size_t count, loff_t *ppos)
417 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
418 ssize_t len, ret = 0;
419 struct snd_soc_platform *platform;
424 mutex_lock(&client_mutex);
426 list_for_each_entry(platform, &platform_list, list) {
427 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
428 platform->component.name);
431 if (ret > PAGE_SIZE) {
437 mutex_unlock(&client_mutex);
439 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
446 static const struct file_operations platform_list_fops = {
447 .read = platform_list_read_file,
448 .llseek = default_llseek,/* read accesses f_pos */
451 static void soc_init_card_debugfs(struct snd_soc_card *card)
453 if (!snd_soc_debugfs_root)
456 card->debugfs_card_root = debugfs_create_dir(card->name,
457 snd_soc_debugfs_root);
458 if (!card->debugfs_card_root) {
460 "ASoC: Failed to create card debugfs directory\n");
464 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
465 card->debugfs_card_root,
467 if (!card->debugfs_pop_time)
469 "ASoC: Failed to create pop time debugfs file\n");
472 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
474 debugfs_remove_recursive(card->debugfs_card_root);
478 static void snd_soc_debugfs_init(void)
480 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
481 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
482 pr_warn("ASoC: Failed to create debugfs directory\n");
483 snd_soc_debugfs_root = NULL;
487 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
489 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
491 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
493 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
495 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
496 &platform_list_fops))
497 pr_warn("ASoC: Failed to create platform list debugfs file\n");
500 static void snd_soc_debugfs_exit(void)
502 debugfs_remove_recursive(snd_soc_debugfs_root);
507 #define soc_init_codec_debugfs NULL
509 static inline void soc_init_component_debugfs(
510 struct snd_soc_component *component)
514 static inline void soc_cleanup_component_debugfs(
515 struct snd_soc_component *component)
519 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
523 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
527 static inline void snd_soc_debugfs_init(void)
531 static inline void snd_soc_debugfs_exit(void)
537 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
538 const char *dai_link, int stream)
542 for (i = 0; i < card->num_links; i++) {
543 if (card->rtd[i].dai_link->no_pcm &&
544 !strcmp(card->rtd[i].dai_link->name, dai_link))
545 return card->rtd[i].pcm->streams[stream].substream;
547 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
550 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
552 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
553 const char *dai_link)
557 for (i = 0; i < card->num_links; i++) {
558 if (!strcmp(card->rtd[i].dai_link->name, dai_link))
559 return &card->rtd[i];
561 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
564 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
566 static void codec2codec_close_delayed_work(struct work_struct *work)
568 /* Currently nothing to do for c2c links
569 * Since c2c links are internal nodes in the DAPM graph and
570 * don't interface with the outside world or application layer
571 * we don't have to do any special handling on close.
575 #ifdef CONFIG_PM_SLEEP
576 /* powers down audio subsystem for suspend */
577 int snd_soc_suspend(struct device *dev)
579 struct snd_soc_card *card = dev_get_drvdata(dev);
580 struct snd_soc_codec *codec;
583 /* If the card is not initialized yet there is nothing to do */
584 if (!card->instantiated)
587 /* Due to the resume being scheduled into a workqueue we could
588 * suspend before that's finished - wait for it to complete.
590 snd_power_lock(card->snd_card);
591 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
592 snd_power_unlock(card->snd_card);
594 /* we're going to block userspace touching us until resume completes */
595 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
597 /* mute any active DACs */
598 for (i = 0; i < card->num_rtd; i++) {
600 if (card->rtd[i].dai_link->ignore_suspend)
603 for (j = 0; j < card->rtd[i].num_codecs; j++) {
604 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
605 struct snd_soc_dai_driver *drv = dai->driver;
607 if (drv->ops->digital_mute && dai->playback_active)
608 drv->ops->digital_mute(dai, 1);
612 /* suspend all pcms */
613 for (i = 0; i < card->num_rtd; i++) {
614 if (card->rtd[i].dai_link->ignore_suspend)
617 snd_pcm_suspend_all(card->rtd[i].pcm);
620 if (card->suspend_pre)
621 card->suspend_pre(card);
623 for (i = 0; i < card->num_rtd; i++) {
624 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
626 if (card->rtd[i].dai_link->ignore_suspend)
629 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
630 cpu_dai->driver->suspend(cpu_dai);
633 /* close any waiting streams */
634 for (i = 0; i < card->num_rtd; i++)
635 flush_delayed_work(&card->rtd[i].delayed_work);
637 for (i = 0; i < card->num_rtd; i++) {
639 if (card->rtd[i].dai_link->ignore_suspend)
642 snd_soc_dapm_stream_event(&card->rtd[i],
643 SNDRV_PCM_STREAM_PLAYBACK,
644 SND_SOC_DAPM_STREAM_SUSPEND);
646 snd_soc_dapm_stream_event(&card->rtd[i],
647 SNDRV_PCM_STREAM_CAPTURE,
648 SND_SOC_DAPM_STREAM_SUSPEND);
651 /* Recheck all endpoints too, their state is affected by suspend */
652 dapm_mark_endpoints_dirty(card);
653 snd_soc_dapm_sync(&card->dapm);
655 /* suspend all CODECs */
656 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
657 struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);
659 /* If there are paths active then the CODEC will be held with
660 * bias _ON and should not be suspended. */
661 if (!codec->suspended) {
662 switch (snd_soc_dapm_get_bias_level(dapm)) {
663 case SND_SOC_BIAS_STANDBY:
665 * If the CODEC is capable of idle
666 * bias off then being in STANDBY
667 * means it's doing something,
668 * otherwise fall through.
670 if (dapm->idle_bias_off) {
672 "ASoC: idle_bias_off CODEC on over suspend\n");
676 case SND_SOC_BIAS_OFF:
677 if (codec->driver->suspend)
678 codec->driver->suspend(codec);
679 codec->suspended = 1;
680 if (codec->component.regmap)
681 regcache_mark_dirty(codec->component.regmap);
682 /* deactivate pins to sleep state */
683 pinctrl_pm_select_sleep_state(codec->dev);
687 "ASoC: CODEC is on over suspend\n");
693 for (i = 0; i < card->num_rtd; i++) {
694 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
696 if (card->rtd[i].dai_link->ignore_suspend)
699 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
700 cpu_dai->driver->suspend(cpu_dai);
702 /* deactivate pins to sleep state */
703 pinctrl_pm_select_sleep_state(cpu_dai->dev);
706 if (card->suspend_post)
707 card->suspend_post(card);
711 EXPORT_SYMBOL_GPL(snd_soc_suspend);
713 /* deferred resume work, so resume can complete before we finished
714 * setting our codec back up, which can be very slow on I2C
716 static void soc_resume_deferred(struct work_struct *work)
718 struct snd_soc_card *card =
719 container_of(work, struct snd_soc_card, deferred_resume_work);
720 struct snd_soc_codec *codec;
723 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
724 * so userspace apps are blocked from touching us
727 dev_dbg(card->dev, "ASoC: starting resume work\n");
729 /* Bring us up into D2 so that DAPM starts enabling things */
730 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
732 if (card->resume_pre)
733 card->resume_pre(card);
735 /* resume control bus DAIs */
736 for (i = 0; i < card->num_rtd; i++) {
737 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
739 if (card->rtd[i].dai_link->ignore_suspend)
742 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
743 cpu_dai->driver->resume(cpu_dai);
746 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
747 if (codec->suspended) {
748 if (codec->driver->resume)
749 codec->driver->resume(codec);
750 codec->suspended = 0;
754 for (i = 0; i < card->num_rtd; i++) {
756 if (card->rtd[i].dai_link->ignore_suspend)
759 snd_soc_dapm_stream_event(&card->rtd[i],
760 SNDRV_PCM_STREAM_PLAYBACK,
761 SND_SOC_DAPM_STREAM_RESUME);
763 snd_soc_dapm_stream_event(&card->rtd[i],
764 SNDRV_PCM_STREAM_CAPTURE,
765 SND_SOC_DAPM_STREAM_RESUME);
768 /* unmute any active DACs */
769 for (i = 0; i < card->num_rtd; i++) {
771 if (card->rtd[i].dai_link->ignore_suspend)
774 for (j = 0; j < card->rtd[i].num_codecs; j++) {
775 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
776 struct snd_soc_dai_driver *drv = dai->driver;
778 if (drv->ops->digital_mute && dai->playback_active)
779 drv->ops->digital_mute(dai, 0);
783 for (i = 0; i < card->num_rtd; i++) {
784 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
786 if (card->rtd[i].dai_link->ignore_suspend)
789 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
790 cpu_dai->driver->resume(cpu_dai);
793 if (card->resume_post)
794 card->resume_post(card);
796 dev_dbg(card->dev, "ASoC: resume work completed\n");
798 /* userspace can access us now we are back as we were before */
799 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
801 /* Recheck all endpoints too, their state is affected by suspend */
802 dapm_mark_endpoints_dirty(card);
803 snd_soc_dapm_sync(&card->dapm);
806 /* powers up audio subsystem after a suspend */
807 int snd_soc_resume(struct device *dev)
809 struct snd_soc_card *card = dev_get_drvdata(dev);
810 bool bus_control = false;
813 /* If the card is not initialized yet there is nothing to do */
814 if (!card->instantiated)
817 /* activate pins from sleep state */
818 for (i = 0; i < card->num_rtd; i++) {
819 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
820 struct snd_soc_dai **codec_dais = rtd->codec_dais;
821 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
825 pinctrl_pm_select_default_state(cpu_dai->dev);
827 for (j = 0; j < rtd->num_codecs; j++) {
828 struct snd_soc_dai *codec_dai = codec_dais[j];
829 if (codec_dai->active)
830 pinctrl_pm_select_default_state(codec_dai->dev);
835 * DAIs that also act as the control bus master might have other drivers
836 * hanging off them so need to resume immediately. Other drivers don't
837 * have that problem and may take a substantial amount of time to resume
838 * due to I/O costs and anti-pop so handle them out of line.
