示例#1
0
EFI_STATUS
MmcIoBlocks (
  IN EFI_BLOCK_IO_PROTOCOL    *This,
  IN UINTN                    Transfer,
  IN UINT32                   MediaId,
  IN EFI_LBA                  Lba,
  IN UINTN                    BufferSize,
  OUT VOID                    *Buffer
  )
{
  UINT32                  Response[4];
  EFI_STATUS              Status;
  UINTN                   CmdArg;
  INTN                    Timeout;
  UINTN                   Cmd;
  MMC_HOST_INSTANCE       *MmcHostInstance;
  EFI_MMC_HOST_PROTOCOL   *MmcHost;
  UINTN                   BytesRemainingToBeTransfered;
  UINTN                   BlockCount;

  BlockCount = 1;
  MmcHostInstance = MMC_HOST_INSTANCE_FROM_BLOCK_IO_THIS (This);
  ASSERT (MmcHostInstance != NULL);
  MmcHost = MmcHostInstance->MmcHost;
  ASSERT (MmcHost);

  if (This->Media->MediaId != MediaId) {
    return EFI_MEDIA_CHANGED;
  }

  if ((MmcHost == NULL) || (Buffer == NULL)) {
    return EFI_INVALID_PARAMETER;
  }

  // Check if a Card is Present
  if (!MmcHostInstance->BlockIo.Media->MediaPresent) {
    return EFI_NO_MEDIA;
  }

  // All blocks must be within the device
  if ((Lba + (BufferSize / This->Media->BlockSize)) > (This->Media->LastBlock + 1)) {
    return EFI_INVALID_PARAMETER;
  }

  if ((Transfer == MMC_IOBLOCKS_WRITE) && (This->Media->ReadOnly == TRUE)) {
    return EFI_WRITE_PROTECTED;
  }

  // Reading 0 Byte is valid
  if (BufferSize == 0) {
    return EFI_SUCCESS;
  }

  // The buffer size must be an exact multiple of the block size
  if ((BufferSize % This->Media->BlockSize) != 0) {
    return EFI_BAD_BUFFER_SIZE;
  }

  // Check the alignment
  if ((This->Media->IoAlign > 2) && (((UINTN)Buffer & (This->Media->IoAlign - 1)) != 0)) {
    return EFI_INVALID_PARAMETER;
  }

  BytesRemainingToBeTransfered = BufferSize;
  while (BytesRemainingToBeTransfered > 0) {

    // Check if the Card is in Ready status
    CmdArg = MmcHostInstance->CardInfo.RCA << 16;
    Response[0] = 0;
    Timeout = 20;
    while(   (!(Response[0] & MMC_R0_READY_FOR_DATA))
          && (MMC_R0_CURRENTSTATE (Response) != MMC_R0_STATE_TRAN)
          && Timeout--) {
      Status = MmcHost->SendCommand (MmcHost, MMC_CMD13, CmdArg);
      if (!EFI_ERROR (Status)) {
        MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_R1, Response);
      }
    }

    if (0 == Timeout) {
      DEBUG ((EFI_D_ERROR, "The Card is busy\n"));
      return EFI_NOT_READY;
    }

    //Set command argument based on the card access mode (Byte mode or Block mode)
    if (MmcHostInstance->CardInfo.OCRData.AccessMode & BIT1) {
      CmdArg = Lba;
    } else {
      CmdArg = Lba * This->Media->BlockSize;
    }

    if (Transfer == MMC_IOBLOCKS_READ) {
      // Read a single block
      Cmd = MMC_CMD17;
    } else {
      // Write a single block
      Cmd = MMC_CMD24;
    }
    Status = MmcHost->SendCommand (MmcHost, Cmd, CmdArg);
    if (EFI_ERROR (Status)) {
      DEBUG ((EFI_D_ERROR, "MmcIoBlocks(MMC_CMD%d): Error %r\n", Cmd, Status));
      return Status;
    }

    if (Transfer == MMC_IOBLOCKS_READ) {
      // Read one block of Data
      Status = MmcHost->ReadBlockData (MmcHost, Lba, This->Media->BlockSize, Buffer);
      if (EFI_ERROR (Status)) {
        DEBUG ((EFI_D_BLKIO, "MmcIoBlocks(): Error Read Block Data and Status = %r\n", Status));
        MmcStopTransmission (MmcHost);
        return Status;
      }
      Status = MmcNotifyState (MmcHostInstance, MmcProgrammingState);
      if (EFI_ERROR (Status)) {
        DEBUG ((EFI_D_ERROR, "MmcIoBlocks() : Error MmcProgrammingState\n"));
        return Status;
      }
    } else {
      // Write one block of Data
      Status = MmcHost->WriteBlockData (MmcHost, Lba, This->Media->BlockSize, Buffer);
      if (EFI_ERROR (Status)) {
        DEBUG ((EFI_D_BLKIO, "MmcIoBlocks(): Error Write Block Data and Status = %r\n", Status));
        MmcStopTransmission (MmcHost);
        return Status;
      }
    }

