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ad193x.c

/*
 * AD193X Audio Codec driver supporting AD1936/7/8/9
 *
 * Copyright 2010 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include "ad193x.h"

/* codec private data */
00025 struct ad193x_priv {
      enum snd_soc_control_type bus_type;
      void *control_data;
      int sysclk;
};

/* ad193x register cache & default register settings */
static const u8 ad193x_reg[AD193X_NUM_REGS] = {
      0, 0, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0,
};

/*
 * AD193X volume/mute/de-emphasis etc. controls
 */
static const char *ad193x_deemp[] = {"None", "48kHz", "44.1kHz", "32kHz"};

static const struct soc_enum ad193x_deemp_enum =
      SOC_ENUM_SINGLE(AD193X_DAC_CTRL2, 1, 4, ad193x_deemp);

static const struct snd_kcontrol_new ad193x_snd_controls[] = {
      /* DAC volume control */
      SOC_DOUBLE_R("DAC1 Volume", AD193X_DAC_L1_VOL,
                  AD193X_DAC_R1_VOL, 0, 0xFF, 1),
      SOC_DOUBLE_R("DAC2 Volume", AD193X_DAC_L2_VOL,
                  AD193X_DAC_R2_VOL, 0, 0xFF, 1),
      SOC_DOUBLE_R("DAC3 Volume", AD193X_DAC_L3_VOL,
                  AD193X_DAC_R3_VOL, 0, 0xFF, 1),
      SOC_DOUBLE_R("DAC4 Volume", AD193X_DAC_L4_VOL,
                  AD193X_DAC_R4_VOL, 0, 0xFF, 1),

      /* ADC switch control */
      SOC_DOUBLE("ADC1 Switch", AD193X_ADC_CTRL0, AD193X_ADCL1_MUTE,
            AD193X_ADCR1_MUTE, 1, 1),
      SOC_DOUBLE("ADC2 Switch", AD193X_ADC_CTRL0, AD193X_ADCL2_MUTE,
            AD193X_ADCR2_MUTE, 1, 1),

      /* DAC switch control */
      SOC_DOUBLE("DAC1 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL1_MUTE,
            AD193X_DACR1_MUTE, 1, 1),
      SOC_DOUBLE("DAC2 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL2_MUTE,
            AD193X_DACR2_MUTE, 1, 1),
      SOC_DOUBLE("DAC3 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL3_MUTE,
            AD193X_DACR3_MUTE, 1, 1),
      SOC_DOUBLE("DAC4 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL4_MUTE,
            AD193X_DACR4_MUTE, 1, 1),

      /* ADC high-pass filter */
      SOC_SINGLE("ADC High Pass Filter Switch", AD193X_ADC_CTRL0,
                  AD193X_ADC_HIGHPASS_FILTER, 1, 0),

      /* DAC de-emphasis */
      SOC_ENUM("Playback Deemphasis", ad193x_deemp_enum),
};

static const struct snd_soc_dapm_widget ad193x_dapm_widgets[] = {
      SND_SOC_DAPM_DAC("DAC", "Playback", AD193X_DAC_CTRL0, 0, 1),
      SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
      SND_SOC_DAPM_SUPPLY("PLL_PWR", AD193X_PLL_CLK_CTRL0, 0, 1, NULL, 0),
      SND_SOC_DAPM_SUPPLY("ADC_PWR", AD193X_ADC_CTRL0, 0, 1, NULL, 0),
      SND_SOC_DAPM_OUTPUT("DAC1OUT"),
      SND_SOC_DAPM_OUTPUT("DAC2OUT"),
      SND_SOC_DAPM_OUTPUT("DAC3OUT"),
      SND_SOC_DAPM_OUTPUT("DAC4OUT"),
      SND_SOC_DAPM_INPUT("ADC1IN"),
      SND_SOC_DAPM_INPUT("ADC2IN"),
};

static const struct snd_soc_dapm_route audio_paths[] = {
      { "DAC", NULL, "PLL_PWR" },
      { "ADC", NULL, "PLL_PWR" },
      { "DAC", NULL, "ADC_PWR" },
      { "ADC", NULL, "ADC_PWR" },
      { "DAC1OUT", "DAC1 Switch", "DAC" },
      { "DAC2OUT", "DAC2 Switch", "DAC" },
      { "DAC3OUT", "DAC3 Switch", "DAC" },
      { "DAC4OUT", "DAC4 Switch", "DAC" },
      { "ADC", "ADC1 Switch", "ADC1IN" },
      { "ADC", "ADC2 Switch", "ADC2IN" },
};

