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 /* If there are paths active then the CODEC will be held with
658 * bias _ON and should not be suspended. */
659 if (!codec->suspended) {
660 switch (codec->dapm.bias_level) {
661 case SND_SOC_BIAS_STANDBY:
663 * If the CODEC is capable of idle
664 * bias off then being in STANDBY
665 * means it's doing something,
666 * otherwise fall through.
668 if (codec->dapm.idle_bias_off) {
670 "ASoC: idle_bias_off CODEC on over suspend\n");
674 case SND_SOC_BIAS_OFF:
675 if (codec->driver->suspend)
676 codec->driver->suspend(codec);
677 codec->suspended = 1;
678 if (codec->component.regmap)
679 regcache_mark_dirty(codec->component.regmap);
680 /* deactivate pins to sleep state */
681 pinctrl_pm_select_sleep_state(codec->dev);
685 "ASoC: CODEC is on over suspend\n");
691 for (i = 0; i < card->num_rtd; i++) {
692 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
694 if (card->rtd[i].dai_link->ignore_suspend)
697 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
698 cpu_dai->driver->suspend(cpu_dai);
700 /* deactivate pins to sleep state */
701 pinctrl_pm_select_sleep_state(cpu_dai->dev);
704 if (card->suspend_post)
705 card->suspend_post(card);
709 EXPORT_SYMBOL_GPL(snd_soc_suspend);
711 /* deferred resume work, so resume can complete before we finished
712 * setting our codec back up, which can be very slow on I2C
714 static void soc_resume_deferred(struct work_struct *work)
716 struct snd_soc_card *card =
717 container_of(work, struct snd_soc_card, deferred_resume_work);
718 struct snd_soc_codec *codec;
721 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
722 * so userspace apps are blocked from touching us
725 dev_dbg(card->dev, "ASoC: starting resume work\n");
727 /* Bring us up into D2 so that DAPM starts enabling things */
728 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
730 if (card->resume_pre)
731 card->resume_pre(card);
733 /* resume control bus DAIs */
734 for (i = 0; i < card->num_rtd; i++) {
735 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
737 if (card->rtd[i].dai_link->ignore_suspend)
740 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
741 cpu_dai->driver->resume(cpu_dai);
744 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
745 if (codec->suspended) {
746 if (codec->driver->resume)
747 codec->driver->resume(codec);
748 codec->suspended = 0;
752 for (i = 0; i < card->num_rtd; i++) {
754 if (card->rtd[i].dai_link->ignore_suspend)
757 snd_soc_dapm_stream_event(&card->rtd[i],
758 SNDRV_PCM_STREAM_PLAYBACK,
759 SND_SOC_DAPM_STREAM_RESUME);
761 snd_soc_dapm_stream_event(&card->rtd[i],
762 SNDRV_PCM_STREAM_CAPTURE,
763 SND_SOC_DAPM_STREAM_RESUME);
766 /* unmute any active DACs */
767 for (i = 0; i < card->num_rtd; i++) {
769 if (card->rtd[i].dai_link->ignore_suspend)
772 for (j = 0; j < card->rtd[i].num_codecs; j++) {
773 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
774 struct snd_soc_dai_driver *drv = dai->driver;
776 if (drv->ops->digital_mute && dai->playback_active)
777 drv->ops->digital_mute(dai, 0);
781 for (i = 0; i < card->num_rtd; i++) {
782 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
784 if (card->rtd[i].dai_link->ignore_suspend)
787 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
788 cpu_dai->driver->resume(cpu_dai);
791 if (card->resume_post)
792 card->resume_post(card);
794 dev_dbg(card->dev, "ASoC: resume work completed\n");
796 /* userspace can access us now we are back as we were before */
797 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
799 /* Recheck all endpoints too, their state is affected by suspend */
800 dapm_mark_endpoints_dirty(card);
801 snd_soc_dapm_sync(&card->dapm);
804 /* powers up audio subsystem after a suspend */
805 int snd_soc_resume(struct device *dev)
807 struct snd_soc_card *card = dev_get_drvdata(dev);
808 bool bus_control = false;
811 /* If the card is not initialized yet there is nothing to do */
812 if (!card->instantiated)
815 /* activate pins from sleep state */
816 for (i = 0; i < card->num_rtd; i++) {
817 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
818 struct snd_soc_dai **codec_dais = rtd->codec_dais;
819 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
823 pinctrl_pm_select_default_state(cpu_dai->dev);
825 for (j = 0; j < rtd->num_codecs; j++) {
826 struct snd_soc_dai *codec_dai = codec_dais[j];
827 if (codec_dai->active)
828 pinctrl_pm_select_default_state(codec_dai->dev);
833 * DAIs that also act as the control bus master might have other drivers
834 * hanging off them so need to resume immediately. Other drivers don't
835 * have that problem and may take a substantial amount of time to resume
836 * due to I/O costs and anti-pop so handle them out of line.
838 for (i = 0; i < card->num_rtd; i++) {
839 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
840 bus_control |= cpu_dai->driver->bus_control;
843 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
844 soc_resume_deferred(&card->deferred_resume_work);
846 dev_dbg(dev, "ASoC: Scheduling resume work\n");
847 if (!schedule_work(&card->deferred_resume_work))
848 dev_err(dev, "ASoC: resume work item may be lost\n");
853 EXPORT_SYMBOL_GPL(snd_soc_resume);
855 #define snd_soc_suspend NULL
856 #define snd_soc_resume NULL
859 static const struct snd_soc_dai_ops null_dai_ops = {
862 static struct snd_soc_component *soc_find_component(
863 const struct device_node *of_node, const char *name)
865 struct snd_soc_component *component;
867 lockdep_assert_held(&client_mutex);
869 list_for_each_entry(component, &component_list, list) {
871 if (component->dev->of_node == of_node)
873 } else if (strcmp(component->name, name) == 0) {
881 static struct snd_soc_dai *snd_soc_find_dai(
882 const struct snd_soc_dai_link_component *dlc)
884 struct snd_soc_component *component;
885 struct snd_soc_dai *dai;
886 struct device_node *component_of_node;
888 lockdep_assert_held(&client_mutex);
890 /* Find CPU DAI from registered DAIs*/
891 list_for_each_entry(component, &component_list, list) {
892 component_of_node = component->dev->of_node;
893 if (!component_of_node && component->dev->parent)
894 component_of_node = component->dev->parent->of_node;
896 if (dlc->of_node && component_of_node != dlc->of_node)
898 if (dlc->name && strcmp(component->name, dlc->name))
900 list_for_each_entry(dai, &component->dai_list, list) {
901 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
911 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
913 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
914 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
915 struct snd_soc_dai_link_component *codecs = dai_link->codecs;
916 struct snd_soc_dai_link_component cpu_dai_component;
917 struct snd_soc_dai **codec_dais = rtd->codec_dais;
918 struct snd_soc_platform *platform;
919 const char *platform_name;
922 dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
924 cpu_dai_component.name = dai_link->cpu_name;
925 cpu_dai_component.of_node = dai_link->cpu_of_node;
926 cpu_dai_component.dai_name = dai_link->cpu_dai_name;
927 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
929 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
930 dai_link->cpu_dai_name);
931 return -EPROBE_DEFER;
934 rtd->num_codecs = dai_link->num_codecs;
936 /* Find CODEC from registered CODECs */
937 for (i = 0; i < rtd->num_codecs; i++) {
938 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
939 if (!codec_dais[i]) {
940 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
942 return -EPROBE_DEFER;
946 /* Single codec links expect codec and codec_dai in runtime data */
947 rtd->codec_dai = codec_dais[0];
948 rtd->codec = rtd->codec_dai->codec;
950 /* if there's no platform we match on the empty platform */
951 platform_name = dai_link->platform_name;
952 if (!platform_name && !dai_link->platform_of_node)
953 platform_name = "snd-soc-dummy";
955 /* find one from the set of registered platforms */
956 list_for_each_entry(platform, &platform_list, list) {
957 if (dai_link->platform_of_node) {
958 if (platform->dev->of_node !=
959 dai_link->platform_of_node)
962 if (strcmp(platform->component.name, platform_name))
966 rtd->platform = platform;
968 if (!rtd->platform) {
969 dev_err(card->dev, "ASoC: platform %s not registered\n",
970 dai_link->platform_name);
971 return -EPROBE_DEFER;
979 static void soc_remove_component(struct snd_soc_component *component)
981 if (!component->card)
984 /* This is a HACK and will be removed soon */
985 if (component->codec)
986 list_del(&component->codec->card_list);
988 if (component->remove)
989 component->remove(component);
991 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
993 soc_cleanup_component_debugfs(component);
994 component->card = NULL;
995 module_put(component->dev->driver->owner);
998 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1002 if (dai && dai->probed &&
1003 dai->driver->remove_order == order) {
1004 if (dai->driver->remove) {
1005 err = dai->driver->remove(dai);
1008 "ASoC: failed to remove %s: %d\n",
1015 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
1017 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1020 /* unregister the rtd device */
