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ak4671.c

/*
 * 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/slab.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>

#include "ak4671.h"


/* codec private data */
00027 struct ak4671_priv {
      enum snd_soc_control_type control_type;
      void *control_data;
};

/* ak4671 register cache & default register settings */
static const u8 ak4671_reg[AK4671_CACHEREGNUM] = {
      0x00, /* AK4671_AD_DA_POWER_MANAGEMENT    (0x00)      */
      0xf6, /* AK4671_PLL_MODE_SELECT0          (0x01)      */
      0x00, /* AK4671_PLL_MODE_SELECT1          (0x02)      */
      0x02, /* AK4671_FORMAT_SELECT             (0x03)      */
      0x00, /* AK4671_MIC_SIGNAL_SELECT         (0x04)      */
      0x55, /* AK4671_MIC_AMP_GAIN              (0x05)      */
      0x00, /* AK4671_MIXING_POWER_MANAGEMENT0  (0x06)      */
      0x00, /* AK4671_MIXING_POWER_MANAGEMENT1  (0x07)      */
      0xb5, /* AK4671_OUTPUT_VOLUME_CONTROL           (0x08)      */
      0x00, /* AK4671_LOUT1_SIGNAL_SELECT       (0x09)      */
      0x00, /* AK4671_ROUT1_SIGNAL_SELECT       (0x0a)      */
      0x00, /* AK4671_LOUT2_SIGNAL_SELECT       (0x0b)      */
      0x00, /* AK4671_ROUT2_SIGNAL_SELECT       (0x0c)      */
      0x00, /* AK4671_LOUT3_SIGNAL_SELECT       (0x0d)      */
      0x00, /* AK4671_ROUT3_SIGNAL_SELECT       (0x0e)      */
      0x00, /* AK4671_LOUT1_POWER_MANAGERMENT   (0x0f)      */
      0x00, /* AK4671_LOUT2_POWER_MANAGERMENT   (0x10)      */
      0x80, /* AK4671_LOUT3_POWER_MANAGERMENT   (0x11)      */
      0x91, /* AK4671_LCH_INPUT_VOLUME_CONTROL  (0x12)      */
      0x91, /* AK4671_RCH_INPUT_VOLUME_CONTROL  (0x13)      */
      0xe1, /* AK4671_ALC_REFERENCE_SELECT            (0x14)      */
      0x00, /* AK4671_DIGITAL_MIXING_CONTROL    (0x15)      */
      0x00, /* AK4671_ALC_TIMER_SELECT          (0x16)      */
      0x00, /* AK4671_ALC_MODE_CONTROL          (0x17)      */
      0x02, /* AK4671_MODE_CONTROL1             (0x18)      */
      0x01, /* AK4671_MODE_CONTROL2             (0x19)      */
      0x18, /* AK4671_LCH_OUTPUT_VOLUME_CONTROL (0x1a)      */
      0x18, /* AK4671_RCH_OUTPUT_VOLUME_CONTROL (0x1b)      */
      0x00, /* AK4671_SIDETONE_A_CONTROL        (0x1c)      */
      0x02, /* AK4671_DIGITAL_FILTER_SELECT           (0x1d)      */
      0x00, /* AK4671_FIL3_COEFFICIENT0         (0x1e)      */
      0x00, /* AK4671_FIL3_COEFFICIENT1         (0x1f)      */
      0x00, /* AK4671_FIL3_COEFFICIENT2         (0x20)      */
      0x00, /* AK4671_FIL3_COEFFICIENT3         (0x21)      */
      0x00, /* AK4671_EQ_COEFFICIENT0           (0x22)      */
      0x00, /* AK4671_EQ_COEFFICIENT1           (0x23)      */
      0x00, /* AK4671_EQ_COEFFICIENT2           (0x24)      */
      0x00, /* AK4671_EQ_COEFFICIENT3           (0x25)      */
      0x00, /* AK4671_EQ_COEFFICIENT4           (0x26)      */
      0x00, /* AK4671_EQ_COEFFICIENT5           (0x27)      */
      0xa9, /* AK4671_FIL1_COEFFICIENT0         (0x28)      */
      0x1f, /* AK4671_FIL1_COEFFICIENT1         (0x29)      */
