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wm8753.c

/*
 * wm8753.c  --  WM8753 ALSA Soc Audio driver
 *
 * Copyright 2003 Wolfson Microelectronics PLC.
 * Author: Liam Girdwood
 *         liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.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.
 *
 * 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/version.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <sound/driver.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <asm/div64.h>

#include "wm8753.h"

#define AUDIO_NAME "wm8753"
#define WM8753_VERSION "0.16"

/*
 * Debug
 */

#define WM8753_DEBUG 0

#ifdef WM8753_DEBUG
#define dbg(format, arg...) \
      printk(KERN_DEBUG AUDIO_NAME ": " format "\n" , ## arg)
#else
#define dbg(format, arg...) do {} while (0)
#endif
#define err(format, arg...) \
      printk(KERN_ERR AUDIO_NAME ": " format "\n" , ## arg)
#define info(format, arg...) \
      printk(KERN_INFO AUDIO_NAME ": " format "\n" , ## arg)
#define warn(format, arg...) \
      printk(KERN_WARNING AUDIO_NAME ": " format "\n" , ## arg)

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

static void wm8753_set_dai_mode(struct snd_soc_codec *codec,
      unsigned int mode);

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

/*
 * 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 u16 wm8753_reg[] = {
      0x0008, 0x0000, 0x000a, 0x000a,
      0x0033, 0x0000, 0x0007, 0x00ff,
      0x00ff, 0x000f, 0x000f, 0x007b,
      0x0000, 0x0032, 0x0000, 0x00c3,
      0x00c3, 0x00c0, 0x0000, 0x0000,
      0x0000, 0x0000, 0x0000, 0x0000,
      0x0000, 0x0000, 0x0000, 0x0000,
      0x0000, 0x0000, 0x0000, 0x0055,
      0x0005, 0x0050, 0x0055, 0x0050,
      0x0055, 0x0050, 0x0055, 0x0079,
      0x0079, 0x0079, 0x0079, 0x0079,
      0x0000, 0x0000, 0x0000, 0x0000,
      0x0097, 0x0097, 0x0000, 0x0004,
      0x0000, 0x0083, 0x0024, 0x01ba,
      0x0000, 0x0083, 0x0024, 0x01ba,
      0x0000, 0x0000
};

/*
 * read wm8753 register cache
 */
static inline unsigned int wm8753_read_reg_cache(struct snd_soc_codec *codec,
      unsigned int reg)
{
      u16 *cache = codec->reg_cache;
      if (reg < 1 || reg > (ARRAY_SIZE(wm8753_reg) + 1))
            return -1;
      return cache[reg - 1];
}

/*
 * write wm8753 register cache
 */
static inline void wm8753_write_reg_cache(struct snd_soc_codec *codec,
      unsigned int reg, unsigned int value)
{
      u16 *cache = codec->reg_cache;
      if (reg < 1 || reg > 0x3f)
            return;
      cache[reg - 1] = value;
}

/*
 * write to the WM8753 register space
 */
static int wm8753_write(struct snd_soc_codec *codec, unsigned int reg,
      unsigned int value)
{
      u8 data[2];

      /* data is
       *   D15..D9 WM8753 register offset
       *   D8...D0 register data
       */
      data[0] = (reg << 1) | ((value >> 8) & 0x0001);
      data[1] = value & 0x00ff;

      wm8753_write_reg_cache (codec, reg, value);
      if (codec->hw_write(codec->control_data, data, 2) == 2)
            return 0;
      else
            return -EIO;
}

#define wm8753_reset(c) wm8753_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 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),
};


static int wm8753_get_dai(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *ucontrol)
{
      struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);
      int mode = wm8753_read_reg_cache(codec, WM8753_IOCTL);

      ucontrol->value.integer.value[0] = (mode & 0xc) >> 2;
      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);
      int mode = wm8753_read_reg_cache(codec, WM8753_IOCTL);

      if (((mode &0xc) >> 2) == ucontrol->value.integer.value[0])
            return 0;

      mode &= 0xfff3;
      mode |= (ucontrol->value.integer.value[0] << 2);

      wm8753_write(codec, WM8753_IOCTL, mode);
      wm8753_set_dai_mode(codec, ucontrol->value.integer.value[0]);
      return 1;
}

