soc-core.c 96.0 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/slab.h>
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#include <sound/ac97_codec.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>
#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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static DEFINE_MUTEX(pcm_mutex);
static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);

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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);
static LIST_HEAD(card_list);
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static LIST_HEAD(dai_list);
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static LIST_HEAD(platform_list);
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static LIST_HEAD(codec_list);
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static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
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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)
{
	int wordsize = codec->driver->reg_word_size * 2;
	int regsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
	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;

	ret = snd_soc_read(codec , reg);
	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 = codec->driver->reg_word_size * 2;
	regsize = min_bytes_needed(codec->driver->reg_cache_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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		if (codec->readable_register && !codec->readable_register(codec, i))
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			continue;
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		if (codec->driver->display_register) {
			count += codec->driver->display_register(codec, buf + count,
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							 PAGE_SIZE - count, i);
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		} else {
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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;
			}
			p += len;
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		}
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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 =
			container_of(dev, struct snd_soc_pcm_runtime, 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 =
			container_of(dev, struct snd_soc_pcm_runtime, 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 =
			container_of(dev, struct snd_soc_pcm_runtime, dev);
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	int ret;
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	ret = strict_strtol(buf, 10, &rtd->pmdown_time);
	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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#ifdef CONFIG_DEBUG_FS
static int codec_reg_open_file(struct inode *inode, struct file *file)
{
	file->private_data = inode->i_private;
	return 0;
}

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];
	int buf_size;
	char *start = buf;
	unsigned long reg, value;
	int step = 1;
	struct snd_soc_codec *codec = file->private_data;

	buf_size = min(count, (sizeof(buf)-1));
	if (copy_from_user(buf, user_buf, buf_size))
		return -EFAULT;
	buf[buf_size] = 0;

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	if (codec->driver->reg_cache_step)
		step = codec->driver->reg_cache_step;
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	while (*start == ' ')
		start++;
	reg = simple_strtoul(start, &start, 16);
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	if ((reg >= codec->driver->reg_cache_size) || (reg % step))
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		return -EINVAL;
	while (*start == ' ')
		start++;
	if (strict_strtoul(start, 16, &value))
		return -EINVAL;
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	/* Userspace has been fiddling around behind the kernel's back */
	add_taint(TAINT_USER);

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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 = {
	.open = codec_reg_open_file,
	.read = codec_reg_read_file,
	.write = codec_reg_write_file,
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	.llseek = default_llseek,
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};

static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
{
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	struct dentry *debugfs_card_root = codec->card->debugfs_card_root;

	codec->debugfs_codec_root = debugfs_create_dir(codec->name,
						       debugfs_card_root);
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	if (!codec->debugfs_codec_root) {
		printk(KERN_WARNING
		       "ASoC: Failed to create codec debugfs directory\n");
		return;
	}

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	debugfs_create_bool("cache_sync", 0444, codec->debugfs_codec_root,
			    &codec->cache_sync);
	debugfs_create_bool("cache_only", 0444, codec->debugfs_codec_root,
			    &codec->cache_only);

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	codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
						 codec->debugfs_codec_root,
						 codec, &codec_reg_fops);
	if (!codec->debugfs_reg)
		printk(KERN_WARNING
		       "ASoC: Failed to create codec register debugfs file\n");

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	codec->dapm.debugfs_dapm = debugfs_create_dir("dapm",
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						 codec->debugfs_codec_root);
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	if (!codec->dapm.debugfs_dapm)
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		printk(KERN_WARNING
		       "Failed to create DAPM debugfs directory\n");

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	snd_soc_dapm_debugfs_init(&codec->dapm);
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}

static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
{
	debugfs_remove_recursive(codec->debugfs_codec_root);
}

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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",
			       codec->name);
		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_dai *dai;

	if (!buf)
		return -ENOMEM;

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	list_for_each_entry(dai, &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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	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",
			       platform->name);
		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,
			 "ASoC: Failed to create codec 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,
		       "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

static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
{
}

static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
{
}
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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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#ifdef CONFIG_SND_SOC_AC97_BUS
/* unregister ac97 codec */
static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
{
	if (codec->ac97->dev.bus)
		device_unregister(&codec->ac97->dev);
	return 0;
}

/* stop no dev release warning */
static void soc_ac97_device_release(struct device *dev){}

/* register ac97 codec to bus */
static int soc_ac97_dev_register(struct snd_soc_codec *codec)
{
	int err;

	codec->ac97->dev.bus = &ac97_bus_type;
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	codec->ac97->dev.parent = codec->card->dev;
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	codec->ac97->dev.release = soc_ac97_device_release;

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	dev_set_name(&codec->ac97->dev, "%d-%d:%s",
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		     codec->card->snd_card->number, 0, codec->name);
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	err = device_register(&codec->ac97->dev);
	if (err < 0) {
		snd_printk(KERN_ERR "Can't register ac97 bus\n");
		codec->ac97->dev.bus = NULL;
		return err;
	}
	return 0;
}
#endif

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static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
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	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
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	int ret;

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	if (codec_dai->driver->symmetric_rates || cpu_dai->driver->symmetric_rates ||
			rtd->dai_link->symmetric_rates) {
		dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n",
				rtd->rate);
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		ret = snd_pcm_hw_constraint_minmax(substream->runtime,
						   SNDRV_PCM_HW_PARAM_RATE,
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						   rtd->rate,
						   rtd->rate);
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		if (ret < 0) {
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			dev_err(&rtd->dev,
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				"Unable to apply rate symmetry constraint: %d\n", ret);
			return ret;
		}
	}

	return 0;
}

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/*
 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 * then initialized and any private data can be allocated. This also calls
 * startup for the cpu DAI, platform, machine and codec DAI.
 */
static int soc_pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_pcm_runtime *runtime = substream->runtime;
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	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
	struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
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	int ret = 0;

	mutex_lock(&pcm_mutex);

	/* startup the audio subsystem */
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	if (cpu_dai->driver->ops->startup) {
		ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
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		if (ret < 0) {
			printk(KERN_ERR "asoc: can't open interface %s\n",
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				cpu_dai->name);
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			goto out;
		}
	}

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	if (platform->driver->ops->open) {
		ret = platform->driver->ops->open(substream);
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		if (ret < 0) {
			printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
			goto platform_err;
		}
	}

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	if (codec_dai->driver->ops->startup) {
		ret = codec_dai->driver->ops->startup(substream, codec_dai);
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		if (ret < 0) {
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			printk(KERN_ERR "asoc: can't open codec %s\n",
				codec_dai->name);
			goto codec_dai_err;
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		}
	}

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	if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
		ret = rtd->dai_link->ops->startup(substream);
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		if (ret < 0) {
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			printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
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			goto machine_err;
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		}
	}

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	/* Check that the codec and cpu DAIs are compatible */
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	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		runtime->hw.rate_min =
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			max(codec_dai_drv->playback.rate_min,
			    cpu_dai_drv->playback.rate_min);
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		runtime->hw.rate_max =
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			min(codec_dai_drv->playback.rate_max,
			    cpu_dai_drv->playback.rate_max);
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		runtime->hw.channels_min =
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			max(codec_dai_drv->playback.channels_min,
				cpu_dai_drv->playback.channels_min);
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		runtime->hw.channels_max =
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			min(codec_dai_drv->playback.channels_max,
				cpu_dai_drv->playback.channels_max);
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		runtime->hw.formats =
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			codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
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		runtime->hw.rates =
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			codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
		if (codec_dai_drv->playback.rates
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			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
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			runtime->hw.rates |= cpu_dai_drv->playback.rates;
		if (cpu_dai_drv->playback.rates
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			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
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			runtime->hw.rates |= codec_dai_drv->playback.rates;
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	} else {
		runtime->hw.rate_min =
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			max(codec_dai_drv->capture.rate_min,
			    cpu_dai_drv->capture.rate_min);
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		runtime->hw.rate_max =
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			min(codec_dai_drv->capture.rate_max,
			    cpu_dai_drv->capture.rate_max);
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		runtime->hw.channels_min =
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			max(codec_dai_drv->capture.channels_min,
				cpu_dai_drv->capture.channels_min);
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		runtime->hw.channels_max =
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			min(codec_dai_drv->capture.channels_max,
				cpu_dai_drv->capture.channels_max);
612
		runtime->hw.formats =
613
			codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
614
		runtime->hw.rates =
615 616
			codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
		if (codec_dai_drv->capture.rates
617
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
618 619
			runtime->hw.rates |= cpu_dai_drv->capture.rates;
		if (cpu_dai_drv->capture.rates
620
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
621
			runtime->hw.rates |= codec_dai_drv->capture.rates;
F
Frank Mandarino 已提交
622 623 624 625 626
	}

	snd_pcm_limit_hw_rates(runtime);
	if (!runtime->hw.rates) {
		printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
627
			codec_dai->name, cpu_dai->name);
628
		goto config_err;
F
Frank Mandarino 已提交
629 630 631
	}
	if (!runtime->hw.formats) {
		printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
632
			codec_dai->name, cpu_dai->name);
633
		goto config_err;
F
Frank Mandarino 已提交
634 635 636
	}
	if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
		printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
637
				codec_dai->name, cpu_dai->name);
638
		goto config_err;
F
Frank Mandarino 已提交
639 640
	}

641 642 643 644
	/* Symmetry only applies if we've already got an active stream. */
	if (cpu_dai->active || codec_dai->active) {
		ret = soc_pcm_apply_symmetry(substream);
		if (ret != 0)
645
			goto config_err;
646 647
	}

648 649
	pr_debug("asoc: %s <-> %s info:\n",
			codec_dai->name, cpu_dai->name);
650 651 652 653 654
	pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
	pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
		 runtime->hw.channels_max);
	pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
		 runtime->hw.rate_max);
F
Frank Mandarino 已提交
655

656
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
657 658
		cpu_dai->playback_active++;
		codec_dai->playback_active++;
659
	} else {
660 661
		cpu_dai->capture_active++;
		codec_dai->capture_active++;
662 663 664
	}
	cpu_dai->active++;
	codec_dai->active++;
665
	rtd->codec->active++;
F
Frank Mandarino 已提交
666 667 668
	mutex_unlock(&pcm_mutex);
	return 0;

669
config_err:
670 671
	if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
		rtd->dai_link->ops->shutdown(substream);
F
Frank Mandarino 已提交
672

673
machine_err:
674 675
	if (codec_dai->driver->ops->shutdown)
		codec_dai->driver->ops->shutdown(substream, codec_dai);
676

677
codec_dai_err:
678 679
	if (platform->driver->ops->close)
		platform->driver->ops->close(substream);
F
Frank Mandarino 已提交
680 681

platform_err:
682 683
	if (cpu_dai->driver->ops->shutdown)
		cpu_dai->driver->ops->shutdown(substream, cpu_dai);
F
Frank Mandarino 已提交
684 685 686 687 688 689
out:
	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
690
 * Power down the audio subsystem pmdown_time msecs after close is called.
F
Frank Mandarino 已提交
691 692 693
 * This is to ensure there are no pops or clicks in between any music tracks
 * due to DAPM power cycling.
 */
694
static void close_delayed_work(struct work_struct *work)
F
Frank Mandarino 已提交
695
{
696 697 698
	struct snd_soc_pcm_runtime *rtd =
			container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
F
Frank Mandarino 已提交
699 700

	mutex_lock(&pcm_mutex);
701 702 703 704 705 706 707 708 709 710 711 712

	pr_debug("pop wq checking: %s status: %s waiting: %s\n",
		 codec_dai->driver->playback.stream_name,
		 codec_dai->playback_active ? "active" : "inactive",
		 codec_dai->pop_wait ? "yes" : "no");

	/* are we waiting on this codec DAI stream */
	if (codec_dai->pop_wait == 1) {
		codec_dai->pop_wait = 0;
		snd_soc_dapm_stream_event(rtd,
			codec_dai->driver->playback.stream_name,
			SND_SOC_DAPM_STREAM_STOP);
F
Frank Mandarino 已提交
713
	}
714

F
Frank Mandarino 已提交
715 716 717 718 719 720 721 722 723 724 725
	mutex_unlock(&pcm_mutex);
}

/*
 * Called by ALSA when a PCM substream is closed. Private data can be
 * freed here. The cpu DAI, codec DAI, machine and platform are also
 * shutdown.
 */
static int soc_codec_close(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
726 727 728 729
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_codec *codec = rtd->codec;
F
Frank Mandarino 已提交
730 731 732

	mutex_lock(&pcm_mutex);

