ski2c.c

u-boot-1.1.6 源码包

 * Send an NACK.
 */
void SkI2cSndNAck(
SK_IOC	IoC)	/* I/O Context */
{
	/*
	 * Received bit must be zero.
	 */
	SkI2cSndBit(IoC, 1);
}	/* SkI2cSndNAck */


/*
 * Send an ACK.
 */
void SkI2cSndAck(
SK_IOC IoC)	/* I/O Context */
{
	/*
	 * Received bit must be zero.
	 *
	 */
	SkI2cSndBit(IoC, 0);
}	/* SkI2cSndAck */


/*
 * Send one byte to the I2C device and wait for ACK.
 *
 * Return acknowleged status.
 */
int SkI2cSndByte(
SK_IOC	IoC,	/* I/O Context */
int		Byte)	/* byte to send */
{
	int	i;

	for (i = 0; i < 8; i++) {
		if (Byte & (1<<(7-i))) {
			SkI2cSndBit(IoC, 1);
		}
		else {
			SkI2cSndBit(IoC, 0);
		}
	}

	return(SkI2cRcvAck(IoC));
}	/* SkI2cSndByte */


/*
 * Receive one byte and ack it.
 *
 * Return byte.
 */
int SkI2cRcvByte(
SK_IOC	IoC,	/* I/O Context */
int		Last)	/* Last Byte Flag */
{
	int	i;
	int	Byte = 0;

	for (i = 0; i < 8; i++) {
		Byte <<= 1;
		Byte |= SkI2cRcvBit(IoC);
	}

	if (Last) {
		SkI2cSndNAck(IoC);
	}
	else {
		SkI2cSndAck(IoC);
	}

	return(Byte);
}	/* SkI2cRcvByte */


/*
 * Start dialog and send device address
 *
 * Return 0 if acknowleged, 1 in case of an error
 */
int	SkI2cSndDev(
SK_IOC	IoC,	/* I/O Context */
int		Addr,	/* Device Address */
int		Rw)		/* Read / Write Flag */
{
	SkI2cStart(IoC);
	Rw = ~Rw;
	Rw &= I2C_WRITE;
	return(SkI2cSndByte(IoC, (Addr<<1) | Rw));
}	/* SkI2cSndDev */

#endif	/* SK_DIAG */

/*----------------- I2C CTRL Register Functions ----------*/

/*
 * waits for a completion of an I2C transfer
 *
 * returns	0:	success, transfer completes
 *			1:	error,	 transfer does not complete, I2C transfer
 *						 killed, wait loop terminated.
 */
int	SkI2cWait(
SK_AC	*pAC,	/* Adapter Context */
SK_IOC	IoC,	/* I/O Context */
int		Event)	/* complete event to wait for (I2C_READ or I2C_WRITE) */
{
	SK_U64	StartTime;
	SK_U64	CurrentTime;
	SK_U32	I2cCtrl;

	StartTime = SkOsGetTime(pAC);

	do {
		CurrentTime = SkOsGetTime(pAC);

		if (CurrentTime - StartTime > SK_TICKS_PER_SEC / 8) {

			SK_I2C_STOP(IoC);
#ifndef SK_DIAG
			SK_ERR_LOG(pAC, SK_ERRCL_SW, SKERR_I2C_E002, SKERR_I2C_E002MSG);
#endif	/* !SK_DIAG */
			return(1);
		}

		SK_I2C_GET_CTL(IoC, &I2cCtrl);

#ifdef xYUKON_DBG
		printf("StartTime=%lu, CurrentTime=%lu\n",
			StartTime, CurrentTime);
		if (kbhit()) {
			return(1);
		}
#endif /* YUKON_DBG */

	} while ((I2cCtrl & I2C_FLAG) == (SK_U32)Event << 31);

	return(0);
}	/* SkI2cWait */


/*
 * waits for a completion of an I2C transfer
 *
 * Returns
 *	Nothing
 */
void SkI2cWaitIrq(
SK_AC	*pAC,	/* Adapter Context */
SK_IOC	IoC)	/* I/O Context */
{
	SK_SENSOR	*pSen;
	SK_U64		StartTime;
	SK_U32		IrqSrc;

	pSen = &pAC->I2c.SenTable[pAC->I2c.CurrSens];

