[deliverable/linux.git] / sound / soc / codecs / ak4535.c

/*
 * ak4535.c  --  AK4535 ALSA Soc Audio driver
 *
 * Copyright 2005 Openedhand Ltd.
 *
 * Author: Richard Purdie <richard@openedhand.com>
 *
 * Based on wm8753.c by Liam Girdwood
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#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>

#include "ak4535.h"

#define AK4535_VERSION "0.3"

struct snd_soc_codec_device soc_codec_dev_ak4535;

/* codec private data */
struct ak4535_priv {
	unsigned int sysclk;
};

/*
 * ak4535 register cache
 */
static const u16 ak4535_reg[AK4535_CACHEREGNUM] = {
    0x0000, 0x0080, 0x0000, 0x0003,
    0x0002, 0x0000, 0x0011, 0x0001,
    0x0000, 0x0040, 0x0036, 0x0010,
    0x0000, 0x0000, 0x0057, 0x0000,
};

/*
 * read ak4535 register cache
 */
static inline unsigned int ak4535_read_reg_cache(struct snd_soc_codec *codec,
	unsigned int reg)
{
	u16 *cache = codec->reg_cache;
	if (reg >= AK4535_CACHEREGNUM)
		return -1;
	return cache[reg];
}

static inline unsigned int ak4535_read(struct snd_soc_codec *codec,
	unsigned int reg)
{
	u8 data;
	data = reg;

	if (codec->hw_write(codec->control_data, &data, 1) != 1)
		return -EIO;

	if (codec->hw_read(codec->control_data, &data, 1) != 1)
		return -EIO;

	return data;
};

/*
 * write ak4535 register cache
 */
static inline void ak4535_write_reg_cache(struct snd_soc_codec *codec,
	u16 reg, unsigned int value)
{
	u16 *cache = codec->reg_cache;
	if (reg >= AK4535_CACHEREGNUM)
		return;
	cache[reg] = value;
}

/*
 * write to the AK4535 register space
 */
static int ak4535_write(struct snd_soc_codec *codec, unsigned int reg,
	unsigned int value)
{
	u8 data[2];

	/* data is
	 *   D15..D8 AK4535 register offset
	 *   D7...D0 register data
	 */
	data[0] = reg & 0xff;
	data[1] = value & 0xff;

	ak4535_write_reg_cache(codec, reg, value);
	if (codec->hw_write(codec->control_data, data, 2) == 2)
		return 0;
	else
		return -EIO;
}

static int ak4535_sync(struct snd_soc_codec *codec)
{
	u16 *cache = codec->reg_cache;
	int i, r = 0;

	for (i = 0; i < AK4535_CACHEREGNUM; i++)
		r |= ak4535_write(codec, i, cache[i]);

	return r;
};

static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"};
static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"};
static const char *ak4535_hp_out[] = {"Stereo", "Mono"};
static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"};
static const char *ak4535_mic_select[] = {"Internal", "External"};

static const struct soc_enum ak4535_enum[] = {
	SOC_ENUM_SINGLE(AK4535_SIG1, 7, 2, ak4535_mono_gain),
	SOC_ENUM_SINGLE(AK4535_SIG1, 6, 2, ak4535_mono_out),
	SOC_ENUM_SINGLE(AK4535_MODE2, 2, 2, ak4535_hp_out),
	SOC_ENUM_SINGLE(AK4535_DAC, 0, 4, ak4535_deemp),
	SOC_ENUM_SINGLE(AK4535_MIC, 1, 2, ak4535_mic_select),
};

static const struct snd_kcontrol_new ak4535_snd_controls[] = {
	SOC_SINGLE("ALC2 Switch", AK4535_SIG1, 1, 1, 0),
	SOC_ENUM("Mono 1 Output", ak4535_enum[1]),
	SOC_ENUM("Mono 1 Gain", ak4535_enum[0]),
	SOC_ENUM("Headphone Output", ak4535_enum[2]),
	SOC_ENUM("Playback Deemphasis", ak4535_enum[3]),
	SOC_SINGLE("Bass Volume", AK4535_DAC, 2, 3, 0),
	SOC_SINGLE("Mic Boost (+20dB) Switch", AK4535_MIC, 0, 1, 0),
	SOC_ENUM("Mic Select", ak4535_enum[4]),
	SOC_SINGLE("ALC Operation Time", AK4535_TIMER, 0, 3, 0),
	SOC_SINGLE("ALC Recovery Time", AK4535_TIMER, 2, 3, 0),
	SOC_SINGLE("ALC ZC Time", AK4535_TIMER, 4, 3, 0),
	SOC_SINGLE("ALC 1 Switch", AK4535_ALC1, 5, 1, 0),
	SOC_SINGLE("ALC 2 Switch", AK4535_ALC1, 6, 1, 0),
	SOC_SINGLE("ALC Volume", AK4535_ALC2, 0, 127, 0),
	SOC_SINGLE("Capture Volume", AK4535_PGA, 0, 127, 0),
	SOC_SINGLE("Left Playback Volume", AK4535_LATT, 0, 127, 1),
	SOC_SINGLE("Right Playback Volume", AK4535_RATT, 0, 127, 1),
	SOC_SINGLE("AUX Bypass Volume", AK4535_VOL, 0, 15, 0),
	SOC_SINGLE("Mic Sidetone Volume", AK4535_VOL, 4, 7, 0),
};

/* Mono 1 Mixer */
static const struct snd_kcontrol_new ak4535_mono1_mixer_controls[] = {
	SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG1, 4, 1, 0),
	SOC_DAPM_SINGLE("Mono Playback Switch", AK4535_SIG1, 5, 1, 0),
};

/* Stereo Mixer */
static const struct snd_kcontrol_new ak4535_stereo_mixer_controls[] = {
	SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG2, 4, 1, 0),
	SOC_DAPM_SINGLE("Playback Switch", AK4535_SIG2, 7, 1, 0),
	SOC_DAPM_SINGLE("Aux Bypass Switch", AK4535_SIG2, 5, 1, 0),
};

/* Input Mixer */
static const struct snd_kcontrol_new ak4535_input_mixer_controls[] = {
	SOC_DAPM_SINGLE("Mic Capture Switch", AK4535_MIC, 2, 1, 0),
	SOC_DAPM_SINGLE("Aux Capture Switch", AK4535_MIC, 5, 1, 0),
};

/* Input mux */
static const struct snd_kcontrol_new ak4535_input_mux_control =
	SOC_DAPM_ENUM("Input Select", ak4535_enum[4]);

