EmulatorPkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / EmulatorPkg / EmuGopDxe / GopDriver.c

/*++ @file\r
\r
Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>\r
Portions copyright (c) 2010,Apple Inc. All rights reserved.<BR>\r
SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
\r
**/\r
\r
#include "Gop.h"\r
\r
\r
EFI_STATUS\r
FreeNotifyList (\r
  IN OUT LIST_ENTRY           *ListHead\r
  )\r
/*++\r
\r
Routine Description:\r
\r
Arguments:\r
\r
  ListHead   - The list head\r
\r
Returns:\r
\r
  EFI_SUCCESS           - Free the notify list successfully\r
  EFI_INVALID_PARAMETER - ListHead is invalid.\r
\r
**/\r
{\r
  EMU_GOP_SIMPLE_TEXTIN_EX_NOTIFY *NotifyNode;\r
\r
  if (ListHead == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
  while (!IsListEmpty (ListHead)) {\r
    NotifyNode = CR (\r
                   ListHead->ForwardLink,\r
                   EMU_GOP_SIMPLE_TEXTIN_EX_NOTIFY,\r
                   NotifyEntry,\r
                   EMU_GOP_SIMPLE_TEXTIN_EX_NOTIFY_SIGNATURE\r
                   );\r
    RemoveEntryList (ListHead->ForwardLink);\r
    gBS->FreePool (NotifyNode);\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
\r
/**\r
  Tests to see if this driver supports a given controller. If a child device is provided,\r
  it further tests to see if this driver supports creating a handle for the specified child device.\r
\r
  This function checks to see if the driver specified by This supports the device specified by\r
  ControllerHandle. Drivers will typically use the device path attached to\r
  ControllerHandle and/or the services from the bus I/O abstraction attached to\r
  ControllerHandle to determine if the driver supports ControllerHandle. This function\r
  may be called many times during platform initialization. In order to reduce boot times, the tests\r
  performed by this function must be very small, and take as little time as possible to execute. This\r
  function must not change the state of any hardware devices, and this function must be aware that the\r
  device specified by ControllerHandle may already be managed by the same driver or a\r
  different driver. This function must match its calls to AllocatePages() with FreePages(),\r
  AllocatePool() with FreePool(), and OpenProtocol() with CloseProtocol().\r
  Because ControllerHandle may have been previously started by the same driver, if a protocol is\r
  already in the opened state, then it must not be closed with CloseProtocol(). This is required\r
  to guarantee the state of ControllerHandle is not modified by this function.\r
\r
  @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r
  @param[in]  ControllerHandle     The handle of the controller to test. This handle\r
                                   must support a protocol interface that supplies\r
                                   an I/O abstraction to the driver.\r
  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This\r
                                   parameter is ignored by device drivers, and is optional for bus\r
                                   drivers. For bus drivers, if this parameter is not NULL, then\r
                                   the bus driver must determine if the bus controller specified\r
                                   by ControllerHandle and the child controller specified\r
                                   by RemainingDevicePath are both supported by this\r
                                   bus driver.\r
\r
  @retval EFI_SUCCESS              The device specified by ControllerHandle and\r
                                   RemainingDevicePath is supported by the driver specified by This.\r
  @retval EFI_ALREADY_STARTED      The device specified by ControllerHandle and\r
                                   RemainingDevicePath is already being managed by the driver\r
                                   specified by This.\r
  @retval EFI_ACCESS_DENIED        The device specified by ControllerHandle and\r
                                   RemainingDevicePath is already being managed by a different\r
