soc-core.c 119.1 KB
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/*
 * soc-core.c  --  ALSA SoC Audio Layer
 *
 * Copyright 2005 Wolfson Microelectronics PLC.
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 * Copyright 2005 Openedhand Ltd.
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 * Copyright (C) 2010 Slimlogic Ltd.
 * Copyright (C) 2010 Texas Instruments Inc.
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 *
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 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
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 *         with code, comments and ideas from :-
 *         Richard Purdie <richard@openedhand.com>
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 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  TODO:
 *   o Add hw rules to enforce rates, etc.
 *   o More testing with other codecs/machines.
 *   o Add more codecs and platforms to ensure good API coverage.
 *   o Support TDM on PCM and I2S
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/bitops.h>
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#include <linux/debugfs.h>
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#include <linux/platform_device.h>
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#include <linux/pinctrl/consumer.h>
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#include <linux/ctype.h>
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#include <linux/slab.h>
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#include <linux/of.h>
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#include <linux/gpio.h>
#include <linux/of_gpio.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>
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#include <sound/soc-dpcm.h>
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#include <sound/initval.h>

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

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#define NAME_SIZE	32

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

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

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struct snd_ac97_reset_cfg {
	struct pinctrl *pctl;
	struct pinctrl_state *pstate_reset;
	struct pinctrl_state *pstate_warm_reset;
	struct pinctrl_state *pstate_run;
	int gpio_sdata;
	int gpio_sync;
	int gpio_reset;
};

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

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

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/* fill buf which is 'len' bytes with a formatted
 * string of the form 'reg: value\n' */
static int format_register_str(struct snd_soc_codec *codec,
			       unsigned int reg, char *buf, size_t len)
{
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	int wordsize = min_bytes_needed(codec->driver->reg_cache_size) * 2;
	int regsize = codec->driver->reg_word_size * 2;
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	int ret;
	char tmpbuf[len + 1];
	char regbuf[regsize + 1];

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

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

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

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

	return 0;
}

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

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

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	if (codec->driver->reg_cache_step)
		step = codec->driver->reg_cache_step;
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	for (i = 0; i < codec->driver->reg_cache_size; i += step) {
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		if (!snd_soc_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 = dev_get_drvdata(dev);
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	return soc_codec_reg_show(rtd->codec, buf, PAGE_SIZE, 0);
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}

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

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

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

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

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

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

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

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	kfree(buf);
	return ret;
}

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

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

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

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) {
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		dev_warn(codec->dev,
			"ASoC: Failed to create codec debugfs directory\n");
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		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)
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		dev_warn(codec->dev,
			"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 void soc_init_platform_debugfs(struct snd_soc_platform *platform)
{
	struct dentry *debugfs_card_root = platform->card->debugfs_card_root;

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

	snd_soc_dapm_debugfs_init(&platform->dapm,
		platform->debugfs_platform_root);
}

static void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
{
	debugfs_remove_recursive(platform->debugfs_platform_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,
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			 "ASoC: Failed to create card debugfs directory\n");
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		return;
	}

	card->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0644,
						    card->debugfs_card_root,
						    &card->pop_time);
	if (!card->debugfs_pop_time)
		dev_warn(card->dev,
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		       "ASoC: Failed to create pop time debugfs file\n");
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}

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

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#else

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_platform_debugfs(struct snd_soc_platform *platform)
{
}

static inline void soc_cleanup_platform_debugfs(struct snd_soc_platform *platform)
{
}

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

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

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struct snd_pcm_substream *snd_soc_get_dai_substream(struct snd_soc_card *card,
		const char *dai_link, int stream)
{
	int i;

	for (i = 0; i < card->num_links; i++) {
		if (card->rtd[i].dai_link->no_pcm &&
			!strcmp(card->rtd[i].dai_link->name, dai_link))
			return card->rtd[i].pcm->streams[stream].substream;
	}
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	dev_dbg(card->dev, "ASoC: failed to find dai link %s\n", dai_link);
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	return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_get_dai_substream);

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

	for (i = 0; i < card->num_links; i++) {
		if (!strcmp(card->rtd[i].dai_link->name, dai_link))
			return &card->rtd[i];
	}
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	dev_dbg(card->dev, "ASoC: failed to find rtd %s\n", dai_link);
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	return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_get_pcm_runtime);

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#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) {
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		dev_err(codec->dev, "ASoC: Can't register ac97 bus\n");
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		codec->ac97->dev.bus = NULL;
		return err;
	}
	return 0;
}
#endif

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static void codec2codec_close_delayed_work(struct work_struct *work)
{
	/* Currently nothing to do for c2c links
	 * Since c2c links are internal nodes in the DAPM graph and
	 * don't interface with the outside world or application layer
	 * we don't have to do any special handling on close.
	 */
}

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#ifdef CONFIG_PM_SLEEP
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/* powers down audio subsystem for suspend */
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int snd_soc_suspend(struct device *dev)
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{
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	struct snd_soc_card *card = dev_get_drvdata(dev);
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	struct snd_soc_codec *codec;
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	int i;

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

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	/* Due to the resume being scheduled into a workqueue we could
	* suspend before that's finished - wait for it to complete.
	 */
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	snd_power_lock(card->snd_card);
	snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
	snd_power_unlock(card->snd_card);
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	/* we're going to block userspace touching us until resume completes */
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	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
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	/* mute any active DACs */
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	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *dai = card->rtd[i].codec_dai;
		struct snd_soc_dai_driver *drv = dai->driver;
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		if (card->rtd[i].dai_link->ignore_suspend)
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			continue;

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

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

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

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		if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
			cpu_dai->driver->suspend(cpu_dai);
		if (platform->driver->suspend && !platform->suspended) {
			platform->driver->suspend(cpu_dai);
			platform->suspended = 1;
		}
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	}

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

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

637 638 639 640
	/* Recheck all analogue paths too */
	dapm_mark_io_dirty(&card->dapm);
	snd_soc_dapm_sync(&card->dapm);

641
	/* suspend all CODECs */
642
	list_for_each_entry(codec, &card->codec_dev_list, card_list) {
643 644 645
		/* 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
646
			switch (codec->dapm.bias_level) {
647
			case SND_SOC_BIAS_STANDBY:
648 649 650 651 652 653 654 655
				/*
				 * If the CODEC is capable of idle
				 * bias off then being in STANDBY
				 * means it's doing something,
				 * otherwise fall through.
				 */
				if (codec->dapm.idle_bias_off) {
					dev_dbg(codec->dev,
656
						"ASoC: idle_bias_off CODEC on over suspend\n");
657 658
					break;
				}
659
			case SND_SOC_BIAS_OFF:
660
				codec->driver->suspend(codec);
661
				codec->suspended = 1;
662
				codec->cache_sync = 1;
663 664
				if (codec->using_regmap)
					regcache_mark_dirty(codec->control_data);
665 666
				/* deactivate pins to sleep state */
				pinctrl_pm_select_sleep_state(codec->dev);
667 668
				break;
			default:
669 670
				dev_dbg(codec->dev,
					"ASoC: CODEC is on over suspend\n");
671 672
				break;
			}
673 674
		}
	}
F
Frank Mandarino 已提交
675

676 677
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
678

679
		if (card->rtd[i].dai_link->ignore_suspend)
680 681
			continue;

682 683
		if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
			cpu_dai->driver->suspend(cpu_dai);
684 685 686

		/* deactivate pins to sleep state */
		pinctrl_pm_select_sleep_state(cpu_dai->dev);
F
Frank Mandarino 已提交
687 688
	}

689
	if (card->suspend_post)
690
		card->suspend_post(card);
F
Frank Mandarino 已提交
691 692 693

	return 0;
}
694
EXPORT_SYMBOL_GPL(snd_soc_suspend);
F
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695

696 697 698 699
/* 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
700
{
701 702
	struct snd_soc_card *card =
			container_of(work, struct snd_soc_card, deferred_resume_work);
703
	struct snd_soc_codec *codec;
F
Frank Mandarino 已提交
704 705
	int i;

706 707 708 709
	/* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
	 * so userspace apps are blocked from touching us
	 */

710
	dev_dbg(card->dev, "ASoC: starting resume work\n");
711

712
	/* Bring us up into D2 so that DAPM starts enabling things */
713
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
714

715
	if (card->resume_pre)
716
		card->resume_pre(card);
F
Frank Mandarino 已提交
717

718 719 720
	/* resume AC97 DAIs */
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
721

722
		if (card->rtd[i].dai_link->ignore_suspend)
723 724
			continue;

725 726 727 728
		if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
			cpu_dai->driver->resume(cpu_dai);
	}

729
	list_for_each_entry(codec, &card->codec_dev_list, card_list) {
730 731 732 733 734
		/* 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
735
			switch (codec->dapm.bias_level) {
736 737 738 739 740 741
			case SND_SOC_BIAS_STANDBY:
			case SND_SOC_BIAS_OFF:
				codec->driver->resume(codec);
				codec->suspended = 0;
				break;
			default:
742 743
				dev_dbg(codec->dev,
					"ASoC: CODEC was on over suspend\n");
744 745
				break;
			}
746 747
		}
	}
F
Frank Mandarino 已提交
748

749
	for (i = 0; i < card->num_rtd; i++) {
750

751
		if (card->rtd[i].dai_link->ignore_suspend)
752 753
			continue;

754
		snd_soc_dapm_stream_event(&card->rtd[i],
755
					  SNDRV_PCM_STREAM_PLAYBACK,
756
					  SND_SOC_DAPM_STREAM_RESUME);
757

758
		snd_soc_dapm_stream_event(&card->rtd[i],
759
					  SNDRV_PCM_STREAM_CAPTURE,
760
					  SND_SOC_DAPM_STREAM_RESUME);
F
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761 762
	}

763
	/* unmute any active DACs */
764 765 766
	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;
767

768
		if (card->rtd[i].dai_link->ignore_suspend)
769 770
			continue;

771 772
		if (drv->ops->digital_mute && dai->playback_active)
			drv->ops->digital_mute(dai, 0);
F
Frank Mandarino 已提交
773 774
	}

775 776 777
	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;
778

779
		if (card->rtd[i].dai_link->ignore_suspend)
780 781
			continue;

782 783 784 785 786 787
		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
788 789
	}

790
	if (card->resume_post)
791
		card->resume_post(card);
F
Frank Mandarino 已提交
792

793
	dev_dbg(card->dev, "ASoC: resume work completed\n");
794 795

	/* userspace can access us now we are back as we were before */
796
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
797 798 799 800

	/* Recheck all analogue paths too */
	dapm_mark_io_dirty(&card->dapm);
	snd_soc_dapm_sync(&card->dapm);
801 802 803
}

/* powers up audio subsystem after a suspend */
804
int snd_soc_resume(struct device *dev)
805
{
806
	struct snd_soc_card *card = dev_get_drvdata(dev);
807
	int i, ac97_control = 0;
808

809 810 811 812 813 814
	/* If the initialization of this soc device failed, there is no codec
	 * associated with it. Just bail out in this case.
	 */
	if (list_empty(&card->codec_dev_list))
		return 0;

815 816 817 818 819 820 821 822 823 824
	/* activate pins from sleep state */
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
		struct snd_soc_dai *codec_dai = card->rtd[i].codec_dai;
		if (cpu_dai->active)
			pinctrl_pm_select_default_state(cpu_dai->dev);
		if (codec_dai->active)
			pinctrl_pm_select_default_state(codec_dai->dev);
	}

825 826 827 828 829
	/* 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.
	 */
830 831
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
832 833 834
		ac97_control |= cpu_dai->driver->ac97_control;
	}
	if (ac97_control) {
835
		dev_dbg(dev, "ASoC: Resuming AC97 immediately\n");
836 837
		soc_resume_deferred(&card->deferred_resume_work);
	} else {
838
		dev_dbg(dev, "ASoC: Scheduling resume work\n");
839
		if (!schedule_work(&card->deferred_resume_work))
840
			dev_err(dev, "ASoC: resume work item may be lost\n");
841
	}
842

F
Frank Mandarino 已提交
843 844
	return 0;
}
845
EXPORT_SYMBOL_GPL(snd_soc_resume);
F
Frank Mandarino 已提交
846
#else
847 848
#define snd_soc_suspend NULL
#define snd_soc_resume NULL
F
Frank Mandarino 已提交
849 850
#endif

851
static const struct snd_soc_dai_ops null_dai_ops = {
852 853
};

854
static int soc_bind_dai_link(struct snd_soc_card *card, int num)
F
Frank Mandarino 已提交
855
{
856 857
	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
858
	struct snd_soc_codec *codec;
859
	struct snd_soc_platform *platform;
860
	struct snd_soc_dai *codec_dai, *cpu_dai;
861
	const char *platform_name;
862

863
	dev_dbg(card->dev, "ASoC: binding %s at idx %d\n", dai_link->name, num);
864

865
	/* Find CPU DAI from registered DAIs*/
866
	list_for_each_entry(cpu_dai, &dai_list, list) {
867 868 869 870 871 872 873 874 875
		if (dai_link->cpu_of_node &&
		    (cpu_dai->dev->of_node != dai_link->cpu_of_node))
			continue;
		if (dai_link->cpu_name &&
		    strcmp(dev_name(cpu_dai->dev), dai_link->cpu_name))
			continue;
		if (dai_link->cpu_dai_name &&
		    strcmp(cpu_dai->name, dai_link->cpu_dai_name))
			continue;
876 877

		rtd->cpu_dai = cpu_dai;
878
	}
879

880
	if (!rtd->cpu_dai) {
881
		dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",
882 883
			dai_link->cpu_dai_name);
		return -EPROBE_DEFER;
884 885
	}

886
	/* Find CODEC from registered CODECs */
887
	list_for_each_entry(codec, &codec_list, list) {
888 889 890 891 892 893 894
		if (dai_link->codec_of_node) {
			if (codec->dev->of_node != dai_link->codec_of_node)
				continue;
		} else {
			if (strcmp(codec->name, dai_link->codec_name))
				continue;
		}
895 896 897 898 899 900 901 902 903 904 905

		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)) {
906

907 908
				rtd->codec_dai = codec_dai;
			}
909
		}
910

911
		if (!rtd->codec_dai) {
912
			dev_err(card->dev, "ASoC: CODEC DAI %s not registered\n",
913 914 915
				dai_link->codec_dai_name);
			return -EPROBE_DEFER;
		}
916
	}
917

918
	if (!rtd->codec) {
919
		dev_err(card->dev, "ASoC: CODEC %s not registered\n",
920 921 922
			dai_link->codec_name);
		return -EPROBE_DEFER;
	}
923 924 925

	/* if there's no platform we match on the empty platform */
	platform_name = dai_link->platform_name;
926
	if (!platform_name && !dai_link->platform_of_node)
927 928
		platform_name = "snd-soc-dummy";

