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snappercl15.c

/*
 * snappercl15.c -- SoC audio for Bluewater Systems Snapper CL15 module
 *
 * Copyright (C) 2008 Bluewater Systems Ltd
 * Author: Ryan Mallon <ryan@bluewatersys.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 <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>

#include <asm/mach-types.h>
#include <mach/hardware.h>

#include "../codecs/tlv320aic23.h"
#include "ep93xx-pcm.h"

#define CODEC_CLOCK 5644800

static int snappercl15_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 *codec_dai = rtd->codec_dai;
      struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
      int err;

      err = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
                          SND_SOC_DAIFMT_NB_IF |
                          SND_SOC_DAIFMT_CBS_CFS);

      err = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | 
                          SND_SOC_DAIFMT_NB_IF |              
                          SND_SOC_DAIFMT_CBS_CFS);
      if (err)
            return err;

      err = snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, 
                             SND_SOC_CLOCK_IN);
      if (err)
            return err;

      err = snd_soc_dai_set_sysclk(cpu_dai, 0, CODEC_CLOCK, 
                             SND_SOC_CLOCK_OUT);
      if (err)
            return err;

      return 0;
}

static struct snd_soc_ops snappercl15_ops = {
      .hw_params  = snappercl15_hw_params,
};

static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
      SND_SOC_DAPM_HP("Headphone Jack", NULL),
      SND_SOC_DAPM_LINE("Line In", NULL),
      SND_SOC_DAPM_MIC("Mic Jack", NULL),
};

static const struct snd_soc_dapm_route audio_map[] = {
      {"Headphone Jack", NULL, "LHPOUT"},
      {"Headphone Jack", NULL, "RHPOUT"},

      {"LLINEIN", NULL, "Line In"},
      {"RLINEIN", NULL, "Line In"},

      {"MICIN", NULL, "Mic Jack"},
};

static int snappercl15_tlv320aic23_init(struct snd_soc_pcm_runtime *rtd)
{
      struct snd_soc_codec *codec = rtd->codec;
      struct snd_soc_dapm_context *dapm = &codec->dapm;

      snd_soc_dapm_new_controls(dapm, tlv320aic23_dapm_widgets,
                          ARRAY_SIZE(tlv320aic23_dapm_widgets));

      snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
      return 0;
}

static struct snd_soc_dai_link snappercl15_dai = {
      .name       = "tlv320aic23",
      .stream_name      = "AIC23",
      .cpu_dai_name     = "ep93xx-i2s",
      .codec_dai_name   = "tlv320aic23-hifi",
      .codec_name = "tlv320aic23-codec.0-001a",
      .platform_name    =  "ep93xx-pcm-audio",
      .init       = snappercl15_tlv320aic23_init,
      .ops        = &snappercl15_ops,
};

static struct snd_soc_card snd_soc_snappercl15 = {
      .name       = "Snapper CL15",
      .dai_link   = &snappercl15_dai,
      .num_links  = 1,
};

static struct platform_device *snappercl15_snd_device;

static int __init snappercl15_init(void)
{
      int ret;

      if (!machine_is_snapper_cl15())
            return -ENODEV;

      ret = ep93xx_i2s_acquire(EP93XX_SYSCON_DEVCFG_I2SONAC97,
                         EP93XX_SYSCON_I2SCLKDIV_ORIDE |
                         EP93XX_SYSCON_I2SCLKDIV_SPOL);
      if (ret)
            return ret;

      snappercl15_snd_device = platform_device_alloc("soc-audio", -1);
      if (!snappercl15_snd_device)
            return -ENOMEM;
      
      platform_set_drvdata(snappercl15_snd_device, &snd_soc_snappercl15);
      ret = platform_device_add(snappercl15_snd_device);
      if (ret)
            platform_device_put(snappercl15_snd_device);

      return ret;
}

static void __exit snappercl15_exit(void)
{
      platform_device_unregister(snappercl15_snd_device);
      ep93xx_i2s_release();
}

module_init(snappercl15_init);
module_exit(snappercl15_exit);

MODULE_AUTHOR("Ryan Mallon <ryan@bluewatersys.com>");
MODULE_DESCRIPTION("ALSA SoC Snapper CL15");
MODULE_LICENSE("GPL");


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