EFI_STATUS EFIAPI I2C_Enable(UINT32 Socket,UINT8 Port) { I2C0_ENABLE_U I2cEnableReg; I2C0_ENABLE_STATUS_U I2cEnableStatusReg; UINTN Base = GetI2cBase(Socket, Port); I2C_REG_READ(Base + I2C_ENABLE_OFFSET, I2cEnableReg.Val32); I2cEnableReg.bits.enable = 1; I2C_REG_WRITE(Base + I2C_ENABLE_OFFSET, I2cEnableReg.Val32); I2C_REG_READ(Base + I2C_ENABLE_STATUS_OFFSET, I2cEnableStatusReg.Val32); if (1 == I2cEnableStatusReg.bits.ic_en) { return EFI_SUCCESS; } else { return EFI_DEVICE_ERROR; } }
UINT32 I2C_GetTxStatus(UINT32 Socket,UINT8 Port) { I2C0_TXFLR_U ulFifo; UINTN Base = GetI2cBase(Socket, Port); I2C_REG_READ(Base + I2C_TXFLR_OFFSET, ulFifo.Val32); return ulFifo.bits.txflr; }
EFI_STATUS EFIAPI WriteBeforeRead(I2C_DEVICE *I2cInfo, UINT32 ulLength, UINT8 *pBuf) { UINT32 ulFifo; UINT32 ulCnt; UINT32 ulTimes = 0; UINTN Base = GetI2cBase(I2cInfo->Socket, I2cInfo->Port); I2C_SetTarget(I2cInfo->Socket,I2cInfo->Port,I2cInfo->SlaveDeviceAddress); ulFifo = I2C_GetTxStatus(I2cInfo->Socket,I2cInfo->Port); while(0 != ulFifo) { I2C_Delay(2); if(++ulTimes > I2C_READ_TIMEOUT) { return EFI_TIMEOUT; } ulFifo = I2C_GetTxStatus(I2cInfo->Socket,I2cInfo->Port); } ulTimes = 0; for(ulCnt = 0; ulCnt < ulLength; ulCnt++) { while(ulFifo > I2C_TXRX_THRESHOLD) { if(++ulTimes > I2C_READ_TIMEOUT) { return EFI_TIMEOUT; } ulFifo = I2C_GetTxStatus(I2cInfo->Socket,I2cInfo->Port); } I2C_REG_WRITE(Base + I2C_DATA_CMD_OFFSET, *pBuf++); ulFifo = I2C_GetTxStatus(I2cInfo->Socket,I2cInfo->Port); } ulFifo = I2C_GetTxStatus(I2cInfo->Socket,I2cInfo->Port); ulTimes = 0; while(0 != ulFifo) { I2C_Delay(2); if(++ulTimes > I2C_READ_TIMEOUT) { return EFI_TIMEOUT; } ulFifo = I2C_GetTxStatus(I2cInfo->Socket,I2cInfo->Port); } return EFI_SUCCESS; }
void I2C_SetTarget(UINT32 Socket,UINT8 Port,UINT32 I2cDeviceAddr) { I2C0_TAR_U I2cTargetReg; UINTN Base = GetI2cBase(Socket, Port); I2C_REG_READ(Base + I2C_TAR_OFFSET, I2cTargetReg.Val32); I2cTargetReg.bits.ic_tar = I2cDeviceAddr; I2C_REG_WRITE(Base + I2C_TAR_OFFSET, I2cTargetReg.Val32); return; }
EFI_STATUS EFIAPI I2CSdaConfig(UINT32 Socket, UINT32 Port) { UINTN Base = GetI2cBase(Socket, Port); if((Socket >= MAX_SOCKET) || (Port >= I2C_PORT_MAX)){ return EFI_INVALID_PARAMETER; } I2C_REG_WRITE(Base + I2C_SDA_HOLD, 0x14); return EFI_SUCCESS; }
