Quelle  rk3308_codec.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Rockchip RK3308 internal audio codec driver
 *
 * Copyright (c) 2018, Fuzhou Rockchip Electronics Co., Ltd All rights reserved.
 * Copyright (c) 2024, Vivax-Metrotech Ltd
 */

#include <linux/clk.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/util_macros.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>

#include "rk3308_codec.h"

#define ADC_LR_GROUP_MAX  4

#define GRF_CHIP_ID   0x800

enum {
 ACODEC_VERSION_A = 'A',
 ACODEC_VERSION_B,
 ACODEC_VERSION_C,
};

struct rk3308_codec_priv {
 const struct device *dev;
 struct regmap *regmap;
 struct regmap *grf;
 struct reset_control *reset;
 struct clk *hclk;
 struct clk *mclk_rx;
 struct clk *mclk_tx;
 struct snd_soc_component *component;
 unsigned char codec_ver;
};

static struct clk_bulk_data rk3308_codec_clocks[] = {
 { .id = "hclk" },
 { .id = "mclk_rx" },
 { .id = "mclk_tx" },
};

static const DECLARE_TLV_DB_SCALE(rk3308_codec_adc_alc_gain_tlv,   -1800, 150, 0);
static const DECLARE_TLV_DB_SCALE(rk3308_codec_dac_hpout_gain_tlv, -3900, 150, 0);
static const DECLARE_TLV_DB_SCALE(rk3308_codec_dac_hpmix_gain_tlv,  -600, 600, 0);

static const DECLARE_TLV_DB_RANGE(rk3308_codec_dac_lineout_gain_tlv,
 0, 0, TLV_DB_SCALE_ITEM(-600, 0, 0),
 1, 1, TLV_DB_SCALE_ITEM(-300, 0, 0),
 2, 2, TLV_DB_SCALE_ITEM(-150, 0, 0),
 3, 3, TLV_DB_SCALE_ITEM(0,    0, 0),
);

static const char * const rk3308_codec_hpf_cutoff_text[] = {
 "20 Hz", "245 Hz", "612 Hz"
};

static SOC_ENUM_SINGLE_DECL(rk3308_codec_hpf_cutoff_enum12, RK3308_ADC_DIG_CON04(0), 0,
       rk3308_codec_hpf_cutoff_text);
static SOC_ENUM_SINGLE_DECL(rk3308_codec_hpf_cutoff_enum34, RK3308_ADC_DIG_CON04(1), 0,
       rk3308_codec_hpf_cutoff_text);
static SOC_ENUM_SINGLE_DECL(rk3308_codec_hpf_cutoff_enum56, RK3308_ADC_DIG_CON04(2), 0,
       rk3308_codec_hpf_cutoff_text);
static SOC_ENUM_SINGLE_DECL(rk3308_codec_hpf_cutoff_enum78, RK3308_ADC_DIG_CON04(3), 0,
       rk3308_codec_hpf_cutoff_text);

static const struct snd_kcontrol_new rk3308_codec_controls[] = {
 /* Despite the register names, these set the gain when AGC is OFF */
 SOC_SINGLE_RANGE_TLV("MIC1 Capture Volume",
        RK3308_ADC_ANA_CON03(0),
        RK3308_ADC_CH1_ALC_GAIN_SFT,
        RK3308_ADC_CH1_ALC_GAIN_MIN,
        RK3308_ADC_CH1_ALC_GAIN_MAX,
        0, rk3308_codec_adc_alc_gain_tlv),
 SOC_SINGLE_RANGE_TLV("MIC2 Capture Volume",
        RK3308_ADC_ANA_CON04(0),
        RK3308_ADC_CH2_ALC_GAIN_SFT,
        RK3308_ADC_CH2_ALC_GAIN_MIN,
        RK3308_ADC_CH2_ALC_GAIN_MAX,
        0, rk3308_codec_adc_alc_gain_tlv),
 SOC_SINGLE_RANGE_TLV("MIC3 Capture Volume",
        RK3308_ADC_ANA_CON03(1),
        RK3308_ADC_CH1_ALC_GAIN_SFT,
        RK3308_ADC_CH1_ALC_GAIN_MIN,
        RK3308_ADC_CH1_ALC_GAIN_MAX,
        0, rk3308_codec_adc_alc_gain_tlv),
 SOC_SINGLE_RANGE_TLV("MIC4 Capture Volume",
        RK3308_ADC_ANA_CON04(1),
        RK3308_ADC_CH2_ALC_GAIN_SFT,
        RK3308_ADC_CH2_ALC_GAIN_MIN,
        RK3308_ADC_CH2_ALC_GAIN_MAX,
        0, rk3308_codec_adc_alc_gain_tlv),
 SOC_SINGLE_RANGE_TLV("MIC5 Capture Volume",
        RK3308_ADC_ANA_CON03(2),
        RK3308_ADC_CH1_ALC_GAIN_SFT,
        RK3308_ADC_CH1_ALC_GAIN_MIN,
        RK3308_ADC_CH1_ALC_GAIN_MAX,
        0, rk3308_codec_adc_alc_gain_tlv),
 SOC_SINGLE_RANGE_TLV("MIC6 Capture Volume",
        RK3308_ADC_ANA_CON04(2),
        RK3308_ADC_CH2_ALC_GAIN_SFT,
        RK3308_ADC_CH2_ALC_GAIN_MIN,
        RK3308_ADC_CH2_ALC_GAIN_MAX,
        0, rk3308_codec_adc_alc_gain_tlv),
 SOC_SINGLE_RANGE_TLV("MIC7 Capture Volume",
        RK3308_ADC_ANA_CON03(3),
        RK3308_ADC_CH1_ALC_GAIN_SFT,
        RK3308_ADC_CH1_ALC_GAIN_MIN,
        RK3308_ADC_CH1_ALC_GAIN_MAX,
        0, rk3308_codec_adc_alc_gain_tlv),
 SOC_SINGLE_RANGE_TLV("MIC8 Capture Volume",
        RK3308_ADC_ANA_CON04(3),
        RK3308_ADC_CH2_ALC_GAIN_SFT,
        RK3308_ADC_CH2_ALC_GAIN_MIN,
        RK3308_ADC_CH2_ALC_GAIN_MAX,
        0, rk3308_codec_adc_alc_gain_tlv),