	if (pSen->SenState == SK_SEN_IDLE) {
		return;
	}

	StartTime = SkOsGetTime(pAC);
	do {
		if (SkOsGetTime(pAC) - StartTime > SK_TICKS_PER_SEC / 8) {
			SK_I2C_STOP(IoC);
#ifndef SK_DIAG
			SK_ERR_LOG(pAC, SK_ERRCL_SW, SKERR_I2C_E016, SKERR_I2C_E016MSG);
#endif	/* !SK_DIAG */
			return;
		}
		SK_IN32(IoC, B0_ISRC, &IrqSrc);
	} while ((IrqSrc & IS_I2C_READY) == 0);

	pSen->SenState = SK_SEN_IDLE;
	return;
}	/* SkI2cWaitIrq */

/*
 * writes a single byte or 4 bytes into the I2C device
 *
 * returns	0:	success
 *			1:	error
 */
int SkI2cWrite(
SK_AC	*pAC,		/* Adapter Context */
SK_IOC	IoC,		/* I/O Context */
SK_U32	I2cData,	/* I2C Data to write */
int		I2cDev,		/* I2C Device Address */
int		I2cReg,		/* I2C Device Register Address */
int		I2cBurst)	/* I2C Burst Flag */
{
	SK_OUT32(IoC, B2_I2C_DATA, I2cData);
	SK_I2C_CTL(IoC, I2C_WRITE, I2cDev, I2cReg, I2cBurst);

	return(SkI2cWait(pAC, IoC, I2C_WRITE));
}	/* SkI2cWrite*/


#ifdef	SK_DIAG

/*
 * reads a single byte or 4 bytes from the I2C device
 *
 * returns	the word read
 */
SK_U32 SkI2cRead(
SK_AC	*pAC,		/* Adapter Context */
SK_IOC	IoC,		/* I/O Context */
int		I2cDev,		/* I2C Device Address */
int		I2cReg,		/* I2C Device Register Address */
int		I2cBurst)	/* I2C Burst Flag */
{
	SK_U32	Data;

	SK_OUT32(IoC, B2_I2C_DATA, 0);
	SK_I2C_CTL(IoC, I2C_READ, I2cDev, I2cReg, I2cBurst);

	if (SkI2cWait(pAC, IoC, I2C_READ) != 0) {
		w_print("%s\n", SKERR_I2C_E002MSG);
	}

	SK_IN32(IoC, B2_I2C_DATA, &Data);
	return(Data);
}	/* SkI2cRead */

#endif	/* SK_DIAG */


/*
 * read a sensor's value
 *
 * This function reads a sensor's value from the I2C sensor chip. The sensor
 * is defined by its index into the sensors database in the struct pAC points
 * to.
 * Returns
 *		1 if the read is completed
 *		0 if the read must be continued (I2C Bus still allocated)
 */
int	SkI2cReadSensor(
SK_AC		*pAC,	/* Adapter Context */
SK_IOC		IoC,	/* I/O Context */
SK_SENSOR	*pSen)	/* Sensor to be read */
{
    if (pSen->SenRead != NULL) {
	return((*pSen->SenRead)(pAC, IoC, pSen));
    }
    else
	return(0); /* no success */
}	/* SkI2cReadSensor*/

/*
 * Do the Init state 0 initialization
 */
static int SkI2cInit0(
SK_AC	*pAC)	/* Adapter Context */
{
	int	i;

	/* Begin with first sensor */
	pAC->I2c.CurrSens = 0;

	/* Begin with timeout control for state machine */
	pAC->I2c.TimerMode = SK_TIMER_WATCH_STATEMACHINE;

	/* Set sensor number to zero */
	pAC->I2c.MaxSens = 0;

#ifndef	SK_DIAG
	/* Initialize Number of Dummy Reads */
	pAC->I2c.DummyReads = SK_MAX_SENSORS;
#endif

	for (i = 0; i < SK_MAX_SENSORS; i++) {
		pAC->I2c.SenTable[i].SenDesc = "unknown";
		pAC->I2c.SenTable[i].SenType = SK_SEN_UNKNOWN;
		pAC->I2c.SenTable[i].SenThreErrHigh = 0;
		pAC->I2c.SenTable[i].SenThreErrLow = 0;
		pAC->I2c.SenTable[i].SenThreWarnHigh = 0;
		pAC->I2c.SenTable[i].SenThreWarnLow = 0;
		pAC->I2c.SenTable[i].SenReg = LM80_FAN2_IN;
		pAC->I2c.SenTable[i].SenInit = SK_SEN_DYN_INIT_NONE;
		pAC->I2c.SenTable[i].SenValue = 0;
		pAC->I2c.SenTable[i].SenErrFlag = SK_SEN_ERR_NOT_PRESENT;
		pAC->I2c.SenTable[i].SenErrCts = 0;
		pAC->I2c.SenTable[i].SenBegErrTS = 0;
		pAC->I2c.SenTable[i].SenState = SK_SEN_IDLE;
		pAC->I2c.SenTable[i].SenRead = NULL;
		pAC->I2c.SenTable[i].SenDev = 0;
	}

