text: /*
   * ak4671.c  --  audio driver for AK4671
   *
   * Copyright (C) 2009 Samsung Electronics Co.Ltd
   * Author: Joonyoung Shim <jy0922.shim@samsung.com>
   *
   *  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/module.h>
  #include <linux/init.h>
  #include <linux/i2c.h>
  #include <linux/delay.h>
  #include <linux/regmap.h>
  #include <linux/slab.h>
  #include <sound/soc.h>
  #include <sound/initval.h>
  #include <sound/tlv.h>
  
  #include "ak4671.h"
  
  
  /* ak4671 register cache & default register settings */
  static const struct reg_default ak4671_reg_defaults[] = {
  	{ 0x00, 0x00 },	/* AK4671_AD_DA_POWER_MANAGEMENT	(0x00)	*/
  	{ 0x01, 0xf6 },	/* AK4671_PLL_MODE_SELECT0		(0x01)	*/
  	{ 0x02, 0x00 },	/* AK4671_PLL_MODE_SELECT1		(0x02)	*/
  	{ 0x03, 0x02 },	/* AK4671_FORMAT_SELECT			(0x03)	*/
  	{ 0x04, 0x00 },	/* AK4671_MIC_SIGNAL_SELECT		(0x04)	*/
  	{ 0x05, 0x55 },	/* AK4671_MIC_AMP_GAIN			(0x05)	*/
  	{ 0x06, 0x00 },	/* AK4671_MIXING_POWER_MANAGEMENT0	(0x06)	*/
  	{ 0x07, 0x00 },	/* AK4671_MIXING_POWER_MANAGEMENT1	(0x07)	*/
  	{ 0x08, 0xb5 },	/* AK4671_OUTPUT_VOLUME_CONTROL		(0x08)	*/
  	{ 0x09, 0x00 },	/* AK4671_LOUT1_SIGNAL_SELECT		(0x09)	*/
  	{ 0x0a, 0x00 },	/* AK4671_ROUT1_SIGNAL_SELECT		(0x0a)	*/
  	{ 0x0b, 0x00 },	/* AK4671_LOUT2_SIGNAL_SELECT		(0x0b)	*/
  	{ 0x0c, 0x00 },	/* AK4671_ROUT2_SIGNAL_SELECT		(0x0c)	*/
  	{ 0x0d, 0x00 },	/* AK4671_LOUT3_SIGNAL_SELECT		(0x0d)	*/
  	{ 0x0e, 0x00 },	/* AK4671_ROUT3_SIGNAL_SELECT		(0x0e)	*/
  	{ 0x0f, 0x00 },	/* AK4671_LOUT1_POWER_MANAGERMENT	(0x0f)	*/
  	{ 0x10, 0x00 },	/* AK4671_LOUT2_POWER_MANAGERMENT	(0x10)	*/
  	{ 0x11, 0x80 },	/* AK4671_LOUT3_POWER_MANAGERMENT	(0x11)	*/
  	{ 0x12, 0x91 },	/* AK4671_LCH_INPUT_VOLUME_CONTROL	(0x12)	*/
  	{ 0x13, 0x91 },	/* AK4671_RCH_INPUT_VOLUME_CONTROL	(0x13)	*/
  	{ 0x14, 0xe1 },	/* AK4671_ALC_REFERENCE_SELECT		(0x14)	*/
  	{ 0x15, 0x00 },	/* AK4671_DIGITAL_MIXING_CONTROL	(0x15)	*/
  	{ 0x16, 0x00 },	/* AK4671_ALC_TIMER_SELECT		(0x16)	*/
  	{ 0x17, 0x00 },	/* AK4671_ALC_MODE_CONTROL		(0x17)	*/
  	{ 0x18, 0x02 },	/* AK4671_MODE_CONTROL1			(0x18)	*/
  	{ 0x19, 0x01 },	/* AK4671_MODE_CONTROL2			(0x19)	*/
  	{ 0x1a, 0x18 },	/* AK4671_LCH_OUTPUT_VOLUME_CONTROL	(0x1a)	*/
  	{ 0x1b, 0x18 },	/* AK4671_RCH_OUTPUT_VOLUME_CONTROL	(0x1b)	*/
  	{ 0x1c, 0x00 },	/* AK4671_SIDETONE_A_CONTROL		(0x1c)	*/
  	{ 0x1d, 0x02 },	/* AK4671_DIGITAL_FILTER_SELECT		(0x1d)	*/
  	{ 0x1e, 0x00 },	/* AK4671_FIL3_COEFFICIENT0		(0x1e)	*/
  	{ 0x1f, 0x00 },	/* AK4671_FIL3_COEFFICIENT1		(0x1f)	*/
  	{ 0x20, 0x00 },	/* AK4671_FIL3_COEFFICIENT2		(0x20)	*/
  	{ 0x21, 0x00 },	/* AK4671_FIL3_COEFFICIENT3		(0x21)	*/
  	{ 0x22, 0x00 },	/* AK4671_EQ_COEFFICIENT0		(0x22)	*/
  	{ 0x23, 0x00 },	/* AK4671_EQ_COEFFICIENT1		(0x23)	*/
  	{ 0x24, 0x00 },	/* AK4671_EQ_COEFFICIENT2		(0x24)	*/
  	{ 0x25, 0x00 },	/* AK4671_EQ_COEFFICIENT3		(0x25)	*/
  	{ 0x26, 0x00 },	/* AK4671_EQ_COEFFICIENT4		(0x26)	*/
  	{ 0x27, 0x00 },	/* AK4671_EQ_COEFFICIENT5		(0x27)	*/
  	{ 0x28, 0xa9 },	/* AK4671_FIL1_COEFFICIENT0		(0x28)	*/
  	{ 0x29, 0x1f },	/* AK4671_FIL1_COEFFICIENT1		(0x29)	*/
  	{ 0x2a, 0xad },	/* AK4671_FIL1_COEFFICIENT2		(0x2a)	*/
  	{ 0x2b, 0x20 },	/* AK4671_FIL1_COEFFICIENT3		(0x2b)	*/
  	{ 0x2c, 0x00 },	/* AK4671_FIL2_COEFFICIENT0		(0x2c)	*/
  	{ 0x2d, 0x00 },	/* AK4671_FIL2_COEFFICIENT1		(0x2d)	*/
  	{ 0x2e, 0x00 },	/* AK4671_FIL2_COEFFICIENT2		(0x2e)	*/
  	{ 0x2f, 0x00 },	/* AK4671_FIL2_COEFFICIENT3		(0x2f)	*/
  	{ 0x30, 0x00 },	/* AK4671_DIGITAL_FILTER_SELECT2	(0x30)	*/
  
