void I2C_SetConfig(I2cConfigData_t* config) { if (config->IsEnabled) { SFRPAGE = 0x00; TH0 = config->TH0Val; I2C0_reset(); I2C_Enable(); I2C0_init(I2C0_TIMER0, true); } else { I2C_Disable(); } }
void I2C_SetConfig(I2cConfigData_t* config) { if(config->IsEnabled) { I2C0_reset(); I2C_Enable(); I2C0_init(I2C0_TIMER1, true); } else { I2C_Disable(); } }
/***************************************************************************** 函 数 名 : I2CWrite 功能描述 : 支持多字节写,目前支持对控制器1连接的设备的写,即E2PROM 输入参数 : 无 输出参数 : 无 返 回 值 : void 调用函数 : 被调函数 : 修改历史 : *****************************************************************************/ EFI_STATUS EFIAPI I2CWrite(I2C_DEVICE *I2cInfo, UINT16 InfoOffset, UINT32 ulLength, UINT8 *pBuf) { UINT32 ulFifo; UINT32 ulTimes = 0; UINT32 Idx; UINTN Base; //参数判断 if(I2cInfo->Port >= I2C_PORT_MAX) { return EFI_INVALID_PARAMETER; } Base = PlatformGetI2cBase(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); } //往总线上发送写时序 if(I2cInfo->DeviceType) { I2C_REG_WRITE(Base + I2C_DATA_CMD_OFFSET, (InfoOffset >> 8) & 0xff); I2C_REG_WRITE(Base + I2C_DATA_CMD_OFFSET, InfoOffset & 0xff); }
/***************************************************************************** 函 数 名 : I2CInit 功能描述 : 初始化,以便读取SPD信息 输入参数 : void 输出参数 : 无 返 回 值 : 调用函数 : 被调函数 : 修改历史 : *****************************************************************************/ 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 = PlatformGetI2cBase(Socket, Port); if((Socket >= MAX_SOCKET) || (Port >= I2C_PORT_MAX) || (SpeedMode >= SPEED_MODE_MAX)){ return EFI_INVALID_PARAMETER; } //关闭I2C Status = I2C_Disable(Socket,Port); if(EFI_ERROR(Status)) { return EFI_DEVICE_ERROR; } //配置传输模式、速率等 I2C_REG_READ(Base + I2C_CON_OFFSET, I2cControlReg.Val32); I2cControlReg.bits.master = 1; //主模式使能,默认值 I2cControlReg.bits.spedd = 0x1; //标准模式,标准模式下I2C总线的速率为100kb/s I2cControlReg.bits.restart_en = 1; //主模式下restart指令发送使能 I2cControlReg.bits.slave_disable = 1; //从模式不使能 I2C_REG_WRITE(Base + I2C_CON_OFFSET,I2cControlReg.Val32); //设置I2C总线时钟周期 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); } //设置发送、接收FIFO阈值 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); //禁止所有中断 I2C_REG_READ(Base + I2C_INTR_MASK_OFFSET, I2cIntrMask.Val32); I2cIntrMask.Val32 = 0x0; I2C_REG_WRITE(Base + I2C_INTR_MASK_OFFSET, I2cIntrMask.Val32); //使能I2C Status = I2C_Enable(Socket,Port); if(EFI_ERROR(Status)) { return EFI_DEVICE_ERROR; } return EFI_SUCCESS; }
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); }