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uda1380.c

/*
 * uda1380.c - Philips UDA1380 ALSA SoC audio driver
 *
 * 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.
 *
 * Copyright (c) 2007 Philipp Zabel <philipp.zabel@gmail.com>
 * Improved support for DAPM and audio routing/mixing capabilities,
 * added TLV support.
 *
 * Modified by Richard Purdie <richard@openedhand.com> to fit into SoC
 * codec model.
 *
 * Copyright (c) 2005 Giorgio Padrin <giorgio@mandarinlogiq.org>
 * Copyright 2005 Openedhand Ltd.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/ioctl.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/initval.h>
#include <sound/info.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/tlv.h>

#include "uda1380.h"

#define UDA1380_VERSION "0.6"
#define AUDIO_NAME "uda1380"

/*
 * uda1380 register cache
 */
static const u16 uda1380_reg[UDA1380_CACHEREGNUM] = {
      0x0502, 0x0000, 0x0000, 0x3f3f,
      0x0202, 0x0000, 0x0000, 0x0000,
      0x0000, 0x0000, 0x0000, 0x0000,
      0x0000, 0x0000, 0x0000, 0x0000,
      0x0000, 0xff00, 0x0000, 0x4800,
      0x0000, 0x0000, 0x0000, 0x0000,
      0x0000, 0x0000, 0x0000, 0x0000,
      0x0000, 0x0000, 0x0000, 0x0000,
      0x0000, 0x8000, 0x0002, 0x0000,
};

/*
 * read uda1380 register cache
 */
static inline unsigned int uda1380_read_reg_cache(struct snd_soc_codec *codec,
      unsigned int reg)
{
      u16 *cache = codec->reg_cache;
      if (reg == UDA1380_RESET)
            return 0;
      if (reg >= UDA1380_CACHEREGNUM)
            return -1;
      return cache[reg];
}

/*
 * write uda1380 register cache
 */
static inline void uda1380_write_reg_cache(struct snd_soc_codec *codec,
      u16 reg, unsigned int value)
{
      u16 *cache = codec->reg_cache;
      if (reg >= UDA1380_CACHEREGNUM)
            return;
      cache[reg] = value;
}

/*
 * write to the UDA1380 register space
 */
static int uda1380_write(struct snd_soc_codec *codec, unsigned int reg,
      unsigned int value)
{
      u8 data[3];

      /* data is
       *   data[0] is register offset
       *   data[1] is MS byte
       *   data[2] is LS byte
       */
      data[0] = reg;
      data[1] = (value & 0xff00) >> 8;
      data[2] = value & 0x00ff;

      uda1380_write_reg_cache(codec, reg, value);

      /* the interpolator & decimator regs must only be written when the
       * codec DAI is active.
       */
      if (!codec->active && (reg >= UDA1380_MVOL))
            return 0;
      pr_debug("uda1380: hw write %x val %x\n", reg, value);
      if (codec->hw_write(codec->control_data, data, 3) == 3) {
            unsigned int val;
            i2c_master_send(codec->control_data, data, 1);
            i2c_master_recv(codec->control_data, data, 2);
            val = (data[0]<<8) | data[1];
            if (val != value) {
                  pr_debug("uda1380: READ BACK VAL %x\n",
                              (data[0]<<8) | data[1]);
                  return -EIO;
            }
            return 0;
      } else
            return -EIO;
}

#define uda1380_reset(c)      uda1380_write(c, UDA1380_RESET, 0)

