Index: uspace/drv/bus/usb/xhci/hw_struct/trb.h
===================================================================
--- uspace/drv/bus/usb/xhci/hw_struct/trb.h	(revision 481af21e369c3e76530d9daf68fc418b878d5b61)
+++ uspace/drv/bus/usb/xhci/hw_struct/trb.h	(revision f8315ed63bb8607a34ac1798747317e9f60d3540)
@@ -155,3 +155,48 @@
 }
 
+enum xhci_trb_completion_code {
+	XHCI_TRBC_INVALID = 0,
+	XHCI_TRBC_SUCCESS,
+	XHCI_TRBC_DATA_BUFFER_ERROR,
+	XHCI_TRBC_BABBLE_DETECTED_ERROR,
+	XHCI_TRBC_USB_TRANSACTION_ERROR,
+	XHCI_TRBC_TRB_ERROR,
+	XHCI_TRBC_STALL_ERROR,
+	XHCI_TRBC_RESOURCE_ERROR,
+	XHCI_TRBC_BANDWIDTH_ERROR,
+	XHCI_TRBC_NO_SLOTS_ERROR,
+	XHCI_TRBC_INVALID_STREAM_ERROR,
+	XHCI_TRBC_SLOT_NOT_ENABLED_ERROR,
+	XHCI_TRBC_EP_NOT_ENABLED_ERROR,
+	XHCI_TRBC_SHORT_PACKET,
+	XHCI_TRBC_RING_UNDERRUN,
+	XHCI_TRBC_RING_OVERRUN,
+	XHCI_TRBC_VF_EVENT_RING_FULL,
+	XHCI_TRBC_PARAMETER_ERROR,
+	XHCI_TRBC_BANDWIDTH_OVERRUN_ERROR,
+	XHCI_TRBC_CONTEXT_STATE_ERROR,
+	XHCI_TRBC_NO_PING_RESPONSE_ERROR,
+	XHCI_TRBC_EVENT_RING_FULL_ERROR,
+	XHCI_TRBC_INCOMPATIBLE_DEVICE_ERROR,
+	XHCI_TRBC_MISSED_SERVICE_ERROR,
+	XHCI_TRBC_COMMAND_RING_STOPPED,
+	XHCI_TRBC_COMMAND_ABORTED,
+	XHCI_TRBC_STOPPED,
+	XHCI_TRBC_STOPPED_LENGTH_INVALID,
+	XHCI_TRBC_STOPPED_SHORT_PACKET,
+	XHCI_TRBC_MAX_EXIT_LATENCY_TOO_LARGE_ERROR,
+	/* 30 reserved */
+	XHCI_TRBC_ISOCH_BUFFER_OVERRUN = 31,
+	XHCI_TRBC_EVENT_LOST_ERROR,
+	XHCI_TRBC_UNDEFINED_ERROR,
+	XHCI_TRBC_INVALID_STREAM_ID_ERROR,
+	XHCI_TRBC_SECONDARY_BANDWIDTH_ERROR,
+	XHCI_TRBC_SPLIT_TRANSACTION_ERROR
+	/**
+	 *  37 - 191 reserved
+	 * 192 - 223 vendor defined error
+	 * 224 - 255 vendor defined info
+	 */
+};
+
 #endif