IntelFrameworkModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2Keyboard.c

   1 /** @file
   2
   3   PS/2 Keyboard driver. Routines that interacts with callers,
   4   conforming to EFI driver model
   5
   6 Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
   7 This program and the accompanying materials
   8 are licensed and made available under the terms and conditions of the BSD License
   9 which accompanies this distribution.  The full text of the license may be found at
  10 http://opensource.org/licenses/bsd-license.php
  11
  12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  14
  15 **/
  16
  17 #include "Ps2Keyboard.h"
  18
  19 //
  20 // Function prototypes
  21 //
  22 /**
  23   Test controller is a keyboard Controller.
  24
  25   @param This                 Pointer of EFI_DRIVER_BINDING_PROTOCOL
  26   @param Controller           driver's controller
  27   @param RemainingDevicePath  children device path
  28
  29   @retval EFI_UNSUPPORTED controller is not floppy disk
  30   @retval EFI_SUCCESS     controller is floppy disk
  31 **/
  32 EFI_STATUS
  33 EFIAPI
  34 KbdControllerDriverSupported (
  35   IN EFI_DRIVER_BINDING_PROTOCOL    *This,
  36   IN EFI_HANDLE                     Controller,
  37   IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
  38   );
  39
  40 /**
  41   Create KEYBOARD_CONSOLE_IN_DEV instance on controller.
  42
  43   @param This         Pointer of EFI_DRIVER_BINDING_PROTOCOL
  44   @param Controller   driver controller handle
  45   @param RemainingDevicePath Children's device path
  46
  47   @retval whether success to create floppy control instance.
  48 **/
  49 EFI_STATUS
  50 EFIAPI
  51 KbdControllerDriverStart (
  52   IN EFI_DRIVER_BINDING_PROTOCOL    *This,
  53   IN EFI_HANDLE                     Controller,
  54   IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
  55   );
  56
  57 /**
  58   Stop this driver on ControllerHandle. Support stoping any child handles
  59   created by this driver.
  60
  61   @param  This              Protocol instance pointer.
  62   @param  ControllerHandle  Handle of device to stop driver on
  63   @param  NumberOfChildren  Number of Handles in ChildHandleBuffer. If number of
  64                             children is zero stop the entire bus driver.
  65   @param  ChildHandleBuffer List of Child Handles to Stop.
  66
  67   @retval EFI_SUCCESS       This driver is removed ControllerHandle
  68   @retval other             This driver was not removed from this device
  69
  70 **/
  71 EFI_STATUS
  72 EFIAPI
  73 KbdControllerDriverStop (
  74   IN  EFI_DRIVER_BINDING_PROTOCOL    *This,
  75   IN  EFI_HANDLE                     Controller,
  76   IN  UINTN                          NumberOfChildren,
  77   IN  EFI_HANDLE                     *ChildHandleBuffer
  78   );
  79
  80 /**
  81   Free the waiting key notify list.
  82
  83   @param ListHead  Pointer to list head
  84
  85   @retval EFI_INVALID_PARAMETER  ListHead is NULL
  86   @retval EFI_SUCCESS            Sucess to free NotifyList
  87 **/
  88 EFI_STATUS
  89 KbdFreeNotifyList (
  90   IN OUT LIST_ENTRY           *ListHead
  91   );
  92
  93 //
  94 // DriverBinding Protocol Instance
  95 //
  96 EFI_DRIVER_BINDING_PROTOCOL gKeyboardControllerDriver = {
  97   KbdControllerDriverSupported,
  98   KbdControllerDriverStart,
  99   KbdControllerDriverStop,
 100   0xa,
 101   NULL,
 102   NULL
 103 };
 104
 105 /**
 106   Test controller is a keyboard Controller.
 107
 108   @param This                 Pointer of EFI_DRIVER_BINDING_PROTOCOL
 109   @param Controller           driver's controller
 110   @param RemainingDevicePath  children device path
 111
 112   @retval EFI_UNSUPPORTED controller is not floppy disk
 113   @retval EFI_SUCCESS     controller is floppy disk
 114 **/
 115 EFI_STATUS
 116 EFIAPI
 117 KbdControllerDriverSupported (
 118   IN EFI_DRIVER_BINDING_PROTOCOL    *This,
 119   IN EFI_HANDLE                     Controller,
 120   IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
 121   )
 122 {
 123   EFI_STATUS                          Status;
 124   EFI_ISA_IO_PROTOCOL                 *IsaIo;
 125
 126   //
 127   // Open the IO Abstraction(s) needed to perform the supported test
 128   //
 129   Status = gBS->OpenProtocol (
 130                   Controller,
 131                   &gEfiIsaIoProtocolGuid,
 132                   (VOID **) &IsaIo,
 133                   This->DriverBindingHandle,
 134                   Controller,
 135                   EFI_OPEN_PROTOCOL_BY_DRIVER
 136                   );
 137   if (EFI_ERROR (Status)) {
 138     return Status;
 139   }
 140   //
 141   // Use the ISA I/O Protocol to see if Controller is the Keyboard controller
 142   //
 143   if (IsaIo->ResourceList->Device.HID != EISA_PNP_ID (0x303) || IsaIo->ResourceList->Device.UID != 0) {
 144     Status = EFI_UNSUPPORTED;
 145   }
 146   //
 147   // Close the I/O Abstraction(s) used to perform the supported test
 148   //
 149   gBS->CloseProtocol (
 150          Controller,
 151          &gEfiIsaIoProtocolGuid,
 152          This->DriverBindingHandle,
 153          Controller
 154          );
 155
 156   return Status;
 157 }
 158
 159 /**
 160   Create KEYBOARD_CONSOLE_IN_DEV instance on controller.
 161
 162   @param This         Pointer of EFI_DRIVER_BINDING_PROTOCOL
 163   @param Controller   driver controller handle
 164   @param RemainingDevicePath Children's device path
 165
 166   @retval whether success to create floppy control instance.
 167 **/
 168 EFI_STATUS
 169 EFIAPI
 170 KbdControllerDriverStart (
 171   IN EFI_DRIVER_BINDING_PROTOCOL    *This,
 172   IN EFI_HANDLE                     Controller,
 173   IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
 174   )
 175 {
 176   EFI_STATUS                                Status;
 177   EFI_STATUS                                Status1;
 178   EFI_ISA_IO_PROTOCOL                       *IsaIo;
 179   KEYBOARD_CONSOLE_IN_DEV                   *ConsoleIn;
 180   UINT8                                     Data;
 181   EFI_STATUS_CODE_VALUE                     StatusCode;
 182   EFI_DEVICE_PATH_PROTOCOL                  *ParentDevicePath;
 183
 184   StatusCode = 0;
 185
 186   Status = gBS->OpenProtocol (
 187                   Controller,
 188                   &gEfiDevicePathProtocolGuid,
 189                   (VOID **) &ParentDevicePath,
 190                   This->DriverBindingHandle,
 191                   Controller,
 192                   EFI_OPEN_PROTOCOL_BY_DRIVER
 193                   );
 194   if (EFI_ERROR (Status)) {
 195     return Status;
 196   }
 197   //
 198   // Report that the keyboard is being enabled
 199   //
 200   REPORT_STATUS_CODE_WITH_DEVICE_PATH (
 201     EFI_PROGRESS_CODE,
 202     EFI_PERIPHERAL_KEYBOARD | EFI_P_PC_ENABLE,
 203     ParentDevicePath
 204     );
 205
 206   //
 207   // Get the ISA I/O Protocol on Controller's handle
 208   //
 209   Status = gBS->OpenProtocol (
 210                   Controller,
 211                   &gEfiIsaIoProtocolGuid,
 212                   (VOID **) &IsaIo,
 213                   This->DriverBindingHandle,
 214                   Controller,
 215                   EFI_OPEN_PROTOCOL_BY_DRIVER