840 for (i = 0; i < card->num_rtd; i++) {
841 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
842 bus_control |= cpu_dai->driver->bus_control;
845 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
846 soc_resume_deferred(&card->deferred_resume_work);
848 dev_dbg(dev, "ASoC: Scheduling resume work\n");
849 if (!schedule_work(&card->deferred_resume_work))
850 dev_err(dev, "ASoC: resume work item may be lost\n");
855 EXPORT_SYMBOL_GPL(snd_soc_resume);
857 #define snd_soc_suspend NULL
858 #define snd_soc_resume NULL
861 static const struct snd_soc_dai_ops null_dai_ops = {
864 static struct snd_soc_component *soc_find_component(
865 const struct device_node *of_node, const char *name)
867 struct snd_soc_component *component;
869 lockdep_assert_held(&client_mutex);
871 list_for_each_entry(component, &component_list, list) {
873 if (component->dev->of_node == of_node)
875 } else if (strcmp(component->name, name) == 0) {
883 static struct snd_soc_dai *snd_soc_find_dai(
884 const struct snd_soc_dai_link_component *dlc)
886 struct snd_soc_component *component;
887 struct snd_soc_dai *dai;
888 struct device_node *component_of_node;
890 lockdep_assert_held(&client_mutex);
892 /* Find CPU DAI from registered DAIs*/
893 list_for_each_entry(component, &component_list, list) {
894 component_of_node = component->dev->of_node;
895 if (!component_of_node && component->dev->parent)
896 component_of_node = component->dev->parent->of_node;
898 if (dlc->of_node && component_of_node != dlc->of_node)
900 if (dlc->name && strcmp(component->name, dlc->name))
902 list_for_each_entry(dai, &component->dai_list, list) {
903 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
913 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
915 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
916 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
917 struct snd_soc_dai_link_component *codecs = dai_link->codecs;
918 struct snd_soc_dai_link_component cpu_dai_component;
919 struct snd_soc_dai **codec_dais = rtd->codec_dais;
920 struct snd_soc_platform *platform;
921 const char *platform_name;
924 dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
926 cpu_dai_component.name = dai_link->cpu_name;
927 cpu_dai_component.of_node = dai_link->cpu_of_node;
928 cpu_dai_component.dai_name = dai_link->cpu_dai_name;
929 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
931 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
932 dai_link->cpu_dai_name);
933 return -EPROBE_DEFER;
936 rtd->num_codecs = dai_link->num_codecs;
938 /* Find CODEC from registered CODECs */
939 for (i = 0; i < rtd->num_codecs; i++) {
940 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
941 if (!codec_dais[i]) {
942 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
944 return -EPROBE_DEFER;
948 /* Single codec links expect codec and codec_dai in runtime data */
949 rtd->codec_dai = codec_dais[0];
950 rtd->codec = rtd->codec_dai->codec;
952 /* if there's no platform we match on the empty platform */
953 platform_name = dai_link->platform_name;
954 if (!platform_name && !dai_link->platform_of_node)
955 platform_name = "snd-soc-dummy";
957 /* find one from the set of registered platforms */
958 list_for_each_entry(platform, &platform_list, list) {
959 if (dai_link->platform_of_node) {
960 if (platform->dev->of_node !=
961 dai_link->platform_of_node)
964 if (strcmp(platform->component.name, platform_name))
968 rtd->platform = platform;
970 if (!rtd->platform) {
971 dev_err(card->dev, "ASoC: platform %s not registered\n",
972 dai_link->platform_name);
973 return -EPROBE_DEFER;
981 static void soc_remove_component(struct snd_soc_component *component)
983 if (!component->card)
986 /* This is a HACK and will be removed soon */
987 if (component->codec)
988 list_del(&component->codec->card_list);
990 if (component->remove)
991 component->remove(component);
993 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
995 soc_cleanup_component_debugfs(component);
996 component->card = NULL;
997 module_put(component->dev->driver->owner);
1000 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1004 if (dai && dai->probed &&
1005 dai->driver->remove_order == order) {
1006 if (dai->driver->remove) {
1007 err = dai->driver->remove(dai);
1010 "ASoC: failed to remove %s: %d\n",
1017 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
1019 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1022 /* unregister the rtd device */
1023 if (rtd->dev_registered) {
1024 device_unregister(rtd->dev);
1025 rtd->dev_registered = 0;
1028 /* remove the CODEC DAI */
1029 for (i = 0; i < rtd->num_codecs; i++)
1030 soc_remove_dai(rtd->codec_dais[i], order);
1032 soc_remove_dai(rtd->cpu_dai, order);
1035 static void soc_remove_link_components(struct snd_soc_card *card, int num,
1038 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1039 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1040 struct snd_soc_platform *platform = rtd->platform;
1041 struct snd_soc_component *component;
1044 /* remove the platform */
1045 if (platform && platform->component.driver->remove_order == order)
1046 soc_remove_component(&platform->component);
1048 /* remove the CODEC-side CODEC */
1049 for (i = 0; i < rtd->num_codecs; i++) {
1050 component = rtd->codec_dais[i]->component;
1051 if (component->driver->remove_order == order)
1052 soc_remove_component(component);
1055 /* remove any CPU-side CODEC */
1057 if (cpu_dai->component->driver->remove_order == order)
1058 soc_remove_component(cpu_dai->component);
1062 static void soc_remove_dai_links(struct snd_soc_card *card)
1066 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1068 for (dai = 0; dai < card->num_rtd; dai++)
1069 soc_remove_link_dais(card, dai, order);
1072 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1074 for (dai = 0; dai < card->num_rtd; dai++)
1075 soc_remove_link_components(card, dai, order);
1081 static void soc_set_name_prefix(struct snd_soc_card *card,
1082 struct snd_soc_component *component)
1086 if (card->codec_conf == NULL)
1089 for (i = 0; i < card->num_configs; i++) {
1090 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1091 if (map->of_node && component->dev->of_node != map->of_node)
1093 if (map->dev_name && strcmp(component->name, map->dev_name))
1095 component->name_prefix = map->name_prefix;
1100 static int soc_probe_component(struct snd_soc_card *card,
1101 struct snd_soc_component *component)
1103 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1104 struct snd_soc_dai *dai;
1107 if (!strcmp(component->name, "snd-soc-dummy"))
1110 if (component->card) {
1111 if (component->card != card) {
1112 dev_err(component->dev,
1113 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1114 card->name, component->card->name);
1120 if (!try_module_get(component->dev->driver->owner))
1123 component->card = card;
1125 soc_set_name_prefix(card, component);
1127 soc_init_component_debugfs(component);
1129 if (component->dapm_widgets) {
1130 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
1131 component->num_dapm_widgets);
1134 dev_err(component->dev,
1135 "Failed to create new controls %d\n", ret);
1140 list_for_each_entry(dai, &component->dai_list, list) {
1141 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1143 dev_err(component->dev,
1144 "Failed to create DAI widgets %d\n", ret);
1149 if (component->probe) {
1150 ret = component->probe(component);
1152 dev_err(component->dev,
1153 "ASoC: failed to probe component %d\n", ret);
1157 WARN(dapm->idle_bias_off &&
1158 dapm->bias_level != SND_SOC_BIAS_OFF,