  	{ 0x32, 0x00 },	/* AK4671_E1_COEFFICIENT0		(0x32)	*/
  	{ 0x33, 0x00 },	/* AK4671_E1_COEFFICIENT1		(0x33)	*/
  	{ 0x34, 0x00 },	/* AK4671_E1_COEFFICIENT2		(0x34)	*/
  	{ 0x35, 0x00 },	/* AK4671_E1_COEFFICIENT3		(0x35)	*/
  	{ 0x36, 0x00 },	/* AK4671_E1_COEFFICIENT4		(0x36)	*/
  	{ 0x37, 0x00 },	/* AK4671_E1_COEFFICIENT5		(0x37)	*/
  	{ 0x38, 0x00 },	/* AK4671_E2_COEFFICIENT0		(0x38)	*/
  	{ 0x39, 0x00 },	/* AK4671_E2_COEFFICIENT1		(0x39)	*/
  	{ 0x3a, 0x00 },	/* AK4671_E2_COEFFICIENT2		(0x3a)	*/
  	{ 0x3b, 0x00 },	/* AK4671_E2_COEFFICIENT3		(0x3b)	*/
  	{ 0x3c, 0x00 },	/* AK4671_E2_COEFFICIENT4		(0x3c)	*/
  	{ 0x3d, 0x00 },	/* AK4671_E2_COEFFICIENT5		(0x3d)	*/
  	{ 0x3e, 0x00 },	/* AK4671_E3_COEFFICIENT0		(0x3e)	*/
  	{ 0x3f, 0x00 },	/* AK4671_E3_COEFFICIENT1		(0x3f)	*/
  	{ 0x40, 0x00 },	/* AK4671_E3_COEFFICIENT2		(0x40)	*/
  	{ 0x41, 0x00 },	/* AK4671_E3_COEFFICIENT3		(0x41)	*/
  	{ 0x42, 0x00 },	/* AK4671_E3_COEFFICIENT4		(0x42)	*/
  	{ 0x43, 0x00 },	/* AK4671_E3_COEFFICIENT5		(0x43)	*/
  	{ 0x44, 0x00 },	/* AK4671_E4_COEFFICIENT0		(0x44)	*/
  	{ 0x45, 0x00 },	/* AK4671_E4_COEFFICIENT1		(0x45)	*/
  	{ 0x46, 0x00 },	/* AK4671_E4_COEFFICIENT2		(0x46)	*/
  	{ 0x47, 0x00 },	/* AK4671_E4_COEFFICIENT3		(0x47)	*/
  	{ 0x48, 0x00 },	/* AK4671_E4_COEFFICIENT4		(0x48)	*/
  	{ 0x49, 0x00 },	/* AK4671_E4_COEFFICIENT5		(0x49)	*/
  	{ 0x4a, 0x00 },	/* AK4671_E5_COEFFICIENT0		(0x4a)	*/
  	{ 0x4b, 0x00 },	/* AK4671_E5_COEFFICIENT1		(0x4b)	*/
  	{ 0x4c, 0x00 },	/* AK4671_E5_COEFFICIENT2		(0x4c)	*/
  	{ 0x4d, 0x00 },	/* AK4671_E5_COEFFICIENT3		(0x4d)	*/
  	{ 0x4e, 0x00 },	/* AK4671_E5_COEFFICIENT4		(0x4e)	*/
  	{ 0x4f, 0x00 },	/* AK4671_E5_COEFFICIENT5		(0x4f)	*/
  	{ 0x50, 0x88 },	/* AK4671_EQ_CONTROL_250HZ_100HZ	(0x50)	*/
  	{ 0x51, 0x88 },	/* AK4671_EQ_CONTROL_3500HZ_1KHZ	(0x51)	*/
  	{ 0x52, 0x08 },	/* AK4671_EQ_CONTRO_10KHZ		(0x52)	*/
  	{ 0x53, 0x00 },	/* AK4671_PCM_IF_CONTROL0		(0x53)	*/
  	{ 0x54, 0x00 },	/* AK4671_PCM_IF_CONTROL1		(0x54)	*/
  	{ 0x55, 0x00 },	/* AK4671_PCM_IF_CONTROL2		(0x55)	*/
  	{ 0x56, 0x18 },	/* AK4671_DIGITAL_VOLUME_B_CONTROL	(0x56)	*/
  	{ 0x57, 0x18 },	/* AK4671_DIGITAL_VOLUME_C_CONTROL	(0x57)	*/
  	{ 0x58, 0x00 },	/* AK4671_SIDETONE_VOLUME_CONTROL	(0x58)	*/
  	{ 0x59, 0x00 },	/* AK4671_DIGITAL_MIXING_CONTROL2	(0x59)	*/
  	{ 0x5a, 0x00 },	/* AK4671_SAR_ADC_CONTROL		(0x5a)	*/
  };
  