 SOC_SINGLE("MIC1 Capture Switch", RK3308_ADC_ANA_CON00(0), 3, 1, 0),
 SOC_SINGLE("MIC2 Capture Switch", RK3308_ADC_ANA_CON00(0), 7, 1, 0),
 SOC_SINGLE("MIC3 Capture Switch", RK3308_ADC_ANA_CON00(1), 3, 1, 0),
 SOC_SINGLE("MIC4 Capture Switch", RK3308_ADC_ANA_CON00(1), 7, 1, 0),
 SOC_SINGLE("MIC5 Capture Switch", RK3308_ADC_ANA_CON00(2), 3, 1, 0),
 SOC_SINGLE("MIC6 Capture Switch", RK3308_ADC_ANA_CON00(2), 7, 1, 0),
 SOC_SINGLE("MIC7 Capture Switch", RK3308_ADC_ANA_CON00(3), 3, 1, 0),
 SOC_SINGLE("MIC8 Capture Switch", RK3308_ADC_ANA_CON00(3), 7, 1, 0),

 SOC_SINGLE("MIC12 HPF Capture Switch", RK3308_ADC_DIG_CON04(0), 2, 1, 1),
 SOC_SINGLE("MIC34 HPF Capture Switch", RK3308_ADC_DIG_CON04(1), 2, 1, 1),
 SOC_SINGLE("MIC56 HPF Capture Switch", RK3308_ADC_DIG_CON04(2), 2, 1, 1),
 SOC_SINGLE("MIC78 HPF Capture Switch", RK3308_ADC_DIG_CON04(3), 2, 1, 1),

 SOC_ENUM("MIC12 HPF Cutoff", rk3308_codec_hpf_cutoff_enum12),
 SOC_ENUM("MIC34 HPF Cutoff", rk3308_codec_hpf_cutoff_enum34),
 SOC_ENUM("MIC56 HPF Cutoff", rk3308_codec_hpf_cutoff_enum56),
 SOC_ENUM("MIC78 HPF Cutoff", rk3308_codec_hpf_cutoff_enum78),

 SOC_DOUBLE_TLV("Line Out Playback Volume",
         RK3308_DAC_ANA_CON04,
         RK3308_DAC_L_LINEOUT_GAIN_SFT,
         RK3308_DAC_R_LINEOUT_GAIN_SFT,
         RK3308_DAC_x_LINEOUT_GAIN_MAX,
         0, rk3308_codec_dac_lineout_gain_tlv),
 SOC_DOUBLE("Line Out Playback Switch",
     RK3308_DAC_ANA_CON04,
     RK3308_DAC_L_LINEOUT_MUTE_SFT,
     RK3308_DAC_R_LINEOUT_MUTE_SFT, 1, 0),
 SOC_DOUBLE_R_TLV("Headphone Playback Volume",
    RK3308_DAC_ANA_CON05,
    RK3308_DAC_ANA_CON06,
    RK3308_DAC_x_HPOUT_GAIN_SFT,
    RK3308_DAC_x_HPOUT_GAIN_MAX,
    0, rk3308_codec_dac_hpout_gain_tlv),
 SOC_DOUBLE("Headphone Playback Switch",
     RK3308_DAC_ANA_CON03,
     RK3308_DAC_L_HPOUT_MUTE_SFT,
     RK3308_DAC_R_HPOUT_MUTE_SFT, 1, 0),
 SOC_DOUBLE_RANGE_TLV("DAC HPMIX Playback Volume",
        RK3308_DAC_ANA_CON12,
        RK3308_DAC_L_HPMIX_GAIN_SFT,
        RK3308_DAC_R_HPMIX_GAIN_SFT,
        1, 2, 0, rk3308_codec_dac_hpmix_gain_tlv),
};

static int rk3308_codec_pop_sound_set(struct snd_soc_dapm_widget *w,
          struct snd_kcontrol *kcontrol,
          int event)
{
 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
 struct rk3308_codec_priv *rk3308 = snd_soc_component_get_drvdata(component);
 unsigned int val = (event == SND_SOC_DAPM_POST_PMU) ?
  RK3308_DAC_HPOUT_POP_SOUND_x_WORK :
  RK3308_DAC_HPOUT_POP_SOUND_x_INIT;
 unsigned int mask = RK3308_DAC_HPOUT_POP_SOUND_x_MSK;

 regmap_update_bits(rk3308->regmap, RK3308_DAC_ANA_CON01,
      mask << w->shift, val << w->shift);

 return 0;
}

static const struct snd_soc_dapm_widget rk3308_codec_dapm_widgets[] = {
 SND_SOC_DAPM_INPUT("MIC1"),
 SND_SOC_DAPM_INPUT("MIC2"),
 SND_SOC_DAPM_INPUT("MIC3"),
 SND_SOC_DAPM_INPUT("MIC4"),
 SND_SOC_DAPM_INPUT("MIC5"),
 SND_SOC_DAPM_INPUT("MIC6"),
 SND_SOC_DAPM_INPUT("MIC7"),
 SND_SOC_DAPM_INPUT("MIC8"),

 SND_SOC_DAPM_SUPPLY("ADC_CURRENT_EN12", RK3308_ADC_ANA_CON06(0), 0, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ADC_CURRENT_EN34", RK3308_ADC_ANA_CON06(1), 0, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ADC_CURRENT_EN56", RK3308_ADC_ANA_CON06(2), 0, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ADC_CURRENT_EN78", RK3308_ADC_ANA_CON06(3), 0, 0, NULL, 0),

 SND_SOC_DAPM_REG(snd_soc_dapm_mic, "MIC1_EN", RK3308_ADC_ANA_CON00(0), 1, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_mic, "MIC2_EN", RK3308_ADC_ANA_CON00(0), 5, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_mic, "MIC3_EN", RK3308_ADC_ANA_CON00(1), 1, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_mic, "MIC4_EN", RK3308_ADC_ANA_CON00(1), 5, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_mic, "MIC5_EN", RK3308_ADC_ANA_CON00(2), 1, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_mic, "MIC6_EN", RK3308_ADC_ANA_CON00(2), 5, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_mic, "MIC7_EN", RK3308_ADC_ANA_CON00(3), 1, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_mic, "MIC8_EN", RK3308_ADC_ANA_CON00(3), 5, 1, 1, 0),

 SND_SOC_DAPM_REG(snd_soc_dapm_mic, "MIC1_WORK", RK3308_ADC_ANA_CON00(0), 2, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_mic, "MIC2_WORK", RK3308_ADC_ANA_CON00(0), 6, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_mic, "MIC3_WORK", RK3308_ADC_ANA_CON00(1), 2, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_mic, "MIC4_WORK", RK3308_ADC_ANA_CON00(1), 6, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_mic, "MIC5_WORK", RK3308_ADC_ANA_CON00(2), 2, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_mic, "MIC6_WORK", RK3308_ADC_ANA_CON00(2), 6, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_mic, "MIC7_WORK", RK3308_ADC_ANA_CON00(3), 2, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_mic, "MIC8_WORK", RK3308_ADC_ANA_CON00(3), 6, 1, 1, 0),

