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/*
* omap3beagle.c -- SoC audio for OMAP3 Beagle
*
* Author: 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
* 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/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <mach/gpio.h>
#include <plat/mcbsp.h>
#include "omap-mcbsp.h"
#include "omap-pcm.h"
static int omap3beagle_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 fmt;
int ret;
switch (params_channels(params)) {
case 2: /* Stereo I2S mode */
fmt = SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBM_CFM;
break;
case 4: /* Four channel TDM mode */
fmt = SND_SOC_DAIFMT_DSP_A |
SND_SOC_DAIFMT_IB_NF |
SND_SOC_DAIFMT_CBM_CFM;
break;
default:
return -EINVAL;
}
/* Set codec DAI configuration */
ret = snd_soc_dai_set_fmt(codec_dai, fmt);
if (ret < 0) {
printk(KERN_ERR "can't set codec DAI configuration\n");
return ret;
}
/* 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;
}
/* 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 omap3beagle_ops = {
.hw_params = omap3beagle_hw_params,
};
/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link omap3beagle_dai = {
.name = "TWL4030",
.stream_name = "TWL4030",
.cpu_dai_name = "omap-mcbsp-dai.1",
.platform_name = "omap-pcm-audio",
.codec_dai_name = "twl4030-hifi",
.codec_name = "twl4030-codec",
.ops = &omap3beagle_ops,
};
/* Audio machine driver */
static struct snd_soc_card snd_soc_omap3beagle = {
.name = "omap3beagle",
.owner = THIS_MODULE,
.dai_link = &omap3beagle_dai,
.num_links = 1,
};
static struct platform_device *omap3beagle_snd_device;
static int __init omap3beagle_soc_init(void)
{
int ret;
if (!(machine_is_omap3_beagle() || machine_is_devkit8000()))
return -ENODEV;
pr_info("OMAP3 Beagle/Devkit8000 SoC init\n");
omap3beagle_snd_device = platform_device_alloc("soc-audio", -1);
if (!omap3beagle_snd_device) {
printk(KERN_ERR "Platform device allocation failed\n");
return -ENOMEM;
}
platform_set_drvdata(omap3beagle_snd_device, &snd_soc_omap3beagle);
ret = platform_device_add(omap3beagle_snd_device);
if (ret)
goto err1;
return 0;
err1:
printk(KERN_ERR "Unable to add platform device\n");
platform_device_put(omap3beagle_snd_device);
return ret;
}
static void __exit omap3beagle_soc_exit(void)
{
platform_device_unregister(omap3beagle_snd_device);
}
module_init(omap3beagle_soc_init);
module_exit(omap3beagle_soc_exit);
MODULE_AUTHOR("Steve Sakoman <steve@sakoman.com>");
MODULE_DESCRIPTION("ALSA SoC OMAP3 Beagle");
MODULE_LICENSE("GPL");
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