Omap35xxPkg/Library/RealTimeClockLib: Add RTC Support
Omap35xxPkg/MmcHostDxe: Implement MmcHost protocol for Omap35xx BeagleBoardPkg: Use Omap35xx RTC and MmcHost drivers git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12161 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
oliviermartin
667
Omap35xxPkg/MmcHostDxe/MmcHostDxe.c
Executable file
667
Omap35xxPkg/MmcHostDxe/MmcHostDxe.c
Executable file
@@ -0,0 +1,667 @@
|
||||
/** @file
|
||||
*
|
||||
* Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.
|
||||
* Copyright (c) 2011, ARM Limited. All rights reserved.
|
||||
*
|
||||
* This program and the accompanying materials
|
||||
* are licensed and made available under the terms and conditions of the BSD License
|
||||
* which accompanies this distribution. The full text of the license may be found at
|
||||
* http://opensource.org/licenses/bsd-license.php
|
||||
*
|
||||
* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
||||
*
|
||||
**/
|
||||
|
||||
#include "MmcHostDxe.h"
|
||||
|
||||
EMBEDDED_EXTERNAL_DEVICE *gTPS65950;
|
||||
UINT8 MaxDataTransferRate = 0;
|
||||
UINT32 Rca = 0;
|
||||
BOOLEAN BitModeSet = FALSE;
|
||||
|
||||
|
||||
typedef struct {
|
||||
VENDOR_DEVICE_PATH Mmc;
|
||||
EFI_DEVICE_PATH End;
|
||||
} MMCHS_DEVICE_PATH;
|
||||
|
||||
MMCHS_DEVICE_PATH gMMCDevicePath = {
|
||||
{
|
||||
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
|
||||
}
|
||||
};
|
||||
|
||||
BOOLEAN
|
||||
IgnoreCommand (
|
||||
UINT32 Command
|
||||
)
|
||||
{
|
||||
switch(Command) {
|
||||
case MMC_CMD12:
|
||||
return TRUE;
|
||||
case MMC_CMD13:
|
||||
return TRUE;
|
||||
default:
|
||||
return FALSE;
|
||||
}
|
||||
}
|
||||
|
||||
UINT32
|
||||
TranslateCommand (
|
||||
UINT32 Command
|
||||
)
|
||||
{
|
||||
UINT32 Translation;
|
||||
|
||||
switch(Command) {
|
||||
case MMC_CMD2:
|
||||
Translation = CMD2;
|
||||
break;
|
||||
case MMC_CMD3:
|
||||
Translation = CMD3;
|
||||
break;
|
||||
/*case MMC_CMD6:
|
||||
Translation = CMD6;
|
||||
break;*/
|
||||
case MMC_CMD7:
|
||||
Translation = CMD7;
|
||||
break;
|
||||
case MMC_CMD8:
|
||||
Translation = CMD8;
|
||||
break;
|
||||
case MMC_CMD9:
|
||||
Translation = CMD9;
|
||||
break;
|
||||
/*case MMC_CMD12:
|
||||
Translation = CMD12;
|
||||
break;
|
||||
case MMC_CMD13:
|
||||
Translation = CMD13;
|
||||
break;*/
|
||||
case MMC_CMD16:
|
||||
Translation = CMD16;
|
||||
break;
|
||||
case MMC_CMD17:
|
||||
Translation = 0x113A0014;//CMD17;
|
||||
break;
|
||||
case MMC_CMD24:
|
||||
Translation = CMD24 | 4;
|
||||
break;
|
||||
case MMC_CMD55:
|
||||
Translation = CMD55;
|
||||
break;
|
||||
case MMC_ACMD41:
|
||||
Translation = ACMD41;
|
||||
break;
|
||||
default:
|
||||
Translation = Command;
|
||||
}
|
||||
|
||||
return Translation;
|
||||
}
|
||||
|
||||
VOID
|
||||
CalculateCardCLKD (
|
||||
UINTN *ClockFrequencySelect
|
||||
)
|
||||
{
|
||||
DEBUG((EFI_D_ERROR, "CalculateCardCLKD()\n"));
|
||||
UINTN TransferRateValue = 0;
|
||||
UINTN TimeValue = 0 ;
|
||||
UINTN Frequency = 0;
|
||||
|
||||
// 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) { // 2
|
||||
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) { // 6
|
||||
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
|
||||
UpdateMMCHSClkFrequency (
|
||||
UINTN NewCLKD
|
||||
)
|
||||
{
|
||||
DEBUG((EFI_D_ERROR, "UpdateMMCHSClkFrequency()\n"));
|
||||
//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
|
||||
InitializeMMCHS (
|
||||
VOID
|
||||
)
|
||||
{
|
||||
DEBUG((EFI_D_ERROR, "InitializeMMCHS()\n"));
|
||||
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;
|
||||
}
|
||||
|
||||
BOOLEAN
|
||||
MMCIsCardPresent (
|
||||
VOID
|
||||
)
|
||||
{
|
||||
//DEBUG((EFI_D_ERROR, "MMCIsCardPresent()\n"));
|
||||
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;
|
||||
}
|
||||
|
||||
return !(Data & CARD_DETECT_BIT);
|
||||
}
|
||||
|
||||
BOOLEAN
|
||||
MMCIsReadOnly (
|
||||
VOID
|
||||
)
|
||||
{
|
||||
/* Note:
|
||||
* On our BeagleBoard the SD card WP pin is always read as TRUE.
