soc-core.c 101.7 KB
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/*
 * soc-core.c  --  ALSA SoC Audio Layer
 *
 * Copyright 2005 Wolfson Microelectronics PLC.
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 * Copyright 2005 Openedhand Ltd.
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 * Copyright (C) 2010 Slimlogic Ltd.
 * Copyright (C) 2010 Texas Instruments Inc.
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 *
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 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
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 *         with code, comments and ideas from :-
 *         Richard Purdie <richard@openedhand.com>
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 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  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
 */

#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 <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(platform_list);
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static LIST_HEAD(codec_list);
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static LIST_HEAD(component_list);
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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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/* returns the minimum number of bytes needed to represent
 * a particular given value */
static int min_bytes_needed(unsigned long val)
{
	int c = 0;
	int i;

	for (i = (sizeof val * 8) - 1; i >= 0; --i, ++c)
		if (val & (1UL << i))
			break;
	c = (sizeof val * 8) - c;
	if (!c || (c % 8))
		c = (c + 8) / 8;
	else
		c /= 8;
	return c;
}

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/* fill buf which is 'len' bytes with a formatted
 * string of the form 'reg: value\n' */
static int format_register_str(struct snd_soc_codec *codec,
			       unsigned int reg, char *buf, size_t len)
{
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	int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
	int regsize = codec->driver->reg_word_size * 2;
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	int ret;

	/* +2 for ': ' and + 1 for '\n' */
	if (wordsize + regsize + 2 + 1 != len)
		return -EINVAL;

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	sprintf(buf, "%.*x: ", wordsize, reg);
	buf += wordsize + 2;
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	ret = snd_soc_read(codec, reg);
	if (ret < 0)
		memset(buf, 'X', regsize);
	else
		sprintf(buf, "%.*x", regsize, ret);
	buf[regsize] = '\n';
	/* no NUL-termination needed */
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	return 0;
}

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/* codec register dump */
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static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf,
				  size_t count, loff_t pos)
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{
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	int i, step = 1;
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	int wordsize, regsize;
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	int len;
	size_t total = 0;
	loff_t p = 0;
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	wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
	regsize = codec->driver->reg_word_size * 2;
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	len = wordsize + regsize + 2 + 1;

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	if (!codec->driver->reg_cache_size)
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		return 0;

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	if (codec->driver->reg_cache_step)
		step = codec->driver->reg_cache_step;
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	for (i = 0; i < codec->driver->reg_cache_size; i += step) {
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		/* only support larger than PAGE_SIZE bytes debugfs
		 * entries for the default case */
		if (p >= pos) {
			if (total + len >= count - 1)
				break;
			format_register_str(codec, i, buf + total, len);
			total += len;
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		}
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		p += len;
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	}

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	total = min(total, count - 1);
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	return total;
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}
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static ssize_t codec_reg_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 soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
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}

static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);

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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_codec_reg.attr,
	&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 */
	return rtd->codec ? attr->mode : 0; /* enabled only with codec */
}

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

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

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

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#ifdef CONFIG_DEBUG_FS
static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
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				   size_t count, loff_t *ppos)
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{
	ssize_t ret;
	struct snd_soc_codec *codec = file->private_data;
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	char *buf;

	if (*ppos < 0 || !count)
		return -EINVAL;

	buf = kmalloc(count, GFP_KERNEL);
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	if (!buf)
		return -ENOMEM;
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	ret = soc_codec_reg_show(codec, buf, count, *ppos);
	if (ret >= 0) {
		if (copy_to_user(user_buf, buf, ret)) {
			kfree(buf);
			return -EFAULT;
		}
		*ppos += ret;
	}

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	kfree(buf);
	return ret;
}

static ssize_t codec_reg_write_file(struct file *file,
		const char __user *user_buf, size_t count, loff_t *ppos)
{
	char buf[32];
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	size_t buf_size;
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	char *start = buf;
	unsigned long reg, value;
	struct snd_soc_codec *codec = file->private_data;
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	int ret;
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	buf_size = min(count, (sizeof(buf)-1));
	if (copy_from_user(buf, user_buf, buf_size))
		return -EFAULT;
	buf[buf_size] = 0;

	while (*start == ' ')
		start++;
	reg = simple_strtoul(start, &start, 16);
	while (*start == ' ')
		start++;
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	ret = kstrtoul(start, 16, &value);
	if (ret)
		return ret;
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	/* Userspace has been fiddling around behind the kernel's back */
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	add_taint(TAINT_USER, LOCKDEP_NOW_UNRELIABLE);
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	snd_soc_write(codec, reg, value);
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	return buf_size;
}

static const struct file_operations codec_reg_fops = {
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	.open = simple_open,
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	.read = codec_reg_read_file,
	.write = codec_reg_write_file,
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	.llseek = default_llseek,
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};

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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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	if (!component->debugfs_root) {
		dev_warn(component->dev,
			"ASoC: Failed to create component debugfs directory\n");
		return;
	}
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	snd_soc_dapm_debugfs_init(snd_soc_component_get_dapm(component),
		component->debugfs_root);
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	if (component->init_debugfs)
		component->init_debugfs(component);
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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 void soc_init_codec_debugfs(struct snd_soc_component *component)
{
	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
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	codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
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						 codec->component.debugfs_root,
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						 codec, &codec_reg_fops);
	if (!codec->debugfs_reg)
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		dev_warn(codec->dev,
			"ASoC: Failed to create codec register debugfs file\n");
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}

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static ssize_t codec_list_read_file(struct file *file, char __user *user_buf,
				    size_t count, loff_t *ppos)
{
	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
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	ssize_t len, ret = 0;
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	struct snd_soc_codec *codec;

	if (!buf)
		return -ENOMEM;

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	mutex_lock(&client_mutex);

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	list_for_each_entry(codec, &codec_list, list) {
		len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
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			       codec->component.name);
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		if (len >= 0)
			ret += len;
		if (ret > PAGE_SIZE) {
			ret = PAGE_SIZE;
			break;
		}
	}
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	mutex_unlock(&client_mutex);

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	if (ret >= 0)
		ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);

	kfree(buf);

	return ret;
}

static const struct file_operations codec_list_fops = {
	.read = codec_list_read_file,
	.llseek = default_llseek,/* read accesses f_pos */
};

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static ssize_t dai_list_read_file(struct file *file, char __user *user_buf,
				  size_t count, loff_t *ppos)
{
	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
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	ssize_t len, ret = 0;
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	struct snd_soc_component *component;
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	struct snd_soc_dai *dai;

	if (!buf)
		return -ENOMEM;

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	mutex_lock(&client_mutex);

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	list_for_each_entry(component, &component_list, list) {
		list_for_each_entry(dai, &component->dai_list, list) {
			len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
				dai->name);
			if (len >= 0)
				ret += len;
			if (ret > PAGE_SIZE) {
				ret = PAGE_SIZE;
				break;
			}
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		}
	}
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	mutex_unlock(&client_mutex);

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	ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
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	kfree(buf);

	return ret;
}

static const struct file_operations dai_list_fops = {
	.read = dai_list_read_file,
	.llseek = default_llseek,/* read accesses f_pos */
};

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static ssize_t platform_list_read_file(struct file *file,
				       char __user *user_buf,
				       size_t count, loff_t *ppos)
{
	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
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	ssize_t len, ret = 0;
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	struct snd_soc_platform *platform;

	if (!buf)
		return -ENOMEM;

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	mutex_lock(&client_mutex);

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	list_for_each_entry(platform, &platform_list, list) {
		len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
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			       platform->component.name);
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		if (len >= 0)
			ret += len;
		if (ret > PAGE_SIZE) {
			ret = PAGE_SIZE;
			break;
		}
	}
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	mutex_unlock(&client_mutex);

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	ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
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	kfree(buf);

	return ret;
}

static const struct file_operations platform_list_fops = {
	.read = platform_list_read_file,
	.llseek = default_llseek,/* read accesses f_pos */
};

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static void soc_init_card_debugfs(struct snd_soc_card *card)
{
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	if (!snd_soc_debugfs_root)
		return;

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	card->debugfs_card_root = debugfs_create_dir(card->name,
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						     snd_soc_debugfs_root);
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	if (!card->debugfs_card_root) {
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		dev_warn(card->dev,
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			 "ASoC: Failed to create card debugfs directory\n");
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		return;
	}

	card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
						    card->debugfs_card_root,
						    &card->pop_time);
	if (!card->debugfs_pop_time)
		dev_warn(card->dev,
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		       "ASoC: Failed to create pop time debugfs file\n");
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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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static void snd_soc_debugfs_init(void)
{
	snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
	if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
		pr_warn("ASoC: Failed to create debugfs directory\n");
		snd_soc_debugfs_root = NULL;
		return;
	}

	if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
				 &codec_list_fops))
		pr_warn("ASoC: Failed to create CODEC list debugfs file\n");

	if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
				 &dai_list_fops))
		pr_warn("ASoC: Failed to create DAI list debugfs file\n");

	if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
				 &platform_list_fops))
		pr_warn("ASoC: Failed to create platform list debugfs file\n");
}

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

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#else

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#define soc_init_codec_debugfs NULL
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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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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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	list_for_each_entry(rtd, &card->rtd_list, list) {
		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 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;

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

	return rtd;
}

static void soc_free_pcm_runtime(struct snd_soc_pcm_runtime *rtd)
{
	if (rtd && rtd->codec_dais)
		kfree(rtd->codec_dais);
	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;

	list_for_each_entry_safe(rtd, _rtd, &card->rtd_list, list) {
		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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	list_for_each_entry(rtd, &card->rtd_list, list) {
		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 codec2codec_close_delayed_work(struct work_struct *work)
{
	/* Currently nothing to do for c2c links
	 * Since c2c links are internal nodes in the DAPM graph and
	 * don't interface with the outside world or application layer
	 * we don't have to do any special handling on close.
	 */
}

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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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	snd_power_lock(card->snd_card);
	snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
	snd_power_unlock(card->snd_card);
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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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	list_for_each_entry(rtd, &card->rtd_list, list) {
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		if (rtd->dai_link->ignore_suspend)
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			continue;

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		for (i = 0; i < rtd->num_codecs; i++) {
			struct snd_soc_dai *dai = rtd->codec_dais[i];
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			struct snd_soc_dai_driver *drv = dai->driver;

			if (drv->ops->digital_mute && dai->playback_active)
				drv->ops->digital_mute(dai, 1);
		}
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	}

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	/* suspend all pcms */
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	list_for_each_entry(rtd, &card->rtd_list, list) {
		if (rtd->dai_link->ignore_suspend)
665 666
			continue;

667
		snd_pcm_suspend_all(rtd->pcm);
668
	}
669

670
	if (card->suspend_pre)
671
		card->suspend_pre(card);
F
Frank Mandarino 已提交
672

673 674
	list_for_each_entry(rtd, &card->rtd_list, list) {
		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
675

676
		if (rtd->dai_link->ignore_suspend)
677 678
			continue;

679
		if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
680
			cpu_dai->driver->suspend(cpu_dai);
F
Frank Mandarino 已提交
681 682
	}

683
	/* close any waiting streams */
684 685
	list_for_each_entry(rtd, &card->rtd_list, list)
		flush_delayed_work(&rtd->delayed_work);
F
Frank Mandarino 已提交
686

687
	list_for_each_entry(rtd, &card->rtd_list, list) {
688

689
		if (rtd->dai_link->ignore_suspend)
690 691
			continue;

692
		snd_soc_dapm_stream_event(rtd,
693 694
					  SNDRV_PCM_STREAM_PLAYBACK,
					  SND_SOC_DAPM_STREAM_SUSPEND);
695

696
		snd_soc_dapm_stream_event(rtd,
697 698
					  SNDRV_PCM_STREAM_CAPTURE,
					  SND_SOC_DAPM_STREAM_SUSPEND);
F
Frank Mandarino 已提交
699 700
	}

701 702
	/* Recheck all endpoints too, their state is affected by suspend */
	dapm_mark_endpoints_dirty(card);
703 704
	snd_soc_dapm_sync(&card->dapm);

705
	/* suspend all COMPONENTs */
706 707 708
	list_for_each_entry(component, &card->component_dev_list, card_list) {
		struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);

709
		/* If there are paths active then the COMPONENT will be held with
710
		 * bias _ON and should not be suspended. */
711
		if (!component->suspended) {
712
			switch (snd_soc_dapm_get_bias_level(dapm)) {
713
			case SND_SOC_BIAS_STANDBY:
714
				/*
715
				 * If the COMPONENT is capable of idle
716 717 718 719
				 * bias off then being in STANDBY
				 * means it's doing something,
				 * otherwise fall through.
				 */
720
				if (dapm->idle_bias_off) {
721
					dev_dbg(component->dev,
722
						"ASoC: idle_bias_off CODEC on over suspend\n");
723 724
					break;
				}
725