 /*
 * In theory MIC1 and MIC2 can switch to LINE IN, but this is not
 * supported so all we can do is enabling the MIC input.
 */
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "CH1_IN_SEL", RK3308_ADC_ANA_CON07(0), 4, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "CH2_IN_SEL", RK3308_ADC_ANA_CON07(0), 6, 1, 1, 0),

 SND_SOC_DAPM_SUPPLY("ADC1_BUF_REF_EN", RK3308_ADC_ANA_CON00(0), 0, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ADC2_BUF_REF_EN", RK3308_ADC_ANA_CON00(0), 4, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ADC3_BUF_REF_EN", RK3308_ADC_ANA_CON00(1), 0, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ADC4_BUF_REF_EN", RK3308_ADC_ANA_CON00(1), 4, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ADC5_BUF_REF_EN", RK3308_ADC_ANA_CON00(2), 0, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ADC6_BUF_REF_EN", RK3308_ADC_ANA_CON00(2), 4, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ADC7_BUF_REF_EN", RK3308_ADC_ANA_CON00(3), 0, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ADC8_BUF_REF_EN", RK3308_ADC_ANA_CON00(3), 4, 0, NULL, 0),

 SND_SOC_DAPM_SUPPLY("ADC_MCLK_GATE", RK3308_GLB_CON, 5, 1, NULL, 0),

 SND_SOC_DAPM_SUPPLY("ADC1_CLK_EN", RK3308_ADC_ANA_CON05(0), 0, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ADC2_CLK_EN", RK3308_ADC_ANA_CON05(0), 4, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ADC3_CLK_EN", RK3308_ADC_ANA_CON05(1), 0, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ADC4_CLK_EN", RK3308_ADC_ANA_CON05(1), 4, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ADC5_CLK_EN", RK3308_ADC_ANA_CON05(2), 0, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ADC6_CLK_EN", RK3308_ADC_ANA_CON05(2), 4, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ADC7_CLK_EN", RK3308_ADC_ANA_CON05(3), 0, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("ADC8_CLK_EN", RK3308_ADC_ANA_CON05(3), 4, 0, NULL, 0),

 /* The "ALC" name from the TRM is misleading, these are needed even without ALC/AGC */
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ALC1_EN", RK3308_ADC_ANA_CON02(0), 0, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ALC2_EN", RK3308_ADC_ANA_CON02(0), 4, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ALC3_EN", RK3308_ADC_ANA_CON02(1), 0, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ALC4_EN", RK3308_ADC_ANA_CON02(1), 4, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ALC5_EN", RK3308_ADC_ANA_CON02(2), 0, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ALC6_EN", RK3308_ADC_ANA_CON02(2), 4, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ALC7_EN", RK3308_ADC_ANA_CON02(3), 0, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ALC8_EN", RK3308_ADC_ANA_CON02(3), 4, 1, 1, 0),

 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ADC1_EN", RK3308_ADC_ANA_CON05(0), 1, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ADC2_EN", RK3308_ADC_ANA_CON05(0), 5, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ADC3_EN", RK3308_ADC_ANA_CON05(1), 1, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ADC4_EN", RK3308_ADC_ANA_CON05(1), 5, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ADC5_EN", RK3308_ADC_ANA_CON05(2), 1, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ADC6_EN", RK3308_ADC_ANA_CON05(2), 5, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ADC7_EN", RK3308_ADC_ANA_CON05(3), 1, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ADC8_EN", RK3308_ADC_ANA_CON05(3), 5, 1, 1, 0),

 SND_SOC_DAPM_ADC("ADC1_WORK", "Capture", RK3308_ADC_ANA_CON05(0), 2, 0),
 SND_SOC_DAPM_ADC("ADC2_WORK", "Capture", RK3308_ADC_ANA_CON05(0), 6, 0),
 SND_SOC_DAPM_ADC("ADC3_WORK", "Capture", RK3308_ADC_ANA_CON05(1), 2, 0),
 SND_SOC_DAPM_ADC("ADC4_WORK", "Capture", RK3308_ADC_ANA_CON05(1), 6, 0),
 SND_SOC_DAPM_ADC("ADC5_WORK", "Capture", RK3308_ADC_ANA_CON05(2), 2, 0),
 SND_SOC_DAPM_ADC("ADC6_WORK", "Capture", RK3308_ADC_ANA_CON05(2), 6, 0),
 SND_SOC_DAPM_ADC("ADC7_WORK", "Capture", RK3308_ADC_ANA_CON05(3), 2, 0),
 SND_SOC_DAPM_ADC("ADC8_WORK", "Capture", RK3308_ADC_ANA_CON05(3), 6, 0),

 /* The "ALC" name from the TRM is misleading, these are needed even without ALC/AGC */
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ALC1_WORK", RK3308_ADC_ANA_CON02(0), 1, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ALC2_WORK", RK3308_ADC_ANA_CON02(0), 5, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ALC3_WORK", RK3308_ADC_ANA_CON02(1), 1, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ALC4_WORK", RK3308_ADC_ANA_CON02(1), 5, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ALC5_WORK", RK3308_ADC_ANA_CON02(2), 1, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ALC6_WORK", RK3308_ADC_ANA_CON02(2), 5, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ALC7_WORK", RK3308_ADC_ANA_CON02(3), 1, 1, 1, 0),
 SND_SOC_DAPM_REG(snd_soc_dapm_adc, "ALC8_WORK", RK3308_ADC_ANA_CON02(3), 5, 1, 1, 0),

 SND_SOC_DAPM_SUPPLY("MICBIAS Current", RK3308_ADC_ANA_CON08(0), 4, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("MICBIAS1", RK3308_ADC_ANA_CON07(1), 3, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("MICBIAS2", RK3308_ADC_ANA_CON07(2), 3, 0, NULL, 0),

 SND_SOC_DAPM_OUT_DRV("DAC_L_HPMIX_EN",   RK3308_DAC_ANA_CON13, 0, 0, NULL, 0),
 SND_SOC_DAPM_OUT_DRV("DAC_R_HPMIX_EN",   RK3308_DAC_ANA_CON13, 4, 0, NULL, 0),
 SND_SOC_DAPM_OUT_DRV("DAC_L_HPMIX_WORK", RK3308_DAC_ANA_CON13, 1, 0, NULL, 0),
 SND_SOC_DAPM_OUT_DRV("DAC_R_HPMIX_WORK", RK3308_DAC_ANA_CON13, 5, 0, NULL, 0),
 /* HPMIX is not actually acting as a mixer as the only supported input is I2S */
 SND_SOC_DAPM_OUT_DRV("DAC_L_HPMIX_SEL",  RK3308_DAC_ANA_CON12, 2, 0, NULL, 0),
 SND_SOC_DAPM_OUT_DRV("DAC_R_HPMIX_SEL",  RK3308_DAC_ANA_CON12, 6, 0, NULL, 0),
 SND_SOC_DAPM_MIXER("DAC HPMIX Left",     RK3308_DAC_ANA_CON13, 2, 0, NULL, 0),
 SND_SOC_DAPM_MIXER("DAC HPMIX Right",    RK3308_DAC_ANA_CON13, 6, 0, NULL, 0),

