e750_wm9705.c

Go to the documentation of this file.

/*
 * e750-wm9705.c  --  SoC audio for e750
 *
 * Copyright 2007 (c) Ian Molton <[email protected]>
 *
 *  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; version 2 ONLY.
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/gpio.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>

#include <mach/audio.h>
#include <mach/eseries-gpio.h>

#include <asm/mach-types.h>

#include "../codecs/wm9705.h"
#include "pxa2xx-ac97.h"

static int e750_spk_amp_event(struct snd_soc_dapm_widget *w,
                struct snd_kcontrol *kcontrol, int event)
{
    if (event & SND_SOC_DAPM_PRE_PMU)
        gpio_set_value(GPIO_E750_SPK_AMP_OFF, 0);
    else if (event & SND_SOC_DAPM_POST_PMD)
        gpio_set_value(GPIO_E750_SPK_AMP_OFF, 1);

    return 0;
}

static int e750_hp_amp_event(struct snd_soc_dapm_widget *w,
                struct snd_kcontrol *kcontrol, int event)
{
    if (event & SND_SOC_DAPM_PRE_PMU)
        gpio_set_value(GPIO_E750_HP_AMP_OFF, 0);
    else if (event & SND_SOC_DAPM_POST_PMD)
        gpio_set_value(GPIO_E750_HP_AMP_OFF, 1);

    return 0;
}

static const struct snd_soc_dapm_widget e750_dapm_widgets[] = {
    SND_SOC_DAPM_HP("Headphone Jack", NULL),
    SND_SOC_DAPM_SPK("Speaker", NULL),
    SND_SOC_DAPM_MIC("Mic (Internal)", NULL),
    SND_SOC_DAPM_PGA_E("Headphone Amp", SND_SOC_NOPM, 0, 0, NULL, 0,
            e750_hp_amp_event, SND_SOC_DAPM_PRE_PMU |
            SND_SOC_DAPM_POST_PMD),
    SND_SOC_DAPM_PGA_E("Speaker Amp", SND_SOC_NOPM, 0, 0, NULL, 0,
            e750_spk_amp_event, SND_SOC_DAPM_PRE_PMU |
            SND_SOC_DAPM_POST_PMD),
};

static const struct snd_soc_dapm_route audio_map[] = {
    {"Headphone Amp", NULL, "HPOUTL"},
    {"Headphone Amp", NULL, "HPOUTR"},
    {"Headphone Jack", NULL, "Headphone Amp"},

    {"Speaker Amp", NULL, "MONOOUT"},
    {"Speaker", NULL, "Speaker Amp"},

    {"MIC1", NULL, "Mic (Internal)"},
};

static int e750_ac97_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_nc_pin(dapm, "LOUT");
    snd_soc_dapm_nc_pin(dapm, "ROUT");
    snd_soc_dapm_nc_pin(dapm, "PHONE");
    snd_soc_dapm_nc_pin(dapm, "LINEINL");
    snd_soc_dapm_nc_pin(dapm, "LINEINR");
    snd_soc_dapm_nc_pin(dapm, "CDINL");
    snd_soc_dapm_nc_pin(dapm, "CDINR");
    snd_soc_dapm_nc_pin(dapm, "PCBEEP");
    snd_soc_dapm_nc_pin(dapm, "MIC2");

    snd_soc_dapm_new_controls(dapm, e750_dapm_widgets,
                    ARRAY_SIZE(e750_dapm_widgets));

    snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));

    return 0;
}

static struct snd_soc_dai_link e750_dai[] = {
    {
        .name = "AC97",
        .stream_name = "AC97 HiFi",
        .cpu_dai_name = "pxa2xx-ac97",
        .codec_dai_name = "wm9705-hifi",
        .platform_name = "pxa-pcm-audio",
        .codec_name = "wm9705-codec",
        .init = e750_ac97_init,
        /* use ops to check startup state */
    },
    {
        .name = "AC97 Aux",
        .stream_name = "AC97 Aux",
        .cpu_dai_name = "pxa2xx-ac97-aux",
        .codec_dai_name ="wm9705-aux",
        .platform_name = "pxa-pcm-audio",
        .codec_name = "wm9705-codec",
    },
};

static struct snd_soc_card e750 = {
    .name = "Toshiba e750",
    .owner = THIS_MODULE,
    .dai_link = e750_dai,
    .num_links = ARRAY_SIZE(e750_dai),
};

static struct gpio e750_audio_gpios[] = {
    { GPIO_E750_HP_AMP_OFF, GPIOF_OUT_INIT_HIGH, "Headphone amp" },
    { GPIO_E750_SPK_AMP_OFF, GPIOF_OUT_INIT_HIGH, "Speaker amp" },
};

static int __devinit e750_probe(struct platform_device *pdev)
{
    struct snd_soc_card *card = &e750;
    int ret;

    ret = gpio_request_array(e750_audio_gpios,
                 ARRAY_SIZE(e750_audio_gpios));
    if (ret)
        return 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);
        gpio_free_array(e750_audio_gpios, ARRAY_SIZE(e750_audio_gpios));
    }
    return ret;
}

static int __devexit e750_remove(struct platform_device *pdev)
{
    struct snd_soc_card *card = platform_get_drvdata(pdev);

    gpio_free_array(e750_audio_gpios, ARRAY_SIZE(e750_audio_gpios));
    snd_soc_unregister_card(card);
    return 0;
}

static struct platform_driver e750_driver = {
    .driver     = {
        .name   = "e750-audio",
        .owner  = THIS_MODULE,
    },
    .probe      = e750_probe,
    .remove     = __devexit_p(e750_remove),
};

module_platform_driver(e750_driver);

/* Module information */
MODULE_AUTHOR("Ian Molton <[email protected]>");
MODULE_DESCRIPTION("ALSA SoC driver for e750");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:e750-audio");