[linux-2.6-block.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/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 ak4535_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_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);
	if (!mute)
		ak4535_write(codec, AK4535_DAC, mute_reg & ~0x20);
	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);
		ak4535_write(codec, AK4535_DAC, mute_reg & ~0x20);
		break;
	case SND_SOC_BIAS_PREPARE:
		mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC);
		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->dapm.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));
	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,
	.dapm_widgets = ak4535_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(ak4535_dapm_widgets),
	.dapm_routes = ak4535_audio_map,
	.num_dapm_routes = ARRAY_SIZE(ak4535_audio_map),
};

#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>
796d2ca8 RP	27	#include <sound/initval.h>
	28
	29	#include "ak4535.h"
	30
796d2ca8 RP	31	#define AK4535_VERSION "0.3"
796d2ca8 RP	32
796d2ca8 RP	33	/* codec private data */
	34	struct ak4535_priv {
	35	unsigned int sysclk;
f0fba2ad LG	36	enum snd_soc_control_type control_type;
f0fba2ad LG	37	void *control_data;
796d2ca8 RP	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
796d2ca8 RP	62	/*
	63	* write ak4535 register cache
	64	*/
	65	static inline void ak4535_write_reg_cache(struct snd_soc_codec *codec,
	66	u16 reg, unsigned int value)
	67	{
	68	u16 *cache = codec->reg_cache;
	69	if (reg >= AK4535_CACHEREGNUM)
	70	return;
	71	cache[reg] = value;
	72	}
	73
	74	/*
	75	* write to the AK4535 register space
	76	*/
	77	static int ak4535_write(struct snd_soc_codec *codec, unsigned int reg,
	78	unsigned int value)
	79	{
	80	u8 data[2];
	81
	82	/* data is
	83	* D15..D8 AK4535 register offset
	84	* D7...D0 register data
	85	*/
	86	data[0] = reg & 0xff;
	87	data[1] = value & 0xff;
	88
	89	ak4535_write_reg_cache(codec, reg, value);
	90	if (codec->hw_write(codec->control_data, data, 2) == 2)
	91	return 0;
	92	else
	93	return -EIO;
	94	}
	95
	96	static int ak4535_sync(struct snd_soc_codec *codec)
	97	{
	98	u16 *cache = codec->reg_cache;
	99	int i, r = 0;
	100
	101	for (i = 0; i < AK4535_CACHEREGNUM; i++)
	102	r \|= ak4535_write(codec, i, cache[i]);
	103
	104	return r;
	105	};
	106
	107	static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"};
	108	static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"};
	109	static const char *ak4535_hp_out[] = {"Stereo", "Mono"};
	110	static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"};
	111	static const char *ak4535_mic_select[] = {"Internal", "External"};
	112
	113	static const struct soc_enum ak4535_enum[] = {
	114	SOC_ENUM_SINGLE(AK4535_SIG1, 7, 2, ak4535_mono_gain),
	115	SOC_ENUM_SINGLE(AK4535_SIG1, 6, 2, ak4535_mono_out),
	116	SOC_ENUM_SINGLE(AK4535_MODE2, 2, 2, ak4535_hp_out),
	117	SOC_ENUM_SINGLE(AK4535_DAC, 0, 4, ak4535_deemp),
	118	SOC_ENUM_SINGLE(AK4535_MIC, 1, 2, ak4535_mic_select),
	119	};
	120