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

SOC_DOUBLE_R("ADC Capture Volume", WM8753_LADC, WM8753_RADC, 0, 255, 0),

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

SOC_SINGLE("Mono Playback Volume", WM8753_MOUTV, 0, 127, 0),

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

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("Mono Bypass Playback Volume", WM8753_MOUTM1, 4, 7, 1),
SOC_SINGLE("Mono Sidetone Playback Volume", WM8753_MOUTM2, 4, 7, 1),
SOC_SINGLE("Mono Voice Playback Volume", WM8753_MOUTM2, 4, 7, 1),
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("Sidetone Capture Volume", WM8753_RECMIX1, 0, 4, 7, 1),
SOC_SINGLE("Voice Sidetone Capture Volume", WM8753_RECMIX2, 0, 7, 1),

SOC_DOUBLE_R("Capture Volume", WM8753_LINVOL, WM8753_RINVOL, 0, 63, 0),
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("Mic2 Capture Volume", WM8753_INCTL1, 7, 3, 0),
SOC_SINGLE("Mic1 Capture Volume", WM8753_INCTL1, 5, 3, 0),

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

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

/* add non dapm controls */
static int wm8753_add_controls(struct snd_soc_codec *codec)
{
      int err, i;

      for (i = 0; i < ARRAY_SIZE(wm8753_snd_controls); i++) {
            err = snd_ctl_add(codec->card,
                        snd_soc_cnew(&wm8753_snd_controls[i],codec, NULL));
            if (err < 0)
                  return err;
      }
      return 0;
}

/*
 * _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 char *audio_map[][3] = {
      /* 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", "Capture ST 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", "Capture ST Mixer"},

      /* Mono Capture mixer-mux */
      {"Capture Right Mixer", "Stereo", "Capture Right 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"},

      /* terminator */
      {NULL, NULL, NULL},
};

static int wm8753_add_widgets(struct snd_soc_codec *codec)
{
      int i;

      for (i = 0; i < ARRAY_SIZE(wm8753_dapm_widgets); i++)
            snd_soc_dapm_new_control(codec, &wm8753_dapm_widgets[i]);

      /* set up the WM8753 audio map */
      for (i = 0; audio_map[i][0] != NULL; i++) {
            snd_soc_dapm_connect_input(codec, audio_map[i][0],
                  audio_map[i][1], audio_map[i][2]);
      }

      snd_soc_dapm_new_widgets(codec);
      return 0;
}

/* 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 N value outwith recommended range! N = %d\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_codec_dai *codec_dai,
            int pll_id, 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 = wm8753_read_reg_cache(codec, WM8753_CLOCK) & 0xffef;
      } else {
            offset = 4;
            enable = 0x8;
            reg = wm8753_read_reg_cache(codec, WM8753_CLOCK) & 0xfff7;
      }

      if (!freq_in || !freq_out) {
            /* disable PLL  */
            wm8753_write(codec, WM8753_PLL1CTL1 + offset, 0x0026);
            wm8753_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);
            wm8753_write(codec, WM8753_PLL1CTL2 + offset, value);

            /* bits 8:0 = PLL_K[17:9] */
            value = (pll_div.k & 0x03fe00) >> 9;
            wm8753_write(codec, WM8753_PLL1CTL3 + offset, value);

            /* bits 8:0 = PLL_K[8:0] */
            value = pll_div.k & 0x0001ff;
            wm8753_write(codec, WM8753_PLL1CTL4 + offset, value);

