2 * soc-core.c -- ALSA SoC Audio Layer
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Copyright 2005 Openedhand Ltd.
6 * Copyright (C) 2010 Slimlogic Ltd.
7 * Copyright (C) 2010 Texas Instruments Inc.
9 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 * with code, comments and ideas from :-
11 * Richard Purdie <richard@openedhand.com>
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
19 * o Add hw rules to enforce rates, etc.
20 * o More testing with other codecs/machines.
21 * o Add more codecs and platforms to ensure good API coverage.
22 * o Support TDM on PCM and I2S
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/init.h>
28 #include <linux/delay.h>
30 #include <linux/bitops.h>
31 #include <linux/debugfs.h>
32 #include <linux/platform_device.h>
33 #include <linux/pinctrl/consumer.h>
34 #include <linux/ctype.h>
35 #include <linux/slab.h>
37 #include <sound/core.h>
38 #include <sound/jack.h>
39 #include <sound/pcm.h>
40 #include <sound/pcm_params.h>
41 #include <sound/soc.h>
42 #include <sound/soc-dpcm.h>
43 #include <sound/initval.h>
45 #define CREATE_TRACE_POINTS
46 #include <trace/events/asoc.h>
50 #ifdef CONFIG_DEBUG_FS
51 struct dentry *snd_soc_debugfs_root;
52 EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
55 static DEFINE_MUTEX(client_mutex);
56 static LIST_HEAD(platform_list);
57 static LIST_HEAD(codec_list);
58 static LIST_HEAD(component_list);
61 * This is a timeout to do a DAPM powerdown after a stream is closed().
62 * It can be used to eliminate pops between different playback streams, e.g.
63 * between two audio tracks.
65 static int pmdown_time = 5000;
66 module_param(pmdown_time, int, 0);
67 MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
69 /* returns the minimum number of bytes needed to represent
70 * a particular given value */
71 static int min_bytes_needed(unsigned long val)
76 for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
79 c = (sizeof val * 8) - c;
87 /* fill buf which is 'len' bytes with a formatted
88 * string of the form 'reg: value\n' */
89 static int format_register_str(struct snd_soc_codec *codec,
90 unsigned int reg, char *buf, size_t len)
92 int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
93 int regsize = codec->driver->reg_word_size * 2;
96 /* +2 for ': ' and + 1 for '\n' */
97 if (wordsize + regsize + 2 + 1 != len)
100 sprintf(buf, "%.*x: ", wordsize, reg);
103 ret = snd_soc_read(codec, reg);
105 memset(buf, 'X', regsize);
107 sprintf(buf, "%.*x", regsize, ret);
109 /* no NUL-termination needed */
113 /* codec register dump */
114 static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
115 size_t count, loff_t pos)
118 int wordsize, regsize;
123 wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
124 regsize = codec->driver->reg_word_size * 2;
126 len = wordsize + regsize + 2 + 1;
128 if (!codec->driver->reg_cache_size)
131 if (codec->driver->reg_cache_step)
132 step = codec->driver->reg_cache_step;
134 for (i = 0; i < codec->driver->reg_cache_size; i += step) {
135 /* only support larger than PAGE_SIZE bytes debugfs
136 * entries for the default case */
138 if (total + len >= count - 1)
140 format_register_str(codec, i, buf + total, len);
146 total = min(total, count - 1);
151 static ssize_t codec_reg_show(struct device *dev,
152 struct device_attribute *attr, char *buf)
154 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
156 return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
159 static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
161 static ssize_t pmdown_time_show(struct device *dev,
162 struct device_attribute *attr, char *buf)
164 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
166 return sprintf(buf, "%ld\n", rtd->pmdown_time);
169 static ssize_t pmdown_time_set(struct device *dev,
170 struct device_attribute *attr,
171 const char *buf, size_t count)
173 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
176 ret = kstrtol(buf, 10, &rtd->pmdown_time);
183 static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
185 static struct attribute *soc_dev_attrs[] = {
186 &dev_attr_codec_reg.attr,
187 &dev_attr_pmdown_time.attr,
191 static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
192 struct attribute *attr, int idx)
194 struct device *dev = kobj_to_dev(kobj);
195 struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
197 if (attr == &dev_attr_pmdown_time.attr)
198 return attr->mode; /* always visible */
199 return rtd->codec ? attr->mode : 0; /* enabled only with codec */
202 static const struct attribute_group soc_dapm_dev_group = {
203 .attrs = soc_dapm_dev_attrs,
204 .is_visible = soc_dev_attr_is_visible,
207 static const struct attribute_group soc_dev_roup = {
208 .attrs = soc_dev_attrs,
209 .is_visible = soc_dev_attr_is_visible,
212 static const struct attribute_group *soc_dev_attr_groups[] = {
218 #ifdef CONFIG_DEBUG_FS
219 static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
220 size_t count, loff_t *ppos)
223 struct snd_soc_codec *codec = file->private_data;
226 if (*ppos < 0 || !count)
229 buf = kmalloc(count, GFP_KERNEL);
233 ret = soc_codec_reg_show(codec, buf, count, *ppos);
235 if (copy_to_user(user_buf, buf, ret)) {
246 static ssize_t codec_reg_write_file(struct file *file,
247 const char __user *user_buf, size_t count, loff_t *ppos)
252 unsigned long reg, value;
253 struct snd_soc_codec *codec = file->private_data;
256 buf_size = min(count, (sizeof(buf)-1));
257 if (copy_from_user(buf, user_buf, buf_size))
261 while (*start == ' ')
263 reg = simple_strtoul(start, &start, 16);
264 while (*start == ' ')
266 ret = kstrtoul(start, 16, &value);
270 /* Userspace has been fiddling around behind the kernel's back */
271 add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
273 snd_soc_write(codec, reg, value);
277 static const struct file_operations codec_reg_fops = {
279 .read = codec_reg_read_file,
280 .write = codec_reg_write_file,
281 .llseek = default_llseek,
284 static void soc_init_component_debugfs(struct snd_soc_component *component)
286 if (!component->card->debugfs_card_root)
289 if (component->debugfs_prefix) {
292 name = kasprintf(GFP_KERNEL, "%s:%s",
293 component->debugfs_prefix, component->name);
295 component->debugfs_root = debugfs_create_dir(name,
296 component->card->debugfs_card_root);
300 component->debugfs_root = debugfs_create_dir(component->name,
301 component->card->debugfs_card_root);
304 if (!component->debugfs_root) {
305 dev_warn(component->dev,
306 "ASoC: Failed to create component debugfs directory\n");
310 snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
311 component->debugfs_root);
313 if (component->init_debugfs)
314 component->init_debugfs(component);
317 static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
319 debugfs_remove_recursive(component->debugfs_root);
322 static void soc_init_codec_debugfs(struct snd_soc_component *component)
324 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
326 codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
327 codec->component.debugfs_root,
328 codec, &codec_reg_fops);
329 if (!codec->debugfs_reg)
331 "ASoC: Failed to create codec register debugfs file\n");
334 static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
335 size_t count, loff_t *ppos)
337 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
338 ssize_t len, ret = 0;
339 struct snd_soc_codec *codec;
344 mutex_lock(&client_mutex);
346 list_for_each_entry(codec, &codec_list, list) {
347 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
348 codec->component.name);
351 if (ret > PAGE_SIZE) {
357 mutex_unlock(&client_mutex);
360 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
367 static const struct file_operations codec_list_fops = {
368 .read = codec_list_read_file,
369 .llseek = default_llseek,/* read accesses f_pos */
372 static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
373 size_t count, loff_t *ppos)
375 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
376 ssize_t len, ret = 0;
377 struct snd_soc_component *component;
378 struct snd_soc_dai *dai;
383 mutex_lock(&client_mutex);
385 list_for_each_entry(component, &component_list, list) {
386 list_for_each_entry(dai, &component->dai_list, list) {
387 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
391 if (ret > PAGE_SIZE) {
398 mutex_unlock(&client_mutex);
400 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
407 static const struct file_operations dai_list_fops = {
408 .read = dai_list_read_file,
409 .llseek = default_llseek,/* read accesses f_pos */
412 static ssize_t platform_list_read_file(struct file *file,
413 char __user *user_buf,
414 size_t count, loff_t *ppos)
416 char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
417 ssize_t len, ret = 0;
418 struct snd_soc_platform *platform;
423 mutex_lock(&client_mutex);
425 list_for_each_entry(platform, &platform_list, list) {
426 len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
427 platform->component.name);
430 if (ret > PAGE_SIZE) {
436 mutex_unlock(&client_mutex);
438 ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
445 static const struct file_operations platform_list_fops = {
446 .read = platform_list_read_file,
447 .llseek = default_llseek,/* read accesses f_pos */
450 static void soc_init_card_debugfs(struct snd_soc_card *card)
452 if (!snd_soc_debugfs_root)
455 card->debugfs_card_root = debugfs_create_dir(card->name,
456 snd_soc_debugfs_root);
457 if (!card->debugfs_card_root) {
459 "ASoC: Failed to create card debugfs directory\n");
463 card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
464 card->debugfs_card_root,
466 if (!card->debugfs_pop_time)
468 "ASoC: Failed to create pop time debugfs file\n");
471 static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
473 debugfs_remove_recursive(card->debugfs_card_root);
477 static void snd_soc_debugfs_init(void)
479 snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
480 if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
481 pr_warn("ASoC: Failed to create debugfs directory\n");
482 snd_soc_debugfs_root = NULL;
486 if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
488 pr_warn("ASoC: Failed to create CODEC list debugfs file\n");
490 if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
492 pr_warn("ASoC: Failed to create DAI list debugfs file\n");
494 if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
495 &platform_list_fops))
496 pr_warn("ASoC: Failed to create platform list debugfs file\n");
499 static void snd_soc_debugfs_exit(void)
501 debugfs_remove_recursive(snd_soc_debugfs_root);
506 #define soc_init_codec_debugfs NULL
508 static inline void soc_init_component_debugfs(
509 struct snd_soc_component *component)
513 static inline void soc_cleanup_component_debugfs(
514 struct snd_soc_component *component)
518 static inline void soc_init_card_debugfs(struct snd_soc_card *card)
522 static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
526 static inline void snd_soc_debugfs_init(void)
530 static inline void snd_soc_debugfs_exit(void)
536 struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
537 const char *dai_link, int stream)
541 for (i = 0; i < card->num_links; i++) {
542 if (card->rtd[i].dai_link->no_pcm &&
543 !strcmp(card->rtd[i].dai_link->name, dai_link))
544 return card->rtd[i].pcm->streams[stream].substream;
546 dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
549 EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);
551 struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
552 const char *dai_link)
556 for (i = 0; i < card->num_links; i++) {
557 if (!strcmp(card->rtd[i].dai_link->name, dai_link))
558 return &card->rtd[i];
560 dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
563 EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);
565 static void codec2codec_close_delayed_work(struct work_struct *work)
567 /* Currently nothing to do for c2c links
568 * Since c2c links are internal nodes in the DAPM graph and
569 * don't interface with the outside world or application layer
570 * we don't have to do any special handling on close.