  /*
   * LOUT1/ROUT1 output volume control:
   * from -24 to 6 dB in 6 dB steps (mute instead of -30 dB)
   */
  static DECLARE_TLV_DB_SCALE(out1_tlv, -3000, 600, 1);
  
  /*
   * LOUT2/ROUT2 output volume control:
   * from -33 to 6 dB in 3 dB steps (mute instead of -33 dB)
   */
  static DECLARE_TLV_DB_SCALE(out2_tlv, -3300, 300, 1);
  
  /*
   * LOUT3/ROUT3 output volume control:
   * from -6 to 3 dB in 3 dB steps
   */
  static DECLARE_TLV_DB_SCALE(out3_tlv, -600, 300, 0);
  
  /*
   * Mic amp gain control:
   * from -15 to 30 dB in 3 dB steps
   * REVISIT: The actual min value(0x01) is -12 dB and the reg value 0x00 is not
   * available
   */
  static DECLARE_TLV_DB_SCALE(mic_amp_tlv, -1500, 300, 0);
  
  static const struct snd_kcontrol_new ak4671_snd_controls[] = {
  	/* Common playback gain controls */
  	SOC_SINGLE_TLV("Line Output1 Playback Volume",
  			AK4671_OUTPUT_VOLUME_CONTROL, 0, 0x6, 0, out1_tlv),
  	SOC_SINGLE_TLV("Headphone Output2 Playback Volume",
  			AK4671_OUTPUT_VOLUME_CONTROL, 4, 0xd, 0, out2_tlv),
  	SOC_SINGLE_TLV("Line Output3 Playback Volume",
  			AK4671_LOUT3_POWER_MANAGERMENT, 6, 0x3, 0, out3_tlv),
  
  	/* Common capture gain controls */
  	SOC_DOUBLE_TLV("Mic Amp Capture Volume",
  			AK4671_MIC_AMP_GAIN, 0, 4, 0xf, 0, mic_amp_tlv),
  };
  
  /* event handlers */
  static int ak4671_out2_event(struct snd_soc_dapm_widget *w,
  		struct snd_kcontrol *kcontrol, int event)
  {
  	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
  
  	switch (event) {
  	case SND_SOC_DAPM_POST_PMU:
  		snd_soc_update_bits(codec, AK4671_LOUT2_POWER_MANAGERMENT,
  				    AK4671_MUTEN, AK4671_MUTEN);
  		break;
  	case SND_SOC_DAPM_PRE_PMD:
  		snd_soc_update_bits(codec, AK4671_LOUT2_POWER_MANAGERMENT,
  				    AK4671_MUTEN, 0);
  		break;
  	}
  
  	return 0;
  }
  
  /* Output Mixers */
  static const struct snd_kcontrol_new ak4671_lout1_mixer_controls[] = {
  	SOC_DAPM_SINGLE("DACL", AK4671_LOUT1_SIGNAL_SELECT, 0, 1, 0),
  	SOC_DAPM_SINGLE("LINL1", AK4671_LOUT1_SIGNAL_SELECT, 1, 1, 0),
  	SOC_DAPM_SINGLE("LINL2", AK4671_LOUT1_SIGNAL_SELECT, 2, 1, 0),
  	SOC_DAPM_SINGLE("LINL3", AK4671_LOUT1_SIGNAL_SELECT, 3, 1, 0),
  	SOC_DAPM_SINGLE("LINL4", AK4671_LOUT1_SIGNAL_SELECT, 4, 1, 0),
  	SOC_DAPM_SINGLE("LOOPL", AK4671_LOUT1_SIGNAL_SELECT, 5, 1, 0),
  };
  
