soc-core.c 85.4 KB
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// SPDX-License-Identifier: GPL-2.0+
//
// soc-core.c  --  ALSA SoC Audio Layer
//
// Copyright 2005 Wolfson Microelectronics PLC.
// Copyright 2005 Openedhand Ltd.
// Copyright (C) 2010 Slimlogic Ltd.
// Copyright (C) 2010 Texas Instruments Inc.
//
// Author: Liam Girdwood <lrg@slimlogic.co.uk>
//         with code, comments and ideas from :-
//         Richard Purdie <richard@openedhand.com>
//
//  TODO:
//   o Add hw rules to enforce rates, etc.
//   o More testing with other codecs/machines.
//   o Add more codecs and platforms to ensure good API coverage.
//   o Support TDM on PCM and I2S
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#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/bitops.h>
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#include <linux/debugfs.h>
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#include <linux/platform_device.h>
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#include <linux/pinctrl/consumer.h>
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#include <linux/ctype.h>
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#include <linux/slab.h>
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#include <linux/of.h>
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#include <linux/of_graph.h>
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#include <linux/dmi.h>
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#include <sound/core.h>
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#include <sound/jack.h>
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#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
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#include <sound/soc-dpcm.h>
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#include <sound/soc-topology.h>
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#include <sound/initval.h>

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#define CREATE_TRACE_POINTS
#include <trace/events/asoc.h>

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#define NAME_SIZE	32

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#ifdef CONFIG_DEBUG_FS
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struct dentry *snd_soc_debugfs_root;
EXPORT_SYMBOL_GPL(snd_soc_debugfs_root);
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#endif

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static DEFINE_MUTEX(client_mutex);
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static LIST_HEAD(component_list);
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static LIST_HEAD(unbind_card_list);
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#define for_each_component(component)			\
	list_for_each_entry(component, &component_list, list)

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/*
 * This is used if driver don't need to have CPU/Codec/Platform
 * dai_link. see soc.h
 */
struct snd_soc_dai_link_component null_dailink_component[0];
EXPORT_SYMBOL_GPL(null_dailink_component);

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/*
 * This is a timeout to do a DAPM powerdown after a stream is closed().
 * It can be used to eliminate pops between different playback streams, e.g.
 * between two audio tracks.
 */
static int pmdown_time = 5000;
module_param(pmdown_time, int, 0);
MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");

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/*
 * If a DMI filed contain strings in this blacklist (e.g.
 * "Type2 - Board Manufacturer" or "Type1 - TBD by OEM"), it will be taken
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 * as invalid and dropped when setting the card long name from DMI info.
 */
static const char * const dmi_blacklist[] = {
	"To be filled by OEM",
	"TBD by OEM",
	"Default String",
	"Board Manufacturer",
	"Board Vendor Name",
	"Board Product Name",
	NULL,	/* terminator */
};

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static ssize_t pmdown_time_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{
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	struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
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	return sprintf(buf, "%ld\n", rtd->pmdown_time);
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}

static ssize_t pmdown_time_set(struct device *dev,
			       struct device_attribute *attr,
			       const char *buf, size_t count)
{
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	struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
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	int ret;
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	ret = kstrtol(buf, 10, &rtd->pmdown_time);
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	if (ret)
		return ret;
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	return count;
}

static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);

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static struct attribute *soc_dev_attrs[] = {
	&dev_attr_pmdown_time.attr,
	NULL
};

static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
				       struct attribute *attr, int idx)
{
	struct device *dev = kobj_to_dev(kobj);
	struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);

	if (attr == &dev_attr_pmdown_time.attr)
		return attr->mode; /* always visible */
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	return rtd->num_codecs ? attr->mode : 0; /* enabled only with codec */
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}

static const struct attribute_group soc_dapm_dev_group = {
	.attrs = soc_dapm_dev_attrs,
	.is_visible = soc_dev_attr_is_visible,
};

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static const struct attribute_group soc_dev_group = {
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	.attrs = soc_dev_attrs,
	.is_visible = soc_dev_attr_is_visible,
};

static const struct attribute_group *soc_dev_attr_groups[] = {
	&soc_dapm_dev_group,
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	&soc_dev_group,
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	NULL
};

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#ifdef CONFIG_DEBUG_FS
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static void soc_init_component_debugfs(struct snd_soc_component *component)
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{
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	if (!component->card->debugfs_card_root)
		return;

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	if (component->debugfs_prefix) {
		char *name;
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		name = kasprintf(GFP_KERNEL, "%s:%s",
			component->debugfs_prefix, component->name);
		if (name) {
			component->debugfs_root = debugfs_create_dir(name,
				component->card->debugfs_card_root);
			kfree(name);
		}
	} else {
		component->debugfs_root = debugfs_create_dir(component->name,
				component->card->debugfs_card_root);
	}
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	snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
		component->debugfs_root);
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}

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static void soc_cleanup_component_debugfs(struct snd_soc_component *component)
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{
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	debugfs_remove_recursive(component->debugfs_root);
}
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static int dai_list_show(struct seq_file *m, void *v)
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{
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	struct snd_soc_component *component;
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	struct snd_soc_dai *dai;

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	mutex_lock(&client_mutex);

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	for_each_component(component)
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		for_each_component_dais(component, dai)
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			seq_printf(m, "%s\n", dai->name);
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	mutex_unlock(&client_mutex);

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	return 0;
}
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DEFINE_SHOW_ATTRIBUTE(dai_list);
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static int component_list_show(struct seq_file *m, void *v)
{
	struct snd_soc_component *component;

	mutex_lock(&client_mutex);

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	for_each_component(component)
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		seq_printf(m, "%s\n", component->name);

	mutex_unlock(&client_mutex);

	return 0;
}
DEFINE_SHOW_ATTRIBUTE(component_list);

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static void soc_init_card_debugfs(struct snd_soc_card *card)
{
	card->debugfs_card_root = debugfs_create_dir(card->name,
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						     snd_soc_debugfs_root);
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	debugfs_create_u32("dapm_pop_time", 0644, card->debugfs_card_root,
			   &card->pop_time);
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}

static void soc_cleanup_card_debugfs(struct snd_soc_card *card)
{
	debugfs_remove_recursive(card->debugfs_card_root);
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	card->debugfs_card_root = NULL;
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}

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static void snd_soc_debugfs_init(void)
{
	snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);

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	debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
			    &dai_list_fops);
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	debugfs_create_file("components", 0444, snd_soc_debugfs_root, NULL,
			    &component_list_fops);
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}

static void snd_soc_debugfs_exit(void)
{
	debugfs_remove_recursive(snd_soc_debugfs_root);
}

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#else

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static inline void soc_init_component_debugfs(
	struct snd_soc_component *component)
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{
}

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static inline void soc_cleanup_component_debugfs(
	struct snd_soc_component *component)
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{
}

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static inline void soc_init_card_debugfs(struct snd_soc_card *card)
{
}

static inline void soc_cleanup_card_debugfs(struct snd_soc_card *card)
{
}
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static inline void snd_soc_debugfs_init(void)
{
}

static inline void snd_soc_debugfs_exit(void)
{
}

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#endif

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static int snd_soc_rtdcom_add(struct snd_soc_pcm_runtime *rtd,
			      struct snd_soc_component *component)
{
	struct snd_soc_rtdcom_list *rtdcom;
	struct snd_soc_rtdcom_list *new_rtdcom;

	for_each_rtdcom(rtd, rtdcom) {
		/* already connected */
		if (rtdcom->component == component)
			return 0;
	}

	new_rtdcom = kmalloc(sizeof(*new_rtdcom), GFP_KERNEL);
	if (!new_rtdcom)
		return -ENOMEM;

	new_rtdcom->component = component;
	INIT_LIST_HEAD(&new_rtdcom->list);

	list_add_tail(&new_rtdcom->list, &rtd->component_list);

	return 0;
}

static void snd_soc_rtdcom_del_all(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_soc_rtdcom_list *rtdcom1, *rtdcom2;

	for_each_rtdcom_safe(rtd, rtdcom1, rtdcom2)
		kfree(rtdcom1);

	INIT_LIST_HEAD(&rtd->component_list);
}

struct snd_soc_component *snd_soc_rtdcom_lookup(struct snd_soc_pcm_runtime *rtd,
						const char *driver_name)
{
	struct snd_soc_rtdcom_list *rtdcom;

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	if (!driver_name)
		return NULL;

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	for_each_rtdcom(rtd, rtdcom) {
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		const char *component_name = rtdcom->component->driver->name;

		if (!component_name)
			continue;

		if ((component_name == driver_name) ||
		    strcmp(component_name, driver_name) == 0)
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			return rtdcom->component;
	}

	return NULL;
}
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EXPORT_SYMBOL_GPL(snd_soc_rtdcom_lookup);
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struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
		const char *dai_link, int stream)
{
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	struct snd_soc_pcm_runtime *rtd;
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	for_each_card_rtds(card, rtd) {
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		if (rtd->dai_link->no_pcm &&
			!strcmp(rtd->dai_link->name, dai_link))
			return rtd->pcm->streams[stream].substream;
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	}
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	dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
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	return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);

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static const struct snd_soc_ops null_snd_soc_ops;

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static struct snd_soc_pcm_runtime *soc_new_pcm_runtime(
	struct snd_soc_card *card, struct snd_soc_dai_link *dai_link)
{
	struct snd_soc_pcm_runtime *rtd;

	rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
	if (!rtd)
		return NULL;

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	INIT_LIST_HEAD(&rtd->component_list);
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	rtd->card = card;
	rtd->dai_link = dai_link;
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	if (!rtd->dai_link->ops)
		rtd->dai_link->ops = &null_snd_soc_ops;

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	rtd->codec_dais = kcalloc(dai_link->num_codecs,
					sizeof(struct snd_soc_dai *),
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					GFP_KERNEL);
	if (!rtd->codec_dais) {
		kfree(rtd);
		return NULL;
	}

	return rtd;
}

static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
{
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	kfree(rtd->codec_dais);
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	snd_soc_rtdcom_del_all(rtd);
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	kfree(rtd);
}

static void soc_add_pcm_runtime(struct snd_soc_card *card,
		struct snd_soc_pcm_runtime *rtd)
{
	list_add_tail(&rtd->list, &card->rtd_list);
	rtd->num = card->num_rtd;
	card->num_rtd++;
}

static void soc_remove_pcm_runtimes(struct snd_soc_card *card)
{
	struct snd_soc_pcm_runtime *rtd, *_rtd;

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	for_each_card_rtds_safe(card, rtd, _rtd) {
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		list_del(&rtd->list);
		soc_free_pcm_runtime(rtd);
	}

	card->num_rtd = 0;
}

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struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
		const char *dai_link)
{
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	struct snd_soc_pcm_runtime *rtd;
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	for_each_card_rtds(card, rtd) {
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		if (!strcmp(rtd->dai_link->name, dai_link))
			return rtd;
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	}
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	dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
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	return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);

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static void snd_soc_flush_all_delayed_work(struct snd_soc_card *card)
{
	struct snd_soc_pcm_runtime *rtd;

	for_each_card_rtds(card, rtd)
		flush_delayed_work(&rtd->delayed_work);
}

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#ifdef CONFIG_PM_SLEEP
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/* powers down audio subsystem for suspend */
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int snd_soc_suspend(struct device *dev)
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{
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	struct snd_soc_card *card = dev_get_drvdata(dev);
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	struct snd_soc_component *component;
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	struct snd_soc_pcm_runtime *rtd;
	int i;
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	/* If the card is not initialized yet there is nothing to do */
	if (!card->instantiated)
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		return 0;

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	/*
	 * Due to the resume being scheduled into a workqueue we could
	 * suspend before that's finished - wait for it to complete.
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	 */
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	snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
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	/* we're going to block userspace touching us until resume completes */
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	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
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	/* mute any active DACs */
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	for_each_card_rtds(card, rtd) {
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		struct snd_soc_dai *dai;
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		if (rtd->dai_link->ignore_suspend)
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			continue;

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		for_each_rtd_codec_dai(rtd, i, dai) {
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			if (dai->playback_active)
				snd_soc_dai_digital_mute(dai, 1,
						SNDRV_PCM_STREAM_PLAYBACK);
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		}
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	}

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	/* suspend all pcms */
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	for_each_card_rtds(card, rtd) {
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		if (rtd->dai_link->ignore_suspend)
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			continue;

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		snd_pcm_suspend_all(rtd->pcm);
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	}
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	if (card->suspend_pre)
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		card->suspend_pre(card);
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	for_each_card_rtds(card, rtd) {
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		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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		if (rtd->dai_link->ignore_suspend)
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			continue;

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		if (!cpu_dai->driver->bus_control)
			snd_soc_dai_suspend(cpu_dai);
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	}

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	/* close any waiting streams */
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	snd_soc_flush_all_delayed_work(card);
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	for_each_card_rtds(card, rtd) {
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		if (rtd->dai_link->ignore_suspend)
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			continue;

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		snd_soc_dapm_stream_event(rtd,
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					  SNDRV_PCM_STREAM_PLAYBACK,
					  SND_SOC_DAPM_STREAM_SUSPEND);
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		snd_soc_dapm_stream_event(rtd,
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					  SNDRV_PCM_STREAM_CAPTURE,
					  SND_SOC_DAPM_STREAM_SUSPEND);
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	}

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	/* Recheck all endpoints too, their state is affected by suspend */
	dapm_mark_endpoints_dirty(card);
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	snd_soc_dapm_sync(&card->dapm);

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	/* suspend all COMPONENTs */
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	for_each_card_components(card, component) {
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		struct snd_soc_dapm_context *dapm =
				snd_soc_component_get_dapm(component);
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		/*
		 * If there are paths active then the COMPONENT will be held
		 * with bias _ON and should not be suspended.
		 */
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		if (!component->suspended) {
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			switch (snd_soc_dapm_get_bias_level(dapm)) {
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			case SND_SOC_BIAS_STANDBY:
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				/*
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				 * If the COMPONENT is capable of idle
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				 * bias off then being in STANDBY
				 * means it's doing something,
				 * otherwise fall through.
				 */
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				if (dapm->idle_bias_off) {
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					dev_dbg(component->dev,
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						"ASoC: idle_bias_off CODEC on over suspend\n");
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					break;
				}
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				/* fall through */
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			case SND_SOC_BIAS_OFF:
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				if (component->driver->suspend)
					component->driver->suspend(component);
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				component->suspended = 1;
				if (component->regmap)
					regcache_mark_dirty(component->regmap);
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				/* deactivate pins to sleep state */
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				pinctrl_pm_select_sleep_state(component->dev);
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				break;
			default:
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				dev_dbg(component->dev,
					"ASoC: COMPONENT is on over suspend\n");
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				break;
			}
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		}
	}
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	for_each_card_rtds(card, rtd) {
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		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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		if (rtd->dai_link->ignore_suspend)
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			continue;

