[mirror_edk2.git] / EmbeddedPkg / Universal / MmcDxe / MmcIdentification.c

/** @file\r
*\r
*  Copyright (c) 2011-2015, ARM Limited. All rights reserved.\r
*\r
*  This program and the accompanying materials\r
*  are licensed and made available under the terms and conditions of the BSD License\r
*  which accompanies this distribution.  The full text of the license may be found at\r
*  http://opensource.org/licenses/bsd-license.php\r
*\r
*  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
*  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
*\r
**/\r
\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/TimerLib.h>\r
\r
#include "Mmc.h"\r
\r
typedef union {\r
  UINT32 Raw;\r
  OCR    Ocr;\r
} OCR_RESPONSE;\r
\r
#define MAX_RETRY_COUNT         1000\r
#define CMD_RETRY_COUNT         20\r
#define RCA_SHIFT_OFFSET        16\r
#define EMMC_CARD_SIZE          512\r
#define EMMC_ECSD_SIZE_OFFSET   53\r
\r
#define EXTCSD_BUS_WIDTH        183\r
#define EXTCSD_HS_TIMING        185\r
\r
#define EMMC_TIMING_BACKWARD    0\r
#define EMMC_TIMING_HS          1\r
#define EMMC_TIMING_HS200       2\r
#define EMMC_TIMING_HS400       3\r
\r
#define EMMC_BUS_WIDTH_1BIT     0\r
#define EMMC_BUS_WIDTH_4BIT     1\r
#define EMMC_BUS_WIDTH_8BIT     2\r
#define EMMC_BUS_WIDTH_DDR_4BIT 5\r
#define EMMC_BUS_WIDTH_DDR_8BIT 6\r
\r
#define EMMC_SWITCH_ERROR       (1 << 7)\r
\r
#define SD_BUS_WIDTH_1BIT       (1 << 0)\r
#define SD_BUS_WIDTH_4BIT       (1 << 2)\r
\r
#define SD_CCC_SWITCH           (1 << 10)\r
\r
#define DEVICE_STATE(x)         (((x) >> 9) & 0xf)\r
typedef enum _EMMC_DEVICE_STATE {\r
  EMMC_IDLE_STATE = 0,\r
  EMMC_READY_STATE,\r
  EMMC_IDENT_STATE,\r
  EMMC_STBY_STATE,\r
  EMMC_TRAN_STATE,\r
  EMMC_DATA_STATE,\r
  EMMC_RCV_STATE,\r
  EMMC_PRG_STATE,\r
  EMMC_DIS_STATE,\r
  EMMC_BTST_STATE,\r
  EMMC_SLP_STATE\r
} EMMC_DEVICE_STATE;\r
\r
UINT32 mEmmcRcaCount = 0;\r
\r
STATIC\r
EFI_STATUS\r
EFIAPI\r
EmmcGetDeviceState (\r
  IN  MMC_HOST_INSTANCE    *MmcHostInstance,\r
  OUT EMMC_DEVICE_STATE    *State\r
  )\r
{\r
  EFI_MMC_HOST_PROTOCOL *Host;\r
  EFI_STATUS Status;\r
  UINT32     Data, RCA;\r
\r
  if (State == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  Host = MmcHostInstance->MmcHost;\r
  RCA = MmcHostInstance->CardInfo.RCA << RCA_SHIFT_OFFSET;\r
  Status = Host->SendCommand (Host, MMC_CMD13, RCA);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "EmmcGetDeviceState(): Failed to get card status, Status=%r.\n", Status));\r
    return Status;\r
  }\r
  Status = Host->ReceiveResponse (Host, MMC_RESPONSE_TYPE_R1, &Data);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "EmmcGetDeviceState(): Failed to get response of CMD13, Status=%r.\n", Status));\r
    return Status;\r
  }\r
  if (Data & EMMC_SWITCH_ERROR) {\r
    DEBUG ((EFI_D_ERROR, "EmmcGetDeviceState(): Failed to switch expected mode, Status=%r.\n", Status));\r
    return EFI_DEVICE_ERROR;\r
  }\r
  *State = DEVICE_STATE(Data);\r
  return EFI_SUCCESS;\r
}\r
\r
STATIC\r
EFI_STATUS\r
EFIAPI\r
EmmcSetEXTCSD (\r
  IN MMC_HOST_INSTANCE     *MmcHostInstance,\r
  UINT32                   ExtCmdIndex,\r
  UINT32                   Value\r
  )\r
{\r
