/** @file
This is an example of how a driver retrieve HII data using HII Package List
Protocol, and how to publish the HII data.

Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include <Uefi.h>
#include <Guid/HiiResourceSampleHii.h>
#include <Protocol/HiiPackageList.h>
#include <Library/DevicePathLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiHiiServicesLib.h>
#include <Library/HiiLib.h>

#pragma pack(1)
///
/// HII specific Vendor Device Path definition.
///
typedef struct {
  VENDOR_DEVICE_PATH             VendorDevicePath;
  EFI_DEVICE_PATH_PROTOCOL       End;
} HII_VENDOR_DEVICE_PATH;
#pragma pack()


EFI_HII_HANDLE  mHiiHandle = NULL;
EFI_HANDLE      mDriverHandle = NULL;

HII_VENDOR_DEVICE_PATH  mHiiVendorDevicePath = {
  {
    {
      HARDWARE_DEVICE_PATH,
      HW_VENDOR_DP,
      {
        (UINT8) (sizeof (VENDOR_DEVICE_PATH)),
        (UINT8) ((sizeof (VENDOR_DEVICE_PATH)) >> 8)
      }
    },
    HII_RESOURCE_SAMPLE_FORM_SET_GUID
  },
  {
    END_DEVICE_PATH_TYPE,
    END_ENTIRE_DEVICE_PATH_SUBTYPE,
    {
      (UINT8) (END_DEVICE_PATH_LENGTH),
      (UINT8) ((END_DEVICE_PATH_LENGTH) >> 8)
    }
  }
};

/**
  Main entry for this driver.

  @param[in] ImageHandle     Image handle this driver.
  @param[in] SystemTable     Pointer to SystemTable.

  @retval EFI_SUCESS     This function always complete successfully.

**/
EFI_STATUS
EFIAPI
HiiResourcesSampleInit (
  IN EFI_HANDLE                   ImageHandle,
  IN EFI_SYSTEM_TABLE             *SystemTable
  )
{
  EFI_STATUS                      Status;
  EFI_HII_PACKAGE_LIST_HEADER     *PackageList;

  //
  // Retrieve HII package list from ImageHandle
  //
  Status = gBS->OpenProtocol (
                  ImageHandle,
                  &gEfiHiiPackageListProtocolGuid,
                  (VOID **) &PackageList,
                  ImageHandle,
                  NULL,
                  EFI_OPEN_PROTOCOL_GET_PROTOCOL
                  );
  if (EFI_ERROR (Status)) {
    return Status;
  }

  //
  // Publish sample Fromset
  //
  Status = gBS->InstallProtocolInterface (
                  &mDriverHandle,
                  &gEfiDevicePathProtocolGuid,
                  EFI_NATIVE_INTERFACE,
                  &mHiiVendorDevicePath
                  );
  if (EFI_ERROR (Status)) {
    return Status;
  }

  //
  // Publish HII package list to HII Database.
  //
  Status = gHiiDatabase->NewPackageList (
                          gHiiDatabase,
                          PackageList,
                          mDriverHandle,
                          &mHiiHandle
                          );
  if (EFI_ERROR (Status)) {
    return Status;
  }

  return EFI_SUCCESS;
}

/**
  Unloads the application and its installed protocol.

  @param[in]  ImageHandle       Handle that identifies the image to be unloaded.

  @retval EFI_SUCCESS           The image has been unloaded.
**/
EFI_STATUS
EFIAPI
HiiResourcesSampleUnload (
  IN EFI_HANDLE  ImageHandle
  )
{
  if (mDriverHandle != NULL) {
    gBS->UninstallProtocolInterface (
            mDriverHandle,
            &gEfiDevicePathProtocolGuid,
            &mHiiVendorDevicePath
           );
    mDriverHandle = NULL;
  }

  if (mHiiHandle != NULL) {
    HiiRemovePackages (mHiiHandle);
    mHiiHandle = NULL;
  }

  return EFI_SUCCESS;
}