sdp3430.c

Go to the documentation of this file.

/*
 * sdp3430.c  --  SoC audio for TI OMAP3430 SDP
 *
 * Author: Misael Lopez Cruz <[email protected]>
 *
 * Based on:
 * Author: Steve Sakoman <[email protected]>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * 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 St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/i2c/twl.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/jack.h>

#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <mach/gpio.h>
#include <linux/platform_data/gpio-omap.h>
#include <linux/platform_data/asoc-ti-mcbsp.h>

/* Register descriptions for twl4030 codec part */
#include <linux/mfd/twl4030-audio.h>
#include <linux/module.h>

#include "omap-mcbsp.h"
#include "omap-pcm.h"

/* TWL4030 PMBR1 Register */
#define TWL4030_INTBR_PMBR1     0x0D
/* TWL4030 PMBR1 Register GPIO6 mux bit */
#define TWL4030_GPIO6_PWM0_MUTE(value)  (value << 2)

static struct snd_soc_card snd_soc_sdp3430;

static int sdp3430_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;
    int ret;

    /* Set the codec system clock for DAC and ADC */
    ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
                        SND_SOC_CLOCK_IN);
    if (ret < 0) {
        printk(KERN_ERR "can't set codec system clock\n");
        return ret;
    }

    return 0;
}

static struct snd_soc_ops sdp3430_ops = {
    .hw_params = sdp3430_hw_params,
};

/* Headset jack */
static struct snd_soc_jack hs_jack;

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

/* Headset jack detection gpios */
static struct snd_soc_jack_gpio hs_jack_gpios[] = {
    {
        .gpio = (OMAP_MAX_GPIO_LINES + 2),
        .name = "hsdet-gpio",
        .report = SND_JACK_HEADSET,
        .debounce_time = 200,
    },
};

/* SDP3430 machine DAPM */
static const struct snd_soc_dapm_widget sdp3430_twl4030_dapm_widgets[] = {
    SND_SOC_DAPM_MIC("Ext Mic", NULL),
    SND_SOC_DAPM_SPK("Ext Spk", NULL),
    SND_SOC_DAPM_MIC("Headset Mic", NULL),
    SND_SOC_DAPM_HP("Headset Stereophone", NULL),
};

static const struct snd_soc_dapm_route audio_map[] = {
    /* External Mics: MAINMIC, SUBMIC with bias*/
    {"MAINMIC", NULL, "Mic Bias 1"},
    {"SUBMIC", NULL, "Mic Bias 2"},
    {"Mic Bias 1", NULL, "Ext Mic"},
    {"Mic Bias 2", NULL, "Ext Mic"},

    /* External Speakers: HFL, HFR */
    {"Ext Spk", NULL, "HFL"},
    {"Ext Spk", NULL, "HFR"},

    /* Headset Mic: HSMIC with bias */
    {"HSMIC", NULL, "Headset Mic Bias"},
    {"Headset Mic Bias", NULL, "Headset Mic"},

    /* Headset Stereophone (Headphone): HSOL, HSOR */
    {"Headset Stereophone", NULL, "HSOL"},
    {"Headset Stereophone", NULL, "HSOR"},
};

static int sdp3430_twl4030_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_codec *codec = rtd->codec;
    struct snd_soc_dapm_context *dapm = &codec->dapm;
    int ret;

    /* SDP3430 connected pins */
    snd_soc_dapm_enable_pin(dapm, "Ext Mic");
    snd_soc_dapm_enable_pin(dapm, "Ext Spk");
    snd_soc_dapm_disable_pin(dapm, "Headset Mic");
    snd_soc_dapm_disable_pin(dapm, "Headset Stereophone");

    /* TWL4030 not connected pins */
    snd_soc_dapm_nc_pin(dapm, "AUXL");
    snd_soc_dapm_nc_pin(dapm, "AUXR");
    snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
    snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
    snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");

    snd_soc_dapm_nc_pin(dapm, "OUTL");
    snd_soc_dapm_nc_pin(dapm, "OUTR");
    snd_soc_dapm_nc_pin(dapm, "EARPIECE");
    snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
    snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
    snd_soc_dapm_nc_pin(dapm, "CARKITL");
    snd_soc_dapm_nc_pin(dapm, "CARKITR");