  EFI_MMC_HOST_PROTOCOL *Host;\r
  EMMC_DEVICE_STATE     State;\r
  EFI_STATUS Status;\r
  UINT32     Argument;\r
\r
  Host  = MmcHostInstance->MmcHost;\r
  Argument = EMMC_CMD6_ARG_ACCESS(3) | EMMC_CMD6_ARG_INDEX(ExtCmdIndex) |\r
             EMMC_CMD6_ARG_VALUE(Value) | EMMC_CMD6_ARG_CMD_SET(1);\r
  Status = Host->SendCommand (Host, MMC_CMD6, Argument);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "EmmcSetEXTCSD(): Failed to send CMD6, Status=%r.\n", Status));\r
    return Status;\r
  }\r
  // Make sure device exiting prog mode\r
  do {\r
    Status = EmmcGetDeviceState (MmcHostInstance, &State);\r
    if (EFI_ERROR (Status)) {\r
      DEBUG ((EFI_D_ERROR, "EmmcSetEXTCSD(): Failed to get device state, Status=%r.\n", Status));\r
      return Status;\r
    }\r
  } while (State == EMMC_PRG_STATE);\r
  return EFI_SUCCESS;\r
}\r
\r
STATIC\r
EFI_STATUS\r
EFIAPI\r
EmmcIdentificationMode (\r
  IN MMC_HOST_INSTANCE     *MmcHostInstance,\r
  IN OCR_RESPONSE           Response\r
  )\r
{\r
  EFI_MMC_HOST_PROTOCOL *Host;\r
  EFI_BLOCK_IO_MEDIA    *Media;\r
  EFI_STATUS Status;\r
  EMMC_DEVICE_STATE     State;\r
  UINT32     RCA;\r
\r
  Host  = MmcHostInstance->MmcHost;\r
  Media = MmcHostInstance->BlockIo.Media;\r
\r
  // Fetch card identity register\r
  Status = Host->SendCommand (Host, MMC_CMD2, 0);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): Failed to send CMD2, Status=%r.\n", Status));\r
    return Status;\r
  }\r
\r
  Status = Host->ReceiveResponse (Host, MMC_RESPONSE_TYPE_R2, (UINT32 *)&(MmcHostInstance->CardInfo.CIDData));\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): CID retrieval error, Status=%r.\n", Status));\r
    return Status;\r
  }\r
\r
  // Assign a relative address value to the card\r
  MmcHostInstance->CardInfo.RCA = ++mEmmcRcaCount; // TODO: might need a more sophisticated way of doing this\r
  RCA = MmcHostInstance->CardInfo.RCA << RCA_SHIFT_OFFSET;\r
  Status = Host->SendCommand (Host, MMC_CMD3, RCA);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): RCA set error, Status=%r.\n", Status));\r
    return Status;\r
  }\r
\r
  // Fetch card specific data\r
  Status = Host->SendCommand (Host, MMC_CMD9, RCA);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): Failed to send CMD9, Status=%r.\n", Status));\r
    return Status;\r
  }\r
\r
  Status = Host->ReceiveResponse (Host, MMC_RESPONSE_TYPE_R2, (UINT32 *)&(MmcHostInstance->CardInfo.CSDData));\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): CSD retrieval error, Status=%r.\n", Status));\r
    return Status;\r
  }\r
\r
  // Select the card\r
  Status = Host->SendCommand (Host, MMC_CMD7, RCA);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): Card selection error, Status=%r.\n", Status));\r
  }\r
\r
  if (MMC_HOST_HAS_SETIOS(Host)) {\r
    // Set 1-bit bus width\r
    Status = Host->SetIos (Host, 0, 1, EMMCBACKWARD);\r
    if (EFI_ERROR (Status)) {\r
      DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): Set 1-bit bus width error, Status=%r.\n", Status));\r
      return Status;\r
    }\r
\r
    // Set 1-bit bus width for EXTCSD\r
    Status = EmmcSetEXTCSD (MmcHostInstance, EXTCSD_BUS_WIDTH, EMMC_BUS_WIDTH_1BIT);\r
