path: root/sound/soc/codecs/da7210.c

/*
 * DA7210 ALSA Soc codec driver
 *
 * Copyright (c) 2009 Dialog Semiconductor
 * Written by David Chen <Dajun.chen@diasemi.com>
 *
 * Copyright (C) 2009 Renesas Solutions Corp.
 * Cleanups by Kuninori Morimoto <morimoto.kuninori@renesas.com>
 *
 * Tested on SuperH Ecovec24 board with S16/S24 LE in 48KHz using I2S
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>

/* DA7210 register space */
#define DA7210_CONTROL			0x01
#define DA7210_STATUS			0x02
#define DA7210_STARTUP1			0x03
#define DA7210_STARTUP2			0x04
#define DA7210_STARTUP3			0x05
#define DA7210_MIC_L			0x07
#define DA7210_MIC_R			0x08
#define DA7210_AUX1_L			0x09
#define DA7210_AUX1_R			0x0A
#define DA7210_AUX2			0x0B
#define DA7210_IN_GAIN			0x0C
#define DA7210_INMIX_L			0x0D
#define DA7210_INMIX_R			0x0E
#define DA7210_ADC_HPF			0x0F
#define DA7210_ADC			0x10
#define DA7210_ADC_EQ1_2		0X11
#define DA7210_ADC_EQ3_4		0x12
#define DA7210_ADC_EQ5			0x13
#define DA7210_DAC_HPF			0x14
#define DA7210_DAC_L			0x15
#define DA7210_DAC_R			0x16
#define DA7210_DAC_SEL			0x17
#define DA7210_SOFTMUTE			0x18
#define DA7210_DAC_EQ1_2		0x19
#define DA7210_DAC_EQ3_4		0x1A
#define DA7210_DAC_EQ5			0x1B
#define DA7210_OUTMIX_L			0x1C
#define DA7210_OUTMIX_R			0x1D
#define DA7210_HP_L_VOL			0x21
#define DA7210_HP_R_VOL			0x22
#define DA7210_HP_CFG			0x23
#define DA7210_ZERO_CROSS		0x24
#define DA7210_DAI_SRC_SEL		0x25
#define DA7210_DAI_CFG1			0x26
#define DA7210_DAI_CFG3			0x28
#define DA7210_PLL_DIV1			0x29
#define DA7210_PLL_DIV2			0x2A
#define DA7210_PLL_DIV3			0x2B
#define DA7210_PLL			0x2C
#define DA7210_ALC_MAX			0x83
#define DA7210_ALC_MIN			0x84
#define DA7210_ALC_NOIS			0x85
#define DA7210_ALC_ATT			0x86
#define DA7210_ALC_REL			0x87
#define DA7210_ALC_DEL			0x88
#define DA7210_A_HID_UNLOCK		0x8A
#define DA7210_A_TEST_UNLOCK		0x8B
#define DA7210_A_PLL1			0x90
#define DA7210_A_CP_MODE		0xA7

/* STARTUP1 bit fields */
#define DA7210_SC_MST_EN		(1 << 0)

/* MIC_L bit fields */
#define DA7210_MICBIAS_EN		(1 << 6)
#define DA7210_MIC_L_EN			(1 << 7)

/* MIC_R bit fields */
#define DA7210_MIC_R_EN			(1 << 7)

/* INMIX_L bit fields */
#define DA7210_IN_L_EN			(1 << 7)

/* INMIX_R bit fields */
#define DA7210_IN_R_EN			(1 << 7)

/* ADC bit fields */
#define DA7210_ADC_ALC_EN		(1 << 0)
#define DA7210_ADC_L_EN			(1 << 3)
#define DA7210_ADC_R_EN			(1 << 7)

/* DAC/ADC HPF fields */
#define DA7210_VOICE_F0_MASK		(0x7 << 4)
#define DA7210_VOICE_F0_25		(1 << 4)
#define DA7210_VOICE_EN			(1 << 7)

/* DAC_SEL bit fields */
#define DA7210_DAC_L_SRC_DAI_L		(4 << 0)
#define DA7210_DAC_L_EN			(1 << 3)
#define DA7210_DAC_R_SRC_DAI_R		(5 << 4)
#define DA7210_DAC_R_EN			(1 << 7)

/* OUTMIX_L bit fields */
#define DA7210_OUT_L_EN			(1 << 7)

/* OUTMIX_R bit fields */
#define DA7210_OUT_R_EN			(1 << 7)

/* HP_CFG bit fields */
#define DA7210_HP_2CAP_MODE		(1 << 1)
#define DA7210_HP_SENSE_EN		(1 << 2)
#define DA7210_HP_L_EN			(1 << 3)
#define DA7210_HP_MODE			(1 << 6)
#define DA7210_HP_R_EN			(1 << 7)

/* DAI_SRC_SEL bit fields */
#define DA7210_DAI_OUT_L_SRC		(6 << 0)
#define DA7210_DAI_OUT_R_SRC		(7 << 4)

