MdeModulePkg/Universal/Console/TerminalDxe/Terminal.h

   1 /** @file
   2   Header file for Terminal driver.
   3
   4 Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
   5 This program and the accompanying materials
   6 are licensed and made available under the terms and conditions of the BSD License
   7 which accompanies this distribution.  The full text of the license may be found at
   8 http://opensource.org/licenses/bsd-license.php
   9
  10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #ifndef _TERMINAL_H_
  16 #define _TERMINAL_H_
  17
  18
  19 #include <Uefi.h>
  20
  21 #include <Guid/GlobalVariable.h>
  22 #include <Guid/PcAnsi.h>
  23
  24 #include <Protocol/SimpleTextOut.h>
  25 #include <Protocol/SerialIo.h>
  26 #include <Protocol/DevicePath.h>
  27 #include <Protocol/SimpleTextIn.h>
  28 #include <Protocol/SimpleTextInEx.h>
  29
  30 #include <Library/DebugLib.h>
  31 #include <Library/UefiDriverEntryPoint.h>
  32 #include <Library/UefiLib.h>
  33 #include <Library/ReportStatusCodeLib.h>
  34 #include <Library/BaseMemoryLib.h>
  35 #include <Library/MemoryAllocationLib.h>
  36 #include <Library/UefiBootServicesTableLib.h>
  37 #include <Library/UefiRuntimeServicesTableLib.h>
  38 #include <Library/DevicePathLib.h>
  39 #include <Library/PcdLib.h>
  40 #include <Library/BaseLib.h>
  41
  42
  43 #define RAW_FIFO_MAX_NUMBER 256
  44 #define FIFO_MAX_NUMBER     128
  45
  46 typedef struct {
  47   UINT8 Head;
  48   UINT8 Tail;
  49   UINT8 Data[RAW_FIFO_MAX_NUMBER + 1];
  50 } RAW_DATA_FIFO;
  51
  52 typedef struct {
  53   UINT8   Head;
  54   UINT8   Tail;
  55   UINT16  Data[FIFO_MAX_NUMBER + 1];
  56 } UNICODE_FIFO;
  57
  58 typedef struct {
  59   UINT8         Head;
  60   UINT8         Tail;
  61   EFI_INPUT_KEY Data[FIFO_MAX_NUMBER + 1];
  62 } EFI_KEY_FIFO;
  63
  64 #define KEYBOARD_TIMER_INTERVAL         200000  // 0.02s
  65
  66 #define TERMINAL_DEV_SIGNATURE  SIGNATURE_32 ('t', 'm', 'n', 'l')
  67
  68 #define TERMINAL_CONSOLE_IN_EX_NOTIFY_SIGNATURE SIGNATURE_32 ('t', 'm', 'e', 'n')
  69
  70 typedef struct _TERMINAL_CONSOLE_IN_EX_NOTIFY {
  71   UINTN                                 Signature;
  72   EFI_HANDLE                            NotifyHandle;
  73   EFI_KEY_DATA                          KeyData;
  74   EFI_KEY_NOTIFY_FUNCTION               KeyNotificationFn;
  75   LIST_ENTRY                            NotifyEntry;
  76 } TERMINAL_CONSOLE_IN_EX_NOTIFY;
  77 typedef struct {
  78   UINTN                               Signature;
  79   EFI_HANDLE                          Handle;
  80   UINT8                               TerminalType;
  81   EFI_SERIAL_IO_PROTOCOL              *SerialIo;
  82   EFI_DEVICE_PATH_PROTOCOL            *DevicePath;
  83   EFI_SIMPLE_TEXT_INPUT_PROTOCOL      SimpleInput;
  84   EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL     SimpleTextOutput;
  85   EFI_SIMPLE_TEXT_OUTPUT_MODE         SimpleTextOutputMode;
  86   UINTN                               SerialInTimeOut;
  87   RAW_DATA_FIFO                       *RawFiFo;
  88   UNICODE_FIFO                        *UnicodeFiFo;
  89   EFI_KEY_FIFO                        *EfiKeyFiFo;
  90   EFI_UNICODE_STRING_TABLE            *ControllerNameTable;
  91   EFI_EVENT                           TimerEvent;
  92   EFI_EVENT                           TwoSecondTimeOut;
  93   UINT32                              InputState;
  94   UINT32                              ResetState;
  95
  96   //
  97   // Esc could not be output to the screen by user,
  98   // but the terminal driver need to output it to
  99   // the terminal emulation software to send control sequence.
 100   // This boolean is used by the terminal driver only
 101   // to indicate whether the Esc could be sent or not.
 102   //
 103   BOOLEAN                             OutputEscChar;
 104   EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL   SimpleInputEx;
 105   LIST_ENTRY                          NotifyList;
 106 } TERMINAL_DEV;
 107
 108 #define INPUT_STATE_DEFAULT               0x00
 109 #define INPUT_STATE_ESC                   0x01
 110 #define INPUT_STATE_CSI                   0x02
 111 #define INPUT_STATE_LEFTOPENBRACKET       0x04
 112 #define INPUT_STATE_O                     0x08
 113 #define INPUT_STATE_2                     0x10
 114
 115 #define RESET_STATE_DEFAULT               0x00
 116 #define RESET_STATE_ESC_R                 0x01
 117 #define RESET_STATE_ESC_R_ESC_R           0x02
 118
 119 #define TERMINAL_CON_IN_DEV_FROM_THIS(a)  CR (a, TERMINAL_DEV, SimpleInput, TERMINAL_DEV_SIGNATURE)
 120 #define TERMINAL_CON_OUT_DEV_FROM_THIS(a) CR (a, TERMINAL_DEV, SimpleTextOutput, TERMINAL_DEV_SIGNATURE)
 121 #define TERMINAL_CON_IN_EX_DEV_FROM_THIS(a)  CR (a, TERMINAL_DEV, SimpleInputEx, TERMINAL_DEV_SIGNATURE)
 122
 123 typedef union {
 124   UINT8 Utf8_1;
 125   UINT8 Utf8_2[2];
 126   UINT8 Utf8_3[3];
 127 } UTF8_CHAR;
 128
 129 #define PCANSITYPE                0
 130 #define VT100TYPE                 1
 131 #define VT100PLUSTYPE             2
 132 #define VTUTF8TYPE                3
 133
 134 #define LEFTOPENBRACKET           0x5b  // '['
 135 #define ACAP                      0x41
 136 #define BCAP                      0x42
 137 #define CCAP                      0x43
 138 #define DCAP                      0x44
 139
 140 #define MODE0_COLUMN_COUNT        80
 141 #define MODE0_ROW_COUNT           25
 142
 143 #define MODE1_COLUMN_COUNT        80
 144 #define MODE1_ROW_COUNT           50
 145
 146 #define MODE2_COLUMN_COUNT        100
 147 #define MODE2_ROW_COUNT           31
 148
 149 //
 150 // MODE3 is defined by PcdConOutColumn & PcdConOutRow
 151 //
 152
 153 #define TERMINAL_MAX_MODE 4
 154
 155 #define BACKSPACE                 8
 156 #define ESC                       27
 157 #define CSI                       0x9B
 158 #define DEL                       127
 159 #define BRIGHT_CONTROL_OFFSET     2
 160 #define FOREGROUND_CONTROL_OFFSET 6
 161 #define BACKGROUND_CONTROL_OFFSET 11
 162 #define ROW_OFFSET                2
 163 #define COLUMN_OFFSET             5
 164
 165 typedef struct {
 166   UINT16  Unicode;
 167   CHAR8   PcAnsi;
 168   CHAR8   Ascii;
 169 } UNICODE_TO_CHAR;
 170
 171 //
 172 // Global Variables
 173 //
 174 extern EFI_DRIVER_BINDING_PROTOCOL   gTerminalDriverBinding;
 175 extern EFI_COMPONENT_NAME_PROTOCOL   gTerminalComponentName;
 176 extern EFI_COMPONENT_NAME2_PROTOCOL  gTerminalComponentName2;
