bfin-eval-adav80x.c

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/*
 * Machine driver for EVAL-ADAV801 and EVAL-ADAV803 on Analog Devices bfin
 * evaluation boards.
 *
 * Copyright 2011 Analog Devices Inc.
 * Author: Lars-Peter Clausen <[email protected]>
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>

#include "../codecs/adav80x.h"

static const struct snd_soc_dapm_widget bfin_eval_adav80x_dapm_widgets[] = {
    SND_SOC_DAPM_LINE("Line Out", NULL),
    SND_SOC_DAPM_LINE("Line In", NULL),
};

static const struct snd_soc_dapm_route bfin_eval_adav80x_dapm_routes[] = {
    { "Line Out", NULL, "VOUTL" },
    { "Line Out", NULL, "VOUTR" },

    { "VINL", NULL, "Line In" },
    { "VINR", NULL, "Line In" },
};

static int bfin_eval_adav80x_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;
    int ret;

    ret = snd_soc_dai_set_pll(codec_dai, ADAV80X_PLL1, ADAV80X_PLL_SRC_XTAL,
            27000000, params_rate(params) * 256);
    if (ret)
        return ret;

    ret = snd_soc_dai_set_sysclk(codec_dai, ADAV80X_CLK_PLL1,
            params_rate(params) * 256, SND_SOC_CLOCK_IN);

    return ret;
}

static int bfin_eval_adav80x_codec_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_dai *codec_dai = rtd->codec_dai;

    snd_soc_dai_set_sysclk(codec_dai, ADAV80X_CLK_SYSCLK1, 0,
        SND_SOC_CLOCK_OUT);
    snd_soc_dai_set_sysclk(codec_dai, ADAV80X_CLK_SYSCLK2, 0,
        SND_SOC_CLOCK_OUT);
    snd_soc_dai_set_sysclk(codec_dai, ADAV80X_CLK_SYSCLK3, 0,
        SND_SOC_CLOCK_OUT);

    snd_soc_dai_set_sysclk(codec_dai, ADAV80X_CLK_XTAL, 2700000, 0);

    return 0;
}

static struct snd_soc_ops bfin_eval_adav80x_ops = {
    .hw_params = bfin_eval_adav80x_hw_params,
};

static struct snd_soc_dai_link bfin_eval_adav80x_dais[] = {
    {
        .name = "adav80x",
        .stream_name = "ADAV80x HiFi",
        .cpu_dai_name = "bfin-i2s.0",
        .codec_dai_name = "adav80x-hifi",
        .platform_name = "bfin-i2s-pcm-audio",
        .init = bfin_eval_adav80x_codec_init,
        .ops = &bfin_eval_adav80x_ops,
        .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
                SND_SOC_DAIFMT_CBM_CFM,
    },
};

static struct snd_soc_card bfin_eval_adav80x = {
    .name = "bfin-eval-adav80x",
    .owner = THIS_MODULE,
    .dai_link = bfin_eval_adav80x_dais,
    .num_links = ARRAY_SIZE(bfin_eval_adav80x_dais),

    .dapm_widgets       = bfin_eval_adav80x_dapm_widgets,
    .num_dapm_widgets   = ARRAY_SIZE(bfin_eval_adav80x_dapm_widgets),
    .dapm_routes        = bfin_eval_adav80x_dapm_routes,
    .num_dapm_routes    = ARRAY_SIZE(bfin_eval_adav80x_dapm_routes),
};

enum bfin_eval_adav80x_type {
    BFIN_EVAL_ADAV801,
    BFIN_EVAL_ADAV803,
};

static int bfin_eval_adav80x_probe(struct platform_device *pdev)
{
    struct snd_soc_card *card = &bfin_eval_adav80x;
    const char *codec_name;

    switch (platform_get_device_id(pdev)->driver_data) {
    case BFIN_EVAL_ADAV801:
        codec_name = "spi0.1";
        break;
    case BFIN_EVAL_ADAV803:
        codec_name = "adav803.0-0034";
        break;
    default:
        return -EINVAL;
    }

    bfin_eval_adav80x_dais[0].codec_name = codec_name;

    card->dev = &pdev->dev;

    return snd_soc_register_card(&bfin_eval_adav80x);
}

static int __devexit bfin_eval_adav80x_remove(struct platform_device *pdev)
{
    struct snd_soc_card *card = platform_get_drvdata(pdev);

    snd_soc_unregister_card(card);

    return 0;
}

static const struct platform_device_id bfin_eval_adav80x_ids[] = {
    { "bfin-eval-adav801", BFIN_EVAL_ADAV801 },
    { "bfin-eval-adav803", BFIN_EVAL_ADAV803 },
    { },
};
MODULE_DEVICE_TABLE(platform, bfin_eval_adav80x_ids);

static struct platform_driver bfin_eval_adav80x_driver = {
    .driver = {
        .name = "bfin-eval-adav80x",
        .owner = THIS_MODULE,
        .pm = &snd_soc_pm_ops,
    },
    .probe = bfin_eval_adav80x_probe,
    .remove = __devexit_p(bfin_eval_adav80x_remove),
    .id_table = bfin_eval_adav80x_ids,
};

module_platform_driver(bfin_eval_adav80x_driver);

MODULE_AUTHOR("Lars-Peter Clausen <[email protected]>");
MODULE_DESCRIPTION("ALSA SoC bfin adav80x driver");
MODULE_LICENSE("GPL");