Author: wmb Date: 2007-10-10 02:07:12 +0200 (Wed, 10 Oct 2007) New Revision: 668
Modified: cpu/x86/pc/olpc/resume.bth Log: OLPC resume - Fixed that "reset-smbus-bitbang" code that unwedges the SMBUS, but left it commented out, because the kernel does it too.
Modified: cpu/x86/pc/olpc/resume.bth =================================================================== --- cpu/x86/pc/olpc/resume.bth 2007-10-05 18:36:19 UTC (rev 667) +++ cpu/x86/pc/olpc/resume.bth 2007-10-10 00:07:12 UTC (rev 668) @@ -340,33 +340,32 @@ [ifdef] reset-smbus-bitbang \ GPIO15 is SMB_DATA \ GPIO14 is SMB_CLOCK + h# c000 # ax mov \ Mask to set SMB_DATA and SMB_CLOCK + h# 1000 # dx mov ax dx out \ Set output values to high + h# 1004 # dx mov ax dx out \ Set pins to output h# c0000000 # ax mov \ Mask to clear SMB_DATA and SMB_CLOCK h# 1010 # dx mov ax dx out \ Deselect OUT AUX1 h# 1014 # dx mov ax dx out \ Deselect OUT AUX2 h# 1034 # dx mov ax dx out \ Deselect IN AUX1 - h# c000 # ax mov \ Mask to set SMB_DATA and SMB_CLOCK - h# 1000 # dx mov ax dx out \ Set output values to high - h# 1004 # dx mov ax dx out \ Set pins to output
- h# 1000 # dx mov \ Output value register - - 8 # cx mov \ Generate 8 low pulses on SMB_CLOCK + d# 16 # cx mov \ Generate 8 low pulses on SMB_CLOCK begin \ 5 uS delay (slightly longer for GX) rdtsc ax bx mov d# 5 d# 500 * # bx add begin rdtsc bx ax sub 0>= until
+ h# 1000 # dx mov \ Output value register h# 40000000 # ax mov ax dx out \ Clear SMB_CLOCK
\ 5 uS delay (slightly longer for GX) rdtsc ax bx mov d# 5 d# 500 * # bx add begin rdtsc bx ax sub 0>= until
+ h# 1000 # dx mov \ Output value register h# 4000 # ax mov ax dx out \ Set SMB_CLOCK - loopa
- \ 50 uS delay (slightly longer for GX) + \ 5 uS delay (slightly longer for GX) rdtsc ax bx mov d# 5 d# 500 * # bx add begin rdtsc bx ax sub 0>= until [then]