      0xad, /* AK4671_FIL1_COEFFICIENT2         (0x2a)      */
      0x20, /* AK4671_FIL1_COEFFICIENT3         (0x2b)      */
      0x00, /* AK4671_FIL2_COEFFICIENT0         (0x2c)      */
      0x00, /* AK4671_FIL2_COEFFICIENT1         (0x2d)      */
      0x00, /* AK4671_FIL2_COEFFICIENT2         (0x2e)      */
      0x00, /* AK4671_FIL2_COEFFICIENT3         (0x2f)      */
      0x00, /* AK4671_DIGITAL_FILTER_SELECT2    (0x30)      */
      0x00, /* this register not used                 */
      0x00, /* AK4671_E1_COEFFICIENT0           (0x32)      */
      0x00, /* AK4671_E1_COEFFICIENT1           (0x33)      */
      0x00, /* AK4671_E1_COEFFICIENT2           (0x34)      */
      0x00, /* AK4671_E1_COEFFICIENT3           (0x35)      */
      0x00, /* AK4671_E1_COEFFICIENT4           (0x36)      */
      0x00, /* AK4671_E1_COEFFICIENT5           (0x37)      */
      0x00, /* AK4671_E2_COEFFICIENT0           (0x38)      */
      0x00, /* AK4671_E2_COEFFICIENT1           (0x39)      */
      0x00, /* AK4671_E2_COEFFICIENT2           (0x3a)      */
      0x00, /* AK4671_E2_COEFFICIENT3           (0x3b)      */
      0x00, /* AK4671_E2_COEFFICIENT4           (0x3c)      */
      0x00, /* AK4671_E2_COEFFICIENT5           (0x3d)      */
      0x00, /* AK4671_E3_COEFFICIENT0           (0x3e)      */
      0x00, /* AK4671_E3_COEFFICIENT1           (0x3f)      */
      0x00, /* AK4671_E3_COEFFICIENT2           (0x40)      */
      0x00, /* AK4671_E3_COEFFICIENT3           (0x41)      */
      0x00, /* AK4671_E3_COEFFICIENT4           (0x42)      */
      0x00, /* AK4671_E3_COEFFICIENT5           (0x43)      */
      0x00, /* AK4671_E4_COEFFICIENT0           (0x44)      */
      0x00, /* AK4671_E4_COEFFICIENT1           (0x45)      */
      0x00, /* AK4671_E4_COEFFICIENT2           (0x46)      */
      0x00, /* AK4671_E4_COEFFICIENT3           (0x47)      */
      0x00, /* AK4671_E4_COEFFICIENT4           (0x48)      */
      0x00, /* AK4671_E4_COEFFICIENT5           (0x49)      */
      0x00, /* AK4671_E5_COEFFICIENT0           (0x4a)      */
      0x00, /* AK4671_E5_COEFFICIENT1           (0x4b)      */
      0x00, /* AK4671_E5_COEFFICIENT2           (0x4c)      */
      0x00, /* AK4671_E5_COEFFICIENT3           (0x4d)      */
      0x00, /* AK4671_E5_COEFFICIENT4           (0x4e)      */
      0x00, /* AK4671_E5_COEFFICIENT5           (0x4f)      */
      0x88, /* AK4671_EQ_CONTROL_250HZ_100HZ    (0x50)      */
      0x88, /* AK4671_EQ_CONTROL_3500HZ_1KHZ    (0x51)      */
      0x08, /* AK4671_EQ_CONTRO_10KHZ           (0x52)      */
      0x00, /* AK4671_PCM_IF_CONTROL0           (0x53)      */
      0x00, /* AK4671_PCM_IF_CONTROL1           (0x54)      */
      0x00, /* AK4671_PCM_IF_CONTROL2           (0x55)      */
      0x18, /* AK4671_DIGITAL_VOLUME_B_CONTROL  (0x56)      */
      0x18, /* AK4671_DIGITAL_VOLUME_C_CONTROL  (0x57)      */
      0x00, /* AK4671_SIDETONE_VOLUME_CONTROL   (0x58)      */
      0x00, /* AK4671_DIGITAL_MIXING_CONTROL2   (0x59)      */
      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 = w->codec;
      u8 reg;