/* DAI_CFG1 bit fields */
#define DA7210_DAI_WORD_S16_LE		(0 << 0)
#define DA7210_DAI_WORD_S20_3LE		(1 << 0)
#define DA7210_DAI_WORD_S24_LE		(2 << 0)
#define DA7210_DAI_WORD_S32_LE		(3 << 0)
#define DA7210_DAI_FLEN_64BIT		(1 << 2)
#define DA7210_DAI_MODE_SLAVE		(0 << 7)
#define DA7210_DAI_MODE_MASTER		(1 << 7)

/* DAI_CFG3 bit fields */
#define DA7210_DAI_FORMAT_I2SMODE	(0 << 0)
#define DA7210_DAI_FORMAT_LEFT_J	(1 << 0)
#define DA7210_DAI_FORMAT_RIGHT_J	(2 << 0)
#define DA7210_DAI_OE			(1 << 3)
#define DA7210_DAI_EN			(1 << 7)

/*PLL_DIV3 bit fields */
#define DA7210_MCLK_RANGE_10_20_MHZ	(1 << 4)
#define DA7210_PLL_BYP			(1 << 6)

/* PLL bit fields */
#define DA7210_PLL_FS_MASK		(0xF << 0)
#define DA7210_PLL_FS_8000		(0x1 << 0)
#define DA7210_PLL_FS_11025		(0x2 << 0)
#define DA7210_PLL_FS_12000		(0x3 << 0)
#define DA7210_PLL_FS_16000		(0x5 << 0)
#define DA7210_PLL_FS_22050		(0x6 << 0)
#define DA7210_PLL_FS_24000		(0x7 << 0)
#define DA7210_PLL_FS_32000		(0x9 << 0)
#define DA7210_PLL_FS_44100		(0xA << 0)
#define DA7210_PLL_FS_48000		(0xB << 0)
#define DA7210_PLL_FS_88200		(0xE << 0)
#define DA7210_PLL_FS_96000		(0xF << 0)
#define DA7210_PLL_EN			(0x1 << 7)

/* SOFTMUTE bit fields */
#define DA7210_RAMP_EN			(1 << 6)

/* CONTROL bit fields */
#define DA7210_NOISE_SUP_EN		(1 << 3)

/* IN_GAIN bit fields */
#define DA7210_INPGA_L_VOL		(0x0F << 0)
#define DA7210_INPGA_R_VOL		(0xF0 << 0)

/* ZERO_CROSS bit fields */
#define DA7210_AUX1_L_ZC		(1 << 0)
#define DA7210_AUX1_R_ZC		(1 << 1)
#define DA7210_HP_L_ZC			(1 << 6)
#define DA7210_HP_R_ZC			(1 << 7)

/* AUX1_L bit fields */
#define DA7210_AUX1_L_VOL		(0x3F << 0)

/* AUX1_R bit fields */
#define DA7210_AUX1_R_VOL		(0x3F << 0)

/* Minimum INPGA and AUX1 volume to enable noise suppression */
#define DA7210_INPGA_MIN_VOL_NS		0x0A  /* 10.5dB */
#define DA7210_AUX1_MIN_VOL_NS		0x35  /* 6dB */

#define DA7210_VERSION "0.0.1"

/*
 * Playback Volume
 *
 * max		: 0x3F (+15.0 dB)
 *		   (1.5 dB step)
 * min		: 0x11 (-54.0 dB)
 * mute		: 0x10
 * reserved	: 0x00 - 0x0F
 *
 * Reserved area are considered as "mute".
 */
static const unsigned int hp_out_tlv[] = {
	TLV_DB_RANGE_HEAD(2),
	0x0, 0x10, TLV_DB_SCALE_ITEM(TLV_DB_GAIN_MUTE, 0, 1),
	/* -54 dB to +15 dB */
	0x11, 0x3f, TLV_DB_SCALE_ITEM(-5400, 150, 0),
};

static const DECLARE_TLV_DB_SCALE(eq_gain_tlv, -1050, 150, 0);
static const DECLARE_TLV_DB_SCALE(adc_eq_master_gain_tlv, -1800, 600, 1);

/* ADC and DAC high pass filter f0 value */
static const char const *da7210_hpf_cutoff_txt[] = {
	"Fs/8192*pi", "Fs/4096*pi", "Fs/2048*pi", "Fs/1024*pi"
};

static const struct soc_enum da7210_dac_hpf_cutoff =
	SOC_ENUM_SINGLE(DA7210_DAC_HPF, 0, 4, da7210_hpf_cutoff_txt);

static const struct soc_enum da7210_adc_hpf_cutoff =
	SOC_ENUM_SINGLE(DA7210_ADC_HPF, 0, 4, da7210_hpf_cutoff_txt);

