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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>
This commit is contained in:
Patrick Georgi 2011-10-28 09:01:54 +02:00 committed by Stefan Reinauer
parent 5ed8cc0d62
commit 0f8590f9ca
1 changed files with 5 additions and 0 deletions
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5
src/southbridge/amd/sb600/usb.c
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@ -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);