diff options
Diffstat (limited to 'Vlv2TbltDevicePkg/Library/I2CLibDxe/I2CLib.c')
| -rw-r--r-- | Vlv2TbltDevicePkg/Library/I2CLibDxe/I2CLib.c | 735 |
1 files changed, 0 insertions, 735 deletions
diff --git a/Vlv2TbltDevicePkg/Library/I2CLibDxe/I2CLib.c b/Vlv2TbltDevicePkg/Library/I2CLibDxe/I2CLib.c deleted file mode 100644 index 104c2de..0000000 --- a/Vlv2TbltDevicePkg/Library/I2CLibDxe/I2CLib.c +++ /dev/null @@ -1,735 +0,0 @@ -/** @file
- Functions for accessing I2C registers.
-
- Copyright (c) 2004 - 2015, Intel Corporation. All rights reserved.<BR>
-
- SPDX-License-Identifier: BSD-2-Clause-Patent
-
---*/
-
-#include <Library/DebugLib.h>
-#include <Library/TimerLib.h>
-#include <PchRegs/PchRegsPcu.h>
-#include <PchRegs.h>
-#include <PlatformBaseAddresses.h>
-#include <PchRegs/PchRegsLpss.h>
-#include <Library/I2CLib.h>
-#include <Protocol/GlobalNvsArea.h>
-#include <Library/UefiBootServicesTableLib.h>
-#include <I2CRegs.h>
-
-#define GLOBAL_NVS_OFFSET(Field) (UINTN)((CHAR8*)&((EFI_GLOBAL_NVS_AREA*)0)->Field - (CHAR8*)0)
-
-#define PCIEX_BASE_ADDRESS 0xE0000000
-#define PCI_EXPRESS_BASE_ADDRESS ((VOID *) (UINTN) PCIEX_BASE_ADDRESS)
-#define MmPciAddress( Segment, Bus, Device, Function, Register ) \
- ((UINTN)PCI_EXPRESS_BASE_ADDRESS + \
- (UINTN)(Bus << 20) + \
- (UINTN)(Device << 15) + \
- (UINTN)(Function << 12) + \
- (UINTN)(Register) \
- )
-#define PCI_D31F0_REG_BASE PCIEX_BASE_ADDRESS + (UINT32) (31 << 15)
-
-typedef struct _LPSS_PCI_DEVICE_INFO {
- UINTN Segment;
- UINTN BusNum;
- UINTN DeviceNum;
- UINTN FunctionNum;
- UINTN Bar0;
- UINTN Bar1;
-} LPSS_PCI_DEVICE_INFO;
-
-LPSS_PCI_DEVICE_INFO mLpssPciDeviceList[] = {
- {0, DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_LPSS_DMAC1, PCI_FUNCTION_NUMBER_PCH_LPSS_DMAC, 0xFE900000, 0xFE908000},
- {0, DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_LPSS_I2C, PCI_FUNCTION_NUMBER_PCH_LPSS_I2C0, 0xFE910000, 0xFE918000},
- {0, DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_LPSS_I2C, PCI_FUNCTION_NUMBER_PCH_LPSS_I2C1, 0xFE920000, 0xFE928000},
- {0, DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_LPSS_I2C, PCI_FUNCTION_NUMBER_PCH_LPSS_I2C2, 0xFE930000, 0xFE938000},
- {0, DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_LPSS_I2C, PCI_FUNCTION_NUMBER_PCH_LPSS_I2C3, 0xFE940000, 0xFE948000},
- {0, DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_LPSS_I2C, PCI_FUNCTION_NUMBER_PCH_LPSS_I2C4, 0xFE950000, 0xFE958000},
- {0, DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_LPSS_I2C, PCI_FUNCTION_NUMBER_PCH_LPSS_I2C5, 0xFE960000, 0xFE968000},
- {0, DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_LPSS_I2C, PCI_FUNCTION_NUMBER_PCH_LPSS_I2C6, 0xFE970000, 0xFE978000}
-};
-
-#define LPSS_PCI_DEVICE_NUMBER sizeof(mLpssPciDeviceList)/sizeof(LPSS_PCI_DEVICE_INFO)
-
-STATIC UINTN mI2CBaseAddress = 0;
-STATIC UINT16 mI2CSlaveAddress = 0;
-
-UINT16 mI2cMode=B_IC_RESTART_EN | B_IC_SLAVE_DISABLE | B_MASTER_MODE ;
-
-UINTN mI2cNvsBaseAddress[] = {
- GLOBAL_NVS_OFFSET(LDMA2Addr),
- GLOBAL_NVS_OFFSET(I2C1Addr),
- GLOBAL_NVS_OFFSET(I2C2Addr),
- GLOBAL_NVS_OFFSET(I2C3Addr),
- GLOBAL_NVS_OFFSET(I2C4Addr),
- GLOBAL_NVS_OFFSET(I2C5Addr),
- GLOBAL_NVS_OFFSET(I2C6Addr),
- GLOBAL_NVS_OFFSET(I2C7Addr)
- };
-
-/**
- This function get I2Cx controller base address (BAR0).
-
- @param I2cControllerIndex Bus Number of I2C controller.
-
- @return I2C BAR.
-**/
-UINTN
-GetI2cBarAddr(
- IN UINT8 I2cControllerIndex
- )
-{
- EFI_STATUS Status;
- EFI_GLOBAL_NVS_AREA_PROTOCOL *GlobalNvsArea;
- UINTN AcpiBaseAddr;
- UINTN PciMmBase=0;
-
- ASSERT(gBS!=NULL);
-
- Status = gBS->LocateProtocol (
- &gEfiGlobalNvsAreaProtocolGuid,
- NULL,
- &GlobalNvsArea
- );
-
- //
- // PCI mode from PEI ( Global NVS is not ready).
- //
- if (EFI_ERROR(Status)) {
- DEBUG ((EFI_D_INFO, "GetI2cBarAddr() gEfiGlobalNvsAreaProtocolGuid:%r\n", Status));
- //
- // Global NVS is not ready.
- //
- return 0;
- }
-
- AcpiBaseAddr = *(UINTN*)((CHAR8*)GlobalNvsArea->Area + mI2cNvsBaseAddress[I2cControllerIndex + 1]);
-
- //
- //PCI mode from DXE (global NVS protocal) to LPSS OnReadytoBoot(swith to ACPI).
- //
- if(AcpiBaseAddr==0) {
- PciMmBase = MmPciAddress (
- mLpssPciDeviceList[I2cControllerIndex + 1].Segment,
- mLpssPciDeviceList[I2cControllerIndex + 1].BusNum,
- mLpssPciDeviceList[I2cControllerIndex + 1].DeviceNum,
- mLpssPciDeviceList[I2cControllerIndex + 1].FunctionNum,
- 0
- );
- DEBUG((EFI_D_ERROR, "\nGetI2cBarAddr() I2C Device %x %x %x PciMmBase:%x\n", \
- mLpssPciDeviceList[I2cControllerIndex + 1].BusNum, \
- mLpssPciDeviceList[I2cControllerIndex + 1].DeviceNum, \
- mLpssPciDeviceList[I2cControllerIndex + 1].FunctionNum, PciMmBase));
-
- if (MmioRead32 (PciMmBase) != 0xFFFFFFFF) {
- if((MmioRead32 (PciMmBase+R_PCH_LPSS_I2C_STSCMD)& B_PCH_LPSS_I2C_STSCMD_MSE)) {
- //
- // Get the address allocted.
- //
- mLpssPciDeviceList[I2cControllerIndex + 1].Bar0=MmioRead32 (PciMmBase+R_PCH_LPSS_I2C_BAR);
- mLpssPciDeviceList[I2cControllerIndex + 1].Bar1=MmioRead32 (PciMmBase+R_PCH_LPSS_I2C_BAR1);
- }
- }
- AcpiBaseAddr =mLpssPciDeviceList[I2cControllerIndex+1].Bar0;
- }
-
- //
- // ACPI mode from BDS: LPSS OnReadytoBoot
- //
- else {
- DEBUG ((EFI_D_INFO, "GetI2cBarAddr() NVS Varialable is updated by this LIB or LPSS \n"));
- }
-
- DEBUG ((EFI_D_INFO, "GetI2cBarAddr() I2cControllerIndex+1 0x%x AcpiBaseAddr:0x%x \n", (I2cControllerIndex + 1), AcpiBaseAddr));
- return AcpiBaseAddr;
-}
-
-
-/**
- This function enables I2C controllers.
-
- @param I2cControllerIndex Bus Number of I2C controllers.
-
- @return Result of the I2C initialization.
