slimbootloader/BootloaderCommonPkg/Library/ShellLib/CmdMmcDll.c

/** @file
  Shell command `mmcdll` to display system performance data.

  Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
  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 <Library/ShellLib.h>
#include <Library/MmcAccessLib.h>
#include <Library/MmcTuningLib.h>
#include <Library/HobLib.h>
#include <Library/BootloaderCommonLib.h>
#include <Library/VariableLib.h>
#include <Guid/OsBootOptionGuid.h>


/**
  Display performance data.

  @param[in]  Shell        shell instance
  @param[in]  Argc         number of command line arguments
  @param[in]  Argv         command line arguments

  @retval EFI_SUCCESS

**/
STATIC
EFI_STATUS
ShellCommandMmcDllFunc (
  IN SHELL  *Shell,
  IN UINTN   Argc,
  IN CHAR16 *Argv[]
  );

CONST SHELL_COMMAND ShellCommandMmcDll = {
  L"mmcdll",
  L"Tune or print MMC DLL data",
  &ShellCommandMmcDllFunc
};

/**
  Print DLL tuning data.

  @param[in]  TuningData    pointer to tuning data

**/
STATIC
VOID
PrintDllData (
  IN EMMC_TUNING_DATA *TuningData
  )
{
  ShellPrint (L"  HS400 |  TX 0x%02x |  RX 0x%02x\n", TuningData->Hs400TxDataDll, TuningData->Hs400RxStrobe1Dll);
}


/**
  Get MMC base address

  This function returns the base address for MMC device

  @retval UINTN       Return MMC base address if device is found
  @retval NULL        Return NULL if it is NOT found.
**/
UINTN
GetMmcBaseAddress (
  VOID
  )
{
  EFI_HOB_GUID_TYPE             *GuidHob;
  OS_BOOT_OPTION_LIST           *OsBootOptionList;
  OS_BOOT_OPTION                *OsBootOption;
  UINTN                         MmcBaseAddress;
  UINT8                         Index;

  GuidHob = GetNextGuidHob (&gOsBootOptionGuid, GetHobListPtr());
  if (GuidHob == NULL) {
    return 0;
  }

  MmcBaseAddress = 0;
  OsBootOptionList = (OS_BOOT_OPTION_LIST *) GET_GUID_HOB_DATA (GuidHob);
  for (Index = 0; Index < OsBootOptionList->OsBootOptionCount; Index++) {
    OsBootOption = &OsBootOptionList->OsBootOption[Index];
    if (OsBootOption->DevType == OsBootDeviceEmmc) {
      MmcBaseAddress = (UINTN) ( PcdGet64 (PcdPciExpressBaseAddress)  + \
                                 (((OsBootOption->DevAddr >> 16) & 0xFF) << 20) + \
                                 (((OsBootOption->DevAddr >> 8)  & 0xFF) << 15) + \
                                 ((OsBootOption->DevAddr & 0xFF) << 12) \
                                 );
      break;
    }
  }

  return MmcBaseAddress;
}

/**
  Tune or print mmc dll data.

  @param[in]  Shell        shell instance
  @param[in]  Argc         number of command line arguments
  @param[in]  Argv         command line arguments

  @retval EFI_SUCCESS

**/
STATIC
EFI_STATUS
ShellCommandMmcDllFunc (
  IN SHELL  *Shell,
  IN UINTN   Argc,
  IN CHAR16 *Argv[]
  )
{
  EFI_STATUS                Status;
  UINTN                     EmmcHcPciBase;
  EMMC_TUNING_DATA          EmmcTuningData;
  UINT32                    VariableLen;

  if ((Argc < 2) || (Argc > 3)) {
    goto usage;
  }

  if (StrCmp (Argv[1], L"tune") == 0) {
    EmmcHcPciBase = GetMmcBaseAddress();
    if (EmmcHcPciBase == 0) {
      ShellPrint (L"Invalid base address for Mmc device!\n");
      return EFI_ABORTED;
    }

    MmcInitialize (EmmcHcPciBase, DevInitAll);
    MmcTuning (EmmcHcPciBase);
    VariableLen = sizeof (EmmcTuningData);
    Status = GetVariable ("MMCDLL", NULL, &VariableLen, &EmmcTuningData);
    if (EFI_ERROR (Status)) {
      ShellPrint (L"MMC traing fails, not found MMCDLL variable.\n");
      return EFI_DEVICE_ERROR;
    }
    PrintDllData (&EmmcTuningData);
  } else if (StrCmp (Argv[1], L"dump") == 0) {
    ShellPrint (L"Support for dumping dll tuning data will be added shortly!\n");
  } else {
    goto usage;
  }

  return EFI_SUCCESS;

usage:
  ShellPrint (L"Usage: %s <'tune'|'dump'>\n", Argv[0]);
  return EFI_ABORTED;
}