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kirkwood-t5325.c

/*
 * kirkwood-t5325.c
 *
 * (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org>
 *
 *  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/module.h>
#include <linux/moduleparam.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <sound/soc.h>
#include <mach/kirkwood.h>
#include <plat/audio.h>
#include <asm/mach-types.h>
#include "../codecs/alc5623.h"

static int t5325_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 ret;
      unsigned int freq, fmt;

      fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS;
      ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
      if (ret < 0)
            return ret;

      ret = snd_soc_dai_set_fmt(codec_dai, fmt);
      if (ret < 0)
            return ret;

      freq = params_rate(params) * 256;

      return snd_soc_dai_set_sysclk(codec_dai, 0, freq, SND_SOC_CLOCK_IN);

}

static struct snd_soc_ops t5325_ops = {
      .hw_params = t5325_hw_params,
};

static const struct snd_soc_dapm_widget t5325_dapm_widgets[] = {
      SND_SOC_DAPM_HP("Headphone Jack", NULL),
      SND_SOC_DAPM_SPK("Speaker", NULL),
      SND_SOC_DAPM_MIC("Mic Jack", NULL),
};

static const struct snd_soc_dapm_route t5325_route[] = {
      { "Headphone Jack",     NULL, "HPL" },
      { "Headphone Jack",     NULL, "HPR" },

      {"Speaker",       NULL, "SPKOUT"},
      {"Speaker",       NULL, "SPKOUTN"},

      { "MIC1",         NULL, "Mic Jack" },
      { "MIC2",         NULL, "Mic Jack" },
};

static int t5325_dai_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, t5325_dapm_widgets,
                        ARRAY_SIZE(t5325_dapm_widgets));

      snd_soc_dapm_add_routes(dapm, t5325_route, ARRAY_SIZE(t5325_route));

      snd_soc_dapm_enable_pin(dapm, "Mic Jack");
      snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
      snd_soc_dapm_enable_pin(dapm, "Speaker");

      snd_soc_dapm_sync(dapm);

      return 0;
}

static struct snd_soc_dai_link t5325_dai[] = {
{
      .name = "ALC5621",
      .stream_name = "ALC5621 HiFi",
      .cpu_dai_name = "kirkwood-i2s",
      .platform_name = "kirkwood-pcm-audio",
      .codec_dai_name = "alc5621-hifi",
      .codec_name = "alc562x-codec.0-001a",
      .ops = &t5325_ops,
      .init = t5325_dai_init,
},
};


static struct snd_soc_card t5325 = {
      .name = "t5325",
      .dai_link = t5325_dai,
      .num_links = ARRAY_SIZE(t5325_dai),
};

static struct platform_device *t5325_snd_device;

static int __init t5325_init(void)
{
      int ret;

      if (!machine_is_t5325())
            return 0;

      t5325_snd_device = platform_device_alloc("soc-audio", -1);
      if (!t5325_snd_device)
            return -ENOMEM;

      platform_set_drvdata(t5325_snd_device,
                  &t5325);

      ret = platform_device_add(t5325_snd_device);
      if (ret) {
            printk(KERN_ERR "%s: platform_device_add failed\n", __func__);
            platform_device_put(t5325_snd_device);
      }

      return ret;
}
module_init(t5325_init);

static void __exit t5325_exit(void)
{
      platform_device_unregister(t5325_snd_device);
}
module_exit(t5325_exit);

MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
MODULE_DESCRIPTION("ALSA SoC t5325 audio client");
MODULE_LICENSE("GPL");

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