smartq_wm8987.c

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/* sound/soc/samsung/smartq_wm8987.c
 *
 * Copyright 2010 Maurus Cuelenaere <[email protected]>
 *
 * Based on smdk6410_wm8987.c
 *     Copyright 2007 Wolfson Microelectronics PLC. - [email protected]
 *     Graeme Gregory - [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.
 *
 */

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

#include <sound/soc.h>
#include <sound/jack.h>

#include <asm/mach-types.h>

#include "i2s.h"
#include "../codecs/wm8750.h"

/*
 * WM8987 is register compatible with WM8750, so using that as base driver.
 */

static struct snd_soc_card snd_soc_smartq;

static int smartq_hifi_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;
    unsigned int clk = 0;
    int ret;

    switch (params_rate(params)) {
    case 8000:
    case 16000:
    case 32000:
    case 48000:
    case 96000:
        clk = 12288000;
        break;
    case 11025:
    case 22050:
    case 44100:
    case 88200:
        clk = 11289600;
        break;
    }

    /* set codec DAI configuration */
    ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
                         SND_SOC_DAIFMT_NB_NF |
                         SND_SOC_DAIFMT_CBS_CFS);
    if (ret < 0)
        return ret;

    /* set cpu DAI configuration */
    ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
                       SND_SOC_DAIFMT_NB_NF |
                       SND_SOC_DAIFMT_CBS_CFS);
    if (ret < 0)
        return ret;

    /* Use PCLK for I2S signal generation */
    ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
                    0, SND_SOC_CLOCK_IN);
    if (ret < 0)
        return ret;

    /* Gate the RCLK output on PAD */
    ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
                    0, SND_SOC_CLOCK_IN);
    if (ret < 0)
        return ret;

    /* set the codec system clock for DAC and ADC */
    ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
                     SND_SOC_CLOCK_IN);
    if (ret < 0)
        return ret;

    return 0;
}

/*
 * SmartQ WM8987 HiFi DAI operations.
 */
static struct snd_soc_ops smartq_hifi_ops = {
    .hw_params = smartq_hifi_hw_params,
};

static struct snd_soc_jack smartq_jack;

static struct snd_soc_jack_pin smartq_jack_pins[] = {
    /* Disable speaker when headphone is plugged in */
    {
        .pin    = "Internal Speaker",
        .mask   = SND_JACK_HEADPHONE,
    },
};

static struct snd_soc_jack_gpio smartq_jack_gpios[] = {
    {
        .gpio       = S3C64XX_GPL(12),
        .name       = "headphone detect",
        .report     = SND_JACK_HEADPHONE,
        .debounce_time  = 200,
    },
};

static const struct snd_kcontrol_new wm8987_smartq_controls[] = {
    SOC_DAPM_PIN_SWITCH("Internal Speaker"),
    SOC_DAPM_PIN_SWITCH("Headphone Jack"),
    SOC_DAPM_PIN_SWITCH("Internal Mic"),
};

static int smartq_speaker_event(struct snd_soc_dapm_widget *w,
                struct snd_kcontrol *k,
                int event)
{
    gpio_set_value(S3C64XX_GPK(12), SND_SOC_DAPM_EVENT_OFF(event));

    return 0;
}

static const struct snd_soc_dapm_widget wm8987_dapm_widgets[] = {
    SND_SOC_DAPM_SPK("Internal Speaker", smartq_speaker_event),
    SND_SOC_DAPM_HP("Headphone Jack", NULL),
    SND_SOC_DAPM_MIC("Internal Mic", NULL),
};

static const struct snd_soc_dapm_route audio_map[] = {
    {"Headphone Jack", NULL, "LOUT2"},
    {"Headphone Jack", NULL, "ROUT2"},

    {"Internal Speaker", NULL, "LOUT2"},
    {"Internal Speaker", NULL, "ROUT2"},

    {"Mic Bias", NULL, "Internal Mic"},
    {"LINPUT2", NULL, "Mic Bias"},
};

static int smartq_wm8987_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_codec *codec = rtd->codec;
    struct snd_soc_dapm_context *dapm = &codec->dapm;
    int err = 0;

