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smdk_wm8994.c

/*
 *  smdk_wm8994.c
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 */

#include "../codecs/wm8994.h"

 /*
  * Default CFG switch settings to use this driver:
  *   SMDKV310: CFG5-1000, CFG7-111111
  */

 /*
  * Configure audio route as :-
  * $ amixer sset 'DAC1' on,on
  * $ amixer sset 'Right Headphone Mux' 'DAC'
  * $ amixer sset 'Left Headphone Mux' 'DAC'
  * $ amixer sset 'DAC1R Mixer AIF1.1' on
  * $ amixer sset 'DAC1L Mixer AIF1.1' on
  * $ amixer sset 'IN2L' on
  * $ amixer sset 'IN2L PGA IN2LN' on
  * $ amixer sset 'MIXINL IN2L' on
  * $ amixer sset 'AIF1ADC1L Mixer ADC/DMIC' on
  * $ amixer sset 'IN2R' on
  * $ amixer sset 'IN2R PGA IN2RN' on
  * $ amixer sset 'MIXINR IN2R' on
  * $ amixer sset 'AIF1ADC1R Mixer ADC/DMIC' on
  */

/* SMDK has a 16.934MHZ crystal attached to WM8994 */
#define SMDK_WM8994_FREQ 16934000

static int smdk_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_dai *cpu_dai = rtd->cpu_dai;
      struct snd_soc_dai *codec_dai = rtd->codec_dai;
      unsigned int pll_out;
      int ret;

      /* AIF1CLK should be >=3MHz for optimal performance */
      if (params_rate(params) == 8000 || params_rate(params) == 11025)
            pll_out = params_rate(params) * 512;
      else
            pll_out = params_rate(params) * 256;

      ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
                               | SND_SOC_DAIFMT_NB_NF
                               | SND_SOC_DAIFMT_CBM_CFM);
      if (ret < 0)
            return ret;

      ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
                               | SND_SOC_DAIFMT_NB_NF
                               | SND_SOC_DAIFMT_CBM_CFM);
      if (ret < 0)
            return ret;

      ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
                              SMDK_WM8994_FREQ, pll_out);
      if (ret < 0)
            return ret;

      ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
                              pll_out, SND_SOC_CLOCK_IN);
      if (ret < 0)
            return ret;

      return 0;
}

/*
 * SMDK WM8994 DAI operations.
 */
static struct snd_soc_ops smdk_ops = {
      .hw_params = smdk_hw_params,
};

static int smdk_wm8994_init_paiftx(struct snd_soc_pcm_runtime *rtd)
{
      struct snd_soc_codec *codec = rtd->codec;
      struct snd_soc_dapm_context *dapm = &codec->dapm;

      /* HeadPhone */
      snd_soc_dapm_enable_pin(dapm, "HPOUT1R");
      snd_soc_dapm_enable_pin(dapm, "HPOUT1L");

      /* MicIn */
      snd_soc_dapm_enable_pin(dapm, "IN1LN");
      snd_soc_dapm_enable_pin(dapm, "IN1RN");

      /* LineIn */
      snd_soc_dapm_enable_pin(dapm, "IN2LN");
      snd_soc_dapm_enable_pin(dapm, "IN2RN");

      /* Other pins NC */
      snd_soc_dapm_nc_pin(dapm, "HPOUT2P");
      snd_soc_dapm_nc_pin(dapm, "HPOUT2N");
      snd_soc_dapm_nc_pin(dapm, "SPKOUTLN");
      snd_soc_dapm_nc_pin(dapm, "SPKOUTLP");
      snd_soc_dapm_nc_pin(dapm, "SPKOUTRP");
      snd_soc_dapm_nc_pin(dapm, "SPKOUTRN");
      snd_soc_dapm_nc_pin(dapm, "LINEOUT1N");
      snd_soc_dapm_nc_pin(dapm, "LINEOUT1P");
      snd_soc_dapm_nc_pin(dapm, "LINEOUT2N");
      snd_soc_dapm_nc_pin(dapm, "LINEOUT2P");
      snd_soc_dapm_nc_pin(dapm, "IN1LP");
      snd_soc_dapm_nc_pin(dapm, "IN2LP:VXRN");
      snd_soc_dapm_nc_pin(dapm, "IN1RP");
      snd_soc_dapm_nc_pin(dapm, "IN2RP:VXRP");

      snd_soc_dapm_sync(dapm);

      return 0;
}

static struct snd_soc_dai_link smdk_dai[] = {
      { /* Primary DAI i/f */
            .name = "WM8994 AIF1",
            .stream_name = "Pri_Dai",
            .cpu_dai_name = "samsung-i2s.0",
            .codec_dai_name = "wm8994-aif1",
            .platform_name = "samsung-audio",
            .codec_name = "wm8994-codec",
            .init = smdk_wm8994_init_paiftx,
            .ops = &smdk_ops,
      }, { /* Sec_Fifo Playback i/f */
            .name = "Sec_FIFO TX",
            .stream_name = "Sec_Dai",
            .cpu_dai_name = "samsung-i2s.4",
            .codec_dai_name = "wm8994-aif1",
            .platform_name = "samsung-audio",
            .codec_name = "wm8994-codec",
            .ops = &smdk_ops,
      },
};

static struct snd_soc_card smdk = {
      .name = "SMDK-I2S",
      .dai_link = smdk_dai,
      .num_links = ARRAY_SIZE(smdk_dai),
};

static struct platform_device *smdk_snd_device;

static int __init smdk_audio_init(void)
{
      int ret;

      smdk_snd_device = platform_device_alloc("soc-audio", -1);
      if (!smdk_snd_device)
            return -ENOMEM;

      platform_set_drvdata(smdk_snd_device, &smdk);

      ret = platform_device_add(smdk_snd_device);
      if (ret)
            platform_device_put(smdk_snd_device);

      return ret;
}
module_init(smdk_audio_init);

static void __exit smdk_audio_exit(void)
{
      platform_device_unregister(smdk_snd_device);
}
module_exit(smdk_audio_exit);

MODULE_DESCRIPTION("ALSA SoC SMDK WM8994");
MODULE_LICENSE("GPL");

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