	121	static const struct snd_kcontrol_new ak4535_snd_controls[] = {
	122	SOC_SINGLE("ALC2 Switch", AK4535_SIG1, 1, 1, 0),
	123	SOC_ENUM("Mono 1 Output", ak4535_enum[1]),
	124	SOC_ENUM("Mono 1 Gain", ak4535_enum[0]),
	125	SOC_ENUM("Headphone Output", ak4535_enum[2]),
126	SOC_ENUM("Playback Deemphasis", ak4535_enum[3]),
127	SOC_SINGLE("Bass Volume", AK4535_DAC, 2, 3, 0),
128	SOC_SINGLE("Mic Boost (+20dB) Switch", AK4535_MIC, 0, 1, 0),
129	SOC_ENUM("Mic Select", ak4535_enum[4]),
130	SOC_SINGLE("ALC Operation Time", AK4535_TIMER, 0, 3, 0),
131	SOC_SINGLE("ALC Recovery Time", AK4535_TIMER, 2, 3, 0),
132	SOC_SINGLE("ALC ZC Time", AK4535_TIMER, 4, 3, 0),
133	SOC_SINGLE("ALC 1 Switch", AK4535_ALC1, 5, 1, 0),
134	SOC_SINGLE("ALC 2 Switch", AK4535_ALC1, 6, 1, 0),
135	SOC_SINGLE("ALC Volume", AK4535_ALC2, 0, 127, 0),
136	SOC_SINGLE("Capture Volume", AK4535_PGA, 0, 127, 0),
137	SOC_SINGLE("Left Playback Volume", AK4535_LATT, 0, 127, 1),
138	SOC_SINGLE("Right Playback Volume", AK4535_RATT, 0, 127, 1),
139	SOC_SINGLE("AUX Bypass Volume", AK4535_VOL, 0, 15, 0),
140	SOC_SINGLE("Mic Sidetone Volume", AK4535_VOL, 4, 7, 0),
141	};
142
796d2ca8 RP	143	/* Mono 1 Mixer */
	144	static const struct snd_kcontrol_new ak4535_mono1_mixer_controls[] = {
	145	SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG1, 4, 1, 0),
	146	SOC_DAPM_SINGLE("Mono Playback Switch", AK4535_SIG1, 5, 1, 0),
	147	};
	148
	149	/* Stereo Mixer */
	150	static const struct snd_kcontrol_new ak4535_stereo_mixer_controls[] = {
	151	SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG2, 4, 1, 0),
	152	SOC_DAPM_SINGLE("Playback Switch", AK4535_SIG2, 7, 1, 0),
	153	SOC_DAPM_SINGLE("Aux Bypass Switch", AK4535_SIG2, 5, 1, 0),
	154	};
	155
	156	/* Input Mixer */
	157	static const struct snd_kcontrol_new ak4535_input_mixer_controls[] = {
	158	SOC_DAPM_SINGLE("Mic Capture Switch", AK4535_MIC, 2, 1, 0),
	159	SOC_DAPM_SINGLE("Aux Capture Switch", AK4535_MIC, 5, 1, 0),
	160	};
	161
	162	/* Input mux */
	163	static const struct snd_kcontrol_new ak4535_input_mux_control =
	164	SOC_DAPM_ENUM("Input Select", ak4535_enum[4]);
	165
	166	/* HP L switch */
	167	static const struct snd_kcontrol_new ak4535_hpl_control =
	168	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1);
	169
	170	/* HP R switch */
	171	static const struct snd_kcontrol_new ak4535_hpr_control =
	172	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1);
	173
	174	/* mono 2 switch */
	175	static const struct snd_kcontrol_new ak4535_mono2_control =
	176	SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0);
	177
	178	/* Line out switch */
	179	static const struct snd_kcontrol_new ak4535_line_control =
	180	SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0);
	181
	182	/* ak4535 dapm widgets */
	183	static const struct snd_soc_dapm_widget ak4535_dapm_widgets[] = {
	184	SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
	185	&ak4535_stereo_mixer_controls[0],
	186	ARRAY_SIZE(ak4535_stereo_mixer_controls)),
	187	SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
	188	&ak4535_mono1_mixer_controls[0],