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		if (cpu_dai->driver->bus_control)
			snd_soc_dai_suspend(cpu_dai);
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		/* deactivate pins to sleep state */
		pinctrl_pm_select_sleep_state(cpu_dai->dev);
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	}

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	if (card->suspend_post)
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		card->suspend_post(card);
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	return 0;
}
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EXPORT_SYMBOL_GPL(snd_soc_suspend);
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/*
 * deferred resume work, so resume can complete before we finished
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 * setting our codec back up, which can be very slow on I2C
 */
static void soc_resume_deferred(struct work_struct *work)
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{
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	struct snd_soc_card *card =
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			container_of(work, struct snd_soc_card,
				     deferred_resume_work);
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	struct snd_soc_pcm_runtime *rtd;
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	struct snd_soc_component *component;
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	int i;
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	/*
	 * our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
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	 * so userspace apps are blocked from touching us
	 */

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	dev_dbg(card->dev, "ASoC: starting resume work\n");
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	/* Bring us up into D2 so that DAPM starts enabling things */
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	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
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	if (card->resume_pre)
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		card->resume_pre(card);
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	/* resume control bus DAIs */
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	for_each_card_rtds(card, rtd) {
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		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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		if (rtd->dai_link->ignore_suspend)
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			continue;

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		if (cpu_dai->driver->bus_control)
			snd_soc_dai_resume(cpu_dai);
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	}

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	for_each_card_components(card, component) {
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		if (component->suspended) {
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			if (component->driver->resume)
				component->driver->resume(component);
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			component->suspended = 0;
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		}
	}
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	for_each_card_rtds(card, rtd) {
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		if (rtd->dai_link->ignore_suspend)
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			continue;

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		snd_soc_dapm_stream_event(rtd,
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					  SNDRV_PCM_STREAM_PLAYBACK,
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					  SND_SOC_DAPM_STREAM_RESUME);
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		snd_soc_dapm_stream_event(rtd,
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					  SNDRV_PCM_STREAM_CAPTURE,
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					  SND_SOC_DAPM_STREAM_RESUME);
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	}

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	/* unmute any active DACs */
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	for_each_card_rtds(card, rtd) {
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		struct snd_soc_dai *dai;
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		if (rtd->dai_link->ignore_suspend)
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			continue;

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		for_each_rtd_codec_dai(rtd, i, dai) {
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			if (dai->playback_active)
				snd_soc_dai_digital_mute(dai, 0,
						SNDRV_PCM_STREAM_PLAYBACK);
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		}
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	}

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	for_each_card_rtds(card, rtd) {
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		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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		if (rtd->dai_link->ignore_suspend)
636 637
			continue;

638 639
		if (!cpu_dai->driver->bus_control)
			snd_soc_dai_resume(cpu_dai);
F
Frank Mandarino 已提交
640 641
	}

642
	if (card->resume_post)
643
		card->resume_post(card);
F
Frank Mandarino 已提交
644

645
	dev_dbg(card->dev, "ASoC: resume work completed\n");
646

647 648
	/* Recheck all endpoints too, their state is affected by suspend */
	dapm_mark_endpoints_dirty(card);
649
	snd_soc_dapm_sync(&card->dapm);
650 651 652

	/* userspace can access us now we are back as we were before */
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
653 654 655
}

/* powers up audio subsystem after a suspend */
656
int snd_soc_resume(struct device *dev)
657
{
658
	struct snd_soc_card *card = dev_get_drvdata(dev);
659
	bool bus_control = false;
660
	struct snd_soc_pcm_runtime *rtd;
661 662
	struct snd_soc_dai *codec_dai;
	int i;
663

664 665
	/* If the card is not initialized yet there is nothing to do */
	if (!card->instantiated)
666 667
		return 0;

668
	/* activate pins from sleep state */
669
	for_each_card_rtds(card, rtd) {
670 671
		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;

672 673
		if (cpu_dai->active)
			pinctrl_pm_select_default_state(cpu_dai->dev);
674

675
		for_each_rtd_codec_dai(rtd, i, codec_dai) {
676 677 678
			if (codec_dai->active)
				pinctrl_pm_select_default_state(codec_dai->dev);
		}
679 680
	}

681 682 683 684
	/*
	 * DAIs that also act as the control bus master might have other drivers
	 * hanging off them so need to resume immediately. Other drivers don't
	 * have that problem and may take a substantial amount of time to resume
685 686
	 * due to I/O costs and anti-pop so handle them out of line.
	 */
687
	for_each_card_rtds(card, rtd) {
688
		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
689

690
		bus_control |= cpu_dai->driver->bus_control;
691
	}
692 693
	if (bus_control) {
		dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
694 695
		soc_resume_deferred(&card->deferred_resume_work);
	} else {
696
		dev_dbg(dev, "ASoC: Scheduling resume work\n");
697
		if (!schedule_work(&card->deferred_resume_work))
698
			dev_err(dev, "ASoC: resume work item may be lost\n");
699
	}
700

F
Frank Mandarino 已提交
701 702
	return 0;
}
703
EXPORT_SYMBOL_GPL(snd_soc_resume);
F
Frank Mandarino 已提交
704
#else
705 706
#define snd_soc_suspend NULL
#define snd_soc_resume NULL
F
Frank Mandarino 已提交
707 708
#endif

709
static const struct snd_soc_dai_ops null_dai_ops = {
710 711
};

712 713
static struct device_node
*soc_component_to_node(struct snd_soc_component *component)
714
{
715
	struct device_node *of_node;
716

717 718 719
	of_node = component->dev->of_node;
	if (!of_node && component->dev->parent)
		of_node = component->dev->parent->of_node;
720

721
	return of_node;
722 723
}

724 725 726 727 728 729
static int snd_soc_is_matching_component(
	const struct snd_soc_dai_link_component *dlc,
	struct snd_soc_component *component)
{
	struct device_node *component_of_node;

730 731 732 733
	if (!dlc)
		return 0;

	component_of_node = soc_component_to_node(component);
734 735 736 737 738 739 740 741 742

	if (dlc->of_node && component_of_node != dlc->of_node)
		return 0;
	if (dlc->name && strcmp(component->name, dlc->name))
		return 0;

	return 1;
}

743
static struct snd_soc_component *soc_find_component(
744
	const struct snd_soc_dai_link_component *dlc)
745
{
746
	struct snd_soc_component *component;
747

748 749
	lockdep_assert_held(&client_mutex);

750 751 752 753 754 755 756 757
	/*
	 * NOTE
	 *
	 * It returns *1st* found component, but some driver
	 * has few components by same of_node/name
	 * ex)
	 *	CPU component and generic DMAEngine component
	 */
758 759
	for_each_component(component)
		if (snd_soc_is_matching_component(dlc, component))
760
			return component;
761 762 763 764

	return NULL;
}

765 766 767
/**
 * snd_soc_find_dai - Find a registered DAI
 *
768
 * @dlc: name of the DAI or the DAI driver and optional component info to match
769
 *
770
 * This function will search all registered components and their DAIs to
771 772 773 774 775
 * find the DAI of the same name. The component's of_node and name
 * should also match if being specified.
 *
 * Return: pointer of DAI, or NULL if not found.
 */
M
Mengdong Lin 已提交
776
struct snd_soc_dai *snd_soc_find_dai(
777
	const struct snd_soc_dai_link_component *dlc)
778
{
779 780
	struct snd_soc_component *component;
	struct snd_soc_dai *dai;
781

782 783
	lockdep_assert_held(&client_mutex);

784
	/* Find CPU DAI from registered DAIs */
785
	for_each_component(component) {
786
		if (!snd_soc_is_matching_component(dlc, component))
787
			continue;
788
		for_each_component_dais(component, dai) {
789
			if (dlc->dai_name && strcmp(dai->name, dlc->dai_name)
790 791
			    && (!dai->driver->name
				|| strcmp(dai->driver->name, dlc->dai_name)))
792 793
				continue;

794
			return dai;
795 796 797 798 799
		}
	}

	return NULL;
}
M
Mengdong Lin 已提交
800
EXPORT_SYMBOL_GPL(snd_soc_find_dai);
801

M
Mengdong Lin 已提交
802 803 804 805 806 807
/**
 * snd_soc_find_dai_link - Find a DAI link
 *
 * @card: soc card
 * @id: DAI link ID to match
 * @name: DAI link name to match, optional
808
 * @stream_name: DAI link stream name to match, optional
M
Mengdong Lin 已提交
809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824
 *
 * This function will search all existing DAI links of the soc card to
 * find the link of the same ID. Since DAI links may not have their
 * unique ID, so name and stream name should also match if being
 * specified.
 *
 * Return: pointer of DAI link, or NULL if not found.
 */
struct snd_soc_dai_link *snd_soc_find_dai_link(struct snd_soc_card *card,
					       int id, const char *name,
					       const char *stream_name)
{
	struct snd_soc_dai_link *link, *_link;

	lockdep_assert_held(&client_mutex);

825
	for_each_card_links_safe(card, link, _link) {
M
Mengdong Lin 已提交
826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842
		if (link->id != id)
			continue;

		if (name && (!link->name || strcmp(name, link->name)))
			continue;

		if (stream_name && (!link->stream_name
			|| strcmp(stream_name, link->stream_name)))
			continue;

		return link;
	}

	return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_find_dai_link);

843 844 845 846 847
static bool soc_is_dai_link_bound(struct snd_soc_card *card,
		struct snd_soc_dai_link *dai_link)
{
	struct snd_soc_pcm_runtime *rtd;

848
	for_each_card_rtds(card, rtd) {
849 850 851 852 853 854 855
		if (rtd->dai_link == dai_link)
			return true;
	}

	return false;
}

856 857
static int soc_bind_dai_link(struct snd_soc_card *card,
	struct snd_soc_dai_link *dai_link)
F
Frank Mandarino 已提交
858
{
859
	struct snd_soc_pcm_runtime *rtd;
860
	struct snd_soc_dai_link_component *codec, *platform;
861
	struct snd_soc_component *component;
862
	int i;
863

864 865 866
	if (dai_link->ignore)
		return 0;

867
	dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
868

869 870 871 872 873
	if (soc_is_dai_link_bound(card, dai_link)) {
		dev_dbg(card->dev, "ASoC: dai link %s already bound\n",
			dai_link->name);
		return 0;
	}
874

S
Sudip Mukherjee 已提交
875 876 877 878
	rtd = soc_new_pcm_runtime(card, dai_link);
	if (!rtd)
		return -ENOMEM;

879 880
	/* FIXME: we need multi CPU support in the future */
	rtd->cpu_dai = snd_soc_find_dai(dai_link->cpus);
881
	if (!rtd->cpu_dai) {
882
		dev_info(card->dev, "ASoC: CPU DAI %s not registered\n",
883
			 dai_link->cpus->dai_name);
884
		goto _err_defer;
885
	}
886
	snd_soc_rtdcom_add(rtd, rtd->cpu_dai->component);
887

888
	/* Find CODEC from registered CODECs */
889
	rtd->num_codecs = dai_link->num_codecs;
890 891
	for_each_link_codecs(dai_link, i, codec) {
		rtd->codec_dais[i] = snd_soc_find_dai(codec);
892
		if (!rtd->codec_dais[i]) {
893
			dev_info(card->dev, "ASoC: CODEC DAI %s not registered\n",
894
				 codec->dai_name);
895
			goto _err_defer;
896
		}
897

898
		snd_soc_rtdcom_add(rtd, rtd->codec_dais[i]->component);
899 900
	}

901
	/* Single codec links expect codec and codec_dai in runtime data */
902
	rtd->codec_dai = rtd->codec_dais[0];
903

904
	/* Find PLATFORM from registered PLATFORMs */
905 906 907 908
	for_each_link_platforms(dai_link, i, platform) {
		for_each_component(component) {
			if (!snd_soc_is_matching_component(platform, component))
				continue;
909

910 911
			snd_soc_rtdcom_add(rtd, component);
		}
912 913
	}

914
	soc_add_pcm_runtime(card, rtd);
915
	return 0;
916 917 918

_err_defer:
	soc_free_pcm_runtime(rtd);
919
	return -EPROBE_DEFER;
920 921
}

922 923
static void soc_cleanup_component(struct snd_soc_component *component)
{
924
	snd_soc_component_set_jack(component, NULL, NULL);
925 926 927 928
	list_del(&component->card_list);
	snd_soc_dapm_free(snd_soc_component_get_dapm(component));
	soc_cleanup_component_debugfs(component);
	component->card = NULL;
929
	if (!component->driver->module_get_upon_open)
930
		module_put(component->dev->driver->owner);
931 932
}

933
static void soc_remove_component(struct snd_soc_component *component)
934
{
935
	if (!component->card)
936
		return;
937

938 939
	if (component->driver->remove)
		component->driver->remove(component);
940

941
	soc_cleanup_component(component);
942 943
}

944
static void soc_remove_dai(struct snd_soc_dai *dai, int order)
945 946 947
{
	int err;

948
	if (!dai || !dai->probed || !dai->driver ||
949 950 951
	    dai->driver->remove_order != order)
		return;

952 953 954 955 956 957
	err = snd_soc_dai_remove(dai);
	if (err < 0)
		dev_err(dai->dev,
			"ASoC: failed to remove %s: %d\n",
			dai->name, err);

958
	dai->probed = 0;
959 960
}

961 962
static void soc_remove_link_dais(struct snd_soc_card *card,
		struct snd_soc_pcm_runtime *rtd, int order)
963
{
964
	int i;
965
	struct snd_soc_dai *codec_dai;
966 967 968 969 970 971 972 973

	/* unregister the rtd device */
	if (rtd->dev_registered) {
		device_unregister(rtd->dev);
		rtd->dev_registered = 0;
	}