/* declarations of ALSA reg_elem_REAL controls */
static const char *uda1380_deemp[] = {
      "None",
      "32kHz",
      "44.1kHz",
      "48kHz",
      "96kHz",
};
static const char *uda1380_input_sel[] = {
      "Line",
      "Mic + Line R",
      "Line L",
      "Mic",
};
static const char *uda1380_output_sel[] = {
      "DAC",
      "Analog Mixer",
};
static const char *uda1380_spf_mode[] = {
      "Flat",
      "Minimum1",
      "Minimum2",
      "Maximum"
};
static const char *uda1380_capture_sel[] = {
      "ADC",
      "Digital Mixer"
};
static const char *uda1380_sel_ns[] = {
      "3rd-order",
      "5th-order"
};
static const char *uda1380_mix_control[] = {
      "off",
      "PCM only",
      "before sound processing",
      "after sound processing"
};
static const char *uda1380_sdet_setting[] = {
      "3200",
      "4800",
      "9600",
      "19200"
};
static const char *uda1380_os_setting[] = {
      "single-speed",
      "double-speed (no mixing)",
      "quad-speed (no mixing)"
};

static const struct soc_enum uda1380_deemp_enum[] = {
      SOC_ENUM_SINGLE(UDA1380_DEEMP, 8, 5, uda1380_deemp),
      SOC_ENUM_SINGLE(UDA1380_DEEMP, 0, 5, uda1380_deemp),
};
static const struct soc_enum uda1380_input_sel_enum =
      SOC_ENUM_SINGLE(UDA1380_ADC, 2, 4, uda1380_input_sel);            /* SEL_MIC, SEL_LNA */
static const struct soc_enum uda1380_output_sel_enum =
      SOC_ENUM_SINGLE(UDA1380_PM, 7, 2, uda1380_output_sel);            /* R02_EN_AVC */
static const struct soc_enum uda1380_spf_enum =
      SOC_ENUM_SINGLE(UDA1380_MODE, 14, 4, uda1380_spf_mode);           /* M */
static const struct soc_enum uda1380_capture_sel_enum =
      SOC_ENUM_SINGLE(UDA1380_IFACE, 6, 2, uda1380_capture_sel);  /* SEL_SOURCE */
static const struct soc_enum uda1380_sel_ns_enum =
      SOC_ENUM_SINGLE(UDA1380_MIXER, 14, 2, uda1380_sel_ns);            /* SEL_NS */
static const struct soc_enum uda1380_mix_enum =
      SOC_ENUM_SINGLE(UDA1380_MIXER, 12, 4, uda1380_mix_control); /* MIX, MIX_POS */
static const struct soc_enum uda1380_sdet_enum =
      SOC_ENUM_SINGLE(UDA1380_MIXER, 4, 4, uda1380_sdet_setting); /* SD_VALUE */
static const struct soc_enum uda1380_os_enum =
      SOC_ENUM_SINGLE(UDA1380_MIXER, 0, 3, uda1380_os_setting);   /* OS */

/*
 * from -48 dB in 1.5 dB steps (mute instead of -49.5 dB)
 */
static DECLARE_TLV_DB_SCALE(amix_tlv, -4950, 150, 1);

/*
 * from -78 dB in 1 dB steps (3 dB steps, really. LSB are ignored),
 * from -66 dB in 0.5 dB steps (2 dB steps, really) and
 * from -52 dB in 0.25 dB steps
 */
static const unsigned int mvol_tlv[] = {
      TLV_DB_RANGE_HEAD(3),
      0, 15, TLV_DB_SCALE_ITEM(-8200, 100, 1),
      16, 43, TLV_DB_SCALE_ITEM(-6600, 50, 0),
      44, 252, TLV_DB_SCALE_ITEM(-5200, 25, 0),
};

/*
 * from -72 dB in 1.5 dB steps (6 dB steps really),
 * from -66 dB in 0.75 dB steps (3 dB steps really),
 * from -60 dB in 0.5 dB steps (2 dB steps really) and
 * from -46 dB in 0.25 dB steps
 */
static const unsigned int vc_tlv[] = {
      TLV_DB_RANGE_HEAD(4),
      0, 7, TLV_DB_SCALE_ITEM(-7800, 150, 1),
      8, 15, TLV_DB_SCALE_ITEM(-6600, 75, 0),
      16, 43, TLV_DB_SCALE_ITEM(-6000, 50, 0),
      44, 228, TLV_DB_SCALE_ITEM(-4600, 25, 0),
};

/* from 0 to 6 dB in 2 dB steps if SPF mode != flat */
static DECLARE_TLV_DB_SCALE(tr_tlv, 0, 200, 0);

