soc-core.c 100.3 KB
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/*
 * soc-core.c  --  ALSA SoC Audio Layer
 *
 * Copyright 2005 Wolfson Microelectronics PLC.
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 * Copyright 2005 Openedhand Ltd.
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 * Copyright (C) 2010 Slimlogic Ltd.
 * Copyright (C) 2010 Texas Instruments Inc.
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 *
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 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
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 *         with code, comments and ideas from :-
 *         Richard Purdie <richard@openedhand.com>
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 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  TODO:
 *   o Add hw rules to enforce rates, etc.
 *   o More testing with other codecs/machines.
 *   o Add more codecs and platforms to ensure good API coverage.
 *   o Support TDM on PCM and I2S
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/bitops.h>
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#include <linux/debugfs.h>
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#include <linux/platform_device.h>
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#include <linux/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)
{
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	int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
	int regsize = codec->driver->reg_word_size * 2;
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	int ret;
	char tmpbuf[len + 1];
	char regbuf[regsize + 1];

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

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

	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 = min_bytes_needed(codec->driver->reg_cache_size) * 2;
	regsize = codec->driver->reg_word_size * 2;
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	len = wordsize + regsize + 2 + 1;

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

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	if (codec->driver->reg_cache_step)
		step = codec->driver->reg_cache_step;
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	for (i = 0; i < codec->driver->reg_cache_size; i += step) {
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		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);
	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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	snd_soc_dapm_debugfs_init(&codec->dapm, codec->debugfs_codec_root);
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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)
		return 0;

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	/* This can happen if multiple streams are starting simultaneously -
	 * the second can need to get its constraints before the first has
	 * picked a rate.  Complain and allow the application to carry on.
	 */
	if (!rtd->rate) {
		dev_warn(&rtd->dev,
			 "Not enforcing symmetric_rates due to race\n");
		return 0;
	}

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	dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);

	ret = snd_pcm_hw_constraint_minmax(substream->runtime,
					   SNDRV_PCM_HW_PARAM_RATE,
					   rtd->rate, rtd->rate);
	if (ret < 0) {
		dev_err(&rtd->dev,
			"Unable to apply rate symmetry constraint: %d\n", ret);
		return ret;
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	}

	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 && platform->driver->ops->open) {
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		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);
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		runtime->hw.formats =
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			codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
616
		runtime->hw.rates =
617 618
			codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
		if (codec_dai_drv->capture.rates
619
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
620 621
			runtime->hw.rates |= cpu_dai_drv->capture.rates;
		if (cpu_dai_drv->capture.rates
622
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
623
			runtime->hw.rates |= codec_dai_drv->capture.rates;
F
Frank Mandarino 已提交
624 625
	}

L
Lu Guanqun 已提交
626
	ret = -EINVAL;
F
Frank Mandarino 已提交
627 628 629
	snd_pcm_limit_hw_rates(runtime);
	if (!runtime->hw.rates) {
		printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
630
			codec_dai->name, cpu_dai->name);
631
		goto config_err;
F
Frank Mandarino 已提交
632 633 634
	}
	if (!runtime->hw.formats) {
		printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
635
			codec_dai->name, cpu_dai->name);
636
		goto config_err;
F
Frank Mandarino 已提交
637
	}
638 639
	if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
	    runtime->hw.channels_min > runtime->hw.channels_max) {
F
Frank Mandarino 已提交
640
		printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
641
				codec_dai->name, cpu_dai->name);
642
		goto config_err;
F
Frank Mandarino 已提交
643 644
	}

645 646 647 648
	/* 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)
649
			goto config_err;
650 651
	}

652 653
	pr_debug("asoc: %s <-> %s info:\n",
			codec_dai->name, cpu_dai->name);
654 655 656 657 658
	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
659

660
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
661 662
		cpu_dai->playback_active++;
		codec_dai->playback_active++;
663
	} else {
664 665
		cpu_dai->capture_active++;
		codec_dai->capture_active++;
666 667 668
	}
	cpu_dai->active++;
	codec_dai->active++;
669
	rtd->codec->active++;
F
Frank Mandarino 已提交
670 671 672
	mutex_unlock(&pcm_mutex);
	return 0;

673
config_err:
674 675
	if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
		rtd->dai_link->ops->shutdown(substream);
F
Frank Mandarino 已提交
676

677
machine_err:
678 679
	if (codec_dai->driver->ops->shutdown)
		codec_dai->driver->ops->shutdown(substream, codec_dai);
680

681
codec_dai_err:
682
	if (platform->driver->ops && platform->driver->ops->close)
683
		platform->driver->ops->close(substream);
F
Frank Mandarino 已提交
684 685

platform_err:
686 687
	if (cpu_dai->driver->ops->shutdown)
		cpu_dai->driver->ops->shutdown(substream, cpu_dai);
F
Frank Mandarino 已提交
688 689 690 691 692 693
out:
	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
694
 * Power down the audio subsystem pmdown_time msecs after close is called.
F
Frank Mandarino 已提交
695 696 697
 * This is to ensure there are no pops or clicks in between any music tracks
 * due to DAPM power cycling.
 */
698
static void close_delayed_work(struct work_struct *work)
F
Frank Mandarino 已提交
699
{
700 701 702
	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
703 704

	mutex_lock(&pcm_mutex);
705 706 707 708 709 710 711 712 713 714 715 716

	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
717
	}
718

F
Frank Mandarino 已提交
719 720 721 722 723 724 725 726 727 728 729
	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;
730 731 732 733
	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
734 735 736

	mutex_lock(&pcm_mutex);

737
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
738 739
		cpu_dai->playback_active--;
		codec_dai->playback_active--;
740
	} else {
741 742
		cpu_dai->capture_active--;
		codec_dai->capture_active--;
F
Frank Mandarino 已提交
743
	}
744 745 746

	cpu_dai->active--;
	codec_dai->active--;
F
Frank Mandarino 已提交
747 748
	codec->active--;

749 750 751 752 753 754
	/* 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);

755 756
	if (cpu_dai->driver->ops->shutdown)
		cpu_dai->driver->ops->shutdown(substream, cpu_dai);
F
Frank Mandarino 已提交
757

758 759
	if (codec_dai->driver->ops->shutdown)
		codec_dai->driver->ops->shutdown(substream, codec_dai);
F
Frank Mandarino 已提交
760

761 762
	if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
		rtd->dai_link->ops->shutdown(substream);
F
Frank Mandarino 已提交
763

764
	if (platform->driver->ops && platform->driver->ops->close)
765 766
		platform->driver->ops->close(substream);
	cpu_dai->runtime = NULL;
F
Frank Mandarino 已提交
767 768 769

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		/* start delayed pop wq here for playback streams */
770
		codec_dai->pop_wait = 1;
771 772
		schedule_delayed_work(&rtd->delayed_work,
			msecs_to_jiffies(rtd->pmdown_time));
F
Frank Mandarino 已提交
773 774
	} else {
		/* capture streams can be powered down now */
775 776
		snd_soc_dapm_stream_event(rtd,
			codec_dai->driver->capture.stream_name,
777
			SND_SOC_DAPM_STREAM_STOP);
F
Frank Mandarino 已提交
778 779 780 781 782 783 784 785 786 787 788 789 790 791
	}

	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;
792 793 794
	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
795 796 797
	int ret = 0;

	mutex_lock(&pcm_mutex);
798

799 800
	if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
		ret = rtd->dai_link->ops->prepare(substream);
801 802 803 804 805 806
		if (ret < 0) {
			printk(KERN_ERR "asoc: machine prepare error\n");
			goto out;
		}
	}

807
	if (platform->driver->ops && platform->driver->ops->prepare) {
808
		ret = platform->driver->ops->prepare(substream);
809 810
		if (ret < 0) {
			printk(KERN_ERR "asoc: platform prepare error\n");
F
Frank Mandarino 已提交
811
			goto out;
812
		}
F
Frank Mandarino 已提交
813 814
	}

815 816
	if (codec_dai->driver->ops->prepare) {
		ret = codec_dai->driver->ops->prepare(substream, codec_dai);
817 818
		if (ret < 0) {
			printk(KERN_ERR "asoc: codec DAI prepare error\n");
F
Frank Mandarino 已提交
819
			goto out;
820
		}
F
Frank Mandarino 已提交
821 822
	}

823 824
	if (cpu_dai->driver->ops->prepare) {
		ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
825 826 827 828 829
		if (ret < 0) {
			printk(KERN_ERR "asoc: cpu DAI prepare error\n");
			goto out;
		}
	}
F
Frank Mandarino 已提交
830

