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southbridge/amd/sb700: Fix boot hang on ASUS KGPE-D16 

Change-Id: I1d7d6715663a13ab94fd6d71808e35f0f7384d00
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: http://review.coreboot.org/11938
Tested-by: build bot (Jenkins)
Reviewed-by: Peter Stuge <peter@stuge.se>
This commit is contained in:
Timothy Pearson 2015-09-05 17:46:15 -05:00 committed by Peter Stuge
parent b27dfe9998
commit 70f2736b8e
2 changed files with 12 additions and 0 deletions
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4
src/southbridge/amd/sb700/Kconfig
View File

@ -42,6 +42,10 @@ config SOUTHBRIDGE_AMD_SB700_SKIP_ISA_DMA_INIT
bool
default n
config SOUTHBRIDGE_AMD_SB700_DISABLE_ISA_DMA
bool
default n
config EHCI_BAR
hex
default 0xfef00000

8
src/southbridge/amd/sb700/early_setup.c
View File

@ -439,6 +439,14 @@ static void sb700_devices_por_init(void)
/*pci_write_config8(dev, 0x79, 0x4F); */
pci_write_config8(dev, 0x78, 0xFF);
if (IS_ENABLED(CONFIG_SOUTHBRIDGE_AMD_SB700_DISABLE_ISA_DMA)) {
printk(BIOS_DEBUG, "%s: Disabling ISA DMA support\n", __func__);
/* Disable LPC ISA DMA Capability */
byte = pci_read_config8(dev, 0x78);
byte &= ~(1 << 0);
pci_write_config8(dev, 0x78, byte);
}
/* Set smbus iospace enable, I don't know why write 0x04 into reg5 that is reserved */
pci_write_config16(dev, 0x4, 0x0407);