/* HP L switch */
static const struct snd_kcontrol_new ak4535_hpl_control =
	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1);

/* HP R switch */
static const struct snd_kcontrol_new ak4535_hpr_control =
	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1);

/* mono 2 switch */
static const struct snd_kcontrol_new ak4535_mono2_control =
	SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0);

/* Line out switch */
static const struct snd_kcontrol_new ak4535_line_control =
	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0);

/* ak4535 dapm widgets */
static const struct snd_soc_dapm_widget ak4535_dapm_widgets[] = {
	SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
		&ak4535_stereo_mixer_controls[0],
		ARRAY_SIZE(ak4535_stereo_mixer_controls)),
	SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
		&ak4535_mono1_mixer_controls[0],
		ARRAY_SIZE(ak4535_mono1_mixer_controls)),
	SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
		&ak4535_input_mixer_controls[0],
		ARRAY_SIZE(ak4535_input_mixer_controls)),
	SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
		&ak4535_input_mux_control),
	SND_SOC_DAPM_DAC("DAC", "Playback", AK4535_PM2, 0, 0),
	SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
		&ak4535_mono2_control),
	/* speaker powersave bit */
	SND_SOC_DAPM_PGA("Speaker Enable", AK4535_MODE2, 0, 0, NULL, 0),
	SND_SOC_DAPM_SWITCH("Line Out Enable", SND_SOC_NOPM, 0, 0,
		&ak4535_line_control),
	SND_SOC_DAPM_SWITCH("Left HP Enable", SND_SOC_NOPM, 0, 0,
		&ak4535_hpl_control),
	SND_SOC_DAPM_SWITCH("Right HP Enable", SND_SOC_NOPM, 0, 0,
		&ak4535_hpr_control),
	SND_SOC_DAPM_OUTPUT("LOUT"),
	SND_SOC_DAPM_OUTPUT("HPL"),
	SND_SOC_DAPM_OUTPUT("ROUT"),
	SND_SOC_DAPM_OUTPUT("HPR"),
	SND_SOC_DAPM_OUTPUT("SPP"),
	SND_SOC_DAPM_OUTPUT("SPN"),
	SND_SOC_DAPM_OUTPUT("MOUT1"),
	SND_SOC_DAPM_OUTPUT("MOUT2"),
	SND_SOC_DAPM_OUTPUT("MICOUT"),
	SND_SOC_DAPM_ADC("ADC", "Capture", AK4535_PM1, 0, 0),
	SND_SOC_DAPM_PGA("Spk Amp", AK4535_PM2, 3, 0, NULL, 0),
	SND_SOC_DAPM_PGA("HP R Amp", AK4535_PM2, 1, 0, NULL, 0),
	SND_SOC_DAPM_PGA("HP L Amp", AK4535_PM2, 2, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Mic", AK4535_PM1, 1, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Line Out", AK4535_PM1, 4, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Mono Out", AK4535_PM1, 3, 0, NULL, 0),
	SND_SOC_DAPM_PGA("AUX In", AK4535_PM1, 2, 0, NULL, 0),

	SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4535_MIC, 3, 0),
	SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4535_MIC, 4, 0),
	SND_SOC_DAPM_INPUT("MICIN"),
	SND_SOC_DAPM_INPUT("MICEXT"),
	SND_SOC_DAPM_INPUT("AUX"),
	SND_SOC_DAPM_INPUT("MIN"),
	SND_SOC_DAPM_INPUT("AIN"),
};

static const struct snd_soc_dapm_route audio_map[] = {
	/*stereo mixer */
	{"Stereo Mixer", "Playback Switch", "DAC"},
	{"Stereo Mixer", "Mic Sidetone Switch", "Mic"},
	{"Stereo Mixer", "Aux Bypass Switch", "AUX In"},

	/* mono1 mixer */
	{"Mono1 Mixer", "Mic Sidetone Switch", "Mic"},
	{"Mono1 Mixer", "Mono Playback Switch", "DAC"},

	/* Mic */
	{"Mic", NULL, "AIN"},
	{"Input Mux", "Internal", "Mic Int Bias"},
	{"Input Mux", "External", "Mic Ext Bias"},
	{"Mic Int Bias", NULL, "MICIN"},
	{"Mic Ext Bias", NULL, "MICEXT"},
	{"MICOUT", NULL, "Input Mux"},

	/* line out */
	{"LOUT", NULL, "Line Out Enable"},
	{"ROUT", NULL, "Line Out Enable"},
	{"Line Out Enable", "Switch", "Line Out"},
	{"Line Out", NULL, "Stereo Mixer"},

	/* mono1 out */
	{"MOUT1", NULL, "Mono Out"},
	{"Mono Out", NULL, "Mono1 Mixer"},

	/* left HP */
	{"HPL", NULL, "Left HP Enable"},
	{"Left HP Enable", "Switch", "HP L Amp"},
	{"HP L Amp", NULL, "Stereo Mixer"},

	/* right HP */
	{"HPR", NULL, "Right HP Enable"},
	{"Right HP Enable", "Switch", "HP R Amp"},
	{"HP R Amp", NULL, "Stereo Mixer"},

	/* speaker */
	{"SPP", NULL, "Speaker Enable"},
	{"SPN", NULL, "Speaker Enable"},
	{"Speaker Enable", "Switch", "Spk Amp"},
	{"Spk Amp", NULL, "MIN"},

	/* mono 2 */
	{"MOUT2", NULL, "Mono 2 Enable"},
	{"Mono 2 Enable", "Switch", "Stereo Mixer"},

	/* Aux In */
	{"Aux In", NULL, "AUX"},

	/* ADC */
	{"ADC", NULL, "Input Mixer"},
	{"Input Mixer", "Mic Capture Switch", "Mic"},
	{"Input Mixer", "Aux Capture Switch", "Aux In"},
};

static int ak4535_add_widgets(struct snd_soc_codec *codec)
{
	snd_soc_dapm_new_controls(codec, ak4535_dapm_widgets,
				  ARRAY_SIZE(ak4535_dapm_widgets));