	189	ARRAY_SIZE(ak4535_mono1_mixer_controls)),
	190	SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
	191	&ak4535_input_mixer_controls[0],
	192	ARRAY_SIZE(ak4535_input_mixer_controls)),
	193	SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
	194	&ak4535_input_mux_control),
	195	SND_SOC_DAPM_DAC("DAC", "Playback", AK4535_PM2, 0, 0),
	196	SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
	197	&ak4535_mono2_control),
	198	/* speaker powersave bit */
	199	SND_SOC_DAPM_PGA("Speaker Enable", AK4535_MODE2, 0, 0, NULL, 0),
	200	SND_SOC_DAPM_SWITCH("Line Out Enable", SND_SOC_NOPM, 0, 0,
	201	&ak4535_line_control),
	202	SND_SOC_DAPM_SWITCH("Left HP Enable", SND_SOC_NOPM, 0, 0,
	203	&ak4535_hpl_control),
	204	SND_SOC_DAPM_SWITCH("Right HP Enable", SND_SOC_NOPM, 0, 0,
	205	&ak4535_hpr_control),
	206	SND_SOC_DAPM_OUTPUT("LOUT"),
207	SND_SOC_DAPM_OUTPUT("HPL"),
208	SND_SOC_DAPM_OUTPUT("ROUT"),
209	SND_SOC_DAPM_OUTPUT("HPR"),
210	SND_SOC_DAPM_OUTPUT("SPP"),
211	SND_SOC_DAPM_OUTPUT("SPN"),
212	SND_SOC_DAPM_OUTPUT("MOUT1"),
213	SND_SOC_DAPM_OUTPUT("MOUT2"),
214	SND_SOC_DAPM_OUTPUT("MICOUT"),
215	SND_SOC_DAPM_ADC("ADC", "Capture", AK4535_PM1, 0, 0),
216	SND_SOC_DAPM_PGA("Spk Amp", AK4535_PM2, 3, 0, NULL, 0),
217	SND_SOC_DAPM_PGA("HP R Amp", AK4535_PM2, 1, 0, NULL, 0),
218	SND_SOC_DAPM_PGA("HP L Amp", AK4535_PM2, 2, 0, NULL, 0),
219	SND_SOC_DAPM_PGA("Mic", AK4535_PM1, 1, 0, NULL, 0),
220	SND_SOC_DAPM_PGA("Line Out", AK4535_PM1, 4, 0, NULL, 0),
221	SND_SOC_DAPM_PGA("Mono Out", AK4535_PM1, 3, 0, NULL, 0),
222	SND_SOC_DAPM_PGA("AUX In", AK4535_PM1, 2, 0, NULL, 0),
223
224	SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4535_MIC, 3, 0),
225	SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4535_MIC, 4, 0),
226	SND_SOC_DAPM_INPUT("MICIN"),
227	SND_SOC_DAPM_INPUT("MICEXT"),
228	SND_SOC_DAPM_INPUT("AUX"),
229	SND_SOC_DAPM_INPUT("MIN"),
230	SND_SOC_DAPM_INPUT("AIN"),
231	};
232
b63c963d	233	static const struct snd_soc_dapm_route ak4535_audio_map[] = {
796d2ca8 RP	234	/stereo mixer /
	235	{"Stereo Mixer", "Playback Switch", "DAC"},
	236	{"Stereo Mixer", "Mic Sidetone Switch", "Mic"},
	237	{"Stereo Mixer", "Aux Bypass Switch", "AUX In"},
	238
	239	/* mono1 mixer */
	240	{"Mono1 Mixer", "Mic Sidetone Switch", "Mic"},
	241	{"Mono1 Mixer", "Mono Playback Switch", "DAC"},
	242
	243	/* Mic */
	244	{"Mic", NULL, "AIN"},
	245	{"Input Mux", "Internal", "Mic Int Bias"},
	246	{"Input Mux", "External", "Mic Ext Bias"},
	247	{"Mic Int Bias", NULL, "MICIN"},
	248	{"Mic Ext Bias", NULL, "MICEXT"},
	249	{"MICOUT", NULL, "Input Mux"},
	250
	251	/* line out */
	252	{"LOUT", NULL, "Line Out Enable"},
	253	{"ROUT", NULL, "Line Out Enable"},
	254	{"Line Out Enable", "Switch", "Line Out"},
	255	{"Line Out", NULL, "Stereo Mixer"},
	256
	257	/* mono1 out */
	258	{"MOUT1", NULL, "Mono Out"},
	259	{"Mono Out", NULL, "Mono1 Mixer"},
	260
	261	/* left HP */
	262	{"HPL", NULL, "Left HP Enable"},
	263	{"Left HP Enable", "Switch", "HP L Amp"},
	264	{"HP L Amp", NULL, "Stereo Mixer"},
	265