/* ADC and DAC voice (8kHz) high pass cutoff value */
static const char const *da7210_vf_cutoff_txt[] = {
	"2.5Hz", "25Hz", "50Hz", "100Hz", "150Hz", "200Hz", "300Hz", "400Hz"
};

static const struct soc_enum da7210_dac_vf_cutoff =
	SOC_ENUM_SINGLE(DA7210_DAC_HPF, 4, 8, da7210_vf_cutoff_txt);

static const struct soc_enum da7210_adc_vf_cutoff =
	SOC_ENUM_SINGLE(DA7210_ADC_HPF, 4, 8, da7210_vf_cutoff_txt);

static const char *da7210_hp_mode_txt[] = {
	"Class H", "Class G"
};

static const struct soc_enum da7210_hp_mode_sel =
	SOC_ENUM_SINGLE(DA7210_HP_CFG, 0, 2, da7210_hp_mode_txt);

/* ALC can be enabled only if noise suppression is disabled */
static int da7210_put_alc_sw(struct snd_kcontrol *kcontrol,
			     struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);

	if (ucontrol->value.integer.value[0]) {
		/* Check if noise suppression is enabled */
		if (snd_soc_read(codec, DA7210_CONTROL) & DA7210_NOISE_SUP_EN) {
			dev_dbg(codec->dev,
				"Disable noise suppression to enable ALC\n");
			return -EINVAL;
		}
	}
	/* If all conditions are met or we are actually disabling ALC */
	return snd_soc_put_volsw(kcontrol, ucontrol);
}

/* Noise suppression can be enabled only if following conditions are met
 *  ALC disabled
 *  ZC enabled for HP and AUX1 PGA
 *  INPGA_L_VOL and INPGA_R_VOL >= 10.5 dB
 *  AUX1_L_VOL and AUX1_R_VOL >= 6 dB
 */
static int da7210_put_noise_sup_sw(struct snd_kcontrol *kcontrol,
				   struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	u8 val;

	if (ucontrol->value.integer.value[0]) {
		/* Check if ALC is enabled */
		if (snd_soc_read(codec, DA7210_ADC) & DA7210_ADC_ALC_EN)
			goto err;

		/* Check ZC for HP and AUX1 PGA */
		if ((snd_soc_read(codec, DA7210_ZERO_CROSS) &
			(DA7210_AUX1_L_ZC | DA7210_AUX1_R_ZC | DA7210_HP_L_ZC |
			DA7210_HP_R_ZC)) != (DA7210_AUX1_L_ZC |
			DA7210_AUX1_R_ZC | DA7210_HP_L_ZC | DA7210_HP_R_ZC))
			goto err;

		/* Check INPGA_L_VOL and INPGA_R_VOL */
		val = snd_soc_read(codec, DA7210_IN_GAIN);
		if (((val & DA7210_INPGA_L_VOL) < DA7210_INPGA_MIN_VOL_NS) ||
			(((val & DA7210_INPGA_R_VOL) >> 4) <
			DA7210_INPGA_MIN_VOL_NS))
			goto err;

		/* Check AUX1_L_VOL and AUX1_R_VOL */
		if (((snd_soc_read(codec, DA7210_AUX1_L) & DA7210_AUX1_L_VOL) <
		    DA7210_AUX1_MIN_VOL_NS) ||
		    ((snd_soc_read(codec, DA7210_AUX1_R) & DA7210_AUX1_R_VOL) <
		    DA7210_AUX1_MIN_VOL_NS))
			goto err;
	}
	/* If all conditions are met or we are actually disabling Noise sup */
	return snd_soc_put_volsw(kcontrol, ucontrol);

err:
	return -EINVAL;
}

static const struct snd_kcontrol_new da7210_snd_controls[] = {

	SOC_DOUBLE_R_TLV("HeadPhone Playback Volume",
			 DA7210_HP_L_VOL, DA7210_HP_R_VOL,
			 0, 0x3F, 0, hp_out_tlv),

	/* DAC Equalizer  controls */
	SOC_SINGLE("DAC EQ Switch", DA7210_DAC_EQ5, 7, 1, 0),
	SOC_SINGLE_TLV("DAC EQ1 Volume", DA7210_DAC_EQ1_2, 0, 0xf, 1,
		       eq_gain_tlv),
	SOC_SINGLE_TLV("DAC EQ2 Volume", DA7210_DAC_EQ1_2, 4, 0xf, 1,
		       eq_gain_tlv),
	SOC_SINGLE_TLV("DAC EQ3 Volume", DA7210_DAC_EQ3_4, 0, 0xf, 1,
		       eq_gain_tlv),
	SOC_SINGLE_TLV("DAC EQ4 Volume", DA7210_DAC_EQ3_4, 4, 0xf, 1,
		       eq_gain_tlv),
	SOC_SINGLE_TLV("DAC EQ5 Volume", DA7210_DAC_EQ5, 0, 0xf, 1,
		       eq_gain_tlv),

