/** @file MMC/SD Card driver for OMAP 35xx (SDIO not supported) This driver always produces a BlockIo protocol but it starts off with no Media present. A TimerCallBack detects when media is inserted or removed and after a media change event a call to BlockIo ReadBlocks/WriteBlocks will cause the media to be detected (or removed) and the BlockIo Media structure will get updated. No MMC/SD Card harward registers are updated until the first BlockIo ReadBlocks/WriteBlocks after media has been insterted (booting with a card plugged in counts as an insertion event). Copyright (c) 2008 - 2009, Apple Inc. 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 "MMCHS.h" EFI_BLOCK_IO_MEDIA gMMCHSMedia = { SIGNATURE_32('s','d','i','o'), // MediaId TRUE, // RemovableMedia FALSE, // MediaPresent FALSE, // LogicalPartition FALSE, // ReadOnly FALSE, // WriteCaching 512, // BlockSize 4, // IoAlign 0, // Pad 0 // LastBlock }; typedef struct { VENDOR_DEVICE_PATH Mmc; EFI_DEVICE_PATH End; } MMCHS_DEVICE_PATH; MMCHS_DEVICE_PATH gMmcHsDevicePath = { { HARDWARE_DEVICE_PATH, HW_VENDOR_DP, (UINT8)(sizeof(VENDOR_DEVICE_PATH)), (UINT8)((sizeof(VENDOR_DEVICE_PATH)) >> 8), 0xb615f1f5, 0x5088, 0x43cd, 0x80, 0x9c, 0xa1, 0x6e, 0x52, 0x48, 0x7d, 0x00 }, { END_DEVICE_PATH_TYPE, END_ENTIRE_DEVICE_PATH_SUBTYPE, sizeof (EFI_DEVICE_PATH_PROTOCOL), 0 } }; CARD_INFO gCardInfo; EMBEDDED_EXTERNAL_DEVICE *gTPS65950; EFI_EVENT gTimerEvent; BOOLEAN gMediaChange = FALSE; // // Internal Functions // VOID ParseCardCIDData ( UINT32 Response0, UINT32 Response1, UINT32 Response2, UINT32 Response3 ) { gCardInfo.CIDData.MDT = ((Response0 >> 8) & 0xFFF); gCardInfo.CIDData.PSN = (((Response0 >> 24) & 0xFF) | ((Response1 & 0xFFFFFF) << 8)); gCardInfo.CIDData.PRV = ((Response1 >> 24) & 0xFF); gCardInfo.CIDData.PNM[4] = ((Response2) & 0xFF); gCardInfo.CIDData.PNM[3] = ((Response2 >> 8) & 0xFF); gCardInfo.CIDData.PNM[2] = ((Response2 >> 16) & 0xFF); gCardInfo.CIDData.PNM[1] = ((Response2 >> 24) & 0xFF); gCardInfo.CIDData.PNM[0] = ((Response3) & 0xFF); gCardInfo.CIDData.OID = ((Response3 >> 8) & 0xFFFF); gCardInfo.CIDData.MID = ((Response3 >> 24) & 0xFF); } VOID UpdateMMCHSClkFrequency ( UINTN NewCLKD ) { //Set Clock enable to 0x0 to not provide the clock to the card MmioAnd32 (MMCHS_SYSCTL, ~CEN); //Set new clock frequency. MmioAndThenOr32 (MMCHS_SYSCTL, ~CLKD_MASK, NewCLKD << 6); //Poll till Internal Clock Stable while ((MmioRead32 (MMCHS_SYSCTL) & ICS_MASK) != ICS); //Set Clock enable to 0x1 to provide the clock to the card MmioOr32 (MMCHS_SYSCTL, CEN); } EFI_STATUS SendCmd ( UINTN Cmd, UINTN CmdInterruptEnableVal, UINTN CmdArgument ) { UINTN MmcStatus; UINTN RetryCount = 0; //Check if command line is in use or not. Poll till command line is available. while ((MmioRead32 (MMCHS_PSTATE) & DATI_MASK) == DATI_NOT_ALLOWED); //Provide the block size. MmioWrite32 (MMCHS_BLK, BLEN_512BYTES); //Setting Data timeout counter value to max value. MmioAndThenOr32 (MMCHS_SYSCTL, ~DTO_MASK, DTO_VAL); //Clear Status register. MmioWrite32 (MMCHS_STAT, 0xFFFFFFFF); //Set command argument register MmioWrite32 (MMCHS_ARG, CmdArgument); //Enable interrupt enable events to occur MmioWrite32 (MMCHS_IE, CmdInterruptEnableVal); //Send a command MmioWrite32 (MMCHS_CMD, Cmd); //Check for the command status. while (RetryCount < MAX_RETRY_COUNT) { do { MmcStatus = MmioRead32 (MMCHS_STAT); } while (MmcStatus == 0); //Read status of command response if ((MmcStatus & ERRI) != 0) { //Perform soft-reset for mmci_cmd line. MmioOr32 (MMCHS_SYSCTL, SRC); while ((MmioRead32 (MMCHS_SYSCTL) & SRC)); DEBUG ((EFI_D_INFO, "MmcStatus: %x\n", MmcStatus)); return EFI_DEVICE_ERROR; } //Check if command is completed. if ((MmcStatus & CC) == CC) { MmioWrite32 (MMCHS_STAT, CC); break; } RetryCount++; } if (RetryCount == MAX_RETRY_COUNT) { return EFI_TIMEOUT; } return EFI_SUCCESS; } VOID GetBlockInformation ( UINTN *BlockSize, UINTN *NumBlocks ) { CSD_SDV2 *CsdSDV2Data; UINTN CardSize; if (gCardInfo.CardType == SD_CARD_2_HIGH) { CsdSDV2Data = (CSD_SDV2 *)&gCardInfo.CSDData; //Populate BlockSize. *BlockSize = (0x1UL << CsdSDV2Data->READ_BL_LEN); //Calculate Total number of blocks. CardSize = CsdSDV2Data->C_SIZELow16 | (CsdSDV2Data->C_SIZEHigh6 << 2); *NumBlocks = ((CardSize + 1) * 1024); } else { //Populate BlockSize. *BlockSize = (0x1UL << gCardInfo.CSDData.READ_BL_LEN); //Calculate Total number of blocks. CardSize = gCardInfo.CSDData.C_SIZELow2 | (gCardInfo.CSDData.C_SIZEHigh10 << 2); *NumBlocks = (CardSize + 1) * (1 << (gCardInfo.CSDData.C_SIZE_MULT + 2)); } //For >=2G card, BlockSize may be 1K, but the transfer size is 512 bytes. if (*BlockSize > 512) { *NumBlocks = MultU64x32(*NumBlocks, *BlockSize/2); *BlockSize = 512; } DEBUG ((EFI_D_INFO, "Card type: %x, BlockSize: %x, NumBlocks: %x\n", gCardInfo.CardType, *BlockSize, *NumBlocks)); } VOID CalculateCardCLKD ( UINTN *ClockFrequencySelect ) { UINT8 MaxDataTransferRate; UINTN TransferRateValue = 0; UINTN TimeValue = 0 ; UINTN Frequency = 0; MaxDataTransferRate = gCardInfo.CSDData.TRAN_SPEED; // For SD Cards we would need to send CMD6 to set // speeds abouve 25MHz. High Speed mode 50 MHz and up //Calculate Transfer rate unit (Bits 2:0 of TRAN_SPEED) switch (MaxDataTransferRate & 0x7) { case 0: TransferRateValue = 100 * 1000; break; case 1: TransferRateValue = 1 * 1000 * 1000; break; case 2: TransferRateValue = 10 * 1000 * 1000; break; case 3: TransferRateValue = 100 * 1000 * 1000; break; default: DEBUG((EFI_D_ERROR, "Invalid parameter.\n")); ASSERT(FALSE); } //Calculate Time value (Bits 6:3 of TRAN_SPEED) switch ((MaxDataTransferRate >> 3) & 0xF) { case 1: TimeValue = 10; break; case 2: TimeValue = 12; break; case 3: TimeValue = 13; break; case 4: TimeValue = 15; break; case 5: TimeValue = 20; break; case 6: TimeValue = 25; break; case 7: TimeValue = 30; break; case 8: TimeValue = 35; break; case 9: TimeValue = 40; break; case 10: TimeValue = 45; break; case 11: TimeValue = 50; break; case 12: TimeValue = 55; break; case 13: TimeValue = 60; break; case 14: TimeValue = 70; break; case 15: TimeValue = 80; break; default: DEBUG((EFI_D_ERROR, "Invalid parameter.\n")); ASSERT(FALSE); } Frequency = TransferRateValue * TimeValue/10; //Calculate Clock divider value to program in MMCHS_SYSCTL[CLKD] field. *ClockFrequencySelect = ((MMC_REFERENCE_CLK/Frequency) + 1); DEBUG ((EFI_D_INFO, "MaxDataTransferRate: 0x%x, Frequency: %d KHz, ClockFrequencySelect: %x\n", MaxDataTransferRate, Frequency/1000, *ClockFrequencySelect)); } VOID GetCardConfigurationData ( VOID ) { UINTN BlockSize; UINTN NumBlocks; UINTN ClockFrequencySelect; //Calculate BlockSize and Total number of blocks in the detected card. GetBlockInformation(&BlockSize, &NumBlocks); gCardInfo.BlockSize = BlockSize; gCardInfo.NumBlocks = NumBlocks; //Calculate Card clock divider value. CalculateCardCLKD(&ClockFrequencySelect); gCardInfo.ClockFrequencySelect = ClockFrequencySelect; } EFI_STATUS InitializeMMCHS ( VOID ) { UINT8 Data = 0; EFI_STATUS Status; //Select Device group to belong to P1 device group in Power IC. Data = DEV_GRP_P1; Status = gTPS65950->Write (gTPS65950, EXTERNAL_DEVICE_REGISTER(I2C_ADDR_GRP_ID4, VMMC1_DEV_GRP), 1, &Data); ASSERT_EFI_ERROR(Status); //Configure voltage regulator for MMC1 in Power IC to output 3.0 voltage. Data = VSEL_3_00V; Status = gTPS65950->Write (gTPS65950, EXTERNAL_DEVICE_REGISTER(I2C_ADDR_GRP_ID4, VMMC1_DEDICATED_REG), 1, &Data); ASSERT_EFI_ERROR(Status); //After ramping up voltage, set VDDS stable bit to indicate that voltage level is stable. MmioOr32 (CONTROL_PBIAS_LITE, (PBIASLITEVMODE0 | PBIASLITEPWRDNZ0 | PBIASSPEEDCTRL0 | PBIASLITEVMODE1 | PBIASLITEWRDNZ1)); // Enable WP GPIO MmioAndThenOr32 (GPIO1_BASE + GPIO_OE, ~BIT23, BIT23); // Enable Card Detect Data = CARD_DETECT_ENABLE; gTPS65950->Write (gTPS65950, EXTERNAL_DEVICE_REGISTER(I2C_ADDR_GRP_ID2, TPS65950_GPIO_CTRL), 1, &Data); return Status; } EFI_STATUS PerformCardIdenfication ( VOID ) { EFI_STATUS Status; UINTN CmdArgument = 0; UINTN Response = 0; UINTN RetryCount = 0; BOOLEAN SDCmd8Supported = FALSE; //Enable interrupts. MmioWrite32 (MMCHS_IE, (BADA_EN | CERR_EN | DEB_EN | DCRC_EN | DTO_EN | CIE_EN | CEB_EN | CCRC_EN | CTO_EN | BRR_EN | BWR_EN | TC_EN | CC_EN)); //Controller INIT procedure start. MmioOr32 (MMCHS_CON, INIT); MmioWrite32 (MMCHS_CMD, 0x00000000); while (!