wm8753.c

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/*
 * wm8753.c  --  WM8753 ALSA Soc Audio driver
 *
 * Copyright 2003-11 Wolfson Microelectronics PLC.
 * Author: Liam Girdwood <[email protected]>
 *
 *  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.
 *
 * Notes:
 *  The WM8753 is a low power, high quality stereo codec with integrated PCM
 *  codec designed for portable digital telephony applications.
 *
 * Dual DAI:-
 *
 * This driver support 2 DAI PCM's. This makes the default PCM available for
 * HiFi audio (e.g. MP3, ogg) playback/capture and the other PCM available for
 * voice.
 *
 * Please note that the voice PCM can be connected directly to a Bluetooth
 * codec or GSM modem and thus cannot be read or written to, although it is
 * available to be configured with snd_hw_params(), etc and kcontrols in the
 * normal alsa manner.
 *
 * Fast DAI switching:-
 *
 * The driver can now fast switch between the DAI configurations via a
 * an alsa kcontrol. This allows the PCM to remain open.
 *
 */

#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/of_device.h>
#include <linux/regmap.h>
#include <linux/spi/spi.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 "wm8753.h"

static int caps_charge = 2000;
module_param(caps_charge, int, 0);
MODULE_PARM_DESC(caps_charge, "WM8753 cap charge time (msecs)");

static int wm8753_hifi_write_dai_fmt(struct snd_soc_codec *codec,
        unsigned int fmt);
static int wm8753_voice_write_dai_fmt(struct snd_soc_codec *codec,
        unsigned int fmt);

/*
 * wm8753 register cache
 * We can't read the WM8753 register space when we
 * are using 2 wire for device control, so we cache them instead.
 */
static const struct reg_default wm8753_reg_defaults[] = {
    { 0x00, 0x0000 },
    { 0x01, 0x0008 },
    { 0x02, 0x0000 },
    { 0x03, 0x000a },
    { 0x04, 0x000a },
    { 0x05, 0x0033 },
    { 0x06, 0x0000 },
    { 0x07, 0x0007 },
    { 0x08, 0x00ff },
    { 0x09, 0x00ff },
    { 0x0a, 0x000f },
    { 0x0b, 0x000f },
    { 0x0c, 0x007b },
    { 0x0d, 0x0000 },
    { 0x0e, 0x0032 },
    { 0x0f, 0x0000 },
    { 0x10, 0x00c3 },
    { 0x11, 0x00c3 },
    { 0x12, 0x00c0 },
    { 0x13, 0x0000 },
    { 0x14, 0x0000 },
    { 0x15, 0x0000 },
    { 0x16, 0x0000 },
    { 0x17, 0x0000 },
    { 0x18, 0x0000 },
    { 0x19, 0x0000 },
    { 0x1a, 0x0000 },
    { 0x1b, 0x0000 },
    { 0x1c, 0x0000 },
    { 0x1d, 0x0000 },
    { 0x1e, 0x0000 },
    { 0x1f, 0x0000 },
    { 0x20, 0x0055 },
    { 0x21, 0x0005 },
    { 0x22, 0x0050 },
    { 0x23, 0x0055 },
    { 0x24, 0x0050 },
    { 0x25, 0x0055 },
    { 0x26, 0x0050 },
    { 0x27, 0x0055 },
    { 0x28, 0x0079 },
    { 0x29, 0x0079 },
    { 0x2a, 0x0079 },
    { 0x2b, 0x0079 },
    { 0x2c, 0x0079 },
    { 0x2d, 0x0000 },
    { 0x2e, 0x0000 },
    { 0x2f, 0x0000 },
    { 0x30, 0x0000 },
    { 0x31, 0x0097 },
    { 0x32, 0x0097 },
    { 0x33, 0x0000 },
    { 0x34, 0x0004 },
    { 0x35, 0x0000 },
    { 0x36, 0x0083 },
    { 0x37, 0x0024 },
    { 0x38, 0x01ba },
    { 0x39, 0x0000 },
    { 0x3a, 0x0083 },
    { 0x3b, 0x0024 },
    { 0x3c, 0x01ba },
    { 0x3d, 0x0000 },
    { 0x3e, 0x0000 },
    { 0x3f, 0x0000 },
};

static bool wm8753_volatile(struct device *dev, unsigned int reg)
{
    return reg == WM8753_RESET;
}

static bool wm8753_writeable(struct device *dev, unsigned int reg)
{
    return reg <= WM8753_ADCTL2;
}

/* codec private data */
struct wm8753_priv {
    struct regmap *regmap;
    unsigned int sysclk;
    unsigned int pcmclk;

    unsigned int voice_fmt;
    unsigned int hifi_fmt;

    int dai_func;
};

#define wm8753_reset(c) snd_soc_write(c, WM8753_RESET, 0)

/*
 * WM8753 Controls
 */
static const char *wm8753_base[] = {"Linear Control", "Adaptive Boost"};
static const char *wm8753_base_filter[] =
    {"130Hz @ 48kHz", "200Hz @ 48kHz", "100Hz @ 16kHz", "400Hz @ 48kHz",
    "100Hz @ 8kHz", "200Hz @ 8kHz"};
static const char *wm8753_treble[] = {"8kHz", "4kHz"};
static const char *wm8753_alc_func[] = {"Off", "Right", "Left", "Stereo"};
static const char *wm8753_ng_type[] = {"Constant PGA Gain", "Mute ADC Output"};
static const char *wm8753_3d_func[] = {"Capture", "Playback"};
static const char *wm8753_3d_uc[] = {"2.2kHz", "1.5kHz"};
static const char *wm8753_3d_lc[] = {"200Hz", "500Hz"};
static const char *wm8753_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz"};
static const char *wm8753_mono_mix[] = {"Stereo", "Left", "Right", "Mono"};
static const char *wm8753_dac_phase[] = {"Non Inverted", "Inverted"};
static const char *wm8753_line_mix[] = {"Line 1 + 2", "Line 1 - 2",
    "Line 1", "Line 2"};
static const char *wm8753_mono_mux[] = {"Line Mix", "Rx Mix"};
static const char *wm8753_right_mux[] = {"Line 2", "Rx Mix"};
static const char *wm8753_left_mux[] = {"Line 1", "Rx Mix"};
static const char *wm8753_rxmsel[] = {"RXP - RXN", "RXP + RXN", "RXP", "RXN"};
static const char *wm8753_sidetone_mux[] = {"Left PGA", "Mic 1", "Mic 2",
    "Right PGA"};
static const char *wm8753_mono2_src[] = {"Inverted Mono 1", "Left", "Right",
    "Left + Right"};
static const char *wm8753_out3[] = {"VREF", "ROUT2", "Left + Right"};
static const char *wm8753_out4[] = {"VREF", "Capture ST", "LOUT2"};
static const char *wm8753_radcsel[] = {"PGA", "Line or RXP-RXN", "Sidetone"};
static const char *wm8753_ladcsel[] = {"PGA", "Line or RXP-RXN", "Line"};
static const char *wm8753_mono_adc[] = {"Stereo", "Analogue Mix Left",
    "Analogue Mix Right", "Digital Mono Mix"};
static const char *wm8753_adc_hp[] = {"3.4Hz @ 48kHz", "82Hz @ 16k",
    "82Hz @ 8kHz", "170Hz @ 8kHz"};
static const char *wm8753_adc_filter[] = {"HiFi", "Voice"};
static const char *wm8753_mic_sel[] = {"Mic 1", "Mic 2", "Mic 3"};
static const char *wm8753_dai_mode[] = {"DAI 0", "DAI 1", "DAI 2", "DAI 3"};
static const char *wm8753_dat_sel[] = {"Stereo", "Left ADC", "Right ADC",
    "Channel Swap"};
static const char *wm8753_rout2_phase[] = {"Non Inverted", "Inverted"};

