tosa.c

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/*
 * tosa.c  --  SoC audio for Tosa
 *
 * Copyright 2005 Wolfson Microelectronics PLC.
 * Copyright 2005 Openedhand Ltd.
 *
 * Authors: Liam Girdwood <[email protected]>
 *          Richard Purdie <[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;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 * GPIO's
 *  1 - Jack Insertion
 *  5 - Hookswitch (headset answer/hang up switch)
 *
 */

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

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

#include <asm/mach-types.h>
#include <mach/tosa.h>
#include <mach/audio.h>

#include "../codecs/wm9712.h"
#include "pxa2xx-ac97.h"

#define TOSA_HP        0
#define TOSA_MIC_INT   1
#define TOSA_HEADSET   2
#define TOSA_HP_OFF    3
#define TOSA_SPK_ON    0
#define TOSA_SPK_OFF   1

static int tosa_jack_func;
static int tosa_spk_func;

static void tosa_ext_control(struct snd_soc_codec *codec)
{
    struct snd_soc_dapm_context *dapm = &codec->dapm;

    /* set up jack connection */
    switch (tosa_jack_func) {
    case TOSA_HP:
        snd_soc_dapm_disable_pin(dapm, "Mic (Internal)");
        snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
        snd_soc_dapm_disable_pin(dapm, "Headset Jack");
        break;
    case TOSA_MIC_INT:
        snd_soc_dapm_enable_pin(dapm, "Mic (Internal)");
        snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
        snd_soc_dapm_disable_pin(dapm, "Headset Jack");
        break;
    case TOSA_HEADSET:
        snd_soc_dapm_disable_pin(dapm, "Mic (Internal)");
        snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
        snd_soc_dapm_enable_pin(dapm, "Headset Jack");
        break;
    }

    if (tosa_spk_func == TOSA_SPK_ON)
        snd_soc_dapm_enable_pin(dapm, "Speaker");
    else
        snd_soc_dapm_disable_pin(dapm, "Speaker");

    snd_soc_dapm_sync(dapm);
}

static int tosa_startup(struct snd_pcm_substream *substream)
{
    struct snd_soc_pcm_runtime *rtd = substream->private_data;
    struct snd_soc_codec *codec = rtd->codec;

    mutex_lock(&codec->mutex);

    /* check the jack status at stream startup */
    tosa_ext_control(codec);

    mutex_unlock(&codec->mutex);

    return 0;
}

static struct snd_soc_ops tosa_ops = {
    .startup = tosa_startup,
};

static int tosa_get_jack(struct snd_kcontrol *kcontrol,
    struct snd_ctl_elem_value *ucontrol)
{
    ucontrol->value.integer.value[0] = tosa_jack_func;
    return 0;
}

static int tosa_set_jack(struct snd_kcontrol *kcontrol,
    struct snd_ctl_elem_value *ucontrol)
{
    struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);

    if (tosa_jack_func == ucontrol->value.integer.value[0])
        return 0;

    tosa_jack_func = ucontrol->value.integer.value[0];
    tosa_ext_control(codec);
    return 1;
}

static int tosa_get_spk(struct snd_kcontrol *kcontrol,
    struct snd_ctl_elem_value *ucontrol)
{
    ucontrol->value.integer.value[0] = tosa_spk_func;
    return 0;
}

static int tosa_set_spk(struct snd_kcontrol *kcontrol,
    struct snd_ctl_elem_value *ucontrol)
{
    struct snd_soc_codec *codec =  snd_kcontrol_chip(kcontrol);

    if (tosa_spk_func == ucontrol->value.integer.value[0])
        return 0;

    tosa_spk_func = ucontrol->value.integer.value[0];
    tosa_ext_control(codec);
    return 1;
}

/* tosa dapm event handlers */
static int tosa_hp_event(struct snd_soc_dapm_widget *w,
    struct snd_kcontrol *k, int event)
{
    gpio_set_value(TOSA_GPIO_L_MUTE, SND_SOC_DAPM_EVENT_ON(event) ? 1 :0);
    return 0;
}

/* tosa machine dapm widgets */
static const struct snd_soc_dapm_widget tosa_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone Jack", tosa_hp_event),
SND_SOC_DAPM_HP("Headset Jack", NULL),
SND_SOC_DAPM_MIC("Mic (Internal)", NULL),
SND_SOC_DAPM_SPK("Speaker", NULL),
};