(MmioRead32 (MMCHS_STAT) & CC)); //Wait for 1 ms gBS->Stall(1000); //Set CC bit to 0x1 to clear the flag MmioOr32 (MMCHS_STAT, CC); //Retry INIT procedure. MmioWrite32 (MMCHS_CMD, 0x00000000); while (!(MmioRead32 (MMCHS_STAT) & CC)); //End initialization sequence MmioAnd32 (MMCHS_CON, ~INIT); MmioOr32 (MMCHS_HCTL, (SDVS_3_0_V | DTW_1_BIT | SDBP_ON)); //Change clock frequency to 400KHz to fit protocol UpdateMMCHSClkFrequency(CLKD_400KHZ); MmioOr32 (MMCHS_CON, OD); //Send CMD0 command. Status = SendCmd (CMD0, CMD0_INT_EN, CmdArgument); if (EFI_ERROR(Status)) { DEBUG ((EFI_D_ERROR, "Cmd0 fails.\n")); return Status; } DEBUG ((EFI_D_INFO, "CMD0 response: %x\n", MmioRead32 (MMCHS_RSP10))); //Send CMD5 command. Status = SendCmd (CMD5, CMD5_INT_EN, CmdArgument); if (Status == EFI_SUCCESS) { DEBUG ((EFI_D_ERROR, "CMD5 Success. SDIO card. Follow SDIO card specification.\n")); DEBUG ((EFI_D_INFO, "CMD5 response: %x\n", MmioRead32 (MMCHS_RSP10))); //NOTE: Returning unsupported error for now. Need to implement SDIO specification. return EFI_UNSUPPORTED; } else { DEBUG ((EFI_D_INFO, "CMD5 fails. Not an SDIO card.\n")); } MmioOr32 (MMCHS_SYSCTL, SRC); gBS->Stall(1000); while ((MmioRead32 (MMCHS_SYSCTL) & SRC)); //Send CMD8 command. (New v2.00 command for Voltage check) //Only 2.7V - 3.6V is supported for SD2.0, only SD 2.0 card can pass. //MMC & SD1.1 card will fail this command. CmdArgument = CMD8_ARG; Status = SendCmd (CMD8, CMD8_INT_EN, CmdArgument); if (Status == EFI_SUCCESS) { Response = MmioRead32 (MMCHS_RSP10); DEBUG ((EFI_D_INFO, "CMD8 success. CMD8 response: %x\n", Response)); if (Response != CmdArgument) { return EFI_DEVICE_ERROR; } DEBUG ((EFI_D_INFO, "Card is SD2.0\n")); SDCmd8Supported = TRUE; //Supports high capacity. } else { DEBUG ((EFI_D_INFO, "CMD8 fails. Not an SD2.0 card.\n")); } MmioOr32 (MMCHS_SYSCTL, SRC); gBS->Stall(1000); while ((MmioRead32 (MMCHS_SYSCTL) & SRC)); //Poll till card is busy while (RetryCount < MAX_RETRY_COUNT) { //Send CMD55 command. CmdArgument = 0; Status = SendCmd (CMD55, CMD55_INT_EN, CmdArgument); if (Status == EFI_SUCCESS) { DEBUG ((EFI_D_INFO, "CMD55 success. CMD55 response: %x\n", MmioRead32 (MMCHS_RSP10))); gCardInfo.CardType = SD_CARD; } else { DEBUG ((EFI_D_INFO, "CMD55 fails.\n")); gCardInfo.CardType = MMC_CARD; } //Send appropriate command for the card type which got detected. if (gCardInfo.CardType == SD_CARD) { CmdArgument = ((UINTN *) &(gCardInfo.OCRData))[0]; //Set HCS bit. if (SDCmd8Supported) { CmdArgument |= HCS; } Status = SendCmd (ACMD41, ACMD41_INT_EN, CmdArgument); if (EFI_ERROR(Status)) { DEBUG ((EFI_D_INFO, "ACMD41 fails.\n")); return Status; } ((UINT32 *) &(gCardInfo.OCRData))[0] = MmioRead32 (MMCHS_RSP10); DEBUG ((EFI_D_INFO, "SD card detected. ACMD41 OCR: %x\n", ((UINT32 *) &(gCardInfo.OCRData))[0])); } else if (gCardInfo.CardType == MMC_CARD) { CmdArgument = 0; Status = SendCmd (CMD1, CMD1_INT_EN, CmdArgument); if (EFI_ERROR(Status)) { DEBUG ((EFI_D_INFO, "CMD1 fails.\n")); return Status; } Response = MmioRead32 (MMCHS_RSP10); DEBUG ((EFI_D_INFO, "MMC card detected.. CMD1 response: %x\n", Response)); //NOTE: For now, I am skipping this since I only have an SD card. //Compare card OCR and host OCR (Section 22.6.1.3.2.4) return EFI_UNSUPPORTED; //For now, MMC is not supported. } //Poll the card until it is out of its power-up sequence. if (gCardInfo.OCRData.Busy == 1) { if (SDCmd8Supported) { gCardInfo.CardType = SD_CARD_2; } //Card is ready. Check CCS (Card capacity status) bit (bit#30). //SD 2.0 standard card will response with CCS 0, SD high capacity card will respond with CCS 1. if (gCardInfo.OCRData.AccessMode & BIT1) { gCardInfo.CardType = SD_CARD_2_HIGH; DEBUG ((EFI_D_INFO, "High capacity card.\n")); } else { DEBUG ((EFI_D_INFO, "Standard capacity card.