	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));

	snd_soc_dapm_new_widgets(codec);
	return 0;
}

static int ak4535_set_dai_sysclk(struct snd_soc_dai *codec_dai,
	int clk_id, unsigned int freq, int dir)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	struct ak4535_priv *ak4535 = codec->private_data;

	ak4535->sysclk = freq;
	return 0;
}

static int ak4535_hw_params(struct snd_pcm_substream *substream,
			    struct snd_pcm_hw_params *params,
			    struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
	struct snd_soc_codec *codec = socdev->card->codec;
	struct ak4535_priv *ak4535 = codec->private_data;
	u8 mode2 = ak4535_read_reg_cache(codec, AK4535_MODE2) & ~(0x3 << 5);
	int rate = params_rate(params), fs = 256;

	if (rate)
		fs = ak4535->sysclk / rate;

	/* set fs */
	switch (fs) {
	case 1024:
		mode2 |= (0x2 << 5);
		break;
	case 512:
		mode2 |= (0x1 << 5);
		break;
	case 256:
		break;
	}

	/* set rate */
	ak4535_write(codec, AK4535_MODE2, mode2);
	return 0;
}

static int ak4535_set_dai_fmt(struct snd_soc_dai *codec_dai,
		unsigned int fmt)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u8 mode1 = 0;

	/* interface format */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		mode1 = 0x0002;
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		mode1 = 0x0001;
		break;
	default:
		return -EINVAL;
	}

	/* use 32 fs for BCLK to save power */
	mode1 |= 0x4;

	ak4535_write(codec, AK4535_MODE1, mode1);
	return 0;
}

static int ak4535_mute(struct snd_soc_dai *dai, int mute)
{
	struct snd_soc_codec *codec = dai->codec;
	u16 mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC) & 0xffdf;
	if (!mute)
		ak4535_write(codec, AK4535_DAC, mute_reg);
	else
		ak4535_write(codec, AK4535_DAC, mute_reg | 0x20);
	return 0;
}

static int ak4535_set_bias_level(struct snd_soc_codec *codec,
	enum snd_soc_bias_level level)
{
	u16 i;

	switch (level) {
	case SND_SOC_BIAS_ON:
		ak4535_mute(codec->dai, 0);
		break;
	case SND_SOC_BIAS_PREPARE:
		ak4535_mute(codec->dai, 1);
		break;
	case SND_SOC_BIAS_STANDBY:
		i = ak4535_read_reg_cache(codec, AK4535_PM1);
		ak4535_write(codec, AK4535_PM1, i | 0x80);
		i = ak4535_read_reg_cache(codec, AK4535_PM2);
		ak4535_write(codec, AK4535_PM2, i & (~0x80));
		break;
	case SND_SOC_BIAS_OFF:
		i = ak4535_read_reg_cache(codec, AK4535_PM1);
		ak4535_write(codec, AK4535_PM1, i & (~0x80));
		break;
	}
	codec->bias_level = level;
	return 0;
}

#define AK4535_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
		SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
		SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)

struct snd_soc_dai ak4535_dai = {
	.name = "AK4535",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 1,
		.channels_max = 2,
		.rates = AK4535_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 1,
		.channels_max = 2,
		.rates = AK4535_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	.ops = {
		.hw_params = ak4535_hw_params,
		.set_fmt = ak4535_set_dai_fmt,
		.digital_mute = ak4535_mute,
		.set_sysclk = ak4535_set_dai_sysclk,
	},
};
EXPORT_SYMBOL_GPL(ak4535_dai);

static int ak4535_suspend(struct platform_device *pdev, pm_message_t state)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->card->codec;

	ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
	return 0;
}

static int ak4535_resume(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->card->codec;
	ak4535_sync(codec);
	ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	ak4535_set_bias_level(codec, codec->suspend_bias_level);
	return 0;
}

/*
 * initialise the AK4535 driver
 * register the mixer and dsp interfaces with the kernel
 */
static int ak4535_init(struct snd_soc_device *socdev)
{
	struct snd_soc_codec *codec = socdev->card->codec;
	int ret = 0;

	codec->name = "AK4535";
	codec->owner = THIS_MODULE;
	codec->read = ak4535_read_reg_cache;
	codec->write = ak4535_write;
	codec->set_bias_level = ak4535_set_bias_level;
	codec->dai = &ak4535_dai;
	codec->num_dai = 1;
	codec->reg_cache_size = ARRAY_SIZE(ak4535_reg);
	codec->reg_cache = kmemdup(ak4535_reg, sizeof(ak4535_reg), GFP_KERNEL);

	if (codec->reg_cache == NULL)
		return -ENOMEM;

	/* register pcms */
	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	if (ret < 0) {
		printk(KERN_ERR "ak4535: failed to create pcms\n");
		goto pcm_err;
	}

	/* power on device */
	ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	snd_soc_add_controls(codec, ak4535_snd_controls,
				ARRAY_SIZE(ak4535_snd_controls));
	ak4535_add_widgets(codec);
	ret = snd_soc_init_card(socdev);
	if (ret < 0) {
		printk(KERN_ERR "ak4535: failed to register card\n");
		goto card_err;
	}

	return ret;

card_err:
	snd_soc_free_pcms(socdev);
	snd_soc_dapm_free(socdev);
pcm_err:
	kfree(codec->reg_cache);

	return ret;
}

static struct snd_soc_device *ak4535_socdev;

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)

static int ak4535_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct snd_soc_device *socdev = ak4535_socdev;
	struct snd_soc_codec *codec = socdev->card->codec;
	int ret;

	i2c_set_clientdata(i2c, codec);
	codec->control_data = i2c;

	ret = ak4535_init(socdev);
	if (ret < 0)
		printk(KERN_ERR "failed to initialise AK4535\n");

	return ret;
}

static int ak4535_i2c_remove(struct i2c_client *client)
{
	struct snd_soc_codec *codec = i2c_get_clientdata(client);
	kfree(codec->reg_cache);
	return 0;
}

static const struct i2c_device_id ak4535_i2c_id[] = {
	{ "ak4535", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id);

static struct i2c_driver ak4535_i2c_driver = {
	.driver = {
		.name = "AK4535 I2C Codec",
		.owner = THIS_MODULE,
	},
	.probe =    ak4535_i2c_probe,
	.remove =   ak4535_i2c_remove,
	.id_table = ak4535_i2c_id,
};

static int ak4535_add_i2c_device(struct platform_device *pdev,
				 const struct ak4535_setup_data *setup)
{
	struct i2c_board_info info;
	struct i2c_adapter *adapter;
	struct i2c_client *client;
	int ret;

	ret = i2c_add_driver(&ak4535_i2c_driver);
	if (ret != 0) {
		dev_err(&pdev->dev, "can't add i2c driver\n");
		return ret;
	}

