[net-next-2.6.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 <linux/slab.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"

/* codec private data */
struct ak4535_priv {
	unsigned int sysclk;
	enum snd_soc_control_type control_type;
	void *control_data;
};

/*
 * 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];
}

/*
 * 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));

	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 = snd_soc_codec_get_drvdata(codec);

	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_codec *codec = rtd->codec;
	struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
	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, mute_reg;

	switch (level) {
	case SND_SOC_BIAS_ON:
		mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC) & 0xffdf;
		ak4535_write(codec, AK4535_DAC, mute_reg);
		break;
	case SND_SOC_BIAS_PREPARE:
		mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC) & 0xffdf;
		ak4535_write(codec, AK4535_DAC, mute_reg | 0x20);
		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)

static struct snd_soc_dai_ops ak4535_dai_ops = {
	.hw_params	= ak4535_hw_params,
	.set_fmt	= ak4535_set_dai_fmt,
	.digital_mute	= ak4535_mute,
	.set_sysclk	= ak4535_set_dai_sysclk,
};

static struct snd_soc_dai_driver ak4535_dai = {
	.name = "ak4535-hifi",
	.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 = &ak4535_dai_ops,
};

static int ak4535_suspend(struct snd_soc_codec *codec, pm_message_t state)
{
	ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
	return 0;
}

static int ak4535_resume(struct snd_soc_codec *codec)
{
	ak4535_sync(codec);
	ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	return 0;
}

static int ak4535_probe(struct snd_soc_codec *codec)
{
	struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);

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

	codec->control_data = ak4535->control_data;

	/* 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);

	return 0;
}

/* power down chip */
static int ak4535_remove(struct snd_soc_codec *codec)
{
	ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
	return 0;
}

static struct snd_soc_codec_driver soc_codec_dev_ak4535 = {
	.probe =	ak4535_probe,
	.remove =	ak4535_remove,
	.suspend =	ak4535_suspend,
	.resume =	ak4535_resume,
	.read = ak4535_read_reg_cache,
	.write = ak4535_write,
	.set_bias_level = ak4535_set_bias_level,
	.reg_cache_size = ARRAY_SIZE(ak4535_reg),
	.reg_word_size = sizeof(u8),
	.reg_cache_default = ak4535_reg,
};

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static __devinit int ak4535_i2c_probe(struct i2c_client *i2c,
				      const struct i2c_device_id *id)
{
	struct ak4535_priv *ak4535;
	int ret;

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

	i2c_set_clientdata(i2c, ak4535);
	ak4535->control_data = i2c;
	ak4535->control_type = SND_SOC_I2C;

	ret = snd_soc_register_codec(&i2c->dev,
			&soc_codec_dev_ak4535, &ak4535_dai, 1);
	if (ret < 0)
		kfree(ak4535);
	return ret;
}

static __devexit int ak4535_i2c_remove(struct i2c_client *client)
{
	snd_soc_unregister_codec(&client->dev);
	kfree(i2c_get_clientdata(client));
	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-codec",
		.owner = THIS_MODULE,
	},
	.probe =    ak4535_i2c_probe,
	.remove =   __devexit_p(ak4535_i2c_remove),
	.id_table = ak4535_i2c_id,
};
#endif

static int __init ak4535_modinit(void)
{
	int ret = 0;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	ret = i2c_add_driver(&ak4535_i2c_driver);
	if (ret != 0) {
		printk(KERN_ERR "Failed to register AK4535 I2C driver: %d\n",
		       ret);
	}
#endif
	return ret;
}
module_init(ak4535_modinit);