	/* remove the CODEC DAI */
974 975
	for_each_rtd_codec_dai(rtd, i, codec_dai)
		soc_remove_dai(codec_dai, order);
976

977
	soc_remove_dai(rtd->cpu_dai, order);
978
}
F
Frank Mandarino 已提交
979

980 981
static void soc_remove_link_components(struct snd_soc_card *card,
	struct snd_soc_pcm_runtime *rtd, int order)
982
{
983
	struct snd_soc_component *component;
984
	struct snd_soc_rtdcom_list *rtdcom;
985

986 987
	for_each_rtdcom(rtd, rtdcom) {
		component = rtdcom->component;
988

989
		if (component->driver->remove_order == order)
990
			soc_remove_component(component);
991 992 993
	}
}

994 995
static void soc_remove_dai_links(struct snd_soc_card *card)
{
996 997
	int order;
	struct snd_soc_pcm_runtime *rtd;
998
	struct snd_soc_dai_link *link, *_link;
999

1000
	for_each_comp_order(order) {
1001
		for_each_card_rtds(card, rtd)
1002
			soc_remove_link_dais(card, rtd, order);
1003 1004
	}

1005
	for_each_comp_order(order) {
1006
		for_each_card_rtds(card, rtd)
1007
			soc_remove_link_components(card, rtd, order);
1008
	}
1009

1010
	for_each_card_links_safe(card, link, _link) {
1011 1012 1013 1014 1015 1016
		if (link->dobj.type == SND_SOC_DOBJ_DAI_LINK)
			dev_warn(card->dev, "Topology forgot to remove link %s?\n",
				link->name);

		list_del(&link->list);
	}
1017 1018
}

1019
static int soc_init_dai_link(struct snd_soc_card *card,
1020
			     struct snd_soc_dai_link *link)
1021
{
1022
	int i;
1023
	struct snd_soc_dai_link_component *codec, *platform;
1024

1025
	for_each_link_codecs(link, i, codec) {
1026 1027 1028 1029
		/*
		 * Codec must be specified by 1 of name or OF node,
		 * not both or neither.
		 */
1030
		if (!!codec->name == !!codec->of_node) {
1031 1032 1033 1034
			dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
				link->name);
			return -EINVAL;
		}
1035

1036
		/* Codec DAI name must be specified */
1037
		if (!codec->dai_name) {
1038 1039 1040 1041
			dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
				link->name);
			return -EINVAL;
		}
1042 1043 1044 1045 1046 1047 1048

		/*
		 * Defer card registration if codec component is not added to
		 * component list.
		 */
		if (!soc_find_component(codec))
			return -EPROBE_DEFER;
1049 1050
	}

1051 1052 1053 1054 1055 1056 1057
	for_each_link_platforms(link, i, platform) {
		/*
		 * Platform may be specified by either name or OF node, but it
		 * can be left unspecified, then no components will be inserted
		 * in the rtdcom list
		 */
		if (!!platform->name == !!platform->of_node) {
1058
			dev_err(card->dev,
1059
				"ASoC: Neither/both platform name/of_node are set for %s\n",
1060 1061 1062 1063 1064
				link->name);
			return -EINVAL;
		}

		/*
1065 1066
		 * Defer card registration if platform component is not added to
		 * component list.
1067
		 */
1068
		if (!soc_find_component(platform))
1069
			return -EPROBE_DEFER;
1070 1071
	}

1072 1073
	/* FIXME */
	if (link->num_cpus > 1) {
1074
		dev_err(card->dev,
1075
			"ASoC: multi cpu is not yet supported %s\n",
1076 1077 1078
			link->name);
		return -EINVAL;
	}
1079

1080 1081 1082 1083 1084
	/*
	 * CPU device may be specified by either name or OF node, but
	 * can be left unspecified, and will be matched based on DAI
	 * name alone..
	 */
1085
	if (link->cpus->name && link->cpus->of_node) {
1086 1087 1088 1089 1090
		dev_err(card->dev,
			"ASoC: Neither/both cpu name/of_node are set for %s\n",
			link->name);
		return -EINVAL;
	}
1091 1092 1093 1094 1095

	/*
	 * Defer card registartion if cpu dai component is not added to
	 * component list.
	 */
1096
	if ((link->cpus->of_node || link->cpus->name) &&
1097
	    !soc_find_component(link->cpus))
1098 1099
		return -EPROBE_DEFER;

1100 1101 1102 1103
	/*
	 * At least one of CPU DAI name or CPU device name/node must be
	 * specified
	 */
1104 1105
	if (!link->cpus->dai_name &&
	    !(link->cpus->name || link->cpus->of_node)) {
1106 1107 1108 1109 1110 1111 1112
		dev_err(card->dev,
			"ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
			link->name);
		return -EINVAL;
	}

	return 0;
1113 1114
}

1115 1116
void snd_soc_disconnect_sync(struct device *dev)
{
1117 1118
	struct snd_soc_component *component =
			snd_soc_lookup_component(dev, NULL);
1119 1120 1121 1122 1123 1124

	if (!component || !component->card)
		return;

	snd_card_disconnect_sync(component->card->snd_card);
}
1125
EXPORT_SYMBOL_GPL(snd_soc_disconnect_sync);
1126

1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148
/**
 * snd_soc_add_dai_link - Add a DAI link dynamically
 * @card: The ASoC card to which the DAI link is added
 * @dai_link: The new DAI link to add
 *
 * This function adds a DAI link to the ASoC card's link list.
 *
 * Note: Topology can use this API to add DAI links when probing the
 * topology component. And machine drivers can still define static
 * DAI links in dai_link array.
 */
int snd_soc_add_dai_link(struct snd_soc_card *card,
		struct snd_soc_dai_link *dai_link)
{
	if (dai_link->dobj.type
	    && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
		dev_err(card->dev, "Invalid dai link type %d\n",
			dai_link->dobj.type);
		return -EINVAL;
	}

	lockdep_assert_held(&client_mutex);
1149 1150
	/*
	 * Notify the machine driver for extra initialization
1151 1152 1153 1154 1155
	 * on the link created by topology.
	 */
	if (dai_link->dobj.type && card->add_dai_link)
		card->add_dai_link(card, dai_link);

1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184
	list_add_tail(&dai_link->list, &card->dai_link_list);

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_add_dai_link);

/**
 * snd_soc_remove_dai_link - Remove a DAI link from the list
 * @card: The ASoC card that owns the link
 * @dai_link: The DAI link to remove
 *
 * This function removes a DAI link from the ASoC card's link list.
 *
 * For DAI links previously added by topology, topology should
 * remove them by using the dobj embedded in the link.
 */
void snd_soc_remove_dai_link(struct snd_soc_card *card,
			     struct snd_soc_dai_link *dai_link)
{
	struct snd_soc_dai_link *link, *_link;

	if (dai_link->dobj.type
	    && dai_link->dobj.type != SND_SOC_DOBJ_DAI_LINK) {
		dev_err(card->dev, "Invalid dai link type %d\n",
			dai_link->dobj.type);
		return;
	}

	lockdep_assert_held(&client_mutex);
1185 1186
	/*
	 * Notify the machine driver for extra destruction
1187 1188 1189 1190 1191
	 * on the link created by topology.
	 */
	if (dai_link->dobj.type && card->remove_dai_link)
		card->remove_dai_link(card, dai_link);

1192
	for_each_card_links_safe(card, link, _link) {
1193 1194 1195 1196 1197 1198 1199 1200
		if (link == dai_link) {
			list_del(&link->list);
			return;
		}
	}
}
EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);

1201 1202
static void soc_set_of_name_prefix(struct snd_soc_component *component)
{
1203
	struct device_node *component_of_node = soc_component_to_node(component);
1204 1205 1206 1207 1208 1209 1210 1211 1212
	const char *str;
	int ret;

	ret = of_property_read_string(component_of_node, "sound-name-prefix",
				      &str);
	if (!ret)
		component->name_prefix = str;
}

1213
static void soc_set_name_prefix(struct snd_soc_card *card,
1214
				struct snd_soc_component *component)
1215 1216 1217
{
	int i;

1218
	for (i = 0; i < card->num_configs && card->codec_conf; i++) {
1219
		struct snd_soc_codec_conf *map = &card->codec_conf[i];
1220
		struct device_node *component_of_node = soc_component_to_node(component);
1221 1222

		if (map->of_node && component_of_node != map->of_node)
1223
			continue;
1224
		if (map->dev_name && strcmp(component->name, map->dev_name))
1225
			continue;
1226
		component->name_prefix = map->name_prefix;
1227
		return;
1228
	}
1229 1230 1231 1232 1233 1234

	/*
	 * If there is no configuration table or no match in the table,
	 * check if a prefix is provided in the node
	 */
	soc_set_of_name_prefix(component);
1235 1236
}

1237 1238
static int soc_probe_component(struct snd_soc_card *card,
	struct snd_soc_component *component)
1239
{
1240 1241
	struct snd_soc_dapm_context *dapm =
			snd_soc_component_get_dapm(component);
1242
	struct snd_soc_dai *dai;
1243
	int ret;
1244

1245
	if (!strcmp(component->name, "snd-soc-dummy"))
1246
		return 0;
1247

1248
	if (component->card) {
1249 1250 1251 1252 1253 1254 1255 1256
		if (component->card != card) {
			dev_err(component->dev,
				"Trying to bind component to card \"%s\" but is already bound to card \"%s\"\n",
				card->name, component->card->name);
			return -ENODEV;
		}
		return 0;
	}
1257

1258
	if (!component->driver->module_get_upon_open &&
1259
	    !try_module_get(component->dev->driver->owner))
1260 1261
		return -ENODEV;

1262 1263
	component->card = card;
	dapm->card = card;
1264 1265
	INIT_LIST_HEAD(&component->card_list);
	INIT_LIST_HEAD(&dapm->list);
1266
	soc_set_name_prefix(card, component);
1267

1268
	soc_init_component_debugfs(component);
1269

1270 1271 1272 1273
	if (component->driver->dapm_widgets) {
		ret = snd_soc_dapm_new_controls(dapm,
					component->driver->dapm_widgets,
					component->driver->num_dapm_widgets);
1274 1275

		if (ret != 0) {
1276
			dev_err(component->dev,
1277 1278 1279 1280
				"Failed to create new controls %d\n", ret);
			goto err_probe;
		}
	}
1281

1282
	for_each_component_dais(component, dai) {
1283
		ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1284
		if (ret != 0) {
1285
			dev_err(component->dev,
1286 1287 1288 1289
				"Failed to create DAI widgets %d\n", ret);
			goto err_probe;
		}
	}
1290

1291 1292
	if (component->driver->probe) {
		ret = component->driver->probe(component);
1293
		if (ret < 0) {
1294 1295
			dev_err(component->dev,
				"ASoC: failed to probe component %d\n", ret);
1296
			goto err_probe;
1297
		}
1298
	}
1299 1300 1301 1302
	WARN(dapm->idle_bias_off &&
	     dapm->bias_level != SND_SOC_BIAS_OFF,
	     "codec %s can not start from non-off bias with idle_bias_off==1\n",
	     component->name);
1303

1304 1305 1306 1307 1308 1309 1310 1311 1312 1313
	/* machine specific init */
	if (component->init) {
		ret = component->init(component);
		if (ret < 0) {
			dev_err(component->dev,
				"Failed to do machine specific init %d\n", ret);
			goto err_probe;
		}
	}

1314 1315 1316 1317
	if (component->driver->controls)
		snd_soc_add_component_controls(component,
					       component->driver->controls,
					       component->driver->num_controls);
1318 1319 1320 1321
	if (component->driver->dapm_routes)
		snd_soc_dapm_add_routes(dapm,
					component->driver->dapm_routes,
					component->driver->num_dapm_routes);
1322

1323
	list_add(&dapm->list, &card->dapm_list);
1324
	/* see for_each_card_components */
1325
	list_add(&component->card_list, &card->component_dev_list);
1326 1327

err_probe:
1328 1329
	if (ret < 0)
		soc_cleanup_component(component);
1330 1331 1332 1333

	return ret;
}

1334 1335 1336 1337
static void rtd_release(struct device *dev)
{
	kfree(dev);
}
1338

1339 1340
static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
	const char *name)
1341
{
1342 1343 1344
	int ret = 0;

	/* register the rtd device */
1345 1346 1347 1348
	rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
	if (!rtd->dev)
		return -ENOMEM;
	device_initialize(rtd->dev);
1349
	rtd->dev->parent = rtd->card->dev;
1350
	rtd->dev->release = rtd_release;
1351
	rtd->dev->groups = soc_dev_attr_groups;
1352
	dev_set_name(rtd->dev, "%s", name);
1353
	dev_set_drvdata(rtd->dev, rtd);
L
Liam Girdwood 已提交
1354
	mutex_init(&rtd->pcm_mutex);
1355 1356 1357 1358
	INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
	INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
	INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
	INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1359
	ret = device_add(rtd->dev);
1360
	if (ret < 0) {
1361 1362
		/* calling put_device() here to free the rtd->dev */
		put_device(rtd->dev);
1363
		dev_err(rtd->card->dev,
1364
			"ASoC: failed to register runtime device: %d\n", ret);
1365 1366 1367 1368 1369 1370
		return ret;
	}
	rtd->dev_registered = 1;
	return 0;
}

1371
static int soc_probe_link_components(struct snd_soc_card *card,
1372
				     struct snd_soc_pcm_runtime *rtd, int order)
1373
{
1374
	struct snd_soc_component *component;
1375 1376
	struct snd_soc_rtdcom_list *rtdcom;
	int ret;
1377

1378 1379
	for_each_rtdcom(rtd, rtdcom) {
		component = rtdcom->component;
1380

1381
		if (component->driver->probe_order == order) {
1382
			ret = soc_probe_component(card, component);
1383 1384 1385
			if (ret < 0)
				return ret;
		}
1386 1387 1388 1389 1390
	}

	return 0;
}

1391
static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1392
{
1393 1394
	int ret;

1395 1396 1397
	if (dai->probed ||
	    dai->driver->probe_order != order)
		return 0;
1398

1399 1400 1401 1402 1403
	ret = snd_soc_dai_probe(dai);
	if (ret < 0) {
		dev_err(dai->dev, "ASoC: failed to probe DAI %s: %d\n",
			dai->name, ret);
		return ret;
1404 1405
	}

