/*
 * wm8993.c -- WM8993 ALSA SoC audio driver
 *
 * Copyright 2009, 2010 Wolfson Microelectronics plc
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/regulator/consumer.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/tlv.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <sound/wm8993.h>

#include "wm8993.h"
#include "wm_hubs.h"

#define WM8993_NUM_SUPPLIES 6
static const char *wm8993_supply_names[WM8993_NUM_SUPPLIES] = {
	"DCVDD",
	"DBVDD",
	"AVDD1",
	"AVDD2",
	"CPVDD",
	"SPKVDD",
};

static u16 wm8993_reg_defaults[WM8993_REGISTER_COUNT] = {
	0x8993,     /* R0   - Software Reset */
	0x0000,     /* R1   - Power Management (1) */
	0x6000,     /* R2   - Power Management (2) */
	0x0000,     /* R3   - Power Management (3) */
	0x4050,     /* R4   - Audio Interface (1) */
	0x4000,     /* R5   - Audio Interface (2) */
	0x01C8,     /* R6   - Clocking 1 */
	0x0000,     /* R7   - Clocking 2 */
	0x0000,     /* R8   - Audio Interface (3) */
	0x0040,     /* R9   - Audio Interface (4) */
	0x0004,     /* R10  - DAC CTRL */
	0x00C0,     /* R11  - Left DAC Digital Volume */
	0x00C0,     /* R12  - Right DAC Digital Volume */
	0x0000,     /* R13  - Digital Side Tone */
	0x0300,     /* R14  - ADC CTRL */
	0x00C0,     /* R15  - Left ADC Digital Volume */
	0x00C0,     /* R16  - Right ADC Digital Volume */
	0x0000,     /* R17 */
	0x0000,     /* R18  - GPIO CTRL 1 */
	0x0010,     /* R19  - GPIO1 */
	0x0000,     /* R20  - IRQ_DEBOUNCE */
	0x0000,     /* R21 */
	0x8000,     /* R22  - GPIOCTRL 2 */
	0x0800,     /* R23  - GPIO_POL */
	0x008B,     /* R24  - Left Line Input 1&2 Volume */
	0x008B,     /* R25  - Left Line Input 3&4 Volume */
	0x008B,     /* R26  - Right Line Input 1&2 Volume */
	0x008B,     /* R27  - Right Line Input 3&4 Volume */
	0x006D,     /* R28  - Left Output Volume */
	0x006D,     /* R29  - Right Output Volume */
	0x0066,     /* R30  - Line Outputs Volume */
	0x0020,     /* R31  - HPOUT2 Volume */
	0x0079,     /* R32  - Left OPGA Volume */
	0x0079,     /* R33  - Right OPGA Volume */
	0x0003,     /* R34  - SPKMIXL Attenuation */
	0x0003,     /* R35  - SPKMIXR Attenuation */
	0x0011,     /* R36  - SPKOUT Mixers */
	0x0100,     /* R37  - SPKOUT Boost */
	0x0079,     /* R38  - Speaker Volume Left */
	0x0079,     /* R39  - Speaker Volume Right */
	0x0000,     /* R40  - Input Mixer2 */
	0x0000,     /* R41  - Input Mixer3 */
	0x0000,     /* R42  - Input Mixer4 */
	0x0000,     /* R43  - Input Mixer5 */
	0x0000,     /* R44  - Input Mixer6 */
	0x0000,     /* R45  - Output Mixer1 */
	0x0000,     /* R46  - Output Mixer2 */
	0x0000,     /* R47  - Output Mixer3 */
	0x0000,     /* R48  - Output Mixer4 */
	0x0000,     /* R49  - Output Mixer5 */
	0x0000,     /* R50  - Output Mixer6 */
	0x0000,     /* R51  - HPOUT2 Mixer */
	0x0000,     /* R52  - Line Mixer1 */
	0x0000,     /* R53  - Line Mixer2 */
	0x0000,     /* R54  - Speaker Mixer */
	0x0000,     /* R55  - Additional Control */
	0x0000,     /* R56  - AntiPOP1 */
	0x0000,     /* R57  - AntiPOP2 */
	0x0000,     /* R58  - MICBIAS */
	0x0000,     /* R59 */
	0x0000,     /* R60  - FLL Control 1 */
	0x0000,     /* R61  - FLL Control 2 */
	0x0000,     /* R62  - FLL Control 3 */
	0x2EE0,     /* R63  - FLL Control 4 */
	0x0002,     /* R64  - FLL Control 5 */
	0x2287,     /* R65  - Clocking 3 */
	0x025F,     /* R66  - Clocking 4 */
	0x0000,     /* R67  - MW Slave Control */
	0x0000,     /* R68 */
	0x0002,     /* R69  - Bus Control 1 */
	0x0000,     /* R70  - Write Sequencer 0 */
	0x0000,     /* R71  - Write Sequencer 1 */
	0x0000,     /* R72  - Write Sequencer 2 */
	0x0000,     /* R73  - Write Sequencer 3 */
	0x0000,     /* R74  - Write Sequencer 4 */
	0x0000,     /* R75  - Write Sequencer 5 */
	0x1F25,     /* R76  - Charge Pump 1 */
	0x0000,     /* R77 */
	0x0000,     /* R78 */
	0x0000,     /* R79 */
	0x0000,     /* R80 */
	0x0000,     /* R81  - Class W 0 */
	0x0000,     /* R82 */
	0x0000,     /* R83 */
	0x0000,     /* R84  - DC Servo 0 */
	0x054A,     /* R85  - DC Servo 1 */
	0x0000,     /* R86 */
	0x0000,     /* R87  - DC Servo 3 */
	0x0000,     /* R88  - DC Servo Readback 0 */
	0x0000,     /* R89  - DC Servo Readback 1 */
	0x0000,     /* R90  - DC Servo Readback 2 */
	0x0000,     /* R91 */
	0x0000,     /* R92 */
	0x0000,     /* R93 */
	0x0000,     /* R94 */
	0x0000,     /* R95 */
	0x0100,     /* R96  - Analogue HP 0 */
	0x0000,     /* R97 */
	0x0000,     /* R98  - EQ1 */
	0x000C,     /* R99  - EQ2 */
	0x000C,     /* R100 - EQ3 */
	0x000C,     /* R101 - EQ4 */
	0x000C,     /* R102 - EQ5 */
	0x000C,     /* R103 - EQ6 */
	0x0FCA,     /* R104 - EQ7 */
	0x0400,     /* R105 - EQ8 */
	0x00D8,     /* R106 - EQ9 */
	0x1EB5,     /* R107 - EQ10 */
	0xF145,     /* R108 - EQ11 */
	0x0B75,     /* R109 - EQ12 */
	0x01C5,     /* R110 - EQ13 */
	0x1C58,     /* R111 - EQ14 */
	0xF373,     /* R112 - EQ15 */
	0x0A54,     /* R113 - EQ16 */
	0x0558,     /* R114 - EQ17 */
	0x168E,     /* R115 - EQ18 */
	0xF829,     /* R116 - EQ19 */
	0x07AD,     /* R117 - EQ20 */
	0x1103,     /* R118 - EQ21 */
	0x0564,     /* R119 - EQ22 */
	0x0559,     /* R120 - EQ23 */
	0x4000,     /* R121 - EQ24 */
	0x0000,     /* R122 - Digital Pulls */
	0x0F08,     /* R123 - DRC Control 1 */
	0x0000,     /* R124 - DRC Control 2 */
	0x0080,     /* R125 - DRC Control 3 */
	0x0000,     /* R126 - DRC Control 4 */
};

static struct {
	int ratio;
	int clk_sys_rate;
} clk_sys_rates[] = {
	{ 64,   0 },
	{ 128,  1 },
	{ 192,  2 },
	{ 256,  3 },
	{ 384,  4 },
	{ 512,  5 },
	{ 768,  6 },
	{ 1024, 7 },
	{ 1408, 8 },
	{ 1536, 9 },
};

