soc-core.c 88.5 KB
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/*
 * soc-core.c  --  ALSA SoC Audio Layer
 *
 * Copyright 2005 Wolfson Microelectronics PLC.
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 * Copyright 2005 Openedhand Ltd.
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 * Copyright (C) 2010 Slimlogic Ltd.
 * Copyright (C) 2010 Texas Instruments Inc.
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 *
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 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
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 *         with code, comments and ideas from :-
 *         Richard Purdie <richard@openedhand.com>
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 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  TODO:
 *   o Add hw rules to enforce rates, etc.
 *   o More testing with other codecs/machines.
 *   o Add more codecs and platforms to ensure good API coverage.
 *   o Support TDM on PCM and I2S
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/bitops.h>
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#include <linux/debugfs.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <sound/ac97_codec.h>
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#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>

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

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#define NAME_SIZE	32

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static DEFINE_MUTEX(pcm_mutex);
static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);

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#ifdef CONFIG_DEBUG_FS
static struct dentry *debugfs_root;
#endif

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static DEFINE_MUTEX(client_mutex);
static LIST_HEAD(card_list);
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static LIST_HEAD(dai_list);
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static LIST_HEAD(platform_list);
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static LIST_HEAD(codec_list);
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static int snd_soc_register_card(struct snd_soc_card *card);
static int snd_soc_unregister_card(struct snd_soc_card *card);
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static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
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/*
 * This is a timeout to do a DAPM powerdown after a stream is closed().
 * It can be used to eliminate pops between different playback streams, e.g.
 * between two audio tracks.
 */
static int pmdown_time = 5000;
module_param(pmdown_time, int, 0);
MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");

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/*
 * This function forces any delayed work to be queued and run.
 */
static int run_delayed_work(struct delayed_work *dwork)
{
	int ret;

	/* cancel any work waiting to be queued. */
	ret = cancel_delayed_work(dwork);

	/* if there was any work waiting then we run it now and
	 * wait for it's completion */
	if (ret) {
		schedule_delayed_work(dwork, 0);
		flush_scheduled_work();
	}
	return ret;
}

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/* codec register dump */
static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
{
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	int ret, i, step = 1, count = 0;
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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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	count += sprintf(buf, "%s registers\n", codec->name);
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	for (i = 0; i < codec->driver->reg_cache_size; i += step) {
		if (codec->driver->readable_register && !codec->driver->readable_register(i))
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			continue;

		count += sprintf(buf + count, "%2x: ", i);
		if (count >= PAGE_SIZE - 1)
			break;

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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 {
			/* If the read fails it's almost certainly due to
			 * the register being volatile and the device being
			 * powered off.
			 */
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			ret = codec->driver->read(codec, i);
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			if (ret >= 0)
				count += snprintf(buf + count,
						  PAGE_SIZE - count,
						  "%4x", ret);
			else
				count += snprintf(buf + count,
						  PAGE_SIZE - count,
						  "<no data: %d>", ret);
		}
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		if (count >= PAGE_SIZE - 1)
			break;

		count += snprintf(buf + count, PAGE_SIZE - count, "\n");
		if (count >= PAGE_SIZE - 1)
			break;
	}

	/* Truncate count; min() would cause a warning */
	if (count >= PAGE_SIZE)
		count = PAGE_SIZE - 1;

	return count;
}
static ssize_t codec_reg_show(struct device *dev,
	struct device_attribute *attr, char *buf)
{
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	struct snd_soc_pcm_runtime *rtd =
			container_of(dev, struct snd_soc_pcm_runtime, dev);

	return soc_codec_reg_show(rtd->codec, buf);
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}

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

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

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

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

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#ifdef CONFIG_DEBUG_FS
static int codec_reg_open_file(struct inode *inode, struct file *file)
{
	file->private_data = inode->i_private;
	return 0;
}

static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
			       size_t count, loff_t *ppos)
{
	ssize_t ret;
	struct snd_soc_codec *codec = file->private_data;
	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;
	ret = soc_codec_reg_show(codec, buf);
	if (ret >= 0)
		ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
	kfree(buf);
	return ret;
}

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

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

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	if (codec->driver->reg_cache_step)
		step = codec->driver->reg_cache_step;
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	while (*start == ' ')
		start++;
	reg = simple_strtoul(start, &start, 16);
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	if ((reg >= codec->driver->reg_cache_size) || (reg % step))
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		return -EINVAL;
	while (*start == ' ')
		start++;
	if (strict_strtoul(start, 16, &value))
		return -EINVAL;
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	codec->driver->write(codec, reg, value);
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	return buf_size;
}

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

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

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

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

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

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	snd_soc_dapm_debugfs_init(&codec->dapm);
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}

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

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

	if (!buf)
		return -ENOMEM;

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	list_for_each_entry(codec, &codec_list, list) {
		len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
			       codec->name);
		if (len >= 0)
			ret += len;
		if (ret > PAGE_SIZE) {
			ret = PAGE_SIZE;
			break;
		}
	}
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	if (ret >= 0)
		ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);

	kfree(buf);

	return ret;
}

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

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

	if (!buf)
		return -ENOMEM;

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	list_for_each_entry(dai, &dai_list, list) {
		len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", dai->name);
		if (len >= 0)
			ret += len;
		if (ret > PAGE_SIZE) {
			ret = PAGE_SIZE;
			break;
		}
	}
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	ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
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	kfree(buf);

	return ret;
}

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

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

	if (!buf)
		return -ENOMEM;

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	list_for_each_entry(platform, &platform_list, list) {
		len = snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",
			       platform->name);
		if (len >= 0)
			ret += len;
		if (ret > PAGE_SIZE) {
			ret = PAGE_SIZE;
			break;
		}
	}
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	ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
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	kfree(buf);

	return ret;
}

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

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static void soc_init_card_debugfs(struct snd_soc_card *card)
{
	card->debugfs_card_root = debugfs_create_dir(card->name,
						     debugfs_root);
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	if (!card->debugfs_card_root) {
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		dev_warn(card->dev,
			 "ASoC: Failed to create codec debugfs directory\n");
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		return;
	}

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

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

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#else

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

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

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

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

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

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

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

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

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

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

	return 0;
}

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

	mutex_lock(&pcm_mutex);

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

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

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

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

	/* Check that the codec and cpu DAI's are compatible */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		runtime->hw.rate_min =
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			max(codec_dai_drv->playback.rate_min,
			    cpu_dai_drv->playback.rate_min);
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		runtime->hw.rate_max =
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			min(codec_dai_drv->playback.rate_max,
			    cpu_dai_drv->playback.rate_max);
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		runtime->hw.channels_min =
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			max(codec_dai_drv->playback.channels_min,
				cpu_dai_drv->playback.channels_min);
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		runtime->hw.channels_max =
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			min(codec_dai_drv->playback.channels_max,
				cpu_dai_drv->playback.channels_max);
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		runtime->hw.formats =
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			codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
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		runtime->hw.rates =
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			codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
		if (codec_dai_drv->playback.rates
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			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
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			runtime->hw.rates |= cpu_dai_drv->playback.rates;
		if (cpu_dai_drv->playback.rates
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			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
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			runtime->hw.rates |= codec_dai_drv->playback.rates;
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	} else {
		runtime->hw.rate_min =
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			max(codec_dai_drv->capture.rate_min,
			    cpu_dai_drv->capture.rate_min);
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		runtime->hw.rate_max =
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			min(codec_dai_drv->capture.rate_max,
			    cpu_dai_drv->capture.rate_max);
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		runtime->hw.channels_min =
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			max(codec_dai_drv->capture.channels_min,
				cpu_dai_drv->capture.channels_min);
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		runtime->hw.channels_max =
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			min(codec_dai_drv->capture.channels_max,
				cpu_dai_drv->capture.channels_max);
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		runtime->hw.formats =
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			codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
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		runtime->hw.rates =
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			codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
		if (codec_dai_drv->capture.rates
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			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
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			runtime->hw.rates |= cpu_dai_drv->capture.rates;
		if (cpu_dai_drv->capture.rates
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			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
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			runtime->hw.rates |= codec_dai_drv->capture.rates;
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	}

	snd_pcm_limit_hw_rates(runtime);
	if (!runtime->hw.rates) {
		printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
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			codec_dai->name, cpu_dai->name);
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		goto config_err;
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	}
	if (!runtime->hw.formats) {
		printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
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			codec_dai->name, cpu_dai->name);
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		goto config_err;
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	}
	if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
		printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
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				codec_dai->name, cpu_dai->name);
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		goto config_err;
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	}

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	/* Symmetry only applies if we've already got an active stream. */
	if (cpu_dai->active || codec_dai->active) {
		ret = soc_pcm_apply_symmetry(substream);
		if (ret != 0)
599
			goto config_err;
600 601
	}

602 603
	pr_debug("asoc: %s <-> %s info:\n",
			codec_dai->name, cpu_dai->name);
604 605 606 607 608
	pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
	pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
		 runtime->hw.channels_max);
	pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
		 runtime->hw.rate_max);
F
Frank Mandarino 已提交
609

610
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
611 612
		cpu_dai->playback_active++;
		codec_dai->playback_active++;
613
	} else {
614 615
		cpu_dai->capture_active++;
		codec_dai->capture_active++;
616 617 618
	}
	cpu_dai->active++;
	codec_dai->active++;
619
	rtd->codec->active++;
F
Frank Mandarino 已提交
620 621 622
	mutex_unlock(&pcm_mutex);
	return 0;

623
config_err:
624 625
	if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
		rtd->dai_link->ops->shutdown(substream);
F
Frank Mandarino 已提交
626

627
machine_err:
628 629
	if (codec_dai->driver->ops->shutdown)
		codec_dai->driver->ops->shutdown(substream, codec_dai);
630