 SND_SOC_DAPM_SUPPLY("DAC_MCLK_GATE", RK3308_GLB_CON, 4, 1, NULL, 0),

 SND_SOC_DAPM_SUPPLY("DAC_CURRENT_EN", RK3308_DAC_ANA_CON00, 0, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("DAC_L_REF_EN",   RK3308_DAC_ANA_CON02, 0, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("DAC_R_REF_EN",   RK3308_DAC_ANA_CON02, 4, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("DAC_L_CLK_EN",   RK3308_DAC_ANA_CON02, 1, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("DAC_R_CLK_EN",   RK3308_DAC_ANA_CON02, 5, 0, NULL, 0),
 SND_SOC_DAPM_DAC("DAC_L_DAC_WORK", NULL, RK3308_DAC_ANA_CON02, 3, 0),
 SND_SOC_DAPM_DAC("DAC_R_DAC_WORK", NULL, RK3308_DAC_ANA_CON02, 7, 0),

 SND_SOC_DAPM_SUPPLY("DAC_BUF_REF_L", RK3308_DAC_ANA_CON01, 2, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY("DAC_BUF_REF_R", RK3308_DAC_ANA_CON01, 6, 0, NULL, 0),
 SND_SOC_DAPM_OUT_DRV_E("HPOUT_POP_SOUND_L", SND_SOC_NOPM, 0, 0, NULL, 0,
          rk3308_codec_pop_sound_set,
          SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 SND_SOC_DAPM_OUT_DRV_E("HPOUT_POP_SOUND_R", SND_SOC_NOPM, 4, 0, NULL, 0,
          rk3308_codec_pop_sound_set,
          SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 SND_SOC_DAPM_OUT_DRV("L_HPOUT_EN", RK3308_DAC_ANA_CON03, 1, 0, NULL, 0),
 SND_SOC_DAPM_OUT_DRV("R_HPOUT_EN", RK3308_DAC_ANA_CON03, 5, 0, NULL, 0),
 SND_SOC_DAPM_OUT_DRV("L_HPOUT_WORK", RK3308_DAC_ANA_CON03, 2, 0, NULL, 0),
 SND_SOC_DAPM_OUT_DRV("R_HPOUT_WORK", RK3308_DAC_ANA_CON03, 6, 0, NULL, 0),
 SND_SOC_DAPM_OUTPUT("HPOUT_L"),
 SND_SOC_DAPM_OUTPUT("HPOUT_R"),

 SND_SOC_DAPM_OUT_DRV("L_LINEOUT_EN", RK3308_DAC_ANA_CON04, 0, 0, NULL, 0),
 SND_SOC_DAPM_OUT_DRV("R_LINEOUT_EN", RK3308_DAC_ANA_CON04, 4, 0, NULL, 0),
 SND_SOC_DAPM_OUTPUT("LINEOUT_L"),
 SND_SOC_DAPM_OUTPUT("LINEOUT_R"),
};

static const struct snd_soc_dapm_route rk3308_codec_dapm_routes[] = {
 { "MICBIAS1", NULL, "MICBIAS Current" },
 { "MICBIAS2", NULL, "MICBIAS Current" },

 { "MIC1_EN", NULL, "MIC1" },
 { "MIC2_EN", NULL, "MIC2" },
 { "MIC3_EN", NULL, "MIC3" },
 { "MIC4_EN", NULL, "MIC4" },
 { "MIC5_EN", NULL, "MIC5" },
 { "MIC6_EN", NULL, "MIC6" },
 { "MIC7_EN", NULL, "MIC7" },
 { "MIC8_EN", NULL, "MIC8" },

 { "MIC1_WORK", NULL, "MIC1_EN" },
 { "MIC2_WORK", NULL, "MIC2_EN" },
 { "MIC3_WORK", NULL, "MIC3_EN" },
 { "MIC4_WORK", NULL, "MIC4_EN" },
 { "MIC5_WORK", NULL, "MIC5_EN" },
 { "MIC6_WORK", NULL, "MIC6_EN" },
 { "MIC7_WORK", NULL, "MIC7_EN" },
 { "MIC8_WORK", NULL, "MIC8_EN" },

 { "CH1_IN_SEL", NULL, "MIC1_WORK" },
 { "CH2_IN_SEL", NULL, "MIC2_WORK" },

 { "ALC1_EN", NULL, "CH1_IN_SEL" },
 { "ALC2_EN", NULL, "CH2_IN_SEL" },
 { "ALC3_EN", NULL, "MIC3_WORK" },
 { "ALC4_EN", NULL, "MIC4_WORK" },
 { "ALC5_EN", NULL, "MIC5_WORK" },
 { "ALC6_EN", NULL, "MIC6_WORK" },
 { "ALC7_EN", NULL, "MIC7_WORK" },
 { "ALC8_EN", NULL, "MIC8_WORK" },

 { "ADC1_EN", NULL, "ALC1_EN" },
 { "ADC2_EN", NULL, "ALC2_EN" },
 { "ADC3_EN", NULL, "ALC3_EN" },
 { "ADC4_EN", NULL, "ALC4_EN" },
 { "ADC5_EN", NULL, "ALC5_EN" },
 { "ADC6_EN", NULL, "ALC6_EN" },
 { "ADC7_EN", NULL, "ALC7_EN" },
 { "ADC8_EN", NULL, "ALC8_EN" },

 { "ADC1_WORK", NULL, "ADC1_EN" },
 { "ADC2_WORK", NULL, "ADC2_EN" },
 { "ADC3_WORK", NULL, "ADC3_EN" },
 { "ADC4_WORK", NULL, "ADC4_EN" },
 { "ADC5_WORK", NULL, "ADC5_EN" },
 { "ADC6_WORK", NULL, "ADC6_EN" },
 { "ADC7_WORK", NULL, "ADC7_EN" },
 { "ADC8_WORK", NULL, "ADC8_EN" },

 { "ADC1_BUF_REF_EN", NULL, "ADC_CURRENT_EN12" },
 { "ADC2_BUF_REF_EN", NULL, "ADC_CURRENT_EN12" },
 { "ADC3_BUF_REF_EN", NULL, "ADC_CURRENT_EN34" },
 { "ADC4_BUF_REF_EN", NULL, "ADC_CURRENT_EN34" },
 { "ADC5_BUF_REF_EN", NULL, "ADC_CURRENT_EN56" },
 { "ADC6_BUF_REF_EN", NULL, "ADC_CURRENT_EN56" },
 { "ADC7_BUF_REF_EN", NULL, "ADC_CURRENT_EN78" },
 { "ADC8_BUF_REF_EN", NULL, "ADC_CURRENT_EN78" },

