diff options
Diffstat (limited to 'ArmPkg/Universal/MmcDxe/MmcBlockIo.c')
| -rw-r--r-- | ArmPkg/Universal/MmcDxe/MmcBlockIo.c | 558 |
1 files changed, 558 insertions, 0 deletions
diff --git a/ArmPkg/Universal/MmcDxe/MmcBlockIo.c b/ArmPkg/Universal/MmcDxe/MmcBlockIo.c new file mode 100644 index 0000000..d8bd2d1 --- /dev/null +++ b/ArmPkg/Universal/MmcDxe/MmcBlockIo.c @@ -0,0 +1,558 @@ +/** @file
+*
+* Copyright (c) 2011, ARM Limited. All rights reserved.
+*
+* 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 <Protocol/MmcHost.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/TimerLib.h>
+
+#include "Mmc.h"
+
+// Untested ...
+//#define USE_STREAM
+
+#define MAX_RETRY_COUNT 200
+
+EFI_STATUS
+MmcNotifyState (
+ MMC_HOST_INSTANCE *MmcHostInstance,
+ MMC_STATE State
+ ) {
+ MmcHostInstance->State = State;
+ return MmcHostInstance->MmcHost->NotifyState(State);
+}
+
+VOID PrintOCR(UINT32 ocr) {
+ float minv, maxv, volts;
+ int loop;
+
+ minv = 3.6;
+ maxv = 2.0;
+ volts = 2.0;
+
+ // The MMC register bits [23:8] indicate the working range of the card
+ for (loop = 8; loop < 24; loop++) {
+ if (ocr & (1 << loop)) {
+ if (minv > volts) minv = volts;
+ if (maxv < volts) maxv = volts + 0.1;
+ }
+ volts = volts + 0.1;
+ }
+
+ DEBUG((EFI_D_ERROR, "- PrintOCR ocr (0x%X)\n",ocr));
+ //DEBUG((EFI_D_ERROR, "\t- Card operating voltage: %fV to %fV\n", minv, maxv));
+ if (((ocr >> 29) & 3) == 0)
+ DEBUG((EFI_D_ERROR, "\t- AccessMode: Byte Mode\n"));
+ else
+ DEBUG((EFI_D_ERROR, "\t- AccessMode: Block Mode (0x%X)\n",((ocr >> 29) & 3)));
+
+ if (ocr & MMC_OCR_POWERUP)
+ DEBUG((EFI_D_ERROR, "\t- PowerUp\n"));
+ else
+ DEBUG((EFI_D_ERROR, "\t- Voltage Not Supported\n"));
+}
+
+VOID PrintCID(UINT32* cid) {
+ DEBUG((EFI_D_ERROR, "- PrintCID\n"));
+ DEBUG((EFI_D_ERROR, "\t- Manufacturing date: %d/%d\n",(cid[0] >> 8) & 0xF,(cid[0] >> 12) & 0xFF));
+ DEBUG((EFI_D_ERROR, "\t- Product serial number: 0x%X%X\n",cid[1] & 0xFFFFFF,(cid[0] >> 24) & 0xFF));
+ DEBUG((EFI_D_ERROR, "\t- Product revision: %d\n",cid[1] >> 24));
+ //DEBUG((EFI_D_ERROR, "\t- Product name: %s\n",(char*)(cid + 2)));
+ DEBUG((EFI_D_ERROR, "\t- OEM ID: %c%c\n",(cid[3] >> 8) & 0xFF,(cid[3] >> 16) & 0xFF));
+}
+
+VOID PrintCSD(UINT32* csd) {
+ UINTN val32;
+ CONST CHAR8* str_unit[] = { "100kbit/s","1Mbit/s","10Mbit/s","100MBit/s","Unkbown","Unkbown","Unkbown","Unkbown" };
+ CONST CHAR8* str_value[] = { "1.0","1.2","1.3","1.5","2.0","2.5","3.0","3.5","4.0","4.5","5.0","Unknown","Unknown","Unknown","Unknown" };
+
+ if (((csd[2] >> 30) & 0x3) == 0)
+ DEBUG((EFI_D_ERROR, "- PrintCSD Version 1.01-1.10/Version 2.00/Standard Capacity\n"));
+ else if (((csd[2] >> 30) & 0x3) == 1)
+ DEBUG((EFI_D_ERROR, "- PrintCSD Version 2.00/High Capacity\n"));
+ else
+ DEBUG((EFI_D_ERROR, "- PrintCSD Version Higher than v3.3\n"));
+