574 #ifdef CONFIG_PM_SLEEP
575 /* powers down audio subsystem for suspend */
576 int snd_soc_suspend(struct device *dev)
578 struct snd_soc_card *card = dev_get_drvdata(dev);
579 struct snd_soc_codec *codec;
582 /* If the card is not initialized yet there is nothing to do */
583 if (!card->instantiated)
586 /* Due to the resume being scheduled into a workqueue we could
587 * suspend before that's finished - wait for it to complete.
589 snd_power_lock(card->snd_card);
590 snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
591 snd_power_unlock(card->snd_card);
593 /* we're going to block userspace touching us until resume completes */
594 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
596 /* mute any active DACs */
597 for (i = 0; i < card->num_rtd; i++) {
599 if (card->rtd[i].dai_link->ignore_suspend)
602 for (j = 0; j < card->rtd[i].num_codecs; j++) {
603 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
604 struct snd_soc_dai_driver *drv = dai->driver;
606 if (drv->ops->digital_mute && dai->playback_active)
607 drv->ops->digital_mute(dai, 1);
611 /* suspend all pcms */
612 for (i = 0; i < card->num_rtd; i++) {
613 if (card->rtd[i].dai_link->ignore_suspend)
616 snd_pcm_suspend_all(card->rtd[i].pcm);
619 if (card->suspend_pre)
620 card->suspend_pre(card);
622 for (i = 0; i < card->num_rtd; i++) {
623 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
625 if (card->rtd[i].dai_link->ignore_suspend)
628 if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
629 cpu_dai->driver->suspend(cpu_dai);
632 /* close any waiting streams */
633 for (i = 0; i < card->num_rtd; i++)
634 flush_delayed_work(&card->rtd[i].delayed_work);
636 for (i = 0; i < card->num_rtd; i++) {
638 if (card->rtd[i].dai_link->ignore_suspend)
641 snd_soc_dapm_stream_event(&card->rtd[i],
642 SNDRV_PCM_STREAM_PLAYBACK,
643 SND_SOC_DAPM_STREAM_SUSPEND);
645 snd_soc_dapm_stream_event(&card->rtd[i],
646 SNDRV_PCM_STREAM_CAPTURE,
647 SND_SOC_DAPM_STREAM_SUSPEND);
650 /* Recheck all endpoints too, their state is affected by suspend */
651 dapm_mark_endpoints_dirty(card);
652 snd_soc_dapm_sync(&card->dapm);
654 /* suspend all CODECs */
655 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
656 /* If there are paths active then the CODEC will be held with
657 * bias _ON and should not be suspended. */
658 if (!codec->suspended) {
659 switch (codec->dapm.bias_level) {
660 case SND_SOC_BIAS_STANDBY:
662 * If the CODEC is capable of idle
663 * bias off then being in STANDBY
664 * means it's doing something,
665 * otherwise fall through.
667 if (codec->dapm.idle_bias_off) {
669 "ASoC: idle_bias_off CODEC on over suspend\n");
673 case SND_SOC_BIAS_OFF:
674 if (codec->driver->suspend)
675 codec->driver->suspend(codec);
676 codec->suspended = 1;
677 if (codec->component.regmap)
678 regcache_mark_dirty(codec->component.regmap);
679 /* deactivate pins to sleep state */
680 pinctrl_pm_select_sleep_state(codec->dev);
684 "ASoC: CODEC is on over suspend\n");
690 for (i = 0; i < card->num_rtd; i++) {
691 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
693 if (card->rtd[i].dai_link->ignore_suspend)
696 if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
697 cpu_dai->driver->suspend(cpu_dai);
699 /* deactivate pins to sleep state */
700 pinctrl_pm_select_sleep_state(cpu_dai->dev);
703 if (card->suspend_post)
704 card->suspend_post(card);
708 EXPORT_SYMBOL_GPL(snd_soc_suspend);
710 /* deferred resume work, so resume can complete before we finished
711 * setting our codec back up, which can be very slow on I2C
713 static void soc_resume_deferred(struct work_struct *work)
715 struct snd_soc_card *card =
716 container_of(work, struct snd_soc_card, deferred_resume_work);
717 struct snd_soc_codec *codec;
720 /* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
721 * so userspace apps are blocked from touching us
724 dev_dbg(card->dev, "ASoC: starting resume work\n");
726 /* Bring us up into D2 so that DAPM starts enabling things */
727 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
729 if (card->resume_pre)
730 card->resume_pre(card);
732 /* resume control bus DAIs */
733 for (i = 0; i < card->num_rtd; i++) {
734 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
736 if (card->rtd[i].dai_link->ignore_suspend)
739 if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
740 cpu_dai->driver->resume(cpu_dai);
743 list_for_each_entry(codec, &card->codec_dev_list, card_list) {
744 if (codec->suspended) {
745 if (codec->driver->resume)
746 codec->driver->resume(codec);
747 codec->suspended = 0;
751 for (i = 0; i < card->num_rtd; i++) {
753 if (card->rtd[i].dai_link->ignore_suspend)
756 snd_soc_dapm_stream_event(&card->rtd[i],
757 SNDRV_PCM_STREAM_PLAYBACK,
758 SND_SOC_DAPM_STREAM_RESUME);
760 snd_soc_dapm_stream_event(&card->rtd[i],
761 SNDRV_PCM_STREAM_CAPTURE,
762 SND_SOC_DAPM_STREAM_RESUME);
765 /* unmute any active DACs */
766 for (i = 0; i < card->num_rtd; i++) {
768 if (card->rtd[i].dai_link->ignore_suspend)
771 for (j = 0; j < card->rtd[i].num_codecs; j++) {
772 struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
773 struct snd_soc_dai_driver *drv = dai->driver;
775 if (drv->ops->digital_mute && dai->playback_active)
776 drv->ops->digital_mute(dai, 0);
780 for (i = 0; i < card->num_rtd; i++) {
781 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
783 if (card->rtd[i].dai_link->ignore_suspend)
786 if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
787 cpu_dai->driver->resume(cpu_dai);
790 if (card->resume_post)
791 card->resume_post(card);
793 dev_dbg(card->dev, "ASoC: resume work completed\n");
795 /* userspace can access us now we are back as we were before */
796 snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
798 /* Recheck all endpoints too, their state is affected by suspend */
799 dapm_mark_endpoints_dirty(card);
800 snd_soc_dapm_sync(&card->dapm);
803 /* powers up audio subsystem after a suspend */
804 int snd_soc_resume(struct device *dev)
806 struct snd_soc_card *card = dev_get_drvdata(dev);
807 bool bus_control = false;
810 /* If the card is not initialized yet there is nothing to do */
811 if (!card->instantiated)
814 /* activate pins from sleep state */
815 for (i = 0; i < card->num_rtd; i++) {
816 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
817 struct snd_soc_dai **codec_dais = rtd->codec_dais;
818 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
822 pinctrl_pm_select_default_state(cpu_dai->dev);
824 for (j = 0; j < rtd->num_codecs; j++) {
825 struct snd_soc_dai *codec_dai = codec_dais[j];
826 if (codec_dai->active)
827 pinctrl_pm_select_default_state(codec_dai->dev);
832 * DAIs that also act as the control bus master might have other drivers
833 * hanging off them so need to resume immediately. Other drivers don't
834 * have that problem and may take a substantial amount of time to resume
835 * due to I/O costs and anti-pop so handle them out of line.
