lowland.c

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/*
 * Lowland audio support
 *
 * Copyright 2011 Wolfson Microelectronics
 *
 * 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 <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/jack.h>
#include <linux/gpio.h>
#include <linux/module.h>

#include "../codecs/wm5100.h"
#include "../codecs/wm9081.h"

#define MCLK1_RATE (44100 * 512)
#define CLKOUT_RATE (44100 * 256)

static struct snd_soc_jack lowland_headset;

/* Headset jack detection DAPM pins */
static struct snd_soc_jack_pin lowland_headset_pins[] = {
    {
        .pin = "Headphone",
        .mask = SND_JACK_HEADPHONE | SND_JACK_LINEOUT,
    },
    {
        .pin = "Headset Mic",
        .mask = SND_JACK_MICROPHONE,
    },
};

static int lowland_wm5100_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_codec *codec = rtd->codec;
    int ret;

    ret = snd_soc_codec_set_sysclk(codec, WM5100_CLK_SYSCLK,
                       WM5100_CLKSRC_MCLK1, MCLK1_RATE,
                       SND_SOC_CLOCK_IN);
    if (ret < 0) {
        pr_err("Failed to set SYSCLK clock source: %d\n", ret);
        return ret;
    }

    /* Clock OPCLK, used by the other audio components. */
    ret = snd_soc_codec_set_sysclk(codec, WM5100_CLK_OPCLK, 0,
                       CLKOUT_RATE, 0);
    if (ret < 0) {
        pr_err("Failed to set OPCLK rate: %d\n", ret);
        return ret;
    }

    ret = snd_soc_jack_new(codec, "Headset",
                   SND_JACK_LINEOUT | SND_JACK_HEADSET |
                   SND_JACK_BTN_0,
                   &lowland_headset);
    if (ret)
        return ret;

    ret = snd_soc_jack_add_pins(&lowland_headset,
                    ARRAY_SIZE(lowland_headset_pins),
                    lowland_headset_pins);
    if (ret)
        return ret;

    wm5100_detect(codec, &lowland_headset);

    return 0;
}

static int lowland_wm9081_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_codec *codec = rtd->codec;

    snd_soc_dapm_nc_pin(&codec->dapm, "LINEOUT");

    /* At any time the WM9081 is active it will have this clock */
    return snd_soc_codec_set_sysclk(codec, WM9081_SYSCLK_MCLK, 0,
                    CLKOUT_RATE, 0);
}

static const struct snd_soc_pcm_stream sub_params = {
    .formats = SNDRV_PCM_FMTBIT_S32_LE,
    .rate_min = 44100,
    .rate_max = 44100,
    .channels_min = 2,
    .channels_max = 2,
};

static struct snd_soc_dai_link lowland_dai[] = {
    {
        .name = "CPU",
        .stream_name = "CPU",
        .cpu_dai_name = "samsung-i2s.0",
        .codec_dai_name = "wm5100-aif1",
        .platform_name = "samsung-audio",
        .codec_name = "wm5100.1-001a",
        .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
                SND_SOC_DAIFMT_CBM_CFM,
        .init = lowland_wm5100_init,
    },
    {
        .name = "Baseband",
        .stream_name = "Baseband",
        .cpu_dai_name = "wm5100-aif2",
        .codec_dai_name = "wm1250-ev1",
        .codec_name = "wm1250-ev1.1-0027",
        .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
                SND_SOC_DAIFMT_CBM_CFM,
        .ignore_suspend = 1,
    },
    {
        .name = "Sub Speaker",
        .stream_name = "Sub Speaker",
        .cpu_dai_name = "wm5100-aif3",
        .codec_dai_name = "wm9081-hifi",
        .codec_name = "wm9081.1-006c",
        .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
                SND_SOC_DAIFMT_CBM_CFM,
        .ignore_suspend = 1,
        .params = &sub_params,
        .init = lowland_wm9081_init,
    },
};

static struct snd_soc_codec_conf lowland_codec_conf[] = {
    {
        .dev_name = "wm9081.1-006c",
        .name_prefix = "Sub",
    },
};

static const struct snd_kcontrol_new controls[] = {
    SOC_DAPM_PIN_SWITCH("Main Speaker"),
    SOC_DAPM_PIN_SWITCH("Main DMIC"),
    SOC_DAPM_PIN_SWITCH("Main AMIC"),
    SOC_DAPM_PIN_SWITCH("WM1250 Input"),
    SOC_DAPM_PIN_SWITCH("WM1250 Output"),
    SOC_DAPM_PIN_SWITCH("Headphone"),
};

static struct snd_soc_dapm_widget widgets[] = {
    SND_SOC_DAPM_HP("Headphone", NULL),
    SND_SOC_DAPM_MIC("Headset Mic", NULL),

    SND_SOC_DAPM_SPK("Main Speaker", NULL),

    SND_SOC_DAPM_MIC("Main AMIC", NULL),
    SND_SOC_DAPM_MIC("Main DMIC", NULL),
};

static struct snd_soc_dapm_route audio_paths[] = {
    { "Sub IN1", NULL, "HPOUT2L" },
    { "Sub IN2", NULL, "HPOUT2R" },

    { "Main Speaker", NULL, "Sub SPKN" },
    { "Main Speaker", NULL, "Sub SPKP" },
    { "Main Speaker", NULL, "SPKDAT1" },
};

static struct snd_soc_card lowland = {
    .name = "Lowland",
    .owner = THIS_MODULE,
    .dai_link = lowland_dai,
    .num_links = ARRAY_SIZE(lowland_dai),
    .codec_conf = lowland_codec_conf,
    .num_configs = ARRAY_SIZE(lowland_codec_conf),

    .controls = controls,
    .num_controls = ARRAY_SIZE(controls),
    .dapm_widgets = widgets,
    .num_dapm_widgets = ARRAY_SIZE(widgets),
    .dapm_routes = audio_paths,
    .num_dapm_routes = ARRAY_SIZE(audio_paths),
};

static __devinit int lowland_probe(struct platform_device *pdev)
{
    struct snd_soc_card *card = &lowland;
    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;
    }

    return 0;
}

static int __devexit lowland_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 lowland_driver = {
    .driver = {
        .name = "lowland",
        .owner = THIS_MODULE,
        .pm = &snd_soc_pm_ops,
    },
    .probe = lowland_probe,
    .remove = __devexit_p(lowland_remove),
};

module_platform_driver(lowland_driver);

MODULE_DESCRIPTION("Lowland audio support");
MODULE_AUTHOR("Mark Brown <[email protected]>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:lowland");