631
codec_dai_err:
632 633
	if (platform->driver->ops->close)
		platform->driver->ops->close(substream);
F
Frank Mandarino 已提交
634 635

platform_err:
636 637
	if (cpu_dai->driver->ops->shutdown)
		cpu_dai->driver->ops->shutdown(substream, cpu_dai);
F
Frank Mandarino 已提交
638 639 640 641 642 643
out:
	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
644
 * Power down the audio subsystem pmdown_time msecs after close is called.
F
Frank Mandarino 已提交
645 646 647
 * This is to ensure there are no pops or clicks in between any music tracks
 * due to DAPM power cycling.
 */
648
static void close_delayed_work(struct work_struct *work)
F
Frank Mandarino 已提交
649
{
650 651 652
	struct snd_soc_pcm_runtime *rtd =
			container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
F
Frank Mandarino 已提交
653 654

	mutex_lock(&pcm_mutex);
655 656 657 658 659 660 661 662 663 664 665 666

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

	/* are we waiting on this codec DAI stream */
	if (codec_dai->pop_wait == 1) {
		codec_dai->pop_wait = 0;
		snd_soc_dapm_stream_event(rtd,
			codec_dai->driver->playback.stream_name,
			SND_SOC_DAPM_STREAM_STOP);
F
Frank Mandarino 已提交
667
	}
668

F
Frank Mandarino 已提交
669 670 671 672 673 674 675 676 677 678 679
	mutex_unlock(&pcm_mutex);
}

/*
 * Called by ALSA when a PCM substream is closed. Private data can be
 * freed here. The cpu DAI, codec DAI, machine and platform are also
 * shutdown.
 */
static int soc_codec_close(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
680 681 682 683
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_codec *codec = rtd->codec;
F
Frank Mandarino 已提交
684 685 686

	mutex_lock(&pcm_mutex);

687
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
688 689
		cpu_dai->playback_active--;
		codec_dai->playback_active--;
690
	} else {
691 692
		cpu_dai->capture_active--;
		codec_dai->capture_active--;
F
Frank Mandarino 已提交
693
	}
694 695 696

	cpu_dai->active--;
	codec_dai->active--;
F
Frank Mandarino 已提交
697 698
	codec->active--;

699 700 701 702 703 704
	/* Muting the DAC suppresses artifacts caused during digital
	 * shutdown, for example from stopping clocks.
	 */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		snd_soc_dai_digital_mute(codec_dai, 1);

705 706
	if (cpu_dai->driver->ops->shutdown)
		cpu_dai->driver->ops->shutdown(substream, cpu_dai);
F
Frank Mandarino 已提交
707

708 709
	if (codec_dai->driver->ops->shutdown)
		codec_dai->driver->ops->shutdown(substream, codec_dai);
F
Frank Mandarino 已提交
710

711 712
	if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
		rtd->dai_link->ops->shutdown(substream);
F
Frank Mandarino 已提交
713

714 715 716
	if (platform->driver->ops->close)
		platform->driver->ops->close(substream);
	cpu_dai->runtime = NULL;
F
Frank Mandarino 已提交
717 718 719

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		/* start delayed pop wq here for playback streams */
720
		codec_dai->pop_wait = 1;
721 722
		schedule_delayed_work(&rtd->delayed_work,
			msecs_to_jiffies(rtd->pmdown_time));
F
Frank Mandarino 已提交
723 724
	} else {
		/* capture streams can be powered down now */
725 726
		snd_soc_dapm_stream_event(rtd,
			codec_dai->driver->capture.stream_name,
727
			SND_SOC_DAPM_STREAM_STOP);
F
Frank Mandarino 已提交
728 729 730 731 732 733 734 735 736 737 738 739 740 741
	}

	mutex_unlock(&pcm_mutex);
	return 0;
}

/*
 * Called by ALSA when the PCM substream is prepared, can set format, sample
 * rate, etc.  This function is non atomic and can be called multiple times,
 * it can refer to the runtime info.
 */
static int soc_pcm_prepare(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
742 743 744
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
F
Frank Mandarino 已提交
745 746 747
	int ret = 0;

	mutex_lock(&pcm_mutex);
748

749 750
	if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
		ret = rtd->dai_link->ops->prepare(substream);
751 752 753 754 755 756
		if (ret < 0) {
			printk(KERN_ERR "asoc: machine prepare error\n");
			goto out;
		}
	}

757 758
	if (platform->driver->ops->prepare) {
		ret = platform->driver->ops->prepare(substream);
759 760
		if (ret < 0) {
			printk(KERN_ERR "asoc: platform prepare error\n");
F
Frank Mandarino 已提交
761
			goto out;
762
		}
F
Frank Mandarino 已提交
763 764
	}

765 766
	if (codec_dai->driver->ops->prepare) {
		ret = codec_dai->driver->ops->prepare(substream, codec_dai);
767 768
		if (ret < 0) {
			printk(KERN_ERR "asoc: codec DAI prepare error\n");
F
Frank Mandarino 已提交
769
			goto out;
770
		}
F
Frank Mandarino 已提交
771 772
	}

773 774
	if (cpu_dai->driver->ops->prepare) {
		ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
775 776 777 778 779
		if (ret < 0) {
			printk(KERN_ERR "asoc: cpu DAI prepare error\n");
			goto out;
		}
	}
F
Frank Mandarino 已提交
780

781 782 783 784
	/* cancel any delayed stream shutdown that is pending */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
	    codec_dai->pop_wait) {
		codec_dai->pop_wait = 0;
785
		cancel_delayed_work(&rtd->delayed_work);
786
	}
F
Frank Mandarino 已提交
787

788
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
789 790
		snd_soc_dapm_stream_event(rtd,
					  codec_dai->driver->playback.stream_name,
791 792
					  SND_SOC_DAPM_STREAM_START);
	else
793 794
		snd_soc_dapm_stream_event(rtd,
					  codec_dai->driver->capture.stream_name,
795
					  SND_SOC_DAPM_STREAM_START);
796

797
	snd_soc_dai_digital_mute(codec_dai, 0);
F
Frank Mandarino 已提交
798 799 800 801 802 803 804 805 806 807 808 809 810 811 812

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

/*
 * Called by ALSA when the hardware params are set by application. This
 * function can also be called multiple times and can allocate buffers
 * (using snd_pcm_lib_* ). It's non-atomic.
 */
static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
813 814 815
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
F
Frank Mandarino 已提交
816 817 818 819
	int ret = 0;

	mutex_lock(&pcm_mutex);

820 821
	if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
		ret = rtd->dai_link->ops->hw_params(substream, params);
822 823
		if (ret < 0) {
			printk(KERN_ERR "asoc: machine hw_params failed\n");
F
Frank Mandarino 已提交
824
			goto out;
825
		}
F
Frank Mandarino 已提交
826 827
	}

828 829
	if (codec_dai->driver->ops->hw_params) {
		ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
F
Frank Mandarino 已提交
830 831
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't set codec %s hw params\n",
832 833
				codec_dai->name);
			goto codec_err;
F
Frank Mandarino 已提交
834 835 836
		}
	}

837 838
	if (cpu_dai->driver->ops->hw_params) {
		ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
F
Frank Mandarino 已提交
839
		if (ret < 0) {
840
			printk(KERN_ERR "asoc: interface %s hw params failed\n",
841
				cpu_dai->name);
F
Frank Mandarino 已提交
842 843 844 845
			goto interface_err;
		}
	}

846 847
	if (platform->driver->ops->hw_params) {
		ret = platform->driver->ops->hw_params(substream, params);
F
Frank Mandarino 已提交
848
		if (ret < 0) {
849
			printk(KERN_ERR "asoc: platform %s hw params failed\n",
F
Frank Mandarino 已提交
850 851 852 853 854
				platform->name);
			goto platform_err;
		}
	}

855
	rtd->rate = params_rate(params);
856

F
Frank Mandarino 已提交
857 858 859 860 861
out:
	mutex_unlock(&pcm_mutex);
	return ret;

platform_err:
862 863
	if (cpu_dai->driver->ops->hw_free)
		cpu_dai->driver->ops->hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
864 865

interface_err:
866 867
	if (codec_dai->driver->ops->hw_free)
		codec_dai->driver->ops->hw_free(substream, codec_dai);
868 869

codec_err:
870 871
	if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
		rtd->dai_link->ops->hw_free(substream);
F
Frank Mandarino 已提交
872 873 874 875 876 877 878 879 880 881 882

	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
 * Free's resources allocated by hw_params, can be called multiple times
 */
static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
883 884 885 886
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_codec *codec = rtd->codec;
F
Frank Mandarino 已提交
887 888 889 890

	mutex_lock(&pcm_mutex);

	/* apply codec digital mute */
891 892
	if (!codec->active)
		snd_soc_dai_digital_mute(codec_dai, 1);
F
Frank Mandarino 已提交
893 894

	/* free any machine hw params */
895 896
	if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
		rtd->dai_link->ops->hw_free(substream);
F
Frank Mandarino 已提交
897 898

	/* free any DMA resources */
899 900
	if (platform->driver->ops->hw_free)
		platform->driver->ops->hw_free(substream);
F
Frank Mandarino 已提交
901 902

	/* now free hw params for the DAI's  */
903 904
	if (codec_dai->driver->ops->hw_free)
		codec_dai->driver->ops->hw_free(substream, codec_dai);
F
Frank Mandarino 已提交
905

906 907
	if (cpu_dai->driver->ops->hw_free)
		cpu_dai->driver->ops->hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
908 909 910 911 912 913 914 915

	mutex_unlock(&pcm_mutex);
	return 0;
}

static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
916 917 918
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
F
Frank Mandarino 已提交
919 920
	int ret;

921 922
	if (codec_dai->driver->ops->trigger) {
		ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
F
Frank Mandarino 已提交
923 924 925 926
		if (ret < 0)
			return ret;
	}

927 928
	if (platform->driver->ops->trigger) {
		ret = platform->driver->ops->trigger(substream, cmd);
F
Frank Mandarino 已提交
929 930 931 932
		if (ret < 0)
			return ret;
	}

933 934
	if (cpu_dai->driver->ops->trigger) {
		ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
F
Frank Mandarino 已提交
935 936 937 938 939 940
		if (ret < 0)
			return ret;
	}
	return 0;
}

941 942
/*
 * soc level wrapper for pointer callback
943 944
 * If cpu_dai, codec_dai, platform driver has the delay callback, than
 * the runtime->delay will be updated accordingly.
945 946 947 948
 */
static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
949 950 951
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
952
	struct snd_pcm_runtime *runtime = substream->runtime;
953
	snd_pcm_uframes_t offset = 0;
954
	snd_pcm_sframes_t delay = 0;
955

956 957
	if (platform->driver->ops->pointer)
		offset = platform->driver->ops->pointer(substream);
958

959 960
	if (cpu_dai->driver->ops->delay)
		delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
961

962 963
	if (codec_dai->driver->ops->delay)
		delay += codec_dai->driver->ops->delay(substream, codec_dai);
964