/* from 0 to 24 dB in 2 dB steps, if SPF mode == maximum, otherwise cuts
 * off at 18 dB max) */
static DECLARE_TLV_DB_SCALE(bb_tlv, 0, 200, 0);

/* from -63 to 24 dB in 0.5 dB steps (-128...48) */
static DECLARE_TLV_DB_SCALE(dec_tlv, -6400, 50, 1);

/* from 0 to 24 dB in 3 dB steps */
static DECLARE_TLV_DB_SCALE(pga_tlv, 0, 300, 0);

/* from 0 to 30 dB in 2 dB steps */
static DECLARE_TLV_DB_SCALE(vga_tlv, 0, 200, 0);

static const struct snd_kcontrol_new uda1380_snd_controls[] = {
      SOC_DOUBLE_TLV("Analog Mixer Volume", UDA1380_AMIX, 0, 8, 44, 1, amix_tlv),   /* AVCR, AVCL */
      SOC_DOUBLE_TLV("Master Playback Volume", UDA1380_MVOL, 0, 8, 252, 1, mvol_tlv),     /* MVCL, MVCR */
      SOC_SINGLE_TLV("ADC Playback Volume", UDA1380_MIXVOL, 8, 228, 1, vc_tlv),     /* VC2 */
      SOC_SINGLE_TLV("PCM Playback Volume", UDA1380_MIXVOL, 0, 228, 1, vc_tlv),     /* VC1 */
      SOC_ENUM("Sound Processing Filter", uda1380_spf_enum),                        /* M */
      SOC_DOUBLE_TLV("Tone Control - Treble", UDA1380_MODE, 4, 12, 3, 0, tr_tlv),   /* TRL, TRR */
      SOC_DOUBLE_TLV("Tone Control - Bass", UDA1380_MODE, 0, 8, 15, 0, bb_tlv),     /* BBL, BBR */
/**/  SOC_SINGLE("Master Playback Switch", UDA1380_DEEMP, 14, 1, 1),          /* MTM */
      SOC_SINGLE("ADC Playback Switch", UDA1380_DEEMP, 11, 1, 1),       /* MT2 from decimation filter */
      SOC_ENUM("ADC Playback De-emphasis", uda1380_deemp_enum[0]),            /* DE2 */
      SOC_SINGLE("PCM Playback Switch", UDA1380_DEEMP, 3, 1, 1),        /* MT1, from digital data input */
      SOC_ENUM("PCM Playback De-emphasis", uda1380_deemp_enum[1]),            /* DE1 */
      SOC_SINGLE("DAC Polarity inverting Switch", UDA1380_MIXER, 15, 1, 0),   /* DA_POL_INV */
      SOC_ENUM("Noise Shaper", uda1380_sel_ns_enum),                    /* SEL_NS */
      SOC_ENUM("Digital Mixer Signal Control", uda1380_mix_enum),       /* MIX_POS, MIX */
      SOC_SINGLE("Silence Switch", UDA1380_MIXER, 7, 1, 0),             /* SILENCE, force DAC output to silence */
      SOC_SINGLE("Silence Detector Switch", UDA1380_MIXER, 6, 1, 0),          /* SDET_ON */
      SOC_ENUM("Silence Detector Setting", uda1380_sdet_enum),          /* SD_VALUE */
      SOC_ENUM("Oversampling Input", uda1380_os_enum),                  /* OS */
      SOC_DOUBLE_S8_TLV("ADC Capture Volume", UDA1380_DEC, -128, 48, dec_tlv),      /* ML_DEC, MR_DEC */
/**/  SOC_SINGLE("ADC Capture Switch", UDA1380_PGA, 15, 1, 1),          /* MT_ADC */
      SOC_DOUBLE_TLV("Line Capture Volume", UDA1380_PGA, 0, 8, 8, 0, pga_tlv), /* PGA_GAINCTRLL, PGA_GAINCTRLR */
      SOC_SINGLE("ADC Polarity inverting Switch", UDA1380_ADC, 12, 1, 0),     /* ADCPOL_INV */
      SOC_SINGLE_TLV("Mic Capture Volume", UDA1380_ADC, 8, 15, 0, vga_tlv),   /* VGA_CTRL */
      SOC_SINGLE("DC Filter Bypass Switch", UDA1380_ADC, 1, 1, 0),            /* SKIP_DCFIL (before decimator) */
      SOC_SINGLE("DC Filter Enable Switch", UDA1380_ADC, 0, 1, 0),            /* EN_DCFIL (at output of decimator) */
      SOC_SINGLE("AGC Timing", UDA1380_AGC, 8, 7, 0),             /* TODO: enum, see table 62 */
      SOC_SINGLE("AGC Target level", UDA1380_AGC, 2, 3, 1),             /* AGC_LEVEL */
      /* -5.5, -8, -11.5, -14 dBFS */
      SOC_SINGLE("AGC Switch", UDA1380_AGC, 0, 1, 0),
};