726
			case SND_SOC_BIAS_OFF:
727 728 729 730 731
				if (component->suspend)
					component->suspend(component);
				component->suspended = 1;
				if (component->regmap)
					regcache_mark_dirty(component->regmap);
732
				/* deactivate pins to sleep state */
733
				pinctrl_pm_select_sleep_state(component->dev);
734 735
				break;
			default:
736 737
				dev_dbg(component->dev,
					"ASoC: COMPONENT is on over suspend\n");
738 739
				break;
			}
740 741
		}
	}
F
Frank Mandarino 已提交
742

743 744
	list_for_each_entry(rtd, &card->rtd_list, list) {
		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
745

746
		if (rtd->dai_link->ignore_suspend)
747 748
			continue;

749
		if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
750
			cpu_dai->driver->suspend(cpu_dai);
751 752 753

		/* deactivate pins to sleep state */
		pinctrl_pm_select_sleep_state(cpu_dai->dev);
F
Frank Mandarino 已提交
754 755
	}

756
	if (card->suspend_post)
757
		card->suspend_post(card);
F
Frank Mandarino 已提交
758 759 760

	return 0;
}
761
EXPORT_SYMBOL_GPL(snd_soc_suspend);
F
Frank Mandarino 已提交
762

763 764 765 766
/* deferred resume work, so resume can complete before we finished
 * setting our codec back up, which can be very slow on I2C
 */
static void soc_resume_deferred(struct work_struct *work)
F
Frank Mandarino 已提交
767
{
768 769
	struct snd_soc_card *card =
			container_of(work, struct snd_soc_card, deferred_resume_work);
770
	struct snd_soc_pcm_runtime *rtd;
771
	struct snd_soc_component *component;
772
	int i;
F
Frank Mandarino 已提交
773

774 775 776 777
	/* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
	 * so userspace apps are blocked from touching us
	 */

778
	dev_dbg(card->dev, "ASoC: starting resume work\n");
779

780
	/* Bring us up into D2 so that DAPM starts enabling things */
781
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
782

783
	if (card->resume_pre)
784
		card->resume_pre(card);
F
Frank Mandarino 已提交
785

786
	/* resume control bus DAIs */
787 788
	list_for_each_entry(rtd, &card->rtd_list, list) {
		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
789

790
		if (rtd->dai_link->ignore_suspend)
791 792
			continue;

793
		if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
794 795 796
			cpu_dai->driver->resume(cpu_dai);
	}

797
	list_for_each_entry(component, &card->component_dev_list, card_list) {
798 799 800 801
		if (component->suspended) {
			if (component->resume)
				component->resume(component);
			component->suspended = 0;
802 803
		}
	}
F
Frank Mandarino 已提交
804

805
	list_for_each_entry(rtd, &card->rtd_list, list) {
806

807
		if (rtd->dai_link->ignore_suspend)
808 809
			continue;

810
		snd_soc_dapm_stream_event(rtd,
811
					  SNDRV_PCM_STREAM_PLAYBACK,
812
					  SND_SOC_DAPM_STREAM_RESUME);
813

814
		snd_soc_dapm_stream_event(rtd,
815
					  SNDRV_PCM_STREAM_CAPTURE,
816
					  SND_SOC_DAPM_STREAM_RESUME);
F
Frank Mandarino 已提交
817 818
	}

819
	/* unmute any active DACs */
820
	list_for_each_entry(rtd, &card->rtd_list, list) {
821

822
		if (rtd->dai_link->ignore_suspend)
823 824
			continue;

825 826
		for (i = 0; i < rtd->num_codecs; i++) {
			struct snd_soc_dai *dai = rtd->codec_dais[i];
827 828 829 830 831
			struct snd_soc_dai_driver *drv = dai->driver;

			if (drv->ops->digital_mute && dai->playback_active)
				drv->ops->digital_mute(dai, 0);
		}
F
Frank Mandarino 已提交
832 833
	}

834 835
	list_for_each_entry(rtd, &card->rtd_list, list) {
		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
836

837
		if (rtd->dai_link->ignore_suspend)
838 839
			continue;

840
		if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
841
			cpu_dai->driver->resume(cpu_dai);
F
Frank Mandarino 已提交
842 843
	}

844
	if (card->resume_post)
845
		card->resume_post(card);
F
Frank Mandarino 已提交
846

847
	dev_dbg(card->dev, "ASoC: resume work completed\n");
848

849 850
	/* Recheck all endpoints too, their state is affected by suspend */
	dapm_mark_endpoints_dirty(card);
851
	snd_soc_dapm_sync(&card->dapm);
852 853 854

	/* userspace can access us now we are back as we were before */
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
855 856 857
}

/* powers up audio subsystem after a suspend */
858
int snd_soc_resume(struct device *dev)
859
{
860
	struct snd_soc_card *card = dev_get_drvdata(dev);
861
	bool bus_control = false;
862
	struct snd_soc_pcm_runtime *rtd;
863

864 865
	/* If the card is not initialized yet there is nothing to do */
	if (!card->instantiated)
866 867
		return 0;

868
	/* activate pins from sleep state */
869
	list_for_each_entry(rtd, &card->rtd_list, list) {
870 871 872 873
		struct snd_soc_dai **codec_dais = rtd->codec_dais;
		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
		int j;

874 875
		if (cpu_dai->active)
			pinctrl_pm_select_default_state(cpu_dai->dev);
876 877 878 879 880 881

		for (j = 0; j < rtd->num_codecs; j++) {
			struct snd_soc_dai *codec_dai = codec_dais[j];
			if (codec_dai->active)
				pinctrl_pm_select_default_state(codec_dai->dev);
		}
882 883
	}

884 885 886 887
	/*
	 * 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
888 889
	 * due to I/O costs and anti-pop so handle them out of line.
	 */
890 891
	list_for_each_entry(rtd, &card->rtd_list, list) {
		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
892
		bus_control |= cpu_dai->driver->bus_control;
893
	}
894 895
	if (bus_control) {
		dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
896 897
		soc_resume_deferred(&card->deferred_resume_work);
	} else {
898
		dev_dbg(dev, "ASoC: Scheduling resume work\n");
899
		if (!schedule_work(&card->deferred_resume_work))
900
			dev_err(dev, "ASoC: resume work item may be lost\n");
901
	}
902

F
Frank Mandarino 已提交
903 904
	return 0;
}
905
EXPORT_SYMBOL_GPL(snd_soc_resume);
F
Frank Mandarino 已提交
906
#else
907 908
#define snd_soc_suspend NULL
#define snd_soc_resume NULL
F
Frank Mandarino 已提交
909 910
#endif

911
static const struct snd_soc_dai_ops null_dai_ops = {
912 913
};

914 915
static struct snd_soc_component *soc_find_component(
	const struct device_node *of_node, const char *name)
916
{
917
	struct snd_soc_component *component;
918

919 920
	lockdep_assert_held(&client_mutex);

921 922 923 924 925 926
	list_for_each_entry(component, &component_list, list) {
		if (of_node) {
			if (component->dev->of_node == of_node)
				return component;
		} else if (strcmp(component->name, name) == 0) {
			return component;
927 928 929 930 931 932
		}
	}

	return NULL;
}

933 934 935 936 937 938 939 940 941 942 943
/**
 * snd_soc_find_dai - Find a registered DAI
 *
 * @dlc: name of the DAI and optional component info to match
 *
 * This function will search all regsitered components and their DAIs to
 * 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
944
struct snd_soc_dai *snd_soc_find_dai(
945
	const struct snd_soc_dai_link_component *dlc)
946
{
947 948
	struct snd_soc_component *component;
	struct snd_soc_dai *dai;
949
	struct device_node *component_of_node;
950

951 952
	lockdep_assert_held(&client_mutex);

953 954
	/* Find CPU DAI from registered DAIs*/
	list_for_each_entry(component, &component_list, list) {
955 956 957 958 959
		component_of_node = component->dev->of_node;
		if (!component_of_node && component->dev->parent)
			component_of_node = component->dev->parent->of_node;

		if (dlc->of_node && component_of_node != dlc->of_node)
960
			continue;
961
		if (dlc->name && strcmp(component->name, dlc->name))
962 963 964
			continue;
		list_for_each_entry(dai, &component->dai_list, list) {
			if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
965 966
				continue;

967
			return dai;
968 969 970 971 972
		}
	}

	return NULL;
}
M
Mengdong Lin 已提交
973
EXPORT_SYMBOL_GPL(snd_soc_find_dai);
974

M
Mengdong Lin 已提交
975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016

/**
 * 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
 * @stream name: DAI link stream name to match, optional
 *
 * 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);

	list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
		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);

1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029
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;

	list_for_each_entry(rtd, &card->rtd_list, list) {
		if (rtd->dai_link == dai_link)
			return true;
	}

	return false;
}

1030 1031
static int soc_bind_dai_link(struct snd_soc_card *card,
	struct snd_soc_dai_link *dai_link)
F
Frank Mandarino 已提交
1032
{
1033
	struct snd_soc_pcm_runtime *rtd;
1034
	struct snd_soc_dai_link_component *codecs = dai_link->codecs;
1035
	struct snd_soc_dai_link_component cpu_dai_component;
1036
	struct snd_soc_dai **codec_dais;
1037
	struct snd_soc_platform *platform;
1038
	struct device_node *platform_of_node;
1039
	const char *platform_name;
1040
	int i;
1041

1042
	dev_dbg(card->dev, "ASoC: binding %s\n", dai_link->name);
1043

1044 1045 1046 1047 1048
	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;
	}
1049

S
Sudip Mukherjee 已提交
1050 1051 1052 1053
	rtd = soc_new_pcm_runtime(card, dai_link);
	if (!rtd)
		return -ENOMEM;

1054 1055 1056 1057
	cpu_dai_component.name = dai_link->cpu_name;
	cpu_dai_component.of_node = dai_link->cpu_of_node;
	cpu_dai_component.dai_name = dai_link->cpu_dai_name;
	rtd->cpu_dai = snd_soc_find_dai(&cpu_dai_component);
1058
	if (!rtd->cpu_dai) {
1059
		dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
1060
			dai_link->cpu_dai_name);
1061
		goto _err_defer;
1062 1063
	}

1064
	rtd->num_codecs = dai_link->num_codecs;
1065

1066
	/* Find CODEC from registered CODECs */
1067
	codec_dais = rtd->codec_dais;
1068
	for (i = 0; i < rtd->num_codecs; i++) {
1069
		codec_dais[i] = snd_soc_find_dai(&codecs[i]);
1070 1071 1072
		if (!codec_dais[i]) {
			dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
				codecs[i].dai_name);
1073
			goto _err_defer;
1074
		}
1075 1076
	}

1077 1078 1079 1080
	/* Single codec links expect codec and codec_dai in runtime data */
	rtd->codec_dai = codec_dais[0];
	rtd->codec = rtd->codec_dai->codec;

1081 1082
	/* if there's no platform we match on the empty platform */
	platform_name = dai_link->platform_name;
1083
	if (!platform_name && !dai_link->platform_of_node)
1084 1085
		platform_name = "snd-soc-dummy";

1086
	/* find one from the set of registered platforms */
1087
	list_for_each_entry(platform, &platform_list, list) {
1088 1089 1090 1091
		platform_of_node = platform->dev->of_node;
		if (!platform_of_node && platform->dev->parent->of_node)
			platform_of_node = platform->dev->parent->of_node;

1092
		if (dai_link->platform_of_node) {
1093
			if (platform_of_node != dai_link->platform_of_node)
1094 1095
				continue;
		} else {
1096
			if (strcmp(platform->component.name, platform_name))
1097 1098
				continue;
		}
1099 1100

		rtd->platform = platform;
1101
	}
1102
	if (!rtd->platform) {
1103
		dev_err(card->dev, "ASoC: platform %s not registered\n",
1104
			dai_link->platform_name);
1105
		goto _err_defer;
1106
	}
1107

1108
	soc_add_pcm_runtime(card, rtd);
1109
	return 0;
1110 1111 1112 1113

_err_defer:
	soc_free_pcm_runtime(rtd);
	return  -EPROBE_DEFER;
1114 1115
}

1116
static void soc_remove_component(struct snd_soc_component *component)
1117
{
1118
	if (!component->card)
1119
		return;
1120