	memset(&info, 0, sizeof(struct i2c_board_info));
	info.addr = setup->i2c_address;
	strlcpy(info.type, "ak4535", I2C_NAME_SIZE);

	adapter = i2c_get_adapter(setup->i2c_bus);
	if (!adapter) {
		dev_err(&pdev->dev, "can't get i2c adapter %d\n",
			setup->i2c_bus);
		goto err_driver;
	}

	client = i2c_new_device(adapter, &info);
	i2c_put_adapter(adapter);
	if (!client) {
		dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
			(unsigned int)info.addr);
		goto err_driver;
	}

	return 0;

err_driver:
	i2c_del_driver(&ak4535_i2c_driver);
	return -ENODEV;
}
#endif

static int ak4535_probe(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct ak4535_setup_data *setup;
	struct snd_soc_codec *codec;
	struct ak4535_priv *ak4535;
	int ret;

	printk(KERN_INFO "AK4535 Audio Codec %s", AK4535_VERSION);

	setup = socdev->codec_data;
	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
	if (codec == NULL)
		return -ENOMEM;

	ak4535 = kzalloc(sizeof(struct ak4535_priv), GFP_KERNEL);
	if (ak4535 == NULL) {
		kfree(codec);
		return -ENOMEM;
	}

	codec->private_data = ak4535;
	socdev->card->codec = codec;
	mutex_init(&codec->mutex);
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	ak4535_socdev = socdev;
	ret = -ENODEV;

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	if (setup->i2c_address) {
		codec->hw_write = (hw_write_t)i2c_master_send;
		codec->hw_read = (hw_read_t)i2c_master_recv;
		ret = ak4535_add_i2c_device(pdev, setup);
	}
#endif

	if (ret != 0) {
		kfree(codec->private_data);
		kfree(codec);
	}
	return ret;
}

/* power down chip */
static int ak4535_remove(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->card->codec;

	if (codec->control_data)
		ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);

	snd_soc_free_pcms(socdev);
	snd_soc_dapm_free(socdev);
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	i2c_unregister_device(codec->control_data);
	i2c_del_driver(&ak4535_i2c_driver);
#endif
	kfree(codec->private_data);
	kfree(codec);

	return 0;
}

struct snd_soc_codec_device soc_codec_dev_ak4535 = {
	.probe = 	ak4535_probe,
	.remove = 	ak4535_remove,
	.suspend = 	ak4535_suspend,
	.resume =	ak4535_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_ak4535);

static int __init ak4535_modinit(void)
{
	return snd_soc_register_dai(&ak4535_dai);
}
module_init(ak4535_modinit);

static void __exit ak4535_exit(void)
{
	snd_soc_unregister_dai(&ak4535_dai);
}
module_exit(ak4535_exit);

