SND_VIA8233(4)						   BSD Kernel Interfaces Manual 					    SND_VIA8233(4)

NAME

     snd_via8233 -- VIA Technologies VT8233 bridge device driver

SYNOPSIS

     To compile this driver into the kernel, place the following lines in your kernel configuration file:

	   device sound
	   device snd_via8233

     Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

	   snd_via8233_load="YES"

DESCRIPTION

     The snd_via8233 bridge driver allows the generic audio driver, sound(4), to attach to the VIA VT8233 audio devices.  These audio chipsets are
     integrated in the southbridge on many VIA based motherboards.

   Runtime Configuration
     The following sysctl(8) variables are available in addition to those available to all sound(4) devices:

	   dev.pcm.%d.polling  Experimental polling mode, where the driver operates by querying the device state on each tick using callout(9).
			       Polling is disabled by default.	Do not enable it unless you are facing weird interrupt problems or if the device
			       cannot generate interrupts at all.

HARDWARE

     The snd_via8233 driver supports the following audio chipsets:

     o	 VIA VT8233
     o	 VIA VT8233A
     o	 VIA VT8233C
     o	 VIA VT8235
     o	 VIA VT8237
     o	 VIA VT8251

SEE ALSO

     sound(4)

HISTORY

     The snd_via8233 device driver first appeared in FreeBSD 4.7.

AUTHORS

     This manual page was written by Joel Dahl <joel@FreeBSD.org>.

BUGS

     The snd_via8233 driver does not support S/PDIF.  There is partial support in the code, so implementing it should be fairly easy if the right
     hardware is available.

BSD
								 November 29, 2006							       BSD