static const struct soc_enum wm8753_enum[] = {
SOC_ENUM_SINGLE(WM8753_BASS, 7, 2, wm8753_base),
SOC_ENUM_SINGLE(WM8753_BASS, 4, 6, wm8753_base_filter),
SOC_ENUM_SINGLE(WM8753_TREBLE, 6, 2, wm8753_treble),
SOC_ENUM_SINGLE(WM8753_ALC1, 7, 4, wm8753_alc_func),
SOC_ENUM_SINGLE(WM8753_NGATE, 1, 2, wm8753_ng_type),
SOC_ENUM_SINGLE(WM8753_3D, 7, 2, wm8753_3d_func),
SOC_ENUM_SINGLE(WM8753_3D, 6, 2, wm8753_3d_uc),
SOC_ENUM_SINGLE(WM8753_3D, 5, 2, wm8753_3d_lc),
SOC_ENUM_SINGLE(WM8753_DAC, 1, 4, wm8753_deemp),
SOC_ENUM_SINGLE(WM8753_DAC, 4, 4, wm8753_mono_mix),
SOC_ENUM_SINGLE(WM8753_DAC, 6, 2, wm8753_dac_phase),
SOC_ENUM_SINGLE(WM8753_INCTL1, 3, 4, wm8753_line_mix),
SOC_ENUM_SINGLE(WM8753_INCTL1, 2, 2, wm8753_mono_mux),
SOC_ENUM_SINGLE(WM8753_INCTL1, 1, 2, wm8753_right_mux),
SOC_ENUM_SINGLE(WM8753_INCTL1, 0, 2, wm8753_left_mux),
SOC_ENUM_SINGLE(WM8753_INCTL2, 6, 4, wm8753_rxmsel),
SOC_ENUM_SINGLE(WM8753_INCTL2, 4, 4, wm8753_sidetone_mux),
SOC_ENUM_SINGLE(WM8753_OUTCTL, 7, 4, wm8753_mono2_src),
SOC_ENUM_SINGLE(WM8753_OUTCTL, 0, 3, wm8753_out3),
SOC_ENUM_SINGLE(WM8753_ADCTL2, 7, 3, wm8753_out4),
SOC_ENUM_SINGLE(WM8753_ADCIN, 2, 3, wm8753_radcsel),
SOC_ENUM_SINGLE(WM8753_ADCIN, 0, 3, wm8753_ladcsel),
SOC_ENUM_SINGLE(WM8753_ADCIN, 4, 4, wm8753_mono_adc),
SOC_ENUM_SINGLE(WM8753_ADC, 2, 4, wm8753_adc_hp),
SOC_ENUM_SINGLE(WM8753_ADC, 4, 2, wm8753_adc_filter),
SOC_ENUM_SINGLE(WM8753_MICBIAS, 6, 3, wm8753_mic_sel),
SOC_ENUM_SINGLE(WM8753_IOCTL, 2, 4, wm8753_dai_mode),
SOC_ENUM_SINGLE(WM8753_ADC, 7, 4, wm8753_dat_sel),
SOC_ENUM_SINGLE(WM8753_OUTCTL, 2, 2, wm8753_rout2_phase),
};


static int wm8753_get_dai(struct snd_kcontrol *kcontrol,
    struct snd_ctl_elem_value *ucontrol)
{
    struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
    struct wm8753_priv *wm8753 = snd_soc_codec_get_drvdata(codec);

    ucontrol->value.integer.value[0] = wm8753->dai_func;
    return 0;
}

static int wm8753_set_dai(struct snd_kcontrol *kcontrol,
    struct snd_ctl_elem_value *ucontrol)
{
    struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
    struct wm8753_priv *wm8753 = snd_soc_codec_get_drvdata(codec);
    u16 ioctl;

    if (wm8753->dai_func == ucontrol->value.integer.value[0])
        return 0;

    if (codec->active)
        return -EBUSY;

    ioctl = snd_soc_read(codec, WM8753_IOCTL);

    wm8753->dai_func = ucontrol->value.integer.value[0];

    if (((ioctl >> 2) & 0x3) == wm8753->dai_func)
        return 1;

    ioctl = (ioctl & 0x1f3) | (wm8753->dai_func << 2);
    snd_soc_write(codec, WM8753_IOCTL, ioctl);


    wm8753_hifi_write_dai_fmt(codec, wm8753->hifi_fmt);
    wm8753_voice_write_dai_fmt(codec, wm8753->voice_fmt);

    return 1;
}

static const DECLARE_TLV_DB_SCALE(rec_mix_tlv, -1500, 300, 0);
static const DECLARE_TLV_DB_SCALE(mic_preamp_tlv, 1200, 600, 0);
static const DECLARE_TLV_DB_SCALE(adc_tlv, -9750, 50, 1);
static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
static const unsigned int out_tlv[] = {
    TLV_DB_RANGE_HEAD(2),
    /* 0000000 - 0101111 = "Analogue mute" */
    0, 48, TLV_DB_SCALE_ITEM(-25500, 0, 0),
    48, 127, TLV_DB_SCALE_ITEM(-7300, 100, 0),
};
static const DECLARE_TLV_DB_SCALE(mix_tlv, -1500, 300, 0);
static const DECLARE_TLV_DB_SCALE(voice_mix_tlv, -1200, 300, 0);
static const DECLARE_TLV_DB_SCALE(pga_tlv, -1725, 75, 0);

static const struct snd_kcontrol_new wm8753_snd_controls[] = {
SOC_DOUBLE_R_TLV("PCM Volume", WM8753_LDAC, WM8753_RDAC, 0, 255, 0, dac_tlv),

SOC_DOUBLE_R_TLV("ADC Capture Volume", WM8753_LADC, WM8753_RADC, 0, 255, 0,
         adc_tlv),

SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8753_LOUT1V, WM8753_ROUT1V,
         0, 127, 0, out_tlv),
SOC_DOUBLE_R_TLV("Speaker Playback Volume", WM8753_LOUT2V, WM8753_ROUT2V, 0,
         127, 0, out_tlv),

SOC_SINGLE_TLV("Mono Playback Volume", WM8753_MOUTV, 0, 127, 0, out_tlv),

SOC_DOUBLE_R_TLV("Bypass Playback Volume", WM8753_LOUTM1, WM8753_ROUTM1, 4, 7,
         1, mix_tlv),
SOC_DOUBLE_R_TLV("Sidetone Playback Volume", WM8753_LOUTM2, WM8753_ROUTM2, 4,
         7, 1, mix_tlv),
SOC_DOUBLE_R_TLV("Voice Playback Volume", WM8753_LOUTM2, WM8753_ROUTM2, 0, 7,
         1, voice_mix_tlv),

SOC_DOUBLE_R("Headphone Playback ZC Switch", WM8753_LOUT1V, WM8753_ROUT1V, 7,
         1, 0),
SOC_DOUBLE_R("Speaker Playback ZC Switch", WM8753_LOUT2V, WM8753_ROUT2V, 7,
         1, 0),

SOC_SINGLE_TLV("Mono Bypass Playback Volume", WM8753_MOUTM1, 4, 7, 1, mix_tlv),
SOC_SINGLE_TLV("Mono Sidetone Playback Volume", WM8753_MOUTM2, 4, 7, 1,
           mix_tlv),
SOC_SINGLE_TLV("Mono Voice Playback Volume", WM8753_MOUTM2, 0, 7, 1,
           voice_mix_tlv),
SOC_SINGLE("Mono Playback ZC Switch", WM8753_MOUTV, 7, 1, 0),

SOC_ENUM("Bass Boost", wm8753_enum[0]),
SOC_ENUM("Bass Filter", wm8753_enum[1]),
SOC_SINGLE("Bass Volume", WM8753_BASS, 0, 15, 1),

SOC_SINGLE("Treble Volume", WM8753_TREBLE, 0, 15, 1),
SOC_ENUM("Treble Cut-off", wm8753_enum[2]),

SOC_DOUBLE_TLV("Sidetone Capture Volume", WM8753_RECMIX1, 0, 4, 7, 1,
           rec_mix_tlv),
SOC_SINGLE_TLV("Voice Sidetone Capture Volume", WM8753_RECMIX2, 0, 7, 1,
           rec_mix_tlv),

SOC_DOUBLE_R_TLV("Capture Volume", WM8753_LINVOL, WM8753_RINVOL, 0, 63, 0,
         pga_tlv),
SOC_DOUBLE_R("Capture ZC Switch", WM8753_LINVOL, WM8753_RINVOL, 6, 1, 0),
SOC_DOUBLE_R("Capture Switch", WM8753_LINVOL, WM8753_RINVOL, 7, 1, 1),

SOC_ENUM("Capture Filter Select", wm8753_enum[23]),
SOC_ENUM("Capture Filter Cut-off", wm8753_enum[24]),
SOC_SINGLE("Capture Filter Switch", WM8753_ADC, 0, 1, 1),

SOC_SINGLE("ALC Capture Target Volume", WM8753_ALC1, 0, 7, 0),
SOC_SINGLE("ALC Capture Max Volume", WM8753_ALC1, 4, 7, 0),
SOC_ENUM("ALC Capture Function", wm8753_enum[3]),
SOC_SINGLE("ALC Capture ZC Switch", WM8753_ALC2, 8, 1, 0),
SOC_SINGLE("ALC Capture Hold Time", WM8753_ALC2, 0, 15, 1),
SOC_SINGLE("ALC Capture Decay Time", WM8753_ALC3, 4, 15, 1),
SOC_SINGLE("ALC Capture Attack Time", WM8753_ALC3, 0, 15, 0),
SOC_SINGLE("ALC Capture NG Threshold", WM8753_NGATE, 3, 31, 0),
SOC_ENUM("ALC Capture NG Type", wm8753_enum[4]),
SOC_SINGLE("ALC Capture NG Switch", WM8753_NGATE, 0, 1, 0),