-**/
-EFI_STATUS
-ProgramPciLpssI2C (
- IN UINT8 I2cControllerIndex
- )
-{
- UINT32 PmcBase;
- UINTN PciMmBase=0;
- EFI_STATUS Status;
- EFI_GLOBAL_NVS_AREA_PROTOCOL *GlobalNvsArea;
-
- UINT32 PmcFunctionDsiable[]= {
- B_PCH_PMC_FUNC_DIS_LPSS2_FUNC1,
- B_PCH_PMC_FUNC_DIS_LPSS2_FUNC2,
- B_PCH_PMC_FUNC_DIS_LPSS2_FUNC3,
- B_PCH_PMC_FUNC_DIS_LPSS2_FUNC4,
- B_PCH_PMC_FUNC_DIS_LPSS2_FUNC5,
- B_PCH_PMC_FUNC_DIS_LPSS2_FUNC6,
- B_PCH_PMC_FUNC_DIS_LPSS2_FUNC7
- };
-
- DEBUG ((EFI_D_INFO, "ProgramPciLpssI2C() Start\n"));
-
- //
- // Set the VLV Function Disable Register to ZERO
- //
- PmcBase = MmioRead32 (PCI_D31F0_REG_BASE + R_PCH_LPC_PMC_BASE) & B_PCH_LPC_PMC_BASE_BAR;
- if(MmioRead32(PmcBase+R_PCH_PMC_FUNC_DIS)&PmcFunctionDsiable[I2cControllerIndex]) {
- DEBUG ((EFI_D_INFO, "ProgramPciLpssI2C() End:I2C[%x] is disabled\n",I2cControllerIndex));
- return EFI_NOT_READY;
- }
-
- DEBUG ((EFI_D_INFO, "ProgramPciLpssI2C()------------I2cControllerIndex=%x,PMC=%x\n",I2cControllerIndex,MmioRead32(PmcBase+R_PCH_PMC_FUNC_DIS)));
-
- {
- PciMmBase = MmPciAddress (
- mLpssPciDeviceList[I2cControllerIndex+1].Segment,
- mLpssPciDeviceList[I2cControllerIndex+1].BusNum,
- mLpssPciDeviceList[I2cControllerIndex+1].DeviceNum,
- mLpssPciDeviceList[I2cControllerIndex+1].FunctionNum,
- 0
- );
-
- DEBUG((EFI_D_ERROR, "Program Pci Lpss I2C Device %x %x %x PciMmBase:%x\n", \
- mLpssPciDeviceList[I2cControllerIndex+1].BusNum, \
- mLpssPciDeviceList[I2cControllerIndex+1].DeviceNum, \
- mLpssPciDeviceList[I2cControllerIndex+1].FunctionNum, PciMmBase));
-
- if (MmioRead32 (PciMmBase) != 0xFFFFFFFF) {
- if((MmioRead32 (PciMmBase+R_PCH_LPSS_I2C_STSCMD)& B_PCH_LPSS_I2C_STSCMD_MSE)) {
- //
- // Get the address allocted.
- //
- mLpssPciDeviceList[I2cControllerIndex+1].Bar0=MmioRead32 (PciMmBase+R_PCH_LPSS_I2C_BAR);
- mLpssPciDeviceList[I2cControllerIndex+1].Bar1=MmioRead32 (PciMmBase+R_PCH_LPSS_I2C_BAR1);
- DEBUG((EFI_D_ERROR, "ProgramPciLpssI2C() bar0:0x%x bar1:0x%x\n",mLpssPciDeviceList[I2cControllerIndex+1].Bar0, mLpssPciDeviceList[I2cControllerIndex+1].Bar1));
- } else {
-
- //
- // Program BAR 0
- //
- ASSERT (((mLpssPciDeviceList[I2cControllerIndex+1].Bar0 & B_PCH_LPSS_I2C_BAR_BA) == mLpssPciDeviceList[I2cControllerIndex+1].Bar0) && (mLpssPciDeviceList[I2cControllerIndex+1].Bar0 != 0));
- MmioWrite32 ((UINTN) (PciMmBase + R_PCH_LPSS_I2C_BAR), (UINT32) (mLpssPciDeviceList[I2cControllerIndex+1].Bar0 & B_PCH_LPSS_I2C_BAR_BA));
-
- //
- // Program BAR 1
- //