 { "ADC1_WORK", NULL, "ADC1_BUF_REF_EN" },
 { "ADC2_WORK", NULL, "ADC2_BUF_REF_EN" },
 { "ADC3_WORK", NULL, "ADC3_BUF_REF_EN" },
 { "ADC4_WORK", NULL, "ADC4_BUF_REF_EN" },
 { "ADC5_WORK", NULL, "ADC5_BUF_REF_EN" },
 { "ADC6_WORK", NULL, "ADC6_BUF_REF_EN" },
 { "ADC7_WORK", NULL, "ADC7_BUF_REF_EN" },
 { "ADC8_WORK", NULL, "ADC8_BUF_REF_EN" },

 { "ADC1_CLK_EN", NULL, "ADC_MCLK_GATE" },
 { "ADC2_CLK_EN", NULL, "ADC_MCLK_GATE" },
 { "ADC3_CLK_EN", NULL, "ADC_MCLK_GATE" },
 { "ADC4_CLK_EN", NULL, "ADC_MCLK_GATE" },
 { "ADC5_CLK_EN", NULL, "ADC_MCLK_GATE" },
 { "ADC6_CLK_EN", NULL, "ADC_MCLK_GATE" },
 { "ADC7_CLK_EN", NULL, "ADC_MCLK_GATE" },
 { "ADC8_CLK_EN", NULL, "ADC_MCLK_GATE" },

 { "ADC1_WORK", NULL, "ADC1_CLK_EN" },
 { "ADC2_WORK", NULL, "ADC2_CLK_EN" },
 { "ADC3_WORK", NULL, "ADC3_CLK_EN" },
 { "ADC4_WORK", NULL, "ADC4_CLK_EN" },
 { "ADC5_WORK", NULL, "ADC5_CLK_EN" },
 { "ADC6_WORK", NULL, "ADC6_CLK_EN" },
 { "ADC7_WORK", NULL, "ADC7_CLK_EN" },
 { "ADC8_WORK", NULL, "ADC8_CLK_EN" },

 { "ALC1_WORK", NULL, "ADC1_WORK" },
 { "ALC2_WORK", NULL, "ADC2_WORK" },
 { "ALC3_WORK", NULL, "ADC3_WORK" },
 { "ALC4_WORK", NULL, "ADC4_WORK" },
 { "ALC5_WORK", NULL, "ADC5_WORK" },
 { "ALC6_WORK", NULL, "ADC6_WORK" },
 { "ALC7_WORK", NULL, "ADC7_WORK" },
 { "ALC8_WORK", NULL, "ADC8_WORK" },

 { "HiFi Capture", NULL, "ALC1_WORK" },
 { "HiFi Capture", NULL, "ALC2_WORK" },
 { "HiFi Capture", NULL, "ALC3_WORK" },
 { "HiFi Capture", NULL, "ALC4_WORK" },
 { "HiFi Capture", NULL, "ALC5_WORK" },
 { "HiFi Capture", NULL, "ALC6_WORK" },
 { "HiFi Capture", NULL, "ALC7_WORK" },
 { "HiFi Capture", NULL, "ALC8_WORK" },

 { "DAC_L_HPMIX_EN", NULL, "HiFi Playback" },
 { "DAC_R_HPMIX_EN", NULL, "HiFi Playback" },
 { "DAC_L_HPMIX_WORK", NULL, "DAC_L_HPMIX_EN" },
 { "DAC_R_HPMIX_WORK", NULL, "DAC_R_HPMIX_EN" },
 { "DAC HPMIX Left",  NULL, "DAC_L_HPMIX_WORK" },
 { "DAC HPMIX Right", NULL, "DAC_R_HPMIX_WORK" },

 { "DAC_L_DAC_WORK", NULL, "DAC HPMIX Left"  },
 { "DAC_R_DAC_WORK", NULL, "DAC HPMIX Right" },

 { "DAC_L_REF_EN", NULL, "DAC_CURRENT_EN" },
 { "DAC_R_REF_EN", NULL, "DAC_CURRENT_EN" },
 { "DAC_L_CLK_EN", NULL, "DAC_L_REF_EN" },
 { "DAC_R_CLK_EN", NULL, "DAC_R_REF_EN" },
 { "DAC_L_CLK_EN", NULL, "DAC_MCLK_GATE" },
 { "DAC_R_CLK_EN", NULL, "DAC_MCLK_GATE" },
 { "DAC_L_DAC_WORK", NULL, "DAC_L_CLK_EN" },
 { "DAC_R_DAC_WORK", NULL, "DAC_R_CLK_EN" },
 { "DAC_L_HPMIX_SEL", NULL, "DAC_L_DAC_WORK" },
 { "DAC_R_HPMIX_SEL", NULL, "DAC_R_DAC_WORK" },

 { "HPOUT_L", NULL, "DAC_BUF_REF_L" },
 { "HPOUT_R", NULL, "DAC_BUF_REF_R" },
 { "L_HPOUT_EN", NULL, "DAC_L_HPMIX_SEL" },
 { "R_HPOUT_EN", NULL, "DAC_R_HPMIX_SEL" },
 { "L_HPOUT_WORK", NULL, "L_HPOUT_EN" },
 { "R_HPOUT_WORK", NULL, "R_HPOUT_EN" },
 { "HPOUT_POP_SOUND_L", NULL, "L_HPOUT_WORK" },
 { "HPOUT_POP_SOUND_R", NULL, "R_HPOUT_WORK" },
 { "HPOUT_L", NULL, "HPOUT_POP_SOUND_L" },
 { "HPOUT_R", NULL, "HPOUT_POP_SOUND_R" },

 { "L_LINEOUT_EN", NULL, "DAC_L_HPMIX_SEL" },
 { "R_LINEOUT_EN", NULL, "DAC_R_HPMIX_SEL" },
 { "LINEOUT_L", NULL, "L_LINEOUT_EN" },
 { "LINEOUT_R", NULL, "R_LINEOUT_EN" },
};

static int rk3308_codec_set_dai_fmt(struct snd_soc_dai *codec_dai,
        unsigned int fmt)
{
 struct snd_soc_component *component = codec_dai->component;
 struct rk3308_codec_priv *rk3308 = snd_soc_component_get_drvdata(component);
 const unsigned int inv_bits = fmt & SND_SOC_DAIFMT_INV_MASK;
 const bool inv_bitclk =
  (inv_bits & SND_SOC_DAIFMT_IB_IF) ||
  (inv_bits & SND_SOC_DAIFMT_IB_NF);
 const bool inv_frmclk =
  (inv_bits & SND_SOC_DAIFMT_IB_IF) ||
  (inv_bits & SND_SOC_DAIFMT_NB_IF);
 const unsigned int dac_master_bits = rk3308->codec_ver < ACODEC_VERSION_C ?
  RK3308_DAC_IO_MODE_MASTER   | RK3308_DAC_MODE_MASTER  :
  RK3308BS_DAC_IO_MODE_MASTER | RK3308BS_DAC_MODE_MASTER;
 unsigned int adc_aif1 = 0, adc_aif2 = 0, dac_aif1 = 0, dac_aif2 = 0;
 bool is_master = false;
 int grp;