                                   driver or an application that requires exclusive access.\r
                                   Currently not implemented.\r
  @retval EFI_UNSUPPORTED          The device specified by ControllerHandle and\r
                                   RemainingDevicePath is not supported by the driver specified by This.\r
**/\r
EFI_STATUS\r
EFIAPI\r
EmuGopDriverBindingSupported (\r
  IN  EFI_DRIVER_BINDING_PROTOCOL     *This,\r
  IN  EFI_HANDLE                      Handle,\r
  IN  EFI_DEVICE_PATH_PROTOCOL        *RemainingDevicePath\r
  )\r
{\r
  EFI_STATUS              Status;\r
  EMU_IO_THUNK_PROTOCOL   *EmuIoThunk;\r
\r
  //\r
  // Open the IO Abstraction(s) needed to perform the supported test\r
  //\r
  Status = gBS->OpenProtocol (\r
                  Handle,\r
                  &gEmuIoThunkProtocolGuid,\r
                  (VOID **)&EmuIoThunk,\r
                  This->DriverBindingHandle,\r
                  Handle,\r
                  EFI_OPEN_PROTOCOL_BY_DRIVER\r
                  );\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  Status = EmuGopSupported (EmuIoThunk);\r
\r
  //\r
  // Close the I/O Abstraction(s) used to perform the supported test\r
  //\r
  gBS->CloseProtocol (\r
        Handle,\r
        &gEmuIoThunkProtocolGuid,\r
        This->DriverBindingHandle,\r
        Handle\r
        );\r
\r
  return Status;\r
}\r
\r
\r
/**\r
  Starts a device controller or a bus controller.\r
\r
  The Start() function is designed to be invoked from the EFI boot service ConnectController().\r
  As a result, much of the error checking on the parameters to Start() has been moved into this\r
  common boot service. It is legal to call Start() from other locations,\r
  but the following calling restrictions must be followed, or the system behavior will not be deterministic.\r
  1. ControllerHandle must be a valid EFI_HANDLE.\r
  2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned\r
     EFI_DEVICE_PATH_PROTOCOL.\r
  3. Prior to calling Start(), the Supported() function for the driver specified by This must\r
     have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.\r
\r
  @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r
  @param[in]  ControllerHandle     The handle of the controller to start. This handle\r
                                   must support a protocol interface that supplies\r
                                   an I/O abstraction to the driver.\r
  @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This\r
                                   parameter is ignored by device drivers, and is optional for bus\r
                                   drivers. For a bus driver, if this parameter is NULL, then handles\r
                                   for all the children of Controller are created by this driver.\r
                                   If this parameter is not NULL and the first Device Path Node is\r
                                   not the End of Device Path Node, then only the handle for the\r
                                   child device specified by the first Device Path Node of\r
                                   RemainingDevicePath is created by this driver.\r
                                   If the first Device Path Node of RemainingDevicePath is\r
                                   the End of Device Path Node, no child handle is created by this\r
                                   driver.\r
\r
  @retval EFI_SUCCESS              The device was started.\r
  @retval EFI_DEVICE_ERROR         The device could not be started due to a device error.Currently not implemented.\r
  @retval EFI_OUT_OF_RESOURCES     The request could not be completed due to a lack of resources.\r
  @retval Others                   The driver failded to start the device.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
EmuGopDriverBindingStart (\r
  IN  EFI_DRIVER_BINDING_PROTOCOL     *This,\r
  IN  EFI_HANDLE                      Handle,\r
  IN  EFI_DEVICE_PATH_PROTOCOL        *RemainingDevicePath\r
  )\r
{\r
  EMU_IO_THUNK_PROTOCOL   *EmuIoThunk;\r
