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wm8510.c

/*
 * wm8510.c  --  WM8510 ALSA Soc Audio driver
 *
 * Copyright 2006 Wolfson Microelectronics PLC.
 *
 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>

#include "wm8510.h"

#define WM8510_VERSION "0.6"

struct snd_soc_codec_device soc_codec_dev_wm8510;

/*
 * wm8510 register cache
 * We can't read the WM8510 register space when we are
 * using 2 wire for device control, so we cache them instead.
 */
static const u16 wm8510_reg[WM8510_CACHEREGNUM] = {
      0x0000, 0x0000, 0x0000, 0x0000,
      0x0050, 0x0000, 0x0140, 0x0000,
      0x0000, 0x0000, 0x0000, 0x00ff,
      0x0000, 0x0000, 0x0100, 0x00ff,
      0x0000, 0x0000, 0x012c, 0x002c,
      0x002c, 0x002c, 0x002c, 0x0000,
      0x0032, 0x0000, 0x0000, 0x0000,
      0x0000, 0x0000, 0x0000, 0x0000,
      0x0038, 0x000b, 0x0032, 0x0000,
      0x0008, 0x000c, 0x0093, 0x00e9,
      0x0000, 0x0000, 0x0000, 0x0000,
      0x0003, 0x0010, 0x0000, 0x0000,
      0x0000, 0x0002, 0x0001, 0x0000,
      0x0000, 0x0000, 0x0039, 0x0000,
      0x0001,
};

#define WM8510_POWER1_BIASEN  0x08
#define WM8510_POWER1_BUFIOEN 0x10

#define wm8510_reset(c) snd_soc_write(c, WM8510_RESET, 0)

static const char *wm8510_companding[] = { "Off", "NC", "u-law", "A-law" };
static const char *wm8510_deemp[] = { "None", "32kHz", "44.1kHz", "48kHz" };
static const char *wm8510_alc[] = { "ALC", "Limiter" };

static const struct soc_enum wm8510_enum[] = {
      SOC_ENUM_SINGLE(WM8510_COMP, 1, 4, wm8510_companding), /* adc */
      SOC_ENUM_SINGLE(WM8510_COMP, 3, 4, wm8510_companding), /* dac */
      SOC_ENUM_SINGLE(WM8510_DAC,  4, 4, wm8510_deemp),
      SOC_ENUM_SINGLE(WM8510_ALC3,  8, 2, wm8510_alc),
};

static const struct snd_kcontrol_new wm8510_snd_controls[] = {

SOC_SINGLE("Digital Loopback Switch", WM8510_COMP, 0, 1, 0),

SOC_ENUM("DAC Companding", wm8510_enum[1]),
SOC_ENUM("ADC Companding", wm8510_enum[0]),

SOC_ENUM("Playback De-emphasis", wm8510_enum[2]),
SOC_SINGLE("DAC Inversion Switch", WM8510_DAC, 0, 1, 0),

SOC_SINGLE("Master Playback Volume", WM8510_DACVOL, 0, 127, 0),

SOC_SINGLE("High Pass Filter Switch", WM8510_ADC, 8, 1, 0),
SOC_SINGLE("High Pass Cut Off", WM8510_ADC, 4, 7, 0),
SOC_SINGLE("ADC Inversion Switch", WM8510_COMP, 0, 1, 0),

SOC_SINGLE("Capture Volume", WM8510_ADCVOL,  0, 127, 0),

SOC_SINGLE("DAC Playback Limiter Switch", WM8510_DACLIM1,  8, 1, 0),
SOC_SINGLE("DAC Playback Limiter Decay", WM8510_DACLIM1,  4, 15, 0),
SOC_SINGLE("DAC Playback Limiter Attack", WM8510_DACLIM1,  0, 15, 0),

SOC_SINGLE("DAC Playback Limiter Threshold", WM8510_DACLIM2,  4, 7, 0),
SOC_SINGLE("DAC Playback Limiter Boost", WM8510_DACLIM2,  0, 15, 0),