static void __exit ak4535_exit(void)
{
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	i2c_del_driver(&ak4535_i2c_driver);
#endif
}
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>
5a0e3ad6	22	#include <linux/slab.h>
796d2ca8 RP	23	#include <sound/core.h>
	24	#include <sound/pcm.h>
	25	#include <sound/pcm_params.h>
	26	#include <sound/soc.h>
	27	#include <sound/soc-dapm.h>
	28	#include <sound/initval.h>
	29
	30	#include "ak4535.h"
	31
796d2ca8 RP	32	#define AK4535_VERSION "0.3"
796d2ca8 RP	33
796d2ca8 RP	34	/* codec private data */
	35	struct ak4535_priv {
	36	unsigned int sysclk;
f0fba2ad LG	37	enum snd_soc_control_type control_type;
f0fba2ad LG	38	void *control_data;
796d2ca8 RP	39	};
	40
	41	/*
	42	* ak4535 register cache
	43	*/
	44	static const u16 ak4535_reg[AK4535_CACHEREGNUM] = {
	45	0x0000, 0x0080, 0x0000, 0x0003,
	46	0x0002, 0x0000, 0x0011, 0x0001,
	47	0x0000, 0x0040, 0x0036, 0x0010,
	48	0x0000, 0x0000, 0x0057, 0x0000,
	49	};
	50
	51	/*
	52	* read ak4535 register cache
	53	*/
	54	static inline unsigned int ak4535_read_reg_cache(struct snd_soc_codec *codec,
	55	unsigned int reg)
	56	{
	57	u16 *cache = codec->reg_cache;
	58	if (reg >= AK4535_CACHEREGNUM)
	59	return -1;
	60	return cache[reg];
	61	}
	62
796d2ca8 RP	63	/*
	64	* write ak4535 register cache
	65	*/
	66	static inline void ak4535_write_reg_cache(struct snd_soc_codec *codec,
	67	u16 reg, unsigned int value)
	68	{
	69	u16 *cache = codec->reg_cache;
	70	if (reg >= AK4535_CACHEREGNUM)
	71	return;
	72	cache[reg] = value;
	73	}
	74
	75	/*
	76	* write to the AK4535 register space
	77	*/
	78	static int ak4535_write(struct snd_soc_codec *codec, unsigned int reg,
	79	unsigned int value)
	80	{
	81	u8 data[2];
	82
	83	/* data is
	84	* D15..D8 AK4535 register offset
	85	* D7...D0 register data
	86	*/
	87	data[0] = reg & 0xff;
	88	data[1] = value & 0xff;
	89
	90	ak4535_write_reg_cache(codec, reg, value);
	91	if (codec->hw_write(codec->control_data, data, 2) == 2)
	92	return 0;
	93	else
	94	return -EIO;
	95	}
	96
	97	static int ak4535_sync(struct snd_soc_codec *codec)
	98	{
	99	u16 *cache = codec->reg_cache;
	100	int i, r = 0;
	101
	102	for (i = 0; i < AK4535_CACHEREGNUM; i++)
	103	r \|= ak4535_write(codec, i, cache[i]);
	104
	105	return r;
	106	};
	107
	108	static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"};
	109	static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"};
	110	static const char *ak4535_hp_out[] = {"Stereo", "Mono"};
	111	static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"};
	112	static const char *ak4535_mic_select[] = {"Internal", "External"};
	113
	114	static const struct soc_enum ak4535_enum[] = {
	115	SOC_ENUM_SINGLE(AK4535_SIG1, 7, 2, ak4535_mono_gain),
	116	SOC_ENUM_SINGLE(AK4535_SIG1, 6, 2, ak4535_mono_out),
	117	SOC_ENUM_SINGLE(AK4535_MODE2, 2, 2, ak4535_hp_out),
	118	SOC_ENUM_SINGLE(AK4535_DAC, 0, 4, ak4535_deemp),
	119	SOC_ENUM_SINGLE(AK4535_MIC, 1, 2, ak4535_mic_select),
	120	};
	121
	122	static const struct snd_kcontrol_new ak4535_snd_controls[] = {