1021 if (rtd->dev_registered) {
1022 device_unregister(rtd->dev);
1023 rtd->dev_registered = 0;
1026 /* remove the CODEC DAI */
1027 for (i = 0; i < rtd->num_codecs; i++)
1028 soc_remove_dai(rtd->codec_dais[i], order);
1030 soc_remove_dai(rtd->cpu_dai, order);
1033 static void soc_remove_link_components(struct snd_soc_card *card, int num,
1036 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1037 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1038 struct snd_soc_platform *platform = rtd->platform;
1039 struct snd_soc_component *component;
1042 /* remove the platform */
1043 if (platform && platform->component.driver->remove_order == order)
1044 soc_remove_component(&platform->component);
1046 /* remove the CODEC-side CODEC */
1047 for (i = 0; i < rtd->num_codecs; i++) {
1048 component = rtd->codec_dais[i]->component;
1049 if (component->driver->remove_order == order)
1050 soc_remove_component(component);
1053 /* remove any CPU-side CODEC */
1055 if (cpu_dai->component->driver->remove_order == order)
1056 soc_remove_component(cpu_dai->component);
1060 static void soc_remove_dai_links(struct snd_soc_card *card)
1064 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1066 for (dai = 0; dai < card->num_rtd; dai++)
1067 soc_remove_link_dais(card, dai, order);
1070 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1072 for (dai = 0; dai < card->num_rtd; dai++)
1073 soc_remove_link_components(card, dai, order);
1079 static void soc_set_name_prefix(struct snd_soc_card *card,
1080 struct snd_soc_component *component)
1084 if (card->codec_conf == NULL)
1087 for (i = 0; i < card->num_configs; i++) {
1088 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1089 if (map->of_node && component->dev->of_node != map->of_node)
1091 if (map->dev_name && strcmp(component->name, map->dev_name))
1093 component->name_prefix = map->name_prefix;
1098 static int soc_probe_component(struct snd_soc_card *card,
1099 struct snd_soc_component *component)
1101 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1102 struct snd_soc_dai *dai;
1105 if (!strcmp(component->name, "snd-soc-dummy"))
1108 if (component->card) {
1109 if (component->card != card) {
1110 dev_err(component->dev,
1111 "Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
1112 card->name, component->card->name);
1118 if (!try_module_get(component->dev->driver->owner))
1121 component->card = card;
1123 soc_set_name_prefix(card, component);
1125 soc_init_component_debugfs(component);
1127 if (component->dapm_widgets) {
1128 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
1129 component->num_dapm_widgets);
1132 dev_err(component->dev,
1133 "Failed to create new controls %d\n", ret);
1138 list_for_each_entry(dai, &component->dai_list, list) {
1139 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1141 dev_err(component->dev,
1142 "Failed to create DAI widgets %d\n", ret);
1147 if (component->probe) {
1148 ret = component->probe(component);
1150 dev_err(component->dev,
1151 "ASoC: failed to probe component %d\n", ret);
1155 WARN(dapm->idle_bias_off &&
1156 dapm->bias_level != SND_SOC_BIAS_OFF,
1157 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1161 if (component->controls)
1162 snd_soc_add_component_controls(component, component->controls,
1163 component->num_controls);
1164 if (component->dapm_routes)
1165 snd_soc_dapm_add_routes(dapm, component->dapm_routes,
1166 component->num_dapm_routes);
1168 list_add(&dapm->list, &card->dapm_list);
1170 /* This is a HACK and will be removed soon */
1171 if (component->codec)
1172 list_add(&component->codec->card_list, &card->codec_dev_list);
1177 soc_cleanup_component_debugfs(component);
1178 component->card = NULL;
1179 module_put(component->dev->driver->owner);
1184 static void rtd_release(struct device *dev)
1189 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1194 /* register the rtd device */
1195 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1198 device_initialize(rtd->dev);
1199 rtd->dev->parent = rtd->card->dev;
1200 rtd->dev->release = rtd_release;
1201 rtd->dev->groups = soc_dev_attr_groups;
1202 dev_set_name(rtd->dev, "%s", name);
1203 dev_set_drvdata(rtd->dev, rtd);
1204 mutex_init(&rtd->pcm_mutex);
1205 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1206 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1207 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1208 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1209 ret = device_add(rtd->dev);
1211 /* calling put_device() here to free the rtd->dev */
1212 put_device(rtd->dev);
1213 dev_err(rtd->card->dev,
1214 "ASoC: failed to register runtime device: %d\n", ret);
1217 rtd->dev_registered = 1;
1221 static int soc_probe_link_components(struct snd_soc_card *card, int num,
1224 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1225 struct snd_soc_platform *platform = rtd->platform;
1226 struct snd_soc_component *component;
1229 /* probe the CPU-side component, if it is a CODEC */
1230 component = rtd->cpu_dai->component;
1231 if (component->driver->probe_order == order) {
1232 ret = soc_probe_component(card, component);
1237 /* probe the CODEC-side components */
1238 for (i = 0; i < rtd->num_codecs; i++) {
1239 component = rtd->codec_dais[i]->component;
1240 if (component->driver->probe_order == order) {
1241 ret = soc_probe_component(card, component);
1247 /* probe the platform */
1248 if (platform->component.driver->probe_order == order) {
1249 ret = soc_probe_component(card, &platform->component);
1257 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1261 if (!dai->probed && dai->driver->probe_order == order) {
1262 if (dai->driver->probe) {
1263 ret = dai->driver->probe(dai);
1266 "ASoC: failed to probe DAI %s: %d\n",
1278 static int soc_link_dai_widgets(struct snd_soc_card *card,
1279 struct snd_soc_dai_link *dai_link,
1280 struct snd_soc_pcm_runtime *rtd)
1282 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1283 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1284 struct snd_soc_dapm_widget *play_w, *capture_w;
1287 if (rtd->num_codecs > 1)
1288 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1290 /* link the DAI widgets */
1291 play_w = codec_dai->playback_widget;
1292 capture_w = cpu_dai->capture_widget;
1293 if (play_w && capture_w) {
1294 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1295 dai_link->num_params, capture_w,
1298 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1299 play_w->name, capture_w->name, ret);
1304 play_w = cpu_dai->playback_widget;
1305 capture_w = codec_dai->capture_widget;
1306 if (play_w && capture_w) {
1307 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1308 dai_link->num_params, capture_w,
1311 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1312 play_w->name, capture_w->name, ret);
1320 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1322 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1323 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1324 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1327 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1328 card->name, num, order);
1330 /* set default power off timeout */
1331 rtd->pmdown_time = pmdown_time;
1333 ret = soc_probe_dai(cpu_dai, order);
1337 /* probe the CODEC DAI */
1338 for (i = 0; i < rtd->num_codecs; i++) {
1339 ret = soc_probe_dai(rtd->codec_dais[i], order);
1344 /* complete DAI probe during last probe */
1345 if (order != SND_SOC_COMP_ORDER_LAST)
1348 /* do machine specific initialization */
1349 if (dai_link->init) {
1350 ret = dai_link->init(rtd);
1352 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1353 dai_link->name, ret);
1358 if (dai_link->dai_fmt)
1359 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1361 ret = soc_post_component_init(rtd, dai_link->name);
1365 #ifdef CONFIG_DEBUG_FS
1366 /* add DPCM sysfs entries */
1367 if (dai_link->dynamic)
1368 soc_dpcm_debugfs_add(rtd);
1371 if (cpu_dai->driver->compress_dai) {
1372 /*create compress_device"*/
1373 ret = soc_new_compress(rtd, num);
1375 dev_err(card->dev, "ASoC: can't create compress %s\n",
1376 dai_link->stream_name);
1381 if (!dai_link->params) {
1382 /* create the pcm */
1383 ret = soc_new_pcm(rtd, num);
1385 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1386 dai_link->stream_name, ret);
1390 INIT_DELAYED_WORK(&rtd->delayed_work,
1391 codec2codec_close_delayed_work);
1393 /* link the DAI widgets */
1394 ret = soc_link_dai_widgets(card, dai_link, rtd);
1403 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1405 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1406 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1407 const char *name = aux_dev->codec_name;
1409 rtd->component = soc_find_component(aux_dev->codec_of_node, name);
1410 if (!rtd->component) {
1411 if (aux_dev->codec_of_node)
1412 name = of_node_full_name(aux_dev->codec_of_node);
1414 dev_err(card->dev, "ASoC: %s not registered\n", name);
1415 return -EPROBE_DEFER;
1419 * Some places still reference rtd->codec, so we have to keep that
1420 * initialized if the component is a CODEC. Once all those references
1421 * have been removed, this code can be removed as well.
