// SPDX-License-Identifier: GPL-2.0
//
// nau8822.c  --  NAU8822 ALSA Soc Audio driver
//
// Copyright 2017 Nuvoton Technology Crop.
//
// Author: David Lin <ctlin0@nuvoton.com>
// Co-author: John Hsu <kchsu0@nuvoton.com>
// Co-author: Seven Li <wtli@nuvoton.com>
//
// Based on WM8974.c

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/regmap.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 <sound/tlv.h>
#include <asm/div64.h>
#include "nau8822.h"

#define NAU_PLL_FREQ_MAX 100000000
#define NAU_PLL_FREQ_MIN 90000000
#define NAU_PLL_REF_MAX 33000000
#define NAU_PLL_REF_MIN 8000000
#define NAU_PLL_OPTOP_MIN 6

static const int nau8822_mclk_scaler[] = { 10, 15, 20, 30, 40, 60, 80, 120 };

static const struct reg_default nau8822_reg_defaults[] = {
	{ NAU8822_REG_POWER_MANAGEMENT_1, 0x0000 },
	{ NAU8822_REG_POWER_MANAGEMENT_2, 0x0000 },
	{ NAU8822_REG_POWER_MANAGEMENT_3, 0x0000 },
	{ NAU8822_REG_AUDIO_INTERFACE, 0x0050 },
	{ NAU8822_REG_COMPANDING_CONTROL, 0x0000 },
	{ NAU8822_REG_CLOCKING, 0x0140 },
	{ NAU8822_REG_ADDITIONAL_CONTROL, 0x0000 },
	{ NAU8822_REG_GPIO_CONTROL, 0x0000 },
	{ NAU8822_REG_JACK_DETECT_CONTROL_1, 0x0000 },
	{ NAU8822_REG_DAC_CONTROL, 0x0000 },
	{ NAU8822_REG_LEFT_DAC_DIGITAL_VOLUME, 0x00ff },
	{ NAU8822_REG_RIGHT_DAC_DIGITAL_VOLUME, 0x00ff },
	{ NAU8822_REG_JACK_DETECT_CONTROL_2, 0x0000 },
	{ NAU8822_REG_ADC_CONTROL, 0x0100 },
	{ NAU8822_REG_LEFT_ADC_DIGITAL_VOLUME, 0x00ff },
	{ NAU8822_REG_RIGHT_ADC_DIGITAL_VOLUME, 0x00ff },
	{ NAU8822_REG_EQ1, 0x012c },
	{ NAU8822_REG_EQ2, 0x002c },
	{ NAU8822_REG_EQ3, 0x002c },
	{ NAU8822_REG_EQ4, 0x002c },
	{ NAU8822_REG_EQ5, 0x002c },
	{ NAU8822_REG_DAC_LIMITER_1, 0x0032 },
	{ NAU8822_REG_DAC_LIMITER_2, 0x0000 },
	{ NAU8822_REG_NOTCH_FILTER_1, 0x0000 },
	{ NAU8822_REG_NOTCH_FILTER_2, 0x0000 },
	{ NAU8822_REG_NOTCH_FILTER_3, 0x0000 },
	{ NAU8822_REG_NOTCH_FILTER_4, 0x0000 },
	{ NAU8822_REG_ALC_CONTROL_1, 0x0038 },
	{ NAU8822_REG_ALC_CONTROL_2, 0x000b },
	{ NAU8822_REG_ALC_CONTROL_3, 0x0032 },
	{ NAU8822_REG_NOISE_GATE, 0x0010 },
	{ NAU8822_REG_PLL_N, 0x0008 },
	{ NAU8822_REG_PLL_K1, 0x000c },
	{ NAU8822_REG_PLL_K2, 0x0093 },
	{ NAU8822_REG_PLL_K3, 0x00e9 },
	{ NAU8822_REG_3D_CONTROL, 0x0000 },
	{ NAU8822_REG_RIGHT_SPEAKER_CONTROL, 0x0000 },
	{ NAU8822_REG_INPUT_CONTROL, 0x0033 },
	{ NAU8822_REG_LEFT_INP_PGA_CONTROL, 0x0010 },
	{ NAU8822_REG_RIGHT_INP_PGA_CONTROL, 0x0010 },
	{ NAU8822_REG_LEFT_ADC_BOOST_CONTROL, 0x0100 },
	{ NAU8822_REG_RIGHT_ADC_BOOST_CONTROL, 0x0100 },
	{ NAU8822_REG_OUTPUT_CONTROL, 0x0002 },
	{ NAU8822_REG_LEFT_MIXER_CONTROL, 0x0001 },
	{ NAU8822_REG_RIGHT_MIXER_CONTROL, 0x0001 },
	{ NAU8822_REG_LHP_VOLUME, 0x0039 },
	{ NAU8822_REG_RHP_VOLUME, 0x0039 },
	{ NAU8822_REG_LSPKOUT_VOLUME, 0x0039 },
	{ NAU8822_REG_RSPKOUT_VOLUME, 0x0039 },
	{ NAU8822_REG_AUX2_MIXER, 0x0001 },
	{ NAU8822_REG_AUX1_MIXER, 0x0001 },
	{ NAU8822_REG_POWER_MANAGEMENT_4, 0x0000 },
	{ NAU8822_REG_LEFT_TIME_SLOT, 0x0000 },
	{ NAU8822_REG_MISC, 0x0020 },
	{ NAU8822_REG_RIGHT_TIME_SLOT, 0x0000 },
	{ NAU8822_REG_DEVICE_REVISION, 0x007f },
	{ NAU8822_REG_DEVICE_ID, 0x001a },
	{ NAU8822_REG_DAC_DITHER, 0x0114 },
	{ NAU8822_REG_ALC_ENHANCE_1, 0x0000 },
	{ NAU8822_REG_ALC_ENHANCE_2, 0x0000 },
	{ NAU8822_REG_192KHZ_SAMPLING, 0x0008 },
	{ NAU8822_REG_MISC_CONTROL, 0x0000 },
	{ NAU8822_REG_INPUT_TIEOFF, 0x0000 },
	{ NAU8822_REG_POWER_REDUCTION, 0x0000 },
	{ NAU8822_REG_AGC_PEAK2PEAK, 0x0000 },
	{ NAU8822_REG_AGC_PEAK_DETECT, 0x0000 },
	{ NAU8822_REG_AUTOMUTE_CONTROL, 0x0000 },
	{ NAU8822_REG_OUTPUT_TIEOFF, 0x0000 },
};

