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-rw-r--r--MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.h b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.h
index dc82811984..bf2fe00143 100644
--- a/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.h
+++ b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.h
@@ -198,8 +198,13 @@ typedef union {
//
// Hub Class Feature Selector for Clear Port Feature Request
+// It's the extension of hub class feature selector of USB 2.0 in USB 3.0 Spec.
+// For more details, Please refer to USB 3.0 Spec Table 10-7.
//
-#define Usb3PortBHPortResetChange 29
+typedef enum {
+ Usb3PortBHPortReset = 28,
+ Usb3PortBHPortResetChange = 29
+} XHC_PORT_FEATURE;
//
// Structure to map the hardware port states to the