1159 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1163 if (component->controls)
1164 snd_soc_add_component_controls(component, component->controls,
1165 component->num_controls);
1166 if (component->dapm_routes)
1167 snd_soc_dapm_add_routes(dapm, component->dapm_routes,
1168 component->num_dapm_routes);
1170 list_add(&dapm->list, &card->dapm_list);
1172 /* This is a HACK and will be removed soon */
1173 if (component->codec)
1174 list_add(&component->codec->card_list, &card->codec_dev_list);
1179 soc_cleanup_component_debugfs(component);
1180 component->card = NULL;
1181 module_put(component->dev->driver->owner);
1186 static void rtd_release(struct device *dev)
1191 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1196 /* register the rtd device */
1197 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1200 device_initialize(rtd->dev);
1201 rtd->dev->parent = rtd->card->dev;
1202 rtd->dev->release = rtd_release;
1203 rtd->dev->groups = soc_dev_attr_groups;
1204 dev_set_name(rtd->dev, "%s", name);
1205 dev_set_drvdata(rtd->dev, rtd);
1206 mutex_init(&rtd->pcm_mutex);
1207 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1208 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1209 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1210 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1211 ret = device_add(rtd->dev);
1213 /* calling put_device() here to free the rtd->dev */
1214 put_device(rtd->dev);
1215 dev_err(rtd->card->dev,
1216 "ASoC: failed to register runtime device: %d\n", ret);
1219 rtd->dev_registered = 1;
1223 static int soc_probe_link_components(struct snd_soc_card *card, int num,
1226 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1227 struct snd_soc_platform *platform = rtd->platform;
1228 struct snd_soc_component *component;
1231 /* probe the CPU-side component, if it is a CODEC */
1232 component = rtd->cpu_dai->component;
1233 if (component->driver->probe_order == order) {
1234 ret = soc_probe_component(card, component);
1239 /* probe the CODEC-side components */
1240 for (i = 0; i < rtd->num_codecs; i++) {
1241 component = rtd->codec_dais[i]->component;
1242 if (component->driver->probe_order == order) {
1243 ret = soc_probe_component(card, component);
1249 /* probe the platform */
1250 if (platform->component.driver->probe_order == order) {
1251 ret = soc_probe_component(card, &platform->component);
1259 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1263 if (!dai->probed && dai->driver->probe_order == order) {
1264 if (dai->driver->probe) {
1265 ret = dai->driver->probe(dai);
1268 "ASoC: failed to probe DAI %s: %d\n",
1280 static int soc_link_dai_widgets(struct snd_soc_card *card,
1281 struct snd_soc_dai_link *dai_link,
1282 struct snd_soc_pcm_runtime *rtd)
1284 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1285 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1286 struct snd_soc_dapm_widget *play_w, *capture_w;
1289 if (rtd->num_codecs > 1)
1290 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1292 /* link the DAI widgets */
1293 play_w = codec_dai->playback_widget;
1294 capture_w = cpu_dai->capture_widget;
1295 if (play_w && capture_w) {
1296 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1297 dai_link->num_params, capture_w,
1300 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1301 play_w->name, capture_w->name, ret);
1306 play_w = cpu_dai->playback_widget;
1307 capture_w = codec_dai->capture_widget;
1308 if (play_w && capture_w) {
1309 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1310 dai_link->num_params, capture_w,
1313 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1314 play_w->name, capture_w->name, ret);
1322 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1324 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1325 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1326 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1329 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1330 card->name, num, order);
1332 /* set default power off timeout */
1333 rtd->pmdown_time = pmdown_time;
1335 ret = soc_probe_dai(cpu_dai, order);
1339 /* probe the CODEC DAI */
1340 for (i = 0; i < rtd->num_codecs; i++) {
1341 ret = soc_probe_dai(rtd->codec_dais[i], order);
1346 /* complete DAI probe during last probe */
1347 if (order != SND_SOC_COMP_ORDER_LAST)
1350 /* do machine specific initialization */
1351 if (dai_link->init) {
1352 ret = dai_link->init(rtd);
1354 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1355 dai_link->name, ret);
1360 if (dai_link->dai_fmt)
1361 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1363 ret = soc_post_component_init(rtd, dai_link->name);
1367 #ifdef CONFIG_DEBUG_FS
1368 /* add DPCM sysfs entries */
1369 if (dai_link->dynamic)
1370 soc_dpcm_debugfs_add(rtd);
1373 if (cpu_dai->driver->compress_dai) {
1374 /*create compress_device"*/
1375 ret = soc_new_compress(rtd, num);
1377 dev_err(card->dev, "ASoC: can't create compress %s\n",
1378 dai_link->stream_name);
1383 if (!dai_link->params) {
1384 /* create the pcm */
1385 ret = soc_new_pcm(rtd, num);
1387 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1388 dai_link->stream_name, ret);
1392 INIT_DELAYED_WORK(&rtd->delayed_work,
1393 codec2codec_close_delayed_work);
1395 /* link the DAI widgets */
1396 ret = soc_link_dai_widgets(card, dai_link, rtd);
1405 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1407 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1408 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1409 const char *name = aux_dev->codec_name;
1411 rtd->component = soc_find_component(aux_dev->codec_of_node, name);
1412 if (!rtd->component) {
1413 if (aux_dev->codec_of_node)
1414 name = of_node_full_name(aux_dev->codec_of_node);
1416 dev_err(card->dev, "ASoC: %s not registered\n", name);
1417 return -EPROBE_DEFER;
1421 * Some places still reference rtd->codec, so we have to keep that
1422 * initialized if the component is a CODEC. Once all those references
1423 * have been removed, this code can be removed as well.
1425 rtd->codec = rtd->component->codec;
1430 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1432 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1433 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1436 ret = soc_probe_component(card, rtd->component);
1440 /* do machine specific initialization */
1441 if (aux_dev->init) {
1442 ret = aux_dev->init(rtd->component);
1444 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1445 aux_dev->name, ret);
1450 return soc_post_component_init(rtd, aux_dev->name);
1453 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1455 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1456 struct snd_soc_component *component = rtd->component;
1458 /* unregister the rtd device */
1459 if (rtd->dev_registered) {
1460 device_unregister(rtd->dev);
1461 rtd->dev_registered = 0;
1465 soc_remove_component(component);
1468 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1472 if (codec->cache_init)
1475 ret = snd_soc_cache_init(codec);
1478 "ASoC: Failed to set cache compression type: %d\n",
1482 codec->cache_init = 1;
1487 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1488 * @rtd: The runtime for which the DAI link format should be changed
1489 * @dai_fmt: The new DAI link format
1491 * This function updates the DAI link format for all DAIs connected to the DAI
1492 * link for the specified runtime.
1494 * Note: For setups with a static format set the dai_fmt field in the
1495 * corresponding snd_dai_link struct instead of using this function.
1497 * Returns 0 on success, otherwise a negative error code.