\n")); } break; } gBS->Stall(1000); RetryCount++; } if (RetryCount == MAX_RETRY_COUNT) { DEBUG ((EFI_D_ERROR, "Timeout error. RetryCount: %d\n", RetryCount)); return EFI_TIMEOUT; } //Read CID data. CmdArgument = 0; Status = SendCmd (CMD2, CMD2_INT_EN, CmdArgument); if (EFI_ERROR(Status)) { DEBUG ((EFI_D_ERROR, "CMD2 fails. Status: %x\n", Status)); return Status; } DEBUG ((EFI_D_INFO, "CMD2 response: %x %x %x %x\n", MmioRead32 (MMCHS_RSP10), MmioRead32 (MMCHS_RSP32), MmioRead32 (MMCHS_RSP54), MmioRead32 (MMCHS_RSP76))); //Parse CID register data. ParseCardCIDData(MmioRead32 (MMCHS_RSP10), MmioRead32 (MMCHS_RSP32), MmioRead32 (MMCHS_RSP54), MmioRead32 (MMCHS_RSP76)); //Read RCA CmdArgument = 0; Status = SendCmd (CMD3, CMD3_INT_EN, CmdArgument); if (EFI_ERROR(Status)) { DEBUG ((EFI_D_ERROR, "CMD3 fails. Status: %x\n", Status)); return Status; } //Set RCA for the detected card. RCA is CMD3 response. gCardInfo.RCA = (MmioRead32 (MMCHS_RSP10) >> 16); DEBUG ((EFI_D_INFO, "CMD3 response: RCA %x\n", gCardInfo.RCA)); //MMC Bus setting change after card identification. MmioAnd32 (MMCHS_CON, ~OD); MmioOr32 (MMCHS_HCTL, SDVS_3_0_V); UpdateMMCHSClkFrequency(CLKD_400KHZ); //Set the clock frequency to 400KHz. return EFI_SUCCESS; } EFI_STATUS GetCardSpecificData ( VOID ) { EFI_STATUS Status; UINTN CmdArgument; //Send CMD9 to retrieve CSD. CmdArgument = gCardInfo.RCA << 16; Status = SendCmd (CMD9, CMD9_INT_EN, CmdArgument); if (EFI_ERROR(Status)) { DEBUG ((EFI_D_ERROR, "CMD9 fails. Status: %x\n", Status)); return Status; } //Populate 128-bit CSD register data. ((UINT32 *)&(gCardInfo.CSDData))[0] = MmioRead32 (MMCHS_RSP10); ((UINT32 *)&(gCardInfo.CSDData))[1] = MmioRead32 (MMCHS_RSP32); ((UINT32 *)&(gCardInfo.CSDData))[2] = MmioRead32 (MMCHS_RSP54); ((UINT32 *)&(gCardInfo.CSDData))[3] = MmioRead32 (MMCHS_RSP76); DEBUG ((EFI_D_INFO, "CMD9 response: %x %x %x %x\n", MmioRead32 (MMCHS_RSP10), MmioRead32 (MMCHS_RSP32), MmioRead32 (MMCHS_RSP54), MmioRead32 (MMCHS_RSP76))); //Calculate total number of blocks and max. data transfer rate supported by the detected card. GetCardConfigurationData(); return Status; } EFI_STATUS PerformCardConfiguration ( VOID ) { UINTN CmdArgument = 0; EFI_STATUS Status; //Send CMD7 CmdArgument = gCardInfo.RCA << 16; Status = SendCmd (CMD7, CMD7_INT_EN, CmdArgument); if (EFI_ERROR(Status)) { DEBUG ((EFI_D_ERROR, "CMD7 fails. Status: %x\n", Status)); return Status; } if ((gCardInfo.CardType != UNKNOWN_CARD) && (gCardInfo.CardType != MMC_CARD)) { // We could read SCR register, but SD Card Phys spec stats any SD Card shall // set SCR.SD_BUS_WIDTHS to support 4-bit mode, so why bother? // Send ACMD6 (application specific commands must be prefixed with CMD55) Status = SendCmd (CMD55, CMD55_INT_EN, CmdArgument); if (!EFI_ERROR (Status)) { // set device into 4-bit data bus mode Status = SendCmd (ACMD6, ACMD6_INT_EN, 0x2); if (!EFI_ERROR (Status)) { // Set host controler into 4-bit mode MmioOr32 (MMCHS_HCTL, DTW_4_BIT); DEBUG ((EFI_D_INFO, "SD Memory Card set to 4-bit mode\n")); } } } //Send CMD16 to set the block length CmdArgument = gCardInfo.BlockSize; Status = SendCmd (CMD16, CMD16_INT_EN, CmdArgument); if (EFI_ERROR(Status)) { DEBUG ((EFI_D_ERROR, "CMD16 fails. Status: %x\n", Status)); return Status; } //Change MMCHS clock frequency to what detected card can support. UpdateMMCHSClkFrequency(gCardInfo.ClockFrequencySelect); return EFI_SUCCESS; } EFI_STATUS ReadBlockData ( IN EFI_BLOCK_IO_PROTOCOL *This, OUT VOID *Buffer ) { UINTN MmcStatus; UINTN *DataBuffer = Buffer; UINTN DataSize = This->Media->BlockSize/4; UINTN Count; UINTN RetryCount = 0; //Check controller status to make sure there is no error. while (RetryCount < MAX_RETRY_COUNT) { do { //Read Status. MmcStatus = MmioRead32 (MMCHS_STAT); } while(MmcStatus == 0); //Check if Buffer read ready (BRR) bit is set? if (MmcStatus & BRR) { //Clear BRR bit MmioOr32 (MMCHS_STAT, BRR); //Read block worth of data. for (Count = 0; Count < DataSize; Count++) { *DataBuffer++ = MmioRead32 (MMCHS_DATA); } break; } RetryCount++; } if (RetryCount == MAX_RETRY_COUNT) { return EFI_TIMEOUT; } return EFI_SUCCESS; } EFI_STATUS WriteBlockData ( IN EFI_BLOCK_IO_PROTOCOL *This, OUT VOID *Buffer ) { UINTN MmcStatus; UINTN *DataBuffer = Buffer; UINTN DataSize = This->Media->BlockSize/4; UINTN Count; UINTN RetryCount = 0; //Check controller status to make sure there is no error. while (RetryCount < MAX_RETRY_COUNT) { do { //Read Status. MmcStatus = MmioRead32 (MMCHS_STAT); } while(MmcStatus == 0); //Check if Buffer write ready (BWR) bit is