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 - 2010, 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->ScancodeBufStartPos    = 0;
 247   ConsoleIn->ScancodeBufEndPos      = KEYBOARD_BUFFER_MAX_COUNT - 1;
 248   ConsoleIn->ScancodeBufCount       = 0;
 249   ConsoleIn->Ctrled                 = FALSE;
 250   ConsoleIn->Alted                  = FALSE;
 251   ConsoleIn->DevicePath             = ParentDevicePath;
 252
 253   ConsoleIn->ConInEx.Reset               = KeyboardEfiResetEx;
 254   ConsoleIn->ConInEx.ReadKeyStrokeEx     = KeyboardReadKeyStrokeEx;
 255   ConsoleIn->ConInEx.SetState            = KeyboardSetState;
 256   ConsoleIn->ConInEx.RegisterKeyNotify   = KeyboardRegisterKeyNotify;
 257   ConsoleIn->ConInEx.UnregisterKeyNotify = KeyboardUnregisterKeyNotify;
 258
 259   InitializeListHead (&ConsoleIn->NotifyList);
 260
 261   //
 262   // Fix for random hangs in System waiting for the Key if no KBC is present in BIOS.
 263   //
 264   KeyboardRead (ConsoleIn, &Data);
 265   if ((KeyReadStatusRegister (ConsoleIn) & (KBC_PARE | KBC_TIM)) == (KBC_PARE | KBC_TIM)) {
 266     //
 267     // If nobody decodes KBC I/O port, it will read back as 0xFF.
 268     // Check the Time-Out and Parity bit to see if it has an active KBC in system
 269     //
 270     Status      = EFI_DEVICE_ERROR;
 271     StatusCode  = EFI_PERIPHERAL_KEYBOARD | EFI_P_EC_NOT_DETECTED;
 272     goto ErrorExit;
 273   }
 274
 275   //
 276   // Setup the WaitForKey event
 277   //
 278   Status = gBS->CreateEvent (
 279                   EVT_NOTIFY_WAIT,
 280                   TPL_NOTIFY,
 281                   KeyboardWaitForKey,
 282                   &(ConsoleIn->ConIn),
 283                   &((ConsoleIn->ConIn).WaitForKey)
 284                   );
 285   if (EFI_ERROR (Status)) {
 286     Status      = EFI_OUT_OF_RESOURCES;
 287     StatusCode  = EFI_PERIPHERAL_KEYBOARD | EFI_P_EC_CONTROLLER_ERROR;
 288     goto ErrorExit;
 289   }
 290   //
 291   // Setup the WaitForKeyEx event
 292   //
 293   Status = gBS->CreateEvent (
 294                   EVT_NOTIFY_WAIT,
 295                   TPL_NOTIFY,
 296                   KeyboardWaitForKeyEx,
 297                   &(ConsoleIn->ConInEx),
 298                   &(ConsoleIn->ConInEx.WaitForKeyEx)
 299                   );
 300   if (EFI_ERROR (Status)) {
 301     Status      = EFI_OUT_OF_RESOURCES;
 302     StatusCode  = EFI_PERIPHERAL_KEYBOARD | EFI_P_EC_CONTROLLER_ERROR;
 303     goto ErrorExit;
 304   }
 305   // Setup a periodic timer, used for reading keystrokes at a fixed interval
 306   //
 307   Status = gBS->CreateEvent (
 308                   EVT_TIMER | EVT_NOTIFY_SIGNAL,
 309                   TPL_NOTIFY,
 310                   KeyboardTimerHandler,
 311                   ConsoleIn,
 312                   &ConsoleIn->TimerEvent
 313                   );
 314   if (EFI_ERROR (Status)) {
 315     Status      = EFI_OUT_OF_RESOURCES;
 316     StatusCode  = EFI_PERIPHERAL_KEYBOARD | EFI_P_EC_CONTROLLER_ERROR;
 317     goto ErrorExit;
 318   }
 319
 320   Status = gBS->SetTimer (
 321                   ConsoleIn->TimerEvent,
 322                   TimerPeriodic,
 323                   KEYBOARD_TIMER_INTERVAL
 324                   );
 325   if (EFI_ERROR (Status)) {
 326     Status      = EFI_OUT_OF_RESOURCES;
 327     StatusCode  = EFI_PERIPHERAL_KEYBOARD | EFI_P_EC_CONTROLLER_ERROR;
 328     goto ErrorExit;
 329   }