 177
 178 /**
 179   The user Entry Point for module Terminal. The user code starts with this function.
 180
 181   @param[in] ImageHandle    The firmware allocated handle for the EFI image.
 182   @param[in] SystemTable    A pointer to the EFI System Table.
 183
 184   @retval EFI_SUCCESS       The entry point is executed successfully.
 185   @retval other             Some error occurs when executing this entry point.
 186
 187 **/
 188 EFI_STATUS
 189 EFIAPI
 190 InitializeTerminal (
 191   IN EFI_HANDLE         ImageHandle,
 192   IN EFI_SYSTEM_TABLE   *SystemTable
 193   );
 194
 195 /**
 196   Implements EFI_SIMPLE_TEXT_INPUT_PROTOCOL.Reset().
 197   This driver only perform dependent serial device reset regardless of
 198   the value of ExtendeVerification
 199
 200   @param  This                     Indicates the calling context.
 201   @param  ExtendedVerification     Skip by this driver.
 202
 203   @retval EFI_SUCCESS              The reset operation succeeds.
 204   @retval EFI_DEVICE_ERROR         The dependent serial port reset fails.
 205
 206 **/
 207 EFI_STATUS
 208 EFIAPI
 209 TerminalConInReset (
 210   IN  EFI_SIMPLE_TEXT_INPUT_PROTOCOL    *This,
 211   IN  BOOLEAN                           ExtendedVerification
 212   );
 213
 214
 215 /**
 216   Implements EFI_SIMPLE_TEXT_INPUT_PROTOCOL.ReadKeyStroke().
 217
 218   @param  This                Indicates the calling context.
 219   @param  Key                 A pointer to a buffer that is filled in with the
 220                               keystroke information for the key that was sent
 221                               from terminal.
 222
 223   @retval EFI_SUCCESS         The keystroke information is returned successfully.
 224   @retval EFI_NOT_READY       There is no keystroke data available.
 225   @retval EFI_DEVICE_ERROR    The dependent serial device encounters error.
 226
 227 **/
 228 EFI_STATUS
 229 EFIAPI
 230 TerminalConInReadKeyStroke (
 231   IN  EFI_SIMPLE_TEXT_INPUT_PROTOCOL  *This,
 232   OUT EFI_INPUT_KEY                   *Key
 233   );
 234
 235 /**
 236   Check if the key already has been registered.
 237
 238   @param  RegsiteredData           A pointer to a buffer that is filled in with the
 239                                    keystroke state data for the key that was
 240                                    registered.
 241   @param  InputData                A pointer to a buffer that is filled in with the
 242                                    keystroke state data for the key that was
 243                                    pressed.
 244
 245   @retval TRUE                     Key be pressed matches a registered key.
 246   @retval FLASE                    Match failed.
 247
 248 **/
 249 BOOLEAN
 250 IsKeyRegistered (
 251   IN EFI_KEY_DATA  *RegsiteredData,
 252   IN EFI_KEY_DATA  *InputData
 253   );
 254
 255 /**
 256   Event notification function for EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL.WaitForKeyEx event
 257   Signal the event if there is key available
 258
 259   @param  Event                    Indicates the event that invoke this function.
 260   @param  Context                  Indicates the calling context.
 261
 262 **/
 263 VOID
 264 EFIAPI
 265 TerminalConInWaitForKeyEx (
 266   IN  EFI_EVENT       Event,
 267   IN  VOID            *Context
 268   );
 269
 270 //
 271 // Simple Text Input Ex protocol prototypes
 272 //
 273
 274 /**
 275   Reset the input device and optionally run diagnostics
 276
 277   @param  This                     Protocol instance pointer.
 278   @param  ExtendedVerification     Driver may perform diagnostics on reset.
 279
 280   @retval EFI_SUCCESS              The device was reset.
 281   @retval EFI_DEVICE_ERROR         The device is not functioning properly and could
 282                                    not be reset.
 283
 284 **/
 285 EFI_STATUS
 286 EFIAPI
 287 TerminalConInResetEx (
 288   IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL  *This,
 289   IN BOOLEAN                            ExtendedVerification
 290   );
 291
 292 /**
 293   Reads the next keystroke from the input device. The WaitForKey Event can
 294   be used to test for existence of a keystroke via WaitForEvent () call.
 295
 296   @param  This                     Protocol instance pointer.
 297   @param  KeyData                  A pointer to a buffer that is filled in with the
 298                                    keystroke state data for the key that was
 299                                    pressed.
 300
 301   @retval EFI_SUCCESS              The keystroke information was returned.
 302   @retval EFI_NOT_READY            There was no keystroke data available.
 303   @retval EFI_DEVICE_ERROR         The keystroke information was not returned due
 304                                    to hardware errors.
 305   @retval EFI_INVALID_PARAMETER    KeyData is NULL.
 306
 307 **/
 308 EFI_STATUS
 309 EFIAPI
 310 TerminalConInReadKeyStrokeEx (
 311   IN  EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *This,
 312   OUT EFI_KEY_DATA                      *KeyData
 313   );
 314
 315 /**
 316   Set certain state for the input device.
 317
 318   @param  This                     Protocol instance pointer.
 319   @param  KeyToggleState           A pointer to the EFI_KEY_TOGGLE_STATE to set the
 320                                    state for the input device.
 321
 322   @retval EFI_SUCCESS              The device state was set successfully.