set? if (MmcStatus & BWR) { //Clear BWR bit MmioOr32 (MMCHS_STAT, BWR); //Write block worth of data. for (Count = 0; Count < DataSize; Count++) { MmioWrite32 (MMCHS_DATA, *DataBuffer++); } break; } RetryCount++; } if (RetryCount == MAX_RETRY_COUNT) { return EFI_TIMEOUT; } return EFI_SUCCESS; } EFI_STATUS DmaBlocks ( IN EFI_BLOCK_IO_PROTOCOL *This, IN UINTN Lba, IN OUT VOID *Buffer, IN UINTN BlockCount, IN OPERATION_TYPE OperationType ) { EFI_STATUS Status; UINTN DmaSize = 0; UINTN Cmd = 0; UINTN CmdInterruptEnable; UINTN CmdArgument; VOID *BufferMap; EFI_PHYSICAL_ADDRESS BufferAddress; OMAP_DMA4 Dma4; DMA_MAP_OPERATION DmaOperation; EFI_STATUS MmcStatus; UINTN RetryCount = 0; CpuDeadLoop (); // Map passed in buffer for DMA xfer DmaSize = BlockCount * This->Media->BlockSize; Status = DmaMap (DmaOperation, Buffer, &DmaSize, &BufferAddress, &BufferMap); if (EFI_ERROR (Status)) { return Status; } ZeroMem (&DmaOperation, sizeof (DMA_MAP_OPERATION)); Dma4.DataType = 2; // DMA4_CSDPi[1:0] 32-bit elements from MMCHS_DATA Dma4.SourceEndiansim = 0; // DMA4_CSDPi[21] Dma4.DestinationEndianism = 0; // DMA4_CSDPi[19] Dma4.SourcePacked = 0; // DMA4_CSDPi[6] Dma4.DestinationPacked = 0; // DMA4_CSDPi[13] Dma4.NumberOfElementPerFrame = This->Media->BlockSize/4; // DMA4_CENi (TRM 4K is optimum value) Dma4.NumberOfFramePerTransferBlock = BlockCount; // DMA4_CFNi Dma4.ReadPriority = 0; // DMA4_CCRi[6] Low priority read Dma4.WritePriority = 0; // DMA4_CCRi[23] Prefetech disabled //Populate the command information based on the operation type. if (OperationType == READ) { Cmd = CMD18; //Multiple block read CmdInterruptEnable = CMD18_INT_EN; DmaOperation = MapOperationBusMasterCommonBuffer; Dma4.ReadPortAccessType =0 ; // DMA4_CSDPi[8:7] Can not burst MMCHS_DATA reg Dma4.WritePortAccessType = 3; // DMA4_CSDPi[15:14] Memory burst 16x32 Dma4.WriteMode = 1; // DMA4_CSDPi[17:16] Write posted Dma4.SourceStartAddress = MMCHS_DATA; // DMA4_CSSAi Dma4.DestinationStartAddress = (UINT32)BufferAddress; // DMA4_CDSAi Dma4.SourceElementIndex = 1; // DMA4_CSEi Dma4.SourceFrameIndex = 0x200; // DMA4_CSFi Dma4.DestinationElementIndex = 1; // DMA4_CDEi Dma4.DestinationFrameIndex = 0; // DMA4_CDFi Dma4.ReadPortAccessMode = 0; // DMA4_CCRi[13:12] Always read MMCHS_DATA Dma4.WritePortAccessMode = 1; // DMA4_CCRi[15:14] Post increment memory address Dma4.ReadRequestNumber = 0x1e; // DMA4_CCRi[4:0] Syncro with MMCA_DMA_RX (61) Dma4.WriteRequestNumber = 1; // DMA4_CCRi[20:19] Syncro upper 0x3e == 62 (one based) } else if (OperationType == WRITE) { Cmd = CMD25; //Multiple block write CmdInterruptEnable = CMD25_INT_EN; DmaOperation = MapOperationBusMasterRead; Dma4.ReadPortAccessType = 3; // DMA4_CSDPi[8:7] Memory burst 16x32 Dma4.WritePortAccessType = 0; // DMA4_CSDPi[15:14] Can not burst MMCHS_DATA reg Dma4.WriteMode = 1; // DMA4_CSDPi[17:16] Write posted ??? Dma4.SourceStartAddress = (UINT32)BufferAddress; // DMA4_CSSAi Dma4.DestinationStartAddress = MMCHS_DATA; // DMA4_CDSAi Dma4.SourceElementIndex = 1; // DMA4_CSEi Dma4.SourceFrameIndex = 0x200; // DMA4_CSFi Dma4.DestinationElementIndex = 1; // DMA4_CDEi Dma4.DestinationFrameIndex = 0; // DMA4_CDFi Dma4.ReadPortAccessMode = 1; // DMA4_CCRi[13:12] Post increment memory address Dma4.WritePortAccessMode = 0; // DMA4_CCRi[15:14] Always write MMCHS_DATA Dma4.ReadRequestNumber = 0x1d; // DMA4_CCRi[4:0] Syncro with MMCA_DMA_TX (60) Dma4.WriteRequestNumber = 1; // DMA4_CCRi[20:19] Syncro upper 0x3d == 61 (one based) } else { return EFI_INVALID_PARAMETER; } EnableDmaChannel (2, &Dma4); //Set command argument based on the card access mode (Byte mode or Block mode) if (gCardInfo.OCRData.AccessMode & BIT1) { CmdArgument = Lba; } else { CmdArgument = Lba * This->Media->BlockSize; } //Send Command. Status = SendCmd (Cmd, CmdInterruptEnable, CmdArgument); if (EFI_ERROR (Status)) { DEBUG ((EFI_D_ERROR, "CMD fails. Status: %x\n", Status)); return Status; } //Check for the Transfer completion. while (RetryCount < MAX_RETRY_COUNT) { //Read Status do { MmcStatus = MmioRead32 (MMCHS_STAT); } while (MmcStatus == 0); //Check if Transfer complete (TC) bit is set? if (MmcStatus & TC) { break; } else { DEBUG ((EFI_D_ERROR, "MmcStatus for TC: %x\n", MmcStatus)); //Check if DEB, DCRC or DTO interrupt occured. if ((MmcStatus & DEB) | (MmcStatus & DCRC) | (MmcStatus & DTO)) { //There was an error during the data transfer. //Set SRD bit to 1 and wait until it return to 0x0. MmioOr32 (MMCHS_SYSCTL, SRD); while((MmioRead32 (MMCHS_SYSCTL) & SRD) != 0x0); DisableDmaChannel (2, DMA4_CSR_BLOCK, DMA4_CSR_ERR); DmaUnmap (BufferMap); return EFI_DEVICE_ERROR; } } RetryCount++; } DisableDmaChannel (2, DMA4_CSR_BLOCK, DMA4_CSR_ERR); Status = DmaUnmap (BufferMap); if (RetryCount == MAX_RETRY_COUNT) { DEBUG ((EFI_D_ERROR, "TransferBlockData timed out.\n")); return EFI_TIMEOUT; } return Status; } EFI_STATUS TransferBlock ( IN EFI_BLOCK_IO_PROTOCOL *This, IN UINTN Lba, IN OUT VOID *Buffer, IN OPERATION_TYPE OperationType ) { EFI_STATUS Status; UINTN MmcStatus; UINTN RetryCount = 0; UINTN Cmd = 0; UINTN CmdInterruptEnable = 0; UINTN CmdArgument = 0; //Populate the command information based on the operation type. if (OperationType == READ) { Cmd = CMD17; //Single block read CmdInterruptEnable = CMD18_INT_EN; } else if (OperationType == WRITE) { Cmd = CMD24; //Single block write CmdInterruptEnable = CMD24_INT_EN; } //Set command argument based on the card access mode (Byte mode or Block mode) if (gCardInfo.OCRData.AccessMode & BIT1) { CmdArgument = Lba; } else { CmdArgument = Lba * This->Media->BlockSize; } //Send Command. Status = SendCmd (Cmd, CmdInterruptEnable, CmdArgument); if (EFI_ERROR(Status)) { DEBUG ((EFI_D_ERROR, "CMD fails. Status: %x\n", Status)); return Status; } //Read or Write data. if (OperationType == READ) { Status = ReadBlockData (This, Buffer); if (EFI_ERROR(Status)) { DEBUG((EFI_D_ERROR, "ReadBlockData fails.\n")); return Status; } } else if (OperationType == WRITE) { Status = WriteBlockData (This, Buffer); if (EFI_ERROR(Status)) { DEBUG((EFI_D_ERROR, "WriteBlockData fails.\n")); return Status; } } //Check for the Transfer completion. while (RetryCount < MAX_RETRY_COUNT) { //Read Status do { MmcStatus = MmioRead32 (MMCHS_STAT); } while (MmcStatus == 0); //Check if Transfer complete (TC) bit is set? if (MmcStatus & TC) { break; } else { DEBUG ((EFI_D_ERROR, "MmcStatus for TC: %x\n", MmcStatus)); //Check if DEB, DCRC or DTO interrupt occured. if ((MmcStatus & DEB) | (MmcStatus & DCRC) | (MmcStatus & DTO)) { //There was an error during the data transfer. //Set SRD bit to 1 and wait until it return to 0x0. MmioOr32 (MMCHS_SYSCTL, SRD); while((MmioRead32 (MMCHS_SYSCTL) & SRD) != 0x0); return EFI_DEVICE_ERROR; } } RetryCount++; } if (RetryCount == MAX_RETRY_COUNT) { DEBUG ((EFI_D_ERROR, "TransferBlockData timed out.\n")); return EFI_TIMEOUT; } return EFI_SUCCESS; } BOOLEAN CardPresent ( VOID ) { EFI_STATUS Status; UINT8 Data; // // Card detect is a GPIO0 on the TPS65950 // Status = gTPS65950->Read (gTPS65950, EXTERNAL_DEVICE_REGISTER(I2C_ADDR_GRP_ID2, GPIODATAIN1), 1, &Data); if (EFI_ERROR (Status)) { return FALSE; } if ((Data & CARD_DETECT_BIT) == CARD_DETECT_BIT) { // No Card present return FALSE; } else { return TRUE; } } EFI_STATUS DetectCard ( VOID ) { EFI_STATUS Status; if (!CardPresent ()) { return EFI_NO_MEDIA; } //Initialize MMC host controller clocks. Status = InitializeMMCHS (); if (EFI_ERROR(Status)) { DEBUG ((EFI_D_ERROR, "Initialize MMC host controller fails. Status: %x\n", Status)); return Status; } //Software reset of the MMCHS host controller. MmioWrite32 (MMCHS_SYSCONFIG, SOFTRESET); gBS->Stall(1000); while ((MmioRead32 (MMCHS_SYSSTATUS) & RESETDONE_MASK) != RESETDONE); //Soft reset for all. MmioWrite32 (MMCHS_SYSCTL, SRA); gBS->Stall(1000); while ((MmioRead32 (MMCHS_SYSCTL) & SRA) != 0x0); //Voltage capabilities initialization. Activate VS18 and VS30. MmioOr32 (MMCHS_CAPA, (VS30 | VS18)); //Wakeup configuration MmioOr32 (MMCHS_SYSCONFIG, ENAWAKEUP); MmioOr32 (MMCHS_HCTL, IWE); //MMCHS Controller default initialization MmioOr32 (MMCHS_CON, (OD | DW8_1_4_BIT | CEATA_OFF)); MmioWrite32 (MMCHS_HCTL, (SDVS_3_0_V | DTW_1_BIT | SDBP_OFF)); //Enable internal clock MmioOr32 (MMCHS_SYSCTL, ICE); //Set the clock frequency to 80KHz. UpdateMMCHSClkFrequency (CLKD_80KHZ); //Enable SD bus power. MmioOr32 (MMCHS_HCTL, (SDBP_ON)); //Poll till SD bus power bit is set. while ((MmioRead32 (MMCHS_HCTL) & SDBP_MASK) != SDBP_ON); //Card idenfication Status = PerformCardIdenfication (); if (EFI_ERROR(Status)) { DEBUG ((EFI_D_ERROR, "No MMC/SD card detected.