  EFI_STATUS              Status;\r
  GOP_PRIVATE_DATA        *Private;\r
\r
  //\r
  // Grab the protocols we need\r
  //\r
  Status = gBS->OpenProtocol (\r
                  Handle,\r
                  &gEmuIoThunkProtocolGuid,\r
                  (VOID **)&EmuIoThunk,\r
                  This->DriverBindingHandle,\r
                  Handle,\r
                  EFI_OPEN_PROTOCOL_BY_DRIVER\r
                  );\r
  if (EFI_ERROR (Status)) {\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  //\r
  // Allocate Private context data for SGO inteface.\r
  //\r
  Private = NULL;\r
  Status = gBS->AllocatePool (\r
                  EfiBootServicesData,\r
                  sizeof (GOP_PRIVATE_DATA),\r
                  (VOID **)&Private\r
                  );\r
  if (EFI_ERROR (Status)) {\r
    goto Done;\r
  }\r
  //\r
  // Set up context record\r
  //\r
  Private->Signature           = GOP_PRIVATE_DATA_SIGNATURE;\r
  Private->Handle              = Handle;\r
  Private->EmuIoThunk          = EmuIoThunk;\r
  Private->WindowName          = EmuIoThunk->ConfigString;\r
  Private->ControllerNameTable = NULL;\r
\r
  AddUnicodeString (\r
    "eng",\r
    gEmuGopComponentName.SupportedLanguages,\r
    &Private->ControllerNameTable,\r
    EmuIoThunk->ConfigString\r
    );\r
  AddUnicodeString2 (\r
    "en",\r
    gEmuGopComponentName2.SupportedLanguages,\r
    &Private->ControllerNameTable,\r
    EmuIoThunk->ConfigString,\r
    FALSE\r
    );\r
\r
  Status = EmuGopConstructor (Private);\r
  if (EFI_ERROR (Status)) {\r
    goto Done;\r
  }\r
  //\r
  // Publish the Gop interface to the world\r
  //\r
  Status = gBS->InstallMultipleProtocolInterfaces (\r
                  &Private->Handle,\r
                  &gEfiGraphicsOutputProtocolGuid,    &Private->GraphicsOutput,\r
                  &gEfiSimpleTextInProtocolGuid,      &Private->SimpleTextIn,\r
                  &gEfiSimplePointerProtocolGuid,     &Private->SimplePointer,\r
                  &gEfiSimpleTextInputExProtocolGuid, &Private->SimpleTextInEx,\r
                  NULL\r
                  );\r
\r
Done:\r
  if (EFI_ERROR (Status)) {\r
\r
    gBS->CloseProtocol (\r
          Handle,\r
          &gEmuIoThunkProtocolGuid,\r
          This->DriverBindingHandle,\r
          Handle\r
          );\r
\r
    if (Private != NULL) {\r
      //\r
      // On Error Free back private data\r
      //\r
      if (Private->ControllerNameTable != NULL) {\r
        FreeUnicodeStringTable (Private->ControllerNameTable);\r
      }\r
      if (Private->SimpleTextIn.WaitForKey != NULL) {\r
        gBS->CloseEvent (Private->SimpleTextIn.WaitForKey);\r
      }\r
      if (Private->SimpleTextInEx.WaitForKeyEx != NULL) {\r
        gBS->CloseEvent (Private->SimpleTextInEx.WaitForKeyEx);\r
      }\r
      FreeNotifyList (&Private->NotifyList);\r
\r
      gBS->FreePool (Private);\r
    }\r
  }\r
\r
  return Status;\r
}\r
\r
\r
\r
/**\r
  Stops a device controller or a bus controller.\r
\r
  The Stop() function is designed to be invoked from the EFI boot service DisconnectController().\r
  As a result, much of the error checking on the parameters to Stop() has been moved\r
  into this common boot service. It is legal to call Stop() from other locations,\r
  but the following calling restrictions must be followed, or the system behavior will not be deterministic.\r
  1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this\r
     same driver's Start() function.\r
  2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid\r
     EFI_HANDLE. In addition, all of these handles must have been created in this driver's\r
     Start() function, and the Start() function must have called OpenProtocol() on\r
     ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.\r
\r
  @param[in]  This              A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r
  @param[in]  ControllerHandle  A handle to the device being stopped. The handle must\r
                                support a bus specific I/O protocol for the driver\r
                                to use to stop the device.\r