            /* set PLL as input and enable */
            wm8753_write(codec, WM8753_PLL1CTL1 + offset, 0x0027 |
                  (pll_div.div2 << 3));
            wm8753_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_codec_dai *codec_dai,
            int clk_id, unsigned int freq, int dir)
{
      struct snd_soc_codec *codec = codec_dai->codec;
      struct wm8753_priv *wm8753 = codec->private_data;

      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_dai *codec_dai,
            unsigned int fmt)
{
      struct snd_soc_codec *codec = codec_dai->codec;
      u16 voice = wm8753_read_reg_cache(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;
      }

      wm8753_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_pcm_runtime *rtd = substream->private_data;
      struct snd_soc_device *socdev = rtd->socdev;
      struct snd_soc_codec *codec = socdev->codec;
      struct wm8753_priv *wm8753 = codec->private_data;
      u16 voice = wm8753_read_reg_cache(codec, WM8753_PCM) & 0x01f3;
      u16 srate = wm8753_read_reg_cache(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;
      wm8753_write(codec, WM8753_SRATE1, srate);

      wm8753_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_dai *codec_dai,
            unsigned int fmt)
{
      struct snd_soc_codec *codec = codec_dai->codec;
      u16 voice, ioctl;

      voice = wm8753_read_reg_cache(codec, WM8753_PCM) & 0x011f;
      ioctl = wm8753_read_reg_cache(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;
      }

      wm8753_write(codec, WM8753_PCM, voice);
      wm8753_write(codec, WM8753_IOCTL, ioctl);
      return 0;
}

static int wm8753_set_dai_clkdiv(struct snd_soc_codec_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 = wm8753_read_reg_cache(codec, WM8753_CLOCK) & 0x003f;
            wm8753_write(codec, WM8753_CLOCK, reg | div);
            break;
      case WM8753_BCLKDIV:
            reg = wm8753_read_reg_cache(codec, WM8753_SRATE2) & 0x01c7;
            wm8753_write(codec, WM8753_SRATE2, reg | div);
            break;
      case WM8753_VXCLKDIV:
            reg = wm8753_read_reg_cache(codec, WM8753_SRATE2) & 0x003f;
            wm8753_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_dai *codec_dai,
            unsigned int fmt)
{
      struct snd_soc_codec *codec = codec_dai->codec;
      u16 hifi = wm8753_read_reg_cache(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;
      }

      wm8753_write(codec, WM8753_HIFI, hifi);
      return 0;
}

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

      hifi = wm8753_read_reg_cache(codec, WM8753_HIFI) & 0x011f;
      ioctl = wm8753_read_reg_cache(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;
      }

      wm8753_write(codec, WM8753_HIFI, hifi);
      wm8753_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_pcm_runtime *rtd = substream->private_data;
      struct snd_soc_device *socdev = rtd->socdev;
      struct snd_soc_codec *codec = socdev->codec;
      struct wm8753_priv *wm8753 = codec->private_data;
      u16 srate = wm8753_read_reg_cache(codec, WM8753_SRATE1) & 0x01c0;
      u16 hifi = wm8753_read_reg_cache(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;
      }
      wm8753_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;
      }

      wm8753_write(codec, WM8753_HIFI, hifi);
      return 0;
}

static int wm8753_mode1v_set_dai_fmt(struct snd_soc_codec_dai *codec_dai,
            unsigned int fmt)
{
      struct snd_soc_codec *codec = codec_dai->codec;
      u16 clock;

      /* set clk source as pcmclk */
      clock = wm8753_read_reg_cache(codec, WM8753_CLOCK) & 0xfffb;
      wm8753_write(codec, WM8753_CLOCK, clock);

      if (wm8753_vdac_adc_set_dai_fmt(codec_dai, fmt) < 0)
            return -EINVAL;
      return wm8753_pcm_set_dai_fmt(codec_dai, fmt);
}

static int wm8753_mode1h_set_dai_fmt(struct snd_soc_codec_dai *codec_dai,
            unsigned int fmt)
{
      if (wm8753_hdac_set_dai_fmt(codec_dai, fmt) < 0)
            return -EINVAL;
      return wm8753_i2s_set_dai_fmt(codec_dai, fmt);
}

static int wm8753_mode2_set_dai_fmt(struct snd_soc_codec_dai *codec_dai,
            unsigned int fmt)
{
      struct snd_soc_codec *codec = codec_dai->codec;
      u16 clock;

