On Wed, Sep 14, 2011 at 2:35 PM, Chris Bagwell <[email protected]> wrote:
> So I propose this long term definitions for ABS_DISTANCE:
>
> Protocol 5 - Any tool reporting ABS_DISTANCE is in distance from
> tablet (same as today).
> Protocol 4 - Only puck reports ABS_DISTANCE today and it can stay
> distance from out-of-proximity.
> Protocol Generic (Bamboo, Waltop, etc) - Right now, I only know PEN
> tool that reports it. We should standardize on distance from tablet
> or a rough approximation of that.
I just looked and I could find only 1 other driver that is reporting
ABS_DISTANCE with real distance values and that happens to be
hid-wacom.c.
It looks to me that its probably inverting the value as well to
simulate distance from tablet.
case 3: /* Mouse without wheel */
rw = 44 - (data[6] >> 2);
if (rw < 0)
rw = 0;
else if (rw > 31)
rw = 31;
input_report_abs(input, ABS_DISTANCE, rw);
The good news is that since its not reporting ABS_MISC it is
classified as Protocol Generic and aligns with above nicely. The bad
news is that xf86-input-wacom will be confused with this driver today.
We need to modify xf86-input-wacom to say:
if (PROTOCOL_4)
distance is inverted logic
else /* protocol 5 and generic here */
distance is not inverted logic.
Chris
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