Re: Adaptec USB2Xchange

On Mon, Jan 03, 2005 at 12:58:20PM -0800, Pete Carah wrote:
> I have reason to use a USB to SCSI adapter under FBSD.  I have a USB2Xchange
> from Adaptec, but (as usual for adaptec) it requires a firmware load, which 
> appears harder in usb than in PCI.  Does anyone know how to do this?  (Should 
> we have a generic firmware loader similar in concept to the ndis converter?)
> 
> A not-as-preferred alternative would be a PC card scsi unit; this won't
> work on the desktop computers, though.
> 
> For my immediate application (streaming tape) I could tolerate a userland 
> driver under ugen.  For disks this wouldn't work without a more general 
> kernel block-device structure (or a userland link back to the cam/xpt layer,
> analogous to the tunnel net driver, which couldn't be *too* hard and could 
> be desirable).
> 
> Kernel attach message is:
> ugen0: Adaptec product 0x2002, rev 2.00/1.00, addr 2
> 
> My kernel has ugen/umass/uhid/ums/ucom/uplcom/umodem compiled in, so
> this (which should show somewhere?) isn't being recognized.

As far as I know the Adaptec parts can do multiple addreses, which is
not part of umass specification.
They may use a vendor extended umass or completely different protocol.
Whatever it is - the device doesn't offer itself as beeing umass.
With vendor specs it should be simple to teach our umass driver about
this special device, even if it really isn't umass.
Also firmware uploading in USB is very simple if you have vendor specs.
Without specs all you can do is sniff Windows data and guess.

-- 
B.Walter                   BWCT                http://www.bwct.de
bernd_at_bwct.de                                  info_at_bwct.de