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authorPatrick Georgi <patrick.georgi@secunet.com>2011-10-28 09:01:54 +0200
committerStefan Reinauer <stefan.reinauer@coreboot.org>2011-10-28 22:15:19 +0200
commit0f8590f9ca8026af62efa510a1c717d2d0729e3d (patch)
treedb53047fd77fe55dfea8d5f9804d725c1b67fca4 /src/southbridge
parent5ed8cc0d62b25ee0fb014ccd8726836b1a99d87f (diff)
downloadcoreboot-0f8590f9ca8026af62efa510a1c717d2d0729e3d.tar.xz
sb600: Implement EHCI workaround
Linux implements it itself, but older Linuxes and other systems might not. Without this, the host controller might not respond to drivers. Change-Id: I4ff0e3683c02e7aa00d188428847c64c4c5d589d Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com> Reviewed-on: http://review.coreboot.org/345 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/southbridge')
-rw-r--r--src/southbridge/amd/sb600/usb.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/southbridge/amd/sb600/usb.c b/src/southbridge/amd/sb600/usb.c
index 7539f083c6..7ff8f5c9a4 100644
--- a/src/southbridge/amd/sb600/usb.c
+++ b/src/southbridge/amd/sb600/usb.c
@@ -119,6 +119,11 @@ static void usb_init2(struct device *dev)
dword &= ~(1 << 28);
pci_write_config32(dev, 0x50, dword);
+ /* EHCI Erratum (adapted from Linux) */
+ dword = pci_read_config32(dev, 0x53);
+ dword |= (1 << 3);
+ pci_write_config32(dev, 0x53, dword);
+
/* RPR5.14 Disable USB PHY PLL Reset signal to come from ACPI */
byte = pci_read_config8(dev, 0x54);
byte &= ~(1 << 0);