static bool nau8822_readable_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case NAU8822_REG_RESET ... NAU8822_REG_JACK_DETECT_CONTROL_1:
	case NAU8822_REG_DAC_CONTROL ... NAU8822_REG_LEFT_ADC_DIGITAL_VOLUME:
	case NAU8822_REG_RIGHT_ADC_DIGITAL_VOLUME:
	case NAU8822_REG_EQ1 ... NAU8822_REG_EQ5:
	case NAU8822_REG_DAC_LIMITER_1 ... NAU8822_REG_DAC_LIMITER_2:
	case NAU8822_REG_NOTCH_FILTER_1 ... NAU8822_REG_NOTCH_FILTER_4:
	case NAU8822_REG_ALC_CONTROL_1 ...NAU8822_REG_PLL_K3:
	case NAU8822_REG_3D_CONTROL:
	case NAU8822_REG_RIGHT_SPEAKER_CONTROL:
	case NAU8822_REG_INPUT_CONTROL ... NAU8822_REG_LEFT_ADC_BOOST_CONTROL:
	case NAU8822_REG_RIGHT_ADC_BOOST_CONTROL ... NAU8822_REG_AUX1_MIXER:
	case NAU8822_REG_POWER_MANAGEMENT_4 ... NAU8822_REG_DEVICE_ID:
	case NAU8822_REG_DAC_DITHER:
	case NAU8822_REG_ALC_ENHANCE_1 ... NAU8822_REG_MISC_CONTROL:
	case NAU8822_REG_INPUT_TIEOFF ... NAU8822_REG_OUTPUT_TIEOFF:
		return true;
	default:
		return false;
	}
}

static bool nau8822_writeable_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case NAU8822_REG_RESET ... NAU8822_REG_JACK_DETECT_CONTROL_1:
	case NAU8822_REG_DAC_CONTROL ... NAU8822_REG_LEFT_ADC_DIGITAL_VOLUME:
	case NAU8822_REG_RIGHT_ADC_DIGITAL_VOLUME:
	case NAU8822_REG_EQ1 ... NAU8822_REG_EQ5:
	case NAU8822_REG_DAC_LIMITER_1 ... NAU8822_REG_DAC_LIMITER_2:
	case NAU8822_REG_NOTCH_FILTER_1 ... NAU8822_REG_NOTCH_FILTER_4:
	case NAU8822_REG_ALC_CONTROL_1 ...NAU8822_REG_PLL_K3:
	case NAU8822_REG_3D_CONTROL:
	case NAU8822_REG_RIGHT_SPEAKER_CONTROL:
	case NAU8822_REG_INPUT_CONTROL ... NAU8822_REG_LEFT_ADC_BOOST_CONTROL:
	case NAU8822_REG_RIGHT_ADC_BOOST_CONTROL ... NAU8822_REG_AUX1_MIXER:
	case NAU8822_REG_POWER_MANAGEMENT_4 ... NAU8822_REG_DEVICE_ID:
	case NAU8822_REG_DAC_DITHER:
	case NAU8822_REG_ALC_ENHANCE_1 ... NAU8822_REG_MISC_CONTROL:
	case NAU8822_REG_INPUT_TIEOFF ... NAU8822_REG_OUTPUT_TIEOFF:
		return true;
	default:
		return false;
	}
}

static bool nau8822_volatile(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case NAU8822_REG_RESET:
	case NAU8822_REG_DEVICE_REVISION:
	case NAU8822_REG_DEVICE_ID:
	case NAU8822_REG_AGC_PEAK2PEAK:
	case NAU8822_REG_AGC_PEAK_DETECT:
	case NAU8822_REG_AUTOMUTE_CONTROL:
		return true;
	default:
		return false;
	}
}

/* The EQ parameters get function is to get the 5 band equalizer control.
 * The regmap raw read can't work here because regmap doesn't provide
 * value format for value width of 9 bits. Therefore, the driver reads data
 * from cache and makes value format according to the endianness of
 * bytes type control element.
 */
static int nau8822_eq_get(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *component =
			snd_soc_kcontrol_component(kcontrol);
	struct soc_bytes_ext *params = (void *)kcontrol->private_value;
	int i, reg;
	u16 reg_val, *val;

	val = (u16 *)ucontrol->value.bytes.data;
	reg = NAU8822_REG_EQ1;
	for (i = 0; i < params->max / sizeof(u16); i++) {
		reg_val = snd_soc_component_read(component, reg + i);
		/* conversion of 16-bit integers between native CPU format
		 * and big endian format
		 */
		reg_val = cpu_to_be16(reg_val);
		memcpy(val + i, &reg_val, sizeof(reg_val));
	}

	return 0;
}

/* The EQ parameters put function is to make configuration of 5 band equalizer
 * control. These configuration includes central frequency, equalizer gain,
 * cut-off frequency, bandwidth control, and equalizer path.
 * The regmap raw write can't work here because regmap doesn't provide
 * register and value format for register with address 7 bits and value 9 bits.
 * Therefore, the driver makes value format according to the endianness of
 * bytes type control element and writes data to codec.
 */
static int nau8822_eq_put(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *component =
			snd_soc_kcontrol_component(kcontrol);
	struct soc_bytes_ext *params = (void *)kcontrol->private_value;
	void *data;
	u16 *val, value;
	int i, reg, ret;

	data = kmemdup(ucontrol->value.bytes.data,
		params->max, GFP_KERNEL | GFP_DMA);
	if (!data)
		return -ENOMEM;

	val = (u16 *)data;
	reg = NAU8822_REG_EQ1;
	for (i = 0; i < params->max / sizeof(u16); i++) {
		/* conversion of 16-bit integers between native CPU format
		 * and big endian format
		 */
		value = be16_to_cpu(*(val + i));
		ret = snd_soc_component_write(component, reg + i, value);
		if (ret) {
			dev_err(component->dev,
			    "EQ configuration fail, register: %x ret: %d\n",
			    reg + i, ret);
			kfree(data);
			return ret;
		}
	}
	kfree(data);

	return 0;
}

static const char * const nau8822_companding[] = {
	"Off", "NC", "u-law", "A-law"};

static const struct soc_enum nau8822_companding_adc_enum =
	SOC_ENUM_SINGLE(NAU8822_REG_COMPANDING_CONTROL, NAU8822_ADCCM_SFT,
		ARRAY_SIZE(nau8822_companding), nau8822_companding);

static const struct soc_enum nau8822_companding_dac_enum =
	SOC_ENUM_SINGLE(NAU8822_REG_COMPANDING_CONTROL, NAU8822_DACCM_SFT,
		ARRAY_SIZE(nau8822_companding), nau8822_companding);

static const char * const nau8822_eqmode[] = {"Capture", "Playback"};