EFI_STATUS I2cLibRuntimeSetup (UINT32 Socket, UINT8 Port) { EFI_STATUS Status; UINTN Base = GetI2cBase (Socket, Port); // Declare the controller as EFI_MEMORY_RUNTIME Status = gDS->AddMemorySpace ( EfiGcdMemoryTypeMemoryMappedIo, Base, SIZE_64KB, EFI_MEMORY_UC | EFI_MEMORY_RUNTIME ); if (EFI_ERROR (Status)) { return Status; } Status = gDS->SetMemorySpaceAttributes (Base, SIZE_64KB, EFI_MEMORY_UC | EFI_MEMORY_RUNTIME); if (EFI_ERROR (Status)) { return Status; } // // Register for the virtual address change event // // Only create event once if (mI2cLibVirtualAddrChangeEvent == NULL) { Status = gBS->CreateEventEx ( EVT_NOTIFY_SIGNAL, TPL_NOTIFY, I2cLibVirtualNotifyEvent, NULL, &gEfiEventVirtualAddressChangeGuid, &mI2cLibVirtualAddrChangeEvent ); if (EFI_ERROR (Status)) { DEBUG ((EFI_D_ERROR, "[%a:%d] Create event failed: %r\n", __FUNCTION__, __LINE__, Status)); return Status; } } return EFI_SUCCESS; }
EFI_STATUS EFIAPI I2C_Disable(UINT32 Socket,UINT8 Port) { UINT32 ulTimeCnt = I2C_READ_TIMEOUT; I2C0_STATUS_U I2cStatusReg; I2C0_ENABLE_U I2cEnableReg; I2C0_ENABLE_STATUS_U I2cEnableStatusReg; UINTN Base = GetI2cBase(Socket, Port); I2C_REG_READ((Base + I2C_STATUS_OFFSET), I2cStatusReg.Val32); while (I2cStatusReg.bits.activity) { I2C_Delay(10000); ulTimeCnt--; I2C_REG_READ(Base + I2C_STATUS_OFFSET, I2cStatusReg.Val32); if (0 == ulTimeCnt) { return EFI_DEVICE_ERROR; } } I2C_REG_READ(Base + I2C_ENABLE_OFFSET, I2cEnableReg.Val32); I2cEnableReg.bits.enable = 0; I2C_REG_WRITE(Base + I2C_ENABLE_OFFSET,I2cEnableReg.Val32); I2C_REG_READ(Base + I2C_ENABLE_OFFSET,I2cEnableStatusReg.Val32); if (0 == I2cEnableStatusReg.bits.ic_en) { return EFI_SUCCESS; } else { return EFI_DEVICE_ERROR; } }
EFI_STATUS EFIAPI I2CWrite(I2C_DEVICE *I2cInfo, UINT16 InfoOffset, UINT32 ulLength, UINT8 *pBuf) { UINT32 ulFifo; UINT32 ulTimes = 0; UINT32 Idx; UINTN Base; if(I2cInfo->Port >= I2C_PORT_MAX) { return EFI_INVALID_PARAMETER; } Base = GetI2cBase(I2cInfo->Socket, I2cInfo->Port); (VOID)I2C_Enable(I2cInfo->Socket, I2cInfo->Port); I2C_SetTarget(I2cInfo->Socket,I2cInfo->Port,I2cInfo->SlaveDeviceAddress); ulFifo = I2C_GetTxStatus(I2cInfo->Socket,I2cInfo->Port); while(0 != ulFifo) { I2C_Delay(2); if(++ulTimes > I2C_READ_TIMEOUT) { (VOID)I2C_Disable(I2cInfo->Socket, I2cInfo->Port); return EFI_TIMEOUT; } ulFifo = I2C_GetTxStatus(I2cInfo->Socket,I2cInfo->Port); } if(I2cInfo->DeviceType) { I2C_REG_WRITE(Base + I2C_DATA_CMD_OFFSET, (InfoOffset >> 8) & 0xff); I2C_REG_WRITE(Base + I2C_DATA_CMD_OFFSET, InfoOffset & 0xff); }
