+ case INPUT_STATE_ESC | INPUT_STATE_LEFTOPENBRACKET | INPUT_STATE_LEFTOPENBRACKET_2:\r
+ /*\r
+ * Here we handle the VT220 escape codes that we accept. This\r
+ * state is only used by the TTY terminal type.\r
+ */\r
+ Key.ScanCode = SCAN_NULL;\r
+ if (TerminalDevice->TerminalType == TTYTERMTYPE) {\r
+\r
+ if (UnicodeChar == '~' && TerminalDevice->TtyEscapeIndex <= 2) {\r
+ UINTN EscCode;\r
+ TerminalDevice->TtyEscapeStr[TerminalDevice->TtyEscapeIndex] = 0; /* Terminate string */\r
+ EscCode = StrDecimalToUintn(TerminalDevice->TtyEscapeStr);\r
+ switch (EscCode) {\r
+ case 3:\r
+ Key.ScanCode = SCAN_DELETE;\r
+ break;\r
+ case 11:\r
+ case 12:\r
+ case 13:\r
+ case 14:\r
+ case 15:\r
+ Key.ScanCode = SCAN_F1 + EscCode - 11;\r
+ break;\r
+ case 17:\r
+ case 18:\r
+ case 19:\r
+ case 20:\r
+ case 21:\r
+ Key.ScanCode = SCAN_F6 + EscCode - 17;\r
+ break;\r
+ case 23:\r
+ case 24:\r
+ Key.ScanCode = SCAN_F11 + EscCode - 23;\r
+ break;\r
+ default:\r
+ break;\r
+ }\r
+ } else if (TerminalDevice->TtyEscapeIndex == 1){\r
+ /* 2 character escape code */\r
+ TerminalDevice->TtyEscapeStr[TerminalDevice->TtyEscapeIndex++] = UnicodeChar;\r
+ continue;\r
+ }\r
+ else {\r
+ DEBUG ((EFI_D_ERROR, "Unexpected state in escape2\n"));\r
+ }\r
+ }\r
+ TerminalDevice->ResetState = RESET_STATE_DEFAULT;\r
+\r
+ if (Key.ScanCode != SCAN_NULL) {\r
+ Key.UnicodeChar = 0;\r
+ EfiKeyFiFoInsertOneKey (TerminalDevice, &Key);\r
+ TerminalDevice->InputState = INPUT_STATE_DEFAULT;\r
+ UnicodeToEfiKeyFlushState (TerminalDevice);\r
+ continue;\r
+ }\r
+\r
+ UnicodeToEfiKeyFlushState (TerminalDevice);\r
+ break;\r
+\r