1121
	list_del(&component->card_list);
1122

1123 1124
	if (component->remove)
		component->remove(component);
1125

1126
	snd_soc_dapm_free(snd_soc_component_get_dapm(component));
1127

1128
	soc_cleanup_component_debugfs(component);
1129
	component->card = NULL;
1130
	module_put(component->dev->driver->owner);
1131 1132
}

1133
static void soc_remove_dai(struct snd_soc_dai *dai, int order)
1134 1135 1136
{
	int err;

1137 1138 1139 1140
	if (dai && dai->probed &&
			dai->driver->remove_order == order) {
		if (dai->driver->remove) {
			err = dai->driver->remove(dai);
1141
			if (err < 0)
1142
				dev_err(dai->dev,
1143
					"ASoC: failed to remove %s: %d\n",
1144
					dai->name, err);
1145
		}
1146
		dai->probed = 0;
1147
	}
1148 1149
}

1150 1151
static void soc_remove_link_dais(struct snd_soc_card *card,
		struct snd_soc_pcm_runtime *rtd, int order)
1152
{
1153
	int i;
1154 1155 1156 1157 1158 1159 1160 1161

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

	/* remove the CODEC DAI */
1162
	for (i = 0; i < rtd->num_codecs; i++)
1163
		soc_remove_dai(rtd->codec_dais[i], order);
1164

1165
	soc_remove_dai(rtd->cpu_dai, order);
1166
}
F
Frank Mandarino 已提交
1167

1168 1169
static void soc_remove_link_components(struct snd_soc_card *card,
	struct snd_soc_pcm_runtime *rtd, int order)
1170 1171 1172
{
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_platform *platform = rtd->platform;
1173
	struct snd_soc_component *component;
1174
	int i;
1175 1176

	/* remove the platform */
1177
	if (platform && platform->component.driver->remove_order == order)
1178
		soc_remove_component(&platform->component);
1179 1180

	/* remove the CODEC-side CODEC */
1181
	for (i = 0; i < rtd->num_codecs; i++) {
1182
		component = rtd->codec_dais[i]->component;
1183
		if (component->driver->remove_order == order)
1184
			soc_remove_component(component);
1185 1186 1187 1188
	}

	/* remove any CPU-side CODEC */
	if (cpu_dai) {
1189
		if (cpu_dai->component->driver->remove_order == order)
1190
			soc_remove_component(cpu_dai->component);
1191 1192 1193
	}
}

1194 1195
static void soc_remove_dai_links(struct snd_soc_card *card)
{
1196 1197
	int order;
	struct snd_soc_pcm_runtime *rtd;
1198
	struct snd_soc_dai_link *link, *_link;
1199

1200 1201
	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
			order++) {
1202 1203
		list_for_each_entry(rtd, &card->rtd_list, list)
			soc_remove_link_dais(card, rtd, order);
1204 1205 1206 1207
	}

	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
			order++) {
1208 1209
		list_for_each_entry(rtd, &card->rtd_list, list)
			soc_remove_link_components(card, rtd, order);
1210
	}
1211

1212 1213 1214 1215 1216 1217 1218 1219
	list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
		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);
		card->num_dai_links--;
	}
1220 1221
}

1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313
static int snd_soc_init_multicodec(struct snd_soc_card *card,
				   struct snd_soc_dai_link *dai_link)
{
	/* Legacy codec/codec_dai link is a single entry in multicodec */
	if (dai_link->codec_name || dai_link->codec_of_node ||
	    dai_link->codec_dai_name) {
		dai_link->num_codecs = 1;

		dai_link->codecs = devm_kzalloc(card->dev,
				sizeof(struct snd_soc_dai_link_component),
				GFP_KERNEL);
		if (!dai_link->codecs)
			return -ENOMEM;

		dai_link->codecs[0].name = dai_link->codec_name;
		dai_link->codecs[0].of_node = dai_link->codec_of_node;
		dai_link->codecs[0].dai_name = dai_link->codec_dai_name;
	}

	if (!dai_link->codecs) {
		dev_err(card->dev, "ASoC: DAI link has no CODECs\n");
		return -EINVAL;
	}

	return 0;
}

static int soc_init_dai_link(struct snd_soc_card *card,
				   struct snd_soc_dai_link *link)
{
	int i, ret;

	ret = snd_soc_init_multicodec(card, link);
	if (ret) {
		dev_err(card->dev, "ASoC: failed to init multicodec\n");
		return ret;
	}

	for (i = 0; i < link->num_codecs; i++) {
		/*
		 * Codec must be specified by 1 of name or OF node,
		 * not both or neither.
		 */
		if (!!link->codecs[i].name ==
		    !!link->codecs[i].of_node) {
			dev_err(card->dev, "ASoC: Neither/both codec name/of_node are set for %s\n",
				link->name);
			return -EINVAL;
		}
		/* Codec DAI name must be specified */
		if (!link->codecs[i].dai_name) {
			dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
				link->name);
			return -EINVAL;
		}
	}

	/*
	 * Platform may be specified by either name or OF node, but
	 * can be left unspecified, and a dummy platform will be used.
	 */
	if (link->platform_name && link->platform_of_node) {
		dev_err(card->dev,
			"ASoC: Both platform name/of_node are set for %s\n",
			link->name);
		return -EINVAL;
	}

	/*
	 * 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..
	 */
	if (link->cpu_name && link->cpu_of_node) {
		dev_err(card->dev,
			"ASoC: Neither/both cpu name/of_node are set for %s\n",
			link->name);
		return -EINVAL;
	}
	/*
	 * At least one of CPU DAI name or CPU device name/node must be
	 * specified
	 */
	if (!link->cpu_dai_name &&
	    !(link->cpu_name || link->cpu_of_node)) {
		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;
1314 1315
}

1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337
/**
 * 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);
1338 1339 1340 1341 1342 1343
	/* Notify the machine driver for extra initialization
	 * on the link created by topology.
	 */
	if (dai_link->dobj.type && card->add_dai_link)
		card->add_dai_link(card, dai_link);

1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373
	list_add_tail(&dai_link->list, &card->dai_link_list);
	card->num_dai_links++;

	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);
1374 1375 1376 1377 1378 1379
	/* Notify the machine driver for extra destruction
	 * on the link created by topology.
	 */
	if (dai_link->dobj.type && card->remove_dai_link)
		card->remove_dai_link(card, dai_link);

1380 1381 1382 1383 1384 1385 1386 1387 1388 1389
	list_for_each_entry_safe(link, _link, &card->dai_link_list, list) {
		if (link == dai_link) {
			list_del(&link->list);
			card->num_dai_links--;
			return;
		}
	}
}
EXPORT_SYMBOL_GPL(snd_soc_remove_dai_link);

1390
static void soc_set_name_prefix(struct snd_soc_card *card,
1391
				struct snd_soc_component *component)
1392 1393 1394
{
	int i;

1395
	if (card->codec_conf == NULL)
1396 1397
		return;

1398 1399
	for (i = 0; i < card->num_configs; i++) {
		struct snd_soc_codec_conf *map = &card->codec_conf[i];
1400
		if (map->of_node && component->dev->of_node != map->of_node)
1401
			continue;
1402
		if (map->dev_name && strcmp(component->name, map->dev_name))
1403
			continue;
1404
		component->name_prefix = map->name_prefix;
1405
		break;
1406 1407 1408
	}
}

1409 1410
static int soc_probe_component(struct snd_soc_card *card,
	struct snd_soc_component *component)
1411
{
1412
	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1413
	struct snd_soc_dai *dai;
1414
	int ret;
1415

1416
	if (!strcmp(component->name, "snd-soc-dummy"))
1417
		return 0;
1418

1419
	if (component->card) {
1420 1421 1422 1423 1424 1425 1426 1427
		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;
	}
1428

1429
	if (!try_module_get(component->dev->driver->owner))
1430 1431
		return -ENODEV;

1432 1433 1434
	component->card = card;
	dapm->card = card;
	soc_set_name_prefix(card, component);
1435

1436
	soc_init_component_debugfs(component);
1437

1438 1439 1440
	if (component->dapm_widgets) {
		ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
			component->num_dapm_widgets);
1441 1442

		if (ret != 0) {
1443
			dev_err(component->dev,
1444 1445 1446 1447
				"Failed to create new controls %d\n", ret);
			goto err_probe;
		}
	}
1448

1449 1450
	list_for_each_entry(dai, &component->dai_list, list) {
		ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1451
		if (ret != 0) {
1452
			dev_err(component->dev,
1453 1454 1455 1456
				"Failed to create DAI widgets %d\n", ret);
			goto err_probe;
		}
	}
1457

1458 1459
	if (component->probe) {
		ret = component->probe(component);
1460
		if (ret < 0) {
1461 1462
			dev_err(component->dev,
				"ASoC: failed to probe component %d\n", ret);
1463
			goto err_probe;
1464
		}
1465

1466 1467 1468 1469
		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);
1470 1471
	}

1472 1473 1474 1475 1476 1477 1478 1479 1480 1481
	/* 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;
		}
	}

1482 1483 1484 1485 1486 1487
	if (component->controls)
		snd_soc_add_component_controls(component, component->controls,
				     component->num_controls);
	if (component->dapm_routes)
		snd_soc_dapm_add_routes(dapm, component->dapm_routes,
					component->num_dapm_routes);
1488

1489
	list_add(&dapm->list, &card->dapm_list);
1490
	list_add(&component->card_list, &card->component_dev_list);
1491 1492 1493 1494

	return 0;

err_probe:
1495
	soc_cleanup_component_debugfs(component);
1496
	component->card = NULL;
1497
	module_put(component->dev->driver->owner);
1498 1499 1500 1501

	return ret;
}

1502 1503 1504 1505
static void rtd_release(struct device *dev)
{
	kfree(dev);
}
1506

1507 1508
static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
	const char *name)
1509
{
1510 1511 1512
	int ret = 0;

	/* register the rtd device */
1513 1514 1515 1516
	rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
	if (!rtd->dev)
		return -ENOMEM;
	device_initialize(rtd->dev);
1517
	rtd->dev->parent = rtd->card->dev;
1518
	rtd->dev->release = rtd_release;
1519
	rtd->dev->groups = soc_dev_attr_groups;
1520
	dev_set_name(rtd->dev, "%s", name);
1521
	dev_set_drvdata(rtd->dev, rtd);
L
Liam Girdwood 已提交
1522
	mutex_init(&rtd->pcm_mutex);
1523 1524 1525 1526
	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);
1527
	ret = device_add(rtd->dev);
1528
	if (ret < 0) {
1529 1530
		/* calling put_device() here to free the rtd->dev */
		put_device(rtd->dev);
1531
		dev_err(rtd->card->dev,
1532
			"ASoC: failed to register runtime device: %d\n", ret);
1533 1534 1535 1536 1537 1538
		return ret;
	}
	rtd->dev_registered = 1;
	return 0;
}

1539 1540
static int soc_probe_link_components(struct snd_soc_card *card,
			struct snd_soc_pcm_runtime *rtd,
1541 1542 1543
				     int order)
{
	struct snd_soc_platform *platform = rtd->platform;
1544
	struct snd_soc_component *component;
1545
	int i, ret;
1546 1547

	/* probe the CPU-side component, if it is a CODEC */
1548
	component = rtd->cpu_dai->component;
1549
	if (component->driver->probe_order == order) {
1550
		ret = soc_probe_component(card, component);
1551 1552 1553 1554
		if (ret < 0)
			return ret;
	}

1555 1556
	/* probe the CODEC-side components */
	for (i = 0; i < rtd->num_codecs; i++) {
1557
		component = rtd->codec_dais[i]->component;
1558
		if (component->driver->probe_order == order) {
1559
			ret = soc_probe_component(card, component);
1560 1561 1562
			if (ret < 0)
				return ret;
		}
1563 1564 1565
	}

	/* probe the platform */
1566
	if (platform->component.driver->probe_order == order) {
1567
		ret = soc_probe_component(card, &platform->component);
1568 1569 1570 1571 1572 1573 1574
		if (ret < 0)
			return ret;
	}

	return 0;
}

1575
static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1576 1577 1578
{
	int ret;

1579 1580 1581
	if (!dai->probed && dai->driver->probe_order == order) {
		if (dai->driver->probe) {
			ret = dai->driver->probe(dai);
1582
			if (ret < 0) {
1583 1584 1585
				dev_err(dai->dev,
					"ASoC: failed to probe DAI %s: %d\n",
					dai->name, ret);
1586 1587 1588 1589
				return ret;
			}
		}

