mioa701_wm9713.c

Go to the documentation of this file.

/*
 * Handles the Mitac mioa701 SoC system
 *
 * Copyright (C) 2008 Robert Jarzmik
 *
 * 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 in version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * This is a little schema of the sound interconnections :
 *
 *    Sagem X200                 Wolfson WM9713
 *    +--------+             +-------------------+      Rear Speaker
 *    |        |             |                   |           /-+
 *    |        +--->----->---+MONOIN         SPKL+--->----+-+  |
 *    |  GSM   |             |                   |        | |  |
 *    |        +--->----->---+PCBEEP         SPKR+--->----+-+  |
 *    |  CHIP  |             |                   |           \-+
 *    |        +---<-----<---+MONO               |
 *    |        |             |                   |      Front Speaker
 *    +--------+             |                   |           /-+
 *                           |                HPL+--->----+-+  |
 *                           |                   |        | |  |
 *                           |               OUT3+--->----+-+  |
 *                           |                   |           \-+
 *                           |                   |
 *                           |                   |     Front Micro
 *                           |                   |         +
 *                           |               MIC1+-----<--+o+
 *                           |                   |         +
 *                           +-------------------+        ---
 */

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

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

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/ac97_codec.h>

#include "pxa2xx-ac97.h"
#include "../codecs/wm9713.h"

#define ARRAY_AND_SIZE(x)   (x), ARRAY_SIZE(x)

#define AC97_GPIO_PULL      0x58

/* Use GPIO8 for rear speaker amplifier */
static int rear_amp_power(struct snd_soc_codec *codec, int power)
{
    unsigned short reg;

    if (power) {
        reg = snd_soc_read(codec, AC97_GPIO_CFG);
        snd_soc_write(codec, AC97_GPIO_CFG, reg | 0x0100);
        reg = snd_soc_read(codec, AC97_GPIO_PULL);
        snd_soc_write(codec, AC97_GPIO_PULL, reg | (1<<15));
    } else {
        reg = snd_soc_read(codec, AC97_GPIO_CFG);
        snd_soc_write(codec, AC97_GPIO_CFG, reg & ~0x0100);
        reg = snd_soc_read(codec, AC97_GPIO_PULL);
        snd_soc_write(codec, AC97_GPIO_PULL, reg & ~(1<<15));
    }

    return 0;
}

static int rear_amp_event(struct snd_soc_dapm_widget *widget,
              struct snd_kcontrol *kctl, int event)
{
    struct snd_soc_codec *codec = widget->codec;

    return rear_amp_power(codec, SND_SOC_DAPM_EVENT_ON(event));
}

/* mioa701 machine dapm widgets */
static const struct snd_soc_dapm_widget mioa701_dapm_widgets[] = {
    SND_SOC_DAPM_SPK("Front Speaker", NULL),
    SND_SOC_DAPM_SPK("Rear Speaker", rear_amp_event),
    SND_SOC_DAPM_MIC("Headset", NULL),
    SND_SOC_DAPM_LINE("GSM Line Out", NULL),
    SND_SOC_DAPM_LINE("GSM Line In", NULL),
    SND_SOC_DAPM_MIC("Headset Mic", NULL),
    SND_SOC_DAPM_MIC("Front Mic", NULL),
};

static const struct snd_soc_dapm_route audio_map[] = {
    /* Call Mic */
    {"Mic Bias", NULL, "Front Mic"},
    {"MIC1", NULL, "Mic Bias"},

    /* Headset Mic */
    {"LINEL", NULL, "Headset Mic"},
    {"LINER", NULL, "Headset Mic"},

    /* GSM Module */
    {"MONOIN", NULL, "GSM Line Out"},
    {"PCBEEP", NULL, "GSM Line Out"},
    {"GSM Line In", NULL, "MONO"},

    /* headphone connected to HPL, HPR */
    {"Headset", NULL, "HPL"},
    {"Headset", NULL, "HPR"},

    /* front speaker connected to HPL, OUT3 */
    {"Front Speaker", NULL, "HPL"},
    {"Front Speaker", NULL, "OUT3"},

    /* rear speaker connected to SPKL, SPKR */
    {"Rear Speaker", NULL, "SPKL"},
    {"Rear Speaker", NULL, "SPKR"},
};

static int mioa701_wm9713_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_codec *codec = rtd->codec;
    struct snd_soc_dapm_context *dapm = &codec->dapm;
    unsigned short reg;

    /* Add mioa701 specific widgets */
    snd_soc_dapm_new_controls(dapm, ARRAY_AND_SIZE(mioa701_dapm_widgets));

    /* Set up mioa701 specific audio path audio_mapnects */
    snd_soc_dapm_add_routes(dapm, ARRAY_AND_SIZE(audio_map));

    /* Prepare GPIO8 for rear speaker amplifier */
    reg = codec->driver->read(codec, AC97_GPIO_CFG);
    codec->driver->write(codec, AC97_GPIO_CFG, reg | 0x0100);

    /* Prepare MIC input */
    reg = codec->driver->read(codec, AC97_3D_CONTROL);
    codec->driver->write(codec, AC97_3D_CONTROL, reg | 0xc000);

    snd_soc_dapm_enable_pin(dapm, "Front Speaker");
    snd_soc_dapm_enable_pin(dapm, "Rear Speaker");
    snd_soc_dapm_enable_pin(dapm, "Front Mic");
    snd_soc_dapm_enable_pin(dapm, "GSM Line In");
    snd_soc_dapm_enable_pin(dapm, "GSM Line Out");

    return 0;
}

static struct snd_soc_ops mioa701_ops;

static struct snd_soc_dai_link mioa701_dai[] = {
    {
        .name = "AC97",
        .stream_name = "AC97 HiFi",
        .cpu_dai_name = "pxa2xx-ac97",
        .codec_dai_name = "wm9713-hifi",
        .codec_name = "wm9713-codec",
        .init = mioa701_wm9713_init,
        .platform_name = "pxa-pcm-audio",
        .ops = &mioa701_ops,
    },
    {
        .name = "AC97 Aux",
        .stream_name = "AC97 Aux",
        .cpu_dai_name = "pxa2xx-ac97-aux",
        .codec_dai_name ="wm9713-aux",
        .codec_name = "wm9713-codec",
        .platform_name = "pxa-pcm-audio",
        .ops = &mioa701_ops,
    },
};

static struct snd_soc_card mioa701 = {
    .name = "MioA701",
    .owner = THIS_MODULE,
    .dai_link = mioa701_dai,
    .num_links = ARRAY_SIZE(mioa701_dai),
};

static int __devinit mioa701_wm9713_probe(struct platform_device *pdev)
{
    int rc;

    if (!machine_is_mioa701())
        return -ENODEV;

    mioa701.dev = &pdev->dev;
    rc =  snd_soc_register_card(&mioa701);
    if (!rc)
        dev_warn(&pdev->dev, "Be warned that incorrect mixers/muxes setup will"
             "lead to overheating and possible destruction of your device."
             " Do not use without a good knowledge of mio's board design!\n");
    return rc;
}

static int __devexit mioa701_wm9713_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 mioa701_wm9713_driver = {
    .probe      = mioa701_wm9713_probe,
    .remove     = __devexit_p(mioa701_wm9713_remove),
    .driver     = {
        .name       = "mioa701-wm9713",
        .owner      = THIS_MODULE,
    },
};

module_platform_driver(mioa701_wm9713_driver);

/* Module information */
MODULE_AUTHOR("Robert Jarzmik ([email protected])");
MODULE_DESCRIPTION("ALSA SoC WM9713 MIO A701");
MODULE_LICENSE("GPL");