 330
 331   REPORT_STATUS_CODE_WITH_DEVICE_PATH (
 332     EFI_PROGRESS_CODE,
 333     EFI_PERIPHERAL_KEYBOARD | EFI_P_PC_PRESENCE_DETECT,
 334     ParentDevicePath
 335     );
 336
 337   //
 338   // Reset the keyboard device
 339   //
 340   Status = ConsoleIn->ConInEx.Reset (&ConsoleIn->ConInEx, TRUE);
 341   if (EFI_ERROR (Status)) {
 342     Status      = EFI_DEVICE_ERROR;
 343     StatusCode  = EFI_PERIPHERAL_KEYBOARD | EFI_P_EC_NOT_DETECTED;
 344     goto ErrorExit;
 345   }
 346
 347   ConsoleIn->ControllerNameTable = NULL;
 348   AddUnicodeString2 (
 349     "eng",
 350     gPs2KeyboardComponentName.SupportedLanguages,
 351     &ConsoleIn->ControllerNameTable,
 352     L"PS/2 Keyboard Device",
 353     TRUE
 354     );
 355   AddUnicodeString2 (
 356     "en",
 357     gPs2KeyboardComponentName2.SupportedLanguages,
 358     &ConsoleIn->ControllerNameTable,
 359     L"PS/2 Keyboard Device",
 360     FALSE
 361     );
 362
 363
 364   //
 365   // Install protocol interfaces for the keyboard device.
 366   //
 367   Status = gBS->InstallMultipleProtocolInterfaces (
 368                   &Controller,
 369                   &gEfiSimpleTextInProtocolGuid,
 370                   &ConsoleIn->ConIn,
 371                   &gEfiSimpleTextInputExProtocolGuid,
 372                   &ConsoleIn->ConInEx,
 373                   NULL
 374                   );
 375   if (EFI_ERROR (Status)) {
 376     StatusCode = EFI_PERIPHERAL_KEYBOARD | EFI_P_EC_CONTROLLER_ERROR;
 377     goto ErrorExit;
 378   }
 379
 380   return Status;
 381
 382 ErrorExit:
 383   //
 384   // Report error code
 385   //
 386   if (StatusCode != 0) {
 387     REPORT_STATUS_CODE_WITH_DEVICE_PATH (
 388       EFI_ERROR_CODE | EFI_ERROR_MINOR,
 389       StatusCode,
 390       ParentDevicePath
 391       );
 392   }
 393
 394   if ((ConsoleIn != NULL) && (ConsoleIn->ConIn.WaitForKey != NULL)) {
 395     gBS->CloseEvent (ConsoleIn->ConIn.WaitForKey);
 396   }
 397
 398   if ((ConsoleIn != NULL) && (ConsoleIn->TimerEvent != NULL)) {
 399     gBS->CloseEvent (ConsoleIn->TimerEvent);
 400   }
 401   if ((ConsoleIn != NULL) && (ConsoleIn->ConInEx.WaitForKeyEx != NULL)) {
 402     gBS->CloseEvent (ConsoleIn->ConInEx.WaitForKeyEx);
 403   }
 404   KbdFreeNotifyList (&ConsoleIn->NotifyList);
 405   if ((ConsoleIn != NULL) && (ConsoleIn->ControllerNameTable != NULL)) {
 406     FreeUnicodeStringTable (ConsoleIn->ControllerNameTable);
 407   }
 408   //
 409   // Since there will be no timer handler for keyboard input any more,
 410   // exhaust input data just in case there is still keyboard data left
 411   //
 412   if (ConsoleIn != NULL) {
 413     Status1 = EFI_SUCCESS;
 414     while (!EFI_ERROR (Status1) && (Status != EFI_DEVICE_ERROR)) {
 415       Status1 = KeyboardRead (ConsoleIn, &Data);;
 416     }
 417   }
 418
 419   if (ConsoleIn != NULL) {
 420     gBS->FreePool (ConsoleIn);
 421   }
 422
 423   gBS->CloseProtocol (
 424          Controller,
 425          &gEfiDevicePathProtocolGuid,
 426          This->DriverBindingHandle,
 427          Controller
 428          );
 429
 430   gBS->CloseProtocol (
 431          Controller,
 432          &gEfiIsaIoProtocolGuid,
 433          This->DriverBindingHandle,
 434          Controller
 435          );
 436
 437   return Status;
 438 }
 439
 440 /**
 441   Stop this driver on ControllerHandle. Support stoping any child handles
 442   created by this driver.
