Advice on psm driver interface ?

From: Marcin Koziej (creep_at_desk.pl)
Date: 07/16/05

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    Date: Sat, 16 Jul 2005 15:03:42 +0200
To: freebsd-hackers@freebsd.org

    Hello Hackers,

    I'm playing with the psm driver and a symantics touchpad - I'd like to send the touch pressure along with x/y coordinates/buttons and then chenge the behaviour of mouse in moused using the pressure.

    What would be better:
    1. Extend the struct mousestatus with additional pressure field.
    2. Use the mousestatus's z axis movement (dz field). It in fact IS the third dimension, right? The whole concept of z being used for scrolling at times, and at times scrolling being just additional buttons is odd to me.
    3. Use another ioctl like MOUSE_SYN_GETHWINFO to fetch the pressure value.

    What would be best?

    m.

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