929
	/* find one from the set of registered platforms */
930
	list_for_each_entry(platform, &platform_list, list) {
931 932 933 934 935 936 937 938
		if (dai_link->platform_of_node) {
			if (platform->dev->of_node !=
			    dai_link->platform_of_node)
				continue;
		} else {
			if (strcmp(platform->name, platform_name))
				continue;
		}
939 940

		rtd->platform = platform;
941
	}
942
	if (!rtd->platform) {
943
		dev_err(card->dev, "ASoC: platform %s not registered\n",
944
			dai_link->platform_name);
945
		return -EPROBE_DEFER;
946
	}
947 948 949 950

	card->num_rtd++;

	return 0;
951 952
}

953 954 955 956 957 958 959
static int soc_remove_platform(struct snd_soc_platform *platform)
{
	int ret;

	if (platform->driver->remove) {
		ret = platform->driver->remove(platform);
		if (ret < 0)
960 961
			dev_err(platform->dev, "ASoC: failed to remove %d\n",
				ret);
962 963 964 965 966 967 968 969 970 971 972 973 974
	}

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

	soc_cleanup_platform_debugfs(platform);
	platform->probed = 0;
	list_del(&platform->card_list);
	module_put(platform->dev->driver->owner);

	return 0;
}

975 976 977 978 979 980 981
static void soc_remove_codec(struct snd_soc_codec *codec)
{
	int err;

	if (codec->driver->remove) {
		err = codec->driver->remove(codec);
		if (err < 0)
982
			dev_err(codec->dev, "ASoC: failed to remove %d\n", err);
983 984 985 986 987 988 989 990 991 992 993
	}

	/* 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);
}

994
static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
995 996 997 998 999 1000 1001
{
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
	struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
	int err;

	/* unregister the rtd device */
	if (rtd->dev_registered) {
1002 1003 1004
		device_remove_file(rtd->dev, &dev_attr_pmdown_time);
		device_remove_file(rtd->dev, &dev_attr_codec_reg);
		device_unregister(rtd->dev);
1005 1006 1007 1008
		rtd->dev_registered = 0;
	}

	/* remove the CODEC DAI */
1009 1010
	if (codec_dai && codec_dai->probed &&
			codec_dai->driver->remove_order == order) {
1011 1012 1013
		if (codec_dai->driver->remove) {
			err = codec_dai->driver->remove(codec_dai);
			if (err < 0)
1014 1015 1016
				dev_err(codec_dai->dev,
					"ASoC: failed to remove %s: %d\n",
					codec_dai->name, err);
1017
		}
1018 1019 1020
		codec_dai->probed = 0;
		list_del(&codec_dai->card_list);
	}
1021

1022
	/* remove the cpu_dai */
1023 1024
	if (cpu_dai && cpu_dai->probed &&
			cpu_dai->driver->remove_order == order) {
1025 1026 1027
		if (cpu_dai->driver->remove) {
			err = cpu_dai->driver->remove(cpu_dai);
			if (err < 0)
1028 1029 1030
				dev_err(cpu_dai->dev,
					"ASoC: failed to remove %s: %d\n",
					cpu_dai->name, err);
F
Frank Mandarino 已提交
1031
		}
1032 1033
		cpu_dai->probed = 0;
		list_del(&cpu_dai->card_list);
1034

1035 1036
		if (!cpu_dai->codec) {
			snd_soc_dapm_free(&cpu_dai->dapm);
1037
			module_put(cpu_dai->dev->driver->owner);
1038
		}
F
Frank Mandarino 已提交
1039
	}
1040
}
F
Frank Mandarino 已提交
1041

1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073
static void soc_remove_link_components(struct snd_soc_card *card, int num,
				       int order)
{
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_codec *codec;

	/* remove the platform */
	if (platform && platform->probed &&
	    platform->driver->remove_order == order) {
		soc_remove_platform(platform);
	}

	/* remove the CODEC-side CODEC */
	if (codec_dai) {
		codec = codec_dai->codec;
		if (codec && codec->probed &&
		    codec->driver->remove_order == order)
			soc_remove_codec(codec);
	}

	/* remove any CPU-side CODEC */
	if (cpu_dai) {
		codec = cpu_dai->codec;
		if (codec && codec->probed &&
		    codec->driver->remove_order == order)
			soc_remove_codec(codec);
	}
}

1074 1075
static void soc_remove_dai_links(struct snd_soc_card *card)
{
1076
	int dai, order;
1077

1078 1079 1080
	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
			order++) {
		for (dai = 0; dai < card->num_rtd; dai++)
1081 1082 1083 1084 1085 1086 1087
			soc_remove_link_dais(card, dai, order);
	}

	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
			order++) {
		for (dai = 0; dai < card->num_rtd; dai++)
			soc_remove_link_components(card, dai, order);
1088
	}
1089

1090 1091 1092
	card->num_rtd = 0;
}

1093 1094 1095 1096 1097
static void soc_set_name_prefix(struct snd_soc_card *card,
				struct snd_soc_codec *codec)
{
	int i;

1098
	if (card->codec_conf == NULL)
1099 1100
		return;

1101 1102
	for (i = 0; i < card->num_configs; i++) {
		struct snd_soc_codec_conf *map = &card->codec_conf[i];
1103 1104 1105 1106 1107 1108 1109
		if (map->dev_name && !strcmp(codec->name, map->dev_name)) {
			codec->name_prefix = map->name_prefix;
			break;
		}
	}
}

1110 1111 1112 1113
static int soc_probe_codec(struct snd_soc_card *card,
			   struct snd_soc_codec *codec)
{
	int ret = 0;
1114
	const struct snd_soc_codec_driver *driver = codec->driver;
1115
	struct snd_soc_dai *dai;
1116 1117 1118 1119 1120

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

1121 1122 1123
	if (!try_module_get(codec->dev->driver->owner))
		return -ENODEV;

1124 1125
	soc_init_codec_debugfs(codec);

1126 1127 1128 1129
	if (driver->dapm_widgets)
		snd_soc_dapm_new_controls(&codec->dapm, driver->dapm_widgets,
					  driver->num_dapm_widgets);

1130 1131 1132 1133 1134 1135 1136 1137
	/* Create DAPM widgets for each DAI stream */
	list_for_each_entry(dai, &dai_list, list) {
		if (dai->dev != codec->dev)
			continue;

		snd_soc_dapm_new_dai_widgets(&codec->dapm, dai);
	}

1138 1139
	codec->dapm.idle_bias_off = driver->idle_bias_off;

1140 1141
	if (driver->probe) {
		ret = driver->probe(codec);
1142 1143
		if (ret < 0) {
			dev_err(codec->dev,
1144
				"ASoC: failed to probe CODEC %d\n", ret);
1145
			goto err_probe;
1146
		}
1147 1148
		WARN(codec->dapm.idle_bias_off &&
			codec->dapm.bias_level != SND_SOC_BIAS_OFF,
1149 1150
			"codec %s can not start from non-off bias with idle_bias_off==1\n",
			codec->name);
1151 1152
	}

1153
	/* If the driver didn't set I/O up try regmap */
1154
	if (!codec->write && dev_get_regmap(codec->dev, NULL))
1155 1156
		snd_soc_codec_set_cache_io(codec, 0, 0, SND_SOC_REGMAP);

1157
	if (driver->controls)
1158
		snd_soc_add_codec_controls(codec, driver->controls,
1159
				     driver->num_controls);
1160 1161 1162 1163
	if (driver->dapm_routes)
		snd_soc_dapm_add_routes(&codec->dapm, driver->dapm_routes,
					driver->num_dapm_routes);

1164 1165 1166
	/* mark codec as probed and add to card codec list */
	codec->probed = 1;
	list_add(&codec->card_list, &card->codec_dev_list);
1167
	list_add(&codec->dapm.list, &card->dapm_list);
1168

1169 1170 1171
	return 0;

err_probe:
1172
	soc_cleanup_codec_debugfs(codec);
1173 1174
	module_put(codec->dev->driver->owner);

1175 1176 1177
	return ret;
}

1178 1179 1180 1181 1182
static int soc_probe_platform(struct snd_soc_card *card,
			   struct snd_soc_platform *platform)
{
	int ret = 0;
	const struct snd_soc_platform_driver *driver = platform->driver;
1183
	struct snd_soc_dai *dai;
1184 1185

	platform->card = card;
1186
	platform->dapm.card = card;
1187 1188 1189 1190

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

1191 1192
	soc_init_platform_debugfs(platform);

1193 1194 1195 1196
	if (driver->dapm_widgets)
		snd_soc_dapm_new_controls(&platform->dapm,
			driver->dapm_widgets, driver->num_dapm_widgets);

1197 1198 1199 1200 1201 1202 1203 1204
	/* Create DAPM widgets for each DAI stream */
	list_for_each_entry(dai, &dai_list, list) {
		if (dai->dev != platform->dev)
			continue;

		snd_soc_dapm_new_dai_widgets(&platform->dapm, dai);
	}

1205 1206
	platform->dapm.idle_bias_off = 1;

1207 1208 1209 1210
	if (driver->probe) {
		ret = driver->probe(platform);
		if (ret < 0) {
			dev_err(platform->dev,
1211
				"ASoC: failed to probe platform %d\n", ret);
1212 1213 1214 1215
			goto err_probe;
		}
	}

1216 1217 1218 1219 1220 1221 1222
	if (driver->controls)
		snd_soc_add_platform_controls(platform, driver->controls,
				     driver->num_controls);
	if (driver->dapm_routes)
		snd_soc_dapm_add_routes(&platform->dapm, driver->dapm_routes,
					driver->num_dapm_routes);

1223 1224 1225
	/* mark platform as probed and add to card platform list */
	platform->probed = 1;
	list_add(&platform->card_list, &card->platform_dev_list);
1226
	list_add(&platform->dapm.list, &card->dapm_list);
1227 1228 1229 1230

	return 0;

err_probe:
1231
	soc_cleanup_platform_debugfs(platform);
1232 1233 1234 1235 1236
	module_put(platform->dev->driver->owner);

	return ret;
}

1237 1238 1239 1240
static void rtd_release(struct device *dev)
{
	kfree(dev);
}
1241

1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260
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;
	}
1261
	rtd->card = card;
1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272

	/* 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) {
1273
		dev_err(card->dev, "ASoC: failed to init %s: %d\n", name, ret);
1274 1275 1276 1277 1278 1279
		return ret;
	}
	codec->name_prefix = temp;

	/* register the rtd device */
	rtd->codec = codec;
1280 1281 1282 1283 1284 1285 1286 1287 1288

	rtd->dev = kzalloc(sizeof(struct device), GFP_KERNEL);
	if (!rtd->dev)
		return -ENOMEM;
	device_initialize(rtd->dev);
	rtd->dev->parent = card->dev;
	rtd->dev->release = rtd_release;
	rtd->dev->init_name = name;
	dev_set_drvdata(rtd->dev, rtd);
L
Liam Girdwood 已提交
1289
	mutex_init(&rtd->pcm_mutex);
1290 1291 1292 1293
	INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].be_clients);
	INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].be_clients);
	INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_PLAYBACK].fe_clients);
	INIT_LIST_HEAD(&rtd->dpcm[SNDRV_PCM_STREAM_CAPTURE].fe_clients);
1294
	ret = device_add(rtd->dev);
1295
	if (ret < 0) {
1296 1297
		/* calling put_device() here to free the rtd->dev */
		put_device(rtd->dev);
1298
		dev_err(card->dev,
1299
			"ASoC: failed to register runtime device: %d\n", ret);
1300 1301 1302 1303 1304
		return ret;
	}
	rtd->dev_registered = 1;

	/* add DAPM sysfs entries for this codec */
1305
	ret = snd_soc_dapm_sys_add(rtd->dev);
1306 1307
	if (ret < 0)
		dev_err(codec->dev,
1308
			"ASoC: failed to add codec dapm sysfs entries: %d\n", ret);
1309 1310

	/* add codec sysfs entries */
1311
	ret = device_create_file(rtd->dev, &dev_attr_codec_reg);
1312 1313
	if (ret < 0)
		dev_err(codec->dev,
1314
			"ASoC: failed to add codec sysfs files: %d\n", ret);
1315

1316 1317
#ifdef CONFIG_DEBUG_FS
	/* add DPCM sysfs entries */
1318
	if (!dailess && !dai_link->dynamic)
1319 1320 1321 1322
		goto out;

	ret = soc_dpcm_debugfs_add(rtd);
	if (ret < 0)
1323
		dev_err(rtd->dev, "ASoC: failed to add dpcm sysfs entries: %d\n", ret);
1324 1325 1326

out:
#endif
1327 1328 1329
	return 0;
}

1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367
static int soc_probe_link_components(struct snd_soc_card *card, int num,
				     int order)
{
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_platform *platform = rtd->platform;
	int ret;

	/* probe the CPU-side component, if it is a CODEC */
	if (cpu_dai->codec &&
	    !cpu_dai->codec->probed &&
	    cpu_dai->codec->driver->probe_order == order) {
		ret = soc_probe_codec(card, cpu_dai->codec);
		if (ret < 0)
			return ret;
	}

	/* probe the CODEC-side component */
	if (!codec_dai->codec->probed &&
	    codec_dai->codec->driver->probe_order == order) {
		ret = soc_probe_codec(card, codec_dai->codec);
		if (ret < 0)
			return ret;
	}

	/* probe the platform */
	if (!platform->probed &&
	    platform->driver->probe_order == order) {
		ret = soc_probe_platform(card, platform);
		if (ret < 0)
			return ret;
	}

	return 0;
}

static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
1368 1369 1370 1371 1372
{
	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;
1373 1374 1375
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dapm_widget *play_w, *capture_w;
1376 1377
	int ret;

1378
	dev_dbg(card->dev, "ASoC: probe %s dai link %d late %d\n",
1379
			card->name, num, order);
1380 1381 1382 1383 1384 1385 1386 1387 1388 1389

	/* config components */
	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 */
1390 1391
	if (!cpu_dai->probed &&
			cpu_dai->driver->probe_order == order) {
1392 1393 1394 1395
		if (!cpu_dai->codec) {
			cpu_dai->dapm.card = card;
			if (!try_module_get(cpu_dai->dev->driver->owner))
				return -ENODEV;
1396

1397
			list_add(&cpu_dai->dapm.list, &card->dapm_list);
1398
		}
1399

1400 1401 1402
		if (cpu_dai->driver->probe) {
			ret = cpu_dai->driver->probe(cpu_dai);
			if (ret < 0) {
1403 1404 1405
				dev_err(cpu_dai->dev,
					"ASoC: failed to probe CPU DAI %s: %d\n",
					cpu_dai->name, ret);
1406
				module_put(cpu_dai->dev->driver->owner);
1407 1408 1409 1410
				return ret;
			}
		}
		cpu_dai->probed = 1;
1411
		/* mark cpu_dai as probed and add to card dai list */
1412
		list_add(&cpu_dai->card_list, &card->dai_dev_list);
F
Frank Mandarino 已提交
1413 1414
	}