	266	/* right HP */
	267	{"HPR", NULL, "Right HP Enable"},
	268	{"Right HP Enable", "Switch", "HP R Amp"},
	269	{"HP R Amp", NULL, "Stereo Mixer"},
	270
	271	/* speaker */
	272	{"SPP", NULL, "Speaker Enable"},
	273	{"SPN", NULL, "Speaker Enable"},
	274	{"Speaker Enable", "Switch", "Spk Amp"},
	275	{"Spk Amp", NULL, "MIN"},
	276
	277	/* mono 2 */
	278	{"MOUT2", NULL, "Mono 2 Enable"},
	279	{"Mono 2 Enable", "Switch", "Stereo Mixer"},
	280
	281	/* Aux In */
	282	{"Aux In", NULL, "AUX"},
	283
	284	/* ADC */
	285	{"ADC", NULL, "Input Mixer"},
	286	{"Input Mixer", "Mic Capture Switch", "Mic"},
	287	{"Input Mixer", "Aux Capture Switch", "Aux In"},
	288	};
	289
e550e17f	290	static int ak4535_set_dai_sysclk(struct snd_soc_dai *codec_dai,
796d2ca8 RP	291	int clk_id, unsigned int freq, int dir)
	292	{
	293	struct snd_soc_codec *codec = codec_dai->codec;
b2c812e2	294	struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
796d2ca8 RP	295
	296	ak4535->sysclk = freq;
	297	return 0;
	298	}
	299
	300	static int ak4535_hw_params(struct snd_pcm_substream *substream,
dee89c4d MB	301	struct snd_pcm_hw_params *params,
dee89c4d MB	302	struct snd_soc_dai *dai)
796d2ca8 RP	303	{
796d2ca8 RP	304	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad	305	struct snd_soc_codec *codec = rtd->codec;
b2c812e2	306	struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
796d2ca8 RP	307	u8 mode2 = ak4535_read_reg_cache(codec, AK4535_MODE2) & ~(0x3 << 5);
	308	int rate = params_rate(params), fs = 256;
	309
	310	if (rate)
	311	fs = ak4535->sysclk / rate;
	312
	313	/* set fs */
	314	switch (fs) {
	315	case 1024:
	316	mode2 \|= (0x2 << 5);
	317	break;
	318	case 512:
	319	mode2 \|= (0x1 << 5);
	320	break;
	321	case 256:
	322	break;
	323	}
	324
	325	/* set rate */
	326	ak4535_write(codec, AK4535_MODE2, mode2);
	327	return 0;
	328	}
	329
e550e17f	330	static int ak4535_set_dai_fmt(struct snd_soc_dai *codec_dai,
796d2ca8 RP	331	unsigned int fmt)
	332	{
	333	struct snd_soc_codec *codec = codec_dai->codec;
	334	u8 mode1 = 0;
	335
	336	/* interface format */
	337	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	338	case SND_SOC_DAIFMT_I2S:
	339	mode1 = 0x0002;
	340	break;
	341	case SND_SOC_DAIFMT_LEFT_J:
	342	mode1 = 0x0001;
	343	break;
	344	default:
	345	return -EINVAL;
	346	}
	347
	348	/* use 32 fs for BCLK to save power */
	349	mode1 \|= 0x4;
	350
	351	ak4535_write(codec, AK4535_MODE1, mode1);
	352	return 0;
	353	}
	354
e550e17f	355	static int ak4535_mute(struct snd_soc_dai *dai, int mute)
796d2ca8 RP	356	{
796d2ca8 RP	357	struct snd_soc_codec *codec = dai->codec;
cca67a36	358	u16 mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC);
796d2ca8	359	if (!mute)
cca67a36	360	ak4535_write(codec, AK4535_DAC, mute_reg & ~0x20);
796d2ca8 RP	361	else
	362	ak4535_write(codec, AK4535_DAC, mute_reg \| 0x20);
	363	return 0;
	364	}
	365
	366	static int ak4535_set_bias_level(struct snd_soc_codec *codec,
	367	enum snd_soc_bias_level level)
	368	{
f0fba2ad	369	u16 i, mute_reg;
796d2ca8 RP	370
	371	switch (level) {
	372	case SND_SOC_BIAS_ON:
