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SubjectRe: [PATCH 2.6.11] IBM TrackPoint support
On Mon, Mar 14, 2005 at 07:01:23AM -0500, Stephen Evanchik wrote:
> On Mon, 14 Mar 2005 09:19:49 +0100, Vojtech Pavlik <vojtech@suse.cz> wrote:
> > > +/*
> > > + * Mode manipulation
> > > + */
> > > +#define TP_SET_SOFT_TRANS (0x4E) /* Set mode */
> > > +#define TP_CANCEL_SOFT_TRANS (0xB9) /* Cancel mode */
> > > +#define TP_SET_HARD_TRANS (0x45) /* Mode can only be set */
> >
> > What exactly is transparent mode?
>
> Transparency mode, when enabled, turns off the TrackPoint controller's
> interpretation of the byte stream going to and coming from the
> external PS/2 port if present.
>
> Soft transparency mode can be cancelled, while hard transparency mode
> requires a reset of the device and possibly the machine.

How much does it interpret the stream in non-transparent mode? Are
commands also passed through in soft transparent mode?

I'm asking because we might want to implement a passthrough port
similarly to what the Synaptics driver does and allow extended protocol
mice to be connected to the external mouse port.

--
Vojtech Pavlik
SuSE Labs, SuSE CR
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