- ASSERT (((mLpssPciDeviceList[I2cControllerIndex+1].Bar1 & B_PCH_LPSS_I2C_BAR1_BA) == mLpssPciDeviceList[I2cControllerIndex+1].Bar1) && (mLpssPciDeviceList[I2cControllerIndex+1].Bar1 != 0));
- MmioWrite32 ((UINTN) (PciMmBase + R_PCH_LPSS_I2C_BAR1), (UINT32) (mLpssPciDeviceList[I2cControllerIndex+1].Bar1 & B_PCH_LPSS_I2C_BAR1_BA));
-
- //
- // Bus Master Enable & Memory Space Enable
- //
- MmioOr32 ((UINTN) (PciMmBase + R_PCH_LPSS_I2C_STSCMD), (UINT32) (B_PCH_LPSS_I2C_STSCMD_BME | B_PCH_LPSS_I2C_STSCMD_MSE));
- ASSERT (MmioRead32 (mLpssPciDeviceList[I2cControllerIndex+1].Bar0) != 0xFFFFFFFF);
- }
-
- //
- // Release Resets
- //
- MmioWrite32 (mLpssPciDeviceList[I2cControllerIndex+1].Bar0 + R_PCH_LPIO_I2C_MEM_RESETS,(B_PCH_LPIO_I2C_MEM_RESETS_FUNC | B_PCH_LPIO_I2C_MEM_RESETS_APB));
-
- //
- // Activate Clocks
- //
- MmioWrite32 (mLpssPciDeviceList[I2cControllerIndex+1].Bar0 + R_PCH_LPSS_I2C_MEM_PCP,0x80020003);//No use for A0
-
- DEBUG ((EFI_D_INFO, "ProgramPciLpssI2C() Programmed()\n"));
- }
-
- //
- // BDS: already switched to ACPI mode
- //
- else {
- ASSERT(gBS!=NULL);
- Status = gBS->LocateProtocol (
- &gEfiGlobalNvsAreaProtocolGuid,
- NULL,
- &GlobalNvsArea
- );
- if (EFI_ERROR(Status)) {
- DEBUG ((EFI_D_INFO, "GetI2cBarAddr() gEfiGlobalNvsAreaProtocolGuid:%r\n", Status));
- //
- // gEfiGlobalNvsAreaProtocolGuid is not ready.
- //
- return 0;
- }
- mLpssPciDeviceList[I2cControllerIndex + 1].Bar0 = *(UINTN*)((CHAR8*)GlobalNvsArea->Area + mI2cNvsBaseAddress[I2cControllerIndex + 1]);
- DEBUG ((EFI_D_INFO, "ProgramPciLpssI2C(): is switched to ACPI 0x:%x \n",mLpssPciDeviceList[I2cControllerIndex + 1].Bar0));
- }
- }
-
- DEBUG ((EFI_D_INFO, "ProgramPciLpssI2C() End\n"));
-
- return EFI_SUCCESS;
-}
-
-/**
- Disable I2C Bus.
-
- @param VOID.
-
- @return Result of the I2C disabling.
-**/
-RETURN_STATUS
-I2cDisable (
- VOID
- )
-{
- //
- // 0.1 seconds
- //
- UINT32 NumTries = 10000;
-
- MmioWrite32 ( mI2CBaseAddress + R_IC_ENABLE, 0 );
- while ( 0 != ( MmioRead32 ( mI2CBaseAddress + R_IC_ENABLE_STATUS) & 1)) {
- MicroSecondDelay (10);
- NumTries --;
- if(0 == NumTries) {
- return RETURN_NOT_READY;
- }
- }
-
- return RETURN_SUCCESS;
-}
-
-/**
- Enable I2C Bus.
-
- @param VOID.
-
- @return Result of the I2C disabling.
-**/
-RETURN_STATUS
-I2cEnable (
- VOID
- )
-{
- //
- // 0.1 seconds
- //
- UINT32 NumTries = 10000;
-
- MmioWrite32 (mI2CBaseAddress + R_IC_ENABLE, 1);
-
- while (0 == (MmioRead32 (mI2CBaseAddress + R_IC_ENABLE_STATUS) & 1)) {
- MicroSecondDelay (10);
- NumTries --;
- if(0 == NumTries){
- return RETURN_NOT_READY;
- }
- }
-
- return RETURN_SUCCESS;
-}
-
-/**
- Enable I2C Bus.
-
- @param VOID.