\n")); return Status; } //Get CSD (Card specific data) for the detected card. Status = GetCardSpecificData(); if (EFI_ERROR(Status)) { return Status; } //Configure the card in data transfer mode. Status = PerformCardConfiguration(); if (EFI_ERROR(Status)) { return Status; } //Patch the Media structure. gMMCHSMedia.LastBlock = (gCardInfo.NumBlocks - 1); gMMCHSMedia.BlockSize = gCardInfo.BlockSize; gMMCHSMedia.ReadOnly = (MmioRead32 (GPIO1_BASE + GPIO_DATAIN) & BIT23) == BIT23; gMMCHSMedia.MediaPresent = TRUE; gMMCHSMedia.MediaId++; DEBUG ((EFI_D_INFO, "SD Card Media Change on Handle 0x%08x\n", gImageHandle)); return Status; } #define MAX_MMCHS_TRANSFER_SIZE 0x4000 EFI_STATUS SdReadWrite ( IN EFI_BLOCK_IO_PROTOCOL *This, IN UINTN Lba, OUT VOID *Buffer, IN UINTN BufferSize, IN OPERATION_TYPE OperationType ) { EFI_STATUS Status = EFI_SUCCESS; UINTN RetryCount = 0; UINTN BlockCount; UINTN BytesToBeTranferedThisPass = 0; UINTN BytesRemainingToBeTransfered; EFI_TPL OldTpl; BOOLEAN Update; Update = FALSE; if (gMediaChange) { Update = TRUE; Status = DetectCard (); if (EFI_ERROR (Status)) { // We detected a removal gMMCHSMedia.MediaPresent = FALSE; gMMCHSMedia.LastBlock = 0; gMMCHSMedia.BlockSize = 512; // Should be zero but there is a bug in DiskIo gMMCHSMedia.ReadOnly = FALSE; } gMediaChange = FALSE; } else if (!gMMCHSMedia.MediaPresent) { Status = EFI_NO_MEDIA; goto Done; } if (Update) { DEBUG ((EFI_D_INFO, "SD Card ReinstallProtocolInterface ()\n")); gBS->ReinstallProtocolInterface ( gImageHandle, &gEfiBlockIoProtocolGuid, &gBlockIo, &gBlockIo ); } if (EFI_ERROR (Status)) { goto Done; } if (Buffer == NULL) { Status = EFI_INVALID_PARAMETER; goto Done; } if (Lba > This->Media->LastBlock) { Status = EFI_INVALID_PARAMETER; goto Done; } if ((BufferSize % This->Media->BlockSize) != 0) { Status = EFI_BAD_BUFFER_SIZE; goto Done; } //Check if the data lines are not in use. while ((RetryCount++ < MAX_RETRY_COUNT) && ((MmioRead32 (MMCHS_PSTATE) & DATI_MASK) != DATI_ALLOWED)); if (RetryCount == MAX_RETRY_COUNT) { Status = EFI_TIMEOUT; goto Done; } OldTpl = gBS->RaiseTPL (TPL_NOTIFY); BytesRemainingToBeTransfered = BufferSize; while (BytesRemainingToBeTransfered > 0) { if (gMediaChange) { Status = EFI_NO_MEDIA; DEBUG ((EFI_D_INFO, "SdReadWrite() EFI_NO_MEDIA due to gMediaChange\n")); goto DoneRestoreTPL; } // Turn OFF DMA path until it is debugged // BytesToBeTranferedThisPass = (BytesToBeTranferedThisPass >= MAX_MMCHS_TRANSFER_SIZE) ? MAX_MMCHS_TRANSFER_SIZE : BytesRemainingToBeTransfered; BytesToBeTranferedThisPass = This->Media->BlockSize; BlockCount = BytesToBeTranferedThisPass/This->Media->BlockSize; if (BlockCount > 1) { Status = DmaBlocks (This, Lba, Buffer, BlockCount, OperationType); } else { //Transfer a block worth of data. Status = TransferBlock (This, Lba, Buffer, OperationType); } if (EFI_ERROR(Status)) { DEBUG ((EFI_D_ERROR, "TransferBlockData fails. %x\n", Status)); goto DoneRestoreTPL; } BytesRemainingToBeTransfered -= BytesToBeTranferedThisPass; Lba += BlockCount; Buffer = (UINT8 *)Buffer + This->Media->BlockSize; } DoneRestoreTPL: gBS->RestoreTPL (OldTpl); Done: return Status; } /** Reset the Block Device. @param This Indicates a pointer to the calling context. @param ExtendedVerification Driver may perform diagnostics on reset. @retval EFI_SUCCESS The device was reset. @retval EFI_DEVICE_ERROR The device is not functioning properly and could not be reset. **/ EFI_STATUS EFIAPI MMCHSReset ( IN EFI_BLOCK_IO_PROTOCOL *This, IN BOOLEAN ExtendedVerification ) { return EFI_SUCCESS; } /** Read BufferSize bytes from Lba into Buffer. @param This Indicates a pointer to the calling context. @param MediaId Id of the media, changes every time the media is replaced. @param Lba The starting Logical Block Address to read from @param BufferSize Size of Buffer, must be a multiple of device block size. @param Buffer A pointer to the destination buffer