831 832 833 834
	/* cancel any delayed stream shutdown that is pending */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
	    codec_dai->pop_wait) {
		codec_dai->pop_wait = 0;
835
		cancel_delayed_work(&rtd->delayed_work);
836
	}
F
Frank Mandarino 已提交
837

838
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
839 840
		snd_soc_dapm_stream_event(rtd,
					  codec_dai->driver->playback.stream_name,
841 842
					  SND_SOC_DAPM_STREAM_START);
	else
843 844
		snd_soc_dapm_stream_event(rtd,
					  codec_dai->driver->capture.stream_name,
845
					  SND_SOC_DAPM_STREAM_START);
846

847
	snd_soc_dai_digital_mute(codec_dai, 0);
F
Frank Mandarino 已提交
848 849 850 851 852 853 854 855 856 857 858 859 860 861 862

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;
863 864 865
	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
866 867 868 869
	int ret = 0;

	mutex_lock(&pcm_mutex);

870 871
	if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
		ret = rtd->dai_link->ops->hw_params(substream, params);
872 873
		if (ret < 0) {
			printk(KERN_ERR "asoc: machine hw_params failed\n");
F
Frank Mandarino 已提交
874
			goto out;
875
		}
F
Frank Mandarino 已提交
876 877
	}

878 879
	if (codec_dai->driver->ops->hw_params) {
		ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
F
Frank Mandarino 已提交
880 881
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't set codec %s hw params\n",
882 883
				codec_dai->name);
			goto codec_err;
F
Frank Mandarino 已提交
884 885 886
		}
	}

887 888
	if (cpu_dai->driver->ops->hw_params) {
		ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
F
Frank Mandarino 已提交
889
		if (ret < 0) {
890
			printk(KERN_ERR "asoc: interface %s hw params failed\n",
891
				cpu_dai->name);
F
Frank Mandarino 已提交
892 893 894 895
			goto interface_err;
		}
	}

896
	if (platform->driver->ops && platform->driver->ops->hw_params) {
897
		ret = platform->driver->ops->hw_params(substream, params);
F
Frank Mandarino 已提交
898
		if (ret < 0) {
899
			printk(KERN_ERR "asoc: platform %s hw params failed\n",
F
Frank Mandarino 已提交
900 901 902 903 904
				platform->name);
			goto platform_err;
		}
	}

905
	rtd->rate = params_rate(params);
906

F
Frank Mandarino 已提交
907 908 909 910 911
out:
	mutex_unlock(&pcm_mutex);
	return ret;

platform_err:
912 913
	if (cpu_dai->driver->ops->hw_free)
		cpu_dai->driver->ops->hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
914 915

interface_err:
916 917
	if (codec_dai->driver->ops->hw_free)
		codec_dai->driver->ops->hw_free(substream, codec_dai);
918 919

codec_err:
920 921
	if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
		rtd->dai_link->ops->hw_free(substream);
F
Frank Mandarino 已提交
922 923 924 925 926 927

	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
M
Mark Brown 已提交
928
 * Frees resources allocated by hw_params, can be called multiple times
F
Frank Mandarino 已提交
929 930 931 932
 */
static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
933 934 935 936
	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
937 938 939 940

	mutex_lock(&pcm_mutex);

	/* apply codec digital mute */
941 942
	if (!codec->active)
		snd_soc_dai_digital_mute(codec_dai, 1);
F
Frank Mandarino 已提交
943 944

	/* free any machine hw params */
945 946
	if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
		rtd->dai_link->ops->hw_free(substream);
F
Frank Mandarino 已提交
947 948

	/* free any DMA resources */
949
	if (platform->driver->ops && platform->driver->ops->hw_free)
950
		platform->driver->ops->hw_free(substream);
F
Frank Mandarino 已提交
951

M
Mark Brown 已提交
952
	/* now free hw params for the DAIs  */
953 954
	if (codec_dai->driver->ops->hw_free)
		codec_dai->driver->ops->hw_free(substream, codec_dai);
F
Frank Mandarino 已提交
955

956 957
	if (cpu_dai->driver->ops->hw_free)
		cpu_dai->driver->ops->hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
958 959 960 961 962 963 964 965

	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;
966 967 968
	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
969 970
	int ret;

971 972
	if (codec_dai->driver->ops->trigger) {
		ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
F
Frank Mandarino 已提交
973 974 975 976
		if (ret < 0)
			return ret;
	}

977
	if (platform->driver->ops && platform->driver->ops->trigger) {
978
		ret = platform->driver->ops->trigger(substream, cmd);
F
Frank Mandarino 已提交
979 980 981 982
		if (ret < 0)
			return ret;
	}

983 984
	if (cpu_dai->driver->ops->trigger) {
		ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
F
Frank Mandarino 已提交
985 986 987 988 989 990
		if (ret < 0)
			return ret;
	}
	return 0;
}

991 992
/*
 * soc level wrapper for pointer callback
993 994
 * If cpu_dai, codec_dai, platform driver has the delay callback, than
 * the runtime->delay will be updated accordingly.
995 996 997 998
 */
static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
999 1000 1001
	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;
1002
	struct snd_pcm_runtime *runtime = substream->runtime;
1003
	snd_pcm_uframes_t offset = 0;
1004
	snd_pcm_sframes_t delay = 0;
1005

1006
	if (platform->driver->ops && platform->driver->ops->pointer)
1007
		offset = platform->driver->ops->pointer(substream);
1008

1009 1010
	if (cpu_dai->driver->ops->delay)
		delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
1011

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

1015 1016
	if (platform->driver->delay)
		delay += platform->driver->delay(substream, codec_dai);
1017 1018 1019

	runtime->delay = delay;

1020 1021 1022
	return offset;
}

F
Frank Mandarino 已提交
1023 1024 1025 1026 1027 1028 1029 1030
/* 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,
1031
	.pointer	= soc_pcm_pointer,
F
Frank Mandarino 已提交
1032 1033
};

1034
#ifdef CONFIG_PM_SLEEP
F
Frank Mandarino 已提交
1035
/* powers down audio subsystem for suspend */
1036
int snd_soc_suspend(struct device *dev)
F
Frank Mandarino 已提交
1037
{
1038
	struct snd_soc_card *card = dev_get_drvdata(dev);
1039
	struct snd_soc_codec *codec;
F
Frank Mandarino 已提交
1040 1041
	int i;

1042 1043 1044
	/* If the initialization of this soc device failed, there is no codec
	 * associated with it. Just bail out in this case.
	 */
1045
	if (list_empty(&card->codec_dev_list))
1046 1047
		return 0;

1048 1049 1050
	/* Due to the resume being scheduled into a workqueue we could
	* suspend before that's finished - wait for it to complete.
	 */
1051 1052 1053
	snd_power_lock(card->snd_card);
	snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
	snd_power_unlock(card->snd_card);
1054 1055

	/* we're going to block userspace touching us until resume completes */
1056
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
1057

M
Mark Brown 已提交
1058
	/* mute any active DACs */
1059 1060 1061
	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;
1062

1063
		if (card->rtd[i].dai_link->ignore_suspend)
1064 1065
			continue;

1066 1067
		if (drv->ops->digital_mute && dai->playback_active)
			drv->ops->digital_mute(dai, 1);
F
Frank Mandarino 已提交
1068 1069
	}

1070
	/* suspend all pcms */
1071 1072
	for (i = 0; i < card->num_rtd; i++) {
		if (card->rtd[i].dai_link->ignore_suspend)
1073 1074
			continue;

1075
		snd_pcm_suspend_all(card->rtd[i].pcm);
1076
	}
1077

1078
	if (card->suspend_pre)
1079
		card->suspend_pre(card);
F
Frank Mandarino 已提交
1080

1081 1082 1083
	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;
1084

1085
		if (card->rtd[i].dai_link->ignore_suspend)
1086 1087
			continue;

1088 1089 1090 1091 1092 1093
		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
1094 1095 1096
	}

	/* close any waiting streams and save state */
1097
	for (i = 0; i < card->num_rtd; i++) {
1098
		flush_delayed_work_sync(&card->rtd[i].delayed_work);
L
Liam Girdwood 已提交
1099
		card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1100
	}
F
Frank Mandarino 已提交
1101

1102 1103
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1104

1105
		if (card->rtd[i].dai_link->ignore_suspend)
1106 1107
			continue;

1108 1109
		if (driver->playback.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
F
Frank Mandarino 已提交
1110
				SND_SOC_DAPM_STREAM_SUSPEND);
1111 1112 1113

		if (driver->capture.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
F
Frank Mandarino 已提交
1114 1115 1116
				SND_SOC_DAPM_STREAM_SUSPEND);
	}

