[lkml]   [2010]   [Jan]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] Disable i8042 checks on Intel Apple Macs
On 01/25/2010 08:34 AM, Vojtech Pavlik wrote:
> Thus I believe that the right fix here is to figure out why the accesses
> to the ports 0x60/0x64 take a long time or forever on a Mac. Is it just
> that the kernel is timing out waiting for the i8042? Or is it something
> more sinister?

In the A20 code in the setup code, I look for 0xFF coming back and
terminate the "wait for ready" loop much sooner than for other values.
0xFF is a *possible* status value, but not a very *likely* one
(especially for repeated reads), as it would represent:

parity error + receive timeout + transmit timeout + keyboard lock +
command + selftest OK + input full + output full.


 \ /
  Last update: 2010-01-25 22:35    [W:0.117 / U:23.596 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site