X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=Omap35xxPkg%2FMMCHSDxe%2FMMCHS.c;h=5c8e1bd746922eba3a36528d61a55e44e49999c8;hp=54e24d98252c7c5b0105ab31bca96e9438d6fdb1;hb=4211614d80014cf4d97a7af77d8cde4da4618842;hpb=9f6b977f6619950438ac3b765904b7a3ff454baa
diff --git a/Omap35xxPkg/MMCHSDxe/MMCHS.c b/Omap35xxPkg/MMCHSDxe/MMCHS.c
index 54e24d9825..5c8e1bd746 100644
--- a/Omap35xxPkg/MMCHSDxe/MMCHS.c
+++ b/Omap35xxPkg/MMCHSDxe/MMCHS.c
@@ -1,1345 +1,1498 @@
-/** @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;
-
-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));
-
+/** @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.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.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;
-
+
+
+ //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.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;
- }
-
- DisableDmaChannel (2, DMA4_CSR_BLOCK, DMA4_CSR_ERR);
- Status = DmaUnmap (BufferMap);
-
- 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;
+
+ 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"));
+
+
+
+ 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;
- }
-
- //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;
- }
-
+ return EFI_MEDIA_CHANGED;
+ }
+
+ 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;
-}
-
-
+
+
+**/
+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,
+
+ @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);
-
+
+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,
+
+ @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);
+
+
+**/
+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
-};
-
-
+
+
+**/
+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
+
+ 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;
-}
+
+
+**/
+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;
+}