speyside.c

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/*
 * Speyside 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/wm8996.h"
#include "../codecs/wm9081.h"

#define WM8996_HPSEL_GPIO 214
#define MCLK_AUDIO_RATE (512 * 48000)

static int speyside_set_bias_level(struct snd_soc_card *card,
                   struct snd_soc_dapm_context *dapm,
                   enum snd_soc_bias_level level)
{
    struct snd_soc_dai *codec_dai = card->rtd[1].codec_dai;
    int ret;

    if (dapm->dev != codec_dai->dev)
        return 0;

    switch (level) {
    case SND_SOC_BIAS_STANDBY:
        ret = snd_soc_dai_set_sysclk(codec_dai, WM8996_SYSCLK_MCLK2,
                         32768, SND_SOC_CLOCK_IN);
        if (ret < 0)
            return ret;

        ret = snd_soc_dai_set_pll(codec_dai, WM8996_FLL_MCLK2,
                      0, 0, 0);
        if (ret < 0) {
            pr_err("Failed to stop FLL\n");
            return ret;
        }
        break;

    default:
        break;
    }

    return 0;
}

static int speyside_set_bias_level_post(struct snd_soc_card *card,
                    struct snd_soc_dapm_context *dapm,
                    enum snd_soc_bias_level level)
{
    struct snd_soc_dai *codec_dai = card->rtd[1].codec_dai;
    int ret;

    if (dapm->dev != codec_dai->dev)
        return 0;

    switch (level) {
    case SND_SOC_BIAS_PREPARE:
        if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY) {
            ret = snd_soc_dai_set_pll(codec_dai, 0,
                          WM8996_FLL_MCLK2,
                          32768, MCLK_AUDIO_RATE);
            if (ret < 0) {
                pr_err("Failed to start FLL\n");
                return ret;
            }

            ret = snd_soc_dai_set_sysclk(codec_dai,
                             WM8996_SYSCLK_FLL,
                             MCLK_AUDIO_RATE,
                             SND_SOC_CLOCK_IN);
            if (ret < 0)
                return ret;
        }
        break;

    default:
        break;
    }

    card->dapm.bias_level = level;

    return 0;
}

static struct snd_soc_jack speyside_headset;

/* Headset jack detection DAPM pins */
static struct snd_soc_jack_pin speyside_headset_pins[] = {
    {
        .pin = "Headset Mic",
        .mask = SND_JACK_MICROPHONE,
    },
};

/* Default the headphone selection to active high */
static int speyside_jack_polarity;

static int speyside_get_micbias(struct snd_soc_dapm_widget *source,
                struct snd_soc_dapm_widget *sink)
{
    if (speyside_jack_polarity && (strcmp(source->name, "MICB1") == 0))
        return 1;
    if (!speyside_jack_polarity && (strcmp(source->name, "MICB2") == 0))
        return 1;

    return 0;
}

static void speyside_set_polarity(struct snd_soc_codec *codec,
                  int polarity)
{
    speyside_jack_polarity = !polarity;
    gpio_direction_output(WM8996_HPSEL_GPIO, speyside_jack_polarity);

    /* Re-run DAPM to make sure we're using the correct mic bias */
    snd_soc_dapm_sync(&codec->dapm);
}

static int speyside_wm0010_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_dai *dai = rtd->codec_dai;
    int ret;

    ret = snd_soc_dai_set_sysclk(dai, 0, MCLK_AUDIO_RATE, 0);
    if (ret < 0)
        return ret;

    return 0;
}

static int speyside_wm8996_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_dai *dai = rtd->codec_dai;
    struct snd_soc_codec *codec = rtd->codec;
    int ret;

    ret = snd_soc_dai_set_sysclk(dai, WM8996_SYSCLK_MCLK2, 32768, 0);
    if (ret < 0)
        return ret;

    ret = gpio_request(WM8996_HPSEL_GPIO, "HP_SEL");
    if (ret != 0)
        pr_err("Failed to request HP_SEL GPIO: %d\n", ret);
    gpio_direction_output(WM8996_HPSEL_GPIO, speyside_jack_polarity);