SOC_SINGLE("ALC Enable Switch", WM8510_ALC1,  8, 1, 0),
SOC_SINGLE("ALC Capture Max Gain", WM8510_ALC1,  3, 7, 0),
SOC_SINGLE("ALC Capture Min Gain", WM8510_ALC1,  0, 7, 0),

SOC_SINGLE("ALC Capture ZC Switch", WM8510_ALC2,  8, 1, 0),
SOC_SINGLE("ALC Capture Hold", WM8510_ALC2,  4, 7, 0),
SOC_SINGLE("ALC Capture Target", WM8510_ALC2,  0, 15, 0),

SOC_ENUM("ALC Capture Mode", wm8510_enum[3]),
SOC_SINGLE("ALC Capture Decay", WM8510_ALC3,  4, 15, 0),
SOC_SINGLE("ALC Capture Attack", WM8510_ALC3,  0, 15, 0),

SOC_SINGLE("ALC Capture Noise Gate Switch", WM8510_NGATE,  3, 1, 0),
SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8510_NGATE,  0, 7, 0),

SOC_SINGLE("Capture PGA ZC Switch", WM8510_INPPGA,  7, 1, 0),
SOC_SINGLE("Capture PGA Volume", WM8510_INPPGA,  0, 63, 0),

SOC_SINGLE("Speaker Playback ZC Switch", WM8510_SPKVOL,  7, 1, 0),
SOC_SINGLE("Speaker Playback Switch", WM8510_SPKVOL,  6, 1, 1),
SOC_SINGLE("Speaker Playback Volume", WM8510_SPKVOL,  0, 63, 0),
SOC_SINGLE("Speaker Boost", WM8510_OUTPUT, 2, 1, 0),

SOC_SINGLE("Capture Boost(+20dB)", WM8510_ADCBOOST,  8, 1, 0),
SOC_SINGLE("Mono Playback Switch", WM8510_MONOMIX, 6, 1, 1),
};

/* Speaker Output Mixer */
static const struct snd_kcontrol_new wm8510_speaker_mixer_controls[] = {
SOC_DAPM_SINGLE("Line Bypass Switch", WM8510_SPKMIX, 1, 1, 0),
SOC_DAPM_SINGLE("Aux Playback Switch", WM8510_SPKMIX, 5, 1, 0),
SOC_DAPM_SINGLE("PCM Playback Switch", WM8510_SPKMIX, 0, 1, 0),
};

/* Mono Output Mixer */
static const struct snd_kcontrol_new wm8510_mono_mixer_controls[] = {
SOC_DAPM_SINGLE("Line Bypass Switch", WM8510_MONOMIX, 1, 1, 0),
SOC_DAPM_SINGLE("Aux Playback Switch", WM8510_MONOMIX, 2, 1, 0),
SOC_DAPM_SINGLE("PCM Playback Switch", WM8510_MONOMIX, 0, 1, 0),
};

static const struct snd_kcontrol_new wm8510_boost_controls[] = {
SOC_DAPM_SINGLE("Mic PGA Switch", WM8510_INPPGA,  6, 1, 1),
SOC_DAPM_SINGLE("Aux Volume", WM8510_ADCBOOST, 0, 7, 0),
SOC_DAPM_SINGLE("Mic Volume", WM8510_ADCBOOST, 4, 7, 0),
};

static const struct snd_kcontrol_new wm8510_micpga_controls[] = {
SOC_DAPM_SINGLE("MICP Switch", WM8510_INPUT, 0, 1, 0),
SOC_DAPM_SINGLE("MICN Switch", WM8510_INPUT, 1, 1, 0),
SOC_DAPM_SINGLE("AUX Switch", WM8510_INPUT, 2, 1, 0),
};

static const struct snd_soc_dapm_widget wm8510_dapm_widgets[] = {
SND_SOC_DAPM_MIXER("Speaker Mixer", WM8510_POWER3, 2, 0,
      &wm8510_speaker_mixer_controls[0],
      ARRAY_SIZE(wm8510_speaker_mixer_controls)),
SND_SOC_DAPM_MIXER("Mono Mixer", WM8510_POWER3, 3, 0,
      &wm8510_mono_mixer_controls[0],
      ARRAY_SIZE(wm8510_mono_mixer_controls)),
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8510_POWER3, 0, 0),
SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8510_POWER2, 0, 0),
SND_SOC_DAPM_PGA("Aux Input", WM8510_POWER1, 6, 0, NULL, 0),
SND_SOC_DAPM_PGA("SpkN Out", WM8510_POWER3, 5, 0, NULL, 0),
SND_SOC_DAPM_PGA("SpkP Out", WM8510_POWER3, 6, 0, NULL, 0),
SND_SOC_DAPM_PGA("Mono Out", WM8510_POWER3, 7, 0, NULL, 0),

