neo1973_wm8753.c

Go to the documentation of this file.

/*
 * neo1973_wm8753.c  --  SoC audio for Openmoko Neo1973 and Freerunner devices
 *
 * Copyright 2007 Openmoko Inc
 * Author: Graeme Gregory <[email protected]>
 * Copyright 2007 Wolfson Microelectronics PLC.
 * Author: Graeme Gregory
 *         [email protected] or [email protected]
 * Copyright 2009 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 <linux/module.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>

#include <sound/soc.h>

#include <asm/mach-types.h>
#include <plat/regs-iis.h>
#include <mach/gta02.h>

#include "../codecs/wm8753.h"
#include "s3c24xx-i2s.h"

static int neo1973_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 pll_out = 0, bclk = 0;
    int ret = 0;
    unsigned long iis_clkrate;

    iis_clkrate = s3c24xx_i2s_get_clockrate();

    switch (params_rate(params)) {
    case 8000:
    case 16000:
        pll_out = 12288000;
        break;
    case 48000:
        bclk = WM8753_BCLK_DIV_4;
        pll_out = 12288000;
        break;
    case 96000:
        bclk = WM8753_BCLK_DIV_2;
        pll_out = 12288000;
        break;
    case 11025:
        bclk = WM8753_BCLK_DIV_16;
        pll_out = 11289600;
        break;
    case 22050:
        bclk = WM8753_BCLK_DIV_8;
        pll_out = 11289600;
        break;
    case 44100:
        bclk = WM8753_BCLK_DIV_4;
        pll_out = 11289600;
        break;
    case 88200:
        bclk = WM8753_BCLK_DIV_2;
        pll_out = 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_CBM_CFM);
    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_CBM_CFM);
    if (ret < 0)
        return ret;

    /* set the codec system clock for DAC and ADC */
    ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, pll_out,
        SND_SOC_CLOCK_IN);
    if (ret < 0)
        return ret;

    /* set MCLK division for sample rate */
    ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
        S3C2410_IISMOD_32FS);
    if (ret < 0)
        return ret;

    /* set codec BCLK division for sample rate */
    ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_BCLKDIV, bclk);
    if (ret < 0)
        return ret;

    /* set prescaler division for sample rate */
    ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
        S3C24XX_PRESCALE(4, 4));
    if (ret < 0)
        return ret;

    /* codec PLL input is PCLK/4 */
    ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0,
        iis_clkrate / 4, pll_out);
    if (ret < 0)
        return ret;

    return 0;
}

static int neo1973_hifi_hw_free(struct snd_pcm_substream *substream)
{
    struct snd_soc_pcm_runtime *rtd = substream->private_data;
    struct snd_soc_dai *codec_dai = rtd->codec_dai;

    /* disable the PLL */
    return snd_soc_dai_set_pll(codec_dai, WM8753_PLL1, 0, 0, 0);
}

/*
 * Neo1973 WM8753 HiFi DAI opserations.
 */
static struct snd_soc_ops neo1973_hifi_ops = {
    .hw_params = neo1973_hifi_hw_params,
    .hw_free = neo1973_hifi_hw_free,
};

static int neo1973_voice_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;
    unsigned int pcmdiv = 0;
    int ret = 0;
    unsigned long iis_clkrate;

    iis_clkrate = s3c24xx_i2s_get_clockrate();

    if (params_rate(params) != 8000)
        return -EINVAL;
    if (params_channels(params) != 1)
        return -EINVAL;

    pcmdiv = WM8753_PCM_DIV_6; /* 2.048 MHz */

    /* todo: gg check mode (DSP_B) against CSR datasheet */
    /* set codec DAI configuration */
    ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B |
        SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
    if (ret < 0)
        return ret;

    /* set the codec system clock for DAC and ADC */
    ret = snd_soc_dai_set_sysclk(codec_dai, WM8753_PCMCLK, 12288000,
        SND_SOC_CLOCK_IN);
    if (ret < 0)
        return ret;

    /* set codec PCM division for sample rate */
    ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_PCMDIV, pcmdiv);
    if (ret < 0)
        return ret;

    /* configure and enable PLL for 12.288MHz output */
    ret = snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0,
        iis_clkrate / 4, 12288000);
    if (ret < 0)
        return ret;

    return 0;
}

static int neo1973_voice_hw_free(struct snd_pcm_substream *substream)
{
    struct snd_soc_pcm_runtime *rtd = substream->private_data;
    struct snd_soc_dai *codec_dai = rtd->codec_dai;

    /* disable the PLL */
    return snd_soc_dai_set_pll(codec_dai, WM8753_PLL2, 0, 0, 0);
}

static struct snd_soc_ops neo1973_voice_ops = {
    .hw_params = neo1973_voice_hw_params,
    .hw_free = neo1973_voice_hw_free,
};