1590
		dai->probed = 1;
1591 1592 1593 1594 1595
	}

	return 0;
}

1596 1597
static int soc_link_dai_widgets(struct snd_soc_card *card,
				struct snd_soc_dai_link *dai_link,
1598
				struct snd_soc_pcm_runtime *rtd)
1599
{
1600 1601
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
1602
	struct snd_soc_dapm_widget *sink, *source;
1603 1604
	int ret;

1605 1606 1607
	if (rtd->num_codecs > 1)
		dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");

1608
	/* link the DAI widgets */
1609 1610 1611
	sink = codec_dai->playback_widget;
	source = cpu_dai->capture_widget;
	if (sink && source) {
1612
		ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1613 1614
					   dai_link->num_params,
					   source, sink);
1615 1616
		if (ret != 0) {
			dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1617
				sink->name, source->name, ret);
1618 1619 1620 1621
			return ret;
		}
	}

1622 1623 1624
	sink = cpu_dai->playback_widget;
	source = codec_dai->capture_widget;
	if (sink && source) {
1625
		ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1626 1627
					   dai_link->num_params,
					   source, sink);
1628 1629
		if (ret != 0) {
			dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1630
				sink->name, source->name, ret);
1631 1632 1633 1634 1635 1636 1637
			return ret;
		}
	}

	return 0;
}

1638 1639
static int soc_probe_link_dais(struct snd_soc_card *card,
		struct snd_soc_pcm_runtime *rtd, int order)
1640
{
1641
	struct snd_soc_dai_link *dai_link = rtd->dai_link;
1642
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1643
	int i, ret;
1644

1645
	dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1646
			card->name, rtd->num, order);
1647 1648 1649 1650

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

1651 1652 1653
	ret = soc_probe_dai(cpu_dai, order);
	if (ret)
		return ret;
F
Frank Mandarino 已提交
1654

1655
	/* probe the CODEC DAI */
1656
	for (i = 0; i < rtd->num_codecs; i++) {
1657
		ret = soc_probe_dai(rtd->codec_dais[i], order);
1658 1659 1660
		if (ret)
			return ret;
	}
M
Mark Brown 已提交
1661

1662 1663 1664 1665
	/* complete DAI probe during last probe */
	if (order != SND_SOC_COMP_ORDER_LAST)
		return 0;

1666 1667 1668 1669 1670 1671 1672 1673 1674 1675
	/* 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;
		}
	}

1676 1677 1678
	if (dai_link->dai_fmt)
		snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);

1679
	ret = soc_post_component_init(rtd, dai_link->name);
1680
	if (ret)
1681
		return ret;
M
Mark Brown 已提交
1682

1683 1684
#ifdef CONFIG_DEBUG_FS
	/* add DPCM sysfs entries */
1685 1686
	if (dai_link->dynamic)
		soc_dpcm_debugfs_add(rtd);
1687 1688
#endif

1689
	if (cpu_dai->driver->compress_new) {
1690
		/*create compress_device"*/
1691
		ret = cpu_dai->driver->compress_new(rtd, rtd->num);
1692
		if (ret < 0) {
1693
			dev_err(card->dev, "ASoC: can't create compress %s\n",
1694
					 dai_link->stream_name);
1695 1696 1697
			return ret;
		}
	} else {
1698 1699 1700

		if (!dai_link->params) {
			/* create the pcm */
1701
			ret = soc_new_pcm(rtd, rtd->num);
1702
			if (ret < 0) {
1703
				dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1704
				       dai_link->stream_name, ret);
1705 1706
				return ret;
			}
1707
		} else {
1708 1709 1710
			INIT_DELAYED_WORK(&rtd->delayed_work,
						codec2codec_close_delayed_work);

1711
			/* link the DAI widgets */
1712
			ret = soc_link_dai_widgets(card, dai_link, rtd);
1713 1714
			if (ret)
				return ret;
1715
		}
1716 1717 1718 1719 1720
	}

	return 0;
}

1721
static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1722 1723
{
	struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746
	struct snd_soc_component *component;
	const char *name;
	struct device_node *codec_of_node;

	if (aux_dev->codec_of_node || aux_dev->codec_name) {
		/* codecs, usually analog devices */
		name = aux_dev->codec_name;
		codec_of_node = aux_dev->codec_of_node;
		component = soc_find_component(codec_of_node, name);
		if (!component) {
			if (codec_of_node)
				name = of_node_full_name(codec_of_node);
			goto err_defer;
		}
	} else if (aux_dev->name) {
		/* generic components */
		name = aux_dev->name;
		component = soc_find_component(NULL, name);
		if (!component)
			goto err_defer;
	} else {
		dev_err(card->dev, "ASoC: Invalid auxiliary device\n");
		return -EINVAL;
1747
	}
1748

1749
	component->init = aux_dev->init;
1750 1751
	component->auxiliary = 1;

1752
	return 0;
1753 1754 1755 1756

err_defer:
	dev_err(card->dev, "ASoC: %s not registered\n", name);
	return -EPROBE_DEFER;
1757 1758
}

1759
static int soc_probe_aux_devices(struct snd_soc_card *card)
1760
{
1761 1762
	struct snd_soc_component *comp;
	int order;
1763
	int ret;
1764

1765 1766
	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
		order++) {
1767 1768 1769 1770
		list_for_each_entry(comp, &card->component_dev_list, card_list) {
			if (!comp->auxiliary)
				continue;

1771 1772 1773 1774 1775 1776 1777 1778 1779
			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;
				}
			}
1780 1781
		}
	}
1782

1783
	return 0;
1784 1785
}

1786
static void soc_remove_aux_devices(struct snd_soc_card *card)
1787
{
1788 1789
	struct snd_soc_component *comp, *_comp;
	int order;
1790

1791 1792 1793
	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
		order++) {
		list_for_each_entry_safe(comp, _comp,
1794 1795 1796 1797 1798
			&card->component_dev_list, card_list) {

			if (!comp->auxiliary)
				continue;

1799 1800
			if (comp->driver->remove_order == order) {
				soc_remove_component(comp);
1801
				comp->auxiliary = 0;
1802 1803
			}
		}
1804 1805 1806
	}
}

1807
static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1808 1809 1810 1811 1812 1813 1814 1815
{
	int ret;

	if (codec->cache_init)
		return 0;

	ret = snd_soc_cache_init(codec);
	if (ret < 0) {
1816 1817 1818
		dev_err(codec->dev,
			"ASoC: Failed to set cache compression type: %d\n",
			ret);
1819 1820 1821 1822 1823 1824
		return ret;
	}
	codec->cache_init = 1;
	return 0;
}

1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888
/**
 * 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 **codec_dais = rtd->codec_dais;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	unsigned int i;
	int ret;

	for (i = 0; i < rtd->num_codecs; i++) {
		struct snd_soc_dai *codec_dai = codec_dais[i];

		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;
		}
	}

	/* Flip the polarity for the "CPU" end of a CODEC<->CODEC link */
	if (cpu_dai->codec) {
		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;
}
1889
EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1890

1891
static int snd_soc_instantiate_card(struct snd_soc_card *card)
1892
{
1893
	struct snd_soc_codec *codec;
1894
	struct snd_soc_pcm_runtime *rtd;
1895
	struct snd_soc_dai_link *dai_link;
1896
	int ret, i, order;
M
Mark Brown 已提交
1897

1898
	mutex_lock(&client_mutex);
1899
	mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1900

1901
	/* bind DAIs */
1902
	for (i = 0; i < card->num_links; i++) {
1903
		ret = soc_bind_dai_link(card, &card->dai_link[i]);
1904 1905 1906
		if (ret != 0)
			goto base_error;
	}
M
Mark Brown 已提交
1907

1908
	/* bind aux_devs too */
1909
	for (i = 0; i < card->num_aux_devs; i++) {
1910
		ret = soc_bind_aux_dev(card, i);
1911 1912
		if (ret != 0)
			goto base_error;
1913
	}
1914

1915 1916 1917 1918
	/* add predefined DAI links to the list */
	for (i = 0; i < card->num_links; i++)
		snd_soc_add_dai_link(card, card->dai_link+i);

1919 1920 1921 1922
	/* initialize the register cache for each available codec */
	list_for_each_entry(codec, &codec_list, list) {
		if (codec->cache_init)
			continue;
1923
		ret = snd_soc_init_codec_cache(codec);
1924 1925
		if (ret < 0)
			goto base_error;
1926 1927
	}

1928
	/* card bind complete so register a sound card */
1929
	ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1930 1931
			card->owner, 0, &card->snd_card);
	if (ret < 0) {
1932 1933 1934
		dev_err(card->dev,
			"ASoC: can't create sound card for card %s: %d\n",
			card->name, ret);
1935
		goto base_error;
1936 1937
	}

1938 1939
	soc_init_card_debugfs(card);

M
Mark Brown 已提交
1940 1941 1942 1943 1944
	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);

1945 1946 1947 1948
#ifdef CONFIG_DEBUG_FS
	snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
#endif

1949
#ifdef CONFIG_PM_SLEEP
1950 1951 1952
	/* deferred resume work */
	INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
#endif
F
Frank Mandarino 已提交
1953

1954 1955 1956 1957
	if (card->dapm_widgets)
		snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
					  card->num_dapm_widgets);

1958 1959 1960 1961
	if (card->of_dapm_widgets)
		snd_soc_dapm_new_controls(&card->dapm, card->of_dapm_widgets,
					  card->num_of_dapm_widgets);

1962 1963
	/* initialise the sound card only once */
	if (card->probe) {
1964
		ret = card->probe(card);
1965 1966 1967
		if (ret < 0)
			goto card_probe_error;
	}
M
Mark Brown 已提交
1968

1969
	/* probe all components used by DAI links on this card */
1970 1971
	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
			order++) {
1972 1973
		list_for_each_entry(rtd, &card->rtd_list, list) {
			ret = soc_probe_link_components(card, rtd, order);
1974
			if (ret < 0) {
1975 1976 1977
				dev_err(card->dev,
					"ASoC: failed to instantiate card %d\n",
					ret);
1978 1979 1980 1981 1982
				goto probe_dai_err;
			}
		}
	}

1983 1984 1985 1986 1987
	/* probe auxiliary components */
	ret = soc_probe_aux_devices(card);
	if (ret < 0)
		goto probe_dai_err;

1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002
	/* Find new DAI links added during probing components and bind them.
	 * Components with topology may bring new DAIs and DAI links.
	 */
	list_for_each_entry(dai_link, &card->dai_link_list, list) {
		if (soc_is_dai_link_bound(card, dai_link))
			continue;

		ret = soc_init_dai_link(card, dai_link);
		if (ret)
			goto probe_dai_err;
		ret = soc_bind_dai_link(card, dai_link);
		if (ret)
			goto probe_dai_err;
	}

2003 2004 2005
	/* probe all DAI links on this card */
	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
			order++) {
2006 2007
		list_for_each_entry(rtd, &card->rtd_list, list) {
			ret = soc_probe_link_dais(card, rtd, order);
2008
			if (ret < 0) {
2009 2010 2011
				dev_err(card->dev,
					"ASoC: failed to instantiate card %d\n",
					ret);
2012 2013
				goto probe_dai_err;
			}
2014 2015
		}
	}
F
Frank Mandarino 已提交
2016

2017
	snd_soc_dapm_link_dai_widgets(card);
2018
	snd_soc_dapm_connect_dai_link_widgets(card);
2019

2020
	if (card->controls)
2021
		snd_soc_add_card_controls(card, card->controls, card->num_controls);
2022

2023 2024 2025 2026
	if (card->dapm_routes)
		snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
					card->num_dapm_routes);

2027 2028 2029
	if (card->of_dapm_routes)
		snd_soc_dapm_add_routes(&card->dapm, card->of_dapm_routes,
					card->num_of_dapm_routes);
2030

2031 2032
	snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
		 "%s", card->name);
2033 2034
	snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
		 "%s", card->long_name ? card->long_name : card->name);
2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048
	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;
		}
	}
2049

2050 2051 2052
	if (card->late_probe) {
		ret = card->late_probe(card);
		if (ret < 0) {
2053
			dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
2054 2055 2056 2057 2058
				card->name, ret);
			goto probe_aux_dev_err;
		}
	}

2059
	snd_soc_dapm_new_widgets(card);
2060

2061 2062
	ret = snd_card_register(card->snd_card);
	if (ret < 0) {
2063 2064
		dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
				ret);
2065
		goto probe_aux_dev_err;
F
Frank Mandarino 已提交
2066 2067
	}