1423 rtd->codec = rtd->component->codec;
1428 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1430 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1431 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1434 ret = soc_probe_component(card, rtd->component);
1438 /* do machine specific initialization */
1439 if (aux_dev->init) {
1440 ret = aux_dev->init(rtd->component);
1442 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1443 aux_dev->name, ret);
1448 return soc_post_component_init(rtd, aux_dev->name);
1451 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1453 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1454 struct snd_soc_component *component = rtd->component;
1456 /* unregister the rtd device */
1457 if (rtd->dev_registered) {
1458 device_unregister(rtd->dev);
1459 rtd->dev_registered = 0;
1463 soc_remove_component(component);
1466 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1470 if (codec->cache_init)
1473 ret = snd_soc_cache_init(codec);
1476 "ASoC: Failed to set cache compression type: %d\n",
1480 codec->cache_init = 1;
1485 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1486 * @rtd: The runtime for which the DAI link format should be changed
1487 * @dai_fmt: The new DAI link format
1489 * This function updates the DAI link format for all DAIs connected to the DAI
1490 * link for the specified runtime.
1492 * Note: For setups with a static format set the dai_fmt field in the
1493 * corresponding snd_dai_link struct instead of using this function.
1495 * Returns 0 on success, otherwise a negative error code.
1497 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1498 unsigned int dai_fmt)
1500 struct snd_soc_dai **codec_dais = rtd->codec_dais;
1501 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1505 for (i = 0; i < rtd->num_codecs; i++) {
1506 struct snd_soc_dai *codec_dai = codec_dais[i];
1508 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1509 if (ret != 0 && ret != -ENOTSUPP) {
1510 dev_warn(codec_dai->dev,
1511 "ASoC: Failed to set DAI format: %d\n", ret);
1516 /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1517 if (cpu_dai->codec) {
1518 unsigned int inv_dai_fmt;
1520 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1521 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1522 case SND_SOC_DAIFMT_CBM_CFM:
1523 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1525 case SND_SOC_DAIFMT_CBM_CFS:
1526 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1528 case SND_SOC_DAIFMT_CBS_CFM:
1529 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1531 case SND_SOC_DAIFMT_CBS_CFS:
1532 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1536 dai_fmt = inv_dai_fmt;
1539 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1540 if (ret != 0 && ret != -ENOTSUPP) {
1541 dev_warn(cpu_dai->dev,
1542 "ASoC: Failed to set DAI format: %d\n", ret);
1548 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1550 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1552 struct snd_soc_codec *codec;
1555 mutex_lock(&client_mutex);
1556 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1559 for (i = 0; i < card->num_links; i++) {
1560 ret = soc_bind_dai_link(card, i);
1565 /* bind aux_devs too */
1566 for (i = 0; i < card->num_aux_devs; i++) {
1567 ret = soc_bind_aux_dev(card, i);
1572 /* initialize the register cache for each available codec */
1573 list_for_each_entry(codec, &codec_list, list) {
1574 if (codec->cache_init)
1576 ret = snd_soc_init_codec_cache(codec);
1581 /* card bind complete so register a sound card */
1582 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1583 card->owner, 0, &card->snd_card);
1586 "ASoC: can't create sound card for card %s: %d\n",
1591 soc_init_card_debugfs(card);
1593 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1594 card->dapm.dev = card->dev;
1595 card->dapm.card = card;
1596 list_add(&card->dapm.list, &card->dapm_list);
1598 #ifdef CONFIG_DEBUG_FS
1599 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1602 #ifdef CONFIG_PM_SLEEP
1603 /* deferred resume work */
1604 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1607 if (card->dapm_widgets)
1608 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1609 card->num_dapm_widgets);
1611 if (card->of_dapm_widgets)
1612 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
1613 card->num_of_dapm_widgets);
1615 /* initialise the sound card only once */
1617 ret = card->probe(card);
1619 goto card_probe_error;
1622 /* probe all components used by DAI links on this card */
1623 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1625 for (i = 0; i < card->num_links; i++) {
1626 ret = soc_probe_link_components(card, i, order);
1629 "ASoC: failed to instantiate card %d\n",
1636 /* probe all DAI links on this card */
1637 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1639 for (i = 0; i < card->num_links; i++) {
1640 ret = soc_probe_link_dais(card, i, order);
1643 "ASoC: failed to instantiate card %d\n",
1650 for (i = 0; i < card->num_aux_devs; i++) {
1651 ret = soc_probe_aux_dev(card, i);
1654 "ASoC: failed to add auxiliary devices %d\n",
1656 goto probe_aux_dev_err;
1660 snd_soc_dapm_link_dai_widgets(card);
1661 snd_soc_dapm_connect_dai_link_widgets(card);
1664 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1666 if (card->dapm_routes)
1667 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1668 card->num_dapm_routes);
1670 if (card->of_dapm_routes)
1671 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
1672 card->num_of_dapm_routes);
1674 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1676 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1677 "%s", card->long_name ? card->long_name : card->name);
1678 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1679 "%s", card->driver_name ? card->driver_name : card->name);
1680 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1681 switch (card->snd_card->driver[i]) {
1687 if (!isalnum(card->snd_card->driver[i]))
1688 card->snd_card->driver[i] = '_';
1693 if (card->late_probe) {
1694 ret = card->late_probe(card);
1696 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1698 goto probe_aux_dev_err;
1702 snd_soc_dapm_new_widgets(card);
1704 ret = snd_card_register(card->snd_card);
1706 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1708 goto probe_aux_dev_err;
1711 card->instantiated = 1;
1712 snd_soc_dapm_sync(&card->dapm);
1713 mutex_unlock(&card->mutex);
1714 mutex_unlock(&client_mutex);
1719 for (i = 0; i < card->num_aux_devs; i++)
1720 soc_remove_aux_dev(card, i);
1723 soc_remove_dai_links(card);
1729 snd_soc_dapm_free(&card->dapm);
1730 soc_cleanup_card_debugfs(card);
1731 snd_card_free(card->snd_card);
1734 mutex_unlock(&card->mutex);
1735 mutex_unlock(&client_mutex);
1740 /* probes a new socdev */
1741 static int soc_probe(struct platform_device *pdev)
1743 struct snd_soc_card *card = platform_get_drvdata(pdev);
1746 * no card, so machine driver should be registering card
1747 * we should not be here in that case so ret error
1752 dev_warn(&pdev->dev,
1753 "ASoC: machine %s should use snd_soc_register_card()\n",
1756 /* Bodge while we unpick instantiation */
1757 card->dev = &pdev->dev;
1759 return snd_soc_register_card(card);
1762 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1766 /* make sure any delayed work runs */
1767 for (i = 0; i < card->num_rtd; i++) {
1768 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1769 flush_delayed_work(&rtd->delayed_work);
1772 /* remove auxiliary devices */
1773 for (i = 0; i < card->num_aux_devs; i++)
1774 soc_remove_aux_dev(card, i);
1776 /* remove and free each DAI */
1777 soc_remove_dai_links(card);
1779 soc_cleanup_card_debugfs(card);
1781 /* remove the card */
1785 snd_soc_dapm_free(&card->dapm);
1787 snd_card_free(card->snd_card);
1792 /* removes a socdev */
1793 static int soc_remove(struct platform_device *pdev)
1795 struct snd_soc_card *card = platform_get_drvdata(pdev);
1797 snd_soc_unregister_card(card);
