mx27vis-aic32x4.c

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/*
 * mx27vis-aic32x4.c
 *
 * Copyright 2011 Vista Silicon S.L.
 *
 * Author: Javier Martin <[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.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/platform_data/asoc-mx27vis.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/tlv.h>
#include <asm/mach-types.h>

#include "../codecs/tlv320aic32x4.h"
#include "imx-ssi.h"
#include "imx-audmux.h"

#define MX27VIS_AMP_GAIN    0
#define MX27VIS_AMP_MUTE    1

static int mx27vis_amp_gain;
static int mx27vis_amp_mute;
static int mx27vis_amp_gain0_gpio;
static int mx27vis_amp_gain1_gpio;
static int mx27vis_amp_mutel_gpio;
static int mx27vis_amp_muter_gpio;

static int mx27vis_aic32x4_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;
    int ret;
    u32 dai_format;

    dai_format = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF |
        SND_SOC_DAIFMT_CBM_CFM;

    /* set codec DAI configuration */
    snd_soc_dai_set_fmt(codec_dai, dai_format);

    /* set cpu DAI configuration */
    snd_soc_dai_set_fmt(cpu_dai, dai_format);

    ret = snd_soc_dai_set_sysclk(codec_dai, 0,
                     25000000, SND_SOC_CLOCK_OUT);
    if (ret) {
        pr_err("%s: failed setting codec sysclk\n", __func__);
        return ret;
    }

    ret = snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
                SND_SOC_CLOCK_IN);
    if (ret) {
        pr_err("can't set CPU system clock IMX_SSP_SYS_CLK\n");
        return ret;
    }

    return 0;
}

static struct snd_soc_ops mx27vis_aic32x4_snd_ops = {
    .hw_params  = mx27vis_aic32x4_hw_params,
};

static int mx27vis_amp_set(struct snd_kcontrol *kcontrol,
                struct snd_ctl_elem_value *ucontrol)
{
    struct soc_mixer_control *mc =
        (struct soc_mixer_control *)kcontrol->private_value;
    int value = ucontrol->value.integer.value[0];
    unsigned int reg = mc->reg;
    int max = mc->max;

    if (value > max)
        return -EINVAL;

    switch (reg) {
    case MX27VIS_AMP_GAIN:
        gpio_set_value(mx27vis_amp_gain0_gpio, value & 1);
        gpio_set_value(mx27vis_amp_gain1_gpio, value >> 1);
        mx27vis_amp_gain = value;
        break;
    case MX27VIS_AMP_MUTE:
        gpio_set_value(mx27vis_amp_mutel_gpio, value & 1);
        gpio_set_value(mx27vis_amp_muter_gpio, value >> 1);
        mx27vis_amp_mute = value;
        break;
    }
    return 0;
}

static int mx27vis_amp_get(struct snd_kcontrol *kcontrol,
                struct snd_ctl_elem_value *ucontrol)
{
    struct soc_mixer_control *mc =
        (struct soc_mixer_control *)kcontrol->private_value;
    unsigned int reg = mc->reg;

    switch (reg) {
    case MX27VIS_AMP_GAIN:
        ucontrol->value.integer.value[0] = mx27vis_amp_gain;
        break;
    case MX27VIS_AMP_MUTE:
        ucontrol->value.integer.value[0] = mx27vis_amp_mute;
        break;
    }
    return 0;
}

/* From 6dB to 24dB in steps of 6dB */
static const DECLARE_TLV_DB_SCALE(mx27vis_amp_tlv, 600, 600, 0);

static const struct snd_kcontrol_new mx27vis_aic32x4_controls[] = {
    SOC_DAPM_PIN_SWITCH("External Mic"),
    SOC_SINGLE_EXT_TLV("LO Ext Boost", MX27VIS_AMP_GAIN, 0, 3, 0,
               mx27vis_amp_get, mx27vis_amp_set, mx27vis_amp_tlv),
    SOC_DOUBLE_EXT("LO Ext Mute Switch", MX27VIS_AMP_MUTE, 0, 1, 1, 0,
               mx27vis_amp_get, mx27vis_amp_set),
};

