Have you tried this?
http://mail-index.netbsd.org/current-users/2003/01/16/0000.html


At Tue, 11 Mar 2003 23:29:47 +0100,
theo wrote:
> On a hunch I tried my little webcam driver program on diferent computer
> with an UHCI instead of an OHCI.
> 
> It worked straight away.
> 
> I'll try to find a different computer with an OHCI to make sure that
> it's not a defective OHCI that's causing me these troubles, but it
> starts to look like the problem is in a different corner altogether.

--
IWAMOTO Toshihiro