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/*
* Copyright (C) 2011 John Ogness
* Author: John Ogness <john.ogness@linutronix.de>
*
* based on sound/soc/omap/omap3beagle.c by
* Steve Sakoman <steve@sakoman.com>
*
* 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 version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
* whether express or implied; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#include <linux/platform_device.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include "omap-mcbsp.h"
#include "omap-pcm.h"
#include "../codecs/si47xx.h"
static int gta04_fm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
/* setup codec dai and cpu dai hardware params */
struct snd_soc_pcm_runtime *rtd = substream->private_data;
// struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
unsigned int fmt;
int ret;
fmt = SND_SOC_DAIFMT_I2S | // I2S
SND_SOC_DAIFMT_IB_IF | // positive sync pulse, driven on rising, sampled on falling clock
SND_SOC_DAIFMT_CBM_CFM; // clocks come from FM tuner
/* Set cpu DAI configuration */
ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
if (ret < 0) {
printk(KERN_ERR "can't set cpu DAI configuration\n");
return ret;
}
ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKX_EXT, 0,
SND_SOC_CLOCK_IN);
// FIXME: set clock divisor
if (ret < 0) {
printk(KERN_ERR "can't set cpu system clock\n");
return ret;
}
return 0;
}
static int gta04_fm_init(struct snd_soc_pcm_runtime *runtime)
{
/* add controls */
/* add routes */
/* setup pins */
struct snd_soc_codec *codec = runtime->codec;
snd_soc_dapm_sync(&codec->dapm);
return 0;
}
static int gta04_fm_startup(struct snd_pcm_substream *substream)
{
/* enable clock used by codec */
return 0;
}
static void gta04_fm_shutdown(struct snd_pcm_substream *substream)
{
/* disable clock used by codec */
}
static struct snd_soc_ops gta04_fm_ops = {
.startup = gta04_fm_startup,
.hw_params = gta04_fm_hw_params,
.shutdown = gta04_fm_shutdown,
};
/* digital fm interface glue - connects codec <--> cpu */
static struct snd_soc_dai_link gta04_fm_dai = {
.name = "Si47xx",
.stream_name = "Si47xx",
.cpu_dai_name = "omap-mcbsp-dai.0",
.platform_name = "omap-pcm-audio",
.codec_dai_name = "Si47xx",
.init = gta04_fm_init,
.ops = >a04_fm_ops,
};
/* fm machine driver */
static struct snd_soc_card gta04_fm_card = {
.name = "gta04-fm",
.dai_link = >a04_fm_dai,
.num_links = 1,
};
/* fm subsystem */
static struct si47xx_setup_data gta04_fm_soc_data = {
.i2c_bus = 2,
.i2c_address = 0x11,
};
static struct snd_soc_device gta04_fm_devdata = {
.card = >a04_fm_card,
.codec_dev = &soc_codec_dev_si47xx,
.codec_data = >a04_fm_soc_data,
};
static struct platform_device *gta04_fm_snd_device;
static int __init gta04_fm_soc_init(void)
{
struct device *dev;
int ret;
pr_info("gta04-fm SoC init\n");
gta04_fm_snd_device = platform_device_alloc("soc-audio", 3);
if (!gta04_fm_snd_device) {
printk(KERN_ERR "platform device allocation failed\n");
return -ENOMEM;
}
dev = >a04_fm_snd_device->dev;
platform_set_drvdata(gta04_fm_snd_device, >a04_fm_card);
ret = platform_device_add(gta04_fm_snd_device);
if (ret) {
printk(KERN_ERR "unable to add platform device\n");
platform_device_put(gta04_fm_snd_device);
}
return ret;
}
static void __exit gta04_fm_soc_exit(void)
{
platform_device_unregister(gta04_fm_snd_device);
}
module_init(gta04_fm_soc_init);
module_exit(gta04_fm_soc_exit);
MODULE_AUTHOR("John Ogness <john.ogness@linutronix.de>");
MODULE_DESCRIPTION("ALSA SoC GTA04 FM");
MODULE_LICENSE("GPL v2");
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