1415
	/* probe the CODEC DAI */
1416
	if (!codec_dai->probed && codec_dai->driver->probe_order == order) {
1417 1418
		if (codec_dai->driver->probe) {
			ret = codec_dai->driver->probe(codec_dai);
M
Mark Brown 已提交
1419
			if (ret < 0) {
1420 1421 1422
				dev_err(codec_dai->dev,
					"ASoC: failed to probe CODEC DAI %s: %d\n",
					codec_dai->name, ret);
1423
				return ret;
M
Mark Brown 已提交
1424 1425
			}
		}
1426

1427
		/* mark codec_dai as probed and add to card dai list */
1428 1429
		codec_dai->probed = 1;
		list_add(&codec_dai->card_list, &card->dai_dev_list);
M
Mark Brown 已提交
1430 1431
	}

1432 1433 1434 1435
	/* complete DAI probe during last probe */
	if (order != SND_SOC_COMP_ORDER_LAST)
		return 0;

1436 1437
	ret = soc_post_component_init(card, codec, num, 0);
	if (ret)
1438
		return ret;
M
Mark Brown 已提交
1439

1440
	ret = device_create_file(rtd->dev, &dev_attr_pmdown_time);
1441
	if (ret < 0)
1442 1443
		dev_warn(rtd->dev, "ASoC: failed to add pmdown_time sysfs: %d\n",
			ret);
1444

1445 1446 1447
	if (cpu_dai->driver->compress_dai) {
		/*create compress_device"*/
		ret = soc_new_compress(rtd, num);
1448
		if (ret < 0) {
1449
			dev_err(card->dev, "ASoC: can't create compress %s\n",
1450
					 dai_link->stream_name);
1451 1452 1453
			return ret;
		}
	} else {
1454 1455 1456 1457 1458

		if (!dai_link->params) {
			/* create the pcm */
			ret = soc_new_pcm(rtd, num);
			if (ret < 0) {
1459
				dev_err(card->dev, "ASoC: can't create pcm %s :%d\n",
1460
				       dai_link->stream_name, ret);
1461 1462
				return ret;
			}
1463
		} else {
1464 1465 1466
			INIT_DELAYED_WORK(&rtd->delayed_work,
						codec2codec_close_delayed_work);

1467 1468 1469 1470 1471 1472 1473
			/* link the DAI widgets */
			play_w = codec_dai->playback_widget;
			capture_w = cpu_dai->capture_widget;
			if (play_w && capture_w) {
				ret = snd_soc_dapm_new_pcm(card, dai_link->params,
						   capture_w, play_w);
				if (ret != 0) {
1474
					dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1475 1476 1477 1478
						play_w->name, capture_w->name, ret);
					return ret;
				}
			}
1479

1480 1481 1482 1483
			play_w = cpu_dai->playback_widget;
			capture_w = codec_dai->capture_widget;
			if (play_w && capture_w) {
				ret = snd_soc_dapm_new_pcm(card, dai_link->params,
1484
						   capture_w, play_w);
1485
				if (ret != 0) {
1486
					dev_err(card->dev, "ASoC: Can't link %s to %s: %d\n",
1487 1488 1489
						play_w->name, capture_w->name, ret);
					return ret;
				}
1490 1491
			}
		}
1492 1493 1494 1495 1496 1497 1498 1499 1500
	}

	/* 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
1501
#ifdef CONFIG_SND_SOC_AC97_BUS
1502 1503 1504 1505
static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
{
	int ret;

M
Mark Brown 已提交
1506 1507 1508
	/* Only instantiate AC97 if not already done by the adaptor
	 * for the generic AC97 subsystem.
	 */
1509
	if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1510 1511 1512 1513 1514 1515 1516 1517 1518 1519
		/*
		 * 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;
1520 1521

		ret = soc_ac97_dev_register(rtd->codec);
M
Mark Brown 已提交
1522
		if (ret < 0) {
1523 1524
			dev_err(rtd->codec->dev,
				"ASoC: AC97 device register failed: %d\n", ret);
1525
			return ret;
M
Mark Brown 已提交
1526
		}
1527 1528

		rtd->codec->ac97_registered = 1;
M
Mark Brown 已提交
1529
	}
1530 1531 1532 1533 1534 1535 1536 1537 1538 1539
	return 0;
}

static void soc_unregister_ac97_dai_link(struct snd_soc_codec *codec)
{
	if (codec->ac97_registered) {
		soc_ac97_dev_unregister(codec);
		codec->ac97_registered = 0;
	}
}
M
Mark Brown 已提交
1540 1541
#endif

1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552
static int soc_check_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;

	/* find CODEC from registered CODECs*/
	list_for_each_entry(codec, &codec_list, list) {
		if (!strcmp(codec->name, aux_dev->codec_name))
			return 0;
	}

1553
	dev_err(card->dev, "ASoC: %s not registered\n", aux_dev->codec_name);
1554

1555 1556 1557
	return -EPROBE_DEFER;
}

1558 1559 1560 1561
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;
1562
	int ret = -ENODEV;
1563 1564 1565 1566 1567 1568

	/* 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,
1569
					"ASoC: codec already probed");
1570 1571 1572
				ret = -EBUSY;
				goto out;
			}
1573
			goto found;
1574 1575
		}
	}
1576
	/* codec not found */
1577
	dev_err(card->dev, "ASoC: codec %s not found", aux_dev->codec_name);
1578
	return -EPROBE_DEFER;
1579

1580
found:
1581
	ret = soc_probe_codec(card, codec);
1582
	if (ret < 0)
1583
		return ret;
1584

1585
	ret = soc_post_component_init(card, codec, num, 1);
1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597

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) {
1598
		device_remove_file(rtd->dev, &dev_attr_codec_reg);
1599
		device_unregister(rtd->dev);
1600 1601 1602
		rtd->dev_registered = 0;
	}

1603 1604
	if (codec && codec->probed)
		soc_remove_codec(codec);
1605 1606
}

1607
static int snd_soc_init_codec_cache(struct snd_soc_codec *codec)
1608 1609 1610 1611 1612 1613 1614 1615
{
	int ret;

	if (codec->cache_init)
		return 0;

	ret = snd_soc_cache_init(codec);
	if (ret < 0) {
1616 1617 1618
		dev_err(codec->dev,
			"ASoC: Failed to set cache compression type: %d\n",
			ret);
1619 1620 1621 1622 1623 1624
		return ret;
	}
	codec->cache_init = 1;
	return 0;
}

1625
static int snd_soc_instantiate_card(struct snd_soc_card *card)
1626
{
1627
	struct snd_soc_codec *codec;
1628
	struct snd_soc_dai_link *dai_link;
1629
	int ret, i, order, dai_fmt;
M
Mark Brown 已提交
1630

1631
	mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_INIT);
1632

1633
	/* bind DAIs */
1634 1635 1636 1637 1638
	for (i = 0; i < card->num_links; i++) {
		ret = soc_bind_dai_link(card, i);
		if (ret != 0)
			goto base_error;
	}
M
Mark Brown 已提交
1639

1640 1641 1642 1643 1644
	/* check aux_devs too */
	for (i = 0; i < card->num_aux_devs; i++) {
		ret = soc_check_aux_dev(card, i);
		if (ret != 0)
			goto base_error;
1645
	}
1646

1647 1648 1649 1650
	/* initialize the register cache for each available codec */
	list_for_each_entry(codec, &codec_list, list) {
		if (codec->cache_init)
			continue;
1651
		ret = snd_soc_init_codec_cache(codec);
1652 1653
		if (ret < 0)
			goto base_error;
1654 1655
	}

1656 1657 1658 1659
	/* 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) {
1660 1661 1662
		dev_err(card->dev,
			"ASoC: can't create sound card for card %s: %d\n",
			card->name, ret);
1663
		goto base_error;
1664 1665 1666
	}
	card->snd_card->dev = card->dev;

M
Mark Brown 已提交
1667 1668 1669 1670 1671
	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);

1672 1673 1674 1675
#ifdef CONFIG_DEBUG_FS
	snd_soc_dapm_debugfs_init(&card->dapm, card->debugfs_card_root);
#endif

1676
#ifdef CONFIG_PM_SLEEP
1677 1678 1679
	/* deferred resume work */
	INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
#endif
F
Frank Mandarino 已提交
1680

1681 1682 1683 1684
	if (card->dapm_widgets)
		snd_soc_dapm_new_controls(&card->dapm, card->dapm_widgets,
					  card->num_dapm_widgets);

1685 1686
	/* initialise the sound card only once */
	if (card->probe) {
1687
		ret = card->probe(card);
1688 1689 1690
		if (ret < 0)
			goto card_probe_error;
	}
M
Mark Brown 已提交
1691

1692
	/* probe all components used by DAI links on this card */
1693 1694 1695
	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
			order++) {
		for (i = 0; i < card->num_links; i++) {
1696
			ret = soc_probe_link_components(card, i, order);
1697
			if (ret < 0) {
1698 1699 1700
				dev_err(card->dev,
					"ASoC: failed to instantiate card %d\n",
					ret);
1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711
				goto probe_dai_err;
			}
		}
	}

	/* probe all DAI links on this card */
	for (order = SND_SOC_COMP_ORDER_FIRST; order <= SND_SOC_COMP_ORDER_LAST;
			order++) {
		for (i = 0; i < card->num_links; i++) {
			ret = soc_probe_link_dais(card, i, order);
			if (ret < 0) {
1712 1713 1714
				dev_err(card->dev,
					"ASoC: failed to instantiate card %d\n",
					ret);
1715 1716
				goto probe_dai_err;
			}
1717 1718
		}
	}
F
Frank Mandarino 已提交
1719

1720 1721 1722
	for (i = 0; i < card->num_aux_devs; i++) {
		ret = soc_probe_aux_dev(card, i);
		if (ret < 0) {
1723 1724 1725
			dev_err(card->dev,
				"ASoC: failed to add auxiliary devices %d\n",
				ret);
1726 1727 1728 1729
			goto probe_aux_dev_err;
		}
	}

1730
	snd_soc_dapm_link_dai_widgets(card);
1731
	snd_soc_dapm_connect_dai_link_widgets(card);
1732

1733
	if (card->controls)
1734
		snd_soc_add_card_controls(card, card->controls, card->num_controls);
1735

1736 1737 1738 1739
	if (card->dapm_routes)
		snd_soc_dapm_add_routes(&card->dapm, card->dapm_routes,
					card->num_dapm_routes);

1740 1741
	for (i = 0; i < card->num_links; i++) {
		dai_link = &card->dai_link[i];
1742
		dai_fmt = dai_link->dai_fmt;
1743

1744
		if (dai_fmt) {
1745
			ret = snd_soc_dai_set_fmt(card->rtd[i].codec_dai,
1746
						  dai_fmt);
1747
			if (ret != 0 && ret != -ENOTSUPP)
1748
				dev_warn(card->rtd[i].codec_dai->dev,
1749
					 "ASoC: Failed to set DAI format: %d\n",
1750
					 ret);
1751 1752 1753
		}

		/* If this is a regular CPU link there will be a platform */
1754 1755
		if (dai_fmt &&
		    (dai_link->platform_name || dai_link->platform_of_node)) {
1756 1757 1758 1759
			ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
						  dai_fmt);
			if (ret != 0 && ret != -ENOTSUPP)
				dev_warn(card->rtd[i].cpu_dai->dev,
1760
					 "ASoC: Failed to set DAI format: %d\n",
1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779
					 ret);
		} else if (dai_fmt) {
			/* Flip the polarity for the "CPU" end */
			dai_fmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
			switch (dai_link->dai_fmt &
				SND_SOC_DAIFMT_MASTER_MASK) {
			case SND_SOC_DAIFMT_CBM_CFM:
				dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
				break;
			case SND_SOC_DAIFMT_CBM_CFS:
				dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
				break;
			case SND_SOC_DAIFMT_CBS_CFM:
				dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
				break;
			case SND_SOC_DAIFMT_CBS_CFS:
				dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
				break;
			}
1780 1781

			ret = snd_soc_dai_set_fmt(card->rtd[i].cpu_dai,
1782
						  dai_fmt);
1783
			if (ret != 0 && ret != -ENOTSUPP)
1784
				dev_warn(card->rtd[i].cpu_dai->dev,
1785
					 "ASoC: Failed to set DAI format: %d\n",
1786 1787 1788 1789
					 ret);
		}
	}

1790 1791
	snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
		 "%s", card->name);
1792 1793
	snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
		 "%s", card->long_name ? card->long_name : card->name);
1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807
	snprintf(card->snd_card->driver, sizeof(card->snd_card->driver),
		 "%s", card->driver_name ? card->driver_name : card->name);
	for (i = 0; i < ARRAY_SIZE(card->snd_card->driver); i++) {
		switch (card->snd_card->driver[i]) {
		case '_':
		case '-':
		case '\0':
			break;
		default:
			if (!isalnum(card->snd_card->driver[i]))
				card->snd_card->driver[i] = '_';
			break;
		}
	}
1808

1809 1810 1811
	if (card->late_probe) {
		ret = card->late_probe(card);
		if (ret < 0) {
1812
			dev_err(card->dev, "ASoC: %s late_probe() failed: %d\n",
1813 1814 1815 1816 1817
				card->name, ret);
			goto probe_aux_dev_err;
		}
	}

1818
	if (card->fully_routed)
1819
		list_for_each_entry(codec, &card->codec_dev_list, card_list)
1820 1821
			snd_soc_dapm_auto_nc_codec_pins(codec);

1822
	snd_soc_dapm_new_widgets(card);
1823

1824 1825
	ret = snd_card_register(card->snd_card);
	if (ret < 0) {
1826 1827
		dev_err(card->dev, "ASoC: failed to register soundcard %d\n",
				ret);
1828
		goto probe_aux_dev_err;
F
Frank Mandarino 已提交
1829 1830
	}

1831 1832 1833
#ifdef CONFIG_SND_SOC_AC97_BUS
	/* register any AC97 codecs */
	for (i = 0; i < card->num_rtd; i++) {
1834 1835
		ret = soc_register_ac97_dai_link(&card->rtd[i]);
		if (ret < 0) {
1836 1837
			dev_err(card->dev,
				"ASoC: failed to register AC97: %d\n", ret);
1838
			while (--i >= 0)
M
Mark Brown 已提交
1839
				soc_unregister_ac97_dai_link(card->rtd[i].codec);
1840
			goto probe_aux_dev_err;
1841
		}
1842
	}
1843 1844 1845
#endif

	card->instantiated = 1;
1846
	snd_soc_dapm_sync(&card->dapm);
1847
	mutex_unlock(&card->mutex);
1848 1849

	return 0;
1850

1851 1852 1853 1854
probe_aux_dev_err:
	for (i = 0; i < card->num_aux_devs; i++)
		soc_remove_aux_dev(card, i);

1855
probe_dai_err:
1856
	soc_remove_dai_links(card);
1857 1858

card_probe_error:
1859
	if (card->remove)
1860
		card->remove(card);
1861 1862 1863

	snd_card_free(card->snd_card);