965 966
	if (platform->driver->delay)
		delay += platform->driver->delay(substream, codec_dai);
967 968 969

	runtime->delay = delay;

970 971 972
	return offset;
}

F
Frank Mandarino 已提交
973 974 975 976 977 978 979 980
/* ASoC PCM operations */
static struct snd_pcm_ops soc_pcm_ops = {
	.open		= soc_pcm_open,
	.close		= soc_codec_close,
	.hw_params	= soc_pcm_hw_params,
	.hw_free	= soc_pcm_hw_free,
	.prepare	= soc_pcm_prepare,
	.trigger	= soc_pcm_trigger,
981
	.pointer	= soc_pcm_pointer,
F
Frank Mandarino 已提交
982 983 984 985
};

#ifdef CONFIG_PM
/* powers down audio subsystem for suspend */
M
Mark Brown 已提交
986
static int soc_suspend(struct device *dev)
F
Frank Mandarino 已提交
987
{
M
Mark Brown 已提交
988
	struct platform_device *pdev = to_platform_device(dev);
989
	struct snd_soc_card *card = platform_get_drvdata(pdev);
F
Frank Mandarino 已提交
990 991
	int i;

992 993 994
	/* If the initialization of this soc device failed, there is no codec
	 * associated with it. Just bail out in this case.
	 */
995
	if (list_empty(&card->codec_dev_list))
996 997
		return 0;

998 999 1000
	/* Due to the resume being scheduled into a workqueue we could
	* suspend before that's finished - wait for it to complete.
	 */
1001 1002 1003
	snd_power_lock(card->snd_card);
	snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
	snd_power_unlock(card->snd_card);
1004 1005

	/* we're going to block userspace touching us until resume completes */
1006
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
1007

F
Frank Mandarino 已提交
1008
	/* mute any active DAC's */
1009 1010 1011
	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;
1012

1013
		if (card->rtd[i].dai_link->ignore_suspend)
1014 1015
			continue;

1016 1017
		if (drv->ops->digital_mute && dai->playback_active)
			drv->ops->digital_mute(dai, 1);
F
Frank Mandarino 已提交
1018 1019
	}

1020
	/* suspend all pcms */
1021 1022
	for (i = 0; i < card->num_rtd; i++) {
		if (card->rtd[i].dai_link->ignore_suspend)
1023 1024
			continue;

1025
		snd_pcm_suspend_all(card->rtd[i].pcm);
1026
	}
1027

1028
	if (card->suspend_pre)
M
Mark Brown 已提交
1029
		card->suspend_pre(pdev, PMSG_SUSPEND);
F
Frank Mandarino 已提交
1030

1031 1032 1033
	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;
1034

1035
		if (card->rtd[i].dai_link->ignore_suspend)
1036 1037
			continue;

1038 1039 1040 1041 1042 1043
		if (cpu_dai->driver->suspend && !cpu_dai->driver->ac97_control)
			cpu_dai->driver->suspend(cpu_dai);
		if (platform->driver->suspend && !platform->suspended) {
			platform->driver->suspend(cpu_dai);
			platform->suspended = 1;
		}
F
Frank Mandarino 已提交
1044 1045 1046
	}

	/* close any waiting streams and save state */
1047 1048
	for (i = 0; i < card->num_rtd; i++) {
		run_delayed_work(&card->rtd[i].delayed_work);
L
Liam Girdwood 已提交
1049
		card->rtd[i].codec->dapm.suspend_bias_level = card->rtd[i].codec->dapm.bias_level;
1050
	}
F
Frank Mandarino 已提交
1051

1052 1053
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1054

1055
		if (card->rtd[i].dai_link->ignore_suspend)
1056 1057
			continue;

1058 1059
		if (driver->playback.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
F
Frank Mandarino 已提交
1060
				SND_SOC_DAPM_STREAM_SUSPEND);
1061 1062 1063

		if (driver->capture.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
F
Frank Mandarino 已提交
1064 1065 1066
				SND_SOC_DAPM_STREAM_SUSPEND);
	}

1067 1068 1069 1070 1071 1072
	/* suspend all CODECs */
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_codec *codec = card->rtd[i].codec;
		/* 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
1073
			switch (codec->dapm.bias_level) {
1074 1075 1076 1077 1078 1079 1080 1081 1082
			case SND_SOC_BIAS_STANDBY:
			case SND_SOC_BIAS_OFF:
				codec->driver->suspend(codec, PMSG_SUSPEND);
				codec->suspended = 1;
				break;
			default:
				dev_dbg(codec->dev, "CODEC is on over suspend\n");
				break;
			}
1083 1084
		}
	}
F
Frank Mandarino 已提交
1085

1086 1087
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1088

1089
		if (card->rtd[i].dai_link->ignore_suspend)
1090 1091
			continue;

1092 1093
		if (cpu_dai->driver->suspend && cpu_dai->driver->ac97_control)
			cpu_dai->driver->suspend(cpu_dai);
F
Frank Mandarino 已提交
1094 1095
	}

1096
	if (card->suspend_post)
M
Mark Brown 已提交
1097
		card->suspend_post(pdev, PMSG_SUSPEND);
F
Frank Mandarino 已提交
1098 1099 1100 1101

	return 0;
}

1102 1103 1104 1105
/* 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
1106
{
1107 1108 1109
	struct snd_soc_card *card =
			container_of(work, struct snd_soc_card, deferred_resume_work);
	struct platform_device *pdev = to_platform_device(card->dev);
F
Frank Mandarino 已提交
1110 1111
	int i;

1112 1113 1114 1115
	/* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
	 * so userspace apps are blocked from touching us
	 */

1116
	dev_dbg(card->dev, "starting resume work\n");
1117

1118
	/* Bring us up into D2 so that DAPM starts enabling things */
1119
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D2);
1120

1121 1122
	if (card->resume_pre)
		card->resume_pre(pdev);
F
Frank Mandarino 已提交
1123

1124 1125 1126
	/* resume AC97 DAIs */
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
1127

1128
		if (card->rtd[i].dai_link->ignore_suspend)
1129 1130
			continue;

1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141
		if (cpu_dai->driver->resume && cpu_dai->driver->ac97_control)
			cpu_dai->driver->resume(cpu_dai);
	}

	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_codec *codec = card->rtd[i].codec;
		/* 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
1142
			switch (codec->dapm.bias_level) {
1143 1144 1145 1146 1147 1148 1149 1150 1151
			case SND_SOC_BIAS_STANDBY:
			case SND_SOC_BIAS_OFF:
				codec->driver->resume(codec);
				codec->suspended = 0;
				break;
			default:
				dev_dbg(codec->dev, "CODEC was on over suspend\n");
				break;
			}
1152 1153
		}
	}
F
Frank Mandarino 已提交
1154

1155 1156
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai_driver *driver = card->rtd[i].codec_dai->driver;
1157

1158
		if (card->rtd[i].dai_link->ignore_suspend)
1159 1160
			continue;

1161 1162
		if (driver->playback.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->playback.stream_name,
F
Frank Mandarino 已提交
1163
				SND_SOC_DAPM_STREAM_RESUME);
1164 1165 1166

		if (driver->capture.stream_name != NULL)
			snd_soc_dapm_stream_event(&card->rtd[i], driver->capture.stream_name,
F
Frank Mandarino 已提交
1167 1168 1169
				SND_SOC_DAPM_STREAM_RESUME);
	}

1170
	/* unmute any active DACs */
1171 1172 1173
	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;
1174

1175
		if (card->rtd[i].dai_link->ignore_suspend)
1176 1177
			continue;

1178 1179
		if (drv->ops->digital_mute && dai->playback_active)
			drv->ops->digital_mute(dai, 0);
F
Frank Mandarino 已提交
1180 1181
	}

1182 1183 1184
	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;
1185

1186
		if (card->rtd[i].dai_link->ignore_suspend)
1187 1188
			continue;

1189 1190 1191 1192 1193 1194
		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
1195 1196
	}

1197 1198
	if (card->resume_post)
		card->resume_post(pdev);
F
Frank Mandarino 已提交
1199

1200
	dev_dbg(card->dev, "resume work completed\n");
1201 1202

	/* userspace can access us now we are back as we were before */
1203
	snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D0);
1204 1205 1206
}

/* powers up audio subsystem after a suspend */
M
Mark Brown 已提交
1207
static int soc_resume(struct device *dev)
1208
{
M
Mark Brown 已提交
1209
	struct platform_device *pdev = to_platform_device(dev);
1210 1211
	struct snd_soc_card *card = platform_get_drvdata(pdev);
	int i;
1212

1213 1214 1215 1216 1217
	/* 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.
	 */
1218 1219 1220 1221 1222 1223 1224 1225 1226 1227
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_dai *cpu_dai = card->rtd[i].cpu_dai;
		if (cpu_dai->driver->ac97_control) {
			dev_dbg(dev, "Resuming AC97 immediately\n");
			soc_resume_deferred(&card->deferred_resume_work);
		} else {
			dev_dbg(dev, "Scheduling resume work\n");
			if (!schedule_work(&card->deferred_resume_work))
				dev_err(dev, "resume work item may be lost\n");
		}
1228
	}
1229

F
Frank Mandarino 已提交
1230 1231 1232 1233 1234 1235 1236
	return 0;
}
#else
#define soc_suspend	NULL
#define soc_resume	NULL
#endif

1237 1238 1239
static struct snd_soc_dai_ops null_dai_ops = {
};

1240
static int soc_bind_dai_link(struct snd_soc_card *card, int num)
F
Frank Mandarino 已提交
1241
{
1242 1243
	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
1244
	struct snd_soc_codec *codec;
1245
	struct snd_soc_platform *platform;
1246
	struct snd_soc_dai *codec_dai, *cpu_dai;
1247

1248 1249 1250
	if (rtd->complete)
		return 1;
	dev_dbg(card->dev, "binding %s at idx %d\n", dai_link->name, num);
1251

1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264
	/* do we already have the CPU DAI for this link ? */
	if (rtd->cpu_dai) {
		goto find_codec;
	}
	/* no, then find CPU DAI from registered DAIs*/
	list_for_each_entry(cpu_dai, &dai_list, list) {
		if (!strcmp(cpu_dai->name, dai_link->cpu_dai_name)) {

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

			rtd->cpu_dai = cpu_dai;
			goto find_codec;
1265 1266
		}
	}
1267 1268
	dev_dbg(card->dev, "CPU DAI %s not registered\n",
			dai_link->cpu_dai_name);
1269