 323   @retval EFI_DEVICE_ERROR         The device is not functioning correctly and
 324                                    could not have the setting adjusted.
 325   @retval EFI_UNSUPPORTED          The device does not have the ability to set its
 326                                    state.
 327   @retval EFI_INVALID_PARAMETER    KeyToggleState is NULL.
 328
 329 **/
 330 EFI_STATUS
 331 EFIAPI
 332 TerminalConInSetState (
 333   IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL  *This,
 334   IN EFI_KEY_TOGGLE_STATE               *KeyToggleState
 335   );
 336
 337 /**
 338   Register a notification function for a particular keystroke for the input device.
 339
 340   @param  This                     Protocol instance pointer.
 341   @param  KeyData                  A pointer to a buffer that is filled in with the
 342                                    keystroke information data for the key that was
 343                                    pressed.
 344   @param  KeyNotificationFunction  Points to the function to be called when the key
 345                                    sequence is typed specified by KeyData.
 346   @param  NotifyHandle             Points to the unique handle assigned to the
 347                                    registered notification.
 348
 349   @retval EFI_SUCCESS              The notification function was registered
 350                                    successfully.
 351   @retval EFI_OUT_OF_RESOURCES     Unable to allocate resources for necesssary data
 352                                    structures.
 353   @retval EFI_INVALID_PARAMETER    KeyData or NotifyHandle is NULL.
 354
 355 **/
 356 EFI_STATUS
 357 EFIAPI
 358 TerminalConInRegisterKeyNotify (
 359   IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL  *This,
 360   IN EFI_KEY_DATA                       *KeyData,
 361   IN EFI_KEY_NOTIFY_FUNCTION            KeyNotificationFunction,
 362   OUT EFI_HANDLE                        *NotifyHandle
 363   );
 364
 365 /**
 366   Remove a registered notification function from a particular keystroke.
 367
 368   @param  This                     Protocol instance pointer.
 369   @param  NotificationHandle       The handle of the notification function being
 370                                    unregistered.
 371
 372   @retval EFI_SUCCESS              The notification function was unregistered
 373                                    successfully.
 374   @retval EFI_INVALID_PARAMETER    The NotificationHandle is invalid.
 375   @retval EFI_NOT_FOUND            Can not find the matching entry in database.
 376
 377 **/
 378 EFI_STATUS
 379 EFIAPI
 380 TerminalConInUnregisterKeyNotify (
 381   IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL  *This,
 382   IN EFI_HANDLE                         NotificationHandle
 383   );
 384
 385 /**
 386   Event notification function for EFI_SIMPLE_TEXT_INPUT_PROTOCOL.WaitForKey event
 387   Signal the event if there is key available
 388
 389   @param  Event                    Indicates the event that invoke this function.
 390   @param  Context                  Indicates the calling context.
 391
 392 **/
 393 VOID
 394 EFIAPI
 395 TerminalConInWaitForKey (
 396   IN  EFI_EVENT     Event,
 397   IN  VOID          *Context
 398   );
 399
 400 /**
 401   Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.Reset().
 402   If ExtendeVerification is TRUE, then perform dependent serial device reset,
 403   and set display mode to mode 0.
 404   If ExtendedVerification is FALSE, only set display mode to mode 0.
 405
 406   @param  This                  Indicates the calling context.
 407   @param  ExtendedVerification  Indicates that the driver may perform a more
 408                                 exhaustive verification operation of the device
 409                                 during reset.
 410
 411   @retval EFI_SUCCESS           The reset operation succeeds.
 412   @retval EFI_DEVICE_ERROR      The terminal is not functioning correctly or the serial port reset fails.
 413
 414 **/
 415 EFI_STATUS
 416 EFIAPI
 417 TerminalConOutReset (
 418   IN  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL    *This,
 419   IN  BOOLEAN                            ExtendedVerification
 420   );
 421
 422 /**
 423   Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.OutputString().
 424   The Unicode string will be converted to terminal expressible data stream
 425   and send to terminal via serial port.
 426
 427   @param  This                    Indicates the calling context.
 428   @param  WString                 The Null-terminated Unicode string to be displayed
 429                                   on the terminal screen.
 430
 431   @retval EFI_SUCCESS             The string is output successfully.
 432   @retval EFI_DEVICE_ERROR        The serial port fails to send the string out.
 433   @retval EFI_WARN_UNKNOWN_GLYPH  Indicates that some of the characters in the Unicode string could not
 434                                   be rendered and are skipped.
 435   @retval EFI_UNSUPPORTED         If current display mode is out of range.
 436
 437 **/
 438 EFI_STATUS
 439 EFIAPI
 440 TerminalConOutOutputString (
 441   IN   EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *This,
 442   IN  CHAR16                            *WString
 443   );
 444
 445 /**
 446   Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.TestString().
 447   If one of the characters in the *Wstring is
 448   neither valid Unicode drawing characters,
 449   not ASCII code, then this function will return
 450   EFI_UNSUPPORTED.
 451
 452   @param  This              Indicates the calling context.
 453   @param  WString           The Null-terminated Unicode string to be tested.
 454
 455   @retval EFI_SUCCESS       The terminal is capable of rendering the output string.
 456   @retval EFI_UNSUPPORTED   Some of the characters in the Unicode string cannot be rendered.
 457
 458 **/
 459 EFI_STATUS
 460 EFIAPI
 461 TerminalConOutTestString (
 462   IN  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *This,
 463   IN  CHAR16                           *WString
 464   );
 465
 466 /**
 467   Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.QueryMode().
 468   It returns information for an available text mode
 469   that the terminal supports.
 470   In this driver, we support text mode 80x25 (mode 0),
 471   80x50 (mode 1), 100x31 (mode 2).
 472
 473   @param This        Indicates the calling context.
 474   @param ModeNumber  The mode number to return information on.
 475   @param Columns     The returned columns of the requested mode.
 476   @param Rows        The returned rows of the requested mode.
 477
 478   @retval EFI_SUCCESS       The requested mode information is returned.
 479   @retval EFI_UNSUPPORTED   The mode number is not valid.
 480   @retval EFI_DEVICE_ERROR
 481
 482 **/
 483 EFI_STATUS
 484 EFIAPI
 485 TerminalConOutQueryMode (
 486   IN  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *This,
 487   IN  UINTN                            ModeNumber,
 488   OUT UINTN                            *Columns,
 489   OUT UINTN                            *Rows
 490   );
 491
 492 /**
 493   Implements EFI_SIMPLE_TEXT_OUT.SetMode().
 494   Set the terminal to a specified display mode.
 495   In this driver, we only support mode 0.
 496
 497   @param This          Indicates the calling context.