|
||||
* Probably something wrong with GPIO configuration.
|
||||
* BeagleBoard-xM uses microSD cards so there is no write protect at all.
|
||||
* Hence commenting out SD card WP pin read status.
|
||||
*/
|
||||
//return (MmioRead32 (GPIO1_BASE + GPIO_DATAIN) & BIT23) == BIT23;
|
||||
return 0;
|
||||
|
||||
}
|
||||
|
||||
// TODO
|
||||
EFI_GUID mPL180MciDevicePathGuid = EFI_CALLER_ID_GUID;
|
||||
|
||||
EFI_STATUS
|
||||
MMCBuildDevicePath (
|
||||
IN EFI_DEVICE_PATH_PROTOCOL **DevicePath
|
||||
)
|
||||
{
|
||||
EFI_DEVICE_PATH_PROTOCOL *NewDevicePathNode;
|
||||
|
||||
NewDevicePathNode = CreateDeviceNode(HARDWARE_DEVICE_PATH,HW_VENDOR_DP,sizeof(VENDOR_DEVICE_PATH));
|
||||
CopyGuid(&((VENDOR_DEVICE_PATH*)NewDevicePathNode)->Guid,&mPL180MciDevicePathGuid);
|
||||
*DevicePath = NewDevicePathNode;
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
EFI_STATUS
|
||||
MMCSendCommand (
|
||||
IN MMC_CMD MmcCmd,
|
||||
IN UINT32 Argument
|
||||
)
|
||||
{
|
||||
if (IgnoreCommand(MmcCmd))
|
||||
return EFI_SUCCESS;
|
||||
|
||||
MmcCmd = TranslateCommand(MmcCmd);
|
||||
|
||||
//DEBUG((EFI_D_ERROR, "MMCSendCommand(%d)\n", MmcCmd));
|
||||
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, Argument);
|
||||
|
||||
//TODO: fix this
|
||||
//Enable interrupt enable events to occur
|
||||
//MmioWrite32 (MMCHS_IE, CmdInterruptEnableVal);
|
||||
|
||||
//Send a command
|
||||
MmioWrite32 (MMCHS_CMD, MmcCmd);
|
||||
|
||||
//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: 0x%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) {
|
||||
DEBUG((EFI_D_ERROR, "MMCSendCommand: Timeout\n"));
|
||||
return EFI_TIMEOUT;
|
||||
}
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
EFI_STATUS
|
||||
MMCNotifyState (
|
||||
IN MMC_STATE State
|
||||
)
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
UINTN freqSel;
|
||||
switch(State) {
|
||||
case MmcInvalidState:
|
||||
ASSERT(0);
|
||||
break;
|
||||
case MmcHwInitializationState:
|
||||
BitModeSet = FALSE;
|
||||
|
||||
DEBUG((EFI_D_ERROR, "MMCHwInitializationState()\n"));
|
||||
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);
|
||||
|
||||
//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);
|
||||
break;
|
||||
case MmcIdleState:
|
||||
break;
|
||||
case MmcReadyState:
|
||||
break;
|
||||
case MmcIdentificationState:
|
||||
break;
|
||||
case MmcStandByState:
|
||||
CalculateCardCLKD(&freqSel);
|
||||
UpdateMMCHSClkFrequency(freqSel);
|
||||
break;
|
||||
case MmcTransferState:
|
||||
if (!BitModeSet) {
|
||||
Status = MMCSendCommand (CMD55, Rca << 16);
|
||||
if (!EFI_ERROR (Status)) {
|
||||
// set device into 4-bit data bus mode
|
||||
Status = MMCSendCommand (ACMD6, 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"));
|
||||
BitModeSet = TRUE;
|
||||
}
|
||||
}
|
||||
}
|
||||
break;
|
||||
case MmcSendingDataState:
|
||||
break;
|
||||
case MmcReceiveDataState:
|
||||
break;
|
||||
case MmcProgrammingState:
|
||||
break;
|
||||
case MmcDisconnectState:
|
||||
default:
|
||||