/* add non dapm controls */
static int uda1380_add_controls(struct snd_soc_codec *codec)
{
      int err, i;

      for (i = 0; i < ARRAY_SIZE(uda1380_snd_controls); i++) {
            err = snd_ctl_add(codec->card,
                  snd_soc_cnew(&uda1380_snd_controls[i], codec, NULL));
            if (err < 0)
                  return err;
      }

      return 0;
}

/* Input mux */
static const struct snd_kcontrol_new uda1380_input_mux_control =
      SOC_DAPM_ENUM("Route", uda1380_input_sel_enum);

/* Output mux */
static const struct snd_kcontrol_new uda1380_output_mux_control =
      SOC_DAPM_ENUM("Route", uda1380_output_sel_enum);

/* Capture mux */
static const struct snd_kcontrol_new uda1380_capture_mux_control =
      SOC_DAPM_ENUM("Route", uda1380_capture_sel_enum);


static const struct snd_soc_dapm_widget uda1380_dapm_widgets[] = {
      SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
            &uda1380_input_mux_control),
      SND_SOC_DAPM_MUX("Output Mux", SND_SOC_NOPM, 0, 0,
            &uda1380_output_mux_control),
      SND_SOC_DAPM_MUX("Capture Mux", SND_SOC_NOPM, 0, 0,
            &uda1380_capture_mux_control),
      SND_SOC_DAPM_PGA("Left PGA", UDA1380_PM, 3, 0, NULL, 0),
      SND_SOC_DAPM_PGA("Right PGA", UDA1380_PM, 1, 0, NULL, 0),
      SND_SOC_DAPM_PGA("Mic LNA", UDA1380_PM, 4, 0, NULL, 0),
      SND_SOC_DAPM_ADC("Left ADC", "Left Capture", UDA1380_PM, 2, 0),
      SND_SOC_DAPM_ADC("Right ADC", "Right Capture", UDA1380_PM, 0, 0),
      SND_SOC_DAPM_INPUT("VINM"),
      SND_SOC_DAPM_INPUT("VINL"),
      SND_SOC_DAPM_INPUT("VINR"),
      SND_SOC_DAPM_MIXER("Analog Mixer", UDA1380_PM, 6, 0, NULL, 0),
      SND_SOC_DAPM_OUTPUT("VOUTLHP"),
      SND_SOC_DAPM_OUTPUT("VOUTRHP"),
      SND_SOC_DAPM_OUTPUT("VOUTL"),
      SND_SOC_DAPM_OUTPUT("VOUTR"),
      SND_SOC_DAPM_DAC("DAC", "Playback", UDA1380_PM, 10, 0),
      SND_SOC_DAPM_PGA("HeadPhone Driver", UDA1380_PM, 13, 0, NULL, 0),
};

static const struct snd_soc_dapm_route audio_map[] = {

      /* output mux */
      {"HeadPhone Driver", NULL, "Output Mux"},
      {"VOUTR", NULL, "Output Mux"},
      {"VOUTL", NULL, "Output Mux"},