	/* ADC Equalizer  controls */
	SOC_SINGLE("ADC EQ Switch", DA7210_ADC_EQ5, 7, 1, 0),
	SOC_SINGLE_TLV("ADC EQ Master Volume", DA7210_ADC_EQ5, 4, 0x3,
		       1, adc_eq_master_gain_tlv),
	SOC_SINGLE_TLV("ADC EQ1 Volume", DA7210_ADC_EQ1_2, 0, 0xf, 1,
		       eq_gain_tlv),
	SOC_SINGLE_TLV("ADC EQ2 Volume", DA7210_ADC_EQ1_2, 4, 0xf, 1,
		       eq_gain_tlv),
	SOC_SINGLE_TLV("ADC EQ3 Volume", DA7210_ADC_EQ3_4, 0, 0xf, 1,
		       eq_gain_tlv),
	SOC_SINGLE_TLV("ADC EQ4 Volume", DA7210_ADC_EQ3_4, 4, 0xf, 1,
		       eq_gain_tlv),
	SOC_SINGLE_TLV("ADC EQ5 Volume", DA7210_ADC_EQ5, 0, 0xf, 1,
		       eq_gain_tlv),

	SOC_SINGLE("DAC HPF Switch", DA7210_DAC_HPF, 3, 1, 0),
	SOC_ENUM("DAC HPF Cutoff", da7210_dac_hpf_cutoff),
	SOC_SINGLE("DAC Voice Mode Switch", DA7210_DAC_HPF, 7, 1, 0),
	SOC_ENUM("DAC Voice Cutoff", da7210_dac_vf_cutoff),

	SOC_SINGLE("ADC HPF Switch", DA7210_ADC_HPF, 3, 1, 0),
	SOC_ENUM("ADC HPF Cutoff", da7210_adc_hpf_cutoff),
	SOC_SINGLE("ADC Voice Mode Switch", DA7210_ADC_HPF, 7, 1, 0),
	SOC_ENUM("ADC Voice Cutoff", da7210_adc_vf_cutoff),

	/* Mute controls */
	SOC_DOUBLE_R("Mic Capture Switch", DA7210_MIC_L, DA7210_MIC_R, 3, 1, 0),
	SOC_SINGLE("Aux2 Capture Switch", DA7210_AUX2, 2, 1, 0),
	SOC_DOUBLE("ADC Capture Switch", DA7210_ADC, 2, 6, 1, 0),
	SOC_SINGLE("Digital Soft Mute Switch", DA7210_SOFTMUTE, 7, 1, 0),
	SOC_SINGLE("Digital Soft Mute Rate", DA7210_SOFTMUTE, 0, 0x7, 0),

	/* Zero cross controls */
	SOC_DOUBLE("Aux1 ZC Switch", DA7210_ZERO_CROSS, 0, 1, 1, 0),
	SOC_DOUBLE("In PGA ZC Switch", DA7210_ZERO_CROSS, 2, 3, 1, 0),
	SOC_DOUBLE("Lineout ZC Switch", DA7210_ZERO_CROSS, 4, 5, 1, 0),
	SOC_DOUBLE("Headphone ZC Switch", DA7210_ZERO_CROSS, 6, 7, 1, 0),

	SOC_ENUM("Headphone Class", da7210_hp_mode_sel),

	/* ALC controls */
	SOC_SINGLE_EXT("ALC Enable Switch", DA7210_ADC, 0, 1, 0,
		       snd_soc_get_volsw, da7210_put_alc_sw),
	SOC_SINGLE("ALC Capture Max Volume", DA7210_ALC_MAX, 0, 0x3F, 0),
	SOC_SINGLE("ALC Capture Min Volume", DA7210_ALC_MIN, 0, 0x3F, 0),
	SOC_SINGLE("ALC Capture Noise Volume", DA7210_ALC_NOIS, 0, 0x3F, 0),
	SOC_SINGLE("ALC Capture Attack Rate", DA7210_ALC_ATT, 0, 0xFF, 0),
	SOC_SINGLE("ALC Capture Release Rate", DA7210_ALC_REL, 0, 0xFF, 0),
	SOC_SINGLE("ALC Capture Release Delay", DA7210_ALC_DEL, 0, 0xFF, 0),

	SOC_SINGLE_EXT("Noise Suppression Enable Switch", DA7210_CONTROL, 3, 1,
		       0, snd_soc_get_volsw, da7210_put_noise_sup_sw),
};

/*
 * DAPM Controls
 *
 * Current DAPM implementation covers almost all codec components e.g. IOs,
 * mixers, PGAs,ADC and DAC.
 */
/* In Mixer Left */
static const struct snd_kcontrol_new da7210_dapm_inmixl_controls[] = {
	SOC_DAPM_SINGLE("Mic Left Switch", DA7210_INMIX_L, 0, 1, 0),
	SOC_DAPM_SINGLE("Mic Right Switch", DA7210_INMIX_L, 1, 1, 0),
};