MODULE_DESCRIPTION("Soc AK4535 driver");
MODULE_AUTHOR("Richard Purdie");
MODULE_LICENSE("GPL");
Commit	Line	Data
796d2ca8 RP	1	/*
	2	* ak4535.c -- AK4535 ALSA Soc Audio driver
	3	*
	4	* Copyright 2005 Openedhand Ltd.
	5	*
	6	* Author: Richard Purdie <richard@openedhand.com>
	7	*
	8	* Based on wm8753.c by Liam Girdwood
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*/
	14
	15	#include <linux/module.h>
	16	#include <linux/moduleparam.h>
	17	#include <linux/init.h>
	18	#include <linux/delay.h>
	19	#include <linux/pm.h>
	20	#include <linux/i2c.h>
	21	#include <linux/platform_device.h>
	22	#include <sound/core.h>
	23	#include <sound/pcm.h>
	24	#include <sound/pcm_params.h>
	25	#include <sound/soc.h>
	26	#include <sound/soc-dapm.h>
	27	#include <sound/initval.h>
	28
	29	#include "ak4535.h"
	30
796d2ca8 RP	31	#define AK4535_VERSION "0.3"
	32
	33	struct snd_soc_codec_device soc_codec_dev_ak4535;
	34
	35	/* codec private data */
	36	struct ak4535_priv {
	37	unsigned int sysclk;
	38	};
	39
	40	/*
	41	* ak4535 register cache
	42	*/
	43	static const u16 ak4535_reg[AK4535_CACHEREGNUM] = {
	44	0x0000, 0x0080, 0x0000, 0x0003,
	45	0x0002, 0x0000, 0x0011, 0x0001,
	46	0x0000, 0x0040, 0x0036, 0x0010,
	47	0x0000, 0x0000, 0x0057, 0x0000,
	48	};
	49
	50	/*
	51	* read ak4535 register cache
	52	*/
	53	static inline unsigned int ak4535_read_reg_cache(struct snd_soc_codec *codec,
	54	unsigned int reg)
	55	{
	56	u16 *cache = codec->reg_cache;
	57	if (reg >= AK4535_CACHEREGNUM)
	58	return -1;
	59	return cache[reg];
	60	}
	61
	62	static inline unsigned int ak4535_read(struct snd_soc_codec *codec,
	63	unsigned int reg)
	64	{
	65	u8 data;
	66	data = reg;
	67
	68	if (codec->hw_write(codec->control_data, &data, 1) != 1)
	69	return -EIO;
	70
	71	if (codec->hw_read(codec->control_data, &data, 1) != 1)
	72	return -EIO;
	73
	74	return data;
	75	};
	76
	77	/*
	78	* write ak4535 register cache
	79	*/
	80	static inline void ak4535_write_reg_cache(struct snd_soc_codec *codec,
	81	u16 reg, unsigned int value)
	82	{
	83	u16 *cache = codec->reg_cache;
	84	if (reg >= AK4535_CACHEREGNUM)
	85	return;
	86	cache[reg] = value;
	87	}
	88
	89	/*
	90	* write to the AK4535 register space
	91	*/
	92	static int ak4535_write(struct snd_soc_codec *codec, unsigned int reg,
	93	unsigned int value)
	94	{
95	u8 data[2];
96
97	/* data is
98	* D15..D8 AK4535 register offset
99	* D7...D0 register data
100	*/
101	data[0] = reg & 0xff;
102	data[1] = value & 0xff;
103
104	ak4535_write_reg_cache(codec, reg, value);
105	if (codec->hw_write(codec->control_data, data, 2) == 2)
106	return 0;
107	else
108	return -EIO;
109	}
110
111	static int ak4535_sync(struct snd_soc_codec *codec)
112	{
113	u16 *cache = codec->reg_cache;
114	int i, r = 0;
115
116	for (i = 0; i < AK4535_CACHEREGNUM; i++)
117	r \|= ak4535_write(codec, i, cache[i]);
118
119	return r;
120	};
121
122	static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"};
123	static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"};
124	static const char *ak4535_hp_out[] = {"Stereo", "Mono"};
125	static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"};
126	static const char *ak4535_mic_select[] = {"Internal", "External"};
127
128	static const struct soc_enum ak4535_enum[] = {
129	SOC_ENUM_SINGLE(AK4535_SIG1, 7, 2, ak4535_mono_gain),
130	SOC_ENUM_SINGLE(AK4535_SIG1, 6, 2, ak4535_mono_out),
131	SOC_ENUM_SINGLE(AK4535_MODE2, 2, 2, ak4535_hp_out),
132	SOC_ENUM_SINGLE(AK4535_DAC, 0, 4, ak4535_deemp),
133	SOC_ENUM_SINGLE(AK4535_MIC, 1, 2, ak4535_mic_select),
134	};
135
136	static const struct snd_kcontrol_new ak4535_snd_controls[] = {
137	SOC_SINGLE("ALC2 Switch", AK4535_SIG1, 1, 1, 0),
138	SOC_ENUM("Mono 1 Output", ak4535_enum[1]),
139	SOC_ENUM("Mono 1 Gain", ak4535_enum[0]),
140	SOC_ENUM("Headphone Output", ak4535_enum[2]),
141	SOC_ENUM("Playback Deemphasis", ak4535_enum[3]),
142	SOC_SINGLE("Bass Volume", AK4535_DAC, 2, 3, 0),
143	SOC_SINGLE("Mic Boost (+20dB) Switch", AK4535_MIC, 0, 1, 0),
144	SOC_ENUM("Mic Select", ak4535_enum[4]),
145	SOC_SINGLE("ALC Operation Time", AK4535_TIMER, 0, 3, 0),
146	SOC_SINGLE("ALC Recovery Time", AK4535_TIMER, 2, 3, 0),
147	SOC_SINGLE("ALC ZC Time", AK4535_TIMER, 4, 3, 0),
148	SOC_SINGLE("ALC 1 Switch", AK4535_ALC1, 5, 1, 0),
149	SOC_SINGLE("ALC 2 Switch", AK4535_ALC1, 6, 1, 0),
150	SOC_SINGLE("ALC Volume", AK4535_ALC2, 0, 127, 0),
151	SOC_SINGLE("Capture Volume", AK4535_PGA, 0, 127, 0),
152	SOC_SINGLE("Left Playback Volume", AK4535_LATT, 0, 127, 1),
153	SOC_SINGLE("Right Playback Volume", AK4535_RATT, 0, 127, 1),
154	SOC_SINGLE("AUX Bypass Volume", AK4535_VOL, 0, 15, 0),
155	SOC_SINGLE("Mic Sidetone Volume", AK4535_VOL, 4, 7, 0),
156	};
157
796d2ca8 RP	158	/* Mono 1 Mixer */
	159	static const struct snd_kcontrol_new ak4535_mono1_mixer_controls[] = {
	160	SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG1, 4, 1, 0),
	161	SOC_DAPM_SINGLE("Mono Playback Switch", AK4535_SIG1, 5, 1, 0),
	162	};
	163
	164	/* Stereo Mixer */
	165	static const struct snd_kcontrol_new ak4535_stereo_mixer_controls[] = {
	166	SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG2, 4, 1, 0),
	167	SOC_DAPM_SINGLE("Playback Switch", AK4535_SIG2, 7, 1, 0),
	168	SOC_DAPM_SINGLE("Aux Bypass Switch", AK4535_SIG2, 5, 1, 0),
	169	};
	170
	171	/* Input Mixer */
	172	static const struct snd_kcontrol_new ak4535_input_mixer_controls[] = {
	173	SOC_DAPM_SINGLE("Mic Capture Switch", AK4535_MIC, 2, 1, 0),