static const struct soc_enum nau8822_eqmode_enum =
	SOC_ENUM_SINGLE(NAU8822_REG_EQ1, NAU8822_EQM_SFT,
		ARRAY_SIZE(nau8822_eqmode), nau8822_eqmode);

static const char * const nau8822_alc1[] = {"Off", "Right", "Left", "Both"};
static const char * const nau8822_alc3[] = {"Normal", "Limiter"};

static const struct soc_enum nau8822_alc_enable_enum =
	SOC_ENUM_SINGLE(NAU8822_REG_ALC_CONTROL_1, NAU8822_ALCEN_SFT,
		ARRAY_SIZE(nau8822_alc1), nau8822_alc1);

static const struct soc_enum nau8822_alc_mode_enum =
	SOC_ENUM_SINGLE(NAU8822_REG_ALC_CONTROL_3, NAU8822_ALCM_SFT,
		ARRAY_SIZE(nau8822_alc3), nau8822_alc3);

static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
static const DECLARE_TLV_DB_SCALE(pga_boost_tlv, 0, 2000, 0);
static const DECLARE_TLV_DB_SCALE(boost_tlv, -1500, 300, 1);
static const DECLARE_TLV_DB_SCALE(limiter_tlv, 0, 100, 0);

static const struct snd_kcontrol_new nau8822_snd_controls[] = {
	SOC_ENUM("ADC Companding", nau8822_companding_adc_enum),
	SOC_ENUM("DAC Companding", nau8822_companding_dac_enum),

	SOC_ENUM("EQ Function", nau8822_eqmode_enum),
	SND_SOC_BYTES_EXT("EQ Parameters", 10,
		  nau8822_eq_get, nau8822_eq_put),

	SOC_DOUBLE("DAC Inversion Switch",
		NAU8822_REG_DAC_CONTROL, 0, 1, 1, 0),
	SOC_DOUBLE_R_TLV("PCM Volume",
		NAU8822_REG_LEFT_DAC_DIGITAL_VOLUME,
		NAU8822_REG_RIGHT_DAC_DIGITAL_VOLUME, 0, 255, 0, digital_tlv),

	SOC_SINGLE("High Pass Filter Switch",
		NAU8822_REG_ADC_CONTROL, 8, 1, 0),
	SOC_SINGLE("High Pass Cut Off",
		NAU8822_REG_ADC_CONTROL, 4, 7, 0),

	SOC_DOUBLE("ADC Inversion Switch",
		NAU8822_REG_ADC_CONTROL, 0, 1, 1, 0),
	SOC_DOUBLE_R_TLV("ADC Volume",
		NAU8822_REG_LEFT_ADC_DIGITAL_VOLUME,
		NAU8822_REG_RIGHT_ADC_DIGITAL_VOLUME, 0, 255, 0, digital_tlv),

	SOC_SINGLE("DAC Limiter Switch",
		NAU8822_REG_DAC_LIMITER_1, 8, 1, 0),
	SOC_SINGLE("DAC Limiter Decay",
		NAU8822_REG_DAC_LIMITER_1, 4, 15, 0),
	SOC_SINGLE("DAC Limiter Attack",
		NAU8822_REG_DAC_LIMITER_1, 0, 15, 0),
	SOC_SINGLE("DAC Limiter Threshold",
		NAU8822_REG_DAC_LIMITER_2, 4, 7, 0),
	SOC_SINGLE_TLV("DAC Limiter Volume",
		NAU8822_REG_DAC_LIMITER_2, 0, 12, 0, limiter_tlv),

	SOC_ENUM("ALC Mode", nau8822_alc_mode_enum),
	SOC_ENUM("ALC Enable Switch", nau8822_alc_enable_enum),
	SOC_SINGLE("ALC Min Gain",
		NAU8822_REG_ALC_CONTROL_1, 0, 7, 0),
	SOC_SINGLE("ALC Max Gain",
		NAU8822_REG_ALC_CONTROL_1, 3, 7, 0),
	SOC_SINGLE("ALC Hold",
		NAU8822_REG_ALC_CONTROL_2, 4, 10, 0),
	SOC_SINGLE("ALC Target",
		NAU8822_REG_ALC_CONTROL_2, 0, 15, 0),
	SOC_SINGLE("ALC Decay",
		NAU8822_REG_ALC_CONTROL_3, 4, 10, 0),
	SOC_SINGLE("ALC Attack",
		NAU8822_REG_ALC_CONTROL_3, 0, 10, 0),
	SOC_SINGLE("ALC Noise Gate Switch",
		NAU8822_REG_NOISE_GATE, 3, 1, 0),
	SOC_SINGLE("ALC Noise Gate Threshold",
		NAU8822_REG_NOISE_GATE, 0, 7, 0),

	SOC_DOUBLE_R("PGA ZC Switch",
		NAU8822_REG_LEFT_INP_PGA_CONTROL,
		NAU8822_REG_RIGHT_INP_PGA_CONTROL,
		7, 1, 0),
	SOC_DOUBLE_R_TLV("PGA Volume",
		NAU8822_REG_LEFT_INP_PGA_CONTROL,
		NAU8822_REG_RIGHT_INP_PGA_CONTROL, 0, 63, 0, inpga_tlv),

	SOC_DOUBLE_R("Headphone ZC Switch",
		NAU8822_REG_LHP_VOLUME,
		NAU8822_REG_RHP_VOLUME, 7, 1, 0),
	SOC_DOUBLE_R("Headphone Playback Switch",
		NAU8822_REG_LHP_VOLUME,
		NAU8822_REG_RHP_VOLUME, 6, 1, 1),
	SOC_DOUBLE_R_TLV("Headphone Volume",
		NAU8822_REG_LHP_VOLUME,
		NAU8822_REG_RHP_VOLUME,	0, 63, 0, spk_tlv),

	SOC_DOUBLE_R("Speaker ZC Switch",
		NAU8822_REG_LSPKOUT_VOLUME,
		NAU8822_REG_RSPKOUT_VOLUME, 7, 1, 0),
	SOC_DOUBLE_R("Speaker Playback Switch",
		NAU8822_REG_LSPKOUT_VOLUME,
		NAU8822_REG_RSPKOUT_VOLUME, 6, 1, 1),
	SOC_DOUBLE_R_TLV("Speaker Volume",
		NAU8822_REG_LSPKOUT_VOLUME,
		NAU8822_REG_RSPKOUT_VOLUME, 0, 63, 0, spk_tlv),

	SOC_DOUBLE_R("AUXOUT Playback Switch",
		NAU8822_REG_AUX2_MIXER,
		NAU8822_REG_AUX1_MIXER, 6, 1, 1),

