soc-core.c 91.3 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/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;
	char tmpbuf[len + 1];
	char regbuf[regsize + 1];

	/* since tmpbuf is allocated on the stack, warn the callers if they
	 * try to abuse this function */
	WARN_ON(len > 63);

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

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	ret = snd_soc_read(codec, reg);
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	if (ret < 0) {
		memset(regbuf, 'X', regsize);
		regbuf[regsize] = '\0';
	} else {
		snprintf(regbuf, regsize + 1, "%.*x", regsize, ret);
	}

	/* prepare the buffer */
	snprintf(tmpbuf, len + 1, "%.*x: %s\n", wordsize, reg, regbuf);
	/* copy it back to the caller without the '\0' */
	memcpy(buf, tmpbuf, len);

	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->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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	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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	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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	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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	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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	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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	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)
{
	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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#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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#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)
{
	int i;

	for (i = 0; i < card->num_links; i++) {
		if (card->rtd[i].dai_link->no_pcm &&
			!strcmp(card->rtd[i].dai_link->name, dai_link))
			return card->rtd[i].pcm->streams[stream].substream;
	}
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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);

struct snd_soc_pcm_runtime *snd_soc_get_pcm_runtime(struct snd_soc_card *card,
		const char *dai_link)
{
	int i;

	for (i = 0; i < card->num_links; i++) {
		if (!strcmp(card->rtd[i].dai_link->name, dai_link))
			return &card->rtd[i];
	}
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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_codec *codec;
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	int i, j;
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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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	for (i = 0; i < card->num_rtd; i++) {
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		if (card->rtd[i].dai_link->ignore_suspend)
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			continue;

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		for (j = 0; j < card->rtd[i].num_codecs; j++) {
			struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
			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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	for (i = 0; i < card->num_rtd; i++) {
		if (card->rtd[i].dai_link->ignore_suspend)
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			continue;

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		snd_pcm_suspend_all(card->rtd[i].pcm);
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	}
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	if (card->suspend_pre)
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		card->suspend_pre(card);
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	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
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		if (card->rtd[i].dai_link->ignore_suspend)
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			continue;

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		if (cpu_dai->driver->suspend && !cpu_dai->driver->bus_control)
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			cpu_dai->driver->suspend(cpu_dai);
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	}

	/* close any waiting streams and save state */
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	for (i = 0; i < card->num_rtd; i++) {
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		struct snd_soc_dai **codec_dais = card->rtd[i].codec_dais;
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		flush_delayed_work(&card->rtd[i].delayed_work);
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		for (j = 0; j < card->rtd[i].num_codecs; j++) {
			codec_dais[j]->codec->dapm.suspend_bias_level =
					codec_dais[j]->codec->dapm.bias_level;
		}
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	}
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	for (i = 0; i < card->num_rtd; i++) {
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		if (card->rtd[i].dai_link->ignore_suspend)
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			continue;

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		snd_soc_dapm_stream_event(&card->rtd[i],
					  SNDRV_PCM_STREAM_PLAYBACK,
					  SND_SOC_DAPM_STREAM_SUSPEND);
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		snd_soc_dapm_stream_event(&card->rtd[i],
					  SNDRV_PCM_STREAM_CAPTURE,
					  SND_SOC_DAPM_STREAM_SUSPEND);
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	}

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

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	/* suspend all CODECs */
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	list_for_each_entry(codec, &card->codec_dev_list, card_list) {
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		/* If there are paths active then the CODEC will be held with
		 * bias _ON and should not be suspended. */
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		if (!codec->suspended) {
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			switch (codec->dapm.bias_level) {
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			case SND_SOC_BIAS_STANDBY:
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				/*
				 * If the CODEC is capable of idle
				 * bias off then being in STANDBY
				 * means it's doing something,
				 * otherwise fall through.
				 */
				if (codec->dapm.idle_bias_off) {
					dev_dbg(codec->dev,
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						"ASoC: idle_bias_off CODEC on over suspend\n");
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					break;
				}
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			case SND_SOC_BIAS_OFF:
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				if (codec->driver->suspend)
					codec->driver->suspend(codec);
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				codec->suspended = 1;
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				if (codec->component.regmap)
					regcache_mark_dirty(codec->component.regmap);
639 640
				/* deactivate pins to sleep state */
				pinctrl_pm_select_sleep_state(codec->dev);
641 642
				break;
			default:
643 644
				dev_dbg(codec->dev,
					"ASoC: CODEC is on over suspend\n");
645 646
				break;
			}
647 648
		}
	}
F
Frank Mandarino 已提交
649

650 651
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
652

653
		if (card->rtd[i].dai_link->ignore_suspend)
654 655
			continue;

656
		if (cpu_dai->driver->suspend && cpu_dai->driver->bus_control)
657
			cpu_dai->driver->suspend(cpu_dai);
658 659 660

		/* deactivate pins to sleep state */
		pinctrl_pm_select_sleep_state(cpu_dai->dev);
F
Frank Mandarino 已提交
661 662
	}

663
	if (card->suspend_post)
664
		card->suspend_post(card);
F
Frank Mandarino 已提交
665 666 667

	return 0;
}
668
EXPORT_SYMBOL_GPL(snd_soc_suspend);
F
Frank Mandarino 已提交
669

670 671 672 673
/* 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
674
{
675 676
	struct snd_soc_card *card =
			container_of(work, struct snd_soc_card, deferred_resume_work);
677
	struct snd_soc_codec *codec;
678
	int i, j;
F
Frank Mandarino 已提交
679

680 681 682 683
	/* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
	 * so userspace apps are blocked from touching us
	 */

684
	dev_dbg(card->dev, "ASoC: starting resume work\n");
685

686
	/* Bring us up into D2 so that DAPM starts enabling things */
687
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
688

689
	if (card->resume_pre)
690
		card->resume_pre(card);
F
Frank Mandarino 已提交
691

692
	/* resume control bus DAIs */
693 694
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
695

696
		if (card->rtd[i].dai_link->ignore_suspend)
697 698
			continue;

699
		if (cpu_dai->driver->resume && cpu_dai->driver->bus_control)
700 701 702
			cpu_dai->driver->resume(cpu_dai);
	}

703
	list_for_each_entry(codec, &card->codec_dev_list, card_list) {
704 705 706 707
		/* If the CODEC was idle over suspend then it will have been
		 * left with bias OFF or STANDBY and suspended so we must now
		 * resume.  Otherwise the suspend was suppressed.
		 */
708
		if (codec->suspended) {
L
Liam Girdwood 已提交
709
			switch (codec->dapm.bias_level) {
710 711
			case SND_SOC_BIAS_STANDBY:
			case SND_SOC_BIAS_OFF:
712 713
				if (codec->driver->resume)
					codec->driver->resume(codec);
714 715 716
				codec->suspended = 0;
				break;
			default:
717 718
				dev_dbg(codec->dev,
					"ASoC: CODEC was on over suspend\n");
719 720
				break;
			}
721 722
		}
	}
F
Frank Mandarino 已提交
723

724
	for (i = 0; i < card->num_rtd; i++) {
725

726
		if (card->rtd[i].dai_link->ignore_suspend)
727 728
			continue;

729
		snd_soc_dapm_stream_event(&card->rtd[i],
730
					  SNDRV_PCM_STREAM_PLAYBACK,
731
					  SND_SOC_DAPM_STREAM_RESUME);
732

733
		snd_soc_dapm_stream_event(&card->rtd[i],
734
					  SNDRV_PCM_STREAM_CAPTURE,
735
					  SND_SOC_DAPM_STREAM_RESUME);
F
Frank Mandarino 已提交
736 737
	}

738
	/* unmute any active DACs */
739
	for (i = 0; i < card->num_rtd; i++) {
740

741
		if (card->rtd[i].dai_link->ignore_suspend)
742 743
			continue;

744 745 746 747 748 749 750
		for (j = 0; j < card->rtd[i].num_codecs; j++) {
			struct snd_soc_dai *dai = card->rtd[i].codec_dais[j];
			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
751 752
	}

753 754
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
755

756
		if (card->rtd[i].dai_link->ignore_suspend)
757 758
			continue;

759
		if (cpu_dai->driver->resume && !cpu_dai->driver->bus_control)
760
			cpu_dai->driver->resume(cpu_dai);
F
Frank Mandarino 已提交
761 762
	}

763
	if (card->resume_post)
764
		card->resume_post(card);
F
Frank Mandarino 已提交
765

766
	dev_dbg(card->dev, "ASoC: resume work completed\n");
767 768

	/* userspace can access us now we are back as we were before */
769
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
770

771 772
	/* Recheck all endpoints too, their state is affected by suspend */
	dapm_mark_endpoints_dirty(card);
773
	snd_soc_dapm_sync(&card->dapm);
774 775 776
}

/* powers up audio subsystem after a suspend */
777
int snd_soc_resume(struct device *dev)
778
{
779
	struct snd_soc_card *card = dev_get_drvdata(dev);
780 781
	bool bus_control = false;
	int i;
782

783 784
	/* If the card is not initialized yet there is nothing to do */
	if (!card->instantiated)
785 786
		return 0;

787 788
	/* activate pins from sleep state */
	for (i = 0; i < card->num_rtd; i++) {
789 790 791 792 793
		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
		struct snd_soc_dai **codec_dais = rtd->codec_dais;
		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
		int j;

794 795
		if (cpu_dai->active)
			pinctrl_pm_select_default_state(cpu_dai->dev);
796 797 798 799 800 801