1117
	/* suspend all CODECs */
1118
	list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1119 1120 1121
		/* 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
1122
			switch (codec->dapm.bias_level) {
1123 1124 1125 1126 1127 1128 1129 1130 1131
			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;
			}
1132 1133
		}
	}
F
Frank Mandarino 已提交
1134

1135 1136
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1137

1138
		if (card->rtd[i].dai_link->ignore_suspend)
1139 1140
			continue;

1141 1142
		if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
			cpu_dai->driver->suspend(cpu_dai);
F
Frank Mandarino 已提交
1143 1144
	}

1145
	if (card->suspend_post)
1146
		card->suspend_post(card);
F
Frank Mandarino 已提交
1147 1148 1149

	return 0;
}
1150
EXPORT_SYMBOL_GPL(snd_soc_suspend);
F
Frank Mandarino 已提交
1151

1152 1153 1154 1155
/* 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
1156
{
1157 1158
	struct snd_soc_card *card =
			container_of(work, struct snd_soc_card, deferred_resume_work);
1159
	struct snd_soc_codec *codec;
F
Frank Mandarino 已提交
1160 1161
	int i;

1162 1163 1164 1165
	/* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
	 * so userspace apps are blocked from touching us
	 */

1166
	dev_dbg(card->dev, "starting resume work\n");
1167

1168
	/* Bring us up into D2 so that DAPM starts enabling things */
1169
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1170

1171
	if (card->resume_pre)
1172
		card->resume_pre(card);
F
Frank Mandarino 已提交
1173

1174 1175 1176
	/* resume AC97 DAIs */
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1177

1178
		if (card->rtd[i].dai_link->ignore_suspend)
1179 1180
			continue;

1181 1182 1183 1184
		if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
			cpu_dai->driver->resume(cpu_dai);
	}

1185
	list_for_each_entry(codec, &card->codec_dev_list, card_list) {
1186 1187 1188 1189 1190
		/* 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
1191
			switch (codec->dapm.bias_level) {
1192 1193 1194 1195 1196 1197 1198 1199 1200
			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;
			}
1201 1202
		}
	}
F
Frank Mandarino 已提交
1203

1204 1205
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1206

1207
		if (card->rtd[i].dai_link->ignore_suspend)
1208 1209
			continue;

1210 1211
		if (driver->playback.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
F
Frank Mandarino 已提交
1212
				SND_SOC_DAPM_STREAM_RESUME);
1213 1214 1215

		if (driver->capture.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
F
Frank Mandarino 已提交
1216 1217 1218
				SND_SOC_DAPM_STREAM_RESUME);
	}

1219
	/* unmute any active DACs */
1220 1221 1222
	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;
1223

1224
		if (card->rtd[i].dai_link->ignore_suspend)
1225 1226
			continue;

1227 1228
		if (drv->ops->digital_mute && dai->playback_active)
			drv->ops->digital_mute(dai, 0);
F
Frank Mandarino 已提交
1229 1230
	}

1231 1232 1233
	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;
1234

1235
		if (card->rtd[i].dai_link->ignore_suspend)
1236 1237
			continue;

1238 1239 1240 1241 1242 1243
		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
1244 1245
	}

1246
	if (card->resume_post)
1247
		card->resume_post(card);
F
Frank Mandarino 已提交
1248

1249
	dev_dbg(card->dev, "resume work completed\n");
1250 1251

	/* userspace can access us now we are back as we were before */
1252
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1253 1254 1255
}

/* powers up audio subsystem after a suspend */
1256
int snd_soc_resume(struct device *dev)
1257
{
1258
	struct snd_soc_card *card = dev_get_drvdata(dev);
1259
	int i;
1260

1261 1262 1263 1264 1265
	/* 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.
	 */
1266 1267 1268 1269 1270 1271 1272 1273 1274 1275
	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");
		}
1276
	}
1277

F
Frank Mandarino 已提交
1278 1279
	return 0;
}
1280
EXPORT_SYMBOL_GPL(snd_soc_resume);
F
Frank Mandarino 已提交
1281
#else
1282 1283
#define snd_soc_suspend NULL
#define snd_soc_resume NULL
F
Frank Mandarino 已提交
1284 1285
#endif

1286 1287 1288
static struct snd_soc_dai_ops null_dai_ops = {
};

1289
static int soc_bind_dai_link(struct snd_soc_card *card, int num)
F
Frank Mandarino 已提交
1290
{
1291 1292
	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
1293
	struct snd_soc_codec *codec;
1294
	struct snd_soc_platform *platform;
1295
	struct snd_soc_dai *codec_dai, *cpu_dai;
1296
	const char *platform_name;
1297

1298 1299 1300
	if (rtd->complete)
		return 1;
	dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1301

1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314
	/* 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;
1315 1316
		}
	}
1317 1318
	dev_dbg(card->dev, "CPU DAI %s not registered\n",
			dai_link->cpu_dai_name);
1319

1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337
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;
				}
1338
			}
1339 1340 1341 1342
			dev_dbg(card->dev, "CODEC DAI %s not registered\n",
					dai_link->codec_dai_name);

			goto find_platform;
1343
		}
1344 1345 1346
	}
	dev_dbg(card->dev, "CODEC %s not registered\n",
			dai_link->codec_name);
1347

1348
find_platform:
1349 1350
	/* do we need a platform? */
	if (rtd->platform)
1351
		goto out;
1352 1353 1354 1355 1356 1357 1358

	/* if there's no platform we match on the empty platform */
	platform_name = dai_link->platform_name;
	if (!platform_name)
		platform_name = "snd-soc-dummy";

	/* no, then find one from the set of registered platforms */
1359
	list_for_each_entry(platform, &platform_list, list) {
1360
		if (!strcmp(platform->name, platform_name)) {
1361 1362 1363
			rtd->platform = platform;
			goto out;
		}
1364 1365
	}

1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378
	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;
}

1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399
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);
}

1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410
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);
1411
		device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1412 1413 1414 1415 1416 1417 1418 1419 1420 1421
		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);
1422
		}
1423 1424 1425
		codec_dai->probed = 0;
		list_del(&codec_dai->card_list);
	}
1426

1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437
	/* 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);
	}
1438

1439
	/* remove the CODEC */
1440 1441
	if (codec && codec->probed)
		soc_remove_codec(codec);
F
Frank Mandarino 已提交
1442

1443 1444 1445 1446 1447 1448
	/* 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
1449
		}
1450 1451 1452
		cpu_dai->probed = 0;
		list_del(&cpu_dai->card_list);
		module_put(cpu_dai->dev->driver->owner);
F
Frank Mandarino 已提交
1453
	}
1454
}
F
Frank Mandarino 已提交
1455

1456 1457 1458 1459 1460 1461 1462 1463 1464 1465
static void soc_remove_dai_links(struct snd_soc_card *card)
{
	int i;

	for (i = 0; i < card->num_rtd; i++)
		soc_remove_dai_link(card, i);

	card->num_rtd = 0;
}

1466 1467 1468 1469 1470
static void soc_set_name_prefix(struct snd_soc_card *card,
				struct snd_soc_codec *codec)
{
	int i;

1471
	if (card->codec_conf == NULL)
1472 1473
		return;

1474 1475
	for (i = 0; i < card->num_configs; i++) {
		struct snd_soc_codec_conf *map = &card->codec_conf[i];
1476 1477 1478 1479 1480 1481 1482
		if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
			codec->name_prefix = map->name_prefix;
			break;
		}
	}
}

1483 1484 1485 1486
static int soc_probe_codec(struct snd_soc_card *card,
			   struct snd_soc_codec *codec)
{
	int ret = 0;
1487
	const struct snd_soc_codec_driver *driver = codec->driver;
1488 1489 1490 1491 1492

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

1493 1494 1495
	if (!try_module_get(codec->dev->driver->owner))
		return -ENODEV;

1496 1497
	soc_init_codec_debugfs(codec);

1498 1499 1500 1501
	if (driver->dapm_widgets)
		snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
					  driver->num_dapm_widgets);

1502 1503
	if (driver->probe) {
		ret = driver->probe(codec);
1504 1505 1506 1507
		if (ret < 0) {
			dev_err(codec->dev,
				"asoc: failed to probe CODEC %s: %d\n",
				codec->name, ret);
1508
			goto err_probe;
1509 1510 1511
		}
	}

1512 1513 1514
	if (driver->controls)
		snd_soc_add_controls(codec, driver->controls,
				     driver->num_controls);
1515 1516 1517 1518
	if (driver->dapm_routes)
		snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
					driver->num_dapm_routes);