	123	SOC_SINGLE("ALC2 Switch", AK4535_SIG1, 1, 1, 0),
	124	SOC_ENUM("Mono 1 Output", ak4535_enum[1]),
	125	SOC_ENUM("Mono 1 Gain", ak4535_enum[0]),
	126	SOC_ENUM("Headphone Output", ak4535_enum[2]),
127	SOC_ENUM("Playback Deemphasis", ak4535_enum[3]),
128	SOC_SINGLE("Bass Volume", AK4535_DAC, 2, 3, 0),
129	SOC_SINGLE("Mic Boost (+20dB) Switch", AK4535_MIC, 0, 1, 0),
130	SOC_ENUM("Mic Select", ak4535_enum[4]),
131	SOC_SINGLE("ALC Operation Time", AK4535_TIMER, 0, 3, 0),
132	SOC_SINGLE("ALC Recovery Time", AK4535_TIMER, 2, 3, 0),
133	SOC_SINGLE("ALC ZC Time", AK4535_TIMER, 4, 3, 0),
134	SOC_SINGLE("ALC 1 Switch", AK4535_ALC1, 5, 1, 0),
135	SOC_SINGLE("ALC 2 Switch", AK4535_ALC1, 6, 1, 0),
136	SOC_SINGLE("ALC Volume", AK4535_ALC2, 0, 127, 0),
137	SOC_SINGLE("Capture Volume", AK4535_PGA, 0, 127, 0),
138	SOC_SINGLE("Left Playback Volume", AK4535_LATT, 0, 127, 1),
139	SOC_SINGLE("Right Playback Volume", AK4535_RATT, 0, 127, 1),
140	SOC_SINGLE("AUX Bypass Volume", AK4535_VOL, 0, 15, 0),
141	SOC_SINGLE("Mic Sidetone Volume", AK4535_VOL, 4, 7, 0),
142	};
143
796d2ca8 RP	144	/* Mono 1 Mixer */
	145	static const struct snd_kcontrol_new ak4535_mono1_mixer_controls[] = {
	146	SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG1, 4, 1, 0),
	147	SOC_DAPM_SINGLE("Mono Playback Switch", AK4535_SIG1, 5, 1, 0),
	148	};
	149
	150	/* Stereo Mixer */
	151	static const struct snd_kcontrol_new ak4535_stereo_mixer_controls[] = {
	152	SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG2, 4, 1, 0),
	153	SOC_DAPM_SINGLE("Playback Switch", AK4535_SIG2, 7, 1, 0),
	154	SOC_DAPM_SINGLE("Aux Bypass Switch", AK4535_SIG2, 5, 1, 0),
	155	};
	156
	157	/* Input Mixer */
	158	static const struct snd_kcontrol_new ak4535_input_mixer_controls[] = {
	159	SOC_DAPM_SINGLE("Mic Capture Switch", AK4535_MIC, 2, 1, 0),
	160	SOC_DAPM_SINGLE("Aux Capture Switch", AK4535_MIC, 5, 1, 0),
	161	};
	162
	163	/* Input mux */
	164	static const struct snd_kcontrol_new ak4535_input_mux_control =
	165	SOC_DAPM_ENUM("Input Select", ak4535_enum[4]);
	166
	167	/* HP L switch */
	168	static const struct snd_kcontrol_new ak4535_hpl_control =
	169	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1);
	170
	171	/* HP R switch */
	172	static const struct snd_kcontrol_new ak4535_hpr_control =
	173	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1);
	174
	175	/* mono 2 switch */
	176	static const struct snd_kcontrol_new ak4535_mono2_control =
	177	SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0);
	178
	179	/* Line out switch */
	180	static const struct snd_kcontrol_new ak4535_line_control =
	181	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0);
	182
	183	/* ak4535 dapm widgets */
	184	static const struct snd_soc_dapm_widget ak4535_dapm_widgets[] = {
	185	SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
	186	&ak4535_stereo_mixer_controls[0],
	187	ARRAY_SIZE(ak4535_stereo_mixer_controls)),
	188	SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
	189	&ak4535_mono1_mixer_controls[0],