SOC_ENUM("3D Function", wm8753_enum[5]),
SOC_ENUM("3D Upper Cut-off", wm8753_enum[6]),
SOC_ENUM("3D Lower Cut-off", wm8753_enum[7]),
SOC_SINGLE("3D Volume", WM8753_3D, 1, 15, 0),
SOC_SINGLE("3D Switch", WM8753_3D, 0, 1, 0),

SOC_SINGLE("Capture 6dB Attenuate", WM8753_ADCTL1, 2, 1, 0),
SOC_SINGLE("Playback 6dB Attenuate", WM8753_ADCTL1, 1, 1, 0),

SOC_ENUM("De-emphasis", wm8753_enum[8]),
SOC_ENUM("Playback Mono Mix", wm8753_enum[9]),
SOC_ENUM("Playback Phase", wm8753_enum[10]),

SOC_SINGLE_TLV("Mic2 Capture Volume", WM8753_INCTL1, 7, 3, 0, mic_preamp_tlv),
SOC_SINGLE_TLV("Mic1 Capture Volume", WM8753_INCTL1, 5, 3, 0, mic_preamp_tlv),

SOC_ENUM_EXT("DAI Mode", wm8753_enum[26], wm8753_get_dai, wm8753_set_dai),

SOC_ENUM("ADC Data Select", wm8753_enum[27]),
SOC_ENUM("ROUT2 Phase", wm8753_enum[28]),
};

/*
 * _DAPM_ Controls
 */

/* Left Mixer */
static const struct snd_kcontrol_new wm8753_left_mixer_controls[] = {
SOC_DAPM_SINGLE("Voice Playback Switch", WM8753_LOUTM2, 8, 1, 0),
SOC_DAPM_SINGLE("Sidetone Playback Switch", WM8753_LOUTM2, 7, 1, 0),
SOC_DAPM_SINGLE("Left Playback Switch", WM8753_LOUTM1, 8, 1, 0),
SOC_DAPM_SINGLE("Bypass Playback Switch", WM8753_LOUTM1, 7, 1, 0),
};

/* Right mixer */
static const struct snd_kcontrol_new wm8753_right_mixer_controls[] = {
SOC_DAPM_SINGLE("Voice Playback Switch", WM8753_ROUTM2, 8, 1, 0),
SOC_DAPM_SINGLE("Sidetone Playback Switch", WM8753_ROUTM2, 7, 1, 0),
SOC_DAPM_SINGLE("Right Playback Switch", WM8753_ROUTM1, 8, 1, 0),
SOC_DAPM_SINGLE("Bypass Playback Switch", WM8753_ROUTM1, 7, 1, 0),
};

/* Mono mixer */
static const struct snd_kcontrol_new wm8753_mono_mixer_controls[] = {
SOC_DAPM_SINGLE("Left Playback Switch", WM8753_MOUTM1, 8, 1, 0),
SOC_DAPM_SINGLE("Right Playback Switch", WM8753_MOUTM2, 8, 1, 0),
SOC_DAPM_SINGLE("Voice Playback Switch", WM8753_MOUTM2, 3, 1, 0),
SOC_DAPM_SINGLE("Sidetone Playback Switch", WM8753_MOUTM2, 7, 1, 0),
SOC_DAPM_SINGLE("Bypass Playback Switch", WM8753_MOUTM1, 7, 1, 0),
};

/* Mono 2 Mux */
static const struct snd_kcontrol_new wm8753_mono2_controls =
SOC_DAPM_ENUM("Route", wm8753_enum[17]);

/* Out 3 Mux */
static const struct snd_kcontrol_new wm8753_out3_controls =
SOC_DAPM_ENUM("Route", wm8753_enum[18]);

/* Out 4 Mux */
static const struct snd_kcontrol_new wm8753_out4_controls =
SOC_DAPM_ENUM("Route", wm8753_enum[19]);

/* ADC Mono Mix */
static const struct snd_kcontrol_new wm8753_adc_mono_controls =
SOC_DAPM_ENUM("Route", wm8753_enum[22]);

/* Record mixer */
static const struct snd_kcontrol_new wm8753_record_mixer_controls[] = {
SOC_DAPM_SINGLE("Voice Capture Switch", WM8753_RECMIX2, 3, 1, 0),
SOC_DAPM_SINGLE("Left Capture Switch", WM8753_RECMIX1, 3, 1, 0),
SOC_DAPM_SINGLE("Right Capture Switch", WM8753_RECMIX1, 7, 1, 0),
};

/* Left ADC mux */
static const struct snd_kcontrol_new wm8753_adc_left_controls =
SOC_DAPM_ENUM("Route", wm8753_enum[21]);

/* Right ADC mux */
static const struct snd_kcontrol_new wm8753_adc_right_controls =
SOC_DAPM_ENUM("Route", wm8753_enum[20]);

/* MIC mux */
static const struct snd_kcontrol_new wm8753_mic_mux_controls =
SOC_DAPM_ENUM("Route", wm8753_enum[16]);

/* ALC mixer */
static const struct snd_kcontrol_new wm8753_alc_mixer_controls[] = {
SOC_DAPM_SINGLE("Line Capture Switch", WM8753_INCTL2, 3, 1, 0),
SOC_DAPM_SINGLE("Mic2 Capture Switch", WM8753_INCTL2, 2, 1, 0),
SOC_DAPM_SINGLE("Mic1 Capture Switch", WM8753_INCTL2, 1, 1, 0),
SOC_DAPM_SINGLE("Rx Capture Switch", WM8753_INCTL2, 0, 1, 0),
};

/* Left Line mux */
static const struct snd_kcontrol_new wm8753_line_left_controls =
SOC_DAPM_ENUM("Route", wm8753_enum[14]);

/* Right Line mux */
static const struct snd_kcontrol_new wm8753_line_right_controls =
SOC_DAPM_ENUM("Route", wm8753_enum[13]);

/* Mono Line mux */
static const struct snd_kcontrol_new wm8753_line_mono_controls =
SOC_DAPM_ENUM("Route", wm8753_enum[12]);

/* Line mux and mixer */
static const struct snd_kcontrol_new wm8753_line_mux_mix_controls =
SOC_DAPM_ENUM("Route", wm8753_enum[11]);

/* Rx mux and mixer */
static const struct snd_kcontrol_new wm8753_rx_mux_mix_controls =
SOC_DAPM_ENUM("Route", wm8753_enum[15]);

/* Mic Selector Mux */
static const struct snd_kcontrol_new wm8753_mic_sel_mux_controls =
SOC_DAPM_ENUM("Route", wm8753_enum[25]);