      {"Analog Mixer", NULL, "VINR"},
      {"Analog Mixer", NULL, "VINL"},
      {"Analog Mixer", NULL, "DAC"},

      {"Output Mux", "DAC", "DAC"},
      {"Output Mux", "Analog Mixer", "Analog Mixer"},

      /* {"DAC", "Digital Mixer", "I2S" } */

      /* headphone driver */
      {"VOUTLHP", NULL, "HeadPhone Driver"},
      {"VOUTRHP", NULL, "HeadPhone Driver"},

      /* input mux */
      {"Left ADC", NULL, "Input Mux"},
      {"Input Mux", "Mic", "Mic LNA"},
      {"Input Mux", "Mic + Line R", "Mic LNA"},
      {"Input Mux", "Line L", "Left PGA"},
      {"Input Mux", "Line", "Left PGA"},

      /* right input */
      {"Right ADC", "Mic + Line R", "Right PGA"},
      {"Right ADC", "Line", "Right PGA"},

      /* inputs */
      {"Mic LNA", NULL, "VINM"},
      {"Left PGA", NULL, "VINL"},
      {"Right PGA", NULL, "VINR"},
};

static int uda1380_add_widgets(struct snd_soc_codec *codec)
{
      snd_soc_dapm_new_controls(codec, uda1380_dapm_widgets,
                          ARRAY_SIZE(uda1380_dapm_widgets));

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

      snd_soc_dapm_new_widgets(codec);
      return 0;
}

static int uda1380_set_dai_fmt(struct snd_soc_dai *codec_dai,
            unsigned int fmt)
{
      struct snd_soc_codec *codec = codec_dai->codec;
      int iface;

      /* set up DAI based upon fmt */
      iface = uda1380_read_reg_cache(codec, UDA1380_IFACE);
      iface &= ~(R01_SFORI_MASK | R01_SIM | R01_SFORO_MASK);

      /* FIXME: how to select I2S for DATAO and MSB for DATAI correctly? */
      switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
      case SND_SOC_DAIFMT_I2S:
            iface |= R01_SFORI_I2S | R01_SFORO_I2S;
            break;
      case SND_SOC_DAIFMT_LSB:
            iface |= R01_SFORI_LSB16 | R01_SFORO_I2S;
            break;
      case SND_SOC_DAIFMT_MSB:
            iface |= R01_SFORI_MSB | R01_SFORO_I2S;
      }

      if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) == SND_SOC_DAIFMT_CBM_CFM)
            iface |= R01_SIM;

      uda1380_write(codec, UDA1380_IFACE, iface);

      return 0;
}

/*
 * Flush reg cache
 * We can only write the interpolator and decimator registers
 * when the DAI is being clocked by the CPU DAI. It's up to the
 * machine and cpu DAI driver to do this before we are called.
 */
static int uda1380_pcm_prepare(struct snd_pcm_substream *substream)
{
      struct snd_soc_pcm_runtime *rtd = substream->private_data;
      struct snd_soc_device *socdev = rtd->socdev;
      struct snd_soc_codec *codec = socdev->codec;
      int reg, reg_start, reg_end, clk;

      if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
            reg_start = UDA1380_MVOL;
            reg_end = UDA1380_MIXER;
      } else {
            reg_start = UDA1380_DEC;
            reg_end = UDA1380_AGC;
      }

      /* FIXME disable DAC_CLK */
      clk = uda1380_read_reg_cache(codec, UDA1380_CLK);
      uda1380_write(codec, UDA1380_CLK, clk & ~R00_DAC_CLK);

      for (reg = reg_start; reg <= reg_end; reg++) {
            pr_debug("uda1380: flush reg %x val %x:", reg,
                        uda1380_read_reg_cache(codec, reg));
            uda1380_write(codec, reg, uda1380_read_reg_cache(codec, reg));
      }

