Conexant 25821 DMA audio support

modulename: cx25821-alsa.ko

configname: CONFIG_VIDEO_CX25821_ALSA

Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Advanced Linux Sound Architecture
└─>Conexant 25821 DMA audio support
In linux kernel since version 2.6.32 (release Date: 2009-12-02)  
This is a video4linux driver for direct (DMA) audio on
Conexant 25821 based capture cards using ALSA.

It only works with boards with function 01 enabled.
To check if your board supports, use lspci -n.
If supported, you should see 14f1:8801 or 14f1:8811
PCI device.

To compile this driver as a module, choose M here: the
module will be called cx25821-alsa.

source code: