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smdk64xx_wm8580.c

/*
 *  smdk64xx_wm8580.c
 *
 *  Copyright (c) 2009 Samsung Electronics Co. Ltd
 *  Author: Jaswinder Singh <jassi.brar@samsung.com>
 *
 *  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 <linux/platform_device.h>
#include <linux/clk.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>

#include "../codecs/wm8580.h"
#include "s3c-dma.h"
#include "s3c64xx-i2s.h"

#define S3C64XX_I2S_V4 2

/* SMDK64XX has a 12MHZ crystal attached to WM8580 */
#define SMDK64XX_WM8580_FREQ 12000000

static int smdk64xx_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->dai->cpu_dai;
      struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
      unsigned int pll_out;
      int bfs, rfs, ret;

      switch (params_format(params)) {
      case SNDRV_PCM_FORMAT_U8:
      case SNDRV_PCM_FORMAT_S8:
            bfs = 16;
            break;
      case SNDRV_PCM_FORMAT_U16_LE:
      case SNDRV_PCM_FORMAT_S16_LE:
            bfs = 32;
            break;
      default:
            return -EINVAL;
      }

      /* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
       * This criterion can't be met if we request PLL output
       * as {8000x256, 64000x256, 11025x256}Hz.
       * As a wayout, we rather change rfs to a minimum value that
       * results in (params_rate(params) * rfs), and itself, acceptable
       * to both - the CODEC and the CPU.
       */
      switch (params_rate(params)) {
      case 16000:
      case 22050:
      case 32000:
      case 44100:
      case 48000:
      case 88200:
      case 96000:
            rfs = 256;
            break;
      case 64000:
            rfs = 384;
            break;
      case 8000:
      case 11025:
            rfs = 512;
            break;
      default:
            return -EINVAL;
      }
      pll_out = params_rate(params) * rfs;

      /* Set the Codec DAI configuration */
      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;

      /* Set the AP DAI configuration */
      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_sysclk(cpu_dai, S3C64XX_CLKSRC_CDCLK,
                              0, SND_SOC_CLOCK_IN);
      if (ret < 0)
            return ret;

      /* We use PCLK for basic ops in SoC-Slave mode */
      ret = snd_soc_dai_set_sysclk(cpu_dai, S3C64XX_CLKSRC_PCLK,
                              0, SND_SOC_CLOCK_IN);
      if (ret < 0)
            return ret;

      /* Set WM8580 to drive MCLK from its PLLA */
      ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
                              WM8580_CLKSRC_PLLA);
      if (ret < 0)
            return ret;

      /* Explicitly set WM8580-DAC to source from MCLK */
      ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_DAC_CLKSEL,
                              WM8580_CLKSRC_MCLK);
      if (ret < 0)
            return ret;

      ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
                              SMDK64XX_WM8580_FREQ, pll_out);
      if (ret < 0)
            return ret;

      ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_BCLK, bfs);
      if (ret < 0)
            return ret;

      ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_RCLK, rfs);
      if (ret < 0)
            return ret;

      return 0;
}

/*
 * SMDK64XX WM8580 DAI operations.
 */
static struct snd_soc_ops smdk64xx_ops = {
      .hw_params = smdk64xx_hw_params,
};

/* SMDK64xx Playback widgets */
static const struct snd_soc_dapm_widget wm8580_dapm_widgets_pbk[] = {
      SND_SOC_DAPM_HP("Front-L/R", NULL),
      SND_SOC_DAPM_HP("Center/Sub", NULL),
      SND_SOC_DAPM_HP("Rear-L/R", NULL),
};

/* SMDK64xx Capture widgets */
static const struct snd_soc_dapm_widget wm8580_dapm_widgets_cpt[] = {
      SND_SOC_DAPM_MIC("MicIn", NULL),
      SND_SOC_DAPM_LINE("LineIn", NULL),
};

/* SMDK-PAIFTX connections */
static const struct snd_soc_dapm_route audio_map_tx[] = {
      /* MicIn feeds AINL */
      {"AINL", NULL, "MicIn"},

      /* LineIn feeds AINL/R */
      {"AINL", NULL, "LineIn"},
      {"AINR", NULL, "LineIn"},
};

/* SMDK-PAIFRX connections */
static const struct snd_soc_dapm_route audio_map_rx[] = {
      /* Front Left/Right are fed VOUT1L/R */
      {"Front-L/R", NULL, "VOUT1L"},
      {"Front-L/R", NULL, "VOUT1R"},

      /* Center/Sub are fed VOUT2L/R */
      {"Center/Sub", NULL, "VOUT2L"},
      {"Center/Sub", NULL, "VOUT2R"},

      /* Rear Left/Right are fed VOUT3L/R */
      {"Rear-L/R", NULL, "VOUT3L"},
      {"Rear-L/R", NULL, "VOUT3R"},
};

static int smdk64xx_wm8580_init_paiftx(struct snd_soc_codec *codec)
{
      /* Add smdk64xx specific Capture widgets */
      snd_soc_dapm_new_controls(codec, wm8580_dapm_widgets_cpt,
                          ARRAY_SIZE(wm8580_dapm_widgets_cpt));

      /* Set up PAIFTX audio path */
      snd_soc_dapm_add_routes(codec, audio_map_tx, ARRAY_SIZE(audio_map_tx));

      /* Enabling the microphone requires the fitting of a 0R
       * resistor to connect the line from the microphone jack.
       */
      snd_soc_dapm_disable_pin(codec, "MicIn");

      /* signal a DAPM event */
      snd_soc_dapm_sync(codec);

      return 0;
}

static int smdk64xx_wm8580_init_paifrx(struct snd_soc_codec *codec)
{
      /* Add smdk64xx specific Playback widgets */
      snd_soc_dapm_new_controls(codec, wm8580_dapm_widgets_pbk,
                          ARRAY_SIZE(wm8580_dapm_widgets_pbk));

      /* Set up PAIFRX audio path */
      snd_soc_dapm_add_routes(codec, audio_map_rx, ARRAY_SIZE(audio_map_rx));

      /* signal a DAPM event */
      snd_soc_dapm_sync(codec);

      return 0;
}

static struct snd_soc_dai_link smdk64xx_dai[] = {
{ /* Primary Playback i/f */
      .name = "WM8580 PAIF RX",
      .stream_name = "Playback",
      .cpu_dai = &s3c64xx_i2s_dai[S3C64XX_I2S_V4],
      .codec_dai = &wm8580_dai[WM8580_DAI_PAIFRX],
      .init = smdk64xx_wm8580_init_paifrx,
      .ops = &smdk64xx_ops,
},
{ /* Primary Capture i/f */
      .name = "WM8580 PAIF TX",
      .stream_name = "Capture",
      .cpu_dai = &s3c64xx_i2s_dai[S3C64XX_I2S_V4],
      .codec_dai = &wm8580_dai[WM8580_DAI_PAIFTX],
      .init = smdk64xx_wm8580_init_paiftx,
      .ops = &smdk64xx_ops,
},
};

static struct snd_soc_card smdk64xx = {
      .name = "smdk64xx",
      .platform = &s3c24xx_soc_platform,
      .dai_link = smdk64xx_dai,
      .num_links = ARRAY_SIZE(smdk64xx_dai),
};

static struct snd_soc_device smdk64xx_snd_devdata = {
      .card = &smdk64xx,
      .codec_dev = &soc_codec_dev_wm8580,
};

static struct platform_device *smdk64xx_snd_device;

static int __init smdk64xx_audio_init(void)
{
      int ret;

      smdk64xx_snd_device = platform_device_alloc("soc-audio", -1);
      if (!smdk64xx_snd_device)
            return -ENOMEM;

      platform_set_drvdata(smdk64xx_snd_device, &smdk64xx_snd_devdata);
      smdk64xx_snd_devdata.dev = &smdk64xx_snd_device->dev;
      ret = platform_device_add(smdk64xx_snd_device);

      if (ret)
            platform_device_put(smdk64xx_snd_device);

      return ret;
}
module_init(smdk64xx_audio_init);

MODULE_AUTHOR("Jaswinder Singh, jassi.brar@samsung.com");
MODULE_DESCRIPTION("ALSA SoC SMDK64XX WM8580");
MODULE_LICENSE("GPL");

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