Timothy Pearson (tpearson@raptorengineeringinc.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/8258
-gerrit
commit 5ad0f5e43795ae1c4728352588daea01b64556d5 Author: Timothy Pearson tpearson@raptorengineeringinc.com Date: Fri Jan 23 20:18:19 2015 -0600
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 --- src/southbridge/nvidia/ck804/lpc.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/src/southbridge/nvidia/ck804/lpc.c b/src/southbridge/nvidia/ck804/lpc.c index 9b6049c..0c125b9 100644 --- a/src/southbridge/nvidia/ck804/lpc.c +++ b/src/southbridge/nvidia/ck804/lpc.c @@ -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 @@ -40,7 +41,7 @@
#define NMI_OFF 0
-// 0x7a or e3 +// Power restoration control register is at 0x7a #define PREVIOUS_POWER_STATE 0x7A
#define MAINBOARD_POWER_OFF 0 @@ -123,9 +124,9 @@ 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");