+ DEBUG((EFI_D_ERROR, "\t- Supported card command class: 0x%X\n",MMC_CSD_GET_CCC(csd)));
+ DEBUG((EFI_D_ERROR, "\t- Speed: %a %a\n",str_value[(MMC_CSD_GET_TRANSPEED(csd) >> 3) & 0xF],str_unit[MMC_CSD_GET_TRANSPEED(csd) & 7]));
+ DEBUG((EFI_D_ERROR, "\t- Maximum Read Data Block: %d\n",2 << (MMC_CSD_GET_READBLLEN(csd)-1)));
+ DEBUG((EFI_D_ERROR, "\t- Maximum Write Data Block: %d\n",2 << (MMC_CSD_GET_WRITEBLLEN(csd)-1)));
+
+ if (!MMC_CSD_GET_FILEFORMATGRP(csd)) {
+ val32 = MMC_CSD_GET_FILEFORMAT(csd);
+ if (val32 == 0) DEBUG((EFI_D_ERROR, "\t- Format(0): Hard disk-like file system with partition table\n"));
+ else if (val32 == 1) DEBUG((EFI_D_ERROR, "\t- Format(1): DOS FAT (floppy-like) with boot sector only (no partition table)\n"));
+ else if (val32 == 2) DEBUG((EFI_D_ERROR, "\t- Format(2): Universal File Format\n"));
+ else DEBUG((EFI_D_ERROR, "\t- Format(3): Others/Unknown\n"));
+ } else {
+ DEBUG((EFI_D_ERROR, "\t- Format: Reserved\n"));
+ }
+}
+
+VOID PrintRCA(UINT32 rca) {
+ DEBUG((EFI_D_ERROR, "- PrintRCA: 0x%X\n",rca));
+ DEBUG((EFI_D_ERROR, "\t- Status: 0x%X\n",rca & 0xFFFF));
+ DEBUG((EFI_D_ERROR, "\t- RCA: 0x%X\n",(rca >> 16) & 0xFFFF));
+}
+
+VOID PrintResponseR1(UINT32 response) {
+ DEBUG((EFI_D_ERROR, "Response: 0x%X\n",response));
+ if (response & (1 << 8)) DEBUG((EFI_D_ERROR, "\t- READY_FOR_DATA\n"));
+
+ if (((response >> 9) & 0xF) == 0) DEBUG((EFI_D_ERROR, "\t- State: Idle\n"));
+ else if (((response >> 9) & 0xF) == 1) DEBUG((EFI_D_ERROR, "\t- State: Ready\n"));
+ else if (((response >> 9) & 0xF) == 2) DEBUG((EFI_D_ERROR, "\t- State: Ident\n"));
+ else if (((response >> 9) & 0xF) == 3) DEBUG((EFI_D_ERROR, "\t- State: StandBy\n"));
+ else if (((response >> 9) & 0xF) == 4) DEBUG((EFI_D_ERROR, "\t- State: Tran\n"));
+ else if (((response >> 9) & 0xF) == 5) DEBUG((EFI_D_ERROR, "\t- State: Data\n"));
+ else if (((response >> 9) & 0xF) == 6) DEBUG((EFI_D_ERROR, "\t- State: Rcv\n"));
+ else if (((response >> 9) & 0xF) == 7) DEBUG((EFI_D_ERROR, "\t- State: Prg\n"));
+ else if (((response >> 9) & 0xF) == 8) DEBUG((EFI_D_ERROR, "\t- State: Dis\n"));
+ else DEBUG((EFI_D_ERROR, "\t- State: Reserved\n"));
+}
+
+EFI_STATUS
+EFIAPI
+MmcIdentificationMode (
+ MMC_HOST_INSTANCE *MmcHostInstance
+ ) {
+ EFI_STATUS Status;
+ UINT32 Response[4];
+ UINTN timer;
+ UINTN CmdArg;
+ BOOLEAN bHCS;
+ EFI_MMC_HOST_PROTOCOL *MmcHost;
+
+ MmcHost = MmcHostInstance->MmcHost;
+ CmdArg = 0;
+ bHCS = FALSE;
+
+ if (MmcHost == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // We can get into this function if we restart the identification mode
+ if (MmcHostInstance->State == MmcHwInitializationState) {
+ // Initialize the MMC Host HW
+ Status = MmcNotifyState (MmcHostInstance, MmcHwInitializationState);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcHwInitializationState\n"));