static const struct snd_soc_dapm_widget wm8753_dapm_widgets[] = {
SND_SOC_DAPM_MICBIAS("Mic Bias", WM8753_PWR1, 5, 0),
SND_SOC_DAPM_MIXER("Left Mixer", WM8753_PWR4, 0, 0,
    &wm8753_left_mixer_controls[0], ARRAY_SIZE(wm8753_left_mixer_controls)),
SND_SOC_DAPM_PGA("Left Out 1", WM8753_PWR3, 8, 0, NULL, 0),
SND_SOC_DAPM_PGA("Left Out 2", WM8753_PWR3, 6, 0, NULL, 0),
SND_SOC_DAPM_DAC("Left DAC", "Left HiFi Playback", WM8753_PWR1, 3, 0),
SND_SOC_DAPM_OUTPUT("LOUT1"),
SND_SOC_DAPM_OUTPUT("LOUT2"),
SND_SOC_DAPM_MIXER("Right Mixer", WM8753_PWR4, 1, 0,
    &wm8753_right_mixer_controls[0], ARRAY_SIZE(wm8753_right_mixer_controls)),
SND_SOC_DAPM_PGA("Right Out 1", WM8753_PWR3, 7, 0, NULL, 0),
SND_SOC_DAPM_PGA("Right Out 2", WM8753_PWR3, 5, 0, NULL, 0),
SND_SOC_DAPM_DAC("Right DAC", "Right HiFi Playback", WM8753_PWR1, 2, 0),
SND_SOC_DAPM_OUTPUT("ROUT1"),
SND_SOC_DAPM_OUTPUT("ROUT2"),
SND_SOC_DAPM_MIXER("Mono Mixer", WM8753_PWR4, 2, 0,
    &wm8753_mono_mixer_controls[0], ARRAY_SIZE(wm8753_mono_mixer_controls)),
SND_SOC_DAPM_PGA("Mono Out 1", WM8753_PWR3, 2, 0, NULL, 0),
SND_SOC_DAPM_PGA("Mono Out 2", WM8753_PWR3, 1, 0, NULL, 0),
SND_SOC_DAPM_DAC("Voice DAC", "Voice Playback", WM8753_PWR1, 4, 0),
SND_SOC_DAPM_OUTPUT("MONO1"),
SND_SOC_DAPM_MUX("Mono 2 Mux", SND_SOC_NOPM, 0, 0, &wm8753_mono2_controls),
SND_SOC_DAPM_OUTPUT("MONO2"),
SND_SOC_DAPM_MIXER("Out3 Left + Right", -1, 0, 0, NULL, 0),
SND_SOC_DAPM_MUX("Out3 Mux", SND_SOC_NOPM, 0, 0, &wm8753_out3_controls),
SND_SOC_DAPM_PGA("Out 3", WM8753_PWR3, 4, 0, NULL, 0),
SND_SOC_DAPM_OUTPUT("OUT3"),
SND_SOC_DAPM_MUX("Out4 Mux", SND_SOC_NOPM, 0, 0, &wm8753_out4_controls),
SND_SOC_DAPM_PGA("Out 4", WM8753_PWR3, 3, 0, NULL, 0),
SND_SOC_DAPM_OUTPUT("OUT4"),
SND_SOC_DAPM_MIXER("Playback Mixer", WM8753_PWR4, 3, 0,
    &wm8753_record_mixer_controls[0],
    ARRAY_SIZE(wm8753_record_mixer_controls)),
SND_SOC_DAPM_ADC("Left ADC", "Left Capture", WM8753_PWR2, 3, 0),
SND_SOC_DAPM_ADC("Right ADC", "Right Capture", WM8753_PWR2, 2, 0),
SND_SOC_DAPM_MUX("Capture Left Mixer", SND_SOC_NOPM, 0, 0,
    &wm8753_adc_mono_controls),
SND_SOC_DAPM_MUX("Capture Right Mixer", SND_SOC_NOPM, 0, 0,
    &wm8753_adc_mono_controls),
SND_SOC_DAPM_MUX("Capture Left Mux", SND_SOC_NOPM, 0, 0,
    &wm8753_adc_left_controls),
SND_SOC_DAPM_MUX("Capture Right Mux", SND_SOC_NOPM, 0, 0,
    &wm8753_adc_right_controls),
SND_SOC_DAPM_MUX("Mic Sidetone Mux", SND_SOC_NOPM, 0, 0,
    &wm8753_mic_mux_controls),
SND_SOC_DAPM_PGA("Left Capture Volume", WM8753_PWR2, 5, 0, NULL, 0),
SND_SOC_DAPM_PGA("Right Capture Volume", WM8753_PWR2, 4, 0, NULL, 0),
SND_SOC_DAPM_MIXER("ALC Mixer", WM8753_PWR2, 6, 0,
    &wm8753_alc_mixer_controls[0], ARRAY_SIZE(wm8753_alc_mixer_controls)),
SND_SOC_DAPM_MUX("Line Left Mux", SND_SOC_NOPM, 0, 0,
    &wm8753_line_left_controls),
SND_SOC_DAPM_MUX("Line Right Mux", SND_SOC_NOPM, 0, 0,
    &wm8753_line_right_controls),
SND_SOC_DAPM_MUX("Line Mono Mux", SND_SOC_NOPM, 0, 0,
    &wm8753_line_mono_controls),
SND_SOC_DAPM_MUX("Line Mixer", WM8753_PWR2, 0, 0,
    &wm8753_line_mux_mix_controls),
SND_SOC_DAPM_MUX("Rx Mixer", WM8753_PWR2, 1, 0,
    &wm8753_rx_mux_mix_controls),
SND_SOC_DAPM_PGA("Mic 1 Volume", WM8753_PWR2, 8, 0, NULL, 0),
SND_SOC_DAPM_PGA("Mic 2 Volume", WM8753_PWR2, 7, 0, NULL, 0),
SND_SOC_DAPM_MUX("Mic Selection Mux", SND_SOC_NOPM, 0, 0,
    &wm8753_mic_sel_mux_controls),
SND_SOC_DAPM_INPUT("LINE1"),
SND_SOC_DAPM_INPUT("LINE2"),
SND_SOC_DAPM_INPUT("RXP"),
SND_SOC_DAPM_INPUT("RXN"),
SND_SOC_DAPM_INPUT("ACIN"),
SND_SOC_DAPM_OUTPUT("ACOP"),
SND_SOC_DAPM_INPUT("MIC1N"),
SND_SOC_DAPM_INPUT("MIC1"),
SND_SOC_DAPM_INPUT("MIC2N"),
SND_SOC_DAPM_INPUT("MIC2"),
SND_SOC_DAPM_VMID("VREF"),
};

static const struct snd_soc_dapm_route wm8753_dapm_routes[] = {
    /* left mixer */
    {"Left Mixer", "Left Playback Switch", "Left DAC"},
    {"Left Mixer", "Voice Playback Switch", "Voice DAC"},
    {"Left Mixer", "Sidetone Playback Switch", "Mic Sidetone Mux"},
    {"Left Mixer", "Bypass Playback Switch", "Line Left Mux"},

    /* right mixer */
    {"Right Mixer", "Right Playback Switch", "Right DAC"},
    {"Right Mixer", "Voice Playback Switch", "Voice DAC"},
    {"Right Mixer", "Sidetone Playback Switch", "Mic Sidetone Mux"},
    {"Right Mixer", "Bypass Playback Switch", "Line Right Mux"},

    /* mono mixer */
    {"Mono Mixer", "Voice Playback Switch", "Voice DAC"},
    {"Mono Mixer", "Left Playback Switch", "Left DAC"},
    {"Mono Mixer", "Right Playback Switch", "Right DAC"},
    {"Mono Mixer", "Sidetone Playback Switch", "Mic Sidetone Mux"},
    {"Mono Mixer", "Bypass Playback Switch", "Line Mono Mux"},

    /* left out */
    {"Left Out 1", NULL, "Left Mixer"},
    {"Left Out 2", NULL, "Left Mixer"},
    {"LOUT1", NULL, "Left Out 1"},
    {"LOUT2", NULL, "Left Out 2"},

    /* right out */
    {"Right Out 1", NULL, "Right Mixer"},
    {"Right Out 2", NULL, "Right Mixer"},
    {"ROUT1", NULL, "Right Out 1"},
    {"ROUT2", NULL, "Right Out 2"},

    /* mono 1 out */
    {"Mono Out 1", NULL, "Mono Mixer"},
    {"MONO1", NULL, "Mono Out 1"},

    /* mono 2 out */
    {"Mono 2 Mux", "Left + Right", "Out3 Left + Right"},
    {"Mono 2 Mux", "Inverted Mono 1", "MONO1"},
    {"Mono 2 Mux", "Left", "Left Mixer"},
    {"Mono 2 Mux", "Right", "Right Mixer"},
    {"Mono Out 2", NULL, "Mono 2 Mux"},
    {"MONO2", NULL, "Mono Out 2"},

    /* out 3 */
    {"Out3 Left + Right", NULL, "Left Mixer"},
    {"Out3 Left + Right", NULL, "Right Mixer"},
    {"Out3 Mux", "VREF", "VREF"},
    {"Out3 Mux", "Left + Right", "Out3 Left + Right"},
    {"Out3 Mux", "ROUT2", "ROUT2"},
    {"Out 3", NULL, "Out3 Mux"},
    {"OUT3", NULL, "Out 3"},

    /* out 4 */
    {"Out4 Mux", "VREF", "VREF"},
    {"Out4 Mux", "Capture ST", "Playback Mixer"},
    {"Out4 Mux", "LOUT2", "LOUT2"},
    {"Out 4", NULL, "Out4 Mux"},
    {"OUT4", NULL, "Out 4"},

    /* record mixer  */
    {"Playback Mixer", "Left Capture Switch", "Left Mixer"},
    {"Playback Mixer", "Voice Capture Switch", "Mono Mixer"},
    {"Playback Mixer", "Right Capture Switch", "Right Mixer"},

    /* Mic/SideTone Mux */
    {"Mic Sidetone Mux", "Left PGA", "Left Capture Volume"},
    {"Mic Sidetone Mux", "Right PGA", "Right Capture Volume"},
    {"Mic Sidetone Mux", "Mic 1", "Mic 1 Volume"},
    {"Mic Sidetone Mux", "Mic 2", "Mic 2 Volume"},

    /* Capture Left Mux */
    {"Capture Left Mux", "PGA", "Left Capture Volume"},
    {"Capture Left Mux", "Line or RXP-RXN", "Line Left Mux"},
    {"Capture Left Mux", "Line", "LINE1"},

    /* Capture Right Mux */
    {"Capture Right Mux", "PGA", "Right Capture Volume"},
    {"Capture Right Mux", "Line or RXP-RXN", "Line Right Mux"},
    {"Capture Right Mux", "Sidetone", "Playback Mixer"},