      /* set clk source as pcmclk */
      clock = wm8753_read_reg_cache(codec, WM8753_CLOCK) & 0xfffb;
      wm8753_write(codec, WM8753_CLOCK, clock);

      if (wm8753_vdac_adc_set_dai_fmt(codec_dai, fmt) < 0)
            return -EINVAL;
      return wm8753_i2s_set_dai_fmt(codec_dai, fmt);
}

static int wm8753_mode3_4_set_dai_fmt(struct snd_soc_codec_dai *codec_dai,
            unsigned int fmt)
{
      struct snd_soc_codec *codec = codec_dai->codec;
      u16 clock;

      /* set clk source as mclk */
      clock = wm8753_read_reg_cache(codec, WM8753_CLOCK) & 0xfffb;
      wm8753_write(codec, WM8753_CLOCK, clock | 0x4);

      if (wm8753_hdac_set_dai_fmt(codec_dai, fmt) < 0)
            return -EINVAL;
      if (wm8753_vdac_adc_set_dai_fmt(codec_dai, fmt) < 0)
            return -EINVAL;
      return wm8753_i2s_set_dai_fmt(codec_dai, fmt);
}

static int wm8753_mute(struct snd_soc_codec_dai *dai, int mute)
{
      struct snd_soc_codec *codec = dai->codec;
      u16 mute_reg = wm8753_read_reg_cache(codec, WM8753_DAC) & 0xfff7;

      /* 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 && dai->id == 1) {
            if (!wm8753_dai[WM8753_DAI_VOICE].playback.active ||
                  !wm8753_dai[WM8753_DAI_HIFI].playback.active)
                  wm8753_write(codec, WM8753_DAC, mute_reg | 0x8);
      } else {
            if (mute)
                  wm8753_write(codec, WM8753_DAC, mute_reg | 0x8);
            else
                  wm8753_write(codec, WM8753_DAC, mute_reg);
      }

      return 0;
}

static int wm8753_dapm_event(struct snd_soc_codec *codec, int event)
{
      u16 pwr_reg = wm8753_read_reg_cache(codec, WM8753_PWR1) & 0xfe3e;

