diff options
Diffstat (limited to 'SourceLevelDebugPkg')
| -rw-r--r-- | SourceLevelDebugPkg/Library/DebugCommunicationLibUsb/DebugCommunicationLibUsb.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb/DebugCommunicationLibUsb.c b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb/DebugCommunicationLibUsb.c index 7fb671eb4b..567e06c9d3 100644 --- a/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb/DebugCommunicationLibUsb.c +++ b/SourceLevelDebugPkg/Library/DebugCommunicationLibUsb/DebugCommunicationLibUsb.c @@ -164,9 +164,29 @@ CalculateUsbDebugPortBar ( )
{
UINT16 PciStatus;
+ UINT16 VendorId;
+ UINT16 DeviceId;
+ UINT8 ProgInterface;
+ UINT8 SubClassCode;
+ UINT8 BaseCode;
UINT8 CapabilityPtr;
UINT8 CapabilityId;
+ VendorId = PciRead16 (PcdGet32(PcdUsbEhciPciAddress) + PCI_VENDOR_ID_OFFSET);
+ DeviceId = PciRead16 (PcdGet32(PcdUsbEhciPciAddress) + PCI_DEVICE_ID_OFFSET);
+
+ if ((VendorId == 0xFFFF) || (DeviceId == 0xFFFF)) {
+ return RETURN_UNSUPPORTED;
+ }
+
+ ProgInterface = PciRead8 (PcdGet32(PcdUsbEhciPciAddress) + PCI_CLASSCODE_OFFSET);
+ SubClassCode = PciRead8 (PcdGet32(PcdUsbEhciPciAddress) + PCI_CLASSCODE_OFFSET + 1);
+ BaseCode = PciRead8 (PcdGet32(PcdUsbEhciPciAddress) + PCI_CLASSCODE_OFFSET + 2);
+
+ if ((ProgInterface != PCI_IF_EHCI) || (SubClassCode != PCI_CLASS_SERIAL_USB) || (BaseCode != PCI_CLASS_SERIAL)) {
+ return RETURN_UNSUPPORTED;
+ }
+
//
// Enable Ehci Host Controller MMIO Space.
//
@@ -1068,7 +1088,7 @@ DebugPortInitialize ( Status = CalculateUsbDebugPortBar(&Handle.DebugPortOffset, &Handle.DebugPortBarNumber);
if (RETURN_ERROR (Status)) {
- DEBUG ((EFI_D_ERROR, "USB Debug Port: EHCI host controller does not support debug port capability!\n"));
+ DEBUG ((EFI_D_ERROR, "USB Debug Port: the pci device pointed by PcdUsbEhciPciAddress is not EHCI host controller or does not support debug port capability!\n"));
goto Exit;
}
|