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nvidia/ck804/lpc.c: Fix power restoration control 

Control bits located by changing tristate power
restoration value in proprietary BIOS, booting into
Linux, dumping the entire CK804 configuration space,
then comparing values against those dumped earlier.
"Last state" control bit(s) are unknown at this time.

TEST: Boot ASUS KFSN4-DRE with both coreboot power on
and power off after power failure settings, then
pull power plug / reinsert power plug and verify
mainboard behaviour matches setting.

Change-Id: I737bdd35632fe786968a1cb8458e56c785363cfa
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: http://review.coreboot.org/8258
Tested-by: build bot (Jenkins)
Reviewed-by: Jonathan A. Kollasch <jakllsch@kollasch.net>
This commit is contained in:
Timothy Pearson 2015-01-23 20:18:19 -06:00 committed by Jonathan A. Kollasch
parent 5c4a5105d8
commit 40ce5d90b8
1 changed files with 7 additions and 3 deletions
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10
src/southbridge/nvidia/ck804/lpc.c
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@ -1,6 +1,7 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering
* Copyright (C) 2003 Linux Networx
* Copyright (C) 2003 SuSE Linux AG
* Copyright (C) 2004 Tyan Computer
@ -40,9 +41,12 @@
#define NMI_OFF 0
// 0x7a or e3
// Power restoration control register is at 0x7a
#define PREVIOUS_POWER_STATE 0x7A
// Auxiliary power control register possibly located at 0xe3
#define PREVIOUS_POWER_STATE_AUX 0xe3
#define MAINBOARD_POWER_OFF 0
#define MAINBOARD_POWER_ON 1
#define SLOW_CPU_OFF 0
@ -123,9 +127,9 @@ static void lpc_init(device_t dev)
on = CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL;
get_option(&on, "power_on_after_fail");
byte = pci_read_config8(dev, PREVIOUS_POWER_STATE);
byte &= ~0x40;
byte &= ~0x45;
if (!on)
byte |= 0x40;
byte |= 0x45;
pci_write_config8(dev, PREVIOUS_POWER_STATE, byte);
printk(BIOS_INFO, "set power %s after power fail\n", on ? "on" : "off");