1519 1520 1521
	/* mark codec as probed and add to card codec list */
	codec->probed = 1;
	list_add(&codec->card_list, &card->codec_dev_list);
1522
	list_add(&codec->dapm.list, &card->dapm_list);
1523

1524 1525 1526
	return 0;

err_probe:
1527
	soc_cleanup_codec_debugfs(codec);
1528 1529
	module_put(codec->dev->driver->owner);

1530 1531 1532
	return ret;
}

1533 1534
static void rtd_release(struct device *dev) {}

1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553
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;
	}
1554
	rtd->card = card;
1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 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

	/* 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;
}

1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635
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
1636 1637
	}

1638 1639
	/* probe the CODEC */
	if (!codec->probed) {
1640 1641 1642
		ret = soc_probe_codec(card, codec);
		if (ret < 0)
			return ret;
F
Frank Mandarino 已提交
1643 1644
	}

1645 1646
	/* probe the platform */
	if (!platform->probed) {
1647 1648 1649
		if (!try_module_get(platform->dev->driver->owner))
			return -ENODEV;

1650 1651 1652 1653 1654
		if (platform->driver->probe) {
			ret = platform->driver->probe(platform);
			if (ret < 0) {
				printk(KERN_ERR "asoc: failed to probe platform %s\n",
						platform->name);
1655
				module_put(platform->dev->driver->owner);
1656 1657 1658 1659 1660 1661 1662
				return ret;
			}
		}
		/* mark platform as probed and add to card platform list */
		platform->probed = 1;
		list_add(&platform->card_list, &card->platform_dev_list);
	}
1663

1664 1665 1666 1667
	/* 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
1668
			if (ret < 0) {
1669 1670 1671
				printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
						codec_dai->name);
				return ret;
M
Mark Brown 已提交
1672 1673
			}
		}
1674 1675 1676 1677

		/* 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
1678 1679
	}

1680 1681 1682
	/* DAPM dai link stream work */
	INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);

1683 1684
	ret = soc_post_component_init(card, codec, num, 0);
	if (ret)
1685
		return ret;
M
Mark Brown 已提交
1686

1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704
	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
1705
#ifdef CONFIG_SND_SOC_AC97_BUS
1706 1707 1708 1709
static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
{
	int ret;

M
Mark Brown 已提交
1710 1711 1712
	/* Only instantiate AC97 if not already done by the adaptor
	 * for the generic AC97 subsystem.
	 */
1713
	if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1714 1715 1716 1717 1718 1719 1720 1721 1722 1723
		/*
		 * 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;
1724 1725

		ret = soc_ac97_dev_register(rtd->codec);
M
Mark Brown 已提交
1726 1727
		if (ret < 0) {
			printk(KERN_ERR "asoc: AC97 device register failed\n");
1728
			return ret;
M
Mark Brown 已提交
1729
		}
1730 1731

		rtd->codec->ac97_registered = 1;
M
Mark Brown 已提交
1732
	}
1733 1734 1735 1736 1737 1738 1739 1740 1741 1742
	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
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1743 1744
#endif

1745 1746 1747 1748
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;
1749
	int ret = -ENODEV;
1750 1751 1752 1753 1754 1755 1756 1757 1758 1759

	/* 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;
			}
1760
			goto found;
1761 1762
		}
	}
1763 1764 1765
	/* codec not found */
	dev_err(card->dev, "asoc: codec %s not found", aux_dev->codec_name);
	goto out;
1766

1767
found:
1768
	ret = soc_probe_codec(card, codec);
1769
	if (ret < 0)
1770
		return ret;
1771

1772
	ret = soc_post_component_init(card, codec, num, 1);
1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784

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) {
1785
		device_remove_file(&rtd->dev, &dev_attr_codec_reg);
1786 1787 1788 1789
		device_unregister(&rtd->dev);
		rtd->dev_registered = 0;
	}

1790 1791
	if (codec && codec->probed)
		soc_remove_codec(codec);
1792 1793
}

1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814
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;
}

1815 1816
static void snd_soc_instantiate_card(struct snd_soc_card *card)
{
1817 1818 1819
	struct snd_soc_codec *codec;
	struct snd_soc_codec_conf *codec_conf;
	enum snd_soc_compress_type compress_type;
1820
	int ret, i;
M
Mark Brown 已提交
1821

1822
	mutex_lock(&card->mutex);
1823

1824 1825 1826 1827
	if (card->instantiated) {
		mutex_unlock(&card->mutex);
		return;
	}
M
Mark Brown 已提交
1828

1829 1830 1831
	/* bind DAIs */
	for (i = 0; i < card->num_links; i++)
		soc_bind_dai_link(card, i);
M
Mark Brown 已提交
1832

1833 1834 1835 1836 1837
	/* bind completed ? */
	if (card->num_rtd != card->num_links) {
		mutex_unlock(&card->mutex);
		return;
	}
1838

1839 1840 1841 1842
	/* initialize the register cache for each available codec */
	list_for_each_entry(codec, &codec_list, list) {
		if (codec->cache_init)
			continue;
1843 1844
		/* by default we don't override the compress_type */
		compress_type = 0;
1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861
		/* 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;
		}
	}

1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872
	/* 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
1873 1874 1875 1876 1877
	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);

1878 1879 1880 1881
#ifdef CONFIG_DEBUG_FS
	snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
#endif

1882
#ifdef CONFIG_PM_SLEEP
1883 1884 1885
	/* deferred resume work */
	INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
#endif
F
Frank Mandarino 已提交
1886

1887 1888 1889 1890
	if (card->dapm_widgets)
		snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
					  card->num_dapm_widgets);

1891 1892
	/* initialise the sound card only once */
	if (card->probe) {
1893
		ret = card->probe(card);
1894 1895 1896
		if (ret < 0)
			goto card_probe_error;
	}
M
Mark Brown 已提交
1897

1898 1899 1900
	for (i = 0; i < card->num_links; i++) {
		ret = soc_probe_dai_link(card, i);
		if (ret < 0) {
1901 1902
			pr_err("asoc: failed to instantiate card %s: %d\n",
			       card->name, ret);
1903 1904 1905
			goto probe_dai_err;
		}
	}
F
Frank Mandarino 已提交
1906

1907 1908 1909 1910 1911 1912 1913 1914 1915
	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;
		}
	}

1916 1917 1918 1919 1920 1921 1922 1923
	/* We should have a non-codec control add function but we don't */
	if (card->controls)
		snd_soc_add_controls(list_first_entry(&card->codec_dev_list,
						      struct snd_soc_codec,
						      card_list),
				     card->controls,
				     card->num_controls);

1924 1925 1926 1927
	if (card->dapm_routes)
		snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
					card->num_dapm_routes);

1928 1929 1930 1931 1932
	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);

1933 1934 1935 1936 1937 1938 1939 1940 1941
	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;
		}
	}

1942 1943 1944
	ret = snd_card_register(card->snd_card);
	if (ret < 0) {
		printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
1945
		goto probe_aux_dev_err;
F
Frank Mandarino 已提交
1946 1947
	}

1948 1949 1950
#ifdef CONFIG_SND_SOC_AC97_BUS
	/* register any AC97 codecs */
	for (i = 0; i < card->num_rtd; i++) {
1951 1952 1953 1954
		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
1955
				soc_unregister_ac97_dai_link(card->rtd[i].codec);
1956
			goto probe_aux_dev_err;
1957
		}
1958
	}
1959 1960 1961 1962 1963 1964
#endif

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

1965 1966 1967 1968
probe_aux_dev_err:
	for (i = 0; i < card->num_aux_devs; i++)
		soc_remove_aux_dev(card, i);

1969
probe_dai_err:
1970
	soc_remove_dai_links(card);
1971 1972

card_probe_error:
1973
	if (card->remove)
1974
		card->remove(card);
1975 1976 1977 1978

	snd_card_free(card->snd_card);

	mutex_unlock(&card->mutex);
1979
}
F
Frank Mandarino 已提交
1980

1981
/*
1982
 * Attempt to initialise any uninitialised cards.  Must be called with
1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994
 * 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)
{
1995
	struct snd_soc_card *card = platform_get_drvdata(pdev);
1996 1997
	int ret = 0;

1998 1999 2000 2001 2002 2003 2004
	/*
	 * no card, so machine driver should be registering card
	 * we should not be here in that case so ret error
	 */
	if (!card)
		return -EINVAL;

2005 2006
	/* Bodge while we unpick instantiation */
	card->dev = &pdev->dev;
2007

2008 2009 2010 2011 2012 2013 2014
	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
2015 2016
}

2017
static int soc_cleanup_card_resources(struct snd_soc_card *card)
F
Frank Mandarino 已提交
2018 2019 2020
{
	int i;