    /* Mono Capture mixer-mux */
    {"Capture Right Mixer", "Stereo", "Capture Right Mux"},
    {"Capture Left Mixer", "Stereo", "Capture Left Mux"},
    {"Capture Left Mixer", "Analogue Mix Left", "Capture Left Mux"},
    {"Capture Left Mixer", "Analogue Mix Left", "Capture Right Mux"},
    {"Capture Right Mixer", "Analogue Mix Right", "Capture Left Mux"},
    {"Capture Right Mixer", "Analogue Mix Right", "Capture Right Mux"},
    {"Capture Left Mixer", "Digital Mono Mix", "Capture Left Mux"},
    {"Capture Left Mixer", "Digital Mono Mix", "Capture Right Mux"},
    {"Capture Right Mixer", "Digital Mono Mix", "Capture Left Mux"},
    {"Capture Right Mixer", "Digital Mono Mix", "Capture Right Mux"},

    /* ADC */
    {"Left ADC", NULL, "Capture Left Mixer"},
    {"Right ADC", NULL, "Capture Right Mixer"},

    /* Left Capture Volume */
    {"Left Capture Volume", NULL, "ACIN"},

    /* Right Capture Volume */
    {"Right Capture Volume", NULL, "Mic 2 Volume"},

    /* ALC Mixer */
    {"ALC Mixer", "Line Capture Switch", "Line Mixer"},
    {"ALC Mixer", "Mic2 Capture Switch", "Mic 2 Volume"},
    {"ALC Mixer", "Mic1 Capture Switch", "Mic 1 Volume"},
    {"ALC Mixer", "Rx Capture Switch", "Rx Mixer"},

    /* Line Left Mux */
    {"Line Left Mux", "Line 1", "LINE1"},
    {"Line Left Mux", "Rx Mix", "Rx Mixer"},

    /* Line Right Mux */
    {"Line Right Mux", "Line 2", "LINE2"},
    {"Line Right Mux", "Rx Mix", "Rx Mixer"},

    /* Line Mono Mux */
    {"Line Mono Mux", "Line Mix", "Line Mixer"},
    {"Line Mono Mux", "Rx Mix", "Rx Mixer"},

    /* Line Mixer/Mux */
    {"Line Mixer", "Line 1 + 2", "LINE1"},
    {"Line Mixer", "Line 1 - 2", "LINE1"},
    {"Line Mixer", "Line 1 + 2", "LINE2"},
    {"Line Mixer", "Line 1 - 2", "LINE2"},
    {"Line Mixer", "Line 1", "LINE1"},
    {"Line Mixer", "Line 2", "LINE2"},

    /* Rx Mixer/Mux */
    {"Rx Mixer", "RXP - RXN", "RXP"},
    {"Rx Mixer", "RXP + RXN", "RXP"},
    {"Rx Mixer", "RXP - RXN", "RXN"},
    {"Rx Mixer", "RXP + RXN", "RXN"},
    {"Rx Mixer", "RXP", "RXP"},
    {"Rx Mixer", "RXN", "RXN"},

    /* Mic 1 Volume */
    {"Mic 1 Volume", NULL, "MIC1N"},
    {"Mic 1 Volume", NULL, "Mic Selection Mux"},

    /* Mic 2 Volume */
    {"Mic 2 Volume", NULL, "MIC2N"},
    {"Mic 2 Volume", NULL, "MIC2"},

    /* Mic Selector Mux */
    {"Mic Selection Mux", "Mic 1", "MIC1"},
    {"Mic Selection Mux", "Mic 2", "MIC2N"},
    {"Mic Selection Mux", "Mic 3", "MIC2"},

    /* ACOP */
    {"ACOP", NULL, "ALC Mixer"},
};

/* PLL divisors */
struct _pll_div {
    u32 div2:1;
    u32 n:4;
    u32 k:24;
};

/* The size in bits of the pll divide multiplied by 10
 * to allow rounding later */
#define FIXED_PLL_SIZE ((1 << 22) * 10)

static void pll_factors(struct _pll_div *pll_div, unsigned int target,
    unsigned int source)
{
    u64 Kpart;
    unsigned int K, Ndiv, Nmod;

    Ndiv = target / source;
    if (Ndiv < 6) {
        source >>= 1;
        pll_div->div2 = 1;
        Ndiv = target / source;
    } else
        pll_div->div2 = 0;

    if ((Ndiv < 6) || (Ndiv > 12))
        printk(KERN_WARNING
            "wm8753: unsupported N = %u\n", Ndiv);

    pll_div->n = Ndiv;
    Nmod = target % source;
    Kpart = FIXED_PLL_SIZE * (long long)Nmod;

    do_div(Kpart, source);

    K = Kpart & 0xFFFFFFFF;

    /* Check if we need to round */
    if ((K % 10) >= 5)
        K += 5;

    /* Move down to proper range now rounding is done */
    K /= 10;

    pll_div->k = K;
}

static int wm8753_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
        int source, unsigned int freq_in, unsigned int freq_out)
{
    u16 reg, enable;
    int offset;
    struct snd_soc_codec *codec = codec_dai->codec;

    if (pll_id < WM8753_PLL1 || pll_id > WM8753_PLL2)
        return -ENODEV;

    if (pll_id == WM8753_PLL1) {
        offset = 0;
        enable = 0x10;
        reg = snd_soc_read(codec, WM8753_CLOCK) & 0xffef;
    } else {
        offset = 4;
        enable = 0x8;
        reg = snd_soc_read(codec, WM8753_CLOCK) & 0xfff7;
    }

    if (!freq_in || !freq_out) {
        /* disable PLL  */
        snd_soc_write(codec, WM8753_PLL1CTL1 + offset, 0x0026);
        snd_soc_write(codec, WM8753_CLOCK, reg);
        return 0;
    } else {
        u16 value = 0;
        struct _pll_div pll_div;

        pll_factors(&pll_div, freq_out * 8, freq_in);

        /* set up N and K PLL divisor ratios */
        /* bits 8:5 = PLL_N, bits 3:0 = PLL_K[21:18] */
        value = (pll_div.n << 5) + ((pll_div.k & 0x3c0000) >> 18);
        snd_soc_write(codec, WM8753_PLL1CTL2 + offset, value);

        /* bits 8:0 = PLL_K[17:9] */
        value = (pll_div.k & 0x03fe00) >> 9;
        snd_soc_write(codec, WM8753_PLL1CTL3 + offset, value);

        /* bits 8:0 = PLL_K[8:0] */
        value = pll_div.k & 0x0001ff;
        snd_soc_write(codec, WM8753_PLL1CTL4 + offset, value);

        /* set PLL as input and enable */
        snd_soc_write(codec, WM8753_PLL1CTL1 + offset, 0x0027 |
            (pll_div.div2 << 3));
        snd_soc_write(codec, WM8753_CLOCK, reg | enable);
    }
    return 0;
}

struct _coeff_div {
    u32 mclk;
    u32 rate;
    u8 sr:5;
    u8 usb:1;
};

/* codec hifi mclk (after PLL) clock divider coefficients */
static const struct _coeff_div coeff_div[] = {
    /* 8k */
    {12288000, 8000, 0x6, 0x0},
    {11289600, 8000, 0x16, 0x0},
    {18432000, 8000, 0x7, 0x0},
    {16934400, 8000, 0x17, 0x0},
    {12000000, 8000, 0x6, 0x1},

    /* 11.025k */
    {11289600, 11025, 0x18, 0x0},
    {16934400, 11025, 0x19, 0x0},
    {12000000, 11025, 0x19, 0x1},

    /* 16k */
    {12288000, 16000, 0xa, 0x0},
    {18432000, 16000, 0xb, 0x0},
    {12000000, 16000, 0xa, 0x1},

    /* 22.05k */
    {11289600, 22050, 0x1a, 0x0},
    {16934400, 22050, 0x1b, 0x0},
    {12000000, 22050, 0x1b, 0x1},

    /* 32k */
    {12288000, 32000, 0xc, 0x0},
    {18432000, 32000, 0xd, 0x0},
    {12000000, 32000, 0xa, 0x1},

    /* 44.1k */
    {11289600, 44100, 0x10, 0x0},
    {16934400, 44100, 0x11, 0x0},
    {12000000, 44100, 0x11, 0x1},

    /* 48k */
    {12288000, 48000, 0x0, 0x0},
    {18432000, 48000, 0x1, 0x0},
    {12000000, 48000, 0x0, 0x1},

    /* 88.2k */
    {11289600, 88200, 0x1e, 0x0},
    {16934400, 88200, 0x1f, 0x0},
    {12000000, 88200, 0x1f, 0x1},

    /* 96k */
    {12288000, 96000, 0xe, 0x0},
    {18432000, 96000, 0xf, 0x0},
    {12000000, 96000, 0xe, 0x1},
};

static int get_coeff(int mclk, int rate)
{
    int i;

    for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
        if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
            return i;
    }
    return -EINVAL;
}

