On Tue, Oct 09, 2001 at 10:20:39PM -0700, Greg KH wrote:
> On Tue, Oct 09, 2001 at 10:20:11AM -0700, Jean Tourrilhes wrote:
> > I just have a few comments...
> > 1) There is more USB-IrDA devices than those you list in the
> > driver, and most IrDA-USB devices don't follow the spec in some way or
> > another. Please check .../drivers/net/irda/irda-usb.c for the gory
> > details...
>
> I know. I only had access to that one device. I'll be patching the
> driver for the other devices soon.
Yes, I forgot to mention : the 3 devices listed in irda-usb
are based on the same chip/firmware and have the same bug.
> > 3) The Linux-IrDA stack already allow you to talk to embedded
> > devices with no IrDA support. This is called the Ultra protocol (very
> > simple, no handshake, no management frames). I can give you some
> > examples if you want...
>
> Pointers to this would be great, thanks.
e-Squirt is an example of application that use Ultra.
On my page, you will find the very old version of Ultra
e-Squirt, that will show you how to program Ultra on Linux :
http://www.hpl.hp.com/personal/Jean_Tourrilhes/IrDA/squirt.html
For other platforms, and for the description of our hardware
beacons using Ultra, check the CVS :
http://www.cooltown.hp.com/dev/
The only public Ultra spec is part of the IrWW package (but I
have a different Ultra spec on my hard drive) :
http://www.irda.org/standards/specifications.asp
And I believe that if Ultra is too limited for what you want
to do, chances are that you will end up with something similar to
IrDA-lite.
> > 4) You forgot to use USB_ZERO_PACKET. A bit of testing would
> > have shown you that this is necessary. Why do you think I spent so
> > much time bothering this list about it ;-)
>
> Ah, I don't see how I missed that one. Thanks a lot for the pointer.
> My testing was very minimal.
;-)
> greg k-h
Regards,
Jean
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