1499 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1500 unsigned int dai_fmt)
1502 struct snd_soc_dai **codec_dais = rtd->codec_dais;
1503 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1507 for (i = 0; i < rtd->num_codecs; i++) {
1508 struct snd_soc_dai *codec_dai = codec_dais[i];
1510 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1511 if (ret != 0 && ret != -ENOTSUPP) {
1512 dev_warn(codec_dai->dev,
1513 "ASoC: Failed to set DAI format: %d\n", ret);
1518 /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1519 if (cpu_dai->codec) {
1520 unsigned int inv_dai_fmt;
1522 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1523 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1524 case SND_SOC_DAIFMT_CBM_CFM:
1525 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1527 case SND_SOC_DAIFMT_CBM_CFS:
1528 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1530 case SND_SOC_DAIFMT_CBS_CFM:
1531 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1533 case SND_SOC_DAIFMT_CBS_CFS:
1534 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1538 dai_fmt = inv_dai_fmt;
1541 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1542 if (ret != 0 && ret != -ENOTSUPP) {
1543 dev_warn(cpu_dai->dev,
1544 "ASoC: Failed to set DAI format: %d\n", ret);
1550 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1552 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1554 struct snd_soc_codec *codec;
1557 mutex_lock(&client_mutex);
1558 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1561 for (i = 0; i < card->num_links; i++) {
1562 ret = soc_bind_dai_link(card, i);
1567 /* bind aux_devs too */
1568 for (i = 0; i < card->num_aux_devs; i++) {
1569 ret = soc_bind_aux_dev(card, i);
1574 /* initialize the register cache for each available codec */
1575 list_for_each_entry(codec, &codec_list, list) {
1576 if (codec->cache_init)
1578 ret = snd_soc_init_codec_cache(codec);
1583 /* card bind complete so register a sound card */
1584 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1585 card->owner, 0, &card->snd_card);
1588 "ASoC: can't create sound card for card %s: %d\n",
1593 soc_init_card_debugfs(card);
1595 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1596 card->dapm.dev = card->dev;
1597 card->dapm.card = card;
1598 list_add(&card->dapm.list, &card->dapm_list);
1600 #ifdef CONFIG_DEBUG_FS
1601 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1604 #ifdef CONFIG_PM_SLEEP
1605 /* deferred resume work */
1606 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1609 if (card->dapm_widgets)
1610 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1611 card->num_dapm_widgets);
1613 if (card->of_dapm_widgets)
1614 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
1615 card->num_of_dapm_widgets);
1617 /* initialise the sound card only once */
1619 ret = card->probe(card);
1621 goto card_probe_error;
1624 /* probe all components used by DAI links on this card */
1625 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1627 for (i = 0; i < card->num_links; i++) {
1628 ret = soc_probe_link_components(card, i, order);
1631 "ASoC: failed to instantiate card %d\n",
1638 /* probe all DAI links on this card */
1639 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1641 for (i = 0; i < card->num_links; i++) {
1642 ret = soc_probe_link_dais(card, i, order);
1645 "ASoC: failed to instantiate card %d\n",
1652 for (i = 0; i < card->num_aux_devs; i++) {
1653 ret = soc_probe_aux_dev(card, i);
1656 "ASoC: failed to add auxiliary devices %d\n",
1658 goto probe_aux_dev_err;
1662 snd_soc_dapm_link_dai_widgets(card);
1663 snd_soc_dapm_connect_dai_link_widgets(card);
1666 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1668 if (card->dapm_routes)
1669 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1670 card->num_dapm_routes);
1672 if (card->of_dapm_routes)
1673 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
1674 card->num_of_dapm_routes);
1676 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1678 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1679 "%s", card->long_name ? card->long_name : card->name);
1680 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1681 "%s", card->driver_name ? card->driver_name : card->name);
1682 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1683 switch (card->snd_card->driver[i]) {
1689 if (!isalnum(card->snd_card->driver[i]))
1690 card->snd_card->driver[i] = '_';
1695 if (card->late_probe) {
1696 ret = card->late_probe(card);
1698 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1700 goto probe_aux_dev_err;
1704 snd_soc_dapm_new_widgets(card);
1706 ret = snd_card_register(card->snd_card);
1708 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1710 goto probe_aux_dev_err;
1713 card->instantiated = 1;
1714 snd_soc_dapm_sync(&card->dapm);
1715 mutex_unlock(&card->mutex);
1716 mutex_unlock(&client_mutex);
1721 for (i = 0; i < card->num_aux_devs; i++)
1722 soc_remove_aux_dev(card, i);
1725 soc_remove_dai_links(card);
1731 snd_soc_dapm_free(&card->dapm);
1732 soc_cleanup_card_debugfs(card);
1733 snd_card_free(card->snd_card);
1736 mutex_unlock(&card->mutex);
1737 mutex_unlock(&client_mutex);
1742 /* probes a new socdev */
1743 static int soc_probe(struct platform_device *pdev)
1745 struct snd_soc_card *card = platform_get_drvdata(pdev);
1748 * no card, so machine driver should be registering card
1749 * we should not be here in that case so ret error
1754 dev_warn(&pdev->dev,
1755 "ASoC: machine %s should use snd_soc_register_card()\n",
1758 /* Bodge while we unpick instantiation */
1759 card->dev = &pdev->dev;
1761 return snd_soc_register_card(card);
1764 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1768 /* make sure any delayed work runs */
1769 for (i = 0; i < card->num_rtd; i++) {
1770 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1771 flush_delayed_work(&rtd->delayed_work);
1774 /* remove auxiliary devices */
1775 for (i = 0; i < card->num_aux_devs; i++)
1776 soc_remove_aux_dev(card, i);
1778 /* remove and free each DAI */
1779 soc_remove_dai_links(card);
1781 soc_cleanup_card_debugfs(card);
1783 /* remove the card */
1787 snd_soc_dapm_free(&card->dapm);
1789 snd_card_free(card->snd_card);
1794 /* removes a socdev */
1795 static int soc_remove(struct platform_device *pdev)
1797 struct snd_soc_card *card = platform_get_drvdata(pdev);
1799 snd_soc_unregister_card(card);
1803 int snd_soc_poweroff(struct device *dev)
1805 struct snd_soc_card *card = dev_get_drvdata(dev);
1808 if (!card->instantiated)
1811 /* Flush out pmdown_time work - we actually do want to run it
1812 * now, we're shutting down so no imminent restart. */
1813 for (i = 0; i < card->num_rtd; i++) {
1814 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1815 flush_delayed_work(&rtd->delayed_work);
1818 snd_soc_dapm_shutdown(card);
1820 /* deactivate pins to sleep state */
1821 for (i = 0; i < card->num_rtd; i++) {
1822 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1823 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1826 pinctrl_pm_select_sleep_state(cpu_dai->dev);
1827 for (j = 0; j < rtd->num_codecs; j++) {
1828 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
1829 pinctrl_pm_select_sleep_state(codec_dai->dev);
1835 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1837 const struct dev_pm_ops snd_soc_pm_ops = {
1838 .suspend = snd_soc_suspend,
1839 .resume = snd_soc_resume,
1840 .freeze = snd_soc_suspend,
1841 .thaw = snd_soc_resume,
1842 .poweroff = snd_soc_poweroff,
1843 .restore = snd_soc_resume,
1845 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1847 /* ASoC platform driver */
1848 static struct platform_driver soc_driver = {
1850 .name = "soc-audio",
1851 .pm = &snd_soc_pm_ops,
1854 .remove = soc_remove,
1858 * snd_soc_cnew - create new control
1859 * @_template: control template
1860 * @data: control private data
1861 * @long_name: control long name
1862 * @prefix: control name prefix
1864 * Create a new mixer control from a template control.
1866 * Returns 0 for success, else error.
1868 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1869 void *data, const char *long_name,
1872 struct snd_kcontrol_new template;
1873 struct snd_kcontrol *kcontrol;
1876 memcpy(&template, _template, sizeof(template));
1880 long_name = template.name;
1883 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
1887 template.name = name;
1889 template.name = long_name;
1892 kcontrol = snd_ctl_new1(&template, data);
1898 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1900 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
1901 const struct snd_kcontrol_new *controls, int num_controls,
1902 const char *prefix, void *data)
1906 for (i = 0; i < num_controls; i++) {
1907 const struct snd_kcontrol_new *control = &controls[i];
1908 err = snd_ctl_add(card, snd_soc_cnew(control, data,
1909 control->name, prefix));
1911 dev_err(dev, "ASoC: Failed to add %s: %d\n",
1912 control->name, err);
1920 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
1923 struct snd_card *card = soc_card->snd_card;
1924 struct snd_kcontrol *kctl;
1926 if (unlikely(!name))
1929 list_for_each_entry(kctl, &card->controls, list)
1930 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
1934 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
1937 * snd_soc_add_component_controls - Add an array of controls to a component.
1939 * @component: Component to add controls to
1940 * @controls: Array of controls to add
1941 * @num_controls: Number of elements in the array
1943 * Return: 0 for success, else error.
1945 int snd_soc_add_component_controls(struct snd_soc_component *component,
1946 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1948 struct snd_card *card = component->card->snd_card;
1950 return snd_soc_add_controls(card, component->dev, controls,
1951 num_controls, component->name_prefix, component);
1953 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
1956 * snd_soc_add_codec_controls - add an array of controls to a codec.
1957 * Convenience function to add a list of controls. Many codecs were
1958 * duplicating this code.
1960 * @codec: codec to add controls to
1961 * @controls: array of controls to add
1962 * @num_controls: number of elements in the array
1964 * Return 0 for success, else error.
1966 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
1967 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1969 return snd_soc_add_component_controls(&codec->component, controls,
1972 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
1975 * snd_soc_add_platform_controls - add an array of controls to a platform.
1976 * Convenience function to add a list of controls.
1978 * @platform: platform to add controls to
1979 * @controls: array of controls to add
1980 * @num_controls: number of elements in the array
1982 * Return 0 for success, else error.
1984 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
1985 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1987 return snd_soc_add_component_controls(&platform->component, controls,
1990 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
1993 * snd_soc_add_card_controls - add an array of controls to a SoC card.
1994 * Convenience function to add a list of controls.
1996 * @soc_card: SoC card to add controls to
1997 * @controls: array of controls to add
1998 * @num_controls: number of elements in the array
2000 * Return 0 for success, else error.
2002 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2003 const struct snd_kcontrol_new *controls, int num_controls)
2005 struct snd_card *card = soc_card->snd_card;
2007 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2010 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2013 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2014 * Convienience function to add a list of controls.
2016 * @dai: DAI to add controls to
2017 * @controls: array of controls to add
2018 * @num_controls: number of elements in the array
2020 * Return 0 for success, else error.
2022 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2023 const struct snd_kcontrol_new *controls, int num_controls)
2025 struct snd_card *card = dai->component->card->snd_card;
2027 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2030 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2033 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2035 * @clk_id: DAI specific clock ID
2036 * @freq: new clock frequency in Hz
2037 * @dir: new clock direction - input/output.
2039 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2041 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2042 unsigned int freq, int dir)
2044 if (dai->driver && dai->driver->ops->set_sysclk)
2045 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2046 else if (dai->codec && dai->codec->driver->set_sysclk)
2047 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
2052 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2055 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2057 * @clk_id: DAI specific clock ID
2058 * @source: Source for the clock
2059 * @freq: new clock frequency in Hz
2060 * @dir: new clock direction - input/output.