/*
 * Clock after PLL and dividers
 */
static int wm8753_set_dai_sysclk(struct snd_soc_dai *codec_dai,
        int clk_id, unsigned int freq, int dir)
{
    struct snd_soc_codec *codec = codec_dai->codec;
    struct wm8753_priv *wm8753 = snd_soc_codec_get_drvdata(codec);

    switch (freq) {
    case 11289600:
    case 12000000:
    case 12288000:
    case 16934400:
    case 18432000:
        if (clk_id == WM8753_MCLK) {
            wm8753->sysclk = freq;
            return 0;
        } else if (clk_id == WM8753_PCMCLK) {
            wm8753->pcmclk = freq;
            return 0;
        }
        break;
    }
    return -EINVAL;
}

/*
 * Set's ADC and Voice DAC format.
 */
static int wm8753_vdac_adc_set_dai_fmt(struct snd_soc_codec *codec,
        unsigned int fmt)
{
    u16 voice = snd_soc_read(codec, WM8753_PCM) & 0x01ec;

    /* interface format */
    switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
    case SND_SOC_DAIFMT_I2S:
        voice |= 0x0002;
        break;
    case SND_SOC_DAIFMT_RIGHT_J:
        break;
    case SND_SOC_DAIFMT_LEFT_J:
        voice |= 0x0001;
        break;
    case SND_SOC_DAIFMT_DSP_A:
        voice |= 0x0003;
        break;
    case SND_SOC_DAIFMT_DSP_B:
        voice |= 0x0013;
        break;
    default:
        return -EINVAL;
    }

    snd_soc_write(codec, WM8753_PCM, voice);
    return 0;
}

/*
 * Set PCM DAI bit size and sample rate.
 */
static int wm8753_pcm_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;
    struct wm8753_priv *wm8753 = snd_soc_codec_get_drvdata(codec);
    u16 voice = snd_soc_read(codec, WM8753_PCM) & 0x01f3;
    u16 srate = snd_soc_read(codec, WM8753_SRATE1) & 0x017f;

    /* bit size */
    switch (params_format(params)) {
    case SNDRV_PCM_FORMAT_S16_LE:
        break;
    case SNDRV_PCM_FORMAT_S20_3LE:
        voice |= 0x0004;
        break;
    case SNDRV_PCM_FORMAT_S24_LE:
        voice |= 0x0008;
        break;
    case SNDRV_PCM_FORMAT_S32_LE:
        voice |= 0x000c;
        break;
    }

    /* sample rate */
    if (params_rate(params) * 384 == wm8753->pcmclk)
        srate |= 0x80;
    snd_soc_write(codec, WM8753_SRATE1, srate);

    snd_soc_write(codec, WM8753_PCM, voice);
    return 0;
}

/*
 * Set's PCM dai fmt and BCLK.
 */
static int wm8753_pcm_set_dai_fmt(struct snd_soc_codec *codec,
        unsigned int fmt)
{
    u16 voice, ioctl;

    voice = snd_soc_read(codec, WM8753_PCM) & 0x011f;
    ioctl = snd_soc_read(codec, WM8753_IOCTL) & 0x015d;

    /* set master/slave audio interface */
    switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
    case SND_SOC_DAIFMT_CBS_CFS:
        break;
    case SND_SOC_DAIFMT_CBM_CFM:
        ioctl |= 0x2;
    case SND_SOC_DAIFMT_CBM_CFS:
        voice |= 0x0040;
        break;
    default:
        return -EINVAL;
    }

    /* clock inversion */
    switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
    case SND_SOC_DAIFMT_DSP_A:
    case SND_SOC_DAIFMT_DSP_B:
        /* frame inversion not valid for DSP modes */
        switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
        case SND_SOC_DAIFMT_NB_NF:
            break;
        case SND_SOC_DAIFMT_IB_NF:
            voice |= 0x0080;
            break;
        default:
            return -EINVAL;
        }
        break;
    case SND_SOC_DAIFMT_I2S:
    case SND_SOC_DAIFMT_RIGHT_J:
    case SND_SOC_DAIFMT_LEFT_J:
        voice &= ~0x0010;
        switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
        case SND_SOC_DAIFMT_NB_NF:
            break;
        case SND_SOC_DAIFMT_IB_IF:
            voice |= 0x0090;
            break;
        case SND_SOC_DAIFMT_IB_NF:
            voice |= 0x0080;
            break;
        case SND_SOC_DAIFMT_NB_IF:
            voice |= 0x0010;
            break;
        default:
            return -EINVAL;
        }
        break;
    default:
        return -EINVAL;
    }

    snd_soc_write(codec, WM8753_PCM, voice);
    snd_soc_write(codec, WM8753_IOCTL, ioctl);
    return 0;
}

static int wm8753_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
        int div_id, int div)
{
    struct snd_soc_codec *codec = codec_dai->codec;
    u16 reg;

    switch (div_id) {
    case WM8753_PCMDIV:
        reg = snd_soc_read(codec, WM8753_CLOCK) & 0x003f;
        snd_soc_write(codec, WM8753_CLOCK, reg | div);
        break;
    case WM8753_BCLKDIV:
        reg = snd_soc_read(codec, WM8753_SRATE2) & 0x01c7;
        snd_soc_write(codec, WM8753_SRATE2, reg | div);
        break;
    case WM8753_VXCLKDIV:
        reg = snd_soc_read(codec, WM8753_SRATE2) & 0x003f;
        snd_soc_write(codec, WM8753_SRATE2, reg | div);
        break;
    default:
        return -EINVAL;
    }
    return 0;
}

/*
 * Set's HiFi DAC format.
 */
static int wm8753_hdac_set_dai_fmt(struct snd_soc_codec *codec,
        unsigned int fmt)
{
    u16 hifi = snd_soc_read(codec, WM8753_HIFI) & 0x01e0;

    /* interface format */
    switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
    case SND_SOC_DAIFMT_I2S:
        hifi |= 0x0002;
        break;
    case SND_SOC_DAIFMT_RIGHT_J:
        break;
    case SND_SOC_DAIFMT_LEFT_J:
        hifi |= 0x0001;
        break;
    case SND_SOC_DAIFMT_DSP_A:
        hifi |= 0x0003;
        break;
    case SND_SOC_DAIFMT_DSP_B:
        hifi |= 0x0013;
        break;
    default:
        return -EINVAL;
    }

    snd_soc_write(codec, WM8753_HIFI, hifi);
    return 0;
}

/*
 * Set's I2S DAI format.
 */
static int wm8753_i2s_set_dai_fmt(struct snd_soc_codec *codec,
        unsigned int fmt)
{
    u16 ioctl, hifi;

    hifi = snd_soc_read(codec, WM8753_HIFI) & 0x011f;
    ioctl = snd_soc_read(codec, WM8753_IOCTL) & 0x00ae;

    /* set master/slave audio interface */
    switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
    case SND_SOC_DAIFMT_CBS_CFS:
        break;
    case SND_SOC_DAIFMT_CBM_CFM:
        ioctl |= 0x1;
    case SND_SOC_DAIFMT_CBM_CFS:
        hifi |= 0x0040;
        break;
    default:
        return -EINVAL;
    }

    /* clock inversion */
    switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
    case SND_SOC_DAIFMT_DSP_A:
    case SND_SOC_DAIFMT_DSP_B:
        /* frame inversion not valid for DSP modes */
        switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
        case SND_SOC_DAIFMT_NB_NF:
            break;
        case SND_SOC_DAIFMT_IB_NF:
            hifi |= 0x0080;
            break;
        default:
            return -EINVAL;
        }
        break;
    case SND_SOC_DAIFMT_I2S:
    case SND_SOC_DAIFMT_RIGHT_J:
    case SND_SOC_DAIFMT_LEFT_J:
        hifi &= ~0x0010;
        switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
        case SND_SOC_DAIFMT_NB_NF:
            break;
        case SND_SOC_DAIFMT_IB_IF:
            hifi |= 0x0090;
            break;
        case SND_SOC_DAIFMT_IB_NF:
            hifi |= 0x0080;
            break;
        case SND_SOC_DAIFMT_NB_IF:
            hifi |= 0x0010;
            break;
        default:
            return -EINVAL;
        }
        break;
    default:
        return -EINVAL;
    }

    snd_soc_write(codec, WM8753_HIFI, hifi);
    snd_soc_write(codec, WM8753_IOCTL, ioctl);
    return 0;
}

/*
 * Set PCM DAI bit size and sample rate.
 */
static int wm8753_i2s_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;
    struct wm8753_priv *wm8753 = snd_soc_codec_get_drvdata(codec);
    u16 srate = snd_soc_read(codec, WM8753_SRATE1) & 0x01c0;
    u16 hifi = snd_soc_read(codec, WM8753_HIFI) & 0x01f3;
    int coeff;

    /* is digital filter coefficient valid ? */
    coeff = get_coeff(wm8753->sysclk, params_rate(params));
    if (coeff < 0) {
        printk(KERN_ERR "wm8753 invalid MCLK or rate\n");
        return coeff;
    }
    snd_soc_write(codec, WM8753_SRATE1, srate | (coeff_div[coeff].sr << 1) |
        coeff_div[coeff].usb);