  @param[in]  NumberOfChildren  The number of child device handles in ChildHandleBuffer.\r
  @param[in]  ChildHandleBuffer An array of child handles to be freed. May be NULL\r
                                if NumberOfChildren is 0.\r
\r
  @retval EFI_SUCCESS           The device was stopped.\r
  @retval EFI_DEVICE_ERROR      The device could not be stopped due to a device error.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
EmuGopDriverBindingStop (\r
  IN  EFI_DRIVER_BINDING_PROTOCOL  *This,\r
  IN  EFI_HANDLE                   Handle,\r
  IN  UINTN                        NumberOfChildren,\r
  IN  EFI_HANDLE                   *ChildHandleBuffer\r
  )\r
{\r
  EFI_GRAPHICS_OUTPUT_PROTOCOL *GraphicsOutput;\r
  EFI_STATUS                   Status;\r
  GOP_PRIVATE_DATA             *Private;\r
\r
  Status = gBS->OpenProtocol (\r
                  Handle,\r
                  &gEfiGraphicsOutputProtocolGuid,\r
                  (VOID **)&GraphicsOutput,\r
                  This->DriverBindingHandle,\r
                  Handle,\r
                  EFI_OPEN_PROTOCOL_GET_PROTOCOL\r
                  );\r
  if (EFI_ERROR (Status)) {\r
    //\r
    // If the GOP interface does not exist the driver is not started\r
    //\r
    return EFI_NOT_STARTED;\r
  }\r
\r
  //\r
  // Get our private context information\r
  //\r
  Private = GOP_PRIVATE_DATA_FROM_THIS (GraphicsOutput);\r
\r
  //\r
  // Remove the SGO interface from the system\r
  //\r
  Status = gBS->UninstallMultipleProtocolInterfaces (\r
                  Private->Handle,\r
                  &gEfiGraphicsOutputProtocolGuid,    &Private->GraphicsOutput,\r
                  &gEfiSimpleTextInProtocolGuid,      &Private->SimpleTextIn,\r
                  &gEfiSimplePointerProtocolGuid,     &Private->SimplePointer,\r
                  &gEfiSimpleTextInputExProtocolGuid, &Private->SimpleTextInEx,\r
                  NULL\r
                  );\r
  if (!EFI_ERROR (Status)) {\r
    //\r
    // Shutdown the hardware\r
    //\r
    Status = EmuGopDestructor (Private);\r
    if (EFI_ERROR (Status)) {\r
      return EFI_DEVICE_ERROR;\r
    }\r
\r
    gBS->CloseProtocol (\r
          Handle,\r
          &gEmuIoThunkProtocolGuid,\r
          This->DriverBindingHandle,\r
          Handle\r
          );\r
\r
    //\r
    // Free our instance data\r
    //\r
    FreeUnicodeStringTable (Private->ControllerNameTable);\r
\r
    Status = gBS->CloseEvent (Private->SimpleTextIn.WaitForKey);\r
    ASSERT_EFI_ERROR (Status);\r
\r
    Status = gBS->CloseEvent (Private->SimpleTextInEx.WaitForKeyEx);\r
    ASSERT_EFI_ERROR (Status);\r
\r
    FreeNotifyList (&Private->NotifyList);\r
\r
    gBS->FreePool (Private);\r
\r
  }\r
\r
  return Status;\r
}\r
\r
\r
///\r
/// This protocol provides the services required to determine if a driver supports a given controller.\r
/// If a controller is supported, then it also provides routines to start and stop the controller.\r
///\r
EFI_DRIVER_BINDING_PROTOCOL gEmuGopDriverBinding = {\r
  EmuGopDriverBindingSupported,\r
  EmuGopDriverBindingStart,\r
  EmuGopDriverBindingStop,\r
  0xa,\r
  NULL,\r
  NULL\r
};\r
\r
\r
\r
/**\r
  The user Entry Point for module EmuGop. The user code starts with this function.\r
\r
  @param[in] ImageHandle    The firmware allocated handle for the EFI image.\r
  @param[in] SystemTable    A pointer to the EFI System Table.\r
\r
  @retval EFI_SUCCESS       The entry point is executed successfully.\r
  @retval other             Some error occurs when executing this entry point.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
InitializeEmuGop (\r
  IN EFI_HANDLE           ImageHandle,\r
  IN EFI_SYSTEM_TABLE     *SystemTable\r
  )\r
{\r
  EFI_STATUS              Status;\r
\r
  Status = EfiLibInstallDriverBindingComponentName2 (\r
             ImageHandle,\r
             SystemTable,\r
             &gEmuGopDriverBinding,\r
             ImageHandle,\r
             &gEmuGopComponentName,\r
             &gEmuGopComponentName2\r
             );\r
  ASSERT_EFI_ERROR (Status);\r
\r
\r
  return Status;\r
}\r
\r