2062 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2064 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2065 int source, unsigned int freq, int dir)
2067 if (codec->driver->set_sysclk)
2068 return codec->driver->set_sysclk(codec, clk_id, source,
2073 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2076 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2078 * @div_id: DAI specific clock divider ID
2079 * @div: new clock divisor.
2081 * Configures the clock dividers. This is used to derive the best DAI bit and
2082 * frame clocks from the system or master clock. It's best to set the DAI bit
2083 * and frame clocks as low as possible to save system power.
2085 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2086 int div_id, int div)
2088 if (dai->driver && dai->driver->ops->set_clkdiv)
2089 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2093 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2096 * snd_soc_dai_set_pll - configure DAI PLL.
2098 * @pll_id: DAI specific PLL ID
2099 * @source: DAI specific source for the PLL
2100 * @freq_in: PLL input clock frequency in Hz
2101 * @freq_out: requested PLL output clock frequency in Hz
2103 * Configures and enables PLL to generate output clock based on input clock.
2105 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2106 unsigned int freq_in, unsigned int freq_out)
2108 if (dai->driver && dai->driver->ops->set_pll)
2109 return dai->driver->ops->set_pll(dai, pll_id, source,
2111 else if (dai->codec && dai->codec->driver->set_pll)
2112 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2117 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2120 * snd_soc_codec_set_pll - configure codec PLL.
2122 * @pll_id: DAI specific PLL ID
2123 * @source: DAI specific source for the PLL
2124 * @freq_in: PLL input clock frequency in Hz
2125 * @freq_out: requested PLL output clock frequency in Hz
2127 * Configures and enables PLL to generate output clock based on input clock.
2129 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2130 unsigned int freq_in, unsigned int freq_out)
2132 if (codec->driver->set_pll)
2133 return codec->driver->set_pll(codec, pll_id, source,
2138 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2141 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2143 * @ratio: Ratio of BCLK to Sample rate.
2145 * Configures the DAI for a preset BCLK to sample rate ratio.
2147 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2149 if (dai->driver && dai->driver->ops->set_bclk_ratio)
2150 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2154 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2157 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2159 * @fmt: SND_SOC_DAIFMT_ format value.
2161 * Configures the DAI hardware format and clocking.
2163 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2165 if (dai->driver == NULL)
2167 if (dai->driver->ops->set_fmt == NULL)
2169 return dai->driver->ops->set_fmt(dai, fmt);
2171 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2174 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2175 * @slots: Number of slots in use.
2176 * @tx_mask: bitmask representing active TX slots.
2177 * @rx_mask: bitmask representing active RX slots.
2179 * Generates the TDM tx and rx slot default masks for DAI.
2181 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2182 unsigned int *tx_mask,
2183 unsigned int *rx_mask)
2185 if (*tx_mask || *rx_mask)
2191 *tx_mask = (1 << slots) - 1;
2192 *rx_mask = (1 << slots) - 1;
2198 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2199 * @dai: The DAI to configure
2200 * @tx_mask: bitmask representing active TX slots.
2201 * @rx_mask: bitmask representing active RX slots.
2202 * @slots: Number of slots in use.
2203 * @slot_width: Width in bits for each slot.
2205 * This function configures the specified DAI for TDM operation. @slot contains
2206 * the total number of slots of the TDM stream and @slot_with the width of each
2207 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2208 * active slots of the TDM stream for the specified DAI, i.e. which slots the
2209 * DAI should write to or read from. If a bit is set the corresponding slot is
2210 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2211 * the first slot, bit 1 to the second slot and so on. The first active slot
2212 * maps to the first channel of the DAI, the second active slot to the second
2213 * channel and so on.
2215 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2216 * @rx_mask and @slot_width will be ignored.
2218 * Returns 0 on success, a negative error code otherwise.
2220 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2221 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2223 if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2224 dai->driver->ops->xlate_tdm_slot_mask(slots,
2225 &tx_mask, &rx_mask);
2227 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2229 dai->tx_mask = tx_mask;
2230 dai->rx_mask = rx_mask;
2232 if (dai->driver && dai->driver->ops->set_tdm_slot)
2233 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2238 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2241 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2243 * @tx_num: how many TX channels
2244 * @tx_slot: pointer to an array which imply the TX slot number channel
2246 * @rx_num: how many RX channels
2247 * @rx_slot: pointer to an array which imply the RX slot number channel
2250 * configure the relationship between channel number and TDM slot number.
2252 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2253 unsigned int tx_num, unsigned int *tx_slot,
2254 unsigned int rx_num, unsigned int *rx_slot)
2256 if (dai->driver && dai->driver->ops->set_channel_map)
2257 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2262 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2265 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2267 * @tristate: tristate enable
2269 * Tristates the DAI so that others can use it.
2271 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2273 if (dai->driver && dai->driver->ops->set_tristate)
2274 return dai->driver->ops->set_tristate(dai, tristate);
2278 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2281 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2283 * @mute: mute enable
2284 * @direction: stream to mute
2286 * Mutes the DAI DAC.
2288 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2294 if (dai->driver->ops->mute_stream)
2295 return dai->driver->ops->mute_stream(dai, mute, direction);
2296 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2297 dai->driver->ops->digital_mute)
2298 return dai->driver->ops->digital_mute(dai, mute);
2302 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2304 static int snd_soc_init_multicodec(struct snd_soc_card *card,
2305 struct snd_soc_dai_link *dai_link)
2307 /* Legacy codec/codec_dai link is a single entry in multicodec */
2308 if (dai_link->codec_name || dai_link->codec_of_node ||
2309 dai_link->codec_dai_name) {
2310 dai_link->num_codecs = 1;
2312 dai_link->codecs = devm_kzalloc(card->dev,
2313 sizeof(struct snd_soc_dai_link_component),
2315 if (!dai_link->codecs)
2318 dai_link->codecs[0].name = dai_link->codec_name;
2319 dai_link->codecs[0].of_node = dai_link->codec_of_node;
2320 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
2323 if (!dai_link->codecs) {
2324 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
2332 * snd_soc_register_card - Register a card with the ASoC core
2334 * @card: Card to register
2337 int snd_soc_register_card(struct snd_soc_card *card)
2341 if (!card->name || !card->dev)
2344 for (i = 0; i < card->num_links; i++) {
2345 struct snd_soc_dai_link *link = &card->dai_link[i];
2347 ret = snd_soc_init_multicodec(card, link);
2349 dev_err(card->dev, "ASoC: failed to init multicodec\n");
2353 for (j = 0; j < link->num_codecs; j++) {
2355 * Codec must be specified by 1 of name or OF node,
2356 * not both or neither.
2358 if (!!link->codecs[j].name ==
2359 !!link->codecs[j].of_node) {
2360 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
2364 /* Codec DAI name must be specified */
2365 if (!link->codecs[j].dai_name) {
2366 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
2373 * Platform may be specified by either name or OF node, but
2374 * can be left unspecified, and a dummy platform will be used.
2376 if (link->platform_name && link->platform_of_node) {
2378 "ASoC: Both platform name/of_node are set for %s\n",
2384 * CPU device may be specified by either name or OF node, but
2385 * can be left unspecified, and will be matched based on DAI
2388 if (link->cpu_name && link->cpu_of_node) {
2390 "ASoC: Neither/both cpu name/of_node are set for %s\n",
2395 * At least one of CPU DAI name or CPU device name/node must be
2398 if (!link->cpu_dai_name &&
2399 !(link->cpu_name || link->cpu_of_node)) {
2401 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
2407 dev_set_drvdata(card->dev, card);
2409 snd_soc_initialize_card_lists(card);
2411 card->rtd = devm_kzalloc(card->dev,
2412 sizeof(struct snd_soc_pcm_runtime) *
2413 (card->num_links + card->num_aux_devs),
2415 if (card->rtd == NULL)
2418 card->rtd_aux = &card->rtd[card->num_links];
2420 for (i = 0; i < card->num_links; i++) {
2421 card->rtd[i].card = card;
2422 card->rtd[i].dai_link = &card->dai_link[i];
2423 card->rtd[i].codec_dais = devm_kzalloc(card->dev,
2424 sizeof(struct snd_soc_dai *) *
2425 (card->rtd[i].dai_link->num_codecs),
2427 if (card->rtd[i].codec_dais == NULL)
2431 for (i = 0; i < card->num_aux_devs; i++)
2432 card->rtd_aux[i].card = card;
2434 INIT_LIST_HEAD(&card->dapm_dirty);
2435 INIT_LIST_HEAD(&card->dobj_list);
2436 card->instantiated = 0;
2437 mutex_init(&card->mutex);
2438 mutex_init(&card->dapm_mutex);
2440 ret = snd_soc_instantiate_card(card);
2444 /* deactivate pins to sleep state */
2445 for (i = 0; i < card->num_rtd; i++) {
2446 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2447 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2450 for (j = 0; j < rtd->num_codecs; j++) {
2451 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2452 if (!codec_dai->active)
2453 pinctrl_pm_select_sleep_state(codec_dai->dev);
2456 if (!cpu_dai->active)
2457 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2462 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2465 * snd_soc_unregister_card - Unregister a card with the ASoC core
2467 * @card: Card to unregister
2470 int snd_soc_unregister_card(struct snd_soc_card *card)
2472 if (card->instantiated) {
2473 card->instantiated = false;
2474 snd_soc_dapm_shutdown(card);
2475 soc_cleanup_card_resources(card);
2476 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2481 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2484 * Simplify DAI link configuration by removing ".-1" from device names
2485 * and sanitizing names.
