Porting old FreeBSD USB driver to new stack

[Tom Evans]

Hi all

I have a rare USB device - an imon integrated VFD/IR receiver - which
fortunately has a FreeBSD driver.

Less fortunately, the driver is for 6.2, and so is 'old usb':

http://aopopov.home.xs4all.nl/imon/imon.html

Does anyone know of some good documentation describing the changes, or
a simple sample driver from each version that I can look at to try and
get started porting this to the newer stack?

Thanks in advance

Tom