/*
 * DAI ops entries
 */

static int ad193x_mute(struct snd_soc_dai *dai, int mute)
{
      struct snd_soc_codec *codec = dai->codec;
      int reg;

      reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
      reg = (mute > 0) ? reg | AD193X_DAC_MASTER_MUTE : reg &
            (~AD193X_DAC_MASTER_MUTE);
      snd_soc_write(codec, AD193X_DAC_CTRL2, reg);

      return 0;
}

static int ad193x_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
                         unsigned int rx_mask, int slots, int width)
{
      struct snd_soc_codec *codec = dai->codec;
      int dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);
      int adc_reg = snd_soc_read(codec, AD193X_ADC_CTRL2);

      dac_reg &= ~AD193X_DAC_CHAN_MASK;
      adc_reg &= ~AD193X_ADC_CHAN_MASK;

      switch (slots) {
      case 2:
            dac_reg |= AD193X_DAC_2_CHANNELS << AD193X_DAC_CHAN_SHFT;
            adc_reg |= AD193X_ADC_2_CHANNELS << AD193X_ADC_CHAN_SHFT;
            break;
      case 4:
            dac_reg |= AD193X_DAC_4_CHANNELS << AD193X_DAC_CHAN_SHFT;
            adc_reg |= AD193X_ADC_4_CHANNELS << AD193X_ADC_CHAN_SHFT;
            break;
      case 8:
            dac_reg |= AD193X_DAC_8_CHANNELS << AD193X_DAC_CHAN_SHFT;
            adc_reg |= AD193X_ADC_8_CHANNELS << AD193X_ADC_CHAN_SHFT;
            break;
      case 16:
            dac_reg |= AD193X_DAC_16_CHANNELS << AD193X_DAC_CHAN_SHFT;
            adc_reg |= AD193X_ADC_16_CHANNELS << AD193X_ADC_CHAN_SHFT;
            break;
      default:
            return -EINVAL;
      }

      snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);
      snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg);

      return 0;
}

static int ad193x_set_dai_fmt(struct snd_soc_dai *codec_dai,
            unsigned int fmt)
{
      struct snd_soc_codec *codec = codec_dai->codec;
      int adc_reg1, adc_reg2, dac_reg;

      adc_reg1 = snd_soc_read(codec, AD193X_ADC_CTRL1);
      adc_reg2 = snd_soc_read(codec, AD193X_ADC_CTRL2);
      dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);

      /* At present, the driver only support AUX ADC mode(SND_SOC_DAIFMT_I2S
       * with TDM) and ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A)
       */
      switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
      case SND_SOC_DAIFMT_I2S:
            adc_reg1 &= ~AD193X_ADC_SERFMT_MASK;
            adc_reg1 |= AD193X_ADC_SERFMT_TDM;
            break;
      case SND_SOC_DAIFMT_DSP_A:
            adc_reg1 &= ~AD193X_ADC_SERFMT_MASK;
            adc_reg1 |= AD193X_ADC_SERFMT_AUX;
            break;
      default:
            return -EINVAL;
      }

      switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
      case SND_SOC_DAIFMT_NB_NF: /* normal bit clock + frame */
            adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
            adc_reg2 &= ~AD193X_ADC_BCLK_INV;
            dac_reg &= ~AD193X_DAC_LEFT_HIGH;
            dac_reg &= ~AD193X_DAC_BCLK_INV;
            break;
      case SND_SOC_DAIFMT_NB_IF: /* normal bclk + invert frm */
            adc_reg2 |= AD193X_ADC_LEFT_HIGH;
            adc_reg2 &= ~AD193X_ADC_BCLK_INV;
            dac_reg |= AD193X_DAC_LEFT_HIGH;
            dac_reg &= ~AD193X_DAC_BCLK_INV;
            break;
      case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal frm */
            adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
            adc_reg2 |= AD193X_ADC_BCLK_INV;
            dac_reg &= ~AD193X_DAC_LEFT_HIGH;
            dac_reg |= AD193X_DAC_BCLK_INV;
            break;

      case SND_SOC_DAIFMT_IB_IF: /* invert bclk + frm */
            adc_reg2 |= AD193X_ADC_LEFT_HIGH;
            adc_reg2 |= AD193X_ADC_BCLK_INV;
            dac_reg |= AD193X_DAC_LEFT_HIGH;
            dac_reg |= AD193X_DAC_BCLK_INV;
            break;
      default:
            return -EINVAL;
      }

      switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
      case SND_SOC_DAIFMT_CBM_CFM: /* codec clk & frm master */
            adc_reg2 |= AD193X_ADC_LCR_MASTER;
            adc_reg2 |= AD193X_ADC_BCLK_MASTER;
            dac_reg |= AD193X_DAC_LCR_MASTER;
            dac_reg |= AD193X_DAC_BCLK_MASTER;
            break;
      case SND_SOC_DAIFMT_CBS_CFM: /* codec clk slave & frm master */
            adc_reg2 |= AD193X_ADC_LCR_MASTER;
            adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
            dac_reg |= AD193X_DAC_LCR_MASTER;
            dac_reg &= ~AD193X_DAC_BCLK_MASTER;
            break;
      case SND_SOC_DAIFMT_CBM_CFS: /* codec clk master & frame slave */
            adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
            adc_reg2 |= AD193X_ADC_BCLK_MASTER;
            dac_reg &= ~AD193X_DAC_LCR_MASTER;
            dac_reg |= AD193X_DAC_BCLK_MASTER;
            break;
      case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */
            adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
            adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
            dac_reg &= ~AD193X_DAC_LCR_MASTER;
            dac_reg &= ~AD193X_DAC_BCLK_MASTER;
            break;
      default:
            return -EINVAL;
      }

      snd_soc_write(codec, AD193X_ADC_CTRL1, adc_reg1);
      snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg2);
      snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);

      return 0;
}

static int ad193x_set_dai_sysclk(struct snd_soc_dai *codec_dai,
            int clk_id, unsigned int freq, int dir)
{
      struct snd_soc_codec *codec = codec_dai->codec;
      struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
      switch (freq) {
      case 12288000:
      case 18432000:
      case 24576000:
      case 36864000:
            ad193x->sysclk = freq;
            return 0;
      }
      return -EINVAL;
}

static int ad193x_hw_params(struct snd_pcm_substream *substream,
            struct snd_pcm_hw_params *params,
            struct snd_soc_dai *dai)
{
      int word_len = 0, reg = 0, master_rate = 0;

      struct snd_soc_pcm_runtime *rtd = substream->private_data;
      struct snd_soc_codec *codec = rtd->codec;
      struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);

      /* bit size */
      switch (params_format(params)) {
      case SNDRV_PCM_FORMAT_S16_LE:
            word_len = 3;
            break;
      case SNDRV_PCM_FORMAT_S20_3LE:
            word_len = 1;
            break;
      case SNDRV_PCM_FORMAT_S24_LE:
      case SNDRV_PCM_FORMAT_S32_LE:
            word_len = 0;
            break;
      }

      switch (ad193x->sysclk) {
      case 12288000:
            master_rate = AD193X_PLL_INPUT_256;
            break;
      case 18432000:
            master_rate = AD193X_PLL_INPUT_384;
            break;
      case 24576000:
            master_rate = AD193X_PLL_INPUT_512;
            break;
      case 36864000:
            master_rate = AD193X_PLL_INPUT_768;
            break;
      }

      reg = snd_soc_read(codec, AD193X_PLL_CLK_CTRL0);
      reg = (reg & AD193X_PLL_INPUT_MASK) | master_rate;
      snd_soc_write(codec, AD193X_PLL_CLK_CTRL0, reg);

      reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
      reg = (reg & (~AD193X_DAC_WORD_LEN_MASK)) | word_len;
      snd_soc_write(codec, AD193X_DAC_CTRL2, reg);

      reg = snd_soc_read(codec, AD193X_ADC_CTRL1);
      reg = (reg & (~AD193X_ADC_WORD_LEN_MASK)) | word_len;
      snd_soc_write(codec, AD193X_ADC_CTRL1, reg);

      return 0;
}

static struct snd_soc_dai_ops ad193x_dai_ops = {
      .hw_params = ad193x_hw_params,
      .digital_mute = ad193x_mute,
      .set_tdm_slot = ad193x_set_tdm_slot,
      .set_sysclk = ad193x_set_dai_sysclk,
      .set_fmt = ad193x_set_dai_fmt,
};

/* codec DAI instance */
static struct snd_soc_dai_driver ad193x_dai = {
      .name = "ad193x-hifi",
      .playback = {
            .stream_name = "Playback",
            .channels_min = 2,
            .channels_max = 8,
            .rates = SNDRV_PCM_RATE_48000,
            .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
                  SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
      },
      .capture = {
            .stream_name = "Capture",
            .channels_min = 2,
            .channels_max = 4,
            .rates = SNDRV_PCM_RATE_48000,
            .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
                  SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
      },
      .ops = &ad193x_dai_ops,
};

static int ad193x_probe(struct snd_soc_codec *codec)
{
      struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
      struct snd_soc_dapm_context *dapm = &codec->dapm;
      int ret;

      codec->control_data = ad193x->control_data;
      if (ad193x->bus_type == SND_SOC_I2C)
            ret = snd_soc_codec_set_cache_io(codec, 8, 8, ad193x->bus_type);
      else
            ret = snd_soc_codec_set_cache_io(codec, 16, 8, ad193x->bus_type);
      if (ret < 0) {
            dev_err(codec->dev, "failed to set cache I/O: %d\n",
                        ret);
            return ret;
      }