+ return Status;
+ }
+ } else {
+ //Note: Could even be used in all cases. But it looks this command could put the state machine into inactive for some cards
+ Status = MmcHost->SendCommand(MMC_CMD0, 0);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD0): Error\n"));
+ return Status;
+ }
+ }
+
+ Status = MmcNotifyState (MmcHostInstance, MmcIdleState);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcIdleState\n"));
+ return Status;
+ }
+
+ // Are we using SDIO ?
+ Status = MmcHost->SendCommand(MMC_CMD5, 0);
+ if (Status == EFI_SUCCESS) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD5): Error - SDIO not supported.\n"));
+ return EFI_UNSUPPORTED;
+ }
+
+ // Check which kind of card we are using. Ver2.00 or later SD Memory Card (PL180 is SD v1.1)
+ CmdArg = (0x0UL << 12 | BIT8 | 0xCEUL << 0);
+ Status = MmcHost->SendCommand(MMC_CMD8, CmdArg);
+ if (Status == EFI_SUCCESS) {
+ DEBUG ((EFI_D_ERROR, "Card is SD2.0 => Supports high capacity\n"));
+ bHCS = TRUE;
+ MmcHost->ReceiveResponse(MMC_RESPONSE_TYPE_R7,Response);
+ PrintResponseR1(Response[0]);
+ } else {
+ DEBUG ((EFI_D_ERROR, "Not a SD2.0 Card\n"));
+ }
+
+ // We need to wait for the MMC or SD card is ready => (gCardInfo.OCRData.Busy == 1)
+ timer = MAX_RETRY_COUNT;
+ while (timer > 0) {
+ // SD Card or MMC Card ? CMD55 indicates to the card that the next command is an application specific command
+ Status = MmcHost->SendCommand(MMC_CMD55, 0);
+ if (Status == EFI_SUCCESS) {
+ DEBUG ((EFI_D_INFO, "Card should be SD\n"));
+ if (bHCS) {
+ MmcHostInstance->CardInfo.CardType = SD_CARD_2;
+ } else {
+ MmcHostInstance->CardInfo.CardType = SD_CARD;
+ }
+
+ // Note: The first time CmdArg will be zero
+ CmdArg = ((UINTN *) &(MmcHostInstance->CardInfo.OCRData))[0];
+ if (bHCS) {
+ CmdArg |= BIT30;
+ }
+ Status = MmcHost->SendCommand(MMC_ACMD41, CmdArg);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode(ACMD41): Error\n"));
+ return Status;
+ }
+ MmcHost->ReceiveResponse(MMC_RESPONSE_TYPE_OCR,Response);
+ ((UINT32 *) &(MmcHostInstance->CardInfo.OCRData))[0] = Response[0];
+ } else {
+ DEBUG ((EFI_D_INFO, "Card should be MMC\n"));
+ MmcHostInstance->CardInfo.CardType = MMC_CARD;
+
+ Status = MmcHost->SendCommand(MMC_CMD1, 0x800000);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode(ACMD41): Error\n"));
+ return Status;
+ }
+ MmcHost->ReceiveResponse(MMC_RESPONSE_TYPE_OCR,Response);
+ ((UINT32 *) &(MmcHostInstance->CardInfo.OCRData))[0] = Response[0];
+ }
+
+ if (MmcHostInstance->CardInfo.OCRData.Busy == 0) {
+ MicroSecondDelay(10*1000);
+ timer--;
+ } else {
+ if ((MmcHostInstance->CardInfo.CardType == SD_CARD_2) && (MmcHostInstance->CardInfo.OCRData.AccessMode & BIT1)) {
+ MmcHostInstance->CardInfo.CardType = SD_CARD_2_HIGH;
+ DEBUG ((EFI_D_ERROR, "High capacity card.\n"));
+ }
