On Sat, Jun 01, 2002 at 01:03:55PM +0200, Vojtech Pavlik wrote:
> On Sat, Jun 01, 2002 at 01:02:23PM +0300, Johann Deneux wrote:
> > Vojtech Pavlik wrote:
> > > On Mon, May 27, 2002 at 01:17:58PM +0200, Johann Deneux wrote:
> > > 
> > >>Johannes Erdfelt wrote:
> > >>
> > >>
> > >>>
> > >>>I can only see 2 reasons for putting it into the HCD: OHCI and EHCI
> > >>>handle it implicitily and for speed.
> > >>>
> > >>>There is a strong desire to keep bulk fast, but I can't come up with a
> > >>>reason for control to be faster.
> > >>>
> > >>>
> > >>It depends on what you mean by fast. I am trying to write a driver for a 
> > >>device that needs control messages to be sent often (every 0.1s or 0.01s 
> > >>or so).
> > >>
> > > 
> > > Doesn't the device have an output endpoint for that?
> > > 
> > 
> > The device is an hid device using Logitech's home-made protocol for 
> > force-feedback. It indeed has an output endpoint, but AFAIK it uses 
> > control messages to handle force-feedback.
> 
> I think using the interrupt out endpoint will work equally well. Anyway,
> I think force feedback is the only reason to add an out endpoint to a
> mouse.

You may even be able to use the functions hid-core.c provides for that ...

-- 
Vojtech Pavlik
SuSE Labs

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