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/*++
* linux/sound/soc/codecs/wmt_hwdac.c
* WonderMedia I2S audio driver for ALSA
*
* Copyright c 2010 WonderMedia Technologies, Inc.
*
* 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, see <http://www.gnu.org/licenses/>.
*
* WonderMedia Technologies, Inc.
* 4F, 533, Chung-Cheng Road, Hsin-Tien, Taipei 231, R.O.C
--*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
/*
* Debug
*/
#define AUDIO_NAME "HW_DAC"
//#define WMT_HWDAC_DEBUG 1
//#define WMT_HWDAC_DEBUG_DETAIL 1
#ifdef WMT_HWDAC_DEBUG
#define DPRINTK(format, arg...) \
printk(KERN_INFO AUDIO_NAME ": " format "\n" , ## arg)
#else
#define DPRINTK(format, arg...) do {} while (0)
#endif
#ifdef WMT_HWDAC_DEBUG_DETAIL
#define DBG_DETAIL(format, arg...) \
printk(KERN_INFO AUDIO_NAME ": [%s]" format "\n" , __FUNCTION__, ## arg)
#else
#define DBG_DETAIL(format, arg...) do {} while (0)
#endif
#define err(format, arg...) \
printk(KERN_ERR AUDIO_NAME ": " format "\n" , ## arg)
#define info(format, arg...) \
printk(KERN_INFO AUDIO_NAME ": " format "\n" , ## arg)
#define warn(format, arg...) \
printk(KERN_WARNING AUDIO_NAME ": " format "\n" , ## arg)
extern int wmt_getsyspara(char *varname, unsigned char *varval, int *varlen);
static int hwdac_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
{
DBG_DETAIL();
return 0;
}
#define HWDAC_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | \
SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
SNDRV_PCM_RATE_96000)
#define HWDAC_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_FLOAT)
static struct snd_soc_dai_ops hwdac_dai_ops = {
.hw_params = hwdac_pcm_hw_params,
};
struct snd_soc_dai_driver hwdac_dai = {
.name = "HWDAC",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = HWDAC_RATES,
.formats = HWDAC_FORMATS,
},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2,
.rates = HWDAC_RATES,
.formats = HWDAC_FORMATS,
},
.ops = &hwdac_dai_ops,
};
static int hwdac_probe(struct snd_soc_codec *codec)
{
DBG_DETAIL();
return 0;
}
/* remove everything here */
static int hwdac_remove(struct snd_soc_codec *codec)
{
DBG_DETAIL();
return 0;
}
struct snd_soc_codec_driver soc_codec_dev_hwdac = {
.probe = hwdac_probe,
.remove = hwdac_remove,
};
static int __devinit hwdac_platform_probe(struct platform_device *pdev)
{
int ret = 0;
DBG_DETAIL();
ret = snd_soc_register_codec(&pdev->dev,
&soc_codec_dev_hwdac, &hwdac_dai, 1);
if (ret)
info("snd_soc_register_codec fail");
return ret;
}
static int __devexit hwdac_platform_remove(struct platform_device *pdev)
{
DBG_DETAIL();
snd_soc_unregister_codec(&pdev->dev);
return 0;
}
static struct platform_driver wmt_hwdac_driver = {
.driver = {
.name = "wmt-i2s-hwdac",
.owner = THIS_MODULE,
},
.probe = hwdac_platform_probe,
.remove = __devexit_p(hwdac_platform_remove),
};
static int __init wmt_hwdac_platform_init(void)
{
char buf[80];
int varlen = 80;
char codec_name[5];
int ret = 0;
DBG_DETAIL();
/*ret = wmt_getsyspara("wmt.audio.i2s", buf, &varlen);
if (ret == 0) {
sscanf(buf, "%5s", codec_name);
if (strcmp(codec_name, "hwdac")) {
info("hwdac string not found");
return -EINVAL;
}
}*/
return platform_driver_register(&wmt_hwdac_driver);
}
module_init(wmt_hwdac_platform_init);
static void __exit wmt_hwdac_platform_exit(void)
{
DBG_DETAIL();
platform_driver_unregister(&wmt_hwdac_driver);
}
module_exit(wmt_hwdac_platform_exit);
MODULE_DESCRIPTION("WMT [ALSA SoC] driver");
MODULE_AUTHOR("WonderMedia Technologies, Inc.");
MODULE_LICENSE("GPL");
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