1406 1407
	dai->probed = 1;

1408 1409 1410
	return 0;
}

1411 1412 1413 1414 1415 1416 1417 1418
static int soc_link_dai_pcm_new(struct snd_soc_dai **dais, int num_dais,
				struct snd_soc_pcm_runtime *rtd)
{
	int i, ret = 0;

	for (i = 0; i < num_dais; ++i) {
		struct snd_soc_dai_driver *drv = dais[i]->driver;

1419
		if (drv->pcm_new)
1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431
			ret = drv->pcm_new(rtd, dais[i]);
		if (ret < 0) {
			dev_err(dais[i]->dev,
				"ASoC: Failed to bind %s with pcm device\n",
				dais[i]->name);
			return ret;
		}
	}

	return 0;
}

1432 1433
static int soc_probe_link_dais(struct snd_soc_card *card,
		struct snd_soc_pcm_runtime *rtd, int order)
1434
{
1435
	struct snd_soc_dai_link *dai_link = rtd->dai_link;
1436
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1437 1438
	struct snd_soc_rtdcom_list *rtdcom;
	struct snd_soc_component *component;
1439
	struct snd_soc_dai *codec_dai;
1440
	int i, ret, num;
1441

1442
	dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1443
			card->name, rtd->num, order);
1444 1445 1446 1447

	/* set default power off timeout */
	rtd->pmdown_time = pmdown_time;

1448 1449 1450
	ret = soc_probe_dai(cpu_dai, order);
	if (ret)
		return ret;
F
Frank Mandarino 已提交
1451

1452
	/* probe the CODEC DAI */
1453 1454
	for_each_rtd_codec_dai(rtd, i, codec_dai) {
		ret = soc_probe_dai(codec_dai, order);
1455 1456 1457
		if (ret)
			return ret;
	}
M
Mark Brown 已提交
1458

1459 1460 1461 1462
	/* complete DAI probe during last probe */
	if (order != SND_SOC_COMP_ORDER_LAST)
		return 0;

1463 1464 1465 1466 1467 1468 1469 1470 1471 1472
	/* do machine specific initialization */
	if (dai_link->init) {
		ret = dai_link->init(rtd);
		if (ret < 0) {
			dev_err(card->dev, "ASoC: failed to init %s: %d\n",
				dai_link->name, ret);
			return ret;
		}
	}

1473 1474 1475 1476 1477
	if (dai_link->dai_fmt) {
		ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
		if (ret)
			return ret;
	}
1478

1479
	ret = soc_post_component_init(rtd, dai_link->name);
1480
	if (ret)
1481
		return ret;
M
Mark Brown 已提交
1482

1483 1484
#ifdef CONFIG_DEBUG_FS
	/* add DPCM sysfs entries */
1485 1486
	if (dai_link->dynamic)
		soc_dpcm_debugfs_add(rtd);
1487 1488
#endif

1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507
	num = rtd->num;

	/*
	 * most drivers will register their PCMs using DAI link ordering but
	 * topology based drivers can use the DAI link id field to set PCM
	 * device number and then use rtd + a base offset of the BEs.
	 */
	for_each_rtdcom(rtd, rtdcom) {
		component = rtdcom->component;

		if (!component->driver->use_dai_pcm_id)
			continue;

		if (rtd->dai_link->no_pcm)
			num += component->driver->be_pcm_base;
		else
			num = rtd->dai_link->id;
	}

1508 1509 1510 1511
	/* create compress_device if possible */
	ret = snd_soc_dai_compress_new(cpu_dai, rtd, num);
	if (ret != -ENOTSUPP) {
		if (ret < 0)
1512
			dev_err(card->dev, "ASoC: can't create compress %s\n",
1513
					 dai_link->stream_name);
1514 1515 1516
		return ret;
	}

1517 1518 1519 1520 1521 1522
	/* create the pcm */
	ret = soc_new_pcm(rtd, num);
	if (ret < 0) {
		dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
			dai_link->stream_name, ret);
		return ret;
1523
	}
1524 1525 1526 1527 1528 1529
	ret = soc_link_dai_pcm_new(&cpu_dai, 1, rtd);
	if (ret < 0)
		return ret;
	ret = soc_link_dai_pcm_new(rtd->codec_dais,
				   rtd->num_codecs, rtd);
	return ret;
1530 1531
}

1532
static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1533 1534
{
	struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1535
	struct snd_soc_component *component;
1536
	struct snd_soc_dai_link_component dlc;
1537 1538 1539

	if (aux_dev->codec_of_node || aux_dev->codec_name) {
		/* codecs, usually analog devices */
1540 1541 1542
		dlc.name = aux_dev->codec_name;
		dlc.of_node = aux_dev->codec_of_node;
		component = soc_find_component(&dlc);
1543
		if (!component) {
1544 1545
			if (dlc.of_node)
				dlc.name = of_node_full_name(dlc.of_node);
1546 1547 1548 1549
			goto err_defer;
		}
	} else if (aux_dev->name) {
		/* generic components */
1550 1551 1552
		dlc.name = aux_dev->name;
		dlc.of_node = NULL;
		component = soc_find_component(&dlc);
1553 1554 1555 1556 1557
		if (!component)
			goto err_defer;
	} else {
		dev_err(card->dev, "ASoC: Invalid auxiliary device\n");
		return -EINVAL;
1558
	}
1559

1560
	component->init = aux_dev->init;
1561
	list_add(&component->card_aux_list, &card->aux_comp_list);
1562

1563
	return 0;
1564 1565

err_defer:
1566
	dev_err(card->dev, "ASoC: %s not registered\n", dlc.name);
1567
	return -EPROBE_DEFER;
1568 1569
}

1570
static int soc_probe_aux_devices(struct snd_soc_card *card)
1571
{
1572
	struct snd_soc_component *comp;
1573
	int order;
1574
	int ret;
1575

1576
	for_each_comp_order(order) {
1577
		list_for_each_entry(comp, &card->aux_comp_list, card_aux_list) {
1578 1579 1580 1581 1582 1583 1584 1585 1586
			if (comp->driver->probe_order == order) {
				ret = soc_probe_component(card,	comp);
				if (ret < 0) {
					dev_err(card->dev,
						"ASoC: failed to probe aux component %s %d\n",
						comp->name, ret);
					return ret;
				}
			}
1587 1588
		}
	}
1589

1590
	return 0;
1591 1592
}

1593
static void soc_remove_aux_devices(struct snd_soc_card *card)
1594
{
1595 1596
	struct snd_soc_component *comp, *_comp;
	int order;
1597

1598
	for_each_comp_order(order) {
1599
		list_for_each_entry_safe(comp, _comp,
1600
			&card->aux_comp_list, card_aux_list) {
1601

1602 1603
			if (comp->driver->remove_order == order) {
				soc_remove_component(comp);
1604 1605
				/* remove it from the card's aux_comp_list */
				list_del(&comp->card_aux_list);
1606 1607
			}
		}
1608 1609 1610
	}
}

1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627
/**
 * snd_soc_runtime_set_dai_fmt() - Change DAI link format for a ASoC runtime
 * @rtd: The runtime for which the DAI link format should be changed
 * @dai_fmt: The new DAI link format
 *
 * This function updates the DAI link format for all DAIs connected to the DAI
 * link for the specified runtime.
 *
 * Note: For setups with a static format set the dai_fmt field in the
 * corresponding snd_dai_link struct instead of using this function.
 *
 * Returns 0 on success, otherwise a negative error code.
 */
int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd,
	unsigned int dai_fmt)
{
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1628
	struct snd_soc_dai *codec_dai;
1629 1630 1631
	unsigned int i;
	int ret;

1632
	for_each_rtd_codec_dai(rtd, i, codec_dai) {
1633 1634 1635 1636 1637 1638 1639 1640
		ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
		if (ret != 0 && ret != -ENOTSUPP) {
			dev_warn(codec_dai->dev,
				 "ASoC: Failed to set DAI format: %d\n", ret);
			return ret;
		}
	}

1641 1642 1643 1644
	/*
	 * Flip the polarity for the "CPU" end of a CODEC<->CODEC link
	 * the component which has non_legacy_dai_naming is Codec
	 */
1645
	if (cpu_dai->component->driver->non_legacy_dai_naming) {
1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675
		unsigned int inv_dai_fmt;

		inv_dai_fmt = dai_fmt & ~SND_SOC_DAIFMT_MASTER_MASK;
		switch (dai_fmt & SND_SOC_DAIFMT_MASTER_MASK) {
		case SND_SOC_DAIFMT_CBM_CFM:
			inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
			break;
		case SND_SOC_DAIFMT_CBM_CFS:
			inv_dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
			break;
		case SND_SOC_DAIFMT_CBS_CFM:
			inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
			break;
		case SND_SOC_DAIFMT_CBS_CFS:
			inv_dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
			break;
		}

		dai_fmt = inv_dai_fmt;
	}

	ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
	if (ret != 0 && ret != -ENOTSUPP) {
		dev_warn(cpu_dai->dev,
			 "ASoC: Failed to set DAI format: %d\n", ret);
		return ret;
	}

	return 0;
}
1676
EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1677

1678
#ifdef CONFIG_DMI
1679 1680
/*
 * Trim special characters, and replace '-' with '_' since '-' is used to
1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698
 * separate different DMI fields in the card long name. Only number and
 * alphabet characters and a few separator characters are kept.
 */
static void cleanup_dmi_name(char *name)
{
	int i, j = 0;

	for (i = 0; name[i]; i++) {
		if (isalnum(name[i]) || (name[i] == '.')
		    || (name[i] == '_'))
			name[j++] = name[i];
		else if (name[i] == '-')
			name[j++] = '_';
	}

	name[j] = '\0';
}

1699 1700
/*
 * Check if a DMI field is valid, i.e. not containing any string
1701 1702 1703 1704 1705 1706 1707 1708 1709 1710
 * in the black list.
 */
static int is_dmi_valid(const char *field)
{
	int i = 0;

	while (dmi_blacklist[i]) {
		if (strstr(field, dmi_blacklist[i]))
			return 0;
		i++;
1711
	}
1712 1713 1714 1715

	return 1;
}

1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757
/**
 * snd_soc_set_dmi_name() - Register DMI names to card
 * @card: The card to register DMI names
 * @flavour: The flavour "differentiator" for the card amongst its peers.
 *
 * An Intel machine driver may be used by many different devices but are
 * difficult for userspace to differentiate, since machine drivers ususally
 * use their own name as the card short name and leave the card long name
 * blank. To differentiate such devices and fix bugs due to lack of
 * device-specific configurations, this function allows DMI info to be used
 * as the sound card long name, in the format of
 * "vendor-product-version-board"
 * (Character '-' is used to separate different DMI fields here).
 * This will help the user space to load the device-specific Use Case Manager
 * (UCM) configurations for the card.
 *
 * Possible card long names may be:
 * DellInc.-XPS139343-01-0310JH
 * ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
 * Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
 *
 * This function also supports flavoring the card longname to provide
 * the extra differentiation, like "vendor-product-version-board-flavor".
 *
 * We only keep number and alphabet characters and a few separator characters
 * in the card long name since UCM in the user space uses the card long names
 * as card configuration directory names and AudoConf cannot support special
 * charactors like SPACE.
 *
 * Returns 0 on success, otherwise a negative error code.
 */
int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
{
	const char *vendor, *product, *product_version, *board;
	size_t longname_buf_size = sizeof(card->snd_card->longname);
	size_t len;

	if (card->long_name)
		return 0; /* long name already set by driver or from DMI */

	/* make up dmi long name as: vendor.product.version.board */
	vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1758
	if (!vendor || !is_dmi_valid(vendor)) {
1759 1760 1761 1762 1763 1764 1765 1766 1767
		dev_warn(card->dev, "ASoC: no DMI vendor name!\n");
		return 0;
	}

	snprintf(card->dmi_longname, sizeof(card->snd_card->longname),
			 "%s", vendor);
	cleanup_dmi_name(card->dmi_longname);

	product = dmi_get_system_info(DMI_PRODUCT_NAME);
1768
	if (product && is_dmi_valid(product)) {
1769 1770 1771 1772 1773 1774 1775 1776 1777
		len = strlen(card->dmi_longname);
		snprintf(card->dmi_longname + len,
			 longname_buf_size - len,
			 "-%s", product);

		len++;	/* skip the separator "-" */
		if (len < longname_buf_size)
			cleanup_dmi_name(card->dmi_longname + len);

1778 1779
		/*
		 * some vendors like Lenovo may only put a self-explanatory
1780 1781 1782
		 * name in the product version field
		 */
		product_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
1783
		if (product_version && is_dmi_valid(product_version)) {
1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795
			len = strlen(card->dmi_longname);
			snprintf(card->dmi_longname + len,
				 longname_buf_size - len,
				 "-%s", product_version);

			len++;
			if (len < longname_buf_size)
				cleanup_dmi_name(card->dmi_longname + len);
		}
	}

	board = dmi_get_system_info(DMI_BOARD_NAME);
1796
	if (board && is_dmi_valid(board)) {
1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828
		len = strlen(card->dmi_longname);
		snprintf(card->dmi_longname + len,
			 longname_buf_size - len,
			 "-%s", board);

		len++;
		if (len < longname_buf_size)
			cleanup_dmi_name(card->dmi_longname + len);
	} else if (!product) {
		/* fall back to using legacy name */
		dev_warn(card->dev, "ASoC: no DMI board/product name!\n");
		return 0;
	}

	/* Add flavour to dmi long name */
	if (flavour) {
		len = strlen(card->dmi_longname);
		snprintf(card->dmi_longname + len,
			 longname_buf_size - len,
			 "-%s", flavour);

		len++;
		if (len < longname_buf_size)
			cleanup_dmi_name(card->dmi_longname + len);
	}

	/* set the card long name */
	card->long_name = card->dmi_longname;

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_set_dmi_name);
1829
#endif /* CONFIG_DMI */
1830

1831 1832 1833 1834 1835 1836 1837
static void soc_check_tplg_fes(struct snd_soc_card *card)
{
	struct snd_soc_component *component;
	const struct snd_soc_component_driver *comp_drv;
	struct snd_soc_dai_link *dai_link;
	int i;

