Re: [Qemu-devel] Absolute USB-HID device musings (was Re: VNC Terminal Server)

[Lonnie Mendez]

Brad Campbell wrote:

> Leonardo E. Reiter wrote:
>
> > This is by no means a complete patch (do not apply it as it will 
> > break usb-hid.c), but it adjusts the report descriptor in usb-hid.c 
> > to provide position in 16-bits, and in absolute coordinates:
> >
> > Index: usb-hid.c
> > ===================================================================
> > RCS file: /cvsroot/qemu/qemu/hw/usb-hid.c,v
> > retrieving revision 1.1
> > diff -a -u -r1.1 usb-hid.c
> > --- usb-hid.c   5 Nov 2005 16:57:08 -0000       1.1
> > +++ usb-hid.c   8 Apr 2006 20:56:02 -0000
> > @@ -117,7 +117,7 @@
> >      0x15, 0x00, 0x25, 0x01, 0x95, 0x03, 0x75, 0x01,
> >      0x81, 0x02, 0x95, 0x01, 0x75, 0x05, 0x81, 0x01,
> >      0x05, 0x01, 0x09, 0x30, 0x09, 0x31, 0x15, 0x81,
> > -    0x25, 0x7F, 0x75, 0x08, 0x95, 0x02, 0x81, 0x06,
> > +    0x25, 0x7F, 0x75, 0x16, 0x95, 0x02, 0x81, 0x02,
> >      0xC0, 0xC0,
> >  };
> >
> > According to: 
> > http://72.14.203.104/search?q=cache:wVYUTwc33f8J:www.usb.org/developers/devclass_docs/HID1_11.pdf+usb+hid+specification+absolute+relative&hl=en&gl=us&ct=clnk&cd=1 
>
>
> I can't get the existing usb-hid mouse to work in win2k. It sees a 
> device but it marks it as non-functional. After wrapping my head 
> around this descriptor I can't really seem to reconcile what is here 
> with the data we are passing in usb_mouse_poll()
>
> I'm sure it works with a linux guest.. has anyone had -usb -usbdevice 
> mouse working under windows ?
>
> This descriptor seems slightly whacky compared to most mouse examples 
> I've seen floating about on the net.

  Please see the patch posted yesterday to this mailing list:

http://gnome.dnsalias.net/patches/qemu-hidmousexp.patch