  static const struct snd_kcontrol_new ak4671_rout1_mixer_controls[] = {
  	SOC_DAPM_SINGLE("DACR", AK4671_ROUT1_SIGNAL_SELECT, 0, 1, 0),
  	SOC_DAPM_SINGLE("RINR1", AK4671_ROUT1_SIGNAL_SELECT, 1, 1, 0),
  	SOC_DAPM_SINGLE("RINR2", AK4671_ROUT1_SIGNAL_SELECT, 2, 1, 0),
  	SOC_DAPM_SINGLE("RINR3", AK4671_ROUT1_SIGNAL_SELECT, 3, 1, 0),
  	SOC_DAPM_SINGLE("RINR4", AK4671_ROUT1_SIGNAL_SELECT, 4, 1, 0),
  	SOC_DAPM_SINGLE("LOOPR", AK4671_ROUT1_SIGNAL_SELECT, 5, 1, 0),
  };
  
  static const struct snd_kcontrol_new ak4671_lout2_mixer_controls[] = {
  	SOC_DAPM_SINGLE("DACHL", AK4671_LOUT2_SIGNAL_SELECT, 0, 1, 0),
  	SOC_DAPM_SINGLE("LINH1", AK4671_LOUT2_SIGNAL_SELECT, 1, 1, 0),
  	SOC_DAPM_SINGLE("LINH2", AK4671_LOUT2_SIGNAL_SELECT, 2, 1, 0),
  	SOC_DAPM_SINGLE("LINH3", AK4671_LOUT2_SIGNAL_SELECT, 3, 1, 0),
  	SOC_DAPM_SINGLE("LINH4", AK4671_LOUT2_SIGNAL_SELECT, 4, 1, 0),
  	SOC_DAPM_SINGLE("LOOPHL", AK4671_LOUT2_SIGNAL_SELECT, 5, 1, 0),
  };
  
  static const struct snd_kcontrol_new ak4671_rout2_mixer_controls[] = {
  	SOC_DAPM_SINGLE("DACHR", AK4671_ROUT2_SIGNAL_SELECT, 0, 1, 0),
  	SOC_DAPM_SINGLE("RINH1", AK4671_ROUT2_SIGNAL_SELECT, 1, 1, 0),
  	SOC_DAPM_SINGLE("RINH2", AK4671_ROUT2_SIGNAL_SELECT, 2, 1, 0),
  	SOC_DAPM_SINGLE("RINH3", AK4671_ROUT2_SIGNAL_SELECT, 3, 1, 0),
  	SOC_DAPM_SINGLE("RINH4", AK4671_ROUT2_SIGNAL_SELECT, 4, 1, 0),
  	SOC_DAPM_SINGLE("LOOPHR", AK4671_ROUT2_SIGNAL_SELECT, 5, 1, 0),
  };
  
  static const struct snd_kcontrol_new ak4671_lout3_mixer_controls[] = {
  	SOC_DAPM_SINGLE("DACSL", AK4671_LOUT3_SIGNAL_SELECT, 0, 1, 0),
  	SOC_DAPM_SINGLE("LINS1", AK4671_LOUT3_SIGNAL_SELECT, 1, 1, 0),
  	SOC_DAPM_SINGLE("LINS2", AK4671_LOUT3_SIGNAL_SELECT, 2, 1, 0),
  	SOC_DAPM_SINGLE("LINS3", AK4671_LOUT3_SIGNAL_SELECT, 3, 1, 0),
  	SOC_DAPM_SINGLE("LINS4", AK4671_LOUT3_SIGNAL_SELECT, 4, 1, 0),
  	SOC_DAPM_SINGLE("LOOPSL", AK4671_LOUT3_SIGNAL_SELECT, 5, 1, 0),
  };
  
  static const struct snd_kcontrol_new ak4671_rout3_mixer_controls[] = {
  	SOC_DAPM_SINGLE("DACSR", AK4671_ROUT3_SIGNAL_SELECT, 0, 1, 0),
  	SOC_DAPM_SINGLE("RINS1", AK4671_ROUT3_SIGNAL_SELECT, 1, 1, 0),
  	SOC_DAPM_SINGLE("RINS2", AK4671_ROUT3_SIGNAL_SELECT, 2, 1, 0),
  	SOC_DAPM_SINGLE("RINS3", AK4671_ROUT3_SIGNAL_SELECT, 3, 1, 0),
  	SOC_DAPM_SINGLE("RINS4", AK4671_ROUT3_SIGNAL_SELECT, 4, 1, 0),
  	SOC_DAPM_SINGLE("LOOPSR", AK4671_ROUT3_SIGNAL_SELECT, 5, 1, 0),
  };
  