733
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
734 735
		cpu_dai->playback_active--;
		codec_dai->playback_active--;
736
	} else {
737 738
		cpu_dai->capture_active--;
		codec_dai->capture_active--;
F
Frank Mandarino 已提交
739
	}
740 741 742

	cpu_dai->active--;
	codec_dai->active--;
F
Frank Mandarino 已提交
743 744
	codec->active--;

745 746 747 748 749 750
	/* Muting the DAC suppresses artifacts caused during digital
	 * shutdown, for example from stopping clocks.
	 */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		snd_soc_dai_digital_mute(codec_dai, 1);

751 752
	if (cpu_dai->driver->ops->shutdown)
		cpu_dai->driver->ops->shutdown(substream, cpu_dai);
F
Frank Mandarino 已提交
753

754 755
	if (codec_dai->driver->ops->shutdown)
		codec_dai->driver->ops->shutdown(substream, codec_dai);
F
Frank Mandarino 已提交
756

757 758
	if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
		rtd->dai_link->ops->shutdown(substream);
F
Frank Mandarino 已提交
759

760 761 762
	if (platform->driver->ops->close)
		platform->driver->ops->close(substream);
	cpu_dai->runtime = NULL;
F
Frank Mandarino 已提交
763 764 765

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		/* start delayed pop wq here for playback streams */
766
		codec_dai->pop_wait = 1;
767 768
		schedule_delayed_work(&rtd->delayed_work,
			msecs_to_jiffies(rtd->pmdown_time));
F
Frank Mandarino 已提交
769 770
	} else {
		/* capture streams can be powered down now */
771 772
		snd_soc_dapm_stream_event(rtd,
			codec_dai->driver->capture.stream_name,
773
			SND_SOC_DAPM_STREAM_STOP);
F
Frank Mandarino 已提交
774 775 776 777 778 779 780 781 782 783 784 785 786 787
	}

	mutex_unlock(&pcm_mutex);
	return 0;
}

/*
 * Called by ALSA when the PCM substream is prepared, can set format, sample
 * rate, etc.  This function is non atomic and can be called multiple times,
 * it can refer to the runtime info.
 */
static int soc_pcm_prepare(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
788 789 790
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
F
Frank Mandarino 已提交
791 792 793
	int ret = 0;

	mutex_lock(&pcm_mutex);
794

795 796
	if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
		ret = rtd->dai_link->ops->prepare(substream);
797 798 799 800 801 802
		if (ret < 0) {
			printk(KERN_ERR "asoc: machine prepare error\n");
			goto out;
		}
	}

803 804
	if (platform->driver->ops->prepare) {
		ret = platform->driver->ops->prepare(substream);
805 806
		if (ret < 0) {
			printk(KERN_ERR "asoc: platform prepare error\n");
F
Frank Mandarino 已提交
807
			goto out;
808
		}
F
Frank Mandarino 已提交
809 810
	}

811 812
	if (codec_dai->driver->ops->prepare) {
		ret = codec_dai->driver->ops->prepare(substream, codec_dai);
813 814
		if (ret < 0) {
			printk(KERN_ERR "asoc: codec DAI prepare error\n");
F
Frank Mandarino 已提交
815
			goto out;
816
		}
F
Frank Mandarino 已提交
817 818
	}

819 820
	if (cpu_dai->driver->ops->prepare) {
		ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
821 822 823 824 825
		if (ret < 0) {
			printk(KERN_ERR "asoc: cpu DAI prepare error\n");
			goto out;
		}
	}
F
Frank Mandarino 已提交
826

827 828 829 830
	/* cancel any delayed stream shutdown that is pending */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
	    codec_dai->pop_wait) {
		codec_dai->pop_wait = 0;
831
		cancel_delayed_work(&rtd->delayed_work);
832
	}
F
Frank Mandarino 已提交
833

834
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
835 836
		snd_soc_dapm_stream_event(rtd,
					  codec_dai->driver->playback.stream_name,
837 838
					  SND_SOC_DAPM_STREAM_START);
	else
839 840
		snd_soc_dapm_stream_event(rtd,
					  codec_dai->driver->capture.stream_name,
841
					  SND_SOC_DAPM_STREAM_START);
842

843
	snd_soc_dai_digital_mute(codec_dai, 0);
F
Frank Mandarino 已提交
844 845 846 847 848 849 850 851 852 853 854 855 856 857 858

out:
	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
 * Called by ALSA when the hardware params are set by application. This
 * function can also be called multiple times and can allocate buffers
 * (using snd_pcm_lib_* ). It's non-atomic.
 */
static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
859 860 861
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
F
Frank Mandarino 已提交
862 863 864 865
	int ret = 0;

	mutex_lock(&pcm_mutex);

866 867
	if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
		ret = rtd->dai_link->ops->hw_params(substream, params);
868 869
		if (ret < 0) {
			printk(KERN_ERR "asoc: machine hw_params failed\n");
F
Frank Mandarino 已提交
870
			goto out;
871
		}
F
Frank Mandarino 已提交
872 873
	}

874 875
	if (codec_dai->driver->ops->hw_params) {
		ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
F
Frank Mandarino 已提交
876 877
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't set codec %s hw params\n",
878 879
				codec_dai->name);
			goto codec_err;
F
Frank Mandarino 已提交
880 881 882
		}
	}

883 884
	if (cpu_dai->driver->ops->hw_params) {
		ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
F
Frank Mandarino 已提交
885
		if (ret < 0) {
886
			printk(KERN_ERR "asoc: interface %s hw params failed\n",
887
				cpu_dai->name);
F
Frank Mandarino 已提交
888 889 890 891
			goto interface_err;
		}
	}

892 893
	if (platform->driver->ops->hw_params) {
		ret = platform->driver->ops->hw_params(substream, params);
F
Frank Mandarino 已提交
894
		if (ret < 0) {
895
			printk(KERN_ERR "asoc: platform %s hw params failed\n",
F
Frank Mandarino 已提交
896 897 898 899 900
				platform->name);
			goto platform_err;
		}
	}

901
	rtd->rate = params_rate(params);
902

F
Frank Mandarino 已提交
903 904 905 906 907
out:
	mutex_unlock(&pcm_mutex);
	return ret;

platform_err:
908 909
	if (cpu_dai->driver->ops->hw_free)
		cpu_dai->driver->ops->hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
910 911

interface_err:
912 913
	if (codec_dai->driver->ops->hw_free)
		codec_dai->driver->ops->hw_free(substream, codec_dai);
914 915

codec_err:
916 917
	if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
		rtd->dai_link->ops->hw_free(substream);
F
Frank Mandarino 已提交
918 919 920 921 922 923

	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
M
Mark Brown 已提交
924
 * Frees resources allocated by hw_params, can be called multiple times
F
Frank Mandarino 已提交
925 926 927 928
 */
static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
929 930 931 932
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_codec *codec = rtd->codec;
F
Frank Mandarino 已提交
933 934 935 936

	mutex_lock(&pcm_mutex);

	/* apply codec digital mute */
937 938
	if (!codec->active)
		snd_soc_dai_digital_mute(codec_dai, 1);
F
Frank Mandarino 已提交
939 940

	/* free any machine hw params */
941 942
	if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
		rtd->dai_link->ops->hw_free(substream);
F
Frank Mandarino 已提交
943 944

	/* free any DMA resources */
945 946
	if (platform->driver->ops->hw_free)
		platform->driver->ops->hw_free(substream);
F
Frank Mandarino 已提交
947

M
Mark Brown 已提交
948
	/* now free hw params for the DAIs  */
949 950
	if (codec_dai->driver->ops->hw_free)
		codec_dai->driver->ops->hw_free(substream, codec_dai);
F
Frank Mandarino 已提交
951

952 953
	if (cpu_dai->driver->ops->hw_free)
		cpu_dai->driver->ops->hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
954 955 956 957 958 959 960 961

	mutex_unlock(&pcm_mutex);
	return 0;
}

static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
962 963 964
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
F
Frank Mandarino 已提交
965 966
	int ret;

967 968
	if (codec_dai->driver->ops->trigger) {
		ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
F
Frank Mandarino 已提交
969 970 971 972
		if (ret < 0)
			return ret;
	}

973 974
	if (platform->driver->ops->trigger) {
		ret = platform->driver->ops->trigger(substream, cmd);
F
Frank Mandarino 已提交
975 976 977 978
		if (ret < 0)
			return ret;
	}

979 980
	if (cpu_dai->driver->ops->trigger) {
		ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
F
Frank Mandarino 已提交
981 982 983 984 985 986
		if (ret < 0)
			return ret;
	}
	return 0;
}

987 988
/*
 * soc level wrapper for pointer callback
989 990
 * If cpu_dai, codec_dai, platform driver has the delay callback, than
 * the runtime->delay will be updated accordingly.
991 992 993 994
 */
static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
995 996 997
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
998
	struct snd_pcm_runtime *runtime = substream->runtime;
999
	snd_pcm_uframes_t offset = 0;
1000
	snd_pcm_sframes_t delay = 0;
1001

1002 1003
	if (platform->driver->ops->pointer)
		offset = platform->driver->ops->pointer(substream);
1004

1005 1006
	if (cpu_dai->driver->ops->delay)
		delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1007

1008 1009
	if (codec_dai->driver->ops->delay)
		delay += codec_dai->driver->ops->delay(substream, codec_dai);
1010

1011 1012
	if (platform->driver->delay)
		delay += platform->driver->delay(substream, codec_dai);
1013 1014 1015

	runtime->delay = delay;

1016 1017 1018
	return offset;
}

F
Frank Mandarino 已提交
1019 1020 1021 1022 1023 1024 1025 1026
/* ASoC PCM operations */
static struct snd_pcm_ops soc_pcm_ops = {
	.open		= soc_pcm_open,
	.close		= soc_codec_close,
	.hw_params	= soc_pcm_hw_params,
	.hw_free	= soc_pcm_hw_free,
	.prepare	= soc_pcm_prepare,
	.trigger	= soc_pcm_trigger,
1027
	.pointer	= soc_pcm_pointer,
F
Frank Mandarino 已提交
1028 1029
};

1030
#ifdef CONFIG_PM_SLEEP
F
Frank Mandarino 已提交
1031
/* powers down audio subsystem for suspend */
1032
int snd_soc_suspend(struct device *dev)
F
Frank Mandarino 已提交
1033
{
1034
	struct snd_soc_card *card = dev_get_drvdata(dev);
1035
	struct snd_soc_codec *codec;
F
Frank Mandarino 已提交
1036 1037
	int i;

1038 1039 1040
	/* If the initialization of this soc device failed, there is no codec
	 * associated with it. Just bail out in this case.
	 */
1041
	if (list_empty(&card->codec_dev_list))
1042 1043
		return 0;

1044 1045 1046
	/* Due to the resume being scheduled into a workqueue we could
	* suspend before that's finished - wait for it to complete.
	 */
1047 1048 1049
	snd_power_lock(card->snd_card);
	snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
	snd_power_unlock(card->snd_card);
1050 1051

	/* we're going to block userspace touching us until resume completes */
1052
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
1053

M
Mark Brown 已提交
1054
	/* mute any active DACs */
1055 1056 1057
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *dai = card->rtd[i].codec_dai;
		struct snd_soc_dai_driver *drv = dai->driver;
1058

1059
		if (card->rtd[i].dai_link->ignore_suspend)
1060 1061
			continue;

1062 1063
		if (drv->ops->digital_mute && dai->playback_active)
			drv->ops->digital_mute(dai, 1);
F
Frank Mandarino 已提交
1064 1065
	}

1066
	/* suspend all pcms */
1067 1068
	for (i = 0; i < card->num_rtd; i++) {
		if (card->rtd[i].dai_link->ignore_suspend)
1069 1070
			continue;

1071
		snd_pcm_suspend_all(card->rtd[i].pcm);
1072
	}
1073

1074
	if (card->suspend_pre)
1075
		card->suspend_pre(card);
F
Frank Mandarino 已提交
1076

1077 1078 1079
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
		struct snd_soc_platform *platform = card->rtd[i].platform;
1080

1081
		if (card->rtd[i].dai_link->ignore_suspend)
1082 1083
			continue;

1084 1085 1086 1087 1088 1089
		if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
			cpu_dai->driver->suspend(cpu_dai);
		if (platform->driver->suspend && !platform->suspended) {
			platform->driver->suspend(cpu_dai);
			platform->suspended = 1;
		}
F
Frank Mandarino 已提交
1090 1091 1092
	}