	190	ARRAY_SIZE(ak4535_mono1_mixer_controls)),
	191	SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
	192	&ak4535_input_mixer_controls[0],
	193	ARRAY_SIZE(ak4535_input_mixer_controls)),
	194	SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
	195	&ak4535_input_mux_control),
	196	SND_SOC_DAPM_DAC("DAC", "Playback", AK4535_PM2, 0, 0),
	197	SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
	198	&ak4535_mono2_control),
	199	/* speaker powersave bit */
	200	SND_SOC_DAPM_PGA("Speaker Enable", AK4535_MODE2, 0, 0, NULL, 0),
	201	SND_SOC_DAPM_SWITCH("Line Out Enable", SND_SOC_NOPM, 0, 0,
	202	&ak4535_line_control),
	203	SND_SOC_DAPM_SWITCH("Left HP Enable", SND_SOC_NOPM, 0, 0,
	204	&ak4535_hpl_control),
	205	SND_SOC_DAPM_SWITCH("Right HP Enable", SND_SOC_NOPM, 0, 0,
	206	&ak4535_hpr_control),
	207	SND_SOC_DAPM_OUTPUT("LOUT"),
208	SND_SOC_DAPM_OUTPUT("HPL"),
209	SND_SOC_DAPM_OUTPUT("ROUT"),
210	SND_SOC_DAPM_OUTPUT("HPR"),
211	SND_SOC_DAPM_OUTPUT("SPP"),
212	SND_SOC_DAPM_OUTPUT("SPN"),
213	SND_SOC_DAPM_OUTPUT("MOUT1"),
214	SND_SOC_DAPM_OUTPUT("MOUT2"),
215	SND_SOC_DAPM_OUTPUT("MICOUT"),
216	SND_SOC_DAPM_ADC("ADC", "Capture", AK4535_PM1, 0, 0),
217	SND_SOC_DAPM_PGA("Spk Amp", AK4535_PM2, 3, 0, NULL, 0),
218	SND_SOC_DAPM_PGA("HP R Amp", AK4535_PM2, 1, 0, NULL, 0),
219	SND_SOC_DAPM_PGA("HP L Amp", AK4535_PM2, 2, 0, NULL, 0),
220	SND_SOC_DAPM_PGA("Mic", AK4535_PM1, 1, 0, NULL, 0),
221	SND_SOC_DAPM_PGA("Line Out", AK4535_PM1, 4, 0, NULL, 0),
222	SND_SOC_DAPM_PGA("Mono Out", AK4535_PM1, 3, 0, NULL, 0),
223	SND_SOC_DAPM_PGA("AUX In", AK4535_PM1, 2, 0, NULL, 0),
224
225	SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4535_MIC, 3, 0),
226	SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4535_MIC, 4, 0),
227	SND_SOC_DAPM_INPUT("MICIN"),
228	SND_SOC_DAPM_INPUT("MICEXT"),
229	SND_SOC_DAPM_INPUT("AUX"),
230	SND_SOC_DAPM_INPUT("MIN"),
231	SND_SOC_DAPM_INPUT("AIN"),
232	};
233
234	static const struct snd_soc_dapm_route audio_map[] = {
235	/stereo mixer /
236	{"Stereo Mixer", "Playback Switch", "DAC"},
237	{"Stereo Mixer", "Mic Sidetone Switch", "Mic"},
238	{"Stereo Mixer", "Aux Bypass Switch", "AUX In"},
239
240	/* mono1 mixer */
241	{"Mono1 Mixer", "Mic Sidetone Switch", "Mic"},
242	{"Mono1 Mixer", "Mono Playback Switch", "DAC"},
243
244	/* Mic */
245	{"Mic", NULL, "AIN"},
246	{"Input Mux", "Internal", "Mic Int Bias"},
247	{"Input Mux", "External", "Mic Ext Bias"},
248	{"Mic Int Bias", NULL, "MICIN"},
249	{"Mic Ext Bias", NULL, "MICEXT"},
250	{"MICOUT", NULL, "Input Mux"},
251
252	/* line out */
253	{"LOUT", NULL, "Line Out Enable"},
254	{"ROUT", NULL, "Line Out Enable"},
255	{"Line Out Enable", "Switch", "Line Out"},
256	{"Line Out", NULL, "Stereo Mixer"},
257
258	/* mono1 out */
259	{"MOUT1", NULL, "Mono Out"},
260	{"Mono Out", NULL, "Mono1 Mixer"},
261
262	/* left HP */
263	{"HPL", NULL, "Left HP Enable"},
264	{"Left HP Enable", "Switch", "HP L Amp"},
265	{"HP L Amp", NULL, "Stereo Mixer"},
266
267	/* right HP */
268	{"HPR", NULL, "Right HP Enable"},
269	{"Right HP Enable", "Switch", "HP R Amp"},
