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;
}
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;
}