 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 case SND_SOC_DAIFMT_CBC_CFC:
  break;
 case SND_SOC_DAIFMT_CBP_CFP:
  adc_aif2 |= RK3308_ADC_IO_MODE_MASTER;
  adc_aif2 |= RK3308_ADC_MODE_MASTER;
  dac_aif2 |= dac_master_bits;
  is_master = true;
  break;
 default:
  return -EINVAL;
 }

 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 case SND_SOC_DAIFMT_DSP_A:
  adc_aif1 |= RK3308_ADC_I2S_MODE_PCM;
  dac_aif1 |= RK3308_DAC_I2S_MODE_PCM;
  break;
 case SND_SOC_DAIFMT_I2S:
  adc_aif1 |= RK3308_ADC_I2S_MODE_I2S;
  dac_aif1 |= RK3308_DAC_I2S_MODE_I2S;
  break;
 case SND_SOC_DAIFMT_RIGHT_J:
  adc_aif1 |= RK3308_ADC_I2S_MODE_RJ;
  dac_aif1 |= RK3308_DAC_I2S_MODE_RJ;
  break;
 case SND_SOC_DAIFMT_LEFT_J:
  adc_aif1 |= RK3308_ADC_I2S_MODE_LJ;
  dac_aif1 |= RK3308_DAC_I2S_MODE_LJ;
  break;
 default:
  return -EINVAL;
 }

 if (inv_bitclk) {
  adc_aif2 |= RK3308_ADC_I2S_BIT_CLK_POL_REVERSAL;
  dac_aif2 |= RK3308_DAC_I2S_BIT_CLK_POL_REVERSAL;
 }

 if (inv_frmclk) {
  adc_aif1 |= RK3308_ADC_I2S_LRC_POL_REVERSAL;
  dac_aif1 |= RK3308_DAC_I2S_LRC_POL_REVERSAL;
 }

 /*
 * Hold ADC Digital registers start at master mode
 *
 * There are 8 ADCs which use the same internal SCLK and LRCK for
 * master mode. We need to make sure that they are in effect at the
 * same time, otherwise they will cause abnormal clocks.
 */
 if (is_master)
  regmap_clear_bits(rk3308->regmap, RK3308_GLB_CON, RK3308_ADC_DIG_WORK);

 for (grp = 0; grp < ADC_LR_GROUP_MAX; grp++) {
  regmap_update_bits(rk3308->regmap, RK3308_ADC_DIG_CON01(grp),
       RK3308_ADC_I2S_LRC_POL_REVERSAL |
       RK3308_ADC_I2S_MODE_MSK,
       adc_aif1);
  regmap_update_bits(rk3308->regmap, RK3308_ADC_DIG_CON02(grp),
       RK3308_ADC_IO_MODE_MASTER |
       RK3308_ADC_MODE_MASTER |
       RK3308_ADC_I2S_BIT_CLK_POL_REVERSAL,
       adc_aif2);
 }

 /* Hold ADC Digital registers end at master mode */
 if (is_master)
  regmap_set_bits(rk3308->regmap, RK3308_GLB_CON, RK3308_ADC_DIG_WORK);

 regmap_update_bits(rk3308->regmap, RK3308_DAC_DIG_CON01,
      RK3308_DAC_I2S_LRC_POL_REVERSAL |
      RK3308_DAC_I2S_MODE_MSK,
      dac_aif1);
 regmap_update_bits(rk3308->regmap, RK3308_DAC_DIG_CON02,
      dac_master_bits | RK3308_DAC_I2S_BIT_CLK_POL_REVERSAL,
      dac_aif2);

 return 0;
}

static int rk3308_codec_dac_dig_config(struct rk3308_codec_priv *rk3308,
           struct snd_pcm_hw_params *params)
{
 unsigned int dac_aif1 = 0;

 switch (params_format(params)) {
 case SNDRV_PCM_FORMAT_S16_LE:
  dac_aif1 |= RK3308_DAC_I2S_VALID_LEN_16BITS;
  break;
 case SNDRV_PCM_FORMAT_S20_3LE:
  dac_aif1 |= RK3308_DAC_I2S_VALID_LEN_20BITS;
  break;
 case SNDRV_PCM_FORMAT_S24_LE:
  dac_aif1 |= RK3308_DAC_I2S_VALID_LEN_24BITS;
  break;
 case SNDRV_PCM_FORMAT_S32_LE:
  dac_aif1 |= RK3308_DAC_I2S_VALID_LEN_32BITS;
  break;
 default:
  return -EINVAL;
 }

 regmap_update_bits(rk3308->regmap, RK3308_DAC_DIG_CON01,
      RK3308_DAC_I2S_VALID_LEN_MSK, dac_aif1);
 regmap_set_bits(rk3308->regmap, RK3308_DAC_DIG_CON02, RK3308_DAC_I2S_WORK);

 return 0;
}

static int rk3308_codec_adc_dig_config(struct rk3308_codec_priv *rk3308,
           struct snd_pcm_hw_params *params)
{
 unsigned int adc_aif1 = 0;
 /*
 * grp 0 = ADC1 and ADC2
 * grp 1 = ADC3 and ADC4
 * grp 2 = ADC5 and ADC6
 * grp 3 = ADC7 and ADC8
 */
 u32 used_adc_grps;
 int grp;

 switch (params_channels(params)) {
 case 1:
  adc_aif1 |= RK3308_ADC_I2S_MONO;
  used_adc_grps = 1;
  break;
 case 2:
 case 4:
 case 6:
 case 8:
  used_adc_grps = params_channels(params) / 2;
  break;
 default:
  dev_err(rk3308->dev, "Invalid channel number %d\n", params_channels(params));
  return -EINVAL;
 }

 switch (params_format(params)) {
 case SNDRV_PCM_FORMAT_S16_LE:
  adc_aif1 |= RK3308_ADC_I2S_VALID_LEN_16BITS;
  break;
 case SNDRV_PCM_FORMAT_S20_3LE:
  adc_aif1 |= RK3308_ADC_I2S_VALID_LEN_20BITS;
  break;
 case SNDRV_PCM_FORMAT_S24_LE:
  adc_aif1 |= RK3308_ADC_I2S_VALID_LEN_24BITS;
  break;
 case SNDRV_PCM_FORMAT_S32_LE:
  adc_aif1 |= RK3308_ADC_I2S_VALID_LEN_32BITS;
  break;
 default:
  return -EINVAL;
 }

