system76-edk2/EdkModulePkg/Bus/Pci/CirrusLogic/Dxe/ComponentName.c

/** @file
  Copyright (c) 2006, Intel Corporation                                                         
  All rights reserved. This program and the accompanying materials                          
  are licensed and made available under the terms and conditions of the BSD License         
  which accompanies this distribution.  The full text of the license may be found at        
  http://opensource.org/licenses/bsd-license.php                                            

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             

**/

#include "CirrusLogic5430.h"

//
// EFI Component Name Protocol
//
EFI_COMPONENT_NAME_PROTOCOL     gCirrusLogic5430ComponentName = {
  CirrusLogic5430ComponentNameGetDriverName,
  CirrusLogic5430ComponentNameGetControllerName,
  "eng"
};

static EFI_UNICODE_STRING_TABLE mCirrusLogic5430DriverNameTable[] = {
  { "eng", (CHAR16 *) L"Cirrus Logic 5430 UGA Driver" },
  { NULL , NULL }
};

static EFI_UNICODE_STRING_TABLE mCirrusLogic5430ControllerNameTable[] = {
  { "eng", (CHAR16 *) L"Cirrus Logic 5430 PCI Adapter" },
  { NULL , NULL }
};

/**
  Retrieves a Unicode string that is the user readable name of the EFI Driver.

  @param  This A pointer to the EFI_COMPONENT_NAME_PROTOCOL instance.
  @param  Language A pointer to a three character ISO 639-2 language identifier.
  This is the language of the driver name that that the caller
  is requesting, and it must match one of the languages specified
  in SupportedLanguages.  The number of languages supported by a
  driver is up to the driver writer.
  @param  DriverName A pointer to the Unicode string to return.  This Unicode string
  is the name of the driver specified by This in the language
  specified by Language.

  @retval  EFI_SUCCESS The Unicode string for the Driver specified by This
  and the language specified by Language was returned
  in DriverName.
  @retval  EFI_INVALID_PARAMETER Language is NULL.
  @retval  EFI_INVALID_PARAMETER DriverName is NULL.
  @retval  EFI_UNSUPPORTED The driver specified by This does not support the
  language specified by Language.

**/
EFI_STATUS
EFIAPI
CirrusLogic5430ComponentNameGetDriverName (
  IN  EFI_COMPONENT_NAME_PROTOCOL  *This,
  IN  CHAR8                        *Language,
  OUT CHAR16                       **DriverName
  )
{
  return LookupUnicodeString (
          Language,
          gCirrusLogic5430ComponentName.SupportedLanguages,
          mCirrusLogic5430DriverNameTable,
          DriverName
          );
}

/**
  Retrieves a Unicode string that is the user readable name of the controller
  that is being managed by an EFI Driver.

  @param  This A pointer to the EFI_COMPONENT_NAME_PROTOCOL instance.
  @param  ControllerHandle The handle of a controller that the driver specified by
  This is managing.  This handle specifies the controller
  whose name is to be returned.
  @param  ChildHandle The handle of the child controller to retrieve the name
  of.  This is an optional parameter that may be NULL.  It
  will be NULL for device drivers.  It will also be NULL
  for a bus drivers that wish to retrieve the name of the
  bus controller.  It will not be NULL for a bus driver
  that wishes to retrieve the name of a child controller.
  @param  Language A pointer to a three character ISO 639-2 language
  identifier.  This is the language of the controller name
  that that the caller is requesting, and it must match one
  of the languages specified in SupportedLanguages.  The
  number of languages supported by a driver is up to the
  driver writer.
  @param  ControllerName A pointer to the Unicode string to return.  This Unicode
  string is the name of the controller specified by
  ControllerHandle and ChildHandle in the language specified
  by Language from the point of view of the driver specified
  by This.

  @retval  EFI_SUCCESS The Unicode string for the user readable name in the
  language specified by Language for the driver
  specified by This was returned in DriverName.
  @retval  EFI_INVALID_PARAMETER ControllerHandle is not a valid EFI_HANDLE.
  @retval  EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid EFI_HANDLE.
  @retval  EFI_INVALID_PARAMETER Language is NULL.
  @retval  EFI_INVALID_PARAMETER ControllerName is NULL.
  @retval  EFI_UNSUPPORTED The driver specified by This is not currently managing
  the controller specified by ControllerHandle and
  ChildHandle.
  @retval  EFI_UNSUPPORTED The driver specified by This does not support the
  language specified by Language.

**/
EFI_STATUS
EFIAPI
CirrusLogic5430ComponentNameGetControllerName (
  IN  EFI_COMPONENT_NAME_PROTOCOL                     *This,
  IN  EFI_HANDLE                                      ControllerHandle,
  IN  EFI_HANDLE                                      ChildHandle        OPTIONAL,
  IN  CHAR8                                           *Language,
  OUT CHAR16                                          **ControllerName
  )
{
  EFI_UGA_DRAW_PROTOCOL           *UgaDraw;
  EFI_STATUS                      Status;
  EFI_PCI_IO_PROTOCOL             *PciIoProtocol;

  //
  // This is a device driver, so ChildHandle must be NULL.
  //
  if (ChildHandle != NULL) {
    return EFI_UNSUPPORTED;
  }

  //
  // Check Controller's handle
  //
  Status = gBS->OpenProtocol (
                  ControllerHandle,
                  &gEfiPciIoProtocolGuid,
                  (VOID **) &PciIoProtocol,
                  gCirrusLogic5430DriverBinding.DriverBindingHandle,
                  ControllerHandle,
                  EFI_OPEN_PROTOCOL_BY_DRIVER
                  );
  if (!EFI_ERROR (Status)) {
    gBS->CloseProtocol (
          ControllerHandle,
          &gEfiPciIoProtocolGuid,
          gCirrusLogic5430DriverBinding.DriverBindingHandle,
          ControllerHandle
          );

    return EFI_UNSUPPORTED;
  }

  if (Status != EFI_ALREADY_STARTED) {
    return EFI_UNSUPPORTED;
  }

  //
  // Get the UGA Draw Protocol on Controller
  //
  Status = gBS->OpenProtocol (
                  ControllerHandle,
                  &gEfiUgaDrawProtocolGuid,
                  (VOID **) &UgaDraw,
                  gCirrusLogic5430DriverBinding.DriverBindingHandle,
                  ControllerHandle,
                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
                  );
  if (EFI_ERROR (Status)) {
    return Status;
  }

  //
  // Get the Cirrus Logic 5430's Device structure
  //
  return LookupUnicodeString (
          Language,
          gCirrusLogic5430ComponentName.SupportedLanguages,
          mCirrusLogic5430ControllerNameTable,
          ControllerName
          );
}