	/* close any waiting streams and save state */
1093
	for (i = 0; i < card->num_rtd; i++) {
1094
		flush_delayed_work_sync(&card->rtd[i].delayed_work);
L
Liam Girdwood 已提交
1095
		card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1096
	}
F
Frank Mandarino 已提交
1097

1098 1099
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1100

1101
		if (card->rtd[i].dai_link->ignore_suspend)
1102 1103
			continue;

1104 1105
		if (driver->playback.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
F
Frank Mandarino 已提交
1106
				SND_SOC_DAPM_STREAM_SUSPEND);
1107 1108 1109

		if (driver->capture.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
F
Frank Mandarino 已提交
1110 1111 1112
				SND_SOC_DAPM_STREAM_SUSPEND);
	}

1113
	/* suspend all CODECs */
1114
	list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1115 1116 1117
		/* If there are paths active then the CODEC will be held with
		 * bias _ON and should not be suspended. */
		if (!codec->suspended && codec->driver->suspend) {
L
Liam Girdwood 已提交
1118
			switch (codec->dapm.bias_level) {
1119 1120 1121 1122 1123 1124 1125 1126 1127
			case SND_SOC_BIAS_STANDBY:
			case SND_SOC_BIAS_OFF:
				codec->driver->suspend(codec, PMSG_SUSPEND);
				codec->suspended = 1;
				break;
			default:
				dev_dbg(codec->dev, "CODEC is on over suspend\n");
				break;
			}
1128 1129
		}
	}
F
Frank Mandarino 已提交
1130

1131 1132
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1133

1134
		if (card->rtd[i].dai_link->ignore_suspend)
1135 1136
			continue;

1137 1138
		if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
			cpu_dai->driver->suspend(cpu_dai);
F
Frank Mandarino 已提交
1139 1140
	}

1141
	if (card->suspend_post)
1142
		card->suspend_post(card);
F
Frank Mandarino 已提交
1143 1144 1145

	return 0;
}
1146
EXPORT_SYMBOL_GPL(snd_soc_suspend);
F
Frank Mandarino 已提交
1147

1148 1149 1150 1151
/* 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
1152
{
1153 1154
	struct snd_soc_card *card =
			container_of(work, struct snd_soc_card, deferred_resume_work);
1155
	struct snd_soc_codec *codec;
F
Frank Mandarino 已提交
1156 1157
	int i;

1158 1159 1160 1161
	/* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
	 * so userspace apps are blocked from touching us
	 */

1162
	dev_dbg(card->dev, "starting resume work\n");
1163

1164
	/* Bring us up into D2 so that DAPM starts enabling things */
1165
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1166

1167
	if (card->resume_pre)
1168
		card->resume_pre(card);
F
Frank Mandarino 已提交
1169

1170 1171 1172
	/* resume AC97 DAIs */
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1173

1174
		if (card->rtd[i].dai_link->ignore_suspend)
1175 1176
			continue;

1177 1178 1179 1180
		if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
			cpu_dai->driver->resume(cpu_dai);
	}

1181
	list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1182 1183 1184 1185 1186
		/* 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.
		 */
		if (codec->driver->resume && codec->suspended) {
L
Liam Girdwood 已提交
1187
			switch (codec->dapm.bias_level) {
1188 1189 1190 1191 1192 1193 1194 1195 1196
			case SND_SOC_BIAS_STANDBY:
			case SND_SOC_BIAS_OFF:
				codec->driver->resume(codec);
				codec->suspended = 0;
				break;
			default:
				dev_dbg(codec->dev, "CODEC was on over suspend\n");
				break;
			}
1197 1198
		}
	}
F
Frank Mandarino 已提交
1199

1200 1201
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1202

1203
		if (card->rtd[i].dai_link->ignore_suspend)
1204 1205
			continue;

1206 1207
		if (driver->playback.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
F
Frank Mandarino 已提交
1208
				SND_SOC_DAPM_STREAM_RESUME);
1209 1210 1211

		if (driver->capture.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
F
Frank Mandarino 已提交
1212 1213 1214
				SND_SOC_DAPM_STREAM_RESUME);
	}

1215
	/* unmute any active DACs */
1216 1217 1218
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *dai = card->rtd[i].codec_dai;
		struct snd_soc_dai_driver *drv = dai->driver;
1219

1220
		if (card->rtd[i].dai_link->ignore_suspend)
1221 1222
			continue;

1223 1224
		if (drv->ops->digital_mute && dai->playback_active)
			drv->ops->digital_mute(dai, 0);
F
Frank Mandarino 已提交
1225 1226
	}

1227 1228 1229
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
		struct snd_soc_platform *platform = card->rtd[i].platform;
1230

1231
		if (card->rtd[i].dai_link->ignore_suspend)
1232 1233
			continue;

1234 1235 1236 1237 1238 1239
		if (cpu_dai->driver->resume && !cpu_dai->driver->ac97_control)
			cpu_dai->driver->resume(cpu_dai);
		if (platform->driver->resume && platform->suspended) {
			platform->driver->resume(cpu_dai);
			platform->suspended = 0;
		}
F
Frank Mandarino 已提交
1240 1241
	}

1242
	if (card->resume_post)
1243
		card->resume_post(card);
F
Frank Mandarino 已提交
1244

1245
	dev_dbg(card->dev, "resume work completed\n");
1246 1247

	/* userspace can access us now we are back as we were before */
1248
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1249 1250 1251
}

/* powers up audio subsystem after a suspend */
1252
int snd_soc_resume(struct device *dev)
1253
{
1254
	struct snd_soc_card *card = dev_get_drvdata(dev);
1255
	int i;
1256

1257 1258 1259 1260 1261
	/* AC97 devices 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
	 * due to I/O costs and anti-pop so handle them out of line.
	 */
1262 1263 1264 1265 1266 1267 1268 1269 1270 1271
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
		if (cpu_dai->driver->ac97_control) {
			dev_dbg(dev, "Resuming AC97 immediately\n");
			soc_resume_deferred(&card->deferred_resume_work);
		} else {
			dev_dbg(dev, "Scheduling resume work\n");
			if (!schedule_work(&card->deferred_resume_work))
				dev_err(dev, "resume work item may be lost\n");
		}
1272
	}
1273

F
Frank Mandarino 已提交
1274 1275
	return 0;
}
1276
EXPORT_SYMBOL_GPL(snd_soc_resume);
F
Frank Mandarino 已提交
1277
#else
1278 1279
#define snd_soc_suspend NULL
#define snd_soc_resume NULL
F
Frank Mandarino 已提交
1280 1281
#endif

1282 1283 1284
static struct snd_soc_dai_ops null_dai_ops = {
};

1285
static int soc_bind_dai_link(struct snd_soc_card *card, int num)
F
Frank Mandarino 已提交
1286
{
1287 1288
	struct snd_soc_dai_link *dai_link = &card->dai_link[num];
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
M
Mark Brown 已提交
1289
	struct snd_soc_codec *codec;
1290
	struct snd_soc_platform *platform;
1291
	struct snd_soc_dai *codec_dai, *cpu_dai;
1292

1293 1294 1295
	if (rtd->complete)
		return 1;
	dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1296

1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309
	/* do we already have the CPU DAI for this link ? */
	if (rtd->cpu_dai) {
		goto find_codec;
	}
	/* no, then find CPU DAI from registered DAIs*/
	list_for_each_entry(cpu_dai, &dai_list, list) {
		if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {

			if (!try_module_get(cpu_dai->dev->driver->owner))
				return -ENODEV;

			rtd->cpu_dai = cpu_dai;
			goto find_codec;
1310 1311
		}
	}
1312 1313
	dev_dbg(card->dev, "CPU DAI %s not registered\n",
			dai_link->cpu_dai_name);
1314

1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332
find_codec:
	/* do we already have the CODEC for this link ? */
	if (rtd->codec) {
		goto find_platform;
	}

	/* no, then find CODEC from registered CODECs*/
	list_for_each_entry(codec, &codec_list, list) {
		if (!strcmp(codec->name, dai_link->codec_name)) {
			rtd->codec = codec;

			/* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
			list_for_each_entry(codec_dai, &dai_list, list) {
				if (codec->dev == codec_dai->dev &&
						!strcmp(codec_dai->name, dai_link->codec_dai_name)) {
					rtd->codec_dai = codec_dai;
					goto find_platform;
				}
1333
			}
1334 1335 1336 1337
			dev_dbg(card->dev, "CODEC DAI %s not registered\n",
					dai_link->codec_dai_name);

			goto find_platform;
1338
		}
1339 1340 1341
	}
	dev_dbg(card->dev, "CODEC %s not registered\n",
			dai_link->codec_name);
1342

1343 1344 1345 1346
find_platform:
	/* do we already have the CODEC DAI for this link ? */
	if (rtd->platform) {
		goto out;
M
Mark Brown 已提交
1347
	}
1348 1349 1350 1351 1352 1353
	/* no, then find CPU DAI from registered DAIs*/
	list_for_each_entry(platform, &platform_list, list) {
		if (!strcmp(platform->name, dai_link->platform_name)) {
			rtd->platform = platform;
			goto out;
		}
1354 1355
	}

1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368
	dev_dbg(card->dev, "platform %s not registered\n",
			dai_link->platform_name);
	return 0;

out:
	/* mark rtd as complete if we found all 4 of our client devices */
	if (rtd->codec && rtd->codec_dai && rtd->platform && rtd->cpu_dai) {
		rtd->complete = 1;
		card->num_rtd++;
	}
	return 1;
}

1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389
static void soc_remove_codec(struct snd_soc_codec *codec)
{
	int err;

	if (codec->driver->remove) {
		err = codec->driver->remove(codec);
		if (err < 0)
			dev_err(codec->dev,
				"asoc: failed to remove %s: %d\n",
				codec->name, err);
	}

	/* Make sure all DAPM widgets are freed */
	snd_soc_dapm_free(&codec->dapm);

	soc_cleanup_codec_debugfs(codec);
	codec->probed = 0;
	list_del(&codec->card_list);
	module_put(codec->dev->driver->owner);
}

1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400
static void soc_remove_dai_link(struct snd_soc_card *card, int num)
{
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
	int err;

	/* unregister the rtd device */
	if (rtd->dev_registered) {
		device_remove_file(&rtd->dev, &dev_attr_pmdown_time);
1401
		device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1402 1403 1404 1405 1406 1407 1408 1409 1410 1411
		device_unregister(&rtd->dev);
		rtd->dev_registered = 0;
	}

	/* remove the CODEC DAI */
	if (codec_dai && codec_dai->probed) {
		if (codec_dai->driver->remove) {
			err = codec_dai->driver->remove(codec_dai);
			if (err < 0)
				printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1412
		}
1413 1414 1415
		codec_dai->probed = 0;
		list_del(&codec_dai->card_list);
	}
1416

1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427
	/* remove the platform */
	if (platform && platform->probed) {
		if (platform->driver->remove) {
			err = platform->driver->remove(platform);
			if (err < 0)
				printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
		}
		platform->probed = 0;
		list_del(&platform->card_list);
		module_put(platform->dev->driver->owner);
	}
1428

1429
	/* remove the CODEC */
1430 1431
	if (codec && codec->probed)
		soc_remove_codec(codec);
F
Frank Mandarino 已提交
1432

1433 1434 1435 1436 1437 1438
	/* remove the cpu_dai */
	if (cpu_dai && cpu_dai->probed) {
		if (cpu_dai->driver->remove) {
			err = cpu_dai->driver->remove(cpu_dai);
			if (err < 0)
				printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
F
Frank Mandarino 已提交
1439
		}
1440 1441 1442
		cpu_dai->probed = 0;
		list_del(&cpu_dai->card_list);
		module_put(cpu_dai->dev->driver->owner);
F
Frank Mandarino 已提交
1443
	}
1444
}
F
Frank Mandarino 已提交
1445

1446 1447 1448 1449 1450
static void soc_set_name_prefix(struct snd_soc_card *card,
				struct snd_soc_codec *codec)
{
	int i;

1451
	if (card->codec_conf == NULL)
1452 1453
		return;

1454 1455
	for (i = 0; i < card->num_configs; i++) {
		struct snd_soc_codec_conf *map = &card->codec_conf[i];
1456 1457 1458 1459 1460 1461 1462
		if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
			codec->name_prefix = map->name_prefix;
			break;
		}
	}
}