1864
base_error:
1865
	mutex_unlock(&card->mutex);
F
Frank Mandarino 已提交
1866

1867
	return ret;
1868 1869 1870 1871 1872
}

/* probes a new socdev */
static int soc_probe(struct platform_device *pdev)
{
1873
	struct snd_soc_card *card = platform_get_drvdata(pdev);
1874

1875 1876 1877 1878 1879 1880 1881
	/*
	 * no card, so machine driver should be registering card
	 * we should not be here in that case so ret error
	 */
	if (!card)
		return -EINVAL;

1882
	dev_warn(&pdev->dev,
1883
		 "ASoC: machine %s should use snd_soc_register_card()\n",
1884 1885
		 card->name);

1886 1887
	/* Bodge while we unpick instantiation */
	card->dev = &pdev->dev;
1888

1889
	return snd_soc_register_card(card);
F
Frank Mandarino 已提交
1890 1891
}

1892
static int soc_cleanup_card_resources(struct snd_soc_card *card)
F
Frank Mandarino 已提交
1893 1894 1895
{
	int i;

1896 1897 1898
	/* make sure any delayed work runs */
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1899
		flush_delayed_work(&rtd->delayed_work);
1900
	}
1901

1902 1903 1904
	/* remove auxiliary devices */
	for (i = 0; i < card->num_aux_devs; i++)
		soc_remove_aux_dev(card, i);
F
Frank Mandarino 已提交
1905

1906
	/* remove and free each DAI */
1907
	soc_remove_dai_links(card);
1908

1909
	soc_cleanup_card_debugfs(card);
1910

1911 1912
	/* remove the card */
	if (card->remove)
1913
		card->remove(card);
1914

1915 1916
	snd_soc_dapm_free(&card->dapm);

1917 1918 1919 1920 1921 1922 1923 1924 1925
	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
1926

M
Mark Brown 已提交
1927
	snd_soc_unregister_card(card);
F
Frank Mandarino 已提交
1928 1929 1930
	return 0;
}

1931
int snd_soc_poweroff(struct device *dev)
M
Mark Brown 已提交
1932
{
1933
	struct snd_soc_card *card = dev_get_drvdata(dev);
1934
	int i;
M
Mark Brown 已提交
1935 1936

	if (!card->instantiated)
M
Mark Brown 已提交
1937
		return 0;
M
Mark Brown 已提交
1938 1939 1940

	/* Flush out pmdown_time work - we actually do want to run it
	 * now, we're shutting down so no imminent restart. */
1941 1942
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
1943
		flush_delayed_work(&rtd->delayed_work);
1944
	}
M
Mark Brown 已提交
1945

1946
	snd_soc_dapm_shutdown(card);
M
Mark Brown 已提交
1947

1948 1949 1950 1951 1952 1953 1954 1955
	/* deactivate pins to sleep state */
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
		struct snd_soc_dai *codec_dai = card->rtd[i].codec_dai;
		pinctrl_pm_select_sleep_state(codec_dai->dev);
		pinctrl_pm_select_sleep_state(cpu_dai->dev);
	}

M
Mark Brown 已提交
1956
	return 0;
M
Mark Brown 已提交
1957
}
1958
EXPORT_SYMBOL_GPL(snd_soc_poweroff);
M
Mark Brown 已提交
1959

1960
const struct dev_pm_ops snd_soc_pm_ops = {
1961 1962 1963 1964
	.suspend = snd_soc_suspend,
	.resume = snd_soc_resume,
	.freeze = snd_soc_suspend,
	.thaw = snd_soc_resume,
1965
	.poweroff = snd_soc_poweroff,
1966
	.restore = snd_soc_resume,
M
Mark Brown 已提交
1967
};
1968
EXPORT_SYMBOL_GPL(snd_soc_pm_ops);
M
Mark Brown 已提交
1969

F
Frank Mandarino 已提交
1970 1971 1972 1973
/* ASoC platform driver */
static struct platform_driver soc_driver = {
	.driver		= {
		.name		= "soc-audio",
1974
		.owner		= THIS_MODULE,
1975
		.pm		= &snd_soc_pm_ops,
F
Frank Mandarino 已提交
1976 1977 1978 1979 1980
	},
	.probe		= soc_probe,
	.remove		= soc_remove,
};

1981 1982 1983 1984 1985 1986 1987 1988
/**
 * 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.
 */
1989 1990
int snd_soc_codec_volatile_register(struct snd_soc_codec *codec,
				    unsigned int reg)
1991
{
1992 1993
	if (codec->volatile_register)
		return codec->volatile_register(codec, reg);
1994 1995 1996 1997 1998
	else
		return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);

1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
/**
 * 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
2013
		return 1;
2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030
}
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
2031
		return 1;
2032 2033 2034
}
EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);

2035 2036 2037 2038 2039 2040
int snd_soc_platform_read(struct snd_soc_platform *platform,
					unsigned int reg)
{
	unsigned int ret;

	if (!platform->driver->read) {
2041
		dev_err(platform->dev, "ASoC: platform has no read back\n");
2042 2043 2044 2045 2046
		return -1;
	}

	ret = platform->driver->read(platform, reg);
	dev_dbg(platform->dev, "read %x => %x\n", reg, ret);
2047
	trace_snd_soc_preg_read(platform, reg, ret);
2048 2049 2050 2051 2052 2053 2054 2055 2056

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_platform_read);

int snd_soc_platform_write(struct snd_soc_platform *platform,
					 unsigned int reg, unsigned int val)
{
	if (!platform->driver->write) {
2057
		dev_err(platform->dev, "ASoC: platform has no write back\n");
2058 2059 2060 2061
		return -1;
	}

	dev_dbg(platform->dev, "write %x = %x\n", reg, val);
2062
	trace_snd_soc_preg_write(platform, reg, val);
2063 2064 2065 2066
	return platform->driver->write(platform, reg, val);
}
EXPORT_SYMBOL_GPL(snd_soc_platform_write);

F
Frank Mandarino 已提交
2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095
/**
 * 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;
2096 2097 2098 2099 2100 2101 2102

	/*
	 * 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
2103 2104 2105 2106 2107
	mutex_unlock(&codec->mutex);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);

2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 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 2211 2212 2213 2214 2215 2216 2217 2218
static struct snd_ac97_reset_cfg snd_ac97_rst_cfg;

static void snd_soc_ac97_warm_reset(struct snd_ac97 *ac97)
{
	struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;

	pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_warm_reset);

	gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 1);

	udelay(10);

	gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);

	pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);
	msleep(2);
}

static void snd_soc_ac97_reset(struct snd_ac97 *ac97)
{
	struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;

	pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_reset);

	gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);
	gpio_direction_output(snd_ac97_rst_cfg.gpio_sdata, 0);
	gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 0);

	udelay(10);

	gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 1);

	pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);
	msleep(2);
}

static int snd_soc_ac97_parse_pinctl(struct device *dev,
		struct snd_ac97_reset_cfg *cfg)
{
	struct pinctrl *p;
	struct pinctrl_state *state;
	int gpio;
	int ret;

	p = devm_pinctrl_get(dev);
	if (IS_ERR(p)) {
		dev_err(dev, "Failed to get pinctrl\n");
		return PTR_RET(p);
	}
	cfg->pctl = p;

	state = pinctrl_lookup_state(p, "ac97-reset");
	if (IS_ERR(state)) {
		dev_err(dev, "Can't find pinctrl state ac97-reset\n");
		return PTR_RET(state);
	}
	cfg->pstate_reset = state;

	state = pinctrl_lookup_state(p, "ac97-warm-reset");
	if (IS_ERR(state)) {
		dev_err(dev, "Can't find pinctrl state ac97-warm-reset\n");
		return PTR_RET(state);
	}
	cfg->pstate_warm_reset = state;

	state = pinctrl_lookup_state(p, "ac97-running");
	if (IS_ERR(state)) {
		dev_err(dev, "Can't find pinctrl state ac97-running\n");
		return PTR_RET(state);
	}
	cfg->pstate_run = state;

	gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 0);
	if (gpio < 0) {
		dev_err(dev, "Can't find ac97-sync gpio\n");
		return gpio;
	}
	ret = devm_gpio_request(dev, gpio, "AC97 link sync");
	if (ret) {
		dev_err(dev, "Failed requesting ac97-sync gpio\n");
		return ret;
	}
	cfg->gpio_sync = gpio;

	gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 1);
	if (gpio < 0) {
		dev_err(dev, "Can't find ac97-sdata gpio %d\n", gpio);
		return gpio;
	}
	ret = devm_gpio_request(dev, gpio, "AC97 link sdata");
	if (ret) {
		dev_err(dev, "Failed requesting ac97-sdata gpio\n");
		return ret;
	}
	cfg->gpio_sdata = gpio;

	gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 2);
	if (gpio < 0) {
		dev_err(dev, "Can't find ac97-reset gpio\n");
		return gpio;
	}
	ret = devm_gpio_request(dev, gpio, "AC97 link reset");
	if (ret) {
		dev_err(dev, "Failed requesting ac97-reset gpio\n");
		return ret;
	}
	cfg->gpio_reset = gpio;

	return 0;
}

2219
struct snd_ac97_bus_ops *soc_ac97_ops;
2220
EXPORT_SYMBOL_GPL(soc_ac97_ops);
2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235

int snd_soc_set_ac97_ops(struct snd_ac97_bus_ops *ops)
{
	if (ops == soc_ac97_ops)
		return 0;

	if (soc_ac97_ops && ops)
		return -EBUSY;

	soc_ac97_ops = ops;

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_set_ac97_ops);

2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264
/**
 * snd_soc_set_ac97_ops_of_reset - Set ac97 ops with generic ac97 reset functions
 *
 * This function sets the reset and warm_reset properties of ops and parses
 * the device node of pdev to get pinctrl states and gpio numbers to use.
 */
int snd_soc_set_ac97_ops_of_reset(struct snd_ac97_bus_ops *ops,
		struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct snd_ac97_reset_cfg cfg;
	int ret;

	ret = snd_soc_ac97_parse_pinctl(dev, &cfg);
	if (ret)
		return ret;

	ret = snd_soc_set_ac97_ops(ops);
	if (ret)
		return ret;

	ops->warm_reset = snd_soc_ac97_warm_reset;
	ops->reset = snd_soc_ac97_reset;

	snd_ac97_rst_cfg = cfg;
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_set_ac97_ops_of_reset);

F
Frank Mandarino 已提交
2265 2266 2267 2268 2269 2270 2271 2272 2273
/**
 * 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);
2274 2275 2276
#ifdef CONFIG_SND_SOC_AC97_BUS
	soc_unregister_ac97_dai_link(codec);
#endif
F
Frank Mandarino 已提交
2277 2278 2279
	kfree(codec->ac97->bus);
	kfree(codec->ac97);
	codec->ac97 = NULL;
2280
	codec->ac97_created = 0;
F
Frank Mandarino 已提交
2281 2282 2283 2284
	mutex_unlock(&codec->mutex);
}
EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);

2285 2286 2287 2288
unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
{
	unsigned int ret;

2289
	ret = codec->read(codec, reg);
2290
	dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
2291
	trace_snd_soc_reg_read(codec, reg, ret);
2292 2293 2294 2295 2296 2297 2298 2299 2300

	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);
2301
	trace_snd_soc_reg_write(codec, reg, val);
2302
	return codec->write(codec, reg, val);
2303 2304 2305
}
EXPORT_SYMBOL_GPL(snd_soc_write);

F
Frank Mandarino 已提交
2306 2307 2308 2309 2310 2311 2312 2313 2314
/**
 * snd_soc_update_bits - update codec register bits
 * @codec: audio codec
 * @reg: codec register
 * @mask: register mask
 * @value: new value
 *
 * Writes new register value.
 *
2315
 * Returns 1 for change, 0 for no change, or negative error code.
F
Frank Mandarino 已提交
2316 2317
 */
int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
2318
				unsigned int mask, unsigned int value)
F
Frank Mandarino 已提交
2319
{
2320
	bool change;
2321
	unsigned int old, new;
2322 2323
	int ret;

2324 2325 2326 2327 2328
	if (codec->using_regmap) {
		ret = regmap_update_bits_check(codec->control_data, reg,
					       mask, value, &change);
	} else {
		ret = snd_soc_read(codec, reg);
2329 2330
		if (ret < 0)
			return ret;
2331 2332 2333 2334 2335 2336

		old = ret;
		new = (old & ~mask) | (value & mask);
		change = old != new;
		if (change)
			ret = snd_soc_write(codec, reg, new);
2337
	}
F
Frank Mandarino 已提交
2338

2339 2340 2341
	if (ret < 0)
		return ret;

F
Frank Mandarino 已提交
2342 2343 2344 2345
	return change;
}
EXPORT_SYMBOL_GPL(snd_soc_update_bits);

2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356
/**
 * 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.
 */
2357 2358 2359
int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
			       unsigned short reg, unsigned int mask,
			       unsigned int value)
2360 2361 2362 2363 2364 2365 2366 2367 2368
{
	int change;

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

	return change;
}
2369
EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
2370

F
Frank Mandarino 已提交
2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383
/**
 * 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,
2384
				unsigned int mask, unsigned int value)
F
Frank Mandarino 已提交
2385 2386
{
	int change;
2387
	unsigned int old, new;
F
Frank Mandarino 已提交
2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400

	old = snd_soc_read(codec, reg);
	new = (old & ~mask) | value;
	change = old != new;

	return change;
}
EXPORT_SYMBOL_GPL(snd_soc_test_bits);

/**
 * snd_soc_cnew - create new control
 * @_template: control template
 * @data: control private data
M
Mark Brown 已提交
2401
 * @long_name: control long name
2402
 * @prefix: control name prefix
F
Frank Mandarino 已提交
2403 2404 2405 2406 2407 2408
 *
 * 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,
2409
				  void *data, const char *long_name,
2410
				  const char *prefix)
F
Frank Mandarino 已提交
2411 2412
{
	struct snd_kcontrol_new template;
2413 2414
	struct snd_kcontrol *kcontrol;
	char *name = NULL;
F
Frank Mandarino 已提交
2415 2416 2417 2418

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

2419 2420 2421 2422
	if (!long_name)
		long_name = template.name;

	if (prefix) {
2423
		name = kasprintf(GFP_KERNEL, "%s %s", prefix, long_name);
2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436
		if (!name)
			return NULL;

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

	kcontrol = snd_ctl_new1(&template, data);

	kfree(name);

	return kcontrol;
F
Frank Mandarino 已提交
2437 2438 2439
}
EXPORT_SYMBOL_GPL(snd_soc_cnew);

2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450
static int snd_soc_add_controls(struct snd_card *card, struct device *dev,
	const struct snd_kcontrol_new *controls, int num_controls,
	const char *prefix, void *data)
{
	int err, i;

	for (i = 0; i < num_controls; i++) {
		const struct snd_kcontrol_new *control = &controls[i];
		err = snd_ctl_add(card, snd_soc_cnew(control, data,
						     control->name, prefix));
		if (err < 0) {
2451 2452
			dev_err(dev, "ASoC: Failed to add %s: %d\n",
				control->name, err);
2453 2454 2455 2456 2457 2458 2459
			return err;
		}
	}

	return 0;
}

2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475
struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
					       const char *name)
{
	struct snd_card *card = soc_card->snd_card;
	struct snd_kcontrol *kctl;

	if (unlikely(!name))
		return NULL;