/* In Mixer Right */
static const struct snd_kcontrol_new da7210_dapm_inmixr_controls[] = {
	SOC_DAPM_SINGLE("Mic Right Switch", DA7210_INMIX_R, 0, 1, 0),
	SOC_DAPM_SINGLE("Mic Left Switch", DA7210_INMIX_R, 1, 1, 0),
};

/* Out Mixer Left */
static const struct snd_kcontrol_new da7210_dapm_outmixl_controls[] = {
	SOC_DAPM_SINGLE("DAC Left Switch", DA7210_OUTMIX_L, 4, 1, 0),
};

/* Out Mixer Right */
static const struct snd_kcontrol_new da7210_dapm_outmixr_controls[] = {
	SOC_DAPM_SINGLE("DAC Right Switch", DA7210_OUTMIX_R, 4, 1, 0),
};

/* DAPM widgets */
static const struct snd_soc_dapm_widget da7210_dapm_widgets[] = {
	/* Input Side */
	/* Input Lines */
	SND_SOC_DAPM_INPUT("MICL"),
	SND_SOC_DAPM_INPUT("MICR"),

	/* Input PGAs */
	SND_SOC_DAPM_PGA("Mic Left", DA7210_STARTUP3, 0, 1, NULL, 0),
	SND_SOC_DAPM_PGA("Mic Right", DA7210_STARTUP3, 1, 1, NULL, 0),

	SND_SOC_DAPM_PGA("INPGA Left", DA7210_INMIX_L, 7, 0, NULL, 0),
	SND_SOC_DAPM_PGA("INPGA Right", DA7210_INMIX_R, 7, 0, NULL, 0),

	/* Input Mixers */
	SND_SOC_DAPM_MIXER("In Mixer Left", SND_SOC_NOPM, 0, 0,
		&da7210_dapm_inmixl_controls[0],
		ARRAY_SIZE(da7210_dapm_inmixl_controls)),

	SND_SOC_DAPM_MIXER("In Mixer Right", SND_SOC_NOPM, 0, 0,
		&da7210_dapm_inmixr_controls[0],
		ARRAY_SIZE(da7210_dapm_inmixr_controls)),

	/* ADCs */
	SND_SOC_DAPM_ADC("ADC Left", "Capture", DA7210_STARTUP3, 5, 1),
	SND_SOC_DAPM_ADC("ADC Right", "Capture", DA7210_STARTUP3, 6, 1),

	/* Output Side */
	/* DACs */
	SND_SOC_DAPM_DAC("DAC Left", "Playback", DA7210_STARTUP2, 5, 1),
	SND_SOC_DAPM_DAC("DAC Right", "Playback", DA7210_STARTUP2, 6, 1),

	/* Output Mixers */
	SND_SOC_DAPM_MIXER("Out Mixer Left", SND_SOC_NOPM, 0, 0,
		&da7210_dapm_outmixl_controls[0],
		ARRAY_SIZE(da7210_dapm_outmixl_controls)),

	SND_SOC_DAPM_MIXER("Out Mixer Right", SND_SOC_NOPM, 0, 0,
		&da7210_dapm_outmixr_controls[0],
		ARRAY_SIZE(da7210_dapm_outmixr_controls)),

	/* Output PGAs */
	SND_SOC_DAPM_PGA("OUTPGA Left Enable", DA7210_OUTMIX_L, 7, 0, NULL, 0),
	SND_SOC_DAPM_PGA("OUTPGA Right Enable", DA7210_OUTMIX_R, 7, 0, NULL, 0),

	SND_SOC_DAPM_PGA("Headphone Left", DA7210_STARTUP2, 3, 1, NULL, 0),
	SND_SOC_DAPM_PGA("Headphone Right", DA7210_STARTUP2, 4, 1, NULL, 0),

	/* Output Lines */
	SND_SOC_DAPM_OUTPUT("HPL"),
	SND_SOC_DAPM_OUTPUT("HPR"),
};

/* DAPM audio route definition */
static const struct snd_soc_dapm_route da7210_audio_map[] = {
	/* Dest       Connecting Widget    source */
	/* Input path */
	{"Mic Left", NULL, "MICL"},
	{"Mic Right", NULL, "MICR"},

	{"In Mixer Left", "Mic Left Switch", "Mic Left"},
	{"In Mixer Left", "Mic Right Switch", "Mic Right"},

	{"In Mixer Right", "Mic Right Switch", "Mic Right"},
	{"In Mixer Right", "Mic Left Switch", "Mic Left"},

	{"INPGA Left", NULL, "In Mixer Left"},
	{"ADC Left", NULL, "INPGA Left"},

	{"INPGA Right", NULL, "In Mixer Right"},
	{"ADC Right", NULL, "INPGA Right"},

	/* Output path */
	{"Out Mixer Left", "DAC Left Switch", "DAC Left"},
	{"Out Mixer Right", "DAC Right Switch", "DAC Right"},