1838
	for_each_component(component) {
1839 1840 1841 1842 1843 1844

		/* does this component override FEs ? */
		if (!component->driver->ignore_machine)
			continue;

		/* for this machine ? */
1845 1846 1847
		if (!strcmp(component->driver->ignore_machine,
			    card->dev->driver->name))
			goto match;
1848
		if (strcmp(component->driver->ignore_machine,
1849
			   dev_name(card->dev)))
1850
			continue;
1851
match:
1852
		/* machine matches, so override the rtd data */
1853
		for_each_card_prelinks(card, i, dai_link) {
1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864

			/* ignore this FE */
			if (dai_link->dynamic) {
				dai_link->ignore = true;
				continue;
			}

			dev_info(card->dev, "info: override FE DAI link %s\n",
				 card->dai_link[i].name);

			/* override platform component */
1865
			if (!dai_link->platforms) {
1866 1867 1868
				dev_err(card->dev, "init platform error");
				continue;
			}
1869
			dai_link->platforms->name = component->name;
1870 1871 1872 1873 1874 1875 1876 1877

			/* convert non BE into BE */
			dai_link->no_pcm = 1;

			/* override any BE fixups */
			dai_link->be_hw_params_fixup =
				component->driver->be_hw_params_fixup;

1878 1879
			/*
			 * most BE links don't set stream name, so set it to
1880 1881 1882 1883 1884 1885 1886 1887 1888
			 * dai link name if it's NULL to help bind widgets.
			 */
			if (!dai_link->stream_name)
				dai_link->stream_name = dai_link->name;
		}

		/* Inform userspace we are using alternate topology */
		if (component->driver->topology_name_prefix) {

1889
			/* topology shortname created? */
1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904
			if (!card->topology_shortname_created) {
				comp_drv = component->driver;

				snprintf(card->topology_shortname, 32, "%s-%s",
					 comp_drv->topology_name_prefix,
					 card->name);
				card->topology_shortname_created = true;
			}

			/* use topology shortname */
			card->name = card->topology_shortname;
		}
	}
}

1905 1906 1907
static int soc_cleanup_card_resources(struct snd_soc_card *card)
{
	/* free the ALSA card at first; this syncs with pending operations */
1908
	if (card->snd_card) {
1909
		snd_card_free(card->snd_card);
1910 1911
		card->snd_card = NULL;
	}
1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929

	/* remove and free each DAI */
	soc_remove_dai_links(card);
	soc_remove_pcm_runtimes(card);

	/* remove auxiliary devices */
	soc_remove_aux_devices(card);

	snd_soc_dapm_free(&card->dapm);
	soc_cleanup_card_debugfs(card);

	/* remove the card */
	if (card->remove)
		card->remove(card);

	return 0;
}

1930
static int snd_soc_instantiate_card(struct snd_soc_card *card)
1931
{
1932
	struct snd_soc_pcm_runtime *rtd;
1933
	struct snd_soc_dai_link *dai_link;
1934
	int ret, i, order;
M
Mark Brown 已提交
1935

1936
	mutex_lock(&client_mutex);
1937 1938 1939 1940 1941 1942 1943 1944 1945
	for_each_card_prelinks(card, i, dai_link) {
		ret = soc_init_dai_link(card, dai_link);
		if (ret) {
			dev_err(card->dev, "ASoC: failed to init link %s: %d\n",
				dai_link->name, ret);
			mutex_unlock(&client_mutex);
			return ret;
		}
	}
1946
	mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1947

1948 1949 1950 1951 1952
	card->dapm.bias_level = SND_SOC_BIAS_OFF;
	card->dapm.dev = card->dev;
	card->dapm.card = card;
	list_add(&card->dapm.list, &card->dapm_list);

1953 1954 1955
	/* check whether any platform is ignore machine FE and using topology */
	soc_check_tplg_fes(card);

1956
	/* bind DAIs */
1957 1958
	for_each_card_prelinks(card, i, dai_link) {
		ret = soc_bind_dai_link(card, dai_link);
1959
		if (ret != 0)
1960
			goto probe_end;
1961
	}
M
Mark Brown 已提交
1962

1963
	/* bind aux_devs too */
1964
	for (i = 0; i < card->num_aux_devs; i++) {
1965
		ret = soc_bind_aux_dev(card, i);
1966
		if (ret != 0)
1967
			goto probe_end;
1968
	}
1969

1970
	/* add predefined DAI links to the list */
1971 1972
	for_each_card_prelinks(card, i, dai_link)
		snd_soc_add_dai_link(card, dai_link);
1973

1974
	/* card bind complete so register a sound card */
1975
	ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1976 1977
			card->owner, 0, &card->snd_card);
	if (ret < 0) {
1978 1979 1980
		dev_err(card->dev,
			"ASoC: can't create sound card for card %s: %d\n",
			card->name, ret);
1981
		goto probe_end;
1982 1983
	}

1984 1985
	soc_init_card_debugfs(card);

1986 1987 1988 1989
#ifdef CONFIG_DEBUG_FS
	snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
#endif

1990
#ifdef CONFIG_PM_SLEEP
1991 1992 1993
	/* deferred resume work */
	INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
#endif
F
Frank Mandarino 已提交
1994

1995 1996 1997 1998
	if (card->dapm_widgets)
		snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
					  card->num_dapm_widgets);

1999 2000 2001 2002
	if (card->of_dapm_widgets)
		snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
					  card->num_of_dapm_widgets);

2003 2004
	/* initialise the sound card only once */
	if (card->probe) {
2005
		ret = card->probe(card);
2006
		if (ret < 0)
2007
			goto probe_end;
2008
	}
M
Mark Brown 已提交
2009

2010
	/* probe all components used by DAI links on this card */
2011
	for_each_comp_order(order) {
2012
		for_each_card_rtds(card, rtd) {
2013
			ret = soc_probe_link_components(card, rtd, order);
2014
			if (ret < 0) {
2015 2016 2017
				dev_err(card->dev,
					"ASoC: failed to instantiate card %d\n",
					ret);
2018
				goto probe_end;
2019 2020 2021 2022
			}
		}
	}

2023 2024 2025
	/* probe auxiliary components */
	ret = soc_probe_aux_devices(card);
	if (ret < 0)
2026
		goto probe_end;
2027

2028 2029
	/*
	 * Find new DAI links added during probing components and bind them.
2030 2031
	 * Components with topology may bring new DAIs and DAI links.
	 */
2032
	for_each_card_links(card, dai_link) {
2033 2034 2035 2036 2037
		if (soc_is_dai_link_bound(card, dai_link))
			continue;

		ret = soc_init_dai_link(card, dai_link);
		if (ret)
2038
			goto probe_end;
2039 2040
		ret = soc_bind_dai_link(card, dai_link);
		if (ret)
2041
			goto probe_end;
2042 2043
	}

2044
	/* probe all DAI links on this card */
2045
	for_each_comp_order(order) {
2046
		for_each_card_rtds(card, rtd) {
2047
			ret = soc_probe_link_dais(card, rtd, order);
2048
			if (ret < 0) {
2049 2050 2051
				dev_err(card->dev,
					"ASoC: failed to instantiate card %d\n",
					ret);
2052
				goto probe_end;
2053
			}
2054 2055
		}
	}
F
Frank Mandarino 已提交
2056

2057
	snd_soc_dapm_link_dai_widgets(card);
2058
	snd_soc_dapm_connect_dai_link_widgets(card);
2059

2060
	if (card->controls)
2061 2062
		snd_soc_add_card_controls(card, card->controls,
					  card->num_controls);
2063

2064 2065 2066 2067
	if (card->dapm_routes)
		snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
					card->num_dapm_routes);

2068 2069 2070
	if (card->of_dapm_routes)
		snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
					card->num_of_dapm_routes);
2071

2072 2073 2074
	/* try to set some sane longname if DMI is available */
	snd_soc_set_dmi_name(card, NULL);

2075 2076
	snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
		 "%s", card->name);
2077 2078
	snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
		 "%s", card->long_name ? card->long_name : card->name);
2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092
	snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
		 "%s", card->driver_name ? card->driver_name : card->name);
	for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
		switch (card->snd_card->driver[i]) {
		case '_':
		case '-':
		case '\0':
			break;
		default:
			if (!isalnum(card->snd_card->driver[i]))
				card->snd_card->driver[i] = '_';
			break;
		}
	}
2093

2094 2095 2096
	if (card->late_probe) {
		ret = card->late_probe(card);
		if (ret < 0) {
2097
			dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2098
				card->name, ret);
2099
			goto probe_end;
2100 2101 2102
		}
	}

2103
	snd_soc_dapm_new_widgets(card);
2104

2105 2106
	ret = snd_card_register(card->snd_card);
	if (ret < 0) {
2107 2108
		dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
				ret);
2109
		goto probe_end;
F
Frank Mandarino 已提交
2110 2111
	}

2112
	card->instantiated = 1;
2113
	dapm_mark_endpoints_dirty(card);
2114
	snd_soc_dapm_sync(&card->dapm);
2115

2116 2117 2118
probe_end:
	if (ret < 0)
		soc_cleanup_card_resources(card);
2119 2120

	mutex_unlock(&card->mutex);
2121
	mutex_unlock(&client_mutex);
F
Frank Mandarino 已提交
2122

2123
	return ret;
2124 2125 2126 2127 2128
}

/* probes a new socdev */
static int soc_probe(struct platform_device *pdev)
{
2129
	struct snd_soc_card *card = platform_get_drvdata(pdev);
2130

2131 2132 2133 2134 2135 2136 2137
	/*
	 * no card, so machine driver should be registering card
	 * we should not be here in that case so ret error
	 */
	if (!card)
		return -EINVAL;

2138
	dev_warn(&pdev->dev,
2139
		 "ASoC: machine %s should use snd_soc_register_card()\n",
2140 2141
		 card->name);

2142 2143
	/* Bodge while we unpick instantiation */
	card->dev = &pdev->dev;
2144

2145
	return snd_soc_register_card(card);
F
Frank Mandarino 已提交
2146 2147
}

2148 2149 2150 2151
/* removes a socdev */
static int soc_remove(struct platform_device *pdev)
{
	struct snd_soc_card *card = platform_get_drvdata(pdev);
F
Frank Mandarino 已提交
2152

M
Mark Brown 已提交
2153
	snd_soc_unregister_card(card);
F
Frank Mandarino 已提交
2154 2155 2156
	return 0;
}

2157
int snd_soc_poweroff(struct device *dev)
M
Mark Brown 已提交
2158
{
2159
	struct snd_soc_card *card = dev_get_drvdata(dev);
2160
	struct snd_soc_pcm_runtime *rtd;
M
Mark Brown 已提交
2161 2162

	if (!card->instantiated)
M
Mark Brown 已提交
2163
		return 0;
M
Mark Brown 已提交
2164

2165 2166 2167 2168
	/*
	 * Flush out pmdown_time work - we actually do want to run it
	 * now, we're shutting down so no imminent restart.
	 */
2169
	snd_soc_flush_all_delayed_work(card);
M
Mark Brown 已提交
2170

2171
	snd_soc_dapm_shutdown(card);
M
Mark Brown 已提交
2172

2173
	/* deactivate pins to sleep state */
2174
	for_each_card_rtds(card, rtd) {
2175
		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2176
		struct snd_soc_dai *codec_dai;
2177
		int i;
2178

2179
		pinctrl_pm_select_sleep_state(cpu_dai->dev);
2180
		for_each_rtd_codec_dai(rtd, i, codec_dai) {
2181 2182
			pinctrl_pm_select_sleep_state(codec_dai->dev);
		}
2183 2184
	}

M
Mark Brown 已提交
2185
	return 0;
M
Mark Brown 已提交
2186
}
2187
EXPORT_SYMBOL_GPL(snd_soc_poweroff);
M
Mark Brown 已提交
2188

2189
const struct dev_pm_ops snd_soc_pm_ops = {
2190 2191 2192 2193
	.suspend = snd_soc_suspend,
	.resume = snd_soc_resume,
	.freeze = snd_soc_suspend,
	.thaw = snd_soc_resume,
2194
	.poweroff = snd_soc_poweroff,
2195
	.restore = snd_soc_resume,
M
Mark Brown 已提交
2196
};
2197
EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
M
Mark Brown 已提交
2198

F
Frank Mandarino 已提交
2199 2200 2201 2202
/* ASoC platform driver */
static struct platform_driver soc_driver = {
	.driver		= {
		.name		= "soc-audio",
2203
		.pm		= &snd_soc_pm_ops,
F
Frank Mandarino 已提交
2204 2205 2206 2207 2208 2209 2210 2211 2212
	},
	.probe		= soc_probe,
	.remove		= soc_remove,
};

/**
 * snd_soc_cnew - create new control
 * @_template: control template
 * @data: control private data
M
Mark Brown 已提交
2213
 * @long_name: control long name
2214
 * @prefix: control name prefix
F
Frank Mandarino 已提交
2215 2216 2217 2218 2219 2220
 *
 * Create a new mixer control from a template control.
 *
 * Returns 0 for success, else error.
 */
struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
2221
				  void *data, const char *long_name,
2222
				  const char *prefix)
F
Frank Mandarino 已提交
2223 2224
{
	struct snd_kcontrol_new template;
2225 2226
	struct snd_kcontrol *kcontrol;
	char *name = NULL;
F
Frank Mandarino 已提交
2227 2228 2229 2230

	memcpy(&template, _template, sizeof(template));
	template.index = 0;

2231 2232 2233 2234
	if (!long_name)
		long_name = template.name;

	if (prefix) {
2235
		name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248
		if (!name)
			return NULL;

		template.name = name;
	} else {
		template.name = long_name;
	}

	kcontrol = snd_ctl_new1(&template, data);

	kfree(name);

	return kcontrol;
F
Frank Mandarino 已提交
2249 2250 2251
}
EXPORT_SYMBOL_GPL(snd_soc_cnew);

2252 2253 2254 2255 2256 2257 2258 2259
static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
	const struct snd_kcontrol_new *controls, int num_controls,
	const char *prefix, void *data)
{
	int err, i;

	for (i = 0; i < num_controls; i++) {
		const struct snd_kcontrol_new *control = &controls[i];
2260