	SOC_DOUBLE_R_TLV("PGA Boost Volume",
		NAU8822_REG_LEFT_ADC_BOOST_CONTROL,
		NAU8822_REG_RIGHT_ADC_BOOST_CONTROL, 8, 1, 0, pga_boost_tlv),
	SOC_DOUBLE_R_TLV("L2/R2 Boost Volume",
		NAU8822_REG_LEFT_ADC_BOOST_CONTROL,
		NAU8822_REG_RIGHT_ADC_BOOST_CONTROL, 4, 7, 0, boost_tlv),
	SOC_DOUBLE_R_TLV("Aux Boost Volume",
		NAU8822_REG_LEFT_ADC_BOOST_CONTROL,
		NAU8822_REG_RIGHT_ADC_BOOST_CONTROL, 0, 7, 0, boost_tlv),

	SOC_SINGLE("DAC 128x Oversampling Switch",
		NAU8822_REG_DAC_CONTROL, 5, 1, 0),
	SOC_SINGLE("ADC 128x Oversampling Switch",
		NAU8822_REG_ADC_CONTROL, 5, 1, 0),
};

/* LMAIN and RMAIN Mixer */
static const struct snd_kcontrol_new nau8822_left_out_mixer[] = {
	SOC_DAPM_SINGLE("LINMIX Switch",
		NAU8822_REG_LEFT_MIXER_CONTROL, 1, 1, 0),
	SOC_DAPM_SINGLE("LAUX Switch",
		NAU8822_REG_LEFT_MIXER_CONTROL, 5, 1, 0),
	SOC_DAPM_SINGLE("LDAC Switch",
		NAU8822_REG_LEFT_MIXER_CONTROL, 0, 1, 0),
	SOC_DAPM_SINGLE("RDAC Switch",
		NAU8822_REG_OUTPUT_CONTROL, 5, 1, 0),
};

static const struct snd_kcontrol_new nau8822_right_out_mixer[] = {
	SOC_DAPM_SINGLE("RINMIX Switch",
		NAU8822_REG_RIGHT_MIXER_CONTROL, 1, 1, 0),
	SOC_DAPM_SINGLE("RAUX Switch",
		NAU8822_REG_RIGHT_MIXER_CONTROL, 5, 1, 0),
	SOC_DAPM_SINGLE("RDAC Switch",
		NAU8822_REG_RIGHT_MIXER_CONTROL, 0, 1, 0),
	SOC_DAPM_SINGLE("LDAC Switch",
		NAU8822_REG_OUTPUT_CONTROL, 6, 1, 0),
};

/* AUX1 and AUX2 Mixer */
static const struct snd_kcontrol_new nau8822_auxout1_mixer[] = {
	SOC_DAPM_SINGLE("RDAC Switch", NAU8822_REG_AUX1_MIXER, 0, 1, 0),
	SOC_DAPM_SINGLE("RMIX Switch", NAU8822_REG_AUX1_MIXER, 1, 1, 0),
	SOC_DAPM_SINGLE("RINMIX Switch", NAU8822_REG_AUX1_MIXER, 2, 1, 0),
	SOC_DAPM_SINGLE("LDAC Switch", NAU8822_REG_AUX1_MIXER, 3, 1, 0),
	SOC_DAPM_SINGLE("LMIX Switch", NAU8822_REG_AUX1_MIXER, 4, 1, 0),
};

static const struct snd_kcontrol_new nau8822_auxout2_mixer[] = {
	SOC_DAPM_SINGLE("LDAC Switch", NAU8822_REG_AUX2_MIXER, 0, 1, 0),
	SOC_DAPM_SINGLE("LMIX Switch", NAU8822_REG_AUX2_MIXER, 1, 1, 0),
	SOC_DAPM_SINGLE("LINMIX Switch", NAU8822_REG_AUX2_MIXER, 2, 1, 0),
	SOC_DAPM_SINGLE("AUX1MIX Output Switch",
		NAU8822_REG_AUX2_MIXER, 3, 1, 0),
};

/* Input PGA */
static const struct snd_kcontrol_new nau8822_left_input_mixer[] = {
	SOC_DAPM_SINGLE("L2 Switch", NAU8822_REG_INPUT_CONTROL, 2, 1, 0),
	SOC_DAPM_SINGLE("MicN Switch", NAU8822_REG_INPUT_CONTROL, 1, 1, 0),
	SOC_DAPM_SINGLE("MicP Switch", NAU8822_REG_INPUT_CONTROL, 0, 1, 0),
};
static const struct snd_kcontrol_new nau8822_right_input_mixer[] = {
	SOC_DAPM_SINGLE("R2 Switch", NAU8822_REG_INPUT_CONTROL, 6, 1, 0),
	SOC_DAPM_SINGLE("MicN Switch", NAU8822_REG_INPUT_CONTROL, 5, 1, 0),
	SOC_DAPM_SINGLE("MicP Switch", NAU8822_REG_INPUT_CONTROL, 4, 1, 0),
};

/* Loopback Switch */
static const struct snd_kcontrol_new nau8822_loopback =
	SOC_DAPM_SINGLE("Switch", NAU8822_REG_COMPANDING_CONTROL,
		NAU8822_ADDAP_SFT, 1, 0);

static int check_mclk_select_pll(struct snd_soc_dapm_widget *source,
			 struct snd_soc_dapm_widget *sink)
{
	struct snd_soc_component *component =
		snd_soc_dapm_to_component(source->dapm);
	unsigned int value;

	value = snd_soc_component_read(component, NAU8822_REG_CLOCKING);

	return (value & NAU8822_CLKM_MASK);
}

static const struct snd_soc_dapm_widget nau8822_dapm_widgets[] = {
	SND_SOC_DAPM_DAC("Left DAC", "Left HiFi Playback",
		NAU8822_REG_POWER_MANAGEMENT_3, 0, 0),
	SND_SOC_DAPM_DAC("Right DAC", "Right HiFi Playback",
		NAU8822_REG_POWER_MANAGEMENT_3, 1, 0),
	SND_SOC_DAPM_ADC("Left ADC", "Left HiFi Capture",
		NAU8822_REG_POWER_MANAGEMENT_2, 0, 0),
	SND_SOC_DAPM_ADC("Right ADC", "Right HiFi Capture",
		NAU8822_REG_POWER_MANAGEMENT_2, 1, 0),