SND_SOC_DAPM_MIXER("Mic PGA", WM8510_POWER2, 2, 0,
               &wm8510_micpga_controls[0],
               ARRAY_SIZE(wm8510_micpga_controls)),
SND_SOC_DAPM_MIXER("Boost Mixer", WM8510_POWER2, 4, 0,
      &wm8510_boost_controls[0],
      ARRAY_SIZE(wm8510_boost_controls)),

SND_SOC_DAPM_MICBIAS("Mic Bias", WM8510_POWER1, 4, 0),

SND_SOC_DAPM_INPUT("MICN"),
SND_SOC_DAPM_INPUT("MICP"),
SND_SOC_DAPM_INPUT("AUX"),
SND_SOC_DAPM_OUTPUT("MONOOUT"),
SND_SOC_DAPM_OUTPUT("SPKOUTP"),
SND_SOC_DAPM_OUTPUT("SPKOUTN"),
};

static const struct snd_soc_dapm_route audio_map[] = {
      /* Mono output mixer */
      {"Mono Mixer", "PCM Playback Switch", "DAC"},
      {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
      {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},

      /* Speaker output mixer */
      {"Speaker Mixer", "PCM Playback Switch", "DAC"},
      {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
      {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},

      /* Outputs */
      {"Mono Out", NULL, "Mono Mixer"},
      {"MONOOUT", NULL, "Mono Out"},
      {"SpkN Out", NULL, "Speaker Mixer"},
      {"SpkP Out", NULL, "Speaker Mixer"},
      {"SPKOUTN", NULL, "SpkN Out"},
      {"SPKOUTP", NULL, "SpkP Out"},

      /* Microphone PGA */
      {"Mic PGA", "MICN Switch", "MICN"},
      {"Mic PGA", "MICP Switch", "MICP"},
      { "Mic PGA", "AUX Switch", "Aux Input" },

      /* Boost Mixer */
      {"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
      {"Boost Mixer", "Mic Volume", "MICP"},
      {"Boost Mixer", "Aux Volume", "Aux Input"},

      {"ADC", NULL, "Boost Mixer"},
};

static int wm8510_add_widgets(struct snd_soc_codec *codec)
{
      snd_soc_dapm_new_controls(codec, wm8510_dapm_widgets,
                          ARRAY_SIZE(wm8510_dapm_widgets));

      snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));

      snd_soc_dapm_new_widgets(codec);
      return 0;
}

struct pll_ {
      unsigned int pre_div:4; /* prescale - 1 */
      unsigned int n:4;
      unsigned int k;
};

static struct pll_ pll_div;

/* The size in bits of the pll divide multiplied by 10
 * to allow rounding later */
#define FIXED_PLL_SIZE ((1 << 24) * 10)

static void pll_factors(unsigned int target, unsigned int source)
{
      unsigned long long Kpart;
      unsigned int K, Ndiv, Nmod;

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

      if ((Ndiv < 6) || (Ndiv > 12))
            printk(KERN_WARNING
                  "WM8510 N value %u outwith recommended range!d\n",
                  Ndiv);

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

      do_div(Kpart, source);

      K = Kpart & 0xFFFFFFFF;

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

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

      pll_div.k = K;
}

static int wm8510_set_dai_pll(struct snd_soc_dai *codec_dai,
            int pll_id, unsigned int freq_in, unsigned int freq_out)
{
      struct snd_soc_codec *codec = codec_dai->codec;
      u16 reg;

      if (freq_in == 0 || freq_out == 0) {
            /* Clock CODEC directly from MCLK */
            reg = snd_soc_read(codec, WM8510_CLOCK);
            snd_soc_write(codec, WM8510_CLOCK, reg & 0x0ff);

