Microsoft Serial Mouse not working on kdrive.

[Abhinav Duggal]

Hi all,
I am using a microsoft based serial mouse. But the mouse is not getting
detected . The driver loaded is hw/kdrive/linux/mouse.c
The same mouse is working fine on X and even microwindows.I am getting
messages
Switching to mouse protocol "logitech"
Switching to mouse protocol "ms"
Switching to mouse protocol "msc"
Switching to mouse protocol "logitech"
Switching to mouse protocol "ms"
Switching to mouse protocol "msc"
Switching to mouse protocol "logitech"
.....
......
I think the mouseValid  function is failing.I hacked a little bit ,
commented the validity check code
// i = (*km->prot->Valid) (mi, event, ne);
in MouseRead() , forced it to detect microsoft mouse and changed the state
to km->stage == MouseWorking so that the parsing  is passed.
I was able to get the mouse detected this way.But the mouse is working  in a
haphazard manner.When I move the mouse pointer there is a large movement of
the pointer in a haphazard manner.
The parsing code is modified but is doing the same thing as the previous
code except these four lines.
   if (dx > 127)
           dx -= 256;
        if (dy > 127)
           dy -= 256;
If I don't do this the pointer goes at one end and does not come
back.Thisparsing code is derived from microwindows mouse driver.


Here is the parsing code
#define TOP_FIVE_BITS           0xf8
#define BOTTOM_THREE_BITS       0x07
#define TOP_BIT                 0x80
#define SIXTH_BIT               0x40
#define BOTTOM_TWO_BITS         0x03
#define THIRD_FOURTH_BITS       0x0c
#define BOTTOM_SIX_BITS         0x3f
#define MS_LEFT_BUTTON          2
#define MS_RIGHT_BUTTON         1


static Bool msParse (KdMouseInfo *mi, unsigned char *ev, int ne)
{
    Kmouse          *km = mi->driver;
    int             dx, dy;
    unsigned long   flags;
    int left,right,buttons=0;
    left = MS_LEFT_BUTTON;
    right = MS_RIGHT_BUTTON;
     if(ev[0] & SIXTH_BIT)
    {
        buttons=(ev[0]>>4) & BOTTOM_TWO_BITS;
        dy=((ev[0] & THIRD_FOURTH_BITS) << 4);
        dx=((ev[0] & BOTTOM_TWO_BITS) << 6);
    }

        dx |= (ev[1] & BOTTOM_SIX_BITS);
        dy |= (ev[2] & BOTTOM_SIX_BITS);
        if (dx > 127)
           dx -= 256;
        if (dy > 127)
           dy -= 256;

    flags = KD_MOUSE_DELTA;
    if (buttons & left)
                flags |= KD_BUTTON_1;
    if(buttons &right)
                flags |= KD_BUTTON_3;

#if 0
    if (ev[0] & 0x20)
        flags |= KD_BUTTON_1;
    if (ev[0] & 0x10)
        flags |= KD_BUTTON_3;

    if (!MouseReasonable (mi, flags, dx, dy))
        return FALSE;
#endif

    if (km->stage == MouseWorking)
        KdEnqueueMouseEvent (mi, flags, dx, dy);
    return TRUE;
}


Please Help.Thanks.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.x.org/archives/xorg/attachments/20070504/5b62c9e1/attachment.html>