  /* Input MUXs */
  static const char *ak4671_lin_mux_texts[] =
  		{"LIN1", "LIN2", "LIN3", "LIN4"};
  static SOC_ENUM_SINGLE_DECL(ak4671_lin_mux_enum,
  			    AK4671_MIC_SIGNAL_SELECT, 0,
  			    ak4671_lin_mux_texts);
  static const struct snd_kcontrol_new ak4671_lin_mux_control =
  	SOC_DAPM_ENUM("Route", ak4671_lin_mux_enum);
  
  static const char *ak4671_rin_mux_texts[] =
  		{"RIN1", "RIN2", "RIN3", "RIN4"};
  static SOC_ENUM_SINGLE_DECL(ak4671_rin_mux_enum,
  			    AK4671_MIC_SIGNAL_SELECT, 2,
  			    ak4671_rin_mux_texts);
  static const struct snd_kcontrol_new ak4671_rin_mux_control =
  	SOC_DAPM_ENUM("Route", ak4671_rin_mux_enum);
  
  static const struct snd_soc_dapm_widget ak4671_dapm_widgets[] = {
  	/* Inputs */
  	SND_SOC_DAPM_INPUT("LIN1"),
  	SND_SOC_DAPM_INPUT("RIN1"),
  	SND_SOC_DAPM_INPUT("LIN2"),
  	SND_SOC_DAPM_INPUT("RIN2"),
  	SND_SOC_DAPM_INPUT("LIN3"),
  	SND_SOC_DAPM_INPUT("RIN3"),
  	SND_SOC_DAPM_INPUT("LIN4"),
  	SND_SOC_DAPM_INPUT("RIN4"),
  
  	/* Outputs */
  	SND_SOC_DAPM_OUTPUT("LOUT1"),
  	SND_SOC_DAPM_OUTPUT("ROUT1"),
  	SND_SOC_DAPM_OUTPUT("LOUT2"),
  	SND_SOC_DAPM_OUTPUT("ROUT2"),
  	SND_SOC_DAPM_OUTPUT("LOUT3"),
  	SND_SOC_DAPM_OUTPUT("ROUT3"),
  
  	/* DAC */
  	SND_SOC_DAPM_DAC("DAC Left", "Left HiFi Playback",
  			AK4671_AD_DA_POWER_MANAGEMENT, 6, 0),
  	SND_SOC_DAPM_DAC("DAC Right", "Right HiFi Playback",
  			AK4671_AD_DA_POWER_MANAGEMENT, 7, 0),
  
  	/* ADC */
  	SND_SOC_DAPM_ADC("ADC Left", "Left HiFi Capture",
  			AK4671_AD_DA_POWER_MANAGEMENT, 4, 0),
  	SND_SOC_DAPM_ADC("ADC Right", "Right HiFi Capture",
  			AK4671_AD_DA_POWER_MANAGEMENT, 5, 0),
  
  	/* PGA */
  	SND_SOC_DAPM_PGA("LOUT2 Mix Amp",
  			AK4671_LOUT2_POWER_MANAGERMENT, 5, 0, NULL, 0),
  	SND_SOC_DAPM_PGA("ROUT2 Mix Amp",
  			AK4671_LOUT2_POWER_MANAGERMENT, 6, 0, NULL, 0),
  
  	SND_SOC_DAPM_PGA("LIN1 Mixing Circuit",
  			AK4671_MIXING_POWER_MANAGEMENT1, 0, 0, NULL, 0),
  	SND_SOC_DAPM_PGA("RIN1 Mixing Circuit",
  			AK4671_MIXING_POWER_MANAGEMENT1, 1, 0, NULL, 0),
  	SND_SOC_DAPM_PGA("LIN2 Mixing Circuit",
  			AK4671_MIXING_POWER_MANAGEMENT1, 2, 0, NULL, 0),
  	SND_SOC_DAPM_PGA("RIN2 Mixing Circuit",
  			AK4671_MIXING_POWER_MANAGEMENT1, 3, 0, NULL, 0),
  	SND_SOC_DAPM_PGA("LIN3 Mixing Circuit",
  			AK4671_MIXING_POWER_MANAGEMENT1, 4, 0, NULL, 0),
  	SND_SOC_DAPM_PGA("RIN3 Mixing Circuit",
  			AK4671_MIXING_POWER_MANAGEMENT1, 5, 0, NULL, 0),
  	SND_SOC_DAPM_PGA("LIN4 Mixing Circuit",
  			AK4671_MIXING_POWER_MANAGEMENT1, 6, 0, NULL, 0),
  	SND_SOC_DAPM_PGA("RIN4 Mixing Circuit",
  			AK4671_MIXING_POWER_MANAGEMENT1, 7, 0, NULL, 0),
  
  	/* Output Mixers */
  	SND_SOC_DAPM_MIXER("LOUT1 Mixer", AK4671_LOUT1_POWER_MANAGERMENT, 0, 0,
  			&ak4671_lout1_mixer_controls[0],
  			ARRAY_SIZE(ak4671_lout1_mixer_controls)),
  	SND_SOC_DAPM_MIXER("ROUT1 Mixer", AK4671_LOUT1_POWER_MANAGERMENT, 1, 0,
  			&ak4671_rout1_mixer_controls[0],
  			ARRAY_SIZE(ak4671_rout1_mixer_controls)),
  	SND_SOC_DAPM_MIXER_E("LOUT2 Mixer", AK4671_LOUT2_POWER_MANAGERMENT,
  			0, 0, &ak4671_lout2_mixer_controls[0],
  			ARRAY_SIZE(ak4671_lout2_mixer_controls),
  			ak4671_out2_event,
  			SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_PRE_PMD),
  	SND_SOC_DAPM_MIXER_E("ROUT2 Mixer", AK4671_LOUT2_POWER_MANAGERMENT,
  			1, 0, &ak4671_rout2_mixer_controls[0],
  			ARRAY_SIZE(ak4671_rout2_mixer_controls),
  			ak4671_out2_event,
  			SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_PRE_PMD),
  	SND_SOC_DAPM_MIXER("LOUT3 Mixer", AK4671_LOUT3_POWER_MANAGERMENT, 0, 0,
  			&ak4671_lout3_mixer_controls[0],
  			ARRAY_SIZE(ak4671_lout3_mixer_controls)),
  	SND_SOC_DAPM_MIXER("ROUT3 Mixer", AK4671_LOUT3_POWER_MANAGERMENT, 1, 0,
  			&ak4671_rout3_mixer_controls[0],
  			ARRAY_SIZE(ak4671_rout3_mixer_controls)),
  