 498   @param ModeNumber    The text mode to set.
 499
 500   @retval EFI_SUCCESS       The requested text mode is set.
 501   @retval EFI_DEVICE_ERROR  The requested text mode cannot be set
 502                             because of serial device error.
 503   @retval EFI_UNSUPPORTED   The text mode number is not valid.
 504
 505 **/
 506 EFI_STATUS
 507 EFIAPI
 508 TerminalConOutSetMode (
 509   IN  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *This,
 510   IN  UINTN                            ModeNumber
 511   );
 512
 513 /**
 514   Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.SetAttribute().
 515
 516   @param This        Indicates the calling context.
 517   @param Attribute   The attribute to set. Only bit0..6 are valid, all other bits
 518                      are undefined and must be zero.
 519
 520   @retval EFI_SUCCESS        The requested attribute is set.
 521   @retval EFI_DEVICE_ERROR   The requested attribute cannot be set due to serial port error.
 522   @retval EFI_UNSUPPORTED    The attribute requested is not defined by EFI spec.
 523
 524 **/
 525 EFI_STATUS
 526 EFIAPI
 527 TerminalConOutSetAttribute (
 528   IN  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *This,
 529   IN  UINTN                            Attribute
 530   );
 531
 532 /**
 533   Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.ClearScreen().
 534   It clears the ANSI terminal's display to the
 535   currently selected background color.
 536
 537   @param This     Indicates the calling context.
 538
 539   @retval EFI_SUCCESS       The operation completed successfully.
 540   @retval EFI_DEVICE_ERROR  The terminal screen cannot be cleared due to serial port error.
 541   @retval EFI_UNSUPPORTED   The terminal is not in a valid display mode.
 542
 543 **/
 544 EFI_STATUS
 545 EFIAPI
 546 TerminalConOutClearScreen (
 547   IN  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *This
 548   );
 549
 550 /**
 551   Implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.SetCursorPosition().
 552
 553   @param This      Indicates the calling context.
 554   @param Column    The row to set cursor to.
 555   @param Row       The column to set cursor to.
 556
 557   @retval EFI_SUCCESS       The operation completed successfully.
 558   @retval EFI_DEVICE_ERROR  The request fails due to serial port error.
 559   @retval EFI_UNSUPPORTED   The terminal is not in a valid text mode, or the cursor position
 560                             is invalid for current mode.
 561
 562 **/
 563 EFI_STATUS
 564 EFIAPI
 565 TerminalConOutSetCursorPosition (
 566   IN  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *This,
 567   IN  UINTN                            Column,
 568   IN  UINTN                            Row
 569   );
 570
 571 /**
 572   Implements SIMPLE_TEXT_OUTPUT.EnableCursor().
 573   In this driver, the cursor cannot be hidden.
 574
 575   @param This      Indicates the calling context.
 576   @param Visible   If TRUE, the cursor is set to be visible,
 577                    If FALSE, the cursor is set to be invisible.
 578
 579   @retval EFI_SUCCESS      The request is valid.
 580   @retval EFI_UNSUPPORTED  The terminal does not support cursor hidden.
 581
 582 **/
 583 EFI_STATUS
 584 EFIAPI
 585 TerminalConOutEnableCursor (
 586   IN  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL  *This,
 587   IN  BOOLEAN                          Visible
 588   );
 589
 590 /**
 591   Test to see if this driver supports Controller.
 592
 593   @param  This                Protocol instance pointer.
 594   @param  ControllerHandle    Handle of device to test
 595   @param  RemainingDevicePath Optional parameter use to pick a specific child
 596                               device to start.
 597
 598   @retval EFI_SUCCESS         This driver supports this device.
 599   @retval EFI_ALREADY_STARTED This driver is already running on this device.
 600   @retval other               This driver does not support this device.
 601
 602 **/
 603 EFI_STATUS
 604 EFIAPI
 605 TerminalDriverBindingSupported (
 606   IN EFI_DRIVER_BINDING_PROTOCOL    *This,
 607   IN EFI_HANDLE                     ControllerHandle,
 608   IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
 609   );
 610
 611 /**
 612   Start this driver on Controller by opening a Serial IO protocol,
 613   reading Device Path, and creating a child handle with a Simple Text In,
 614   Simple Text In Ex and Simple Text Out protocol, and device path protocol.
 615   And store Console Device Environment Variables.
 616
 617   @param  This                 Protocol instance pointer.
 618   @param  Controller           Handle of device to bind driver to
 619   @param  RemainingDevicePath  Optional parameter use to pick a specific child
 620                                device to start.
 621
 622   @retval EFI_SUCCESS          This driver is added to Controller.
 623   @retval EFI_ALREADY_STARTED  This driver is already running on Controller.
 624   @retval other                This driver does not support this device.
 625
 626 **/
 627 EFI_STATUS
 628 EFIAPI
 629 TerminalDriverBindingStart (
 630   IN EFI_DRIVER_BINDING_PROTOCOL    *This,
 631   IN EFI_HANDLE                     Controller,
 632   IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
 633   );
 634
 635
 636 /**
 637   Stop this driver on Controller by closing Simple Text In, Simple Text
 638   In Ex, Simple Text Out protocol, and removing parent device path from
 639   Console Device Environment Variables.
 640
 641   @param  This              Protocol instance pointer.
 642   @param  Controller        Handle of device to stop driver on
 643   @param  NumberOfChildren  Number of Handles in ChildHandleBuffer. If number of
 644                             children is zero stop the entire bus driver.
 645   @param  ChildHandleBuffer List of Child Handles to Stop.
 646
 647   @retval EFI_SUCCESS       This driver is removed Controller.
 648   @retval other             This driver could not be removed from this device.
 649
 650 **/
 651 EFI_STATUS
 652 EFIAPI
 653 TerminalDriverBindingStop (
 654   IN  EFI_DRIVER_BINDING_PROTOCOL    *This,
 655   IN  EFI_HANDLE                     Controller,
 656   IN  UINTN                          NumberOfChildren,
 657   IN  EFI_HANDLE                     *ChildHandleBuffer
 658   );
 659
 660 /**
 661   Free notify functions list.
 662
 663   @param  ListHead               The list head
 664
 665   @retval EFI_SUCCESS            Free the notify list successfully.
 666   @retval EFI_INVALID_PARAMETER  ListHead is NULL.
 667
 668 **/
 669 EFI_STATUS
 670 TerminalFreeNotifyList (
 671   IN OUT LIST_ENTRY           *ListHead
 672   );
 673
 674 /**
 675   Retrieves a Unicode string that is the user readable name of the driver.
 676
 677   This function retrieves the user readable name of a driver in the form of a
 678   Unicode string. If the driver specified by This has a user readable name in
 679   the language specified by Language, then a pointer to the driver name is
 680   returned in DriverName, and EFI_SUCCESS is returned. If the driver specified
 681   by This does not support the language specified by Language,
 682   then EFI_UNSUPPORTED is returned.