-
- @return Result of the I2C enabling.
-**/
-RETURN_STATUS
-I2cBusFrequencySet (
- IN UINTN BusClockHertz
- )
-{
- DEBUG((EFI_D_INFO,"InputFreq BusClockHertz: %d\r\n",BusClockHertz));
-
- //
- // Set the 100 KHz clock divider according to SV result and I2C spec
- //
- MmioWrite32 ( mI2CBaseAddress + R_IC_SS_SCL_HCNT, (UINT16)0x214 );
- MmioWrite32 ( mI2CBaseAddress + R_IC_SS_SCL_LCNT, (UINT16)0x272 );
-
- //
- // Set the 400 KHz clock divider according to SV result and I2C spec
- //
- MmioWrite32 ( mI2CBaseAddress + R_IC_FS_SCL_HCNT, (UINT16)0x50 );
- MmioWrite32 ( mI2CBaseAddress + R_IC_FS_SCL_LCNT, (UINT16)0xAD );
-
- switch ( BusClockHertz ) {
- case 100 * 1000:
- MmioWrite32 ( mI2CBaseAddress + R_IC_SDA_HOLD, (UINT16)0x40);//100K
- mI2cMode = V_SPEED_STANDARD;
- break;
- case 400 * 1000:
- MmioWrite32 ( mI2CBaseAddress + R_IC_SDA_HOLD, (UINT16)0x32);//400K
- mI2cMode = V_SPEED_FAST;
- break;
- default:
- MmioWrite32 ( mI2CBaseAddress + R_IC_SDA_HOLD, (UINT16)0x09);//3.4M
- mI2cMode = V_SPEED_HIGH;
- }
-
- //
- // Select the frequency counter,
- // Enable restart condition,
- // Enable master FSM, disable slave FSM.
- //
- mI2cMode |= B_IC_RESTART_EN | B_IC_SLAVE_DISABLE | B_MASTER_MODE;
-
- return EFI_SUCCESS;
-}
-
-/**
- Initializes the host controller to execute I2C commands.
-
- @param I2cControllerIndex Index of I2C controller in LPSS device. 0 represents I2C0, which is PCI function 1 of LPSS device.
-
- @return EFI_SUCCESS Opcode initialization on the I2C host controller completed.
- @return EFI_DEVICE_ERROR Device error, operation failed.
-**/
-EFI_STATUS
-I2CInit (
- IN UINT8 I2cControllerIndex,
- IN UINT16 SlaveAddress
- )
-{
- EFI_STATUS Status=RETURN_SUCCESS;
- UINT32 NumTries = 0;
- UINTN GnvsI2cBarAddr=0;
-
- //
- // Verify the parameters
- //
- if ((1023 < SlaveAddress) || (6 < I2cControllerIndex)) {
- Status = RETURN_INVALID_PARAMETER;
- DEBUG((EFI_D_INFO,"I2CInit Exit with RETURN_INVALID_PARAMETER\r\n"));
- return Status;
- }
- MmioWrite32 ( mI2CBaseAddress + R_IC_TAR, (UINT16)SlaveAddress );
- mI2CSlaveAddress = SlaveAddress;
-
- //
- // 1.PEI: program and init ( before pci enumeration).
- // 2.DXE:update address and re-init ( after pci enumeration).
- // 3.BDS:update ACPI address and re-init ( after acpi mode is enabled).
- //
- if(mI2CBaseAddress == mLpssPciDeviceList[I2cControllerIndex + 1].Bar0) {
-
- //
- // I2CInit is already called.
- //
- GnvsI2cBarAddr=GetI2cBarAddr(I2cControllerIndex);
-
- if((GnvsI2cBarAddr == 0)||(GnvsI2cBarAddr == mI2CBaseAddress)) {
- DEBUG((EFI_D_INFO,"I2CInit Exit with mI2CBaseAddress:%x == [%x].Bar0\r\n",mI2CBaseAddress,I2cControllerIndex+1));
- return RETURN_SUCCESS;
- }
- }
-
- Status=ProgramPciLpssI2C(I2cControllerIndex);
- if(Status!=EFI_SUCCESS) {
- return Status;
- }
-
-
- mI2CBaseAddress = (UINT32) mLpssPciDeviceList[I2cControllerIndex + 1].Bar0;
- DEBUG ((EFI_D_ERROR, "mI2CBaseAddress = 0x%x \n",mI2CBaseAddress));
-
- //
- // 1 seconds.