	/* Now we are "INIT data"ed */
	pAC->I2c.InitLevel = SK_INIT_DATA;
	return(0);
}	/* SkI2cInit0*/


/*
 * Do the init state 1 initialization
 *
 * initialize the following register of the LM80:
 * Configuration register:
 * - START, noINT, activeLOW, noINT#Clear, noRESET, noCI, noGPO#, noINIT
 *
 * Interrupt Mask Register 1:
 * - all interrupts are Disabled (0xff)
 *
 * Interrupt Mask Register 2:
 * - all interrupts are Disabled (0xff) Interrupt modi doesn't matter.
 *
 * Fan Divisor/RST_OUT register:
 * - Divisors set to 1 (bits 00), all others 0s.
 *
 * OS# Configuration/Temperature resolution Register:
 * - all 0s
 *
 */
static int SkI2cInit1(
SK_AC	*pAC,	/* Adapter Context */
SK_IOC	IoC)	/* I/O Context */
{
    int i;
    SK_U8 I2cSwCtrl;
	SK_GEPORT *pPrt;	/* GIni Port struct pointer */

	if (pAC->I2c.InitLevel != SK_INIT_DATA) {
		/* ReInit not needed in I2C module */
		return(0);
	}

    /* Set the Direction of I2C-Data Pin to IN */
    SK_I2C_CLR_BIT(IoC, I2C_DATA_DIR | I2C_DATA);
    /* Check for 32-Bit Yukon with Low at I2C-Data Pin */
	SK_I2C_GET_SW(IoC, &I2cSwCtrl);

	if ((I2cSwCtrl & I2C_DATA) == 0) {
		/* this is a 32-Bit board */
		pAC->GIni.GIYukon32Bit = SK_TRUE;
	return(0);
    }

	/* Check for 64 Bit Yukon without sensors */
	if (SkI2cWrite(pAC, IoC, 0, LM80_ADDR, LM80_CFG, 0) != 0) {
	return(0);
    }

	(void)SkI2cWrite(pAC, IoC, 0xff, LM80_ADDR, LM80_IMSK_1, 0);

	(void)SkI2cWrite(pAC, IoC, 0xff, LM80_ADDR, LM80_IMSK_2, 0);

	(void)SkI2cWrite(pAC, IoC, 0, LM80_ADDR, LM80_FAN_CTRL, 0);

	(void)SkI2cWrite(pAC, IoC, 0, LM80_ADDR, LM80_TEMP_CTRL, 0);

	(void)SkI2cWrite(pAC, IoC, LM80_CFG_START, LM80_ADDR, LM80_CFG, 0);

	/*
	 * MaxSens has to be updated here, because PhyType is not
	 * set when performing Init Level 0
	 */
    pAC->I2c.MaxSens = 5;

	pPrt = &pAC->GIni.GP[0];

	if (pAC->GIni.GIGenesis) {
		if (pPrt->PhyType == SK_PHY_BCOM) {
			if (pAC->GIni.GIMacsFound == 1) {
				pAC->I2c.MaxSens += 1;
			}
			else {
				pAC->I2c.MaxSens += 3;
			}
		}
	}
	else {
		pAC->I2c.MaxSens += 3;
	}