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

I
Ian Molton 已提交
2476
/**
2477 2478
 * snd_soc_add_codec_controls - add an array of controls to a codec.
 * Convenience function to add a list of controls. Many codecs were
I
Ian Molton 已提交
2479 2480 2481 2482 2483 2484 2485 2486
 * 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.
 */
2487
int snd_soc_add_codec_controls(struct snd_soc_codec *codec,
I
Ian Molton 已提交
2488 2489
	const struct snd_kcontrol_new *controls, int num_controls)
{
2490
	struct snd_card *card = codec->card->snd_card;
I
Ian Molton 已提交
2491

2492 2493
	return snd_soc_add_controls(card, codec->dev, controls, num_controls,
			codec->name_prefix, codec);
I
Ian Molton 已提交
2494
}
2495
EXPORT_SYMBOL_GPL(snd_soc_add_codec_controls);
I
Ian Molton 已提交
2496

2497 2498
/**
 * snd_soc_add_platform_controls - add an array of controls to a platform.
2499
 * Convenience function to add a list of controls.
2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511
 *
 * @platform: platform to add controls to
 * @controls: array of controls to add
 * @num_controls: number of elements in the array
 *
 * Return 0 for success, else error.
 */
int snd_soc_add_platform_controls(struct snd_soc_platform *platform,
	const struct snd_kcontrol_new *controls, int num_controls)
{
	struct snd_card *card = platform->card->snd_card;

2512 2513
	return snd_soc_add_controls(card, platform->dev, controls, num_controls,
			NULL, platform);
2514 2515 2516
}
EXPORT_SYMBOL_GPL(snd_soc_add_platform_controls);

2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556
/**
 * snd_soc_add_card_controls - add an array of controls to a SoC card.
 * Convenience function to add a list of controls.
 *
 * @soc_card: SoC card to add controls to
 * @controls: array of controls to add
 * @num_controls: number of elements in the array
 *
 * Return 0 for success, else error.
 */
int snd_soc_add_card_controls(struct snd_soc_card *soc_card,
	const struct snd_kcontrol_new *controls, int num_controls)
{
	struct snd_card *card = soc_card->snd_card;

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

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

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

F
Frank Mandarino 已提交
2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573
/**
 * 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;
2574
	uinfo->value.enumerated.items = e->items;
F
Frank Mandarino 已提交
2575

2576 2577
	if (uinfo->value.enumerated.item >= e->items)
		uinfo->value.enumerated.item = e->items - 1;
2578 2579 2580
	strlcpy(uinfo->value.enumerated.name,
		e->texts[uinfo->value.enumerated.item],
		sizeof(uinfo->value.enumerated.name));
F
Frank Mandarino 已提交
2581 2582 2583 2584 2585 2586 2587
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);

/**
 * snd_soc_get_enum_double - enumerated double mixer get callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2588
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2589 2590 2591 2592 2593 2594 2595 2596 2597 2598
 *
 * 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;
2599
	unsigned int val;
F
Frank Mandarino 已提交
2600 2601

	val = snd_soc_read(codec, e->reg);
2602
	ucontrol->value.enumerated.item[0]
2603
		= (val >> e->shift_l) & e->mask;
F
Frank Mandarino 已提交
2604 2605
	if (e->shift_l != e->shift_r)
		ucontrol->value.enumerated.item[1] =
2606
			(val >> e->shift_r) & e->mask;
F
Frank Mandarino 已提交
2607 2608 2609 2610 2611 2612 2613 2614

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);

/**
 * snd_soc_put_enum_double - enumerated double mixer put callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2615
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2616 2617 2618 2619 2620 2621 2622 2623 2624 2625
 *
 * 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;
2626
	unsigned int val;
2627
	unsigned int mask;
F
Frank Mandarino 已提交
2628

2629
	if (ucontrol->value.enumerated.item[0] >= e->items)
F
Frank Mandarino 已提交
2630 2631
		return -EINVAL;
	val = ucontrol->value.enumerated.item[0] << e->shift_l;
2632
	mask = e->mask << e->shift_l;
F
Frank Mandarino 已提交
2633
	if (e->shift_l != e->shift_r) {
2634
		if (ucontrol->value.enumerated.item[1] >= e->items)
F
Frank Mandarino 已提交
2635 2636
			return -EINVAL;
		val |= ucontrol->value.enumerated.item[1] << e->shift_r;
2637
		mask |= e->mask << e->shift_r;
F
Frank Mandarino 已提交
2638 2639
	}

2640
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
F
Frank Mandarino 已提交
2641 2642 2643
}
EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);

P
Peter Ujfalusi 已提交
2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659
/**
 * 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);
2660
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2661
	unsigned int reg_val, val, mux;
P
Peter Ujfalusi 已提交
2662 2663 2664

	reg_val = snd_soc_read(codec, e->reg);
	val = (reg_val >> e->shift_l) & e->mask;
2665
	for (mux = 0; mux < e->items; mux++) {
P
Peter Ujfalusi 已提交
2666 2667 2668 2669 2670 2671
		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;
2672
		for (mux = 0; mux < e->items; mux++) {
P
Peter Ujfalusi 已提交
2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698
			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);
2699
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2700 2701
	unsigned int val;
	unsigned int mask;
P
Peter Ujfalusi 已提交
2702

2703
	if (ucontrol->value.enumerated.item[0] >= e->items)
P
Peter Ujfalusi 已提交
2704 2705 2706 2707
		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) {
2708
		if (ucontrol->value.enumerated.item[1] >= e->items)
P
Peter Ujfalusi 已提交
2709 2710 2711 2712 2713
			return -EINVAL;
		val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
		mask |= e->mask << e->shift_r;
	}

2714
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
P
Peter Ujfalusi 已提交
2715 2716 2717
}
EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);

2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759
/**
 * snd_soc_read_signed - Read a codec register and interprete as signed value
 * @codec: codec
 * @reg: Register to read
 * @mask: Mask to use after shifting the register value
 * @shift: Right shift of register value
 * @sign_bit: Bit that describes if a number is negative or not.
 *
 * This functions reads a codec register. The register value is shifted right
 * by 'shift' bits and masked with the given 'mask'. Afterwards it translates
 * the given registervalue into a signed integer if sign_bit is non-zero.
 *
 * Returns the register value as signed int.
 */
static int snd_soc_read_signed(struct snd_soc_codec *codec, unsigned int reg,
		unsigned int mask, unsigned int shift, unsigned int sign_bit)
{
	int ret;
	unsigned int val;

	val = (snd_soc_read(codec, reg) >> shift) & mask;

	if (!sign_bit)
		return val;

	/* non-negative number */
	if (!(val & BIT(sign_bit)))
		return val;

	ret = val;

	/*
	 * The register most probably does not contain a full-sized int.
	 * Instead we have an arbitrary number of bits in a signed
	 * representation which has to be translated into a full-sized int.
	 * This is done by filling up all bits above the sign-bit.
	 */
	ret |= ~((int)(BIT(sign_bit) - 1));

	return ret;
}

F
Frank Mandarino 已提交
2760 2761 2762 2763 2764
/**
 * snd_soc_info_volsw - single mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
2765 2766
 * Callback to provide information about a single mixer control, or a double
 * mixer control that spans 2 registers.
F
Frank Mandarino 已提交
2767 2768 2769 2770 2771 2772
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
2773 2774
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2775
	int platform_max;
F
Frank Mandarino 已提交
2776

2777 2778 2779 2780 2781
	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
2782 2783 2784 2785
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;

2786
	uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
F
Frank Mandarino 已提交
2787
	uinfo->value.integer.min = 0;
2788
	uinfo->value.integer.max = platform_max - mc->min;
F
Frank Mandarino 已提交
2789 2790 2791 2792 2793 2794 2795
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw);

/**
 * snd_soc_get_volsw - single mixer get callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2796
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2797
 *
2798 2799
 * Callback to get the value of a single mixer control, or a double mixer
 * control that spans 2 registers.
F
Frank Mandarino 已提交
2800 2801 2802 2803 2804 2805
 *
 * Returns 0 for success.
 */
int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2806 2807
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2808
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2809
	unsigned int reg = mc->reg;
2810
	unsigned int reg2 = mc->rreg;
2811 2812
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
2813
	int max = mc->max;
2814 2815
	int min = mc->min;
	int sign_bit = mc->sign_bit;
2816 2817
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2818

2819 2820 2821 2822 2823
	if (sign_bit)
		mask = BIT(sign_bit + 1) - 1;

	ucontrol->value.integer.value[0] = snd_soc_read_signed(codec, reg, mask,
			shift, sign_bit) - min;
2824
	if (invert)
F
Frank Mandarino 已提交
2825
		ucontrol->value.integer.value[0] =
P
Philipp Zabel 已提交
2826
			max - ucontrol->value.integer.value[0];
2827 2828 2829 2830

	if (snd_soc_volsw_is_stereo(mc)) {
		if (reg == reg2)
			ucontrol->value.integer.value[1] =
2831 2832
				snd_soc_read_signed(codec, reg, mask, rshift,
						sign_bit) - min;
2833 2834
		else
			ucontrol->value.integer.value[1] =
2835 2836
				snd_soc_read_signed(codec, reg2, mask, shift,
						sign_bit) - min;
2837
		if (invert)
F
Frank Mandarino 已提交
2838
			ucontrol->value.integer.value[1] =
P
Philipp Zabel 已提交
2839
				max - ucontrol->value.integer.value[1];
F
Frank Mandarino 已提交
2840 2841 2842 2843 2844 2845 2846 2847 2848
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw);

/**
 * snd_soc_put_volsw - single mixer put callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2849
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2850
 *
2851 2852
 * Callback to set the value of a single mixer control, or a double mixer
 * control that spans 2 registers.
F
Frank Mandarino 已提交
2853 2854 2855 2856 2857 2858
 *
 * Returns 0 for success.
 */
int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2859 2860
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2861
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2862
	unsigned int reg = mc->reg;
2863
	unsigned int reg2 = mc->rreg;
2864 2865
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
2866
	int max = mc->max;
2867 2868
	int min = mc->min;
	unsigned int sign_bit = mc->sign_bit;
2869 2870
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
2871 2872 2873 2874
	int err;
	bool type_2r = 0;
	unsigned int val2 = 0;
	unsigned int val, val_mask;
F
Frank Mandarino 已提交
2875

2876 2877 2878 2879
	if (sign_bit)
		mask = BIT(sign_bit + 1) - 1;

	val = ((ucontrol->value.integer.value[0] + min) & mask);
F
Frank Mandarino 已提交
2880
	if (invert)
P
Philipp Zabel 已提交
2881
		val = max - val;
F
Frank Mandarino 已提交
2882 2883
	val_mask = mask << shift;
	val = val << shift;
2884
	if (snd_soc_volsw_is_stereo(mc)) {
2885
		val2 = ((ucontrol->value.integer.value[1] + min) & mask);
F
Frank Mandarino 已提交
2886
		if (invert)
P
Philipp Zabel 已提交
2887
			val2 = max - val2;
2888 2889 2890 2891 2892 2893 2894
		if (reg == reg2) {
			val_mask |= mask << rshift;
			val |= val2 << rshift;
		} else {
			val2 = val2 << shift;
			type_2r = 1;
		}
F
Frank Mandarino 已提交
2895
	}
2896
	err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2897
	if (err < 0)
F
Frank Mandarino 已提交
2898 2899
		return err;

2900 2901 2902
	if (type_2r)
		err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);

F
Frank Mandarino 已提交
2903 2904
	return err;
}
2905
EXPORT_SYMBOL_GPL(snd_soc_put_volsw);
F
Frank Mandarino 已提交
2906

2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965
/**
 * snd_soc_get_volsw_sx - single mixer get callback
 * @kcontrol: mixer control
 * @ucontrol: control element information
 *
 * Callback to get the value of a single mixer control, or a double mixer
 * control that spans 2 registers.
 *
 * Returns 0 for success.
 */
int snd_soc_get_volsw_sx(struct snd_kcontrol *kcontrol,
		      struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct soc_mixer_control *mc =
	    (struct soc_mixer_control *)kcontrol->private_value;

	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
	int max = mc->max;
	int min = mc->min;
	int mask = (1 << (fls(min + max) - 1)) - 1;

	ucontrol->value.integer.value[0] =
	    ((snd_soc_read(codec, reg) >> shift) - min) & mask;

	if (snd_soc_volsw_is_stereo(mc))
		ucontrol->value.integer.value[1] =
			((snd_soc_read(codec, reg2) >> rshift) - min) & mask;

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_sx);

/**
 * snd_soc_put_volsw_sx - double mixer set callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to set the value of a double mixer control that spans 2 registers.
 *
 * Returns 0 for success.
 */
int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol,
			 struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct soc_mixer_control *mc =
	    (struct soc_mixer_control *)kcontrol->private_value;

	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
	int max = mc->max;
	int min = mc->min;
	int mask = (1 << (fls(min + max) - 1)) - 1;
2966
	int err = 0;
2967 2968 2969 2970 2971 2972
	unsigned short val, val_mask, val2 = 0;

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

2973 2974 2975
	err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
	if (err < 0)
		return err;
2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988

	if (snd_soc_volsw_is_stereo(mc)) {
		val_mask = mask << rshift;
		val2 = (ucontrol->value.integer.value[1] + min) & mask;
		val2 = val2 << rshift;

		if (snd_soc_update_bits_locked(codec, reg2, val_mask, val2))
			return err;
	}
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_sx);

2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000
/**
 * 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)
{
3001 3002
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
3003
	int platform_max;
3004
	int min = mc->min;
3005

3006 3007 3008 3009
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

3010 3011 3012
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
3013
	uinfo->value.integer.max = platform_max - min;
3014 3015 3016 3017 3018 3019 3020
	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
3021
 * @ucontrol: control element information
3022 3023 3024 3025 3026 3027 3028 3029
 *
 * 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)
{
3030 3031
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
3032
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3033
	unsigned int reg = mc->reg;
3034
	int min = mc->min;
3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047
	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
3048
 * @ucontrol: control element information
3049 3050 3051 3052 3053 3054 3055 3056
 *
 * 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)
{
3057 3058
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
3059
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3060
	unsigned int reg = mc->reg;
3061
	int min = mc->min;
3062
	unsigned int val;
3063 3064 3065 3066

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

3067
	return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
3068 3069 3070
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);

3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093
/**
 * snd_soc_info_volsw_range - single mixer info callback with range.
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information, within a range, about a single
 * mixer control.
 *
 * returns 0 for success.
 */
int snd_soc_info_volsw_range(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int platform_max;
	int min = mc->min;