static struct {
	int rate;
	int sample_rate;
} sample_rates[] = {
	{ 8000,  0  },
	{ 11025, 1  },
	{ 12000, 1  },
	{ 16000, 2  },
	{ 22050, 3  },
	{ 24000, 3  },
	{ 32000, 4  },
	{ 44100, 5  },
	{ 48000, 5  },
};

static struct {
	int div; /* *10 due to .5s */
	int bclk_div;
} bclk_divs[] = {
	{ 10,  0  },
	{ 15,  1  },
	{ 20,  2  },
	{ 30,  3  },
	{ 40,  4  },
	{ 55,  5  },
	{ 60,  6  },
	{ 80,  7  },
	{ 110, 8  },
	{ 120, 9  },
	{ 160, 10 },
	{ 220, 11 },
	{ 240, 12 },
	{ 320, 13 },
	{ 440, 14 },
	{ 480, 15 },
};

struct wm8993_priv {
	struct wm_hubs_data hubs_data;
	u16 reg_cache[WM8993_REGISTER_COUNT];
	struct regulator_bulk_data supplies[WM8993_NUM_SUPPLIES];
	struct wm8993_platform_data pdata;
	struct snd_soc_codec codec;
	int master;
	int sysclk_source;
	int tdm_slots;
	int tdm_width;
	unsigned int mclk_rate;
	unsigned int sysclk_rate;
	unsigned int fs;
	unsigned int bclk;
	int class_w_users;
	unsigned int fll_fref;
	unsigned int fll_fout;
	int fll_src;
};

static int wm8993_volatile(unsigned int reg)
{
	switch (reg) {
	case WM8993_SOFTWARE_RESET:
	case WM8993_DC_SERVO_0:
	case WM8993_DC_SERVO_READBACK_0:
	case WM8993_DC_SERVO_READBACK_1:
	case WM8993_DC_SERVO_READBACK_2:
		return 1;
	default:
		return 0;
	}
}

struct _fll_div {
	u16 fll_fratio;
	u16 fll_outdiv;
	u16 fll_clk_ref_div;
	u16 n;
	u16 k;
};

/* The size in bits of the FLL divide multiplied by 10
 * to allow rounding later */
#define FIXED_FLL_SIZE ((1 << 16) * 10)

static struct {
	unsigned int min;
	unsigned int max;
	u16 fll_fratio;
	int ratio;
} fll_fratios[] = {
	{       0,    64000, 4, 16 },
	{   64000,   128000, 3,  8 },
	{  128000,   256000, 2,  4 },
	{  256000,  1000000, 1,  2 },
	{ 1000000, 13500000, 0,  1 },
};

static int fll_factors(struct _fll_div *fll_div, unsigned int Fref,
		       unsigned int Fout)
{
	u64 Kpart;
	unsigned int K, Ndiv, Nmod, target;
	unsigned int div;
	int i;

	/* Fref must be <=13.5MHz */
	div = 1;
	fll_div->fll_clk_ref_div = 0;
	while ((Fref / div) > 13500000) {
		div *= 2;
		fll_div->fll_clk_ref_div++;

		if (div > 8) {
			pr_err("Can't scale %dMHz input down to <=13.5MHz\n",
			       Fref);
			return -EINVAL;
		}
	}

	pr_debug("Fref=%u Fout=%u\n", Fref, Fout);

	/* Apply the division for our remaining calculations */
	Fref /= div;

	/* Fvco should be 90-100MHz; don't check the upper bound */
	div = 0;
	target = Fout * 2;
	while (target < 90000000) {
		div++;
		target *= 2;
		if (div > 7) {
			pr_err("Unable to find FLL_OUTDIV for Fout=%uHz\n",
			       Fout);
			return -EINVAL;
		}
	}
	fll_div->fll_outdiv = div;

	pr_debug("Fvco=%dHz\n", target);

	/* Find an appropraite FLL_FRATIO and factor it out of the target */
	for (i = 0; i < ARRAY_SIZE(fll_fratios); i++) {
		if (fll_fratios[i].min <= Fref && Fref <= fll_fratios[i].max) {
			fll_div->fll_fratio = fll_fratios[i].fll_fratio;
			target /= fll_fratios[i].ratio;
			break;
		}
	}
	if (i == ARRAY_SIZE(fll_fratios)) {
		pr_err("Unable to find FLL_FRATIO for Fref=%uHz\n", Fref);
		return -EINVAL;
	}

	/* Now, calculate N.K */
	Ndiv = target / Fref;

	fll_div->n = Ndiv;
	Nmod = target % Fref;
	pr_debug("Nmod=%d\n", Nmod);

	/* Calculate fractional part - scale up so we can round. */
	Kpart = FIXED_FLL_SIZE * (long long)Nmod;

	do_div(Kpart, Fref);

	K = Kpart & 0xFFFFFFFF;

	if ((K % 10) >= 5)
		K += 5;

	/* Move down to proper range now rounding is done */
	fll_div->k = K / 10;

	pr_debug("N=%x K=%x FLL_FRATIO=%x FLL_OUTDIV=%x FLL_CLK_REF_DIV=%x\n",
		 fll_div->n, fll_div->k,
		 fll_div->fll_fratio, fll_div->fll_outdiv,
		 fll_div->fll_clk_ref_div);

	return 0;
}

static int wm8993_set_fll(struct snd_soc_dai *dai, int fll_id, int source,
			  unsigned int Fref, unsigned int Fout)
{
	struct snd_soc_codec *codec = dai->codec;
	struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
	u16 reg1, reg4, reg5;
	struct _fll_div fll_div;
	int ret;

	/* Any change? */
	if (Fref == wm8993->fll_fref && Fout == wm8993->fll_fout)
		return 0;

	/* Disable the FLL */
	if (Fout == 0) {
		dev_dbg(codec->dev, "FLL disabled\n");
		wm8993->fll_fref = 0;
		wm8993->fll_fout = 0;

		reg1 = snd_soc_read(codec, WM8993_FLL_CONTROL_1);
		reg1 &= ~WM8993_FLL_ENA;
		snd_soc_write(codec, WM8993_FLL_CONTROL_1, reg1);

		return 0;
	}

	ret = fll_factors(&fll_div, Fref, Fout);
	if (ret != 0)
		return ret;

	reg5 = snd_soc_read(codec, WM8993_FLL_CONTROL_5);
	reg5 &= ~WM8993_FLL_CLK_SRC_MASK;

	switch (fll_id) {
	case WM8993_FLL_MCLK:
		break;

	case WM8993_FLL_LRCLK:
		reg5 |= 1;
		break;

	case WM8993_FLL_BCLK:
		reg5 |= 2;
		break;

	default:
		dev_err(codec->dev, "Unknown FLL ID %d\n", fll_id);
		return -EINVAL;
	}

	/* Any FLL configuration change requires that the FLL be
	 * disabled first. */
	reg1 = snd_soc_read(codec, WM8993_FLL_CONTROL_1);
	reg1 &= ~WM8993_FLL_ENA;
	snd_soc_write(codec, WM8993_FLL_CONTROL_1, reg1);

	/* Apply the configuration */
	if (fll_div.k)
		reg1 |= WM8993_FLL_FRAC_MASK;
	else
		reg1 &= ~WM8993_FLL_FRAC_MASK;
	snd_soc_write(codec, WM8993_FLL_CONTROL_1, reg1);

	snd_soc_write(codec, WM8993_FLL_CONTROL_2,
		      (fll_div.fll_outdiv << WM8993_FLL_OUTDIV_SHIFT) |
		      (fll_div.fll_fratio << WM8993_FLL_FRATIO_SHIFT));
	snd_soc_write(codec, WM8993_FLL_CONTROL_3, fll_div.k);

	reg4 = snd_soc_read(codec, WM8993_FLL_CONTROL_4);
	reg4 &= ~WM8993_FLL_N_MASK;
	reg4 |= fll_div.n << WM8993_FLL_N_SHIFT;
	snd_soc_write(codec, WM8993_FLL_CONTROL_4, reg4);

	reg5 &= ~WM8993_FLL_CLK_REF_DIV_MASK;
	reg5 |= fll_div.fll_clk_ref_div << WM8993_FLL_CLK_REF_DIV_SHIFT;
	snd_soc_write(codec, WM8993_FLL_CONTROL_5, reg5);