cca67a36 AL	373	mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC);
cca67a36 AL	374	ak4535_write(codec, AK4535_DAC, mute_reg & ~0x20);
796d2ca8 RP	375	break;
796d2ca8 RP	376	case SND_SOC_BIAS_PREPARE:
cca67a36	377	mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC);
f0fba2ad	378	ak4535_write(codec, AK4535_DAC, mute_reg \| 0x20);
796d2ca8 RP	379	break;
	380	case SND_SOC_BIAS_STANDBY:
	381	i = ak4535_read_reg_cache(codec, AK4535_PM1);
	382	ak4535_write(codec, AK4535_PM1, i \| 0x80);
	383	i = ak4535_read_reg_cache(codec, AK4535_PM2);
	384	ak4535_write(codec, AK4535_PM2, i & (~0x80));
	385	break;
	386	case SND_SOC_BIAS_OFF:
	387	i = ak4535_read_reg_cache(codec, AK4535_PM1);
	388	ak4535_write(codec, AK4535_PM1, i & (~0x80));
	389	break;
	390	}
ce6120cc	391	codec->dapm.bias_level = level;
796d2ca8 RP	392	return 0;
	393	}
	394
	395	#define AK4535_RATES (SNDRV_PCM_RATE_8000 \| SNDRV_PCM_RATE_11025 \|\
	396	SNDRV_PCM_RATE_16000 \| SNDRV_PCM_RATE_22050 \|\
	397	SNDRV_PCM_RATE_44100 \| SNDRV_PCM_RATE_48000)
	398
6335d055 EM	399	static struct snd_soc_dai_ops ak4535_dai_ops = {
	400	.hw_params = ak4535_hw_params,
	401	.set_fmt = ak4535_set_dai_fmt,
	402	.digital_mute = ak4535_mute,
	403	.set_sysclk = ak4535_set_dai_sysclk,
	404	};
	405
f0fba2ad LG	406	static struct snd_soc_dai_driver ak4535_dai = {
f0fba2ad LG	407	.name = "ak4535-hifi",
796d2ca8 RP	408	.playback = {
	409	.stream_name = "Playback",
	410	.channels_min = 1,
	411	.channels_max = 2,
	412	.rates = AK4535_RATES,
	413	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	414	.capture = {
	415	.stream_name = "Capture",
	416	.channels_min = 1,
	417	.channels_max = 2,
	418	.rates = AK4535_RATES,
	419	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
6335d055	420	.ops = &ak4535_dai_ops,
796d2ca8	421	};
796d2ca8	422
f0fba2ad	423	static int ak4535_suspend(struct snd_soc_codec *codec, pm_message_t state)
796d2ca8	424	{
796d2ca8 RP	425	ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
	426	return 0;
	427	}
	428
f0fba2ad	429	static int ak4535_resume(struct snd_soc_codec *codec)
796d2ca8	430	{
796d2ca8 RP	431	ak4535_sync(codec);
796d2ca8 RP	432	ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
796d2ca8 RP	433	return 0;
	434	}
	435
f0fba2ad	436	static int ak4535_probe(struct snd_soc_codec *codec)
796d2ca8	437	{
f0fba2ad	438	struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
796d2ca8	439
f0fba2ad	440	printk(KERN_INFO "AK4535 Audio Codec %s", AK4535_VERSION);
796d2ca8	441
f0fba2ad	442	codec->control_data = ak4535->control_data;
796d2ca8 RP	443
	444	/* power on device */
	445	ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	446
3e8e1952 IM	447	snd_soc_add_controls(codec, ak4535_snd_controls,
3e8e1952 IM	448	ARRAY_SIZE(ak4535_snd_controls));
f0fba2ad LG	449	return 0;
f0fba2ad LG	450	}
796d2ca8	451
f0fba2ad LG	452	/* power down chip */
	453	static int ak4535_remove(struct snd_soc_codec *codec)
	454	{
	455	ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
	456	return 0;
796d2ca8 RP	457	}
796d2ca8 RP	458