		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);
		}
802 803
	}

804 805 806 807
	/*
	 * 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
808 809
	 * due to I/O costs and anti-pop so handle them out of line.
	 */
810 811
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
812
		bus_control |= cpu_dai->driver->bus_control;
813
	}
814 815
	if (bus_control) {
		dev_dbg(dev, "ASoC: Resuming control bus master immediately\n");
816 817
		soc_resume_deferred(&card->deferred_resume_work);
	} else {
818
		dev_dbg(dev, "ASoC: Scheduling resume work\n");
819
		if (!schedule_work(&card->deferred_resume_work))
820
			dev_err(dev, "ASoC: resume work item may be lost\n");
821
	}
822

F
Frank Mandarino 已提交
823 824
	return 0;
}
825
EXPORT_SYMBOL_GPL(snd_soc_resume);
F
Frank Mandarino 已提交
826
#else
827 828
#define snd_soc_suspend NULL
#define snd_soc_resume NULL
F
Frank Mandarino 已提交
829 830
#endif

831
static const struct snd_soc_dai_ops null_dai_ops = {
832 833
};

834 835
static struct snd_soc_component *soc_find_component(
	const struct device_node *of_node, const char *name)
836
{
837
	struct snd_soc_component *component;
838

839 840 841 842 843 844
	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;
845 846 847 848 849 850
		}
	}

	return NULL;
}

851 852
static struct snd_soc_dai *snd_soc_find_dai(
	const struct snd_soc_dai_link_component *dlc)
853
{
854 855
	struct snd_soc_component *component;
	struct snd_soc_dai *dai;
856

857 858 859 860
	/* Find CPU DAI from registered DAIs*/
	list_for_each_entry(component, &component_list, list) {
		if (dlc->of_node && component->dev->of_node != dlc->of_node)
			continue;
861
		if (dlc->name && strcmp(component->name, dlc->name))
862 863 864
			continue;
		list_for_each_entry(dai, &component->dai_list, list) {
			if (dlc->dai_name && strcmp(dai->name, dlc->dai_name))
865 866
				continue;

867
			return dai;
868 869 870 871 872 873
		}
	}

	return NULL;
}

874
static int soc_bind_dai_link(struct snd_soc_card *card, int num)
F
Frank Mandarino 已提交
875
{
876 877
	struct snd_soc_dai_link *dai_link = &card->dai_link[num];
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
878
	struct snd_soc_dai_link_component *codecs = dai_link->codecs;
879
	struct snd_soc_dai_link_component cpu_dai_component;
880
	struct snd_soc_dai **codec_dais = rtd->codec_dais;
881
	struct snd_soc_platform *platform;
882
	const char *platform_name;
883
	int i;
884

885
	dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
886

887 888 889 890
	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);
891
	if (!rtd->cpu_dai) {
892
		dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
893 894
			dai_link->cpu_dai_name);
		return -EPROBE_DEFER;
895 896
	}

897
	rtd->num_codecs = dai_link->num_codecs;
898

899 900
	/* Find CODEC from registered CODECs */
	for (i = 0; i < rtd->num_codecs; i++) {
901
		codec_dais[i] = snd_soc_find_dai(&codecs[i]);
902 903 904 905 906
		if (!codec_dais[i]) {
			dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
				codecs[i].dai_name);
			return -EPROBE_DEFER;
		}
907 908
	}

909 910 911 912
	/* Single codec links expect codec and codec_dai in runtime data */
	rtd->codec_dai = codec_dais[0];
	rtd->codec = rtd->codec_dai->codec;

913 914
	/* if there's no platform we match on the empty platform */
	platform_name = dai_link->platform_name;
915
	if (!platform_name && !dai_link->platform_of_node)
916 917
		platform_name = "snd-soc-dummy";

918
	/* find one from the set of registered platforms */
919
	list_for_each_entry(platform, &platform_list, list) {
920 921 922 923 924
		if (dai_link->platform_of_node) {
			if (platform->dev->of_node !=
			    dai_link->platform_of_node)
				continue;
		} else {
925
			if (strcmp(platform->component.name, platform_name))
926 927
				continue;
		}
928 929

		rtd->platform = platform;
930
	}
931
	if (!rtd->platform) {
932
		dev_err(card->dev, "ASoC: platform %s not registered\n",
933
			dai_link->platform_name);
934
		return -EPROBE_DEFER;
935
	}
936 937 938 939

	card->num_rtd++;

	return 0;
940 941
}

942
static void soc_remove_component(struct snd_soc_component *component)
943
{
944 945
	if (!component->probed)
		return;
946

947 948 949
	/* This is a HACK and will be removed soon */
	if (component->codec)
		list_del(&component->codec->card_list);
950

951 952
	if (component->remove)
		component->remove(component);
953

954
	snd_soc_dapm_free(snd_soc_component_get_dapm(component));
955

956 957 958
	soc_cleanup_component_debugfs(component);
	component->probed = 0;
	module_put(component->dev->driver->owner);
959 960
}

961
static void soc_remove_dai(struct snd_soc_dai *dai, int order)
962 963 964
{
	int err;

965 966 967 968
	if (dai && dai->probed &&
			dai->driver->remove_order == order) {
		if (dai->driver->remove) {
			err = dai->driver->remove(dai);
969
			if (err < 0)
970
				dev_err(dai->dev,
971
					"ASoC: failed to remove %s: %d\n",
972
					dai->name, err);
973
		}
974
		dai->probed = 0;
975
	}
976 977 978 979 980
}

static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
{
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
981
	int i;
982 983 984 985 986 987 988 989

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

	/* remove the CODEC DAI */
990
	for (i = 0; i < rtd->num_codecs; i++)
991
		soc_remove_dai(rtd->codec_dais[i], order);
992

993
	soc_remove_dai(rtd->cpu_dai, order);
994
}
F
Frank Mandarino 已提交
995

996 997 998 999 1000 1001
static void soc_remove_link_components(struct snd_soc_card *card, int num,
				       int order)
{
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_platform *platform = rtd->platform;
1002
	struct snd_soc_component *component;
1003
	int i;
1004 1005

	/* remove the platform */
1006
	if (platform && platform->component.driver->remove_order == order)
1007
		soc_remove_component(&platform->component);
1008 1009

	/* remove the CODEC-side CODEC */
1010
	for (i = 0; i < rtd->num_codecs; i++) {
1011
		component = rtd->codec_dais[i]->component;
1012
		if (component->driver->remove_order == order)
1013
			soc_remove_component(component);
1014 1015 1016 1017
	}

	/* remove any CPU-side CODEC */
	if (cpu_dai) {
1018
		if (cpu_dai->component->driver->remove_order == order)
1019
			soc_remove_component(cpu_dai->component);
1020 1021 1022
	}
}

1023 1024
static void soc_remove_dai_links(struct snd_soc_card *card)
{
1025
	int dai, order;
1026

1027 1028 1029
	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
			order++) {
		for (dai = 0; dai < card->num_rtd; dai++)
1030 1031 1032 1033 1034 1035 1036
			soc_remove_link_dais(card, dai, order);
	}

	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
			order++) {
		for (dai = 0; dai < card->num_rtd; dai++)
			soc_remove_link_components(card, dai, order);
1037
	}
1038

1039 1040 1041
	card->num_rtd = 0;
}

1042
static void soc_set_name_prefix(struct snd_soc_card *card,
1043
				struct snd_soc_component *component)
1044 1045 1046
{
	int i;

1047
	if (card->codec_conf == NULL)
1048 1049
		return;

1050 1051
	for (i = 0; i < card->num_configs; i++) {
		struct snd_soc_codec_conf *map = &card->codec_conf[i];
1052
		if (map->of_node && component->dev->of_node != map->of_node)
1053
			continue;
1054
		if (map->dev_name && strcmp(component->name, map->dev_name))
1055
			continue;
1056
		component->name_prefix = map->name_prefix;
1057
		break;
1058 1059 1060
	}
}

1061 1062
static int soc_probe_component(struct snd_soc_card *card,
	struct snd_soc_component *component)
1063
{
1064
	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
1065
	struct snd_soc_dai *dai;
1066
	int ret;
1067

1068 1069
	if (component->probed)
		return 0;
1070

1071 1072 1073
	component->card = card;
	dapm->card = card;
	soc_set_name_prefix(card, component);
1074

1075
	if (!try_module_get(component->dev->driver->owner))
1076 1077
		return -ENODEV;

1078
	soc_init_component_debugfs(component);
1079

1080 1081 1082
	if (component->dapm_widgets) {
		ret = snd_soc_dapm_new_controls(dapm, component->dapm_widgets,
			component->num_dapm_widgets);
1083 1084

		if (ret != 0) {
1085
			dev_err(component->dev,
1086 1087 1088 1089
				"Failed to create new controls %d\n", ret);
			goto err_probe;
		}
	}
1090

1091 1092
	list_for_each_entry(dai, &component->dai_list, list) {
		ret = snd_soc_dapm_new_dai_widgets(dapm, dai);
1093
		if (ret != 0) {
1094
			dev_err(component->dev,
1095 1096 1097 1098
				"Failed to create DAI widgets %d\n", ret);
			goto err_probe;
		}
	}
1099

1100 1101
	if (component->probe) {
		ret = component->probe(component);
1102
		if (ret < 0) {
1103 1104
			dev_err(component->dev,
				"ASoC: failed to probe component %d\n", ret);
1105
			goto err_probe;
1106
		}
1107

1108 1109 1110 1111
		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);
1112 1113
	}