    // Command 13 - Read status and wait for programming to complete (return to tran)
    Timeout = MMCI0_TIMEOUT;
    CmdArg = MmcHostInstance->CardInfo.RCA << 16;
    Response[0] = 0;
    while(   (!(Response[0] & MMC_R0_READY_FOR_DATA))
          && (MMC_R0_CURRENTSTATE (Response) != MMC_R0_STATE_TRAN)
          && Timeout--) {
      Status = MmcHost->SendCommand (MmcHost, MMC_CMD13, CmdArg);
      if (!EFI_ERROR (Status)) {
        MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_R1, Response);
        if ((Response[0] & MMC_R0_READY_FOR_DATA)) {
          break;  // Prevents delay once finished
        }
      }
      gBS->Stall (1);
    }

    Status = MmcNotifyState (MmcHostInstance, MmcTransferState);
    if (EFI_ERROR (Status)) {
      DEBUG ((EFI_D_ERROR, "MmcIoBlocks() : Error MmcTransferState\n"));
      return Status;
    }

    BytesRemainingToBeTransfered -= This->Media->BlockSize;
    Lba    += BlockCount;
    Buffer = (UINT8 *)Buffer + This->Media->BlockSize;
  }

  return EFI_SUCCESS;
}
示例#2
0
文件: MmcBlockIo.c 项目: lersek/edk2
STATIC
EFI_STATUS
MmcTransferBlock (
  IN EFI_BLOCK_IO_PROTOCOL    *This,
  IN UINTN                    Cmd,
  IN UINTN                    Transfer,
  IN UINT32                   MediaId,
  IN EFI_LBA                  Lba,
  IN UINTN                    BufferSize,
  OUT VOID                    *Buffer
  )
{
  EFI_STATUS              Status;
  UINTN                   CmdArg;
  INTN                    Timeout;
  UINT32                  Response[4];
  MMC_HOST_INSTANCE       *MmcHostInstance;
  EFI_MMC_HOST_PROTOCOL   *MmcHost;

  MmcHostInstance = MMC_HOST_INSTANCE_FROM_BLOCK_IO_THIS (This);
  MmcHost = MmcHostInstance->MmcHost;

  if (MmcHostInstance->CardInfo.CardType != EMMC_CARD) {
    //Set command argument based on the card capacity
    //if 0 : SDSC card
    //if 1 : SDXC/SDHC
    if (MmcHostInstance->CardInfo.OCRData.AccessMode & SD_CARD_CAPACITY) {
      CmdArg = Lba;
    } else {
      CmdArg = Lba * This->Media->BlockSize;
    }
  } else {
    //Set command argument based on the card access mode (Byte mode or Block mode)
    if ((MmcHostInstance->CardInfo.OCRData.AccessMode & MMC_OCR_ACCESS_MASK) ==
        MMC_OCR_ACCESS_SECTOR) {
      CmdArg = Lba;
    } else {
      CmdArg = Lba * This->Media->BlockSize;
    }
  }

  Status = MmcHost->SendCommand (MmcHost, Cmd, CmdArg);
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "%a(MMC_CMD%d): Error %r\n", __func__, Cmd, Status));
    return Status;
  }

  if (Transfer == MMC_IOBLOCKS_READ) {
    // Read Data
    Status = MmcHost->ReadBlockData (MmcHost, Lba, BufferSize, Buffer);
    if (EFI_ERROR (Status)) {
      DEBUG ((EFI_D_BLKIO, "%a(): Error Read Block Data and Status = %r\n", __func__, Status));
      MmcStopTransmission (MmcHost);
      return Status;
    }
    Status = MmcNotifyState (MmcHostInstance, MmcProgrammingState);
    if (EFI_ERROR (Status)) {
      DEBUG ((EFI_D_ERROR, "%a() : Error MmcProgrammingState\n", __func__));
      return Status;
    }
  } else {
    // Write Data
    Status = MmcHost->WriteBlockData (MmcHost, Lba, BufferSize, Buffer);
    if (EFI_ERROR (Status)) {
      DEBUG ((EFI_D_BLKIO, "%a(): Error Write Block Data and Status = %r\n", __func__, Status));
      MmcStopTransmission (MmcHost);
      return Status;
    }
  }

  // Command 13 - Read status and wait for programming to complete (return to tran)
  Timeout = MMCI0_TIMEOUT;
  CmdArg = MmcHostInstance->CardInfo.RCA << 16;
  Response[0] = 0;
  while(!(Response[0] & MMC_R0_READY_FOR_DATA)
        && (MMC_R0_CURRENTSTATE (Response) != MMC_R0_STATE_TRAN)
        && Timeout--) {
    Status = MmcHost->SendCommand (MmcHost, MMC_CMD13, CmdArg);
    if (!EFI_ERROR (Status)) {
      MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_R1, Response);
      if (Response[0] & MMC_R0_READY_FOR_DATA) {
        break;  // Prevents delay once finished
      }
    }
  }

  if (BufferSize > This->Media->BlockSize) {
    Status = MmcHost->SendCommand (MmcHost, MMC_CMD12, 0);
    if (EFI_ERROR (Status)) {
      DEBUG ((EFI_D_BLKIO, "%a(): Error and Status:%r\n", __func__, Status));
    }
    MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_R1b, Response);
  }

  Status = MmcNotifyState (MmcHostInstance, MmcTransferState);
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "MmcIoBlocks() : Error MmcTransferState\n"));
    return Status;
  }
  return Status;
}