  	/* Input MUXs */
  	SND_SOC_DAPM_MUX("LIN MUX", AK4671_AD_DA_POWER_MANAGEMENT, 2, 0,
  			&ak4671_lin_mux_control),
  	SND_SOC_DAPM_MUX("RIN MUX", AK4671_AD_DA_POWER_MANAGEMENT, 3, 0,
  			&ak4671_rin_mux_control),
  
  	/* Mic Power */
  	SND_SOC_DAPM_MICBIAS("Mic Bias", AK4671_AD_DA_POWER_MANAGEMENT, 1, 0),
  
  	/* Supply */
  	SND_SOC_DAPM_SUPPLY("PMPLL", AK4671_PLL_MODE_SELECT1, 0, 0, NULL, 0),
  };
  
  static const struct snd_soc_dapm_route ak4671_intercon[] = {
  	{"DAC Left", NULL, "PMPLL"},
  	{"DAC Right", NULL, "PMPLL"},
  	{"ADC Left", NULL, "PMPLL"},
  	{"ADC Right", NULL, "PMPLL"},
  
  	/* Outputs */
  	{"LOUT1", NULL, "LOUT1 Mixer"},
  	{"ROUT1", NULL, "ROUT1 Mixer"},
  	{"LOUT2", NULL, "LOUT2 Mix Amp"},
  	{"ROUT2", NULL, "ROUT2 Mix Amp"},
  	{"LOUT3", NULL, "LOUT3 Mixer"},
  	{"ROUT3", NULL, "ROUT3 Mixer"},
  
  	{"LOUT1 Mixer", "DACL", "DAC Left"},
  	{"ROUT1 Mixer", "DACR", "DAC Right"},
  	{"LOUT2 Mixer", "DACHL", "DAC Left"},
  	{"ROUT2 Mixer", "DACHR", "DAC Right"},
  	{"LOUT2 Mix Amp", NULL, "LOUT2 Mixer"},
  	{"ROUT2 Mix Amp", NULL, "ROUT2 Mixer"},
  	{"LOUT3 Mixer", "DACSL", "DAC Left"},
  	{"ROUT3 Mixer", "DACSR", "DAC Right"},
  
  	/* Inputs */
  	{"LIN MUX", "LIN1", "LIN1"},
  	{"LIN MUX", "LIN2", "LIN2"},
  	{"LIN MUX", "LIN3", "LIN3"},
  	{"LIN MUX", "LIN4", "LIN4"},
  
  	{"RIN MUX", "RIN1", "RIN1"},
  	{"RIN MUX", "RIN2", "RIN2"},
  	{"RIN MUX", "RIN3", "RIN3"},
  	{"RIN MUX", "RIN4", "RIN4"},
  
  	{"LIN1", NULL, "Mic Bias"},
  	{"RIN1", NULL, "Mic Bias"},
  	{"LIN2", NULL, "Mic Bias"},
  	{"RIN2", NULL, "Mic Bias"},
  
  	{"ADC Left", NULL, "LIN MUX"},
  	{"ADC Right", NULL, "RIN MUX"},
  
  	/* Analog Loops */
  	{"LIN1 Mixing Circuit", NULL, "LIN1"},
  	{"RIN1 Mixing Circuit", NULL, "RIN1"},
  	{"LIN2 Mixing Circuit", NULL, "LIN2"},
  	{"RIN2 Mixing Circuit", NULL, "RIN2"},
  	{"LIN3 Mixing Circuit", NULL, "LIN3"},
  	{"RIN3 Mixing Circuit", NULL, "RIN3"},
  	{"LIN4 Mixing Circuit", NULL, "LIN4"},
  	{"RIN4 Mixing Circuit", NULL, "RIN4"},
  
  	{"LOUT1 Mixer", "LINL1", "LIN1 Mixing Circuit"},
  	{"ROUT1 Mixer", "RINR1", "RIN1 Mixing Circuit"},
  	{"LOUT2 Mixer", "LINH1", "LIN1 Mixing Circuit"},
  	{"ROUT2 Mixer", "RINH1", "RIN1 Mixing Circuit"},
  	{"LOUT3 Mixer", "LINS1", "LIN1 Mixing Circuit"},
  	{"ROUT3 Mixer", "RINS1", "RIN1 Mixing Circuit"},
  