      /* FIXME enable DAC_CLK */
      uda1380_write(codec, UDA1380_CLK, clk | R00_DAC_CLK);

      return 0;
}

static int uda1380_pcm_hw_params(struct snd_pcm_substream *substream,
      struct snd_pcm_hw_params *params)
{
      struct snd_soc_pcm_runtime *rtd = substream->private_data;
      struct snd_soc_device *socdev = rtd->socdev;
      struct snd_soc_codec *codec = socdev->codec;
      u16 clk = uda1380_read_reg_cache(codec, UDA1380_CLK);

      /* set WSPLL power and divider if running from this clock */
      if (clk & R00_DAC_CLK) {
            int rate = params_rate(params);
            u16 pm = uda1380_read_reg_cache(codec, UDA1380_PM);
            clk &= ~0x3; /* clear SEL_LOOP_DIV */
            switch (rate) {
            case 6250 ... 12500:
                  clk |= 0x0;
                  break;
            case 12501 ... 25000:
                  clk |= 0x1;
                  break;
            case 25001 ... 50000:
                  clk |= 0x2;
                  break;
            case 50001 ... 100000:
                  clk |= 0x3;
                  break;
            }
            uda1380_write(codec, UDA1380_PM, R02_PON_PLL | pm);
      }

      if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
            clk |= R00_EN_DAC | R00_EN_INT;
      else
            clk |= R00_EN_ADC | R00_EN_DEC;

      uda1380_write(codec, UDA1380_CLK, clk);
      return 0;
}

static void uda1380_pcm_shutdown(struct snd_pcm_substream *substream)
{
      struct snd_soc_pcm_runtime *rtd = substream->private_data;
      struct snd_soc_device *socdev = rtd->socdev;
      struct snd_soc_codec *codec = socdev->codec;
      u16 clk = uda1380_read_reg_cache(codec, UDA1380_CLK);

      /* shut down WSPLL power if running from this clock */
      if (clk & R00_DAC_CLK) {
            u16 pm = uda1380_read_reg_cache(codec, UDA1380_PM);
            uda1380_write(codec, UDA1380_PM, ~R02_PON_PLL & pm);
      }

      if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
            clk &= ~(R00_EN_DAC | R00_EN_INT);
      else
            clk &= ~(R00_EN_ADC | R00_EN_DEC);

      uda1380_write(codec, UDA1380_CLK, clk);
}

static int uda1380_mute(struct snd_soc_dai *codec_dai, int mute)
{
      struct snd_soc_codec *codec = codec_dai->codec;
      u16 mute_reg = uda1380_read_reg_cache(codec, UDA1380_DEEMP) & ~R13_MTM;

      /* FIXME: mute(codec,0) is called when the magician clock is already
       * set to WSPLL, but for some unknown reason writing to interpolator
       * registers works only when clocked by SYSCLK */
      u16 clk = uda1380_read_reg_cache(codec, UDA1380_CLK);
      uda1380_write(codec, UDA1380_CLK, ~R00_DAC_CLK & clk);
      if (mute)
            uda1380_write(codec, UDA1380_DEEMP, mute_reg | R13_MTM);
      else
            uda1380_write(codec, UDA1380_DEEMP, mute_reg);
      uda1380_write(codec, UDA1380_CLK, clk);
      return 0;
}

static int uda1380_set_bias_level(struct snd_soc_codec *codec,
      enum snd_soc_bias_level level)
{
      int pm = uda1380_read_reg_cache(codec, UDA1380_PM);

      switch (level) {
      case SND_SOC_BIAS_ON:
      case SND_SOC_BIAS_PREPARE:
            uda1380_write(codec, UDA1380_PM, R02_PON_BIAS | pm);
            break;
      case SND_SOC_BIAS_STANDBY:
            uda1380_write(codec, UDA1380_PM, R02_PON_BIAS);
            break;
      case SND_SOC_BIAS_OFF:
            uda1380_write(codec, UDA1380_PM, 0x0);
            break;
      }
      codec->bias_level = level;
      return 0;
}