/* Shared routes and controls */

static const struct snd_soc_dapm_widget neo1973_wm8753_dapm_widgets[] = {
    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("Handset Mic", NULL),
};

static const struct snd_soc_dapm_route neo1973_wm8753_routes[] = {
    /* Connections to the GSM Module */
    {"GSM Line Out", NULL, "MONO1"},
    {"GSM Line Out", NULL, "MONO2"},
    {"RXP", NULL, "GSM Line In"},
    {"RXN", NULL, "GSM Line In"},

    /* Connections to Headset */
    {"MIC1", NULL, "Mic Bias"},
    {"Mic Bias", NULL, "Headset Mic"},

    /* Call Mic */
    {"MIC2", NULL, "Mic Bias"},
    {"MIC2N", NULL, "Mic Bias"},
    {"Mic Bias", NULL, "Handset Mic"},

    /* Connect the ALC pins */
    {"ACIN", NULL, "ACOP"},
};

static const struct snd_kcontrol_new neo1973_wm8753_controls[] = {
    SOC_DAPM_PIN_SWITCH("GSM Line Out"),
    SOC_DAPM_PIN_SWITCH("GSM Line In"),
    SOC_DAPM_PIN_SWITCH("Headset Mic"),
    SOC_DAPM_PIN_SWITCH("Handset Mic"),
};

/* GTA02 specific routes and controls */

static int gta02_speaker_enabled;

static int lm4853_set_spk(struct snd_kcontrol *kcontrol,
    struct snd_ctl_elem_value *ucontrol)
{
    gta02_speaker_enabled = ucontrol->value.integer.value[0];

    gpio_set_value(GTA02_GPIO_HP_IN, !gta02_speaker_enabled);

    return 0;
}

static int lm4853_get_spk(struct snd_kcontrol *kcontrol,
    struct snd_ctl_elem_value *ucontrol)
{
    ucontrol->value.integer.value[0] = gta02_speaker_enabled;
    return 0;
}

static int lm4853_event(struct snd_soc_dapm_widget *w,
            struct snd_kcontrol *k, int event)
{
    gpio_set_value(GTA02_GPIO_AMP_SHUT, SND_SOC_DAPM_EVENT_OFF(event));

    return 0;
}

static const struct snd_soc_dapm_route neo1973_gta02_routes[] = {
    /* Connections to the amp */
    {"Stereo Out", NULL, "LOUT1"},
    {"Stereo Out", NULL, "ROUT1"},

    /* Call Speaker */
    {"Handset Spk", NULL, "LOUT2"},
    {"Handset Spk", NULL, "ROUT2"},
};

static const struct snd_kcontrol_new neo1973_gta02_wm8753_controls[] = {
    SOC_DAPM_PIN_SWITCH("Handset Spk"),
    SOC_DAPM_PIN_SWITCH("Stereo Out"),

    SOC_SINGLE_BOOL_EXT("Amp Spk Switch", 0,
        lm4853_get_spk,
        lm4853_set_spk),
};

static const struct snd_soc_dapm_widget neo1973_gta02_wm8753_dapm_widgets[] = {
    SND_SOC_DAPM_SPK("Handset Spk", NULL),
    SND_SOC_DAPM_SPK("Stereo Out", lm4853_event),
};

static int neo1973_gta02_wm8753_init(struct snd_soc_codec *codec)
{
    struct snd_soc_dapm_context *dapm = &codec->dapm;
    int ret;

    ret = snd_soc_dapm_new_controls(dapm, neo1973_gta02_wm8753_dapm_widgets,
            ARRAY_SIZE(neo1973_gta02_wm8753_dapm_widgets));
    if (ret)
        return ret;

    ret = snd_soc_dapm_add_routes(dapm, neo1973_gta02_routes,
            ARRAY_SIZE(neo1973_gta02_routes));
    if (ret)
        return ret;

    ret = snd_soc_add_card_controls(codec->card, neo1973_gta02_wm8753_controls,
            ARRAY_SIZE(neo1973_gta02_wm8753_controls));
    if (ret)
        return ret;

    snd_soc_dapm_disable_pin(dapm, "Stereo Out");
    snd_soc_dapm_disable_pin(dapm, "Handset Spk");
    snd_soc_dapm_ignore_suspend(dapm, "Stereo Out");
    snd_soc_dapm_ignore_suspend(dapm, "Handset Spk");

    return 0;
}

static int neo1973_wm8753_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_codec *codec = rtd->codec;
    struct snd_soc_dapm_context *dapm = &codec->dapm;
    int ret;

    /* set up NC codec pins */
    snd_soc_dapm_nc_pin(dapm, "OUT3");
    snd_soc_dapm_nc_pin(dapm, "OUT4");
    snd_soc_dapm_nc_pin(dapm, "LINE1");
    snd_soc_dapm_nc_pin(dapm, "LINE2");

    /* Add neo1973 specific widgets */
    ret = snd_soc_dapm_new_controls(dapm, neo1973_wm8753_dapm_widgets,
            ARRAY_SIZE(neo1973_wm8753_dapm_widgets));
    if (ret)
        return ret;