    /* Headset jack detection */
    ret = snd_soc_jack_new(codec, "Headset Jack",
                SND_JACK_HEADSET, &hs_jack);
    if (ret)
        return ret;

    ret = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pins),
                hs_jack_pins);
    if (ret)
        return ret;

    ret = snd_soc_jack_add_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
                hs_jack_gpios);

    return ret;
}

static int sdp3430_twl4030_voice_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_codec *codec = rtd->codec;
    unsigned short reg;

    /* Enable voice interface */
    reg = codec->driver->read(codec, TWL4030_REG_VOICE_IF);
    reg |= TWL4030_VIF_DIN_EN | TWL4030_VIF_DOUT_EN | TWL4030_VIF_EN;
    codec->driver->write(codec, TWL4030_REG_VOICE_IF, reg);

    return 0;
}


/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link sdp3430_dai[] = {
    {
        .name = "TWL4030 I2S",
        .stream_name = "TWL4030 Audio",
        .cpu_dai_name = "omap-mcbsp.2",
        .codec_dai_name = "twl4030-hifi",
        .platform_name = "omap-pcm-audio",
        .codec_name = "twl4030-codec",
        .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
               SND_SOC_DAIFMT_CBM_CFM,
        .init = sdp3430_twl4030_init,
        .ops = &sdp3430_ops,
    },
    {
        .name = "TWL4030 PCM",
        .stream_name = "TWL4030 Voice",
        .cpu_dai_name = "omap-mcbsp.3",
        .codec_dai_name = "twl4030-voice",
        .platform_name = "omap-pcm-audio",
        .codec_name = "twl4030-codec",
        .dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_IB_NF |
               SND_SOC_DAIFMT_CBM_CFM,
        .init = sdp3430_twl4030_voice_init,
        .ops = &sdp3430_ops,
    },
};

/* Audio machine driver */
static struct snd_soc_card snd_soc_sdp3430 = {
    .name = "SDP3430",
    .owner = THIS_MODULE,
    .dai_link = sdp3430_dai,
    .num_links = ARRAY_SIZE(sdp3430_dai),

    .dapm_widgets = sdp3430_twl4030_dapm_widgets,
    .num_dapm_widgets = ARRAY_SIZE(sdp3430_twl4030_dapm_widgets),
    .dapm_routes = audio_map,
    .num_dapm_routes = ARRAY_SIZE(audio_map),
};

static struct platform_device *sdp3430_snd_device;

static int __init sdp3430_soc_init(void)
{
    int ret;
    u8 pin_mux;

    if (!machine_is_omap_3430sdp())
        return -ENODEV;
    printk(KERN_INFO "SDP3430 SoC init\n");

    sdp3430_snd_device = platform_device_alloc("soc-audio", -1);
    if (!sdp3430_snd_device) {
        printk(KERN_ERR "Platform device allocation failed\n");
        return -ENOMEM;
    }

    platform_set_drvdata(sdp3430_snd_device, &snd_soc_sdp3430);

    /* Set TWL4030 GPIO6 as EXTMUTE signal */
    twl_i2c_read_u8(TWL4030_MODULE_INTBR, &pin_mux,
                        TWL4030_INTBR_PMBR1);
    pin_mux &= ~TWL4030_GPIO6_PWM0_MUTE(0x03);
    pin_mux |= TWL4030_GPIO6_PWM0_MUTE(0x02);
    twl_i2c_write_u8(TWL4030_MODULE_INTBR, pin_mux,
                        TWL4030_INTBR_PMBR1);

    ret = platform_device_add(sdp3430_snd_device);
    if (ret)
        goto err1;

    return 0;

err1:
    printk(KERN_ERR "Unable to add platform device\n");
    platform_device_put(sdp3430_snd_device);

    return ret;
}
module_init(sdp3430_soc_init);

static void __exit sdp3430_soc_exit(void)
{
    snd_soc_jack_free_gpios(&hs_jack, ARRAY_SIZE(hs_jack_gpios),
                hs_jack_gpios);

    platform_device_unregister(sdp3430_snd_device);
}
module_exit(sdp3430_soc_exit);

MODULE_AUTHOR("Misael Lopez Cruz <[email protected]>");
MODULE_DESCRIPTION("ALSA SoC SDP3430");
MODULE_LICENSE("GPL");