2487 static char *fmt_single_name(struct device *dev, int *id)
2489 char *found, name[NAME_SIZE];
2492 if (dev_name(dev) == NULL)
2495 strlcpy(name, dev_name(dev), NAME_SIZE);
2497 /* are we a "%s.%d" name (platform and SPI components) */
2498 found = strstr(name, dev->driver->name);
2501 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2503 /* discard ID from name if ID == -1 */
2505 found[strlen(dev->driver->name)] = '\0';
2509 /* I2C component devices are named "bus-addr" */
2510 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2511 char tmp[NAME_SIZE];
2513 /* create unique ID number from I2C addr and bus */
2514 *id = ((id1 & 0xffff) << 16) + id2;
2516 /* sanitize component name for DAI link creation */
2517 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2518 strlcpy(name, tmp, NAME_SIZE);
2523 return kstrdup(name, GFP_KERNEL);
2527 * Simplify DAI link naming for single devices with multiple DAIs by removing
2528 * any ".-1" and using the DAI name (instead of device name).
2530 static inline char *fmt_multiple_name(struct device *dev,
2531 struct snd_soc_dai_driver *dai_drv)
2533 if (dai_drv->name == NULL) {
2535 "ASoC: error - multiple DAI %s registered with no name\n",
2540 return kstrdup(dai_drv->name, GFP_KERNEL);
2544 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2546 * @component: The component for which the DAIs should be unregistered
2548 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2550 struct snd_soc_dai *dai, *_dai;
2552 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2553 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2555 list_del(&dai->list);
2562 * snd_soc_register_dais - Register a DAI with the ASoC core
2564 * @component: The component the DAIs are registered for
2565 * @dai_drv: DAI driver to use for the DAIs
2566 * @count: Number of DAIs
2567 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
2570 static int snd_soc_register_dais(struct snd_soc_component *component,
2571 struct snd_soc_dai_driver *dai_drv, size_t count,
2572 bool legacy_dai_naming)
2574 struct device *dev = component->dev;
2575 struct snd_soc_dai *dai;
2579 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
2581 component->dai_drv = dai_drv;
2582 component->num_dai = count;
2584 for (i = 0; i < count; i++) {
2586 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2593 * Back in the old days when we still had component-less DAIs,
2594 * instead of having a static name, component-less DAIs would
2595 * inherit the name of the parent device so it is possible to
2596 * register multiple instances of the DAI. We still need to keep
2597 * the same naming style even though those DAIs are not
2598 * component-less anymore.
2600 if (count == 1 && legacy_dai_naming &&
2601 (dai_drv[i].id == 0 || dai_drv[i].name == NULL)) {
2602 dai->name = fmt_single_name(dev, &dai->id);
2604 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
2606 dai->id = dai_drv[i].id;
2610 if (dai->name == NULL) {
2616 dai->component = component;
2618 dai->driver = &dai_drv[i];
2619 if (!dai->driver->ops)
2620 dai->driver->ops = &null_dai_ops;
2622 list_add(&dai->list, &component->dai_list);
2624 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2630 snd_soc_unregister_dais(component);
2635 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2636 enum snd_soc_dapm_type type, int subseq)
2638 struct snd_soc_component *component = dapm->component;
2640 component->driver->seq_notifier(component, type, subseq);
2643 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
2646 struct snd_soc_component *component = dapm->component;
2648 return component->driver->stream_event(component, event);
2651 static int snd_soc_component_initialize(struct snd_soc_component *component,
2652 const struct snd_soc_component_driver *driver, struct device *dev)
2654 struct snd_soc_dapm_context *dapm;
2656 component->name = fmt_single_name(dev, &component->id);
2657 if (!component->name) {
2658 dev_err(dev, "ASoC: Failed to allocate name\n");
2662 component->dev = dev;
2663 component->driver = driver;
2664 component->probe = component->driver->probe;
2665 component->remove = component->driver->remove;
2667 dapm = &component->dapm;
2669 dapm->component = component;
2670 dapm->bias_level = SND_SOC_BIAS_OFF;
2671 dapm->idle_bias_off = true;
2672 if (driver->seq_notifier)
2673 dapm->seq_notifier = snd_soc_component_seq_notifier;
2674 if (driver->stream_event)
2675 dapm->stream_event = snd_soc_component_stream_event;
2677 component->controls = driver->controls;
2678 component->num_controls = driver->num_controls;
2679 component->dapm_widgets = driver->dapm_widgets;
2680 component->num_dapm_widgets = driver->num_dapm_widgets;
2681 component->dapm_routes = driver->dapm_routes;
2682 component->num_dapm_routes = driver->num_dapm_routes;
2684 INIT_LIST_HEAD(&component->dai_list);
2685 mutex_init(&component->io_mutex);
2690 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2692 int val_bytes = regmap_get_val_bytes(component->regmap);
2694 /* Errors are legitimate for non-integer byte multiples */
2696 component->val_bytes = val_bytes;
2699 #ifdef CONFIG_REGMAP
2702 * snd_soc_component_init_regmap() - Initialize regmap instance for the component
2703 * @component: The component for which to initialize the regmap instance
2704 * @regmap: The regmap instance that should be used by the component
2706 * This function allows deferred assignment of the regmap instance that is
2707 * associated with the component. Only use this if the regmap instance is not
2708 * yet ready when the component is registered. The function must also be called
2709 * before the first IO attempt of the component.
2711 void snd_soc_component_init_regmap(struct snd_soc_component *component,
2712 struct regmap *regmap)
2714 component->regmap = regmap;
2715 snd_soc_component_setup_regmap(component);
2717 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2720 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
2721 * @component: The component for which to de-initialize the regmap instance
2723 * Calls regmap_exit() on the regmap instance associated to the component and
2724 * removes the regmap instance from the component.
2726 * This function should only be used if snd_soc_component_init_regmap() was used
2727 * to initialize the regmap instance.
