Au1x00 AC97 Port Driver

modulename: snd-au1x00.ko

configname: CONFIG_SND_AU1X00

Linux Kernel Configuration
└─>Device Drivers
└─>Sound
└─>Advanced Linux Sound Architecture
└─>ALSA MIPS devices
└─>Au1x00 AC97 Port Driver
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
ALSA Sound driver for the Au1x00's AC97 port.

source code:
sound/mips/