snd-soc-afeb9260.c

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/*
 * afeb9260.c  --  SoC audio for AFEB9260
 *
 * Copyright (C) 2009 Sergey Lapin <[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/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/platform_device.h>

#include <linux/atmel-ssc.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>

#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <linux/gpio.h>

#include "../codecs/tlv320aic23.h"
#include "atmel-pcm.h"
#include "atmel_ssc_dai.h"

#define CODEC_CLOCK     12000000

static int afeb9260_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 err;

    /* Set the codec system clock for DAC and ADC */
    err =
        snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, SND_SOC_CLOCK_IN);

    if (err < 0) {
        printk(KERN_ERR "can't set codec system clock\n");
        return err;
    }

    return err;
}

static struct snd_soc_ops afeb9260_ops = {
    .hw_params = afeb9260_hw_params,
};

static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
    SND_SOC_DAPM_HP("Headphone Jack", NULL),
    SND_SOC_DAPM_LINE("Line In", NULL),
    SND_SOC_DAPM_MIC("Mic Jack", NULL),
};

static const struct snd_soc_dapm_route afeb9260_audio_map[] = {
    {"Headphone Jack", NULL, "LHPOUT"},
    {"Headphone Jack", NULL, "RHPOUT"},

    {"LLINEIN", NULL, "Line In"},
    {"RLINEIN", NULL, "Line In"},

    {"MICIN", NULL, "Mic Jack"},
};

static int afeb9260_tlv320aic23_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_codec *codec = rtd->codec;
    struct snd_soc_dapm_context *dapm = &codec->dapm;

    snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
    snd_soc_dapm_enable_pin(dapm, "Line In");
    snd_soc_dapm_enable_pin(dapm, "Mic Jack");

    return 0;
}

/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link afeb9260_dai = {
    .name = "TLV320AIC23",
    .stream_name = "AIC23",
    .cpu_dai_name = "atmel-ssc-dai.0",
    .codec_dai_name = "tlv320aic23-hifi",
    .platform_name = "atmel_pcm-audio",
    .codec_name = "tlv320aic23-codec.0-001a",
    .init = afeb9260_tlv320aic23_init,
    .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF |
           SND_SOC_DAIFMT_CBM_CFM,
    .ops = &afeb9260_ops,
};

/* Audio machine driver */
static struct snd_soc_card snd_soc_machine_afeb9260 = {
    .name = "AFEB9260",
    .owner = THIS_MODULE,
    .dai_link = &afeb9260_dai,
    .num_links = 1,

    .dapm_widgets = tlv320aic23_dapm_widgets,
    .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
    .dapm_routes = afeb9260_audio_map,
    .num_dapm_routes = ARRAY_SIZE(afeb9260_audio_map),
};

static struct platform_device *afeb9260_snd_device;

static int __init afeb9260_soc_init(void)
{
    int err;
    struct device *dev;

    if (!(machine_is_afeb9260()))
        return -ENODEV;


    afeb9260_snd_device = platform_device_alloc("soc-audio", -1);
    if (!afeb9260_snd_device) {
        printk(KERN_ERR "ASoC: Platform device allocation failed\n");
        return -ENOMEM;
    }

    platform_set_drvdata(afeb9260_snd_device, &snd_soc_machine_afeb9260);
    err = platform_device_add(afeb9260_snd_device);
    if (err)
        goto err1;

    dev = &afeb9260_snd_device->dev;

    return 0;
err1:
    platform_device_put(afeb9260_snd_device);
    return err;
}

static void __exit afeb9260_soc_exit(void)
{
    platform_device_unregister(afeb9260_snd_device);
}

module_init(afeb9260_soc_init);
module_exit(afeb9260_soc_exit);

MODULE_AUTHOR("Sergey Lapin <[email protected]>");
MODULE_DESCRIPTION("ALSA SoC for AFEB9260");
MODULE_LICENSE("GPL");