1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290
find_codec:
	/* do we already have the CODEC for this link ? */
	if (rtd->codec) {
		goto find_platform;
	}

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

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

			/* CODEC found, so find CODEC DAI from registered DAIs from this CODEC*/
			list_for_each_entry(codec_dai, &dai_list, list) {
				if (codec->dev == codec_dai->dev &&
						!strcmp(codec_dai->name, dai_link->codec_dai_name)) {
					rtd->codec_dai = codec_dai;
					goto find_platform;
				}
1291
			}
1292 1293 1294 1295
			dev_dbg(card->dev, "CODEC DAI %s not registered\n",
					dai_link->codec_dai_name);

			goto find_platform;
1296
		}
1297 1298 1299
	}
	dev_dbg(card->dev, "CODEC %s not registered\n",
			dai_link->codec_name);
1300

1301 1302 1303 1304
find_platform:
	/* do we already have the CODEC DAI for this link ? */
	if (rtd->platform) {
		goto out;
M
Mark Brown 已提交
1305
	}
1306 1307 1308
	/* no, then find CPU DAI from registered DAIs*/
	list_for_each_entry(platform, &platform_list, list) {
		if (!strcmp(platform->name, dai_link->platform_name)) {
M
Mark Brown 已提交
1309

1310 1311 1312 1313 1314 1315
			if (!try_module_get(platform->dev->driver->owner))
				return -ENODEV;

			rtd->platform = platform;
			goto out;
		}
1316 1317
	}

1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351
	dev_dbg(card->dev, "platform %s not registered\n",
			dai_link->platform_name);
	return 0;

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

static void soc_remove_dai_link(struct snd_soc_card *card, int num)
{
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
	int err;

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

	/* remove the CODEC DAI */
	if (codec_dai && codec_dai->probed) {
		if (codec_dai->driver->remove) {
			err = codec_dai->driver->remove(codec_dai);
			if (err < 0)
				printk(KERN_ERR "asoc: failed to remove %s\n", codec_dai->name);
1352
		}
1353 1354 1355
		codec_dai->probed = 0;
		list_del(&codec_dai->card_list);
	}
1356

1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367
	/* remove the platform */
	if (platform && platform->probed) {
		if (platform->driver->remove) {
			err = platform->driver->remove(platform);
			if (err < 0)
				printk(KERN_ERR "asoc: failed to remove %s\n", platform->name);
		}
		platform->probed = 0;
		list_del(&platform->card_list);
		module_put(platform->dev->driver->owner);
	}
1368

1369 1370 1371 1372 1373 1374 1375
	/* remove the CODEC */
	if (codec && codec->probed) {
		if (codec->driver->remove) {
			err = codec->driver->remove(codec);
			if (err < 0)
				printk(KERN_ERR "asoc: failed to remove %s\n", codec->name);
		}
1376

1377
		/* Make sure all DAPM widgets are freed */
L
Liam Girdwood 已提交
1378
		snd_soc_dapm_free(&codec->dapm);
1379

1380 1381 1382 1383 1384
		soc_cleanup_codec_debugfs(codec);
		device_remove_file(&rtd->dev, &dev_attr_codec_reg);
		codec->probed = 0;
		list_del(&codec->card_list);
		module_put(codec->dev->driver->owner);
F
Frank Mandarino 已提交
1385 1386
	}

1387 1388 1389 1390 1391 1392
	/* remove the cpu_dai */
	if (cpu_dai && cpu_dai->probed) {
		if (cpu_dai->driver->remove) {
			err = cpu_dai->driver->remove(cpu_dai);
			if (err < 0)
				printk(KERN_ERR "asoc: failed to remove %s\n", cpu_dai->name);
F
Frank Mandarino 已提交
1393
		}
1394 1395 1396
		cpu_dai->probed = 0;
		list_del(&cpu_dai->card_list);
		module_put(cpu_dai->dev->driver->owner);
F
Frank Mandarino 已提交
1397
	}
1398
}
F
Frank Mandarino 已提交
1399

1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437
static void rtd_release(struct device *dev) {}

static int soc_probe_dai_link(struct snd_soc_card *card, int num)
{
	struct snd_soc_dai_link *dai_link = &card->dai_link[num];
	struct snd_soc_pcm_runtime *rtd = &card->rtd[num];
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *codec_dai = rtd->codec_dai, *cpu_dai = rtd->cpu_dai;
	int ret;

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

	/* config components */
	codec_dai->codec = codec;
	codec->card = card;
	cpu_dai->platform = platform;
	rtd->card = card;
	rtd->dev.parent = card->dev;
	codec_dai->card = card;
	cpu_dai->card = card;

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

	/* probe the cpu_dai */
	if (!cpu_dai->probed) {
		if (cpu_dai->driver->probe) {
			ret = cpu_dai->driver->probe(cpu_dai);
			if (ret < 0) {
				printk(KERN_ERR "asoc: failed to probe CPU DAI %s\n",
						cpu_dai->name);
				return ret;
			}
		}
		cpu_dai->probed = 1;
		/* mark cpu_dai as probed and add to card cpu_dai list */
		list_add(&cpu_dai->card_list, &card->dai_dev_list);
F
Frank Mandarino 已提交
1438 1439
	}

1440 1441
	/* probe the CODEC */
	if (!codec->probed) {
1442
		codec->dapm.card = card;
1443 1444 1445 1446 1447 1448 1449 1450
		if (codec->driver->probe) {
			ret = codec->driver->probe(codec);
			if (ret < 0) {
				printk(KERN_ERR "asoc: failed to probe CODEC %s\n",
						codec->name);
				return ret;
			}
		}
1451 1452 1453

		soc_init_codec_debugfs(codec);

1454 1455 1456
		/* mark codec as probed and add to card codec list */
		codec->probed = 1;
		list_add(&codec->card_list, &card->codec_dev_list);
F
Frank Mandarino 已提交
1457 1458
	}

1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472
	/* probe the platform */
	if (!platform->probed) {
		if (platform->driver->probe) {
			ret = platform->driver->probe(platform);
			if (ret < 0) {
				printk(KERN_ERR "asoc: failed to probe platform %s\n",
						platform->name);
				return ret;
			}
		}
		/* mark platform as probed and add to card platform list */
		platform->probed = 1;
		list_add(&platform->card_list, &card->platform_dev_list);
	}
1473

1474 1475 1476 1477
	/* probe the CODEC DAI */
	if (!codec_dai->probed) {
		if (codec_dai->driver->probe) {
			ret = codec_dai->driver->probe(codec_dai);
M
Mark Brown 已提交
1478
			if (ret < 0) {
1479 1480 1481
				printk(KERN_ERR "asoc: failed to probe CODEC DAI %s\n",
						codec_dai->name);
				return ret;
M
Mark Brown 已提交
1482 1483
			}
		}
1484 1485 1486 1487

		/* mark cpu_dai as probed and add to card cpu_dai list */
		codec_dai->probed = 1;
		list_add(&codec_dai->card_list, &card->dai_dev_list);
M
Mark Brown 已提交
1488 1489
	}

1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500
	/* DAPM dai link stream work */
	INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);

	/* now that all clients have probed, initialise the DAI link */
	if (dai_link->init) {
		ret = dai_link->init(rtd);
		if (ret < 0) {
			printk(KERN_ERR "asoc: failed to init %s\n", dai_link->stream_name);
			return ret;
		}
	}
M
Mark Brown 已提交
1501 1502

	/* Make sure all DAPM widgets are instantiated */
L
Liam Girdwood 已提交
1503 1504
	snd_soc_dapm_new_widgets(&codec->dapm);
	snd_soc_dapm_sync(&codec->dapm);
M
Mark Brown 已提交
1505

1506 1507 1508 1509
	/* register the rtd device */
	rtd->dev.release = rtd_release;
	rtd->dev.init_name = dai_link->name;
	ret = device_register(&rtd->dev);
M
Mark Brown 已提交
1510
	if (ret < 0) {
1511 1512
		printk(KERN_ERR "asoc: failed to register DAI runtime device %d\n", ret);
		return ret;
M
Mark Brown 已提交
1513 1514
	}

1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543
	rtd->dev_registered = 1;
	ret = device_create_file(&rtd->dev, &dev_attr_pmdown_time);
	if (ret < 0)
		printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");

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

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

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

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

	return 0;
}

M
Mark Brown 已提交
1544
#ifdef CONFIG_SND_SOC_AC97_BUS
1545 1546 1547 1548
static int soc_register_ac97_dai_link(struct snd_soc_pcm_runtime *rtd)
{
	int ret;

M
Mark Brown 已提交
1549 1550 1551
	/* Only instantiate AC97 if not already done by the adaptor
	 * for the generic AC97 subsystem.
	 */
1552
	if (rtd->codec_dai->driver->ac97_control && !rtd->codec->ac97_registered) {
1553 1554 1555 1556 1557 1558 1559 1560 1561 1562
		/*
		 * 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;
1563 1564

		ret = soc_ac97_dev_register(rtd->codec);
M
Mark Brown 已提交
1565 1566
		if (ret < 0) {
			printk(KERN_ERR "asoc: AC97 device register failed\n");
1567
			return ret;
M
Mark Brown 已提交
1568
		}
1569 1570

		rtd->codec->ac97_registered = 1;
M
Mark Brown 已提交
1571
	}
1572 1573 1574 1575 1576 1577 1578 1579 1580 1581
	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
1582 1583
#endif

1584 1585 1586 1587
static void snd_soc_instantiate_card(struct snd_soc_card *card)
{
	struct platform_device *pdev = to_platform_device(card->dev);
	int ret, i;
M
Mark Brown 已提交
1588

1589
	mutex_lock(&card->mutex);
1590

1591 1592 1593 1594
	if (card->instantiated) {
		mutex_unlock(&card->mutex);
		return;
	}
M
Mark Brown 已提交
1595

1596 1597 1598
	/* bind DAIs */
	for (i = 0; i < card->num_links; i++)
		soc_bind_dai_link(card, i);
M
Mark Brown 已提交
1599

1600 1601 1602 1603 1604
	/* bind completed ? */
	if (card->num_rtd != card->num_links) {
		mutex_unlock(&card->mutex);
		return;
	}
1605