2021 2022 2023 2024 2025
	/* 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);
	}
2026

2027 2028 2029
	/* remove auxiliary devices */
	for (i = 0; i < card->num_aux_devs; i++)
		soc_remove_aux_dev(card, i);
F
Frank Mandarino 已提交
2030

2031
	/* remove and free each DAI */
2032
	soc_remove_dai_links(card);
2033

2034
	soc_cleanup_card_debugfs(card);
2035

2036 2037
	/* remove the card */
	if (card->remove)
2038
		card->remove(card);
2039

2040 2041
	snd_soc_dapm_free(&card->dapm);

2042 2043 2044 2045 2046 2047 2048 2049 2050 2051
	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
2052

M
Mark Brown 已提交
2053
	snd_soc_unregister_card(card);
F
Frank Mandarino 已提交
2054 2055 2056
	return 0;
}

2057
int snd_soc_poweroff(struct device *dev)
M
Mark Brown 已提交
2058
{
2059
	struct snd_soc_card *card = dev_get_drvdata(dev);
2060
	int i;
M
Mark Brown 已提交
2061 2062

	if (!card->instantiated)
M
Mark Brown 已提交
2063
		return 0;
M
Mark Brown 已提交
2064 2065 2066

	/* Flush out pmdown_time work - we actually do want to run it
	 * now, we're shutting down so no imminent restart. */
2067 2068
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
2069
		flush_delayed_work_sync(&rtd->delayed_work);
2070
	}
M
Mark Brown 已提交
2071

2072
	snd_soc_dapm_shutdown(card);
M
Mark Brown 已提交
2073 2074

	return 0;
M
Mark Brown 已提交
2075
}
2076
EXPORT_SYMBOL_GPL(snd_soc_poweroff);
M
Mark Brown 已提交
2077

2078 2079 2080 2081
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
2082
};
2083
EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
M
Mark Brown 已提交
2084

F
Frank Mandarino 已提交
2085 2086 2087 2088
/* ASoC platform driver */
static struct platform_driver soc_driver = {
	.driver		= {
		.name		= "soc-audio",
2089
		.owner		= THIS_MODULE,
2090
		.pm		= &snd_soc_pm_ops,
F
Frank Mandarino 已提交
2091 2092 2093 2094 2095 2096
	},
	.probe		= soc_probe,
	.remove		= soc_remove,
};

/* create a new pcm */
2097 2098 2099 2100 2101 2102
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
2103 2104 2105 2106 2107
	struct snd_pcm *pcm;
	char new_name[64];
	int ret = 0, playback = 0, capture = 0;

	/* check client and interface hw capabilities */
2108
	snprintf(new_name, sizeof(new_name), "%s %s-%d",
2109
			rtd->dai_link->stream_name, codec_dai->name, num);
F
Frank Mandarino 已提交
2110

2111
	if (codec_dai->driver->playback.channels_min)
F
Frank Mandarino 已提交
2112
		playback = 1;
2113
	if (codec_dai->driver->capture.channels_min)
F
Frank Mandarino 已提交
2114 2115
		capture = 1;

2116 2117 2118
	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
2119
	if (ret < 0) {
2120
		printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
F
Frank Mandarino 已提交
2121 2122 2123
		return ret;
	}

2124
	rtd->pcm = pcm;
F
Frank Mandarino 已提交
2125
	pcm->private_data = rtd;
2126 2127 2128 2129 2130 2131 2132 2133 2134
	if (platform->driver->ops) {
		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
2135 2136 2137 2138 2139 2140 2141

	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);

2142 2143 2144 2145 2146 2147 2148
	if (platform->driver->pcm_new) {
		ret = platform->driver->pcm_new(rtd->card->snd_card,
						codec_dai, pcm);
		if (ret < 0) {
			pr_err("asoc: platform pcm constructor failed\n");
			return ret;
		}
F
Frank Mandarino 已提交
2149 2150
	}

2151
	pcm->private_free = platform->driver->pcm_free;
F
Frank Mandarino 已提交
2152 2153 2154 2155 2156
	printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
		cpu_dai->name);
	return ret;
}

2157 2158 2159 2160 2161 2162 2163 2164
/**
 * 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.
 */
2165 2166
int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
				    unsigned int reg)
2167
{
2168 2169
	if (codec->volatile_register)
		return codec->volatile_register(codec, reg);
2170 2171 2172 2173 2174
	else
		return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);

2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210
/**
 * snd_soc_codec_readable_register: Report if a register is readable.
 *
 * @codec: CODEC to query.
 * @reg: Register to query.
 *
 * Boolean function indicating if a CODEC register is readable.
 */
int snd_soc_codec_readable_register(struct snd_soc_codec *codec,
				    unsigned int reg)
{
	if (codec->readable_register)
		return codec->readable_register(codec, reg);
	else
		return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_readable_register);

/**
 * snd_soc_codec_writable_register: Report if a register is writable.
 *
 * @codec: CODEC to query.
 * @reg: Register to query.
 *
 * Boolean function indicating if a CODEC register is writable.
 */
int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
				    unsigned int reg)
{
	if (codec->writable_register)
		return codec->writable_register(codec, reg);
	else
		return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);

F
Frank Mandarino 已提交
2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239
/**
 * 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;
2240 2241 2242 2243 2244 2245 2246

	/*
	 * 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
2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260
	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);
2261 2262 2263
#ifdef CONFIG_SND_SOC_AC97_BUS
	soc_unregister_ac97_dai_link(codec);
#endif
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	kfree(codec->ac97->bus);
	kfree(codec->ac97);
	codec->ac97 = NULL;
2267
	codec->ac97_created = 0;
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	mutex_unlock(&codec->mutex);
}
EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);

2272 2273 2274 2275
unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
{
	unsigned int ret;

2276
	ret = codec->read(codec, reg);
2277
	dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2278
	trace_snd_soc_reg_read(codec, reg, ret);
2279 2280 2281 2282 2283 2284 2285 2286 2287

	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);
2288
	trace_snd_soc_reg_write(codec, reg, val);
2289
	return codec->write(codec, reg, val);
2290 2291 2292
}
EXPORT_SYMBOL_GPL(snd_soc_write);

2293 2294 2295 2296 2297 2298 2299
unsigned int snd_soc_bulk_write_raw(struct snd_soc_codec *codec,
				    unsigned int reg, const void *data, size_t len)
{
	return codec->bulk_write_raw(codec, reg, data, len);
}
EXPORT_SYMBOL_GPL(snd_soc_bulk_write_raw);

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/**
 * snd_soc_update_bits - update codec register bits
 * @codec: audio codec
 * @reg: codec register
 * @mask: register mask
 * @value: new value
 *
 * Writes new register value.
 *
2309
 * Returns 1 for change, 0 for no change, or negative error code.
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 */
int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2312
				unsigned int mask, unsigned int value)
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{
	int change;
2315
	unsigned int old, new;
2316 2317 2318 2319 2320
	int ret;

	ret = snd_soc_read(codec, reg);
	if (ret < 0)
		return ret;
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2322
	old = ret;
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	new = (old & ~mask) | value;
	change = old != new;
2325 2326 2327 2328 2329
	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);

2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345
/**
 * 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.
 */
2346 2347 2348
int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
			       unsigned short reg, unsigned int mask,
			       unsigned int value)
2349 2350 2351 2352 2353 2354 2355 2356 2357
{
	int change;

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

	return change;
}
2358
EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2359

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/**
 * 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,
2373
				unsigned int mask, unsigned int value)
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{
	int change;
2376
	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
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 * @long_name: control long name
2414
 * @prefix: control name prefix
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 *
 * 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,
2421 2422
				  void *data, char *long_name,
				  const char *prefix)
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{
	struct snd_kcontrol_new template;
2425 2426 2427
	struct snd_kcontrol *kcontrol;
	char *name = NULL;
	int name_len;
F
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	memcpy(&template, _template, sizeof(template));
	template.index = 0;

2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452
	if (!long_name)
		long_name = template.name;

	if (prefix) {
		name_len = strlen(long_name) + strlen(prefix) + 2;
		name = kmalloc(name_len, GFP_ATOMIC);
		if (!name)
			return NULL;

		snprintf(name, name_len, "%s %s", prefix, long_name);

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

	kcontrol = snd_ctl_new1(&template, data);

	kfree(name);

	return kcontrol;
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}
EXPORT_SYMBOL_GPL(snd_soc_cnew);