 216                   );
 217   if (EFI_ERROR (Status)) {
 218     gBS->CloseProtocol (
 219            Controller,
 220            &gEfiDevicePathProtocolGuid,
 221            This->DriverBindingHandle,
 222            Controller
 223            );
 224     return EFI_INVALID_PARAMETER;
 225   }
 226   //
 227   // Allocate private data
 228   //
 229   ConsoleIn = AllocateZeroPool (sizeof (KEYBOARD_CONSOLE_IN_DEV));
 230   if (ConsoleIn == NULL) {
 231     Status      = EFI_OUT_OF_RESOURCES;
 232     StatusCode  = EFI_PERIPHERAL_KEYBOARD | EFI_P_EC_CONTROLLER_ERROR;
 233     goto ErrorExit;
 234   }
 235   //
 236   // Setup the device instance
 237   //
 238   ConsoleIn->Signature              = KEYBOARD_CONSOLE_IN_DEV_SIGNATURE;
 239   ConsoleIn->Handle                 = Controller;
 240   (ConsoleIn->ConIn).Reset          = KeyboardEfiReset;
 241   (ConsoleIn->ConIn).ReadKeyStroke  = KeyboardReadKeyStroke;
 242   ConsoleIn->DataRegisterAddress    = KEYBOARD_8042_DATA_REGISTER;
 243   ConsoleIn->StatusRegisterAddress  = KEYBOARD_8042_STATUS_REGISTER;
 244   ConsoleIn->CommandRegisterAddress = KEYBOARD_8042_COMMAND_REGISTER;
 245   ConsoleIn->IsaIo                  = IsaIo;
 246   ConsoleIn->DevicePath             = ParentDevicePath;
 247
 248   ConsoleIn->ConInEx.Reset               = KeyboardEfiResetEx;
 249   ConsoleIn->ConInEx.ReadKeyStrokeEx     = KeyboardReadKeyStrokeEx;
 250   ConsoleIn->ConInEx.SetState            = KeyboardSetState;
 251   ConsoleIn->ConInEx.RegisterKeyNotify   = KeyboardRegisterKeyNotify;
 252   ConsoleIn->ConInEx.UnregisterKeyNotify = KeyboardUnregisterKeyNotify;
 253
 254   InitializeListHead (&ConsoleIn->NotifyList);
 255
 256   //
 257   // Fix for random hangs in System waiting for the Key if no KBC is present in BIOS.
 258   //
 259   KeyboardRead (ConsoleIn, &Data);
 260   if ((KeyReadStatusRegister (ConsoleIn) & (KBC_PARE | KBC_TIM)) == (KBC_PARE | KBC_TIM)) {
 261     //
 262     // If nobody decodes KBC I/O port, it will read back as 0xFF.
 263     // Check the Time-Out and Parity bit to see if it has an active KBC in system
 264     //
 265     Status      = EFI_DEVICE_ERROR;
 266     StatusCode  = EFI_PERIPHERAL_KEYBOARD | EFI_P_EC_NOT_DETECTED;
 267     goto ErrorExit;
 268   }
 269
 270   //
 271   // Setup the WaitForKey event
 272   //
 273   Status = gBS->CreateEvent (
 274                   EVT_NOTIFY_WAIT,
 275                   TPL_NOTIFY,
 276                   KeyboardWaitForKey,
 277                   ConsoleIn,
 278                   &((ConsoleIn->ConIn).WaitForKey)
 279                   );
 280   if (EFI_ERROR (Status)) {
 281     Status      = EFI_OUT_OF_RESOURCES;
 282     StatusCode  = EFI_PERIPHERAL_KEYBOARD | EFI_P_EC_CONTROLLER_ERROR;
 283     goto ErrorExit;
 284   }
 285   //
 286   // Setup the WaitForKeyEx event
 287   //
 288   Status = gBS->CreateEvent (
 289                   EVT_NOTIFY_WAIT,
 290                   TPL_NOTIFY,
 291                   KeyboardWaitForKeyEx,
 292                   ConsoleIn,
 293                   &(ConsoleIn->ConInEx.WaitForKeyEx)
 294                   );
 295   if (EFI_ERROR (Status)) {
 296     Status      = EFI_OUT_OF_RESOURCES;
 297     StatusCode  = EFI_PERIPHERAL_KEYBOARD | EFI_P_EC_CONTROLLER_ERROR;
 298     goto ErrorExit;
 299   }
 300   // Setup a periodic timer, used for reading keystrokes at a fixed interval
 301   //
 302   Status = gBS->CreateEvent (
 303                   EVT_TIMER | EVT_NOTIFY_SIGNAL,
 304                   TPL_NOTIFY,
 305                   KeyboardTimerHandler,
 306                   ConsoleIn,
 307                   &ConsoleIn->TimerEvent
 308                   );
 309   if (EFI_ERROR (Status)) {
 310     Status      = EFI_OUT_OF_RESOURCES;
 311     StatusCode  = EFI_PERIPHERAL_KEYBOARD | EFI_P_EC_CONTROLLER_ERROR;
 312     goto ErrorExit;