 443
 444   @param  This              Protocol instance pointer.
 445   @param  ControllerHandle  Handle of device to stop driver on
 446   @param  NumberOfChildren  Number of Handles in ChildHandleBuffer. If number of
 447                             children is zero stop the entire bus driver.
 448   @param  ChildHandleBuffer List of Child Handles to Stop.
 449
 450   @retval EFI_SUCCESS       This driver is removed ControllerHandle
 451   @retval other             This driver was not removed from this device
 452
 453 **/
 454 EFI_STATUS
 455 EFIAPI
 456 KbdControllerDriverStop (
 457   IN  EFI_DRIVER_BINDING_PROTOCOL    *This,
 458   IN  EFI_HANDLE                     Controller,
 459   IN  UINTN                          NumberOfChildren,
 460   IN  EFI_HANDLE                     *ChildHandleBuffer
 461   )
 462 {
 463   EFI_STATUS                     Status;
 464   EFI_SIMPLE_TEXT_INPUT_PROTOCOL *ConIn;
 465   KEYBOARD_CONSOLE_IN_DEV        *ConsoleIn;
 466   UINT8                          Data;
 467
 468   //
 469   // Disable Keyboard
 470   //
 471   Status = gBS->OpenProtocol (
 472                   Controller,
 473                   &gEfiSimpleTextInProtocolGuid,
 474                   (VOID **) &ConIn,
 475                   This->DriverBindingHandle,
 476                   Controller,
 477                   EFI_OPEN_PROTOCOL_GET_PROTOCOL
 478                   );
 479   if (EFI_ERROR (Status)) {
 480     return Status;
 481   }
 482   Status = gBS->OpenProtocol (
 483                   Controller,
 484                   &gEfiSimpleTextInputExProtocolGuid,
 485                   NULL,
 486                   This->DriverBindingHandle,
 487                   Controller,
 488                   EFI_OPEN_PROTOCOL_TEST_PROTOCOL
 489                   );
 490   if (EFI_ERROR (Status)) {
 491     return Status;
 492   }
 493
 494   ConsoleIn = KEYBOARD_CONSOLE_IN_DEV_FROM_THIS (ConIn);
 495
 496   //
 497   // Report that the keyboard is being disabled
 498   //
 499   REPORT_STATUS_CODE_WITH_DEVICE_PATH (
 500     EFI_PROGRESS_CODE,
 501     EFI_PERIPHERAL_KEYBOARD | EFI_P_PC_DISABLE,
 502     ConsoleIn->DevicePath
 503     );
 504
 505   if (ConsoleIn->TimerEvent != NULL) {
 506     gBS->CloseEvent (ConsoleIn->TimerEvent);
 507     ConsoleIn->TimerEvent = NULL;
 508   }
 509   //
 510   // Disable the keyboard interface
 511   //
 512   Status = DisableKeyboard (ConsoleIn);
 513
 514   //
 515   // Since there will be no timer handler for keyboard input any more,
 516   // exhaust input data just in case there is still keyboard data left
 517   //
 518   Status = EFI_SUCCESS;
 519   while (!EFI_ERROR (Status)) {
 520     Status = KeyboardRead (ConsoleIn, &Data);;
 521   }
 522   //
 523   // Uninstall the SimpleTextIn and SimpleTextInEx protocols
 524   //
 525   Status = gBS->UninstallMultipleProtocolInterfaces (
 526                   Controller,
 527                   &gEfiSimpleTextInProtocolGuid,
 528                   &ConsoleIn->ConIn,
 529                   &gEfiSimpleTextInputExProtocolGuid,