+ break; // The MMC/SD card is ready. Continue the Identification Mode
+ }
+ }
+
+ if (timer == 0) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode(): No Card\n"));
+ ASSERT(0);
+ return EFI_NO_MEDIA;
+ } else {
+ PrintOCR(Response[0]);
+ }
+
+ Status = MmcNotifyState (MmcHostInstance, MmcReadyState);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcReadyState\n"));
+ return Status;
+ }
+
+ Status = MmcHost->SendCommand(MMC_CMD2, 0);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD2): Error\n"));
+ ASSERT(0);
+ return Status;
+ }
+ MmcHost->ReceiveResponse(MMC_RESPONSE_TYPE_CID,Response);
+ PrintCID(Response);
+
+ Status = MmcNotifyState (MmcHostInstance, MmcIdentificationState);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcIdentificationState\n"));
+ return Status;
+ }
+
+ CmdArg = 0;
+ Status = MmcHost->SendCommand(MMC_CMD3, CmdArg);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD3): Error\n"));
+ return Status;
+ }
+ MmcHost->ReceiveResponse(MMC_RESPONSE_TYPE_RCA,Response);
+ PrintRCA(Response[0]);
+
+ // For MMC card, RCA is assigned by CMD3 while CMD3 dumps the RCA for SD card
+ if (MmcHostInstance->CardInfo.CardType != MMC_CARD) {
+ MmcHostInstance->CardInfo.RCA = Response[0] >> 16;
+ } else {
+ MmcHostInstance->CardInfo.RCA = CmdArg;
+ }
+
+ Status = MmcNotifyState (MmcHostInstance, MmcStandByState);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcStandByState\n"));
+ return Status;
+ }
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+MmcReset (
+ IN EFI_BLOCK_IO_PROTOCOL *This,
+ IN BOOLEAN ExtendedVerification
+ ) {
+ // Implement me. Either send a CMD0 (could not work for some MMC host) or just turn off/turn
+ // on power and restart Identification mode
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+MmcDetectCard (
+ EFI_MMC_HOST_PROTOCOL *MmcHost
+ )
+{
+ if (!MmcHost->IsCardPresent()) {
+ return EFI_NO_MEDIA;
+ } else {
+ return EFI_SUCCESS;
+ }
+}
+
+#define MMCI0_BLOCKLEN 512
+#define MMCI0_TIMEOUT 10000
+
+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 CardSize, NumBlocks, BlockSize, CmdArg;
+ UINTN timer;
+ UINTN Cmd;
+ MMC_HOST_INSTANCE *MmcHostInstance;
+ EFI_MMC_HOST_PROTOCOL *MmcHost;
+ UINTN BytesRemainingToBeTransfered;
+ UINTN BlockCount = 1;
+
+ MmcHostInstance = MMC_HOST_INSTANCE_FROM_BLOCK_IO_THIS(This);
+ ASSERT(MmcHostInstance != 0);
+ MmcHost = MmcHostInstance->MmcHost;
+ ASSERT(MmcHost);
+
+ if (MmcHost == 0) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // Check if a Card is Present
+ if (!MmcHost->IsCardPresent()) {
+ MmcHostInstance->BlockIo.Media->MediaPresent = FALSE;
+ MmcHostInstance->BlockIo.Media->LastBlock = 0;
+ MmcHostInstance->BlockIo.Media->BlockSize = 512; // Should be zero but there is a bug in DiskIo
+ MmcHostInstance->BlockIo.Media->ReadOnly = FALSE;
+ return EFI_NO_MEDIA;
+ }
+