      switch (event) {
      case SNDRV_CTL_POWER_D0: /* full On */
            /* set vmid to 50k and unmute dac */
            wm8753_write(codec, WM8753_PWR1, pwr_reg | 0x00c0);
            break;
      case SNDRV_CTL_POWER_D1: /* partial On */
      case SNDRV_CTL_POWER_D2: /* partial On */
            /* set vmid to 5k for quick power up */
            wm8753_write(codec, WM8753_PWR1, pwr_reg | 0x01c1);
            break;
      case SNDRV_CTL_POWER_D3hot: /* Off, with power */
            /* mute dac and set vmid to 500k, enable VREF */
            wm8753_write(codec, WM8753_PWR1, pwr_reg | 0x0141);
            break;
      case SNDRV_CTL_POWER_D3cold: /* Off, without power */
            wm8753_write(codec, WM8753_PWR1, 0x0001);
            break;
      }
      codec->dapm_state = event;
      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 upto 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_codec_dai wm8753_all_dai[] = {
/* DAI HiFi mode 1 */
{     .name = "WM8753 HiFi",
      .id = 1,
      .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 = {
            .hw_params = wm8753_i2s_hw_params,},
      .dai_ops = {
            .digital_mute = wm8753_mute,
            .set_fmt = wm8753_mode1h_set_dai_fmt,
            .set_clkdiv = wm8753_set_dai_clkdiv,
            .set_pll = wm8753_set_dai_pll,
            .set_sysclk = wm8753_set_dai_sysclk,
      },
},
/* DAI Voice mode 1 */
{     .name = "WM8753 Voice",
      .id = 1,
      .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 = {
            .hw_params = wm8753_pcm_hw_params,},
      .dai_ops = {
            .digital_mute = wm8753_mute,
            .set_fmt = wm8753_mode1v_set_dai_fmt,
            .set_clkdiv = wm8753_set_dai_clkdiv,
            .set_pll = wm8753_set_dai_pll,
            .set_sysclk = wm8753_set_dai_sysclk,
      },
},
/* DAI HiFi mode 2 - dummy */
{     .name = "WM8753 HiFi",
      .id = 2,
},
/* DAI Voice mode 2 */
{     .name = "WM8753 Voice",
      .id = 2,
      .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 = {
            .hw_params = wm8753_pcm_hw_params,},
      .dai_ops = {
            .digital_mute = wm8753_mute,
            .set_fmt = wm8753_mode2_set_dai_fmt,
            .set_clkdiv = wm8753_set_dai_clkdiv,
            .set_pll = wm8753_set_dai_pll,
            .set_sysclk = wm8753_set_dai_sysclk,
      },
},
/* DAI HiFi mode 3 */
{     .name = "WM8753 HiFi",
      .id = 3,
      .playback = {
            .stream_name = "HiFi Playback",
            .channels_min = 1,
            .channels_max = 2,
            .rates = WM8753_RATES,
            .formats = WM8753_FORMATS,},
      .capture = {
            .stream_name = "Capture",
            .channels_min = 1,
            .channels_max = 2,
            .rates = WM8753_RATES,
            .formats = WM8753_FORMATS,},
      .ops = {
            .hw_params = wm8753_i2s_hw_params,},
      .dai_ops = {
            .digital_mute = wm8753_mute,
            .set_fmt = wm8753_mode3_4_set_dai_fmt,
            .set_clkdiv = wm8753_set_dai_clkdiv,
            .set_pll = wm8753_set_dai_pll,
            .set_sysclk = wm8753_set_dai_sysclk,
      },
},
/* DAI Voice mode 3 - dummy */
{     .name = "WM8753 Voice",
      .id = 3,
},
/* DAI HiFi mode 4 */
{     .name = "WM8753 HiFi",
      .id = 4,
      .playback = {
            .stream_name = "HiFi Playback",
            .channels_min = 1,
            .channels_max = 2,
            .rates = WM8753_RATES,
            .formats = WM8753_FORMATS,},
      .capture = {
            .stream_name = "Capture",
            .channels_min = 1,
            .channels_max = 2,
            .rates = WM8753_RATES,
            .formats = WM8753_FORMATS,},
      .ops = {
            .hw_params = wm8753_i2s_hw_params,},
      .dai_ops = {
            .digital_mute = wm8753_mute,
            .set_fmt = wm8753_mode3_4_set_dai_fmt,
            .set_clkdiv = wm8753_set_dai_clkdiv,
            .set_pll = wm8753_set_dai_pll,
            .set_sysclk = wm8753_set_dai_sysclk,
      },
},
/* DAI Voice mode 4 - dummy */
{     .name = "WM8753 Voice",
      .id = 4,
},
};

struct snd_soc_codec_dai wm8753_dai[2];
EXPORT_SYMBOL_GPL(wm8753_dai);

static void wm8753_set_dai_mode(struct snd_soc_codec *codec, unsigned int mode)
{
      if (mode < 4) {
            int playback_active, capture_active, codec_active, pop_wait;
            void *private_data;