1114 1115 1116 1117 1118 1119
	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);
1120

1121 1122
	component->probed = 1;
	list_add(&dapm->list, &card->dapm_list);
1123

1124 1125 1126
	/* This is a HACK and will be removed soon */
	if (component->codec)
		list_add(&component->codec->card_list, &card->codec_dev_list);
1127 1128 1129 1130

	return 0;

err_probe:
1131 1132
	soc_cleanup_component_debugfs(component);
	module_put(component->dev->driver->owner);
1133 1134 1135 1136

	return ret;
}

1137 1138 1139 1140
static void rtd_release(struct device *dev)
{
	kfree(dev);
}
1141

1142 1143
static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
	const char *name)
1144
{
1145 1146 1147
	int ret = 0;

	/* register the rtd device */
1148 1149 1150 1151
	rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
	if (!rtd->dev)
		return -ENOMEM;
	device_initialize(rtd->dev);
1152
	rtd->dev->parent = rtd->card->dev;
1153
	rtd->dev->release = rtd_release;
1154
	rtd->dev->groups = soc_dev_attr_groups;
1155
	dev_set_name(rtd->dev, "%s", name);
1156
	dev_set_drvdata(rtd->dev, rtd);
L
Liam Girdwood 已提交
1157
	mutex_init(&rtd->pcm_mutex);
1158 1159 1160 1161
	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);
1162
	ret = device_add(rtd->dev);
1163
	if (ret < 0) {
1164 1165
		/* calling put_device() here to free the rtd->dev */
		put_device(rtd->dev);
1166
		dev_err(rtd->card->dev,
1167
			"ASoC: failed to register runtime device: %d\n", ret);
1168 1169 1170 1171 1172 1173
		return ret;
	}
	rtd->dev_registered = 1;
	return 0;
}

1174 1175 1176 1177 1178
static int soc_probe_link_components(struct snd_soc_card *card, int num,
				     int order)
{
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
	struct snd_soc_platform *platform = rtd->platform;
1179
	struct snd_soc_component *component;
1180
	int i, ret;
1181 1182

	/* probe the CPU-side component, if it is a CODEC */
1183
	component = rtd->cpu_dai->component;
1184
	if (component->driver->probe_order == order) {
1185
		ret = soc_probe_component(card, component);
1186 1187 1188 1189
		if (ret < 0)
			return ret;
	}

1190 1191
	/* probe the CODEC-side components */
	for (i = 0; i < rtd->num_codecs; i++) {
1192
		component = rtd->codec_dais[i]->component;
1193
		if (component->driver->probe_order == order) {
1194
			ret = soc_probe_component(card, component);
1195 1196 1197
			if (ret < 0)
				return ret;
		}
1198 1199 1200
	}

	/* probe the platform */
1201
	if (platform->component.driver->probe_order == order) {
1202
		ret = soc_probe_component(card, &platform->component);
1203 1204 1205 1206 1207 1208 1209
		if (ret < 0)
			return ret;
	}

	return 0;
}

1210
static int soc_probe_dai(struct snd_soc_dai *dai, int order)
1211 1212 1213
{
	int ret;

1214 1215 1216
	if (!dai->probed && dai->driver->probe_order == order) {
		if (dai->driver->probe) {
			ret = dai->driver->probe(dai);
1217
			if (ret < 0) {
1218 1219 1220
				dev_err(dai->dev,
					"ASoC: failed to probe DAI %s: %d\n",
					dai->name, ret);
1221 1222 1223 1224
				return ret;
			}
		}

1225
		dai->probed = 1;
1226 1227 1228 1229 1230
	}

	return 0;
}

1231 1232
static int soc_link_dai_widgets(struct snd_soc_card *card,
				struct snd_soc_dai_link *dai_link,
1233
				struct snd_soc_pcm_runtime *rtd)
1234
{
1235 1236
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
1237 1238 1239
	struct snd_soc_dapm_widget *play_w, *capture_w;
	int ret;

1240 1241 1242
	if (rtd->num_codecs > 1)
		dev_warn(card->dev, "ASoC: Multiple codecs not supported yet\n");

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
	/* link the DAI widgets */
	play_w = codec_dai->playback_widget;
	capture_w = cpu_dai->capture_widget;
	if (play_w && capture_w) {
		ret = snd_soc_dapm_new_pcm(card, dai_link->params,
					   capture_w, play_w);
		if (ret != 0) {
			dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
				play_w->name, capture_w->name, ret);
			return ret;
		}
	}

	play_w = cpu_dai->playback_widget;
	capture_w = codec_dai->capture_widget;
	if (play_w && capture_w) {
		ret = snd_soc_dapm_new_pcm(card, dai_link->params,
					   capture_w, play_w);
		if (ret != 0) {
			dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
				play_w->name, capture_w->name, ret);
			return ret;
		}
	}

	return 0;
}

1271
static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1272 1273 1274
{
	struct snd_soc_dai_link *dai_link = &card->dai_link[num];
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
1275
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
1276
	int i, ret;
1277

1278
	dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1279
			card->name, num, order);
1280 1281 1282 1283

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

1284 1285 1286
	ret = soc_probe_dai(cpu_dai, order);
	if (ret)
		return ret;
F
Frank Mandarino 已提交
1287

1288
	/* probe the CODEC DAI */
1289
	for (i = 0; i < rtd->num_codecs; i++) {
1290
		ret = soc_probe_dai(rtd->codec_dais[i], order);
1291 1292 1293
		if (ret)
			return ret;
	}
M
Mark Brown 已提交
1294

1295 1296 1297 1298
	/* complete DAI probe during last probe */
	if (order != SND_SOC_COMP_ORDER_LAST)
		return 0;

1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309
	/* 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;
		}
	}

	ret = soc_post_component_init(rtd, dai_link->name);
1310
	if (ret)
1311
		return ret;
M
Mark Brown 已提交
1312

1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325
#ifdef CONFIG_DEBUG_FS
	/* add DPCM sysfs entries */
	if (dai_link->dynamic) {
		ret = soc_dpcm_debugfs_add(rtd);
		if (ret < 0) {
			dev_err(rtd->dev,
				"ASoC: failed to add dpcm sysfs entries: %d\n",
				ret);
			return ret;
		}
	}
#endif

1326 1327 1328
	if (cpu_dai->driver->compress_dai) {
		/*create compress_device"*/
		ret = soc_new_compress(rtd, num);
1329
		if (ret < 0) {
1330
			dev_err(card->dev, "ASoC: can't create compress %s\n",
1331
					 dai_link->stream_name);
1332 1333 1334
			return ret;
		}
	} else {
1335 1336 1337 1338 1339

		if (!dai_link->params) {
			/* create the pcm */
			ret = soc_new_pcm(rtd, num);
			if (ret < 0) {
1340
				dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1341
				       dai_link->stream_name, ret);
1342 1343
				return ret;
			}
1344
		} else {
1345 1346 1347
			INIT_DELAYED_WORK(&rtd->delayed_work,
						codec2codec_close_delayed_work);

1348
			/* link the DAI widgets */
1349
			ret = soc_link_dai_widgets(card, dai_link, rtd);
1350 1351
			if (ret)
				return ret;
1352
		}
1353 1354 1355 1356 1357
	}

	return 0;
}

1358
static int soc_bind_aux_dev(struct snd_soc_card *card, int num)
1359
{
1360
	struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1361
	struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1362
	const char *name = aux_dev->codec_name;
1363

1364 1365
	rtd->component = soc_find_component(aux_dev->codec_of_node, name);
	if (!rtd->component) {
1366
		if (aux_dev->codec_of_node)
1367
			name = of_node_full_name(aux_dev->codec_of_node);
1368

1369
		dev_err(card->dev, "ASoC: %s not registered\n", name);
1370 1371
		return -EPROBE_DEFER;
	}
1372

1373 1374 1375 1376 1377 1378 1379
	/*
	 * Some places still reference rtd->codec, so we have to keep that
	 * initialized if the component is a CODEC. Once all those references
	 * have been removed, this code can be removed as well.
	 */
	 rtd->codec = rtd->component->codec;

1380
	return 0;
1381 1382
}

1383 1384
static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
{
1385
	struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1386
	struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
1387
	int ret;
1388

1389
	ret = soc_probe_component(card, rtd->component);
1390
	if (ret < 0)
1391
		return ret;
1392

1393 1394
	/* do machine specific initialization */
	if (aux_dev->init) {
1395
		ret = aux_dev->init(rtd->component);
1396 1397 1398 1399 1400 1401
		if (ret < 0) {
			dev_err(card->dev, "ASoC: failed to init %s: %d\n",
				aux_dev->name, ret);
			return ret;
		}
	}
1402

1403
	return soc_post_component_init(rtd, aux_dev->name);
1404 1405 1406 1407 1408
}

static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
{
	struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
1409
	struct snd_soc_component *component = rtd->component;
1410 1411 1412

	/* unregister the rtd device */
	if (rtd->dev_registered) {
1413
		device_remove_file(rtd->dev, &dev_attr_codec_reg);
1414
		device_unregister(rtd->dev);
1415 1416 1417
		rtd->dev_registered = 0;
	}

1418 1419
	if (component && component->probed)
		soc_remove_component(component);
1420 1421
}

1422
static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1423 1424 1425 1426 1427 1428 1429 1430
{
	int ret;

	if (codec->cache_init)
		return 0;

	ret = snd_soc_cache_init(codec);
	if (ret < 0) {
1431 1432 1433
		dev_err(codec->dev,
			"ASoC: Failed to set cache compression type: %d\n",
			ret);
1434 1435 1436 1437 1438 1439
		return ret;
	}
	codec->cache_init = 1;
	return 0;
}