1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620
	/* card bind complete so register a sound card */
	ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
			card->owner, 0, &card->snd_card);
	if (ret < 0) {
		printk(KERN_ERR "asoc: can't create sound card for card %s\n",
			card->name);
		mutex_unlock(&card->mutex);
		return;
	}
	card->snd_card->dev = card->dev;

#ifdef CONFIG_PM
	/* deferred resume work */
	INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
#endif
F
Frank Mandarino 已提交
1621

1622 1623 1624 1625 1626 1627
	/* initialise the sound card only once */
	if (card->probe) {
		ret = card->probe(pdev);
		if (ret < 0)
			goto card_probe_error;
	}
M
Mark Brown 已提交
1628

1629 1630 1631
	for (i = 0; i < card->num_links; i++) {
		ret = soc_probe_dai_link(card, i);
		if (ret < 0) {
1632 1633
			pr_err("asoc: failed to instantiate card %s: %d\n",
			       card->name, ret);
1634 1635 1636
			goto probe_dai_err;
		}
	}
F
Frank Mandarino 已提交
1637

1638 1639 1640 1641 1642 1643 1644 1645 1646
	snprintf(card->snd_card->shortname, sizeof(card->snd_card->shortname),
		 "%s",  card->name);
	snprintf(card->snd_card->longname, sizeof(card->snd_card->longname),
		 "%s", card->name);

	ret = snd_card_register(card->snd_card);
	if (ret < 0) {
		printk(KERN_ERR "asoc: failed to register soundcard for %s\n", card->name);
		goto probe_dai_err;
F
Frank Mandarino 已提交
1647 1648
	}

1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668
#ifdef CONFIG_SND_SOC_AC97_BUS
	/* register any AC97 codecs */
	for (i = 0; i < card->num_rtd; i++) {
			ret = soc_register_ac97_dai_link(&card->rtd[i]);
			if (ret < 0) {
				printk(KERN_ERR "asoc: failed to register AC97 %s\n", card->name);
				goto probe_dai_err;
			}
		}
#endif

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

probe_dai_err:
	for (i = 0; i < card->num_links; i++)
		soc_remove_dai_link(card, i);

card_probe_error:
1669 1670
	if (card->remove)
		card->remove(pdev);
1671 1672 1673 1674

	snd_card_free(card->snd_card);

	mutex_unlock(&card->mutex);
1675
}
F
Frank Mandarino 已提交
1676

1677
/*
1678
 * Attempt to initialise any uninitialised cards.  Must be called with
1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690
 * client_mutex.
 */
static void snd_soc_instantiate_cards(void)
{
	struct snd_soc_card *card;
	list_for_each_entry(card, &card_list, list)
		snd_soc_instantiate_card(card);
}

/* probes a new socdev */
static int soc_probe(struct platform_device *pdev)
{
1691
	struct snd_soc_card *card = platform_get_drvdata(pdev);
1692 1693 1694 1695
	int ret = 0;

	/* Bodge while we unpick instantiation */
	card->dev = &pdev->dev;
1696 1697 1698 1699
	INIT_LIST_HEAD(&card->dai_dev_list);
	INIT_LIST_HEAD(&card->codec_dev_list);
	INIT_LIST_HEAD(&card->platform_dev_list);

1700 1701
	soc_init_card_debugfs(card);

1702 1703 1704 1705 1706 1707 1708
	ret = snd_soc_register_card(card);
	if (ret != 0) {
		dev_err(&pdev->dev, "Failed to register card\n");
		return ret;
	}

	return 0;
F
Frank Mandarino 已提交
1709 1710 1711 1712 1713
}

/* removes a socdev */
static int soc_remove(struct platform_device *pdev)
{
1714
	struct snd_soc_card *card = platform_get_drvdata(pdev);
F
Frank Mandarino 已提交
1715 1716
	int i;

1717
		if (card->instantiated) {
1718

1719 1720 1721 1722
		/* make sure any delayed work runs */
		for (i = 0; i < card->num_rtd; i++) {
			struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
			run_delayed_work(&rtd->delayed_work);
1723
		}
F
Frank Mandarino 已提交
1724

1725 1726 1727 1728
		/* remove and free each DAI */
		for (i = 0; i < card->num_rtd; i++)
			soc_remove_dai_link(card, i);

1729 1730
		soc_cleanup_card_debugfs(card);

1731
		/* remove the card */
1732 1733
		if (card->remove)
			card->remove(pdev);
F
Frank Mandarino 已提交
1734

1735 1736 1737
		kfree(card->rtd);
		snd_card_free(card->snd_card);
	}
M
Mark Brown 已提交
1738
	snd_soc_unregister_card(card);
F
Frank Mandarino 已提交
1739 1740 1741
	return 0;
}

M
Mark Brown 已提交
1742
static int soc_poweroff(struct device *dev)
M
Mark Brown 已提交
1743
{
M
Mark Brown 已提交
1744
	struct platform_device *pdev = to_platform_device(dev);
1745 1746
	struct snd_soc_card *card = platform_get_drvdata(pdev);
	int i;
M
Mark Brown 已提交
1747 1748

	if (!card->instantiated)
M
Mark Brown 已提交
1749
		return 0;
M
Mark Brown 已提交
1750 1751 1752

	/* Flush out pmdown_time work - we actually do want to run it
	 * now, we're shutting down so no imminent restart. */
1753 1754 1755 1756
	for (i = 0; i < card->num_rtd; i++) {
		struct snd_soc_pcm_runtime *rtd = &card->rtd[i];
		run_delayed_work(&rtd->delayed_work);
	}
M
Mark Brown 已提交
1757

1758
	snd_soc_dapm_shutdown(card);
M
Mark Brown 已提交
1759 1760

	return 0;
M
Mark Brown 已提交
1761 1762
}

1763
static const struct dev_pm_ops soc_pm_ops = {
M
Mark Brown 已提交
1764 1765 1766 1767 1768
	.suspend = soc_suspend,
	.resume = soc_resume,
	.poweroff = soc_poweroff,
};

F
Frank Mandarino 已提交
1769 1770 1771 1772
/* ASoC platform driver */
static struct platform_driver soc_driver = {
	.driver		= {
		.name		= "soc-audio",
1773
		.owner		= THIS_MODULE,
M
Mark Brown 已提交
1774
		.pm		= &soc_pm_ops,
F
Frank Mandarino 已提交
1775 1776 1777 1778 1779 1780
	},
	.probe		= soc_probe,
	.remove		= soc_remove,
};

/* create a new pcm */
1781 1782 1783 1784 1785 1786
static int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
{
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_platform *platform = rtd->platform;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
F
Frank Mandarino 已提交
1787 1788 1789 1790 1791
	struct snd_pcm *pcm;
	char new_name[64];
	int ret = 0, playback = 0, capture = 0;

	/* check client and interface hw capabilities */
1792
	snprintf(new_name, sizeof(new_name), "%s %s-%d",
1793
			rtd->dai_link->stream_name, codec_dai->name, num);
F
Frank Mandarino 已提交
1794

1795
	if (codec_dai->driver->playback.channels_min)
F
Frank Mandarino 已提交
1796
		playback = 1;
1797
	if (codec_dai->driver->capture.channels_min)
F
Frank Mandarino 已提交
1798 1799
		capture = 1;

1800 1801 1802
	dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
	ret = snd_pcm_new(rtd->card->snd_card, new_name,
			num, playback, capture, &pcm);
F
Frank Mandarino 已提交
1803
	if (ret < 0) {
1804
		printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
F
Frank Mandarino 已提交
1805 1806 1807
		return ret;
	}

1808
	rtd->pcm = pcm;
F
Frank Mandarino 已提交
1809
	pcm->private_data = rtd;
1810 1811 1812 1813 1814 1815 1816
	soc_pcm_ops.mmap = platform->driver->ops->mmap;
	soc_pcm_ops.pointer = platform->driver->ops->pointer;
	soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
	soc_pcm_ops.copy = platform->driver->ops->copy;
	soc_pcm_ops.silence = platform->driver->ops->silence;
	soc_pcm_ops.ack = platform->driver->ops->ack;
	soc_pcm_ops.page = platform->driver->ops->page;
F
Frank Mandarino 已提交
1817 1818 1819 1820 1821 1822 1823

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

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

1824
	ret = platform->driver->pcm_new(rtd->card->snd_card, codec_dai, pcm);
F
Frank Mandarino 已提交
1825 1826 1827 1828 1829
	if (ret < 0) {
		printk(KERN_ERR "asoc: platform pcm constructor failed\n");
		return ret;
	}

1830
	pcm->private_free = platform->driver->pcm_free;
F
Frank Mandarino 已提交
1831 1832 1833 1834 1835
	printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
		cpu_dai->name);
	return ret;
}

1836 1837 1838 1839 1840 1841 1842 1843 1844 1845
/**
 * 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.
 */
int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
{
1846 1847
	if (codec->driver->volatile_register)
		return codec->driver->volatile_register(reg);
1848 1849 1850 1851 1852
	else
		return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);

F
Frank Mandarino 已提交
1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881
/**
 * 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;
1882 1883 1884 1885 1886 1887 1888

	/*
	 * 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
1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902
	mutex_unlock(&codec->mutex);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);

/**
 * snd_soc_free_ac97_codec - free AC97 codec device
 * @codec: audio codec
 *
 * Frees AC97 codec device resources.
 */
void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
{
	mutex_lock(&codec->mutex);
1903 1904 1905
#ifdef CONFIG_SND_SOC_AC97_BUS
	soc_unregister_ac97_dai_link(codec);
#endif
F
Frank Mandarino 已提交
1906 1907 1908
	kfree(codec->ac97->bus);
	kfree(codec->ac97);
	codec->ac97 = NULL;
1909
	codec->ac97_created = 0;
F
Frank Mandarino 已提交
1910 1911 1912 1913
	mutex_unlock(&codec->mutex);
}
EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);

1914 1915 1916 1917 1918 1919
unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg)
{
	unsigned int ret;

	ret = codec->driver->read(codec, reg);
	dev_dbg(codec->dev, "read %x => %x\n", reg, ret);
1920
	trace_snd_soc_reg_read(codec, reg, ret);
1921 1922 1923 1924 1925 1926 1927 1928 1929

	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);
1930
	trace_snd_soc_reg_write(codec, reg, val);
1931 1932 1933 1934
	return codec->driver->write(codec, reg, val);
}
EXPORT_SYMBOL_GPL(snd_soc_write);