	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
3094
	uinfo->count = snd_soc_volsw_is_stereo(mc) ? 2 : 1;
3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = platform_max - min;

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_range);

/**
 * snd_soc_put_volsw_range - single mixer put value callback with range.
 * @kcontrol: mixer control
 * @ucontrol: control element information
 *
 * Callback to set the value, within a range, for a single mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_put_volsw_range(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 reg = mc->reg;
3118
	unsigned int rreg = mc->rreg;
3119 3120 3121 3122 3123 3124
	unsigned int shift = mc->shift;
	int min = mc->min;
	int max = mc->max;
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
	unsigned int val, val_mask;
3125
	int ret;
3126 3127 3128 3129 3130 3131 3132

	val = ((ucontrol->value.integer.value[0] + min) & mask);
	if (invert)
		val = max - val;
	val_mask = mask << shift;
	val = val << shift;

3133
	ret = snd_soc_update_bits_locked(codec, reg, val_mask, val);
3134
	if (ret < 0)
3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147
		return ret;

	if (snd_soc_volsw_is_stereo(mc)) {
		val = ((ucontrol->value.integer.value[1] + min) & mask);
		if (invert)
			val = max - val;
		val_mask = mask << shift;
		val = val << shift;

		ret = snd_soc_update_bits_locked(codec, rreg, val_mask, val);
	}

	return ret;
3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_range);

/**
 * snd_soc_get_volsw_range - single mixer get callback with range
 * @kcontrol: mixer control
 * @ucontrol: control element information
 *
 * Callback to get the value, within a range, of a single mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_get_volsw_range(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 reg = mc->reg;
3167
	unsigned int rreg = mc->rreg;
3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181
	unsigned int shift = mc->shift;
	int min = mc->min;
	int max = mc->max;
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;

	ucontrol->value.integer.value[0] =
		(snd_soc_read(codec, reg) >> shift) & mask;
	if (invert)
		ucontrol->value.integer.value[0] =
			max - ucontrol->value.integer.value[0];
	ucontrol->value.integer.value[0] =
		ucontrol->value.integer.value[0] - min;

3182 3183 3184 3185 3186 3187 3188 3189 3190 3191
	if (snd_soc_volsw_is_stereo(mc)) {
		ucontrol->value.integer.value[1] =
			(snd_soc_read(codec, rreg) >> shift) & mask;
		if (invert)
			ucontrol->value.integer.value[1] =
				max - ucontrol->value.integer.value[1];
		ucontrol->value.integer.value[1] =
			ucontrol->value.integer.value[1] - min;
	}

3192 3193 3194 3195
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_range);

3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207
/**
 * 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)
{
3208
	struct snd_card *card = codec->card->snd_card;
3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226
	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) {
3227
			mc->platform_max = max;
3228 3229 3230 3231 3232 3233 3234
			ret = 0;
		}
	}
	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_limit_volume);

3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261
int snd_soc_bytes_info(struct snd_kcontrol *kcontrol,
		       struct snd_ctl_elem_info *uinfo)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct soc_bytes *params = (void *)kcontrol->private_value;

	uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
	uinfo->count = params->num_regs * codec->val_bytes;

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_bytes_info);

int snd_soc_bytes_get(struct snd_kcontrol *kcontrol,
		      struct snd_ctl_elem_value *ucontrol)
{
	struct soc_bytes *params = (void *)kcontrol->private_value;
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	int ret;

	if (codec->using_regmap)
		ret = regmap_raw_read(codec->control_data, params->base,
				      ucontrol->value.bytes.data,
				      params->num_regs * codec->val_bytes);
	else
		ret = -EINVAL;

3262 3263 3264 3265 3266 3267 3268 3269
	/* Hide any masked bytes to ensure consistent data reporting */
	if (ret == 0 && params->mask) {
		switch (codec->val_bytes) {
		case 1:
			ucontrol->value.bytes.data[0] &= ~params->mask;
			break;
		case 2:
			((u16 *)(&ucontrol->value.bytes.data))[0]
3270
				&= cpu_to_be16(~params->mask);
3271 3272 3273
			break;
		case 4:
			((u32 *)(&ucontrol->value.bytes.data))[0]
3274
				&= cpu_to_be32(~params->mask);
3275 3276 3277 3278 3279 3280
			break;
		default:
			return -EINVAL;
		}
	}

3281 3282 3283 3284 3285 3286 3287 3288 3289
	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_bytes_get);

int snd_soc_bytes_put(struct snd_kcontrol *kcontrol,
		      struct snd_ctl_elem_value *ucontrol)
{
	struct soc_bytes *params = (void *)kcontrol->private_value;
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
3290 3291 3292
	int ret, len;
	unsigned int val;
	void *data;
3293

3294 3295 3296 3297 3298
	if (!codec->using_regmap)
		return -EINVAL;

	len = params->num_regs * codec->val_bytes;

3299 3300 3301 3302
	data = kmemdup(ucontrol->value.bytes.data, len, GFP_KERNEL | GFP_DMA);
	if (!data)
		return -ENOMEM;

3303 3304 3305 3306 3307 3308 3309 3310
	/*
	 * If we've got a mask then we need to preserve the register
	 * bits.  We shouldn't modify the incoming data so take a
	 * copy.
	 */
	if (params->mask) {
		ret = regmap_read(codec->control_data, params->base, &val);
		if (ret != 0)
3311
			goto out;
3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328

		val &= params->mask;

		switch (codec->val_bytes) {
		case 1:
			((u8 *)data)[0] &= ~params->mask;
			((u8 *)data)[0] |= val;
			break;
		case 2:
			((u16 *)data)[0] &= cpu_to_be16(~params->mask);
			((u16 *)data)[0] |= cpu_to_be16(val);
			break;
		case 4:
			((u32 *)data)[0] &= cpu_to_be32(~params->mask);
			((u32 *)data)[0] |= cpu_to_be32(val);
			break;
		default:
3329 3330
			ret = -EINVAL;
			goto out;
3331 3332 3333 3334 3335 3336
		}
	}

	ret = regmap_raw_write(codec->control_data, params->base,
			       data, len);

3337
out:
3338
	kfree(data);
3339 3340 3341 3342 3343

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_bytes_put);

3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460
/**
 * snd_soc_info_xr_sx - signed multi register info callback
 * @kcontrol: mreg control
 * @uinfo: control element information
 *
 * Callback to provide information of a control that can
 * span multiple codec registers which together
 * forms a single signed value in a MSB/LSB manner.
 *
 * Returns 0 for success.
 */
int snd_soc_info_xr_sx(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
	struct soc_mreg_control *mc =
		(struct soc_mreg_control *)kcontrol->private_value;
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 1;
	uinfo->value.integer.min = mc->min;
	uinfo->value.integer.max = mc->max;

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_xr_sx);

/**
 * snd_soc_get_xr_sx - signed multi register get callback
 * @kcontrol: mreg control
 * @ucontrol: control element information
 *
 * Callback to get the value of a control that can span
 * multiple codec registers which together forms a single
 * signed value in a MSB/LSB manner. The control supports
 * specifying total no of bits used to allow for bitfields
 * across the multiple codec registers.
 *
 * Returns 0 for success.
 */
int snd_soc_get_xr_sx(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mreg_control *mc =
		(struct soc_mreg_control *)kcontrol->private_value;
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	unsigned int regbase = mc->regbase;
	unsigned int regcount = mc->regcount;
	unsigned int regwshift = codec->driver->reg_word_size * BITS_PER_BYTE;
	unsigned int regwmask = (1<<regwshift)-1;
	unsigned int invert = mc->invert;
	unsigned long mask = (1UL<<mc->nbits)-1;
	long min = mc->min;
	long max = mc->max;
	long val = 0;
	unsigned long regval;
	unsigned int i;

	for (i = 0; i < regcount; i++) {
		regval = snd_soc_read(codec, regbase+i) & regwmask;
		val |= regval << (regwshift*(regcount-i-1));
	}
	val &= mask;
	if (min < 0 && val > max)
		val |= ~mask;
	if (invert)
		val = max - val;
	ucontrol->value.integer.value[0] = val;

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_xr_sx);

/**
 * snd_soc_put_xr_sx - signed multi register get callback
 * @kcontrol: mreg control
 * @ucontrol: control element information
 *
 * Callback to set the value of a control that can span
 * multiple codec registers which together forms a single
 * signed value in a MSB/LSB manner. The control supports
 * specifying total no of bits used to allow for bitfields
 * across the multiple codec registers.
 *
 * Returns 0 for success.
 */
int snd_soc_put_xr_sx(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mreg_control *mc =
		(struct soc_mreg_control *)kcontrol->private_value;
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	unsigned int regbase = mc->regbase;
	unsigned int regcount = mc->regcount;
	unsigned int regwshift = codec->driver->reg_word_size * BITS_PER_BYTE;
	unsigned int regwmask = (1<<regwshift)-1;
	unsigned int invert = mc->invert;
	unsigned long mask = (1UL<<mc->nbits)-1;
	long max = mc->max;
	long val = ucontrol->value.integer.value[0];
	unsigned int i, regval, regmask;
	int err;

	if (invert)
		val = max - val;
	val &= mask;
	for (i = 0; i < regcount; i++) {
		regval = (val >> (regwshift*(regcount-i-1))) & regwmask;
		regmask = (mask >> (regwshift*(regcount-i-1))) & regwmask;
		err = snd_soc_update_bits_locked(codec, regbase+i,
				regmask, regval);
		if (err < 0)
			return err;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_put_xr_sx);

3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523
/**
 * snd_soc_get_strobe - strobe get callback
 * @kcontrol: mixer control
 * @ucontrol: control element information
 *
 * Callback get the value of a strobe mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_get_strobe(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 reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int mask = 1 << shift;
	unsigned int invert = mc->invert != 0;
	unsigned int val = snd_soc_read(codec, reg) & mask;

	if (shift != 0 && val != 0)
		val = val >> shift;
	ucontrol->value.enumerated.item[0] = val ^ invert;

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_strobe);

/**
 * snd_soc_put_strobe - strobe put callback
 * @kcontrol: mixer control
 * @ucontrol: control element information
 *
 * Callback strobe a register bit to high then low (or the inverse)
 * in one pass of a single mixer enum control.
 *
 * Returns 1 for success.
 */
int snd_soc_put_strobe(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 reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int mask = 1 << shift;
	unsigned int invert = mc->invert != 0;
	unsigned int strobe = ucontrol->value.enumerated.item[0] != 0;
	unsigned int val1 = (strobe ^ invert) ? mask : 0;
	unsigned int val2 = (strobe ^ invert) ? 0 : mask;
	int err;

	err = snd_soc_update_bits_locked(codec, reg, mask, val1);
	if (err < 0)
		return err;

	err = snd_soc_update_bits_locked(codec, reg, mask, val2);
	return err;
}
EXPORT_SYMBOL_GPL(snd_soc_put_strobe);

3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535
/**
 * 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)
{
3536 3537
	if (dai->driver && dai->driver->ops->set_sysclk)
		return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
3538
	else if (dai->codec && dai->codec->driver->set_sysclk)
3539
		return dai->codec->driver->set_sysclk(dai->codec, clk_id, 0,
3540
						      freq, dir);
3541
	else
3542
		return -ENOTSUPP;
3543 3544 3545
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);

3546 3547 3548 3549
/**
 * snd_soc_codec_set_sysclk - configure CODEC system or master clock.
 * @codec: CODEC
 * @clk_id: DAI specific clock ID
3550
 * @source: Source for the clock
3551 3552 3553 3554 3555 3556
 * @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,
3557
			     int source, unsigned int freq, int dir)
3558 3559
{
	if (codec->driver->set_sysclk)
3560 3561
		return codec->driver->set_sysclk(codec, clk_id, source,
						 freq, dir);
3562
	else
3563
		return -ENOTSUPP;
3564 3565 3566
}
EXPORT_SYMBOL_GPL(snd_soc_codec_set_sysclk);

3567 3568 3569
/**
 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
 * @dai: DAI
M
Mark Brown 已提交
3570
 * @div_id: DAI specific clock divider ID
3571 3572 3573 3574 3575 3576 3577 3578 3579
 * @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)
{
3580 3581
	if (dai->driver && dai->driver->ops->set_clkdiv)
		return dai->driver->ops->set_clkdiv(dai, div_id, div);
3582 3583 3584 3585 3586 3587 3588 3589 3590
	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
3591
 * @source: DAI specific source for the PLL
3592 3593 3594 3595 3596
 * @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.
 */
3597 3598
int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
	unsigned int freq_in, unsigned int freq_out)
3599
{
3600 3601
	if (dai->driver && dai->driver->ops->set_pll)
		return dai->driver->ops->set_pll(dai, pll_id, source,
3602
					 freq_in, freq_out);
3603 3604 3605
	else if (dai->codec && dai->codec->driver->set_pll)
		return dai->codec->driver->set_pll(dai->codec, pll_id, source,
						   freq_in, freq_out);
3606 3607 3608 3609 3610
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);

3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631
/*
 * 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);

3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647
/**
 * snd_soc_dai_set_bclk_ratio - configure BCLK to sample rate ratio.
 * @dai: DAI
 * @ratio Ratio of BCLK to Sample rate.
 *
 * Configures the DAI for a preset BCLK to sample rate ratio.
 */
int snd_soc_dai_set_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
{
	if (dai->driver && dai->driver->ops->set_bclk_ratio)
		return dai->driver->ops->set_bclk_ratio(dai, ratio);
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_bclk_ratio);

3648 3649 3650 3651 3652 3653 3654 3655 3656
/**
 * 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)
{
3657
	if (dai->driver == NULL)
3658
		return -EINVAL;
3659 3660 3661
	if (dai->driver->ops->set_fmt == NULL)
		return -ENOTSUPP;
	return dai->driver->ops->set_fmt(dai, fmt);
3662 3663 3664 3665 3666 3667
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);

/**
 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
 * @dai: DAI
3668 3669
 * @tx_mask: bitmask representing active TX slots.
 * @rx_mask: bitmask representing active RX slots.
3670
 * @slots: Number of slots in use.
3671
 * @slot_width: Width in bits for each slot.
3672 3673 3674 3675 3676
 *
 * 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,
3677
	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
3678
{
3679 3680
	if (dai->driver && dai->driver->ops->set_tdm_slot)
		return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
3681
				slots, slot_width);
3682 3683 3684 3685 3686
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);

3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702
/**
 * 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)
{
3703 3704
	if (dai->driver && dai->driver->ops->set_channel_map)
		return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
3705 3706 3707 3708 3709 3710
			rx_num, rx_slot);
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);