ASSERT(0);
|
||||
}
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
EFI_STATUS
|
||||
MMCReceiveResponse (
|
||||
IN MMC_RESPONSE_TYPE Type,
|
||||
IN UINT32* Buffer
|
||||
)
|
||||
{
|
||||
//DEBUG((EFI_D_ERROR, "MMCReceiveResponse()\n"));
|
||||
if (Buffer == NULL) {
|
||||
DEBUG((EFI_D_ERROR, "Buffer was NULL\n"));
|
||||
return EFI_INVALID_PARAMETER;
|
||||
}
|
||||
|
||||
if (Type == MMC_RESPONSE_TYPE_R2) {
|
||||
Buffer[0] = MmioRead32 (MMCHS_RSP10);
|
||||
Buffer[1] = MmioRead32 (MMCHS_RSP32);
|
||||
Buffer[2] = MmioRead32 (MMCHS_RSP54);
|
||||
Buffer[3] = MmioRead32 (MMCHS_RSP76);
|
||||
} else {
|
||||
Buffer[0] = MmioRead32 (MMCHS_RSP10);
|
||||
}
|
||||
|
||||
if (Type == MMC_RESPONSE_TYPE_CSD) {
|
||||
MaxDataTransferRate = Buffer[3] & 0xFF;
|
||||
} else if (Type == MMC_RESPONSE_TYPE_RCA) {
|
||||
Rca = Buffer[0] >> 16;
|
||||
}
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
EFI_STATUS
|
||||
MMCReadBlockData (
|
||||
IN EFI_LBA Lba,
|
||||
IN UINTN Length,
|
||||
IN UINT32* Buffer
|
||||
)
|
||||
{
|
||||
//DEBUG((EFI_D_ERROR, "MMCReadBlockData(LBA: 0x%x, ", Lba));
|
||||
//DEBUG((EFI_D_ERROR, "Length: 0x%x, ", Length));
|
||||
//DEBUG((EFI_D_ERROR, "Buffer: 0x%x)\n", Buffer));
|
||||
UINTN MmcStatus;
|
||||
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);
|
||||
|
||||
for (Count = 0; Count < Length / 4; Count++) {
|
||||
*Buffer++ = MmioRead32(MMCHS_DATA);
|
||||
}
|
||||
break;
|
||||
}
|
||||
RetryCount++;
|
||||
}
|
||||
|
||||
if (RetryCount == MAX_RETRY_COUNT) {
|
||||
return EFI_TIMEOUT;
|
||||
}
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
EFI_STATUS
|
||||
MMCWriteBlockData (
|
||||
IN EFI_LBA Lba,
|
||||
IN UINTN Length,
|
||||
IN UINT32* Buffer
|
||||
)
|
||||
{
|
||||
UINTN MmcStatus;
|
||||
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 < Length / 4; Count++) {
|
||||
MmioWrite32 (MMCHS_DATA, *Buffer++);
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
RetryCount++;
|
||||
}
|
||||
|
||||
if (RetryCount == MAX_RETRY_COUNT) {
|
||||
return EFI_TIMEOUT;
|
||||
}
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
EFI_MMC_HOST_PROTOCOL gMMCHost = {
|
||||
MMCIsCardPresent,
|
||||
MMCIsReadOnly,
|
||||
MMCBuildDevicePath,
|
||||
MMCNotifyState,
|
||||
MMCSendCommand,
|
||||
MMCReceiveResponse,
|
||||
MMCReadBlockData,
|
||||
MMCWriteBlockData
|
||||
};
|
||||
|
||||
EFI_STATUS
|
||||
MMCInitialize (
|
||||
IN EFI_HANDLE ImageHandle,
|
||||
IN EFI_SYSTEM_TABLE *SystemTable
|
||||
)
|
||||
{
|
||||
DEBUG((EFI_D_ERROR, "MMCInitialize()\n"));
|
||||
EFI_STATUS Status;
|
||||
EFI_HANDLE Handle = NULL;
|
||||
|
||||
Status = gBS->LocateProtocol (&gEmbeddedExternalDeviceProtocolGuid, NULL, (VOID **)&gTPS65950);
|
||||
ASSERT_EFI_ERROR(Status);
|
||||
|
||||
Status = gBS->InstallMultipleProtocolInterfaces (
|
||||
&Handle,
|
||||
&gEfiMmcHostProtocolGuid, &gMMCHost,
|
||||
NULL
|
||||
);
|
||||
ASSERT_EFI_ERROR (Status);
|
||||
|
||||
return Status;
|
||||
}
|
||||
Reference in New Issue
Block a user