F
Frank Mandarino 已提交
1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946
/**
 * snd_soc_update_bits - update codec register bits
 * @codec: audio codec
 * @reg: codec register
 * @mask: register mask
 * @value: new value
 *
 * Writes new register value.
 *
 * Returns 1 for change else 0.
 */
int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1947
				unsigned int mask, unsigned int value)
F
Frank Mandarino 已提交
1948 1949
{
	int change;
1950
	unsigned int old, new;
F
Frank Mandarino 已提交
1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961

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

	return change;
}
EXPORT_SYMBOL_GPL(snd_soc_update_bits);

1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972
/**
 * 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.
 */
1973 1974 1975
int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
			       unsigned short reg, unsigned int mask,
			       unsigned int value)
1976 1977 1978 1979 1980 1981 1982 1983 1984
{
	int change;

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

	return change;
}
1985
EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
1986

F
Frank Mandarino 已提交
1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999
/**
 * 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,
2000
				unsigned int mask, unsigned int value)
F
Frank Mandarino 已提交
2001 2002
{
	int change;
2003
	unsigned int old, new;
F
Frank Mandarino 已提交
2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039

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

	return change;
}
EXPORT_SYMBOL_GPL(snd_soc_test_bits);

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

/**
 * snd_soc_cnew - create new control
 * @_template: control template
 * @data: control private data
M
Mark Brown 已提交
2040
 * @long_name: control long name
F
Frank Mandarino 已提交
2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059
 *
 * Create a new mixer control from a template control.
 *
 * Returns 0 for success, else error.
 */
struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
	void *data, char *long_name)
{
	struct snd_kcontrol_new template;

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

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

I
Ian Molton 已提交
2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073
/**
 * snd_soc_add_controls - add an array of controls to a codec.
 * Convienience function to add a list of controls. Many codecs were
 * duplicating this code.
 *
 * @codec: codec to add controls to
 * @controls: array of controls to add
 * @num_controls: number of elements in the array
 *
 * Return 0 for success, else error.
 */
int snd_soc_add_controls(struct snd_soc_codec *codec,
	const struct snd_kcontrol_new *controls, int num_controls)
{
2074
	struct snd_card *card = codec->card->snd_card;
I
Ian Molton 已提交
2075 2076 2077 2078 2079 2080
	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, codec, NULL));
		if (err < 0) {
2081 2082
			dev_err(codec->dev, "%s: Failed to add %s: %d\n",
				codec->name, control->name, err);
I
Ian Molton 已提交
2083 2084 2085 2086 2087 2088 2089 2090
			return err;
		}
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_add_controls);

F
Frank Mandarino 已提交
2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107
/**
 * 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;
2108
	uinfo->value.enumerated.items = e->max;
F
Frank Mandarino 已提交
2109

2110 2111
	if (uinfo->value.enumerated.item > e->max - 1)
		uinfo->value.enumerated.item = e->max - 1;
F
Frank Mandarino 已提交
2112 2113 2114 2115 2116 2117 2118 2119 2120
	strcpy(uinfo->value.enumerated.name,
		e->texts[uinfo->value.enumerated.item]);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);

/**
 * snd_soc_get_enum_double - enumerated double mixer get callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2121
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2122 2123 2124 2125 2126 2127 2128 2129 2130 2131
 *
 * 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;
2132
	unsigned int val, bitmask;
F
Frank Mandarino 已提交
2133

2134
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
Frank Mandarino 已提交
2135 2136
		;
	val = snd_soc_read(codec, e->reg);
2137 2138
	ucontrol->value.enumerated.item[0]
		= (val >> e->shift_l) & (bitmask - 1);
F
Frank Mandarino 已提交
2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149
	if (e->shift_l != e->shift_r)
		ucontrol->value.enumerated.item[1] =
			(val >> e->shift_r) & (bitmask - 1);

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);

/**
 * snd_soc_put_enum_double - enumerated double mixer put callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2150
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2151 2152 2153 2154 2155 2156 2157 2158 2159 2160
 *
 * 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;
2161 2162
	unsigned int val;
	unsigned int mask, bitmask;
F
Frank Mandarino 已提交
2163

2164
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
Frank Mandarino 已提交
2165
		;
2166
	if (ucontrol->value.enumerated.item[0] > e->max - 1)
F
Frank Mandarino 已提交
2167 2168 2169 2170
		return -EINVAL;
	val = ucontrol->value.enumerated.item[0] << e->shift_l;
	mask = (bitmask - 1) << e->shift_l;
	if (e->shift_l != e->shift_r) {
2171
		if (ucontrol->value.enumerated.item[1] > e->max - 1)
F
Frank Mandarino 已提交
2172 2173 2174 2175 2176
			return -EINVAL;
		val |= ucontrol->value.enumerated.item[1] << e->shift_r;
		mask |= (bitmask - 1) << e->shift_r;
	}

2177
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
F
Frank Mandarino 已提交
2178 2179 2180
}
EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);

P
Peter Ujfalusi 已提交
2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196
/**
 * 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);
2197
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2198
	unsigned int reg_val, val, mux;
P
Peter Ujfalusi 已提交
2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235

	reg_val = snd_soc_read(codec, e->reg);
	val = (reg_val >> e->shift_l) & e->mask;
	for (mux = 0; mux < e->max; mux++) {
		if (val == e->values[mux])
			break;
	}
	ucontrol->value.enumerated.item[0] = mux;
	if (e->shift_l != e->shift_r) {
		val = (reg_val >> e->shift_r) & e->mask;
		for (mux = 0; mux < e->max; mux++) {
			if (val == e->values[mux])
				break;
		}
		ucontrol->value.enumerated.item[1] = mux;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);

/**
 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
 * @kcontrol: mixer control
 * @ucontrol: control element information
 *
 * Callback to set the value of a double semi enumerated mixer.
 *
 * Semi enumerated mixer: the enumerated items are referred as values. Can be
 * used for handling bitfield coded enumeration for example.
 *
 * Returns 0 for success.
 */
int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2236
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
2237 2238
	unsigned int val;
	unsigned int mask;
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Peter Ujfalusi 已提交
2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250

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

2251
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
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}
EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);

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

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
2272
	uinfo->value.enumerated.items = e->max;
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2273

2274 2275
	if (uinfo->value.enumerated.item > e->max - 1)
		uinfo->value.enumerated.item = e->max - 1;
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2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293
	strcpy(uinfo->value.enumerated.name,
		e->texts[uinfo->value.enumerated.item]);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);

/**
 * snd_soc_info_volsw_ext - external single mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a single external mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
P
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2294 2295
	int max = kcontrol->private_value;

2296
	if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
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2297 2298 2299
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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2300 2301 2302

	uinfo->count = 1;
	uinfo->value.integer.min = 0;
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2303
	uinfo->value.integer.max = max;
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	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);

/**
 * snd_soc_info_volsw - single mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a single mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
2320 2321
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2322
	int platform_max;
2323
	unsigned int shift = mc->shift;
2324
	unsigned int rshift = mc->rshift;
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2326 2327 2328 2329 2330
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

	if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
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2331 2332 2333 2334
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;

F
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2335 2336
	uinfo->count = shift == rshift ? 1 : 2;
	uinfo->value.integer.min = 0;
2337
	uinfo->value.integer.max = platform_max;
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2338 2339 2340 2341 2342 2343 2344
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw);

/**
 * snd_soc_get_volsw - single mixer get callback
 * @kcontrol: mixer control
M
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 * @ucontrol: control element information
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2346 2347 2348 2349 2350 2351 2352 2353
 *
 * Callback to get the value of a single mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2354 2355
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2356
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2357 2358 2359
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
2360
	int max = mc->max;
2361 2362
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
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	ucontrol->value.integer.value[0] =
		(snd_soc_read(codec, reg) >> shift) & mask;
	if (shift != rshift)
		ucontrol->value.integer.value[1] =
			(snd_soc_read(codec, reg) >> rshift) & mask;
	if (invert) {
		ucontrol->value.integer.value[0] =
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			max - ucontrol->value.integer.value[0];
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2372 2373
		if (shift != rshift)
			ucontrol->value.integer.value[1] =
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2374
				max - ucontrol->value.integer.value[1];
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	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw);

/**
 * snd_soc_put_volsw - single mixer put callback
 * @kcontrol: mixer control
M
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 * @ucontrol: control element information
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2385 2386 2387 2388 2389 2390 2391 2392
 *
 * Callback to set the value of a single mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2393 2394
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
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2395
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2396 2397 2398
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
2399
	int max = mc->max;
2400 2401
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
2402
	unsigned int val, val2, val_mask;
F
Frank Mandarino 已提交
2403 2404 2405

	val = (ucontrol->value.integer.value[0] & mask);
	if (invert)
P
Philipp Zabel 已提交
2406
		val = max - val;
F
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2407 2408 2409 2410 2411
	val_mask = mask << shift;
	val = val << shift;
	if (shift != rshift) {
		val2 = (ucontrol->value.integer.value[1] & mask);
		if (invert)
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Philipp Zabel 已提交
2412
			val2 = max - val2;
F
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2413 2414 2415
		val_mask |= mask << rshift;
		val |= val2 << rshift;
	}
2416
	return snd_soc_update_bits_locked(codec, reg, val_mask, val);
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}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw);

/**
 * snd_soc_info_volsw_2r - double mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a double mixer control that
 * spans 2 codec registers.
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
2433 2434
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2435
	int platform_max;
P
Philipp Zabel 已提交
2436

2437 2438 2439 2440 2441
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

	if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
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2442 2443 2444
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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2445 2446 2447

	uinfo->count = 2;
	uinfo->value.integer.min = 0;
2448
	uinfo->value.integer.max = platform_max;
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	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);

/**
 * snd_soc_get_volsw_2r - double mixer get callback
 * @kcontrol: mixer control
M
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 * @ucontrol: control element information
F
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2457 2458 2459 2460 2461 2462 2463 2464
 *
 * Callback to get the value of a double mixer control that spans 2 registers.
 *
 * Returns 0 for success.
 */
int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2465 2466
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
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	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2468 2469 2470
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
2471
	int max = mc->max;
2472
	unsigned int mask = (1 << fls(max)) - 1;
2473
	unsigned int invert = mc->invert;
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	ucontrol->value.integer.value[0] =
		(snd_soc_read(codec, reg) >> shift) & mask;
	ucontrol->value.integer.value[1] =
		(snd_soc_read(codec, reg2) >> shift) & mask;
	if (invert) {
		ucontrol->value.integer.value[0] =
P
Philipp Zabel 已提交
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			max - ucontrol->value.integer.value[0];
F
Frank Mandarino 已提交
2482
		ucontrol->value.integer.value[1] =
P
Philipp Zabel 已提交
2483
			max - ucontrol->value.integer.value[1];
F
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2484 2485 2486 2487 2488 2489 2490 2491 2492
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);