  	{"LOUT1 Mixer", "LINL2", "LIN2 Mixing Circuit"},
  	{"ROUT1 Mixer", "RINR2", "RIN2 Mixing Circuit"},
  	{"LOUT2 Mixer", "LINH2", "LIN2 Mixing Circuit"},
  	{"ROUT2 Mixer", "RINH2", "RIN2 Mixing Circuit"},
  	{"LOUT3 Mixer", "LINS2", "LIN2 Mixing Circuit"},
  	{"ROUT3 Mixer", "RINS2", "RIN2 Mixing Circuit"},
  
  	{"LOUT1 Mixer", "LINL3", "LIN3 Mixing Circuit"},
  	{"ROUT1 Mixer", "RINR3", "RIN3 Mixing Circuit"},
  	{"LOUT2 Mixer", "LINH3", "LIN3 Mixing Circuit"},
  	{"ROUT2 Mixer", "RINH3", "RIN3 Mixing Circuit"},
  	{"LOUT3 Mixer", "LINS3", "LIN3 Mixing Circuit"},
  	{"ROUT3 Mixer", "RINS3", "RIN3 Mixing Circuit"},
  
  	{"LOUT1 Mixer", "LINL4", "LIN4 Mixing Circuit"},
  	{"ROUT1 Mixer", "RINR4", "RIN4 Mixing Circuit"},
  	{"LOUT2 Mixer", "LINH4", "LIN4 Mixing Circuit"},
  	{"ROUT2 Mixer", "RINH4", "RIN4 Mixing Circuit"},
  	{"LOUT3 Mixer", "LINS4", "LIN4 Mixing Circuit"},
  	{"ROUT3 Mixer", "RINS4", "RIN4 Mixing Circuit"},
  };
  
  static int ak4671_hw_params(struct snd_pcm_substream *substream,
  		struct snd_pcm_hw_params *params,
  		struct snd_soc_dai *dai)
  {
  	struct snd_soc_codec *codec = dai->codec;
  	u8 fs;
  
  	fs = snd_soc_read(codec, AK4671_PLL_MODE_SELECT0);
  	fs &= ~AK4671_FS;
  
  	switch (params_rate(params)) {
  	case 8000:
  		fs |= AK4671_FS_8KHZ;
  		break;
  	case 12000:
  		fs |= AK4671_FS_12KHZ;
  		break;
  	case 16000:
  		fs |= AK4671_FS_16KHZ;
  		break;
  	case 24000:
  		fs |= AK4671_FS_24KHZ;
  		break;
  	case 11025:
  		fs |= AK4671_FS_11_025KHZ;
  		break;
  	case 22050:
  		fs |= AK4671_FS_22_05KHZ;
  		break;
  	case 32000:
  		fs |= AK4671_FS_32KHZ;
  		break;
  	case 44100:
  		fs |= AK4671_FS_44_1KHZ;
  		break;
  	case 48000:
  		fs |= AK4671_FS_48KHZ;
  		break;
  	default:
  		return -EINVAL;
  	}
  
  	snd_soc_write(codec, AK4671_PLL_MODE_SELECT0, fs);
  
  	return 0;
  }
  
  static int ak4671_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
  		unsigned int freq, int dir)
  {
  	struct snd_soc_codec *codec = dai->codec;
  	u8 pll;
  
  	pll = snd_soc_read(codec, AK4671_PLL_MODE_SELECT0);
  	pll &= ~AK4671_PLL;
  
  	switch (freq) {
  	case 11289600:
  		pll |= AK4671_PLL_11_2896MHZ;
  		break;
  	case 12000000:
  		pll |= AK4671_PLL_12MHZ;
  		break;
  	case 12288000:
  		pll |= AK4671_PLL_12_288MHZ;
  		break;
  	case 13000000:
  		pll |= AK4671_PLL_13MHZ;
  		break;
  	case 13500000:
  		pll |= AK4671_PLL_13_5MHZ;
  		break;
  	case 19200000:
  		pll |= AK4671_PLL_19_2MHZ;
  		break;
  	case 24000000:
  		pll |= AK4671_PLL_24MHZ;
  		break;
  	case 26000000:
  		pll |= AK4671_PLL_26MHZ;
  		break;
  	case 27000000:
  		pll |= AK4671_PLL_27MHZ;
  		break;
  	default:
  		return -EINVAL;
  	}
  
  	snd_soc_write(codec, AK4671_PLL_MODE_SELECT0, pll);
  
  	return 0;
  }
  
  static int ak4671_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
  {
  	struct snd_soc_codec *codec = dai->codec;
  	u8 mode;
  	u8 format;
  
  	/* set master/slave audio interface */
  	mode = snd_soc_read(codec, AK4671_PLL_MODE_SELECT1);
  
  	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
  	case SND_SOC_DAIFMT_CBM_CFM:
  		mode |= AK4671_M_S;
  		break;
  	case SND_SOC_DAIFMT_CBM_CFS:
  		mode &= ~(AK4671_M_S);
  		break;
  	default:
  		return -EINVAL;
  	}
  