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/**
 * 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)
{
2470
	struct snd_card *card = codec->card->snd_card;
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	int err, i;

	for (i = 0; i < num_controls; i++) {
		const struct snd_kcontrol_new *control = &controls[i];
2475 2476 2477
		err = snd_ctl_add(card, snd_soc_cnew(control, codec,
						     control->name,
						     codec->name_prefix));
I
Ian Molton 已提交
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		if (err < 0) {
2479
			dev_err(codec->dev, "%s: Failed to add %s: %d\n",
2480
				codec->name, control->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;
2506
	uinfo->value.enumerated.items = e->max;
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2508 2509
	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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 * @ucontrol: control element information
F
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2520 2521 2522 2523 2524 2525 2526 2527 2528 2529
 *
 * 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;
2530
	unsigned int val, bitmask;
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2531

2532
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
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2533 2534
		;
	val = snd_soc_read(codec, e->reg);
2535 2536
	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
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 * @ucontrol: control element information
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 *
 * 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;
2559 2560
	unsigned int val;
	unsigned int mask, bitmask;
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2562
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
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2563
		;
2564
	if (ucontrol->value.enumerated.item[0] > e->max - 1)
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		return -EINVAL;
	val = ucontrol->value.enumerated.item[0] << e->shift_l;
	mask = (bitmask - 1) << e->shift_l;
	if (e->shift_l != e->shift_r) {
2569
		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;
	}

2575
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
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}
EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);

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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);
2595
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2596
	unsigned int reg_val, val, mux;
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2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633

	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);
2634
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2635 2636
	unsigned int val;
	unsigned int mask;
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Peter Ujfalusi 已提交
2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648

	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;
	}

2649
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
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2650 2651 2652
}
EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);

F
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2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669
/**
 * 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;
2670
	uinfo->value.enumerated.items = e->max;
F
Frank Mandarino 已提交
2671

2672 2673
	if (uinfo->value.enumerated.item > e->max - 1)
		uinfo->value.enumerated.item = e->max - 1;
F
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2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691
	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
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2692 2693
	int max = kcontrol->private_value;

2694
	if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
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2695 2696 2697
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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2698 2699 2700

	uinfo->count = 1;
	uinfo->value.integer.min = 0;
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2701
	uinfo->value.integer.max = max;
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2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717
	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)
{
2718 2719
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2720
	int platform_max;
2721
	unsigned int shift = mc->shift;
2722
	unsigned int rshift = mc->rshift;
F
Frank Mandarino 已提交
2723

2724 2725 2726 2727 2728
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

	if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
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2729 2730 2731 2732
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;

F
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2733 2734
	uinfo->count = shift == rshift ? 1 : 2;
	uinfo->value.integer.min = 0;
2735
	uinfo->value.integer.max = platform_max;
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	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw);

/**
 * snd_soc_get_volsw - single mixer get callback
 * @kcontrol: mixer control
M
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 * @ucontrol: control element information
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2744 2745 2746 2747 2748 2749 2750 2751
 *
 * 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)
{
2752 2753
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
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2754
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2755 2756 2757
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
2758
	int max = mc->max;
2759 2760
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
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	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] =
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2769
			max - ucontrol->value.integer.value[0];
F
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		if (shift != rshift)
			ucontrol->value.integer.value[1] =
P
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2772
				max - ucontrol->value.integer.value[1];
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	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw);

/**
 * snd_soc_put_volsw - single mixer put callback
 * @kcontrol: mixer control
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 * @ucontrol: control element information
F
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2783 2784 2785 2786 2787 2788 2789 2790
 *
 * 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)
{
2791 2792
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
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2793
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2794 2795 2796
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
2797
	int max = mc->max;
2798 2799
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
2800
	unsigned int val, val2, val_mask;
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Frank Mandarino 已提交
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	val = (ucontrol->value.integer.value[0] & mask);
	if (invert)
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2804
		val = max - val;
F
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	val_mask = mask << shift;
	val = val << shift;
	if (shift != rshift) {
		val2 = (ucontrol->value.integer.value[1] & mask);
		if (invert)
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			val2 = max - val2;
F
Frank Mandarino 已提交
2811 2812 2813
		val_mask |= mask << rshift;
		val |= val2 << rshift;
	}
2814
	return snd_soc_update_bits_locked(codec, reg, val_mask, val);
F
Frank Mandarino 已提交
2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830
}
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)
{
2831 2832
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2833
	int platform_max;
P
Philipp Zabel 已提交
2834

2835 2836 2837 2838 2839
	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
2840 2841 2842
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
F
Frank Mandarino 已提交
2843 2844 2845

	uinfo->count = 2;
	uinfo->value.integer.min = 0;
2846
	uinfo->value.integer.max = platform_max;
F
Frank Mandarino 已提交
2847 2848 2849 2850 2851 2852 2853
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);

/**
 * snd_soc_get_volsw_2r - double mixer get callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2854
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2855 2856 2857 2858 2859 2860 2861 2862
 *
 * 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)
{
2863 2864
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2865
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2866 2867 2868
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
2869
	int max = mc->max;
2870
	unsigned int mask = (1 << fls(max)) - 1;
2871
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2872 2873 2874 2875 2876 2877 2878

	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
2879
			max - ucontrol->value.integer.value[0];
F
Frank Mandarino 已提交
2880
		ucontrol->value.integer.value[1] =
P
Philipp Zabel 已提交
2881
			max - ucontrol->value.integer.value[1];
F
Frank Mandarino 已提交
2882 2883 2884 2885 2886 2887 2888 2889 2890
	}

	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
2891
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2892 2893 2894 2895 2896 2897 2898 2899
 *
 * 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)
{
2900 2901
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2902
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2903 2904 2905
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
2906
	int max = mc->max;
2907 2908
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2909
	int err;
2910
	unsigned int val, val2, val_mask;
F
Frank Mandarino 已提交
2911 2912 2913 2914 2915 2916

	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
2917 2918
		val = max - val;
		val2 = max - val2;
F
Frank Mandarino 已提交
2919 2920 2921 2922 2923
	}

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

2924
	err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2925
	if (err < 0)
F
Frank Mandarino 已提交
2926 2927
		return err;

2928
	err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
F
Frank Mandarino 已提交
2929 2930 2931 2932
	return err;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);

2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944
/**
 * 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)
{
2945 2946
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2947
	int platform_max;
2948
	int min = mc->min;
2949

2950 2951 2952 2953
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

2954 2955 2956
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
2957
	uinfo->value.integer.max = platform_max - min;
2958 2959 2960 2961 2962 2963 2964
	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
2965
 * @ucontrol: control element information
2966 2967 2968 2969 2970 2971 2972 2973
 *
 * 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)
{
2974 2975
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2976
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2977
	unsigned int reg = mc->reg;
2978
	int min = mc->min;
2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991
	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
2992
 * @ucontrol: control element information
2993 2994 2995 2996 2997 2998 2999 3000
 *
 * 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)
{
3001 3002
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
3003
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3004
	unsigned int reg = mc->reg;
3005
	int min = mc->min;
3006
	unsigned int val;
3007 3008 3009 3010

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

3011
	return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
3012 3013 3014
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);

3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026
/**
 * 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)
{
3027
	struct snd_card *card = codec->card->snd_card;
3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045
	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) {
3046
			mc->platform_max = max;
3047 3048 3049 3050 3051 3052 3053
			ret = 0;
		}
	}
	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_limit_volume);

3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097
/**
 * 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;

3098 3099
	ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
	ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134
	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)
3135
			return ret;
3136 3137 3138 3139
	}
	if (ovalr != valr) {
		ret = snd_soc_write(codec, mc->rreg, valr);
		if (ret < 0)
3140
			return ret;
3141 3142 3143 3144 3145 3146
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);

3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158
/**
 * 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)
{
3159 3160
	if (dai->driver && dai->driver->ops->set_sysclk)
		return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3161 3162 3163
	else if (dai->codec && dai->codec->driver->set_sysclk)
		return dai->codec->driver->set_sysclk(dai->codec, clk_id,
						      freq, dir);
3164 3165 3166 3167 3168
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);

3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187
/**
 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
 * @codec: CODEC
 * @clk_id: DAI specific clock ID
 * @freq: new clock frequency in Hz
 * @dir: new clock direction - input/output.
 *
 * Configures the CODEC master (MCLK) or system (SYSCLK) clocking.
 */
int snd_soc_codec_set_sysclk(struct snd_soc_codec *codec, int clk_id,
	unsigned int freq, int dir)
{
	if (codec->driver->set_sysclk)
		return codec->driver->set_sysclk(codec, clk_id, freq, dir);
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);