/**
 * snd_soc_put_volsw_2r - double mixer set callback
 * @kcontrol: mixer control
M
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2493
 * @ucontrol: control element information
F
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2494 2495 2496 2497 2498 2499 2500 2501
 *
 * Callback to set the value of a double mixer control that spans 2 registers.
 *
 * Returns 0 for success.
 */
int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2502 2503
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2504
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2505 2506 2507
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
2508
	int max = mc->max;
2509 2510
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2511
	int err;
2512
	unsigned int val, val2, val_mask;
F
Frank Mandarino 已提交
2513 2514 2515 2516 2517 2518

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

	if (invert) {
P
Philipp Zabel 已提交
2519 2520
		val = max - val;
		val2 = max - val2;
F
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2521 2522 2523 2524 2525
	}

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

2526
	err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2527
	if (err < 0)
F
Frank Mandarino 已提交
2528 2529
		return err;

2530
	err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
F
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2531 2532 2533 2534
	return err;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);

2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546
/**
 * 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)
{
2547 2548
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2549
	int platform_max;
2550
	int min = mc->min;
2551

2552 2553 2554 2555
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

2556 2557 2558
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
2559
	uinfo->value.integer.max = platform_max - min;
2560 2561 2562 2563 2564 2565 2566
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);

/**
 * snd_soc_get_volsw_s8 - signed mixer get callback
 * @kcontrol: mixer control
M
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 * @ucontrol: control element information
2568 2569 2570 2571 2572 2573 2574 2575
 *
 * 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)
{
2576 2577
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2578
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2579
	unsigned int reg = mc->reg;
2580
	int min = mc->min;
2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593
	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
2594
 * @ucontrol: control element information
2595 2596 2597 2598 2599 2600 2601 2602
 *
 * 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)
{
2603 2604
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2605
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2606
	unsigned int reg = mc->reg;
2607
	int min = mc->min;
2608
	unsigned int val;
2609 2610 2611 2612

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

2613
	return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2614 2615 2616
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);

2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628
/**
 * 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)
{
2629
	struct snd_card *card = codec->card->snd_card;
2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647
	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) {
2648
			mc->platform_max = max;
2649 2650 2651 2652 2653 2654 2655
			ret = 0;
		}
	}
	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_limit_volume);

2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 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 2699
/**
 * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
 *  mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_info *uinfo)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int max = mc->max;
	int min = mc->min;

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

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);

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

2700 2701
	ucontrol->value.integer.value[0] = ((val & 0xff)-min) & mask;
	ucontrol->value.integer.value[1] = ((valr & 0xff)-min) & mask;
2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);

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

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

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

	ret = 0;
	if (oval != val) {
		ret = snd_soc_write(codec, mc->reg, val);
		if (ret < 0)
2737
			return ret;
2738 2739 2740 2741
	}
	if (ovalr != valr) {
		ret = snd_soc_write(codec, mc->rreg, valr);
		if (ret < 0)
2742
			return ret;
2743 2744 2745 2746 2747 2748
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);

2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760
/**
 * 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)
{
2761 2762
	if (dai->driver && dai->driver->ops->set_sysclk)
		return dai->driver->ops->set_sysclk(dai, clk_id, freq, dir);
2763 2764 2765 2766 2767 2768 2769 2770
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);

/**
 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
 * @dai: DAI
M
Mark Brown 已提交
2771
 * @div_id: DAI specific clock divider ID
2772 2773 2774 2775 2776 2777 2778 2779 2780
 * @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)
{
2781 2782
	if (dai->driver && dai->driver->ops->set_clkdiv)
		return dai->driver->ops->set_clkdiv(dai, div_id, div);
2783 2784 2785 2786 2787 2788 2789 2790 2791
	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
2792
 * @source: DAI specific source for the PLL
2793 2794 2795 2796 2797
 * @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.
 */
2798 2799
int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
	unsigned int freq_in, unsigned int freq_out)
2800
{
2801 2802
	if (dai->driver && dai->driver->ops->set_pll)
		return dai->driver->ops->set_pll(dai, pll_id, source,
2803
					 freq_in, freq_out);
2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);

/**
 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
 * @dai: DAI
 * @fmt: SND_SOC_DAIFMT_ format value.
 *
 * Configures the DAI hardware format and clocking.
 */
int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
2818 2819
	if (dai->driver && dai->driver->ops->set_fmt)
		return dai->driver->ops->set_fmt(dai, fmt);
2820 2821 2822 2823 2824 2825 2826 2827
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);

/**
 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
 * @dai: DAI
2828 2829
 * @tx_mask: bitmask representing active TX slots.
 * @rx_mask: bitmask representing active RX slots.
2830
 * @slots: Number of slots in use.
2831
 * @slot_width: Width in bits for each slot.
2832 2833 2834 2835 2836
 *
 * 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,
2837
	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2838
{
2839 2840
	if (dai->driver && dai->driver->ops->set_tdm_slot)
		return dai->driver->ops->set_tdm_slot(dai, tx_mask, rx_mask,
2841
				slots, slot_width);
2842 2843 2844 2845 2846
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);

2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862
/**
 * 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)
{
2863 2864
	if (dai->driver && dai->driver->ops->set_channel_map)
		return dai->driver->ops->set_channel_map(dai, tx_num, tx_slot,
2865 2866 2867 2868 2869 2870
			rx_num, rx_slot);
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);

2871 2872 2873 2874 2875 2876 2877 2878 2879
/**
 * 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)
{
2880 2881
	if (dai->driver && dai->driver->ops->set_tristate)
		return dai->driver->ops->set_tristate(dai, tristate);
2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);

/**
 * snd_soc_dai_digital_mute - configure DAI system or master clock.
 * @dai: DAI
 * @mute: mute enable
 *
 * Mutes the DAI DAC.
 */
int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
{
2896 2897
	if (dai->driver && dai->driver->ops->digital_mute)
		return dai->driver->ops->digital_mute(dai, mute);
2898 2899 2900 2901 2902
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);

M
Mark Brown 已提交
2903 2904 2905
/**
 * snd_soc_register_card - Register a card with the ASoC core
 *
M
Mark Brown 已提交
2906
 * @card: Card to register
M
Mark Brown 已提交
2907 2908 2909 2910 2911 2912 2913
 *
 * Note that currently this is an internal only function: it will be
 * exposed to machine drivers after further backporting of ASoC v2
 * registration APIs.
 */
static int snd_soc_register_card(struct snd_soc_card *card)
{
2914 2915
	int i;

M
Mark Brown 已提交
2916 2917 2918
	if (!card->name || !card->dev)
		return -EINVAL;

2919 2920 2921 2922 2923 2924 2925 2926
	card->rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime) * card->num_links,
			GFP_KERNEL);
	if (card->rtd == NULL)
		return -ENOMEM;

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

M
Mark Brown 已提交
2927 2928
	INIT_LIST_HEAD(&card->list);
	card->instantiated = 0;
2929
	mutex_init(&card->mutex);
M
Mark Brown 已提交
2930 2931 2932

	mutex_lock(&client_mutex);
	list_add(&card->list, &card_list);
2933
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
2934 2935 2936 2937 2938 2939 2940 2941 2942 2943
	mutex_unlock(&client_mutex);

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

	return 0;
}

/**
 * snd_soc_unregister_card - Unregister a card with the ASoC core
 *
M
Mark Brown 已提交
2944
 * @card: Card to unregister
M
Mark Brown 已提交
2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959
 *
 * Note that currently this is an internal only function: it will be
 * exposed to machine drivers after further backporting of ASoC v2
 * registration APIs.
 */
static int snd_soc_unregister_card(struct snd_soc_card *card)
{
	mutex_lock(&client_mutex);
	list_del(&card->list);
	mutex_unlock(&client_mutex);
	dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);

	return 0;
}

2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990
/*
 * Simplify DAI link configuration by removing ".-1" from device names
 * and sanitizing names.
 */
static inline char *fmt_single_name(struct device *dev, int *id)
{
	char *found, name[NAME_SIZE];
	int id1, id2;

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

	strncpy(name, dev_name(dev), NAME_SIZE);

	/* 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 */
2991
			*id = ((id1 & 0xffff) << 16) + id2;
2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018

			/* sanitize component name for DAI link creation */
			snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name, name);
			strncpy(name, tmp, NAME_SIZE);
		} else
			*id = 0;
	}

	return kstrdup(name, GFP_KERNEL);
}

/*
 * Simplify DAI link naming for single devices with multiple DAIs by removing
 * any ".-1" and using the DAI name (instead of device name).
 */
static inline char *fmt_multiple_name(struct device *dev,
		struct snd_soc_dai_driver *dai_drv)
{
	if (dai_drv->name == NULL) {
		printk(KERN_ERR "asoc: error - multiple DAI %s registered with no name\n",
				dev_name(dev));
		return NULL;
	}

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

M
Mark Brown 已提交
3019 3020 3021
/**
 * snd_soc_register_dai - Register a DAI with the ASoC core
 *
M
Mark Brown 已提交
3022
 * @dai: DAI to register
M
Mark Brown 已提交
3023
 */
3024 3025
int snd_soc_register_dai(struct device *dev,
		struct snd_soc_dai_driver *dai_drv)
M
Mark Brown 已提交
3026
{
3027 3028 3029
	struct snd_soc_dai *dai;

	dev_dbg(dev, "dai register %s\n", dev_name(dev));
M
Mark Brown 已提交
3030

3031 3032 3033
	dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
	if (dai == NULL)
			return -ENOMEM;
M
Mark Brown 已提交
3034

3035 3036 3037 3038 3039 3040
	/* create DAI component name */
	dai->name = fmt_single_name(dev, &dai->id);
	if (dai->name == NULL) {
		kfree(dai);
		return -ENOMEM;
	}
3041

