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kirkwood-openrd.c

/*
 * kirkwood-openrd.c
 *
 * (c) 2010 Arnaud Patard <apatard@mandriva.com>
 * (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/cs42l51.h"

static int openrd_client_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;

      switch (params_rate(params)) {
      default:
      case 44100:
            freq = 11289600;
            break;
      case 48000:
            freq = 12288000;
            break;
      case 96000:
            freq = 24576000;
            break;
      }

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

}

static struct snd_soc_ops openrd_client_ops = {
      .hw_params = openrd_client_hw_params,
};


static struct snd_soc_dai_link openrd_client_dai[] = {
{
      .name = "CS42L51",
      .stream_name = "CS42L51 HiFi",
      .cpu_dai_name = "kirkwood-i2s",
      .platform_name = "kirkwood-pcm-audio",
      .codec_dai_name = "cs42l51-hifi",
      .codec_name = "cs42l51-codec.0-004a",
      .ops = &openrd_client_ops,
},
};


static struct snd_soc_card openrd_client = {
      .name = "OpenRD Client",
      .dai_link = openrd_client_dai,
      .num_links = ARRAY_SIZE(openrd_client_dai),
};

static struct platform_device *openrd_client_snd_device;

static int __init openrd_client_init(void)
{
      int ret;

      if (!machine_is_openrd_client() && !machine_is_openrd_ultimate())
            return 0;

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

      platform_set_drvdata(openrd_client_snd_device,
                  &openrd_client);

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

      return ret;
}

static void __exit openrd_client_exit(void)
{
      platform_device_unregister(openrd_client_snd_device);
}

module_init(openrd_client_init);
module_exit(openrd_client_exit);

/* Module information */
MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
MODULE_DESCRIPTION("ALSA SoC OpenRD Client");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:soc-audio");

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