SGI HAL2 Audio

modulename: snd-sgi-hal2.ko

configname: CONFIG_SND_SGI_HAL2

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>MIPS sound devices
└─>SGI HAL2 Audio
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
Sound support for the SGI Indy and Indigo2 Workstation.

source code: