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wm8993.c

/*
 * wm8993.c -- WM8993 ALSA SoC audio driver
 *
 * Copyright 2009 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/spi/spi.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"

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 {
      u16 reg_cache[WM8993_REGISTER_COUNT];
      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;
};

static unsigned int wm8993_read_hw(struct snd_soc_codec *codec, u8 reg)
{
      struct i2c_msg xfer[2];
      u16 data;
      int ret;
      struct i2c_client *i2c = codec->control_data;

      /* Write register */
      xfer[0].addr = i2c->addr;
      xfer[0].flags = 0;
      xfer[0].len = 1;
      xfer[0].buf = &reg;

      /* Read data */
      xfer[1].addr = i2c->addr;
      xfer[1].flags = I2C_M_RD;
      xfer[1].len = 2;
      xfer[1].buf = (u8 *)&data;

      ret = i2c_transfer(i2c->adapter, xfer, 2);
      if (ret != 2) {
            dev_err(codec->dev, "Failed to read 0x%x: %d\n", reg, ret);
            return 0;
      }

      return (data >> 8) | ((data & 0xff) << 8);
}

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;
      }
}

static unsigned int wm8993_read(struct snd_soc_codec *codec,
                        unsigned int reg)
{
      u16 *reg_cache = codec->reg_cache;

      BUG_ON(reg > WM8993_MAX_REGISTER);

      if (wm8993_volatile(reg))
            return wm8993_read_hw(codec, reg);
      else
            return reg_cache[reg];
}

static int wm8993_write(struct snd_soc_codec *codec, unsigned int reg,
                  unsigned int value)
{
      u16 *reg_cache = codec->reg_cache;
      u8 data[3];
      int ret;

      BUG_ON(reg > WM8993_MAX_REGISTER);

      /* data is
       *   D15..D9 WM8993 register offset
       *   D8...D0 register data
       */
      data[0] = reg;
      data[1] = value >> 8;
      data[2] = value & 0x00ff;

      if (!wm8993_volatile(reg))
            reg_cache[reg] = value;

      ret = codec->hw_write(codec->control_data, data, 3);

      if (ret == 3)
            return 0;
      if (ret < 0)
            return ret;
      return -EIO;
}

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,
                    unsigned int Fref, unsigned int Fout)
{
      struct snd_soc_codec *codec = dai->codec;
      struct wm8993_priv *wm8993 = codec->private_data;
      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 = wm8993_read(codec, WM8993_FLL_CONTROL_1);
            reg1 &= ~WM8993_FLL_ENA;
            wm8993_write(codec, WM8993_FLL_CONTROL_1, reg1);

            return 0;
      }

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

      reg5 = wm8993_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 = wm8993_read(codec, WM8993_FLL_CONTROL_1);
      reg1 &= ~WM8993_FLL_ENA;
      wm8993_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;
      wm8993_write(codec, WM8993_FLL_CONTROL_1, reg1);

      wm8993_write(codec, WM8993_FLL_CONTROL_2,
                 (fll_div.fll_outdiv << WM8993_FLL_OUTDIV_SHIFT) |
                 (fll_div.fll_fratio << WM8993_FLL_FRATIO_SHIFT));
      wm8993_write(codec, WM8993_FLL_CONTROL_3, fll_div.k);

      reg4 = wm8993_read(codec, WM8993_FLL_CONTROL_4);
      reg4 &= ~WM8993_FLL_N_MASK;
      reg4 |= fll_div.n << WM8993_FLL_N_SHIFT;
      wm8993_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;
      wm8993_write(codec, WM8993_FLL_CONTROL_5, reg5);

      /* Enable the FLL */
      wm8993_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;

      return 0;
}

static int configure_clock(struct snd_soc_codec *codec)
{
      struct wm8993_priv *wm8993 = codec->private_data;
      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 = wm8993_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;
            }
            wm8993_write(codec, WM8993_CLOCKING_2, reg);
            break;

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

            reg = wm8993_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;
            }
            wm8993_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 Threashold 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 Threashold", 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 = codec->private_data;
      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 int wm8993_set_bias_level(struct snd_soc_codec *codec,
                         enum snd_soc_bias_level level)
{
      struct wm8993_priv *wm8993 = codec->private_data;

      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) {
                  /* 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);
            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 = codec->private_data;