    /* bit size */
    switch (params_format(params)) {
    case SNDRV_PCM_FORMAT_S16_LE:
        break;
    case SNDRV_PCM_FORMAT_S20_3LE:
        hifi |= 0x0004;
        break;
    case SNDRV_PCM_FORMAT_S24_LE:
        hifi |= 0x0008;
        break;
    case SNDRV_PCM_FORMAT_S32_LE:
        hifi |= 0x000c;
        break;
    }

    snd_soc_write(codec, WM8753_HIFI, hifi);
    return 0;
}

static int wm8753_mode1v_set_dai_fmt(struct snd_soc_codec *codec,
        unsigned int fmt)
{
    u16 clock;

    /* set clk source as pcmclk */
    clock = snd_soc_read(codec, WM8753_CLOCK) & 0xfffb;
    snd_soc_write(codec, WM8753_CLOCK, clock);

    return wm8753_vdac_adc_set_dai_fmt(codec, fmt);
}

static int wm8753_mode1h_set_dai_fmt(struct snd_soc_codec *codec,
        unsigned int fmt)
{
    return wm8753_hdac_set_dai_fmt(codec, fmt);
}

static int wm8753_mode2_set_dai_fmt(struct snd_soc_codec *codec,
        unsigned int fmt)
{
    u16 clock;

    /* set clk source as pcmclk */
    clock = snd_soc_read(codec, WM8753_CLOCK) & 0xfffb;
    snd_soc_write(codec, WM8753_CLOCK, clock);

    return wm8753_vdac_adc_set_dai_fmt(codec, fmt);
}

static int wm8753_mode3_4_set_dai_fmt(struct snd_soc_codec *codec,
        unsigned int fmt)
{
    u16 clock;

    /* set clk source as mclk */
    clock = snd_soc_read(codec, WM8753_CLOCK) & 0xfffb;
    snd_soc_write(codec, WM8753_CLOCK, clock | 0x4);

    if (wm8753_hdac_set_dai_fmt(codec, fmt) < 0)
        return -EINVAL;
    return wm8753_vdac_adc_set_dai_fmt(codec, fmt);
}

static int wm8753_hifi_write_dai_fmt(struct snd_soc_codec *codec,
        unsigned int fmt)
{
    struct wm8753_priv *wm8753 = snd_soc_codec_get_drvdata(codec);
    int ret = 0;

    switch (wm8753->dai_func) {
    case 0:
        ret = wm8753_mode1h_set_dai_fmt(codec, fmt);
        break;
    case 1:
        ret = wm8753_mode2_set_dai_fmt(codec, fmt);
        break;
    case 2:
    case 3:
        ret = wm8753_mode3_4_set_dai_fmt(codec, fmt);
        break;
    default:
         break;
    }
    if (ret)
        return ret;

    return wm8753_i2s_set_dai_fmt(codec, fmt);
}

static int wm8753_hifi_set_dai_fmt(struct snd_soc_dai *codec_dai,
        unsigned int fmt)
{
    struct snd_soc_codec *codec = codec_dai->codec;
    struct wm8753_priv *wm8753 = snd_soc_codec_get_drvdata(codec);

    wm8753->hifi_fmt = fmt;

    return wm8753_hifi_write_dai_fmt(codec, fmt);
};

static int wm8753_voice_write_dai_fmt(struct snd_soc_codec *codec,
        unsigned int fmt)
{
    struct wm8753_priv *wm8753 = snd_soc_codec_get_drvdata(codec);
    int ret = 0;

    if (wm8753->dai_func != 0)
        return 0;

    ret = wm8753_mode1v_set_dai_fmt(codec, fmt);
    if (ret)
        return ret;
    ret = wm8753_pcm_set_dai_fmt(codec, fmt);
    if (ret)
        return ret;

    return 0;
};

static int wm8753_voice_set_dai_fmt(struct snd_soc_dai *codec_dai,
        unsigned int fmt)
{
    struct snd_soc_codec *codec = codec_dai->codec;
    struct wm8753_priv *wm8753 = snd_soc_codec_get_drvdata(codec);

    wm8753->voice_fmt = fmt;

    return wm8753_voice_write_dai_fmt(codec, fmt);
};

static int wm8753_mute(struct snd_soc_dai *dai, int mute)
{
    struct snd_soc_codec *codec = dai->codec;
    u16 mute_reg = snd_soc_read(codec, WM8753_DAC) & 0xfff7;
    struct wm8753_priv *wm8753 = snd_soc_codec_get_drvdata(codec);

    /* the digital mute covers the HiFi and Voice DAC's on the WM8753.
     * make sure we check if they are not both active when we mute */
    if (mute && wm8753->dai_func == 1) {
        if (!codec->active)
            snd_soc_write(codec, WM8753_DAC, mute_reg | 0x8);
    } else {
        if (mute)
            snd_soc_write(codec, WM8753_DAC, mute_reg | 0x8);
        else
            snd_soc_write(codec, WM8753_DAC, mute_reg);
    }

    return 0;
}

static int wm8753_set_bias_level(struct snd_soc_codec *codec,
                 enum snd_soc_bias_level level)
{
    u16 pwr_reg = snd_soc_read(codec, WM8753_PWR1) & 0xfe3e;

    switch (level) {
    case SND_SOC_BIAS_ON:
        /* set vmid to 50k and unmute dac */
        snd_soc_write(codec, WM8753_PWR1, pwr_reg | 0x00c0);
        break;
    case SND_SOC_BIAS_PREPARE:
        /* set vmid to 5k for quick power up */
        snd_soc_write(codec, WM8753_PWR1, pwr_reg | 0x01c1);
        break;
    case SND_SOC_BIAS_STANDBY:
        /* mute dac and set vmid to 500k, enable VREF */
        snd_soc_write(codec, WM8753_PWR1, pwr_reg | 0x0141);
        break;
    case SND_SOC_BIAS_OFF:
        snd_soc_write(codec, WM8753_PWR1, 0x0001);
        break;
    }
    codec->dapm.bias_level = level;
    return 0;
}

#define WM8753_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
        SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
        SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
        SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)

#define WM8753_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
    SNDRV_PCM_FMTBIT_S24_LE)

/*
 * The WM8753 supports up to 4 different and mutually exclusive DAI
 * configurations. This gives 2 PCM's available for use, hifi and voice.
 * NOTE: The Voice PCM cannot play or capture audio to the CPU as it's DAI
 * is connected between the wm8753 and a BT codec or GSM modem.
 *
 * 1. Voice over PCM DAI - HIFI DAC over HIFI DAI
 * 2. Voice over HIFI DAI - HIFI disabled
 * 3. Voice disabled - HIFI over HIFI
 * 4. Voice disabled - HIFI over HIFI, uses voice DAI LRC for capture
 */
static const struct snd_soc_dai_ops wm8753_dai_ops_hifi_mode = {
    .hw_params  = wm8753_i2s_hw_params,
    .digital_mute   = wm8753_mute,
    .set_fmt    = wm8753_hifi_set_dai_fmt,
    .set_clkdiv = wm8753_set_dai_clkdiv,
    .set_pll    = wm8753_set_dai_pll,
    .set_sysclk = wm8753_set_dai_sysclk,
};

static const struct snd_soc_dai_ops wm8753_dai_ops_voice_mode = {
    .hw_params  = wm8753_pcm_hw_params,
    .digital_mute   = wm8753_mute,
    .set_fmt    = wm8753_voice_set_dai_fmt,
    .set_clkdiv = wm8753_set_dai_clkdiv,
    .set_pll    = wm8753_set_dai_pll,
    .set_sysclk = wm8753_set_dai_sysclk,
};

static struct snd_soc_dai_driver wm8753_dai[] = {
/* DAI HiFi mode 1 */
{   .name = "wm8753-hifi",
    .playback = {
        .stream_name = "HiFi Playback",
        .channels_min = 1,
        .channels_max = 2,
        .rates = WM8753_RATES,
        .formats = WM8753_FORMATS
    },
    .capture = { /* dummy for fast DAI switching */
        .stream_name = "Capture",
        .channels_min = 1,
        .channels_max = 2,
        .rates = WM8753_RATES,
        .formats = WM8753_FORMATS
    },
    .ops = &wm8753_dai_ops_hifi_mode,
},
/* DAI Voice mode 1 */
{   .name = "wm8753-voice",
    .playback = {
        .stream_name = "Voice Playback",
        .channels_min = 1,
        .channels_max = 1,
        .rates = WM8753_RATES,
        .formats = WM8753_FORMATS,
    },
    .capture = {
        .stream_name = "Capture",
        .channels_min = 1,
        .channels_max = 2,
        .rates = WM8753_RATES,
        .formats = WM8753_FORMATS,
    },
    .ops = &wm8753_dai_ops_voice_mode,
},
};

static void wm8753_work(struct work_struct *work)
{
    struct snd_soc_dapm_context *dapm =
        container_of(work, struct snd_soc_dapm_context,
                 delayed_work.work);
    struct snd_soc_codec *codec = dapm->codec;
    wm8753_set_bias_level(codec, dapm->bias_level);
}

static int wm8753_suspend(struct snd_soc_codec *codec)
{
    wm8753_set_bias_level(codec, SND_SOC_BIAS_OFF);
    codec->cache_sync = 1;
    return 0;
}

static int wm8753_resume(struct snd_soc_codec *codec)
{
    struct wm8753_priv *wm8753 = snd_soc_codec_get_drvdata(codec);

    regcache_sync(wm8753->regmap);

    wm8753_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

    /* charge wm8753 caps */
    if (codec->dapm.suspend_bias_level == SND_SOC_BIAS_ON) {
        wm8753_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
        codec->dapm.bias_level = SND_SOC_BIAS_ON;
        schedule_delayed_work(&codec->dapm.delayed_work,
            msecs_to_jiffies(caps_charge));
    }

    return 0;
}

static int wm8753_probe(struct snd_soc_codec *codec)
{
    struct wm8753_priv *wm8753 = snd_soc_codec_get_drvdata(codec);
    int ret;