2068
	card->instantiated = 1;
2069
	snd_soc_dapm_sync(&card->dapm);
2070
	mutex_unlock(&card->mutex);
2071
	mutex_unlock(&client_mutex);
2072 2073

	return 0;
2074

2075
probe_aux_dev_err:
2076
	soc_remove_aux_devices(card);
2077

2078
probe_dai_err:
2079
	soc_remove_dai_links(card);
2080 2081

card_probe_error:
2082
	if (card->remove)
2083
		card->remove(card);
2084

2085
	snd_soc_dapm_free(&card->dapm);
2086
	soc_cleanup_card_debugfs(card);
2087 2088
	snd_card_free(card->snd_card);

2089
base_error:
2090
	soc_remove_pcm_runtimes(card);
2091
	mutex_unlock(&card->mutex);
2092
	mutex_unlock(&client_mutex);
F
Frank Mandarino 已提交
2093

2094
	return ret;
2095 2096 2097 2098 2099
}

/* probes a new socdev */
static int soc_probe(struct platform_device *pdev)
{
2100
	struct snd_soc_card *card = platform_get_drvdata(pdev);
2101

2102 2103 2104 2105 2106 2107 2108
	/*
	 * no card, so machine driver should be registering card
	 * we should not be here in that case so ret error
	 */
	if (!card)
		return -EINVAL;

2109
	dev_warn(&pdev->dev,
2110
		 "ASoC: machine %s should use snd_soc_register_card()\n",
2111 2112
		 card->name);

2113 2114
	/* Bodge while we unpick instantiation */
	card->dev = &pdev->dev;
2115

2116
	return snd_soc_register_card(card);
F
Frank Mandarino 已提交
2117 2118
}

2119
static int soc_cleanup_card_resources(struct snd_soc_card *card)
F
Frank Mandarino 已提交
2120
{
2121
	struct snd_soc_pcm_runtime *rtd;
F
Frank Mandarino 已提交
2122

2123
	/* make sure any delayed work runs */
2124
	list_for_each_entry(rtd, &card->rtd_list, list)
2125
		flush_delayed_work(&rtd->delayed_work);
2126

2127
	/* remove and free each DAI */
2128
	soc_remove_dai_links(card);
2129
	soc_remove_pcm_runtimes(card);
2130

2131 2132 2133
	/* remove auxiliary devices */
	soc_remove_aux_devices(card);

2134
	snd_soc_dapm_free(&card->dapm);
2135
	soc_cleanup_card_debugfs(card);
2136

2137 2138
	/* remove the card */
	if (card->remove)
2139
		card->remove(card);
2140

2141 2142 2143 2144 2145 2146 2147 2148 2149
	snd_card_free(card->snd_card);
	return 0;

}

/* 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
2150

M
Mark Brown 已提交
2151
	snd_soc_unregister_card(card);
F
Frank Mandarino 已提交
2152 2153 2154
	return 0;
}

2155
int snd_soc_poweroff(struct device *dev)
M
Mark Brown 已提交
2156
{
2157
	struct snd_soc_card *card = dev_get_drvdata(dev);
2158
	struct snd_soc_pcm_runtime *rtd;
M
Mark Brown 已提交
2159 2160

	if (!card->instantiated)
M
Mark Brown 已提交
2161
		return 0;
M
Mark Brown 已提交
2162 2163 2164

	/* Flush out pmdown_time work - we actually do want to run it
	 * now, we're shutting down so no imminent restart. */
2165
	list_for_each_entry(rtd, &card->rtd_list, list)
2166
		flush_delayed_work(&rtd->delayed_work);
M
Mark Brown 已提交
2167

2168
	snd_soc_dapm_shutdown(card);
M
Mark Brown 已提交
2169

2170
	/* deactivate pins to sleep state */
2171
	list_for_each_entry(rtd, &card->rtd_list, list) {
2172
		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
2173
		int i;
2174

2175
		pinctrl_pm_select_sleep_state(cpu_dai->dev);
2176 2177
		for (i = 0; i < rtd->num_codecs; i++) {
			struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
2178 2179
			pinctrl_pm_select_sleep_state(codec_dai->dev);
		}
2180 2181
	}

M
Mark Brown 已提交
2182
	return 0;
M
Mark Brown 已提交
2183
}
2184
EXPORT_SYMBOL_GPL(snd_soc_poweroff);
M
Mark Brown 已提交
2185

2186
const struct dev_pm_ops snd_soc_pm_ops = {
2187 2188 2189 2190
	.suspend = snd_soc_suspend,
	.resume = snd_soc_resume,
	.freeze = snd_soc_suspend,
	.thaw = snd_soc_resume,
2191
	.poweroff = snd_soc_poweroff,
2192
	.restore = snd_soc_resume,
M
Mark Brown 已提交
2193
};
2194
EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
M
Mark Brown 已提交
2195

F
Frank Mandarino 已提交
2196 2197 2198 2199
/* ASoC platform driver */
static struct platform_driver soc_driver = {
	.driver		= {
		.name		= "soc-audio",
2200
		.pm		= &snd_soc_pm_ops,
F
Frank Mandarino 已提交
2201 2202 2203 2204 2205 2206 2207 2208 2209
	},
	.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
2210
 * @long_name: control long name
2211
 * @prefix: control name prefix
F
Frank Mandarino 已提交
2212 2213 2214 2215 2216 2217
 *
 * 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,
2218
				  void *data, const char *long_name,
2219
				  const char *prefix)
F
Frank Mandarino 已提交
2220 2221
{
	struct snd_kcontrol_new template;
2222 2223
	struct snd_kcontrol *kcontrol;
	char *name = NULL;
F
Frank Mandarino 已提交
2224 2225 2226 2227

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

2228 2229 2230 2231
	if (!long_name)
		long_name = template.name;

	if (prefix) {
2232
		name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245
		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
2246 2247 2248
}
EXPORT_SYMBOL_GPL(snd_soc_cnew);

2249 2250 2251 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];
		err = snd_ctl_add(card, snd_soc_cnew(control, data,
						     control->name, prefix));
		if (err < 0) {
2260 2261
			dev_err(dev, "ASoC: Failed to add %s: %d\n",
				control->name, err);
2262 2263 2264 2265 2266 2267 2268
			return err;
		}
	}

	return 0;
}

2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284
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);

2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303
/**
 * 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);

I
Ian Molton 已提交
2304
/**
2305 2306
 * snd_soc_add_codec_controls - add an array of controls to a codec.
 * Convenience function to add a list of controls. Many codecs were
I
Ian Molton 已提交
2307 2308 2309 2310 2311 2312 2313 2314
 * duplicating this code.
 *
 * @codec: codec to add controls to
 * @controls: array of controls to add
 * @num_controls: number of elements in the array
 *
 * Return 0 for success, else error.
 */
2315
int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
2316
	const struct snd_kcontrol_new *controls, unsigned int num_controls)
I
Ian Molton 已提交
2317
{
2318 2319
	return snd_soc_add_component_controls(&codec->component, controls,
		num_controls);
I
Ian Molton 已提交
2320
}
2321
EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
I
Ian Molton 已提交
2322

2323 2324
/**
 * snd_soc_add_platform_controls - add an array of controls to a platform.
2325
 * Convenience function to add a list of controls.
2326 2327 2328 2329 2330 2331 2332 2333
 *
 * @platform: platform 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_platform_controls(struct snd_soc_platform *platform,
2334
	const struct snd_kcontrol_new *controls, unsigned int num_controls)
2335
{
2336 2337
	return snd_soc_add_component_controls(&platform->component, controls,
		num_controls);
2338 2339 2340
}
EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);

2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373
/**
 * 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)
{
2374
	struct snd_card *card = dai->component->card->snd_card;
2375 2376 2377 2378 2379 2380

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

2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392
/**
 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
 * @dai: DAI
 * @clk_id: DAI specific clock ID
 * @freq: new clock frequency in Hz
 * @dir: new clock direction - input/output.
 *
 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
 */
int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
	unsigned int freq, int dir)
{
2393 2394
	if (dai->driver && dai->driver->ops->set_sysclk)
		return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2395
	else if (dai->codec && dai->codec->driver->set_sysclk)
2396
		return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
2397
						      freq, dir);
2398
	else
2399
		return -ENOTSUPP;
2400 2401 2402
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);

2403 2404 2405 2406
/**
 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
 * @codec: CODEC
 * @clk_id: DAI specific clock ID
2407
 * @source: Source for the clock
2408 2409 2410 2411 2412 2413
 * @freq: new clock frequency in Hz
 * @dir: new clock direction - input/output.
 *
 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
 */
int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
2414
			     int source, unsigned int freq, int dir)
2415 2416
{
	if (codec->driver->set_sysclk)
2417 2418
		return codec->driver->set_sysclk(codec, clk_id, source,
						 freq, dir);
2419
	else
2420
		return -ENOTSUPP;
2421 2422 2423
}
EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);

2424 2425 2426
/**
 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
 * @dai: DAI
M
Mark Brown 已提交
2427
 * @div_id: DAI specific clock divider ID
2428 2429 2430 2431 2432 2433 2434 2435 2436
 * @div: new clock divisor.
 *
 * Configures the clock dividers. This is used to derive the best DAI bit and
 * frame clocks from the system or master clock. It's best to set the DAI bit
 * and frame clocks as low as possible to save system power.
 */
int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
	int div_id, int div)
{
2437 2438
	if (dai->driver && dai->driver->ops->set_clkdiv)
		return dai->driver->ops->set_clkdiv(dai, div_id, div);
2439 2440 2441 2442 2443 2444 2445 2446 2447
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);

/**
 * snd_soc_dai_set_pll - configure DAI PLL.
 * @dai: DAI
 * @pll_id: DAI specific PLL ID
2448
 * @source: DAI specific source for the PLL
2449 2450 2451 2452 2453
 * @freq_in: PLL input clock frequency in Hz
 * @freq_out: requested PLL output clock frequency in Hz
 *
 * Configures and enables PLL to generate output clock based on input clock.
 */
2454 2455
int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
	unsigned int freq_in, unsigned int freq_out)
2456
{
2457 2458
	if (dai->driver && dai->driver->ops->set_pll)
		return dai->driver->ops->set_pll(dai, pll_id, source,
2459
					 freq_in, freq_out);
2460 2461 2462
	else if (dai->codec && dai->codec->driver->set_pll)
		return dai->codec->driver->set_pll(dai->codec, pll_id, source,
						   freq_in, freq_out);
2463 2464 2465 2466 2467
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);

2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488
/*
 * snd_soc_codec_set_pll - configure codec PLL.
 * @codec: CODEC
 * @pll_id: DAI specific PLL ID
 * @source: DAI specific source for the PLL
 * @freq_in: PLL input clock frequency in Hz
 * @freq_out: requested PLL output clock frequency in Hz
 *
 * Configures and enables PLL to generate output clock based on input clock.
 */
int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
			  unsigned int freq_in, unsigned int freq_out)
{
	if (codec->driver->set_pll)
		return codec->driver->set_pll(codec, pll_id, source,
					      freq_in, freq_out);
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);

2489 2490 2491
/**
 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
 * @dai: DAI
2492
 * @ratio: Ratio of BCLK to Sample rate.
2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504
 *
 * Configures the DAI for a preset BCLK to sample rate ratio.
 */
int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
{
	if (dai->driver && dai->driver->ops->set_bclk_ratio)
		return dai->driver->ops->set_bclk_ratio(dai, ratio);
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);

2505 2506 2507 2508 2509 2510 2511 2512 2513
/**
 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
 * @dai: DAI
 * @fmt: SND_SOC_DAIFMT_ format value.
 *
 * Configures the DAI hardware format and clocking.
 */
int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
2514
	if (dai->driver == NULL)
2515
		return -EINVAL;
2516 2517 2518
	if (dai->driver->ops->set_fmt == NULL)
		return -ENOTSUPP;
	return dai->driver->ops->set_fmt(dai, fmt);
2519 2520 2521
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);

2522
/**
2523
 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2524 2525 2526 2527 2528 2529
 * @slots: Number of slots in use.
 * @tx_mask: bitmask representing active TX slots.
 * @rx_mask: bitmask representing active RX slots.
 *
 * Generates the TDM tx and rx slot default masks for DAI.
 */
2530
static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545
					  unsigned int *tx_mask,
					  unsigned int *rx_mask)
{
	if (*tx_mask || *rx_mask)
		return 0;

	if (!slots)
		return -EINVAL;

