Need to clear downstream read cycle retry bit, or the bus scan will hang.
Signed-off-by: Tobias Diedrich ranma+coreboot@tdiedrich.de
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Index: src/southbridge/via/k8t890/k8t890_pcie.c =================================================================== --- src.orig/southbridge/via/k8t890/k8t890_pcie.c 2010-10-27 11:34:19.000000000 +0200 +++ src/southbridge/via/k8t890/k8t890_pcie.c 2010-10-27 12:45:22.000000000 +0200 @@ -35,6 +41,13 @@ reg = pci_read_config8(dev, 0x50); pci_write_config8(dev, 0x50, reg | 0x10);
+ /* + * Disable downstream read cycle retry, + * needed for asus m2v / k8t890cf or bus scan will hang. + */ + reg = pci_read_config8(dev, 0xa3); + pci_write_config8(dev, 0xa3, reg & ~0x01); + /* Award has 0xb, VIA recomends 0x4. */ pci_write_config8(dev, 0xe1, 0xb);
@@ -75,6 +88,13 @@ reg = pci_read_config8(dev, 0x50); pci_write_config8(dev, 0x50, reg | 0x10);
+ /* + * Disable downstream read cycle retry, + * needed for asus m2v / k8t890cf or bus scan will hang. + */ + reg = pci_read_config8(dev, 0xa3); + pci_write_config8(dev, 0xa3, reg & ~0x01); + /* Award has 0xb, VIA recommends 0x4. */ pci_write_config8(dev, 0xe1, 0xb); /* Set replay timer limit. */