	{"OUTPGA Left Enable", NULL, "Out Mixer Left"},
	{"OUTPGA Right Enable", NULL, "Out Mixer Right"},

	{"Headphone Left", NULL, "OUTPGA Left Enable"},
	{"HPL", NULL, "Headphone Left"},

	{"Headphone Right", NULL, "OUTPGA Right Enable"},
	{"HPR", NULL, "Headphone Right"},
};

/* Codec private data */
struct da7210_priv {
	enum snd_soc_control_type control_type;
};

/*
 * Register cache
 */
static const u8 da7210_reg[] = {
	0x00, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	/* R0  - R7  */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08,	/* R8  - RF  */
	0x00, 0x00, 0x00, 0x00, 0x08, 0x10, 0x10, 0x54,	/* R10 - R17 */
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	/* R18 - R1F */
	0x00, 0x00, 0x00, 0x02, 0x00, 0x76, 0x00, 0x00,	/* R20 - R27 */
	0x04, 0x00, 0x00, 0x30, 0x2A, 0x00, 0x40, 0x00,	/* R28 - R2F */
	0x40, 0x00, 0x40, 0x00, 0x40, 0x00, 0x40, 0x00,	/* R30 - R37 */
	0x40, 0x00, 0x40, 0x00, 0x40, 0x00, 0x00, 0x00,	/* R38 - R3F */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	/* R40 - R4F */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	/* R48 - R4F */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	/* R50 - R57 */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	/* R58 - R5F */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	/* R60 - R67 */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	/* R68 - R6F */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,	/* R70 - R77 */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x54, 0x54, 0x00,	/* R78 - R7F */
	0x00, 0x00, 0x2C, 0x00, 0x00, 0x00, 0x00, 0x00,	/* R80 - R87 */
	0x00,						/* R88       */
};

static int da7210_volatile_register(struct snd_soc_codec *codec,
				    unsigned int reg)
{
	switch (reg) {
	case DA7210_STATUS:
		return 1;
	default:
		return 0;
	}
}

/*
 * Set PCM DAI word length.
 */
static int da7210_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;
	u32 dai_cfg1;
	u32 fs, bypass;

	/* set DAI source to Left and Right ADC */
	snd_soc_write(codec, DA7210_DAI_SRC_SEL,
		     DA7210_DAI_OUT_R_SRC | DA7210_DAI_OUT_L_SRC);

	/* Enable DAI */
	snd_soc_write(codec, DA7210_DAI_CFG3, DA7210_DAI_OE | DA7210_DAI_EN);

	dai_cfg1 = 0xFC & snd_soc_read(codec, DA7210_DAI_CFG1);

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		dai_cfg1 |= DA7210_DAI_WORD_S16_LE;
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		dai_cfg1 |= DA7210_DAI_WORD_S20_3LE;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		dai_cfg1 |= DA7210_DAI_WORD_S24_LE;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		dai_cfg1 |= DA7210_DAI_WORD_S32_LE;
		break;
	default:
		return -EINVAL;
	}

	snd_soc_write(codec, DA7210_DAI_CFG1, dai_cfg1);

	switch (params_rate(params)) {
	case 8000:
		fs		= DA7210_PLL_FS_8000;
		bypass		= DA7210_PLL_BYP;
		break;
	case 11025:
		fs		= DA7210_PLL_FS_11025;
		bypass		= 0;
		break;
	case 12000:
		fs		= DA7210_PLL_FS_12000;
		bypass		= DA7210_PLL_BYP;
		break;
	case 16000:
		fs		= DA7210_PLL_FS_16000;
		bypass		= DA7210_PLL_BYP;
		break;
	case 22050:
		fs		= DA7210_PLL_FS_22050;
		bypass		= 0;
		break;
	case 32000:
		fs		= DA7210_PLL_FS_32000;
		bypass		= DA7210_PLL_BYP;
		break;
	case 44100:
		fs		= DA7210_PLL_FS_44100;
		bypass		= 0;
		break;
	case 48000:
		fs		= DA7210_PLL_FS_48000;
		bypass		= DA7210_PLL_BYP;
		break;
	case 88200:
		fs		= DA7210_PLL_FS_88200;
		bypass		= 0;
		break;
	case 96000:
		fs		= DA7210_PLL_FS_96000;
		bypass		= DA7210_PLL_BYP;
		break;
	default:
		return -EINVAL;
	}

	/* Disable active mode */
	snd_soc_update_bits(codec, DA7210_STARTUP1, DA7210_SC_MST_EN, 0);

	snd_soc_update_bits(codec, DA7210_PLL, DA7210_PLL_FS_MASK, fs);
	snd_soc_update_bits(codec, DA7210_PLL_DIV3, DA7210_PLL_BYP, bypass);