    if (EFI_ERROR (Status)) {\r
      DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): Set extcsd bus width error, Status=%r.\n", Status));\r
      return Status;\r
    }\r
  }\r
\r
  // Fetch ECSD\r
  Status = Host->SendCommand (Host, MMC_CMD8, RCA);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): ECSD fetch error, Status=%r.\n", Status));\r
  }\r
\r
  Status = Host->ReadBlockData (Host, 0, 512, (UINT32 *)&(MmcHostInstance->CardInfo.ECSDData));\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): ECSD read error, Status=%r.\n", Status));\r
    return Status;\r
  }\r
\r
  // Make sure device exiting data mode\r
  do {\r
    Status = EmmcGetDeviceState (MmcHostInstance, &State);\r
    if (EFI_ERROR (Status)) {\r
      DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): Failed to get device state, Status=%r.\n", Status));\r
      return Status;\r
    }\r
  } while (State == EMMC_DATA_STATE);\r
\r
  // Set up media\r
  Media->BlockSize = EMMC_CARD_SIZE; // 512-byte support is mandatory for eMMC cards\r
  Media->MediaId = MmcHostInstance->CardInfo.CIDData.PSN;\r
  Media->ReadOnly = MmcHostInstance->CardInfo.CSDData.PERM_WRITE_PROTECT;\r
  Media->LogicalBlocksPerPhysicalBlock = 1;\r
  Media->IoAlign = 4;\r
  // Compute last block using bits [215:212] of the ECSD\r
  Media->LastBlock = MmcHostInstance->CardInfo.ECSDData.SECTOR_COUNT - 1; // eMMC isn't supposed to report this for\r
  // Cards <2GB in size, but the model does.\r
\r
  // Setup card type\r
  MmcHostInstance->CardInfo.CardType = EMMC_CARD;\r
  return EFI_SUCCESS;\r
}\r
\r
STATIC\r
EFI_STATUS\r
InitializeEmmcDevice (\r
  IN  MMC_HOST_INSTANCE   *MmcHostInstance\r
  )\r
{\r
  EFI_MMC_HOST_PROTOCOL *Host;\r
  EFI_STATUS Status = EFI_SUCCESS;\r
  ECSD       *ECSDData;\r
  UINT32     BusClockFreq, Idx;\r
  UINT32     TimingMode[4] = {EMMCHS52DDR1V2, EMMCHS52DDR1V8, EMMCHS52, EMMCHS26};\r
\r
  Host  = MmcHostInstance->MmcHost;\r
  ECSDData = &MmcHostInstance->CardInfo.ECSDData;\r
  if (ECSDData->DEVICE_TYPE == EMMCBACKWARD)\r
    return EFI_SUCCESS;\r
\r
  if (!MMC_HOST_HAS_SETIOS(Host)) {\r
    return EFI_SUCCESS;\r
  }\r
  Status = EmmcSetEXTCSD (MmcHostInstance, EXTCSD_HS_TIMING, EMMC_TIMING_HS);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((DEBUG_ERROR, "InitializeEmmcDevice(): Failed to switch high speed mode, Status:%r.\n", Status));\r
    return Status;\r
  }\r
\r
  for (Idx = 0; Idx < 4; Idx++) {\r
    switch (TimingMode[Idx]) {\r
    case EMMCHS52DDR1V2:\r
    case EMMCHS52DDR1V8:\r
    case EMMCHS52:\r
      BusClockFreq = 52000000;\r
      break;\r
    case EMMCHS26:\r
      BusClockFreq = 26000000;\r
      break;\r
    default:\r
      return EFI_UNSUPPORTED;\r
    }\r
    Status = Host->SetIos (Host, BusClockFreq, 8, TimingMode[Idx]);\r
    if (!EFI_ERROR (Status)) {\r
      Status = EmmcSetEXTCSD (MmcHostInstance, EXTCSD_BUS_WIDTH, EMMC_BUS_WIDTH_DDR_8BIT);\r
      if (EFI_ERROR (Status)) {\r
        DEBUG ((DEBUG_ERROR, "InitializeEmmcDevice(): Failed to set EXTCSD bus width, Status:%r\n", Status));\r
      }\r
      return Status;\r
    }\r
  }\r
  return Status;\r
}\r