	for (i = 0; i < pAC->I2c.MaxSens; i++) {
		switch (i) {
		case 0:
			pAC->I2c.SenTable[i].SenDesc = "Temperature";
			pAC->I2c.SenTable[i].SenType = SK_SEN_TEMP;
			pAC->I2c.SenTable[i].SenThreErrHigh = SK_SEN_TEMP_HIGH_ERR;
			pAC->I2c.SenTable[i].SenThreWarnHigh = SK_SEN_TEMP_HIGH_WARN;
			pAC->I2c.SenTable[i].SenThreWarnLow = SK_SEN_TEMP_LOW_WARN;
			pAC->I2c.SenTable[i].SenThreErrLow = SK_SEN_TEMP_LOW_ERR;
			pAC->I2c.SenTable[i].SenReg = LM80_TEMP_IN;
			break;
		case 1:
			pAC->I2c.SenTable[i].SenDesc = "Voltage PCI";
			pAC->I2c.SenTable[i].SenType = SK_SEN_VOLT;
			pAC->I2c.SenTable[i].SenThreErrHigh = SK_SEN_PCI_5V_HIGH_ERR;
			pAC->I2c.SenTable[i].SenThreWarnHigh = SK_SEN_PCI_5V_HIGH_WARN;
			pAC->I2c.SenTable[i].SenThreWarnLow = SK_SEN_PCI_5V_LOW_WARN;
			pAC->I2c.SenTable[i].SenThreErrLow = SK_SEN_PCI_5V_LOW_ERR;
			pAC->I2c.SenTable[i].SenReg = LM80_VT0_IN;
			break;
		case 2:
			pAC->I2c.SenTable[i].SenDesc = "Voltage PCI-IO";
			pAC->I2c.SenTable[i].SenType = SK_SEN_VOLT;
			pAC->I2c.SenTable[i].SenThreErrHigh = SK_SEN_PCI_IO_5V_HIGH_ERR;
			pAC->I2c.SenTable[i].SenThreWarnHigh = SK_SEN_PCI_IO_5V_HIGH_WARN;
			pAC->I2c.SenTable[i].SenThreWarnLow = SK_SEN_PCI_IO_3V3_LOW_WARN;
			pAC->I2c.SenTable[i].SenThreErrLow = SK_SEN_PCI_IO_3V3_LOW_ERR;
			pAC->I2c.SenTable[i].SenReg = LM80_VT1_IN;
			pAC->I2c.SenTable[i].SenInit = SK_SEN_DYN_INIT_PCI_IO;
			break;
		case 3:
			pAC->I2c.SenTable[i].SenDesc = "Voltage ASIC";
			pAC->I2c.SenTable[i].SenType = SK_SEN_VOLT;
			pAC->I2c.SenTable[i].SenThreErrHigh = SK_SEN_VDD_HIGH_ERR;
			pAC->I2c.SenTable[i].SenThreWarnHigh = SK_SEN_VDD_HIGH_WARN;
			pAC->I2c.SenTable[i].SenThreWarnLow = SK_SEN_VDD_LOW_WARN;
			pAC->I2c.SenTable[i].SenThreErrLow = SK_SEN_VDD_LOW_ERR;
			pAC->I2c.SenTable[i].SenReg = LM80_VT2_IN;
			break;
		case 4:
			if (pAC->GIni.GIGenesis) {
				if (pPrt->PhyType == SK_PHY_BCOM) {
					pAC->I2c.SenTable[i].SenDesc = "Voltage PHY A PLL";
					pAC->I2c.SenTable[i].SenThreErrHigh = SK_SEN_PLL_3V3_HIGH_ERR;
					pAC->I2c.SenTable[i].SenThreWarnHigh = SK_SEN_PLL_3V3_HIGH_WARN;
					pAC->I2c.SenTable[i].SenThreWarnLow = SK_SEN_PLL_3V3_LOW_WARN;
					pAC->I2c.SenTable[i].SenThreErrLow = SK_SEN_PLL_3V3_LOW_ERR;
				}
				else {
					pAC->I2c.SenTable[i].SenDesc = "Voltage PMA";
					pAC->I2c.SenTable[i].SenThreErrHigh = SK_SEN_PLL_3V3_HIGH_ERR;
					pAC->I2c.SenTable[i].SenThreWarnHigh = SK_SEN_PLL_3V3_HIGH_WARN;
					pAC->I2c.SenTable[i].SenThreWarnLow = SK_SEN_PLL_3V3_LOW_WARN;
					pAC->I2c.SenTable[i].SenThreErrLow = SK_SEN_PLL_3V3_LOW_ERR;
				}
			}
			else {
				pAC->I2c.SenTable[i].SenDesc = "Voltage VAUX";
				pAC->I2c.SenTable[i].SenThreErrHigh = SK_SEN_VAUX_3V3_HIGH_ERR;