1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503
/**
 * 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;
}
1504
EXPORT_SYMBOL_GPL(snd_soc_runtime_set_dai_fmt);
1505

1506
static int snd_soc_instantiate_card(struct snd_soc_card *card)
1507
{
1508
	struct snd_soc_codec *codec;
1509
	int ret, i, order;
M
Mark Brown 已提交
1510

1511
	mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1512

1513
	/* bind DAIs */
1514 1515 1516 1517 1518
	for (i = 0; i < card->num_links; i++) {
		ret = soc_bind_dai_link(card, i);
		if (ret != 0)
			goto base_error;
	}
M
Mark Brown 已提交
1519

1520
	/* bind aux_devs too */
1521
	for (i = 0; i < card->num_aux_devs; i++) {
1522
		ret = soc_bind_aux_dev(card, i);
1523 1524
		if (ret != 0)
			goto base_error;
1525
	}
1526

1527 1528 1529 1530
	/* initialize the register cache for each available codec */
	list_for_each_entry(codec, &codec_list, list) {
		if (codec->cache_init)
			continue;
1531
		ret = snd_soc_init_codec_cache(codec);
1532 1533
		if (ret < 0)
			goto base_error;
1534 1535
	}

1536
	/* card bind complete so register a sound card */
1537
	ret = snd_card_new(card->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
1538 1539
			card->owner, 0, &card->snd_card);
	if (ret < 0) {
1540 1541 1542
		dev_err(card->dev,
			"ASoC: can't create sound card for card %s: %d\n",
			card->name, ret);
1543
		goto base_error;
1544 1545
	}

M
Mark Brown 已提交
1546 1547 1548 1549 1550
	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);

1551 1552 1553 1554
#ifdef CONFIG_DEBUG_FS
	snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
#endif

1555
#ifdef CONFIG_PM_SLEEP
1556 1557 1558
	/* deferred resume work */
	INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
#endif
F
Frank Mandarino 已提交
1559

1560 1561 1562 1563
	if (card->dapm_widgets)
		snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
					  card->num_dapm_widgets);

1564 1565
	/* initialise the sound card only once */
	if (card->probe) {
1566
		ret = card->probe(card);
1567 1568 1569
		if (ret < 0)
			goto card_probe_error;
	}
M
Mark Brown 已提交
1570

1571
	/* probe all components used by DAI links on this card */
1572 1573 1574
	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
			order++) {
		for (i = 0; i < card->num_links; i++) {
1575
			ret = soc_probe_link_components(card, i, order);
1576
			if (ret < 0) {
1577 1578 1579
				dev_err(card->dev,
					"ASoC: failed to instantiate card %d\n",
					ret);
1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590
				goto probe_dai_err;
			}
		}
	}

	/* probe all DAI links on this card */
	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
			order++) {
		for (i = 0; i < card->num_links; i++) {
			ret = soc_probe_link_dais(card, i, order);
			if (ret < 0) {
1591 1592 1593
				dev_err(card->dev,
					"ASoC: failed to instantiate card %d\n",
					ret);
1594 1595
				goto probe_dai_err;
			}
1596 1597
		}
	}
F
Frank Mandarino 已提交
1598

1599 1600 1601
	for (i = 0; i < card->num_aux_devs; i++) {
		ret = soc_probe_aux_dev(card, i);
		if (ret < 0) {
1602 1603 1604
			dev_err(card->dev,
				"ASoC: failed to add auxiliary devices %d\n",
				ret);
1605 1606 1607 1608
			goto probe_aux_dev_err;
		}
	}

1609
	snd_soc_dapm_link_dai_widgets(card);
1610
	snd_soc_dapm_connect_dai_link_widgets(card);
1611

1612
	if (card->controls)
1613
		snd_soc_add_card_controls(card, card->controls, card->num_controls);
1614

1615 1616 1617 1618
	if (card->dapm_routes)
		snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
					card->num_dapm_routes);

1619
	for (i = 0; i < card->num_links; i++) {
1620 1621 1622
		if (card->dai_link[i].dai_fmt)
			snd_soc_runtime_set_dai_fmt(&card->rtd[i],
				card->dai_link[i].dai_fmt);
1623 1624
	}

1625 1626
	snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
		 "%s", card->name);
1627 1628
	snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
		 "%s", card->long_name ? card->long_name : card->name);
1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642
	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;
		}
	}
1643

1644 1645 1646
	if (card->late_probe) {
		ret = card->late_probe(card);
		if (ret < 0) {
1647
			dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1648 1649 1650 1651 1652
				card->name, ret);
			goto probe_aux_dev_err;
		}
	}

1653
	snd_soc_dapm_new_widgets(card);
1654

1655 1656
	ret = snd_card_register(card->snd_card);
	if (ret < 0) {
1657 1658
		dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
				ret);
1659
		goto probe_aux_dev_err;
F
Frank Mandarino 已提交
1660 1661
	}

1662
	card->instantiated = 1;
1663
	snd_soc_dapm_sync(&card->dapm);
1664
	mutex_unlock(&card->mutex);
1665 1666

	return 0;
1667

1668 1669 1670 1671
probe_aux_dev_err:
	for (i = 0; i < card->num_aux_devs; i++)
		soc_remove_aux_dev(card, i);

1672
probe_dai_err:
1673
	soc_remove_dai_links(card);
1674 1675

card_probe_error:
1676
	if (card->remove)
1677
		card->remove(card);
1678 1679 1680

	snd_card_free(card->snd_card);

1681
base_error:
1682
	mutex_unlock(&card->mutex);
F
Frank Mandarino 已提交
1683

1684
	return ret;
1685 1686 1687 1688 1689
}

/* probes a new socdev */
static int soc_probe(struct platform_device *pdev)
{
1690
	struct snd_soc_card *card = platform_get_drvdata(pdev);
1691

1692 1693 1694 1695 1696 1697 1698
	/*
	 * no card, so machine driver should be registering card
	 * we should not be here in that case so ret error
	 */
	if (!card)
		return -EINVAL;

1699
	dev_warn(&pdev->dev,
1700
		 "ASoC: machine %s should use snd_soc_register_card()\n",
1701 1702
		 card->name);

1703 1704
	/* Bodge while we unpick instantiation */
	card->dev = &pdev->dev;
1705

1706
	return snd_soc_register_card(card);
F
Frank Mandarino 已提交
1707 1708
}

1709
static int soc_cleanup_card_resources(struct snd_soc_card *card)
F
Frank Mandarino 已提交
1710 1711 1712
{
	int i;

1713 1714 1715
	/* make sure any delayed work runs */
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1716
		flush_delayed_work(&rtd->delayed_work);
1717
	}
1718

1719 1720 1721
	/* remove auxiliary devices */
	for (i = 0; i < card->num_aux_devs; i++)
		soc_remove_aux_dev(card, i);
F
Frank Mandarino 已提交
1722

1723
	/* remove and free each DAI */
1724
	soc_remove_dai_links(card);
1725

1726
	soc_cleanup_card_debugfs(card);
1727

1728 1729
	/* remove the card */
	if (card->remove)
1730
		card->remove(card);
1731

1732 1733
	snd_soc_dapm_free(&card->dapm);

1734 1735 1736 1737 1738 1739 1740 1741 1742
	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
1743

M
Mark Brown 已提交
1744
	snd_soc_unregister_card(card);
F
Frank Mandarino 已提交
1745 1746 1747
	return 0;
}

1748
int snd_soc_poweroff(struct device *dev)
M
Mark Brown 已提交
1749
{
1750
	struct snd_soc_card *card = dev_get_drvdata(dev);
1751
	int i;
M
Mark Brown 已提交
1752 1753

	if (!card->instantiated)
M
Mark Brown 已提交
1754
		return 0;
M
Mark Brown 已提交
1755 1756 1757

	/* Flush out pmdown_time work - we actually do want to run it
	 * now, we're shutting down so no imminent restart. */
1758 1759
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1760
		flush_delayed_work(&rtd->delayed_work);
1761
	}
M
Mark Brown 已提交
1762

1763
	snd_soc_dapm_shutdown(card);
M
Mark Brown 已提交
1764

1765 1766
	/* deactivate pins to sleep state */
	for (i = 0; i < card->num_rtd; i++) {
1767 1768 1769 1770
		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
		int j;

1771
		pinctrl_pm_select_sleep_state(cpu_dai->dev);
1772 1773 1774 1775
		for (j = 0; j < rtd->num_codecs; j++) {
			struct snd_soc_dai *codec_dai = rtd->codec_dais[j];
			pinctrl_pm_select_sleep_state(codec_dai->dev);
		}
1776 1777
	}

M
Mark Brown 已提交
1778
	return 0;
M
Mark Brown 已提交
1779
}
1780
EXPORT_SYMBOL_GPL(snd_soc_poweroff);
M
Mark Brown 已提交
1781

1782
const struct dev_pm_ops snd_soc_pm_ops = {
1783 1784 1785 1786
	.suspend = snd_soc_suspend,
	.resume = snd_soc_resume,
	.freeze = snd_soc_suspend,
	.thaw = snd_soc_resume,
1787
	.poweroff = snd_soc_poweroff,
1788
	.restore = snd_soc_resume,
M
Mark Brown 已提交
1789
};
1790
EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
M
Mark Brown 已提交
1791