 683
 684   @param  This[in]              A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
 685                                 EFI_COMPONENT_NAME_PROTOCOL instance.
 686
 687   @param  Language[in]          A pointer to a Null-terminated ASCII string
 688                                 array indicating the language. This is the
 689                                 language of the driver name that the caller is
 690                                 requesting, and it must match one of the
 691                                 languages specified in SupportedLanguages. The
 692                                 number of languages supported by a driver is up
 693                                 to the driver writer. Language is specified
 694                                 in RFC 4646 or ISO 639-2 language code format.
 695
 696   @param  DriverName[out]       A pointer to the Unicode string to return.
 697                                 This Unicode string is the name of the
 698                                 driver specified by This in the language
 699                                 specified by Language.
 700
 701   @retval EFI_SUCCESS           The Unicode string for the Driver specified by
 702                                 This and the language specified by Language was
 703                                 returned in DriverName.
 704
 705   @retval EFI_INVALID_PARAMETER Language is NULL.
 706
 707   @retval EFI_INVALID_PARAMETER DriverName is NULL.
 708
 709   @retval EFI_UNSUPPORTED       The driver specified by This does not support
 710                                 the language specified by Language.
 711
 712 **/
 713 EFI_STATUS
 714 EFIAPI
 715 TerminalComponentNameGetDriverName (
 716   IN  EFI_COMPONENT_NAME_PROTOCOL  *This,
 717   IN  CHAR8                        *Language,
 718   OUT CHAR16                       **DriverName
 719   );
 720
 721
 722 /**
 723   Retrieves a Unicode string that is the user readable name of the controller
 724   that is being managed by a driver.
 725
 726   This function retrieves the user readable name of the controller specified by
 727   ControllerHandle and ChildHandle in the form of a Unicode string. If the
 728   driver specified by This has a user readable name in the language specified by
 729   Language, then a pointer to the controller name is returned in ControllerName,
 730   and EFI_SUCCESS is returned.  If the driver specified by This is not currently
 731   managing the controller specified by ControllerHandle and ChildHandle,
 732   then EFI_UNSUPPORTED is returned.  If the driver specified by This does not
 733   support the language specified by Language, then EFI_UNSUPPORTED is returned.
 734
 735   @param  This[in]              A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
 736                                 EFI_COMPONENT_NAME_PROTOCOL instance.
 737
 738   @param  ControllerHandle[in]  The handle of a controller that the driver
 739                                 specified by This is managing.  This handle
 740                                 specifies the controller whose name is to be
 741                                 returned.
 742
 743   @param  ChildHandle[in]       The handle of the child controller to retrieve
 744                                 the name of.  This is an optional parameter that
 745                                 may be NULL.  It will be NULL for device
 746                                 drivers.  It will also be NULL for a bus drivers
 747                                 that wish to retrieve the name of the bus
 748                                 controller.  It will not be NULL for a bus
 749                                 driver that wishes to retrieve the name of a
 750                                 child controller.
 751
 752   @param  Language[in]          A pointer to a Null-terminated ASCII string
 753                                 array indicating the language.  This is the
 754                                 language of the driver name that the caller is
 755                                 requesting, and it must match one of the
 756                                 languages specified in SupportedLanguages. The
 757                                 number of languages supported by a driver is up
 758                                 to the driver writer. Language is specified in
 759                                 RFC 4646 or ISO 639-2 language code format.
 760
 761   @param  ControllerName[out]   A pointer to the Unicode string to return.
 762                                 This Unicode string is the name of the
 763                                 controller specified by ControllerHandle and
 764                                 ChildHandle in the language specified by
 765                                 Language from the point of view of the driver
 766                                 specified by This.
 767
 768   @retval EFI_SUCCESS           The Unicode string for the user readable name in
 769                                 the language specified by Language for the
 770                                 driver specified by This was returned in
 771                                 DriverName.
 772
 773   @retval EFI_INVALID_PARAMETER ControllerHandle is NULL.
 774
 775   @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid
 776                                 EFI_HANDLE.
 777
 778   @retval EFI_INVALID_PARAMETER Language is NULL.
 779
 780   @retval EFI_INVALID_PARAMETER ControllerName is NULL.
 781
 782   @retval EFI_UNSUPPORTED       The driver specified by This is not currently
 783                                 managing the controller specified by
 784                                 ControllerHandle and ChildHandle.
 785
 786   @retval EFI_UNSUPPORTED       The driver specified by This does not support
 787                                 the language specified by Language.
 788
 789 **/
 790 EFI_STATUS
 791 EFIAPI
 792 TerminalComponentNameGetControllerName (
 793   IN  EFI_COMPONENT_NAME_PROTOCOL                     *This,
 794   IN  EFI_HANDLE                                      ControllerHandle,
 795   IN  EFI_HANDLE                                      ChildHandle        OPTIONAL,
 796   IN  CHAR8                                           *Language,
 797   OUT CHAR16                                          **ControllerName
 798   );
 799
 800
 801 //
 802 // internal functions
 803 //
 804
 805 /**
 806   Check for a pending key in the Efi Key FIFO or Serial device buffer.
 807
 808   @param  This                     Indicates the calling context.
 809
 810   @retval EFI_SUCCESS              There is key pending.
 811   @retval EFI_NOT_READY            There is no key pending.
 812   @retval EFI_DEVICE_ERROR         If Serial IO is not attached to serial device.
 813
 814 **/
 815 EFI_STATUS
 816 TerminalConInCheckForKey (
 817   IN  EFI_SIMPLE_TEXT_INPUT_PROTOCOL  *This
 818   );
 819
 820 /**
 821   Update terminal device path in Console Device Environment Variables.
 822
 823   @param  VariableName           The Console Device Environment Variable.
 824   @param  ParentDevicePath       The terminal device path to be updated.
 825
 826   @return None.
 827
 828 **/
 829 VOID
 830 TerminalUpdateConsoleDevVariable (
 831   IN CHAR16                    *VariableName,
 832   IN EFI_DEVICE_PATH_PROTOCOL  *ParentDevicePath
 833   );
 834
 835 /**
 836   Remove console device variable.
 837
 838   @param  VariableName           A pointer to the variable name.
 839   @param  ParentDevicePath       A pointer to the parent device path.