1801 int snd_soc_poweroff(struct device *dev)
1803 struct snd_soc_card *card = dev_get_drvdata(dev);
1806 if (!card->instantiated)
1809 /* Flush out pmdown_time work - we actually do want to run it
1810 * now, we're shutting down so no imminent restart. */
1811 for (i = 0; i < card->num_rtd; i++) {
1812 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1813 flush_delayed_work(&rtd->delayed_work);
1816 snd_soc_dapm_shutdown(card);
1818 /* deactivate pins to sleep state */
1819 for (i = 0; i < card->num_rtd; i++) {
1820 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1821 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1824 pinctrl_pm_select_sleep_state(cpu_dai->dev);
1825 for (j = 0; j < rtd->num_codecs; j++) {
1826 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
1827 pinctrl_pm_select_sleep_state(codec_dai->dev);
1833 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1835 const struct dev_pm_ops snd_soc_pm_ops = {
1836 .suspend = snd_soc_suspend,
1837 .resume = snd_soc_resume,
1838 .freeze = snd_soc_suspend,
1839 .thaw = snd_soc_resume,
1840 .poweroff = snd_soc_poweroff,
1841 .restore = snd_soc_resume,
1843 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1845 /* ASoC platform driver */
1846 static struct platform_driver soc_driver = {
1848 .name = "soc-audio",
1849 .pm = &snd_soc_pm_ops,
1852 .remove = soc_remove,
1856 * snd_soc_cnew - create new control
1857 * @_template: control template
1858 * @data: control private data
1859 * @long_name: control long name
1860 * @prefix: control name prefix
1862 * Create a new mixer control from a template control.
1864 * Returns 0 for success, else error.
1866 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1867 void *data, const char *long_name,
1870 struct snd_kcontrol_new template;
1871 struct snd_kcontrol *kcontrol;
1874 memcpy(&template, _template, sizeof(template));
1878 long_name = template.name;
1881 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
1885 template.name = name;
1887 template.name = long_name;
1890 kcontrol = snd_ctl_new1(&template, data);
1896 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1898 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
1899 const struct snd_kcontrol_new *controls, int num_controls,
1900 const char *prefix, void *data)
1904 for (i = 0; i < num_controls; i++) {
1905 const struct snd_kcontrol_new *control = &controls[i];
1906 err = snd_ctl_add(card, snd_soc_cnew(control, data,
1907 control->name, prefix));
1909 dev_err(dev, "ASoC: Failed to add %s: %d\n",
1910 control->name, err);
1918 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
1921 struct snd_card *card = soc_card->snd_card;
1922 struct snd_kcontrol *kctl;
1924 if (unlikely(!name))
1927 list_for_each_entry(kctl, &card->controls, list)
1928 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
1932 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
1935 * snd_soc_add_component_controls - Add an array of controls to a component.
1937 * @component: Component to add controls to
1938 * @controls: Array of controls to add
1939 * @num_controls: Number of elements in the array
1941 * Return: 0 for success, else error.
1943 int snd_soc_add_component_controls(struct snd_soc_component *component,
1944 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1946 struct snd_card *card = component->card->snd_card;
1948 return snd_soc_add_controls(card, component->dev, controls,
1949 num_controls, component->name_prefix, component);
1951 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
1954 * snd_soc_add_codec_controls - add an array of controls to a codec.
1955 * Convenience function to add a list of controls. Many codecs were
1956 * duplicating this code.
1958 * @codec: codec to add controls to
1959 * @controls: array of controls to add
1960 * @num_controls: number of elements in the array
1962 * Return 0 for success, else error.
1964 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
1965 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1967 return snd_soc_add_component_controls(&codec->component, controls,
1970 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
1973 * snd_soc_add_platform_controls - add an array of controls to a platform.
1974 * Convenience function to add a list of controls.
1976 * @platform: platform to add controls to
1977 * @controls: array of controls to add
1978 * @num_controls: number of elements in the array
1980 * Return 0 for success, else error.
1982 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
1983 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1985 return snd_soc_add_component_controls(&platform->component, controls,
1988 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
1991 * snd_soc_add_card_controls - add an array of controls to a SoC card.
1992 * Convenience function to add a list of controls.
1994 * @soc_card: SoC card to add controls to
1995 * @controls: array of controls to add
1996 * @num_controls: number of elements in the array
1998 * Return 0 for success, else error.
2000 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
2001 const struct snd_kcontrol_new *controls, int num_controls)
2003 struct snd_card *card = soc_card->snd_card;
2005 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
2008 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
2011 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2012 * Convienience function to add a list of controls.
2014 * @dai: DAI to add controls to
2015 * @controls: array of controls to add
2016 * @num_controls: number of elements in the array
2018 * Return 0 for success, else error.
2020 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2021 const struct snd_kcontrol_new *controls, int num_controls)
2023 struct snd_card *card = dai->component->card->snd_card;
2025 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2028 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2031 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2033 * @clk_id: DAI specific clock ID
2034 * @freq: new clock frequency in Hz
2035 * @dir: new clock direction - input/output.
2037 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2039 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2040 unsigned int freq, int dir)
2042 if (dai->driver && dai->driver->ops->set_sysclk)
2043 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2044 else if (dai->codec && dai->codec->driver->set_sysclk)
2045 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
2050 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2053 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2055 * @clk_id: DAI specific clock ID
2056 * @source: Source for the clock
2057 * @freq: new clock frequency in Hz
2058 * @dir: new clock direction - input/output.
2060 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2062 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2063 int source, unsigned int freq, int dir)
2065 if (codec->driver->set_sysclk)
2066 return codec->driver->set_sysclk(codec, clk_id, source,
2071 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2074 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2076 * @div_id: DAI specific clock divider ID
2077 * @div: new clock divisor.
2079 * Configures the clock dividers. This is used to derive the best DAI bit and
2080 * frame clocks from the system or master clock. It's best to set the DAI bit
2081 * and frame clocks as low as possible to save system power.
2083 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2084 int div_id, int div)
2086 if (dai->driver && dai->driver->ops->set_clkdiv)
2087 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2091 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2094 * snd_soc_dai_set_pll - configure DAI PLL.
2096 * @pll_id: DAI specific PLL ID
2097 * @source: DAI specific source for the PLL
2098 * @freq_in: PLL input clock frequency in Hz
2099 * @freq_out: requested PLL output clock frequency in Hz
2101 * Configures and enables PLL to generate output clock based on input clock.