2729 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2731 regmap_exit(component->regmap);
2732 component->regmap = NULL;
2734 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2738 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
2740 if (!component->write && !component->read) {
2741 if (!component->regmap)
2742 component->regmap = dev_get_regmap(component->dev, NULL);
2743 if (component->regmap)
2744 snd_soc_component_setup_regmap(component);
2747 list_add(&component->list, &component_list);
2748 INIT_LIST_HEAD(&component->dobj_list);
2751 static void snd_soc_component_add(struct snd_soc_component *component)
2753 mutex_lock(&client_mutex);
2754 snd_soc_component_add_unlocked(component);
2755 mutex_unlock(&client_mutex);
2758 static void snd_soc_component_cleanup(struct snd_soc_component *component)
2760 snd_soc_unregister_dais(component);
2761 kfree(component->name);
2764 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
2766 list_del(&component->list);
2769 int snd_soc_register_component(struct device *dev,
2770 const struct snd_soc_component_driver *cmpnt_drv,
2771 struct snd_soc_dai_driver *dai_drv,
2774 struct snd_soc_component *cmpnt;
2777 cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
2779 dev_err(dev, "ASoC: Failed to allocate memory\n");
2783 ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
2787 cmpnt->ignore_pmdown_time = true;
2788 cmpnt->registered_as_component = true;
2790 ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
2792 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
2796 snd_soc_component_add(cmpnt);
2801 snd_soc_component_cleanup(cmpnt);
2806 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2809 * snd_soc_unregister_component - Unregister a component from the ASoC core
2811 * @dev: The device to unregister
2813 void snd_soc_unregister_component(struct device *dev)
2815 struct snd_soc_component *cmpnt;
2817 mutex_lock(&client_mutex);
2818 list_for_each_entry(cmpnt, &component_list, list) {
2819 if (dev == cmpnt->dev && cmpnt->registered_as_component)
2822 mutex_unlock(&client_mutex);
2826 snd_soc_tplg_component_remove(cmpnt, SND_SOC_TPLG_INDEX_ALL);
2827 snd_soc_component_del_unlocked(cmpnt);
2828 mutex_unlock(&client_mutex);
2829 snd_soc_component_cleanup(cmpnt);
2832 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2834 static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
2836 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2838 return platform->driver->probe(platform);
2841 static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
2843 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2845 platform->driver->remove(platform);
2849 * snd_soc_add_platform - Add a platform to the ASoC core
2850 * @dev: The parent device for the platform
2851 * @platform: The platform to add
2852 * @platform_drv: The driver for the platform
2854 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
2855 const struct snd_soc_platform_driver *platform_drv)
2859 ret = snd_soc_component_initialize(&platform->component,
2860 &platform_drv->component_driver, dev);
2864 platform->dev = dev;
2865 platform->driver = platform_drv;
2867 if (platform_drv->probe)
2868 platform->component.probe = snd_soc_platform_drv_probe;
2869 if (platform_drv->remove)
2870 platform->component.remove = snd_soc_platform_drv_remove;
2872 #ifdef CONFIG_DEBUG_FS
2873 platform->component.debugfs_prefix = "platform";
2876 mutex_lock(&client_mutex);
2877 snd_soc_component_add_unlocked(&platform->component);
2878 list_add(&platform->list, &platform_list);
2879 mutex_unlock(&client_mutex);
2881 dev_dbg(dev, "ASoC: Registered platform '%s'\n",
2882 platform->component.name);
2886 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
2889 * snd_soc_register_platform - Register a platform with the ASoC core
2891 * @dev: The device for the platform
2892 * @platform_drv: The driver for the platform
2894 int snd_soc_register_platform(struct device *dev,
2895 const struct snd_soc_platform_driver *platform_drv)
2897 struct snd_soc_platform *platform;
2900 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
2902 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
2903 if (platform == NULL)
2906 ret = snd_soc_add_platform(dev, platform, platform_drv);
2912 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2915 * snd_soc_remove_platform - Remove a platform from the ASoC core
2916 * @platform: the platform to remove
2918 void snd_soc_remove_platform(struct snd_soc_platform *platform)
2921 mutex_lock(&client_mutex);
2922 list_del(&platform->list);
2923 snd_soc_component_del_unlocked(&platform->component);
2924 mutex_unlock(&client_mutex);
2926 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
2927 platform->component.name);
2929 snd_soc_component_cleanup(&platform->component);
2931 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
2933 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
2935 struct snd_soc_platform *platform;
2937 mutex_lock(&client_mutex);
2938 list_for_each_entry(platform, &platform_list, list) {
2939 if (dev == platform->dev) {
2940 mutex_unlock(&client_mutex);
2944 mutex_unlock(&client_mutex);
2948 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
2951 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2953 * @dev: platform to unregister
2955 void snd_soc_unregister_platform(struct device *dev)
2957 struct snd_soc_platform *platform;
2959 platform = snd_soc_lookup_platform(dev);
2963 snd_soc_remove_platform(platform);
2966 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2968 static u64 codec_format_map[] = {
2969 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2970 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2971 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2972 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2973 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2974 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2975 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2976 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2977 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2978 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2979 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2980 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2981 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2982 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2983 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2984 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2987 /* Fix up the DAI formats for endianness: codecs don't actually see
2988 * the endianness of the data but we're using the CPU format
2989 * definitions which do need to include endianness so we ensure that
2990 * codec DAIs always have both big and little endian variants set.
2992 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2996 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2997 if (stream->formats & codec_format_map[i])
2998 stream->formats |= codec_format_map[i];
3001 static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
3003 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3005 return codec->driver->probe(codec);
3008 static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
3010 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3012 codec->driver->remove(codec);
3015 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
3016 unsigned int reg, unsigned int val)
3018 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3020 return codec->driver->write(codec, reg, val);
3023 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
3024 unsigned int reg, unsigned int *val)
3026 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3028 *val = codec->driver->read(codec, reg);
3033 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
3034 enum snd_soc_bias_level level)
3036 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
3038 return codec->driver->set_bias_level(codec, level);
3042 * snd_soc_register_codec - Register a codec with the ASoC core
3044 * @dev: The parent device for this codec
3045 * @codec_drv: Codec driver
3046 * @dai_drv: The associated DAI driver
3047 * @num_dai: Number of DAIs
3049 int snd_soc_register_codec(struct device *dev,
3050 const struct snd_soc_codec_driver *codec_drv,
3051 struct snd_soc_dai_driver *dai_drv,
3054 struct snd_soc_dapm_context *dapm;
3055 struct snd_soc_codec *codec;
3056 struct snd_soc_dai *dai;
3059 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3061 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3065 codec->component.codec = codec;
3067 ret = snd_soc_component_initialize(&codec->component,
3068 &codec_drv->component_driver, dev);
3072 if (codec_drv->controls) {
3073 codec->component.controls = codec_drv->controls;
3074 codec->component.num_controls = codec_drv->num_controls;
3076 if (codec_drv->dapm_widgets) {
3077 codec->component.dapm_widgets = codec_drv->dapm_widgets;
3078 codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
3080 if (codec_drv->dapm_routes) {
3081 codec->component.dapm_routes = codec_drv->dapm_routes;
3082 codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
3085 if (codec_drv->probe)
3086 codec->component.probe = snd_soc_codec_drv_probe;
3087 if (codec_drv->remove)
3088 codec->component.remove = snd_soc_codec_drv_remove;
3089 if (codec_drv->write)
3090 codec->component.write = snd_soc_codec_drv_write;
3091 if (codec_drv->read)
3092 codec->component.read = snd_soc_codec_drv_read;
3093 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3095 dapm = snd_soc_codec_get_dapm(codec);
3096 dapm->idle_bias_off = codec_drv->idle_bias_off;
3097 dapm->suspend_bias_off = codec_drv->suspend_bias_off;
3098 if (codec_drv->seq_notifier)
3099 dapm->seq_notifier = codec_drv->seq_notifier;
3100 if (codec_drv->set_bias_level)
3101 dapm->set_bias_level = snd_soc_codec_set_bias_level;
3103 codec->driver = codec_drv;
3104 codec->component.val_bytes = codec_drv->reg_word_size;
3106 #ifdef CONFIG_DEBUG_FS
3107 codec->component.init_debugfs = soc_init_codec_debugfs;
3108 codec->component.debugfs_prefix = "codec";
3111 if (codec_drv->get_regmap)
3112 codec->component.regmap = codec_drv->get_regmap(dev);
3114 for (i = 0; i < num_dai; i++) {
3115 fixup_codec_formats(&dai_drv[i].playback);
3116 fixup_codec_formats(&dai_drv[i].capture);
3119 ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3121 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3125 list_for_each_entry(dai, &codec->component.dai_list, list)
3128 mutex_lock(&client_mutex);
3129 snd_soc_component_add_unlocked(&codec->component);
3130 list_add(&codec->list, &codec_list);
3131 mutex_unlock(&client_mutex);
3133 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3134 codec->component.name);
3138 snd_soc_component_cleanup(&codec->component);
3143 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3146 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3148 * @dev: codec to unregister
3150 void snd_soc_unregister_codec(struct device *dev)
3152 struct snd_soc_codec *codec;
3154 mutex_lock(&client_mutex);
3155 list_for_each_entry(codec, &codec_list, list) {
3156 if (dev == codec->dev)
3159 mutex_unlock(&client_mutex);
3163 list_del(&codec->list);
3164 snd_soc_component_del_unlocked(&codec->component);
3165 mutex_unlock(&client_mutex);
3167 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3168 codec->component.name);
3170 snd_soc_component_cleanup(&codec->component);
3171 snd_soc_cache_exit(codec);
3174 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3176 /* Retrieve a card's name from device tree */
3177 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3178 const char *propname)
3180 struct device_node *np;
3184 pr_err("card->dev is not set before calling %s\n", __func__);
3188 np = card->dev->of_node;
3190 ret = of_property_read_string_index(np, propname, 0, &card->name);
3192 * EINVAL means the property does not exist. This is fine providing
3193 * card->name was previously set, which is checked later in
3194 * snd_soc_register_card.