	/* Enable the FLL */
	snd_soc_write(codec, WM8993_FLL_CONTROL_1, reg1 | WM8993_FLL_ENA);

	dev_dbg(codec->dev, "FLL enabled at %dHz->%dHz\n", Fref, Fout);

	wm8993->fll_fref = Fref;
	wm8993->fll_fout = Fout;
	wm8993->fll_src = source;

	return 0;
}

static int configure_clock(struct snd_soc_codec *codec)
{
	struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
	unsigned int reg;

	/* This should be done on init() for bypass paths */
	switch (wm8993->sysclk_source) {
	case WM8993_SYSCLK_MCLK:
		dev_dbg(codec->dev, "Using %dHz MCLK\n", wm8993->mclk_rate);

		reg = snd_soc_read(codec, WM8993_CLOCKING_2);
		reg &= ~(WM8993_MCLK_DIV | WM8993_SYSCLK_SRC);
		if (wm8993->mclk_rate > 13500000) {
			reg |= WM8993_MCLK_DIV;
			wm8993->sysclk_rate = wm8993->mclk_rate / 2;
		} else {
			reg &= ~WM8993_MCLK_DIV;
			wm8993->sysclk_rate = wm8993->mclk_rate;
		}
		snd_soc_write(codec, WM8993_CLOCKING_2, reg);
		break;

	case WM8993_SYSCLK_FLL:
		dev_dbg(codec->dev, "Using %dHz FLL clock\n",
			wm8993->fll_fout);

		reg = snd_soc_read(codec, WM8993_CLOCKING_2);
		reg |= WM8993_SYSCLK_SRC;
		if (wm8993->fll_fout > 13500000) {
			reg |= WM8993_MCLK_DIV;
			wm8993->sysclk_rate = wm8993->fll_fout / 2;
		} else {
			reg &= ~WM8993_MCLK_DIV;
			wm8993->sysclk_rate = wm8993->fll_fout;
		}
		snd_soc_write(codec, WM8993_CLOCKING_2, reg);
		break;

	default:
		dev_err(codec->dev, "System clock not configured\n");
		return -EINVAL;
	}

	dev_dbg(codec->dev, "CLK_SYS is %dHz\n", wm8993->sysclk_rate);

	return 0;
}

static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -3600, 300, 0);
static const DECLARE_TLV_DB_SCALE(drc_comp_threash, -4500, 75, 0);
static const DECLARE_TLV_DB_SCALE(drc_comp_amp, -2250, 75, 0);
static const DECLARE_TLV_DB_SCALE(drc_min_tlv, -1800, 600, 0);
static const unsigned int drc_max_tlv[] = {
	TLV_DB_RANGE_HEAD(4),
	0, 2, TLV_DB_SCALE_ITEM(1200, 600, 0),
	3, 3, TLV_DB_SCALE_ITEM(3600, 0, 0),
};
static const DECLARE_TLV_DB_SCALE(drc_qr_tlv, 1200, 600, 0);
static const DECLARE_TLV_DB_SCALE(drc_startup_tlv, -1800, 300, 0);
static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
static const DECLARE_TLV_DB_SCALE(digital_tlv, -7200, 75, 1);
static const DECLARE_TLV_DB_SCALE(dac_boost_tlv, 0, 600, 0);

static const char *dac_deemph_text[] = {
	"None",
	"32kHz",
	"44.1kHz",
	"48kHz",
};

static const struct soc_enum dac_deemph =
	SOC_ENUM_SINGLE(WM8993_DAC_CTRL, 4, 4, dac_deemph_text);

static const char *adc_hpf_text[] = {
	"Hi-Fi",
	"Voice 1",
	"Voice 2",
	"Voice 3",
};

static const struct soc_enum adc_hpf =
	SOC_ENUM_SINGLE(WM8993_ADC_CTRL, 5, 4, adc_hpf_text);

static const char *drc_path_text[] = {
	"ADC",
	"DAC"
};

static const struct soc_enum drc_path =
	SOC_ENUM_SINGLE(WM8993_DRC_CONTROL_1, 14, 2, drc_path_text);

static const char *drc_r0_text[] = {
	"1",
	"1/2",
	"1/4",
	"1/8",
	"1/16",
	"0",
};

static const struct soc_enum drc_r0 =
	SOC_ENUM_SINGLE(WM8993_DRC_CONTROL_3, 8, 6, drc_r0_text);

static const char *drc_r1_text[] = {
	"1",
	"1/2",
	"1/4",
	"1/8",
	"0",
};

static const struct soc_enum drc_r1 =
	SOC_ENUM_SINGLE(WM8993_DRC_CONTROL_4, 13, 5, drc_r1_text);

static const char *drc_attack_text[] = {
	"Reserved",
	"181us",
	"363us",
	"726us",
	"1.45ms",
	"2.9ms",
	"5.8ms",
	"11.6ms",
	"23.2ms",
	"46.4ms",
	"92.8ms",
	"185.6ms",
};

static const struct soc_enum drc_attack =
	SOC_ENUM_SINGLE(WM8993_DRC_CONTROL_2, 12, 12, drc_attack_text);

static const char *drc_decay_text[] = {
	"186ms",
	"372ms",
	"743ms",
	"1.49s",
	"2.97ms",
	"5.94ms",
	"11.89ms",
	"23.78ms",
	"47.56ms",
};

static const struct soc_enum drc_decay =
	SOC_ENUM_SINGLE(WM8993_DRC_CONTROL_2, 8, 9, drc_decay_text);

static const char *drc_ff_text[] = {
	"5 samples",
	"9 samples",
};

static const struct soc_enum drc_ff =
	SOC_ENUM_SINGLE(WM8993_DRC_CONTROL_3, 7, 2, drc_ff_text);

static const char *drc_qr_rate_text[] = {
	"0.725ms",
	"1.45ms",
	"5.8ms",
};

static const struct soc_enum drc_qr_rate =
	SOC_ENUM_SINGLE(WM8993_DRC_CONTROL_3, 0, 3, drc_qr_rate_text);

static const char *drc_smooth_text[] = {
	"Low",
	"Medium",
	"High",
};

static const struct soc_enum drc_smooth =
	SOC_ENUM_SINGLE(WM8993_DRC_CONTROL_1, 4, 3, drc_smooth_text);

static const struct snd_kcontrol_new wm8993_snd_controls[] = {
SOC_DOUBLE_TLV("Digital Sidetone Volume", WM8993_DIGITAL_SIDE_TONE,
	       5, 9, 12, 0, sidetone_tlv),

SOC_SINGLE("DRC Switch", WM8993_DRC_CONTROL_1, 15, 1, 0),
SOC_ENUM("DRC Path", drc_path),
SOC_SINGLE_TLV("DRC Compressor Threshold Volume", WM8993_DRC_CONTROL_2,
	       2, 60, 1, drc_comp_threash),
SOC_SINGLE_TLV("DRC Compressor Amplitude Volume", WM8993_DRC_CONTROL_3,
	       11, 30, 1, drc_comp_amp),
SOC_ENUM("DRC R0", drc_r0),
SOC_ENUM("DRC R1", drc_r1),
SOC_SINGLE_TLV("DRC Minimum Volume", WM8993_DRC_CONTROL_1, 2, 3, 1,
	       drc_min_tlv),
SOC_SINGLE_TLV("DRC Maximum Volume", WM8993_DRC_CONTROL_1, 0, 3, 0,
	       drc_max_tlv),
SOC_ENUM("DRC Attack Rate", drc_attack),
SOC_ENUM("DRC Decay Rate", drc_decay),
SOC_ENUM("DRC FF Delay", drc_ff),
SOC_SINGLE("DRC Anti-clip Switch", WM8993_DRC_CONTROL_1, 9, 1, 0),
SOC_SINGLE("DRC Quick Release Switch", WM8993_DRC_CONTROL_1, 10, 1, 0),
SOC_SINGLE_TLV("DRC Quick Release Volume", WM8993_DRC_CONTROL_3, 2, 3, 0,
	       drc_qr_tlv),
SOC_ENUM("DRC Quick Release Rate", drc_qr_rate),
SOC_SINGLE("DRC Smoothing Switch", WM8993_DRC_CONTROL_1, 11, 1, 0),
SOC_SINGLE("DRC Smoothing Hysteresis Switch", WM8993_DRC_CONTROL_1, 8, 1, 0),
SOC_ENUM("DRC Smoothing Hysteresis Threshold", drc_smooth),
SOC_SINGLE_TLV("DRC Startup Volume", WM8993_DRC_CONTROL_4, 8, 18, 0,
	       drc_startup_tlv),