+ // If the driver has not been initialized yet then go into Iddentification Mode
+ if (MmcHostInstance->State == MmcHwInitializationState) {
+ MmcIdentificationMode (MmcHostInstance);
+
+ CmdArg = MmcHostInstance->CardInfo.RCA << 16;
+ Status = MmcHost->SendCommand(MMC_CMD9, CmdArg);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD9): Error\n"));
+ ASSERT(0);
+ return Status;
+ }
+ MmcHost->ReceiveResponse(MMC_RESPONSE_TYPE_CSD,Response);
+ PrintCSD(Response);
+
+
+ if (MmcHostInstance->CardInfo.CardType == SD_CARD_2_HIGH) {
+ ASSERT(0); //TODO: Implementation needed
+ CardSize = MMC_CSD_GET_DEVICESIZE(Response);
+ NumBlocks = ((CardSize + 1) * 1024);;
+ BlockSize = 1 << MMC_CSD_GET_READBLLEN(Response);
+ } else {
+ CardSize = MMC_CSD_GET_DEVICESIZE(Response);
+ NumBlocks = (CardSize + 1) * (1 << (MMC_CSD_GET_DEVICESIZEMULT(Response) + 2));
+ BlockSize = 1 << MMC_CSD_GET_READBLLEN(Response);
+ }
+
+ //For >=2G card, BlockSize may be 1K, but the transfer size is 512 bytes.
+ if (BlockSize > 512) {
+ NumBlocks = MultU64x32(NumBlocks, BlockSize/512);
+ BlockSize = 512;
+ }
+
+ MmcHostInstance->BlockIo.Media->LastBlock = (NumBlocks - 1);
+ MmcHostInstance->BlockIo.Media->BlockSize = BlockSize;
+ MmcHostInstance->BlockIo.Media->ReadOnly = MmcHost->IsReadOnly();
+ MmcHostInstance->BlockIo.Media->MediaPresent = TRUE;
+ MmcHostInstance->BlockIo.Media->MediaId++;
+
+ CmdArg = MmcHostInstance->CardInfo.RCA << 16;
+ Status = MmcHost->SendCommand(MMC_CMD7, CmdArg);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD7): Error\n"));
+ ASSERT(0);
+ return Status;
+ }
+
+ Status = MmcNotifyState (MmcHostInstance, MmcTransferState);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcTransferState\n"));
+ return Status;
+ }
+ } else {
+ // Maybe test if the card has changed to update gMmcMedia information
+ if (MmcHostInstance->State == MmcTransferState) {
+ //DEBUG((EFI_D_ERROR, "MmcIdentificationMode() : MmcTransferState\n"));
+ } else if (MmcHostInstance->State == MmcStandByState) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode() : MmcStandByState\n"));
+ } else {
+ ASSERT(0);
+ }
+ }
+
+ if (Lba > This->Media->LastBlock) {
+ ASSERT(0);
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if ((BufferSize % This->Media->BlockSize) != 0) {
+ ASSERT(0);
+ return EFI_BAD_BUFFER_SIZE;
+ }
+
+ BytesRemainingToBeTransfered = BufferSize;
+ while (BytesRemainingToBeTransfered > 0) {
+ // Set Block Length
+ Status = MmcHost->SendCommand(MMC_CMD16, This->Media->BlockSize);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD16): Error This->Media->BlockSize:%d\n",This->Media->BlockSize));
+ ASSERT(0);
+ return Status;
+ }
+
+ // Block Count (not used). Could return an error for SD card
+ MmcHost->SendCommand(MMC_CMD23, BlockCount);
+
+ //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) {
