kirkwood-openrd.c

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/*
 * kirkwood-openrd.c
 *
 * (c) 2010 Arnaud Patard <[email protected]>
 * (c) 2010 Arnaud Patard <[email protected]>
 *
 *  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 <linux/platform_data/asoc-kirkwood.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;
    unsigned int freq;

    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",
    .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS,
    .ops = &openrd_client_ops,
},
};


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

static int __devinit openrd_probe(struct platform_device *pdev)
{
    struct snd_soc_card *card = &openrd_client;
    int ret;

    card->dev = &pdev->dev;

    ret = snd_soc_register_card(card);
    if (ret)
        dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
            ret);
    return ret;
}

static int __devexit openrd_remove(struct platform_device *pdev)
{
    struct snd_soc_card *card = platform_get_drvdata(pdev);

    snd_soc_unregister_card(card);
    return 0;
}

static struct platform_driver openrd_driver = {
    .driver     = {
        .name   = "openrd-client-audio",
        .owner  = THIS_MODULE,
    },
    .probe      = openrd_probe,
    .remove     = __devexit_p(openrd_remove),
};

module_platform_driver(openrd_driver);

/* Module information */
MODULE_AUTHOR("Arnaud Patard <[email protected]>");
MODULE_DESCRIPTION("ALSA SoC OpenRD Client");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:openrd-client-audio");