	SOC_MIXER_ARRAY("Left Output Mixer",
		NAU8822_REG_POWER_MANAGEMENT_3, 2, 0, nau8822_left_out_mixer),
	SOC_MIXER_ARRAY("Right Output Mixer",
		NAU8822_REG_POWER_MANAGEMENT_3,	3, 0, nau8822_right_out_mixer),
	SOC_MIXER_ARRAY("AUX1 Output Mixer",
		NAU8822_REG_POWER_MANAGEMENT_1, 7, 0, nau8822_auxout1_mixer),
	SOC_MIXER_ARRAY("AUX2 Output Mixer",
		NAU8822_REG_POWER_MANAGEMENT_1,	6, 0, nau8822_auxout2_mixer),

	SOC_MIXER_ARRAY("Left Input Mixer",
		NAU8822_REG_POWER_MANAGEMENT_2,
		2, 0, nau8822_left_input_mixer),
	SOC_MIXER_ARRAY("Right Input Mixer",
		NAU8822_REG_POWER_MANAGEMENT_2,
		3, 0, nau8822_right_input_mixer),

	SND_SOC_DAPM_PGA("Left Boost Mixer",
		NAU8822_REG_POWER_MANAGEMENT_2, 4, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Right Boost Mixer",
		NAU8822_REG_POWER_MANAGEMENT_2, 5, 0, NULL, 0),

	SND_SOC_DAPM_PGA("Left Capture PGA",
		NAU8822_REG_LEFT_INP_PGA_CONTROL, 6, 1, NULL, 0),
	SND_SOC_DAPM_PGA("Right Capture PGA",
		NAU8822_REG_RIGHT_INP_PGA_CONTROL, 6, 1, NULL, 0),

	SND_SOC_DAPM_PGA("Left Headphone Out",
		NAU8822_REG_POWER_MANAGEMENT_2, 7, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Right Headphone Out",
		NAU8822_REG_POWER_MANAGEMENT_2, 8, 0, NULL, 0),

	SND_SOC_DAPM_PGA("Left Speaker Out",
		 NAU8822_REG_POWER_MANAGEMENT_3, 6, 0, NULL, 0),
	SND_SOC_DAPM_PGA("Right Speaker Out",
		NAU8822_REG_POWER_MANAGEMENT_3,	5, 0, NULL, 0),

	SND_SOC_DAPM_PGA("AUX1 Out",
		NAU8822_REG_POWER_MANAGEMENT_3,	8, 0, NULL, 0),
	SND_SOC_DAPM_PGA("AUX2 Out",
		NAU8822_REG_POWER_MANAGEMENT_3,	7, 0, NULL, 0),

	SND_SOC_DAPM_SUPPLY("Mic Bias",
		NAU8822_REG_POWER_MANAGEMENT_1,	4, 0, NULL, 0),
	SND_SOC_DAPM_SUPPLY("PLL",
		NAU8822_REG_POWER_MANAGEMENT_1,	5, 0, NULL, 0),

	SND_SOC_DAPM_SWITCH("Digital Loopback", SND_SOC_NOPM, 0, 0,
		&nau8822_loopback),

	SND_SOC_DAPM_INPUT("LMICN"),
	SND_SOC_DAPM_INPUT("LMICP"),
	SND_SOC_DAPM_INPUT("RMICN"),
	SND_SOC_DAPM_INPUT("RMICP"),
	SND_SOC_DAPM_INPUT("LAUX"),
	SND_SOC_DAPM_INPUT("RAUX"),
	SND_SOC_DAPM_INPUT("L2"),
	SND_SOC_DAPM_INPUT("R2"),
	SND_SOC_DAPM_OUTPUT("LHP"),
	SND_SOC_DAPM_OUTPUT("RHP"),
	SND_SOC_DAPM_OUTPUT("LSPK"),
	SND_SOC_DAPM_OUTPUT("RSPK"),
	SND_SOC_DAPM_OUTPUT("AUXOUT1"),
	SND_SOC_DAPM_OUTPUT("AUXOUT2"),
};

static const struct snd_soc_dapm_route nau8822_dapm_routes[] = {
	{"Right DAC", NULL, "PLL", check_mclk_select_pll},
	{"Left DAC", NULL, "PLL", check_mclk_select_pll},

	/* LMAIN and RMAIN Mixer */
	{"Right Output Mixer", "LDAC Switch", "Left DAC"},
	{"Right Output Mixer", "RDAC Switch", "Right DAC"},
	{"Right Output Mixer", "RAUX Switch", "RAUX"},
	{"Right Output Mixer", "RINMIX Switch", "Right Boost Mixer"},

	{"Left Output Mixer", "LDAC Switch", "Left DAC"},
	{"Left Output Mixer", "RDAC Switch", "Right DAC"},
	{"Left Output Mixer", "LAUX Switch", "LAUX"},
	{"Left Output Mixer", "LINMIX Switch", "Left Boost Mixer"},

	/* AUX1 and AUX2 Mixer */
	{"AUX1 Output Mixer", "RDAC Switch", "Right DAC"},
	{"AUX1 Output Mixer", "RMIX Switch", "Right Output Mixer"},
	{"AUX1 Output Mixer", "RINMIX Switch", "Right Boost Mixer"},
	{"AUX1 Output Mixer", "LDAC Switch", "Left DAC"},
	{"AUX1 Output Mixer", "LMIX Switch", "Left Output Mixer"},

	{"AUX2 Output Mixer", "LDAC Switch", "Left DAC"},
	{"AUX2 Output Mixer", "LMIX Switch", "Left Output Mixer"},
	{"AUX2 Output Mixer", "LINMIX Switch", "Left Boost Mixer"},
	{"AUX2 Output Mixer", "AUX1MIX Output Switch", "AUX1 Output Mixer"},

	/* Outputs */
	{"Right Headphone Out", NULL, "Right Output Mixer"},
	{"RHP", NULL, "Right Headphone Out"},

	{"Left Headphone Out", NULL, "Left Output Mixer"},
	{"LHP", NULL, "Left Headphone Out"},

	{"Right Speaker Out", NULL, "Right Output Mixer"},
	{"RSPK", NULL, "Right Speaker Out"},

	{"Left Speaker Out", NULL, "Left Output Mixer"},
	{"LSPK", NULL, "Left Speaker Out"},

	{"AUX1 Out", NULL, "AUX1 Output Mixer"},
	{"AUX2 Out", NULL, "AUX2 Output Mixer"},
	{"AUXOUT1", NULL, "AUX1 Out"},
	{"AUXOUT2", NULL, "AUX2 Out"},

	/* Boost Mixer */
	{"Right ADC", NULL, "PLL", check_mclk_select_pll},
	{"Left ADC", NULL, "PLL", check_mclk_select_pll},