f0fba2ad LG	459	static struct snd_soc_codec_driver soc_codec_dev_ak4535 = {
	460	.probe = ak4535_probe,
	461	.remove = ak4535_remove,
	462	.suspend = ak4535_suspend,
	463	.resume = ak4535_resume,
	464	.read = ak4535_read_reg_cache,
	465	.write = ak4535_write,
	466	.set_bias_level = ak4535_set_bias_level,
	467	.reg_cache_size = ARRAY_SIZE(ak4535_reg),
	468	.reg_word_size = sizeof(u8),
	469	.reg_cache_default = ak4535_reg,
b63c963d LG	470	.dapm_widgets = ak4535_dapm_widgets,
	471	.num_dapm_widgets = ARRAY_SIZE(ak4535_dapm_widgets),
	472	.dapm_routes = ak4535_audio_map,
	473	.num_dapm_routes = ARRAY_SIZE(ak4535_audio_map),
f0fba2ad	474	};
796d2ca8 RP	475
796d2ca8 RP	476	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
f0fba2ad LG	477	static __devinit int ak4535_i2c_probe(struct i2c_client *i2c,
f0fba2ad LG	478	const struct i2c_device_id *id)
796d2ca8	479	{
f0fba2ad	480	struct ak4535_priv *ak4535;
796d2ca8 RP	481	int ret;
796d2ca8 RP	482
f0fba2ad LG	483	ak4535 = kzalloc(sizeof(struct ak4535_priv), GFP_KERNEL);
	484	if (ak4535 == NULL)
	485	return -ENOMEM;
796d2ca8	486
f0fba2ad LG	487	i2c_set_clientdata(i2c, ak4535);
	488	ak4535->control_data = i2c;
	489	ak4535->control_type = SND_SOC_I2C;
796d2ca8	490
f0fba2ad LG	491	ret = snd_soc_register_codec(&i2c->dev,
	492	&soc_codec_dev_ak4535, &ak4535_dai, 1);
	493	if (ret < 0)
	494	kfree(ak4535);
796d2ca8 RP	495	return ret;
	496	}
	497
f0fba2ad	498	static __devexit int ak4535_i2c_remove(struct i2c_client *client)
796d2ca8	499	{
f0fba2ad LG	500	snd_soc_unregister_codec(&client->dev);
f0fba2ad LG	501	kfree(i2c_get_clientdata(client));
796d2ca8 RP	502	return 0;
	503	}
	504
d28d2713 JD	505	static const struct i2c_device_id ak4535_i2c_id[] = {
	506	{ "ak4535", 0 },
	507	{ }
	508	};
	509	MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id);
796d2ca8	510
796d2ca8 RP	511	static struct i2c_driver ak4535_i2c_driver = {
796d2ca8 RP	512	.driver = {
f0fba2ad	513	.name = "ak4535-codec",
796d2ca8 RP	514	.owner = THIS_MODULE,
796d2ca8 RP	515	},
d28d2713	516	.probe = ak4535_i2c_probe,
f0fba2ad	517	.remove = __devexit_p(ak4535_i2c_remove),
d28d2713	518	.id_table = ak4535_i2c_id,
796d2ca8	519	};
796d2ca8 RP	520	#endif
796d2ca8 RP	521
f0fba2ad	522	static int __init ak4535_modinit(void)
796d2ca8	523	{
f0fba2ad	524	int ret = 0;
796d2ca8	525	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
f0fba2ad	526	ret = i2c_add_driver(&ak4535_i2c_driver);
3051e41a	527	if (ret != 0) {
f0fba2ad LG	528	printk(KERN_ERR "Failed to register AK4535 I2C driver: %d\n",
f0fba2ad LG	529	ret);
3051e41a	530	}
f0fba2ad	531	#endif
796d2ca8 RP	532	return ret;
796d2ca8 RP	533	}
f0fba2ad	534	module_init(ak4535_modinit);
796d2ca8	535
f0fba2ad	536	static void __exit ak4535_exit(void)
796d2ca8	537	{
796d2ca8 RP	538	#if defined(CONFIG_I2C) \|\| defined(CONFIG_I2C_MODULE)
	539	i2c_del_driver(&ak4535_i2c_driver);
	540	#endif
64089b84 MB	541	}
	542	module_exit(ak4535_exit);
	543
796d2ca8 RP	544	MODULE_DESCRIPTION("Soc AK4535 driver");
	545	MODULE_AUTHOR("Richard Purdie");
	546	MODULE_LICENSE("GPL");