    /* set endpoints to not connected */
    snd_soc_dapm_nc_pin(dapm, "LINPUT1");
    snd_soc_dapm_nc_pin(dapm, "RINPUT1");
    snd_soc_dapm_nc_pin(dapm, "OUT3");
    snd_soc_dapm_nc_pin(dapm, "ROUT1");

    /* set endpoints to default off mode */
    snd_soc_dapm_enable_pin(dapm, "Internal Speaker");
    snd_soc_dapm_enable_pin(dapm, "Internal Mic");
    snd_soc_dapm_disable_pin(dapm, "Headphone Jack");

    /* Headphone jack detection */
    err = snd_soc_jack_new(codec, "Headphone Jack",
                   SND_JACK_HEADPHONE, &smartq_jack);
    if (err)
        return err;

    err = snd_soc_jack_add_pins(&smartq_jack, ARRAY_SIZE(smartq_jack_pins),
                    smartq_jack_pins);
    if (err)
        return err;

    err = snd_soc_jack_add_gpios(&smartq_jack,
                     ARRAY_SIZE(smartq_jack_gpios),
                     smartq_jack_gpios);

    return err;
}

static struct snd_soc_dai_link smartq_dai[] = {
    {
        .name       = "wm8987",
        .stream_name    = "SmartQ Hi-Fi",
        .cpu_dai_name   = "samsung-i2s.0",
        .codec_dai_name = "wm8750-hifi",
        .platform_name  = "samsung-audio",
        .codec_name = "wm8750.0-0x1a",
        .init       = smartq_wm8987_init,
        .ops        = &smartq_hifi_ops,
    },
};

static struct snd_soc_card snd_soc_smartq = {
    .name = "SmartQ",
    .owner = THIS_MODULE,
    .dai_link = smartq_dai,
    .num_links = ARRAY_SIZE(smartq_dai),

    .dapm_widgets = wm8987_dapm_widgets,
    .num_dapm_widgets = ARRAY_SIZE(wm8987_dapm_widgets),
    .dapm_routes = audio_map,
    .num_dapm_routes = ARRAY_SIZE(audio_map),
    .controls = wm8987_smartq_controls,
    .num_controls = ARRAY_SIZE(wm8987_smartq_controls),
};

static struct platform_device *smartq_snd_device;

static int __init smartq_init(void)
{
    int ret;

    if (!machine_is_smartq7() && !machine_is_smartq5()) {
        pr_info("Only SmartQ is supported by this ASoC driver\n");
        return -ENODEV;
    }

    smartq_snd_device = platform_device_alloc("soc-audio", -1);
    if (!smartq_snd_device)
        return -ENOMEM;

    platform_set_drvdata(smartq_snd_device, &snd_soc_smartq);

    ret = platform_device_add(smartq_snd_device);
    if (ret) {
        platform_device_put(smartq_snd_device);
        return ret;
    }

    /* Initialise GPIOs used by amplifiers */
    ret = gpio_request(S3C64XX_GPK(12), "amplifiers shutdown");
    if (ret) {
        dev_err(&smartq_snd_device->dev, "Failed to register GPK12\n");
        goto err_unregister_device;
    }

    /* Disable amplifiers */
    ret = gpio_direction_output(S3C64XX_GPK(12), 1);
    if (ret) {
        dev_err(&smartq_snd_device->dev, "Failed to configure GPK12\n");
        goto err_free_gpio_amp_shut;
    }

    return 0;

err_free_gpio_amp_shut:
    gpio_free(S3C64XX_GPK(12));
err_unregister_device:
    platform_device_unregister(smartq_snd_device);

    return ret;
}

static void __exit smartq_exit(void)
{
    gpio_free(S3C64XX_GPK(12));
    snd_soc_jack_free_gpios(&smartq_jack, ARRAY_SIZE(smartq_jack_gpios),
                smartq_jack_gpios);

    platform_device_unregister(smartq_snd_device);
}

module_init(smartq_init);
module_exit(smartq_exit);

/* Module information */
MODULE_AUTHOR("Maurus Cuelenaere <[email protected]>");
MODULE_DESCRIPTION("ALSA SoC SmartQ WM8987");
MODULE_LICENSE("GPL");