Re: [linux-usb] Re: USB Device Driver Development Resources

On Fri, Mar 03, 2000 at 04:08:39PM -0500, Brad Parker wrote:

Gabriel Ricard wrote:
...

quoted

I'm looking to write a device driver for my Keyspan
USB -> Mac Serial adapter so I can attempt to use my
DeLorme GPS device under Linux (another step to aid me
in eliminating my need for MacOS). I think I posted to
this mailing list a while back asking for info, I'm
not sure.

I want to do the same.  I contacted Keyspan and they said "huh -
interesting" and I've heard nothing since.  That was 2-3 weeks ago.

The 2 port keyspan fob I have (USA28X) uses the Anchor EXUSB chip.
This means it needs code downloaded to it.  My hope was that Keyspan
would release a binary image (srecs) of their code load and we could
include it in the Linux driver.  This assumes they use a standard USB
interface to the serial ports...

There is no "standard" way to interface USB to serial. Every vendor does
it differently. You can thank Microsoft for that big problem (it's a
long story, ask me if you're curious.)

But there is a person working on a Linux driver for this device without
the help of Keyspan. His name is Brian Warner, and hopefully there will
be some code for you to play with soon (right Brian? :)

He is writing his own AnchorChip code for the device and the driver will
download it to the converter, eliminating the need to reverse engineer
Keyspan's vendor specific protocol. A very cool hack.

greg k-h
greg@kroah.com

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