            /* Turn off PLL */
            reg = snd_soc_read(codec, WM8510_POWER1);
            snd_soc_write(codec, WM8510_POWER1, reg & 0x1df);
            return 0;
      }

      pll_factors(freq_out*4, freq_in);

      snd_soc_write(codec, WM8510_PLLN, (pll_div.pre_div << 4) | pll_div.n);
      snd_soc_write(codec, WM8510_PLLK1, pll_div.k >> 18);
      snd_soc_write(codec, WM8510_PLLK2, (pll_div.k >> 9) & 0x1ff);
      snd_soc_write(codec, WM8510_PLLK3, pll_div.k & 0x1ff);
      reg = snd_soc_read(codec, WM8510_POWER1);
      snd_soc_write(codec, WM8510_POWER1, reg | 0x020);

      /* Run CODEC from PLL instead of MCLK */
      reg = snd_soc_read(codec, WM8510_CLOCK);
      snd_soc_write(codec, WM8510_CLOCK, reg | 0x100);

      return 0;
}

/*
 * Configure WM8510 clock dividers.
 */
static int wm8510_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
            int div_id, int div)
{
      struct snd_soc_codec *codec = codec_dai->codec;
      u16 reg;

      switch (div_id) {
      case WM8510_OPCLKDIV:
            reg = snd_soc_read(codec, WM8510_GPIO) & 0x1cf;
            snd_soc_write(codec, WM8510_GPIO, reg | div);
            break;
      case WM8510_MCLKDIV:
            reg = snd_soc_read(codec, WM8510_CLOCK) & 0x11f;
            snd_soc_write(codec, WM8510_CLOCK, reg | div);
            break;
      case WM8510_ADCCLK:
            reg = snd_soc_read(codec, WM8510_ADC) & 0x1f7;
            snd_soc_write(codec, WM8510_ADC, reg | div);
            break;
      case WM8510_DACCLK:
            reg = snd_soc_read(codec, WM8510_DAC) & 0x1f7;
            snd_soc_write(codec, WM8510_DAC, reg | div);
            break;
      case WM8510_BCLKDIV:
            reg = snd_soc_read(codec, WM8510_CLOCK) & 0x1e3;
            snd_soc_write(codec, WM8510_CLOCK, reg | div);
            break;
      default:
            return -EINVAL;
      }

      return 0;
}

static int wm8510_set_dai_fmt(struct snd_soc_dai *codec_dai,
            unsigned int fmt)
{
      struct snd_soc_codec *codec = codec_dai->codec;
      u16 iface = 0;
      u16 clk = snd_soc_read(codec, WM8510_CLOCK) & 0x1fe;

      /* set master/slave audio interface */
      switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
      case SND_SOC_DAIFMT_CBM_CFM:
            clk |= 0x0001;
            break;
      case SND_SOC_DAIFMT_CBS_CFS:
            break;
      default:
            return -EINVAL;
      }

      /* interface format */
      switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
      case SND_SOC_DAIFMT_I2S:
            iface |= 0x0010;
            break;
      case SND_SOC_DAIFMT_RIGHT_J:
            break;
      case SND_SOC_DAIFMT_LEFT_J:
            iface |= 0x0008;
            break;
      case SND_SOC_DAIFMT_DSP_A:
            iface |= 0x00018;
            break;
      default:
            return -EINVAL;
      }

      /* clock inversion */
      switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
      case SND_SOC_DAIFMT_NB_NF:
            break;
      case SND_SOC_DAIFMT_IB_IF:
            iface |= 0x0180;
            break;
      case SND_SOC_DAIFMT_IB_NF:
            iface |= 0x0100;
            break;
      case SND_SOC_DAIFMT_NB_IF:
            iface |= 0x0080;
            break;
      default:
            return -EINVAL;
      }

      snd_soc_write(codec, WM8510_IFACE, iface);
      snd_soc_write(codec, WM8510_CLOCK, clk);
      return 0;
}

static int wm8510_pcm_hw_params(struct snd_pcm_substream *substream,
                        struct snd_pcm_hw_params *params,
                        struct snd_soc_dai *dai)
{
      struct snd_soc_pcm_runtime *rtd = substream->private_data;
      struct snd_soc_device *socdev = rtd->socdev;
      struct snd_soc_codec *codec = socdev->card->codec;
      u16 iface = snd_soc_read(codec, WM8510_IFACE) & 0x19f;
      u16 adn = snd_soc_read(codec, WM8510_ADD) & 0x1f1;