SOC_SINGLE("EQ Switch", WM8993_EQ1, 0, 1, 0),

SOC_DOUBLE_R_TLV("Capture Volume", WM8993_LEFT_ADC_DIGITAL_VOLUME,
		 WM8993_RIGHT_ADC_DIGITAL_VOLUME, 1, 96, 0, digital_tlv),
SOC_SINGLE("ADC High Pass Filter Switch", WM8993_ADC_CTRL, 8, 1, 0),
SOC_ENUM("ADC High Pass Filter Mode", adc_hpf),

SOC_DOUBLE_R_TLV("Playback Volume", WM8993_LEFT_DAC_DIGITAL_VOLUME,
		 WM8993_RIGHT_DAC_DIGITAL_VOLUME, 1, 96, 0, digital_tlv),
SOC_SINGLE_TLV("Playback Boost Volume", WM8993_AUDIO_INTERFACE_2, 10, 3, 0,
	       dac_boost_tlv),
SOC_ENUM("DAC Deemphasis", dac_deemph),

SOC_SINGLE_TLV("SPKL DAC Volume", WM8993_SPKMIXL_ATTENUATION,
	       2, 1, 1, wm_hubs_spkmix_tlv),

SOC_SINGLE_TLV("SPKR DAC Volume", WM8993_SPKMIXR_ATTENUATION,
	       2, 1, 1, wm_hubs_spkmix_tlv),
};

static const struct snd_kcontrol_new wm8993_eq_controls[] = {
SOC_SINGLE_TLV("EQ1 Volume", WM8993_EQ2, 0, 24, 0, eq_tlv),
SOC_SINGLE_TLV("EQ2 Volume", WM8993_EQ3, 0, 24, 0, eq_tlv),
SOC_SINGLE_TLV("EQ3 Volume", WM8993_EQ4, 0, 24, 0, eq_tlv),
SOC_SINGLE_TLV("EQ4 Volume", WM8993_EQ5, 0, 24, 0, eq_tlv),
SOC_SINGLE_TLV("EQ5 Volume", WM8993_EQ6, 0, 24, 0, eq_tlv),
};

static int clk_sys_event(struct snd_soc_dapm_widget *w,
			 struct snd_kcontrol *kcontrol, int event)
{
	struct snd_soc_codec *codec = w->codec;

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		return configure_clock(codec);

	case SND_SOC_DAPM_POST_PMD:
		break;
	}

	return 0;
}

/*
 * When used with DAC outputs only the WM8993 charge pump supports
 * operation in class W mode, providing very low power consumption
 * when used with digital sources.  Enable and disable this mode
 * automatically depending on the mixer configuration.
 *
 * Currently the only supported paths are the direct DAC->headphone
 * paths (which provide minimum power consumption anyway).
 */
static int class_w_put(struct snd_kcontrol *kcontrol,
		       struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_dapm_widget *widget = snd_kcontrol_chip(kcontrol);
	struct snd_soc_codec *codec = widget->codec;
	struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
	int ret;

	/* Turn it off if we're using the main output mixer */
	if (ucontrol->value.integer.value[0] == 0) {
		if (wm8993->class_w_users == 0) {
			dev_dbg(codec->dev, "Disabling Class W\n");
			snd_soc_update_bits(codec, WM8993_CLASS_W_0,
					    WM8993_CP_DYN_FREQ |
					    WM8993_CP_DYN_V,
					    0);
		}
		wm8993->class_w_users++;
	}

	/* Implement the change */
	ret = snd_soc_dapm_put_enum_double(kcontrol, ucontrol);

	/* Enable it if we're using the direct DAC path */
	if (ucontrol->value.integer.value[0] == 1) {
		if (wm8993->class_w_users == 1) {
			dev_dbg(codec->dev, "Enabling Class W\n");
			snd_soc_update_bits(codec, WM8993_CLASS_W_0,
					    WM8993_CP_DYN_FREQ |
					    WM8993_CP_DYN_V,
					    WM8993_CP_DYN_FREQ |
					    WM8993_CP_DYN_V);
		}
		wm8993->class_w_users--;
	}

	dev_dbg(codec->dev, "Indirect DAC use count now %d\n",
		wm8993->class_w_users);

	return ret;
}

#define SOC_DAPM_ENUM_W(xname, xenum) \
{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
	.info = snd_soc_info_enum_double, \
	.get = snd_soc_dapm_get_enum_double, \
	.put = class_w_put, \
	.private_value = (unsigned long)&xenum }

static const char *hp_mux_text[] = {
	"Mixer",
	"DAC",
};

static const struct soc_enum hpl_enum =
	SOC_ENUM_SINGLE(WM8993_OUTPUT_MIXER1, 8, 2, hp_mux_text);

static const struct snd_kcontrol_new hpl_mux =
	SOC_DAPM_ENUM_W("Left Headphone Mux", hpl_enum);

static const struct soc_enum hpr_enum =
	SOC_ENUM_SINGLE(WM8993_OUTPUT_MIXER2, 8, 2, hp_mux_text);

static const struct snd_kcontrol_new hpr_mux =
	SOC_DAPM_ENUM_W("Right Headphone Mux", hpr_enum);

static const struct snd_kcontrol_new left_speaker_mixer[] = {
SOC_DAPM_SINGLE("Input Switch", WM8993_SPEAKER_MIXER, 7, 1, 0),
SOC_DAPM_SINGLE("IN1LP Switch", WM8993_SPEAKER_MIXER, 5, 1, 0),
SOC_DAPM_SINGLE("Output Switch", WM8993_SPEAKER_MIXER, 3, 1, 0),
SOC_DAPM_SINGLE("DAC Switch", WM8993_SPEAKER_MIXER, 6, 1, 0),
};

static const struct snd_kcontrol_new right_speaker_mixer[] = {
SOC_DAPM_SINGLE("Input Switch", WM8993_SPEAKER_MIXER, 6, 1, 0),
SOC_DAPM_SINGLE("IN1RP Switch", WM8993_SPEAKER_MIXER, 4, 1, 0),
SOC_DAPM_SINGLE("Output Switch", WM8993_SPEAKER_MIXER, 2, 1, 0),
SOC_DAPM_SINGLE("DAC Switch", WM8993_SPEAKER_MIXER, 0, 1, 0),
};

static const char *aif_text[] = {
	"Left", "Right"
};

static const struct soc_enum aifoutl_enum =
	SOC_ENUM_SINGLE(WM8993_AUDIO_INTERFACE_1, 15, 2, aif_text);

static const struct snd_kcontrol_new aifoutl_mux =
	SOC_DAPM_ENUM("AIFOUTL Mux", aifoutl_enum);

static const struct soc_enum aifoutr_enum =
	SOC_ENUM_SINGLE(WM8993_AUDIO_INTERFACE_1, 14, 2, aif_text);

static const struct snd_kcontrol_new aifoutr_mux =
	SOC_DAPM_ENUM("AIFOUTR Mux", aifoutr_enum);

static const struct soc_enum aifinl_enum =
	SOC_ENUM_SINGLE(WM8993_AUDIO_INTERFACE_2, 15, 2, aif_text);