- //
- NumTries = 10000;
- while ((1 == ( MmioRead32 ( mI2CBaseAddress + R_IC_STATUS) & STAT_MST_ACTIVITY ))) {
- MicroSecondDelay(10);
- NumTries --;
- if(0 == NumTries) {
- DEBUG((EFI_D_INFO, "Try timeout\r\n"));
- return RETURN_DEVICE_ERROR;
- }
- }
-
- Status = I2cDisable();
- DEBUG((EFI_D_INFO, "I2cDisable Status = %r\r\n", Status));
- I2cBusFrequencySet(400 * 1000);
-
- MmioWrite32(mI2CBaseAddress + R_IC_INTR_MASK, 0x0);
- if (0x7f < SlaveAddress )
- SlaveAddress = ( SlaveAddress & 0x3ff ) | IC_TAR_10BITADDR_MASTER;
- MmioWrite32 ( mI2CBaseAddress + R_IC_TAR, (UINT16)SlaveAddress );
- MmioWrite32 ( mI2CBaseAddress + R_IC_RX_TL, 0);
- MmioWrite32 ( mI2CBaseAddress + R_IC_TX_TL, 0 );
- MmioWrite32 ( mI2CBaseAddress + R_IC_CON, mI2cMode);
- Status = I2cEnable();
-
- DEBUG((EFI_D_INFO, "I2cEnable Status = %r\r\n", Status));
- MmioRead32 ( mI2CBaseAddress + R_IC_CLR_TX_ABRT );
-
- return EFI_SUCCESS;
-}
-
-/**
- Reads a Byte from I2C Device.
-
- @param I2cControllerIndex I2C Bus no to which the I2C device has been connected
- @param SlaveAddress Device Address from which the byte value has to be read
- @param Offset Offset from which the data has to be read
- @param *Byte Address to which the value read has to be stored
- @param Start Whether a RESTART is issued before the byte is sent or received
- @param End Whether STOP is generated after a data byte is sent or received
-
- @return EFI_SUCCESS IF the byte value has been successfully read
- @return EFI_DEVICE_ERROR Operation Failed, Device Error
-**/
-EFI_STATUS
-ByteReadI2CBasic(
- IN UINT8 I2cControllerIndex,
- IN UINT8 SlaveAddress,
- IN UINTN ReadBytes,
- OUT UINT8 *ReadBuffer,
- IN UINT8 Start,
- IN UINT8 End
- )
-{
-
- EFI_STATUS Status;
- UINT32 I2cStatus;
- UINT16 ReceiveData;
- UINT8 *ReceiveDataEnd;
- UINT8 *ReceiveRequest;
- UINT16 RawIntrStat;
- UINT32 Count=0;
-
- Status = EFI_SUCCESS;
-
- ReceiveDataEnd = &ReadBuffer [ReadBytes];
- if( ReadBytes ) {
-
- ReceiveRequest = ReadBuffer;
- DEBUG((EFI_D_INFO,"Read: ---------------%d bytes to RX\r\n",ReceiveDataEnd - ReceiveRequest));
-
- while ((ReceiveDataEnd > ReceiveRequest) || (ReceiveDataEnd > ReadBuffer)) {
-
- //
- // Check for NACK
- //
- RawIntrStat = (UINT16)MmioRead32 (mI2CBaseAddress + R_IC_RawIntrStat);
- if ( 0 != ( RawIntrStat & I2C_INTR_TX_ABRT )) {
- MmioRead32 ( mI2CBaseAddress + R_IC_CLR_TX_ABRT );
- Status = RETURN_DEVICE_ERROR;
- DEBUG((EFI_D_INFO,"TX ABRT ,%d bytes hasn't been transferred\r\n",ReceiveDataEnd - ReceiveRequest));
- break;
- }
-
- //
- // Determine if another byte was received
- //
- I2cStatus = (UINT16)MmioRead32 (mI2CBaseAddress + R_IC_STATUS);
- if (0 != ( I2cStatus & STAT_RFNE )) {
- ReceiveData = (UINT16)MmioRead32 ( mI2CBaseAddress + R_IC_DATA_CMD );
- *ReadBuffer++ = (UINT8)ReceiveData;
- DEBUG((EFI_D_INFO,"MmioRead32 ,1 byte 0x:%x is received\r\n",ReceiveData));
- }
-
- if(ReceiveDataEnd == ReceiveRequest) {
- MicroSecondDelay ( FIFO_WRITE_DELAY );
- DEBUG((EFI_D_INFO,"ReceiveDataEnd==ReceiveRequest------------%x\r\n",I2cStatus & STAT_RFNE));
- Count++;
- if(Count<1024) {
- //
- // To avoid sys hung without ul-pmc device on RVP,
- // waiting the last request to get data and make (ReceiveDataEnd > ReadBuffer) =TRUE.