	*tx_mask = (1 << slots) - 1;
	*rx_mask = (1 << slots) - 1;

	return 0;
}

2546
/**
2547 2548
 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
 * @dai: The DAI to configure
2549 2550
 * @tx_mask: bitmask representing active TX slots.
 * @rx_mask: bitmask representing active RX slots.
2551
 * @slots: Number of slots in use.
2552
 * @slot_width: Width in bits for each slot.
2553
 *
2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567
 * This function configures the specified DAI for TDM operation. @slot contains
 * the total number of slots of the TDM stream and @slot_with the width of each
 * slot in bit clock cycles. @tx_mask and @rx_mask are bitmasks specifying the
 * active slots of the TDM stream for the specified DAI, i.e. which slots the
 * DAI should write to or read from. If a bit is set the corresponding slot is
 * active, if a bit is cleared the corresponding slot is inactive. Bit 0 maps to
 * the first slot, bit 1 to the second slot and so on. The first active slot
 * maps to the first channel of the DAI, the second active slot to the second
 * channel and so on.
 *
 * TDM mode can be disabled by passing 0 for @slots. In this case @tx_mask,
 * @rx_mask and @slot_width will be ignored.
 *
 * Returns 0 on success, a negative error code otherwise.
2568 2569
 */
int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2570
	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2571
{
2572 2573
	if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
		dai->driver->ops->xlate_tdm_slot_mask(slots,
2574 2575
						&tx_mask, &rx_mask);
	else
2576
		snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2577

2578 2579 2580
	dai->tx_mask = tx_mask;
	dai->rx_mask = rx_mask;

2581 2582
	if (dai->driver && dai->driver->ops->set_tdm_slot)
		return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2583
				slots, slot_width);
2584
	else
2585
		return -ENOTSUPP;
2586 2587 2588
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);

2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604
/**
 * snd_soc_dai_set_channel_map - configure DAI audio channel map
 * @dai: DAI
 * @tx_num: how many TX channels
 * @tx_slot: pointer to an array which imply the TX slot number channel
 *           0~num-1 uses
 * @rx_num: how many RX channels
 * @rx_slot: pointer to an array which imply the RX slot number channel
 *           0~num-1 uses
 *
 * configure the relationship between channel number and TDM slot number.
 */
int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
	unsigned int tx_num, unsigned int *tx_slot,
	unsigned int rx_num, unsigned int *rx_slot)
{
2605 2606
	if (dai->driver && dai->driver->ops->set_channel_map)
		return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2607 2608 2609 2610 2611 2612
			rx_num, rx_slot);
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);

2613 2614 2615 2616 2617 2618 2619 2620 2621
/**
 * snd_soc_dai_set_tristate - configure DAI system or master clock.
 * @dai: DAI
 * @tristate: tristate enable
 *
 * Tristates the DAI so that others can use it.
 */
int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
{
2622 2623
	if (dai->driver && dai->driver->ops->set_tristate)
		return dai->driver->ops->set_tristate(dai, tristate);
2624 2625 2626 2627 2628 2629 2630 2631 2632
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);

/**
 * snd_soc_dai_digital_mute - configure DAI system or master clock.
 * @dai: DAI
 * @mute: mute enable
2633
 * @direction: stream to mute
2634 2635 2636
 *
 * Mutes the DAI DAC.
 */
2637 2638
int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
			     int direction)
2639
{
2640 2641 2642 2643 2644 2645 2646
	if (!dai->driver)
		return -ENOTSUPP;

	if (dai->driver->ops->mute_stream)
		return dai->driver->ops->mute_stream(dai, mute, direction);
	else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
		 dai->driver->ops->digital_mute)
2647
		return dai->driver->ops->digital_mute(dai, mute);
2648
	else
2649
		return -ENOTSUPP;
2650 2651 2652
}
EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);

M
Mark Brown 已提交
2653 2654 2655
/**
 * snd_soc_register_card - Register a card with the ASoC core
 *
M
Mark Brown 已提交
2656
 * @card: Card to register
M
Mark Brown 已提交
2657 2658
 *
 */
2659
int snd_soc_register_card(struct snd_soc_card *card)
M
Mark Brown 已提交
2660
{
2661
	int i, ret;
2662
	struct snd_soc_pcm_runtime *rtd;
2663

M
Mark Brown 已提交
2664 2665 2666
	if (!card->name || !card->dev)
		return -EINVAL;

2667 2668 2669
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai_link *link = &card->dai_link[i];

2670
		ret = soc_init_dai_link(card, link);
2671
		if (ret) {
2672
			dev_err(card->dev, "ASoC: failed to init link %s\n",
2673
				link->name);
2674
			return ret;
2675 2676 2677
		}
	}

M
Mark Brown 已提交
2678 2679
	dev_set_drvdata(card->dev, card);

2680 2681
	snd_soc_initialize_card_lists(card);

2682 2683 2684
	INIT_LIST_HEAD(&card->dai_link_list);
	card->num_dai_links = 0;

2685 2686 2687
	INIT_LIST_HEAD(&card->rtd_list);
	card->num_rtd = 0;

2688
	INIT_LIST_HEAD(&card->dapm_dirty);
2689
	INIT_LIST_HEAD(&card->dobj_list);
M
Mark Brown 已提交
2690
	card->instantiated = 0;
2691
	mutex_init(&card->mutex);
2692
	mutex_init(&card->dapm_mutex);
M
Mark Brown 已提交
2693

2694 2695
	ret = snd_soc_instantiate_card(card);
	if (ret != 0)
2696
		return ret;
M
Mark Brown 已提交
2697

2698
	/* deactivate pins to sleep state */
2699
	list_for_each_entry(rtd, &card->rtd_list, list)  {
2700 2701 2702 2703 2704 2705 2706 2707 2708
		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
		int j;

		for (j = 0; j < rtd->num_codecs; j++) {
			struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
			if (!codec_dai->active)
				pinctrl_pm_select_sleep_state(codec_dai->dev);
		}

2709 2710 2711 2712
		if (!cpu_dai->active)
			pinctrl_pm_select_sleep_state(cpu_dai->dev);
	}

2713
	return ret;
M
Mark Brown 已提交
2714
}
2715
EXPORT_SYMBOL_GPL(snd_soc_register_card);
M
Mark Brown 已提交
2716 2717 2718 2719

/**
 * snd_soc_unregister_card - Unregister a card with the ASoC core
 *
M
Mark Brown 已提交
2720
 * @card: Card to unregister
M
Mark Brown 已提交
2721 2722
 *
 */
2723
int snd_soc_unregister_card(struct snd_soc_card *card)
M
Mark Brown 已提交
2724
{
2725 2726
	if (card->instantiated) {
		card->instantiated = false;
2727
		snd_soc_dapm_shutdown(card);
2728
		soc_cleanup_card_resources(card);
2729
		dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2730
	}
M
Mark Brown 已提交
2731 2732 2733

	return 0;
}
2734
EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
M
Mark Brown 已提交
2735

2736 2737 2738 2739
/*
 * Simplify DAI link configuration by removing ".-1" from device names
 * and sanitizing names.
 */
2740
static char *fmt_single_name(struct device *dev, int *id)
2741 2742 2743 2744 2745 2746 2747
{
	char *found, name[NAME_SIZE];
	int id1, id2;

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

2748
	strlcpy(name, dev_name(dev), NAME_SIZE);
2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766

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

			/* create unique ID number from I2C addr and bus */
2767
			*id = ((id1 & 0xffff) << 16) + id2;
2768 2769 2770

			/* sanitize component name for DAI link creation */
			snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2771
			strlcpy(name, tmp, NAME_SIZE);
2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786
		} 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) {
2787 2788 2789
		dev_err(dev,
			"ASoC: error - multiple DAI %s registered with no name\n",
			dev_name(dev));
2790 2791 2792 2793 2794 2795
		return NULL;
	}

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

M
Mark Brown 已提交
2796
/**
2797
 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
M
Mark Brown 已提交
2798
 *
2799
 * @component: The component for which the DAIs should be unregistered
M
Mark Brown 已提交
2800
 */
2801
static void snd_soc_unregister_dais(struct snd_soc_component *component)
M
Mark Brown 已提交
2802
{
L
Lars-Peter Clausen 已提交
2803
	struct snd_soc_dai *dai, *_dai;
M
Mark Brown 已提交
2804

L
Lars-Peter Clausen 已提交
2805
	list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2806 2807
		dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
			dai->name);
L
Lars-Peter Clausen 已提交
2808
		list_del(&dai->list);
2809
		kfree(dai->name);
2810 2811
		kfree(dai);
	}
M
Mark Brown 已提交
2812 2813
}

2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863
/* 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 &&
	   (dai_drv->id == 0 || dai_drv->name == NULL)) {
		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;

	list_add(&dai->list, &component->dai_list);
	component->num_dai++;

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

M
Mark Brown 已提交
2864
/**
2865
 * snd_soc_register_dais - Register a DAI with the ASoC core
M
Mark Brown 已提交
2866
 *
2867 2868
 * @component: The component the DAIs are registered for
 * @dai_drv: DAI driver to use for the DAIs
M
Mark Brown 已提交
2869
 * @count: Number of DAIs
2870 2871
 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
 *                     parent's name.
M
Mark Brown 已提交
2872
 */
2873
static int snd_soc_register_dais(struct snd_soc_component *component,
2874 2875
	struct snd_soc_dai_driver *dai_drv, size_t count,
	bool legacy_dai_naming)
M
Mark Brown 已提交
2876
{
2877
	struct device *dev = component->dev;
2878
	struct snd_soc_dai *dai;
2879 2880
	unsigned int i;
	int ret;
2881

2882
	dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
M
Mark Brown 已提交
2883

2884 2885
	component->dai_drv = dai_drv;

M
Mark Brown 已提交
2886
	for (i = 0; i < count; i++) {
2887

2888 2889
		dai = soc_add_dai(component, dai_drv + i,
				count == 1 && legacy_dai_naming);
2890 2891 2892 2893
		if (dai == NULL) {
			ret = -ENOMEM;
			goto err;
		}
M
Mark Brown 已提交
2894
	}
2895

M
Mark Brown 已提交
2896
	return 0;
2897

M
Mark Brown 已提交
2898
err:
2899
	snd_soc_unregister_dais(component);
2900

M
Mark Brown 已提交
2901 2902 2903
	return ret;
}

2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920
/**
 * 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;
2921

2922 2923 2924 2925
	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
2926 2927
	}

2928 2929 2930 2931
	lockdep_assert_held(&client_mutex);
	dai = soc_add_dai(component, dai_drv, false);
	if (!dai)
		return -ENOMEM;
M
Mark Brown 已提交
2932

2933 2934 2935 2936 2937 2938 2939 2940
	/* Create the DAI widgets here. After adding DAIs, topology may
	 * 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
2941 2942 2943

	return ret;
}
2944
EXPORT_SYMBOL_GPL(snd_soc_register_dai);
M
Mark Brown 已提交
2945

2946 2947
static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
	enum snd_soc_dapm_type type, int subseq)
2948
{
2949
	struct snd_soc_component *component = dapm->component;
2950

2951 2952
	component->driver->seq_notifier(component, type, subseq);
}
2953

2954 2955 2956 2957
static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
	int event)
{
	struct snd_soc_component *component = dapm->component;
2958

2959 2960
	return component->driver->stream_event(component, event);
}
2961

2962 2963
static int snd_soc_component_initialize(struct snd_soc_component *component,
	const struct snd_soc_component_driver *driver, struct device *dev)
2964
{
2965 2966
	struct snd_soc_dapm_context *dapm;

2967 2968 2969
	component->name = fmt_single_name(dev, &component->id);
	if (!component->name) {
		dev_err(dev, "ASoC: Failed to allocate name\n");
2970 2971 2972
		return -ENOMEM;
	}

2973 2974
	component->dev = dev;
	component->driver = driver;
2975 2976
	component->probe = component->driver->probe;
	component->remove = component->driver->remove;
2977 2978
	component->suspend = component->driver->suspend;
	component->resume = component->driver->resume;
2979 2980
	component->pcm_new = component->driver->pcm_new;
	component->pcm_free= component->driver->pcm_free;
2981

2982
	dapm = &component->dapm;
2983 2984 2985
	dapm->dev = dev;
	dapm->component = component;
	dapm->bias_level = SND_SOC_BIAS_OFF;
2986
	dapm->idle_bias_off = true;
2987 2988 2989 2990
	if (driver->seq_notifier)
		dapm->seq_notifier = snd_soc_component_seq_notifier;
	if (driver->stream_event)
		dapm->stream_event = snd_soc_component_stream_event;
2991

2992 2993 2994 2995 2996 2997 2998
	component->controls = driver->controls;
	component->num_controls = driver->num_controls;
	component->dapm_widgets = driver->dapm_widgets;
	component->num_dapm_widgets = driver->num_dapm_widgets;
	component->dapm_routes = driver->dapm_routes;
	component->num_dapm_routes = driver->num_dapm_routes;