static const struct snd_kcontrol_new aifinl_mux =
	SOC_DAPM_ENUM("AIFINL Mux", aifinl_enum);

static const struct soc_enum aifinr_enum =
	SOC_ENUM_SINGLE(WM8993_AUDIO_INTERFACE_2, 14, 2, aif_text);

static const struct snd_kcontrol_new aifinr_mux =
	SOC_DAPM_ENUM("AIFINR Mux", aifinr_enum);

static const char *sidetone_text[] = {
	"None", "Left", "Right"
};

static const struct soc_enum sidetonel_enum =
	SOC_ENUM_SINGLE(WM8993_DIGITAL_SIDE_TONE, 2, 3, sidetone_text);

static const struct snd_kcontrol_new sidetonel_mux =
	SOC_DAPM_ENUM("Left Sidetone", sidetonel_enum);

static const struct soc_enum sidetoner_enum =
	SOC_ENUM_SINGLE(WM8993_DIGITAL_SIDE_TONE, 0, 3, sidetone_text);

static const struct snd_kcontrol_new sidetoner_mux =
	SOC_DAPM_ENUM("Right Sidetone", sidetoner_enum);

static const struct snd_soc_dapm_widget wm8993_dapm_widgets[] = {
SND_SOC_DAPM_SUPPLY("CLK_SYS", WM8993_BUS_CONTROL_1, 1, 0, clk_sys_event,
		    SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_SUPPLY("TOCLK", WM8993_CLOCKING_1, 14, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("CLK_DSP", WM8993_CLOCKING_3, 0, 0, NULL, 0),

SND_SOC_DAPM_ADC("ADCL", NULL, WM8993_POWER_MANAGEMENT_2, 1, 0),
SND_SOC_DAPM_ADC("ADCR", NULL, WM8993_POWER_MANAGEMENT_2, 0, 0),

SND_SOC_DAPM_MUX("AIFOUTL Mux", SND_SOC_NOPM, 0, 0, &aifoutl_mux),
SND_SOC_DAPM_MUX("AIFOUTR Mux", SND_SOC_NOPM, 0, 0, &aifoutr_mux),

SND_SOC_DAPM_AIF_OUT("AIFOUTL", "Capture", 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_OUT("AIFOUTR", "Capture", 1, SND_SOC_NOPM, 0, 0),

SND_SOC_DAPM_AIF_IN("AIFINL", "Playback", 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("AIFINR", "Playback", 1, SND_SOC_NOPM, 0, 0),

SND_SOC_DAPM_MUX("DACL Mux", SND_SOC_NOPM, 0, 0, &aifinl_mux),
SND_SOC_DAPM_MUX("DACR Mux", SND_SOC_NOPM, 0, 0, &aifinr_mux),

SND_SOC_DAPM_MUX("DACL Sidetone", SND_SOC_NOPM, 0, 0, &sidetonel_mux),
SND_SOC_DAPM_MUX("DACR Sidetone", SND_SOC_NOPM, 0, 0, &sidetoner_mux),

SND_SOC_DAPM_DAC("DACL", NULL, WM8993_POWER_MANAGEMENT_3, 1, 0),
SND_SOC_DAPM_DAC("DACR", NULL, WM8993_POWER_MANAGEMENT_3, 0, 0),

SND_SOC_DAPM_MUX("Left Headphone Mux", SND_SOC_NOPM, 0, 0, &hpl_mux),
SND_SOC_DAPM_MUX("Right Headphone Mux", SND_SOC_NOPM, 0, 0, &hpr_mux),

SND_SOC_DAPM_MIXER("SPKL", WM8993_POWER_MANAGEMENT_3, 8, 0,
		   left_speaker_mixer, ARRAY_SIZE(left_speaker_mixer)),
SND_SOC_DAPM_MIXER("SPKR", WM8993_POWER_MANAGEMENT_3, 9, 0,
		   right_speaker_mixer, ARRAY_SIZE(right_speaker_mixer)),

};

static const struct snd_soc_dapm_route routes[] = {
	{ "ADCL", NULL, "CLK_SYS" },
	{ "ADCL", NULL, "CLK_DSP" },
	{ "ADCR", NULL, "CLK_SYS" },
	{ "ADCR", NULL, "CLK_DSP" },

	{ "AIFOUTL Mux", "Left", "ADCL" },
	{ "AIFOUTL Mux", "Right", "ADCR" },
	{ "AIFOUTR Mux", "Left", "ADCL" },
	{ "AIFOUTR Mux", "Right", "ADCR" },

	{ "AIFOUTL", NULL, "AIFOUTL Mux" },
	{ "AIFOUTR", NULL, "AIFOUTR Mux" },

	{ "DACL Mux", "Left", "AIFINL" },
	{ "DACL Mux", "Right", "AIFINR" },
	{ "DACR Mux", "Left", "AIFINL" },
	{ "DACR Mux", "Right", "AIFINR" },

	{ "DACL Sidetone", "Left", "ADCL" },
	{ "DACL Sidetone", "Right", "ADCR" },
	{ "DACR Sidetone", "Left", "ADCL" },
	{ "DACR Sidetone", "Right", "ADCR" },

	{ "DACL", NULL, "CLK_SYS" },
	{ "DACL", NULL, "CLK_DSP" },
	{ "DACL", NULL, "DACL Mux" },
	{ "DACL", NULL, "DACL Sidetone" },
	{ "DACR", NULL, "CLK_SYS" },
	{ "DACR", NULL, "CLK_DSP" },
	{ "DACR", NULL, "DACR Mux" },
	{ "DACR", NULL, "DACR Sidetone" },

	{ "Left Output Mixer", "DAC Switch", "DACL" },

	{ "Right Output Mixer", "DAC Switch", "DACR" },

	{ "Left Output PGA", NULL, "CLK_SYS" },

	{ "Right Output PGA", NULL, "CLK_SYS" },

	{ "SPKL", "DAC Switch", "DACL" },
	{ "SPKL", NULL, "CLK_SYS" },

	{ "SPKR", "DAC Switch", "DACR" },
	{ "SPKR", NULL, "CLK_SYS" },

	{ "Left Headphone Mux", "DAC", "DACL" },
	{ "Right Headphone Mux", "DAC", "DACR" },
};

static void wm8993_cache_restore(struct snd_soc_codec *codec)
{
	u16 *cache = codec->reg_cache;
	int i;

	if (!codec->cache_sync)
		return;

	/* Reenable hardware writes */
	codec->cache_only = 0;

	/* Restore the register settings */
	for (i = 1; i < WM8993_MAX_REGISTER; i++) {
		if (cache[i] == wm8993_reg_defaults[i])
			continue;
		snd_soc_write(codec, i, cache[i]);
	}

	/* We're in sync again */
	codec->cache_sync = 0;
}

static int wm8993_set_bias_level(struct snd_soc_codec *codec,
				 enum snd_soc_bias_level level)
{
	struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
	int ret;

	switch (level) {
	case SND_SOC_BIAS_ON:
	case SND_SOC_BIAS_PREPARE:
		/* VMID=2*40k */
		snd_soc_update_bits(codec, WM8993_POWER_MANAGEMENT_1,
				    WM8993_VMID_SEL_MASK, 0x2);
		snd_soc_update_bits(codec, WM8993_POWER_MANAGEMENT_2,
				    WM8993_TSHUT_ENA, WM8993_TSHUT_ENA);
		break;

	case SND_SOC_BIAS_STANDBY:
		if (codec->bias_level == SND_SOC_BIAS_OFF) {
			ret = regulator_bulk_enable(ARRAY_SIZE(wm8993->supplies),
						    wm8993->supplies);
			if (ret != 0)
				return ret;

			wm8993_cache_restore(codec);

			/* Tune DC servo configuration */
			snd_soc_write(codec, 0x44, 3);
			snd_soc_write(codec, 0x56, 3);
			snd_soc_write(codec, 0x44, 0);