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

    ret = snd_soc_jack_add_pins(&speyside_headset,
                    ARRAY_SIZE(speyside_headset_pins),
                    speyside_headset_pins);
    if (ret)
        return ret;

    wm8996_detect(codec, &speyside_headset, speyside_set_polarity);

    return 0;
}

static int speyside_late_probe(struct snd_soc_card *card)
{
    snd_soc_dapm_ignore_suspend(&card->dapm, "Headphone");
    snd_soc_dapm_ignore_suspend(&card->dapm, "Headset Mic");
    snd_soc_dapm_ignore_suspend(&card->dapm, "Main AMIC");
    snd_soc_dapm_ignore_suspend(&card->dapm, "Main DMIC");
    snd_soc_dapm_ignore_suspend(&card->dapm, "Main Speaker");
    snd_soc_dapm_ignore_suspend(&card->dapm, "WM1250 Output");
    snd_soc_dapm_ignore_suspend(&card->dapm, "WM1250 Input");

    return 0;
}

static const struct snd_soc_pcm_stream dsp_codec_params = {
    .formats = SNDRV_PCM_FMTBIT_S32_LE,
    .rate_min = 48000,
    .rate_max = 48000,
    .channels_min = 2,
    .channels_max = 2,
};

static struct snd_soc_dai_link speyside_dai[] = {
    {
        .name = "CPU-DSP",
        .stream_name = "CPU-DSP",
        .cpu_dai_name = "samsung-i2s.0",
        .codec_dai_name = "wm0010-sdi1",
        .platform_name = "samsung-audio",
        .codec_name = "spi0.0",
        .init = speyside_wm0010_init,
        .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
                | SND_SOC_DAIFMT_CBM_CFM,
    },
    {
        .name = "DSP-CODEC",
        .stream_name = "DSP-CODEC",
        .cpu_dai_name = "wm0010-sdi2",
        .codec_dai_name = "wm8996-aif1",
        .codec_name = "wm8996.1-001a",
        .init = speyside_wm8996_init,
        .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
                | SND_SOC_DAIFMT_CBM_CFM,
        .params = &dsp_codec_params,
        .ignore_suspend = 1,
    },
    {
        .name = "Baseband",
        .stream_name = "Baseband",
        .cpu_dai_name = "wm8996-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,
    },
};

static int speyside_wm9081_init(struct snd_soc_dapm_context *dapm)
{
    /* At any time the WM9081 is active it will have this clock */
    return snd_soc_codec_set_sysclk(dapm->codec, WM9081_SYSCLK_MCLK, 0,
                    MCLK_AUDIO_RATE, 0);
}

static struct snd_soc_aux_dev speyside_aux_dev[] = {
    {
        .name = "wm9081",
        .codec_name = "wm9081.1-006c",
        .init = speyside_wm9081_init,
    },
};

static struct snd_soc_codec_conf speyside_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[] = {
    { "IN1RN", NULL, "MICB1" },
    { "IN1RP", NULL, "MICB1" },
    { "IN1RN", NULL, "MICB2" },
    { "IN1RP", NULL, "MICB2" },
    { "MICB1", NULL, "Headset Mic", speyside_get_micbias },
    { "MICB2", NULL, "Headset Mic", speyside_get_micbias },

    { "IN1LP", NULL, "MICB2" },
    { "IN1RN", NULL, "MICB1" },
    { "MICB2", NULL, "Main AMIC" },

    { "DMIC1DAT", NULL, "MICB1" },
    { "DMIC2DAT", NULL, "MICB1" },
    { "MICB1", NULL, "Main DMIC" },

    { "Headphone", NULL, "HPOUT1L" },
    { "Headphone", NULL, "HPOUT1R" },

    { "Sub IN1", NULL, "HPOUT2L" },
    { "Sub IN2", NULL, "HPOUT2R" },

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

static struct snd_soc_card speyside = {
    .name = "Speyside",
    .owner = THIS_MODULE,
    .dai_link = speyside_dai,
    .num_links = ARRAY_SIZE(speyside_dai),
    .aux_dev = speyside_aux_dev,
    .num_aux_devs = ARRAY_SIZE(speyside_aux_dev),
    .codec_conf = speyside_codec_conf,
    .num_configs = ARRAY_SIZE(speyside_codec_conf),

    .set_bias_level = speyside_set_bias_level,
    .set_bias_level_post = speyside_set_bias_level_post,

    .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),
    .fully_routed = true,

    .late_probe = speyside_late_probe,
};

static __devinit int speyside_probe(struct platform_device *pdev)
{
    struct snd_soc_card *card = &speyside;
    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 speyside_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 speyside_driver = {
    .driver = {
        .name = "speyside",
        .owner = THIS_MODULE,
        .pm = &snd_soc_pm_ops,
    },
    .probe = speyside_probe,
    .remove = __devexit_p(speyside_remove),
};

module_platform_driver(speyside_driver);

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