	174	SOC_DAPM_SINGLE("Aux Capture Switch", AK4535_MIC, 5, 1, 0),
	175	};
	176
	177	/* Input mux */
	178	static const struct snd_kcontrol_new ak4535_input_mux_control =
	179	SOC_DAPM_ENUM("Input Select", ak4535_enum[4]);
	180
	181	/* HP L switch */
	182	static const struct snd_kcontrol_new ak4535_hpl_control =
	183	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1);
	184
	185	/* HP R switch */
	186	static const struct snd_kcontrol_new ak4535_hpr_control =
	187	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1);
	188
	189	/* mono 2 switch */
	190	static const struct snd_kcontrol_new ak4535_mono2_control =
	191	SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0);
	192
	193	/* Line out switch */
	194	static const struct snd_kcontrol_new ak4535_line_control =
	195	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0);
	196
	197	/* ak4535 dapm widgets */
	198	static const struct snd_soc_dapm_widget ak4535_dapm_widgets[] = {
	199	SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
	200	&ak4535_stereo_mixer_controls[0],
	201	ARRAY_SIZE(ak4535_stereo_mixer_controls)),
	202	SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
	203	&ak4535_mono1_mixer_controls[0],
	204	ARRAY_SIZE(ak4535_mono1_mixer_controls)),
	205	SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
	206	&ak4535_input_mixer_controls[0],
	207	ARRAY_SIZE(ak4535_input_mixer_controls)),
	208	SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
	209	&ak4535_input_mux_control),
	210	SND_SOC_DAPM_DAC("DAC", "Playback", AK4535_PM2, 0, 0),
	211	SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
	212	&ak4535_mono2_control),
	213	/* speaker powersave bit */
	214	SND_SOC_DAPM_PGA("Speaker Enable", AK4535_MODE2, 0, 0, NULL, 0),
	215	SND_SOC_DAPM_SWITCH("Line Out Enable", SND_SOC_NOPM, 0, 0,
	216	&ak4535_line_control),
	217	SND_SOC_DAPM_SWITCH("Left HP Enable", SND_SOC_NOPM, 0, 0,
	218	&ak4535_hpl_control),
	219	SND_SOC_DAPM_SWITCH("Right HP Enable", SND_SOC_NOPM, 0, 0,
	220	&ak4535_hpr_control),
	221	SND_SOC_DAPM_OUTPUT("LOUT"),
222	SND_SOC_DAPM_OUTPUT("HPL"),
223	SND_SOC_DAPM_OUTPUT("ROUT"),
224	SND_SOC_DAPM_OUTPUT("HPR"),
225	SND_SOC_DAPM_OUTPUT("SPP"),
226	SND_SOC_DAPM_OUTPUT("SPN"),
227	SND_SOC_DAPM_OUTPUT("MOUT1"),
228	SND_SOC_DAPM_OUTPUT("MOUT2"),
229	SND_SOC_DAPM_OUTPUT("MICOUT"),
230	SND_SOC_DAPM_ADC("ADC", "Capture", AK4535_PM1, 0, 0),
231	SND_SOC_DAPM_PGA("Spk Amp", AK4535_PM2, 3, 0, NULL, 0),
232	SND_SOC_DAPM_PGA("HP R Amp", AK4535_PM2, 1, 0, NULL, 0),
233	SND_SOC_DAPM_PGA("HP L Amp", AK4535_PM2, 2, 0, NULL, 0),
234	SND_SOC_DAPM_PGA("Mic", AK4535_PM1, 1, 0, NULL, 0),
235	SND_SOC_DAPM_PGA("Line Out", AK4535_PM1, 4, 0, NULL, 0),
236	SND_SOC_DAPM_PGA("Mono Out", AK4535_PM1, 3, 0, NULL, 0),
237	SND_SOC_DAPM_PGA("AUX In", AK4535_PM1, 2, 0, NULL, 0),
238
239	SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4535_MIC, 3, 0),
240	SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4535_MIC, 4, 0),
241	SND_SOC_DAPM_INPUT("MICIN"),
242	SND_SOC_DAPM_INPUT("MICEXT"),
243	SND_SOC_DAPM_INPUT("AUX"),
244	SND_SOC_DAPM_INPUT("MIN"),
245	SND_SOC_DAPM_INPUT("AIN"),
246	};
247
248	static const struct snd_soc_dapm_route audio_map[] = {
249	/stereo mixer /
250	{"Stereo Mixer", "Playback Switch", "DAC"},
251	{"Stereo Mixer", "Mic Sidetone Switch", "Mic"},
252	{"Stereo Mixer", "Aux Bypass Switch", "AUX In"},
253
254	/* mono1 mixer */
255	{"Mono1 Mixer", "Mic Sidetone Switch", "Mic"},
256	{"Mono1 Mixer", "Mono Playback Switch", "DAC"},
257
258	/* Mic */
259	{"Mic", NULL, "AIN"},
260	{"Input Mux", "Internal", "Mic Int Bias"},
261	{"Input Mux", "External", "Mic Ext Bias"},
262	{"Mic Int Bias", NULL, "MICIN"},
263	{"Mic Ext Bias", NULL, "MICEXT"},
264	{"MICOUT", NULL, "Input Mux"},
265
266	/* line out */
267	{"LOUT", NULL, "Line Out Enable"},
268	{"ROUT", NULL, "Line Out Enable"},
269	{"Line Out Enable", "Switch", "Line Out"},
270	{"Line Out", NULL, "Stereo Mixer"},
271
272	/* mono1 out */
273	{"MOUT1", NULL, "Mono Out"},
274	{"Mono Out", NULL, "Mono1 Mixer"},
275
276	/* left HP */
277	{"HPL", NULL, "Left HP Enable"},
278	{"Left HP Enable", "Switch", "HP L Amp"},
279	{"HP L Amp", NULL, "Stereo Mixer"},
280
281	/* right HP */
282	{"HPR", NULL, "Right HP Enable"},
283	{"Right HP Enable", "Switch", "HP R Amp"},
284	{"HP R Amp", NULL, "Stereo Mixer"},
285
286	/* speaker */
287	{"SPP", NULL, "Speaker Enable"},
288	{"SPN", NULL, "Speaker Enable"},
289	{"Speaker Enable", "Switch", "Spk Amp"},
290	{"Spk Amp", NULL, "MIN"},
291
292	/* mono 2 */
293	{"MOUT2", NULL, "Mono 2 Enable"},
294	{"Mono 2 Enable", "Switch", "Stereo Mixer"},
295
296	/* Aux In */
297	{"Aux In", NULL, "AUX"},
298
299	/* ADC */
300	{"ADC", NULL, "Input Mixer"},
301	{"Input Mixer", "Mic Capture Switch", "Mic"},
302	{"Input Mixer", "Aux Capture Switch", "Aux In"},
303	};
304
305	static int ak4535_add_widgets(struct snd_soc_codec *codec)
306	{
307	snd_soc_dapm_new_controls(codec, ak4535_dapm_widgets,
308	ARRAY_SIZE(ak4535_dapm_widgets));
309
310	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
311
312	snd_soc_dapm_new_widgets(codec);
313	return 0;
314	}
315
e550e17f	316	static int ak4535_set_dai_sysclk(struct snd_soc_dai *codec_dai,
796d2ca8 RP	317	int clk_id, unsigned int freq, int dir)
	318	{
	319	struct snd_soc_codec *codec = codec_dai->codec;
	320	struct ak4535_priv *ak4535 = codec->private_data;
	321
	322	ak4535->sysclk = freq;
	323	return 0;
	324	}
	325