			/* Bring up VMID with fast soft start */
			snd_soc_update_bits(codec, WM8993_ANTIPOP2,
					    WM8993_STARTUP_BIAS_ENA |
					    WM8993_VMID_BUF_ENA |
					    WM8993_VMID_RAMP_MASK |
					    WM8993_BIAS_SRC,
					    WM8993_STARTUP_BIAS_ENA |
					    WM8993_VMID_BUF_ENA |
					    WM8993_VMID_RAMP_MASK |
					    WM8993_BIAS_SRC);

			/* If either line output is single ended we
			 * need the VMID buffer */
			if (!wm8993->pdata.lineout1_diff ||
			    !wm8993->pdata.lineout2_diff)
				snd_soc_update_bits(codec, WM8993_ANTIPOP1,
						 WM8993_LINEOUT_VMID_BUF_ENA,
						 WM8993_LINEOUT_VMID_BUF_ENA);

			/* VMID=2*40k */
			snd_soc_update_bits(codec, WM8993_POWER_MANAGEMENT_1,
					    WM8993_VMID_SEL_MASK |
					    WM8993_BIAS_ENA,
					    WM8993_BIAS_ENA | 0x2);
			msleep(32);

			/* Switch to normal bias */
			snd_soc_update_bits(codec, WM8993_ANTIPOP2,
					    WM8993_BIAS_SRC |
					    WM8993_STARTUP_BIAS_ENA, 0);
		}

		/* VMID=2*240k */
		snd_soc_update_bits(codec, WM8993_POWER_MANAGEMENT_1,
				    WM8993_VMID_SEL_MASK, 0x4);

		snd_soc_update_bits(codec, WM8993_POWER_MANAGEMENT_2,
				    WM8993_TSHUT_ENA, 0);
		break;

	case SND_SOC_BIAS_OFF:
		snd_soc_update_bits(codec, WM8993_ANTIPOP1,
				    WM8993_LINEOUT_VMID_BUF_ENA, 0);

		snd_soc_update_bits(codec, WM8993_POWER_MANAGEMENT_1,
				    WM8993_VMID_SEL_MASK | WM8993_BIAS_ENA,
				    0);

#ifdef CONFIG_REGULATOR
               /* Post 2.6.34 we will be able to get a callback when
                * the regulators are disabled which we can use but
		* for now just assume that the power will be cut if
		* the regulator API is in use.
		*/
		codec->cache_sync = 1;
#endif

		regulator_bulk_disable(ARRAY_SIZE(wm8993->supplies),
				       wm8993->supplies);
		break;
	}

	codec->bias_level = level;

	return 0;
}

static int wm8993_set_sysclk(struct snd_soc_dai *codec_dai,
			     int clk_id, unsigned int freq, int dir)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);

	switch (clk_id) {
	case WM8993_SYSCLK_MCLK:
		wm8993->mclk_rate = freq;
	case WM8993_SYSCLK_FLL:
		wm8993->sysclk_source = clk_id;
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

static int wm8993_set_dai_fmt(struct snd_soc_dai *dai,
			      unsigned int fmt)
{
	struct snd_soc_codec *codec = dai->codec;
	struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
	unsigned int aif1 = snd_soc_read(codec, WM8993_AUDIO_INTERFACE_1);
	unsigned int aif4 = snd_soc_read(codec, WM8993_AUDIO_INTERFACE_4);

	aif1 &= ~(WM8993_BCLK_DIR | WM8993_AIF_BCLK_INV |
		  WM8993_AIF_LRCLK_INV | WM8993_AIF_FMT_MASK);
	aif4 &= ~WM8993_LRCLK_DIR;

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBS_CFS:
		wm8993->master = 0;
		break;
	case SND_SOC_DAIFMT_CBS_CFM:
		aif4 |= WM8993_LRCLK_DIR;
		wm8993->master = 1;
		break;
	case SND_SOC_DAIFMT_CBM_CFS:
		aif1 |= WM8993_BCLK_DIR;
		wm8993->master = 1;
		break;
	case SND_SOC_DAIFMT_CBM_CFM:
		aif1 |= WM8993_BCLK_DIR;
		aif4 |= WM8993_LRCLK_DIR;
		wm8993->master = 1;
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_DSP_B:
		aif1 |= WM8993_AIF_LRCLK_INV;
	case SND_SOC_DAIFMT_DSP_A:
		aif1 |= 0x18;
		break;
	case SND_SOC_DAIFMT_I2S:
		aif1 |= 0x10;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		aif1 |= 0x8;
		break;
	default:
		return -EINVAL;
	}

	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:
			aif1 |= WM8993_AIF_BCLK_INV;
			break;
		default:
			return -EINVAL;
		}
		break;

	case SND_SOC_DAIFMT_I2S:
	case SND_SOC_DAIFMT_RIGHT_J:
	case SND_SOC_DAIFMT_LEFT_J:
		switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
		case SND_SOC_DAIFMT_NB_NF:
			break;
		case SND_SOC_DAIFMT_IB_IF:
			aif1 |= WM8993_AIF_BCLK_INV | WM8993_AIF_LRCLK_INV;
			break;
		case SND_SOC_DAIFMT_IB_NF:
			aif1 |= WM8993_AIF_BCLK_INV;
			break;
		case SND_SOC_DAIFMT_NB_IF:
			aif1 |= WM8993_AIF_LRCLK_INV;
			break;
		default:
			return -EINVAL;
		}
		break;
	default:
		return -EINVAL;
	}

	snd_soc_write(codec, WM8993_AUDIO_INTERFACE_1, aif1);
	snd_soc_write(codec, WM8993_AUDIO_INTERFACE_4, aif4);

	return 0;
}

static int wm8993_hw_params(struct snd_pcm_substream *substream,
			    struct snd_pcm_hw_params *params,
			    struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
	int ret, i, best, best_val, cur_val;
	unsigned int clocking1, clocking3, aif1, aif4;

	clocking1 = snd_soc_read(codec, WM8993_CLOCKING_1);
	clocking1 &= ~WM8993_BCLK_DIV_MASK;

	clocking3 = snd_soc_read(codec, WM8993_CLOCKING_3);
	clocking3 &= ~(WM8993_CLK_SYS_RATE_MASK | WM8993_SAMPLE_RATE_MASK);

	aif1 = snd_soc_read(codec, WM8993_AUDIO_INTERFACE_1);
	aif1 &= ~WM8993_AIF_WL_MASK;

	aif4 = snd_soc_read(codec, WM8993_AUDIO_INTERFACE_4);
	aif4 &= ~WM8993_LRCLK_RATE_MASK;

	/* What BCLK do we need? */
	wm8993->fs = params_rate(params);
	wm8993->bclk = 2 * wm8993->fs;
	if (wm8993->tdm_slots) {
		dev_dbg(codec->dev, "Configuring for %d %d bit TDM slots\n",
			wm8993->tdm_slots, wm8993->tdm_width);
		wm8993->bclk *= wm8993->tdm_width * wm8993->tdm_slots;
	} else {
		switch (params_format(params)) {
		case SNDRV_PCM_FORMAT_S16_LE:
			wm8993->bclk *= 16;
			break;
		case SNDRV_PCM_FORMAT_S20_3LE:
			wm8993->bclk *= 20;
			aif1 |= 0x8;
			break;
		case SNDRV_PCM_FORMAT_S24_LE:
			wm8993->bclk *= 24;
			aif1 |= 0x10;
			break;
		case SNDRV_PCM_FORMAT_S32_LE:
			wm8993->bclk *= 32;
			aif1 |= 0x18;
			break;
		default:
			return -EINVAL;
		}
	}

	dev_dbg(codec->dev, "Target BCLK is %dHz\n", wm8993->bclk);

	ret = configure_clock(codec);
	if (ret != 0)
		return ret;