F
Frank Mandarino 已提交
1792 1793 1794 1795
/* ASoC platform driver */
static struct platform_driver soc_driver = {
	.driver		= {
		.name		= "soc-audio",
1796
		.pm		= &snd_soc_pm_ops,
F
Frank Mandarino 已提交
1797 1798 1799 1800 1801 1802 1803 1804 1805
	},
	.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
1806
 * @long_name: control long name
1807
 * @prefix: control name prefix
F
Frank Mandarino 已提交
1808 1809 1810 1811 1812 1813
 *
 * 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,
1814
				  void *data, const char *long_name,
1815
				  const char *prefix)
F
Frank Mandarino 已提交
1816 1817
{
	struct snd_kcontrol_new template;
1818 1819
	struct snd_kcontrol *kcontrol;
	char *name = NULL;
F
Frank Mandarino 已提交
1820 1821 1822 1823

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

1824 1825 1826 1827
	if (!long_name)
		long_name = template.name;

	if (prefix) {
1828
		name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841
		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
1842 1843 1844
}
EXPORT_SYMBOL_GPL(snd_soc_cnew);

1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855
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) {
1856 1857
			dev_err(dev, "ASoC: Failed to add %s: %d\n",
				control->name, err);
1858 1859 1860 1861 1862 1863 1864
			return err;
		}
	}

	return 0;
}

1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880
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);

1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899
/**
 * 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
1900
/**
1901 1902
 * 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
1903 1904 1905 1906 1907 1908 1909 1910
 * 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.
 */
1911
int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
1912
	const struct snd_kcontrol_new *controls, unsigned int num_controls)
I
Ian Molton 已提交
1913
{
1914 1915
	return snd_soc_add_component_controls(&codec->component, controls,
		num_controls);
I
Ian Molton 已提交
1916
}
1917
EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
I
Ian Molton 已提交
1918

1919 1920
/**
 * snd_soc_add_platform_controls - add an array of controls to a platform.
1921
 * Convenience function to add a list of controls.
1922 1923 1924 1925 1926 1927 1928 1929
 *
 * @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,
1930
	const struct snd_kcontrol_new *controls, unsigned int num_controls)
1931
{
1932 1933
	return snd_soc_add_component_controls(&platform->component, controls,
		num_controls);
1934 1935 1936
}
EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);

1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969
/**
 * 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)
{
1970
	struct snd_card *card = dai->component->card->snd_card;
1971 1972 1973 1974 1975 1976

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

1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988
/**
 * 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)
{
1989 1990
	if (dai->driver && dai->driver->ops->set_sysclk)
		return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
1991
	else if (dai->codec && dai->codec->driver->set_sysclk)
1992
		return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
1993
						      freq, dir);
1994
	else
1995
		return -ENOTSUPP;
1996 1997 1998
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);

1999 2000 2001 2002
/**
 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
 * @codec: CODEC
 * @clk_id: DAI specific clock ID
2003
 * @source: Source for the clock
2004 2005 2006 2007 2008 2009
 * @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,
2010
			     int source, unsigned int freq, int dir)
2011 2012
{
	if (codec->driver->set_sysclk)
2013 2014
		return codec->driver->set_sysclk(codec, clk_id, source,
						 freq, dir);
2015
	else
2016
		return -ENOTSUPP;
2017 2018 2019
}
EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);

2020 2021 2022
/**
 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
 * @dai: DAI
M
Mark Brown 已提交
2023
 * @div_id: DAI specific clock divider ID
2024 2025 2026 2027 2028 2029 2030 2031 2032
 * @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)
{
2033 2034
	if (dai->driver && dai->driver->ops->set_clkdiv)
		return dai->driver->ops->set_clkdiv(dai, div_id, div);
2035 2036 2037 2038 2039 2040 2041 2042 2043
	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
2044
 * @source: DAI specific source for the PLL
2045 2046 2047 2048 2049
 * @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.
 */
2050 2051
int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
	unsigned int freq_in, unsigned int freq_out)
2052
{
2053 2054
	if (dai->driver && dai->driver->ops->set_pll)
		return dai->driver->ops->set_pll(dai, pll_id, source,
2055
					 freq_in, freq_out);
2056 2057 2058
	else if (dai->codec && dai->codec->driver->set_pll)
		return dai->codec->driver->set_pll(dai->codec, pll_id, source,
						   freq_in, freq_out);
2059 2060 2061 2062 2063
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);

2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084
/*
 * 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);

2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100
/**
 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
 * @dai: DAI
 * @ratio Ratio of BCLK to Sample rate.
 *
 * 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);

2101 2102 2103 2104 2105 2106 2107 2108 2109
/**
 * 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)
{
2110
	if (dai->driver == NULL)
2111
		return -EINVAL;
2112 2113 2114
	if (dai->driver->ops->set_fmt == NULL)
		return -ENOTSUPP;
	return dai->driver->ops->set_fmt(dai, fmt);
2115 2116 2117
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);

2118
/**
2119
 * snd_soc_xlate_tdm_slot - generate tx/rx slot mask.
2120 2121 2122 2123 2124 2125
 * @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.
 */
2126
static int snd_soc_xlate_tdm_slot_mask(unsigned int slots,
2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141
					  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;
}

2142
/**
2143 2144
 * snd_soc_dai_set_tdm_slot() - Configures a DAI for TDM operation
 * @dai: The DAI to configure
2145 2146
 * @tx_mask: bitmask representing active TX slots.
 * @rx_mask: bitmask representing active RX slots.
2147
 * @slots: Number of slots in use.
2148
 * @slot_width: Width in bits for each slot.
2149
 *
2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163
 * 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.
2164 2165
 */
int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2166
	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2167
{
2168 2169
	if (dai->driver && dai->driver->ops->xlate_tdm_slot_mask)
		dai->driver->ops->xlate_tdm_slot_mask(slots,
2170 2171
						&tx_mask, &rx_mask);
	else
2172
		snd_soc_xlate_tdm_slot_mask(slots, &tx_mask, &rx_mask);
2173

2174 2175 2176
	dai->tx_mask = tx_mask;
	dai->rx_mask = rx_mask;

2177 2178
	if (dai->driver && dai->driver->ops->set_tdm_slot)
		return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2179
				slots, slot_width);
2180
	else
2181
		return -ENOTSUPP;
2182 2183 2184
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);

2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200
/**
 * 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)
{
2201 2202
	if (dai->driver && dai->driver->ops->set_channel_map)
		return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2203 2204 2205 2206 2207 2208
			rx_num, rx_slot);
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);

2209 2210 2211 2212 2213 2214 2215 2216 2217
/**
 * 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)
{
2218 2219
	if (dai->driver && dai->driver->ops->set_tristate)
		return dai->driver->ops->set_tristate(dai, tristate);
2220 2221 2222 2223 2224 2225 2226 2227 2228
	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
2229
 * @direction: stream to mute
2230 2231 2232
 *
 * Mutes the DAI DAC.
 */
2233 2234
int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
			     int direction)
2235
{
2236 2237 2238 2239 2240 2241 2242
	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)
2243
		return dai->driver->ops->digital_mute(dai, mute);
2244
	else
2245
		return -ENOTSUPP;
2246 2247 2248
}
EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);

2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275
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;
}

M
Mark Brown 已提交
2276 2277 2278
/**
 * snd_soc_register_card - Register a card with the ASoC core
 *
M
Mark Brown 已提交
2279
 * @card: Card to register
M
Mark Brown 已提交
2280 2281
 *
 */
2282
int snd_soc_register_card(struct snd_soc_card *card)
M
Mark Brown 已提交
2283
{
2284
	int i, j, ret;
2285

M
Mark Brown 已提交
2286 2287 2288
	if (!card->name || !card->dev)
		return -EINVAL;

2289 2290 2291
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai_link *link = &card->dai_link[i];

2292 2293 2294 2295
		ret = snd_soc_init_multicodec(card, link);
		if (ret) {
			dev_err(card->dev, "ASoC: failed to init multicodec\n");
			return ret;
2296
		}
2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314

		for (j = 0; j < link->num_codecs; j++) {
			/*
			 * Codec must be specified by 1 of name or OF node,
			 * not both or neither.
			 */
			if (!!link->codecs[j].name ==
			    !!link->codecs[j].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[j].dai_name) {
				dev_err(card->dev, "ASoC: codec_dai_name not set for %s\n",
					link->name);
				return -EINVAL;
			}
2315
		}
2316 2317 2318 2319 2320 2321

		/*
		 * 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) {
2322 2323 2324
			dev_err(card->dev,
				"ASoC: Both platform name/of_node are set for %s\n",
				link->name);
2325 2326 2327 2328
			return -EINVAL;
		}

		/*
2329 2330 2331 2332 2333
		 * 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) {
2334 2335 2336
			dev_err(card->dev,
				"ASoC: Neither/both cpu name/of_node are set for %s\n",
				link->name);
2337 2338 2339 2340 2341
			return -EINVAL;
		}
		/*
		 * At least one of CPU DAI name or CPU device name/node must be
		 * specified
2342
		 */
2343 2344
		if (!link->cpu_dai_name &&
		    !(link->cpu_name || link->cpu_of_node)) {
2345 2346 2347
			dev_err(card->dev,
				"ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
				link->name);
2348 2349 2350 2351
			return -EINVAL;
		}
	}

M
Mark Brown 已提交
2352 2353
	dev_set_drvdata(card->dev, card);

2354 2355
	snd_soc_initialize_card_lists(card);