2103 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2104 unsigned int freq_in, unsigned int freq_out)
2106 if (dai->driver && dai->driver->ops->set_pll)
2107 return dai->driver->ops->set_pll(dai, pll_id, source,
2109 else if (dai->codec && dai->codec->driver->set_pll)
2110 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2115 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2118 * snd_soc_codec_set_pll - configure codec PLL.
2120 * @pll_id: DAI specific PLL ID
2121 * @source: DAI specific source for the PLL
2122 * @freq_in: PLL input clock frequency in Hz
2123 * @freq_out: requested PLL output clock frequency in Hz
2125 * Configures and enables PLL to generate output clock based on input clock.
2127 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2128 unsigned int freq_in, unsigned int freq_out)
2130 if (codec->driver->set_pll)
2131 return codec->driver->set_pll(codec, pll_id, source,
2136 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2139 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2141 * @ratio Ratio of BCLK to Sample rate.
2143 * Configures the DAI for a preset BCLK to sample rate ratio.
2145 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2147 if (dai->driver && dai->driver->ops->set_bclk_ratio)
2148 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2152 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2155 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2157 * @fmt: SND_SOC_DAIFMT_ format value.
2159 * Configures the DAI hardware format and clocking.
2161 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2163 if (dai->driver == NULL)
2165 if (dai->driver->ops->set_fmt == NULL)
2167 return dai->driver->ops->set_fmt(dai, fmt);
2169 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2172 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2173 * @slots: Number of slots in use.
2174 * @tx_mask: bitmask representing active TX slots.
2175 * @rx_mask: bitmask representing active RX slots.
2177 * Generates the TDM tx and rx slot default masks for DAI.
2179 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2180 unsigned int *tx_mask,
2181 unsigned int *rx_mask)
2183 if (*tx_mask || *rx_mask)
2189 *tx_mask = (1 << slots) - 1;
2190 *rx_mask = (1 << slots) - 1;
2196 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2197 * @dai: The DAI to configure
2198 * @tx_mask: bitmask representing active TX slots.
2199 * @rx_mask: bitmask representing active RX slots.
2200 * @slots: Number of slots in use.
2201 * @slot_width: Width in bits for each slot.
2203 * This function configures the specified DAI for TDM operation. @slot contains
2204 * the total number of slots of the TDM stream and @slot_with the width of each
2205 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2206 * active slots of the TDM stream for the specified DAI, i.e. which slots the
2207 * DAI should write to or read from. If a bit is set the corresponding slot is
2208 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2209 * the first slot, bit 1 to the second slot and so on. The first active slot
2210 * maps to the first channel of the DAI, the second active slot to the second
2211 * channel and so on.
2213 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2214 * @rx_mask and @slot_width will be ignored.
2216 * Returns 0 on success, a negative error code otherwise.
2218 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2219 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2221 if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2222 dai->driver->ops->xlate_tdm_slot_mask(slots,
2223 &tx_mask, &rx_mask);
2225 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2227 dai->tx_mask = tx_mask;
2228 dai->rx_mask = rx_mask;
2230 if (dai->driver && dai->driver->ops->set_tdm_slot)
2231 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2236 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2239 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2241 * @tx_num: how many TX channels
2242 * @tx_slot: pointer to an array which imply the TX slot number channel
2244 * @rx_num: how many RX channels
2245 * @rx_slot: pointer to an array which imply the RX slot number channel
2248 * configure the relationship between channel number and TDM slot number.
2250 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2251 unsigned int tx_num, unsigned int *tx_slot,
2252 unsigned int rx_num, unsigned int *rx_slot)
2254 if (dai->driver && dai->driver->ops->set_channel_map)
2255 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2260 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2263 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2265 * @tristate: tristate enable
2267 * Tristates the DAI so that others can use it.
2269 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2271 if (dai->driver && dai->driver->ops->set_tristate)
2272 return dai->driver->ops->set_tristate(dai, tristate);
2276 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2279 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2281 * @mute: mute enable
2282 * @direction: stream to mute
2284 * Mutes the DAI DAC.
2286 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2292 if (dai->driver->ops->mute_stream)
2293 return dai->driver->ops->mute_stream(dai, mute, direction);
2294 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2295 dai->driver->ops->digital_mute)
2296 return dai->driver->ops->digital_mute(dai, mute);
2300 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2302 static int snd_soc_init_multicodec(struct snd_soc_card *card,
2303 struct snd_soc_dai_link *dai_link)
2305 /* Legacy codec/codec_dai link is a single entry in multicodec */
2306 if (dai_link->codec_name || dai_link->codec_of_node ||
2307 dai_link->codec_dai_name) {
2308 dai_link->num_codecs = 1;
2310 dai_link->codecs = devm_kzalloc(card->dev,
2311 sizeof(struct snd_soc_dai_link_component),
2313 if (!dai_link->codecs)
2316 dai_link->codecs[0].name = dai_link->codec_name;
2317 dai_link->codecs[0].of_node = dai_link->codec_of_node;
2318 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
2321 if (!dai_link->codecs) {
2322 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
2330 * snd_soc_register_card - Register a card with the ASoC core
2332 * @card: Card to register
2335 int snd_soc_register_card(struct snd_soc_card *card)
2339 if (!card->name || !card->dev)
2342 for (i = 0; i < card->num_links; i++) {
2343 struct snd_soc_dai_link *link = &card->dai_link[i];
2345 ret = snd_soc_init_multicodec(card, link);
2347 dev_err(card->dev, "ASoC: failed to init multicodec\n");
2351 for (j = 0; j < link->num_codecs; j++) {
2353 * Codec must be specified by 1 of name or OF node,
2354 * not both or neither.
2356 if (!!link->codecs[j].name ==
2357 !!link->codecs[j].of_node) {
2358 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
2362 /* Codec DAI name must be specified */
2363 if (!link->codecs[j].dai_name) {
2364 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
2371 * Platform may be specified by either name or OF node, but
2372 * can be left unspecified, and a dummy platform will be used.
2374 if (link->platform_name && link->platform_of_node) {
2376 "ASoC: Both platform name/of_node are set for %s\n",
2382 * CPU device may be specified by either name or OF node, but
2383 * can be left unspecified, and will be matched based on DAI
2386 if (link->cpu_name && link->cpu_of_node) {
2388 "ASoC: Neither/both cpu name/of_node are set for %s\n",
2393 * At least one of CPU DAI name or CPU device name/node must be
2396 if (!link->cpu_dai_name &&
2397 !(link->cpu_name || link->cpu_of_node)) {
2399 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
2405 dev_set_drvdata(card->dev, card);
2407 snd_soc_initialize_card_lists(card);
2409 card->rtd = devm_kzalloc(card->dev,
2410 sizeof(struct snd_soc_pcm_runtime) *
2411 (card->num_links + card->num_aux_devs),
2413 if (card->rtd == NULL)
2416 card->rtd_aux = &card->rtd[card->num_links];
2418 for (i = 0; i < card->num_links; i++) {
2419 card->rtd[i].card = card;
2420 card->rtd[i].dai_link = &card->dai_link[i];
2421 card->rtd[i].codec_dais = devm_kzalloc(card->dev,
2422 sizeof(struct snd_soc_dai *) *
2423 (card->rtd[i].dai_link->num_codecs),
2425 if (card->rtd[i].codec_dais == NULL)
2429 for (i = 0; i < card->num_aux_devs; i++)
2430 card->rtd_aux[i].card = card;
2432 INIT_LIST_HEAD(&card->dapm_dirty);
2433 INIT_LIST_HEAD(&card->dobj_list);
2434 card->instantiated = 0;
2435 mutex_init(&card->mutex);
2436 mutex_init(&card->dapm_mutex);
2438 ret = snd_soc_instantiate_card(card);
2442 /* deactivate pins to sleep state */
2443 for (i = 0; i < card->num_rtd; i++) {
2444 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2445 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2448 for (j = 0; j < rtd->num_codecs; j++) {
2449 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2450 if (!codec_dai->active)
2451 pinctrl_pm_select_sleep_state(codec_dai->dev);
2454 if (!cpu_dai->active)
2455 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2460 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2463 * snd_soc_unregister_card - Unregister a card with the ASoC core
2465 * @card: Card to unregister
2468 int snd_soc_unregister_card(struct snd_soc_card *card)
2470 if (card->instantiated) {
2471 card->instantiated = false;
2472 snd_soc_dapm_shutdown(card);
2473 soc_cleanup_card_resources(card);
2474 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2479 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2482 * Simplify DAI link configuration by removing ".-1" from device names
2483 * and sanitizing names.