	326	static int ak4535_hw_params(struct snd_pcm_substream *substream,
dee89c4d MB	327	struct snd_pcm_hw_params *params,
dee89c4d MB	328	struct snd_soc_dai *dai)
796d2ca8 RP	329	{
	330	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	331	struct snd_soc_device *socdev = rtd->socdev;
6627a653	332	struct snd_soc_codec *codec = socdev->card->codec;
796d2ca8 RP	333	struct ak4535_priv *ak4535 = codec->private_data;
	334	u8 mode2 = ak4535_read_reg_cache(codec, AK4535_MODE2) & ~(0x3 << 5);
	335	int rate = params_rate(params), fs = 256;
	336
	337	if (rate)
	338	fs = ak4535->sysclk / rate;
	339
	340	/* set fs */
	341	switch (fs) {
	342	case 1024:
	343	mode2 \|= (0x2 << 5);
	344	break;
	345	case 512:
	346	mode2 \|= (0x1 << 5);
	347	break;
	348	case 256:
	349	break;
	350	}
	351
	352	/* set rate */
	353	ak4535_write(codec, AK4535_MODE2, mode2);
	354	return 0;
	355	}
	356
e550e17f	357	static int ak4535_set_dai_fmt(struct snd_soc_dai *codec_dai,
796d2ca8 RP	358	unsigned int fmt)
	359	{
	360	struct snd_soc_codec *codec = codec_dai->codec;
	361	u8 mode1 = 0;
	362
	363	/* interface format */
	364	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	365	case SND_SOC_DAIFMT_I2S:
	366	mode1 = 0x0002;
	367	break;
	368	case SND_SOC_DAIFMT_LEFT_J:
	369	mode1 = 0x0001;
	370	break;
	371	default:
	372	return -EINVAL;
	373	}
	374
	375	/* use 32 fs for BCLK to save power */
	376	mode1 \|= 0x4;
	377
	378	ak4535_write(codec, AK4535_MODE1, mode1);
	379	return 0;
	380	}
	381
e550e17f	382	static int ak4535_mute(struct snd_soc_dai *dai, int mute)
796d2ca8 RP	383	{
	384	struct snd_soc_codec *codec = dai->codec;
	385	u16 mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC) & 0xffdf;
	386	if (!mute)
	387	ak4535_write(codec, AK4535_DAC, mute_reg);
	388	else
	389	ak4535_write(codec, AK4535_DAC, mute_reg \| 0x20);
	390	return 0;
	391	}
	392
	393	static int ak4535_set_bias_level(struct snd_soc_codec *codec,
	394	enum snd_soc_bias_level level)
	395	{
	396	u16 i;
	397
	398	switch (level) {
	399	case SND_SOC_BIAS_ON:
	400	ak4535_mute(codec->dai, 0);
	401	break;
	402	case SND_SOC_BIAS_PREPARE:
	403	ak4535_mute(codec->dai, 1);
	404	break;
	405	case SND_SOC_BIAS_STANDBY:
	406	i = ak4535_read_reg_cache(codec, AK4535_PM1);
	407	ak4535_write(codec, AK4535_PM1, i \| 0x80);
	408	i = ak4535_read_reg_cache(codec, AK4535_PM2);
	409	ak4535_write(codec, AK4535_PM2, i & (~0x80));
	410	break;
	411	case SND_SOC_BIAS_OFF:
	412	i = ak4535_read_reg_cache(codec, AK4535_PM1);
	413	ak4535_write(codec, AK4535_PM1, i & (~0x80));
	414	break;
	415	}
	416	codec->bias_level = level;
	417	return 0;
	418	}
	419
	420	#define AK4535_RATES (SNDRV_PCM_RATE_8000 \| SNDRV_PCM_RATE_11025 \|\
	421	SNDRV_PCM_RATE_16000 \| SNDRV_PCM_RATE_22050 \|\
	422	SNDRV_PCM_RATE_44100 \| SNDRV_PCM_RATE_48000)
	423
e550e17f	424	struct snd_soc_dai ak4535_dai = {
796d2ca8 RP	425	.name = "AK4535",
	426	.playback = {
	427	.stream_name = "Playback",
	428	.channels_min = 1,
	429	.channels_max = 2,
	430	.rates = AK4535_RATES,
	431	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	432	.capture = {
	433	.stream_name = "Capture",
	434	.channels_min = 1,
	435	.channels_max = 2,
	436	.rates = AK4535_RATES,
	437	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	438	.ops = {
	439	.hw_params = ak4535_hw_params,
796d2ca8 RP	440	.set_fmt = ak4535_set_dai_fmt,
	441	.digital_mute = ak4535_mute,
	442	.set_sysclk = ak4535_set_dai_sysclk,
	443	},
	444	};
	445	EXPORT_SYMBOL_GPL(ak4535_dai);
	446
	447	static int ak4535_suspend(struct platform_device *pdev, pm_message_t state)
	448	{
	449	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
6627a653	450	struct snd_soc_codec *codec = socdev->card->codec;
796d2ca8 RP	451
	452	ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
	453	return 0;
	454	}
	455
	456	static int ak4535_resume(struct platform_device *pdev)
	457	{
	458	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
6627a653	459	struct snd_soc_codec *codec = socdev->card->codec;
796d2ca8 RP	460	ak4535_sync(codec);
	461	ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	462	ak4535_set_bias_level(codec, codec->suspend_bias_level);
	463	return 0;
	464	}
	465
	466	/*
	467	* initialise the AK4535 driver
	468	* register the mixer and dsp interfaces with the kernel
	469	*/
	470	static int ak4535_init(struct snd_soc_device *socdev)
	471	{
6627a653	472	struct snd_soc_codec *codec = socdev->card->codec;
796d2ca8 RP	473	int ret = 0;
	474
	475	codec->name = "AK4535";
	476	codec->owner = THIS_MODULE;
	477	codec->read = ak4535_read_reg_cache;
	478	codec->write = ak4535_write;
	479	codec->set_bias_level = ak4535_set_bias_level;
	480	codec->dai = &ak4535_dai;
	481	codec->num_dai = 1;
	482	codec->reg_cache_size = ARRAY_SIZE(ak4535_reg);
	483	codec->reg_cache = kmemdup(ak4535_reg, sizeof(ak4535_reg), GFP_KERNEL);
	484
	485	if (codec->reg_cache == NULL)
	486	return -ENOMEM;
	487
	488	/* register pcms */
	489	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	490	if (ret < 0) {
	491	printk(KERN_ERR "ak4535: failed to create pcms\n");
	492	goto pcm_err;
	493	}
	494
	495	/* power on device */
	496	ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	497
3e8e1952 IM	498	snd_soc_add_controls(codec, ak4535_snd_controls,
3e8e1952 IM	499	ARRAY_SIZE(ak4535_snd_controls));
796d2ca8	500	ak4535_add_widgets(codec);
968a6025	501	ret = snd_soc_init_card(socdev);
796d2ca8 RP	502	if (ret < 0) {
	503	printk(KERN_ERR "ak4535: failed to register card\n");