	/* Select nearest CLK_SYS_RATE */
	best = 0;
	best_val = abs((wm8993->sysclk_rate / clk_sys_rates[0].ratio)
		       - wm8993->fs);
	for (i = 1; i < ARRAY_SIZE(clk_sys_rates); i++) {
		cur_val = abs((wm8993->sysclk_rate /
			       clk_sys_rates[i].ratio) - wm8993->fs);;
		if (cur_val < best_val) {
			best = i;
			best_val = cur_val;
		}
	}
	dev_dbg(codec->dev, "Selected CLK_SYS_RATIO of %d\n",
		clk_sys_rates[best].ratio);
	clocking3 |= (clk_sys_rates[best].clk_sys_rate
		      << WM8993_CLK_SYS_RATE_SHIFT);

	/* SAMPLE_RATE */
	best = 0;
	best_val = abs(wm8993->fs - sample_rates[0].rate);
	for (i = 1; i < ARRAY_SIZE(sample_rates); i++) {
		/* Closest match */
		cur_val = abs(wm8993->fs - sample_rates[i].rate);
		if (cur_val < best_val) {
			best = i;
			best_val = cur_val;
		}
	}
	dev_dbg(codec->dev, "Selected SAMPLE_RATE of %dHz\n",
		sample_rates[best].rate);
	clocking3 |= (sample_rates[best].sample_rate
		      << WM8993_SAMPLE_RATE_SHIFT);

	/* BCLK_DIV */
	best = 0;
	best_val = INT_MAX;
	for (i = 0; i < ARRAY_SIZE(bclk_divs); i++) {
		cur_val = ((wm8993->sysclk_rate * 10) / bclk_divs[i].div)
			- wm8993->bclk;
		if (cur_val < 0) /* Table is sorted */
			break;
		if (cur_val < best_val) {
			best = i;
			best_val = cur_val;
		}
	}
	wm8993->bclk = (wm8993->sysclk_rate * 10) / bclk_divs[best].div;
	dev_dbg(codec->dev, "Selected BCLK_DIV of %d for %dHz BCLK\n",
		bclk_divs[best].div, wm8993->bclk);
	clocking1 |= bclk_divs[best].bclk_div << WM8993_BCLK_DIV_SHIFT;

	/* LRCLK is a simple fraction of BCLK */
	dev_dbg(codec->dev, "LRCLK_RATE is %d\n", wm8993->bclk / wm8993->fs);
	aif4 |= wm8993->bclk / wm8993->fs;

	snd_soc_write(codec, WM8993_CLOCKING_1, clocking1);
	snd_soc_write(codec, WM8993_CLOCKING_3, clocking3);
	snd_soc_write(codec, WM8993_AUDIO_INTERFACE_1, aif1);
	snd_soc_write(codec, WM8993_AUDIO_INTERFACE_4, aif4);

	/* ReTune Mobile? */
	if (wm8993->pdata.num_retune_configs) {
		u16 eq1 = snd_soc_read(codec, WM8993_EQ1);
		struct wm8993_retune_mobile_setting *s;

		best = 0;
		best_val = abs(wm8993->pdata.retune_configs[0].rate
			       - wm8993->fs);
		for (i = 0; i < wm8993->pdata.num_retune_configs; i++) {
			cur_val = abs(wm8993->pdata.retune_configs[i].rate
				      - wm8993->fs);
			if (cur_val < best_val) {
				best_val = cur_val;
				best = i;
			}
		}
		s = &wm8993->pdata.retune_configs[best];

		dev_dbg(codec->dev, "ReTune Mobile %s tuned for %dHz\n",
			s->name, s->rate);

		/* Disable EQ while we reconfigure */
		snd_soc_update_bits(codec, WM8993_EQ1, WM8993_EQ_ENA, 0);

		for (i = 1; i < ARRAY_SIZE(s->config); i++)
			snd_soc_write(codec, WM8993_EQ1 + i, s->config[i]);

		snd_soc_update_bits(codec, WM8993_EQ1, WM8993_EQ_ENA, eq1);
	}

	return 0;
}

static int wm8993_digital_mute(struct snd_soc_dai *codec_dai, int mute)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	unsigned int reg;

	reg = snd_soc_read(codec, WM8993_DAC_CTRL);

	if (mute)
		reg |= WM8993_DAC_MUTE;
	else
		reg &= ~WM8993_DAC_MUTE;

	snd_soc_write(codec, WM8993_DAC_CTRL, reg);

	return 0;
}

static int wm8993_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
			       unsigned int rx_mask, int slots, int slot_width)
{
	struct snd_soc_codec *codec = dai->codec;
	struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
	int aif1 = 0;
	int aif2 = 0;

	/* Don't need to validate anything if we're turning off TDM */
	if (slots == 0) {
		wm8993->tdm_slots = 0;
		goto out;
	}

	/* Note that we allow configurations we can't handle ourselves - 
	 * for example, we can generate clocks for slots 2 and up even if
	 * we can't use those slots ourselves.
	 */
	aif1 |= WM8993_AIFADC_TDM;
	aif2 |= WM8993_AIFDAC_TDM;

	switch (rx_mask) {
	case 3:
		break;
	case 0xc:
		aif1 |= WM8993_AIFADC_TDM_CHAN;
		break;
	default:
		return -EINVAL;
	}


	switch (tx_mask) {
	case 3:
		break;
	case 0xc:
		aif2 |= WM8993_AIFDAC_TDM_CHAN;
		break;
	default:
		return -EINVAL;
	}

out:
	wm8993->tdm_width = slot_width;
	wm8993->tdm_slots = slots / 2;

	snd_soc_update_bits(codec, WM8993_AUDIO_INTERFACE_1,
			    WM8993_AIFADC_TDM | WM8993_AIFADC_TDM_CHAN, aif1);
	snd_soc_update_bits(codec, WM8993_AUDIO_INTERFACE_2,
			    WM8993_AIFDAC_TDM | WM8993_AIFDAC_TDM_CHAN, aif2);

	return 0;
}

static struct snd_soc_dai_ops wm8993_ops = {
	.set_sysclk = wm8993_set_sysclk,
	.set_fmt = wm8993_set_dai_fmt,
	.hw_params = wm8993_hw_params,
	.digital_mute = wm8993_digital_mute,
	.set_pll = wm8993_set_fll,
	.set_tdm_slot = wm8993_set_tdm_slot,
};

#define WM8993_RATES SNDRV_PCM_RATE_8000_48000

#define WM8993_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
			SNDRV_PCM_FMTBIT_S20_3LE |\
			SNDRV_PCM_FMTBIT_S24_LE |\
			SNDRV_PCM_FMTBIT_S32_LE)

struct snd_soc_dai wm8993_dai = {
	.name = "WM8993",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 1,
		.channels_max = 2,
		.rates = WM8993_RATES,
		.formats = WM8993_FORMATS,
	},
	.capture = {
		 .stream_name = "Capture",
		 .channels_min = 1,
		 .channels_max = 2,
		 .rates = WM8993_RATES,
		 .formats = WM8993_FORMATS,
	 },
	.ops = &wm8993_ops,
	.symmetric_rates = 1,
};
EXPORT_SYMBOL_GPL(wm8993_dai);

static struct snd_soc_codec *wm8993_codec;

static int wm8993_probe(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec;
	struct wm8993_priv *wm8993;
	int ret = 0;

	if (!wm8993_codec) {
		dev_err(&pdev->dev, "I2C device not yet probed\n");
		goto err;
	}

	socdev->card->codec = wm8993_codec;
	codec = wm8993_codec;
	wm8993 = snd_soc_codec_get_drvdata(codec);