 for (grp = 0; grp < used_adc_grps; grp++) {
  regmap_update_bits(rk3308->regmap,
       RK3308_ADC_DIG_CON03(grp),
       RK3308_ADC_L_CH_BIST_MSK | RK3308_ADC_R_CH_BIST_MSK,
       RK3308_ADC_L_CH_NORMAL_LEFT | RK3308_ADC_R_CH_NORMAL_RIGHT);
  regmap_update_bits(rk3308->regmap, RK3308_ADC_DIG_CON01(grp),
       RK3308_ADC_I2S_VALID_LEN_MSK | RK3308_ADC_I2S_MONO, adc_aif1);
  regmap_set_bits(rk3308->regmap, RK3308_ADC_DIG_CON02(grp), RK3308_ADC_I2S_WORK);
 }

 return 0;
}

static int rk3308_codec_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 rk3308_codec_priv *rk3308 = snd_soc_component_get_drvdata(component);

 return (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
  rk3308_codec_dac_dig_config(rk3308, params) :
  rk3308_codec_adc_dig_config(rk3308, params);
}

static const struct snd_soc_dai_ops rk3308_codec_dai_ops = {
 .hw_params = rk3308_codec_hw_params,
 .set_fmt = rk3308_codec_set_dai_fmt,
};

static struct snd_soc_dai_driver rk3308_codec_dai_driver = {
 .name = "rk3308-hifi",
 .playback = {
  .stream_name = "HiFi Playback",
  .channels_min = 2,
  .channels_max = 2,
  .rates = SNDRV_PCM_RATE_8000_192000,
  .formats = (SNDRV_PCM_FMTBIT_S16_LE |
       SNDRV_PCM_FMTBIT_S20_3LE |
       SNDRV_PCM_FMTBIT_S24_LE |
       SNDRV_PCM_FMTBIT_S32_LE),
 },
 .capture = {
  .stream_name = "HiFi Capture",
  .channels_min = 1,
  .channels_max = 8,
  .rates = SNDRV_PCM_RATE_8000_192000,
  .formats = (SNDRV_PCM_FMTBIT_S16_LE |
       SNDRV_PCM_FMTBIT_S20_3LE |
       SNDRV_PCM_FMTBIT_S24_LE |
       SNDRV_PCM_FMTBIT_S32_LE),
 },
 .ops = &rk3308_codec_dai_ops,
};

static void rk3308_codec_reset(struct snd_soc_component *component)
{
 struct rk3308_codec_priv *rk3308 = snd_soc_component_get_drvdata(component);

 reset_control_assert(rk3308->reset);
 usleep_range(10000, 11000);     /* estimated value */
 reset_control_deassert(rk3308->reset);

 regmap_write(rk3308->regmap, RK3308_GLB_CON, 0x00);
 usleep_range(10000, 11000);     /* estimated value */
 regmap_write(rk3308->regmap, RK3308_GLB_CON,
       RK3308_SYS_WORK |
       RK3308_DAC_DIG_WORK |
       RK3308_ADC_DIG_WORK);
}

/*
 * Initialize register whose default after HW reset is problematic or which
 * are never modified.
 */
static int rk3308_codec_initialize(struct rk3308_codec_priv *rk3308)
{
 int grp;

 /*
 * Init ADC digital vol to 0 dB (reset value is 0xff, undocumented).
 * Range: -97dB ~ +32dB.
 */
 if (rk3308->codec_ver == ACODEC_VERSION_C) {
  for (grp = 0; grp < ADC_LR_GROUP_MAX; grp++) {
   regmap_write(rk3308->regmap, RK3308_ADC_DIG_CON05(grp),
        RK3308_ADC_DIG_VOL_CON_x_0DB);
   regmap_write(rk3308->regmap, RK3308_ADC_DIG_CON06(grp),
        RK3308_ADC_DIG_VOL_CON_x_0DB);
  }
 }

 /* set HPMIX default gains (reset value is 0, which is illegal) */
 regmap_update_bits(rk3308->regmap, RK3308_DAC_ANA_CON12,
      RK3308_DAC_L_HPMIX_GAIN_MSK |
      RK3308_DAC_R_HPMIX_GAIN_MSK,
      RK3308_DAC_L_HPMIX_GAIN_NDB_6 |
      RK3308_DAC_R_HPMIX_GAIN_NDB_6);

 /* recover DAC digital gain to 0 dB (reset value is 0xff, undocumented) */
 if (rk3308->codec_ver == ACODEC_VERSION_C)
  regmap_write(rk3308->regmap, RK3308_DAC_DIG_CON04,
        RK3308BS_DAC_DIG_GAIN_0DB);

 /*
 * Unconditionally enable zero-cross detection (needed for AGC,
 * harmless without AGC)
 */
 for (grp = 0; grp < ADC_LR_GROUP_MAX; grp++)
  regmap_set_bits(rk3308->regmap, RK3308_ADC_ANA_CON02(grp),
    RK3308_ADC_CH1_ZEROCROSS_DET_EN |
    RK3308_ADC_CH2_ZEROCROSS_DET_EN);

 return 0;
}

static int rk3308_codec_probe(struct snd_soc_component *component)
{
 struct rk3308_codec_priv *rk3308 = snd_soc_component_get_drvdata(component);

 rk3308->component = component;

 rk3308_codec_reset(component);
 rk3308_codec_initialize(rk3308);

 return 0;
}

static int rk3308_codec_set_bias_level(struct snd_soc_component *component,
           enum snd_soc_bias_level level)
{
 struct rk3308_codec_priv *rk3308 = snd_soc_component_get_drvdata(component);

 switch (level) {
 case SND_SOC_BIAS_ON:
  break;
 case SND_SOC_BIAS_PREPARE:
  break;
 case SND_SOC_BIAS_STANDBY:
  if (snd_soc_component_get_bias_level(component) != SND_SOC_BIAS_OFF)
   break;