	504	goto card_err;
	505	}
	506
	507	return ret;
	508
	509	card_err:
	510	snd_soc_free_pcms(socdev);
	511	snd_soc_dapm_free(socdev);
	512	pcm_err:
	513	kfree(codec->reg_cache);
	514
	515	return ret;
	516	}
	517
	518	static struct snd_soc_device *ak4535_socdev;
	519
	520	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	521
d28d2713 JD	522	static int ak4535_i2c_probe(struct i2c_client *i2c,
d28d2713 JD	523	const struct i2c_device_id *id)
796d2ca8 RP	524	{
796d2ca8 RP	525	struct snd_soc_device *socdev = ak4535_socdev;
6627a653	526	struct snd_soc_codec *codec = socdev->card->codec;
796d2ca8 RP	527	int ret;
796d2ca8 RP	528
796d2ca8 RP	529	i2c_set_clientdata(i2c, codec);
	530	codec->control_data = i2c;
	531
796d2ca8	532	ret = ak4535_init(socdev);
d28d2713	533	if (ret < 0)
796d2ca8	534	printk(KERN_ERR "failed to initialise AK4535\n");
796d2ca8	535
796d2ca8 RP	536	return ret;
	537	}
	538
d28d2713	539	static int ak4535_i2c_remove(struct i2c_client *client)
796d2ca8 RP	540	{
796d2ca8 RP	541	struct snd_soc_codec *codec = i2c_get_clientdata(client);
796d2ca8	542	kfree(codec->reg_cache);
796d2ca8 RP	543	return 0;
	544	}
	545
d28d2713 JD	546	static const struct i2c_device_id ak4535_i2c_id[] = {
	547	{ "ak4535", 0 },
	548	{ }
	549	};
	550	MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id);
796d2ca8	551
796d2ca8 RP	552	static struct i2c_driver ak4535_i2c_driver = {
	553	.driver = {
	554	.name = "AK4535 I2C Codec",
	555	.owner = THIS_MODULE,
	556	},
d28d2713 JD	557	.probe = ak4535_i2c_probe,
	558	.remove = ak4535_i2c_remove,
	559	.id_table = ak4535_i2c_id,
796d2ca8 RP	560	};
796d2ca8 RP	561
d28d2713 JD	562	static int ak4535_add_i2c_device(struct platform_device *pdev,
	563	const struct ak4535_setup_data *setup)
	564	{
	565	struct i2c_board_info info;
	566	struct i2c_adapter *adapter;
	567	struct i2c_client *client;
	568	int ret;
	569
	570	ret = i2c_add_driver(&ak4535_i2c_driver);
	571	if (ret != 0) {
	572	dev_err(&pdev->dev, "can't add i2c driver\n");
	573	return ret;
	574	}
	575
	576	memset(&info, 0, sizeof(struct i2c_board_info));
	577	info.addr = setup->i2c_address;
	578	strlcpy(info.type, "ak4535", I2C_NAME_SIZE);
	579
	580	adapter = i2c_get_adapter(setup->i2c_bus);
	581	if (!adapter) {
	582	dev_err(&pdev->dev, "can't get i2c adapter %d\n",
	583	setup->i2c_bus);
	584	goto err_driver;
	585	}
	586
	587	client = i2c_new_device(adapter, &info);
	588	i2c_put_adapter(adapter);
	589	if (!client) {
	590	dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
	591	(unsigned int)info.addr);
	592	goto err_driver;
	593	}
	594
	595	return 0;
	596
	597	err_driver:
	598	i2c_del_driver(&ak4535_i2c_driver);
	599	return -ENODEV;
	600	}
796d2ca8 RP	601	#endif
	602
	603	static int ak4535_probe(struct platform_device *pdev)
	604	{
	605	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	606	struct ak4535_setup_data *setup;
	607	struct snd_soc_codec *codec;
	608	struct ak4535_priv *ak4535;
b7c9d852	609	int ret;
796d2ca8 RP	610
	611	printk(KERN_INFO "AK4535 Audio Codec %s", AK4535_VERSION);
	612
	613	setup = socdev->codec_data;
	614	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
	615	if (codec == NULL)
	616	return -ENOMEM;
	617
	618	ak4535 = kzalloc(sizeof(struct ak4535_priv), GFP_KERNEL);
	619	if (ak4535 == NULL) {
	620	kfree(codec);
	621	return -ENOMEM;
	622	}
	623
	624	codec->private_data = ak4535;
6627a653	625	socdev->card->codec = codec;
796d2ca8 RP	626	mutex_init(&codec->mutex);
	627	INIT_LIST_HEAD(&codec->dapm_widgets);
	628	INIT_LIST_HEAD(&codec->dapm_paths);
	629
	630	ak4535_socdev = socdev;
b7c9d852 MB	631	ret = -ENODEV;
b7c9d852 MB	632
796d2ca8 RP	633	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
796d2ca8 RP	634	if (setup->i2c_address) {
796d2ca8 RP	635	codec->hw_write = (hw_write_t)i2c_master_send;
796d2ca8 RP	636	codec->hw_read = (hw_read_t)i2c_master_recv;
d28d2713	637	ret = ak4535_add_i2c_device(pdev, setup);
796d2ca8	638	}
796d2ca8	639	#endif
3051e41a JD	640
	641	if (ret != 0) {
	642	kfree(codec->private_data);
	643	kfree(codec);
	644	}
796d2ca8 RP	645	return ret;
	646	}
	647
	648	/* power down chip */
	649	static int ak4535_remove(struct platform_device *pdev)
	650	{
	651	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
6627a653	652	struct snd_soc_codec *codec = socdev->card->codec;
796d2ca8 RP	653
	654	if (codec->control_data)
	655	ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
	656
	657	snd_soc_free_pcms(socdev);
	658	snd_soc_dapm_free(socdev);
	659	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
d28d2713	660	i2c_unregister_device(codec->control_data);
796d2ca8 RP	661	i2c_del_driver(&ak4535_i2c_driver);
	662	#endif
	663	kfree(codec->private_data);
	664	kfree(codec);
	665
	666	return 0;
	667	}
	668
	669	struct snd_soc_codec_device soc_codec_dev_ak4535 = {
	670	.probe = ak4535_probe,
	671	.remove = ak4535_remove,
	672	.suspend = ak4535_suspend,
	673	.resume = ak4535_resume,
	674	};
	675	EXPORT_SYMBOL_GPL(soc_codec_dev_ak4535);
	676
c9b3a40f	677	static int __init ak4535_modinit(void)
64089b84 MB	678	{
	679	return snd_soc_register_dai(&ak4535_dai);
	680	}
	681	module_init(ak4535_modinit);
	682
	683	static void __exit ak4535_exit(void)
	684	{
	685	snd_soc_unregister_dai(&ak4535_dai);
	686	}
	687	module_exit(ak4535_exit);
	688
796d2ca8 RP	689	MODULE_DESCRIPTION("Soc AK4535 driver");
	690	MODULE_AUTHOR("Richard Purdie");
	691	MODULE_LICENSE("GPL");