837 for (i = 0; i < card->num_rtd; i++) {
838 struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
839 bus_control |= cpu_dai->driver->bus_control;
842 dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
843 soc_resume_deferred(&card->deferred_resume_work);
845 dev_dbg(dev, "ASoC: Scheduling resume work\n");
846 if (!schedule_work(&card->deferred_resume_work))
847 dev_err(dev, "ASoC: resume work item may be lost\n");
852 EXPORT_SYMBOL_GPL(snd_soc_resume);
854 #define snd_soc_suspend NULL
855 #define snd_soc_resume NULL
858 static const struct snd_soc_dai_ops null_dai_ops = {
861 static struct snd_soc_component *soc_find_component(
862 const struct device_node *of_node, const char *name)
864 struct snd_soc_component *component;
866 lockdep_assert_held(&client_mutex);
868 list_for_each_entry(component, &component_list, list) {
870 if (component->dev->of_node == of_node)
872 } else if (strcmp(component->name, name) == 0) {
880 static struct snd_soc_dai *snd_soc_find_dai(
881 const struct snd_soc_dai_link_component *dlc)
883 struct snd_soc_component *component;
884 struct snd_soc_dai *dai;
885 struct device_node *component_of_node;
887 lockdep_assert_held(&client_mutex);
889 /* Find CPU DAI from registered DAIs*/
890 list_for_each_entry(component, &component_list, list) {
891 component_of_node = component->dev->of_node;
892 if (!component_of_node && component->dev->parent)
893 component_of_node = component->dev->parent->of_node;
895 if (dlc->of_node && component_of_node != dlc->of_node)
897 if (dlc->name && strcmp(component->name, dlc->name))
899 list_for_each_entry(dai, &component->dai_list, list) {
900 if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
910 static int soc_bind_dai_link(struct snd_soc_card *card, int num)
912 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
913 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
914 struct snd_soc_dai_link_component *codecs = dai_link->codecs;
915 struct snd_soc_dai_link_component cpu_dai_component;
916 struct snd_soc_dai **codec_dais = rtd->codec_dais;
917 struct snd_soc_platform *platform;
918 const char *platform_name;
921 dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
923 cpu_dai_component.name = dai_link->cpu_name;
924 cpu_dai_component.of_node = dai_link->cpu_of_node;
925 cpu_dai_component.dai_name = dai_link->cpu_dai_name;
926 rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
928 dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
929 dai_link->cpu_dai_name);
930 return -EPROBE_DEFER;
933 rtd->num_codecs = dai_link->num_codecs;
935 /* Find CODEC from registered CODECs */
936 for (i = 0; i < rtd->num_codecs; i++) {
937 codec_dais[i] = snd_soc_find_dai(&codecs[i]);
938 if (!codec_dais[i]) {
939 dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
941 return -EPROBE_DEFER;
945 /* Single codec links expect codec and codec_dai in runtime data */
946 rtd->codec_dai = codec_dais[0];
947 rtd->codec = rtd->codec_dai->codec;
949 /* if there's no platform we match on the empty platform */
950 platform_name = dai_link->platform_name;
951 if (!platform_name && !dai_link->platform_of_node)
952 platform_name = "snd-soc-dummy";
954 /* find one from the set of registered platforms */
955 list_for_each_entry(platform, &platform_list, list) {
956 if (dai_link->platform_of_node) {
957 if (platform->dev->of_node !=
958 dai_link->platform_of_node)
961 if (strcmp(platform->component.name, platform_name))
965 rtd->platform = platform;
967 if (!rtd->platform) {
968 dev_err(card->dev, "ASoC: platform %s not registered\n",
969 dai_link->platform_name);
970 return -EPROBE_DEFER;
978 static void soc_remove_component(struct snd_soc_component *component)
980 if (!component->probed)
983 /* This is a HACK and will be removed soon */
984 if (component->codec)
985 list_del(&component->codec->card_list);
987 if (component->remove)
988 component->remove(component);
990 snd_soc_dapm_free(snd_soc_component_get_dapm(component));
992 soc_cleanup_component_debugfs(component);
993 component->probed = 0;
994 module_put(component->dev->driver->owner);
997 static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1001 if (dai && dai->probed &&
1002 dai->driver->remove_order == order) {
1003 if (dai->driver->remove) {
1004 err = dai->driver->remove(dai);
1007 "ASoC: failed to remove %s: %d\n",
1014 static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
1016 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1019 /* unregister the rtd device */
1020 if (rtd->dev_registered) {
1021 device_unregister(rtd->dev);
1022 rtd->dev_registered = 0;
1025 /* remove the CODEC DAI */
1026 for (i = 0; i < rtd->num_codecs; i++)
1027 soc_remove_dai(rtd->codec_dais[i], order);
1029 soc_remove_dai(rtd->cpu_dai, order);
1032 static void soc_remove_link_components(struct snd_soc_card *card, int num,
1035 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1036 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1037 struct snd_soc_platform *platform = rtd->platform;
1038 struct snd_soc_component *component;
1041 /* remove the platform */
1042 if (platform && platform->component.driver->remove_order == order)
1043 soc_remove_component(&platform->component);
1045 /* remove the CODEC-side CODEC */
1046 for (i = 0; i < rtd->num_codecs; i++) {
1047 component = rtd->codec_dais[i]->component;
1048 if (component->driver->remove_order == order)
1049 soc_remove_component(component);
1052 /* remove any CPU-side CODEC */
1054 if (cpu_dai->component->driver->remove_order == order)
1055 soc_remove_component(cpu_dai->component);
1059 static void soc_remove_dai_links(struct snd_soc_card *card)
1063 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1065 for (dai = 0; dai < card->num_rtd; dai++)
1066 soc_remove_link_dais(card, dai, order);
1069 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1071 for (dai = 0; dai < card->num_rtd; dai++)
1072 soc_remove_link_components(card, dai, order);
1078 static void soc_set_name_prefix(struct snd_soc_card *card,
1079 struct snd_soc_component *component)
1083 if (card->codec_conf == NULL)
1086 for (i = 0; i < card->num_configs; i++) {
1087 struct snd_soc_codec_conf *map = &card->codec_conf[i];
1088 if (map->of_node && component->dev->of_node != map->of_node)
1090 if (map->dev_name && strcmp(component->name, map->dev_name))
1092 component->name_prefix = map->name_prefix;
1097 static int soc_probe_component(struct snd_soc_card *card,
1098 struct snd_soc_component *component)
1100 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1101 struct snd_soc_dai *dai;
1104 if (component->probed)
1107 component->card = card;
1109 soc_set_name_prefix(card, component);
1111 if (!try_module_get(component->dev->driver->owner))
1114 soc_init_component_debugfs(component);
1116 if (component->dapm_widgets) {
1117 ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
1118 component->num_dapm_widgets);
1121 dev_err(component->dev,
1122 "Failed to create new controls %d\n", ret);
1127 list_for_each_entry(dai, &component->dai_list, list) {
1128 ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1130 dev_err(component->dev,
1131 "Failed to create DAI widgets %d\n", ret);
1136 if (component->probe) {
1137 ret = component->probe(component);
1139 dev_err(component->dev,
1140 "ASoC: failed to probe component %d\n", ret);
1144 WARN(dapm->idle_bias_off &&
1145 dapm->bias_level != SND_SOC_BIAS_OFF,
1146 "codec %s can not start from non-off bias with idle_bias_off==1\n",
1150 if (component->controls)
1151 snd_soc_add_component_controls(component, component->controls,
1152 component->num_controls);
1153 if (component->dapm_routes)
1154 snd_soc_dapm_add_routes(dapm, component->dapm_routes,
1155 component->num_dapm_routes);
1157 component->probed = 1;
1158 list_add(&dapm->list, &card->dapm_list);
1160 /* This is a HACK and will be removed soon */
1161 if (component->codec)
1162 list_add(&component->codec->card_list, &card->codec_dev_list);
1167 soc_cleanup_component_debugfs(component);
1168 module_put(component->dev->driver->owner);
1173 static void rtd_release(struct device *dev)
1178 static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
1183 /* register the rtd device */
1184 rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
1187 device_initialize(rtd->dev);
1188 rtd->dev->parent = rtd->card->dev;
1189 rtd->dev->release = rtd_release;
1190 rtd->dev->groups = soc_dev_attr_groups;
1191 dev_set_name(rtd->dev, "%s", name);
1192 dev_set_drvdata(rtd->dev, rtd);
1193 mutex_init(&rtd->pcm_mutex);
1194 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
1195 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
1196 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
1197 INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1198 ret = device_add(rtd->dev);
1200 /* calling put_device() here to free the rtd->dev */
1201 put_device(rtd->dev);
1202 dev_err(rtd->card->dev,
1203 "ASoC: failed to register runtime device: %d\n", ret);
1206 rtd->dev_registered = 1;
1210 static int soc_probe_link_components(struct snd_soc_card *card, int num,
1213 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1214 struct snd_soc_platform *platform = rtd->platform;
1215 struct snd_soc_component *component;
1218 /* probe the CPU-side component, if it is a CODEC */
1219 component = rtd->cpu_dai->component;
1220 if (component->driver->probe_order == order) {
1221 ret = soc_probe_component(card, component);
1226 /* probe the CODEC-side components */
1227 for (i = 0; i < rtd->num_codecs; i++) {
1228 component = rtd->codec_dais[i]->component;
1229 if (component->driver->probe_order == order) {
1230 ret = soc_probe_component(card, component);
1236 /* probe the platform */
1237 if (platform->component.driver->probe_order == order) {
1238 ret = soc_probe_component(card, &platform->component);
1246 static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1250 if (!dai->probed && dai->driver->probe_order == order) {
1251 if (dai->driver->probe) {
1252 ret = dai->driver->probe(dai);
1255 "ASoC: failed to probe DAI %s: %d\n",
1267 static int soc_link_dai_widgets(struct snd_soc_card *card,
1268 struct snd_soc_dai_link *dai_link,
1269 struct snd_soc_pcm_runtime *rtd)
1271 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1272 struct snd_soc_dai *codec_dai = rtd->codec_dai;
1273 struct snd_soc_dapm_widget *play_w, *capture_w;
1276 if (rtd->num_codecs > 1)
1277 dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");
1279 /* link the DAI widgets */
1280 play_w = codec_dai->playback_widget;
1281 capture_w = cpu_dai->capture_widget;
1282 if (play_w && capture_w) {
1283 ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1284 dai_link->num_params, capture_w,
1287 dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1288 play_w->name, capture_w->name, ret);
1293 play_w = cpu_dai->playback_widget;
1294 capture_w = codec_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);
1309 static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1311 struct snd_soc_dai_link *dai_link = &card->dai_link[num];
1312 struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1313 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1316 dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1317 card->name, num, order);
1319 /* set default power off timeout */
1320 rtd->pmdown_time = pmdown_time;
1322 ret = soc_probe_dai(cpu_dai, order);
1326 /* probe the CODEC DAI */
1327 for (i = 0; i < rtd->num_codecs; i++) {
1328 ret = soc_probe_dai(rtd->codec_dais[i], order);
1333 /* complete DAI probe during last probe */
1334 if (order != SND_SOC_COMP_ORDER_LAST)
1337 /* do machine specific initialization */
1338 if (dai_link->init) {
1339 ret = dai_link->init(rtd);
1341 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1342 dai_link->name, ret);
1347 if (dai_link->dai_fmt)
1348 snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
1350 ret = soc_post_component_init(rtd, dai_link->name);
1354 #ifdef CONFIG_DEBUG_FS
1355 /* add DPCM sysfs entries */
1356 if (dai_link->dynamic)
1357 soc_dpcm_debugfs_add(rtd);
1360 if (cpu_dai->driver->compress_dai) {
1361 /*create compress_device"*/
1362 ret = soc_new_compress(rtd, num);
1364 dev_err(card->dev, "ASoC: can't create compress %s\n",
1365 dai_link->stream_name);
1370 if (!dai_link->params) {
1371 /* create the pcm */
1372 ret = soc_new_pcm(rtd, num);
1374 dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1375 dai_link->stream_name, ret);
1379 INIT_DELAYED_WORK(&rtd->delayed_work,
1380 codec2codec_close_delayed_work);
1382 /* link the DAI widgets */
1383 ret = soc_link_dai_widgets(card, dai_link, rtd);
1392 static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1394 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1395 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1396 const char *name = aux_dev->codec_name;
1398 rtd->component = soc_find_component(aux_dev->codec_of_node, name);
1399 if (!rtd->component) {
1400 if (aux_dev->codec_of_node)
1401 name = of_node_full_name(aux_dev->codec_of_node);
1403 dev_err(card->dev, "ASoC: %s not registered\n", name);
1404 return -EPROBE_DEFER;
1408 * Some places still reference rtd->codec, so we have to keep that
1409 * initialized if the component is a CODEC. Once all those references
1410 * have been removed, this code can be removed as well.