3188 3189 3190
/**
 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
 * @dai: DAI
M
Mark Brown 已提交
3191
 * @div_id: DAI specific clock divider ID
3192 3193 3194 3195 3196 3197 3198 3199 3200
 * @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)
{
3201 3202
	if (dai->driver && dai->driver->ops->set_clkdiv)
		return dai->driver->ops->set_clkdiv(dai, div_id, div);
3203 3204 3205 3206 3207 3208 3209 3210 3211
	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
3212
 * @source: DAI specific source for the PLL
3213 3214 3215 3216 3217
 * @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.
 */
3218 3219
int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
	unsigned int freq_in, unsigned int freq_out)
3220
{
3221 3222
	if (dai->driver && dai->driver->ops->set_pll)
		return dai->driver->ops->set_pll(dai, pll_id, source,
3223
					 freq_in, freq_out);
3224 3225 3226
	else if (dai->codec && dai->codec->driver->set_pll)
		return dai->codec->driver->set_pll(dai->codec, pll_id, source,
						   freq_in, freq_out);
3227 3228 3229 3230 3231
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);

3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252
/*
 * snd_soc_codec_set_pll - configure codec PLL.
 * @codec: CODEC
 * @pll_id: DAI specific PLL ID
 * @source: DAI specific source for the PLL
 * @freq_in: PLL input clock frequency in Hz
 * @freq_out: requested PLL output clock frequency in Hz
 *
 * Configures and enables PLL to generate output clock based on input clock.
 */
int snd_soc_codec_set_pll(struct snd_soc_codec *codec, int pll_id, int source,
			  unsigned int freq_in, unsigned int freq_out)
{
	if (codec->driver->set_pll)
		return codec->driver->set_pll(codec, pll_id, source,
					      freq_in, freq_out);
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_set_pll);

3253 3254 3255 3256 3257 3258 3259 3260 3261
/**
 * 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)
{
3262 3263
	if (dai->driver && dai->driver->ops->set_fmt)
		return dai->driver->ops->set_fmt(dai, fmt);
3264 3265 3266 3267 3268 3269 3270 3271
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);

/**
 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
 * @dai: DAI
3272 3273
 * @tx_mask: bitmask representing active TX slots.
 * @rx_mask: bitmask representing active RX slots.
3274
 * @slots: Number of slots in use.
3275
 * @slot_width: Width in bits for each slot.
3276 3277 3278 3279 3280
 *
 * 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,
3281
	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3282
{
3283 3284
	if (dai->driver && dai->driver->ops->set_tdm_slot)
		return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3285
				slots, slot_width);
3286 3287 3288 3289 3290
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);

3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306
/**
 * 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)
{
3307 3308
	if (dai->driver && dai->driver->ops->set_channel_map)
		return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3309 3310 3311 3312 3313 3314
			rx_num, rx_slot);
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);

3315 3316 3317 3318 3319 3320 3321 3322 3323
/**
 * 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)
{
3324 3325
	if (dai->driver && dai->driver->ops->set_tristate)
		return dai->driver->ops->set_tristate(dai, tristate);
3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339
	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)
{
3340 3341
	if (dai->driver && dai->driver->ops->digital_mute)
		return dai->driver->ops->digital_mute(dai, mute);
3342 3343 3344 3345 3346
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);

M
Mark Brown 已提交
3347 3348 3349
/**
 * snd_soc_register_card - Register a card with the ASoC core
 *
M
Mark Brown 已提交
3350
 * @card: Card to register
M
Mark Brown 已提交
3351 3352
 *
 */
3353
int snd_soc_register_card(struct snd_soc_card *card)
M
Mark Brown 已提交
3354
{
3355 3356
	int i;

M
Mark Brown 已提交
3357 3358 3359
	if (!card->name || !card->dev)
		return -EINVAL;

M
Mark Brown 已提交
3360 3361
	dev_set_drvdata(card->dev, card);

3362 3363
	snd_soc_initialize_card_lists(card);

3364 3365
	soc_init_card_debugfs(card);

3366 3367 3368
	card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) *
			    (card->num_links + card->num_aux_devs),
			    GFP_KERNEL);
3369 3370
	if (card->rtd == NULL)
		return -ENOMEM;
3371
	card->rtd_aux = &card->rtd[card->num_links];
3372 3373 3374 3375

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

M
Mark Brown 已提交
3376 3377
	INIT_LIST_HEAD(&card->list);
	card->instantiated = 0;
3378
	mutex_init(&card->mutex);
M
Mark Brown 已提交
3379 3380 3381

	mutex_lock(&client_mutex);
	list_add(&card->list, &card_list);
3382
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
3383 3384 3385 3386 3387 3388
	mutex_unlock(&client_mutex);

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

	return 0;
}
3389
EXPORT_SYMBOL_GPL(snd_soc_register_card);
M
Mark Brown 已提交
3390 3391 3392 3393

/**
 * snd_soc_unregister_card - Unregister a card with the ASoC core
 *
M
Mark Brown 已提交
3394
 * @card: Card to unregister
M
Mark Brown 已提交
3395 3396
 *
 */
3397
int snd_soc_unregister_card(struct snd_soc_card *card)
M
Mark Brown 已提交
3398
{
3399 3400
	if (card->instantiated)
		soc_cleanup_card_resources(card);
M
Mark Brown 已提交
3401 3402 3403 3404 3405 3406 3407
	mutex_lock(&client_mutex);
	list_del(&card->list);
	mutex_unlock(&client_mutex);
	dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);

	return 0;
}
3408
EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
M
Mark Brown 已提交
3409

3410 3411 3412 3413
/*
 * Simplify DAI link configuration by removing ".-1" from device names
 * and sanitizing names.
 */
3414
static char *fmt_single_name(struct device *dev, int *id)
3415 3416 3417 3418 3419 3420 3421
{
	char *found, name[NAME_SIZE];
	int id1, id2;

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

3422
	strlcpy(name, dev_name(dev), NAME_SIZE);
3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440

	/* 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 */
3441
			*id = ((id1 & 0xffff) << 16) + id2;
3442 3443 3444

			/* sanitize component name for DAI link creation */
			snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3445
			strlcpy(name, tmp, NAME_SIZE);
3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468
		} 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
3469 3470 3471
/**
 * snd_soc_register_dai - Register a DAI with the ASoC core
 *
M
Mark Brown 已提交
3472
 * @dai: DAI to register
M
Mark Brown 已提交
3473
 */
3474 3475
int snd_soc_register_dai(struct device *dev,
		struct snd_soc_dai_driver *dai_drv)
M
Mark Brown 已提交
3476
{
3477 3478 3479
	struct snd_soc_dai *dai;

	dev_dbg(dev, "dai register %s\n", dev_name(dev));
M
Mark Brown 已提交
3480

3481 3482
	dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
	if (dai == NULL)
L
Lu Guanqun 已提交
3483
		return -ENOMEM;
M
Mark Brown 已提交
3484

3485 3486 3487 3488 3489 3490
	/* create DAI component name */
	dai->name = fmt_single_name(dev, &dai->id);
	if (dai->name == NULL) {
		kfree(dai);
		return -ENOMEM;
	}
3491

3492 3493 3494 3495
	dai->dev = dev;
	dai->driver = dai_drv;
	if (!dai->driver->ops)
		dai->driver->ops = &null_dai_ops;
M
Mark Brown 已提交
3496 3497 3498

	mutex_lock(&client_mutex);
	list_add(&dai->list, &dai_list);
3499
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510
	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
3511
 * @dai: DAI to unregister
M
Mark Brown 已提交
3512
 */
3513
void snd_soc_unregister_dai(struct device *dev)
M
Mark Brown 已提交
3514
{
3515 3516 3517 3518 3519 3520 3521 3522 3523
	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
3524 3525 3526 3527 3528
	mutex_lock(&client_mutex);
	list_del(&dai->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered DAI '%s'\n", dai->name);
3529 3530
	kfree(dai->name);
	kfree(dai);
M
Mark Brown 已提交
3531 3532 3533 3534 3535 3536
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);

/**
 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
 *
M
Mark Brown 已提交
3537 3538
 * @dai: Array of DAIs to register
 * @count: Number of DAIs
M
Mark Brown 已提交
3539
 */
3540 3541
int snd_soc_register_dais(struct device *dev,
		struct snd_soc_dai_driver *dai_drv, size_t count)
M
Mark Brown 已提交
3542
{
3543 3544 3545
	struct snd_soc_dai *dai;
	int i, ret = 0;

3546
	dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
M
Mark Brown 已提交
3547 3548

	for (i = 0; i < count; i++) {
3549 3550

		dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3551 3552 3553 3554
		if (dai == NULL) {
			ret = -ENOMEM;
			goto err;
		}
3555 3556 3557 3558 3559 3560