 313   }
 314
 315   Status = gBS->SetTimer (
 316                   ConsoleIn->TimerEvent,
 317                   TimerPeriodic,
 318                   KEYBOARD_TIMER_INTERVAL
 319                   );
 320   if (EFI_ERROR (Status)) {
 321     Status      = EFI_OUT_OF_RESOURCES;
 322     StatusCode  = EFI_PERIPHERAL_KEYBOARD | EFI_P_EC_CONTROLLER_ERROR;
 323     goto ErrorExit;
 324   }
 325
 326   REPORT_STATUS_CODE_WITH_DEVICE_PATH (
 327     EFI_PROGRESS_CODE,
 328     EFI_PERIPHERAL_KEYBOARD | EFI_P_PC_PRESENCE_DETECT,
 329     ParentDevicePath
 330     );
 331
 332   //
 333   // Reset the keyboard device
 334   //
 335   Status = ConsoleIn->ConInEx.Reset (&ConsoleIn->ConInEx, TRUE);
 336   if (EFI_ERROR (Status)) {
 337     Status      = EFI_DEVICE_ERROR;
 338     StatusCode  = EFI_PERIPHERAL_KEYBOARD | EFI_P_EC_NOT_DETECTED;
 339     goto ErrorExit;
 340   }
 341
 342   ConsoleIn->ControllerNameTable = NULL;
 343   AddUnicodeString2 (
 344     "eng",
 345     gPs2KeyboardComponentName.SupportedLanguages,
 346     &ConsoleIn->ControllerNameTable,
 347     L"PS/2 Keyboard Device",
 348     TRUE
 349     );
 350   AddUnicodeString2 (
 351     "en",
 352     gPs2KeyboardComponentName2.SupportedLanguages,
 353     &ConsoleIn->ControllerNameTable,
 354     L"PS/2 Keyboard Device",
 355     FALSE
 356     );
 357
 358
 359   //
 360   // Install protocol interfaces for the keyboard device.
 361   //
 362   Status = gBS->InstallMultipleProtocolInterfaces (
 363                   &Controller,
 364                   &gEfiSimpleTextInProtocolGuid,
 365                   &ConsoleIn->ConIn,
 366                   &gEfiSimpleTextInputExProtocolGuid,
 367                   &ConsoleIn->ConInEx,
 368                   NULL
 369                   );
 370   if (EFI_ERROR (Status)) {
 371     StatusCode = EFI_PERIPHERAL_KEYBOARD | EFI_P_EC_CONTROLLER_ERROR;
 372     goto ErrorExit;
 373   }
 374
 375   return Status;
 376
 377 ErrorExit:
 378   //
 379   // Report error code
 380   //
 381   if (StatusCode != 0) {
 382     REPORT_STATUS_CODE_WITH_DEVICE_PATH (
 383       EFI_ERROR_CODE | EFI_ERROR_MINOR,
 384       StatusCode,
 385       ParentDevicePath
 386       );
 387   }
 388
 389   if ((ConsoleIn != NULL) && (ConsoleIn->ConIn.WaitForKey != NULL)) {
 390     gBS->CloseEvent (ConsoleIn->ConIn.WaitForKey);
 391   }
 392
 393   if ((ConsoleIn != NULL) && (ConsoleIn->TimerEvent != NULL)) {
 394     gBS->CloseEvent (ConsoleIn->TimerEvent);
 395   }
 396   if ((ConsoleIn != NULL) && (ConsoleIn->ConInEx.WaitForKeyEx != NULL)) {
 397     gBS->CloseEvent (ConsoleIn->ConInEx.WaitForKeyEx);
 398   }
 399   KbdFreeNotifyList (&ConsoleIn->NotifyList);
 400   if ((ConsoleIn != NULL) && (ConsoleIn->ControllerNameTable != NULL)) {
 401     FreeUnicodeStringTable (ConsoleIn->ControllerNameTable);
 402   }
 403   //
 404   // Since there will be no timer handler for keyboard input any more,
 405   // exhaust input data just in case there is still keyboard data left
 406   //
 407   if (ConsoleIn != NULL) {
 408     Status1 = EFI_SUCCESS;
 409     while (!EFI_ERROR (Status1) && (Status != EFI_DEVICE_ERROR)) {
 410       Status1 = KeyboardRead (ConsoleIn, &Data);;
 411     }
 412   }
 413
 414   if (ConsoleIn != NULL) {
 415     gBS->FreePool (ConsoleIn);
 416   }
 417
 418   gBS->CloseProtocol (
 419          Controller,
 420          &gEfiDevicePathProtocolGuid,
 421          This->DriverBindingHandle,
 422          Controller
 423          );
 424
 425   gBS->CloseProtocol (
 426          Controller,
 427          &gEfiIsaIoProtocolGuid,
 428          This->DriverBindingHandle,
 429          Controller
 430          );
 431
 432   return Status;
 433 }
 434
 435 /**
 436   Stop this driver on ControllerHandle. Support stoping any child handles
 437   created by this driver.