            playback_active = wm8753_dai[0].playback.active;
            capture_active = wm8753_dai[0].capture.active;
            codec_active = wm8753_dai[0].active;
            private_data = wm8753_dai[0].private_data;
            pop_wait = wm8753_dai[0].pop_wait;
            wm8753_dai[0] = wm8753_all_dai[mode << 1];
            wm8753_dai[0].playback.active = playback_active;
            wm8753_dai[0].capture.active = capture_active;
            wm8753_dai[0].active = codec_active;
            wm8753_dai[0].private_data = private_data;
            wm8753_dai[0].pop_wait = pop_wait;

            playback_active = wm8753_dai[1].playback.active;
            capture_active = wm8753_dai[1].capture.active;
            codec_active = wm8753_dai[1].active;
            private_data = wm8753_dai[1].private_data;
            pop_wait = wm8753_dai[1].pop_wait;
            wm8753_dai[1] = wm8753_all_dai[(mode << 1) + 1];
            wm8753_dai[1].playback.active = playback_active;
            wm8753_dai[1].capture.active = capture_active;
            wm8753_dai[1].active = codec_active;
            wm8753_dai[1].private_data = private_data;
            wm8753_dai[1].pop_wait = pop_wait;
      }
      wm8753_dai[0].codec = codec;
      wm8753_dai[1].codec = codec;
}

static void wm8753_work(struct work_struct *work)
{
      struct snd_soc_codec *codec =
            container_of(work, struct snd_soc_codec, delayed_work.work);
      wm8753_dapm_event(codec, codec->dapm_state);
}

static int wm8753_suspend(struct platform_device *pdev, pm_message_t state)
{
      struct snd_soc_device *socdev = platform_get_drvdata(pdev);
      struct snd_soc_codec *codec = socdev->codec;

      /* we only need to suspend if we are a valid card */
      if(!codec->card)
            return 0;
            
      wm8753_dapm_event(codec, SNDRV_CTL_POWER_D3cold);
      return 0;
}

static int wm8753_resume(struct platform_device *pdev)
{
      struct snd_soc_device *socdev = platform_get_drvdata(pdev);
      struct snd_soc_codec *codec = socdev->codec;
      int i;
      u8 data[2];
      u16 *cache = codec->reg_cache;

      /* we only need to resume if we are a valid card */
      if(!codec->card)
            return 0;

      /* Sync reg_cache with the hardware */
      for (i = 0; i < ARRAY_SIZE(wm8753_reg); i++) {
            if (i + 1 == WM8753_RESET)
                  continue;
            data[0] = ((i + 1) << 1) | ((cache[i] >> 8) & 0x0001);
            data[1] = cache[i] & 0x00ff;
            codec->hw_write(codec->control_data, data, 2);
      }

      wm8753_dapm_event(codec, SNDRV_CTL_POWER_D3hot);

      /* charge wm8753 caps */
      if (codec->suspend_dapm_state == SNDRV_CTL_POWER_D0) {
            wm8753_dapm_event(codec, SNDRV_CTL_POWER_D2);
            codec->dapm_state = SNDRV_CTL_POWER_D0;
            schedule_delayed_work(&codec->delayed_work,
                  msecs_to_jiffies(caps_charge));
      }

      return 0;
}

/*
 * initialise the WM8753 driver
 * register the mixer and dsp interfaces with the kernel
 */
static int wm8753_init(struct snd_soc_device *socdev)
{
      struct snd_soc_codec *codec = socdev->codec;
      int reg, ret = 0;

      codec->name = "WM8753";
      codec->owner = THIS_MODULE;
      codec->read = wm8753_read_reg_cache;
      codec->write = wm8753_write;
      codec->dapm_event = wm8753_dapm_event;
      codec->dai = wm8753_dai;
      codec->num_dai = 2;
      codec->reg_cache_size = sizeof(wm8753_reg);
      codec->reg_cache = kmemdup(wm8753_reg, sizeof(wm8753_reg), GFP_KERNEL);

      if (codec->reg_cache == NULL)
            return -ENOMEM;

      wm8753_set_dai_mode(codec, 0);

      wm8753_reset(codec);