    /* add neo1973 specific controls */
    ret = snd_soc_add_card_controls(rtd->card, neo1973_wm8753_controls,
            ARRAY_SIZE(neo1973_wm8753_controls));
    if (ret)
        return ret;

    /* set up neo1973 specific audio routes */
    ret = snd_soc_dapm_add_routes(dapm, neo1973_wm8753_routes,
            ARRAY_SIZE(neo1973_wm8753_routes));
    if (ret)
        return ret;

    /* set endpoints to default off mode */
    snd_soc_dapm_disable_pin(dapm, "GSM Line Out");
    snd_soc_dapm_disable_pin(dapm, "GSM Line In");
    snd_soc_dapm_disable_pin(dapm, "Headset Mic");
    snd_soc_dapm_disable_pin(dapm, "Handset Mic");

    /* allow audio paths from the GSM modem to run during suspend */
    snd_soc_dapm_ignore_suspend(dapm, "GSM Line Out");
    snd_soc_dapm_ignore_suspend(dapm, "GSM Line In");
    snd_soc_dapm_ignore_suspend(dapm, "Headset Mic");
    snd_soc_dapm_ignore_suspend(dapm, "Handset Mic");

    if (machine_is_neo1973_gta02()) {
        ret = neo1973_gta02_wm8753_init(codec);
        if (ret)
            return ret;
    }

    return 0;
}

static struct snd_soc_dai_link neo1973_dai[] = {
{ /* Hifi Playback - for similatious use with voice below */
    .name = "WM8753",
    .stream_name = "WM8753 HiFi",
    .platform_name = "samsung-audio",
    .cpu_dai_name = "s3c24xx-iis",
    .codec_dai_name = "wm8753-hifi",
    .codec_name = "wm8753.0-001a",
    .init = neo1973_wm8753_init,
    .ops = &neo1973_hifi_ops,
},
{ /* Voice via BT */
    .name = "Bluetooth",
    .stream_name = "Voice",
    .cpu_dai_name = "dfbmcs320-pcm",
    .codec_dai_name = "wm8753-voice",
    .codec_name = "wm8753.0-001a",
    .ops = &neo1973_voice_ops,
},
};

static struct snd_soc_aux_dev neo1973_aux_devs[] = {
    {
        .name = "dfbmcs320",
        .codec_name = "dfbmcs320.0",
    },
};

static struct snd_soc_codec_conf neo1973_codec_conf[] = {
    {
        .dev_name = "lm4857.0-007c",
        .name_prefix = "Amp",
    },
};

static const struct gpio neo1973_gta02_gpios[] = {
    { GTA02_GPIO_HP_IN, GPIOF_OUT_INIT_HIGH, "GTA02_HP_IN" },
    { GTA02_GPIO_AMP_SHUT, GPIOF_OUT_INIT_HIGH, "GTA02_AMP_SHUT" },
};

static struct snd_soc_card neo1973 = {
    .name = "neo1973",
    .owner = THIS_MODULE,
    .dai_link = neo1973_dai,
    .num_links = ARRAY_SIZE(neo1973_dai),
    .aux_dev = neo1973_aux_devs,
    .num_aux_devs = ARRAY_SIZE(neo1973_aux_devs),
    .codec_conf = neo1973_codec_conf,
    .num_configs = ARRAY_SIZE(neo1973_codec_conf),
};

static struct platform_device *neo1973_snd_device;

static int __init neo1973_init(void)
{
    int ret;

    if (!machine_is_neo1973_gta02())
        return -ENODEV;

    if (machine_is_neo1973_gta02()) {
        neo1973.name = "neo1973gta02";
        neo1973.num_aux_devs = 1;

        ret = gpio_request_array(neo1973_gta02_gpios,
                ARRAY_SIZE(neo1973_gta02_gpios));
        if (ret)
            return ret;
    }

    neo1973_snd_device = platform_device_alloc("soc-audio", -1);
    if (!neo1973_snd_device) {
        ret = -ENOMEM;
        goto err_gpio_free;
    }

    platform_set_drvdata(neo1973_snd_device, &neo1973);
    ret = platform_device_add(neo1973_snd_device);

    if (ret)
        goto err_put_device;

    return 0;

err_put_device:
    platform_device_put(neo1973_snd_device);
err_gpio_free:
    if (machine_is_neo1973_gta02()) {
        gpio_free_array(neo1973_gta02_gpios,
                ARRAY_SIZE(neo1973_gta02_gpios));
    }
    return ret;
}
module_init(neo1973_init);

static void __exit neo1973_exit(void)
{
    platform_device_unregister(neo1973_snd_device);

    if (machine_is_neo1973_gta02()) {
        gpio_free_array(neo1973_gta02_gpios,
                ARRAY_SIZE(neo1973_gta02_gpios));
    }
}
module_exit(neo1973_exit);

/* Module information */
MODULE_AUTHOR("Graeme Gregory, [email protected], www.openmoko.org");
MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973 and Frerunner");
MODULE_LICENSE("GPL");