2356 2357
	soc_init_card_debugfs(card);

2358 2359 2360 2361
	card->rtd = devm_kzalloc(card->dev,
				 sizeof(struct snd_soc_pcm_runtime) *
				 (card->num_links + card->num_aux_devs),
				 GFP_KERNEL);
2362 2363
	if (card->rtd == NULL)
		return -ENOMEM;
2364
	card->num_rtd = 0;
2365
	card->rtd_aux = &card->rtd[card->num_links];
2366

2367 2368
	for (i = 0; i < card->num_links; i++) {
		card->rtd[i].card = card;
2369
		card->rtd[i].dai_link = &card->dai_link[i];
2370 2371 2372 2373 2374 2375
		card->rtd[i].codec_dais = devm_kzalloc(card->dev,
					sizeof(struct snd_soc_dai *) *
					(card->rtd[i].dai_link->num_codecs),
					GFP_KERNEL);
		if (card->rtd[i].codec_dais == NULL)
			return -ENOMEM;
2376 2377 2378 2379
	}

	for (i = 0; i < card->num_aux_devs; i++)
		card->rtd_aux[i].card = card;
2380

2381
	INIT_LIST_HEAD(&card->dapm_dirty);
M
Mark Brown 已提交
2382
	card->instantiated = 0;
2383
	mutex_init(&card->mutex);
2384
	mutex_init(&card->dapm_mutex);
M
Mark Brown 已提交
2385

2386 2387 2388
	ret = snd_soc_instantiate_card(card);
	if (ret != 0)
		soc_cleanup_card_debugfs(card);
M
Mark Brown 已提交
2389

2390 2391
	/* deactivate pins to sleep state */
	for (i = 0; i < card->num_rtd; i++) {
2392 2393 2394 2395 2396 2397 2398 2399 2400 2401
		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
		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);
		}

2402 2403 2404 2405
		if (!cpu_dai->active)
			pinctrl_pm_select_sleep_state(cpu_dai->dev);
	}

2406
	return ret;
M
Mark Brown 已提交
2407
}
2408
EXPORT_SYMBOL_GPL(snd_soc_register_card);
M
Mark Brown 已提交
2409 2410 2411 2412

/**
 * snd_soc_unregister_card - Unregister a card with the ASoC core
 *
M
Mark Brown 已提交
2413
 * @card: Card to unregister
M
Mark Brown 已提交
2414 2415
 *
 */
2416
int snd_soc_unregister_card(struct snd_soc_card *card)
M
Mark Brown 已提交
2417
{
2418 2419
	if (card->instantiated) {
		card->instantiated = false;
2420
		snd_soc_dapm_shutdown(card);
2421
		soc_cleanup_card_resources(card);
2422
		dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
2423
	}
M
Mark Brown 已提交
2424 2425 2426

	return 0;
}
2427
EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
M
Mark Brown 已提交
2428

2429 2430 2431 2432
/*
 * Simplify DAI link configuration by removing ".-1" from device names
 * and sanitizing names.
 */
2433
static char *fmt_single_name(struct device *dev, int *id)
2434 2435 2436 2437 2438 2439 2440
{
	char *found, name[NAME_SIZE];
	int id1, id2;

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

2441
	strlcpy(name, dev_name(dev), NAME_SIZE);
2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459

	/* 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 */
2460
			*id = ((id1 & 0xffff) << 16) + id2;
2461 2462 2463

			/* sanitize component name for DAI link creation */
			snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
2464
			strlcpy(name, tmp, NAME_SIZE);
2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479
		} 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) {
2480 2481 2482
		dev_err(dev,
			"ASoC: error - multiple DAI %s registered with no name\n",
			dev_name(dev));
2483 2484 2485 2486 2487 2488
		return NULL;
	}

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

M
Mark Brown 已提交
2489
/**
2490
 * snd_soc_unregister_dai - Unregister DAIs from the ASoC core
M
Mark Brown 已提交
2491
 *
2492
 * @component: The component for which the DAIs should be unregistered
M
Mark Brown 已提交
2493
 */
2494
static void snd_soc_unregister_dais(struct snd_soc_component *component)
M
Mark Brown 已提交
2495
{
L
Lars-Peter Clausen 已提交
2496
	struct snd_soc_dai *dai, *_dai;
M
Mark Brown 已提交
2497

L
Lars-Peter Clausen 已提交
2498
	list_for_each_entry_safe(dai, _dai, &component->dai_list, list) {
2499 2500
		dev_dbg(component->dev, "ASoC: Unregistered DAI '%s'\n",
			dai->name);
L
Lars-Peter Clausen 已提交
2501
		list_del(&dai->list);
2502
		kfree(dai->name);
2503 2504
		kfree(dai);
	}
M
Mark Brown 已提交
2505 2506 2507
}

/**
2508
 * snd_soc_register_dais - Register a DAI with the ASoC core
M
Mark Brown 已提交
2509
 *
2510 2511
 * @component: The component the DAIs are registered for
 * @dai_drv: DAI driver to use for the DAIs
M
Mark Brown 已提交
2512
 * @count: Number of DAIs
2513 2514
 * @legacy_dai_naming: Use the legacy naming scheme and let the DAI inherit the
 *                     parent's name.
M
Mark Brown 已提交
2515
 */
2516
static int snd_soc_register_dais(struct snd_soc_component *component,
2517 2518
	struct snd_soc_dai_driver *dai_drv, size_t count,
	bool legacy_dai_naming)
M
Mark Brown 已提交
2519
{
2520
	struct device *dev = component->dev;
2521
	struct snd_soc_dai *dai;
2522 2523
	unsigned int i;
	int ret;
2524

2525
	dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
M
Mark Brown 已提交
2526

2527 2528 2529
	component->dai_drv = dai_drv;
	component->num_dai = count;

M
Mark Brown 已提交
2530
	for (i = 0; i < count; i++) {
2531 2532

		dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
2533 2534 2535 2536
		if (dai == NULL) {
			ret = -ENOMEM;
			goto err;
		}
2537

2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554
		/*
		 * 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 (count == 1 && legacy_dai_naming) {
			dai->name = fmt_single_name(dev, &dai->id);
		} else {
			dai->name = fmt_multiple_name(dev, &dai_drv[i]);
			if (dai_drv[i].id)
				dai->id = dai_drv[i].id;
			else
				dai->id = i;
		}
2555 2556
		if (dai->name == NULL) {
			kfree(dai);
2557
			ret = -ENOMEM;
M
Mark Brown 已提交
2558
			goto err;
2559 2560
		}

2561
		dai->component = component;
2562 2563 2564 2565 2566
		dai->dev = dev;
		dai->driver = &dai_drv[i];
		if (!dai->driver->ops)
			dai->driver->ops = &null_dai_ops;

2567
		list_add(&dai->list, &component->dai_list);
2568

2569
		dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
M
Mark Brown 已提交
2570 2571 2572 2573 2574
	}

	return 0;

err:
2575
	snd_soc_unregister_dais(component);
M
Mark Brown 已提交
2576 2577 2578 2579

	return ret;
}

2580 2581
static void snd_soc_component_seq_notifier(struct snd_soc_dapm_context *dapm,
	enum snd_soc_dapm_type type, int subseq)
2582
{
2583
	struct snd_soc_component *component = dapm->component;
2584

2585 2586
	component->driver->seq_notifier(component, type, subseq);
}
2587

2588 2589 2590 2591
static int snd_soc_component_stream_event(struct snd_soc_dapm_context *dapm,
	int event)
{
	struct snd_soc_component *component = dapm->component;
2592

2593 2594
	return component->driver->stream_event(component, event);
}
2595

2596 2597
static int snd_soc_component_initialize(struct snd_soc_component *component,
	const struct snd_soc_component_driver *driver, struct device *dev)
2598
{
2599 2600
	struct snd_soc_dapm_context *dapm;

2601 2602 2603
	component->name = fmt_single_name(dev, &component->id);
	if (!component->name) {
		dev_err(dev, "ASoC: Failed to allocate name\n");
2604 2605 2606
		return -ENOMEM;
	}

2607 2608
	component->dev = dev;
	component->driver = driver;
2609 2610
	component->probe = component->driver->probe;
	component->remove = component->driver->remove;
2611

2612 2613 2614 2615 2616 2617 2618
	if (!component->dapm_ptr)
		component->dapm_ptr = &component->dapm;

	dapm = component->dapm_ptr;
	dapm->dev = dev;
	dapm->component = component;
	dapm->bias_level = SND_SOC_BIAS_OFF;
2619
	dapm->idle_bias_off = true;
2620 2621 2622 2623
	if (driver->seq_notifier)
		dapm->seq_notifier = snd_soc_component_seq_notifier;
	if (driver->stream_event)
		dapm->stream_event = snd_soc_component_stream_event;
2624

2625 2626 2627 2628 2629 2630 2631
	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;

2632 2633
	INIT_LIST_HEAD(&component->dai_list);
	mutex_init(&component->io_mutex);
2634

2635 2636
	return 0;
}
2637

2638
static void snd_soc_component_setup_regmap(struct snd_soc_component *component)
2639
{
2640 2641 2642 2643 2644 2645 2646
	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;
}

2647 2648
#ifdef CONFIG_REGMAP

2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663
/**
 * 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);
2664
}
2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682
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);
2683

2684
#endif
2685

2686 2687
static void snd_soc_component_add_unlocked(struct snd_soc_component *component)
{
2688 2689 2690 2691 2692 2693
	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);
	}
2694

