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

[Lonnie Mendez <lmendez19@austin.rr.com>]

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