				pAC->I2c.SenTable[i].SenThreWarnHigh = SK_SEN_VAUX_3V3_HIGH_WARN;
				if (pAC->GIni.GIVauxAvail) {
					pAC->I2c.SenTable[i].SenThreWarnLow = SK_SEN_VAUX_3V3_LOW_WARN;
					pAC->I2c.SenTable[i].SenThreErrLow = SK_SEN_VAUX_3V3_LOW_ERR;
				}
				else {
					pAC->I2c.SenTable[i].SenThreErrLow = SK_SEN_VAUX_0V_WARN_ERR;
					pAC->I2c.SenTable[i].SenThreWarnLow = SK_SEN_VAUX_0V_WARN_ERR;
				}
			}
			pAC->I2c.SenTable[i].SenType = SK_SEN_VOLT;
			pAC->I2c.SenTable[i].SenReg = LM80_VT3_IN;
			break;
		case 5:
			if (pAC->GIni.GIGenesis) {
				pAC->I2c.SenTable[i].SenDesc = "Voltage PHY 2V5";
				pAC->I2c.SenTable[i].SenThreErrHigh = SK_SEN_PHY_2V5_HIGH_ERR;
				pAC->I2c.SenTable[i].SenThreWarnHigh = SK_SEN_PHY_2V5_HIGH_WARN;
				pAC->I2c.SenTable[i].SenThreWarnLow = SK_SEN_PHY_2V5_LOW_WARN;
				pAC->I2c.SenTable[i].SenThreErrLow = SK_SEN_PHY_2V5_LOW_ERR;
			}
			else {
				pAC->I2c.SenTable[i].SenDesc = "Voltage ASIC-Co 1V5";
				pAC->I2c.SenTable[i].SenThreErrHigh = SK_SEN_CORE_1V5_HIGH_ERR;
				pAC->I2c.SenTable[i].SenThreWarnHigh = SK_SEN_CORE_1V5_HIGH_WARN;
				pAC->I2c.SenTable[i].SenThreWarnLow = SK_SEN_CORE_1V5_LOW_WARN;
				pAC->I2c.SenTable[i].SenThreErrLow = SK_SEN_CORE_1V5_LOW_ERR;
			}
			pAC->I2c.SenTable[i].SenType = SK_SEN_VOLT;
			pAC->I2c.SenTable[i].SenReg = LM80_VT4_IN;
			break;
		case 6:
			if (pAC->GIni.GIGenesis) {
				pAC->I2c.SenTable[i].SenDesc = "Voltage PHY B PLL";
			}
			else {
				pAC->I2c.SenTable[i].SenDesc = "Voltage PHY 3V3";
			}
			pAC->I2c.SenTable[i].SenType = SK_SEN_VOLT;
			pAC->I2c.SenTable[i].SenThreErrHigh = SK_SEN_PLL_3V3_HIGH_ERR;
			pAC->I2c.SenTable[i].SenThreWarnHigh = SK_SEN_PLL_3V3_HIGH_WARN;
			pAC->I2c.SenTable[i].SenThreWarnLow = SK_SEN_PLL_3V3_LOW_WARN;
			pAC->I2c.SenTable[i].SenThreErrLow = SK_SEN_PLL_3V3_LOW_ERR;
			pAC->I2c.SenTable[i].SenReg = LM80_VT5_IN;
			break;
		case 7:
			if (pAC->GIni.GIGenesis) {
				pAC->I2c.SenTable[i].SenDesc = "Speed Fan";
				pAC->I2c.SenTable[i].SenType = SK_SEN_FAN;
				pAC->I2c.SenTable[i].SenThreErrHigh = SK_SEN_FAN_HIGH_ERR;
				pAC->I2c.SenTable[i].SenThreWarnHigh = SK_SEN_FAN_HIGH_WARN;
				pAC->I2c.SenTable[i].SenThreWarnLow = SK_SEN_FAN_LOW_WARN;
				pAC->I2c.SenTable[i].SenThreErrLow = SK_SEN_FAN_LOW_ERR;
				pAC->I2c.SenTable[i].SenReg = LM80_FAN2_IN;
			}
			else {
				pAC->I2c.SenTable[i].SenDesc = "Voltage PHY 2V5";
				pAC->I2c.SenTable[i].SenType = SK_SEN_VOLT;
				pAC->I2c.SenTable[i].SenThreErrHigh = SK_SEN_PHY_2V5_HIGH_ERR;
				pAC->I2c.SenTable[i].SenThreWarnHigh = SK_SEN_PHY_2V5_HIGH_WARN;
				pAC->I2c.SenTable[i].SenThreWarnLow = SK_SEN_PHY_2V5_LOW_WARN;
				pAC->I2c.SenTable[i].SenThreErrLow = SK_SEN_PHY_2V5_LOW_ERR;
				pAC->I2c.SenTable[i].SenReg = LM80_VT6_IN;