Re: input subsystem config ?

[Stelian Pop]

On Thu, Jul 18, 2002 at 05:31:32PM +0200, Vojtech Pavlik wrote:

> > > Ok, that's what I wanted to know - I was wondering whether the mouse
> > > would simply ignore all control commands. And it doesn't not. It needs
> > > the commands, 
[...]

Ok, I've finally found out what's happenning: in i8042_aux_write()
you restore the CTR value each time. For some obscure reasons, my
laptop's controller does not like this at all. Disabling this
section makes the mouse function perfectly.

Is this CTR restore command really needed ? If it is, we should
probably add an option like "i8042_noctrrestore=1" to the i8042
driver...

Or maybe you have a better idea...

Stelian.

===== drivers/input/serio/i8042.c 1.5 vs edited =====
--- 1.5/drivers/input/serio/i8042.c	Sat Jul 13 20:31:00 2002
+++ edited/drivers/input/serio/i8042.c	Fri Jul 19 15:36:09 2002
@@ -221,12 +221,16 @@
 
 	retval  = i8042_command(&c, I8042_CMD_AUX_SEND);
 
+#if 0
 /*
  * Here we restore the CTR value. I don't know why, but i8042's in half-AT
  * mode tend to trash their CTR when doing the AUX_SEND command.
+ *
+ * However, for some reasons this breaks (at least) my Sony VAIO C1VE
+ * aux interface.
  */
-
 	retval |= i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR);
+#endif
 
 /*
  * Make sure the interrupt happens and the character is received even
-- 
Stelian Pop <[e-mail]>
Alcove - http://www.alcove.com