1463 1464 1465 1466 1467 1468 1469 1470 1471
static int soc_probe_codec(struct snd_soc_card *card,
			   struct snd_soc_codec *codec)
{
	int ret = 0;

	codec->card = card;
	codec->dapm.card = card;
	soc_set_name_prefix(card, codec);

1472 1473 1474
	if (!try_module_get(codec->dev->driver->owner))
		return -ENODEV;

1475 1476 1477 1478 1479 1480
	if (codec->driver->probe) {
		ret = codec->driver->probe(codec);
		if (ret < 0) {
			dev_err(codec->dev,
				"asoc: failed to probe CODEC %s: %d\n",
				codec->name, ret);
1481
			goto err_probe;
1482 1483 1484 1485 1486 1487 1488 1489
		}
	}

	soc_init_codec_debugfs(codec);

	/* mark codec as probed and add to card codec list */
	codec->probed = 1;
	list_add(&codec->card_list, &card->codec_dev_list);
1490
	list_add(&codec->dapm.list, &card->dapm_list);
1491

1492 1493 1494 1495 1496
	return 0;

err_probe:
	module_put(codec->dev->driver->owner);

1497 1498 1499
	return ret;
}

1500 1501
static void rtd_release(struct device *dev) {}

1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520
static int soc_post_component_init(struct snd_soc_card *card,
				   struct snd_soc_codec *codec,
				   int num, int dailess)
{
	struct snd_soc_dai_link *dai_link = NULL;
	struct snd_soc_aux_dev *aux_dev = NULL;
	struct snd_soc_pcm_runtime *rtd;
	const char *temp, *name;
	int ret = 0;

	if (!dailess) {
		dai_link = &card->dai_link[num];
		rtd = &card->rtd[num];
		name = dai_link->name;
	} else {
		aux_dev = &card->aux_dev[num];
		rtd = &card->rtd_aux[num];
		name = aux_dev->name;
	}
1521
	rtd->card = card;
1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569

	/* machine controls, routes and widgets are not prefixed */
	temp = codec->name_prefix;
	codec->name_prefix = NULL;

	/* do machine specific initialization */
	if (!dailess && dai_link->init)
		ret = dai_link->init(rtd);
	else if (dailess && aux_dev->init)
		ret = aux_dev->init(&codec->dapm);
	if (ret < 0) {
		dev_err(card->dev, "asoc: failed to init %s: %d\n", name, ret);
		return ret;
	}
	codec->name_prefix = temp;

	/* Make sure all DAPM widgets are instantiated */
	snd_soc_dapm_new_widgets(&codec->dapm);

	/* register the rtd device */
	rtd->codec = codec;
	rtd->dev.parent = card->dev;
	rtd->dev.release = rtd_release;
	rtd->dev.init_name = name;
	ret = device_register(&rtd->dev);
	if (ret < 0) {
		dev_err(card->dev,
			"asoc: failed to register runtime device: %d\n", ret);
		return ret;
	}
	rtd->dev_registered = 1;

	/* add DAPM sysfs entries for this codec */
	ret = snd_soc_dapm_sys_add(&rtd->dev);
	if (ret < 0)
		dev_err(codec->dev,
			"asoc: failed to add codec dapm sysfs entries: %d\n",
			ret);

	/* add codec sysfs entries */
	ret = device_create_file(&rtd->dev, &dev_attr_codec_reg);
	if (ret < 0)
		dev_err(codec->dev,
			"asoc: failed to add codec sysfs files: %d\n", ret);

	return 0;
}

1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602
static int soc_probe_dai_link(struct snd_soc_card *card, int num)
{
	struct snd_soc_dai_link *dai_link = &card->dai_link[num];
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
	int ret;

	dev_dbg(card->dev, "probe %s dai link %d\n", card->name, num);

	/* config components */
	codec_dai->codec = codec;
	cpu_dai->platform = platform;
	codec_dai->card = card;
	cpu_dai->card = card;

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

	/* probe the cpu_dai */
	if (!cpu_dai->probed) {
		if (cpu_dai->driver->probe) {
			ret = cpu_dai->driver->probe(cpu_dai);
			if (ret < 0) {
				printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
						cpu_dai->name);
				return ret;
			}
		}
		cpu_dai->probed = 1;
		/* mark cpu_dai as probed and add to card cpu_dai list */
		list_add(&cpu_dai->card_list, &card->dai_dev_list);
F
Frank Mandarino 已提交
1603 1604
	}

1605 1606
	/* probe the CODEC */
	if (!codec->probed) {
1607 1608 1609
		ret = soc_probe_codec(card, codec);
		if (ret < 0)
			return ret;
F
Frank Mandarino 已提交
1610 1611
	}

1612 1613
	/* probe the platform */
	if (!platform->probed) {
1614 1615 1616
		if (!try_module_get(platform->dev->driver->owner))
			return -ENODEV;

1617 1618 1619 1620 1621
		if (platform->driver->probe) {
			ret = platform->driver->probe(platform);
			if (ret < 0) {
				printk(KERN_ERR "asoc: failed to probe platform %s\n",
						platform->name);
1622
				module_put(platform->dev->driver->owner);
1623 1624 1625 1626 1627 1628 1629
				return ret;
			}
		}
		/* mark platform as probed and add to card platform list */
		platform->probed = 1;
		list_add(&platform->card_list, &card->platform_dev_list);
	}
1630

1631 1632 1633 1634
	/* probe the CODEC DAI */
	if (!codec_dai->probed) {
		if (codec_dai->driver->probe) {
			ret = codec_dai->driver->probe(codec_dai);
M
Mark Brown 已提交
1635
			if (ret < 0) {
1636 1637 1638
				printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
						codec_dai->name);
				return ret;
M
Mark Brown 已提交
1639 1640
			}
		}
1641 1642 1643 1644

		/* mark cpu_dai as probed and add to card cpu_dai list */
		codec_dai->probed = 1;
		list_add(&codec_dai->card_list, &card->dai_dev_list);
M
Mark Brown 已提交
1645 1646
	}

1647 1648 1649
	/* DAPM dai link stream work */
	INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);

1650 1651
	ret = soc_post_component_init(card, codec, num, 0);
	if (ret)
1652
		return ret;
M
Mark Brown 已提交
1653

1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671
	ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
	if (ret < 0)
		printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");

	/* create the pcm */
	ret = soc_new_pcm(rtd, num);
	if (ret < 0) {
		printk(KERN_ERR "asoc: can't create pcm %s\n", dai_link->stream_name);
		return ret;
	}

	/* add platform data for AC97 devices */
	if (rtd->codec_dai->driver->ac97_control)
		snd_ac97_dev_add_pdata(codec->ac97, rtd->cpu_dai->ac97_pdata);

	return 0;
}

M
Mark Brown 已提交
1672
#ifdef CONFIG_SND_SOC_AC97_BUS
1673 1674 1675 1676
static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
{
	int ret;

M
Mark Brown 已提交
1677 1678 1679
	/* Only instantiate AC97 if not already done by the adaptor
	 * for the generic AC97 subsystem.
	 */
1680
	if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1681 1682 1683 1684 1685 1686 1687 1688 1689 1690
		/*
		 * It is possible that the AC97 device is already registered to
		 * the device subsystem. This happens when the device is created
		 * via snd_ac97_mixer(). Currently only SoC codec that does so
		 * is the generic AC97 glue but others migh emerge.
		 *
		 * In those cases we don't try to register the device again.
		 */
		if (!rtd->codec->ac97_created)
			return 0;
1691 1692

		ret = soc_ac97_dev_register(rtd->codec);
M
Mark Brown 已提交
1693 1694
		if (ret < 0) {
			printk(KERN_ERR "asoc: AC97 device register failed\n");
1695
			return ret;
M
Mark Brown 已提交
1696
		}
1697 1698

		rtd->codec->ac97_registered = 1;
M
Mark Brown 已提交
1699
	}
1700 1701 1702 1703 1704 1705 1706 1707 1708 1709
	return 0;
}

static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
{
	if (codec->ac97_registered) {
		soc_ac97_dev_unregister(codec);
		codec->ac97_registered = 0;
	}
}
M
Mark Brown 已提交
1710 1711
#endif

1712 1713 1714 1715
static int soc_probe_aux_dev(struct snd_soc_card *card, int num)
{
	struct snd_soc_aux_dev *aux_dev = &card->aux_dev[num];
	struct snd_soc_codec *codec;
1716
	int ret = -ENODEV;
1717 1718 1719 1720 1721 1722 1723 1724 1725 1726

	/* find CODEC from registered CODECs*/
	list_for_each_entry(codec, &codec_list, list) {
		if (!strcmp(codec->name, aux_dev->codec_name)) {
			if (codec->probed) {
				dev_err(codec->dev,
					"asoc: codec already probed");
				ret = -EBUSY;
				goto out;
			}
1727
			goto found;
1728 1729
		}
	}
1730 1731 1732
	/* codec not found */
	dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
	goto out;
1733

1734
found:
1735
	ret = soc_probe_codec(card, codec);
1736
	if (ret < 0)
1737
		return ret;
1738

1739
	ret = soc_post_component_init(card, codec, num, 1);
1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751

out:
	return ret;
}

static void soc_remove_aux_dev(struct snd_soc_card *card, int num)
{
	struct snd_soc_pcm_runtime *rtd = &card->rtd_aux[num];
	struct snd_soc_codec *codec = rtd->codec;

	/* unregister the rtd device */
	if (rtd->dev_registered) {
1752
		device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1753 1754 1755 1756
		device_unregister(&rtd->dev);
		rtd->dev_registered = 0;
	}

1757 1758
	if (codec && codec->probed)
		soc_remove_codec(codec);
1759 1760
}

1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781
static int snd_soc_init_codec_cache(struct snd_soc_codec *codec,
				    enum snd_soc_compress_type compress_type)
{
	int ret;

	if (codec->cache_init)
		return 0;

	/* override the compress_type if necessary */
	if (compress_type && codec->compress_type != compress_type)
		codec->compress_type = compress_type;
	ret = snd_soc_cache_init(codec);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to set cache compression type: %d\n",
			ret);
		return ret;
	}
	codec->cache_init = 1;
	return 0;
}

1782 1783
static void snd_soc_instantiate_card(struct snd_soc_card *card)
{
1784 1785 1786
	struct snd_soc_codec *codec;
	struct snd_soc_codec_conf *codec_conf;
	enum snd_soc_compress_type compress_type;
1787
	int ret, i;
M
Mark Brown 已提交
1788

1789
	mutex_lock(&card->mutex);
1790

1791 1792 1793 1794
	if (card->instantiated) {
		mutex_unlock(&card->mutex);
		return;
	}
M
Mark Brown 已提交
1795

1796 1797 1798
	/* bind DAIs */
	for (i = 0; i < card->num_links; i++)
		soc_bind_dai_link(card, i);
M
Mark Brown 已提交
1799

1800 1801 1802 1803 1804
	/* bind completed ? */
	if (card->num_rtd != card->num_links) {
		mutex_unlock(&card->mutex);
		return;
	}
1805

1806 1807 1808 1809
	/* initialize the register cache for each available codec */
	list_for_each_entry(codec, &codec_list, list) {
		if (codec->cache_init)
			continue;
1810 1811
		/* by default we don't override the compress_type */
		compress_type = 0;
1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828
		/* check to see if we need to override the compress_type */
		for (i = 0; i < card->num_configs; ++i) {
			codec_conf = &card->codec_conf[i];
			if (!strcmp(codec->name, codec_conf->dev_name)) {
				compress_type = codec_conf->compress_type;
				if (compress_type && compress_type
				    != codec->compress_type)
					break;
			}
		}
		ret = snd_soc_init_codec_cache(codec, compress_type);
		if (ret < 0) {
			mutex_unlock(&card->mutex);
			return;
		}
	}

1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839
	/* card bind complete so register a sound card */
	ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
			card->owner, 0, &card->snd_card);
	if (ret < 0) {
		printk(KERN_ERR "asoc: can't create sound card for card %s\n",
			card->name);
		mutex_unlock(&card->mutex);
		return;
	}
	card->snd_card->dev = card->dev;

M
Mark Brown 已提交
1840 1841 1842 1843 1844
	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);

1845
#ifdef CONFIG_PM_SLEEP
1846 1847 1848
	/* deferred resume work */
	INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
#endif
F
Frank Mandarino 已提交
1849

1850 1851
	/* initialise the sound card only once */
	if (card->probe) {
1852
		ret = card->probe(card);
1853 1854 1855
		if (ret < 0)
			goto card_probe_error;
	}
M
Mark Brown 已提交
1856