270	{"HP R Amp", NULL, "Stereo Mixer"},
271
272	/* speaker */
273	{"SPP", NULL, "Speaker Enable"},
274	{"SPN", NULL, "Speaker Enable"},
275	{"Speaker Enable", "Switch", "Spk Amp"},
276	{"Spk Amp", NULL, "MIN"},
277
278	/* mono 2 */
279	{"MOUT2", NULL, "Mono 2 Enable"},
280	{"Mono 2 Enable", "Switch", "Stereo Mixer"},
281
282	/* Aux In */
283	{"Aux In", NULL, "AUX"},
284
285	/* ADC */
286	{"ADC", NULL, "Input Mixer"},
287	{"Input Mixer", "Mic Capture Switch", "Mic"},
288	{"Input Mixer", "Aux Capture Switch", "Aux In"},
289	};
290
291	static int ak4535_add_widgets(struct snd_soc_codec *codec)
292	{
293	snd_soc_dapm_new_controls(codec, ak4535_dapm_widgets,
294	ARRAY_SIZE(ak4535_dapm_widgets));
295
296	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
297
796d2ca8 RP	298	return 0;
	299	}
	300
e550e17f	301	static int ak4535_set_dai_sysclk(struct snd_soc_dai *codec_dai,
796d2ca8 RP	302	int clk_id, unsigned int freq, int dir)
	303	{
	304	struct snd_soc_codec *codec = codec_dai->codec;
b2c812e2	305	struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
796d2ca8 RP	306
	307	ak4535->sysclk = freq;
	308	return 0;
	309	}
	310
	311	static int ak4535_hw_params(struct snd_pcm_substream *substream,
dee89c4d MB	312	struct snd_pcm_hw_params *params,
dee89c4d MB	313	struct snd_soc_dai *dai)
796d2ca8 RP	314	{
796d2ca8 RP	315	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	316	struct snd_soc_codec *codec = rtd->codec;
b2c812e2	317	struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
796d2ca8 RP	318	u8 mode2 = ak4535_read_reg_cache(codec, AK4535_MODE2) & ~(0x3 << 5);
	319	int rate = params_rate(params), fs = 256;
	320
	321	if (rate)
	322	fs = ak4535->sysclk / rate;
	323
	324	/* set fs */
	325	switch (fs) {
	326	case 1024:
	327	mode2 \|= (0x2 << 5);
	328	break;
	329	case 512:
	330	mode2 \|= (0x1 << 5);
	331	break;
	332	case 256:
	333	break;
	334	}
	335
	336	/* set rate */
	337	ak4535_write(codec, AK4535_MODE2, mode2);
	338	return 0;
	339	}
	340
e550e17f	341	static int ak4535_set_dai_fmt(struct snd_soc_dai *codec_dai,
796d2ca8 RP	342	unsigned int fmt)
	343	{
	344	struct snd_soc_codec *codec = codec_dai->codec;
	345	u8 mode1 = 0;
	346
	347	/* interface format */
	348	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	349	case SND_SOC_DAIFMT_I2S:
	350	mode1 = 0x0002;
	351	break;
	352	case SND_SOC_DAIFMT_LEFT_J:
	353	mode1 = 0x0001;
	354	break;
	355	default:
	356	return -EINVAL;
	357	}
	358
	359	/* use 32 fs for BCLK to save power */
	360	mode1 \|= 0x4;
	361
	362	ak4535_write(codec, AK4535_MODE1, mode1);
	363	return 0;
	364	}
	365
e550e17f	366	static int ak4535_mute(struct snd_soc_dai *dai, int mute)
796d2ca8 RP	367	{
	368	struct snd_soc_codec *codec = dai->codec;
	369	u16 mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC) & 0xffdf;
	370	if (!mute)
	371	ak4535_write(codec, AK4535_DAC, mute_reg);
	372	else
	373	ak4535_write(codec, AK4535_DAC, mute_reg \| 0x20);
	374	return 0;
	375	}
	376
	377	static int ak4535_set_bias_level(struct snd_soc_codec *codec,
