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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:

        VIA VT8233
        VIA VT8233A
        VIA VT8233C
        VIA VT8235
        VIA VT8237
        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.