1857 1858 1859
	for (i = 0; i < card->num_links; i++) {
		ret = soc_probe_dai_link(card, i);
		if (ret < 0) {
1860 1861
			pr_err("asoc: failed to instantiate card %s: %d\n",
			       card->name, ret);
1862 1863 1864
			goto probe_dai_err;
		}
	}
F
Frank Mandarino 已提交
1865

1866 1867 1868 1869 1870 1871 1872 1873 1874
	for (i = 0; i < card->num_aux_devs; i++) {
		ret = soc_probe_aux_dev(card, i);
		if (ret < 0) {
			pr_err("asoc: failed to add auxiliary devices %s: %d\n",
			       card->name, ret);
			goto probe_aux_dev_err;
		}
	}

1875 1876 1877 1878 1879 1880 1881
	if (card->dapm_widgets)
		snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
					  card->num_dapm_widgets);
	if (card->dapm_routes)
		snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
					card->num_dapm_routes);

1882
#ifdef CONFIG_DEBUG_FS
M
Mark Brown 已提交
1883 1884 1885 1886 1887 1888 1889
	card->dapm.debugfs_dapm = debugfs_create_dir("dapm",
						     card->debugfs_card_root);
	if (!card->dapm.debugfs_dapm)
		printk(KERN_WARNING
		       "Failed to create card DAPM debugfs directory\n");

	snd_soc_dapm_debugfs_init(&card->dapm);
1890
#endif
M
Mark Brown 已提交
1891

1892 1893 1894 1895 1896
	snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
		 "%s",  card->name);
	snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
		 "%s", card->name);

1897 1898 1899 1900 1901 1902 1903 1904 1905
	if (card->late_probe) {
		ret = card->late_probe(card);
		if (ret < 0) {
			dev_err(card->dev, "%s late_probe() failed: %d\n",
				card->name, ret);
			goto probe_aux_dev_err;
		}
	}

1906 1907 1908
	ret = snd_card_register(card->snd_card);
	if (ret < 0) {
		printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1909
		goto probe_aux_dev_err;
F
Frank Mandarino 已提交
1910 1911
	}

1912 1913 1914
#ifdef CONFIG_SND_SOC_AC97_BUS
	/* register any AC97 codecs */
	for (i = 0; i < card->num_rtd; i++) {
1915 1916 1917 1918
		ret = soc_register_ac97_dai_link(&card->rtd[i]);
		if (ret < 0) {
			printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
			while (--i >= 0)
M
Mark Brown 已提交
1919
				soc_unregister_ac97_dai_link(card->rtd[i].codec);
1920
			goto probe_aux_dev_err;
1921
		}
1922
	}
1923 1924 1925 1926 1927 1928
#endif

	card->instantiated = 1;
	mutex_unlock(&card->mutex);
	return;

1929 1930 1931 1932
probe_aux_dev_err:
	for (i = 0; i < card->num_aux_devs; i++)
		soc_remove_aux_dev(card, i);

1933 1934 1935 1936 1937
probe_dai_err:
	for (i = 0; i < card->num_links; i++)
		soc_remove_dai_link(card, i);

card_probe_error:
1938
	if (card->remove)
1939
		card->remove(card);
1940 1941 1942 1943

	snd_card_free(card->snd_card);

	mutex_unlock(&card->mutex);
1944
}
F
Frank Mandarino 已提交
1945

1946
/*
1947
 * Attempt to initialise any uninitialised cards.  Must be called with
1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959
 * client_mutex.
 */
static void snd_soc_instantiate_cards(void)
{
	struct snd_soc_card *card;
	list_for_each_entry(card, &card_list, list)
		snd_soc_instantiate_card(card);
}

/* probes a new socdev */
static int soc_probe(struct platform_device *pdev)
{
1960
	struct snd_soc_card *card = platform_get_drvdata(pdev);
1961 1962
	int ret = 0;

1963 1964 1965 1966 1967 1968 1969
	/*
	 * no card, so machine driver should be registering card
	 * we should not be here in that case so ret error
	 */
	if (!card)
		return -EINVAL;

1970 1971
	/* Bodge while we unpick instantiation */
	card->dev = &pdev->dev;
1972

1973 1974 1975 1976 1977 1978 1979
	ret = snd_soc_register_card(card);
	if (ret != 0) {
		dev_err(&pdev->dev, "Failed to register card\n");
		return ret;
	}

	return 0;
F
Frank Mandarino 已提交
1980 1981
}

1982
static int soc_cleanup_card_resources(struct snd_soc_card *card)
F
Frank Mandarino 已提交
1983 1984 1985
{
	int i;

1986 1987 1988 1989 1990
	/* make sure any delayed work runs */
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
		flush_delayed_work_sync(&rtd->delayed_work);
	}
1991

1992 1993 1994
	/* remove auxiliary devices */
	for (i = 0; i < card->num_aux_devs; i++)
		soc_remove_aux_dev(card, i);
F
Frank Mandarino 已提交
1995

1996 1997 1998
	/* remove and free each DAI */
	for (i = 0; i < card->num_rtd; i++)
		soc_remove_dai_link(card, i);
1999

2000
	soc_cleanup_card_debugfs(card);
2001

2002 2003
	/* remove the card */
	if (card->remove)
2004
		card->remove(card);
2005

2006 2007 2008 2009 2010 2011 2012 2013 2014 2015
	kfree(card->rtd);
	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
2016

M
Mark Brown 已提交
2017
	snd_soc_unregister_card(card);
F
Frank Mandarino 已提交
2018 2019 2020
	return 0;
}

2021
int snd_soc_poweroff(struct device *dev)
M
Mark Brown 已提交
2022
{
2023
	struct snd_soc_card *card = dev_get_drvdata(dev);
2024
	int i;
M
Mark Brown 已提交
2025 2026

	if (!card->instantiated)
M
Mark Brown 已提交
2027
		return 0;
M
Mark Brown 已提交
2028 2029 2030

	/* Flush out pmdown_time work - we actually do want to run it
	 * now, we're shutting down so no imminent restart. */
2031 2032
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2033
		flush_delayed_work_sync(&rtd->delayed_work);
2034
	}
M
Mark Brown 已提交
2035

2036
	snd_soc_dapm_shutdown(card);
M
Mark Brown 已提交
2037 2038

	return 0;
M
Mark Brown 已提交
2039
}
2040
EXPORT_SYMBOL_GPL(snd_soc_poweroff);
M
Mark Brown 已提交
2041

2042 2043 2044 2045
const struct dev_pm_ops snd_soc_pm_ops = {
	.suspend = snd_soc_suspend,
	.resume = snd_soc_resume,
	.poweroff = snd_soc_poweroff,
M
Mark Brown 已提交
2046 2047
};

F
Frank Mandarino 已提交
2048 2049 2050 2051
/* ASoC platform driver */
static struct platform_driver soc_driver = {
	.driver		= {
		.name		= "soc-audio",
2052
		.owner		= THIS_MODULE,
2053
		.pm		= &snd_soc_pm_ops,
F
Frank Mandarino 已提交
2054 2055 2056 2057 2058 2059
	},
	.probe		= soc_probe,
	.remove		= soc_remove,
};

/* create a new pcm */
2060 2061 2062 2063 2064 2065
static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
{
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
F
Frank Mandarino 已提交
2066 2067 2068 2069 2070
	struct snd_pcm *pcm;
	char new_name[64];
	int ret = 0, playback = 0, capture = 0;

	/* check client and interface hw capabilities */
2071
	snprintf(new_name, sizeof(new_name), "%s %s-%d",
2072
			rtd->dai_link->stream_name, codec_dai->name, num);
F
Frank Mandarino 已提交
2073

2074
	if (codec_dai->driver->playback.channels_min)
F
Frank Mandarino 已提交
2075
		playback = 1;
2076
	if (codec_dai->driver->capture.channels_min)
F
Frank Mandarino 已提交
2077 2078
		capture = 1;

2079 2080 2081
	dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
	ret = snd_pcm_new(rtd->card->snd_card, new_name,
			num, playback, capture, &pcm);
F
Frank Mandarino 已提交
2082
	if (ret < 0) {
2083
		printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
F
Frank Mandarino 已提交
2084 2085 2086
		return ret;
	}

2087
	rtd->pcm = pcm;
F
Frank Mandarino 已提交
2088
	pcm->private_data = rtd;
2089 2090 2091 2092 2093 2094 2095
	soc_pcm_ops.mmap = platform->driver->ops->mmap;
	soc_pcm_ops.pointer = platform->driver->ops->pointer;
	soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
	soc_pcm_ops.copy = platform->driver->ops->copy;
	soc_pcm_ops.silence = platform->driver->ops->silence;
	soc_pcm_ops.ack = platform->driver->ops->ack;
	soc_pcm_ops.page = platform->driver->ops->page;
F
Frank Mandarino 已提交
2096 2097 2098 2099 2100 2101 2102

	if (playback)
		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);

	if (capture)
		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);

2103
	ret = platform->driver->pcm_new(rtd->card->snd_card, codec_dai, pcm);
F
Frank Mandarino 已提交
2104 2105 2106 2107 2108
	if (ret < 0) {
		printk(KERN_ERR "asoc: platform pcm constructor failed\n");
		return ret;
	}

2109
	pcm->private_free = platform->driver->pcm_free;
F
Frank Mandarino 已提交
2110 2111 2112 2113 2114
	printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
		cpu_dai->name);
	return ret;
}

2115 2116 2117 2118 2119 2120 2121 2122
/**
 * snd_soc_codec_volatile_register: Report if a register is volatile.
 *
 * @codec: CODEC to query.
 * @reg: Register to query.
 *
 * Boolean function indiciating if a CODEC register is volatile.
 */
2123 2124
int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
				    unsigned int reg)
2125
{
2126 2127
	if (codec->volatile_register)
		return codec->volatile_register(codec, reg);
2128 2129 2130 2131 2132
	else
		return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);

F
Frank Mandarino 已提交
2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161
/**
 * snd_soc_new_ac97_codec - initailise AC97 device
 * @codec: audio codec
 * @ops: AC97 bus operations
 * @num: AC97 codec number
 *
 * Initialises AC97 codec resources for use by ad-hoc devices only.
 */
int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
	struct snd_ac97_bus_ops *ops, int num)
{
	mutex_lock(&codec->mutex);

	codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
	if (codec->ac97 == NULL) {
		mutex_unlock(&codec->mutex);
		return -ENOMEM;
	}

	codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
	if (codec->ac97->bus == NULL) {
		kfree(codec->ac97);
		codec->ac97 = NULL;
		mutex_unlock(&codec->mutex);
		return -ENOMEM;
	}

	codec->ac97->bus->ops = ops;
	codec->ac97->num = num;
2162 2163 2164 2165 2166 2167 2168

	/*
	 * Mark the AC97 device to be created by us. This way we ensure that the
	 * device will be registered with the device subsystem later on.
	 */
	codec->ac97_created = 1;

F
Frank Mandarino 已提交
2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182
	mutex_unlock(&codec->mutex);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);

/**
 * snd_soc_free_ac97_codec - free AC97 codec device
 * @codec: audio codec
 *
 * Frees AC97 codec device resources.
 */
void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
{
	mutex_lock(&codec->mutex);
2183 2184 2185
#ifdef CONFIG_SND_SOC_AC97_BUS
	soc_unregister_ac97_dai_link(codec);
#endif
F
Frank Mandarino 已提交
2186 2187 2188
	kfree(codec->ac97->bus);
	kfree(codec->ac97);
	codec->ac97 = NULL;
2189
	codec->ac97_created = 0;
F
Frank Mandarino 已提交
2190 2191 2192 2193
	mutex_unlock(&codec->mutex);
}
EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);

2194 2195 2196 2197
unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
{
	unsigned int ret;

2198
	ret = codec->read(codec, reg);
2199
	dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2200
	trace_snd_soc_reg_read(codec, reg, ret);
2201 2202 2203 2204 2205 2206 2207 2208 2209

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_read);

unsigned int snd_soc_write(struct snd_soc_codec *codec,
			   unsigned int reg, unsigned int val)
{
	dev_dbg(codec->dev, "write %x = %x\n", reg, val);
2210
	trace_snd_soc_reg_write(codec, reg, val);
2211
	return codec->write(codec, reg, val);
2212 2213 2214
}
EXPORT_SYMBOL_GPL(snd_soc_write);