      /* bit size */
      switch (params_format(params)) {
      case SNDRV_PCM_FORMAT_S16_LE:
            break;
      case SNDRV_PCM_FORMAT_S20_3LE:
            iface |= 0x0020;
            break;
      case SNDRV_PCM_FORMAT_S24_LE:
            iface |= 0x0040;
            break;
      case SNDRV_PCM_FORMAT_S32_LE:
            iface |= 0x0060;
            break;
      }

      /* filter coefficient */
      switch (params_rate(params)) {
      case SNDRV_PCM_RATE_8000:
            adn |= 0x5 << 1;
            break;
      case SNDRV_PCM_RATE_11025:
            adn |= 0x4 << 1;
            break;
      case SNDRV_PCM_RATE_16000:
            adn |= 0x3 << 1;
            break;
      case SNDRV_PCM_RATE_22050:
            adn |= 0x2 << 1;
            break;
      case SNDRV_PCM_RATE_32000:
            adn |= 0x1 << 1;
            break;
      case SNDRV_PCM_RATE_44100:
      case SNDRV_PCM_RATE_48000:
            break;
      }

      snd_soc_write(codec, WM8510_IFACE, iface);
      snd_soc_write(codec, WM8510_ADD, adn);
      return 0;
}

static int wm8510_mute(struct snd_soc_dai *dai, int mute)
{
      struct snd_soc_codec *codec = dai->codec;
      u16 mute_reg = snd_soc_read(codec, WM8510_DAC) & 0xffbf;

      if (mute)
            snd_soc_write(codec, WM8510_DAC, mute_reg | 0x40);
      else
            snd_soc_write(codec, WM8510_DAC, mute_reg);
      return 0;
}

/* liam need to make this lower power with dapm */
static int wm8510_set_bias_level(struct snd_soc_codec *codec,
      enum snd_soc_bias_level level)
{
      u16 power1 = snd_soc_read(codec, WM8510_POWER1) & ~0x3;

      switch (level) {
      case SND_SOC_BIAS_ON:
      case SND_SOC_BIAS_PREPARE:
            power1 |= 0x1;  /* VMID 50k */
            snd_soc_write(codec, WM8510_POWER1, power1);
            break;

      case SND_SOC_BIAS_STANDBY:
            power1 |= WM8510_POWER1_BIASEN | WM8510_POWER1_BUFIOEN;

            if (codec->bias_level == SND_SOC_BIAS_OFF) {
                  /* Initial cap charge at VMID 5k */
                  snd_soc_write(codec, WM8510_POWER1, power1 | 0x3);
                  mdelay(100);
            }

            power1 |= 0x2;  /* VMID 500k */
            snd_soc_write(codec, WM8510_POWER1, power1);
            break;

      case SND_SOC_BIAS_OFF:
            snd_soc_write(codec, WM8510_POWER1, 0);
            snd_soc_write(codec, WM8510_POWER2, 0);
            snd_soc_write(codec, WM8510_POWER3, 0);
            break;
      }

      codec->bias_level = level;
      return 0;
}

#define WM8510_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
            SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
            SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)

#define WM8510_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
      SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)

static struct snd_soc_dai_ops wm8510_dai_ops = {
      .hw_params  = wm8510_pcm_hw_params,
      .digital_mute     = wm8510_mute,
      .set_fmt    = wm8510_set_dai_fmt,
      .set_clkdiv = wm8510_set_dai_clkdiv,
      .set_pll    = wm8510_set_dai_pll,
};

struct snd_soc_dai wm8510_dai = {
      .name = "WM8510 HiFi",
      .playback = {
            .stream_name = "Playback",
            .channels_min = 2,
            .channels_max = 2,
            .rates = WM8510_RATES,
            .formats = WM8510_FORMATS,},
      .capture = {
            .stream_name = "Capture",
            .channels_min = 2,
            .channels_max = 2,
            .rates = WM8510_RATES,
            .formats = WM8510_FORMATS,},
      .ops = &wm8510_dai_ops,
      .symmetric_rates = 1,
};
EXPORT_SYMBOL_GPL(wm8510_dai);

static int wm8510_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;

      wm8510_set_bias_level(codec, SND_SOC_BIAS_OFF);
      return 0;
}

static int wm8510_resume(struct platform_device *pdev)
{
      struct snd_soc_device *socdev = platform_get_drvdata(pdev);
      struct snd_soc_codec *codec = socdev->card->codec;
      int i;
      u8 data[2];
      u16 *cache = codec->reg_cache;

      /* Sync reg_cache with the hardware */
      for (i = 0; i < ARRAY_SIZE(wm8510_reg); i++) {
            data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
            data[1] = cache[i] & 0x00ff;
            codec->hw_write(codec->control_data, data, 2);
      }
      wm8510_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
      wm8510_set_bias_level(codec, codec->suspend_bias_level);
      return 0;
}

/*
 * initialise the WM8510 driver
 * register the mixer and dsp interfaces with the kernel
 */
static int wm8510_init(struct snd_soc_device *socdev,
                   enum snd_soc_control_type control)
{
      struct snd_soc_codec *codec = socdev->card->codec;
      int ret = 0;

      codec->name = "WM8510";
      codec->owner = THIS_MODULE;
      codec->set_bias_level = wm8510_set_bias_level;
      codec->dai = &wm8510_dai;
      codec->num_dai = 1;
      codec->reg_cache_size = ARRAY_SIZE(wm8510_reg);
      codec->reg_cache = kmemdup(wm8510_reg, sizeof(wm8510_reg), GFP_KERNEL);

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

      ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
      if (ret < 0) {
            printk(KERN_ERR "wm8510: failed to set cache I/O: %d\n",
                   ret);
            goto err;
      }

      wm8510_reset(codec);

      /* register pcms */
      ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
      if (ret < 0) {
            printk(KERN_ERR "wm8510: failed to create pcms\n");
            goto err;
      }

      /* power on device */
      codec->bias_level = SND_SOC_BIAS_OFF;
      wm8510_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
      snd_soc_add_controls(codec, wm8510_snd_controls,
                        ARRAY_SIZE(wm8510_snd_controls));
      wm8510_add_widgets(codec);
      ret = snd_soc_init_card(socdev);
      if (ret < 0) {
            printk(KERN_ERR "wm8510: failed to register card\n");
            goto card_err;
      }
      return ret;

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

static struct snd_soc_device *wm8510_socdev;

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

/*
 * WM8510 2 wire address is 0x1a
 */

static int wm8510_i2c_probe(struct i2c_client *i2c,
                      const struct i2c_device_id *id)
{
      struct snd_soc_device *socdev = wm8510_socdev;
      struct snd_soc_codec *codec = socdev->card->codec;
      int ret;

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

      ret = wm8510_init(socdev, SND_SOC_I2C);
      if (ret < 0)
            pr_err("failed to initialise WM8510\n");

      return ret;
}

static int wm8510_i2c_remove(struct i2c_client *client)
{
      struct snd_soc_codec *codec = i2c_get_clientdata(client);
      kfree(codec->reg_cache);
      return 0;
}

static const struct i2c_device_id wm8510_i2c_id[] = {
      { "wm8510", 0 },
      { }
};
MODULE_DEVICE_TABLE(i2c, wm8510_i2c_id);

static struct i2c_driver wm8510_i2c_driver = {
      .driver = {
            .name = "WM8510 I2C Codec",
            .owner = THIS_MODULE,
      },
      .probe =    wm8510_i2c_probe,
      .remove =   wm8510_i2c_remove,
      .id_table = wm8510_i2c_id,
};