for the data. The caller is responsible for either having implicit or explicit ownership of the buffer. @retval EFI_SUCCESS The data was read correctly from the device. @retval EFI_DEVICE_ERROR The device reported an error while performing the read. @retval EFI_NO_MEDIA There is no media in the device. @retval EFI_MEDIA_CHANGED The MediaId does not matched the current device. @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device. @retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid, or the buffer is not on proper alignment. EFI_STATUS **/ EFI_STATUS EFIAPI MMCHSReadBlocks ( IN EFI_BLOCK_IO_PROTOCOL *This, IN UINT32 MediaId, IN EFI_LBA Lba, IN UINTN BufferSize, OUT VOID *Buffer ) { EFI_STATUS Status; //Perform Read operation. Status = SdReadWrite (This, (UINTN)Lba, Buffer, BufferSize, READ); return Status; } /** Write BufferSize bytes from Lba into Buffer. @param This Indicates a pointer to the calling context. @param MediaId The media ID that the write request is for. @param Lba The starting logical block address to be written. The caller is responsible for writing to only legitimate locations. @param BufferSize Size of Buffer, must be a multiple of device block size. @param Buffer A pointer to the source buffer for the data. @retval EFI_SUCCESS The data was written correctly to the device. @retval EFI_WRITE_PROTECTED The device can not be written to. @retval EFI_DEVICE_ERROR The device reported an error while performing the write. @retval EFI_NO_MEDIA There is no media in the device. @retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device. @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device. @retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid, or the buffer is not on proper alignment. **/ EFI_STATUS EFIAPI MMCHSWriteBlocks ( IN EFI_BLOCK_IO_PROTOCOL *This, IN UINT32 MediaId, IN EFI_LBA Lba, IN UINTN BufferSize, IN VOID *Buffer ) { EFI_STATUS Status; //Perform write operation. Status = SdReadWrite (This, (UINTN)Lba, Buffer, BufferSize, WRITE); return Status; } /** Flush the Block Device. @param This Indicates a pointer to the calling context. @retval EFI_SUCCESS All outstanding data was written to the device @retval EFI_DEVICE_ERROR The device reported an error while writting back the data @retval EFI_NO_MEDIA There is no media in the device. **/ EFI_STATUS EFIAPI MMCHSFlushBlocks ( IN EFI_BLOCK_IO_PROTOCOL *This ) { return EFI_SUCCESS; } EFI_BLOCK_IO_PROTOCOL gBlockIo = { EFI_BLOCK_IO_INTERFACE_REVISION, // Revision &gMMCHSMedia, // *Media MMCHSReset, // Reset MMCHSReadBlocks, // ReadBlocks MMCHSWriteBlocks, // WriteBlocks MMCHSFlushBlocks // FlushBlocks }; /** Timer callback to convert card present hardware into a boolean that indicates a media change event has happened. If you just check the GPIO you could see card 1 and then check again after card 1 was removed and card 2 was inserted and you would still see media present. Thus you need the timer tick to catch the toggle event. @param Event Event whose notification function is being invoked. @param Context The pointer to the notification function's context, which is implementation-dependent. Not used. **/ VOID EFIAPI TimerCallback ( IN EFI_EVENT Event, IN VOID *Context ) { BOOLEAN Present; Present = CardPresent (); if (gMMCHSMedia.MediaPresent) { if (!Present && !gMediaChange) { gMediaChange = TRUE; } } else { if (Present && !gMediaChange) { gMediaChange = TRUE; } } } EFI_STATUS EFIAPI MMCHSInitialize ( IN EFI_HANDLE ImageHandle, IN EFI_SYSTEM_TABLE *SystemTable ) { EFI_STATUS Status; Status = gBS->LocateProtocol (&gEmbeddedExternalDeviceProtocolGuid, NULL, (VOID **)&gTPS65950); ASSERT_EFI_ERROR(Status); ZeroMem (&gCardInfo, sizeof (CARD_INFO)); Status = gBS->CreateEvent (EVT_TIMER | EVT_NOTIFY_SIGNAL, TPL_CALLBACK, TimerCallback, NULL, &gTimerEvent); ASSERT_EFI_ERROR (Status); Status = gBS->SetTimer (gTimerEvent, TimerPeriodic, FixedPcdGet32 (PcdMmchsTimerFreq100NanoSeconds)); ASSERT_EFI_ERROR (Status); //Publish BlockIO. Status = gBS->InstallMultipleProtocolInterfaces ( &ImageHandle, &gEfiBlockIoProtocolGuid, &gBlockIo, &gEfiDevicePathProtocolGuid, &gMmcHsDevicePath, NULL ); return Status; }