2485 static char *fmt_single_name(struct device *dev, int *id)
2487 char *found, name[NAME_SIZE];
2490 if (dev_name(dev) == NULL)
2493 strlcpy(name, dev_name(dev), NAME_SIZE);
2495 /* are we a "%s.%d" name (platform and SPI components) */
2496 found = strstr(name, dev->driver->name);
2499 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2501 /* discard ID from name if ID == -1 */
2503 found[strlen(dev->driver->name)] = '\0';
2507 /* I2C component devices are named "bus-addr" */
2508 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2509 char tmp[NAME_SIZE];
2511 /* create unique ID number from I2C addr and bus */
2512 *id = ((id1 & 0xffff) << 16) + id2;
2514 /* sanitize component name for DAI link creation */
2515 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2516 strlcpy(name, tmp, NAME_SIZE);
2521 return kstrdup(name, GFP_KERNEL);
2525 * Simplify DAI link naming for single devices with multiple DAIs by removing
2526 * any ".-1" and using the DAI name (instead of device name).
2528 static inline char *fmt_multiple_name(struct device *dev,
2529 struct snd_soc_dai_driver *dai_drv)
2531 if (dai_drv->name == NULL) {
2533 "ASoC: error - multiple DAI %s registered with no name\n",
2538 return kstrdup(dai_drv->name, GFP_KERNEL);
2542 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2544 * @component: The component for which the DAIs should be unregistered
2546 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2548 struct snd_soc_dai *dai, *_dai;
2550 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2551 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2553 list_del(&dai->list);
2560 * snd_soc_register_dais - Register a DAI with the ASoC core
2562 * @component: The component the DAIs are registered for
2563 * @dai_drv: DAI driver to use for the DAIs
2564 * @count: Number of DAIs
2565 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
2568 static int snd_soc_register_dais(struct snd_soc_component *component,
2569 struct snd_soc_dai_driver *dai_drv, size_t count,
2570 bool legacy_dai_naming)
2572 struct device *dev = component->dev;
2573 struct snd_soc_dai *dai;
2577 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
2579 component->dai_drv = dai_drv;
2580 component->num_dai = count;
2582 for (i = 0; i < count; i++) {
2584 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2591 * Back in the old days when we still had component-less DAIs,
2592 * instead of having a static name, component-less DAIs would
2593 * inherit the name of the parent device so it is possible to
2594 * register multiple instances of the DAI. We still need to keep
2595 * the same naming style even though those DAIs are not
2596 * component-less anymore.
2598 if (count == 1 && legacy_dai_naming &&
2599 (dai_drv[i].id == 0 || dai_drv[i].name == NULL)) {
2600 dai->name = fmt_single_name(dev, &dai->id);
2602 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
2604 dai->id = dai_drv[i].id;
2608 if (dai->name == NULL) {
2614 dai->component = component;
2616 dai->driver = &dai_drv[i];
2617 if (!dai->driver->ops)
2618 dai->driver->ops = &null_dai_ops;
2620 list_add(&dai->list, &component->dai_list);
2622 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2628 snd_soc_unregister_dais(component);
2633 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2634 enum snd_soc_dapm_type type, int subseq)
2636 struct snd_soc_component *component = dapm->component;
2638 component->driver->seq_notifier(component, type, subseq);
2641 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
2644 struct snd_soc_component *component = dapm->component;
2646 return component->driver->stream_event(component, event);
2649 static int snd_soc_component_initialize(struct snd_soc_component *component,
2650 const struct snd_soc_component_driver *driver, struct device *dev)
2652 struct snd_soc_dapm_context *dapm;
2654 component->name = fmt_single_name(dev, &component->id);
2655 if (!component->name) {
2656 dev_err(dev, "ASoC: Failed to allocate name\n");
2660 component->dev = dev;
2661 component->driver = driver;
2662 component->probe = component->driver->probe;
2663 component->remove = component->driver->remove;
2665 if (!component->dapm_ptr)
2666 component->dapm_ptr = &component->dapm;
2668 dapm = component->dapm_ptr;
2670 dapm->component = component;
2671 dapm->bias_level = SND_SOC_BIAS_OFF;
2672 dapm->idle_bias_off = true;
2673 if (driver->seq_notifier)
2674 dapm->seq_notifier = snd_soc_component_seq_notifier;
2675 if (driver->stream_event)
2676 dapm->stream_event = snd_soc_component_stream_event;
2678 component->controls = driver->controls;
2679 component->num_controls = driver->num_controls;
2680 component->dapm_widgets = driver->dapm_widgets;
2681 component->num_dapm_widgets = driver->num_dapm_widgets;
2682 component->dapm_routes = driver->dapm_routes;
2683 component->num_dapm_routes = driver->num_dapm_routes;
2685 INIT_LIST_HEAD(&component->dai_list);
2686 mutex_init(&component->io_mutex);
2691 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2693 int val_bytes = regmap_get_val_bytes(component->regmap);
2695 /* Errors are legitimate for non-integer byte multiples */
2697 component->val_bytes = val_bytes;
2700 #ifdef CONFIG_REGMAP
2703 * snd_soc_component_init_regmap() - Initialize regmap instance for the component
2704 * @component: The component for which to initialize the regmap instance
2705 * @regmap: The regmap instance that should be used by the component
2707 * This function allows deferred assignment of the regmap instance that is
2708 * associated with the component. Only use this if the regmap instance is not
2709 * yet ready when the component is registered. The function must also be called
2710 * before the first IO attempt of the component.
2712 void snd_soc_component_init_regmap(struct snd_soc_component *component,
2713 struct regmap *regmap)
2715 component->regmap = regmap;
2716 snd_soc_component_setup_regmap(component);
2718 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2721 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
2722 * @component: The component for which to de-initialize the regmap instance
2724 * Calls regmap_exit() on the regmap instance associated to the component and
2725 * removes the regmap instance from the component.
2727 * This function should only be used if snd_soc_component_init_regmap() was used
2728 * to initialize the regmap instance.