/* tosa audio map */
static const struct snd_soc_dapm_route audio_map[] = {

    /* headphone connected to HPOUTL, HPOUTR */
    {"Headphone Jack", NULL, "HPOUTL"},
    {"Headphone Jack", NULL, "HPOUTR"},

    /* ext speaker connected to LOUT2, ROUT2 */
    {"Speaker", NULL, "LOUT2"},
    {"Speaker", NULL, "ROUT2"},

    /* internal mic is connected to mic1, mic2 differential - with bias */
    {"MIC1", NULL, "Mic Bias"},
    {"MIC2", NULL, "Mic Bias"},
    {"Mic Bias", NULL, "Mic (Internal)"},

    /* headset is connected to HPOUTR, and LINEINR with bias */
    {"Headset Jack", NULL, "HPOUTR"},
    {"LINEINR", NULL, "Mic Bias"},
    {"Mic Bias", NULL, "Headset Jack"},
};

static const char *jack_function[] = {"Headphone", "Mic", "Line", "Headset",
    "Off"};
static const char *spk_function[] = {"On", "Off"};
static const struct soc_enum tosa_enum[] = {
    SOC_ENUM_SINGLE_EXT(5, jack_function),
    SOC_ENUM_SINGLE_EXT(2, spk_function),
};

static const struct snd_kcontrol_new tosa_controls[] = {
    SOC_ENUM_EXT("Jack Function", tosa_enum[0], tosa_get_jack,
        tosa_set_jack),
    SOC_ENUM_EXT("Speaker Function", tosa_enum[1], tosa_get_spk,
        tosa_set_spk),
};

static int tosa_ac97_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_codec *codec = rtd->codec;
    struct snd_soc_dapm_context *dapm = &codec->dapm;
    int err;

    snd_soc_dapm_nc_pin(dapm, "OUT3");
    snd_soc_dapm_nc_pin(dapm, "MONOOUT");

    /* add tosa specific controls */
    err = snd_soc_add_codec_controls(codec, tosa_controls,
                ARRAY_SIZE(tosa_controls));
    if (err < 0)
        return err;

    /* add tosa specific widgets */
    snd_soc_dapm_new_controls(dapm, tosa_dapm_widgets,
                  ARRAY_SIZE(tosa_dapm_widgets));

    /* set up tosa specific audio path audio_map */
    snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));

    return 0;
}

static struct snd_soc_dai_link tosa_dai[] = {
{
    .name = "AC97",
    .stream_name = "AC97 HiFi",
    .cpu_dai_name = "pxa2xx-ac97",
    .codec_dai_name = "wm9712-hifi",
    .platform_name = "pxa-pcm-audio",
    .codec_name = "wm9712-codec",
    .init = tosa_ac97_init,
    .ops = &tosa_ops,
},
{
    .name = "AC97 Aux",
    .stream_name = "AC97 Aux",
    .cpu_dai_name = "pxa2xx-ac97-aux",
    .codec_dai_name = "wm9712-aux",
    .platform_name = "pxa-pcm-audio",
    .codec_name = "wm9712-codec",
    .ops = &tosa_ops,
},
};

static struct snd_soc_card tosa = {
    .name = "Tosa",
    .owner = THIS_MODULE,
    .dai_link = tosa_dai,
    .num_links = ARRAY_SIZE(tosa_dai),
};

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

    ret = gpio_request_one(TOSA_GPIO_L_MUTE, GPIOF_OUT_INIT_LOW,
                   "Headphone Jack");
    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(TOSA_GPIO_L_MUTE);
    }
    return ret;
}

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

    gpio_free(TOSA_GPIO_L_MUTE);
    snd_soc_unregister_card(card);
    return 0;
}

static struct platform_driver tosa_driver = {
    .driver     = {
        .name   = "tosa-audio",
        .owner  = THIS_MODULE,
    },
    .probe      = tosa_probe,
    .remove     = __devexit_p(tosa_remove),
};

module_platform_driver(tosa_driver);

/* Module information */
MODULE_AUTHOR("Richard Purdie");
MODULE_DESCRIPTION("ALSA SoC Tosa");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:tosa-audio");