1412 rtd->codec = rtd->component->codec;
1417 static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
1419 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1420 struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1423 ret = soc_probe_component(card, rtd->component);
1427 /* do machine specific initialization */
1428 if (aux_dev->init) {
1429 ret = aux_dev->init(rtd->component);
1431 dev_err(card->dev, "ASoC: failed to init %s: %d\n",
1432 aux_dev->name, ret);
1437 return soc_post_component_init(rtd, aux_dev->name);
1440 static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
1442 struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1443 struct snd_soc_component *component = rtd->component;
1445 /* unregister the rtd device */
1446 if (rtd->dev_registered) {
1447 device_unregister(rtd->dev);
1448 rtd->dev_registered = 0;
1451 if (component && component->probed)
1452 soc_remove_component(component);
1455 static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1459 if (codec->cache_init)
1462 ret = snd_soc_cache_init(codec);
1465 "ASoC: Failed to set cache compression type: %d\n",
1469 codec->cache_init = 1;
1474 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
1475 * @rtd: The runtime for which the DAI link format should be changed
1476 * @dai_fmt: The new DAI link format
1478 * This function updates the DAI link format for all DAIs connected to the DAI
1479 * link for the specified runtime.
1481 * Note: For setups with a static format set the dai_fmt field in the
1482 * corresponding snd_dai_link struct instead of using this function.
1484 * Returns 0 on success, otherwise a negative error code.
1486 int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
1487 unsigned int dai_fmt)
1489 struct snd_soc_dai **codec_dais = rtd->codec_dais;
1490 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1494 for (i = 0; i < rtd->num_codecs; i++) {
1495 struct snd_soc_dai *codec_dai = codec_dais[i];
1497 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
1498 if (ret != 0 && ret != -ENOTSUPP) {
1499 dev_warn(codec_dai->dev,
1500 "ASoC: Failed to set DAI format: %d\n", ret);
1505 /* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
1506 if (cpu_dai->codec) {
1507 unsigned int inv_dai_fmt;
1509 inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
1510 switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
1511 case SND_SOC_DAIFMT_CBM_CFM:
1512 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
1514 case SND_SOC_DAIFMT_CBM_CFS:
1515 inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
1517 case SND_SOC_DAIFMT_CBS_CFM:
1518 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
1520 case SND_SOC_DAIFMT_CBS_CFS:
1521 inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
1525 dai_fmt = inv_dai_fmt;
1528 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
1529 if (ret != 0 && ret != -ENOTSUPP) {
1530 dev_warn(cpu_dai->dev,
1531 "ASoC: Failed to set DAI format: %d\n", ret);
1537 EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1539 static int snd_soc_instantiate_card(struct snd_soc_card *card)
1541 struct snd_soc_codec *codec;
1544 mutex_lock(&client_mutex);
1545 mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1548 for (i = 0; i < card->num_links; i++) {
1549 ret = soc_bind_dai_link(card, i);
1554 /* bind aux_devs too */
1555 for (i = 0; i < card->num_aux_devs; i++) {
1556 ret = soc_bind_aux_dev(card, i);
1561 /* initialize the register cache for each available codec */
1562 list_for_each_entry(codec, &codec_list, list) {
1563 if (codec->cache_init)
1565 ret = snd_soc_init_codec_cache(codec);
1570 /* card bind complete so register a sound card */
1571 ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1572 card->owner, 0, &card->snd_card);
1575 "ASoC: can't create sound card for card %s: %d\n",
1580 soc_init_card_debugfs(card);
1582 card->dapm.bias_level = SND_SOC_BIAS_OFF;
1583 card->dapm.dev = card->dev;
1584 card->dapm.card = card;
1585 list_add(&card->dapm.list, &card->dapm_list);
1587 #ifdef CONFIG_DEBUG_FS
1588 snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
1591 #ifdef CONFIG_PM_SLEEP
1592 /* deferred resume work */
1593 INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
1596 if (card->dapm_widgets)
1597 snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
1598 card->num_dapm_widgets);
1600 if (card->of_dapm_widgets)
1601 snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
1602 card->num_of_dapm_widgets);
1604 /* initialise the sound card only once */
1606 ret = card->probe(card);
1608 goto card_probe_error;
1611 /* probe all components used by DAI links on this card */
1612 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1614 for (i = 0; i < card->num_links; i++) {
1615 ret = soc_probe_link_components(card, i, order);
1618 "ASoC: failed to instantiate card %d\n",
1625 /* probe all DAI links on this card */
1626 for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
1628 for (i = 0; i < card->num_links; i++) {
1629 ret = soc_probe_link_dais(card, i, order);
1632 "ASoC: failed to instantiate card %d\n",
1639 for (i = 0; i < card->num_aux_devs; i++) {
1640 ret = soc_probe_aux_dev(card, i);
1643 "ASoC: failed to add auxiliary devices %d\n",
1645 goto probe_aux_dev_err;
1649 snd_soc_dapm_link_dai_widgets(card);
1650 snd_soc_dapm_connect_dai_link_widgets(card);
1653 snd_soc_add_card_controls(card, card->controls, card->num_controls);
1655 if (card->dapm_routes)
1656 snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
1657 card->num_dapm_routes);
1659 if (card->of_dapm_routes)
1660 snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
1661 card->num_of_dapm_routes);
1663 snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
1665 snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
1666 "%s", card->long_name ? card->long_name : card->name);
1667 snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
1668 "%s", card->driver_name ? card->driver_name : card->name);
1669 for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
1670 switch (card->snd_card->driver[i]) {
1676 if (!isalnum(card->snd_card->driver[i]))
1677 card->snd_card->driver[i] = '_';
1682 if (card->late_probe) {
1683 ret = card->late_probe(card);
1685 dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1687 goto probe_aux_dev_err;
1691 snd_soc_dapm_new_widgets(card);
1693 ret = snd_card_register(card->snd_card);
1695 dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
1697 goto probe_aux_dev_err;
1700 card->instantiated = 1;
1701 snd_soc_dapm_sync(&card->dapm);
1702 mutex_unlock(&card->mutex);
1703 mutex_unlock(&client_mutex);
1708 for (i = 0; i < card->num_aux_devs; i++)
1709 soc_remove_aux_dev(card, i);
1712 soc_remove_dai_links(card);
1718 soc_cleanup_card_debugfs(card);
1719 snd_card_free(card->snd_card);
1722 mutex_unlock(&card->mutex);
1723 mutex_unlock(&client_mutex);
1728 /* probes a new socdev */
1729 static int soc_probe(struct platform_device *pdev)
1731 struct snd_soc_card *card = platform_get_drvdata(pdev);
1734 * no card, so machine driver should be registering card
1735 * we should not be here in that case so ret error
1740 dev_warn(&pdev->dev,
1741 "ASoC: machine %s should use snd_soc_register_card()\n",
1744 /* Bodge while we unpick instantiation */
1745 card->dev = &pdev->dev;
1747 return snd_soc_register_card(card);
1750 static int soc_cleanup_card_resources(struct snd_soc_card *card)
1754 /* make sure any delayed work runs */
1755 for (i = 0; i < card->num_rtd; i++) {
1756 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1757 flush_delayed_work(&rtd->delayed_work);
1760 /* remove auxiliary devices */
1761 for (i = 0; i < card->num_aux_devs; i++)
1762 soc_remove_aux_dev(card, i);
1764 /* remove and free each DAI */
1765 soc_remove_dai_links(card);
1767 soc_cleanup_card_debugfs(card);
1769 /* remove the card */
1773 snd_soc_dapm_free(&card->dapm);
1775 snd_card_free(card->snd_card);
1780 /* removes a socdev */
1781 static int soc_remove(struct platform_device *pdev)
1783 struct snd_soc_card *card = platform_get_drvdata(pdev);
1785 snd_soc_unregister_card(card);
1789 int snd_soc_poweroff(struct device *dev)
1791 struct snd_soc_card *card = dev_get_drvdata(dev);
1794 if (!card->instantiated)
1797 /* Flush out pmdown_time work - we actually do want to run it
1798 * now, we're shutting down so no imminent restart. */
1799 for (i = 0; i < card->num_rtd; i++) {
1800 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1801 flush_delayed_work(&rtd->delayed_work);
1804 snd_soc_dapm_shutdown(card);
1806 /* deactivate pins to sleep state */
1807 for (i = 0; i < card->num_rtd; i++) {
1808 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1809 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1812 pinctrl_pm_select_sleep_state(cpu_dai->dev);
1813 for (j = 0; j < rtd->num_codecs; j++) {
1814 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
1815 pinctrl_pm_select_sleep_state(codec_dai->dev);
1821 EXPORT_SYMBOL_GPL(snd_soc_poweroff);
1823 const struct dev_pm_ops snd_soc_pm_ops = {
1824 .suspend = snd_soc_suspend,
1825 .resume = snd_soc_resume,
1826 .freeze = snd_soc_suspend,
1827 .thaw = snd_soc_resume,
1828 .poweroff = snd_soc_poweroff,
1829 .restore = snd_soc_resume,
1831 EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
1833 /* ASoC platform driver */
1834 static struct platform_driver soc_driver = {
1836 .name = "soc-audio",
1837 .pm = &snd_soc_pm_ops,
1840 .remove = soc_remove,
1844 * snd_soc_cnew - create new control
1845 * @_template: control template
1846 * @data: control private data
1847 * @long_name: control long name
1848 * @prefix: control name prefix
1850 * Create a new mixer control from a template control.
1852 * Returns 0 for success, else error.
