diff options
Diffstat (limited to 'ANDROID_3.4.5/sound/soc/codecs/wmt_hwdac.c')
| -rwxr-xr-x | ANDROID_3.4.5/sound/soc/codecs/wmt_hwdac.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/ANDROID_3.4.5/sound/soc/codecs/wmt_hwdac.c b/ANDROID_3.4.5/sound/soc/codecs/wmt_hwdac.c new file mode 100755 index 00000000..ae31bb5e --- /dev/null +++ b/ANDROID_3.4.5/sound/soc/codecs/wmt_hwdac.c @@ -0,0 +1,195 @@ +/*++ + * 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"); |