bfin-eval-adau1373.c

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/*
 * Machine driver for EVAL-ADAU1373 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/module.h>
#include <linux/device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/pcm_params.h>

#include "../codecs/adau1373.h"

static const struct snd_soc_dapm_widget bfin_eval_adau1373_dapm_widgets[] = {
    SND_SOC_DAPM_LINE("Line In1", NULL),
    SND_SOC_DAPM_LINE("Line In2", NULL),
    SND_SOC_DAPM_LINE("Line In3", NULL),
    SND_SOC_DAPM_LINE("Line In4", NULL),

    SND_SOC_DAPM_LINE("Line Out1", NULL),
    SND_SOC_DAPM_LINE("Line Out2", NULL),
    SND_SOC_DAPM_LINE("Stereo Out", NULL),
    SND_SOC_DAPM_HP("Headphone", NULL),
    SND_SOC_DAPM_HP("Earpiece", NULL),
    SND_SOC_DAPM_SPK("Speaker", NULL),
};

static const struct snd_soc_dapm_route bfin_eval_adau1373_dapm_routes[] = {
    { "AIN1L", NULL, "Line In1" },
    { "AIN1R", NULL, "Line In1" },
    { "AIN2L", NULL, "Line In2" },
    { "AIN2R", NULL, "Line In2" },
    { "AIN3L", NULL, "Line In3" },
    { "AIN3R", NULL, "Line In3" },
    { "AIN4L", NULL, "Line In4" },
    { "AIN4R", NULL, "Line In4" },

    /* MICBIAS can be connected via a jumper to the line-in jack, since w
       don't know which one is going to be used, just power both. */
    { "Line In1", NULL, "MICBIAS1" },
    { "Line In2", NULL, "MICBIAS1" },
    { "Line In3", NULL, "MICBIAS1" },
    { "Line In4", NULL, "MICBIAS1" },
    { "Line In1", NULL, "MICBIAS2" },
    { "Line In2", NULL, "MICBIAS2" },
    { "Line In3", NULL, "MICBIAS2" },
    { "Line In4", NULL, "MICBIAS2" },

    { "Line Out1", NULL, "LOUT1L" },
    { "Line Out1", NULL, "LOUT1R" },
    { "Line Out2", NULL, "LOUT2L" },
    { "Line Out2", NULL, "LOUT2R" },
    { "Headphone", NULL, "HPL" },
    { "Headphone", NULL, "HPR" },
    { "Earpiece", NULL, "EP" },
    { "Speaker", NULL, "SPKL" },
    { "Stereo Out", NULL, "SPKR" },
};

static int bfin_eval_adau1373_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;
    int pll_rate;

    switch (params_rate(params)) {
    case 48000:
    case 8000:
    case 12000:
    case 16000:
    case 24000:
    case 32000:
        pll_rate = 48000 * 1024;
        break;
    case 44100:
    case 7350:
    case 11025:
    case 14700:
    case 22050:
    case 29400:
        pll_rate = 44100 * 1024;
        break;
    default:
        return -EINVAL;
    }

    ret = snd_soc_dai_set_pll(codec_dai, ADAU1373_PLL1,
            ADAU1373_PLL_SRC_MCLK1, 12288000, pll_rate);
    if (ret)
        return ret;

    ret = snd_soc_dai_set_sysclk(codec_dai, ADAU1373_CLK_SRC_PLL1, pll_rate,
            SND_SOC_CLOCK_IN);

    return ret;
}

static int bfin_eval_adau1373_codec_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_dai *codec_dai = rtd->codec_dai;
    unsigned int pll_rate = 48000 * 1024;
    int ret;

    ret = snd_soc_dai_set_pll(codec_dai, ADAU1373_PLL1,
            ADAU1373_PLL_SRC_MCLK1, 12288000, pll_rate);
    if (ret)
        return ret;

    ret = snd_soc_dai_set_sysclk(codec_dai, ADAU1373_CLK_SRC_PLL1, pll_rate,
            SND_SOC_CLOCK_IN);

    return ret;
}
static struct snd_soc_ops bfin_eval_adau1373_ops = {
    .hw_params = bfin_eval_adau1373_hw_params,
};

static struct snd_soc_dai_link bfin_eval_adau1373_dai = {
    .name = "adau1373",
    .stream_name = "adau1373",
    .cpu_dai_name = "bfin-i2s.0",
    .codec_dai_name = "adau1373-aif1",
    .platform_name = "bfin-i2s-pcm-audio",
    .codec_name = "adau1373.0-001a",
    .ops = &bfin_eval_adau1373_ops,
    .init = bfin_eval_adau1373_codec_init,
    .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
            SND_SOC_DAIFMT_CBM_CFM,
};

static struct snd_soc_card bfin_eval_adau1373 = {
    .name = "bfin-eval-adau1373",
    .owner = THIS_MODULE,
    .dai_link = &bfin_eval_adau1373_dai,
    .num_links = 1,

    .dapm_widgets       = bfin_eval_adau1373_dapm_widgets,
    .num_dapm_widgets   = ARRAY_SIZE(bfin_eval_adau1373_dapm_widgets),
    .dapm_routes        = bfin_eval_adau1373_dapm_routes,
    .num_dapm_routes    = ARRAY_SIZE(bfin_eval_adau1373_dapm_routes),
};

static int bfin_eval_adau1373_probe(struct platform_device *pdev)
{
    struct snd_soc_card *card = &bfin_eval_adau1373;

    card->dev = &pdev->dev;

    return snd_soc_register_card(&bfin_eval_adau1373);
}

static int __devexit bfin_eval_adau1373_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 bfin_eval_adau1373_driver = {
    .driver = {
        .name = "bfin-eval-adau1373",
        .owner = THIS_MODULE,
        .pm = &snd_soc_pm_ops,
    },
    .probe = bfin_eval_adau1373_probe,
    .remove = __devexit_p(bfin_eval_adau1373_remove),
};

module_platform_driver(bfin_eval_adau1373_driver);

MODULE_AUTHOR("Lars-Peter Clausen <[email protected]>");
MODULE_DESCRIPTION("ALSA SoC bfin adau1373 driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:bfin-eval-adau1373");