1854 struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
1855 void *data, const char *long_name,
1858 struct snd_kcontrol_new template;
1859 struct snd_kcontrol *kcontrol;
1862 memcpy(&template, _template, sizeof(template));
1866 long_name = template.name;
1869 name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
1873 template.name = name;
1875 template.name = long_name;
1878 kcontrol = snd_ctl_new1(&template, data);
1884 EXPORT_SYMBOL_GPL(snd_soc_cnew);
1886 static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
1887 const struct snd_kcontrol_new *controls, int num_controls,
1888 const char *prefix, void *data)
1892 for (i = 0; i < num_controls; i++) {
1893 const struct snd_kcontrol_new *control = &controls[i];
1894 err = snd_ctl_add(card, snd_soc_cnew(control, data,
1895 control->name, prefix));
1897 dev_err(dev, "ASoC: Failed to add %s: %d\n",
1898 control->name, err);
1906 struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
1909 struct snd_card *card = soc_card->snd_card;
1910 struct snd_kcontrol *kctl;
1912 if (unlikely(!name))
1915 list_for_each_entry(kctl, &card->controls, list)
1916 if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
1920 EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);
1923 * snd_soc_add_component_controls - Add an array of controls to a component.
1925 * @component: Component to add controls to
1926 * @controls: Array of controls to add
1927 * @num_controls: Number of elements in the array
1929 * Return: 0 for success, else error.
1931 int snd_soc_add_component_controls(struct snd_soc_component *component,
1932 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1934 struct snd_card *card = component->card->snd_card;
1936 return snd_soc_add_controls(card, component->dev, controls,
1937 num_controls, component->name_prefix, component);
1939 EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);
1942 * snd_soc_add_codec_controls - add an array of controls to a codec.
1943 * Convenience function to add a list of controls. Many codecs were
1944 * duplicating this code.
1946 * @codec: codec to add controls to
1947 * @controls: array of controls to add
1948 * @num_controls: number of elements in the array
1950 * Return 0 for success, else error.
1952 int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
1953 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1955 return snd_soc_add_component_controls(&codec->component, controls,
1958 EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
1961 * snd_soc_add_platform_controls - add an array of controls to a platform.
1962 * Convenience function to add a list of controls.
1964 * @platform: platform to add controls to
1965 * @controls: array of controls to add
1966 * @num_controls: number of elements in the array
1968 * Return 0 for success, else error.
1970 int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
1971 const struct snd_kcontrol_new *controls, unsigned int num_controls)
1973 return snd_soc_add_component_controls(&platform->component, controls,
1976 EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);
1979 * snd_soc_add_card_controls - add an array of controls to a SoC card.
1980 * Convenience function to add a list of controls.
1982 * @soc_card: SoC card to add controls to
1983 * @controls: array of controls to add
1984 * @num_controls: number of elements in the array
1986 * Return 0 for success, else error.
1988 int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
1989 const struct snd_kcontrol_new *controls, int num_controls)
1991 struct snd_card *card = soc_card->snd_card;
1993 return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
1996 EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);
1999 * snd_soc_add_dai_controls - add an array of controls to a DAI.
2000 * Convienience function to add a list of controls.
2002 * @dai: DAI to add controls to
2003 * @controls: array of controls to add
2004 * @num_controls: number of elements in the array
2006 * Return 0 for success, else error.
2008 int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
2009 const struct snd_kcontrol_new *controls, int num_controls)
2011 struct snd_card *card = dai->component->card->snd_card;
2013 return snd_soc_add_controls(card, dai->dev, controls, num_controls,
2016 EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);
2019 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
2021 * @clk_id: DAI specific clock ID
2022 * @freq: new clock frequency in Hz
2023 * @dir: new clock direction - input/output.
2025 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
2027 int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
2028 unsigned int freq, int dir)
2030 if (dai->driver && dai->driver->ops->set_sysclk)
2031 return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2032 else if (dai->codec && dai->codec->driver->set_sysclk)
2033 return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
2038 EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);
2041 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
2043 * @clk_id: DAI specific clock ID
2044 * @source: Source for the clock
2045 * @freq: new clock frequency in Hz
2046 * @dir: new clock direction - input/output.
2048 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
2050 int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2051 int source, unsigned int freq, int dir)
2053 if (codec->driver->set_sysclk)
2054 return codec->driver->set_sysclk(codec, clk_id, source,
2059 EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);
2062 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
2064 * @div_id: DAI specific clock divider ID
2065 * @div: new clock divisor.
2067 * Configures the clock dividers. This is used to derive the best DAI bit and
2068 * frame clocks from the system or master clock. It's best to set the DAI bit
2069 * and frame clocks as low as possible to save system power.
2071 int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
2072 int div_id, int div)
2074 if (dai->driver && dai->driver->ops->set_clkdiv)
2075 return dai->driver->ops->set_clkdiv(dai, div_id, div);
2079 EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);
2082 * snd_soc_dai_set_pll - configure DAI PLL.
2084 * @pll_id: DAI specific PLL ID
2085 * @source: DAI specific source for the PLL
2086 * @freq_in: PLL input clock frequency in Hz
2087 * @freq_out: requested PLL output clock frequency in Hz
2089 * Configures and enables PLL to generate output clock based on input clock.
2091 int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
2092 unsigned int freq_in, unsigned int freq_out)
2094 if (dai->driver && dai->driver->ops->set_pll)
2095 return dai->driver->ops->set_pll(dai, pll_id, source,
2097 else if (dai->codec && dai->codec->driver->set_pll)
2098 return dai->codec->driver->set_pll(dai->codec, pll_id, source,
2103 EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);
2106 * snd_soc_codec_set_pll - configure codec PLL.
2108 * @pll_id: DAI specific PLL ID
2109 * @source: DAI specific source for the PLL
2110 * @freq_in: PLL input clock frequency in Hz
2111 * @freq_out: requested PLL output clock frequency in Hz
2113 * Configures and enables PLL to generate output clock based on input clock.
2115 int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
2116 unsigned int freq_in, unsigned int freq_out)
2118 if (codec->driver->set_pll)
2119 return codec->driver->set_pll(codec, pll_id, source,
2124 EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);
2127 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
2129 * @ratio Ratio of BCLK to Sample rate.
2131 * Configures the DAI for a preset BCLK to sample rate ratio.
2133 int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
2135 if (dai->driver && dai->driver->ops->set_bclk_ratio)
2136 return dai->driver->ops->set_bclk_ratio(dai, ratio);
2140 EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);
2143 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
2145 * @fmt: SND_SOC_DAIFMT_ format value.
2147 * Configures the DAI hardware format and clocking.
2149 int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
2151 if (dai->driver == NULL)
2153 if (dai->driver->ops->set_fmt == NULL)
2155 return dai->driver->ops->set_fmt(dai, fmt);
2157 EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);
2160 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2161 * @slots: Number of slots in use.
2162 * @tx_mask: bitmask representing active TX slots.
2163 * @rx_mask: bitmask representing active RX slots.
2165 * Generates the TDM tx and rx slot default masks for DAI.
2167 static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2168 unsigned int *tx_mask,
2169 unsigned int *rx_mask)
2171 if (*tx_mask || *rx_mask)
2177 *tx_mask = (1 << slots) - 1;
2178 *rx_mask = (1 << slots) - 1;
2184 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
2185 * @dai: The DAI to configure
2186 * @tx_mask: bitmask representing active TX slots.
2187 * @rx_mask: bitmask representing active RX slots.
2188 * @slots: Number of slots in use.
2189 * @slot_width: Width in bits for each slot.
2191 * This function configures the specified DAI for TDM operation. @slot contains
2192 * the total number of slots of the TDM stream and @slot_with the width of each
2193 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
2194 * active slots of the TDM stream for the specified DAI, i.e. which slots the
2195 * DAI should write to or read from. If a bit is set the corresponding slot is
2196 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
2197 * the first slot, bit 1 to the second slot and so on. The first active slot
2198 * maps to the first channel of the DAI, the second active slot to the second
2199 * channel and so on.
2201 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
2202 * @rx_mask and @slot_width will be ignored.
2204 * Returns 0 on success, a negative error code otherwise.
2206 int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2207 unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2209 if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
2210 dai->driver->ops->xlate_tdm_slot_mask(slots,
2211 &tx_mask, &rx_mask);
2213 snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2215 dai->tx_mask = tx_mask;
2216 dai->rx_mask = rx_mask;
2218 if (dai->driver && dai->driver->ops->set_tdm_slot)
2219 return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2224 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);
2227 * snd_soc_dai_set_channel_map - configure DAI audio channel map
2229 * @tx_num: how many TX channels
2230 * @tx_slot: pointer to an array which imply the TX slot number channel
2232 * @rx_num: how many RX channels
2233 * @rx_slot: pointer to an array which imply the RX slot number channel
2236 * configure the relationship between channel number and TDM slot number.
2238 int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
2239 unsigned int tx_num, unsigned int *tx_slot,
2240 unsigned int rx_num, unsigned int *rx_slot)
2242 if (dai->driver && dai->driver->ops->set_channel_map)
2243 return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2248 EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);
2251 * snd_soc_dai_set_tristate - configure DAI system or master clock.
2253 * @tristate: tristate enable
2255 * Tristates the DAI so that others can use it.
2257 int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
2259 if (dai->driver && dai->driver->ops->set_tristate)
2260 return dai->driver->ops->set_tristate(dai, tristate);
2264 EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);
2267 * snd_soc_dai_digital_mute - configure DAI system or master clock.
2269 * @mute: mute enable
2270 * @direction: stream to mute
2272 * Mutes the DAI DAC.