      /* register pcms */
      ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
      if (ret < 0) {
            printk(KERN_ERR "wm8753: failed to create pcms\n");
            goto pcm_err;
      }

      /* charge output caps */
      wm8753_dapm_event(codec, SNDRV_CTL_POWER_D2);
      codec->dapm_state = SNDRV_CTL_POWER_D3hot;
      schedule_delayed_work(&codec->delayed_work,
            msecs_to_jiffies(caps_charge));

      /* set the update bits */
      reg = wm8753_read_reg_cache(codec, WM8753_LDAC);
      wm8753_write(codec, WM8753_LDAC, reg | 0x0100);
      reg = wm8753_read_reg_cache(codec, WM8753_RDAC);
      wm8753_write(codec, WM8753_RDAC, reg | 0x0100);
      reg = wm8753_read_reg_cache(codec, WM8753_LADC);
      wm8753_write(codec, WM8753_LADC, reg | 0x0100);
      reg = wm8753_read_reg_cache(codec, WM8753_RADC);
      wm8753_write(codec, WM8753_RADC, reg | 0x0100);
      reg = wm8753_read_reg_cache(codec, WM8753_LOUT1V);
      wm8753_write(codec, WM8753_LOUT1V, reg | 0x0100);
      reg = wm8753_read_reg_cache(codec, WM8753_ROUT1V);
      wm8753_write(codec, WM8753_ROUT1V, reg | 0x0100);
      reg = wm8753_read_reg_cache(codec, WM8753_LOUT2V);
      wm8753_write(codec, WM8753_LOUT2V, reg | 0x0100);
      reg = wm8753_read_reg_cache(codec, WM8753_ROUT2V);
      wm8753_write(codec, WM8753_ROUT2V, reg | 0x0100);
      reg = wm8753_read_reg_cache(codec, WM8753_LINVOL);
      wm8753_write(codec, WM8753_LINVOL, reg | 0x0100);
      reg = wm8753_read_reg_cache(codec, WM8753_RINVOL);
      wm8753_write(codec, WM8753_RINVOL, reg | 0x0100);

      wm8753_add_controls(codec);
      wm8753_add_widgets(codec);
      ret = snd_soc_register_card(socdev);
      if (ret < 0) {
            printk(KERN_ERR "wm8753: failed to register card\n");
            goto card_err;
    }
      return ret;

card_err:
      snd_soc_free_pcms(socdev);
      snd_soc_dapm_free(socdev);
pcm_err:
      kfree(codec->reg_cache);
      return ret;
}

/* If the i2c layer weren't so broken, we could pass this kind of data
   around */
static struct snd_soc_device *wm8753_socdev;

#if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)

/*
 * WM8753 2 wire address is determined by GPIO5
 * state during powerup.
 *    low  = 0x1a
 *    high = 0x1b
 */
static unsigned short normal_i2c[] = { 0, I2C_CLIENT_END };

/* Magic definition of all other variables and things */
I2C_CLIENT_INSMOD;

static struct i2c_driver wm8753_i2c_driver;
static struct i2c_client client_template;

static int wm8753_codec_probe(struct i2c_adapter *adap, int addr, int kind)
{
      struct snd_soc_device *socdev = wm8753_socdev;
      struct wm8753_setup_data *setup = socdev->codec_data;
      struct snd_soc_codec *codec = socdev->codec;
      struct i2c_client *i2c;
      int ret;

      if (addr != setup->i2c_address)
            return -ENODEV;

      client_template.adapter = adap;
      client_template.addr = addr;

      i2c =  kmemdup(&client_template, sizeof(client_template), GFP_KERNEL);
      if (i2c == NULL){
            kfree(codec);
            return -ENOMEM;
      }
      i2c_set_clientdata(i2c, codec);
      codec->control_data = i2c;

      ret = i2c_attach_client(i2c);
      if (ret < 0) {
            err("failed to attach codec at addr %x\n", addr);
            goto err;
      }