+#ifndef USE_STREAM
+ // Read a single block
+ Cmd = MMC_CMD17;
+#else
+ //TODO: Should we support read stream (MMC_CMD11)
+#endif
+ } else {
+#ifndef USE_STREAM
+ // Write a single block
+ Cmd = MMC_CMD24;
+#else
+ //TODO: Should we support write stream (MMC_CMD20)
+#endif
+ }
+ Status = MmcHost->SendCommand(Cmd, CmdArg);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD%d): Error\n",Cmd));
+ ASSERT(0);
+ return Status;
+ }
+
+ if (Transfer == MMC_IOBLOCKS_READ) {
+#ifndef USE_STREAM
+ // Read one block of Data
+ Status = MmcHost->ReadBlockData(Lba,This->Media->BlockSize,Buffer);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_BLKIO, "MmcIdentificationMode(): Error Read Block Data"));
+ ASSERT(0);
+ return Status;
+ }
+#else
+ //TODO: Read a steam
+ ASSERT(0);
+#endif
+ Status = MmcNotifyState (MmcHostInstance, MmcProgrammingState);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcProgrammingState\n"));
+ return Status;
+ }
+ } else {
+#ifndef USE_STREAM
+ // Write one block of Data
+ Status = MmcHost->WriteBlockData(Lba,This->Media->BlockSize,Buffer);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_BLKIO, "MmcIdentificationMode(): Error Write Block Data"));
+ ASSERT(0);
+ return Status;
+ }
+#else
+ //TODO: Write a steam
+ ASSERT(0);
+#endif
+ }
+
+ // Command 12 - Stop transmission (ends read)
+ Status = MmcHost->SendCommand(MMC_CMD12, 0);
+ MmcHost->ReceiveResponse(MMC_RESPONSE_TYPE_R1b,Response);
+
+ // Command 13 - Read status and wait for programming to complete (return to tran)
+ timer = MMCI0_TIMEOUT;
+ while ((MMC_R0_CURRENTSTATE(Response) != MMC_R0_STATE_TRAN) && timer) {
+ MmcHost->SendCommand(MMC_CMD13, 0);
+ MmcHost->ReceiveResponse(MMC_RESPONSE_TYPE_R1,Response);
+ NanoSecondDelay(100);
+ timer--;
+ }
+
+ Status = MmcNotifyState (MmcHostInstance, MmcTransferState);
+ if (EFI_ERROR(Status)) {
+ DEBUG((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcTransferState\n"));
+ return Status;
+ }
+
+ BytesRemainingToBeTransfered -= This->Media->BlockSize;
+ Lba += BlockCount;
+ Buffer = (UINT8 *)Buffer + This->Media->BlockSize;
+ }
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+MmcReadBlocks (
+ IN EFI_BLOCK_IO_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN EFI_LBA Lba,
+ IN UINTN BufferSize,
+ OUT VOID *Buffer
+ ) {
+ return MmcIoBlocks (This, MMC_IOBLOCKS_READ, MediaId, Lba, BufferSize, Buffer);
+}
+
+EFI_STATUS
+EFIAPI
+MmcWriteBlocks (
+ IN EFI_BLOCK_IO_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN EFI_LBA Lba,
+ IN UINTN BufferSize,
+ IN VOID *Buffer
+ ) {
+ return MmcIoBlocks (This, MMC_IOBLOCKS_WRITE, MediaId, Lba, BufferSize, Buffer);
+}
+
+EFI_STATUS
+EFIAPI
+MmcFlushBlocks (
+ IN EFI_BLOCK_IO_PROTOCOL *This
+ ) {
+ return EFI_SUCCESS;
+}
+
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