	{"Right ADC", NULL, "Right Boost Mixer"},

	{"Right Boost Mixer", NULL, "RAUX"},
	{"Right Boost Mixer", NULL, "Right Capture PGA"},
	{"Right Boost Mixer", NULL, "R2"},

	{"Left ADC", NULL, "Left Boost Mixer"},

	{"Left Boost Mixer", NULL, "LAUX"},
	{"Left Boost Mixer", NULL, "Left Capture PGA"},
	{"Left Boost Mixer", NULL, "L2"},

	/* Input PGA */
	{"Right Capture PGA", NULL, "Right Input Mixer"},
	{"Left Capture PGA", NULL, "Left Input Mixer"},

	/* Enable Microphone Power */
	{"Right Capture PGA", NULL, "Mic Bias"},
	{"Left Capture PGA", NULL, "Mic Bias"},

	{"Right Input Mixer", "R2 Switch", "R2"},
	{"Right Input Mixer", "MicN Switch", "RMICN"},
	{"Right Input Mixer", "MicP Switch", "RMICP"},

	{"Left Input Mixer", "L2 Switch", "L2"},
	{"Left Input Mixer", "MicN Switch", "LMICN"},
	{"Left Input Mixer", "MicP Switch", "LMICP"},

	/* Digital Loopback */
	{"Digital Loopback", "Switch", "Left ADC"},
	{"Digital Loopback", "Switch", "Right ADC"},
	{"Left DAC", NULL, "Digital Loopback"},
	{"Right DAC", NULL, "Digital Loopback"},
};

static int nau8822_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
				 unsigned int freq, int dir)
{
	struct snd_soc_component *component = dai->component;
	struct nau8822 *nau8822 = snd_soc_component_get_drvdata(component);

	nau8822->div_id = clk_id;
	nau8822->sysclk = freq;
	dev_dbg(component->dev, "master sysclk %dHz, source %s\n", freq,
		clk_id == NAU8822_CLK_PLL ? "PLL" : "MCLK");

	return 0;
}

static int nau8822_calc_pll(unsigned int pll_in, unsigned int fs,
				struct nau8822_pll *pll_param)
{
	u64 f2, f2_max, pll_ratio;
	int i, scal_sel;

	if (pll_in > NAU_PLL_REF_MAX || pll_in < NAU_PLL_REF_MIN)
		return -EINVAL;
	f2_max = 0;
	scal_sel = ARRAY_SIZE(nau8822_mclk_scaler);

	for (i = 0; i < scal_sel; i++) {
		f2 = 256 * fs * 4 * nau8822_mclk_scaler[i] / 10;
		if (f2 > NAU_PLL_FREQ_MIN && f2 < NAU_PLL_FREQ_MAX &&
			f2_max < f2) {
			f2_max = f2;
			scal_sel = i;
		}
	}

	if (ARRAY_SIZE(nau8822_mclk_scaler) == scal_sel)
		return -EINVAL;
	pll_param->mclk_scaler = scal_sel;
	f2 = f2_max;

	/* Calculate the PLL 4-bit integer input and the PLL 24-bit fractional
	 * input; round up the 24+4bit.
	 */
	pll_ratio = div_u64(f2 << 28, pll_in);
	pll_param->pre_factor = 0;
	if (((pll_ratio >> 28) & 0xF) < NAU_PLL_OPTOP_MIN) {
		pll_ratio <<= 1;
		pll_param->pre_factor = 1;
	}
	pll_param->pll_int = (pll_ratio >> 28) & 0xF;
	pll_param->pll_frac = ((pll_ratio & 0xFFFFFFF) >> 4);

	return 0;
}

static int nau8822_config_clkdiv(struct snd_soc_dai *dai, int div, int rate)
{
	struct snd_soc_component *component = dai->component;
	struct nau8822 *nau8822 = snd_soc_component_get_drvdata(component);
	struct nau8822_pll *pll = &nau8822->pll;
	int i, sclk, imclk;

	switch (nau8822->div_id) {
	case NAU8822_CLK_MCLK:
		/* Configure the master clock prescaler div to make system
		 * clock to approximate the internal master clock (IMCLK);
		 * and large or equal to IMCLK.
		 */
		div = 0;
		imclk = rate * 256;
		for (i = 1; i < ARRAY_SIZE(nau8822_mclk_scaler); i++) {
			sclk = (nau8822->sysclk * 10) /	nau8822_mclk_scaler[i];
			if (sclk < imclk)
				break;
			div = i;
		}
		dev_dbg(component->dev, "master clock prescaler %x for fs %d\n",
			div, rate);

		/* master clock from MCLK and disable PLL */
		snd_soc_component_update_bits(component,
			NAU8822_REG_CLOCKING, NAU8822_MCLKSEL_MASK,
			(div << NAU8822_MCLKSEL_SFT));
		snd_soc_component_update_bits(component,
			NAU8822_REG_CLOCKING, NAU8822_CLKM_MASK,
			NAU8822_CLKM_MCLK);
		break;

	case NAU8822_CLK_PLL:
		/* master clock from PLL and enable PLL */
		if (pll->mclk_scaler != div) {
			dev_err(component->dev,
			"master clock prescaler not meet PLL parameters\n");
			return -EINVAL;
		}
		snd_soc_component_update_bits(component,
			NAU8822_REG_CLOCKING, NAU8822_MCLKSEL_MASK,
			(div << NAU8822_MCLKSEL_SFT));
		snd_soc_component_update_bits(component,
			NAU8822_REG_CLOCKING, NAU8822_CLKM_MASK,
			NAU8822_CLKM_PLL);
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

static int nau8822_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
				unsigned int freq_in, unsigned int freq_out)
{
	struct snd_soc_component *component = dai->component;
	struct nau8822 *nau8822 = snd_soc_component_get_drvdata(component);
	struct nau8822_pll *pll_param = &nau8822->pll;
	int ret, fs;

	fs = freq_out / 256;

	ret = nau8822_calc_pll(freq_in, fs, pll_param);
	if (ret < 0) {
		dev_err(component->dev, "Unsupported input clock %d\n",
			freq_in);
		return ret;
	}

	dev_info(component->dev,
		"pll_int=%x pll_frac=%x mclk_scaler=%x pre_factor=%x\n",
		pll_param->pll_int, pll_param->pll_frac,
		pll_param->mclk_scaler, pll_param->pre_factor);