      ret = wm8753_init(socdev);
      if (ret < 0) {
            err("failed to initialise WM8753\n");
            goto err;
      }

      return ret;

err:
      kfree(codec);
      kfree(i2c);
      return ret;
}

static int wm8753_i2c_detach(struct i2c_client *client)
{
      struct snd_soc_codec *codec = i2c_get_clientdata(client);
      i2c_detach_client(client);
      kfree(codec->reg_cache);
      kfree(client);
      return 0;
}

static int wm8753_i2c_attach(struct i2c_adapter *adap)
{
      return i2c_probe(adap, &addr_data, wm8753_codec_probe);
}

/* corgi i2c codec control layer */
static struct i2c_driver wm8753_i2c_driver = {
      .driver = {
            .name = "WM8753 I2C Codec",
            .owner = THIS_MODULE,
      },
      .id =             I2C_DRIVERID_WM8753,
      .attach_adapter = wm8753_i2c_attach,
      .detach_client =  wm8753_i2c_detach,
      .command =        NULL,
};

static struct i2c_client client_template = {
      .name =   "WM8753",
      .driver = &wm8753_i2c_driver,
};
#endif

static int wm8753_probe(struct platform_device *pdev)
{
      struct snd_soc_device *socdev = platform_get_drvdata(pdev);
      struct wm8753_setup_data *setup;
      struct snd_soc_codec *codec;
      struct wm8753_priv *wm8753;
      int ret = 0;

      info("WM8753 Audio Codec %s", WM8753_VERSION);

      setup = socdev->codec_data;
      codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
      if (codec == NULL)
            return -ENOMEM;

      wm8753 = kzalloc(sizeof(struct wm8753_priv), GFP_KERNEL);
      if (wm8753 == NULL) {
            kfree(codec);
            return -ENOMEM;
      }

      codec->private_data = wm8753;
      socdev->codec = codec;
      mutex_init(&codec->mutex);
      INIT_LIST_HEAD(&codec->dapm_widgets);
      INIT_LIST_HEAD(&codec->dapm_paths);
      wm8753_socdev = socdev;
      INIT_DELAYED_WORK(&codec->delayed_work, wm8753_work);

#if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
      if (setup->i2c_address) {
            normal_i2c[0] = setup->i2c_address;
            codec->hw_write = (hw_write_t)i2c_master_send;
            ret = i2c_add_driver(&wm8753_i2c_driver);
            if (ret != 0)
                  printk(KERN_ERR "can't add i2c driver");
      }
#else
            /* Add other interfaces here */
#endif
      return ret;
}

/*
 * This function forces any delayed work to be queued and run.
 */
static int run_delayed_work(struct delayed_work *dwork)
{
      int ret;

      /* cancel any work waiting to be queued. */
      ret = cancel_delayed_work(dwork);

      /* if there was any work waiting then we run it now and
       * wait for it's completion */
      if (ret) {
            schedule_delayed_work(dwork, 0);
            flush_scheduled_work();
      }
      return ret;
}

/* power down chip */
static int wm8753_remove(struct platform_device *pdev)
{
      struct snd_soc_device *socdev = platform_get_drvdata(pdev);
      struct snd_soc_codec *codec = socdev->codec;

      if (codec->control_data)
            wm8753_dapm_event(codec, SNDRV_CTL_POWER_D3cold);
      run_delayed_work(&codec->delayed_work);
      snd_soc_free_pcms(socdev);
      snd_soc_dapm_free(socdev);
#if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
      i2c_del_driver(&wm8753_i2c_driver);
#endif
      kfree(codec->private_data);
      kfree(codec);

      return 0;
}

struct snd_soc_codec_device soc_codec_dev_wm8753 = {
      .probe =    wm8753_probe,
      .remove =   wm8753_remove,
      .suspend =  wm8753_suspend,
      .resume =   wm8753_resume,
};

EXPORT_SYMBOL_GPL(soc_codec_dev_wm8753);

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

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