2274 int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
2280 if (dai->driver->ops->mute_stream)
2281 return dai->driver->ops->mute_stream(dai, mute, direction);
2282 else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
2283 dai->driver->ops->digital_mute)
2284 return dai->driver->ops->digital_mute(dai, mute);
2288 EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);
2290 static int snd_soc_init_multicodec(struct snd_soc_card *card,
2291 struct snd_soc_dai_link *dai_link)
2293 /* Legacy codec/codec_dai link is a single entry in multicodec */
2294 if (dai_link->codec_name || dai_link->codec_of_node ||
2295 dai_link->codec_dai_name) {
2296 dai_link->num_codecs = 1;
2298 dai_link->codecs = devm_kzalloc(card->dev,
2299 sizeof(struct snd_soc_dai_link_component),
2301 if (!dai_link->codecs)
2304 dai_link->codecs[0].name = dai_link->codec_name;
2305 dai_link->codecs[0].of_node = dai_link->codec_of_node;
2306 dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
2309 if (!dai_link->codecs) {
2310 dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
2318 * snd_soc_register_card - Register a card with the ASoC core
2320 * @card: Card to register
2323 int snd_soc_register_card(struct snd_soc_card *card)
2327 if (!card->name || !card->dev)
2330 for (i = 0; i < card->num_links; i++) {
2331 struct snd_soc_dai_link *link = &card->dai_link[i];
2333 ret = snd_soc_init_multicodec(card, link);
2335 dev_err(card->dev, "ASoC: failed to init multicodec\n");
2339 for (j = 0; j < link->num_codecs; j++) {
2341 * Codec must be specified by 1 of name or OF node,
2342 * not both or neither.
2344 if (!!link->codecs[j].name ==
2345 !!link->codecs[j].of_node) {
2346 dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
2350 /* Codec DAI name must be specified */
2351 if (!link->codecs[j].dai_name) {
2352 dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
2359 * Platform may be specified by either name or OF node, but
2360 * can be left unspecified, and a dummy platform will be used.
2362 if (link->platform_name && link->platform_of_node) {
2364 "ASoC: Both platform name/of_node are set for %s\n",
2370 * CPU device may be specified by either name or OF node, but
2371 * can be left unspecified, and will be matched based on DAI
2374 if (link->cpu_name && link->cpu_of_node) {
2376 "ASoC: Neither/both cpu name/of_node are set for %s\n",
2381 * At least one of CPU DAI name or CPU device name/node must be
2384 if (!link->cpu_dai_name &&
2385 !(link->cpu_name || link->cpu_of_node)) {
2387 "ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
2393 dev_set_drvdata(card->dev, card);
2395 snd_soc_initialize_card_lists(card);
2397 card->rtd = devm_kzalloc(card->dev,
2398 sizeof(struct snd_soc_pcm_runtime) *
2399 (card->num_links + card->num_aux_devs),
2401 if (card->rtd == NULL)
2404 card->rtd_aux = &card->rtd[card->num_links];
2406 for (i = 0; i < card->num_links; i++) {
2407 card->rtd[i].card = card;
2408 card->rtd[i].dai_link = &card->dai_link[i];
2409 card->rtd[i].codec_dais = devm_kzalloc(card->dev,
2410 sizeof(struct snd_soc_dai *) *
2411 (card->rtd[i].dai_link->num_codecs),
2413 if (card->rtd[i].codec_dais == NULL)
2417 for (i = 0; i < card->num_aux_devs; i++)
2418 card->rtd_aux[i].card = card;
2420 INIT_LIST_HEAD(&card->dapm_dirty);
2421 card->instantiated = 0;
2422 mutex_init(&card->mutex);
2423 mutex_init(&card->dapm_mutex);
2425 ret = snd_soc_instantiate_card(card);
2429 /* deactivate pins to sleep state */
2430 for (i = 0; i < card->num_rtd; i++) {
2431 struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2432 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2435 for (j = 0; j < rtd->num_codecs; j++) {
2436 struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
2437 if (!codec_dai->active)
2438 pinctrl_pm_select_sleep_state(codec_dai->dev);
2441 if (!cpu_dai->active)
2442 pinctrl_pm_select_sleep_state(cpu_dai->dev);
2447 EXPORT_SYMBOL_GPL(snd_soc_register_card);
2450 * snd_soc_unregister_card - Unregister a card with the ASoC core
2452 * @card: Card to unregister
2455 int snd_soc_unregister_card(struct snd_soc_card *card)
2457 if (card->instantiated) {
2458 card->instantiated = false;
2459 snd_soc_dapm_shutdown(card);
2460 soc_cleanup_card_resources(card);
2461 dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2466 EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
2469 * Simplify DAI link configuration by removing ".-1" from device names
2470 * and sanitizing names.
2472 static char *fmt_single_name(struct device *dev, int *id)
2474 char *found, name[NAME_SIZE];
2477 if (dev_name(dev) == NULL)
2480 strlcpy(name, dev_name(dev), NAME_SIZE);
2482 /* are we a "%s.%d" name (platform and SPI components) */
2483 found = strstr(name, dev->driver->name);
2486 if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {
2488 /* discard ID from name if ID == -1 */
2490 found[strlen(dev->driver->name)] = '\0';
2494 /* I2C component devices are named "bus-addr" */
2495 if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
2496 char tmp[NAME_SIZE];
2498 /* create unique ID number from I2C addr and bus */
2499 *id = ((id1 & 0xffff) << 16) + id2;
2501 /* sanitize component name for DAI link creation */
2502 snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2503 strlcpy(name, tmp, NAME_SIZE);
2508 return kstrdup(name, GFP_KERNEL);
2512 * Simplify DAI link naming for single devices with multiple DAIs by removing
2513 * any ".-1" and using the DAI name (instead of device name).
2515 static inline char *fmt_multiple_name(struct device *dev,
2516 struct snd_soc_dai_driver *dai_drv)
2518 if (dai_drv->name == NULL) {
2520 "ASoC: error - multiple DAI %s registered with no name\n",
2525 return kstrdup(dai_drv->name, GFP_KERNEL);
2529 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
2531 * @component: The component for which the DAIs should be unregistered
2533 static void snd_soc_unregister_dais(struct snd_soc_component *component)
2535 struct snd_soc_dai *dai, *_dai;
2537 list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2538 dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
2540 list_del(&dai->list);
2547 * snd_soc_register_dais - Register a DAI with the ASoC core
2549 * @component: The component the DAIs are registered for
2550 * @dai_drv: DAI driver to use for the DAIs
2551 * @count: Number of DAIs
2552 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
2555 static int snd_soc_register_dais(struct snd_soc_component *component,
2556 struct snd_soc_dai_driver *dai_drv, size_t count,
2557 bool legacy_dai_naming)
2559 struct device *dev = component->dev;
2560 struct snd_soc_dai *dai;
2564 dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
2566 component->dai_drv = dai_drv;
2567 component->num_dai = count;
2569 for (i = 0; i < count; i++) {
2571 dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2578 * Back in the old days when we still had component-less DAIs,
2579 * instead of having a static name, component-less DAIs would
2580 * inherit the name of the parent device so it is possible to
2581 * register multiple instances of the DAI. We still need to keep
2582 * the same naming style even though those DAIs are not
2583 * component-less anymore.
2585 if (count == 1 && legacy_dai_naming &&
2586 (dai_drv[i].id == 0 || dai_drv[i].name == NULL)) {
2587 dai->name = fmt_single_name(dev, &dai->id);
2589 dai->name = fmt_multiple_name(dev, &dai_drv[i]);
2591 dai->id = dai_drv[i].id;
2595 if (dai->name == NULL) {
2601 dai->component = component;
2603 dai->driver = &dai_drv[i];
2604 if (!dai->driver->ops)
2605 dai->driver->ops = &null_dai_ops;
2607 list_add(&dai->list, &component->dai_list);
2609 dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
2615 snd_soc_unregister_dais(component);
2620 static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
2621 enum snd_soc_dapm_type type, int subseq)
2623 struct snd_soc_component *component = dapm->component;
2625 component->driver->seq_notifier(component, type, subseq);
2628 static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
2631 struct snd_soc_component *component = dapm->component;
2633 return component->driver->stream_event(component, event);
2636 static int snd_soc_component_initialize(struct snd_soc_component *component,
2637 const struct snd_soc_component_driver *driver, struct device *dev)
2639 struct snd_soc_dapm_context *dapm;
2641 component->name = fmt_single_name(dev, &component->id);
2642 if (!component->name) {
2643 dev_err(dev, "ASoC: Failed to allocate name\n");
2647 component->dev = dev;
2648 component->driver = driver;
2649 component->probe = component->driver->probe;
2650 component->remove = component->driver->remove;
2652 if (!component->dapm_ptr)
2653 component->dapm_ptr = &component->dapm;
2655 dapm = component->dapm_ptr;
2657 dapm->component = component;
2658 dapm->bias_level = SND_SOC_BIAS_OFF;
2659 dapm->idle_bias_off = true;
2660 if (driver->seq_notifier)
2661 dapm->seq_notifier = snd_soc_component_seq_notifier;
2662 if (driver->stream_event)
2663 dapm->stream_event = snd_soc_component_stream_event;
2665 component->controls = driver->controls;
2666 component->num_controls = driver->num_controls;
2667 component->dapm_widgets = driver->dapm_widgets;
2668 component->num_dapm_widgets = driver->num_dapm_widgets;
2669 component->dapm_routes = driver->dapm_routes;
2670 component->num_dapm_routes = driver->num_dapm_routes;
2672 INIT_LIST_HEAD(&component->dai_list);
2673 mutex_init(&component->io_mutex);
2678 static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2680 int val_bytes = regmap_get_val_bytes(component->regmap);
2682 /* Errors are legitimate for non-integer byte multiples */
2684 component->val_bytes = val_bytes;
2687 #ifdef CONFIG_REGMAP
2690 * snd_soc_component_init_regmap() - Initialize regmap instance for the component
2691 * @component: The component for which to initialize the regmap instance
2692 * @regmap: The regmap instance that should be used by the component
2694 * This function allows deferred assignment of the regmap instance that is
2695 * associated with the component. Only use this if the regmap instance is not
2696 * yet ready when the component is registered. The function must also be called
2697 * before the first IO attempt of the component.
2699 void snd_soc_component_init_regmap(struct snd_soc_component *component,
2700 struct regmap *regmap)
2702 component->regmap = regmap;
2703 snd_soc_component_setup_regmap(component);
2705 EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);
2708 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
2709 * @component: The component for which to de-initialize the regmap instance
2711 * Calls regmap_exit() on the regmap instance associated to the component and
2712 * removes the regmap instance from the component.
2714 * This function should only be used if snd_soc_component_init_regmap() was used
2715 * to initialize the regmap instance.