	snd_soc_component_update_bits(component,
		NAU8822_REG_PLL_N, NAU8822_PLLMCLK_DIV2 | NAU8822_PLLN_MASK,
		(pll_param->pre_factor ? NAU8822_PLLMCLK_DIV2 : 0) |
		pll_param->pll_int);
	snd_soc_component_write(component,
		NAU8822_REG_PLL_K1, (pll_param->pll_frac >> NAU8822_PLLK1_SFT) &
		NAU8822_PLLK1_MASK);
	snd_soc_component_write(component,
		NAU8822_REG_PLL_K2, (pll_param->pll_frac >> NAU8822_PLLK2_SFT) &
		NAU8822_PLLK2_MASK);
	snd_soc_component_write(component,
		NAU8822_REG_PLL_K3, pll_param->pll_frac & NAU8822_PLLK3_MASK);
	snd_soc_component_update_bits(component,
		NAU8822_REG_CLOCKING, NAU8822_MCLKSEL_MASK,
		pll_param->mclk_scaler << NAU8822_MCLKSEL_SFT);
	snd_soc_component_update_bits(component,
		NAU8822_REG_CLOCKING, NAU8822_CLKM_MASK, NAU8822_CLKM_PLL);

	return 0;
}

static int nau8822_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
	struct snd_soc_component *component = dai->component;
	u16 ctrl1_val = 0, ctrl2_val = 0;

	dev_dbg(component->dev, "%s\n", __func__);

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		ctrl2_val |= 1;
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
		ctrl2_val &= ~1;
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		ctrl1_val |= 0x10;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		ctrl1_val |= 0x8;
		break;
	case SND_SOC_DAIFMT_DSP_A:
		ctrl1_val |= 0x18;
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		break;
	case SND_SOC_DAIFMT_IB_IF:
		ctrl1_val |= 0x180;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		ctrl1_val |= 0x100;
		break;
	case SND_SOC_DAIFMT_NB_IF:
		ctrl1_val |= 0x80;
		break;
	default:
		return -EINVAL;
	}

	snd_soc_component_update_bits(component,
		NAU8822_REG_AUDIO_INTERFACE,
		NAU8822_AIFMT_MASK | NAU8822_LRP_MASK | NAU8822_BCLKP_MASK,
		ctrl1_val);
	snd_soc_component_update_bits(component,
		NAU8822_REG_CLOCKING, NAU8822_CLKIOEN_MASK, ctrl2_val);

	return 0;
}

static int nau8822_hw_params(struct snd_pcm_substream *substream,
			    struct snd_pcm_hw_params *params,
			    struct snd_soc_dai *dai)
{
	struct snd_soc_component *component = dai->component;
	struct nau8822 *nau8822 = snd_soc_component_get_drvdata(component);
	int val_len = 0, val_rate = 0;
	unsigned int ctrl_val, bclk_fs, bclk_div;

	/* make BCLK and LRC divide configuration if the codec as master. */
	ctrl_val = snd_soc_component_read(component, NAU8822_REG_CLOCKING);
	if (ctrl_val & NAU8822_CLK_MASTER) {
		/* get the bclk and fs ratio */
		bclk_fs = snd_soc_params_to_bclk(params) / params_rate(params);
		if (bclk_fs <= 32)
			bclk_div = NAU8822_BCLKDIV_8;
		else if (bclk_fs <= 64)
			bclk_div = NAU8822_BCLKDIV_4;
		else if (bclk_fs <= 128)
			bclk_div = NAU8822_BCLKDIV_2;
		else
			return -EINVAL;
		snd_soc_component_update_bits(component, NAU8822_REG_CLOCKING,
				NAU8822_BCLKSEL_MASK, bclk_div);
	}

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		val_len |= NAU8822_WLEN_20;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		val_len |= NAU8822_WLEN_24;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		val_len |= NAU8822_WLEN_32;
		break;
	default:
		return -EINVAL;
	}

	switch (params_rate(params)) {
	case 8000:
		val_rate |= NAU8822_SMPLR_8K;
		break;
	case 11025:
		val_rate |= NAU8822_SMPLR_12K;
		break;
	case 16000:
		val_rate |= NAU8822_SMPLR_16K;
		break;
	case 22050:
		val_rate |= NAU8822_SMPLR_24K;
		break;
	case 32000:
		val_rate |= NAU8822_SMPLR_32K;
		break;
	case 44100:
	case 48000:
		break;
	default:
		return -EINVAL;
	}

	snd_soc_component_update_bits(component,
		NAU8822_REG_AUDIO_INTERFACE, NAU8822_WLEN_MASK, val_len);
	snd_soc_component_update_bits(component,
		NAU8822_REG_ADDITIONAL_CONTROL, NAU8822_SMPLR_MASK, val_rate);

	/* If the master clock is from MCLK, provide the runtime FS for driver
	 * to get the master clock prescaler configuration.
	 */
	if (nau8822->div_id == NAU8822_CLK_MCLK)
		nau8822_config_clkdiv(dai, 0, params_rate(params));

	return 0;
}

static int nau8822_mute(struct snd_soc_dai *dai, int mute, int direction)
{
	struct snd_soc_component *component = dai->component;

	dev_dbg(component->dev, "%s: %d\n", __func__, mute);

	if (mute)
		snd_soc_component_update_bits(component,
			NAU8822_REG_DAC_CONTROL, 0x40, 0x40);
	else
		snd_soc_component_update_bits(component,
			NAU8822_REG_DAC_CONTROL, 0x40, 0);

	return 0;
}

static int nau8822_set_bias_level(struct snd_soc_component *component,
				 enum snd_soc_bias_level level)
{
	switch (level) {
	case SND_SOC_BIAS_ON:
	case SND_SOC_BIAS_PREPARE:
		snd_soc_component_update_bits(component,
			NAU8822_REG_POWER_MANAGEMENT_1,
			NAU8822_REFIMP_MASK, NAU8822_REFIMP_80K);
		break;

	case SND_SOC_BIAS_STANDBY:
		snd_soc_component_update_bits(component,
			NAU8822_REG_POWER_MANAGEMENT_1,
			NAU8822_IOBUF_EN | NAU8822_ABIAS_EN,
			NAU8822_IOBUF_EN | NAU8822_ABIAS_EN);

		if (snd_soc_component_get_bias_level(component) ==
			SND_SOC_BIAS_OFF) {
			snd_soc_component_update_bits(component,
				NAU8822_REG_POWER_MANAGEMENT_1,
				NAU8822_REFIMP_MASK, NAU8822_REFIMP_3K);
			mdelay(100);
		}
		snd_soc_component_update_bits(component,
			NAU8822_REG_POWER_MANAGEMENT_1,
			NAU8822_REFIMP_MASK, NAU8822_REFIMP_300K);
		break;

	case SND_SOC_BIAS_OFF:
		snd_soc_component_write(component,
			NAU8822_REG_POWER_MANAGEMENT_1, 0);
		snd_soc_component_write(component,
			NAU8822_REG_POWER_MANAGEMENT_2, 0);
		snd_soc_component_write(component,
			NAU8822_REG_POWER_MANAGEMENT_3, 0);
		break;
	}

	dev_dbg(component->dev, "%s: %d\n", __func__, level);

	return 0;
}

#define NAU8822_RATES (SNDRV_PCM_RATE_8000_48000)