3711 3712 3713 3714 3715 3716 3717 3718 3719
/**
 * 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)
{
3720 3721
	if (dai->driver && dai->driver->ops->set_tristate)
		return dai->driver->ops->set_tristate(dai, tristate);
3722 3723 3724 3725 3726 3727 3728 3729 3730
	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
3731
 * @direction: stream to mute
3732 3733 3734
 *
 * Mutes the DAI DAC.
 */
3735 3736
int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute,
			     int direction)
3737
{
3738 3739 3740 3741 3742 3743 3744
	if (!dai->driver)
		return -ENOTSUPP;

	if (dai->driver->ops->mute_stream)
		return dai->driver->ops->mute_stream(dai, mute, direction);
	else if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
		 dai->driver->ops->digital_mute)
3745
		return dai->driver->ops->digital_mute(dai, mute);
3746
	else
3747
		return -ENOTSUPP;
3748 3749 3750
}
EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);

M
Mark Brown 已提交
3751 3752 3753
/**
 * snd_soc_register_card - Register a card with the ASoC core
 *
M
Mark Brown 已提交
3754
 * @card: Card to register
M
Mark Brown 已提交
3755 3756
 *
 */
3757
int snd_soc_register_card(struct snd_soc_card *card)
M
Mark Brown 已提交
3758
{
3759
	int i, ret;
3760

M
Mark Brown 已提交
3761 3762 3763
	if (!card->name || !card->dev)
		return -EINVAL;

3764 3765 3766 3767 3768 3769 3770 3771
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai_link *link = &card->dai_link[i];

		/*
		 * Codec must be specified by 1 of name or OF node,
		 * not both or neither.
		 */
		if (!!link->codec_name == !!link->codec_of_node) {
3772 3773 3774
			dev_err(card->dev,
				"ASoC: Neither/both codec name/of_node are set for %s\n",
				link->name);
3775 3776
			return -EINVAL;
		}
3777 3778
		/* Codec DAI name must be specified */
		if (!link->codec_dai_name) {
3779 3780 3781
			dev_err(card->dev,
				"ASoC: codec_dai_name not set for %s\n",
				link->name);
3782 3783
			return -EINVAL;
		}
3784 3785 3786 3787 3788 3789

		/*
		 * Platform may be specified by either name or OF node, but
		 * can be left unspecified, and a dummy platform will be used.
		 */
		if (link->platform_name && link->platform_of_node) {
3790 3791 3792
			dev_err(card->dev,
				"ASoC: Both platform name/of_node are set for %s\n",
				link->name);
3793 3794 3795 3796
			return -EINVAL;
		}

		/*
3797 3798 3799 3800 3801
		 * CPU device may be specified by either name or OF node, but
		 * can be left unspecified, and will be matched based on DAI
		 * name alone..
		 */
		if (link->cpu_name && link->cpu_of_node) {
3802 3803 3804
			dev_err(card->dev,
				"ASoC: Neither/both cpu name/of_node are set for %s\n",
				link->name);
3805 3806 3807 3808 3809
			return -EINVAL;
		}
		/*
		 * At least one of CPU DAI name or CPU device name/node must be
		 * specified
3810
		 */
3811 3812
		if (!link->cpu_dai_name &&
		    !(link->cpu_name || link->cpu_of_node)) {
3813 3814 3815
			dev_err(card->dev,
				"ASoC: Neither cpu_dai_name nor cpu_name/of_node are set for %s\n",
				link->name);
3816 3817 3818 3819
			return -EINVAL;
		}
	}

M
Mark Brown 已提交
3820 3821
	dev_set_drvdata(card->dev, card);

3822 3823
	snd_soc_initialize_card_lists(card);

3824 3825
	soc_init_card_debugfs(card);

3826 3827 3828 3829
	card->rtd = devm_kzalloc(card->dev,
				 sizeof(struct snd_soc_pcm_runtime) *
				 (card->num_links + card->num_aux_devs),
				 GFP_KERNEL);
3830 3831
	if (card->rtd == NULL)
		return -ENOMEM;
3832
	card->num_rtd = 0;
3833
	card->rtd_aux = &card->rtd[card->num_links];
3834 3835 3836 3837

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

M
Mark Brown 已提交
3838
	INIT_LIST_HEAD(&card->list);
3839
	INIT_LIST_HEAD(&card->dapm_dirty);
M
Mark Brown 已提交
3840
	card->instantiated = 0;
3841
	mutex_init(&card->mutex);
3842
	mutex_init(&card->dapm_mutex);
M
Mark Brown 已提交
3843

3844 3845 3846
	ret = snd_soc_instantiate_card(card);
	if (ret != 0)
		soc_cleanup_card_debugfs(card);
M
Mark Brown 已提交
3847

3848 3849 3850 3851 3852 3853 3854 3855 3856 3857
	/* deactivate pins to sleep state */
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
		struct snd_soc_dai *codec_dai = card->rtd[i].codec_dai;
		if (!codec_dai->active)
			pinctrl_pm_select_sleep_state(codec_dai->dev);
		if (!cpu_dai->active)
			pinctrl_pm_select_sleep_state(cpu_dai->dev);
	}

3858
	return ret;
M
Mark Brown 已提交
3859
}
3860
EXPORT_SYMBOL_GPL(snd_soc_register_card);
M
Mark Brown 已提交
3861 3862 3863 3864

/**
 * snd_soc_unregister_card - Unregister a card with the ASoC core
 *
M
Mark Brown 已提交
3865
 * @card: Card to unregister
M
Mark Brown 已提交
3866 3867
 *
 */
3868
int snd_soc_unregister_card(struct snd_soc_card *card)
M
Mark Brown 已提交
3869
{
3870 3871
	if (card->instantiated)
		soc_cleanup_card_resources(card);
3872
	dev_dbg(card->dev, "ASoC: Unregistered card '%s'\n", card->name);
M
Mark Brown 已提交
3873 3874 3875

	return 0;
}
3876
EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
M
Mark Brown 已提交
3877

3878 3879 3880 3881
/*
 * Simplify DAI link configuration by removing ".-1" from device names
 * and sanitizing names.
 */
3882
static char *fmt_single_name(struct device *dev, int *id)
3883 3884 3885 3886 3887 3888 3889
{
	char *found, name[NAME_SIZE];
	int id1, id2;

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

3890
	strlcpy(name, dev_name(dev), NAME_SIZE);
3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908

	/* 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 */
3909
			*id = ((id1 & 0xffff) << 16) + id2;
3910 3911 3912

			/* sanitize component name for DAI link creation */
			snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
3913
			strlcpy(name, tmp, NAME_SIZE);
3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928
		} 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) {
3929 3930 3931
		dev_err(dev,
			"ASoC: error - multiple DAI %s registered with no name\n",
			dev_name(dev));
3932 3933 3934 3935 3936 3937
		return NULL;
	}

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

M
Mark Brown 已提交
3938 3939 3940
/**
 * snd_soc_register_dai - Register a DAI with the ASoC core
 *
M
Mark Brown 已提交
3941
 * @dai: DAI to register
M
Mark Brown 已提交
3942
 */
3943
static int snd_soc_register_dai(struct device *dev,
3944
		struct snd_soc_dai_driver *dai_drv)
M
Mark Brown 已提交
3945
{
3946
	struct snd_soc_codec *codec;
3947 3948
	struct snd_soc_dai *dai;

3949
	dev_dbg(dev, "ASoC: dai register %s\n", dev_name(dev));
M
Mark Brown 已提交
3950

3951 3952
	dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
	if (dai == NULL)
L
Lu Guanqun 已提交
3953
		return -ENOMEM;
M
Mark Brown 已提交
3954

3955 3956 3957 3958 3959 3960
	/* create DAI component name */
	dai->name = fmt_single_name(dev, &dai->id);
	if (dai->name == NULL) {
		kfree(dai);
		return -ENOMEM;
	}
3961

3962 3963
	dai->dev = dev;
	dai->driver = dai_drv;
3964
	dai->dapm.dev = dev;
3965 3966
	if (!dai->driver->ops)
		dai->driver->ops = &null_dai_ops;
M
Mark Brown 已提交
3967 3968

	mutex_lock(&client_mutex);
3969 3970 3971

	list_for_each_entry(codec, &codec_list, list) {
		if (codec->dev == dev) {
3972
			dev_dbg(dev, "ASoC: Mapped DAI %s to CODEC %s\n",
3973 3974 3975 3976 3977 3978
				dai->name, codec->name);
			dai->codec = codec;
			break;
		}
	}

3979 3980 3981
	if (!dai->codec)
		dai->dapm.idle_bias_off = 1;

M
Mark Brown 已提交
3982
	list_add(&dai->list, &dai_list);
3983

M
Mark Brown 已提交
3984 3985
	mutex_unlock(&client_mutex);

3986
	dev_dbg(dev, "ASoC: Registered DAI '%s'\n", dai->name);
M
Mark Brown 已提交
3987 3988 3989 3990 3991 3992 3993

	return 0;
}

/**
 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
 *
M
Mark Brown 已提交
3994
 * @dai: DAI to unregister
M
Mark Brown 已提交
3995
 */
3996
static void snd_soc_unregister_dai(struct device *dev)
M
Mark Brown 已提交
3997
{
3998 3999 4000 4001 4002 4003 4004 4005 4006
	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
4007 4008 4009 4010
	mutex_lock(&client_mutex);
	list_del(&dai->list);
	mutex_unlock(&client_mutex);

4011
	dev_dbg(dev, "ASoC: Unregistered DAI '%s'\n", dai->name);
4012 4013
	kfree(dai->name);
	kfree(dai);
M
Mark Brown 已提交
4014 4015 4016 4017 4018
}

/**
 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
 *
M
Mark Brown 已提交
4019 4020
 * @dai: Array of DAIs to register
 * @count: Number of DAIs
M
Mark Brown 已提交
4021
 */
4022
static int snd_soc_register_dais(struct device *dev,
4023
		struct snd_soc_dai_driver *dai_drv, size_t count)
M
Mark Brown 已提交
4024
{
4025
	struct snd_soc_codec *codec;
4026 4027 4028
	struct snd_soc_dai *dai;
	int i, ret = 0;

4029
	dev_dbg(dev, "ASoC: dai register %s #%Zu\n", dev_name(dev), count);
M
Mark Brown 已提交
4030 4031

	for (i = 0; i < count; i++) {
4032 4033

		dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
4034 4035 4036 4037
		if (dai == NULL) {
			ret = -ENOMEM;
			goto err;
		}
4038 4039 4040 4041 4042 4043

		/* 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
4044
			goto err;
4045 4046 4047 4048
		}

		dai->dev = dev;
		dai->driver = &dai_drv[i];
4049 4050 4051 4052
		if (dai->driver->id)
			dai->id = dai->driver->id;
		else
			dai->id = i;
4053
		dai->dapm.dev = dev;
4054 4055 4056 4057
		if (!dai->driver->ops)
			dai->driver->ops = &null_dai_ops;

		mutex_lock(&client_mutex);
4058 4059 4060

		list_for_each_entry(codec, &codec_list, list) {
			if (codec->dev == dev) {
4061 4062 4063
				dev_dbg(dev,
					"ASoC: Mapped DAI %s to CODEC %s\n",
					dai->name, codec->name);
4064 4065 4066 4067 4068
				dai->codec = codec;
				break;
			}
		}

4069 4070 4071
		if (!dai->codec)
			dai->dapm.idle_bias_off = 1;

4072
		list_add(&dai->list, &dai_list);
4073

4074 4075
		mutex_unlock(&client_mutex);

4076
		dev_dbg(dai->dev, "ASoC: Registered DAI '%s'\n", dai->name);
M
Mark Brown 已提交
4077 4078 4079 4080 4081 4082
	}

	return 0;

err:
	for (i--; i >= 0; i--)
4083
		snd_soc_unregister_dai(dev);
M
Mark Brown 已提交
4084 4085 4086 4087 4088 4089 4090

	return ret;
}

/**
 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
 *
M
Mark Brown 已提交
4091 4092
 * @dai: Array of DAIs to unregister
 * @count: Number of DAIs
M
Mark Brown 已提交
4093
 */
4094
static void snd_soc_unregister_dais(struct device *dev, size_t count)
M
Mark Brown 已提交
4095 4096 4097 4098
{
	int i;

	for (i = 0; i < count; i++)
4099
		snd_soc_unregister_dai(dev);
M
Mark Brown 已提交
4100 4101
}

4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129
/**
 * snd_soc_register_component - Register a component with the ASoC core
 *
 */
static int
__snd_soc_register_component(struct device *dev,
			     struct snd_soc_component *cmpnt,
			     const struct snd_soc_component_driver *cmpnt_drv,
			     struct snd_soc_dai_driver *dai_drv,
			     int num_dai, bool allow_single_dai)
{
	int ret;

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

	if (!cmpnt) {
		dev_err(dev, "ASoC: Failed to connecting component\n");
		return -ENOMEM;
	}

	cmpnt->name = fmt_single_name(dev, &cmpnt->id);
	if (!cmpnt->name) {
		dev_err(dev, "ASoC: Failed to simplifying name\n");
		return -ENOMEM;
	}

	cmpnt->dev	= dev;
	cmpnt->driver	= cmpnt_drv;
4130
	cmpnt->dai_drv	= dai_drv;
4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208
	cmpnt->num_dai	= num_dai;

	/*
	 * snd_soc_register_dai()  uses fmt_single_name(), and
	 * snd_soc_register_dais() uses fmt_multiple_name()
	 * for dai->name which is used for name based matching
	 *
	 * this function is used from cpu/codec.
	 * allow_single_dai flag can ignore "codec" driver reworking
	 * since it had been used snd_soc_register_dais(),
	 */
	if ((1 == num_dai) && allow_single_dai)
		ret = snd_soc_register_dai(dev, dai_drv);
	else
		ret = snd_soc_register_dais(dev, dai_drv, num_dai);
	if (ret < 0) {
		dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
		goto error_component_name;
	}

	mutex_lock(&client_mutex);
	list_add(&cmpnt->list, &component_list);
	mutex_unlock(&client_mutex);

	dev_dbg(cmpnt->dev, "ASoC: Registered component '%s'\n", cmpnt->name);

	return ret;

error_component_name:
	kfree(cmpnt->name);

	return ret;
}

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

	cmpnt = devm_kzalloc(dev, sizeof(*cmpnt), GFP_KERNEL);
	if (!cmpnt) {
		dev_err(dev, "ASoC: Failed to allocate memory\n");
		return -ENOMEM;
	}

	return __snd_soc_register_component(dev, cmpnt, cmpnt_drv,
					    dai_drv, num_dai, true);
}
EXPORT_SYMBOL_GPL(snd_soc_register_component);

/**
 * snd_soc_unregister_component - Unregister a component from the ASoC core
 *
 */
void snd_soc_unregister_component(struct device *dev)
{
	struct snd_soc_component *cmpnt;

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

found:
	snd_soc_unregister_dais(dev, cmpnt->num_dai);

	mutex_lock(&client_mutex);
	list_del(&cmpnt->list);
	mutex_unlock(&client_mutex);

	dev_dbg(dev, "ASoC: Unregistered component '%s'\n", cmpnt->name);
	kfree(cmpnt->name);
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_component);