  /* Sequence from TRM Section 8.6.3 "Power Up" */
  regmap_set_bits(rk3308->regmap, RK3308_DAC_ANA_CON02,
    RK3308_DAC_L_DAC_EN | RK3308_DAC_R_DAC_EN);
  regmap_update_bits(rk3308->regmap, RK3308_ADC_ANA_CON10(0),
       RK3308_ADC_CURRENT_CHARGE_MSK, 1);
  regmap_set_bits(rk3308->regmap, RK3308_ADC_ANA_CON10(0),
    RK3308_ADC_REF_EN);
  regmap_update_bits(rk3308->regmap, RK3308_ADC_ANA_CON10(0),
       RK3308_ADC_CURRENT_CHARGE_MSK, 0x7f);
  msleep(20); /* estimated value */
  break;
 case SND_SOC_BIAS_OFF:
  /* Sequence from TRM Section 8.6.4 "Power Down" */
  regmap_update_bits(rk3308->regmap, RK3308_ADC_ANA_CON10(0),
       RK3308_ADC_CURRENT_CHARGE_MSK, 1);
  regmap_clear_bits(rk3308->regmap, RK3308_ADC_ANA_CON10(0),
      RK3308_ADC_REF_EN);
  regmap_clear_bits(rk3308->regmap, RK3308_DAC_ANA_CON02,
      RK3308_DAC_L_DAC_EN | RK3308_DAC_R_DAC_EN);
  msleep(20); /* estimated value */
  break;
 }
 return 0;
}

static const struct snd_soc_component_driver rk3308_codec_component_driver = {
 .probe = rk3308_codec_probe,
 .set_bias_level = rk3308_codec_set_bias_level,
 .controls = rk3308_codec_controls,
 .num_controls = ARRAY_SIZE(rk3308_codec_controls),
 .dapm_widgets = rk3308_codec_dapm_widgets,
 .num_dapm_widgets = ARRAY_SIZE(rk3308_codec_dapm_widgets),
 .dapm_routes = rk3308_codec_dapm_routes,
 .num_dapm_routes = ARRAY_SIZE(rk3308_codec_dapm_routes),
};

static const struct regmap_config rk3308_codec_regmap_config = {
 .reg_bits = 32,
 .reg_stride = 4,
 .val_bits = 32,
 .max_register = RK3308_DAC_ANA_CON15,
};

static int rk3308_codec_get_version(struct rk3308_codec_priv *rk3308)
{
 unsigned int chip_id;
 int err;

 err = regmap_read(rk3308->grf, GRF_CHIP_ID, &chip_id);
 if (err)
  return err;

 switch (chip_id) {
 case 3306:
  rk3308->codec_ver = ACODEC_VERSION_A;
  break;
 case 0x3308:
  rk3308->codec_ver = ACODEC_VERSION_B;
  return dev_err_probe(rk3308->dev, -EINVAL, "Chip version B not supported\n");
 case 0x3308c:
  rk3308->codec_ver = ACODEC_VERSION_C;
  break;
 default:
  return dev_err_probe(rk3308->dev, -EINVAL, "Unknown chip_id: 0x%x\n", chip_id);
 }

 dev_info(rk3308->dev, "Found codec version %c\n", rk3308->codec_ver);
 return 0;
}

static int rk3308_codec_set_micbias_level(struct rk3308_codec_priv *rk3308)
{
 struct device_node *np = rk3308->dev->of_node;
 u32 percent;
 u32 mult;
 int err;

 err = of_property_read_u32(np, "rockchip,micbias-avdd-percent", &percent);
 if (err == -EINVAL)
  return 0;
 if (err)
  return dev_err_probe(rk3308->dev, err,
         "Error reading 'rockchip,micbias-avdd-percent'\n");

 /* Convert percent to register value, linerarly (50% -> 0, 5% step = +1) */
 mult = (percent - 50) / 5;

 /* Check range and that the percent was an exact value allowed */
 if (mult > RK3308_ADC_LEVEL_RANGE_MICBIAS_MAX || mult * 5 + 50 != percent)
  return dev_err_probe(rk3308->dev, -EINVAL,
         "Invalid value %u for 'rockchip,micbias-avdd-percent'\n",
         percent);

 regmap_update_bits(rk3308->regmap, RK3308_ADC_ANA_CON07(0),
      RK3308_ADC_LEVEL_RANGE_MICBIAS_MSK,
      mult << RK3308_ADC_LEVEL_RANGE_MICBIAS_SFT);

 return 0;
}

static int rk3308_codec_platform_probe(struct platform_device *pdev)
{
 struct device_node *np = pdev->dev.of_node;
 struct device *dev = &pdev->dev;
 struct rk3308_codec_priv *rk3308;
 void __iomem *base;
 int err;

 rk3308 = devm_kzalloc(&pdev->dev, sizeof(*rk3308), GFP_KERNEL);
 if (!rk3308)
  return -ENOMEM;

 rk3308->dev = dev;

 rk3308->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
 if (IS_ERR(rk3308->grf))
  return dev_err_probe(dev, PTR_ERR(rk3308->grf), "Error getting GRF\n");

 rk3308->reset = devm_reset_control_get_optional_exclusive(dev, "codec");
 if (IS_ERR(rk3308->reset))
  return dev_err_probe(dev, PTR_ERR(rk3308->reset), "Failed to get reset control\n");

 err = devm_clk_bulk_get(dev, ARRAY_SIZE(rk3308_codec_clocks), rk3308_codec_clocks);
 if (err)
  return dev_err_probe(dev, err, "Failed to get clocks\n");

 err = clk_bulk_prepare_enable(ARRAY_SIZE(rk3308_codec_clocks), rk3308_codec_clocks);
 if (err)
  return dev_err_probe(dev, err, "Failed to enable clocks\n");

 err = rk3308_codec_get_version(rk3308);
 if (err)
  return err;

 base = devm_platform_ioremap_resource(pdev, 0);
 if (IS_ERR(base))
  return PTR_ERR(base);

 rk3308->regmap = devm_regmap_init_mmio(dev, base, &rk3308_codec_regmap_config);
 if (IS_ERR(rk3308->regmap))
  return dev_err_probe(dev, PTR_ERR(rk3308->regmap),
         "Failed to init regmap\n");

 platform_set_drvdata(pdev, rk3308);

 err = rk3308_codec_set_micbias_level(rk3308);
 if (err)
  return err;

 err = devm_snd_soc_register_component(dev, &rk3308_codec_component_driver,
           &rk3308_codec_dai_driver, 1);
 if (err)
  return dev_err_probe(dev, err, "Failed to register codec\n");

 return 0;
}

static const struct of_device_id __maybe_unused rk3308_codec_of_match[] = {
 { .compatible = "rockchip,rk3308-codec", },
 {},
};
MODULE_DEVICE_TABLE(of, rk3308_codec_of_match);

static struct platform_driver rk3308_codec_driver = {
 .driver = {
  .name = "rk3308-acodec",
  .of_match_table = rk3308_codec_of_match,
 },
 .probe = rk3308_codec_platform_probe,
};
module_platform_driver(rk3308_codec_driver);

MODULE_AUTHOR("Xing Zheng ");
MODULE_AUTHOR("Luca Ceresoli ");
MODULE_DESCRIPTION("ASoC RK3308 Codec Driver");
MODULE_LICENSE("GPL");