[commit] r2983 - cpu/arm/olpc/1.75

[repository service]

Author: quozl
Date: Mon May 21 10:59:18 2012
New Revision: 2983
URL: http://tracker.coreboot.org/trac/openfirmware/changeset/2983

Log:
OLPC XO-1.75 - avoid Data Abort during preparation for Linux kernel load when a PL2303 USB serial adapter is present, by removing the device from the console multiplexor and closing it.  #11871.

Modified:
   cpu/arm/olpc/1.75/usb.fth

Modified: cpu/arm/olpc/1.75/usb.fth
==============================================================================
--- cpu/arm/olpc/1.75/usb.fth	Fri May 18 08:06:49 2012	(r2982)
+++ cpu/arm/olpc/1.75/usb.fth	Mon May 21 10:59:18 2012	(r2983)
@@ -96,6 +96,7 @@
 alias p2 probe-usb

0 value usb-keyboard-ih
+0 value usb-serial-ih

: attach-usb-keyboard  ( -- )
    " usb-keyboard" expand-alias  if   ( devspec$ )
@@ -117,19 +118,34 @@
    then
 ;

-: ?usb-keyboard  ( -- )
-   attach-usb-keyboard
+: attach-usb-serial  ( -- )
    " /usb/serial" open-dev  ?dup  if
-      add-input
+      to usb-serial-ih
+      usb-serial-ih add-input
+   then
+;
+
+: detach-usb-serial  ( -- )
+   usb-serial-ih  if
+      usb-serial-ih remove-input
+      usb-serial-ih close-dev
+      0 to usb-serial-ih
    then
 ;

+: ?usb-keyboard  ( -- )
+   attach-usb-keyboard
+   attach-usb-serial
+;
+
 : usb-quiet  ( -- )
    detach-usb-keyboard
+   detach-usb-serial
    " /usb" " reset-usb" execute-device-method drop
 ;

: suspend-usb  ( -- )
+   detach-usb-serial
    detach-usb-keyboard
    " /usb" " sleep" execute-device-method drop
 ;
@@ -145,6 +161,7 @@
    then
    silent-probe-usb
    attach-usb-keyboard
+   attach-usb-serial
 ;

\ Unlink every node whose phys.hi component matches port