M
Mark Brown 已提交
4209
/**
4210 4211 4212 4213
 * snd_soc_add_platform - Add a platform to the ASoC core
 * @dev: The parent device for the platform
 * @platform: The platform to add
 * @platform_driver: The driver for the platform
M
Mark Brown 已提交
4214
 */
4215
int snd_soc_add_platform(struct device *dev, struct snd_soc_platform *platform,
4216
		const struct snd_soc_platform_driver *platform_drv)
M
Mark Brown 已提交
4217
{
4218 4219
	/* create platform component name */
	platform->name = fmt_single_name(dev, &platform->id);
4220
	if (platform->name == NULL)
4221
		return -ENOMEM;
M
Mark Brown 已提交
4222

4223 4224
	platform->dev = dev;
	platform->driver = platform_drv;
4225 4226
	platform->dapm.dev = dev;
	platform->dapm.platform = platform;
4227
	platform->dapm.stream_event = platform_drv->stream_event;
4228
	mutex_init(&platform->mutex);
M
Mark Brown 已提交
4229 4230 4231 4232 4233

	mutex_lock(&client_mutex);
	list_add(&platform->list, &platform_list);
	mutex_unlock(&client_mutex);

4234
	dev_dbg(dev, "ASoC: Registered platform '%s'\n", platform->name);
M
Mark Brown 已提交
4235 4236 4237

	return 0;
}
4238
EXPORT_SYMBOL_GPL(snd_soc_add_platform);
M
Mark Brown 已提交
4239 4240

/**
4241
 * snd_soc_register_platform - Register a platform with the ASoC core
M
Mark Brown 已提交
4242
 *
4243
 * @platform: platform to register
M
Mark Brown 已提交
4244
 */
4245 4246
int snd_soc_register_platform(struct device *dev,
		const struct snd_soc_platform_driver *platform_drv)
M
Mark Brown 已提交
4247
{
4248
	struct snd_soc_platform *platform;
4249
	int ret;
4250

4251
	dev_dbg(dev, "ASoC: platform register %s\n", dev_name(dev));
4252

4253 4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270
	platform = kzalloc(sizeof(struct snd_soc_platform), GFP_KERNEL);
	if (platform == NULL)
		return -ENOMEM;

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

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_register_platform);

/**
 * snd_soc_remove_platform - Remove a platform from the ASoC core
 * @platform: the platform to remove
 */
void snd_soc_remove_platform(struct snd_soc_platform *platform)
{
M
Mark Brown 已提交
4271 4272 4273 4274
	mutex_lock(&client_mutex);
	list_del(&platform->list);
	mutex_unlock(&client_mutex);

4275 4276
	dev_dbg(platform->dev, "ASoC: Unregistered platform '%s'\n",
		platform->name);
4277
	kfree(platform->name);
4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306 4307
}
EXPORT_SYMBOL_GPL(snd_soc_remove_platform);

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

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

	return NULL;
}
EXPORT_SYMBOL_GPL(snd_soc_lookup_platform);

/**
 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
 *
 * @platform: platform to unregister
 */
void snd_soc_unregister_platform(struct device *dev)
{
	struct snd_soc_platform *platform;

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

	snd_soc_remove_platform(platform);
4308
	kfree(platform);
M
Mark Brown 已提交
4309 4310 4311
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);

4312 4313 4314 4315 4316 4317 4318 4319 4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335 4336 4337 4338 4339 4340 4341 4342 4343 4344
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
4345 4346 4347
/**
 * snd_soc_register_codec - Register a codec with the ASoC core
 *
M
Mark Brown 已提交
4348
 * @codec: codec to register
M
Mark Brown 已提交
4349
 */
4350
int snd_soc_register_codec(struct device *dev,
4351 4352 4353
			   const struct snd_soc_codec_driver *codec_drv,
			   struct snd_soc_dai_driver *dai_drv,
			   int num_dai)
M
Mark Brown 已提交
4354
{
4355 4356
	struct snd_soc_codec *codec;
	int ret, i;
4357

4358 4359 4360 4361 4362
	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
4363

4364 4365 4366
	/* create CODEC component name */
	codec->name = fmt_single_name(dev, &codec->id);
	if (codec->name == NULL) {
4367 4368
		ret = -ENOMEM;
		goto fail_codec;
4369 4370
	}

4371 4372
	codec->write = codec_drv->write;
	codec->read = codec_drv->read;
4373 4374
	codec->volatile_register = codec_drv->volatile_register;
	codec->readable_register = codec_drv->readable_register;
4375
	codec->writable_register = codec_drv->writable_register;
4376
	codec->ignore_pmdown_time = codec_drv->ignore_pmdown_time;
L
Liam Girdwood 已提交
4377 4378 4379
	codec->dapm.bias_level = SND_SOC_BIAS_OFF;
	codec->dapm.dev = dev;
	codec->dapm.codec = codec;
4380
	codec->dapm.seq_notifier = codec_drv->seq_notifier;
4381
	codec->dapm.stream_event = codec_drv->stream_event;
4382 4383 4384 4385
	codec->dev = dev;
	codec->driver = codec_drv;
	codec->num_dai = num_dai;
	mutex_init(&codec->mutex);
L
Liam Girdwood 已提交
4386

4387 4388 4389 4390 4391
	for (i = 0; i < num_dai; i++) {
		fixup_codec_formats(&dai_drv[i].playback);
		fixup_codec_formats(&dai_drv[i].capture);
	}

4392 4393 4394 4395
	mutex_lock(&client_mutex);
	list_add(&codec->list, &codec_list);
	mutex_unlock(&client_mutex);

4396 4397 4398 4399
	/* register component */
	ret = __snd_soc_register_component(dev, &codec->component,
					   &codec_drv->component_driver,
					   dai_drv, num_dai, false);
4400
	if (ret < 0) {
4401
		dev_err(codec->dev, "ASoC: Failed to regster component: %d\n", ret);
4402
		goto fail_codec_name;
4403
	}
4404

4405
	dev_dbg(codec->dev, "ASoC: Registered codec '%s'\n", codec->name);
M
Mark Brown 已提交
4406
	return 0;
4407

4408
fail_codec_name:
4409 4410 4411 4412
	mutex_lock(&client_mutex);
	list_del(&codec->list);
	mutex_unlock(&client_mutex);

4413
	kfree(codec->name);
4414
fail_codec:
4415 4416
	kfree(codec);
	return ret;
M
Mark Brown 已提交
4417 4418 4419 4420 4421 4422
}
EXPORT_SYMBOL_GPL(snd_soc_register_codec);

/**
 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
 *
M
Mark Brown 已提交
4423
 * @codec: codec to unregister
M
Mark Brown 已提交
4424
 */
4425
void snd_soc_unregister_codec(struct device *dev)
M
Mark Brown 已提交
4426
{
4427 4428 4429 4430 4431 4432 4433 4434 4435
	struct snd_soc_codec *codec;

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

found:
4436
	snd_soc_unregister_component(dev);
4437

M
Mark Brown 已提交
4438 4439 4440 4441
	mutex_lock(&client_mutex);
	list_del(&codec->list);
	mutex_unlock(&client_mutex);

4442
	dev_dbg(codec->dev, "ASoC: Unregistered codec '%s'\n", codec->name);
4443

4444
	snd_soc_cache_exit(codec);
4445
	kfree(codec->name);
4446
	kfree(codec);
M
Mark Brown 已提交
4447 4448 4449
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);

4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461 4462 4463 4464
/* Retrieve a card's name from device tree */
int snd_soc_of_parse_card_name(struct snd_soc_card *card,
			       const char *propname)
{
	struct device_node *np = card->dev->of_node;
	int ret;

	ret = of_property_read_string_index(np, propname, 0, &card->name);
	/*
	 * EINVAL means the property does not exist. This is fine providing
	 * card->name was previously set, which is checked later in
	 * snd_soc_register_card.
	 */
	if (ret < 0 && ret != -EINVAL) {
		dev_err(card->dev,
4465
			"ASoC: Property '%s' could not be read: %d\n",
4466 4467 4468 4469 4470 4471 4472 4473
			propname, ret);
		return ret;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);

4474 4475 4476 4477 4478 4479 4480 4481 4482
int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
				   const char *propname)
{
	struct device_node *np = card->dev->of_node;
	int num_routes;
	struct snd_soc_dapm_route *routes;
	int i, ret;

	num_routes = of_property_count_strings(np, propname);
4483
	if (num_routes < 0 || num_routes & 1) {
4484 4485 4486
		dev_err(card->dev,
			"ASoC: Property '%s' does not exist or its length is not even\n",
			propname);
4487 4488 4489 4490
		return -EINVAL;
	}
	num_routes /= 2;
	if (!num_routes) {
4491
		dev_err(card->dev, "ASoC: Property '%s's length is zero\n",
4492 4493 4494 4495 4496 4497 4498 4499
			propname);
		return -EINVAL;
	}

	routes = devm_kzalloc(card->dev, num_routes * sizeof(*routes),
			      GFP_KERNEL);
	if (!routes) {
		dev_err(card->dev,
4500
			"ASoC: Could not allocate DAPM route table\n");
4501 4502 4503 4504 4505 4506 4507
		return -EINVAL;
	}

	for (i = 0; i < num_routes; i++) {
		ret = of_property_read_string_index(np, propname,
			2 * i, &routes[i].sink);
		if (ret) {
4508 4509 4510
			dev_err(card->dev,
				"ASoC: Property '%s' index %d could not be read: %d\n",
				propname, 2 * i, ret);
4511 4512 4513 4514 4515 4516
			return -EINVAL;
		}
		ret = of_property_read_string_index(np, propname,
			(2 * i) + 1, &routes[i].source);
		if (ret) {
			dev_err(card->dev,
4517 4518
				"ASoC: Property '%s' index %d could not be read: %d\n",
				propname, (2 * i) + 1, ret);
4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529
			return -EINVAL;
		}
	}

	card->num_dapm_routes = num_routes;
	card->dapm_routes = routes;

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);

4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571
unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
				     const char *prefix)
{
	int ret, i;
	char prop[128];
	unsigned int format = 0;
	int bit, frame;
	const char *str;
	struct {
		char *name;
		unsigned int val;
	} of_fmt_table[] = {
		{ "i2s",	SND_SOC_DAIFMT_I2S },
		{ "right_j",	SND_SOC_DAIFMT_RIGHT_J },
		{ "left_j",	SND_SOC_DAIFMT_LEFT_J },
		{ "dsp_a",	SND_SOC_DAIFMT_DSP_A },
		{ "dsp_b",	SND_SOC_DAIFMT_DSP_B },
		{ "ac97",	SND_SOC_DAIFMT_AC97 },
		{ "pdm",	SND_SOC_DAIFMT_PDM},
		{ "msb",	SND_SOC_DAIFMT_MSB },
		{ "lsb",	SND_SOC_DAIFMT_LSB },
	};

	if (!prefix)
		prefix = "";

	/*
	 * check "[prefix]format = xxx"
	 * SND_SOC_DAIFMT_FORMAT_MASK area
	 */
	snprintf(prop, sizeof(prop), "%sformat", prefix);
	ret = of_property_read_string(np, prop, &str);
	if (ret == 0) {
		for (i = 0; i < ARRAY_SIZE(of_fmt_table); i++) {
			if (strcmp(str, of_fmt_table[i].name) == 0) {
				format |= of_fmt_table[i].val;
				break;
			}
		}
	}

	/*
4572
	 * check "[prefix]continuous-clock"
4573 4574
	 * SND_SOC_DAIFMT_CLOCK_MASK area
	 */
4575 4576 4577 4578 4579
	snprintf(prop, sizeof(prop), "%scontinuous-clock", prefix);
	if (of_get_property(np, prop, NULL))
		format |= SND_SOC_DAIFMT_CONT;
	else
		format |= SND_SOC_DAIFMT_GATED;
4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636

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

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

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

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

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

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

	return format;
}
EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);

4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655
int snd_soc_of_get_dai_name(struct device_node *of_node,
			    const char **dai_name)
{
	struct snd_soc_component *pos;
	struct of_phandle_args args;
	int ret;

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

	ret = -EPROBE_DEFER;

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

4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674
		if (pos->driver->of_xlate_dai_name) {
			ret = pos->driver->of_xlate_dai_name(pos, &args, dai_name);
		} else {
			int id = -1;

			switch (args.args_count) {
			case 0:
				id = 0; /* same as dai_drv[0] */
				break;
			case 1:
				id = args.args[0];
				break;
			default:
				/* not supported */
				break;
			}

			if (id < 0 || id >= pos->num_dai) {
				ret = -EINVAL;
X
Xiubo Li 已提交
4675
				break;
4676
			}
X
Xiubo Li 已提交
4677 4678 4679 4680 4681 4682

			ret = 0;

			*dai_name = pos->dai_drv[id].name;
			if (!*dai_name)
				*dai_name = pos->name;
4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694
		}

		break;
	}
	mutex_unlock(&client_mutex);

	of_node_put(args.np);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_of_get_dai_name);

4695
static int __init snd_soc_init(void)
F
Frank Mandarino 已提交
4696
{
4697
#ifdef CONFIG_DEBUG_FS
4698 4699
	snd_soc_debugfs_root = debugfs_create_dir("asoc", NULL);
	if (IS_ERR(snd_soc_debugfs_root) || !snd_soc_debugfs_root) {
4700
		pr_warn("ASoC: Failed to create debugfs directory\n");
4701
		snd_soc_debugfs_root = NULL;
4702
	}
4703

4704
	if (!debugfs_create_file("codecs", 0444, snd_soc_debugfs_root, NULL,
4705 4706 4707
				 &codec_list_fops))
		pr_warn("ASoC: Failed to create CODEC list debugfs file\n");

4708
	if (!debugfs_create_file("dais", 0444, snd_soc_debugfs_root, NULL,
M
Mark Brown 已提交
4709 4710
				 &dai_list_fops))
		pr_warn("ASoC: Failed to create DAI list debugfs file\n");
4711

4712
	if (!debugfs_create_file("platforms", 0444, snd_soc_debugfs_root, NULL,
4713 4714
				 &platform_list_fops))
		pr_warn("ASoC: Failed to create platform list debugfs file\n");
4715 4716
#endif

4717 4718
	snd_soc_util_init();

F
Frank Mandarino 已提交
4719 4720
	return platform_driver_register(&soc_driver);
}
4721
module_init(snd_soc_init);
F
Frank Mandarino 已提交
4722

M
Mark Brown 已提交
4723
static void __exit snd_soc_exit(void)
F
Frank Mandarino 已提交
4724
{
4725 4726
	snd_soc_util_exit();

4727
#ifdef CONFIG_DEBUG_FS
4728
	debugfs_remove_recursive(snd_soc_debugfs_root);
4729
#endif
4730
	platform_driver_unregister(&soc_driver);
F
Frank Mandarino 已提交
4731 4732 4733 4734
}
module_exit(snd_soc_exit);

/* Module information */
4735
MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
F
Frank Mandarino 已提交
4736 4737
MODULE_DESCRIPTION("ALSA SoC Core");
MODULE_LICENSE("GPL");
4738
MODULE_ALIAS("platform:soc-audio");