 840
 841 **/
 842 VOID
 843 TerminalRemoveConsoleDevVariable (
 844   IN CHAR16                    *VariableName,
 845   IN EFI_DEVICE_PATH_PROTOCOL  *ParentDevicePath
 846   );
 847
 848 /**
 849   Build termial device path according to terminal type.
 850
 851   @param  TerminalType           The terminal type is PC ANSI, VT100, VT100+ or VT-UTF8.
 852   @param  ParentDevicePath       Parent device path.
 853   @param  TerminalDevicePath     Returned terminal device path, if building successfully.
 854
 855   @retval EFI_UNSUPPORTED        Terminal does not belong to the supported type.
 856   @retval EFI_OUT_OF_RESOURCES   Generate terminal device path failed.
 857   @retval EFI_SUCCESS            Build terminal device path successfully.
 858
 859 **/
 860 EFI_STATUS
 861 SetTerminalDevicePath (
 862   IN  UINT8                       TerminalType,
 863   IN  EFI_DEVICE_PATH_PROTOCOL    *ParentDevicePath,
 864   OUT EFI_DEVICE_PATH_PROTOCOL    **TerminalDevicePath
 865   );
 866
 867 /**
 868   Get one key out of serial buffer.
 869
 870   @param  SerialIo           Serial I/O protocl attached to the serial device.
 871   @param  Input              The fetched key.
 872
 873   @retval EFI_NOT_READY      If serial buffer is empty.
 874   @retval EFI_DEVICE_ERROR   If reading serial buffer encounter error.
 875   @retval EFI_SUCCESS        If reading serial buffer successfully, put
 876                              the fetched key to the parameter output.
 877
 878 **/
 879 EFI_STATUS
 880 GetOneKeyFromSerial (
 881   EFI_SERIAL_IO_PROTOCOL  *SerialIo,
 882   UINT8                   *Input
 883   );
 884
 885 /**
 886   Insert one byte raw data into the Raw Data FIFO.
 887
 888   @param  TerminalDevice       Terminal driver private structure.
 889   @param  Input                The key will be input.
 890
 891   @retval TRUE                 If insert successfully.
 892   @retval FLASE                If Raw Data buffer is full before key insertion,
 893                                and the key is lost.
 894
 895 **/
 896 BOOLEAN
 897 RawFiFoInsertOneKey (
 898   TERMINAL_DEV  *TerminalDevice,
 899   UINT8         Input
 900   );
 901
 902 /**
 903   Remove one pre-fetched key out of the Raw Data FIFO.
 904
 905   @param  TerminalDevice       Terminal driver private structure.
 906   @param  Output               The key will be removed.
 907
 908   @retval TRUE                 If insert successfully.
 909   @retval FLASE                If Raw Data FIFO buffer is empty before remove operation.
 910
 911 **/
 912 BOOLEAN
 913 RawFiFoRemoveOneKey (
 914   TERMINAL_DEV  *TerminalDevice,
 915   UINT8         *Output
 916   );
 917
 918 /**
 919   Clarify whether Raw Data FIFO buffer is empty.
 920
 921   @param  TerminalDevice       Terminal driver private structure
 922
 923   @retval TRUE                 If Raw Data FIFO buffer is empty.
 924   @retval FLASE                If Raw Data FIFO buffer is not empty.
 925
 926 **/
 927 BOOLEAN
 928 IsRawFiFoEmpty (
 929   TERMINAL_DEV  *TerminalDevice
 930   );
 931
 932 /**
 933   Clarify whether Raw Data FIFO buffer is full.
 934
 935   @param  TerminalDevice       Terminal driver private structure
 936
 937   @retval TRUE                 If Raw Data FIFO buffer is full.
 938   @retval FLASE                If Raw Data FIFO buffer is not full.
 939
 940 **/
 941 BOOLEAN
 942 IsRawFiFoFull (
 943   TERMINAL_DEV  *TerminalDevice
 944   );
 945
 946 /**
 947   Insert one pre-fetched key into the FIFO buffer.
 948
 949   @param  TerminalDevice       Terminal driver private structure.
 950   @param  Key                  The key will be input.
 951
 952   @retval TRUE                 If insert successfully.
 953   @retval FLASE                If FIFO buffer is full before key insertion,
 954                                and the key is lost.
 955
 956 **/
 957 BOOLEAN
 958 EfiKeyFiFoInsertOneKey (
 959   TERMINAL_DEV      *TerminalDevice,
 960   EFI_INPUT_KEY     *Key
 961   );
 962
 963 /**
 964   Remove one pre-fetched key out of the FIFO buffer.
 965
 966   @param  TerminalDevice       Terminal driver private structure.
 967   @param  Output               The key will be removed.
 968
 969   @retval TRUE                 If insert successfully.
 970   @retval FLASE                If FIFO buffer is empty before remove operation.
 971
 972 **/
 973 BOOLEAN
 974 EfiKeyFiFoRemoveOneKey (
 975   TERMINAL_DEV  *TerminalDevice,
 976   EFI_INPUT_KEY *Output
 977   );
 978
 979 /**
 980   Clarify whether FIFO buffer is empty.
 981
 982   @param  TerminalDevice       Terminal driver private structure
 983
 984   @retval TRUE                 If FIFO buffer is empty.
 985   @retval FLASE                If FIFO buffer is not empty.
 986
 987 **/
 988 BOOLEAN
 989 IsEfiKeyFiFoEmpty (
 990   TERMINAL_DEV  *TerminalDevice
 991   );
 992
 993 /**
 994   Clarify whether FIFO buffer is full.
 995
 996   @param  TerminalDevice       Terminal driver private structure
 997
 998   @retval TRUE                 If FIFO buffer is full.
 999   @retval FLASE                If FIFO buffer is not full.
1000
1001 **/
1002 BOOLEAN
1003 IsEfiKeyFiFoFull (
1004   TERMINAL_DEV  *TerminalDevice
1005   );
1006
1007 /**
1008   Insert one pre-fetched key into the Unicode FIFO buffer.
1009
1010   @param  TerminalDevice       Terminal driver private structure.
1011   @param  Input                The key will be input.
1012
1013   @retval TRUE                 If insert successfully.
1014   @retval FLASE                If Unicode FIFO buffer is full before key insertion,
1015                                and the key is lost.
1016
1017 **/
1018 BOOLEAN
1019 UnicodeFiFoInsertOneKey (
1020   TERMINAL_DEV      *TerminalDevice,
1021   UINT16            Input
1022   );
1023
1024 /**
1025   Remove one pre-fetched key out of the Unicode FIFO buffer.
1026
1027   @param  TerminalDevice       Terminal driver private structure.
1028   @param  Output               The key will be removed.
1029
1030   @retval TRUE                 If insert successfully.
1031   @retval FLASE                If Unicode FIFO buffer is empty before remove operation.