 438
 439   @param  This              Protocol instance pointer.
 440   @param  ControllerHandle  Handle of device to stop driver on
 441   @param  NumberOfChildren  Number of Handles in ChildHandleBuffer. If number of
 442                             children is zero stop the entire bus driver.
 443   @param  ChildHandleBuffer List of Child Handles to Stop.
 444
 445   @retval EFI_SUCCESS       This driver is removed ControllerHandle
 446   @retval other             This driver was not removed from this device
 447
 448 **/
 449 EFI_STATUS
 450 EFIAPI
 451 KbdControllerDriverStop (
 452   IN  EFI_DRIVER_BINDING_PROTOCOL    *This,
 453   IN  EFI_HANDLE                     Controller,
 454   IN  UINTN                          NumberOfChildren,
 455   IN  EFI_HANDLE                     *ChildHandleBuffer
 456   )
 457 {
 458   EFI_STATUS                     Status;
 459   EFI_SIMPLE_TEXT_INPUT_PROTOCOL *ConIn;
 460   KEYBOARD_CONSOLE_IN_DEV        *ConsoleIn;
 461   UINT8                          Data;
 462
 463   //
 464   // Disable Keyboard
 465   //
 466   Status = gBS->OpenProtocol (
 467                   Controller,
 468                   &gEfiSimpleTextInProtocolGuid,
 469                   (VOID **) &ConIn,
 470                   This->DriverBindingHandle,
 471                   Controller,
 472                   EFI_OPEN_PROTOCOL_GET_PROTOCOL
 473                   );
 474   if (EFI_ERROR (Status)) {
 475     return Status;
 476   }
 477   Status = gBS->OpenProtocol (
 478                   Controller,
 479                   &gEfiSimpleTextInputExProtocolGuid,
 480                   NULL,
 481                   This->DriverBindingHandle,
 482                   Controller,
 483                   EFI_OPEN_PROTOCOL_TEST_PROTOCOL
 484                   );
 485   if (EFI_ERROR (Status)) {
 486     return Status;
 487   }
 488
 489   ConsoleIn = KEYBOARD_CONSOLE_IN_DEV_FROM_THIS (ConIn);
 490
 491   //
 492   // Report that the keyboard is being disabled
 493   //
 494   REPORT_STATUS_CODE_WITH_DEVICE_PATH (
 495     EFI_PROGRESS_CODE,
 496     EFI_PERIPHERAL_KEYBOARD | EFI_P_PC_DISABLE,
 497     ConsoleIn->DevicePath
 498     );
 499
 500   if (ConsoleIn->TimerEvent != NULL) {
 501     gBS->CloseEvent (ConsoleIn->TimerEvent);
 502     ConsoleIn->TimerEvent = NULL;
 503   }
 504
 505   //
 506   // Since there will be no timer handler for keyboard input any more,
 507   // exhaust input data just in case there is still keyboard data left
 508   //
 509   Status = EFI_SUCCESS;
 510   while (!EFI_ERROR (Status)) {
 511     Status = KeyboardRead (ConsoleIn, &Data);;
 512   }
 513   //
 514   // Uninstall the SimpleTextIn and SimpleTextInEx protocols
 515   //
 516   Status = gBS->UninstallMultipleProtocolInterfaces (
 517                   Controller,
 518                   &gEfiSimpleTextInProtocolGuid,
 519                   &ConsoleIn->ConIn,
 520                   &gEfiSimpleTextInputExProtocolGuid,
 521                   &ConsoleIn->ConInEx,
 522                   NULL
