text: /*
   * wm8753.c  --  WM8753 ALSA Soc Audio driver
   *
   * Copyright 2003 Wolfson Microelectronics PLC.
   * Author: Liam Girdwood <lrg@slimlogic.co.uk>
   *
   *  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/platform_device.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 u16 wm8753_reg[] = {
  	0x0000, 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, 0x0000
  };
  
  /* codec private data */
  struct wm8753_priv {
  	enum snd_soc_control_type control_type;
  	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 audio_map[] = {
  	/* 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"},
  };
  
  static int wm8753_add_widgets(struct snd_soc_codec *codec)
  {
  	struct snd_soc_dapm_context *dapm = &codec->dapm;
  
  	snd_soc_dapm_new_controls(dapm, wm8753_dapm_widgets,
  				  ARRAY_SIZE(wm8753_dapm_widgets));
  	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
  
  	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: 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_pcm_runtime *rtd = substream->private_data;
  	struct snd_soc_codec *codec = rtd->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_pcm_runtime *rtd = substream->private_data;
  	struct snd_soc_codec *codec = rtd->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 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 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, pm_message_t state)
  {
  	wm8753_set_bias_level(codec, SND_SOC_BIAS_OFF);
  	return 0;
  }
  
  static int wm8753_resume(struct snd_soc_codec *codec)
  {
  	u16 *reg_cache = codec->reg_cache;
  	int i;
  
  	/* Sync reg_cache with the hardware */
  	for (i = 1; i < ARRAY_SIZE(wm8753_reg); i++) {
  		if (i == WM8753_RESET)
  			continue;
  
  		/* No point in writing hardware default values back */
  		if (reg_cache[i] == wm8753_reg[i])
  			continue;
  
  		snd_soc_write(codec, i, reg_cache[i]);
  	}
  
  	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);
  
  	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8753->control_type);
  	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);
  
  	snd_soc_add_controls(codec, wm8753_snd_controls,
  			     ARRAY_SIZE(wm8753_snd_controls));
  	wm8753_add_widgets(codec);
  
  	return 0;
  }
  
  /* power down chip */
  static int wm8753_remove(struct snd_soc_codec *codec)
  {
  	flush_delayed_work_sync(&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,
  	.reg_cache_size = ARRAY_SIZE(wm8753_reg),
  	.reg_word_size = sizeof(u16),
  	.reg_cache_default = wm8753_reg,
  };
  
  #if defined(CONFIG_SPI_MASTER)
  static int __devinit wm8753_spi_probe(struct spi_device *spi)
  {
  	struct wm8753_priv *wm8753;
  	int ret;
  
  	wm8753 = kzalloc(sizeof(struct wm8753_priv), GFP_KERNEL);
  	if (wm8753 == NULL)
  		return -ENOMEM;
  
  	wm8753->control_type = SND_SOC_SPI;
  	spi_set_drvdata(spi, wm8753);
  
  	ret = snd_soc_register_codec(&spi->dev,
  			&soc_codec_dev_wm8753, wm8753_dai, ARRAY_SIZE(wm8753_dai));
  	if (ret < 0)
  		kfree(wm8753);
  	return ret;
  }
  
  static int __devexit wm8753_spi_remove(struct spi_device *spi)
  {
  	snd_soc_unregister_codec(&spi->dev);
  	kfree(spi_get_drvdata(spi));
  	return 0;
  }
  
  static struct spi_driver wm8753_spi_driver = {
  	.driver = {
  		.name	= "wm8753-codec",
  		.owner	= THIS_MODULE,
  	},
  	.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 = kzalloc(sizeof(struct wm8753_priv), GFP_KERNEL);
  	if (wm8753 == NULL)
  		return -ENOMEM;
  
  	i2c_set_clientdata(i2c, wm8753);
  	wm8753->control_type = SND_SOC_I2C;
  
  	ret =  snd_soc_register_codec(&i2c->dev,
  			&soc_codec_dev_wm8753, wm8753_dai, ARRAY_SIZE(wm8753_dai));
  	if (ret < 0)
  		kfree(wm8753);
  	return ret;
  }
  
  static __devexit int wm8753_i2c_remove(struct i2c_client *client)
  {
  	snd_soc_unregister_codec(&client->dev);
  	kfree(i2c_get_clientdata(client));
  	return 0;
  }
  
  static const struct i2c_device_id wm8753_i2c_id[] = {
  	{ "wm8753", 0 },
  	{ }
  };
  MODULE_DEVICE_TABLE(i2c, wm8753_i2c_id);
  
  static struct i2c_driver wm8753_i2c_driver = {
  	.driver = {
  		.name = "wm8753-codec",
  		.owner = THIS_MODULE,
  	},
  	.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");
  