	378	enum snd_soc_bias_level level)
	379	{
f0fba2ad	380	u16 i, mute_reg;
796d2ca8 RP	381
	382	switch (level) {
	383	case SND_SOC_BIAS_ON:
f0fba2ad LG	384	mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC) & 0xffdf;
f0fba2ad LG	385	ak4535_write(codec, AK4535_DAC, mute_reg);
796d2ca8 RP	386	break;
796d2ca8 RP	387	case SND_SOC_BIAS_PREPARE:
f0fba2ad LG	388	mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC) & 0xffdf;
f0fba2ad LG	389	ak4535_write(codec, AK4535_DAC, mute_reg \| 0x20);
796d2ca8 RP	390	break;
	391	case SND_SOC_BIAS_STANDBY:
	392	i = ak4535_read_reg_cache(codec, AK4535_PM1);
	393	ak4535_write(codec, AK4535_PM1, i \| 0x80);
	394	i = ak4535_read_reg_cache(codec, AK4535_PM2);
	395	ak4535_write(codec, AK4535_PM2, i & (~0x80));
	396	break;
	397	case SND_SOC_BIAS_OFF:
	398	i = ak4535_read_reg_cache(codec, AK4535_PM1);
	399	ak4535_write(codec, AK4535_PM1, i & (~0x80));
	400	break;
	401	}
	402	codec->bias_level = level;
	403	return 0;
	404	}
	405
	406	#define AK4535_RATES (SNDRV_PCM_RATE_8000 \| SNDRV_PCM_RATE_11025 \|\
	407	SNDRV_PCM_RATE_16000 \| SNDRV_PCM_RATE_22050 \|\
	408	SNDRV_PCM_RATE_44100 \| SNDRV_PCM_RATE_48000)
	409
6335d055 EM	410	static struct snd_soc_dai_ops ak4535_dai_ops = {
	411	.hw_params = ak4535_hw_params,
	412	.set_fmt = ak4535_set_dai_fmt,
	413	.digital_mute = ak4535_mute,
	414	.set_sysclk = ak4535_set_dai_sysclk,
	415	};
	416
f0fba2ad LG	417	static struct snd_soc_dai_driver ak4535_dai = {
f0fba2ad LG	418	.name = "ak4535-hifi",
796d2ca8 RP	419	.playback = {
	420	.stream_name = "Playback",
	421	.channels_min = 1,
	422	.channels_max = 2,
	423	.rates = AK4535_RATES,
	424	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	425	.capture = {
	426	.stream_name = "Capture",
	427	.channels_min = 1,
	428	.channels_max = 2,
	429	.rates = AK4535_RATES,
	430	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
6335d055	431	.ops = &ak4535_dai_ops,
796d2ca8	432	};
796d2ca8	433
f0fba2ad	434	static int ak4535_suspend(struct snd_soc_codec *codec, pm_message_t state)
796d2ca8	435	{
796d2ca8 RP	436	ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
	437	return 0;
	438	}
	439
f0fba2ad	440	static int ak4535_resume(struct snd_soc_codec *codec)
796d2ca8	441	{
796d2ca8 RP	442	ak4535_sync(codec);
796d2ca8 RP	443	ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
796d2ca8 RP	444	return 0;
	445	}
	446
f0fba2ad	447	static int ak4535_probe(struct snd_soc_codec *codec)
796d2ca8	448	{
f0fba2ad	449	struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
796d2ca8	450
f0fba2ad	451	printk(KERN_INFO "AK4535 Audio Codec %s", AK4535_VERSION);
796d2ca8	452
f0fba2ad	453	codec->control_data = ak4535->control_data;
796d2ca8 RP	454
	455	/* power on device */
	456	ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	457
3e8e1952 IM	458	snd_soc_add_controls(codec, ak4535_snd_controls,
3e8e1952 IM	459	ARRAY_SIZE(ak4535_snd_controls));
796d2ca8	460	ak4535_add_widgets(codec);
796d2ca8	461
f0fba2ad LG	462	return 0;
f0fba2ad LG	463	}
796d2ca8	464
f0fba2ad LG	465	/* power down chip */