2261 2262 2263
		err = snd_ctl_add(card, snd_soc_cnew(control, data,
						     control->name, prefix));
		if (err < 0) {
2264 2265
			dev_err(dev, "ASoC: Failed to add %s: %d\n",
				control->name, err);
2266 2267 2268 2269 2270 2271 2272
			return err;
		}
	}

	return 0;
}

2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288
struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
					       const char *name)
{
	struct snd_card *card = soc_card->snd_card;
	struct snd_kcontrol *kctl;

	if (unlikely(!name))
		return NULL;

	list_for_each_entry(kctl, &card->controls, list)
		if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name)))
			return kctl;
	return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_card_get_kcontrol);

2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307
/**
 * snd_soc_add_component_controls - Add an array of controls to a component.
 *
 * @component: Component to add controls to
 * @controls: Array of controls to add
 * @num_controls: Number of elements in the array
 *
 * Return: 0 for success, else error.
 */
int snd_soc_add_component_controls(struct snd_soc_component *component,
	const struct snd_kcontrol_new *controls, unsigned int num_controls)
{
	struct snd_card *card = component->card->snd_card;

	return snd_soc_add_controls(card, component->dev, controls,
			num_controls, component->name_prefix, component);
}
EXPORT_SYMBOL_GPL(snd_soc_add_component_controls);

2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340
/**
 * snd_soc_add_card_controls - add an array of controls to a SoC card.
 * Convenience function to add a list of controls.
 *
 * @soc_card: SoC card to add controls to
 * @controls: array of controls to add
 * @num_controls: number of elements in the array
 *
 * Return 0 for success, else error.
 */
int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
	const struct snd_kcontrol_new *controls, int num_controls)
{
	struct snd_card *card = soc_card->snd_card;

	return snd_soc_add_controls(card, soc_card->dev, controls, num_controls,
			NULL, soc_card);
}
EXPORT_SYMBOL_GPL(snd_soc_add_card_controls);

/**
 * snd_soc_add_dai_controls - add an array of controls to a DAI.
 * Convienience function to add a list of controls.
 *
 * @dai: DAI to add controls to
 * @controls: array of controls to add
 * @num_controls: number of elements in the array
 *
 * Return 0 for success, else error.
 */
int snd_soc_add_dai_controls(struct snd_soc_dai *dai,
	const struct snd_kcontrol_new *controls, int num_controls)
{
2341
	struct snd_card *card = dai->component->card->snd_card;
2342 2343 2344 2345 2346 2347

	return snd_soc_add_controls(card, dai->dev, controls, num_controls,
			NULL, dai);
}
EXPORT_SYMBOL_GPL(snd_soc_add_dai_controls);

2348 2349 2350 2351 2352 2353 2354 2355 2356 2357
static int snd_soc_bind_card(struct snd_soc_card *card)
{
	struct snd_soc_pcm_runtime *rtd;
	int ret;

	ret = snd_soc_instantiate_card(card);
	if (ret != 0)
		return ret;

	/* deactivate pins to sleep state */
2358
	for_each_card_rtds(card, rtd) {
2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374
		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
		struct snd_soc_dai *codec_dai;
		int j;

		for_each_rtd_codec_dai(rtd, j, codec_dai) {
			if (!codec_dai->active)
				pinctrl_pm_select_sleep_state(codec_dai->dev);
		}

		if (!cpu_dai->active)
			pinctrl_pm_select_sleep_state(cpu_dai->dev);
	}

	return ret;
}

M
Mark Brown 已提交
2375 2376 2377
/**
 * snd_soc_register_card - Register a card with the ASoC core
 *
M
Mark Brown 已提交
2378
 * @card: Card to register
M
Mark Brown 已提交
2379 2380
 *
 */
2381
int snd_soc_register_card(struct snd_soc_card *card)
M
Mark Brown 已提交
2382 2383 2384 2385
{
	if (!card->name || !card->dev)
		return -EINVAL;

M
Mark Brown 已提交
2386 2387
	dev_set_drvdata(card->dev, card);

2388 2389
	snd_soc_initialize_card_lists(card);

2390 2391
	INIT_LIST_HEAD(&card->dai_link_list);

2392 2393 2394
	INIT_LIST_HEAD(&card->rtd_list);
	card->num_rtd = 0;

2395
	INIT_LIST_HEAD(&card->dapm_dirty);
2396
	INIT_LIST_HEAD(&card->dobj_list);
M
Mark Brown 已提交
2397
	card->instantiated = 0;
2398
	mutex_init(&card->mutex);
2399
	mutex_init(&card->dapm_mutex);
2400
	spin_lock_init(&card->dpcm_lock);
M
Mark Brown 已提交
2401

2402 2403 2404
	return snd_soc_bind_card(card);
}
EXPORT_SYMBOL_GPL(snd_soc_register_card);
2405

2406 2407
static void snd_soc_unbind_card(struct snd_soc_card *card, bool unregister)
{
2408 2409 2410
	struct snd_soc_pcm_runtime *rtd;
	int order;

2411 2412 2413
	if (card->instantiated) {
		card->instantiated = false;
		snd_soc_dapm_shutdown(card);
2414
		snd_soc_flush_all_delayed_work(card);
2415 2416 2417 2418 2419 2420 2421 2422

		/* remove all components used by DAI links on this card */
		for_each_comp_order(order) {
			for_each_card_rtds(card, rtd) {
				soc_remove_link_components(card, rtd, order);
			}
		}

2423 2424 2425 2426 2427 2428
		soc_cleanup_card_resources(card);
		if (!unregister)
			list_add(&card->list, &unbind_card_list);
	} else {
		if (unregister)
			list_del(&card->list);
2429
	}
M
Mark Brown 已提交
2430 2431 2432 2433 2434
}

/**
 * snd_soc_unregister_card - Unregister a card with the ASoC core
 *
M
Mark Brown 已提交
2435
 * @card: Card to unregister
M
Mark Brown 已提交
2436 2437
 *
 */
2438
int snd_soc_unregister_card(struct snd_soc_card *card)
M
Mark Brown 已提交
2439
{
2440
	mutex_lock(&client_mutex);
2441
	snd_soc_unbind_card(card, true);
2442
	mutex_unlock(&client_mutex);
2443
	dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
M
Mark Brown 已提交
2444 2445 2446

	return 0;
}
2447
EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
M
Mark Brown 已提交
2448

2449 2450 2451 2452
/*
 * Simplify DAI link configuration by removing ".-1" from device names
 * and sanitizing names.
 */
2453
static char *fmt_single_name(struct device *dev, int *id)
2454 2455 2456 2457 2458 2459 2460
{
	char *found, name[NAME_SIZE];
	int id1, id2;

	if (dev_name(dev) == NULL)
		return NULL;

2461
	strlcpy(name, dev_name(dev), NAME_SIZE);
2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474

	/* are we a "%s.%d" name (platform and SPI components) */
	found = strstr(name, dev->driver->name);
	if (found) {
		/* get ID */
		if (sscanf(&found[strlen(dev->driver->name)], ".%d", id) == 1) {

			/* discard ID from name if ID == -1 */
			if (*id == -1)
				found[strlen(dev->driver->name)] = '\0';
		}

	} else {
2475
		/* I2C component devices are named "bus-addr" */
2476 2477 2478 2479
		if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
			char tmp[NAME_SIZE];

			/* create unique ID number from I2C addr and bus */
2480
			*id = ((id1 & 0xffff) << 16) + id2;
2481 2482

			/* sanitize component name for DAI link creation */
2483 2484
			snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name,
				 name);
2485
			strlcpy(name, tmp, NAME_SIZE);
2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500
		} else
			*id = 0;
	}

	return kstrdup(name, GFP_KERNEL);
}

/*
 * Simplify DAI link naming for single devices with multiple DAIs by removing
 * any ".-1" and using the DAI name (instead of device name).
 */
static inline char *fmt_multiple_name(struct device *dev,
		struct snd_soc_dai_driver *dai_drv)
{
	if (dai_drv->name == NULL) {
2501 2502 2503
		dev_err(dev,
			"ASoC: error - multiple DAI %s registered with no name\n",
			dev_name(dev));
2504 2505 2506 2507 2508 2509
		return NULL;
	}

	return kstrdup(dai_drv->name, GFP_KERNEL);
}

M
Mark Brown 已提交
2510
/**
2511
 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
M
Mark Brown 已提交
2512
 *
2513
 * @component: The component for which the DAIs should be unregistered
M
Mark Brown 已提交
2514
 */
2515
static void snd_soc_unregister_dais(struct snd_soc_component *component)
M
Mark Brown 已提交
2516
{
L
Lars-Peter Clausen 已提交
2517
	struct snd_soc_dai *dai, *_dai;
M
Mark Brown 已提交
2518

2519
	for_each_component_dais_safe(component, dai, _dai) {
2520 2521
		dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
			dai->name);
L
Lars-Peter Clausen 已提交
2522
		list_del(&dai->list);
2523
		kfree(dai->name);
2524 2525
		kfree(dai);
	}
M
Mark Brown 已提交
2526 2527
}

2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550
/* Create a DAI and add it to the component's DAI list */
static struct snd_soc_dai *soc_add_dai(struct snd_soc_component *component,
	struct snd_soc_dai_driver *dai_drv,
	bool legacy_dai_naming)
{
	struct device *dev = component->dev;
	struct snd_soc_dai *dai;

	dev_dbg(dev, "ASoC: dynamically register DAI %s\n", dev_name(dev));

	dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
	if (dai == NULL)
		return NULL;

	/*
	 * Back in the old days when we still had component-less DAIs,
	 * instead of having a static name, component-less DAIs would
	 * inherit the name of the parent device so it is possible to
	 * register multiple instances of the DAI. We still need to keep
	 * the same naming style even though those DAIs are not
	 * component-less anymore.
	 */
	if (legacy_dai_naming &&
2551
	    (dai_drv->id == 0 || dai_drv->name == NULL)) {
2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570
		dai->name = fmt_single_name(dev, &dai->id);
	} else {
		dai->name = fmt_multiple_name(dev, dai_drv);
		if (dai_drv->id)
			dai->id = dai_drv->id;
		else
			dai->id = component->num_dai;
	}
	if (dai->name == NULL) {
		kfree(dai);
		return NULL;
	}

	dai->component = component;
	dai->dev = dev;
	dai->driver = dai_drv;
	if (!dai->driver->ops)
		dai->driver->ops = &null_dai_ops;

2571
	/* see for_each_component_dais */
2572
	list_add_tail(&dai->list, &component->dai_list);
2573 2574 2575 2576 2577 2578
	component->num_dai++;

	dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
	return dai;
}

M
Mark Brown 已提交
2579
/**
2580
 * snd_soc_register_dais - Register a DAI with the ASoC core
M
Mark Brown 已提交
2581
 *
2582 2583
 * @component: The component the DAIs are registered for
 * @dai_drv: DAI driver to use for the DAIs
M
Mark Brown 已提交
2584
 * @count: Number of DAIs
M
Mark Brown 已提交
2585
 */
2586
static int snd_soc_register_dais(struct snd_soc_component *component,
2587 2588
				 struct snd_soc_dai_driver *dai_drv,
				 size_t count)
M
Mark Brown 已提交
2589
{
2590
	struct device *dev = component->dev;
2591
	struct snd_soc_dai *dai;
2592 2593
	unsigned int i;
	int ret;
2594

2595
	dev_dbg(dev, "ASoC: dai register %s #%zu\n", dev_name(dev), count);
M
Mark Brown 已提交
2596 2597

	for (i = 0; i < count; i++) {
2598

2599 2600
		dai = soc_add_dai(component, dai_drv + i, count == 1 &&
				  !component->driver->non_legacy_dai_naming);
2601 2602 2603 2604
		if (dai == NULL) {
			ret = -ENOMEM;
			goto err;
		}
M
Mark Brown 已提交
2605
	}
2606

M
Mark Brown 已提交
2607
	return 0;
2608

M
Mark Brown 已提交
2609
err:
2610
	snd_soc_unregister_dais(component);
2611

M
Mark Brown 已提交
2612 2613 2614
	return ret;
}

2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631
/**
 * snd_soc_register_dai - Register a DAI dynamically & create its widgets
 *
 * @component: The component the DAIs are registered for
 * @dai_drv: DAI driver to use for the DAI
 *
 * Topology can use this API to register DAIs when probing a component.
 * These DAIs's widgets will be freed in the card cleanup and the DAIs
 * will be freed in the component cleanup.
 */
int snd_soc_register_dai(struct snd_soc_component *component,
	struct snd_soc_dai_driver *dai_drv)
{
	struct snd_soc_dapm_context *dapm =
		snd_soc_component_get_dapm(component);
	struct snd_soc_dai *dai;
	int ret;
2632

2633 2634 2635 2636
	if (dai_drv->dobj.type != SND_SOC_DOBJ_PCM) {
		dev_err(component->dev, "Invalid dai type %d\n",
			dai_drv->dobj.type);
		return -EINVAL;
M
Mark Brown 已提交
2637 2638
	}

2639 2640 2641 2642
	lockdep_assert_held(&client_mutex);
	dai = soc_add_dai(component, dai_drv, false);
	if (!dai)
		return -ENOMEM;
M
Mark Brown 已提交
2643

2644 2645
	/*
	 * Create the DAI widgets here. After adding DAIs, topology may
2646 2647 2648 2649 2650 2651 2652
	 * also add routes that need these widgets as source or sink.
	 */
	ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
	if (ret != 0) {
		dev_err(component->dev,
			"Failed to create DAI widgets %d\n", ret);
	}
M
Mark Brown 已提交
2653 2654 2655

	return ret;
}
2656
EXPORT_SYMBOL_GPL(snd_soc_register_dai);
M
Mark Brown 已提交
2657

2658 2659
static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
	enum snd_soc_dapm_type type, int subseq)
2660
{
2661
	struct snd_soc_component *component = dapm->component;
2662

2663 2664
	component->driver->seq_notifier(component, type, subseq);
}
2665

2666 2667 2668 2669
static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
	int event)
{
	struct snd_soc_component *component = dapm->component;
2670