2730 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2732 regmap_exit(component->regmap);
2733 component->regmap = NULL;
2735 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2739 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
2741 if (!component->write && !component->read) {
2742 if (!component->regmap)
2743 component->regmap = dev_get_regmap(component->dev, NULL);
2744 if (component->regmap)
2745 snd_soc_component_setup_regmap(component);
2748 list_add(&component->list, &component_list);
2749 INIT_LIST_HEAD(&component->dobj_list);
2752 static void snd_soc_component_add(struct snd_soc_component *component)
2754 mutex_lock(&client_mutex);
2755 snd_soc_component_add_unlocked(component);
2756 mutex_unlock(&client_mutex);
2759 static void snd_soc_component_cleanup(struct snd_soc_component *component)
2761 snd_soc_unregister_dais(component);
2762 kfree(component->name);
2765 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
2767 list_del(&component->list);
2770 int snd_soc_register_component(struct device *dev,
2771 const struct snd_soc_component_driver *cmpnt_drv,
2772 struct snd_soc_dai_driver *dai_drv,
2775 struct snd_soc_component *cmpnt;
2778 cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
2780 dev_err(dev, "ASoC: Failed to allocate memory\n");
2784 ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
2788 cmpnt->ignore_pmdown_time = true;
2789 cmpnt->registered_as_component = true;
2791 ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
2793 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
2797 snd_soc_component_add(cmpnt);
2802 snd_soc_component_cleanup(cmpnt);
2807 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2810 * snd_soc_unregister_component - Unregister a component from the ASoC core
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_driver: 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 * @platform: platform to register
2893 int snd_soc_register_platform(struct device *dev,
2894 const struct snd_soc_platform_driver *platform_drv)
2896 struct snd_soc_platform *platform;
2899 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
2901 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
2902 if (platform == NULL)
2905 ret = snd_soc_add_platform(dev, platform, platform_drv);
2911 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2914 * snd_soc_remove_platform - Remove a platform from the ASoC core
2915 * @platform: the platform to remove
2917 void snd_soc_remove_platform(struct snd_soc_platform *platform)
2920 mutex_lock(&client_mutex);
2921 list_del(&platform->list);
2922 snd_soc_component_del_unlocked(&platform->component);
2923 mutex_unlock(&client_mutex);
2925 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
2926 platform->component.name);
2928 snd_soc_component_cleanup(&platform->component);
2930 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
2932 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
2934 struct snd_soc_platform *platform;
2936 mutex_lock(&client_mutex);
2937 list_for_each_entry(platform, &platform_list, list) {
2938 if (dev == platform->dev) {
2939 mutex_unlock(&client_mutex);
2943 mutex_unlock(&client_mutex);
2947 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
2950 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2952 * @platform: platform to unregister
2954 void snd_soc_unregister_platform(struct device *dev)
2956 struct snd_soc_platform *platform;
2958 platform = snd_soc_lookup_platform(dev);
2962 snd_soc_remove_platform(platform);
2965 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2967 static u64 codec_format_map[] = {
2968 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2969 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2970 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2971 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2972 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2973 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2974 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2975 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2976 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2977 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2978 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2979 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2980 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2981 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2982 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2983 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2986 /* Fix up the DAI formats for endianness: codecs don't actually see
2987 * the endianness of the data but we're using the CPU format
2988 * definitions which do need to include endianness so we ensure that
2989 * codec DAIs always have both big and little endian variants set.
2991 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2995 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2996 if (stream->formats & codec_format_map[i])
2997 stream->formats |= codec_format_map[i];
3000 static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
3002 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3004 return codec->driver->probe(codec);
3007 static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
3009 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3011 codec->driver->remove(codec);
3014 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
3015 unsigned int reg, unsigned int val)
3017 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3019 return codec->driver->write(codec, reg, val);
3022 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
3023 unsigned int reg, unsigned int *val)
3025 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3027 *val = codec->driver->read(codec, reg);
3032 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
3033 enum snd_soc_bias_level level)
3035 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
3037 return codec->driver->set_bias_level(codec, level);
3041 * snd_soc_register_codec - Register a codec with the ASoC core
3043 * @codec: codec to register
3045 int snd_soc_register_codec(struct device *dev,
3046 const struct snd_soc_codec_driver *codec_drv,
3047 struct snd_soc_dai_driver *dai_drv,
3050 struct snd_soc_codec *codec;
3051 struct snd_soc_dai *dai;
3054 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3056 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3060 codec->component.dapm_ptr = &codec->dapm;
3061 codec->component.codec = codec;
3063 ret = snd_soc_component_initialize(&codec->component,
3064 &codec_drv->component_driver, dev);
3068 if (codec_drv->controls) {
3069 codec->component.controls = codec_drv->controls;
3070 codec->component.num_controls = codec_drv->num_controls;
3072 if (codec_drv->dapm_widgets) {
3073 codec->component.dapm_widgets = codec_drv->dapm_widgets;
3074 codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
3076 if (codec_drv->dapm_routes) {
3077 codec->component.dapm_routes = codec_drv->dapm_routes;
3078 codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
3081 if (codec_drv->probe)
3082 codec->component.probe = snd_soc_codec_drv_probe;
3083 if (codec_drv->remove)
3084 codec->component.remove = snd_soc_codec_drv_remove;
3085 if (codec_drv->write)
3086 codec->component.write = snd_soc_codec_drv_write;
3087 if (codec_drv->read)
3088 codec->component.read = snd_soc_codec_drv_read;
3089 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3090 codec->dapm.idle_bias_off = codec_drv->idle_bias_off;
3091 codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off;
3092 if (codec_drv->seq_notifier)
3093 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3094 if (codec_drv->set_bias_level)
3095 codec->dapm.set_bias_level = snd_soc_codec_set_bias_level;
3097 codec->driver = codec_drv;
3098 codec->component.val_bytes = codec_drv->reg_word_size;
3100 #ifdef CONFIG_DEBUG_FS
3101 codec->component.init_debugfs = soc_init_codec_debugfs;
3102 codec->component.debugfs_prefix = "codec";
3105 if (codec_drv->get_regmap)
3106 codec->component.regmap = codec_drv->get_regmap(dev);
3108 for (i = 0; i < num_dai; i++) {
3109 fixup_codec_formats(&dai_drv[i].playback);
3110 fixup_codec_formats(&dai_drv[i].capture);
3113 ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3115 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3119 list_for_each_entry(dai, &codec->component.dai_list, list)
3122 mutex_lock(&client_mutex);
3123 snd_soc_component_add_unlocked(&codec->component);
3124 list_add(&codec->list, &codec_list);
3125 mutex_unlock(&client_mutex);
3127 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3128 codec->component.name);
3132 snd_soc_component_cleanup(&codec->component);
3137 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3140 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3142 * @codec: codec to unregister
3144 void snd_soc_unregister_codec(struct device *dev)
3146 struct snd_soc_codec *codec;
3148 mutex_lock(&client_mutex);
3149 list_for_each_entry(codec, &codec_list, list) {
3150 if (dev == codec->dev)
3153 mutex_unlock(&client_mutex);
3157 list_del(&codec->list);
3158 snd_soc_component_del_unlocked(&codec->component);
3159 mutex_unlock(&client_mutex);
3161 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3162 codec->component.name);
3164 snd_soc_component_cleanup(&codec->component);
3165 snd_soc_cache_exit(codec);
3168 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3170 /* Retrieve a card's name from device tree */
3171 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3172 const char *propname)
3174 struct device_node *np;
3178 pr_err("card->dev is not set before calling %s\n", __func__);
3182 np = card->dev->of_node;
3184 ret = of_property_read_string_index(np, propname, 0, &card->name);
3186 * EINVAL means the property does not exist. This is fine providing
3187 * card->name was previously set, which is checked later in
3188 * snd_soc_register_card.