\r
STATIC\r
EFI_STATUS\r
InitializeSdMmcDevice (\r
  IN  MMC_HOST_INSTANCE   *MmcHostInstance\r
  )\r
{\r
  UINT32        CmdArg;\r
  UINT32        Response[4];\r
  UINT32        Buffer[128];\r
  UINTN         BlockSize;\r
  UINTN         CardSize;\r
  UINTN         NumBlocks;\r
  BOOLEAN       CccSwitch;\r
  SCR           Scr;\r
  EFI_STATUS    Status;\r
  EFI_MMC_HOST_PROTOCOL     *MmcHost;\r
\r
  MmcHost = MmcHostInstance->MmcHost;\r
\r
  // Send a command to get Card specific data\r
  CmdArg = MmcHostInstance->CardInfo.RCA << 16;\r
  Status = MmcHost->SendCommand (MmcHost, MMC_CMD9, CmdArg);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG((EFI_D_ERROR, "InitializeSdMmcDevice(MMC_CMD9): Error, Status=%r\n", Status));\r
    return Status;\r
  }\r
\r
  // Read Response\r
  Status = MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_CSD, Response);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG((EFI_D_ERROR, "InitializeSdMmcDevice(): Failed to receive CSD, Status=%r\n", Status));\r
    return Status;\r
  }\r
  PrintCSD (Response);\r
  if (MMC_CSD_GET_CCC(Response) & SD_CCC_SWITCH) {\r
    CccSwitch = TRUE;\r
  } else {\r
    CccSwitch = FALSE;\r
  }\r
\r
  if (MmcHostInstance->CardInfo.CardType == SD_CARD_2_HIGH) {\r
    CardSize = HC_MMC_CSD_GET_DEVICESIZE (Response);\r
    NumBlocks = ((CardSize + 1) * 1024);\r
    BlockSize = 1 << MMC_CSD_GET_READBLLEN (Response);\r
  } else {\r
    CardSize = MMC_CSD_GET_DEVICESIZE (Response);\r
    NumBlocks = (CardSize + 1) * (1 << (MMC_CSD_GET_DEVICESIZEMULT (Response) + 2));\r
    BlockSize = 1 << MMC_CSD_GET_READBLLEN (Response);\r
  }\r
\r
  // For >=2G card, BlockSize may be 1K, but the transfer size is 512 bytes.\r
  if (BlockSize > 512) {\r
    NumBlocks = MultU64x32 (NumBlocks, BlockSize / 512);\r
    BlockSize = 512;\r
  }\r
\r
  MmcHostInstance->BlockIo.Media->LastBlock    = (NumBlocks - 1);\r
  MmcHostInstance->BlockIo.Media->BlockSize    = BlockSize;\r
  MmcHostInstance->BlockIo.Media->ReadOnly     = MmcHost->IsReadOnly (MmcHost);\r
  MmcHostInstance->BlockIo.Media->MediaPresent = TRUE;\r
  MmcHostInstance->BlockIo.Media->MediaId++;\r
\r
  CmdArg = MmcHostInstance->CardInfo.RCA << 16;\r
  Status = MmcHost->SendCommand (MmcHost, MMC_CMD7, CmdArg);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG((EFI_D_ERROR, "InitializeSdMmcDevice(MMC_CMD7): Error and Status = %r\n", Status));\r
    return Status;\r
  }\r
\r
  Status = MmcHost->SendCommand (MmcHost, MMC_CMD55, CmdArg);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "%a(MMC_CMD55): Error and Status = %r\n", Status));\r
    return Status;\r
  }\r
  Status = MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_R1, Response);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "%a(MMC_CMD55): Error and Status = %r\n", Status));\r
    return Status;\r
  }\r
  if ((Response[0] & MMC_STATUS_APP_CMD) == 0) {\r
    return EFI_SUCCESS;\r
  }\r
\r
  /* SCR */\r
  Status = MmcHost->SendCommand (MmcHost, MMC_ACMD51, 0);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "%a(MMC_ACMD51): Error and Status = %r\n", __func__, Status));\r
    return Status;\r
  } else {\r