	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	if (ret < 0) {
		dev_err(codec->dev, "failed to create pcms\n");
		goto err;
	}

	snd_soc_add_controls(codec, wm8993_snd_controls,
			     ARRAY_SIZE(wm8993_snd_controls));
	if (wm8993->pdata.num_retune_configs != 0) {
		dev_dbg(codec->dev, "Using ReTune Mobile\n");
	} else {
		dev_dbg(codec->dev, "No ReTune Mobile, using normal EQ\n");
		snd_soc_add_controls(codec, wm8993_eq_controls,
				     ARRAY_SIZE(wm8993_eq_controls));
	}

	snd_soc_dapm_new_controls(codec, wm8993_dapm_widgets,
				  ARRAY_SIZE(wm8993_dapm_widgets));
	wm_hubs_add_analogue_controls(codec);

	snd_soc_dapm_add_routes(codec, routes, ARRAY_SIZE(routes));
	wm_hubs_add_analogue_routes(codec, wm8993->pdata.lineout1_diff,
				    wm8993->pdata.lineout2_diff);

	return ret;

err:
	return ret;
}

static int wm8993_remove(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);

	snd_soc_free_pcms(socdev);
	snd_soc_dapm_free(socdev);

	return 0;
}

#ifdef CONFIG_PM
static int wm8993_suspend(struct platform_device *pdev, pm_message_t state)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->card->codec;
	struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
	int fll_fout = wm8993->fll_fout;
	int fll_fref  = wm8993->fll_fref;
	int ret;

	/* Stop the FLL in an orderly fashion */
	ret = wm8993_set_fll(codec->dai, 0, 0, 0, 0);
	if (ret != 0) {
		dev_err(&pdev->dev, "Failed to stop FLL\n");
		return ret;
	}

	wm8993->fll_fout = fll_fout;
	wm8993->fll_fref = fll_fref;

	wm8993_set_bias_level(codec, SND_SOC_BIAS_OFF);

	return 0;
}

static int wm8993_resume(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->card->codec;
	struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
	int ret;

	wm8993_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	/* Restart the FLL? */
	if (wm8993->fll_fout) {
		int fll_fout = wm8993->fll_fout;
		int fll_fref  = wm8993->fll_fref;

		wm8993->fll_fref = 0;
		wm8993->fll_fout = 0;

		ret = wm8993_set_fll(codec->dai, 0, wm8993->fll_src,
				     fll_fref, fll_fout);
		if (ret != 0)
			dev_err(codec->dev, "Failed to restart FLL\n");
	}

	return 0;
}
#else
#define wm8993_suspend NULL
#define wm8993_resume NULL
#endif

struct snd_soc_codec_device soc_codec_dev_wm8993 = {
	.probe = 	wm8993_probe,
	.remove = 	wm8993_remove,
	.suspend =	wm8993_suspend,
	.resume =	wm8993_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_wm8993);

static int wm8993_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct wm8993_priv *wm8993;
	struct snd_soc_codec *codec;
	unsigned int val;
	int ret;
	int i;

	if (wm8993_codec) {
		dev_err(&i2c->dev, "A WM8993 is already registered\n");
		return -EINVAL;
	}

	wm8993 = kzalloc(sizeof(struct wm8993_priv), GFP_KERNEL);
	if (wm8993 == NULL)
		return -ENOMEM;

	codec = &wm8993->codec;
	if (i2c->dev.platform_data)
		memcpy(&wm8993->pdata, i2c->dev.platform_data,
		       sizeof(wm8993->pdata));

	mutex_init(&codec->mutex);
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	codec->name = "WM8993";
	codec->volatile_register = wm8993_volatile;
	codec->reg_cache = wm8993->reg_cache;
	codec->reg_cache_size = ARRAY_SIZE(wm8993->reg_cache);
	codec->bias_level = SND_SOC_BIAS_OFF;
	codec->set_bias_level = wm8993_set_bias_level;
	codec->dai = &wm8993_dai;
	codec->num_dai = 1;
	snd_soc_codec_set_drvdata(codec, wm8993);

	wm8993->hubs_data.hp_startup_mode = 1;
	wm8993->hubs_data.dcs_codes = -2;

	memcpy(wm8993->reg_cache, wm8993_reg_defaults,
	       sizeof(wm8993->reg_cache));

	ret = snd_soc_codec_set_cache_io(codec, 8, 16, SND_SOC_I2C);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
		goto err;
	}

	i2c_set_clientdata(i2c, wm8993);
	codec->control_data = i2c;
	wm8993_codec = codec;

	codec->dev = &i2c->dev;

	for (i = 0; i < ARRAY_SIZE(wm8993->supplies); i++)
		wm8993->supplies[i].supply = wm8993_supply_names[i];

	ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8993->supplies),
				 wm8993->supplies);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
		goto err;
	}

	ret = regulator_bulk_enable(ARRAY_SIZE(wm8993->supplies),
				    wm8993->supplies);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
		goto err_get;
	}

	val = snd_soc_read(codec, WM8993_SOFTWARE_RESET);
	if (val != wm8993_reg_defaults[WM8993_SOFTWARE_RESET]) {
		dev_err(codec->dev, "Invalid ID register value %x\n", val);
		ret = -EINVAL;
		goto err_enable;
	}

	ret = snd_soc_write(codec, WM8993_SOFTWARE_RESET, 0xffff);
	if (ret != 0)
		goto err_enable;

	codec->cache_only = 1;

	/* By default we're using the output mixers */
	wm8993->class_w_users = 2;

	/* Latch volume update bits and default ZC on */
	snd_soc_update_bits(codec, WM8993_RIGHT_DAC_DIGITAL_VOLUME,
			    WM8993_DAC_VU, WM8993_DAC_VU);
	snd_soc_update_bits(codec, WM8993_RIGHT_ADC_DIGITAL_VOLUME,
			    WM8993_ADC_VU, WM8993_ADC_VU);

	/* Manualy manage the HPOUT sequencing for independent stereo
	 * control. */
	snd_soc_update_bits(codec, WM8993_ANALOGUE_HP_0,
			    WM8993_HPOUT1_AUTO_PU, 0);

	/* Use automatic clock configuration */
	snd_soc_update_bits(codec, WM8993_CLOCKING_4, WM8993_SR_MODE, 0);

	wm_hubs_handle_analogue_pdata(codec, wm8993->pdata.lineout1_diff,
				      wm8993->pdata.lineout2_diff,
				      wm8993->pdata.lineout1fb,
				      wm8993->pdata.lineout2fb,
				      wm8993->pdata.jd_scthr,
				      wm8993->pdata.jd_thr,
				      wm8993->pdata.micbias1_lvl,
				      wm8993->pdata.micbias2_lvl);
			     
	ret = wm8993_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	if (ret != 0)
		goto err_enable;

	wm8993_dai.dev = codec->dev;

	ret = snd_soc_register_dai(&wm8993_dai);
	if (ret != 0)
		goto err_bias;

	ret = snd_soc_register_codec(codec);

	return 0;

err_bias:
	wm8993_set_bias_level(codec, SND_SOC_BIAS_OFF);
err_enable:
	regulator_bulk_disable(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
err_get:
	regulator_bulk_free(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
err:
	wm8993_codec = NULL;
	kfree(wm8993);
	return ret;
}

static int wm8993_i2c_remove(struct i2c_client *client)
{
	struct wm8993_priv *wm8993 = i2c_get_clientdata(client);

	snd_soc_unregister_codec(&wm8993->codec);
	snd_soc_unregister_dai(&wm8993_dai);

	wm8993_set_bias_level(&wm8993->codec, SND_SOC_BIAS_OFF);
	regulator_bulk_free(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
	kfree(wm8993);

	return 0;
}

static const struct i2c_device_id wm8993_i2c_id[] = {
	{ "wm8993", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, wm8993_i2c_id);

static struct i2c_driver wm8993_i2c_driver = {
	.driver = {
		.name = "WM8993",
		.owner = THIS_MODULE,
	},
	.probe = wm8993_i2c_probe,
	.remove = wm8993_i2c_remove,
	.id_table = wm8993_i2c_id,
};


static int __init wm8993_modinit(void)
{
	int ret;

	ret = i2c_add_driver(&wm8993_i2c_driver);
	if (ret != 0)
		pr_err("WM8993: Unable to register I2C driver: %d\n", ret);

	return ret;
}
module_init(wm8993_modinit);

static void __exit wm8993_exit(void)
{
	i2c_del_driver(&wm8993_i2c_driver);
}
module_exit(wm8993_exit);


MODULE_DESCRIPTION("ASoC WM8993 driver");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");