2999 3000
	INIT_LIST_HEAD(&component->dai_list);
	mutex_init(&component->io_mutex);
3001

3002 3003
	return 0;
}
3004

3005
static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
3006
{
3007 3008 3009 3010 3011 3012 3013
	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;
}

3014 3015
#ifdef CONFIG_REGMAP

3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030
/**
 * snd_soc_component_init_regmap() - Initialize regmap instance for the component
 * @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);
3031
}
3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049
EXPORT_SYMBOL_GPL(snd_soc_component_init_regmap);

/**
 * snd_soc_component_exit_regmap() - De-initialize regmap instance for the component
 * @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);
3050

3051
#endif
3052

3053 3054
static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
{
3055 3056 3057 3058 3059 3060
	if (!component->write && !component->read) {
		if (!component->regmap)
			component->regmap = dev_get_regmap(component->dev, NULL);
		if (component->regmap)
			snd_soc_component_setup_regmap(component);
	}
3061

3062
	list_add(&component->list, &component_list);
3063
	INIT_LIST_HEAD(&component->dobj_list);
3064
}
3065

3066 3067
static void snd_soc_component_add(struct snd_soc_component *component)
{
3068
	mutex_lock(&client_mutex);
3069
	snd_soc_component_add_unlocked(component);
3070
	mutex_unlock(&client_mutex);
3071
}
3072

3073 3074 3075 3076 3077
static void snd_soc_component_cleanup(struct snd_soc_component *component)
{
	snd_soc_unregister_dais(component);
	kfree(component->name);
}
3078

3079 3080 3081 3082
static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
{
	list_del(&component->list);
}
3083 3084 3085 3086 3087 3088 3089

int snd_soc_register_component(struct device *dev,
			       const struct snd_soc_component_driver *cmpnt_drv,
			       struct snd_soc_dai_driver *dai_drv,
			       int num_dai)
{
	struct snd_soc_component *cmpnt;
3090
	int ret;
3091

3092
	cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
3093 3094 3095 3096 3097
	if (!cmpnt) {
		dev_err(dev, "ASoC: Failed to allocate memory\n");
		return -ENOMEM;
	}

3098 3099 3100 3101
	ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
	if (ret)
		goto err_free;

3102
	cmpnt->ignore_pmdown_time = true;
3103
	cmpnt->registered_as_component = true;
3104

3105 3106
	ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
	if (ret < 0) {
3107
		dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3108 3109
		goto err_cleanup;
	}
3110

3111
	snd_soc_component_add(cmpnt);
3112

3113
	return 0;
3114

3115 3116 3117 3118 3119
err_cleanup:
	snd_soc_component_cleanup(cmpnt);
err_free:
	kfree(cmpnt);
	return ret;
3120
}
3121
EXPORT_SYMBOL_GPL(snd_soc_register_component);
3122

3123 3124 3125
/**
 * snd_soc_unregister_component - Unregister a component from the ASoC core
 *
3126
 * @dev: The device to unregister
3127 3128 3129 3130 3131
 */
void snd_soc_unregister_component(struct device *dev)
{
	struct snd_soc_component *cmpnt;

3132
	mutex_lock(&client_mutex);
3133
	list_for_each_entry(cmpnt, &component_list, list) {
3134
		if (dev == cmpnt->dev && cmpnt->registered_as_component)
3135 3136
			goto found;
	}
3137
	mutex_unlock(&client_mutex);
3138 3139 3140
	return;

found:
3141
	snd_soc_tplg_component_remove(cmpnt, SND_SOC_TPLG_INDEX_ALL);
3142 3143
	snd_soc_component_del_unlocked(cmpnt);
	mutex_unlock(&client_mutex);
3144 3145
	snd_soc_component_cleanup(cmpnt);
	kfree(cmpnt);
3146 3147 3148
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_component);

3149
static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
3150 3151
{
	struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
3152

3153
	return platform->driver->probe(platform);
3154 3155
}

3156
static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
3157 3158 3159
{
	struct snd_soc_platform *platform = snd_soc_component_to_platform(component);

3160
	platform->driver->remove(platform);
3161 3162
}

3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177
static int snd_soc_platform_drv_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_soc_platform *platform = rtd->platform;

	return platform->driver->pcm_new(rtd);
}

static void snd_soc_platform_drv_pcm_free(struct snd_pcm *pcm)
{
	struct snd_soc_pcm_runtime *rtd = pcm->private_data;
	struct snd_soc_platform *platform = rtd->platform;

	platform->driver->pcm_free(pcm);
}

M
Mark Brown 已提交
3178
/**
3179 3180 3181
 * snd_soc_add_platform - Add a platform to the ASoC core
 * @dev: The parent device for the platform
 * @platform: The platform to add
3182
 * @platform_drv: The driver for the platform
M
Mark Brown 已提交
3183
 */
3184
int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
3185
		const struct snd_soc_platform_driver *platform_drv)
M
Mark Brown 已提交
3186
{
3187 3188
	int ret;

3189 3190 3191 3192
	ret = snd_soc_component_initialize(&platform->component,
			&platform_drv->component_driver, dev);
	if (ret)
		return ret;
M
Mark Brown 已提交
3193

3194 3195
	platform->dev = dev;
	platform->driver = platform_drv;
3196 3197 3198 3199 3200

	if (platform_drv->probe)
		platform->component.probe = snd_soc_platform_drv_probe;
	if (platform_drv->remove)
		platform->component.remove = snd_soc_platform_drv_remove;
3201 3202 3203 3204
	if (platform_drv->pcm_new)
		platform->component.pcm_new = snd_soc_platform_drv_pcm_new;
	if (platform_drv->pcm_free)
		platform->component.pcm_free = snd_soc_platform_drv_pcm_free;
M
Mark Brown 已提交
3205

3206 3207 3208
#ifdef CONFIG_DEBUG_FS
	platform->component.debugfs_prefix = "platform";
#endif
M
Mark Brown 已提交
3209 3210

	mutex_lock(&client_mutex);
3211
	snd_soc_component_add_unlocked(&platform->component);
M
Mark Brown 已提交
3212 3213 3214
	list_add(&platform->list, &platform_list);
	mutex_unlock(&client_mutex);

3215 3216
	dev_dbg(dev, "ASoC: Registered platform '%s'\n",
		platform->component.name);
M
Mark Brown 已提交
3217 3218 3219

	return 0;
}
3220
EXPORT_SYMBOL_GPL(snd_soc_add_platform);
M
Mark Brown 已提交
3221 3222

/**
3223
 * snd_soc_register_platform - Register a platform with the ASoC core
M
Mark Brown 已提交
3224
 *
3225 3226
 * @dev: The device for the platform
 * @platform_drv: The driver for the platform
M
Mark Brown 已提交
3227
 */
3228 3229
int snd_soc_register_platform(struct device *dev,
		const struct snd_soc_platform_driver *platform_drv)
M
Mark Brown 已提交
3230
{
3231
	struct snd_soc_platform *platform;
3232
	int ret;
3233

3234
	dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
3235

3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253
	platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
	if (platform == NULL)
		return -ENOMEM;

	ret = snd_soc_add_platform(dev, platform, platform_drv);
	if (ret)
		kfree(platform);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_register_platform);

/**
 * snd_soc_remove_platform - Remove a platform from the ASoC core
 * @platform: the platform to remove
 */
void snd_soc_remove_platform(struct snd_soc_platform *platform)
{
3254

M
Mark Brown 已提交
3255 3256
	mutex_lock(&client_mutex);
	list_del(&platform->list);
3257
	snd_soc_component_del_unlocked(&platform->component);
M
Mark Brown 已提交
3258 3259
	mutex_unlock(&client_mutex);

3260
	dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
3261
		platform->component.name);
3262 3263

	snd_soc_component_cleanup(&platform->component);
3264 3265 3266 3267 3268 3269 3270
}
EXPORT_SYMBOL_GPL(snd_soc_remove_platform);

struct snd_soc_platform *snd_soc_lookup_platform(struct device *dev)
{
	struct snd_soc_platform *platform;

3271
	mutex_lock(&client_mutex);
3272
	list_for_each_entry(platform, &platform_list, list) {
3273 3274
		if (dev == platform->dev) {
			mutex_unlock(&client_mutex);
3275
			return platform;
3276
		}
3277
	}
3278
	mutex_unlock(&client_mutex);
3279 3280 3281 3282 3283 3284 3285 3286

	return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);

/**
 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
 *
3287
 * @dev: platform to unregister
3288 3289 3290 3291 3292 3293 3294 3295 3296 3297
 */
void snd_soc_unregister_platform(struct device *dev)
{
	struct snd_soc_platform *platform;

	platform = snd_soc_lookup_platform(dev);
	if (!platform)
		return;

	snd_soc_remove_platform(platform);
3298
	kfree(platform);
M
Mark Brown 已提交
3299 3300 3301
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);

3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334
static u64 codec_format_map[] = {
	SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
	SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
	SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
	SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
	SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
	SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
	SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
	SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
	SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
	SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
	SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
	SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
	SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
	SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
	SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
	| SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
};

/* 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 fixup_codec_formats(struct snd_soc_pcm_stream *stream)
{
	int i;

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

3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348
static int snd_soc_codec_drv_probe(struct snd_soc_component *component)
{
	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);

	return codec->driver->probe(codec);
}

static void snd_soc_codec_drv_remove(struct snd_soc_component *component)
{
	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);

	codec->driver->remove(codec);
}

3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362
static int snd_soc_codec_drv_suspend(struct snd_soc_component *component)
{
	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);

	return codec->driver->suspend(codec);
}

static int snd_soc_codec_drv_resume(struct snd_soc_component *component)
{
	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);

	return codec->driver->resume(codec);
}

3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380
static int snd_soc_codec_drv_write(struct snd_soc_component *component,
	unsigned int reg, unsigned int val)
{
	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);

	return codec->driver->write(codec, reg, val);
}

static int snd_soc_codec_drv_read(struct snd_soc_component *component,
	unsigned int reg, unsigned int *val)
{
	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);

	*val = codec->driver->read(codec, reg);

	return 0;
}

3381 3382 3383 3384 3385 3386 3387 3388
static int snd_soc_codec_set_bias_level(struct snd_soc_dapm_context *dapm,
	enum snd_soc_bias_level level)
{
	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(dapm);

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

M
Mark Brown 已提交
3389 3390 3391
/**
 * snd_soc_register_codec - Register a codec with the ASoC core
 *
3392 3393 3394 3395
 * @dev: The parent device for this codec
 * @codec_drv: Codec driver
 * @dai_drv: The associated DAI driver
 * @num_dai: Number of DAIs
M
Mark Brown 已提交
3396
 */
3397
int snd_soc_register_codec(struct device *dev,
3398 3399 3400
			   const struct snd_soc_codec_driver *codec_drv,
			   struct snd_soc_dai_driver *dai_drv,
			   int num_dai)
M
Mark Brown 已提交
3401
{
3402
	struct snd_soc_dapm_context *dapm;
3403
	struct snd_soc_codec *codec;
3404
	struct snd_soc_dai *dai;
3405
	int ret, i;
3406

3407 3408 3409 3410 3411
	dev_dbg(dev, "codec register %s\n", dev_name(dev));

	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
	if (codec == NULL)
		return -ENOMEM;
M
Mark Brown 已提交
3412

3413
	codec->component.codec = codec;
3414

3415 3416 3417 3418
	ret = snd_soc_component_initialize(&codec->component,
			&codec_drv->component_driver, dev);
	if (ret)
		goto err_free;
3419

3420 3421 3422 3423
	if (codec_drv->probe)
		codec->component.probe = snd_soc_codec_drv_probe;
	if (codec_drv->remove)
		codec->component.remove = snd_soc_codec_drv_remove;
3424 3425 3426 3427
	if (codec_drv->suspend)
		codec->component.suspend = snd_soc_codec_drv_suspend;
	if (codec_drv->resume)
		codec->component.resume = snd_soc_codec_drv_resume;
3428 3429 3430 3431
	if (codec_drv->write)
		codec->component.write = snd_soc_codec_drv_write;
	if (codec_drv->read)
		codec->component.read = snd_soc_codec_drv_read;
3432
	codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3433 3434 3435 3436

	dapm = snd_soc_codec_get_dapm(codec);
	dapm->idle_bias_off = codec_drv->idle_bias_off;
	dapm->suspend_bias_off = codec_drv->suspend_bias_off;
3437
	if (codec_drv->seq_notifier)
3438
		dapm->seq_notifier = codec_drv->seq_notifier;
3439
	if (codec_drv->set_bias_level)
3440
		dapm->set_bias_level = snd_soc_codec_set_bias_level;
3441 3442
	codec->dev = dev;
	codec->driver = codec_drv;
3443
	codec->component.val_bytes = codec_drv->reg_word_size;
L
Liam Girdwood 已提交
3444

