diff options
Diffstat (limited to 'payloads/libpayload')
| -rw-r--r-- | payloads/libpayload/drivers/usb/ohci.c | 4 |
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); |