3042 3043 3044 3045
	dai->dev = dev;
	dai->driver = dai_drv;
	if (!dai->driver->ops)
		dai->driver->ops = &null_dai_ops;
M
Mark Brown 已提交
3046 3047 3048

	mutex_lock(&client_mutex);
	list_add(&dai->list, &dai_list);
3049
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060
	mutex_unlock(&client_mutex);

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

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_register_dai);

/**
 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
 *
M
Mark Brown 已提交
3061
 * @dai: DAI to unregister
M
Mark Brown 已提交
3062
 */
3063
void snd_soc_unregister_dai(struct device *dev)
M
Mark Brown 已提交
3064
{
3065 3066 3067 3068 3069 3070 3071 3072 3073
	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
3074 3075 3076 3077 3078
	mutex_lock(&client_mutex);
	list_del(&dai->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered DAI '%s'\n", dai->name);
3079 3080
	kfree(dai->name);
	kfree(dai);
M
Mark Brown 已提交
3081 3082 3083 3084 3085 3086
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);

/**
 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
 *
M
Mark Brown 已提交
3087 3088
 * @dai: Array of DAIs to register
 * @count: Number of DAIs
M
Mark Brown 已提交
3089
 */
3090 3091
int snd_soc_register_dais(struct device *dev,
		struct snd_soc_dai_driver *dai_drv, size_t count)
M
Mark Brown 已提交
3092
{
3093 3094 3095
	struct snd_soc_dai *dai;
	int i, ret = 0;

3096
	dev_dbg(dev, "dai register %s #%Zu\n", dev_name(dev), count);
M
Mark Brown 已提交
3097 3098

	for (i = 0; i < count; i++) {
3099 3100

		dai = kzalloc(sizeof(struct snd_soc_dai), GFP_KERNEL);
3101 3102 3103 3104
		if (dai == NULL) {
			ret = -ENOMEM;
			goto err;
		}
3105 3106 3107 3108 3109 3110

		/* 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
3111
			goto err;
3112 3113 3114 3115
		}

		dai->dev = dev;
		dai->driver = &dai_drv[i];
3116 3117 3118 3119
		if (dai->driver->id)
			dai->id = dai->driver->id;
		else
			dai->id = i;
3120 3121 3122 3123 3124 3125 3126 3127
		if (!dai->driver->ops)
			dai->driver->ops = &null_dai_ops;

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

		pr_debug("Registered DAI '%s'\n", dai->name);
M
Mark Brown 已提交
3128 3129
	}

3130
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
3131 3132 3133 3134
	return 0;

err:
	for (i--; i >= 0; i--)
3135
		snd_soc_unregister_dai(dev);
M
Mark Brown 已提交
3136 3137 3138 3139 3140 3141 3142 3143

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_register_dais);

/**
 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
 *
M
Mark Brown 已提交
3144 3145
 * @dai: Array of DAIs to unregister
 * @count: Number of DAIs
M
Mark Brown 已提交
3146
 */
3147
void snd_soc_unregister_dais(struct device *dev, size_t count)
M
Mark Brown 已提交
3148 3149 3150 3151
{
	int i;

	for (i = 0; i < count; i++)
3152
		snd_soc_unregister_dai(dev);
M
Mark Brown 已提交
3153 3154 3155
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);

M
Mark Brown 已提交
3156 3157 3158
/**
 * snd_soc_register_platform - Register a platform with the ASoC core
 *
M
Mark Brown 已提交
3159
 * @platform: platform to register
M
Mark Brown 已提交
3160
 */
3161 3162
int snd_soc_register_platform(struct device *dev,
		struct snd_soc_platform_driver *platform_drv)
M
Mark Brown 已提交
3163
{
3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177
	struct snd_soc_platform *platform;

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

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

	/* create platform component name */
	platform->name = fmt_single_name(dev, &platform->id);
	if (platform->name == NULL) {
		kfree(platform);
		return -ENOMEM;
	}
M
Mark Brown 已提交
3178

3179 3180
	platform->dev = dev;
	platform->driver = platform_drv;
M
Mark Brown 已提交
3181 3182 3183

	mutex_lock(&client_mutex);
	list_add(&platform->list, &platform_list);
3184
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195
	mutex_unlock(&client_mutex);

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

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_register_platform);

/**
 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
 *
M
Mark Brown 已提交
3196
 * @platform: platform to unregister
M
Mark Brown 已提交
3197
 */
3198
void snd_soc_unregister_platform(struct device *dev)
M
Mark Brown 已提交
3199
{
3200 3201 3202 3203 3204 3205 3206 3207 3208
	struct snd_soc_platform *platform;

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

found:
M
Mark Brown 已提交
3209 3210 3211 3212 3213
	mutex_lock(&client_mutex);
	list_del(&platform->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered platform '%s'\n", platform->name);
3214 3215
	kfree(platform->name);
	kfree(platform);
M
Mark Brown 已提交
3216 3217 3218
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);

3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251
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
3252 3253 3254
/**
 * snd_soc_register_codec - Register a codec with the ASoC core
 *
M
Mark Brown 已提交
3255
 * @codec: codec to register
M
Mark Brown 已提交
3256
 */
3257 3258 3259
int snd_soc_register_codec(struct device *dev,
		struct snd_soc_codec_driver *codec_drv,
		struct snd_soc_dai_driver *dai_drv, int num_dai)
M
Mark Brown 已提交
3260
{
3261 3262
	struct snd_soc_codec *codec;
	int ret, i;
3263

3264 3265 3266 3267 3268
	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
3269

3270 3271 3272 3273 3274 3275 3276
	/* create CODEC component name */
	codec->name = fmt_single_name(dev, &codec->id);
	if (codec->name == NULL) {
		kfree(codec);
		return -ENOMEM;
	}

L
Liam Girdwood 已提交
3277 3278 3279 3280 3281
	INIT_LIST_HEAD(&codec->dapm.widgets);
	INIT_LIST_HEAD(&codec->dapm.paths);
	codec->dapm.bias_level = SND_SOC_BIAS_OFF;
	codec->dapm.dev = dev;
	codec->dapm.codec = codec;
3282 3283 3284 3285
	codec->dev = dev;
	codec->driver = codec_drv;
	codec->num_dai = num_dai;
	mutex_init(&codec->mutex);
L
Liam Girdwood 已提交
3286

3287 3288
	/* allocate CODEC register cache */
	if (codec_drv->reg_cache_size && codec_drv->reg_word_size) {
3289 3290 3291 3292 3293
		ret = snd_soc_cache_init(codec);
		if (ret < 0) {
			dev_err(codec->dev, "Failed to set cache compression type: %d\n",
				ret);
			goto error_cache;
3294
		}
3295 3296
	}

3297 3298 3299 3300 3301
	for (i = 0; i < num_dai; i++) {
		fixup_codec_formats(&dai_drv[i].playback);
		fixup_codec_formats(&dai_drv[i].capture);
	}

3302 3303 3304 3305
	/* register any DAIs */
	if (num_dai) {
		ret = snd_soc_register_dais(dev, dai_drv, num_dai);
		if (ret < 0)
3306
			goto error_dais;
3307
	}
3308

M
Mark Brown 已提交
3309 3310 3311 3312 3313 3314 3315
	mutex_lock(&client_mutex);
	list_add(&codec->list, &codec_list);
	snd_soc_instantiate_cards();
	mutex_unlock(&client_mutex);

	pr_debug("Registered codec '%s'\n", codec->name);
	return 0;
3316

3317 3318 3319
error_dais:
	snd_soc_cache_exit(codec);
error_cache:
3320 3321 3322
	kfree(codec->name);
	kfree(codec);
	return ret;
M
Mark Brown 已提交
3323 3324 3325 3326 3327 3328
}
EXPORT_SYMBOL_GPL(snd_soc_register_codec);

/**
 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
 *
M
Mark Brown 已提交
3329
 * @codec: codec to unregister
M
Mark Brown 已提交
3330
 */
3331
void snd_soc_unregister_codec(struct device *dev)
M
Mark Brown 已提交
3332
{
3333 3334 3335 3336 3337 3338 3339 3340 3341 3342
	struct snd_soc_codec *codec;
	int i;

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

found:
3343 3344 3345
	if (codec->num_dai)
		for (i = 0; i < codec->num_dai; i++)
			snd_soc_unregister_dai(dev);
3346

M
Mark Brown 已提交
3347 3348 3349 3350 3351
	mutex_lock(&client_mutex);
	list_del(&codec->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered codec '%s'\n", codec->name);
3352

3353
	snd_soc_cache_exit(codec);
3354
	kfree(codec->name);
3355
	kfree(codec);
M
Mark Brown 已提交
3356 3357 3358
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);

3359
static int __init snd_soc_init(void)
F
Frank Mandarino 已提交
3360
{
3361 3362 3363 3364 3365 3366 3367
#ifdef CONFIG_DEBUG_FS
	debugfs_root = debugfs_create_dir("asoc", NULL);
	if (IS_ERR(debugfs_root) || !debugfs_root) {
		printk(KERN_WARNING
		       "ASoC: Failed to create debugfs directory\n");
		debugfs_root = NULL;
	}
3368 3369 3370 3371 3372

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

M
Mark Brown 已提交
3373 3374 3375
	if (!debugfs_create_file("dais", 0444, debugfs_root, NULL,
				 &dai_list_fops))
		pr_warn("ASoC: Failed to create DAI list debugfs file\n");
3376 3377 3378 3379

	if (!debugfs_create_file("platforms", 0444, debugfs_root, NULL,
				 &platform_list_fops))
		pr_warn("ASoC: Failed to create platform list debugfs file\n");
3380 3381
#endif

F
Frank Mandarino 已提交
3382 3383
	return platform_driver_register(&soc_driver);
}
3384
module_init(snd_soc_init);
F
Frank Mandarino 已提交
3385

M
Mark Brown 已提交
3386
static void __exit snd_soc_exit(void)
F
Frank Mandarino 已提交
3387
{
3388 3389 3390
#ifdef CONFIG_DEBUG_FS
	debugfs_remove_recursive(debugfs_root);
#endif
3391
	platform_driver_unregister(&soc_driver);
F
Frank Mandarino 已提交
3392 3393 3394 3395
}
module_exit(snd_soc_exit);

/* Module information */
3396
MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
F
Frank Mandarino 已提交
3397 3398
MODULE_DESCRIPTION("ALSA SoC Core");
MODULE_LICENSE("GPL");
3399
MODULE_ALIAS("platform:soc-audio");