F
Frank Mandarino 已提交
2215 2216 2217 2218 2219 2220 2221 2222 2223
/**
 * snd_soc_update_bits - update codec register bits
 * @codec: audio codec
 * @reg: codec register
 * @mask: register mask
 * @value: new value
 *
 * Writes new register value.
 *
2224
 * Returns 1 for change, 0 for no change, or negative error code.
F
Frank Mandarino 已提交
2225 2226
 */
int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2227
				unsigned int mask, unsigned int value)
F
Frank Mandarino 已提交
2228 2229
{
	int change;
2230
	unsigned int old, new;
2231 2232 2233 2234 2235
	int ret;

	ret = snd_soc_read(codec, reg);
	if (ret < 0)
		return ret;
F
Frank Mandarino 已提交
2236

2237
	old = ret;
F
Frank Mandarino 已提交
2238 2239
	new = (old & ~mask) | value;
	change = old != new;
2240 2241 2242 2243 2244
	if (change) {
		ret = snd_soc_write(codec, reg, new);
		if (ret < 0)
			return ret;
	}
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	return change;
}
EXPORT_SYMBOL_GPL(snd_soc_update_bits);

2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260
/**
 * snd_soc_update_bits_locked - update codec register bits
 * @codec: audio codec
 * @reg: codec register
 * @mask: register mask
 * @value: new value
 *
 * Writes new register value, and takes the codec mutex.
 *
 * Returns 1 for change else 0.
 */
2261 2262 2263
int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
			       unsigned short reg, unsigned int mask,
			       unsigned int value)
2264 2265 2266 2267 2268 2269 2270 2271 2272
{
	int change;

	mutex_lock(&codec->mutex);
	change = snd_soc_update_bits(codec, reg, mask, value);
	mutex_unlock(&codec->mutex);

	return change;
}
2273
EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2274

F
Frank Mandarino 已提交
2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287
/**
 * snd_soc_test_bits - test register for change
 * @codec: audio codec
 * @reg: codec register
 * @mask: register mask
 * @value: new value
 *
 * Tests a register with a new value and checks if the new value is
 * different from the old value.
 *
 * Returns 1 for change else 0.
 */
int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
2288
				unsigned int mask, unsigned int value)
F
Frank Mandarino 已提交
2289 2290
{
	int change;
2291
	unsigned int old, new;
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	old = snd_soc_read(codec, reg);
	new = (old & ~mask) | value;
	change = old != new;

	return change;
}
EXPORT_SYMBOL_GPL(snd_soc_test_bits);

/**
 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
 * @substream: the pcm substream
 * @hw: the hardware parameters
 *
 * Sets the substream runtime hardware parameters.
 */
int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
	const struct snd_pcm_hardware *hw)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	runtime->hw.info = hw->info;
	runtime->hw.formats = hw->formats;
	runtime->hw.period_bytes_min = hw->period_bytes_min;
	runtime->hw.period_bytes_max = hw->period_bytes_max;
	runtime->hw.periods_min = hw->periods_min;
	runtime->hw.periods_max = hw->periods_max;
	runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
	runtime->hw.fifo_size = hw->fifo_size;
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);

/**
 * snd_soc_cnew - create new control
 * @_template: control template
 * @data: control private data
M
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 * @long_name: control long name
F
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2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347
 *
 * 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,
	void *data, char *long_name)
{
	struct snd_kcontrol_new template;

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

	return snd_ctl_new1(&template, data);
}
EXPORT_SYMBOL_GPL(snd_soc_cnew);

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Ian Molton 已提交
2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361
/**
 * snd_soc_add_controls - add an array of controls to a codec.
 * Convienience function to add a list of controls. Many codecs were
 * 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.
 */
int snd_soc_add_controls(struct snd_soc_codec *codec,
	const struct snd_kcontrol_new *controls, int num_controls)
{
2362
	struct snd_card *card = codec->card->snd_card;
2363
	char prefixed_name[44], *name;
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2364 2365 2366 2367
	int err, i;

	for (i = 0; i < num_controls; i++) {
		const struct snd_kcontrol_new *control = &controls[i];
2368 2369 2370 2371 2372 2373 2374 2375
		if (codec->name_prefix) {
			snprintf(prefixed_name, sizeof(prefixed_name), "%s %s",
				 codec->name_prefix, control->name);
			name = prefixed_name;
		} else {
			name = control->name;
		}
		err = snd_ctl_add(card, snd_soc_cnew(control, codec, name));
I
Ian Molton 已提交
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		if (err < 0) {
2377
			dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2378
				codec->name, name, err);
I
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			return err;
		}
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_add_controls);

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/**
 * snd_soc_info_enum_double - enumerated double mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a double enumerated
 * mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
2404
	uinfo->value.enumerated.items = e->max;
F
Frank Mandarino 已提交
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2406 2407
	if (uinfo->value.enumerated.item > e->max - 1)
		uinfo->value.enumerated.item = e->max - 1;
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	strcpy(uinfo->value.enumerated.name,
		e->texts[uinfo->value.enumerated.item]);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);

/**
 * snd_soc_get_enum_double - enumerated double mixer get callback
 * @kcontrol: mixer control
M
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2417
 * @ucontrol: control element information
F
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2418 2419 2420 2421 2422 2423 2424 2425 2426 2427
 *
 * Callback to get the value of a double enumerated mixer.
 *
 * Returns 0 for success.
 */
int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2428
	unsigned int val, bitmask;
F
Frank Mandarino 已提交
2429

2430
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
Frank Mandarino 已提交
2431 2432
		;
	val = snd_soc_read(codec, e->reg);
2433 2434
	ucontrol->value.enumerated.item[0]
		= (val >> e->shift_l) & (bitmask - 1);
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	if (e->shift_l != e->shift_r)
		ucontrol->value.enumerated.item[1] =
			(val >> e->shift_r) & (bitmask - 1);

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);

/**
 * snd_soc_put_enum_double - enumerated double mixer put callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2446
 * @ucontrol: control element information
F
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2447 2448 2449 2450 2451 2452 2453 2454 2455 2456
 *
 * Callback to set the value of a double enumerated mixer.
 *
 * Returns 0 for success.
 */
int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2457 2458
	unsigned int val;
	unsigned int mask, bitmask;
F
Frank Mandarino 已提交
2459

2460
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
Frank Mandarino 已提交
2461
		;
2462
	if (ucontrol->value.enumerated.item[0] > e->max - 1)
F
Frank Mandarino 已提交
2463 2464 2465 2466
		return -EINVAL;
	val = ucontrol->value.enumerated.item[0] << e->shift_l;
	mask = (bitmask - 1) << e->shift_l;
	if (e->shift_l != e->shift_r) {
2467
		if (ucontrol->value.enumerated.item[1] > e->max - 1)
F
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			return -EINVAL;
		val |= ucontrol->value.enumerated.item[1] << e->shift_r;
		mask |= (bitmask - 1) << e->shift_r;
	}

2473
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
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}
EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);

P
Peter Ujfalusi 已提交
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/**
 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
 * @kcontrol: mixer control
 * @ucontrol: control element information
 *
 * Callback to get the value of a double semi enumerated mixer.
 *
 * Semi enumerated mixer: the enumerated items are referred as values. Can be
 * used for handling bitfield coded enumeration for example.
 *
 * Returns 0 for success.
 */
int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2493
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2494
	unsigned int reg_val, val, mux;
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	reg_val = snd_soc_read(codec, e->reg);
	val = (reg_val >> e->shift_l) & e->mask;
	for (mux = 0; mux < e->max; mux++) {
		if (val == e->values[mux])
			break;
	}
	ucontrol->value.enumerated.item[0] = mux;
	if (e->shift_l != e->shift_r) {
		val = (reg_val >> e->shift_r) & e->mask;
		for (mux = 0; mux < e->max; mux++) {
			if (val == e->values[mux])
				break;
		}
		ucontrol->value.enumerated.item[1] = mux;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);

/**
 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
 * @kcontrol: mixer control
 * @ucontrol: control element information
 *
 * Callback to set the value of a double semi enumerated mixer.
 *
 * Semi enumerated mixer: the enumerated items are referred as values. Can be
 * used for handling bitfield coded enumeration for example.
 *
 * Returns 0 for success.
 */
int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2532
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2533 2534
	unsigned int val;
	unsigned int mask;
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Peter Ujfalusi 已提交
2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546

	if (ucontrol->value.enumerated.item[0] > e->max - 1)
		return -EINVAL;
	val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
	mask = e->mask << e->shift_l;
	if (e->shift_l != e->shift_r) {
		if (ucontrol->value.enumerated.item[1] > e->max - 1)
			return -EINVAL;
		val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
		mask |= e->mask << e->shift_r;
	}

2547
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
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2548 2549 2550
}
EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);

F
Frank Mandarino 已提交
2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567
/**
 * snd_soc_info_enum_ext - external enumerated single mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about an external enumerated
 * single mixer.
 *
 * Returns 0 for success.
 */
int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
2568
	uinfo->value.enumerated.items = e->max;
F
Frank Mandarino 已提交
2569

2570 2571
	if (uinfo->value.enumerated.item > e->max - 1)
		uinfo->value.enumerated.item = e->max - 1;
F
Frank Mandarino 已提交
2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589
	strcpy(uinfo->value.enumerated.name,
		e->texts[uinfo->value.enumerated.item]);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);

/**
 * snd_soc_info_volsw_ext - external single mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a single external mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
P
Philipp Zabel 已提交
2590 2591
	int max = kcontrol->private_value;

2592
	if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
2593 2594 2595
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
F
Frank Mandarino 已提交
2596 2597 2598

	uinfo->count = 1;
	uinfo->value.integer.min = 0;
P
Philipp Zabel 已提交
2599
	uinfo->value.integer.max = max;
F
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2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);

/**
 * snd_soc_info_volsw - single mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a single mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
2616 2617
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2618
	int platform_max;
2619
	unsigned int shift = mc->shift;
2620
	unsigned int rshift = mc->rshift;
F
Frank Mandarino 已提交
2621

2622 2623 2624 2625 2626
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

	if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
2627 2628 2629 2630
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;

F
Frank Mandarino 已提交
2631 2632
	uinfo->count = shift == rshift ? 1 : 2;
	uinfo->value.integer.min = 0;
2633
	uinfo->value.integer.max = platform_max;
F
Frank Mandarino 已提交
2634 2635 2636 2637 2638 2639 2640
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw);

/**
 * snd_soc_get_volsw - single mixer get callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2641
 * @ucontrol: control element information
F
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2642 2643 2644 2645 2646 2647 2648 2649
 *
 * Callback to get the value of a single mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2650 2651
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2652
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2653 2654 2655
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
2656
	int max = mc->max;
2657 2658
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2659 2660 2661 2662 2663 2664 2665 2666

	ucontrol->value.integer.value[0] =
		(snd_soc_read(codec, reg) >> shift) & mask;
	if (shift != rshift)
		ucontrol->value.integer.value[1] =
			(snd_soc_read(codec, reg) >> rshift) & mask;
	if (invert) {
		ucontrol->value.integer.value[0] =
P
Philipp Zabel 已提交
2667
			max - ucontrol->value.integer.value[0];
F
Frank Mandarino 已提交
2668 2669
		if (shift != rshift)
			ucontrol->value.integer.value[1] =
P
Philipp Zabel 已提交
2670
				max - ucontrol->value.integer.value[1];
F
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2671 2672 2673 2674 2675 2676 2677 2678 2679
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw);

/**
 * snd_soc_put_volsw - single mixer put callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2680
 * @ucontrol: control element information
F
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2681 2682 2683 2684 2685 2686 2687 2688
 *
 * Callback to set the value of a single mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2689 2690
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2691
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2692 2693 2694
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
2695
	int max = mc->max;
2696 2697
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
2698
	unsigned int val, val2, val_mask;
F
Frank Mandarino 已提交
2699 2700 2701

	val = (ucontrol->value.integer.value[0] & mask);
	if (invert)
P
Philipp Zabel 已提交
2702
		val = max - val;
F
Frank Mandarino 已提交
2703 2704 2705 2706 2707
	val_mask = mask << shift;
	val = val << shift;
	if (shift != rshift) {
		val2 = (ucontrol->value.integer.value[1] & mask);
		if (invert)
P
Philipp Zabel 已提交
2708
			val2 = max - val2;
F
Frank Mandarino 已提交
2709 2710 2711
		val_mask |= mask << rshift;
		val |= val2 << rshift;
	}
2712
	return snd_soc_update_bits_locked(codec, reg, val_mask, val);
F
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2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw);