2671 2672
	return component->driver->stream_event(component, event);
}
2673

2674 2675 2676 2677 2678 2679 2680 2681
static int snd_soc_component_set_bias_level(struct snd_soc_dapm_context *dapm,
					enum snd_soc_bias_level level)
{
	struct snd_soc_component *component = dapm->component;

	return component->driver->set_bias_level(component, level);
}

2682 2683
static int snd_soc_component_initialize(struct snd_soc_component *component,
	const struct snd_soc_component_driver *driver, struct device *dev)
2684
{
2685 2686
	struct snd_soc_dapm_context *dapm;

2687 2688 2689
	component->name = fmt_single_name(dev, &component->id);
	if (!component->name) {
		dev_err(dev, "ASoC: Failed to allocate name\n");
2690 2691 2692
		return -ENOMEM;
	}

2693 2694
	component->dev = dev;
	component->driver = driver;
2695

2696
	dapm = snd_soc_component_get_dapm(component);
2697 2698 2699
	dapm->dev = dev;
	dapm->component = component;
	dapm->bias_level = SND_SOC_BIAS_OFF;
2700 2701
	dapm->idle_bias_off = !driver->idle_bias_on;
	dapm->suspend_bias_off = driver->suspend_bias_off;
2702 2703 2704 2705
	if (driver->seq_notifier)
		dapm->seq_notifier = snd_soc_component_seq_notifier;
	if (driver->stream_event)
		dapm->stream_event = snd_soc_component_stream_event;
2706 2707
	if (driver->set_bias_level)
		dapm->set_bias_level = snd_soc_component_set_bias_level;
2708

2709 2710
	INIT_LIST_HEAD(&component->dai_list);
	mutex_init(&component->io_mutex);
2711

2712 2713
	return 0;
}
2714

2715
static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2716
{
2717 2718 2719 2720 2721 2722 2723
	int val_bytes = regmap_get_val_bytes(component->regmap);

	/* Errors are legitimate for non-integer byte multiples */
	if (val_bytes > 0)
		component->val_bytes = val_bytes;
}

2724 2725
#ifdef CONFIG_REGMAP

2726
/**
2727 2728
 * snd_soc_component_init_regmap() - Initialize regmap instance for the
 *                                   component
2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741
 * @component: The component for which to initialize the regmap instance
 * @regmap: The regmap instance that should be used by the component
 *
 * This function allows deferred assignment of the regmap instance that is
 * associated with the component. Only use this if the regmap instance is not
 * yet ready when the component is registered. The function must also be called
 * before the first IO attempt of the component.
 */
void snd_soc_component_init_regmap(struct snd_soc_component *component,
	struct regmap *regmap)
{
	component->regmap = regmap;
	snd_soc_component_setup_regmap(component);
2742
}
2743 2744 2745
EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);

/**
2746 2747
 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the
 *                                   component
2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761
 * @component: The component for which to de-initialize the regmap instance
 *
 * Calls regmap_exit() on the regmap instance associated to the component and
 * removes the regmap instance from the component.
 *
 * This function should only be used if snd_soc_component_init_regmap() was used
 * to initialize the regmap instance.
 */
void snd_soc_component_exit_regmap(struct snd_soc_component *component)
{
	regmap_exit(component->regmap);
	component->regmap = NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_component_exit_regmap);
2762

2763
#endif
2764

2765
static void snd_soc_component_add(struct snd_soc_component *component)
2766
{
2767 2768
	mutex_lock(&client_mutex);

2769
	if (!component->driver->write && !component->driver->read) {
2770
		if (!component->regmap)
2771 2772
			component->regmap = dev_get_regmap(component->dev,
							   NULL);
2773 2774 2775
		if (component->regmap)
			snd_soc_component_setup_regmap(component);
	}
2776

2777
	/* see for_each_component */
2778
	list_add(&component->list, &component_list);
2779
	INIT_LIST_HEAD(&component->dobj_list);
2780 2781

	mutex_unlock(&client_mutex);
2782
}
2783

2784 2785 2786 2787 2788
static void snd_soc_component_cleanup(struct snd_soc_component *component)
{
	snd_soc_unregister_dais(component);
	kfree(component->name);
}
2789

2790 2791
static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
{
2792 2793 2794
	struct snd_soc_card *card = component->card;

	if (card)
2795
		snd_soc_unbind_card(card, false);
2796

2797 2798
	list_del(&component->list);
}
2799

2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834
#define ENDIANNESS_MAP(name) \
	(SNDRV_PCM_FMTBIT_##name##LE | SNDRV_PCM_FMTBIT_##name##BE)
static u64 endianness_format_map[] = {
	ENDIANNESS_MAP(S16_),
	ENDIANNESS_MAP(U16_),
	ENDIANNESS_MAP(S24_),
	ENDIANNESS_MAP(U24_),
	ENDIANNESS_MAP(S32_),
	ENDIANNESS_MAP(U32_),
	ENDIANNESS_MAP(S24_3),
	ENDIANNESS_MAP(U24_3),
	ENDIANNESS_MAP(S20_3),
	ENDIANNESS_MAP(U20_3),
	ENDIANNESS_MAP(S18_3),
	ENDIANNESS_MAP(U18_3),
	ENDIANNESS_MAP(FLOAT_),
	ENDIANNESS_MAP(FLOAT64_),
	ENDIANNESS_MAP(IEC958_SUBFRAME_),
};

/*
 * Fix up the DAI formats for endianness: codecs don't actually see
 * the endianness of the data but we're using the CPU format
 * definitions which do need to include endianness so we ensure that
 * codec DAIs always have both big and little endian variants set.
 */
static void convert_endianness_formats(struct snd_soc_pcm_stream *stream)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(endianness_format_map); i++)
		if (stream->formats & endianness_format_map[i])
			stream->formats |= endianness_format_map[i];
}

2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846
static void snd_soc_try_rebind_card(void)
{
	struct snd_soc_card *card, *c;

	if (!list_empty(&unbind_card_list)) {
		list_for_each_entry_safe(card, c, &unbind_card_list, list) {
			if (!snd_soc_bind_card(card))
				list_del(&card->list);
		}
	}
}

2847 2848 2849 2850 2851
int snd_soc_add_component(struct device *dev,
			struct snd_soc_component *component,
			const struct snd_soc_component_driver *component_driver,
			struct snd_soc_dai_driver *dai_drv,
			int num_dai)
2852
{
2853
	int ret;
2854
	int i;
2855

2856
	ret = snd_soc_component_initialize(component, component_driver, dev);
2857 2858 2859
	if (ret)
		goto err_free;

2860 2861 2862 2863 2864 2865 2866
	if (component_driver->endianness) {
		for (i = 0; i < num_dai; i++) {
			convert_endianness_formats(&dai_drv[i].playback);
			convert_endianness_formats(&dai_drv[i].capture);
		}
	}

2867
	ret = snd_soc_register_dais(component, dai_drv, num_dai);
2868
	if (ret < 0) {
2869
		dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
2870 2871
		goto err_cleanup;
	}
2872

2873
	snd_soc_component_add(component);
2874
	snd_soc_try_rebind_card();
2875

2876
	return 0;
2877

2878
err_cleanup:
2879
	snd_soc_component_cleanup(component);
2880 2881
err_free:
	return ret;
2882
}
2883 2884 2885 2886 2887 2888 2889 2890 2891
EXPORT_SYMBOL_GPL(snd_soc_add_component);

int snd_soc_register_component(struct device *dev,
			const struct snd_soc_component_driver *component_driver,
			struct snd_soc_dai_driver *dai_drv,
			int num_dai)
{
	struct snd_soc_component *component;

2892
	component = devm_kzalloc(dev, sizeof(*component), GFP_KERNEL);
2893
	if (!component)
2894 2895 2896 2897 2898
		return -ENOMEM;

	return snd_soc_add_component(dev, component, component_driver,
				     dai_drv, num_dai);
}
2899
EXPORT_SYMBOL_GPL(snd_soc_register_component);
2900

2901
/**
2902 2903
 * snd_soc_unregister_component - Unregister all related component
 * from the ASoC core
2904
 *
2905
 * @dev: The device to unregister
2906
 */
2907
static int __snd_soc_unregister_component(struct device *dev)
2908
{
2909
	struct snd_soc_component *component;
2910
	int found = 0;
2911

2912
	mutex_lock(&client_mutex);
2913
	for_each_component(component) {
2914
		if (dev != component->dev)
2915 2916
			continue;

2917 2918
		snd_soc_tplg_component_remove(component,
					      SND_SOC_TPLG_INDEX_ALL);
2919 2920 2921
		snd_soc_component_del_unlocked(component);
		found = 1;
		break;
2922
	}
2923
	mutex_unlock(&client_mutex);
2924

2925
	if (found)
2926
		snd_soc_component_cleanup(component);
2927 2928 2929 2930 2931 2932

	return found;
}

void snd_soc_unregister_component(struct device *dev)
{
2933 2934
	while (__snd_soc_unregister_component(dev))
		;
2935 2936 2937
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_component);

2938 2939 2940 2941 2942 2943 2944 2945
struct snd_soc_component *snd_soc_lookup_component(struct device *dev,
						   const char *driver_name)
{
	struct snd_soc_component *component;
	struct snd_soc_component *ret;

	ret = NULL;
	mutex_lock(&client_mutex);
2946
	for_each_component(component) {
2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963
		if (dev != component->dev)
			continue;

		if (driver_name &&
		    (driver_name != component->driver->name) &&
		    (strcmp(component->driver->name, driver_name) != 0))
			continue;

		ret = component;
		break;
	}
	mutex_unlock(&client_mutex);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_lookup_component);

2964
/* Retrieve a card's name from device tree */
2965 2966
int snd_soc_of_parse_card_name(struct snd_soc_card *card,
			       const char *propname)
2967
{
2968
	struct device_node *np;
2969 2970
	int ret;

2971 2972 2973 2974 2975
	if (!card->dev) {
		pr_err("card->dev is not set before calling %s\n", __func__);
		return -EINVAL;
	}

2976
	np = card->dev->of_node;
2977

2978 2979 2980 2981 2982 2983 2984 2985
	ret = of_property_read_string_index(np, propname, 0, &card->name);
	/*
	 * EINVAL means the property does not exist. This is fine providing
	 * card->name was previously set, which is checked later in
	 * snd_soc_register_card.
	 */
	if (ret < 0 && ret != -EINVAL) {
		dev_err(card->dev,
2986
			"ASoC: Property '%s' could not be read: %d\n",
2987 2988 2989 2990 2991 2992
			propname, ret);
		return ret;
	}

	return 0;
}
2993
EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
2994

2995 2996 2997 2998 2999 3000 3001
static const struct snd_soc_dapm_widget simple_widgets[] = {
	SND_SOC_DAPM_MIC("Microphone", NULL),
	SND_SOC_DAPM_LINE("Line", NULL),
	SND_SOC_DAPM_HP("Headphone", NULL),
	SND_SOC_DAPM_SPK("Speaker", NULL),
};

3002
int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
3003 3004
					  const char *propname)
{
3005
	struct device_node *np = card->dev->of_node;
3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074
	struct snd_soc_dapm_widget *widgets;
	const char *template, *wname;
	int i, j, num_widgets, ret;

	num_widgets = of_property_count_strings(np, propname);
	if (num_widgets < 0) {
		dev_err(card->dev,
			"ASoC: Property '%s' does not exist\n",	propname);
		return -EINVAL;
	}
	if (num_widgets & 1) {
		dev_err(card->dev,
			"ASoC: Property '%s' length is not even\n", propname);
		return -EINVAL;
	}

	num_widgets /= 2;
	if (!num_widgets) {
		dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
			propname);
		return -EINVAL;
	}

	widgets = devm_kcalloc(card->dev, num_widgets, sizeof(*widgets),
			       GFP_KERNEL);
	if (!widgets) {
		dev_err(card->dev,
			"ASoC: Could not allocate memory for widgets\n");
		return -ENOMEM;
	}

	for (i = 0; i < num_widgets; i++) {
		ret = of_property_read_string_index(np, propname,
			2 * i, &template);
		if (ret) {
			dev_err(card->dev,
				"ASoC: Property '%s' index %d read error:%d\n",
				propname, 2 * i, ret);
			return -EINVAL;
		}

		for (j = 0; j < ARRAY_SIZE(simple_widgets); j++) {
			if (!strncmp(template, simple_widgets[j].name,
				     strlen(simple_widgets[j].name))) {
				widgets[i] = simple_widgets[j];
				break;
			}
		}

		if (j >= ARRAY_SIZE(simple_widgets)) {
			dev_err(card->dev,
				"ASoC: DAPM widget '%s' is not supported\n",
				template);
			return -EINVAL;
		}

		ret = of_property_read_string_index(np, propname,
						    (2 * i) + 1,
						    &wname);
		if (ret) {
			dev_err(card->dev,
				"ASoC: Property '%s' index %d read error:%d\n",
				propname, (2 * i) + 1, ret);
			return -EINVAL;
		}

		widgets[i].name = wname;
	}

3075 3076
	card->of_dapm_widgets = widgets;
	card->num_of_dapm_widgets = num_widgets;
3077 3078 3079

	return 0;
}
3080
EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);
3081

3082 3083 3084
int snd_soc_of_get_slot_mask(struct device_node *np,
			     const char *prop_name,
			     unsigned int *mask)
3085 3086
{
	u32 val;
3087
	const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098
	int i;

	if (!of_slot_mask)
		return 0;
	val /= sizeof(u32);
	for (i = 0; i < val; i++)
		if (be32_to_cpup(&of_slot_mask[i]))
			*mask |= (1 << i);

	return val;
}
3099
EXPORT_SYMBOL_GPL(snd_soc_of_get_slot_mask);
3100

3101
int snd_soc_of_parse_tdm_slot(struct device_node *np,
3102 3103
			      unsigned int *tx_mask,
			      unsigned int *rx_mask,
3104 3105 3106 3107 3108 3109
			      unsigned int *slots,
			      unsigned int *slot_width)
{
	u32 val;
	int ret;

3110 3111 3112 3113 3114
	if (tx_mask)
		snd_soc_of_get_slot_mask(np, "dai-tdm-slot-tx-mask", tx_mask);
	if (rx_mask)
		snd_soc_of_get_slot_mask(np, "dai-tdm-slot-rx-mask", rx_mask);