static int wm8510_add_i2c_device(struct platform_device *pdev,
                         const struct wm8510_setup_data *setup)
{
      struct i2c_board_info info;
      struct i2c_adapter *adapter;
      struct i2c_client *client;
      int ret;

      ret = i2c_add_driver(&wm8510_i2c_driver);
      if (ret != 0) {
            dev_err(&pdev->dev, "can't add i2c driver\n");
            return ret;
      }

      memset(&info, 0, sizeof(struct i2c_board_info));
      info.addr = setup->i2c_address;
      strlcpy(info.type, "wm8510", I2C_NAME_SIZE);

      adapter = i2c_get_adapter(setup->i2c_bus);
      if (!adapter) {
            dev_err(&pdev->dev, "can't get i2c adapter %d\n",
                  setup->i2c_bus);
            goto err_driver;
      }

      client = i2c_new_device(adapter, &info);
      i2c_put_adapter(adapter);
      if (!client) {
            dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
                  (unsigned int)info.addr);
            goto err_driver;
      }

      return 0;

err_driver:
      i2c_del_driver(&wm8510_i2c_driver);
      return -ENODEV;
}
#endif

#if defined(CONFIG_SPI_MASTER)
static int __devinit wm8510_spi_probe(struct spi_device *spi)
{
      struct snd_soc_device *socdev = wm8510_socdev;
      struct snd_soc_codec *codec = socdev->card->codec;
      int ret;

      codec->control_data = spi;

      ret = wm8510_init(socdev, SND_SOC_SPI);
      if (ret < 0)
            dev_err(&spi->dev, "failed to initialise WM8510\n");

      return ret;
}

static int __devexit wm8510_spi_remove(struct spi_device *spi)
{
      return 0;
}

static struct spi_driver wm8510_spi_driver = {
      .driver = {
            .name = "wm8510",
            .bus  = &spi_bus_type,
            .owner      = THIS_MODULE,
      },
      .probe            = wm8510_spi_probe,
      .remove           = __devexit_p(wm8510_spi_remove),
};
#endif /* CONFIG_SPI_MASTER */

static int wm8510_probe(struct platform_device *pdev)
{
      struct snd_soc_device *socdev = platform_get_drvdata(pdev);
      struct wm8510_setup_data *setup;
      struct snd_soc_codec *codec;
      int ret = 0;

      pr_info("WM8510 Audio Codec %s", WM8510_VERSION);

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

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

      wm8510_socdev = socdev;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
      if (setup->i2c_address) {
            ret = wm8510_add_i2c_device(pdev, setup);
      }
#endif
#if defined(CONFIG_SPI_MASTER)
      if (setup->spi) {
            ret = spi_register_driver(&wm8510_spi_driver);
            if (ret != 0)
                  printk(KERN_ERR "can't add spi driver");
      }
#endif

      if (ret != 0)
            kfree(codec);
      return ret;
}

/* power down chip */
static int wm8510_remove(struct platform_device *pdev)
{
      struct snd_soc_device *socdev = platform_get_drvdata(pdev);
      struct snd_soc_codec *codec = socdev->card->codec;

      if (codec->control_data)
            wm8510_set_bias_level(codec, SND_SOC_BIAS_OFF);

      snd_soc_free_pcms(socdev);
      snd_soc_dapm_free(socdev);
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
      i2c_unregister_device(codec->control_data);
      i2c_del_driver(&wm8510_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
      spi_unregister_driver(&wm8510_spi_driver);
#endif
      kfree(codec);

      return 0;
}

struct snd_soc_codec_device soc_codec_dev_wm8510 = {
      .probe =    wm8510_probe,
      .remove =   wm8510_remove,
      .suspend =  wm8510_suspend,
      .resume =   wm8510_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_wm8510);

static int __init wm8510_modinit(void)
{
      return snd_soc_register_dai(&wm8510_dai);
}
module_init(wm8510_modinit);

static void __exit wm8510_exit(void)
{
      snd_soc_unregister_dai(&wm8510_dai);
}
module_exit(wm8510_exit);

MODULE_DESCRIPTION("ASoC WM8510 driver");
MODULE_AUTHOR("Liam Girdwood");
MODULE_LICENSE("GPL");

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