3445 3446 3447 3448 3449
#ifdef CONFIG_DEBUG_FS
	codec->component.init_debugfs = soc_init_codec_debugfs;
	codec->component.debugfs_prefix = "codec";
#endif

3450 3451
	if (codec_drv->get_regmap)
		codec->component.regmap = codec_drv->get_regmap(dev);
3452

3453 3454 3455 3456 3457
	for (i = 0; i < num_dai; i++) {
		fixup_codec_formats(&dai_drv[i].playback);
		fixup_codec_formats(&dai_drv[i].capture);
	}

3458
	ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3459
	if (ret < 0) {
3460
		dev_err(dev, "ASoC: Failed to register DAIs: %d\n", ret);
3461
		goto err_cleanup;
3462
	}
3463

3464 3465
	list_for_each_entry(dai, &codec->component.dai_list, list)
		dai->codec = codec;
3466

3467
	mutex_lock(&client_mutex);
3468
	snd_soc_component_add_unlocked(&codec->component);
3469
	list_add(&codec->list, &codec_list);
3470 3471
	mutex_unlock(&client_mutex);

3472 3473
	dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
		codec->component.name);
M
Mark Brown 已提交
3474
	return 0;
3475

3476 3477 3478
err_cleanup:
	snd_soc_component_cleanup(&codec->component);
err_free:
3479 3480
	kfree(codec);
	return ret;
M
Mark Brown 已提交
3481 3482 3483 3484 3485 3486
}
EXPORT_SYMBOL_GPL(snd_soc_register_codec);

/**
 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
 *
3487
 * @dev: codec to unregister
M
Mark Brown 已提交
3488
 */
3489
void snd_soc_unregister_codec(struct device *dev)
M
Mark Brown 已提交
3490
{
3491 3492
	struct snd_soc_codec *codec;

3493
	mutex_lock(&client_mutex);
3494 3495 3496 3497
	list_for_each_entry(codec, &codec_list, list) {
		if (dev == codec->dev)
			goto found;
	}
3498
	mutex_unlock(&client_mutex);
3499 3500 3501
	return;

found:
M
Mark Brown 已提交
3502
	list_del(&codec->list);
3503
	snd_soc_component_del_unlocked(&codec->component);
M
Mark Brown 已提交
3504 3505
	mutex_unlock(&client_mutex);

3506 3507
	dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
			codec->component.name);
3508

3509
	snd_soc_component_cleanup(&codec->component);
3510
	snd_soc_cache_exit(codec);
3511
	kfree(codec);
M
Mark Brown 已提交
3512 3513 3514
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);

3515
/* Retrieve a card's name from device tree */
3516 3517 3518
int snd_soc_of_parse_card_name_from_node(struct snd_soc_card *card,
					 struct device_node *np,
					 const char *propname)
3519 3520 3521
{
	int ret;

3522 3523 3524 3525 3526
	if (!card->dev) {
		pr_err("card->dev is not set before calling %s\n", __func__);
		return -EINVAL;
	}

3527 3528
	if (!np)
		np = card->dev->of_node;
3529

3530 3531 3532 3533 3534 3535 3536 3537
	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,
3538
			"ASoC: Property '%s' could not be read: %d\n",
3539 3540 3541 3542 3543 3544
			propname, ret);
		return ret;
	}

	return 0;
}
3545
EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name_from_node);
3546

3547 3548 3549 3550 3551 3552 3553
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),
};

3554 3555
int snd_soc_of_parse_audio_simple_widgets_from_node(struct snd_soc_card *card,
					  struct device_node *np,
3556 3557 3558 3559 3560 3561
					  const char *propname)
{
	struct snd_soc_dapm_widget *widgets;
	const char *template, *wname;
	int i, j, num_widgets, ret;

3562 3563 3564
	if (!np)
		np = card->dev->of_node;

3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629
	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;
	}

3630 3631
	card->of_dapm_widgets = widgets;
	card->num_of_dapm_widgets = num_widgets;
3632 3633 3634

	return 0;
}
3635
EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets_from_node);
3636

3637 3638 3639 3640 3641
static int snd_soc_of_get_slot_mask(struct device_node *np,
				    const char *prop_name,
				    unsigned int *mask)
{
	u32 val;
3642
	const __be32 *of_slot_mask = of_get_property(np, prop_name, &val);
3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654
	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;
}

3655
int snd_soc_of_parse_tdm_slot(struct device_node *np,
3656 3657
			      unsigned int *tx_mask,
			      unsigned int *rx_mask,
3658 3659 3660 3661 3662 3663
			      unsigned int *slots,
			      unsigned int *slot_width)
{
	u32 val;
	int ret;

3664 3665 3666 3667 3668
	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);

3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690
	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);

3691 3692
void snd_soc_of_parse_audio_prefix_from_node(struct snd_soc_card *card,
				   struct device_node *np,
3693 3694 3695 3696 3697 3698 3699
				   struct snd_soc_codec_conf *codec_conf,
				   struct device_node *of_node,
				   const char *propname)
{
	const char *str;
	int ret;

3700 3701 3702
	if (!np)
		np = card->dev->of_node;

3703 3704 3705 3706 3707 3708 3709 3710 3711
	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;
}
3712
EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_prefix_from_node);
3713

3714 3715
int snd_soc_of_parse_audio_routing_from_node(struct snd_soc_card *card,
				   struct device_node *np,
3716 3717
				   const char *propname)
{
3718
	int num_routes;
3719 3720 3721
	struct snd_soc_dapm_route *routes;
	int i, ret;

3722 3723 3724
	if (!np)
		np = card->dev->of_node;

3725
	num_routes = of_property_count_strings(np, propname);
3726
	if (num_routes < 0 || num_routes & 1) {
3727 3728 3729
		dev_err(card->dev,
			"ASoC: Property '%s' does not exist or its length is not even\n",
			propname);
3730 3731 3732 3733
		return -EINVAL;
	}
	num_routes /= 2;
	if (!num_routes) {
3734
		dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3735 3736 3737 3738
			propname);
		return -EINVAL;
	}

3739
	routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3740 3741 3742
			      GFP_KERNEL);
	if (!routes) {
		dev_err(card->dev,
3743
			"ASoC: Could not allocate DAPM route table\n");
3744 3745 3746 3747 3748
		return -EINVAL;
	}

	for (i = 0; i < num_routes; i++) {
		ret = of_property_read_string_index(np, propname,
3749
			2 * i, &routes[i].sink);
3750
		if (ret) {
3751 3752 3753
			dev_err(card->dev,
				"ASoC: Property '%s' index %d could not be read: %d\n",
				propname, 2 * i, ret);
3754 3755 3756
			return -EINVAL;
		}
		ret = of_property_read_string_index(np, propname,
3757
			(2 * i) + 1, &routes[i].source);
3758 3759
		if (ret) {
			dev_err(card->dev,
3760 3761
				"ASoC: Property '%s' index %d could not be read: %d\n",
				propname, (2 * i) + 1, ret);
3762 3763 3764 3765
			return -EINVAL;
		}
	}

3766 3767
	card->num_of_dapm_routes = num_routes;
	card->of_dapm_routes = routes;
3768 3769 3770

	return 0;
}
3771
EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing_from_node);
3772

3773
unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3774 3775 3776
				     const char *prefix,
				     struct device_node **bitclkmaster,
				     struct device_node **framemaster)
3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816
{
	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 = "";

	/*
	 * check "[prefix]format = xxx"
	 * SND_SOC_DAIFMT_FORMAT_MASK area
	 */
	snprintf(prop, sizeof(prop), "%sformat", prefix);
	ret = of_property_read_string(np, prop, &str);
	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;
			}
		}
	}

	/*
3817
	 * check "[prefix]continuous-clock"
3818 3819
	 * SND_SOC_DAIFMT_CLOCK_MASK area
	 */
3820
	snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
J
Julia Lawall 已提交
3821
	if (of_property_read_bool(np, prop))
3822 3823 3824
		format |= SND_SOC_DAIFMT_CONT;
	else
		format |= SND_SOC_DAIFMT_GATED;
3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858

	/*
	 * 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);
3859 3860
	if (bit && bitclkmaster)
		*bitclkmaster = of_parse_phandle(np, prop, 0);
3861 3862 3863

	snprintf(prop, sizeof(prop), "%sframe-master", prefix);
	frame = !!of_get_property(np, prop, NULL);
3864 3865
	if (frame && framemaster)
		*framemaster = of_parse_phandle(np, prop, 0);
3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885

	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);

3886
int snd_soc_get_dai_name(struct of_phandle_args *args,
3887
				const char **dai_name)
3888 3889
{
	struct snd_soc_component *pos;
3890
	struct device_node *component_of_node;
3891
	int ret = -EPROBE_DEFER;
3892 3893 3894

	mutex_lock(&client_mutex);
	list_for_each_entry(pos, &component_list, list) {
3895 3896 3897 3898 3899
		component_of_node = pos->dev->of_node;
		if (!component_of_node && pos->dev->parent)
			component_of_node = pos->dev->parent->of_node;

		if (component_of_node != args->np)
3900 3901
			continue;

3902
		if (pos->driver->of_xlate_dai_name) {
3903 3904 3905
			ret = pos->driver->of_xlate_dai_name(pos,
							     args,
							     dai_name);
3906 3907 3908
		} else {
			int id = -1;

3909
			switch (args->args_count) {
3910 3911 3912 3913
			case 0:
				id = 0; /* same as dai_drv[0] */
				break;
			case 1:
3914
				id = args->args[0];
3915 3916 3917 3918 3919 3920 3921 3922
				break;
			default:
				/* not supported */
				break;
			}

			if (id < 0 || id >= pos->num_dai) {
				ret = -EINVAL;
3923
				continue;
3924
			}
X
Xiubo Li 已提交
3925 3926 3927 3928 3929 3930

			ret = 0;

			*dai_name = pos->dai_drv[id].name;
			if (!*dai_name)
				*dai_name = pos->name;
3931 3932 3933 3934 3935
		}

		break;
	}
	mutex_unlock(&client_mutex);
3936 3937
	return ret;
}
3938
EXPORT_SYMBOL_GPL(snd_soc_get_dai_name);
3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951

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);
3952 3953 3954 3955 3956 3957 3958

	of_node_put(args.np);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);

3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029
/*
 * 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.
 * The device nodes in the array (of_node) must be dereferenced by the caller.
 *
 * 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;
	}
	component = devm_kzalloc(dev,
				 sizeof *component * num_codecs,
				 GFP_KERNEL);
	if (!component)
		return -ENOMEM;
	dai_link->codecs = component;
	dai_link->num_codecs = num_codecs;

	/* Parse the list */
	for (index = 0, component = dai_link->codecs;
	     index < dai_link->num_codecs;
	     index++, component++) {
		ret = of_parse_phandle_with_args(of_node, name,
						 "#sound-dai-cells",
						  index, &args);
		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:
	for (index = 0, component = dai_link->codecs;
	     index < dai_link->num_codecs;
	     index++, component++) {
		if (!component->of_node)
			break;
		of_node_put(component->of_node);
		component->of_node = NULL;
	}
	dai_link->codecs = NULL;
	dai_link->num_codecs = 0;
	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_link_codecs);

4030
static int __init snd_soc_init(void)
F
Frank Mandarino 已提交
4031
{
4032
	snd_soc_debugfs_init();
4033 4034
	snd_soc_util_init();

F
Frank Mandarino 已提交
4035 4036
	return platform_driver_register(&soc_driver);
}
4037
module_init(snd_soc_init);
F
Frank Mandarino 已提交
4038

M
Mark Brown 已提交
4039
static void __exit snd_soc_exit(void)
F
Frank Mandarino 已提交
4040
{
4041
	snd_soc_util_exit();
4042
	snd_soc_debugfs_exit();
4043

4044 4045
#ifdef CONFIG_DEBUG_FS
#endif
4046
	platform_driver_unregister(&soc_driver);
F
Frank Mandarino 已提交
4047 4048 4049 4050
}
module_exit(snd_soc_exit);

/* Module information */
4051
MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
F
Frank Mandarino 已提交
4052 4053
MODULE_DESCRIPTION("ALSA SoC Core");
MODULE_LICENSE("GPL");
4054
MODULE_ALIAS("platform:soc-audio");