1032
1033 **/
1034 BOOLEAN
1035 UnicodeFiFoRemoveOneKey (
1036   TERMINAL_DEV  *TerminalDevice,
1037   UINT16        *Output
1038   );
1039
1040 /**
1041   Clarify whether Unicode FIFO buffer is empty.
1042
1043   @param  TerminalDevice       Terminal driver private structure
1044
1045   @retval TRUE                 If Unicode FIFO buffer is empty.
1046   @retval FLASE                If Unicode FIFO buffer is not empty.
1047
1048 **/
1049 BOOLEAN
1050 IsUnicodeFiFoEmpty (
1051   TERMINAL_DEV  *TerminalDevice
1052   );
1053
1054 /**
1055   Clarify whether Unicode FIFO buffer is full.
1056
1057   @param  TerminalDevice       Terminal driver private structure
1058
1059   @retval TRUE                 If Unicode FIFO buffer is full.
1060   @retval FLASE                If Unicode FIFO buffer is not full.
1061
1062 **/
1063 BOOLEAN
1064 IsUnicodeFiFoFull (
1065   TERMINAL_DEV  *TerminalDevice
1066   );
1067
1068 /**
1069   Count Unicode FIFO buffer.
1070
1071   @param  TerminalDevice       Terminal driver private structure
1072
1073   @return The count in bytes of Unicode FIFO.
1074
1075 **/
1076 UINT8
1077 UnicodeFiFoGetKeyCount (
1078   TERMINAL_DEV    *TerminalDevice
1079   );
1080
1081 /**
1082   Translate raw data into Unicode (according to different encode), and
1083   translate Unicode into key information. (according to different standard).
1084
1085   @param  TerminalDevice       Terminal driver private structure.
1086
1087 **/
1088 VOID
1089 TranslateRawDataToEfiKey (
1090   IN  TERMINAL_DEV      *TerminalDevice
1091   );
1092
1093 //
1094 // internal functions for PC ANSI
1095 //
1096
1097 /**
1098   Translate all raw data in the Raw FIFI into unicode, and insert
1099   them into Unicode FIFO.
1100
1101   @param TerminalDevice          The terminal device.
1102
1103 **/
1104 VOID
1105 AnsiRawDataToUnicode (
1106   IN  TERMINAL_DEV    *TerminalDevice
1107   );
1108
1109 /**
1110   Converts a stream of Unicode characters from a terminal input device into EFI Keys that
1111   can be read through the Simple Input Protocol.
1112
1113   The table below shows the keyboard input mappings that this function supports.
1114   If the ESC sequence listed in one of the columns is presented, then it is translated
1115   into the coorespoding EFI Scan Code.  If a matching sequence is not found, then the raw
1116   key strokes are converted into EFI Keys.
1117
1118   2 seconds are allowed for an ESC sequence to be completed.  If the ESC sequence is not
1119   completed in 2 seconds, then the raw key strokes of the partial ESC sequence are
1120   converted into EFI Keys.
1121   There is one special input sequence that will force the system to reset.
1122   This is ESC R ESC r ESC R.
1123
1124   Symbols used in table below
1125   ===========================
1126     ESC = 0x1B
1127     CSI = 0x9B
1128     DEL = 0x7f
1129     ^   = CTRL
1130   +=========+======+===========+==========+==========+
1131   |         | EFI  | UEFI 2.0  |          |          |
1132   |         | Scan |           |  VT100+  |          |
1133   |   KEY   | Code |  PC ANSI  |  VTUTF8  |   VT100  |
1134   +=========+======+===========+==========+==========+
1135   | NULL    | 0x00 |           |          |          |
1136   | UP      | 0x01 | ESC [ A   | ESC [ A  | ESC [ A  |
1137   | DOWN    | 0x02 | ESC [ B   | ESC [ B  | ESC [ B  |
1138   | RIGHT   | 0x03 | ESC [ C   | ESC [ C  | ESC [ C  |
1139   | LEFT    | 0x04 | ESC [ D   | ESC [ D  | ESC [ D  |
1140   | HOME    | 0x05 | ESC [ H   | ESC h    | ESC [ H  |
1141   | END     | 0x06 | ESC [ F   | ESC k    | ESC [ K  |
1142   | INSERT  | 0x07 | ESC [ @   | ESC +    | ESC [ @  |
1143   |         |      | ESC [ L   |          | ESC [ L  |
1144   | DELETE  | 0x08 | ESC [ X   | ESC -    | ESC [ P  |
1145   | PG UP   | 0x09 | ESC [ I   | ESC ?    | ESC [ V  |
1146   |         |      |           |          | ESC [ ?  |
1147   | PG DOWN | 0x0A | ESC [ G   | ESC /    | ESC [ U  |
1148   |         |      |           |          | ESC [ /  |
1149   | F1      | 0x0B | ESC [ M   | ESC 1    | ESC O P  |
1150   | F2      | 0x0C | ESC [ N   | ESC 2    | ESC O Q  |
1151   | F3      | 0x0D | ESC [ O   | ESC 3    | ESC O w  |
1152   | F4      | 0x0E | ESC [ P   | ESC 4    | ESC O x  |
1153   | F5      | 0x0F | ESC [ Q   | ESC 5    | ESC O t  |
1154   | F6      | 0x10 | ESC [ R   | ESC 6    | ESC O u  |
1155   | F7      | 0x11 | ESC [ S   | ESC 7    | ESC O q  |
1156   | F8      | 0x12 | ESC [ T   | ESC 8    | ESC O r  |
1157   | F9      | 0x13 | ESC [ U   | ESC 9    | ESC O p  |
1158   | F10     | 0x14 | ESC [ V   | ESC 0    | ESC O M  |
1159   | Escape  | 0x17 | ESC       | ESC      | ESC      |
1160   | F11     | 0x15 |           | ESC !    |          |
1161   | F12     | 0x16 |           | ESC @    |          |
1162   +=========+======+===========+==========+==========+
1163
1164   Special Mappings
1165   ================
1166   ESC R ESC r ESC R = Reset System
1167
1168
1169   @param TerminalDevice   The terminal device to use to translate raw input into EFI Keys
1170
1171 **/
1172 VOID
1173 UnicodeToEfiKey (
1174   IN  TERMINAL_DEV    *TerminalDevice
1175   );
1176
1177 /**
1178   Check if input string is valid Ascii string, valid EFI control characters
1179   or valid text graphics.
1180
1181   @param  TerminalDevice          The terminal device.
1182   @param  WString                 The input string.
1183
1184   @retval EFI_UNSUPPORTED         If not all input characters are valid.
1185   @retval EFI_SUCCESS             If all input characters are valid.