3190 if (ret < 0 && ret != -EINVAL) {
3192 "ASoC: Property '%s' could not be read: %d\n",
3199 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3201 static const struct snd_soc_dapm_widget simple_widgets[] = {
3202 SND_SOC_DAPM_MIC("Microphone", NULL),
3203 SND_SOC_DAPM_LINE("Line", NULL),
3204 SND_SOC_DAPM_HP("Headphone", NULL),
3205 SND_SOC_DAPM_SPK("Speaker", NULL),
3208 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3209 const char *propname)
3211 struct device_node *np = card->dev->of_node;
3212 struct snd_soc_dapm_widget *widgets;
3213 const char *template, *wname;
3214 int i, j, num_widgets, ret;
3216 num_widgets = of_property_count_strings(np, propname);
3217 if (num_widgets < 0) {
3219 "ASoC: Property '%s' does not exist\n", propname);
3222 if (num_widgets & 1) {
3224 "ASoC: Property '%s' length is not even\n", propname);
3230 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3235 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3239 "ASoC: Could not allocate memory for widgets\n");
3243 for (i = 0; i < num_widgets; i++) {
3244 ret = of_property_read_string_index(np, propname,
3248 "ASoC: Property '%s' index %d read error:%d\n",
3249 propname, 2 * i, ret);
3253 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3254 if (!strncmp(template, simple_widgets[j].name,
3255 strlen(simple_widgets[j].name))) {
3256 widgets[i] = simple_widgets[j];
3261 if (j >= ARRAY_SIZE(simple_widgets)) {
3263 "ASoC: DAPM widget '%s' is not supported\n",
3268 ret = of_property_read_string_index(np, propname,
3273 "ASoC: Property '%s' index %d read error:%d\n",
3274 propname, (2 * i) + 1, ret);
3278 widgets[i].name = wname;
3281 card->of_dapm_widgets = widgets;
3282 card->num_of_dapm_widgets = num_widgets;
3286 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3288 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3289 unsigned int *slots,
3290 unsigned int *slot_width)
3295 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3296 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3304 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3305 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3315 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3317 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3318 const char *propname)
3320 struct device_node *np = card->dev->of_node;
3322 struct snd_soc_dapm_route *routes;
3325 num_routes = of_property_count_strings(np, propname);
3326 if (num_routes < 0 || num_routes & 1) {
3328 "ASoC: Property '%s' does not exist or its length is not even\n",
3334 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3339 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3343 "ASoC: Could not allocate DAPM route table\n");
3347 for (i = 0; i < num_routes; i++) {
3348 ret = of_property_read_string_index(np, propname,
3349 2 * i, &routes[i].sink);
3352 "ASoC: Property '%s' index %d could not be read: %d\n",
3353 propname, 2 * i, ret);
3356 ret = of_property_read_string_index(np, propname,
3357 (2 * i) + 1, &routes[i].source);
3360 "ASoC: Property '%s' index %d could not be read: %d\n",
3361 propname, (2 * i) + 1, ret);
3366 card->num_of_dapm_routes = num_routes;
3367 card->of_dapm_routes = routes;
3371 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3373 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3375 struct device_node **bitclkmaster,
3376 struct device_node **framemaster)
3380 unsigned int format = 0;
3386 } of_fmt_table[] = {
3387 { "i2s", SND_SOC_DAIFMT_I2S },
3388 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3389 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3390 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3391 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3392 { "ac97", SND_SOC_DAIFMT_AC97 },
3393 { "pdm", SND_SOC_DAIFMT_PDM},
3394 { "msb", SND_SOC_DAIFMT_MSB },
3395 { "lsb", SND_SOC_DAIFMT_LSB },
3402 * check "[prefix]format = xxx"
3403 * SND_SOC_DAIFMT_FORMAT_MASK area
3405 snprintf(prop, sizeof(prop), "%sformat", prefix);
3406 ret = of_property_read_string(np, prop, &str);
3408 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3409 if (strcmp(str, of_fmt_table[i].name) == 0) {
3410 format |= of_fmt_table[i].val;
3417 * check "[prefix]continuous-clock"
3418 * SND_SOC_DAIFMT_CLOCK_MASK area
3420 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3421 if (of_get_property(np, prop, NULL))
3422 format |= SND_SOC_DAIFMT_CONT;
3424 format |= SND_SOC_DAIFMT_GATED;
3427 * check "[prefix]bitclock-inversion"
3428 * check "[prefix]frame-inversion"
3429 * SND_SOC_DAIFMT_INV_MASK area
3431 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3432 bit = !!of_get_property(np, prop, NULL);
3434 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3435 frame = !!of_get_property(np, prop, NULL);
3437 switch ((bit << 4) + frame) {
3439 format |= SND_SOC_DAIFMT_IB_IF;
3442 format |= SND_SOC_DAIFMT_IB_NF;
3445 format |= SND_SOC_DAIFMT_NB_IF;
3448 /* SND_SOC_DAIFMT_NB_NF is default */
3453 * check "[prefix]bitclock-master"
3454 * check "[prefix]frame-master"
3455 * SND_SOC_DAIFMT_MASTER_MASK area
3457 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3458 bit = !!of_get_property(np, prop, NULL);
3459 if (bit && bitclkmaster)
3460 *bitclkmaster = of_parse_phandle(np, prop, 0);
3462 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3463 frame = !!of_get_property(np, prop, NULL);
3464 if (frame && framemaster)
3465 *framemaster = of_parse_phandle(np, prop, 0);
3467 switch ((bit << 4) + frame) {
3469 format |= SND_SOC_DAIFMT_CBM_CFM;
3472 format |= SND_SOC_DAIFMT_CBM_CFS;
3475 format |= SND_SOC_DAIFMT_CBS_CFM;
3478 format |= SND_SOC_DAIFMT_CBS_CFS;
3484 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3486 static int snd_soc_get_dai_name(struct of_phandle_args *args,
3487 const char **dai_name)
3489 struct snd_soc_component *pos;
3490 struct device_node *component_of_node;
3491 int ret = -EPROBE_DEFER;
3493 mutex_lock(&client_mutex);
3494 list_for_each_entry(pos, &component_list, list) {
3495 component_of_node = pos->dev->of_node;
3496 if (!component_of_node && pos->dev->parent)
3497 component_of_node = pos->dev->parent->of_node;
3499 if (component_of_node != args->np)
3502 if (pos->driver->of_xlate_dai_name) {
3503 ret = pos->driver->of_xlate_dai_name(pos,
3509 switch (args->args_count) {
3511 id = 0; /* same as dai_drv[0] */
3521 if (id < 0 || id >= pos->num_dai) {
3528 *dai_name = pos->dai_drv[id].name;
3530 *dai_name = pos->name;
3535 mutex_unlock(&client_mutex);
3539 int snd_soc_of_get_dai_name(struct device_node *of_node,
3540 const char **dai_name)
3542 struct of_phandle_args args;
3545 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3546 "#sound-dai-cells", 0, &args);
3550 ret = snd_soc_get_dai_name(&args, dai_name);
3552 of_node_put(args.np);
3556 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3559 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3561 * @of_node: Device node
3562 * @dai_link: DAI link
3564 * Builds an array of CODEC DAI components from the DAI link property
3566 * The array is set in the DAI link and the number of DAIs is set accordingly.
3567 * The device nodes in the array (of_node) must be dereferenced by the caller.
3569 * Returns 0 for success
3571 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3572 struct device_node *of_node,
3573 struct snd_soc_dai_link *dai_link)
3575 struct of_phandle_args args;
3576 struct snd_soc_dai_link_component *component;
3578 int index, num_codecs, ret;
3580 /* Count the number of CODECs */
3582 num_codecs = of_count_phandle_with_args(of_node, name,
3583 "#sound-dai-cells");
3584 if (num_codecs <= 0) {
3585 if (num_codecs == -ENOENT)
3586 dev_err(dev, "No 'sound-dai' property\n");
3588 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3591 component = devm_kzalloc(dev,
3592 sizeof *component * num_codecs,
3596 dai_link->codecs = component;
3597 dai_link->num_codecs = num_codecs;
3599 /* Parse the list */
3600 for (index = 0, component = dai_link->codecs;
3601 index < dai_link->num_codecs;
3602 index++, component++) {
3603 ret = of_parse_phandle_with_args(of_node, name,
3608 component->of_node = args.np;
3609 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3615 for (index = 0, component = dai_link->codecs;
3616 index < dai_link->num_codecs;
3617 index++, component++) {
3618 if (!component->of_node)
3620 of_node_put(component->of_node);
3621 component->of_node = NULL;
3623 dai_link->codecs = NULL;
3624 dai_link->num_codecs = 0;
3627 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3629 static int __init snd_soc_init(void)
3631 snd_soc_debugfs_init();
3632 snd_soc_util_init();
3634 return platform_driver_register(&soc_driver);
3636 module_init(snd_soc_init);
3638 static void __exit snd_soc_exit(void)
3640 snd_soc_util_exit();
3641 snd_soc_debugfs_exit();
3643 #ifdef CONFIG_DEBUG_FS
3645 platform_driver_unregister(&soc_driver);
3647 module_exit(snd_soc_exit);
3649 /* Module information */
3650 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3651 MODULE_DESCRIPTION("ALSA SoC Core");
3652 MODULE_LICENSE("GPL");
3653 MODULE_ALIAS("platform:soc-audio");