/**
 * snd_soc_info_volsw_2r - double mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a double mixer control that
 * spans 2 codec registers.
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
2729 2730
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2731
	int platform_max;
P
Philipp Zabel 已提交
2732

2733 2734 2735 2736 2737
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

	if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
2738 2739 2740
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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2741 2742 2743

	uinfo->count = 2;
	uinfo->value.integer.min = 0;
2744
	uinfo->value.integer.max = platform_max;
F
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	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);

/**
 * snd_soc_get_volsw_2r - double mixer get callback
 * @kcontrol: mixer control
M
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 * @ucontrol: control element information
F
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 *
 * Callback to get the value of a double mixer control that spans 2 registers.
 *
 * Returns 0 for success.
 */
int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2761 2762
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2763
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2764 2765 2766
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
2767
	int max = mc->max;
2768
	unsigned int mask = (1 << fls(max)) - 1;
2769
	unsigned int invert = mc->invert;
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	ucontrol->value.integer.value[0] =
		(snd_soc_read(codec, reg) >> shift) & mask;
	ucontrol->value.integer.value[1] =
		(snd_soc_read(codec, reg2) >> shift) & mask;
	if (invert) {
		ucontrol->value.integer.value[0] =
P
Philipp Zabel 已提交
2777
			max - ucontrol->value.integer.value[0];
F
Frank Mandarino 已提交
2778
		ucontrol->value.integer.value[1] =
P
Philipp Zabel 已提交
2779
			max - ucontrol->value.integer.value[1];
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Frank Mandarino 已提交
2780 2781 2782 2783 2784 2785 2786 2787 2788
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);

/**
 * snd_soc_put_volsw_2r - double mixer set callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2789
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2790 2791 2792 2793 2794 2795 2796 2797
 *
 * Callback to set the value of a double mixer control that spans 2 registers.
 *
 * Returns 0 for success.
 */
int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2798 2799
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2800
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2801 2802 2803
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
2804
	int max = mc->max;
2805 2806
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2807
	int err;
2808
	unsigned int val, val2, val_mask;
F
Frank Mandarino 已提交
2809 2810 2811 2812 2813 2814

	val_mask = mask << shift;
	val = (ucontrol->value.integer.value[0] & mask);
	val2 = (ucontrol->value.integer.value[1] & mask);

	if (invert) {
P
Philipp Zabel 已提交
2815 2816
		val = max - val;
		val2 = max - val2;
F
Frank Mandarino 已提交
2817 2818 2819 2820 2821
	}

	val = val << shift;
	val2 = val2 << shift;

2822
	err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2823
	if (err < 0)
F
Frank Mandarino 已提交
2824 2825
		return err;

2826
	err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
F
Frank Mandarino 已提交
2827 2828 2829 2830
	return err;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);

2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842
/**
 * snd_soc_info_volsw_s8 - signed mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a signed mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
2843 2844
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2845
	int platform_max;
2846
	int min = mc->min;
2847

2848 2849 2850 2851
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

2852 2853 2854
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
2855
	uinfo->value.integer.max = platform_max - min;
2856 2857 2858 2859 2860 2861 2862
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);

/**
 * snd_soc_get_volsw_s8 - signed mixer get callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2863
 * @ucontrol: control element information
2864 2865 2866 2867 2868 2869 2870 2871
 *
 * Callback to get the value of a signed mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2872 2873
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2874
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2875
	unsigned int reg = mc->reg;
2876
	int min = mc->min;
2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889
	int val = snd_soc_read(codec, reg);

	ucontrol->value.integer.value[0] =
		((signed char)(val & 0xff))-min;
	ucontrol->value.integer.value[1] =
		((signed char)((val >> 8) & 0xff))-min;
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);

/**
 * snd_soc_put_volsw_sgn - signed mixer put callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2890
 * @ucontrol: control element information
2891 2892 2893 2894 2895 2896 2897 2898
 *
 * Callback to set the value of a signed mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2899 2900
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2901
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2902
	unsigned int reg = mc->reg;
2903
	int min = mc->min;
2904
	unsigned int val;
2905 2906 2907 2908

	val = (ucontrol->value.integer.value[0]+min) & 0xff;
	val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;

2909
	return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2910 2911 2912
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);

2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924
/**
 * snd_soc_limit_volume - Set new limit to an existing volume control.
 *
 * @codec: where to look for the control
 * @name: Name of the control
 * @max: new maximum limit
 *
 * Return 0 for success, else error.
 */
int snd_soc_limit_volume(struct snd_soc_codec *codec,
	const char *name, int max)
{
2925
	struct snd_card *card = codec->card->snd_card;
2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943
	struct snd_kcontrol *kctl;
	struct soc_mixer_control *mc;
	int found = 0;
	int ret = -EINVAL;

	/* Sanity check for name and max */
	if (unlikely(!name || max <= 0))
		return -EINVAL;

	list_for_each_entry(kctl, &card->controls, list) {
		if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
			found = 1;
			break;
		}
	}
	if (found) {
		mc = (struct soc_mixer_control *)kctl->private_value;
		if (max <= mc->max) {
2944
			mc->platform_max = max;
2945 2946 2947 2948 2949 2950 2951
			ret = 0;
		}
	}
	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_limit_volume);

2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995
/**
 * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
 *  mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_info *uinfo)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int max = mc->max;
	int min = mc->min;

	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = max-min;

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);

/**
 * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
 *  mixer get callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Returns 0 for success.
 */
int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	unsigned int mask = (1<<mc->shift)-1;
	int min = mc->min;
	int val = snd_soc_read(codec, mc->reg) & mask;
	int valr = snd_soc_read(codec, mc->rreg) & mask;

2996 2997
	ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
	ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);

/**
 * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
 *  mixer put callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Returns 0 for success.
 */
int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	unsigned int mask = (1<<mc->shift)-1;
	int min = mc->min;
	int ret;
	unsigned int val, valr, oval, ovalr;

	val = ((ucontrol->value.integer.value[0]+min) & 0xff);
	val &= mask;
	valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
	valr &= mask;

	oval = snd_soc_read(codec, mc->reg) & mask;
	ovalr = snd_soc_read(codec, mc->rreg) & mask;

	ret = 0;
	if (oval != val) {
		ret = snd_soc_write(codec, mc->reg, val);
		if (ret < 0)
3033
			return ret;
3034 3035 3036 3037
	}
	if (ovalr != valr) {
		ret = snd_soc_write(codec, mc->rreg, valr);
		if (ret < 0)
3038
			return ret;
3039 3040 3041 3042 3043 3044
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);

3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056
/**
 * 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)
{
3057 3058
	if (dai->driver && dai->driver->ops->set_sysclk)
		return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3059 3060 3061 3062 3063 3064 3065 3066
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);

/**
 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
 * @dai: DAI
M
Mark Brown 已提交
3067
 * @div_id: DAI specific clock divider ID
3068 3069 3070 3071 3072 3073 3074 3075 3076
 * @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)
{
3077 3078
	if (dai->driver && dai->driver->ops->set_clkdiv)
		return dai->driver->ops->set_clkdiv(dai, div_id, div);
3079 3080 3081 3082 3083 3084 3085 3086 3087
	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
3088
 * @source: DAI specific source for the PLL
3089 3090 3091 3092 3093
 * @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.
 */
3094 3095
int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
	unsigned int freq_in, unsigned int freq_out)
3096
{
3097 3098
	if (dai->driver && dai->driver->ops->set_pll)
		return dai->driver->ops->set_pll(dai, pll_id, source,
3099
					 freq_in, freq_out);
3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);

/**
 * 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)
{
3114 3115
	if (dai->driver && dai->driver->ops->set_fmt)
		return dai->driver->ops->set_fmt(dai, fmt);
3116 3117 3118 3119 3120 3121 3122 3123
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);

/**
 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
 * @dai: DAI
3124 3125
 * @tx_mask: bitmask representing active TX slots.
 * @rx_mask: bitmask representing active RX slots.
3126
 * @slots: Number of slots in use.
3127
 * @slot_width: Width in bits for each slot.
3128 3129 3130 3131 3132
 *
 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
 * specific.
 */
int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
3133
	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3134
{
3135 3136
	if (dai->driver && dai->driver->ops->set_tdm_slot)
		return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3137
				slots, slot_width);
3138 3139 3140 3141 3142
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);

3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158
/**
 * 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)
{
3159 3160
	if (dai->driver && dai->driver->ops->set_channel_map)
		return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3161 3162 3163 3164 3165 3166
			rx_num, rx_slot);
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);

3167 3168 3169 3170 3171 3172 3173 3174 3175
/**
 * 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)
{
3176 3177
	if (dai->driver && dai->driver->ops->set_tristate)
		return dai->driver->ops->set_tristate(dai, tristate);
3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191
	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
 *
 * Mutes the DAI DAC.
 */
int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
{
3192 3193
	if (dai->driver && dai->driver->ops->digital_mute)
		return dai->driver->ops->digital_mute(dai, mute);
3194 3195 3196 3197 3198
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);

M
Mark Brown 已提交
3199 3200 3201
/**
 * snd_soc_register_card - Register a card with the ASoC core
 *
M
Mark Brown 已提交
3202
 * @card: Card to register
M
Mark Brown 已提交
3203 3204
 *
 */
3205
int snd_soc_register_card(struct snd_soc_card *card)
M
Mark Brown 已提交
3206
{
3207 3208
	int i;

M
Mark Brown 已提交
3209 3210 3211
	if (!card->name || !card->dev)
		return -EINVAL;

3212 3213
	snd_soc_initialize_card_lists(card);

3214 3215
	soc_init_card_debugfs(card);

3216 3217 3218
	card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
			    (card->num_links + card->num_aux_devs),
			    GFP_KERNEL);
3219 3220
	if (card->rtd == NULL)
		return -ENOMEM;
3221
	card->rtd_aux = &card->rtd[card->num_links];
3222 3223 3224 3225

	for (i = 0; i < card->num_links; i++)
		card->rtd[i].dai_link = &card->dai_link[i];

M
Mark Brown 已提交
3226 3227
	INIT_LIST_HEAD(&card->list);
	card->instantiated = 0;
3228
	mutex_init(&card->mutex);
M
Mark Brown 已提交
3229 3230 3231

	mutex_lock(&client_mutex);
	list_add(&card->list, &card_list);
3232
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
3233 3234 3235 3236 3237 3238
	mutex_unlock(&client_mutex);

	dev_dbg(card->dev, "Registered card '%s'\n", card->name);

	return 0;
}
3239
EXPORT_SYMBOL_GPL(snd_soc_register_card);
M
Mark Brown 已提交
3240 3241 3242 3243

/**
 * snd_soc_unregister_card - Unregister a card with the ASoC core
 *
M
Mark Brown 已提交
3244
 * @card: Card to unregister
M
Mark Brown 已提交
3245 3246
 *
 */
3247
int snd_soc_unregister_card(struct snd_soc_card *card)
M
Mark Brown 已提交
3248
{
3249 3250
	if (card->instantiated)
		soc_cleanup_card_resources(card);
M
Mark Brown 已提交
3251 3252 3253 3254 3255 3256 3257
	mutex_lock(&client_mutex);
	list_del(&card->list);
	mutex_unlock(&client_mutex);
	dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);

	return 0;
}
3258
EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
M
Mark Brown 已提交
3259

3260 3261 3262 3263
/*
 * Simplify DAI link configuration by removing ".-1" from device names
 * and sanitizing names.
 */
3264
static char *fmt_single_name(struct device *dev, int *id)
3265 3266 3267 3268 3269 3270 3271
{
	char *found, name[NAME_SIZE];
	int id1, id2;

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

3272
	strlcpy(name, dev_name(dev), NAME_SIZE);
3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290

	/* 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 */
3291
			*id = ((id1 & 0xffff) << 16) + id2;
3292 3293 3294

			/* sanitize component name for DAI link creation */
			snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3295
			strlcpy(name, tmp, NAME_SIZE);
3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318
		} 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) {
		printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
				dev_name(dev));
		return NULL;
	}

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

M
Mark Brown 已提交
3319 3320 3321
/**
 * snd_soc_register_dai - Register a DAI with the ASoC core
 *
M
Mark Brown 已提交
3322
 * @dai: DAI to register
M
Mark Brown 已提交
3323
 */
3324 3325
int snd_soc_register_dai(struct device *dev,
		struct snd_soc_dai_driver *dai_drv)
M
Mark Brown 已提交
3326
{
3327 3328 3329
	struct snd_soc_dai *dai;

	dev_dbg(dev, "dai register %s\n", dev_name(dev));
M
Mark Brown 已提交
3330

3331 3332 3333
	dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
	if (dai == NULL)
			return -ENOMEM;
M
Mark Brown 已提交
3334