 523                   );
 524   if (EFI_ERROR (Status)) {
 525     return Status;
 526   }
 527
 528   gBS->CloseProtocol (
 529          Controller,
 530          &gEfiDevicePathProtocolGuid,
 531          This->DriverBindingHandle,
 532          Controller
 533          );
 534
 535   gBS->CloseProtocol (
 536          Controller,
 537          &gEfiIsaIoProtocolGuid,
 538          This->DriverBindingHandle,
 539          Controller
 540          );
 541
 542   //
 543   // Free other resources
 544   //
 545   if ((ConsoleIn->ConIn).WaitForKey != NULL) {
 546     gBS->CloseEvent ((ConsoleIn->ConIn).WaitForKey);
 547     (ConsoleIn->ConIn).WaitForKey = NULL;
 548   }
 549   if (ConsoleIn->ConInEx.WaitForKeyEx != NULL) {
 550     gBS->CloseEvent (ConsoleIn->ConInEx.WaitForKeyEx);
 551     ConsoleIn->ConInEx.WaitForKeyEx = NULL;
 552   }
 553   KbdFreeNotifyList (&ConsoleIn->NotifyList);
 554   FreeUnicodeStringTable (ConsoleIn->ControllerNameTable);
 555   gBS->FreePool (ConsoleIn);
 556
 557   return EFI_SUCCESS;
 558 }
 559
 560 /**
 561   Free the waiting key notify list.
 562
 563   @param ListHead  Pointer to list head
 564
 565   @retval EFI_INVALID_PARAMETER  ListHead is NULL
 566   @retval EFI_SUCCESS            Sucess to free NotifyList
 567 **/
 568 EFI_STATUS
 569 KbdFreeNotifyList (
 570   IN OUT LIST_ENTRY           *ListHead
 571   )
 572 {
 573   KEYBOARD_CONSOLE_IN_EX_NOTIFY *NotifyNode;
 574
 575   if (ListHead == NULL) {
 576     return EFI_INVALID_PARAMETER;
 577   }
 578   while (!IsListEmpty (ListHead)) {
 579     NotifyNode = CR (
 580                    ListHead->ForwardLink,
 581                    KEYBOARD_CONSOLE_IN_EX_NOTIFY,
 582                    NotifyEntry,
 583                    KEYBOARD_CONSOLE_IN_EX_NOTIFY_SIGNATURE
 584                    );
 585     RemoveEntryList (ListHead->ForwardLink);
 586     gBS->FreePool (NotifyNode);
 587   }
 588
 589   return EFI_SUCCESS;
 590 }
 591
 592 /**
 593   The module Entry Point for module Ps2Keyboard.
 594
 595   @param[in] ImageHandle    The firmware allocated handle for the EFI image.
 596   @param[in] SystemTable    A pointer to the EFI System Table.
 597
 598   @retval EFI_SUCCESS       The entry point is executed successfully.
 599   @retval other             Some error occurs when executing this entry point.
 600
 601 **/
 602 EFI_STATUS
 603 EFIAPI
 604 InitializePs2Keyboard(
 605   IN EFI_HANDLE           ImageHandle,
 606   IN EFI_SYSTEM_TABLE     *SystemTable
 607   )
 608 {
 609   EFI_STATUS              Status;
 610
 611   //
 612   // Install driver model protocol(s).
 613   //
 614   Status = EfiLibInstallDriverBindingComponentName2 (
 615              ImageHandle,
 616              SystemTable,
 617              &gKeyboardControllerDriver,
 618              ImageHandle,
 619              &gPs2KeyboardComponentName,
 620              &gPs2KeyboardComponentName2
 621              );
 622   ASSERT_EFI_ERROR (Status);
 623
 624
 625   return Status;
 626 }
 627