  	/* interface format */
  	format = snd_soc_read(codec, AK4671_FORMAT_SELECT);
  	format &= ~AK4671_DIF;
  
  	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
  	case SND_SOC_DAIFMT_I2S:
  		format |= AK4671_DIF_I2S_MODE;
  		break;
  	case SND_SOC_DAIFMT_LEFT_J:
  		format |= AK4671_DIF_MSB_MODE;
  		break;
  	case SND_SOC_DAIFMT_DSP_A:
  		format |= AK4671_DIF_DSP_MODE;
  		format |= AK4671_BCKP;
  		format |= AK4671_MSBS;
  		break;
  	default:
  		return -EINVAL;
  	}
  
  	/* set mode and format */
  	snd_soc_write(codec, AK4671_PLL_MODE_SELECT1, mode);
  	snd_soc_write(codec, AK4671_FORMAT_SELECT, format);
  
  	return 0;
  }
  
  static int ak4671_set_bias_level(struct snd_soc_codec *codec,
  		enum snd_soc_bias_level level)
  {
  	switch (level) {
  	case SND_SOC_BIAS_ON:
  	case SND_SOC_BIAS_PREPARE:
  	case SND_SOC_BIAS_STANDBY:
  		snd_soc_update_bits(codec, AK4671_AD_DA_POWER_MANAGEMENT,
  				    AK4671_PMVCM, AK4671_PMVCM);
  		break;
  	case SND_SOC_BIAS_OFF:
  		snd_soc_write(codec, AK4671_AD_DA_POWER_MANAGEMENT, 0x00);
  		break;
  	}
  	return 0;
  }
  
  #define AK4671_RATES		(SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
  				SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
  				SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
  				SNDRV_PCM_RATE_48000)
  
  #define AK4671_FORMATS		SNDRV_PCM_FMTBIT_S16_LE
  
  static const struct snd_soc_dai_ops ak4671_dai_ops = {
  	.hw_params	= ak4671_hw_params,
  	.set_sysclk	= ak4671_set_dai_sysclk,
  	.set_fmt	= ak4671_set_dai_fmt,
  };
  
  static struct snd_soc_dai_driver ak4671_dai = {
  	.name = "ak4671-hifi",
  	.playback = {
  		.stream_name = "Playback",
  		.channels_min = 1,
  		.channels_max = 2,
  		.rates = AK4671_RATES,
  		.formats = AK4671_FORMATS,},
  	.capture = {
  		.stream_name = "Capture",
  		.channels_min = 1,
  		.channels_max = 2,
  		.rates = AK4671_RATES,
  		.formats = AK4671_FORMATS,},
  	.ops = &ak4671_dai_ops,
  };
  
  static struct snd_soc_codec_driver soc_codec_dev_ak4671 = {
  	.set_bias_level = ak4671_set_bias_level,
  	.controls = ak4671_snd_controls,
  	.num_controls = ARRAY_SIZE(ak4671_snd_controls),
  	.dapm_widgets = ak4671_dapm_widgets,
  	.num_dapm_widgets = ARRAY_SIZE(ak4671_dapm_widgets),
  	.dapm_routes = ak4671_intercon,
  	.num_dapm_routes = ARRAY_SIZE(ak4671_intercon),
  };
  
  static const struct regmap_config ak4671_regmap = {
  	.reg_bits = 8,
  	.val_bits = 8,
  
  	.max_register = AK4671_SAR_ADC_CONTROL,
  	.reg_defaults = ak4671_reg_defaults,
  	.num_reg_defaults = ARRAY_SIZE(ak4671_reg_defaults),
  	.cache_type = REGCACHE_RBTREE,
  };
  
  static int ak4671_i2c_probe(struct i2c_client *client,
  			    const struct i2c_device_id *id)
  {
  	struct regmap *regmap;
  	int ret;
  
  	regmap = devm_regmap_init_i2c(client, &ak4671_regmap);
  	if (IS_ERR(regmap)) {
  		ret = PTR_ERR(regmap);
  		dev_err(&client->dev, "Failed to create regmap: %d\n", ret);
  		return ret;
  	}
  
  	ret = snd_soc_register_codec(&client->dev,
  			&soc_codec_dev_ak4671, &ak4671_dai, 1);
  	return ret;
  }
  
  static int ak4671_i2c_remove(struct i2c_client *client)
  {
  	snd_soc_unregister_codec(&client->dev);
  	return 0;
  }
  
  static const struct i2c_device_id ak4671_i2c_id[] = {
  	{ "ak4671", 0 },
  	{ }
  };
  MODULE_DEVICE_TABLE(i2c, ak4671_i2c_id);
  
  static struct i2c_driver ak4671_i2c_driver = {
  	.driver = {
  		.name = "ak4671-codec",
  	},
  	.probe = ak4671_i2c_probe,
  	.remove = ak4671_i2c_remove,
  	.id_table = ak4671_i2c_id,
  };
  
  module_i2c_driver(ak4671_i2c_driver);
  
  MODULE_DESCRIPTION("ASoC AK4671 codec driver");
  MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
  MODULE_LICENSE("GPL");
  