      /* default setting for ad193x */

      /* unmute dac channels */
      snd_soc_write(codec, AD193X_DAC_CHNL_MUTE, 0x0);
      /* de-emphasis: 48kHz, powedown dac */
      snd_soc_write(codec, AD193X_DAC_CTRL2, 0x1A);
      /* powerdown dac, dac in tdm mode */
      snd_soc_write(codec, AD193X_DAC_CTRL0, 0x41);
      /* high-pass filter enable */
      snd_soc_write(codec, AD193X_ADC_CTRL0, 0x3);
      /* sata delay=1, adc aux mode */
      snd_soc_write(codec, AD193X_ADC_CTRL1, 0x43);
      /* pll input: mclki/xi */
      snd_soc_write(codec, AD193X_PLL_CLK_CTRL0, 0x99); /* mclk=24.576Mhz: 0x9D; mclk=12.288Mhz: 0x99 */
      snd_soc_write(codec, AD193X_PLL_CLK_CTRL1, 0x04);

      snd_soc_add_controls(codec, ad193x_snd_controls,
                       ARRAY_SIZE(ad193x_snd_controls));
      snd_soc_dapm_new_controls(dapm, ad193x_dapm_widgets,
                          ARRAY_SIZE(ad193x_dapm_widgets));
      snd_soc_dapm_add_routes(dapm, audio_paths, ARRAY_SIZE(audio_paths));

      return ret;
}

static struct snd_soc_codec_driver soc_codec_dev_ad193x = {
      .probe =    ad193x_probe,
      .reg_cache_default = ad193x_reg,
      .reg_cache_size = AD193X_NUM_REGS,
      .reg_word_size = sizeof(u16),
};

#if defined(CONFIG_SPI_MASTER)
static int __devinit ad193x_spi_probe(struct spi_device *spi)
{
      struct ad193x_priv *ad193x;
      int ret;

      ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
      if (ad193x == NULL)
            return -ENOMEM;

      spi_set_drvdata(spi, ad193x);
      ad193x->control_data = spi;
      ad193x->bus_type = SND_SOC_SPI;

      ret = snd_soc_register_codec(&spi->dev,
                  &soc_codec_dev_ad193x, &ad193x_dai, 1);
      if (ret < 0)
            kfree(ad193x);
      return ret;
}

static int __devexit ad193x_spi_remove(struct spi_device *spi)
{
      snd_soc_unregister_codec(&spi->dev);
      kfree(spi_get_drvdata(spi));
      return 0;
}

static struct spi_driver ad193x_spi_driver = {
      .driver = {
            .name = "ad193x-codec",
            .owner      = THIS_MODULE,
      },
      .probe            = ad193x_spi_probe,
      .remove           = __devexit_p(ad193x_spi_remove),
};
#endif

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static const struct i2c_device_id ad193x_id[] = {
      { "ad1936", 0 },
      { "ad1937", 0 },
      { }
};
MODULE_DEVICE_TABLE(i2c, ad193x_id);

static int __devinit ad193x_i2c_probe(struct i2c_client *client,
            const struct i2c_device_id *id)
{
      struct ad193x_priv *ad193x;
      int ret;

      ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
      if (ad193x == NULL)
            return -ENOMEM;

      i2c_set_clientdata(client, ad193x);
      ad193x->control_data = client;
      ad193x->bus_type = SND_SOC_I2C;

      ret =  snd_soc_register_codec(&client->dev,
                  &soc_codec_dev_ad193x, &ad193x_dai, 1);
      if (ret < 0)
            kfree(ad193x);
      return ret;
}

static int __devexit ad193x_i2c_remove(struct i2c_client *client)
{
      snd_soc_unregister_codec(&client->dev);
      kfree(i2c_get_clientdata(client));
      return 0;
}

static struct i2c_driver ad193x_i2c_driver = {
      .driver = {
            .name = "ad193x-codec",
      },
      .probe    = ad193x_i2c_probe,
      .remove   = __devexit_p(ad193x_i2c_remove),
      .id_table = ad193x_id,
};
#endif

static int __init ad193x_modinit(void)
{
      int ret;

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
      ret =  i2c_add_driver(&ad193x_i2c_driver);
      if (ret != 0) {
            printk(KERN_ERR "Failed to register AD193X I2C driver: %d\n",
                        ret);
      }
#endif

#if defined(CONFIG_SPI_MASTER)
      ret = spi_register_driver(&ad193x_spi_driver);
      if (ret != 0) {
            printk(KERN_ERR "Failed to register AD193X SPI driver: %d\n",
                        ret);
      }
#endif
      return ret;
}
module_init(ad193x_modinit);

static void __exit ad193x_modexit(void)
{
#if defined(CONFIG_SPI_MASTER)
      spi_unregister_driver(&ad193x_spi_driver);
#endif

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
      i2c_del_driver(&ad193x_i2c_driver);
#endif
}
module_exit(ad193x_modexit);

MODULE_DESCRIPTION("ASoC ad193x driver");
MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
MODULE_LICENSE("GPL");

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