3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136
	if (of_property_read_bool(np, "dai-tdm-slot-num")) {
		ret = of_property_read_u32(np, "dai-tdm-slot-num", &val);
		if (ret)
			return ret;

		if (slots)
			*slots = val;
	}

	if (of_property_read_bool(np, "dai-tdm-slot-width")) {
		ret = of_property_read_u32(np, "dai-tdm-slot-width", &val);
		if (ret)
			return ret;

		if (slot_width)
			*slot_width = val;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_of_parse_tdm_slot);

3137 3138 3139 3140
void snd_soc_of_parse_node_prefix(struct device_node *np,
				  struct snd_soc_codec_conf *codec_conf,
				  struct device_node *of_node,
				  const char *propname)
3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153
{
	const char *str;
	int ret;

	ret = of_property_read_string(np, propname, &str);
	if (ret < 0) {
		/* no prefix is not error */
		return;
	}

	codec_conf->of_node	= of_node;
	codec_conf->name_prefix	= str;
}
3154
EXPORT_SYMBOL_GPL(snd_soc_of_parse_node_prefix);
3155

3156
int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
3157 3158
				   const char *propname)
{
3159
	struct device_node *np = card->dev->of_node;
3160
	int num_routes;
3161 3162 3163 3164
	struct snd_soc_dapm_route *routes;
	int i, ret;

	num_routes = of_property_count_strings(np, propname);
3165
	if (num_routes < 0 || num_routes & 1) {
3166 3167 3168
		dev_err(card->dev,
			"ASoC: Property '%s' does not exist or its length is not even\n",
			propname);
3169 3170 3171 3172
		return -EINVAL;
	}
	num_routes /= 2;
	if (!num_routes) {
3173
		dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3174 3175 3176 3177
			propname);
		return -EINVAL;
	}

3178
	routes = devm_kcalloc(card->dev, num_routes, sizeof(*routes),
3179 3180 3181
			      GFP_KERNEL);
	if (!routes) {
		dev_err(card->dev,
3182
			"ASoC: Could not allocate DAPM route table\n");
3183 3184 3185 3186 3187
		return -EINVAL;
	}

	for (i = 0; i < num_routes; i++) {
		ret = of_property_read_string_index(np, propname,
3188
			2 * i, &routes[i].sink);
3189
		if (ret) {
3190 3191 3192
			dev_err(card->dev,
				"ASoC: Property '%s' index %d could not be read: %d\n",
				propname, 2 * i, ret);
3193 3194 3195
			return -EINVAL;
		}
		ret = of_property_read_string_index(np, propname,
3196
			(2 * i) + 1, &routes[i].source);
3197 3198
		if (ret) {
			dev_err(card->dev,
3199 3200
				"ASoC: Property '%s' index %d could not be read: %d\n",
				propname, (2 * i) + 1, ret);
3201 3202 3203 3204
			return -EINVAL;
		}
	}

3205 3206
	card->num_of_dapm_routes = num_routes;
	card->of_dapm_routes = routes;
3207 3208 3209

	return 0;
}
3210
EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
3211

3212
unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3213 3214 3215
				     const char *prefix,
				     struct device_node **bitclkmaster,
				     struct device_node **framemaster)
3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240
{
	int ret, i;
	char prop[128];
	unsigned int format = 0;
	int bit, frame;
	const char *str;
	struct {
		char *name;
		unsigned int val;
	} of_fmt_table[] = {
		{ "i2s",	SND_SOC_DAIFMT_I2S },
		{ "right_j",	SND_SOC_DAIFMT_RIGHT_J },
		{ "left_j",	SND_SOC_DAIFMT_LEFT_J },
		{ "dsp_a",	SND_SOC_DAIFMT_DSP_A },
		{ "dsp_b",	SND_SOC_DAIFMT_DSP_B },
		{ "ac97",	SND_SOC_DAIFMT_AC97 },
		{ "pdm",	SND_SOC_DAIFMT_PDM},
		{ "msb",	SND_SOC_DAIFMT_MSB },
		{ "lsb",	SND_SOC_DAIFMT_LSB },
	};

	if (!prefix)
		prefix = "";

	/*
3241 3242
	 * check "dai-format = xxx"
	 * or    "[prefix]format = xxx"
3243 3244
	 * SND_SOC_DAIFMT_FORMAT_MASK area
	 */
3245 3246 3247 3248 3249
	ret = of_property_read_string(np, "dai-format", &str);
	if (ret < 0) {
		snprintf(prop, sizeof(prop), "%sformat", prefix);
		ret = of_property_read_string(np, prop, &str);
	}
3250 3251 3252 3253 3254 3255 3256 3257 3258 3259
	if (ret == 0) {
		for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
			if (strcmp(str, of_fmt_table[i].name) == 0) {
				format |= of_fmt_table[i].val;
				break;
			}
		}
	}

	/*
3260
	 * check "[prefix]continuous-clock"
3261 3262
	 * SND_SOC_DAIFMT_CLOCK_MASK area
	 */
3263
	snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
J
Julia Lawall 已提交
3264
	if (of_property_read_bool(np, prop))
3265 3266 3267
		format |= SND_SOC_DAIFMT_CONT;
	else
		format |= SND_SOC_DAIFMT_GATED;
3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301

	/*
	 * check "[prefix]bitclock-inversion"
	 * check "[prefix]frame-inversion"
	 * SND_SOC_DAIFMT_INV_MASK area
	 */
	snprintf(prop, sizeof(prop), "%sbitclock-inversion", prefix);
	bit = !!of_get_property(np, prop, NULL);

	snprintf(prop, sizeof(prop), "%sframe-inversion", prefix);
	frame = !!of_get_property(np, prop, NULL);

	switch ((bit << 4) + frame) {
	case 0x11:
		format |= SND_SOC_DAIFMT_IB_IF;
		break;
	case 0x10:
		format |= SND_SOC_DAIFMT_IB_NF;
		break;
	case 0x01:
		format |= SND_SOC_DAIFMT_NB_IF;
		break;
	default:
		/* SND_SOC_DAIFMT_NB_NF is default */
		break;
	}

	/*
	 * check "[prefix]bitclock-master"
	 * check "[prefix]frame-master"
	 * SND_SOC_DAIFMT_MASTER_MASK area
	 */
	snprintf(prop, sizeof(prop), "%sbitclock-master", prefix);
	bit = !!of_get_property(np, prop, NULL);
3302 3303
	if (bit && bitclkmaster)
		*bitclkmaster = of_parse_phandle(np, prop, 0);
3304 3305 3306

	snprintf(prop, sizeof(prop), "%sframe-master", prefix);
	frame = !!of_get_property(np, prop, NULL);
3307 3308
	if (frame && framemaster)
		*framemaster = of_parse_phandle(np, prop, 0);
3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328

	switch ((bit << 4) + frame) {
	case 0x11:
		format |= SND_SOC_DAIFMT_CBM_CFM;
		break;
	case 0x10:
		format |= SND_SOC_DAIFMT_CBM_CFS;
		break;
	case 0x01:
		format |= SND_SOC_DAIFMT_CBS_CFM;
		break;
	default:
		format |= SND_SOC_DAIFMT_CBS_CFS;
		break;
	}

	return format;
}
EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);

3329 3330
int snd_soc_get_dai_id(struct device_node *ep)
{
3331
	struct snd_soc_component *component;
3332
	struct snd_soc_dai_link_component dlc;
3333 3334
	int ret;

3335 3336
	dlc.of_node	= of_graph_get_port_parent(ep);
	dlc.name	= NULL;
3337 3338 3339 3340 3341 3342 3343 3344
	/*
	 * For example HDMI case, HDMI has video/sound port,
	 * but ALSA SoC needs sound port number only.
	 * Thus counting HDMI DT port/endpoint doesn't work.
	 * Then, it should have .of_xlate_dai_id
	 */
	ret = -ENOTSUPP;
	mutex_lock(&client_mutex);
3345
	component = soc_find_component(&dlc);
3346 3347 3348
	if (component &&
	    component->driver->of_xlate_dai_id)
		ret = component->driver->of_xlate_dai_id(component, ep);
3349 3350
	mutex_unlock(&client_mutex);

3351
	of_node_put(dlc.of_node);
3352

3353 3354 3355 3356
	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);

3357
int snd_soc_get_dai_name(struct of_phandle_args *args,
3358
				const char **dai_name)
3359 3360
{
	struct snd_soc_component *pos;
3361
	struct device_node *component_of_node;
3362
	int ret = -EPROBE_DEFER;
3363 3364

	mutex_lock(&client_mutex);
3365
	for_each_component(pos) {
3366
		component_of_node = soc_component_to_node(pos);
3367 3368

		if (component_of_node != args->np)
3369 3370
			continue;

3371
		if (pos->driver->of_xlate_dai_name) {
3372 3373 3374
			ret = pos->driver->of_xlate_dai_name(pos,
							     args,
							     dai_name);
3375
		} else {
3376
			struct snd_soc_dai *dai;
3377 3378
			int id = -1;

3379
			switch (args->args_count) {
3380 3381 3382 3383
			case 0:
				id = 0; /* same as dai_drv[0] */
				break;
			case 1:
3384
				id = args->args[0];
3385 3386 3387 3388 3389 3390 3391 3392
				break;
			default:
				/* not supported */
				break;
			}

			if (id < 0 || id >= pos->num_dai) {
				ret = -EINVAL;
3393
				continue;
3394
			}
X
Xiubo Li 已提交
3395 3396 3397

			ret = 0;

3398
			/* find target DAI */
3399
			for_each_component_dais(pos, dai) {
3400 3401 3402 3403 3404 3405
				if (id == 0)
					break;
				id--;
			}

			*dai_name = dai->driver->name;
X
Xiubo Li 已提交
3406 3407
			if (!*dai_name)
				*dai_name = pos->name;
3408 3409 3410 3411 3412
		}

		break;
	}
	mutex_unlock(&client_mutex);
3413 3414
	return ret;
}
3415
EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428

int snd_soc_of_get_dai_name(struct device_node *of_node,
			    const char **dai_name)
{
	struct of_phandle_args args;
	int ret;

	ret = of_parse_phandle_with_args(of_node, "sound-dai",
					 "#sound-dai-cells", 0, &args);
	if (ret)
		return ret;

	ret = snd_soc_get_dai_name(&args, dai_name);
3429 3430 3431 3432 3433 3434 3435

	of_node_put(args.np);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);

3436 3437 3438 3439 3440 3441 3442 3443
/*
 * snd_soc_of_put_dai_link_codecs - Dereference device nodes in the codecs array
 * @dai_link: DAI link
 *
 * Dereference device nodes acquired by snd_soc_of_get_dai_link_codecs().
 */
void snd_soc_of_put_dai_link_codecs(struct snd_soc_dai_link *dai_link)
{
3444
	struct snd_soc_dai_link_component *component;
3445 3446
	int index;

3447
	for_each_link_codecs(dai_link, index, component) {
3448 3449 3450 3451 3452 3453 3454 3455
		if (!component->of_node)
			break;
		of_node_put(component->of_node);
		component->of_node = NULL;
	}
}
EXPORT_SYMBOL_GPL(snd_soc_of_put_dai_link_codecs);

3456 3457 3458 3459 3460 3461 3462 3463 3464
/*
 * snd_soc_of_get_dai_link_codecs - Parse a list of CODECs in the devicetree
 * @dev: Card device
 * @of_node: Device node
 * @dai_link: DAI link
 *
 * Builds an array of CODEC DAI components from the DAI link property
 * 'sound-dai'.
 * The array is set in the DAI link and the number of DAIs is set accordingly.
3465 3466
 * The device nodes in the array (of_node) must be dereferenced by calling
 * snd_soc_of_put_dai_link_codecs() on @dai_link.
3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489
 *
 * Returns 0 for success
 */
int snd_soc_of_get_dai_link_codecs(struct device *dev,
				   struct device_node *of_node,
				   struct snd_soc_dai_link *dai_link)
{
	struct of_phandle_args args;
	struct snd_soc_dai_link_component *component;
	char *name;
	int index, num_codecs, ret;

	/* Count the number of CODECs */
	name = "sound-dai";
	num_codecs = of_count_phandle_with_args(of_node, name,
						"#sound-dai-cells");
	if (num_codecs <= 0) {
		if (num_codecs == -ENOENT)
			dev_err(dev, "No 'sound-dai' property\n");
		else
			dev_err(dev, "Bad phandle in 'sound-dai'\n");
		return num_codecs;
	}
3490 3491
	component = devm_kcalloc(dev,
				 num_codecs, sizeof(*component),
3492 3493 3494 3495 3496 3497 3498
				 GFP_KERNEL);
	if (!component)
		return -ENOMEM;
	dai_link->codecs = component;
	dai_link->num_codecs = num_codecs;

	/* Parse the list */
3499
	for_each_link_codecs(dai_link, index, component) {
3500 3501
		ret = of_parse_phandle_with_args(of_node, name,
						 "#sound-dai-cells",
3502
						 index, &args);
3503 3504 3505 3506 3507 3508 3509 3510 3511
		if (ret)
			goto err;
		component->of_node = args.np;
		ret = snd_soc_get_dai_name(&args, &component->dai_name);
		if (ret < 0)
			goto err;
	}
	return 0;
err:
3512
	snd_soc_of_put_dai_link_codecs(dai_link);
3513 3514 3515 3516 3517 3518
	dai_link->codecs = NULL;
	dai_link->num_codecs = 0;
	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);

3519
static int __init snd_soc_init(void)
F
Frank Mandarino 已提交
3520
{
3521
	snd_soc_debugfs_init();
3522 3523
	snd_soc_util_init();

F
Frank Mandarino 已提交
3524 3525
	return platform_driver_register(&soc_driver);
}
3526
module_init(snd_soc_init);
F
Frank Mandarino 已提交
3527

M
Mark Brown 已提交
3528
static void __exit snd_soc_exit(void)
F
Frank Mandarino 已提交
3529
{
3530
	snd_soc_util_exit();
3531
	snd_soc_debugfs_exit();
3532

3533
	platform_driver_unregister(&soc_driver);
F
Frank Mandarino 已提交
3534 3535 3536 3537
}
module_exit(snd_soc_exit);

/* Module information */
3538
MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
F
Frank Mandarino 已提交
3539 3540
MODULE_DESCRIPTION("ALSA SoC Core");
MODULE_LICENSE("GPL");
3541
MODULE_ALIAS("platform:soc-audio");