#define UDA1380_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)

struct snd_soc_dai uda1380_dai[] = {
{
      .name = "UDA1380",
      .playback = {
            .stream_name = "Playback",
            .channels_min = 1,
            .channels_max = 2,
            .rates = UDA1380_RATES,
            .formats = SNDRV_PCM_FMTBIT_S16_LE,},
      .capture = {
            .stream_name = "Capture",
            .channels_min = 1,
            .channels_max = 2,
            .rates = UDA1380_RATES,
            .formats = SNDRV_PCM_FMTBIT_S16_LE,},
      .ops = {
            .hw_params = uda1380_pcm_hw_params,
            .shutdown = uda1380_pcm_shutdown,
            .prepare = uda1380_pcm_prepare,
      },
      .dai_ops = {
            .digital_mute = uda1380_mute,
            .set_fmt = uda1380_set_dai_fmt,
      },
},
{ /* playback only - dual interface */
      .name = "UDA1380",
      .playback = {
            .stream_name = "Playback",
            .channels_min = 1,
            .channels_max = 2,
            .rates = UDA1380_RATES,
            .formats = SNDRV_PCM_FMTBIT_S16_LE,
      },
      .ops = {
            .hw_params = uda1380_pcm_hw_params,
            .shutdown = uda1380_pcm_shutdown,
            .prepare = uda1380_pcm_prepare,
      },
      .dai_ops = {
            .digital_mute = uda1380_mute,
            .set_fmt = uda1380_set_dai_fmt,
      },
},
{ /* capture only - dual interface*/
      .name = "UDA1380",
      .capture = {
            .stream_name = "Capture",
            .channels_min = 1,
            .channels_max = 2,
            .rates = UDA1380_RATES,
            .formats = SNDRV_PCM_FMTBIT_S16_LE,
      },
      .ops = {
            .hw_params = uda1380_pcm_hw_params,
            .shutdown = uda1380_pcm_shutdown,
            .prepare = uda1380_pcm_prepare,
      },
      .dai_ops = {
            .set_fmt = uda1380_set_dai_fmt,
      },
},
};
EXPORT_SYMBOL_GPL(uda1380_dai);

static int uda1380_suspend(struct platform_device *pdev, pm_message_t state)
{
      struct snd_soc_device *socdev = platform_get_drvdata(pdev);
      struct snd_soc_codec *codec = socdev->codec;

      uda1380_set_bias_level(codec, SND_SOC_BIAS_OFF);
      return 0;
}

static int uda1380_resume(struct platform_device *pdev)
{
      struct snd_soc_device *socdev = platform_get_drvdata(pdev);
      struct snd_soc_codec *codec = socdev->codec;
      int i;
      u8 data[2];
      u16 *cache = codec->reg_cache;

      /* Sync reg_cache with the hardware */
      for (i = 0; i < ARRAY_SIZE(uda1380_reg); i++) {
            data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
            data[1] = cache[i] & 0x00ff;
            codec->hw_write(codec->control_data, data, 2);
      }
      uda1380_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
      uda1380_set_bias_level(codec, codec->suspend_bias_level);
      return 0;
}

/*
 * initialise the UDA1380 driver
 * register mixer and dsp interfaces with the kernel
 */
static int uda1380_init(struct snd_soc_device *socdev, int dac_clk)
{
      struct snd_soc_codec *codec = socdev->codec;
      int ret = 0;

      codec->name = "UDA1380";
      codec->owner = THIS_MODULE;
      codec->read = uda1380_read_reg_cache;
      codec->write = uda1380_write;
      codec->set_bias_level = uda1380_set_bias_level;
      codec->dai = uda1380_dai;
      codec->num_dai = ARRAY_SIZE(uda1380_dai);
      codec->reg_cache = kmemdup(uda1380_reg, sizeof(uda1380_reg),
                           GFP_KERNEL);
      if (codec->reg_cache == NULL)
            return -ENOMEM;
      codec->reg_cache_size = ARRAY_SIZE(uda1380_reg);
      codec->reg_cache_step = 1;
      uda1380_reset(codec);

      /* register pcms */
      ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
      if (ret < 0) {
            pr_err("uda1380: failed to create pcms\n");
            goto pcm_err;
      }