      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 = codec->private_data;
      unsigned int aif1 = wm8993_read(codec, WM8993_AUDIO_INTERFACE_1);
      unsigned int aif4 = wm8993_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;
      }

      wm8993_write(codec, WM8993_AUDIO_INTERFACE_1, aif1);
      wm8993_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 = codec->private_data;
      int ret, i, best, best_val, cur_val;
      unsigned int clocking1, clocking3, aif1, aif4;

      clocking1 = wm8993_read(codec, WM8993_CLOCKING_1);
      clocking1 &= ~WM8993_BCLK_DIV_MASK;

      clocking3 = wm8993_read(codec, WM8993_CLOCKING_3);
      clocking3 &= ~(WM8993_CLK_SYS_RATE_MASK | WM8993_SAMPLE_RATE_MASK);

      aif1 = wm8993_read(codec, WM8993_AUDIO_INTERFACE_1);
      aif1 &= ~WM8993_AIF_WL_MASK;

      aif4 = wm8993_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;

      wm8993_write(codec, WM8993_CLOCKING_1, clocking1);
      wm8993_write(codec, WM8993_CLOCKING_3, clocking3);
      wm8993_write(codec, WM8993_AUDIO_INTERFACE_1, aif1);
      wm8993_write(codec, WM8993_AUDIO_INTERFACE_4, aif4);

      /* ReTune Mobile? */
      if (wm8993->pdata.num_retune_configs) {
            u16 eq1 = wm8993_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++)
                  wm8993_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 = wm8993_read(codec, WM8993_DAC_CTRL);

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

      wm8993_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 = codec->private_data;
      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 = codec->private_data;

      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);

      snd_soc_dapm_new_widgets(codec);

      ret = snd_soc_init_card(socdev);
      if (ret < 0) {
            dev_err(codec->dev, "failed to register card\n");
            goto card_err;
      }

      return ret;

card_err:
      snd_soc_free_pcms(socdev);
      snd_soc_dapm_free(socdev);
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;
}

struct snd_soc_codec_device soc_codec_dev_wm8993 = {
      .probe =    wm8993_probe,
      .remove =   wm8993_remove,
};
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;

      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->read = wm8993_read;
      codec->write = wm8993_write;
      codec->hw_write = (hw_write_t)i2c_master_send;
      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;
      codec->private_data = wm8993;

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

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

      codec->dev = &i2c->dev;

      val = wm8993_read_hw(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;
      }

      ret = wm8993_write(codec, WM8993_SOFTWARE_RESET, 0xffff);
      if (ret != 0)
            goto err;

      /* 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);

      if (!wm8993->pdata.lineout1_diff)
            snd_soc_update_bits(codec, WM8993_LINE_MIXER1,
                            WM8993_LINEOUT1_MODE,
                            WM8993_LINEOUT1_MODE);
      if (!wm8993->pdata.lineout2_diff)
            snd_soc_update_bits(codec, WM8993_LINE_MIXER2,
                            WM8993_LINEOUT2_MODE,
                            WM8993_LINEOUT2_MODE);

      if (wm8993->pdata.lineout1fb)
            snd_soc_update_bits(codec, WM8993_ADDITIONAL_CONTROL,
                            WM8993_LINEOUT1_FB, WM8993_LINEOUT1_FB);

      if (wm8993->pdata.lineout2fb)
            snd_soc_update_bits(codec, WM8993_ADDITIONAL_CONTROL,
                            WM8993_LINEOUT2_FB, WM8993_LINEOUT2_FB);

      /* Apply the microphone bias/detection configuration - the
       * platform data is directly applicable to the register. */
      snd_soc_update_bits(codec, WM8993_MICBIAS,
                      WM8993_JD_SCTHR_MASK | WM8993_JD_THR_MASK |
                      WM8993_MICB1_LVL | WM8993_MICB2_LVL,
                      wm8993->pdata.jd_scthr << WM8993_JD_SCTHR_SHIFT |
                      wm8993->pdata.jd_thr << WM8993_JD_THR_SHIFT |
                      wm8993->pdata.micbias1_lvl |
                      wm8993->pdata.micbias1_lvl << 1);

      ret = wm8993_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
      if (ret != 0)
            goto err;

      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:
      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);
      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");

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