	466	static int ak4535_remove(struct snd_soc_codec *codec)
	467	{
	468	ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
	469	return 0;
796d2ca8 RP	470	}
796d2ca8 RP	471
f0fba2ad LG	472	static struct snd_soc_codec_driver soc_codec_dev_ak4535 = {
	473	.probe = ak4535_probe,
	474	.remove = ak4535_remove,
	475	.suspend = ak4535_suspend,
	476	.resume = ak4535_resume,
	477	.read = ak4535_read_reg_cache,
	478	.write = ak4535_write,
	479	.set_bias_level = ak4535_set_bias_level,
	480	.reg_cache_size = ARRAY_SIZE(ak4535_reg),
	481	.reg_word_size = sizeof(u8),
	482	.reg_cache_default = ak4535_reg,
	483	};
796d2ca8 RP	484
796d2ca8 RP	485	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
f0fba2ad LG	486	static __devinit int ak4535_i2c_probe(struct i2c_client *i2c,
f0fba2ad LG	487	const struct i2c_device_id *id)
796d2ca8	488	{
f0fba2ad	489	struct ak4535_priv *ak4535;
796d2ca8 RP	490	int ret;
796d2ca8 RP	491
f0fba2ad LG	492	ak4535 = kzalloc(sizeof(struct ak4535_priv), GFP_KERNEL);
	493	if (ak4535 == NULL)
	494	return -ENOMEM;
796d2ca8	495
f0fba2ad LG	496	i2c_set_clientdata(i2c, ak4535);
	497	ak4535->control_data = i2c;
	498	ak4535->control_type = SND_SOC_I2C;
796d2ca8	499
f0fba2ad LG	500	ret = snd_soc_register_codec(&i2c->dev,
	501	&soc_codec_dev_ak4535, &ak4535_dai, 1);
	502	if (ret < 0)
	503	kfree(ak4535);
796d2ca8 RP	504	return ret;
	505	}
	506
f0fba2ad	507	static __devexit int ak4535_i2c_remove(struct i2c_client *client)
796d2ca8	508	{
f0fba2ad LG	509	snd_soc_unregister_codec(&client->dev);
f0fba2ad LG	510	kfree(i2c_get_clientdata(client));
796d2ca8 RP	511	return 0;
	512	}
	513
d28d2713 JD	514	static const struct i2c_device_id ak4535_i2c_id[] = {
	515	{ "ak4535", 0 },
	516	{ }
	517	};
	518	MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id);
796d2ca8	519
796d2ca8 RP	520	static struct i2c_driver ak4535_i2c_driver = {
796d2ca8 RP	521	.driver = {
f0fba2ad	522	.name = "ak4535-codec",
796d2ca8 RP	523	.owner = THIS_MODULE,
796d2ca8 RP	524	},
d28d2713	525	.probe = ak4535_i2c_probe,
f0fba2ad	526	.remove = __devexit_p(ak4535_i2c_remove),
d28d2713	527	.id_table = ak4535_i2c_id,
796d2ca8	528	};
796d2ca8 RP	529	#endif
796d2ca8 RP	530
f0fba2ad	531	static int __init ak4535_modinit(void)
796d2ca8	532	{
f0fba2ad	533	int ret = 0;
796d2ca8	534	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
f0fba2ad	535	ret = i2c_add_driver(&ak4535_i2c_driver);
3051e41a	536	if (ret != 0) {
f0fba2ad LG	537	printk(KERN_ERR "Failed to register AK4535 I2C driver: %d\n",
f0fba2ad LG	538	ret);
3051e41a	539	}
f0fba2ad	540	#endif
796d2ca8 RP	541	return ret;
796d2ca8 RP	542	}
f0fba2ad	543	module_init(ak4535_modinit);
796d2ca8	544
f0fba2ad	545	static void __exit ak4535_exit(void)
796d2ca8	546	{
796d2ca8 RP	547	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	548	i2c_del_driver(&ak4535_i2c_driver);
	549	#endif
64089b84 MB	550	}
	551	module_exit(ak4535_exit);
	552
796d2ca8 RP	553	MODULE_DESCRIPTION("Soc AK4535 driver");
	554	MODULE_AUTHOR("Richard Purdie");
	555	MODULE_LICENSE("GPL");