    Status = MmcHost->ReadBlockData (MmcHost, 0, 8, Buffer);\r
    if (EFI_ERROR (Status)) {\r
      DEBUG ((EFI_D_ERROR, "%a(MMC_ACMD51): ReadBlockData Error and Status = %r\n", __func__, Status));\r
      return Status;\r
    }\r
    CopyMem (&Scr, Buffer, 8);\r
    if (Scr.SD_SPEC == 2) {\r
      if (Scr.SD_SPEC3 == 1) {\r
	if (Scr.SD_SPEC4 == 1) {\r
          DEBUG ((EFI_D_INFO, "Found SD Card for Spec Version 4.xx\n"));\r
	} else {\r
          DEBUG ((EFI_D_INFO, "Found SD Card for Spec Version 3.0x\n"));\r
	}\r
      } else {\r
	if (Scr.SD_SPEC4 == 0) {\r
          DEBUG ((EFI_D_INFO, "Found SD Card for Spec Version 2.0\n"));\r
	} else {\r
	  DEBUG ((EFI_D_ERROR, "Found invalid SD Card\n"));\r
	}\r
      }\r
    } else {\r
      if ((Scr.SD_SPEC3 == 0) && (Scr.SD_SPEC4 == 0)) {\r
        if (Scr.SD_SPEC == 1) {\r
	  DEBUG ((EFI_D_INFO, "Found SD Card for Spec Version 1.10\n"));\r
	} else {\r
	  DEBUG ((EFI_D_INFO, "Found SD Card for Spec Version 1.0\n"));\r
	}\r
      } else {\r
        DEBUG ((EFI_D_ERROR, "Found invalid SD Card\n"));\r
      }\r
    }\r
  }\r
  if (CccSwitch) {\r
    /* SD Switch, Mode:1, Group:0, Value:1 */\r
    CmdArg = 1 << 31 | 0x00FFFFFF;\r
    CmdArg &= ~(0xF << (0 * 4));\r
    CmdArg |= 1 << (0 * 4);\r
    Status = MmcHost->SendCommand (MmcHost, MMC_CMD6, CmdArg);\r
    if (EFI_ERROR (Status)) {\r
      DEBUG ((EFI_D_ERROR, "%a(MMC_CMD6): Error and Status = %r\n", Status));\r
       return Status;\r
    } else {\r
      Status = MmcHost->ReadBlockData (MmcHost, 0, 64, Buffer);\r
      if (EFI_ERROR (Status)) {\r
        DEBUG ((EFI_D_ERROR, "%a(MMC_CMD6): ReadBlockData Error and Status = %r\n", Status));\r
        return Status;\r
      }\r
    }\r
  }\r
  if (Scr.SD_BUS_WIDTHS & SD_BUS_WIDTH_4BIT) {\r
    CmdArg = MmcHostInstance->CardInfo.RCA << 16;\r
    Status = MmcHost->SendCommand (MmcHost, MMC_CMD55, CmdArg);\r
    if (EFI_ERROR (Status)) {\r
      DEBUG ((EFI_D_ERROR, "%a(MMC_CMD55): Error and Status = %r\n", Status));\r
      return Status;\r
    }\r
    /* Width: 4 */\r
    Status = MmcHost->SendCommand (MmcHost, MMC_CMD6, 2);\r
    if (EFI_ERROR (Status)) {\r
      DEBUG ((EFI_D_ERROR, "%a(MMC_CMD6): Error and Status = %r\n", Status));\r
      return Status;\r
    }\r
  }\r
  if (MMC_HOST_HAS_SETIOS(MmcHost)) {\r
    Status = MmcHost->SetIos (MmcHost, 26 * 1000 * 1000, 4, EMMCBACKWARD);\r
    if (EFI_ERROR (Status)) {\r
      DEBUG ((EFI_D_ERROR, "%a(SetIos): Error and Status = %r\n", Status));\r
      return Status;\r
    }\r
  }\r
  return EFI_SUCCESS;\r
}\r
\r
STATIC\r
EFI_STATUS\r
EFIAPI\r
MmcIdentificationMode (\r
  IN MMC_HOST_INSTANCE     *MmcHostInstance\r
  )\r
{\r
  EFI_STATUS              Status;\r
  UINT32                  Response[4];\r
  UINTN                   Timeout;\r
  UINTN                   CmdArg;\r
  BOOLEAN                 IsHCS;\r
  EFI_MMC_HOST_PROTOCOL   *MmcHost;\r
  OCR_RESPONSE            OcrResponse;\r
\r
  MmcHost = MmcHostInstance->MmcHost;\r
  CmdArg = 0;\r
  IsHCS = FALSE;\r
\r
  if (MmcHost == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  // We can get into this function if we restart the identification mode\r