3196 if (ret < 0 && ret != -EINVAL) {
3198 "ASoC: Property '%s' could not be read: %d\n",
3205 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3207 static const struct snd_soc_dapm_widget simple_widgets[] = {
3208 SND_SOC_DAPM_MIC("Microphone", NULL),
3209 SND_SOC_DAPM_LINE("Line", NULL),
3210 SND_SOC_DAPM_HP("Headphone", NULL),
3211 SND_SOC_DAPM_SPK("Speaker", NULL),
3214 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3215 const char *propname)
3217 struct device_node *np = card->dev->of_node;
3218 struct snd_soc_dapm_widget *widgets;
3219 const char *template, *wname;
3220 int i, j, num_widgets, ret;
3222 num_widgets = of_property_count_strings(np, propname);
3223 if (num_widgets < 0) {
3225 "ASoC: Property '%s' does not exist\n", propname);
3228 if (num_widgets & 1) {
3230 "ASoC: Property '%s' length is not even\n", propname);
3236 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3241 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3245 "ASoC: Could not allocate memory for widgets\n");
3249 for (i = 0; i < num_widgets; i++) {
3250 ret = of_property_read_string_index(np, propname,
3254 "ASoC: Property '%s' index %d read error:%d\n",
3255 propname, 2 * i, ret);
3259 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3260 if (!strncmp(template, simple_widgets[j].name,
3261 strlen(simple_widgets[j].name))) {
3262 widgets[i] = simple_widgets[j];
3267 if (j >= ARRAY_SIZE(simple_widgets)) {
3269 "ASoC: DAPM widget '%s' is not supported\n",
3274 ret = of_property_read_string_index(np, propname,
3279 "ASoC: Property '%s' index %d read error:%d\n",
3280 propname, (2 * i) + 1, ret);
3284 widgets[i].name = wname;
3287 card->of_dapm_widgets = widgets;
3288 card->num_of_dapm_widgets = num_widgets;
3292 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3294 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3295 unsigned int *slots,
3296 unsigned int *slot_width)
3301 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3302 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3310 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3311 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3321 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3323 void snd_soc_of_parse_audio_prefix(struct snd_soc_card *card,
3324 struct snd_soc_codec_conf *codec_conf,
3325 struct device_node *of_node,
3326 const char *propname)
3328 struct device_node *np = card->dev->of_node;
3332 ret = of_property_read_string(np, propname, &str);
3334 /* no prefix is not error */
3338 codec_conf->of_node = of_node;
3339 codec_conf->name_prefix = str;
3341 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_prefix);
3343 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3344 const char *propname)
3346 struct device_node *np = card->dev->of_node;
3348 struct snd_soc_dapm_route *routes;
3351 num_routes = of_property_count_strings(np, propname);
3352 if (num_routes < 0 || num_routes & 1) {
3354 "ASoC: Property '%s' does not exist or its length is not even\n",
3360 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3365 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3369 "ASoC: Could not allocate DAPM route table\n");
3373 for (i = 0; i < num_routes; i++) {
3374 ret = of_property_read_string_index(np, propname,
3375 2 * i, &routes[i].sink);
3378 "ASoC: Property '%s' index %d could not be read: %d\n",
3379 propname, 2 * i, ret);
3382 ret = of_property_read_string_index(np, propname,
3383 (2 * i) + 1, &routes[i].source);
3386 "ASoC: Property '%s' index %d could not be read: %d\n",
3387 propname, (2 * i) + 1, ret);
3392 card->num_of_dapm_routes = num_routes;
3393 card->of_dapm_routes = routes;
3397 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3399 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3401 struct device_node **bitclkmaster,
3402 struct device_node **framemaster)
3406 unsigned int format = 0;
3412 } of_fmt_table[] = {
3413 { "i2s", SND_SOC_DAIFMT_I2S },
3414 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3415 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3416 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3417 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3418 { "ac97", SND_SOC_DAIFMT_AC97 },
3419 { "pdm", SND_SOC_DAIFMT_PDM},
3420 { "msb", SND_SOC_DAIFMT_MSB },
3421 { "lsb", SND_SOC_DAIFMT_LSB },
3428 * check "[prefix]format = xxx"
3429 * SND_SOC_DAIFMT_FORMAT_MASK area
3431 snprintf(prop, sizeof(prop), "%sformat", prefix);
3432 ret = of_property_read_string(np, prop, &str);
3434 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3435 if (strcmp(str, of_fmt_table[i].name) == 0) {
3436 format |= of_fmt_table[i].val;
3443 * check "[prefix]continuous-clock"
3444 * SND_SOC_DAIFMT_CLOCK_MASK area
3446 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3447 if (of_get_property(np, prop, NULL))
3448 format |= SND_SOC_DAIFMT_CONT;
3450 format |= SND_SOC_DAIFMT_GATED;
3453 * check "[prefix]bitclock-inversion"
3454 * check "[prefix]frame-inversion"
3455 * SND_SOC_DAIFMT_INV_MASK area
3457 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3458 bit = !!of_get_property(np, prop, NULL);
3460 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3461 frame = !!of_get_property(np, prop, NULL);
3463 switch ((bit << 4) + frame) {
3465 format |= SND_SOC_DAIFMT_IB_IF;
3468 format |= SND_SOC_DAIFMT_IB_NF;
3471 format |= SND_SOC_DAIFMT_NB_IF;
3474 /* SND_SOC_DAIFMT_NB_NF is default */
3479 * check "[prefix]bitclock-master"
3480 * check "[prefix]frame-master"
3481 * SND_SOC_DAIFMT_MASTER_MASK area
3483 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3484 bit = !!of_get_property(np, prop, NULL);
3485 if (bit && bitclkmaster)
3486 *bitclkmaster = of_parse_phandle(np, prop, 0);
3488 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3489 frame = !!of_get_property(np, prop, NULL);
3490 if (frame && framemaster)
3491 *framemaster = of_parse_phandle(np, prop, 0);
3493 switch ((bit << 4) + frame) {
3495 format |= SND_SOC_DAIFMT_CBM_CFM;
3498 format |= SND_SOC_DAIFMT_CBM_CFS;
3501 format |= SND_SOC_DAIFMT_CBS_CFM;
3504 format |= SND_SOC_DAIFMT_CBS_CFS;
3510 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3512 static int snd_soc_get_dai_name(struct of_phandle_args *args,
3513 const char **dai_name)
3515 struct snd_soc_component *pos;
3516 struct device_node *component_of_node;
3517 int ret = -EPROBE_DEFER;
3519 mutex_lock(&client_mutex);
3520 list_for_each_entry(pos, &component_list, list) {
3521 component_of_node = pos->dev->of_node;
3522 if (!component_of_node && pos->dev->parent)
3523 component_of_node = pos->dev->parent->of_node;
3525 if (component_of_node != args->np)
3528 if (pos->driver->of_xlate_dai_name) {
3529 ret = pos->driver->of_xlate_dai_name(pos,
3535 switch (args->args_count) {
3537 id = 0; /* same as dai_drv[0] */
3547 if (id < 0 || id >= pos->num_dai) {
3554 *dai_name = pos->dai_drv[id].name;
3556 *dai_name = pos->name;
3561 mutex_unlock(&client_mutex);
3565 int snd_soc_of_get_dai_name(struct device_node *of_node,
3566 const char **dai_name)
3568 struct of_phandle_args args;
3571 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3572 "#sound-dai-cells", 0, &args);
3576 ret = snd_soc_get_dai_name(&args, dai_name);
3578 of_node_put(args.np);
3582 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3585 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3587 * @of_node: Device node
3588 * @dai_link: DAI link
3590 * Builds an array of CODEC DAI components from the DAI link property
3592 * The array is set in the DAI link and the number of DAIs is set accordingly.
3593 * The device nodes in the array (of_node) must be dereferenced by the caller.
3595 * Returns 0 for success
3597 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3598 struct device_node *of_node,
3599 struct snd_soc_dai_link *dai_link)
3601 struct of_phandle_args args;
3602 struct snd_soc_dai_link_component *component;
3604 int index, num_codecs, ret;
3606 /* Count the number of CODECs */
3608 num_codecs = of_count_phandle_with_args(of_node, name,
3609 "#sound-dai-cells");
3610 if (num_codecs <= 0) {
3611 if (num_codecs == -ENOENT)
3612 dev_err(dev, "No 'sound-dai' property\n");
3614 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3617 component = devm_kzalloc(dev,
3618 sizeof *component * num_codecs,
3622 dai_link->codecs = component;
3623 dai_link->num_codecs = num_codecs;
3625 /* Parse the list */
3626 for (index = 0, component = dai_link->codecs;
3627 index < dai_link->num_codecs;
3628 index++, component++) {
3629 ret = of_parse_phandle_with_args(of_node, name,
3634 component->of_node = args.np;
3635 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3641 for (index = 0, component = dai_link->codecs;
3642 index < dai_link->num_codecs;
3643 index++, component++) {
3644 if (!component->of_node)
3646 of_node_put(component->of_node);
3647 component->of_node = NULL;
3649 dai_link->codecs = NULL;
3650 dai_link->num_codecs = 0;
3653 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3655 static int __init snd_soc_init(void)
3657 snd_soc_debugfs_init();
3658 snd_soc_util_init();
3660 return platform_driver_register(&soc_driver);
3662 module_init(snd_soc_init);
3664 static void __exit snd_soc_exit(void)
3666 snd_soc_util_exit();
3667 snd_soc_debugfs_exit();
3669 #ifdef CONFIG_DEBUG_FS
3671 platform_driver_unregister(&soc_driver);
3673 module_exit(snd_soc_exit);
3675 /* Module information */
3676 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3677 MODULE_DESCRIPTION("ALSA SoC Core");
3678 MODULE_LICENSE("GPL");
3679 MODULE_ALIAS("platform:soc-audio");