- //
- continue;
- } else {
- break;
- }
- }
-
- //
- // Wait until a read request will fit.
- //
- if (0 == (I2cStatus & STAT_TFNF)) {
- DEBUG((EFI_D_INFO,"Wait until a read request will fit\r\n"));
- MicroSecondDelay (10);
- continue;
- }
-
- //
- // Issue the next read request.
- //
- if(End && Start) {
- MmioWrite32 ( mI2CBaseAddress + R_IC_DATA_CMD, B_READ_CMD|B_CMD_RESTART|B_CMD_STOP);
- } else if (!End && Start) {
- MmioWrite32 ( mI2CBaseAddress + R_IC_DATA_CMD, B_READ_CMD|B_CMD_RESTART);
- } else if (End && !Start) {
- MmioWrite32 ( mI2CBaseAddress + R_IC_DATA_CMD, B_READ_CMD|B_CMD_STOP);
- } else if (!End && !Start) {
- MmioWrite32 ( mI2CBaseAddress + R_IC_DATA_CMD, B_READ_CMD);
- }
- MicroSecondDelay (FIFO_WRITE_DELAY);
-
- ReceiveRequest += 1;
- }
- }
-
- return Status;
-}
-
-/**
- Writes a Byte to I2C Device.
-
- @param I2cControllerIndex I2C Bus no to which the I2C device has been connected
- @param SlaveAddress Device Address from which the byte value has to be written
- @param Offset Offset from which the data has to be read
- @param *Byte Address to which the value written is stored
- @param Start Whether a RESTART is issued before the byte is sent or received
- @param End Whether STOP is generated after a data byte is sent or received
-
- @return EFI_SUCCESS IF the byte value has been successfully written
- @return EFI_DEVICE_ERROR Operation Failed, Device Error
-**/
-EFI_STATUS ByteWriteI2CBasic(
- IN UINT8 I2cControllerIndex,
- IN UINT8 SlaveAddress,
- IN UINTN WriteBytes,
- IN UINT8 *WriteBuffer,
- IN UINT8 Start,
- IN UINT8 End
- )
-{
-
- EFI_STATUS Status;
- UINT32 I2cStatus;
- UINT8 *TransmitEnd;
- UINT16 RawIntrStat;
- UINT32 Count=0;
-
- Status = EFI_SUCCESS;
-
- Status=I2CInit(I2cControllerIndex, SlaveAddress);
- if(Status!=EFI_SUCCESS)
- return Status;
-
- TransmitEnd = &WriteBuffer[WriteBytes];
- if( WriteBytes ) {
- DEBUG((EFI_D_INFO,"Write: --------------%d bytes to TX\r\n",TransmitEnd - WriteBuffer));
- while (TransmitEnd > WriteBuffer) {
- I2cStatus = MmioRead32 (mI2CBaseAddress + R_IC_STATUS);
- RawIntrStat = (UINT16)MmioRead32 (mI2CBaseAddress + R_IC_RawIntrStat);
- if (0 != ( RawIntrStat & I2C_INTR_TX_ABRT)) {
- MmioRead32 ( mI2CBaseAddress + R_IC_CLR_TX_ABRT);
- Status = RETURN_DEVICE_ERROR;
- DEBUG((EFI_D_ERROR,"TX ABRT TransmitEnd:0x%x WriteBuffer:0x%x\r\n", TransmitEnd, WriteBuffer));
- break;
- }
- if (0 == (I2cStatus & STAT_TFNF)) {
- //
- // If TX not full , will send cmd or continue to wait
- //
- MicroSecondDelay (FIFO_WRITE_DELAY);
- continue;
- }
-
- if(End && Start) {
- MmioWrite32 (mI2CBaseAddress + R_IC_DATA_CMD, (*WriteBuffer++)|B_CMD_RESTART|B_CMD_STOP);
- } else if (!End && Start) {
- MmioWrite32 (mI2CBaseAddress + R_IC_DATA_CMD, (*WriteBuffer++)|B_CMD_RESTART);
- } else if (End && !Start) {
- MmioWrite32 (mI2CBaseAddress + R_IC_DATA_CMD, (*WriteBuffer++)|B_CMD_STOP);
- } else if (!End && !Start ) {
- MmioWrite32 (mI2CBaseAddress + R_IC_DATA_CMD, (*WriteBuffer++));
- }
-
- //
- // Add a small delay to work around some odd behavior being seen. Without this delay bytes get dropped.