  if (MmcHostInstance->State == MmcHwInitializationState) {\r
    // Initialize the MMC Host HW\r
    Status = MmcNotifyState (MmcHostInstance, MmcHwInitializationState);\r
    if (EFI_ERROR (Status)) {\r
      DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcHwInitializationState, Status=%r.\n", Status));\r
      return Status;\r
    }\r
  }\r
\r
  Status = MmcHost->SendCommand (MmcHost, MMC_CMD0, 0);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD0): Error, Status=%r.\n", Status));\r
    return Status;\r
  }\r
  Status = MmcNotifyState (MmcHostInstance, MmcIdleState);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcIdleState, Status=%r.\n", Status));\r
    return Status;\r
  }\r
\r
  // Send CMD1 to get OCR (MMC)\r
  // This command only valid for MMC and eMMC\r
  Timeout = MAX_RETRY_COUNT;\r
  do {\r
    Status = MmcHost->SendCommand (MmcHost, MMC_CMD1, EMMC_CMD1_CAPACITY_GREATER_THAN_2GB);\r
    if (EFI_ERROR (Status))\r
      break;\r
    Status = MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_OCR, (UINT32 *)&OcrResponse);\r
    if (EFI_ERROR (Status)) {\r
      DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Failed to receive OCR, Status=%r.\n", Status));\r
      return Status;\r
    }\r
    Timeout--;\r
  } while (!OcrResponse.Ocr.PowerUp && (Timeout > 0));\r
  if (Status == EFI_SUCCESS) {\r
    if (!OcrResponse.Ocr.PowerUp) {\r
      DEBUG ((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD1): Card initialisation failure, Status=%r.\n", Status));\r
      return EFI_DEVICE_ERROR;\r
    }\r
    OcrResponse.Ocr.PowerUp = 0;\r
    if (OcrResponse.Raw == EMMC_CMD1_CAPACITY_GREATER_THAN_2GB) {\r
      MmcHostInstance->CardInfo.OCRData.AccessMode = BIT1;\r
    }\r
    else {\r
      MmcHostInstance->CardInfo.OCRData.AccessMode = 0x0;\r
    }\r
    // Check whether MMC or eMMC\r
    if (OcrResponse.Raw == EMMC_CMD1_CAPACITY_GREATER_THAN_2GB ||\r
        OcrResponse.Raw == EMMC_CMD1_CAPACITY_LESS_THAN_2GB) {\r
      return EmmcIdentificationMode (MmcHostInstance, OcrResponse);\r
    }\r
  }\r
\r
  // Are we using SDIO ?\r
  Status = MmcHost->SendCommand (MmcHost, MMC_CMD5, 0);\r
  if (Status == EFI_SUCCESS) {\r
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD5): Error - SDIO not supported, Status=%r.\n", Status));\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  // Check which kind of card we are using. Ver2.00 or later SD Memory Card (PL180 is SD v1.1)\r
  CmdArg = (0x0UL << 12 | BIT8 | 0xCEUL << 0);\r
  Status = MmcHost->SendCommand (MmcHost, MMC_CMD8, CmdArg);\r
  if (Status == EFI_SUCCESS) {\r
    DEBUG ((EFI_D_ERROR, "Card is SD2.0 => Supports high capacity\n"));\r
    IsHCS = TRUE;\r
    Status = MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_R7, Response);\r
    if (EFI_ERROR (Status)) {\r
      DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Failed to receive response to CMD8, Status=%r.\n", Status));\r
      return Status;\r
    }\r
    PrintResponseR1 (Response[0]);\r
    // Check if it is valid response\r
    if (Response[0] != CmdArg) {\r
      DEBUG ((EFI_D_ERROR, "The Card is not usable\n"));\r
      return EFI_UNSUPPORTED;\r