2695 2696
	list_add(&component->list, &component_list);
}
2697

2698 2699
static void snd_soc_component_add(struct snd_soc_component *component)
{
2700
	mutex_lock(&client_mutex);
2701
	snd_soc_component_add_unlocked(component);
2702
	mutex_unlock(&client_mutex);
2703
}
2704

2705 2706 2707 2708 2709
static void snd_soc_component_cleanup(struct snd_soc_component *component)
{
	snd_soc_unregister_dais(component);
	kfree(component->name);
}
2710

2711 2712 2713 2714
static void snd_soc_component_del_unlocked(struct snd_soc_component *component)
{
	list_del(&component->list);
}
2715

2716 2717 2718 2719 2720
static void snd_soc_component_del(struct snd_soc_component *component)
{
	mutex_lock(&client_mutex);
	snd_soc_component_del_unlocked(component);
	mutex_unlock(&client_mutex);
2721 2722 2723 2724 2725 2726 2727 2728
}

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;
2729
	int ret;
2730

2731
	cmpnt = kzalloc(sizeof(*cmpnt), GFP_KERNEL);
2732 2733 2734 2735 2736
	if (!cmpnt) {
		dev_err(dev, "ASoC: Failed to allocate memory\n");
		return -ENOMEM;
	}

2737 2738 2739 2740
	ret = snd_soc_component_initialize(cmpnt, cmpnt_drv, dev);
	if (ret)
		goto err_free;

2741
	cmpnt->ignore_pmdown_time = true;
2742
	cmpnt->registered_as_component = true;
2743

2744 2745 2746 2747 2748
	ret = snd_soc_register_dais(cmpnt, dai_drv, num_dai, true);
	if (ret < 0) {
		dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
		goto err_cleanup;
	}
2749

2750
	snd_soc_component_add(cmpnt);
2751

2752
	return 0;
2753

2754 2755 2756 2757 2758
err_cleanup:
	snd_soc_component_cleanup(cmpnt);
err_free:
	kfree(cmpnt);
	return ret;
2759
}
2760
EXPORT_SYMBOL_GPL(snd_soc_register_component);
2761

2762 2763 2764 2765 2766 2767 2768 2769 2770
/**
 * snd_soc_unregister_component - Unregister a component from the ASoC core
 *
 */
void snd_soc_unregister_component(struct device *dev)
{
	struct snd_soc_component *cmpnt;

	list_for_each_entry(cmpnt, &component_list, list) {
2771
		if (dev == cmpnt->dev && cmpnt->registered_as_component)
2772 2773 2774 2775 2776
			goto found;
	}
	return;

found:
2777 2778 2779
	snd_soc_component_del(cmpnt);
	snd_soc_component_cleanup(cmpnt);
	kfree(cmpnt);
2780 2781 2782
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_component);

2783
static int snd_soc_platform_drv_probe(struct snd_soc_component *component)
2784 2785
{
	struct snd_soc_platform *platform = snd_soc_component_to_platform(component);
2786

2787
	return platform->driver->probe(platform);
2788 2789
}

2790
static void snd_soc_platform_drv_remove(struct snd_soc_component *component)
2791 2792 2793
{
	struct snd_soc_platform *platform = snd_soc_component_to_platform(component);

2794
	platform->driver->remove(platform);
2795 2796
}

M
Mark Brown 已提交
2797
/**
2798 2799 2800 2801
 * snd_soc_add_platform - Add a platform to the ASoC core
 * @dev: The parent device for the platform
 * @platform: The platform to add
 * @platform_driver: The driver for the platform
M
Mark Brown 已提交
2802
 */
2803
int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
2804
		const struct snd_soc_platform_driver *platform_drv)
M
Mark Brown 已提交
2805
{
2806 2807
	int ret;

2808 2809 2810 2811
	ret = snd_soc_component_initialize(&platform->component,
			&platform_drv->component_driver, dev);
	if (ret)
		return ret;
M
Mark Brown 已提交
2812

2813 2814
	platform->dev = dev;
	platform->driver = platform_drv;
2815 2816 2817 2818 2819

	if (platform_drv->probe)
		platform->component.probe = snd_soc_platform_drv_probe;
	if (platform_drv->remove)
		platform->component.remove = snd_soc_platform_drv_remove;
M
Mark Brown 已提交
2820

2821 2822 2823
#ifdef CONFIG_DEBUG_FS
	platform->component.debugfs_prefix = "platform";
#endif
M
Mark Brown 已提交
2824 2825

	mutex_lock(&client_mutex);
2826
	snd_soc_component_add_unlocked(&platform->component);
M
Mark Brown 已提交
2827 2828 2829
	list_add(&platform->list, &platform_list);
	mutex_unlock(&client_mutex);

2830 2831
	dev_dbg(dev, "ASoC: Registered platform '%s'\n",
		platform->component.name);
M
Mark Brown 已提交
2832 2833 2834

	return 0;
}
2835
EXPORT_SYMBOL_GPL(snd_soc_add_platform);
M
Mark Brown 已提交
2836 2837

/**
2838
 * snd_soc_register_platform - Register a platform with the ASoC core
M
Mark Brown 已提交
2839
 *
2840
 * @platform: platform to register
M
Mark Brown 已提交
2841
 */
2842 2843
int snd_soc_register_platform(struct device *dev,
		const struct snd_soc_platform_driver *platform_drv)
M
Mark Brown 已提交
2844
{
2845
	struct snd_soc_platform *platform;
2846
	int ret;
2847

2848
	dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
2849

2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867
	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)
{
2868

M
Mark Brown 已提交
2869 2870
	mutex_lock(&client_mutex);
	list_del(&platform->list);
2871
	snd_soc_component_del_unlocked(&platform->component);
M
Mark Brown 已提交
2872 2873
	mutex_unlock(&client_mutex);

2874
	dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
2875
		platform->component.name);
2876 2877

	snd_soc_component_cleanup(&platform->component);
2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907
}
EXPORT_SYMBOL_GPL(snd_soc_remove_platform);

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

	list_for_each_entry(platform, &platform_list, list) {
		if (dev == platform->dev)
			return platform;
	}

	return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);

/**
 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
 *
 * @platform: platform to unregister
 */
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);
2908
	kfree(platform);
M
Mark Brown 已提交
2909 2910 2911
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);

2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944
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];
}

2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958
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);
}

2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976
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;
}

2977 2978 2979 2980 2981 2982 2983 2984
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
2985 2986 2987
/**
 * snd_soc_register_codec - Register a codec with the ASoC core
 *
M
Mark Brown 已提交
2988
 * @codec: codec to register
M
Mark Brown 已提交
2989
 */
2990
int snd_soc_register_codec(struct device *dev,
2991 2992 2993
			   const struct snd_soc_codec_driver *codec_drv,
			   struct snd_soc_dai_driver *dai_drv,
			   int num_dai)
M
Mark Brown 已提交
2994
{
2995
	struct snd_soc_codec *codec;
2996
	struct snd_soc_dai *dai;
2997
	int ret, i;
2998

2999 3000 3001 3002 3003
	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
3004

3005
	codec->component.dapm_ptr = &codec->dapm;
3006
	codec->component.codec = codec;
3007

3008 3009 3010 3011
	ret = snd_soc_component_initialize(&codec->component,
			&codec_drv->component_driver, dev);
	if (ret)
		goto err_free;
3012

3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029
	if (codec_drv->controls) {
		codec->component.controls = codec_drv->controls;
		codec->component.num_controls = codec_drv->num_controls;
	}
	if (codec_drv->dapm_widgets) {
		codec->component.dapm_widgets = codec_drv->dapm_widgets;
		codec->component.num_dapm_widgets = codec_drv->num_dapm_widgets;
	}
	if (codec_drv->dapm_routes) {
		codec->component.dapm_routes = codec_drv->dapm_routes;
		codec->component.num_dapm_routes = codec_drv->num_dapm_routes;
	}

	if (codec_drv->probe)
		codec->component.probe = snd_soc_codec_drv_probe;
	if (codec_drv->remove)
		codec->component.remove = snd_soc_codec_drv_remove;
3030 3031 3032 3033
	if (codec_drv->write)
		codec->component.write = snd_soc_codec_drv_write;
	if (codec_drv->read)
		codec->component.read = snd_soc_codec_drv_read;
3034
	codec->component.ignore_pmdown_time = codec_drv->ignore_pmdown_time;
3035
	codec->dapm.idle_bias_off = codec_drv->idle_bias_off;
3036
	codec->dapm.suspend_bias_off = codec_drv->suspend_bias_off;
3037 3038
	if (codec_drv->seq_notifier)
		codec->dapm.seq_notifier = codec_drv->seq_notifier;
3039 3040
	if (codec_drv->set_bias_level)
		codec->dapm.set_bias_level = snd_soc_codec_set_bias_level;
3041 3042
	codec->dev = dev;
	codec->driver = codec_drv;
3043
	codec->component.val_bytes = codec_drv->reg_word_size;
L
Liam Girdwood 已提交
3044

3045 3046 3047 3048 3049
#ifdef CONFIG_DEBUG_FS
	codec->component.init_debugfs = soc_init_codec_debugfs;
	codec->component.debugfs_prefix = "codec";
#endif

3050 3051
	if (codec_drv->get_regmap)
		codec->component.regmap = codec_drv->get_regmap(dev);
3052

3053 3054 3055 3056 3057
	for (i = 0; i < num_dai; i++) {
		fixup_codec_formats(&dai_drv[i].playback);
		fixup_codec_formats(&dai_drv[i].capture);
	}