	/* Enable active mode */
	snd_soc_update_bits(codec, DA7210_STARTUP1,
			    DA7210_SC_MST_EN, DA7210_SC_MST_EN);

	return 0;
}

/*
 * Set DAI mode and Format
 */
static int da7210_set_dai_fmt(struct snd_soc_dai *codec_dai, u32 fmt)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u32 dai_cfg1;
	u32 dai_cfg3;

	dai_cfg1 = 0x7f & snd_soc_read(codec, DA7210_DAI_CFG1);
	dai_cfg3 = 0xfc & snd_soc_read(codec, DA7210_DAI_CFG3);

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		dai_cfg1 |= DA7210_DAI_MODE_MASTER;
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
		dai_cfg1 |= DA7210_DAI_MODE_SLAVE;
		break;
	default:
		return -EINVAL;
	}

	/* FIXME
	 *
	 * It support I2S only now
	 */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		dai_cfg3 |= DA7210_DAI_FORMAT_I2SMODE;
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		dai_cfg3 |= DA7210_DAI_FORMAT_LEFT_J;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		dai_cfg3 |= DA7210_DAI_FORMAT_RIGHT_J;
		break;
	default:
		return -EINVAL;
	}

	/* FIXME
	 *
	 * It support 64bit data transmission only now
	 */
	dai_cfg1 |= DA7210_DAI_FLEN_64BIT;

	snd_soc_write(codec, DA7210_DAI_CFG1, dai_cfg1);
	snd_soc_write(codec, DA7210_DAI_CFG3, dai_cfg3);

	return 0;
}

static int da7210_mute(struct snd_soc_dai *dai, int mute)
{
	struct snd_soc_codec *codec = dai->codec;
	u8 mute_reg = snd_soc_read(codec, DA7210_DAC_HPF) & 0xFB;

	if (mute)
		snd_soc_write(codec, DA7210_DAC_HPF, mute_reg | 0x4);
	else
		snd_soc_write(codec, DA7210_DAC_HPF, mute_reg);
	return 0;
}

#define DA7210_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)

/* DAI operations */
static struct snd_soc_dai_ops da7210_dai_ops = {
	.hw_params	= da7210_hw_params,
	.set_fmt	= da7210_set_dai_fmt,
	.digital_mute	= da7210_mute,
};

static struct snd_soc_dai_driver da7210_dai = {
	.name = "da7210-hifi",
	/* playback capabilities */
	.playback = {
		.stream_name = "Playback",
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_96000,
		.formats = DA7210_FORMATS,
	},
	/* capture capabilities */
	.capture = {
		.stream_name = "Capture",
		.channels_min = 1,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_96000,
		.formats = DA7210_FORMATS,
	},
	.ops = &da7210_dai_ops,
	.symmetric_rates = 1,
};

static int da7210_probe(struct snd_soc_codec *codec)
{
	struct da7210_priv *da7210 = snd_soc_codec_get_drvdata(codec);
	int ret;

	dev_info(codec->dev, "DA7210 Audio Codec %s\n", DA7210_VERSION);

	ret = snd_soc_codec_set_cache_io(codec, 8, 8, da7210->control_type);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
		return ret;
	}

	/* FIXME
	 *
	 * This driver use fixed value here
	 * And below settings expects MCLK = 12.288MHz
	 *
	 * When you select different MCLK, please check...
	 *      DA7210_PLL_DIV1 val
	 *      DA7210_PLL_DIV2 val
	 *      DA7210_PLL_DIV3 val
	 *      DA7210_PLL_DIV3 :: DA7210_MCLK_RANGExxx
	 */

	/*
	 * make sure that DA7210 use bypass mode before start up
	 */
	snd_soc_write(codec, DA7210_STARTUP1, 0);
	snd_soc_write(codec, DA7210_PLL_DIV3,
		     DA7210_MCLK_RANGE_10_20_MHZ | DA7210_PLL_BYP);

	/*
	 * ADC settings
	 */

	/* Enable Left & Right MIC PGA and Mic Bias */
	snd_soc_write(codec, DA7210_MIC_L, DA7210_MIC_L_EN | DA7210_MICBIAS_EN);
	snd_soc_write(codec, DA7210_MIC_R, DA7210_MIC_R_EN);

	/* Enable Left and Right input PGA */
	snd_soc_write(codec, DA7210_INMIX_L, DA7210_IN_L_EN);
	snd_soc_write(codec, DA7210_INMIX_R, DA7210_IN_R_EN);

	/* Enable Left and Right ADC */
	snd_soc_write(codec, DA7210_ADC, DA7210_ADC_L_EN | DA7210_ADC_R_EN);

	/*
	 * DAC settings
	 */

	/* Enable Left and Right DAC */
	snd_soc_write(codec, DA7210_DAC_SEL,
		     DA7210_DAC_L_SRC_DAI_L | DA7210_DAC_L_EN |
		     DA7210_DAC_R_SRC_DAI_R | DA7210_DAC_R_EN);