    }\r
  } else {\r
    DEBUG ((EFI_D_ERROR, "Not a SD2.0 Card\n"));\r
  }\r
\r
  // We need to wait for the MMC or SD card is ready => (gCardInfo.OCRData.PowerUp == 1)\r
  Timeout = MAX_RETRY_COUNT;\r
  while (Timeout > 0) {\r
    // SD Card or MMC Card ? CMD55 indicates to the card that the next command is an application specific command\r
    Status = MmcHost->SendCommand (MmcHost, MMC_CMD55, 0);\r
    if (Status == EFI_SUCCESS) {\r
      DEBUG ((EFI_D_INFO, "Card should be SD\n"));\r
      if (IsHCS) {\r
        MmcHostInstance->CardInfo.CardType = SD_CARD_2;\r
      } else {\r
        MmcHostInstance->CardInfo.CardType = SD_CARD;\r
      }\r
\r
      // Note: The first time CmdArg will be zero\r
      CmdArg = ((UINTN *) &(MmcHostInstance->CardInfo.OCRData))[0];\r
      if (IsHCS) {\r
        CmdArg |= BIT30;\r
      }\r
      Status = MmcHost->SendCommand (MmcHost, MMC_ACMD41, CmdArg);\r
      if (!EFI_ERROR (Status)) {\r
        Status = MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_OCR, Response);\r
        if (EFI_ERROR (Status)) {\r
          DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Failed to receive OCR, Status=%r.\n", Status));\r
          return Status;\r
        }\r
        ((UINT32 *) &(MmcHostInstance->CardInfo.OCRData))[0] = Response[0];\r
      }\r
    } else {\r
      DEBUG ((EFI_D_INFO, "Card should be MMC\n"));\r
      MmcHostInstance->CardInfo.CardType = MMC_CARD;\r
\r
      Status = MmcHost->SendCommand (MmcHost, MMC_CMD1, 0x800000);\r
      if (!EFI_ERROR (Status)) {\r
        Status = MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_OCR, Response);\r
        if (EFI_ERROR (Status)) {\r
          DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Failed to receive OCR, Status=%r.\n", Status));\r
          return Status;\r
        }\r
        ((UINT32 *) &(MmcHostInstance->CardInfo.OCRData))[0] = Response[0];\r
      }\r
    }\r
\r
    if (!EFI_ERROR (Status)) {\r
      if (!MmcHostInstance->CardInfo.OCRData.PowerUp) {\r
        gBS->Stall (1);\r
        Timeout--;\r
      } else {\r
        if ((MmcHostInstance->CardInfo.CardType == SD_CARD_2) && (MmcHostInstance->CardInfo.OCRData.AccessMode & BIT1)) {\r
          MmcHostInstance->CardInfo.CardType = SD_CARD_2_HIGH;\r
          DEBUG ((EFI_D_ERROR, "High capacity card.\n"));\r
        }\r
        break;  // The MMC/SD card is ready. Continue the Identification Mode\r
      }\r
    } else {\r
      gBS->Stall (1);\r
      Timeout--;\r
    }\r
  }\r
\r
  if (Timeout == 0) {\r
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode(): No Card\n"));\r
    return EFI_NO_MEDIA;\r
  } else {\r
    PrintOCR (Response[0]);\r
  }\r
\r
  Status = MmcNotifyState (MmcHostInstance, MmcReadyState);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcReadyState\n"));\r
    return Status;\r
  }\r
\r
  Status = MmcHost->SendCommand (MmcHost, MMC_CMD2, 0);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD2): Error\n"));\r
    return Status;\r
  }\r
  Status = MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_CID, Response);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Failed to receive CID, Status=%r.\n", Status));\r
