bf5xx-ad1836.c

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/*
 * File:         sound/soc/blackfin/bf5xx-ad1836.c
 * Author:       Barry Song <[email protected]>
 *
 * Created:      Aug 4 2009
 * Description:  Board driver for ad1836 sound chip
 *
 * Bugs:         Enter bugs at http://blackfin.uclinux.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/device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/pcm_params.h>

#include <asm/blackfin.h>
#include <asm/cacheflush.h>
#include <asm/irq.h>
#include <asm/dma.h>
#include <asm/portmux.h>

#include "../codecs/ad1836.h"

#include "bf5xx-tdm-pcm.h"
#include "bf5xx-tdm.h"

static struct snd_soc_card bf5xx_ad1836;

static int bf5xx_ad1836_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->cpu_dai;
    unsigned int channel_map[] = {0, 4, 1, 5, 2, 6, 3, 7};
    int ret = 0;

    /* set cpu DAI channel mapping */
    ret = snd_soc_dai_set_channel_map(cpu_dai, ARRAY_SIZE(channel_map),
        channel_map, ARRAY_SIZE(channel_map), channel_map);
    if (ret < 0)
        return ret;

    return 0;
}

static struct snd_soc_ops bf5xx_ad1836_ops = {
    .hw_params = bf5xx_ad1836_hw_params,
};

#define BF5XX_AD1836_DAIFMT (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_IB_IF | \
                SND_SOC_DAIFMT_CBM_CFM)

static struct snd_soc_dai_link bf5xx_ad1836_dai = {
    .name = "ad1836",
    .stream_name = "AD1836",
    .codec_dai_name = "ad1836-hifi",
    .platform_name = "bfin-tdm-pcm-audio",
    .ops = &bf5xx_ad1836_ops,
    .dai_fmt = BF5XX_AD1836_DAIFMT,
};

static struct snd_soc_card bf5xx_ad1836 = {
    .name = "bfin-ad1836",
    .owner = THIS_MODULE,
    .dai_link = &bf5xx_ad1836_dai,
    .num_links = 1,
};

static __devinit int bf5xx_ad1836_driver_probe(struct platform_device *pdev)
{
    struct snd_soc_card *card = &bf5xx_ad1836;
    const char **link_name;
    int ret;

    link_name = pdev->dev.platform_data;
    if (!link_name) {
        dev_err(&pdev->dev, "No platform data supplied\n");
        return -EINVAL;
    }
    bf5xx_ad1836_dai.cpu_dai_name = link_name[0];
    bf5xx_ad1836_dai.codec_name = link_name[1];

    card->dev = &pdev->dev;
    platform_set_drvdata(pdev, card);

    ret = snd_soc_register_card(card);
    if (ret)
        dev_err(&pdev->dev, "Failed to register card\n");
    return ret;
}

static int __devexit bf5xx_ad1836_driver_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 bf5xx_ad1836_driver = {
    .driver = {
        .name = "bfin-snd-ad1836",
        .owner = THIS_MODULE,
        .pm = &snd_soc_pm_ops,
    },
    .probe = bf5xx_ad1836_driver_probe,
    .remove = __devexit_p(bf5xx_ad1836_driver_remove),
};
module_platform_driver(bf5xx_ad1836_driver);

/* Module information */
MODULE_AUTHOR("Barry Song");
MODULE_DESCRIPTION("ALSA SoC AD1836 board driver");
MODULE_LICENSE("GPL");