EFI_STATUS EFIAPI I2CInit(UINT32 Socket, UINT32 Port, SPEED_MODE SpeedMode) { I2C0_CON_U I2cControlReg; I2C0_SS_SCL_HCNT_U I2cStandardSpeedSclHighCount; I2C0_SS_SCL_LCNT_U I2cStandardSpeedSclLowCount; I2C0_RX_TL_U I2cRxFifoReg; I2C0_TX_TL_U I2cTxFifoReg; I2C0_INTR_MASK_U I2cIntrMask; EFI_STATUS Status; UINTN Base = GetI2cBase(Socket, Port); if((Socket >= MAX_SOCKET) || (Port >= I2C_PORT_MAX) || (SpeedMode >= SPEED_MODE_MAX)){ return EFI_INVALID_PARAMETER; } Status = I2C_Disable(Socket,Port); if(EFI_ERROR(Status)) { return EFI_DEVICE_ERROR; } I2C_REG_READ(Base + I2C_CON_OFFSET, I2cControlReg.Val32); I2cControlReg.bits.master = 1; I2cControlReg.bits.spedd = 0x1; I2cControlReg.bits.restart_en = 1; I2cControlReg.bits.slave_disable = 1; I2C_REG_WRITE(Base + I2C_CON_OFFSET,I2cControlReg.Val32); if(Normal == SpeedMode) { I2C_REG_READ(Base + I2C_SS_SCL_HCNT_OFFSET,I2cStandardSpeedSclHighCount.Val32); I2cStandardSpeedSclHighCount.bits.ic_ss_scl_hcnt = I2C_SS_SCLHCNT; I2C_REG_WRITE(Base + I2C_SS_SCL_HCNT_OFFSET, I2cStandardSpeedSclHighCount.Val32); I2C_REG_READ(Base + I2C_SS_SCL_LCNT_OFFSET, I2cStandardSpeedSclLowCount.Val32); I2cStandardSpeedSclLowCount.bits.ic_ss_scl_lcnt = I2C_SS_SCLLCNT; I2C_REG_WRITE(Base + I2C_SS_SCL_LCNT_OFFSET, I2cStandardSpeedSclLowCount.Val32); } else { I2C_REG_READ(Base + I2C_FS_SCL_HCNT_OFFSET,I2cStandardSpeedSclHighCount.Val32); I2cStandardSpeedSclHighCount.bits.ic_ss_scl_hcnt = I2C_SS_SCLHCNT; I2C_REG_WRITE(Base + I2C_FS_SCL_HCNT_OFFSET, I2cStandardSpeedSclHighCount.Val32); I2C_REG_READ(Base + I2C_FS_SCL_LCNT_OFFSET, I2cStandardSpeedSclLowCount.Val32); I2cStandardSpeedSclLowCount.bits.ic_ss_scl_lcnt = I2C_SS_SCLLCNT; I2C_REG_WRITE(Base + I2C_FS_SCL_LCNT_OFFSET, I2cStandardSpeedSclLowCount.Val32); } I2C_REG_READ(Base + I2C_RX_TL_OFFSET, I2cRxFifoReg.Val32); I2cRxFifoReg.bits.rx_tl = I2C_TXRX_THRESHOLD; I2C_REG_WRITE(Base + I2C_RX_TL_OFFSET, I2cRxFifoReg.Val32); I2C_REG_READ(Base + I2C_TX_TL_OFFSET,I2cTxFifoReg.Val32); I2cTxFifoReg.bits.tx_tl = I2C_TXRX_THRESHOLD; I2C_REG_WRITE(Base + I2C_TX_TL_OFFSET, I2cTxFifoReg.Val32); I2C_REG_READ(Base + I2C_INTR_MASK_OFFSET, I2cIntrMask.Val32); I2cIntrMask.Val32 = 0x0; I2C_REG_WRITE(Base + I2C_INTR_MASK_OFFSET, I2cIntrMask.Val32); Status = I2C_Enable(Socket,Port); if(EFI_ERROR(Status)) { return EFI_DEVICE_ERROR; } return I2cLibRuntimeSetup (Socket, Port); }