      switch (event) {
      case SND_SOC_DAPM_POST_PMU:
            reg = snd_soc_read(codec, AK4671_LOUT2_POWER_MANAGERMENT);
            reg |= AK4671_MUTEN;
            snd_soc_write(codec, AK4671_LOUT2_POWER_MANAGERMENT, reg);
            break;
      case SND_SOC_DAPM_PRE_PMD:
            reg = snd_soc_read(codec, AK4671_LOUT2_POWER_MANAGERMENT);
            reg &= ~AK4671_MUTEN;
            snd_soc_write(codec, AK4671_LOUT2_POWER_MANAGERMENT, reg);
            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 const struct soc_enum ak4671_lin_mux_enum =
      SOC_ENUM_SINGLE(AK4671_MIC_SIGNAL_SELECT, 0,
                  ARRAY_SIZE(ak4671_lin_mux_texts),
                  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 const struct soc_enum ak4671_rin_mux_enum =
      SOC_ENUM_SINGLE(AK4671_MIC_SIGNAL_SELECT, 2,
                  ARRAY_SIZE(ak4671_rin_mux_texts),
                  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 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_add_widgets(struct snd_soc_codec *codec)
{
      struct snd_soc_dapm_context *dapm = &codec->dapm;

      snd_soc_dapm_new_controls(dapm, ak4671_dapm_widgets,
                          ARRAY_SIZE(ak4671_dapm_widgets));
      snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));

      return 0;
}

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)
{
      u8 reg;

      switch (level) {
      case SND_SOC_BIAS_ON:
      case SND_SOC_BIAS_PREPARE:
      case SND_SOC_BIAS_STANDBY:
            reg = snd_soc_read(codec, AK4671_AD_DA_POWER_MANAGEMENT);
            snd_soc_write(codec, AK4671_AD_DA_POWER_MANAGEMENT,
                        reg | AK4671_PMVCM);
            break;
      case SND_SOC_BIAS_OFF:
            snd_soc_write(codec, AK4671_AD_DA_POWER_MANAGEMENT, 0x00);
            break;
      }
      codec->dapm.bias_level = level;
      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 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 int ak4671_probe(struct snd_soc_codec *codec)
{
      struct ak4671_priv *ak4671 = snd_soc_codec_get_drvdata(codec);
      int ret;

      codec->hw_write = (hw_write_t)i2c_master_send;

      ret = snd_soc_codec_set_cache_io(codec, 8, 8, ak4671->control_type);
      if (ret < 0) {
            dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
            return ret;
      }

      snd_soc_add_controls(codec, ak4671_snd_controls,
                       ARRAY_SIZE(ak4671_snd_controls));
      ak4671_add_widgets(codec);

      ak4671_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

      return ret;
}

static int ak4671_remove(struct snd_soc_codec *codec)
{
      ak4671_set_bias_level(codec, SND_SOC_BIAS_OFF);
      return 0;
}

static struct snd_soc_codec_driver soc_codec_dev_ak4671 = {
      .probe = ak4671_probe,
      .remove = ak4671_remove,
      .set_bias_level = ak4671_set_bias_level,
      .reg_cache_size = AK4671_CACHEREGNUM,
      .reg_word_size = sizeof(u8),
      .reg_cache_default = ak4671_reg,
};

static int __devinit ak4671_i2c_probe(struct i2c_client *client,
            const struct i2c_device_id *id)
{
      struct ak4671_priv *ak4671;
      int ret;

      ak4671 = kzalloc(sizeof(struct ak4671_priv), GFP_KERNEL);
      if (ak4671 == NULL)
            return -ENOMEM;

      i2c_set_clientdata(client, ak4671);
      ak4671->control_data = client;
      ak4671->control_type = SND_SOC_I2C;

      ret = snd_soc_register_codec(&client->dev,
                  &soc_codec_dev_ak4671, &ak4671_dai, 1);
      if (ret < 0)
            kfree(ak4671);
      return ret;
}

static __devexit int ak4671_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 ak4671_i2c_id[] = {
      { "ak4671", 0 },
      { }
};
MODULE_DEVICE_TABLE(i2c, ak4671_i2c_id);

static struct i2c_driver ak4671_i2c_driver = {
      .driver = {
            .name = "ak4671-codec",
            .owner = THIS_MODULE,
      },
      .probe = ak4671_i2c_probe,
      .remove = __devexit_p(ak4671_i2c_remove),
      .id_table = ak4671_i2c_id,
};

static int __init ak4671_modinit(void)
{
      return i2c_add_driver(&ak4671_i2c_driver);
}
module_init(ak4671_modinit);

static void __exit ak4671_exit(void)
{
      i2c_del_driver(&ak4671_i2c_driver);
}
module_exit(ak4671_exit);

MODULE_DESCRIPTION("ASoC AK4671 codec driver");
MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
MODULE_LICENSE("GPL");

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