    return Status;\r
  }\r
\r
  PrintCID (Response);\r
\r
  Status = MmcHost->NotifyState (MmcHost, MmcIdentificationState);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcIdentificationState\n"));\r
    return Status;\r
  }\r
\r
  //\r
  // Note, SD specifications say that "if the command execution causes a state change, it\r
  // will be visible to the host in the response to the next command"\r
  // The status returned for this CMD3 will be 2 - identification\r
  //\r
  CmdArg = 1;\r
  Status = MmcHost->SendCommand (MmcHost, MMC_CMD3, CmdArg);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD3): Error\n"));\r
    return Status;\r
  }\r
\r
  Status = MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_RCA, Response);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Failed to receive RCA, Status=%r.\n", Status));\r
    return Status;\r
  }\r
  PrintRCA (Response[0]);\r
\r
  // For MMC card, RCA is assigned by CMD3 while CMD3 dumps the RCA for SD card\r
  if (MmcHostInstance->CardInfo.CardType != MMC_CARD) {\r
    MmcHostInstance->CardInfo.RCA = Response[0] >> 16;\r
  } else {\r
    MmcHostInstance->CardInfo.RCA = CmdArg;\r
  }\r
  Status = MmcNotifyState (MmcHostInstance, MmcStandByState);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcStandByState\n"));\r
    return Status;\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
InitializeMmcDevice (\r
  IN  MMC_HOST_INSTANCE   *MmcHostInstance\r
  )\r
{\r
  EFI_STATUS              Status;\r
  EFI_MMC_HOST_PROTOCOL   *MmcHost;\r
  UINTN                   BlockCount;\r
\r
  BlockCount = 1;\r
  MmcHost = MmcHostInstance->MmcHost;\r
\r
  Status = MmcIdentificationMode (MmcHostInstance);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG((EFI_D_ERROR, "InitializeMmcDevice(): Error in Identification Mode, Status=%r\n", Status));\r
    return Status;\r
  }\r
\r
  Status = MmcNotifyState (MmcHostInstance, MmcTransferState);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG((EFI_D_ERROR, "InitializeMmcDevice(): Error MmcTransferState, Status=%r\n", Status));\r
    return Status;\r
  }\r
\r
  if (MmcHostInstance->CardInfo.CardType != EMMC_CARD) {\r
    Status = InitializeSdMmcDevice (MmcHostInstance);\r
  } else {\r
    Status = InitializeEmmcDevice (MmcHostInstance);\r
  }\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  // Set Block Length\r
  Status = MmcHost->SendCommand (MmcHost, MMC_CMD16, MmcHostInstance->BlockIo.Media->BlockSize);\r
  if (EFI_ERROR (Status)) {\r
    DEBUG((EFI_D_ERROR, "InitializeMmcDevice(MMC_CMD16): Error MmcHostInstance->BlockIo.Media->BlockSize: %d and Error = %r\n",\r
                        MmcHostInstance->BlockIo.Media->BlockSize, Status));\r
    return Status;\r
  }\r
\r
  // Block Count (not used). Could return an error for SD card\r
  if (MmcHostInstance->CardInfo.CardType == MMC_CARD) {\r
    Status = MmcHost->SendCommand (MmcHost, MMC_CMD23, BlockCount);\r
    if (EFI_ERROR (Status)) {\r
      DEBUG((EFI_D_ERROR, "InitializeMmcDevice(MMC_CMD23): Error, Status=%r\n", Status));\r
      return Status;\r
    }\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r