    INIT_DELAYED_WORK(&codec->dapm.delayed_work, wm8753_work);

    codec->control_data = wm8753->regmap;
    ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_REGMAP);
    if (ret < 0) {
        dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
        return ret;
    }

    ret = wm8753_reset(codec);
    if (ret < 0) {
        dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
        return ret;
    }

    wm8753_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
    wm8753->dai_func = 0;

    /* charge output caps */
    wm8753_set_bias_level(codec, SND_SOC_BIAS_PREPARE);
    schedule_delayed_work(&codec->dapm.delayed_work,
                  msecs_to_jiffies(caps_charge));

    /* set the update bits */
    snd_soc_update_bits(codec, WM8753_LDAC, 0x0100, 0x0100);
    snd_soc_update_bits(codec, WM8753_RDAC, 0x0100, 0x0100);
    snd_soc_update_bits(codec, WM8753_LADC, 0x0100, 0x0100);
    snd_soc_update_bits(codec, WM8753_RADC, 0x0100, 0x0100);
    snd_soc_update_bits(codec, WM8753_LOUT1V, 0x0100, 0x0100);
    snd_soc_update_bits(codec, WM8753_ROUT1V, 0x0100, 0x0100);
    snd_soc_update_bits(codec, WM8753_LOUT2V, 0x0100, 0x0100);
    snd_soc_update_bits(codec, WM8753_ROUT2V, 0x0100, 0x0100);
    snd_soc_update_bits(codec, WM8753_LINVOL, 0x0100, 0x0100);
    snd_soc_update_bits(codec, WM8753_RINVOL, 0x0100, 0x0100);

    return 0;
}

/* power down chip */
static int wm8753_remove(struct snd_soc_codec *codec)
{
    flush_delayed_work(&codec->dapm.delayed_work);
    wm8753_set_bias_level(codec, SND_SOC_BIAS_OFF);

    return 0;
}

static struct snd_soc_codec_driver soc_codec_dev_wm8753 = {
    .probe =    wm8753_probe,
    .remove =   wm8753_remove,
    .suspend =  wm8753_suspend,
    .resume =   wm8753_resume,
    .set_bias_level = wm8753_set_bias_level,

    .controls = wm8753_snd_controls,
    .num_controls = ARRAY_SIZE(wm8753_snd_controls),
    .dapm_widgets = wm8753_dapm_widgets,
    .num_dapm_widgets = ARRAY_SIZE(wm8753_dapm_widgets),
    .dapm_routes = wm8753_dapm_routes,
    .num_dapm_routes = ARRAY_SIZE(wm8753_dapm_routes),
};

static const struct of_device_id wm8753_of_match[] = {
    { .compatible = "wlf,wm8753", },
    { }
};
MODULE_DEVICE_TABLE(of, wm8753_of_match);

static const struct regmap_config wm8753_regmap = {
    .reg_bits = 7,
    .val_bits = 9,

    .max_register = WM8753_ADCTL2,
    .writeable_reg = wm8753_writeable,
    .volatile_reg = wm8753_volatile,

    .cache_type = REGCACHE_RBTREE,
    .reg_defaults = wm8753_reg_defaults,
    .num_reg_defaults = ARRAY_SIZE(wm8753_reg_defaults),
};

#if defined(CONFIG_SPI_MASTER)
static int __devinit wm8753_spi_probe(struct spi_device *spi)
{
    struct wm8753_priv *wm8753;
    int ret;

    wm8753 = devm_kzalloc(&spi->dev, sizeof(struct wm8753_priv),
                  GFP_KERNEL);
    if (wm8753 == NULL)
        return -ENOMEM;

    spi_set_drvdata(spi, wm8753);

    wm8753->regmap = regmap_init_spi(spi, &wm8753_regmap);
    if (IS_ERR(wm8753->regmap)) {
        ret = PTR_ERR(wm8753->regmap);
        dev_err(&spi->dev, "Failed to allocate register map: %d\n",
            ret);
        goto err;
    }

    ret = snd_soc_register_codec(&spi->dev, &soc_codec_dev_wm8753,
                     wm8753_dai, ARRAY_SIZE(wm8753_dai));
    if (ret != 0) {
        dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret);
        goto err_regmap;
    }

    return 0;

err_regmap:
    regmap_exit(wm8753->regmap);
err:
    return ret;
}

static int __devexit wm8753_spi_remove(struct spi_device *spi)
{
    struct wm8753_priv *wm8753 = spi_get_drvdata(spi);

    snd_soc_unregister_codec(&spi->dev);
    regmap_exit(wm8753->regmap);
    kfree(wm8753);
    return 0;
}

static struct spi_driver wm8753_spi_driver = {
    .driver = {
        .name   = "wm8753",
        .owner  = THIS_MODULE,
        .of_match_table = wm8753_of_match,
    },
    .probe      = wm8753_spi_probe,
    .remove     = __devexit_p(wm8753_spi_remove),
};
#endif /* CONFIG_SPI_MASTER */

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static __devinit int wm8753_i2c_probe(struct i2c_client *i2c,
                      const struct i2c_device_id *id)
{
    struct wm8753_priv *wm8753;
    int ret;

    wm8753 = devm_kzalloc(&i2c->dev, sizeof(struct wm8753_priv),
                  GFP_KERNEL);
    if (wm8753 == NULL)
        return -ENOMEM;

    i2c_set_clientdata(i2c, wm8753);

    wm8753->regmap = regmap_init_i2c(i2c, &wm8753_regmap);
    if (IS_ERR(wm8753->regmap)) {
        ret = PTR_ERR(wm8753->regmap);
        dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
            ret);
        goto err;
    }

    ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm8753,
                     wm8753_dai, ARRAY_SIZE(wm8753_dai));
    if (ret != 0) {
        dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
        goto err_regmap;
    }

    return 0;

err_regmap:
    regmap_exit(wm8753->regmap);
err:
    return ret;
}

static __devexit int wm8753_i2c_remove(struct i2c_client *client)
{
    struct wm8753_priv *wm8753 = i2c_get_clientdata(client);

    snd_soc_unregister_codec(&client->dev);
    regmap_exit(wm8753->regmap);
    return 0;
}

static const struct i2c_device_id wm8753_i2c_id[] = {
    { "wm8753", 0 },
    { }
};
MODULE_DEVICE_TABLE(i2c, wm8753_i2c_id);

static struct i2c_driver wm8753_i2c_driver = {
    .driver = {
        .name = "wm8753",
        .owner = THIS_MODULE,
        .of_match_table = wm8753_of_match,
    },
    .probe =    wm8753_i2c_probe,
    .remove =   __devexit_p(wm8753_i2c_remove),
    .id_table = wm8753_i2c_id,
};
#endif

static int __init wm8753_modinit(void)
{
    int ret = 0;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
    ret = i2c_add_driver(&wm8753_i2c_driver);
    if (ret != 0) {
        printk(KERN_ERR "Failed to register wm8753 I2C driver: %d\n",
               ret);
    }
#endif
#if defined(CONFIG_SPI_MASTER)
    ret = spi_register_driver(&wm8753_spi_driver);
    if (ret != 0) {
        printk(KERN_ERR "Failed to register wm8753 SPI driver: %d\n",
               ret);
    }
#endif
    return ret;
}
module_init(wm8753_modinit);

static void __exit wm8753_exit(void)
{
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
    i2c_del_driver(&wm8753_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
    spi_unregister_driver(&wm8753_spi_driver);
#endif
}
module_exit(wm8753_exit);

MODULE_DESCRIPTION("ASoC WM8753 driver");
MODULE_AUTHOR("Liam Girdwood");
MODULE_LICENSE("GPL");