3058
	ret = snd_soc_register_dais(&codec->component, dai_drv, num_dai, false);
3059
	if (ret < 0) {
3060 3061
		dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
		goto err_cleanup;
3062
	}
3063

3064 3065
	list_for_each_entry(dai, &codec->component.dai_list, list)
		dai->codec = codec;
3066

3067
	mutex_lock(&client_mutex);
3068
	snd_soc_component_add_unlocked(&codec->component);
3069
	list_add(&codec->list, &codec_list);
3070 3071
	mutex_unlock(&client_mutex);

3072 3073
	dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n",
		codec->component.name);
M
Mark Brown 已提交
3074
	return 0;
3075

3076 3077 3078
err_cleanup:
	snd_soc_component_cleanup(&codec->component);
err_free:
3079 3080
	kfree(codec);
	return ret;
M
Mark Brown 已提交
3081 3082 3083 3084 3085 3086
}
EXPORT_SYMBOL_GPL(snd_soc_register_codec);

/**
 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
 *
M
Mark Brown 已提交
3087
 * @codec: codec to unregister
M
Mark Brown 已提交
3088
 */
3089
void snd_soc_unregister_codec(struct device *dev)
M
Mark Brown 已提交
3090
{
3091 3092 3093 3094 3095 3096 3097 3098 3099 3100
	struct snd_soc_codec *codec;

	list_for_each_entry(codec, &codec_list, list) {
		if (dev == codec->dev)
			goto found;
	}
	return;

found:

M
Mark Brown 已提交
3101 3102
	mutex_lock(&client_mutex);
	list_del(&codec->list);
3103
	snd_soc_component_del_unlocked(&codec->component);
M
Mark Brown 已提交
3104 3105
	mutex_unlock(&client_mutex);

3106 3107
	dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n",
			codec->component.name);
3108

3109
	snd_soc_component_cleanup(&codec->component);
3110
	snd_soc_cache_exit(codec);
3111
	kfree(codec);
M
Mark Brown 已提交
3112 3113 3114
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);

3115 3116 3117 3118
/* Retrieve a card's name from device tree */
int snd_soc_of_parse_card_name(struct snd_soc_card *card,
			       const char *propname)
{
3119
	struct device_node *np;
3120 3121
	int ret;

3122 3123 3124 3125 3126 3127 3128
	if (!card->dev) {
		pr_err("card->dev is not set before calling %s\n", __func__);
		return -EINVAL;
	}

	np = card->dev->of_node;

3129 3130 3131 3132 3133 3134 3135 3136
	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,
3137
			"ASoC: Property '%s' could not be read: %d\n",
3138 3139 3140 3141 3142 3143 3144 3145
			propname, ret);
		return ret;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);

3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232
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),
};

int snd_soc_of_parse_audio_simple_widgets(struct snd_soc_card *card,
					  const char *propname)
{
	struct device_node *np = card->dev->of_node;
	struct snd_soc_dapm_widget *widgets;
	const char *template, *wname;
	int i, j, num_widgets, ret;

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

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

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

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

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

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

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

		widgets[i].name = wname;
	}

	card->dapm_widgets = widgets;
	card->num_dapm_widgets = num_widgets;

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_simple_widgets);

3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261
int snd_soc_of_parse_tdm_slot(struct device_node *np,
			      unsigned int *slots,
			      unsigned int *slot_width)
{
	u32 val;
	int ret;

	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);

3262 3263 3264 3265
int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
				   const char *propname)
{
	struct device_node *np = card->dev->of_node;
3266
	int num_routes;
3267 3268 3269 3270
	struct snd_soc_dapm_route *routes;
	int i, ret;

	num_routes = of_property_count_strings(np, propname);
3271
	if (num_routes < 0 || num_routes & 1) {
3272 3273 3274
		dev_err(card->dev,
			"ASoC: Property '%s' does not exist or its length is not even\n",
			propname);
3275 3276 3277 3278
		return -EINVAL;
	}
	num_routes /= 2;
	if (!num_routes) {
3279
		dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
3280 3281 3282 3283
			propname);
		return -EINVAL;
	}

3284
	routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
3285 3286 3287
			      GFP_KERNEL);
	if (!routes) {
		dev_err(card->dev,
3288
			"ASoC: Could not allocate DAPM route table\n");
3289 3290 3291 3292 3293
		return -EINVAL;
	}

	for (i = 0; i < num_routes; i++) {
		ret = of_property_read_string_index(np, propname,
3294
			2 * i, &routes[i].sink);
3295
		if (ret) {
3296 3297 3298
			dev_err(card->dev,
				"ASoC: Property '%s' index %d could not be read: %d\n",
				propname, 2 * i, ret);
3299 3300 3301
			return -EINVAL;
		}
		ret = of_property_read_string_index(np, propname,
3302
			(2 * i) + 1, &routes[i].source);
3303 3304
		if (ret) {
			dev_err(card->dev,
3305 3306
				"ASoC: Property '%s' index %d could not be read: %d\n",
				propname, (2 * i) + 1, ret);
3307 3308 3309 3310
			return -EINVAL;
		}
	}

3311
	card->num_dapm_routes = num_routes;
3312 3313 3314 3315 3316 3317
	card->dapm_routes = routes;

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);

3318
unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
3319 3320 3321
				     const char *prefix,
				     struct device_node **bitclkmaster,
				     struct device_node **framemaster)
3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361
{
	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;
			}
		}
	}

	/*
3362
	 * check "[prefix]continuous-clock"
3363 3364
	 * SND_SOC_DAIFMT_CLOCK_MASK area
	 */
3365 3366 3367 3368 3369
	snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
	if (of_get_property(np, prop, NULL))
		format |= SND_SOC_DAIFMT_CONT;
	else
		format |= SND_SOC_DAIFMT_GATED;
3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403

	/*
	 * 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);
3404 3405
	if (bit && bitclkmaster)
		*bitclkmaster = of_parse_phandle(np, prop, 0);
3406 3407 3408

	snprintf(prop, sizeof(prop), "%sframe-master", prefix);
	frame = !!of_get_property(np, prop, NULL);
3409 3410
	if (frame && framemaster)
		*framemaster = of_parse_phandle(np, prop, 0);
3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430

	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);

3431 3432
static int snd_soc_get_dai_name(struct of_phandle_args *args,
				const char **dai_name)
3433 3434
{
	struct snd_soc_component *pos;
3435
	int ret = -EPROBE_DEFER;
3436 3437 3438

	mutex_lock(&client_mutex);
	list_for_each_entry(pos, &component_list, list) {
3439
		if (pos->dev->of_node != args->np)
3440 3441
			continue;

3442
		if (pos->driver->of_xlate_dai_name) {
3443 3444 3445
			ret = pos->driver->of_xlate_dai_name(pos,
							     args,
							     dai_name);
3446 3447 3448
		} else {
			int id = -1;

3449
			switch (args->args_count) {
3450 3451 3452 3453
			case 0:
				id = 0; /* same as dai_drv[0] */
				break;
			case 1:
3454
				id = args->args[0];
3455 3456 3457 3458 3459 3460 3461 3462
				break;
			default:
				/* not supported */
				break;
			}

			if (id < 0 || id >= pos->num_dai) {
				ret = -EINVAL;
3463
				continue;
3464
			}
X
Xiubo Li 已提交
3465 3466 3467 3468 3469 3470

			ret = 0;

			*dai_name = pos->dai_drv[id].name;
			if (!*dai_name)
				*dai_name = pos->name;
3471 3472 3473 3474 3475
		}

		break;
	}
	mutex_unlock(&client_mutex);
3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490
	return ret;
}

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);
3491 3492 3493 3494 3495 3496 3497

	of_node_put(args.np);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);

3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568
/*
 * 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);

3569
static int __init snd_soc_init(void)
F
Frank Mandarino 已提交
3570
{
3571
#ifdef CONFIG_DEBUG_FS
3572 3573
	snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
	if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3574
		pr_warn("ASoC: Failed to create debugfs directory\n");
3575
		snd_soc_debugfs_root = NULL;
3576
	}
3577

3578
	if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3579 3580 3581
				 &codec_list_fops))
		pr_warn("ASoC: Failed to create CODEC list debugfs file\n");

3582
	if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
M
Mark Brown 已提交
3583 3584
				 &dai_list_fops))
		pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3585

3586
	if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3587 3588
				 &platform_list_fops))
		pr_warn("ASoC: Failed to create platform list debugfs file\n");
3589 3590
#endif

3591 3592
	snd_soc_util_init();

F
Frank Mandarino 已提交
3593 3594
	return platform_driver_register(&soc_driver);
}
3595
module_init(snd_soc_init);
F
Frank Mandarino 已提交
3596

M
Mark Brown 已提交
3597
static void __exit snd_soc_exit(void)
F
Frank Mandarino 已提交
3598
{
3599 3600
	snd_soc_util_exit();

3601
#ifdef CONFIG_DEBUG_FS
3602
	debugfs_remove_recursive(snd_soc_debugfs_root);
3603
#endif
3604
	platform_driver_unregister(&soc_driver);
F
Frank Mandarino 已提交
3605 3606 3607 3608
}
module_exit(snd_soc_exit);

/* Module information */
3609
MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
F
Frank Mandarino 已提交
3610 3611
MODULE_DESCRIPTION("ALSA SoC Core");
MODULE_LICENSE("GPL");
3612
MODULE_ALIAS("platform:soc-audio");