- //
- MicroSecondDelay ( FIFO_WRITE_DELAY );//wait after send cmd
-
- //
- // Time out
- //
- while(1) {
- RawIntrStat = MmioRead16 ( mI2CBaseAddress + R_IC_RawIntrStat );
- if (0 != ( RawIntrStat & I2C_INTR_TX_ABRT)) {
- MmioRead16 (mI2CBaseAddress + R_IC_CLR_TX_ABRT);
- Status = RETURN_DEVICE_ERROR;
- DEBUG((EFI_D_ERROR,"TX ABRT TransmitEnd:0x%x WriteBuffer:0x%x\r\n", TransmitEnd, WriteBuffer));
- }
- if(0 == MmioRead16(mI2CBaseAddress + R_IC_TXFLR)) break;
-
- MicroSecondDelay (FIFO_WRITE_DELAY);
- Count++;
- if(Count<1024) {
- //
- // to avoid sys hung without ul-pmc device on RVP.
- // Waiting the last request to get data and make (ReceiveDataEnd > ReadBuffer) =TRUE.
- //
- continue;
- } else {
- break;
- }
- }//while( 1 )
- }
-
- }
-
- return Status;
-}
-
-/**
- Reads a Byte from I2C Device.
-
- @param I2cControllerIndex I2C Bus no to which the I2C device has been connected
- @param SlaveAddress Device Address from which the byte value has to be read
- @param Offset Offset from which the data has to be read
- @param ReadBytes Number of bytes to be read
- @param *ReadBuffer Address to which the value read has to be stored
-
- @return EFI_SUCCESS IF the byte value has been successfully read
- @return EFI_DEVICE_ERROR Operation Failed, Device Error
-**/
-EFI_STATUS ByteReadI2C(
- IN UINT8 I2cControllerIndex,
- IN UINT8 SlaveAddress,
- IN UINT8 Offset,
- IN UINTN ReadBytes,
- OUT UINT8 *ReadBuffer
- )
-{
- EFI_STATUS Status;
-
- DEBUG ((EFI_D_INFO, "ByteReadI2C:---offset:0x%x\n",Offset));
- Status = ByteWriteI2CBasic(I2cControllerIndex, SlaveAddress,1,&Offset,TRUE,FALSE);
- Status = ByteReadI2CBasic(I2cControllerIndex, SlaveAddress,ReadBytes,ReadBuffer,TRUE,TRUE);
-
- return Status;
-}
-
-/**
- Writes a Byte to I2C Device.
-
- @param I2cControllerIndex I2C Bus no to which the I2C device has been connected
- @param SlaveAddress Device Address from which the byte value has to be written
- @param Offset Offset from which the data has to be written
- @param WriteBytes Number of bytes to be written
- @param *Byte Address to which the value written is stored
-
- @return EFI_SUCCESS IF the byte value has been successfully read
- @return EFI_DEVICE_ERROR Operation Failed, Device Error
-**/
-EFI_STATUS ByteWriteI2C(
- IN UINT8 I2cControllerIndex,
- IN UINT8 SlaveAddress,
- IN UINT8 Offset,
- IN UINTN WriteBytes,
- IN UINT8 *WriteBuffer
- )
-{
- EFI_STATUS Status;
-
- DEBUG ((EFI_D_INFO, "ByteWriteI2C:---offset/bytes/buf:0x%x,0x%x,0x%x,0x%x\n",Offset,WriteBytes,WriteBuffer,*WriteBuffer));
- Status = ByteWriteI2CBasic(I2cControllerIndex, SlaveAddress,1,&Offset,TRUE,FALSE);
- Status = ByteWriteI2CBasic(I2cControllerIndex, SlaveAddress,WriteBytes,WriteBuffer,FALSE,TRUE);
-
- return Status;
-}
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