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-rw-r--r--payloads/libpayload/drivers/usb/ohci.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/payloads/libpayload/drivers/usb/ohci.c b/payloads/libpayload/drivers/usb/ohci.c
index 2e22ecf9e7..8a01cf24fb 100644
--- a/payloads/libpayload/drivers/usb/ohci.c
+++ b/payloads/libpayload/drivers/usb/ohci.c
@@ -111,7 +111,9 @@ ohci_init (pcidev_t addr)
OHCI_INST (controller)->roothub = controller->devices[0];
controller->bus_address = addr;
- controller->reg_base = pci_read_config32 (controller->bus_address, 0x10); // OHCI mandates MMIO, so bit 0 is clear
+ /* regarding OHCI spec, Appendix A, BAR_OCHI register description, Table A-4
+ * BASE ADDRESS only [31-12] bits. All other usually 0, but not all */
+ controller->reg_base = pci_read_config32 (controller->bus_address, 0x10) & 0xfffff000; // OHCI mandates MMIO, so bit 0 is clear
OHCI_INST (controller)->opreg = (opreg_t*)phys_to_virt(controller->reg_base);
printf("OHCI Version %x.%x\n", (OHCI_INST (controller)->opreg->HcRevision >> 4) & 0xf, OHCI_INST (controller)->opreg->HcRevision & 0xf);