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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.