2717 void snd_soc_component_exit_regmap(struct snd_soc_component *component)
2719 regmap_exit(component->regmap);
2720 component->regmap = NULL;
2722 EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2726 static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
2728 if (!component->write && !component->read) {
2729 if (!component->regmap)
2730 component->regmap = dev_get_regmap(component->dev, NULL);
2731 if (component->regmap)
2732 snd_soc_component_setup_regmap(component);
2735 list_add(&component->list, &component_list);
2738 static void snd_soc_component_add(struct snd_soc_component *component)
2740 mutex_lock(&client_mutex);
2741 snd_soc_component_add_unlocked(component);
2742 mutex_unlock(&client_mutex);
2745 static void snd_soc_component_cleanup(struct snd_soc_component *component)
2747 snd_soc_unregister_dais(component);
2748 kfree(component->name);
2751 static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
2753 list_del(&component->list);
2756 int snd_soc_register_component(struct device *dev,
2757 const struct snd_soc_component_driver *cmpnt_drv,
2758 struct snd_soc_dai_driver *dai_drv,
2761 struct snd_soc_component *cmpnt;
2764 cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
2766 dev_err(dev, "ASoC: Failed to allocate memory\n");
2770 ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
2774 cmpnt->ignore_pmdown_time = true;
2775 cmpnt->registered_as_component = true;
2777 ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
2779 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
2783 snd_soc_component_add(cmpnt);
2788 snd_soc_component_cleanup(cmpnt);
2793 EXPORT_SYMBOL_GPL(snd_soc_register_component);
2796 * snd_soc_unregister_component - Unregister a component from the ASoC core
2799 void snd_soc_unregister_component(struct device *dev)
2801 struct snd_soc_component *cmpnt;
2803 mutex_lock(&client_mutex);
2804 list_for_each_entry(cmpnt, &component_list, list) {
2805 if (dev == cmpnt->dev && cmpnt->registered_as_component)
2808 mutex_unlock(&client_mutex);
2812 snd_soc_component_del_unlocked(cmpnt);
2813 mutex_unlock(&client_mutex);
2814 snd_soc_component_cleanup(cmpnt);
2817 EXPORT_SYMBOL_GPL(snd_soc_unregister_component);
2819 static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
2821 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2823 return platform->driver->probe(platform);
2826 static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
2828 struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2830 platform->driver->remove(platform);
2834 * snd_soc_add_platform - Add a platform to the ASoC core
2835 * @dev: The parent device for the platform
2836 * @platform: The platform to add
2837 * @platform_driver: The driver for the platform
2839 int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
2840 const struct snd_soc_platform_driver *platform_drv)
2844 ret = snd_soc_component_initialize(&platform->component,
2845 &platform_drv->component_driver, dev);
2849 platform->dev = dev;
2850 platform->driver = platform_drv;
2852 if (platform_drv->probe)
2853 platform->component.probe = snd_soc_platform_drv_probe;
2854 if (platform_drv->remove)
2855 platform->component.remove = snd_soc_platform_drv_remove;
2857 #ifdef CONFIG_DEBUG_FS
2858 platform->component.debugfs_prefix = "platform";
2861 mutex_lock(&client_mutex);
2862 snd_soc_component_add_unlocked(&platform->component);
2863 list_add(&platform->list, &platform_list);
2864 mutex_unlock(&client_mutex);
2866 dev_dbg(dev, "ASoC: Registered platform '%s'\n",
2867 platform->component.name);
2871 EXPORT_SYMBOL_GPL(snd_soc_add_platform);
2874 * snd_soc_register_platform - Register a platform with the ASoC core
2876 * @platform: platform to register
2878 int snd_soc_register_platform(struct device *dev,
2879 const struct snd_soc_platform_driver *platform_drv)
2881 struct snd_soc_platform *platform;
2884 dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
2886 platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
2887 if (platform == NULL)
2890 ret = snd_soc_add_platform(dev, platform, platform_drv);
2896 EXPORT_SYMBOL_GPL(snd_soc_register_platform);
2899 * snd_soc_remove_platform - Remove a platform from the ASoC core
2900 * @platform: the platform to remove
2902 void snd_soc_remove_platform(struct snd_soc_platform *platform)
2905 mutex_lock(&client_mutex);
2906 list_del(&platform->list);
2907 snd_soc_component_del_unlocked(&platform->component);
2908 mutex_unlock(&client_mutex);
2910 dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
2911 platform->component.name);
2913 snd_soc_component_cleanup(&platform->component);
2915 EXPORT_SYMBOL_GPL(snd_soc_remove_platform);
2917 struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
2919 struct snd_soc_platform *platform;
2921 mutex_lock(&client_mutex);
2922 list_for_each_entry(platform, &platform_list, list) {
2923 if (dev == platform->dev) {
2924 mutex_unlock(&client_mutex);
2928 mutex_unlock(&client_mutex);
2932 EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);
2935 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
2937 * @platform: platform to unregister
2939 void snd_soc_unregister_platform(struct device *dev)
2941 struct snd_soc_platform *platform;
2943 platform = snd_soc_lookup_platform(dev);
2947 snd_soc_remove_platform(platform);
2950 EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);
2952 static u64 codec_format_map[] = {
2953 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
2954 SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
2955 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
2956 SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
2957 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
2958 SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
2959 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2960 SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
2961 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
2962 SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
2963 SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
2964 SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
2965 SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
2966 SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
2967 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
2968 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
2971 /* Fix up the DAI formats for endianness: codecs don't actually see
2972 * the endianness of the data but we're using the CPU format
2973 * definitions which do need to include endianness so we ensure that
2974 * codec DAIs always have both big and little endian variants set.
2976 static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
2980 for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
2981 if (stream->formats & codec_format_map[i])
2982 stream->formats |= codec_format_map[i];
2985 static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
2987 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2989 return codec->driver->probe(codec);
2992 static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
2994 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
2996 codec->driver->remove(codec);
2999 static int snd_soc_codec_drv_write(struct snd_soc_component *component,
3000 unsigned int reg, unsigned int val)
3002 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3004 return codec->driver->write(codec, reg, val);
3007 static int snd_soc_codec_drv_read(struct snd_soc_component *component,
3008 unsigned int reg, unsigned int *val)
3010 struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
3012 *val = codec->driver->read(codec, reg);
3017 static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
3018 enum snd_soc_bias_level level)
3020 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);
3022 return codec->driver->set_bias_level(codec, level);
3026 * snd_soc_register_codec - Register a codec with the ASoC core
3028 * @codec: codec to register
3030 int snd_soc_register_codec(struct device *dev,
3031 const struct snd_soc_codec_driver *codec_drv,
3032 struct snd_soc_dai_driver *dai_drv,
3035 struct snd_soc_codec *codec;
3036 struct snd_soc_dai *dai;
3039 dev_dbg(dev, "codec register %s\n", dev_name(dev));
3041 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
3045 codec->component.dapm_ptr = &codec->dapm;
3046 codec->component.codec = codec;
3048 ret = snd_soc_component_initialize(&codec->component,
3049 &codec_drv->component_driver, dev);
3053 if (codec_drv->controls) {
3054 codec->component.controls = codec_drv->controls;
3055 codec->component.num_controls = codec_drv->num_controls;
3057 if (codec_drv->dapm_widgets) {
3058 codec->component.dapm_widgets = codec_drv->dapm_widgets;
3059 codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
3061 if (codec_drv->dapm_routes) {
3062 codec->component.dapm_routes = codec_drv->dapm_routes;
3063 codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
3066 if (codec_drv->probe)
3067 codec->component.probe = snd_soc_codec_drv_probe;
3068 if (codec_drv->remove)
3069 codec->component.remove = snd_soc_codec_drv_remove;
3070 if (codec_drv->write)
3071 codec->component.write = snd_soc_codec_drv_write;
3072 if (codec_drv->read)
3073 codec->component.read = snd_soc_codec_drv_read;
3074 codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3075 codec->dapm.idle_bias_off = codec_drv->idle_bias_off;
3076 codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off;
3077 if (codec_drv->seq_notifier)
3078 codec->dapm.seq_notifier = codec_drv->seq_notifier;
3079 if (codec_drv->set_bias_level)
3080 codec->dapm.set_bias_level = snd_soc_codec_set_bias_level;
3082 codec->driver = codec_drv;
3083 codec->component.val_bytes = codec_drv->reg_word_size;
3085 #ifdef CONFIG_DEBUG_FS
3086 codec->component.init_debugfs = soc_init_codec_debugfs;
3087 codec->component.debugfs_prefix = "codec";
3090 if (codec_drv->get_regmap)
3091 codec->component.regmap = codec_drv->get_regmap(dev);
3093 for (i = 0; i < num_dai; i++) {
3094 fixup_codec_formats(&dai_drv[i].playback);
3095 fixup_codec_formats(&dai_drv[i].capture);
3098 ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3100 dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3104 list_for_each_entry(dai, &codec->component.dai_list, list)
3107 mutex_lock(&client_mutex);
3108 snd_soc_component_add_unlocked(&codec->component);
3109 list_add(&codec->list, &codec_list);
3110 mutex_unlock(&client_mutex);
3112 dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
3113 codec->component.name);
3117 snd_soc_component_cleanup(&codec->component);
3122 EXPORT_SYMBOL_GPL(snd_soc_register_codec);
3125 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
3127 * @codec: codec to unregister
3129 void snd_soc_unregister_codec(struct device *dev)
3131 struct snd_soc_codec *codec;
3133 mutex_lock(&client_mutex);
3134 list_for_each_entry(codec, &codec_list, list) {
3135 if (dev == codec->dev)
3138 mutex_unlock(&client_mutex);
3142 list_del(&codec->list);
3143 snd_soc_component_del_unlocked(&codec->component);
3144 mutex_unlock(&client_mutex);
3146 dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
3147 codec->component.name);
3149 snd_soc_component_cleanup(&codec->component);
3150 snd_soc_cache_exit(codec);
3153 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
3155 /* Retrieve a card's name from device tree */
3156 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
3157 const char *propname)
3159 struct device_node *np;
3163 pr_err("card->dev is not set before calling %s\n", __func__);
3167 np = card->dev->of_node;
3169 ret = of_property_read_string_index(np, propname, 0, &card->name);
3171 * EINVAL means the property does not exist. This is fine providing
3172 * card->name was previously set, which is checked later in
3173 * snd_soc_register_card.
3175 if (ret < 0 && ret != -EINVAL) {
3177 "ASoC: Property '%s' could not be read: %d\n",
3184 EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
3186 static const struct snd_soc_dapm_widget simple_widgets[] = {
3187 SND_SOC_DAPM_MIC("Microphone", NULL),
3188 SND_SOC_DAPM_LINE("Line", NULL),
3189 SND_SOC_DAPM_HP("Headphone", NULL),
3190 SND_SOC_DAPM_SPK("Speaker", NULL),
3193 int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3194 const char *propname)
3196 struct device_node *np = card->dev->of_node;
3197 struct snd_soc_dapm_widget *widgets;
3198 const char *template, *wname;
3199 int i, j, num_widgets, ret;
3201 num_widgets = of_property_count_strings(np, propname);
3202 if (num_widgets < 0) {
3204 "ASoC: Property '%s' does not exist\n", propname);
3207 if (num_widgets & 1) {
3209 "ASoC: Property '%s' length is not even\n", propname);
3215 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3220 widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
3224 "ASoC: Could not allocate memory for widgets\n");
3228 for (i = 0; i < num_widgets; i++) {
3229 ret = of_property_read_string_index(np, propname,
3233 "ASoC: Property '%s' index %d read error:%d\n",
3234 propname, 2 * i, ret);
3238 for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
3239 if (!strncmp(template, simple_widgets[j].name,
3240 strlen(simple_widgets[j].name))) {
3241 widgets[i] = simple_widgets[j];
3246 if (j >= ARRAY_SIZE(simple_widgets)) {
3248 "ASoC: DAPM widget '%s' is not supported\n",
3253 ret = of_property_read_string_index(np, propname,
3258 "ASoC: Property '%s' index %d read error:%d\n",
3259 propname, (2 * i) + 1, ret);
3263 widgets[i].name = wname;
3266 card->of_dapm_widgets = widgets;
3267 card->num_of_dapm_widgets = num_widgets;
3271 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3273 int snd_soc_of_parse_tdm_slot(struct device_node *np,
3274 unsigned int *slots,
3275 unsigned int *slot_width)
3280 if (of_property_read_bool(np, "dai-tdm-slot-num")) {
3281 ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
3289 if (of_property_read_bool(np, "dai-tdm-slot-width")) {
3290 ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
3300 EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);
3302 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3303 const char *propname)
3305 struct device_node *np = card->dev->of_node;
3307 struct snd_soc_dapm_route *routes;
3310 num_routes = of_property_count_strings(np, propname);
3311 if (num_routes < 0 || num_routes & 1) {
3313 "ASoC: Property '%s' does not exist or its length is not even\n",
3319 dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3324 routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3328 "ASoC: Could not allocate DAPM route table\n");
3332 for (i = 0; i < num_routes; i++) {
3333 ret = of_property_read_string_index(np, propname,
3334 2 * i, &routes[i].sink);
3337 "ASoC: Property '%s' index %d could not be read: %d\n",
3338 propname, 2 * i, ret);
3341 ret = of_property_read_string_index(np, propname,
3342 (2 * i) + 1, &routes[i].source);
3345 "ASoC: Property '%s' index %d could not be read: %d\n",
3346 propname, (2 * i) + 1, ret);
3351 card->num_of_dapm_routes = num_routes;
3352 card->of_dapm_routes = routes;
3356 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3358 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3360 struct device_node **bitclkmaster,
3361 struct device_node **framemaster)
3365 unsigned int format = 0;
3371 } of_fmt_table[] = {
3372 { "i2s", SND_SOC_DAIFMT_I2S },
3373 { "right_j", SND_SOC_DAIFMT_RIGHT_J },
3374 { "left_j", SND_SOC_DAIFMT_LEFT_J },
3375 { "dsp_a", SND_SOC_DAIFMT_DSP_A },
3376 { "dsp_b", SND_SOC_DAIFMT_DSP_B },
3377 { "ac97", SND_SOC_DAIFMT_AC97 },
3378 { "pdm", SND_SOC_DAIFMT_PDM},
3379 { "msb", SND_SOC_DAIFMT_MSB },
3380 { "lsb", SND_SOC_DAIFMT_LSB },
3387 * check "[prefix]format = xxx"
3388 * SND_SOC_DAIFMT_FORMAT_MASK area
3390 snprintf(prop, sizeof(prop), "%sformat", prefix);
3391 ret = of_property_read_string(np, prop, &str);
3393 for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
3394 if (strcmp(str, of_fmt_table[i].name) == 0) {
3395 format |= of_fmt_table[i].val;
3402 * check "[prefix]continuous-clock"
3403 * SND_SOC_DAIFMT_CLOCK_MASK area
3405 snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
3406 if (of_get_property(np, prop, NULL))
3407 format |= SND_SOC_DAIFMT_CONT;
3409 format |= SND_SOC_DAIFMT_GATED;
3412 * check "[prefix]bitclock-inversion"
3413 * check "[prefix]frame-inversion"
3414 * SND_SOC_DAIFMT_INV_MASK area
3416 snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
3417 bit = !!of_get_property(np, prop, NULL);
3419 snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
3420 frame = !!of_get_property(np, prop, NULL);
3422 switch ((bit << 4) + frame) {
3424 format |= SND_SOC_DAIFMT_IB_IF;
3427 format |= SND_SOC_DAIFMT_IB_NF;
3430 format |= SND_SOC_DAIFMT_NB_IF;
3433 /* SND_SOC_DAIFMT_NB_NF is default */
3438 * check "[prefix]bitclock-master"
3439 * check "[prefix]frame-master"
3440 * SND_SOC_DAIFMT_MASTER_MASK area
3442 snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
3443 bit = !!of_get_property(np, prop, NULL);
3444 if (bit && bitclkmaster)
3445 *bitclkmaster = of_parse_phandle(np, prop, 0);
3447 snprintf(prop, sizeof(prop), "%sframe-master", prefix);
3448 frame = !!of_get_property(np, prop, NULL);
3449 if (frame && framemaster)
3450 *framemaster = of_parse_phandle(np, prop, 0);
3452 switch ((bit << 4) + frame) {
3454 format |= SND_SOC_DAIFMT_CBM_CFM;
3457 format |= SND_SOC_DAIFMT_CBM_CFS;
3460 format |= SND_SOC_DAIFMT_CBS_CFM;
3463 format |= SND_SOC_DAIFMT_CBS_CFS;
3469 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
3471 static int snd_soc_get_dai_name(struct of_phandle_args *args,
3472 const char **dai_name)
3474 struct snd_soc_component *pos;
3475 struct device_node *component_of_node;
3476 int ret = -EPROBE_DEFER;
3478 mutex_lock(&client_mutex);
3479 list_for_each_entry(pos, &component_list, list) {
3480 component_of_node = pos->dev->of_node;
3481 if (!component_of_node && pos->dev->parent)
3482 component_of_node = pos->dev->parent->of_node;
3484 if (component_of_node != args->np)
3487 if (pos->driver->of_xlate_dai_name) {
3488 ret = pos->driver->of_xlate_dai_name(pos,
3494 switch (args->args_count) {
3496 id = 0; /* same as dai_drv[0] */
3506 if (id < 0 || id >= pos->num_dai) {
3513 *dai_name = pos->dai_drv[id].name;
3515 *dai_name = pos->name;
3520 mutex_unlock(&client_mutex);
3524 int snd_soc_of_get_dai_name(struct device_node *of_node,
3525 const char **dai_name)
3527 struct of_phandle_args args;
3530 ret = of_parse_phandle_with_args(of_node, "sound-dai",
3531 "#sound-dai-cells", 0, &args);
3535 ret = snd_soc_get_dai_name(&args, dai_name);
3537 of_node_put(args.np);
3541 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);
3544 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
3546 * @of_node: Device node
3547 * @dai_link: DAI link
3549 * Builds an array of CODEC DAI components from the DAI link property
3551 * The array is set in the DAI link and the number of DAIs is set accordingly.
3552 * The device nodes in the array (of_node) must be dereferenced by the caller.
3554 * Returns 0 for success
3556 int snd_soc_of_get_dai_link_codecs(struct device *dev,
3557 struct device_node *of_node,
3558 struct snd_soc_dai_link *dai_link)
3560 struct of_phandle_args args;
3561 struct snd_soc_dai_link_component *component;
3563 int index, num_codecs, ret;
3565 /* Count the number of CODECs */
3567 num_codecs = of_count_phandle_with_args(of_node, name,
3568 "#sound-dai-cells");
3569 if (num_codecs <= 0) {
3570 if (num_codecs == -ENOENT)
3571 dev_err(dev, "No 'sound-dai' property\n");
3573 dev_err(dev, "Bad phandle in 'sound-dai'\n");
3576 component = devm_kzalloc(dev,
3577 sizeof *component * num_codecs,
3581 dai_link->codecs = component;
3582 dai_link->num_codecs = num_codecs;
3584 /* Parse the list */
3585 for (index = 0, component = dai_link->codecs;
3586 index < dai_link->num_codecs;
3587 index++, component++) {
3588 ret = of_parse_phandle_with_args(of_node, name,
3593 component->of_node = args.np;
3594 ret = snd_soc_get_dai_name(&args, &component->dai_name);
3600 for (index = 0, component = dai_link->codecs;
3601 index < dai_link->num_codecs;
3602 index++, component++) {
3603 if (!component->of_node)
3605 of_node_put(component->of_node);
3606 component->of_node = NULL;
3608 dai_link->codecs = NULL;
3609 dai_link->num_codecs = 0;
3612 EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);
3614 static int __init snd_soc_init(void)
3616 snd_soc_debugfs_init();
3617 snd_soc_util_init();
3619 return platform_driver_register(&soc_driver);
3621 module_init(snd_soc_init);
3623 static void __exit snd_soc_exit(void)
3625 snd_soc_util_exit();
3626 snd_soc_debugfs_exit();
3628 #ifdef CONFIG_DEBUG_FS
3630 platform_driver_unregister(&soc_driver);
3632 module_exit(snd_soc_exit);
3634 /* Module information */
3635 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
3636 MODULE_DESCRIPTION("ALSA SoC Core");
3637 MODULE_LICENSE("GPL");
3638 MODULE_ALIAS("platform:soc-audio");