Hi Neil,

On Aug 17, 2010, at 10:14 AM, Neil Leeder [off-list ref]  
wrote:

On 8/13/2010 8:54 PM, Dmitry Torokhov wrote:

quoted

Also it is not a simple coincidence that to enable device you send  
0xf4
to it (which is PSMOUSE_CMD_ENABLE - standard PS/2 command). This  
tends
to suggest that interface is not actually hidden and that the device
(touchpad) could be replaced with other kinds of devices.

Anyway, please try the driver (you  may need to hardcode the IRQ  
trigger
type for now) and see if psmouse is able to talk to the touchpad.  
If it
is then serio is the proper solution.

Dmitri,
I fixed one line in the wpce775x_serio driver which looked like a  
typo - hope I got that right:

   for (i = 0; i < count; i++)
-        serio_interrupt(ps2if->serio, ps2if->data_in[1], 0);
+        serio_interrupt(ps2if->serio, ps2if->data_in[i], 0);
   }

Yep, that was a typo.

I tried running with psmouse but it didn't work. The touchpad was  
never detected as a synaptics touchpad. I looked at the dataflow  
from the device and it wasn't responding to the commands that  
synaptics_detect() was sending it. It eventually showed up as an  
unknown logitech mouse.

That suggests that the device responds to at least basic PS/2 queries.

I can see data being passed through the serio driver but the  
logitech driver can't process it.

What about loading psmouse module with proto=bare?

Could you also dump the data received from touchpad during probing?


-- 
Dmitry