#define NAU8822_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
	SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)

static const struct snd_soc_dai_ops nau8822_dai_ops = {
	.hw_params	= nau8822_hw_params,
	.mute_stream	= nau8822_mute,
	.set_fmt	= nau8822_set_dai_fmt,
	.set_sysclk	= nau8822_set_dai_sysclk,
	.set_pll	= nau8822_set_pll,
	.no_capture_mute = 1,
};

static struct snd_soc_dai_driver nau8822_dai = {
	.name = "nau8822-hifi",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 1,
		.channels_max = 2,
		.rates = NAU8822_RATES,
		.formats = NAU8822_FORMATS,
	},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 1,
		.channels_max = 2,
		.rates = NAU8822_RATES,
		.formats = NAU8822_FORMATS,
	},
	.ops = &nau8822_dai_ops,
	.symmetric_rate = 1,
};

static int nau8822_suspend(struct snd_soc_component *component)
{
	struct nau8822 *nau8822 = snd_soc_component_get_drvdata(component);

	snd_soc_component_force_bias_level(component, SND_SOC_BIAS_OFF);

	regcache_mark_dirty(nau8822->regmap);

	return 0;
}

static int nau8822_resume(struct snd_soc_component *component)
{
	struct nau8822 *nau8822 = snd_soc_component_get_drvdata(component);

	regcache_sync(nau8822->regmap);

	snd_soc_component_force_bias_level(component, SND_SOC_BIAS_STANDBY);

	return 0;
}

/*
 * These registers contain an "update" bit - bit 8. This means, for example,
 * that one can write new DAC digital volume for both channels, but only when
 * the update bit is set, will also the volume be updated - simultaneously for
 * both channels.
 */
static const int update_reg[] = {
	NAU8822_REG_LEFT_DAC_DIGITAL_VOLUME,
	NAU8822_REG_RIGHT_DAC_DIGITAL_VOLUME,
	NAU8822_REG_LEFT_ADC_DIGITAL_VOLUME,
	NAU8822_REG_RIGHT_ADC_DIGITAL_VOLUME,
	NAU8822_REG_LEFT_INP_PGA_CONTROL,
	NAU8822_REG_RIGHT_INP_PGA_CONTROL,
	NAU8822_REG_LHP_VOLUME,
	NAU8822_REG_RHP_VOLUME,
	NAU8822_REG_LSPKOUT_VOLUME,
	NAU8822_REG_RSPKOUT_VOLUME,
};

static int nau8822_probe(struct snd_soc_component *component)
{
	int i;

	/*
	 * Set the update bit in all registers, that have one. This way all
	 * writes to those registers will also cause the update bit to be
	 * written.
	 */
	for (i = 0; i < ARRAY_SIZE(update_reg); i++)
		snd_soc_component_update_bits(component,
			update_reg[i], 0x100, 0x100);

	return 0;
}

static const struct snd_soc_component_driver soc_component_dev_nau8822 = {
	.probe				= nau8822_probe,
	.suspend			= nau8822_suspend,
	.resume				= nau8822_resume,
	.set_bias_level			= nau8822_set_bias_level,
	.controls			= nau8822_snd_controls,
	.num_controls			= ARRAY_SIZE(nau8822_snd_controls),
	.dapm_widgets			= nau8822_dapm_widgets,
	.num_dapm_widgets		= ARRAY_SIZE(nau8822_dapm_widgets),
	.dapm_routes			= nau8822_dapm_routes,
	.num_dapm_routes		= ARRAY_SIZE(nau8822_dapm_routes),
	.idle_bias_on			= 1,
	.use_pmdown_time		= 1,
	.endianness			= 1,
	.non_legacy_dai_naming		= 1,
};

static const struct regmap_config nau8822_regmap_config = {
	.reg_bits = 7,
	.val_bits = 9,

	.max_register = NAU8822_REG_MAX_REGISTER,
	.volatile_reg = nau8822_volatile,

	.readable_reg = nau8822_readable_reg,
	.writeable_reg = nau8822_writeable_reg,

	.cache_type = REGCACHE_RBTREE,
	.reg_defaults = nau8822_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(nau8822_reg_defaults),
};

static int nau8822_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct device *dev = &i2c->dev;
	struct nau8822 *nau8822 = dev_get_platdata(dev);
	int ret;

	if (!nau8822) {
		nau8822 = devm_kzalloc(dev, sizeof(*nau8822), GFP_KERNEL);
		if (nau8822 == NULL)
			return -ENOMEM;
	}
	i2c_set_clientdata(i2c, nau8822);

	nau8822->regmap = devm_regmap_init_i2c(i2c, &nau8822_regmap_config);
	if (IS_ERR(nau8822->regmap)) {
		ret = PTR_ERR(nau8822->regmap);
		dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
		return ret;
	}
	nau8822->dev = dev;

	/* Reset the codec */
	ret = regmap_write(nau8822->regmap, NAU8822_REG_RESET, 0x00);
	if (ret != 0) {
		dev_err(&i2c->dev, "Failed to issue reset: %d\n", ret);
		return ret;
	}

	ret = devm_snd_soc_register_component(dev, &soc_component_dev_nau8822,
						&nau8822_dai, 1);
	if (ret != 0) {
		dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
		return ret;
	}

	return 0;
}

static const struct i2c_device_id nau8822_i2c_id[] = {
	{ "nau8822", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, nau8822_i2c_id);

#ifdef CONFIG_OF
static const struct of_device_id nau8822_of_match[] = {
	{ .compatible = "nuvoton,nau8822", },
	{ }
};
MODULE_DEVICE_TABLE(of, nau8822_of_match);
#endif

static struct i2c_driver nau8822_i2c_driver = {
	.driver = {
		.name = "nau8822",
		.of_match_table = of_match_ptr(nau8822_of_match),
	},
	.probe =    nau8822_i2c_probe,
	.id_table = nau8822_i2c_id,
};
module_i2c_driver(nau8822_i2c_driver);

MODULE_DESCRIPTION("ASoC NAU8822 codec driver");
MODULE_AUTHOR("David Lin <ctlin0@nuvoton.com>");
MODULE_LICENSE("GPL v2");