brownstone.c

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/*
 * linux/sound/soc/pxa/brownstone.c
 *
 * Copyright (C) 2011 Marvell International Ltd.
 *
 * 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 <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/jack.h>

#include "../codecs/wm8994.h"
#include "mmp-sspa.h"

static const struct snd_kcontrol_new brownstone_dapm_control[] = {
    SOC_DAPM_PIN_SWITCH("Ext Spk"),
};

static const struct snd_soc_dapm_widget brownstone_dapm_widgets[] = {
    SND_SOC_DAPM_SPK("Ext Spk", NULL),
    SND_SOC_DAPM_HP("Headset Stereophone", NULL),
    SND_SOC_DAPM_MIC("Headset Mic", NULL),
    SND_SOC_DAPM_MIC("Main Mic", NULL),
};

static const struct snd_soc_dapm_route brownstone_audio_map[] = {
    {"Ext Spk", NULL, "SPKOUTLP"},
    {"Ext Spk", NULL, "SPKOUTLN"},
    {"Ext Spk", NULL, "SPKOUTRP"},
    {"Ext Spk", NULL, "SPKOUTRN"},

    {"Headset Stereophone", NULL, "HPOUT1L"},
    {"Headset Stereophone", NULL, "HPOUT1R"},

    {"IN1RN", NULL, "Headset Mic"},

    {"DMIC1DAT", NULL, "MICBIAS1"},
    {"MICBIAS1", NULL, "Main Mic"},
};

static int brownstone_wm8994_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_codec *codec = rtd->codec;
    struct snd_soc_dapm_context *dapm = &codec->dapm;

    snd_soc_dapm_enable_pin(dapm, "Ext Spk");
    snd_soc_dapm_enable_pin(dapm, "Headset Stereophone");
    snd_soc_dapm_enable_pin(dapm, "Headset Mic");
    snd_soc_dapm_enable_pin(dapm, "Main Mic");

    /* set endpoints to not connected */
    snd_soc_dapm_nc_pin(dapm, "HPOUT2P");
    snd_soc_dapm_nc_pin(dapm, "HPOUT2N");
    snd_soc_dapm_nc_pin(dapm, "LINEOUT1N");
    snd_soc_dapm_nc_pin(dapm, "LINEOUT1P");
    snd_soc_dapm_nc_pin(dapm, "LINEOUT2N");
    snd_soc_dapm_nc_pin(dapm, "LINEOUT2P");
    snd_soc_dapm_nc_pin(dapm, "IN1LN");
    snd_soc_dapm_nc_pin(dapm, "IN1LP");
    snd_soc_dapm_nc_pin(dapm, "IN1RP");
    snd_soc_dapm_nc_pin(dapm, "IN2LP:VXRN");
    snd_soc_dapm_nc_pin(dapm, "IN2RN");
    snd_soc_dapm_nc_pin(dapm, "IN2RP:VXRP");
    snd_soc_dapm_nc_pin(dapm, "IN2LN");

    snd_soc_dapm_sync(dapm);

    return 0;
}

static int brownstone_wm8994_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 freq_out, sspa_mclk, sysclk;
    int sspa_div;

    if (params_rate(params) > 11025) {
        freq_out  = params_rate(params) * 512;
        sysclk    = params_rate(params) * 256;
        sspa_mclk = params_rate(params) * 64;
    } else {
        freq_out  = params_rate(params) * 1024;
        sysclk    = params_rate(params) * 512;
        sspa_mclk = params_rate(params) * 64;
    }
    sspa_div = freq_out;
    do_div(sspa_div, sspa_mclk);

    snd_soc_dai_set_sysclk(cpu_dai, MMP_SSPA_CLK_AUDIO, freq_out, 0);
    snd_soc_dai_set_pll(cpu_dai, MMP_SYSCLK, 0, freq_out, sysclk);
    snd_soc_dai_set_pll(cpu_dai, MMP_SSPA_CLK, 0, freq_out, sspa_mclk);

    /* set wm8994 sysclk */
    snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_MCLK1, sysclk, 0);

    return 0;
}

/* machine stream operations */
static struct snd_soc_ops brownstone_ops = {
    .hw_params = brownstone_wm8994_hw_params,
};

static struct snd_soc_dai_link brownstone_wm8994_dai[] = {
{
    .name       = "WM8994",
    .stream_name    = "WM8994 HiFi",
    .cpu_dai_name   = "mmp-sspa-dai.0",
    .codec_dai_name = "wm8994-aif1",
    .platform_name  = "mmp-pcm-audio",
    .codec_name = "wm8994-codec",
    .dai_fmt    = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
                SND_SOC_DAIFMT_CBS_CFS,
    .ops        = &brownstone_ops,
    .init       = brownstone_wm8994_init,
},
};

/* audio machine driver */
static struct snd_soc_card brownstone = {
    .name         = "brownstone",
    .dai_link     = brownstone_wm8994_dai,
    .num_links    = ARRAY_SIZE(brownstone_wm8994_dai),

    .controls = brownstone_dapm_control,
    .num_controls = ARRAY_SIZE(brownstone_dapm_control),
    .dapm_widgets = brownstone_dapm_widgets,
    .num_dapm_widgets = ARRAY_SIZE(brownstone_dapm_widgets),
    .dapm_routes = brownstone_audio_map,
    .num_dapm_routes = ARRAY_SIZE(brownstone_audio_map),
};

static int __devinit brownstone_probe(struct platform_device *pdev)
{
    int ret;

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

static int __devexit brownstone_remove(struct platform_device *pdev)
{
    snd_soc_unregister_card(&brownstone);
    return 0;
}

static struct platform_driver mmp_driver = {
    .driver     = {
        .name   = "brownstone-audio",
        .owner  = THIS_MODULE,
    },
    .probe      = brownstone_probe,
    .remove     = __devexit_p(brownstone_remove),
};

module_platform_driver(mmp_driver);

MODULE_AUTHOR("Leo Yan <[email protected]>");
MODULE_DESCRIPTION("ALSA SoC Brownstone");
MODULE_LICENSE("GPL");