		/* 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
3561
			goto err;
3562 3563 3564 3565
		}

		dai->dev = dev;
		dai->driver = &dai_drv[i];
3566 3567 3568 3569
		if (dai->driver->id)
			dai->id = dai->driver->id;
		else
			dai->id = i;
3570 3571 3572 3573 3574 3575 3576 3577
		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
3578 3579
	}

3580
	mutex_lock(&client_mutex);
3581
	snd_soc_instantiate_cards();
3582
	mutex_unlock(&client_mutex);
M
Mark Brown 已提交
3583 3584 3585 3586
	return 0;

err:
	for (i--; i >= 0; i--)
3587
		snd_soc_unregister_dai(dev);
M
Mark Brown 已提交
3588 3589 3590 3591 3592 3593 3594 3595

	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
3596 3597
 * @dai: Array of DAIs to unregister
 * @count: Number of DAIs
M
Mark Brown 已提交
3598
 */
3599
void snd_soc_unregister_dais(struct device *dev, size_t count)
M
Mark Brown 已提交
3600 3601 3602 3603
{
	int i;

	for (i = 0; i < count; i++)
3604
		snd_soc_unregister_dai(dev);
M
Mark Brown 已提交
3605 3606 3607
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);

M
Mark Brown 已提交
3608 3609 3610
/**
 * snd_soc_register_platform - Register a platform with the ASoC core
 *
M
Mark Brown 已提交
3611
 * @platform: platform to register
M
Mark Brown 已提交
3612
 */
3613 3614
int snd_soc_register_platform(struct device *dev,
		struct snd_soc_platform_driver *platform_drv)
M
Mark Brown 已提交
3615
{
3616 3617 3618 3619 3620 3621
	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)
L
Lu Guanqun 已提交
3622
		return -ENOMEM;
3623 3624 3625 3626 3627 3628 3629

	/* 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
3630

3631 3632
	platform->dev = dev;
	platform->driver = platform_drv;
M
Mark Brown 已提交
3633 3634 3635

	mutex_lock(&client_mutex);
	list_add(&platform->list, &platform_list);
3636
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647
	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
3648
 * @platform: platform to unregister
M
Mark Brown 已提交
3649
 */
3650
void snd_soc_unregister_platform(struct device *dev)
M
Mark Brown 已提交
3651
{
3652 3653 3654 3655 3656 3657 3658 3659 3660
	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
3661 3662 3663 3664 3665
	mutex_lock(&client_mutex);
	list_del(&platform->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered platform '%s'\n", platform->name);
3666 3667
	kfree(platform->name);
	kfree(platform);
M
Mark Brown 已提交
3668 3669 3670
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);

3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703
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
3704 3705 3706
/**
 * snd_soc_register_codec - Register a codec with the ASoC core
 *
M
Mark Brown 已提交
3707
 * @codec: codec to register
M
Mark Brown 已提交
3708
 */
3709
int snd_soc_register_codec(struct device *dev,
3710 3711 3712
			   const struct snd_soc_codec_driver *codec_drv,
			   struct snd_soc_dai_driver *dai_drv,
			   int num_dai)
M
Mark Brown 已提交
3713
{
3714
	size_t reg_size;
3715 3716
	struct snd_soc_codec *codec;
	int ret, i;
3717

3718 3719 3720 3721 3722
	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
3723

3724 3725 3726 3727 3728 3729 3730
	/* create CODEC component name */
	codec->name = fmt_single_name(dev, &codec->id);
	if (codec->name == NULL) {
		kfree(codec);
		return -ENOMEM;
	}

3731 3732 3733 3734 3735
	if (codec_drv->compress_type)
		codec->compress_type = codec_drv->compress_type;
	else
		codec->compress_type = SND_SOC_FLAT_COMPRESSION;

3736 3737
	codec->write = codec_drv->write;
	codec->read = codec_drv->read;
3738 3739
	codec->volatile_register = codec_drv->volatile_register;
	codec->readable_register = codec_drv->readable_register;
3740
	codec->writable_register = codec_drv->writable_register;
L
Liam Girdwood 已提交
3741 3742 3743
	codec->dapm.bias_level = SND_SOC_BIAS_OFF;
	codec->dapm.dev = dev;
	codec->dapm.codec = codec;
3744
	codec->dapm.seq_notifier = codec_drv->seq_notifier;
3745 3746 3747 3748
	codec->dev = dev;
	codec->driver = codec_drv;
	codec->num_dai = num_dai;
	mutex_init(&codec->mutex);
L
Liam Girdwood 已提交
3749

3750 3751
	/* allocate CODEC register cache */
	if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3752
		reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
3753
		codec->reg_size = reg_size;
3754 3755 3756 3757 3758 3759
		/* 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.
		 */
3760 3761 3762 3763 3764 3765 3766
		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;
			}
3767
		}
3768 3769
	}

3770 3771 3772 3773 3774
	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;
3775 3776
		if (!codec->writable_register)
			codec->writable_register = snd_soc_default_writable_register;
3777 3778
	}

3779 3780 3781 3782 3783
	for (i = 0; i < num_dai; i++) {
		fixup_codec_formats(&dai_drv[i].playback);
		fixup_codec_formats(&dai_drv[i].capture);
	}

3784 3785 3786 3787
	/* register any DAIs */
	if (num_dai) {
		ret = snd_soc_register_dais(dev, dai_drv, num_dai);
		if (ret < 0)
3788
			goto fail;
3789
	}
3790

M
Mark Brown 已提交
3791 3792 3793 3794 3795 3796 3797
	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;
3798

3799
fail:
3800 3801
	kfree(codec->reg_def_copy);
	codec->reg_def_copy = NULL;
3802 3803 3804
	kfree(codec->name);
	kfree(codec);
	return ret;
M
Mark Brown 已提交
3805 3806 3807 3808 3809 3810
}
EXPORT_SYMBOL_GPL(snd_soc_register_codec);

/**
 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
 *
M
Mark Brown 已提交
3811
 * @codec: codec to unregister
M
Mark Brown 已提交
3812
 */
3813
void snd_soc_unregister_codec(struct device *dev)
M
Mark Brown 已提交
3814
{
3815 3816 3817 3818 3819 3820 3821 3822 3823 3824
	struct snd_soc_codec *codec;
	int i;

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

found:
3825 3826 3827
	if (codec->num_dai)
		for (i = 0; i < codec->num_dai; i++)
			snd_soc_unregister_dai(dev);
3828

M
Mark Brown 已提交
3829 3830 3831 3832 3833
	mutex_lock(&client_mutex);
	list_del(&codec->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered codec '%s'\n", codec->name);
3834

3835
	snd_soc_cache_exit(codec);
3836
	kfree(codec->reg_def_copy);
3837
	kfree(codec->name);
3838
	kfree(codec);
M
Mark Brown 已提交
3839 3840 3841
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);

3842
static int __init snd_soc_init(void)
F
Frank Mandarino 已提交
3843
{
3844
#ifdef CONFIG_DEBUG_FS
3845 3846
	snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
	if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
3847 3848
		printk(KERN_WARNING
		       "ASoC: Failed to create debugfs directory\n");
3849
		snd_soc_debugfs_root = NULL;
3850
	}
3851

3852
	if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
3853 3854 3855
				 &codec_list_fops))
		pr_warn("ASoC: Failed to create CODEC list debugfs file\n");

3856
	if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
M
Mark Brown 已提交
3857 3858
				 &dai_list_fops))
		pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3859

3860
	if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
3861 3862
				 &platform_list_fops))
		pr_warn("ASoC: Failed to create platform list debugfs file\n");
3863 3864
#endif

3865 3866
	snd_soc_util_init();

F
Frank Mandarino 已提交
3867 3868
	return platform_driver_register(&soc_driver);
}
3869
module_init(snd_soc_init);
F
Frank Mandarino 已提交
3870

M
Mark Brown 已提交
3871
static void __exit snd_soc_exit(void)
F
Frank Mandarino 已提交
3872
{
3873 3874
	snd_soc_util_exit();

3875
#ifdef CONFIG_DEBUG_FS
3876
	debugfs_remove_recursive(snd_soc_debugfs_root);
3877
#endif
3878
	platform_driver_unregister(&soc_driver);
F
Frank Mandarino 已提交
3879 3880 3881 3882
}
module_exit(snd_soc_exit);

/* Module information */
3883
MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
F
Frank Mandarino 已提交
3884 3885
MODULE_DESCRIPTION("ALSA SoC Core");
MODULE_LICENSE("GPL");
3886
MODULE_ALIAS("platform:soc-audio");