3335 3336 3337 3338 3339 3340
	/* create DAI component name */
	dai->name = fmt_single_name(dev, &dai->id);
	if (dai->name == NULL) {
		kfree(dai);
		return -ENOMEM;
	}
3341

3342 3343 3344 3345
	dai->dev = dev;
	dai->driver = dai_drv;
	if (!dai->driver->ops)
		dai->driver->ops = &null_dai_ops;
M
Mark Brown 已提交
3346 3347 3348

	mutex_lock(&client_mutex);
	list_add(&dai->list, &dai_list);
3349
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360
	mutex_unlock(&client_mutex);

	pr_debug("Registered DAI '%s'\n", dai->name);

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_register_dai);

/**
 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
 *
M
Mark Brown 已提交
3361
 * @dai: DAI to unregister
M
Mark Brown 已提交
3362
 */
3363
void snd_soc_unregister_dai(struct device *dev)
M
Mark Brown 已提交
3364
{
3365 3366 3367 3368 3369 3370 3371 3372 3373
	struct snd_soc_dai *dai;

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

found:
M
Mark Brown 已提交
3374 3375 3376 3377 3378
	mutex_lock(&client_mutex);
	list_del(&dai->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered DAI '%s'\n", dai->name);
3379 3380
	kfree(dai->name);
	kfree(dai);
M
Mark Brown 已提交
3381 3382 3383 3384 3385 3386
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);

/**
 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
 *
M
Mark Brown 已提交
3387 3388
 * @dai: Array of DAIs to register
 * @count: Number of DAIs
M
Mark Brown 已提交
3389
 */
3390 3391
int snd_soc_register_dais(struct device *dev,
		struct snd_soc_dai_driver *dai_drv, size_t count)
M
Mark Brown 已提交
3392
{
3393 3394 3395
	struct snd_soc_dai *dai;
	int i, ret = 0;

3396
	dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
M
Mark Brown 已提交
3397 3398

	for (i = 0; i < count; i++) {
3399 3400

		dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3401 3402 3403 3404
		if (dai == NULL) {
			ret = -ENOMEM;
			goto err;
		}
3405 3406 3407 3408 3409 3410

		/* create DAI component name */
		dai->name = fmt_multiple_name(dev, &dai_drv[i]);
		if (dai->name == NULL) {
			kfree(dai);
			ret = -EINVAL;
M
Mark Brown 已提交
3411
			goto err;
3412 3413 3414 3415
		}

		dai->dev = dev;
		dai->driver = &dai_drv[i];
3416 3417 3418 3419
		if (dai->driver->id)
			dai->id = dai->driver->id;
		else
			dai->id = i;
3420 3421 3422 3423 3424 3425 3426 3427
		if (!dai->driver->ops)
			dai->driver->ops = &null_dai_ops;

		mutex_lock(&client_mutex);
		list_add(&dai->list, &dai_list);
		mutex_unlock(&client_mutex);

		pr_debug("Registered DAI '%s'\n", dai->name);
M
Mark Brown 已提交
3428 3429
	}

3430
	mutex_lock(&client_mutex);
3431
	snd_soc_instantiate_cards();
3432
	mutex_unlock(&client_mutex);
M
Mark Brown 已提交
3433 3434 3435 3436
	return 0;

err:
	for (i--; i >= 0; i--)
3437
		snd_soc_unregister_dai(dev);
M
Mark Brown 已提交
3438 3439 3440 3441 3442 3443 3444 3445

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_register_dais);

/**
 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
 *
M
Mark Brown 已提交
3446 3447
 * @dai: Array of DAIs to unregister
 * @count: Number of DAIs
M
Mark Brown 已提交
3448
 */
3449
void snd_soc_unregister_dais(struct device *dev, size_t count)
M
Mark Brown 已提交
3450 3451 3452 3453
{
	int i;

	for (i = 0; i < count; i++)
3454
		snd_soc_unregister_dai(dev);
M
Mark Brown 已提交
3455 3456 3457
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);

M
Mark Brown 已提交
3458 3459 3460
/**
 * snd_soc_register_platform - Register a platform with the ASoC core
 *
M
Mark Brown 已提交
3461
 * @platform: platform to register
M
Mark Brown 已提交
3462
 */
3463 3464
int snd_soc_register_platform(struct device *dev,
		struct snd_soc_platform_driver *platform_drv)
M
Mark Brown 已提交
3465
{
3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479
	struct snd_soc_platform *platform;

	dev_dbg(dev, "platform register %s\n", dev_name(dev));

	platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
	if (platform == NULL)
			return -ENOMEM;

	/* create platform component name */
	platform->name = fmt_single_name(dev, &platform->id);
	if (platform->name == NULL) {
		kfree(platform);
		return -ENOMEM;
	}
M
Mark Brown 已提交
3480

3481 3482
	platform->dev = dev;
	platform->driver = platform_drv;
M
Mark Brown 已提交
3483 3484 3485

	mutex_lock(&client_mutex);
	list_add(&platform->list, &platform_list);
3486
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497
	mutex_unlock(&client_mutex);

	pr_debug("Registered platform '%s'\n", platform->name);

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_register_platform);

/**
 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
 *
M
Mark Brown 已提交
3498
 * @platform: platform to unregister
M
Mark Brown 已提交
3499
 */
3500
void snd_soc_unregister_platform(struct device *dev)
M
Mark Brown 已提交
3501
{
3502 3503 3504 3505 3506 3507 3508 3509 3510
	struct snd_soc_platform *platform;

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

found:
M
Mark Brown 已提交
3511 3512 3513 3514 3515
	mutex_lock(&client_mutex);
	list_del(&platform->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered platform '%s'\n", platform->name);
3516 3517
	kfree(platform->name);
	kfree(platform);
M
Mark Brown 已提交
3518 3519 3520
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);

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
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];
}

M
Mark Brown 已提交
3554 3555 3556
/**
 * snd_soc_register_codec - Register a codec with the ASoC core
 *
M
Mark Brown 已提交
3557
 * @codec: codec to register
M
Mark Brown 已提交
3558
 */
3559
int snd_soc_register_codec(struct device *dev,
3560 3561 3562
			   const struct snd_soc_codec_driver *codec_drv,
			   struct snd_soc_dai_driver *dai_drv,
			   int num_dai)
M
Mark Brown 已提交
3563
{
3564
	size_t reg_size;
3565 3566
	struct snd_soc_codec *codec;
	int ret, i;
3567

3568 3569 3570 3571 3572
	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
3573

3574 3575 3576 3577 3578 3579 3580
	/* create CODEC component name */
	codec->name = fmt_single_name(dev, &codec->id);
	if (codec->name == NULL) {
		kfree(codec);
		return -ENOMEM;
	}

3581 3582 3583 3584 3585
	if (codec_drv->compress_type)
		codec->compress_type = codec_drv->compress_type;
	else
		codec->compress_type = SND_SOC_FLAT_COMPRESSION;

3586 3587
	codec->write = codec_drv->write;
	codec->read = codec_drv->read;
3588 3589
	codec->volatile_register = codec_drv->volatile_register;
	codec->readable_register = codec_drv->readable_register;
L
Liam Girdwood 已提交
3590 3591 3592
	codec->dapm.bias_level = SND_SOC_BIAS_OFF;
	codec->dapm.dev = dev;
	codec->dapm.codec = codec;
3593
	codec->dapm.seq_notifier = codec_drv->seq_notifier;
3594 3595 3596 3597
	codec->dev = dev;
	codec->driver = codec_drv;
	codec->num_dai = num_dai;
	mutex_init(&codec->mutex);
L
Liam Girdwood 已提交
3598

3599 3600
	/* allocate CODEC register cache */
	if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3601
		reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3602
		codec->reg_size = reg_size;
3603 3604 3605 3606 3607 3608
		/* it is necessary to make a copy of the default register cache
		 * because in the case of using a compression type that requires
		 * the default register cache to be marked as __devinitconst the
		 * kernel might have freed the array by the time we initialize
		 * the cache.
		 */
3609 3610 3611 3612 3613 3614 3615
		if (codec_drv->reg_cache_default) {
			codec->reg_def_copy = kmemdup(codec_drv->reg_cache_default,
						      reg_size, GFP_KERNEL);
			if (!codec->reg_def_copy) {
				ret = -ENOMEM;
				goto fail;
			}
3616
		}
3617 3618
	}

3619 3620 3621 3622 3623 3624 3625
	if (codec_drv->reg_access_size && codec_drv->reg_access_default) {
		if (!codec->volatile_register)
			codec->volatile_register = snd_soc_default_volatile_register;
		if (!codec->readable_register)
			codec->readable_register = snd_soc_default_readable_register;
	}

3626 3627 3628 3629 3630
	for (i = 0; i < num_dai; i++) {
		fixup_codec_formats(&dai_drv[i].playback);
		fixup_codec_formats(&dai_drv[i].capture);
	}

3631 3632 3633 3634
	/* register any DAIs */
	if (num_dai) {
		ret = snd_soc_register_dais(dev, dai_drv, num_dai);
		if (ret < 0)
3635
			goto fail;
3636
	}
3637

M
Mark Brown 已提交
3638 3639 3640 3641 3642 3643 3644
	mutex_lock(&client_mutex);
	list_add(&codec->list, &codec_list);
	snd_soc_instantiate_cards();
	mutex_unlock(&client_mutex);

	pr_debug("Registered codec '%s'\n", codec->name);
	return 0;
3645

3646
fail:
3647 3648
	kfree(codec->reg_def_copy);
	codec->reg_def_copy = NULL;
3649 3650 3651
	kfree(codec->name);
	kfree(codec);
	return ret;
M
Mark Brown 已提交
3652 3653 3654 3655 3656 3657
}
EXPORT_SYMBOL_GPL(snd_soc_register_codec);

/**
 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
 *
M
Mark Brown 已提交
3658
 * @codec: codec to unregister
M
Mark Brown 已提交
3659
 */
3660
void snd_soc_unregister_codec(struct device *dev)
M
Mark Brown 已提交
3661
{
3662 3663 3664 3665 3666 3667 3668 3669 3670 3671
	struct snd_soc_codec *codec;
	int i;

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

found:
3672 3673 3674
	if (codec->num_dai)
		for (i = 0; i < codec->num_dai; i++)
			snd_soc_unregister_dai(dev);
3675

M
Mark Brown 已提交
3676 3677 3678 3679 3680
	mutex_lock(&client_mutex);
	list_del(&codec->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered codec '%s'\n", codec->name);
3681

3682
	snd_soc_cache_exit(codec);
3683
	kfree(codec->reg_def_copy);
3684
	kfree(codec->name);
3685
	kfree(codec);
M
Mark Brown 已提交
3686 3687 3688
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);

3689
static int __init snd_soc_init(void)
F
Frank Mandarino 已提交
3690
{
3691
#ifdef CONFIG_DEBUG_FS
3692 3693
	snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
	if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3694 3695
		printk(KERN_WARNING
		       "ASoC: Failed to create debugfs directory\n");
3696
		snd_soc_debugfs_root = NULL;
3697
	}
3698

3699
	if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3700 3701 3702
				 &codec_list_fops))
		pr_warn("ASoC: Failed to create CODEC list debugfs file\n");

3703
	if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
M
Mark Brown 已提交
3704 3705
				 &dai_list_fops))
		pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3706

3707
	if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3708 3709
				 &platform_list_fops))
		pr_warn("ASoC: Failed to create platform list debugfs file\n");
3710 3711
#endif

F
Frank Mandarino 已提交
3712 3713
	return platform_driver_register(&soc_driver);
}
3714
module_init(snd_soc_init);
F
Frank Mandarino 已提交
3715

M
Mark Brown 已提交
3716
static void __exit snd_soc_exit(void)
F
Frank Mandarino 已提交
3717
{
3718
#ifdef CONFIG_DEBUG_FS
3719
	debugfs_remove_recursive(snd_soc_debugfs_root);
3720
#endif
3721
	platform_driver_unregister(&soc_driver);
F
Frank Mandarino 已提交
3722 3723 3724 3725
}
module_exit(snd_soc_exit);

/* Module information */
3726
MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
F
Frank Mandarino 已提交
3727 3728
MODULE_DESCRIPTION("ALSA SoC Core");
MODULE_LICENSE("GPL");
3729
MODULE_ALIAS("platform:soc-audio");