1186
1187 **/
1188 EFI_STATUS
1189 AnsiTestString (
1190   IN  TERMINAL_DEV    *TerminalDevice,
1191   IN  CHAR16          *WString
1192   );
1193
1194 //
1195 // internal functions for VTUTF8
1196 //
1197
1198 /**
1199   Translate all VT-UTF8 characters in the Raw FIFI into unicode characters,
1200   and insert them into Unicode FIFO.
1201
1202   @param VtUtf8Device          The terminal device.
1203
1204 **/
1205 VOID
1206 VTUTF8RawDataToUnicode (
1207   IN  TERMINAL_DEV    *VtUtf8Device
1208   );
1209
1210 /**
1211   Check if input string is valid VT-UTF8 string.
1212
1213   @param  TerminalDevice          The terminal device.
1214   @param  WString                 The input string.
1215
1216   @retval EFI_SUCCESS             If all input characters are valid.
1217
1218 **/
1219 EFI_STATUS
1220 VTUTF8TestString (
1221   IN  TERMINAL_DEV    *TerminalDevice,
1222   IN  CHAR16          *WString
1223   );
1224
1225 /**
1226   Translate one Unicode character into VT-UTF8 characters.
1227
1228   UTF8 Encoding Table
1229   Bits per Character | Unicode Character Range | Unicode Binary  Encoding |     UTF8 Binary Encoding
1230         0-7              |     0x0000 - 0x007F      |     00000000 0xxxxxxx        |   0xxxxxxx
1231         8-11           |     0x0080 - 0x07FF        |     00000xxx xxxxxxxx       |   110xxxxx 10xxxxxx
1232        12-16            |     0x0800 - 0xFFFF       |     xxxxxxxx xxxxxxxx        |   1110xxxx 10xxxxxx 10xxxxxx
1233
1234
1235   @param  Unicode          Unicode character need translating.
1236   @param  Utf8Char         Return VT-UTF8 character set.
1237   @param  ValidBytes       The count of valid VT-UTF8 characters. If
1238                            ValidBytes is zero, no valid VT-UTF8 returned.
1239
1240 **/
1241 VOID
1242 UnicodeToUtf8 (
1243   IN  CHAR16      Unicode,
1244   OUT UTF8_CHAR   *Utf8Char,
1245   OUT UINT8       *ValidBytes
1246   );
1247
1248 /**
1249   Get one valid VT-UTF8 characters set from Raw Data FIFO.
1250
1251   @param  Utf8Device          The terminal device.
1252   @param  Utf8Char            Returned valid VT-UTF8 characters set.
1253   @param  ValidBytes          The count of returned VT-VTF8 characters.
1254                               If ValidBytes is zero, no valid VT-UTF8 returned.
1255
1256 **/
1257 VOID
1258 GetOneValidUtf8Char (
1259   IN  TERMINAL_DEV      *Utf8Device,
1260   OUT UTF8_CHAR         *Utf8Char,
1261   OUT UINT8             *ValidBytes
1262   );
1263
1264 /**
1265   Translate VT-UTF8 characters into one Unicode character.
1266
1267   UTF8 Encoding Table
1268   Bits per Character | Unicode Character Range | Unicode Binary  Encoding |     UTF8 Binary Encoding
1269         0-7              |     0x0000 - 0x007F      |     00000000 0xxxxxxx        |   0xxxxxxx
1270         8-11           |     0x0080 - 0x07FF        |     00000xxx xxxxxxxx       |   110xxxxx 10xxxxxx
1271        12-16            |     0x0800 - 0xFFFF       |     xxxxxxxx xxxxxxxx        |   1110xxxx 10xxxxxx 10xxxxxx
1272
1273
1274   @param  Utf8Char         VT-UTF8 character set needs translating.
1275   @param  ValidBytes       The count of valid VT-UTF8 characters.
1276   @param  UnicodeChar      Returned unicode character.
1277
1278 **/
1279 VOID
1280 Utf8ToUnicode (
1281   IN  UTF8_CHAR       Utf8Char,
1282   IN  UINT8           ValidBytes,
1283   OUT CHAR16          *UnicodeChar
1284   );
1285
1286 //
1287 // functions for boxdraw unicode
1288 //
1289
1290 /**
1291   Detects if a Unicode char is for Box Drawing text graphics.
1292
1293   @param  Graphic      Unicode char to test.
1294   @param  PcAnsi       Optional pointer to return PCANSI equivalent of
1295                        Graphic.
1296   @param  Ascii        Optional pointer to return ASCII equivalent of
1297                        Graphic.
1298
1299   @retval TRUE         If Graphic is a supported Unicode Box Drawing character.
1300
1301 **/
1302 BOOLEAN
1303 TerminalIsValidTextGraphics (
1304   IN  CHAR16  Graphic,
1305   OUT CHAR8   *PcAnsi, OPTIONAL
1306   OUT CHAR8   *Ascii OPTIONAL
1307   );
1308
1309 /**
1310   Detects if a valid ASCII char.
1311
1312   @param  Ascii        An ASCII character.
1313
1314   @retval TRUE         If it is a valid ASCII character.
1315   @retval FALSE        If it is not a valid ASCII character.
1316
1317 **/
1318 BOOLEAN
1319 TerminalIsValidAscii (
1320   IN  CHAR16  Ascii
1321   );
1322
1323 /**
1324   Detects if a valid EFI control character.
1325
1326   @param  CharC        An input EFI Control character.
1327
1328   @retval TRUE         If it is a valid EFI control character.
1329   @retval FALSE        If it is not a valid EFI control character.
1330
1331 **/
1332 BOOLEAN
1333 TerminalIsValidEfiCntlChar (
1334   IN  CHAR16  CharC
1335   );
1336
1337 /**
1338   Check if the device supports hot-plug through its device path.
1339
1340   This function could be updated to check more types of Hot Plug devices.
1341   Currently, it checks USB and PCCard device.
1342
1343   @param  DevicePath            Pointer to device's device path.
1344
1345   @retval TRUE                  The devcie is a hot-plug device
1346   @retval FALSE                 The devcie is not a hot-plug device.
1347
1348 **/
1349 BOOLEAN
1350 IsHotPlugDevice (
1351   IN  EFI_DEVICE_PATH_PROTOCOL    *DevicePath
1352   );
1353
1354 /**
1355   Timer handler to poll the key from serial.
1356
1357   @param  Event                    Indicates the event that invoke this function.
1358   @param  Context                  Indicates the calling context.
1359 **/
1360 VOID
1361 EFIAPI
1362 TerminalConInTimerHandler (
1363   IN EFI_EVENT            Event,
1364   IN VOID                 *Context
1365   );
1366 #endif