 530                   &ConsoleIn->ConInEx,
 531                   NULL
 532                   );
 533   if (EFI_ERROR (Status)) {
 534     return Status;
 535   }
 536
 537   gBS->CloseProtocol (
 538          Controller,
 539          &gEfiDevicePathProtocolGuid,
 540          This->DriverBindingHandle,
 541          Controller
 542          );
 543
 544   gBS->CloseProtocol (
 545          Controller,
 546          &gEfiIsaIoProtocolGuid,
 547          This->DriverBindingHandle,
 548          Controller
 549          );
 550
 551   //
 552   // Free other resources
 553   //
 554   if ((ConsoleIn->ConIn).WaitForKey != NULL) {
 555     gBS->CloseEvent ((ConsoleIn->ConIn).WaitForKey);
 556     (ConsoleIn->ConIn).WaitForKey = NULL;
 557   }
 558   if (ConsoleIn->ConInEx.WaitForKeyEx != NULL) {
 559     gBS->CloseEvent (ConsoleIn->ConInEx.WaitForKeyEx);
 560     ConsoleIn->ConInEx.WaitForKeyEx = NULL;
 561   }
 562   KbdFreeNotifyList (&ConsoleIn->NotifyList);
 563   FreeUnicodeStringTable (ConsoleIn->ControllerNameTable);
 564   gBS->FreePool (ConsoleIn);
 565
 566   return EFI_SUCCESS;
 567 }
 568
 569 /**
 570   Free the waiting key notify list.
 571
 572   @param ListHead  Pointer to list head
 573
 574   @retval EFI_INVALID_PARAMETER  ListHead is NULL
 575   @retval EFI_SUCCESS            Sucess to free NotifyList
 576 **/
 577 EFI_STATUS
 578 KbdFreeNotifyList (
 579   IN OUT LIST_ENTRY           *ListHead
 580   )
 581 {
 582   KEYBOARD_CONSOLE_IN_EX_NOTIFY *NotifyNode;
 583
 584   if (ListHead == NULL) {
 585     return EFI_INVALID_PARAMETER;
 586   }
 587   while (!IsListEmpty (ListHead)) {
 588     NotifyNode = CR (
 589                    ListHead->ForwardLink,
 590                    KEYBOARD_CONSOLE_IN_EX_NOTIFY,
 591                    NotifyEntry,
 592                    KEYBOARD_CONSOLE_IN_EX_NOTIFY_SIGNATURE
 593                    );
 594     RemoveEntryList (ListHead->ForwardLink);
 595     gBS->FreePool (NotifyNode);
 596   }
 597
 598   return EFI_SUCCESS;
 599 }
 600
 601 /**
 602   The module Entry Point for module Ps2Keyboard.
 603
 604   @param[in] ImageHandle    The firmware allocated handle for the EFI image.
 605   @param[in] SystemTable    A pointer to the EFI System Table.
 606
 607   @retval EFI_SUCCESS       The entry point is executed successfully.
 608   @retval other             Some error occurs when executing this entry point.
 609
 610 **/
 611 EFI_STATUS
 612 EFIAPI
 613 InitializePs2Keyboard(
 614   IN EFI_HANDLE           ImageHandle,
 615   IN EFI_SYSTEM_TABLE     *SystemTable
 616   )
 617 {
 618   EFI_STATUS              Status;
 619
 620   //
 621   // Install driver model protocol(s).
 622   //
 623   Status = EfiLibInstallDriverBindingComponentName2 (
 624              ImageHandle,
 625              SystemTable,
 626              &gKeyboardControllerDriver,
 627              ImageHandle,
 628              &gPs2KeyboardComponentName,
 629              &gPs2KeyboardComponentName2
 630              );
 631   ASSERT_EFI_ERROR (Status);
 632
 633
 634   return Status;
 635 }
 636