	/* Enable Left and Right out PGA */
	snd_soc_write(codec, DA7210_OUTMIX_L, DA7210_OUT_L_EN);
	snd_soc_write(codec, DA7210_OUTMIX_R, DA7210_OUT_R_EN);

	/* Enable Left and Right HeadPhone PGA */
	snd_soc_write(codec, DA7210_HP_CFG,
		     DA7210_HP_2CAP_MODE | DA7210_HP_SENSE_EN |
		     DA7210_HP_L_EN | DA7210_HP_MODE | DA7210_HP_R_EN);

	/* Enable ramp mode for DAC gain update */
	snd_soc_write(codec, DA7210_SOFTMUTE, DA7210_RAMP_EN);

	/* Diable PLL and bypass it */
	snd_soc_write(codec, DA7210_PLL, DA7210_PLL_FS_48000);

	/*
	 * If 48kHz sound came, it use bypass mode,
	 * and when it is 44.1kHz, it use PLL.
	 *
	 * This time, this driver sets PLL always ON
	 * and controls bypass/PLL mode by switching
	 * DA7210_PLL_DIV3 :: DA7210_PLL_BYP bit.
	 *   see da7210_hw_params
	 */
	snd_soc_write(codec, DA7210_PLL_DIV1, 0xE5); /* MCLK = 12.288MHz */
	snd_soc_write(codec, DA7210_PLL_DIV2, 0x99);
	snd_soc_write(codec, DA7210_PLL_DIV3, 0x0A |
		     DA7210_MCLK_RANGE_10_20_MHZ | DA7210_PLL_BYP);
	snd_soc_update_bits(codec, DA7210_PLL, DA7210_PLL_EN, DA7210_PLL_EN);

	/* As suggested by Dialog */
	snd_soc_write(codec, DA7210_A_HID_UNLOCK,	0x8B); /* unlock */
	snd_soc_write(codec, DA7210_A_TEST_UNLOCK,	0xB4);
	snd_soc_write(codec, DA7210_A_PLL1,		0x01);
	snd_soc_write(codec, DA7210_A_CP_MODE,		0x7C);
	snd_soc_write(codec, DA7210_A_HID_UNLOCK,	0x00); /* re-lock */
	snd_soc_write(codec, DA7210_A_TEST_UNLOCK,	0x00);

	/* Activate all enabled subsystem */
	snd_soc_write(codec, DA7210_STARTUP1, DA7210_SC_MST_EN);

	dev_info(codec->dev, "DA7210 Audio Codec %s\n", DA7210_VERSION);

	return 0;
}

static struct snd_soc_codec_driver soc_codec_dev_da7210 = {
	.probe			= da7210_probe,
	.reg_cache_size		= ARRAY_SIZE(da7210_reg),
	.reg_word_size		= sizeof(u8),
	.reg_cache_default	= da7210_reg,
	.volatile_register	= da7210_volatile_register,

	.controls		= da7210_snd_controls,
	.num_controls		= ARRAY_SIZE(da7210_snd_controls),

	.dapm_widgets		= da7210_dapm_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(da7210_dapm_widgets),
	.dapm_routes		= da7210_audio_map,
	.num_dapm_routes	= ARRAY_SIZE(da7210_audio_map),
};

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static int __devinit da7210_i2c_probe(struct i2c_client *i2c,
			   	      const struct i2c_device_id *id)
{
	struct da7210_priv *da7210;
	int ret;

	da7210 = kzalloc(sizeof(struct da7210_priv), GFP_KERNEL);
	if (!da7210)
		return -ENOMEM;

	i2c_set_clientdata(i2c, da7210);
	da7210->control_type = SND_SOC_I2C;

	ret =  snd_soc_register_codec(&i2c->dev,
			&soc_codec_dev_da7210, &da7210_dai, 1);
	if (ret < 0)
		kfree(da7210);

	return ret;
}

static int __devexit da7210_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 da7210_i2c_id[] = {
	{ "da7210", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, da7210_i2c_id);

/* I2C codec control layer */
static struct i2c_driver da7210_i2c_driver = {
	.driver = {
		.name = "da7210-codec",
		.owner = THIS_MODULE,
	},
	.probe		= da7210_i2c_probe,
	.remove		= __devexit_p(da7210_i2c_remove),
	.id_table	= da7210_i2c_id,
};
#endif

static int __init da7210_modinit(void)
{
	int ret = 0;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	ret = i2c_add_driver(&da7210_i2c_driver);
#endif
	return ret;
}
module_init(da7210_modinit);

static void __exit da7210_exit(void)
{
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	i2c_del_driver(&da7210_i2c_driver);
#endif
}
module_exit(da7210_exit);

MODULE_DESCRIPTION("ASoC DA7210 driver");
MODULE_AUTHOR("David Chen, Kuninori Morimoto");
MODULE_LICENSE("GPL");