      /* power on device */
      uda1380_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
      /* set clock input */
      switch (dac_clk) {
      case UDA1380_DAC_CLK_SYSCLK:
            uda1380_write(codec, UDA1380_CLK, 0);
            break;
      case UDA1380_DAC_CLK_WSPLL:
            uda1380_write(codec, UDA1380_CLK, R00_DAC_CLK);
            break;
      }

      /* uda1380 init */
      uda1380_add_controls(codec);
      uda1380_add_widgets(codec);
      ret = snd_soc_register_card(socdev);
      if (ret < 0) {
            pr_err("uda1380: failed to register card\n");
            goto card_err;
      }

      return ret;

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

static struct snd_soc_device *uda1380_socdev;

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

#define I2C_DRIVERID_UDA1380 0xfefe /* liam -  need a proper id */

static unsigned short normal_i2c[] = { 0, I2C_CLIENT_END };

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

static struct i2c_driver uda1380_i2c_driver;
static struct i2c_client client_template;

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

static int uda1380_codec_probe(struct i2c_adapter *adap, int addr, int kind)
{
      struct snd_soc_device *socdev = uda1380_socdev;
      struct uda1380_setup_data *setup = socdev->codec_data;
      struct snd_soc_codec *codec = socdev->codec;
      struct i2c_client *i2c;
      int ret;

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

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

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

      ret = i2c_attach_client(i2c);
      if (ret < 0) {
            pr_err("uda1380: failed to attach codec at addr %x\n", addr);
            goto err;
      }

      ret = uda1380_init(socdev, setup->dac_clk);
      if (ret < 0) {
            pr_err("uda1380: failed to initialise UDA1380\n");
            goto err;
      }
      return ret;

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

static int uda1380_i2c_detach(struct i2c_client *client)
{
      struct snd_soc_codec *codec = i2c_get_clientdata(client);
      i2c_detach_client(client);
      kfree(codec->reg_cache);
      kfree(client);
      return 0;
}

static int uda1380_i2c_attach(struct i2c_adapter *adap)
{
      return i2c_probe(adap, &addr_data, uda1380_codec_probe);
}

static struct i2c_driver uda1380_i2c_driver = {
      .driver = {
            .name =  "UDA1380 I2C Codec",
            .owner = THIS_MODULE,
      },
      .id =             I2C_DRIVERID_UDA1380,
      .attach_adapter = uda1380_i2c_attach,
      .detach_client =  uda1380_i2c_detach,
      .command =        NULL,
};

static struct i2c_client client_template = {
      .name =   "UDA1380",
      .driver = &uda1380_i2c_driver,
};
#endif

static int uda1380_probe(struct platform_device *pdev)
{
      struct snd_soc_device *socdev = platform_get_drvdata(pdev);
      struct uda1380_setup_data *setup;
      struct snd_soc_codec *codec;
      int ret = 0;

      pr_info("UDA1380 Audio Codec %s", UDA1380_VERSION);

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

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

      uda1380_socdev = socdev;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
      if (setup->i2c_address) {
            normal_i2c[0] = setup->i2c_address;
            codec->hw_write = (hw_write_t)i2c_master_send;
            ret = i2c_add_driver(&uda1380_i2c_driver);
            if (ret != 0)
                  printk(KERN_ERR "can't add i2c driver");
      }
#else
      /* Add other interfaces here */
#endif
      return ret;
}

/* power down chip */
static int uda1380_remove(struct platform_device *pdev)
{
      struct snd_soc_device *socdev = platform_get_drvdata(pdev);
      struct snd_soc_codec *codec = socdev->codec;

      if (codec->control_data)
            uda1380_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_del_driver(&uda1380_i2c_driver);
#endif
      kfree(codec);

      return 0;
}

struct snd_soc_codec_device soc_codec_dev_uda1380 = {
      .probe =    uda1380_probe,
      .remove =   uda1380_remove,
      .suspend =  uda1380_suspend,
      .resume =   uda1380_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_uda1380);

MODULE_AUTHOR("Giorgio Padrin");
MODULE_DESCRIPTION("Audio support for codec Philips UDA1380");
MODULE_LICENSE("GPL");

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