static const struct snd_soc_dapm_widget aic32x4_dapm_widgets[] = {
    SND_SOC_DAPM_MIC("External Mic", NULL),
};

static const struct snd_soc_dapm_route aic32x4_dapm_routes[] = {
    {"Mic Bias", NULL, "External Mic"},
    {"IN1_R", NULL, "Mic Bias"},
    {"IN2_R", NULL, "Mic Bias"},
    {"IN3_R", NULL, "Mic Bias"},
    {"IN1_L", NULL, "Mic Bias"},
    {"IN2_L", NULL, "Mic Bias"},
    {"IN3_L", NULL, "Mic Bias"},
};

static struct snd_soc_dai_link mx27vis_aic32x4_dai = {
    .name       = "tlv320aic32x4",
    .stream_name    = "TLV320AIC32X4",
    .codec_dai_name = "tlv320aic32x4-hifi",
    .platform_name  = "imx-pcm-audio.0",
    .codec_name = "tlv320aic32x4.0-0018",
    .cpu_dai_name   = "imx-ssi.0",
    .ops        = &mx27vis_aic32x4_snd_ops,
};

static struct snd_soc_card mx27vis_aic32x4 = {
    .name       = "visstrim_m10-audio",
    .owner      = THIS_MODULE,
    .dai_link   = &mx27vis_aic32x4_dai,
    .num_links  = 1,
    .controls   = mx27vis_aic32x4_controls,
    .num_controls   = ARRAY_SIZE(mx27vis_aic32x4_controls),
    .dapm_widgets   = aic32x4_dapm_widgets,
    .num_dapm_widgets = ARRAY_SIZE(aic32x4_dapm_widgets),
    .dapm_routes    = aic32x4_dapm_routes,
    .num_dapm_routes = ARRAY_SIZE(aic32x4_dapm_routes),
};

static int __devinit mx27vis_aic32x4_probe(struct platform_device *pdev)
{
    struct snd_mx27vis_platform_data *pdata = pdev->dev.platform_data;
    int ret;

    if (!pdata) {
        dev_err(&pdev->dev, "No platform data supplied\n");
        return -EINVAL;
    }

    mx27vis_amp_gain0_gpio = pdata->amp_gain0_gpio;
    mx27vis_amp_gain1_gpio = pdata->amp_gain1_gpio;
    mx27vis_amp_mutel_gpio = pdata->amp_mutel_gpio;
    mx27vis_amp_muter_gpio = pdata->amp_muter_gpio;

    mx27vis_aic32x4.dev = &pdev->dev;
    ret = snd_soc_register_card(&mx27vis_aic32x4);
    if (ret) {
        dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
            ret);
        return ret;
    }

    /* Connect SSI0 as clock slave to SSI1 external pins */
    imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR1_SSI0,
            IMX_AUDMUX_V1_PCR_SYN |
            IMX_AUDMUX_V1_PCR_TFSDIR |
            IMX_AUDMUX_V1_PCR_TCLKDIR |
            IMX_AUDMUX_V1_PCR_TFCSEL(MX27_AUDMUX_PPCR1_SSI_PINS_1) |
            IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_PPCR1_SSI_PINS_1)
    );
    imx_audmux_v1_configure_port(MX27_AUDMUX_PPCR1_SSI_PINS_1,
            IMX_AUDMUX_V1_PCR_SYN |
            IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR1_SSI0)
    );

    return ret;
}

static int __devexit mx27vis_aic32x4_remove(struct platform_device *pdev)
{
    snd_soc_unregister_card(&mx27vis_aic32x4);

    return 0;
}

static struct platform_driver mx27vis_aic32x4_audio_driver = {
    .driver = {
        .name = "mx27vis",
        .owner = THIS_MODULE,
    },
    .probe = mx27vis_aic32x4_probe,
    .remove = __devexit_p(mx27vis_aic32x4_remove),
};

module_platform_driver(mx27vis_aic32x4_audio_driver);

MODULE_AUTHOR("Javier Martin <[email protected]>");
MODULE_DESCRIPTION("ALSA SoC AIC32X4 mx27 visstrim");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:mx27vis");